xref: /vim-8.2.3635/src/eval.c (revision f193fffd) 
1 /* vi:set ts=8 sts=4 sw=4:
2  *
3  * VIM - Vi IMproved	by Bram Moolenaar
4  *
5  * Do ":help uganda"  in Vim to read copying and usage conditions.
6  * Do ":help credits" in Vim to see a list of people who contributed.
7  * See README.txt for an overview of the Vim source code.
8  */
9 
10 /*
11  * eval.c: Expression evaluation.
12  */
13 #if defined(MSDOS) || defined(MSWIN)
14 # include "vimio.h"	/* for mch_open(), must be before vim.h */
15 #endif
16 
17 #include "vim.h"
18 
19 #ifdef AMIGA
20 # include <time.h>	/* for strftime() */
21 #endif
22 
23 #ifdef MACOS
24 # include <time.h>	/* for time_t */
25 #endif
26 
27 #ifdef HAVE_FCNTL_H
28 # include <fcntl.h>
29 #endif
30 
31 #if defined(FEAT_EVAL) || defined(PROTO)
32 
33 #define DICT_MAXNEST 100	/* maximum nesting of lists and dicts */
34 
35 /*
36  * In a hashtab item "hi_key" points to "di_key" in a dictitem.
37  * This avoids adding a pointer to the hashtab item.
38  * DI2HIKEY() converts a dictitem pointer to a hashitem key pointer.
39  * HIKEY2DI() converts a hashitem key pointer to a dictitem pointer.
40  * HI2DI() converts a hashitem pointer to a dictitem pointer.
41  */
42 static dictitem_T dumdi;
43 #define DI2HIKEY(di) ((di)->di_key)
44 #define HIKEY2DI(p)  ((dictitem_T *)(p - (dumdi.di_key - (char_u *)&dumdi)))
45 #define HI2DI(hi)     HIKEY2DI((hi)->hi_key)
46 
47 /*
48  * Structure returned by get_lval() and used by set_var_lval().
49  * For a plain name:
50  *	"name"	    points to the variable name.
51  *	"exp_name"  is NULL.
52  *	"tv"	    is NULL
53  * For a magic braces name:
54  *	"name"	    points to the expanded variable name.
55  *	"exp_name"  is non-NULL, to be freed later.
56  *	"tv"	    is NULL
57  * For an index in a list:
58  *	"name"	    points to the (expanded) variable name.
59  *	"exp_name"  NULL or non-NULL, to be freed later.
60  *	"tv"	    points to the (first) list item value
61  *	"li"	    points to the (first) list item
62  *	"range", "n1", "n2" and "empty2" indicate what items are used.
63  * For an existing Dict item:
64  *	"name"	    points to the (expanded) variable name.
65  *	"exp_name"  NULL or non-NULL, to be freed later.
66  *	"tv"	    points to the dict item value
67  *	"newkey"    is NULL
68  * For a non-existing Dict item:
69  *	"name"	    points to the (expanded) variable name.
70  *	"exp_name"  NULL or non-NULL, to be freed later.
71  *	"tv"	    points to the Dictionary typval_T
72  *	"newkey"    is the key for the new item.
73  */
74 typedef struct lval_S
75 {
76     char_u	*ll_name;	/* start of variable name (can be NULL) */
77     char_u	*ll_exp_name;	/* NULL or expanded name in allocated memory. */
78     typval_T	*ll_tv;		/* Typeval of item being used.  If "newkey"
79 				   isn't NULL it's the Dict to which to add
80 				   the item. */
81     listitem_T	*ll_li;		/* The list item or NULL. */
82     list_T	*ll_list;	/* The list or NULL. */
83     int		ll_range;	/* TRUE when a [i:j] range was used */
84     long	ll_n1;		/* First index for list */
85     long	ll_n2;		/* Second index for list range */
86     int		ll_empty2;	/* Second index is empty: [i:] */
87     dict_T	*ll_dict;	/* The Dictionary or NULL */
88     dictitem_T	*ll_di;		/* The dictitem or NULL */
89     char_u	*ll_newkey;	/* New key for Dict in alloc. mem or NULL. */
90 } lval_T;
91 
92 
93 static char *e_letunexp	= N_("E18: Unexpected characters in :let");
94 static char *e_listidx = N_("E684: list index out of range: %ld");
95 static char *e_undefvar = N_("E121: Undefined variable: %s");
96 static char *e_missbrac = N_("E111: Missing ']'");
97 static char *e_listarg = N_("E686: Argument of %s must be a List");
98 static char *e_listdictarg = N_("E712: Argument of %s must be a List or Dictionary");
99 static char *e_emptykey = N_("E713: Cannot use empty key for Dictionary");
100 static char *e_listreq = N_("E714: List required");
101 static char *e_dictreq = N_("E715: Dictionary required");
102 static char *e_toomanyarg = N_("E118: Too many arguments for function: %s");
103 static char *e_dictkey = N_("E716: Key not present in Dictionary: %s");
104 static char *e_funcexts = N_("E122: Function %s already exists, add ! to replace it");
105 static char *e_funcdict = N_("E717: Dictionary entry already exists");
106 static char *e_funcref = N_("E718: Funcref required");
107 static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary");
108 static char *e_letwrong = N_("E734: Wrong variable type for %s=");
109 static char *e_nofunc = N_("E130: Unknown function: %s");
110 static char *e_illvar = N_("E461: Illegal variable name: %s");
111 /*
112  * All user-defined global variables are stored in dictionary "globvardict".
113  * "globvars_var" is the variable that is used for "g:".
114  */
115 static dict_T		globvardict;
116 static dictitem_T	globvars_var;
117 #define globvarht globvardict.dv_hashtab
118 
119 /*
120  * Old Vim variables such as "v:version" are also available without the "v:".
121  * Also in functions.  We need a special hashtable for them.
122  */
123 static hashtab_T	compat_hashtab;
124 
125 /*
126  * When recursively copying lists and dicts we need to remember which ones we
127  * have done to avoid endless recursiveness.  This unique ID is used for that.
128  */
129 static int current_copyID = 0;
130 
131 /*
132  * Array to hold the hashtab with variables local to each sourced script.
133  * Each item holds a variable (nameless) that points to the dict_T.
134  */
135 typedef struct
136 {
137     dictitem_T	sv_var;
138     dict_T	sv_dict;
139 } scriptvar_T;
140 
141 static garray_T	    ga_scripts = {0, 0, sizeof(scriptvar_T), 4, NULL};
142 #define SCRIPT_SV(id) (((scriptvar_T *)ga_scripts.ga_data)[(id) - 1])
143 #define SCRIPT_VARS(id) (SCRIPT_SV(id).sv_dict.dv_hashtab)
144 
145 static int echo_attr = 0;   /* attributes used for ":echo" */
146 
147 /* Values for trans_function_name() argument: */
148 #define TFN_INT		1	/* internal function name OK */
149 #define TFN_QUIET	2	/* no error messages */
150 
151 /*
152  * Structure to hold info for a user function.
153  */
154 typedef struct ufunc ufunc_T;
155 
156 struct ufunc
157 {
158     int		uf_varargs;	/* variable nr of arguments */
159     int		uf_flags;
160     int		uf_calls;	/* nr of active calls */
161     garray_T	uf_args;	/* arguments */
162     garray_T	uf_lines;	/* function lines */
163 #ifdef FEAT_PROFILE
164     int		uf_profiling;	/* TRUE when func is being profiled */
165     /* profiling the function as a whole */
166     int		uf_tm_count;	/* nr of calls */
167     proftime_T	uf_tm_total;	/* time spend in function + children */
168     proftime_T	uf_tm_self;	/* time spend in function itself */
169     proftime_T	uf_tm_start;	/* time at function call */
170     proftime_T	uf_tm_children;	/* time spent in children this call */
171     /* profiling the function per line */
172     int		*uf_tml_count;	/* nr of times line was executed */
173     proftime_T	*uf_tml_total;	/* time spend in a line + children */
174     proftime_T	*uf_tml_self;	/* time spend in a line itself */
175     proftime_T	uf_tml_start;	/* start time for current line */
176     proftime_T	uf_tml_children; /* time spent in children for this line */
177     proftime_T	uf_tml_wait;	/* start wait time for current line */
178     int		uf_tml_idx;	/* index of line being timed; -1 if none */
179     int		uf_tml_execed;	/* line being timed was executed */
180 #endif
181     scid_T	uf_script_ID;	/* ID of script where function was defined,
182 				   used for s: variables */
183     int		uf_refcount;	/* for numbered function: reference count */
184     char_u	uf_name[1];	/* name of function (actually longer); can
185 				   start with <SNR>123_ (<SNR> is K_SPECIAL
186 				   KS_EXTRA KE_SNR) */
187 };
188 
189 /* function flags */
190 #define FC_ABORT    1		/* abort function on error */
191 #define FC_RANGE    2		/* function accepts range */
192 #define FC_DICT	    4		/* Dict function, uses "self" */
193 
194 #define DEL_REFCOUNT	999999	/* list/dict is being deleted */
195 
196 /*
197  * All user-defined functions are found in this hashtable.
198  */
199 static hashtab_T	func_hashtab;
200 
201 /* list heads for garbage collection */
202 static dict_T		*first_dict = NULL;	/* list of all dicts */
203 static list_T		*first_list = NULL;	/* list of all lists */
204 
205 /* From user function to hashitem and back. */
206 static ufunc_T dumuf;
207 #define UF2HIKEY(fp) ((fp)->uf_name)
208 #define HIKEY2UF(p)  ((ufunc_T *)(p - (dumuf.uf_name - (char_u *)&dumuf)))
209 #define HI2UF(hi)     HIKEY2UF((hi)->hi_key)
210 
211 #define FUNCARG(fp, j)	((char_u **)(fp->uf_args.ga_data))[j]
212 #define FUNCLINE(fp, j)	((char_u **)(fp->uf_lines.ga_data))[j]
213 
214 #define MAX_FUNC_ARGS	20	/* maximum number of function arguments */
215 #define VAR_SHORT_LEN	20	/* short variable name length */
216 #define FIXVAR_CNT	12	/* number of fixed variables */
217 
218 /* structure to hold info for a function that is currently being executed. */
219 typedef struct funccall_S funccall_T;
220 
221 struct funccall_S
222 {
223     ufunc_T	*func;		/* function being called */
224     int		linenr;		/* next line to be executed */
225     int		returned;	/* ":return" used */
226     struct			/* fixed variables for arguments */
227     {
228 	dictitem_T	var;		/* variable (without room for name) */
229 	char_u	room[VAR_SHORT_LEN];	/* room for the name */
230     } fixvar[FIXVAR_CNT];
231     dict_T	l_vars;		/* l: local function variables */
232     dictitem_T	l_vars_var;	/* variable for l: scope */
233     dict_T	l_avars;	/* a: argument variables */
234     dictitem_T	l_avars_var;	/* variable for a: scope */
235     list_T	l_varlist;	/* list for a:000 */
236     listitem_T	l_listitems[MAX_FUNC_ARGS];	/* listitems for a:000 */
237     typval_T	*rettv;		/* return value */
238     linenr_T	breakpoint;	/* next line with breakpoint or zero */
239     int		dbg_tick;	/* debug_tick when breakpoint was set */
240     int		level;		/* top nesting level of executed function */
241 #ifdef FEAT_PROFILE
242     proftime_T	prof_child;	/* time spent in a child */
243 #endif
244     funccall_T	*caller;	/* calling function or NULL */
245 };
246 
247 /*
248  * Info used by a ":for" loop.
249  */
250 typedef struct
251 {
252     int		fi_semicolon;	/* TRUE if ending in '; var]' */
253     int		fi_varcount;	/* nr of variables in the list */
254     listwatch_T	fi_lw;		/* keep an eye on the item used. */
255     list_T	*fi_list;	/* list being used */
256 } forinfo_T;
257 
258 /*
259  * Struct used by trans_function_name()
260  */
261 typedef struct
262 {
263     dict_T	*fd_dict;	/* Dictionary used */
264     char_u	*fd_newkey;	/* new key in "dict" in allocated memory */
265     dictitem_T	*fd_di;		/* Dictionary item used */
266 } funcdict_T;
267 
268 
269 /*
270  * Array to hold the value of v: variables.
271  * The value is in a dictitem, so that it can also be used in the v: scope.
272  * The reason to use this table anyway is for very quick access to the
273  * variables with the VV_ defines.
274  */
275 #include "version.h"
276 
277 /* values for vv_flags: */
278 #define VV_COMPAT	1	/* compatible, also used without "v:" */
279 #define VV_RO		2	/* read-only */
280 #define VV_RO_SBX	4	/* read-only in the sandbox */
281 
282 #define VV_NAME(s, t)	s, {{t}}, {0}
283 
284 static struct vimvar
285 {
286     char	*vv_name;	/* name of variable, without v: */
287     dictitem_T	vv_di;		/* value and name for key */
288     char	vv_filler[16];	/* space for LONGEST name below!!! */
289     char	vv_flags;	/* VV_COMPAT, VV_RO, VV_RO_SBX */
290 } vimvars[VV_LEN] =
291 {
292     /*
293      * The order here must match the VV_ defines in vim.h!
294      * Initializing a union does not work, leave tv.vval empty to get zero's.
295      */
296     {VV_NAME("count",		 VAR_NUMBER), VV_COMPAT+VV_RO},
297     {VV_NAME("count1",		 VAR_NUMBER), VV_RO},
298     {VV_NAME("prevcount",	 VAR_NUMBER), VV_RO},
299     {VV_NAME("errmsg",		 VAR_STRING), VV_COMPAT},
300     {VV_NAME("warningmsg",	 VAR_STRING), 0},
301     {VV_NAME("statusmsg",	 VAR_STRING), 0},
302     {VV_NAME("shell_error",	 VAR_NUMBER), VV_COMPAT+VV_RO},
303     {VV_NAME("this_session",	 VAR_STRING), VV_COMPAT},
304     {VV_NAME("version",		 VAR_NUMBER), VV_COMPAT+VV_RO},
305     {VV_NAME("lnum",		 VAR_NUMBER), VV_RO_SBX},
306     {VV_NAME("termresponse",	 VAR_STRING), VV_RO},
307     {VV_NAME("fname",		 VAR_STRING), VV_RO},
308     {VV_NAME("lang",		 VAR_STRING), VV_RO},
309     {VV_NAME("lc_time",		 VAR_STRING), VV_RO},
310     {VV_NAME("ctype",		 VAR_STRING), VV_RO},
311     {VV_NAME("charconvert_from", VAR_STRING), VV_RO},
312     {VV_NAME("charconvert_to",	 VAR_STRING), VV_RO},
313     {VV_NAME("fname_in",	 VAR_STRING), VV_RO},
314     {VV_NAME("fname_out",	 VAR_STRING), VV_RO},
315     {VV_NAME("fname_new",	 VAR_STRING), VV_RO},
316     {VV_NAME("fname_diff",	 VAR_STRING), VV_RO},
317     {VV_NAME("cmdarg",		 VAR_STRING), VV_RO},
318     {VV_NAME("foldstart",	 VAR_NUMBER), VV_RO_SBX},
319     {VV_NAME("foldend",		 VAR_NUMBER), VV_RO_SBX},
320     {VV_NAME("folddashes",	 VAR_STRING), VV_RO_SBX},
321     {VV_NAME("foldlevel",	 VAR_NUMBER), VV_RO_SBX},
322     {VV_NAME("progname",	 VAR_STRING), VV_RO},
323     {VV_NAME("servername",	 VAR_STRING), VV_RO},
324     {VV_NAME("dying",		 VAR_NUMBER), VV_RO},
325     {VV_NAME("exception",	 VAR_STRING), VV_RO},
326     {VV_NAME("throwpoint",	 VAR_STRING), VV_RO},
327     {VV_NAME("register",	 VAR_STRING), VV_RO},
328     {VV_NAME("cmdbang",		 VAR_NUMBER), VV_RO},
329     {VV_NAME("insertmode",	 VAR_STRING), VV_RO},
330     {VV_NAME("val",		 VAR_UNKNOWN), VV_RO},
331     {VV_NAME("key",		 VAR_UNKNOWN), VV_RO},
332     {VV_NAME("profiling",	 VAR_NUMBER), VV_RO},
333     {VV_NAME("fcs_reason",	 VAR_STRING), VV_RO},
334     {VV_NAME("fcs_choice",	 VAR_STRING), 0},
335     {VV_NAME("beval_bufnr",	 VAR_NUMBER), VV_RO},
336     {VV_NAME("beval_winnr",	 VAR_NUMBER), VV_RO},
337     {VV_NAME("beval_lnum",	 VAR_NUMBER), VV_RO},
338     {VV_NAME("beval_col",	 VAR_NUMBER), VV_RO},
339     {VV_NAME("beval_text",	 VAR_STRING), VV_RO},
340     {VV_NAME("scrollstart",	 VAR_STRING), 0},
341     {VV_NAME("swapname",	 VAR_STRING), VV_RO},
342     {VV_NAME("swapchoice",	 VAR_STRING), 0},
343     {VV_NAME("swapcommand",	 VAR_STRING), VV_RO},
344     {VV_NAME("char",		 VAR_STRING), VV_RO},
345 };
346 
347 /* shorthand */
348 #define vv_type	vv_di.di_tv.v_type
349 #define vv_nr	vv_di.di_tv.vval.v_number
350 #define vv_str	vv_di.di_tv.vval.v_string
351 #define vv_tv	vv_di.di_tv
352 
353 /*
354  * The v: variables are stored in dictionary "vimvardict".
355  * "vimvars_var" is the variable that is used for the "l:" scope.
356  */
357 static dict_T		vimvardict;
358 static dictitem_T	vimvars_var;
359 #define vimvarht  vimvardict.dv_hashtab
360 
361 static void prepare_vimvar __ARGS((int idx, typval_T *save_tv));
362 static void restore_vimvar __ARGS((int idx, typval_T *save_tv));
363 #if defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)
364 static int call_vim_function __ARGS((char_u *func, int argc, char_u **argv, int safe, typval_T *rettv));
365 #endif
366 static int ex_let_vars __ARGS((char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars));
367 static char_u *skip_var_list __ARGS((char_u *arg, int *var_count, int *semicolon));
368 static char_u *skip_var_one __ARGS((char_u *arg));
369 static void list_hashtable_vars __ARGS((hashtab_T *ht, char_u *prefix, int empty));
370 static void list_glob_vars __ARGS((void));
371 static void list_buf_vars __ARGS((void));
372 static void list_win_vars __ARGS((void));
373 #ifdef FEAT_WINDOWS
374 static void list_tab_vars __ARGS((void));
375 #endif
376 static void list_vim_vars __ARGS((void));
377 static void list_script_vars __ARGS((void));
378 static void list_func_vars __ARGS((void));
379 static char_u *list_arg_vars __ARGS((exarg_T *eap, char_u *arg));
380 static char_u *ex_let_one __ARGS((char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op));
381 static int check_changedtick __ARGS((char_u *arg));
382 static char_u *get_lval __ARGS((char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int quiet, int fne_flags));
383 static void clear_lval __ARGS((lval_T *lp));
384 static void set_var_lval __ARGS((lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op));
385 static int tv_op __ARGS((typval_T *tv1, typval_T *tv2, char_u  *op));
386 static void list_add_watch __ARGS((list_T *l, listwatch_T *lw));
387 static void list_rem_watch __ARGS((list_T *l, listwatch_T *lwrem));
388 static void list_fix_watch __ARGS((list_T *l, listitem_T *item));
389 static void ex_unletlock __ARGS((exarg_T *eap, char_u *argstart, int deep));
390 static int do_unlet_var __ARGS((lval_T *lp, char_u *name_end, int forceit));
391 static int do_lock_var __ARGS((lval_T *lp, char_u *name_end, int deep, int lock));
392 static void item_lock __ARGS((typval_T *tv, int deep, int lock));
393 static int tv_islocked __ARGS((typval_T *tv));
394 
395 static int eval0 __ARGS((char_u *arg,  typval_T *rettv, char_u **nextcmd, int evaluate));
396 static int eval1 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
397 static int eval2 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
398 static int eval3 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
399 static int eval4 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
400 static int eval5 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
401 static int eval6 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
402 static int eval7 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
403 
404 static int eval_index __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
405 static int get_option_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
406 static int get_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
407 static int get_lit_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
408 static int get_list_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
409 static int rettv_list_alloc __ARGS((typval_T *rettv));
410 static listitem_T *listitem_alloc __ARGS((void));
411 static void listitem_free __ARGS((listitem_T *item));
412 static void listitem_remove __ARGS((list_T *l, listitem_T *item));
413 static long list_len __ARGS((list_T *l));
414 static int list_equal __ARGS((list_T *l1, list_T *l2, int ic));
415 static int dict_equal __ARGS((dict_T *d1, dict_T *d2, int ic));
416 static int tv_equal __ARGS((typval_T *tv1, typval_T *tv2, int ic));
417 static listitem_T *list_find __ARGS((list_T *l, long n));
418 static long list_find_nr __ARGS((list_T *l, long idx, int *errorp));
419 static long list_idx_of_item __ARGS((list_T *l, listitem_T *item));
420 static void list_append __ARGS((list_T *l, listitem_T *item));
421 static int list_append_tv __ARGS((list_T *l, typval_T *tv));
422 static int list_append_string __ARGS((list_T *l, char_u *str, int len));
423 static int list_append_number __ARGS((list_T *l, varnumber_T n));
424 static int list_insert_tv __ARGS((list_T *l, typval_T *tv, listitem_T *item));
425 static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
426 static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
427 static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
428 static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
429 static char_u *list2string __ARGS((typval_T *tv, int copyID));
430 static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo, int copyID));
431 static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
432 static void set_ref_in_list __ARGS((list_T *l, int copyID));
433 static void set_ref_in_item __ARGS((typval_T *tv, int copyID));
434 static void dict_unref __ARGS((dict_T *d));
435 static void dict_free __ARGS((dict_T *d));
436 static dictitem_T *dictitem_alloc __ARGS((char_u *key));
437 static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
438 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
439 static void dictitem_free __ARGS((dictitem_T *item));
440 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
441 static int dict_add __ARGS((dict_T *d, dictitem_T *item));
442 static long dict_len __ARGS((dict_T *d));
443 static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
444 static char_u *dict2string __ARGS((typval_T *tv, int copyID));
445 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
446 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
447 static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
448 static char_u *string_quote __ARGS((char_u *str, int function));
449 static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
450 static int find_internal_func __ARGS((char_u *name));
451 static char_u *deref_func_name __ARGS((char_u *name, int *lenp));
452 static int get_func_tv __ARGS((char_u *name, int len, typval_T *rettv, char_u **arg, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, dict_T *selfdict));
453 static int call_func __ARGS((char_u *name, int len, typval_T *rettv, int argcount, typval_T *argvars, linenr_T firstline, linenr_T lastline, int *doesrange, int evaluate, dict_T *selfdict));
454 static void emsg_funcname __ARGS((char *msg, char_u *name));
455 
456 static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
457 static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
458 static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
459 static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
460 static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
461 static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
462 static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
463 static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
464 static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
465 static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
466 static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
467 static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
468 static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
469 static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
470 static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
472 static void f_changenr __ARGS((typval_T *argvars, typval_T *rettv));
473 static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
476 #if defined(FEAT_INS_EXPAND)
477 static void f_complete __ARGS((typval_T *argvars, typval_T *rettv));
478 static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
480 #endif
481 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
482 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
486 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_feedkeys __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_getcmdtype __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_getpos __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_gettabwinvar __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_inputlist __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
558 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
559 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
560 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
561 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
562 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
563 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
564 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
565 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_matcharg __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
582 #ifdef vim_mkdir
583 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
584 #endif
585 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_pathshorten __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_pumvisible __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
594 static void f_reltime __ARGS((typval_T *argvars, typval_T *rettv));
595 static void f_reltimestr __ARGS((typval_T *argvars, typval_T *rettv));
596 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_searchdecl __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_searchpairpos __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_searchpos __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_setloclist __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_setpos __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_settabwinvar __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_str2nr __ARGS((typval_T *argvars, typval_T *rettv));
629 #ifdef HAVE_STRFTIME
630 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
631 #endif
632 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
633 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
634 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
635 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
636 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
637 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
638 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
639 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
640 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
641 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
642 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
643 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
644 static void f_tabpagebuflist __ARGS((typval_T *argvars, typval_T *rettv));
645 static void f_tabpagenr __ARGS((typval_T *argvars, typval_T *rettv));
646 static void f_tabpagewinnr __ARGS((typval_T *argvars, typval_T *rettv));
647 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
648 static void f_tagfiles __ARGS((typval_T *argvars, typval_T *rettv));
649 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
650 static void f_test __ARGS((typval_T *argvars, typval_T *rettv));
651 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
652 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
653 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
654 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
655 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
656 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
657 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
658 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
659 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
660 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
661 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
662 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
663 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
664 static void f_winrestview __ARGS((typval_T *argvars, typval_T *rettv));
665 static void f_winsaveview __ARGS((typval_T *argvars, typval_T *rettv));
666 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
667 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
668 
669 static int list2fpos __ARGS((typval_T *arg, pos_T *posp, int *fnump));
670 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum, int *fnum));
671 static int get_env_len __ARGS((char_u **arg));
672 static int get_id_len __ARGS((char_u **arg));
673 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
674 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
675 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
676 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
677 				   valid character */
678 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
679 static int eval_isnamec __ARGS((int c));
680 static int eval_isnamec1 __ARGS((int c));
681 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
682 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
683 static typval_T *alloc_tv __ARGS((void));
684 static typval_T *alloc_string_tv __ARGS((char_u *string));
685 static void init_tv __ARGS((typval_T *varp));
686 static long get_tv_number __ARGS((typval_T *varp));
687 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
688 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
689 static char_u *get_tv_string __ARGS((typval_T *varp));
690 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
691 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
692 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
693 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
694 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
695 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
696 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
697 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
698 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
699 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
700 static int var_check_ro __ARGS((int flags, char_u *name));
701 static int tv_check_lock __ARGS((int lock, char_u *name));
702 static void copy_tv __ARGS((typval_T *from, typval_T *to));
703 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
704 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
705 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
706 static int eval_fname_script __ARGS((char_u *p));
707 static int eval_fname_sid __ARGS((char_u *p));
708 static void list_func_head __ARGS((ufunc_T *fp, int indent));
709 static ufunc_T *find_func __ARGS((char_u *name));
710 static int function_exists __ARGS((char_u *name));
711 static int builtin_function __ARGS((char_u *name));
712 #ifdef FEAT_PROFILE
713 static void func_do_profile __ARGS((ufunc_T *fp));
714 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
715 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
716 static int
717 # ifdef __BORLANDC__
718     _RTLENTRYF
719 # endif
720 	prof_total_cmp __ARGS((const void *s1, const void *s2));
721 static int
722 # ifdef __BORLANDC__
723     _RTLENTRYF
724 # endif
725 	prof_self_cmp __ARGS((const void *s1, const void *s2));
726 #endif
727 static int script_autoload __ARGS((char_u *name, int reload));
728 static char_u *autoload_name __ARGS((char_u *name));
729 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
730 static void func_free __ARGS((ufunc_T *fp));
731 static void func_unref __ARGS((char_u *name));
732 static void func_ref __ARGS((char_u *name));
733 static void call_user_func __ARGS((ufunc_T *fp, int argcount, typval_T *argvars, typval_T *rettv, linenr_T firstline, linenr_T lastline, dict_T *selfdict));
734 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
735 static win_T *find_win_by_nr __ARGS((typval_T *vp, tabpage_T *tp));
736 static void getwinvar __ARGS((typval_T *argvars, typval_T *rettv, int off));
737 static int searchpair_cmn __ARGS((typval_T *argvars, pos_T *match_pos));
738 static int search_cmn __ARGS((typval_T *argvars, pos_T *match_pos, int *flagsp));
739 static void setwinvar __ARGS((typval_T *argvars, typval_T *rettv, int off));
740 
741 /* Character used as separated in autoload function/variable names. */
742 #define AUTOLOAD_CHAR '#'
743 
744 /*
745  * Initialize the global and v: variables.
746  */
747     void
748 eval_init()
749 {
750     int		    i;
751     struct vimvar   *p;
752 
753     init_var_dict(&globvardict, &globvars_var);
754     init_var_dict(&vimvardict, &vimvars_var);
755     hash_init(&compat_hashtab);
756     hash_init(&func_hashtab);
757 
758     for (i = 0; i < VV_LEN; ++i)
759     {
760 	p = &vimvars[i];
761 	STRCPY(p->vv_di.di_key, p->vv_name);
762 	if (p->vv_flags & VV_RO)
763 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
764 	else if (p->vv_flags & VV_RO_SBX)
765 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
766 	else
767 	    p->vv_di.di_flags = DI_FLAGS_FIX;
768 
769 	/* add to v: scope dict, unless the value is not always available */
770 	if (p->vv_type != VAR_UNKNOWN)
771 	    hash_add(&vimvarht, p->vv_di.di_key);
772 	if (p->vv_flags & VV_COMPAT)
773 	    /* add to compat scope dict */
774 	    hash_add(&compat_hashtab, p->vv_di.di_key);
775     }
776 }
777 
778 #if defined(EXITFREE) || defined(PROTO)
779     void
780 eval_clear()
781 {
782     int		    i;
783     struct vimvar   *p;
784 
785     for (i = 0; i < VV_LEN; ++i)
786     {
787 	p = &vimvars[i];
788 	if (p->vv_di.di_tv.v_type == VAR_STRING)
789 	{
790 	    vim_free(p->vv_di.di_tv.vval.v_string);
791 	    p->vv_di.di_tv.vval.v_string = NULL;
792 	}
793     }
794     hash_clear(&vimvarht);
795     hash_clear(&compat_hashtab);
796 
797     /* script-local variables */
798     for (i = 1; i <= ga_scripts.ga_len; ++i)
799 	vars_clear(&SCRIPT_VARS(i));
800     ga_clear(&ga_scripts);
801     free_scriptnames();
802 
803     /* global variables */
804     vars_clear(&globvarht);
805 
806     /* functions */
807     free_all_functions();
808     hash_clear(&func_hashtab);
809 
810     /* unreferenced lists and dicts */
811     (void)garbage_collect();
812 }
813 #endif
814 
815 /*
816  * Return the name of the executed function.
817  */
818     char_u *
819 func_name(cookie)
820     void *cookie;
821 {
822     return ((funccall_T *)cookie)->func->uf_name;
823 }
824 
825 /*
826  * Return the address holding the next breakpoint line for a funccall cookie.
827  */
828     linenr_T *
829 func_breakpoint(cookie)
830     void *cookie;
831 {
832     return &((funccall_T *)cookie)->breakpoint;
833 }
834 
835 /*
836  * Return the address holding the debug tick for a funccall cookie.
837  */
838     int *
839 func_dbg_tick(cookie)
840     void *cookie;
841 {
842     return &((funccall_T *)cookie)->dbg_tick;
843 }
844 
845 /*
846  * Return the nesting level for a funccall cookie.
847  */
848     int
849 func_level(cookie)
850     void *cookie;
851 {
852     return ((funccall_T *)cookie)->level;
853 }
854 
855 /* pointer to funccal for currently active function */
856 funccall_T *current_funccal = NULL;
857 
858 /*
859  * Return TRUE when a function was ended by a ":return" command.
860  */
861     int
862 current_func_returned()
863 {
864     return current_funccal->returned;
865 }
866 
867 
868 /*
869  * Set an internal variable to a string value. Creates the variable if it does
870  * not already exist.
871  */
872     void
873 set_internal_string_var(name, value)
874     char_u	*name;
875     char_u	*value;
876 {
877     char_u	*val;
878     typval_T	*tvp;
879 
880     val = vim_strsave(value);
881     if (val != NULL)
882     {
883 	tvp = alloc_string_tv(val);
884 	if (tvp != NULL)
885 	{
886 	    set_var(name, tvp, FALSE);
887 	    free_tv(tvp);
888 	}
889     }
890 }
891 
892 static lval_T	*redir_lval = NULL;
893 static char_u	*redir_endp = NULL;
894 static char_u	*redir_varname = NULL;
895 
896 /*
897  * Start recording command output to a variable
898  * Returns OK if successfully completed the setup.  FAIL otherwise.
899  */
900     int
901 var_redir_start(name, append)
902     char_u	*name;
903     int		append;		/* append to an existing variable */
904 {
905     int		save_emsg;
906     int		err;
907     typval_T	tv;
908 
909     /* Make sure a valid variable name is specified */
910     if (!eval_isnamec1(*name))
911     {
912 	EMSG(_(e_invarg));
913 	return FAIL;
914     }
915 
916     redir_varname = vim_strsave(name);
917     if (redir_varname == NULL)
918 	return FAIL;
919 
920     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
921     if (redir_lval == NULL)
922     {
923 	var_redir_stop();
924 	return FAIL;
925     }
926 
927     /* Parse the variable name (can be a dict or list entry). */
928     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
929 							     FNE_CHECK_START);
930     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
931     {
932 	if (redir_endp != NULL && *redir_endp != NUL)
933 	    /* Trailing characters are present after the variable name */
934 	    EMSG(_(e_trailing));
935 	else
936 	    EMSG(_(e_invarg));
937 	var_redir_stop();
938 	return FAIL;
939     }
940 
941     /* check if we can write to the variable: set it to or append an empty
942      * string */
943     save_emsg = did_emsg;
944     did_emsg = FALSE;
945     tv.v_type = VAR_STRING;
946     tv.vval.v_string = (char_u *)"";
947     if (append)
948 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
949     else
950 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
951     err = did_emsg;
952     did_emsg |= save_emsg;
953     if (err)
954     {
955 	var_redir_stop();
956 	return FAIL;
957     }
958     if (redir_lval->ll_newkey != NULL)
959     {
960 	/* Dictionary item was created, don't do it again. */
961 	vim_free(redir_lval->ll_newkey);
962 	redir_lval->ll_newkey = NULL;
963     }
964 
965     return OK;
966 }
967 
968 /*
969  * Append "value[len]" to the variable set by var_redir_start().
970  */
971     void
972 var_redir_str(value, len)
973     char_u	*value;
974     int		len;
975 {
976     char_u	*val;
977     typval_T	tv;
978     int		save_emsg;
979     int		err;
980 
981     if (redir_lval == NULL)
982 	return;
983 
984     if (len == -1)
985 	/* Append the entire string */
986 	val = vim_strsave(value);
987     else
988 	/* Append only the specified number of characters */
989 	val = vim_strnsave(value, len);
990     if (val == NULL)
991 	return;
992 
993     tv.v_type = VAR_STRING;
994     tv.vval.v_string = val;
995 
996     save_emsg = did_emsg;
997     did_emsg = FALSE;
998     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
999     err = did_emsg;
1000     did_emsg |= save_emsg;
1001     if (err)
1002 	var_redir_stop();
1003 
1004     vim_free(tv.vval.v_string);
1005 }
1006 
1007 /*
1008  * Stop redirecting command output to a variable.
1009  */
1010     void
1011 var_redir_stop()
1012 {
1013     if (redir_lval != NULL)
1014     {
1015 	clear_lval(redir_lval);
1016 	vim_free(redir_lval);
1017 	redir_lval = NULL;
1018     }
1019     vim_free(redir_varname);
1020     redir_varname = NULL;
1021 }
1022 
1023 # if defined(FEAT_MBYTE) || defined(PROTO)
1024     int
1025 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
1026     char_u	*enc_from;
1027     char_u	*enc_to;
1028     char_u	*fname_from;
1029     char_u	*fname_to;
1030 {
1031     int		err = FALSE;
1032 
1033     set_vim_var_string(VV_CC_FROM, enc_from, -1);
1034     set_vim_var_string(VV_CC_TO, enc_to, -1);
1035     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
1036     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
1037     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
1038 	err = TRUE;
1039     set_vim_var_string(VV_CC_FROM, NULL, -1);
1040     set_vim_var_string(VV_CC_TO, NULL, -1);
1041     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1042     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1043 
1044     if (err)
1045 	return FAIL;
1046     return OK;
1047 }
1048 # endif
1049 
1050 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1051     int
1052 eval_printexpr(fname, args)
1053     char_u	*fname;
1054     char_u	*args;
1055 {
1056     int		err = FALSE;
1057 
1058     set_vim_var_string(VV_FNAME_IN, fname, -1);
1059     set_vim_var_string(VV_CMDARG, args, -1);
1060     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1061 	err = TRUE;
1062     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1063     set_vim_var_string(VV_CMDARG, NULL, -1);
1064 
1065     if (err)
1066     {
1067 	mch_remove(fname);
1068 	return FAIL;
1069     }
1070     return OK;
1071 }
1072 # endif
1073 
1074 # if defined(FEAT_DIFF) || defined(PROTO)
1075     void
1076 eval_diff(origfile, newfile, outfile)
1077     char_u	*origfile;
1078     char_u	*newfile;
1079     char_u	*outfile;
1080 {
1081     int		err = FALSE;
1082 
1083     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1084     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1085     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1086     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1087     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1088     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1089     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1090 }
1091 
1092     void
1093 eval_patch(origfile, difffile, outfile)
1094     char_u	*origfile;
1095     char_u	*difffile;
1096     char_u	*outfile;
1097 {
1098     int		err;
1099 
1100     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1101     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1102     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1103     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1104     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1105     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1106     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1107 }
1108 # endif
1109 
1110 /*
1111  * Top level evaluation function, returning a boolean.
1112  * Sets "error" to TRUE if there was an error.
1113  * Return TRUE or FALSE.
1114  */
1115     int
1116 eval_to_bool(arg, error, nextcmd, skip)
1117     char_u	*arg;
1118     int		*error;
1119     char_u	**nextcmd;
1120     int		skip;	    /* only parse, don't execute */
1121 {
1122     typval_T	tv;
1123     int		retval = FALSE;
1124 
1125     if (skip)
1126 	++emsg_skip;
1127     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1128 	*error = TRUE;
1129     else
1130     {
1131 	*error = FALSE;
1132 	if (!skip)
1133 	{
1134 	    retval = (get_tv_number_chk(&tv, error) != 0);
1135 	    clear_tv(&tv);
1136 	}
1137     }
1138     if (skip)
1139 	--emsg_skip;
1140 
1141     return retval;
1142 }
1143 
1144 /*
1145  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1146  * only parsing to "nextcmd" is done, without reporting errors.  Return
1147  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1148  */
1149     char_u *
1150 eval_to_string_skip(arg, nextcmd, skip)
1151     char_u	*arg;
1152     char_u	**nextcmd;
1153     int		skip;	    /* only parse, don't execute */
1154 {
1155     typval_T	tv;
1156     char_u	*retval;
1157 
1158     if (skip)
1159 	++emsg_skip;
1160     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1161 	retval = NULL;
1162     else
1163     {
1164 	retval = vim_strsave(get_tv_string(&tv));
1165 	clear_tv(&tv);
1166     }
1167     if (skip)
1168 	--emsg_skip;
1169 
1170     return retval;
1171 }
1172 
1173 /*
1174  * Skip over an expression at "*pp".
1175  * Return FAIL for an error, OK otherwise.
1176  */
1177     int
1178 skip_expr(pp)
1179     char_u	**pp;
1180 {
1181     typval_T	rettv;
1182 
1183     *pp = skipwhite(*pp);
1184     return eval1(pp, &rettv, FALSE);
1185 }
1186 
1187 /*
1188  * Top level evaluation function, returning a string.
1189  * Return pointer to allocated memory, or NULL for failure.
1190  */
1191     char_u *
1192 eval_to_string(arg, nextcmd, dolist)
1193     char_u	*arg;
1194     char_u	**nextcmd;
1195     int		dolist;		/* turn List into sequence of lines */
1196 {
1197     typval_T	tv;
1198     char_u	*retval;
1199     garray_T	ga;
1200 
1201     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1202 	retval = NULL;
1203     else
1204     {
1205 	if (dolist && tv.v_type == VAR_LIST)
1206 	{
1207 	    ga_init2(&ga, (int)sizeof(char), 80);
1208 	    list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, 0);
1209 	    ga_append(&ga, NUL);
1210 	    retval = (char_u *)ga.ga_data;
1211 	}
1212 	else
1213 	    retval = vim_strsave(get_tv_string(&tv));
1214 	clear_tv(&tv);
1215     }
1216 
1217     return retval;
1218 }
1219 
1220 /*
1221  * Call eval_to_string() without using current local variables and using
1222  * textlock.  When "use_sandbox" is TRUE use the sandbox.
1223  */
1224     char_u *
1225 eval_to_string_safe(arg, nextcmd, use_sandbox)
1226     char_u	*arg;
1227     char_u	**nextcmd;
1228     int		use_sandbox;
1229 {
1230     char_u	*retval;
1231     void	*save_funccalp;
1232 
1233     save_funccalp = save_funccal();
1234     if (use_sandbox)
1235 	++sandbox;
1236     ++textlock;
1237     retval = eval_to_string(arg, nextcmd, FALSE);
1238     if (use_sandbox)
1239 	--sandbox;
1240     --textlock;
1241     restore_funccal(save_funccalp);
1242     return retval;
1243 }
1244 
1245 /*
1246  * Top level evaluation function, returning a number.
1247  * Evaluates "expr" silently.
1248  * Returns -1 for an error.
1249  */
1250     int
1251 eval_to_number(expr)
1252     char_u	*expr;
1253 {
1254     typval_T	rettv;
1255     int		retval;
1256     char_u	*p = skipwhite(expr);
1257 
1258     ++emsg_off;
1259 
1260     if (eval1(&p, &rettv, TRUE) == FAIL)
1261 	retval = -1;
1262     else
1263     {
1264 	retval = get_tv_number_chk(&rettv, NULL);
1265 	clear_tv(&rettv);
1266     }
1267     --emsg_off;
1268 
1269     return retval;
1270 }
1271 
1272 /*
1273  * Prepare v: variable "idx" to be used.
1274  * Save the current typeval in "save_tv".
1275  * When not used yet add the variable to the v: hashtable.
1276  */
1277     static void
1278 prepare_vimvar(idx, save_tv)
1279     int		idx;
1280     typval_T	*save_tv;
1281 {
1282     *save_tv = vimvars[idx].vv_tv;
1283     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1284 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1285 }
1286 
1287 /*
1288  * Restore v: variable "idx" to typeval "save_tv".
1289  * When no longer defined, remove the variable from the v: hashtable.
1290  */
1291     static void
1292 restore_vimvar(idx, save_tv)
1293     int		idx;
1294     typval_T	*save_tv;
1295 {
1296     hashitem_T	*hi;
1297 
1298     clear_tv(&vimvars[idx].vv_tv);
1299     vimvars[idx].vv_tv = *save_tv;
1300     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1301     {
1302 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1303 	if (HASHITEM_EMPTY(hi))
1304 	    EMSG2(_(e_intern2), "restore_vimvar()");
1305 	else
1306 	    hash_remove(&vimvarht, hi);
1307     }
1308 }
1309 
1310 #if defined(FEAT_SPELL) || defined(PROTO)
1311 /*
1312  * Evaluate an expression to a list with suggestions.
1313  * For the "expr:" part of 'spellsuggest'.
1314  */
1315     list_T *
1316 eval_spell_expr(badword, expr)
1317     char_u	*badword;
1318     char_u	*expr;
1319 {
1320     typval_T	save_val;
1321     typval_T	rettv;
1322     list_T	*list = NULL;
1323     char_u	*p = skipwhite(expr);
1324 
1325     /* Set "v:val" to the bad word. */
1326     prepare_vimvar(VV_VAL, &save_val);
1327     vimvars[VV_VAL].vv_type = VAR_STRING;
1328     vimvars[VV_VAL].vv_str = badword;
1329     if (p_verbose == 0)
1330 	++emsg_off;
1331 
1332     if (eval1(&p, &rettv, TRUE) == OK)
1333     {
1334 	if (rettv.v_type != VAR_LIST)
1335 	    clear_tv(&rettv);
1336 	else
1337 	    list = rettv.vval.v_list;
1338     }
1339 
1340     if (p_verbose == 0)
1341 	--emsg_off;
1342     vimvars[VV_VAL].vv_str = NULL;
1343     restore_vimvar(VV_VAL, &save_val);
1344 
1345     return list;
1346 }
1347 
1348 /*
1349  * "list" is supposed to contain two items: a word and a number.  Return the
1350  * word in "pp" and the number as the return value.
1351  * Return -1 if anything isn't right.
1352  * Used to get the good word and score from the eval_spell_expr() result.
1353  */
1354     int
1355 get_spellword(list, pp)
1356     list_T	*list;
1357     char_u	**pp;
1358 {
1359     listitem_T	*li;
1360 
1361     li = list->lv_first;
1362     if (li == NULL)
1363 	return -1;
1364     *pp = get_tv_string(&li->li_tv);
1365 
1366     li = li->li_next;
1367     if (li == NULL)
1368 	return -1;
1369     return get_tv_number(&li->li_tv);
1370 }
1371 #endif
1372 
1373 /*
1374  * Top level evaluation function.
1375  * Returns an allocated typval_T with the result.
1376  * Returns NULL when there is an error.
1377  */
1378     typval_T *
1379 eval_expr(arg, nextcmd)
1380     char_u	*arg;
1381     char_u	**nextcmd;
1382 {
1383     typval_T	*tv;
1384 
1385     tv = (typval_T *)alloc(sizeof(typval_T));
1386     if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
1387     {
1388 	vim_free(tv);
1389 	tv = NULL;
1390     }
1391 
1392     return tv;
1393 }
1394 
1395 
1396 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1397 /*
1398  * Call some vimL function and return the result in "*rettv".
1399  * Uses argv[argc] for the function arguments.
1400  * Returns OK or FAIL.
1401  */
1402     static int
1403 call_vim_function(func, argc, argv, safe, rettv)
1404     char_u      *func;
1405     int		argc;
1406     char_u      **argv;
1407     int		safe;		/* use the sandbox */
1408     typval_T	*rettv;
1409 {
1410     typval_T	*argvars;
1411     long	n;
1412     int		len;
1413     int		i;
1414     int		doesrange;
1415     void	*save_funccalp = NULL;
1416     int		ret;
1417 
1418     argvars = (typval_T *)alloc((unsigned)((argc + 1) * sizeof(typval_T)));
1419     if (argvars == NULL)
1420 	return FAIL;
1421 
1422     for (i = 0; i < argc; i++)
1423     {
1424 	/* Pass a NULL or empty argument as an empty string */
1425 	if (argv[i] == NULL || *argv[i] == NUL)
1426 	{
1427 	    argvars[i].v_type = VAR_STRING;
1428 	    argvars[i].vval.v_string = (char_u *)"";
1429 	    continue;
1430 	}
1431 
1432 	/* Recognize a number argument, the others must be strings. */
1433 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1434 	if (len != 0 && len == (int)STRLEN(argv[i]))
1435 	{
1436 	    argvars[i].v_type = VAR_NUMBER;
1437 	    argvars[i].vval.v_number = n;
1438 	}
1439 	else
1440 	{
1441 	    argvars[i].v_type = VAR_STRING;
1442 	    argvars[i].vval.v_string = argv[i];
1443 	}
1444     }
1445 
1446     if (safe)
1447     {
1448 	save_funccalp = save_funccal();
1449 	++sandbox;
1450     }
1451 
1452     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1453     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1454 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1455 		    &doesrange, TRUE, NULL);
1456     if (safe)
1457     {
1458 	--sandbox;
1459 	restore_funccal(save_funccalp);
1460     }
1461     vim_free(argvars);
1462 
1463     if (ret == FAIL)
1464 	clear_tv(rettv);
1465 
1466     return ret;
1467 }
1468 
1469 /*
1470  * Call vimL function "func" and return the result as a string.
1471  * Returns NULL when calling the function fails.
1472  * Uses argv[argc] for the function arguments.
1473  */
1474     void *
1475 call_func_retstr(func, argc, argv, safe)
1476     char_u      *func;
1477     int		argc;
1478     char_u      **argv;
1479     int		safe;		/* use the sandbox */
1480 {
1481     typval_T	rettv;
1482     char_u	*retval;
1483 
1484     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1485 	return NULL;
1486 
1487     retval = vim_strsave(get_tv_string(&rettv));
1488     clear_tv(&rettv);
1489     return retval;
1490 }
1491 
1492 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1493 /*
1494  * Call vimL function "func" and return the result as a number.
1495  * Returns -1 when calling the function fails.
1496  * Uses argv[argc] for the function arguments.
1497  */
1498     long
1499 call_func_retnr(func, argc, argv, safe)
1500     char_u      *func;
1501     int		argc;
1502     char_u      **argv;
1503     int		safe;		/* use the sandbox */
1504 {
1505     typval_T	rettv;
1506     long	retval;
1507 
1508     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1509 	return -1;
1510 
1511     retval = get_tv_number_chk(&rettv, NULL);
1512     clear_tv(&rettv);
1513     return retval;
1514 }
1515 #endif
1516 
1517 /*
1518  * Call vimL function "func" and return the result as a list
1519  * Uses argv[argc] for the function arguments.
1520  */
1521     void *
1522 call_func_retlist(func, argc, argv, safe)
1523     char_u      *func;
1524     int		argc;
1525     char_u      **argv;
1526     int		safe;		/* use the sandbox */
1527 {
1528     typval_T	rettv;
1529 
1530     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1531 	return NULL;
1532 
1533     if (rettv.v_type != VAR_LIST)
1534     {
1535 	clear_tv(&rettv);
1536 	return NULL;
1537     }
1538 
1539     return rettv.vval.v_list;
1540 }
1541 
1542 #endif
1543 
1544 /*
1545  * Save the current function call pointer, and set it to NULL.
1546  * Used when executing autocommands and for ":source".
1547  */
1548     void *
1549 save_funccal()
1550 {
1551     funccall_T *fc = current_funccal;
1552 
1553     current_funccal = NULL;
1554     return (void *)fc;
1555 }
1556 
1557     void
1558 restore_funccal(vfc)
1559     void *vfc;
1560 {
1561     funccall_T *fc = (funccall_T *)vfc;
1562 
1563     current_funccal = fc;
1564 }
1565 
1566 #if defined(FEAT_PROFILE) || defined(PROTO)
1567 /*
1568  * Prepare profiling for entering a child or something else that is not
1569  * counted for the script/function itself.
1570  * Should always be called in pair with prof_child_exit().
1571  */
1572     void
1573 prof_child_enter(tm)
1574     proftime_T *tm;	/* place to store waittime */
1575 {
1576     funccall_T *fc = current_funccal;
1577 
1578     if (fc != NULL && fc->func->uf_profiling)
1579 	profile_start(&fc->prof_child);
1580     script_prof_save(tm);
1581 }
1582 
1583 /*
1584  * Take care of time spent in a child.
1585  * Should always be called after prof_child_enter().
1586  */
1587     void
1588 prof_child_exit(tm)
1589     proftime_T *tm;	/* where waittime was stored */
1590 {
1591     funccall_T *fc = current_funccal;
1592 
1593     if (fc != NULL && fc->func->uf_profiling)
1594     {
1595 	profile_end(&fc->prof_child);
1596 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1597 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1598 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1599     }
1600     script_prof_restore(tm);
1601 }
1602 #endif
1603 
1604 
1605 #ifdef FEAT_FOLDING
1606 /*
1607  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1608  * it in "*cp".  Doesn't give error messages.
1609  */
1610     int
1611 eval_foldexpr(arg, cp)
1612     char_u	*arg;
1613     int		*cp;
1614 {
1615     typval_T	tv;
1616     int		retval;
1617     char_u	*s;
1618     int		use_sandbox = was_set_insecurely((char_u *)"foldexpr",
1619 								   OPT_LOCAL);
1620 
1621     ++emsg_off;
1622     if (use_sandbox)
1623 	++sandbox;
1624     ++textlock;
1625     *cp = NUL;
1626     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1627 	retval = 0;
1628     else
1629     {
1630 	/* If the result is a number, just return the number. */
1631 	if (tv.v_type == VAR_NUMBER)
1632 	    retval = tv.vval.v_number;
1633 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1634 	    retval = 0;
1635 	else
1636 	{
1637 	    /* If the result is a string, check if there is a non-digit before
1638 	     * the number. */
1639 	    s = tv.vval.v_string;
1640 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1641 		*cp = *s++;
1642 	    retval = atol((char *)s);
1643 	}
1644 	clear_tv(&tv);
1645     }
1646     --emsg_off;
1647     if (use_sandbox)
1648 	--sandbox;
1649     --textlock;
1650 
1651     return retval;
1652 }
1653 #endif
1654 
1655 /*
1656  * ":let"			list all variable values
1657  * ":let var1 var2"		list variable values
1658  * ":let var = expr"		assignment command.
1659  * ":let var += expr"		assignment command.
1660  * ":let var -= expr"		assignment command.
1661  * ":let var .= expr"		assignment command.
1662  * ":let [var1, var2] = expr"	unpack list.
1663  */
1664     void
1665 ex_let(eap)
1666     exarg_T	*eap;
1667 {
1668     char_u	*arg = eap->arg;
1669     char_u	*expr = NULL;
1670     typval_T	rettv;
1671     int		i;
1672     int		var_count = 0;
1673     int		semicolon = 0;
1674     char_u	op[2];
1675     char_u	*argend;
1676 
1677     argend = skip_var_list(arg, &var_count, &semicolon);
1678     if (argend == NULL)
1679 	return;
1680     if (argend > arg && argend[-1] == '.')  /* for var.='str' */
1681 	--argend;
1682     expr = vim_strchr(argend, '=');
1683     if (expr == NULL)
1684     {
1685 	/*
1686 	 * ":let" without "=": list variables
1687 	 */
1688 	if (*arg == '[')
1689 	    EMSG(_(e_invarg));
1690 	else if (!ends_excmd(*arg))
1691 	    /* ":let var1 var2" */
1692 	    arg = list_arg_vars(eap, arg);
1693 	else if (!eap->skip)
1694 	{
1695 	    /* ":let" */
1696 	    list_glob_vars();
1697 	    list_buf_vars();
1698 	    list_win_vars();
1699 #ifdef FEAT_WINDOWS
1700 	    list_tab_vars();
1701 #endif
1702 	    list_script_vars();
1703 	    list_func_vars();
1704 	    list_vim_vars();
1705 	}
1706 	eap->nextcmd = check_nextcmd(arg);
1707     }
1708     else
1709     {
1710 	op[0] = '=';
1711 	op[1] = NUL;
1712 	if (expr > argend)
1713 	{
1714 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1715 		op[0] = expr[-1];   /* +=, -= or .= */
1716 	}
1717 	expr = skipwhite(expr + 1);
1718 
1719 	if (eap->skip)
1720 	    ++emsg_skip;
1721 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1722 	if (eap->skip)
1723 	{
1724 	    if (i != FAIL)
1725 		clear_tv(&rettv);
1726 	    --emsg_skip;
1727 	}
1728 	else if (i != FAIL)
1729 	{
1730 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1731 									  op);
1732 	    clear_tv(&rettv);
1733 	}
1734     }
1735 }
1736 
1737 /*
1738  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1739  * Handles both "var" with any type and "[var, var; var]" with a list type.
1740  * When "nextchars" is not NULL it points to a string with characters that
1741  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1742  * or concatenate.
1743  * Returns OK or FAIL;
1744  */
1745     static int
1746 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1747     char_u	*arg_start;
1748     typval_T	*tv;
1749     int		copy;		/* copy values from "tv", don't move */
1750     int		semicolon;	/* from skip_var_list() */
1751     int		var_count;	/* from skip_var_list() */
1752     char_u	*nextchars;
1753 {
1754     char_u	*arg = arg_start;
1755     list_T	*l;
1756     int		i;
1757     listitem_T	*item;
1758     typval_T	ltv;
1759 
1760     if (*arg != '[')
1761     {
1762 	/*
1763 	 * ":let var = expr" or ":for var in list"
1764 	 */
1765 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1766 	    return FAIL;
1767 	return OK;
1768     }
1769 
1770     /*
1771      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1772      */
1773     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1774     {
1775 	EMSG(_(e_listreq));
1776 	return FAIL;
1777     }
1778 
1779     i = list_len(l);
1780     if (semicolon == 0 && var_count < i)
1781     {
1782 	EMSG(_("E687: Less targets than List items"));
1783 	return FAIL;
1784     }
1785     if (var_count - semicolon > i)
1786     {
1787 	EMSG(_("E688: More targets than List items"));
1788 	return FAIL;
1789     }
1790 
1791     item = l->lv_first;
1792     while (*arg != ']')
1793     {
1794 	arg = skipwhite(arg + 1);
1795 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1796 	item = item->li_next;
1797 	if (arg == NULL)
1798 	    return FAIL;
1799 
1800 	arg = skipwhite(arg);
1801 	if (*arg == ';')
1802 	{
1803 	    /* Put the rest of the list (may be empty) in the var after ';'.
1804 	     * Create a new list for this. */
1805 	    l = list_alloc();
1806 	    if (l == NULL)
1807 		return FAIL;
1808 	    while (item != NULL)
1809 	    {
1810 		list_append_tv(l, &item->li_tv);
1811 		item = item->li_next;
1812 	    }
1813 
1814 	    ltv.v_type = VAR_LIST;
1815 	    ltv.v_lock = 0;
1816 	    ltv.vval.v_list = l;
1817 	    l->lv_refcount = 1;
1818 
1819 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1820 						    (char_u *)"]", nextchars);
1821 	    clear_tv(&ltv);
1822 	    if (arg == NULL)
1823 		return FAIL;
1824 	    break;
1825 	}
1826 	else if (*arg != ',' && *arg != ']')
1827 	{
1828 	    EMSG2(_(e_intern2), "ex_let_vars()");
1829 	    return FAIL;
1830 	}
1831     }
1832 
1833     return OK;
1834 }
1835 
1836 /*
1837  * Skip over assignable variable "var" or list of variables "[var, var]".
1838  * Used for ":let varvar = expr" and ":for varvar in expr".
1839  * For "[var, var]" increment "*var_count" for each variable.
1840  * for "[var, var; var]" set "semicolon".
1841  * Return NULL for an error.
1842  */
1843     static char_u *
1844 skip_var_list(arg, var_count, semicolon)
1845     char_u	*arg;
1846     int		*var_count;
1847     int		*semicolon;
1848 {
1849     char_u	*p, *s;
1850 
1851     if (*arg == '[')
1852     {
1853 	/* "[var, var]": find the matching ']'. */
1854 	p = arg;
1855 	for (;;)
1856 	{
1857 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1858 	    s = skip_var_one(p);
1859 	    if (s == p)
1860 	    {
1861 		EMSG2(_(e_invarg2), p);
1862 		return NULL;
1863 	    }
1864 	    ++*var_count;
1865 
1866 	    p = skipwhite(s);
1867 	    if (*p == ']')
1868 		break;
1869 	    else if (*p == ';')
1870 	    {
1871 		if (*semicolon == 1)
1872 		{
1873 		    EMSG(_("Double ; in list of variables"));
1874 		    return NULL;
1875 		}
1876 		*semicolon = 1;
1877 	    }
1878 	    else if (*p != ',')
1879 	    {
1880 		EMSG2(_(e_invarg2), p);
1881 		return NULL;
1882 	    }
1883 	}
1884 	return p + 1;
1885     }
1886     else
1887 	return skip_var_one(arg);
1888 }
1889 
1890 /*
1891  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1892  * l[idx].
1893  */
1894     static char_u *
1895 skip_var_one(arg)
1896     char_u	*arg;
1897 {
1898     if (*arg == '@' && arg[1] != NUL)
1899 	return arg + 2;
1900     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1901 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1902 }
1903 
1904 /*
1905  * List variables for hashtab "ht" with prefix "prefix".
1906  * If "empty" is TRUE also list NULL strings as empty strings.
1907  */
1908     static void
1909 list_hashtable_vars(ht, prefix, empty)
1910     hashtab_T	*ht;
1911     char_u	*prefix;
1912     int		empty;
1913 {
1914     hashitem_T	*hi;
1915     dictitem_T	*di;
1916     int		todo;
1917 
1918     todo = (int)ht->ht_used;
1919     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1920     {
1921 	if (!HASHITEM_EMPTY(hi))
1922 	{
1923 	    --todo;
1924 	    di = HI2DI(hi);
1925 	    if (empty || di->di_tv.v_type != VAR_STRING
1926 					   || di->di_tv.vval.v_string != NULL)
1927 		list_one_var(di, prefix);
1928 	}
1929     }
1930 }
1931 
1932 /*
1933  * List global variables.
1934  */
1935     static void
1936 list_glob_vars()
1937 {
1938     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1939 }
1940 
1941 /*
1942  * List buffer variables.
1943  */
1944     static void
1945 list_buf_vars()
1946 {
1947     char_u	numbuf[NUMBUFLEN];
1948 
1949     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1950 
1951     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1952     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1953 }
1954 
1955 /*
1956  * List window variables.
1957  */
1958     static void
1959 list_win_vars()
1960 {
1961     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1962 }
1963 
1964 #ifdef FEAT_WINDOWS
1965 /*
1966  * List tab page variables.
1967  */
1968     static void
1969 list_tab_vars()
1970 {
1971     list_hashtable_vars(&curtab->tp_vars.dv_hashtab, (char_u *)"t:", TRUE);
1972 }
1973 #endif
1974 
1975 /*
1976  * List Vim variables.
1977  */
1978     static void
1979 list_vim_vars()
1980 {
1981     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1982 }
1983 
1984 /*
1985  * List script-local variables, if there is a script.
1986  */
1987     static void
1988 list_script_vars()
1989 {
1990     if (current_SID > 0 && current_SID <= ga_scripts.ga_len)
1991 	list_hashtable_vars(&SCRIPT_VARS(current_SID), (char_u *)"s:", FALSE);
1992 }
1993 
1994 /*
1995  * List function variables, if there is a function.
1996  */
1997     static void
1998 list_func_vars()
1999 {
2000     if (current_funccal != NULL)
2001 	list_hashtable_vars(&current_funccal->l_vars.dv_hashtab,
2002 						       (char_u *)"l:", FALSE);
2003 }
2004 
2005 /*
2006  * List variables in "arg".
2007  */
2008     static char_u *
2009 list_arg_vars(eap, arg)
2010     exarg_T	*eap;
2011     char_u	*arg;
2012 {
2013     int		error = FALSE;
2014     int		len;
2015     char_u	*name;
2016     char_u	*name_start;
2017     char_u	*arg_subsc;
2018     char_u	*tofree;
2019     typval_T    tv;
2020 
2021     while (!ends_excmd(*arg) && !got_int)
2022     {
2023 	if (error || eap->skip)
2024 	{
2025 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
2026 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
2027 	    {
2028 		emsg_severe = TRUE;
2029 		EMSG(_(e_trailing));
2030 		break;
2031 	    }
2032 	}
2033 	else
2034 	{
2035 	    /* get_name_len() takes care of expanding curly braces */
2036 	    name_start = name = arg;
2037 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
2038 	    if (len <= 0)
2039 	    {
2040 		/* This is mainly to keep test 49 working: when expanding
2041 		 * curly braces fails overrule the exception error message. */
2042 		if (len < 0 && !aborting())
2043 		{
2044 		    emsg_severe = TRUE;
2045 		    EMSG2(_(e_invarg2), arg);
2046 		    break;
2047 		}
2048 		error = TRUE;
2049 	    }
2050 	    else
2051 	    {
2052 		if (tofree != NULL)
2053 		    name = tofree;
2054 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
2055 		    error = TRUE;
2056 		else
2057 		{
2058 		    /* handle d.key, l[idx], f(expr) */
2059 		    arg_subsc = arg;
2060 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
2061 			error = TRUE;
2062 		    else
2063 		    {
2064 			if (arg == arg_subsc && len == 2 && name[1] == ':')
2065 			{
2066 			    switch (*name)
2067 			    {
2068 				case 'g': list_glob_vars(); break;
2069 				case 'b': list_buf_vars(); break;
2070 				case 'w': list_win_vars(); break;
2071 #ifdef FEAT_WINDOWS
2072 				case 't': list_tab_vars(); break;
2073 #endif
2074 				case 'v': list_vim_vars(); break;
2075 				case 's': list_script_vars(); break;
2076 				case 'l': list_func_vars(); break;
2077 				default:
2078 					  EMSG2(_("E738: Can't list variables for %s"), name);
2079 			    }
2080 			}
2081 			else
2082 			{
2083 			    char_u	numbuf[NUMBUFLEN];
2084 			    char_u	*tf;
2085 			    int		c;
2086 			    char_u	*s;
2087 
2088 			    s = echo_string(&tv, &tf, numbuf, 0);
2089 			    c = *arg;
2090 			    *arg = NUL;
2091 			    list_one_var_a((char_u *)"",
2092 				    arg == arg_subsc ? name : name_start,
2093 				    tv.v_type, s == NULL ? (char_u *)"" : s);
2094 			    *arg = c;
2095 			    vim_free(tf);
2096 			}
2097 			clear_tv(&tv);
2098 		    }
2099 		}
2100 	    }
2101 
2102 	    vim_free(tofree);
2103 	}
2104 
2105 	arg = skipwhite(arg);
2106     }
2107 
2108     return arg;
2109 }
2110 
2111 /*
2112  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2113  * Returns a pointer to the char just after the var name.
2114  * Returns NULL if there is an error.
2115  */
2116     static char_u *
2117 ex_let_one(arg, tv, copy, endchars, op)
2118     char_u	*arg;		/* points to variable name */
2119     typval_T	*tv;		/* value to assign to variable */
2120     int		copy;		/* copy value from "tv" */
2121     char_u	*endchars;	/* valid chars after variable name  or NULL */
2122     char_u	*op;		/* "+", "-", "."  or NULL*/
2123 {
2124     int		c1;
2125     char_u	*name;
2126     char_u	*p;
2127     char_u	*arg_end = NULL;
2128     int		len;
2129     int		opt_flags;
2130     char_u	*tofree = NULL;
2131 
2132     /*
2133      * ":let $VAR = expr": Set environment variable.
2134      */
2135     if (*arg == '$')
2136     {
2137 	/* Find the end of the name. */
2138 	++arg;
2139 	name = arg;
2140 	len = get_env_len(&arg);
2141 	if (len == 0)
2142 	    EMSG2(_(e_invarg2), name - 1);
2143 	else
2144 	{
2145 	    if (op != NULL && (*op == '+' || *op == '-'))
2146 		EMSG2(_(e_letwrong), op);
2147 	    else if (endchars != NULL
2148 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2149 		EMSG(_(e_letunexp));
2150 	    else
2151 	    {
2152 		c1 = name[len];
2153 		name[len] = NUL;
2154 		p = get_tv_string_chk(tv);
2155 		if (p != NULL && op != NULL && *op == '.')
2156 		{
2157 		    int	    mustfree = FALSE;
2158 		    char_u  *s = vim_getenv(name, &mustfree);
2159 
2160 		    if (s != NULL)
2161 		    {
2162 			p = tofree = concat_str(s, p);
2163 			if (mustfree)
2164 			    vim_free(s);
2165 		    }
2166 		}
2167 		if (p != NULL)
2168 		{
2169 		    vim_setenv(name, p);
2170 		    if (STRICMP(name, "HOME") == 0)
2171 			init_homedir();
2172 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2173 			didset_vim = FALSE;
2174 		    else if (didset_vimruntime
2175 					&& STRICMP(name, "VIMRUNTIME") == 0)
2176 			didset_vimruntime = FALSE;
2177 		    arg_end = arg;
2178 		}
2179 		name[len] = c1;
2180 		vim_free(tofree);
2181 	    }
2182 	}
2183     }
2184 
2185     /*
2186      * ":let &option = expr": Set option value.
2187      * ":let &l:option = expr": Set local option value.
2188      * ":let &g:option = expr": Set global option value.
2189      */
2190     else if (*arg == '&')
2191     {
2192 	/* Find the end of the name. */
2193 	p = find_option_end(&arg, &opt_flags);
2194 	if (p == NULL || (endchars != NULL
2195 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2196 	    EMSG(_(e_letunexp));
2197 	else
2198 	{
2199 	    long	n;
2200 	    int		opt_type;
2201 	    long	numval;
2202 	    char_u	*stringval = NULL;
2203 	    char_u	*s;
2204 
2205 	    c1 = *p;
2206 	    *p = NUL;
2207 
2208 	    n = get_tv_number(tv);
2209 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2210 	    if (s != NULL && op != NULL && *op != '=')
2211 	    {
2212 		opt_type = get_option_value(arg, &numval,
2213 						       &stringval, opt_flags);
2214 		if ((opt_type == 1 && *op == '.')
2215 			|| (opt_type == 0 && *op != '.'))
2216 		    EMSG2(_(e_letwrong), op);
2217 		else
2218 		{
2219 		    if (opt_type == 1)  /* number */
2220 		    {
2221 			if (*op == '+')
2222 			    n = numval + n;
2223 			else
2224 			    n = numval - n;
2225 		    }
2226 		    else if (opt_type == 0 && stringval != NULL) /* string */
2227 		    {
2228 			s = concat_str(stringval, s);
2229 			vim_free(stringval);
2230 			stringval = s;
2231 		    }
2232 		}
2233 	    }
2234 	    if (s != NULL)
2235 	    {
2236 		set_option_value(arg, n, s, opt_flags);
2237 		arg_end = p;
2238 	    }
2239 	    *p = c1;
2240 	    vim_free(stringval);
2241 	}
2242     }
2243 
2244     /*
2245      * ":let @r = expr": Set register contents.
2246      */
2247     else if (*arg == '@')
2248     {
2249 	++arg;
2250 	if (op != NULL && (*op == '+' || *op == '-'))
2251 	    EMSG2(_(e_letwrong), op);
2252 	else if (endchars != NULL
2253 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2254 	    EMSG(_(e_letunexp));
2255 	else
2256 	{
2257 	    char_u	*tofree = NULL;
2258 	    char_u	*s;
2259 
2260 	    p = get_tv_string_chk(tv);
2261 	    if (p != NULL && op != NULL && *op == '.')
2262 	    {
2263 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2264 		if (s != NULL)
2265 		{
2266 		    p = tofree = concat_str(s, p);
2267 		    vim_free(s);
2268 		}
2269 	    }
2270 	    if (p != NULL)
2271 	    {
2272 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2273 		arg_end = arg + 1;
2274 	    }
2275 	    vim_free(tofree);
2276 	}
2277     }
2278 
2279     /*
2280      * ":let var = expr": Set internal variable.
2281      * ":let {expr} = expr": Idem, name made with curly braces
2282      */
2283     else if (eval_isnamec1(*arg) || *arg == '{')
2284     {
2285 	lval_T	lv;
2286 
2287 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2288 	if (p != NULL && lv.ll_name != NULL)
2289 	{
2290 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2291 		EMSG(_(e_letunexp));
2292 	    else
2293 	    {
2294 		set_var_lval(&lv, p, tv, copy, op);
2295 		arg_end = p;
2296 	    }
2297 	}
2298 	clear_lval(&lv);
2299     }
2300 
2301     else
2302 	EMSG2(_(e_invarg2), arg);
2303 
2304     return arg_end;
2305 }
2306 
2307 /*
2308  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2309  */
2310     static int
2311 check_changedtick(arg)
2312     char_u	*arg;
2313 {
2314     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2315     {
2316 	EMSG2(_(e_readonlyvar), arg);
2317 	return TRUE;
2318     }
2319     return FALSE;
2320 }
2321 
2322 /*
2323  * Get an lval: variable, Dict item or List item that can be assigned a value
2324  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2325  * "name.key", "name.key[expr]" etc.
2326  * Indexing only works if "name" is an existing List or Dictionary.
2327  * "name" points to the start of the name.
2328  * If "rettv" is not NULL it points to the value to be assigned.
2329  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2330  * wrong; must end in space or cmd separator.
2331  *
2332  * Returns a pointer to just after the name, including indexes.
2333  * When an evaluation error occurs "lp->ll_name" is NULL;
2334  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2335  */
2336     static char_u *
2337 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2338     char_u	*name;
2339     typval_T	*rettv;
2340     lval_T	*lp;
2341     int		unlet;
2342     int		skip;
2343     int		quiet;	    /* don't give error messages */
2344     int		fne_flags;  /* flags for find_name_end() */
2345 {
2346     char_u	*p;
2347     char_u	*expr_start, *expr_end;
2348     int		cc;
2349     dictitem_T	*v;
2350     typval_T	var1;
2351     typval_T	var2;
2352     int		empty1 = FALSE;
2353     listitem_T	*ni;
2354     char_u	*key = NULL;
2355     int		len;
2356     hashtab_T	*ht;
2357 
2358     /* Clear everything in "lp". */
2359     vim_memset(lp, 0, sizeof(lval_T));
2360 
2361     if (skip)
2362     {
2363 	/* When skipping just find the end of the name. */
2364 	lp->ll_name = name;
2365 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2366     }
2367 
2368     /* Find the end of the name. */
2369     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2370     if (expr_start != NULL)
2371     {
2372 	/* Don't expand the name when we already know there is an error. */
2373 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2374 						    && *p != '[' && *p != '.')
2375 	{
2376 	    EMSG(_(e_trailing));
2377 	    return NULL;
2378 	}
2379 
2380 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2381 	if (lp->ll_exp_name == NULL)
2382 	{
2383 	    /* Report an invalid expression in braces, unless the
2384 	     * expression evaluation has been cancelled due to an
2385 	     * aborting error, an interrupt, or an exception. */
2386 	    if (!aborting() && !quiet)
2387 	    {
2388 		emsg_severe = TRUE;
2389 		EMSG2(_(e_invarg2), name);
2390 		return NULL;
2391 	    }
2392 	}
2393 	lp->ll_name = lp->ll_exp_name;
2394     }
2395     else
2396 	lp->ll_name = name;
2397 
2398     /* Without [idx] or .key we are done. */
2399     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2400 	return p;
2401 
2402     cc = *p;
2403     *p = NUL;
2404     v = find_var(lp->ll_name, &ht);
2405     if (v == NULL && !quiet)
2406 	EMSG2(_(e_undefvar), lp->ll_name);
2407     *p = cc;
2408     if (v == NULL)
2409 	return NULL;
2410 
2411     /*
2412      * Loop until no more [idx] or .key is following.
2413      */
2414     lp->ll_tv = &v->di_tv;
2415     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2416     {
2417 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2418 		&& !(lp->ll_tv->v_type == VAR_DICT
2419 					   && lp->ll_tv->vval.v_dict != NULL))
2420 	{
2421 	    if (!quiet)
2422 		EMSG(_("E689: Can only index a List or Dictionary"));
2423 	    return NULL;
2424 	}
2425 	if (lp->ll_range)
2426 	{
2427 	    if (!quiet)
2428 		EMSG(_("E708: [:] must come last"));
2429 	    return NULL;
2430 	}
2431 
2432 	len = -1;
2433 	if (*p == '.')
2434 	{
2435 	    key = p + 1;
2436 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2437 		;
2438 	    if (len == 0)
2439 	    {
2440 		if (!quiet)
2441 		    EMSG(_(e_emptykey));
2442 		return NULL;
2443 	    }
2444 	    p = key + len;
2445 	}
2446 	else
2447 	{
2448 	    /* Get the index [expr] or the first index [expr: ]. */
2449 	    p = skipwhite(p + 1);
2450 	    if (*p == ':')
2451 		empty1 = TRUE;
2452 	    else
2453 	    {
2454 		empty1 = FALSE;
2455 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2456 		    return NULL;
2457 		if (get_tv_string_chk(&var1) == NULL)
2458 		{
2459 		    /* not a number or string */
2460 		    clear_tv(&var1);
2461 		    return NULL;
2462 		}
2463 	    }
2464 
2465 	    /* Optionally get the second index [ :expr]. */
2466 	    if (*p == ':')
2467 	    {
2468 		if (lp->ll_tv->v_type == VAR_DICT)
2469 		{
2470 		    if (!quiet)
2471 			EMSG(_(e_dictrange));
2472 		    if (!empty1)
2473 			clear_tv(&var1);
2474 		    return NULL;
2475 		}
2476 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2477 					       || rettv->vval.v_list == NULL))
2478 		{
2479 		    if (!quiet)
2480 			EMSG(_("E709: [:] requires a List value"));
2481 		    if (!empty1)
2482 			clear_tv(&var1);
2483 		    return NULL;
2484 		}
2485 		p = skipwhite(p + 1);
2486 		if (*p == ']')
2487 		    lp->ll_empty2 = TRUE;
2488 		else
2489 		{
2490 		    lp->ll_empty2 = FALSE;
2491 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2492 		    {
2493 			if (!empty1)
2494 			    clear_tv(&var1);
2495 			return NULL;
2496 		    }
2497 		    if (get_tv_string_chk(&var2) == NULL)
2498 		    {
2499 			/* not a number or string */
2500 			if (!empty1)
2501 			    clear_tv(&var1);
2502 			clear_tv(&var2);
2503 			return NULL;
2504 		    }
2505 		}
2506 		lp->ll_range = TRUE;
2507 	    }
2508 	    else
2509 		lp->ll_range = FALSE;
2510 
2511 	    if (*p != ']')
2512 	    {
2513 		if (!quiet)
2514 		    EMSG(_(e_missbrac));
2515 		if (!empty1)
2516 		    clear_tv(&var1);
2517 		if (lp->ll_range && !lp->ll_empty2)
2518 		    clear_tv(&var2);
2519 		return NULL;
2520 	    }
2521 
2522 	    /* Skip to past ']'. */
2523 	    ++p;
2524 	}
2525 
2526 	if (lp->ll_tv->v_type == VAR_DICT)
2527 	{
2528 	    if (len == -1)
2529 	    {
2530 		/* "[key]": get key from "var1" */
2531 		key = get_tv_string(&var1);	/* is number or string */
2532 		if (*key == NUL)
2533 		{
2534 		    if (!quiet)
2535 			EMSG(_(e_emptykey));
2536 		    clear_tv(&var1);
2537 		    return NULL;
2538 		}
2539 	    }
2540 	    lp->ll_list = NULL;
2541 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2542 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2543 	    if (lp->ll_di == NULL)
2544 	    {
2545 		/* Key does not exist in dict: may need to add it. */
2546 		if (*p == '[' || *p == '.' || unlet)
2547 		{
2548 		    if (!quiet)
2549 			EMSG2(_(e_dictkey), key);
2550 		    if (len == -1)
2551 			clear_tv(&var1);
2552 		    return NULL;
2553 		}
2554 		if (len == -1)
2555 		    lp->ll_newkey = vim_strsave(key);
2556 		else
2557 		    lp->ll_newkey = vim_strnsave(key, len);
2558 		if (len == -1)
2559 		    clear_tv(&var1);
2560 		if (lp->ll_newkey == NULL)
2561 		    p = NULL;
2562 		break;
2563 	    }
2564 	    if (len == -1)
2565 		clear_tv(&var1);
2566 	    lp->ll_tv = &lp->ll_di->di_tv;
2567 	}
2568 	else
2569 	{
2570 	    /*
2571 	     * Get the number and item for the only or first index of the List.
2572 	     */
2573 	    if (empty1)
2574 		lp->ll_n1 = 0;
2575 	    else
2576 	    {
2577 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2578 		clear_tv(&var1);
2579 	    }
2580 	    lp->ll_dict = NULL;
2581 	    lp->ll_list = lp->ll_tv->vval.v_list;
2582 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2583 	    if (lp->ll_li == NULL)
2584 	    {
2585 		if (lp->ll_n1 < 0)
2586 		{
2587 		    lp->ll_n1 = 0;
2588 		    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2589 		}
2590 	    }
2591 	    if (lp->ll_li == NULL)
2592 	    {
2593 		if (lp->ll_range && !lp->ll_empty2)
2594 		    clear_tv(&var2);
2595 		return NULL;
2596 	    }
2597 
2598 	    /*
2599 	     * May need to find the item or absolute index for the second
2600 	     * index of a range.
2601 	     * When no index given: "lp->ll_empty2" is TRUE.
2602 	     * Otherwise "lp->ll_n2" is set to the second index.
2603 	     */
2604 	    if (lp->ll_range && !lp->ll_empty2)
2605 	    {
2606 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2607 		clear_tv(&var2);
2608 		if (lp->ll_n2 < 0)
2609 		{
2610 		    ni = list_find(lp->ll_list, lp->ll_n2);
2611 		    if (ni == NULL)
2612 			return NULL;
2613 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2614 		}
2615 
2616 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2617 		if (lp->ll_n1 < 0)
2618 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2619 		if (lp->ll_n2 < lp->ll_n1)
2620 		    return NULL;
2621 	    }
2622 
2623 	    lp->ll_tv = &lp->ll_li->li_tv;
2624 	}
2625     }
2626 
2627     return p;
2628 }
2629 
2630 /*
2631  * Clear lval "lp" that was filled by get_lval().
2632  */
2633     static void
2634 clear_lval(lp)
2635     lval_T	*lp;
2636 {
2637     vim_free(lp->ll_exp_name);
2638     vim_free(lp->ll_newkey);
2639 }
2640 
2641 /*
2642  * Set a variable that was parsed by get_lval() to "rettv".
2643  * "endp" points to just after the parsed name.
2644  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2645  */
2646     static void
2647 set_var_lval(lp, endp, rettv, copy, op)
2648     lval_T	*lp;
2649     char_u	*endp;
2650     typval_T	*rettv;
2651     int		copy;
2652     char_u	*op;
2653 {
2654     int		cc;
2655     listitem_T	*ri;
2656     dictitem_T	*di;
2657 
2658     if (lp->ll_tv == NULL)
2659     {
2660 	if (!check_changedtick(lp->ll_name))
2661 	{
2662 	    cc = *endp;
2663 	    *endp = NUL;
2664 	    if (op != NULL && *op != '=')
2665 	    {
2666 		typval_T tv;
2667 
2668 		/* handle +=, -= and .= */
2669 		if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name),
2670 							     &tv, TRUE) == OK)
2671 		{
2672 		    if (tv_op(&tv, rettv, op) == OK)
2673 			set_var(lp->ll_name, &tv, FALSE);
2674 		    clear_tv(&tv);
2675 		}
2676 	    }
2677 	    else
2678 		set_var(lp->ll_name, rettv, copy);
2679 	    *endp = cc;
2680 	}
2681     }
2682     else if (tv_check_lock(lp->ll_newkey == NULL
2683 		? lp->ll_tv->v_lock
2684 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2685 	;
2686     else if (lp->ll_range)
2687     {
2688 	/*
2689 	 * Assign the List values to the list items.
2690 	 */
2691 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2692 	{
2693 	    if (op != NULL && *op != '=')
2694 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2695 	    else
2696 	    {
2697 		clear_tv(&lp->ll_li->li_tv);
2698 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2699 	    }
2700 	    ri = ri->li_next;
2701 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2702 		break;
2703 	    if (lp->ll_li->li_next == NULL)
2704 	    {
2705 		/* Need to add an empty item. */
2706 		if (list_append_number(lp->ll_list, 0) == FAIL)
2707 		{
2708 		    ri = NULL;
2709 		    break;
2710 		}
2711 	    }
2712 	    lp->ll_li = lp->ll_li->li_next;
2713 	    ++lp->ll_n1;
2714 	}
2715 	if (ri != NULL)
2716 	    EMSG(_("E710: List value has more items than target"));
2717 	else if (lp->ll_empty2
2718 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2719 		: lp->ll_n1 != lp->ll_n2)
2720 	    EMSG(_("E711: List value has not enough items"));
2721     }
2722     else
2723     {
2724 	/*
2725 	 * Assign to a List or Dictionary item.
2726 	 */
2727 	if (lp->ll_newkey != NULL)
2728 	{
2729 	    if (op != NULL && *op != '=')
2730 	    {
2731 		EMSG2(_(e_letwrong), op);
2732 		return;
2733 	    }
2734 
2735 	    /* Need to add an item to the Dictionary. */
2736 	    di = dictitem_alloc(lp->ll_newkey);
2737 	    if (di == NULL)
2738 		return;
2739 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2740 	    {
2741 		vim_free(di);
2742 		return;
2743 	    }
2744 	    lp->ll_tv = &di->di_tv;
2745 	}
2746 	else if (op != NULL && *op != '=')
2747 	{
2748 	    tv_op(lp->ll_tv, rettv, op);
2749 	    return;
2750 	}
2751 	else
2752 	    clear_tv(lp->ll_tv);
2753 
2754 	/*
2755 	 * Assign the value to the variable or list item.
2756 	 */
2757 	if (copy)
2758 	    copy_tv(rettv, lp->ll_tv);
2759 	else
2760 	{
2761 	    *lp->ll_tv = *rettv;
2762 	    lp->ll_tv->v_lock = 0;
2763 	    init_tv(rettv);
2764 	}
2765     }
2766 }
2767 
2768 /*
2769  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2770  * Returns OK or FAIL.
2771  */
2772     static int
2773 tv_op(tv1, tv2, op)
2774     typval_T *tv1;
2775     typval_T *tv2;
2776     char_u  *op;
2777 {
2778     long	n;
2779     char_u	numbuf[NUMBUFLEN];
2780     char_u	*s;
2781 
2782     /* Can't do anything with a Funcref or a Dict on the right. */
2783     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2784     {
2785 	switch (tv1->v_type)
2786 	{
2787 	    case VAR_DICT:
2788 	    case VAR_FUNC:
2789 		break;
2790 
2791 	    case VAR_LIST:
2792 		if (*op != '+' || tv2->v_type != VAR_LIST)
2793 		    break;
2794 		/* List += List */
2795 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2796 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2797 		return OK;
2798 
2799 	    case VAR_NUMBER:
2800 	    case VAR_STRING:
2801 		if (tv2->v_type == VAR_LIST)
2802 		    break;
2803 		if (*op == '+' || *op == '-')
2804 		{
2805 		    /* nr += nr  or  nr -= nr*/
2806 		    n = get_tv_number(tv1);
2807 		    if (*op == '+')
2808 			n += get_tv_number(tv2);
2809 		    else
2810 			n -= get_tv_number(tv2);
2811 		    clear_tv(tv1);
2812 		    tv1->v_type = VAR_NUMBER;
2813 		    tv1->vval.v_number = n;
2814 		}
2815 		else
2816 		{
2817 		    /* str .= str */
2818 		    s = get_tv_string(tv1);
2819 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2820 		    clear_tv(tv1);
2821 		    tv1->v_type = VAR_STRING;
2822 		    tv1->vval.v_string = s;
2823 		}
2824 		return OK;
2825 	}
2826     }
2827 
2828     EMSG2(_(e_letwrong), op);
2829     return FAIL;
2830 }
2831 
2832 /*
2833  * Add a watcher to a list.
2834  */
2835     static void
2836 list_add_watch(l, lw)
2837     list_T	*l;
2838     listwatch_T	*lw;
2839 {
2840     lw->lw_next = l->lv_watch;
2841     l->lv_watch = lw;
2842 }
2843 
2844 /*
2845  * Remove a watcher from a list.
2846  * No warning when it isn't found...
2847  */
2848     static void
2849 list_rem_watch(l, lwrem)
2850     list_T	*l;
2851     listwatch_T	*lwrem;
2852 {
2853     listwatch_T	*lw, **lwp;
2854 
2855     lwp = &l->lv_watch;
2856     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2857     {
2858 	if (lw == lwrem)
2859 	{
2860 	    *lwp = lw->lw_next;
2861 	    break;
2862 	}
2863 	lwp = &lw->lw_next;
2864     }
2865 }
2866 
2867 /*
2868  * Just before removing an item from a list: advance watchers to the next
2869  * item.
2870  */
2871     static void
2872 list_fix_watch(l, item)
2873     list_T	*l;
2874     listitem_T	*item;
2875 {
2876     listwatch_T	*lw;
2877 
2878     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2879 	if (lw->lw_item == item)
2880 	    lw->lw_item = item->li_next;
2881 }
2882 
2883 /*
2884  * Evaluate the expression used in a ":for var in expr" command.
2885  * "arg" points to "var".
2886  * Set "*errp" to TRUE for an error, FALSE otherwise;
2887  * Return a pointer that holds the info.  Null when there is an error.
2888  */
2889     void *
2890 eval_for_line(arg, errp, nextcmdp, skip)
2891     char_u	*arg;
2892     int		*errp;
2893     char_u	**nextcmdp;
2894     int		skip;
2895 {
2896     forinfo_T	*fi;
2897     char_u	*expr;
2898     typval_T	tv;
2899     list_T	*l;
2900 
2901     *errp = TRUE;	/* default: there is an error */
2902 
2903     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2904     if (fi == NULL)
2905 	return NULL;
2906 
2907     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2908     if (expr == NULL)
2909 	return fi;
2910 
2911     expr = skipwhite(expr);
2912     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2913     {
2914 	EMSG(_("E690: Missing \"in\" after :for"));
2915 	return fi;
2916     }
2917 
2918     if (skip)
2919 	++emsg_skip;
2920     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2921     {
2922 	*errp = FALSE;
2923 	if (!skip)
2924 	{
2925 	    l = tv.vval.v_list;
2926 	    if (tv.v_type != VAR_LIST || l == NULL)
2927 	    {
2928 		EMSG(_(e_listreq));
2929 		clear_tv(&tv);
2930 	    }
2931 	    else
2932 	    {
2933 		/* No need to increment the refcount, it's already set for the
2934 		 * list being used in "tv". */
2935 		fi->fi_list = l;
2936 		list_add_watch(l, &fi->fi_lw);
2937 		fi->fi_lw.lw_item = l->lv_first;
2938 	    }
2939 	}
2940     }
2941     if (skip)
2942 	--emsg_skip;
2943 
2944     return fi;
2945 }
2946 
2947 /*
2948  * Use the first item in a ":for" list.  Advance to the next.
2949  * Assign the values to the variable (list).  "arg" points to the first one.
2950  * Return TRUE when a valid item was found, FALSE when at end of list or
2951  * something wrong.
2952  */
2953     int
2954 next_for_item(fi_void, arg)
2955     void	*fi_void;
2956     char_u	*arg;
2957 {
2958     forinfo_T    *fi = (forinfo_T *)fi_void;
2959     int		result;
2960     listitem_T	*item;
2961 
2962     item = fi->fi_lw.lw_item;
2963     if (item == NULL)
2964 	result = FALSE;
2965     else
2966     {
2967 	fi->fi_lw.lw_item = item->li_next;
2968 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2969 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2970     }
2971     return result;
2972 }
2973 
2974 /*
2975  * Free the structure used to store info used by ":for".
2976  */
2977     void
2978 free_for_info(fi_void)
2979     void *fi_void;
2980 {
2981     forinfo_T    *fi = (forinfo_T *)fi_void;
2982 
2983     if (fi != NULL && fi->fi_list != NULL)
2984     {
2985 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2986 	list_unref(fi->fi_list);
2987     }
2988     vim_free(fi);
2989 }
2990 
2991 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2992 
2993     void
2994 set_context_for_expression(xp, arg, cmdidx)
2995     expand_T	*xp;
2996     char_u	*arg;
2997     cmdidx_T	cmdidx;
2998 {
2999     int		got_eq = FALSE;
3000     int		c;
3001     char_u	*p;
3002 
3003     if (cmdidx == CMD_let)
3004     {
3005 	xp->xp_context = EXPAND_USER_VARS;
3006 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
3007 	{
3008 	    /* ":let var1 var2 ...": find last space. */
3009 	    for (p = arg + STRLEN(arg); p >= arg; )
3010 	    {
3011 		xp->xp_pattern = p;
3012 		mb_ptr_back(arg, p);
3013 		if (vim_iswhite(*p))
3014 		    break;
3015 	    }
3016 	    return;
3017 	}
3018     }
3019     else
3020 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
3021 							  : EXPAND_EXPRESSION;
3022     while ((xp->xp_pattern = vim_strpbrk(arg,
3023 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
3024     {
3025 	c = *xp->xp_pattern;
3026 	if (c == '&')
3027 	{
3028 	    c = xp->xp_pattern[1];
3029 	    if (c == '&')
3030 	    {
3031 		++xp->xp_pattern;
3032 		xp->xp_context = cmdidx != CMD_let || got_eq
3033 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
3034 	    }
3035 	    else if (c != ' ')
3036 	    {
3037 		xp->xp_context = EXPAND_SETTINGS;
3038 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
3039 		    xp->xp_pattern += 2;
3040 
3041 	    }
3042 	}
3043 	else if (c == '$')
3044 	{
3045 	    /* environment variable */
3046 	    xp->xp_context = EXPAND_ENV_VARS;
3047 	}
3048 	else if (c == '=')
3049 	{
3050 	    got_eq = TRUE;
3051 	    xp->xp_context = EXPAND_EXPRESSION;
3052 	}
3053 	else if (c == '<'
3054 		&& xp->xp_context == EXPAND_FUNCTIONS
3055 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
3056 	{
3057 	    /* Function name can start with "<SNR>" */
3058 	    break;
3059 	}
3060 	else if (cmdidx != CMD_let || got_eq)
3061 	{
3062 	    if (c == '"')	    /* string */
3063 	    {
3064 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
3065 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
3066 			++xp->xp_pattern;
3067 		xp->xp_context = EXPAND_NOTHING;
3068 	    }
3069 	    else if (c == '\'')	    /* literal string */
3070 	    {
3071 		/* Trick: '' is like stopping and starting a literal string. */
3072 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
3073 		    /* skip */ ;
3074 		xp->xp_context = EXPAND_NOTHING;
3075 	    }
3076 	    else if (c == '|')
3077 	    {
3078 		if (xp->xp_pattern[1] == '|')
3079 		{
3080 		    ++xp->xp_pattern;
3081 		    xp->xp_context = EXPAND_EXPRESSION;
3082 		}
3083 		else
3084 		    xp->xp_context = EXPAND_COMMANDS;
3085 	    }
3086 	    else
3087 		xp->xp_context = EXPAND_EXPRESSION;
3088 	}
3089 	else
3090 	    /* Doesn't look like something valid, expand as an expression
3091 	     * anyway. */
3092 	    xp->xp_context = EXPAND_EXPRESSION;
3093 	arg = xp->xp_pattern;
3094 	if (*arg != NUL)
3095 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
3096 		/* skip */ ;
3097     }
3098     xp->xp_pattern = arg;
3099 }
3100 
3101 #endif /* FEAT_CMDL_COMPL */
3102 
3103 /*
3104  * ":1,25call func(arg1, arg2)"	function call.
3105  */
3106     void
3107 ex_call(eap)
3108     exarg_T	*eap;
3109 {
3110     char_u	*arg = eap->arg;
3111     char_u	*startarg;
3112     char_u	*name;
3113     char_u	*tofree;
3114     int		len;
3115     typval_T	rettv;
3116     linenr_T	lnum;
3117     int		doesrange;
3118     int		failed = FALSE;
3119     funcdict_T	fudi;
3120 
3121     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3122     vim_free(fudi.fd_newkey);
3123     if (tofree == NULL)
3124 	return;
3125 
3126     /* Increase refcount on dictionary, it could get deleted when evaluating
3127      * the arguments. */
3128     if (fudi.fd_dict != NULL)
3129 	++fudi.fd_dict->dv_refcount;
3130 
3131     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3132     len = (int)STRLEN(tofree);
3133     name = deref_func_name(tofree, &len);
3134 
3135     /* Skip white space to allow ":call func ()".  Not good, but required for
3136      * backward compatibility. */
3137     startarg = skipwhite(arg);
3138     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3139 
3140     if (*startarg != '(')
3141     {
3142 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3143 	goto end;
3144     }
3145 
3146     /*
3147      * When skipping, evaluate the function once, to find the end of the
3148      * arguments.
3149      * When the function takes a range, this is discovered after the first
3150      * call, and the loop is broken.
3151      */
3152     if (eap->skip)
3153     {
3154 	++emsg_skip;
3155 	lnum = eap->line2;	/* do it once, also with an invalid range */
3156     }
3157     else
3158 	lnum = eap->line1;
3159     for ( ; lnum <= eap->line2; ++lnum)
3160     {
3161 	if (!eap->skip && eap->addr_count > 0)
3162 	{
3163 	    curwin->w_cursor.lnum = lnum;
3164 	    curwin->w_cursor.col = 0;
3165 	}
3166 	arg = startarg;
3167 	if (get_func_tv(name, (int)STRLEN(name), &rettv, &arg,
3168 		    eap->line1, eap->line2, &doesrange,
3169 					    !eap->skip, fudi.fd_dict) == FAIL)
3170 	{
3171 	    failed = TRUE;
3172 	    break;
3173 	}
3174 	clear_tv(&rettv);
3175 	if (doesrange || eap->skip)
3176 	    break;
3177 	/* Stop when immediately aborting on error, or when an interrupt
3178 	 * occurred or an exception was thrown but not caught.
3179 	 * get_func_tv() returned OK, so that the check for trailing
3180 	 * characters below is executed. */
3181 	if (aborting())
3182 	    break;
3183     }
3184     if (eap->skip)
3185 	--emsg_skip;
3186 
3187     if (!failed)
3188     {
3189 	/* Check for trailing illegal characters and a following command. */
3190 	if (!ends_excmd(*arg))
3191 	{
3192 	    emsg_severe = TRUE;
3193 	    EMSG(_(e_trailing));
3194 	}
3195 	else
3196 	    eap->nextcmd = check_nextcmd(arg);
3197     }
3198 
3199 end:
3200     dict_unref(fudi.fd_dict);
3201     vim_free(tofree);
3202 }
3203 
3204 /*
3205  * ":unlet[!] var1 ... " command.
3206  */
3207     void
3208 ex_unlet(eap)
3209     exarg_T	*eap;
3210 {
3211     ex_unletlock(eap, eap->arg, 0);
3212 }
3213 
3214 /*
3215  * ":lockvar" and ":unlockvar" commands
3216  */
3217     void
3218 ex_lockvar(eap)
3219     exarg_T	*eap;
3220 {
3221     char_u	*arg = eap->arg;
3222     int		deep = 2;
3223 
3224     if (eap->forceit)
3225 	deep = -1;
3226     else if (vim_isdigit(*arg))
3227     {
3228 	deep = getdigits(&arg);
3229 	arg = skipwhite(arg);
3230     }
3231 
3232     ex_unletlock(eap, arg, deep);
3233 }
3234 
3235 /*
3236  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3237  */
3238     static void
3239 ex_unletlock(eap, argstart, deep)
3240     exarg_T	*eap;
3241     char_u	*argstart;
3242     int		deep;
3243 {
3244     char_u	*arg = argstart;
3245     char_u	*name_end;
3246     int		error = FALSE;
3247     lval_T	lv;
3248 
3249     do
3250     {
3251 	/* Parse the name and find the end. */
3252 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3253 							     FNE_CHECK_START);
3254 	if (lv.ll_name == NULL)
3255 	    error = TRUE;	    /* error but continue parsing */
3256 	if (name_end == NULL || (!vim_iswhite(*name_end)
3257 						   && !ends_excmd(*name_end)))
3258 	{
3259 	    if (name_end != NULL)
3260 	    {
3261 		emsg_severe = TRUE;
3262 		EMSG(_(e_trailing));
3263 	    }
3264 	    if (!(eap->skip || error))
3265 		clear_lval(&lv);
3266 	    break;
3267 	}
3268 
3269 	if (!error && !eap->skip)
3270 	{
3271 	    if (eap->cmdidx == CMD_unlet)
3272 	    {
3273 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3274 		    error = TRUE;
3275 	    }
3276 	    else
3277 	    {
3278 		if (do_lock_var(&lv, name_end, deep,
3279 					  eap->cmdidx == CMD_lockvar) == FAIL)
3280 		    error = TRUE;
3281 	    }
3282 	}
3283 
3284 	if (!eap->skip)
3285 	    clear_lval(&lv);
3286 
3287 	arg = skipwhite(name_end);
3288     } while (!ends_excmd(*arg));
3289 
3290     eap->nextcmd = check_nextcmd(arg);
3291 }
3292 
3293     static int
3294 do_unlet_var(lp, name_end, forceit)
3295     lval_T	*lp;
3296     char_u	*name_end;
3297     int		forceit;
3298 {
3299     int		ret = OK;
3300     int		cc;
3301 
3302     if (lp->ll_tv == NULL)
3303     {
3304 	cc = *name_end;
3305 	*name_end = NUL;
3306 
3307 	/* Normal name or expanded name. */
3308 	if (check_changedtick(lp->ll_name))
3309 	    ret = FAIL;
3310 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3311 	    ret = FAIL;
3312 	*name_end = cc;
3313     }
3314     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3315 	return FAIL;
3316     else if (lp->ll_range)
3317     {
3318 	listitem_T    *li;
3319 
3320 	/* Delete a range of List items. */
3321 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3322 	{
3323 	    li = lp->ll_li->li_next;
3324 	    listitem_remove(lp->ll_list, lp->ll_li);
3325 	    lp->ll_li = li;
3326 	    ++lp->ll_n1;
3327 	}
3328     }
3329     else
3330     {
3331 	if (lp->ll_list != NULL)
3332 	    /* unlet a List item. */
3333 	    listitem_remove(lp->ll_list, lp->ll_li);
3334 	else
3335 	    /* unlet a Dictionary item. */
3336 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3337     }
3338 
3339     return ret;
3340 }
3341 
3342 /*
3343  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3344  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3345  */
3346     int
3347 do_unlet(name, forceit)
3348     char_u	*name;
3349     int		forceit;
3350 {
3351     hashtab_T	*ht;
3352     hashitem_T	*hi;
3353     char_u	*varname;
3354 
3355     ht = find_var_ht(name, &varname);
3356     if (ht != NULL && *varname != NUL)
3357     {
3358 	hi = hash_find(ht, varname);
3359 	if (!HASHITEM_EMPTY(hi))
3360 	{
3361 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3362 		return FAIL;
3363 	    delete_var(ht, hi);
3364 	    return OK;
3365 	}
3366     }
3367     if (forceit)
3368 	return OK;
3369     EMSG2(_("E108: No such variable: \"%s\""), name);
3370     return FAIL;
3371 }
3372 
3373 /*
3374  * Lock or unlock variable indicated by "lp".
3375  * "deep" is the levels to go (-1 for unlimited);
3376  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3377  */
3378     static int
3379 do_lock_var(lp, name_end, deep, lock)
3380     lval_T	*lp;
3381     char_u	*name_end;
3382     int		deep;
3383     int		lock;
3384 {
3385     int		ret = OK;
3386     int		cc;
3387     dictitem_T	*di;
3388 
3389     if (deep == 0)	/* nothing to do */
3390 	return OK;
3391 
3392     if (lp->ll_tv == NULL)
3393     {
3394 	cc = *name_end;
3395 	*name_end = NUL;
3396 
3397 	/* Normal name or expanded name. */
3398 	if (check_changedtick(lp->ll_name))
3399 	    ret = FAIL;
3400 	else
3401 	{
3402 	    di = find_var(lp->ll_name, NULL);
3403 	    if (di == NULL)
3404 		ret = FAIL;
3405 	    else
3406 	    {
3407 		if (lock)
3408 		    di->di_flags |= DI_FLAGS_LOCK;
3409 		else
3410 		    di->di_flags &= ~DI_FLAGS_LOCK;
3411 		item_lock(&di->di_tv, deep, lock);
3412 	    }
3413 	}
3414 	*name_end = cc;
3415     }
3416     else if (lp->ll_range)
3417     {
3418 	listitem_T    *li = lp->ll_li;
3419 
3420 	/* (un)lock a range of List items. */
3421 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3422 	{
3423 	    item_lock(&li->li_tv, deep, lock);
3424 	    li = li->li_next;
3425 	    ++lp->ll_n1;
3426 	}
3427     }
3428     else if (lp->ll_list != NULL)
3429 	/* (un)lock a List item. */
3430 	item_lock(&lp->ll_li->li_tv, deep, lock);
3431     else
3432 	/* un(lock) a Dictionary item. */
3433 	item_lock(&lp->ll_di->di_tv, deep, lock);
3434 
3435     return ret;
3436 }
3437 
3438 /*
3439  * Lock or unlock an item.  "deep" is nr of levels to go.
3440  */
3441     static void
3442 item_lock(tv, deep, lock)
3443     typval_T	*tv;
3444     int		deep;
3445     int		lock;
3446 {
3447     static int	recurse = 0;
3448     list_T	*l;
3449     listitem_T	*li;
3450     dict_T	*d;
3451     hashitem_T	*hi;
3452     int		todo;
3453 
3454     if (recurse >= DICT_MAXNEST)
3455     {
3456 	EMSG(_("E743: variable nested too deep for (un)lock"));
3457 	return;
3458     }
3459     if (deep == 0)
3460 	return;
3461     ++recurse;
3462 
3463     /* lock/unlock the item itself */
3464     if (lock)
3465 	tv->v_lock |= VAR_LOCKED;
3466     else
3467 	tv->v_lock &= ~VAR_LOCKED;
3468 
3469     switch (tv->v_type)
3470     {
3471 	case VAR_LIST:
3472 	    if ((l = tv->vval.v_list) != NULL)
3473 	    {
3474 		if (lock)
3475 		    l->lv_lock |= VAR_LOCKED;
3476 		else
3477 		    l->lv_lock &= ~VAR_LOCKED;
3478 		if (deep < 0 || deep > 1)
3479 		    /* recursive: lock/unlock the items the List contains */
3480 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3481 			item_lock(&li->li_tv, deep - 1, lock);
3482 	    }
3483 	    break;
3484 	case VAR_DICT:
3485 	    if ((d = tv->vval.v_dict) != NULL)
3486 	    {
3487 		if (lock)
3488 		    d->dv_lock |= VAR_LOCKED;
3489 		else
3490 		    d->dv_lock &= ~VAR_LOCKED;
3491 		if (deep < 0 || deep > 1)
3492 		{
3493 		    /* recursive: lock/unlock the items the List contains */
3494 		    todo = (int)d->dv_hashtab.ht_used;
3495 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3496 		    {
3497 			if (!HASHITEM_EMPTY(hi))
3498 			{
3499 			    --todo;
3500 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3501 			}
3502 		    }
3503 		}
3504 	    }
3505     }
3506     --recurse;
3507 }
3508 
3509 /*
3510  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3511  * it refers to a List or Dictionary that is locked.
3512  */
3513     static int
3514 tv_islocked(tv)
3515     typval_T	*tv;
3516 {
3517     return (tv->v_lock & VAR_LOCKED)
3518 	|| (tv->v_type == VAR_LIST
3519 		&& tv->vval.v_list != NULL
3520 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3521 	|| (tv->v_type == VAR_DICT
3522 		&& tv->vval.v_dict != NULL
3523 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3524 }
3525 
3526 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3527 /*
3528  * Delete all "menutrans_" variables.
3529  */
3530     void
3531 del_menutrans_vars()
3532 {
3533     hashitem_T	*hi;
3534     int		todo;
3535 
3536     hash_lock(&globvarht);
3537     todo = (int)globvarht.ht_used;
3538     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3539     {
3540 	if (!HASHITEM_EMPTY(hi))
3541 	{
3542 	    --todo;
3543 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3544 		delete_var(&globvarht, hi);
3545 	}
3546     }
3547     hash_unlock(&globvarht);
3548 }
3549 #endif
3550 
3551 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3552 
3553 /*
3554  * Local string buffer for the next two functions to store a variable name
3555  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3556  * get_user_var_name().
3557  */
3558 
3559 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3560 
3561 static char_u	*varnamebuf = NULL;
3562 static int	varnamebuflen = 0;
3563 
3564 /*
3565  * Function to concatenate a prefix and a variable name.
3566  */
3567     static char_u *
3568 cat_prefix_varname(prefix, name)
3569     int		prefix;
3570     char_u	*name;
3571 {
3572     int		len;
3573 
3574     len = (int)STRLEN(name) + 3;
3575     if (len > varnamebuflen)
3576     {
3577 	vim_free(varnamebuf);
3578 	len += 10;			/* some additional space */
3579 	varnamebuf = alloc(len);
3580 	if (varnamebuf == NULL)
3581 	{
3582 	    varnamebuflen = 0;
3583 	    return NULL;
3584 	}
3585 	varnamebuflen = len;
3586     }
3587     *varnamebuf = prefix;
3588     varnamebuf[1] = ':';
3589     STRCPY(varnamebuf + 2, name);
3590     return varnamebuf;
3591 }
3592 
3593 /*
3594  * Function given to ExpandGeneric() to obtain the list of user defined
3595  * (global/buffer/window/built-in) variable names.
3596  */
3597 /*ARGSUSED*/
3598     char_u *
3599 get_user_var_name(xp, idx)
3600     expand_T	*xp;
3601     int		idx;
3602 {
3603     static long_u	gdone;
3604     static long_u	bdone;
3605     static long_u	wdone;
3606 #ifdef FEAT_WINDOWS
3607     static long_u	tdone;
3608 #endif
3609     static int		vidx;
3610     static hashitem_T	*hi;
3611     hashtab_T		*ht;
3612 
3613     if (idx == 0)
3614     {
3615 	gdone = bdone = wdone = vidx = 0;
3616 #ifdef FEAT_WINDOWS
3617 	tdone = 0;
3618 #endif
3619     }
3620 
3621     /* Global variables */
3622     if (gdone < globvarht.ht_used)
3623     {
3624 	if (gdone++ == 0)
3625 	    hi = globvarht.ht_array;
3626 	else
3627 	    ++hi;
3628 	while (HASHITEM_EMPTY(hi))
3629 	    ++hi;
3630 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3631 	    return cat_prefix_varname('g', hi->hi_key);
3632 	return hi->hi_key;
3633     }
3634 
3635     /* b: variables */
3636     ht = &curbuf->b_vars.dv_hashtab;
3637     if (bdone < ht->ht_used)
3638     {
3639 	if (bdone++ == 0)
3640 	    hi = ht->ht_array;
3641 	else
3642 	    ++hi;
3643 	while (HASHITEM_EMPTY(hi))
3644 	    ++hi;
3645 	return cat_prefix_varname('b', hi->hi_key);
3646     }
3647     if (bdone == ht->ht_used)
3648     {
3649 	++bdone;
3650 	return (char_u *)"b:changedtick";
3651     }
3652 
3653     /* w: variables */
3654     ht = &curwin->w_vars.dv_hashtab;
3655     if (wdone < ht->ht_used)
3656     {
3657 	if (wdone++ == 0)
3658 	    hi = ht->ht_array;
3659 	else
3660 	    ++hi;
3661 	while (HASHITEM_EMPTY(hi))
3662 	    ++hi;
3663 	return cat_prefix_varname('w', hi->hi_key);
3664     }
3665 
3666 #ifdef FEAT_WINDOWS
3667     /* t: variables */
3668     ht = &curtab->tp_vars.dv_hashtab;
3669     if (tdone < ht->ht_used)
3670     {
3671 	if (tdone++ == 0)
3672 	    hi = ht->ht_array;
3673 	else
3674 	    ++hi;
3675 	while (HASHITEM_EMPTY(hi))
3676 	    ++hi;
3677 	return cat_prefix_varname('t', hi->hi_key);
3678     }
3679 #endif
3680 
3681     /* v: variables */
3682     if (vidx < VV_LEN)
3683 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3684 
3685     vim_free(varnamebuf);
3686     varnamebuf = NULL;
3687     varnamebuflen = 0;
3688     return NULL;
3689 }
3690 
3691 #endif /* FEAT_CMDL_COMPL */
3692 
3693 /*
3694  * types for expressions.
3695  */
3696 typedef enum
3697 {
3698     TYPE_UNKNOWN = 0
3699     , TYPE_EQUAL	/* == */
3700     , TYPE_NEQUAL	/* != */
3701     , TYPE_GREATER	/* >  */
3702     , TYPE_GEQUAL	/* >= */
3703     , TYPE_SMALLER	/* <  */
3704     , TYPE_SEQUAL	/* <= */
3705     , TYPE_MATCH	/* =~ */
3706     , TYPE_NOMATCH	/* !~ */
3707 } exptype_T;
3708 
3709 /*
3710  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3711  * executed.  The function may return OK, but the rettv will be of type
3712  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3713  */
3714 
3715 /*
3716  * Handle zero level expression.
3717  * This calls eval1() and handles error message and nextcmd.
3718  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3719  * Note: "rettv.v_lock" is not set.
3720  * Return OK or FAIL.
3721  */
3722     static int
3723 eval0(arg, rettv, nextcmd, evaluate)
3724     char_u	*arg;
3725     typval_T	*rettv;
3726     char_u	**nextcmd;
3727     int		evaluate;
3728 {
3729     int		ret;
3730     char_u	*p;
3731 
3732     p = skipwhite(arg);
3733     ret = eval1(&p, rettv, evaluate);
3734     if (ret == FAIL || !ends_excmd(*p))
3735     {
3736 	if (ret != FAIL)
3737 	    clear_tv(rettv);
3738 	/*
3739 	 * Report the invalid expression unless the expression evaluation has
3740 	 * been cancelled due to an aborting error, an interrupt, or an
3741 	 * exception.
3742 	 */
3743 	if (!aborting())
3744 	    EMSG2(_(e_invexpr2), arg);
3745 	ret = FAIL;
3746     }
3747     if (nextcmd != NULL)
3748 	*nextcmd = check_nextcmd(p);
3749 
3750     return ret;
3751 }
3752 
3753 /*
3754  * Handle top level expression:
3755  *	expr1 ? expr0 : expr0
3756  *
3757  * "arg" must point to the first non-white of the expression.
3758  * "arg" is advanced to the next non-white after the recognized expression.
3759  *
3760  * Note: "rettv.v_lock" is not set.
3761  *
3762  * Return OK or FAIL.
3763  */
3764     static int
3765 eval1(arg, rettv, evaluate)
3766     char_u	**arg;
3767     typval_T	*rettv;
3768     int		evaluate;
3769 {
3770     int		result;
3771     typval_T	var2;
3772 
3773     /*
3774      * Get the first variable.
3775      */
3776     if (eval2(arg, rettv, evaluate) == FAIL)
3777 	return FAIL;
3778 
3779     if ((*arg)[0] == '?')
3780     {
3781 	result = FALSE;
3782 	if (evaluate)
3783 	{
3784 	    int		error = FALSE;
3785 
3786 	    if (get_tv_number_chk(rettv, &error) != 0)
3787 		result = TRUE;
3788 	    clear_tv(rettv);
3789 	    if (error)
3790 		return FAIL;
3791 	}
3792 
3793 	/*
3794 	 * Get the second variable.
3795 	 */
3796 	*arg = skipwhite(*arg + 1);
3797 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3798 	    return FAIL;
3799 
3800 	/*
3801 	 * Check for the ":".
3802 	 */
3803 	if ((*arg)[0] != ':')
3804 	{
3805 	    EMSG(_("E109: Missing ':' after '?'"));
3806 	    if (evaluate && result)
3807 		clear_tv(rettv);
3808 	    return FAIL;
3809 	}
3810 
3811 	/*
3812 	 * Get the third variable.
3813 	 */
3814 	*arg = skipwhite(*arg + 1);
3815 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3816 	{
3817 	    if (evaluate && result)
3818 		clear_tv(rettv);
3819 	    return FAIL;
3820 	}
3821 	if (evaluate && !result)
3822 	    *rettv = var2;
3823     }
3824 
3825     return OK;
3826 }
3827 
3828 /*
3829  * Handle first level expression:
3830  *	expr2 || expr2 || expr2	    logical OR
3831  *
3832  * "arg" must point to the first non-white of the expression.
3833  * "arg" is advanced to the next non-white after the recognized expression.
3834  *
3835  * Return OK or FAIL.
3836  */
3837     static int
3838 eval2(arg, rettv, evaluate)
3839     char_u	**arg;
3840     typval_T	*rettv;
3841     int		evaluate;
3842 {
3843     typval_T	var2;
3844     long	result;
3845     int		first;
3846     int		error = FALSE;
3847 
3848     /*
3849      * Get the first variable.
3850      */
3851     if (eval3(arg, rettv, evaluate) == FAIL)
3852 	return FAIL;
3853 
3854     /*
3855      * Repeat until there is no following "||".
3856      */
3857     first = TRUE;
3858     result = FALSE;
3859     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3860     {
3861 	if (evaluate && first)
3862 	{
3863 	    if (get_tv_number_chk(rettv, &error) != 0)
3864 		result = TRUE;
3865 	    clear_tv(rettv);
3866 	    if (error)
3867 		return FAIL;
3868 	    first = FALSE;
3869 	}
3870 
3871 	/*
3872 	 * Get the second variable.
3873 	 */
3874 	*arg = skipwhite(*arg + 2);
3875 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3876 	    return FAIL;
3877 
3878 	/*
3879 	 * Compute the result.
3880 	 */
3881 	if (evaluate && !result)
3882 	{
3883 	    if (get_tv_number_chk(&var2, &error) != 0)
3884 		result = TRUE;
3885 	    clear_tv(&var2);
3886 	    if (error)
3887 		return FAIL;
3888 	}
3889 	if (evaluate)
3890 	{
3891 	    rettv->v_type = VAR_NUMBER;
3892 	    rettv->vval.v_number = result;
3893 	}
3894     }
3895 
3896     return OK;
3897 }
3898 
3899 /*
3900  * Handle second level expression:
3901  *	expr3 && expr3 && expr3	    logical AND
3902  *
3903  * "arg" must point to the first non-white of the expression.
3904  * "arg" is advanced to the next non-white after the recognized expression.
3905  *
3906  * Return OK or FAIL.
3907  */
3908     static int
3909 eval3(arg, rettv, evaluate)
3910     char_u	**arg;
3911     typval_T	*rettv;
3912     int		evaluate;
3913 {
3914     typval_T	var2;
3915     long	result;
3916     int		first;
3917     int		error = FALSE;
3918 
3919     /*
3920      * Get the first variable.
3921      */
3922     if (eval4(arg, rettv, evaluate) == FAIL)
3923 	return FAIL;
3924 
3925     /*
3926      * Repeat until there is no following "&&".
3927      */
3928     first = TRUE;
3929     result = TRUE;
3930     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3931     {
3932 	if (evaluate && first)
3933 	{
3934 	    if (get_tv_number_chk(rettv, &error) == 0)
3935 		result = FALSE;
3936 	    clear_tv(rettv);
3937 	    if (error)
3938 		return FAIL;
3939 	    first = FALSE;
3940 	}
3941 
3942 	/*
3943 	 * Get the second variable.
3944 	 */
3945 	*arg = skipwhite(*arg + 2);
3946 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3947 	    return FAIL;
3948 
3949 	/*
3950 	 * Compute the result.
3951 	 */
3952 	if (evaluate && result)
3953 	{
3954 	    if (get_tv_number_chk(&var2, &error) == 0)
3955 		result = FALSE;
3956 	    clear_tv(&var2);
3957 	    if (error)
3958 		return FAIL;
3959 	}
3960 	if (evaluate)
3961 	{
3962 	    rettv->v_type = VAR_NUMBER;
3963 	    rettv->vval.v_number = result;
3964 	}
3965     }
3966 
3967     return OK;
3968 }
3969 
3970 /*
3971  * Handle third level expression:
3972  *	var1 == var2
3973  *	var1 =~ var2
3974  *	var1 != var2
3975  *	var1 !~ var2
3976  *	var1 > var2
3977  *	var1 >= var2
3978  *	var1 < var2
3979  *	var1 <= var2
3980  *	var1 is var2
3981  *	var1 isnot var2
3982  *
3983  * "arg" must point to the first non-white of the expression.
3984  * "arg" is advanced to the next non-white after the recognized expression.
3985  *
3986  * Return OK or FAIL.
3987  */
3988     static int
3989 eval4(arg, rettv, evaluate)
3990     char_u	**arg;
3991     typval_T	*rettv;
3992     int		evaluate;
3993 {
3994     typval_T	var2;
3995     char_u	*p;
3996     int		i;
3997     exptype_T	type = TYPE_UNKNOWN;
3998     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3999     int		len = 2;
4000     long	n1, n2;
4001     char_u	*s1, *s2;
4002     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4003     regmatch_T	regmatch;
4004     int		ic;
4005     char_u	*save_cpo;
4006 
4007     /*
4008      * Get the first variable.
4009      */
4010     if (eval5(arg, rettv, evaluate) == FAIL)
4011 	return FAIL;
4012 
4013     p = *arg;
4014     switch (p[0])
4015     {
4016 	case '=':   if (p[1] == '=')
4017 			type = TYPE_EQUAL;
4018 		    else if (p[1] == '~')
4019 			type = TYPE_MATCH;
4020 		    break;
4021 	case '!':   if (p[1] == '=')
4022 			type = TYPE_NEQUAL;
4023 		    else if (p[1] == '~')
4024 			type = TYPE_NOMATCH;
4025 		    break;
4026 	case '>':   if (p[1] != '=')
4027 		    {
4028 			type = TYPE_GREATER;
4029 			len = 1;
4030 		    }
4031 		    else
4032 			type = TYPE_GEQUAL;
4033 		    break;
4034 	case '<':   if (p[1] != '=')
4035 		    {
4036 			type = TYPE_SMALLER;
4037 			len = 1;
4038 		    }
4039 		    else
4040 			type = TYPE_SEQUAL;
4041 		    break;
4042 	case 'i':   if (p[1] == 's')
4043 		    {
4044 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
4045 			    len = 5;
4046 			if (!vim_isIDc(p[len]))
4047 			{
4048 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
4049 			    type_is = TRUE;
4050 			}
4051 		    }
4052 		    break;
4053     }
4054 
4055     /*
4056      * If there is a comparitive operator, use it.
4057      */
4058     if (type != TYPE_UNKNOWN)
4059     {
4060 	/* extra question mark appended: ignore case */
4061 	if (p[len] == '?')
4062 	{
4063 	    ic = TRUE;
4064 	    ++len;
4065 	}
4066 	/* extra '#' appended: match case */
4067 	else if (p[len] == '#')
4068 	{
4069 	    ic = FALSE;
4070 	    ++len;
4071 	}
4072 	/* nothing appened: use 'ignorecase' */
4073 	else
4074 	    ic = p_ic;
4075 
4076 	/*
4077 	 * Get the second variable.
4078 	 */
4079 	*arg = skipwhite(p + len);
4080 	if (eval5(arg, &var2, evaluate) == FAIL)
4081 	{
4082 	    clear_tv(rettv);
4083 	    return FAIL;
4084 	}
4085 
4086 	if (evaluate)
4087 	{
4088 	    if (type_is && rettv->v_type != var2.v_type)
4089 	    {
4090 		/* For "is" a different type always means FALSE, for "notis"
4091 		 * it means TRUE. */
4092 		n1 = (type == TYPE_NEQUAL);
4093 	    }
4094 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
4095 	    {
4096 		if (type_is)
4097 		{
4098 		    n1 = (rettv->v_type == var2.v_type
4099 				   && rettv->vval.v_list == var2.vval.v_list);
4100 		    if (type == TYPE_NEQUAL)
4101 			n1 = !n1;
4102 		}
4103 		else if (rettv->v_type != var2.v_type
4104 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4105 		{
4106 		    if (rettv->v_type != var2.v_type)
4107 			EMSG(_("E691: Can only compare List with List"));
4108 		    else
4109 			EMSG(_("E692: Invalid operation for Lists"));
4110 		    clear_tv(rettv);
4111 		    clear_tv(&var2);
4112 		    return FAIL;
4113 		}
4114 		else
4115 		{
4116 		    /* Compare two Lists for being equal or unequal. */
4117 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
4118 		    if (type == TYPE_NEQUAL)
4119 			n1 = !n1;
4120 		}
4121 	    }
4122 
4123 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
4124 	    {
4125 		if (type_is)
4126 		{
4127 		    n1 = (rettv->v_type == var2.v_type
4128 				   && rettv->vval.v_dict == var2.vval.v_dict);
4129 		    if (type == TYPE_NEQUAL)
4130 			n1 = !n1;
4131 		}
4132 		else if (rettv->v_type != var2.v_type
4133 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4134 		{
4135 		    if (rettv->v_type != var2.v_type)
4136 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4137 		    else
4138 			EMSG(_("E736: Invalid operation for Dictionary"));
4139 		    clear_tv(rettv);
4140 		    clear_tv(&var2);
4141 		    return FAIL;
4142 		}
4143 		else
4144 		{
4145 		    /* Compare two Dictionaries for being equal or unequal. */
4146 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4147 		    if (type == TYPE_NEQUAL)
4148 			n1 = !n1;
4149 		}
4150 	    }
4151 
4152 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4153 	    {
4154 		if (rettv->v_type != var2.v_type
4155 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4156 		{
4157 		    if (rettv->v_type != var2.v_type)
4158 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4159 		    else
4160 			EMSG(_("E694: Invalid operation for Funcrefs"));
4161 		    clear_tv(rettv);
4162 		    clear_tv(&var2);
4163 		    return FAIL;
4164 		}
4165 		else
4166 		{
4167 		    /* Compare two Funcrefs for being equal or unequal. */
4168 		    if (rettv->vval.v_string == NULL
4169 						|| var2.vval.v_string == NULL)
4170 			n1 = FALSE;
4171 		    else
4172 			n1 = STRCMP(rettv->vval.v_string,
4173 						     var2.vval.v_string) == 0;
4174 		    if (type == TYPE_NEQUAL)
4175 			n1 = !n1;
4176 		}
4177 	    }
4178 
4179 	    /*
4180 	     * If one of the two variables is a number, compare as a number.
4181 	     * When using "=~" or "!~", always compare as string.
4182 	     */
4183 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4184 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4185 	    {
4186 		n1 = get_tv_number(rettv);
4187 		n2 = get_tv_number(&var2);
4188 		switch (type)
4189 		{
4190 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4191 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4192 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4193 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4194 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4195 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4196 		    case TYPE_UNKNOWN:
4197 		    case TYPE_MATCH:
4198 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4199 		}
4200 	    }
4201 	    else
4202 	    {
4203 		s1 = get_tv_string_buf(rettv, buf1);
4204 		s2 = get_tv_string_buf(&var2, buf2);
4205 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4206 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4207 		else
4208 		    i = 0;
4209 		n1 = FALSE;
4210 		switch (type)
4211 		{
4212 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4213 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4214 		    case TYPE_GREATER:  n1 = (i > 0); break;
4215 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4216 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4217 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4218 
4219 		    case TYPE_MATCH:
4220 		    case TYPE_NOMATCH:
4221 			    /* avoid 'l' flag in 'cpoptions' */
4222 			    save_cpo = p_cpo;
4223 			    p_cpo = (char_u *)"";
4224 			    regmatch.regprog = vim_regcomp(s2,
4225 							RE_MAGIC + RE_STRING);
4226 			    regmatch.rm_ic = ic;
4227 			    if (regmatch.regprog != NULL)
4228 			    {
4229 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4230 				vim_free(regmatch.regprog);
4231 				if (type == TYPE_NOMATCH)
4232 				    n1 = !n1;
4233 			    }
4234 			    p_cpo = save_cpo;
4235 			    break;
4236 
4237 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4238 		}
4239 	    }
4240 	    clear_tv(rettv);
4241 	    clear_tv(&var2);
4242 	    rettv->v_type = VAR_NUMBER;
4243 	    rettv->vval.v_number = n1;
4244 	}
4245     }
4246 
4247     return OK;
4248 }
4249 
4250 /*
4251  * Handle fourth level expression:
4252  *	+	number addition
4253  *	-	number subtraction
4254  *	.	string concatenation
4255  *
4256  * "arg" must point to the first non-white of the expression.
4257  * "arg" is advanced to the next non-white after the recognized expression.
4258  *
4259  * Return OK or FAIL.
4260  */
4261     static int
4262 eval5(arg, rettv, evaluate)
4263     char_u	**arg;
4264     typval_T	*rettv;
4265     int		evaluate;
4266 {
4267     typval_T	var2;
4268     typval_T	var3;
4269     int		op;
4270     long	n1, n2;
4271     char_u	*s1, *s2;
4272     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4273     char_u	*p;
4274 
4275     /*
4276      * Get the first variable.
4277      */
4278     if (eval6(arg, rettv, evaluate) == FAIL)
4279 	return FAIL;
4280 
4281     /*
4282      * Repeat computing, until no '+', '-' or '.' is following.
4283      */
4284     for (;;)
4285     {
4286 	op = **arg;
4287 	if (op != '+' && op != '-' && op != '.')
4288 	    break;
4289 
4290 	if (op != '+' || rettv->v_type != VAR_LIST)
4291 	{
4292 	    /* For "list + ...", an illegal use of the first operand as
4293 	     * a number cannot be determined before evaluating the 2nd
4294 	     * operand: if this is also a list, all is ok.
4295 	     * For "something . ...", "something - ..." or "non-list + ...",
4296 	     * we know that the first operand needs to be a string or number
4297 	     * without evaluating the 2nd operand.  So check before to avoid
4298 	     * side effects after an error. */
4299 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4300 	    {
4301 		clear_tv(rettv);
4302 		return FAIL;
4303 	    }
4304 	}
4305 
4306 	/*
4307 	 * Get the second variable.
4308 	 */
4309 	*arg = skipwhite(*arg + 1);
4310 	if (eval6(arg, &var2, evaluate) == FAIL)
4311 	{
4312 	    clear_tv(rettv);
4313 	    return FAIL;
4314 	}
4315 
4316 	if (evaluate)
4317 	{
4318 	    /*
4319 	     * Compute the result.
4320 	     */
4321 	    if (op == '.')
4322 	    {
4323 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4324 		s2 = get_tv_string_buf_chk(&var2, buf2);
4325 		if (s2 == NULL)		/* type error ? */
4326 		{
4327 		    clear_tv(rettv);
4328 		    clear_tv(&var2);
4329 		    return FAIL;
4330 		}
4331 		p = concat_str(s1, s2);
4332 		clear_tv(rettv);
4333 		rettv->v_type = VAR_STRING;
4334 		rettv->vval.v_string = p;
4335 	    }
4336 	    else if (op == '+' && rettv->v_type == VAR_LIST
4337 						   && var2.v_type == VAR_LIST)
4338 	    {
4339 		/* concatenate Lists */
4340 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4341 							       &var3) == FAIL)
4342 		{
4343 		    clear_tv(rettv);
4344 		    clear_tv(&var2);
4345 		    return FAIL;
4346 		}
4347 		clear_tv(rettv);
4348 		*rettv = var3;
4349 	    }
4350 	    else
4351 	    {
4352 		int	    error = FALSE;
4353 
4354 		n1 = get_tv_number_chk(rettv, &error);
4355 		if (error)
4356 		{
4357 		    /* This can only happen for "list + non-list".
4358 		     * For "non-list + ..." or "something - ...", we returned
4359 		     * before evaluating the 2nd operand. */
4360 		    clear_tv(rettv);
4361 		    return FAIL;
4362 		}
4363 		n2 = get_tv_number_chk(&var2, &error);
4364 		if (error)
4365 		{
4366 		    clear_tv(rettv);
4367 		    clear_tv(&var2);
4368 		    return FAIL;
4369 		}
4370 		clear_tv(rettv);
4371 		if (op == '+')
4372 		    n1 = n1 + n2;
4373 		else
4374 		    n1 = n1 - n2;
4375 		rettv->v_type = VAR_NUMBER;
4376 		rettv->vval.v_number = n1;
4377 	    }
4378 	    clear_tv(&var2);
4379 	}
4380     }
4381     return OK;
4382 }
4383 
4384 /*
4385  * Handle fifth level expression:
4386  *	*	number multiplication
4387  *	/	number division
4388  *	%	number modulo
4389  *
4390  * "arg" must point to the first non-white of the expression.
4391  * "arg" is advanced to the next non-white after the recognized expression.
4392  *
4393  * Return OK or FAIL.
4394  */
4395     static int
4396 eval6(arg, rettv, evaluate)
4397     char_u	**arg;
4398     typval_T	*rettv;
4399     int		evaluate;
4400 {
4401     typval_T	var2;
4402     int		op;
4403     long	n1, n2;
4404     int		error = FALSE;
4405 
4406     /*
4407      * Get the first variable.
4408      */
4409     if (eval7(arg, rettv, evaluate) == FAIL)
4410 	return FAIL;
4411 
4412     /*
4413      * Repeat computing, until no '*', '/' or '%' is following.
4414      */
4415     for (;;)
4416     {
4417 	op = **arg;
4418 	if (op != '*' && op != '/' && op != '%')
4419 	    break;
4420 
4421 	if (evaluate)
4422 	{
4423 	    n1 = get_tv_number_chk(rettv, &error);
4424 	    clear_tv(rettv);
4425 	    if (error)
4426 		return FAIL;
4427 	}
4428 	else
4429 	    n1 = 0;
4430 
4431 	/*
4432 	 * Get the second variable.
4433 	 */
4434 	*arg = skipwhite(*arg + 1);
4435 	if (eval7(arg, &var2, evaluate) == FAIL)
4436 	    return FAIL;
4437 
4438 	if (evaluate)
4439 	{
4440 	    n2 = get_tv_number_chk(&var2, &error);
4441 	    clear_tv(&var2);
4442 	    if (error)
4443 		return FAIL;
4444 
4445 	    /*
4446 	     * Compute the result.
4447 	     */
4448 	    if (op == '*')
4449 		n1 = n1 * n2;
4450 	    else if (op == '/')
4451 	    {
4452 		if (n2 == 0)	/* give an error message? */
4453 		    n1 = 0x7fffffffL;
4454 		else
4455 		    n1 = n1 / n2;
4456 	    }
4457 	    else
4458 	    {
4459 		if (n2 == 0)	/* give an error message? */
4460 		    n1 = 0;
4461 		else
4462 		    n1 = n1 % n2;
4463 	    }
4464 	    rettv->v_type = VAR_NUMBER;
4465 	    rettv->vval.v_number = n1;
4466 	}
4467     }
4468 
4469     return OK;
4470 }
4471 
4472 /*
4473  * Handle sixth level expression:
4474  *  number		number constant
4475  *  "string"		string contstant
4476  *  'string'		literal string contstant
4477  *  &option-name	option value
4478  *  @r			register contents
4479  *  identifier		variable value
4480  *  function()		function call
4481  *  $VAR		environment variable
4482  *  (expression)	nested expression
4483  *  [expr, expr]	List
4484  *  {key: val, key: val}  Dictionary
4485  *
4486  *  Also handle:
4487  *  ! in front		logical NOT
4488  *  - in front		unary minus
4489  *  + in front		unary plus (ignored)
4490  *  trailing []		subscript in String or List
4491  *  trailing .name	entry in Dictionary
4492  *
4493  * "arg" must point to the first non-white of the expression.
4494  * "arg" is advanced to the next non-white after the recognized expression.
4495  *
4496  * Return OK or FAIL.
4497  */
4498     static int
4499 eval7(arg, rettv, evaluate)
4500     char_u	**arg;
4501     typval_T	*rettv;
4502     int		evaluate;
4503 {
4504     long	n;
4505     int		len;
4506     char_u	*s;
4507     int		val;
4508     char_u	*start_leader, *end_leader;
4509     int		ret = OK;
4510     char_u	*alias;
4511 
4512     /*
4513      * Initialise variable so that clear_tv() can't mistake this for a
4514      * string and free a string that isn't there.
4515      */
4516     rettv->v_type = VAR_UNKNOWN;
4517 
4518     /*
4519      * Skip '!' and '-' characters.  They are handled later.
4520      */
4521     start_leader = *arg;
4522     while (**arg == '!' || **arg == '-' || **arg == '+')
4523 	*arg = skipwhite(*arg + 1);
4524     end_leader = *arg;
4525 
4526     switch (**arg)
4527     {
4528     /*
4529      * Number constant.
4530      */
4531     case '0':
4532     case '1':
4533     case '2':
4534     case '3':
4535     case '4':
4536     case '5':
4537     case '6':
4538     case '7':
4539     case '8':
4540     case '9':
4541 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4542 		*arg += len;
4543 		if (evaluate)
4544 		{
4545 		    rettv->v_type = VAR_NUMBER;
4546 		    rettv->vval.v_number = n;
4547 		}
4548 		break;
4549 
4550     /*
4551      * String constant: "string".
4552      */
4553     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4554 		break;
4555 
4556     /*
4557      * Literal string constant: 'str''ing'.
4558      */
4559     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4560 		break;
4561 
4562     /*
4563      * List: [expr, expr]
4564      */
4565     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4566 		break;
4567 
4568     /*
4569      * Dictionary: {key: val, key: val}
4570      */
4571     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4572 		break;
4573 
4574     /*
4575      * Option value: &name
4576      */
4577     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4578 		break;
4579 
4580     /*
4581      * Environment variable: $VAR.
4582      */
4583     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4584 		break;
4585 
4586     /*
4587      * Register contents: @r.
4588      */
4589     case '@':	++*arg;
4590 		if (evaluate)
4591 		{
4592 		    rettv->v_type = VAR_STRING;
4593 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4594 		}
4595 		if (**arg != NUL)
4596 		    ++*arg;
4597 		break;
4598 
4599     /*
4600      * nested expression: (expression).
4601      */
4602     case '(':	*arg = skipwhite(*arg + 1);
4603 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4604 		if (**arg == ')')
4605 		    ++*arg;
4606 		else if (ret == OK)
4607 		{
4608 		    EMSG(_("E110: Missing ')'"));
4609 		    clear_tv(rettv);
4610 		    ret = FAIL;
4611 		}
4612 		break;
4613 
4614     default:	ret = NOTDONE;
4615 		break;
4616     }
4617 
4618     if (ret == NOTDONE)
4619     {
4620 	/*
4621 	 * Must be a variable or function name.
4622 	 * Can also be a curly-braces kind of name: {expr}.
4623 	 */
4624 	s = *arg;
4625 	len = get_name_len(arg, &alias, evaluate, TRUE);
4626 	if (alias != NULL)
4627 	    s = alias;
4628 
4629 	if (len <= 0)
4630 	    ret = FAIL;
4631 	else
4632 	{
4633 	    if (**arg == '(')		/* recursive! */
4634 	    {
4635 		/* If "s" is the name of a variable of type VAR_FUNC
4636 		 * use its contents. */
4637 		s = deref_func_name(s, &len);
4638 
4639 		/* Invoke the function. */
4640 		ret = get_func_tv(s, len, rettv, arg,
4641 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4642 			  &len, evaluate, NULL);
4643 		/* Stop the expression evaluation when immediately
4644 		 * aborting on error, or when an interrupt occurred or
4645 		 * an exception was thrown but not caught. */
4646 		if (aborting())
4647 		{
4648 		    if (ret == OK)
4649 			clear_tv(rettv);
4650 		    ret = FAIL;
4651 		}
4652 	    }
4653 	    else if (evaluate)
4654 		ret = get_var_tv(s, len, rettv, TRUE);
4655 	    else
4656 		ret = OK;
4657 	}
4658 
4659 	if (alias != NULL)
4660 	    vim_free(alias);
4661     }
4662 
4663     *arg = skipwhite(*arg);
4664 
4665     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4666      * expr(expr). */
4667     if (ret == OK)
4668 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4669 
4670     /*
4671      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4672      */
4673     if (ret == OK && evaluate && end_leader > start_leader)
4674     {
4675 	int	    error = FALSE;
4676 
4677 	val = get_tv_number_chk(rettv, &error);
4678 	if (error)
4679 	{
4680 	    clear_tv(rettv);
4681 	    ret = FAIL;
4682 	}
4683 	else
4684 	{
4685 	    while (end_leader > start_leader)
4686 	    {
4687 		--end_leader;
4688 		if (*end_leader == '!')
4689 		    val = !val;
4690 		else if (*end_leader == '-')
4691 		    val = -val;
4692 	    }
4693 	    clear_tv(rettv);
4694 	    rettv->v_type = VAR_NUMBER;
4695 	    rettv->vval.v_number = val;
4696 	}
4697     }
4698 
4699     return ret;
4700 }
4701 
4702 /*
4703  * Evaluate an "[expr]" or "[expr:expr]" index.  Also "dict.key".
4704  * "*arg" points to the '[' or '.'.
4705  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4706  */
4707     static int
4708 eval_index(arg, rettv, evaluate, verbose)
4709     char_u	**arg;
4710     typval_T	*rettv;
4711     int		evaluate;
4712     int		verbose;	/* give error messages */
4713 {
4714     int		empty1 = FALSE, empty2 = FALSE;
4715     typval_T	var1, var2;
4716     long	n1, n2 = 0;
4717     long	len = -1;
4718     int		range = FALSE;
4719     char_u	*s;
4720     char_u	*key = NULL;
4721 
4722     if (rettv->v_type == VAR_FUNC)
4723     {
4724 	if (verbose)
4725 	    EMSG(_("E695: Cannot index a Funcref"));
4726 	return FAIL;
4727     }
4728 
4729     if (**arg == '.')
4730     {
4731 	/*
4732 	 * dict.name
4733 	 */
4734 	key = *arg + 1;
4735 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4736 	    ;
4737 	if (len == 0)
4738 	    return FAIL;
4739 	*arg = skipwhite(key + len);
4740     }
4741     else
4742     {
4743 	/*
4744 	 * something[idx]
4745 	 *
4746 	 * Get the (first) variable from inside the [].
4747 	 */
4748 	*arg = skipwhite(*arg + 1);
4749 	if (**arg == ':')
4750 	    empty1 = TRUE;
4751 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4752 	    return FAIL;
4753 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4754 	{
4755 	    /* not a number or string */
4756 	    clear_tv(&var1);
4757 	    return FAIL;
4758 	}
4759 
4760 	/*
4761 	 * Get the second variable from inside the [:].
4762 	 */
4763 	if (**arg == ':')
4764 	{
4765 	    range = TRUE;
4766 	    *arg = skipwhite(*arg + 1);
4767 	    if (**arg == ']')
4768 		empty2 = TRUE;
4769 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4770 	    {
4771 		if (!empty1)
4772 		    clear_tv(&var1);
4773 		return FAIL;
4774 	    }
4775 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4776 	    {
4777 		/* not a number or string */
4778 		if (!empty1)
4779 		    clear_tv(&var1);
4780 		clear_tv(&var2);
4781 		return FAIL;
4782 	    }
4783 	}
4784 
4785 	/* Check for the ']'. */
4786 	if (**arg != ']')
4787 	{
4788 	    if (verbose)
4789 		EMSG(_(e_missbrac));
4790 	    clear_tv(&var1);
4791 	    if (range)
4792 		clear_tv(&var2);
4793 	    return FAIL;
4794 	}
4795 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4796     }
4797 
4798     if (evaluate)
4799     {
4800 	n1 = 0;
4801 	if (!empty1 && rettv->v_type != VAR_DICT)
4802 	{
4803 	    n1 = get_tv_number(&var1);
4804 	    clear_tv(&var1);
4805 	}
4806 	if (range)
4807 	{
4808 	    if (empty2)
4809 		n2 = -1;
4810 	    else
4811 	    {
4812 		n2 = get_tv_number(&var2);
4813 		clear_tv(&var2);
4814 	    }
4815 	}
4816 
4817 	switch (rettv->v_type)
4818 	{
4819 	    case VAR_NUMBER:
4820 	    case VAR_STRING:
4821 		s = get_tv_string(rettv);
4822 		len = (long)STRLEN(s);
4823 		if (range)
4824 		{
4825 		    /* The resulting variable is a substring.  If the indexes
4826 		     * are out of range the result is empty. */
4827 		    if (n1 < 0)
4828 		    {
4829 			n1 = len + n1;
4830 			if (n1 < 0)
4831 			    n1 = 0;
4832 		    }
4833 		    if (n2 < 0)
4834 			n2 = len + n2;
4835 		    else if (n2 >= len)
4836 			n2 = len;
4837 		    if (n1 >= len || n2 < 0 || n1 > n2)
4838 			s = NULL;
4839 		    else
4840 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4841 		}
4842 		else
4843 		{
4844 		    /* The resulting variable is a string of a single
4845 		     * character.  If the index is too big or negative the
4846 		     * result is empty. */
4847 		    if (n1 >= len || n1 < 0)
4848 			s = NULL;
4849 		    else
4850 			s = vim_strnsave(s + n1, 1);
4851 		}
4852 		clear_tv(rettv);
4853 		rettv->v_type = VAR_STRING;
4854 		rettv->vval.v_string = s;
4855 		break;
4856 
4857 	    case VAR_LIST:
4858 		len = list_len(rettv->vval.v_list);
4859 		if (n1 < 0)
4860 		    n1 = len + n1;
4861 		if (!empty1 && (n1 < 0 || n1 >= len))
4862 		{
4863 		    /* For a range we allow invalid values and return an empty
4864 		     * list.  A list index out of range is an error. */
4865 		    if (!range)
4866 		    {
4867 			if (verbose)
4868 			    EMSGN(_(e_listidx), n1);
4869 			return FAIL;
4870 		    }
4871 		    n1 = len;
4872 		}
4873 		if (range)
4874 		{
4875 		    list_T	*l;
4876 		    listitem_T	*item;
4877 
4878 		    if (n2 < 0)
4879 			n2 = len + n2;
4880 		    else if (n2 >= len)
4881 			n2 = len - 1;
4882 		    if (!empty2 && (n2 < 0 || n2 + 1 < n1))
4883 			n2 = -1;
4884 		    l = list_alloc();
4885 		    if (l == NULL)
4886 			return FAIL;
4887 		    for (item = list_find(rettv->vval.v_list, n1);
4888 							       n1 <= n2; ++n1)
4889 		    {
4890 			if (list_append_tv(l, &item->li_tv) == FAIL)
4891 			{
4892 			    list_free(l);
4893 			    return FAIL;
4894 			}
4895 			item = item->li_next;
4896 		    }
4897 		    clear_tv(rettv);
4898 		    rettv->v_type = VAR_LIST;
4899 		    rettv->vval.v_list = l;
4900 		    ++l->lv_refcount;
4901 		}
4902 		else
4903 		{
4904 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1);
4905 		    clear_tv(rettv);
4906 		    *rettv = var1;
4907 		}
4908 		break;
4909 
4910 	    case VAR_DICT:
4911 		if (range)
4912 		{
4913 		    if (verbose)
4914 			EMSG(_(e_dictrange));
4915 		    if (len == -1)
4916 			clear_tv(&var1);
4917 		    return FAIL;
4918 		}
4919 		{
4920 		    dictitem_T	*item;
4921 
4922 		    if (len == -1)
4923 		    {
4924 			key = get_tv_string(&var1);
4925 			if (*key == NUL)
4926 			{
4927 			    if (verbose)
4928 				EMSG(_(e_emptykey));
4929 			    clear_tv(&var1);
4930 			    return FAIL;
4931 			}
4932 		    }
4933 
4934 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4935 
4936 		    if (item == NULL && verbose)
4937 			EMSG2(_(e_dictkey), key);
4938 		    if (len == -1)
4939 			clear_tv(&var1);
4940 		    if (item == NULL)
4941 			return FAIL;
4942 
4943 		    copy_tv(&item->di_tv, &var1);
4944 		    clear_tv(rettv);
4945 		    *rettv = var1;
4946 		}
4947 		break;
4948 	}
4949     }
4950 
4951     return OK;
4952 }
4953 
4954 /*
4955  * Get an option value.
4956  * "arg" points to the '&' or '+' before the option name.
4957  * "arg" is advanced to character after the option name.
4958  * Return OK or FAIL.
4959  */
4960     static int
4961 get_option_tv(arg, rettv, evaluate)
4962     char_u	**arg;
4963     typval_T	*rettv;	/* when NULL, only check if option exists */
4964     int		evaluate;
4965 {
4966     char_u	*option_end;
4967     long	numval;
4968     char_u	*stringval;
4969     int		opt_type;
4970     int		c;
4971     int		working = (**arg == '+');    /* has("+option") */
4972     int		ret = OK;
4973     int		opt_flags;
4974 
4975     /*
4976      * Isolate the option name and find its value.
4977      */
4978     option_end = find_option_end(arg, &opt_flags);
4979     if (option_end == NULL)
4980     {
4981 	if (rettv != NULL)
4982 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4983 	return FAIL;
4984     }
4985 
4986     if (!evaluate)
4987     {
4988 	*arg = option_end;
4989 	return OK;
4990     }
4991 
4992     c = *option_end;
4993     *option_end = NUL;
4994     opt_type = get_option_value(*arg, &numval,
4995 			       rettv == NULL ? NULL : &stringval, opt_flags);
4996 
4997     if (opt_type == -3)			/* invalid name */
4998     {
4999 	if (rettv != NULL)
5000 	    EMSG2(_("E113: Unknown option: %s"), *arg);
5001 	ret = FAIL;
5002     }
5003     else if (rettv != NULL)
5004     {
5005 	if (opt_type == -2)		/* hidden string option */
5006 	{
5007 	    rettv->v_type = VAR_STRING;
5008 	    rettv->vval.v_string = NULL;
5009 	}
5010 	else if (opt_type == -1)	/* hidden number option */
5011 	{
5012 	    rettv->v_type = VAR_NUMBER;
5013 	    rettv->vval.v_number = 0;
5014 	}
5015 	else if (opt_type == 1)		/* number option */
5016 	{
5017 	    rettv->v_type = VAR_NUMBER;
5018 	    rettv->vval.v_number = numval;
5019 	}
5020 	else				/* string option */
5021 	{
5022 	    rettv->v_type = VAR_STRING;
5023 	    rettv->vval.v_string = stringval;
5024 	}
5025     }
5026     else if (working && (opt_type == -2 || opt_type == -1))
5027 	ret = FAIL;
5028 
5029     *option_end = c;		    /* put back for error messages */
5030     *arg = option_end;
5031 
5032     return ret;
5033 }
5034 
5035 /*
5036  * Allocate a variable for a string constant.
5037  * Return OK or FAIL.
5038  */
5039     static int
5040 get_string_tv(arg, rettv, evaluate)
5041     char_u	**arg;
5042     typval_T	*rettv;
5043     int		evaluate;
5044 {
5045     char_u	*p;
5046     char_u	*name;
5047     int		extra = 0;
5048 
5049     /*
5050      * Find the end of the string, skipping backslashed characters.
5051      */
5052     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
5053     {
5054 	if (*p == '\\' && p[1] != NUL)
5055 	{
5056 	    ++p;
5057 	    /* A "\<x>" form occupies at least 4 characters, and produces up
5058 	     * to 6 characters: reserve space for 2 extra */
5059 	    if (*p == '<')
5060 		extra += 2;
5061 	}
5062     }
5063 
5064     if (*p != '"')
5065     {
5066 	EMSG2(_("E114: Missing quote: %s"), *arg);
5067 	return FAIL;
5068     }
5069 
5070     /* If only parsing, set *arg and return here */
5071     if (!evaluate)
5072     {
5073 	*arg = p + 1;
5074 	return OK;
5075     }
5076 
5077     /*
5078      * Copy the string into allocated memory, handling backslashed
5079      * characters.
5080      */
5081     name = alloc((unsigned)(p - *arg + extra));
5082     if (name == NULL)
5083 	return FAIL;
5084     rettv->v_type = VAR_STRING;
5085     rettv->vval.v_string = name;
5086 
5087     for (p = *arg + 1; *p != NUL && *p != '"'; )
5088     {
5089 	if (*p == '\\')
5090 	{
5091 	    switch (*++p)
5092 	    {
5093 		case 'b': *name++ = BS; ++p; break;
5094 		case 'e': *name++ = ESC; ++p; break;
5095 		case 'f': *name++ = FF; ++p; break;
5096 		case 'n': *name++ = NL; ++p; break;
5097 		case 'r': *name++ = CAR; ++p; break;
5098 		case 't': *name++ = TAB; ++p; break;
5099 
5100 		case 'X': /* hex: "\x1", "\x12" */
5101 		case 'x':
5102 		case 'u': /* Unicode: "\u0023" */
5103 		case 'U':
5104 			  if (vim_isxdigit(p[1]))
5105 			  {
5106 			      int	n, nr;
5107 			      int	c = toupper(*p);
5108 
5109 			      if (c == 'X')
5110 				  n = 2;
5111 			      else
5112 				  n = 4;
5113 			      nr = 0;
5114 			      while (--n >= 0 && vim_isxdigit(p[1]))
5115 			      {
5116 				  ++p;
5117 				  nr = (nr << 4) + hex2nr(*p);
5118 			      }
5119 			      ++p;
5120 #ifdef FEAT_MBYTE
5121 			      /* For "\u" store the number according to
5122 			       * 'encoding'. */
5123 			      if (c != 'X')
5124 				  name += (*mb_char2bytes)(nr, name);
5125 			      else
5126 #endif
5127 				  *name++ = nr;
5128 			  }
5129 			  break;
5130 
5131 			  /* octal: "\1", "\12", "\123" */
5132 		case '0':
5133 		case '1':
5134 		case '2':
5135 		case '3':
5136 		case '4':
5137 		case '5':
5138 		case '6':
5139 		case '7': *name = *p++ - '0';
5140 			  if (*p >= '0' && *p <= '7')
5141 			  {
5142 			      *name = (*name << 3) + *p++ - '0';
5143 			      if (*p >= '0' && *p <= '7')
5144 				  *name = (*name << 3) + *p++ - '0';
5145 			  }
5146 			  ++name;
5147 			  break;
5148 
5149 			    /* Special key, e.g.: "\<C-W>" */
5150 		case '<': extra = trans_special(&p, name, TRUE);
5151 			  if (extra != 0)
5152 			  {
5153 			      name += extra;
5154 			      break;
5155 			  }
5156 			  /* FALLTHROUGH */
5157 
5158 		default:  MB_COPY_CHAR(p, name);
5159 			  break;
5160 	    }
5161 	}
5162 	else
5163 	    MB_COPY_CHAR(p, name);
5164 
5165     }
5166     *name = NUL;
5167     *arg = p + 1;
5168 
5169     return OK;
5170 }
5171 
5172 /*
5173  * Allocate a variable for a 'str''ing' constant.
5174  * Return OK or FAIL.
5175  */
5176     static int
5177 get_lit_string_tv(arg, rettv, evaluate)
5178     char_u	**arg;
5179     typval_T	*rettv;
5180     int		evaluate;
5181 {
5182     char_u	*p;
5183     char_u	*str;
5184     int		reduce = 0;
5185 
5186     /*
5187      * Find the end of the string, skipping ''.
5188      */
5189     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5190     {
5191 	if (*p == '\'')
5192 	{
5193 	    if (p[1] != '\'')
5194 		break;
5195 	    ++reduce;
5196 	    ++p;
5197 	}
5198     }
5199 
5200     if (*p != '\'')
5201     {
5202 	EMSG2(_("E115: Missing quote: %s"), *arg);
5203 	return FAIL;
5204     }
5205 
5206     /* If only parsing return after setting "*arg" */
5207     if (!evaluate)
5208     {
5209 	*arg = p + 1;
5210 	return OK;
5211     }
5212 
5213     /*
5214      * Copy the string into allocated memory, handling '' to ' reduction.
5215      */
5216     str = alloc((unsigned)((p - *arg) - reduce));
5217     if (str == NULL)
5218 	return FAIL;
5219     rettv->v_type = VAR_STRING;
5220     rettv->vval.v_string = str;
5221 
5222     for (p = *arg + 1; *p != NUL; )
5223     {
5224 	if (*p == '\'')
5225 	{
5226 	    if (p[1] != '\'')
5227 		break;
5228 	    ++p;
5229 	}
5230 	MB_COPY_CHAR(p, str);
5231     }
5232     *str = NUL;
5233     *arg = p + 1;
5234 
5235     return OK;
5236 }
5237 
5238 /*
5239  * Allocate a variable for a List and fill it from "*arg".
5240  * Return OK or FAIL.
5241  */
5242     static int
5243 get_list_tv(arg, rettv, evaluate)
5244     char_u	**arg;
5245     typval_T	*rettv;
5246     int		evaluate;
5247 {
5248     list_T	*l = NULL;
5249     typval_T	tv;
5250     listitem_T	*item;
5251 
5252     if (evaluate)
5253     {
5254 	l = list_alloc();
5255 	if (l == NULL)
5256 	    return FAIL;
5257     }
5258 
5259     *arg = skipwhite(*arg + 1);
5260     while (**arg != ']' && **arg != NUL)
5261     {
5262 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5263 	    goto failret;
5264 	if (evaluate)
5265 	{
5266 	    item = listitem_alloc();
5267 	    if (item != NULL)
5268 	    {
5269 		item->li_tv = tv;
5270 		item->li_tv.v_lock = 0;
5271 		list_append(l, item);
5272 	    }
5273 	    else
5274 		clear_tv(&tv);
5275 	}
5276 
5277 	if (**arg == ']')
5278 	    break;
5279 	if (**arg != ',')
5280 	{
5281 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5282 	    goto failret;
5283 	}
5284 	*arg = skipwhite(*arg + 1);
5285     }
5286 
5287     if (**arg != ']')
5288     {
5289 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5290 failret:
5291 	if (evaluate)
5292 	    list_free(l);
5293 	return FAIL;
5294     }
5295 
5296     *arg = skipwhite(*arg + 1);
5297     if (evaluate)
5298     {
5299 	rettv->v_type = VAR_LIST;
5300 	rettv->vval.v_list = l;
5301 	++l->lv_refcount;
5302     }
5303 
5304     return OK;
5305 }
5306 
5307 /*
5308  * Allocate an empty header for a list.
5309  * Caller should take care of the reference count.
5310  */
5311     list_T *
5312 list_alloc()
5313 {
5314     list_T  *l;
5315 
5316     l = (list_T *)alloc_clear(sizeof(list_T));
5317     if (l != NULL)
5318     {
5319 	/* Prepend the list to the list of lists for garbage collection. */
5320 	if (first_list != NULL)
5321 	    first_list->lv_used_prev = l;
5322 	l->lv_used_prev = NULL;
5323 	l->lv_used_next = first_list;
5324 	first_list = l;
5325     }
5326     return l;
5327 }
5328 
5329 /*
5330  * Allocate an empty list for a return value.
5331  * Returns OK or FAIL.
5332  */
5333     static int
5334 rettv_list_alloc(rettv)
5335     typval_T	*rettv;
5336 {
5337     list_T	*l = list_alloc();
5338 
5339     if (l == NULL)
5340 	return FAIL;
5341 
5342     rettv->vval.v_list = l;
5343     rettv->v_type = VAR_LIST;
5344     ++l->lv_refcount;
5345     return OK;
5346 }
5347 
5348 /*
5349  * Unreference a list: decrement the reference count and free it when it
5350  * becomes zero.
5351  */
5352     void
5353 list_unref(l)
5354     list_T *l;
5355 {
5356     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5357 	list_free(l);
5358 }
5359 
5360 /*
5361  * Free a list, including all items it points to.
5362  * Ignores the reference count.
5363  */
5364     void
5365 list_free(l)
5366     list_T *l;
5367 {
5368     listitem_T *item;
5369 
5370     /* Avoid that recursive reference to the list frees us again. */
5371     l->lv_refcount = DEL_REFCOUNT;
5372 
5373     /* Remove the list from the list of lists for garbage collection. */
5374     if (l->lv_used_prev == NULL)
5375 	first_list = l->lv_used_next;
5376     else
5377 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5378     if (l->lv_used_next != NULL)
5379 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5380 
5381     for (item = l->lv_first; item != NULL; item = l->lv_first)
5382     {
5383 	/* Remove the item before deleting it. */
5384 	l->lv_first = item->li_next;
5385 	listitem_free(item);
5386     }
5387     vim_free(l);
5388 }
5389 
5390 /*
5391  * Allocate a list item.
5392  */
5393     static listitem_T *
5394 listitem_alloc()
5395 {
5396     return (listitem_T *)alloc(sizeof(listitem_T));
5397 }
5398 
5399 /*
5400  * Free a list item.  Also clears the value.  Does not notify watchers.
5401  */
5402     static void
5403 listitem_free(item)
5404     listitem_T *item;
5405 {
5406     clear_tv(&item->li_tv);
5407     vim_free(item);
5408 }
5409 
5410 /*
5411  * Remove a list item from a List and free it.  Also clears the value.
5412  */
5413     static void
5414 listitem_remove(l, item)
5415     list_T  *l;
5416     listitem_T *item;
5417 {
5418     list_remove(l, item, item);
5419     listitem_free(item);
5420 }
5421 
5422 /*
5423  * Get the number of items in a list.
5424  */
5425     static long
5426 list_len(l)
5427     list_T	*l;
5428 {
5429     if (l == NULL)
5430 	return 0L;
5431     return l->lv_len;
5432 }
5433 
5434 /*
5435  * Return TRUE when two lists have exactly the same values.
5436  */
5437     static int
5438 list_equal(l1, l2, ic)
5439     list_T	*l1;
5440     list_T	*l2;
5441     int		ic;	/* ignore case for strings */
5442 {
5443     listitem_T	*item1, *item2;
5444 
5445     if (list_len(l1) != list_len(l2))
5446 	return FALSE;
5447 
5448     for (item1 = l1->lv_first, item2 = l2->lv_first;
5449 	    item1 != NULL && item2 != NULL;
5450 			       item1 = item1->li_next, item2 = item2->li_next)
5451 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5452 	    return FALSE;
5453     return item1 == NULL && item2 == NULL;
5454 }
5455 
5456 #if defined(FEAT_PYTHON) || defined(PROTO)
5457 /*
5458  * Return the dictitem that an entry in a hashtable points to.
5459  */
5460     dictitem_T *
5461 dict_lookup(hi)
5462     hashitem_T *hi;
5463 {
5464     return HI2DI(hi);
5465 }
5466 #endif
5467 
5468 /*
5469  * Return TRUE when two dictionaries have exactly the same key/values.
5470  */
5471     static int
5472 dict_equal(d1, d2, ic)
5473     dict_T	*d1;
5474     dict_T	*d2;
5475     int		ic;	/* ignore case for strings */
5476 {
5477     hashitem_T	*hi;
5478     dictitem_T	*item2;
5479     int		todo;
5480 
5481     if (dict_len(d1) != dict_len(d2))
5482 	return FALSE;
5483 
5484     todo = (int)d1->dv_hashtab.ht_used;
5485     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5486     {
5487 	if (!HASHITEM_EMPTY(hi))
5488 	{
5489 	    item2 = dict_find(d2, hi->hi_key, -1);
5490 	    if (item2 == NULL)
5491 		return FALSE;
5492 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5493 		return FALSE;
5494 	    --todo;
5495 	}
5496     }
5497     return TRUE;
5498 }
5499 
5500 /*
5501  * Return TRUE if "tv1" and "tv2" have the same value.
5502  * Compares the items just like "==" would compare them, but strings and
5503  * numbers are different.
5504  */
5505     static int
5506 tv_equal(tv1, tv2, ic)
5507     typval_T *tv1;
5508     typval_T *tv2;
5509     int	    ic;	    /* ignore case */
5510 {
5511     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5512     char_u	*s1, *s2;
5513 
5514     if (tv1->v_type != tv2->v_type)
5515 	return FALSE;
5516 
5517     switch (tv1->v_type)
5518     {
5519 	case VAR_LIST:
5520 	    /* recursive! */
5521 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5522 
5523 	case VAR_DICT:
5524 	    /* recursive! */
5525 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5526 
5527 	case VAR_FUNC:
5528 	    return (tv1->vval.v_string != NULL
5529 		    && tv2->vval.v_string != NULL
5530 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5531 
5532 	case VAR_NUMBER:
5533 	    return tv1->vval.v_number == tv2->vval.v_number;
5534 
5535 	case VAR_STRING:
5536 	    s1 = get_tv_string_buf(tv1, buf1);
5537 	    s2 = get_tv_string_buf(tv2, buf2);
5538 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5539     }
5540 
5541     EMSG2(_(e_intern2), "tv_equal()");
5542     return TRUE;
5543 }
5544 
5545 /*
5546  * Locate item with index "n" in list "l" and return it.
5547  * A negative index is counted from the end; -1 is the last item.
5548  * Returns NULL when "n" is out of range.
5549  */
5550     static listitem_T *
5551 list_find(l, n)
5552     list_T	*l;
5553     long	n;
5554 {
5555     listitem_T	*item;
5556     long	idx;
5557 
5558     if (l == NULL)
5559 	return NULL;
5560 
5561     /* Negative index is relative to the end. */
5562     if (n < 0)
5563 	n = l->lv_len + n;
5564 
5565     /* Check for index out of range. */
5566     if (n < 0 || n >= l->lv_len)
5567 	return NULL;
5568 
5569     /* When there is a cached index may start search from there. */
5570     if (l->lv_idx_item != NULL)
5571     {
5572 	if (n < l->lv_idx / 2)
5573 	{
5574 	    /* closest to the start of the list */
5575 	    item = l->lv_first;
5576 	    idx = 0;
5577 	}
5578 	else if (n > (l->lv_idx + l->lv_len) / 2)
5579 	{
5580 	    /* closest to the end of the list */
5581 	    item = l->lv_last;
5582 	    idx = l->lv_len - 1;
5583 	}
5584 	else
5585 	{
5586 	    /* closest to the cached index */
5587 	    item = l->lv_idx_item;
5588 	    idx = l->lv_idx;
5589 	}
5590     }
5591     else
5592     {
5593 	if (n < l->lv_len / 2)
5594 	{
5595 	    /* closest to the start of the list */
5596 	    item = l->lv_first;
5597 	    idx = 0;
5598 	}
5599 	else
5600 	{
5601 	    /* closest to the end of the list */
5602 	    item = l->lv_last;
5603 	    idx = l->lv_len - 1;
5604 	}
5605     }
5606 
5607     while (n > idx)
5608     {
5609 	/* search forward */
5610 	item = item->li_next;
5611 	++idx;
5612     }
5613     while (n < idx)
5614     {
5615 	/* search backward */
5616 	item = item->li_prev;
5617 	--idx;
5618     }
5619 
5620     /* cache the used index */
5621     l->lv_idx = idx;
5622     l->lv_idx_item = item;
5623 
5624     return item;
5625 }
5626 
5627 /*
5628  * Get list item "l[idx]" as a number.
5629  */
5630     static long
5631 list_find_nr(l, idx, errorp)
5632     list_T	*l;
5633     long	idx;
5634     int		*errorp;	/* set to TRUE when something wrong */
5635 {
5636     listitem_T	*li;
5637 
5638     li = list_find(l, idx);
5639     if (li == NULL)
5640     {
5641 	if (errorp != NULL)
5642 	    *errorp = TRUE;
5643 	return -1L;
5644     }
5645     return get_tv_number_chk(&li->li_tv, errorp);
5646 }
5647 
5648 /*
5649  * Locate "item" list "l" and return its index.
5650  * Returns -1 when "item" is not in the list.
5651  */
5652     static long
5653 list_idx_of_item(l, item)
5654     list_T	*l;
5655     listitem_T	*item;
5656 {
5657     long	idx = 0;
5658     listitem_T	*li;
5659 
5660     if (l == NULL)
5661 	return -1;
5662     idx = 0;
5663     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5664 	++idx;
5665     if (li == NULL)
5666 	return -1;
5667     return idx;
5668 }
5669 
5670 /*
5671  * Append item "item" to the end of list "l".
5672  */
5673     static void
5674 list_append(l, item)
5675     list_T	*l;
5676     listitem_T	*item;
5677 {
5678     if (l->lv_last == NULL)
5679     {
5680 	/* empty list */
5681 	l->lv_first = item;
5682 	l->lv_last = item;
5683 	item->li_prev = NULL;
5684     }
5685     else
5686     {
5687 	l->lv_last->li_next = item;
5688 	item->li_prev = l->lv_last;
5689 	l->lv_last = item;
5690     }
5691     ++l->lv_len;
5692     item->li_next = NULL;
5693 }
5694 
5695 /*
5696  * Append typval_T "tv" to the end of list "l".
5697  * Return FAIL when out of memory.
5698  */
5699     static int
5700 list_append_tv(l, tv)
5701     list_T	*l;
5702     typval_T	*tv;
5703 {
5704     listitem_T	*li = listitem_alloc();
5705 
5706     if (li == NULL)
5707 	return FAIL;
5708     copy_tv(tv, &li->li_tv);
5709     list_append(l, li);
5710     return OK;
5711 }
5712 
5713 /*
5714  * Add a dictionary to a list.  Used by getqflist().
5715  * Return FAIL when out of memory.
5716  */
5717     int
5718 list_append_dict(list, dict)
5719     list_T	*list;
5720     dict_T	*dict;
5721 {
5722     listitem_T	*li = listitem_alloc();
5723 
5724     if (li == NULL)
5725 	return FAIL;
5726     li->li_tv.v_type = VAR_DICT;
5727     li->li_tv.v_lock = 0;
5728     li->li_tv.vval.v_dict = dict;
5729     list_append(list, li);
5730     ++dict->dv_refcount;
5731     return OK;
5732 }
5733 
5734 /*
5735  * Make a copy of "str" and append it as an item to list "l".
5736  * When "len" >= 0 use "str[len]".
5737  * Returns FAIL when out of memory.
5738  */
5739     static int
5740 list_append_string(l, str, len)
5741     list_T	*l;
5742     char_u	*str;
5743     int		len;
5744 {
5745     listitem_T *li = listitem_alloc();
5746 
5747     if (li == NULL)
5748 	return FAIL;
5749     list_append(l, li);
5750     li->li_tv.v_type = VAR_STRING;
5751     li->li_tv.v_lock = 0;
5752     if (str == NULL)
5753 	li->li_tv.vval.v_string = NULL;
5754     else if ((li->li_tv.vval.v_string = (len >= 0 ? vim_strnsave(str, len)
5755 						 : vim_strsave(str))) == NULL)
5756 	return FAIL;
5757     return OK;
5758 }
5759 
5760 /*
5761  * Append "n" to list "l".
5762  * Returns FAIL when out of memory.
5763  */
5764     static int
5765 list_append_number(l, n)
5766     list_T	*l;
5767     varnumber_T	n;
5768 {
5769     listitem_T	*li;
5770 
5771     li = listitem_alloc();
5772     if (li == NULL)
5773 	return FAIL;
5774     li->li_tv.v_type = VAR_NUMBER;
5775     li->li_tv.v_lock = 0;
5776     li->li_tv.vval.v_number = n;
5777     list_append(l, li);
5778     return OK;
5779 }
5780 
5781 /*
5782  * Insert typval_T "tv" in list "l" before "item".
5783  * If "item" is NULL append at the end.
5784  * Return FAIL when out of memory.
5785  */
5786     static int
5787 list_insert_tv(l, tv, item)
5788     list_T	*l;
5789     typval_T	*tv;
5790     listitem_T	*item;
5791 {
5792     listitem_T	*ni = listitem_alloc();
5793 
5794     if (ni == NULL)
5795 	return FAIL;
5796     copy_tv(tv, &ni->li_tv);
5797     if (item == NULL)
5798 	/* Append new item at end of list. */
5799 	list_append(l, ni);
5800     else
5801     {
5802 	/* Insert new item before existing item. */
5803 	ni->li_prev = item->li_prev;
5804 	ni->li_next = item;
5805 	if (item->li_prev == NULL)
5806 	{
5807 	    l->lv_first = ni;
5808 	    ++l->lv_idx;
5809 	}
5810 	else
5811 	{
5812 	    item->li_prev->li_next = ni;
5813 	    l->lv_idx_item = NULL;
5814 	}
5815 	item->li_prev = ni;
5816 	++l->lv_len;
5817     }
5818     return OK;
5819 }
5820 
5821 /*
5822  * Extend "l1" with "l2".
5823  * If "bef" is NULL append at the end, otherwise insert before this item.
5824  * Returns FAIL when out of memory.
5825  */
5826     static int
5827 list_extend(l1, l2, bef)
5828     list_T	*l1;
5829     list_T	*l2;
5830     listitem_T	*bef;
5831 {
5832     listitem_T	*item;
5833 
5834     for (item = l2->lv_first; item != NULL; item = item->li_next)
5835 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5836 	    return FAIL;
5837     return OK;
5838 }
5839 
5840 /*
5841  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5842  * Return FAIL when out of memory.
5843  */
5844     static int
5845 list_concat(l1, l2, tv)
5846     list_T	*l1;
5847     list_T	*l2;
5848     typval_T	*tv;
5849 {
5850     list_T	*l;
5851 
5852     /* make a copy of the first list. */
5853     l = list_copy(l1, FALSE, 0);
5854     if (l == NULL)
5855 	return FAIL;
5856     tv->v_type = VAR_LIST;
5857     tv->vval.v_list = l;
5858 
5859     /* append all items from the second list */
5860     return list_extend(l, l2, NULL);
5861 }
5862 
5863 /*
5864  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5865  * The refcount of the new list is set to 1.
5866  * See item_copy() for "copyID".
5867  * Returns NULL when out of memory.
5868  */
5869     static list_T *
5870 list_copy(orig, deep, copyID)
5871     list_T	*orig;
5872     int		deep;
5873     int		copyID;
5874 {
5875     list_T	*copy;
5876     listitem_T	*item;
5877     listitem_T	*ni;
5878 
5879     if (orig == NULL)
5880 	return NULL;
5881 
5882     copy = list_alloc();
5883     if (copy != NULL)
5884     {
5885 	if (copyID != 0)
5886 	{
5887 	    /* Do this before adding the items, because one of the items may
5888 	     * refer back to this list. */
5889 	    orig->lv_copyID = copyID;
5890 	    orig->lv_copylist = copy;
5891 	}
5892 	for (item = orig->lv_first; item != NULL && !got_int;
5893 							 item = item->li_next)
5894 	{
5895 	    ni = listitem_alloc();
5896 	    if (ni == NULL)
5897 		break;
5898 	    if (deep)
5899 	    {
5900 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5901 		{
5902 		    vim_free(ni);
5903 		    break;
5904 		}
5905 	    }
5906 	    else
5907 		copy_tv(&item->li_tv, &ni->li_tv);
5908 	    list_append(copy, ni);
5909 	}
5910 	++copy->lv_refcount;
5911 	if (item != NULL)
5912 	{
5913 	    list_unref(copy);
5914 	    copy = NULL;
5915 	}
5916     }
5917 
5918     return copy;
5919 }
5920 
5921 /*
5922  * Remove items "item" to "item2" from list "l".
5923  * Does not free the listitem or the value!
5924  */
5925     static void
5926 list_remove(l, item, item2)
5927     list_T	*l;
5928     listitem_T	*item;
5929     listitem_T	*item2;
5930 {
5931     listitem_T	*ip;
5932 
5933     /* notify watchers */
5934     for (ip = item; ip != NULL; ip = ip->li_next)
5935     {
5936 	--l->lv_len;
5937 	list_fix_watch(l, ip);
5938 	if (ip == item2)
5939 	    break;
5940     }
5941 
5942     if (item2->li_next == NULL)
5943 	l->lv_last = item->li_prev;
5944     else
5945 	item2->li_next->li_prev = item->li_prev;
5946     if (item->li_prev == NULL)
5947 	l->lv_first = item2->li_next;
5948     else
5949 	item->li_prev->li_next = item2->li_next;
5950     l->lv_idx_item = NULL;
5951 }
5952 
5953 /*
5954  * Return an allocated string with the string representation of a list.
5955  * May return NULL.
5956  */
5957     static char_u *
5958 list2string(tv, copyID)
5959     typval_T	*tv;
5960     int		copyID;
5961 {
5962     garray_T	ga;
5963 
5964     if (tv->vval.v_list == NULL)
5965 	return NULL;
5966     ga_init2(&ga, (int)sizeof(char), 80);
5967     ga_append(&ga, '[');
5968     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE, copyID) == FAIL)
5969     {
5970 	vim_free(ga.ga_data);
5971 	return NULL;
5972     }
5973     ga_append(&ga, ']');
5974     ga_append(&ga, NUL);
5975     return (char_u *)ga.ga_data;
5976 }
5977 
5978 /*
5979  * Join list "l" into a string in "*gap", using separator "sep".
5980  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5981  * Return FAIL or OK.
5982  */
5983     static int
5984 list_join(gap, l, sep, echo, copyID)
5985     garray_T	*gap;
5986     list_T	*l;
5987     char_u	*sep;
5988     int		echo;
5989     int		copyID;
5990 {
5991     int		first = TRUE;
5992     char_u	*tofree;
5993     char_u	numbuf[NUMBUFLEN];
5994     listitem_T	*item;
5995     char_u	*s;
5996 
5997     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5998     {
5999 	if (first)
6000 	    first = FALSE;
6001 	else
6002 	    ga_concat(gap, sep);
6003 
6004 	if (echo)
6005 	    s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
6006 	else
6007 	    s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
6008 	if (s != NULL)
6009 	    ga_concat(gap, s);
6010 	vim_free(tofree);
6011 	if (s == NULL)
6012 	    return FAIL;
6013     }
6014     return OK;
6015 }
6016 
6017 /*
6018  * Garbage collection for lists and dictionaries.
6019  *
6020  * We use reference counts to be able to free most items right away when they
6021  * are no longer used.  But for composite items it's possible that it becomes
6022  * unused while the reference count is > 0: When there is a recursive
6023  * reference.  Example:
6024  *	:let l = [1, 2, 3]
6025  *	:let d = {9: l}
6026  *	:let l[1] = d
6027  *
6028  * Since this is quite unusual we handle this with garbage collection: every
6029  * once in a while find out which lists and dicts are not referenced from any
6030  * variable.
6031  *
6032  * Here is a good reference text about garbage collection (refers to Python
6033  * but it applies to all reference-counting mechanisms):
6034  *	http://python.ca/nas/python/gc/
6035  */
6036 
6037 /*
6038  * Do garbage collection for lists and dicts.
6039  * Return TRUE if some memory was freed.
6040  */
6041     int
6042 garbage_collect()
6043 {
6044     dict_T	*dd;
6045     list_T	*ll;
6046     int		copyID = ++current_copyID;
6047     buf_T	*buf;
6048     win_T	*wp;
6049     int		i;
6050     funccall_T	*fc;
6051     int		did_free = FALSE;
6052 #ifdef FEAT_WINDOWS
6053     tabpage_T	*tp;
6054 #endif
6055 
6056     /*
6057      * 1. Go through all accessible variables and mark all lists and dicts
6058      *    with copyID.
6059      */
6060     /* script-local variables */
6061     for (i = 1; i <= ga_scripts.ga_len; ++i)
6062 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
6063 
6064     /* buffer-local variables */
6065     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
6066 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
6067 
6068     /* window-local variables */
6069     FOR_ALL_TAB_WINDOWS(tp, wp)
6070 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
6071 
6072 #ifdef FEAT_WINDOWS
6073     /* tabpage-local variables */
6074     for (tp = first_tabpage; tp != NULL; tp = tp->tp_next)
6075 	set_ref_in_ht(&tp->tp_vars.dv_hashtab, copyID);
6076 #endif
6077 
6078     /* global variables */
6079     set_ref_in_ht(&globvarht, copyID);
6080 
6081     /* function-local variables */
6082     for (fc = current_funccal; fc != NULL; fc = fc->caller)
6083     {
6084 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
6085 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
6086     }
6087 
6088     /*
6089      * 2. Go through the list of dicts and free items without the copyID.
6090      */
6091     for (dd = first_dict; dd != NULL; )
6092 	if (dd->dv_copyID != copyID)
6093 	{
6094 	    dict_free(dd);
6095 	    did_free = TRUE;
6096 
6097 	    /* restart, next dict may also have been freed */
6098 	    dd = first_dict;
6099 	}
6100 	else
6101 	    dd = dd->dv_used_next;
6102 
6103     /*
6104      * 3. Go through the list of lists and free items without the copyID.
6105      *    But don't free a list that has a watcher (used in a for loop), these
6106      *    are not referenced anywhere.
6107      */
6108     for (ll = first_list; ll != NULL; )
6109 	if (ll->lv_copyID != copyID && ll->lv_watch == NULL)
6110 	{
6111 	    list_free(ll);
6112 	    did_free = TRUE;
6113 
6114 	    /* restart, next list may also have been freed */
6115 	    ll = first_list;
6116 	}
6117 	else
6118 	    ll = ll->lv_used_next;
6119 
6120     return did_free;
6121 }
6122 
6123 /*
6124  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
6125  */
6126     static void
6127 set_ref_in_ht(ht, copyID)
6128     hashtab_T	*ht;
6129     int		copyID;
6130 {
6131     int		todo;
6132     hashitem_T	*hi;
6133 
6134     todo = (int)ht->ht_used;
6135     for (hi = ht->ht_array; todo > 0; ++hi)
6136 	if (!HASHITEM_EMPTY(hi))
6137 	{
6138 	    --todo;
6139 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
6140 	}
6141 }
6142 
6143 /*
6144  * Mark all lists and dicts referenced through list "l" with "copyID".
6145  */
6146     static void
6147 set_ref_in_list(l, copyID)
6148     list_T	*l;
6149     int		copyID;
6150 {
6151     listitem_T *li;
6152 
6153     for (li = l->lv_first; li != NULL; li = li->li_next)
6154 	set_ref_in_item(&li->li_tv, copyID);
6155 }
6156 
6157 /*
6158  * Mark all lists and dicts referenced through typval "tv" with "copyID".
6159  */
6160     static void
6161 set_ref_in_item(tv, copyID)
6162     typval_T	*tv;
6163     int		copyID;
6164 {
6165     dict_T	*dd;
6166     list_T	*ll;
6167 
6168     switch (tv->v_type)
6169     {
6170 	case VAR_DICT:
6171 	    dd = tv->vval.v_dict;
6172 	    if (dd->dv_copyID != copyID)
6173 	    {
6174 		/* Didn't see this dict yet. */
6175 		dd->dv_copyID = copyID;
6176 		set_ref_in_ht(&dd->dv_hashtab, copyID);
6177 	    }
6178 	    break;
6179 
6180 	case VAR_LIST:
6181 	    ll = tv->vval.v_list;
6182 	    if (ll->lv_copyID != copyID)
6183 	    {
6184 		/* Didn't see this list yet. */
6185 		ll->lv_copyID = copyID;
6186 		set_ref_in_list(ll, copyID);
6187 	    }
6188 	    break;
6189     }
6190     return;
6191 }
6192 
6193 /*
6194  * Allocate an empty header for a dictionary.
6195  */
6196     dict_T *
6197 dict_alloc()
6198 {
6199     dict_T *d;
6200 
6201     d = (dict_T *)alloc(sizeof(dict_T));
6202     if (d != NULL)
6203     {
6204 	/* Add the list to the hashtable for garbage collection. */
6205 	if (first_dict != NULL)
6206 	    first_dict->dv_used_prev = d;
6207 	d->dv_used_next = first_dict;
6208 	d->dv_used_prev = NULL;
6209 
6210 	hash_init(&d->dv_hashtab);
6211 	d->dv_lock = 0;
6212 	d->dv_refcount = 0;
6213 	d->dv_copyID = 0;
6214     }
6215     return d;
6216 }
6217 
6218 /*
6219  * Unreference a Dictionary: decrement the reference count and free it when it
6220  * becomes zero.
6221  */
6222     static void
6223 dict_unref(d)
6224     dict_T *d;
6225 {
6226     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
6227 	dict_free(d);
6228 }
6229 
6230 /*
6231  * Free a Dictionary, including all items it contains.
6232  * Ignores the reference count.
6233  */
6234     static void
6235 dict_free(d)
6236     dict_T *d;
6237 {
6238     int		todo;
6239     hashitem_T	*hi;
6240     dictitem_T	*di;
6241 
6242     /* Avoid that recursive reference to the dict frees us again. */
6243     d->dv_refcount = DEL_REFCOUNT;
6244 
6245     /* Remove the dict from the list of dicts for garbage collection. */
6246     if (d->dv_used_prev == NULL)
6247 	first_dict = d->dv_used_next;
6248     else
6249 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6250     if (d->dv_used_next != NULL)
6251 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6252 
6253     /* Lock the hashtab, we don't want it to resize while freeing items. */
6254     hash_lock(&d->dv_hashtab);
6255     todo = (int)d->dv_hashtab.ht_used;
6256     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6257     {
6258 	if (!HASHITEM_EMPTY(hi))
6259 	{
6260 	    /* Remove the item before deleting it, just in case there is
6261 	     * something recursive causing trouble. */
6262 	    di = HI2DI(hi);
6263 	    hash_remove(&d->dv_hashtab, hi);
6264 	    dictitem_free(di);
6265 	    --todo;
6266 	}
6267     }
6268     hash_clear(&d->dv_hashtab);
6269     vim_free(d);
6270 }
6271 
6272 /*
6273  * Allocate a Dictionary item.
6274  * The "key" is copied to the new item.
6275  * Note that the value of the item "di_tv" still needs to be initialized!
6276  * Returns NULL when out of memory.
6277  */
6278     static dictitem_T *
6279 dictitem_alloc(key)
6280     char_u	*key;
6281 {
6282     dictitem_T *di;
6283 
6284     di = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T) + STRLEN(key)));
6285     if (di != NULL)
6286     {
6287 	STRCPY(di->di_key, key);
6288 	di->di_flags = 0;
6289     }
6290     return di;
6291 }
6292 
6293 /*
6294  * Make a copy of a Dictionary item.
6295  */
6296     static dictitem_T *
6297 dictitem_copy(org)
6298     dictitem_T *org;
6299 {
6300     dictitem_T *di;
6301 
6302     di = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
6303 						      + STRLEN(org->di_key)));
6304     if (di != NULL)
6305     {
6306 	STRCPY(di->di_key, org->di_key);
6307 	di->di_flags = 0;
6308 	copy_tv(&org->di_tv, &di->di_tv);
6309     }
6310     return di;
6311 }
6312 
6313 /*
6314  * Remove item "item" from Dictionary "dict" and free it.
6315  */
6316     static void
6317 dictitem_remove(dict, item)
6318     dict_T	*dict;
6319     dictitem_T	*item;
6320 {
6321     hashitem_T	*hi;
6322 
6323     hi = hash_find(&dict->dv_hashtab, item->di_key);
6324     if (HASHITEM_EMPTY(hi))
6325 	EMSG2(_(e_intern2), "dictitem_remove()");
6326     else
6327 	hash_remove(&dict->dv_hashtab, hi);
6328     dictitem_free(item);
6329 }
6330 
6331 /*
6332  * Free a dict item.  Also clears the value.
6333  */
6334     static void
6335 dictitem_free(item)
6336     dictitem_T *item;
6337 {
6338     clear_tv(&item->di_tv);
6339     vim_free(item);
6340 }
6341 
6342 /*
6343  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6344  * The refcount of the new dict is set to 1.
6345  * See item_copy() for "copyID".
6346  * Returns NULL when out of memory.
6347  */
6348     static dict_T *
6349 dict_copy(orig, deep, copyID)
6350     dict_T	*orig;
6351     int		deep;
6352     int		copyID;
6353 {
6354     dict_T	*copy;
6355     dictitem_T	*di;
6356     int		todo;
6357     hashitem_T	*hi;
6358 
6359     if (orig == NULL)
6360 	return NULL;
6361 
6362     copy = dict_alloc();
6363     if (copy != NULL)
6364     {
6365 	if (copyID != 0)
6366 	{
6367 	    orig->dv_copyID = copyID;
6368 	    orig->dv_copydict = copy;
6369 	}
6370 	todo = (int)orig->dv_hashtab.ht_used;
6371 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6372 	{
6373 	    if (!HASHITEM_EMPTY(hi))
6374 	    {
6375 		--todo;
6376 
6377 		di = dictitem_alloc(hi->hi_key);
6378 		if (di == NULL)
6379 		    break;
6380 		if (deep)
6381 		{
6382 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6383 							      copyID) == FAIL)
6384 		    {
6385 			vim_free(di);
6386 			break;
6387 		    }
6388 		}
6389 		else
6390 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6391 		if (dict_add(copy, di) == FAIL)
6392 		{
6393 		    dictitem_free(di);
6394 		    break;
6395 		}
6396 	    }
6397 	}
6398 
6399 	++copy->dv_refcount;
6400 	if (todo > 0)
6401 	{
6402 	    dict_unref(copy);
6403 	    copy = NULL;
6404 	}
6405     }
6406 
6407     return copy;
6408 }
6409 
6410 /*
6411  * Add item "item" to Dictionary "d".
6412  * Returns FAIL when out of memory and when key already existed.
6413  */
6414     static int
6415 dict_add(d, item)
6416     dict_T	*d;
6417     dictitem_T	*item;
6418 {
6419     return hash_add(&d->dv_hashtab, item->di_key);
6420 }
6421 
6422 /*
6423  * Add a number or string entry to dictionary "d".
6424  * When "str" is NULL use number "nr", otherwise use "str".
6425  * Returns FAIL when out of memory and when key already exists.
6426  */
6427     int
6428 dict_add_nr_str(d, key, nr, str)
6429     dict_T	*d;
6430     char	*key;
6431     long	nr;
6432     char_u	*str;
6433 {
6434     dictitem_T	*item;
6435 
6436     item = dictitem_alloc((char_u *)key);
6437     if (item == NULL)
6438 	return FAIL;
6439     item->di_tv.v_lock = 0;
6440     if (str == NULL)
6441     {
6442 	item->di_tv.v_type = VAR_NUMBER;
6443 	item->di_tv.vval.v_number = nr;
6444     }
6445     else
6446     {
6447 	item->di_tv.v_type = VAR_STRING;
6448 	item->di_tv.vval.v_string = vim_strsave(str);
6449     }
6450     if (dict_add(d, item) == FAIL)
6451     {
6452 	dictitem_free(item);
6453 	return FAIL;
6454     }
6455     return OK;
6456 }
6457 
6458 /*
6459  * Get the number of items in a Dictionary.
6460  */
6461     static long
6462 dict_len(d)
6463     dict_T	*d;
6464 {
6465     if (d == NULL)
6466 	return 0L;
6467     return (long)d->dv_hashtab.ht_used;
6468 }
6469 
6470 /*
6471  * Find item "key[len]" in Dictionary "d".
6472  * If "len" is negative use strlen(key).
6473  * Returns NULL when not found.
6474  */
6475     static dictitem_T *
6476 dict_find(d, key, len)
6477     dict_T	*d;
6478     char_u	*key;
6479     int		len;
6480 {
6481 #define AKEYLEN 200
6482     char_u	buf[AKEYLEN];
6483     char_u	*akey;
6484     char_u	*tofree = NULL;
6485     hashitem_T	*hi;
6486 
6487     if (len < 0)
6488 	akey = key;
6489     else if (len >= AKEYLEN)
6490     {
6491 	tofree = akey = vim_strnsave(key, len);
6492 	if (akey == NULL)
6493 	    return NULL;
6494     }
6495     else
6496     {
6497 	/* Avoid a malloc/free by using buf[]. */
6498 	vim_strncpy(buf, key, len);
6499 	akey = buf;
6500     }
6501 
6502     hi = hash_find(&d->dv_hashtab, akey);
6503     vim_free(tofree);
6504     if (HASHITEM_EMPTY(hi))
6505 	return NULL;
6506     return HI2DI(hi);
6507 }
6508 
6509 /*
6510  * Get a string item from a dictionary.
6511  * When "save" is TRUE allocate memory for it.
6512  * Returns NULL if the entry doesn't exist or out of memory.
6513  */
6514     char_u *
6515 get_dict_string(d, key, save)
6516     dict_T	*d;
6517     char_u	*key;
6518     int		save;
6519 {
6520     dictitem_T	*di;
6521     char_u	*s;
6522 
6523     di = dict_find(d, key, -1);
6524     if (di == NULL)
6525 	return NULL;
6526     s = get_tv_string(&di->di_tv);
6527     if (save && s != NULL)
6528 	s = vim_strsave(s);
6529     return s;
6530 }
6531 
6532 /*
6533  * Get a number item from a dictionary.
6534  * Returns 0 if the entry doesn't exist or out of memory.
6535  */
6536     long
6537 get_dict_number(d, key)
6538     dict_T	*d;
6539     char_u	*key;
6540 {
6541     dictitem_T	*di;
6542 
6543     di = dict_find(d, key, -1);
6544     if (di == NULL)
6545 	return 0;
6546     return get_tv_number(&di->di_tv);
6547 }
6548 
6549 /*
6550  * Return an allocated string with the string representation of a Dictionary.
6551  * May return NULL.
6552  */
6553     static char_u *
6554 dict2string(tv, copyID)
6555     typval_T	*tv;
6556     int		copyID;
6557 {
6558     garray_T	ga;
6559     int		first = TRUE;
6560     char_u	*tofree;
6561     char_u	numbuf[NUMBUFLEN];
6562     hashitem_T	*hi;
6563     char_u	*s;
6564     dict_T	*d;
6565     int		todo;
6566 
6567     if ((d = tv->vval.v_dict) == NULL)
6568 	return NULL;
6569     ga_init2(&ga, (int)sizeof(char), 80);
6570     ga_append(&ga, '{');
6571 
6572     todo = (int)d->dv_hashtab.ht_used;
6573     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6574     {
6575 	if (!HASHITEM_EMPTY(hi))
6576 	{
6577 	    --todo;
6578 
6579 	    if (first)
6580 		first = FALSE;
6581 	    else
6582 		ga_concat(&ga, (char_u *)", ");
6583 
6584 	    tofree = string_quote(hi->hi_key, FALSE);
6585 	    if (tofree != NULL)
6586 	    {
6587 		ga_concat(&ga, tofree);
6588 		vim_free(tofree);
6589 	    }
6590 	    ga_concat(&ga, (char_u *)": ");
6591 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
6592 	    if (s != NULL)
6593 		ga_concat(&ga, s);
6594 	    vim_free(tofree);
6595 	    if (s == NULL)
6596 		break;
6597 	}
6598     }
6599     if (todo > 0)
6600     {
6601 	vim_free(ga.ga_data);
6602 	return NULL;
6603     }
6604 
6605     ga_append(&ga, '}');
6606     ga_append(&ga, NUL);
6607     return (char_u *)ga.ga_data;
6608 }
6609 
6610 /*
6611  * Allocate a variable for a Dictionary and fill it from "*arg".
6612  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6613  */
6614     static int
6615 get_dict_tv(arg, rettv, evaluate)
6616     char_u	**arg;
6617     typval_T	*rettv;
6618     int		evaluate;
6619 {
6620     dict_T	*d = NULL;
6621     typval_T	tvkey;
6622     typval_T	tv;
6623     char_u	*key;
6624     dictitem_T	*item;
6625     char_u	*start = skipwhite(*arg + 1);
6626     char_u	buf[NUMBUFLEN];
6627 
6628     /*
6629      * First check if it's not a curly-braces thing: {expr}.
6630      * Must do this without evaluating, otherwise a function may be called
6631      * twice.  Unfortunately this means we need to call eval1() twice for the
6632      * first item.
6633      * But {} is an empty Dictionary.
6634      */
6635     if (*start != '}')
6636     {
6637 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6638 	    return FAIL;
6639 	if (*start == '}')
6640 	    return NOTDONE;
6641     }
6642 
6643     if (evaluate)
6644     {
6645 	d = dict_alloc();
6646 	if (d == NULL)
6647 	    return FAIL;
6648     }
6649     tvkey.v_type = VAR_UNKNOWN;
6650     tv.v_type = VAR_UNKNOWN;
6651 
6652     *arg = skipwhite(*arg + 1);
6653     while (**arg != '}' && **arg != NUL)
6654     {
6655 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6656 	    goto failret;
6657 	if (**arg != ':')
6658 	{
6659 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6660 	    clear_tv(&tvkey);
6661 	    goto failret;
6662 	}
6663 	key = get_tv_string_buf_chk(&tvkey, buf);
6664 	if (key == NULL || *key == NUL)
6665 	{
6666 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6667 	    if (key != NULL)
6668 		EMSG(_(e_emptykey));
6669 	    clear_tv(&tvkey);
6670 	    goto failret;
6671 	}
6672 
6673 	*arg = skipwhite(*arg + 1);
6674 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6675 	{
6676 	    clear_tv(&tvkey);
6677 	    goto failret;
6678 	}
6679 	if (evaluate)
6680 	{
6681 	    item = dict_find(d, key, -1);
6682 	    if (item != NULL)
6683 	    {
6684 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6685 		clear_tv(&tvkey);
6686 		clear_tv(&tv);
6687 		goto failret;
6688 	    }
6689 	    item = dictitem_alloc(key);
6690 	    clear_tv(&tvkey);
6691 	    if (item != NULL)
6692 	    {
6693 		item->di_tv = tv;
6694 		item->di_tv.v_lock = 0;
6695 		if (dict_add(d, item) == FAIL)
6696 		    dictitem_free(item);
6697 	    }
6698 	}
6699 
6700 	if (**arg == '}')
6701 	    break;
6702 	if (**arg != ',')
6703 	{
6704 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6705 	    goto failret;
6706 	}
6707 	*arg = skipwhite(*arg + 1);
6708     }
6709 
6710     if (**arg != '}')
6711     {
6712 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6713 failret:
6714 	if (evaluate)
6715 	    dict_free(d);
6716 	return FAIL;
6717     }
6718 
6719     *arg = skipwhite(*arg + 1);
6720     if (evaluate)
6721     {
6722 	rettv->v_type = VAR_DICT;
6723 	rettv->vval.v_dict = d;
6724 	++d->dv_refcount;
6725     }
6726 
6727     return OK;
6728 }
6729 
6730 /*
6731  * Return a string with the string representation of a variable.
6732  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6733  * "numbuf" is used for a number.
6734  * Does not put quotes around strings, as ":echo" displays values.
6735  * When "copyID" is not NULL replace recursive lists and dicts with "...".
6736  * May return NULL;
6737  */
6738     static char_u *
6739 echo_string(tv, tofree, numbuf, copyID)
6740     typval_T	*tv;
6741     char_u	**tofree;
6742     char_u	*numbuf;
6743     int		copyID;
6744 {
6745     static int	recurse = 0;
6746     char_u	*r = NULL;
6747 
6748     if (recurse >= DICT_MAXNEST)
6749     {
6750 	EMSG(_("E724: variable nested too deep for displaying"));
6751 	*tofree = NULL;
6752 	return NULL;
6753     }
6754     ++recurse;
6755 
6756     switch (tv->v_type)
6757     {
6758 	case VAR_FUNC:
6759 	    *tofree = NULL;
6760 	    r = tv->vval.v_string;
6761 	    break;
6762 
6763 	case VAR_LIST:
6764 	    if (tv->vval.v_list == NULL)
6765 	    {
6766 		*tofree = NULL;
6767 		r = NULL;
6768 	    }
6769 	    else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID)
6770 	    {
6771 		*tofree = NULL;
6772 		r = (char_u *)"[...]";
6773 	    }
6774 	    else
6775 	    {
6776 		tv->vval.v_list->lv_copyID = copyID;
6777 		*tofree = list2string(tv, copyID);
6778 		r = *tofree;
6779 	    }
6780 	    break;
6781 
6782 	case VAR_DICT:
6783 	    if (tv->vval.v_dict == NULL)
6784 	    {
6785 		*tofree = NULL;
6786 		r = NULL;
6787 	    }
6788 	    else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID)
6789 	    {
6790 		*tofree = NULL;
6791 		r = (char_u *)"{...}";
6792 	    }
6793 	    else
6794 	    {
6795 		tv->vval.v_dict->dv_copyID = copyID;
6796 		*tofree = dict2string(tv, copyID);
6797 		r = *tofree;
6798 	    }
6799 	    break;
6800 
6801 	case VAR_STRING:
6802 	case VAR_NUMBER:
6803 	    *tofree = NULL;
6804 	    r = get_tv_string_buf(tv, numbuf);
6805 	    break;
6806 
6807 	default:
6808 	    EMSG2(_(e_intern2), "echo_string()");
6809 	    *tofree = NULL;
6810     }
6811 
6812     --recurse;
6813     return r;
6814 }
6815 
6816 /*
6817  * Return a string with the string representation of a variable.
6818  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6819  * "numbuf" is used for a number.
6820  * Puts quotes around strings, so that they can be parsed back by eval().
6821  * May return NULL;
6822  */
6823     static char_u *
6824 tv2string(tv, tofree, numbuf, copyID)
6825     typval_T	*tv;
6826     char_u	**tofree;
6827     char_u	*numbuf;
6828     int		copyID;
6829 {
6830     switch (tv->v_type)
6831     {
6832 	case VAR_FUNC:
6833 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6834 	    return *tofree;
6835 	case VAR_STRING:
6836 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6837 	    return *tofree;
6838 	case VAR_NUMBER:
6839 	case VAR_LIST:
6840 	case VAR_DICT:
6841 	    break;
6842 	default:
6843 	    EMSG2(_(e_intern2), "tv2string()");
6844     }
6845     return echo_string(tv, tofree, numbuf, copyID);
6846 }
6847 
6848 /*
6849  * Return string "str" in ' quotes, doubling ' characters.
6850  * If "str" is NULL an empty string is assumed.
6851  * If "function" is TRUE make it function('string').
6852  */
6853     static char_u *
6854 string_quote(str, function)
6855     char_u	*str;
6856     int		function;
6857 {
6858     unsigned	len;
6859     char_u	*p, *r, *s;
6860 
6861     len = (function ? 13 : 3);
6862     if (str != NULL)
6863     {
6864 	len += (unsigned)STRLEN(str);
6865 	for (p = str; *p != NUL; mb_ptr_adv(p))
6866 	    if (*p == '\'')
6867 		++len;
6868     }
6869     s = r = alloc(len);
6870     if (r != NULL)
6871     {
6872 	if (function)
6873 	{
6874 	    STRCPY(r, "function('");
6875 	    r += 10;
6876 	}
6877 	else
6878 	    *r++ = '\'';
6879 	if (str != NULL)
6880 	    for (p = str; *p != NUL; )
6881 	    {
6882 		if (*p == '\'')
6883 		    *r++ = '\'';
6884 		MB_COPY_CHAR(p, r);
6885 	    }
6886 	*r++ = '\'';
6887 	if (function)
6888 	    *r++ = ')';
6889 	*r++ = NUL;
6890     }
6891     return s;
6892 }
6893 
6894 /*
6895  * Get the value of an environment variable.
6896  * "arg" is pointing to the '$'.  It is advanced to after the name.
6897  * If the environment variable was not set, silently assume it is empty.
6898  * Always return OK.
6899  */
6900     static int
6901 get_env_tv(arg, rettv, evaluate)
6902     char_u	**arg;
6903     typval_T	*rettv;
6904     int		evaluate;
6905 {
6906     char_u	*string = NULL;
6907     int		len;
6908     int		cc;
6909     char_u	*name;
6910     int		mustfree = FALSE;
6911 
6912     ++*arg;
6913     name = *arg;
6914     len = get_env_len(arg);
6915     if (evaluate)
6916     {
6917 	if (len != 0)
6918 	{
6919 	    cc = name[len];
6920 	    name[len] = NUL;
6921 	    /* first try vim_getenv(), fast for normal environment vars */
6922 	    string = vim_getenv(name, &mustfree);
6923 	    if (string != NULL && *string != NUL)
6924 	    {
6925 		if (!mustfree)
6926 		    string = vim_strsave(string);
6927 	    }
6928 	    else
6929 	    {
6930 		if (mustfree)
6931 		    vim_free(string);
6932 
6933 		/* next try expanding things like $VIM and ${HOME} */
6934 		string = expand_env_save(name - 1);
6935 		if (string != NULL && *string == '$')
6936 		{
6937 		    vim_free(string);
6938 		    string = NULL;
6939 		}
6940 	    }
6941 	    name[len] = cc;
6942 	}
6943 	rettv->v_type = VAR_STRING;
6944 	rettv->vval.v_string = string;
6945     }
6946 
6947     return OK;
6948 }
6949 
6950 /*
6951  * Array with names and number of arguments of all internal functions
6952  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6953  */
6954 static struct fst
6955 {
6956     char	*f_name;	/* function name */
6957     char	f_min_argc;	/* minimal number of arguments */
6958     char	f_max_argc;	/* maximal number of arguments */
6959     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6960 				/* implemenation of function */
6961 } functions[] =
6962 {
6963     {"add",		2, 2, f_add},
6964     {"append",		2, 2, f_append},
6965     {"argc",		0, 0, f_argc},
6966     {"argidx",		0, 0, f_argidx},
6967     {"argv",		0, 1, f_argv},
6968     {"browse",		4, 4, f_browse},
6969     {"browsedir",	2, 2, f_browsedir},
6970     {"bufexists",	1, 1, f_bufexists},
6971     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6972     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6973     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6974     {"buflisted",	1, 1, f_buflisted},
6975     {"bufloaded",	1, 1, f_bufloaded},
6976     {"bufname",		1, 1, f_bufname},
6977     {"bufnr",		1, 2, f_bufnr},
6978     {"bufwinnr",	1, 1, f_bufwinnr},
6979     {"byte2line",	1, 1, f_byte2line},
6980     {"byteidx",		2, 2, f_byteidx},
6981     {"call",		2, 3, f_call},
6982     {"changenr",	0, 0, f_changenr},
6983     {"char2nr",		1, 1, f_char2nr},
6984     {"cindent",		1, 1, f_cindent},
6985     {"col",		1, 1, f_col},
6986 #if defined(FEAT_INS_EXPAND)
6987     {"complete",	2, 2, f_complete},
6988     {"complete_add",	1, 1, f_complete_add},
6989     {"complete_check",	0, 0, f_complete_check},
6990 #endif
6991     {"confirm",		1, 4, f_confirm},
6992     {"copy",		1, 1, f_copy},
6993     {"count",		2, 4, f_count},
6994     {"cscope_connection",0,3, f_cscope_connection},
6995     {"cursor",		1, 3, f_cursor},
6996     {"deepcopy",	1, 2, f_deepcopy},
6997     {"delete",		1, 1, f_delete},
6998     {"did_filetype",	0, 0, f_did_filetype},
6999     {"diff_filler",	1, 1, f_diff_filler},
7000     {"diff_hlID",	2, 2, f_diff_hlID},
7001     {"empty",		1, 1, f_empty},
7002     {"escape",		2, 2, f_escape},
7003     {"eval",		1, 1, f_eval},
7004     {"eventhandler",	0, 0, f_eventhandler},
7005     {"executable",	1, 1, f_executable},
7006     {"exists",		1, 1, f_exists},
7007     {"expand",		1, 2, f_expand},
7008     {"extend",		2, 3, f_extend},
7009     {"feedkeys",	1, 2, f_feedkeys},
7010     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
7011     {"filereadable",	1, 1, f_filereadable},
7012     {"filewritable",	1, 1, f_filewritable},
7013     {"filter",		2, 2, f_filter},
7014     {"finddir",		1, 3, f_finddir},
7015     {"findfile",	1, 3, f_findfile},
7016     {"fnamemodify",	2, 2, f_fnamemodify},
7017     {"foldclosed",	1, 1, f_foldclosed},
7018     {"foldclosedend",	1, 1, f_foldclosedend},
7019     {"foldlevel",	1, 1, f_foldlevel},
7020     {"foldtext",	0, 0, f_foldtext},
7021     {"foldtextresult",	1, 1, f_foldtextresult},
7022     {"foreground",	0, 0, f_foreground},
7023     {"function",	1, 1, f_function},
7024     {"garbagecollect",	0, 0, f_garbagecollect},
7025     {"get",		2, 3, f_get},
7026     {"getbufline",	2, 3, f_getbufline},
7027     {"getbufvar",	2, 2, f_getbufvar},
7028     {"getchar",		0, 1, f_getchar},
7029     {"getcharmod",	0, 0, f_getcharmod},
7030     {"getcmdline",	0, 0, f_getcmdline},
7031     {"getcmdpos",	0, 0, f_getcmdpos},
7032     {"getcmdtype",	0, 0, f_getcmdtype},
7033     {"getcwd",		0, 0, f_getcwd},
7034     {"getfontname",	0, 1, f_getfontname},
7035     {"getfperm",	1, 1, f_getfperm},
7036     {"getfsize",	1, 1, f_getfsize},
7037     {"getftime",	1, 1, f_getftime},
7038     {"getftype",	1, 1, f_getftype},
7039     {"getline",		1, 2, f_getline},
7040     {"getloclist",	1, 1, f_getqflist},
7041     {"getpos",		1, 1, f_getpos},
7042     {"getqflist",	0, 0, f_getqflist},
7043     {"getreg",		0, 2, f_getreg},
7044     {"getregtype",	0, 1, f_getregtype},
7045     {"gettabwinvar",	3, 3, f_gettabwinvar},
7046     {"getwinposx",	0, 0, f_getwinposx},
7047     {"getwinposy",	0, 0, f_getwinposy},
7048     {"getwinvar",	2, 2, f_getwinvar},
7049     {"glob",		1, 1, f_glob},
7050     {"globpath",	2, 2, f_globpath},
7051     {"has",		1, 1, f_has},
7052     {"has_key",		2, 2, f_has_key},
7053     {"hasmapto",	1, 3, f_hasmapto},
7054     {"highlightID",	1, 1, f_hlID},		/* obsolete */
7055     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
7056     {"histadd",		2, 2, f_histadd},
7057     {"histdel",		1, 2, f_histdel},
7058     {"histget",		1, 2, f_histget},
7059     {"histnr",		1, 1, f_histnr},
7060     {"hlID",		1, 1, f_hlID},
7061     {"hlexists",	1, 1, f_hlexists},
7062     {"hostname",	0, 0, f_hostname},
7063     {"iconv",		3, 3, f_iconv},
7064     {"indent",		1, 1, f_indent},
7065     {"index",		2, 4, f_index},
7066     {"input",		1, 3, f_input},
7067     {"inputdialog",	1, 3, f_inputdialog},
7068     {"inputlist",	1, 1, f_inputlist},
7069     {"inputrestore",	0, 0, f_inputrestore},
7070     {"inputsave",	0, 0, f_inputsave},
7071     {"inputsecret",	1, 2, f_inputsecret},
7072     {"insert",		2, 3, f_insert},
7073     {"isdirectory",	1, 1, f_isdirectory},
7074     {"islocked",	1, 1, f_islocked},
7075     {"items",		1, 1, f_items},
7076     {"join",		1, 2, f_join},
7077     {"keys",		1, 1, f_keys},
7078     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
7079     {"len",		1, 1, f_len},
7080     {"libcall",		3, 3, f_libcall},
7081     {"libcallnr",	3, 3, f_libcallnr},
7082     {"line",		1, 1, f_line},
7083     {"line2byte",	1, 1, f_line2byte},
7084     {"lispindent",	1, 1, f_lispindent},
7085     {"localtime",	0, 0, f_localtime},
7086     {"map",		2, 2, f_map},
7087     {"maparg",		1, 3, f_maparg},
7088     {"mapcheck",	1, 3, f_mapcheck},
7089     {"match",		2, 4, f_match},
7090     {"matcharg",	1, 1, f_matcharg},
7091     {"matchend",	2, 4, f_matchend},
7092     {"matchlist",	2, 4, f_matchlist},
7093     {"matchstr",	2, 4, f_matchstr},
7094     {"max",		1, 1, f_max},
7095     {"min",		1, 1, f_min},
7096 #ifdef vim_mkdir
7097     {"mkdir",		1, 3, f_mkdir},
7098 #endif
7099     {"mode",		0, 0, f_mode},
7100     {"nextnonblank",	1, 1, f_nextnonblank},
7101     {"nr2char",		1, 1, f_nr2char},
7102     {"pathshorten",	1, 1, f_pathshorten},
7103     {"prevnonblank",	1, 1, f_prevnonblank},
7104     {"printf",		2, 19, f_printf},
7105     {"pumvisible",	0, 0, f_pumvisible},
7106     {"range",		1, 3, f_range},
7107     {"readfile",	1, 3, f_readfile},
7108     {"reltime",		0, 2, f_reltime},
7109     {"reltimestr",	1, 1, f_reltimestr},
7110     {"remote_expr",	2, 3, f_remote_expr},
7111     {"remote_foreground", 1, 1, f_remote_foreground},
7112     {"remote_peek",	1, 2, f_remote_peek},
7113     {"remote_read",	1, 1, f_remote_read},
7114     {"remote_send",	2, 3, f_remote_send},
7115     {"remove",		2, 3, f_remove},
7116     {"rename",		2, 2, f_rename},
7117     {"repeat",		2, 2, f_repeat},
7118     {"resolve",		1, 1, f_resolve},
7119     {"reverse",		1, 1, f_reverse},
7120     {"search",		1, 3, f_search},
7121     {"searchdecl",	1, 3, f_searchdecl},
7122     {"searchpair",	3, 6, f_searchpair},
7123     {"searchpairpos",	3, 6, f_searchpairpos},
7124     {"searchpos",	1, 3, f_searchpos},
7125     {"server2client",	2, 2, f_server2client},
7126     {"serverlist",	0, 0, f_serverlist},
7127     {"setbufvar",	3, 3, f_setbufvar},
7128     {"setcmdpos",	1, 1, f_setcmdpos},
7129     {"setline",		2, 2, f_setline},
7130     {"setloclist",	2, 3, f_setloclist},
7131     {"setpos",		2, 2, f_setpos},
7132     {"setqflist",	1, 2, f_setqflist},
7133     {"setreg",		2, 3, f_setreg},
7134     {"settabwinvar",	4, 4, f_settabwinvar},
7135     {"setwinvar",	3, 3, f_setwinvar},
7136     {"simplify",	1, 1, f_simplify},
7137     {"sort",		1, 2, f_sort},
7138     {"soundfold",	1, 1, f_soundfold},
7139     {"spellbadword",	0, 1, f_spellbadword},
7140     {"spellsuggest",	1, 3, f_spellsuggest},
7141     {"split",		1, 3, f_split},
7142     {"str2nr",		1, 2, f_str2nr},
7143 #ifdef HAVE_STRFTIME
7144     {"strftime",	1, 2, f_strftime},
7145 #endif
7146     {"stridx",		2, 3, f_stridx},
7147     {"string",		1, 1, f_string},
7148     {"strlen",		1, 1, f_strlen},
7149     {"strpart",		2, 3, f_strpart},
7150     {"strridx",		2, 3, f_strridx},
7151     {"strtrans",	1, 1, f_strtrans},
7152     {"submatch",	1, 1, f_submatch},
7153     {"substitute",	4, 4, f_substitute},
7154     {"synID",		3, 3, f_synID},
7155     {"synIDattr",	2, 3, f_synIDattr},
7156     {"synIDtrans",	1, 1, f_synIDtrans},
7157     {"system",		1, 2, f_system},
7158     {"tabpagebuflist",	0, 1, f_tabpagebuflist},
7159     {"tabpagenr",	0, 1, f_tabpagenr},
7160     {"tabpagewinnr",	1, 2, f_tabpagewinnr},
7161     {"tagfiles",	0, 0, f_tagfiles},
7162     {"taglist",		1, 1, f_taglist},
7163     {"tempname",	0, 0, f_tempname},
7164     {"test",		1, 1, f_test},
7165     {"tolower",		1, 1, f_tolower},
7166     {"toupper",		1, 1, f_toupper},
7167     {"tr",		3, 3, f_tr},
7168     {"type",		1, 1, f_type},
7169     {"values",		1, 1, f_values},
7170     {"virtcol",		1, 1, f_virtcol},
7171     {"visualmode",	0, 1, f_visualmode},
7172     {"winbufnr",	1, 1, f_winbufnr},
7173     {"wincol",		0, 0, f_wincol},
7174     {"winheight",	1, 1, f_winheight},
7175     {"winline",		0, 0, f_winline},
7176     {"winnr",		0, 1, f_winnr},
7177     {"winrestcmd",	0, 0, f_winrestcmd},
7178     {"winrestview",	1, 1, f_winrestview},
7179     {"winsaveview",	0, 0, f_winsaveview},
7180     {"winwidth",	1, 1, f_winwidth},
7181     {"writefile",	2, 3, f_writefile},
7182 };
7183 
7184 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
7185 
7186 /*
7187  * Function given to ExpandGeneric() to obtain the list of internal
7188  * or user defined function names.
7189  */
7190     char_u *
7191 get_function_name(xp, idx)
7192     expand_T	*xp;
7193     int		idx;
7194 {
7195     static int	intidx = -1;
7196     char_u	*name;
7197 
7198     if (idx == 0)
7199 	intidx = -1;
7200     if (intidx < 0)
7201     {
7202 	name = get_user_func_name(xp, idx);
7203 	if (name != NULL)
7204 	    return name;
7205     }
7206     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
7207     {
7208 	STRCPY(IObuff, functions[intidx].f_name);
7209 	STRCAT(IObuff, "(");
7210 	if (functions[intidx].f_max_argc == 0)
7211 	    STRCAT(IObuff, ")");
7212 	return IObuff;
7213     }
7214 
7215     return NULL;
7216 }
7217 
7218 /*
7219  * Function given to ExpandGeneric() to obtain the list of internal or
7220  * user defined variable or function names.
7221  */
7222 /*ARGSUSED*/
7223     char_u *
7224 get_expr_name(xp, idx)
7225     expand_T	*xp;
7226     int		idx;
7227 {
7228     static int	intidx = -1;
7229     char_u	*name;
7230 
7231     if (idx == 0)
7232 	intidx = -1;
7233     if (intidx < 0)
7234     {
7235 	name = get_function_name(xp, idx);
7236 	if (name != NULL)
7237 	    return name;
7238     }
7239     return get_user_var_name(xp, ++intidx);
7240 }
7241 
7242 #endif /* FEAT_CMDL_COMPL */
7243 
7244 /*
7245  * Find internal function in table above.
7246  * Return index, or -1 if not found
7247  */
7248     static int
7249 find_internal_func(name)
7250     char_u	*name;		/* name of the function */
7251 {
7252     int		first = 0;
7253     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
7254     int		cmp;
7255     int		x;
7256 
7257     /*
7258      * Find the function name in the table. Binary search.
7259      */
7260     while (first <= last)
7261     {
7262 	x = first + ((unsigned)(last - first) >> 1);
7263 	cmp = STRCMP(name, functions[x].f_name);
7264 	if (cmp < 0)
7265 	    last = x - 1;
7266 	else if (cmp > 0)
7267 	    first = x + 1;
7268 	else
7269 	    return x;
7270     }
7271     return -1;
7272 }
7273 
7274 /*
7275  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
7276  * name it contains, otherwise return "name".
7277  */
7278     static char_u *
7279 deref_func_name(name, lenp)
7280     char_u	*name;
7281     int		*lenp;
7282 {
7283     dictitem_T	*v;
7284     int		cc;
7285 
7286     cc = name[*lenp];
7287     name[*lenp] = NUL;
7288     v = find_var(name, NULL);
7289     name[*lenp] = cc;
7290     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
7291     {
7292 	if (v->di_tv.vval.v_string == NULL)
7293 	{
7294 	    *lenp = 0;
7295 	    return (char_u *)"";	/* just in case */
7296 	}
7297 	*lenp = (int)STRLEN(v->di_tv.vval.v_string);
7298 	return v->di_tv.vval.v_string;
7299     }
7300 
7301     return name;
7302 }
7303 
7304 /*
7305  * Allocate a variable for the result of a function.
7306  * Return OK or FAIL.
7307  */
7308     static int
7309 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
7310 							   evaluate, selfdict)
7311     char_u	*name;		/* name of the function */
7312     int		len;		/* length of "name" */
7313     typval_T	*rettv;
7314     char_u	**arg;		/* argument, pointing to the '(' */
7315     linenr_T	firstline;	/* first line of range */
7316     linenr_T	lastline;	/* last line of range */
7317     int		*doesrange;	/* return: function handled range */
7318     int		evaluate;
7319     dict_T	*selfdict;	/* Dictionary for "self" */
7320 {
7321     char_u	*argp;
7322     int		ret = OK;
7323     typval_T	argvars[MAX_FUNC_ARGS + 1];	/* vars for arguments */
7324     int		argcount = 0;		/* number of arguments found */
7325 
7326     /*
7327      * Get the arguments.
7328      */
7329     argp = *arg;
7330     while (argcount < MAX_FUNC_ARGS)
7331     {
7332 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7333 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7334 	    break;
7335 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7336 	{
7337 	    ret = FAIL;
7338 	    break;
7339 	}
7340 	++argcount;
7341 	if (*argp != ',')
7342 	    break;
7343     }
7344     if (*argp == ')')
7345 	++argp;
7346     else
7347 	ret = FAIL;
7348 
7349     if (ret == OK)
7350 	ret = call_func(name, len, rettv, argcount, argvars,
7351 			  firstline, lastline, doesrange, evaluate, selfdict);
7352     else if (!aborting())
7353     {
7354 	if (argcount == MAX_FUNC_ARGS)
7355 	    emsg_funcname("E740: Too many arguments for function %s", name);
7356 	else
7357 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7358     }
7359 
7360     while (--argcount >= 0)
7361 	clear_tv(&argvars[argcount]);
7362 
7363     *arg = skipwhite(argp);
7364     return ret;
7365 }
7366 
7367 
7368 /*
7369  * Call a function with its resolved parameters
7370  * Return OK when the function can't be called,  FAIL otherwise.
7371  * Also returns OK when an error was encountered while executing the function.
7372  */
7373     static int
7374 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7375 						doesrange, evaluate, selfdict)
7376     char_u	*name;		/* name of the function */
7377     int		len;		/* length of "name" */
7378     typval_T	*rettv;		/* return value goes here */
7379     int		argcount;	/* number of "argvars" */
7380     typval_T	*argvars;	/* vars for arguments, must have "argcount"
7381 				   PLUS ONE elements! */
7382     linenr_T	firstline;	/* first line of range */
7383     linenr_T	lastline;	/* last line of range */
7384     int		*doesrange;	/* return: function handled range */
7385     int		evaluate;
7386     dict_T	*selfdict;	/* Dictionary for "self" */
7387 {
7388     int		ret = FAIL;
7389 #define ERROR_UNKNOWN	0
7390 #define ERROR_TOOMANY	1
7391 #define ERROR_TOOFEW	2
7392 #define ERROR_SCRIPT	3
7393 #define ERROR_DICT	4
7394 #define ERROR_NONE	5
7395 #define ERROR_OTHER	6
7396     int		error = ERROR_NONE;
7397     int		i;
7398     int		llen;
7399     ufunc_T	*fp;
7400     int		cc;
7401 #define FLEN_FIXED 40
7402     char_u	fname_buf[FLEN_FIXED + 1];
7403     char_u	*fname;
7404 
7405     /*
7406      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7407      * Change <SNR>123_name() to K_SNR 123_name().
7408      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7409      */
7410     cc = name[len];
7411     name[len] = NUL;
7412     llen = eval_fname_script(name);
7413     if (llen > 0)
7414     {
7415 	fname_buf[0] = K_SPECIAL;
7416 	fname_buf[1] = KS_EXTRA;
7417 	fname_buf[2] = (int)KE_SNR;
7418 	i = 3;
7419 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7420 	{
7421 	    if (current_SID <= 0)
7422 		error = ERROR_SCRIPT;
7423 	    else
7424 	    {
7425 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7426 		i = (int)STRLEN(fname_buf);
7427 	    }
7428 	}
7429 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7430 	{
7431 	    STRCPY(fname_buf + i, name + llen);
7432 	    fname = fname_buf;
7433 	}
7434 	else
7435 	{
7436 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7437 	    if (fname == NULL)
7438 		error = ERROR_OTHER;
7439 	    else
7440 	    {
7441 		mch_memmove(fname, fname_buf, (size_t)i);
7442 		STRCPY(fname + i, name + llen);
7443 	    }
7444 	}
7445     }
7446     else
7447 	fname = name;
7448 
7449     *doesrange = FALSE;
7450 
7451 
7452     /* execute the function if no errors detected and executing */
7453     if (evaluate && error == ERROR_NONE)
7454     {
7455 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7456 	error = ERROR_UNKNOWN;
7457 
7458 	if (!builtin_function(fname))
7459 	{
7460 	    /*
7461 	     * User defined function.
7462 	     */
7463 	    fp = find_func(fname);
7464 
7465 #ifdef FEAT_AUTOCMD
7466 	    /* Trigger FuncUndefined event, may load the function. */
7467 	    if (fp == NULL
7468 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7469 						     fname, fname, TRUE, NULL)
7470 		    && !aborting())
7471 	    {
7472 		/* executed an autocommand, search for the function again */
7473 		fp = find_func(fname);
7474 	    }
7475 #endif
7476 	    /* Try loading a package. */
7477 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7478 	    {
7479 		/* loaded a package, search for the function again */
7480 		fp = find_func(fname);
7481 	    }
7482 
7483 	    if (fp != NULL)
7484 	    {
7485 		if (fp->uf_flags & FC_RANGE)
7486 		    *doesrange = TRUE;
7487 		if (argcount < fp->uf_args.ga_len)
7488 		    error = ERROR_TOOFEW;
7489 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7490 		    error = ERROR_TOOMANY;
7491 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7492 		    error = ERROR_DICT;
7493 		else
7494 		{
7495 		    /*
7496 		     * Call the user function.
7497 		     * Save and restore search patterns, script variables and
7498 		     * redo buffer.
7499 		     */
7500 		    save_search_patterns();
7501 		    saveRedobuff();
7502 		    ++fp->uf_calls;
7503 		    call_user_func(fp, argcount, argvars, rettv,
7504 					       firstline, lastline,
7505 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7506 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7507 						      && fp->uf_refcount <= 0)
7508 			/* Function was unreferenced while being used, free it
7509 			 * now. */
7510 			func_free(fp);
7511 		    restoreRedobuff();
7512 		    restore_search_patterns();
7513 		    error = ERROR_NONE;
7514 		}
7515 	    }
7516 	}
7517 	else
7518 	{
7519 	    /*
7520 	     * Find the function name in the table, call its implementation.
7521 	     */
7522 	    i = find_internal_func(fname);
7523 	    if (i >= 0)
7524 	    {
7525 		if (argcount < functions[i].f_min_argc)
7526 		    error = ERROR_TOOFEW;
7527 		else if (argcount > functions[i].f_max_argc)
7528 		    error = ERROR_TOOMANY;
7529 		else
7530 		{
7531 		    argvars[argcount].v_type = VAR_UNKNOWN;
7532 		    functions[i].f_func(argvars, rettv);
7533 		    error = ERROR_NONE;
7534 		}
7535 	    }
7536 	}
7537 	/*
7538 	 * The function call (or "FuncUndefined" autocommand sequence) might
7539 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7540 	 * exception that has not been caught so far.  This situation can be
7541 	 * tested for by calling aborting().  For an error in an internal
7542 	 * function or for the "E132" error in call_user_func(), however, the
7543 	 * throw point at which the "force_abort" flag (temporarily reset by
7544 	 * emsg()) is normally updated has not been reached yet. We need to
7545 	 * update that flag first to make aborting() reliable.
7546 	 */
7547 	update_force_abort();
7548     }
7549     if (error == ERROR_NONE)
7550 	ret = OK;
7551 
7552     /*
7553      * Report an error unless the argument evaluation or function call has been
7554      * cancelled due to an aborting error, an interrupt, or an exception.
7555      */
7556     if (!aborting())
7557     {
7558 	switch (error)
7559 	{
7560 	    case ERROR_UNKNOWN:
7561 		    emsg_funcname(N_("E117: Unknown function: %s"), name);
7562 		    break;
7563 	    case ERROR_TOOMANY:
7564 		    emsg_funcname(e_toomanyarg, name);
7565 		    break;
7566 	    case ERROR_TOOFEW:
7567 		    emsg_funcname(N_("E119: Not enough arguments for function: %s"),
7568 									name);
7569 		    break;
7570 	    case ERROR_SCRIPT:
7571 		    emsg_funcname(N_("E120: Using <SID> not in a script context: %s"),
7572 									name);
7573 		    break;
7574 	    case ERROR_DICT:
7575 		    emsg_funcname(N_("E725: Calling dict function without Dictionary: %s"),
7576 									name);
7577 		    break;
7578 	}
7579     }
7580 
7581     name[len] = cc;
7582     if (fname != name && fname != fname_buf)
7583 	vim_free(fname);
7584 
7585     return ret;
7586 }
7587 
7588 /*
7589  * Give an error message with a function name.  Handle <SNR> things.
7590  */
7591     static void
7592 emsg_funcname(msg, name)
7593     char	*msg;
7594     char_u	*name;
7595 {
7596     char_u	*p;
7597 
7598     if (*name == K_SPECIAL)
7599 	p = concat_str((char_u *)"<SNR>", name + 3);
7600     else
7601 	p = name;
7602     EMSG2(_(msg), p);
7603     if (p != name)
7604 	vim_free(p);
7605 }
7606 
7607 /*********************************************
7608  * Implementation of the built-in functions
7609  */
7610 
7611 /*
7612  * "add(list, item)" function
7613  */
7614     static void
7615 f_add(argvars, rettv)
7616     typval_T	*argvars;
7617     typval_T	*rettv;
7618 {
7619     list_T	*l;
7620 
7621     rettv->vval.v_number = 1; /* Default: Failed */
7622     if (argvars[0].v_type == VAR_LIST)
7623     {
7624 	if ((l = argvars[0].vval.v_list) != NULL
7625 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7626 		&& list_append_tv(l, &argvars[1]) == OK)
7627 	    copy_tv(&argvars[0], rettv);
7628     }
7629     else
7630 	EMSG(_(e_listreq));
7631 }
7632 
7633 /*
7634  * "append(lnum, string/list)" function
7635  */
7636     static void
7637 f_append(argvars, rettv)
7638     typval_T	*argvars;
7639     typval_T	*rettv;
7640 {
7641     long	lnum;
7642     char_u	*line;
7643     list_T	*l = NULL;
7644     listitem_T	*li = NULL;
7645     typval_T	*tv;
7646     long	added = 0;
7647 
7648     lnum = get_tv_lnum(argvars);
7649     if (lnum >= 0
7650 	    && lnum <= curbuf->b_ml.ml_line_count
7651 	    && u_save(lnum, lnum + 1) == OK)
7652     {
7653 	if (argvars[1].v_type == VAR_LIST)
7654 	{
7655 	    l = argvars[1].vval.v_list;
7656 	    if (l == NULL)
7657 		return;
7658 	    li = l->lv_first;
7659 	}
7660 	rettv->vval.v_number = 0;	/* Default: Success */
7661 	for (;;)
7662 	{
7663 	    if (l == NULL)
7664 		tv = &argvars[1];	/* append a string */
7665 	    else if (li == NULL)
7666 		break;			/* end of list */
7667 	    else
7668 		tv = &li->li_tv;	/* append item from list */
7669 	    line = get_tv_string_chk(tv);
7670 	    if (line == NULL)		/* type error */
7671 	    {
7672 		rettv->vval.v_number = 1;	/* Failed */
7673 		break;
7674 	    }
7675 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7676 	    ++added;
7677 	    if (l == NULL)
7678 		break;
7679 	    li = li->li_next;
7680 	}
7681 
7682 	appended_lines_mark(lnum, added);
7683 	if (curwin->w_cursor.lnum > lnum)
7684 	    curwin->w_cursor.lnum += added;
7685     }
7686     else
7687 	rettv->vval.v_number = 1;	/* Failed */
7688 }
7689 
7690 /*
7691  * "argc()" function
7692  */
7693 /* ARGSUSED */
7694     static void
7695 f_argc(argvars, rettv)
7696     typval_T	*argvars;
7697     typval_T	*rettv;
7698 {
7699     rettv->vval.v_number = ARGCOUNT;
7700 }
7701 
7702 /*
7703  * "argidx()" function
7704  */
7705 /* ARGSUSED */
7706     static void
7707 f_argidx(argvars, rettv)
7708     typval_T	*argvars;
7709     typval_T	*rettv;
7710 {
7711     rettv->vval.v_number = curwin->w_arg_idx;
7712 }
7713 
7714 /*
7715  * "argv(nr)" function
7716  */
7717     static void
7718 f_argv(argvars, rettv)
7719     typval_T	*argvars;
7720     typval_T	*rettv;
7721 {
7722     int		idx;
7723 
7724     if (argvars[0].v_type != VAR_UNKNOWN)
7725     {
7726 	idx = get_tv_number_chk(&argvars[0], NULL);
7727 	if (idx >= 0 && idx < ARGCOUNT)
7728 	    rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7729 	else
7730 	    rettv->vval.v_string = NULL;
7731 	rettv->v_type = VAR_STRING;
7732     }
7733     else if (rettv_list_alloc(rettv) == OK)
7734 	for (idx = 0; idx < ARGCOUNT; ++idx)
7735 	    list_append_string(rettv->vval.v_list,
7736 					       alist_name(&ARGLIST[idx]), -1);
7737 }
7738 
7739 /*
7740  * "browse(save, title, initdir, default)" function
7741  */
7742 /* ARGSUSED */
7743     static void
7744 f_browse(argvars, rettv)
7745     typval_T	*argvars;
7746     typval_T	*rettv;
7747 {
7748 #ifdef FEAT_BROWSE
7749     int		save;
7750     char_u	*title;
7751     char_u	*initdir;
7752     char_u	*defname;
7753     char_u	buf[NUMBUFLEN];
7754     char_u	buf2[NUMBUFLEN];
7755     int		error = FALSE;
7756 
7757     save = get_tv_number_chk(&argvars[0], &error);
7758     title = get_tv_string_chk(&argvars[1]);
7759     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7760     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7761 
7762     if (error || title == NULL || initdir == NULL || defname == NULL)
7763 	rettv->vval.v_string = NULL;
7764     else
7765 	rettv->vval.v_string =
7766 		 do_browse(save ? BROWSE_SAVE : 0,
7767 				 title, defname, NULL, initdir, NULL, curbuf);
7768 #else
7769     rettv->vval.v_string = NULL;
7770 #endif
7771     rettv->v_type = VAR_STRING;
7772 }
7773 
7774 /*
7775  * "browsedir(title, initdir)" function
7776  */
7777 /* ARGSUSED */
7778     static void
7779 f_browsedir(argvars, rettv)
7780     typval_T	*argvars;
7781     typval_T	*rettv;
7782 {
7783 #ifdef FEAT_BROWSE
7784     char_u	*title;
7785     char_u	*initdir;
7786     char_u	buf[NUMBUFLEN];
7787 
7788     title = get_tv_string_chk(&argvars[0]);
7789     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7790 
7791     if (title == NULL || initdir == NULL)
7792 	rettv->vval.v_string = NULL;
7793     else
7794 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7795 				    title, NULL, NULL, initdir, NULL, curbuf);
7796 #else
7797     rettv->vval.v_string = NULL;
7798 #endif
7799     rettv->v_type = VAR_STRING;
7800 }
7801 
7802 static buf_T *find_buffer __ARGS((typval_T *avar));
7803 
7804 /*
7805  * Find a buffer by number or exact name.
7806  */
7807     static buf_T *
7808 find_buffer(avar)
7809     typval_T	*avar;
7810 {
7811     buf_T	*buf = NULL;
7812 
7813     if (avar->v_type == VAR_NUMBER)
7814 	buf = buflist_findnr((int)avar->vval.v_number);
7815     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7816     {
7817 	buf = buflist_findname_exp(avar->vval.v_string);
7818 	if (buf == NULL)
7819 	{
7820 	    /* No full path name match, try a match with a URL or a "nofile"
7821 	     * buffer, these don't use the full path. */
7822 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7823 		if (buf->b_fname != NULL
7824 			&& (path_with_url(buf->b_fname)
7825 #ifdef FEAT_QUICKFIX
7826 			    || bt_nofile(buf)
7827 #endif
7828 			   )
7829 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7830 		    break;
7831 	}
7832     }
7833     return buf;
7834 }
7835 
7836 /*
7837  * "bufexists(expr)" function
7838  */
7839     static void
7840 f_bufexists(argvars, rettv)
7841     typval_T	*argvars;
7842     typval_T	*rettv;
7843 {
7844     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7845 }
7846 
7847 /*
7848  * "buflisted(expr)" function
7849  */
7850     static void
7851 f_buflisted(argvars, rettv)
7852     typval_T	*argvars;
7853     typval_T	*rettv;
7854 {
7855     buf_T	*buf;
7856 
7857     buf = find_buffer(&argvars[0]);
7858     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7859 }
7860 
7861 /*
7862  * "bufloaded(expr)" function
7863  */
7864     static void
7865 f_bufloaded(argvars, rettv)
7866     typval_T	*argvars;
7867     typval_T	*rettv;
7868 {
7869     buf_T	*buf;
7870 
7871     buf = find_buffer(&argvars[0]);
7872     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7873 }
7874 
7875 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7876 
7877 /*
7878  * Get buffer by number or pattern.
7879  */
7880     static buf_T *
7881 get_buf_tv(tv)
7882     typval_T	*tv;
7883 {
7884     char_u	*name = tv->vval.v_string;
7885     int		save_magic;
7886     char_u	*save_cpo;
7887     buf_T	*buf;
7888 
7889     if (tv->v_type == VAR_NUMBER)
7890 	return buflist_findnr((int)tv->vval.v_number);
7891     if (tv->v_type != VAR_STRING)
7892 	return NULL;
7893     if (name == NULL || *name == NUL)
7894 	return curbuf;
7895     if (name[0] == '$' && name[1] == NUL)
7896 	return lastbuf;
7897 
7898     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7899     save_magic = p_magic;
7900     p_magic = TRUE;
7901     save_cpo = p_cpo;
7902     p_cpo = (char_u *)"";
7903 
7904     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7905 								TRUE, FALSE));
7906 
7907     p_magic = save_magic;
7908     p_cpo = save_cpo;
7909 
7910     /* If not found, try expanding the name, like done for bufexists(). */
7911     if (buf == NULL)
7912 	buf = find_buffer(tv);
7913 
7914     return buf;
7915 }
7916 
7917 /*
7918  * "bufname(expr)" function
7919  */
7920     static void
7921 f_bufname(argvars, rettv)
7922     typval_T	*argvars;
7923     typval_T	*rettv;
7924 {
7925     buf_T	*buf;
7926 
7927     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7928     ++emsg_off;
7929     buf = get_buf_tv(&argvars[0]);
7930     rettv->v_type = VAR_STRING;
7931     if (buf != NULL && buf->b_fname != NULL)
7932 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7933     else
7934 	rettv->vval.v_string = NULL;
7935     --emsg_off;
7936 }
7937 
7938 /*
7939  * "bufnr(expr)" function
7940  */
7941     static void
7942 f_bufnr(argvars, rettv)
7943     typval_T	*argvars;
7944     typval_T	*rettv;
7945 {
7946     buf_T	*buf;
7947     int		error = FALSE;
7948     char_u	*name;
7949 
7950     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7951     ++emsg_off;
7952     buf = get_buf_tv(&argvars[0]);
7953     --emsg_off;
7954 
7955     /* If the buffer isn't found and the second argument is not zero create a
7956      * new buffer. */
7957     if (buf == NULL
7958 	    && argvars[1].v_type != VAR_UNKNOWN
7959 	    && get_tv_number_chk(&argvars[1], &error) != 0
7960 	    && !error
7961 	    && (name = get_tv_string_chk(&argvars[0])) != NULL
7962 	    && !error)
7963 	buf = buflist_new(name, NULL, (linenr_T)1, 0);
7964 
7965     if (buf != NULL)
7966 	rettv->vval.v_number = buf->b_fnum;
7967     else
7968 	rettv->vval.v_number = -1;
7969 }
7970 
7971 /*
7972  * "bufwinnr(nr)" function
7973  */
7974     static void
7975 f_bufwinnr(argvars, rettv)
7976     typval_T	*argvars;
7977     typval_T	*rettv;
7978 {
7979 #ifdef FEAT_WINDOWS
7980     win_T	*wp;
7981     int		winnr = 0;
7982 #endif
7983     buf_T	*buf;
7984 
7985     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7986     ++emsg_off;
7987     buf = get_buf_tv(&argvars[0]);
7988 #ifdef FEAT_WINDOWS
7989     for (wp = firstwin; wp; wp = wp->w_next)
7990     {
7991 	++winnr;
7992 	if (wp->w_buffer == buf)
7993 	    break;
7994     }
7995     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7996 #else
7997     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7998 #endif
7999     --emsg_off;
8000 }
8001 
8002 /*
8003  * "byte2line(byte)" function
8004  */
8005 /*ARGSUSED*/
8006     static void
8007 f_byte2line(argvars, rettv)
8008     typval_T	*argvars;
8009     typval_T	*rettv;
8010 {
8011 #ifndef FEAT_BYTEOFF
8012     rettv->vval.v_number = -1;
8013 #else
8014     long	boff = 0;
8015 
8016     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
8017     if (boff < 0)
8018 	rettv->vval.v_number = -1;
8019     else
8020 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
8021 							  (linenr_T)0, &boff);
8022 #endif
8023 }
8024 
8025 /*
8026  * "byteidx()" function
8027  */
8028 /*ARGSUSED*/
8029     static void
8030 f_byteidx(argvars, rettv)
8031     typval_T	*argvars;
8032     typval_T	*rettv;
8033 {
8034 #ifdef FEAT_MBYTE
8035     char_u	*t;
8036 #endif
8037     char_u	*str;
8038     long	idx;
8039 
8040     str = get_tv_string_chk(&argvars[0]);
8041     idx = get_tv_number_chk(&argvars[1], NULL);
8042     rettv->vval.v_number = -1;
8043     if (str == NULL || idx < 0)
8044 	return;
8045 
8046 #ifdef FEAT_MBYTE
8047     t = str;
8048     for ( ; idx > 0; idx--)
8049     {
8050 	if (*t == NUL)		/* EOL reached */
8051 	    return;
8052 	t += (*mb_ptr2len)(t);
8053     }
8054     rettv->vval.v_number = (varnumber_T)(t - str);
8055 #else
8056     if (idx <= STRLEN(str))
8057 	rettv->vval.v_number = idx;
8058 #endif
8059 }
8060 
8061 /*
8062  * "call(func, arglist)" function
8063  */
8064     static void
8065 f_call(argvars, rettv)
8066     typval_T	*argvars;
8067     typval_T	*rettv;
8068 {
8069     char_u	*func;
8070     typval_T	argv[MAX_FUNC_ARGS + 1];
8071     int		argc = 0;
8072     listitem_T	*item;
8073     int		dummy;
8074     dict_T	*selfdict = NULL;
8075 
8076     rettv->vval.v_number = 0;
8077     if (argvars[1].v_type != VAR_LIST)
8078     {
8079 	EMSG(_(e_listreq));
8080 	return;
8081     }
8082     if (argvars[1].vval.v_list == NULL)
8083 	return;
8084 
8085     if (argvars[0].v_type == VAR_FUNC)
8086 	func = argvars[0].vval.v_string;
8087     else
8088 	func = get_tv_string(&argvars[0]);
8089     if (*func == NUL)
8090 	return;		/* type error or empty name */
8091 
8092     if (argvars[2].v_type != VAR_UNKNOWN)
8093     {
8094 	if (argvars[2].v_type != VAR_DICT)
8095 	{
8096 	    EMSG(_(e_dictreq));
8097 	    return;
8098 	}
8099 	selfdict = argvars[2].vval.v_dict;
8100     }
8101 
8102     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
8103 							 item = item->li_next)
8104     {
8105 	if (argc == MAX_FUNC_ARGS)
8106 	{
8107 	    EMSG(_("E699: Too many arguments"));
8108 	    break;
8109 	}
8110 	/* Make a copy of each argument.  This is needed to be able to set
8111 	 * v_lock to VAR_FIXED in the copy without changing the original list.
8112 	 */
8113 	copy_tv(&item->li_tv, &argv[argc++]);
8114     }
8115 
8116     if (item == NULL)
8117 	(void)call_func(func, (int)STRLEN(func), rettv, argc, argv,
8118 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
8119 						      &dummy, TRUE, selfdict);
8120 
8121     /* Free the arguments. */
8122     while (argc > 0)
8123 	clear_tv(&argv[--argc]);
8124 }
8125 
8126 /*
8127  * "changenr()" function
8128  */
8129 /*ARGSUSED*/
8130     static void
8131 f_changenr(argvars, rettv)
8132     typval_T	*argvars;
8133     typval_T	*rettv;
8134 {
8135     rettv->vval.v_number = curbuf->b_u_seq_cur;
8136 }
8137 
8138 /*
8139  * "char2nr(string)" function
8140  */
8141     static void
8142 f_char2nr(argvars, rettv)
8143     typval_T	*argvars;
8144     typval_T	*rettv;
8145 {
8146 #ifdef FEAT_MBYTE
8147     if (has_mbyte)
8148 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
8149     else
8150 #endif
8151     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
8152 }
8153 
8154 /*
8155  * "cindent(lnum)" function
8156  */
8157     static void
8158 f_cindent(argvars, rettv)
8159     typval_T	*argvars;
8160     typval_T	*rettv;
8161 {
8162 #ifdef FEAT_CINDENT
8163     pos_T	pos;
8164     linenr_T	lnum;
8165 
8166     pos = curwin->w_cursor;
8167     lnum = get_tv_lnum(argvars);
8168     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8169     {
8170 	curwin->w_cursor.lnum = lnum;
8171 	rettv->vval.v_number = get_c_indent();
8172 	curwin->w_cursor = pos;
8173     }
8174     else
8175 #endif
8176 	rettv->vval.v_number = -1;
8177 }
8178 
8179 /*
8180  * "col(string)" function
8181  */
8182     static void
8183 f_col(argvars, rettv)
8184     typval_T	*argvars;
8185     typval_T	*rettv;
8186 {
8187     colnr_T	col = 0;
8188     pos_T	*fp;
8189     int		fnum = curbuf->b_fnum;
8190 
8191     fp = var2fpos(&argvars[0], FALSE, &fnum);
8192     if (fp != NULL && fnum == curbuf->b_fnum)
8193     {
8194 	if (fp->col == MAXCOL)
8195 	{
8196 	    /* '> can be MAXCOL, get the length of the line then */
8197 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
8198 		col = (colnr_T)STRLEN(ml_get(fp->lnum)) + 1;
8199 	    else
8200 		col = MAXCOL;
8201 	}
8202 	else
8203 	{
8204 	    col = fp->col + 1;
8205 #ifdef FEAT_VIRTUALEDIT
8206 	    /* col(".") when the cursor is on the NUL at the end of the line
8207 	     * because of "coladd" can be seen as an extra column. */
8208 	    if (virtual_active() && fp == &curwin->w_cursor)
8209 	    {
8210 		char_u	*p = ml_get_cursor();
8211 
8212 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
8213 				 curwin->w_virtcol - curwin->w_cursor.coladd))
8214 		{
8215 # ifdef FEAT_MBYTE
8216 		    int		l;
8217 
8218 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
8219 			col += l;
8220 # else
8221 		    if (*p != NUL && p[1] == NUL)
8222 			++col;
8223 # endif
8224 		}
8225 	    }
8226 #endif
8227 	}
8228     }
8229     rettv->vval.v_number = col;
8230 }
8231 
8232 #if defined(FEAT_INS_EXPAND)
8233 /*
8234  * "complete()" function
8235  */
8236 /*ARGSUSED*/
8237     static void
8238 f_complete(argvars, rettv)
8239     typval_T	*argvars;
8240     typval_T	*rettv;
8241 {
8242     int	    startcol;
8243 
8244     if ((State & INSERT) == 0)
8245     {
8246 	EMSG(_("E785: complete() can only be used in Insert mode"));
8247 	return;
8248     }
8249     if (argvars[1].v_type != VAR_LIST || argvars[1].vval.v_list == NULL)
8250     {
8251 	EMSG(_(e_invarg));
8252 	return;
8253     }
8254 
8255     startcol = get_tv_number_chk(&argvars[0], NULL);
8256     if (startcol <= 0)
8257 	return;
8258 
8259     set_completion(startcol - 1, argvars[1].vval.v_list);
8260 }
8261 
8262 /*
8263  * "complete_add()" function
8264  */
8265 /*ARGSUSED*/
8266     static void
8267 f_complete_add(argvars, rettv)
8268     typval_T	*argvars;
8269     typval_T	*rettv;
8270 {
8271     rettv->vval.v_number = ins_compl_add_tv(&argvars[0], 0);
8272 }
8273 
8274 /*
8275  * "complete_check()" function
8276  */
8277 /*ARGSUSED*/
8278     static void
8279 f_complete_check(argvars, rettv)
8280     typval_T	*argvars;
8281     typval_T	*rettv;
8282 {
8283     int		saved = RedrawingDisabled;
8284 
8285     RedrawingDisabled = 0;
8286     ins_compl_check_keys(0);
8287     rettv->vval.v_number = compl_interrupted;
8288     RedrawingDisabled = saved;
8289 }
8290 #endif
8291 
8292 /*
8293  * "confirm(message, buttons[, default [, type]])" function
8294  */
8295 /*ARGSUSED*/
8296     static void
8297 f_confirm(argvars, rettv)
8298     typval_T	*argvars;
8299     typval_T	*rettv;
8300 {
8301 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
8302     char_u	*message;
8303     char_u	*buttons = NULL;
8304     char_u	buf[NUMBUFLEN];
8305     char_u	buf2[NUMBUFLEN];
8306     int		def = 1;
8307     int		type = VIM_GENERIC;
8308     char_u	*typestr;
8309     int		error = FALSE;
8310 
8311     message = get_tv_string_chk(&argvars[0]);
8312     if (message == NULL)
8313 	error = TRUE;
8314     if (argvars[1].v_type != VAR_UNKNOWN)
8315     {
8316 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
8317 	if (buttons == NULL)
8318 	    error = TRUE;
8319 	if (argvars[2].v_type != VAR_UNKNOWN)
8320 	{
8321 	    def = get_tv_number_chk(&argvars[2], &error);
8322 	    if (argvars[3].v_type != VAR_UNKNOWN)
8323 	    {
8324 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
8325 		if (typestr == NULL)
8326 		    error = TRUE;
8327 		else
8328 		{
8329 		    switch (TOUPPER_ASC(*typestr))
8330 		    {
8331 			case 'E': type = VIM_ERROR; break;
8332 			case 'Q': type = VIM_QUESTION; break;
8333 			case 'I': type = VIM_INFO; break;
8334 			case 'W': type = VIM_WARNING; break;
8335 			case 'G': type = VIM_GENERIC; break;
8336 		    }
8337 		}
8338 	    }
8339 	}
8340     }
8341 
8342     if (buttons == NULL || *buttons == NUL)
8343 	buttons = (char_u *)_("&Ok");
8344 
8345     if (error)
8346 	rettv->vval.v_number = 0;
8347     else
8348 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
8349 								   def, NULL);
8350 #else
8351     rettv->vval.v_number = 0;
8352 #endif
8353 }
8354 
8355 /*
8356  * "copy()" function
8357  */
8358     static void
8359 f_copy(argvars, rettv)
8360     typval_T	*argvars;
8361     typval_T	*rettv;
8362 {
8363     item_copy(&argvars[0], rettv, FALSE, 0);
8364 }
8365 
8366 /*
8367  * "count()" function
8368  */
8369     static void
8370 f_count(argvars, rettv)
8371     typval_T	*argvars;
8372     typval_T	*rettv;
8373 {
8374     long	n = 0;
8375     int		ic = FALSE;
8376 
8377     if (argvars[0].v_type == VAR_LIST)
8378     {
8379 	listitem_T	*li;
8380 	list_T		*l;
8381 	long		idx;
8382 
8383 	if ((l = argvars[0].vval.v_list) != NULL)
8384 	{
8385 	    li = l->lv_first;
8386 	    if (argvars[2].v_type != VAR_UNKNOWN)
8387 	    {
8388 		int error = FALSE;
8389 
8390 		ic = get_tv_number_chk(&argvars[2], &error);
8391 		if (argvars[3].v_type != VAR_UNKNOWN)
8392 		{
8393 		    idx = get_tv_number_chk(&argvars[3], &error);
8394 		    if (!error)
8395 		    {
8396 			li = list_find(l, idx);
8397 			if (li == NULL)
8398 			    EMSGN(_(e_listidx), idx);
8399 		    }
8400 		}
8401 		if (error)
8402 		    li = NULL;
8403 	    }
8404 
8405 	    for ( ; li != NULL; li = li->li_next)
8406 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8407 		    ++n;
8408 	}
8409     }
8410     else if (argvars[0].v_type == VAR_DICT)
8411     {
8412 	int		todo;
8413 	dict_T		*d;
8414 	hashitem_T	*hi;
8415 
8416 	if ((d = argvars[0].vval.v_dict) != NULL)
8417 	{
8418 	    int error = FALSE;
8419 
8420 	    if (argvars[2].v_type != VAR_UNKNOWN)
8421 	    {
8422 		ic = get_tv_number_chk(&argvars[2], &error);
8423 		if (argvars[3].v_type != VAR_UNKNOWN)
8424 		    EMSG(_(e_invarg));
8425 	    }
8426 
8427 	    todo = error ? 0 : (int)d->dv_hashtab.ht_used;
8428 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8429 	    {
8430 		if (!HASHITEM_EMPTY(hi))
8431 		{
8432 		    --todo;
8433 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8434 			++n;
8435 		}
8436 	    }
8437 	}
8438     }
8439     else
8440 	EMSG2(_(e_listdictarg), "count()");
8441     rettv->vval.v_number = n;
8442 }
8443 
8444 /*
8445  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8446  *
8447  * Checks the existence of a cscope connection.
8448  */
8449 /*ARGSUSED*/
8450     static void
8451 f_cscope_connection(argvars, rettv)
8452     typval_T	*argvars;
8453     typval_T	*rettv;
8454 {
8455 #ifdef FEAT_CSCOPE
8456     int		num = 0;
8457     char_u	*dbpath = NULL;
8458     char_u	*prepend = NULL;
8459     char_u	buf[NUMBUFLEN];
8460 
8461     if (argvars[0].v_type != VAR_UNKNOWN
8462 	    && argvars[1].v_type != VAR_UNKNOWN)
8463     {
8464 	num = (int)get_tv_number(&argvars[0]);
8465 	dbpath = get_tv_string(&argvars[1]);
8466 	if (argvars[2].v_type != VAR_UNKNOWN)
8467 	    prepend = get_tv_string_buf(&argvars[2], buf);
8468     }
8469 
8470     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8471 #else
8472     rettv->vval.v_number = 0;
8473 #endif
8474 }
8475 
8476 /*
8477  * "cursor(lnum, col)" function
8478  *
8479  * Moves the cursor to the specified line and column
8480  */
8481 /*ARGSUSED*/
8482     static void
8483 f_cursor(argvars, rettv)
8484     typval_T	*argvars;
8485     typval_T	*rettv;
8486 {
8487     long	line, col;
8488 #ifdef FEAT_VIRTUALEDIT
8489     long	coladd = 0;
8490 #endif
8491 
8492     if (argvars[1].v_type == VAR_UNKNOWN)
8493     {
8494 	pos_T	    pos;
8495 
8496 	if (list2fpos(argvars, &pos, NULL) == FAIL)
8497 	    return;
8498 	line = pos.lnum;
8499 	col = pos.col;
8500 #ifdef FEAT_VIRTUALEDIT
8501 	coladd = pos.coladd;
8502 #endif
8503     }
8504     else
8505     {
8506 	line = get_tv_lnum(argvars);
8507 	col = get_tv_number_chk(&argvars[1], NULL);
8508 #ifdef FEAT_VIRTUALEDIT
8509 	if (argvars[2].v_type != VAR_UNKNOWN)
8510 	    coladd = get_tv_number_chk(&argvars[2], NULL);
8511 #endif
8512     }
8513     if (line < 0 || col < 0
8514 #ifdef FEAT_VIRTUALEDIT
8515 			    || coladd < 0
8516 #endif
8517 	    )
8518 	return;		/* type error; errmsg already given */
8519     if (line > 0)
8520 	curwin->w_cursor.lnum = line;
8521     if (col > 0)
8522 	curwin->w_cursor.col = col - 1;
8523 #ifdef FEAT_VIRTUALEDIT
8524     curwin->w_cursor.coladd = coladd;
8525 #endif
8526 
8527     /* Make sure the cursor is in a valid position. */
8528     check_cursor();
8529 #ifdef FEAT_MBYTE
8530     /* Correct cursor for multi-byte character. */
8531     if (has_mbyte)
8532 	mb_adjust_cursor();
8533 #endif
8534 
8535     curwin->w_set_curswant = TRUE;
8536 }
8537 
8538 /*
8539  * "deepcopy()" function
8540  */
8541     static void
8542 f_deepcopy(argvars, rettv)
8543     typval_T	*argvars;
8544     typval_T	*rettv;
8545 {
8546     int		noref = 0;
8547 
8548     if (argvars[1].v_type != VAR_UNKNOWN)
8549 	noref = get_tv_number_chk(&argvars[1], NULL);
8550     if (noref < 0 || noref > 1)
8551 	EMSG(_(e_invarg));
8552     else
8553 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8554 }
8555 
8556 /*
8557  * "delete()" function
8558  */
8559     static void
8560 f_delete(argvars, rettv)
8561     typval_T	*argvars;
8562     typval_T	*rettv;
8563 {
8564     if (check_restricted() || check_secure())
8565 	rettv->vval.v_number = -1;
8566     else
8567 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8568 }
8569 
8570 /*
8571  * "did_filetype()" function
8572  */
8573 /*ARGSUSED*/
8574     static void
8575 f_did_filetype(argvars, rettv)
8576     typval_T	*argvars;
8577     typval_T	*rettv;
8578 {
8579 #ifdef FEAT_AUTOCMD
8580     rettv->vval.v_number = did_filetype;
8581 #else
8582     rettv->vval.v_number = 0;
8583 #endif
8584 }
8585 
8586 /*
8587  * "diff_filler()" function
8588  */
8589 /*ARGSUSED*/
8590     static void
8591 f_diff_filler(argvars, rettv)
8592     typval_T	*argvars;
8593     typval_T	*rettv;
8594 {
8595 #ifdef FEAT_DIFF
8596     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8597 #endif
8598 }
8599 
8600 /*
8601  * "diff_hlID()" function
8602  */
8603 /*ARGSUSED*/
8604     static void
8605 f_diff_hlID(argvars, rettv)
8606     typval_T	*argvars;
8607     typval_T	*rettv;
8608 {
8609 #ifdef FEAT_DIFF
8610     linenr_T		lnum = get_tv_lnum(argvars);
8611     static linenr_T	prev_lnum = 0;
8612     static int		changedtick = 0;
8613     static int		fnum = 0;
8614     static int		change_start = 0;
8615     static int		change_end = 0;
8616     static hlf_T	hlID = 0;
8617     int			filler_lines;
8618     int			col;
8619 
8620     if (lnum < 0)	/* ignore type error in {lnum} arg */
8621 	lnum = 0;
8622     if (lnum != prev_lnum
8623 	    || changedtick != curbuf->b_changedtick
8624 	    || fnum != curbuf->b_fnum)
8625     {
8626 	/* New line, buffer, change: need to get the values. */
8627 	filler_lines = diff_check(curwin, lnum);
8628 	if (filler_lines < 0)
8629 	{
8630 	    if (filler_lines == -1)
8631 	    {
8632 		change_start = MAXCOL;
8633 		change_end = -1;
8634 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8635 		    hlID = HLF_ADD;	/* added line */
8636 		else
8637 		    hlID = HLF_CHD;	/* changed line */
8638 	    }
8639 	    else
8640 		hlID = HLF_ADD;	/* added line */
8641 	}
8642 	else
8643 	    hlID = (hlf_T)0;
8644 	prev_lnum = lnum;
8645 	changedtick = curbuf->b_changedtick;
8646 	fnum = curbuf->b_fnum;
8647     }
8648 
8649     if (hlID == HLF_CHD || hlID == HLF_TXD)
8650     {
8651 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8652 	if (col >= change_start && col <= change_end)
8653 	    hlID = HLF_TXD;			/* changed text */
8654 	else
8655 	    hlID = HLF_CHD;			/* changed line */
8656     }
8657     rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
8658 #endif
8659 }
8660 
8661 /*
8662  * "empty({expr})" function
8663  */
8664     static void
8665 f_empty(argvars, rettv)
8666     typval_T	*argvars;
8667     typval_T	*rettv;
8668 {
8669     int		n;
8670 
8671     switch (argvars[0].v_type)
8672     {
8673 	case VAR_STRING:
8674 	case VAR_FUNC:
8675 	    n = argvars[0].vval.v_string == NULL
8676 					  || *argvars[0].vval.v_string == NUL;
8677 	    break;
8678 	case VAR_NUMBER:
8679 	    n = argvars[0].vval.v_number == 0;
8680 	    break;
8681 	case VAR_LIST:
8682 	    n = argvars[0].vval.v_list == NULL
8683 				  || argvars[0].vval.v_list->lv_first == NULL;
8684 	    break;
8685 	case VAR_DICT:
8686 	    n = argvars[0].vval.v_dict == NULL
8687 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8688 	    break;
8689 	default:
8690 	    EMSG2(_(e_intern2), "f_empty()");
8691 	    n = 0;
8692     }
8693 
8694     rettv->vval.v_number = n;
8695 }
8696 
8697 /*
8698  * "escape({string}, {chars})" function
8699  */
8700     static void
8701 f_escape(argvars, rettv)
8702     typval_T	*argvars;
8703     typval_T	*rettv;
8704 {
8705     char_u	buf[NUMBUFLEN];
8706 
8707     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8708 					 get_tv_string_buf(&argvars[1], buf));
8709     rettv->v_type = VAR_STRING;
8710 }
8711 
8712 /*
8713  * "eval()" function
8714  */
8715 /*ARGSUSED*/
8716     static void
8717 f_eval(argvars, rettv)
8718     typval_T	*argvars;
8719     typval_T	*rettv;
8720 {
8721     char_u	*s;
8722 
8723     s = get_tv_string_chk(&argvars[0]);
8724     if (s != NULL)
8725 	s = skipwhite(s);
8726 
8727     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8728     {
8729 	rettv->v_type = VAR_NUMBER;
8730 	rettv->vval.v_number = 0;
8731     }
8732     else if (*s != NUL)
8733 	EMSG(_(e_trailing));
8734 }
8735 
8736 /*
8737  * "eventhandler()" function
8738  */
8739 /*ARGSUSED*/
8740     static void
8741 f_eventhandler(argvars, rettv)
8742     typval_T	*argvars;
8743     typval_T	*rettv;
8744 {
8745     rettv->vval.v_number = vgetc_busy;
8746 }
8747 
8748 /*
8749  * "executable()" function
8750  */
8751     static void
8752 f_executable(argvars, rettv)
8753     typval_T	*argvars;
8754     typval_T	*rettv;
8755 {
8756     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8757 }
8758 
8759 /*
8760  * "exists()" function
8761  */
8762     static void
8763 f_exists(argvars, rettv)
8764     typval_T	*argvars;
8765     typval_T	*rettv;
8766 {
8767     char_u	*p;
8768     char_u	*name;
8769     int		n = FALSE;
8770     int		len = 0;
8771 
8772     p = get_tv_string(&argvars[0]);
8773     if (*p == '$')			/* environment variable */
8774     {
8775 	/* first try "normal" environment variables (fast) */
8776 	if (mch_getenv(p + 1) != NULL)
8777 	    n = TRUE;
8778 	else
8779 	{
8780 	    /* try expanding things like $VIM and ${HOME} */
8781 	    p = expand_env_save(p);
8782 	    if (p != NULL && *p != '$')
8783 		n = TRUE;
8784 	    vim_free(p);
8785 	}
8786     }
8787     else if (*p == '&' || *p == '+')			/* option */
8788 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8789     else if (*p == '*')			/* internal or user defined function */
8790     {
8791 	n = function_exists(p + 1);
8792     }
8793     else if (*p == ':')
8794     {
8795 	n = cmd_exists(p + 1);
8796     }
8797     else if (*p == '#')
8798     {
8799 #ifdef FEAT_AUTOCMD
8800 	if (p[1] == '#')
8801 	    n = autocmd_supported(p + 2);
8802 	else
8803 	    n = au_exists(p + 1);
8804 #endif
8805     }
8806     else				/* internal variable */
8807     {
8808 	char_u	    *tofree;
8809 	typval_T    tv;
8810 
8811 	/* get_name_len() takes care of expanding curly braces */
8812 	name = p;
8813 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8814 	if (len > 0)
8815 	{
8816 	    if (tofree != NULL)
8817 		name = tofree;
8818 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8819 	    if (n)
8820 	    {
8821 		/* handle d.key, l[idx], f(expr) */
8822 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8823 		if (n)
8824 		    clear_tv(&tv);
8825 	    }
8826 	}
8827 
8828 	vim_free(tofree);
8829     }
8830 
8831     rettv->vval.v_number = n;
8832 }
8833 
8834 /*
8835  * "expand()" function
8836  */
8837     static void
8838 f_expand(argvars, rettv)
8839     typval_T	*argvars;
8840     typval_T	*rettv;
8841 {
8842     char_u	*s;
8843     int		len;
8844     char_u	*errormsg;
8845     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8846     expand_T	xpc;
8847     int		error = FALSE;
8848 
8849     rettv->v_type = VAR_STRING;
8850     s = get_tv_string(&argvars[0]);
8851     if (*s == '%' || *s == '#' || *s == '<')
8852     {
8853 	++emsg_off;
8854 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8855 	--emsg_off;
8856     }
8857     else
8858     {
8859 	/* When the optional second argument is non-zero, don't remove matches
8860 	 * for 'suffixes' and 'wildignore' */
8861 	if (argvars[1].v_type != VAR_UNKNOWN
8862 				    && get_tv_number_chk(&argvars[1], &error))
8863 	    flags |= WILD_KEEP_ALL;
8864 	if (!error)
8865 	{
8866 	    ExpandInit(&xpc);
8867 	    xpc.xp_context = EXPAND_FILES;
8868 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8869 	}
8870 	else
8871 	    rettv->vval.v_string = NULL;
8872     }
8873 }
8874 
8875 /*
8876  * "extend(list, list [, idx])" function
8877  * "extend(dict, dict [, action])" function
8878  */
8879     static void
8880 f_extend(argvars, rettv)
8881     typval_T	*argvars;
8882     typval_T	*rettv;
8883 {
8884     rettv->vval.v_number = 0;
8885     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8886     {
8887 	list_T		*l1, *l2;
8888 	listitem_T	*item;
8889 	long		before;
8890 	int		error = FALSE;
8891 
8892 	l1 = argvars[0].vval.v_list;
8893 	l2 = argvars[1].vval.v_list;
8894 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8895 		&& l2 != NULL)
8896 	{
8897 	    if (argvars[2].v_type != VAR_UNKNOWN)
8898 	    {
8899 		before = get_tv_number_chk(&argvars[2], &error);
8900 		if (error)
8901 		    return;		/* type error; errmsg already given */
8902 
8903 		if (before == l1->lv_len)
8904 		    item = NULL;
8905 		else
8906 		{
8907 		    item = list_find(l1, before);
8908 		    if (item == NULL)
8909 		    {
8910 			EMSGN(_(e_listidx), before);
8911 			return;
8912 		    }
8913 		}
8914 	    }
8915 	    else
8916 		item = NULL;
8917 	    list_extend(l1, l2, item);
8918 
8919 	    copy_tv(&argvars[0], rettv);
8920 	}
8921     }
8922     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8923     {
8924 	dict_T		*d1, *d2;
8925 	dictitem_T	*di1;
8926 	char_u		*action;
8927 	int		i;
8928 	hashitem_T	*hi2;
8929 	int		todo;
8930 
8931 	d1 = argvars[0].vval.v_dict;
8932 	d2 = argvars[1].vval.v_dict;
8933 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8934 		&& d2 != NULL)
8935 	{
8936 	    /* Check the third argument. */
8937 	    if (argvars[2].v_type != VAR_UNKNOWN)
8938 	    {
8939 		static char *(av[]) = {"keep", "force", "error"};
8940 
8941 		action = get_tv_string_chk(&argvars[2]);
8942 		if (action == NULL)
8943 		    return;		/* type error; errmsg already given */
8944 		for (i = 0; i < 3; ++i)
8945 		    if (STRCMP(action, av[i]) == 0)
8946 			break;
8947 		if (i == 3)
8948 		{
8949 		    EMSG2(_(e_invarg2), action);
8950 		    return;
8951 		}
8952 	    }
8953 	    else
8954 		action = (char_u *)"force";
8955 
8956 	    /* Go over all entries in the second dict and add them to the
8957 	     * first dict. */
8958 	    todo = (int)d2->dv_hashtab.ht_used;
8959 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8960 	    {
8961 		if (!HASHITEM_EMPTY(hi2))
8962 		{
8963 		    --todo;
8964 		    di1 = dict_find(d1, hi2->hi_key, -1);
8965 		    if (di1 == NULL)
8966 		    {
8967 			di1 = dictitem_copy(HI2DI(hi2));
8968 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8969 			    dictitem_free(di1);
8970 		    }
8971 		    else if (*action == 'e')
8972 		    {
8973 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8974 			break;
8975 		    }
8976 		    else if (*action == 'f')
8977 		    {
8978 			clear_tv(&di1->di_tv);
8979 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8980 		    }
8981 		}
8982 	    }
8983 
8984 	    copy_tv(&argvars[0], rettv);
8985 	}
8986     }
8987     else
8988 	EMSG2(_(e_listdictarg), "extend()");
8989 }
8990 
8991 /*
8992  * "feedkeys()" function
8993  */
8994 /*ARGSUSED*/
8995     static void
8996 f_feedkeys(argvars, rettv)
8997     typval_T    *argvars;
8998     typval_T    *rettv;
8999 {
9000     int		remap = TRUE;
9001     char_u	*keys, *flags;
9002     char_u	nbuf[NUMBUFLEN];
9003     int		typed = FALSE;
9004     char_u	*keys_esc;
9005 
9006     rettv->vval.v_number = 0;
9007     keys = get_tv_string(&argvars[0]);
9008     if (*keys != NUL)
9009     {
9010 	if (argvars[1].v_type != VAR_UNKNOWN)
9011 	{
9012 	    flags = get_tv_string_buf(&argvars[1], nbuf);
9013 	    for ( ; *flags != NUL; ++flags)
9014 	    {
9015 		switch (*flags)
9016 		{
9017 		    case 'n': remap = FALSE; break;
9018 		    case 'm': remap = TRUE; break;
9019 		    case 't': typed = TRUE; break;
9020 		}
9021 	    }
9022 	}
9023 
9024 	/* Need to escape K_SPECIAL and CSI before putting the string in the
9025 	 * typeahead buffer. */
9026 	keys_esc = vim_strsave_escape_csi(keys);
9027 	if (keys_esc != NULL)
9028 	{
9029 	    ins_typebuf(keys_esc, (remap ? REMAP_YES : REMAP_NONE),
9030 					       typebuf.tb_len, !typed, FALSE);
9031 	    vim_free(keys_esc);
9032 	    typebuf_was_filled = TRUE;
9033 	}
9034     }
9035 }
9036 
9037 /*
9038  * "filereadable()" function
9039  */
9040     static void
9041 f_filereadable(argvars, rettv)
9042     typval_T	*argvars;
9043     typval_T	*rettv;
9044 {
9045     FILE	*fd;
9046     char_u	*p;
9047     int		n;
9048 
9049     p = get_tv_string(&argvars[0]);
9050     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
9051     {
9052 	n = TRUE;
9053 	fclose(fd);
9054     }
9055     else
9056 	n = FALSE;
9057 
9058     rettv->vval.v_number = n;
9059 }
9060 
9061 /*
9062  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
9063  * rights to write into.
9064  */
9065     static void
9066 f_filewritable(argvars, rettv)
9067     typval_T	*argvars;
9068     typval_T	*rettv;
9069 {
9070     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
9071 }
9072 
9073 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
9074 
9075     static void
9076 findfilendir(argvars, rettv, dir)
9077     typval_T	*argvars;
9078     typval_T	*rettv;
9079     int		dir;
9080 {
9081 #ifdef FEAT_SEARCHPATH
9082     char_u	*fname;
9083     char_u	*fresult = NULL;
9084     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
9085     char_u	*p;
9086     char_u	pathbuf[NUMBUFLEN];
9087     int		count = 1;
9088     int		first = TRUE;
9089     int		error = FALSE;
9090 #endif
9091 
9092     rettv->vval.v_string = NULL;
9093     rettv->v_type = VAR_STRING;
9094 
9095 #ifdef FEAT_SEARCHPATH
9096     fname = get_tv_string(&argvars[0]);
9097 
9098     if (argvars[1].v_type != VAR_UNKNOWN)
9099     {
9100 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
9101 	if (p == NULL)
9102 	    error = TRUE;
9103 	else
9104 	{
9105 	    if (*p != NUL)
9106 		path = p;
9107 
9108 	    if (argvars[2].v_type != VAR_UNKNOWN)
9109 		count = get_tv_number_chk(&argvars[2], &error);
9110 	}
9111     }
9112 
9113     if (count < 0 && rettv_list_alloc(rettv) == FAIL)
9114 	error = TRUE;
9115 
9116     if (*fname != NUL && !error)
9117     {
9118 	do
9119 	{
9120 	    if (rettv->v_type == VAR_STRING)
9121 		vim_free(fresult);
9122 	    fresult = find_file_in_path_option(first ? fname : NULL,
9123 					       first ? (int)STRLEN(fname) : 0,
9124 					0, first, path, dir, NULL,
9125 					dir ? (char_u *)"" : curbuf->b_p_sua);
9126 	    first = FALSE;
9127 
9128 	    if (fresult != NULL && rettv->v_type == VAR_LIST)
9129 		list_append_string(rettv->vval.v_list, fresult, -1);
9130 
9131 	} while ((rettv->v_type == VAR_LIST || --count > 0) && fresult != NULL);
9132     }
9133 
9134     if (rettv->v_type == VAR_STRING)
9135 	rettv->vval.v_string = fresult;
9136 #endif
9137 }
9138 
9139 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
9140 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
9141 
9142 /*
9143  * Implementation of map() and filter().
9144  */
9145     static void
9146 filter_map(argvars, rettv, map)
9147     typval_T	*argvars;
9148     typval_T	*rettv;
9149     int		map;
9150 {
9151     char_u	buf[NUMBUFLEN];
9152     char_u	*expr;
9153     listitem_T	*li, *nli;
9154     list_T	*l = NULL;
9155     dictitem_T	*di;
9156     hashtab_T	*ht;
9157     hashitem_T	*hi;
9158     dict_T	*d = NULL;
9159     typval_T	save_val;
9160     typval_T	save_key;
9161     int		rem;
9162     int		todo;
9163     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
9164     int		save_did_emsg;
9165 
9166     rettv->vval.v_number = 0;
9167     if (argvars[0].v_type == VAR_LIST)
9168     {
9169 	if ((l = argvars[0].vval.v_list) == NULL
9170 		|| (map && tv_check_lock(l->lv_lock, msg)))
9171 	    return;
9172     }
9173     else if (argvars[0].v_type == VAR_DICT)
9174     {
9175 	if ((d = argvars[0].vval.v_dict) == NULL
9176 		|| (map && tv_check_lock(d->dv_lock, msg)))
9177 	    return;
9178     }
9179     else
9180     {
9181 	EMSG2(_(e_listdictarg), msg);
9182 	return;
9183     }
9184 
9185     expr = get_tv_string_buf_chk(&argvars[1], buf);
9186     /* On type errors, the preceding call has already displayed an error
9187      * message.  Avoid a misleading error message for an empty string that
9188      * was not passed as argument. */
9189     if (expr != NULL)
9190     {
9191 	prepare_vimvar(VV_VAL, &save_val);
9192 	expr = skipwhite(expr);
9193 
9194 	/* We reset "did_emsg" to be able to detect whether an error
9195 	 * occurred during evaluation of the expression. */
9196 	save_did_emsg = did_emsg;
9197 	did_emsg = FALSE;
9198 
9199 	if (argvars[0].v_type == VAR_DICT)
9200 	{
9201 	    prepare_vimvar(VV_KEY, &save_key);
9202 	    vimvars[VV_KEY].vv_type = VAR_STRING;
9203 
9204 	    ht = &d->dv_hashtab;
9205 	    hash_lock(ht);
9206 	    todo = (int)ht->ht_used;
9207 	    for (hi = ht->ht_array; todo > 0; ++hi)
9208 	    {
9209 		if (!HASHITEM_EMPTY(hi))
9210 		{
9211 		    --todo;
9212 		    di = HI2DI(hi);
9213 		    if (tv_check_lock(di->di_tv.v_lock, msg))
9214 			break;
9215 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
9216 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL
9217 								  || did_emsg)
9218 			break;
9219 		    if (!map && rem)
9220 			dictitem_remove(d, di);
9221 		    clear_tv(&vimvars[VV_KEY].vv_tv);
9222 		}
9223 	    }
9224 	    hash_unlock(ht);
9225 
9226 	    restore_vimvar(VV_KEY, &save_key);
9227 	}
9228 	else
9229 	{
9230 	    for (li = l->lv_first; li != NULL; li = nli)
9231 	    {
9232 		if (tv_check_lock(li->li_tv.v_lock, msg))
9233 		    break;
9234 		nli = li->li_next;
9235 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
9236 								  || did_emsg)
9237 		    break;
9238 		if (!map && rem)
9239 		    listitem_remove(l, li);
9240 	    }
9241 	}
9242 
9243 	restore_vimvar(VV_VAL, &save_val);
9244 
9245 	did_emsg |= save_did_emsg;
9246     }
9247 
9248     copy_tv(&argvars[0], rettv);
9249 }
9250 
9251     static int
9252 filter_map_one(tv, expr, map, remp)
9253     typval_T	*tv;
9254     char_u	*expr;
9255     int		map;
9256     int		*remp;
9257 {
9258     typval_T	rettv;
9259     char_u	*s;
9260 
9261     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
9262     s = expr;
9263     if (eval1(&s, &rettv, TRUE) == FAIL)
9264 	return FAIL;
9265     if (*s != NUL)  /* check for trailing chars after expr */
9266     {
9267 	EMSG2(_(e_invexpr2), s);
9268 	return FAIL;
9269     }
9270     if (map)
9271     {
9272 	/* map(): replace the list item value */
9273 	clear_tv(tv);
9274 	rettv.v_lock = 0;
9275 	*tv = rettv;
9276     }
9277     else
9278     {
9279 	int	    error = FALSE;
9280 
9281 	/* filter(): when expr is zero remove the item */
9282 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
9283 	clear_tv(&rettv);
9284 	/* On type error, nothing has been removed; return FAIL to stop the
9285 	 * loop.  The error message was given by get_tv_number_chk(). */
9286 	if (error)
9287 	    return FAIL;
9288     }
9289     clear_tv(&vimvars[VV_VAL].vv_tv);
9290     return OK;
9291 }
9292 
9293 /*
9294  * "filter()" function
9295  */
9296     static void
9297 f_filter(argvars, rettv)
9298     typval_T	*argvars;
9299     typval_T	*rettv;
9300 {
9301     filter_map(argvars, rettv, FALSE);
9302 }
9303 
9304 /*
9305  * "finddir({fname}[, {path}[, {count}]])" function
9306  */
9307     static void
9308 f_finddir(argvars, rettv)
9309     typval_T	*argvars;
9310     typval_T	*rettv;
9311 {
9312     findfilendir(argvars, rettv, TRUE);
9313 }
9314 
9315 /*
9316  * "findfile({fname}[, {path}[, {count}]])" function
9317  */
9318     static void
9319 f_findfile(argvars, rettv)
9320     typval_T	*argvars;
9321     typval_T	*rettv;
9322 {
9323     findfilendir(argvars, rettv, FALSE);
9324 }
9325 
9326 /*
9327  * "fnamemodify({fname}, {mods})" function
9328  */
9329     static void
9330 f_fnamemodify(argvars, rettv)
9331     typval_T	*argvars;
9332     typval_T	*rettv;
9333 {
9334     char_u	*fname;
9335     char_u	*mods;
9336     int		usedlen = 0;
9337     int		len;
9338     char_u	*fbuf = NULL;
9339     char_u	buf[NUMBUFLEN];
9340 
9341     fname = get_tv_string_chk(&argvars[0]);
9342     mods = get_tv_string_buf_chk(&argvars[1], buf);
9343     if (fname == NULL || mods == NULL)
9344 	fname = NULL;
9345     else
9346     {
9347 	len = (int)STRLEN(fname);
9348 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
9349     }
9350 
9351     rettv->v_type = VAR_STRING;
9352     if (fname == NULL)
9353 	rettv->vval.v_string = NULL;
9354     else
9355 	rettv->vval.v_string = vim_strnsave(fname, len);
9356     vim_free(fbuf);
9357 }
9358 
9359 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
9360 
9361 /*
9362  * "foldclosed()" function
9363  */
9364     static void
9365 foldclosed_both(argvars, rettv, end)
9366     typval_T	*argvars;
9367     typval_T	*rettv;
9368     int		end;
9369 {
9370 #ifdef FEAT_FOLDING
9371     linenr_T	lnum;
9372     linenr_T	first, last;
9373 
9374     lnum = get_tv_lnum(argvars);
9375     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9376     {
9377 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
9378 	{
9379 	    if (end)
9380 		rettv->vval.v_number = (varnumber_T)last;
9381 	    else
9382 		rettv->vval.v_number = (varnumber_T)first;
9383 	    return;
9384 	}
9385     }
9386 #endif
9387     rettv->vval.v_number = -1;
9388 }
9389 
9390 /*
9391  * "foldclosed()" function
9392  */
9393     static void
9394 f_foldclosed(argvars, rettv)
9395     typval_T	*argvars;
9396     typval_T	*rettv;
9397 {
9398     foldclosed_both(argvars, rettv, FALSE);
9399 }
9400 
9401 /*
9402  * "foldclosedend()" function
9403  */
9404     static void
9405 f_foldclosedend(argvars, rettv)
9406     typval_T	*argvars;
9407     typval_T	*rettv;
9408 {
9409     foldclosed_both(argvars, rettv, TRUE);
9410 }
9411 
9412 /*
9413  * "foldlevel()" function
9414  */
9415     static void
9416 f_foldlevel(argvars, rettv)
9417     typval_T	*argvars;
9418     typval_T	*rettv;
9419 {
9420 #ifdef FEAT_FOLDING
9421     linenr_T	lnum;
9422 
9423     lnum = get_tv_lnum(argvars);
9424     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9425 	rettv->vval.v_number = foldLevel(lnum);
9426     else
9427 #endif
9428 	rettv->vval.v_number = 0;
9429 }
9430 
9431 /*
9432  * "foldtext()" function
9433  */
9434 /*ARGSUSED*/
9435     static void
9436 f_foldtext(argvars, rettv)
9437     typval_T	*argvars;
9438     typval_T	*rettv;
9439 {
9440 #ifdef FEAT_FOLDING
9441     linenr_T	lnum;
9442     char_u	*s;
9443     char_u	*r;
9444     int		len;
9445     char	*txt;
9446 #endif
9447 
9448     rettv->v_type = VAR_STRING;
9449     rettv->vval.v_string = NULL;
9450 #ifdef FEAT_FOLDING
9451     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
9452 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
9453 						 <= curbuf->b_ml.ml_line_count
9454 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
9455     {
9456 	/* Find first non-empty line in the fold. */
9457 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
9458 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9459 	{
9460 	    if (!linewhite(lnum))
9461 		break;
9462 	    ++lnum;
9463 	}
9464 
9465 	/* Find interesting text in this line. */
9466 	s = skipwhite(ml_get(lnum));
9467 	/* skip C comment-start */
9468 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9469 	{
9470 	    s = skipwhite(s + 2);
9471 	    if (*skipwhite(s) == NUL
9472 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9473 	    {
9474 		s = skipwhite(ml_get(lnum + 1));
9475 		if (*s == '*')
9476 		    s = skipwhite(s + 1);
9477 	    }
9478 	}
9479 	txt = _("+-%s%3ld lines: ");
9480 	r = alloc((unsigned)(STRLEN(txt)
9481 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9482 		    + 20				    /* for %3ld */
9483 		    + STRLEN(s)));			    /* concatenated */
9484 	if (r != NULL)
9485 	{
9486 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9487 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9488 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9489 	    len = (int)STRLEN(r);
9490 	    STRCAT(r, s);
9491 	    /* remove 'foldmarker' and 'commentstring' */
9492 	    foldtext_cleanup(r + len);
9493 	    rettv->vval.v_string = r;
9494 	}
9495     }
9496 #endif
9497 }
9498 
9499 /*
9500  * "foldtextresult(lnum)" function
9501  */
9502 /*ARGSUSED*/
9503     static void
9504 f_foldtextresult(argvars, rettv)
9505     typval_T	*argvars;
9506     typval_T	*rettv;
9507 {
9508 #ifdef FEAT_FOLDING
9509     linenr_T	lnum;
9510     char_u	*text;
9511     char_u	buf[51];
9512     foldinfo_T  foldinfo;
9513     int		fold_count;
9514 #endif
9515 
9516     rettv->v_type = VAR_STRING;
9517     rettv->vval.v_string = NULL;
9518 #ifdef FEAT_FOLDING
9519     lnum = get_tv_lnum(argvars);
9520     /* treat illegal types and illegal string values for {lnum} the same */
9521     if (lnum < 0)
9522 	lnum = 0;
9523     fold_count = foldedCount(curwin, lnum, &foldinfo);
9524     if (fold_count > 0)
9525     {
9526 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9527 							      &foldinfo, buf);
9528 	if (text == buf)
9529 	    text = vim_strsave(text);
9530 	rettv->vval.v_string = text;
9531     }
9532 #endif
9533 }
9534 
9535 /*
9536  * "foreground()" function
9537  */
9538 /*ARGSUSED*/
9539     static void
9540 f_foreground(argvars, rettv)
9541     typval_T	*argvars;
9542     typval_T	*rettv;
9543 {
9544     rettv->vval.v_number = 0;
9545 #ifdef FEAT_GUI
9546     if (gui.in_use)
9547 	gui_mch_set_foreground();
9548 #else
9549 # ifdef WIN32
9550     win32_set_foreground();
9551 # endif
9552 #endif
9553 }
9554 
9555 /*
9556  * "function()" function
9557  */
9558 /*ARGSUSED*/
9559     static void
9560 f_function(argvars, rettv)
9561     typval_T	*argvars;
9562     typval_T	*rettv;
9563 {
9564     char_u	*s;
9565 
9566     rettv->vval.v_number = 0;
9567     s = get_tv_string(&argvars[0]);
9568     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9569 	EMSG2(_(e_invarg2), s);
9570     else if (!function_exists(s))
9571 	EMSG2(_("E700: Unknown function: %s"), s);
9572     else
9573     {
9574 	rettv->vval.v_string = vim_strsave(s);
9575 	rettv->v_type = VAR_FUNC;
9576     }
9577 }
9578 
9579 /*
9580  * "garbagecollect()" function
9581  */
9582 /*ARGSUSED*/
9583     static void
9584 f_garbagecollect(argvars, rettv)
9585     typval_T	*argvars;
9586     typval_T	*rettv;
9587 {
9588     garbage_collect();
9589 }
9590 
9591 /*
9592  * "get()" function
9593  */
9594     static void
9595 f_get(argvars, rettv)
9596     typval_T	*argvars;
9597     typval_T	*rettv;
9598 {
9599     listitem_T	*li;
9600     list_T	*l;
9601     dictitem_T	*di;
9602     dict_T	*d;
9603     typval_T	*tv = NULL;
9604 
9605     if (argvars[0].v_type == VAR_LIST)
9606     {
9607 	if ((l = argvars[0].vval.v_list) != NULL)
9608 	{
9609 	    int		error = FALSE;
9610 
9611 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9612 	    if (!error && li != NULL)
9613 		tv = &li->li_tv;
9614 	}
9615     }
9616     else if (argvars[0].v_type == VAR_DICT)
9617     {
9618 	if ((d = argvars[0].vval.v_dict) != NULL)
9619 	{
9620 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9621 	    if (di != NULL)
9622 		tv = &di->di_tv;
9623 	}
9624     }
9625     else
9626 	EMSG2(_(e_listdictarg), "get()");
9627 
9628     if (tv == NULL)
9629     {
9630 	if (argvars[2].v_type == VAR_UNKNOWN)
9631 	    rettv->vval.v_number = 0;
9632 	else
9633 	    copy_tv(&argvars[2], rettv);
9634     }
9635     else
9636 	copy_tv(tv, rettv);
9637 }
9638 
9639 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9640 
9641 /*
9642  * Get line or list of lines from buffer "buf" into "rettv".
9643  * Return a range (from start to end) of lines in rettv from the specified
9644  * buffer.
9645  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9646  */
9647     static void
9648 get_buffer_lines(buf, start, end, retlist, rettv)
9649     buf_T	*buf;
9650     linenr_T	start;
9651     linenr_T	end;
9652     int		retlist;
9653     typval_T	*rettv;
9654 {
9655     char_u	*p;
9656 
9657     if (retlist)
9658     {
9659 	if (rettv_list_alloc(rettv) == FAIL)
9660 	    return;
9661     }
9662     else
9663 	rettv->vval.v_number = 0;
9664 
9665     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9666 	return;
9667 
9668     if (!retlist)
9669     {
9670 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9671 	    p = ml_get_buf(buf, start, FALSE);
9672 	else
9673 	    p = (char_u *)"";
9674 
9675 	rettv->v_type = VAR_STRING;
9676 	rettv->vval.v_string = vim_strsave(p);
9677     }
9678     else
9679     {
9680 	if (end < start)
9681 	    return;
9682 
9683 	if (start < 1)
9684 	    start = 1;
9685 	if (end > buf->b_ml.ml_line_count)
9686 	    end = buf->b_ml.ml_line_count;
9687 	while (start <= end)
9688 	    if (list_append_string(rettv->vval.v_list,
9689 				 ml_get_buf(buf, start++, FALSE), -1) == FAIL)
9690 		break;
9691     }
9692 }
9693 
9694 /*
9695  * "getbufline()" function
9696  */
9697     static void
9698 f_getbufline(argvars, rettv)
9699     typval_T	*argvars;
9700     typval_T	*rettv;
9701 {
9702     linenr_T	lnum;
9703     linenr_T	end;
9704     buf_T	*buf;
9705 
9706     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9707     ++emsg_off;
9708     buf = get_buf_tv(&argvars[0]);
9709     --emsg_off;
9710 
9711     lnum = get_tv_lnum_buf(&argvars[1], buf);
9712     if (argvars[2].v_type == VAR_UNKNOWN)
9713 	end = lnum;
9714     else
9715 	end = get_tv_lnum_buf(&argvars[2], buf);
9716 
9717     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9718 }
9719 
9720 /*
9721  * "getbufvar()" function
9722  */
9723     static void
9724 f_getbufvar(argvars, rettv)
9725     typval_T	*argvars;
9726     typval_T	*rettv;
9727 {
9728     buf_T	*buf;
9729     buf_T	*save_curbuf;
9730     char_u	*varname;
9731     dictitem_T	*v;
9732 
9733     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9734     varname = get_tv_string_chk(&argvars[1]);
9735     ++emsg_off;
9736     buf = get_buf_tv(&argvars[0]);
9737 
9738     rettv->v_type = VAR_STRING;
9739     rettv->vval.v_string = NULL;
9740 
9741     if (buf != NULL && varname != NULL)
9742     {
9743 	if (*varname == '&')	/* buffer-local-option */
9744 	{
9745 	    /* set curbuf to be our buf, temporarily */
9746 	    save_curbuf = curbuf;
9747 	    curbuf = buf;
9748 
9749 	    get_option_tv(&varname, rettv, TRUE);
9750 
9751 	    /* restore previous notion of curbuf */
9752 	    curbuf = save_curbuf;
9753 	}
9754 	else
9755 	{
9756 	    if (*varname == NUL)
9757 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9758 		 * scope prefix before the NUL byte is required by
9759 		 * find_var_in_ht(). */
9760 		varname = (char_u *)"b:" + 2;
9761 	    /* look up the variable */
9762 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9763 	    if (v != NULL)
9764 		copy_tv(&v->di_tv, rettv);
9765 	}
9766     }
9767 
9768     --emsg_off;
9769 }
9770 
9771 /*
9772  * "getchar()" function
9773  */
9774     static void
9775 f_getchar(argvars, rettv)
9776     typval_T	*argvars;
9777     typval_T	*rettv;
9778 {
9779     varnumber_T		n;
9780     int			error = FALSE;
9781 
9782     ++no_mapping;
9783     ++allow_keys;
9784     if (argvars[0].v_type == VAR_UNKNOWN)
9785 	/* getchar(): blocking wait. */
9786 	n = safe_vgetc();
9787     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9788 	/* getchar(1): only check if char avail */
9789 	n = vpeekc();
9790     else if (error || vpeekc() == NUL)
9791 	/* illegal argument or getchar(0) and no char avail: return zero */
9792 	n = 0;
9793     else
9794 	/* getchar(0) and char avail: return char */
9795 	n = safe_vgetc();
9796     --no_mapping;
9797     --allow_keys;
9798 
9799     rettv->vval.v_number = n;
9800     if (IS_SPECIAL(n) || mod_mask != 0)
9801     {
9802 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9803 	int		i = 0;
9804 
9805 	/* Turn a special key into three bytes, plus modifier. */
9806 	if (mod_mask != 0)
9807 	{
9808 	    temp[i++] = K_SPECIAL;
9809 	    temp[i++] = KS_MODIFIER;
9810 	    temp[i++] = mod_mask;
9811 	}
9812 	if (IS_SPECIAL(n))
9813 	{
9814 	    temp[i++] = K_SPECIAL;
9815 	    temp[i++] = K_SECOND(n);
9816 	    temp[i++] = K_THIRD(n);
9817 	}
9818 #ifdef FEAT_MBYTE
9819 	else if (has_mbyte)
9820 	    i += (*mb_char2bytes)(n, temp + i);
9821 #endif
9822 	else
9823 	    temp[i++] = n;
9824 	temp[i++] = NUL;
9825 	rettv->v_type = VAR_STRING;
9826 	rettv->vval.v_string = vim_strsave(temp);
9827     }
9828 }
9829 
9830 /*
9831  * "getcharmod()" function
9832  */
9833 /*ARGSUSED*/
9834     static void
9835 f_getcharmod(argvars, rettv)
9836     typval_T	*argvars;
9837     typval_T	*rettv;
9838 {
9839     rettv->vval.v_number = mod_mask;
9840 }
9841 
9842 /*
9843  * "getcmdline()" function
9844  */
9845 /*ARGSUSED*/
9846     static void
9847 f_getcmdline(argvars, rettv)
9848     typval_T	*argvars;
9849     typval_T	*rettv;
9850 {
9851     rettv->v_type = VAR_STRING;
9852     rettv->vval.v_string = get_cmdline_str();
9853 }
9854 
9855 /*
9856  * "getcmdpos()" function
9857  */
9858 /*ARGSUSED*/
9859     static void
9860 f_getcmdpos(argvars, rettv)
9861     typval_T	*argvars;
9862     typval_T	*rettv;
9863 {
9864     rettv->vval.v_number = get_cmdline_pos() + 1;
9865 }
9866 
9867 /*
9868  * "getcmdtype()" function
9869  */
9870 /*ARGSUSED*/
9871     static void
9872 f_getcmdtype(argvars, rettv)
9873     typval_T	*argvars;
9874     typval_T	*rettv;
9875 {
9876     rettv->v_type = VAR_STRING;
9877     rettv->vval.v_string = alloc(2);
9878     if (rettv->vval.v_string != NULL)
9879     {
9880 	rettv->vval.v_string[0] = get_cmdline_type();
9881 	rettv->vval.v_string[1] = NUL;
9882     }
9883 }
9884 
9885 /*
9886  * "getcwd()" function
9887  */
9888 /*ARGSUSED*/
9889     static void
9890 f_getcwd(argvars, rettv)
9891     typval_T	*argvars;
9892     typval_T	*rettv;
9893 {
9894     char_u	cwd[MAXPATHL];
9895 
9896     rettv->v_type = VAR_STRING;
9897     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9898 	rettv->vval.v_string = NULL;
9899     else
9900     {
9901 	rettv->vval.v_string = vim_strsave(cwd);
9902 #ifdef BACKSLASH_IN_FILENAME
9903 	if (rettv->vval.v_string != NULL)
9904 	    slash_adjust(rettv->vval.v_string);
9905 #endif
9906     }
9907 }
9908 
9909 /*
9910  * "getfontname()" function
9911  */
9912 /*ARGSUSED*/
9913     static void
9914 f_getfontname(argvars, rettv)
9915     typval_T	*argvars;
9916     typval_T	*rettv;
9917 {
9918     rettv->v_type = VAR_STRING;
9919     rettv->vval.v_string = NULL;
9920 #ifdef FEAT_GUI
9921     if (gui.in_use)
9922     {
9923 	GuiFont font;
9924 	char_u	*name = NULL;
9925 
9926 	if (argvars[0].v_type == VAR_UNKNOWN)
9927 	{
9928 	    /* Get the "Normal" font.  Either the name saved by
9929 	     * hl_set_font_name() or from the font ID. */
9930 	    font = gui.norm_font;
9931 	    name = hl_get_font_name();
9932 	}
9933 	else
9934 	{
9935 	    name = get_tv_string(&argvars[0]);
9936 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9937 		return;
9938 	    font = gui_mch_get_font(name, FALSE);
9939 	    if (font == NOFONT)
9940 		return;	    /* Invalid font name, return empty string. */
9941 	}
9942 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9943 	if (argvars[0].v_type != VAR_UNKNOWN)
9944 	    gui_mch_free_font(font);
9945     }
9946 #endif
9947 }
9948 
9949 /*
9950  * "getfperm({fname})" function
9951  */
9952     static void
9953 f_getfperm(argvars, rettv)
9954     typval_T	*argvars;
9955     typval_T	*rettv;
9956 {
9957     char_u	*fname;
9958     struct stat st;
9959     char_u	*perm = NULL;
9960     char_u	flags[] = "rwx";
9961     int		i;
9962 
9963     fname = get_tv_string(&argvars[0]);
9964 
9965     rettv->v_type = VAR_STRING;
9966     if (mch_stat((char *)fname, &st) >= 0)
9967     {
9968 	perm = vim_strsave((char_u *)"---------");
9969 	if (perm != NULL)
9970 	{
9971 	    for (i = 0; i < 9; i++)
9972 	    {
9973 		if (st.st_mode & (1 << (8 - i)))
9974 		    perm[i] = flags[i % 3];
9975 	    }
9976 	}
9977     }
9978     rettv->vval.v_string = perm;
9979 }
9980 
9981 /*
9982  * "getfsize({fname})" function
9983  */
9984     static void
9985 f_getfsize(argvars, rettv)
9986     typval_T	*argvars;
9987     typval_T	*rettv;
9988 {
9989     char_u	*fname;
9990     struct stat	st;
9991 
9992     fname = get_tv_string(&argvars[0]);
9993 
9994     rettv->v_type = VAR_NUMBER;
9995 
9996     if (mch_stat((char *)fname, &st) >= 0)
9997     {
9998 	if (mch_isdir(fname))
9999 	    rettv->vval.v_number = 0;
10000 	else
10001 	    rettv->vval.v_number = (varnumber_T)st.st_size;
10002     }
10003     else
10004 	  rettv->vval.v_number = -1;
10005 }
10006 
10007 /*
10008  * "getftime({fname})" function
10009  */
10010     static void
10011 f_getftime(argvars, rettv)
10012     typval_T	*argvars;
10013     typval_T	*rettv;
10014 {
10015     char_u	*fname;
10016     struct stat	st;
10017 
10018     fname = get_tv_string(&argvars[0]);
10019 
10020     if (mch_stat((char *)fname, &st) >= 0)
10021 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
10022     else
10023 	rettv->vval.v_number = -1;
10024 }
10025 
10026 /*
10027  * "getftype({fname})" function
10028  */
10029     static void
10030 f_getftype(argvars, rettv)
10031     typval_T	*argvars;
10032     typval_T	*rettv;
10033 {
10034     char_u	*fname;
10035     struct stat st;
10036     char_u	*type = NULL;
10037     char	*t;
10038 
10039     fname = get_tv_string(&argvars[0]);
10040 
10041     rettv->v_type = VAR_STRING;
10042     if (mch_lstat((char *)fname, &st) >= 0)
10043     {
10044 #ifdef S_ISREG
10045 	if (S_ISREG(st.st_mode))
10046 	    t = "file";
10047 	else if (S_ISDIR(st.st_mode))
10048 	    t = "dir";
10049 # ifdef S_ISLNK
10050 	else if (S_ISLNK(st.st_mode))
10051 	    t = "link";
10052 # endif
10053 # ifdef S_ISBLK
10054 	else if (S_ISBLK(st.st_mode))
10055 	    t = "bdev";
10056 # endif
10057 # ifdef S_ISCHR
10058 	else if (S_ISCHR(st.st_mode))
10059 	    t = "cdev";
10060 # endif
10061 # ifdef S_ISFIFO
10062 	else if (S_ISFIFO(st.st_mode))
10063 	    t = "fifo";
10064 # endif
10065 # ifdef S_ISSOCK
10066 	else if (S_ISSOCK(st.st_mode))
10067 	    t = "fifo";
10068 # endif
10069 	else
10070 	    t = "other";
10071 #else
10072 # ifdef S_IFMT
10073 	switch (st.st_mode & S_IFMT)
10074 	{
10075 	    case S_IFREG: t = "file"; break;
10076 	    case S_IFDIR: t = "dir"; break;
10077 #  ifdef S_IFLNK
10078 	    case S_IFLNK: t = "link"; break;
10079 #  endif
10080 #  ifdef S_IFBLK
10081 	    case S_IFBLK: t = "bdev"; break;
10082 #  endif
10083 #  ifdef S_IFCHR
10084 	    case S_IFCHR: t = "cdev"; break;
10085 #  endif
10086 #  ifdef S_IFIFO
10087 	    case S_IFIFO: t = "fifo"; break;
10088 #  endif
10089 #  ifdef S_IFSOCK
10090 	    case S_IFSOCK: t = "socket"; break;
10091 #  endif
10092 	    default: t = "other";
10093 	}
10094 # else
10095 	if (mch_isdir(fname))
10096 	    t = "dir";
10097 	else
10098 	    t = "file";
10099 # endif
10100 #endif
10101 	type = vim_strsave((char_u *)t);
10102     }
10103     rettv->vval.v_string = type;
10104 }
10105 
10106 /*
10107  * "getline(lnum, [end])" function
10108  */
10109     static void
10110 f_getline(argvars, rettv)
10111     typval_T	*argvars;
10112     typval_T	*rettv;
10113 {
10114     linenr_T	lnum;
10115     linenr_T	end;
10116     int		retlist;
10117 
10118     lnum = get_tv_lnum(argvars);
10119     if (argvars[1].v_type == VAR_UNKNOWN)
10120     {
10121 	end = 0;
10122 	retlist = FALSE;
10123     }
10124     else
10125     {
10126 	end = get_tv_lnum(&argvars[1]);
10127 	retlist = TRUE;
10128     }
10129 
10130     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
10131 }
10132 
10133 /*
10134  * "getpos(string)" function
10135  */
10136     static void
10137 f_getpos(argvars, rettv)
10138     typval_T	*argvars;
10139     typval_T	*rettv;
10140 {
10141     pos_T	*fp;
10142     list_T	*l;
10143     int		fnum = -1;
10144 
10145     if (rettv_list_alloc(rettv) == OK)
10146     {
10147 	l = rettv->vval.v_list;
10148 	fp = var2fpos(&argvars[0], TRUE, &fnum);
10149 	if (fnum != -1)
10150 	    list_append_number(l, (varnumber_T)fnum);
10151 	else
10152 	    list_append_number(l, (varnumber_T)0);
10153 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->lnum
10154 							    : (varnumber_T)0);
10155 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->col + 1
10156 							    : (varnumber_T)0);
10157 	list_append_number(l,
10158 #ifdef FEAT_VIRTUALEDIT
10159 				(fp != NULL) ? (varnumber_T)fp->coladd :
10160 #endif
10161 							      (varnumber_T)0);
10162     }
10163     else
10164 	rettv->vval.v_number = FALSE;
10165 }
10166 
10167 /*
10168  * "getqflist()" and "getloclist()" functions
10169  */
10170 /*ARGSUSED*/
10171     static void
10172 f_getqflist(argvars, rettv)
10173     typval_T	*argvars;
10174     typval_T	*rettv;
10175 {
10176 #ifdef FEAT_QUICKFIX
10177     win_T	*wp;
10178 #endif
10179 
10180     rettv->vval.v_number = FALSE;
10181 #ifdef FEAT_QUICKFIX
10182     if (rettv_list_alloc(rettv) == OK)
10183     {
10184 	wp = NULL;
10185 	if (argvars[0].v_type != VAR_UNKNOWN)	/* getloclist() */
10186 	{
10187 	    wp = find_win_by_nr(&argvars[0], NULL);
10188 	    if (wp == NULL)
10189 		return;
10190 	}
10191 
10192 	(void)get_errorlist(wp, rettv->vval.v_list);
10193     }
10194 #endif
10195 }
10196 
10197 /*
10198  * "getreg()" function
10199  */
10200     static void
10201 f_getreg(argvars, rettv)
10202     typval_T	*argvars;
10203     typval_T	*rettv;
10204 {
10205     char_u	*strregname;
10206     int		regname;
10207     int		arg2 = FALSE;
10208     int		error = FALSE;
10209 
10210     if (argvars[0].v_type != VAR_UNKNOWN)
10211     {
10212 	strregname = get_tv_string_chk(&argvars[0]);
10213 	error = strregname == NULL;
10214 	if (argvars[1].v_type != VAR_UNKNOWN)
10215 	    arg2 = get_tv_number_chk(&argvars[1], &error);
10216     }
10217     else
10218 	strregname = vimvars[VV_REG].vv_str;
10219     regname = (strregname == NULL ? '"' : *strregname);
10220     if (regname == 0)
10221 	regname = '"';
10222 
10223     rettv->v_type = VAR_STRING;
10224     rettv->vval.v_string = error ? NULL :
10225 				    get_reg_contents(regname, TRUE, arg2);
10226 }
10227 
10228 /*
10229  * "getregtype()" function
10230  */
10231     static void
10232 f_getregtype(argvars, rettv)
10233     typval_T	*argvars;
10234     typval_T	*rettv;
10235 {
10236     char_u	*strregname;
10237     int		regname;
10238     char_u	buf[NUMBUFLEN + 2];
10239     long	reglen = 0;
10240 
10241     if (argvars[0].v_type != VAR_UNKNOWN)
10242     {
10243 	strregname = get_tv_string_chk(&argvars[0]);
10244 	if (strregname == NULL)	    /* type error; errmsg already given */
10245 	{
10246 	    rettv->v_type = VAR_STRING;
10247 	    rettv->vval.v_string = NULL;
10248 	    return;
10249 	}
10250     }
10251     else
10252 	/* Default to v:register */
10253 	strregname = vimvars[VV_REG].vv_str;
10254 
10255     regname = (strregname == NULL ? '"' : *strregname);
10256     if (regname == 0)
10257 	regname = '"';
10258 
10259     buf[0] = NUL;
10260     buf[1] = NUL;
10261     switch (get_reg_type(regname, &reglen))
10262     {
10263 	case MLINE: buf[0] = 'V'; break;
10264 	case MCHAR: buf[0] = 'v'; break;
10265 #ifdef FEAT_VISUAL
10266 	case MBLOCK:
10267 		buf[0] = Ctrl_V;
10268 		sprintf((char *)buf + 1, "%ld", reglen + 1);
10269 		break;
10270 #endif
10271     }
10272     rettv->v_type = VAR_STRING;
10273     rettv->vval.v_string = vim_strsave(buf);
10274 }
10275 
10276 /*
10277  * "gettabwinvar()" function
10278  */
10279     static void
10280 f_gettabwinvar(argvars, rettv)
10281     typval_T	*argvars;
10282     typval_T	*rettv;
10283 {
10284     getwinvar(argvars, rettv, 1);
10285 }
10286 
10287 /*
10288  * "getwinposx()" function
10289  */
10290 /*ARGSUSED*/
10291     static void
10292 f_getwinposx(argvars, rettv)
10293     typval_T	*argvars;
10294     typval_T	*rettv;
10295 {
10296     rettv->vval.v_number = -1;
10297 #ifdef FEAT_GUI
10298     if (gui.in_use)
10299     {
10300 	int	    x, y;
10301 
10302 	if (gui_mch_get_winpos(&x, &y) == OK)
10303 	    rettv->vval.v_number = x;
10304     }
10305 #endif
10306 }
10307 
10308 /*
10309  * "getwinposy()" function
10310  */
10311 /*ARGSUSED*/
10312     static void
10313 f_getwinposy(argvars, rettv)
10314     typval_T	*argvars;
10315     typval_T	*rettv;
10316 {
10317     rettv->vval.v_number = -1;
10318 #ifdef FEAT_GUI
10319     if (gui.in_use)
10320     {
10321 	int	    x, y;
10322 
10323 	if (gui_mch_get_winpos(&x, &y) == OK)
10324 	    rettv->vval.v_number = y;
10325     }
10326 #endif
10327 }
10328 
10329 /*
10330  * Find window specifed by "vp" in tabpage "tp".
10331  */
10332     static win_T *
10333 find_win_by_nr(vp, tp)
10334     typval_T	*vp;
10335     tabpage_T	*tp;	    /* NULL for current tab page */
10336 {
10337 #ifdef FEAT_WINDOWS
10338     win_T	*wp;
10339 #endif
10340     int		nr;
10341 
10342     nr = get_tv_number_chk(vp, NULL);
10343 
10344 #ifdef FEAT_WINDOWS
10345     if (nr < 0)
10346 	return NULL;
10347     if (nr == 0)
10348 	return curwin;
10349 
10350     for (wp = (tp == NULL || tp == curtab) ? firstwin : tp->tp_firstwin;
10351 						  wp != NULL; wp = wp->w_next)
10352 	if (--nr <= 0)
10353 	    break;
10354     return wp;
10355 #else
10356     if (nr == 0 || nr == 1)
10357 	return curwin;
10358     return NULL;
10359 #endif
10360 }
10361 
10362 /*
10363  * "getwinvar()" function
10364  */
10365     static void
10366 f_getwinvar(argvars, rettv)
10367     typval_T	*argvars;
10368     typval_T	*rettv;
10369 {
10370     getwinvar(argvars, rettv, 0);
10371 }
10372 
10373 /*
10374  * getwinvar() and gettabwinvar()
10375  */
10376     static void
10377 getwinvar(argvars, rettv, off)
10378     typval_T	*argvars;
10379     typval_T	*rettv;
10380     int		off;	    /* 1 for gettabwinvar() */
10381 {
10382     win_T	*win, *oldcurwin;
10383     char_u	*varname;
10384     dictitem_T	*v;
10385     tabpage_T	*tp;
10386 
10387 #ifdef FEAT_WINDOWS
10388     if (off == 1)
10389 	tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
10390     else
10391 	tp = curtab;
10392 #endif
10393     win = find_win_by_nr(&argvars[off], tp);
10394     varname = get_tv_string_chk(&argvars[off + 1]);
10395     ++emsg_off;
10396 
10397     rettv->v_type = VAR_STRING;
10398     rettv->vval.v_string = NULL;
10399 
10400     if (win != NULL && varname != NULL)
10401     {
10402 	if (*varname == '&')	/* window-local-option */
10403 	{
10404 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
10405 	     * that we can get buffer-local options. */
10406 	    oldcurwin = curwin;
10407 	    curwin = win;
10408 	    curbuf = win->w_buffer;
10409 
10410 	    get_option_tv(&varname, rettv, 1);
10411 
10412 	    /* restore previous notion of curwin */
10413 	    curwin = oldcurwin;
10414 	    curbuf = curwin->w_buffer;
10415 	}
10416 	else
10417 	{
10418 	    if (*varname == NUL)
10419 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
10420 		 * scope prefix before the NUL byte is required by
10421 		 * find_var_in_ht(). */
10422 		varname = (char_u *)"w:" + 2;
10423 	    /* look up the variable */
10424 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
10425 	    if (v != NULL)
10426 		copy_tv(&v->di_tv, rettv);
10427 	}
10428     }
10429 
10430     --emsg_off;
10431 }
10432 
10433 /*
10434  * "glob()" function
10435  */
10436     static void
10437 f_glob(argvars, rettv)
10438     typval_T	*argvars;
10439     typval_T	*rettv;
10440 {
10441     expand_T	xpc;
10442 
10443     ExpandInit(&xpc);
10444     xpc.xp_context = EXPAND_FILES;
10445     rettv->v_type = VAR_STRING;
10446     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
10447 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
10448 }
10449 
10450 /*
10451  * "globpath()" function
10452  */
10453     static void
10454 f_globpath(argvars, rettv)
10455     typval_T	*argvars;
10456     typval_T	*rettv;
10457 {
10458     char_u	buf1[NUMBUFLEN];
10459     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
10460 
10461     rettv->v_type = VAR_STRING;
10462     if (file == NULL)
10463 	rettv->vval.v_string = NULL;
10464     else
10465 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
10466 }
10467 
10468 /*
10469  * "has()" function
10470  */
10471     static void
10472 f_has(argvars, rettv)
10473     typval_T	*argvars;
10474     typval_T	*rettv;
10475 {
10476     int		i;
10477     char_u	*name;
10478     int		n = FALSE;
10479     static char	*(has_list[]) =
10480     {
10481 #ifdef AMIGA
10482 	"amiga",
10483 # ifdef FEAT_ARP
10484 	"arp",
10485 # endif
10486 #endif
10487 #ifdef __BEOS__
10488 	"beos",
10489 #endif
10490 #ifdef MSDOS
10491 # ifdef DJGPP
10492 	"dos32",
10493 # else
10494 	"dos16",
10495 # endif
10496 #endif
10497 #ifdef MACOS
10498 	"mac",
10499 #endif
10500 #if defined(MACOS_X_UNIX)
10501 	"macunix",
10502 #endif
10503 #ifdef OS2
10504 	"os2",
10505 #endif
10506 #ifdef __QNX__
10507 	"qnx",
10508 #endif
10509 #ifdef RISCOS
10510 	"riscos",
10511 #endif
10512 #ifdef UNIX
10513 	"unix",
10514 #endif
10515 #ifdef VMS
10516 	"vms",
10517 #endif
10518 #ifdef WIN16
10519 	"win16",
10520 #endif
10521 #ifdef WIN32
10522 	"win32",
10523 #endif
10524 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
10525 	"win32unix",
10526 #endif
10527 #ifdef WIN64
10528 	"win64",
10529 #endif
10530 #ifdef EBCDIC
10531 	"ebcdic",
10532 #endif
10533 #ifndef CASE_INSENSITIVE_FILENAME
10534 	"fname_case",
10535 #endif
10536 #ifdef FEAT_ARABIC
10537 	"arabic",
10538 #endif
10539 #ifdef FEAT_AUTOCMD
10540 	"autocmd",
10541 #endif
10542 #ifdef FEAT_BEVAL
10543 	"balloon_eval",
10544 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10545 	"balloon_multiline",
10546 # endif
10547 #endif
10548 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10549 	"builtin_terms",
10550 # ifdef ALL_BUILTIN_TCAPS
10551 	"all_builtin_terms",
10552 # endif
10553 #endif
10554 #ifdef FEAT_BYTEOFF
10555 	"byte_offset",
10556 #endif
10557 #ifdef FEAT_CINDENT
10558 	"cindent",
10559 #endif
10560 #ifdef FEAT_CLIENTSERVER
10561 	"clientserver",
10562 #endif
10563 #ifdef FEAT_CLIPBOARD
10564 	"clipboard",
10565 #endif
10566 #ifdef FEAT_CMDL_COMPL
10567 	"cmdline_compl",
10568 #endif
10569 #ifdef FEAT_CMDHIST
10570 	"cmdline_hist",
10571 #endif
10572 #ifdef FEAT_COMMENTS
10573 	"comments",
10574 #endif
10575 #ifdef FEAT_CRYPT
10576 	"cryptv",
10577 #endif
10578 #ifdef FEAT_CSCOPE
10579 	"cscope",
10580 #endif
10581 #ifdef CURSOR_SHAPE
10582 	"cursorshape",
10583 #endif
10584 #ifdef DEBUG
10585 	"debug",
10586 #endif
10587 #ifdef FEAT_CON_DIALOG
10588 	"dialog_con",
10589 #endif
10590 #ifdef FEAT_GUI_DIALOG
10591 	"dialog_gui",
10592 #endif
10593 #ifdef FEAT_DIFF
10594 	"diff",
10595 #endif
10596 #ifdef FEAT_DIGRAPHS
10597 	"digraphs",
10598 #endif
10599 #ifdef FEAT_DND
10600 	"dnd",
10601 #endif
10602 #ifdef FEAT_EMACS_TAGS
10603 	"emacs_tags",
10604 #endif
10605 	"eval",	    /* always present, of course! */
10606 #ifdef FEAT_EX_EXTRA
10607 	"ex_extra",
10608 #endif
10609 #ifdef FEAT_SEARCH_EXTRA
10610 	"extra_search",
10611 #endif
10612 #ifdef FEAT_FKMAP
10613 	"farsi",
10614 #endif
10615 #ifdef FEAT_SEARCHPATH
10616 	"file_in_path",
10617 #endif
10618 #if defined(UNIX) && !defined(USE_SYSTEM)
10619 	"filterpipe",
10620 #endif
10621 #ifdef FEAT_FIND_ID
10622 	"find_in_path",
10623 #endif
10624 #ifdef FEAT_FOLDING
10625 	"folding",
10626 #endif
10627 #ifdef FEAT_FOOTER
10628 	"footer",
10629 #endif
10630 #if !defined(USE_SYSTEM) && defined(UNIX)
10631 	"fork",
10632 #endif
10633 #ifdef FEAT_GETTEXT
10634 	"gettext",
10635 #endif
10636 #ifdef FEAT_GUI
10637 	"gui",
10638 #endif
10639 #ifdef FEAT_GUI_ATHENA
10640 # ifdef FEAT_GUI_NEXTAW
10641 	"gui_neXtaw",
10642 # else
10643 	"gui_athena",
10644 # endif
10645 #endif
10646 #ifdef FEAT_GUI_GTK
10647 	"gui_gtk",
10648 # ifdef HAVE_GTK2
10649 	"gui_gtk2",
10650 # endif
10651 #endif
10652 #ifdef FEAT_GUI_MAC
10653 	"gui_mac",
10654 #endif
10655 #ifdef FEAT_GUI_MOTIF
10656 	"gui_motif",
10657 #endif
10658 #ifdef FEAT_GUI_PHOTON
10659 	"gui_photon",
10660 #endif
10661 #ifdef FEAT_GUI_W16
10662 	"gui_win16",
10663 #endif
10664 #ifdef FEAT_GUI_W32
10665 	"gui_win32",
10666 #endif
10667 #ifdef FEAT_HANGULIN
10668 	"hangul_input",
10669 #endif
10670 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10671 	"iconv",
10672 #endif
10673 #ifdef FEAT_INS_EXPAND
10674 	"insert_expand",
10675 #endif
10676 #ifdef FEAT_JUMPLIST
10677 	"jumplist",
10678 #endif
10679 #ifdef FEAT_KEYMAP
10680 	"keymap",
10681 #endif
10682 #ifdef FEAT_LANGMAP
10683 	"langmap",
10684 #endif
10685 #ifdef FEAT_LIBCALL
10686 	"libcall",
10687 #endif
10688 #ifdef FEAT_LINEBREAK
10689 	"linebreak",
10690 #endif
10691 #ifdef FEAT_LISP
10692 	"lispindent",
10693 #endif
10694 #ifdef FEAT_LISTCMDS
10695 	"listcmds",
10696 #endif
10697 #ifdef FEAT_LOCALMAP
10698 	"localmap",
10699 #endif
10700 #ifdef FEAT_MENU
10701 	"menu",
10702 #endif
10703 #ifdef FEAT_SESSION
10704 	"mksession",
10705 #endif
10706 #ifdef FEAT_MODIFY_FNAME
10707 	"modify_fname",
10708 #endif
10709 #ifdef FEAT_MOUSE
10710 	"mouse",
10711 #endif
10712 #ifdef FEAT_MOUSESHAPE
10713 	"mouseshape",
10714 #endif
10715 #if defined(UNIX) || defined(VMS)
10716 # ifdef FEAT_MOUSE_DEC
10717 	"mouse_dec",
10718 # endif
10719 # ifdef FEAT_MOUSE_GPM
10720 	"mouse_gpm",
10721 # endif
10722 # ifdef FEAT_MOUSE_JSB
10723 	"mouse_jsbterm",
10724 # endif
10725 # ifdef FEAT_MOUSE_NET
10726 	"mouse_netterm",
10727 # endif
10728 # ifdef FEAT_MOUSE_PTERM
10729 	"mouse_pterm",
10730 # endif
10731 # ifdef FEAT_MOUSE_XTERM
10732 	"mouse_xterm",
10733 # endif
10734 #endif
10735 #ifdef FEAT_MBYTE
10736 	"multi_byte",
10737 #endif
10738 #ifdef FEAT_MBYTE_IME
10739 	"multi_byte_ime",
10740 #endif
10741 #ifdef FEAT_MULTI_LANG
10742 	"multi_lang",
10743 #endif
10744 #ifdef FEAT_MZSCHEME
10745 #ifndef DYNAMIC_MZSCHEME
10746 	"mzscheme",
10747 #endif
10748 #endif
10749 #ifdef FEAT_OLE
10750 	"ole",
10751 #endif
10752 #ifdef FEAT_OSFILETYPE
10753 	"osfiletype",
10754 #endif
10755 #ifdef FEAT_PATH_EXTRA
10756 	"path_extra",
10757 #endif
10758 #ifdef FEAT_PERL
10759 #ifndef DYNAMIC_PERL
10760 	"perl",
10761 #endif
10762 #endif
10763 #ifdef FEAT_PYTHON
10764 #ifndef DYNAMIC_PYTHON
10765 	"python",
10766 #endif
10767 #endif
10768 #ifdef FEAT_POSTSCRIPT
10769 	"postscript",
10770 #endif
10771 #ifdef FEAT_PRINTER
10772 	"printer",
10773 #endif
10774 #ifdef FEAT_PROFILE
10775 	"profile",
10776 #endif
10777 #ifdef FEAT_RELTIME
10778 	"reltime",
10779 #endif
10780 #ifdef FEAT_QUICKFIX
10781 	"quickfix",
10782 #endif
10783 #ifdef FEAT_RIGHTLEFT
10784 	"rightleft",
10785 #endif
10786 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10787 	"ruby",
10788 #endif
10789 #ifdef FEAT_SCROLLBIND
10790 	"scrollbind",
10791 #endif
10792 #ifdef FEAT_CMDL_INFO
10793 	"showcmd",
10794 	"cmdline_info",
10795 #endif
10796 #ifdef FEAT_SIGNS
10797 	"signs",
10798 #endif
10799 #ifdef FEAT_SMARTINDENT
10800 	"smartindent",
10801 #endif
10802 #ifdef FEAT_SNIFF
10803 	"sniff",
10804 #endif
10805 #ifdef FEAT_STL_OPT
10806 	"statusline",
10807 #endif
10808 #ifdef FEAT_SUN_WORKSHOP
10809 	"sun_workshop",
10810 #endif
10811 #ifdef FEAT_NETBEANS_INTG
10812 	"netbeans_intg",
10813 #endif
10814 #ifdef FEAT_SPELL
10815 	"spell",
10816 #endif
10817 #ifdef FEAT_SYN_HL
10818 	"syntax",
10819 #endif
10820 #if defined(USE_SYSTEM) || !defined(UNIX)
10821 	"system",
10822 #endif
10823 #ifdef FEAT_TAG_BINS
10824 	"tag_binary",
10825 #endif
10826 #ifdef FEAT_TAG_OLDSTATIC
10827 	"tag_old_static",
10828 #endif
10829 #ifdef FEAT_TAG_ANYWHITE
10830 	"tag_any_white",
10831 #endif
10832 #ifdef FEAT_TCL
10833 # ifndef DYNAMIC_TCL
10834 	"tcl",
10835 # endif
10836 #endif
10837 #ifdef TERMINFO
10838 	"terminfo",
10839 #endif
10840 #ifdef FEAT_TERMRESPONSE
10841 	"termresponse",
10842 #endif
10843 #ifdef FEAT_TEXTOBJ
10844 	"textobjects",
10845 #endif
10846 #ifdef HAVE_TGETENT
10847 	"tgetent",
10848 #endif
10849 #ifdef FEAT_TITLE
10850 	"title",
10851 #endif
10852 #ifdef FEAT_TOOLBAR
10853 	"toolbar",
10854 #endif
10855 #ifdef FEAT_USR_CMDS
10856 	"user-commands",    /* was accidentally included in 5.4 */
10857 	"user_commands",
10858 #endif
10859 #ifdef FEAT_VIMINFO
10860 	"viminfo",
10861 #endif
10862 #ifdef FEAT_VERTSPLIT
10863 	"vertsplit",
10864 #endif
10865 #ifdef FEAT_VIRTUALEDIT
10866 	"virtualedit",
10867 #endif
10868 #ifdef FEAT_VISUAL
10869 	"visual",
10870 #endif
10871 #ifdef FEAT_VISUALEXTRA
10872 	"visualextra",
10873 #endif
10874 #ifdef FEAT_VREPLACE
10875 	"vreplace",
10876 #endif
10877 #ifdef FEAT_WILDIGN
10878 	"wildignore",
10879 #endif
10880 #ifdef FEAT_WILDMENU
10881 	"wildmenu",
10882 #endif
10883 #ifdef FEAT_WINDOWS
10884 	"windows",
10885 #endif
10886 #ifdef FEAT_WAK
10887 	"winaltkeys",
10888 #endif
10889 #ifdef FEAT_WRITEBACKUP
10890 	"writebackup",
10891 #endif
10892 #ifdef FEAT_XIM
10893 	"xim",
10894 #endif
10895 #ifdef FEAT_XFONTSET
10896 	"xfontset",
10897 #endif
10898 #ifdef USE_XSMP
10899 	"xsmp",
10900 #endif
10901 #ifdef USE_XSMP_INTERACT
10902 	"xsmp_interact",
10903 #endif
10904 #ifdef FEAT_XCLIPBOARD
10905 	"xterm_clipboard",
10906 #endif
10907 #ifdef FEAT_XTERM_SAVE
10908 	"xterm_save",
10909 #endif
10910 #if defined(UNIX) && defined(FEAT_X11)
10911 	"X11",
10912 #endif
10913 	NULL
10914     };
10915 
10916     name = get_tv_string(&argvars[0]);
10917     for (i = 0; has_list[i] != NULL; ++i)
10918 	if (STRICMP(name, has_list[i]) == 0)
10919 	{
10920 	    n = TRUE;
10921 	    break;
10922 	}
10923 
10924     if (n == FALSE)
10925     {
10926 	if (STRNICMP(name, "patch", 5) == 0)
10927 	    n = has_patch(atoi((char *)name + 5));
10928 	else if (STRICMP(name, "vim_starting") == 0)
10929 	    n = (starting != 0);
10930 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10931 	else if (STRICMP(name, "balloon_multiline") == 0)
10932 	    n = multiline_balloon_available();
10933 #endif
10934 #ifdef DYNAMIC_TCL
10935 	else if (STRICMP(name, "tcl") == 0)
10936 	    n = tcl_enabled(FALSE);
10937 #endif
10938 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10939 	else if (STRICMP(name, "iconv") == 0)
10940 	    n = iconv_enabled(FALSE);
10941 #endif
10942 #ifdef DYNAMIC_MZSCHEME
10943 	else if (STRICMP(name, "mzscheme") == 0)
10944 	    n = mzscheme_enabled(FALSE);
10945 #endif
10946 #ifdef DYNAMIC_RUBY
10947 	else if (STRICMP(name, "ruby") == 0)
10948 	    n = ruby_enabled(FALSE);
10949 #endif
10950 #ifdef DYNAMIC_PYTHON
10951 	else if (STRICMP(name, "python") == 0)
10952 	    n = python_enabled(FALSE);
10953 #endif
10954 #ifdef DYNAMIC_PERL
10955 	else if (STRICMP(name, "perl") == 0)
10956 	    n = perl_enabled(FALSE);
10957 #endif
10958 #ifdef FEAT_GUI
10959 	else if (STRICMP(name, "gui_running") == 0)
10960 	    n = (gui.in_use || gui.starting);
10961 # ifdef FEAT_GUI_W32
10962 	else if (STRICMP(name, "gui_win32s") == 0)
10963 	    n = gui_is_win32s();
10964 # endif
10965 # ifdef FEAT_BROWSE
10966 	else if (STRICMP(name, "browse") == 0)
10967 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10968 # endif
10969 #endif
10970 #ifdef FEAT_SYN_HL
10971 	else if (STRICMP(name, "syntax_items") == 0)
10972 	    n = syntax_present(curbuf);
10973 #endif
10974 #if defined(WIN3264)
10975 	else if (STRICMP(name, "win95") == 0)
10976 	    n = mch_windows95();
10977 #endif
10978 #ifdef FEAT_NETBEANS_INTG
10979 	else if (STRICMP(name, "netbeans_enabled") == 0)
10980 	    n = usingNetbeans;
10981 #endif
10982     }
10983 
10984     rettv->vval.v_number = n;
10985 }
10986 
10987 /*
10988  * "has_key()" function
10989  */
10990     static void
10991 f_has_key(argvars, rettv)
10992     typval_T	*argvars;
10993     typval_T	*rettv;
10994 {
10995     rettv->vval.v_number = 0;
10996     if (argvars[0].v_type != VAR_DICT)
10997     {
10998 	EMSG(_(e_dictreq));
10999 	return;
11000     }
11001     if (argvars[0].vval.v_dict == NULL)
11002 	return;
11003 
11004     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
11005 				      get_tv_string(&argvars[1]), -1) != NULL;
11006 }
11007 
11008 /*
11009  * "hasmapto()" function
11010  */
11011     static void
11012 f_hasmapto(argvars, rettv)
11013     typval_T	*argvars;
11014     typval_T	*rettv;
11015 {
11016     char_u	*name;
11017     char_u	*mode;
11018     char_u	buf[NUMBUFLEN];
11019     int		abbr = FALSE;
11020 
11021     name = get_tv_string(&argvars[0]);
11022     if (argvars[1].v_type == VAR_UNKNOWN)
11023 	mode = (char_u *)"nvo";
11024     else
11025     {
11026 	mode = get_tv_string_buf(&argvars[1], buf);
11027 	if (argvars[2].v_type != VAR_UNKNOWN)
11028 	    abbr = get_tv_number(&argvars[2]);
11029     }
11030 
11031     if (map_to_exists(name, mode, abbr))
11032 	rettv->vval.v_number = TRUE;
11033     else
11034 	rettv->vval.v_number = FALSE;
11035 }
11036 
11037 /*
11038  * "histadd()" function
11039  */
11040 /*ARGSUSED*/
11041     static void
11042 f_histadd(argvars, rettv)
11043     typval_T	*argvars;
11044     typval_T	*rettv;
11045 {
11046 #ifdef FEAT_CMDHIST
11047     int		histype;
11048     char_u	*str;
11049     char_u	buf[NUMBUFLEN];
11050 #endif
11051 
11052     rettv->vval.v_number = FALSE;
11053     if (check_restricted() || check_secure())
11054 	return;
11055 #ifdef FEAT_CMDHIST
11056     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
11057     histype = str != NULL ? get_histtype(str) : -1;
11058     if (histype >= 0)
11059     {
11060 	str = get_tv_string_buf(&argvars[1], buf);
11061 	if (*str != NUL)
11062 	{
11063 	    add_to_history(histype, str, FALSE, NUL);
11064 	    rettv->vval.v_number = TRUE;
11065 	    return;
11066 	}
11067     }
11068 #endif
11069 }
11070 
11071 /*
11072  * "histdel()" function
11073  */
11074 /*ARGSUSED*/
11075     static void
11076 f_histdel(argvars, rettv)
11077     typval_T	*argvars;
11078     typval_T	*rettv;
11079 {
11080 #ifdef FEAT_CMDHIST
11081     int		n;
11082     char_u	buf[NUMBUFLEN];
11083     char_u	*str;
11084 
11085     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
11086     if (str == NULL)
11087 	n = 0;
11088     else if (argvars[1].v_type == VAR_UNKNOWN)
11089 	/* only one argument: clear entire history */
11090 	n = clr_history(get_histtype(str));
11091     else if (argvars[1].v_type == VAR_NUMBER)
11092 	/* index given: remove that entry */
11093 	n = del_history_idx(get_histtype(str),
11094 					  (int)get_tv_number(&argvars[1]));
11095     else
11096 	/* string given: remove all matching entries */
11097 	n = del_history_entry(get_histtype(str),
11098 				      get_tv_string_buf(&argvars[1], buf));
11099     rettv->vval.v_number = n;
11100 #else
11101     rettv->vval.v_number = 0;
11102 #endif
11103 }
11104 
11105 /*
11106  * "histget()" function
11107  */
11108 /*ARGSUSED*/
11109     static void
11110 f_histget(argvars, rettv)
11111     typval_T	*argvars;
11112     typval_T	*rettv;
11113 {
11114 #ifdef FEAT_CMDHIST
11115     int		type;
11116     int		idx;
11117     char_u	*str;
11118 
11119     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
11120     if (str == NULL)
11121 	rettv->vval.v_string = NULL;
11122     else
11123     {
11124 	type = get_histtype(str);
11125 	if (argvars[1].v_type == VAR_UNKNOWN)
11126 	    idx = get_history_idx(type);
11127 	else
11128 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
11129 						    /* -1 on type error */
11130 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
11131     }
11132 #else
11133     rettv->vval.v_string = NULL;
11134 #endif
11135     rettv->v_type = VAR_STRING;
11136 }
11137 
11138 /*
11139  * "histnr()" function
11140  */
11141 /*ARGSUSED*/
11142     static void
11143 f_histnr(argvars, rettv)
11144     typval_T	*argvars;
11145     typval_T	*rettv;
11146 {
11147     int		i;
11148 
11149 #ifdef FEAT_CMDHIST
11150     char_u	*history = get_tv_string_chk(&argvars[0]);
11151 
11152     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
11153     if (i >= HIST_CMD && i < HIST_COUNT)
11154 	i = get_history_idx(i);
11155     else
11156 #endif
11157 	i = -1;
11158     rettv->vval.v_number = i;
11159 }
11160 
11161 /*
11162  * "highlightID(name)" function
11163  */
11164     static void
11165 f_hlID(argvars, rettv)
11166     typval_T	*argvars;
11167     typval_T	*rettv;
11168 {
11169     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
11170 }
11171 
11172 /*
11173  * "highlight_exists()" function
11174  */
11175     static void
11176 f_hlexists(argvars, rettv)
11177     typval_T	*argvars;
11178     typval_T	*rettv;
11179 {
11180     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
11181 }
11182 
11183 /*
11184  * "hostname()" function
11185  */
11186 /*ARGSUSED*/
11187     static void
11188 f_hostname(argvars, rettv)
11189     typval_T	*argvars;
11190     typval_T	*rettv;
11191 {
11192     char_u hostname[256];
11193 
11194     mch_get_host_name(hostname, 256);
11195     rettv->v_type = VAR_STRING;
11196     rettv->vval.v_string = vim_strsave(hostname);
11197 }
11198 
11199 /*
11200  * iconv() function
11201  */
11202 /*ARGSUSED*/
11203     static void
11204 f_iconv(argvars, rettv)
11205     typval_T	*argvars;
11206     typval_T	*rettv;
11207 {
11208 #ifdef FEAT_MBYTE
11209     char_u	buf1[NUMBUFLEN];
11210     char_u	buf2[NUMBUFLEN];
11211     char_u	*from, *to, *str;
11212     vimconv_T	vimconv;
11213 #endif
11214 
11215     rettv->v_type = VAR_STRING;
11216     rettv->vval.v_string = NULL;
11217 
11218 #ifdef FEAT_MBYTE
11219     str = get_tv_string(&argvars[0]);
11220     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
11221     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
11222     vimconv.vc_type = CONV_NONE;
11223     convert_setup(&vimconv, from, to);
11224 
11225     /* If the encodings are equal, no conversion needed. */
11226     if (vimconv.vc_type == CONV_NONE)
11227 	rettv->vval.v_string = vim_strsave(str);
11228     else
11229 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
11230 
11231     convert_setup(&vimconv, NULL, NULL);
11232     vim_free(from);
11233     vim_free(to);
11234 #endif
11235 }
11236 
11237 /*
11238  * "indent()" function
11239  */
11240     static void
11241 f_indent(argvars, rettv)
11242     typval_T	*argvars;
11243     typval_T	*rettv;
11244 {
11245     linenr_T	lnum;
11246 
11247     lnum = get_tv_lnum(argvars);
11248     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11249 	rettv->vval.v_number = get_indent_lnum(lnum);
11250     else
11251 	rettv->vval.v_number = -1;
11252 }
11253 
11254 /*
11255  * "index()" function
11256  */
11257     static void
11258 f_index(argvars, rettv)
11259     typval_T	*argvars;
11260     typval_T	*rettv;
11261 {
11262     list_T	*l;
11263     listitem_T	*item;
11264     long	idx = 0;
11265     int		ic = FALSE;
11266 
11267     rettv->vval.v_number = -1;
11268     if (argvars[0].v_type != VAR_LIST)
11269     {
11270 	EMSG(_(e_listreq));
11271 	return;
11272     }
11273     l = argvars[0].vval.v_list;
11274     if (l != NULL)
11275     {
11276 	item = l->lv_first;
11277 	if (argvars[2].v_type != VAR_UNKNOWN)
11278 	{
11279 	    int		error = FALSE;
11280 
11281 	    /* Start at specified item.  Use the cached index that list_find()
11282 	     * sets, so that a negative number also works. */
11283 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
11284 	    idx = l->lv_idx;
11285 	    if (argvars[3].v_type != VAR_UNKNOWN)
11286 		ic = get_tv_number_chk(&argvars[3], &error);
11287 	    if (error)
11288 		item = NULL;
11289 	}
11290 
11291 	for ( ; item != NULL; item = item->li_next, ++idx)
11292 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
11293 	    {
11294 		rettv->vval.v_number = idx;
11295 		break;
11296 	    }
11297     }
11298 }
11299 
11300 static int inputsecret_flag = 0;
11301 
11302 /*
11303  * "input()" function
11304  *     Also handles inputsecret() when inputsecret is set.
11305  */
11306     static void
11307 f_input(argvars, rettv)
11308     typval_T	*argvars;
11309     typval_T	*rettv;
11310 {
11311     char_u	*prompt = get_tv_string_chk(&argvars[0]);
11312     char_u	*p = NULL;
11313     int		c;
11314     char_u	buf[NUMBUFLEN];
11315     int		cmd_silent_save = cmd_silent;
11316     char_u	*defstr = (char_u *)"";
11317     int		xp_type = EXPAND_NOTHING;
11318     char_u	*xp_arg = NULL;
11319 
11320     rettv->v_type = VAR_STRING;
11321 
11322 #ifdef NO_CONSOLE_INPUT
11323     /* While starting up, there is no place to enter text. */
11324     if (no_console_input())
11325     {
11326 	rettv->vval.v_string = NULL;
11327 	return;
11328     }
11329 #endif
11330 
11331     cmd_silent = FALSE;		/* Want to see the prompt. */
11332     if (prompt != NULL)
11333     {
11334 	/* Only the part of the message after the last NL is considered as
11335 	 * prompt for the command line */
11336 	p = vim_strrchr(prompt, '\n');
11337 	if (p == NULL)
11338 	    p = prompt;
11339 	else
11340 	{
11341 	    ++p;
11342 	    c = *p;
11343 	    *p = NUL;
11344 	    msg_start();
11345 	    msg_clr_eos();
11346 	    msg_puts_attr(prompt, echo_attr);
11347 	    msg_didout = FALSE;
11348 	    msg_starthere();
11349 	    *p = c;
11350 	}
11351 	cmdline_row = msg_row;
11352 
11353 	if (argvars[1].v_type != VAR_UNKNOWN)
11354 	{
11355 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
11356 	    if (defstr != NULL)
11357 		stuffReadbuffSpec(defstr);
11358 
11359 	    if (argvars[2].v_type != VAR_UNKNOWN)
11360 	    {
11361 		char_u	*xp_name;
11362 		int		xp_namelen;
11363 		long	argt;
11364 
11365 		rettv->vval.v_string = NULL;
11366 
11367 		xp_name = get_tv_string_buf_chk(&argvars[2], buf);
11368 		if (xp_name == NULL)
11369 		    return;
11370 
11371 		xp_namelen = (int)STRLEN(xp_name);
11372 
11373 		if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
11374 							     &xp_arg) == FAIL)
11375 		    return;
11376 	    }
11377 	}
11378 
11379 	if (defstr != NULL)
11380 	    rettv->vval.v_string =
11381 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr,
11382 				  xp_type, xp_arg);
11383 
11384 	vim_free(xp_arg);
11385 
11386 	/* since the user typed this, no need to wait for return */
11387 	need_wait_return = FALSE;
11388 	msg_didout = FALSE;
11389     }
11390     cmd_silent = cmd_silent_save;
11391 }
11392 
11393 /*
11394  * "inputdialog()" function
11395  */
11396     static void
11397 f_inputdialog(argvars, rettv)
11398     typval_T	*argvars;
11399     typval_T	*rettv;
11400 {
11401 #if defined(FEAT_GUI_TEXTDIALOG)
11402     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
11403     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
11404     {
11405 	char_u	*message;
11406 	char_u	buf[NUMBUFLEN];
11407 	char_u	*defstr = (char_u *)"";
11408 
11409 	message = get_tv_string_chk(&argvars[0]);
11410 	if (argvars[1].v_type != VAR_UNKNOWN
11411 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
11412 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
11413 	else
11414 	    IObuff[0] = NUL;
11415 	if (message != NULL && defstr != NULL
11416 		&& do_dialog(VIM_QUESTION, NULL, message,
11417 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
11418 	    rettv->vval.v_string = vim_strsave(IObuff);
11419 	else
11420 	{
11421 	    if (message != NULL && defstr != NULL
11422 					&& argvars[1].v_type != VAR_UNKNOWN
11423 					&& argvars[2].v_type != VAR_UNKNOWN)
11424 		rettv->vval.v_string = vim_strsave(
11425 				      get_tv_string_buf(&argvars[2], buf));
11426 	    else
11427 		rettv->vval.v_string = NULL;
11428 	}
11429 	rettv->v_type = VAR_STRING;
11430     }
11431     else
11432 #endif
11433 	f_input(argvars, rettv);
11434 }
11435 
11436 /*
11437  * "inputlist()" function
11438  */
11439     static void
11440 f_inputlist(argvars, rettv)
11441     typval_T	*argvars;
11442     typval_T	*rettv;
11443 {
11444     listitem_T	*li;
11445     int		selected;
11446     int		mouse_used;
11447 
11448     rettv->vval.v_number = 0;
11449 #ifdef NO_CONSOLE_INPUT
11450     /* While starting up, there is no place to enter text. */
11451     if (no_console_input())
11452 	return;
11453 #endif
11454     if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
11455     {
11456 	EMSG2(_(e_listarg), "inputlist()");
11457 	return;
11458     }
11459 
11460     msg_start();
11461     lines_left = Rows;	/* avoid more prompt */
11462     msg_scroll = TRUE;
11463     msg_clr_eos();
11464 
11465     for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
11466     {
11467 	msg_puts(get_tv_string(&li->li_tv));
11468 	msg_putchar('\n');
11469     }
11470 
11471     /* Ask for choice. */
11472     selected = prompt_for_number(&mouse_used);
11473     if (mouse_used)
11474 	selected -= lines_left;
11475 
11476     rettv->vval.v_number = selected;
11477 }
11478 
11479 
11480 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
11481 
11482 /*
11483  * "inputrestore()" function
11484  */
11485 /*ARGSUSED*/
11486     static void
11487 f_inputrestore(argvars, rettv)
11488     typval_T	*argvars;
11489     typval_T	*rettv;
11490 {
11491     if (ga_userinput.ga_len > 0)
11492     {
11493 	--ga_userinput.ga_len;
11494 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
11495 						       + ga_userinput.ga_len);
11496 	rettv->vval.v_number = 0; /* OK */
11497     }
11498     else if (p_verbose > 1)
11499     {
11500 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
11501 	rettv->vval.v_number = 1; /* Failed */
11502     }
11503 }
11504 
11505 /*
11506  * "inputsave()" function
11507  */
11508 /*ARGSUSED*/
11509     static void
11510 f_inputsave(argvars, rettv)
11511     typval_T	*argvars;
11512     typval_T	*rettv;
11513 {
11514     /* Add an entry to the stack of typehead storage. */
11515     if (ga_grow(&ga_userinput, 1) == OK)
11516     {
11517 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
11518 						       + ga_userinput.ga_len);
11519 	++ga_userinput.ga_len;
11520 	rettv->vval.v_number = 0; /* OK */
11521     }
11522     else
11523 	rettv->vval.v_number = 1; /* Failed */
11524 }
11525 
11526 /*
11527  * "inputsecret()" function
11528  */
11529     static void
11530 f_inputsecret(argvars, rettv)
11531     typval_T	*argvars;
11532     typval_T	*rettv;
11533 {
11534     ++cmdline_star;
11535     ++inputsecret_flag;
11536     f_input(argvars, rettv);
11537     --cmdline_star;
11538     --inputsecret_flag;
11539 }
11540 
11541 /*
11542  * "insert()" function
11543  */
11544     static void
11545 f_insert(argvars, rettv)
11546     typval_T	*argvars;
11547     typval_T	*rettv;
11548 {
11549     long	before = 0;
11550     listitem_T	*item;
11551     list_T	*l;
11552     int		error = FALSE;
11553 
11554     rettv->vval.v_number = 0;
11555     if (argvars[0].v_type != VAR_LIST)
11556 	EMSG2(_(e_listarg), "insert()");
11557     else if ((l = argvars[0].vval.v_list) != NULL
11558 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
11559     {
11560 	if (argvars[2].v_type != VAR_UNKNOWN)
11561 	    before = get_tv_number_chk(&argvars[2], &error);
11562 	if (error)
11563 	    return;		/* type error; errmsg already given */
11564 
11565 	if (before == l->lv_len)
11566 	    item = NULL;
11567 	else
11568 	{
11569 	    item = list_find(l, before);
11570 	    if (item == NULL)
11571 	    {
11572 		EMSGN(_(e_listidx), before);
11573 		l = NULL;
11574 	    }
11575 	}
11576 	if (l != NULL)
11577 	{
11578 	    list_insert_tv(l, &argvars[1], item);
11579 	    copy_tv(&argvars[0], rettv);
11580 	}
11581     }
11582 }
11583 
11584 /*
11585  * "isdirectory()" function
11586  */
11587     static void
11588 f_isdirectory(argvars, rettv)
11589     typval_T	*argvars;
11590     typval_T	*rettv;
11591 {
11592     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
11593 }
11594 
11595 /*
11596  * "islocked()" function
11597  */
11598     static void
11599 f_islocked(argvars, rettv)
11600     typval_T	*argvars;
11601     typval_T	*rettv;
11602 {
11603     lval_T	lv;
11604     char_u	*end;
11605     dictitem_T	*di;
11606 
11607     rettv->vval.v_number = -1;
11608     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
11609 							     FNE_CHECK_START);
11610     if (end != NULL && lv.ll_name != NULL)
11611     {
11612 	if (*end != NUL)
11613 	    EMSG(_(e_trailing));
11614 	else
11615 	{
11616 	    if (lv.ll_tv == NULL)
11617 	    {
11618 		if (check_changedtick(lv.ll_name))
11619 		    rettv->vval.v_number = 1;	    /* always locked */
11620 		else
11621 		{
11622 		    di = find_var(lv.ll_name, NULL);
11623 		    if (di != NULL)
11624 		    {
11625 			/* Consider a variable locked when:
11626 			 * 1. the variable itself is locked
11627 			 * 2. the value of the variable is locked.
11628 			 * 3. the List or Dict value is locked.
11629 			 */
11630 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11631 						  || tv_islocked(&di->di_tv));
11632 		    }
11633 		}
11634 	    }
11635 	    else if (lv.ll_range)
11636 		EMSG(_("E786: Range not allowed"));
11637 	    else if (lv.ll_newkey != NULL)
11638 		EMSG2(_(e_dictkey), lv.ll_newkey);
11639 	    else if (lv.ll_list != NULL)
11640 		/* List item. */
11641 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11642 	    else
11643 		/* Dictionary item. */
11644 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11645 	}
11646     }
11647 
11648     clear_lval(&lv);
11649 }
11650 
11651 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11652 
11653 /*
11654  * Turn a dict into a list:
11655  * "what" == 0: list of keys
11656  * "what" == 1: list of values
11657  * "what" == 2: list of items
11658  */
11659     static void
11660 dict_list(argvars, rettv, what)
11661     typval_T	*argvars;
11662     typval_T	*rettv;
11663     int		what;
11664 {
11665     list_T	*l2;
11666     dictitem_T	*di;
11667     hashitem_T	*hi;
11668     listitem_T	*li;
11669     listitem_T	*li2;
11670     dict_T	*d;
11671     int		todo;
11672 
11673     rettv->vval.v_number = 0;
11674     if (argvars[0].v_type != VAR_DICT)
11675     {
11676 	EMSG(_(e_dictreq));
11677 	return;
11678     }
11679     if ((d = argvars[0].vval.v_dict) == NULL)
11680 	return;
11681 
11682     if (rettv_list_alloc(rettv) == FAIL)
11683 	return;
11684 
11685     todo = (int)d->dv_hashtab.ht_used;
11686     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11687     {
11688 	if (!HASHITEM_EMPTY(hi))
11689 	{
11690 	    --todo;
11691 	    di = HI2DI(hi);
11692 
11693 	    li = listitem_alloc();
11694 	    if (li == NULL)
11695 		break;
11696 	    list_append(rettv->vval.v_list, li);
11697 
11698 	    if (what == 0)
11699 	    {
11700 		/* keys() */
11701 		li->li_tv.v_type = VAR_STRING;
11702 		li->li_tv.v_lock = 0;
11703 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11704 	    }
11705 	    else if (what == 1)
11706 	    {
11707 		/* values() */
11708 		copy_tv(&di->di_tv, &li->li_tv);
11709 	    }
11710 	    else
11711 	    {
11712 		/* items() */
11713 		l2 = list_alloc();
11714 		li->li_tv.v_type = VAR_LIST;
11715 		li->li_tv.v_lock = 0;
11716 		li->li_tv.vval.v_list = l2;
11717 		if (l2 == NULL)
11718 		    break;
11719 		++l2->lv_refcount;
11720 
11721 		li2 = listitem_alloc();
11722 		if (li2 == NULL)
11723 		    break;
11724 		list_append(l2, li2);
11725 		li2->li_tv.v_type = VAR_STRING;
11726 		li2->li_tv.v_lock = 0;
11727 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11728 
11729 		li2 = listitem_alloc();
11730 		if (li2 == NULL)
11731 		    break;
11732 		list_append(l2, li2);
11733 		copy_tv(&di->di_tv, &li2->li_tv);
11734 	    }
11735 	}
11736     }
11737 }
11738 
11739 /*
11740  * "items(dict)" function
11741  */
11742     static void
11743 f_items(argvars, rettv)
11744     typval_T	*argvars;
11745     typval_T	*rettv;
11746 {
11747     dict_list(argvars, rettv, 2);
11748 }
11749 
11750 /*
11751  * "join()" function
11752  */
11753     static void
11754 f_join(argvars, rettv)
11755     typval_T	*argvars;
11756     typval_T	*rettv;
11757 {
11758     garray_T	ga;
11759     char_u	*sep;
11760 
11761     rettv->vval.v_number = 0;
11762     if (argvars[0].v_type != VAR_LIST)
11763     {
11764 	EMSG(_(e_listreq));
11765 	return;
11766     }
11767     if (argvars[0].vval.v_list == NULL)
11768 	return;
11769     if (argvars[1].v_type == VAR_UNKNOWN)
11770 	sep = (char_u *)" ";
11771     else
11772 	sep = get_tv_string_chk(&argvars[1]);
11773 
11774     rettv->v_type = VAR_STRING;
11775 
11776     if (sep != NULL)
11777     {
11778 	ga_init2(&ga, (int)sizeof(char), 80);
11779 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE, 0);
11780 	ga_append(&ga, NUL);
11781 	rettv->vval.v_string = (char_u *)ga.ga_data;
11782     }
11783     else
11784 	rettv->vval.v_string = NULL;
11785 }
11786 
11787 /*
11788  * "keys()" function
11789  */
11790     static void
11791 f_keys(argvars, rettv)
11792     typval_T	*argvars;
11793     typval_T	*rettv;
11794 {
11795     dict_list(argvars, rettv, 0);
11796 }
11797 
11798 /*
11799  * "last_buffer_nr()" function.
11800  */
11801 /*ARGSUSED*/
11802     static void
11803 f_last_buffer_nr(argvars, rettv)
11804     typval_T	*argvars;
11805     typval_T	*rettv;
11806 {
11807     int		n = 0;
11808     buf_T	*buf;
11809 
11810     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11811 	if (n < buf->b_fnum)
11812 	    n = buf->b_fnum;
11813 
11814     rettv->vval.v_number = n;
11815 }
11816 
11817 /*
11818  * "len()" function
11819  */
11820     static void
11821 f_len(argvars, rettv)
11822     typval_T	*argvars;
11823     typval_T	*rettv;
11824 {
11825     switch (argvars[0].v_type)
11826     {
11827 	case VAR_STRING:
11828 	case VAR_NUMBER:
11829 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11830 					       get_tv_string(&argvars[0]));
11831 	    break;
11832 	case VAR_LIST:
11833 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11834 	    break;
11835 	case VAR_DICT:
11836 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11837 	    break;
11838 	default:
11839 	    EMSG(_("E701: Invalid type for len()"));
11840 	    break;
11841     }
11842 }
11843 
11844 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11845 
11846     static void
11847 libcall_common(argvars, rettv, type)
11848     typval_T	*argvars;
11849     typval_T	*rettv;
11850     int		type;
11851 {
11852 #ifdef FEAT_LIBCALL
11853     char_u		*string_in;
11854     char_u		**string_result;
11855     int			nr_result;
11856 #endif
11857 
11858     rettv->v_type = type;
11859     if (type == VAR_NUMBER)
11860 	rettv->vval.v_number = 0;
11861     else
11862 	rettv->vval.v_string = NULL;
11863 
11864     if (check_restricted() || check_secure())
11865 	return;
11866 
11867 #ifdef FEAT_LIBCALL
11868     /* The first two args must be strings, otherwise its meaningless */
11869     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11870     {
11871 	string_in = NULL;
11872 	if (argvars[2].v_type == VAR_STRING)
11873 	    string_in = argvars[2].vval.v_string;
11874 	if (type == VAR_NUMBER)
11875 	    string_result = NULL;
11876 	else
11877 	    string_result = &rettv->vval.v_string;
11878 	if (mch_libcall(argvars[0].vval.v_string,
11879 			     argvars[1].vval.v_string,
11880 			     string_in,
11881 			     argvars[2].vval.v_number,
11882 			     string_result,
11883 			     &nr_result) == OK
11884 		&& type == VAR_NUMBER)
11885 	    rettv->vval.v_number = nr_result;
11886     }
11887 #endif
11888 }
11889 
11890 /*
11891  * "libcall()" function
11892  */
11893     static void
11894 f_libcall(argvars, rettv)
11895     typval_T	*argvars;
11896     typval_T	*rettv;
11897 {
11898     libcall_common(argvars, rettv, VAR_STRING);
11899 }
11900 
11901 /*
11902  * "libcallnr()" function
11903  */
11904     static void
11905 f_libcallnr(argvars, rettv)
11906     typval_T	*argvars;
11907     typval_T	*rettv;
11908 {
11909     libcall_common(argvars, rettv, VAR_NUMBER);
11910 }
11911 
11912 /*
11913  * "line(string)" function
11914  */
11915     static void
11916 f_line(argvars, rettv)
11917     typval_T	*argvars;
11918     typval_T	*rettv;
11919 {
11920     linenr_T	lnum = 0;
11921     pos_T	*fp;
11922     int		fnum;
11923 
11924     fp = var2fpos(&argvars[0], TRUE, &fnum);
11925     if (fp != NULL)
11926 	lnum = fp->lnum;
11927     rettv->vval.v_number = lnum;
11928 }
11929 
11930 /*
11931  * "line2byte(lnum)" function
11932  */
11933 /*ARGSUSED*/
11934     static void
11935 f_line2byte(argvars, rettv)
11936     typval_T	*argvars;
11937     typval_T	*rettv;
11938 {
11939 #ifndef FEAT_BYTEOFF
11940     rettv->vval.v_number = -1;
11941 #else
11942     linenr_T	lnum;
11943 
11944     lnum = get_tv_lnum(argvars);
11945     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11946 	rettv->vval.v_number = -1;
11947     else
11948 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11949     if (rettv->vval.v_number >= 0)
11950 	++rettv->vval.v_number;
11951 #endif
11952 }
11953 
11954 /*
11955  * "lispindent(lnum)" function
11956  */
11957     static void
11958 f_lispindent(argvars, rettv)
11959     typval_T	*argvars;
11960     typval_T	*rettv;
11961 {
11962 #ifdef FEAT_LISP
11963     pos_T	pos;
11964     linenr_T	lnum;
11965 
11966     pos = curwin->w_cursor;
11967     lnum = get_tv_lnum(argvars);
11968     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11969     {
11970 	curwin->w_cursor.lnum = lnum;
11971 	rettv->vval.v_number = get_lisp_indent();
11972 	curwin->w_cursor = pos;
11973     }
11974     else
11975 #endif
11976 	rettv->vval.v_number = -1;
11977 }
11978 
11979 /*
11980  * "localtime()" function
11981  */
11982 /*ARGSUSED*/
11983     static void
11984 f_localtime(argvars, rettv)
11985     typval_T	*argvars;
11986     typval_T	*rettv;
11987 {
11988     rettv->vval.v_number = (varnumber_T)time(NULL);
11989 }
11990 
11991 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11992 
11993     static void
11994 get_maparg(argvars, rettv, exact)
11995     typval_T	*argvars;
11996     typval_T	*rettv;
11997     int		exact;
11998 {
11999     char_u	*keys;
12000     char_u	*which;
12001     char_u	buf[NUMBUFLEN];
12002     char_u	*keys_buf = NULL;
12003     char_u	*rhs;
12004     int		mode;
12005     garray_T	ga;
12006     int		abbr = FALSE;
12007 
12008     /* return empty string for failure */
12009     rettv->v_type = VAR_STRING;
12010     rettv->vval.v_string = NULL;
12011 
12012     keys = get_tv_string(&argvars[0]);
12013     if (*keys == NUL)
12014 	return;
12015 
12016     if (argvars[1].v_type != VAR_UNKNOWN)
12017     {
12018 	which = get_tv_string_buf_chk(&argvars[1], buf);
12019 	if (argvars[2].v_type != VAR_UNKNOWN)
12020 	    abbr = get_tv_number(&argvars[2]);
12021     }
12022     else
12023 	which = (char_u *)"";
12024     if (which == NULL)
12025 	return;
12026 
12027     mode = get_map_mode(&which, 0);
12028 
12029     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
12030     rhs = check_map(keys, mode, exact, FALSE, abbr);
12031     vim_free(keys_buf);
12032     if (rhs != NULL)
12033     {
12034 	ga_init(&ga);
12035 	ga.ga_itemsize = 1;
12036 	ga.ga_growsize = 40;
12037 
12038 	while (*rhs != NUL)
12039 	    ga_concat(&ga, str2special(&rhs, FALSE));
12040 
12041 	ga_append(&ga, NUL);
12042 	rettv->vval.v_string = (char_u *)ga.ga_data;
12043     }
12044 }
12045 
12046 /*
12047  * "map()" function
12048  */
12049     static void
12050 f_map(argvars, rettv)
12051     typval_T	*argvars;
12052     typval_T	*rettv;
12053 {
12054     filter_map(argvars, rettv, TRUE);
12055 }
12056 
12057 /*
12058  * "maparg()" function
12059  */
12060     static void
12061 f_maparg(argvars, rettv)
12062     typval_T	*argvars;
12063     typval_T	*rettv;
12064 {
12065     get_maparg(argvars, rettv, TRUE);
12066 }
12067 
12068 /*
12069  * "mapcheck()" function
12070  */
12071     static void
12072 f_mapcheck(argvars, rettv)
12073     typval_T	*argvars;
12074     typval_T	*rettv;
12075 {
12076     get_maparg(argvars, rettv, FALSE);
12077 }
12078 
12079 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
12080 
12081     static void
12082 find_some_match(argvars, rettv, type)
12083     typval_T	*argvars;
12084     typval_T	*rettv;
12085     int		type;
12086 {
12087     char_u	*str = NULL;
12088     char_u	*expr = NULL;
12089     char_u	*pat;
12090     regmatch_T	regmatch;
12091     char_u	patbuf[NUMBUFLEN];
12092     char_u	strbuf[NUMBUFLEN];
12093     char_u	*save_cpo;
12094     long	start = 0;
12095     long	nth = 1;
12096     colnr_T	startcol = 0;
12097     int		match = 0;
12098     list_T	*l = NULL;
12099     listitem_T	*li = NULL;
12100     long	idx = 0;
12101     char_u	*tofree = NULL;
12102 
12103     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
12104     save_cpo = p_cpo;
12105     p_cpo = (char_u *)"";
12106 
12107     rettv->vval.v_number = -1;
12108     if (type == 3)
12109     {
12110 	/* return empty list when there are no matches */
12111 	if (rettv_list_alloc(rettv) == FAIL)
12112 	    goto theend;
12113     }
12114     else if (type == 2)
12115     {
12116 	rettv->v_type = VAR_STRING;
12117 	rettv->vval.v_string = NULL;
12118     }
12119 
12120     if (argvars[0].v_type == VAR_LIST)
12121     {
12122 	if ((l = argvars[0].vval.v_list) == NULL)
12123 	    goto theend;
12124 	li = l->lv_first;
12125     }
12126     else
12127 	expr = str = get_tv_string(&argvars[0]);
12128 
12129     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
12130     if (pat == NULL)
12131 	goto theend;
12132 
12133     if (argvars[2].v_type != VAR_UNKNOWN)
12134     {
12135 	int	    error = FALSE;
12136 
12137 	start = get_tv_number_chk(&argvars[2], &error);
12138 	if (error)
12139 	    goto theend;
12140 	if (l != NULL)
12141 	{
12142 	    li = list_find(l, start);
12143 	    if (li == NULL)
12144 		goto theend;
12145 	    idx = l->lv_idx;	/* use the cached index */
12146 	}
12147 	else
12148 	{
12149 	    if (start < 0)
12150 		start = 0;
12151 	    if (start > (long)STRLEN(str))
12152 		goto theend;
12153 	    /* When "count" argument is there ignore matches before "start",
12154 	     * otherwise skip part of the string.  Differs when pattern is "^"
12155 	     * or "\<". */
12156 	    if (argvars[3].v_type != VAR_UNKNOWN)
12157 		startcol = start;
12158 	    else
12159 		str += start;
12160 	}
12161 
12162 	if (argvars[3].v_type != VAR_UNKNOWN)
12163 	    nth = get_tv_number_chk(&argvars[3], &error);
12164 	if (error)
12165 	    goto theend;
12166     }
12167 
12168     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
12169     if (regmatch.regprog != NULL)
12170     {
12171 	regmatch.rm_ic = p_ic;
12172 
12173 	for (;;)
12174 	{
12175 	    if (l != NULL)
12176 	    {
12177 		if (li == NULL)
12178 		{
12179 		    match = FALSE;
12180 		    break;
12181 		}
12182 		vim_free(tofree);
12183 		str = echo_string(&li->li_tv, &tofree, strbuf, 0);
12184 		if (str == NULL)
12185 		    break;
12186 	    }
12187 
12188 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)startcol);
12189 
12190 	    if (match && --nth <= 0)
12191 		break;
12192 	    if (l == NULL && !match)
12193 		break;
12194 
12195 	    /* Advance to just after the match. */
12196 	    if (l != NULL)
12197 	    {
12198 		li = li->li_next;
12199 		++idx;
12200 	    }
12201 	    else
12202 	    {
12203 #ifdef FEAT_MBYTE
12204 		startcol = (colnr_T)(regmatch.startp[0]
12205 				    + (*mb_ptr2len)(regmatch.startp[0]) - str);
12206 #else
12207 		startcol = regmatch.startp[0] + 1 - str;
12208 #endif
12209 	    }
12210 	}
12211 
12212 	if (match)
12213 	{
12214 	    if (type == 3)
12215 	    {
12216 		int i;
12217 
12218 		/* return list with matched string and submatches */
12219 		for (i = 0; i < NSUBEXP; ++i)
12220 		{
12221 		    if (regmatch.endp[i] == NULL)
12222 		    {
12223 			if (list_append_string(rettv->vval.v_list,
12224 						     (char_u *)"", 0) == FAIL)
12225 			    break;
12226 		    }
12227 		    else if (list_append_string(rettv->vval.v_list,
12228 				regmatch.startp[i],
12229 				(int)(regmatch.endp[i] - regmatch.startp[i]))
12230 			    == FAIL)
12231 			break;
12232 		}
12233 	    }
12234 	    else if (type == 2)
12235 	    {
12236 		/* return matched string */
12237 		if (l != NULL)
12238 		    copy_tv(&li->li_tv, rettv);
12239 		else
12240 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
12241 				(int)(regmatch.endp[0] - regmatch.startp[0]));
12242 	    }
12243 	    else if (l != NULL)
12244 		rettv->vval.v_number = idx;
12245 	    else
12246 	    {
12247 		if (type != 0)
12248 		    rettv->vval.v_number =
12249 				      (varnumber_T)(regmatch.startp[0] - str);
12250 		else
12251 		    rettv->vval.v_number =
12252 					(varnumber_T)(regmatch.endp[0] - str);
12253 		rettv->vval.v_number += (varnumber_T)(str - expr);
12254 	    }
12255 	}
12256 	vim_free(regmatch.regprog);
12257     }
12258 
12259 theend:
12260     vim_free(tofree);
12261     p_cpo = save_cpo;
12262 }
12263 
12264 /*
12265  * "match()" function
12266  */
12267     static void
12268 f_match(argvars, rettv)
12269     typval_T	*argvars;
12270     typval_T	*rettv;
12271 {
12272     find_some_match(argvars, rettv, 1);
12273 }
12274 
12275 /*
12276  * "matcharg()" function
12277  */
12278     static void
12279 f_matcharg(argvars, rettv)
12280     typval_T	*argvars;
12281     typval_T	*rettv;
12282 {
12283     if (rettv_list_alloc(rettv) == OK)
12284     {
12285 #ifdef FEAT_SEARCH_EXTRA
12286 	int	mi = get_tv_number(&argvars[0]);
12287 
12288 	if (mi >= 1 && mi <= 3)
12289 	{
12290 	    list_append_string(rettv->vval.v_list,
12291 				 syn_id2name(curwin->w_match_id[mi - 1]), -1);
12292 	    list_append_string(rettv->vval.v_list,
12293 					     curwin->w_match_pat[mi - 1], -1);
12294 	}
12295 #endif
12296     }
12297 }
12298 
12299 /*
12300  * "matchend()" function
12301  */
12302     static void
12303 f_matchend(argvars, rettv)
12304     typval_T	*argvars;
12305     typval_T	*rettv;
12306 {
12307     find_some_match(argvars, rettv, 0);
12308 }
12309 
12310 /*
12311  * "matchlist()" function
12312  */
12313     static void
12314 f_matchlist(argvars, rettv)
12315     typval_T	*argvars;
12316     typval_T	*rettv;
12317 {
12318     find_some_match(argvars, rettv, 3);
12319 }
12320 
12321 /*
12322  * "matchstr()" function
12323  */
12324     static void
12325 f_matchstr(argvars, rettv)
12326     typval_T	*argvars;
12327     typval_T	*rettv;
12328 {
12329     find_some_match(argvars, rettv, 2);
12330 }
12331 
12332 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
12333 
12334     static void
12335 max_min(argvars, rettv, domax)
12336     typval_T	*argvars;
12337     typval_T	*rettv;
12338     int		domax;
12339 {
12340     long	n = 0;
12341     long	i;
12342     int		error = FALSE;
12343 
12344     if (argvars[0].v_type == VAR_LIST)
12345     {
12346 	list_T		*l;
12347 	listitem_T	*li;
12348 
12349 	l = argvars[0].vval.v_list;
12350 	if (l != NULL)
12351 	{
12352 	    li = l->lv_first;
12353 	    if (li != NULL)
12354 	    {
12355 		n = get_tv_number_chk(&li->li_tv, &error);
12356 		for (;;)
12357 		{
12358 		    li = li->li_next;
12359 		    if (li == NULL)
12360 			break;
12361 		    i = get_tv_number_chk(&li->li_tv, &error);
12362 		    if (domax ? i > n : i < n)
12363 			n = i;
12364 		}
12365 	    }
12366 	}
12367     }
12368     else if (argvars[0].v_type == VAR_DICT)
12369     {
12370 	dict_T		*d;
12371 	int		first = TRUE;
12372 	hashitem_T	*hi;
12373 	int		todo;
12374 
12375 	d = argvars[0].vval.v_dict;
12376 	if (d != NULL)
12377 	{
12378 	    todo = (int)d->dv_hashtab.ht_used;
12379 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
12380 	    {
12381 		if (!HASHITEM_EMPTY(hi))
12382 		{
12383 		    --todo;
12384 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
12385 		    if (first)
12386 		    {
12387 			n = i;
12388 			first = FALSE;
12389 		    }
12390 		    else if (domax ? i > n : i < n)
12391 			n = i;
12392 		}
12393 	    }
12394 	}
12395     }
12396     else
12397 	EMSG(_(e_listdictarg));
12398     rettv->vval.v_number = error ? 0 : n;
12399 }
12400 
12401 /*
12402  * "max()" function
12403  */
12404     static void
12405 f_max(argvars, rettv)
12406     typval_T	*argvars;
12407     typval_T	*rettv;
12408 {
12409     max_min(argvars, rettv, TRUE);
12410 }
12411 
12412 /*
12413  * "min()" function
12414  */
12415     static void
12416 f_min(argvars, rettv)
12417     typval_T	*argvars;
12418     typval_T	*rettv;
12419 {
12420     max_min(argvars, rettv, FALSE);
12421 }
12422 
12423 static int mkdir_recurse __ARGS((char_u *dir, int prot));
12424 
12425 /*
12426  * Create the directory in which "dir" is located, and higher levels when
12427  * needed.
12428  */
12429     static int
12430 mkdir_recurse(dir, prot)
12431     char_u	*dir;
12432     int		prot;
12433 {
12434     char_u	*p;
12435     char_u	*updir;
12436     int		r = FAIL;
12437 
12438     /* Get end of directory name in "dir".
12439      * We're done when it's "/" or "c:/". */
12440     p = gettail_sep(dir);
12441     if (p <= get_past_head(dir))
12442 	return OK;
12443 
12444     /* If the directory exists we're done.  Otherwise: create it.*/
12445     updir = vim_strnsave(dir, (int)(p - dir));
12446     if (updir == NULL)
12447 	return FAIL;
12448     if (mch_isdir(updir))
12449 	r = OK;
12450     else if (mkdir_recurse(updir, prot) == OK)
12451 	r = vim_mkdir_emsg(updir, prot);
12452     vim_free(updir);
12453     return r;
12454 }
12455 
12456 #ifdef vim_mkdir
12457 /*
12458  * "mkdir()" function
12459  */
12460     static void
12461 f_mkdir(argvars, rettv)
12462     typval_T	*argvars;
12463     typval_T	*rettv;
12464 {
12465     char_u	*dir;
12466     char_u	buf[NUMBUFLEN];
12467     int		prot = 0755;
12468 
12469     rettv->vval.v_number = FAIL;
12470     if (check_restricted() || check_secure())
12471 	return;
12472 
12473     dir = get_tv_string_buf(&argvars[0], buf);
12474     if (argvars[1].v_type != VAR_UNKNOWN)
12475     {
12476 	if (argvars[2].v_type != VAR_UNKNOWN)
12477 	    prot = get_tv_number_chk(&argvars[2], NULL);
12478 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
12479 	    mkdir_recurse(dir, prot);
12480     }
12481     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
12482 }
12483 #endif
12484 
12485 /*
12486  * "mode()" function
12487  */
12488 /*ARGSUSED*/
12489     static void
12490 f_mode(argvars, rettv)
12491     typval_T	*argvars;
12492     typval_T	*rettv;
12493 {
12494     char_u	buf[2];
12495 
12496 #ifdef FEAT_VISUAL
12497     if (VIsual_active)
12498     {
12499 	if (VIsual_select)
12500 	    buf[0] = VIsual_mode + 's' - 'v';
12501 	else
12502 	    buf[0] = VIsual_mode;
12503     }
12504     else
12505 #endif
12506 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
12507 	buf[0] = 'r';
12508     else if (State & INSERT)
12509     {
12510 	if (State & REPLACE_FLAG)
12511 	    buf[0] = 'R';
12512 	else
12513 	    buf[0] = 'i';
12514     }
12515     else if (State & CMDLINE)
12516 	buf[0] = 'c';
12517     else
12518 	buf[0] = 'n';
12519 
12520     buf[1] = NUL;
12521     rettv->vval.v_string = vim_strsave(buf);
12522     rettv->v_type = VAR_STRING;
12523 }
12524 
12525 /*
12526  * "nextnonblank()" function
12527  */
12528     static void
12529 f_nextnonblank(argvars, rettv)
12530     typval_T	*argvars;
12531     typval_T	*rettv;
12532 {
12533     linenr_T	lnum;
12534 
12535     for (lnum = get_tv_lnum(argvars); ; ++lnum)
12536     {
12537 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
12538 	{
12539 	    lnum = 0;
12540 	    break;
12541 	}
12542 	if (*skipwhite(ml_get(lnum)) != NUL)
12543 	    break;
12544     }
12545     rettv->vval.v_number = lnum;
12546 }
12547 
12548 /*
12549  * "nr2char()" function
12550  */
12551     static void
12552 f_nr2char(argvars, rettv)
12553     typval_T	*argvars;
12554     typval_T	*rettv;
12555 {
12556     char_u	buf[NUMBUFLEN];
12557 
12558 #ifdef FEAT_MBYTE
12559     if (has_mbyte)
12560 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
12561     else
12562 #endif
12563     {
12564 	buf[0] = (char_u)get_tv_number(&argvars[0]);
12565 	buf[1] = NUL;
12566     }
12567     rettv->v_type = VAR_STRING;
12568     rettv->vval.v_string = vim_strsave(buf);
12569 }
12570 
12571 /*
12572  * "pathshorten()" function
12573  */
12574     static void
12575 f_pathshorten(argvars, rettv)
12576     typval_T	*argvars;
12577     typval_T	*rettv;
12578 {
12579     char_u	*p;
12580 
12581     rettv->v_type = VAR_STRING;
12582     p = get_tv_string_chk(&argvars[0]);
12583     if (p == NULL)
12584 	rettv->vval.v_string = NULL;
12585     else
12586     {
12587 	p = vim_strsave(p);
12588 	rettv->vval.v_string = p;
12589 	if (p != NULL)
12590 	    shorten_dir(p);
12591     }
12592 }
12593 
12594 /*
12595  * "prevnonblank()" function
12596  */
12597     static void
12598 f_prevnonblank(argvars, rettv)
12599     typval_T	*argvars;
12600     typval_T	*rettv;
12601 {
12602     linenr_T	lnum;
12603 
12604     lnum = get_tv_lnum(argvars);
12605     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
12606 	lnum = 0;
12607     else
12608 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
12609 	    --lnum;
12610     rettv->vval.v_number = lnum;
12611 }
12612 
12613 #ifdef HAVE_STDARG_H
12614 /* This dummy va_list is here because:
12615  * - passing a NULL pointer doesn't work when va_list isn't a pointer
12616  * - locally in the function results in a "used before set" warning
12617  * - using va_start() to initialize it gives "function with fixed args" error */
12618 static va_list	ap;
12619 #endif
12620 
12621 /*
12622  * "printf()" function
12623  */
12624     static void
12625 f_printf(argvars, rettv)
12626     typval_T	*argvars;
12627     typval_T	*rettv;
12628 {
12629     rettv->v_type = VAR_STRING;
12630     rettv->vval.v_string = NULL;
12631 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
12632     {
12633 	char_u	buf[NUMBUFLEN];
12634 	int	len;
12635 	char_u	*s;
12636 	int	saved_did_emsg = did_emsg;
12637 	char	*fmt;
12638 
12639 	/* Get the required length, allocate the buffer and do it for real. */
12640 	did_emsg = FALSE;
12641 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
12642 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
12643 	if (!did_emsg)
12644 	{
12645 	    s = alloc(len + 1);
12646 	    if (s != NULL)
12647 	    {
12648 		rettv->vval.v_string = s;
12649 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
12650 	    }
12651 	}
12652 	did_emsg |= saved_did_emsg;
12653     }
12654 #endif
12655 }
12656 
12657 /*
12658  * "pumvisible()" function
12659  */
12660 /*ARGSUSED*/
12661     static void
12662 f_pumvisible(argvars, rettv)
12663     typval_T	*argvars;
12664     typval_T	*rettv;
12665 {
12666     rettv->vval.v_number = 0;
12667 #ifdef FEAT_INS_EXPAND
12668     if (pum_visible())
12669 	rettv->vval.v_number = 1;
12670 #endif
12671 }
12672 
12673 /*
12674  * "range()" function
12675  */
12676     static void
12677 f_range(argvars, rettv)
12678     typval_T	*argvars;
12679     typval_T	*rettv;
12680 {
12681     long	start;
12682     long	end;
12683     long	stride = 1;
12684     long	i;
12685     int		error = FALSE;
12686 
12687     start = get_tv_number_chk(&argvars[0], &error);
12688     if (argvars[1].v_type == VAR_UNKNOWN)
12689     {
12690 	end = start - 1;
12691 	start = 0;
12692     }
12693     else
12694     {
12695 	end = get_tv_number_chk(&argvars[1], &error);
12696 	if (argvars[2].v_type != VAR_UNKNOWN)
12697 	    stride = get_tv_number_chk(&argvars[2], &error);
12698     }
12699 
12700     rettv->vval.v_number = 0;
12701     if (error)
12702 	return;		/* type error; errmsg already given */
12703     if (stride == 0)
12704 	EMSG(_("E726: Stride is zero"));
12705     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12706 	EMSG(_("E727: Start past end"));
12707     else
12708     {
12709 	if (rettv_list_alloc(rettv) == OK)
12710 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12711 		if (list_append_number(rettv->vval.v_list,
12712 						      (varnumber_T)i) == FAIL)
12713 		    break;
12714     }
12715 }
12716 
12717 /*
12718  * "readfile()" function
12719  */
12720     static void
12721 f_readfile(argvars, rettv)
12722     typval_T	*argvars;
12723     typval_T	*rettv;
12724 {
12725     int		binary = FALSE;
12726     char_u	*fname;
12727     FILE	*fd;
12728     listitem_T	*li;
12729 #define FREAD_SIZE 200	    /* optimized for text lines */
12730     char_u	buf[FREAD_SIZE];
12731     int		readlen;    /* size of last fread() */
12732     int		buflen;	    /* nr of valid chars in buf[] */
12733     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12734     int		tolist;	    /* first byte in buf[] still to be put in list */
12735     int		chop;	    /* how many CR to chop off */
12736     char_u	*prev = NULL;	/* previously read bytes, if any */
12737     int		prevlen = 0;    /* length of "prev" if not NULL */
12738     char_u	*s;
12739     int		len;
12740     long	maxline = MAXLNUM;
12741     long	cnt = 0;
12742 
12743     if (argvars[1].v_type != VAR_UNKNOWN)
12744     {
12745 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12746 	    binary = TRUE;
12747 	if (argvars[2].v_type != VAR_UNKNOWN)
12748 	    maxline = get_tv_number(&argvars[2]);
12749     }
12750 
12751     if (rettv_list_alloc(rettv) == FAIL)
12752 	return;
12753 
12754     /* Always open the file in binary mode, library functions have a mind of
12755      * their own about CR-LF conversion. */
12756     fname = get_tv_string(&argvars[0]);
12757     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12758     {
12759 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12760 	return;
12761     }
12762 
12763     filtd = 0;
12764     while (cnt < maxline || maxline < 0)
12765     {
12766 	readlen = (int)fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12767 	buflen = filtd + readlen;
12768 	tolist = 0;
12769 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12770 	{
12771 	    if (buf[filtd] == '\n' || readlen <= 0)
12772 	    {
12773 		/* Only when in binary mode add an empty list item when the
12774 		 * last line ends in a '\n'. */
12775 		if (!binary && readlen == 0 && filtd == 0)
12776 		    break;
12777 
12778 		/* Found end-of-line or end-of-file: add a text line to the
12779 		 * list. */
12780 		chop = 0;
12781 		if (!binary)
12782 		    while (filtd - chop - 1 >= tolist
12783 					  && buf[filtd - chop - 1] == '\r')
12784 			++chop;
12785 		len = filtd - tolist - chop;
12786 		if (prev == NULL)
12787 		    s = vim_strnsave(buf + tolist, len);
12788 		else
12789 		{
12790 		    s = alloc((unsigned)(prevlen + len + 1));
12791 		    if (s != NULL)
12792 		    {
12793 			mch_memmove(s, prev, prevlen);
12794 			vim_free(prev);
12795 			prev = NULL;
12796 			mch_memmove(s + prevlen, buf + tolist, len);
12797 			s[prevlen + len] = NUL;
12798 		    }
12799 		}
12800 		tolist = filtd + 1;
12801 
12802 		li = listitem_alloc();
12803 		if (li == NULL)
12804 		{
12805 		    vim_free(s);
12806 		    break;
12807 		}
12808 		li->li_tv.v_type = VAR_STRING;
12809 		li->li_tv.v_lock = 0;
12810 		li->li_tv.vval.v_string = s;
12811 		list_append(rettv->vval.v_list, li);
12812 
12813 		if (++cnt >= maxline && maxline >= 0)
12814 		    break;
12815 		if (readlen <= 0)
12816 		    break;
12817 	    }
12818 	    else if (buf[filtd] == NUL)
12819 		buf[filtd] = '\n';
12820 	}
12821 	if (readlen <= 0)
12822 	    break;
12823 
12824 	if (tolist == 0)
12825 	{
12826 	    /* "buf" is full, need to move text to an allocated buffer */
12827 	    if (prev == NULL)
12828 	    {
12829 		prev = vim_strnsave(buf, buflen);
12830 		prevlen = buflen;
12831 	    }
12832 	    else
12833 	    {
12834 		s = alloc((unsigned)(prevlen + buflen));
12835 		if (s != NULL)
12836 		{
12837 		    mch_memmove(s, prev, prevlen);
12838 		    mch_memmove(s + prevlen, buf, buflen);
12839 		    vim_free(prev);
12840 		    prev = s;
12841 		    prevlen += buflen;
12842 		}
12843 	    }
12844 	    filtd = 0;
12845 	}
12846 	else
12847 	{
12848 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12849 	    filtd -= tolist;
12850 	}
12851     }
12852 
12853     /*
12854      * For a negative line count use only the lines at the end of the file,
12855      * free the rest.
12856      */
12857     if (maxline < 0)
12858 	while (cnt > -maxline)
12859 	{
12860 	    listitem_remove(rettv->vval.v_list, rettv->vval.v_list->lv_first);
12861 	    --cnt;
12862 	}
12863 
12864     vim_free(prev);
12865     fclose(fd);
12866 }
12867 
12868 #if defined(FEAT_RELTIME)
12869 static int list2proftime __ARGS((typval_T *arg, proftime_T *tm));
12870 
12871 /*
12872  * Convert a List to proftime_T.
12873  * Return FAIL when there is something wrong.
12874  */
12875     static int
12876 list2proftime(arg, tm)
12877     typval_T	*arg;
12878     proftime_T  *tm;
12879 {
12880     long	n1, n2;
12881     int	error = FALSE;
12882 
12883     if (arg->v_type != VAR_LIST || arg->vval.v_list == NULL
12884 					     || arg->vval.v_list->lv_len != 2)
12885 	return FAIL;
12886     n1 = list_find_nr(arg->vval.v_list, 0L, &error);
12887     n2 = list_find_nr(arg->vval.v_list, 1L, &error);
12888 # ifdef WIN3264
12889     tm->HighPart = n1;
12890     tm->LowPart = n2;
12891 # else
12892     tm->tv_sec = n1;
12893     tm->tv_usec = n2;
12894 # endif
12895     return error ? FAIL : OK;
12896 }
12897 #endif /* FEAT_RELTIME */
12898 
12899 /*
12900  * "reltime()" function
12901  */
12902     static void
12903 f_reltime(argvars, rettv)
12904     typval_T	*argvars;
12905     typval_T	*rettv;
12906 {
12907 #ifdef FEAT_RELTIME
12908     proftime_T	res;
12909     proftime_T	start;
12910 
12911     if (argvars[0].v_type == VAR_UNKNOWN)
12912     {
12913 	/* No arguments: get current time. */
12914 	profile_start(&res);
12915     }
12916     else if (argvars[1].v_type == VAR_UNKNOWN)
12917     {
12918 	if (list2proftime(&argvars[0], &res) == FAIL)
12919 	    return;
12920 	profile_end(&res);
12921     }
12922     else
12923     {
12924 	/* Two arguments: compute the difference. */
12925 	if (list2proftime(&argvars[0], &start) == FAIL
12926 		|| list2proftime(&argvars[1], &res) == FAIL)
12927 	    return;
12928 	profile_sub(&res, &start);
12929     }
12930 
12931     if (rettv_list_alloc(rettv) == OK)
12932     {
12933 	long	n1, n2;
12934 
12935 # ifdef WIN3264
12936 	n1 = res.HighPart;
12937 	n2 = res.LowPart;
12938 # else
12939 	n1 = res.tv_sec;
12940 	n2 = res.tv_usec;
12941 # endif
12942 	list_append_number(rettv->vval.v_list, (varnumber_T)n1);
12943 	list_append_number(rettv->vval.v_list, (varnumber_T)n2);
12944     }
12945 #endif
12946 }
12947 
12948 /*
12949  * "reltimestr()" function
12950  */
12951     static void
12952 f_reltimestr(argvars, rettv)
12953     typval_T	*argvars;
12954     typval_T	*rettv;
12955 {
12956 #ifdef FEAT_RELTIME
12957     proftime_T	tm;
12958 #endif
12959 
12960     rettv->v_type = VAR_STRING;
12961     rettv->vval.v_string = NULL;
12962 #ifdef FEAT_RELTIME
12963     if (list2proftime(&argvars[0], &tm) == OK)
12964 	rettv->vval.v_string = vim_strsave((char_u *)profile_msg(&tm));
12965 #endif
12966 }
12967 
12968 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12969 static void make_connection __ARGS((void));
12970 static int check_connection __ARGS((void));
12971 
12972     static void
12973 make_connection()
12974 {
12975     if (X_DISPLAY == NULL
12976 # ifdef FEAT_GUI
12977 	    && !gui.in_use
12978 # endif
12979 	    )
12980     {
12981 	x_force_connect = TRUE;
12982 	setup_term_clip();
12983 	x_force_connect = FALSE;
12984     }
12985 }
12986 
12987     static int
12988 check_connection()
12989 {
12990     make_connection();
12991     if (X_DISPLAY == NULL)
12992     {
12993 	EMSG(_("E240: No connection to Vim server"));
12994 	return FAIL;
12995     }
12996     return OK;
12997 }
12998 #endif
12999 
13000 #ifdef FEAT_CLIENTSERVER
13001 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
13002 
13003     static void
13004 remote_common(argvars, rettv, expr)
13005     typval_T	*argvars;
13006     typval_T	*rettv;
13007     int		expr;
13008 {
13009     char_u	*server_name;
13010     char_u	*keys;
13011     char_u	*r = NULL;
13012     char_u	buf[NUMBUFLEN];
13013 # ifdef WIN32
13014     HWND	w;
13015 # else
13016     Window	w;
13017 # endif
13018 
13019     if (check_restricted() || check_secure())
13020 	return;
13021 
13022 # ifdef FEAT_X11
13023     if (check_connection() == FAIL)
13024 	return;
13025 # endif
13026 
13027     server_name = get_tv_string_chk(&argvars[0]);
13028     if (server_name == NULL)
13029 	return;		/* type error; errmsg already given */
13030     keys = get_tv_string_buf(&argvars[1], buf);
13031 # ifdef WIN32
13032     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
13033 # else
13034     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
13035 									  < 0)
13036 # endif
13037     {
13038 	if (r != NULL)
13039 	    EMSG(r);		/* sending worked but evaluation failed */
13040 	else
13041 	    EMSG2(_("E241: Unable to send to %s"), server_name);
13042 	return;
13043     }
13044 
13045     rettv->vval.v_string = r;
13046 
13047     if (argvars[2].v_type != VAR_UNKNOWN)
13048     {
13049 	dictitem_T	v;
13050 	char_u		str[30];
13051 	char_u		*idvar;
13052 
13053 	sprintf((char *)str, PRINTF_HEX_LONG_U, (long_u)w);
13054 	v.di_tv.v_type = VAR_STRING;
13055 	v.di_tv.vval.v_string = vim_strsave(str);
13056 	idvar = get_tv_string_chk(&argvars[2]);
13057 	if (idvar != NULL)
13058 	    set_var(idvar, &v.di_tv, FALSE);
13059 	vim_free(v.di_tv.vval.v_string);
13060     }
13061 }
13062 #endif
13063 
13064 /*
13065  * "remote_expr()" function
13066  */
13067 /*ARGSUSED*/
13068     static void
13069 f_remote_expr(argvars, rettv)
13070     typval_T	*argvars;
13071     typval_T	*rettv;
13072 {
13073     rettv->v_type = VAR_STRING;
13074     rettv->vval.v_string = NULL;
13075 #ifdef FEAT_CLIENTSERVER
13076     remote_common(argvars, rettv, TRUE);
13077 #endif
13078 }
13079 
13080 /*
13081  * "remote_foreground()" function
13082  */
13083 /*ARGSUSED*/
13084     static void
13085 f_remote_foreground(argvars, rettv)
13086     typval_T	*argvars;
13087     typval_T	*rettv;
13088 {
13089     rettv->vval.v_number = 0;
13090 #ifdef FEAT_CLIENTSERVER
13091 # ifdef WIN32
13092     /* On Win32 it's done in this application. */
13093     {
13094 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
13095 
13096 	if (server_name != NULL)
13097 	    serverForeground(server_name);
13098     }
13099 # else
13100     /* Send a foreground() expression to the server. */
13101     argvars[1].v_type = VAR_STRING;
13102     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
13103     argvars[2].v_type = VAR_UNKNOWN;
13104     remote_common(argvars, rettv, TRUE);
13105     vim_free(argvars[1].vval.v_string);
13106 # endif
13107 #endif
13108 }
13109 
13110 /*ARGSUSED*/
13111     static void
13112 f_remote_peek(argvars, rettv)
13113     typval_T	*argvars;
13114     typval_T	*rettv;
13115 {
13116 #ifdef FEAT_CLIENTSERVER
13117     dictitem_T	v;
13118     char_u	*s = NULL;
13119 # ifdef WIN32
13120     long_u	n = 0;
13121 # endif
13122     char_u	*serverid;
13123 
13124     if (check_restricted() || check_secure())
13125     {
13126 	rettv->vval.v_number = -1;
13127 	return;
13128     }
13129     serverid = get_tv_string_chk(&argvars[0]);
13130     if (serverid == NULL)
13131     {
13132 	rettv->vval.v_number = -1;
13133 	return;		/* type error; errmsg already given */
13134     }
13135 # ifdef WIN32
13136     sscanf(serverid, SCANF_HEX_LONG_U, &n);
13137     if (n == 0)
13138 	rettv->vval.v_number = -1;
13139     else
13140     {
13141 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
13142 	rettv->vval.v_number = (s != NULL);
13143     }
13144 # else
13145     rettv->vval.v_number = 0;
13146     if (check_connection() == FAIL)
13147 	return;
13148 
13149     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
13150 						serverStrToWin(serverid), &s);
13151 # endif
13152 
13153     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
13154     {
13155 	char_u		*retvar;
13156 
13157 	v.di_tv.v_type = VAR_STRING;
13158 	v.di_tv.vval.v_string = vim_strsave(s);
13159 	retvar = get_tv_string_chk(&argvars[1]);
13160 	if (retvar != NULL)
13161 	    set_var(retvar, &v.di_tv, FALSE);
13162 	vim_free(v.di_tv.vval.v_string);
13163     }
13164 #else
13165     rettv->vval.v_number = -1;
13166 #endif
13167 }
13168 
13169 /*ARGSUSED*/
13170     static void
13171 f_remote_read(argvars, rettv)
13172     typval_T	*argvars;
13173     typval_T	*rettv;
13174 {
13175     char_u	*r = NULL;
13176 
13177 #ifdef FEAT_CLIENTSERVER
13178     char_u	*serverid = get_tv_string_chk(&argvars[0]);
13179 
13180     if (serverid != NULL && !check_restricted() && !check_secure())
13181     {
13182 # ifdef WIN32
13183 	/* The server's HWND is encoded in the 'id' parameter */
13184 	long_u		n = 0;
13185 
13186 	sscanf(serverid, SCANF_HEX_LONG_U, &n);
13187 	if (n != 0)
13188 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
13189 	if (r == NULL)
13190 # else
13191 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
13192 		serverStrToWin(serverid), &r, FALSE) < 0)
13193 # endif
13194 	    EMSG(_("E277: Unable to read a server reply"));
13195     }
13196 #endif
13197     rettv->v_type = VAR_STRING;
13198     rettv->vval.v_string = r;
13199 }
13200 
13201 /*
13202  * "remote_send()" function
13203  */
13204 /*ARGSUSED*/
13205     static void
13206 f_remote_send(argvars, rettv)
13207     typval_T	*argvars;
13208     typval_T	*rettv;
13209 {
13210     rettv->v_type = VAR_STRING;
13211     rettv->vval.v_string = NULL;
13212 #ifdef FEAT_CLIENTSERVER
13213     remote_common(argvars, rettv, FALSE);
13214 #endif
13215 }
13216 
13217 /*
13218  * "remove()" function
13219  */
13220     static void
13221 f_remove(argvars, rettv)
13222     typval_T	*argvars;
13223     typval_T	*rettv;
13224 {
13225     list_T	*l;
13226     listitem_T	*item, *item2;
13227     listitem_T	*li;
13228     long	idx;
13229     long	end;
13230     char_u	*key;
13231     dict_T	*d;
13232     dictitem_T	*di;
13233 
13234     rettv->vval.v_number = 0;
13235     if (argvars[0].v_type == VAR_DICT)
13236     {
13237 	if (argvars[2].v_type != VAR_UNKNOWN)
13238 	    EMSG2(_(e_toomanyarg), "remove()");
13239 	else if ((d = argvars[0].vval.v_dict) != NULL
13240 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
13241 	{
13242 	    key = get_tv_string_chk(&argvars[1]);
13243 	    if (key != NULL)
13244 	    {
13245 		di = dict_find(d, key, -1);
13246 		if (di == NULL)
13247 		    EMSG2(_(e_dictkey), key);
13248 		else
13249 		{
13250 		    *rettv = di->di_tv;
13251 		    init_tv(&di->di_tv);
13252 		    dictitem_remove(d, di);
13253 		}
13254 	    }
13255 	}
13256     }
13257     else if (argvars[0].v_type != VAR_LIST)
13258 	EMSG2(_(e_listdictarg), "remove()");
13259     else if ((l = argvars[0].vval.v_list) != NULL
13260 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
13261     {
13262 	int	    error = FALSE;
13263 
13264 	idx = get_tv_number_chk(&argvars[1], &error);
13265 	if (error)
13266 	    ;		/* type error: do nothing, errmsg already given */
13267 	else if ((item = list_find(l, idx)) == NULL)
13268 	    EMSGN(_(e_listidx), idx);
13269 	else
13270 	{
13271 	    if (argvars[2].v_type == VAR_UNKNOWN)
13272 	    {
13273 		/* Remove one item, return its value. */
13274 		list_remove(l, item, item);
13275 		*rettv = item->li_tv;
13276 		vim_free(item);
13277 	    }
13278 	    else
13279 	    {
13280 		/* Remove range of items, return list with values. */
13281 		end = get_tv_number_chk(&argvars[2], &error);
13282 		if (error)
13283 		    ;		/* type error: do nothing */
13284 		else if ((item2 = list_find(l, end)) == NULL)
13285 		    EMSGN(_(e_listidx), end);
13286 		else
13287 		{
13288 		    int	    cnt = 0;
13289 
13290 		    for (li = item; li != NULL; li = li->li_next)
13291 		    {
13292 			++cnt;
13293 			if (li == item2)
13294 			    break;
13295 		    }
13296 		    if (li == NULL)  /* didn't find "item2" after "item" */
13297 			EMSG(_(e_invrange));
13298 		    else
13299 		    {
13300 			list_remove(l, item, item2);
13301 			if (rettv_list_alloc(rettv) == OK)
13302 			{
13303 			    l = rettv->vval.v_list;
13304 			    l->lv_first = item;
13305 			    l->lv_last = item2;
13306 			    item->li_prev = NULL;
13307 			    item2->li_next = NULL;
13308 			    l->lv_len = cnt;
13309 			}
13310 		    }
13311 		}
13312 	    }
13313 	}
13314     }
13315 }
13316 
13317 /*
13318  * "rename({from}, {to})" function
13319  */
13320     static void
13321 f_rename(argvars, rettv)
13322     typval_T	*argvars;
13323     typval_T	*rettv;
13324 {
13325     char_u	buf[NUMBUFLEN];
13326 
13327     if (check_restricted() || check_secure())
13328 	rettv->vval.v_number = -1;
13329     else
13330 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
13331 				      get_tv_string_buf(&argvars[1], buf));
13332 }
13333 
13334 /*
13335  * "repeat()" function
13336  */
13337 /*ARGSUSED*/
13338     static void
13339 f_repeat(argvars, rettv)
13340     typval_T	*argvars;
13341     typval_T	*rettv;
13342 {
13343     char_u	*p;
13344     int		n;
13345     int		slen;
13346     int		len;
13347     char_u	*r;
13348     int		i;
13349 
13350     n = get_tv_number(&argvars[1]);
13351     if (argvars[0].v_type == VAR_LIST)
13352     {
13353 	if (rettv_list_alloc(rettv) == OK && argvars[0].vval.v_list != NULL)
13354 	    while (n-- > 0)
13355 		if (list_extend(rettv->vval.v_list,
13356 					argvars[0].vval.v_list, NULL) == FAIL)
13357 		    break;
13358     }
13359     else
13360     {
13361 	p = get_tv_string(&argvars[0]);
13362 	rettv->v_type = VAR_STRING;
13363 	rettv->vval.v_string = NULL;
13364 
13365 	slen = (int)STRLEN(p);
13366 	len = slen * n;
13367 	if (len <= 0)
13368 	    return;
13369 
13370 	r = alloc(len + 1);
13371 	if (r != NULL)
13372 	{
13373 	    for (i = 0; i < n; i++)
13374 		mch_memmove(r + i * slen, p, (size_t)slen);
13375 	    r[len] = NUL;
13376 	}
13377 
13378 	rettv->vval.v_string = r;
13379     }
13380 }
13381 
13382 /*
13383  * "resolve()" function
13384  */
13385     static void
13386 f_resolve(argvars, rettv)
13387     typval_T	*argvars;
13388     typval_T	*rettv;
13389 {
13390     char_u	*p;
13391 
13392     p = get_tv_string(&argvars[0]);
13393 #ifdef FEAT_SHORTCUT
13394     {
13395 	char_u	*v = NULL;
13396 
13397 	v = mch_resolve_shortcut(p);
13398 	if (v != NULL)
13399 	    rettv->vval.v_string = v;
13400 	else
13401 	    rettv->vval.v_string = vim_strsave(p);
13402     }
13403 #else
13404 # ifdef HAVE_READLINK
13405     {
13406 	char_u	buf[MAXPATHL + 1];
13407 	char_u	*cpy;
13408 	int	len;
13409 	char_u	*remain = NULL;
13410 	char_u	*q;
13411 	int	is_relative_to_current = FALSE;
13412 	int	has_trailing_pathsep = FALSE;
13413 	int	limit = 100;
13414 
13415 	p = vim_strsave(p);
13416 
13417 	if (p[0] == '.' && (vim_ispathsep(p[1])
13418 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
13419 	    is_relative_to_current = TRUE;
13420 
13421 	len = STRLEN(p);
13422 	if (len > 0 && after_pathsep(p, p + len))
13423 	    has_trailing_pathsep = TRUE;
13424 
13425 	q = getnextcomp(p);
13426 	if (*q != NUL)
13427 	{
13428 	    /* Separate the first path component in "p", and keep the
13429 	     * remainder (beginning with the path separator). */
13430 	    remain = vim_strsave(q - 1);
13431 	    q[-1] = NUL;
13432 	}
13433 
13434 	for (;;)
13435 	{
13436 	    for (;;)
13437 	    {
13438 		len = readlink((char *)p, (char *)buf, MAXPATHL);
13439 		if (len <= 0)
13440 		    break;
13441 		buf[len] = NUL;
13442 
13443 		if (limit-- == 0)
13444 		{
13445 		    vim_free(p);
13446 		    vim_free(remain);
13447 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
13448 		    rettv->vval.v_string = NULL;
13449 		    goto fail;
13450 		}
13451 
13452 		/* Ensure that the result will have a trailing path separator
13453 		 * if the argument has one. */
13454 		if (remain == NULL && has_trailing_pathsep)
13455 		    add_pathsep(buf);
13456 
13457 		/* Separate the first path component in the link value and
13458 		 * concatenate the remainders. */
13459 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
13460 		if (*q != NUL)
13461 		{
13462 		    if (remain == NULL)
13463 			remain = vim_strsave(q - 1);
13464 		    else
13465 		    {
13466 			cpy = concat_str(q - 1, remain);
13467 			if (cpy != NULL)
13468 			{
13469 			    vim_free(remain);
13470 			    remain = cpy;
13471 			}
13472 		    }
13473 		    q[-1] = NUL;
13474 		}
13475 
13476 		q = gettail(p);
13477 		if (q > p && *q == NUL)
13478 		{
13479 		    /* Ignore trailing path separator. */
13480 		    q[-1] = NUL;
13481 		    q = gettail(p);
13482 		}
13483 		if (q > p && !mch_isFullName(buf))
13484 		{
13485 		    /* symlink is relative to directory of argument */
13486 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
13487 		    if (cpy != NULL)
13488 		    {
13489 			STRCPY(cpy, p);
13490 			STRCPY(gettail(cpy), buf);
13491 			vim_free(p);
13492 			p = cpy;
13493 		    }
13494 		}
13495 		else
13496 		{
13497 		    vim_free(p);
13498 		    p = vim_strsave(buf);
13499 		}
13500 	    }
13501 
13502 	    if (remain == NULL)
13503 		break;
13504 
13505 	    /* Append the first path component of "remain" to "p". */
13506 	    q = getnextcomp(remain + 1);
13507 	    len = q - remain - (*q != NUL);
13508 	    cpy = vim_strnsave(p, STRLEN(p) + len);
13509 	    if (cpy != NULL)
13510 	    {
13511 		STRNCAT(cpy, remain, len);
13512 		vim_free(p);
13513 		p = cpy;
13514 	    }
13515 	    /* Shorten "remain". */
13516 	    if (*q != NUL)
13517 		STRCPY(remain, q - 1);
13518 	    else
13519 	    {
13520 		vim_free(remain);
13521 		remain = NULL;
13522 	    }
13523 	}
13524 
13525 	/* If the result is a relative path name, make it explicitly relative to
13526 	 * the current directory if and only if the argument had this form. */
13527 	if (!vim_ispathsep(*p))
13528 	{
13529 	    if (is_relative_to_current
13530 		    && *p != NUL
13531 		    && !(p[0] == '.'
13532 			&& (p[1] == NUL
13533 			    || vim_ispathsep(p[1])
13534 			    || (p[1] == '.'
13535 				&& (p[2] == NUL
13536 				    || vim_ispathsep(p[2]))))))
13537 	    {
13538 		/* Prepend "./". */
13539 		cpy = concat_str((char_u *)"./", p);
13540 		if (cpy != NULL)
13541 		{
13542 		    vim_free(p);
13543 		    p = cpy;
13544 		}
13545 	    }
13546 	    else if (!is_relative_to_current)
13547 	    {
13548 		/* Strip leading "./". */
13549 		q = p;
13550 		while (q[0] == '.' && vim_ispathsep(q[1]))
13551 		    q += 2;
13552 		if (q > p)
13553 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
13554 	    }
13555 	}
13556 
13557 	/* Ensure that the result will have no trailing path separator
13558 	 * if the argument had none.  But keep "/" or "//". */
13559 	if (!has_trailing_pathsep)
13560 	{
13561 	    q = p + STRLEN(p);
13562 	    if (after_pathsep(p, q))
13563 		*gettail_sep(p) = NUL;
13564 	}
13565 
13566 	rettv->vval.v_string = p;
13567     }
13568 # else
13569     rettv->vval.v_string = vim_strsave(p);
13570 # endif
13571 #endif
13572 
13573     simplify_filename(rettv->vval.v_string);
13574 
13575 #ifdef HAVE_READLINK
13576 fail:
13577 #endif
13578     rettv->v_type = VAR_STRING;
13579 }
13580 
13581 /*
13582  * "reverse({list})" function
13583  */
13584     static void
13585 f_reverse(argvars, rettv)
13586     typval_T	*argvars;
13587     typval_T	*rettv;
13588 {
13589     list_T	*l;
13590     listitem_T	*li, *ni;
13591 
13592     rettv->vval.v_number = 0;
13593     if (argvars[0].v_type != VAR_LIST)
13594 	EMSG2(_(e_listarg), "reverse()");
13595     else if ((l = argvars[0].vval.v_list) != NULL
13596 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
13597     {
13598 	li = l->lv_last;
13599 	l->lv_first = l->lv_last = NULL;
13600 	l->lv_len = 0;
13601 	while (li != NULL)
13602 	{
13603 	    ni = li->li_prev;
13604 	    list_append(l, li);
13605 	    li = ni;
13606 	}
13607 	rettv->vval.v_list = l;
13608 	rettv->v_type = VAR_LIST;
13609 	++l->lv_refcount;
13610     }
13611 }
13612 
13613 #define SP_NOMOVE	0x01	    /* don't move cursor */
13614 #define SP_REPEAT	0x02	    /* repeat to find outer pair */
13615 #define SP_RETCOUNT	0x04	    /* return matchcount */
13616 #define SP_SETPCMARK	0x08	    /* set previous context mark */
13617 #define SP_START	0x10	    /* accept match at start position */
13618 #define SP_SUBPAT	0x20	    /* return nr of matching sub-pattern */
13619 #define SP_END		0x40	    /* leave cursor at end of match */
13620 
13621 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
13622 
13623 /*
13624  * Get flags for a search function.
13625  * Possibly sets "p_ws".
13626  * Returns BACKWARD, FORWARD or zero (for an error).
13627  */
13628     static int
13629 get_search_arg(varp, flagsp)
13630     typval_T	*varp;
13631     int		*flagsp;
13632 {
13633     int		dir = FORWARD;
13634     char_u	*flags;
13635     char_u	nbuf[NUMBUFLEN];
13636     int		mask;
13637 
13638     if (varp->v_type != VAR_UNKNOWN)
13639     {
13640 	flags = get_tv_string_buf_chk(varp, nbuf);
13641 	if (flags == NULL)
13642 	    return 0;		/* type error; errmsg already given */
13643 	while (*flags != NUL)
13644 	{
13645 	    switch (*flags)
13646 	    {
13647 		case 'b': dir = BACKWARD; break;
13648 		case 'w': p_ws = TRUE; break;
13649 		case 'W': p_ws = FALSE; break;
13650 		default:  mask = 0;
13651 			  if (flagsp != NULL)
13652 			     switch (*flags)
13653 			     {
13654 				 case 'c': mask = SP_START; break;
13655 				 case 'e': mask = SP_END; break;
13656 				 case 'm': mask = SP_RETCOUNT; break;
13657 				 case 'n': mask = SP_NOMOVE; break;
13658 				 case 'p': mask = SP_SUBPAT; break;
13659 				 case 'r': mask = SP_REPEAT; break;
13660 				 case 's': mask = SP_SETPCMARK; break;
13661 			     }
13662 			  if (mask == 0)
13663 			  {
13664 			      EMSG2(_(e_invarg2), flags);
13665 			      dir = 0;
13666 			  }
13667 			  else
13668 			      *flagsp |= mask;
13669 	    }
13670 	    if (dir == 0)
13671 		break;
13672 	    ++flags;
13673 	}
13674     }
13675     return dir;
13676 }
13677 
13678 /*
13679  * Shared by search() and searchpos() functions
13680  */
13681     static int
13682 search_cmn(argvars, match_pos, flagsp)
13683     typval_T	*argvars;
13684     pos_T	*match_pos;
13685     int		*flagsp;
13686 {
13687     int		flags;
13688     char_u	*pat;
13689     pos_T	pos;
13690     pos_T	save_cursor;
13691     int		save_p_ws = p_ws;
13692     int		dir;
13693     int		retval = 0;	/* default: FAIL */
13694     long	lnum_stop = 0;
13695     int		options = SEARCH_KEEP;
13696     int		subpatnum;
13697 
13698     pat = get_tv_string(&argvars[0]);
13699     dir = get_search_arg(&argvars[1], flagsp);	/* may set p_ws */
13700     if (dir == 0)
13701 	goto theend;
13702     flags = *flagsp;
13703     if (flags & SP_START)
13704 	options |= SEARCH_START;
13705     if (flags & SP_END)
13706 	options |= SEARCH_END;
13707 
13708     /* Optional extra argument: line number to stop searching. */
13709     if (argvars[1].v_type != VAR_UNKNOWN
13710 	    && argvars[2].v_type != VAR_UNKNOWN)
13711     {
13712 	lnum_stop = get_tv_number_chk(&argvars[2], NULL);
13713 	if (lnum_stop < 0)
13714 	    goto theend;
13715     }
13716 
13717     /*
13718      * This function does not accept SP_REPEAT and SP_RETCOUNT flags.
13719      * Check to make sure only those flags are set.
13720      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
13721      * flags cannot be set. Check for that condition also.
13722      */
13723     if (((flags & (SP_REPEAT | SP_RETCOUNT)) != 0)
13724 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13725     {
13726 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13727 	goto theend;
13728     }
13729 
13730     pos = save_cursor = curwin->w_cursor;
13731     subpatnum = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13732 				     options, RE_SEARCH, (linenr_T)lnum_stop);
13733     if (subpatnum != FAIL)
13734     {
13735 	if (flags & SP_SUBPAT)
13736 	    retval = subpatnum;
13737 	else
13738 	    retval = pos.lnum;
13739 	if (flags & SP_SETPCMARK)
13740 	    setpcmark();
13741 	curwin->w_cursor = pos;
13742 	if (match_pos != NULL)
13743 	{
13744 	    /* Store the match cursor position */
13745 	    match_pos->lnum = pos.lnum;
13746 	    match_pos->col = pos.col + 1;
13747 	}
13748 	/* "/$" will put the cursor after the end of the line, may need to
13749 	 * correct that here */
13750 	check_cursor();
13751     }
13752 
13753     /* If 'n' flag is used: restore cursor position. */
13754     if (flags & SP_NOMOVE)
13755 	curwin->w_cursor = save_cursor;
13756 theend:
13757     p_ws = save_p_ws;
13758 
13759     return retval;
13760 }
13761 
13762 /*
13763  * "search()" function
13764  */
13765     static void
13766 f_search(argvars, rettv)
13767     typval_T	*argvars;
13768     typval_T	*rettv;
13769 {
13770     int		flags = 0;
13771 
13772     rettv->vval.v_number = search_cmn(argvars, NULL, &flags);
13773 }
13774 
13775 /*
13776  * "searchdecl()" function
13777  */
13778     static void
13779 f_searchdecl(argvars, rettv)
13780     typval_T	*argvars;
13781     typval_T	*rettv;
13782 {
13783     int		locally = 1;
13784     int		thisblock = 0;
13785     int		error = FALSE;
13786     char_u	*name;
13787 
13788     rettv->vval.v_number = 1;	/* default: FAIL */
13789 
13790     name = get_tv_string_chk(&argvars[0]);
13791     if (argvars[1].v_type != VAR_UNKNOWN)
13792     {
13793 	locally = get_tv_number_chk(&argvars[1], &error) == 0;
13794 	if (!error && argvars[2].v_type != VAR_UNKNOWN)
13795 	    thisblock = get_tv_number_chk(&argvars[2], &error) != 0;
13796     }
13797     if (!error && name != NULL)
13798 	rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
13799 				     locally, thisblock, SEARCH_KEEP) == FAIL;
13800 }
13801 
13802 /*
13803  * Used by searchpair() and searchpairpos()
13804  */
13805     static int
13806 searchpair_cmn(argvars, match_pos)
13807     typval_T	*argvars;
13808     pos_T	*match_pos;
13809 {
13810     char_u	*spat, *mpat, *epat;
13811     char_u	*skip;
13812     int		save_p_ws = p_ws;
13813     int		dir;
13814     int		flags = 0;
13815     char_u	nbuf1[NUMBUFLEN];
13816     char_u	nbuf2[NUMBUFLEN];
13817     char_u	nbuf3[NUMBUFLEN];
13818     int		retval = 0;		/* default: FAIL */
13819     long	lnum_stop = 0;
13820 
13821     /* Get the three pattern arguments: start, middle, end. */
13822     spat = get_tv_string_chk(&argvars[0]);
13823     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
13824     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
13825     if (spat == NULL || mpat == NULL || epat == NULL)
13826 	goto theend;	    /* type error */
13827 
13828     /* Handle the optional fourth argument: flags */
13829     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13830     if (dir == 0)
13831 	goto theend;
13832 
13833     /* Don't accept SP_END or SP_SUBPAT.
13834      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13835      */
13836     if ((flags & (SP_END | SP_SUBPAT)) != 0
13837 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13838     {
13839 	EMSG2(_(e_invarg2), get_tv_string(&argvars[3]));
13840 	goto theend;
13841     }
13842 
13843     /* Optional fifth argument: skip expression */
13844     if (argvars[3].v_type == VAR_UNKNOWN
13845 	    || argvars[4].v_type == VAR_UNKNOWN)
13846 	skip = (char_u *)"";
13847     else
13848     {
13849 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13850 	if (argvars[5].v_type != VAR_UNKNOWN)
13851 	{
13852 	    lnum_stop = get_tv_number_chk(&argvars[5], NULL);
13853 	    if (lnum_stop < 0)
13854 		goto theend;
13855 	}
13856     }
13857     if (skip == NULL)
13858 	goto theend;	    /* type error */
13859 
13860     retval = do_searchpair(spat, mpat, epat, dir, skip, flags,
13861 							match_pos, lnum_stop);
13862 
13863 theend:
13864     p_ws = save_p_ws;
13865 
13866     return retval;
13867 }
13868 
13869 /*
13870  * "searchpair()" function
13871  */
13872     static void
13873 f_searchpair(argvars, rettv)
13874     typval_T	*argvars;
13875     typval_T	*rettv;
13876 {
13877     rettv->vval.v_number = searchpair_cmn(argvars, NULL);
13878 }
13879 
13880 /*
13881  * "searchpairpos()" function
13882  */
13883     static void
13884 f_searchpairpos(argvars, rettv)
13885     typval_T	*argvars;
13886     typval_T	*rettv;
13887 {
13888     pos_T	match_pos;
13889     int		lnum = 0;
13890     int		col = 0;
13891 
13892     rettv->vval.v_number = 0;
13893 
13894     if (rettv_list_alloc(rettv) == FAIL)
13895 	return;
13896 
13897     if (searchpair_cmn(argvars, &match_pos) > 0)
13898     {
13899 	lnum = match_pos.lnum;
13900 	col = match_pos.col;
13901     }
13902 
13903     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
13904     list_append_number(rettv->vval.v_list, (varnumber_T)col);
13905 }
13906 
13907 /*
13908  * Search for a start/middle/end thing.
13909  * Used by searchpair(), see its documentation for the details.
13910  * Returns 0 or -1 for no match,
13911  */
13912     long
13913 do_searchpair(spat, mpat, epat, dir, skip, flags, match_pos, lnum_stop)
13914     char_u	*spat;	    /* start pattern */
13915     char_u	*mpat;	    /* middle pattern */
13916     char_u	*epat;	    /* end pattern */
13917     int		dir;	    /* BACKWARD or FORWARD */
13918     char_u	*skip;	    /* skip expression */
13919     int		flags;	    /* SP_SETPCMARK and other SP_ values */
13920     pos_T	*match_pos;
13921     linenr_T	lnum_stop;  /* stop at this line if not zero */
13922 {
13923     char_u	*save_cpo;
13924     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13925     long	retval = 0;
13926     pos_T	pos;
13927     pos_T	firstpos;
13928     pos_T	foundpos;
13929     pos_T	save_cursor;
13930     pos_T	save_pos;
13931     int		n;
13932     int		r;
13933     int		nest = 1;
13934     int		err;
13935     int		options = SEARCH_KEEP;
13936 
13937     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13938     save_cpo = p_cpo;
13939     p_cpo = (char_u *)"";
13940 
13941     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13942      * start/middle/end (pat3, for the top pair). */
13943     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13944     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13945     if (pat2 == NULL || pat3 == NULL)
13946 	goto theend;
13947     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13948     if (*mpat == NUL)
13949 	STRCPY(pat3, pat2);
13950     else
13951 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13952 							    spat, epat, mpat);
13953     if (flags & SP_START)
13954 	options |= SEARCH_START;
13955 
13956     save_cursor = curwin->w_cursor;
13957     pos = curwin->w_cursor;
13958     clearpos(&firstpos);
13959     clearpos(&foundpos);
13960     pat = pat3;
13961     for (;;)
13962     {
13963 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13964 					       options, RE_SEARCH, lnum_stop);
13965 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13966 	    /* didn't find it or found the first match again: FAIL */
13967 	    break;
13968 
13969 	if (firstpos.lnum == 0)
13970 	    firstpos = pos;
13971 	if (equalpos(pos, foundpos))
13972 	{
13973 	    /* Found the same position again.  Can happen with a pattern that
13974 	     * has "\zs" at the end and searching backwards.  Advance one
13975 	     * character and try again. */
13976 	    if (dir == BACKWARD)
13977 		decl(&pos);
13978 	    else
13979 		incl(&pos);
13980 	}
13981 	foundpos = pos;
13982 
13983 	/* If the skip pattern matches, ignore this match. */
13984 	if (*skip != NUL)
13985 	{
13986 	    save_pos = curwin->w_cursor;
13987 	    curwin->w_cursor = pos;
13988 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13989 	    curwin->w_cursor = save_pos;
13990 	    if (err)
13991 	    {
13992 		/* Evaluating {skip} caused an error, break here. */
13993 		curwin->w_cursor = save_cursor;
13994 		retval = -1;
13995 		break;
13996 	    }
13997 	    if (r)
13998 		continue;
13999 	}
14000 
14001 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
14002 	{
14003 	    /* Found end when searching backwards or start when searching
14004 	     * forward: nested pair. */
14005 	    ++nest;
14006 	    pat = pat2;		/* nested, don't search for middle */
14007 	}
14008 	else
14009 	{
14010 	    /* Found end when searching forward or start when searching
14011 	     * backward: end of (nested) pair; or found middle in outer pair. */
14012 	    if (--nest == 1)
14013 		pat = pat3;	/* outer level, search for middle */
14014 	}
14015 
14016 	if (nest == 0)
14017 	{
14018 	    /* Found the match: return matchcount or line number. */
14019 	    if (flags & SP_RETCOUNT)
14020 		++retval;
14021 	    else
14022 		retval = pos.lnum;
14023 	    if (flags & SP_SETPCMARK)
14024 		setpcmark();
14025 	    curwin->w_cursor = pos;
14026 	    if (!(flags & SP_REPEAT))
14027 		break;
14028 	    nest = 1;	    /* search for next unmatched */
14029 	}
14030     }
14031 
14032     if (match_pos != NULL)
14033     {
14034 	/* Store the match cursor position */
14035 	match_pos->lnum = curwin->w_cursor.lnum;
14036 	match_pos->col = curwin->w_cursor.col + 1;
14037     }
14038 
14039     /* If 'n' flag is used or search failed: restore cursor position. */
14040     if ((flags & SP_NOMOVE) || retval == 0)
14041 	curwin->w_cursor = save_cursor;
14042 
14043 theend:
14044     vim_free(pat2);
14045     vim_free(pat3);
14046     p_cpo = save_cpo;
14047 
14048     return retval;
14049 }
14050 
14051 /*
14052  * "searchpos()" function
14053  */
14054     static void
14055 f_searchpos(argvars, rettv)
14056     typval_T	*argvars;
14057     typval_T	*rettv;
14058 {
14059     pos_T	match_pos;
14060     int		lnum = 0;
14061     int		col = 0;
14062     int		n;
14063     int		flags = 0;
14064 
14065     rettv->vval.v_number = 0;
14066 
14067     if (rettv_list_alloc(rettv) == FAIL)
14068 	return;
14069 
14070     n = search_cmn(argvars, &match_pos, &flags);
14071     if (n > 0)
14072     {
14073 	lnum = match_pos.lnum;
14074 	col = match_pos.col;
14075     }
14076 
14077     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
14078     list_append_number(rettv->vval.v_list, (varnumber_T)col);
14079     if (flags & SP_SUBPAT)
14080 	list_append_number(rettv->vval.v_list, (varnumber_T)n);
14081 }
14082 
14083 
14084 /*ARGSUSED*/
14085     static void
14086 f_server2client(argvars, rettv)
14087     typval_T	*argvars;
14088     typval_T	*rettv;
14089 {
14090 #ifdef FEAT_CLIENTSERVER
14091     char_u	buf[NUMBUFLEN];
14092     char_u	*server = get_tv_string_chk(&argvars[0]);
14093     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
14094 
14095     rettv->vval.v_number = -1;
14096     if (server == NULL || reply == NULL)
14097 	return;
14098     if (check_restricted() || check_secure())
14099 	return;
14100 # ifdef FEAT_X11
14101     if (check_connection() == FAIL)
14102 	return;
14103 # endif
14104 
14105     if (serverSendReply(server, reply) < 0)
14106     {
14107 	EMSG(_("E258: Unable to send to client"));
14108 	return;
14109     }
14110     rettv->vval.v_number = 0;
14111 #else
14112     rettv->vval.v_number = -1;
14113 #endif
14114 }
14115 
14116 /*ARGSUSED*/
14117     static void
14118 f_serverlist(argvars, rettv)
14119     typval_T	*argvars;
14120     typval_T	*rettv;
14121 {
14122     char_u	*r = NULL;
14123 
14124 #ifdef FEAT_CLIENTSERVER
14125 # ifdef WIN32
14126     r = serverGetVimNames();
14127 # else
14128     make_connection();
14129     if (X_DISPLAY != NULL)
14130 	r = serverGetVimNames(X_DISPLAY);
14131 # endif
14132 #endif
14133     rettv->v_type = VAR_STRING;
14134     rettv->vval.v_string = r;
14135 }
14136 
14137 /*
14138  * "setbufvar()" function
14139  */
14140 /*ARGSUSED*/
14141     static void
14142 f_setbufvar(argvars, rettv)
14143     typval_T	*argvars;
14144     typval_T	*rettv;
14145 {
14146     buf_T	*buf;
14147 #ifdef FEAT_AUTOCMD
14148     aco_save_T	aco;
14149 #else
14150     buf_T	*save_curbuf;
14151 #endif
14152     char_u	*varname, *bufvarname;
14153     typval_T	*varp;
14154     char_u	nbuf[NUMBUFLEN];
14155 
14156     rettv->vval.v_number = 0;
14157 
14158     if (check_restricted() || check_secure())
14159 	return;
14160     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
14161     varname = get_tv_string_chk(&argvars[1]);
14162     buf = get_buf_tv(&argvars[0]);
14163     varp = &argvars[2];
14164 
14165     if (buf != NULL && varname != NULL && varp != NULL)
14166     {
14167 	/* set curbuf to be our buf, temporarily */
14168 #ifdef FEAT_AUTOCMD
14169 	aucmd_prepbuf(&aco, buf);
14170 #else
14171 	save_curbuf = curbuf;
14172 	curbuf = buf;
14173 #endif
14174 
14175 	if (*varname == '&')
14176 	{
14177 	    long	numval;
14178 	    char_u	*strval;
14179 	    int		error = FALSE;
14180 
14181 	    ++varname;
14182 	    numval = get_tv_number_chk(varp, &error);
14183 	    strval = get_tv_string_buf_chk(varp, nbuf);
14184 	    if (!error && strval != NULL)
14185 		set_option_value(varname, numval, strval, OPT_LOCAL);
14186 	}
14187 	else
14188 	{
14189 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
14190 	    if (bufvarname != NULL)
14191 	    {
14192 		STRCPY(bufvarname, "b:");
14193 		STRCPY(bufvarname + 2, varname);
14194 		set_var(bufvarname, varp, TRUE);
14195 		vim_free(bufvarname);
14196 	    }
14197 	}
14198 
14199 	/* reset notion of buffer */
14200 #ifdef FEAT_AUTOCMD
14201 	aucmd_restbuf(&aco);
14202 #else
14203 	curbuf = save_curbuf;
14204 #endif
14205     }
14206 }
14207 
14208 /*
14209  * "setcmdpos()" function
14210  */
14211     static void
14212 f_setcmdpos(argvars, rettv)
14213     typval_T	*argvars;
14214     typval_T	*rettv;
14215 {
14216     int		pos = (int)get_tv_number(&argvars[0]) - 1;
14217 
14218     if (pos >= 0)
14219 	rettv->vval.v_number = set_cmdline_pos(pos);
14220 }
14221 
14222 /*
14223  * "setline()" function
14224  */
14225     static void
14226 f_setline(argvars, rettv)
14227     typval_T	*argvars;
14228     typval_T	*rettv;
14229 {
14230     linenr_T	lnum;
14231     char_u	*line = NULL;
14232     list_T	*l = NULL;
14233     listitem_T	*li = NULL;
14234     long	added = 0;
14235     linenr_T	lcount = curbuf->b_ml.ml_line_count;
14236 
14237     lnum = get_tv_lnum(&argvars[0]);
14238     if (argvars[1].v_type == VAR_LIST)
14239     {
14240 	l = argvars[1].vval.v_list;
14241 	li = l->lv_first;
14242     }
14243     else
14244 	line = get_tv_string_chk(&argvars[1]);
14245 
14246     rettv->vval.v_number = 0;		/* OK */
14247     for (;;)
14248     {
14249 	if (l != NULL)
14250 	{
14251 	    /* list argument, get next string */
14252 	    if (li == NULL)
14253 		break;
14254 	    line = get_tv_string_chk(&li->li_tv);
14255 	    li = li->li_next;
14256 	}
14257 
14258 	rettv->vval.v_number = 1;	/* FAIL */
14259 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
14260 	    break;
14261 	if (lnum <= curbuf->b_ml.ml_line_count)
14262 	{
14263 	    /* existing line, replace it */
14264 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
14265 	    {
14266 		changed_bytes(lnum, 0);
14267 		check_cursor_col();
14268 		rettv->vval.v_number = 0;	/* OK */
14269 	    }
14270 	}
14271 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
14272 	{
14273 	    /* lnum is one past the last line, append the line */
14274 	    ++added;
14275 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
14276 		rettv->vval.v_number = 0;	/* OK */
14277 	}
14278 
14279 	if (l == NULL)			/* only one string argument */
14280 	    break;
14281 	++lnum;
14282     }
14283 
14284     if (added > 0)
14285 	appended_lines_mark(lcount, added);
14286 }
14287 
14288 /*
14289  * Used by "setqflist()" and "setloclist()" functions
14290  */
14291 /*ARGSUSED*/
14292     static void
14293 set_qf_ll_list(wp, list_arg, action_arg, rettv)
14294     win_T	*wp;
14295     typval_T	*list_arg;
14296     typval_T	*action_arg;
14297     typval_T	*rettv;
14298 {
14299 #ifdef FEAT_QUICKFIX
14300     char_u	*act;
14301     int		action = ' ';
14302 #endif
14303 
14304     rettv->vval.v_number = -1;
14305 
14306 #ifdef FEAT_QUICKFIX
14307     if (list_arg->v_type != VAR_LIST)
14308 	EMSG(_(e_listreq));
14309     else
14310     {
14311 	list_T  *l = list_arg->vval.v_list;
14312 
14313 	if (action_arg->v_type == VAR_STRING)
14314 	{
14315 	    act = get_tv_string_chk(action_arg);
14316 	    if (act == NULL)
14317 		return;		/* type error; errmsg already given */
14318 	    if (*act == 'a' || *act == 'r')
14319 		action = *act;
14320 	}
14321 
14322 	if (l != NULL && set_errorlist(wp, l, action) == OK)
14323 	    rettv->vval.v_number = 0;
14324     }
14325 #endif
14326 }
14327 
14328 /*
14329  * "setloclist()" function
14330  */
14331 /*ARGSUSED*/
14332     static void
14333 f_setloclist(argvars, rettv)
14334     typval_T	*argvars;
14335     typval_T	*rettv;
14336 {
14337     win_T	*win;
14338 
14339     rettv->vval.v_number = -1;
14340 
14341     win = find_win_by_nr(&argvars[0], NULL);
14342     if (win != NULL)
14343 	set_qf_ll_list(win, &argvars[1], &argvars[2], rettv);
14344 }
14345 
14346 /*
14347  * "setpos()" function
14348  */
14349 /*ARGSUSED*/
14350     static void
14351 f_setpos(argvars, rettv)
14352     typval_T	*argvars;
14353     typval_T	*rettv;
14354 {
14355     pos_T	pos;
14356     int		fnum;
14357     char_u	*name;
14358 
14359     name = get_tv_string_chk(argvars);
14360     if (name != NULL)
14361     {
14362 	if (list2fpos(&argvars[1], &pos, &fnum) == OK)
14363 	{
14364 	    --pos.col;
14365 	    if (name[0] == '.')		/* cursor */
14366 	    {
14367 		if (fnum == curbuf->b_fnum)
14368 		{
14369 		    curwin->w_cursor = pos;
14370 		    check_cursor();
14371 		}
14372 		else
14373 		    EMSG(_(e_invarg));
14374 	    }
14375 	    else if (name[0] == '\'')	/* mark */
14376 		(void)setmark_pos(name[1], &pos, fnum);
14377 	    else
14378 		EMSG(_(e_invarg));
14379 	}
14380     }
14381 }
14382 
14383 /*
14384  * "setqflist()" function
14385  */
14386 /*ARGSUSED*/
14387     static void
14388 f_setqflist(argvars, rettv)
14389     typval_T	*argvars;
14390     typval_T	*rettv;
14391 {
14392     set_qf_ll_list(NULL, &argvars[0], &argvars[1], rettv);
14393 }
14394 
14395 /*
14396  * "setreg()" function
14397  */
14398     static void
14399 f_setreg(argvars, rettv)
14400     typval_T	*argvars;
14401     typval_T	*rettv;
14402 {
14403     int		regname;
14404     char_u	*strregname;
14405     char_u	*stropt;
14406     char_u	*strval;
14407     int		append;
14408     char_u	yank_type;
14409     long	block_len;
14410 
14411     block_len = -1;
14412     yank_type = MAUTO;
14413     append = FALSE;
14414 
14415     strregname = get_tv_string_chk(argvars);
14416     rettv->vval.v_number = 1;		/* FAIL is default */
14417 
14418     if (strregname == NULL)
14419 	return;		/* type error; errmsg already given */
14420     regname = *strregname;
14421     if (regname == 0 || regname == '@')
14422 	regname = '"';
14423     else if (regname == '=')
14424 	return;
14425 
14426     if (argvars[2].v_type != VAR_UNKNOWN)
14427     {
14428 	stropt = get_tv_string_chk(&argvars[2]);
14429 	if (stropt == NULL)
14430 	    return;		/* type error */
14431 	for (; *stropt != NUL; ++stropt)
14432 	    switch (*stropt)
14433 	    {
14434 		case 'a': case 'A':	/* append */
14435 		    append = TRUE;
14436 		    break;
14437 		case 'v': case 'c':	/* character-wise selection */
14438 		    yank_type = MCHAR;
14439 		    break;
14440 		case 'V': case 'l':	/* line-wise selection */
14441 		    yank_type = MLINE;
14442 		    break;
14443 #ifdef FEAT_VISUAL
14444 		case 'b': case Ctrl_V:	/* block-wise selection */
14445 		    yank_type = MBLOCK;
14446 		    if (VIM_ISDIGIT(stropt[1]))
14447 		    {
14448 			++stropt;
14449 			block_len = getdigits(&stropt) - 1;
14450 			--stropt;
14451 		    }
14452 		    break;
14453 #endif
14454 	    }
14455     }
14456 
14457     strval = get_tv_string_chk(&argvars[1]);
14458     if (strval != NULL)
14459 	write_reg_contents_ex(regname, strval, -1,
14460 						append, yank_type, block_len);
14461     rettv->vval.v_number = 0;
14462 }
14463 
14464 /*
14465  * "settabwinvar()" function
14466  */
14467     static void
14468 f_settabwinvar(argvars, rettv)
14469     typval_T	*argvars;
14470     typval_T	*rettv;
14471 {
14472     setwinvar(argvars, rettv, 1);
14473 }
14474 
14475 /*
14476  * "setwinvar()" function
14477  */
14478     static void
14479 f_setwinvar(argvars, rettv)
14480     typval_T	*argvars;
14481     typval_T	*rettv;
14482 {
14483     setwinvar(argvars, rettv, 0);
14484 }
14485 
14486 /*
14487  * "setwinvar()" and "settabwinvar()" functions
14488  */
14489     static void
14490 setwinvar(argvars, rettv, off)
14491     typval_T	*argvars;
14492     typval_T	*rettv;
14493     int		off;
14494 {
14495     win_T	*win;
14496 #ifdef FEAT_WINDOWS
14497     win_T	*save_curwin;
14498     tabpage_T	*save_curtab;
14499 #endif
14500     char_u	*varname, *winvarname;
14501     typval_T	*varp;
14502     char_u	nbuf[NUMBUFLEN];
14503     tabpage_T	*tp;
14504 
14505     rettv->vval.v_number = 0;
14506 
14507     if (check_restricted() || check_secure())
14508 	return;
14509 
14510 #ifdef FEAT_WINDOWS
14511     if (off == 1)
14512 	tp = find_tabpage((int)get_tv_number_chk(&argvars[0], NULL));
14513     else
14514 	tp = curtab;
14515 #endif
14516     win = find_win_by_nr(&argvars[off], tp);
14517     varname = get_tv_string_chk(&argvars[off + 1]);
14518     varp = &argvars[off + 2];
14519 
14520     if (win != NULL && varname != NULL && varp != NULL)
14521     {
14522 #ifdef FEAT_WINDOWS
14523 	/* set curwin to be our win, temporarily */
14524 	save_curwin = curwin;
14525 	save_curtab = curtab;
14526 	goto_tabpage_tp(tp);
14527 	if (!win_valid(win))
14528 	    return;
14529 	curwin = win;
14530 	curbuf = curwin->w_buffer;
14531 #endif
14532 
14533 	if (*varname == '&')
14534 	{
14535 	    long	numval;
14536 	    char_u	*strval;
14537 	    int		error = FALSE;
14538 
14539 	    ++varname;
14540 	    numval = get_tv_number_chk(varp, &error);
14541 	    strval = get_tv_string_buf_chk(varp, nbuf);
14542 	    if (!error && strval != NULL)
14543 		set_option_value(varname, numval, strval, OPT_LOCAL);
14544 	}
14545 	else
14546 	{
14547 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
14548 	    if (winvarname != NULL)
14549 	    {
14550 		STRCPY(winvarname, "w:");
14551 		STRCPY(winvarname + 2, varname);
14552 		set_var(winvarname, varp, TRUE);
14553 		vim_free(winvarname);
14554 	    }
14555 	}
14556 
14557 #ifdef FEAT_WINDOWS
14558 	/* Restore current tabpage and window, if still valid (autocomands can
14559 	 * make them invalid). */
14560 	if (valid_tabpage(save_curtab))
14561 	    goto_tabpage_tp(save_curtab);
14562 	if (win_valid(save_curwin))
14563 	{
14564 	    curwin = save_curwin;
14565 	    curbuf = curwin->w_buffer;
14566 	}
14567 #endif
14568     }
14569 }
14570 
14571 /*
14572  * "simplify()" function
14573  */
14574     static void
14575 f_simplify(argvars, rettv)
14576     typval_T	*argvars;
14577     typval_T	*rettv;
14578 {
14579     char_u	*p;
14580 
14581     p = get_tv_string(&argvars[0]);
14582     rettv->vval.v_string = vim_strsave(p);
14583     simplify_filename(rettv->vval.v_string);	/* simplify in place */
14584     rettv->v_type = VAR_STRING;
14585 }
14586 
14587 static int
14588 #ifdef __BORLANDC__
14589     _RTLENTRYF
14590 #endif
14591 	item_compare __ARGS((const void *s1, const void *s2));
14592 static int
14593 #ifdef __BORLANDC__
14594     _RTLENTRYF
14595 #endif
14596 	item_compare2 __ARGS((const void *s1, const void *s2));
14597 
14598 static int	item_compare_ic;
14599 static char_u	*item_compare_func;
14600 static int	item_compare_func_err;
14601 #define ITEM_COMPARE_FAIL 999
14602 
14603 /*
14604  * Compare functions for f_sort() below.
14605  */
14606     static int
14607 #ifdef __BORLANDC__
14608 _RTLENTRYF
14609 #endif
14610 item_compare(s1, s2)
14611     const void	*s1;
14612     const void	*s2;
14613 {
14614     char_u	*p1, *p2;
14615     char_u	*tofree1, *tofree2;
14616     int		res;
14617     char_u	numbuf1[NUMBUFLEN];
14618     char_u	numbuf2[NUMBUFLEN];
14619 
14620     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1, 0);
14621     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2, 0);
14622     if (item_compare_ic)
14623 	res = STRICMP(p1, p2);
14624     else
14625 	res = STRCMP(p1, p2);
14626     vim_free(tofree1);
14627     vim_free(tofree2);
14628     return res;
14629 }
14630 
14631     static int
14632 #ifdef __BORLANDC__
14633 _RTLENTRYF
14634 #endif
14635 item_compare2(s1, s2)
14636     const void	*s1;
14637     const void	*s2;
14638 {
14639     int		res;
14640     typval_T	rettv;
14641     typval_T	argv[3];
14642     int		dummy;
14643 
14644     /* shortcut after failure in previous call; compare all items equal */
14645     if (item_compare_func_err)
14646 	return 0;
14647 
14648     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
14649      * in the copy without changing the original list items. */
14650     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
14651     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
14652 
14653     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
14654     res = call_func(item_compare_func, (int)STRLEN(item_compare_func),
14655 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
14656     clear_tv(&argv[0]);
14657     clear_tv(&argv[1]);
14658 
14659     if (res == FAIL)
14660 	res = ITEM_COMPARE_FAIL;
14661     else
14662 	/* return value has wrong type */
14663 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
14664     if (item_compare_func_err)
14665 	res = ITEM_COMPARE_FAIL;
14666     clear_tv(&rettv);
14667     return res;
14668 }
14669 
14670 /*
14671  * "sort({list})" function
14672  */
14673     static void
14674 f_sort(argvars, rettv)
14675     typval_T	*argvars;
14676     typval_T	*rettv;
14677 {
14678     list_T	*l;
14679     listitem_T	*li;
14680     listitem_T	**ptrs;
14681     long	len;
14682     long	i;
14683 
14684     rettv->vval.v_number = 0;
14685     if (argvars[0].v_type != VAR_LIST)
14686 	EMSG2(_(e_listarg), "sort()");
14687     else
14688     {
14689 	l = argvars[0].vval.v_list;
14690 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
14691 	    return;
14692 	rettv->vval.v_list = l;
14693 	rettv->v_type = VAR_LIST;
14694 	++l->lv_refcount;
14695 
14696 	len = list_len(l);
14697 	if (len <= 1)
14698 	    return;	/* short list sorts pretty quickly */
14699 
14700 	item_compare_ic = FALSE;
14701 	item_compare_func = NULL;
14702 	if (argvars[1].v_type != VAR_UNKNOWN)
14703 	{
14704 	    if (argvars[1].v_type == VAR_FUNC)
14705 		item_compare_func = argvars[1].vval.v_string;
14706 	    else
14707 	    {
14708 		int	    error = FALSE;
14709 
14710 		i = get_tv_number_chk(&argvars[1], &error);
14711 		if (error)
14712 		    return;		/* type error; errmsg already given */
14713 		if (i == 1)
14714 		    item_compare_ic = TRUE;
14715 		else
14716 		    item_compare_func = get_tv_string(&argvars[1]);
14717 	    }
14718 	}
14719 
14720 	/* Make an array with each entry pointing to an item in the List. */
14721 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
14722 	if (ptrs == NULL)
14723 	    return;
14724 	i = 0;
14725 	for (li = l->lv_first; li != NULL; li = li->li_next)
14726 	    ptrs[i++] = li;
14727 
14728 	item_compare_func_err = FALSE;
14729 	/* test the compare function */
14730 	if (item_compare_func != NULL
14731 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
14732 							 == ITEM_COMPARE_FAIL)
14733 	    EMSG(_("E702: Sort compare function failed"));
14734 	else
14735 	{
14736 	    /* Sort the array with item pointers. */
14737 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
14738 		    item_compare_func == NULL ? item_compare : item_compare2);
14739 
14740 	    if (!item_compare_func_err)
14741 	    {
14742 		/* Clear the List and append the items in the sorted order. */
14743 		l->lv_first = l->lv_last = NULL;
14744 		l->lv_len = 0;
14745 		for (i = 0; i < len; ++i)
14746 		    list_append(l, ptrs[i]);
14747 	    }
14748 	}
14749 
14750 	vim_free(ptrs);
14751     }
14752 }
14753 
14754 /*
14755  * "soundfold({word})" function
14756  */
14757     static void
14758 f_soundfold(argvars, rettv)
14759     typval_T	*argvars;
14760     typval_T	*rettv;
14761 {
14762     char_u	*s;
14763 
14764     rettv->v_type = VAR_STRING;
14765     s = get_tv_string(&argvars[0]);
14766 #ifdef FEAT_SPELL
14767     rettv->vval.v_string = eval_soundfold(s);
14768 #else
14769     rettv->vval.v_string = vim_strsave(s);
14770 #endif
14771 }
14772 
14773 /*
14774  * "spellbadword()" function
14775  */
14776 /* ARGSUSED */
14777     static void
14778 f_spellbadword(argvars, rettv)
14779     typval_T	*argvars;
14780     typval_T	*rettv;
14781 {
14782     char_u	*word = (char_u *)"";
14783     hlf_T	attr = HLF_COUNT;
14784     int		len = 0;
14785 
14786     if (rettv_list_alloc(rettv) == FAIL)
14787 	return;
14788 
14789 #ifdef FEAT_SPELL
14790     if (argvars[0].v_type == VAR_UNKNOWN)
14791     {
14792 	/* Find the start and length of the badly spelled word. */
14793 	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
14794 	if (len != 0)
14795 	    word = ml_get_cursor();
14796     }
14797     else if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14798     {
14799 	char_u	*str = get_tv_string_chk(&argvars[0]);
14800 	int	capcol = -1;
14801 
14802 	if (str != NULL)
14803 	{
14804 	    /* Check the argument for spelling. */
14805 	    while (*str != NUL)
14806 	    {
14807 		len = spell_check(curwin, str, &attr, &capcol, FALSE);
14808 		if (attr != HLF_COUNT)
14809 		{
14810 		    word = str;
14811 		    break;
14812 		}
14813 		str += len;
14814 	    }
14815 	}
14816     }
14817 #endif
14818 
14819     list_append_string(rettv->vval.v_list, word, len);
14820     list_append_string(rettv->vval.v_list, (char_u *)(
14821 			attr == HLF_SPB ? "bad" :
14822 			attr == HLF_SPR ? "rare" :
14823 			attr == HLF_SPL ? "local" :
14824 			attr == HLF_SPC ? "caps" :
14825 			""), -1);
14826 }
14827 
14828 /*
14829  * "spellsuggest()" function
14830  */
14831 /*ARGSUSED*/
14832     static void
14833 f_spellsuggest(argvars, rettv)
14834     typval_T	*argvars;
14835     typval_T	*rettv;
14836 {
14837 #ifdef FEAT_SPELL
14838     char_u	*str;
14839     int		typeerr = FALSE;
14840     int		maxcount;
14841     garray_T	ga;
14842     int		i;
14843     listitem_T	*li;
14844     int		need_capital = FALSE;
14845 #endif
14846 
14847     if (rettv_list_alloc(rettv) == FAIL)
14848 	return;
14849 
14850 #ifdef FEAT_SPELL
14851     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14852     {
14853 	str = get_tv_string(&argvars[0]);
14854 	if (argvars[1].v_type != VAR_UNKNOWN)
14855 	{
14856 	    maxcount = get_tv_number_chk(&argvars[1], &typeerr);
14857 	    if (maxcount <= 0)
14858 		return;
14859 	    if (argvars[2].v_type != VAR_UNKNOWN)
14860 	    {
14861 		need_capital = get_tv_number_chk(&argvars[2], &typeerr);
14862 		if (typeerr)
14863 		    return;
14864 	    }
14865 	}
14866 	else
14867 	    maxcount = 25;
14868 
14869 	spell_suggest_list(&ga, str, maxcount, need_capital, FALSE);
14870 
14871 	for (i = 0; i < ga.ga_len; ++i)
14872 	{
14873 	    str = ((char_u **)ga.ga_data)[i];
14874 
14875 	    li = listitem_alloc();
14876 	    if (li == NULL)
14877 		vim_free(str);
14878 	    else
14879 	    {
14880 		li->li_tv.v_type = VAR_STRING;
14881 		li->li_tv.v_lock = 0;
14882 		li->li_tv.vval.v_string = str;
14883 		list_append(rettv->vval.v_list, li);
14884 	    }
14885 	}
14886 	ga_clear(&ga);
14887     }
14888 #endif
14889 }
14890 
14891     static void
14892 f_split(argvars, rettv)
14893     typval_T	*argvars;
14894     typval_T	*rettv;
14895 {
14896     char_u	*str;
14897     char_u	*end;
14898     char_u	*pat = NULL;
14899     regmatch_T	regmatch;
14900     char_u	patbuf[NUMBUFLEN];
14901     char_u	*save_cpo;
14902     int		match;
14903     colnr_T	col = 0;
14904     int		keepempty = FALSE;
14905     int		typeerr = FALSE;
14906 
14907     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
14908     save_cpo = p_cpo;
14909     p_cpo = (char_u *)"";
14910 
14911     str = get_tv_string(&argvars[0]);
14912     if (argvars[1].v_type != VAR_UNKNOWN)
14913     {
14914 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14915 	if (pat == NULL)
14916 	    typeerr = TRUE;
14917 	if (argvars[2].v_type != VAR_UNKNOWN)
14918 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
14919     }
14920     if (pat == NULL || *pat == NUL)
14921 	pat = (char_u *)"[\\x01- ]\\+";
14922 
14923     if (rettv_list_alloc(rettv) == FAIL)
14924 	return;
14925     if (typeerr)
14926 	return;
14927 
14928     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
14929     if (regmatch.regprog != NULL)
14930     {
14931 	regmatch.rm_ic = FALSE;
14932 	while (*str != NUL || keepempty)
14933 	{
14934 	    if (*str == NUL)
14935 		match = FALSE;	/* empty item at the end */
14936 	    else
14937 		match = vim_regexec_nl(&regmatch, str, col);
14938 	    if (match)
14939 		end = regmatch.startp[0];
14940 	    else
14941 		end = str + STRLEN(str);
14942 	    if (keepempty || end > str || (rettv->vval.v_list->lv_len > 0
14943 			   && *str != NUL && match && end < regmatch.endp[0]))
14944 	    {
14945 		if (list_append_string(rettv->vval.v_list, str,
14946 						    (int)(end - str)) == FAIL)
14947 		    break;
14948 	    }
14949 	    if (!match)
14950 		break;
14951 	    /* Advance to just after the match. */
14952 	    if (regmatch.endp[0] > str)
14953 		col = 0;
14954 	    else
14955 	    {
14956 		/* Don't get stuck at the same match. */
14957 #ifdef FEAT_MBYTE
14958 		col = (*mb_ptr2len)(regmatch.endp[0]);
14959 #else
14960 		col = 1;
14961 #endif
14962 	    }
14963 	    str = regmatch.endp[0];
14964 	}
14965 
14966 	vim_free(regmatch.regprog);
14967     }
14968 
14969     p_cpo = save_cpo;
14970 }
14971 
14972 /*
14973  * "str2nr()" function
14974  */
14975     static void
14976 f_str2nr(argvars, rettv)
14977     typval_T	*argvars;
14978     typval_T	*rettv;
14979 {
14980     int		base = 10;
14981     char_u	*p;
14982     long	n;
14983 
14984     if (argvars[1].v_type != VAR_UNKNOWN)
14985     {
14986 	base = get_tv_number(&argvars[1]);
14987 	if (base != 8 && base != 10 && base != 16)
14988 	{
14989 	    EMSG(_(e_invarg));
14990 	    return;
14991 	}
14992     }
14993 
14994     p = skipwhite(get_tv_string(&argvars[0]));
14995     vim_str2nr(p, NULL, NULL, base == 8 ? 2 : 0, base == 16 ? 2 : 0, &n, NULL);
14996     rettv->vval.v_number = n;
14997 }
14998 
14999 #ifdef HAVE_STRFTIME
15000 /*
15001  * "strftime({format}[, {time}])" function
15002  */
15003     static void
15004 f_strftime(argvars, rettv)
15005     typval_T	*argvars;
15006     typval_T	*rettv;
15007 {
15008     char_u	result_buf[256];
15009     struct tm	*curtime;
15010     time_t	seconds;
15011     char_u	*p;
15012 
15013     rettv->v_type = VAR_STRING;
15014 
15015     p = get_tv_string(&argvars[0]);
15016     if (argvars[1].v_type == VAR_UNKNOWN)
15017 	seconds = time(NULL);
15018     else
15019 	seconds = (time_t)get_tv_number(&argvars[1]);
15020     curtime = localtime(&seconds);
15021     /* MSVC returns NULL for an invalid value of seconds. */
15022     if (curtime == NULL)
15023 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
15024     else
15025     {
15026 # ifdef FEAT_MBYTE
15027 	vimconv_T   conv;
15028 	char_u	    *enc;
15029 
15030 	conv.vc_type = CONV_NONE;
15031 	enc = enc_locale();
15032 	convert_setup(&conv, p_enc, enc);
15033 	if (conv.vc_type != CONV_NONE)
15034 	    p = string_convert(&conv, p, NULL);
15035 # endif
15036 	if (p != NULL)
15037 	    (void)strftime((char *)result_buf, sizeof(result_buf),
15038 							  (char *)p, curtime);
15039 	else
15040 	    result_buf[0] = NUL;
15041 
15042 # ifdef FEAT_MBYTE
15043 	if (conv.vc_type != CONV_NONE)
15044 	    vim_free(p);
15045 	convert_setup(&conv, enc, p_enc);
15046 	if (conv.vc_type != CONV_NONE)
15047 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
15048 	else
15049 # endif
15050 	    rettv->vval.v_string = vim_strsave(result_buf);
15051 
15052 # ifdef FEAT_MBYTE
15053 	/* Release conversion descriptors */
15054 	convert_setup(&conv, NULL, NULL);
15055 	vim_free(enc);
15056 # endif
15057     }
15058 }
15059 #endif
15060 
15061 /*
15062  * "stridx()" function
15063  */
15064     static void
15065 f_stridx(argvars, rettv)
15066     typval_T	*argvars;
15067     typval_T	*rettv;
15068 {
15069     char_u	buf[NUMBUFLEN];
15070     char_u	*needle;
15071     char_u	*haystack;
15072     char_u	*save_haystack;
15073     char_u	*pos;
15074     int		start_idx;
15075 
15076     needle = get_tv_string_chk(&argvars[1]);
15077     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
15078     rettv->vval.v_number = -1;
15079     if (needle == NULL || haystack == NULL)
15080 	return;		/* type error; errmsg already given */
15081 
15082     if (argvars[2].v_type != VAR_UNKNOWN)
15083     {
15084 	int	    error = FALSE;
15085 
15086 	start_idx = get_tv_number_chk(&argvars[2], &error);
15087 	if (error || start_idx >= (int)STRLEN(haystack))
15088 	    return;
15089 	if (start_idx >= 0)
15090 	    haystack += start_idx;
15091     }
15092 
15093     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
15094     if (pos != NULL)
15095 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
15096 }
15097 
15098 /*
15099  * "string()" function
15100  */
15101     static void
15102 f_string(argvars, rettv)
15103     typval_T	*argvars;
15104     typval_T	*rettv;
15105 {
15106     char_u	*tofree;
15107     char_u	numbuf[NUMBUFLEN];
15108 
15109     rettv->v_type = VAR_STRING;
15110     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf, 0);
15111     if (tofree == NULL)
15112 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
15113 }
15114 
15115 /*
15116  * "strlen()" function
15117  */
15118     static void
15119 f_strlen(argvars, rettv)
15120     typval_T	*argvars;
15121     typval_T	*rettv;
15122 {
15123     rettv->vval.v_number = (varnumber_T)(STRLEN(
15124 					      get_tv_string(&argvars[0])));
15125 }
15126 
15127 /*
15128  * "strpart()" function
15129  */
15130     static void
15131 f_strpart(argvars, rettv)
15132     typval_T	*argvars;
15133     typval_T	*rettv;
15134 {
15135     char_u	*p;
15136     int		n;
15137     int		len;
15138     int		slen;
15139     int		error = FALSE;
15140 
15141     p = get_tv_string(&argvars[0]);
15142     slen = (int)STRLEN(p);
15143 
15144     n = get_tv_number_chk(&argvars[1], &error);
15145     if (error)
15146 	len = 0;
15147     else if (argvars[2].v_type != VAR_UNKNOWN)
15148 	len = get_tv_number(&argvars[2]);
15149     else
15150 	len = slen - n;	    /* default len: all bytes that are available. */
15151 
15152     /*
15153      * Only return the overlap between the specified part and the actual
15154      * string.
15155      */
15156     if (n < 0)
15157     {
15158 	len += n;
15159 	n = 0;
15160     }
15161     else if (n > slen)
15162 	n = slen;
15163     if (len < 0)
15164 	len = 0;
15165     else if (n + len > slen)
15166 	len = slen - n;
15167 
15168     rettv->v_type = VAR_STRING;
15169     rettv->vval.v_string = vim_strnsave(p + n, len);
15170 }
15171 
15172 /*
15173  * "strridx()" function
15174  */
15175     static void
15176 f_strridx(argvars, rettv)
15177     typval_T	*argvars;
15178     typval_T	*rettv;
15179 {
15180     char_u	buf[NUMBUFLEN];
15181     char_u	*needle;
15182     char_u	*haystack;
15183     char_u	*rest;
15184     char_u	*lastmatch = NULL;
15185     int		haystack_len, end_idx;
15186 
15187     needle = get_tv_string_chk(&argvars[1]);
15188     haystack = get_tv_string_buf_chk(&argvars[0], buf);
15189 
15190     rettv->vval.v_number = -1;
15191     if (needle == NULL || haystack == NULL)
15192 	return;		/* type error; errmsg already given */
15193 
15194     haystack_len = (int)STRLEN(haystack);
15195     if (argvars[2].v_type != VAR_UNKNOWN)
15196     {
15197 	/* Third argument: upper limit for index */
15198 	end_idx = get_tv_number_chk(&argvars[2], NULL);
15199 	if (end_idx < 0)
15200 	    return;	/* can never find a match */
15201     }
15202     else
15203 	end_idx = haystack_len;
15204 
15205     if (*needle == NUL)
15206     {
15207 	/* Empty string matches past the end. */
15208 	lastmatch = haystack + end_idx;
15209     }
15210     else
15211     {
15212 	for (rest = haystack; *rest != '\0'; ++rest)
15213 	{
15214 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
15215 	    if (rest == NULL || rest > haystack + end_idx)
15216 		break;
15217 	    lastmatch = rest;
15218 	}
15219     }
15220 
15221     if (lastmatch == NULL)
15222 	rettv->vval.v_number = -1;
15223     else
15224 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
15225 }
15226 
15227 /*
15228  * "strtrans()" function
15229  */
15230     static void
15231 f_strtrans(argvars, rettv)
15232     typval_T	*argvars;
15233     typval_T	*rettv;
15234 {
15235     rettv->v_type = VAR_STRING;
15236     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
15237 }
15238 
15239 /*
15240  * "submatch()" function
15241  */
15242     static void
15243 f_submatch(argvars, rettv)
15244     typval_T	*argvars;
15245     typval_T	*rettv;
15246 {
15247     rettv->v_type = VAR_STRING;
15248     rettv->vval.v_string =
15249 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
15250 }
15251 
15252 /*
15253  * "substitute()" function
15254  */
15255     static void
15256 f_substitute(argvars, rettv)
15257     typval_T	*argvars;
15258     typval_T	*rettv;
15259 {
15260     char_u	patbuf[NUMBUFLEN];
15261     char_u	subbuf[NUMBUFLEN];
15262     char_u	flagsbuf[NUMBUFLEN];
15263 
15264     char_u	*str = get_tv_string_chk(&argvars[0]);
15265     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
15266     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
15267     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
15268 
15269     rettv->v_type = VAR_STRING;
15270     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
15271 	rettv->vval.v_string = NULL;
15272     else
15273 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
15274 }
15275 
15276 /*
15277  * "synID(lnum, col, trans)" function
15278  */
15279 /*ARGSUSED*/
15280     static void
15281 f_synID(argvars, rettv)
15282     typval_T	*argvars;
15283     typval_T	*rettv;
15284 {
15285     int		id = 0;
15286 #ifdef FEAT_SYN_HL
15287     long	lnum;
15288     long	col;
15289     int		trans;
15290     int		transerr = FALSE;
15291 
15292     lnum = get_tv_lnum(argvars);		/* -1 on type error */
15293     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
15294     trans = get_tv_number_chk(&argvars[2], &transerr);
15295 
15296     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
15297 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
15298 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
15299 #endif
15300 
15301     rettv->vval.v_number = id;
15302 }
15303 
15304 /*
15305  * "synIDattr(id, what [, mode])" function
15306  */
15307 /*ARGSUSED*/
15308     static void
15309 f_synIDattr(argvars, rettv)
15310     typval_T	*argvars;
15311     typval_T	*rettv;
15312 {
15313     char_u	*p = NULL;
15314 #ifdef FEAT_SYN_HL
15315     int		id;
15316     char_u	*what;
15317     char_u	*mode;
15318     char_u	modebuf[NUMBUFLEN];
15319     int		modec;
15320 
15321     id = get_tv_number(&argvars[0]);
15322     what = get_tv_string(&argvars[1]);
15323     if (argvars[2].v_type != VAR_UNKNOWN)
15324     {
15325 	mode = get_tv_string_buf(&argvars[2], modebuf);
15326 	modec = TOLOWER_ASC(mode[0]);
15327 	if (modec != 't' && modec != 'c'
15328 #ifdef FEAT_GUI
15329 		&& modec != 'g'
15330 #endif
15331 		)
15332 	    modec = 0;	/* replace invalid with current */
15333     }
15334     else
15335     {
15336 #ifdef FEAT_GUI
15337 	if (gui.in_use)
15338 	    modec = 'g';
15339 	else
15340 #endif
15341 	    if (t_colors > 1)
15342 	    modec = 'c';
15343 	else
15344 	    modec = 't';
15345     }
15346 
15347 
15348     switch (TOLOWER_ASC(what[0]))
15349     {
15350 	case 'b':
15351 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
15352 		    p = highlight_color(id, what, modec);
15353 		else					/* bold */
15354 		    p = highlight_has_attr(id, HL_BOLD, modec);
15355 		break;
15356 
15357 	case 'f':					/* fg[#] */
15358 		p = highlight_color(id, what, modec);
15359 		break;
15360 
15361 	case 'i':
15362 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
15363 		    p = highlight_has_attr(id, HL_INVERSE, modec);
15364 		else					/* italic */
15365 		    p = highlight_has_attr(id, HL_ITALIC, modec);
15366 		break;
15367 
15368 	case 'n':					/* name */
15369 		p = get_highlight_name(NULL, id - 1);
15370 		break;
15371 
15372 	case 'r':					/* reverse */
15373 		p = highlight_has_attr(id, HL_INVERSE, modec);
15374 		break;
15375 
15376 	case 's':					/* standout */
15377 		p = highlight_has_attr(id, HL_STANDOUT, modec);
15378 		break;
15379 
15380 	case 'u':
15381 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
15382 							/* underline */
15383 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
15384 		else
15385 							/* undercurl */
15386 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
15387 		break;
15388     }
15389 
15390     if (p != NULL)
15391 	p = vim_strsave(p);
15392 #endif
15393     rettv->v_type = VAR_STRING;
15394     rettv->vval.v_string = p;
15395 }
15396 
15397 /*
15398  * "synIDtrans(id)" function
15399  */
15400 /*ARGSUSED*/
15401     static void
15402 f_synIDtrans(argvars, rettv)
15403     typval_T	*argvars;
15404     typval_T	*rettv;
15405 {
15406     int		id;
15407 
15408 #ifdef FEAT_SYN_HL
15409     id = get_tv_number(&argvars[0]);
15410 
15411     if (id > 0)
15412 	id = syn_get_final_id(id);
15413     else
15414 #endif
15415 	id = 0;
15416 
15417     rettv->vval.v_number = id;
15418 }
15419 
15420 /*
15421  * "system()" function
15422  */
15423     static void
15424 f_system(argvars, rettv)
15425     typval_T	*argvars;
15426     typval_T	*rettv;
15427 {
15428     char_u	*res = NULL;
15429     char_u	*p;
15430     char_u	*infile = NULL;
15431     char_u	buf[NUMBUFLEN];
15432     int		err = FALSE;
15433     FILE	*fd;
15434 
15435     if (argvars[1].v_type != VAR_UNKNOWN)
15436     {
15437 	/*
15438 	 * Write the string to a temp file, to be used for input of the shell
15439 	 * command.
15440 	 */
15441 	if ((infile = vim_tempname('i')) == NULL)
15442 	{
15443 	    EMSG(_(e_notmp));
15444 	    return;
15445 	}
15446 
15447 	fd = mch_fopen((char *)infile, WRITEBIN);
15448 	if (fd == NULL)
15449 	{
15450 	    EMSG2(_(e_notopen), infile);
15451 	    goto done;
15452 	}
15453 	p = get_tv_string_buf_chk(&argvars[1], buf);
15454 	if (p == NULL)
15455 	{
15456 	    fclose(fd);
15457 	    goto done;		/* type error; errmsg already given */
15458 	}
15459 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
15460 	    err = TRUE;
15461 	if (fclose(fd) != 0)
15462 	    err = TRUE;
15463 	if (err)
15464 	{
15465 	    EMSG(_("E677: Error writing temp file"));
15466 	    goto done;
15467 	}
15468     }
15469 
15470     res = get_cmd_output(get_tv_string(&argvars[0]), infile,
15471 						 SHELL_SILENT | SHELL_COOKED);
15472 
15473 #ifdef USE_CR
15474     /* translate <CR> into <NL> */
15475     if (res != NULL)
15476     {
15477 	char_u	*s;
15478 
15479 	for (s = res; *s; ++s)
15480 	{
15481 	    if (*s == CAR)
15482 		*s = NL;
15483 	}
15484     }
15485 #else
15486 # ifdef USE_CRNL
15487     /* translate <CR><NL> into <NL> */
15488     if (res != NULL)
15489     {
15490 	char_u	*s, *d;
15491 
15492 	d = res;
15493 	for (s = res; *s; ++s)
15494 	{
15495 	    if (s[0] == CAR && s[1] == NL)
15496 		++s;
15497 	    *d++ = *s;
15498 	}
15499 	*d = NUL;
15500     }
15501 # endif
15502 #endif
15503 
15504 done:
15505     if (infile != NULL)
15506     {
15507 	mch_remove(infile);
15508 	vim_free(infile);
15509     }
15510     rettv->v_type = VAR_STRING;
15511     rettv->vval.v_string = res;
15512 }
15513 
15514 /*
15515  * "tabpagebuflist()" function
15516  */
15517 /* ARGSUSED */
15518     static void
15519 f_tabpagebuflist(argvars, rettv)
15520     typval_T	*argvars;
15521     typval_T	*rettv;
15522 {
15523 #ifndef FEAT_WINDOWS
15524     rettv->vval.v_number = 0;
15525 #else
15526     tabpage_T	*tp;
15527     win_T	*wp = NULL;
15528 
15529     if (argvars[0].v_type == VAR_UNKNOWN)
15530 	wp = firstwin;
15531     else
15532     {
15533 	tp = find_tabpage((int)get_tv_number(&argvars[0]));
15534 	if (tp != NULL)
15535 	    wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15536     }
15537     if (wp == NULL)
15538 	rettv->vval.v_number = 0;
15539     else
15540     {
15541 	if (rettv_list_alloc(rettv) == FAIL)
15542 	    rettv->vval.v_number = 0;
15543 	else
15544 	{
15545 	    for (; wp != NULL; wp = wp->w_next)
15546 		if (list_append_number(rettv->vval.v_list,
15547 						wp->w_buffer->b_fnum) == FAIL)
15548 		    break;
15549 	}
15550     }
15551 #endif
15552 }
15553 
15554 
15555 /*
15556  * "tabpagenr()" function
15557  */
15558 /* ARGSUSED */
15559     static void
15560 f_tabpagenr(argvars, rettv)
15561     typval_T	*argvars;
15562     typval_T	*rettv;
15563 {
15564     int		nr = 1;
15565 #ifdef FEAT_WINDOWS
15566     char_u	*arg;
15567 
15568     if (argvars[0].v_type != VAR_UNKNOWN)
15569     {
15570 	arg = get_tv_string_chk(&argvars[0]);
15571 	nr = 0;
15572 	if (arg != NULL)
15573 	{
15574 	    if (STRCMP(arg, "$") == 0)
15575 		nr = tabpage_index(NULL) - 1;
15576 	    else
15577 		EMSG2(_(e_invexpr2), arg);
15578 	}
15579     }
15580     else
15581 	nr = tabpage_index(curtab);
15582 #endif
15583     rettv->vval.v_number = nr;
15584 }
15585 
15586 
15587 #ifdef FEAT_WINDOWS
15588 static int get_winnr __ARGS((tabpage_T *tp, typval_T *argvar));
15589 
15590 /*
15591  * Common code for tabpagewinnr() and winnr().
15592  */
15593     static int
15594 get_winnr(tp, argvar)
15595     tabpage_T	*tp;
15596     typval_T	*argvar;
15597 {
15598     win_T	*twin;
15599     int		nr = 1;
15600     win_T	*wp;
15601     char_u	*arg;
15602 
15603     twin = (tp == curtab) ? curwin : tp->tp_curwin;
15604     if (argvar->v_type != VAR_UNKNOWN)
15605     {
15606 	arg = get_tv_string_chk(argvar);
15607 	if (arg == NULL)
15608 	    nr = 0;		/* type error; errmsg already given */
15609 	else if (STRCMP(arg, "$") == 0)
15610 	    twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
15611 	else if (STRCMP(arg, "#") == 0)
15612 	{
15613 	    twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
15614 	    if (twin == NULL)
15615 		nr = 0;
15616 	}
15617 	else
15618 	{
15619 	    EMSG2(_(e_invexpr2), arg);
15620 	    nr = 0;
15621 	}
15622     }
15623 
15624     if (nr > 0)
15625 	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15626 					      wp != twin; wp = wp->w_next)
15627 	    ++nr;
15628     return nr;
15629 }
15630 #endif
15631 
15632 /*
15633  * "tabpagewinnr()" function
15634  */
15635 /* ARGSUSED */
15636     static void
15637 f_tabpagewinnr(argvars, rettv)
15638     typval_T	*argvars;
15639     typval_T	*rettv;
15640 {
15641     int		nr = 1;
15642 #ifdef FEAT_WINDOWS
15643     tabpage_T	*tp;
15644 
15645     tp = find_tabpage((int)get_tv_number(&argvars[0]));
15646     if (tp == NULL)
15647 	nr = 0;
15648     else
15649 	nr = get_winnr(tp, &argvars[1]);
15650 #endif
15651     rettv->vval.v_number = nr;
15652 }
15653 
15654 
15655 /*
15656  * "tagfiles()" function
15657  */
15658 /*ARGSUSED*/
15659     static void
15660 f_tagfiles(argvars, rettv)
15661     typval_T	*argvars;
15662     typval_T	*rettv;
15663 {
15664     char_u	fname[MAXPATHL + 1];
15665     tagname_T	tn;
15666     int		first;
15667 
15668     if (rettv_list_alloc(rettv) == FAIL)
15669     {
15670 	rettv->vval.v_number = 0;
15671 	return;
15672     }
15673 
15674     for (first = TRUE; ; first = FALSE)
15675 	if (get_tagfname(&tn, first, fname) == FAIL
15676 		|| list_append_string(rettv->vval.v_list, fname, -1) == FAIL)
15677 	    break;
15678     tagname_free(&tn);
15679 }
15680 
15681 /*
15682  * "taglist()" function
15683  */
15684     static void
15685 f_taglist(argvars, rettv)
15686     typval_T  *argvars;
15687     typval_T  *rettv;
15688 {
15689     char_u  *tag_pattern;
15690 
15691     tag_pattern = get_tv_string(&argvars[0]);
15692 
15693     rettv->vval.v_number = FALSE;
15694     if (*tag_pattern == NUL)
15695 	return;
15696 
15697     if (rettv_list_alloc(rettv) == OK)
15698 	(void)get_tags(rettv->vval.v_list, tag_pattern);
15699 }
15700 
15701 /*
15702  * "tempname()" function
15703  */
15704 /*ARGSUSED*/
15705     static void
15706 f_tempname(argvars, rettv)
15707     typval_T	*argvars;
15708     typval_T	*rettv;
15709 {
15710     static int	x = 'A';
15711 
15712     rettv->v_type = VAR_STRING;
15713     rettv->vval.v_string = vim_tempname(x);
15714 
15715     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
15716      * names.  Skip 'I' and 'O', they are used for shell redirection. */
15717     do
15718     {
15719 	if (x == 'Z')
15720 	    x = '0';
15721 	else if (x == '9')
15722 	    x = 'A';
15723 	else
15724 	{
15725 #ifdef EBCDIC
15726 	    if (x == 'I')
15727 		x = 'J';
15728 	    else if (x == 'R')
15729 		x = 'S';
15730 	    else
15731 #endif
15732 		++x;
15733 	}
15734     } while (x == 'I' || x == 'O');
15735 }
15736 
15737 /*
15738  * "test(list)" function: Just checking the walls...
15739  */
15740 /*ARGSUSED*/
15741     static void
15742 f_test(argvars, rettv)
15743     typval_T	*argvars;
15744     typval_T	*rettv;
15745 {
15746     /* Used for unit testing.  Change the code below to your liking. */
15747 #if 0
15748     listitem_T	*li;
15749     list_T	*l;
15750     char_u	*bad, *good;
15751 
15752     if (argvars[0].v_type != VAR_LIST)
15753 	return;
15754     l = argvars[0].vval.v_list;
15755     if (l == NULL)
15756 	return;
15757     li = l->lv_first;
15758     if (li == NULL)
15759 	return;
15760     bad = get_tv_string(&li->li_tv);
15761     li = li->li_next;
15762     if (li == NULL)
15763 	return;
15764     good = get_tv_string(&li->li_tv);
15765     rettv->vval.v_number = test_edit_score(bad, good);
15766 #endif
15767 }
15768 
15769 /*
15770  * "tolower(string)" function
15771  */
15772     static void
15773 f_tolower(argvars, rettv)
15774     typval_T	*argvars;
15775     typval_T	*rettv;
15776 {
15777     char_u	*p;
15778 
15779     p = vim_strsave(get_tv_string(&argvars[0]));
15780     rettv->v_type = VAR_STRING;
15781     rettv->vval.v_string = p;
15782 
15783     if (p != NULL)
15784 	while (*p != NUL)
15785 	{
15786 #ifdef FEAT_MBYTE
15787 	    int		l;
15788 
15789 	    if (enc_utf8)
15790 	    {
15791 		int c, lc;
15792 
15793 		c = utf_ptr2char(p);
15794 		lc = utf_tolower(c);
15795 		l = utf_ptr2len(p);
15796 		/* TODO: reallocate string when byte count changes. */
15797 		if (utf_char2len(lc) == l)
15798 		    utf_char2bytes(lc, p);
15799 		p += l;
15800 	    }
15801 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
15802 		p += l;		/* skip multi-byte character */
15803 	    else
15804 #endif
15805 	    {
15806 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
15807 		++p;
15808 	    }
15809 	}
15810 }
15811 
15812 /*
15813  * "toupper(string)" function
15814  */
15815     static void
15816 f_toupper(argvars, rettv)
15817     typval_T	*argvars;
15818     typval_T	*rettv;
15819 {
15820     rettv->v_type = VAR_STRING;
15821     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
15822 }
15823 
15824 /*
15825  * "tr(string, fromstr, tostr)" function
15826  */
15827     static void
15828 f_tr(argvars, rettv)
15829     typval_T	*argvars;
15830     typval_T	*rettv;
15831 {
15832     char_u	*instr;
15833     char_u	*fromstr;
15834     char_u	*tostr;
15835     char_u	*p;
15836 #ifdef FEAT_MBYTE
15837     int		inlen;
15838     int		fromlen;
15839     int		tolen;
15840     int		idx;
15841     char_u	*cpstr;
15842     int		cplen;
15843     int		first = TRUE;
15844 #endif
15845     char_u	buf[NUMBUFLEN];
15846     char_u	buf2[NUMBUFLEN];
15847     garray_T	ga;
15848 
15849     instr = get_tv_string(&argvars[0]);
15850     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
15851     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
15852 
15853     /* Default return value: empty string. */
15854     rettv->v_type = VAR_STRING;
15855     rettv->vval.v_string = NULL;
15856     if (fromstr == NULL || tostr == NULL)
15857 	    return;		/* type error; errmsg already given */
15858     ga_init2(&ga, (int)sizeof(char), 80);
15859 
15860 #ifdef FEAT_MBYTE
15861     if (!has_mbyte)
15862 #endif
15863 	/* not multi-byte: fromstr and tostr must be the same length */
15864 	if (STRLEN(fromstr) != STRLEN(tostr))
15865 	{
15866 #ifdef FEAT_MBYTE
15867 error:
15868 #endif
15869 	    EMSG2(_(e_invarg2), fromstr);
15870 	    ga_clear(&ga);
15871 	    return;
15872 	}
15873 
15874     /* fromstr and tostr have to contain the same number of chars */
15875     while (*instr != NUL)
15876     {
15877 #ifdef FEAT_MBYTE
15878 	if (has_mbyte)
15879 	{
15880 	    inlen = (*mb_ptr2len)(instr);
15881 	    cpstr = instr;
15882 	    cplen = inlen;
15883 	    idx = 0;
15884 	    for (p = fromstr; *p != NUL; p += fromlen)
15885 	    {
15886 		fromlen = (*mb_ptr2len)(p);
15887 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
15888 		{
15889 		    for (p = tostr; *p != NUL; p += tolen)
15890 		    {
15891 			tolen = (*mb_ptr2len)(p);
15892 			if (idx-- == 0)
15893 			{
15894 			    cplen = tolen;
15895 			    cpstr = p;
15896 			    break;
15897 			}
15898 		    }
15899 		    if (*p == NUL)	/* tostr is shorter than fromstr */
15900 			goto error;
15901 		    break;
15902 		}
15903 		++idx;
15904 	    }
15905 
15906 	    if (first && cpstr == instr)
15907 	    {
15908 		/* Check that fromstr and tostr have the same number of
15909 		 * (multi-byte) characters.  Done only once when a character
15910 		 * of instr doesn't appear in fromstr. */
15911 		first = FALSE;
15912 		for (p = tostr; *p != NUL; p += tolen)
15913 		{
15914 		    tolen = (*mb_ptr2len)(p);
15915 		    --idx;
15916 		}
15917 		if (idx != 0)
15918 		    goto error;
15919 	    }
15920 
15921 	    ga_grow(&ga, cplen);
15922 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
15923 	    ga.ga_len += cplen;
15924 
15925 	    instr += inlen;
15926 	}
15927 	else
15928 #endif
15929 	{
15930 	    /* When not using multi-byte chars we can do it faster. */
15931 	    p = vim_strchr(fromstr, *instr);
15932 	    if (p != NULL)
15933 		ga_append(&ga, tostr[p - fromstr]);
15934 	    else
15935 		ga_append(&ga, *instr);
15936 	    ++instr;
15937 	}
15938     }
15939 
15940     rettv->vval.v_string = ga.ga_data;
15941 }
15942 
15943 /*
15944  * "type(expr)" function
15945  */
15946     static void
15947 f_type(argvars, rettv)
15948     typval_T	*argvars;
15949     typval_T	*rettv;
15950 {
15951     int n;
15952 
15953     switch (argvars[0].v_type)
15954     {
15955 	case VAR_NUMBER: n = 0; break;
15956 	case VAR_STRING: n = 1; break;
15957 	case VAR_FUNC:   n = 2; break;
15958 	case VAR_LIST:   n = 3; break;
15959 	case VAR_DICT:   n = 4; break;
15960 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
15961     }
15962     rettv->vval.v_number = n;
15963 }
15964 
15965 /*
15966  * "values(dict)" function
15967  */
15968     static void
15969 f_values(argvars, rettv)
15970     typval_T	*argvars;
15971     typval_T	*rettv;
15972 {
15973     dict_list(argvars, rettv, 1);
15974 }
15975 
15976 /*
15977  * "virtcol(string)" function
15978  */
15979     static void
15980 f_virtcol(argvars, rettv)
15981     typval_T	*argvars;
15982     typval_T	*rettv;
15983 {
15984     colnr_T	vcol = 0;
15985     pos_T	*fp;
15986     int		fnum = curbuf->b_fnum;
15987 
15988     fp = var2fpos(&argvars[0], FALSE, &fnum);
15989     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count
15990 						    && fnum == curbuf->b_fnum)
15991     {
15992 	getvvcol(curwin, fp, NULL, NULL, &vcol);
15993 	++vcol;
15994     }
15995 
15996     rettv->vval.v_number = vcol;
15997 }
15998 
15999 /*
16000  * "visualmode()" function
16001  */
16002 /*ARGSUSED*/
16003     static void
16004 f_visualmode(argvars, rettv)
16005     typval_T	*argvars;
16006     typval_T	*rettv;
16007 {
16008 #ifdef FEAT_VISUAL
16009     char_u	str[2];
16010 
16011     rettv->v_type = VAR_STRING;
16012     str[0] = curbuf->b_visual_mode_eval;
16013     str[1] = NUL;
16014     rettv->vval.v_string = vim_strsave(str);
16015 
16016     /* A non-zero number or non-empty string argument: reset mode. */
16017     if ((argvars[0].v_type == VAR_NUMBER
16018 		&& argvars[0].vval.v_number != 0)
16019 	    || (argvars[0].v_type == VAR_STRING
16020 		&& *get_tv_string(&argvars[0]) != NUL))
16021 	curbuf->b_visual_mode_eval = NUL;
16022 #else
16023     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
16024 #endif
16025 }
16026 
16027 /*
16028  * "winbufnr(nr)" function
16029  */
16030     static void
16031 f_winbufnr(argvars, rettv)
16032     typval_T	*argvars;
16033     typval_T	*rettv;
16034 {
16035     win_T	*wp;
16036 
16037     wp = find_win_by_nr(&argvars[0], NULL);
16038     if (wp == NULL)
16039 	rettv->vval.v_number = -1;
16040     else
16041 	rettv->vval.v_number = wp->w_buffer->b_fnum;
16042 }
16043 
16044 /*
16045  * "wincol()" function
16046  */
16047 /*ARGSUSED*/
16048     static void
16049 f_wincol(argvars, rettv)
16050     typval_T	*argvars;
16051     typval_T	*rettv;
16052 {
16053     validate_cursor();
16054     rettv->vval.v_number = curwin->w_wcol + 1;
16055 }
16056 
16057 /*
16058  * "winheight(nr)" function
16059  */
16060     static void
16061 f_winheight(argvars, rettv)
16062     typval_T	*argvars;
16063     typval_T	*rettv;
16064 {
16065     win_T	*wp;
16066 
16067     wp = find_win_by_nr(&argvars[0], NULL);
16068     if (wp == NULL)
16069 	rettv->vval.v_number = -1;
16070     else
16071 	rettv->vval.v_number = wp->w_height;
16072 }
16073 
16074 /*
16075  * "winline()" function
16076  */
16077 /*ARGSUSED*/
16078     static void
16079 f_winline(argvars, rettv)
16080     typval_T	*argvars;
16081     typval_T	*rettv;
16082 {
16083     validate_cursor();
16084     rettv->vval.v_number = curwin->w_wrow + 1;
16085 }
16086 
16087 /*
16088  * "winnr()" function
16089  */
16090 /* ARGSUSED */
16091     static void
16092 f_winnr(argvars, rettv)
16093     typval_T	*argvars;
16094     typval_T	*rettv;
16095 {
16096     int		nr = 1;
16097 
16098 #ifdef FEAT_WINDOWS
16099     nr = get_winnr(curtab, &argvars[0]);
16100 #endif
16101     rettv->vval.v_number = nr;
16102 }
16103 
16104 /*
16105  * "winrestcmd()" function
16106  */
16107 /* ARGSUSED */
16108     static void
16109 f_winrestcmd(argvars, rettv)
16110     typval_T	*argvars;
16111     typval_T	*rettv;
16112 {
16113 #ifdef FEAT_WINDOWS
16114     win_T	*wp;
16115     int		winnr = 1;
16116     garray_T	ga;
16117     char_u	buf[50];
16118 
16119     ga_init2(&ga, (int)sizeof(char), 70);
16120     for (wp = firstwin; wp != NULL; wp = wp->w_next)
16121     {
16122 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
16123 	ga_concat(&ga, buf);
16124 # ifdef FEAT_VERTSPLIT
16125 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
16126 	ga_concat(&ga, buf);
16127 # endif
16128 	++winnr;
16129     }
16130     ga_append(&ga, NUL);
16131 
16132     rettv->vval.v_string = ga.ga_data;
16133 #else
16134     rettv->vval.v_string = NULL;
16135 #endif
16136     rettv->v_type = VAR_STRING;
16137 }
16138 
16139 /*
16140  * "winrestview()" function
16141  */
16142 /* ARGSUSED */
16143     static void
16144 f_winrestview(argvars, rettv)
16145     typval_T	*argvars;
16146     typval_T	*rettv;
16147 {
16148     dict_T	*dict;
16149 
16150     if (argvars[0].v_type != VAR_DICT
16151 	    || (dict = argvars[0].vval.v_dict) == NULL)
16152 	EMSG(_(e_invarg));
16153     else
16154     {
16155 	curwin->w_cursor.lnum = get_dict_number(dict, (char_u *)"lnum");
16156 	curwin->w_cursor.col = get_dict_number(dict, (char_u *)"col");
16157 #ifdef FEAT_VIRTUALEDIT
16158 	curwin->w_cursor.coladd = get_dict_number(dict, (char_u *)"coladd");
16159 #endif
16160 	curwin->w_curswant = get_dict_number(dict, (char_u *)"curswant");
16161 	curwin->w_set_curswant = FALSE;
16162 
16163 	curwin->w_topline = get_dict_number(dict, (char_u *)"topline");
16164 #ifdef FEAT_DIFF
16165 	curwin->w_topfill = get_dict_number(dict, (char_u *)"topfill");
16166 #endif
16167 	curwin->w_leftcol = get_dict_number(dict, (char_u *)"leftcol");
16168 	curwin->w_skipcol = get_dict_number(dict, (char_u *)"skipcol");
16169 
16170 	check_cursor();
16171 	changed_cline_bef_curs();
16172 	invalidate_botline();
16173 	redraw_later(VALID);
16174 
16175 	if (curwin->w_topline == 0)
16176 	    curwin->w_topline = 1;
16177 	if (curwin->w_topline > curbuf->b_ml.ml_line_count)
16178 	    curwin->w_topline = curbuf->b_ml.ml_line_count;
16179 #ifdef FEAT_DIFF
16180 	check_topfill(curwin, TRUE);
16181 #endif
16182     }
16183 }
16184 
16185 /*
16186  * "winsaveview()" function
16187  */
16188 /* ARGSUSED */
16189     static void
16190 f_winsaveview(argvars, rettv)
16191     typval_T	*argvars;
16192     typval_T	*rettv;
16193 {
16194     dict_T	*dict;
16195 
16196     dict = dict_alloc();
16197     if (dict == NULL)
16198 	return;
16199     rettv->v_type = VAR_DICT;
16200     rettv->vval.v_dict = dict;
16201     ++dict->dv_refcount;
16202 
16203     dict_add_nr_str(dict, "lnum", (long)curwin->w_cursor.lnum, NULL);
16204     dict_add_nr_str(dict, "col", (long)curwin->w_cursor.col, NULL);
16205 #ifdef FEAT_VIRTUALEDIT
16206     dict_add_nr_str(dict, "coladd", (long)curwin->w_cursor.coladd, NULL);
16207 #endif
16208     dict_add_nr_str(dict, "curswant", (long)curwin->w_curswant, NULL);
16209 
16210     dict_add_nr_str(dict, "topline", (long)curwin->w_topline, NULL);
16211 #ifdef FEAT_DIFF
16212     dict_add_nr_str(dict, "topfill", (long)curwin->w_topfill, NULL);
16213 #endif
16214     dict_add_nr_str(dict, "leftcol", (long)curwin->w_leftcol, NULL);
16215     dict_add_nr_str(dict, "skipcol", (long)curwin->w_skipcol, NULL);
16216 }
16217 
16218 /*
16219  * "winwidth(nr)" function
16220  */
16221     static void
16222 f_winwidth(argvars, rettv)
16223     typval_T	*argvars;
16224     typval_T	*rettv;
16225 {
16226     win_T	*wp;
16227 
16228     wp = find_win_by_nr(&argvars[0], NULL);
16229     if (wp == NULL)
16230 	rettv->vval.v_number = -1;
16231     else
16232 #ifdef FEAT_VERTSPLIT
16233 	rettv->vval.v_number = wp->w_width;
16234 #else
16235 	rettv->vval.v_number = Columns;
16236 #endif
16237 }
16238 
16239 /*
16240  * "writefile()" function
16241  */
16242     static void
16243 f_writefile(argvars, rettv)
16244     typval_T	*argvars;
16245     typval_T	*rettv;
16246 {
16247     int		binary = FALSE;
16248     char_u	*fname;
16249     FILE	*fd;
16250     listitem_T	*li;
16251     char_u	*s;
16252     int		ret = 0;
16253     int		c;
16254 
16255     if (argvars[0].v_type != VAR_LIST)
16256     {
16257 	EMSG2(_(e_listarg), "writefile()");
16258 	return;
16259     }
16260     if (argvars[0].vval.v_list == NULL)
16261 	return;
16262 
16263     if (argvars[2].v_type != VAR_UNKNOWN
16264 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
16265 	binary = TRUE;
16266 
16267     /* Always open the file in binary mode, library functions have a mind of
16268      * their own about CR-LF conversion. */
16269     fname = get_tv_string(&argvars[1]);
16270     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
16271     {
16272 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
16273 	ret = -1;
16274     }
16275     else
16276     {
16277 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
16278 							     li = li->li_next)
16279 	{
16280 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
16281 	    {
16282 		if (*s == '\n')
16283 		    c = putc(NUL, fd);
16284 		else
16285 		    c = putc(*s, fd);
16286 		if (c == EOF)
16287 		{
16288 		    ret = -1;
16289 		    break;
16290 		}
16291 	    }
16292 	    if (!binary || li->li_next != NULL)
16293 		if (putc('\n', fd) == EOF)
16294 		{
16295 		    ret = -1;
16296 		    break;
16297 		}
16298 	    if (ret < 0)
16299 	    {
16300 		EMSG(_(e_write));
16301 		break;
16302 	    }
16303 	}
16304 	fclose(fd);
16305     }
16306 
16307     rettv->vval.v_number = ret;
16308 }
16309 
16310 /*
16311  * Translate a String variable into a position.
16312  * Returns NULL when there is an error.
16313  */
16314     static pos_T *
16315 var2fpos(varp, lnum, fnum)
16316     typval_T	*varp;
16317     int		lnum;		/* TRUE when $ is last line */
16318     int		*fnum;		/* set to fnum for '0, 'A, etc. */
16319 {
16320     char_u		*name;
16321     static pos_T	pos;
16322     pos_T		*pp;
16323 
16324     /* Argument can be [lnum, col, coladd]. */
16325     if (varp->v_type == VAR_LIST)
16326     {
16327 	list_T		*l;
16328 	int		len;
16329 	int		error = FALSE;
16330 
16331 	l = varp->vval.v_list;
16332 	if (l == NULL)
16333 	    return NULL;
16334 
16335 	/* Get the line number */
16336 	pos.lnum = list_find_nr(l, 0L, &error);
16337 	if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
16338 	    return NULL;	/* invalid line number */
16339 
16340 	/* Get the column number */
16341 	pos.col = list_find_nr(l, 1L, &error);
16342 	if (error)
16343 	    return NULL;
16344 	len = (long)STRLEN(ml_get(pos.lnum));
16345 	/* Accept a position up to the NUL after the line. */
16346 	if (pos.col == 0 || (int)pos.col > len + 1)
16347 	    return NULL;	/* invalid column number */
16348 	--pos.col;
16349 
16350 #ifdef FEAT_VIRTUALEDIT
16351 	/* Get the virtual offset.  Defaults to zero. */
16352 	pos.coladd = list_find_nr(l, 2L, &error);
16353 	if (error)
16354 	    pos.coladd = 0;
16355 #endif
16356 
16357 	return &pos;
16358     }
16359 
16360     name = get_tv_string_chk(varp);
16361     if (name == NULL)
16362 	return NULL;
16363     if (name[0] == '.')		/* cursor */
16364 	return &curwin->w_cursor;
16365     if (name[0] == '\'')	/* mark */
16366     {
16367 	pp = getmark_fnum(name[1], FALSE, fnum);
16368 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
16369 	    return NULL;
16370 	return pp;
16371     }
16372 
16373 #ifdef FEAT_VIRTUALEDIT
16374     pos.coladd = 0;
16375 #endif
16376 
16377     if (name[0] == 'w' && lnum)
16378     {
16379 	pos.col = 0;
16380 	if (name[1] == '0')		/* "w0": first visible line */
16381 	{
16382 	    update_topline();
16383 	    pos.lnum = curwin->w_topline;
16384 	    return &pos;
16385 	}
16386 	else if (name[1] == '$')	/* "w$": last visible line */
16387 	{
16388 	    validate_botline();
16389 	    pos.lnum = curwin->w_botline - 1;
16390 	    return &pos;
16391 	}
16392     }
16393     else if (name[0] == '$')		/* last column or line */
16394     {
16395 	if (lnum)
16396 	{
16397 	    pos.lnum = curbuf->b_ml.ml_line_count;
16398 	    pos.col = 0;
16399 	}
16400 	else
16401 	{
16402 	    pos.lnum = curwin->w_cursor.lnum;
16403 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
16404 	}
16405 	return &pos;
16406     }
16407     return NULL;
16408 }
16409 
16410 /*
16411  * Convert list in "arg" into a position and optional file number.
16412  * When "fnump" is NULL there is no file number, only 3 items.
16413  * Note that the column is passed on as-is, the caller may want to decrement
16414  * it to use 1 for the first column.
16415  * Return FAIL when conversion is not possible, doesn't check the position for
16416  * validity.
16417  */
16418     static int
16419 list2fpos(arg, posp, fnump)
16420     typval_T	*arg;
16421     pos_T	*posp;
16422     int		*fnump;
16423 {
16424     list_T	*l = arg->vval.v_list;
16425     long	i = 0;
16426     long	n;
16427 
16428     /* List must be: [fnum, lnum, col, coladd] */
16429     if (arg->v_type != VAR_LIST || l == NULL
16430 				      || l->lv_len != (fnump == NULL ? 3 : 4))
16431 	return FAIL;
16432 
16433     if (fnump != NULL)
16434     {
16435 	n = list_find_nr(l, i++, NULL);	/* fnum */
16436 	if (n < 0)
16437 	    return FAIL;
16438 	if (n == 0)
16439 	    n = curbuf->b_fnum;		/* current buffer */
16440 	*fnump = n;
16441     }
16442 
16443     n = list_find_nr(l, i++, NULL);	/* lnum */
16444     if (n < 0)
16445 	return FAIL;
16446     posp->lnum = n;
16447 
16448     n = list_find_nr(l, i++, NULL);	/* col */
16449     if (n < 0)
16450 	return FAIL;
16451     posp->col = n;
16452 
16453 #ifdef FEAT_VIRTUALEDIT
16454     n = list_find_nr(l, i, NULL);
16455     if (n < 0)
16456 	return FAIL;
16457     posp->coladd = n;
16458 #endif
16459 
16460     return OK;
16461 }
16462 
16463 /*
16464  * Get the length of an environment variable name.
16465  * Advance "arg" to the first character after the name.
16466  * Return 0 for error.
16467  */
16468     static int
16469 get_env_len(arg)
16470     char_u	**arg;
16471 {
16472     char_u	*p;
16473     int		len;
16474 
16475     for (p = *arg; vim_isIDc(*p); ++p)
16476 	;
16477     if (p == *arg)	    /* no name found */
16478 	return 0;
16479 
16480     len = (int)(p - *arg);
16481     *arg = p;
16482     return len;
16483 }
16484 
16485 /*
16486  * Get the length of the name of a function or internal variable.
16487  * "arg" is advanced to the first non-white character after the name.
16488  * Return 0 if something is wrong.
16489  */
16490     static int
16491 get_id_len(arg)
16492     char_u	**arg;
16493 {
16494     char_u	*p;
16495     int		len;
16496 
16497     /* Find the end of the name. */
16498     for (p = *arg; eval_isnamec(*p); ++p)
16499 	;
16500     if (p == *arg)	    /* no name found */
16501 	return 0;
16502 
16503     len = (int)(p - *arg);
16504     *arg = skipwhite(p);
16505 
16506     return len;
16507 }
16508 
16509 /*
16510  * Get the length of the name of a variable or function.
16511  * Only the name is recognized, does not handle ".key" or "[idx]".
16512  * "arg" is advanced to the first non-white character after the name.
16513  * Return -1 if curly braces expansion failed.
16514  * Return 0 if something else is wrong.
16515  * If the name contains 'magic' {}'s, expand them and return the
16516  * expanded name in an allocated string via 'alias' - caller must free.
16517  */
16518     static int
16519 get_name_len(arg, alias, evaluate, verbose)
16520     char_u	**arg;
16521     char_u	**alias;
16522     int		evaluate;
16523     int		verbose;
16524 {
16525     int		len;
16526     char_u	*p;
16527     char_u	*expr_start;
16528     char_u	*expr_end;
16529 
16530     *alias = NULL;  /* default to no alias */
16531 
16532     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
16533 						  && (*arg)[2] == (int)KE_SNR)
16534     {
16535 	/* hard coded <SNR>, already translated */
16536 	*arg += 3;
16537 	return get_id_len(arg) + 3;
16538     }
16539     len = eval_fname_script(*arg);
16540     if (len > 0)
16541     {
16542 	/* literal "<SID>", "s:" or "<SNR>" */
16543 	*arg += len;
16544     }
16545 
16546     /*
16547      * Find the end of the name; check for {} construction.
16548      */
16549     p = find_name_end(*arg, &expr_start, &expr_end,
16550 					       len > 0 ? 0 : FNE_CHECK_START);
16551     if (expr_start != NULL)
16552     {
16553 	char_u	*temp_string;
16554 
16555 	if (!evaluate)
16556 	{
16557 	    len += (int)(p - *arg);
16558 	    *arg = skipwhite(p);
16559 	    return len;
16560 	}
16561 
16562 	/*
16563 	 * Include any <SID> etc in the expanded string:
16564 	 * Thus the -len here.
16565 	 */
16566 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
16567 	if (temp_string == NULL)
16568 	    return -1;
16569 	*alias = temp_string;
16570 	*arg = skipwhite(p);
16571 	return (int)STRLEN(temp_string);
16572     }
16573 
16574     len += get_id_len(arg);
16575     if (len == 0 && verbose)
16576 	EMSG2(_(e_invexpr2), *arg);
16577 
16578     return len;
16579 }
16580 
16581 /*
16582  * Find the end of a variable or function name, taking care of magic braces.
16583  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
16584  * start and end of the first magic braces item.
16585  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
16586  * Return a pointer to just after the name.  Equal to "arg" if there is no
16587  * valid name.
16588  */
16589     static char_u *
16590 find_name_end(arg, expr_start, expr_end, flags)
16591     char_u	*arg;
16592     char_u	**expr_start;
16593     char_u	**expr_end;
16594     int		flags;
16595 {
16596     int		mb_nest = 0;
16597     int		br_nest = 0;
16598     char_u	*p;
16599 
16600     if (expr_start != NULL)
16601     {
16602 	*expr_start = NULL;
16603 	*expr_end = NULL;
16604     }
16605 
16606     /* Quick check for valid starting character. */
16607     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
16608 	return arg;
16609 
16610     for (p = arg; *p != NUL
16611 		    && (eval_isnamec(*p)
16612 			|| *p == '{'
16613 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
16614 			|| mb_nest != 0
16615 			|| br_nest != 0); mb_ptr_adv(p))
16616     {
16617 	if (*p == '\'')
16618 	{
16619 	    /* skip over 'string' to avoid counting [ and ] inside it. */
16620 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
16621 		;
16622 	    if (*p == NUL)
16623 		break;
16624 	}
16625 	else if (*p == '"')
16626 	{
16627 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
16628 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
16629 		if (*p == '\\' && p[1] != NUL)
16630 		    ++p;
16631 	    if (*p == NUL)
16632 		break;
16633 	}
16634 
16635 	if (mb_nest == 0)
16636 	{
16637 	    if (*p == '[')
16638 		++br_nest;
16639 	    else if (*p == ']')
16640 		--br_nest;
16641 	}
16642 
16643 	if (br_nest == 0)
16644 	{
16645 	    if (*p == '{')
16646 	    {
16647 		mb_nest++;
16648 		if (expr_start != NULL && *expr_start == NULL)
16649 		    *expr_start = p;
16650 	    }
16651 	    else if (*p == '}')
16652 	    {
16653 		mb_nest--;
16654 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
16655 		    *expr_end = p;
16656 	    }
16657 	}
16658     }
16659 
16660     return p;
16661 }
16662 
16663 /*
16664  * Expands out the 'magic' {}'s in a variable/function name.
16665  * Note that this can call itself recursively, to deal with
16666  * constructs like foo{bar}{baz}{bam}
16667  * The four pointer arguments point to "foo{expre}ss{ion}bar"
16668  *			"in_start"      ^
16669  *			"expr_start"	   ^
16670  *			"expr_end"		 ^
16671  *			"in_end"			    ^
16672  *
16673  * Returns a new allocated string, which the caller must free.
16674  * Returns NULL for failure.
16675  */
16676     static char_u *
16677 make_expanded_name(in_start, expr_start, expr_end, in_end)
16678     char_u	*in_start;
16679     char_u	*expr_start;
16680     char_u	*expr_end;
16681     char_u	*in_end;
16682 {
16683     char_u	c1;
16684     char_u	*retval = NULL;
16685     char_u	*temp_result;
16686     char_u	*nextcmd = NULL;
16687 
16688     if (expr_end == NULL || in_end == NULL)
16689 	return NULL;
16690     *expr_start	= NUL;
16691     *expr_end = NUL;
16692     c1 = *in_end;
16693     *in_end = NUL;
16694 
16695     temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
16696     if (temp_result != NULL && nextcmd == NULL)
16697     {
16698 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
16699 						   + (in_end - expr_end) + 1));
16700 	if (retval != NULL)
16701 	{
16702 	    STRCPY(retval, in_start);
16703 	    STRCAT(retval, temp_result);
16704 	    STRCAT(retval, expr_end + 1);
16705 	}
16706     }
16707     vim_free(temp_result);
16708 
16709     *in_end = c1;		/* put char back for error messages */
16710     *expr_start = '{';
16711     *expr_end = '}';
16712 
16713     if (retval != NULL)
16714     {
16715 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
16716 	if (expr_start != NULL)
16717 	{
16718 	    /* Further expansion! */
16719 	    temp_result = make_expanded_name(retval, expr_start,
16720 						       expr_end, temp_result);
16721 	    vim_free(retval);
16722 	    retval = temp_result;
16723 	}
16724     }
16725 
16726     return retval;
16727 }
16728 
16729 /*
16730  * Return TRUE if character "c" can be used in a variable or function name.
16731  * Does not include '{' or '}' for magic braces.
16732  */
16733     static int
16734 eval_isnamec(c)
16735     int	    c;
16736 {
16737     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
16738 }
16739 
16740 /*
16741  * Return TRUE if character "c" can be used as the first character in a
16742  * variable or function name (excluding '{' and '}').
16743  */
16744     static int
16745 eval_isnamec1(c)
16746     int	    c;
16747 {
16748     return (ASCII_ISALPHA(c) || c == '_');
16749 }
16750 
16751 /*
16752  * Set number v: variable to "val".
16753  */
16754     void
16755 set_vim_var_nr(idx, val)
16756     int		idx;
16757     long	val;
16758 {
16759     vimvars[idx].vv_nr = val;
16760 }
16761 
16762 /*
16763  * Get number v: variable value.
16764  */
16765     long
16766 get_vim_var_nr(idx)
16767     int		idx;
16768 {
16769     return vimvars[idx].vv_nr;
16770 }
16771 
16772 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16773 /*
16774  * Get string v: variable value.  Uses a static buffer, can only be used once.
16775  */
16776     char_u *
16777 get_vim_var_str(idx)
16778     int		idx;
16779 {
16780     return get_tv_string(&vimvars[idx].vv_tv);
16781 }
16782 #endif
16783 
16784 /*
16785  * Set v:count, v:count1 and v:prevcount.
16786  */
16787     void
16788 set_vcount(count, count1)
16789     long	count;
16790     long	count1;
16791 {
16792     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
16793     vimvars[VV_COUNT].vv_nr = count;
16794     vimvars[VV_COUNT1].vv_nr = count1;
16795 }
16796 
16797 /*
16798  * Set string v: variable to a copy of "val".
16799  */
16800     void
16801 set_vim_var_string(idx, val, len)
16802     int		idx;
16803     char_u	*val;
16804     int		len;	    /* length of "val" to use or -1 (whole string) */
16805 {
16806     /* Need to do this (at least) once, since we can't initialize a union.
16807      * Will always be invoked when "v:progname" is set. */
16808     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
16809 
16810     vim_free(vimvars[idx].vv_str);
16811     if (val == NULL)
16812 	vimvars[idx].vv_str = NULL;
16813     else if (len == -1)
16814 	vimvars[idx].vv_str = vim_strsave(val);
16815     else
16816 	vimvars[idx].vv_str = vim_strnsave(val, len);
16817 }
16818 
16819 /*
16820  * Set v:register if needed.
16821  */
16822     void
16823 set_reg_var(c)
16824     int		c;
16825 {
16826     char_u	regname;
16827 
16828     if (c == 0 || c == ' ')
16829 	regname = '"';
16830     else
16831 	regname = c;
16832     /* Avoid free/alloc when the value is already right. */
16833     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
16834 	set_vim_var_string(VV_REG, &regname, 1);
16835 }
16836 
16837 /*
16838  * Get or set v:exception.  If "oldval" == NULL, return the current value.
16839  * Otherwise, restore the value to "oldval" and return NULL.
16840  * Must always be called in pairs to save and restore v:exception!  Does not
16841  * take care of memory allocations.
16842  */
16843     char_u *
16844 v_exception(oldval)
16845     char_u	*oldval;
16846 {
16847     if (oldval == NULL)
16848 	return vimvars[VV_EXCEPTION].vv_str;
16849 
16850     vimvars[VV_EXCEPTION].vv_str = oldval;
16851     return NULL;
16852 }
16853 
16854 /*
16855  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
16856  * Otherwise, restore the value to "oldval" and return NULL.
16857  * Must always be called in pairs to save and restore v:throwpoint!  Does not
16858  * take care of memory allocations.
16859  */
16860     char_u *
16861 v_throwpoint(oldval)
16862     char_u	*oldval;
16863 {
16864     if (oldval == NULL)
16865 	return vimvars[VV_THROWPOINT].vv_str;
16866 
16867     vimvars[VV_THROWPOINT].vv_str = oldval;
16868     return NULL;
16869 }
16870 
16871 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16872 /*
16873  * Set v:cmdarg.
16874  * If "eap" != NULL, use "eap" to generate the value and return the old value.
16875  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
16876  * Must always be called in pairs!
16877  */
16878     char_u *
16879 set_cmdarg(eap, oldarg)
16880     exarg_T	*eap;
16881     char_u	*oldarg;
16882 {
16883     char_u	*oldval;
16884     char_u	*newval;
16885     unsigned	len;
16886 
16887     oldval = vimvars[VV_CMDARG].vv_str;
16888     if (eap == NULL)
16889     {
16890 	vim_free(oldval);
16891 	vimvars[VV_CMDARG].vv_str = oldarg;
16892 	return NULL;
16893     }
16894 
16895     if (eap->force_bin == FORCE_BIN)
16896 	len = 6;
16897     else if (eap->force_bin == FORCE_NOBIN)
16898 	len = 8;
16899     else
16900 	len = 0;
16901 
16902     if (eap->read_edit)
16903 	len += 7;
16904 
16905     if (eap->force_ff != 0)
16906 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
16907 # ifdef FEAT_MBYTE
16908     if (eap->force_enc != 0)
16909 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
16910     if (eap->bad_char != 0)
16911 	len += (unsigned)STRLEN(eap->cmd + eap->bad_char) + 7;
16912 # endif
16913 
16914     newval = alloc(len + 1);
16915     if (newval == NULL)
16916 	return NULL;
16917 
16918     if (eap->force_bin == FORCE_BIN)
16919 	sprintf((char *)newval, " ++bin");
16920     else if (eap->force_bin == FORCE_NOBIN)
16921 	sprintf((char *)newval, " ++nobin");
16922     else
16923 	*newval = NUL;
16924 
16925     if (eap->read_edit)
16926 	STRCAT(newval, " ++edit");
16927 
16928     if (eap->force_ff != 0)
16929 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
16930 						eap->cmd + eap->force_ff);
16931 # ifdef FEAT_MBYTE
16932     if (eap->force_enc != 0)
16933 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
16934 					       eap->cmd + eap->force_enc);
16935     if (eap->bad_char != 0)
16936 	sprintf((char *)newval + STRLEN(newval), " ++bad=%s",
16937 					       eap->cmd + eap->bad_char);
16938 # endif
16939     vimvars[VV_CMDARG].vv_str = newval;
16940     return oldval;
16941 }
16942 #endif
16943 
16944 /*
16945  * Get the value of internal variable "name".
16946  * Return OK or FAIL.
16947  */
16948     static int
16949 get_var_tv(name, len, rettv, verbose)
16950     char_u	*name;
16951     int		len;		/* length of "name" */
16952     typval_T	*rettv;		/* NULL when only checking existence */
16953     int		verbose;	/* may give error message */
16954 {
16955     int		ret = OK;
16956     typval_T	*tv = NULL;
16957     typval_T	atv;
16958     dictitem_T	*v;
16959     int		cc;
16960 
16961     /* truncate the name, so that we can use strcmp() */
16962     cc = name[len];
16963     name[len] = NUL;
16964 
16965     /*
16966      * Check for "b:changedtick".
16967      */
16968     if (STRCMP(name, "b:changedtick") == 0)
16969     {
16970 	atv.v_type = VAR_NUMBER;
16971 	atv.vval.v_number = curbuf->b_changedtick;
16972 	tv = &atv;
16973     }
16974 
16975     /*
16976      * Check for user-defined variables.
16977      */
16978     else
16979     {
16980 	v = find_var(name, NULL);
16981 	if (v != NULL)
16982 	    tv = &v->di_tv;
16983     }
16984 
16985     if (tv == NULL)
16986     {
16987 	if (rettv != NULL && verbose)
16988 	    EMSG2(_(e_undefvar), name);
16989 	ret = FAIL;
16990     }
16991     else if (rettv != NULL)
16992 	copy_tv(tv, rettv);
16993 
16994     name[len] = cc;
16995 
16996     return ret;
16997 }
16998 
16999 /*
17000  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
17001  * Also handle function call with Funcref variable: func(expr)
17002  * Can all be combined: dict.func(expr)[idx]['func'](expr)
17003  */
17004     static int
17005 handle_subscript(arg, rettv, evaluate, verbose)
17006     char_u	**arg;
17007     typval_T	*rettv;
17008     int		evaluate;	/* do more than finding the end */
17009     int		verbose;	/* give error messages */
17010 {
17011     int		ret = OK;
17012     dict_T	*selfdict = NULL;
17013     char_u	*s;
17014     int		len;
17015     typval_T	functv;
17016 
17017     while (ret == OK
17018 	    && (**arg == '['
17019 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
17020 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
17021 	    && !vim_iswhite(*(*arg - 1)))
17022     {
17023 	if (**arg == '(')
17024 	{
17025 	    /* need to copy the funcref so that we can clear rettv */
17026 	    functv = *rettv;
17027 	    rettv->v_type = VAR_UNKNOWN;
17028 
17029 	    /* Invoke the function.  Recursive! */
17030 	    s = functv.vval.v_string;
17031 	    ret = get_func_tv(s, (int)STRLEN(s), rettv, arg,
17032 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
17033 			&len, evaluate, selfdict);
17034 
17035 	    /* Clear the funcref afterwards, so that deleting it while
17036 	     * evaluating the arguments is possible (see test55). */
17037 	    clear_tv(&functv);
17038 
17039 	    /* Stop the expression evaluation when immediately aborting on
17040 	     * error, or when an interrupt occurred or an exception was thrown
17041 	     * but not caught. */
17042 	    if (aborting())
17043 	    {
17044 		if (ret == OK)
17045 		    clear_tv(rettv);
17046 		ret = FAIL;
17047 	    }
17048 	    dict_unref(selfdict);
17049 	    selfdict = NULL;
17050 	}
17051 	else /* **arg == '[' || **arg == '.' */
17052 	{
17053 	    dict_unref(selfdict);
17054 	    if (rettv->v_type == VAR_DICT)
17055 	    {
17056 		selfdict = rettv->vval.v_dict;
17057 		if (selfdict != NULL)
17058 		    ++selfdict->dv_refcount;
17059 	    }
17060 	    else
17061 		selfdict = NULL;
17062 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
17063 	    {
17064 		clear_tv(rettv);
17065 		ret = FAIL;
17066 	    }
17067 	}
17068     }
17069     dict_unref(selfdict);
17070     return ret;
17071 }
17072 
17073 /*
17074  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
17075  * value).
17076  */
17077     static typval_T *
17078 alloc_tv()
17079 {
17080     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
17081 }
17082 
17083 /*
17084  * Allocate memory for a variable type-value, and assign a string to it.
17085  * The string "s" must have been allocated, it is consumed.
17086  * Return NULL for out of memory, the variable otherwise.
17087  */
17088     static typval_T *
17089 alloc_string_tv(s)
17090     char_u	*s;
17091 {
17092     typval_T	*rettv;
17093 
17094     rettv = alloc_tv();
17095     if (rettv != NULL)
17096     {
17097 	rettv->v_type = VAR_STRING;
17098 	rettv->vval.v_string = s;
17099     }
17100     else
17101 	vim_free(s);
17102     return rettv;
17103 }
17104 
17105 /*
17106  * Free the memory for a variable type-value.
17107  */
17108     void
17109 free_tv(varp)
17110     typval_T *varp;
17111 {
17112     if (varp != NULL)
17113     {
17114 	switch (varp->v_type)
17115 	{
17116 	    case VAR_FUNC:
17117 		func_unref(varp->vval.v_string);
17118 		/*FALLTHROUGH*/
17119 	    case VAR_STRING:
17120 		vim_free(varp->vval.v_string);
17121 		break;
17122 	    case VAR_LIST:
17123 		list_unref(varp->vval.v_list);
17124 		break;
17125 	    case VAR_DICT:
17126 		dict_unref(varp->vval.v_dict);
17127 		break;
17128 	    case VAR_NUMBER:
17129 	    case VAR_UNKNOWN:
17130 		break;
17131 	    default:
17132 		EMSG2(_(e_intern2), "free_tv()");
17133 		break;
17134 	}
17135 	vim_free(varp);
17136     }
17137 }
17138 
17139 /*
17140  * Free the memory for a variable value and set the value to NULL or 0.
17141  */
17142     void
17143 clear_tv(varp)
17144     typval_T *varp;
17145 {
17146     if (varp != NULL)
17147     {
17148 	switch (varp->v_type)
17149 	{
17150 	    case VAR_FUNC:
17151 		func_unref(varp->vval.v_string);
17152 		/*FALLTHROUGH*/
17153 	    case VAR_STRING:
17154 		vim_free(varp->vval.v_string);
17155 		varp->vval.v_string = NULL;
17156 		break;
17157 	    case VAR_LIST:
17158 		list_unref(varp->vval.v_list);
17159 		varp->vval.v_list = NULL;
17160 		break;
17161 	    case VAR_DICT:
17162 		dict_unref(varp->vval.v_dict);
17163 		varp->vval.v_dict = NULL;
17164 		break;
17165 	    case VAR_NUMBER:
17166 		varp->vval.v_number = 0;
17167 		break;
17168 	    case VAR_UNKNOWN:
17169 		break;
17170 	    default:
17171 		EMSG2(_(e_intern2), "clear_tv()");
17172 	}
17173 	varp->v_lock = 0;
17174     }
17175 }
17176 
17177 /*
17178  * Set the value of a variable to NULL without freeing items.
17179  */
17180     static void
17181 init_tv(varp)
17182     typval_T *varp;
17183 {
17184     if (varp != NULL)
17185 	vim_memset(varp, 0, sizeof(typval_T));
17186 }
17187 
17188 /*
17189  * Get the number value of a variable.
17190  * If it is a String variable, uses vim_str2nr().
17191  * For incompatible types, return 0.
17192  * get_tv_number_chk() is similar to get_tv_number(), but informs the
17193  * caller of incompatible types: it sets *denote to TRUE if "denote"
17194  * is not NULL or returns -1 otherwise.
17195  */
17196     static long
17197 get_tv_number(varp)
17198     typval_T	*varp;
17199 {
17200     int		error = FALSE;
17201 
17202     return get_tv_number_chk(varp, &error);	/* return 0L on error */
17203 }
17204 
17205     long
17206 get_tv_number_chk(varp, denote)
17207     typval_T	*varp;
17208     int		*denote;
17209 {
17210     long	n = 0L;
17211 
17212     switch (varp->v_type)
17213     {
17214 	case VAR_NUMBER:
17215 	    return (long)(varp->vval.v_number);
17216 	case VAR_FUNC:
17217 	    EMSG(_("E703: Using a Funcref as a number"));
17218 	    break;
17219 	case VAR_STRING:
17220 	    if (varp->vval.v_string != NULL)
17221 		vim_str2nr(varp->vval.v_string, NULL, NULL,
17222 							TRUE, TRUE, &n, NULL);
17223 	    return n;
17224 	case VAR_LIST:
17225 	    EMSG(_("E745: Using a List as a number"));
17226 	    break;
17227 	case VAR_DICT:
17228 	    EMSG(_("E728: Using a Dictionary as a number"));
17229 	    break;
17230 	default:
17231 	    EMSG2(_(e_intern2), "get_tv_number()");
17232 	    break;
17233     }
17234     if (denote == NULL)		/* useful for values that must be unsigned */
17235 	n = -1;
17236     else
17237 	*denote = TRUE;
17238     return n;
17239 }
17240 
17241 /*
17242  * Get the lnum from the first argument.
17243  * Also accepts ".", "$", etc., but that only works for the current buffer.
17244  * Returns -1 on error.
17245  */
17246     static linenr_T
17247 get_tv_lnum(argvars)
17248     typval_T	*argvars;
17249 {
17250     typval_T	rettv;
17251     linenr_T	lnum;
17252 
17253     lnum = get_tv_number_chk(&argvars[0], NULL);
17254     if (lnum == 0)  /* no valid number, try using line() */
17255     {
17256 	rettv.v_type = VAR_NUMBER;
17257 	f_line(argvars, &rettv);
17258 	lnum = rettv.vval.v_number;
17259 	clear_tv(&rettv);
17260     }
17261     return lnum;
17262 }
17263 
17264 /*
17265  * Get the lnum from the first argument.
17266  * Also accepts "$", then "buf" is used.
17267  * Returns 0 on error.
17268  */
17269     static linenr_T
17270 get_tv_lnum_buf(argvars, buf)
17271     typval_T	*argvars;
17272     buf_T	*buf;
17273 {
17274     if (argvars[0].v_type == VAR_STRING
17275 	    && argvars[0].vval.v_string != NULL
17276 	    && argvars[0].vval.v_string[0] == '$'
17277 	    && buf != NULL)
17278 	return buf->b_ml.ml_line_count;
17279     return get_tv_number_chk(&argvars[0], NULL);
17280 }
17281 
17282 /*
17283  * Get the string value of a variable.
17284  * If it is a Number variable, the number is converted into a string.
17285  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
17286  * get_tv_string_buf() uses a given buffer.
17287  * If the String variable has never been set, return an empty string.
17288  * Never returns NULL;
17289  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
17290  * NULL on error.
17291  */
17292     static char_u *
17293 get_tv_string(varp)
17294     typval_T	*varp;
17295 {
17296     static char_u   mybuf[NUMBUFLEN];
17297 
17298     return get_tv_string_buf(varp, mybuf);
17299 }
17300 
17301     static char_u *
17302 get_tv_string_buf(varp, buf)
17303     typval_T	*varp;
17304     char_u	*buf;
17305 {
17306     char_u	*res =  get_tv_string_buf_chk(varp, buf);
17307 
17308     return res != NULL ? res : (char_u *)"";
17309 }
17310 
17311     char_u *
17312 get_tv_string_chk(varp)
17313     typval_T	*varp;
17314 {
17315     static char_u   mybuf[NUMBUFLEN];
17316 
17317     return get_tv_string_buf_chk(varp, mybuf);
17318 }
17319 
17320     static char_u *
17321 get_tv_string_buf_chk(varp, buf)
17322     typval_T	*varp;
17323     char_u	*buf;
17324 {
17325     switch (varp->v_type)
17326     {
17327 	case VAR_NUMBER:
17328 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
17329 	    return buf;
17330 	case VAR_FUNC:
17331 	    EMSG(_("E729: using Funcref as a String"));
17332 	    break;
17333 	case VAR_LIST:
17334 	    EMSG(_("E730: using List as a String"));
17335 	    break;
17336 	case VAR_DICT:
17337 	    EMSG(_("E731: using Dictionary as a String"));
17338 	    break;
17339 	case VAR_STRING:
17340 	    if (varp->vval.v_string != NULL)
17341 		return varp->vval.v_string;
17342 	    return (char_u *)"";
17343 	default:
17344 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
17345 	    break;
17346     }
17347     return NULL;
17348 }
17349 
17350 /*
17351  * Find variable "name" in the list of variables.
17352  * Return a pointer to it if found, NULL if not found.
17353  * Careful: "a:0" variables don't have a name.
17354  * When "htp" is not NULL we are writing to the variable, set "htp" to the
17355  * hashtab_T used.
17356  */
17357     static dictitem_T *
17358 find_var(name, htp)
17359     char_u	*name;
17360     hashtab_T	**htp;
17361 {
17362     char_u	*varname;
17363     hashtab_T	*ht;
17364 
17365     ht = find_var_ht(name, &varname);
17366     if (htp != NULL)
17367 	*htp = ht;
17368     if (ht == NULL)
17369 	return NULL;
17370     return find_var_in_ht(ht, varname, htp != NULL);
17371 }
17372 
17373 /*
17374  * Find variable "varname" in hashtab "ht".
17375  * Returns NULL if not found.
17376  */
17377     static dictitem_T *
17378 find_var_in_ht(ht, varname, writing)
17379     hashtab_T	*ht;
17380     char_u	*varname;
17381     int		writing;
17382 {
17383     hashitem_T	*hi;
17384 
17385     if (*varname == NUL)
17386     {
17387 	/* Must be something like "s:", otherwise "ht" would be NULL. */
17388 	switch (varname[-2])
17389 	{
17390 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
17391 	    case 'g': return &globvars_var;
17392 	    case 'v': return &vimvars_var;
17393 	    case 'b': return &curbuf->b_bufvar;
17394 	    case 'w': return &curwin->w_winvar;
17395 #ifdef FEAT_WINDOWS
17396 	    case 't': return &curtab->tp_winvar;
17397 #endif
17398 	    case 'l': return current_funccal == NULL
17399 					? NULL : &current_funccal->l_vars_var;
17400 	    case 'a': return current_funccal == NULL
17401 				       ? NULL : &current_funccal->l_avars_var;
17402 	}
17403 	return NULL;
17404     }
17405 
17406     hi = hash_find(ht, varname);
17407     if (HASHITEM_EMPTY(hi))
17408     {
17409 	/* For global variables we may try auto-loading the script.  If it
17410 	 * worked find the variable again.  Don't auto-load a script if it was
17411 	 * loaded already, otherwise it would be loaded every time when
17412 	 * checking if a function name is a Funcref variable. */
17413 	if (ht == &globvarht && !writing
17414 			    && script_autoload(varname, FALSE) && !aborting())
17415 	    hi = hash_find(ht, varname);
17416 	if (HASHITEM_EMPTY(hi))
17417 	    return NULL;
17418     }
17419     return HI2DI(hi);
17420 }
17421 
17422 /*
17423  * Find the hashtab used for a variable name.
17424  * Set "varname" to the start of name without ':'.
17425  */
17426     static hashtab_T *
17427 find_var_ht(name, varname)
17428     char_u  *name;
17429     char_u  **varname;
17430 {
17431     hashitem_T	*hi;
17432 
17433     if (name[1] != ':')
17434     {
17435 	/* The name must not start with a colon or #. */
17436 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
17437 	    return NULL;
17438 	*varname = name;
17439 
17440 	/* "version" is "v:version" in all scopes */
17441 	hi = hash_find(&compat_hashtab, name);
17442 	if (!HASHITEM_EMPTY(hi))
17443 	    return &compat_hashtab;
17444 
17445 	if (current_funccal == NULL)
17446 	    return &globvarht;			/* global variable */
17447 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
17448     }
17449     *varname = name + 2;
17450     if (*name == 'g')				/* global variable */
17451 	return &globvarht;
17452     /* There must be no ':' or '#' in the rest of the name, unless g: is used
17453      */
17454     if (vim_strchr(name + 2, ':') != NULL
17455 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
17456 	return NULL;
17457     if (*name == 'b')				/* buffer variable */
17458 	return &curbuf->b_vars.dv_hashtab;
17459     if (*name == 'w')				/* window variable */
17460 	return &curwin->w_vars.dv_hashtab;
17461 #ifdef FEAT_WINDOWS
17462     if (*name == 't')				/* tab page variable */
17463 	return &curtab->tp_vars.dv_hashtab;
17464 #endif
17465     if (*name == 'v')				/* v: variable */
17466 	return &vimvarht;
17467     if (*name == 'a' && current_funccal != NULL) /* function argument */
17468 	return &current_funccal->l_avars.dv_hashtab;
17469     if (*name == 'l' && current_funccal != NULL) /* local function variable */
17470 	return &current_funccal->l_vars.dv_hashtab;
17471     if (*name == 's'				/* script variable */
17472 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
17473 	return &SCRIPT_VARS(current_SID);
17474     return NULL;
17475 }
17476 
17477 /*
17478  * Get the string value of a (global/local) variable.
17479  * Returns NULL when it doesn't exist.
17480  */
17481     char_u *
17482 get_var_value(name)
17483     char_u	*name;
17484 {
17485     dictitem_T	*v;
17486 
17487     v = find_var(name, NULL);
17488     if (v == NULL)
17489 	return NULL;
17490     return get_tv_string(&v->di_tv);
17491 }
17492 
17493 /*
17494  * Allocate a new hashtab for a sourced script.  It will be used while
17495  * sourcing this script and when executing functions defined in the script.
17496  */
17497     void
17498 new_script_vars(id)
17499     scid_T id;
17500 {
17501     int		i;
17502     hashtab_T	*ht;
17503     scriptvar_T *sv;
17504 
17505     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
17506     {
17507 	/* Re-allocating ga_data means that an ht_array pointing to
17508 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
17509 	 * at its init value.  Also reset "v_dict", it's always the same. */
17510 	for (i = 1; i <= ga_scripts.ga_len; ++i)
17511 	{
17512 	    ht = &SCRIPT_VARS(i);
17513 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
17514 		ht->ht_array = ht->ht_smallarray;
17515 	    sv = &SCRIPT_SV(i);
17516 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
17517 	}
17518 
17519 	while (ga_scripts.ga_len < id)
17520 	{
17521 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
17522 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
17523 	    ++ga_scripts.ga_len;
17524 	}
17525     }
17526 }
17527 
17528 /*
17529  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
17530  * point to it.
17531  */
17532     void
17533 init_var_dict(dict, dict_var)
17534     dict_T	*dict;
17535     dictitem_T	*dict_var;
17536 {
17537     hash_init(&dict->dv_hashtab);
17538     dict->dv_refcount = 99999;
17539     dict_var->di_tv.vval.v_dict = dict;
17540     dict_var->di_tv.v_type = VAR_DICT;
17541     dict_var->di_tv.v_lock = VAR_FIXED;
17542     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
17543     dict_var->di_key[0] = NUL;
17544 }
17545 
17546 /*
17547  * Clean up a list of internal variables.
17548  * Frees all allocated variables and the value they contain.
17549  * Clears hashtab "ht", does not free it.
17550  */
17551     void
17552 vars_clear(ht)
17553     hashtab_T *ht;
17554 {
17555     vars_clear_ext(ht, TRUE);
17556 }
17557 
17558 /*
17559  * Like vars_clear(), but only free the value if "free_val" is TRUE.
17560  */
17561     static void
17562 vars_clear_ext(ht, free_val)
17563     hashtab_T	*ht;
17564     int		free_val;
17565 {
17566     int		todo;
17567     hashitem_T	*hi;
17568     dictitem_T	*v;
17569 
17570     hash_lock(ht);
17571     todo = (int)ht->ht_used;
17572     for (hi = ht->ht_array; todo > 0; ++hi)
17573     {
17574 	if (!HASHITEM_EMPTY(hi))
17575 	{
17576 	    --todo;
17577 
17578 	    /* Free the variable.  Don't remove it from the hashtab,
17579 	     * ht_array might change then.  hash_clear() takes care of it
17580 	     * later. */
17581 	    v = HI2DI(hi);
17582 	    if (free_val)
17583 		clear_tv(&v->di_tv);
17584 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
17585 		vim_free(v);
17586 	}
17587     }
17588     hash_clear(ht);
17589     ht->ht_used = 0;
17590 }
17591 
17592 /*
17593  * Delete a variable from hashtab "ht" at item "hi".
17594  * Clear the variable value and free the dictitem.
17595  */
17596     static void
17597 delete_var(ht, hi)
17598     hashtab_T	*ht;
17599     hashitem_T	*hi;
17600 {
17601     dictitem_T	*di = HI2DI(hi);
17602 
17603     hash_remove(ht, hi);
17604     clear_tv(&di->di_tv);
17605     vim_free(di);
17606 }
17607 
17608 /*
17609  * List the value of one internal variable.
17610  */
17611     static void
17612 list_one_var(v, prefix)
17613     dictitem_T	*v;
17614     char_u	*prefix;
17615 {
17616     char_u	*tofree;
17617     char_u	*s;
17618     char_u	numbuf[NUMBUFLEN];
17619 
17620     s = echo_string(&v->di_tv, &tofree, numbuf, ++current_copyID);
17621     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
17622 						s == NULL ? (char_u *)"" : s);
17623     vim_free(tofree);
17624 }
17625 
17626     static void
17627 list_one_var_a(prefix, name, type, string)
17628     char_u	*prefix;
17629     char_u	*name;
17630     int		type;
17631     char_u	*string;
17632 {
17633     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
17634     if (name != NULL)	/* "a:" vars don't have a name stored */
17635 	msg_puts(name);
17636     msg_putchar(' ');
17637     msg_advance(22);
17638     if (type == VAR_NUMBER)
17639 	msg_putchar('#');
17640     else if (type == VAR_FUNC)
17641 	msg_putchar('*');
17642     else if (type == VAR_LIST)
17643     {
17644 	msg_putchar('[');
17645 	if (*string == '[')
17646 	    ++string;
17647     }
17648     else if (type == VAR_DICT)
17649     {
17650 	msg_putchar('{');
17651 	if (*string == '{')
17652 	    ++string;
17653     }
17654     else
17655 	msg_putchar(' ');
17656 
17657     msg_outtrans(string);
17658 
17659     if (type == VAR_FUNC)
17660 	msg_puts((char_u *)"()");
17661 }
17662 
17663 /*
17664  * Set variable "name" to value in "tv".
17665  * If the variable already exists, the value is updated.
17666  * Otherwise the variable is created.
17667  */
17668     static void
17669 set_var(name, tv, copy)
17670     char_u	*name;
17671     typval_T	*tv;
17672     int		copy;	    /* make copy of value in "tv" */
17673 {
17674     dictitem_T	*v;
17675     char_u	*varname;
17676     hashtab_T	*ht;
17677     char_u	*p;
17678 
17679     if (tv->v_type == VAR_FUNC)
17680     {
17681 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
17682 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
17683 							 ? name[2] : name[0]))
17684 	{
17685 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
17686 	    return;
17687 	}
17688 	if (function_exists(name))
17689 	{
17690 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
17691 									name);
17692 	    return;
17693 	}
17694     }
17695 
17696     ht = find_var_ht(name, &varname);
17697     if (ht == NULL || *varname == NUL)
17698     {
17699 	EMSG2(_(e_illvar), name);
17700 	return;
17701     }
17702 
17703     v = find_var_in_ht(ht, varname, TRUE);
17704     if (v != NULL)
17705     {
17706 	/* existing variable, need to clear the value */
17707 	if (var_check_ro(v->di_flags, name)
17708 				      || tv_check_lock(v->di_tv.v_lock, name))
17709 	    return;
17710 	if (v->di_tv.v_type != tv->v_type
17711 		&& !((v->di_tv.v_type == VAR_STRING
17712 			|| v->di_tv.v_type == VAR_NUMBER)
17713 		    && (tv->v_type == VAR_STRING
17714 			|| tv->v_type == VAR_NUMBER)))
17715 	{
17716 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
17717 	    return;
17718 	}
17719 
17720 	/*
17721 	 * Handle setting internal v: variables separately: we don't change
17722 	 * the type.
17723 	 */
17724 	if (ht == &vimvarht)
17725 	{
17726 	    if (v->di_tv.v_type == VAR_STRING)
17727 	    {
17728 		vim_free(v->di_tv.vval.v_string);
17729 		if (copy || tv->v_type != VAR_STRING)
17730 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
17731 		else
17732 		{
17733 		    /* Take over the string to avoid an extra alloc/free. */
17734 		    v->di_tv.vval.v_string = tv->vval.v_string;
17735 		    tv->vval.v_string = NULL;
17736 		}
17737 	    }
17738 	    else if (v->di_tv.v_type != VAR_NUMBER)
17739 		EMSG2(_(e_intern2), "set_var()");
17740 	    else
17741 		v->di_tv.vval.v_number = get_tv_number(tv);
17742 	    return;
17743 	}
17744 
17745 	clear_tv(&v->di_tv);
17746     }
17747     else		    /* add a new variable */
17748     {
17749 	/* Make sure the variable name is valid. */
17750 	for (p = varname; *p != NUL; ++p)
17751 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
17752 						       && *p != AUTOLOAD_CHAR)
17753 	    {
17754 		EMSG2(_(e_illvar), varname);
17755 		return;
17756 	    }
17757 
17758 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
17759 							  + STRLEN(varname)));
17760 	if (v == NULL)
17761 	    return;
17762 	STRCPY(v->di_key, varname);
17763 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
17764 	{
17765 	    vim_free(v);
17766 	    return;
17767 	}
17768 	v->di_flags = 0;
17769     }
17770 
17771     if (copy || tv->v_type == VAR_NUMBER)
17772 	copy_tv(tv, &v->di_tv);
17773     else
17774     {
17775 	v->di_tv = *tv;
17776 	v->di_tv.v_lock = 0;
17777 	init_tv(tv);
17778     }
17779 }
17780 
17781 /*
17782  * Return TRUE if di_flags "flags" indicate read-only variable "name".
17783  * Also give an error message.
17784  */
17785     static int
17786 var_check_ro(flags, name)
17787     int		flags;
17788     char_u	*name;
17789 {
17790     if (flags & DI_FLAGS_RO)
17791     {
17792 	EMSG2(_(e_readonlyvar), name);
17793 	return TRUE;
17794     }
17795     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
17796     {
17797 	EMSG2(_(e_readonlysbx), name);
17798 	return TRUE;
17799     }
17800     return FALSE;
17801 }
17802 
17803 /*
17804  * Return TRUE if typeval "tv" is set to be locked (immutable).
17805  * Also give an error message, using "name".
17806  */
17807     static int
17808 tv_check_lock(lock, name)
17809     int		lock;
17810     char_u	*name;
17811 {
17812     if (lock & VAR_LOCKED)
17813     {
17814 	EMSG2(_("E741: Value is locked: %s"),
17815 				name == NULL ? (char_u *)_("Unknown") : name);
17816 	return TRUE;
17817     }
17818     if (lock & VAR_FIXED)
17819     {
17820 	EMSG2(_("E742: Cannot change value of %s"),
17821 				name == NULL ? (char_u *)_("Unknown") : name);
17822 	return TRUE;
17823     }
17824     return FALSE;
17825 }
17826 
17827 /*
17828  * Copy the values from typval_T "from" to typval_T "to".
17829  * When needed allocates string or increases reference count.
17830  * Does not make a copy of a list or dict but copies the reference!
17831  */
17832     static void
17833 copy_tv(from, to)
17834     typval_T *from;
17835     typval_T *to;
17836 {
17837     to->v_type = from->v_type;
17838     to->v_lock = 0;
17839     switch (from->v_type)
17840     {
17841 	case VAR_NUMBER:
17842 	    to->vval.v_number = from->vval.v_number;
17843 	    break;
17844 	case VAR_STRING:
17845 	case VAR_FUNC:
17846 	    if (from->vval.v_string == NULL)
17847 		to->vval.v_string = NULL;
17848 	    else
17849 	    {
17850 		to->vval.v_string = vim_strsave(from->vval.v_string);
17851 		if (from->v_type == VAR_FUNC)
17852 		    func_ref(to->vval.v_string);
17853 	    }
17854 	    break;
17855 	case VAR_LIST:
17856 	    if (from->vval.v_list == NULL)
17857 		to->vval.v_list = NULL;
17858 	    else
17859 	    {
17860 		to->vval.v_list = from->vval.v_list;
17861 		++to->vval.v_list->lv_refcount;
17862 	    }
17863 	    break;
17864 	case VAR_DICT:
17865 	    if (from->vval.v_dict == NULL)
17866 		to->vval.v_dict = NULL;
17867 	    else
17868 	    {
17869 		to->vval.v_dict = from->vval.v_dict;
17870 		++to->vval.v_dict->dv_refcount;
17871 	    }
17872 	    break;
17873 	default:
17874 	    EMSG2(_(e_intern2), "copy_tv()");
17875 	    break;
17876     }
17877 }
17878 
17879 /*
17880  * Make a copy of an item.
17881  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
17882  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
17883  * reference to an already copied list/dict can be used.
17884  * Returns FAIL or OK.
17885  */
17886     static int
17887 item_copy(from, to, deep, copyID)
17888     typval_T	*from;
17889     typval_T	*to;
17890     int		deep;
17891     int		copyID;
17892 {
17893     static int	recurse = 0;
17894     int		ret = OK;
17895 
17896     if (recurse >= DICT_MAXNEST)
17897     {
17898 	EMSG(_("E698: variable nested too deep for making a copy"));
17899 	return FAIL;
17900     }
17901     ++recurse;
17902 
17903     switch (from->v_type)
17904     {
17905 	case VAR_NUMBER:
17906 	case VAR_STRING:
17907 	case VAR_FUNC:
17908 	    copy_tv(from, to);
17909 	    break;
17910 	case VAR_LIST:
17911 	    to->v_type = VAR_LIST;
17912 	    to->v_lock = 0;
17913 	    if (from->vval.v_list == NULL)
17914 		to->vval.v_list = NULL;
17915 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
17916 	    {
17917 		/* use the copy made earlier */
17918 		to->vval.v_list = from->vval.v_list->lv_copylist;
17919 		++to->vval.v_list->lv_refcount;
17920 	    }
17921 	    else
17922 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
17923 	    if (to->vval.v_list == NULL)
17924 		ret = FAIL;
17925 	    break;
17926 	case VAR_DICT:
17927 	    to->v_type = VAR_DICT;
17928 	    to->v_lock = 0;
17929 	    if (from->vval.v_dict == NULL)
17930 		to->vval.v_dict = NULL;
17931 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
17932 	    {
17933 		/* use the copy made earlier */
17934 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
17935 		++to->vval.v_dict->dv_refcount;
17936 	    }
17937 	    else
17938 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
17939 	    if (to->vval.v_dict == NULL)
17940 		ret = FAIL;
17941 	    break;
17942 	default:
17943 	    EMSG2(_(e_intern2), "item_copy()");
17944 	    ret = FAIL;
17945     }
17946     --recurse;
17947     return ret;
17948 }
17949 
17950 /*
17951  * ":echo expr1 ..."	print each argument separated with a space, add a
17952  *			newline at the end.
17953  * ":echon expr1 ..."	print each argument plain.
17954  */
17955     void
17956 ex_echo(eap)
17957     exarg_T	*eap;
17958 {
17959     char_u	*arg = eap->arg;
17960     typval_T	rettv;
17961     char_u	*tofree;
17962     char_u	*p;
17963     int		needclr = TRUE;
17964     int		atstart = TRUE;
17965     char_u	numbuf[NUMBUFLEN];
17966 
17967     if (eap->skip)
17968 	++emsg_skip;
17969     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
17970     {
17971 	p = arg;
17972 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
17973 	{
17974 	    /*
17975 	     * Report the invalid expression unless the expression evaluation
17976 	     * has been cancelled due to an aborting error, an interrupt, or an
17977 	     * exception.
17978 	     */
17979 	    if (!aborting())
17980 		EMSG2(_(e_invexpr2), p);
17981 	    break;
17982 	}
17983 	if (!eap->skip)
17984 	{
17985 	    if (atstart)
17986 	    {
17987 		atstart = FALSE;
17988 		/* Call msg_start() after eval1(), evaluating the expression
17989 		 * may cause a message to appear. */
17990 		if (eap->cmdidx == CMD_echo)
17991 		    msg_start();
17992 	    }
17993 	    else if (eap->cmdidx == CMD_echo)
17994 		msg_puts_attr((char_u *)" ", echo_attr);
17995 	    p = echo_string(&rettv, &tofree, numbuf, ++current_copyID);
17996 	    if (p != NULL)
17997 		for ( ; *p != NUL && !got_int; ++p)
17998 		{
17999 		    if (*p == '\n' || *p == '\r' || *p == TAB)
18000 		    {
18001 			if (*p != TAB && needclr)
18002 			{
18003 			    /* remove any text still there from the command */
18004 			    msg_clr_eos();
18005 			    needclr = FALSE;
18006 			}
18007 			msg_putchar_attr(*p, echo_attr);
18008 		    }
18009 		    else
18010 		    {
18011 #ifdef FEAT_MBYTE
18012 			if (has_mbyte)
18013 			{
18014 			    int i = (*mb_ptr2len)(p);
18015 
18016 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
18017 			    p += i - 1;
18018 			}
18019 			else
18020 #endif
18021 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
18022 		    }
18023 		}
18024 	    vim_free(tofree);
18025 	}
18026 	clear_tv(&rettv);
18027 	arg = skipwhite(arg);
18028     }
18029     eap->nextcmd = check_nextcmd(arg);
18030 
18031     if (eap->skip)
18032 	--emsg_skip;
18033     else
18034     {
18035 	/* remove text that may still be there from the command */
18036 	if (needclr)
18037 	    msg_clr_eos();
18038 	if (eap->cmdidx == CMD_echo)
18039 	    msg_end();
18040     }
18041 }
18042 
18043 /*
18044  * ":echohl {name}".
18045  */
18046     void
18047 ex_echohl(eap)
18048     exarg_T	*eap;
18049 {
18050     int		id;
18051 
18052     id = syn_name2id(eap->arg);
18053     if (id == 0)
18054 	echo_attr = 0;
18055     else
18056 	echo_attr = syn_id2attr(id);
18057 }
18058 
18059 /*
18060  * ":execute expr1 ..."	execute the result of an expression.
18061  * ":echomsg expr1 ..."	Print a message
18062  * ":echoerr expr1 ..."	Print an error
18063  * Each gets spaces around each argument and a newline at the end for
18064  * echo commands
18065  */
18066     void
18067 ex_execute(eap)
18068     exarg_T	*eap;
18069 {
18070     char_u	*arg = eap->arg;
18071     typval_T	rettv;
18072     int		ret = OK;
18073     char_u	*p;
18074     garray_T	ga;
18075     int		len;
18076     int		save_did_emsg;
18077 
18078     ga_init2(&ga, 1, 80);
18079 
18080     if (eap->skip)
18081 	++emsg_skip;
18082     while (*arg != NUL && *arg != '|' && *arg != '\n')
18083     {
18084 	p = arg;
18085 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
18086 	{
18087 	    /*
18088 	     * Report the invalid expression unless the expression evaluation
18089 	     * has been cancelled due to an aborting error, an interrupt, or an
18090 	     * exception.
18091 	     */
18092 	    if (!aborting())
18093 		EMSG2(_(e_invexpr2), p);
18094 	    ret = FAIL;
18095 	    break;
18096 	}
18097 
18098 	if (!eap->skip)
18099 	{
18100 	    p = get_tv_string(&rettv);
18101 	    len = (int)STRLEN(p);
18102 	    if (ga_grow(&ga, len + 2) == FAIL)
18103 	    {
18104 		clear_tv(&rettv);
18105 		ret = FAIL;
18106 		break;
18107 	    }
18108 	    if (ga.ga_len)
18109 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
18110 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
18111 	    ga.ga_len += len;
18112 	}
18113 
18114 	clear_tv(&rettv);
18115 	arg = skipwhite(arg);
18116     }
18117 
18118     if (ret != FAIL && ga.ga_data != NULL)
18119     {
18120 	if (eap->cmdidx == CMD_echomsg)
18121 	{
18122 	    MSG_ATTR(ga.ga_data, echo_attr);
18123 	    out_flush();
18124 	}
18125 	else if (eap->cmdidx == CMD_echoerr)
18126 	{
18127 	    /* We don't want to abort following commands, restore did_emsg. */
18128 	    save_did_emsg = did_emsg;
18129 	    EMSG((char_u *)ga.ga_data);
18130 	    if (!force_abort)
18131 		did_emsg = save_did_emsg;
18132 	}
18133 	else if (eap->cmdidx == CMD_execute)
18134 	    do_cmdline((char_u *)ga.ga_data,
18135 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
18136     }
18137 
18138     ga_clear(&ga);
18139 
18140     if (eap->skip)
18141 	--emsg_skip;
18142 
18143     eap->nextcmd = check_nextcmd(arg);
18144 }
18145 
18146 /*
18147  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
18148  * "arg" points to the "&" or '+' when called, to "option" when returning.
18149  * Returns NULL when no option name found.  Otherwise pointer to the char
18150  * after the option name.
18151  */
18152     static char_u *
18153 find_option_end(arg, opt_flags)
18154     char_u	**arg;
18155     int		*opt_flags;
18156 {
18157     char_u	*p = *arg;
18158 
18159     ++p;
18160     if (*p == 'g' && p[1] == ':')
18161     {
18162 	*opt_flags = OPT_GLOBAL;
18163 	p += 2;
18164     }
18165     else if (*p == 'l' && p[1] == ':')
18166     {
18167 	*opt_flags = OPT_LOCAL;
18168 	p += 2;
18169     }
18170     else
18171 	*opt_flags = 0;
18172 
18173     if (!ASCII_ISALPHA(*p))
18174 	return NULL;
18175     *arg = p;
18176 
18177     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
18178 	p += 4;	    /* termcap option */
18179     else
18180 	while (ASCII_ISALPHA(*p))
18181 	    ++p;
18182     return p;
18183 }
18184 
18185 /*
18186  * ":function"
18187  */
18188     void
18189 ex_function(eap)
18190     exarg_T	*eap;
18191 {
18192     char_u	*theline;
18193     int		j;
18194     int		c;
18195     int		saved_did_emsg;
18196     char_u	*name = NULL;
18197     char_u	*p;
18198     char_u	*arg;
18199     char_u	*line_arg = NULL;
18200     garray_T	newargs;
18201     garray_T	newlines;
18202     int		varargs = FALSE;
18203     int		mustend = FALSE;
18204     int		flags = 0;
18205     ufunc_T	*fp;
18206     int		indent;
18207     int		nesting;
18208     char_u	*skip_until = NULL;
18209     dictitem_T	*v;
18210     funcdict_T	fudi;
18211     static int	func_nr = 0;	    /* number for nameless function */
18212     int		paren;
18213     hashtab_T	*ht;
18214     int		todo;
18215     hashitem_T	*hi;
18216     int		sourcing_lnum_off;
18217 
18218     /*
18219      * ":function" without argument: list functions.
18220      */
18221     if (ends_excmd(*eap->arg))
18222     {
18223 	if (!eap->skip)
18224 	{
18225 	    todo = (int)func_hashtab.ht_used;
18226 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
18227 	    {
18228 		if (!HASHITEM_EMPTY(hi))
18229 		{
18230 		    --todo;
18231 		    fp = HI2UF(hi);
18232 		    if (!isdigit(*fp->uf_name))
18233 			list_func_head(fp, FALSE);
18234 		}
18235 	    }
18236 	}
18237 	eap->nextcmd = check_nextcmd(eap->arg);
18238 	return;
18239     }
18240 
18241     /*
18242      * ":function /pat": list functions matching pattern.
18243      */
18244     if (*eap->arg == '/')
18245     {
18246 	p = skip_regexp(eap->arg + 1, '/', TRUE, NULL);
18247 	if (!eap->skip)
18248 	{
18249 	    regmatch_T	regmatch;
18250 
18251 	    c = *p;
18252 	    *p = NUL;
18253 	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
18254 	    *p = c;
18255 	    if (regmatch.regprog != NULL)
18256 	    {
18257 		regmatch.rm_ic = p_ic;
18258 
18259 		todo = (int)func_hashtab.ht_used;
18260 		for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
18261 		{
18262 		    if (!HASHITEM_EMPTY(hi))
18263 		    {
18264 			--todo;
18265 			fp = HI2UF(hi);
18266 			if (!isdigit(*fp->uf_name)
18267 				    && vim_regexec(&regmatch, fp->uf_name, 0))
18268 			    list_func_head(fp, FALSE);
18269 		    }
18270 		}
18271 	    }
18272 	}
18273 	if (*p == '/')
18274 	    ++p;
18275 	eap->nextcmd = check_nextcmd(p);
18276 	return;
18277     }
18278 
18279     /*
18280      * Get the function name.  There are these situations:
18281      * func	    normal function name
18282      *		    "name" == func, "fudi.fd_dict" == NULL
18283      * dict.func    new dictionary entry
18284      *		    "name" == NULL, "fudi.fd_dict" set,
18285      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
18286      * dict.func    existing dict entry with a Funcref
18287      *		    "name" == func, "fudi.fd_dict" set,
18288      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
18289      * dict.func    existing dict entry that's not a Funcref
18290      *		    "name" == NULL, "fudi.fd_dict" set,
18291      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
18292      */
18293     p = eap->arg;
18294     name = trans_function_name(&p, eap->skip, 0, &fudi);
18295     paren = (vim_strchr(p, '(') != NULL);
18296     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
18297     {
18298 	/*
18299 	 * Return on an invalid expression in braces, unless the expression
18300 	 * evaluation has been cancelled due to an aborting error, an
18301 	 * interrupt, or an exception.
18302 	 */
18303 	if (!aborting())
18304 	{
18305 	    if (!eap->skip && fudi.fd_newkey != NULL)
18306 		EMSG2(_(e_dictkey), fudi.fd_newkey);
18307 	    vim_free(fudi.fd_newkey);
18308 	    return;
18309 	}
18310 	else
18311 	    eap->skip = TRUE;
18312     }
18313 
18314     /* An error in a function call during evaluation of an expression in magic
18315      * braces should not cause the function not to be defined. */
18316     saved_did_emsg = did_emsg;
18317     did_emsg = FALSE;
18318 
18319     /*
18320      * ":function func" with only function name: list function.
18321      */
18322     if (!paren)
18323     {
18324 	if (!ends_excmd(*skipwhite(p)))
18325 	{
18326 	    EMSG(_(e_trailing));
18327 	    goto ret_free;
18328 	}
18329 	eap->nextcmd = check_nextcmd(p);
18330 	if (eap->nextcmd != NULL)
18331 	    *p = NUL;
18332 	if (!eap->skip && !got_int)
18333 	{
18334 	    fp = find_func(name);
18335 	    if (fp != NULL)
18336 	    {
18337 		list_func_head(fp, TRUE);
18338 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
18339 		{
18340 		    if (FUNCLINE(fp, j) == NULL)
18341 			continue;
18342 		    msg_putchar('\n');
18343 		    msg_outnum((long)(j + 1));
18344 		    if (j < 9)
18345 			msg_putchar(' ');
18346 		    if (j < 99)
18347 			msg_putchar(' ');
18348 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
18349 		    out_flush();	/* show a line at a time */
18350 		    ui_breakcheck();
18351 		}
18352 		if (!got_int)
18353 		{
18354 		    msg_putchar('\n');
18355 		    msg_puts((char_u *)"   endfunction");
18356 		}
18357 	    }
18358 	    else
18359 		emsg_funcname("E123: Undefined function: %s", name);
18360 	}
18361 	goto ret_free;
18362     }
18363 
18364     /*
18365      * ":function name(arg1, arg2)" Define function.
18366      */
18367     p = skipwhite(p);
18368     if (*p != '(')
18369     {
18370 	if (!eap->skip)
18371 	{
18372 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
18373 	    goto ret_free;
18374 	}
18375 	/* attempt to continue by skipping some text */
18376 	if (vim_strchr(p, '(') != NULL)
18377 	    p = vim_strchr(p, '(');
18378     }
18379     p = skipwhite(p + 1);
18380 
18381     ga_init2(&newargs, (int)sizeof(char_u *), 3);
18382     ga_init2(&newlines, (int)sizeof(char_u *), 3);
18383 
18384     if (!eap->skip)
18385     {
18386 	/* Check the name of the function. */
18387 	if (name != NULL)
18388 	    arg = name;
18389 	else
18390 	    arg = fudi.fd_newkey;
18391 	if (arg != NULL)
18392 	{
18393 	    if (*arg == K_SPECIAL)
18394 		j = 3;
18395 	    else
18396 		j = 0;
18397 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
18398 						      : eval_isnamec(arg[j])))
18399 		++j;
18400 	    if (arg[j] != NUL)
18401 		emsg_funcname(_(e_invarg2), arg);
18402 	}
18403     }
18404 
18405     /*
18406      * Isolate the arguments: "arg1, arg2, ...)"
18407      */
18408     while (*p != ')')
18409     {
18410 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
18411 	{
18412 	    varargs = TRUE;
18413 	    p += 3;
18414 	    mustend = TRUE;
18415 	}
18416 	else
18417 	{
18418 	    arg = p;
18419 	    while (ASCII_ISALNUM(*p) || *p == '_')
18420 		++p;
18421 	    if (arg == p || isdigit(*arg)
18422 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
18423 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
18424 	    {
18425 		if (!eap->skip)
18426 		    EMSG2(_("E125: Illegal argument: %s"), arg);
18427 		break;
18428 	    }
18429 	    if (ga_grow(&newargs, 1) == FAIL)
18430 		goto erret;
18431 	    c = *p;
18432 	    *p = NUL;
18433 	    arg = vim_strsave(arg);
18434 	    if (arg == NULL)
18435 		goto erret;
18436 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
18437 	    *p = c;
18438 	    newargs.ga_len++;
18439 	    if (*p == ',')
18440 		++p;
18441 	    else
18442 		mustend = TRUE;
18443 	}
18444 	p = skipwhite(p);
18445 	if (mustend && *p != ')')
18446 	{
18447 	    if (!eap->skip)
18448 		EMSG2(_(e_invarg2), eap->arg);
18449 	    break;
18450 	}
18451     }
18452     ++p;	/* skip the ')' */
18453 
18454     /* find extra arguments "range", "dict" and "abort" */
18455     for (;;)
18456     {
18457 	p = skipwhite(p);
18458 	if (STRNCMP(p, "range", 5) == 0)
18459 	{
18460 	    flags |= FC_RANGE;
18461 	    p += 5;
18462 	}
18463 	else if (STRNCMP(p, "dict", 4) == 0)
18464 	{
18465 	    flags |= FC_DICT;
18466 	    p += 4;
18467 	}
18468 	else if (STRNCMP(p, "abort", 5) == 0)
18469 	{
18470 	    flags |= FC_ABORT;
18471 	    p += 5;
18472 	}
18473 	else
18474 	    break;
18475     }
18476 
18477     /* When there is a line break use what follows for the function body.
18478      * Makes 'exe "func Test()\n...\nendfunc"' work. */
18479     if (*p == '\n')
18480 	line_arg = p + 1;
18481     else if (*p != NUL && *p != '"' && !eap->skip && !did_emsg)
18482 	EMSG(_(e_trailing));
18483 
18484     /*
18485      * Read the body of the function, until ":endfunction" is found.
18486      */
18487     if (KeyTyped)
18488     {
18489 	/* Check if the function already exists, don't let the user type the
18490 	 * whole function before telling him it doesn't work!  For a script we
18491 	 * need to skip the body to be able to find what follows. */
18492 	if (!eap->skip && !eap->forceit)
18493 	{
18494 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
18495 		EMSG(_(e_funcdict));
18496 	    else if (name != NULL && find_func(name) != NULL)
18497 		emsg_funcname(e_funcexts, name);
18498 	}
18499 
18500 	if (!eap->skip && did_emsg)
18501 	    goto erret;
18502 
18503 	msg_putchar('\n');	    /* don't overwrite the function name */
18504 	cmdline_row = msg_row;
18505     }
18506 
18507     indent = 2;
18508     nesting = 0;
18509     for (;;)
18510     {
18511 	msg_scroll = TRUE;
18512 	need_wait_return = FALSE;
18513 	sourcing_lnum_off = sourcing_lnum;
18514 
18515 	if (line_arg != NULL)
18516 	{
18517 	    /* Use eap->arg, split up in parts by line breaks. */
18518 	    theline = line_arg;
18519 	    p = vim_strchr(theline, '\n');
18520 	    if (p == NULL)
18521 		line_arg += STRLEN(line_arg);
18522 	    else
18523 	    {
18524 		*p = NUL;
18525 		line_arg = p + 1;
18526 	    }
18527 	}
18528 	else if (eap->getline == NULL)
18529 	    theline = getcmdline(':', 0L, indent);
18530 	else
18531 	    theline = eap->getline(':', eap->cookie, indent);
18532 	if (KeyTyped)
18533 	    lines_left = Rows - 1;
18534 	if (theline == NULL)
18535 	{
18536 	    EMSG(_("E126: Missing :endfunction"));
18537 	    goto erret;
18538 	}
18539 
18540 	/* Detect line continuation: sourcing_lnum increased more than one. */
18541 	if (sourcing_lnum > sourcing_lnum_off + 1)
18542 	    sourcing_lnum_off = sourcing_lnum - sourcing_lnum_off - 1;
18543 	else
18544 	    sourcing_lnum_off = 0;
18545 
18546 	if (skip_until != NULL)
18547 	{
18548 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
18549 	     * don't check for ":endfunc". */
18550 	    if (STRCMP(theline, skip_until) == 0)
18551 	    {
18552 		vim_free(skip_until);
18553 		skip_until = NULL;
18554 	    }
18555 	}
18556 	else
18557 	{
18558 	    /* skip ':' and blanks*/
18559 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
18560 		;
18561 
18562 	    /* Check for "endfunction". */
18563 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
18564 	    {
18565 		if (line_arg == NULL)
18566 		    vim_free(theline);
18567 		break;
18568 	    }
18569 
18570 	    /* Increase indent inside "if", "while", "for" and "try", decrease
18571 	     * at "end". */
18572 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
18573 		indent -= 2;
18574 	    else if (STRNCMP(p, "if", 2) == 0
18575 		    || STRNCMP(p, "wh", 2) == 0
18576 		    || STRNCMP(p, "for", 3) == 0
18577 		    || STRNCMP(p, "try", 3) == 0)
18578 		indent += 2;
18579 
18580 	    /* Check for defining a function inside this function. */
18581 	    if (checkforcmd(&p, "function", 2))
18582 	    {
18583 		if (*p == '!')
18584 		    p = skipwhite(p + 1);
18585 		p += eval_fname_script(p);
18586 		if (ASCII_ISALPHA(*p))
18587 		{
18588 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
18589 		    if (*skipwhite(p) == '(')
18590 		    {
18591 			++nesting;
18592 			indent += 2;
18593 		    }
18594 		}
18595 	    }
18596 
18597 	    /* Check for ":append" or ":insert". */
18598 	    p = skip_range(p, NULL);
18599 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
18600 		    || (p[0] == 'i'
18601 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
18602 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
18603 		skip_until = vim_strsave((char_u *)".");
18604 
18605 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
18606 	    arg = skipwhite(skiptowhite(p));
18607 	    if (arg[0] == '<' && arg[1] =='<'
18608 		    && ((p[0] == 'p' && p[1] == 'y'
18609 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
18610 			|| (p[0] == 'p' && p[1] == 'e'
18611 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
18612 			|| (p[0] == 't' && p[1] == 'c'
18613 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
18614 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
18615 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
18616 			|| (p[0] == 'm' && p[1] == 'z'
18617 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
18618 			))
18619 	    {
18620 		/* ":python <<" continues until a dot, like ":append" */
18621 		p = skipwhite(arg + 2);
18622 		if (*p == NUL)
18623 		    skip_until = vim_strsave((char_u *)".");
18624 		else
18625 		    skip_until = vim_strsave(p);
18626 	    }
18627 	}
18628 
18629 	/* Add the line to the function. */
18630 	if (ga_grow(&newlines, 1 + sourcing_lnum_off) == FAIL)
18631 	{
18632 	    if (line_arg == NULL)
18633 		vim_free(theline);
18634 	    goto erret;
18635 	}
18636 
18637 	/* Copy the line to newly allocated memory.  get_one_sourceline()
18638 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
18639 	 * is an extra alloc/free. */
18640 	p = vim_strsave(theline);
18641 	if (p != NULL)
18642 	{
18643 	    if (line_arg == NULL)
18644 		vim_free(theline);
18645 	    theline = p;
18646 	}
18647 
18648 	((char_u **)(newlines.ga_data))[newlines.ga_len++] = theline;
18649 
18650 	/* Add NULL lines for continuation lines, so that the line count is
18651 	 * equal to the index in the growarray.   */
18652 	while (sourcing_lnum_off-- > 0)
18653 	    ((char_u **)(newlines.ga_data))[newlines.ga_len++] = NULL;
18654 
18655 	/* Check for end of eap->arg. */
18656 	if (line_arg != NULL && *line_arg == NUL)
18657 	    line_arg = NULL;
18658     }
18659 
18660     /* Don't define the function when skipping commands or when an error was
18661      * detected. */
18662     if (eap->skip || did_emsg)
18663 	goto erret;
18664 
18665     /*
18666      * If there are no errors, add the function
18667      */
18668     if (fudi.fd_dict == NULL)
18669     {
18670 	v = find_var(name, &ht);
18671 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
18672 	{
18673 	    emsg_funcname("E707: Function name conflicts with variable: %s",
18674 									name);
18675 	    goto erret;
18676 	}
18677 
18678 	fp = find_func(name);
18679 	if (fp != NULL)
18680 	{
18681 	    if (!eap->forceit)
18682 	    {
18683 		emsg_funcname(e_funcexts, name);
18684 		goto erret;
18685 	    }
18686 	    if (fp->uf_calls > 0)
18687 	    {
18688 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
18689 									name);
18690 		goto erret;
18691 	    }
18692 	    /* redefine existing function */
18693 	    ga_clear_strings(&(fp->uf_args));
18694 	    ga_clear_strings(&(fp->uf_lines));
18695 	    vim_free(name);
18696 	    name = NULL;
18697 	}
18698     }
18699     else
18700     {
18701 	char	numbuf[20];
18702 
18703 	fp = NULL;
18704 	if (fudi.fd_newkey == NULL && !eap->forceit)
18705 	{
18706 	    EMSG(_(e_funcdict));
18707 	    goto erret;
18708 	}
18709 	if (fudi.fd_di == NULL)
18710 	{
18711 	    /* Can't add a function to a locked dictionary */
18712 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
18713 		goto erret;
18714 	}
18715 	    /* Can't change an existing function if it is locked */
18716 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
18717 	    goto erret;
18718 
18719 	/* Give the function a sequential number.  Can only be used with a
18720 	 * Funcref! */
18721 	vim_free(name);
18722 	sprintf(numbuf, "%d", ++func_nr);
18723 	name = vim_strsave((char_u *)numbuf);
18724 	if (name == NULL)
18725 	    goto erret;
18726     }
18727 
18728     if (fp == NULL)
18729     {
18730 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
18731 	{
18732 	    int	    slen, plen;
18733 	    char_u  *scriptname;
18734 
18735 	    /* Check that the autoload name matches the script name. */
18736 	    j = FAIL;
18737 	    if (sourcing_name != NULL)
18738 	    {
18739 		scriptname = autoload_name(name);
18740 		if (scriptname != NULL)
18741 		{
18742 		    p = vim_strchr(scriptname, '/');
18743 		    plen = (int)STRLEN(p);
18744 		    slen = (int)STRLEN(sourcing_name);
18745 		    if (slen > plen && fnamecmp(p,
18746 					    sourcing_name + slen - plen) == 0)
18747 			j = OK;
18748 		    vim_free(scriptname);
18749 		}
18750 	    }
18751 	    if (j == FAIL)
18752 	    {
18753 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
18754 		goto erret;
18755 	    }
18756 	}
18757 
18758 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
18759 	if (fp == NULL)
18760 	    goto erret;
18761 
18762 	if (fudi.fd_dict != NULL)
18763 	{
18764 	    if (fudi.fd_di == NULL)
18765 	    {
18766 		/* add new dict entry */
18767 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
18768 		if (fudi.fd_di == NULL)
18769 		{
18770 		    vim_free(fp);
18771 		    goto erret;
18772 		}
18773 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
18774 		{
18775 		    vim_free(fudi.fd_di);
18776 		    goto erret;
18777 		}
18778 	    }
18779 	    else
18780 		/* overwrite existing dict entry */
18781 		clear_tv(&fudi.fd_di->di_tv);
18782 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
18783 	    fudi.fd_di->di_tv.v_lock = 0;
18784 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
18785 	    fp->uf_refcount = 1;
18786 
18787 	    /* behave like "dict" was used */
18788 	    flags |= FC_DICT;
18789 	}
18790 
18791 	/* insert the new function in the function list */
18792 	STRCPY(fp->uf_name, name);
18793 	hash_add(&func_hashtab, UF2HIKEY(fp));
18794     }
18795     fp->uf_args = newargs;
18796     fp->uf_lines = newlines;
18797 #ifdef FEAT_PROFILE
18798     fp->uf_tml_count = NULL;
18799     fp->uf_tml_total = NULL;
18800     fp->uf_tml_self = NULL;
18801     fp->uf_profiling = FALSE;
18802     if (prof_def_func())
18803 	func_do_profile(fp);
18804 #endif
18805     fp->uf_varargs = varargs;
18806     fp->uf_flags = flags;
18807     fp->uf_calls = 0;
18808     fp->uf_script_ID = current_SID;
18809     goto ret_free;
18810 
18811 erret:
18812     ga_clear_strings(&newargs);
18813     ga_clear_strings(&newlines);
18814 ret_free:
18815     vim_free(skip_until);
18816     vim_free(fudi.fd_newkey);
18817     vim_free(name);
18818     did_emsg |= saved_did_emsg;
18819 }
18820 
18821 /*
18822  * Get a function name, translating "<SID>" and "<SNR>".
18823  * Also handles a Funcref in a List or Dictionary.
18824  * Returns the function name in allocated memory, or NULL for failure.
18825  * flags:
18826  * TFN_INT:   internal function name OK
18827  * TFN_QUIET: be quiet
18828  * Advances "pp" to just after the function name (if no error).
18829  */
18830     static char_u *
18831 trans_function_name(pp, skip, flags, fdp)
18832     char_u	**pp;
18833     int		skip;		/* only find the end, don't evaluate */
18834     int		flags;
18835     funcdict_T	*fdp;		/* return: info about dictionary used */
18836 {
18837     char_u	*name = NULL;
18838     char_u	*start;
18839     char_u	*end;
18840     int		lead;
18841     char_u	sid_buf[20];
18842     int		len;
18843     lval_T	lv;
18844 
18845     if (fdp != NULL)
18846 	vim_memset(fdp, 0, sizeof(funcdict_T));
18847     start = *pp;
18848 
18849     /* Check for hard coded <SNR>: already translated function ID (from a user
18850      * command). */
18851     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
18852 						   && (*pp)[2] == (int)KE_SNR)
18853     {
18854 	*pp += 3;
18855 	len = get_id_len(pp) + 3;
18856 	return vim_strnsave(start, len);
18857     }
18858 
18859     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
18860      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
18861     lead = eval_fname_script(start);
18862     if (lead > 2)
18863 	start += lead;
18864 
18865     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
18866 					      lead > 2 ? 0 : FNE_CHECK_START);
18867     if (end == start)
18868     {
18869 	if (!skip)
18870 	    EMSG(_("E129: Function name required"));
18871 	goto theend;
18872     }
18873     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
18874     {
18875 	/*
18876 	 * Report an invalid expression in braces, unless the expression
18877 	 * evaluation has been cancelled due to an aborting error, an
18878 	 * interrupt, or an exception.
18879 	 */
18880 	if (!aborting())
18881 	{
18882 	    if (end != NULL)
18883 		EMSG2(_(e_invarg2), start);
18884 	}
18885 	else
18886 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
18887 	goto theend;
18888     }
18889 
18890     if (lv.ll_tv != NULL)
18891     {
18892 	if (fdp != NULL)
18893 	{
18894 	    fdp->fd_dict = lv.ll_dict;
18895 	    fdp->fd_newkey = lv.ll_newkey;
18896 	    lv.ll_newkey = NULL;
18897 	    fdp->fd_di = lv.ll_di;
18898 	}
18899 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
18900 	{
18901 	    name = vim_strsave(lv.ll_tv->vval.v_string);
18902 	    *pp = end;
18903 	}
18904 	else
18905 	{
18906 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
18907 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
18908 		EMSG(_(e_funcref));
18909 	    else
18910 		*pp = end;
18911 	    name = NULL;
18912 	}
18913 	goto theend;
18914     }
18915 
18916     if (lv.ll_name == NULL)
18917     {
18918 	/* Error found, but continue after the function name. */
18919 	*pp = end;
18920 	goto theend;
18921     }
18922 
18923     if (lv.ll_exp_name != NULL)
18924     {
18925 	len = (int)STRLEN(lv.ll_exp_name);
18926 	if (lead <= 2 && lv.ll_name == lv.ll_exp_name
18927 					 && STRNCMP(lv.ll_name, "s:", 2) == 0)
18928 	{
18929 	    /* When there was "s:" already or the name expanded to get a
18930 	     * leading "s:" then remove it. */
18931 	    lv.ll_name += 2;
18932 	    len -= 2;
18933 	    lead = 2;
18934 	}
18935     }
18936     else
18937     {
18938 	if (lead == 2)	/* skip over "s:" */
18939 	    lv.ll_name += 2;
18940 	len = (int)(end - lv.ll_name);
18941     }
18942 
18943     /*
18944      * Copy the function name to allocated memory.
18945      * Accept <SID>name() inside a script, translate into <SNR>123_name().
18946      * Accept <SNR>123_name() outside a script.
18947      */
18948     if (skip)
18949 	lead = 0;	/* do nothing */
18950     else if (lead > 0)
18951     {
18952 	lead = 3;
18953 	if (eval_fname_sid(lv.ll_exp_name != NULL ? lv.ll_exp_name : *pp))
18954 	{
18955 	    /* It's "s:" or "<SID>" */
18956 	    if (current_SID <= 0)
18957 	    {
18958 		EMSG(_(e_usingsid));
18959 		goto theend;
18960 	    }
18961 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
18962 	    lead += (int)STRLEN(sid_buf);
18963 	}
18964     }
18965     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
18966     {
18967 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
18968 	goto theend;
18969     }
18970     name = alloc((unsigned)(len + lead + 1));
18971     if (name != NULL)
18972     {
18973 	if (lead > 0)
18974 	{
18975 	    name[0] = K_SPECIAL;
18976 	    name[1] = KS_EXTRA;
18977 	    name[2] = (int)KE_SNR;
18978 	    if (lead > 3)	/* If it's "<SID>" */
18979 		STRCPY(name + 3, sid_buf);
18980 	}
18981 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
18982 	name[len + lead] = NUL;
18983     }
18984     *pp = end;
18985 
18986 theend:
18987     clear_lval(&lv);
18988     return name;
18989 }
18990 
18991 /*
18992  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
18993  * Return 2 if "p" starts with "s:".
18994  * Return 0 otherwise.
18995  */
18996     static int
18997 eval_fname_script(p)
18998     char_u	*p;
18999 {
19000     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
19001 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
19002 	return 5;
19003     if (p[0] == 's' && p[1] == ':')
19004 	return 2;
19005     return 0;
19006 }
19007 
19008 /*
19009  * Return TRUE if "p" starts with "<SID>" or "s:".
19010  * Only works if eval_fname_script() returned non-zero for "p"!
19011  */
19012     static int
19013 eval_fname_sid(p)
19014     char_u	*p;
19015 {
19016     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
19017 }
19018 
19019 /*
19020  * List the head of the function: "name(arg1, arg2)".
19021  */
19022     static void
19023 list_func_head(fp, indent)
19024     ufunc_T	*fp;
19025     int		indent;
19026 {
19027     int		j;
19028 
19029     msg_start();
19030     if (indent)
19031 	MSG_PUTS("   ");
19032     MSG_PUTS("function ");
19033     if (fp->uf_name[0] == K_SPECIAL)
19034     {
19035 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
19036 	msg_puts(fp->uf_name + 3);
19037     }
19038     else
19039 	msg_puts(fp->uf_name);
19040     msg_putchar('(');
19041     for (j = 0; j < fp->uf_args.ga_len; ++j)
19042     {
19043 	if (j)
19044 	    MSG_PUTS(", ");
19045 	msg_puts(FUNCARG(fp, j));
19046     }
19047     if (fp->uf_varargs)
19048     {
19049 	if (j)
19050 	    MSG_PUTS(", ");
19051 	MSG_PUTS("...");
19052     }
19053     msg_putchar(')');
19054     msg_clr_eos();
19055     if (p_verbose > 0)
19056 	last_set_msg(fp->uf_script_ID);
19057 }
19058 
19059 /*
19060  * Find a function by name, return pointer to it in ufuncs.
19061  * Return NULL for unknown function.
19062  */
19063     static ufunc_T *
19064 find_func(name)
19065     char_u	*name;
19066 {
19067     hashitem_T	*hi;
19068 
19069     hi = hash_find(&func_hashtab, name);
19070     if (!HASHITEM_EMPTY(hi))
19071 	return HI2UF(hi);
19072     return NULL;
19073 }
19074 
19075 #if defined(EXITFREE) || defined(PROTO)
19076     void
19077 free_all_functions()
19078 {
19079     hashitem_T	*hi;
19080 
19081     /* Need to start all over every time, because func_free() may change the
19082      * hash table. */
19083     while (func_hashtab.ht_used > 0)
19084 	for (hi = func_hashtab.ht_array; ; ++hi)
19085 	    if (!HASHITEM_EMPTY(hi))
19086 	    {
19087 		func_free(HI2UF(hi));
19088 		break;
19089 	    }
19090 }
19091 #endif
19092 
19093 /*
19094  * Return TRUE if a function "name" exists.
19095  */
19096     static int
19097 function_exists(name)
19098     char_u *name;
19099 {
19100     char_u  *p = name;
19101     int	    n = FALSE;
19102 
19103     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
19104     if (p != NULL)
19105     {
19106 	if (builtin_function(p))
19107 	    n = (find_internal_func(p) >= 0);
19108 	else
19109 	    n = (find_func(p) != NULL);
19110 	vim_free(p);
19111     }
19112     return n;
19113 }
19114 
19115 /*
19116  * Return TRUE if "name" looks like a builtin function name: starts with a
19117  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
19118  */
19119     static int
19120 builtin_function(name)
19121     char_u *name;
19122 {
19123     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
19124 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
19125 }
19126 
19127 #if defined(FEAT_PROFILE) || defined(PROTO)
19128 /*
19129  * Start profiling function "fp".
19130  */
19131     static void
19132 func_do_profile(fp)
19133     ufunc_T	*fp;
19134 {
19135     fp->uf_tm_count = 0;
19136     profile_zero(&fp->uf_tm_self);
19137     profile_zero(&fp->uf_tm_total);
19138     if (fp->uf_tml_count == NULL)
19139 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
19140 					 (sizeof(int) * fp->uf_lines.ga_len));
19141     if (fp->uf_tml_total == NULL)
19142 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
19143 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
19144     if (fp->uf_tml_self == NULL)
19145 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
19146 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
19147     fp->uf_tml_idx = -1;
19148     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
19149 						   || fp->uf_tml_self == NULL)
19150 	return;	    /* out of memory */
19151 
19152     fp->uf_profiling = TRUE;
19153 }
19154 
19155 /*
19156  * Dump the profiling results for all functions in file "fd".
19157  */
19158     void
19159 func_dump_profile(fd)
19160     FILE    *fd;
19161 {
19162     hashitem_T	*hi;
19163     int		todo;
19164     ufunc_T	*fp;
19165     int		i;
19166     ufunc_T	**sorttab;
19167     int		st_len = 0;
19168 
19169     todo = (int)func_hashtab.ht_used;
19170     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
19171 
19172     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
19173     {
19174 	if (!HASHITEM_EMPTY(hi))
19175 	{
19176 	    --todo;
19177 	    fp = HI2UF(hi);
19178 	    if (fp->uf_profiling)
19179 	    {
19180 		if (sorttab != NULL)
19181 		    sorttab[st_len++] = fp;
19182 
19183 		if (fp->uf_name[0] == K_SPECIAL)
19184 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
19185 		else
19186 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
19187 		if (fp->uf_tm_count == 1)
19188 		    fprintf(fd, "Called 1 time\n");
19189 		else
19190 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
19191 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
19192 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
19193 		fprintf(fd, "\n");
19194 		fprintf(fd, "count  total (s)   self (s)\n");
19195 
19196 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
19197 		{
19198 		    if (FUNCLINE(fp, i) == NULL)
19199 			continue;
19200 		    prof_func_line(fd, fp->uf_tml_count[i],
19201 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
19202 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
19203 		}
19204 		fprintf(fd, "\n");
19205 	    }
19206 	}
19207     }
19208 
19209     if (sorttab != NULL && st_len > 0)
19210     {
19211 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
19212 							      prof_total_cmp);
19213 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
19214 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
19215 							      prof_self_cmp);
19216 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
19217     }
19218 }
19219 
19220     static void
19221 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
19222     FILE	*fd;
19223     ufunc_T	**sorttab;
19224     int		st_len;
19225     char	*title;
19226     int		prefer_self;	/* when equal print only self time */
19227 {
19228     int		i;
19229     ufunc_T	*fp;
19230 
19231     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
19232     fprintf(fd, "count  total (s)   self (s)  function\n");
19233     for (i = 0; i < 20 && i < st_len; ++i)
19234     {
19235 	fp = sorttab[i];
19236 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
19237 								 prefer_self);
19238 	if (fp->uf_name[0] == K_SPECIAL)
19239 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
19240 	else
19241 	    fprintf(fd, " %s()\n", fp->uf_name);
19242     }
19243     fprintf(fd, "\n");
19244 }
19245 
19246 /*
19247  * Print the count and times for one function or function line.
19248  */
19249     static void
19250 prof_func_line(fd, count, total, self, prefer_self)
19251     FILE	*fd;
19252     int		count;
19253     proftime_T	*total;
19254     proftime_T	*self;
19255     int		prefer_self;	/* when equal print only self time */
19256 {
19257     if (count > 0)
19258     {
19259 	fprintf(fd, "%5d ", count);
19260 	if (prefer_self && profile_equal(total, self))
19261 	    fprintf(fd, "           ");
19262 	else
19263 	    fprintf(fd, "%s ", profile_msg(total));
19264 	if (!prefer_self && profile_equal(total, self))
19265 	    fprintf(fd, "           ");
19266 	else
19267 	    fprintf(fd, "%s ", profile_msg(self));
19268     }
19269     else
19270 	fprintf(fd, "                            ");
19271 }
19272 
19273 /*
19274  * Compare function for total time sorting.
19275  */
19276     static int
19277 #ifdef __BORLANDC__
19278 _RTLENTRYF
19279 #endif
19280 prof_total_cmp(s1, s2)
19281     const void	*s1;
19282     const void	*s2;
19283 {
19284     ufunc_T	*p1, *p2;
19285 
19286     p1 = *(ufunc_T **)s1;
19287     p2 = *(ufunc_T **)s2;
19288     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
19289 }
19290 
19291 /*
19292  * Compare function for self time sorting.
19293  */
19294     static int
19295 #ifdef __BORLANDC__
19296 _RTLENTRYF
19297 #endif
19298 prof_self_cmp(s1, s2)
19299     const void	*s1;
19300     const void	*s2;
19301 {
19302     ufunc_T	*p1, *p2;
19303 
19304     p1 = *(ufunc_T **)s1;
19305     p2 = *(ufunc_T **)s2;
19306     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
19307 }
19308 
19309 #endif
19310 
19311 /* The names of packages that once were loaded is remembered. */
19312 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
19313 
19314 /*
19315  * If "name" has a package name try autoloading the script for it.
19316  * Return TRUE if a package was loaded.
19317  */
19318     static int
19319 script_autoload(name, reload)
19320     char_u	*name;
19321     int		reload;	    /* load script again when already loaded */
19322 {
19323     char_u	*p;
19324     char_u	*scriptname, *tofree;
19325     int		ret = FALSE;
19326     int		i;
19327 
19328     /* If there is no '#' after name[0] there is no package name. */
19329     p = vim_strchr(name, AUTOLOAD_CHAR);
19330     if (p == NULL || p == name)
19331 	return FALSE;
19332 
19333     tofree = scriptname = autoload_name(name);
19334 
19335     /* Find the name in the list of previously loaded package names.  Skip
19336      * "autoload/", it's always the same. */
19337     for (i = 0; i < ga_loaded.ga_len; ++i)
19338 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
19339 	    break;
19340     if (!reload && i < ga_loaded.ga_len)
19341 	ret = FALSE;	    /* was loaded already */
19342     else
19343     {
19344 	/* Remember the name if it wasn't loaded already. */
19345 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
19346 	{
19347 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
19348 	    tofree = NULL;
19349 	}
19350 
19351 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
19352 	if (source_runtime(scriptname, FALSE) == OK)
19353 	    ret = TRUE;
19354     }
19355 
19356     vim_free(tofree);
19357     return ret;
19358 }
19359 
19360 /*
19361  * Return the autoload script name for a function or variable name.
19362  * Returns NULL when out of memory.
19363  */
19364     static char_u *
19365 autoload_name(name)
19366     char_u	*name;
19367 {
19368     char_u	*p;
19369     char_u	*scriptname;
19370 
19371     /* Get the script file name: replace '#' with '/', append ".vim". */
19372     scriptname = alloc((unsigned)(STRLEN(name) + 14));
19373     if (scriptname == NULL)
19374 	return FALSE;
19375     STRCPY(scriptname, "autoload/");
19376     STRCAT(scriptname, name);
19377     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
19378     STRCAT(scriptname, ".vim");
19379     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
19380 	*p = '/';
19381     return scriptname;
19382 }
19383 
19384 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
19385 
19386 /*
19387  * Function given to ExpandGeneric() to obtain the list of user defined
19388  * function names.
19389  */
19390     char_u *
19391 get_user_func_name(xp, idx)
19392     expand_T	*xp;
19393     int		idx;
19394 {
19395     static long_u	done;
19396     static hashitem_T	*hi;
19397     ufunc_T		*fp;
19398 
19399     if (idx == 0)
19400     {
19401 	done = 0;
19402 	hi = func_hashtab.ht_array;
19403     }
19404     if (done < func_hashtab.ht_used)
19405     {
19406 	if (done++ > 0)
19407 	    ++hi;
19408 	while (HASHITEM_EMPTY(hi))
19409 	    ++hi;
19410 	fp = HI2UF(hi);
19411 
19412 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
19413 	    return fp->uf_name;	/* prevents overflow */
19414 
19415 	cat_func_name(IObuff, fp);
19416 	if (xp->xp_context != EXPAND_USER_FUNC)
19417 	{
19418 	    STRCAT(IObuff, "(");
19419 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
19420 		STRCAT(IObuff, ")");
19421 	}
19422 	return IObuff;
19423     }
19424     return NULL;
19425 }
19426 
19427 #endif /* FEAT_CMDL_COMPL */
19428 
19429 /*
19430  * Copy the function name of "fp" to buffer "buf".
19431  * "buf" must be able to hold the function name plus three bytes.
19432  * Takes care of script-local function names.
19433  */
19434     static void
19435 cat_func_name(buf, fp)
19436     char_u	*buf;
19437     ufunc_T	*fp;
19438 {
19439     if (fp->uf_name[0] == K_SPECIAL)
19440     {
19441 	STRCPY(buf, "<SNR>");
19442 	STRCAT(buf, fp->uf_name + 3);
19443     }
19444     else
19445 	STRCPY(buf, fp->uf_name);
19446 }
19447 
19448 /*
19449  * ":delfunction {name}"
19450  */
19451     void
19452 ex_delfunction(eap)
19453     exarg_T	*eap;
19454 {
19455     ufunc_T	*fp = NULL;
19456     char_u	*p;
19457     char_u	*name;
19458     funcdict_T	fudi;
19459 
19460     p = eap->arg;
19461     name = trans_function_name(&p, eap->skip, 0, &fudi);
19462     vim_free(fudi.fd_newkey);
19463     if (name == NULL)
19464     {
19465 	if (fudi.fd_dict != NULL && !eap->skip)
19466 	    EMSG(_(e_funcref));
19467 	return;
19468     }
19469     if (!ends_excmd(*skipwhite(p)))
19470     {
19471 	vim_free(name);
19472 	EMSG(_(e_trailing));
19473 	return;
19474     }
19475     eap->nextcmd = check_nextcmd(p);
19476     if (eap->nextcmd != NULL)
19477 	*p = NUL;
19478 
19479     if (!eap->skip)
19480 	fp = find_func(name);
19481     vim_free(name);
19482 
19483     if (!eap->skip)
19484     {
19485 	if (fp == NULL)
19486 	{
19487 	    EMSG2(_(e_nofunc), eap->arg);
19488 	    return;
19489 	}
19490 	if (fp->uf_calls > 0)
19491 	{
19492 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
19493 	    return;
19494 	}
19495 
19496 	if (fudi.fd_dict != NULL)
19497 	{
19498 	    /* Delete the dict item that refers to the function, it will
19499 	     * invoke func_unref() and possibly delete the function. */
19500 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
19501 	}
19502 	else
19503 	    func_free(fp);
19504     }
19505 }
19506 
19507 /*
19508  * Free a function and remove it from the list of functions.
19509  */
19510     static void
19511 func_free(fp)
19512     ufunc_T *fp;
19513 {
19514     hashitem_T	*hi;
19515 
19516     /* clear this function */
19517     ga_clear_strings(&(fp->uf_args));
19518     ga_clear_strings(&(fp->uf_lines));
19519 #ifdef FEAT_PROFILE
19520     vim_free(fp->uf_tml_count);
19521     vim_free(fp->uf_tml_total);
19522     vim_free(fp->uf_tml_self);
19523 #endif
19524 
19525     /* remove the function from the function hashtable */
19526     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
19527     if (HASHITEM_EMPTY(hi))
19528 	EMSG2(_(e_intern2), "func_free()");
19529     else
19530 	hash_remove(&func_hashtab, hi);
19531 
19532     vim_free(fp);
19533 }
19534 
19535 /*
19536  * Unreference a Function: decrement the reference count and free it when it
19537  * becomes zero.  Only for numbered functions.
19538  */
19539     static void
19540 func_unref(name)
19541     char_u	*name;
19542 {
19543     ufunc_T *fp;
19544 
19545     if (name != NULL && isdigit(*name))
19546     {
19547 	fp = find_func(name);
19548 	if (fp == NULL)
19549 	    EMSG2(_(e_intern2), "func_unref()");
19550 	else if (--fp->uf_refcount <= 0)
19551 	{
19552 	    /* Only delete it when it's not being used.  Otherwise it's done
19553 	     * when "uf_calls" becomes zero. */
19554 	    if (fp->uf_calls == 0)
19555 		func_free(fp);
19556 	}
19557     }
19558 }
19559 
19560 /*
19561  * Count a reference to a Function.
19562  */
19563     static void
19564 func_ref(name)
19565     char_u	*name;
19566 {
19567     ufunc_T *fp;
19568 
19569     if (name != NULL && isdigit(*name))
19570     {
19571 	fp = find_func(name);
19572 	if (fp == NULL)
19573 	    EMSG2(_(e_intern2), "func_ref()");
19574 	else
19575 	    ++fp->uf_refcount;
19576     }
19577 }
19578 
19579 /*
19580  * Call a user function.
19581  */
19582     static void
19583 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
19584     ufunc_T	*fp;		/* pointer to function */
19585     int		argcount;	/* nr of args */
19586     typval_T	*argvars;	/* arguments */
19587     typval_T	*rettv;		/* return value */
19588     linenr_T	firstline;	/* first line of range */
19589     linenr_T	lastline;	/* last line of range */
19590     dict_T	*selfdict;	/* Dictionary for "self" */
19591 {
19592     char_u	*save_sourcing_name;
19593     linenr_T	save_sourcing_lnum;
19594     scid_T	save_current_SID;
19595     funccall_T	fc;
19596     int		save_did_emsg;
19597     static int	depth = 0;
19598     dictitem_T	*v;
19599     int		fixvar_idx = 0;	/* index in fixvar[] */
19600     int		i;
19601     int		ai;
19602     char_u	numbuf[NUMBUFLEN];
19603     char_u	*name;
19604 #ifdef FEAT_PROFILE
19605     proftime_T	wait_start;
19606 #endif
19607 
19608     /* If depth of calling is getting too high, don't execute the function */
19609     if (depth >= p_mfd)
19610     {
19611 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
19612 	rettv->v_type = VAR_NUMBER;
19613 	rettv->vval.v_number = -1;
19614 	return;
19615     }
19616     ++depth;
19617 
19618     line_breakcheck();		/* check for CTRL-C hit */
19619 
19620     fc.caller = current_funccal;
19621     current_funccal = &fc;
19622     fc.func = fp;
19623     fc.rettv = rettv;
19624     rettv->vval.v_number = 0;
19625     fc.linenr = 0;
19626     fc.returned = FALSE;
19627     fc.level = ex_nesting_level;
19628     /* Check if this function has a breakpoint. */
19629     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
19630     fc.dbg_tick = debug_tick;
19631 
19632     /*
19633      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
19634      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
19635      * each argument variable and saves a lot of time.
19636      */
19637     /*
19638      * Init l: variables.
19639      */
19640     init_var_dict(&fc.l_vars, &fc.l_vars_var);
19641     if (selfdict != NULL)
19642     {
19643 	/* Set l:self to "selfdict".  Use "name" to avoid a warning from
19644 	 * some compiler that checks the destination size. */
19645 	v = &fc.fixvar[fixvar_idx++].var;
19646 	name = v->di_key;
19647 	STRCPY(name, "self");
19648 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
19649 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
19650 	v->di_tv.v_type = VAR_DICT;
19651 	v->di_tv.v_lock = 0;
19652 	v->di_tv.vval.v_dict = selfdict;
19653 	++selfdict->dv_refcount;
19654     }
19655 
19656     /*
19657      * Init a: variables.
19658      * Set a:0 to "argcount".
19659      * Set a:000 to a list with room for the "..." arguments.
19660      */
19661     init_var_dict(&fc.l_avars, &fc.l_avars_var);
19662     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
19663 				(varnumber_T)(argcount - fp->uf_args.ga_len));
19664     v = &fc.fixvar[fixvar_idx++].var;
19665     STRCPY(v->di_key, "000");
19666     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19667     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19668     v->di_tv.v_type = VAR_LIST;
19669     v->di_tv.v_lock = VAR_FIXED;
19670     v->di_tv.vval.v_list = &fc.l_varlist;
19671     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
19672     fc.l_varlist.lv_refcount = 99999;
19673 
19674     /*
19675      * Set a:firstline to "firstline" and a:lastline to "lastline".
19676      * Set a:name to named arguments.
19677      * Set a:N to the "..." arguments.
19678      */
19679     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
19680 						      (varnumber_T)firstline);
19681     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
19682 						       (varnumber_T)lastline);
19683     for (i = 0; i < argcount; ++i)
19684     {
19685 	ai = i - fp->uf_args.ga_len;
19686 	if (ai < 0)
19687 	    /* named argument a:name */
19688 	    name = FUNCARG(fp, i);
19689 	else
19690 	{
19691 	    /* "..." argument a:1, a:2, etc. */
19692 	    sprintf((char *)numbuf, "%d", ai + 1);
19693 	    name = numbuf;
19694 	}
19695 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
19696 	{
19697 	    v = &fc.fixvar[fixvar_idx++].var;
19698 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19699 	}
19700 	else
19701 	{
19702 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
19703 							     + STRLEN(name)));
19704 	    if (v == NULL)
19705 		break;
19706 	    v->di_flags = DI_FLAGS_RO;
19707 	}
19708 	STRCPY(v->di_key, name);
19709 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19710 
19711 	/* Note: the values are copied directly to avoid alloc/free.
19712 	 * "argvars" must have VAR_FIXED for v_lock. */
19713 	v->di_tv = argvars[i];
19714 	v->di_tv.v_lock = VAR_FIXED;
19715 
19716 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
19717 	{
19718 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
19719 	    fc.l_listitems[ai].li_tv = argvars[i];
19720 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
19721 	}
19722     }
19723 
19724     /* Don't redraw while executing the function. */
19725     ++RedrawingDisabled;
19726     save_sourcing_name = sourcing_name;
19727     save_sourcing_lnum = sourcing_lnum;
19728     sourcing_lnum = 1;
19729     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
19730 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
19731     if (sourcing_name != NULL)
19732     {
19733 	if (save_sourcing_name != NULL
19734 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
19735 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
19736 	else
19737 	    STRCPY(sourcing_name, "function ");
19738 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
19739 
19740 	if (p_verbose >= 12)
19741 	{
19742 	    ++no_wait_return;
19743 	    verbose_enter_scroll();
19744 
19745 	    smsg((char_u *)_("calling %s"), sourcing_name);
19746 	    if (p_verbose >= 14)
19747 	    {
19748 		char_u	buf[MSG_BUF_LEN];
19749 		char_u	numbuf[NUMBUFLEN];
19750 		char_u	*tofree;
19751 
19752 		msg_puts((char_u *)"(");
19753 		for (i = 0; i < argcount; ++i)
19754 		{
19755 		    if (i > 0)
19756 			msg_puts((char_u *)", ");
19757 		    if (argvars[i].v_type == VAR_NUMBER)
19758 			msg_outnum((long)argvars[i].vval.v_number);
19759 		    else
19760 		    {
19761 			trunc_string(tv2string(&argvars[i], &tofree, numbuf, 0),
19762 							    buf, MSG_BUF_CLEN);
19763 			msg_puts(buf);
19764 			vim_free(tofree);
19765 		    }
19766 		}
19767 		msg_puts((char_u *)")");
19768 	    }
19769 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
19770 
19771 	    verbose_leave_scroll();
19772 	    --no_wait_return;
19773 	}
19774     }
19775 #ifdef FEAT_PROFILE
19776     if (do_profiling == PROF_YES)
19777     {
19778 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
19779 	    func_do_profile(fp);
19780 	if (fp->uf_profiling
19781 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
19782 	{
19783 	    ++fp->uf_tm_count;
19784 	    profile_start(&fp->uf_tm_start);
19785 	    profile_zero(&fp->uf_tm_children);
19786 	}
19787 	script_prof_save(&wait_start);
19788     }
19789 #endif
19790 
19791     save_current_SID = current_SID;
19792     current_SID = fp->uf_script_ID;
19793     save_did_emsg = did_emsg;
19794     did_emsg = FALSE;
19795 
19796     /* call do_cmdline() to execute the lines */
19797     do_cmdline(NULL, get_func_line, (void *)&fc,
19798 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
19799 
19800     --RedrawingDisabled;
19801 
19802     /* when the function was aborted because of an error, return -1 */
19803     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
19804     {
19805 	clear_tv(rettv);
19806 	rettv->v_type = VAR_NUMBER;
19807 	rettv->vval.v_number = -1;
19808     }
19809 
19810 #ifdef FEAT_PROFILE
19811     if (do_profiling == PROF_YES && (fp->uf_profiling
19812 		    || (fc.caller != NULL && &fc.caller->func->uf_profiling)))
19813     {
19814 	profile_end(&fp->uf_tm_start);
19815 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
19816 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
19817 	profile_self(&fp->uf_tm_self, &fp->uf_tm_start, &fp->uf_tm_children);
19818 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
19819 	{
19820 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
19821 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
19822 	}
19823     }
19824 #endif
19825 
19826     /* when being verbose, mention the return value */
19827     if (p_verbose >= 12)
19828     {
19829 	++no_wait_return;
19830 	verbose_enter_scroll();
19831 
19832 	if (aborting())
19833 	    smsg((char_u *)_("%s aborted"), sourcing_name);
19834 	else if (fc.rettv->v_type == VAR_NUMBER)
19835 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
19836 					       (long)fc.rettv->vval.v_number);
19837 	else
19838 	{
19839 	    char_u	buf[MSG_BUF_LEN];
19840 	    char_u	numbuf[NUMBUFLEN];
19841 	    char_u	*tofree;
19842 
19843 	    /* The value may be very long.  Skip the middle part, so that we
19844 	     * have some idea how it starts and ends. smsg() would always
19845 	     * truncate it at the end. */
19846 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf, 0),
19847 							   buf, MSG_BUF_CLEN);
19848 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
19849 	    vim_free(tofree);
19850 	}
19851 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19852 
19853 	verbose_leave_scroll();
19854 	--no_wait_return;
19855     }
19856 
19857     vim_free(sourcing_name);
19858     sourcing_name = save_sourcing_name;
19859     sourcing_lnum = save_sourcing_lnum;
19860     current_SID = save_current_SID;
19861 #ifdef FEAT_PROFILE
19862     if (do_profiling == PROF_YES)
19863 	script_prof_restore(&wait_start);
19864 #endif
19865 
19866     if (p_verbose >= 12 && sourcing_name != NULL)
19867     {
19868 	++no_wait_return;
19869 	verbose_enter_scroll();
19870 
19871 	smsg((char_u *)_("continuing in %s"), sourcing_name);
19872 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19873 
19874 	verbose_leave_scroll();
19875 	--no_wait_return;
19876     }
19877 
19878     did_emsg |= save_did_emsg;
19879     current_funccal = fc.caller;
19880 
19881     /* The a: variables typevals were not alloced, only free the allocated
19882      * variables. */
19883     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
19884 
19885     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
19886     --depth;
19887 }
19888 
19889 /*
19890  * Add a number variable "name" to dict "dp" with value "nr".
19891  */
19892     static void
19893 add_nr_var(dp, v, name, nr)
19894     dict_T	*dp;
19895     dictitem_T	*v;
19896     char	*name;
19897     varnumber_T nr;
19898 {
19899     STRCPY(v->di_key, name);
19900     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19901     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
19902     v->di_tv.v_type = VAR_NUMBER;
19903     v->di_tv.v_lock = VAR_FIXED;
19904     v->di_tv.vval.v_number = nr;
19905 }
19906 
19907 /*
19908  * ":return [expr]"
19909  */
19910     void
19911 ex_return(eap)
19912     exarg_T	*eap;
19913 {
19914     char_u	*arg = eap->arg;
19915     typval_T	rettv;
19916     int		returning = FALSE;
19917 
19918     if (current_funccal == NULL)
19919     {
19920 	EMSG(_("E133: :return not inside a function"));
19921 	return;
19922     }
19923 
19924     if (eap->skip)
19925 	++emsg_skip;
19926 
19927     eap->nextcmd = NULL;
19928     if ((*arg != NUL && *arg != '|' && *arg != '\n')
19929 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
19930     {
19931 	if (!eap->skip)
19932 	    returning = do_return(eap, FALSE, TRUE, &rettv);
19933 	else
19934 	    clear_tv(&rettv);
19935     }
19936     /* It's safer to return also on error. */
19937     else if (!eap->skip)
19938     {
19939 	/*
19940 	 * Return unless the expression evaluation has been cancelled due to an
19941 	 * aborting error, an interrupt, or an exception.
19942 	 */
19943 	if (!aborting())
19944 	    returning = do_return(eap, FALSE, TRUE, NULL);
19945     }
19946 
19947     /* When skipping or the return gets pending, advance to the next command
19948      * in this line (!returning).  Otherwise, ignore the rest of the line.
19949      * Following lines will be ignored by get_func_line(). */
19950     if (returning)
19951 	eap->nextcmd = NULL;
19952     else if (eap->nextcmd == NULL)	    /* no argument */
19953 	eap->nextcmd = check_nextcmd(arg);
19954 
19955     if (eap->skip)
19956 	--emsg_skip;
19957 }
19958 
19959 /*
19960  * Return from a function.  Possibly makes the return pending.  Also called
19961  * for a pending return at the ":endtry" or after returning from an extra
19962  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
19963  * when called due to a ":return" command.  "rettv" may point to a typval_T
19964  * with the return rettv.  Returns TRUE when the return can be carried out,
19965  * FALSE when the return gets pending.
19966  */
19967     int
19968 do_return(eap, reanimate, is_cmd, rettv)
19969     exarg_T	*eap;
19970     int		reanimate;
19971     int		is_cmd;
19972     void	*rettv;
19973 {
19974     int		idx;
19975     struct condstack *cstack = eap->cstack;
19976 
19977     if (reanimate)
19978 	/* Undo the return. */
19979 	current_funccal->returned = FALSE;
19980 
19981     /*
19982      * Cleanup (and inactivate) conditionals, but stop when a try conditional
19983      * not in its finally clause (which then is to be executed next) is found.
19984      * In this case, make the ":return" pending for execution at the ":endtry".
19985      * Otherwise, return normally.
19986      */
19987     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
19988     if (idx >= 0)
19989     {
19990 	cstack->cs_pending[idx] = CSTP_RETURN;
19991 
19992 	if (!is_cmd && !reanimate)
19993 	    /* A pending return again gets pending.  "rettv" points to an
19994 	     * allocated variable with the rettv of the original ":return"'s
19995 	     * argument if present or is NULL else. */
19996 	    cstack->cs_rettv[idx] = rettv;
19997 	else
19998 	{
19999 	    /* When undoing a return in order to make it pending, get the stored
20000 	     * return rettv. */
20001 	    if (reanimate)
20002 		rettv = current_funccal->rettv;
20003 
20004 	    if (rettv != NULL)
20005 	    {
20006 		/* Store the value of the pending return. */
20007 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
20008 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
20009 		else
20010 		    EMSG(_(e_outofmem));
20011 	    }
20012 	    else
20013 		cstack->cs_rettv[idx] = NULL;
20014 
20015 	    if (reanimate)
20016 	    {
20017 		/* The pending return value could be overwritten by a ":return"
20018 		 * without argument in a finally clause; reset the default
20019 		 * return value. */
20020 		current_funccal->rettv->v_type = VAR_NUMBER;
20021 		current_funccal->rettv->vval.v_number = 0;
20022 	    }
20023 	}
20024 	report_make_pending(CSTP_RETURN, rettv);
20025     }
20026     else
20027     {
20028 	current_funccal->returned = TRUE;
20029 
20030 	/* If the return is carried out now, store the return value.  For
20031 	 * a return immediately after reanimation, the value is already
20032 	 * there. */
20033 	if (!reanimate && rettv != NULL)
20034 	{
20035 	    clear_tv(current_funccal->rettv);
20036 	    *current_funccal->rettv = *(typval_T *)rettv;
20037 	    if (!is_cmd)
20038 		vim_free(rettv);
20039 	}
20040     }
20041 
20042     return idx < 0;
20043 }
20044 
20045 /*
20046  * Free the variable with a pending return value.
20047  */
20048     void
20049 discard_pending_return(rettv)
20050     void	*rettv;
20051 {
20052     free_tv((typval_T *)rettv);
20053 }
20054 
20055 /*
20056  * Generate a return command for producing the value of "rettv".  The result
20057  * is an allocated string.  Used by report_pending() for verbose messages.
20058  */
20059     char_u *
20060 get_return_cmd(rettv)
20061     void	*rettv;
20062 {
20063     char_u	*s = NULL;
20064     char_u	*tofree = NULL;
20065     char_u	numbuf[NUMBUFLEN];
20066 
20067     if (rettv != NULL)
20068 	s = echo_string((typval_T *)rettv, &tofree, numbuf, 0);
20069     if (s == NULL)
20070 	s = (char_u *)"";
20071 
20072     STRCPY(IObuff, ":return ");
20073     STRNCPY(IObuff + 8, s, IOSIZE - 8);
20074     if (STRLEN(s) + 8 >= IOSIZE)
20075 	STRCPY(IObuff + IOSIZE - 4, "...");
20076     vim_free(tofree);
20077     return vim_strsave(IObuff);
20078 }
20079 
20080 /*
20081  * Get next function line.
20082  * Called by do_cmdline() to get the next line.
20083  * Returns allocated string, or NULL for end of function.
20084  */
20085 /* ARGSUSED */
20086     char_u *
20087 get_func_line(c, cookie, indent)
20088     int	    c;		    /* not used */
20089     void    *cookie;
20090     int	    indent;	    /* not used */
20091 {
20092     funccall_T	*fcp = (funccall_T *)cookie;
20093     ufunc_T	*fp = fcp->func;
20094     char_u	*retval;
20095     garray_T	*gap;  /* growarray with function lines */
20096 
20097     /* If breakpoints have been added/deleted need to check for it. */
20098     if (fcp->dbg_tick != debug_tick)
20099     {
20100 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
20101 							       sourcing_lnum);
20102 	fcp->dbg_tick = debug_tick;
20103     }
20104 #ifdef FEAT_PROFILE
20105     if (do_profiling == PROF_YES)
20106 	func_line_end(cookie);
20107 #endif
20108 
20109     gap = &fp->uf_lines;
20110     if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
20111 	    || fcp->returned)
20112 	retval = NULL;
20113     else
20114     {
20115 	/* Skip NULL lines (continuation lines). */
20116 	while (fcp->linenr < gap->ga_len
20117 			  && ((char_u **)(gap->ga_data))[fcp->linenr] == NULL)
20118 	    ++fcp->linenr;
20119 	if (fcp->linenr >= gap->ga_len)
20120 	    retval = NULL;
20121 	else
20122 	{
20123 	    retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
20124 	    sourcing_lnum = fcp->linenr;
20125 #ifdef FEAT_PROFILE
20126 	    if (do_profiling == PROF_YES)
20127 		func_line_start(cookie);
20128 #endif
20129 	}
20130     }
20131 
20132     /* Did we encounter a breakpoint? */
20133     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
20134     {
20135 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
20136 	/* Find next breakpoint. */
20137 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
20138 							       sourcing_lnum);
20139 	fcp->dbg_tick = debug_tick;
20140     }
20141 
20142     return retval;
20143 }
20144 
20145 #if defined(FEAT_PROFILE) || defined(PROTO)
20146 /*
20147  * Called when starting to read a function line.
20148  * "sourcing_lnum" must be correct!
20149  * When skipping lines it may not actually be executed, but we won't find out
20150  * until later and we need to store the time now.
20151  */
20152     void
20153 func_line_start(cookie)
20154     void    *cookie;
20155 {
20156     funccall_T	*fcp = (funccall_T *)cookie;
20157     ufunc_T	*fp = fcp->func;
20158 
20159     if (fp->uf_profiling && sourcing_lnum >= 1
20160 				      && sourcing_lnum <= fp->uf_lines.ga_len)
20161     {
20162 	fp->uf_tml_idx = sourcing_lnum - 1;
20163 	/* Skip continuation lines. */
20164 	while (fp->uf_tml_idx > 0 && FUNCLINE(fp, fp->uf_tml_idx) == NULL)
20165 	    --fp->uf_tml_idx;
20166 	fp->uf_tml_execed = FALSE;
20167 	profile_start(&fp->uf_tml_start);
20168 	profile_zero(&fp->uf_tml_children);
20169 	profile_get_wait(&fp->uf_tml_wait);
20170     }
20171 }
20172 
20173 /*
20174  * Called when actually executing a function line.
20175  */
20176     void
20177 func_line_exec(cookie)
20178     void    *cookie;
20179 {
20180     funccall_T	*fcp = (funccall_T *)cookie;
20181     ufunc_T	*fp = fcp->func;
20182 
20183     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
20184 	fp->uf_tml_execed = TRUE;
20185 }
20186 
20187 /*
20188  * Called when done with a function line.
20189  */
20190     void
20191 func_line_end(cookie)
20192     void    *cookie;
20193 {
20194     funccall_T	*fcp = (funccall_T *)cookie;
20195     ufunc_T	*fp = fcp->func;
20196 
20197     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
20198     {
20199 	if (fp->uf_tml_execed)
20200 	{
20201 	    ++fp->uf_tml_count[fp->uf_tml_idx];
20202 	    profile_end(&fp->uf_tml_start);
20203 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
20204 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
20205 	    profile_self(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start,
20206 							&fp->uf_tml_children);
20207 	}
20208 	fp->uf_tml_idx = -1;
20209     }
20210 }
20211 #endif
20212 
20213 /*
20214  * Return TRUE if the currently active function should be ended, because a
20215  * return was encountered or an error occured.  Used inside a ":while".
20216  */
20217     int
20218 func_has_ended(cookie)
20219     void    *cookie;
20220 {
20221     funccall_T  *fcp = (funccall_T *)cookie;
20222 
20223     /* Ignore the "abort" flag if the abortion behavior has been changed due to
20224      * an error inside a try conditional. */
20225     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
20226 	    || fcp->returned);
20227 }
20228 
20229 /*
20230  * return TRUE if cookie indicates a function which "abort"s on errors.
20231  */
20232     int
20233 func_has_abort(cookie)
20234     void    *cookie;
20235 {
20236     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
20237 }
20238 
20239 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
20240 typedef enum
20241 {
20242     VAR_FLAVOUR_DEFAULT,
20243     VAR_FLAVOUR_SESSION,
20244     VAR_FLAVOUR_VIMINFO
20245 } var_flavour_T;
20246 
20247 static var_flavour_T var_flavour __ARGS((char_u *varname));
20248 
20249     static var_flavour_T
20250 var_flavour(varname)
20251     char_u *varname;
20252 {
20253     char_u *p = varname;
20254 
20255     if (ASCII_ISUPPER(*p))
20256     {
20257 	while (*(++p))
20258 	    if (ASCII_ISLOWER(*p))
20259 		return VAR_FLAVOUR_SESSION;
20260 	return VAR_FLAVOUR_VIMINFO;
20261     }
20262     else
20263 	return VAR_FLAVOUR_DEFAULT;
20264 }
20265 #endif
20266 
20267 #if defined(FEAT_VIMINFO) || defined(PROTO)
20268 /*
20269  * Restore global vars that start with a capital from the viminfo file
20270  */
20271     int
20272 read_viminfo_varlist(virp, writing)
20273     vir_T	*virp;
20274     int		writing;
20275 {
20276     char_u	*tab;
20277     int		is_string = FALSE;
20278     typval_T	tv;
20279 
20280     if (!writing && (find_viminfo_parameter('!') != NULL))
20281     {
20282 	tab = vim_strchr(virp->vir_line + 1, '\t');
20283 	if (tab != NULL)
20284 	{
20285 	    *tab++ = '\0';	/* isolate the variable name */
20286 	    if (*tab == 'S')	/* string var */
20287 		is_string = TRUE;
20288 
20289 	    tab = vim_strchr(tab, '\t');
20290 	    if (tab != NULL)
20291 	    {
20292 		if (is_string)
20293 		{
20294 		    tv.v_type = VAR_STRING;
20295 		    tv.vval.v_string = viminfo_readstring(virp,
20296 				       (int)(tab - virp->vir_line + 1), TRUE);
20297 		}
20298 		else
20299 		{
20300 		    tv.v_type = VAR_NUMBER;
20301 		    tv.vval.v_number = atol((char *)tab + 1);
20302 		}
20303 		set_var(virp->vir_line + 1, &tv, FALSE);
20304 		if (is_string)
20305 		    vim_free(tv.vval.v_string);
20306 	    }
20307 	}
20308     }
20309 
20310     return viminfo_readline(virp);
20311 }
20312 
20313 /*
20314  * Write global vars that start with a capital to the viminfo file
20315  */
20316     void
20317 write_viminfo_varlist(fp)
20318     FILE    *fp;
20319 {
20320     hashitem_T	*hi;
20321     dictitem_T	*this_var;
20322     int		todo;
20323     char	*s;
20324     char_u	*p;
20325     char_u	*tofree;
20326     char_u	numbuf[NUMBUFLEN];
20327 
20328     if (find_viminfo_parameter('!') == NULL)
20329 	return;
20330 
20331     fprintf(fp, _("\n# global variables:\n"));
20332 
20333     todo = (int)globvarht.ht_used;
20334     for (hi = globvarht.ht_array; todo > 0; ++hi)
20335     {
20336 	if (!HASHITEM_EMPTY(hi))
20337 	{
20338 	    --todo;
20339 	    this_var = HI2DI(hi);
20340 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
20341 	    {
20342 		switch (this_var->di_tv.v_type)
20343 		{
20344 		    case VAR_STRING: s = "STR"; break;
20345 		    case VAR_NUMBER: s = "NUM"; break;
20346 		    default: continue;
20347 		}
20348 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
20349 		p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
20350 		if (p != NULL)
20351 		    viminfo_writestring(fp, p);
20352 		vim_free(tofree);
20353 	    }
20354 	}
20355     }
20356 }
20357 #endif
20358 
20359 #if defined(FEAT_SESSION) || defined(PROTO)
20360     int
20361 store_session_globals(fd)
20362     FILE	*fd;
20363 {
20364     hashitem_T	*hi;
20365     dictitem_T	*this_var;
20366     int		todo;
20367     char_u	*p, *t;
20368 
20369     todo = (int)globvarht.ht_used;
20370     for (hi = globvarht.ht_array; todo > 0; ++hi)
20371     {
20372 	if (!HASHITEM_EMPTY(hi))
20373 	{
20374 	    --todo;
20375 	    this_var = HI2DI(hi);
20376 	    if ((this_var->di_tv.v_type == VAR_NUMBER
20377 			|| this_var->di_tv.v_type == VAR_STRING)
20378 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
20379 	    {
20380 		/* Escape special characters with a backslash.  Turn a LF and
20381 		 * CR into \n and \r. */
20382 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
20383 							(char_u *)"\\\"\n\r");
20384 		if (p == NULL)	    /* out of memory */
20385 		    break;
20386 		for (t = p; *t != NUL; ++t)
20387 		    if (*t == '\n')
20388 			*t = 'n';
20389 		    else if (*t == '\r')
20390 			*t = 'r';
20391 		if ((fprintf(fd, "let %s = %c%s%c",
20392 				this_var->di_key,
20393 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
20394 									: ' ',
20395 				p,
20396 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
20397 								   : ' ') < 0)
20398 			|| put_eol(fd) == FAIL)
20399 		{
20400 		    vim_free(p);
20401 		    return FAIL;
20402 		}
20403 		vim_free(p);
20404 	    }
20405 	}
20406     }
20407     return OK;
20408 }
20409 #endif
20410 
20411 /*
20412  * Display script name where an item was last set.
20413  * Should only be invoked when 'verbose' is non-zero.
20414  */
20415     void
20416 last_set_msg(scriptID)
20417     scid_T scriptID;
20418 {
20419     char_u *p;
20420 
20421     if (scriptID != 0)
20422     {
20423 	p = home_replace_save(NULL, get_scriptname(scriptID));
20424 	if (p != NULL)
20425 	{
20426 	    verbose_enter();
20427 	    MSG_PUTS(_("\n\tLast set from "));
20428 	    MSG_PUTS(p);
20429 	    vim_free(p);
20430 	    verbose_leave();
20431 	}
20432     }
20433 }
20434 
20435 #endif /* FEAT_EVAL */
20436 
20437 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
20438 
20439 
20440 #ifdef WIN3264
20441 /*
20442  * Functions for ":8" filename modifier: get 8.3 version of a filename.
20443  */
20444 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
20445 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
20446 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
20447 
20448 /*
20449  * Get the short pathname of a file.
20450  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
20451  */
20452     static int
20453 get_short_pathname(fnamep, bufp, fnamelen)
20454     char_u	**fnamep;
20455     char_u	**bufp;
20456     int		*fnamelen;
20457 {
20458     int		l,len;
20459     char_u	*newbuf;
20460 
20461     len = *fnamelen;
20462 
20463     l = GetShortPathName(*fnamep, *fnamep, len);
20464     if (l > len - 1)
20465     {
20466 	/* If that doesn't work (not enough space), then save the string
20467 	 * and try again with a new buffer big enough
20468 	 */
20469 	newbuf = vim_strnsave(*fnamep, l);
20470 	if (newbuf == NULL)
20471 	    return 0;
20472 
20473 	vim_free(*bufp);
20474 	*fnamep = *bufp = newbuf;
20475 
20476 	l = GetShortPathName(*fnamep,*fnamep,l+1);
20477 
20478 	/* Really should always succeed, as the buffer is big enough */
20479     }
20480 
20481     *fnamelen = l;
20482     return 1;
20483 }
20484 
20485 /*
20486  * Create a short path name.  Returns the length of the buffer it needs.
20487  * Doesn't copy over the end of the buffer passed in.
20488  */
20489     static int
20490 shortpath_for_invalid_fname(fname, bufp, fnamelen)
20491     char_u	**fname;
20492     char_u	**bufp;
20493     int		*fnamelen;
20494 {
20495     char_u	*s, *p, *pbuf2, *pbuf3;
20496     char_u	ch;
20497     int		len, len2, plen, slen;
20498 
20499     /* Make a copy */
20500     len2 = *fnamelen;
20501     pbuf2 = vim_strnsave(*fname, len2);
20502     pbuf3 = NULL;
20503 
20504     s = pbuf2 + len2 - 1; /* Find the end */
20505     slen = 1;
20506     plen = len2;
20507 
20508     if (after_pathsep(pbuf2, s + 1))
20509     {
20510 	--s;
20511 	++slen;
20512 	--plen;
20513     }
20514 
20515     do
20516     {
20517 	/* Go back one path-seperator */
20518 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
20519 	{
20520 	    --s;
20521 	    ++slen;
20522 	    --plen;
20523 	}
20524 	if (s <= pbuf2)
20525 	    break;
20526 
20527 	/* Remeber the character that is about to be blatted */
20528 	ch = *s;
20529 	*s = 0; /* get_short_pathname requires a null-terminated string */
20530 
20531 	/* Try it in situ */
20532 	p = pbuf2;
20533 	if (!get_short_pathname(&p, &pbuf3, &plen))
20534 	{
20535 	    vim_free(pbuf2);
20536 	    return -1;
20537 	}
20538 	*s = ch;    /* Preserve the string */
20539     } while (plen == 0);
20540 
20541     if (plen > 0)
20542     {
20543 	/* Remeber the length of the new string.  */
20544 	*fnamelen = len = plen + slen;
20545 	vim_free(*bufp);
20546 	if (len > len2)
20547 	{
20548 	    /* If there's not enough space in the currently allocated string,
20549 	     * then copy it to a buffer big enough.
20550 	     */
20551 	    *fname= *bufp = vim_strnsave(p, len);
20552 	    if (*fname == NULL)
20553 		return -1;
20554 	}
20555 	else
20556 	{
20557 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
20558 	    *fname = *bufp = pbuf2;
20559 	    if (p != pbuf2)
20560 		strncpy(*fname, p, plen);
20561 	    pbuf2 = NULL;
20562 	}
20563 	/* Concat the next bit */
20564 	strncpy(*fname + plen, s, slen);
20565 	(*fname)[len] = '\0';
20566     }
20567     vim_free(pbuf3);
20568     vim_free(pbuf2);
20569     return 0;
20570 }
20571 
20572 /*
20573  * Get a pathname for a partial path.
20574  */
20575     static int
20576 shortpath_for_partial(fnamep, bufp, fnamelen)
20577     char_u	**fnamep;
20578     char_u	**bufp;
20579     int		*fnamelen;
20580 {
20581     int		sepcount, len, tflen;
20582     char_u	*p;
20583     char_u	*pbuf, *tfname;
20584     int		hasTilde;
20585 
20586     /* Count up the path seperators from the RHS.. so we know which part
20587      * of the path to return.
20588      */
20589     sepcount = 0;
20590     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
20591 	if (vim_ispathsep(*p))
20592 	    ++sepcount;
20593 
20594     /* Need full path first (use expand_env() to remove a "~/") */
20595     hasTilde = (**fnamep == '~');
20596     if (hasTilde)
20597 	pbuf = tfname = expand_env_save(*fnamep);
20598     else
20599 	pbuf = tfname = FullName_save(*fnamep, FALSE);
20600 
20601     len = tflen = (int)STRLEN(tfname);
20602 
20603     if (!get_short_pathname(&tfname, &pbuf, &len))
20604 	return -1;
20605 
20606     if (len == 0)
20607     {
20608 	/* Don't have a valid filename, so shorten the rest of the
20609 	 * path if we can. This CAN give us invalid 8.3 filenames, but
20610 	 * there's not a lot of point in guessing what it might be.
20611 	 */
20612 	len = tflen;
20613 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
20614 	    return -1;
20615     }
20616 
20617     /* Count the paths backward to find the beginning of the desired string. */
20618     for (p = tfname + len - 1; p >= tfname; --p)
20619     {
20620 #ifdef FEAT_MBYTE
20621 	if (has_mbyte)
20622 	    p -= mb_head_off(tfname, p);
20623 #endif
20624 	if (vim_ispathsep(*p))
20625 	{
20626 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
20627 		break;
20628 	    else
20629 		sepcount --;
20630 	}
20631     }
20632     if (hasTilde)
20633     {
20634 	--p;
20635 	if (p >= tfname)
20636 	    *p = '~';
20637 	else
20638 	    return -1;
20639     }
20640     else
20641 	++p;
20642 
20643     /* Copy in the string - p indexes into tfname - allocated at pbuf */
20644     vim_free(*bufp);
20645     *fnamelen = (int)STRLEN(p);
20646     *bufp = pbuf;
20647     *fnamep = p;
20648 
20649     return 0;
20650 }
20651 #endif /* WIN3264 */
20652 
20653 /*
20654  * Adjust a filename, according to a string of modifiers.
20655  * *fnamep must be NUL terminated when called.  When returning, the length is
20656  * determined by *fnamelen.
20657  * Returns valid flags.
20658  * When there is an error, *fnamep is set to NULL.
20659  */
20660     int
20661 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
20662     char_u	*src;		/* string with modifiers */
20663     int		*usedlen;	/* characters after src that are used */
20664     char_u	**fnamep;	/* file name so far */
20665     char_u	**bufp;		/* buffer for allocated file name or NULL */
20666     int		*fnamelen;	/* length of fnamep */
20667 {
20668     int		valid = 0;
20669     char_u	*tail;
20670     char_u	*s, *p, *pbuf;
20671     char_u	dirname[MAXPATHL];
20672     int		c;
20673     int		has_fullname = 0;
20674 #ifdef WIN3264
20675     int		has_shortname = 0;
20676 #endif
20677 
20678 repeat:
20679     /* ":p" - full path/file_name */
20680     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
20681     {
20682 	has_fullname = 1;
20683 
20684 	valid |= VALID_PATH;
20685 	*usedlen += 2;
20686 
20687 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
20688 	if ((*fnamep)[0] == '~'
20689 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
20690 		&& ((*fnamep)[1] == '/'
20691 # ifdef BACKSLASH_IN_FILENAME
20692 		    || (*fnamep)[1] == '\\'
20693 # endif
20694 		    || (*fnamep)[1] == NUL)
20695 
20696 #endif
20697 	   )
20698 	{
20699 	    *fnamep = expand_env_save(*fnamep);
20700 	    vim_free(*bufp);	/* free any allocated file name */
20701 	    *bufp = *fnamep;
20702 	    if (*fnamep == NULL)
20703 		return -1;
20704 	}
20705 
20706 	/* When "/." or "/.." is used: force expansion to get rid of it. */
20707 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
20708 	{
20709 	    if (vim_ispathsep(*p)
20710 		    && p[1] == '.'
20711 		    && (p[2] == NUL
20712 			|| vim_ispathsep(p[2])
20713 			|| (p[2] == '.'
20714 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
20715 		break;
20716 	}
20717 
20718 	/* FullName_save() is slow, don't use it when not needed. */
20719 	if (*p != NUL || !vim_isAbsName(*fnamep))
20720 	{
20721 	    *fnamep = FullName_save(*fnamep, *p != NUL);
20722 	    vim_free(*bufp);	/* free any allocated file name */
20723 	    *bufp = *fnamep;
20724 	    if (*fnamep == NULL)
20725 		return -1;
20726 	}
20727 
20728 	/* Append a path separator to a directory. */
20729 	if (mch_isdir(*fnamep))
20730 	{
20731 	    /* Make room for one or two extra characters. */
20732 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
20733 	    vim_free(*bufp);	/* free any allocated file name */
20734 	    *bufp = *fnamep;
20735 	    if (*fnamep == NULL)
20736 		return -1;
20737 	    add_pathsep(*fnamep);
20738 	}
20739     }
20740 
20741     /* ":." - path relative to the current directory */
20742     /* ":~" - path relative to the home directory */
20743     /* ":8" - shortname path - postponed till after */
20744     while (src[*usedlen] == ':'
20745 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
20746     {
20747 	*usedlen += 2;
20748 	if (c == '8')
20749 	{
20750 #ifdef WIN3264
20751 	    has_shortname = 1; /* Postpone this. */
20752 #endif
20753 	    continue;
20754 	}
20755 	pbuf = NULL;
20756 	/* Need full path first (use expand_env() to remove a "~/") */
20757 	if (!has_fullname)
20758 	{
20759 	    if (c == '.' && **fnamep == '~')
20760 		p = pbuf = expand_env_save(*fnamep);
20761 	    else
20762 		p = pbuf = FullName_save(*fnamep, FALSE);
20763 	}
20764 	else
20765 	    p = *fnamep;
20766 
20767 	has_fullname = 0;
20768 
20769 	if (p != NULL)
20770 	{
20771 	    if (c == '.')
20772 	    {
20773 		mch_dirname(dirname, MAXPATHL);
20774 		s = shorten_fname(p, dirname);
20775 		if (s != NULL)
20776 		{
20777 		    *fnamep = s;
20778 		    if (pbuf != NULL)
20779 		    {
20780 			vim_free(*bufp);   /* free any allocated file name */
20781 			*bufp = pbuf;
20782 			pbuf = NULL;
20783 		    }
20784 		}
20785 	    }
20786 	    else
20787 	    {
20788 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
20789 		/* Only replace it when it starts with '~' */
20790 		if (*dirname == '~')
20791 		{
20792 		    s = vim_strsave(dirname);
20793 		    if (s != NULL)
20794 		    {
20795 			*fnamep = s;
20796 			vim_free(*bufp);
20797 			*bufp = s;
20798 		    }
20799 		}
20800 	    }
20801 	    vim_free(pbuf);
20802 	}
20803     }
20804 
20805     tail = gettail(*fnamep);
20806     *fnamelen = (int)STRLEN(*fnamep);
20807 
20808     /* ":h" - head, remove "/file_name", can be repeated  */
20809     /* Don't remove the first "/" or "c:\" */
20810     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
20811     {
20812 	valid |= VALID_HEAD;
20813 	*usedlen += 2;
20814 	s = get_past_head(*fnamep);
20815 	while (tail > s && after_pathsep(s, tail))
20816 	    --tail;
20817 	*fnamelen = (int)(tail - *fnamep);
20818 #ifdef VMS
20819 	if (*fnamelen > 0)
20820 	    *fnamelen += 1; /* the path separator is part of the path */
20821 #endif
20822 	while (tail > s && !after_pathsep(s, tail))
20823 	    mb_ptr_back(*fnamep, tail);
20824     }
20825 
20826     /* ":8" - shortname  */
20827     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
20828     {
20829 	*usedlen += 2;
20830 #ifdef WIN3264
20831 	has_shortname = 1;
20832 #endif
20833     }
20834 
20835 #ifdef WIN3264
20836     /* Check shortname after we have done 'heads' and before we do 'tails'
20837      */
20838     if (has_shortname)
20839     {
20840 	pbuf = NULL;
20841 	/* Copy the string if it is shortened by :h */
20842 	if (*fnamelen < (int)STRLEN(*fnamep))
20843 	{
20844 	    p = vim_strnsave(*fnamep, *fnamelen);
20845 	    if (p == 0)
20846 		return -1;
20847 	    vim_free(*bufp);
20848 	    *bufp = *fnamep = p;
20849 	}
20850 
20851 	/* Split into two implementations - makes it easier.  First is where
20852 	 * there isn't a full name already, second is where there is.
20853 	 */
20854 	if (!has_fullname && !vim_isAbsName(*fnamep))
20855 	{
20856 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
20857 		return -1;
20858 	}
20859 	else
20860 	{
20861 	    int		l;
20862 
20863 	    /* Simple case, already have the full-name
20864 	     * Nearly always shorter, so try first time. */
20865 	    l = *fnamelen;
20866 	    if (!get_short_pathname(fnamep, bufp, &l))
20867 		return -1;
20868 
20869 	    if (l == 0)
20870 	    {
20871 		/* Couldn't find the filename.. search the paths.
20872 		 */
20873 		l = *fnamelen;
20874 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
20875 		    return -1;
20876 	    }
20877 	    *fnamelen = l;
20878 	}
20879     }
20880 #endif /* WIN3264 */
20881 
20882     /* ":t" - tail, just the basename */
20883     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
20884     {
20885 	*usedlen += 2;
20886 	*fnamelen -= (int)(tail - *fnamep);
20887 	*fnamep = tail;
20888     }
20889 
20890     /* ":e" - extension, can be repeated */
20891     /* ":r" - root, without extension, can be repeated */
20892     while (src[*usedlen] == ':'
20893 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
20894     {
20895 	/* find a '.' in the tail:
20896 	 * - for second :e: before the current fname
20897 	 * - otherwise: The last '.'
20898 	 */
20899 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
20900 	    s = *fnamep - 2;
20901 	else
20902 	    s = *fnamep + *fnamelen - 1;
20903 	for ( ; s > tail; --s)
20904 	    if (s[0] == '.')
20905 		break;
20906 	if (src[*usedlen + 1] == 'e')		/* :e */
20907 	{
20908 	    if (s > tail)
20909 	    {
20910 		*fnamelen += (int)(*fnamep - (s + 1));
20911 		*fnamep = s + 1;
20912 #ifdef VMS
20913 		/* cut version from the extension */
20914 		s = *fnamep + *fnamelen - 1;
20915 		for ( ; s > *fnamep; --s)
20916 		    if (s[0] == ';')
20917 			break;
20918 		if (s > *fnamep)
20919 		    *fnamelen = s - *fnamep;
20920 #endif
20921 	    }
20922 	    else if (*fnamep <= tail)
20923 		*fnamelen = 0;
20924 	}
20925 	else				/* :r */
20926 	{
20927 	    if (s > tail)	/* remove one extension */
20928 		*fnamelen = (int)(s - *fnamep);
20929 	}
20930 	*usedlen += 2;
20931     }
20932 
20933     /* ":s?pat?foo?" - substitute */
20934     /* ":gs?pat?foo?" - global substitute */
20935     if (src[*usedlen] == ':'
20936 	    && (src[*usedlen + 1] == 's'
20937 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
20938     {
20939 	char_u	    *str;
20940 	char_u	    *pat;
20941 	char_u	    *sub;
20942 	int	    sep;
20943 	char_u	    *flags;
20944 	int	    didit = FALSE;
20945 
20946 	flags = (char_u *)"";
20947 	s = src + *usedlen + 2;
20948 	if (src[*usedlen + 1] == 'g')
20949 	{
20950 	    flags = (char_u *)"g";
20951 	    ++s;
20952 	}
20953 
20954 	sep = *s++;
20955 	if (sep)
20956 	{
20957 	    /* find end of pattern */
20958 	    p = vim_strchr(s, sep);
20959 	    if (p != NULL)
20960 	    {
20961 		pat = vim_strnsave(s, (int)(p - s));
20962 		if (pat != NULL)
20963 		{
20964 		    s = p + 1;
20965 		    /* find end of substitution */
20966 		    p = vim_strchr(s, sep);
20967 		    if (p != NULL)
20968 		    {
20969 			sub = vim_strnsave(s, (int)(p - s));
20970 			str = vim_strnsave(*fnamep, *fnamelen);
20971 			if (sub != NULL && str != NULL)
20972 			{
20973 			    *usedlen = (int)(p + 1 - src);
20974 			    s = do_string_sub(str, pat, sub, flags);
20975 			    if (s != NULL)
20976 			    {
20977 				*fnamep = s;
20978 				*fnamelen = (int)STRLEN(s);
20979 				vim_free(*bufp);
20980 				*bufp = s;
20981 				didit = TRUE;
20982 			    }
20983 			}
20984 			vim_free(sub);
20985 			vim_free(str);
20986 		    }
20987 		    vim_free(pat);
20988 		}
20989 	    }
20990 	    /* after using ":s", repeat all the modifiers */
20991 	    if (didit)
20992 		goto repeat;
20993 	}
20994     }
20995 
20996     return valid;
20997 }
20998 
20999 /*
21000  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
21001  * "flags" can be "g" to do a global substitute.
21002  * Returns an allocated string, NULL for error.
21003  */
21004     char_u *
21005 do_string_sub(str, pat, sub, flags)
21006     char_u	*str;
21007     char_u	*pat;
21008     char_u	*sub;
21009     char_u	*flags;
21010 {
21011     int		sublen;
21012     regmatch_T	regmatch;
21013     int		i;
21014     int		do_all;
21015     char_u	*tail;
21016     garray_T	ga;
21017     char_u	*ret;
21018     char_u	*save_cpo;
21019 
21020     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
21021     save_cpo = p_cpo;
21022     p_cpo = (char_u *)"";
21023 
21024     ga_init2(&ga, 1, 200);
21025 
21026     do_all = (flags[0] == 'g');
21027 
21028     regmatch.rm_ic = p_ic;
21029     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
21030     if (regmatch.regprog != NULL)
21031     {
21032 	tail = str;
21033 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
21034 	{
21035 	    /*
21036 	     * Get some space for a temporary buffer to do the substitution
21037 	     * into.  It will contain:
21038 	     * - The text up to where the match is.
21039 	     * - The substituted text.
21040 	     * - The text after the match.
21041 	     */
21042 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
21043 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
21044 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
21045 	    {
21046 		ga_clear(&ga);
21047 		break;
21048 	    }
21049 
21050 	    /* copy the text up to where the match is */
21051 	    i = (int)(regmatch.startp[0] - tail);
21052 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
21053 	    /* add the substituted text */
21054 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
21055 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
21056 	    ga.ga_len += i + sublen - 1;
21057 	    /* avoid getting stuck on a match with an empty string */
21058 	    if (tail == regmatch.endp[0])
21059 	    {
21060 		if (*tail == NUL)
21061 		    break;
21062 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
21063 		++ga.ga_len;
21064 	    }
21065 	    else
21066 	    {
21067 		tail = regmatch.endp[0];
21068 		if (*tail == NUL)
21069 		    break;
21070 	    }
21071 	    if (!do_all)
21072 		break;
21073 	}
21074 
21075 	if (ga.ga_data != NULL)
21076 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
21077 
21078 	vim_free(regmatch.regprog);
21079     }
21080 
21081     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
21082     ga_clear(&ga);
21083     p_cpo = save_cpo;
21084 
21085     return ret;
21086 }
21087 
21088 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
21089