xref: /vim-8.2.3635/src/eval.c (revision 899dddf8) 
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 };
345 
346 /* shorthand */
347 #define vv_type	vv_di.di_tv.v_type
348 #define vv_nr	vv_di.di_tv.vval.v_number
349 #define vv_str	vv_di.di_tv.vval.v_string
350 #define vv_tv	vv_di.di_tv
351 
352 /*
353  * The v: variables are stored in dictionary "vimvardict".
354  * "vimvars_var" is the variable that is used for the "l:" scope.
355  */
356 static dict_T		vimvardict;
357 static dictitem_T	vimvars_var;
358 #define vimvarht  vimvardict.dv_hashtab
359 
360 static void prepare_vimvar __ARGS((int idx, typval_T *save_tv));
361 static void restore_vimvar __ARGS((int idx, typval_T *save_tv));
362 #if defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)
363 static int call_vim_function __ARGS((char_u *func, int argc, char_u **argv, int safe, typval_T *rettv));
364 #endif
365 static int ex_let_vars __ARGS((char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars));
366 static char_u *skip_var_list __ARGS((char_u *arg, int *var_count, int *semicolon));
367 static char_u *skip_var_one __ARGS((char_u *arg));
368 static void list_hashtable_vars __ARGS((hashtab_T *ht, char_u *prefix, int empty));
369 static void list_glob_vars __ARGS((void));
370 static void list_buf_vars __ARGS((void));
371 static void list_win_vars __ARGS((void));
372 static void list_vim_vars __ARGS((void));
373 static void list_script_vars __ARGS((void));
374 static void list_func_vars __ARGS((void));
375 static char_u *list_arg_vars __ARGS((exarg_T *eap, char_u *arg));
376 static char_u *ex_let_one __ARGS((char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op));
377 static int check_changedtick __ARGS((char_u *arg));
378 static char_u *get_lval __ARGS((char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int quiet, int fne_flags));
379 static void clear_lval __ARGS((lval_T *lp));
380 static void set_var_lval __ARGS((lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op));
381 static int tv_op __ARGS((typval_T *tv1, typval_T *tv2, char_u  *op));
382 static void list_add_watch __ARGS((list_T *l, listwatch_T *lw));
383 static void list_rem_watch __ARGS((list_T *l, listwatch_T *lwrem));
384 static void list_fix_watch __ARGS((list_T *l, listitem_T *item));
385 static void ex_unletlock __ARGS((exarg_T *eap, char_u *argstart, int deep));
386 static int do_unlet_var __ARGS((lval_T *lp, char_u *name_end, int forceit));
387 static int do_lock_var __ARGS((lval_T *lp, char_u *name_end, int deep, int lock));
388 static void item_lock __ARGS((typval_T *tv, int deep, int lock));
389 static int tv_islocked __ARGS((typval_T *tv));
390 
391 static int eval0 __ARGS((char_u *arg,  typval_T *rettv, char_u **nextcmd, int evaluate));
392 static int eval1 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
393 static int eval2 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
394 static int eval3 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
395 static int eval4 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
396 static int eval5 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
397 static int eval6 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
398 static int eval7 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
399 
400 static int eval_index __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
401 static int get_option_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
402 static int get_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
403 static int get_lit_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
404 static int get_list_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
405 static int rettv_list_alloc __ARGS((typval_T *rettv));
406 static listitem_T *listitem_alloc __ARGS((void));
407 static void listitem_free __ARGS((listitem_T *item));
408 static void listitem_remove __ARGS((list_T *l, listitem_T *item));
409 static long list_len __ARGS((list_T *l));
410 static int list_equal __ARGS((list_T *l1, list_T *l2, int ic));
411 static int dict_equal __ARGS((dict_T *d1, dict_T *d2, int ic));
412 static int tv_equal __ARGS((typval_T *tv1, typval_T *tv2, int ic));
413 static listitem_T *list_find __ARGS((list_T *l, long n));
414 static long list_find_nr __ARGS((list_T *l, long idx, int *errorp));
415 static long list_idx_of_item __ARGS((list_T *l, listitem_T *item));
416 static void list_append __ARGS((list_T *l, listitem_T *item));
417 static int list_append_tv __ARGS((list_T *l, typval_T *tv));
418 static int list_append_string __ARGS((list_T *l, char_u *str, int len));
419 static int list_append_number __ARGS((list_T *l, varnumber_T n));
420 static int list_insert_tv __ARGS((list_T *l, typval_T *tv, listitem_T *item));
421 static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
422 static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
423 static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
424 static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
425 static char_u *list2string __ARGS((typval_T *tv, int copyID));
426 static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo, int copyID));
427 static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
428 static void set_ref_in_list __ARGS((list_T *l, int copyID));
429 static void set_ref_in_item __ARGS((typval_T *tv, int copyID));
430 static void dict_unref __ARGS((dict_T *d));
431 static void dict_free __ARGS((dict_T *d));
432 static dictitem_T *dictitem_alloc __ARGS((char_u *key));
433 static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
434 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
435 static void dictitem_free __ARGS((dictitem_T *item));
436 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
437 static int dict_add __ARGS((dict_T *d, dictitem_T *item));
438 static long dict_len __ARGS((dict_T *d));
439 static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
440 static char_u *dict2string __ARGS((typval_T *tv, int copyID));
441 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
442 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
443 static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
444 static char_u *string_quote __ARGS((char_u *str, int function));
445 static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
446 static int find_internal_func __ARGS((char_u *name));
447 static char_u *deref_func_name __ARGS((char_u *name, int *lenp));
448 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));
449 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));
450 static void emsg_funcname __ARGS((char *msg, char_u *name));
451 
452 static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
453 static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
454 static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
455 static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
456 static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
457 static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
458 static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
459 static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
460 static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
461 static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
462 static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
463 static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
464 static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
465 static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
466 static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
467 static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
468 static void f_changenr __ARGS((typval_T *argvars, typval_T *rettv));
469 static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
470 static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
472 #if defined(FEAT_INS_EXPAND)
473 static void f_complete __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
476 #endif
477 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
478 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
480 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
481 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
482 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
486 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_getcmdtype __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_getpos __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_inputlist __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
558 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
559 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
560 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
561 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
562 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
563 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
564 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
565 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
575 #ifdef vim_mkdir
576 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
577 #endif
578 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_pumvisible __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_reltime __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_reltimestr __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
594 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
595 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
596 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_searchdecl __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_searchpairpos __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_searchpos __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_setloclist __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_setpos __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_str2nr __ARGS((typval_T *argvars, typval_T *rettv));
620 #ifdef HAVE_STRFTIME
621 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
622 #endif
623 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
629 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
630 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
631 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
632 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
633 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
634 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
635 static void f_tabpagebuflist __ARGS((typval_T *argvars, typval_T *rettv));
636 static void f_tabpagenr __ARGS((typval_T *argvars, typval_T *rettv));
637 static void f_tabpagewinnr __ARGS((typval_T *argvars, typval_T *rettv));
638 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
639 static void f_tagfiles __ARGS((typval_T *argvars, typval_T *rettv));
640 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
641 static void f_test __ARGS((typval_T *argvars, typval_T *rettv));
642 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
643 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
644 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
645 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
646 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
647 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
648 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
649 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
650 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
651 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
652 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
653 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
654 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
655 static void f_winrestview __ARGS((typval_T *argvars, typval_T *rettv));
656 static void f_winsaveview __ARGS((typval_T *argvars, typval_T *rettv));
657 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
658 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
659 
660 static int list2fpos __ARGS((typval_T *arg, pos_T *posp, int *fnump));
661 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum, int *fnum));
662 static int get_env_len __ARGS((char_u **arg));
663 static int get_id_len __ARGS((char_u **arg));
664 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
665 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
666 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
667 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
668 				   valid character */
669 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
670 static int eval_isnamec __ARGS((int c));
671 static int eval_isnamec1 __ARGS((int c));
672 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
673 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
674 static typval_T *alloc_tv __ARGS((void));
675 static typval_T *alloc_string_tv __ARGS((char_u *string));
676 static void init_tv __ARGS((typval_T *varp));
677 static long get_tv_number __ARGS((typval_T *varp));
678 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
679 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
680 static char_u *get_tv_string __ARGS((typval_T *varp));
681 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
682 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
683 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
684 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
685 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
686 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
687 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
688 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
689 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
690 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
691 static int var_check_ro __ARGS((int flags, char_u *name));
692 static int tv_check_lock __ARGS((int lock, char_u *name));
693 static void copy_tv __ARGS((typval_T *from, typval_T *to));
694 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
695 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
696 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
697 static int eval_fname_script __ARGS((char_u *p));
698 static int eval_fname_sid __ARGS((char_u *p));
699 static void list_func_head __ARGS((ufunc_T *fp, int indent));
700 static ufunc_T *find_func __ARGS((char_u *name));
701 static int function_exists __ARGS((char_u *name));
702 static int builtin_function __ARGS((char_u *name));
703 #ifdef FEAT_PROFILE
704 static void func_do_profile __ARGS((ufunc_T *fp));
705 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
706 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
707 static int
708 # ifdef __BORLANDC__
709     _RTLENTRYF
710 # endif
711 	prof_total_cmp __ARGS((const void *s1, const void *s2));
712 static int
713 # ifdef __BORLANDC__
714     _RTLENTRYF
715 # endif
716 	prof_self_cmp __ARGS((const void *s1, const void *s2));
717 #endif
718 static int script_autoload __ARGS((char_u *name, int reload));
719 static char_u *autoload_name __ARGS((char_u *name));
720 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
721 static void func_free __ARGS((ufunc_T *fp));
722 static void func_unref __ARGS((char_u *name));
723 static void func_ref __ARGS((char_u *name));
724 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));
725 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
726 static win_T *find_win_by_nr __ARGS((typval_T *vp));
727 static int searchpair_cmn __ARGS((typval_T *argvars, pos_T *match_pos));
728 static int search_cmn __ARGS((typval_T *argvars, pos_T *match_pos, int *flagsp));
729 
730 /* Character used as separated in autoload function/variable names. */
731 #define AUTOLOAD_CHAR '#'
732 
733 /*
734  * Initialize the global and v: variables.
735  */
736     void
737 eval_init()
738 {
739     int		    i;
740     struct vimvar   *p;
741 
742     init_var_dict(&globvardict, &globvars_var);
743     init_var_dict(&vimvardict, &vimvars_var);
744     hash_init(&compat_hashtab);
745     hash_init(&func_hashtab);
746 
747     for (i = 0; i < VV_LEN; ++i)
748     {
749 	p = &vimvars[i];
750 	STRCPY(p->vv_di.di_key, p->vv_name);
751 	if (p->vv_flags & VV_RO)
752 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
753 	else if (p->vv_flags & VV_RO_SBX)
754 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
755 	else
756 	    p->vv_di.di_flags = DI_FLAGS_FIX;
757 
758 	/* add to v: scope dict, unless the value is not always available */
759 	if (p->vv_type != VAR_UNKNOWN)
760 	    hash_add(&vimvarht, p->vv_di.di_key);
761 	if (p->vv_flags & VV_COMPAT)
762 	    /* add to compat scope dict */
763 	    hash_add(&compat_hashtab, p->vv_di.di_key);
764     }
765 }
766 
767 #if defined(EXITFREE) || defined(PROTO)
768     void
769 eval_clear()
770 {
771     int		    i;
772     struct vimvar   *p;
773 
774     for (i = 0; i < VV_LEN; ++i)
775     {
776 	p = &vimvars[i];
777 	if (p->vv_di.di_tv.v_type == VAR_STRING)
778 	{
779 	    vim_free(p->vv_di.di_tv.vval.v_string);
780 	    p->vv_di.di_tv.vval.v_string = NULL;
781 	}
782     }
783     hash_clear(&vimvarht);
784     hash_clear(&compat_hashtab);
785 
786     /* script-local variables */
787     for (i = 1; i <= ga_scripts.ga_len; ++i)
788 	vars_clear(&SCRIPT_VARS(i));
789     ga_clear(&ga_scripts);
790     free_scriptnames();
791 
792     /* global variables */
793     vars_clear(&globvarht);
794 
795     /* functions */
796     free_all_functions();
797     hash_clear(&func_hashtab);
798 
799     /* unreferenced lists and dicts */
800     (void)garbage_collect();
801 }
802 #endif
803 
804 /*
805  * Return the name of the executed function.
806  */
807     char_u *
808 func_name(cookie)
809     void *cookie;
810 {
811     return ((funccall_T *)cookie)->func->uf_name;
812 }
813 
814 /*
815  * Return the address holding the next breakpoint line for a funccall cookie.
816  */
817     linenr_T *
818 func_breakpoint(cookie)
819     void *cookie;
820 {
821     return &((funccall_T *)cookie)->breakpoint;
822 }
823 
824 /*
825  * Return the address holding the debug tick for a funccall cookie.
826  */
827     int *
828 func_dbg_tick(cookie)
829     void *cookie;
830 {
831     return &((funccall_T *)cookie)->dbg_tick;
832 }
833 
834 /*
835  * Return the nesting level for a funccall cookie.
836  */
837     int
838 func_level(cookie)
839     void *cookie;
840 {
841     return ((funccall_T *)cookie)->level;
842 }
843 
844 /* pointer to funccal for currently active function */
845 funccall_T *current_funccal = NULL;
846 
847 /*
848  * Return TRUE when a function was ended by a ":return" command.
849  */
850     int
851 current_func_returned()
852 {
853     return current_funccal->returned;
854 }
855 
856 
857 /*
858  * Set an internal variable to a string value. Creates the variable if it does
859  * not already exist.
860  */
861     void
862 set_internal_string_var(name, value)
863     char_u	*name;
864     char_u	*value;
865 {
866     char_u	*val;
867     typval_T	*tvp;
868 
869     val = vim_strsave(value);
870     if (val != NULL)
871     {
872 	tvp = alloc_string_tv(val);
873 	if (tvp != NULL)
874 	{
875 	    set_var(name, tvp, FALSE);
876 	    free_tv(tvp);
877 	}
878     }
879 }
880 
881 static lval_T	*redir_lval = NULL;
882 static char_u	*redir_endp = NULL;
883 static char_u	*redir_varname = NULL;
884 
885 /*
886  * Start recording command output to a variable
887  * Returns OK if successfully completed the setup.  FAIL otherwise.
888  */
889     int
890 var_redir_start(name, append)
891     char_u	*name;
892     int		append;		/* append to an existing variable */
893 {
894     int		save_emsg;
895     int		err;
896     typval_T	tv;
897 
898     /* Make sure a valid variable name is specified */
899     if (!eval_isnamec1(*name))
900     {
901 	EMSG(_(e_invarg));
902 	return FAIL;
903     }
904 
905     redir_varname = vim_strsave(name);
906     if (redir_varname == NULL)
907 	return FAIL;
908 
909     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
910     if (redir_lval == NULL)
911     {
912 	var_redir_stop();
913 	return FAIL;
914     }
915 
916     /* Parse the variable name (can be a dict or list entry). */
917     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
918 							     FNE_CHECK_START);
919     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
920     {
921 	if (redir_endp != NULL && *redir_endp != NUL)
922 	    /* Trailing characters are present after the variable name */
923 	    EMSG(_(e_trailing));
924 	else
925 	    EMSG(_(e_invarg));
926 	var_redir_stop();
927 	return FAIL;
928     }
929 
930     /* check if we can write to the variable: set it to or append an empty
931      * string */
932     save_emsg = did_emsg;
933     did_emsg = FALSE;
934     tv.v_type = VAR_STRING;
935     tv.vval.v_string = (char_u *)"";
936     if (append)
937 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
938     else
939 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
940     err = did_emsg;
941     did_emsg |= save_emsg;
942     if (err)
943     {
944 	var_redir_stop();
945 	return FAIL;
946     }
947     if (redir_lval->ll_newkey != NULL)
948     {
949 	/* Dictionary item was created, don't do it again. */
950 	vim_free(redir_lval->ll_newkey);
951 	redir_lval->ll_newkey = NULL;
952     }
953 
954     return OK;
955 }
956 
957 /*
958  * Append "value[len]" to the variable set by var_redir_start().
959  */
960     void
961 var_redir_str(value, len)
962     char_u	*value;
963     int		len;
964 {
965     char_u	*val;
966     typval_T	tv;
967     int		save_emsg;
968     int		err;
969 
970     if (redir_lval == NULL)
971 	return;
972 
973     if (len == -1)
974 	/* Append the entire string */
975 	val = vim_strsave(value);
976     else
977 	/* Append only the specified number of characters */
978 	val = vim_strnsave(value, len);
979     if (val == NULL)
980 	return;
981 
982     tv.v_type = VAR_STRING;
983     tv.vval.v_string = val;
984 
985     save_emsg = did_emsg;
986     did_emsg = FALSE;
987     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
988     err = did_emsg;
989     did_emsg |= save_emsg;
990     if (err)
991 	var_redir_stop();
992 
993     vim_free(tv.vval.v_string);
994 }
995 
996 /*
997  * Stop redirecting command output to a variable.
998  */
999     void
1000 var_redir_stop()
1001 {
1002     if (redir_lval != NULL)
1003     {
1004 	clear_lval(redir_lval);
1005 	vim_free(redir_lval);
1006 	redir_lval = NULL;
1007     }
1008     vim_free(redir_varname);
1009     redir_varname = NULL;
1010 }
1011 
1012 # if defined(FEAT_MBYTE) || defined(PROTO)
1013     int
1014 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
1015     char_u	*enc_from;
1016     char_u	*enc_to;
1017     char_u	*fname_from;
1018     char_u	*fname_to;
1019 {
1020     int		err = FALSE;
1021 
1022     set_vim_var_string(VV_CC_FROM, enc_from, -1);
1023     set_vim_var_string(VV_CC_TO, enc_to, -1);
1024     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
1025     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
1026     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
1027 	err = TRUE;
1028     set_vim_var_string(VV_CC_FROM, NULL, -1);
1029     set_vim_var_string(VV_CC_TO, NULL, -1);
1030     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1031     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1032 
1033     if (err)
1034 	return FAIL;
1035     return OK;
1036 }
1037 # endif
1038 
1039 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1040     int
1041 eval_printexpr(fname, args)
1042     char_u	*fname;
1043     char_u	*args;
1044 {
1045     int		err = FALSE;
1046 
1047     set_vim_var_string(VV_FNAME_IN, fname, -1);
1048     set_vim_var_string(VV_CMDARG, args, -1);
1049     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1050 	err = TRUE;
1051     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1052     set_vim_var_string(VV_CMDARG, NULL, -1);
1053 
1054     if (err)
1055     {
1056 	mch_remove(fname);
1057 	return FAIL;
1058     }
1059     return OK;
1060 }
1061 # endif
1062 
1063 # if defined(FEAT_DIFF) || defined(PROTO)
1064     void
1065 eval_diff(origfile, newfile, outfile)
1066     char_u	*origfile;
1067     char_u	*newfile;
1068     char_u	*outfile;
1069 {
1070     int		err = FALSE;
1071 
1072     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1073     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1074     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1075     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1076     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1077     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1078     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1079 }
1080 
1081     void
1082 eval_patch(origfile, difffile, outfile)
1083     char_u	*origfile;
1084     char_u	*difffile;
1085     char_u	*outfile;
1086 {
1087     int		err;
1088 
1089     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1090     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1091     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1092     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1093     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1094     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1095     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1096 }
1097 # endif
1098 
1099 /*
1100  * Top level evaluation function, returning a boolean.
1101  * Sets "error" to TRUE if there was an error.
1102  * Return TRUE or FALSE.
1103  */
1104     int
1105 eval_to_bool(arg, error, nextcmd, skip)
1106     char_u	*arg;
1107     int		*error;
1108     char_u	**nextcmd;
1109     int		skip;	    /* only parse, don't execute */
1110 {
1111     typval_T	tv;
1112     int		retval = FALSE;
1113 
1114     if (skip)
1115 	++emsg_skip;
1116     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1117 	*error = TRUE;
1118     else
1119     {
1120 	*error = FALSE;
1121 	if (!skip)
1122 	{
1123 	    retval = (get_tv_number_chk(&tv, error) != 0);
1124 	    clear_tv(&tv);
1125 	}
1126     }
1127     if (skip)
1128 	--emsg_skip;
1129 
1130     return retval;
1131 }
1132 
1133 /*
1134  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1135  * only parsing to "nextcmd" is done, without reporting errors.  Return
1136  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1137  */
1138     char_u *
1139 eval_to_string_skip(arg, nextcmd, skip)
1140     char_u	*arg;
1141     char_u	**nextcmd;
1142     int		skip;	    /* only parse, don't execute */
1143 {
1144     typval_T	tv;
1145     char_u	*retval;
1146 
1147     if (skip)
1148 	++emsg_skip;
1149     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1150 	retval = NULL;
1151     else
1152     {
1153 	retval = vim_strsave(get_tv_string(&tv));
1154 	clear_tv(&tv);
1155     }
1156     if (skip)
1157 	--emsg_skip;
1158 
1159     return retval;
1160 }
1161 
1162 /*
1163  * Skip over an expression at "*pp".
1164  * Return FAIL for an error, OK otherwise.
1165  */
1166     int
1167 skip_expr(pp)
1168     char_u	**pp;
1169 {
1170     typval_T	rettv;
1171 
1172     *pp = skipwhite(*pp);
1173     return eval1(pp, &rettv, FALSE);
1174 }
1175 
1176 /*
1177  * Top level evaluation function, returning a string.
1178  * Return pointer to allocated memory, or NULL for failure.
1179  */
1180     char_u *
1181 eval_to_string(arg, nextcmd, dolist)
1182     char_u	*arg;
1183     char_u	**nextcmd;
1184     int		dolist;		/* turn List into sequence of lines */
1185 {
1186     typval_T	tv;
1187     char_u	*retval;
1188     garray_T	ga;
1189 
1190     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1191 	retval = NULL;
1192     else
1193     {
1194 	if (dolist && tv.v_type == VAR_LIST)
1195 	{
1196 	    ga_init2(&ga, (int)sizeof(char), 80);
1197 	    list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, 0);
1198 	    ga_append(&ga, NUL);
1199 	    retval = (char_u *)ga.ga_data;
1200 	}
1201 	else
1202 	    retval = vim_strsave(get_tv_string(&tv));
1203 	clear_tv(&tv);
1204     }
1205 
1206     return retval;
1207 }
1208 
1209 /*
1210  * Call eval_to_string() without using current local variables and using
1211  * textlock.  When "use_sandbox" is TRUE use the sandbox.
1212  */
1213     char_u *
1214 eval_to_string_safe(arg, nextcmd, use_sandbox)
1215     char_u	*arg;
1216     char_u	**nextcmd;
1217     int		use_sandbox;
1218 {
1219     char_u	*retval;
1220     void	*save_funccalp;
1221 
1222     save_funccalp = save_funccal();
1223     if (use_sandbox)
1224 	++sandbox;
1225     ++textlock;
1226     retval = eval_to_string(arg, nextcmd, FALSE);
1227     if (use_sandbox)
1228 	--sandbox;
1229     --textlock;
1230     restore_funccal(save_funccalp);
1231     return retval;
1232 }
1233 
1234 /*
1235  * Top level evaluation function, returning a number.
1236  * Evaluates "expr" silently.
1237  * Returns -1 for an error.
1238  */
1239     int
1240 eval_to_number(expr)
1241     char_u	*expr;
1242 {
1243     typval_T	rettv;
1244     int		retval;
1245     char_u	*p = skipwhite(expr);
1246 
1247     ++emsg_off;
1248 
1249     if (eval1(&p, &rettv, TRUE) == FAIL)
1250 	retval = -1;
1251     else
1252     {
1253 	retval = get_tv_number_chk(&rettv, NULL);
1254 	clear_tv(&rettv);
1255     }
1256     --emsg_off;
1257 
1258     return retval;
1259 }
1260 
1261 /*
1262  * Prepare v: variable "idx" to be used.
1263  * Save the current typeval in "save_tv".
1264  * When not used yet add the variable to the v: hashtable.
1265  */
1266     static void
1267 prepare_vimvar(idx, save_tv)
1268     int		idx;
1269     typval_T	*save_tv;
1270 {
1271     *save_tv = vimvars[idx].vv_tv;
1272     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1273 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1274 }
1275 
1276 /*
1277  * Restore v: variable "idx" to typeval "save_tv".
1278  * When no longer defined, remove the variable from the v: hashtable.
1279  */
1280     static void
1281 restore_vimvar(idx, save_tv)
1282     int		idx;
1283     typval_T	*save_tv;
1284 {
1285     hashitem_T	*hi;
1286 
1287     clear_tv(&vimvars[idx].vv_tv);
1288     vimvars[idx].vv_tv = *save_tv;
1289     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1290     {
1291 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1292 	if (HASHITEM_EMPTY(hi))
1293 	    EMSG2(_(e_intern2), "restore_vimvar()");
1294 	else
1295 	    hash_remove(&vimvarht, hi);
1296     }
1297 }
1298 
1299 #if defined(FEAT_SPELL) || defined(PROTO)
1300 /*
1301  * Evaluate an expression to a list with suggestions.
1302  * For the "expr:" part of 'spellsuggest'.
1303  */
1304     list_T *
1305 eval_spell_expr(badword, expr)
1306     char_u	*badword;
1307     char_u	*expr;
1308 {
1309     typval_T	save_val;
1310     typval_T	rettv;
1311     list_T	*list = NULL;
1312     char_u	*p = skipwhite(expr);
1313 
1314     /* Set "v:val" to the bad word. */
1315     prepare_vimvar(VV_VAL, &save_val);
1316     vimvars[VV_VAL].vv_type = VAR_STRING;
1317     vimvars[VV_VAL].vv_str = badword;
1318     if (p_verbose == 0)
1319 	++emsg_off;
1320 
1321     if (eval1(&p, &rettv, TRUE) == OK)
1322     {
1323 	if (rettv.v_type != VAR_LIST)
1324 	    clear_tv(&rettv);
1325 	else
1326 	    list = rettv.vval.v_list;
1327     }
1328 
1329     if (p_verbose == 0)
1330 	--emsg_off;
1331     vimvars[VV_VAL].vv_str = NULL;
1332     restore_vimvar(VV_VAL, &save_val);
1333 
1334     return list;
1335 }
1336 
1337 /*
1338  * "list" is supposed to contain two items: a word and a number.  Return the
1339  * word in "pp" and the number as the return value.
1340  * Return -1 if anything isn't right.
1341  * Used to get the good word and score from the eval_spell_expr() result.
1342  */
1343     int
1344 get_spellword(list, pp)
1345     list_T	*list;
1346     char_u	**pp;
1347 {
1348     listitem_T	*li;
1349 
1350     li = list->lv_first;
1351     if (li == NULL)
1352 	return -1;
1353     *pp = get_tv_string(&li->li_tv);
1354 
1355     li = li->li_next;
1356     if (li == NULL)
1357 	return -1;
1358     return get_tv_number(&li->li_tv);
1359 }
1360 #endif
1361 
1362 /*
1363  * Top level evaluation function.
1364  * Returns an allocated typval_T with the result.
1365  * Returns NULL when there is an error.
1366  */
1367     typval_T *
1368 eval_expr(arg, nextcmd)
1369     char_u	*arg;
1370     char_u	**nextcmd;
1371 {
1372     typval_T	*tv;
1373 
1374     tv = (typval_T *)alloc(sizeof(typval_T));
1375     if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
1376     {
1377 	vim_free(tv);
1378 	tv = NULL;
1379     }
1380 
1381     return tv;
1382 }
1383 
1384 
1385 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1386 /*
1387  * Call some vimL function and return the result in "*rettv".
1388  * Uses argv[argc] for the function arguments.
1389  * Returns OK or FAIL.
1390  */
1391     static int
1392 call_vim_function(func, argc, argv, safe, rettv)
1393     char_u      *func;
1394     int		argc;
1395     char_u      **argv;
1396     int		safe;		/* use the sandbox */
1397     typval_T	*rettv;
1398 {
1399     typval_T	*argvars;
1400     long	n;
1401     int		len;
1402     int		i;
1403     int		doesrange;
1404     void	*save_funccalp = NULL;
1405     int		ret;
1406 
1407     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1408     if (argvars == NULL)
1409 	return FAIL;
1410 
1411     for (i = 0; i < argc; i++)
1412     {
1413 	/* Pass a NULL or empty argument as an empty string */
1414 	if (argv[i] == NULL || *argv[i] == NUL)
1415 	{
1416 	    argvars[i].v_type = VAR_STRING;
1417 	    argvars[i].vval.v_string = (char_u *)"";
1418 	    continue;
1419 	}
1420 
1421 	/* Recognize a number argument, the others must be strings. */
1422 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1423 	if (len != 0 && len == (int)STRLEN(argv[i]))
1424 	{
1425 	    argvars[i].v_type = VAR_NUMBER;
1426 	    argvars[i].vval.v_number = n;
1427 	}
1428 	else
1429 	{
1430 	    argvars[i].v_type = VAR_STRING;
1431 	    argvars[i].vval.v_string = argv[i];
1432 	}
1433     }
1434 
1435     if (safe)
1436     {
1437 	save_funccalp = save_funccal();
1438 	++sandbox;
1439     }
1440 
1441     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1442     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1443 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1444 		    &doesrange, TRUE, NULL);
1445     if (safe)
1446     {
1447 	--sandbox;
1448 	restore_funccal(save_funccalp);
1449     }
1450     vim_free(argvars);
1451 
1452     if (ret == FAIL)
1453 	clear_tv(rettv);
1454 
1455     return ret;
1456 }
1457 
1458 /*
1459  * Call vimL function "func" and return the result as a string.
1460  * Returns NULL when calling the function fails.
1461  * Uses argv[argc] for the function arguments.
1462  */
1463     void *
1464 call_func_retstr(func, argc, argv, safe)
1465     char_u      *func;
1466     int		argc;
1467     char_u      **argv;
1468     int		safe;		/* use the sandbox */
1469 {
1470     typval_T	rettv;
1471     char_u	*retval;
1472 
1473     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1474 	return NULL;
1475 
1476     retval = vim_strsave(get_tv_string(&rettv));
1477     clear_tv(&rettv);
1478     return retval;
1479 }
1480 
1481 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1482 /*
1483  * Call vimL function "func" and return the result as a number.
1484  * Returns -1 when calling the function fails.
1485  * Uses argv[argc] for the function arguments.
1486  */
1487     long
1488 call_func_retnr(func, argc, argv, safe)
1489     char_u      *func;
1490     int		argc;
1491     char_u      **argv;
1492     int		safe;		/* use the sandbox */
1493 {
1494     typval_T	rettv;
1495     long	retval;
1496 
1497     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1498 	return -1;
1499 
1500     retval = get_tv_number_chk(&rettv, NULL);
1501     clear_tv(&rettv);
1502     return retval;
1503 }
1504 #endif
1505 
1506 /*
1507  * Call vimL function "func" and return the result as a list
1508  * Uses argv[argc] for the function arguments.
1509  */
1510     void *
1511 call_func_retlist(func, argc, argv, safe)
1512     char_u      *func;
1513     int		argc;
1514     char_u      **argv;
1515     int		safe;		/* use the sandbox */
1516 {
1517     typval_T	rettv;
1518 
1519     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1520 	return NULL;
1521 
1522     if (rettv.v_type != VAR_LIST)
1523     {
1524 	clear_tv(&rettv);
1525 	return NULL;
1526     }
1527 
1528     return rettv.vval.v_list;
1529 }
1530 
1531 #endif
1532 
1533 /*
1534  * Save the current function call pointer, and set it to NULL.
1535  * Used when executing autocommands and for ":source".
1536  */
1537     void *
1538 save_funccal()
1539 {
1540     funccall_T *fc = current_funccal;
1541 
1542     current_funccal = NULL;
1543     return (void *)fc;
1544 }
1545 
1546     void
1547 restore_funccal(vfc)
1548     void *vfc;
1549 {
1550     funccall_T *fc = (funccall_T *)vfc;
1551 
1552     current_funccal = fc;
1553 }
1554 
1555 #if defined(FEAT_PROFILE) || defined(PROTO)
1556 /*
1557  * Prepare profiling for entering a child or something else that is not
1558  * counted for the script/function itself.
1559  * Should always be called in pair with prof_child_exit().
1560  */
1561     void
1562 prof_child_enter(tm)
1563     proftime_T *tm;	/* place to store waittime */
1564 {
1565     funccall_T *fc = current_funccal;
1566 
1567     if (fc != NULL && fc->func->uf_profiling)
1568 	profile_start(&fc->prof_child);
1569     script_prof_save(tm);
1570 }
1571 
1572 /*
1573  * Take care of time spent in a child.
1574  * Should always be called after prof_child_enter().
1575  */
1576     void
1577 prof_child_exit(tm)
1578     proftime_T *tm;	/* where waittime was stored */
1579 {
1580     funccall_T *fc = current_funccal;
1581 
1582     if (fc != NULL && fc->func->uf_profiling)
1583     {
1584 	profile_end(&fc->prof_child);
1585 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1586 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1587 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1588     }
1589     script_prof_restore(tm);
1590 }
1591 #endif
1592 
1593 
1594 #ifdef FEAT_FOLDING
1595 /*
1596  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1597  * it in "*cp".  Doesn't give error messages.
1598  */
1599     int
1600 eval_foldexpr(arg, cp)
1601     char_u	*arg;
1602     int		*cp;
1603 {
1604     typval_T	tv;
1605     int		retval;
1606     char_u	*s;
1607     int		use_sandbox = was_set_insecurely((char_u *)"foldexpr",
1608 								   OPT_LOCAL);
1609 
1610     ++emsg_off;
1611     if (use_sandbox)
1612 	++sandbox;
1613     ++textlock;
1614     *cp = NUL;
1615     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1616 	retval = 0;
1617     else
1618     {
1619 	/* If the result is a number, just return the number. */
1620 	if (tv.v_type == VAR_NUMBER)
1621 	    retval = tv.vval.v_number;
1622 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1623 	    retval = 0;
1624 	else
1625 	{
1626 	    /* If the result is a string, check if there is a non-digit before
1627 	     * the number. */
1628 	    s = tv.vval.v_string;
1629 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1630 		*cp = *s++;
1631 	    retval = atol((char *)s);
1632 	}
1633 	clear_tv(&tv);
1634     }
1635     --emsg_off;
1636     if (use_sandbox)
1637 	--sandbox;
1638     --textlock;
1639 
1640     return retval;
1641 }
1642 #endif
1643 
1644 /*
1645  * ":let"			list all variable values
1646  * ":let var1 var2"		list variable values
1647  * ":let var = expr"		assignment command.
1648  * ":let var += expr"		assignment command.
1649  * ":let var -= expr"		assignment command.
1650  * ":let var .= expr"		assignment command.
1651  * ":let [var1, var2] = expr"	unpack list.
1652  */
1653     void
1654 ex_let(eap)
1655     exarg_T	*eap;
1656 {
1657     char_u	*arg = eap->arg;
1658     char_u	*expr = NULL;
1659     typval_T	rettv;
1660     int		i;
1661     int		var_count = 0;
1662     int		semicolon = 0;
1663     char_u	op[2];
1664     char_u	*argend;
1665 
1666     argend = skip_var_list(arg, &var_count, &semicolon);
1667     if (argend == NULL)
1668 	return;
1669     if (argend > arg && argend[-1] == '.')  /* for var.='str' */
1670 	--argend;
1671     expr = vim_strchr(argend, '=');
1672     if (expr == NULL)
1673     {
1674 	/*
1675 	 * ":let" without "=": list variables
1676 	 */
1677 	if (*arg == '[')
1678 	    EMSG(_(e_invarg));
1679 	else if (!ends_excmd(*arg))
1680 	    /* ":let var1 var2" */
1681 	    arg = list_arg_vars(eap, arg);
1682 	else if (!eap->skip)
1683 	{
1684 	    /* ":let" */
1685 	    list_glob_vars();
1686 	    list_buf_vars();
1687 	    list_win_vars();
1688 	    list_script_vars();
1689 	    list_func_vars();
1690 	    list_vim_vars();
1691 	}
1692 	eap->nextcmd = check_nextcmd(arg);
1693     }
1694     else
1695     {
1696 	op[0] = '=';
1697 	op[1] = NUL;
1698 	if (expr > argend)
1699 	{
1700 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1701 		op[0] = expr[-1];   /* +=, -= or .= */
1702 	}
1703 	expr = skipwhite(expr + 1);
1704 
1705 	if (eap->skip)
1706 	    ++emsg_skip;
1707 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1708 	if (eap->skip)
1709 	{
1710 	    if (i != FAIL)
1711 		clear_tv(&rettv);
1712 	    --emsg_skip;
1713 	}
1714 	else if (i != FAIL)
1715 	{
1716 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1717 									  op);
1718 	    clear_tv(&rettv);
1719 	}
1720     }
1721 }
1722 
1723 /*
1724  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1725  * Handles both "var" with any type and "[var, var; var]" with a list type.
1726  * When "nextchars" is not NULL it points to a string with characters that
1727  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1728  * or concatenate.
1729  * Returns OK or FAIL;
1730  */
1731     static int
1732 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1733     char_u	*arg_start;
1734     typval_T	*tv;
1735     int		copy;		/* copy values from "tv", don't move */
1736     int		semicolon;	/* from skip_var_list() */
1737     int		var_count;	/* from skip_var_list() */
1738     char_u	*nextchars;
1739 {
1740     char_u	*arg = arg_start;
1741     list_T	*l;
1742     int		i;
1743     listitem_T	*item;
1744     typval_T	ltv;
1745 
1746     if (*arg != '[')
1747     {
1748 	/*
1749 	 * ":let var = expr" or ":for var in list"
1750 	 */
1751 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1752 	    return FAIL;
1753 	return OK;
1754     }
1755 
1756     /*
1757      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1758      */
1759     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1760     {
1761 	EMSG(_(e_listreq));
1762 	return FAIL;
1763     }
1764 
1765     i = list_len(l);
1766     if (semicolon == 0 && var_count < i)
1767     {
1768 	EMSG(_("E687: Less targets than List items"));
1769 	return FAIL;
1770     }
1771     if (var_count - semicolon > i)
1772     {
1773 	EMSG(_("E688: More targets than List items"));
1774 	return FAIL;
1775     }
1776 
1777     item = l->lv_first;
1778     while (*arg != ']')
1779     {
1780 	arg = skipwhite(arg + 1);
1781 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1782 	item = item->li_next;
1783 	if (arg == NULL)
1784 	    return FAIL;
1785 
1786 	arg = skipwhite(arg);
1787 	if (*arg == ';')
1788 	{
1789 	    /* Put the rest of the list (may be empty) in the var after ';'.
1790 	     * Create a new list for this. */
1791 	    l = list_alloc();
1792 	    if (l == NULL)
1793 		return FAIL;
1794 	    while (item != NULL)
1795 	    {
1796 		list_append_tv(l, &item->li_tv);
1797 		item = item->li_next;
1798 	    }
1799 
1800 	    ltv.v_type = VAR_LIST;
1801 	    ltv.v_lock = 0;
1802 	    ltv.vval.v_list = l;
1803 	    l->lv_refcount = 1;
1804 
1805 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1806 						    (char_u *)"]", nextchars);
1807 	    clear_tv(&ltv);
1808 	    if (arg == NULL)
1809 		return FAIL;
1810 	    break;
1811 	}
1812 	else if (*arg != ',' && *arg != ']')
1813 	{
1814 	    EMSG2(_(e_intern2), "ex_let_vars()");
1815 	    return FAIL;
1816 	}
1817     }
1818 
1819     return OK;
1820 }
1821 
1822 /*
1823  * Skip over assignable variable "var" or list of variables "[var, var]".
1824  * Used for ":let varvar = expr" and ":for varvar in expr".
1825  * For "[var, var]" increment "*var_count" for each variable.
1826  * for "[var, var; var]" set "semicolon".
1827  * Return NULL for an error.
1828  */
1829     static char_u *
1830 skip_var_list(arg, var_count, semicolon)
1831     char_u	*arg;
1832     int		*var_count;
1833     int		*semicolon;
1834 {
1835     char_u	*p, *s;
1836 
1837     if (*arg == '[')
1838     {
1839 	/* "[var, var]": find the matching ']'. */
1840 	p = arg;
1841 	for (;;)
1842 	{
1843 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1844 	    s = skip_var_one(p);
1845 	    if (s == p)
1846 	    {
1847 		EMSG2(_(e_invarg2), p);
1848 		return NULL;
1849 	    }
1850 	    ++*var_count;
1851 
1852 	    p = skipwhite(s);
1853 	    if (*p == ']')
1854 		break;
1855 	    else if (*p == ';')
1856 	    {
1857 		if (*semicolon == 1)
1858 		{
1859 		    EMSG(_("Double ; in list of variables"));
1860 		    return NULL;
1861 		}
1862 		*semicolon = 1;
1863 	    }
1864 	    else if (*p != ',')
1865 	    {
1866 		EMSG2(_(e_invarg2), p);
1867 		return NULL;
1868 	    }
1869 	}
1870 	return p + 1;
1871     }
1872     else
1873 	return skip_var_one(arg);
1874 }
1875 
1876 /*
1877  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1878  * l[idx].
1879  */
1880     static char_u *
1881 skip_var_one(arg)
1882     char_u	*arg;
1883 {
1884     if (*arg == '@' && arg[1] != NUL)
1885 	return arg + 2;
1886     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1887 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1888 }
1889 
1890 /*
1891  * List variables for hashtab "ht" with prefix "prefix".
1892  * If "empty" is TRUE also list NULL strings as empty strings.
1893  */
1894     static void
1895 list_hashtable_vars(ht, prefix, empty)
1896     hashtab_T	*ht;
1897     char_u	*prefix;
1898     int		empty;
1899 {
1900     hashitem_T	*hi;
1901     dictitem_T	*di;
1902     int		todo;
1903 
1904     todo = ht->ht_used;
1905     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1906     {
1907 	if (!HASHITEM_EMPTY(hi))
1908 	{
1909 	    --todo;
1910 	    di = HI2DI(hi);
1911 	    if (empty || di->di_tv.v_type != VAR_STRING
1912 					   || di->di_tv.vval.v_string != NULL)
1913 		list_one_var(di, prefix);
1914 	}
1915     }
1916 }
1917 
1918 /*
1919  * List global variables.
1920  */
1921     static void
1922 list_glob_vars()
1923 {
1924     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1925 }
1926 
1927 /*
1928  * List buffer variables.
1929  */
1930     static void
1931 list_buf_vars()
1932 {
1933     char_u	numbuf[NUMBUFLEN];
1934 
1935     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1936 
1937     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1938     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1939 }
1940 
1941 /*
1942  * List window variables.
1943  */
1944     static void
1945 list_win_vars()
1946 {
1947     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1948 }
1949 
1950 /*
1951  * List Vim variables.
1952  */
1953     static void
1954 list_vim_vars()
1955 {
1956     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1957 }
1958 
1959 /*
1960  * List script-local variables, if there is a script.
1961  */
1962     static void
1963 list_script_vars()
1964 {
1965     if (current_SID > 0 && current_SID <= ga_scripts.ga_len)
1966 	list_hashtable_vars(&SCRIPT_VARS(current_SID), (char_u *)"s:", FALSE);
1967 }
1968 
1969 /*
1970  * List function variables, if there is a function.
1971  */
1972     static void
1973 list_func_vars()
1974 {
1975     if (current_funccal != NULL)
1976 	list_hashtable_vars(&current_funccal->l_vars.dv_hashtab,
1977 						       (char_u *)"l:", FALSE);
1978 }
1979 
1980 /*
1981  * List variables in "arg".
1982  */
1983     static char_u *
1984 list_arg_vars(eap, arg)
1985     exarg_T	*eap;
1986     char_u	*arg;
1987 {
1988     int		error = FALSE;
1989     int		len;
1990     char_u	*name;
1991     char_u	*name_start;
1992     char_u	*arg_subsc;
1993     char_u	*tofree;
1994     typval_T    tv;
1995 
1996     while (!ends_excmd(*arg) && !got_int)
1997     {
1998 	if (error || eap->skip)
1999 	{
2000 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
2001 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
2002 	    {
2003 		emsg_severe = TRUE;
2004 		EMSG(_(e_trailing));
2005 		break;
2006 	    }
2007 	}
2008 	else
2009 	{
2010 	    /* get_name_len() takes care of expanding curly braces */
2011 	    name_start = name = arg;
2012 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
2013 	    if (len <= 0)
2014 	    {
2015 		/* This is mainly to keep test 49 working: when expanding
2016 		 * curly braces fails overrule the exception error message. */
2017 		if (len < 0 && !aborting())
2018 		{
2019 		    emsg_severe = TRUE;
2020 		    EMSG2(_(e_invarg2), arg);
2021 		    break;
2022 		}
2023 		error = TRUE;
2024 	    }
2025 	    else
2026 	    {
2027 		if (tofree != NULL)
2028 		    name = tofree;
2029 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
2030 		    error = TRUE;
2031 		else
2032 		{
2033 		    /* handle d.key, l[idx], f(expr) */
2034 		    arg_subsc = arg;
2035 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
2036 			error = TRUE;
2037 		    else
2038 		    {
2039 			if (arg == arg_subsc && len == 2 && name[1] == ':')
2040 			{
2041 			    switch (*name)
2042 			    {
2043 				case 'g': list_glob_vars(); break;
2044 				case 'b': list_buf_vars(); break;
2045 				case 'w': list_win_vars(); break;
2046 				case 'v': list_vim_vars(); break;
2047 				case 's': list_script_vars(); break;
2048 				case 'l': list_func_vars(); break;
2049 				default:
2050 					  EMSG2(_("E738: Can't list variables for %s"), name);
2051 			    }
2052 			}
2053 			else
2054 			{
2055 			    char_u	numbuf[NUMBUFLEN];
2056 			    char_u	*tf;
2057 			    int		c;
2058 			    char_u	*s;
2059 
2060 			    s = echo_string(&tv, &tf, numbuf, 0);
2061 			    c = *arg;
2062 			    *arg = NUL;
2063 			    list_one_var_a((char_u *)"",
2064 				    arg == arg_subsc ? name : name_start,
2065 				    tv.v_type, s == NULL ? (char_u *)"" : s);
2066 			    *arg = c;
2067 			    vim_free(tf);
2068 			}
2069 			clear_tv(&tv);
2070 		    }
2071 		}
2072 	    }
2073 
2074 	    vim_free(tofree);
2075 	}
2076 
2077 	arg = skipwhite(arg);
2078     }
2079 
2080     return arg;
2081 }
2082 
2083 /*
2084  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2085  * Returns a pointer to the char just after the var name.
2086  * Returns NULL if there is an error.
2087  */
2088     static char_u *
2089 ex_let_one(arg, tv, copy, endchars, op)
2090     char_u	*arg;		/* points to variable name */
2091     typval_T	*tv;		/* value to assign to variable */
2092     int		copy;		/* copy value from "tv" */
2093     char_u	*endchars;	/* valid chars after variable name  or NULL */
2094     char_u	*op;		/* "+", "-", "."  or NULL*/
2095 {
2096     int		c1;
2097     char_u	*name;
2098     char_u	*p;
2099     char_u	*arg_end = NULL;
2100     int		len;
2101     int		opt_flags;
2102     char_u	*tofree = NULL;
2103 
2104     /*
2105      * ":let $VAR = expr": Set environment variable.
2106      */
2107     if (*arg == '$')
2108     {
2109 	/* Find the end of the name. */
2110 	++arg;
2111 	name = arg;
2112 	len = get_env_len(&arg);
2113 	if (len == 0)
2114 	    EMSG2(_(e_invarg2), name - 1);
2115 	else
2116 	{
2117 	    if (op != NULL && (*op == '+' || *op == '-'))
2118 		EMSG2(_(e_letwrong), op);
2119 	    else if (endchars != NULL
2120 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2121 		EMSG(_(e_letunexp));
2122 	    else
2123 	    {
2124 		c1 = name[len];
2125 		name[len] = NUL;
2126 		p = get_tv_string_chk(tv);
2127 		if (p != NULL && op != NULL && *op == '.')
2128 		{
2129 		    int	    mustfree = FALSE;
2130 		    char_u  *s = vim_getenv(name, &mustfree);
2131 
2132 		    if (s != NULL)
2133 		    {
2134 			p = tofree = concat_str(s, p);
2135 			if (mustfree)
2136 			    vim_free(s);
2137 		    }
2138 		}
2139 		if (p != NULL)
2140 		{
2141 		    vim_setenv(name, p);
2142 		    if (STRICMP(name, "HOME") == 0)
2143 			init_homedir();
2144 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2145 			didset_vim = FALSE;
2146 		    else if (didset_vimruntime
2147 					&& STRICMP(name, "VIMRUNTIME") == 0)
2148 			didset_vimruntime = FALSE;
2149 		    arg_end = arg;
2150 		}
2151 		name[len] = c1;
2152 		vim_free(tofree);
2153 	    }
2154 	}
2155     }
2156 
2157     /*
2158      * ":let &option = expr": Set option value.
2159      * ":let &l:option = expr": Set local option value.
2160      * ":let &g:option = expr": Set global option value.
2161      */
2162     else if (*arg == '&')
2163     {
2164 	/* Find the end of the name. */
2165 	p = find_option_end(&arg, &opt_flags);
2166 	if (p == NULL || (endchars != NULL
2167 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2168 	    EMSG(_(e_letunexp));
2169 	else
2170 	{
2171 	    long	n;
2172 	    int		opt_type;
2173 	    long	numval;
2174 	    char_u	*stringval = NULL;
2175 	    char_u	*s;
2176 
2177 	    c1 = *p;
2178 	    *p = NUL;
2179 
2180 	    n = get_tv_number(tv);
2181 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2182 	    if (s != NULL && op != NULL && *op != '=')
2183 	    {
2184 		opt_type = get_option_value(arg, &numval,
2185 						       &stringval, opt_flags);
2186 		if ((opt_type == 1 && *op == '.')
2187 			|| (opt_type == 0 && *op != '.'))
2188 		    EMSG2(_(e_letwrong), op);
2189 		else
2190 		{
2191 		    if (opt_type == 1)  /* number */
2192 		    {
2193 			if (*op == '+')
2194 			    n = numval + n;
2195 			else
2196 			    n = numval - n;
2197 		    }
2198 		    else if (opt_type == 0 && stringval != NULL) /* string */
2199 		    {
2200 			s = concat_str(stringval, s);
2201 			vim_free(stringval);
2202 			stringval = s;
2203 		    }
2204 		}
2205 	    }
2206 	    if (s != NULL)
2207 	    {
2208 		set_option_value(arg, n, s, opt_flags);
2209 		arg_end = p;
2210 	    }
2211 	    *p = c1;
2212 	    vim_free(stringval);
2213 	}
2214     }
2215 
2216     /*
2217      * ":let @r = expr": Set register contents.
2218      */
2219     else if (*arg == '@')
2220     {
2221 	++arg;
2222 	if (op != NULL && (*op == '+' || *op == '-'))
2223 	    EMSG2(_(e_letwrong), op);
2224 	else if (endchars != NULL
2225 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2226 	    EMSG(_(e_letunexp));
2227 	else
2228 	{
2229 	    char_u	*tofree = NULL;
2230 	    char_u	*s;
2231 
2232 	    p = get_tv_string_chk(tv);
2233 	    if (p != NULL && op != NULL && *op == '.')
2234 	    {
2235 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2236 		if (s != NULL)
2237 		{
2238 		    p = tofree = concat_str(s, p);
2239 		    vim_free(s);
2240 		}
2241 	    }
2242 	    if (p != NULL)
2243 	    {
2244 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2245 		arg_end = arg + 1;
2246 	    }
2247 	    vim_free(tofree);
2248 	}
2249     }
2250 
2251     /*
2252      * ":let var = expr": Set internal variable.
2253      * ":let {expr} = expr": Idem, name made with curly braces
2254      */
2255     else if (eval_isnamec1(*arg) || *arg == '{')
2256     {
2257 	lval_T	lv;
2258 
2259 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2260 	if (p != NULL && lv.ll_name != NULL)
2261 	{
2262 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2263 		EMSG(_(e_letunexp));
2264 	    else
2265 	    {
2266 		set_var_lval(&lv, p, tv, copy, op);
2267 		arg_end = p;
2268 	    }
2269 	}
2270 	clear_lval(&lv);
2271     }
2272 
2273     else
2274 	EMSG2(_(e_invarg2), arg);
2275 
2276     return arg_end;
2277 }
2278 
2279 /*
2280  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2281  */
2282     static int
2283 check_changedtick(arg)
2284     char_u	*arg;
2285 {
2286     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2287     {
2288 	EMSG2(_(e_readonlyvar), arg);
2289 	return TRUE;
2290     }
2291     return FALSE;
2292 }
2293 
2294 /*
2295  * Get an lval: variable, Dict item or List item that can be assigned a value
2296  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2297  * "name.key", "name.key[expr]" etc.
2298  * Indexing only works if "name" is an existing List or Dictionary.
2299  * "name" points to the start of the name.
2300  * If "rettv" is not NULL it points to the value to be assigned.
2301  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2302  * wrong; must end in space or cmd separator.
2303  *
2304  * Returns a pointer to just after the name, including indexes.
2305  * When an evaluation error occurs "lp->ll_name" is NULL;
2306  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2307  */
2308     static char_u *
2309 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2310     char_u	*name;
2311     typval_T	*rettv;
2312     lval_T	*lp;
2313     int		unlet;
2314     int		skip;
2315     int		quiet;	    /* don't give error messages */
2316     int		fne_flags;  /* flags for find_name_end() */
2317 {
2318     char_u	*p;
2319     char_u	*expr_start, *expr_end;
2320     int		cc;
2321     dictitem_T	*v;
2322     typval_T	var1;
2323     typval_T	var2;
2324     int		empty1 = FALSE;
2325     listitem_T	*ni;
2326     char_u	*key = NULL;
2327     int		len;
2328     hashtab_T	*ht;
2329 
2330     /* Clear everything in "lp". */
2331     vim_memset(lp, 0, sizeof(lval_T));
2332 
2333     if (skip)
2334     {
2335 	/* When skipping just find the end of the name. */
2336 	lp->ll_name = name;
2337 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2338     }
2339 
2340     /* Find the end of the name. */
2341     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2342     if (expr_start != NULL)
2343     {
2344 	/* Don't expand the name when we already know there is an error. */
2345 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2346 						    && *p != '[' && *p != '.')
2347 	{
2348 	    EMSG(_(e_trailing));
2349 	    return NULL;
2350 	}
2351 
2352 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2353 	if (lp->ll_exp_name == NULL)
2354 	{
2355 	    /* Report an invalid expression in braces, unless the
2356 	     * expression evaluation has been cancelled due to an
2357 	     * aborting error, an interrupt, or an exception. */
2358 	    if (!aborting() && !quiet)
2359 	    {
2360 		emsg_severe = TRUE;
2361 		EMSG2(_(e_invarg2), name);
2362 		return NULL;
2363 	    }
2364 	}
2365 	lp->ll_name = lp->ll_exp_name;
2366     }
2367     else
2368 	lp->ll_name = name;
2369 
2370     /* Without [idx] or .key we are done. */
2371     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2372 	return p;
2373 
2374     cc = *p;
2375     *p = NUL;
2376     v = find_var(lp->ll_name, &ht);
2377     if (v == NULL && !quiet)
2378 	EMSG2(_(e_undefvar), lp->ll_name);
2379     *p = cc;
2380     if (v == NULL)
2381 	return NULL;
2382 
2383     /*
2384      * Loop until no more [idx] or .key is following.
2385      */
2386     lp->ll_tv = &v->di_tv;
2387     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2388     {
2389 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2390 		&& !(lp->ll_tv->v_type == VAR_DICT
2391 					   && lp->ll_tv->vval.v_dict != NULL))
2392 	{
2393 	    if (!quiet)
2394 		EMSG(_("E689: Can only index a List or Dictionary"));
2395 	    return NULL;
2396 	}
2397 	if (lp->ll_range)
2398 	{
2399 	    if (!quiet)
2400 		EMSG(_("E708: [:] must come last"));
2401 	    return NULL;
2402 	}
2403 
2404 	len = -1;
2405 	if (*p == '.')
2406 	{
2407 	    key = p + 1;
2408 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2409 		;
2410 	    if (len == 0)
2411 	    {
2412 		if (!quiet)
2413 		    EMSG(_(e_emptykey));
2414 		return NULL;
2415 	    }
2416 	    p = key + len;
2417 	}
2418 	else
2419 	{
2420 	    /* Get the index [expr] or the first index [expr: ]. */
2421 	    p = skipwhite(p + 1);
2422 	    if (*p == ':')
2423 		empty1 = TRUE;
2424 	    else
2425 	    {
2426 		empty1 = FALSE;
2427 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2428 		    return NULL;
2429 		if (get_tv_string_chk(&var1) == NULL)
2430 		{
2431 		    /* not a number or string */
2432 		    clear_tv(&var1);
2433 		    return NULL;
2434 		}
2435 	    }
2436 
2437 	    /* Optionally get the second index [ :expr]. */
2438 	    if (*p == ':')
2439 	    {
2440 		if (lp->ll_tv->v_type == VAR_DICT)
2441 		{
2442 		    if (!quiet)
2443 			EMSG(_(e_dictrange));
2444 		    if (!empty1)
2445 			clear_tv(&var1);
2446 		    return NULL;
2447 		}
2448 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2449 					       || rettv->vval.v_list == NULL))
2450 		{
2451 		    if (!quiet)
2452 			EMSG(_("E709: [:] requires a List value"));
2453 		    if (!empty1)
2454 			clear_tv(&var1);
2455 		    return NULL;
2456 		}
2457 		p = skipwhite(p + 1);
2458 		if (*p == ']')
2459 		    lp->ll_empty2 = TRUE;
2460 		else
2461 		{
2462 		    lp->ll_empty2 = FALSE;
2463 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2464 		    {
2465 			if (!empty1)
2466 			    clear_tv(&var1);
2467 			return NULL;
2468 		    }
2469 		    if (get_tv_string_chk(&var2) == NULL)
2470 		    {
2471 			/* not a number or string */
2472 			if (!empty1)
2473 			    clear_tv(&var1);
2474 			clear_tv(&var2);
2475 			return NULL;
2476 		    }
2477 		}
2478 		lp->ll_range = TRUE;
2479 	    }
2480 	    else
2481 		lp->ll_range = FALSE;
2482 
2483 	    if (*p != ']')
2484 	    {
2485 		if (!quiet)
2486 		    EMSG(_(e_missbrac));
2487 		if (!empty1)
2488 		    clear_tv(&var1);
2489 		if (lp->ll_range && !lp->ll_empty2)
2490 		    clear_tv(&var2);
2491 		return NULL;
2492 	    }
2493 
2494 	    /* Skip to past ']'. */
2495 	    ++p;
2496 	}
2497 
2498 	if (lp->ll_tv->v_type == VAR_DICT)
2499 	{
2500 	    if (len == -1)
2501 	    {
2502 		/* "[key]": get key from "var1" */
2503 		key = get_tv_string(&var1);	/* is number or string */
2504 		if (*key == NUL)
2505 		{
2506 		    if (!quiet)
2507 			EMSG(_(e_emptykey));
2508 		    clear_tv(&var1);
2509 		    return NULL;
2510 		}
2511 	    }
2512 	    lp->ll_list = NULL;
2513 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2514 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2515 	    if (lp->ll_di == NULL)
2516 	    {
2517 		/* Key does not exist in dict: may need to add it. */
2518 		if (*p == '[' || *p == '.' || unlet)
2519 		{
2520 		    if (!quiet)
2521 			EMSG2(_(e_dictkey), key);
2522 		    if (len == -1)
2523 			clear_tv(&var1);
2524 		    return NULL;
2525 		}
2526 		if (len == -1)
2527 		    lp->ll_newkey = vim_strsave(key);
2528 		else
2529 		    lp->ll_newkey = vim_strnsave(key, len);
2530 		if (len == -1)
2531 		    clear_tv(&var1);
2532 		if (lp->ll_newkey == NULL)
2533 		    p = NULL;
2534 		break;
2535 	    }
2536 	    if (len == -1)
2537 		clear_tv(&var1);
2538 	    lp->ll_tv = &lp->ll_di->di_tv;
2539 	}
2540 	else
2541 	{
2542 	    /*
2543 	     * Get the number and item for the only or first index of the List.
2544 	     */
2545 	    if (empty1)
2546 		lp->ll_n1 = 0;
2547 	    else
2548 	    {
2549 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2550 		clear_tv(&var1);
2551 	    }
2552 	    lp->ll_dict = NULL;
2553 	    lp->ll_list = lp->ll_tv->vval.v_list;
2554 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2555 	    if (lp->ll_li == NULL)
2556 	    {
2557 		if (!quiet)
2558 		    EMSGN(_(e_listidx), lp->ll_n1);
2559 		if (lp->ll_range && !lp->ll_empty2)
2560 		    clear_tv(&var2);
2561 		return NULL;
2562 	    }
2563 
2564 	    /*
2565 	     * May need to find the item or absolute index for the second
2566 	     * index of a range.
2567 	     * When no index given: "lp->ll_empty2" is TRUE.
2568 	     * Otherwise "lp->ll_n2" is set to the second index.
2569 	     */
2570 	    if (lp->ll_range && !lp->ll_empty2)
2571 	    {
2572 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2573 		clear_tv(&var2);
2574 		if (lp->ll_n2 < 0)
2575 		{
2576 		    ni = list_find(lp->ll_list, lp->ll_n2);
2577 		    if (ni == NULL)
2578 		    {
2579 			if (!quiet)
2580 			    EMSGN(_(e_listidx), lp->ll_n2);
2581 			return NULL;
2582 		    }
2583 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2584 		}
2585 
2586 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2587 		if (lp->ll_n1 < 0)
2588 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2589 		if (lp->ll_n2 < lp->ll_n1)
2590 		{
2591 		    if (!quiet)
2592 			EMSGN(_(e_listidx), lp->ll_n2);
2593 		    return NULL;
2594 		}
2595 	    }
2596 
2597 	    lp->ll_tv = &lp->ll_li->li_tv;
2598 	}
2599     }
2600 
2601     return p;
2602 }
2603 
2604 /*
2605  * Clear lval "lp" that was filled by get_lval().
2606  */
2607     static void
2608 clear_lval(lp)
2609     lval_T	*lp;
2610 {
2611     vim_free(lp->ll_exp_name);
2612     vim_free(lp->ll_newkey);
2613 }
2614 
2615 /*
2616  * Set a variable that was parsed by get_lval() to "rettv".
2617  * "endp" points to just after the parsed name.
2618  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2619  */
2620     static void
2621 set_var_lval(lp, endp, rettv, copy, op)
2622     lval_T	*lp;
2623     char_u	*endp;
2624     typval_T	*rettv;
2625     int		copy;
2626     char_u	*op;
2627 {
2628     int		cc;
2629     listitem_T	*ri;
2630     dictitem_T	*di;
2631 
2632     if (lp->ll_tv == NULL)
2633     {
2634 	if (!check_changedtick(lp->ll_name))
2635 	{
2636 	    cc = *endp;
2637 	    *endp = NUL;
2638 	    if (op != NULL && *op != '=')
2639 	    {
2640 		typval_T tv;
2641 
2642 		/* handle +=, -= and .= */
2643 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2644 							     &tv, TRUE) == OK)
2645 		{
2646 		    if (tv_op(&tv, rettv, op) == OK)
2647 			set_var(lp->ll_name, &tv, FALSE);
2648 		    clear_tv(&tv);
2649 		}
2650 	    }
2651 	    else
2652 		set_var(lp->ll_name, rettv, copy);
2653 	    *endp = cc;
2654 	}
2655     }
2656     else if (tv_check_lock(lp->ll_newkey == NULL
2657 		? lp->ll_tv->v_lock
2658 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2659 	;
2660     else if (lp->ll_range)
2661     {
2662 	/*
2663 	 * Assign the List values to the list items.
2664 	 */
2665 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2666 	{
2667 	    if (op != NULL && *op != '=')
2668 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2669 	    else
2670 	    {
2671 		clear_tv(&lp->ll_li->li_tv);
2672 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2673 	    }
2674 	    ri = ri->li_next;
2675 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2676 		break;
2677 	    if (lp->ll_li->li_next == NULL)
2678 	    {
2679 		/* Need to add an empty item. */
2680 		if (list_append_number(lp->ll_list, 0) == FAIL)
2681 		{
2682 		    ri = NULL;
2683 		    break;
2684 		}
2685 	    }
2686 	    lp->ll_li = lp->ll_li->li_next;
2687 	    ++lp->ll_n1;
2688 	}
2689 	if (ri != NULL)
2690 	    EMSG(_("E710: List value has more items than target"));
2691 	else if (lp->ll_empty2
2692 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2693 		: lp->ll_n1 != lp->ll_n2)
2694 	    EMSG(_("E711: List value has not enough items"));
2695     }
2696     else
2697     {
2698 	/*
2699 	 * Assign to a List or Dictionary item.
2700 	 */
2701 	if (lp->ll_newkey != NULL)
2702 	{
2703 	    if (op != NULL && *op != '=')
2704 	    {
2705 		EMSG2(_(e_letwrong), op);
2706 		return;
2707 	    }
2708 
2709 	    /* Need to add an item to the Dictionary. */
2710 	    di = dictitem_alloc(lp->ll_newkey);
2711 	    if (di == NULL)
2712 		return;
2713 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2714 	    {
2715 		vim_free(di);
2716 		return;
2717 	    }
2718 	    lp->ll_tv = &di->di_tv;
2719 	}
2720 	else if (op != NULL && *op != '=')
2721 	{
2722 	    tv_op(lp->ll_tv, rettv, op);
2723 	    return;
2724 	}
2725 	else
2726 	    clear_tv(lp->ll_tv);
2727 
2728 	/*
2729 	 * Assign the value to the variable or list item.
2730 	 */
2731 	if (copy)
2732 	    copy_tv(rettv, lp->ll_tv);
2733 	else
2734 	{
2735 	    *lp->ll_tv = *rettv;
2736 	    lp->ll_tv->v_lock = 0;
2737 	    init_tv(rettv);
2738 	}
2739     }
2740 }
2741 
2742 /*
2743  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2744  * Returns OK or FAIL.
2745  */
2746     static int
2747 tv_op(tv1, tv2, op)
2748     typval_T *tv1;
2749     typval_T *tv2;
2750     char_u  *op;
2751 {
2752     long	n;
2753     char_u	numbuf[NUMBUFLEN];
2754     char_u	*s;
2755 
2756     /* Can't do anything with a Funcref or a Dict on the right. */
2757     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2758     {
2759 	switch (tv1->v_type)
2760 	{
2761 	    case VAR_DICT:
2762 	    case VAR_FUNC:
2763 		break;
2764 
2765 	    case VAR_LIST:
2766 		if (*op != '+' || tv2->v_type != VAR_LIST)
2767 		    break;
2768 		/* List += List */
2769 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2770 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2771 		return OK;
2772 
2773 	    case VAR_NUMBER:
2774 	    case VAR_STRING:
2775 		if (tv2->v_type == VAR_LIST)
2776 		    break;
2777 		if (*op == '+' || *op == '-')
2778 		{
2779 		    /* nr += nr  or  nr -= nr*/
2780 		    n = get_tv_number(tv1);
2781 		    if (*op == '+')
2782 			n += get_tv_number(tv2);
2783 		    else
2784 			n -= get_tv_number(tv2);
2785 		    clear_tv(tv1);
2786 		    tv1->v_type = VAR_NUMBER;
2787 		    tv1->vval.v_number = n;
2788 		}
2789 		else
2790 		{
2791 		    /* str .= str */
2792 		    s = get_tv_string(tv1);
2793 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2794 		    clear_tv(tv1);
2795 		    tv1->v_type = VAR_STRING;
2796 		    tv1->vval.v_string = s;
2797 		}
2798 		return OK;
2799 	}
2800     }
2801 
2802     EMSG2(_(e_letwrong), op);
2803     return FAIL;
2804 }
2805 
2806 /*
2807  * Add a watcher to a list.
2808  */
2809     static void
2810 list_add_watch(l, lw)
2811     list_T	*l;
2812     listwatch_T	*lw;
2813 {
2814     lw->lw_next = l->lv_watch;
2815     l->lv_watch = lw;
2816 }
2817 
2818 /*
2819  * Remove a watcher from a list.
2820  * No warning when it isn't found...
2821  */
2822     static void
2823 list_rem_watch(l, lwrem)
2824     list_T	*l;
2825     listwatch_T	*lwrem;
2826 {
2827     listwatch_T	*lw, **lwp;
2828 
2829     lwp = &l->lv_watch;
2830     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2831     {
2832 	if (lw == lwrem)
2833 	{
2834 	    *lwp = lw->lw_next;
2835 	    break;
2836 	}
2837 	lwp = &lw->lw_next;
2838     }
2839 }
2840 
2841 /*
2842  * Just before removing an item from a list: advance watchers to the next
2843  * item.
2844  */
2845     static void
2846 list_fix_watch(l, item)
2847     list_T	*l;
2848     listitem_T	*item;
2849 {
2850     listwatch_T	*lw;
2851 
2852     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2853 	if (lw->lw_item == item)
2854 	    lw->lw_item = item->li_next;
2855 }
2856 
2857 /*
2858  * Evaluate the expression used in a ":for var in expr" command.
2859  * "arg" points to "var".
2860  * Set "*errp" to TRUE for an error, FALSE otherwise;
2861  * Return a pointer that holds the info.  Null when there is an error.
2862  */
2863     void *
2864 eval_for_line(arg, errp, nextcmdp, skip)
2865     char_u	*arg;
2866     int		*errp;
2867     char_u	**nextcmdp;
2868     int		skip;
2869 {
2870     forinfo_T	*fi;
2871     char_u	*expr;
2872     typval_T	tv;
2873     list_T	*l;
2874 
2875     *errp = TRUE;	/* default: there is an error */
2876 
2877     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2878     if (fi == NULL)
2879 	return NULL;
2880 
2881     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2882     if (expr == NULL)
2883 	return fi;
2884 
2885     expr = skipwhite(expr);
2886     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2887     {
2888 	EMSG(_("E690: Missing \"in\" after :for"));
2889 	return fi;
2890     }
2891 
2892     if (skip)
2893 	++emsg_skip;
2894     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2895     {
2896 	*errp = FALSE;
2897 	if (!skip)
2898 	{
2899 	    l = tv.vval.v_list;
2900 	    if (tv.v_type != VAR_LIST || l == NULL)
2901 	    {
2902 		EMSG(_(e_listreq));
2903 		clear_tv(&tv);
2904 	    }
2905 	    else
2906 	    {
2907 		/* No need to increment the refcount, it's already set for the
2908 		 * list being used in "tv". */
2909 		fi->fi_list = l;
2910 		list_add_watch(l, &fi->fi_lw);
2911 		fi->fi_lw.lw_item = l->lv_first;
2912 	    }
2913 	}
2914     }
2915     if (skip)
2916 	--emsg_skip;
2917 
2918     return fi;
2919 }
2920 
2921 /*
2922  * Use the first item in a ":for" list.  Advance to the next.
2923  * Assign the values to the variable (list).  "arg" points to the first one.
2924  * Return TRUE when a valid item was found, FALSE when at end of list or
2925  * something wrong.
2926  */
2927     int
2928 next_for_item(fi_void, arg)
2929     void	*fi_void;
2930     char_u	*arg;
2931 {
2932     forinfo_T    *fi = (forinfo_T *)fi_void;
2933     int		result;
2934     listitem_T	*item;
2935 
2936     item = fi->fi_lw.lw_item;
2937     if (item == NULL)
2938 	result = FALSE;
2939     else
2940     {
2941 	fi->fi_lw.lw_item = item->li_next;
2942 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2943 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2944     }
2945     return result;
2946 }
2947 
2948 /*
2949  * Free the structure used to store info used by ":for".
2950  */
2951     void
2952 free_for_info(fi_void)
2953     void *fi_void;
2954 {
2955     forinfo_T    *fi = (forinfo_T *)fi_void;
2956 
2957     if (fi != NULL && fi->fi_list != NULL)
2958     {
2959 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2960 	list_unref(fi->fi_list);
2961     }
2962     vim_free(fi);
2963 }
2964 
2965 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2966 
2967     void
2968 set_context_for_expression(xp, arg, cmdidx)
2969     expand_T	*xp;
2970     char_u	*arg;
2971     cmdidx_T	cmdidx;
2972 {
2973     int		got_eq = FALSE;
2974     int		c;
2975     char_u	*p;
2976 
2977     if (cmdidx == CMD_let)
2978     {
2979 	xp->xp_context = EXPAND_USER_VARS;
2980 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2981 	{
2982 	    /* ":let var1 var2 ...": find last space. */
2983 	    for (p = arg + STRLEN(arg); p >= arg; )
2984 	    {
2985 		xp->xp_pattern = p;
2986 		mb_ptr_back(arg, p);
2987 		if (vim_iswhite(*p))
2988 		    break;
2989 	    }
2990 	    return;
2991 	}
2992     }
2993     else
2994 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2995 							  : EXPAND_EXPRESSION;
2996     while ((xp->xp_pattern = vim_strpbrk(arg,
2997 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2998     {
2999 	c = *xp->xp_pattern;
3000 	if (c == '&')
3001 	{
3002 	    c = xp->xp_pattern[1];
3003 	    if (c == '&')
3004 	    {
3005 		++xp->xp_pattern;
3006 		xp->xp_context = cmdidx != CMD_let || got_eq
3007 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
3008 	    }
3009 	    else if (c != ' ')
3010 	    {
3011 		xp->xp_context = EXPAND_SETTINGS;
3012 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
3013 		    xp->xp_pattern += 2;
3014 
3015 	    }
3016 	}
3017 	else if (c == '$')
3018 	{
3019 	    /* environment variable */
3020 	    xp->xp_context = EXPAND_ENV_VARS;
3021 	}
3022 	else if (c == '=')
3023 	{
3024 	    got_eq = TRUE;
3025 	    xp->xp_context = EXPAND_EXPRESSION;
3026 	}
3027 	else if (c == '<'
3028 		&& xp->xp_context == EXPAND_FUNCTIONS
3029 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
3030 	{
3031 	    /* Function name can start with "<SNR>" */
3032 	    break;
3033 	}
3034 	else if (cmdidx != CMD_let || got_eq)
3035 	{
3036 	    if (c == '"')	    /* string */
3037 	    {
3038 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
3039 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
3040 			++xp->xp_pattern;
3041 		xp->xp_context = EXPAND_NOTHING;
3042 	    }
3043 	    else if (c == '\'')	    /* literal string */
3044 	    {
3045 		/* Trick: '' is like stopping and starting a literal string. */
3046 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
3047 		    /* skip */ ;
3048 		xp->xp_context = EXPAND_NOTHING;
3049 	    }
3050 	    else if (c == '|')
3051 	    {
3052 		if (xp->xp_pattern[1] == '|')
3053 		{
3054 		    ++xp->xp_pattern;
3055 		    xp->xp_context = EXPAND_EXPRESSION;
3056 		}
3057 		else
3058 		    xp->xp_context = EXPAND_COMMANDS;
3059 	    }
3060 	    else
3061 		xp->xp_context = EXPAND_EXPRESSION;
3062 	}
3063 	else
3064 	    /* Doesn't look like something valid, expand as an expression
3065 	     * anyway. */
3066 	    xp->xp_context = EXPAND_EXPRESSION;
3067 	arg = xp->xp_pattern;
3068 	if (*arg != NUL)
3069 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
3070 		/* skip */ ;
3071     }
3072     xp->xp_pattern = arg;
3073 }
3074 
3075 #endif /* FEAT_CMDL_COMPL */
3076 
3077 /*
3078  * ":1,25call func(arg1, arg2)"	function call.
3079  */
3080     void
3081 ex_call(eap)
3082     exarg_T	*eap;
3083 {
3084     char_u	*arg = eap->arg;
3085     char_u	*startarg;
3086     char_u	*name;
3087     char_u	*tofree;
3088     int		len;
3089     typval_T	rettv;
3090     linenr_T	lnum;
3091     int		doesrange;
3092     int		failed = FALSE;
3093     funcdict_T	fudi;
3094 
3095     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3096     vim_free(fudi.fd_newkey);
3097     if (tofree == NULL)
3098 	return;
3099 
3100     /* Increase refcount on dictionary, it could get deleted when evaluating
3101      * the arguments. */
3102     if (fudi.fd_dict != NULL)
3103 	++fudi.fd_dict->dv_refcount;
3104 
3105     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3106     len = STRLEN(tofree);
3107     name = deref_func_name(tofree, &len);
3108 
3109     /* Skip white space to allow ":call func ()".  Not good, but required for
3110      * backward compatibility. */
3111     startarg = skipwhite(arg);
3112     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3113 
3114     if (*startarg != '(')
3115     {
3116 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3117 	goto end;
3118     }
3119 
3120     /*
3121      * When skipping, evaluate the function once, to find the end of the
3122      * arguments.
3123      * When the function takes a range, this is discovered after the first
3124      * call, and the loop is broken.
3125      */
3126     if (eap->skip)
3127     {
3128 	++emsg_skip;
3129 	lnum = eap->line2;	/* do it once, also with an invalid range */
3130     }
3131     else
3132 	lnum = eap->line1;
3133     for ( ; lnum <= eap->line2; ++lnum)
3134     {
3135 	if (!eap->skip && eap->addr_count > 0)
3136 	{
3137 	    curwin->w_cursor.lnum = lnum;
3138 	    curwin->w_cursor.col = 0;
3139 	}
3140 	arg = startarg;
3141 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3142 		    eap->line1, eap->line2, &doesrange,
3143 					    !eap->skip, fudi.fd_dict) == FAIL)
3144 	{
3145 	    failed = TRUE;
3146 	    break;
3147 	}
3148 	clear_tv(&rettv);
3149 	if (doesrange || eap->skip)
3150 	    break;
3151 	/* Stop when immediately aborting on error, or when an interrupt
3152 	 * occurred or an exception was thrown but not caught.
3153 	 * get_func_tv() returned OK, so that the check for trailing
3154 	 * characters below is executed. */
3155 	if (aborting())
3156 	    break;
3157     }
3158     if (eap->skip)
3159 	--emsg_skip;
3160 
3161     if (!failed)
3162     {
3163 	/* Check for trailing illegal characters and a following command. */
3164 	if (!ends_excmd(*arg))
3165 	{
3166 	    emsg_severe = TRUE;
3167 	    EMSG(_(e_trailing));
3168 	}
3169 	else
3170 	    eap->nextcmd = check_nextcmd(arg);
3171     }
3172 
3173 end:
3174     dict_unref(fudi.fd_dict);
3175     vim_free(tofree);
3176 }
3177 
3178 /*
3179  * ":unlet[!] var1 ... " command.
3180  */
3181     void
3182 ex_unlet(eap)
3183     exarg_T	*eap;
3184 {
3185     ex_unletlock(eap, eap->arg, 0);
3186 }
3187 
3188 /*
3189  * ":lockvar" and ":unlockvar" commands
3190  */
3191     void
3192 ex_lockvar(eap)
3193     exarg_T	*eap;
3194 {
3195     char_u	*arg = eap->arg;
3196     int		deep = 2;
3197 
3198     if (eap->forceit)
3199 	deep = -1;
3200     else if (vim_isdigit(*arg))
3201     {
3202 	deep = getdigits(&arg);
3203 	arg = skipwhite(arg);
3204     }
3205 
3206     ex_unletlock(eap, arg, deep);
3207 }
3208 
3209 /*
3210  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3211  */
3212     static void
3213 ex_unletlock(eap, argstart, deep)
3214     exarg_T	*eap;
3215     char_u	*argstart;
3216     int		deep;
3217 {
3218     char_u	*arg = argstart;
3219     char_u	*name_end;
3220     int		error = FALSE;
3221     lval_T	lv;
3222 
3223     do
3224     {
3225 	/* Parse the name and find the end. */
3226 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3227 							     FNE_CHECK_START);
3228 	if (lv.ll_name == NULL)
3229 	    error = TRUE;	    /* error but continue parsing */
3230 	if (name_end == NULL || (!vim_iswhite(*name_end)
3231 						   && !ends_excmd(*name_end)))
3232 	{
3233 	    if (name_end != NULL)
3234 	    {
3235 		emsg_severe = TRUE;
3236 		EMSG(_(e_trailing));
3237 	    }
3238 	    if (!(eap->skip || error))
3239 		clear_lval(&lv);
3240 	    break;
3241 	}
3242 
3243 	if (!error && !eap->skip)
3244 	{
3245 	    if (eap->cmdidx == CMD_unlet)
3246 	    {
3247 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3248 		    error = TRUE;
3249 	    }
3250 	    else
3251 	    {
3252 		if (do_lock_var(&lv, name_end, deep,
3253 					  eap->cmdidx == CMD_lockvar) == FAIL)
3254 		    error = TRUE;
3255 	    }
3256 	}
3257 
3258 	if (!eap->skip)
3259 	    clear_lval(&lv);
3260 
3261 	arg = skipwhite(name_end);
3262     } while (!ends_excmd(*arg));
3263 
3264     eap->nextcmd = check_nextcmd(arg);
3265 }
3266 
3267     static int
3268 do_unlet_var(lp, name_end, forceit)
3269     lval_T	*lp;
3270     char_u	*name_end;
3271     int		forceit;
3272 {
3273     int		ret = OK;
3274     int		cc;
3275 
3276     if (lp->ll_tv == NULL)
3277     {
3278 	cc = *name_end;
3279 	*name_end = NUL;
3280 
3281 	/* Normal name or expanded name. */
3282 	if (check_changedtick(lp->ll_name))
3283 	    ret = FAIL;
3284 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3285 	    ret = FAIL;
3286 	*name_end = cc;
3287     }
3288     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3289 	return FAIL;
3290     else if (lp->ll_range)
3291     {
3292 	listitem_T    *li;
3293 
3294 	/* Delete a range of List items. */
3295 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3296 	{
3297 	    li = lp->ll_li->li_next;
3298 	    listitem_remove(lp->ll_list, lp->ll_li);
3299 	    lp->ll_li = li;
3300 	    ++lp->ll_n1;
3301 	}
3302     }
3303     else
3304     {
3305 	if (lp->ll_list != NULL)
3306 	    /* unlet a List item. */
3307 	    listitem_remove(lp->ll_list, lp->ll_li);
3308 	else
3309 	    /* unlet a Dictionary item. */
3310 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3311     }
3312 
3313     return ret;
3314 }
3315 
3316 /*
3317  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3318  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3319  */
3320     int
3321 do_unlet(name, forceit)
3322     char_u	*name;
3323     int		forceit;
3324 {
3325     hashtab_T	*ht;
3326     hashitem_T	*hi;
3327     char_u	*varname;
3328 
3329     ht = find_var_ht(name, &varname);
3330     if (ht != NULL && *varname != NUL)
3331     {
3332 	hi = hash_find(ht, varname);
3333 	if (!HASHITEM_EMPTY(hi))
3334 	{
3335 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3336 		return FAIL;
3337 	    delete_var(ht, hi);
3338 	    return OK;
3339 	}
3340     }
3341     if (forceit)
3342 	return OK;
3343     EMSG2(_("E108: No such variable: \"%s\""), name);
3344     return FAIL;
3345 }
3346 
3347 /*
3348  * Lock or unlock variable indicated by "lp".
3349  * "deep" is the levels to go (-1 for unlimited);
3350  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3351  */
3352     static int
3353 do_lock_var(lp, name_end, deep, lock)
3354     lval_T	*lp;
3355     char_u	*name_end;
3356     int		deep;
3357     int		lock;
3358 {
3359     int		ret = OK;
3360     int		cc;
3361     dictitem_T	*di;
3362 
3363     if (deep == 0)	/* nothing to do */
3364 	return OK;
3365 
3366     if (lp->ll_tv == NULL)
3367     {
3368 	cc = *name_end;
3369 	*name_end = NUL;
3370 
3371 	/* Normal name or expanded name. */
3372 	if (check_changedtick(lp->ll_name))
3373 	    ret = FAIL;
3374 	else
3375 	{
3376 	    di = find_var(lp->ll_name, NULL);
3377 	    if (di == NULL)
3378 		ret = FAIL;
3379 	    else
3380 	    {
3381 		if (lock)
3382 		    di->di_flags |= DI_FLAGS_LOCK;
3383 		else
3384 		    di->di_flags &= ~DI_FLAGS_LOCK;
3385 		item_lock(&di->di_tv, deep, lock);
3386 	    }
3387 	}
3388 	*name_end = cc;
3389     }
3390     else if (lp->ll_range)
3391     {
3392 	listitem_T    *li = lp->ll_li;
3393 
3394 	/* (un)lock a range of List items. */
3395 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3396 	{
3397 	    item_lock(&li->li_tv, deep, lock);
3398 	    li = li->li_next;
3399 	    ++lp->ll_n1;
3400 	}
3401     }
3402     else if (lp->ll_list != NULL)
3403 	/* (un)lock a List item. */
3404 	item_lock(&lp->ll_li->li_tv, deep, lock);
3405     else
3406 	/* un(lock) a Dictionary item. */
3407 	item_lock(&lp->ll_di->di_tv, deep, lock);
3408 
3409     return ret;
3410 }
3411 
3412 /*
3413  * Lock or unlock an item.  "deep" is nr of levels to go.
3414  */
3415     static void
3416 item_lock(tv, deep, lock)
3417     typval_T	*tv;
3418     int		deep;
3419     int		lock;
3420 {
3421     static int	recurse = 0;
3422     list_T	*l;
3423     listitem_T	*li;
3424     dict_T	*d;
3425     hashitem_T	*hi;
3426     int		todo;
3427 
3428     if (recurse >= DICT_MAXNEST)
3429     {
3430 	EMSG(_("E743: variable nested too deep for (un)lock"));
3431 	return;
3432     }
3433     if (deep == 0)
3434 	return;
3435     ++recurse;
3436 
3437     /* lock/unlock the item itself */
3438     if (lock)
3439 	tv->v_lock |= VAR_LOCKED;
3440     else
3441 	tv->v_lock &= ~VAR_LOCKED;
3442 
3443     switch (tv->v_type)
3444     {
3445 	case VAR_LIST:
3446 	    if ((l = tv->vval.v_list) != NULL)
3447 	    {
3448 		if (lock)
3449 		    l->lv_lock |= VAR_LOCKED;
3450 		else
3451 		    l->lv_lock &= ~VAR_LOCKED;
3452 		if (deep < 0 || deep > 1)
3453 		    /* recursive: lock/unlock the items the List contains */
3454 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3455 			item_lock(&li->li_tv, deep - 1, lock);
3456 	    }
3457 	    break;
3458 	case VAR_DICT:
3459 	    if ((d = tv->vval.v_dict) != NULL)
3460 	    {
3461 		if (lock)
3462 		    d->dv_lock |= VAR_LOCKED;
3463 		else
3464 		    d->dv_lock &= ~VAR_LOCKED;
3465 		if (deep < 0 || deep > 1)
3466 		{
3467 		    /* recursive: lock/unlock the items the List contains */
3468 		    todo = d->dv_hashtab.ht_used;
3469 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3470 		    {
3471 			if (!HASHITEM_EMPTY(hi))
3472 			{
3473 			    --todo;
3474 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3475 			}
3476 		    }
3477 		}
3478 	    }
3479     }
3480     --recurse;
3481 }
3482 
3483 /*
3484  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3485  * it refers to a List or Dictionary that is locked.
3486  */
3487     static int
3488 tv_islocked(tv)
3489     typval_T	*tv;
3490 {
3491     return (tv->v_lock & VAR_LOCKED)
3492 	|| (tv->v_type == VAR_LIST
3493 		&& tv->vval.v_list != NULL
3494 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3495 	|| (tv->v_type == VAR_DICT
3496 		&& tv->vval.v_dict != NULL
3497 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3498 }
3499 
3500 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3501 /*
3502  * Delete all "menutrans_" variables.
3503  */
3504     void
3505 del_menutrans_vars()
3506 {
3507     hashitem_T	*hi;
3508     int		todo;
3509 
3510     hash_lock(&globvarht);
3511     todo = globvarht.ht_used;
3512     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3513     {
3514 	if (!HASHITEM_EMPTY(hi))
3515 	{
3516 	    --todo;
3517 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3518 		delete_var(&globvarht, hi);
3519 	}
3520     }
3521     hash_unlock(&globvarht);
3522 }
3523 #endif
3524 
3525 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3526 
3527 /*
3528  * Local string buffer for the next two functions to store a variable name
3529  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3530  * get_user_var_name().
3531  */
3532 
3533 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3534 
3535 static char_u	*varnamebuf = NULL;
3536 static int	varnamebuflen = 0;
3537 
3538 /*
3539  * Function to concatenate a prefix and a variable name.
3540  */
3541     static char_u *
3542 cat_prefix_varname(prefix, name)
3543     int		prefix;
3544     char_u	*name;
3545 {
3546     int		len;
3547 
3548     len = (int)STRLEN(name) + 3;
3549     if (len > varnamebuflen)
3550     {
3551 	vim_free(varnamebuf);
3552 	len += 10;			/* some additional space */
3553 	varnamebuf = alloc(len);
3554 	if (varnamebuf == NULL)
3555 	{
3556 	    varnamebuflen = 0;
3557 	    return NULL;
3558 	}
3559 	varnamebuflen = len;
3560     }
3561     *varnamebuf = prefix;
3562     varnamebuf[1] = ':';
3563     STRCPY(varnamebuf + 2, name);
3564     return varnamebuf;
3565 }
3566 
3567 /*
3568  * Function given to ExpandGeneric() to obtain the list of user defined
3569  * (global/buffer/window/built-in) variable names.
3570  */
3571 /*ARGSUSED*/
3572     char_u *
3573 get_user_var_name(xp, idx)
3574     expand_T	*xp;
3575     int		idx;
3576 {
3577     static long_u	gdone;
3578     static long_u	bdone;
3579     static long_u	wdone;
3580     static int		vidx;
3581     static hashitem_T	*hi;
3582     hashtab_T		*ht;
3583 
3584     if (idx == 0)
3585 	gdone = bdone = wdone = vidx = 0;
3586 
3587     /* Global variables */
3588     if (gdone < globvarht.ht_used)
3589     {
3590 	if (gdone++ == 0)
3591 	    hi = globvarht.ht_array;
3592 	else
3593 	    ++hi;
3594 	while (HASHITEM_EMPTY(hi))
3595 	    ++hi;
3596 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3597 	    return cat_prefix_varname('g', hi->hi_key);
3598 	return hi->hi_key;
3599     }
3600 
3601     /* b: variables */
3602     ht = &curbuf->b_vars.dv_hashtab;
3603     if (bdone < ht->ht_used)
3604     {
3605 	if (bdone++ == 0)
3606 	    hi = ht->ht_array;
3607 	else
3608 	    ++hi;
3609 	while (HASHITEM_EMPTY(hi))
3610 	    ++hi;
3611 	return cat_prefix_varname('b', hi->hi_key);
3612     }
3613     if (bdone == ht->ht_used)
3614     {
3615 	++bdone;
3616 	return (char_u *)"b:changedtick";
3617     }
3618 
3619     /* w: variables */
3620     ht = &curwin->w_vars.dv_hashtab;
3621     if (wdone < ht->ht_used)
3622     {
3623 	if (wdone++ == 0)
3624 	    hi = ht->ht_array;
3625 	else
3626 	    ++hi;
3627 	while (HASHITEM_EMPTY(hi))
3628 	    ++hi;
3629 	return cat_prefix_varname('w', hi->hi_key);
3630     }
3631 
3632     /* v: variables */
3633     if (vidx < VV_LEN)
3634 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3635 
3636     vim_free(varnamebuf);
3637     varnamebuf = NULL;
3638     varnamebuflen = 0;
3639     return NULL;
3640 }
3641 
3642 #endif /* FEAT_CMDL_COMPL */
3643 
3644 /*
3645  * types for expressions.
3646  */
3647 typedef enum
3648 {
3649     TYPE_UNKNOWN = 0
3650     , TYPE_EQUAL	/* == */
3651     , TYPE_NEQUAL	/* != */
3652     , TYPE_GREATER	/* >  */
3653     , TYPE_GEQUAL	/* >= */
3654     , TYPE_SMALLER	/* <  */
3655     , TYPE_SEQUAL	/* <= */
3656     , TYPE_MATCH	/* =~ */
3657     , TYPE_NOMATCH	/* !~ */
3658 } exptype_T;
3659 
3660 /*
3661  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3662  * executed.  The function may return OK, but the rettv will be of type
3663  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3664  */
3665 
3666 /*
3667  * Handle zero level expression.
3668  * This calls eval1() and handles error message and nextcmd.
3669  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3670  * Note: "rettv.v_lock" is not set.
3671  * Return OK or FAIL.
3672  */
3673     static int
3674 eval0(arg, rettv, nextcmd, evaluate)
3675     char_u	*arg;
3676     typval_T	*rettv;
3677     char_u	**nextcmd;
3678     int		evaluate;
3679 {
3680     int		ret;
3681     char_u	*p;
3682 
3683     p = skipwhite(arg);
3684     ret = eval1(&p, rettv, evaluate);
3685     if (ret == FAIL || !ends_excmd(*p))
3686     {
3687 	if (ret != FAIL)
3688 	    clear_tv(rettv);
3689 	/*
3690 	 * Report the invalid expression unless the expression evaluation has
3691 	 * been cancelled due to an aborting error, an interrupt, or an
3692 	 * exception.
3693 	 */
3694 	if (!aborting())
3695 	    EMSG2(_(e_invexpr2), arg);
3696 	ret = FAIL;
3697     }
3698     if (nextcmd != NULL)
3699 	*nextcmd = check_nextcmd(p);
3700 
3701     return ret;
3702 }
3703 
3704 /*
3705  * Handle top level expression:
3706  *	expr1 ? expr0 : expr0
3707  *
3708  * "arg" must point to the first non-white of the expression.
3709  * "arg" is advanced to the next non-white after the recognized expression.
3710  *
3711  * Note: "rettv.v_lock" is not set.
3712  *
3713  * Return OK or FAIL.
3714  */
3715     static int
3716 eval1(arg, rettv, evaluate)
3717     char_u	**arg;
3718     typval_T	*rettv;
3719     int		evaluate;
3720 {
3721     int		result;
3722     typval_T	var2;
3723 
3724     /*
3725      * Get the first variable.
3726      */
3727     if (eval2(arg, rettv, evaluate) == FAIL)
3728 	return FAIL;
3729 
3730     if ((*arg)[0] == '?')
3731     {
3732 	result = FALSE;
3733 	if (evaluate)
3734 	{
3735 	    int		error = FALSE;
3736 
3737 	    if (get_tv_number_chk(rettv, &error) != 0)
3738 		result = TRUE;
3739 	    clear_tv(rettv);
3740 	    if (error)
3741 		return FAIL;
3742 	}
3743 
3744 	/*
3745 	 * Get the second variable.
3746 	 */
3747 	*arg = skipwhite(*arg + 1);
3748 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3749 	    return FAIL;
3750 
3751 	/*
3752 	 * Check for the ":".
3753 	 */
3754 	if ((*arg)[0] != ':')
3755 	{
3756 	    EMSG(_("E109: Missing ':' after '?'"));
3757 	    if (evaluate && result)
3758 		clear_tv(rettv);
3759 	    return FAIL;
3760 	}
3761 
3762 	/*
3763 	 * Get the third variable.
3764 	 */
3765 	*arg = skipwhite(*arg + 1);
3766 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3767 	{
3768 	    if (evaluate && result)
3769 		clear_tv(rettv);
3770 	    return FAIL;
3771 	}
3772 	if (evaluate && !result)
3773 	    *rettv = var2;
3774     }
3775 
3776     return OK;
3777 }
3778 
3779 /*
3780  * Handle first level expression:
3781  *	expr2 || expr2 || expr2	    logical OR
3782  *
3783  * "arg" must point to the first non-white of the expression.
3784  * "arg" is advanced to the next non-white after the recognized expression.
3785  *
3786  * Return OK or FAIL.
3787  */
3788     static int
3789 eval2(arg, rettv, evaluate)
3790     char_u	**arg;
3791     typval_T	*rettv;
3792     int		evaluate;
3793 {
3794     typval_T	var2;
3795     long	result;
3796     int		first;
3797     int		error = FALSE;
3798 
3799     /*
3800      * Get the first variable.
3801      */
3802     if (eval3(arg, rettv, evaluate) == FAIL)
3803 	return FAIL;
3804 
3805     /*
3806      * Repeat until there is no following "||".
3807      */
3808     first = TRUE;
3809     result = FALSE;
3810     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3811     {
3812 	if (evaluate && first)
3813 	{
3814 	    if (get_tv_number_chk(rettv, &error) != 0)
3815 		result = TRUE;
3816 	    clear_tv(rettv);
3817 	    if (error)
3818 		return FAIL;
3819 	    first = FALSE;
3820 	}
3821 
3822 	/*
3823 	 * Get the second variable.
3824 	 */
3825 	*arg = skipwhite(*arg + 2);
3826 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3827 	    return FAIL;
3828 
3829 	/*
3830 	 * Compute the result.
3831 	 */
3832 	if (evaluate && !result)
3833 	{
3834 	    if (get_tv_number_chk(&var2, &error) != 0)
3835 		result = TRUE;
3836 	    clear_tv(&var2);
3837 	    if (error)
3838 		return FAIL;
3839 	}
3840 	if (evaluate)
3841 	{
3842 	    rettv->v_type = VAR_NUMBER;
3843 	    rettv->vval.v_number = result;
3844 	}
3845     }
3846 
3847     return OK;
3848 }
3849 
3850 /*
3851  * Handle second level expression:
3852  *	expr3 && expr3 && expr3	    logical AND
3853  *
3854  * "arg" must point to the first non-white of the expression.
3855  * "arg" is advanced to the next non-white after the recognized expression.
3856  *
3857  * Return OK or FAIL.
3858  */
3859     static int
3860 eval3(arg, rettv, evaluate)
3861     char_u	**arg;
3862     typval_T	*rettv;
3863     int		evaluate;
3864 {
3865     typval_T	var2;
3866     long	result;
3867     int		first;
3868     int		error = FALSE;
3869 
3870     /*
3871      * Get the first variable.
3872      */
3873     if (eval4(arg, rettv, evaluate) == FAIL)
3874 	return FAIL;
3875 
3876     /*
3877      * Repeat until there is no following "&&".
3878      */
3879     first = TRUE;
3880     result = TRUE;
3881     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3882     {
3883 	if (evaluate && first)
3884 	{
3885 	    if (get_tv_number_chk(rettv, &error) == 0)
3886 		result = FALSE;
3887 	    clear_tv(rettv);
3888 	    if (error)
3889 		return FAIL;
3890 	    first = FALSE;
3891 	}
3892 
3893 	/*
3894 	 * Get the second variable.
3895 	 */
3896 	*arg = skipwhite(*arg + 2);
3897 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3898 	    return FAIL;
3899 
3900 	/*
3901 	 * Compute the result.
3902 	 */
3903 	if (evaluate && result)
3904 	{
3905 	    if (get_tv_number_chk(&var2, &error) == 0)
3906 		result = FALSE;
3907 	    clear_tv(&var2);
3908 	    if (error)
3909 		return FAIL;
3910 	}
3911 	if (evaluate)
3912 	{
3913 	    rettv->v_type = VAR_NUMBER;
3914 	    rettv->vval.v_number = result;
3915 	}
3916     }
3917 
3918     return OK;
3919 }
3920 
3921 /*
3922  * Handle third level expression:
3923  *	var1 == var2
3924  *	var1 =~ var2
3925  *	var1 != var2
3926  *	var1 !~ var2
3927  *	var1 > var2
3928  *	var1 >= var2
3929  *	var1 < var2
3930  *	var1 <= var2
3931  *	var1 is var2
3932  *	var1 isnot var2
3933  *
3934  * "arg" must point to the first non-white of the expression.
3935  * "arg" is advanced to the next non-white after the recognized expression.
3936  *
3937  * Return OK or FAIL.
3938  */
3939     static int
3940 eval4(arg, rettv, evaluate)
3941     char_u	**arg;
3942     typval_T	*rettv;
3943     int		evaluate;
3944 {
3945     typval_T	var2;
3946     char_u	*p;
3947     int		i;
3948     exptype_T	type = TYPE_UNKNOWN;
3949     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3950     int		len = 2;
3951     long	n1, n2;
3952     char_u	*s1, *s2;
3953     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3954     regmatch_T	regmatch;
3955     int		ic;
3956     char_u	*save_cpo;
3957 
3958     /*
3959      * Get the first variable.
3960      */
3961     if (eval5(arg, rettv, evaluate) == FAIL)
3962 	return FAIL;
3963 
3964     p = *arg;
3965     switch (p[0])
3966     {
3967 	case '=':   if (p[1] == '=')
3968 			type = TYPE_EQUAL;
3969 		    else if (p[1] == '~')
3970 			type = TYPE_MATCH;
3971 		    break;
3972 	case '!':   if (p[1] == '=')
3973 			type = TYPE_NEQUAL;
3974 		    else if (p[1] == '~')
3975 			type = TYPE_NOMATCH;
3976 		    break;
3977 	case '>':   if (p[1] != '=')
3978 		    {
3979 			type = TYPE_GREATER;
3980 			len = 1;
3981 		    }
3982 		    else
3983 			type = TYPE_GEQUAL;
3984 		    break;
3985 	case '<':   if (p[1] != '=')
3986 		    {
3987 			type = TYPE_SMALLER;
3988 			len = 1;
3989 		    }
3990 		    else
3991 			type = TYPE_SEQUAL;
3992 		    break;
3993 	case 'i':   if (p[1] == 's')
3994 		    {
3995 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3996 			    len = 5;
3997 			if (!vim_isIDc(p[len]))
3998 			{
3999 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
4000 			    type_is = TRUE;
4001 			}
4002 		    }
4003 		    break;
4004     }
4005 
4006     /*
4007      * If there is a comparitive operator, use it.
4008      */
4009     if (type != TYPE_UNKNOWN)
4010     {
4011 	/* extra question mark appended: ignore case */
4012 	if (p[len] == '?')
4013 	{
4014 	    ic = TRUE;
4015 	    ++len;
4016 	}
4017 	/* extra '#' appended: match case */
4018 	else if (p[len] == '#')
4019 	{
4020 	    ic = FALSE;
4021 	    ++len;
4022 	}
4023 	/* nothing appened: use 'ignorecase' */
4024 	else
4025 	    ic = p_ic;
4026 
4027 	/*
4028 	 * Get the second variable.
4029 	 */
4030 	*arg = skipwhite(p + len);
4031 	if (eval5(arg, &var2, evaluate) == FAIL)
4032 	{
4033 	    clear_tv(rettv);
4034 	    return FAIL;
4035 	}
4036 
4037 	if (evaluate)
4038 	{
4039 	    if (type_is && rettv->v_type != var2.v_type)
4040 	    {
4041 		/* For "is" a different type always means FALSE, for "notis"
4042 		 * it means TRUE. */
4043 		n1 = (type == TYPE_NEQUAL);
4044 	    }
4045 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
4046 	    {
4047 		if (type_is)
4048 		{
4049 		    n1 = (rettv->v_type == var2.v_type
4050 				   && rettv->vval.v_list == var2.vval.v_list);
4051 		    if (type == TYPE_NEQUAL)
4052 			n1 = !n1;
4053 		}
4054 		else if (rettv->v_type != var2.v_type
4055 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4056 		{
4057 		    if (rettv->v_type != var2.v_type)
4058 			EMSG(_("E691: Can only compare List with List"));
4059 		    else
4060 			EMSG(_("E692: Invalid operation for Lists"));
4061 		    clear_tv(rettv);
4062 		    clear_tv(&var2);
4063 		    return FAIL;
4064 		}
4065 		else
4066 		{
4067 		    /* Compare two Lists for being equal or unequal. */
4068 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
4069 		    if (type == TYPE_NEQUAL)
4070 			n1 = !n1;
4071 		}
4072 	    }
4073 
4074 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
4075 	    {
4076 		if (type_is)
4077 		{
4078 		    n1 = (rettv->v_type == var2.v_type
4079 				   && rettv->vval.v_dict == var2.vval.v_dict);
4080 		    if (type == TYPE_NEQUAL)
4081 			n1 = !n1;
4082 		}
4083 		else if (rettv->v_type != var2.v_type
4084 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4085 		{
4086 		    if (rettv->v_type != var2.v_type)
4087 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4088 		    else
4089 			EMSG(_("E736: Invalid operation for Dictionary"));
4090 		    clear_tv(rettv);
4091 		    clear_tv(&var2);
4092 		    return FAIL;
4093 		}
4094 		else
4095 		{
4096 		    /* Compare two Dictionaries for being equal or unequal. */
4097 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4098 		    if (type == TYPE_NEQUAL)
4099 			n1 = !n1;
4100 		}
4101 	    }
4102 
4103 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4104 	    {
4105 		if (rettv->v_type != var2.v_type
4106 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4107 		{
4108 		    if (rettv->v_type != var2.v_type)
4109 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4110 		    else
4111 			EMSG(_("E694: Invalid operation for Funcrefs"));
4112 		    clear_tv(rettv);
4113 		    clear_tv(&var2);
4114 		    return FAIL;
4115 		}
4116 		else
4117 		{
4118 		    /* Compare two Funcrefs for being equal or unequal. */
4119 		    if (rettv->vval.v_string == NULL
4120 						|| var2.vval.v_string == NULL)
4121 			n1 = FALSE;
4122 		    else
4123 			n1 = STRCMP(rettv->vval.v_string,
4124 						     var2.vval.v_string) == 0;
4125 		    if (type == TYPE_NEQUAL)
4126 			n1 = !n1;
4127 		}
4128 	    }
4129 
4130 	    /*
4131 	     * If one of the two variables is a number, compare as a number.
4132 	     * When using "=~" or "!~", always compare as string.
4133 	     */
4134 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4135 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4136 	    {
4137 		n1 = get_tv_number(rettv);
4138 		n2 = get_tv_number(&var2);
4139 		switch (type)
4140 		{
4141 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4142 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4143 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4144 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4145 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4146 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4147 		    case TYPE_UNKNOWN:
4148 		    case TYPE_MATCH:
4149 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4150 		}
4151 	    }
4152 	    else
4153 	    {
4154 		s1 = get_tv_string_buf(rettv, buf1);
4155 		s2 = get_tv_string_buf(&var2, buf2);
4156 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4157 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4158 		else
4159 		    i = 0;
4160 		n1 = FALSE;
4161 		switch (type)
4162 		{
4163 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4164 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4165 		    case TYPE_GREATER:  n1 = (i > 0); break;
4166 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4167 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4168 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4169 
4170 		    case TYPE_MATCH:
4171 		    case TYPE_NOMATCH:
4172 			    /* avoid 'l' flag in 'cpoptions' */
4173 			    save_cpo = p_cpo;
4174 			    p_cpo = (char_u *)"";
4175 			    regmatch.regprog = vim_regcomp(s2,
4176 							RE_MAGIC + RE_STRING);
4177 			    regmatch.rm_ic = ic;
4178 			    if (regmatch.regprog != NULL)
4179 			    {
4180 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4181 				vim_free(regmatch.regprog);
4182 				if (type == TYPE_NOMATCH)
4183 				    n1 = !n1;
4184 			    }
4185 			    p_cpo = save_cpo;
4186 			    break;
4187 
4188 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4189 		}
4190 	    }
4191 	    clear_tv(rettv);
4192 	    clear_tv(&var2);
4193 	    rettv->v_type = VAR_NUMBER;
4194 	    rettv->vval.v_number = n1;
4195 	}
4196     }
4197 
4198     return OK;
4199 }
4200 
4201 /*
4202  * Handle fourth level expression:
4203  *	+	number addition
4204  *	-	number subtraction
4205  *	.	string concatenation
4206  *
4207  * "arg" must point to the first non-white of the expression.
4208  * "arg" is advanced to the next non-white after the recognized expression.
4209  *
4210  * Return OK or FAIL.
4211  */
4212     static int
4213 eval5(arg, rettv, evaluate)
4214     char_u	**arg;
4215     typval_T	*rettv;
4216     int		evaluate;
4217 {
4218     typval_T	var2;
4219     typval_T	var3;
4220     int		op;
4221     long	n1, n2;
4222     char_u	*s1, *s2;
4223     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4224     char_u	*p;
4225 
4226     /*
4227      * Get the first variable.
4228      */
4229     if (eval6(arg, rettv, evaluate) == FAIL)
4230 	return FAIL;
4231 
4232     /*
4233      * Repeat computing, until no '+', '-' or '.' is following.
4234      */
4235     for (;;)
4236     {
4237 	op = **arg;
4238 	if (op != '+' && op != '-' && op != '.')
4239 	    break;
4240 
4241 	if (op != '+' || rettv->v_type != VAR_LIST)
4242 	{
4243 	    /* For "list + ...", an illegal use of the first operand as
4244 	     * a number cannot be determined before evaluating the 2nd
4245 	     * operand: if this is also a list, all is ok.
4246 	     * For "something . ...", "something - ..." or "non-list + ...",
4247 	     * we know that the first operand needs to be a string or number
4248 	     * without evaluating the 2nd operand.  So check before to avoid
4249 	     * side effects after an error. */
4250 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4251 	    {
4252 		clear_tv(rettv);
4253 		return FAIL;
4254 	    }
4255 	}
4256 
4257 	/*
4258 	 * Get the second variable.
4259 	 */
4260 	*arg = skipwhite(*arg + 1);
4261 	if (eval6(arg, &var2, evaluate) == FAIL)
4262 	{
4263 	    clear_tv(rettv);
4264 	    return FAIL;
4265 	}
4266 
4267 	if (evaluate)
4268 	{
4269 	    /*
4270 	     * Compute the result.
4271 	     */
4272 	    if (op == '.')
4273 	    {
4274 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4275 		s2 = get_tv_string_buf_chk(&var2, buf2);
4276 		if (s2 == NULL)		/* type error ? */
4277 		{
4278 		    clear_tv(rettv);
4279 		    clear_tv(&var2);
4280 		    return FAIL;
4281 		}
4282 		p = concat_str(s1, s2);
4283 		clear_tv(rettv);
4284 		rettv->v_type = VAR_STRING;
4285 		rettv->vval.v_string = p;
4286 	    }
4287 	    else if (op == '+' && rettv->v_type == VAR_LIST
4288 						   && var2.v_type == VAR_LIST)
4289 	    {
4290 		/* concatenate Lists */
4291 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4292 							       &var3) == FAIL)
4293 		{
4294 		    clear_tv(rettv);
4295 		    clear_tv(&var2);
4296 		    return FAIL;
4297 		}
4298 		clear_tv(rettv);
4299 		*rettv = var3;
4300 	    }
4301 	    else
4302 	    {
4303 		int	    error = FALSE;
4304 
4305 		n1 = get_tv_number_chk(rettv, &error);
4306 		if (error)
4307 		{
4308 		    /* This can only happen for "list + non-list".
4309 		     * For "non-list + ..." or "something - ...", we returned
4310 		     * before evaluating the 2nd operand. */
4311 		    clear_tv(rettv);
4312 		    return FAIL;
4313 		}
4314 		n2 = get_tv_number_chk(&var2, &error);
4315 		if (error)
4316 		{
4317 		    clear_tv(rettv);
4318 		    clear_tv(&var2);
4319 		    return FAIL;
4320 		}
4321 		clear_tv(rettv);
4322 		if (op == '+')
4323 		    n1 = n1 + n2;
4324 		else
4325 		    n1 = n1 - n2;
4326 		rettv->v_type = VAR_NUMBER;
4327 		rettv->vval.v_number = n1;
4328 	    }
4329 	    clear_tv(&var2);
4330 	}
4331     }
4332     return OK;
4333 }
4334 
4335 /*
4336  * Handle fifth level expression:
4337  *	*	number multiplication
4338  *	/	number division
4339  *	%	number modulo
4340  *
4341  * "arg" must point to the first non-white of the expression.
4342  * "arg" is advanced to the next non-white after the recognized expression.
4343  *
4344  * Return OK or FAIL.
4345  */
4346     static int
4347 eval6(arg, rettv, evaluate)
4348     char_u	**arg;
4349     typval_T	*rettv;
4350     int		evaluate;
4351 {
4352     typval_T	var2;
4353     int		op;
4354     long	n1, n2;
4355     int		error = FALSE;
4356 
4357     /*
4358      * Get the first variable.
4359      */
4360     if (eval7(arg, rettv, evaluate) == FAIL)
4361 	return FAIL;
4362 
4363     /*
4364      * Repeat computing, until no '*', '/' or '%' is following.
4365      */
4366     for (;;)
4367     {
4368 	op = **arg;
4369 	if (op != '*' && op != '/' && op != '%')
4370 	    break;
4371 
4372 	if (evaluate)
4373 	{
4374 	    n1 = get_tv_number_chk(rettv, &error);
4375 	    clear_tv(rettv);
4376 	    if (error)
4377 		return FAIL;
4378 	}
4379 	else
4380 	    n1 = 0;
4381 
4382 	/*
4383 	 * Get the second variable.
4384 	 */
4385 	*arg = skipwhite(*arg + 1);
4386 	if (eval7(arg, &var2, evaluate) == FAIL)
4387 	    return FAIL;
4388 
4389 	if (evaluate)
4390 	{
4391 	    n2 = get_tv_number_chk(&var2, &error);
4392 	    clear_tv(&var2);
4393 	    if (error)
4394 		return FAIL;
4395 
4396 	    /*
4397 	     * Compute the result.
4398 	     */
4399 	    if (op == '*')
4400 		n1 = n1 * n2;
4401 	    else if (op == '/')
4402 	    {
4403 		if (n2 == 0)	/* give an error message? */
4404 		    n1 = 0x7fffffffL;
4405 		else
4406 		    n1 = n1 / n2;
4407 	    }
4408 	    else
4409 	    {
4410 		if (n2 == 0)	/* give an error message? */
4411 		    n1 = 0;
4412 		else
4413 		    n1 = n1 % n2;
4414 	    }
4415 	    rettv->v_type = VAR_NUMBER;
4416 	    rettv->vval.v_number = n1;
4417 	}
4418     }
4419 
4420     return OK;
4421 }
4422 
4423 /*
4424  * Handle sixth level expression:
4425  *  number		number constant
4426  *  "string"		string contstant
4427  *  'string'		literal string contstant
4428  *  &option-name	option value
4429  *  @r			register contents
4430  *  identifier		variable value
4431  *  function()		function call
4432  *  $VAR		environment variable
4433  *  (expression)	nested expression
4434  *  [expr, expr]	List
4435  *  {key: val, key: val}  Dictionary
4436  *
4437  *  Also handle:
4438  *  ! in front		logical NOT
4439  *  - in front		unary minus
4440  *  + in front		unary plus (ignored)
4441  *  trailing []		subscript in String or List
4442  *  trailing .name	entry in Dictionary
4443  *
4444  * "arg" must point to the first non-white of the expression.
4445  * "arg" is advanced to the next non-white after the recognized expression.
4446  *
4447  * Return OK or FAIL.
4448  */
4449     static int
4450 eval7(arg, rettv, evaluate)
4451     char_u	**arg;
4452     typval_T	*rettv;
4453     int		evaluate;
4454 {
4455     long	n;
4456     int		len;
4457     char_u	*s;
4458     int		val;
4459     char_u	*start_leader, *end_leader;
4460     int		ret = OK;
4461     char_u	*alias;
4462 
4463     /*
4464      * Initialise variable so that clear_tv() can't mistake this for a
4465      * string and free a string that isn't there.
4466      */
4467     rettv->v_type = VAR_UNKNOWN;
4468 
4469     /*
4470      * Skip '!' and '-' characters.  They are handled later.
4471      */
4472     start_leader = *arg;
4473     while (**arg == '!' || **arg == '-' || **arg == '+')
4474 	*arg = skipwhite(*arg + 1);
4475     end_leader = *arg;
4476 
4477     switch (**arg)
4478     {
4479     /*
4480      * Number constant.
4481      */
4482     case '0':
4483     case '1':
4484     case '2':
4485     case '3':
4486     case '4':
4487     case '5':
4488     case '6':
4489     case '7':
4490     case '8':
4491     case '9':
4492 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4493 		*arg += len;
4494 		if (evaluate)
4495 		{
4496 		    rettv->v_type = VAR_NUMBER;
4497 		    rettv->vval.v_number = n;
4498 		}
4499 		break;
4500 
4501     /*
4502      * String constant: "string".
4503      */
4504     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4505 		break;
4506 
4507     /*
4508      * Literal string constant: 'str''ing'.
4509      */
4510     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4511 		break;
4512 
4513     /*
4514      * List: [expr, expr]
4515      */
4516     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4517 		break;
4518 
4519     /*
4520      * Dictionary: {key: val, key: val}
4521      */
4522     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4523 		break;
4524 
4525     /*
4526      * Option value: &name
4527      */
4528     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4529 		break;
4530 
4531     /*
4532      * Environment variable: $VAR.
4533      */
4534     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4535 		break;
4536 
4537     /*
4538      * Register contents: @r.
4539      */
4540     case '@':	++*arg;
4541 		if (evaluate)
4542 		{
4543 		    rettv->v_type = VAR_STRING;
4544 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4545 		}
4546 		if (**arg != NUL)
4547 		    ++*arg;
4548 		break;
4549 
4550     /*
4551      * nested expression: (expression).
4552      */
4553     case '(':	*arg = skipwhite(*arg + 1);
4554 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4555 		if (**arg == ')')
4556 		    ++*arg;
4557 		else if (ret == OK)
4558 		{
4559 		    EMSG(_("E110: Missing ')'"));
4560 		    clear_tv(rettv);
4561 		    ret = FAIL;
4562 		}
4563 		break;
4564 
4565     default:	ret = NOTDONE;
4566 		break;
4567     }
4568 
4569     if (ret == NOTDONE)
4570     {
4571 	/*
4572 	 * Must be a variable or function name.
4573 	 * Can also be a curly-braces kind of name: {expr}.
4574 	 */
4575 	s = *arg;
4576 	len = get_name_len(arg, &alias, evaluate, TRUE);
4577 	if (alias != NULL)
4578 	    s = alias;
4579 
4580 	if (len <= 0)
4581 	    ret = FAIL;
4582 	else
4583 	{
4584 	    if (**arg == '(')		/* recursive! */
4585 	    {
4586 		/* If "s" is the name of a variable of type VAR_FUNC
4587 		 * use its contents. */
4588 		s = deref_func_name(s, &len);
4589 
4590 		/* Invoke the function. */
4591 		ret = get_func_tv(s, len, rettv, arg,
4592 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4593 			  &len, evaluate, NULL);
4594 		/* Stop the expression evaluation when immediately
4595 		 * aborting on error, or when an interrupt occurred or
4596 		 * an exception was thrown but not caught. */
4597 		if (aborting())
4598 		{
4599 		    if (ret == OK)
4600 			clear_tv(rettv);
4601 		    ret = FAIL;
4602 		}
4603 	    }
4604 	    else if (evaluate)
4605 		ret = get_var_tv(s, len, rettv, TRUE);
4606 	    else
4607 		ret = OK;
4608 	}
4609 
4610 	if (alias != NULL)
4611 	    vim_free(alias);
4612     }
4613 
4614     *arg = skipwhite(*arg);
4615 
4616     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4617      * expr(expr). */
4618     if (ret == OK)
4619 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4620 
4621     /*
4622      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4623      */
4624     if (ret == OK && evaluate && end_leader > start_leader)
4625     {
4626 	int	    error = FALSE;
4627 
4628 	val = get_tv_number_chk(rettv, &error);
4629 	if (error)
4630 	{
4631 	    clear_tv(rettv);
4632 	    ret = FAIL;
4633 	}
4634 	else
4635 	{
4636 	    while (end_leader > start_leader)
4637 	    {
4638 		--end_leader;
4639 		if (*end_leader == '!')
4640 		    val = !val;
4641 		else if (*end_leader == '-')
4642 		    val = -val;
4643 	    }
4644 	    clear_tv(rettv);
4645 	    rettv->v_type = VAR_NUMBER;
4646 	    rettv->vval.v_number = val;
4647 	}
4648     }
4649 
4650     return ret;
4651 }
4652 
4653 /*
4654  * Evaluate an "[expr]" or "[expr:expr]" index.
4655  * "*arg" points to the '['.
4656  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4657  */
4658     static int
4659 eval_index(arg, rettv, evaluate, verbose)
4660     char_u	**arg;
4661     typval_T	*rettv;
4662     int		evaluate;
4663     int		verbose;	/* give error messages */
4664 {
4665     int		empty1 = FALSE, empty2 = FALSE;
4666     typval_T	var1, var2;
4667     long	n1, n2 = 0;
4668     long	len = -1;
4669     int		range = FALSE;
4670     char_u	*s;
4671     char_u	*key = NULL;
4672 
4673     if (rettv->v_type == VAR_FUNC)
4674     {
4675 	if (verbose)
4676 	    EMSG(_("E695: Cannot index a Funcref"));
4677 	return FAIL;
4678     }
4679 
4680     if (**arg == '.')
4681     {
4682 	/*
4683 	 * dict.name
4684 	 */
4685 	key = *arg + 1;
4686 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4687 	    ;
4688 	if (len == 0)
4689 	    return FAIL;
4690 	*arg = skipwhite(key + len);
4691     }
4692     else
4693     {
4694 	/*
4695 	 * something[idx]
4696 	 *
4697 	 * Get the (first) variable from inside the [].
4698 	 */
4699 	*arg = skipwhite(*arg + 1);
4700 	if (**arg == ':')
4701 	    empty1 = TRUE;
4702 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4703 	    return FAIL;
4704 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4705 	{
4706 	    /* not a number or string */
4707 	    clear_tv(&var1);
4708 	    return FAIL;
4709 	}
4710 
4711 	/*
4712 	 * Get the second variable from inside the [:].
4713 	 */
4714 	if (**arg == ':')
4715 	{
4716 	    range = TRUE;
4717 	    *arg = skipwhite(*arg + 1);
4718 	    if (**arg == ']')
4719 		empty2 = TRUE;
4720 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4721 	    {
4722 		if (!empty1)
4723 		    clear_tv(&var1);
4724 		return FAIL;
4725 	    }
4726 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4727 	    {
4728 		/* not a number or string */
4729 		if (!empty1)
4730 		    clear_tv(&var1);
4731 		clear_tv(&var2);
4732 		return FAIL;
4733 	    }
4734 	}
4735 
4736 	/* Check for the ']'. */
4737 	if (**arg != ']')
4738 	{
4739 	    if (verbose)
4740 		EMSG(_(e_missbrac));
4741 	    clear_tv(&var1);
4742 	    if (range)
4743 		clear_tv(&var2);
4744 	    return FAIL;
4745 	}
4746 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4747     }
4748 
4749     if (evaluate)
4750     {
4751 	n1 = 0;
4752 	if (!empty1 && rettv->v_type != VAR_DICT)
4753 	{
4754 	    n1 = get_tv_number(&var1);
4755 	    clear_tv(&var1);
4756 	}
4757 	if (range)
4758 	{
4759 	    if (empty2)
4760 		n2 = -1;
4761 	    else
4762 	    {
4763 		n2 = get_tv_number(&var2);
4764 		clear_tv(&var2);
4765 	    }
4766 	}
4767 
4768 	switch (rettv->v_type)
4769 	{
4770 	    case VAR_NUMBER:
4771 	    case VAR_STRING:
4772 		s = get_tv_string(rettv);
4773 		len = (long)STRLEN(s);
4774 		if (range)
4775 		{
4776 		    /* The resulting variable is a substring.  If the indexes
4777 		     * are out of range the result is empty. */
4778 		    if (n1 < 0)
4779 		    {
4780 			n1 = len + n1;
4781 			if (n1 < 0)
4782 			    n1 = 0;
4783 		    }
4784 		    if (n2 < 0)
4785 			n2 = len + n2;
4786 		    else if (n2 >= len)
4787 			n2 = len;
4788 		    if (n1 >= len || n2 < 0 || n1 > n2)
4789 			s = NULL;
4790 		    else
4791 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4792 		}
4793 		else
4794 		{
4795 		    /* The resulting variable is a string of a single
4796 		     * character.  If the index is too big or negative the
4797 		     * result is empty. */
4798 		    if (n1 >= len || n1 < 0)
4799 			s = NULL;
4800 		    else
4801 			s = vim_strnsave(s + n1, 1);
4802 		}
4803 		clear_tv(rettv);
4804 		rettv->v_type = VAR_STRING;
4805 		rettv->vval.v_string = s;
4806 		break;
4807 
4808 	    case VAR_LIST:
4809 		len = list_len(rettv->vval.v_list);
4810 		if (n1 < 0)
4811 		    n1 = len + n1;
4812 		if (!empty1 && (n1 < 0 || n1 >= len))
4813 		{
4814 		    if (verbose)
4815 			EMSGN(_(e_listidx), n1);
4816 		    return FAIL;
4817 		}
4818 		if (range)
4819 		{
4820 		    list_T	*l;
4821 		    listitem_T	*item;
4822 
4823 		    if (n2 < 0)
4824 			n2 = len + n2;
4825 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4826 		    {
4827 			if (verbose)
4828 			    EMSGN(_(e_listidx), n2);
4829 			return FAIL;
4830 		    }
4831 		    l = list_alloc();
4832 		    if (l == NULL)
4833 			return FAIL;
4834 		    for (item = list_find(rettv->vval.v_list, n1);
4835 							       n1 <= n2; ++n1)
4836 		    {
4837 			if (list_append_tv(l, &item->li_tv) == FAIL)
4838 			{
4839 			    list_free(l);
4840 			    return FAIL;
4841 			}
4842 			item = item->li_next;
4843 		    }
4844 		    clear_tv(rettv);
4845 		    rettv->v_type = VAR_LIST;
4846 		    rettv->vval.v_list = l;
4847 		    ++l->lv_refcount;
4848 		}
4849 		else
4850 		{
4851 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4852 								       &var1);
4853 		    clear_tv(rettv);
4854 		    *rettv = var1;
4855 		}
4856 		break;
4857 
4858 	    case VAR_DICT:
4859 		if (range)
4860 		{
4861 		    if (verbose)
4862 			EMSG(_(e_dictrange));
4863 		    if (len == -1)
4864 			clear_tv(&var1);
4865 		    return FAIL;
4866 		}
4867 		{
4868 		    dictitem_T	*item;
4869 
4870 		    if (len == -1)
4871 		    {
4872 			key = get_tv_string(&var1);
4873 			if (*key == NUL)
4874 			{
4875 			    if (verbose)
4876 				EMSG(_(e_emptykey));
4877 			    clear_tv(&var1);
4878 			    return FAIL;
4879 			}
4880 		    }
4881 
4882 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4883 
4884 		    if (item == NULL && verbose)
4885 			EMSG2(_(e_dictkey), key);
4886 		    if (len == -1)
4887 			clear_tv(&var1);
4888 		    if (item == NULL)
4889 			return FAIL;
4890 
4891 		    copy_tv(&item->di_tv, &var1);
4892 		    clear_tv(rettv);
4893 		    *rettv = var1;
4894 		}
4895 		break;
4896 	}
4897     }
4898 
4899     return OK;
4900 }
4901 
4902 /*
4903  * Get an option value.
4904  * "arg" points to the '&' or '+' before the option name.
4905  * "arg" is advanced to character after the option name.
4906  * Return OK or FAIL.
4907  */
4908     static int
4909 get_option_tv(arg, rettv, evaluate)
4910     char_u	**arg;
4911     typval_T	*rettv;	/* when NULL, only check if option exists */
4912     int		evaluate;
4913 {
4914     char_u	*option_end;
4915     long	numval;
4916     char_u	*stringval;
4917     int		opt_type;
4918     int		c;
4919     int		working = (**arg == '+');    /* has("+option") */
4920     int		ret = OK;
4921     int		opt_flags;
4922 
4923     /*
4924      * Isolate the option name and find its value.
4925      */
4926     option_end = find_option_end(arg, &opt_flags);
4927     if (option_end == NULL)
4928     {
4929 	if (rettv != NULL)
4930 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4931 	return FAIL;
4932     }
4933 
4934     if (!evaluate)
4935     {
4936 	*arg = option_end;
4937 	return OK;
4938     }
4939 
4940     c = *option_end;
4941     *option_end = NUL;
4942     opt_type = get_option_value(*arg, &numval,
4943 			       rettv == NULL ? NULL : &stringval, opt_flags);
4944 
4945     if (opt_type == -3)			/* invalid name */
4946     {
4947 	if (rettv != NULL)
4948 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4949 	ret = FAIL;
4950     }
4951     else if (rettv != NULL)
4952     {
4953 	if (opt_type == -2)		/* hidden string option */
4954 	{
4955 	    rettv->v_type = VAR_STRING;
4956 	    rettv->vval.v_string = NULL;
4957 	}
4958 	else if (opt_type == -1)	/* hidden number option */
4959 	{
4960 	    rettv->v_type = VAR_NUMBER;
4961 	    rettv->vval.v_number = 0;
4962 	}
4963 	else if (opt_type == 1)		/* number option */
4964 	{
4965 	    rettv->v_type = VAR_NUMBER;
4966 	    rettv->vval.v_number = numval;
4967 	}
4968 	else				/* string option */
4969 	{
4970 	    rettv->v_type = VAR_STRING;
4971 	    rettv->vval.v_string = stringval;
4972 	}
4973     }
4974     else if (working && (opt_type == -2 || opt_type == -1))
4975 	ret = FAIL;
4976 
4977     *option_end = c;		    /* put back for error messages */
4978     *arg = option_end;
4979 
4980     return ret;
4981 }
4982 
4983 /*
4984  * Allocate a variable for a string constant.
4985  * Return OK or FAIL.
4986  */
4987     static int
4988 get_string_tv(arg, rettv, evaluate)
4989     char_u	**arg;
4990     typval_T	*rettv;
4991     int		evaluate;
4992 {
4993     char_u	*p;
4994     char_u	*name;
4995     int		extra = 0;
4996 
4997     /*
4998      * Find the end of the string, skipping backslashed characters.
4999      */
5000     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
5001     {
5002 	if (*p == '\\' && p[1] != NUL)
5003 	{
5004 	    ++p;
5005 	    /* A "\<x>" form occupies at least 4 characters, and produces up
5006 	     * to 6 characters: reserve space for 2 extra */
5007 	    if (*p == '<')
5008 		extra += 2;
5009 	}
5010     }
5011 
5012     if (*p != '"')
5013     {
5014 	EMSG2(_("E114: Missing quote: %s"), *arg);
5015 	return FAIL;
5016     }
5017 
5018     /* If only parsing, set *arg and return here */
5019     if (!evaluate)
5020     {
5021 	*arg = p + 1;
5022 	return OK;
5023     }
5024 
5025     /*
5026      * Copy the string into allocated memory, handling backslashed
5027      * characters.
5028      */
5029     name = alloc((unsigned)(p - *arg + extra));
5030     if (name == NULL)
5031 	return FAIL;
5032     rettv->v_type = VAR_STRING;
5033     rettv->vval.v_string = name;
5034 
5035     for (p = *arg + 1; *p != NUL && *p != '"'; )
5036     {
5037 	if (*p == '\\')
5038 	{
5039 	    switch (*++p)
5040 	    {
5041 		case 'b': *name++ = BS; ++p; break;
5042 		case 'e': *name++ = ESC; ++p; break;
5043 		case 'f': *name++ = FF; ++p; break;
5044 		case 'n': *name++ = NL; ++p; break;
5045 		case 'r': *name++ = CAR; ++p; break;
5046 		case 't': *name++ = TAB; ++p; break;
5047 
5048 		case 'X': /* hex: "\x1", "\x12" */
5049 		case 'x':
5050 		case 'u': /* Unicode: "\u0023" */
5051 		case 'U':
5052 			  if (vim_isxdigit(p[1]))
5053 			  {
5054 			      int	n, nr;
5055 			      int	c = toupper(*p);
5056 
5057 			      if (c == 'X')
5058 				  n = 2;
5059 			      else
5060 				  n = 4;
5061 			      nr = 0;
5062 			      while (--n >= 0 && vim_isxdigit(p[1]))
5063 			      {
5064 				  ++p;
5065 				  nr = (nr << 4) + hex2nr(*p);
5066 			      }
5067 			      ++p;
5068 #ifdef FEAT_MBYTE
5069 			      /* For "\u" store the number according to
5070 			       * 'encoding'. */
5071 			      if (c != 'X')
5072 				  name += (*mb_char2bytes)(nr, name);
5073 			      else
5074 #endif
5075 				  *name++ = nr;
5076 			  }
5077 			  break;
5078 
5079 			  /* octal: "\1", "\12", "\123" */
5080 		case '0':
5081 		case '1':
5082 		case '2':
5083 		case '3':
5084 		case '4':
5085 		case '5':
5086 		case '6':
5087 		case '7': *name = *p++ - '0';
5088 			  if (*p >= '0' && *p <= '7')
5089 			  {
5090 			      *name = (*name << 3) + *p++ - '0';
5091 			      if (*p >= '0' && *p <= '7')
5092 				  *name = (*name << 3) + *p++ - '0';
5093 			  }
5094 			  ++name;
5095 			  break;
5096 
5097 			    /* Special key, e.g.: "\<C-W>" */
5098 		case '<': extra = trans_special(&p, name, TRUE);
5099 			  if (extra != 0)
5100 			  {
5101 			      name += extra;
5102 			      break;
5103 			  }
5104 			  /* FALLTHROUGH */
5105 
5106 		default:  MB_COPY_CHAR(p, name);
5107 			  break;
5108 	    }
5109 	}
5110 	else
5111 	    MB_COPY_CHAR(p, name);
5112 
5113     }
5114     *name = NUL;
5115     *arg = p + 1;
5116 
5117     return OK;
5118 }
5119 
5120 /*
5121  * Allocate a variable for a 'str''ing' constant.
5122  * Return OK or FAIL.
5123  */
5124     static int
5125 get_lit_string_tv(arg, rettv, evaluate)
5126     char_u	**arg;
5127     typval_T	*rettv;
5128     int		evaluate;
5129 {
5130     char_u	*p;
5131     char_u	*str;
5132     int		reduce = 0;
5133 
5134     /*
5135      * Find the end of the string, skipping ''.
5136      */
5137     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5138     {
5139 	if (*p == '\'')
5140 	{
5141 	    if (p[1] != '\'')
5142 		break;
5143 	    ++reduce;
5144 	    ++p;
5145 	}
5146     }
5147 
5148     if (*p != '\'')
5149     {
5150 	EMSG2(_("E115: Missing quote: %s"), *arg);
5151 	return FAIL;
5152     }
5153 
5154     /* If only parsing return after setting "*arg" */
5155     if (!evaluate)
5156     {
5157 	*arg = p + 1;
5158 	return OK;
5159     }
5160 
5161     /*
5162      * Copy the string into allocated memory, handling '' to ' reduction.
5163      */
5164     str = alloc((unsigned)((p - *arg) - reduce));
5165     if (str == NULL)
5166 	return FAIL;
5167     rettv->v_type = VAR_STRING;
5168     rettv->vval.v_string = str;
5169 
5170     for (p = *arg + 1; *p != NUL; )
5171     {
5172 	if (*p == '\'')
5173 	{
5174 	    if (p[1] != '\'')
5175 		break;
5176 	    ++p;
5177 	}
5178 	MB_COPY_CHAR(p, str);
5179     }
5180     *str = NUL;
5181     *arg = p + 1;
5182 
5183     return OK;
5184 }
5185 
5186 /*
5187  * Allocate a variable for a List and fill it from "*arg".
5188  * Return OK or FAIL.
5189  */
5190     static int
5191 get_list_tv(arg, rettv, evaluate)
5192     char_u	**arg;
5193     typval_T	*rettv;
5194     int		evaluate;
5195 {
5196     list_T	*l = NULL;
5197     typval_T	tv;
5198     listitem_T	*item;
5199 
5200     if (evaluate)
5201     {
5202 	l = list_alloc();
5203 	if (l == NULL)
5204 	    return FAIL;
5205     }
5206 
5207     *arg = skipwhite(*arg + 1);
5208     while (**arg != ']' && **arg != NUL)
5209     {
5210 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5211 	    goto failret;
5212 	if (evaluate)
5213 	{
5214 	    item = listitem_alloc();
5215 	    if (item != NULL)
5216 	    {
5217 		item->li_tv = tv;
5218 		item->li_tv.v_lock = 0;
5219 		list_append(l, item);
5220 	    }
5221 	    else
5222 		clear_tv(&tv);
5223 	}
5224 
5225 	if (**arg == ']')
5226 	    break;
5227 	if (**arg != ',')
5228 	{
5229 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5230 	    goto failret;
5231 	}
5232 	*arg = skipwhite(*arg + 1);
5233     }
5234 
5235     if (**arg != ']')
5236     {
5237 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5238 failret:
5239 	if (evaluate)
5240 	    list_free(l);
5241 	return FAIL;
5242     }
5243 
5244     *arg = skipwhite(*arg + 1);
5245     if (evaluate)
5246     {
5247 	rettv->v_type = VAR_LIST;
5248 	rettv->vval.v_list = l;
5249 	++l->lv_refcount;
5250     }
5251 
5252     return OK;
5253 }
5254 
5255 /*
5256  * Allocate an empty header for a list.
5257  * Caller should take care of the reference count.
5258  */
5259     list_T *
5260 list_alloc()
5261 {
5262     list_T  *l;
5263 
5264     l = (list_T *)alloc_clear(sizeof(list_T));
5265     if (l != NULL)
5266     {
5267 	/* Prepend the list to the list of lists for garbage collection. */
5268 	if (first_list != NULL)
5269 	    first_list->lv_used_prev = l;
5270 	l->lv_used_prev = NULL;
5271 	l->lv_used_next = first_list;
5272 	first_list = l;
5273     }
5274     return l;
5275 }
5276 
5277 /*
5278  * Allocate an empty list for a return value.
5279  * Returns OK or FAIL.
5280  */
5281     static int
5282 rettv_list_alloc(rettv)
5283     typval_T	*rettv;
5284 {
5285     list_T	*l = list_alloc();
5286 
5287     if (l == NULL)
5288 	return FAIL;
5289 
5290     rettv->vval.v_list = l;
5291     rettv->v_type = VAR_LIST;
5292     ++l->lv_refcount;
5293     return OK;
5294 }
5295 
5296 /*
5297  * Unreference a list: decrement the reference count and free it when it
5298  * becomes zero.
5299  */
5300     void
5301 list_unref(l)
5302     list_T *l;
5303 {
5304     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5305 	list_free(l);
5306 }
5307 
5308 /*
5309  * Free a list, including all items it points to.
5310  * Ignores the reference count.
5311  */
5312     void
5313 list_free(l)
5314     list_T *l;
5315 {
5316     listitem_T *item;
5317 
5318     /* Avoid that recursive reference to the list frees us again. */
5319     l->lv_refcount = DEL_REFCOUNT;
5320 
5321     /* Remove the list from the list of lists for garbage collection. */
5322     if (l->lv_used_prev == NULL)
5323 	first_list = l->lv_used_next;
5324     else
5325 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5326     if (l->lv_used_next != NULL)
5327 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5328 
5329     for (item = l->lv_first; item != NULL; item = l->lv_first)
5330     {
5331 	/* Remove the item before deleting it. */
5332 	l->lv_first = item->li_next;
5333 	listitem_free(item);
5334     }
5335     vim_free(l);
5336 }
5337 
5338 /*
5339  * Allocate a list item.
5340  */
5341     static listitem_T *
5342 listitem_alloc()
5343 {
5344     return (listitem_T *)alloc(sizeof(listitem_T));
5345 }
5346 
5347 /*
5348  * Free a list item.  Also clears the value.  Does not notify watchers.
5349  */
5350     static void
5351 listitem_free(item)
5352     listitem_T *item;
5353 {
5354     clear_tv(&item->li_tv);
5355     vim_free(item);
5356 }
5357 
5358 /*
5359  * Remove a list item from a List and free it.  Also clears the value.
5360  */
5361     static void
5362 listitem_remove(l, item)
5363     list_T  *l;
5364     listitem_T *item;
5365 {
5366     list_remove(l, item, item);
5367     listitem_free(item);
5368 }
5369 
5370 /*
5371  * Get the number of items in a list.
5372  */
5373     static long
5374 list_len(l)
5375     list_T	*l;
5376 {
5377     if (l == NULL)
5378 	return 0L;
5379     return l->lv_len;
5380 }
5381 
5382 /*
5383  * Return TRUE when two lists have exactly the same values.
5384  */
5385     static int
5386 list_equal(l1, l2, ic)
5387     list_T	*l1;
5388     list_T	*l2;
5389     int		ic;	/* ignore case for strings */
5390 {
5391     listitem_T	*item1, *item2;
5392 
5393     if (list_len(l1) != list_len(l2))
5394 	return FALSE;
5395 
5396     for (item1 = l1->lv_first, item2 = l2->lv_first;
5397 	    item1 != NULL && item2 != NULL;
5398 			       item1 = item1->li_next, item2 = item2->li_next)
5399 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5400 	    return FALSE;
5401     return item1 == NULL && item2 == NULL;
5402 }
5403 
5404 #if defined(FEAT_PYTHON) || defined(PROTO)
5405 /*
5406  * Return the dictitem that an entry in a hashtable points to.
5407  */
5408     dictitem_T *
5409 dict_lookup(hi)
5410     hashitem_T *hi;
5411 {
5412     return HI2DI(hi);
5413 }
5414 #endif
5415 
5416 /*
5417  * Return TRUE when two dictionaries have exactly the same key/values.
5418  */
5419     static int
5420 dict_equal(d1, d2, ic)
5421     dict_T	*d1;
5422     dict_T	*d2;
5423     int		ic;	/* ignore case for strings */
5424 {
5425     hashitem_T	*hi;
5426     dictitem_T	*item2;
5427     int		todo;
5428 
5429     if (dict_len(d1) != dict_len(d2))
5430 	return FALSE;
5431 
5432     todo = d1->dv_hashtab.ht_used;
5433     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5434     {
5435 	if (!HASHITEM_EMPTY(hi))
5436 	{
5437 	    item2 = dict_find(d2, hi->hi_key, -1);
5438 	    if (item2 == NULL)
5439 		return FALSE;
5440 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5441 		return FALSE;
5442 	    --todo;
5443 	}
5444     }
5445     return TRUE;
5446 }
5447 
5448 /*
5449  * Return TRUE if "tv1" and "tv2" have the same value.
5450  * Compares the items just like "==" would compare them, but strings and
5451  * numbers are different.
5452  */
5453     static int
5454 tv_equal(tv1, tv2, ic)
5455     typval_T *tv1;
5456     typval_T *tv2;
5457     int	    ic;	    /* ignore case */
5458 {
5459     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5460     char_u	*s1, *s2;
5461 
5462     if (tv1->v_type != tv2->v_type)
5463 	return FALSE;
5464 
5465     switch (tv1->v_type)
5466     {
5467 	case VAR_LIST:
5468 	    /* recursive! */
5469 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5470 
5471 	case VAR_DICT:
5472 	    /* recursive! */
5473 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5474 
5475 	case VAR_FUNC:
5476 	    return (tv1->vval.v_string != NULL
5477 		    && tv2->vval.v_string != NULL
5478 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5479 
5480 	case VAR_NUMBER:
5481 	    return tv1->vval.v_number == tv2->vval.v_number;
5482 
5483 	case VAR_STRING:
5484 	    s1 = get_tv_string_buf(tv1, buf1);
5485 	    s2 = get_tv_string_buf(tv2, buf2);
5486 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5487     }
5488 
5489     EMSG2(_(e_intern2), "tv_equal()");
5490     return TRUE;
5491 }
5492 
5493 /*
5494  * Locate item with index "n" in list "l" and return it.
5495  * A negative index is counted from the end; -1 is the last item.
5496  * Returns NULL when "n" is out of range.
5497  */
5498     static listitem_T *
5499 list_find(l, n)
5500     list_T	*l;
5501     long	n;
5502 {
5503     listitem_T	*item;
5504     long	idx;
5505 
5506     if (l == NULL)
5507 	return NULL;
5508 
5509     /* Negative index is relative to the end. */
5510     if (n < 0)
5511 	n = l->lv_len + n;
5512 
5513     /* Check for index out of range. */
5514     if (n < 0 || n >= l->lv_len)
5515 	return NULL;
5516 
5517     /* When there is a cached index may start search from there. */
5518     if (l->lv_idx_item != NULL)
5519     {
5520 	if (n < l->lv_idx / 2)
5521 	{
5522 	    /* closest to the start of the list */
5523 	    item = l->lv_first;
5524 	    idx = 0;
5525 	}
5526 	else if (n > (l->lv_idx + l->lv_len) / 2)
5527 	{
5528 	    /* closest to the end of the list */
5529 	    item = l->lv_last;
5530 	    idx = l->lv_len - 1;
5531 	}
5532 	else
5533 	{
5534 	    /* closest to the cached index */
5535 	    item = l->lv_idx_item;
5536 	    idx = l->lv_idx;
5537 	}
5538     }
5539     else
5540     {
5541 	if (n < l->lv_len / 2)
5542 	{
5543 	    /* closest to the start of the list */
5544 	    item = l->lv_first;
5545 	    idx = 0;
5546 	}
5547 	else
5548 	{
5549 	    /* closest to the end of the list */
5550 	    item = l->lv_last;
5551 	    idx = l->lv_len - 1;
5552 	}
5553     }
5554 
5555     while (n > idx)
5556     {
5557 	/* search forward */
5558 	item = item->li_next;
5559 	++idx;
5560     }
5561     while (n < idx)
5562     {
5563 	/* search backward */
5564 	item = item->li_prev;
5565 	--idx;
5566     }
5567 
5568     /* cache the used index */
5569     l->lv_idx = idx;
5570     l->lv_idx_item = item;
5571 
5572     return item;
5573 }
5574 
5575 /*
5576  * Get list item "l[idx]" as a number.
5577  */
5578     static long
5579 list_find_nr(l, idx, errorp)
5580     list_T	*l;
5581     long	idx;
5582     int		*errorp;	/* set to TRUE when something wrong */
5583 {
5584     listitem_T	*li;
5585 
5586     li = list_find(l, idx);
5587     if (li == NULL)
5588     {
5589 	if (errorp != NULL)
5590 	    *errorp = TRUE;
5591 	return -1L;
5592     }
5593     return get_tv_number_chk(&li->li_tv, errorp);
5594 }
5595 
5596 /*
5597  * Locate "item" list "l" and return its index.
5598  * Returns -1 when "item" is not in the list.
5599  */
5600     static long
5601 list_idx_of_item(l, item)
5602     list_T	*l;
5603     listitem_T	*item;
5604 {
5605     long	idx = 0;
5606     listitem_T	*li;
5607 
5608     if (l == NULL)
5609 	return -1;
5610     idx = 0;
5611     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5612 	++idx;
5613     if (li == NULL)
5614 	return -1;
5615     return idx;
5616 }
5617 
5618 /*
5619  * Append item "item" to the end of list "l".
5620  */
5621     static void
5622 list_append(l, item)
5623     list_T	*l;
5624     listitem_T	*item;
5625 {
5626     if (l->lv_last == NULL)
5627     {
5628 	/* empty list */
5629 	l->lv_first = item;
5630 	l->lv_last = item;
5631 	item->li_prev = NULL;
5632     }
5633     else
5634     {
5635 	l->lv_last->li_next = item;
5636 	item->li_prev = l->lv_last;
5637 	l->lv_last = item;
5638     }
5639     ++l->lv_len;
5640     item->li_next = NULL;
5641 }
5642 
5643 /*
5644  * Append typval_T "tv" to the end of list "l".
5645  * Return FAIL when out of memory.
5646  */
5647     static int
5648 list_append_tv(l, tv)
5649     list_T	*l;
5650     typval_T	*tv;
5651 {
5652     listitem_T	*li = listitem_alloc();
5653 
5654     if (li == NULL)
5655 	return FAIL;
5656     copy_tv(tv, &li->li_tv);
5657     list_append(l, li);
5658     return OK;
5659 }
5660 
5661 /*
5662  * Add a dictionary to a list.  Used by getqflist().
5663  * Return FAIL when out of memory.
5664  */
5665     int
5666 list_append_dict(list, dict)
5667     list_T	*list;
5668     dict_T	*dict;
5669 {
5670     listitem_T	*li = listitem_alloc();
5671 
5672     if (li == NULL)
5673 	return FAIL;
5674     li->li_tv.v_type = VAR_DICT;
5675     li->li_tv.v_lock = 0;
5676     li->li_tv.vval.v_dict = dict;
5677     list_append(list, li);
5678     ++dict->dv_refcount;
5679     return OK;
5680 }
5681 
5682 /*
5683  * Make a copy of "str" and append it as an item to list "l".
5684  * When "len" >= 0 use "str[len]".
5685  * Returns FAIL when out of memory.
5686  */
5687     static int
5688 list_append_string(l, str, len)
5689     list_T	*l;
5690     char_u	*str;
5691     int		len;
5692 {
5693     listitem_T *li = listitem_alloc();
5694 
5695     if (li == NULL)
5696 	return FAIL;
5697     list_append(l, li);
5698     li->li_tv.v_type = VAR_STRING;
5699     li->li_tv.v_lock = 0;
5700     if ((li->li_tv.vval.v_string = (len >= 0 ? vim_strnsave(str, len)
5701 						 : vim_strsave(str))) == NULL)
5702 	return FAIL;
5703     return OK;
5704 }
5705 
5706 /*
5707  * Append "n" to list "l".
5708  * Returns FAIL when out of memory.
5709  */
5710     static int
5711 list_append_number(l, n)
5712     list_T	*l;
5713     varnumber_T	n;
5714 {
5715     listitem_T	*li;
5716 
5717     li = listitem_alloc();
5718     if (li == NULL)
5719 	return FAIL;
5720     li->li_tv.v_type = VAR_NUMBER;
5721     li->li_tv.v_lock = 0;
5722     li->li_tv.vval.v_number = n;
5723     list_append(l, li);
5724     return OK;
5725 }
5726 
5727 /*
5728  * Insert typval_T "tv" in list "l" before "item".
5729  * If "item" is NULL append at the end.
5730  * Return FAIL when out of memory.
5731  */
5732     static int
5733 list_insert_tv(l, tv, item)
5734     list_T	*l;
5735     typval_T	*tv;
5736     listitem_T	*item;
5737 {
5738     listitem_T	*ni = listitem_alloc();
5739 
5740     if (ni == NULL)
5741 	return FAIL;
5742     copy_tv(tv, &ni->li_tv);
5743     if (item == NULL)
5744 	/* Append new item at end of list. */
5745 	list_append(l, ni);
5746     else
5747     {
5748 	/* Insert new item before existing item. */
5749 	ni->li_prev = item->li_prev;
5750 	ni->li_next = item;
5751 	if (item->li_prev == NULL)
5752 	{
5753 	    l->lv_first = ni;
5754 	    ++l->lv_idx;
5755 	}
5756 	else
5757 	{
5758 	    item->li_prev->li_next = ni;
5759 	    l->lv_idx_item = NULL;
5760 	}
5761 	item->li_prev = ni;
5762 	++l->lv_len;
5763     }
5764     return OK;
5765 }
5766 
5767 /*
5768  * Extend "l1" with "l2".
5769  * If "bef" is NULL append at the end, otherwise insert before this item.
5770  * Returns FAIL when out of memory.
5771  */
5772     static int
5773 list_extend(l1, l2, bef)
5774     list_T	*l1;
5775     list_T	*l2;
5776     listitem_T	*bef;
5777 {
5778     listitem_T	*item;
5779 
5780     for (item = l2->lv_first; item != NULL; item = item->li_next)
5781 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5782 	    return FAIL;
5783     return OK;
5784 }
5785 
5786 /*
5787  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5788  * Return FAIL when out of memory.
5789  */
5790     static int
5791 list_concat(l1, l2, tv)
5792     list_T	*l1;
5793     list_T	*l2;
5794     typval_T	*tv;
5795 {
5796     list_T	*l;
5797 
5798     /* make a copy of the first list. */
5799     l = list_copy(l1, FALSE, 0);
5800     if (l == NULL)
5801 	return FAIL;
5802     tv->v_type = VAR_LIST;
5803     tv->vval.v_list = l;
5804 
5805     /* append all items from the second list */
5806     return list_extend(l, l2, NULL);
5807 }
5808 
5809 /*
5810  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5811  * The refcount of the new list is set to 1.
5812  * See item_copy() for "copyID".
5813  * Returns NULL when out of memory.
5814  */
5815     static list_T *
5816 list_copy(orig, deep, copyID)
5817     list_T	*orig;
5818     int		deep;
5819     int		copyID;
5820 {
5821     list_T	*copy;
5822     listitem_T	*item;
5823     listitem_T	*ni;
5824 
5825     if (orig == NULL)
5826 	return NULL;
5827 
5828     copy = list_alloc();
5829     if (copy != NULL)
5830     {
5831 	if (copyID != 0)
5832 	{
5833 	    /* Do this before adding the items, because one of the items may
5834 	     * refer back to this list. */
5835 	    orig->lv_copyID = copyID;
5836 	    orig->lv_copylist = copy;
5837 	}
5838 	for (item = orig->lv_first; item != NULL && !got_int;
5839 							 item = item->li_next)
5840 	{
5841 	    ni = listitem_alloc();
5842 	    if (ni == NULL)
5843 		break;
5844 	    if (deep)
5845 	    {
5846 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5847 		{
5848 		    vim_free(ni);
5849 		    break;
5850 		}
5851 	    }
5852 	    else
5853 		copy_tv(&item->li_tv, &ni->li_tv);
5854 	    list_append(copy, ni);
5855 	}
5856 	++copy->lv_refcount;
5857 	if (item != NULL)
5858 	{
5859 	    list_unref(copy);
5860 	    copy = NULL;
5861 	}
5862     }
5863 
5864     return copy;
5865 }
5866 
5867 /*
5868  * Remove items "item" to "item2" from list "l".
5869  * Does not free the listitem or the value!
5870  */
5871     static void
5872 list_remove(l, item, item2)
5873     list_T	*l;
5874     listitem_T	*item;
5875     listitem_T	*item2;
5876 {
5877     listitem_T	*ip;
5878 
5879     /* notify watchers */
5880     for (ip = item; ip != NULL; ip = ip->li_next)
5881     {
5882 	--l->lv_len;
5883 	list_fix_watch(l, ip);
5884 	if (ip == item2)
5885 	    break;
5886     }
5887 
5888     if (item2->li_next == NULL)
5889 	l->lv_last = item->li_prev;
5890     else
5891 	item2->li_next->li_prev = item->li_prev;
5892     if (item->li_prev == NULL)
5893 	l->lv_first = item2->li_next;
5894     else
5895 	item->li_prev->li_next = item2->li_next;
5896     l->lv_idx_item = NULL;
5897 }
5898 
5899 /*
5900  * Return an allocated string with the string representation of a list.
5901  * May return NULL.
5902  */
5903     static char_u *
5904 list2string(tv, copyID)
5905     typval_T	*tv;
5906     int		copyID;
5907 {
5908     garray_T	ga;
5909 
5910     if (tv->vval.v_list == NULL)
5911 	return NULL;
5912     ga_init2(&ga, (int)sizeof(char), 80);
5913     ga_append(&ga, '[');
5914     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE, copyID) == FAIL)
5915     {
5916 	vim_free(ga.ga_data);
5917 	return NULL;
5918     }
5919     ga_append(&ga, ']');
5920     ga_append(&ga, NUL);
5921     return (char_u *)ga.ga_data;
5922 }
5923 
5924 /*
5925  * Join list "l" into a string in "*gap", using separator "sep".
5926  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5927  * Return FAIL or OK.
5928  */
5929     static int
5930 list_join(gap, l, sep, echo, copyID)
5931     garray_T	*gap;
5932     list_T	*l;
5933     char_u	*sep;
5934     int		echo;
5935     int		copyID;
5936 {
5937     int		first = TRUE;
5938     char_u	*tofree;
5939     char_u	numbuf[NUMBUFLEN];
5940     listitem_T	*item;
5941     char_u	*s;
5942 
5943     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5944     {
5945 	if (first)
5946 	    first = FALSE;
5947 	else
5948 	    ga_concat(gap, sep);
5949 
5950 	if (echo)
5951 	    s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
5952 	else
5953 	    s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
5954 	if (s != NULL)
5955 	    ga_concat(gap, s);
5956 	vim_free(tofree);
5957 	if (s == NULL)
5958 	    return FAIL;
5959     }
5960     return OK;
5961 }
5962 
5963 /*
5964  * Garbage collection for lists and dictionaries.
5965  *
5966  * We use reference counts to be able to free most items right away when they
5967  * are no longer used.  But for composite items it's possible that it becomes
5968  * unused while the reference count is > 0: When there is a recursive
5969  * reference.  Example:
5970  *	:let l = [1, 2, 3]
5971  *	:let d = {9: l}
5972  *	:let l[1] = d
5973  *
5974  * Since this is quite unusual we handle this with garbage collection: every
5975  * once in a while find out which lists and dicts are not referenced from any
5976  * variable.
5977  *
5978  * Here is a good reference text about garbage collection (refers to Python
5979  * but it applies to all reference-counting mechanisms):
5980  *	http://python.ca/nas/python/gc/
5981  */
5982 
5983 /*
5984  * Do garbage collection for lists and dicts.
5985  * Return TRUE if some memory was freed.
5986  */
5987     int
5988 garbage_collect()
5989 {
5990     dict_T	*dd;
5991     list_T	*ll;
5992     int		copyID = ++current_copyID;
5993     buf_T	*buf;
5994     win_T	*wp;
5995     int		i;
5996     funccall_T	*fc;
5997     int		did_free = FALSE;
5998 
5999     /*
6000      * 1. Go through all accessible variables and mark all lists and dicts
6001      *    with copyID.
6002      */
6003     /* script-local variables */
6004     for (i = 1; i <= ga_scripts.ga_len; ++i)
6005 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
6006 
6007     /* buffer-local variables */
6008     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
6009 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
6010 
6011     /* window-local variables */
6012     FOR_ALL_WINDOWS(wp)
6013 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
6014 
6015     /* global variables */
6016     set_ref_in_ht(&globvarht, copyID);
6017 
6018     /* function-local variables */
6019     for (fc = current_funccal; fc != NULL; fc = fc->caller)
6020     {
6021 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
6022 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
6023     }
6024 
6025     /*
6026      * 2. Go through the list of dicts and free items without the copyID.
6027      */
6028     for (dd = first_dict; dd != NULL; )
6029 	if (dd->dv_copyID != copyID)
6030 	{
6031 	    dict_free(dd);
6032 	    did_free = TRUE;
6033 
6034 	    /* restart, next dict may also have been freed */
6035 	    dd = first_dict;
6036 	}
6037 	else
6038 	    dd = dd->dv_used_next;
6039 
6040     /*
6041      * 3. Go through the list of lists and free items without the copyID.
6042      *    But don't free a list that has a watcher (used in a for loop), these
6043      *    are not referenced anywhere.
6044      */
6045     for (ll = first_list; ll != NULL; )
6046 	if (ll->lv_copyID != copyID && ll->lv_watch == NULL)
6047 	{
6048 	    list_free(ll);
6049 	    did_free = TRUE;
6050 
6051 	    /* restart, next list may also have been freed */
6052 	    ll = first_list;
6053 	}
6054 	else
6055 	    ll = ll->lv_used_next;
6056 
6057     return did_free;
6058 }
6059 
6060 /*
6061  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
6062  */
6063     static void
6064 set_ref_in_ht(ht, copyID)
6065     hashtab_T	*ht;
6066     int		copyID;
6067 {
6068     int		todo;
6069     hashitem_T	*hi;
6070 
6071     todo = ht->ht_used;
6072     for (hi = ht->ht_array; todo > 0; ++hi)
6073 	if (!HASHITEM_EMPTY(hi))
6074 	{
6075 	    --todo;
6076 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
6077 	}
6078 }
6079 
6080 /*
6081  * Mark all lists and dicts referenced through list "l" with "copyID".
6082  */
6083     static void
6084 set_ref_in_list(l, copyID)
6085     list_T	*l;
6086     int		copyID;
6087 {
6088     listitem_T *li;
6089 
6090     for (li = l->lv_first; li != NULL; li = li->li_next)
6091 	set_ref_in_item(&li->li_tv, copyID);
6092 }
6093 
6094 /*
6095  * Mark all lists and dicts referenced through typval "tv" with "copyID".
6096  */
6097     static void
6098 set_ref_in_item(tv, copyID)
6099     typval_T	*tv;
6100     int		copyID;
6101 {
6102     dict_T	*dd;
6103     list_T	*ll;
6104 
6105     switch (tv->v_type)
6106     {
6107 	case VAR_DICT:
6108 	    dd = tv->vval.v_dict;
6109 	    if (dd->dv_copyID != copyID)
6110 	    {
6111 		/* Didn't see this dict yet. */
6112 		dd->dv_copyID = copyID;
6113 		set_ref_in_ht(&dd->dv_hashtab, copyID);
6114 	    }
6115 	    break;
6116 
6117 	case VAR_LIST:
6118 	    ll = tv->vval.v_list;
6119 	    if (ll->lv_copyID != copyID)
6120 	    {
6121 		/* Didn't see this list yet. */
6122 		ll->lv_copyID = copyID;
6123 		set_ref_in_list(ll, copyID);
6124 	    }
6125 	    break;
6126     }
6127     return;
6128 }
6129 
6130 /*
6131  * Allocate an empty header for a dictionary.
6132  */
6133     dict_T *
6134 dict_alloc()
6135 {
6136     dict_T *d;
6137 
6138     d = (dict_T *)alloc(sizeof(dict_T));
6139     if (d != NULL)
6140     {
6141 	/* Add the list to the hashtable for garbage collection. */
6142 	if (first_dict != NULL)
6143 	    first_dict->dv_used_prev = d;
6144 	d->dv_used_next = first_dict;
6145 	d->dv_used_prev = NULL;
6146 
6147 	hash_init(&d->dv_hashtab);
6148 	d->dv_lock = 0;
6149 	d->dv_refcount = 0;
6150 	d->dv_copyID = 0;
6151     }
6152     return d;
6153 }
6154 
6155 /*
6156  * Unreference a Dictionary: decrement the reference count and free it when it
6157  * becomes zero.
6158  */
6159     static void
6160 dict_unref(d)
6161     dict_T *d;
6162 {
6163     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
6164 	dict_free(d);
6165 }
6166 
6167 /*
6168  * Free a Dictionary, including all items it contains.
6169  * Ignores the reference count.
6170  */
6171     static void
6172 dict_free(d)
6173     dict_T *d;
6174 {
6175     int		todo;
6176     hashitem_T	*hi;
6177     dictitem_T	*di;
6178 
6179     /* Avoid that recursive reference to the dict frees us again. */
6180     d->dv_refcount = DEL_REFCOUNT;
6181 
6182     /* Remove the dict from the list of dicts for garbage collection. */
6183     if (d->dv_used_prev == NULL)
6184 	first_dict = d->dv_used_next;
6185     else
6186 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6187     if (d->dv_used_next != NULL)
6188 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6189 
6190     /* Lock the hashtab, we don't want it to resize while freeing items. */
6191     hash_lock(&d->dv_hashtab);
6192     todo = d->dv_hashtab.ht_used;
6193     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6194     {
6195 	if (!HASHITEM_EMPTY(hi))
6196 	{
6197 	    /* Remove the item before deleting it, just in case there is
6198 	     * something recursive causing trouble. */
6199 	    di = HI2DI(hi);
6200 	    hash_remove(&d->dv_hashtab, hi);
6201 	    dictitem_free(di);
6202 	    --todo;
6203 	}
6204     }
6205     hash_clear(&d->dv_hashtab);
6206     vim_free(d);
6207 }
6208 
6209 /*
6210  * Allocate a Dictionary item.
6211  * The "key" is copied to the new item.
6212  * Note that the value of the item "di_tv" still needs to be initialized!
6213  * Returns NULL when out of memory.
6214  */
6215     static dictitem_T *
6216 dictitem_alloc(key)
6217     char_u	*key;
6218 {
6219     dictitem_T *di;
6220 
6221     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6222     if (di != NULL)
6223     {
6224 	STRCPY(di->di_key, key);
6225 	di->di_flags = 0;
6226     }
6227     return di;
6228 }
6229 
6230 /*
6231  * Make a copy of a Dictionary item.
6232  */
6233     static dictitem_T *
6234 dictitem_copy(org)
6235     dictitem_T *org;
6236 {
6237     dictitem_T *di;
6238 
6239     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6240     if (di != NULL)
6241     {
6242 	STRCPY(di->di_key, org->di_key);
6243 	di->di_flags = 0;
6244 	copy_tv(&org->di_tv, &di->di_tv);
6245     }
6246     return di;
6247 }
6248 
6249 /*
6250  * Remove item "item" from Dictionary "dict" and free it.
6251  */
6252     static void
6253 dictitem_remove(dict, item)
6254     dict_T	*dict;
6255     dictitem_T	*item;
6256 {
6257     hashitem_T	*hi;
6258 
6259     hi = hash_find(&dict->dv_hashtab, item->di_key);
6260     if (HASHITEM_EMPTY(hi))
6261 	EMSG2(_(e_intern2), "dictitem_remove()");
6262     else
6263 	hash_remove(&dict->dv_hashtab, hi);
6264     dictitem_free(item);
6265 }
6266 
6267 /*
6268  * Free a dict item.  Also clears the value.
6269  */
6270     static void
6271 dictitem_free(item)
6272     dictitem_T *item;
6273 {
6274     clear_tv(&item->di_tv);
6275     vim_free(item);
6276 }
6277 
6278 /*
6279  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6280  * The refcount of the new dict is set to 1.
6281  * See item_copy() for "copyID".
6282  * Returns NULL when out of memory.
6283  */
6284     static dict_T *
6285 dict_copy(orig, deep, copyID)
6286     dict_T	*orig;
6287     int		deep;
6288     int		copyID;
6289 {
6290     dict_T	*copy;
6291     dictitem_T	*di;
6292     int		todo;
6293     hashitem_T	*hi;
6294 
6295     if (orig == NULL)
6296 	return NULL;
6297 
6298     copy = dict_alloc();
6299     if (copy != NULL)
6300     {
6301 	if (copyID != 0)
6302 	{
6303 	    orig->dv_copyID = copyID;
6304 	    orig->dv_copydict = copy;
6305 	}
6306 	todo = orig->dv_hashtab.ht_used;
6307 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6308 	{
6309 	    if (!HASHITEM_EMPTY(hi))
6310 	    {
6311 		--todo;
6312 
6313 		di = dictitem_alloc(hi->hi_key);
6314 		if (di == NULL)
6315 		    break;
6316 		if (deep)
6317 		{
6318 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6319 							      copyID) == FAIL)
6320 		    {
6321 			vim_free(di);
6322 			break;
6323 		    }
6324 		}
6325 		else
6326 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6327 		if (dict_add(copy, di) == FAIL)
6328 		{
6329 		    dictitem_free(di);
6330 		    break;
6331 		}
6332 	    }
6333 	}
6334 
6335 	++copy->dv_refcount;
6336 	if (todo > 0)
6337 	{
6338 	    dict_unref(copy);
6339 	    copy = NULL;
6340 	}
6341     }
6342 
6343     return copy;
6344 }
6345 
6346 /*
6347  * Add item "item" to Dictionary "d".
6348  * Returns FAIL when out of memory and when key already existed.
6349  */
6350     static int
6351 dict_add(d, item)
6352     dict_T	*d;
6353     dictitem_T	*item;
6354 {
6355     return hash_add(&d->dv_hashtab, item->di_key);
6356 }
6357 
6358 /*
6359  * Add a number or string entry to dictionary "d".
6360  * When "str" is NULL use number "nr", otherwise use "str".
6361  * Returns FAIL when out of memory and when key already exists.
6362  */
6363     int
6364 dict_add_nr_str(d, key, nr, str)
6365     dict_T	*d;
6366     char	*key;
6367     long	nr;
6368     char_u	*str;
6369 {
6370     dictitem_T	*item;
6371 
6372     item = dictitem_alloc((char_u *)key);
6373     if (item == NULL)
6374 	return FAIL;
6375     item->di_tv.v_lock = 0;
6376     if (str == NULL)
6377     {
6378 	item->di_tv.v_type = VAR_NUMBER;
6379 	item->di_tv.vval.v_number = nr;
6380     }
6381     else
6382     {
6383 	item->di_tv.v_type = VAR_STRING;
6384 	item->di_tv.vval.v_string = vim_strsave(str);
6385     }
6386     if (dict_add(d, item) == FAIL)
6387     {
6388 	dictitem_free(item);
6389 	return FAIL;
6390     }
6391     return OK;
6392 }
6393 
6394 /*
6395  * Get the number of items in a Dictionary.
6396  */
6397     static long
6398 dict_len(d)
6399     dict_T	*d;
6400 {
6401     if (d == NULL)
6402 	return 0L;
6403     return d->dv_hashtab.ht_used;
6404 }
6405 
6406 /*
6407  * Find item "key[len]" in Dictionary "d".
6408  * If "len" is negative use strlen(key).
6409  * Returns NULL when not found.
6410  */
6411     static dictitem_T *
6412 dict_find(d, key, len)
6413     dict_T	*d;
6414     char_u	*key;
6415     int		len;
6416 {
6417 #define AKEYLEN 200
6418     char_u	buf[AKEYLEN];
6419     char_u	*akey;
6420     char_u	*tofree = NULL;
6421     hashitem_T	*hi;
6422 
6423     if (len < 0)
6424 	akey = key;
6425     else if (len >= AKEYLEN)
6426     {
6427 	tofree = akey = vim_strnsave(key, len);
6428 	if (akey == NULL)
6429 	    return NULL;
6430     }
6431     else
6432     {
6433 	/* Avoid a malloc/free by using buf[]. */
6434 	vim_strncpy(buf, key, len);
6435 	akey = buf;
6436     }
6437 
6438     hi = hash_find(&d->dv_hashtab, akey);
6439     vim_free(tofree);
6440     if (HASHITEM_EMPTY(hi))
6441 	return NULL;
6442     return HI2DI(hi);
6443 }
6444 
6445 /*
6446  * Get a string item from a dictionary.
6447  * When "save" is TRUE allocate memory for it.
6448  * Returns NULL if the entry doesn't exist or out of memory.
6449  */
6450     char_u *
6451 get_dict_string(d, key, save)
6452     dict_T	*d;
6453     char_u	*key;
6454     int		save;
6455 {
6456     dictitem_T	*di;
6457     char_u	*s;
6458 
6459     di = dict_find(d, key, -1);
6460     if (di == NULL)
6461 	return NULL;
6462     s = get_tv_string(&di->di_tv);
6463     if (save && s != NULL)
6464 	s = vim_strsave(s);
6465     return s;
6466 }
6467 
6468 /*
6469  * Get a number item from a dictionary.
6470  * Returns 0 if the entry doesn't exist or out of memory.
6471  */
6472     long
6473 get_dict_number(d, key)
6474     dict_T	*d;
6475     char_u	*key;
6476 {
6477     dictitem_T	*di;
6478 
6479     di = dict_find(d, key, -1);
6480     if (di == NULL)
6481 	return 0;
6482     return get_tv_number(&di->di_tv);
6483 }
6484 
6485 /*
6486  * Return an allocated string with the string representation of a Dictionary.
6487  * May return NULL.
6488  */
6489     static char_u *
6490 dict2string(tv, copyID)
6491     typval_T	*tv;
6492     int		copyID;
6493 {
6494     garray_T	ga;
6495     int		first = TRUE;
6496     char_u	*tofree;
6497     char_u	numbuf[NUMBUFLEN];
6498     hashitem_T	*hi;
6499     char_u	*s;
6500     dict_T	*d;
6501     int		todo;
6502 
6503     if ((d = tv->vval.v_dict) == NULL)
6504 	return NULL;
6505     ga_init2(&ga, (int)sizeof(char), 80);
6506     ga_append(&ga, '{');
6507 
6508     todo = d->dv_hashtab.ht_used;
6509     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6510     {
6511 	if (!HASHITEM_EMPTY(hi))
6512 	{
6513 	    --todo;
6514 
6515 	    if (first)
6516 		first = FALSE;
6517 	    else
6518 		ga_concat(&ga, (char_u *)", ");
6519 
6520 	    tofree = string_quote(hi->hi_key, FALSE);
6521 	    if (tofree != NULL)
6522 	    {
6523 		ga_concat(&ga, tofree);
6524 		vim_free(tofree);
6525 	    }
6526 	    ga_concat(&ga, (char_u *)": ");
6527 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
6528 	    if (s != NULL)
6529 		ga_concat(&ga, s);
6530 	    vim_free(tofree);
6531 	    if (s == NULL)
6532 		break;
6533 	}
6534     }
6535     if (todo > 0)
6536     {
6537 	vim_free(ga.ga_data);
6538 	return NULL;
6539     }
6540 
6541     ga_append(&ga, '}');
6542     ga_append(&ga, NUL);
6543     return (char_u *)ga.ga_data;
6544 }
6545 
6546 /*
6547  * Allocate a variable for a Dictionary and fill it from "*arg".
6548  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6549  */
6550     static int
6551 get_dict_tv(arg, rettv, evaluate)
6552     char_u	**arg;
6553     typval_T	*rettv;
6554     int		evaluate;
6555 {
6556     dict_T	*d = NULL;
6557     typval_T	tvkey;
6558     typval_T	tv;
6559     char_u	*key;
6560     dictitem_T	*item;
6561     char_u	*start = skipwhite(*arg + 1);
6562     char_u	buf[NUMBUFLEN];
6563 
6564     /*
6565      * First check if it's not a curly-braces thing: {expr}.
6566      * Must do this without evaluating, otherwise a function may be called
6567      * twice.  Unfortunately this means we need to call eval1() twice for the
6568      * first item.
6569      * But {} is an empty Dictionary.
6570      */
6571     if (*start != '}')
6572     {
6573 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6574 	    return FAIL;
6575 	if (*start == '}')
6576 	    return NOTDONE;
6577     }
6578 
6579     if (evaluate)
6580     {
6581 	d = dict_alloc();
6582 	if (d == NULL)
6583 	    return FAIL;
6584     }
6585     tvkey.v_type = VAR_UNKNOWN;
6586     tv.v_type = VAR_UNKNOWN;
6587 
6588     *arg = skipwhite(*arg + 1);
6589     while (**arg != '}' && **arg != NUL)
6590     {
6591 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6592 	    goto failret;
6593 	if (**arg != ':')
6594 	{
6595 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6596 	    clear_tv(&tvkey);
6597 	    goto failret;
6598 	}
6599 	key = get_tv_string_buf_chk(&tvkey, buf);
6600 	if (key == NULL || *key == NUL)
6601 	{
6602 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6603 	    if (key != NULL)
6604 		EMSG(_(e_emptykey));
6605 	    clear_tv(&tvkey);
6606 	    goto failret;
6607 	}
6608 
6609 	*arg = skipwhite(*arg + 1);
6610 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6611 	{
6612 	    clear_tv(&tvkey);
6613 	    goto failret;
6614 	}
6615 	if (evaluate)
6616 	{
6617 	    item = dict_find(d, key, -1);
6618 	    if (item != NULL)
6619 	    {
6620 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6621 		clear_tv(&tvkey);
6622 		clear_tv(&tv);
6623 		goto failret;
6624 	    }
6625 	    item = dictitem_alloc(key);
6626 	    clear_tv(&tvkey);
6627 	    if (item != NULL)
6628 	    {
6629 		item->di_tv = tv;
6630 		item->di_tv.v_lock = 0;
6631 		if (dict_add(d, item) == FAIL)
6632 		    dictitem_free(item);
6633 	    }
6634 	}
6635 
6636 	if (**arg == '}')
6637 	    break;
6638 	if (**arg != ',')
6639 	{
6640 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6641 	    goto failret;
6642 	}
6643 	*arg = skipwhite(*arg + 1);
6644     }
6645 
6646     if (**arg != '}')
6647     {
6648 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6649 failret:
6650 	if (evaluate)
6651 	    dict_free(d);
6652 	return FAIL;
6653     }
6654 
6655     *arg = skipwhite(*arg + 1);
6656     if (evaluate)
6657     {
6658 	rettv->v_type = VAR_DICT;
6659 	rettv->vval.v_dict = d;
6660 	++d->dv_refcount;
6661     }
6662 
6663     return OK;
6664 }
6665 
6666 /*
6667  * Return a string with the string representation of a variable.
6668  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6669  * "numbuf" is used for a number.
6670  * Does not put quotes around strings, as ":echo" displays values.
6671  * When "copyID" is not NULL replace recursive lists and dicts with "...".
6672  * May return NULL;
6673  */
6674     static char_u *
6675 echo_string(tv, tofree, numbuf, copyID)
6676     typval_T	*tv;
6677     char_u	**tofree;
6678     char_u	*numbuf;
6679     int		copyID;
6680 {
6681     static int	recurse = 0;
6682     char_u	*r = NULL;
6683 
6684     if (recurse >= DICT_MAXNEST)
6685     {
6686 	EMSG(_("E724: variable nested too deep for displaying"));
6687 	*tofree = NULL;
6688 	return NULL;
6689     }
6690     ++recurse;
6691 
6692     switch (tv->v_type)
6693     {
6694 	case VAR_FUNC:
6695 	    *tofree = NULL;
6696 	    r = tv->vval.v_string;
6697 	    break;
6698 
6699 	case VAR_LIST:
6700 	    if (tv->vval.v_list == NULL)
6701 	    {
6702 		*tofree = NULL;
6703 		r = NULL;
6704 	    }
6705 	    else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID)
6706 	    {
6707 		*tofree = NULL;
6708 		r = (char_u *)"[...]";
6709 	    }
6710 	    else
6711 	    {
6712 		tv->vval.v_list->lv_copyID = copyID;
6713 		*tofree = list2string(tv, copyID);
6714 		r = *tofree;
6715 	    }
6716 	    break;
6717 
6718 	case VAR_DICT:
6719 	    if (tv->vval.v_dict == NULL)
6720 	    {
6721 		*tofree = NULL;
6722 		r = NULL;
6723 	    }
6724 	    else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID)
6725 	    {
6726 		*tofree = NULL;
6727 		r = (char_u *)"{...}";
6728 	    }
6729 	    else
6730 	    {
6731 		tv->vval.v_dict->dv_copyID = copyID;
6732 		*tofree = dict2string(tv, copyID);
6733 		r = *tofree;
6734 	    }
6735 	    break;
6736 
6737 	case VAR_STRING:
6738 	case VAR_NUMBER:
6739 	    *tofree = NULL;
6740 	    r = get_tv_string_buf(tv, numbuf);
6741 	    break;
6742 
6743 	default:
6744 	    EMSG2(_(e_intern2), "echo_string()");
6745 	    *tofree = NULL;
6746     }
6747 
6748     --recurse;
6749     return r;
6750 }
6751 
6752 /*
6753  * Return a string with the string representation of a variable.
6754  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6755  * "numbuf" is used for a number.
6756  * Puts quotes around strings, so that they can be parsed back by eval().
6757  * May return NULL;
6758  */
6759     static char_u *
6760 tv2string(tv, tofree, numbuf, copyID)
6761     typval_T	*tv;
6762     char_u	**tofree;
6763     char_u	*numbuf;
6764     int		copyID;
6765 {
6766     switch (tv->v_type)
6767     {
6768 	case VAR_FUNC:
6769 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6770 	    return *tofree;
6771 	case VAR_STRING:
6772 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6773 	    return *tofree;
6774 	case VAR_NUMBER:
6775 	case VAR_LIST:
6776 	case VAR_DICT:
6777 	    break;
6778 	default:
6779 	    EMSG2(_(e_intern2), "tv2string()");
6780     }
6781     return echo_string(tv, tofree, numbuf, copyID);
6782 }
6783 
6784 /*
6785  * Return string "str" in ' quotes, doubling ' characters.
6786  * If "str" is NULL an empty string is assumed.
6787  * If "function" is TRUE make it function('string').
6788  */
6789     static char_u *
6790 string_quote(str, function)
6791     char_u	*str;
6792     int		function;
6793 {
6794     unsigned	len;
6795     char_u	*p, *r, *s;
6796 
6797     len = (function ? 13 : 3);
6798     if (str != NULL)
6799     {
6800 	len += STRLEN(str);
6801 	for (p = str; *p != NUL; mb_ptr_adv(p))
6802 	    if (*p == '\'')
6803 		++len;
6804     }
6805     s = r = alloc(len);
6806     if (r != NULL)
6807     {
6808 	if (function)
6809 	{
6810 	    STRCPY(r, "function('");
6811 	    r += 10;
6812 	}
6813 	else
6814 	    *r++ = '\'';
6815 	if (str != NULL)
6816 	    for (p = str; *p != NUL; )
6817 	    {
6818 		if (*p == '\'')
6819 		    *r++ = '\'';
6820 		MB_COPY_CHAR(p, r);
6821 	    }
6822 	*r++ = '\'';
6823 	if (function)
6824 	    *r++ = ')';
6825 	*r++ = NUL;
6826     }
6827     return s;
6828 }
6829 
6830 /*
6831  * Get the value of an environment variable.
6832  * "arg" is pointing to the '$'.  It is advanced to after the name.
6833  * If the environment variable was not set, silently assume it is empty.
6834  * Always return OK.
6835  */
6836     static int
6837 get_env_tv(arg, rettv, evaluate)
6838     char_u	**arg;
6839     typval_T	*rettv;
6840     int		evaluate;
6841 {
6842     char_u	*string = NULL;
6843     int		len;
6844     int		cc;
6845     char_u	*name;
6846     int		mustfree = FALSE;
6847 
6848     ++*arg;
6849     name = *arg;
6850     len = get_env_len(arg);
6851     if (evaluate)
6852     {
6853 	if (len != 0)
6854 	{
6855 	    cc = name[len];
6856 	    name[len] = NUL;
6857 	    /* first try vim_getenv(), fast for normal environment vars */
6858 	    string = vim_getenv(name, &mustfree);
6859 	    if (string != NULL && *string != NUL)
6860 	    {
6861 		if (!mustfree)
6862 		    string = vim_strsave(string);
6863 	    }
6864 	    else
6865 	    {
6866 		if (mustfree)
6867 		    vim_free(string);
6868 
6869 		/* next try expanding things like $VIM and ${HOME} */
6870 		string = expand_env_save(name - 1);
6871 		if (string != NULL && *string == '$')
6872 		{
6873 		    vim_free(string);
6874 		    string = NULL;
6875 		}
6876 	    }
6877 	    name[len] = cc;
6878 	}
6879 	rettv->v_type = VAR_STRING;
6880 	rettv->vval.v_string = string;
6881     }
6882 
6883     return OK;
6884 }
6885 
6886 /*
6887  * Array with names and number of arguments of all internal functions
6888  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6889  */
6890 static struct fst
6891 {
6892     char	*f_name;	/* function name */
6893     char	f_min_argc;	/* minimal number of arguments */
6894     char	f_max_argc;	/* maximal number of arguments */
6895     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6896 				/* implemenation of function */
6897 } functions[] =
6898 {
6899     {"add",		2, 2, f_add},
6900     {"append",		2, 2, f_append},
6901     {"argc",		0, 0, f_argc},
6902     {"argidx",		0, 0, f_argidx},
6903     {"argv",		1, 1, f_argv},
6904     {"browse",		4, 4, f_browse},
6905     {"browsedir",	2, 2, f_browsedir},
6906     {"bufexists",	1, 1, f_bufexists},
6907     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6908     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6909     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6910     {"buflisted",	1, 1, f_buflisted},
6911     {"bufloaded",	1, 1, f_bufloaded},
6912     {"bufname",		1, 1, f_bufname},
6913     {"bufnr",		1, 2, f_bufnr},
6914     {"bufwinnr",	1, 1, f_bufwinnr},
6915     {"byte2line",	1, 1, f_byte2line},
6916     {"byteidx",		2, 2, f_byteidx},
6917     {"call",		2, 3, f_call},
6918     {"changenr",	0, 0, f_changenr},
6919     {"char2nr",		1, 1, f_char2nr},
6920     {"cindent",		1, 1, f_cindent},
6921     {"col",		1, 1, f_col},
6922 #if defined(FEAT_INS_EXPAND)
6923     {"complete",	2, 2, f_complete},
6924     {"complete_add",	1, 1, f_complete_add},
6925     {"complete_check",	0, 0, f_complete_check},
6926 #endif
6927     {"confirm",		1, 4, f_confirm},
6928     {"copy",		1, 1, f_copy},
6929     {"count",		2, 4, f_count},
6930     {"cscope_connection",0,3, f_cscope_connection},
6931     {"cursor",		1, 3, f_cursor},
6932     {"deepcopy",	1, 2, f_deepcopy},
6933     {"delete",		1, 1, f_delete},
6934     {"did_filetype",	0, 0, f_did_filetype},
6935     {"diff_filler",	1, 1, f_diff_filler},
6936     {"diff_hlID",	2, 2, f_diff_hlID},
6937     {"empty",		1, 1, f_empty},
6938     {"escape",		2, 2, f_escape},
6939     {"eval",		1, 1, f_eval},
6940     {"eventhandler",	0, 0, f_eventhandler},
6941     {"executable",	1, 1, f_executable},
6942     {"exists",		1, 1, f_exists},
6943     {"expand",		1, 2, f_expand},
6944     {"extend",		2, 3, f_extend},
6945     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6946     {"filereadable",	1, 1, f_filereadable},
6947     {"filewritable",	1, 1, f_filewritable},
6948     {"filter",		2, 2, f_filter},
6949     {"finddir",		1, 3, f_finddir},
6950     {"findfile",	1, 3, f_findfile},
6951     {"fnamemodify",	2, 2, f_fnamemodify},
6952     {"foldclosed",	1, 1, f_foldclosed},
6953     {"foldclosedend",	1, 1, f_foldclosedend},
6954     {"foldlevel",	1, 1, f_foldlevel},
6955     {"foldtext",	0, 0, f_foldtext},
6956     {"foldtextresult",	1, 1, f_foldtextresult},
6957     {"foreground",	0, 0, f_foreground},
6958     {"function",	1, 1, f_function},
6959     {"garbagecollect",	0, 0, f_garbagecollect},
6960     {"get",		2, 3, f_get},
6961     {"getbufline",	2, 3, f_getbufline},
6962     {"getbufvar",	2, 2, f_getbufvar},
6963     {"getchar",		0, 1, f_getchar},
6964     {"getcharmod",	0, 0, f_getcharmod},
6965     {"getcmdline",	0, 0, f_getcmdline},
6966     {"getcmdpos",	0, 0, f_getcmdpos},
6967     {"getcmdtype",	0, 0, f_getcmdtype},
6968     {"getcwd",		0, 0, f_getcwd},
6969     {"getfontname",	0, 1, f_getfontname},
6970     {"getfperm",	1, 1, f_getfperm},
6971     {"getfsize",	1, 1, f_getfsize},
6972     {"getftime",	1, 1, f_getftime},
6973     {"getftype",	1, 1, f_getftype},
6974     {"getline",		1, 2, f_getline},
6975     {"getloclist",	1, 1, f_getqflist},
6976     {"getpos",		1, 1, f_getpos},
6977     {"getqflist",	0, 0, f_getqflist},
6978     {"getreg",		0, 2, f_getreg},
6979     {"getregtype",	0, 1, f_getregtype},
6980     {"getwinposx",	0, 0, f_getwinposx},
6981     {"getwinposy",	0, 0, f_getwinposy},
6982     {"getwinvar",	2, 2, f_getwinvar},
6983     {"glob",		1, 1, f_glob},
6984     {"globpath",	2, 2, f_globpath},
6985     {"has",		1, 1, f_has},
6986     {"has_key",		2, 2, f_has_key},
6987     {"hasmapto",	1, 3, f_hasmapto},
6988     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6989     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6990     {"histadd",		2, 2, f_histadd},
6991     {"histdel",		1, 2, f_histdel},
6992     {"histget",		1, 2, f_histget},
6993     {"histnr",		1, 1, f_histnr},
6994     {"hlID",		1, 1, f_hlID},
6995     {"hlexists",	1, 1, f_hlexists},
6996     {"hostname",	0, 0, f_hostname},
6997     {"iconv",		3, 3, f_iconv},
6998     {"indent",		1, 1, f_indent},
6999     {"index",		2, 4, f_index},
7000     {"input",		1, 3, f_input},
7001     {"inputdialog",	1, 3, f_inputdialog},
7002     {"inputlist",	1, 1, f_inputlist},
7003     {"inputrestore",	0, 0, f_inputrestore},
7004     {"inputsave",	0, 0, f_inputsave},
7005     {"inputsecret",	1, 2, f_inputsecret},
7006     {"insert",		2, 3, f_insert},
7007     {"isdirectory",	1, 1, f_isdirectory},
7008     {"islocked",	1, 1, f_islocked},
7009     {"items",		1, 1, f_items},
7010     {"join",		1, 2, f_join},
7011     {"keys",		1, 1, f_keys},
7012     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
7013     {"len",		1, 1, f_len},
7014     {"libcall",		3, 3, f_libcall},
7015     {"libcallnr",	3, 3, f_libcallnr},
7016     {"line",		1, 1, f_line},
7017     {"line2byte",	1, 1, f_line2byte},
7018     {"lispindent",	1, 1, f_lispindent},
7019     {"localtime",	0, 0, f_localtime},
7020     {"map",		2, 2, f_map},
7021     {"maparg",		1, 3, f_maparg},
7022     {"mapcheck",	1, 3, f_mapcheck},
7023     {"match",		2, 4, f_match},
7024     {"matchend",	2, 4, f_matchend},
7025     {"matchlist",	2, 4, f_matchlist},
7026     {"matchstr",	2, 4, f_matchstr},
7027     {"max",		1, 1, f_max},
7028     {"min",		1, 1, f_min},
7029 #ifdef vim_mkdir
7030     {"mkdir",		1, 3, f_mkdir},
7031 #endif
7032     {"mode",		0, 0, f_mode},
7033     {"nextnonblank",	1, 1, f_nextnonblank},
7034     {"nr2char",		1, 1, f_nr2char},
7035     {"prevnonblank",	1, 1, f_prevnonblank},
7036     {"printf",		2, 19, f_printf},
7037     {"pumvisible",	0, 0, f_pumvisible},
7038     {"range",		1, 3, f_range},
7039     {"readfile",	1, 3, f_readfile},
7040     {"reltime",		0, 2, f_reltime},
7041     {"reltimestr",	1, 1, f_reltimestr},
7042     {"remote_expr",	2, 3, f_remote_expr},
7043     {"remote_foreground", 1, 1, f_remote_foreground},
7044     {"remote_peek",	1, 2, f_remote_peek},
7045     {"remote_read",	1, 1, f_remote_read},
7046     {"remote_send",	2, 3, f_remote_send},
7047     {"remove",		2, 3, f_remove},
7048     {"rename",		2, 2, f_rename},
7049     {"repeat",		2, 2, f_repeat},
7050     {"resolve",		1, 1, f_resolve},
7051     {"reverse",		1, 1, f_reverse},
7052     {"search",		1, 3, f_search},
7053     {"searchdecl",	1, 3, f_searchdecl},
7054     {"searchpair",	3, 6, f_searchpair},
7055     {"searchpairpos",	3, 6, f_searchpairpos},
7056     {"searchpos",	1, 3, f_searchpos},
7057     {"server2client",	2, 2, f_server2client},
7058     {"serverlist",	0, 0, f_serverlist},
7059     {"setbufvar",	3, 3, f_setbufvar},
7060     {"setcmdpos",	1, 1, f_setcmdpos},
7061     {"setline",		2, 2, f_setline},
7062     {"setloclist",	2, 3, f_setloclist},
7063     {"setpos",		2, 2, f_setpos},
7064     {"setqflist",	1, 2, f_setqflist},
7065     {"setreg",		2, 3, f_setreg},
7066     {"setwinvar",	3, 3, f_setwinvar},
7067     {"simplify",	1, 1, f_simplify},
7068     {"sort",		1, 2, f_sort},
7069     {"soundfold",	1, 1, f_soundfold},
7070     {"spellbadword",	0, 1, f_spellbadword},
7071     {"spellsuggest",	1, 3, f_spellsuggest},
7072     {"split",		1, 3, f_split},
7073     {"str2nr",		1, 2, f_str2nr},
7074 #ifdef HAVE_STRFTIME
7075     {"strftime",	1, 2, f_strftime},
7076 #endif
7077     {"stridx",		2, 3, f_stridx},
7078     {"string",		1, 1, f_string},
7079     {"strlen",		1, 1, f_strlen},
7080     {"strpart",		2, 3, f_strpart},
7081     {"strridx",		2, 3, f_strridx},
7082     {"strtrans",	1, 1, f_strtrans},
7083     {"submatch",	1, 1, f_submatch},
7084     {"substitute",	4, 4, f_substitute},
7085     {"synID",		3, 3, f_synID},
7086     {"synIDattr",	2, 3, f_synIDattr},
7087     {"synIDtrans",	1, 1, f_synIDtrans},
7088     {"system",		1, 2, f_system},
7089     {"tabpagebuflist",	0, 1, f_tabpagebuflist},
7090     {"tabpagenr",	0, 1, f_tabpagenr},
7091     {"tabpagewinnr",	1, 2, f_tabpagewinnr},
7092     {"tagfiles",	0, 0, f_tagfiles},
7093     {"taglist",		1, 1, f_taglist},
7094     {"tempname",	0, 0, f_tempname},
7095     {"test",		1, 1, f_test},
7096     {"tolower",		1, 1, f_tolower},
7097     {"toupper",		1, 1, f_toupper},
7098     {"tr",		3, 3, f_tr},
7099     {"type",		1, 1, f_type},
7100     {"values",		1, 1, f_values},
7101     {"virtcol",		1, 1, f_virtcol},
7102     {"visualmode",	0, 1, f_visualmode},
7103     {"winbufnr",	1, 1, f_winbufnr},
7104     {"wincol",		0, 0, f_wincol},
7105     {"winheight",	1, 1, f_winheight},
7106     {"winline",		0, 0, f_winline},
7107     {"winnr",		0, 1, f_winnr},
7108     {"winrestcmd",	0, 0, f_winrestcmd},
7109     {"winrestview",	1, 1, f_winrestview},
7110     {"winsaveview",	0, 0, f_winsaveview},
7111     {"winwidth",	1, 1, f_winwidth},
7112     {"writefile",	2, 3, f_writefile},
7113 };
7114 
7115 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
7116 
7117 /*
7118  * Function given to ExpandGeneric() to obtain the list of internal
7119  * or user defined function names.
7120  */
7121     char_u *
7122 get_function_name(xp, idx)
7123     expand_T	*xp;
7124     int		idx;
7125 {
7126     static int	intidx = -1;
7127     char_u	*name;
7128 
7129     if (idx == 0)
7130 	intidx = -1;
7131     if (intidx < 0)
7132     {
7133 	name = get_user_func_name(xp, idx);
7134 	if (name != NULL)
7135 	    return name;
7136     }
7137     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
7138     {
7139 	STRCPY(IObuff, functions[intidx].f_name);
7140 	STRCAT(IObuff, "(");
7141 	if (functions[intidx].f_max_argc == 0)
7142 	    STRCAT(IObuff, ")");
7143 	return IObuff;
7144     }
7145 
7146     return NULL;
7147 }
7148 
7149 /*
7150  * Function given to ExpandGeneric() to obtain the list of internal or
7151  * user defined variable or function names.
7152  */
7153 /*ARGSUSED*/
7154     char_u *
7155 get_expr_name(xp, idx)
7156     expand_T	*xp;
7157     int		idx;
7158 {
7159     static int	intidx = -1;
7160     char_u	*name;
7161 
7162     if (idx == 0)
7163 	intidx = -1;
7164     if (intidx < 0)
7165     {
7166 	name = get_function_name(xp, idx);
7167 	if (name != NULL)
7168 	    return name;
7169     }
7170     return get_user_var_name(xp, ++intidx);
7171 }
7172 
7173 #endif /* FEAT_CMDL_COMPL */
7174 
7175 /*
7176  * Find internal function in table above.
7177  * Return index, or -1 if not found
7178  */
7179     static int
7180 find_internal_func(name)
7181     char_u	*name;		/* name of the function */
7182 {
7183     int		first = 0;
7184     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
7185     int		cmp;
7186     int		x;
7187 
7188     /*
7189      * Find the function name in the table. Binary search.
7190      */
7191     while (first <= last)
7192     {
7193 	x = first + ((unsigned)(last - first) >> 1);
7194 	cmp = STRCMP(name, functions[x].f_name);
7195 	if (cmp < 0)
7196 	    last = x - 1;
7197 	else if (cmp > 0)
7198 	    first = x + 1;
7199 	else
7200 	    return x;
7201     }
7202     return -1;
7203 }
7204 
7205 /*
7206  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
7207  * name it contains, otherwise return "name".
7208  */
7209     static char_u *
7210 deref_func_name(name, lenp)
7211     char_u	*name;
7212     int		*lenp;
7213 {
7214     dictitem_T	*v;
7215     int		cc;
7216 
7217     cc = name[*lenp];
7218     name[*lenp] = NUL;
7219     v = find_var(name, NULL);
7220     name[*lenp] = cc;
7221     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
7222     {
7223 	if (v->di_tv.vval.v_string == NULL)
7224 	{
7225 	    *lenp = 0;
7226 	    return (char_u *)"";	/* just in case */
7227 	}
7228 	*lenp = STRLEN(v->di_tv.vval.v_string);
7229 	return v->di_tv.vval.v_string;
7230     }
7231 
7232     return name;
7233 }
7234 
7235 /*
7236  * Allocate a variable for the result of a function.
7237  * Return OK or FAIL.
7238  */
7239     static int
7240 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
7241 							   evaluate, selfdict)
7242     char_u	*name;		/* name of the function */
7243     int		len;		/* length of "name" */
7244     typval_T	*rettv;
7245     char_u	**arg;		/* argument, pointing to the '(' */
7246     linenr_T	firstline;	/* first line of range */
7247     linenr_T	lastline;	/* last line of range */
7248     int		*doesrange;	/* return: function handled range */
7249     int		evaluate;
7250     dict_T	*selfdict;	/* Dictionary for "self" */
7251 {
7252     char_u	*argp;
7253     int		ret = OK;
7254     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7255     int		argcount = 0;		/* number of arguments found */
7256 
7257     /*
7258      * Get the arguments.
7259      */
7260     argp = *arg;
7261     while (argcount < MAX_FUNC_ARGS)
7262     {
7263 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7264 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7265 	    break;
7266 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7267 	{
7268 	    ret = FAIL;
7269 	    break;
7270 	}
7271 	++argcount;
7272 	if (*argp != ',')
7273 	    break;
7274     }
7275     if (*argp == ')')
7276 	++argp;
7277     else
7278 	ret = FAIL;
7279 
7280     if (ret == OK)
7281 	ret = call_func(name, len, rettv, argcount, argvars,
7282 			  firstline, lastline, doesrange, evaluate, selfdict);
7283     else if (!aborting())
7284     {
7285 	if (argcount == MAX_FUNC_ARGS)
7286 	    emsg_funcname("E740: Too many arguments for function %s", name);
7287 	else
7288 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7289     }
7290 
7291     while (--argcount >= 0)
7292 	clear_tv(&argvars[argcount]);
7293 
7294     *arg = skipwhite(argp);
7295     return ret;
7296 }
7297 
7298 
7299 /*
7300  * Call a function with its resolved parameters
7301  * Return OK when the function can't be called,  FAIL otherwise.
7302  * Also returns OK when an error was encountered while executing the function.
7303  */
7304     static int
7305 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7306 						doesrange, evaluate, selfdict)
7307     char_u	*name;		/* name of the function */
7308     int		len;		/* length of "name" */
7309     typval_T	*rettv;		/* return value goes here */
7310     int		argcount;	/* number of "argvars" */
7311     typval_T	*argvars;	/* vars for arguments */
7312     linenr_T	firstline;	/* first line of range */
7313     linenr_T	lastline;	/* last line of range */
7314     int		*doesrange;	/* return: function handled range */
7315     int		evaluate;
7316     dict_T	*selfdict;	/* Dictionary for "self" */
7317 {
7318     int		ret = FAIL;
7319 #define ERROR_UNKNOWN	0
7320 #define ERROR_TOOMANY	1
7321 #define ERROR_TOOFEW	2
7322 #define ERROR_SCRIPT	3
7323 #define ERROR_DICT	4
7324 #define ERROR_NONE	5
7325 #define ERROR_OTHER	6
7326     int		error = ERROR_NONE;
7327     int		i;
7328     int		llen;
7329     ufunc_T	*fp;
7330     int		cc;
7331 #define FLEN_FIXED 40
7332     char_u	fname_buf[FLEN_FIXED + 1];
7333     char_u	*fname;
7334 
7335     /*
7336      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7337      * Change <SNR>123_name() to K_SNR 123_name().
7338      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7339      */
7340     cc = name[len];
7341     name[len] = NUL;
7342     llen = eval_fname_script(name);
7343     if (llen > 0)
7344     {
7345 	fname_buf[0] = K_SPECIAL;
7346 	fname_buf[1] = KS_EXTRA;
7347 	fname_buf[2] = (int)KE_SNR;
7348 	i = 3;
7349 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7350 	{
7351 	    if (current_SID <= 0)
7352 		error = ERROR_SCRIPT;
7353 	    else
7354 	    {
7355 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7356 		i = (int)STRLEN(fname_buf);
7357 	    }
7358 	}
7359 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7360 	{
7361 	    STRCPY(fname_buf + i, name + llen);
7362 	    fname = fname_buf;
7363 	}
7364 	else
7365 	{
7366 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7367 	    if (fname == NULL)
7368 		error = ERROR_OTHER;
7369 	    else
7370 	    {
7371 		mch_memmove(fname, fname_buf, (size_t)i);
7372 		STRCPY(fname + i, name + llen);
7373 	    }
7374 	}
7375     }
7376     else
7377 	fname = name;
7378 
7379     *doesrange = FALSE;
7380 
7381 
7382     /* execute the function if no errors detected and executing */
7383     if (evaluate && error == ERROR_NONE)
7384     {
7385 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7386 	error = ERROR_UNKNOWN;
7387 
7388 	if (!builtin_function(fname))
7389 	{
7390 	    /*
7391 	     * User defined function.
7392 	     */
7393 	    fp = find_func(fname);
7394 
7395 #ifdef FEAT_AUTOCMD
7396 	    /* Trigger FuncUndefined event, may load the function. */
7397 	    if (fp == NULL
7398 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7399 						     fname, fname, TRUE, NULL)
7400 		    && !aborting())
7401 	    {
7402 		/* executed an autocommand, search for the function again */
7403 		fp = find_func(fname);
7404 	    }
7405 #endif
7406 	    /* Try loading a package. */
7407 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7408 	    {
7409 		/* loaded a package, search for the function again */
7410 		fp = find_func(fname);
7411 	    }
7412 
7413 	    if (fp != NULL)
7414 	    {
7415 		if (fp->uf_flags & FC_RANGE)
7416 		    *doesrange = TRUE;
7417 		if (argcount < fp->uf_args.ga_len)
7418 		    error = ERROR_TOOFEW;
7419 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7420 		    error = ERROR_TOOMANY;
7421 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7422 		    error = ERROR_DICT;
7423 		else
7424 		{
7425 		    /*
7426 		     * Call the user function.
7427 		     * Save and restore search patterns, script variables and
7428 		     * redo buffer.
7429 		     */
7430 		    save_search_patterns();
7431 		    saveRedobuff();
7432 		    ++fp->uf_calls;
7433 		    call_user_func(fp, argcount, argvars, rettv,
7434 					       firstline, lastline,
7435 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7436 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7437 						      && fp->uf_refcount <= 0)
7438 			/* Function was unreferenced while being used, free it
7439 			 * now. */
7440 			func_free(fp);
7441 		    restoreRedobuff();
7442 		    restore_search_patterns();
7443 		    error = ERROR_NONE;
7444 		}
7445 	    }
7446 	}
7447 	else
7448 	{
7449 	    /*
7450 	     * Find the function name in the table, call its implementation.
7451 	     */
7452 	    i = find_internal_func(fname);
7453 	    if (i >= 0)
7454 	    {
7455 		if (argcount < functions[i].f_min_argc)
7456 		    error = ERROR_TOOFEW;
7457 		else if (argcount > functions[i].f_max_argc)
7458 		    error = ERROR_TOOMANY;
7459 		else
7460 		{
7461 		    argvars[argcount].v_type = VAR_UNKNOWN;
7462 		    functions[i].f_func(argvars, rettv);
7463 		    error = ERROR_NONE;
7464 		}
7465 	    }
7466 	}
7467 	/*
7468 	 * The function call (or "FuncUndefined" autocommand sequence) might
7469 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7470 	 * exception that has not been caught so far.  This situation can be
7471 	 * tested for by calling aborting().  For an error in an internal
7472 	 * function or for the "E132" error in call_user_func(), however, the
7473 	 * throw point at which the "force_abort" flag (temporarily reset by
7474 	 * emsg()) is normally updated has not been reached yet. We need to
7475 	 * update that flag first to make aborting() reliable.
7476 	 */
7477 	update_force_abort();
7478     }
7479     if (error == ERROR_NONE)
7480 	ret = OK;
7481 
7482     /*
7483      * Report an error unless the argument evaluation or function call has been
7484      * cancelled due to an aborting error, an interrupt, or an exception.
7485      */
7486     if (!aborting())
7487     {
7488 	switch (error)
7489 	{
7490 	    case ERROR_UNKNOWN:
7491 		    emsg_funcname("E117: Unknown function: %s", name);
7492 		    break;
7493 	    case ERROR_TOOMANY:
7494 		    emsg_funcname(e_toomanyarg, name);
7495 		    break;
7496 	    case ERROR_TOOFEW:
7497 		    emsg_funcname("E119: Not enough arguments for function: %s",
7498 									name);
7499 		    break;
7500 	    case ERROR_SCRIPT:
7501 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7502 									name);
7503 		    break;
7504 	    case ERROR_DICT:
7505 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7506 									name);
7507 		    break;
7508 	}
7509     }
7510 
7511     name[len] = cc;
7512     if (fname != name && fname != fname_buf)
7513 	vim_free(fname);
7514 
7515     return ret;
7516 }
7517 
7518 /*
7519  * Give an error message with a function name.  Handle <SNR> things.
7520  */
7521     static void
7522 emsg_funcname(msg, name)
7523     char	*msg;
7524     char_u	*name;
7525 {
7526     char_u	*p;
7527 
7528     if (*name == K_SPECIAL)
7529 	p = concat_str((char_u *)"<SNR>", name + 3);
7530     else
7531 	p = name;
7532     EMSG2(_(msg), p);
7533     if (p != name)
7534 	vim_free(p);
7535 }
7536 
7537 /*********************************************
7538  * Implementation of the built-in functions
7539  */
7540 
7541 /*
7542  * "add(list, item)" function
7543  */
7544     static void
7545 f_add(argvars, rettv)
7546     typval_T	*argvars;
7547     typval_T	*rettv;
7548 {
7549     list_T	*l;
7550 
7551     rettv->vval.v_number = 1; /* Default: Failed */
7552     if (argvars[0].v_type == VAR_LIST)
7553     {
7554 	if ((l = argvars[0].vval.v_list) != NULL
7555 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7556 		&& list_append_tv(l, &argvars[1]) == OK)
7557 	    copy_tv(&argvars[0], rettv);
7558     }
7559     else
7560 	EMSG(_(e_listreq));
7561 }
7562 
7563 /*
7564  * "append(lnum, string/list)" function
7565  */
7566     static void
7567 f_append(argvars, rettv)
7568     typval_T	*argvars;
7569     typval_T	*rettv;
7570 {
7571     long	lnum;
7572     char_u	*line;
7573     list_T	*l = NULL;
7574     listitem_T	*li = NULL;
7575     typval_T	*tv;
7576     long	added = 0;
7577 
7578     lnum = get_tv_lnum(argvars);
7579     if (lnum >= 0
7580 	    && lnum <= curbuf->b_ml.ml_line_count
7581 	    && u_save(lnum, lnum + 1) == OK)
7582     {
7583 	if (argvars[1].v_type == VAR_LIST)
7584 	{
7585 	    l = argvars[1].vval.v_list;
7586 	    if (l == NULL)
7587 		return;
7588 	    li = l->lv_first;
7589 	}
7590 	rettv->vval.v_number = 0;	/* Default: Success */
7591 	for (;;)
7592 	{
7593 	    if (l == NULL)
7594 		tv = &argvars[1];	/* append a string */
7595 	    else if (li == NULL)
7596 		break;			/* end of list */
7597 	    else
7598 		tv = &li->li_tv;	/* append item from list */
7599 	    line = get_tv_string_chk(tv);
7600 	    if (line == NULL)		/* type error */
7601 	    {
7602 		rettv->vval.v_number = 1;	/* Failed */
7603 		break;
7604 	    }
7605 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7606 	    ++added;
7607 	    if (l == NULL)
7608 		break;
7609 	    li = li->li_next;
7610 	}
7611 
7612 	appended_lines_mark(lnum, added);
7613 	if (curwin->w_cursor.lnum > lnum)
7614 	    curwin->w_cursor.lnum += added;
7615     }
7616     else
7617 	rettv->vval.v_number = 1;	/* Failed */
7618 }
7619 
7620 /*
7621  * "argc()" function
7622  */
7623 /* ARGSUSED */
7624     static void
7625 f_argc(argvars, rettv)
7626     typval_T	*argvars;
7627     typval_T	*rettv;
7628 {
7629     rettv->vval.v_number = ARGCOUNT;
7630 }
7631 
7632 /*
7633  * "argidx()" function
7634  */
7635 /* ARGSUSED */
7636     static void
7637 f_argidx(argvars, rettv)
7638     typval_T	*argvars;
7639     typval_T	*rettv;
7640 {
7641     rettv->vval.v_number = curwin->w_arg_idx;
7642 }
7643 
7644 /*
7645  * "argv(nr)" function
7646  */
7647     static void
7648 f_argv(argvars, rettv)
7649     typval_T	*argvars;
7650     typval_T	*rettv;
7651 {
7652     int		idx;
7653 
7654     idx = get_tv_number_chk(&argvars[0], NULL);
7655     if (idx >= 0 && idx < ARGCOUNT)
7656 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7657     else
7658 	rettv->vval.v_string = NULL;
7659     rettv->v_type = VAR_STRING;
7660 }
7661 
7662 /*
7663  * "browse(save, title, initdir, default)" function
7664  */
7665 /* ARGSUSED */
7666     static void
7667 f_browse(argvars, rettv)
7668     typval_T	*argvars;
7669     typval_T	*rettv;
7670 {
7671 #ifdef FEAT_BROWSE
7672     int		save;
7673     char_u	*title;
7674     char_u	*initdir;
7675     char_u	*defname;
7676     char_u	buf[NUMBUFLEN];
7677     char_u	buf2[NUMBUFLEN];
7678     int		error = FALSE;
7679 
7680     save = get_tv_number_chk(&argvars[0], &error);
7681     title = get_tv_string_chk(&argvars[1]);
7682     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7683     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7684 
7685     if (error || title == NULL || initdir == NULL || defname == NULL)
7686 	rettv->vval.v_string = NULL;
7687     else
7688 	rettv->vval.v_string =
7689 		 do_browse(save ? BROWSE_SAVE : 0,
7690 				 title, defname, NULL, initdir, NULL, curbuf);
7691 #else
7692     rettv->vval.v_string = NULL;
7693 #endif
7694     rettv->v_type = VAR_STRING;
7695 }
7696 
7697 /*
7698  * "browsedir(title, initdir)" function
7699  */
7700 /* ARGSUSED */
7701     static void
7702 f_browsedir(argvars, rettv)
7703     typval_T	*argvars;
7704     typval_T	*rettv;
7705 {
7706 #ifdef FEAT_BROWSE
7707     char_u	*title;
7708     char_u	*initdir;
7709     char_u	buf[NUMBUFLEN];
7710 
7711     title = get_tv_string_chk(&argvars[0]);
7712     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7713 
7714     if (title == NULL || initdir == NULL)
7715 	rettv->vval.v_string = NULL;
7716     else
7717 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7718 				    title, NULL, NULL, initdir, NULL, curbuf);
7719 #else
7720     rettv->vval.v_string = NULL;
7721 #endif
7722     rettv->v_type = VAR_STRING;
7723 }
7724 
7725 static buf_T *find_buffer __ARGS((typval_T *avar));
7726 
7727 /*
7728  * Find a buffer by number or exact name.
7729  */
7730     static buf_T *
7731 find_buffer(avar)
7732     typval_T	*avar;
7733 {
7734     buf_T	*buf = NULL;
7735 
7736     if (avar->v_type == VAR_NUMBER)
7737 	buf = buflist_findnr((int)avar->vval.v_number);
7738     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7739     {
7740 	buf = buflist_findname_exp(avar->vval.v_string);
7741 	if (buf == NULL)
7742 	{
7743 	    /* No full path name match, try a match with a URL or a "nofile"
7744 	     * buffer, these don't use the full path. */
7745 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7746 		if (buf->b_fname != NULL
7747 			&& (path_with_url(buf->b_fname)
7748 #ifdef FEAT_QUICKFIX
7749 			    || bt_nofile(buf)
7750 #endif
7751 			   )
7752 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7753 		    break;
7754 	}
7755     }
7756     return buf;
7757 }
7758 
7759 /*
7760  * "bufexists(expr)" function
7761  */
7762     static void
7763 f_bufexists(argvars, rettv)
7764     typval_T	*argvars;
7765     typval_T	*rettv;
7766 {
7767     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7768 }
7769 
7770 /*
7771  * "buflisted(expr)" function
7772  */
7773     static void
7774 f_buflisted(argvars, rettv)
7775     typval_T	*argvars;
7776     typval_T	*rettv;
7777 {
7778     buf_T	*buf;
7779 
7780     buf = find_buffer(&argvars[0]);
7781     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7782 }
7783 
7784 /*
7785  * "bufloaded(expr)" function
7786  */
7787     static void
7788 f_bufloaded(argvars, rettv)
7789     typval_T	*argvars;
7790     typval_T	*rettv;
7791 {
7792     buf_T	*buf;
7793 
7794     buf = find_buffer(&argvars[0]);
7795     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7796 }
7797 
7798 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7799 
7800 /*
7801  * Get buffer by number or pattern.
7802  */
7803     static buf_T *
7804 get_buf_tv(tv)
7805     typval_T	*tv;
7806 {
7807     char_u	*name = tv->vval.v_string;
7808     int		save_magic;
7809     char_u	*save_cpo;
7810     buf_T	*buf;
7811 
7812     if (tv->v_type == VAR_NUMBER)
7813 	return buflist_findnr((int)tv->vval.v_number);
7814     if (tv->v_type != VAR_STRING)
7815 	return NULL;
7816     if (name == NULL || *name == NUL)
7817 	return curbuf;
7818     if (name[0] == '$' && name[1] == NUL)
7819 	return lastbuf;
7820 
7821     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7822     save_magic = p_magic;
7823     p_magic = TRUE;
7824     save_cpo = p_cpo;
7825     p_cpo = (char_u *)"";
7826 
7827     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7828 								TRUE, FALSE));
7829 
7830     p_magic = save_magic;
7831     p_cpo = save_cpo;
7832 
7833     /* If not found, try expanding the name, like done for bufexists(). */
7834     if (buf == NULL)
7835 	buf = find_buffer(tv);
7836 
7837     return buf;
7838 }
7839 
7840 /*
7841  * "bufname(expr)" function
7842  */
7843     static void
7844 f_bufname(argvars, rettv)
7845     typval_T	*argvars;
7846     typval_T	*rettv;
7847 {
7848     buf_T	*buf;
7849 
7850     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7851     ++emsg_off;
7852     buf = get_buf_tv(&argvars[0]);
7853     rettv->v_type = VAR_STRING;
7854     if (buf != NULL && buf->b_fname != NULL)
7855 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7856     else
7857 	rettv->vval.v_string = NULL;
7858     --emsg_off;
7859 }
7860 
7861 /*
7862  * "bufnr(expr)" function
7863  */
7864     static void
7865 f_bufnr(argvars, rettv)
7866     typval_T	*argvars;
7867     typval_T	*rettv;
7868 {
7869     buf_T	*buf;
7870     int		error = FALSE;
7871     char_u	*name;
7872 
7873     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7874     ++emsg_off;
7875     buf = get_buf_tv(&argvars[0]);
7876     --emsg_off;
7877 
7878     /* If the buffer isn't found and the second argument is not zero create a
7879      * new buffer. */
7880     if (buf == NULL
7881 	    && argvars[1].v_type != VAR_UNKNOWN
7882 	    && get_tv_number_chk(&argvars[1], &error) != 0
7883 	    && !error
7884 	    && (name = get_tv_string_chk(&argvars[0])) != NULL
7885 	    && !error)
7886 	buf = buflist_new(name, NULL, (linenr_T)1, 0);
7887 
7888     if (buf != NULL)
7889 	rettv->vval.v_number = buf->b_fnum;
7890     else
7891 	rettv->vval.v_number = -1;
7892 }
7893 
7894 /*
7895  * "bufwinnr(nr)" function
7896  */
7897     static void
7898 f_bufwinnr(argvars, rettv)
7899     typval_T	*argvars;
7900     typval_T	*rettv;
7901 {
7902 #ifdef FEAT_WINDOWS
7903     win_T	*wp;
7904     int		winnr = 0;
7905 #endif
7906     buf_T	*buf;
7907 
7908     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7909     ++emsg_off;
7910     buf = get_buf_tv(&argvars[0]);
7911 #ifdef FEAT_WINDOWS
7912     for (wp = firstwin; wp; wp = wp->w_next)
7913     {
7914 	++winnr;
7915 	if (wp->w_buffer == buf)
7916 	    break;
7917     }
7918     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7919 #else
7920     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7921 #endif
7922     --emsg_off;
7923 }
7924 
7925 /*
7926  * "byte2line(byte)" function
7927  */
7928 /*ARGSUSED*/
7929     static void
7930 f_byte2line(argvars, rettv)
7931     typval_T	*argvars;
7932     typval_T	*rettv;
7933 {
7934 #ifndef FEAT_BYTEOFF
7935     rettv->vval.v_number = -1;
7936 #else
7937     long	boff = 0;
7938 
7939     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7940     if (boff < 0)
7941 	rettv->vval.v_number = -1;
7942     else
7943 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7944 							  (linenr_T)0, &boff);
7945 #endif
7946 }
7947 
7948 /*
7949  * "byteidx()" function
7950  */
7951 /*ARGSUSED*/
7952     static void
7953 f_byteidx(argvars, rettv)
7954     typval_T	*argvars;
7955     typval_T	*rettv;
7956 {
7957 #ifdef FEAT_MBYTE
7958     char_u	*t;
7959 #endif
7960     char_u	*str;
7961     long	idx;
7962 
7963     str = get_tv_string_chk(&argvars[0]);
7964     idx = get_tv_number_chk(&argvars[1], NULL);
7965     rettv->vval.v_number = -1;
7966     if (str == NULL || idx < 0)
7967 	return;
7968 
7969 #ifdef FEAT_MBYTE
7970     t = str;
7971     for ( ; idx > 0; idx--)
7972     {
7973 	if (*t == NUL)		/* EOL reached */
7974 	    return;
7975 	t += (*mb_ptr2len)(t);
7976     }
7977     rettv->vval.v_number = t - str;
7978 #else
7979     if (idx <= STRLEN(str))
7980 	rettv->vval.v_number = idx;
7981 #endif
7982 }
7983 
7984 /*
7985  * "call(func, arglist)" function
7986  */
7987     static void
7988 f_call(argvars, rettv)
7989     typval_T	*argvars;
7990     typval_T	*rettv;
7991 {
7992     char_u	*func;
7993     typval_T	argv[MAX_FUNC_ARGS];
7994     int		argc = 0;
7995     listitem_T	*item;
7996     int		dummy;
7997     dict_T	*selfdict = NULL;
7998 
7999     rettv->vval.v_number = 0;
8000     if (argvars[1].v_type != VAR_LIST)
8001     {
8002 	EMSG(_(e_listreq));
8003 	return;
8004     }
8005     if (argvars[1].vval.v_list == NULL)
8006 	return;
8007 
8008     if (argvars[0].v_type == VAR_FUNC)
8009 	func = argvars[0].vval.v_string;
8010     else
8011 	func = get_tv_string(&argvars[0]);
8012     if (*func == NUL)
8013 	return;		/* type error or empty name */
8014 
8015     if (argvars[2].v_type != VAR_UNKNOWN)
8016     {
8017 	if (argvars[2].v_type != VAR_DICT)
8018 	{
8019 	    EMSG(_(e_dictreq));
8020 	    return;
8021 	}
8022 	selfdict = argvars[2].vval.v_dict;
8023     }
8024 
8025     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
8026 							 item = item->li_next)
8027     {
8028 	if (argc == MAX_FUNC_ARGS)
8029 	{
8030 	    EMSG(_("E699: Too many arguments"));
8031 	    break;
8032 	}
8033 	/* Make a copy of each argument.  This is needed to be able to set
8034 	 * v_lock to VAR_FIXED in the copy without changing the original list.
8035 	 */
8036 	copy_tv(&item->li_tv, &argv[argc++]);
8037     }
8038 
8039     if (item == NULL)
8040 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
8041 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
8042 						      &dummy, TRUE, selfdict);
8043 
8044     /* Free the arguments. */
8045     while (argc > 0)
8046 	clear_tv(&argv[--argc]);
8047 }
8048 
8049 /*
8050  * "changenr()" function
8051  */
8052 /*ARGSUSED*/
8053     static void
8054 f_changenr(argvars, rettv)
8055     typval_T	*argvars;
8056     typval_T	*rettv;
8057 {
8058     rettv->vval.v_number = curbuf->b_u_seq_cur;
8059 }
8060 
8061 /*
8062  * "char2nr(string)" function
8063  */
8064     static void
8065 f_char2nr(argvars, rettv)
8066     typval_T	*argvars;
8067     typval_T	*rettv;
8068 {
8069 #ifdef FEAT_MBYTE
8070     if (has_mbyte)
8071 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
8072     else
8073 #endif
8074     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
8075 }
8076 
8077 /*
8078  * "cindent(lnum)" function
8079  */
8080     static void
8081 f_cindent(argvars, rettv)
8082     typval_T	*argvars;
8083     typval_T	*rettv;
8084 {
8085 #ifdef FEAT_CINDENT
8086     pos_T	pos;
8087     linenr_T	lnum;
8088 
8089     pos = curwin->w_cursor;
8090     lnum = get_tv_lnum(argvars);
8091     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8092     {
8093 	curwin->w_cursor.lnum = lnum;
8094 	rettv->vval.v_number = get_c_indent();
8095 	curwin->w_cursor = pos;
8096     }
8097     else
8098 #endif
8099 	rettv->vval.v_number = -1;
8100 }
8101 
8102 /*
8103  * "col(string)" function
8104  */
8105     static void
8106 f_col(argvars, rettv)
8107     typval_T	*argvars;
8108     typval_T	*rettv;
8109 {
8110     colnr_T	col = 0;
8111     pos_T	*fp;
8112     int		fnum = curbuf->b_fnum;
8113 
8114     fp = var2fpos(&argvars[0], FALSE, &fnum);
8115     if (fp != NULL && fnum == curbuf->b_fnum)
8116     {
8117 	if (fp->col == MAXCOL)
8118 	{
8119 	    /* '> can be MAXCOL, get the length of the line then */
8120 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
8121 		col = STRLEN(ml_get(fp->lnum)) + 1;
8122 	    else
8123 		col = MAXCOL;
8124 	}
8125 	else
8126 	{
8127 	    col = fp->col + 1;
8128 #ifdef FEAT_VIRTUALEDIT
8129 	    /* col(".") when the cursor is on the NUL at the end of the line
8130 	     * because of "coladd" can be seen as an extra column. */
8131 	    if (virtual_active() && fp == &curwin->w_cursor)
8132 	    {
8133 		char_u	*p = ml_get_cursor();
8134 
8135 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
8136 				 curwin->w_virtcol - curwin->w_cursor.coladd))
8137 		{
8138 # ifdef FEAT_MBYTE
8139 		    int		l;
8140 
8141 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
8142 			col += l;
8143 # else
8144 		    if (*p != NUL && p[1] == NUL)
8145 			++col;
8146 # endif
8147 		}
8148 	    }
8149 #endif
8150 	}
8151     }
8152     rettv->vval.v_number = col;
8153 }
8154 
8155 #if defined(FEAT_INS_EXPAND)
8156 /*
8157  * "complete()" function
8158  */
8159 /*ARGSUSED*/
8160     static void
8161 f_complete(argvars, rettv)
8162     typval_T	*argvars;
8163     typval_T	*rettv;
8164 {
8165     int	    startcol;
8166 
8167     if ((State & INSERT) == 0)
8168     {
8169 	EMSG(_("E785: complete() can only be used in Insert mode"));
8170 	return;
8171     }
8172     if (argvars[1].v_type != VAR_LIST || argvars[1].vval.v_list == NULL)
8173     {
8174 	EMSG(_(e_invarg));
8175 	return;
8176     }
8177 
8178     startcol = get_tv_number_chk(&argvars[0], NULL);
8179     if (startcol <= 0)
8180 	return;
8181 
8182     set_completion(startcol - 1, argvars[1].vval.v_list);
8183 }
8184 
8185 /*
8186  * "complete_add()" function
8187  */
8188 /*ARGSUSED*/
8189     static void
8190 f_complete_add(argvars, rettv)
8191     typval_T	*argvars;
8192     typval_T	*rettv;
8193 {
8194     rettv->vval.v_number = ins_compl_add_tv(&argvars[0], 0);
8195 }
8196 
8197 /*
8198  * "complete_check()" function
8199  */
8200 /*ARGSUSED*/
8201     static void
8202 f_complete_check(argvars, rettv)
8203     typval_T	*argvars;
8204     typval_T	*rettv;
8205 {
8206     int		saved = RedrawingDisabled;
8207 
8208     RedrawingDisabled = 0;
8209     ins_compl_check_keys(0);
8210     rettv->vval.v_number = compl_interrupted;
8211     RedrawingDisabled = saved;
8212 }
8213 #endif
8214 
8215 /*
8216  * "confirm(message, buttons[, default [, type]])" function
8217  */
8218 /*ARGSUSED*/
8219     static void
8220 f_confirm(argvars, rettv)
8221     typval_T	*argvars;
8222     typval_T	*rettv;
8223 {
8224 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
8225     char_u	*message;
8226     char_u	*buttons = NULL;
8227     char_u	buf[NUMBUFLEN];
8228     char_u	buf2[NUMBUFLEN];
8229     int		def = 1;
8230     int		type = VIM_GENERIC;
8231     char_u	*typestr;
8232     int		error = FALSE;
8233 
8234     message = get_tv_string_chk(&argvars[0]);
8235     if (message == NULL)
8236 	error = TRUE;
8237     if (argvars[1].v_type != VAR_UNKNOWN)
8238     {
8239 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
8240 	if (buttons == NULL)
8241 	    error = TRUE;
8242 	if (argvars[2].v_type != VAR_UNKNOWN)
8243 	{
8244 	    def = get_tv_number_chk(&argvars[2], &error);
8245 	    if (argvars[3].v_type != VAR_UNKNOWN)
8246 	    {
8247 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
8248 		if (typestr == NULL)
8249 		    error = TRUE;
8250 		else
8251 		{
8252 		    switch (TOUPPER_ASC(*typestr))
8253 		    {
8254 			case 'E': type = VIM_ERROR; break;
8255 			case 'Q': type = VIM_QUESTION; break;
8256 			case 'I': type = VIM_INFO; break;
8257 			case 'W': type = VIM_WARNING; break;
8258 			case 'G': type = VIM_GENERIC; break;
8259 		    }
8260 		}
8261 	    }
8262 	}
8263     }
8264 
8265     if (buttons == NULL || *buttons == NUL)
8266 	buttons = (char_u *)_("&Ok");
8267 
8268     if (error)
8269 	rettv->vval.v_number = 0;
8270     else
8271 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
8272 								   def, NULL);
8273 #else
8274     rettv->vval.v_number = 0;
8275 #endif
8276 }
8277 
8278 /*
8279  * "copy()" function
8280  */
8281     static void
8282 f_copy(argvars, rettv)
8283     typval_T	*argvars;
8284     typval_T	*rettv;
8285 {
8286     item_copy(&argvars[0], rettv, FALSE, 0);
8287 }
8288 
8289 /*
8290  * "count()" function
8291  */
8292     static void
8293 f_count(argvars, rettv)
8294     typval_T	*argvars;
8295     typval_T	*rettv;
8296 {
8297     long	n = 0;
8298     int		ic = FALSE;
8299 
8300     if (argvars[0].v_type == VAR_LIST)
8301     {
8302 	listitem_T	*li;
8303 	list_T		*l;
8304 	long		idx;
8305 
8306 	if ((l = argvars[0].vval.v_list) != NULL)
8307 	{
8308 	    li = l->lv_first;
8309 	    if (argvars[2].v_type != VAR_UNKNOWN)
8310 	    {
8311 		int error = FALSE;
8312 
8313 		ic = get_tv_number_chk(&argvars[2], &error);
8314 		if (argvars[3].v_type != VAR_UNKNOWN)
8315 		{
8316 		    idx = get_tv_number_chk(&argvars[3], &error);
8317 		    if (!error)
8318 		    {
8319 			li = list_find(l, idx);
8320 			if (li == NULL)
8321 			    EMSGN(_(e_listidx), idx);
8322 		    }
8323 		}
8324 		if (error)
8325 		    li = NULL;
8326 	    }
8327 
8328 	    for ( ; li != NULL; li = li->li_next)
8329 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8330 		    ++n;
8331 	}
8332     }
8333     else if (argvars[0].v_type == VAR_DICT)
8334     {
8335 	int		todo;
8336 	dict_T		*d;
8337 	hashitem_T	*hi;
8338 
8339 	if ((d = argvars[0].vval.v_dict) != NULL)
8340 	{
8341 	    int error = FALSE;
8342 
8343 	    if (argvars[2].v_type != VAR_UNKNOWN)
8344 	    {
8345 		ic = get_tv_number_chk(&argvars[2], &error);
8346 		if (argvars[3].v_type != VAR_UNKNOWN)
8347 		    EMSG(_(e_invarg));
8348 	    }
8349 
8350 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8351 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8352 	    {
8353 		if (!HASHITEM_EMPTY(hi))
8354 		{
8355 		    --todo;
8356 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8357 			++n;
8358 		}
8359 	    }
8360 	}
8361     }
8362     else
8363 	EMSG2(_(e_listdictarg), "count()");
8364     rettv->vval.v_number = n;
8365 }
8366 
8367 /*
8368  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8369  *
8370  * Checks the existence of a cscope connection.
8371  */
8372 /*ARGSUSED*/
8373     static void
8374 f_cscope_connection(argvars, rettv)
8375     typval_T	*argvars;
8376     typval_T	*rettv;
8377 {
8378 #ifdef FEAT_CSCOPE
8379     int		num = 0;
8380     char_u	*dbpath = NULL;
8381     char_u	*prepend = NULL;
8382     char_u	buf[NUMBUFLEN];
8383 
8384     if (argvars[0].v_type != VAR_UNKNOWN
8385 	    && argvars[1].v_type != VAR_UNKNOWN)
8386     {
8387 	num = (int)get_tv_number(&argvars[0]);
8388 	dbpath = get_tv_string(&argvars[1]);
8389 	if (argvars[2].v_type != VAR_UNKNOWN)
8390 	    prepend = get_tv_string_buf(&argvars[2], buf);
8391     }
8392 
8393     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8394 #else
8395     rettv->vval.v_number = 0;
8396 #endif
8397 }
8398 
8399 /*
8400  * "cursor(lnum, col)" function
8401  *
8402  * Moves the cursor to the specified line and column
8403  */
8404 /*ARGSUSED*/
8405     static void
8406 f_cursor(argvars, rettv)
8407     typval_T	*argvars;
8408     typval_T	*rettv;
8409 {
8410     long	line, col;
8411 #ifdef FEAT_VIRTUALEDIT
8412     long	coladd = 0;
8413 #endif
8414 
8415     if (argvars[1].v_type == VAR_UNKNOWN)
8416     {
8417 	pos_T	    pos;
8418 
8419 	if (list2fpos(argvars, &pos, NULL) == FAIL)
8420 	    return;
8421 	line = pos.lnum;
8422 	col = pos.col;
8423 #ifdef FEAT_VIRTUALEDIT
8424 	coladd = pos.coladd;
8425 #endif
8426     }
8427     else
8428     {
8429 	line = get_tv_lnum(argvars);
8430 	col = get_tv_number_chk(&argvars[1], NULL);
8431 #ifdef FEAT_VIRTUALEDIT
8432 	if (argvars[2].v_type != VAR_UNKNOWN)
8433 	    coladd = get_tv_number_chk(&argvars[2], NULL);
8434 #endif
8435     }
8436     if (line < 0 || col < 0
8437 #ifdef FEAT_VIRTUALEDIT
8438 			    || coladd < 0
8439 #endif
8440 	    )
8441 	return;		/* type error; errmsg already given */
8442     if (line > 0)
8443 	curwin->w_cursor.lnum = line;
8444     if (col > 0)
8445 	curwin->w_cursor.col = col - 1;
8446 #ifdef FEAT_VIRTUALEDIT
8447     curwin->w_cursor.coladd = coladd;
8448 #endif
8449 
8450     /* Make sure the cursor is in a valid position. */
8451     check_cursor();
8452 #ifdef FEAT_MBYTE
8453     /* Correct cursor for multi-byte character. */
8454     if (has_mbyte)
8455 	mb_adjust_cursor();
8456 #endif
8457 
8458     curwin->w_set_curswant = TRUE;
8459 }
8460 
8461 /*
8462  * "deepcopy()" function
8463  */
8464     static void
8465 f_deepcopy(argvars, rettv)
8466     typval_T	*argvars;
8467     typval_T	*rettv;
8468 {
8469     int		noref = 0;
8470 
8471     if (argvars[1].v_type != VAR_UNKNOWN)
8472 	noref = get_tv_number_chk(&argvars[1], NULL);
8473     if (noref < 0 || noref > 1)
8474 	EMSG(_(e_invarg));
8475     else
8476 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8477 }
8478 
8479 /*
8480  * "delete()" function
8481  */
8482     static void
8483 f_delete(argvars, rettv)
8484     typval_T	*argvars;
8485     typval_T	*rettv;
8486 {
8487     if (check_restricted() || check_secure())
8488 	rettv->vval.v_number = -1;
8489     else
8490 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8491 }
8492 
8493 /*
8494  * "did_filetype()" function
8495  */
8496 /*ARGSUSED*/
8497     static void
8498 f_did_filetype(argvars, rettv)
8499     typval_T	*argvars;
8500     typval_T	*rettv;
8501 {
8502 #ifdef FEAT_AUTOCMD
8503     rettv->vval.v_number = did_filetype;
8504 #else
8505     rettv->vval.v_number = 0;
8506 #endif
8507 }
8508 
8509 /*
8510  * "diff_filler()" function
8511  */
8512 /*ARGSUSED*/
8513     static void
8514 f_diff_filler(argvars, rettv)
8515     typval_T	*argvars;
8516     typval_T	*rettv;
8517 {
8518 #ifdef FEAT_DIFF
8519     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8520 #endif
8521 }
8522 
8523 /*
8524  * "diff_hlID()" function
8525  */
8526 /*ARGSUSED*/
8527     static void
8528 f_diff_hlID(argvars, rettv)
8529     typval_T	*argvars;
8530     typval_T	*rettv;
8531 {
8532 #ifdef FEAT_DIFF
8533     linenr_T		lnum = get_tv_lnum(argvars);
8534     static linenr_T	prev_lnum = 0;
8535     static int		changedtick = 0;
8536     static int		fnum = 0;
8537     static int		change_start = 0;
8538     static int		change_end = 0;
8539     static hlf_T	hlID = 0;
8540     int			filler_lines;
8541     int			col;
8542 
8543     if (lnum < 0)	/* ignore type error in {lnum} arg */
8544 	lnum = 0;
8545     if (lnum != prev_lnum
8546 	    || changedtick != curbuf->b_changedtick
8547 	    || fnum != curbuf->b_fnum)
8548     {
8549 	/* New line, buffer, change: need to get the values. */
8550 	filler_lines = diff_check(curwin, lnum);
8551 	if (filler_lines < 0)
8552 	{
8553 	    if (filler_lines == -1)
8554 	    {
8555 		change_start = MAXCOL;
8556 		change_end = -1;
8557 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8558 		    hlID = HLF_ADD;	/* added line */
8559 		else
8560 		    hlID = HLF_CHD;	/* changed line */
8561 	    }
8562 	    else
8563 		hlID = HLF_ADD;	/* added line */
8564 	}
8565 	else
8566 	    hlID = (hlf_T)0;
8567 	prev_lnum = lnum;
8568 	changedtick = curbuf->b_changedtick;
8569 	fnum = curbuf->b_fnum;
8570     }
8571 
8572     if (hlID == HLF_CHD || hlID == HLF_TXD)
8573     {
8574 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8575 	if (col >= change_start && col <= change_end)
8576 	    hlID = HLF_TXD;			/* changed text */
8577 	else
8578 	    hlID = HLF_CHD;			/* changed line */
8579     }
8580     rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
8581 #endif
8582 }
8583 
8584 /*
8585  * "empty({expr})" function
8586  */
8587     static void
8588 f_empty(argvars, rettv)
8589     typval_T	*argvars;
8590     typval_T	*rettv;
8591 {
8592     int		n;
8593 
8594     switch (argvars[0].v_type)
8595     {
8596 	case VAR_STRING:
8597 	case VAR_FUNC:
8598 	    n = argvars[0].vval.v_string == NULL
8599 					  || *argvars[0].vval.v_string == NUL;
8600 	    break;
8601 	case VAR_NUMBER:
8602 	    n = argvars[0].vval.v_number == 0;
8603 	    break;
8604 	case VAR_LIST:
8605 	    n = argvars[0].vval.v_list == NULL
8606 				  || argvars[0].vval.v_list->lv_first == NULL;
8607 	    break;
8608 	case VAR_DICT:
8609 	    n = argvars[0].vval.v_dict == NULL
8610 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8611 	    break;
8612 	default:
8613 	    EMSG2(_(e_intern2), "f_empty()");
8614 	    n = 0;
8615     }
8616 
8617     rettv->vval.v_number = n;
8618 }
8619 
8620 /*
8621  * "escape({string}, {chars})" function
8622  */
8623     static void
8624 f_escape(argvars, rettv)
8625     typval_T	*argvars;
8626     typval_T	*rettv;
8627 {
8628     char_u	buf[NUMBUFLEN];
8629 
8630     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8631 					 get_tv_string_buf(&argvars[1], buf));
8632     rettv->v_type = VAR_STRING;
8633 }
8634 
8635 /*
8636  * "eval()" function
8637  */
8638 /*ARGSUSED*/
8639     static void
8640 f_eval(argvars, rettv)
8641     typval_T	*argvars;
8642     typval_T	*rettv;
8643 {
8644     char_u	*s;
8645 
8646     s = get_tv_string_chk(&argvars[0]);
8647     if (s != NULL)
8648 	s = skipwhite(s);
8649 
8650     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8651     {
8652 	rettv->v_type = VAR_NUMBER;
8653 	rettv->vval.v_number = 0;
8654     }
8655     else if (*s != NUL)
8656 	EMSG(_(e_trailing));
8657 }
8658 
8659 /*
8660  * "eventhandler()" function
8661  */
8662 /*ARGSUSED*/
8663     static void
8664 f_eventhandler(argvars, rettv)
8665     typval_T	*argvars;
8666     typval_T	*rettv;
8667 {
8668     rettv->vval.v_number = vgetc_busy;
8669 }
8670 
8671 /*
8672  * "executable()" function
8673  */
8674     static void
8675 f_executable(argvars, rettv)
8676     typval_T	*argvars;
8677     typval_T	*rettv;
8678 {
8679     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8680 }
8681 
8682 /*
8683  * "exists()" function
8684  */
8685     static void
8686 f_exists(argvars, rettv)
8687     typval_T	*argvars;
8688     typval_T	*rettv;
8689 {
8690     char_u	*p;
8691     char_u	*name;
8692     int		n = FALSE;
8693     int		len = 0;
8694 
8695     p = get_tv_string(&argvars[0]);
8696     if (*p == '$')			/* environment variable */
8697     {
8698 	/* first try "normal" environment variables (fast) */
8699 	if (mch_getenv(p + 1) != NULL)
8700 	    n = TRUE;
8701 	else
8702 	{
8703 	    /* try expanding things like $VIM and ${HOME} */
8704 	    p = expand_env_save(p);
8705 	    if (p != NULL && *p != '$')
8706 		n = TRUE;
8707 	    vim_free(p);
8708 	}
8709     }
8710     else if (*p == '&' || *p == '+')			/* option */
8711 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8712     else if (*p == '*')			/* internal or user defined function */
8713     {
8714 	n = function_exists(p + 1);
8715     }
8716     else if (*p == ':')
8717     {
8718 	n = cmd_exists(p + 1);
8719     }
8720     else if (*p == '#')
8721     {
8722 #ifdef FEAT_AUTOCMD
8723 	if (p[1] == '#')
8724 	    n = autocmd_supported(p + 2);
8725 	else
8726 	    n = au_exists(p + 1);
8727 #endif
8728     }
8729     else				/* internal variable */
8730     {
8731 	char_u	    *tofree;
8732 	typval_T    tv;
8733 
8734 	/* get_name_len() takes care of expanding curly braces */
8735 	name = p;
8736 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8737 	if (len > 0)
8738 	{
8739 	    if (tofree != NULL)
8740 		name = tofree;
8741 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8742 	    if (n)
8743 	    {
8744 		/* handle d.key, l[idx], f(expr) */
8745 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8746 		if (n)
8747 		    clear_tv(&tv);
8748 	    }
8749 	}
8750 
8751 	vim_free(tofree);
8752     }
8753 
8754     rettv->vval.v_number = n;
8755 }
8756 
8757 /*
8758  * "expand()" function
8759  */
8760     static void
8761 f_expand(argvars, rettv)
8762     typval_T	*argvars;
8763     typval_T	*rettv;
8764 {
8765     char_u	*s;
8766     int		len;
8767     char_u	*errormsg;
8768     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8769     expand_T	xpc;
8770     int		error = FALSE;
8771 
8772     rettv->v_type = VAR_STRING;
8773     s = get_tv_string(&argvars[0]);
8774     if (*s == '%' || *s == '#' || *s == '<')
8775     {
8776 	++emsg_off;
8777 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8778 	--emsg_off;
8779     }
8780     else
8781     {
8782 	/* When the optional second argument is non-zero, don't remove matches
8783 	 * for 'suffixes' and 'wildignore' */
8784 	if (argvars[1].v_type != VAR_UNKNOWN
8785 				    && get_tv_number_chk(&argvars[1], &error))
8786 	    flags |= WILD_KEEP_ALL;
8787 	if (!error)
8788 	{
8789 	    ExpandInit(&xpc);
8790 	    xpc.xp_context = EXPAND_FILES;
8791 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8792 	    ExpandCleanup(&xpc);
8793 	}
8794 	else
8795 	    rettv->vval.v_string = NULL;
8796     }
8797 }
8798 
8799 /*
8800  * "extend(list, list [, idx])" function
8801  * "extend(dict, dict [, action])" function
8802  */
8803     static void
8804 f_extend(argvars, rettv)
8805     typval_T	*argvars;
8806     typval_T	*rettv;
8807 {
8808     rettv->vval.v_number = 0;
8809     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8810     {
8811 	list_T		*l1, *l2;
8812 	listitem_T	*item;
8813 	long		before;
8814 	int		error = FALSE;
8815 
8816 	l1 = argvars[0].vval.v_list;
8817 	l2 = argvars[1].vval.v_list;
8818 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8819 		&& l2 != NULL)
8820 	{
8821 	    if (argvars[2].v_type != VAR_UNKNOWN)
8822 	    {
8823 		before = get_tv_number_chk(&argvars[2], &error);
8824 		if (error)
8825 		    return;		/* type error; errmsg already given */
8826 
8827 		if (before == l1->lv_len)
8828 		    item = NULL;
8829 		else
8830 		{
8831 		    item = list_find(l1, before);
8832 		    if (item == NULL)
8833 		    {
8834 			EMSGN(_(e_listidx), before);
8835 			return;
8836 		    }
8837 		}
8838 	    }
8839 	    else
8840 		item = NULL;
8841 	    list_extend(l1, l2, item);
8842 
8843 	    copy_tv(&argvars[0], rettv);
8844 	}
8845     }
8846     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8847     {
8848 	dict_T		*d1, *d2;
8849 	dictitem_T	*di1;
8850 	char_u		*action;
8851 	int		i;
8852 	hashitem_T	*hi2;
8853 	int		todo;
8854 
8855 	d1 = argvars[0].vval.v_dict;
8856 	d2 = argvars[1].vval.v_dict;
8857 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8858 		&& d2 != NULL)
8859 	{
8860 	    /* Check the third argument. */
8861 	    if (argvars[2].v_type != VAR_UNKNOWN)
8862 	    {
8863 		static char *(av[]) = {"keep", "force", "error"};
8864 
8865 		action = get_tv_string_chk(&argvars[2]);
8866 		if (action == NULL)
8867 		    return;		/* type error; errmsg already given */
8868 		for (i = 0; i < 3; ++i)
8869 		    if (STRCMP(action, av[i]) == 0)
8870 			break;
8871 		if (i == 3)
8872 		{
8873 		    EMSGN(_(e_invarg2), action);
8874 		    return;
8875 		}
8876 	    }
8877 	    else
8878 		action = (char_u *)"force";
8879 
8880 	    /* Go over all entries in the second dict and add them to the
8881 	     * first dict. */
8882 	    todo = d2->dv_hashtab.ht_used;
8883 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8884 	    {
8885 		if (!HASHITEM_EMPTY(hi2))
8886 		{
8887 		    --todo;
8888 		    di1 = dict_find(d1, hi2->hi_key, -1);
8889 		    if (di1 == NULL)
8890 		    {
8891 			di1 = dictitem_copy(HI2DI(hi2));
8892 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8893 			    dictitem_free(di1);
8894 		    }
8895 		    else if (*action == 'e')
8896 		    {
8897 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8898 			break;
8899 		    }
8900 		    else if (*action == 'f')
8901 		    {
8902 			clear_tv(&di1->di_tv);
8903 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8904 		    }
8905 		}
8906 	    }
8907 
8908 	    copy_tv(&argvars[0], rettv);
8909 	}
8910     }
8911     else
8912 	EMSG2(_(e_listdictarg), "extend()");
8913 }
8914 
8915 /*
8916  * "filereadable()" function
8917  */
8918     static void
8919 f_filereadable(argvars, rettv)
8920     typval_T	*argvars;
8921     typval_T	*rettv;
8922 {
8923     FILE	*fd;
8924     char_u	*p;
8925     int		n;
8926 
8927     p = get_tv_string(&argvars[0]);
8928     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8929     {
8930 	n = TRUE;
8931 	fclose(fd);
8932     }
8933     else
8934 	n = FALSE;
8935 
8936     rettv->vval.v_number = n;
8937 }
8938 
8939 /*
8940  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8941  * rights to write into.
8942  */
8943     static void
8944 f_filewritable(argvars, rettv)
8945     typval_T	*argvars;
8946     typval_T	*rettv;
8947 {
8948     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8949 }
8950 
8951 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8952 
8953     static void
8954 findfilendir(argvars, rettv, dir)
8955     typval_T	*argvars;
8956     typval_T	*rettv;
8957     int		dir;
8958 {
8959 #ifdef FEAT_SEARCHPATH
8960     char_u	*fname;
8961     char_u	*fresult = NULL;
8962     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8963     char_u	*p;
8964     char_u	pathbuf[NUMBUFLEN];
8965     int		count = 1;
8966     int		first = TRUE;
8967     int		error = FALSE;
8968 #endif
8969 
8970     rettv->vval.v_string = NULL;
8971     rettv->v_type = VAR_STRING;
8972 
8973 #ifdef FEAT_SEARCHPATH
8974     fname = get_tv_string(&argvars[0]);
8975 
8976     if (argvars[1].v_type != VAR_UNKNOWN)
8977     {
8978 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8979 	if (p == NULL)
8980 	    error = TRUE;
8981 	else
8982 	{
8983 	    if (*p != NUL)
8984 		path = p;
8985 
8986 	    if (argvars[2].v_type != VAR_UNKNOWN)
8987 		count = get_tv_number_chk(&argvars[2], &error);
8988 	}
8989     }
8990 
8991     if (count < 0 && rettv_list_alloc(rettv) == FAIL)
8992 	error = TRUE;
8993 
8994     if (*fname != NUL && !error)
8995     {
8996 	do
8997 	{
8998 	    if (rettv->v_type == VAR_STRING)
8999 		vim_free(fresult);
9000 	    fresult = find_file_in_path_option(first ? fname : NULL,
9001 					       first ? (int)STRLEN(fname) : 0,
9002 					0, first, path, dir, NULL,
9003 					dir ? (char_u *)"" : curbuf->b_p_sua);
9004 	    first = FALSE;
9005 
9006 	    if (fresult != NULL && rettv->v_type == VAR_LIST)
9007 		list_append_string(rettv->vval.v_list, fresult, -1);
9008 
9009 	} while ((rettv->v_type == VAR_LIST || --count > 0) && fresult != NULL);
9010     }
9011 
9012     if (rettv->v_type == VAR_STRING)
9013 	rettv->vval.v_string = fresult;
9014 #endif
9015 }
9016 
9017 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
9018 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
9019 
9020 /*
9021  * Implementation of map() and filter().
9022  */
9023     static void
9024 filter_map(argvars, rettv, map)
9025     typval_T	*argvars;
9026     typval_T	*rettv;
9027     int		map;
9028 {
9029     char_u	buf[NUMBUFLEN];
9030     char_u	*expr;
9031     listitem_T	*li, *nli;
9032     list_T	*l = NULL;
9033     dictitem_T	*di;
9034     hashtab_T	*ht;
9035     hashitem_T	*hi;
9036     dict_T	*d = NULL;
9037     typval_T	save_val;
9038     typval_T	save_key;
9039     int		rem;
9040     int		todo;
9041     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
9042     int		save_did_emsg;
9043 
9044     rettv->vval.v_number = 0;
9045     if (argvars[0].v_type == VAR_LIST)
9046     {
9047 	if ((l = argvars[0].vval.v_list) == NULL
9048 		|| (map && tv_check_lock(l->lv_lock, msg)))
9049 	    return;
9050     }
9051     else if (argvars[0].v_type == VAR_DICT)
9052     {
9053 	if ((d = argvars[0].vval.v_dict) == NULL
9054 		|| (map && tv_check_lock(d->dv_lock, msg)))
9055 	    return;
9056     }
9057     else
9058     {
9059 	EMSG2(_(e_listdictarg), msg);
9060 	return;
9061     }
9062 
9063     expr = get_tv_string_buf_chk(&argvars[1], buf);
9064     /* On type errors, the preceding call has already displayed an error
9065      * message.  Avoid a misleading error message for an empty string that
9066      * was not passed as argument. */
9067     if (expr != NULL)
9068     {
9069 	prepare_vimvar(VV_VAL, &save_val);
9070 	expr = skipwhite(expr);
9071 
9072 	/* We reset "did_emsg" to be able to detect whether an error
9073 	 * occurred during evaluation of the expression. */
9074 	save_did_emsg = did_emsg;
9075 	did_emsg = FALSE;
9076 
9077 	if (argvars[0].v_type == VAR_DICT)
9078 	{
9079 	    prepare_vimvar(VV_KEY, &save_key);
9080 	    vimvars[VV_KEY].vv_type = VAR_STRING;
9081 
9082 	    ht = &d->dv_hashtab;
9083 	    hash_lock(ht);
9084 	    todo = ht->ht_used;
9085 	    for (hi = ht->ht_array; todo > 0; ++hi)
9086 	    {
9087 		if (!HASHITEM_EMPTY(hi))
9088 		{
9089 		    --todo;
9090 		    di = HI2DI(hi);
9091 		    if (tv_check_lock(di->di_tv.v_lock, msg))
9092 			break;
9093 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
9094 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL
9095 								  || did_emsg)
9096 			break;
9097 		    if (!map && rem)
9098 			dictitem_remove(d, di);
9099 		    clear_tv(&vimvars[VV_KEY].vv_tv);
9100 		}
9101 	    }
9102 	    hash_unlock(ht);
9103 
9104 	    restore_vimvar(VV_KEY, &save_key);
9105 	}
9106 	else
9107 	{
9108 	    for (li = l->lv_first; li != NULL; li = nli)
9109 	    {
9110 		if (tv_check_lock(li->li_tv.v_lock, msg))
9111 		    break;
9112 		nli = li->li_next;
9113 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
9114 								  || did_emsg)
9115 		    break;
9116 		if (!map && rem)
9117 		    listitem_remove(l, li);
9118 	    }
9119 	}
9120 
9121 	restore_vimvar(VV_VAL, &save_val);
9122 
9123 	did_emsg |= save_did_emsg;
9124     }
9125 
9126     copy_tv(&argvars[0], rettv);
9127 }
9128 
9129     static int
9130 filter_map_one(tv, expr, map, remp)
9131     typval_T	*tv;
9132     char_u	*expr;
9133     int		map;
9134     int		*remp;
9135 {
9136     typval_T	rettv;
9137     char_u	*s;
9138 
9139     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
9140     s = expr;
9141     if (eval1(&s, &rettv, TRUE) == FAIL)
9142 	return FAIL;
9143     if (*s != NUL)  /* check for trailing chars after expr */
9144     {
9145 	EMSG2(_(e_invexpr2), s);
9146 	return FAIL;
9147     }
9148     if (map)
9149     {
9150 	/* map(): replace the list item value */
9151 	clear_tv(tv);
9152 	rettv.v_lock = 0;
9153 	*tv = rettv;
9154     }
9155     else
9156     {
9157 	int	    error = FALSE;
9158 
9159 	/* filter(): when expr is zero remove the item */
9160 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
9161 	clear_tv(&rettv);
9162 	/* On type error, nothing has been removed; return FAIL to stop the
9163 	 * loop.  The error message was given by get_tv_number_chk(). */
9164 	if (error)
9165 	    return FAIL;
9166     }
9167     clear_tv(&vimvars[VV_VAL].vv_tv);
9168     return OK;
9169 }
9170 
9171 /*
9172  * "filter()" function
9173  */
9174     static void
9175 f_filter(argvars, rettv)
9176     typval_T	*argvars;
9177     typval_T	*rettv;
9178 {
9179     filter_map(argvars, rettv, FALSE);
9180 }
9181 
9182 /*
9183  * "finddir({fname}[, {path}[, {count}]])" function
9184  */
9185     static void
9186 f_finddir(argvars, rettv)
9187     typval_T	*argvars;
9188     typval_T	*rettv;
9189 {
9190     findfilendir(argvars, rettv, TRUE);
9191 }
9192 
9193 /*
9194  * "findfile({fname}[, {path}[, {count}]])" function
9195  */
9196     static void
9197 f_findfile(argvars, rettv)
9198     typval_T	*argvars;
9199     typval_T	*rettv;
9200 {
9201     findfilendir(argvars, rettv, FALSE);
9202 }
9203 
9204 /*
9205  * "fnamemodify({fname}, {mods})" function
9206  */
9207     static void
9208 f_fnamemodify(argvars, rettv)
9209     typval_T	*argvars;
9210     typval_T	*rettv;
9211 {
9212     char_u	*fname;
9213     char_u	*mods;
9214     int		usedlen = 0;
9215     int		len;
9216     char_u	*fbuf = NULL;
9217     char_u	buf[NUMBUFLEN];
9218 
9219     fname = get_tv_string_chk(&argvars[0]);
9220     mods = get_tv_string_buf_chk(&argvars[1], buf);
9221     if (fname == NULL || mods == NULL)
9222 	fname = NULL;
9223     else
9224     {
9225 	len = (int)STRLEN(fname);
9226 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
9227     }
9228 
9229     rettv->v_type = VAR_STRING;
9230     if (fname == NULL)
9231 	rettv->vval.v_string = NULL;
9232     else
9233 	rettv->vval.v_string = vim_strnsave(fname, len);
9234     vim_free(fbuf);
9235 }
9236 
9237 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
9238 
9239 /*
9240  * "foldclosed()" function
9241  */
9242     static void
9243 foldclosed_both(argvars, rettv, end)
9244     typval_T	*argvars;
9245     typval_T	*rettv;
9246     int		end;
9247 {
9248 #ifdef FEAT_FOLDING
9249     linenr_T	lnum;
9250     linenr_T	first, last;
9251 
9252     lnum = get_tv_lnum(argvars);
9253     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9254     {
9255 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
9256 	{
9257 	    if (end)
9258 		rettv->vval.v_number = (varnumber_T)last;
9259 	    else
9260 		rettv->vval.v_number = (varnumber_T)first;
9261 	    return;
9262 	}
9263     }
9264 #endif
9265     rettv->vval.v_number = -1;
9266 }
9267 
9268 /*
9269  * "foldclosed()" function
9270  */
9271     static void
9272 f_foldclosed(argvars, rettv)
9273     typval_T	*argvars;
9274     typval_T	*rettv;
9275 {
9276     foldclosed_both(argvars, rettv, FALSE);
9277 }
9278 
9279 /*
9280  * "foldclosedend()" function
9281  */
9282     static void
9283 f_foldclosedend(argvars, rettv)
9284     typval_T	*argvars;
9285     typval_T	*rettv;
9286 {
9287     foldclosed_both(argvars, rettv, TRUE);
9288 }
9289 
9290 /*
9291  * "foldlevel()" function
9292  */
9293     static void
9294 f_foldlevel(argvars, rettv)
9295     typval_T	*argvars;
9296     typval_T	*rettv;
9297 {
9298 #ifdef FEAT_FOLDING
9299     linenr_T	lnum;
9300 
9301     lnum = get_tv_lnum(argvars);
9302     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9303 	rettv->vval.v_number = foldLevel(lnum);
9304     else
9305 #endif
9306 	rettv->vval.v_number = 0;
9307 }
9308 
9309 /*
9310  * "foldtext()" function
9311  */
9312 /*ARGSUSED*/
9313     static void
9314 f_foldtext(argvars, rettv)
9315     typval_T	*argvars;
9316     typval_T	*rettv;
9317 {
9318 #ifdef FEAT_FOLDING
9319     linenr_T	lnum;
9320     char_u	*s;
9321     char_u	*r;
9322     int		len;
9323     char	*txt;
9324 #endif
9325 
9326     rettv->v_type = VAR_STRING;
9327     rettv->vval.v_string = NULL;
9328 #ifdef FEAT_FOLDING
9329     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
9330 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
9331 						 <= curbuf->b_ml.ml_line_count
9332 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
9333     {
9334 	/* Find first non-empty line in the fold. */
9335 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
9336 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9337 	{
9338 	    if (!linewhite(lnum))
9339 		break;
9340 	    ++lnum;
9341 	}
9342 
9343 	/* Find interesting text in this line. */
9344 	s = skipwhite(ml_get(lnum));
9345 	/* skip C comment-start */
9346 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9347 	{
9348 	    s = skipwhite(s + 2);
9349 	    if (*skipwhite(s) == NUL
9350 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9351 	    {
9352 		s = skipwhite(ml_get(lnum + 1));
9353 		if (*s == '*')
9354 		    s = skipwhite(s + 1);
9355 	    }
9356 	}
9357 	txt = _("+-%s%3ld lines: ");
9358 	r = alloc((unsigned)(STRLEN(txt)
9359 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9360 		    + 20				    /* for %3ld */
9361 		    + STRLEN(s)));			    /* concatenated */
9362 	if (r != NULL)
9363 	{
9364 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9365 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9366 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9367 	    len = (int)STRLEN(r);
9368 	    STRCAT(r, s);
9369 	    /* remove 'foldmarker' and 'commentstring' */
9370 	    foldtext_cleanup(r + len);
9371 	    rettv->vval.v_string = r;
9372 	}
9373     }
9374 #endif
9375 }
9376 
9377 /*
9378  * "foldtextresult(lnum)" function
9379  */
9380 /*ARGSUSED*/
9381     static void
9382 f_foldtextresult(argvars, rettv)
9383     typval_T	*argvars;
9384     typval_T	*rettv;
9385 {
9386 #ifdef FEAT_FOLDING
9387     linenr_T	lnum;
9388     char_u	*text;
9389     char_u	buf[51];
9390     foldinfo_T  foldinfo;
9391     int		fold_count;
9392 #endif
9393 
9394     rettv->v_type = VAR_STRING;
9395     rettv->vval.v_string = NULL;
9396 #ifdef FEAT_FOLDING
9397     lnum = get_tv_lnum(argvars);
9398     /* treat illegal types and illegal string values for {lnum} the same */
9399     if (lnum < 0)
9400 	lnum = 0;
9401     fold_count = foldedCount(curwin, lnum, &foldinfo);
9402     if (fold_count > 0)
9403     {
9404 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9405 							      &foldinfo, buf);
9406 	if (text == buf)
9407 	    text = vim_strsave(text);
9408 	rettv->vval.v_string = text;
9409     }
9410 #endif
9411 }
9412 
9413 /*
9414  * "foreground()" function
9415  */
9416 /*ARGSUSED*/
9417     static void
9418 f_foreground(argvars, rettv)
9419     typval_T	*argvars;
9420     typval_T	*rettv;
9421 {
9422     rettv->vval.v_number = 0;
9423 #ifdef FEAT_GUI
9424     if (gui.in_use)
9425 	gui_mch_set_foreground();
9426 #else
9427 # ifdef WIN32
9428     win32_set_foreground();
9429 # endif
9430 #endif
9431 }
9432 
9433 /*
9434  * "function()" function
9435  */
9436 /*ARGSUSED*/
9437     static void
9438 f_function(argvars, rettv)
9439     typval_T	*argvars;
9440     typval_T	*rettv;
9441 {
9442     char_u	*s;
9443 
9444     rettv->vval.v_number = 0;
9445     s = get_tv_string(&argvars[0]);
9446     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9447 	EMSG2(_(e_invarg2), s);
9448     else if (!function_exists(s))
9449 	EMSG2(_("E700: Unknown function: %s"), s);
9450     else
9451     {
9452 	rettv->vval.v_string = vim_strsave(s);
9453 	rettv->v_type = VAR_FUNC;
9454     }
9455 }
9456 
9457 /*
9458  * "garbagecollect()" function
9459  */
9460 /*ARGSUSED*/
9461     static void
9462 f_garbagecollect(argvars, rettv)
9463     typval_T	*argvars;
9464     typval_T	*rettv;
9465 {
9466     garbage_collect();
9467 }
9468 
9469 /*
9470  * "get()" function
9471  */
9472     static void
9473 f_get(argvars, rettv)
9474     typval_T	*argvars;
9475     typval_T	*rettv;
9476 {
9477     listitem_T	*li;
9478     list_T	*l;
9479     dictitem_T	*di;
9480     dict_T	*d;
9481     typval_T	*tv = NULL;
9482 
9483     if (argvars[0].v_type == VAR_LIST)
9484     {
9485 	if ((l = argvars[0].vval.v_list) != NULL)
9486 	{
9487 	    int		error = FALSE;
9488 
9489 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9490 	    if (!error && li != NULL)
9491 		tv = &li->li_tv;
9492 	}
9493     }
9494     else if (argvars[0].v_type == VAR_DICT)
9495     {
9496 	if ((d = argvars[0].vval.v_dict) != NULL)
9497 	{
9498 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9499 	    if (di != NULL)
9500 		tv = &di->di_tv;
9501 	}
9502     }
9503     else
9504 	EMSG2(_(e_listdictarg), "get()");
9505 
9506     if (tv == NULL)
9507     {
9508 	if (argvars[2].v_type == VAR_UNKNOWN)
9509 	    rettv->vval.v_number = 0;
9510 	else
9511 	    copy_tv(&argvars[2], rettv);
9512     }
9513     else
9514 	copy_tv(tv, rettv);
9515 }
9516 
9517 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9518 
9519 /*
9520  * Get line or list of lines from buffer "buf" into "rettv".
9521  * Return a range (from start to end) of lines in rettv from the specified
9522  * buffer.
9523  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9524  */
9525     static void
9526 get_buffer_lines(buf, start, end, retlist, rettv)
9527     buf_T	*buf;
9528     linenr_T	start;
9529     linenr_T	end;
9530     int		retlist;
9531     typval_T	*rettv;
9532 {
9533     char_u	*p;
9534 
9535     if (retlist)
9536     {
9537 	if (rettv_list_alloc(rettv) == FAIL)
9538 	    return;
9539     }
9540     else
9541 	rettv->vval.v_number = 0;
9542 
9543     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9544 	return;
9545 
9546     if (!retlist)
9547     {
9548 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9549 	    p = ml_get_buf(buf, start, FALSE);
9550 	else
9551 	    p = (char_u *)"";
9552 
9553 	rettv->v_type = VAR_STRING;
9554 	rettv->vval.v_string = vim_strsave(p);
9555     }
9556     else
9557     {
9558 	if (end < start)
9559 	    return;
9560 
9561 	if (start < 1)
9562 	    start = 1;
9563 	if (end > buf->b_ml.ml_line_count)
9564 	    end = buf->b_ml.ml_line_count;
9565 	while (start <= end)
9566 	    if (list_append_string(rettv->vval.v_list,
9567 				 ml_get_buf(buf, start++, FALSE), -1) == FAIL)
9568 		break;
9569     }
9570 }
9571 
9572 /*
9573  * "getbufline()" function
9574  */
9575     static void
9576 f_getbufline(argvars, rettv)
9577     typval_T	*argvars;
9578     typval_T	*rettv;
9579 {
9580     linenr_T	lnum;
9581     linenr_T	end;
9582     buf_T	*buf;
9583 
9584     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9585     ++emsg_off;
9586     buf = get_buf_tv(&argvars[0]);
9587     --emsg_off;
9588 
9589     lnum = get_tv_lnum_buf(&argvars[1], buf);
9590     if (argvars[2].v_type == VAR_UNKNOWN)
9591 	end = lnum;
9592     else
9593 	end = get_tv_lnum_buf(&argvars[2], buf);
9594 
9595     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9596 }
9597 
9598 /*
9599  * "getbufvar()" function
9600  */
9601     static void
9602 f_getbufvar(argvars, rettv)
9603     typval_T	*argvars;
9604     typval_T	*rettv;
9605 {
9606     buf_T	*buf;
9607     buf_T	*save_curbuf;
9608     char_u	*varname;
9609     dictitem_T	*v;
9610 
9611     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9612     varname = get_tv_string_chk(&argvars[1]);
9613     ++emsg_off;
9614     buf = get_buf_tv(&argvars[0]);
9615 
9616     rettv->v_type = VAR_STRING;
9617     rettv->vval.v_string = NULL;
9618 
9619     if (buf != NULL && varname != NULL)
9620     {
9621 	if (*varname == '&')	/* buffer-local-option */
9622 	{
9623 	    /* set curbuf to be our buf, temporarily */
9624 	    save_curbuf = curbuf;
9625 	    curbuf = buf;
9626 
9627 	    get_option_tv(&varname, rettv, TRUE);
9628 
9629 	    /* restore previous notion of curbuf */
9630 	    curbuf = save_curbuf;
9631 	}
9632 	else
9633 	{
9634 	    if (*varname == NUL)
9635 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9636 		 * scope prefix before the NUL byte is required by
9637 		 * find_var_in_ht(). */
9638 		varname = (char_u *)"b:" + 2;
9639 	    /* look up the variable */
9640 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9641 	    if (v != NULL)
9642 		copy_tv(&v->di_tv, rettv);
9643 	}
9644     }
9645 
9646     --emsg_off;
9647 }
9648 
9649 /*
9650  * "getchar()" function
9651  */
9652     static void
9653 f_getchar(argvars, rettv)
9654     typval_T	*argvars;
9655     typval_T	*rettv;
9656 {
9657     varnumber_T		n;
9658     int			error = FALSE;
9659 
9660     ++no_mapping;
9661     ++allow_keys;
9662     if (argvars[0].v_type == VAR_UNKNOWN)
9663 	/* getchar(): blocking wait. */
9664 	n = safe_vgetc();
9665     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9666 	/* getchar(1): only check if char avail */
9667 	n = vpeekc();
9668     else if (error || vpeekc() == NUL)
9669 	/* illegal argument or getchar(0) and no char avail: return zero */
9670 	n = 0;
9671     else
9672 	/* getchar(0) and char avail: return char */
9673 	n = safe_vgetc();
9674     --no_mapping;
9675     --allow_keys;
9676 
9677     rettv->vval.v_number = n;
9678     if (IS_SPECIAL(n) || mod_mask != 0)
9679     {
9680 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9681 	int		i = 0;
9682 
9683 	/* Turn a special key into three bytes, plus modifier. */
9684 	if (mod_mask != 0)
9685 	{
9686 	    temp[i++] = K_SPECIAL;
9687 	    temp[i++] = KS_MODIFIER;
9688 	    temp[i++] = mod_mask;
9689 	}
9690 	if (IS_SPECIAL(n))
9691 	{
9692 	    temp[i++] = K_SPECIAL;
9693 	    temp[i++] = K_SECOND(n);
9694 	    temp[i++] = K_THIRD(n);
9695 	}
9696 #ifdef FEAT_MBYTE
9697 	else if (has_mbyte)
9698 	    i += (*mb_char2bytes)(n, temp + i);
9699 #endif
9700 	else
9701 	    temp[i++] = n;
9702 	temp[i++] = NUL;
9703 	rettv->v_type = VAR_STRING;
9704 	rettv->vval.v_string = vim_strsave(temp);
9705     }
9706 }
9707 
9708 /*
9709  * "getcharmod()" function
9710  */
9711 /*ARGSUSED*/
9712     static void
9713 f_getcharmod(argvars, rettv)
9714     typval_T	*argvars;
9715     typval_T	*rettv;
9716 {
9717     rettv->vval.v_number = mod_mask;
9718 }
9719 
9720 /*
9721  * "getcmdline()" function
9722  */
9723 /*ARGSUSED*/
9724     static void
9725 f_getcmdline(argvars, rettv)
9726     typval_T	*argvars;
9727     typval_T	*rettv;
9728 {
9729     rettv->v_type = VAR_STRING;
9730     rettv->vval.v_string = get_cmdline_str();
9731 }
9732 
9733 /*
9734  * "getcmdpos()" function
9735  */
9736 /*ARGSUSED*/
9737     static void
9738 f_getcmdpos(argvars, rettv)
9739     typval_T	*argvars;
9740     typval_T	*rettv;
9741 {
9742     rettv->vval.v_number = get_cmdline_pos() + 1;
9743 }
9744 
9745 /*
9746  * "getcmdtype()" function
9747  */
9748 /*ARGSUSED*/
9749     static void
9750 f_getcmdtype(argvars, rettv)
9751     typval_T	*argvars;
9752     typval_T	*rettv;
9753 {
9754     rettv->v_type = VAR_STRING;
9755     rettv->vval.v_string = alloc(2);
9756     if (rettv->vval.v_string != NULL)
9757     {
9758 	rettv->vval.v_string[0] = get_cmdline_type();
9759 	rettv->vval.v_string[1] = NUL;
9760     }
9761 }
9762 
9763 /*
9764  * "getcwd()" function
9765  */
9766 /*ARGSUSED*/
9767     static void
9768 f_getcwd(argvars, rettv)
9769     typval_T	*argvars;
9770     typval_T	*rettv;
9771 {
9772     char_u	cwd[MAXPATHL];
9773 
9774     rettv->v_type = VAR_STRING;
9775     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9776 	rettv->vval.v_string = NULL;
9777     else
9778     {
9779 	rettv->vval.v_string = vim_strsave(cwd);
9780 #ifdef BACKSLASH_IN_FILENAME
9781 	if (rettv->vval.v_string != NULL)
9782 	    slash_adjust(rettv->vval.v_string);
9783 #endif
9784     }
9785 }
9786 
9787 /*
9788  * "getfontname()" function
9789  */
9790 /*ARGSUSED*/
9791     static void
9792 f_getfontname(argvars, rettv)
9793     typval_T	*argvars;
9794     typval_T	*rettv;
9795 {
9796     rettv->v_type = VAR_STRING;
9797     rettv->vval.v_string = NULL;
9798 #ifdef FEAT_GUI
9799     if (gui.in_use)
9800     {
9801 	GuiFont font;
9802 	char_u	*name = NULL;
9803 
9804 	if (argvars[0].v_type == VAR_UNKNOWN)
9805 	{
9806 	    /* Get the "Normal" font.  Either the name saved by
9807 	     * hl_set_font_name() or from the font ID. */
9808 	    font = gui.norm_font;
9809 	    name = hl_get_font_name();
9810 	}
9811 	else
9812 	{
9813 	    name = get_tv_string(&argvars[0]);
9814 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9815 		return;
9816 	    font = gui_mch_get_font(name, FALSE);
9817 	    if (font == NOFONT)
9818 		return;	    /* Invalid font name, return empty string. */
9819 	}
9820 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9821 	if (argvars[0].v_type != VAR_UNKNOWN)
9822 	    gui_mch_free_font(font);
9823     }
9824 #endif
9825 }
9826 
9827 /*
9828  * "getfperm({fname})" function
9829  */
9830     static void
9831 f_getfperm(argvars, rettv)
9832     typval_T	*argvars;
9833     typval_T	*rettv;
9834 {
9835     char_u	*fname;
9836     struct stat st;
9837     char_u	*perm = NULL;
9838     char_u	flags[] = "rwx";
9839     int		i;
9840 
9841     fname = get_tv_string(&argvars[0]);
9842 
9843     rettv->v_type = VAR_STRING;
9844     if (mch_stat((char *)fname, &st) >= 0)
9845     {
9846 	perm = vim_strsave((char_u *)"---------");
9847 	if (perm != NULL)
9848 	{
9849 	    for (i = 0; i < 9; i++)
9850 	    {
9851 		if (st.st_mode & (1 << (8 - i)))
9852 		    perm[i] = flags[i % 3];
9853 	    }
9854 	}
9855     }
9856     rettv->vval.v_string = perm;
9857 }
9858 
9859 /*
9860  * "getfsize({fname})" function
9861  */
9862     static void
9863 f_getfsize(argvars, rettv)
9864     typval_T	*argvars;
9865     typval_T	*rettv;
9866 {
9867     char_u	*fname;
9868     struct stat	st;
9869 
9870     fname = get_tv_string(&argvars[0]);
9871 
9872     rettv->v_type = VAR_NUMBER;
9873 
9874     if (mch_stat((char *)fname, &st) >= 0)
9875     {
9876 	if (mch_isdir(fname))
9877 	    rettv->vval.v_number = 0;
9878 	else
9879 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9880     }
9881     else
9882 	  rettv->vval.v_number = -1;
9883 }
9884 
9885 /*
9886  * "getftime({fname})" function
9887  */
9888     static void
9889 f_getftime(argvars, rettv)
9890     typval_T	*argvars;
9891     typval_T	*rettv;
9892 {
9893     char_u	*fname;
9894     struct stat	st;
9895 
9896     fname = get_tv_string(&argvars[0]);
9897 
9898     if (mch_stat((char *)fname, &st) >= 0)
9899 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9900     else
9901 	rettv->vval.v_number = -1;
9902 }
9903 
9904 /*
9905  * "getftype({fname})" function
9906  */
9907     static void
9908 f_getftype(argvars, rettv)
9909     typval_T	*argvars;
9910     typval_T	*rettv;
9911 {
9912     char_u	*fname;
9913     struct stat st;
9914     char_u	*type = NULL;
9915     char	*t;
9916 
9917     fname = get_tv_string(&argvars[0]);
9918 
9919     rettv->v_type = VAR_STRING;
9920     if (mch_lstat((char *)fname, &st) >= 0)
9921     {
9922 #ifdef S_ISREG
9923 	if (S_ISREG(st.st_mode))
9924 	    t = "file";
9925 	else if (S_ISDIR(st.st_mode))
9926 	    t = "dir";
9927 # ifdef S_ISLNK
9928 	else if (S_ISLNK(st.st_mode))
9929 	    t = "link";
9930 # endif
9931 # ifdef S_ISBLK
9932 	else if (S_ISBLK(st.st_mode))
9933 	    t = "bdev";
9934 # endif
9935 # ifdef S_ISCHR
9936 	else if (S_ISCHR(st.st_mode))
9937 	    t = "cdev";
9938 # endif
9939 # ifdef S_ISFIFO
9940 	else if (S_ISFIFO(st.st_mode))
9941 	    t = "fifo";
9942 # endif
9943 # ifdef S_ISSOCK
9944 	else if (S_ISSOCK(st.st_mode))
9945 	    t = "fifo";
9946 # endif
9947 	else
9948 	    t = "other";
9949 #else
9950 # ifdef S_IFMT
9951 	switch (st.st_mode & S_IFMT)
9952 	{
9953 	    case S_IFREG: t = "file"; break;
9954 	    case S_IFDIR: t = "dir"; break;
9955 #  ifdef S_IFLNK
9956 	    case S_IFLNK: t = "link"; break;
9957 #  endif
9958 #  ifdef S_IFBLK
9959 	    case S_IFBLK: t = "bdev"; break;
9960 #  endif
9961 #  ifdef S_IFCHR
9962 	    case S_IFCHR: t = "cdev"; break;
9963 #  endif
9964 #  ifdef S_IFIFO
9965 	    case S_IFIFO: t = "fifo"; break;
9966 #  endif
9967 #  ifdef S_IFSOCK
9968 	    case S_IFSOCK: t = "socket"; break;
9969 #  endif
9970 	    default: t = "other";
9971 	}
9972 # else
9973 	if (mch_isdir(fname))
9974 	    t = "dir";
9975 	else
9976 	    t = "file";
9977 # endif
9978 #endif
9979 	type = vim_strsave((char_u *)t);
9980     }
9981     rettv->vval.v_string = type;
9982 }
9983 
9984 /*
9985  * "getline(lnum, [end])" function
9986  */
9987     static void
9988 f_getline(argvars, rettv)
9989     typval_T	*argvars;
9990     typval_T	*rettv;
9991 {
9992     linenr_T	lnum;
9993     linenr_T	end;
9994     int		retlist;
9995 
9996     lnum = get_tv_lnum(argvars);
9997     if (argvars[1].v_type == VAR_UNKNOWN)
9998     {
9999 	end = 0;
10000 	retlist = FALSE;
10001     }
10002     else
10003     {
10004 	end = get_tv_lnum(&argvars[1]);
10005 	retlist = TRUE;
10006     }
10007 
10008     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
10009 }
10010 
10011 /*
10012  * "getpos(string)" function
10013  */
10014     static void
10015 f_getpos(argvars, rettv)
10016     typval_T	*argvars;
10017     typval_T	*rettv;
10018 {
10019     pos_T	*fp;
10020     list_T	*l;
10021     int		fnum = -1;
10022 
10023     if (rettv_list_alloc(rettv) == OK)
10024     {
10025 	l = rettv->vval.v_list;
10026 	fp = var2fpos(&argvars[0], TRUE, &fnum);
10027 	if (fnum != -1)
10028 	    list_append_number(l, (varnumber_T)fnum);
10029 	else
10030 	    list_append_number(l, (varnumber_T)0);
10031 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->lnum
10032 							    : (varnumber_T)0);
10033 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->col + 1
10034 							    : (varnumber_T)0);
10035 	list_append_number(l,
10036 #ifdef FEAT_VIRTUALEDIT
10037 				(fp != NULL) ? (varnumber_T)fp->coladd :
10038 #endif
10039 							      (varnumber_T)0);
10040     }
10041     else
10042 	rettv->vval.v_number = FALSE;
10043 }
10044 
10045 /*
10046  * "getqflist()" and "getloclist()" functions
10047  */
10048 /*ARGSUSED*/
10049     static void
10050 f_getqflist(argvars, rettv)
10051     typval_T	*argvars;
10052     typval_T	*rettv;
10053 {
10054 #ifdef FEAT_QUICKFIX
10055     win_T	*wp;
10056 #endif
10057 
10058     rettv->vval.v_number = FALSE;
10059 #ifdef FEAT_QUICKFIX
10060     if (rettv_list_alloc(rettv) == OK)
10061     {
10062 	wp = NULL;
10063 	if (argvars[0].v_type != VAR_UNKNOWN)	/* getloclist() */
10064 	{
10065 	    wp = find_win_by_nr(&argvars[0]);
10066 	    if (wp == NULL)
10067 		return;
10068 	}
10069 
10070 	(void)get_errorlist(wp, rettv->vval.v_list);
10071     }
10072 #endif
10073 }
10074 
10075 /*
10076  * "getreg()" function
10077  */
10078     static void
10079 f_getreg(argvars, rettv)
10080     typval_T	*argvars;
10081     typval_T	*rettv;
10082 {
10083     char_u	*strregname;
10084     int		regname;
10085     int		arg2 = FALSE;
10086     int		error = FALSE;
10087 
10088     if (argvars[0].v_type != VAR_UNKNOWN)
10089     {
10090 	strregname = get_tv_string_chk(&argvars[0]);
10091 	error = strregname == NULL;
10092 	if (argvars[1].v_type != VAR_UNKNOWN)
10093 	    arg2 = get_tv_number_chk(&argvars[1], &error);
10094     }
10095     else
10096 	strregname = vimvars[VV_REG].vv_str;
10097     regname = (strregname == NULL ? '"' : *strregname);
10098     if (regname == 0)
10099 	regname = '"';
10100 
10101     rettv->v_type = VAR_STRING;
10102     rettv->vval.v_string = error ? NULL :
10103 				    get_reg_contents(regname, TRUE, arg2);
10104 }
10105 
10106 /*
10107  * "getregtype()" function
10108  */
10109     static void
10110 f_getregtype(argvars, rettv)
10111     typval_T	*argvars;
10112     typval_T	*rettv;
10113 {
10114     char_u	*strregname;
10115     int		regname;
10116     char_u	buf[NUMBUFLEN + 2];
10117     long	reglen = 0;
10118 
10119     if (argvars[0].v_type != VAR_UNKNOWN)
10120     {
10121 	strregname = get_tv_string_chk(&argvars[0]);
10122 	if (strregname == NULL)	    /* type error; errmsg already given */
10123 	{
10124 	    rettv->v_type = VAR_STRING;
10125 	    rettv->vval.v_string = NULL;
10126 	    return;
10127 	}
10128     }
10129     else
10130 	/* Default to v:register */
10131 	strregname = vimvars[VV_REG].vv_str;
10132 
10133     regname = (strregname == NULL ? '"' : *strregname);
10134     if (regname == 0)
10135 	regname = '"';
10136 
10137     buf[0] = NUL;
10138     buf[1] = NUL;
10139     switch (get_reg_type(regname, &reglen))
10140     {
10141 	case MLINE: buf[0] = 'V'; break;
10142 	case MCHAR: buf[0] = 'v'; break;
10143 #ifdef FEAT_VISUAL
10144 	case MBLOCK:
10145 		buf[0] = Ctrl_V;
10146 		sprintf((char *)buf + 1, "%ld", reglen + 1);
10147 		break;
10148 #endif
10149     }
10150     rettv->v_type = VAR_STRING;
10151     rettv->vval.v_string = vim_strsave(buf);
10152 }
10153 
10154 /*
10155  * "getwinposx()" function
10156  */
10157 /*ARGSUSED*/
10158     static void
10159 f_getwinposx(argvars, rettv)
10160     typval_T	*argvars;
10161     typval_T	*rettv;
10162 {
10163     rettv->vval.v_number = -1;
10164 #ifdef FEAT_GUI
10165     if (gui.in_use)
10166     {
10167 	int	    x, y;
10168 
10169 	if (gui_mch_get_winpos(&x, &y) == OK)
10170 	    rettv->vval.v_number = x;
10171     }
10172 #endif
10173 }
10174 
10175 /*
10176  * "getwinposy()" function
10177  */
10178 /*ARGSUSED*/
10179     static void
10180 f_getwinposy(argvars, rettv)
10181     typval_T	*argvars;
10182     typval_T	*rettv;
10183 {
10184     rettv->vval.v_number = -1;
10185 #ifdef FEAT_GUI
10186     if (gui.in_use)
10187     {
10188 	int	    x, y;
10189 
10190 	if (gui_mch_get_winpos(&x, &y) == OK)
10191 	    rettv->vval.v_number = y;
10192     }
10193 #endif
10194 }
10195 
10196     static win_T *
10197 find_win_by_nr(vp)
10198     typval_T	*vp;
10199 {
10200 #ifdef FEAT_WINDOWS
10201     win_T	*wp;
10202 #endif
10203     int		nr;
10204 
10205     nr = get_tv_number_chk(vp, NULL);
10206 
10207 #ifdef FEAT_WINDOWS
10208     if (nr < 0)
10209 	return NULL;
10210     if (nr == 0)
10211 	return curwin;
10212 
10213     for (wp = firstwin; wp != NULL; wp = wp->w_next)
10214 	if (--nr <= 0)
10215 	    break;
10216     return wp;
10217 #else
10218     if (nr == 0 || nr == 1)
10219 	return curwin;
10220     return NULL;
10221 #endif
10222 }
10223 
10224 /*
10225  * "getwinvar()" function
10226  */
10227     static void
10228 f_getwinvar(argvars, rettv)
10229     typval_T	*argvars;
10230     typval_T	*rettv;
10231 {
10232     win_T	*win, *oldcurwin;
10233     char_u	*varname;
10234     dictitem_T	*v;
10235 
10236     win = find_win_by_nr(&argvars[0]);
10237     varname = get_tv_string_chk(&argvars[1]);
10238     ++emsg_off;
10239 
10240     rettv->v_type = VAR_STRING;
10241     rettv->vval.v_string = NULL;
10242 
10243     if (win != NULL && varname != NULL)
10244     {
10245 	if (*varname == '&')	/* window-local-option */
10246 	{
10247 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
10248 	     * that we can get buffer-local options. */
10249 	    oldcurwin = curwin;
10250 	    curwin = win;
10251 	    curbuf = win->w_buffer;
10252 
10253 	    get_option_tv(&varname, rettv, 1);
10254 
10255 	    /* restore previous notion of curwin */
10256 	    curwin = oldcurwin;
10257 	    curbuf = curwin->w_buffer;
10258 	}
10259 	else
10260 	{
10261 	    if (*varname == NUL)
10262 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
10263 		 * scope prefix before the NUL byte is required by
10264 		 * find_var_in_ht(). */
10265 		varname = (char_u *)"w:" + 2;
10266 	    /* look up the variable */
10267 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
10268 	    if (v != NULL)
10269 		copy_tv(&v->di_tv, rettv);
10270 	}
10271     }
10272 
10273     --emsg_off;
10274 }
10275 
10276 /*
10277  * "glob()" function
10278  */
10279     static void
10280 f_glob(argvars, rettv)
10281     typval_T	*argvars;
10282     typval_T	*rettv;
10283 {
10284     expand_T	xpc;
10285 
10286     ExpandInit(&xpc);
10287     xpc.xp_context = EXPAND_FILES;
10288     rettv->v_type = VAR_STRING;
10289     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
10290 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
10291     ExpandCleanup(&xpc);
10292 }
10293 
10294 /*
10295  * "globpath()" function
10296  */
10297     static void
10298 f_globpath(argvars, rettv)
10299     typval_T	*argvars;
10300     typval_T	*rettv;
10301 {
10302     char_u	buf1[NUMBUFLEN];
10303     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
10304 
10305     rettv->v_type = VAR_STRING;
10306     if (file == NULL)
10307 	rettv->vval.v_string = NULL;
10308     else
10309 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
10310 }
10311 
10312 /*
10313  * "has()" function
10314  */
10315     static void
10316 f_has(argvars, rettv)
10317     typval_T	*argvars;
10318     typval_T	*rettv;
10319 {
10320     int		i;
10321     char_u	*name;
10322     int		n = FALSE;
10323     static char	*(has_list[]) =
10324     {
10325 #ifdef AMIGA
10326 	"amiga",
10327 # ifdef FEAT_ARP
10328 	"arp",
10329 # endif
10330 #endif
10331 #ifdef __BEOS__
10332 	"beos",
10333 #endif
10334 #ifdef MSDOS
10335 # ifdef DJGPP
10336 	"dos32",
10337 # else
10338 	"dos16",
10339 # endif
10340 #endif
10341 #ifdef MACOS
10342 	"mac",
10343 #endif
10344 #if defined(MACOS_X_UNIX)
10345 	"macunix",
10346 #endif
10347 #ifdef OS2
10348 	"os2",
10349 #endif
10350 #ifdef __QNX__
10351 	"qnx",
10352 #endif
10353 #ifdef RISCOS
10354 	"riscos",
10355 #endif
10356 #ifdef UNIX
10357 	"unix",
10358 #endif
10359 #ifdef VMS
10360 	"vms",
10361 #endif
10362 #ifdef WIN16
10363 	"win16",
10364 #endif
10365 #ifdef WIN32
10366 	"win32",
10367 #endif
10368 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
10369 	"win32unix",
10370 #endif
10371 #ifdef WIN64
10372 	"win64",
10373 #endif
10374 #ifdef EBCDIC
10375 	"ebcdic",
10376 #endif
10377 #ifndef CASE_INSENSITIVE_FILENAME
10378 	"fname_case",
10379 #endif
10380 #ifdef FEAT_ARABIC
10381 	"arabic",
10382 #endif
10383 #ifdef FEAT_AUTOCMD
10384 	"autocmd",
10385 #endif
10386 #ifdef FEAT_BEVAL
10387 	"balloon_eval",
10388 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10389 	"balloon_multiline",
10390 # endif
10391 #endif
10392 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10393 	"builtin_terms",
10394 # ifdef ALL_BUILTIN_TCAPS
10395 	"all_builtin_terms",
10396 # endif
10397 #endif
10398 #ifdef FEAT_BYTEOFF
10399 	"byte_offset",
10400 #endif
10401 #ifdef FEAT_CINDENT
10402 	"cindent",
10403 #endif
10404 #ifdef FEAT_CLIENTSERVER
10405 	"clientserver",
10406 #endif
10407 #ifdef FEAT_CLIPBOARD
10408 	"clipboard",
10409 #endif
10410 #ifdef FEAT_CMDL_COMPL
10411 	"cmdline_compl",
10412 #endif
10413 #ifdef FEAT_CMDHIST
10414 	"cmdline_hist",
10415 #endif
10416 #ifdef FEAT_COMMENTS
10417 	"comments",
10418 #endif
10419 #ifdef FEAT_CRYPT
10420 	"cryptv",
10421 #endif
10422 #ifdef FEAT_CSCOPE
10423 	"cscope",
10424 #endif
10425 #ifdef CURSOR_SHAPE
10426 	"cursorshape",
10427 #endif
10428 #ifdef DEBUG
10429 	"debug",
10430 #endif
10431 #ifdef FEAT_CON_DIALOG
10432 	"dialog_con",
10433 #endif
10434 #ifdef FEAT_GUI_DIALOG
10435 	"dialog_gui",
10436 #endif
10437 #ifdef FEAT_DIFF
10438 	"diff",
10439 #endif
10440 #ifdef FEAT_DIGRAPHS
10441 	"digraphs",
10442 #endif
10443 #ifdef FEAT_DND
10444 	"dnd",
10445 #endif
10446 #ifdef FEAT_EMACS_TAGS
10447 	"emacs_tags",
10448 #endif
10449 	"eval",	    /* always present, of course! */
10450 #ifdef FEAT_EX_EXTRA
10451 	"ex_extra",
10452 #endif
10453 #ifdef FEAT_SEARCH_EXTRA
10454 	"extra_search",
10455 #endif
10456 #ifdef FEAT_FKMAP
10457 	"farsi",
10458 #endif
10459 #ifdef FEAT_SEARCHPATH
10460 	"file_in_path",
10461 #endif
10462 #if defined(UNIX) && !defined(USE_SYSTEM)
10463 	"filterpipe",
10464 #endif
10465 #ifdef FEAT_FIND_ID
10466 	"find_in_path",
10467 #endif
10468 #ifdef FEAT_FOLDING
10469 	"folding",
10470 #endif
10471 #ifdef FEAT_FOOTER
10472 	"footer",
10473 #endif
10474 #if !defined(USE_SYSTEM) && defined(UNIX)
10475 	"fork",
10476 #endif
10477 #ifdef FEAT_GETTEXT
10478 	"gettext",
10479 #endif
10480 #ifdef FEAT_GUI
10481 	"gui",
10482 #endif
10483 #ifdef FEAT_GUI_ATHENA
10484 # ifdef FEAT_GUI_NEXTAW
10485 	"gui_neXtaw",
10486 # else
10487 	"gui_athena",
10488 # endif
10489 #endif
10490 #ifdef FEAT_GUI_GTK
10491 	"gui_gtk",
10492 # ifdef HAVE_GTK2
10493 	"gui_gtk2",
10494 # endif
10495 #endif
10496 #ifdef FEAT_GUI_MAC
10497 	"gui_mac",
10498 #endif
10499 #ifdef FEAT_GUI_MOTIF
10500 	"gui_motif",
10501 #endif
10502 #ifdef FEAT_GUI_PHOTON
10503 	"gui_photon",
10504 #endif
10505 #ifdef FEAT_GUI_W16
10506 	"gui_win16",
10507 #endif
10508 #ifdef FEAT_GUI_W32
10509 	"gui_win32",
10510 #endif
10511 #ifdef FEAT_HANGULIN
10512 	"hangul_input",
10513 #endif
10514 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10515 	"iconv",
10516 #endif
10517 #ifdef FEAT_INS_EXPAND
10518 	"insert_expand",
10519 #endif
10520 #ifdef FEAT_JUMPLIST
10521 	"jumplist",
10522 #endif
10523 #ifdef FEAT_KEYMAP
10524 	"keymap",
10525 #endif
10526 #ifdef FEAT_LANGMAP
10527 	"langmap",
10528 #endif
10529 #ifdef FEAT_LIBCALL
10530 	"libcall",
10531 #endif
10532 #ifdef FEAT_LINEBREAK
10533 	"linebreak",
10534 #endif
10535 #ifdef FEAT_LISP
10536 	"lispindent",
10537 #endif
10538 #ifdef FEAT_LISTCMDS
10539 	"listcmds",
10540 #endif
10541 #ifdef FEAT_LOCALMAP
10542 	"localmap",
10543 #endif
10544 #ifdef FEAT_MENU
10545 	"menu",
10546 #endif
10547 #ifdef FEAT_SESSION
10548 	"mksession",
10549 #endif
10550 #ifdef FEAT_MODIFY_FNAME
10551 	"modify_fname",
10552 #endif
10553 #ifdef FEAT_MOUSE
10554 	"mouse",
10555 #endif
10556 #ifdef FEAT_MOUSESHAPE
10557 	"mouseshape",
10558 #endif
10559 #if defined(UNIX) || defined(VMS)
10560 # ifdef FEAT_MOUSE_DEC
10561 	"mouse_dec",
10562 # endif
10563 # ifdef FEAT_MOUSE_GPM
10564 	"mouse_gpm",
10565 # endif
10566 # ifdef FEAT_MOUSE_JSB
10567 	"mouse_jsbterm",
10568 # endif
10569 # ifdef FEAT_MOUSE_NET
10570 	"mouse_netterm",
10571 # endif
10572 # ifdef FEAT_MOUSE_PTERM
10573 	"mouse_pterm",
10574 # endif
10575 # ifdef FEAT_MOUSE_XTERM
10576 	"mouse_xterm",
10577 # endif
10578 #endif
10579 #ifdef FEAT_MBYTE
10580 	"multi_byte",
10581 #endif
10582 #ifdef FEAT_MBYTE_IME
10583 	"multi_byte_ime",
10584 #endif
10585 #ifdef FEAT_MULTI_LANG
10586 	"multi_lang",
10587 #endif
10588 #ifdef FEAT_MZSCHEME
10589 #ifndef DYNAMIC_MZSCHEME
10590 	"mzscheme",
10591 #endif
10592 #endif
10593 #ifdef FEAT_OLE
10594 	"ole",
10595 #endif
10596 #ifdef FEAT_OSFILETYPE
10597 	"osfiletype",
10598 #endif
10599 #ifdef FEAT_PATH_EXTRA
10600 	"path_extra",
10601 #endif
10602 #ifdef FEAT_PERL
10603 #ifndef DYNAMIC_PERL
10604 	"perl",
10605 #endif
10606 #endif
10607 #ifdef FEAT_PYTHON
10608 #ifndef DYNAMIC_PYTHON
10609 	"python",
10610 #endif
10611 #endif
10612 #ifdef FEAT_POSTSCRIPT
10613 	"postscript",
10614 #endif
10615 #ifdef FEAT_PRINTER
10616 	"printer",
10617 #endif
10618 #ifdef FEAT_PROFILE
10619 	"profile",
10620 #endif
10621 #ifdef FEAT_RELTIME
10622 	"reltime",
10623 #endif
10624 #ifdef FEAT_QUICKFIX
10625 	"quickfix",
10626 #endif
10627 #ifdef FEAT_RIGHTLEFT
10628 	"rightleft",
10629 #endif
10630 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10631 	"ruby",
10632 #endif
10633 #ifdef FEAT_SCROLLBIND
10634 	"scrollbind",
10635 #endif
10636 #ifdef FEAT_CMDL_INFO
10637 	"showcmd",
10638 	"cmdline_info",
10639 #endif
10640 #ifdef FEAT_SIGNS
10641 	"signs",
10642 #endif
10643 #ifdef FEAT_SMARTINDENT
10644 	"smartindent",
10645 #endif
10646 #ifdef FEAT_SNIFF
10647 	"sniff",
10648 #endif
10649 #ifdef FEAT_STL_OPT
10650 	"statusline",
10651 #endif
10652 #ifdef FEAT_SUN_WORKSHOP
10653 	"sun_workshop",
10654 #endif
10655 #ifdef FEAT_NETBEANS_INTG
10656 	"netbeans_intg",
10657 #endif
10658 #ifdef FEAT_SPELL
10659 	"spell",
10660 #endif
10661 #ifdef FEAT_SYN_HL
10662 	"syntax",
10663 #endif
10664 #if defined(USE_SYSTEM) || !defined(UNIX)
10665 	"system",
10666 #endif
10667 #ifdef FEAT_TAG_BINS
10668 	"tag_binary",
10669 #endif
10670 #ifdef FEAT_TAG_OLDSTATIC
10671 	"tag_old_static",
10672 #endif
10673 #ifdef FEAT_TAG_ANYWHITE
10674 	"tag_any_white",
10675 #endif
10676 #ifdef FEAT_TCL
10677 # ifndef DYNAMIC_TCL
10678 	"tcl",
10679 # endif
10680 #endif
10681 #ifdef TERMINFO
10682 	"terminfo",
10683 #endif
10684 #ifdef FEAT_TERMRESPONSE
10685 	"termresponse",
10686 #endif
10687 #ifdef FEAT_TEXTOBJ
10688 	"textobjects",
10689 #endif
10690 #ifdef HAVE_TGETENT
10691 	"tgetent",
10692 #endif
10693 #ifdef FEAT_TITLE
10694 	"title",
10695 #endif
10696 #ifdef FEAT_TOOLBAR
10697 	"toolbar",
10698 #endif
10699 #ifdef FEAT_USR_CMDS
10700 	"user-commands",    /* was accidentally included in 5.4 */
10701 	"user_commands",
10702 #endif
10703 #ifdef FEAT_VIMINFO
10704 	"viminfo",
10705 #endif
10706 #ifdef FEAT_VERTSPLIT
10707 	"vertsplit",
10708 #endif
10709 #ifdef FEAT_VIRTUALEDIT
10710 	"virtualedit",
10711 #endif
10712 #ifdef FEAT_VISUAL
10713 	"visual",
10714 #endif
10715 #ifdef FEAT_VISUALEXTRA
10716 	"visualextra",
10717 #endif
10718 #ifdef FEAT_VREPLACE
10719 	"vreplace",
10720 #endif
10721 #ifdef FEAT_WILDIGN
10722 	"wildignore",
10723 #endif
10724 #ifdef FEAT_WILDMENU
10725 	"wildmenu",
10726 #endif
10727 #ifdef FEAT_WINDOWS
10728 	"windows",
10729 #endif
10730 #ifdef FEAT_WAK
10731 	"winaltkeys",
10732 #endif
10733 #ifdef FEAT_WRITEBACKUP
10734 	"writebackup",
10735 #endif
10736 #ifdef FEAT_XIM
10737 	"xim",
10738 #endif
10739 #ifdef FEAT_XFONTSET
10740 	"xfontset",
10741 #endif
10742 #ifdef USE_XSMP
10743 	"xsmp",
10744 #endif
10745 #ifdef USE_XSMP_INTERACT
10746 	"xsmp_interact",
10747 #endif
10748 #ifdef FEAT_XCLIPBOARD
10749 	"xterm_clipboard",
10750 #endif
10751 #ifdef FEAT_XTERM_SAVE
10752 	"xterm_save",
10753 #endif
10754 #if defined(UNIX) && defined(FEAT_X11)
10755 	"X11",
10756 #endif
10757 	NULL
10758     };
10759 
10760     name = get_tv_string(&argvars[0]);
10761     for (i = 0; has_list[i] != NULL; ++i)
10762 	if (STRICMP(name, has_list[i]) == 0)
10763 	{
10764 	    n = TRUE;
10765 	    break;
10766 	}
10767 
10768     if (n == FALSE)
10769     {
10770 	if (STRNICMP(name, "patch", 5) == 0)
10771 	    n = has_patch(atoi((char *)name + 5));
10772 	else if (STRICMP(name, "vim_starting") == 0)
10773 	    n = (starting != 0);
10774 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10775 	else if (STRICMP(name, "balloon_multiline") == 0)
10776 	    n = multiline_balloon_available();
10777 #endif
10778 #ifdef DYNAMIC_TCL
10779 	else if (STRICMP(name, "tcl") == 0)
10780 	    n = tcl_enabled(FALSE);
10781 #endif
10782 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10783 	else if (STRICMP(name, "iconv") == 0)
10784 	    n = iconv_enabled(FALSE);
10785 #endif
10786 #ifdef DYNAMIC_MZSCHEME
10787 	else if (STRICMP(name, "mzscheme") == 0)
10788 	    n = mzscheme_enabled(FALSE);
10789 #endif
10790 #ifdef DYNAMIC_RUBY
10791 	else if (STRICMP(name, "ruby") == 0)
10792 	    n = ruby_enabled(FALSE);
10793 #endif
10794 #ifdef DYNAMIC_PYTHON
10795 	else if (STRICMP(name, "python") == 0)
10796 	    n = python_enabled(FALSE);
10797 #endif
10798 #ifdef DYNAMIC_PERL
10799 	else if (STRICMP(name, "perl") == 0)
10800 	    n = perl_enabled(FALSE);
10801 #endif
10802 #ifdef FEAT_GUI
10803 	else if (STRICMP(name, "gui_running") == 0)
10804 	    n = (gui.in_use || gui.starting);
10805 # ifdef FEAT_GUI_W32
10806 	else if (STRICMP(name, "gui_win32s") == 0)
10807 	    n = gui_is_win32s();
10808 # endif
10809 # ifdef FEAT_BROWSE
10810 	else if (STRICMP(name, "browse") == 0)
10811 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10812 # endif
10813 #endif
10814 #ifdef FEAT_SYN_HL
10815 	else if (STRICMP(name, "syntax_items") == 0)
10816 	    n = syntax_present(curbuf);
10817 #endif
10818 #if defined(WIN3264)
10819 	else if (STRICMP(name, "win95") == 0)
10820 	    n = mch_windows95();
10821 #endif
10822 #ifdef FEAT_NETBEANS_INTG
10823 	else if (STRICMP(name, "netbeans_enabled") == 0)
10824 	    n = usingNetbeans;
10825 #endif
10826     }
10827 
10828     rettv->vval.v_number = n;
10829 }
10830 
10831 /*
10832  * "has_key()" function
10833  */
10834     static void
10835 f_has_key(argvars, rettv)
10836     typval_T	*argvars;
10837     typval_T	*rettv;
10838 {
10839     rettv->vval.v_number = 0;
10840     if (argvars[0].v_type != VAR_DICT)
10841     {
10842 	EMSG(_(e_dictreq));
10843 	return;
10844     }
10845     if (argvars[0].vval.v_dict == NULL)
10846 	return;
10847 
10848     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10849 				      get_tv_string(&argvars[1]), -1) != NULL;
10850 }
10851 
10852 /*
10853  * "hasmapto()" function
10854  */
10855     static void
10856 f_hasmapto(argvars, rettv)
10857     typval_T	*argvars;
10858     typval_T	*rettv;
10859 {
10860     char_u	*name;
10861     char_u	*mode;
10862     char_u	buf[NUMBUFLEN];
10863     int		abbr = FALSE;
10864 
10865     name = get_tv_string(&argvars[0]);
10866     if (argvars[1].v_type == VAR_UNKNOWN)
10867 	mode = (char_u *)"nvo";
10868     else
10869     {
10870 	mode = get_tv_string_buf(&argvars[1], buf);
10871 	if (argvars[2].v_type != VAR_UNKNOWN)
10872 	    abbr = get_tv_number(&argvars[2]);
10873     }
10874 
10875     if (map_to_exists(name, mode, abbr))
10876 	rettv->vval.v_number = TRUE;
10877     else
10878 	rettv->vval.v_number = FALSE;
10879 }
10880 
10881 /*
10882  * "histadd()" function
10883  */
10884 /*ARGSUSED*/
10885     static void
10886 f_histadd(argvars, rettv)
10887     typval_T	*argvars;
10888     typval_T	*rettv;
10889 {
10890 #ifdef FEAT_CMDHIST
10891     int		histype;
10892     char_u	*str;
10893     char_u	buf[NUMBUFLEN];
10894 #endif
10895 
10896     rettv->vval.v_number = FALSE;
10897     if (check_restricted() || check_secure())
10898 	return;
10899 #ifdef FEAT_CMDHIST
10900     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10901     histype = str != NULL ? get_histtype(str) : -1;
10902     if (histype >= 0)
10903     {
10904 	str = get_tv_string_buf(&argvars[1], buf);
10905 	if (*str != NUL)
10906 	{
10907 	    add_to_history(histype, str, FALSE, NUL);
10908 	    rettv->vval.v_number = TRUE;
10909 	    return;
10910 	}
10911     }
10912 #endif
10913 }
10914 
10915 /*
10916  * "histdel()" function
10917  */
10918 /*ARGSUSED*/
10919     static void
10920 f_histdel(argvars, rettv)
10921     typval_T	*argvars;
10922     typval_T	*rettv;
10923 {
10924 #ifdef FEAT_CMDHIST
10925     int		n;
10926     char_u	buf[NUMBUFLEN];
10927     char_u	*str;
10928 
10929     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10930     if (str == NULL)
10931 	n = 0;
10932     else if (argvars[1].v_type == VAR_UNKNOWN)
10933 	/* only one argument: clear entire history */
10934 	n = clr_history(get_histtype(str));
10935     else if (argvars[1].v_type == VAR_NUMBER)
10936 	/* index given: remove that entry */
10937 	n = del_history_idx(get_histtype(str),
10938 					  (int)get_tv_number(&argvars[1]));
10939     else
10940 	/* string given: remove all matching entries */
10941 	n = del_history_entry(get_histtype(str),
10942 				      get_tv_string_buf(&argvars[1], buf));
10943     rettv->vval.v_number = n;
10944 #else
10945     rettv->vval.v_number = 0;
10946 #endif
10947 }
10948 
10949 /*
10950  * "histget()" function
10951  */
10952 /*ARGSUSED*/
10953     static void
10954 f_histget(argvars, rettv)
10955     typval_T	*argvars;
10956     typval_T	*rettv;
10957 {
10958 #ifdef FEAT_CMDHIST
10959     int		type;
10960     int		idx;
10961     char_u	*str;
10962 
10963     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10964     if (str == NULL)
10965 	rettv->vval.v_string = NULL;
10966     else
10967     {
10968 	type = get_histtype(str);
10969 	if (argvars[1].v_type == VAR_UNKNOWN)
10970 	    idx = get_history_idx(type);
10971 	else
10972 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10973 						    /* -1 on type error */
10974 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10975     }
10976 #else
10977     rettv->vval.v_string = NULL;
10978 #endif
10979     rettv->v_type = VAR_STRING;
10980 }
10981 
10982 /*
10983  * "histnr()" function
10984  */
10985 /*ARGSUSED*/
10986     static void
10987 f_histnr(argvars, rettv)
10988     typval_T	*argvars;
10989     typval_T	*rettv;
10990 {
10991     int		i;
10992 
10993 #ifdef FEAT_CMDHIST
10994     char_u	*history = get_tv_string_chk(&argvars[0]);
10995 
10996     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10997     if (i >= HIST_CMD && i < HIST_COUNT)
10998 	i = get_history_idx(i);
10999     else
11000 #endif
11001 	i = -1;
11002     rettv->vval.v_number = i;
11003 }
11004 
11005 /*
11006  * "highlightID(name)" function
11007  */
11008     static void
11009 f_hlID(argvars, rettv)
11010     typval_T	*argvars;
11011     typval_T	*rettv;
11012 {
11013     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
11014 }
11015 
11016 /*
11017  * "highlight_exists()" function
11018  */
11019     static void
11020 f_hlexists(argvars, rettv)
11021     typval_T	*argvars;
11022     typval_T	*rettv;
11023 {
11024     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
11025 }
11026 
11027 /*
11028  * "hostname()" function
11029  */
11030 /*ARGSUSED*/
11031     static void
11032 f_hostname(argvars, rettv)
11033     typval_T	*argvars;
11034     typval_T	*rettv;
11035 {
11036     char_u hostname[256];
11037 
11038     mch_get_host_name(hostname, 256);
11039     rettv->v_type = VAR_STRING;
11040     rettv->vval.v_string = vim_strsave(hostname);
11041 }
11042 
11043 /*
11044  * iconv() function
11045  */
11046 /*ARGSUSED*/
11047     static void
11048 f_iconv(argvars, rettv)
11049     typval_T	*argvars;
11050     typval_T	*rettv;
11051 {
11052 #ifdef FEAT_MBYTE
11053     char_u	buf1[NUMBUFLEN];
11054     char_u	buf2[NUMBUFLEN];
11055     char_u	*from, *to, *str;
11056     vimconv_T	vimconv;
11057 #endif
11058 
11059     rettv->v_type = VAR_STRING;
11060     rettv->vval.v_string = NULL;
11061 
11062 #ifdef FEAT_MBYTE
11063     str = get_tv_string(&argvars[0]);
11064     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
11065     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
11066     vimconv.vc_type = CONV_NONE;
11067     convert_setup(&vimconv, from, to);
11068 
11069     /* If the encodings are equal, no conversion needed. */
11070     if (vimconv.vc_type == CONV_NONE)
11071 	rettv->vval.v_string = vim_strsave(str);
11072     else
11073 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
11074 
11075     convert_setup(&vimconv, NULL, NULL);
11076     vim_free(from);
11077     vim_free(to);
11078 #endif
11079 }
11080 
11081 /*
11082  * "indent()" function
11083  */
11084     static void
11085 f_indent(argvars, rettv)
11086     typval_T	*argvars;
11087     typval_T	*rettv;
11088 {
11089     linenr_T	lnum;
11090 
11091     lnum = get_tv_lnum(argvars);
11092     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11093 	rettv->vval.v_number = get_indent_lnum(lnum);
11094     else
11095 	rettv->vval.v_number = -1;
11096 }
11097 
11098 /*
11099  * "index()" function
11100  */
11101     static void
11102 f_index(argvars, rettv)
11103     typval_T	*argvars;
11104     typval_T	*rettv;
11105 {
11106     list_T	*l;
11107     listitem_T	*item;
11108     long	idx = 0;
11109     int		ic = FALSE;
11110 
11111     rettv->vval.v_number = -1;
11112     if (argvars[0].v_type != VAR_LIST)
11113     {
11114 	EMSG(_(e_listreq));
11115 	return;
11116     }
11117     l = argvars[0].vval.v_list;
11118     if (l != NULL)
11119     {
11120 	item = l->lv_first;
11121 	if (argvars[2].v_type != VAR_UNKNOWN)
11122 	{
11123 	    int		error = FALSE;
11124 
11125 	    /* Start at specified item.  Use the cached index that list_find()
11126 	     * sets, so that a negative number also works. */
11127 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
11128 	    idx = l->lv_idx;
11129 	    if (argvars[3].v_type != VAR_UNKNOWN)
11130 		ic = get_tv_number_chk(&argvars[3], &error);
11131 	    if (error)
11132 		item = NULL;
11133 	}
11134 
11135 	for ( ; item != NULL; item = item->li_next, ++idx)
11136 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
11137 	    {
11138 		rettv->vval.v_number = idx;
11139 		break;
11140 	    }
11141     }
11142 }
11143 
11144 static int inputsecret_flag = 0;
11145 
11146 /*
11147  * "input()" function
11148  *     Also handles inputsecret() when inputsecret is set.
11149  */
11150     static void
11151 f_input(argvars, rettv)
11152     typval_T	*argvars;
11153     typval_T	*rettv;
11154 {
11155     char_u	*prompt = get_tv_string_chk(&argvars[0]);
11156     char_u	*p = NULL;
11157     int		c;
11158     char_u	buf[NUMBUFLEN];
11159     int		cmd_silent_save = cmd_silent;
11160     char_u	*defstr = (char_u *)"";
11161     int		xp_type = EXPAND_NOTHING;
11162     char_u	*xp_arg = NULL;
11163 
11164     rettv->v_type = VAR_STRING;
11165 
11166 #ifdef NO_CONSOLE_INPUT
11167     /* While starting up, there is no place to enter text. */
11168     if (no_console_input())
11169     {
11170 	rettv->vval.v_string = NULL;
11171 	return;
11172     }
11173 #endif
11174 
11175     cmd_silent = FALSE;		/* Want to see the prompt. */
11176     if (prompt != NULL)
11177     {
11178 	/* Only the part of the message after the last NL is considered as
11179 	 * prompt for the command line */
11180 	p = vim_strrchr(prompt, '\n');
11181 	if (p == NULL)
11182 	    p = prompt;
11183 	else
11184 	{
11185 	    ++p;
11186 	    c = *p;
11187 	    *p = NUL;
11188 	    msg_start();
11189 	    msg_clr_eos();
11190 	    msg_puts_attr(prompt, echo_attr);
11191 	    msg_didout = FALSE;
11192 	    msg_starthere();
11193 	    *p = c;
11194 	}
11195 	cmdline_row = msg_row;
11196 
11197 	if (argvars[1].v_type != VAR_UNKNOWN)
11198 	{
11199 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
11200 	    if (defstr != NULL)
11201 		stuffReadbuffSpec(defstr);
11202 
11203 	    if (argvars[2].v_type != VAR_UNKNOWN)
11204 	    {
11205 		char_u	*xp_name;
11206 		int		xp_namelen;
11207 		long	argt;
11208 
11209 		rettv->vval.v_string = NULL;
11210 
11211 		xp_name = get_tv_string_buf_chk(&argvars[2], buf);
11212 		if (xp_name == NULL)
11213 		    return;
11214 
11215 		xp_namelen = STRLEN(xp_name);
11216 
11217 		if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
11218 							     &xp_arg) == FAIL)
11219 		    return;
11220 	    }
11221 	}
11222 
11223 	if (defstr != NULL)
11224 	    rettv->vval.v_string =
11225 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr,
11226 				  xp_type, xp_arg);
11227 
11228 	vim_free(xp_arg);
11229 
11230 	/* since the user typed this, no need to wait for return */
11231 	need_wait_return = FALSE;
11232 	msg_didout = FALSE;
11233     }
11234     cmd_silent = cmd_silent_save;
11235 }
11236 
11237 /*
11238  * "inputdialog()" function
11239  */
11240     static void
11241 f_inputdialog(argvars, rettv)
11242     typval_T	*argvars;
11243     typval_T	*rettv;
11244 {
11245 #if defined(FEAT_GUI_TEXTDIALOG)
11246     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
11247     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
11248     {
11249 	char_u	*message;
11250 	char_u	buf[NUMBUFLEN];
11251 	char_u	*defstr = (char_u *)"";
11252 
11253 	message = get_tv_string_chk(&argvars[0]);
11254 	if (argvars[1].v_type != VAR_UNKNOWN
11255 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
11256 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
11257 	else
11258 	    IObuff[0] = NUL;
11259 	if (message != NULL && defstr != NULL
11260 		&& do_dialog(VIM_QUESTION, NULL, message,
11261 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
11262 	    rettv->vval.v_string = vim_strsave(IObuff);
11263 	else
11264 	{
11265 	    if (message != NULL && defstr != NULL
11266 					&& argvars[1].v_type != VAR_UNKNOWN
11267 					&& argvars[2].v_type != VAR_UNKNOWN)
11268 		rettv->vval.v_string = vim_strsave(
11269 				      get_tv_string_buf(&argvars[2], buf));
11270 	    else
11271 		rettv->vval.v_string = NULL;
11272 	}
11273 	rettv->v_type = VAR_STRING;
11274     }
11275     else
11276 #endif
11277 	f_input(argvars, rettv);
11278 }
11279 
11280 /*
11281  * "inputlist()" function
11282  */
11283     static void
11284 f_inputlist(argvars, rettv)
11285     typval_T	*argvars;
11286     typval_T	*rettv;
11287 {
11288     listitem_T	*li;
11289     int		selected;
11290     int		mouse_used;
11291 
11292     rettv->vval.v_number = 0;
11293 #ifdef NO_CONSOLE_INPUT
11294     /* While starting up, there is no place to enter text. */
11295     if (no_console_input())
11296 	return;
11297 #endif
11298     if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
11299     {
11300 	EMSG2(_(e_listarg), "inputlist()");
11301 	return;
11302     }
11303 
11304     msg_start();
11305     lines_left = Rows;	/* avoid more prompt */
11306     msg_scroll = TRUE;
11307     msg_clr_eos();
11308 
11309     for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
11310     {
11311 	msg_puts(get_tv_string(&li->li_tv));
11312 	msg_putchar('\n');
11313     }
11314 
11315     /* Ask for choice. */
11316     selected = prompt_for_number(&mouse_used);
11317     if (mouse_used)
11318 	selected -= lines_left;
11319 
11320     rettv->vval.v_number = selected;
11321 }
11322 
11323 
11324 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
11325 
11326 /*
11327  * "inputrestore()" function
11328  */
11329 /*ARGSUSED*/
11330     static void
11331 f_inputrestore(argvars, rettv)
11332     typval_T	*argvars;
11333     typval_T	*rettv;
11334 {
11335     if (ga_userinput.ga_len > 0)
11336     {
11337 	--ga_userinput.ga_len;
11338 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
11339 						       + ga_userinput.ga_len);
11340 	rettv->vval.v_number = 0; /* OK */
11341     }
11342     else if (p_verbose > 1)
11343     {
11344 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
11345 	rettv->vval.v_number = 1; /* Failed */
11346     }
11347 }
11348 
11349 /*
11350  * "inputsave()" function
11351  */
11352 /*ARGSUSED*/
11353     static void
11354 f_inputsave(argvars, rettv)
11355     typval_T	*argvars;
11356     typval_T	*rettv;
11357 {
11358     /* Add an entry to the stack of typehead storage. */
11359     if (ga_grow(&ga_userinput, 1) == OK)
11360     {
11361 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
11362 						       + ga_userinput.ga_len);
11363 	++ga_userinput.ga_len;
11364 	rettv->vval.v_number = 0; /* OK */
11365     }
11366     else
11367 	rettv->vval.v_number = 1; /* Failed */
11368 }
11369 
11370 /*
11371  * "inputsecret()" function
11372  */
11373     static void
11374 f_inputsecret(argvars, rettv)
11375     typval_T	*argvars;
11376     typval_T	*rettv;
11377 {
11378     ++cmdline_star;
11379     ++inputsecret_flag;
11380     f_input(argvars, rettv);
11381     --cmdline_star;
11382     --inputsecret_flag;
11383 }
11384 
11385 /*
11386  * "insert()" function
11387  */
11388     static void
11389 f_insert(argvars, rettv)
11390     typval_T	*argvars;
11391     typval_T	*rettv;
11392 {
11393     long	before = 0;
11394     listitem_T	*item;
11395     list_T	*l;
11396     int		error = FALSE;
11397 
11398     rettv->vval.v_number = 0;
11399     if (argvars[0].v_type != VAR_LIST)
11400 	EMSG2(_(e_listarg), "insert()");
11401     else if ((l = argvars[0].vval.v_list) != NULL
11402 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
11403     {
11404 	if (argvars[2].v_type != VAR_UNKNOWN)
11405 	    before = get_tv_number_chk(&argvars[2], &error);
11406 	if (error)
11407 	    return;		/* type error; errmsg already given */
11408 
11409 	if (before == l->lv_len)
11410 	    item = NULL;
11411 	else
11412 	{
11413 	    item = list_find(l, before);
11414 	    if (item == NULL)
11415 	    {
11416 		EMSGN(_(e_listidx), before);
11417 		l = NULL;
11418 	    }
11419 	}
11420 	if (l != NULL)
11421 	{
11422 	    list_insert_tv(l, &argvars[1], item);
11423 	    copy_tv(&argvars[0], rettv);
11424 	}
11425     }
11426 }
11427 
11428 /*
11429  * "isdirectory()" function
11430  */
11431     static void
11432 f_isdirectory(argvars, rettv)
11433     typval_T	*argvars;
11434     typval_T	*rettv;
11435 {
11436     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
11437 }
11438 
11439 /*
11440  * "islocked()" function
11441  */
11442     static void
11443 f_islocked(argvars, rettv)
11444     typval_T	*argvars;
11445     typval_T	*rettv;
11446 {
11447     lval_T	lv;
11448     char_u	*end;
11449     dictitem_T	*di;
11450 
11451     rettv->vval.v_number = -1;
11452     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
11453 							     FNE_CHECK_START);
11454     if (end != NULL && lv.ll_name != NULL)
11455     {
11456 	if (*end != NUL)
11457 	    EMSG(_(e_trailing));
11458 	else
11459 	{
11460 	    if (lv.ll_tv == NULL)
11461 	    {
11462 		if (check_changedtick(lv.ll_name))
11463 		    rettv->vval.v_number = 1;	    /* always locked */
11464 		else
11465 		{
11466 		    di = find_var(lv.ll_name, NULL);
11467 		    if (di != NULL)
11468 		    {
11469 			/* Consider a variable locked when:
11470 			 * 1. the variable itself is locked
11471 			 * 2. the value of the variable is locked.
11472 			 * 3. the List or Dict value is locked.
11473 			 */
11474 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11475 						  || tv_islocked(&di->di_tv));
11476 		    }
11477 		}
11478 	    }
11479 	    else if (lv.ll_range)
11480 		EMSG(_("E745: Range not allowed"));
11481 	    else if (lv.ll_newkey != NULL)
11482 		EMSG2(_(e_dictkey), lv.ll_newkey);
11483 	    else if (lv.ll_list != NULL)
11484 		/* List item. */
11485 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11486 	    else
11487 		/* Dictionary item. */
11488 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11489 	}
11490     }
11491 
11492     clear_lval(&lv);
11493 }
11494 
11495 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11496 
11497 /*
11498  * Turn a dict into a list:
11499  * "what" == 0: list of keys
11500  * "what" == 1: list of values
11501  * "what" == 2: list of items
11502  */
11503     static void
11504 dict_list(argvars, rettv, what)
11505     typval_T	*argvars;
11506     typval_T	*rettv;
11507     int		what;
11508 {
11509     list_T	*l2;
11510     dictitem_T	*di;
11511     hashitem_T	*hi;
11512     listitem_T	*li;
11513     listitem_T	*li2;
11514     dict_T	*d;
11515     int		todo;
11516 
11517     rettv->vval.v_number = 0;
11518     if (argvars[0].v_type != VAR_DICT)
11519     {
11520 	EMSG(_(e_dictreq));
11521 	return;
11522     }
11523     if ((d = argvars[0].vval.v_dict) == NULL)
11524 	return;
11525 
11526     if (rettv_list_alloc(rettv) == FAIL)
11527 	return;
11528 
11529     todo = d->dv_hashtab.ht_used;
11530     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11531     {
11532 	if (!HASHITEM_EMPTY(hi))
11533 	{
11534 	    --todo;
11535 	    di = HI2DI(hi);
11536 
11537 	    li = listitem_alloc();
11538 	    if (li == NULL)
11539 		break;
11540 	    list_append(rettv->vval.v_list, li);
11541 
11542 	    if (what == 0)
11543 	    {
11544 		/* keys() */
11545 		li->li_tv.v_type = VAR_STRING;
11546 		li->li_tv.v_lock = 0;
11547 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11548 	    }
11549 	    else if (what == 1)
11550 	    {
11551 		/* values() */
11552 		copy_tv(&di->di_tv, &li->li_tv);
11553 	    }
11554 	    else
11555 	    {
11556 		/* items() */
11557 		l2 = list_alloc();
11558 		li->li_tv.v_type = VAR_LIST;
11559 		li->li_tv.v_lock = 0;
11560 		li->li_tv.vval.v_list = l2;
11561 		if (l2 == NULL)
11562 		    break;
11563 		++l2->lv_refcount;
11564 
11565 		li2 = listitem_alloc();
11566 		if (li2 == NULL)
11567 		    break;
11568 		list_append(l2, li2);
11569 		li2->li_tv.v_type = VAR_STRING;
11570 		li2->li_tv.v_lock = 0;
11571 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11572 
11573 		li2 = listitem_alloc();
11574 		if (li2 == NULL)
11575 		    break;
11576 		list_append(l2, li2);
11577 		copy_tv(&di->di_tv, &li2->li_tv);
11578 	    }
11579 	}
11580     }
11581 }
11582 
11583 /*
11584  * "items(dict)" function
11585  */
11586     static void
11587 f_items(argvars, rettv)
11588     typval_T	*argvars;
11589     typval_T	*rettv;
11590 {
11591     dict_list(argvars, rettv, 2);
11592 }
11593 
11594 /*
11595  * "join()" function
11596  */
11597     static void
11598 f_join(argvars, rettv)
11599     typval_T	*argvars;
11600     typval_T	*rettv;
11601 {
11602     garray_T	ga;
11603     char_u	*sep;
11604 
11605     rettv->vval.v_number = 0;
11606     if (argvars[0].v_type != VAR_LIST)
11607     {
11608 	EMSG(_(e_listreq));
11609 	return;
11610     }
11611     if (argvars[0].vval.v_list == NULL)
11612 	return;
11613     if (argvars[1].v_type == VAR_UNKNOWN)
11614 	sep = (char_u *)" ";
11615     else
11616 	sep = get_tv_string_chk(&argvars[1]);
11617 
11618     rettv->v_type = VAR_STRING;
11619 
11620     if (sep != NULL)
11621     {
11622 	ga_init2(&ga, (int)sizeof(char), 80);
11623 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE, 0);
11624 	ga_append(&ga, NUL);
11625 	rettv->vval.v_string = (char_u *)ga.ga_data;
11626     }
11627     else
11628 	rettv->vval.v_string = NULL;
11629 }
11630 
11631 /*
11632  * "keys()" function
11633  */
11634     static void
11635 f_keys(argvars, rettv)
11636     typval_T	*argvars;
11637     typval_T	*rettv;
11638 {
11639     dict_list(argvars, rettv, 0);
11640 }
11641 
11642 /*
11643  * "last_buffer_nr()" function.
11644  */
11645 /*ARGSUSED*/
11646     static void
11647 f_last_buffer_nr(argvars, rettv)
11648     typval_T	*argvars;
11649     typval_T	*rettv;
11650 {
11651     int		n = 0;
11652     buf_T	*buf;
11653 
11654     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11655 	if (n < buf->b_fnum)
11656 	    n = buf->b_fnum;
11657 
11658     rettv->vval.v_number = n;
11659 }
11660 
11661 /*
11662  * "len()" function
11663  */
11664     static void
11665 f_len(argvars, rettv)
11666     typval_T	*argvars;
11667     typval_T	*rettv;
11668 {
11669     switch (argvars[0].v_type)
11670     {
11671 	case VAR_STRING:
11672 	case VAR_NUMBER:
11673 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11674 					       get_tv_string(&argvars[0]));
11675 	    break;
11676 	case VAR_LIST:
11677 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11678 	    break;
11679 	case VAR_DICT:
11680 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11681 	    break;
11682 	default:
11683 	    EMSG(_("E701: Invalid type for len()"));
11684 	    break;
11685     }
11686 }
11687 
11688 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11689 
11690     static void
11691 libcall_common(argvars, rettv, type)
11692     typval_T	*argvars;
11693     typval_T	*rettv;
11694     int		type;
11695 {
11696 #ifdef FEAT_LIBCALL
11697     char_u		*string_in;
11698     char_u		**string_result;
11699     int			nr_result;
11700 #endif
11701 
11702     rettv->v_type = type;
11703     if (type == VAR_NUMBER)
11704 	rettv->vval.v_number = 0;
11705     else
11706 	rettv->vval.v_string = NULL;
11707 
11708     if (check_restricted() || check_secure())
11709 	return;
11710 
11711 #ifdef FEAT_LIBCALL
11712     /* The first two args must be strings, otherwise its meaningless */
11713     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11714     {
11715 	string_in = NULL;
11716 	if (argvars[2].v_type == VAR_STRING)
11717 	    string_in = argvars[2].vval.v_string;
11718 	if (type == VAR_NUMBER)
11719 	    string_result = NULL;
11720 	else
11721 	    string_result = &rettv->vval.v_string;
11722 	if (mch_libcall(argvars[0].vval.v_string,
11723 			     argvars[1].vval.v_string,
11724 			     string_in,
11725 			     argvars[2].vval.v_number,
11726 			     string_result,
11727 			     &nr_result) == OK
11728 		&& type == VAR_NUMBER)
11729 	    rettv->vval.v_number = nr_result;
11730     }
11731 #endif
11732 }
11733 
11734 /*
11735  * "libcall()" function
11736  */
11737     static void
11738 f_libcall(argvars, rettv)
11739     typval_T	*argvars;
11740     typval_T	*rettv;
11741 {
11742     libcall_common(argvars, rettv, VAR_STRING);
11743 }
11744 
11745 /*
11746  * "libcallnr()" function
11747  */
11748     static void
11749 f_libcallnr(argvars, rettv)
11750     typval_T	*argvars;
11751     typval_T	*rettv;
11752 {
11753     libcall_common(argvars, rettv, VAR_NUMBER);
11754 }
11755 
11756 /*
11757  * "line(string)" function
11758  */
11759     static void
11760 f_line(argvars, rettv)
11761     typval_T	*argvars;
11762     typval_T	*rettv;
11763 {
11764     linenr_T	lnum = 0;
11765     pos_T	*fp;
11766     int		fnum;
11767 
11768     fp = var2fpos(&argvars[0], TRUE, &fnum);
11769     if (fp != NULL)
11770 	lnum = fp->lnum;
11771     rettv->vval.v_number = lnum;
11772 }
11773 
11774 /*
11775  * "line2byte(lnum)" function
11776  */
11777 /*ARGSUSED*/
11778     static void
11779 f_line2byte(argvars, rettv)
11780     typval_T	*argvars;
11781     typval_T	*rettv;
11782 {
11783 #ifndef FEAT_BYTEOFF
11784     rettv->vval.v_number = -1;
11785 #else
11786     linenr_T	lnum;
11787 
11788     lnum = get_tv_lnum(argvars);
11789     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11790 	rettv->vval.v_number = -1;
11791     else
11792 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11793     if (rettv->vval.v_number >= 0)
11794 	++rettv->vval.v_number;
11795 #endif
11796 }
11797 
11798 /*
11799  * "lispindent(lnum)" function
11800  */
11801     static void
11802 f_lispindent(argvars, rettv)
11803     typval_T	*argvars;
11804     typval_T	*rettv;
11805 {
11806 #ifdef FEAT_LISP
11807     pos_T	pos;
11808     linenr_T	lnum;
11809 
11810     pos = curwin->w_cursor;
11811     lnum = get_tv_lnum(argvars);
11812     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11813     {
11814 	curwin->w_cursor.lnum = lnum;
11815 	rettv->vval.v_number = get_lisp_indent();
11816 	curwin->w_cursor = pos;
11817     }
11818     else
11819 #endif
11820 	rettv->vval.v_number = -1;
11821 }
11822 
11823 /*
11824  * "localtime()" function
11825  */
11826 /*ARGSUSED*/
11827     static void
11828 f_localtime(argvars, rettv)
11829     typval_T	*argvars;
11830     typval_T	*rettv;
11831 {
11832     rettv->vval.v_number = (varnumber_T)time(NULL);
11833 }
11834 
11835 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11836 
11837     static void
11838 get_maparg(argvars, rettv, exact)
11839     typval_T	*argvars;
11840     typval_T	*rettv;
11841     int		exact;
11842 {
11843     char_u	*keys;
11844     char_u	*which;
11845     char_u	buf[NUMBUFLEN];
11846     char_u	*keys_buf = NULL;
11847     char_u	*rhs;
11848     int		mode;
11849     garray_T	ga;
11850     int		abbr = FALSE;
11851 
11852     /* return empty string for failure */
11853     rettv->v_type = VAR_STRING;
11854     rettv->vval.v_string = NULL;
11855 
11856     keys = get_tv_string(&argvars[0]);
11857     if (*keys == NUL)
11858 	return;
11859 
11860     if (argvars[1].v_type != VAR_UNKNOWN)
11861     {
11862 	which = get_tv_string_buf_chk(&argvars[1], buf);
11863 	if (argvars[2].v_type != VAR_UNKNOWN)
11864 	    abbr = get_tv_number(&argvars[2]);
11865     }
11866     else
11867 	which = (char_u *)"";
11868     if (which == NULL)
11869 	return;
11870 
11871     mode = get_map_mode(&which, 0);
11872 
11873     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11874     rhs = check_map(keys, mode, exact, FALSE, abbr);
11875     vim_free(keys_buf);
11876     if (rhs != NULL)
11877     {
11878 	ga_init(&ga);
11879 	ga.ga_itemsize = 1;
11880 	ga.ga_growsize = 40;
11881 
11882 	while (*rhs != NUL)
11883 	    ga_concat(&ga, str2special(&rhs, FALSE));
11884 
11885 	ga_append(&ga, NUL);
11886 	rettv->vval.v_string = (char_u *)ga.ga_data;
11887     }
11888 }
11889 
11890 /*
11891  * "map()" function
11892  */
11893     static void
11894 f_map(argvars, rettv)
11895     typval_T	*argvars;
11896     typval_T	*rettv;
11897 {
11898     filter_map(argvars, rettv, TRUE);
11899 }
11900 
11901 /*
11902  * "maparg()" function
11903  */
11904     static void
11905 f_maparg(argvars, rettv)
11906     typval_T	*argvars;
11907     typval_T	*rettv;
11908 {
11909     get_maparg(argvars, rettv, TRUE);
11910 }
11911 
11912 /*
11913  * "mapcheck()" function
11914  */
11915     static void
11916 f_mapcheck(argvars, rettv)
11917     typval_T	*argvars;
11918     typval_T	*rettv;
11919 {
11920     get_maparg(argvars, rettv, FALSE);
11921 }
11922 
11923 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11924 
11925     static void
11926 find_some_match(argvars, rettv, type)
11927     typval_T	*argvars;
11928     typval_T	*rettv;
11929     int		type;
11930 {
11931     char_u	*str = NULL;
11932     char_u	*expr = NULL;
11933     char_u	*pat;
11934     regmatch_T	regmatch;
11935     char_u	patbuf[NUMBUFLEN];
11936     char_u	strbuf[NUMBUFLEN];
11937     char_u	*save_cpo;
11938     long	start = 0;
11939     long	nth = 1;
11940     colnr_T	startcol = 0;
11941     int		match = 0;
11942     list_T	*l = NULL;
11943     listitem_T	*li = NULL;
11944     long	idx = 0;
11945     char_u	*tofree = NULL;
11946 
11947     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11948     save_cpo = p_cpo;
11949     p_cpo = (char_u *)"";
11950 
11951     rettv->vval.v_number = -1;
11952     if (type == 3)
11953     {
11954 	/* return empty list when there are no matches */
11955 	if (rettv_list_alloc(rettv) == FAIL)
11956 	    goto theend;
11957     }
11958     else if (type == 2)
11959     {
11960 	rettv->v_type = VAR_STRING;
11961 	rettv->vval.v_string = NULL;
11962     }
11963 
11964     if (argvars[0].v_type == VAR_LIST)
11965     {
11966 	if ((l = argvars[0].vval.v_list) == NULL)
11967 	    goto theend;
11968 	li = l->lv_first;
11969     }
11970     else
11971 	expr = str = get_tv_string(&argvars[0]);
11972 
11973     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11974     if (pat == NULL)
11975 	goto theend;
11976 
11977     if (argvars[2].v_type != VAR_UNKNOWN)
11978     {
11979 	int	    error = FALSE;
11980 
11981 	start = get_tv_number_chk(&argvars[2], &error);
11982 	if (error)
11983 	    goto theend;
11984 	if (l != NULL)
11985 	{
11986 	    li = list_find(l, start);
11987 	    if (li == NULL)
11988 		goto theend;
11989 	    idx = l->lv_idx;	/* use the cached index */
11990 	}
11991 	else
11992 	{
11993 	    if (start < 0)
11994 		start = 0;
11995 	    if (start > (long)STRLEN(str))
11996 		goto theend;
11997 	    /* When "count" argument is there ignore matches before "start",
11998 	     * otherwise skip part of the string.  Differs when pattern is "^"
11999 	     * or "\<". */
12000 	    if (argvars[3].v_type != VAR_UNKNOWN)
12001 		startcol = start;
12002 	    else
12003 		str += start;
12004 	}
12005 
12006 	if (argvars[3].v_type != VAR_UNKNOWN)
12007 	    nth = get_tv_number_chk(&argvars[3], &error);
12008 	if (error)
12009 	    goto theend;
12010     }
12011 
12012     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
12013     if (regmatch.regprog != NULL)
12014     {
12015 	regmatch.rm_ic = p_ic;
12016 
12017 	for (;;)
12018 	{
12019 	    if (l != NULL)
12020 	    {
12021 		if (li == NULL)
12022 		{
12023 		    match = FALSE;
12024 		    break;
12025 		}
12026 		vim_free(tofree);
12027 		str = echo_string(&li->li_tv, &tofree, strbuf, 0);
12028 		if (str == NULL)
12029 		    break;
12030 	    }
12031 
12032 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)startcol);
12033 
12034 	    if (match && --nth <= 0)
12035 		break;
12036 	    if (l == NULL && !match)
12037 		break;
12038 
12039 	    /* Advance to just after the match. */
12040 	    if (l != NULL)
12041 	    {
12042 		li = li->li_next;
12043 		++idx;
12044 	    }
12045 	    else
12046 	    {
12047 #ifdef FEAT_MBYTE
12048 		startcol = regmatch.startp[0]
12049 				    + (*mb_ptr2len)(regmatch.startp[0]) - str;
12050 #else
12051 		startcol = regmatch.startp[0] + 1 - str;
12052 #endif
12053 	    }
12054 	}
12055 
12056 	if (match)
12057 	{
12058 	    if (type == 3)
12059 	    {
12060 		int i;
12061 
12062 		/* return list with matched string and submatches */
12063 		for (i = 0; i < NSUBEXP; ++i)
12064 		{
12065 		    if (regmatch.endp[i] == NULL)
12066 			break;
12067 		    if (list_append_string(rettv->vval.v_list,
12068 				regmatch.startp[i],
12069 				(int)(regmatch.endp[i] - regmatch.startp[i]))
12070 			    == FAIL)
12071 			break;
12072 		}
12073 	    }
12074 	    else if (type == 2)
12075 	    {
12076 		/* return matched string */
12077 		if (l != NULL)
12078 		    copy_tv(&li->li_tv, rettv);
12079 		else
12080 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
12081 				(int)(regmatch.endp[0] - regmatch.startp[0]));
12082 	    }
12083 	    else if (l != NULL)
12084 		rettv->vval.v_number = idx;
12085 	    else
12086 	    {
12087 		if (type != 0)
12088 		    rettv->vval.v_number =
12089 				      (varnumber_T)(regmatch.startp[0] - str);
12090 		else
12091 		    rettv->vval.v_number =
12092 					(varnumber_T)(regmatch.endp[0] - str);
12093 		rettv->vval.v_number += str - expr;
12094 	    }
12095 	}
12096 	vim_free(regmatch.regprog);
12097     }
12098 
12099 theend:
12100     vim_free(tofree);
12101     p_cpo = save_cpo;
12102 }
12103 
12104 /*
12105  * "match()" function
12106  */
12107     static void
12108 f_match(argvars, rettv)
12109     typval_T	*argvars;
12110     typval_T	*rettv;
12111 {
12112     find_some_match(argvars, rettv, 1);
12113 }
12114 
12115 /*
12116  * "matchend()" function
12117  */
12118     static void
12119 f_matchend(argvars, rettv)
12120     typval_T	*argvars;
12121     typval_T	*rettv;
12122 {
12123     find_some_match(argvars, rettv, 0);
12124 }
12125 
12126 /*
12127  * "matchlist()" function
12128  */
12129     static void
12130 f_matchlist(argvars, rettv)
12131     typval_T	*argvars;
12132     typval_T	*rettv;
12133 {
12134     find_some_match(argvars, rettv, 3);
12135 }
12136 
12137 /*
12138  * "matchstr()" function
12139  */
12140     static void
12141 f_matchstr(argvars, rettv)
12142     typval_T	*argvars;
12143     typval_T	*rettv;
12144 {
12145     find_some_match(argvars, rettv, 2);
12146 }
12147 
12148 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
12149 
12150     static void
12151 max_min(argvars, rettv, domax)
12152     typval_T	*argvars;
12153     typval_T	*rettv;
12154     int		domax;
12155 {
12156     long	n = 0;
12157     long	i;
12158     int		error = FALSE;
12159 
12160     if (argvars[0].v_type == VAR_LIST)
12161     {
12162 	list_T		*l;
12163 	listitem_T	*li;
12164 
12165 	l = argvars[0].vval.v_list;
12166 	if (l != NULL)
12167 	{
12168 	    li = l->lv_first;
12169 	    if (li != NULL)
12170 	    {
12171 		n = get_tv_number_chk(&li->li_tv, &error);
12172 		for (;;)
12173 		{
12174 		    li = li->li_next;
12175 		    if (li == NULL)
12176 			break;
12177 		    i = get_tv_number_chk(&li->li_tv, &error);
12178 		    if (domax ? i > n : i < n)
12179 			n = i;
12180 		}
12181 	    }
12182 	}
12183     }
12184     else if (argvars[0].v_type == VAR_DICT)
12185     {
12186 	dict_T		*d;
12187 	int		first = TRUE;
12188 	hashitem_T	*hi;
12189 	int		todo;
12190 
12191 	d = argvars[0].vval.v_dict;
12192 	if (d != NULL)
12193 	{
12194 	    todo = d->dv_hashtab.ht_used;
12195 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
12196 	    {
12197 		if (!HASHITEM_EMPTY(hi))
12198 		{
12199 		    --todo;
12200 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
12201 		    if (first)
12202 		    {
12203 			n = i;
12204 			first = FALSE;
12205 		    }
12206 		    else if (domax ? i > n : i < n)
12207 			n = i;
12208 		}
12209 	    }
12210 	}
12211     }
12212     else
12213 	EMSG(_(e_listdictarg));
12214     rettv->vval.v_number = error ? 0 : n;
12215 }
12216 
12217 /*
12218  * "max()" function
12219  */
12220     static void
12221 f_max(argvars, rettv)
12222     typval_T	*argvars;
12223     typval_T	*rettv;
12224 {
12225     max_min(argvars, rettv, TRUE);
12226 }
12227 
12228 /*
12229  * "min()" function
12230  */
12231     static void
12232 f_min(argvars, rettv)
12233     typval_T	*argvars;
12234     typval_T	*rettv;
12235 {
12236     max_min(argvars, rettv, FALSE);
12237 }
12238 
12239 static int mkdir_recurse __ARGS((char_u *dir, int prot));
12240 
12241 /*
12242  * Create the directory in which "dir" is located, and higher levels when
12243  * needed.
12244  */
12245     static int
12246 mkdir_recurse(dir, prot)
12247     char_u	*dir;
12248     int		prot;
12249 {
12250     char_u	*p;
12251     char_u	*updir;
12252     int		r = FAIL;
12253 
12254     /* Get end of directory name in "dir".
12255      * We're done when it's "/" or "c:/". */
12256     p = gettail_sep(dir);
12257     if (p <= get_past_head(dir))
12258 	return OK;
12259 
12260     /* If the directory exists we're done.  Otherwise: create it.*/
12261     updir = vim_strnsave(dir, (int)(p - dir));
12262     if (updir == NULL)
12263 	return FAIL;
12264     if (mch_isdir(updir))
12265 	r = OK;
12266     else if (mkdir_recurse(updir, prot) == OK)
12267 	r = vim_mkdir_emsg(updir, prot);
12268     vim_free(updir);
12269     return r;
12270 }
12271 
12272 #ifdef vim_mkdir
12273 /*
12274  * "mkdir()" function
12275  */
12276     static void
12277 f_mkdir(argvars, rettv)
12278     typval_T	*argvars;
12279     typval_T	*rettv;
12280 {
12281     char_u	*dir;
12282     char_u	buf[NUMBUFLEN];
12283     int		prot = 0755;
12284 
12285     rettv->vval.v_number = FAIL;
12286     if (check_restricted() || check_secure())
12287 	return;
12288 
12289     dir = get_tv_string_buf(&argvars[0], buf);
12290     if (argvars[1].v_type != VAR_UNKNOWN)
12291     {
12292 	if (argvars[2].v_type != VAR_UNKNOWN)
12293 	    prot = get_tv_number_chk(&argvars[2], NULL);
12294 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
12295 	    mkdir_recurse(dir, prot);
12296     }
12297     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
12298 }
12299 #endif
12300 
12301 /*
12302  * "mode()" function
12303  */
12304 /*ARGSUSED*/
12305     static void
12306 f_mode(argvars, rettv)
12307     typval_T	*argvars;
12308     typval_T	*rettv;
12309 {
12310     char_u	buf[2];
12311 
12312 #ifdef FEAT_VISUAL
12313     if (VIsual_active)
12314     {
12315 	if (VIsual_select)
12316 	    buf[0] = VIsual_mode + 's' - 'v';
12317 	else
12318 	    buf[0] = VIsual_mode;
12319     }
12320     else
12321 #endif
12322 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
12323 	buf[0] = 'r';
12324     else if (State & INSERT)
12325     {
12326 	if (State & REPLACE_FLAG)
12327 	    buf[0] = 'R';
12328 	else
12329 	    buf[0] = 'i';
12330     }
12331     else if (State & CMDLINE)
12332 	buf[0] = 'c';
12333     else
12334 	buf[0] = 'n';
12335 
12336     buf[1] = NUL;
12337     rettv->vval.v_string = vim_strsave(buf);
12338     rettv->v_type = VAR_STRING;
12339 }
12340 
12341 /*
12342  * "nextnonblank()" function
12343  */
12344     static void
12345 f_nextnonblank(argvars, rettv)
12346     typval_T	*argvars;
12347     typval_T	*rettv;
12348 {
12349     linenr_T	lnum;
12350 
12351     for (lnum = get_tv_lnum(argvars); ; ++lnum)
12352     {
12353 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
12354 	{
12355 	    lnum = 0;
12356 	    break;
12357 	}
12358 	if (*skipwhite(ml_get(lnum)) != NUL)
12359 	    break;
12360     }
12361     rettv->vval.v_number = lnum;
12362 }
12363 
12364 /*
12365  * "nr2char()" function
12366  */
12367     static void
12368 f_nr2char(argvars, rettv)
12369     typval_T	*argvars;
12370     typval_T	*rettv;
12371 {
12372     char_u	buf[NUMBUFLEN];
12373 
12374 #ifdef FEAT_MBYTE
12375     if (has_mbyte)
12376 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
12377     else
12378 #endif
12379     {
12380 	buf[0] = (char_u)get_tv_number(&argvars[0]);
12381 	buf[1] = NUL;
12382     }
12383     rettv->v_type = VAR_STRING;
12384     rettv->vval.v_string = vim_strsave(buf);
12385 }
12386 
12387 /*
12388  * "prevnonblank()" function
12389  */
12390     static void
12391 f_prevnonblank(argvars, rettv)
12392     typval_T	*argvars;
12393     typval_T	*rettv;
12394 {
12395     linenr_T	lnum;
12396 
12397     lnum = get_tv_lnum(argvars);
12398     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
12399 	lnum = 0;
12400     else
12401 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
12402 	    --lnum;
12403     rettv->vval.v_number = lnum;
12404 }
12405 
12406 #ifdef HAVE_STDARG_H
12407 /* This dummy va_list is here because:
12408  * - passing a NULL pointer doesn't work when va_list isn't a pointer
12409  * - locally in the function results in a "used before set" warning
12410  * - using va_start() to initialize it gives "function with fixed args" error */
12411 static va_list	ap;
12412 #endif
12413 
12414 /*
12415  * "printf()" function
12416  */
12417     static void
12418 f_printf(argvars, rettv)
12419     typval_T	*argvars;
12420     typval_T	*rettv;
12421 {
12422     rettv->v_type = VAR_STRING;
12423     rettv->vval.v_string = NULL;
12424 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
12425     {
12426 	char_u	buf[NUMBUFLEN];
12427 	int	len;
12428 	char_u	*s;
12429 	int	saved_did_emsg = did_emsg;
12430 	char	*fmt;
12431 
12432 	/* Get the required length, allocate the buffer and do it for real. */
12433 	did_emsg = FALSE;
12434 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
12435 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
12436 	if (!did_emsg)
12437 	{
12438 	    s = alloc(len + 1);
12439 	    if (s != NULL)
12440 	    {
12441 		rettv->vval.v_string = s;
12442 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
12443 	    }
12444 	}
12445 	did_emsg |= saved_did_emsg;
12446     }
12447 #endif
12448 }
12449 
12450 /*
12451  * "pumvisible()" function
12452  */
12453 /*ARGSUSED*/
12454     static void
12455 f_pumvisible(argvars, rettv)
12456     typval_T	*argvars;
12457     typval_T	*rettv;
12458 {
12459     rettv->vval.v_number = 0;
12460 #ifdef FEAT_INS_EXPAND
12461     if (pum_visible())
12462 	rettv->vval.v_number = 1;
12463 #endif
12464 }
12465 
12466 /*
12467  * "range()" function
12468  */
12469     static void
12470 f_range(argvars, rettv)
12471     typval_T	*argvars;
12472     typval_T	*rettv;
12473 {
12474     long	start;
12475     long	end;
12476     long	stride = 1;
12477     long	i;
12478     int		error = FALSE;
12479 
12480     start = get_tv_number_chk(&argvars[0], &error);
12481     if (argvars[1].v_type == VAR_UNKNOWN)
12482     {
12483 	end = start - 1;
12484 	start = 0;
12485     }
12486     else
12487     {
12488 	end = get_tv_number_chk(&argvars[1], &error);
12489 	if (argvars[2].v_type != VAR_UNKNOWN)
12490 	    stride = get_tv_number_chk(&argvars[2], &error);
12491     }
12492 
12493     rettv->vval.v_number = 0;
12494     if (error)
12495 	return;		/* type error; errmsg already given */
12496     if (stride == 0)
12497 	EMSG(_("E726: Stride is zero"));
12498     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12499 	EMSG(_("E727: Start past end"));
12500     else
12501     {
12502 	if (rettv_list_alloc(rettv) == OK)
12503 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12504 		if (list_append_number(rettv->vval.v_list,
12505 						      (varnumber_T)i) == FAIL)
12506 		    break;
12507     }
12508 }
12509 
12510 /*
12511  * "readfile()" function
12512  */
12513     static void
12514 f_readfile(argvars, rettv)
12515     typval_T	*argvars;
12516     typval_T	*rettv;
12517 {
12518     int		binary = FALSE;
12519     char_u	*fname;
12520     FILE	*fd;
12521     listitem_T	*li;
12522 #define FREAD_SIZE 200	    /* optimized for text lines */
12523     char_u	buf[FREAD_SIZE];
12524     int		readlen;    /* size of last fread() */
12525     int		buflen;	    /* nr of valid chars in buf[] */
12526     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12527     int		tolist;	    /* first byte in buf[] still to be put in list */
12528     int		chop;	    /* how many CR to chop off */
12529     char_u	*prev = NULL;	/* previously read bytes, if any */
12530     int		prevlen = 0;    /* length of "prev" if not NULL */
12531     char_u	*s;
12532     int		len;
12533     long	maxline = MAXLNUM;
12534     long	cnt = 0;
12535 
12536     if (argvars[1].v_type != VAR_UNKNOWN)
12537     {
12538 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12539 	    binary = TRUE;
12540 	if (argvars[2].v_type != VAR_UNKNOWN)
12541 	    maxline = get_tv_number(&argvars[2]);
12542     }
12543 
12544     if (rettv_list_alloc(rettv) == FAIL)
12545 	return;
12546 
12547     /* Always open the file in binary mode, library functions have a mind of
12548      * their own about CR-LF conversion. */
12549     fname = get_tv_string(&argvars[0]);
12550     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12551     {
12552 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12553 	return;
12554     }
12555 
12556     filtd = 0;
12557     while (cnt < maxline || maxline < 0)
12558     {
12559 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12560 	buflen = filtd + readlen;
12561 	tolist = 0;
12562 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12563 	{
12564 	    if (buf[filtd] == '\n' || readlen <= 0)
12565 	    {
12566 		/* Only when in binary mode add an empty list item when the
12567 		 * last line ends in a '\n'. */
12568 		if (!binary && readlen == 0 && filtd == 0)
12569 		    break;
12570 
12571 		/* Found end-of-line or end-of-file: add a text line to the
12572 		 * list. */
12573 		chop = 0;
12574 		if (!binary)
12575 		    while (filtd - chop - 1 >= tolist
12576 					  && buf[filtd - chop - 1] == '\r')
12577 			++chop;
12578 		len = filtd - tolist - chop;
12579 		if (prev == NULL)
12580 		    s = vim_strnsave(buf + tolist, len);
12581 		else
12582 		{
12583 		    s = alloc((unsigned)(prevlen + len + 1));
12584 		    if (s != NULL)
12585 		    {
12586 			mch_memmove(s, prev, prevlen);
12587 			vim_free(prev);
12588 			prev = NULL;
12589 			mch_memmove(s + prevlen, buf + tolist, len);
12590 			s[prevlen + len] = NUL;
12591 		    }
12592 		}
12593 		tolist = filtd + 1;
12594 
12595 		li = listitem_alloc();
12596 		if (li == NULL)
12597 		{
12598 		    vim_free(s);
12599 		    break;
12600 		}
12601 		li->li_tv.v_type = VAR_STRING;
12602 		li->li_tv.v_lock = 0;
12603 		li->li_tv.vval.v_string = s;
12604 		list_append(rettv->vval.v_list, li);
12605 
12606 		if (++cnt >= maxline && maxline >= 0)
12607 		    break;
12608 		if (readlen <= 0)
12609 		    break;
12610 	    }
12611 	    else if (buf[filtd] == NUL)
12612 		buf[filtd] = '\n';
12613 	}
12614 	if (readlen <= 0)
12615 	    break;
12616 
12617 	if (tolist == 0)
12618 	{
12619 	    /* "buf" is full, need to move text to an allocated buffer */
12620 	    if (prev == NULL)
12621 	    {
12622 		prev = vim_strnsave(buf, buflen);
12623 		prevlen = buflen;
12624 	    }
12625 	    else
12626 	    {
12627 		s = alloc((unsigned)(prevlen + buflen));
12628 		if (s != NULL)
12629 		{
12630 		    mch_memmove(s, prev, prevlen);
12631 		    mch_memmove(s + prevlen, buf, buflen);
12632 		    vim_free(prev);
12633 		    prev = s;
12634 		    prevlen += buflen;
12635 		}
12636 	    }
12637 	    filtd = 0;
12638 	}
12639 	else
12640 	{
12641 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12642 	    filtd -= tolist;
12643 	}
12644     }
12645 
12646     /*
12647      * For a negative line count use only the lines at the end of the file,
12648      * free the rest.
12649      */
12650     if (maxline < 0)
12651 	while (cnt > -maxline)
12652 	{
12653 	    listitem_remove(rettv->vval.v_list, rettv->vval.v_list->lv_first);
12654 	    --cnt;
12655 	}
12656 
12657     vim_free(prev);
12658     fclose(fd);
12659 }
12660 
12661 #if defined(FEAT_RELTIME)
12662 static int list2proftime __ARGS((typval_T *arg, proftime_T *tm));
12663 
12664 /*
12665  * Convert a List to proftime_T.
12666  * Return FAIL when there is something wrong.
12667  */
12668     static int
12669 list2proftime(arg, tm)
12670     typval_T	*arg;
12671     proftime_T  *tm;
12672 {
12673     long	n1, n2;
12674     int	error = FALSE;
12675 
12676     if (arg->v_type != VAR_LIST || arg->vval.v_list == NULL
12677 					     || arg->vval.v_list->lv_len != 2)
12678 	return FAIL;
12679     n1 = list_find_nr(arg->vval.v_list, 0L, &error);
12680     n2 = list_find_nr(arg->vval.v_list, 1L, &error);
12681 # ifdef WIN3264
12682     tm->HighPart = n1;
12683     tm->LowPart = n2;
12684 # else
12685     tm->tv_sec = n1;
12686     tm->tv_usec = n2;
12687 # endif
12688     return error ? FAIL : OK;
12689 }
12690 #endif /* FEAT_RELTIME */
12691 
12692 /*
12693  * "reltime()" function
12694  */
12695     static void
12696 f_reltime(argvars, rettv)
12697     typval_T	*argvars;
12698     typval_T	*rettv;
12699 {
12700 #ifdef FEAT_RELTIME
12701     proftime_T	res;
12702     proftime_T	start;
12703 
12704     if (argvars[0].v_type == VAR_UNKNOWN)
12705     {
12706 	/* No arguments: get current time. */
12707 	profile_start(&res);
12708     }
12709     else if (argvars[1].v_type == VAR_UNKNOWN)
12710     {
12711 	if (list2proftime(&argvars[0], &res) == FAIL)
12712 	    return;
12713 	profile_end(&res);
12714     }
12715     else
12716     {
12717 	/* Two arguments: compute the difference. */
12718 	if (list2proftime(&argvars[0], &start) == FAIL
12719 		|| list2proftime(&argvars[1], &res) == FAIL)
12720 	    return;
12721 	profile_sub(&res, &start);
12722     }
12723 
12724     if (rettv_list_alloc(rettv) == OK)
12725     {
12726 	long	n1, n2;
12727 
12728 # ifdef WIN3264
12729 	n1 = res.HighPart;
12730 	n2 = res.LowPart;
12731 # else
12732 	n1 = res.tv_sec;
12733 	n2 = res.tv_usec;
12734 # endif
12735 	list_append_number(rettv->vval.v_list, (varnumber_T)n1);
12736 	list_append_number(rettv->vval.v_list, (varnumber_T)n2);
12737     }
12738 #endif
12739 }
12740 
12741 /*
12742  * "reltimestr()" function
12743  */
12744     static void
12745 f_reltimestr(argvars, rettv)
12746     typval_T	*argvars;
12747     typval_T	*rettv;
12748 {
12749 #ifdef FEAT_RELTIME
12750     proftime_T	tm;
12751 #endif
12752 
12753     rettv->v_type = VAR_STRING;
12754     rettv->vval.v_string = NULL;
12755 #ifdef FEAT_RELTIME
12756     if (list2proftime(&argvars[0], &tm) == OK)
12757 	rettv->vval.v_string = vim_strsave((char_u *)profile_msg(&tm));
12758 #endif
12759 }
12760 
12761 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12762 static void make_connection __ARGS((void));
12763 static int check_connection __ARGS((void));
12764 
12765     static void
12766 make_connection()
12767 {
12768     if (X_DISPLAY == NULL
12769 # ifdef FEAT_GUI
12770 	    && !gui.in_use
12771 # endif
12772 	    )
12773     {
12774 	x_force_connect = TRUE;
12775 	setup_term_clip();
12776 	x_force_connect = FALSE;
12777     }
12778 }
12779 
12780     static int
12781 check_connection()
12782 {
12783     make_connection();
12784     if (X_DISPLAY == NULL)
12785     {
12786 	EMSG(_("E240: No connection to Vim server"));
12787 	return FAIL;
12788     }
12789     return OK;
12790 }
12791 #endif
12792 
12793 #ifdef FEAT_CLIENTSERVER
12794 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12795 
12796     static void
12797 remote_common(argvars, rettv, expr)
12798     typval_T	*argvars;
12799     typval_T	*rettv;
12800     int		expr;
12801 {
12802     char_u	*server_name;
12803     char_u	*keys;
12804     char_u	*r = NULL;
12805     char_u	buf[NUMBUFLEN];
12806 # ifdef WIN32
12807     HWND	w;
12808 # else
12809     Window	w;
12810 # endif
12811 
12812     if (check_restricted() || check_secure())
12813 	return;
12814 
12815 # ifdef FEAT_X11
12816     if (check_connection() == FAIL)
12817 	return;
12818 # endif
12819 
12820     server_name = get_tv_string_chk(&argvars[0]);
12821     if (server_name == NULL)
12822 	return;		/* type error; errmsg already given */
12823     keys = get_tv_string_buf(&argvars[1], buf);
12824 # ifdef WIN32
12825     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12826 # else
12827     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12828 									  < 0)
12829 # endif
12830     {
12831 	if (r != NULL)
12832 	    EMSG(r);		/* sending worked but evaluation failed */
12833 	else
12834 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12835 	return;
12836     }
12837 
12838     rettv->vval.v_string = r;
12839 
12840     if (argvars[2].v_type != VAR_UNKNOWN)
12841     {
12842 	dictitem_T	v;
12843 	char_u		str[30];
12844 	char_u		*idvar;
12845 
12846 	sprintf((char *)str, "0x%x", (unsigned int)w);
12847 	v.di_tv.v_type = VAR_STRING;
12848 	v.di_tv.vval.v_string = vim_strsave(str);
12849 	idvar = get_tv_string_chk(&argvars[2]);
12850 	if (idvar != NULL)
12851 	    set_var(idvar, &v.di_tv, FALSE);
12852 	vim_free(v.di_tv.vval.v_string);
12853     }
12854 }
12855 #endif
12856 
12857 /*
12858  * "remote_expr()" function
12859  */
12860 /*ARGSUSED*/
12861     static void
12862 f_remote_expr(argvars, rettv)
12863     typval_T	*argvars;
12864     typval_T	*rettv;
12865 {
12866     rettv->v_type = VAR_STRING;
12867     rettv->vval.v_string = NULL;
12868 #ifdef FEAT_CLIENTSERVER
12869     remote_common(argvars, rettv, TRUE);
12870 #endif
12871 }
12872 
12873 /*
12874  * "remote_foreground()" function
12875  */
12876 /*ARGSUSED*/
12877     static void
12878 f_remote_foreground(argvars, rettv)
12879     typval_T	*argvars;
12880     typval_T	*rettv;
12881 {
12882     rettv->vval.v_number = 0;
12883 #ifdef FEAT_CLIENTSERVER
12884 # ifdef WIN32
12885     /* On Win32 it's done in this application. */
12886     {
12887 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12888 
12889 	if (server_name != NULL)
12890 	    serverForeground(server_name);
12891     }
12892 # else
12893     /* Send a foreground() expression to the server. */
12894     argvars[1].v_type = VAR_STRING;
12895     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12896     argvars[2].v_type = VAR_UNKNOWN;
12897     remote_common(argvars, rettv, TRUE);
12898     vim_free(argvars[1].vval.v_string);
12899 # endif
12900 #endif
12901 }
12902 
12903 /*ARGSUSED*/
12904     static void
12905 f_remote_peek(argvars, rettv)
12906     typval_T	*argvars;
12907     typval_T	*rettv;
12908 {
12909 #ifdef FEAT_CLIENTSERVER
12910     dictitem_T	v;
12911     char_u	*s = NULL;
12912 # ifdef WIN32
12913     int		n = 0;
12914 # endif
12915     char_u	*serverid;
12916 
12917     if (check_restricted() || check_secure())
12918     {
12919 	rettv->vval.v_number = -1;
12920 	return;
12921     }
12922     serverid = get_tv_string_chk(&argvars[0]);
12923     if (serverid == NULL)
12924     {
12925 	rettv->vval.v_number = -1;
12926 	return;		/* type error; errmsg already given */
12927     }
12928 # ifdef WIN32
12929     sscanf(serverid, "%x", &n);
12930     if (n == 0)
12931 	rettv->vval.v_number = -1;
12932     else
12933     {
12934 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12935 	rettv->vval.v_number = (s != NULL);
12936     }
12937 # else
12938     rettv->vval.v_number = 0;
12939     if (check_connection() == FAIL)
12940 	return;
12941 
12942     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12943 						serverStrToWin(serverid), &s);
12944 # endif
12945 
12946     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12947     {
12948 	char_u		*retvar;
12949 
12950 	v.di_tv.v_type = VAR_STRING;
12951 	v.di_tv.vval.v_string = vim_strsave(s);
12952 	retvar = get_tv_string_chk(&argvars[1]);
12953 	if (retvar != NULL)
12954 	    set_var(retvar, &v.di_tv, FALSE);
12955 	vim_free(v.di_tv.vval.v_string);
12956     }
12957 #else
12958     rettv->vval.v_number = -1;
12959 #endif
12960 }
12961 
12962 /*ARGSUSED*/
12963     static void
12964 f_remote_read(argvars, rettv)
12965     typval_T	*argvars;
12966     typval_T	*rettv;
12967 {
12968     char_u	*r = NULL;
12969 
12970 #ifdef FEAT_CLIENTSERVER
12971     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12972 
12973     if (serverid != NULL && !check_restricted() && !check_secure())
12974     {
12975 # ifdef WIN32
12976 	/* The server's HWND is encoded in the 'id' parameter */
12977 	int		n = 0;
12978 
12979 	sscanf(serverid, "%x", &n);
12980 	if (n != 0)
12981 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12982 	if (r == NULL)
12983 # else
12984 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12985 		serverStrToWin(serverid), &r, FALSE) < 0)
12986 # endif
12987 	    EMSG(_("E277: Unable to read a server reply"));
12988     }
12989 #endif
12990     rettv->v_type = VAR_STRING;
12991     rettv->vval.v_string = r;
12992 }
12993 
12994 /*
12995  * "remote_send()" function
12996  */
12997 /*ARGSUSED*/
12998     static void
12999 f_remote_send(argvars, rettv)
13000     typval_T	*argvars;
13001     typval_T	*rettv;
13002 {
13003     rettv->v_type = VAR_STRING;
13004     rettv->vval.v_string = NULL;
13005 #ifdef FEAT_CLIENTSERVER
13006     remote_common(argvars, rettv, FALSE);
13007 #endif
13008 }
13009 
13010 /*
13011  * "remove()" function
13012  */
13013     static void
13014 f_remove(argvars, rettv)
13015     typval_T	*argvars;
13016     typval_T	*rettv;
13017 {
13018     list_T	*l;
13019     listitem_T	*item, *item2;
13020     listitem_T	*li;
13021     long	idx;
13022     long	end;
13023     char_u	*key;
13024     dict_T	*d;
13025     dictitem_T	*di;
13026 
13027     rettv->vval.v_number = 0;
13028     if (argvars[0].v_type == VAR_DICT)
13029     {
13030 	if (argvars[2].v_type != VAR_UNKNOWN)
13031 	    EMSG2(_(e_toomanyarg), "remove()");
13032 	else if ((d = argvars[0].vval.v_dict) != NULL
13033 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
13034 	{
13035 	    key = get_tv_string_chk(&argvars[1]);
13036 	    if (key != NULL)
13037 	    {
13038 		di = dict_find(d, key, -1);
13039 		if (di == NULL)
13040 		    EMSG2(_(e_dictkey), key);
13041 		else
13042 		{
13043 		    *rettv = di->di_tv;
13044 		    init_tv(&di->di_tv);
13045 		    dictitem_remove(d, di);
13046 		}
13047 	    }
13048 	}
13049     }
13050     else if (argvars[0].v_type != VAR_LIST)
13051 	EMSG2(_(e_listdictarg), "remove()");
13052     else if ((l = argvars[0].vval.v_list) != NULL
13053 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
13054     {
13055 	int	    error = FALSE;
13056 
13057 	idx = get_tv_number_chk(&argvars[1], &error);
13058 	if (error)
13059 	    ;		/* type error: do nothing, errmsg already given */
13060 	else if ((item = list_find(l, idx)) == NULL)
13061 	    EMSGN(_(e_listidx), idx);
13062 	else
13063 	{
13064 	    if (argvars[2].v_type == VAR_UNKNOWN)
13065 	    {
13066 		/* Remove one item, return its value. */
13067 		list_remove(l, item, item);
13068 		*rettv = item->li_tv;
13069 		vim_free(item);
13070 	    }
13071 	    else
13072 	    {
13073 		/* Remove range of items, return list with values. */
13074 		end = get_tv_number_chk(&argvars[2], &error);
13075 		if (error)
13076 		    ;		/* type error: do nothing */
13077 		else if ((item2 = list_find(l, end)) == NULL)
13078 		    EMSGN(_(e_listidx), end);
13079 		else
13080 		{
13081 		    int	    cnt = 0;
13082 
13083 		    for (li = item; li != NULL; li = li->li_next)
13084 		    {
13085 			++cnt;
13086 			if (li == item2)
13087 			    break;
13088 		    }
13089 		    if (li == NULL)  /* didn't find "item2" after "item" */
13090 			EMSG(_(e_invrange));
13091 		    else
13092 		    {
13093 			list_remove(l, item, item2);
13094 			if (rettv_list_alloc(rettv) == OK)
13095 			{
13096 			    l = rettv->vval.v_list;
13097 			    l->lv_first = item;
13098 			    l->lv_last = item2;
13099 			    item->li_prev = NULL;
13100 			    item2->li_next = NULL;
13101 			    l->lv_len = cnt;
13102 			}
13103 		    }
13104 		}
13105 	    }
13106 	}
13107     }
13108 }
13109 
13110 /*
13111  * "rename({from}, {to})" function
13112  */
13113     static void
13114 f_rename(argvars, rettv)
13115     typval_T	*argvars;
13116     typval_T	*rettv;
13117 {
13118     char_u	buf[NUMBUFLEN];
13119 
13120     if (check_restricted() || check_secure())
13121 	rettv->vval.v_number = -1;
13122     else
13123 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
13124 				      get_tv_string_buf(&argvars[1], buf));
13125 }
13126 
13127 /*
13128  * "repeat()" function
13129  */
13130 /*ARGSUSED*/
13131     static void
13132 f_repeat(argvars, rettv)
13133     typval_T	*argvars;
13134     typval_T	*rettv;
13135 {
13136     char_u	*p;
13137     int		n;
13138     int		slen;
13139     int		len;
13140     char_u	*r;
13141     int		i;
13142 
13143     n = get_tv_number(&argvars[1]);
13144     if (argvars[0].v_type == VAR_LIST)
13145     {
13146 	if (rettv_list_alloc(rettv) == OK && argvars[0].vval.v_list != NULL)
13147 	    while (n-- > 0)
13148 		if (list_extend(rettv->vval.v_list,
13149 					argvars[0].vval.v_list, NULL) == FAIL)
13150 		    break;
13151     }
13152     else
13153     {
13154 	p = get_tv_string(&argvars[0]);
13155 	rettv->v_type = VAR_STRING;
13156 	rettv->vval.v_string = NULL;
13157 
13158 	slen = (int)STRLEN(p);
13159 	len = slen * n;
13160 	if (len <= 0)
13161 	    return;
13162 
13163 	r = alloc(len + 1);
13164 	if (r != NULL)
13165 	{
13166 	    for (i = 0; i < n; i++)
13167 		mch_memmove(r + i * slen, p, (size_t)slen);
13168 	    r[len] = NUL;
13169 	}
13170 
13171 	rettv->vval.v_string = r;
13172     }
13173 }
13174 
13175 /*
13176  * "resolve()" function
13177  */
13178     static void
13179 f_resolve(argvars, rettv)
13180     typval_T	*argvars;
13181     typval_T	*rettv;
13182 {
13183     char_u	*p;
13184 
13185     p = get_tv_string(&argvars[0]);
13186 #ifdef FEAT_SHORTCUT
13187     {
13188 	char_u	*v = NULL;
13189 
13190 	v = mch_resolve_shortcut(p);
13191 	if (v != NULL)
13192 	    rettv->vval.v_string = v;
13193 	else
13194 	    rettv->vval.v_string = vim_strsave(p);
13195     }
13196 #else
13197 # ifdef HAVE_READLINK
13198     {
13199 	char_u	buf[MAXPATHL + 1];
13200 	char_u	*cpy;
13201 	int	len;
13202 	char_u	*remain = NULL;
13203 	char_u	*q;
13204 	int	is_relative_to_current = FALSE;
13205 	int	has_trailing_pathsep = FALSE;
13206 	int	limit = 100;
13207 
13208 	p = vim_strsave(p);
13209 
13210 	if (p[0] == '.' && (vim_ispathsep(p[1])
13211 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
13212 	    is_relative_to_current = TRUE;
13213 
13214 	len = STRLEN(p);
13215 	if (len > 0 && after_pathsep(p, p + len))
13216 	    has_trailing_pathsep = TRUE;
13217 
13218 	q = getnextcomp(p);
13219 	if (*q != NUL)
13220 	{
13221 	    /* Separate the first path component in "p", and keep the
13222 	     * remainder (beginning with the path separator). */
13223 	    remain = vim_strsave(q - 1);
13224 	    q[-1] = NUL;
13225 	}
13226 
13227 	for (;;)
13228 	{
13229 	    for (;;)
13230 	    {
13231 		len = readlink((char *)p, (char *)buf, MAXPATHL);
13232 		if (len <= 0)
13233 		    break;
13234 		buf[len] = NUL;
13235 
13236 		if (limit-- == 0)
13237 		{
13238 		    vim_free(p);
13239 		    vim_free(remain);
13240 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
13241 		    rettv->vval.v_string = NULL;
13242 		    goto fail;
13243 		}
13244 
13245 		/* Ensure that the result will have a trailing path separator
13246 		 * if the argument has one. */
13247 		if (remain == NULL && has_trailing_pathsep)
13248 		    add_pathsep(buf);
13249 
13250 		/* Separate the first path component in the link value and
13251 		 * concatenate the remainders. */
13252 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
13253 		if (*q != NUL)
13254 		{
13255 		    if (remain == NULL)
13256 			remain = vim_strsave(q - 1);
13257 		    else
13258 		    {
13259 			cpy = concat_str(q - 1, remain);
13260 			if (cpy != NULL)
13261 			{
13262 			    vim_free(remain);
13263 			    remain = cpy;
13264 			}
13265 		    }
13266 		    q[-1] = NUL;
13267 		}
13268 
13269 		q = gettail(p);
13270 		if (q > p && *q == NUL)
13271 		{
13272 		    /* Ignore trailing path separator. */
13273 		    q[-1] = NUL;
13274 		    q = gettail(p);
13275 		}
13276 		if (q > p && !mch_isFullName(buf))
13277 		{
13278 		    /* symlink is relative to directory of argument */
13279 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
13280 		    if (cpy != NULL)
13281 		    {
13282 			STRCPY(cpy, p);
13283 			STRCPY(gettail(cpy), buf);
13284 			vim_free(p);
13285 			p = cpy;
13286 		    }
13287 		}
13288 		else
13289 		{
13290 		    vim_free(p);
13291 		    p = vim_strsave(buf);
13292 		}
13293 	    }
13294 
13295 	    if (remain == NULL)
13296 		break;
13297 
13298 	    /* Append the first path component of "remain" to "p". */
13299 	    q = getnextcomp(remain + 1);
13300 	    len = q - remain - (*q != NUL);
13301 	    cpy = vim_strnsave(p, STRLEN(p) + len);
13302 	    if (cpy != NULL)
13303 	    {
13304 		STRNCAT(cpy, remain, len);
13305 		vim_free(p);
13306 		p = cpy;
13307 	    }
13308 	    /* Shorten "remain". */
13309 	    if (*q != NUL)
13310 		STRCPY(remain, q - 1);
13311 	    else
13312 	    {
13313 		vim_free(remain);
13314 		remain = NULL;
13315 	    }
13316 	}
13317 
13318 	/* If the result is a relative path name, make it explicitly relative to
13319 	 * the current directory if and only if the argument had this form. */
13320 	if (!vim_ispathsep(*p))
13321 	{
13322 	    if (is_relative_to_current
13323 		    && *p != NUL
13324 		    && !(p[0] == '.'
13325 			&& (p[1] == NUL
13326 			    || vim_ispathsep(p[1])
13327 			    || (p[1] == '.'
13328 				&& (p[2] == NUL
13329 				    || vim_ispathsep(p[2]))))))
13330 	    {
13331 		/* Prepend "./". */
13332 		cpy = concat_str((char_u *)"./", p);
13333 		if (cpy != NULL)
13334 		{
13335 		    vim_free(p);
13336 		    p = cpy;
13337 		}
13338 	    }
13339 	    else if (!is_relative_to_current)
13340 	    {
13341 		/* Strip leading "./". */
13342 		q = p;
13343 		while (q[0] == '.' && vim_ispathsep(q[1]))
13344 		    q += 2;
13345 		if (q > p)
13346 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
13347 	    }
13348 	}
13349 
13350 	/* Ensure that the result will have no trailing path separator
13351 	 * if the argument had none.  But keep "/" or "//". */
13352 	if (!has_trailing_pathsep)
13353 	{
13354 	    q = p + STRLEN(p);
13355 	    if (after_pathsep(p, q))
13356 		*gettail_sep(p) = NUL;
13357 	}
13358 
13359 	rettv->vval.v_string = p;
13360     }
13361 # else
13362     rettv->vval.v_string = vim_strsave(p);
13363 # endif
13364 #endif
13365 
13366     simplify_filename(rettv->vval.v_string);
13367 
13368 #ifdef HAVE_READLINK
13369 fail:
13370 #endif
13371     rettv->v_type = VAR_STRING;
13372 }
13373 
13374 /*
13375  * "reverse({list})" function
13376  */
13377     static void
13378 f_reverse(argvars, rettv)
13379     typval_T	*argvars;
13380     typval_T	*rettv;
13381 {
13382     list_T	*l;
13383     listitem_T	*li, *ni;
13384 
13385     rettv->vval.v_number = 0;
13386     if (argvars[0].v_type != VAR_LIST)
13387 	EMSG2(_(e_listarg), "reverse()");
13388     else if ((l = argvars[0].vval.v_list) != NULL
13389 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
13390     {
13391 	li = l->lv_last;
13392 	l->lv_first = l->lv_last = NULL;
13393 	l->lv_len = 0;
13394 	while (li != NULL)
13395 	{
13396 	    ni = li->li_prev;
13397 	    list_append(l, li);
13398 	    li = ni;
13399 	}
13400 	rettv->vval.v_list = l;
13401 	rettv->v_type = VAR_LIST;
13402 	++l->lv_refcount;
13403     }
13404 }
13405 
13406 #define SP_NOMOVE	0x01	    /* don't move cursor */
13407 #define SP_REPEAT	0x02	    /* repeat to find outer pair */
13408 #define SP_RETCOUNT	0x04	    /* return matchcount */
13409 #define SP_SETPCMARK	0x08	    /* set previous context mark */
13410 #define SP_START	0x10	    /* accept match at start position */
13411 #define SP_SUBPAT	0x20	    /* return nr of matching sub-pattern */
13412 #define SP_END		0x40	    /* leave cursor at end of match */
13413 
13414 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
13415 
13416 /*
13417  * Get flags for a search function.
13418  * Possibly sets "p_ws".
13419  * Returns BACKWARD, FORWARD or zero (for an error).
13420  */
13421     static int
13422 get_search_arg(varp, flagsp)
13423     typval_T	*varp;
13424     int		*flagsp;
13425 {
13426     int		dir = FORWARD;
13427     char_u	*flags;
13428     char_u	nbuf[NUMBUFLEN];
13429     int		mask;
13430 
13431     if (varp->v_type != VAR_UNKNOWN)
13432     {
13433 	flags = get_tv_string_buf_chk(varp, nbuf);
13434 	if (flags == NULL)
13435 	    return 0;		/* type error; errmsg already given */
13436 	while (*flags != NUL)
13437 	{
13438 	    switch (*flags)
13439 	    {
13440 		case 'b': dir = BACKWARD; break;
13441 		case 'w': p_ws = TRUE; break;
13442 		case 'W': p_ws = FALSE; break;
13443 		default:  mask = 0;
13444 			  if (flagsp != NULL)
13445 			     switch (*flags)
13446 			     {
13447 				 case 'c': mask = SP_START; break;
13448 				 case 'e': mask = SP_END; break;
13449 				 case 'm': mask = SP_RETCOUNT; break;
13450 				 case 'n': mask = SP_NOMOVE; break;
13451 				 case 'p': mask = SP_SUBPAT; break;
13452 				 case 'r': mask = SP_REPEAT; break;
13453 				 case 's': mask = SP_SETPCMARK; break;
13454 			     }
13455 			  if (mask == 0)
13456 			  {
13457 			      EMSG2(_(e_invarg2), flags);
13458 			      dir = 0;
13459 			  }
13460 			  else
13461 			      *flagsp |= mask;
13462 	    }
13463 	    if (dir == 0)
13464 		break;
13465 	    ++flags;
13466 	}
13467     }
13468     return dir;
13469 }
13470 
13471 /*
13472  * Shared by search() and searchpos() functions
13473  */
13474     static int
13475 search_cmn(argvars, match_pos, flagsp)
13476     typval_T	*argvars;
13477     pos_T	*match_pos;
13478     int		*flagsp;
13479 {
13480     int		flags;
13481     char_u	*pat;
13482     pos_T	pos;
13483     pos_T	save_cursor;
13484     int		save_p_ws = p_ws;
13485     int		dir;
13486     int		retval = 0;	/* default: FAIL */
13487     long	lnum_stop = 0;
13488     int		options = SEARCH_KEEP;
13489     int		subpatnum;
13490 
13491     pat = get_tv_string(&argvars[0]);
13492     dir = get_search_arg(&argvars[1], flagsp);	/* may set p_ws */
13493     if (dir == 0)
13494 	goto theend;
13495     flags = *flagsp;
13496     if (flags & SP_START)
13497 	options |= SEARCH_START;
13498     if (flags & SP_END)
13499 	options |= SEARCH_END;
13500 
13501     /* Optional extra argument: line number to stop searching. */
13502     if (argvars[1].v_type != VAR_UNKNOWN
13503 	    && argvars[2].v_type != VAR_UNKNOWN)
13504     {
13505 	lnum_stop = get_tv_number_chk(&argvars[2], NULL);
13506 	if (lnum_stop < 0)
13507 	    goto theend;
13508     }
13509 
13510     /*
13511      * This function does not accept SP_REPEAT and SP_RETCOUNT flags.
13512      * Check to make sure only those flags are set.
13513      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
13514      * flags cannot be set. Check for that condition also.
13515      */
13516     if (((flags & (SP_REPEAT | SP_RETCOUNT)) != 0)
13517 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13518     {
13519 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13520 	goto theend;
13521     }
13522 
13523     pos = save_cursor = curwin->w_cursor;
13524     subpatnum = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13525 				     options, RE_SEARCH, (linenr_T)lnum_stop);
13526     if (subpatnum != FAIL)
13527     {
13528 	if (flags & SP_SUBPAT)
13529 	    retval = subpatnum;
13530 	else
13531 	    retval = pos.lnum;
13532 	if (flags & SP_SETPCMARK)
13533 	    setpcmark();
13534 	curwin->w_cursor = pos;
13535 	if (match_pos != NULL)
13536 	{
13537 	    /* Store the match cursor position */
13538 	    match_pos->lnum = pos.lnum;
13539 	    match_pos->col = pos.col + 1;
13540 	}
13541 	/* "/$" will put the cursor after the end of the line, may need to
13542 	 * correct that here */
13543 	check_cursor();
13544     }
13545 
13546     /* If 'n' flag is used: restore cursor position. */
13547     if (flags & SP_NOMOVE)
13548 	curwin->w_cursor = save_cursor;
13549 theend:
13550     p_ws = save_p_ws;
13551 
13552     return retval;
13553 }
13554 
13555 /*
13556  * "search()" function
13557  */
13558     static void
13559 f_search(argvars, rettv)
13560     typval_T	*argvars;
13561     typval_T	*rettv;
13562 {
13563     int		flags = 0;
13564 
13565     rettv->vval.v_number = search_cmn(argvars, NULL, &flags);
13566 }
13567 
13568 /*
13569  * "searchdecl()" function
13570  */
13571     static void
13572 f_searchdecl(argvars, rettv)
13573     typval_T	*argvars;
13574     typval_T	*rettv;
13575 {
13576     int		locally = 1;
13577     int		thisblock = 0;
13578     int		error = FALSE;
13579     char_u	*name;
13580 
13581     rettv->vval.v_number = 1;	/* default: FAIL */
13582 
13583     name = get_tv_string_chk(&argvars[0]);
13584     if (argvars[1].v_type != VAR_UNKNOWN)
13585     {
13586 	locally = get_tv_number_chk(&argvars[1], &error) == 0;
13587 	if (!error && argvars[2].v_type != VAR_UNKNOWN)
13588 	    thisblock = get_tv_number_chk(&argvars[2], &error) != 0;
13589     }
13590     if (!error && name != NULL)
13591 	rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
13592 				     locally, thisblock, SEARCH_KEEP) == FAIL;
13593 }
13594 
13595 /*
13596  * Used by searchpair() and searchpairpos()
13597  */
13598     static int
13599 searchpair_cmn(argvars, match_pos)
13600     typval_T	*argvars;
13601     pos_T	*match_pos;
13602 {
13603     char_u	*spat, *mpat, *epat;
13604     char_u	*skip;
13605     int		save_p_ws = p_ws;
13606     int		dir;
13607     int		flags = 0;
13608     char_u	nbuf1[NUMBUFLEN];
13609     char_u	nbuf2[NUMBUFLEN];
13610     char_u	nbuf3[NUMBUFLEN];
13611     int		retval = 0;		/* default: FAIL */
13612     long	lnum_stop = 0;
13613 
13614     /* Get the three pattern arguments: start, middle, end. */
13615     spat = get_tv_string_chk(&argvars[0]);
13616     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
13617     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
13618     if (spat == NULL || mpat == NULL || epat == NULL)
13619 	goto theend;	    /* type error */
13620 
13621     /* Handle the optional fourth argument: flags */
13622     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13623     if (dir == 0)
13624 	goto theend;
13625 
13626     /* Don't accept SP_END or SP_SUBPAT.
13627      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13628      */
13629     if ((flags & (SP_END | SP_SUBPAT)) != 0
13630 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13631     {
13632 	EMSG2(_(e_invarg2), get_tv_string(&argvars[3]));
13633 	goto theend;
13634     }
13635 
13636     /* Optional fifth argument: skip expression */
13637     if (argvars[3].v_type == VAR_UNKNOWN
13638 	    || argvars[4].v_type == VAR_UNKNOWN)
13639 	skip = (char_u *)"";
13640     else
13641     {
13642 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13643 	if (argvars[5].v_type != VAR_UNKNOWN)
13644 	{
13645 	    lnum_stop = get_tv_number_chk(&argvars[5], NULL);
13646 	    if (lnum_stop < 0)
13647 		goto theend;
13648 	}
13649     }
13650     if (skip == NULL)
13651 	goto theend;	    /* type error */
13652 
13653     retval = do_searchpair(spat, mpat, epat, dir, skip, flags,
13654 							match_pos, lnum_stop);
13655 
13656 theend:
13657     p_ws = save_p_ws;
13658 
13659     return retval;
13660 }
13661 
13662 /*
13663  * "searchpair()" function
13664  */
13665     static void
13666 f_searchpair(argvars, rettv)
13667     typval_T	*argvars;
13668     typval_T	*rettv;
13669 {
13670     rettv->vval.v_number = searchpair_cmn(argvars, NULL);
13671 }
13672 
13673 /*
13674  * "searchpairpos()" function
13675  */
13676     static void
13677 f_searchpairpos(argvars, rettv)
13678     typval_T	*argvars;
13679     typval_T	*rettv;
13680 {
13681     pos_T	match_pos;
13682     int		lnum = 0;
13683     int		col = 0;
13684 
13685     rettv->vval.v_number = 0;
13686 
13687     if (rettv_list_alloc(rettv) == FAIL)
13688 	return;
13689 
13690     if (searchpair_cmn(argvars, &match_pos) > 0)
13691     {
13692 	lnum = match_pos.lnum;
13693 	col = match_pos.col;
13694     }
13695 
13696     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
13697     list_append_number(rettv->vval.v_list, (varnumber_T)col);
13698 }
13699 
13700 /*
13701  * Search for a start/middle/end thing.
13702  * Used by searchpair(), see its documentation for the details.
13703  * Returns 0 or -1 for no match,
13704  */
13705     long
13706 do_searchpair(spat, mpat, epat, dir, skip, flags, match_pos, lnum_stop)
13707     char_u	*spat;	    /* start pattern */
13708     char_u	*mpat;	    /* middle pattern */
13709     char_u	*epat;	    /* end pattern */
13710     int		dir;	    /* BACKWARD or FORWARD */
13711     char_u	*skip;	    /* skip expression */
13712     int		flags;	    /* SP_SETPCMARK and other SP_ values */
13713     pos_T	*match_pos;
13714     linenr_T	lnum_stop;  /* stop at this line if not zero */
13715 {
13716     char_u	*save_cpo;
13717     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13718     long	retval = 0;
13719     pos_T	pos;
13720     pos_T	firstpos;
13721     pos_T	foundpos;
13722     pos_T	save_cursor;
13723     pos_T	save_pos;
13724     int		n;
13725     int		r;
13726     int		nest = 1;
13727     int		err;
13728     int		options = SEARCH_KEEP;
13729 
13730     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13731     save_cpo = p_cpo;
13732     p_cpo = (char_u *)"";
13733 
13734     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13735      * start/middle/end (pat3, for the top pair). */
13736     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13737     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13738     if (pat2 == NULL || pat3 == NULL)
13739 	goto theend;
13740     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13741     if (*mpat == NUL)
13742 	STRCPY(pat3, pat2);
13743     else
13744 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13745 							    spat, epat, mpat);
13746     if (flags & SP_START)
13747 	options |= SEARCH_START;
13748 
13749     save_cursor = curwin->w_cursor;
13750     pos = curwin->w_cursor;
13751     clearpos(&firstpos);
13752     clearpos(&foundpos);
13753     pat = pat3;
13754     for (;;)
13755     {
13756 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13757 					       options, RE_SEARCH, lnum_stop);
13758 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13759 	    /* didn't find it or found the first match again: FAIL */
13760 	    break;
13761 
13762 	if (firstpos.lnum == 0)
13763 	    firstpos = pos;
13764 	if (equalpos(pos, foundpos))
13765 	{
13766 	    /* Found the same position again.  Can happen with a pattern that
13767 	     * has "\zs" at the end and searching backwards.  Advance one
13768 	     * character and try again. */
13769 	    if (dir == BACKWARD)
13770 		decl(&pos);
13771 	    else
13772 		incl(&pos);
13773 	}
13774 	foundpos = pos;
13775 
13776 	/* If the skip pattern matches, ignore this match. */
13777 	if (*skip != NUL)
13778 	{
13779 	    save_pos = curwin->w_cursor;
13780 	    curwin->w_cursor = pos;
13781 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13782 	    curwin->w_cursor = save_pos;
13783 	    if (err)
13784 	    {
13785 		/* Evaluating {skip} caused an error, break here. */
13786 		curwin->w_cursor = save_cursor;
13787 		retval = -1;
13788 		break;
13789 	    }
13790 	    if (r)
13791 		continue;
13792 	}
13793 
13794 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13795 	{
13796 	    /* Found end when searching backwards or start when searching
13797 	     * forward: nested pair. */
13798 	    ++nest;
13799 	    pat = pat2;		/* nested, don't search for middle */
13800 	}
13801 	else
13802 	{
13803 	    /* Found end when searching forward or start when searching
13804 	     * backward: end of (nested) pair; or found middle in outer pair. */
13805 	    if (--nest == 1)
13806 		pat = pat3;	/* outer level, search for middle */
13807 	}
13808 
13809 	if (nest == 0)
13810 	{
13811 	    /* Found the match: return matchcount or line number. */
13812 	    if (flags & SP_RETCOUNT)
13813 		++retval;
13814 	    else
13815 		retval = pos.lnum;
13816 	    if (flags & SP_SETPCMARK)
13817 		setpcmark();
13818 	    curwin->w_cursor = pos;
13819 	    if (!(flags & SP_REPEAT))
13820 		break;
13821 	    nest = 1;	    /* search for next unmatched */
13822 	}
13823     }
13824 
13825     if (match_pos != NULL)
13826     {
13827 	/* Store the match cursor position */
13828 	match_pos->lnum = curwin->w_cursor.lnum;
13829 	match_pos->col = curwin->w_cursor.col + 1;
13830     }
13831 
13832     /* If 'n' flag is used or search failed: restore cursor position. */
13833     if ((flags & SP_NOMOVE) || retval == 0)
13834 	curwin->w_cursor = save_cursor;
13835 
13836 theend:
13837     vim_free(pat2);
13838     vim_free(pat3);
13839     p_cpo = save_cpo;
13840 
13841     return retval;
13842 }
13843 
13844 /*
13845  * "searchpos()" function
13846  */
13847     static void
13848 f_searchpos(argvars, rettv)
13849     typval_T	*argvars;
13850     typval_T	*rettv;
13851 {
13852     pos_T	match_pos;
13853     int		lnum = 0;
13854     int		col = 0;
13855     int		n;
13856     int		flags = 0;
13857 
13858     rettv->vval.v_number = 0;
13859 
13860     if (rettv_list_alloc(rettv) == FAIL)
13861 	return;
13862 
13863     n = search_cmn(argvars, &match_pos, &flags);
13864     if (n > 0)
13865     {
13866 	lnum = match_pos.lnum;
13867 	col = match_pos.col;
13868     }
13869 
13870     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
13871     list_append_number(rettv->vval.v_list, (varnumber_T)col);
13872     if (flags & SP_SUBPAT)
13873 	list_append_number(rettv->vval.v_list, (varnumber_T)n);
13874 }
13875 
13876 
13877 /*ARGSUSED*/
13878     static void
13879 f_server2client(argvars, rettv)
13880     typval_T	*argvars;
13881     typval_T	*rettv;
13882 {
13883 #ifdef FEAT_CLIENTSERVER
13884     char_u	buf[NUMBUFLEN];
13885     char_u	*server = get_tv_string_chk(&argvars[0]);
13886     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13887 
13888     rettv->vval.v_number = -1;
13889     if (server == NULL || reply == NULL)
13890 	return;
13891     if (check_restricted() || check_secure())
13892 	return;
13893 # ifdef FEAT_X11
13894     if (check_connection() == FAIL)
13895 	return;
13896 # endif
13897 
13898     if (serverSendReply(server, reply) < 0)
13899     {
13900 	EMSG(_("E258: Unable to send to client"));
13901 	return;
13902     }
13903     rettv->vval.v_number = 0;
13904 #else
13905     rettv->vval.v_number = -1;
13906 #endif
13907 }
13908 
13909 /*ARGSUSED*/
13910     static void
13911 f_serverlist(argvars, rettv)
13912     typval_T	*argvars;
13913     typval_T	*rettv;
13914 {
13915     char_u	*r = NULL;
13916 
13917 #ifdef FEAT_CLIENTSERVER
13918 # ifdef WIN32
13919     r = serverGetVimNames();
13920 # else
13921     make_connection();
13922     if (X_DISPLAY != NULL)
13923 	r = serverGetVimNames(X_DISPLAY);
13924 # endif
13925 #endif
13926     rettv->v_type = VAR_STRING;
13927     rettv->vval.v_string = r;
13928 }
13929 
13930 /*
13931  * "setbufvar()" function
13932  */
13933 /*ARGSUSED*/
13934     static void
13935 f_setbufvar(argvars, rettv)
13936     typval_T	*argvars;
13937     typval_T	*rettv;
13938 {
13939     buf_T	*buf;
13940 #ifdef FEAT_AUTOCMD
13941     aco_save_T	aco;
13942 #else
13943     buf_T	*save_curbuf;
13944 #endif
13945     char_u	*varname, *bufvarname;
13946     typval_T	*varp;
13947     char_u	nbuf[NUMBUFLEN];
13948 
13949     rettv->vval.v_number = 0;
13950 
13951     if (check_restricted() || check_secure())
13952 	return;
13953     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13954     varname = get_tv_string_chk(&argvars[1]);
13955     buf = get_buf_tv(&argvars[0]);
13956     varp = &argvars[2];
13957 
13958     if (buf != NULL && varname != NULL && varp != NULL)
13959     {
13960 	/* set curbuf to be our buf, temporarily */
13961 #ifdef FEAT_AUTOCMD
13962 	aucmd_prepbuf(&aco, buf);
13963 #else
13964 	save_curbuf = curbuf;
13965 	curbuf = buf;
13966 #endif
13967 
13968 	if (*varname == '&')
13969 	{
13970 	    long	numval;
13971 	    char_u	*strval;
13972 	    int		error = FALSE;
13973 
13974 	    ++varname;
13975 	    numval = get_tv_number_chk(varp, &error);
13976 	    strval = get_tv_string_buf_chk(varp, nbuf);
13977 	    if (!error && strval != NULL)
13978 		set_option_value(varname, numval, strval, OPT_LOCAL);
13979 	}
13980 	else
13981 	{
13982 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13983 	    if (bufvarname != NULL)
13984 	    {
13985 		STRCPY(bufvarname, "b:");
13986 		STRCPY(bufvarname + 2, varname);
13987 		set_var(bufvarname, varp, TRUE);
13988 		vim_free(bufvarname);
13989 	    }
13990 	}
13991 
13992 	/* reset notion of buffer */
13993 #ifdef FEAT_AUTOCMD
13994 	aucmd_restbuf(&aco);
13995 #else
13996 	curbuf = save_curbuf;
13997 #endif
13998     }
13999 }
14000 
14001 /*
14002  * "setcmdpos()" function
14003  */
14004     static void
14005 f_setcmdpos(argvars, rettv)
14006     typval_T	*argvars;
14007     typval_T	*rettv;
14008 {
14009     int		pos = (int)get_tv_number(&argvars[0]) - 1;
14010 
14011     if (pos >= 0)
14012 	rettv->vval.v_number = set_cmdline_pos(pos);
14013 }
14014 
14015 /*
14016  * "setline()" function
14017  */
14018     static void
14019 f_setline(argvars, rettv)
14020     typval_T	*argvars;
14021     typval_T	*rettv;
14022 {
14023     linenr_T	lnum;
14024     char_u	*line = NULL;
14025     list_T	*l = NULL;
14026     listitem_T	*li = NULL;
14027     long	added = 0;
14028     linenr_T	lcount = curbuf->b_ml.ml_line_count;
14029 
14030     lnum = get_tv_lnum(&argvars[0]);
14031     if (argvars[1].v_type == VAR_LIST)
14032     {
14033 	l = argvars[1].vval.v_list;
14034 	li = l->lv_first;
14035     }
14036     else
14037 	line = get_tv_string_chk(&argvars[1]);
14038 
14039     rettv->vval.v_number = 0;		/* OK */
14040     for (;;)
14041     {
14042 	if (l != NULL)
14043 	{
14044 	    /* list argument, get next string */
14045 	    if (li == NULL)
14046 		break;
14047 	    line = get_tv_string_chk(&li->li_tv);
14048 	    li = li->li_next;
14049 	}
14050 
14051 	rettv->vval.v_number = 1;	/* FAIL */
14052 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
14053 	    break;
14054 	if (lnum <= curbuf->b_ml.ml_line_count)
14055 	{
14056 	    /* existing line, replace it */
14057 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
14058 	    {
14059 		changed_bytes(lnum, 0);
14060 		check_cursor_col();
14061 		rettv->vval.v_number = 0;	/* OK */
14062 	    }
14063 	}
14064 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
14065 	{
14066 	    /* lnum is one past the last line, append the line */
14067 	    ++added;
14068 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
14069 		rettv->vval.v_number = 0;	/* OK */
14070 	}
14071 
14072 	if (l == NULL)			/* only one string argument */
14073 	    break;
14074 	++lnum;
14075     }
14076 
14077     if (added > 0)
14078 	appended_lines_mark(lcount, added);
14079 }
14080 
14081 /*
14082  * Used by "setqflist()" and "setloclist()" functions
14083  */
14084 /*ARGSUSED*/
14085     static void
14086 set_qf_ll_list(wp, list_arg, action_arg, rettv)
14087     win_T	*wp;
14088     typval_T	*list_arg;
14089     typval_T	*action_arg;
14090     typval_T	*rettv;
14091 {
14092 #ifdef FEAT_QUICKFIX
14093     char_u	*act;
14094     int		action = ' ';
14095 #endif
14096 
14097     rettv->vval.v_number = -1;
14098 
14099 #ifdef FEAT_QUICKFIX
14100     if (list_arg->v_type != VAR_LIST)
14101 	EMSG(_(e_listreq));
14102     else
14103     {
14104 	list_T  *l = list_arg->vval.v_list;
14105 
14106 	if (action_arg->v_type == VAR_STRING)
14107 	{
14108 	    act = get_tv_string_chk(action_arg);
14109 	    if (act == NULL)
14110 		return;		/* type error; errmsg already given */
14111 	    if (*act == 'a' || *act == 'r')
14112 		action = *act;
14113 	}
14114 
14115 	if (l != NULL && set_errorlist(wp, l, action) == OK)
14116 	    rettv->vval.v_number = 0;
14117     }
14118 #endif
14119 }
14120 
14121 /*
14122  * "setloclist()" function
14123  */
14124 /*ARGSUSED*/
14125     static void
14126 f_setloclist(argvars, rettv)
14127     typval_T	*argvars;
14128     typval_T	*rettv;
14129 {
14130     win_T	*win;
14131 
14132     rettv->vval.v_number = -1;
14133 
14134     win = find_win_by_nr(&argvars[0]);
14135     if (win != NULL)
14136 	set_qf_ll_list(win, &argvars[1], &argvars[2], rettv);
14137 }
14138 
14139 /*
14140  * "setpos()" function
14141  */
14142 /*ARGSUSED*/
14143     static void
14144 f_setpos(argvars, rettv)
14145     typval_T	*argvars;
14146     typval_T	*rettv;
14147 {
14148     pos_T	pos;
14149     int		fnum;
14150     char_u	*name;
14151 
14152     name = get_tv_string_chk(argvars);
14153     if (name != NULL)
14154     {
14155 	if (list2fpos(&argvars[1], &pos, &fnum) == OK)
14156 	{
14157 	    --pos.col;
14158 	    if (name[0] == '.')		/* cursor */
14159 	    {
14160 		if (fnum == curbuf->b_fnum)
14161 		{
14162 		    curwin->w_cursor = pos;
14163 		    check_cursor();
14164 		}
14165 		else
14166 		    EMSG(_(e_invarg));
14167 	    }
14168 	    else if (name[0] == '\'')	/* mark */
14169 		(void)setmark_pos(name[1], &pos, fnum);
14170 	    else
14171 		EMSG(_(e_invarg));
14172 	}
14173     }
14174 }
14175 
14176 /*
14177  * "setqflist()" function
14178  */
14179 /*ARGSUSED*/
14180     static void
14181 f_setqflist(argvars, rettv)
14182     typval_T	*argvars;
14183     typval_T	*rettv;
14184 {
14185     set_qf_ll_list(NULL, &argvars[0], &argvars[1], rettv);
14186 }
14187 
14188 /*
14189  * "setreg()" function
14190  */
14191     static void
14192 f_setreg(argvars, rettv)
14193     typval_T	*argvars;
14194     typval_T	*rettv;
14195 {
14196     int		regname;
14197     char_u	*strregname;
14198     char_u	*stropt;
14199     char_u	*strval;
14200     int		append;
14201     char_u	yank_type;
14202     long	block_len;
14203 
14204     block_len = -1;
14205     yank_type = MAUTO;
14206     append = FALSE;
14207 
14208     strregname = get_tv_string_chk(argvars);
14209     rettv->vval.v_number = 1;		/* FAIL is default */
14210 
14211     if (strregname == NULL)
14212 	return;		/* type error; errmsg already given */
14213     regname = *strregname;
14214     if (regname == 0 || regname == '@')
14215 	regname = '"';
14216     else if (regname == '=')
14217 	return;
14218 
14219     if (argvars[2].v_type != VAR_UNKNOWN)
14220     {
14221 	stropt = get_tv_string_chk(&argvars[2]);
14222 	if (stropt == NULL)
14223 	    return;		/* type error */
14224 	for (; *stropt != NUL; ++stropt)
14225 	    switch (*stropt)
14226 	    {
14227 		case 'a': case 'A':	/* append */
14228 		    append = TRUE;
14229 		    break;
14230 		case 'v': case 'c':	/* character-wise selection */
14231 		    yank_type = MCHAR;
14232 		    break;
14233 		case 'V': case 'l':	/* line-wise selection */
14234 		    yank_type = MLINE;
14235 		    break;
14236 #ifdef FEAT_VISUAL
14237 		case 'b': case Ctrl_V:	/* block-wise selection */
14238 		    yank_type = MBLOCK;
14239 		    if (VIM_ISDIGIT(stropt[1]))
14240 		    {
14241 			++stropt;
14242 			block_len = getdigits(&stropt) - 1;
14243 			--stropt;
14244 		    }
14245 		    break;
14246 #endif
14247 	    }
14248     }
14249 
14250     strval = get_tv_string_chk(&argvars[1]);
14251     if (strval != NULL)
14252 	write_reg_contents_ex(regname, strval, -1,
14253 						append, yank_type, block_len);
14254     rettv->vval.v_number = 0;
14255 }
14256 
14257 
14258 /*
14259  * "setwinvar(expr)" function
14260  */
14261 /*ARGSUSED*/
14262     static void
14263 f_setwinvar(argvars, rettv)
14264     typval_T	*argvars;
14265     typval_T	*rettv;
14266 {
14267     win_T	*win;
14268 #ifdef FEAT_WINDOWS
14269     win_T	*save_curwin;
14270 #endif
14271     char_u	*varname, *winvarname;
14272     typval_T	*varp;
14273     char_u	nbuf[NUMBUFLEN];
14274 
14275     rettv->vval.v_number = 0;
14276 
14277     if (check_restricted() || check_secure())
14278 	return;
14279     win = find_win_by_nr(&argvars[0]);
14280     varname = get_tv_string_chk(&argvars[1]);
14281     varp = &argvars[2];
14282 
14283     if (win != NULL && varname != NULL && varp != NULL)
14284     {
14285 #ifdef FEAT_WINDOWS
14286 	/* set curwin to be our win, temporarily */
14287 	save_curwin = curwin;
14288 	curwin = win;
14289 	curbuf = curwin->w_buffer;
14290 #endif
14291 
14292 	if (*varname == '&')
14293 	{
14294 	    long	numval;
14295 	    char_u	*strval;
14296 	    int		error = FALSE;
14297 
14298 	    ++varname;
14299 	    numval = get_tv_number_chk(varp, &error);
14300 	    strval = get_tv_string_buf_chk(varp, nbuf);
14301 	    if (!error && strval != NULL)
14302 		set_option_value(varname, numval, strval, OPT_LOCAL);
14303 	}
14304 	else
14305 	{
14306 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
14307 	    if (winvarname != NULL)
14308 	    {
14309 		STRCPY(winvarname, "w:");
14310 		STRCPY(winvarname + 2, varname);
14311 		set_var(winvarname, varp, TRUE);
14312 		vim_free(winvarname);
14313 	    }
14314 	}
14315 
14316 #ifdef FEAT_WINDOWS
14317 	/* Restore current window, if it's still valid (autocomands can make
14318 	 * it invalid). */
14319 	if (win_valid(save_curwin))
14320 	{
14321 	    curwin = save_curwin;
14322 	    curbuf = curwin->w_buffer;
14323 	}
14324 #endif
14325     }
14326 }
14327 
14328 /*
14329  * "simplify()" function
14330  */
14331     static void
14332 f_simplify(argvars, rettv)
14333     typval_T	*argvars;
14334     typval_T	*rettv;
14335 {
14336     char_u	*p;
14337 
14338     p = get_tv_string(&argvars[0]);
14339     rettv->vval.v_string = vim_strsave(p);
14340     simplify_filename(rettv->vval.v_string);	/* simplify in place */
14341     rettv->v_type = VAR_STRING;
14342 }
14343 
14344 static int
14345 #ifdef __BORLANDC__
14346     _RTLENTRYF
14347 #endif
14348 	item_compare __ARGS((const void *s1, const void *s2));
14349 static int
14350 #ifdef __BORLANDC__
14351     _RTLENTRYF
14352 #endif
14353 	item_compare2 __ARGS((const void *s1, const void *s2));
14354 
14355 static int	item_compare_ic;
14356 static char_u	*item_compare_func;
14357 static int	item_compare_func_err;
14358 #define ITEM_COMPARE_FAIL 999
14359 
14360 /*
14361  * Compare functions for f_sort() below.
14362  */
14363     static int
14364 #ifdef __BORLANDC__
14365 _RTLENTRYF
14366 #endif
14367 item_compare(s1, s2)
14368     const void	*s1;
14369     const void	*s2;
14370 {
14371     char_u	*p1, *p2;
14372     char_u	*tofree1, *tofree2;
14373     int		res;
14374     char_u	numbuf1[NUMBUFLEN];
14375     char_u	numbuf2[NUMBUFLEN];
14376 
14377     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1, 0);
14378     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2, 0);
14379     if (item_compare_ic)
14380 	res = STRICMP(p1, p2);
14381     else
14382 	res = STRCMP(p1, p2);
14383     vim_free(tofree1);
14384     vim_free(tofree2);
14385     return res;
14386 }
14387 
14388     static int
14389 #ifdef __BORLANDC__
14390 _RTLENTRYF
14391 #endif
14392 item_compare2(s1, s2)
14393     const void	*s1;
14394     const void	*s2;
14395 {
14396     int		res;
14397     typval_T	rettv;
14398     typval_T	argv[2];
14399     int		dummy;
14400 
14401     /* shortcut after failure in previous call; compare all items equal */
14402     if (item_compare_func_err)
14403 	return 0;
14404 
14405     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
14406      * in the copy without changing the original list items. */
14407     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
14408     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
14409 
14410     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
14411     res = call_func(item_compare_func, STRLEN(item_compare_func),
14412 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
14413     clear_tv(&argv[0]);
14414     clear_tv(&argv[1]);
14415 
14416     if (res == FAIL)
14417 	res = ITEM_COMPARE_FAIL;
14418     else
14419 	/* return value has wrong type */
14420 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
14421     if (item_compare_func_err)
14422 	res = ITEM_COMPARE_FAIL;
14423     clear_tv(&rettv);
14424     return res;
14425 }
14426 
14427 /*
14428  * "sort({list})" function
14429  */
14430     static void
14431 f_sort(argvars, rettv)
14432     typval_T	*argvars;
14433     typval_T	*rettv;
14434 {
14435     list_T	*l;
14436     listitem_T	*li;
14437     listitem_T	**ptrs;
14438     long	len;
14439     long	i;
14440 
14441     rettv->vval.v_number = 0;
14442     if (argvars[0].v_type != VAR_LIST)
14443 	EMSG2(_(e_listarg), "sort()");
14444     else
14445     {
14446 	l = argvars[0].vval.v_list;
14447 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
14448 	    return;
14449 	rettv->vval.v_list = l;
14450 	rettv->v_type = VAR_LIST;
14451 	++l->lv_refcount;
14452 
14453 	len = list_len(l);
14454 	if (len <= 1)
14455 	    return;	/* short list sorts pretty quickly */
14456 
14457 	item_compare_ic = FALSE;
14458 	item_compare_func = NULL;
14459 	if (argvars[1].v_type != VAR_UNKNOWN)
14460 	{
14461 	    if (argvars[1].v_type == VAR_FUNC)
14462 		item_compare_func = argvars[1].vval.v_string;
14463 	    else
14464 	    {
14465 		int	    error = FALSE;
14466 
14467 		i = get_tv_number_chk(&argvars[1], &error);
14468 		if (error)
14469 		    return;		/* type error; errmsg already given */
14470 		if (i == 1)
14471 		    item_compare_ic = TRUE;
14472 		else
14473 		    item_compare_func = get_tv_string(&argvars[1]);
14474 	    }
14475 	}
14476 
14477 	/* Make an array with each entry pointing to an item in the List. */
14478 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
14479 	if (ptrs == NULL)
14480 	    return;
14481 	i = 0;
14482 	for (li = l->lv_first; li != NULL; li = li->li_next)
14483 	    ptrs[i++] = li;
14484 
14485 	item_compare_func_err = FALSE;
14486 	/* test the compare function */
14487 	if (item_compare_func != NULL
14488 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
14489 							 == ITEM_COMPARE_FAIL)
14490 	    EMSG(_("E702: Sort compare function failed"));
14491 	else
14492 	{
14493 	    /* Sort the array with item pointers. */
14494 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
14495 		    item_compare_func == NULL ? item_compare : item_compare2);
14496 
14497 	    if (!item_compare_func_err)
14498 	    {
14499 		/* Clear the List and append the items in the sorted order. */
14500 		l->lv_first = l->lv_last = NULL;
14501 		l->lv_len = 0;
14502 		for (i = 0; i < len; ++i)
14503 		    list_append(l, ptrs[i]);
14504 	    }
14505 	}
14506 
14507 	vim_free(ptrs);
14508     }
14509 }
14510 
14511 /*
14512  * "soundfold({word})" function
14513  */
14514     static void
14515 f_soundfold(argvars, rettv)
14516     typval_T	*argvars;
14517     typval_T	*rettv;
14518 {
14519     char_u	*s;
14520 
14521     rettv->v_type = VAR_STRING;
14522     s = get_tv_string(&argvars[0]);
14523 #ifdef FEAT_SPELL
14524     rettv->vval.v_string = eval_soundfold(s);
14525 #else
14526     rettv->vval.v_string = vim_strsave(s);
14527 #endif
14528 }
14529 
14530 /*
14531  * "spellbadword()" function
14532  */
14533 /* ARGSUSED */
14534     static void
14535 f_spellbadword(argvars, rettv)
14536     typval_T	*argvars;
14537     typval_T	*rettv;
14538 {
14539     char_u	*word = (char_u *)"";
14540     hlf_T	attr = HLF_COUNT;
14541     int		len = 0;
14542 
14543     if (rettv_list_alloc(rettv) == FAIL)
14544 	return;
14545 
14546 #ifdef FEAT_SPELL
14547     if (argvars[0].v_type == VAR_UNKNOWN)
14548     {
14549 	/* Find the start and length of the badly spelled word. */
14550 	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
14551 	if (len != 0)
14552 	    word = ml_get_cursor();
14553     }
14554     else if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14555     {
14556 	char_u	*str = get_tv_string_chk(&argvars[0]);
14557 	int	capcol = -1;
14558 
14559 	if (str != NULL)
14560 	{
14561 	    /* Check the argument for spelling. */
14562 	    while (*str != NUL)
14563 	    {
14564 		len = spell_check(curwin, str, &attr, &capcol, FALSE);
14565 		if (attr != HLF_COUNT)
14566 		{
14567 		    word = str;
14568 		    break;
14569 		}
14570 		str += len;
14571 	    }
14572 	}
14573     }
14574 #endif
14575 
14576     list_append_string(rettv->vval.v_list, word, len);
14577     list_append_string(rettv->vval.v_list, (char_u *)(
14578 			attr == HLF_SPB ? "bad" :
14579 			attr == HLF_SPR ? "rare" :
14580 			attr == HLF_SPL ? "local" :
14581 			attr == HLF_SPC ? "caps" :
14582 			""), -1);
14583 }
14584 
14585 /*
14586  * "spellsuggest()" function
14587  */
14588 /*ARGSUSED*/
14589     static void
14590 f_spellsuggest(argvars, rettv)
14591     typval_T	*argvars;
14592     typval_T	*rettv;
14593 {
14594 #ifdef FEAT_SPELL
14595     char_u	*str;
14596     int		typeerr = FALSE;
14597     int		maxcount;
14598     garray_T	ga;
14599     int		i;
14600     listitem_T	*li;
14601     int		need_capital = FALSE;
14602 #endif
14603 
14604     if (rettv_list_alloc(rettv) == FAIL)
14605 	return;
14606 
14607 #ifdef FEAT_SPELL
14608     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14609     {
14610 	str = get_tv_string(&argvars[0]);
14611 	if (argvars[1].v_type != VAR_UNKNOWN)
14612 	{
14613 	    maxcount = get_tv_number_chk(&argvars[1], &typeerr);
14614 	    if (maxcount <= 0)
14615 		return;
14616 	    if (argvars[2].v_type != VAR_UNKNOWN)
14617 	    {
14618 		need_capital = get_tv_number_chk(&argvars[2], &typeerr);
14619 		if (typeerr)
14620 		    return;
14621 	    }
14622 	}
14623 	else
14624 	    maxcount = 25;
14625 
14626 	spell_suggest_list(&ga, str, maxcount, need_capital, FALSE);
14627 
14628 	for (i = 0; i < ga.ga_len; ++i)
14629 	{
14630 	    str = ((char_u **)ga.ga_data)[i];
14631 
14632 	    li = listitem_alloc();
14633 	    if (li == NULL)
14634 		vim_free(str);
14635 	    else
14636 	    {
14637 		li->li_tv.v_type = VAR_STRING;
14638 		li->li_tv.v_lock = 0;
14639 		li->li_tv.vval.v_string = str;
14640 		list_append(rettv->vval.v_list, li);
14641 	    }
14642 	}
14643 	ga_clear(&ga);
14644     }
14645 #endif
14646 }
14647 
14648     static void
14649 f_split(argvars, rettv)
14650     typval_T	*argvars;
14651     typval_T	*rettv;
14652 {
14653     char_u	*str;
14654     char_u	*end;
14655     char_u	*pat = NULL;
14656     regmatch_T	regmatch;
14657     char_u	patbuf[NUMBUFLEN];
14658     char_u	*save_cpo;
14659     int		match;
14660     colnr_T	col = 0;
14661     int		keepempty = FALSE;
14662     int		typeerr = FALSE;
14663 
14664     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
14665     save_cpo = p_cpo;
14666     p_cpo = (char_u *)"";
14667 
14668     str = get_tv_string(&argvars[0]);
14669     if (argvars[1].v_type != VAR_UNKNOWN)
14670     {
14671 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14672 	if (pat == NULL)
14673 	    typeerr = TRUE;
14674 	if (argvars[2].v_type != VAR_UNKNOWN)
14675 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
14676     }
14677     if (pat == NULL || *pat == NUL)
14678 	pat = (char_u *)"[\\x01- ]\\+";
14679 
14680     if (rettv_list_alloc(rettv) == FAIL)
14681 	return;
14682     if (typeerr)
14683 	return;
14684 
14685     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
14686     if (regmatch.regprog != NULL)
14687     {
14688 	regmatch.rm_ic = FALSE;
14689 	while (*str != NUL || keepempty)
14690 	{
14691 	    if (*str == NUL)
14692 		match = FALSE;	/* empty item at the end */
14693 	    else
14694 		match = vim_regexec_nl(&regmatch, str, col);
14695 	    if (match)
14696 		end = regmatch.startp[0];
14697 	    else
14698 		end = str + STRLEN(str);
14699 	    if (keepempty || end > str || (rettv->vval.v_list->lv_len > 0
14700 			   && *str != NUL && match && end < regmatch.endp[0]))
14701 	    {
14702 		if (list_append_string(rettv->vval.v_list, str,
14703 						    (int)(end - str)) == FAIL)
14704 		    break;
14705 	    }
14706 	    if (!match)
14707 		break;
14708 	    /* Advance to just after the match. */
14709 	    if (regmatch.endp[0] > str)
14710 		col = 0;
14711 	    else
14712 	    {
14713 		/* Don't get stuck at the same match. */
14714 #ifdef FEAT_MBYTE
14715 		col = (*mb_ptr2len)(regmatch.endp[0]);
14716 #else
14717 		col = 1;
14718 #endif
14719 	    }
14720 	    str = regmatch.endp[0];
14721 	}
14722 
14723 	vim_free(regmatch.regprog);
14724     }
14725 
14726     p_cpo = save_cpo;
14727 }
14728 
14729 /*
14730  * "str2nr()" function
14731  */
14732     static void
14733 f_str2nr(argvars, rettv)
14734     typval_T	*argvars;
14735     typval_T	*rettv;
14736 {
14737     int		base = 10;
14738     char_u	*p;
14739     long	n;
14740 
14741     if (argvars[1].v_type != VAR_UNKNOWN)
14742     {
14743 	base = get_tv_number(&argvars[1]);
14744 	if (base != 8 && base != 10 && base != 16)
14745 	{
14746 	    EMSG(_(e_invarg));
14747 	    return;
14748 	}
14749     }
14750 
14751     p = skipwhite(get_tv_string(&argvars[0]));
14752     vim_str2nr(p, NULL, NULL, base == 8 ? 2 : 0, base == 16 ? 2 : 0, &n, NULL);
14753     rettv->vval.v_number = n;
14754 }
14755 
14756 #ifdef HAVE_STRFTIME
14757 /*
14758  * "strftime({format}[, {time}])" function
14759  */
14760     static void
14761 f_strftime(argvars, rettv)
14762     typval_T	*argvars;
14763     typval_T	*rettv;
14764 {
14765     char_u	result_buf[256];
14766     struct tm	*curtime;
14767     time_t	seconds;
14768     char_u	*p;
14769 
14770     rettv->v_type = VAR_STRING;
14771 
14772     p = get_tv_string(&argvars[0]);
14773     if (argvars[1].v_type == VAR_UNKNOWN)
14774 	seconds = time(NULL);
14775     else
14776 	seconds = (time_t)get_tv_number(&argvars[1]);
14777     curtime = localtime(&seconds);
14778     /* MSVC returns NULL for an invalid value of seconds. */
14779     if (curtime == NULL)
14780 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
14781     else
14782     {
14783 # ifdef FEAT_MBYTE
14784 	vimconv_T   conv;
14785 	char_u	    *enc;
14786 
14787 	conv.vc_type = CONV_NONE;
14788 	enc = enc_locale();
14789 	convert_setup(&conv, p_enc, enc);
14790 	if (conv.vc_type != CONV_NONE)
14791 	    p = string_convert(&conv, p, NULL);
14792 # endif
14793 	if (p != NULL)
14794 	    (void)strftime((char *)result_buf, sizeof(result_buf),
14795 							  (char *)p, curtime);
14796 	else
14797 	    result_buf[0] = NUL;
14798 
14799 # ifdef FEAT_MBYTE
14800 	if (conv.vc_type != CONV_NONE)
14801 	    vim_free(p);
14802 	convert_setup(&conv, enc, p_enc);
14803 	if (conv.vc_type != CONV_NONE)
14804 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
14805 	else
14806 # endif
14807 	    rettv->vval.v_string = vim_strsave(result_buf);
14808 
14809 # ifdef FEAT_MBYTE
14810 	/* Release conversion descriptors */
14811 	convert_setup(&conv, NULL, NULL);
14812 	vim_free(enc);
14813 # endif
14814     }
14815 }
14816 #endif
14817 
14818 /*
14819  * "stridx()" function
14820  */
14821     static void
14822 f_stridx(argvars, rettv)
14823     typval_T	*argvars;
14824     typval_T	*rettv;
14825 {
14826     char_u	buf[NUMBUFLEN];
14827     char_u	*needle;
14828     char_u	*haystack;
14829     char_u	*save_haystack;
14830     char_u	*pos;
14831     int		start_idx;
14832 
14833     needle = get_tv_string_chk(&argvars[1]);
14834     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
14835     rettv->vval.v_number = -1;
14836     if (needle == NULL || haystack == NULL)
14837 	return;		/* type error; errmsg already given */
14838 
14839     if (argvars[2].v_type != VAR_UNKNOWN)
14840     {
14841 	int	    error = FALSE;
14842 
14843 	start_idx = get_tv_number_chk(&argvars[2], &error);
14844 	if (error || start_idx >= (int)STRLEN(haystack))
14845 	    return;
14846 	if (start_idx >= 0)
14847 	    haystack += start_idx;
14848     }
14849 
14850     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14851     if (pos != NULL)
14852 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14853 }
14854 
14855 /*
14856  * "string()" function
14857  */
14858     static void
14859 f_string(argvars, rettv)
14860     typval_T	*argvars;
14861     typval_T	*rettv;
14862 {
14863     char_u	*tofree;
14864     char_u	numbuf[NUMBUFLEN];
14865 
14866     rettv->v_type = VAR_STRING;
14867     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf, 0);
14868     if (tofree == NULL)
14869 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14870 }
14871 
14872 /*
14873  * "strlen()" function
14874  */
14875     static void
14876 f_strlen(argvars, rettv)
14877     typval_T	*argvars;
14878     typval_T	*rettv;
14879 {
14880     rettv->vval.v_number = (varnumber_T)(STRLEN(
14881 					      get_tv_string(&argvars[0])));
14882 }
14883 
14884 /*
14885  * "strpart()" function
14886  */
14887     static void
14888 f_strpart(argvars, rettv)
14889     typval_T	*argvars;
14890     typval_T	*rettv;
14891 {
14892     char_u	*p;
14893     int		n;
14894     int		len;
14895     int		slen;
14896     int		error = FALSE;
14897 
14898     p = get_tv_string(&argvars[0]);
14899     slen = (int)STRLEN(p);
14900 
14901     n = get_tv_number_chk(&argvars[1], &error);
14902     if (error)
14903 	len = 0;
14904     else if (argvars[2].v_type != VAR_UNKNOWN)
14905 	len = get_tv_number(&argvars[2]);
14906     else
14907 	len = slen - n;	    /* default len: all bytes that are available. */
14908 
14909     /*
14910      * Only return the overlap between the specified part and the actual
14911      * string.
14912      */
14913     if (n < 0)
14914     {
14915 	len += n;
14916 	n = 0;
14917     }
14918     else if (n > slen)
14919 	n = slen;
14920     if (len < 0)
14921 	len = 0;
14922     else if (n + len > slen)
14923 	len = slen - n;
14924 
14925     rettv->v_type = VAR_STRING;
14926     rettv->vval.v_string = vim_strnsave(p + n, len);
14927 }
14928 
14929 /*
14930  * "strridx()" function
14931  */
14932     static void
14933 f_strridx(argvars, rettv)
14934     typval_T	*argvars;
14935     typval_T	*rettv;
14936 {
14937     char_u	buf[NUMBUFLEN];
14938     char_u	*needle;
14939     char_u	*haystack;
14940     char_u	*rest;
14941     char_u	*lastmatch = NULL;
14942     int		haystack_len, end_idx;
14943 
14944     needle = get_tv_string_chk(&argvars[1]);
14945     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14946     haystack_len = STRLEN(haystack);
14947 
14948     rettv->vval.v_number = -1;
14949     if (needle == NULL || haystack == NULL)
14950 	return;		/* type error; errmsg already given */
14951     if (argvars[2].v_type != VAR_UNKNOWN)
14952     {
14953 	/* Third argument: upper limit for index */
14954 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14955 	if (end_idx < 0)
14956 	    return;	/* can never find a match */
14957     }
14958     else
14959 	end_idx = haystack_len;
14960 
14961     if (*needle == NUL)
14962     {
14963 	/* Empty string matches past the end. */
14964 	lastmatch = haystack + end_idx;
14965     }
14966     else
14967     {
14968 	for (rest = haystack; *rest != '\0'; ++rest)
14969 	{
14970 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14971 	    if (rest == NULL || rest > haystack + end_idx)
14972 		break;
14973 	    lastmatch = rest;
14974 	}
14975     }
14976 
14977     if (lastmatch == NULL)
14978 	rettv->vval.v_number = -1;
14979     else
14980 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14981 }
14982 
14983 /*
14984  * "strtrans()" function
14985  */
14986     static void
14987 f_strtrans(argvars, rettv)
14988     typval_T	*argvars;
14989     typval_T	*rettv;
14990 {
14991     rettv->v_type = VAR_STRING;
14992     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14993 }
14994 
14995 /*
14996  * "submatch()" function
14997  */
14998     static void
14999 f_submatch(argvars, rettv)
15000     typval_T	*argvars;
15001     typval_T	*rettv;
15002 {
15003     rettv->v_type = VAR_STRING;
15004     rettv->vval.v_string =
15005 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
15006 }
15007 
15008 /*
15009  * "substitute()" function
15010  */
15011     static void
15012 f_substitute(argvars, rettv)
15013     typval_T	*argvars;
15014     typval_T	*rettv;
15015 {
15016     char_u	patbuf[NUMBUFLEN];
15017     char_u	subbuf[NUMBUFLEN];
15018     char_u	flagsbuf[NUMBUFLEN];
15019 
15020     char_u	*str = get_tv_string_chk(&argvars[0]);
15021     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
15022     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
15023     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
15024 
15025     rettv->v_type = VAR_STRING;
15026     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
15027 	rettv->vval.v_string = NULL;
15028     else
15029 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
15030 }
15031 
15032 /*
15033  * "synID(lnum, col, trans)" function
15034  */
15035 /*ARGSUSED*/
15036     static void
15037 f_synID(argvars, rettv)
15038     typval_T	*argvars;
15039     typval_T	*rettv;
15040 {
15041     int		id = 0;
15042 #ifdef FEAT_SYN_HL
15043     long	lnum;
15044     long	col;
15045     int		trans;
15046     int		transerr = FALSE;
15047 
15048     lnum = get_tv_lnum(argvars);		/* -1 on type error */
15049     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
15050     trans = get_tv_number_chk(&argvars[2], &transerr);
15051 
15052     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
15053 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
15054 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
15055 #endif
15056 
15057     rettv->vval.v_number = id;
15058 }
15059 
15060 /*
15061  * "synIDattr(id, what [, mode])" function
15062  */
15063 /*ARGSUSED*/
15064     static void
15065 f_synIDattr(argvars, rettv)
15066     typval_T	*argvars;
15067     typval_T	*rettv;
15068 {
15069     char_u	*p = NULL;
15070 #ifdef FEAT_SYN_HL
15071     int		id;
15072     char_u	*what;
15073     char_u	*mode;
15074     char_u	modebuf[NUMBUFLEN];
15075     int		modec;
15076 
15077     id = get_tv_number(&argvars[0]);
15078     what = get_tv_string(&argvars[1]);
15079     if (argvars[2].v_type != VAR_UNKNOWN)
15080     {
15081 	mode = get_tv_string_buf(&argvars[2], modebuf);
15082 	modec = TOLOWER_ASC(mode[0]);
15083 	if (modec != 't' && modec != 'c'
15084 #ifdef FEAT_GUI
15085 		&& modec != 'g'
15086 #endif
15087 		)
15088 	    modec = 0;	/* replace invalid with current */
15089     }
15090     else
15091     {
15092 #ifdef FEAT_GUI
15093 	if (gui.in_use)
15094 	    modec = 'g';
15095 	else
15096 #endif
15097 	    if (t_colors > 1)
15098 	    modec = 'c';
15099 	else
15100 	    modec = 't';
15101     }
15102 
15103 
15104     switch (TOLOWER_ASC(what[0]))
15105     {
15106 	case 'b':
15107 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
15108 		    p = highlight_color(id, what, modec);
15109 		else					/* bold */
15110 		    p = highlight_has_attr(id, HL_BOLD, modec);
15111 		break;
15112 
15113 	case 'f':					/* fg[#] */
15114 		p = highlight_color(id, what, modec);
15115 		break;
15116 
15117 	case 'i':
15118 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
15119 		    p = highlight_has_attr(id, HL_INVERSE, modec);
15120 		else					/* italic */
15121 		    p = highlight_has_attr(id, HL_ITALIC, modec);
15122 		break;
15123 
15124 	case 'n':					/* name */
15125 		p = get_highlight_name(NULL, id - 1);
15126 		break;
15127 
15128 	case 'r':					/* reverse */
15129 		p = highlight_has_attr(id, HL_INVERSE, modec);
15130 		break;
15131 
15132 	case 's':					/* standout */
15133 		p = highlight_has_attr(id, HL_STANDOUT, modec);
15134 		break;
15135 
15136 	case 'u':
15137 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
15138 							/* underline */
15139 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
15140 		else
15141 							/* undercurl */
15142 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
15143 		break;
15144     }
15145 
15146     if (p != NULL)
15147 	p = vim_strsave(p);
15148 #endif
15149     rettv->v_type = VAR_STRING;
15150     rettv->vval.v_string = p;
15151 }
15152 
15153 /*
15154  * "synIDtrans(id)" function
15155  */
15156 /*ARGSUSED*/
15157     static void
15158 f_synIDtrans(argvars, rettv)
15159     typval_T	*argvars;
15160     typval_T	*rettv;
15161 {
15162     int		id;
15163 
15164 #ifdef FEAT_SYN_HL
15165     id = get_tv_number(&argvars[0]);
15166 
15167     if (id > 0)
15168 	id = syn_get_final_id(id);
15169     else
15170 #endif
15171 	id = 0;
15172 
15173     rettv->vval.v_number = id;
15174 }
15175 
15176 /*
15177  * "system()" function
15178  */
15179     static void
15180 f_system(argvars, rettv)
15181     typval_T	*argvars;
15182     typval_T	*rettv;
15183 {
15184     char_u	*res = NULL;
15185     char_u	*p;
15186     char_u	*infile = NULL;
15187     char_u	buf[NUMBUFLEN];
15188     int		err = FALSE;
15189     FILE	*fd;
15190 
15191     if (argvars[1].v_type != VAR_UNKNOWN)
15192     {
15193 	/*
15194 	 * Write the string to a temp file, to be used for input of the shell
15195 	 * command.
15196 	 */
15197 	if ((infile = vim_tempname('i')) == NULL)
15198 	{
15199 	    EMSG(_(e_notmp));
15200 	    return;
15201 	}
15202 
15203 	fd = mch_fopen((char *)infile, WRITEBIN);
15204 	if (fd == NULL)
15205 	{
15206 	    EMSG2(_(e_notopen), infile);
15207 	    goto done;
15208 	}
15209 	p = get_tv_string_buf_chk(&argvars[1], buf);
15210 	if (p == NULL)
15211 	    goto done;		/* type error; errmsg already given */
15212 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
15213 	    err = TRUE;
15214 	if (fclose(fd) != 0)
15215 	    err = TRUE;
15216 	if (err)
15217 	{
15218 	    EMSG(_("E677: Error writing temp file"));
15219 	    goto done;
15220 	}
15221     }
15222 
15223     res = get_cmd_output(get_tv_string(&argvars[0]), infile,
15224 						 SHELL_SILENT | SHELL_COOKED);
15225 
15226 #ifdef USE_CR
15227     /* translate <CR> into <NL> */
15228     if (res != NULL)
15229     {
15230 	char_u	*s;
15231 
15232 	for (s = res; *s; ++s)
15233 	{
15234 	    if (*s == CAR)
15235 		*s = NL;
15236 	}
15237     }
15238 #else
15239 # ifdef USE_CRNL
15240     /* translate <CR><NL> into <NL> */
15241     if (res != NULL)
15242     {
15243 	char_u	*s, *d;
15244 
15245 	d = res;
15246 	for (s = res; *s; ++s)
15247 	{
15248 	    if (s[0] == CAR && s[1] == NL)
15249 		++s;
15250 	    *d++ = *s;
15251 	}
15252 	*d = NUL;
15253     }
15254 # endif
15255 #endif
15256 
15257 done:
15258     if (infile != NULL)
15259     {
15260 	mch_remove(infile);
15261 	vim_free(infile);
15262     }
15263     rettv->v_type = VAR_STRING;
15264     rettv->vval.v_string = res;
15265 }
15266 
15267 /*
15268  * "tabpagebuflist()" function
15269  */
15270 /* ARGSUSED */
15271     static void
15272 f_tabpagebuflist(argvars, rettv)
15273     typval_T	*argvars;
15274     typval_T	*rettv;
15275 {
15276 #ifndef FEAT_WINDOWS
15277     rettv->vval.v_number = 0;
15278 #else
15279     tabpage_T	*tp;
15280     win_T	*wp = NULL;
15281 
15282     if (argvars[0].v_type == VAR_UNKNOWN)
15283 	wp = firstwin;
15284     else
15285     {
15286 	tp = find_tabpage((int)get_tv_number(&argvars[0]));
15287 	if (tp != NULL)
15288 	    wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15289     }
15290     if (wp == NULL)
15291 	rettv->vval.v_number = 0;
15292     else
15293     {
15294 	if (rettv_list_alloc(rettv) == FAIL)
15295 	    rettv->vval.v_number = 0;
15296 	else
15297 	{
15298 	    for (; wp != NULL; wp = wp->w_next)
15299 		if (list_append_number(rettv->vval.v_list,
15300 						wp->w_buffer->b_fnum) == FAIL)
15301 		    break;
15302 	}
15303     }
15304 #endif
15305 }
15306 
15307 
15308 /*
15309  * "tabpagenr()" function
15310  */
15311 /* ARGSUSED */
15312     static void
15313 f_tabpagenr(argvars, rettv)
15314     typval_T	*argvars;
15315     typval_T	*rettv;
15316 {
15317     int		nr = 1;
15318 #ifdef FEAT_WINDOWS
15319     char_u	*arg;
15320 
15321     if (argvars[0].v_type != VAR_UNKNOWN)
15322     {
15323 	arg = get_tv_string_chk(&argvars[0]);
15324 	nr = 0;
15325 	if (arg != NULL)
15326 	{
15327 	    if (STRCMP(arg, "$") == 0)
15328 		nr = tabpage_index(NULL) - 1;
15329 	    else
15330 		EMSG2(_(e_invexpr2), arg);
15331 	}
15332     }
15333     else
15334 	nr = tabpage_index(curtab);
15335 #endif
15336     rettv->vval.v_number = nr;
15337 }
15338 
15339 
15340 #ifdef FEAT_WINDOWS
15341 static int get_winnr __ARGS((tabpage_T *tp, typval_T *argvar));
15342 
15343 /*
15344  * Common code for tabpagewinnr() and winnr().
15345  */
15346     static int
15347 get_winnr(tp, argvar)
15348     tabpage_T	*tp;
15349     typval_T	*argvar;
15350 {
15351     win_T	*twin;
15352     int		nr = 1;
15353     win_T	*wp;
15354     char_u	*arg;
15355 
15356     twin = (tp == curtab) ? curwin : tp->tp_curwin;
15357     if (argvar->v_type != VAR_UNKNOWN)
15358     {
15359 	arg = get_tv_string_chk(argvar);
15360 	if (arg == NULL)
15361 	    nr = 0;		/* type error; errmsg already given */
15362 	else if (STRCMP(arg, "$") == 0)
15363 	    twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
15364 	else if (STRCMP(arg, "#") == 0)
15365 	{
15366 	    twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
15367 	    if (twin == NULL)
15368 		nr = 0;
15369 	}
15370 	else
15371 	{
15372 	    EMSG2(_(e_invexpr2), arg);
15373 	    nr = 0;
15374 	}
15375     }
15376 
15377     if (nr > 0)
15378 	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15379 					      wp != twin; wp = wp->w_next)
15380 	    ++nr;
15381     return nr;
15382 }
15383 #endif
15384 
15385 /*
15386  * "tabpagewinnr()" function
15387  */
15388 /* ARGSUSED */
15389     static void
15390 f_tabpagewinnr(argvars, rettv)
15391     typval_T	*argvars;
15392     typval_T	*rettv;
15393 {
15394     int		nr = 1;
15395 #ifdef FEAT_WINDOWS
15396     tabpage_T	*tp;
15397 
15398     tp = find_tabpage((int)get_tv_number(&argvars[0]));
15399     if (tp == NULL)
15400 	nr = 0;
15401     else
15402 	nr = get_winnr(tp, &argvars[1]);
15403 #endif
15404     rettv->vval.v_number = nr;
15405 }
15406 
15407 
15408 /*
15409  * "tagfiles()" function
15410  */
15411 /*ARGSUSED*/
15412     static void
15413 f_tagfiles(argvars, rettv)
15414     typval_T	*argvars;
15415     typval_T	*rettv;
15416 {
15417     char_u	fname[MAXPATHL + 1];
15418     tagname_T	tn;
15419     int		first;
15420 
15421     if (rettv_list_alloc(rettv) == FAIL)
15422     {
15423 	rettv->vval.v_number = 0;
15424 	return;
15425     }
15426 
15427     for (first = TRUE; ; first = FALSE)
15428 	if (get_tagfname(&tn, first, fname) == FAIL
15429 		|| list_append_string(rettv->vval.v_list, fname, -1) == FAIL)
15430 	    break;
15431     tagname_free(&tn);
15432 }
15433 
15434 /*
15435  * "taglist()" function
15436  */
15437     static void
15438 f_taglist(argvars, rettv)
15439     typval_T  *argvars;
15440     typval_T  *rettv;
15441 {
15442     char_u  *tag_pattern;
15443 
15444     tag_pattern = get_tv_string(&argvars[0]);
15445 
15446     rettv->vval.v_number = FALSE;
15447     if (*tag_pattern == NUL)
15448 	return;
15449 
15450     if (rettv_list_alloc(rettv) == OK)
15451 	(void)get_tags(rettv->vval.v_list, tag_pattern);
15452 }
15453 
15454 /*
15455  * "tempname()" function
15456  */
15457 /*ARGSUSED*/
15458     static void
15459 f_tempname(argvars, rettv)
15460     typval_T	*argvars;
15461     typval_T	*rettv;
15462 {
15463     static int	x = 'A';
15464 
15465     rettv->v_type = VAR_STRING;
15466     rettv->vval.v_string = vim_tempname(x);
15467 
15468     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
15469      * names.  Skip 'I' and 'O', they are used for shell redirection. */
15470     do
15471     {
15472 	if (x == 'Z')
15473 	    x = '0';
15474 	else if (x == '9')
15475 	    x = 'A';
15476 	else
15477 	{
15478 #ifdef EBCDIC
15479 	    if (x == 'I')
15480 		x = 'J';
15481 	    else if (x == 'R')
15482 		x = 'S';
15483 	    else
15484 #endif
15485 		++x;
15486 	}
15487     } while (x == 'I' || x == 'O');
15488 }
15489 
15490 /*
15491  * "test(list)" function: Just checking the walls...
15492  */
15493 /*ARGSUSED*/
15494     static void
15495 f_test(argvars, rettv)
15496     typval_T	*argvars;
15497     typval_T	*rettv;
15498 {
15499     /* Used for unit testing.  Change the code below to your liking. */
15500 #if 0
15501     listitem_T	*li;
15502     list_T	*l;
15503     char_u	*bad, *good;
15504 
15505     if (argvars[0].v_type != VAR_LIST)
15506 	return;
15507     l = argvars[0].vval.v_list;
15508     if (l == NULL)
15509 	return;
15510     li = l->lv_first;
15511     if (li == NULL)
15512 	return;
15513     bad = get_tv_string(&li->li_tv);
15514     li = li->li_next;
15515     if (li == NULL)
15516 	return;
15517     good = get_tv_string(&li->li_tv);
15518     rettv->vval.v_number = test_edit_score(bad, good);
15519 #endif
15520 }
15521 
15522 /*
15523  * "tolower(string)" function
15524  */
15525     static void
15526 f_tolower(argvars, rettv)
15527     typval_T	*argvars;
15528     typval_T	*rettv;
15529 {
15530     char_u	*p;
15531 
15532     p = vim_strsave(get_tv_string(&argvars[0]));
15533     rettv->v_type = VAR_STRING;
15534     rettv->vval.v_string = p;
15535 
15536     if (p != NULL)
15537 	while (*p != NUL)
15538 	{
15539 #ifdef FEAT_MBYTE
15540 	    int		l;
15541 
15542 	    if (enc_utf8)
15543 	    {
15544 		int c, lc;
15545 
15546 		c = utf_ptr2char(p);
15547 		lc = utf_tolower(c);
15548 		l = utf_ptr2len(p);
15549 		/* TODO: reallocate string when byte count changes. */
15550 		if (utf_char2len(lc) == l)
15551 		    utf_char2bytes(lc, p);
15552 		p += l;
15553 	    }
15554 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
15555 		p += l;		/* skip multi-byte character */
15556 	    else
15557 #endif
15558 	    {
15559 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
15560 		++p;
15561 	    }
15562 	}
15563 }
15564 
15565 /*
15566  * "toupper(string)" function
15567  */
15568     static void
15569 f_toupper(argvars, rettv)
15570     typval_T	*argvars;
15571     typval_T	*rettv;
15572 {
15573     rettv->v_type = VAR_STRING;
15574     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
15575 }
15576 
15577 /*
15578  * "tr(string, fromstr, tostr)" function
15579  */
15580     static void
15581 f_tr(argvars, rettv)
15582     typval_T	*argvars;
15583     typval_T	*rettv;
15584 {
15585     char_u	*instr;
15586     char_u	*fromstr;
15587     char_u	*tostr;
15588     char_u	*p;
15589 #ifdef FEAT_MBYTE
15590     int		inlen;
15591     int		fromlen;
15592     int		tolen;
15593     int		idx;
15594     char_u	*cpstr;
15595     int		cplen;
15596     int		first = TRUE;
15597 #endif
15598     char_u	buf[NUMBUFLEN];
15599     char_u	buf2[NUMBUFLEN];
15600     garray_T	ga;
15601 
15602     instr = get_tv_string(&argvars[0]);
15603     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
15604     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
15605 
15606     /* Default return value: empty string. */
15607     rettv->v_type = VAR_STRING;
15608     rettv->vval.v_string = NULL;
15609     if (fromstr == NULL || tostr == NULL)
15610 	    return;		/* type error; errmsg already given */
15611     ga_init2(&ga, (int)sizeof(char), 80);
15612 
15613 #ifdef FEAT_MBYTE
15614     if (!has_mbyte)
15615 #endif
15616 	/* not multi-byte: fromstr and tostr must be the same length */
15617 	if (STRLEN(fromstr) != STRLEN(tostr))
15618 	{
15619 #ifdef FEAT_MBYTE
15620 error:
15621 #endif
15622 	    EMSG2(_(e_invarg2), fromstr);
15623 	    ga_clear(&ga);
15624 	    return;
15625 	}
15626 
15627     /* fromstr and tostr have to contain the same number of chars */
15628     while (*instr != NUL)
15629     {
15630 #ifdef FEAT_MBYTE
15631 	if (has_mbyte)
15632 	{
15633 	    inlen = (*mb_ptr2len)(instr);
15634 	    cpstr = instr;
15635 	    cplen = inlen;
15636 	    idx = 0;
15637 	    for (p = fromstr; *p != NUL; p += fromlen)
15638 	    {
15639 		fromlen = (*mb_ptr2len)(p);
15640 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
15641 		{
15642 		    for (p = tostr; *p != NUL; p += tolen)
15643 		    {
15644 			tolen = (*mb_ptr2len)(p);
15645 			if (idx-- == 0)
15646 			{
15647 			    cplen = tolen;
15648 			    cpstr = p;
15649 			    break;
15650 			}
15651 		    }
15652 		    if (*p == NUL)	/* tostr is shorter than fromstr */
15653 			goto error;
15654 		    break;
15655 		}
15656 		++idx;
15657 	    }
15658 
15659 	    if (first && cpstr == instr)
15660 	    {
15661 		/* Check that fromstr and tostr have the same number of
15662 		 * (multi-byte) characters.  Done only once when a character
15663 		 * of instr doesn't appear in fromstr. */
15664 		first = FALSE;
15665 		for (p = tostr; *p != NUL; p += tolen)
15666 		{
15667 		    tolen = (*mb_ptr2len)(p);
15668 		    --idx;
15669 		}
15670 		if (idx != 0)
15671 		    goto error;
15672 	    }
15673 
15674 	    ga_grow(&ga, cplen);
15675 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
15676 	    ga.ga_len += cplen;
15677 
15678 	    instr += inlen;
15679 	}
15680 	else
15681 #endif
15682 	{
15683 	    /* When not using multi-byte chars we can do it faster. */
15684 	    p = vim_strchr(fromstr, *instr);
15685 	    if (p != NULL)
15686 		ga_append(&ga, tostr[p - fromstr]);
15687 	    else
15688 		ga_append(&ga, *instr);
15689 	    ++instr;
15690 	}
15691     }
15692 
15693     rettv->vval.v_string = ga.ga_data;
15694 }
15695 
15696 /*
15697  * "type(expr)" function
15698  */
15699     static void
15700 f_type(argvars, rettv)
15701     typval_T	*argvars;
15702     typval_T	*rettv;
15703 {
15704     int n;
15705 
15706     switch (argvars[0].v_type)
15707     {
15708 	case VAR_NUMBER: n = 0; break;
15709 	case VAR_STRING: n = 1; break;
15710 	case VAR_FUNC:   n = 2; break;
15711 	case VAR_LIST:   n = 3; break;
15712 	case VAR_DICT:   n = 4; break;
15713 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
15714     }
15715     rettv->vval.v_number = n;
15716 }
15717 
15718 /*
15719  * "values(dict)" function
15720  */
15721     static void
15722 f_values(argvars, rettv)
15723     typval_T	*argvars;
15724     typval_T	*rettv;
15725 {
15726     dict_list(argvars, rettv, 1);
15727 }
15728 
15729 /*
15730  * "virtcol(string)" function
15731  */
15732     static void
15733 f_virtcol(argvars, rettv)
15734     typval_T	*argvars;
15735     typval_T	*rettv;
15736 {
15737     colnr_T	vcol = 0;
15738     pos_T	*fp;
15739     int		fnum = curbuf->b_fnum;
15740 
15741     fp = var2fpos(&argvars[0], FALSE, &fnum);
15742     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count
15743 						    && fnum == curbuf->b_fnum)
15744     {
15745 	getvvcol(curwin, fp, NULL, NULL, &vcol);
15746 	++vcol;
15747     }
15748 
15749     rettv->vval.v_number = vcol;
15750 }
15751 
15752 /*
15753  * "visualmode()" function
15754  */
15755 /*ARGSUSED*/
15756     static void
15757 f_visualmode(argvars, rettv)
15758     typval_T	*argvars;
15759     typval_T	*rettv;
15760 {
15761 #ifdef FEAT_VISUAL
15762     char_u	str[2];
15763 
15764     rettv->v_type = VAR_STRING;
15765     str[0] = curbuf->b_visual_mode_eval;
15766     str[1] = NUL;
15767     rettv->vval.v_string = vim_strsave(str);
15768 
15769     /* A non-zero number or non-empty string argument: reset mode. */
15770     if ((argvars[0].v_type == VAR_NUMBER
15771 		&& argvars[0].vval.v_number != 0)
15772 	    || (argvars[0].v_type == VAR_STRING
15773 		&& *get_tv_string(&argvars[0]) != NUL))
15774 	curbuf->b_visual_mode_eval = NUL;
15775 #else
15776     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
15777 #endif
15778 }
15779 
15780 /*
15781  * "winbufnr(nr)" function
15782  */
15783     static void
15784 f_winbufnr(argvars, rettv)
15785     typval_T	*argvars;
15786     typval_T	*rettv;
15787 {
15788     win_T	*wp;
15789 
15790     wp = find_win_by_nr(&argvars[0]);
15791     if (wp == NULL)
15792 	rettv->vval.v_number = -1;
15793     else
15794 	rettv->vval.v_number = wp->w_buffer->b_fnum;
15795 }
15796 
15797 /*
15798  * "wincol()" function
15799  */
15800 /*ARGSUSED*/
15801     static void
15802 f_wincol(argvars, rettv)
15803     typval_T	*argvars;
15804     typval_T	*rettv;
15805 {
15806     validate_cursor();
15807     rettv->vval.v_number = curwin->w_wcol + 1;
15808 }
15809 
15810 /*
15811  * "winheight(nr)" function
15812  */
15813     static void
15814 f_winheight(argvars, rettv)
15815     typval_T	*argvars;
15816     typval_T	*rettv;
15817 {
15818     win_T	*wp;
15819 
15820     wp = find_win_by_nr(&argvars[0]);
15821     if (wp == NULL)
15822 	rettv->vval.v_number = -1;
15823     else
15824 	rettv->vval.v_number = wp->w_height;
15825 }
15826 
15827 /*
15828  * "winline()" function
15829  */
15830 /*ARGSUSED*/
15831     static void
15832 f_winline(argvars, rettv)
15833     typval_T	*argvars;
15834     typval_T	*rettv;
15835 {
15836     validate_cursor();
15837     rettv->vval.v_number = curwin->w_wrow + 1;
15838 }
15839 
15840 /*
15841  * "winnr()" function
15842  */
15843 /* ARGSUSED */
15844     static void
15845 f_winnr(argvars, rettv)
15846     typval_T	*argvars;
15847     typval_T	*rettv;
15848 {
15849     int		nr = 1;
15850 
15851 #ifdef FEAT_WINDOWS
15852     nr = get_winnr(curtab, &argvars[0]);
15853 #endif
15854     rettv->vval.v_number = nr;
15855 }
15856 
15857 /*
15858  * "winrestcmd()" function
15859  */
15860 /* ARGSUSED */
15861     static void
15862 f_winrestcmd(argvars, rettv)
15863     typval_T	*argvars;
15864     typval_T	*rettv;
15865 {
15866 #ifdef FEAT_WINDOWS
15867     win_T	*wp;
15868     int		winnr = 1;
15869     garray_T	ga;
15870     char_u	buf[50];
15871 
15872     ga_init2(&ga, (int)sizeof(char), 70);
15873     for (wp = firstwin; wp != NULL; wp = wp->w_next)
15874     {
15875 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
15876 	ga_concat(&ga, buf);
15877 # ifdef FEAT_VERTSPLIT
15878 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
15879 	ga_concat(&ga, buf);
15880 # endif
15881 	++winnr;
15882     }
15883     ga_append(&ga, NUL);
15884 
15885     rettv->vval.v_string = ga.ga_data;
15886 #else
15887     rettv->vval.v_string = NULL;
15888 #endif
15889     rettv->v_type = VAR_STRING;
15890 }
15891 
15892 /*
15893  * "winrestview()" function
15894  */
15895 /* ARGSUSED */
15896     static void
15897 f_winrestview(argvars, rettv)
15898     typval_T	*argvars;
15899     typval_T	*rettv;
15900 {
15901     dict_T	*dict;
15902 
15903     if (argvars[0].v_type != VAR_DICT
15904 	    || (dict = argvars[0].vval.v_dict) == NULL)
15905 	EMSG(_(e_invarg));
15906     else
15907     {
15908 	curwin->w_cursor.lnum = get_dict_number(dict, (char_u *)"lnum");
15909 	curwin->w_cursor.col = get_dict_number(dict, (char_u *)"col");
15910 #ifdef FEAT_VIRTUALEDIT
15911 	curwin->w_cursor.coladd = get_dict_number(dict, (char_u *)"coladd");
15912 #endif
15913 	curwin->w_curswant = get_dict_number(dict, (char_u *)"curswant");
15914 	curwin->w_set_curswant = FALSE;
15915 
15916 	curwin->w_topline = get_dict_number(dict, (char_u *)"topline");
15917 #ifdef FEAT_DIFF
15918 	curwin->w_topfill = get_dict_number(dict, (char_u *)"topfill");
15919 #endif
15920 	curwin->w_leftcol = get_dict_number(dict, (char_u *)"leftcol");
15921 	curwin->w_skipcol = get_dict_number(dict, (char_u *)"skipcol");
15922 
15923 	check_cursor();
15924 	changed_cline_bef_curs();
15925 	invalidate_botline();
15926 	redraw_later(VALID);
15927 
15928 	if (curwin->w_topline == 0)
15929 	    curwin->w_topline = 1;
15930 	if (curwin->w_topline > curbuf->b_ml.ml_line_count)
15931 	    curwin->w_topline = curbuf->b_ml.ml_line_count;
15932 #ifdef FEAT_DIFF
15933 	check_topfill(curwin, TRUE);
15934 #endif
15935     }
15936 }
15937 
15938 /*
15939  * "winsaveview()" function
15940  */
15941 /* ARGSUSED */
15942     static void
15943 f_winsaveview(argvars, rettv)
15944     typval_T	*argvars;
15945     typval_T	*rettv;
15946 {
15947     dict_T	*dict;
15948 
15949     dict = dict_alloc();
15950     if (dict == NULL)
15951 	return;
15952     rettv->v_type = VAR_DICT;
15953     rettv->vval.v_dict = dict;
15954     ++dict->dv_refcount;
15955 
15956     dict_add_nr_str(dict, "lnum", (long)curwin->w_cursor.lnum, NULL);
15957     dict_add_nr_str(dict, "col", (long)curwin->w_cursor.col, NULL);
15958 #ifdef FEAT_VIRTUALEDIT
15959     dict_add_nr_str(dict, "coladd", (long)curwin->w_cursor.coladd, NULL);
15960 #endif
15961     dict_add_nr_str(dict, "curswant", (long)curwin->w_curswant, NULL);
15962 
15963     dict_add_nr_str(dict, "topline", (long)curwin->w_topline, NULL);
15964 #ifdef FEAT_DIFF
15965     dict_add_nr_str(dict, "topfill", (long)curwin->w_topfill, NULL);
15966 #endif
15967     dict_add_nr_str(dict, "leftcol", (long)curwin->w_leftcol, NULL);
15968     dict_add_nr_str(dict, "skipcol", (long)curwin->w_skipcol, NULL);
15969 }
15970 
15971 /*
15972  * "winwidth(nr)" function
15973  */
15974     static void
15975 f_winwidth(argvars, rettv)
15976     typval_T	*argvars;
15977     typval_T	*rettv;
15978 {
15979     win_T	*wp;
15980 
15981     wp = find_win_by_nr(&argvars[0]);
15982     if (wp == NULL)
15983 	rettv->vval.v_number = -1;
15984     else
15985 #ifdef FEAT_VERTSPLIT
15986 	rettv->vval.v_number = wp->w_width;
15987 #else
15988 	rettv->vval.v_number = Columns;
15989 #endif
15990 }
15991 
15992 /*
15993  * "writefile()" function
15994  */
15995     static void
15996 f_writefile(argvars, rettv)
15997     typval_T	*argvars;
15998     typval_T	*rettv;
15999 {
16000     int		binary = FALSE;
16001     char_u	*fname;
16002     FILE	*fd;
16003     listitem_T	*li;
16004     char_u	*s;
16005     int		ret = 0;
16006     int		c;
16007 
16008     if (argvars[0].v_type != VAR_LIST)
16009     {
16010 	EMSG2(_(e_listarg), "writefile()");
16011 	return;
16012     }
16013     if (argvars[0].vval.v_list == NULL)
16014 	return;
16015 
16016     if (argvars[2].v_type != VAR_UNKNOWN
16017 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
16018 	binary = TRUE;
16019 
16020     /* Always open the file in binary mode, library functions have a mind of
16021      * their own about CR-LF conversion. */
16022     fname = get_tv_string(&argvars[1]);
16023     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
16024     {
16025 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
16026 	ret = -1;
16027     }
16028     else
16029     {
16030 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
16031 							     li = li->li_next)
16032 	{
16033 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
16034 	    {
16035 		if (*s == '\n')
16036 		    c = putc(NUL, fd);
16037 		else
16038 		    c = putc(*s, fd);
16039 		if (c == EOF)
16040 		{
16041 		    ret = -1;
16042 		    break;
16043 		}
16044 	    }
16045 	    if (!binary || li->li_next != NULL)
16046 		if (putc('\n', fd) == EOF)
16047 		{
16048 		    ret = -1;
16049 		    break;
16050 		}
16051 	    if (ret < 0)
16052 	    {
16053 		EMSG(_(e_write));
16054 		break;
16055 	    }
16056 	}
16057 	fclose(fd);
16058     }
16059 
16060     rettv->vval.v_number = ret;
16061 }
16062 
16063 /*
16064  * Translate a String variable into a position.
16065  * Returns NULL when there is an error.
16066  */
16067     static pos_T *
16068 var2fpos(varp, lnum, fnum)
16069     typval_T	*varp;
16070     int		lnum;		/* TRUE when $ is last line */
16071     int		*fnum;		/* set to fnum for '0, 'A, etc. */
16072 {
16073     char_u		*name;
16074     static pos_T	pos;
16075     pos_T		*pp;
16076 
16077     /* Argument can be [lnum, col, coladd]. */
16078     if (varp->v_type == VAR_LIST)
16079     {
16080 	list_T		*l;
16081 	int		len;
16082 	int		error = FALSE;
16083 
16084 	l = varp->vval.v_list;
16085 	if (l == NULL)
16086 	    return NULL;
16087 
16088 	/* Get the line number */
16089 	pos.lnum = list_find_nr(l, 0L, &error);
16090 	if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
16091 	    return NULL;	/* invalid line number */
16092 
16093 	/* Get the column number */
16094 	pos.col = list_find_nr(l, 1L, &error);
16095 	if (error)
16096 	    return NULL;
16097 	len = (long)STRLEN(ml_get(pos.lnum));
16098 	/* Accept a position up to the NUL after the line. */
16099 	if (pos.col <= 0 || (int)pos.col > len + 1)
16100 	    return NULL;	/* invalid column number */
16101 	--pos.col;
16102 
16103 #ifdef FEAT_VIRTUALEDIT
16104 	/* Get the virtual offset.  Defaults to zero. */
16105 	pos.coladd = list_find_nr(l, 2L, &error);
16106 	if (error)
16107 	    pos.coladd = 0;
16108 #endif
16109 
16110 	return &pos;
16111     }
16112 
16113     name = get_tv_string_chk(varp);
16114     if (name == NULL)
16115 	return NULL;
16116     if (name[0] == '.')		/* cursor */
16117 	return &curwin->w_cursor;
16118     if (name[0] == '\'')	/* mark */
16119     {
16120 	pp = getmark_fnum(name[1], FALSE, fnum);
16121 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
16122 	    return NULL;
16123 	return pp;
16124     }
16125 
16126 #ifdef FEAT_VIRTUALEDIT
16127     pos.coladd = 0;
16128 #endif
16129 
16130     if (name[0] == 'w' && lnum)
16131     {
16132 	pos.col = 0;
16133 	if (name[1] == '0')		/* "w0": first visible line */
16134 	{
16135 	    update_topline();
16136 	    pos.lnum = curwin->w_topline;
16137 	    return &pos;
16138 	}
16139 	else if (name[1] == '$')	/* "w$": last visible line */
16140 	{
16141 	    validate_botline();
16142 	    pos.lnum = curwin->w_botline - 1;
16143 	    return &pos;
16144 	}
16145     }
16146     else if (name[0] == '$')		/* last column or line */
16147     {
16148 	if (lnum)
16149 	{
16150 	    pos.lnum = curbuf->b_ml.ml_line_count;
16151 	    pos.col = 0;
16152 	}
16153 	else
16154 	{
16155 	    pos.lnum = curwin->w_cursor.lnum;
16156 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
16157 	}
16158 	return &pos;
16159     }
16160     return NULL;
16161 }
16162 
16163 /*
16164  * Convert list in "arg" into a position and optional file number.
16165  * When "fnump" is NULL there is no file number, only 3 items.
16166  * Note that the column is passed on as-is, the caller may want to decrement
16167  * it to use 1 for the first column.
16168  * Return FAIL when conversion is not possible, doesn't check the position for
16169  * validity.
16170  */
16171     static int
16172 list2fpos(arg, posp, fnump)
16173     typval_T	*arg;
16174     pos_T	*posp;
16175     int		*fnump;
16176 {
16177     list_T	*l = arg->vval.v_list;
16178     long	i = 0;
16179     long	n;
16180 
16181     /* List must be: [fnum, lnum, col, coladd] */
16182     if (arg->v_type != VAR_LIST || l == NULL
16183 				      || l->lv_len != (fnump == NULL ? 3 : 4))
16184 	return FAIL;
16185 
16186     if (fnump != NULL)
16187     {
16188 	n = list_find_nr(l, i++, NULL);	/* fnum */
16189 	if (n < 0)
16190 	    return FAIL;
16191 	if (n == 0)
16192 	    n = curbuf->b_fnum;		/* current buffer */
16193 	*fnump = n;
16194     }
16195 
16196     n = list_find_nr(l, i++, NULL);	/* lnum */
16197     if (n < 0)
16198 	return FAIL;
16199     posp->lnum = n;
16200 
16201     n = list_find_nr(l, i++, NULL);	/* col */
16202     if (n < 0)
16203 	return FAIL;
16204     posp->col = n;
16205 
16206 #ifdef FEAT_VIRTUALEDIT
16207     n = list_find_nr(l, i, NULL);
16208     if (n < 0)
16209 	return FAIL;
16210     posp->coladd = n;
16211 #endif
16212 
16213     return OK;
16214 }
16215 
16216 /*
16217  * Get the length of an environment variable name.
16218  * Advance "arg" to the first character after the name.
16219  * Return 0 for error.
16220  */
16221     static int
16222 get_env_len(arg)
16223     char_u	**arg;
16224 {
16225     char_u	*p;
16226     int		len;
16227 
16228     for (p = *arg; vim_isIDc(*p); ++p)
16229 	;
16230     if (p == *arg)	    /* no name found */
16231 	return 0;
16232 
16233     len = (int)(p - *arg);
16234     *arg = p;
16235     return len;
16236 }
16237 
16238 /*
16239  * Get the length of the name of a function or internal variable.
16240  * "arg" is advanced to the first non-white character after the name.
16241  * Return 0 if something is wrong.
16242  */
16243     static int
16244 get_id_len(arg)
16245     char_u	**arg;
16246 {
16247     char_u	*p;
16248     int		len;
16249 
16250     /* Find the end of the name. */
16251     for (p = *arg; eval_isnamec(*p); ++p)
16252 	;
16253     if (p == *arg)	    /* no name found */
16254 	return 0;
16255 
16256     len = (int)(p - *arg);
16257     *arg = skipwhite(p);
16258 
16259     return len;
16260 }
16261 
16262 /*
16263  * Get the length of the name of a variable or function.
16264  * Only the name is recognized, does not handle ".key" or "[idx]".
16265  * "arg" is advanced to the first non-white character after the name.
16266  * Return -1 if curly braces expansion failed.
16267  * Return 0 if something else is wrong.
16268  * If the name contains 'magic' {}'s, expand them and return the
16269  * expanded name in an allocated string via 'alias' - caller must free.
16270  */
16271     static int
16272 get_name_len(arg, alias, evaluate, verbose)
16273     char_u	**arg;
16274     char_u	**alias;
16275     int		evaluate;
16276     int		verbose;
16277 {
16278     int		len;
16279     char_u	*p;
16280     char_u	*expr_start;
16281     char_u	*expr_end;
16282 
16283     *alias = NULL;  /* default to no alias */
16284 
16285     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
16286 						  && (*arg)[2] == (int)KE_SNR)
16287     {
16288 	/* hard coded <SNR>, already translated */
16289 	*arg += 3;
16290 	return get_id_len(arg) + 3;
16291     }
16292     len = eval_fname_script(*arg);
16293     if (len > 0)
16294     {
16295 	/* literal "<SID>", "s:" or "<SNR>" */
16296 	*arg += len;
16297     }
16298 
16299     /*
16300      * Find the end of the name; check for {} construction.
16301      */
16302     p = find_name_end(*arg, &expr_start, &expr_end,
16303 					       len > 0 ? 0 : FNE_CHECK_START);
16304     if (expr_start != NULL)
16305     {
16306 	char_u	*temp_string;
16307 
16308 	if (!evaluate)
16309 	{
16310 	    len += (int)(p - *arg);
16311 	    *arg = skipwhite(p);
16312 	    return len;
16313 	}
16314 
16315 	/*
16316 	 * Include any <SID> etc in the expanded string:
16317 	 * Thus the -len here.
16318 	 */
16319 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
16320 	if (temp_string == NULL)
16321 	    return -1;
16322 	*alias = temp_string;
16323 	*arg = skipwhite(p);
16324 	return (int)STRLEN(temp_string);
16325     }
16326 
16327     len += get_id_len(arg);
16328     if (len == 0 && verbose)
16329 	EMSG2(_(e_invexpr2), *arg);
16330 
16331     return len;
16332 }
16333 
16334 /*
16335  * Find the end of a variable or function name, taking care of magic braces.
16336  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
16337  * start and end of the first magic braces item.
16338  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
16339  * Return a pointer to just after the name.  Equal to "arg" if there is no
16340  * valid name.
16341  */
16342     static char_u *
16343 find_name_end(arg, expr_start, expr_end, flags)
16344     char_u	*arg;
16345     char_u	**expr_start;
16346     char_u	**expr_end;
16347     int		flags;
16348 {
16349     int		mb_nest = 0;
16350     int		br_nest = 0;
16351     char_u	*p;
16352 
16353     if (expr_start != NULL)
16354     {
16355 	*expr_start = NULL;
16356 	*expr_end = NULL;
16357     }
16358 
16359     /* Quick check for valid starting character. */
16360     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
16361 	return arg;
16362 
16363     for (p = arg; *p != NUL
16364 		    && (eval_isnamec(*p)
16365 			|| *p == '{'
16366 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
16367 			|| mb_nest != 0
16368 			|| br_nest != 0); mb_ptr_adv(p))
16369     {
16370 	if (*p == '\'')
16371 	{
16372 	    /* skip over 'string' to avoid counting [ and ] inside it. */
16373 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
16374 		;
16375 	    if (*p == NUL)
16376 		break;
16377 	}
16378 	else if (*p == '"')
16379 	{
16380 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
16381 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
16382 		if (*p == '\\' && p[1] != NUL)
16383 		    ++p;
16384 	    if (*p == NUL)
16385 		break;
16386 	}
16387 
16388 	if (mb_nest == 0)
16389 	{
16390 	    if (*p == '[')
16391 		++br_nest;
16392 	    else if (*p == ']')
16393 		--br_nest;
16394 	}
16395 
16396 	if (br_nest == 0)
16397 	{
16398 	    if (*p == '{')
16399 	    {
16400 		mb_nest++;
16401 		if (expr_start != NULL && *expr_start == NULL)
16402 		    *expr_start = p;
16403 	    }
16404 	    else if (*p == '}')
16405 	    {
16406 		mb_nest--;
16407 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
16408 		    *expr_end = p;
16409 	    }
16410 	}
16411     }
16412 
16413     return p;
16414 }
16415 
16416 /*
16417  * Expands out the 'magic' {}'s in a variable/function name.
16418  * Note that this can call itself recursively, to deal with
16419  * constructs like foo{bar}{baz}{bam}
16420  * The four pointer arguments point to "foo{expre}ss{ion}bar"
16421  *			"in_start"      ^
16422  *			"expr_start"	   ^
16423  *			"expr_end"		 ^
16424  *			"in_end"			    ^
16425  *
16426  * Returns a new allocated string, which the caller must free.
16427  * Returns NULL for failure.
16428  */
16429     static char_u *
16430 make_expanded_name(in_start, expr_start, expr_end, in_end)
16431     char_u	*in_start;
16432     char_u	*expr_start;
16433     char_u	*expr_end;
16434     char_u	*in_end;
16435 {
16436     char_u	c1;
16437     char_u	*retval = NULL;
16438     char_u	*temp_result;
16439     char_u	*nextcmd = NULL;
16440 
16441     if (expr_end == NULL || in_end == NULL)
16442 	return NULL;
16443     *expr_start	= NUL;
16444     *expr_end = NUL;
16445     c1 = *in_end;
16446     *in_end = NUL;
16447 
16448     temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
16449     if (temp_result != NULL && nextcmd == NULL)
16450     {
16451 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
16452 						   + (in_end - expr_end) + 1));
16453 	if (retval != NULL)
16454 	{
16455 	    STRCPY(retval, in_start);
16456 	    STRCAT(retval, temp_result);
16457 	    STRCAT(retval, expr_end + 1);
16458 	}
16459     }
16460     vim_free(temp_result);
16461 
16462     *in_end = c1;		/* put char back for error messages */
16463     *expr_start = '{';
16464     *expr_end = '}';
16465 
16466     if (retval != NULL)
16467     {
16468 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
16469 	if (expr_start != NULL)
16470 	{
16471 	    /* Further expansion! */
16472 	    temp_result = make_expanded_name(retval, expr_start,
16473 						       expr_end, temp_result);
16474 	    vim_free(retval);
16475 	    retval = temp_result;
16476 	}
16477     }
16478 
16479     return retval;
16480 }
16481 
16482 /*
16483  * Return TRUE if character "c" can be used in a variable or function name.
16484  * Does not include '{' or '}' for magic braces.
16485  */
16486     static int
16487 eval_isnamec(c)
16488     int	    c;
16489 {
16490     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
16491 }
16492 
16493 /*
16494  * Return TRUE if character "c" can be used as the first character in a
16495  * variable or function name (excluding '{' and '}').
16496  */
16497     static int
16498 eval_isnamec1(c)
16499     int	    c;
16500 {
16501     return (ASCII_ISALPHA(c) || c == '_');
16502 }
16503 
16504 /*
16505  * Set number v: variable to "val".
16506  */
16507     void
16508 set_vim_var_nr(idx, val)
16509     int		idx;
16510     long	val;
16511 {
16512     vimvars[idx].vv_nr = val;
16513 }
16514 
16515 /*
16516  * Get number v: variable value.
16517  */
16518     long
16519 get_vim_var_nr(idx)
16520     int		idx;
16521 {
16522     return vimvars[idx].vv_nr;
16523 }
16524 
16525 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16526 /*
16527  * Get string v: variable value.  Uses a static buffer, can only be used once.
16528  */
16529     char_u *
16530 get_vim_var_str(idx)
16531     int		idx;
16532 {
16533     return get_tv_string(&vimvars[idx].vv_tv);
16534 }
16535 #endif
16536 
16537 /*
16538  * Set v:count, v:count1 and v:prevcount.
16539  */
16540     void
16541 set_vcount(count, count1)
16542     long	count;
16543     long	count1;
16544 {
16545     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
16546     vimvars[VV_COUNT].vv_nr = count;
16547     vimvars[VV_COUNT1].vv_nr = count1;
16548 }
16549 
16550 /*
16551  * Set string v: variable to a copy of "val".
16552  */
16553     void
16554 set_vim_var_string(idx, val, len)
16555     int		idx;
16556     char_u	*val;
16557     int		len;	    /* length of "val" to use or -1 (whole string) */
16558 {
16559     /* Need to do this (at least) once, since we can't initialize a union.
16560      * Will always be invoked when "v:progname" is set. */
16561     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
16562 
16563     vim_free(vimvars[idx].vv_str);
16564     if (val == NULL)
16565 	vimvars[idx].vv_str = NULL;
16566     else if (len == -1)
16567 	vimvars[idx].vv_str = vim_strsave(val);
16568     else
16569 	vimvars[idx].vv_str = vim_strnsave(val, len);
16570 }
16571 
16572 /*
16573  * Set v:register if needed.
16574  */
16575     void
16576 set_reg_var(c)
16577     int		c;
16578 {
16579     char_u	regname;
16580 
16581     if (c == 0 || c == ' ')
16582 	regname = '"';
16583     else
16584 	regname = c;
16585     /* Avoid free/alloc when the value is already right. */
16586     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
16587 	set_vim_var_string(VV_REG, &regname, 1);
16588 }
16589 
16590 /*
16591  * Get or set v:exception.  If "oldval" == NULL, return the current value.
16592  * Otherwise, restore the value to "oldval" and return NULL.
16593  * Must always be called in pairs to save and restore v:exception!  Does not
16594  * take care of memory allocations.
16595  */
16596     char_u *
16597 v_exception(oldval)
16598     char_u	*oldval;
16599 {
16600     if (oldval == NULL)
16601 	return vimvars[VV_EXCEPTION].vv_str;
16602 
16603     vimvars[VV_EXCEPTION].vv_str = oldval;
16604     return NULL;
16605 }
16606 
16607 /*
16608  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
16609  * Otherwise, restore the value to "oldval" and return NULL.
16610  * Must always be called in pairs to save and restore v:throwpoint!  Does not
16611  * take care of memory allocations.
16612  */
16613     char_u *
16614 v_throwpoint(oldval)
16615     char_u	*oldval;
16616 {
16617     if (oldval == NULL)
16618 	return vimvars[VV_THROWPOINT].vv_str;
16619 
16620     vimvars[VV_THROWPOINT].vv_str = oldval;
16621     return NULL;
16622 }
16623 
16624 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16625 /*
16626  * Set v:cmdarg.
16627  * If "eap" != NULL, use "eap" to generate the value and return the old value.
16628  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
16629  * Must always be called in pairs!
16630  */
16631     char_u *
16632 set_cmdarg(eap, oldarg)
16633     exarg_T	*eap;
16634     char_u	*oldarg;
16635 {
16636     char_u	*oldval;
16637     char_u	*newval;
16638     unsigned	len;
16639 
16640     oldval = vimvars[VV_CMDARG].vv_str;
16641     if (eap == NULL)
16642     {
16643 	vim_free(oldval);
16644 	vimvars[VV_CMDARG].vv_str = oldarg;
16645 	return NULL;
16646     }
16647 
16648     if (eap->force_bin == FORCE_BIN)
16649 	len = 6;
16650     else if (eap->force_bin == FORCE_NOBIN)
16651 	len = 8;
16652     else
16653 	len = 0;
16654     if (eap->force_ff != 0)
16655 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
16656 # ifdef FEAT_MBYTE
16657     if (eap->force_enc != 0)
16658 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
16659     if (eap->bad_char != 0)
16660 	len += (unsigned)STRLEN(eap->cmd + eap->bad_char) + 7;
16661 # endif
16662 
16663     newval = alloc(len + 1);
16664     if (newval == NULL)
16665 	return NULL;
16666 
16667     if (eap->force_bin == FORCE_BIN)
16668 	sprintf((char *)newval, " ++bin");
16669     else if (eap->force_bin == FORCE_NOBIN)
16670 	sprintf((char *)newval, " ++nobin");
16671     else
16672 	*newval = NUL;
16673     if (eap->force_ff != 0)
16674 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
16675 						eap->cmd + eap->force_ff);
16676 # ifdef FEAT_MBYTE
16677     if (eap->force_enc != 0)
16678 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
16679 					       eap->cmd + eap->force_enc);
16680     if (eap->bad_char != 0)
16681 	sprintf((char *)newval + STRLEN(newval), " ++bad=%s",
16682 					       eap->cmd + eap->bad_char);
16683 # endif
16684     vimvars[VV_CMDARG].vv_str = newval;
16685     return oldval;
16686 }
16687 #endif
16688 
16689 /*
16690  * Get the value of internal variable "name".
16691  * Return OK or FAIL.
16692  */
16693     static int
16694 get_var_tv(name, len, rettv, verbose)
16695     char_u	*name;
16696     int		len;		/* length of "name" */
16697     typval_T	*rettv;		/* NULL when only checking existence */
16698     int		verbose;	/* may give error message */
16699 {
16700     int		ret = OK;
16701     typval_T	*tv = NULL;
16702     typval_T	atv;
16703     dictitem_T	*v;
16704     int		cc;
16705 
16706     /* truncate the name, so that we can use strcmp() */
16707     cc = name[len];
16708     name[len] = NUL;
16709 
16710     /*
16711      * Check for "b:changedtick".
16712      */
16713     if (STRCMP(name, "b:changedtick") == 0)
16714     {
16715 	atv.v_type = VAR_NUMBER;
16716 	atv.vval.v_number = curbuf->b_changedtick;
16717 	tv = &atv;
16718     }
16719 
16720     /*
16721      * Check for user-defined variables.
16722      */
16723     else
16724     {
16725 	v = find_var(name, NULL);
16726 	if (v != NULL)
16727 	    tv = &v->di_tv;
16728     }
16729 
16730     if (tv == NULL)
16731     {
16732 	if (rettv != NULL && verbose)
16733 	    EMSG2(_(e_undefvar), name);
16734 	ret = FAIL;
16735     }
16736     else if (rettv != NULL)
16737 	copy_tv(tv, rettv);
16738 
16739     name[len] = cc;
16740 
16741     return ret;
16742 }
16743 
16744 /*
16745  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
16746  * Also handle function call with Funcref variable: func(expr)
16747  * Can all be combined: dict.func(expr)[idx]['func'](expr)
16748  */
16749     static int
16750 handle_subscript(arg, rettv, evaluate, verbose)
16751     char_u	**arg;
16752     typval_T	*rettv;
16753     int		evaluate;	/* do more than finding the end */
16754     int		verbose;	/* give error messages */
16755 {
16756     int		ret = OK;
16757     dict_T	*selfdict = NULL;
16758     char_u	*s;
16759     int		len;
16760     typval_T	functv;
16761 
16762     while (ret == OK
16763 	    && (**arg == '['
16764 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
16765 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
16766 	    && !vim_iswhite(*(*arg - 1)))
16767     {
16768 	if (**arg == '(')
16769 	{
16770 	    /* need to copy the funcref so that we can clear rettv */
16771 	    functv = *rettv;
16772 	    rettv->v_type = VAR_UNKNOWN;
16773 
16774 	    /* Invoke the function.  Recursive! */
16775 	    s = functv.vval.v_string;
16776 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
16777 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
16778 			&len, evaluate, selfdict);
16779 
16780 	    /* Clear the funcref afterwards, so that deleting it while
16781 	     * evaluating the arguments is possible (see test55). */
16782 	    clear_tv(&functv);
16783 
16784 	    /* Stop the expression evaluation when immediately aborting on
16785 	     * error, or when an interrupt occurred or an exception was thrown
16786 	     * but not caught. */
16787 	    if (aborting())
16788 	    {
16789 		if (ret == OK)
16790 		    clear_tv(rettv);
16791 		ret = FAIL;
16792 	    }
16793 	    dict_unref(selfdict);
16794 	    selfdict = NULL;
16795 	}
16796 	else /* **arg == '[' || **arg == '.' */
16797 	{
16798 	    dict_unref(selfdict);
16799 	    if (rettv->v_type == VAR_DICT)
16800 	    {
16801 		selfdict = rettv->vval.v_dict;
16802 		if (selfdict != NULL)
16803 		    ++selfdict->dv_refcount;
16804 	    }
16805 	    else
16806 		selfdict = NULL;
16807 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
16808 	    {
16809 		clear_tv(rettv);
16810 		ret = FAIL;
16811 	    }
16812 	}
16813     }
16814     dict_unref(selfdict);
16815     return ret;
16816 }
16817 
16818 /*
16819  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
16820  * value).
16821  */
16822     static typval_T *
16823 alloc_tv()
16824 {
16825     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
16826 }
16827 
16828 /*
16829  * Allocate memory for a variable type-value, and assign a string to it.
16830  * The string "s" must have been allocated, it is consumed.
16831  * Return NULL for out of memory, the variable otherwise.
16832  */
16833     static typval_T *
16834 alloc_string_tv(s)
16835     char_u	*s;
16836 {
16837     typval_T	*rettv;
16838 
16839     rettv = alloc_tv();
16840     if (rettv != NULL)
16841     {
16842 	rettv->v_type = VAR_STRING;
16843 	rettv->vval.v_string = s;
16844     }
16845     else
16846 	vim_free(s);
16847     return rettv;
16848 }
16849 
16850 /*
16851  * Free the memory for a variable type-value.
16852  */
16853     void
16854 free_tv(varp)
16855     typval_T *varp;
16856 {
16857     if (varp != NULL)
16858     {
16859 	switch (varp->v_type)
16860 	{
16861 	    case VAR_FUNC:
16862 		func_unref(varp->vval.v_string);
16863 		/*FALLTHROUGH*/
16864 	    case VAR_STRING:
16865 		vim_free(varp->vval.v_string);
16866 		break;
16867 	    case VAR_LIST:
16868 		list_unref(varp->vval.v_list);
16869 		break;
16870 	    case VAR_DICT:
16871 		dict_unref(varp->vval.v_dict);
16872 		break;
16873 	    case VAR_NUMBER:
16874 	    case VAR_UNKNOWN:
16875 		break;
16876 	    default:
16877 		EMSG2(_(e_intern2), "free_tv()");
16878 		break;
16879 	}
16880 	vim_free(varp);
16881     }
16882 }
16883 
16884 /*
16885  * Free the memory for a variable value and set the value to NULL or 0.
16886  */
16887     void
16888 clear_tv(varp)
16889     typval_T *varp;
16890 {
16891     if (varp != NULL)
16892     {
16893 	switch (varp->v_type)
16894 	{
16895 	    case VAR_FUNC:
16896 		func_unref(varp->vval.v_string);
16897 		/*FALLTHROUGH*/
16898 	    case VAR_STRING:
16899 		vim_free(varp->vval.v_string);
16900 		varp->vval.v_string = NULL;
16901 		break;
16902 	    case VAR_LIST:
16903 		list_unref(varp->vval.v_list);
16904 		varp->vval.v_list = NULL;
16905 		break;
16906 	    case VAR_DICT:
16907 		dict_unref(varp->vval.v_dict);
16908 		varp->vval.v_dict = NULL;
16909 		break;
16910 	    case VAR_NUMBER:
16911 		varp->vval.v_number = 0;
16912 		break;
16913 	    case VAR_UNKNOWN:
16914 		break;
16915 	    default:
16916 		EMSG2(_(e_intern2), "clear_tv()");
16917 	}
16918 	varp->v_lock = 0;
16919     }
16920 }
16921 
16922 /*
16923  * Set the value of a variable to NULL without freeing items.
16924  */
16925     static void
16926 init_tv(varp)
16927     typval_T *varp;
16928 {
16929     if (varp != NULL)
16930 	vim_memset(varp, 0, sizeof(typval_T));
16931 }
16932 
16933 /*
16934  * Get the number value of a variable.
16935  * If it is a String variable, uses vim_str2nr().
16936  * For incompatible types, return 0.
16937  * get_tv_number_chk() is similar to get_tv_number(), but informs the
16938  * caller of incompatible types: it sets *denote to TRUE if "denote"
16939  * is not NULL or returns -1 otherwise.
16940  */
16941     static long
16942 get_tv_number(varp)
16943     typval_T	*varp;
16944 {
16945     int		error = FALSE;
16946 
16947     return get_tv_number_chk(varp, &error);	/* return 0L on error */
16948 }
16949 
16950     long
16951 get_tv_number_chk(varp, denote)
16952     typval_T	*varp;
16953     int		*denote;
16954 {
16955     long	n = 0L;
16956 
16957     switch (varp->v_type)
16958     {
16959 	case VAR_NUMBER:
16960 	    return (long)(varp->vval.v_number);
16961 	case VAR_FUNC:
16962 	    EMSG(_("E703: Using a Funcref as a number"));
16963 	    break;
16964 	case VAR_STRING:
16965 	    if (varp->vval.v_string != NULL)
16966 		vim_str2nr(varp->vval.v_string, NULL, NULL,
16967 							TRUE, TRUE, &n, NULL);
16968 	    return n;
16969 	case VAR_LIST:
16970 	    EMSG(_("E745: Using a List as a number"));
16971 	    break;
16972 	case VAR_DICT:
16973 	    EMSG(_("E728: Using a Dictionary as a number"));
16974 	    break;
16975 	default:
16976 	    EMSG2(_(e_intern2), "get_tv_number()");
16977 	    break;
16978     }
16979     if (denote == NULL)		/* useful for values that must be unsigned */
16980 	n = -1;
16981     else
16982 	*denote = TRUE;
16983     return n;
16984 }
16985 
16986 /*
16987  * Get the lnum from the first argument.
16988  * Also accepts ".", "$", etc., but that only works for the current buffer.
16989  * Returns -1 on error.
16990  */
16991     static linenr_T
16992 get_tv_lnum(argvars)
16993     typval_T	*argvars;
16994 {
16995     typval_T	rettv;
16996     linenr_T	lnum;
16997 
16998     lnum = get_tv_number_chk(&argvars[0], NULL);
16999     if (lnum == 0)  /* no valid number, try using line() */
17000     {
17001 	rettv.v_type = VAR_NUMBER;
17002 	f_line(argvars, &rettv);
17003 	lnum = rettv.vval.v_number;
17004 	clear_tv(&rettv);
17005     }
17006     return lnum;
17007 }
17008 
17009 /*
17010  * Get the lnum from the first argument.
17011  * Also accepts "$", then "buf" is used.
17012  * Returns 0 on error.
17013  */
17014     static linenr_T
17015 get_tv_lnum_buf(argvars, buf)
17016     typval_T	*argvars;
17017     buf_T	*buf;
17018 {
17019     if (argvars[0].v_type == VAR_STRING
17020 	    && argvars[0].vval.v_string != NULL
17021 	    && argvars[0].vval.v_string[0] == '$'
17022 	    && buf != NULL)
17023 	return buf->b_ml.ml_line_count;
17024     return get_tv_number_chk(&argvars[0], NULL);
17025 }
17026 
17027 /*
17028  * Get the string value of a variable.
17029  * If it is a Number variable, the number is converted into a string.
17030  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
17031  * get_tv_string_buf() uses a given buffer.
17032  * If the String variable has never been set, return an empty string.
17033  * Never returns NULL;
17034  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
17035  * NULL on error.
17036  */
17037     static char_u *
17038 get_tv_string(varp)
17039     typval_T	*varp;
17040 {
17041     static char_u   mybuf[NUMBUFLEN];
17042 
17043     return get_tv_string_buf(varp, mybuf);
17044 }
17045 
17046     static char_u *
17047 get_tv_string_buf(varp, buf)
17048     typval_T	*varp;
17049     char_u	*buf;
17050 {
17051     char_u	*res =  get_tv_string_buf_chk(varp, buf);
17052 
17053     return res != NULL ? res : (char_u *)"";
17054 }
17055 
17056     char_u *
17057 get_tv_string_chk(varp)
17058     typval_T	*varp;
17059 {
17060     static char_u   mybuf[NUMBUFLEN];
17061 
17062     return get_tv_string_buf_chk(varp, mybuf);
17063 }
17064 
17065     static char_u *
17066 get_tv_string_buf_chk(varp, buf)
17067     typval_T	*varp;
17068     char_u	*buf;
17069 {
17070     switch (varp->v_type)
17071     {
17072 	case VAR_NUMBER:
17073 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
17074 	    return buf;
17075 	case VAR_FUNC:
17076 	    EMSG(_("E729: using Funcref as a String"));
17077 	    break;
17078 	case VAR_LIST:
17079 	    EMSG(_("E730: using List as a String"));
17080 	    break;
17081 	case VAR_DICT:
17082 	    EMSG(_("E731: using Dictionary as a String"));
17083 	    break;
17084 	case VAR_STRING:
17085 	    if (varp->vval.v_string != NULL)
17086 		return varp->vval.v_string;
17087 	    return (char_u *)"";
17088 	default:
17089 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
17090 	    break;
17091     }
17092     return NULL;
17093 }
17094 
17095 /*
17096  * Find variable "name" in the list of variables.
17097  * Return a pointer to it if found, NULL if not found.
17098  * Careful: "a:0" variables don't have a name.
17099  * When "htp" is not NULL we are writing to the variable, set "htp" to the
17100  * hashtab_T used.
17101  */
17102     static dictitem_T *
17103 find_var(name, htp)
17104     char_u	*name;
17105     hashtab_T	**htp;
17106 {
17107     char_u	*varname;
17108     hashtab_T	*ht;
17109 
17110     ht = find_var_ht(name, &varname);
17111     if (htp != NULL)
17112 	*htp = ht;
17113     if (ht == NULL)
17114 	return NULL;
17115     return find_var_in_ht(ht, varname, htp != NULL);
17116 }
17117 
17118 /*
17119  * Find variable "varname" in hashtab "ht".
17120  * Returns NULL if not found.
17121  */
17122     static dictitem_T *
17123 find_var_in_ht(ht, varname, writing)
17124     hashtab_T	*ht;
17125     char_u	*varname;
17126     int		writing;
17127 {
17128     hashitem_T	*hi;
17129 
17130     if (*varname == NUL)
17131     {
17132 	/* Must be something like "s:", otherwise "ht" would be NULL. */
17133 	switch (varname[-2])
17134 	{
17135 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
17136 	    case 'g': return &globvars_var;
17137 	    case 'v': return &vimvars_var;
17138 	    case 'b': return &curbuf->b_bufvar;
17139 	    case 'w': return &curwin->w_winvar;
17140 	    case 'l': return current_funccal == NULL
17141 					? NULL : &current_funccal->l_vars_var;
17142 	    case 'a': return current_funccal == NULL
17143 				       ? NULL : &current_funccal->l_avars_var;
17144 	}
17145 	return NULL;
17146     }
17147 
17148     hi = hash_find(ht, varname);
17149     if (HASHITEM_EMPTY(hi))
17150     {
17151 	/* For global variables we may try auto-loading the script.  If it
17152 	 * worked find the variable again.  Don't auto-load a script if it was
17153 	 * loaded already, otherwise it would be loaded every time when
17154 	 * checking if a function name is a Funcref variable. */
17155 	if (ht == &globvarht && !writing
17156 			    && script_autoload(varname, FALSE) && !aborting())
17157 	    hi = hash_find(ht, varname);
17158 	if (HASHITEM_EMPTY(hi))
17159 	    return NULL;
17160     }
17161     return HI2DI(hi);
17162 }
17163 
17164 /*
17165  * Find the hashtab used for a variable name.
17166  * Set "varname" to the start of name without ':'.
17167  */
17168     static hashtab_T *
17169 find_var_ht(name, varname)
17170     char_u  *name;
17171     char_u  **varname;
17172 {
17173     hashitem_T	*hi;
17174 
17175     if (name[1] != ':')
17176     {
17177 	/* The name must not start with a colon or #. */
17178 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
17179 	    return NULL;
17180 	*varname = name;
17181 
17182 	/* "version" is "v:version" in all scopes */
17183 	hi = hash_find(&compat_hashtab, name);
17184 	if (!HASHITEM_EMPTY(hi))
17185 	    return &compat_hashtab;
17186 
17187 	if (current_funccal == NULL)
17188 	    return &globvarht;			/* global variable */
17189 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
17190     }
17191     *varname = name + 2;
17192     if (*name == 'g')				/* global variable */
17193 	return &globvarht;
17194     /* There must be no ':' or '#' in the rest of the name, unless g: is used
17195      */
17196     if (vim_strchr(name + 2, ':') != NULL
17197 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
17198 	return NULL;
17199     if (*name == 'b')				/* buffer variable */
17200 	return &curbuf->b_vars.dv_hashtab;
17201     if (*name == 'w')				/* window variable */
17202 	return &curwin->w_vars.dv_hashtab;
17203     if (*name == 'v')				/* v: variable */
17204 	return &vimvarht;
17205     if (*name == 'a' && current_funccal != NULL) /* function argument */
17206 	return &current_funccal->l_avars.dv_hashtab;
17207     if (*name == 'l' && current_funccal != NULL) /* local function variable */
17208 	return &current_funccal->l_vars.dv_hashtab;
17209     if (*name == 's'				/* script variable */
17210 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
17211 	return &SCRIPT_VARS(current_SID);
17212     return NULL;
17213 }
17214 
17215 /*
17216  * Get the string value of a (global/local) variable.
17217  * Returns NULL when it doesn't exist.
17218  */
17219     char_u *
17220 get_var_value(name)
17221     char_u	*name;
17222 {
17223     dictitem_T	*v;
17224 
17225     v = find_var(name, NULL);
17226     if (v == NULL)
17227 	return NULL;
17228     return get_tv_string(&v->di_tv);
17229 }
17230 
17231 /*
17232  * Allocate a new hashtab for a sourced script.  It will be used while
17233  * sourcing this script and when executing functions defined in the script.
17234  */
17235     void
17236 new_script_vars(id)
17237     scid_T id;
17238 {
17239     int		i;
17240     hashtab_T	*ht;
17241     scriptvar_T *sv;
17242 
17243     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
17244     {
17245 	/* Re-allocating ga_data means that an ht_array pointing to
17246 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
17247 	 * at its init value.  Also reset "v_dict", it's always the same. */
17248 	for (i = 1; i <= ga_scripts.ga_len; ++i)
17249 	{
17250 	    ht = &SCRIPT_VARS(i);
17251 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
17252 		ht->ht_array = ht->ht_smallarray;
17253 	    sv = &SCRIPT_SV(i);
17254 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
17255 	}
17256 
17257 	while (ga_scripts.ga_len < id)
17258 	{
17259 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
17260 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
17261 	    ++ga_scripts.ga_len;
17262 	}
17263     }
17264 }
17265 
17266 /*
17267  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
17268  * point to it.
17269  */
17270     void
17271 init_var_dict(dict, dict_var)
17272     dict_T	*dict;
17273     dictitem_T	*dict_var;
17274 {
17275     hash_init(&dict->dv_hashtab);
17276     dict->dv_refcount = 99999;
17277     dict_var->di_tv.vval.v_dict = dict;
17278     dict_var->di_tv.v_type = VAR_DICT;
17279     dict_var->di_tv.v_lock = VAR_FIXED;
17280     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
17281     dict_var->di_key[0] = NUL;
17282 }
17283 
17284 /*
17285  * Clean up a list of internal variables.
17286  * Frees all allocated variables and the value they contain.
17287  * Clears hashtab "ht", does not free it.
17288  */
17289     void
17290 vars_clear(ht)
17291     hashtab_T *ht;
17292 {
17293     vars_clear_ext(ht, TRUE);
17294 }
17295 
17296 /*
17297  * Like vars_clear(), but only free the value if "free_val" is TRUE.
17298  */
17299     static void
17300 vars_clear_ext(ht, free_val)
17301     hashtab_T	*ht;
17302     int		free_val;
17303 {
17304     int		todo;
17305     hashitem_T	*hi;
17306     dictitem_T	*v;
17307 
17308     hash_lock(ht);
17309     todo = ht->ht_used;
17310     for (hi = ht->ht_array; todo > 0; ++hi)
17311     {
17312 	if (!HASHITEM_EMPTY(hi))
17313 	{
17314 	    --todo;
17315 
17316 	    /* Free the variable.  Don't remove it from the hashtab,
17317 	     * ht_array might change then.  hash_clear() takes care of it
17318 	     * later. */
17319 	    v = HI2DI(hi);
17320 	    if (free_val)
17321 		clear_tv(&v->di_tv);
17322 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
17323 		vim_free(v);
17324 	}
17325     }
17326     hash_clear(ht);
17327     ht->ht_used = 0;
17328 }
17329 
17330 /*
17331  * Delete a variable from hashtab "ht" at item "hi".
17332  * Clear the variable value and free the dictitem.
17333  */
17334     static void
17335 delete_var(ht, hi)
17336     hashtab_T	*ht;
17337     hashitem_T	*hi;
17338 {
17339     dictitem_T	*di = HI2DI(hi);
17340 
17341     hash_remove(ht, hi);
17342     clear_tv(&di->di_tv);
17343     vim_free(di);
17344 }
17345 
17346 /*
17347  * List the value of one internal variable.
17348  */
17349     static void
17350 list_one_var(v, prefix)
17351     dictitem_T	*v;
17352     char_u	*prefix;
17353 {
17354     char_u	*tofree;
17355     char_u	*s;
17356     char_u	numbuf[NUMBUFLEN];
17357 
17358     s = echo_string(&v->di_tv, &tofree, numbuf, ++current_copyID);
17359     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
17360 						s == NULL ? (char_u *)"" : s);
17361     vim_free(tofree);
17362 }
17363 
17364     static void
17365 list_one_var_a(prefix, name, type, string)
17366     char_u	*prefix;
17367     char_u	*name;
17368     int		type;
17369     char_u	*string;
17370 {
17371     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
17372     if (name != NULL)	/* "a:" vars don't have a name stored */
17373 	msg_puts(name);
17374     msg_putchar(' ');
17375     msg_advance(22);
17376     if (type == VAR_NUMBER)
17377 	msg_putchar('#');
17378     else if (type == VAR_FUNC)
17379 	msg_putchar('*');
17380     else if (type == VAR_LIST)
17381     {
17382 	msg_putchar('[');
17383 	if (*string == '[')
17384 	    ++string;
17385     }
17386     else if (type == VAR_DICT)
17387     {
17388 	msg_putchar('{');
17389 	if (*string == '{')
17390 	    ++string;
17391     }
17392     else
17393 	msg_putchar(' ');
17394 
17395     msg_outtrans(string);
17396 
17397     if (type == VAR_FUNC)
17398 	msg_puts((char_u *)"()");
17399 }
17400 
17401 /*
17402  * Set variable "name" to value in "tv".
17403  * If the variable already exists, the value is updated.
17404  * Otherwise the variable is created.
17405  */
17406     static void
17407 set_var(name, tv, copy)
17408     char_u	*name;
17409     typval_T	*tv;
17410     int		copy;	    /* make copy of value in "tv" */
17411 {
17412     dictitem_T	*v;
17413     char_u	*varname;
17414     hashtab_T	*ht;
17415     char_u	*p;
17416 
17417     if (tv->v_type == VAR_FUNC)
17418     {
17419 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
17420 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
17421 							 ? name[2] : name[0]))
17422 	{
17423 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
17424 	    return;
17425 	}
17426 	if (function_exists(name))
17427 	{
17428 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
17429 									name);
17430 	    return;
17431 	}
17432     }
17433 
17434     ht = find_var_ht(name, &varname);
17435     if (ht == NULL || *varname == NUL)
17436     {
17437 	EMSG2(_(e_illvar), name);
17438 	return;
17439     }
17440 
17441     v = find_var_in_ht(ht, varname, TRUE);
17442     if (v != NULL)
17443     {
17444 	/* existing variable, need to clear the value */
17445 	if (var_check_ro(v->di_flags, name)
17446 				      || tv_check_lock(v->di_tv.v_lock, name))
17447 	    return;
17448 	if (v->di_tv.v_type != tv->v_type
17449 		&& !((v->di_tv.v_type == VAR_STRING
17450 			|| v->di_tv.v_type == VAR_NUMBER)
17451 		    && (tv->v_type == VAR_STRING
17452 			|| tv->v_type == VAR_NUMBER)))
17453 	{
17454 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
17455 	    return;
17456 	}
17457 
17458 	/*
17459 	 * Handle setting internal v: variables separately: we don't change
17460 	 * the type.
17461 	 */
17462 	if (ht == &vimvarht)
17463 	{
17464 	    if (v->di_tv.v_type == VAR_STRING)
17465 	    {
17466 		vim_free(v->di_tv.vval.v_string);
17467 		if (copy || tv->v_type != VAR_STRING)
17468 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
17469 		else
17470 		{
17471 		    /* Take over the string to avoid an extra alloc/free. */
17472 		    v->di_tv.vval.v_string = tv->vval.v_string;
17473 		    tv->vval.v_string = NULL;
17474 		}
17475 	    }
17476 	    else if (v->di_tv.v_type != VAR_NUMBER)
17477 		EMSG2(_(e_intern2), "set_var()");
17478 	    else
17479 		v->di_tv.vval.v_number = get_tv_number(tv);
17480 	    return;
17481 	}
17482 
17483 	clear_tv(&v->di_tv);
17484     }
17485     else		    /* add a new variable */
17486     {
17487 	/* Make sure the variable name is valid. */
17488 	for (p = varname; *p != NUL; ++p)
17489 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
17490 						       && *p != AUTOLOAD_CHAR)
17491 	    {
17492 		EMSG2(_(e_illvar), varname);
17493 		return;
17494 	    }
17495 
17496 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
17497 							  + STRLEN(varname)));
17498 	if (v == NULL)
17499 	    return;
17500 	STRCPY(v->di_key, varname);
17501 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
17502 	{
17503 	    vim_free(v);
17504 	    return;
17505 	}
17506 	v->di_flags = 0;
17507     }
17508 
17509     if (copy || tv->v_type == VAR_NUMBER)
17510 	copy_tv(tv, &v->di_tv);
17511     else
17512     {
17513 	v->di_tv = *tv;
17514 	v->di_tv.v_lock = 0;
17515 	init_tv(tv);
17516     }
17517 }
17518 
17519 /*
17520  * Return TRUE if di_flags "flags" indicate read-only variable "name".
17521  * Also give an error message.
17522  */
17523     static int
17524 var_check_ro(flags, name)
17525     int		flags;
17526     char_u	*name;
17527 {
17528     if (flags & DI_FLAGS_RO)
17529     {
17530 	EMSG2(_(e_readonlyvar), name);
17531 	return TRUE;
17532     }
17533     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
17534     {
17535 	EMSG2(_(e_readonlysbx), name);
17536 	return TRUE;
17537     }
17538     return FALSE;
17539 }
17540 
17541 /*
17542  * Return TRUE if typeval "tv" is set to be locked (immutable).
17543  * Also give an error message, using "name".
17544  */
17545     static int
17546 tv_check_lock(lock, name)
17547     int		lock;
17548     char_u	*name;
17549 {
17550     if (lock & VAR_LOCKED)
17551     {
17552 	EMSG2(_("E741: Value is locked: %s"),
17553 				name == NULL ? (char_u *)_("Unknown") : name);
17554 	return TRUE;
17555     }
17556     if (lock & VAR_FIXED)
17557     {
17558 	EMSG2(_("E742: Cannot change value of %s"),
17559 				name == NULL ? (char_u *)_("Unknown") : name);
17560 	return TRUE;
17561     }
17562     return FALSE;
17563 }
17564 
17565 /*
17566  * Copy the values from typval_T "from" to typval_T "to".
17567  * When needed allocates string or increases reference count.
17568  * Does not make a copy of a list or dict but copies the reference!
17569  */
17570     static void
17571 copy_tv(from, to)
17572     typval_T *from;
17573     typval_T *to;
17574 {
17575     to->v_type = from->v_type;
17576     to->v_lock = 0;
17577     switch (from->v_type)
17578     {
17579 	case VAR_NUMBER:
17580 	    to->vval.v_number = from->vval.v_number;
17581 	    break;
17582 	case VAR_STRING:
17583 	case VAR_FUNC:
17584 	    if (from->vval.v_string == NULL)
17585 		to->vval.v_string = NULL;
17586 	    else
17587 	    {
17588 		to->vval.v_string = vim_strsave(from->vval.v_string);
17589 		if (from->v_type == VAR_FUNC)
17590 		    func_ref(to->vval.v_string);
17591 	    }
17592 	    break;
17593 	case VAR_LIST:
17594 	    if (from->vval.v_list == NULL)
17595 		to->vval.v_list = NULL;
17596 	    else
17597 	    {
17598 		to->vval.v_list = from->vval.v_list;
17599 		++to->vval.v_list->lv_refcount;
17600 	    }
17601 	    break;
17602 	case VAR_DICT:
17603 	    if (from->vval.v_dict == NULL)
17604 		to->vval.v_dict = NULL;
17605 	    else
17606 	    {
17607 		to->vval.v_dict = from->vval.v_dict;
17608 		++to->vval.v_dict->dv_refcount;
17609 	    }
17610 	    break;
17611 	default:
17612 	    EMSG2(_(e_intern2), "copy_tv()");
17613 	    break;
17614     }
17615 }
17616 
17617 /*
17618  * Make a copy of an item.
17619  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
17620  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
17621  * reference to an already copied list/dict can be used.
17622  * Returns FAIL or OK.
17623  */
17624     static int
17625 item_copy(from, to, deep, copyID)
17626     typval_T	*from;
17627     typval_T	*to;
17628     int		deep;
17629     int		copyID;
17630 {
17631     static int	recurse = 0;
17632     int		ret = OK;
17633 
17634     if (recurse >= DICT_MAXNEST)
17635     {
17636 	EMSG(_("E698: variable nested too deep for making a copy"));
17637 	return FAIL;
17638     }
17639     ++recurse;
17640 
17641     switch (from->v_type)
17642     {
17643 	case VAR_NUMBER:
17644 	case VAR_STRING:
17645 	case VAR_FUNC:
17646 	    copy_tv(from, to);
17647 	    break;
17648 	case VAR_LIST:
17649 	    to->v_type = VAR_LIST;
17650 	    to->v_lock = 0;
17651 	    if (from->vval.v_list == NULL)
17652 		to->vval.v_list = NULL;
17653 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
17654 	    {
17655 		/* use the copy made earlier */
17656 		to->vval.v_list = from->vval.v_list->lv_copylist;
17657 		++to->vval.v_list->lv_refcount;
17658 	    }
17659 	    else
17660 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
17661 	    if (to->vval.v_list == NULL)
17662 		ret = FAIL;
17663 	    break;
17664 	case VAR_DICT:
17665 	    to->v_type = VAR_DICT;
17666 	    to->v_lock = 0;
17667 	    if (from->vval.v_dict == NULL)
17668 		to->vval.v_dict = NULL;
17669 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
17670 	    {
17671 		/* use the copy made earlier */
17672 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
17673 		++to->vval.v_dict->dv_refcount;
17674 	    }
17675 	    else
17676 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
17677 	    if (to->vval.v_dict == NULL)
17678 		ret = FAIL;
17679 	    break;
17680 	default:
17681 	    EMSG2(_(e_intern2), "item_copy()");
17682 	    ret = FAIL;
17683     }
17684     --recurse;
17685     return ret;
17686 }
17687 
17688 /*
17689  * ":echo expr1 ..."	print each argument separated with a space, add a
17690  *			newline at the end.
17691  * ":echon expr1 ..."	print each argument plain.
17692  */
17693     void
17694 ex_echo(eap)
17695     exarg_T	*eap;
17696 {
17697     char_u	*arg = eap->arg;
17698     typval_T	rettv;
17699     char_u	*tofree;
17700     char_u	*p;
17701     int		needclr = TRUE;
17702     int		atstart = TRUE;
17703     char_u	numbuf[NUMBUFLEN];
17704 
17705     if (eap->skip)
17706 	++emsg_skip;
17707     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
17708     {
17709 	p = arg;
17710 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
17711 	{
17712 	    /*
17713 	     * Report the invalid expression unless the expression evaluation
17714 	     * has been cancelled due to an aborting error, an interrupt, or an
17715 	     * exception.
17716 	     */
17717 	    if (!aborting())
17718 		EMSG2(_(e_invexpr2), p);
17719 	    break;
17720 	}
17721 	if (!eap->skip)
17722 	{
17723 	    if (atstart)
17724 	    {
17725 		atstart = FALSE;
17726 		/* Call msg_start() after eval1(), evaluating the expression
17727 		 * may cause a message to appear. */
17728 		if (eap->cmdidx == CMD_echo)
17729 		    msg_start();
17730 	    }
17731 	    else if (eap->cmdidx == CMD_echo)
17732 		msg_puts_attr((char_u *)" ", echo_attr);
17733 	    p = echo_string(&rettv, &tofree, numbuf, ++current_copyID);
17734 	    if (p != NULL)
17735 		for ( ; *p != NUL && !got_int; ++p)
17736 		{
17737 		    if (*p == '\n' || *p == '\r' || *p == TAB)
17738 		    {
17739 			if (*p != TAB && needclr)
17740 			{
17741 			    /* remove any text still there from the command */
17742 			    msg_clr_eos();
17743 			    needclr = FALSE;
17744 			}
17745 			msg_putchar_attr(*p, echo_attr);
17746 		    }
17747 		    else
17748 		    {
17749 #ifdef FEAT_MBYTE
17750 			if (has_mbyte)
17751 			{
17752 			    int i = (*mb_ptr2len)(p);
17753 
17754 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
17755 			    p += i - 1;
17756 			}
17757 			else
17758 #endif
17759 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
17760 		    }
17761 		}
17762 	    vim_free(tofree);
17763 	}
17764 	clear_tv(&rettv);
17765 	arg = skipwhite(arg);
17766     }
17767     eap->nextcmd = check_nextcmd(arg);
17768 
17769     if (eap->skip)
17770 	--emsg_skip;
17771     else
17772     {
17773 	/* remove text that may still be there from the command */
17774 	if (needclr)
17775 	    msg_clr_eos();
17776 	if (eap->cmdidx == CMD_echo)
17777 	    msg_end();
17778     }
17779 }
17780 
17781 /*
17782  * ":echohl {name}".
17783  */
17784     void
17785 ex_echohl(eap)
17786     exarg_T	*eap;
17787 {
17788     int		id;
17789 
17790     id = syn_name2id(eap->arg);
17791     if (id == 0)
17792 	echo_attr = 0;
17793     else
17794 	echo_attr = syn_id2attr(id);
17795 }
17796 
17797 /*
17798  * ":execute expr1 ..."	execute the result of an expression.
17799  * ":echomsg expr1 ..."	Print a message
17800  * ":echoerr expr1 ..."	Print an error
17801  * Each gets spaces around each argument and a newline at the end for
17802  * echo commands
17803  */
17804     void
17805 ex_execute(eap)
17806     exarg_T	*eap;
17807 {
17808     char_u	*arg = eap->arg;
17809     typval_T	rettv;
17810     int		ret = OK;
17811     char_u	*p;
17812     garray_T	ga;
17813     int		len;
17814     int		save_did_emsg;
17815 
17816     ga_init2(&ga, 1, 80);
17817 
17818     if (eap->skip)
17819 	++emsg_skip;
17820     while (*arg != NUL && *arg != '|' && *arg != '\n')
17821     {
17822 	p = arg;
17823 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
17824 	{
17825 	    /*
17826 	     * Report the invalid expression unless the expression evaluation
17827 	     * has been cancelled due to an aborting error, an interrupt, or an
17828 	     * exception.
17829 	     */
17830 	    if (!aborting())
17831 		EMSG2(_(e_invexpr2), p);
17832 	    ret = FAIL;
17833 	    break;
17834 	}
17835 
17836 	if (!eap->skip)
17837 	{
17838 	    p = get_tv_string(&rettv);
17839 	    len = (int)STRLEN(p);
17840 	    if (ga_grow(&ga, len + 2) == FAIL)
17841 	    {
17842 		clear_tv(&rettv);
17843 		ret = FAIL;
17844 		break;
17845 	    }
17846 	    if (ga.ga_len)
17847 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
17848 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
17849 	    ga.ga_len += len;
17850 	}
17851 
17852 	clear_tv(&rettv);
17853 	arg = skipwhite(arg);
17854     }
17855 
17856     if (ret != FAIL && ga.ga_data != NULL)
17857     {
17858 	if (eap->cmdidx == CMD_echomsg)
17859 	{
17860 	    MSG_ATTR(ga.ga_data, echo_attr);
17861 	    out_flush();
17862 	}
17863 	else if (eap->cmdidx == CMD_echoerr)
17864 	{
17865 	    /* We don't want to abort following commands, restore did_emsg. */
17866 	    save_did_emsg = did_emsg;
17867 	    EMSG((char_u *)ga.ga_data);
17868 	    if (!force_abort)
17869 		did_emsg = save_did_emsg;
17870 	}
17871 	else if (eap->cmdidx == CMD_execute)
17872 	    do_cmdline((char_u *)ga.ga_data,
17873 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
17874     }
17875 
17876     ga_clear(&ga);
17877 
17878     if (eap->skip)
17879 	--emsg_skip;
17880 
17881     eap->nextcmd = check_nextcmd(arg);
17882 }
17883 
17884 /*
17885  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
17886  * "arg" points to the "&" or '+' when called, to "option" when returning.
17887  * Returns NULL when no option name found.  Otherwise pointer to the char
17888  * after the option name.
17889  */
17890     static char_u *
17891 find_option_end(arg, opt_flags)
17892     char_u	**arg;
17893     int		*opt_flags;
17894 {
17895     char_u	*p = *arg;
17896 
17897     ++p;
17898     if (*p == 'g' && p[1] == ':')
17899     {
17900 	*opt_flags = OPT_GLOBAL;
17901 	p += 2;
17902     }
17903     else if (*p == 'l' && p[1] == ':')
17904     {
17905 	*opt_flags = OPT_LOCAL;
17906 	p += 2;
17907     }
17908     else
17909 	*opt_flags = 0;
17910 
17911     if (!ASCII_ISALPHA(*p))
17912 	return NULL;
17913     *arg = p;
17914 
17915     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
17916 	p += 4;	    /* termcap option */
17917     else
17918 	while (ASCII_ISALPHA(*p))
17919 	    ++p;
17920     return p;
17921 }
17922 
17923 /*
17924  * ":function"
17925  */
17926     void
17927 ex_function(eap)
17928     exarg_T	*eap;
17929 {
17930     char_u	*theline;
17931     int		j;
17932     int		c;
17933     int		saved_did_emsg;
17934     char_u	*name = NULL;
17935     char_u	*p;
17936     char_u	*arg;
17937     char_u	*line_arg = NULL;
17938     garray_T	newargs;
17939     garray_T	newlines;
17940     int		varargs = FALSE;
17941     int		mustend = FALSE;
17942     int		flags = 0;
17943     ufunc_T	*fp;
17944     int		indent;
17945     int		nesting;
17946     char_u	*skip_until = NULL;
17947     dictitem_T	*v;
17948     funcdict_T	fudi;
17949     static int	func_nr = 0;	    /* number for nameless function */
17950     int		paren;
17951     hashtab_T	*ht;
17952     int		todo;
17953     hashitem_T	*hi;
17954     int		sourcing_lnum_off;
17955 
17956     /*
17957      * ":function" without argument: list functions.
17958      */
17959     if (ends_excmd(*eap->arg))
17960     {
17961 	if (!eap->skip)
17962 	{
17963 	    todo = func_hashtab.ht_used;
17964 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
17965 	    {
17966 		if (!HASHITEM_EMPTY(hi))
17967 		{
17968 		    --todo;
17969 		    fp = HI2UF(hi);
17970 		    if (!isdigit(*fp->uf_name))
17971 			list_func_head(fp, FALSE);
17972 		}
17973 	    }
17974 	}
17975 	eap->nextcmd = check_nextcmd(eap->arg);
17976 	return;
17977     }
17978 
17979     /*
17980      * ":function /pat": list functions matching pattern.
17981      */
17982     if (*eap->arg == '/')
17983     {
17984 	p = skip_regexp(eap->arg + 1, '/', TRUE, NULL);
17985 	if (!eap->skip)
17986 	{
17987 	    regmatch_T	regmatch;
17988 
17989 	    c = *p;
17990 	    *p = NUL;
17991 	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
17992 	    *p = c;
17993 	    if (regmatch.regprog != NULL)
17994 	    {
17995 		regmatch.rm_ic = p_ic;
17996 
17997 		todo = func_hashtab.ht_used;
17998 		for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
17999 		{
18000 		    if (!HASHITEM_EMPTY(hi))
18001 		    {
18002 			--todo;
18003 			fp = HI2UF(hi);
18004 			if (!isdigit(*fp->uf_name)
18005 				    && vim_regexec(&regmatch, fp->uf_name, 0))
18006 			    list_func_head(fp, FALSE);
18007 		    }
18008 		}
18009 	    }
18010 	}
18011 	if (*p == '/')
18012 	    ++p;
18013 	eap->nextcmd = check_nextcmd(p);
18014 	return;
18015     }
18016 
18017     /*
18018      * Get the function name.  There are these situations:
18019      * func	    normal function name
18020      *		    "name" == func, "fudi.fd_dict" == NULL
18021      * dict.func    new dictionary entry
18022      *		    "name" == NULL, "fudi.fd_dict" set,
18023      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
18024      * dict.func    existing dict entry with a Funcref
18025      *		    "name" == func, "fudi.fd_dict" set,
18026      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
18027      * dict.func    existing dict entry that's not a Funcref
18028      *		    "name" == NULL, "fudi.fd_dict" set,
18029      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
18030      */
18031     p = eap->arg;
18032     name = trans_function_name(&p, eap->skip, 0, &fudi);
18033     paren = (vim_strchr(p, '(') != NULL);
18034     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
18035     {
18036 	/*
18037 	 * Return on an invalid expression in braces, unless the expression
18038 	 * evaluation has been cancelled due to an aborting error, an
18039 	 * interrupt, or an exception.
18040 	 */
18041 	if (!aborting())
18042 	{
18043 	    if (!eap->skip && fudi.fd_newkey != NULL)
18044 		EMSG2(_(e_dictkey), fudi.fd_newkey);
18045 	    vim_free(fudi.fd_newkey);
18046 	    return;
18047 	}
18048 	else
18049 	    eap->skip = TRUE;
18050     }
18051 
18052     /* An error in a function call during evaluation of an expression in magic
18053      * braces should not cause the function not to be defined. */
18054     saved_did_emsg = did_emsg;
18055     did_emsg = FALSE;
18056 
18057     /*
18058      * ":function func" with only function name: list function.
18059      */
18060     if (!paren)
18061     {
18062 	if (!ends_excmd(*skipwhite(p)))
18063 	{
18064 	    EMSG(_(e_trailing));
18065 	    goto ret_free;
18066 	}
18067 	eap->nextcmd = check_nextcmd(p);
18068 	if (eap->nextcmd != NULL)
18069 	    *p = NUL;
18070 	if (!eap->skip && !got_int)
18071 	{
18072 	    fp = find_func(name);
18073 	    if (fp != NULL)
18074 	    {
18075 		list_func_head(fp, TRUE);
18076 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
18077 		{
18078 		    if (FUNCLINE(fp, j) == NULL)
18079 			continue;
18080 		    msg_putchar('\n');
18081 		    msg_outnum((long)(j + 1));
18082 		    if (j < 9)
18083 			msg_putchar(' ');
18084 		    if (j < 99)
18085 			msg_putchar(' ');
18086 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
18087 		    out_flush();	/* show a line at a time */
18088 		    ui_breakcheck();
18089 		}
18090 		if (!got_int)
18091 		{
18092 		    msg_putchar('\n');
18093 		    msg_puts((char_u *)"   endfunction");
18094 		}
18095 	    }
18096 	    else
18097 		emsg_funcname("E123: Undefined function: %s", name);
18098 	}
18099 	goto ret_free;
18100     }
18101 
18102     /*
18103      * ":function name(arg1, arg2)" Define function.
18104      */
18105     p = skipwhite(p);
18106     if (*p != '(')
18107     {
18108 	if (!eap->skip)
18109 	{
18110 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
18111 	    goto ret_free;
18112 	}
18113 	/* attempt to continue by skipping some text */
18114 	if (vim_strchr(p, '(') != NULL)
18115 	    p = vim_strchr(p, '(');
18116     }
18117     p = skipwhite(p + 1);
18118 
18119     ga_init2(&newargs, (int)sizeof(char_u *), 3);
18120     ga_init2(&newlines, (int)sizeof(char_u *), 3);
18121 
18122     if (!eap->skip)
18123     {
18124 	/* Check the name of the function. */
18125 	if (name != NULL)
18126 	    arg = name;
18127 	else
18128 	    arg = fudi.fd_newkey;
18129 	if (arg != NULL)
18130 	{
18131 	    if (*arg == K_SPECIAL)
18132 		j = 3;
18133 	    else
18134 		j = 0;
18135 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
18136 						      : eval_isnamec(arg[j])))
18137 		++j;
18138 	    if (arg[j] != NUL)
18139 		emsg_funcname(_(e_invarg2), arg);
18140 	}
18141     }
18142 
18143     /*
18144      * Isolate the arguments: "arg1, arg2, ...)"
18145      */
18146     while (*p != ')')
18147     {
18148 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
18149 	{
18150 	    varargs = TRUE;
18151 	    p += 3;
18152 	    mustend = TRUE;
18153 	}
18154 	else
18155 	{
18156 	    arg = p;
18157 	    while (ASCII_ISALNUM(*p) || *p == '_')
18158 		++p;
18159 	    if (arg == p || isdigit(*arg)
18160 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
18161 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
18162 	    {
18163 		if (!eap->skip)
18164 		    EMSG2(_("E125: Illegal argument: %s"), arg);
18165 		break;
18166 	    }
18167 	    if (ga_grow(&newargs, 1) == FAIL)
18168 		goto erret;
18169 	    c = *p;
18170 	    *p = NUL;
18171 	    arg = vim_strsave(arg);
18172 	    if (arg == NULL)
18173 		goto erret;
18174 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
18175 	    *p = c;
18176 	    newargs.ga_len++;
18177 	    if (*p == ',')
18178 		++p;
18179 	    else
18180 		mustend = TRUE;
18181 	}
18182 	p = skipwhite(p);
18183 	if (mustend && *p != ')')
18184 	{
18185 	    if (!eap->skip)
18186 		EMSG2(_(e_invarg2), eap->arg);
18187 	    break;
18188 	}
18189     }
18190     ++p;	/* skip the ')' */
18191 
18192     /* find extra arguments "range", "dict" and "abort" */
18193     for (;;)
18194     {
18195 	p = skipwhite(p);
18196 	if (STRNCMP(p, "range", 5) == 0)
18197 	{
18198 	    flags |= FC_RANGE;
18199 	    p += 5;
18200 	}
18201 	else if (STRNCMP(p, "dict", 4) == 0)
18202 	{
18203 	    flags |= FC_DICT;
18204 	    p += 4;
18205 	}
18206 	else if (STRNCMP(p, "abort", 5) == 0)
18207 	{
18208 	    flags |= FC_ABORT;
18209 	    p += 5;
18210 	}
18211 	else
18212 	    break;
18213     }
18214 
18215     /* When there is a line break use what follows for the function body.
18216      * Makes 'exe "func Test()\n...\nendfunc"' work. */
18217     if (*p == '\n')
18218 	line_arg = p + 1;
18219     else if (*p != NUL && *p != '"' && !eap->skip && !did_emsg)
18220 	EMSG(_(e_trailing));
18221 
18222     /*
18223      * Read the body of the function, until ":endfunction" is found.
18224      */
18225     if (KeyTyped)
18226     {
18227 	/* Check if the function already exists, don't let the user type the
18228 	 * whole function before telling him it doesn't work!  For a script we
18229 	 * need to skip the body to be able to find what follows. */
18230 	if (!eap->skip && !eap->forceit)
18231 	{
18232 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
18233 		EMSG(_(e_funcdict));
18234 	    else if (name != NULL && find_func(name) != NULL)
18235 		emsg_funcname(e_funcexts, name);
18236 	}
18237 
18238 	if (!eap->skip && did_emsg)
18239 	    goto erret;
18240 
18241 	msg_putchar('\n');	    /* don't overwrite the function name */
18242 	cmdline_row = msg_row;
18243     }
18244 
18245     indent = 2;
18246     nesting = 0;
18247     for (;;)
18248     {
18249 	msg_scroll = TRUE;
18250 	need_wait_return = FALSE;
18251 	sourcing_lnum_off = sourcing_lnum;
18252 
18253 	if (line_arg != NULL)
18254 	{
18255 	    /* Use eap->arg, split up in parts by line breaks. */
18256 	    theline = line_arg;
18257 	    p = vim_strchr(theline, '\n');
18258 	    if (p == NULL)
18259 		line_arg += STRLEN(line_arg);
18260 	    else
18261 	    {
18262 		*p = NUL;
18263 		line_arg = p + 1;
18264 	    }
18265 	}
18266 	else if (eap->getline == NULL)
18267 	    theline = getcmdline(':', 0L, indent);
18268 	else
18269 	    theline = eap->getline(':', eap->cookie, indent);
18270 	if (KeyTyped)
18271 	    lines_left = Rows - 1;
18272 	if (theline == NULL)
18273 	{
18274 	    EMSG(_("E126: Missing :endfunction"));
18275 	    goto erret;
18276 	}
18277 
18278 	/* Detect line continuation: sourcing_lnum increased more than one. */
18279 	if (sourcing_lnum > sourcing_lnum_off + 1)
18280 	    sourcing_lnum_off = sourcing_lnum - sourcing_lnum_off - 1;
18281 	else
18282 	    sourcing_lnum_off = 0;
18283 
18284 	if (skip_until != NULL)
18285 	{
18286 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
18287 	     * don't check for ":endfunc". */
18288 	    if (STRCMP(theline, skip_until) == 0)
18289 	    {
18290 		vim_free(skip_until);
18291 		skip_until = NULL;
18292 	    }
18293 	}
18294 	else
18295 	{
18296 	    /* skip ':' and blanks*/
18297 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
18298 		;
18299 
18300 	    /* Check for "endfunction". */
18301 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
18302 	    {
18303 		if (line_arg == NULL)
18304 		    vim_free(theline);
18305 		break;
18306 	    }
18307 
18308 	    /* Increase indent inside "if", "while", "for" and "try", decrease
18309 	     * at "end". */
18310 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
18311 		indent -= 2;
18312 	    else if (STRNCMP(p, "if", 2) == 0
18313 		    || STRNCMP(p, "wh", 2) == 0
18314 		    || STRNCMP(p, "for", 3) == 0
18315 		    || STRNCMP(p, "try", 3) == 0)
18316 		indent += 2;
18317 
18318 	    /* Check for defining a function inside this function. */
18319 	    if (checkforcmd(&p, "function", 2))
18320 	    {
18321 		if (*p == '!')
18322 		    p = skipwhite(p + 1);
18323 		p += eval_fname_script(p);
18324 		if (ASCII_ISALPHA(*p))
18325 		{
18326 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
18327 		    if (*skipwhite(p) == '(')
18328 		    {
18329 			++nesting;
18330 			indent += 2;
18331 		    }
18332 		}
18333 	    }
18334 
18335 	    /* Check for ":append" or ":insert". */
18336 	    p = skip_range(p, NULL);
18337 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
18338 		    || (p[0] == 'i'
18339 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
18340 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
18341 		skip_until = vim_strsave((char_u *)".");
18342 
18343 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
18344 	    arg = skipwhite(skiptowhite(p));
18345 	    if (arg[0] == '<' && arg[1] =='<'
18346 		    && ((p[0] == 'p' && p[1] == 'y'
18347 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
18348 			|| (p[0] == 'p' && p[1] == 'e'
18349 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
18350 			|| (p[0] == 't' && p[1] == 'c'
18351 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
18352 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
18353 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
18354 			|| (p[0] == 'm' && p[1] == 'z'
18355 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
18356 			))
18357 	    {
18358 		/* ":python <<" continues until a dot, like ":append" */
18359 		p = skipwhite(arg + 2);
18360 		if (*p == NUL)
18361 		    skip_until = vim_strsave((char_u *)".");
18362 		else
18363 		    skip_until = vim_strsave(p);
18364 	    }
18365 	}
18366 
18367 	/* Add the line to the function. */
18368 	if (ga_grow(&newlines, 1 + sourcing_lnum_off) == FAIL)
18369 	{
18370 	    if (line_arg == NULL)
18371 		vim_free(theline);
18372 	    goto erret;
18373 	}
18374 
18375 	/* Copy the line to newly allocated memory.  get_one_sourceline()
18376 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
18377 	 * is an extra alloc/free. */
18378 	p = vim_strsave(theline);
18379 	if (p != NULL)
18380 	{
18381 	    if (line_arg == NULL)
18382 		vim_free(theline);
18383 	    theline = p;
18384 	}
18385 
18386 	((char_u **)(newlines.ga_data))[newlines.ga_len++] = theline;
18387 
18388 	/* Add NULL lines for continuation lines, so that the line count is
18389 	 * equal to the index in the growarray.   */
18390 	while (sourcing_lnum_off-- > 0)
18391 	    ((char_u **)(newlines.ga_data))[newlines.ga_len++] = NULL;
18392 
18393 	/* Check for end of eap->arg. */
18394 	if (line_arg != NULL && *line_arg == NUL)
18395 	    line_arg = NULL;
18396     }
18397 
18398     /* Don't define the function when skipping commands or when an error was
18399      * detected. */
18400     if (eap->skip || did_emsg)
18401 	goto erret;
18402 
18403     /*
18404      * If there are no errors, add the function
18405      */
18406     if (fudi.fd_dict == NULL)
18407     {
18408 	v = find_var(name, &ht);
18409 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
18410 	{
18411 	    emsg_funcname("E707: Function name conflicts with variable: %s",
18412 									name);
18413 	    goto erret;
18414 	}
18415 
18416 	fp = find_func(name);
18417 	if (fp != NULL)
18418 	{
18419 	    if (!eap->forceit)
18420 	    {
18421 		emsg_funcname(e_funcexts, name);
18422 		goto erret;
18423 	    }
18424 	    if (fp->uf_calls > 0)
18425 	    {
18426 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
18427 									name);
18428 		goto erret;
18429 	    }
18430 	    /* redefine existing function */
18431 	    ga_clear_strings(&(fp->uf_args));
18432 	    ga_clear_strings(&(fp->uf_lines));
18433 	    vim_free(name);
18434 	    name = NULL;
18435 	}
18436     }
18437     else
18438     {
18439 	char	numbuf[20];
18440 
18441 	fp = NULL;
18442 	if (fudi.fd_newkey == NULL && !eap->forceit)
18443 	{
18444 	    EMSG(_(e_funcdict));
18445 	    goto erret;
18446 	}
18447 	if (fudi.fd_di == NULL)
18448 	{
18449 	    /* Can't add a function to a locked dictionary */
18450 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
18451 		goto erret;
18452 	}
18453 	    /* Can't change an existing function if it is locked */
18454 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
18455 	    goto erret;
18456 
18457 	/* Give the function a sequential number.  Can only be used with a
18458 	 * Funcref! */
18459 	vim_free(name);
18460 	sprintf(numbuf, "%d", ++func_nr);
18461 	name = vim_strsave((char_u *)numbuf);
18462 	if (name == NULL)
18463 	    goto erret;
18464     }
18465 
18466     if (fp == NULL)
18467     {
18468 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
18469 	{
18470 	    int	    slen, plen;
18471 	    char_u  *scriptname;
18472 
18473 	    /* Check that the autoload name matches the script name. */
18474 	    j = FAIL;
18475 	    if (sourcing_name != NULL)
18476 	    {
18477 		scriptname = autoload_name(name);
18478 		if (scriptname != NULL)
18479 		{
18480 		    p = vim_strchr(scriptname, '/');
18481 		    plen = STRLEN(p);
18482 		    slen = STRLEN(sourcing_name);
18483 		    if (slen > plen && fnamecmp(p,
18484 					    sourcing_name + slen - plen) == 0)
18485 			j = OK;
18486 		    vim_free(scriptname);
18487 		}
18488 	    }
18489 	    if (j == FAIL)
18490 	    {
18491 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
18492 		goto erret;
18493 	    }
18494 	}
18495 
18496 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
18497 	if (fp == NULL)
18498 	    goto erret;
18499 
18500 	if (fudi.fd_dict != NULL)
18501 	{
18502 	    if (fudi.fd_di == NULL)
18503 	    {
18504 		/* add new dict entry */
18505 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
18506 		if (fudi.fd_di == NULL)
18507 		{
18508 		    vim_free(fp);
18509 		    goto erret;
18510 		}
18511 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
18512 		{
18513 		    vim_free(fudi.fd_di);
18514 		    goto erret;
18515 		}
18516 	    }
18517 	    else
18518 		/* overwrite existing dict entry */
18519 		clear_tv(&fudi.fd_di->di_tv);
18520 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
18521 	    fudi.fd_di->di_tv.v_lock = 0;
18522 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
18523 	    fp->uf_refcount = 1;
18524 	}
18525 
18526 	/* insert the new function in the function list */
18527 	STRCPY(fp->uf_name, name);
18528 	hash_add(&func_hashtab, UF2HIKEY(fp));
18529     }
18530     fp->uf_args = newargs;
18531     fp->uf_lines = newlines;
18532 #ifdef FEAT_PROFILE
18533     fp->uf_tml_count = NULL;
18534     fp->uf_tml_total = NULL;
18535     fp->uf_tml_self = NULL;
18536     fp->uf_profiling = FALSE;
18537     if (prof_def_func())
18538 	func_do_profile(fp);
18539 #endif
18540     fp->uf_varargs = varargs;
18541     fp->uf_flags = flags;
18542     fp->uf_calls = 0;
18543     fp->uf_script_ID = current_SID;
18544     goto ret_free;
18545 
18546 erret:
18547     ga_clear_strings(&newargs);
18548     ga_clear_strings(&newlines);
18549 ret_free:
18550     vim_free(skip_until);
18551     vim_free(fudi.fd_newkey);
18552     vim_free(name);
18553     did_emsg |= saved_did_emsg;
18554 }
18555 
18556 /*
18557  * Get a function name, translating "<SID>" and "<SNR>".
18558  * Also handles a Funcref in a List or Dictionary.
18559  * Returns the function name in allocated memory, or NULL for failure.
18560  * flags:
18561  * TFN_INT:   internal function name OK
18562  * TFN_QUIET: be quiet
18563  * Advances "pp" to just after the function name (if no error).
18564  */
18565     static char_u *
18566 trans_function_name(pp, skip, flags, fdp)
18567     char_u	**pp;
18568     int		skip;		/* only find the end, don't evaluate */
18569     int		flags;
18570     funcdict_T	*fdp;		/* return: info about dictionary used */
18571 {
18572     char_u	*name = NULL;
18573     char_u	*start;
18574     char_u	*end;
18575     int		lead;
18576     char_u	sid_buf[20];
18577     int		len;
18578     lval_T	lv;
18579 
18580     if (fdp != NULL)
18581 	vim_memset(fdp, 0, sizeof(funcdict_T));
18582     start = *pp;
18583 
18584     /* Check for hard coded <SNR>: already translated function ID (from a user
18585      * command). */
18586     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
18587 						   && (*pp)[2] == (int)KE_SNR)
18588     {
18589 	*pp += 3;
18590 	len = get_id_len(pp) + 3;
18591 	return vim_strnsave(start, len);
18592     }
18593 
18594     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
18595      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
18596     lead = eval_fname_script(start);
18597     if (lead > 2)
18598 	start += lead;
18599 
18600     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
18601 					      lead > 2 ? 0 : FNE_CHECK_START);
18602     if (end == start)
18603     {
18604 	if (!skip)
18605 	    EMSG(_("E129: Function name required"));
18606 	goto theend;
18607     }
18608     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
18609     {
18610 	/*
18611 	 * Report an invalid expression in braces, unless the expression
18612 	 * evaluation has been cancelled due to an aborting error, an
18613 	 * interrupt, or an exception.
18614 	 */
18615 	if (!aborting())
18616 	{
18617 	    if (end != NULL)
18618 		EMSG2(_(e_invarg2), start);
18619 	}
18620 	else
18621 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
18622 	goto theend;
18623     }
18624 
18625     if (lv.ll_tv != NULL)
18626     {
18627 	if (fdp != NULL)
18628 	{
18629 	    fdp->fd_dict = lv.ll_dict;
18630 	    fdp->fd_newkey = lv.ll_newkey;
18631 	    lv.ll_newkey = NULL;
18632 	    fdp->fd_di = lv.ll_di;
18633 	}
18634 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
18635 	{
18636 	    name = vim_strsave(lv.ll_tv->vval.v_string);
18637 	    *pp = end;
18638 	}
18639 	else
18640 	{
18641 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
18642 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
18643 		EMSG(_(e_funcref));
18644 	    else
18645 		*pp = end;
18646 	    name = NULL;
18647 	}
18648 	goto theend;
18649     }
18650 
18651     if (lv.ll_name == NULL)
18652     {
18653 	/* Error found, but continue after the function name. */
18654 	*pp = end;
18655 	goto theend;
18656     }
18657 
18658     if (lv.ll_exp_name != NULL)
18659     {
18660 	len = STRLEN(lv.ll_exp_name);
18661 	if (lead <= 2 && lv.ll_name == lv.ll_exp_name
18662 					 && STRNCMP(lv.ll_name, "s:", 2) == 0)
18663 	{
18664 	    /* When there was "s:" already or the name expanded to get a
18665 	     * leading "s:" then remove it. */
18666 	    lv.ll_name += 2;
18667 	    len -= 2;
18668 	    lead = 2;
18669 	}
18670     }
18671     else
18672     {
18673 	if (lead == 2)	/* skip over "s:" */
18674 	    lv.ll_name += 2;
18675 	len = (int)(end - lv.ll_name);
18676     }
18677 
18678     /*
18679      * Copy the function name to allocated memory.
18680      * Accept <SID>name() inside a script, translate into <SNR>123_name().
18681      * Accept <SNR>123_name() outside a script.
18682      */
18683     if (skip)
18684 	lead = 0;	/* do nothing */
18685     else if (lead > 0)
18686     {
18687 	lead = 3;
18688 	if (eval_fname_sid(lv.ll_exp_name != NULL ? lv.ll_exp_name : *pp))
18689 	{
18690 	    /* It's "s:" or "<SID>" */
18691 	    if (current_SID <= 0)
18692 	    {
18693 		EMSG(_(e_usingsid));
18694 		goto theend;
18695 	    }
18696 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
18697 	    lead += (int)STRLEN(sid_buf);
18698 	}
18699     }
18700     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
18701     {
18702 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
18703 	goto theend;
18704     }
18705     name = alloc((unsigned)(len + lead + 1));
18706     if (name != NULL)
18707     {
18708 	if (lead > 0)
18709 	{
18710 	    name[0] = K_SPECIAL;
18711 	    name[1] = KS_EXTRA;
18712 	    name[2] = (int)KE_SNR;
18713 	    if (lead > 3)	/* If it's "<SID>" */
18714 		STRCPY(name + 3, sid_buf);
18715 	}
18716 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
18717 	name[len + lead] = NUL;
18718     }
18719     *pp = end;
18720 
18721 theend:
18722     clear_lval(&lv);
18723     return name;
18724 }
18725 
18726 /*
18727  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
18728  * Return 2 if "p" starts with "s:".
18729  * Return 0 otherwise.
18730  */
18731     static int
18732 eval_fname_script(p)
18733     char_u	*p;
18734 {
18735     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
18736 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
18737 	return 5;
18738     if (p[0] == 's' && p[1] == ':')
18739 	return 2;
18740     return 0;
18741 }
18742 
18743 /*
18744  * Return TRUE if "p" starts with "<SID>" or "s:".
18745  * Only works if eval_fname_script() returned non-zero for "p"!
18746  */
18747     static int
18748 eval_fname_sid(p)
18749     char_u	*p;
18750 {
18751     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
18752 }
18753 
18754 /*
18755  * List the head of the function: "name(arg1, arg2)".
18756  */
18757     static void
18758 list_func_head(fp, indent)
18759     ufunc_T	*fp;
18760     int		indent;
18761 {
18762     int		j;
18763 
18764     msg_start();
18765     if (indent)
18766 	MSG_PUTS("   ");
18767     MSG_PUTS("function ");
18768     if (fp->uf_name[0] == K_SPECIAL)
18769     {
18770 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
18771 	msg_puts(fp->uf_name + 3);
18772     }
18773     else
18774 	msg_puts(fp->uf_name);
18775     msg_putchar('(');
18776     for (j = 0; j < fp->uf_args.ga_len; ++j)
18777     {
18778 	if (j)
18779 	    MSG_PUTS(", ");
18780 	msg_puts(FUNCARG(fp, j));
18781     }
18782     if (fp->uf_varargs)
18783     {
18784 	if (j)
18785 	    MSG_PUTS(", ");
18786 	MSG_PUTS("...");
18787     }
18788     msg_putchar(')');
18789     msg_clr_eos();
18790     if (p_verbose > 0)
18791 	last_set_msg(fp->uf_script_ID);
18792 }
18793 
18794 /*
18795  * Find a function by name, return pointer to it in ufuncs.
18796  * Return NULL for unknown function.
18797  */
18798     static ufunc_T *
18799 find_func(name)
18800     char_u	*name;
18801 {
18802     hashitem_T	*hi;
18803 
18804     hi = hash_find(&func_hashtab, name);
18805     if (!HASHITEM_EMPTY(hi))
18806 	return HI2UF(hi);
18807     return NULL;
18808 }
18809 
18810 #if defined(EXITFREE) || defined(PROTO)
18811     void
18812 free_all_functions()
18813 {
18814     hashitem_T	*hi;
18815 
18816     /* Need to start all over every time, because func_free() may change the
18817      * hash table. */
18818     while (func_hashtab.ht_used > 0)
18819 	for (hi = func_hashtab.ht_array; ; ++hi)
18820 	    if (!HASHITEM_EMPTY(hi))
18821 	    {
18822 		func_free(HI2UF(hi));
18823 		break;
18824 	    }
18825 }
18826 #endif
18827 
18828 /*
18829  * Return TRUE if a function "name" exists.
18830  */
18831     static int
18832 function_exists(name)
18833     char_u *name;
18834 {
18835     char_u  *p = name;
18836     int	    n = FALSE;
18837 
18838     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
18839     if (p != NULL)
18840     {
18841 	if (builtin_function(p))
18842 	    n = (find_internal_func(p) >= 0);
18843 	else
18844 	    n = (find_func(p) != NULL);
18845 	vim_free(p);
18846     }
18847     return n;
18848 }
18849 
18850 /*
18851  * Return TRUE if "name" looks like a builtin function name: starts with a
18852  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
18853  */
18854     static int
18855 builtin_function(name)
18856     char_u *name;
18857 {
18858     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
18859 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
18860 }
18861 
18862 #if defined(FEAT_PROFILE) || defined(PROTO)
18863 /*
18864  * Start profiling function "fp".
18865  */
18866     static void
18867 func_do_profile(fp)
18868     ufunc_T	*fp;
18869 {
18870     fp->uf_tm_count = 0;
18871     profile_zero(&fp->uf_tm_self);
18872     profile_zero(&fp->uf_tm_total);
18873     if (fp->uf_tml_count == NULL)
18874 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
18875 					 (sizeof(int) * fp->uf_lines.ga_len));
18876     if (fp->uf_tml_total == NULL)
18877 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
18878 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
18879     if (fp->uf_tml_self == NULL)
18880 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
18881 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
18882     fp->uf_tml_idx = -1;
18883     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
18884 						   || fp->uf_tml_self == NULL)
18885 	return;	    /* out of memory */
18886 
18887     fp->uf_profiling = TRUE;
18888 }
18889 
18890 /*
18891  * Dump the profiling results for all functions in file "fd".
18892  */
18893     void
18894 func_dump_profile(fd)
18895     FILE    *fd;
18896 {
18897     hashitem_T	*hi;
18898     int		todo;
18899     ufunc_T	*fp;
18900     int		i;
18901     ufunc_T	**sorttab;
18902     int		st_len = 0;
18903 
18904     todo = func_hashtab.ht_used;
18905     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
18906 
18907     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
18908     {
18909 	if (!HASHITEM_EMPTY(hi))
18910 	{
18911 	    --todo;
18912 	    fp = HI2UF(hi);
18913 	    if (fp->uf_profiling)
18914 	    {
18915 		if (sorttab != NULL)
18916 		    sorttab[st_len++] = fp;
18917 
18918 		if (fp->uf_name[0] == K_SPECIAL)
18919 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
18920 		else
18921 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
18922 		if (fp->uf_tm_count == 1)
18923 		    fprintf(fd, "Called 1 time\n");
18924 		else
18925 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
18926 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
18927 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
18928 		fprintf(fd, "\n");
18929 		fprintf(fd, "count  total (s)   self (s)\n");
18930 
18931 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
18932 		{
18933 		    if (FUNCLINE(fp, i) == NULL)
18934 			continue;
18935 		    prof_func_line(fd, fp->uf_tml_count[i],
18936 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
18937 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
18938 		}
18939 		fprintf(fd, "\n");
18940 	    }
18941 	}
18942     }
18943 
18944     if (sorttab != NULL && st_len > 0)
18945     {
18946 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
18947 							      prof_total_cmp);
18948 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
18949 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
18950 							      prof_self_cmp);
18951 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
18952     }
18953 }
18954 
18955     static void
18956 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
18957     FILE	*fd;
18958     ufunc_T	**sorttab;
18959     int		st_len;
18960     char	*title;
18961     int		prefer_self;	/* when equal print only self time */
18962 {
18963     int		i;
18964     ufunc_T	*fp;
18965 
18966     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
18967     fprintf(fd, "count  total (s)   self (s)  function\n");
18968     for (i = 0; i < 20 && i < st_len; ++i)
18969     {
18970 	fp = sorttab[i];
18971 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
18972 								 prefer_self);
18973 	if (fp->uf_name[0] == K_SPECIAL)
18974 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
18975 	else
18976 	    fprintf(fd, " %s()\n", fp->uf_name);
18977     }
18978     fprintf(fd, "\n");
18979 }
18980 
18981 /*
18982  * Print the count and times for one function or function line.
18983  */
18984     static void
18985 prof_func_line(fd, count, total, self, prefer_self)
18986     FILE	*fd;
18987     int		count;
18988     proftime_T	*total;
18989     proftime_T	*self;
18990     int		prefer_self;	/* when equal print only self time */
18991 {
18992     if (count > 0)
18993     {
18994 	fprintf(fd, "%5d ", count);
18995 	if (prefer_self && profile_equal(total, self))
18996 	    fprintf(fd, "           ");
18997 	else
18998 	    fprintf(fd, "%s ", profile_msg(total));
18999 	if (!prefer_self && profile_equal(total, self))
19000 	    fprintf(fd, "           ");
19001 	else
19002 	    fprintf(fd, "%s ", profile_msg(self));
19003     }
19004     else
19005 	fprintf(fd, "                            ");
19006 }
19007 
19008 /*
19009  * Compare function for total time sorting.
19010  */
19011     static int
19012 #ifdef __BORLANDC__
19013 _RTLENTRYF
19014 #endif
19015 prof_total_cmp(s1, s2)
19016     const void	*s1;
19017     const void	*s2;
19018 {
19019     ufunc_T	*p1, *p2;
19020 
19021     p1 = *(ufunc_T **)s1;
19022     p2 = *(ufunc_T **)s2;
19023     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
19024 }
19025 
19026 /*
19027  * Compare function for self time sorting.
19028  */
19029     static int
19030 #ifdef __BORLANDC__
19031 _RTLENTRYF
19032 #endif
19033 prof_self_cmp(s1, s2)
19034     const void	*s1;
19035     const void	*s2;
19036 {
19037     ufunc_T	*p1, *p2;
19038 
19039     p1 = *(ufunc_T **)s1;
19040     p2 = *(ufunc_T **)s2;
19041     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
19042 }
19043 
19044 #endif
19045 
19046 /* The names of packages that once were loaded is remembered. */
19047 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
19048 
19049 /*
19050  * If "name" has a package name try autoloading the script for it.
19051  * Return TRUE if a package was loaded.
19052  */
19053     static int
19054 script_autoload(name, reload)
19055     char_u	*name;
19056     int		reload;	    /* load script again when already loaded */
19057 {
19058     char_u	*p;
19059     char_u	*scriptname, *tofree;
19060     int		ret = FALSE;
19061     int		i;
19062 
19063     /* If there is no '#' after name[0] there is no package name. */
19064     p = vim_strchr(name, AUTOLOAD_CHAR);
19065     if (p == NULL || p == name)
19066 	return FALSE;
19067 
19068     tofree = scriptname = autoload_name(name);
19069 
19070     /* Find the name in the list of previously loaded package names.  Skip
19071      * "autoload/", it's always the same. */
19072     for (i = 0; i < ga_loaded.ga_len; ++i)
19073 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
19074 	    break;
19075     if (!reload && i < ga_loaded.ga_len)
19076 	ret = FALSE;	    /* was loaded already */
19077     else
19078     {
19079 	/* Remember the name if it wasn't loaded already. */
19080 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
19081 	{
19082 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
19083 	    tofree = NULL;
19084 	}
19085 
19086 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
19087 	if (source_runtime(scriptname, FALSE) == OK)
19088 	    ret = TRUE;
19089     }
19090 
19091     vim_free(tofree);
19092     return ret;
19093 }
19094 
19095 /*
19096  * Return the autoload script name for a function or variable name.
19097  * Returns NULL when out of memory.
19098  */
19099     static char_u *
19100 autoload_name(name)
19101     char_u	*name;
19102 {
19103     char_u	*p;
19104     char_u	*scriptname;
19105 
19106     /* Get the script file name: replace '#' with '/', append ".vim". */
19107     scriptname = alloc((unsigned)(STRLEN(name) + 14));
19108     if (scriptname == NULL)
19109 	return FALSE;
19110     STRCPY(scriptname, "autoload/");
19111     STRCAT(scriptname, name);
19112     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
19113     STRCAT(scriptname, ".vim");
19114     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
19115 	*p = '/';
19116     return scriptname;
19117 }
19118 
19119 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
19120 
19121 /*
19122  * Function given to ExpandGeneric() to obtain the list of user defined
19123  * function names.
19124  */
19125     char_u *
19126 get_user_func_name(xp, idx)
19127     expand_T	*xp;
19128     int		idx;
19129 {
19130     static long_u	done;
19131     static hashitem_T	*hi;
19132     ufunc_T		*fp;
19133 
19134     if (idx == 0)
19135     {
19136 	done = 0;
19137 	hi = func_hashtab.ht_array;
19138     }
19139     if (done < func_hashtab.ht_used)
19140     {
19141 	if (done++ > 0)
19142 	    ++hi;
19143 	while (HASHITEM_EMPTY(hi))
19144 	    ++hi;
19145 	fp = HI2UF(hi);
19146 
19147 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
19148 	    return fp->uf_name;	/* prevents overflow */
19149 
19150 	cat_func_name(IObuff, fp);
19151 	if (xp->xp_context != EXPAND_USER_FUNC)
19152 	{
19153 	    STRCAT(IObuff, "(");
19154 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
19155 		STRCAT(IObuff, ")");
19156 	}
19157 	return IObuff;
19158     }
19159     return NULL;
19160 }
19161 
19162 #endif /* FEAT_CMDL_COMPL */
19163 
19164 /*
19165  * Copy the function name of "fp" to buffer "buf".
19166  * "buf" must be able to hold the function name plus three bytes.
19167  * Takes care of script-local function names.
19168  */
19169     static void
19170 cat_func_name(buf, fp)
19171     char_u	*buf;
19172     ufunc_T	*fp;
19173 {
19174     if (fp->uf_name[0] == K_SPECIAL)
19175     {
19176 	STRCPY(buf, "<SNR>");
19177 	STRCAT(buf, fp->uf_name + 3);
19178     }
19179     else
19180 	STRCPY(buf, fp->uf_name);
19181 }
19182 
19183 /*
19184  * ":delfunction {name}"
19185  */
19186     void
19187 ex_delfunction(eap)
19188     exarg_T	*eap;
19189 {
19190     ufunc_T	*fp = NULL;
19191     char_u	*p;
19192     char_u	*name;
19193     funcdict_T	fudi;
19194 
19195     p = eap->arg;
19196     name = trans_function_name(&p, eap->skip, 0, &fudi);
19197     vim_free(fudi.fd_newkey);
19198     if (name == NULL)
19199     {
19200 	if (fudi.fd_dict != NULL && !eap->skip)
19201 	    EMSG(_(e_funcref));
19202 	return;
19203     }
19204     if (!ends_excmd(*skipwhite(p)))
19205     {
19206 	vim_free(name);
19207 	EMSG(_(e_trailing));
19208 	return;
19209     }
19210     eap->nextcmd = check_nextcmd(p);
19211     if (eap->nextcmd != NULL)
19212 	*p = NUL;
19213 
19214     if (!eap->skip)
19215 	fp = find_func(name);
19216     vim_free(name);
19217 
19218     if (!eap->skip)
19219     {
19220 	if (fp == NULL)
19221 	{
19222 	    EMSG2(_(e_nofunc), eap->arg);
19223 	    return;
19224 	}
19225 	if (fp->uf_calls > 0)
19226 	{
19227 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
19228 	    return;
19229 	}
19230 
19231 	if (fudi.fd_dict != NULL)
19232 	{
19233 	    /* Delete the dict item that refers to the function, it will
19234 	     * invoke func_unref() and possibly delete the function. */
19235 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
19236 	}
19237 	else
19238 	    func_free(fp);
19239     }
19240 }
19241 
19242 /*
19243  * Free a function and remove it from the list of functions.
19244  */
19245     static void
19246 func_free(fp)
19247     ufunc_T *fp;
19248 {
19249     hashitem_T	*hi;
19250 
19251     /* clear this function */
19252     ga_clear_strings(&(fp->uf_args));
19253     ga_clear_strings(&(fp->uf_lines));
19254 #ifdef FEAT_PROFILE
19255     vim_free(fp->uf_tml_count);
19256     vim_free(fp->uf_tml_total);
19257     vim_free(fp->uf_tml_self);
19258 #endif
19259 
19260     /* remove the function from the function hashtable */
19261     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
19262     if (HASHITEM_EMPTY(hi))
19263 	EMSG2(_(e_intern2), "func_free()");
19264     else
19265 	hash_remove(&func_hashtab, hi);
19266 
19267     vim_free(fp);
19268 }
19269 
19270 /*
19271  * Unreference a Function: decrement the reference count and free it when it
19272  * becomes zero.  Only for numbered functions.
19273  */
19274     static void
19275 func_unref(name)
19276     char_u	*name;
19277 {
19278     ufunc_T *fp;
19279 
19280     if (name != NULL && isdigit(*name))
19281     {
19282 	fp = find_func(name);
19283 	if (fp == NULL)
19284 	    EMSG2(_(e_intern2), "func_unref()");
19285 	else if (--fp->uf_refcount <= 0)
19286 	{
19287 	    /* Only delete it when it's not being used.  Otherwise it's done
19288 	     * when "uf_calls" becomes zero. */
19289 	    if (fp->uf_calls == 0)
19290 		func_free(fp);
19291 	}
19292     }
19293 }
19294 
19295 /*
19296  * Count a reference to a Function.
19297  */
19298     static void
19299 func_ref(name)
19300     char_u	*name;
19301 {
19302     ufunc_T *fp;
19303 
19304     if (name != NULL && isdigit(*name))
19305     {
19306 	fp = find_func(name);
19307 	if (fp == NULL)
19308 	    EMSG2(_(e_intern2), "func_ref()");
19309 	else
19310 	    ++fp->uf_refcount;
19311     }
19312 }
19313 
19314 /*
19315  * Call a user function.
19316  */
19317     static void
19318 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
19319     ufunc_T	*fp;		/* pointer to function */
19320     int		argcount;	/* nr of args */
19321     typval_T	*argvars;	/* arguments */
19322     typval_T	*rettv;		/* return value */
19323     linenr_T	firstline;	/* first line of range */
19324     linenr_T	lastline;	/* last line of range */
19325     dict_T	*selfdict;	/* Dictionary for "self" */
19326 {
19327     char_u	*save_sourcing_name;
19328     linenr_T	save_sourcing_lnum;
19329     scid_T	save_current_SID;
19330     funccall_T	fc;
19331     int		save_did_emsg;
19332     static int	depth = 0;
19333     dictitem_T	*v;
19334     int		fixvar_idx = 0;	/* index in fixvar[] */
19335     int		i;
19336     int		ai;
19337     char_u	numbuf[NUMBUFLEN];
19338     char_u	*name;
19339 #ifdef FEAT_PROFILE
19340     proftime_T	wait_start;
19341 #endif
19342 
19343     /* If depth of calling is getting too high, don't execute the function */
19344     if (depth >= p_mfd)
19345     {
19346 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
19347 	rettv->v_type = VAR_NUMBER;
19348 	rettv->vval.v_number = -1;
19349 	return;
19350     }
19351     ++depth;
19352 
19353     line_breakcheck();		/* check for CTRL-C hit */
19354 
19355     fc.caller = current_funccal;
19356     current_funccal = &fc;
19357     fc.func = fp;
19358     fc.rettv = rettv;
19359     rettv->vval.v_number = 0;
19360     fc.linenr = 0;
19361     fc.returned = FALSE;
19362     fc.level = ex_nesting_level;
19363     /* Check if this function has a breakpoint. */
19364     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
19365     fc.dbg_tick = debug_tick;
19366 
19367     /*
19368      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
19369      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
19370      * each argument variable and saves a lot of time.
19371      */
19372     /*
19373      * Init l: variables.
19374      */
19375     init_var_dict(&fc.l_vars, &fc.l_vars_var);
19376     if (selfdict != NULL)
19377     {
19378 	/* Set l:self to "selfdict".  Use "name" to avoid a warning from
19379 	 * some compiler that checks the destination size. */
19380 	v = &fc.fixvar[fixvar_idx++].var;
19381 	name = v->di_key;
19382 	STRCPY(name, "self");
19383 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
19384 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
19385 	v->di_tv.v_type = VAR_DICT;
19386 	v->di_tv.v_lock = 0;
19387 	v->di_tv.vval.v_dict = selfdict;
19388 	++selfdict->dv_refcount;
19389     }
19390 
19391     /*
19392      * Init a: variables.
19393      * Set a:0 to "argcount".
19394      * Set a:000 to a list with room for the "..." arguments.
19395      */
19396     init_var_dict(&fc.l_avars, &fc.l_avars_var);
19397     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
19398 				(varnumber_T)(argcount - fp->uf_args.ga_len));
19399     v = &fc.fixvar[fixvar_idx++].var;
19400     STRCPY(v->di_key, "000");
19401     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19402     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19403     v->di_tv.v_type = VAR_LIST;
19404     v->di_tv.v_lock = VAR_FIXED;
19405     v->di_tv.vval.v_list = &fc.l_varlist;
19406     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
19407     fc.l_varlist.lv_refcount = 99999;
19408 
19409     /*
19410      * Set a:firstline to "firstline" and a:lastline to "lastline".
19411      * Set a:name to named arguments.
19412      * Set a:N to the "..." arguments.
19413      */
19414     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
19415 						      (varnumber_T)firstline);
19416     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
19417 						       (varnumber_T)lastline);
19418     for (i = 0; i < argcount; ++i)
19419     {
19420 	ai = i - fp->uf_args.ga_len;
19421 	if (ai < 0)
19422 	    /* named argument a:name */
19423 	    name = FUNCARG(fp, i);
19424 	else
19425 	{
19426 	    /* "..." argument a:1, a:2, etc. */
19427 	    sprintf((char *)numbuf, "%d", ai + 1);
19428 	    name = numbuf;
19429 	}
19430 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
19431 	{
19432 	    v = &fc.fixvar[fixvar_idx++].var;
19433 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19434 	}
19435 	else
19436 	{
19437 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
19438 							     + STRLEN(name)));
19439 	    if (v == NULL)
19440 		break;
19441 	    v->di_flags = DI_FLAGS_RO;
19442 	}
19443 	STRCPY(v->di_key, name);
19444 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19445 
19446 	/* Note: the values are copied directly to avoid alloc/free.
19447 	 * "argvars" must have VAR_FIXED for v_lock. */
19448 	v->di_tv = argvars[i];
19449 	v->di_tv.v_lock = VAR_FIXED;
19450 
19451 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
19452 	{
19453 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
19454 	    fc.l_listitems[ai].li_tv = argvars[i];
19455 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
19456 	}
19457     }
19458 
19459     /* Don't redraw while executing the function. */
19460     ++RedrawingDisabled;
19461     save_sourcing_name = sourcing_name;
19462     save_sourcing_lnum = sourcing_lnum;
19463     sourcing_lnum = 1;
19464     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
19465 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
19466     if (sourcing_name != NULL)
19467     {
19468 	if (save_sourcing_name != NULL
19469 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
19470 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
19471 	else
19472 	    STRCPY(sourcing_name, "function ");
19473 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
19474 
19475 	if (p_verbose >= 12)
19476 	{
19477 	    ++no_wait_return;
19478 	    verbose_enter_scroll();
19479 
19480 	    smsg((char_u *)_("calling %s"), sourcing_name);
19481 	    if (p_verbose >= 14)
19482 	    {
19483 		char_u	buf[MSG_BUF_LEN];
19484 		char_u	numbuf[NUMBUFLEN];
19485 		char_u	*tofree;
19486 
19487 		msg_puts((char_u *)"(");
19488 		for (i = 0; i < argcount; ++i)
19489 		{
19490 		    if (i > 0)
19491 			msg_puts((char_u *)", ");
19492 		    if (argvars[i].v_type == VAR_NUMBER)
19493 			msg_outnum((long)argvars[i].vval.v_number);
19494 		    else
19495 		    {
19496 			trunc_string(tv2string(&argvars[i], &tofree, numbuf, 0),
19497 							    buf, MSG_BUF_CLEN);
19498 			msg_puts(buf);
19499 			vim_free(tofree);
19500 		    }
19501 		}
19502 		msg_puts((char_u *)")");
19503 	    }
19504 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
19505 
19506 	    verbose_leave_scroll();
19507 	    --no_wait_return;
19508 	}
19509     }
19510 #ifdef FEAT_PROFILE
19511     if (do_profiling == PROF_YES)
19512     {
19513 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
19514 	    func_do_profile(fp);
19515 	if (fp->uf_profiling
19516 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
19517 	{
19518 	    ++fp->uf_tm_count;
19519 	    profile_start(&fp->uf_tm_start);
19520 	    profile_zero(&fp->uf_tm_children);
19521 	}
19522 	script_prof_save(&wait_start);
19523     }
19524 #endif
19525 
19526     save_current_SID = current_SID;
19527     current_SID = fp->uf_script_ID;
19528     save_did_emsg = did_emsg;
19529     did_emsg = FALSE;
19530 
19531     /* call do_cmdline() to execute the lines */
19532     do_cmdline(NULL, get_func_line, (void *)&fc,
19533 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
19534 
19535     --RedrawingDisabled;
19536 
19537     /* when the function was aborted because of an error, return -1 */
19538     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
19539     {
19540 	clear_tv(rettv);
19541 	rettv->v_type = VAR_NUMBER;
19542 	rettv->vval.v_number = -1;
19543     }
19544 
19545 #ifdef FEAT_PROFILE
19546     if (do_profiling == PROF_YES && (fp->uf_profiling
19547 		    || (fc.caller != NULL && &fc.caller->func->uf_profiling)))
19548     {
19549 	profile_end(&fp->uf_tm_start);
19550 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
19551 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
19552 	profile_self(&fp->uf_tm_self, &fp->uf_tm_start, &fp->uf_tm_children);
19553 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
19554 	{
19555 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
19556 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
19557 	}
19558     }
19559 #endif
19560 
19561     /* when being verbose, mention the return value */
19562     if (p_verbose >= 12)
19563     {
19564 	++no_wait_return;
19565 	verbose_enter_scroll();
19566 
19567 	if (aborting())
19568 	    smsg((char_u *)_("%s aborted"), sourcing_name);
19569 	else if (fc.rettv->v_type == VAR_NUMBER)
19570 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
19571 					       (long)fc.rettv->vval.v_number);
19572 	else
19573 	{
19574 	    char_u	buf[MSG_BUF_LEN];
19575 	    char_u	numbuf[NUMBUFLEN];
19576 	    char_u	*tofree;
19577 
19578 	    /* The value may be very long.  Skip the middle part, so that we
19579 	     * have some idea how it starts and ends. smsg() would always
19580 	     * truncate it at the end. */
19581 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf, 0),
19582 							   buf, MSG_BUF_CLEN);
19583 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
19584 	    vim_free(tofree);
19585 	}
19586 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19587 
19588 	verbose_leave_scroll();
19589 	--no_wait_return;
19590     }
19591 
19592     vim_free(sourcing_name);
19593     sourcing_name = save_sourcing_name;
19594     sourcing_lnum = save_sourcing_lnum;
19595     current_SID = save_current_SID;
19596 #ifdef FEAT_PROFILE
19597     if (do_profiling == PROF_YES)
19598 	script_prof_restore(&wait_start);
19599 #endif
19600 
19601     if (p_verbose >= 12 && sourcing_name != NULL)
19602     {
19603 	++no_wait_return;
19604 	verbose_enter_scroll();
19605 
19606 	smsg((char_u *)_("continuing in %s"), sourcing_name);
19607 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19608 
19609 	verbose_leave_scroll();
19610 	--no_wait_return;
19611     }
19612 
19613     did_emsg |= save_did_emsg;
19614     current_funccal = fc.caller;
19615 
19616     /* The a: variables typevals were not alloced, only free the allocated
19617      * variables. */
19618     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
19619 
19620     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
19621     --depth;
19622 }
19623 
19624 /*
19625  * Add a number variable "name" to dict "dp" with value "nr".
19626  */
19627     static void
19628 add_nr_var(dp, v, name, nr)
19629     dict_T	*dp;
19630     dictitem_T	*v;
19631     char	*name;
19632     varnumber_T nr;
19633 {
19634     STRCPY(v->di_key, name);
19635     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19636     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
19637     v->di_tv.v_type = VAR_NUMBER;
19638     v->di_tv.v_lock = VAR_FIXED;
19639     v->di_tv.vval.v_number = nr;
19640 }
19641 
19642 /*
19643  * ":return [expr]"
19644  */
19645     void
19646 ex_return(eap)
19647     exarg_T	*eap;
19648 {
19649     char_u	*arg = eap->arg;
19650     typval_T	rettv;
19651     int		returning = FALSE;
19652 
19653     if (current_funccal == NULL)
19654     {
19655 	EMSG(_("E133: :return not inside a function"));
19656 	return;
19657     }
19658 
19659     if (eap->skip)
19660 	++emsg_skip;
19661 
19662     eap->nextcmd = NULL;
19663     if ((*arg != NUL && *arg != '|' && *arg != '\n')
19664 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
19665     {
19666 	if (!eap->skip)
19667 	    returning = do_return(eap, FALSE, TRUE, &rettv);
19668 	else
19669 	    clear_tv(&rettv);
19670     }
19671     /* It's safer to return also on error. */
19672     else if (!eap->skip)
19673     {
19674 	/*
19675 	 * Return unless the expression evaluation has been cancelled due to an
19676 	 * aborting error, an interrupt, or an exception.
19677 	 */
19678 	if (!aborting())
19679 	    returning = do_return(eap, FALSE, TRUE, NULL);
19680     }
19681 
19682     /* When skipping or the return gets pending, advance to the next command
19683      * in this line (!returning).  Otherwise, ignore the rest of the line.
19684      * Following lines will be ignored by get_func_line(). */
19685     if (returning)
19686 	eap->nextcmd = NULL;
19687     else if (eap->nextcmd == NULL)	    /* no argument */
19688 	eap->nextcmd = check_nextcmd(arg);
19689 
19690     if (eap->skip)
19691 	--emsg_skip;
19692 }
19693 
19694 /*
19695  * Return from a function.  Possibly makes the return pending.  Also called
19696  * for a pending return at the ":endtry" or after returning from an extra
19697  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
19698  * when called due to a ":return" command.  "rettv" may point to a typval_T
19699  * with the return rettv.  Returns TRUE when the return can be carried out,
19700  * FALSE when the return gets pending.
19701  */
19702     int
19703 do_return(eap, reanimate, is_cmd, rettv)
19704     exarg_T	*eap;
19705     int		reanimate;
19706     int		is_cmd;
19707     void	*rettv;
19708 {
19709     int		idx;
19710     struct condstack *cstack = eap->cstack;
19711 
19712     if (reanimate)
19713 	/* Undo the return. */
19714 	current_funccal->returned = FALSE;
19715 
19716     /*
19717      * Cleanup (and inactivate) conditionals, but stop when a try conditional
19718      * not in its finally clause (which then is to be executed next) is found.
19719      * In this case, make the ":return" pending for execution at the ":endtry".
19720      * Otherwise, return normally.
19721      */
19722     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
19723     if (idx >= 0)
19724     {
19725 	cstack->cs_pending[idx] = CSTP_RETURN;
19726 
19727 	if (!is_cmd && !reanimate)
19728 	    /* A pending return again gets pending.  "rettv" points to an
19729 	     * allocated variable with the rettv of the original ":return"'s
19730 	     * argument if present or is NULL else. */
19731 	    cstack->cs_rettv[idx] = rettv;
19732 	else
19733 	{
19734 	    /* When undoing a return in order to make it pending, get the stored
19735 	     * return rettv. */
19736 	    if (reanimate)
19737 		rettv = current_funccal->rettv;
19738 
19739 	    if (rettv != NULL)
19740 	    {
19741 		/* Store the value of the pending return. */
19742 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
19743 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
19744 		else
19745 		    EMSG(_(e_outofmem));
19746 	    }
19747 	    else
19748 		cstack->cs_rettv[idx] = NULL;
19749 
19750 	    if (reanimate)
19751 	    {
19752 		/* The pending return value could be overwritten by a ":return"
19753 		 * without argument in a finally clause; reset the default
19754 		 * return value. */
19755 		current_funccal->rettv->v_type = VAR_NUMBER;
19756 		current_funccal->rettv->vval.v_number = 0;
19757 	    }
19758 	}
19759 	report_make_pending(CSTP_RETURN, rettv);
19760     }
19761     else
19762     {
19763 	current_funccal->returned = TRUE;
19764 
19765 	/* If the return is carried out now, store the return value.  For
19766 	 * a return immediately after reanimation, the value is already
19767 	 * there. */
19768 	if (!reanimate && rettv != NULL)
19769 	{
19770 	    clear_tv(current_funccal->rettv);
19771 	    *current_funccal->rettv = *(typval_T *)rettv;
19772 	    if (!is_cmd)
19773 		vim_free(rettv);
19774 	}
19775     }
19776 
19777     return idx < 0;
19778 }
19779 
19780 /*
19781  * Free the variable with a pending return value.
19782  */
19783     void
19784 discard_pending_return(rettv)
19785     void	*rettv;
19786 {
19787     free_tv((typval_T *)rettv);
19788 }
19789 
19790 /*
19791  * Generate a return command for producing the value of "rettv".  The result
19792  * is an allocated string.  Used by report_pending() for verbose messages.
19793  */
19794     char_u *
19795 get_return_cmd(rettv)
19796     void	*rettv;
19797 {
19798     char_u	*s = NULL;
19799     char_u	*tofree = NULL;
19800     char_u	numbuf[NUMBUFLEN];
19801 
19802     if (rettv != NULL)
19803 	s = echo_string((typval_T *)rettv, &tofree, numbuf, 0);
19804     if (s == NULL)
19805 	s = (char_u *)"";
19806 
19807     STRCPY(IObuff, ":return ");
19808     STRNCPY(IObuff + 8, s, IOSIZE - 8);
19809     if (STRLEN(s) + 8 >= IOSIZE)
19810 	STRCPY(IObuff + IOSIZE - 4, "...");
19811     vim_free(tofree);
19812     return vim_strsave(IObuff);
19813 }
19814 
19815 /*
19816  * Get next function line.
19817  * Called by do_cmdline() to get the next line.
19818  * Returns allocated string, or NULL for end of function.
19819  */
19820 /* ARGSUSED */
19821     char_u *
19822 get_func_line(c, cookie, indent)
19823     int	    c;		    /* not used */
19824     void    *cookie;
19825     int	    indent;	    /* not used */
19826 {
19827     funccall_T	*fcp = (funccall_T *)cookie;
19828     ufunc_T	*fp = fcp->func;
19829     char_u	*retval;
19830     garray_T	*gap;  /* growarray with function lines */
19831 
19832     /* If breakpoints have been added/deleted need to check for it. */
19833     if (fcp->dbg_tick != debug_tick)
19834     {
19835 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
19836 							       sourcing_lnum);
19837 	fcp->dbg_tick = debug_tick;
19838     }
19839 #ifdef FEAT_PROFILE
19840     if (do_profiling == PROF_YES)
19841 	func_line_end(cookie);
19842 #endif
19843 
19844     gap = &fp->uf_lines;
19845     if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
19846 	    || fcp->returned)
19847 	retval = NULL;
19848     else
19849     {
19850 	/* Skip NULL lines (continuation lines). */
19851 	while (fcp->linenr < gap->ga_len
19852 			  && ((char_u **)(gap->ga_data))[fcp->linenr] == NULL)
19853 	    ++fcp->linenr;
19854 	if (fcp->linenr >= gap->ga_len)
19855 	    retval = NULL;
19856 	else
19857 	{
19858 	    retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
19859 	    sourcing_lnum = fcp->linenr;
19860 #ifdef FEAT_PROFILE
19861 	    if (do_profiling == PROF_YES)
19862 		func_line_start(cookie);
19863 #endif
19864 	}
19865     }
19866 
19867     /* Did we encounter a breakpoint? */
19868     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
19869     {
19870 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
19871 	/* Find next breakpoint. */
19872 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
19873 							       sourcing_lnum);
19874 	fcp->dbg_tick = debug_tick;
19875     }
19876 
19877     return retval;
19878 }
19879 
19880 #if defined(FEAT_PROFILE) || defined(PROTO)
19881 /*
19882  * Called when starting to read a function line.
19883  * "sourcing_lnum" must be correct!
19884  * When skipping lines it may not actually be executed, but we won't find out
19885  * until later and we need to store the time now.
19886  */
19887     void
19888 func_line_start(cookie)
19889     void    *cookie;
19890 {
19891     funccall_T	*fcp = (funccall_T *)cookie;
19892     ufunc_T	*fp = fcp->func;
19893 
19894     if (fp->uf_profiling && sourcing_lnum >= 1
19895 				      && sourcing_lnum <= fp->uf_lines.ga_len)
19896     {
19897 	fp->uf_tml_idx = sourcing_lnum - 1;
19898 	/* Skip continuation lines. */
19899 	while (fp->uf_tml_idx > 0 && FUNCLINE(fp, fp->uf_tml_idx) == NULL)
19900 	    --fp->uf_tml_idx;
19901 	fp->uf_tml_execed = FALSE;
19902 	profile_start(&fp->uf_tml_start);
19903 	profile_zero(&fp->uf_tml_children);
19904 	profile_get_wait(&fp->uf_tml_wait);
19905     }
19906 }
19907 
19908 /*
19909  * Called when actually executing a function line.
19910  */
19911     void
19912 func_line_exec(cookie)
19913     void    *cookie;
19914 {
19915     funccall_T	*fcp = (funccall_T *)cookie;
19916     ufunc_T	*fp = fcp->func;
19917 
19918     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
19919 	fp->uf_tml_execed = TRUE;
19920 }
19921 
19922 /*
19923  * Called when done with a function line.
19924  */
19925     void
19926 func_line_end(cookie)
19927     void    *cookie;
19928 {
19929     funccall_T	*fcp = (funccall_T *)cookie;
19930     ufunc_T	*fp = fcp->func;
19931 
19932     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
19933     {
19934 	if (fp->uf_tml_execed)
19935 	{
19936 	    ++fp->uf_tml_count[fp->uf_tml_idx];
19937 	    profile_end(&fp->uf_tml_start);
19938 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
19939 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
19940 	    profile_self(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start,
19941 							&fp->uf_tml_children);
19942 	}
19943 	fp->uf_tml_idx = -1;
19944     }
19945 }
19946 #endif
19947 
19948 /*
19949  * Return TRUE if the currently active function should be ended, because a
19950  * return was encountered or an error occured.  Used inside a ":while".
19951  */
19952     int
19953 func_has_ended(cookie)
19954     void    *cookie;
19955 {
19956     funccall_T  *fcp = (funccall_T *)cookie;
19957 
19958     /* Ignore the "abort" flag if the abortion behavior has been changed due to
19959      * an error inside a try conditional. */
19960     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
19961 	    || fcp->returned);
19962 }
19963 
19964 /*
19965  * return TRUE if cookie indicates a function which "abort"s on errors.
19966  */
19967     int
19968 func_has_abort(cookie)
19969     void    *cookie;
19970 {
19971     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
19972 }
19973 
19974 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
19975 typedef enum
19976 {
19977     VAR_FLAVOUR_DEFAULT,
19978     VAR_FLAVOUR_SESSION,
19979     VAR_FLAVOUR_VIMINFO
19980 } var_flavour_T;
19981 
19982 static var_flavour_T var_flavour __ARGS((char_u *varname));
19983 
19984     static var_flavour_T
19985 var_flavour(varname)
19986     char_u *varname;
19987 {
19988     char_u *p = varname;
19989 
19990     if (ASCII_ISUPPER(*p))
19991     {
19992 	while (*(++p))
19993 	    if (ASCII_ISLOWER(*p))
19994 		return VAR_FLAVOUR_SESSION;
19995 	return VAR_FLAVOUR_VIMINFO;
19996     }
19997     else
19998 	return VAR_FLAVOUR_DEFAULT;
19999 }
20000 #endif
20001 
20002 #if defined(FEAT_VIMINFO) || defined(PROTO)
20003 /*
20004  * Restore global vars that start with a capital from the viminfo file
20005  */
20006     int
20007 read_viminfo_varlist(virp, writing)
20008     vir_T	*virp;
20009     int		writing;
20010 {
20011     char_u	*tab;
20012     int		is_string = FALSE;
20013     typval_T	tv;
20014 
20015     if (!writing && (find_viminfo_parameter('!') != NULL))
20016     {
20017 	tab = vim_strchr(virp->vir_line + 1, '\t');
20018 	if (tab != NULL)
20019 	{
20020 	    *tab++ = '\0';	/* isolate the variable name */
20021 	    if (*tab == 'S')	/* string var */
20022 		is_string = TRUE;
20023 
20024 	    tab = vim_strchr(tab, '\t');
20025 	    if (tab != NULL)
20026 	    {
20027 		if (is_string)
20028 		{
20029 		    tv.v_type = VAR_STRING;
20030 		    tv.vval.v_string = viminfo_readstring(virp,
20031 				       (int)(tab - virp->vir_line + 1), TRUE);
20032 		}
20033 		else
20034 		{
20035 		    tv.v_type = VAR_NUMBER;
20036 		    tv.vval.v_number = atol((char *)tab + 1);
20037 		}
20038 		set_var(virp->vir_line + 1, &tv, FALSE);
20039 		if (is_string)
20040 		    vim_free(tv.vval.v_string);
20041 	    }
20042 	}
20043     }
20044 
20045     return viminfo_readline(virp);
20046 }
20047 
20048 /*
20049  * Write global vars that start with a capital to the viminfo file
20050  */
20051     void
20052 write_viminfo_varlist(fp)
20053     FILE    *fp;
20054 {
20055     hashitem_T	*hi;
20056     dictitem_T	*this_var;
20057     int		todo;
20058     char	*s;
20059     char_u	*p;
20060     char_u	*tofree;
20061     char_u	numbuf[NUMBUFLEN];
20062 
20063     if (find_viminfo_parameter('!') == NULL)
20064 	return;
20065 
20066     fprintf(fp, _("\n# global variables:\n"));
20067 
20068     todo = globvarht.ht_used;
20069     for (hi = globvarht.ht_array; todo > 0; ++hi)
20070     {
20071 	if (!HASHITEM_EMPTY(hi))
20072 	{
20073 	    --todo;
20074 	    this_var = HI2DI(hi);
20075 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
20076 	    {
20077 		switch (this_var->di_tv.v_type)
20078 		{
20079 		    case VAR_STRING: s = "STR"; break;
20080 		    case VAR_NUMBER: s = "NUM"; break;
20081 		    default: continue;
20082 		}
20083 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
20084 		p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
20085 		if (p != NULL)
20086 		    viminfo_writestring(fp, p);
20087 		vim_free(tofree);
20088 	    }
20089 	}
20090     }
20091 }
20092 #endif
20093 
20094 #if defined(FEAT_SESSION) || defined(PROTO)
20095     int
20096 store_session_globals(fd)
20097     FILE	*fd;
20098 {
20099     hashitem_T	*hi;
20100     dictitem_T	*this_var;
20101     int		todo;
20102     char_u	*p, *t;
20103 
20104     todo = globvarht.ht_used;
20105     for (hi = globvarht.ht_array; todo > 0; ++hi)
20106     {
20107 	if (!HASHITEM_EMPTY(hi))
20108 	{
20109 	    --todo;
20110 	    this_var = HI2DI(hi);
20111 	    if ((this_var->di_tv.v_type == VAR_NUMBER
20112 			|| this_var->di_tv.v_type == VAR_STRING)
20113 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
20114 	    {
20115 		/* Escape special characters with a backslash.  Turn a LF and
20116 		 * CR into \n and \r. */
20117 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
20118 							(char_u *)"\\\"\n\r");
20119 		if (p == NULL)	    /* out of memory */
20120 		    break;
20121 		for (t = p; *t != NUL; ++t)
20122 		    if (*t == '\n')
20123 			*t = 'n';
20124 		    else if (*t == '\r')
20125 			*t = 'r';
20126 		if ((fprintf(fd, "let %s = %c%s%c",
20127 				this_var->di_key,
20128 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
20129 									: ' ',
20130 				p,
20131 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
20132 								   : ' ') < 0)
20133 			|| put_eol(fd) == FAIL)
20134 		{
20135 		    vim_free(p);
20136 		    return FAIL;
20137 		}
20138 		vim_free(p);
20139 	    }
20140 	}
20141     }
20142     return OK;
20143 }
20144 #endif
20145 
20146 /*
20147  * Display script name where an item was last set.
20148  * Should only be invoked when 'verbose' is non-zero.
20149  */
20150     void
20151 last_set_msg(scriptID)
20152     scid_T scriptID;
20153 {
20154     char_u *p;
20155 
20156     if (scriptID != 0)
20157     {
20158 	p = home_replace_save(NULL, get_scriptname(scriptID));
20159 	if (p != NULL)
20160 	{
20161 	    verbose_enter();
20162 	    MSG_PUTS(_("\n\tLast set from "));
20163 	    MSG_PUTS(p);
20164 	    vim_free(p);
20165 	    verbose_leave();
20166 	}
20167     }
20168 }
20169 
20170 #endif /* FEAT_EVAL */
20171 
20172 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
20173 
20174 
20175 #ifdef WIN3264
20176 /*
20177  * Functions for ":8" filename modifier: get 8.3 version of a filename.
20178  */
20179 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
20180 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
20181 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
20182 
20183 /*
20184  * Get the short pathname of a file.
20185  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
20186  */
20187     static int
20188 get_short_pathname(fnamep, bufp, fnamelen)
20189     char_u	**fnamep;
20190     char_u	**bufp;
20191     int		*fnamelen;
20192 {
20193     int		l,len;
20194     char_u	*newbuf;
20195 
20196     len = *fnamelen;
20197 
20198     l = GetShortPathName(*fnamep, *fnamep, len);
20199     if (l > len - 1)
20200     {
20201 	/* If that doesn't work (not enough space), then save the string
20202 	 * and try again with a new buffer big enough
20203 	 */
20204 	newbuf = vim_strnsave(*fnamep, l);
20205 	if (newbuf == NULL)
20206 	    return 0;
20207 
20208 	vim_free(*bufp);
20209 	*fnamep = *bufp = newbuf;
20210 
20211 	l = GetShortPathName(*fnamep,*fnamep,l+1);
20212 
20213 	/* Really should always succeed, as the buffer is big enough */
20214     }
20215 
20216     *fnamelen = l;
20217     return 1;
20218 }
20219 
20220 /*
20221  * Create a short path name.  Returns the length of the buffer it needs.
20222  * Doesn't copy over the end of the buffer passed in.
20223  */
20224     static int
20225 shortpath_for_invalid_fname(fname, bufp, fnamelen)
20226     char_u	**fname;
20227     char_u	**bufp;
20228     int		*fnamelen;
20229 {
20230     char_u	*s, *p, *pbuf2, *pbuf3;
20231     char_u	ch;
20232     int		len, len2, plen, slen;
20233 
20234     /* Make a copy */
20235     len2 = *fnamelen;
20236     pbuf2 = vim_strnsave(*fname, len2);
20237     pbuf3 = NULL;
20238 
20239     s = pbuf2 + len2 - 1; /* Find the end */
20240     slen = 1;
20241     plen = len2;
20242 
20243     if (after_pathsep(pbuf2, s + 1))
20244     {
20245 	--s;
20246 	++slen;
20247 	--plen;
20248     }
20249 
20250     do
20251     {
20252 	/* Go back one path-seperator */
20253 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
20254 	{
20255 	    --s;
20256 	    ++slen;
20257 	    --plen;
20258 	}
20259 	if (s <= pbuf2)
20260 	    break;
20261 
20262 	/* Remeber the character that is about to be blatted */
20263 	ch = *s;
20264 	*s = 0; /* get_short_pathname requires a null-terminated string */
20265 
20266 	/* Try it in situ */
20267 	p = pbuf2;
20268 	if (!get_short_pathname(&p, &pbuf3, &plen))
20269 	{
20270 	    vim_free(pbuf2);
20271 	    return -1;
20272 	}
20273 	*s = ch;    /* Preserve the string */
20274     } while (plen == 0);
20275 
20276     if (plen > 0)
20277     {
20278 	/* Remeber the length of the new string.  */
20279 	*fnamelen = len = plen + slen;
20280 	vim_free(*bufp);
20281 	if (len > len2)
20282 	{
20283 	    /* If there's not enough space in the currently allocated string,
20284 	     * then copy it to a buffer big enough.
20285 	     */
20286 	    *fname= *bufp = vim_strnsave(p, len);
20287 	    if (*fname == NULL)
20288 		return -1;
20289 	}
20290 	else
20291 	{
20292 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
20293 	    *fname = *bufp = pbuf2;
20294 	    if (p != pbuf2)
20295 		strncpy(*fname, p, plen);
20296 	    pbuf2 = NULL;
20297 	}
20298 	/* Concat the next bit */
20299 	strncpy(*fname + plen, s, slen);
20300 	(*fname)[len] = '\0';
20301     }
20302     vim_free(pbuf3);
20303     vim_free(pbuf2);
20304     return 0;
20305 }
20306 
20307 /*
20308  * Get a pathname for a partial path.
20309  */
20310     static int
20311 shortpath_for_partial(fnamep, bufp, fnamelen)
20312     char_u	**fnamep;
20313     char_u	**bufp;
20314     int		*fnamelen;
20315 {
20316     int		sepcount, len, tflen;
20317     char_u	*p;
20318     char_u	*pbuf, *tfname;
20319     int		hasTilde;
20320 
20321     /* Count up the path seperators from the RHS.. so we know which part
20322      * of the path to return.
20323      */
20324     sepcount = 0;
20325     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
20326 	if (vim_ispathsep(*p))
20327 	    ++sepcount;
20328 
20329     /* Need full path first (use expand_env() to remove a "~/") */
20330     hasTilde = (**fnamep == '~');
20331     if (hasTilde)
20332 	pbuf = tfname = expand_env_save(*fnamep);
20333     else
20334 	pbuf = tfname = FullName_save(*fnamep, FALSE);
20335 
20336     len = tflen = STRLEN(tfname);
20337 
20338     if (!get_short_pathname(&tfname, &pbuf, &len))
20339 	return -1;
20340 
20341     if (len == 0)
20342     {
20343 	/* Don't have a valid filename, so shorten the rest of the
20344 	 * path if we can. This CAN give us invalid 8.3 filenames, but
20345 	 * there's not a lot of point in guessing what it might be.
20346 	 */
20347 	len = tflen;
20348 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
20349 	    return -1;
20350     }
20351 
20352     /* Count the paths backward to find the beginning of the desired string. */
20353     for (p = tfname + len - 1; p >= tfname; --p)
20354     {
20355 #ifdef FEAT_MBYTE
20356 	if (has_mbyte)
20357 	    p -= mb_head_off(tfname, p);
20358 #endif
20359 	if (vim_ispathsep(*p))
20360 	{
20361 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
20362 		break;
20363 	    else
20364 		sepcount --;
20365 	}
20366     }
20367     if (hasTilde)
20368     {
20369 	--p;
20370 	if (p >= tfname)
20371 	    *p = '~';
20372 	else
20373 	    return -1;
20374     }
20375     else
20376 	++p;
20377 
20378     /* Copy in the string - p indexes into tfname - allocated at pbuf */
20379     vim_free(*bufp);
20380     *fnamelen = (int)STRLEN(p);
20381     *bufp = pbuf;
20382     *fnamep = p;
20383 
20384     return 0;
20385 }
20386 #endif /* WIN3264 */
20387 
20388 /*
20389  * Adjust a filename, according to a string of modifiers.
20390  * *fnamep must be NUL terminated when called.  When returning, the length is
20391  * determined by *fnamelen.
20392  * Returns valid flags.
20393  * When there is an error, *fnamep is set to NULL.
20394  */
20395     int
20396 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
20397     char_u	*src;		/* string with modifiers */
20398     int		*usedlen;	/* characters after src that are used */
20399     char_u	**fnamep;	/* file name so far */
20400     char_u	**bufp;		/* buffer for allocated file name or NULL */
20401     int		*fnamelen;	/* length of fnamep */
20402 {
20403     int		valid = 0;
20404     char_u	*tail;
20405     char_u	*s, *p, *pbuf;
20406     char_u	dirname[MAXPATHL];
20407     int		c;
20408     int		has_fullname = 0;
20409 #ifdef WIN3264
20410     int		has_shortname = 0;
20411 #endif
20412 
20413 repeat:
20414     /* ":p" - full path/file_name */
20415     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
20416     {
20417 	has_fullname = 1;
20418 
20419 	valid |= VALID_PATH;
20420 	*usedlen += 2;
20421 
20422 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
20423 	if ((*fnamep)[0] == '~'
20424 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
20425 		&& ((*fnamep)[1] == '/'
20426 # ifdef BACKSLASH_IN_FILENAME
20427 		    || (*fnamep)[1] == '\\'
20428 # endif
20429 		    || (*fnamep)[1] == NUL)
20430 
20431 #endif
20432 	   )
20433 	{
20434 	    *fnamep = expand_env_save(*fnamep);
20435 	    vim_free(*bufp);	/* free any allocated file name */
20436 	    *bufp = *fnamep;
20437 	    if (*fnamep == NULL)
20438 		return -1;
20439 	}
20440 
20441 	/* When "/." or "/.." is used: force expansion to get rid of it. */
20442 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
20443 	{
20444 	    if (vim_ispathsep(*p)
20445 		    && p[1] == '.'
20446 		    && (p[2] == NUL
20447 			|| vim_ispathsep(p[2])
20448 			|| (p[2] == '.'
20449 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
20450 		break;
20451 	}
20452 
20453 	/* FullName_save() is slow, don't use it when not needed. */
20454 	if (*p != NUL || !vim_isAbsName(*fnamep))
20455 	{
20456 	    *fnamep = FullName_save(*fnamep, *p != NUL);
20457 	    vim_free(*bufp);	/* free any allocated file name */
20458 	    *bufp = *fnamep;
20459 	    if (*fnamep == NULL)
20460 		return -1;
20461 	}
20462 
20463 	/* Append a path separator to a directory. */
20464 	if (mch_isdir(*fnamep))
20465 	{
20466 	    /* Make room for one or two extra characters. */
20467 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
20468 	    vim_free(*bufp);	/* free any allocated file name */
20469 	    *bufp = *fnamep;
20470 	    if (*fnamep == NULL)
20471 		return -1;
20472 	    add_pathsep(*fnamep);
20473 	}
20474     }
20475 
20476     /* ":." - path relative to the current directory */
20477     /* ":~" - path relative to the home directory */
20478     /* ":8" - shortname path - postponed till after */
20479     while (src[*usedlen] == ':'
20480 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
20481     {
20482 	*usedlen += 2;
20483 	if (c == '8')
20484 	{
20485 #ifdef WIN3264
20486 	    has_shortname = 1; /* Postpone this. */
20487 #endif
20488 	    continue;
20489 	}
20490 	pbuf = NULL;
20491 	/* Need full path first (use expand_env() to remove a "~/") */
20492 	if (!has_fullname)
20493 	{
20494 	    if (c == '.' && **fnamep == '~')
20495 		p = pbuf = expand_env_save(*fnamep);
20496 	    else
20497 		p = pbuf = FullName_save(*fnamep, FALSE);
20498 	}
20499 	else
20500 	    p = *fnamep;
20501 
20502 	has_fullname = 0;
20503 
20504 	if (p != NULL)
20505 	{
20506 	    if (c == '.')
20507 	    {
20508 		mch_dirname(dirname, MAXPATHL);
20509 		s = shorten_fname(p, dirname);
20510 		if (s != NULL)
20511 		{
20512 		    *fnamep = s;
20513 		    if (pbuf != NULL)
20514 		    {
20515 			vim_free(*bufp);   /* free any allocated file name */
20516 			*bufp = pbuf;
20517 			pbuf = NULL;
20518 		    }
20519 		}
20520 	    }
20521 	    else
20522 	    {
20523 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
20524 		/* Only replace it when it starts with '~' */
20525 		if (*dirname == '~')
20526 		{
20527 		    s = vim_strsave(dirname);
20528 		    if (s != NULL)
20529 		    {
20530 			*fnamep = s;
20531 			vim_free(*bufp);
20532 			*bufp = s;
20533 		    }
20534 		}
20535 	    }
20536 	    vim_free(pbuf);
20537 	}
20538     }
20539 
20540     tail = gettail(*fnamep);
20541     *fnamelen = (int)STRLEN(*fnamep);
20542 
20543     /* ":h" - head, remove "/file_name", can be repeated  */
20544     /* Don't remove the first "/" or "c:\" */
20545     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
20546     {
20547 	valid |= VALID_HEAD;
20548 	*usedlen += 2;
20549 	s = get_past_head(*fnamep);
20550 	while (tail > s && after_pathsep(s, tail))
20551 	    --tail;
20552 	*fnamelen = (int)(tail - *fnamep);
20553 #ifdef VMS
20554 	if (*fnamelen > 0)
20555 	    *fnamelen += 1; /* the path separator is part of the path */
20556 #endif
20557 	while (tail > s && !after_pathsep(s, tail))
20558 	    mb_ptr_back(*fnamep, tail);
20559     }
20560 
20561     /* ":8" - shortname  */
20562     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
20563     {
20564 	*usedlen += 2;
20565 #ifdef WIN3264
20566 	has_shortname = 1;
20567 #endif
20568     }
20569 
20570 #ifdef WIN3264
20571     /* Check shortname after we have done 'heads' and before we do 'tails'
20572      */
20573     if (has_shortname)
20574     {
20575 	pbuf = NULL;
20576 	/* Copy the string if it is shortened by :h */
20577 	if (*fnamelen < (int)STRLEN(*fnamep))
20578 	{
20579 	    p = vim_strnsave(*fnamep, *fnamelen);
20580 	    if (p == 0)
20581 		return -1;
20582 	    vim_free(*bufp);
20583 	    *bufp = *fnamep = p;
20584 	}
20585 
20586 	/* Split into two implementations - makes it easier.  First is where
20587 	 * there isn't a full name already, second is where there is.
20588 	 */
20589 	if (!has_fullname && !vim_isAbsName(*fnamep))
20590 	{
20591 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
20592 		return -1;
20593 	}
20594 	else
20595 	{
20596 	    int		l;
20597 
20598 	    /* Simple case, already have the full-name
20599 	     * Nearly always shorter, so try first time. */
20600 	    l = *fnamelen;
20601 	    if (!get_short_pathname(fnamep, bufp, &l))
20602 		return -1;
20603 
20604 	    if (l == 0)
20605 	    {
20606 		/* Couldn't find the filename.. search the paths.
20607 		 */
20608 		l = *fnamelen;
20609 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
20610 		    return -1;
20611 	    }
20612 	    *fnamelen = l;
20613 	}
20614     }
20615 #endif /* WIN3264 */
20616 
20617     /* ":t" - tail, just the basename */
20618     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
20619     {
20620 	*usedlen += 2;
20621 	*fnamelen -= (int)(tail - *fnamep);
20622 	*fnamep = tail;
20623     }
20624 
20625     /* ":e" - extension, can be repeated */
20626     /* ":r" - root, without extension, can be repeated */
20627     while (src[*usedlen] == ':'
20628 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
20629     {
20630 	/* find a '.' in the tail:
20631 	 * - for second :e: before the current fname
20632 	 * - otherwise: The last '.'
20633 	 */
20634 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
20635 	    s = *fnamep - 2;
20636 	else
20637 	    s = *fnamep + *fnamelen - 1;
20638 	for ( ; s > tail; --s)
20639 	    if (s[0] == '.')
20640 		break;
20641 	if (src[*usedlen + 1] == 'e')		/* :e */
20642 	{
20643 	    if (s > tail)
20644 	    {
20645 		*fnamelen += (int)(*fnamep - (s + 1));
20646 		*fnamep = s + 1;
20647 #ifdef VMS
20648 		/* cut version from the extension */
20649 		s = *fnamep + *fnamelen - 1;
20650 		for ( ; s > *fnamep; --s)
20651 		    if (s[0] == ';')
20652 			break;
20653 		if (s > *fnamep)
20654 		    *fnamelen = s - *fnamep;
20655 #endif
20656 	    }
20657 	    else if (*fnamep <= tail)
20658 		*fnamelen = 0;
20659 	}
20660 	else				/* :r */
20661 	{
20662 	    if (s > tail)	/* remove one extension */
20663 		*fnamelen = (int)(s - *fnamep);
20664 	}
20665 	*usedlen += 2;
20666     }
20667 
20668     /* ":s?pat?foo?" - substitute */
20669     /* ":gs?pat?foo?" - global substitute */
20670     if (src[*usedlen] == ':'
20671 	    && (src[*usedlen + 1] == 's'
20672 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
20673     {
20674 	char_u	    *str;
20675 	char_u	    *pat;
20676 	char_u	    *sub;
20677 	int	    sep;
20678 	char_u	    *flags;
20679 	int	    didit = FALSE;
20680 
20681 	flags = (char_u *)"";
20682 	s = src + *usedlen + 2;
20683 	if (src[*usedlen + 1] == 'g')
20684 	{
20685 	    flags = (char_u *)"g";
20686 	    ++s;
20687 	}
20688 
20689 	sep = *s++;
20690 	if (sep)
20691 	{
20692 	    /* find end of pattern */
20693 	    p = vim_strchr(s, sep);
20694 	    if (p != NULL)
20695 	    {
20696 		pat = vim_strnsave(s, (int)(p - s));
20697 		if (pat != NULL)
20698 		{
20699 		    s = p + 1;
20700 		    /* find end of substitution */
20701 		    p = vim_strchr(s, sep);
20702 		    if (p != NULL)
20703 		    {
20704 			sub = vim_strnsave(s, (int)(p - s));
20705 			str = vim_strnsave(*fnamep, *fnamelen);
20706 			if (sub != NULL && str != NULL)
20707 			{
20708 			    *usedlen = (int)(p + 1 - src);
20709 			    s = do_string_sub(str, pat, sub, flags);
20710 			    if (s != NULL)
20711 			    {
20712 				*fnamep = s;
20713 				*fnamelen = (int)STRLEN(s);
20714 				vim_free(*bufp);
20715 				*bufp = s;
20716 				didit = TRUE;
20717 			    }
20718 			}
20719 			vim_free(sub);
20720 			vim_free(str);
20721 		    }
20722 		    vim_free(pat);
20723 		}
20724 	    }
20725 	    /* after using ":s", repeat all the modifiers */
20726 	    if (didit)
20727 		goto repeat;
20728 	}
20729     }
20730 
20731     return valid;
20732 }
20733 
20734 /*
20735  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
20736  * "flags" can be "g" to do a global substitute.
20737  * Returns an allocated string, NULL for error.
20738  */
20739     char_u *
20740 do_string_sub(str, pat, sub, flags)
20741     char_u	*str;
20742     char_u	*pat;
20743     char_u	*sub;
20744     char_u	*flags;
20745 {
20746     int		sublen;
20747     regmatch_T	regmatch;
20748     int		i;
20749     int		do_all;
20750     char_u	*tail;
20751     garray_T	ga;
20752     char_u	*ret;
20753     char_u	*save_cpo;
20754 
20755     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
20756     save_cpo = p_cpo;
20757     p_cpo = (char_u *)"";
20758 
20759     ga_init2(&ga, 1, 200);
20760 
20761     do_all = (flags[0] == 'g');
20762 
20763     regmatch.rm_ic = p_ic;
20764     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
20765     if (regmatch.regprog != NULL)
20766     {
20767 	tail = str;
20768 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
20769 	{
20770 	    /*
20771 	     * Get some space for a temporary buffer to do the substitution
20772 	     * into.  It will contain:
20773 	     * - The text up to where the match is.
20774 	     * - The substituted text.
20775 	     * - The text after the match.
20776 	     */
20777 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
20778 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
20779 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
20780 	    {
20781 		ga_clear(&ga);
20782 		break;
20783 	    }
20784 
20785 	    /* copy the text up to where the match is */
20786 	    i = (int)(regmatch.startp[0] - tail);
20787 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
20788 	    /* add the substituted text */
20789 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
20790 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
20791 	    ga.ga_len += i + sublen - 1;
20792 	    /* avoid getting stuck on a match with an empty string */
20793 	    if (tail == regmatch.endp[0])
20794 	    {
20795 		if (*tail == NUL)
20796 		    break;
20797 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
20798 		++ga.ga_len;
20799 	    }
20800 	    else
20801 	    {
20802 		tail = regmatch.endp[0];
20803 		if (*tail == NUL)
20804 		    break;
20805 	    }
20806 	    if (!do_all)
20807 		break;
20808 	}
20809 
20810 	if (ga.ga_data != NULL)
20811 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
20812 
20813 	vim_free(regmatch.regprog);
20814     }
20815 
20816     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
20817     ga_clear(&ga);
20818     p_cpo = save_cpo;
20819 
20820     return ret;
20821 }
20822 
20823 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
20824