xref: /vim-8.2.3635/src/eval.c (revision a3227e2b) 
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 char_u *list_arg_vars __ARGS((exarg_T *eap, char_u *arg));
374 static char_u *ex_let_one __ARGS((char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op));
375 static int check_changedtick __ARGS((char_u *arg));
376 static char_u *get_lval __ARGS((char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int quiet, int fne_flags));
377 static void clear_lval __ARGS((lval_T *lp));
378 static void set_var_lval __ARGS((lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op));
379 static int tv_op __ARGS((typval_T *tv1, typval_T *tv2, char_u  *op));
380 static void list_add_watch __ARGS((list_T *l, listwatch_T *lw));
381 static void list_rem_watch __ARGS((list_T *l, listwatch_T *lwrem));
382 static void list_fix_watch __ARGS((list_T *l, listitem_T *item));
383 static void ex_unletlock __ARGS((exarg_T *eap, char_u *argstart, int deep));
384 static int do_unlet_var __ARGS((lval_T *lp, char_u *name_end, int forceit));
385 static int do_lock_var __ARGS((lval_T *lp, char_u *name_end, int deep, int lock));
386 static void item_lock __ARGS((typval_T *tv, int deep, int lock));
387 static int tv_islocked __ARGS((typval_T *tv));
388 
389 static int eval0 __ARGS((char_u *arg,  typval_T *rettv, char_u **nextcmd, int evaluate));
390 static int eval1 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
391 static int eval2 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
392 static int eval3 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
393 static int eval4 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
394 static int eval5 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
395 static int eval6 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
396 static int eval7 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
397 
398 static int eval_index __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
399 static int get_option_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
400 static int get_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
401 static int get_lit_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
402 static int get_list_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
403 static int rettv_list_alloc __ARGS((typval_T *rettv));
404 static listitem_T *listitem_alloc __ARGS((void));
405 static void listitem_free __ARGS((listitem_T *item));
406 static void listitem_remove __ARGS((list_T *l, listitem_T *item));
407 static long list_len __ARGS((list_T *l));
408 static int list_equal __ARGS((list_T *l1, list_T *l2, int ic));
409 static int dict_equal __ARGS((dict_T *d1, dict_T *d2, int ic));
410 static int tv_equal __ARGS((typval_T *tv1, typval_T *tv2, int ic));
411 static listitem_T *list_find __ARGS((list_T *l, long n));
412 static long list_find_nr __ARGS((list_T *l, long idx, int *errorp));
413 static long list_idx_of_item __ARGS((list_T *l, listitem_T *item));
414 static void list_append __ARGS((list_T *l, listitem_T *item));
415 static int list_append_tv __ARGS((list_T *l, typval_T *tv));
416 static int list_append_string __ARGS((list_T *l, char_u *str, int len));
417 static int list_append_number __ARGS((list_T *l, varnumber_T n));
418 static int list_insert_tv __ARGS((list_T *l, typval_T *tv, listitem_T *item));
419 static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
420 static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
421 static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
422 static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
423 static char_u *list2string __ARGS((typval_T *tv, int copyID));
424 static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo, int copyID));
425 static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
426 static void set_ref_in_list __ARGS((list_T *l, int copyID));
427 static void set_ref_in_item __ARGS((typval_T *tv, int copyID));
428 static void dict_unref __ARGS((dict_T *d));
429 static void dict_free __ARGS((dict_T *d));
430 static dictitem_T *dictitem_alloc __ARGS((char_u *key));
431 static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
432 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
433 static void dictitem_free __ARGS((dictitem_T *item));
434 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
435 static int dict_add __ARGS((dict_T *d, dictitem_T *item));
436 static long dict_len __ARGS((dict_T *d));
437 static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
438 static char_u *dict2string __ARGS((typval_T *tv, int copyID));
439 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
440 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
441 static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
442 static char_u *string_quote __ARGS((char_u *str, int function));
443 static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
444 static int find_internal_func __ARGS((char_u *name));
445 static char_u *deref_func_name __ARGS((char_u *name, int *lenp));
446 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));
447 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));
448 static void emsg_funcname __ARGS((char *msg, char_u *name));
449 
450 static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
451 static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
452 static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
453 static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
454 static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
455 static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
456 static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
457 static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
458 static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
459 static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
460 static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
461 static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
462 static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
463 static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
464 static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
465 static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
466 static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
467 static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
468 static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
469 #if defined(FEAT_INS_EXPAND)
470 static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
472 #endif
473 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
476 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
477 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
478 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
480 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
481 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
482 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
486 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_getcmdtype __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_getpos __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_inputlist __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
558 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
559 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
560 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
561 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
562 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
563 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
564 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
565 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
571 #ifdef vim_mkdir
572 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
573 #endif
574 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_pumvisible __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_searchdecl __ARGS((typval_T *argvars, typval_T *rettv));
594 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
595 static void f_searchpairpos __ARGS((typval_T *argvars, typval_T *rettv));
596 static void f_searchpos __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_setloclist __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_setpos __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
613 #ifdef HAVE_STRFTIME
614 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
615 #endif
616 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_tabpagebuflist __ARGS((typval_T *argvars, typval_T *rettv));
629 static void f_tabpagenr __ARGS((typval_T *argvars, typval_T *rettv));
630 static void f_tabpagewinnr __ARGS((typval_T *argvars, typval_T *rettv));
631 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
632 static void f_tagfiles __ARGS((typval_T *argvars, typval_T *rettv));
633 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
634 static void f_test __ARGS((typval_T *argvars, typval_T *rettv));
635 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
636 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
637 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
638 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
639 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
640 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
641 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
642 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
643 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
644 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
645 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
646 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
647 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
648 static void f_winrestview __ARGS((typval_T *argvars, typval_T *rettv));
649 static void f_winsaveview __ARGS((typval_T *argvars, typval_T *rettv));
650 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
651 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
652 
653 static int list2fpos __ARGS((typval_T *arg, pos_T *posp, int *fnump));
654 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum, int *fnum));
655 static int get_env_len __ARGS((char_u **arg));
656 static int get_id_len __ARGS((char_u **arg));
657 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
658 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
659 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
660 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
661 				   valid character */
662 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
663 static int eval_isnamec __ARGS((int c));
664 static int eval_isnamec1 __ARGS((int c));
665 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
666 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
667 static typval_T *alloc_tv __ARGS((void));
668 static typval_T *alloc_string_tv __ARGS((char_u *string));
669 static void init_tv __ARGS((typval_T *varp));
670 static long get_tv_number __ARGS((typval_T *varp));
671 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
672 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
673 static char_u *get_tv_string __ARGS((typval_T *varp));
674 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
675 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
676 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
677 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
678 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
679 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
680 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
681 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
682 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
683 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
684 static int var_check_ro __ARGS((int flags, char_u *name));
685 static int tv_check_lock __ARGS((int lock, char_u *name));
686 static void copy_tv __ARGS((typval_T *from, typval_T *to));
687 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
688 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
689 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
690 static int eval_fname_script __ARGS((char_u *p));
691 static int eval_fname_sid __ARGS((char_u *p));
692 static void list_func_head __ARGS((ufunc_T *fp, int indent));
693 static ufunc_T *find_func __ARGS((char_u *name));
694 static int function_exists __ARGS((char_u *name));
695 static int builtin_function __ARGS((char_u *name));
696 #ifdef FEAT_PROFILE
697 static void func_do_profile __ARGS((ufunc_T *fp));
698 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
699 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
700 static int
701 # ifdef __BORLANDC__
702     _RTLENTRYF
703 # endif
704 	prof_total_cmp __ARGS((const void *s1, const void *s2));
705 static int
706 # ifdef __BORLANDC__
707     _RTLENTRYF
708 # endif
709 	prof_self_cmp __ARGS((const void *s1, const void *s2));
710 #endif
711 static int script_autoload __ARGS((char_u *name, int reload));
712 static char_u *autoload_name __ARGS((char_u *name));
713 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
714 static void func_free __ARGS((ufunc_T *fp));
715 static void func_unref __ARGS((char_u *name));
716 static void func_ref __ARGS((char_u *name));
717 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));
718 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
719 static win_T *find_win_by_nr __ARGS((typval_T *vp));
720 static int searchpair_cmn __ARGS((typval_T *argvars, pos_T *match_pos));
721 static int search_cmn __ARGS((typval_T *argvars, pos_T *match_pos, int *flagsp));
722 
723 /* Character used as separated in autoload function/variable names. */
724 #define AUTOLOAD_CHAR '#'
725 
726 /*
727  * Initialize the global and v: variables.
728  */
729     void
730 eval_init()
731 {
732     int		    i;
733     struct vimvar   *p;
734 
735     init_var_dict(&globvardict, &globvars_var);
736     init_var_dict(&vimvardict, &vimvars_var);
737     hash_init(&compat_hashtab);
738     hash_init(&func_hashtab);
739 
740     for (i = 0; i < VV_LEN; ++i)
741     {
742 	p = &vimvars[i];
743 	STRCPY(p->vv_di.di_key, p->vv_name);
744 	if (p->vv_flags & VV_RO)
745 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
746 	else if (p->vv_flags & VV_RO_SBX)
747 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
748 	else
749 	    p->vv_di.di_flags = DI_FLAGS_FIX;
750 
751 	/* add to v: scope dict, unless the value is not always available */
752 	if (p->vv_type != VAR_UNKNOWN)
753 	    hash_add(&vimvarht, p->vv_di.di_key);
754 	if (p->vv_flags & VV_COMPAT)
755 	    /* add to compat scope dict */
756 	    hash_add(&compat_hashtab, p->vv_di.di_key);
757     }
758 }
759 
760 #if defined(EXITFREE) || defined(PROTO)
761     void
762 eval_clear()
763 {
764     int		    i;
765     struct vimvar   *p;
766 
767     for (i = 0; i < VV_LEN; ++i)
768     {
769 	p = &vimvars[i];
770 	if (p->vv_di.di_tv.v_type == VAR_STRING)
771 	{
772 	    vim_free(p->vv_di.di_tv.vval.v_string);
773 	    p->vv_di.di_tv.vval.v_string = NULL;
774 	}
775     }
776     hash_clear(&vimvarht);
777     hash_clear(&compat_hashtab);
778 
779     /* script-local variables */
780     for (i = 1; i <= ga_scripts.ga_len; ++i)
781 	vars_clear(&SCRIPT_VARS(i));
782     ga_clear(&ga_scripts);
783     free_scriptnames();
784 
785     /* global variables */
786     vars_clear(&globvarht);
787 
788     /* functions */
789     free_all_functions();
790     hash_clear(&func_hashtab);
791 
792     /* unreferenced lists and dicts */
793     (void)garbage_collect();
794 }
795 #endif
796 
797 /*
798  * Return the name of the executed function.
799  */
800     char_u *
801 func_name(cookie)
802     void *cookie;
803 {
804     return ((funccall_T *)cookie)->func->uf_name;
805 }
806 
807 /*
808  * Return the address holding the next breakpoint line for a funccall cookie.
809  */
810     linenr_T *
811 func_breakpoint(cookie)
812     void *cookie;
813 {
814     return &((funccall_T *)cookie)->breakpoint;
815 }
816 
817 /*
818  * Return the address holding the debug tick for a funccall cookie.
819  */
820     int *
821 func_dbg_tick(cookie)
822     void *cookie;
823 {
824     return &((funccall_T *)cookie)->dbg_tick;
825 }
826 
827 /*
828  * Return the nesting level for a funccall cookie.
829  */
830     int
831 func_level(cookie)
832     void *cookie;
833 {
834     return ((funccall_T *)cookie)->level;
835 }
836 
837 /* pointer to funccal for currently active function */
838 funccall_T *current_funccal = NULL;
839 
840 /*
841  * Return TRUE when a function was ended by a ":return" command.
842  */
843     int
844 current_func_returned()
845 {
846     return current_funccal->returned;
847 }
848 
849 
850 /*
851  * Set an internal variable to a string value. Creates the variable if it does
852  * not already exist.
853  */
854     void
855 set_internal_string_var(name, value)
856     char_u	*name;
857     char_u	*value;
858 {
859     char_u	*val;
860     typval_T	*tvp;
861 
862     val = vim_strsave(value);
863     if (val != NULL)
864     {
865 	tvp = alloc_string_tv(val);
866 	if (tvp != NULL)
867 	{
868 	    set_var(name, tvp, FALSE);
869 	    free_tv(tvp);
870 	}
871     }
872 }
873 
874 static lval_T	*redir_lval = NULL;
875 static char_u	*redir_endp = NULL;
876 static char_u	*redir_varname = NULL;
877 
878 /*
879  * Start recording command output to a variable
880  * Returns OK if successfully completed the setup.  FAIL otherwise.
881  */
882     int
883 var_redir_start(name, append)
884     char_u	*name;
885     int		append;		/* append to an existing variable */
886 {
887     int		save_emsg;
888     int		err;
889     typval_T	tv;
890 
891     /* Make sure a valid variable name is specified */
892     if (!eval_isnamec1(*name))
893     {
894 	EMSG(_(e_invarg));
895 	return FAIL;
896     }
897 
898     redir_varname = vim_strsave(name);
899     if (redir_varname == NULL)
900 	return FAIL;
901 
902     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
903     if (redir_lval == NULL)
904     {
905 	var_redir_stop();
906 	return FAIL;
907     }
908 
909     /* Parse the variable name (can be a dict or list entry). */
910     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
911 							     FNE_CHECK_START);
912     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
913     {
914 	if (redir_endp != NULL && *redir_endp != NUL)
915 	    /* Trailing characters are present after the variable name */
916 	    EMSG(_(e_trailing));
917 	else
918 	    EMSG(_(e_invarg));
919 	var_redir_stop();
920 	return FAIL;
921     }
922 
923     /* check if we can write to the variable: set it to or append an empty
924      * string */
925     save_emsg = did_emsg;
926     did_emsg = FALSE;
927     tv.v_type = VAR_STRING;
928     tv.vval.v_string = (char_u *)"";
929     if (append)
930 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
931     else
932 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
933     err = did_emsg;
934     did_emsg |= save_emsg;
935     if (err)
936     {
937 	var_redir_stop();
938 	return FAIL;
939     }
940     if (redir_lval->ll_newkey != NULL)
941     {
942 	/* Dictionary item was created, don't do it again. */
943 	vim_free(redir_lval->ll_newkey);
944 	redir_lval->ll_newkey = NULL;
945     }
946 
947     return OK;
948 }
949 
950 /*
951  * Append "value[len]" to the variable set by var_redir_start().
952  */
953     void
954 var_redir_str(value, len)
955     char_u	*value;
956     int		len;
957 {
958     char_u	*val;
959     typval_T	tv;
960     int		save_emsg;
961     int		err;
962 
963     if (redir_lval == NULL)
964 	return;
965 
966     if (len == -1)
967 	/* Append the entire string */
968 	val = vim_strsave(value);
969     else
970 	/* Append only the specified number of characters */
971 	val = vim_strnsave(value, len);
972     if (val == NULL)
973 	return;
974 
975     tv.v_type = VAR_STRING;
976     tv.vval.v_string = val;
977 
978     save_emsg = did_emsg;
979     did_emsg = FALSE;
980     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
981     err = did_emsg;
982     did_emsg |= save_emsg;
983     if (err)
984 	var_redir_stop();
985 
986     vim_free(tv.vval.v_string);
987 }
988 
989 /*
990  * Stop redirecting command output to a variable.
991  */
992     void
993 var_redir_stop()
994 {
995     if (redir_lval != NULL)
996     {
997 	clear_lval(redir_lval);
998 	vim_free(redir_lval);
999 	redir_lval = NULL;
1000     }
1001     vim_free(redir_varname);
1002     redir_varname = NULL;
1003 }
1004 
1005 # if defined(FEAT_MBYTE) || defined(PROTO)
1006     int
1007 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
1008     char_u	*enc_from;
1009     char_u	*enc_to;
1010     char_u	*fname_from;
1011     char_u	*fname_to;
1012 {
1013     int		err = FALSE;
1014 
1015     set_vim_var_string(VV_CC_FROM, enc_from, -1);
1016     set_vim_var_string(VV_CC_TO, enc_to, -1);
1017     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
1018     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
1019     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
1020 	err = TRUE;
1021     set_vim_var_string(VV_CC_FROM, NULL, -1);
1022     set_vim_var_string(VV_CC_TO, NULL, -1);
1023     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1024     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1025 
1026     if (err)
1027 	return FAIL;
1028     return OK;
1029 }
1030 # endif
1031 
1032 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1033     int
1034 eval_printexpr(fname, args)
1035     char_u	*fname;
1036     char_u	*args;
1037 {
1038     int		err = FALSE;
1039 
1040     set_vim_var_string(VV_FNAME_IN, fname, -1);
1041     set_vim_var_string(VV_CMDARG, args, -1);
1042     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1043 	err = TRUE;
1044     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1045     set_vim_var_string(VV_CMDARG, NULL, -1);
1046 
1047     if (err)
1048     {
1049 	mch_remove(fname);
1050 	return FAIL;
1051     }
1052     return OK;
1053 }
1054 # endif
1055 
1056 # if defined(FEAT_DIFF) || defined(PROTO)
1057     void
1058 eval_diff(origfile, newfile, outfile)
1059     char_u	*origfile;
1060     char_u	*newfile;
1061     char_u	*outfile;
1062 {
1063     int		err = FALSE;
1064 
1065     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1066     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1067     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1068     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1069     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1070     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1071     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1072 }
1073 
1074     void
1075 eval_patch(origfile, difffile, outfile)
1076     char_u	*origfile;
1077     char_u	*difffile;
1078     char_u	*outfile;
1079 {
1080     int		err;
1081 
1082     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1083     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1084     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1085     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1086     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1087     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1088     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1089 }
1090 # endif
1091 
1092 /*
1093  * Top level evaluation function, returning a boolean.
1094  * Sets "error" to TRUE if there was an error.
1095  * Return TRUE or FALSE.
1096  */
1097     int
1098 eval_to_bool(arg, error, nextcmd, skip)
1099     char_u	*arg;
1100     int		*error;
1101     char_u	**nextcmd;
1102     int		skip;	    /* only parse, don't execute */
1103 {
1104     typval_T	tv;
1105     int		retval = FALSE;
1106 
1107     if (skip)
1108 	++emsg_skip;
1109     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1110 	*error = TRUE;
1111     else
1112     {
1113 	*error = FALSE;
1114 	if (!skip)
1115 	{
1116 	    retval = (get_tv_number_chk(&tv, error) != 0);
1117 	    clear_tv(&tv);
1118 	}
1119     }
1120     if (skip)
1121 	--emsg_skip;
1122 
1123     return retval;
1124 }
1125 
1126 /*
1127  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1128  * only parsing to "nextcmd" is done, without reporting errors.  Return
1129  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1130  */
1131     char_u *
1132 eval_to_string_skip(arg, nextcmd, skip)
1133     char_u	*arg;
1134     char_u	**nextcmd;
1135     int		skip;	    /* only parse, don't execute */
1136 {
1137     typval_T	tv;
1138     char_u	*retval;
1139 
1140     if (skip)
1141 	++emsg_skip;
1142     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1143 	retval = NULL;
1144     else
1145     {
1146 	retval = vim_strsave(get_tv_string(&tv));
1147 	clear_tv(&tv);
1148     }
1149     if (skip)
1150 	--emsg_skip;
1151 
1152     return retval;
1153 }
1154 
1155 /*
1156  * Skip over an expression at "*pp".
1157  * Return FAIL for an error, OK otherwise.
1158  */
1159     int
1160 skip_expr(pp)
1161     char_u	**pp;
1162 {
1163     typval_T	rettv;
1164 
1165     *pp = skipwhite(*pp);
1166     return eval1(pp, &rettv, FALSE);
1167 }
1168 
1169 /*
1170  * Top level evaluation function, returning a string.
1171  * Return pointer to allocated memory, or NULL for failure.
1172  */
1173     char_u *
1174 eval_to_string(arg, nextcmd, dolist)
1175     char_u	*arg;
1176     char_u	**nextcmd;
1177     int		dolist;		/* turn List into sequence of lines */
1178 {
1179     typval_T	tv;
1180     char_u	*retval;
1181     garray_T	ga;
1182 
1183     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1184 	retval = NULL;
1185     else
1186     {
1187 	if (dolist && tv.v_type == VAR_LIST)
1188 	{
1189 	    ga_init2(&ga, (int)sizeof(char), 80);
1190 	    list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, 0);
1191 	    ga_append(&ga, NUL);
1192 	    retval = (char_u *)ga.ga_data;
1193 	}
1194 	else
1195 	    retval = vim_strsave(get_tv_string(&tv));
1196 	clear_tv(&tv);
1197     }
1198 
1199     return retval;
1200 }
1201 
1202 /*
1203  * Call eval_to_string() without using current local variables and using
1204  * textlock.  When "use_sandbox" is TRUE use the sandbox.
1205  */
1206     char_u *
1207 eval_to_string_safe(arg, nextcmd, use_sandbox)
1208     char_u	*arg;
1209     char_u	**nextcmd;
1210     int		use_sandbox;
1211 {
1212     char_u	*retval;
1213     void	*save_funccalp;
1214 
1215     save_funccalp = save_funccal();
1216     if (use_sandbox)
1217 	++sandbox;
1218     ++textlock;
1219     retval = eval_to_string(arg, nextcmd, FALSE);
1220     if (use_sandbox)
1221 	--sandbox;
1222     --textlock;
1223     restore_funccal(save_funccalp);
1224     return retval;
1225 }
1226 
1227 /*
1228  * Top level evaluation function, returning a number.
1229  * Evaluates "expr" silently.
1230  * Returns -1 for an error.
1231  */
1232     int
1233 eval_to_number(expr)
1234     char_u	*expr;
1235 {
1236     typval_T	rettv;
1237     int		retval;
1238     char_u	*p = skipwhite(expr);
1239 
1240     ++emsg_off;
1241 
1242     if (eval1(&p, &rettv, TRUE) == FAIL)
1243 	retval = -1;
1244     else
1245     {
1246 	retval = get_tv_number_chk(&rettv, NULL);
1247 	clear_tv(&rettv);
1248     }
1249     --emsg_off;
1250 
1251     return retval;
1252 }
1253 
1254 /*
1255  * Prepare v: variable "idx" to be used.
1256  * Save the current typeval in "save_tv".
1257  * When not used yet add the variable to the v: hashtable.
1258  */
1259     static void
1260 prepare_vimvar(idx, save_tv)
1261     int		idx;
1262     typval_T	*save_tv;
1263 {
1264     *save_tv = vimvars[idx].vv_tv;
1265     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1266 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1267 }
1268 
1269 /*
1270  * Restore v: variable "idx" to typeval "save_tv".
1271  * When no longer defined, remove the variable from the v: hashtable.
1272  */
1273     static void
1274 restore_vimvar(idx, save_tv)
1275     int		idx;
1276     typval_T	*save_tv;
1277 {
1278     hashitem_T	*hi;
1279 
1280     clear_tv(&vimvars[idx].vv_tv);
1281     vimvars[idx].vv_tv = *save_tv;
1282     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1283     {
1284 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1285 	if (HASHITEM_EMPTY(hi))
1286 	    EMSG2(_(e_intern2), "restore_vimvar()");
1287 	else
1288 	    hash_remove(&vimvarht, hi);
1289     }
1290 }
1291 
1292 #if defined(FEAT_SYN_HL) || defined(PROTO)
1293 /*
1294  * Evaluate an expression to a list with suggestions.
1295  * For the "expr:" part of 'spellsuggest'.
1296  */
1297     list_T *
1298 eval_spell_expr(badword, expr)
1299     char_u	*badword;
1300     char_u	*expr;
1301 {
1302     typval_T	save_val;
1303     typval_T	rettv;
1304     list_T	*list = NULL;
1305     char_u	*p = skipwhite(expr);
1306 
1307     /* Set "v:val" to the bad word. */
1308     prepare_vimvar(VV_VAL, &save_val);
1309     vimvars[VV_VAL].vv_type = VAR_STRING;
1310     vimvars[VV_VAL].vv_str = badword;
1311     if (p_verbose == 0)
1312 	++emsg_off;
1313 
1314     if (eval1(&p, &rettv, TRUE) == OK)
1315     {
1316 	if (rettv.v_type != VAR_LIST)
1317 	    clear_tv(&rettv);
1318 	else
1319 	    list = rettv.vval.v_list;
1320     }
1321 
1322     if (p_verbose == 0)
1323 	--emsg_off;
1324     vimvars[VV_VAL].vv_str = NULL;
1325     restore_vimvar(VV_VAL, &save_val);
1326 
1327     return list;
1328 }
1329 
1330 /*
1331  * "list" is supposed to contain two items: a word and a number.  Return the
1332  * word in "pp" and the number as the return value.
1333  * Return -1 if anything isn't right.
1334  * Used to get the good word and score from the eval_spell_expr() result.
1335  */
1336     int
1337 get_spellword(list, pp)
1338     list_T	*list;
1339     char_u	**pp;
1340 {
1341     listitem_T	*li;
1342 
1343     li = list->lv_first;
1344     if (li == NULL)
1345 	return -1;
1346     *pp = get_tv_string(&li->li_tv);
1347 
1348     li = li->li_next;
1349     if (li == NULL)
1350 	return -1;
1351     return get_tv_number(&li->li_tv);
1352 }
1353 #endif
1354 
1355 /*
1356  * Top level evaluation function.
1357  * Returns an allocated typval_T with the result.
1358  * Returns NULL when there is an error.
1359  */
1360     typval_T *
1361 eval_expr(arg, nextcmd)
1362     char_u	*arg;
1363     char_u	**nextcmd;
1364 {
1365     typval_T	*tv;
1366 
1367     tv = (typval_T *)alloc(sizeof(typval_T));
1368     if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
1369     {
1370 	vim_free(tv);
1371 	tv = NULL;
1372     }
1373 
1374     return tv;
1375 }
1376 
1377 
1378 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1379 /*
1380  * Call some vimL function and return the result in "*rettv".
1381  * Uses argv[argc] for the function arguments.
1382  * Returns OK or FAIL.
1383  */
1384     static int
1385 call_vim_function(func, argc, argv, safe, rettv)
1386     char_u      *func;
1387     int		argc;
1388     char_u      **argv;
1389     int		safe;		/* use the sandbox */
1390     typval_T	*rettv;
1391 {
1392     typval_T	*argvars;
1393     long	n;
1394     int		len;
1395     int		i;
1396     int		doesrange;
1397     void	*save_funccalp = NULL;
1398     int		ret;
1399 
1400     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1401     if (argvars == NULL)
1402 	return FAIL;
1403 
1404     for (i = 0; i < argc; i++)
1405     {
1406 	/* Pass a NULL or empty argument as an empty string */
1407 	if (argv[i] == NULL || *argv[i] == NUL)
1408 	{
1409 	    argvars[i].v_type = VAR_STRING;
1410 	    argvars[i].vval.v_string = (char_u *)"";
1411 	    continue;
1412 	}
1413 
1414 	/* Recognize a number argument, the others must be strings. */
1415 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1416 	if (len != 0 && len == (int)STRLEN(argv[i]))
1417 	{
1418 	    argvars[i].v_type = VAR_NUMBER;
1419 	    argvars[i].vval.v_number = n;
1420 	}
1421 	else
1422 	{
1423 	    argvars[i].v_type = VAR_STRING;
1424 	    argvars[i].vval.v_string = argv[i];
1425 	}
1426     }
1427 
1428     if (safe)
1429     {
1430 	save_funccalp = save_funccal();
1431 	++sandbox;
1432     }
1433 
1434     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1435     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1436 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1437 		    &doesrange, TRUE, NULL);
1438     if (safe)
1439     {
1440 	--sandbox;
1441 	restore_funccal(save_funccalp);
1442     }
1443     vim_free(argvars);
1444 
1445     if (ret == FAIL)
1446 	clear_tv(rettv);
1447 
1448     return ret;
1449 }
1450 
1451 /*
1452  * Call vimL function "func" and return the result as a string.
1453  * Returns NULL when calling the function fails.
1454  * Uses argv[argc] for the function arguments.
1455  */
1456     void *
1457 call_func_retstr(func, argc, argv, safe)
1458     char_u      *func;
1459     int		argc;
1460     char_u      **argv;
1461     int		safe;		/* use the sandbox */
1462 {
1463     typval_T	rettv;
1464     char_u	*retval;
1465 
1466     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1467 	return NULL;
1468 
1469     retval = vim_strsave(get_tv_string(&rettv));
1470     clear_tv(&rettv);
1471     return retval;
1472 }
1473 
1474 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1475 /*
1476  * Call vimL function "func" and return the result as a number.
1477  * Returns -1 when calling the function fails.
1478  * Uses argv[argc] for the function arguments.
1479  */
1480     long
1481 call_func_retnr(func, argc, argv, safe)
1482     char_u      *func;
1483     int		argc;
1484     char_u      **argv;
1485     int		safe;		/* use the sandbox */
1486 {
1487     typval_T	rettv;
1488     long	retval;
1489 
1490     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1491 	return -1;
1492 
1493     retval = get_tv_number_chk(&rettv, NULL);
1494     clear_tv(&rettv);
1495     return retval;
1496 }
1497 #endif
1498 
1499 /*
1500  * Call vimL function "func" and return the result as a list
1501  * Uses argv[argc] for the function arguments.
1502  */
1503     void *
1504 call_func_retlist(func, argc, argv, safe)
1505     char_u      *func;
1506     int		argc;
1507     char_u      **argv;
1508     int		safe;		/* use the sandbox */
1509 {
1510     typval_T	rettv;
1511 
1512     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1513 	return NULL;
1514 
1515     if (rettv.v_type != VAR_LIST)
1516     {
1517 	clear_tv(&rettv);
1518 	return NULL;
1519     }
1520 
1521     return rettv.vval.v_list;
1522 }
1523 
1524 #endif
1525 
1526 /*
1527  * Save the current function call pointer, and set it to NULL.
1528  * Used when executing autocommands and for ":source".
1529  */
1530     void *
1531 save_funccal()
1532 {
1533     funccall_T *fc = current_funccal;
1534 
1535     current_funccal = NULL;
1536     return (void *)fc;
1537 }
1538 
1539     void
1540 restore_funccal(vfc)
1541     void *vfc;
1542 {
1543     funccall_T *fc = (funccall_T *)vfc;
1544 
1545     current_funccal = fc;
1546 }
1547 
1548 #if defined(FEAT_PROFILE) || defined(PROTO)
1549 /*
1550  * Prepare profiling for entering a child or something else that is not
1551  * counted for the script/function itself.
1552  * Should always be called in pair with prof_child_exit().
1553  */
1554     void
1555 prof_child_enter(tm)
1556     proftime_T *tm;	/* place to store waittime */
1557 {
1558     funccall_T *fc = current_funccal;
1559 
1560     if (fc != NULL && fc->func->uf_profiling)
1561 	profile_start(&fc->prof_child);
1562     script_prof_save(tm);
1563 }
1564 
1565 /*
1566  * Take care of time spent in a child.
1567  * Should always be called after prof_child_enter().
1568  */
1569     void
1570 prof_child_exit(tm)
1571     proftime_T *tm;	/* where waittime was stored */
1572 {
1573     funccall_T *fc = current_funccal;
1574 
1575     if (fc != NULL && fc->func->uf_profiling)
1576     {
1577 	profile_end(&fc->prof_child);
1578 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1579 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1580 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1581     }
1582     script_prof_restore(tm);
1583 }
1584 #endif
1585 
1586 
1587 #ifdef FEAT_FOLDING
1588 /*
1589  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1590  * it in "*cp".  Doesn't give error messages.
1591  */
1592     int
1593 eval_foldexpr(arg, cp)
1594     char_u	*arg;
1595     int		*cp;
1596 {
1597     typval_T	tv;
1598     int		retval;
1599     char_u	*s;
1600     int		use_sandbox = was_set_insecurely((char_u *)"foldexpr",
1601 								   OPT_LOCAL);
1602 
1603     ++emsg_off;
1604     if (use_sandbox)
1605 	++sandbox;
1606     ++textlock;
1607     *cp = NUL;
1608     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1609 	retval = 0;
1610     else
1611     {
1612 	/* If the result is a number, just return the number. */
1613 	if (tv.v_type == VAR_NUMBER)
1614 	    retval = tv.vval.v_number;
1615 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1616 	    retval = 0;
1617 	else
1618 	{
1619 	    /* If the result is a string, check if there is a non-digit before
1620 	     * the number. */
1621 	    s = tv.vval.v_string;
1622 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1623 		*cp = *s++;
1624 	    retval = atol((char *)s);
1625 	}
1626 	clear_tv(&tv);
1627     }
1628     --emsg_off;
1629     if (use_sandbox)
1630 	--sandbox;
1631     --textlock;
1632 
1633     return retval;
1634 }
1635 #endif
1636 
1637 /*
1638  * ":let"			list all variable values
1639  * ":let var1 var2"		list variable values
1640  * ":let var = expr"		assignment command.
1641  * ":let var += expr"		assignment command.
1642  * ":let var -= expr"		assignment command.
1643  * ":let var .= expr"		assignment command.
1644  * ":let [var1, var2] = expr"	unpack list.
1645  */
1646     void
1647 ex_let(eap)
1648     exarg_T	*eap;
1649 {
1650     char_u	*arg = eap->arg;
1651     char_u	*expr = NULL;
1652     typval_T	rettv;
1653     int		i;
1654     int		var_count = 0;
1655     int		semicolon = 0;
1656     char_u	op[2];
1657 
1658     expr = skip_var_list(arg, &var_count, &semicolon);
1659     if (expr == NULL)
1660 	return;
1661     expr = vim_strchr(expr, '=');
1662     if (expr == NULL)
1663     {
1664 	/*
1665 	 * ":let" without "=": list variables
1666 	 */
1667 	if (*arg == '[')
1668 	    EMSG(_(e_invarg));
1669 	else if (!ends_excmd(*arg))
1670 	    /* ":let var1 var2" */
1671 	    arg = list_arg_vars(eap, arg);
1672 	else if (!eap->skip)
1673 	{
1674 	    /* ":let" */
1675 	    list_glob_vars();
1676 	    list_buf_vars();
1677 	    list_win_vars();
1678 	    list_vim_vars();
1679 	}
1680 	eap->nextcmd = check_nextcmd(arg);
1681     }
1682     else
1683     {
1684 	op[0] = '=';
1685 	op[1] = NUL;
1686 	if (expr > arg)
1687 	{
1688 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1689 		op[0] = expr[-1];   /* +=, -= or .= */
1690 	}
1691 	expr = skipwhite(expr + 1);
1692 
1693 	if (eap->skip)
1694 	    ++emsg_skip;
1695 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1696 	if (eap->skip)
1697 	{
1698 	    if (i != FAIL)
1699 		clear_tv(&rettv);
1700 	    --emsg_skip;
1701 	}
1702 	else if (i != FAIL)
1703 	{
1704 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1705 									  op);
1706 	    clear_tv(&rettv);
1707 	}
1708     }
1709 }
1710 
1711 /*
1712  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1713  * Handles both "var" with any type and "[var, var; var]" with a list type.
1714  * When "nextchars" is not NULL it points to a string with characters that
1715  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1716  * or concatenate.
1717  * Returns OK or FAIL;
1718  */
1719     static int
1720 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1721     char_u	*arg_start;
1722     typval_T	*tv;
1723     int		copy;		/* copy values from "tv", don't move */
1724     int		semicolon;	/* from skip_var_list() */
1725     int		var_count;	/* from skip_var_list() */
1726     char_u	*nextchars;
1727 {
1728     char_u	*arg = arg_start;
1729     list_T	*l;
1730     int		i;
1731     listitem_T	*item;
1732     typval_T	ltv;
1733 
1734     if (*arg != '[')
1735     {
1736 	/*
1737 	 * ":let var = expr" or ":for var in list"
1738 	 */
1739 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1740 	    return FAIL;
1741 	return OK;
1742     }
1743 
1744     /*
1745      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1746      */
1747     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1748     {
1749 	EMSG(_(e_listreq));
1750 	return FAIL;
1751     }
1752 
1753     i = list_len(l);
1754     if (semicolon == 0 && var_count < i)
1755     {
1756 	EMSG(_("E687: Less targets than List items"));
1757 	return FAIL;
1758     }
1759     if (var_count - semicolon > i)
1760     {
1761 	EMSG(_("E688: More targets than List items"));
1762 	return FAIL;
1763     }
1764 
1765     item = l->lv_first;
1766     while (*arg != ']')
1767     {
1768 	arg = skipwhite(arg + 1);
1769 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1770 	item = item->li_next;
1771 	if (arg == NULL)
1772 	    return FAIL;
1773 
1774 	arg = skipwhite(arg);
1775 	if (*arg == ';')
1776 	{
1777 	    /* Put the rest of the list (may be empty) in the var after ';'.
1778 	     * Create a new list for this. */
1779 	    l = list_alloc();
1780 	    if (l == NULL)
1781 		return FAIL;
1782 	    while (item != NULL)
1783 	    {
1784 		list_append_tv(l, &item->li_tv);
1785 		item = item->li_next;
1786 	    }
1787 
1788 	    ltv.v_type = VAR_LIST;
1789 	    ltv.v_lock = 0;
1790 	    ltv.vval.v_list = l;
1791 	    l->lv_refcount = 1;
1792 
1793 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1794 						    (char_u *)"]", nextchars);
1795 	    clear_tv(&ltv);
1796 	    if (arg == NULL)
1797 		return FAIL;
1798 	    break;
1799 	}
1800 	else if (*arg != ',' && *arg != ']')
1801 	{
1802 	    EMSG2(_(e_intern2), "ex_let_vars()");
1803 	    return FAIL;
1804 	}
1805     }
1806 
1807     return OK;
1808 }
1809 
1810 /*
1811  * Skip over assignable variable "var" or list of variables "[var, var]".
1812  * Used for ":let varvar = expr" and ":for varvar in expr".
1813  * For "[var, var]" increment "*var_count" for each variable.
1814  * for "[var, var; var]" set "semicolon".
1815  * Return NULL for an error.
1816  */
1817     static char_u *
1818 skip_var_list(arg, var_count, semicolon)
1819     char_u	*arg;
1820     int		*var_count;
1821     int		*semicolon;
1822 {
1823     char_u	*p, *s;
1824 
1825     if (*arg == '[')
1826     {
1827 	/* "[var, var]": find the matching ']'. */
1828 	p = arg;
1829 	for (;;)
1830 	{
1831 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1832 	    s = skip_var_one(p);
1833 	    if (s == p)
1834 	    {
1835 		EMSG2(_(e_invarg2), p);
1836 		return NULL;
1837 	    }
1838 	    ++*var_count;
1839 
1840 	    p = skipwhite(s);
1841 	    if (*p == ']')
1842 		break;
1843 	    else if (*p == ';')
1844 	    {
1845 		if (*semicolon == 1)
1846 		{
1847 		    EMSG(_("Double ; in list of variables"));
1848 		    return NULL;
1849 		}
1850 		*semicolon = 1;
1851 	    }
1852 	    else if (*p != ',')
1853 	    {
1854 		EMSG2(_(e_invarg2), p);
1855 		return NULL;
1856 	    }
1857 	}
1858 	return p + 1;
1859     }
1860     else
1861 	return skip_var_one(arg);
1862 }
1863 
1864 /*
1865  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1866  * l[idx].
1867  */
1868     static char_u *
1869 skip_var_one(arg)
1870     char_u	*arg;
1871 {
1872     if (*arg == '@' && arg[1] != NUL)
1873 	return arg + 2;
1874     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1875 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1876 }
1877 
1878 /*
1879  * List variables for hashtab "ht" with prefix "prefix".
1880  * If "empty" is TRUE also list NULL strings as empty strings.
1881  */
1882     static void
1883 list_hashtable_vars(ht, prefix, empty)
1884     hashtab_T	*ht;
1885     char_u	*prefix;
1886     int		empty;
1887 {
1888     hashitem_T	*hi;
1889     dictitem_T	*di;
1890     int		todo;
1891 
1892     todo = ht->ht_used;
1893     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1894     {
1895 	if (!HASHITEM_EMPTY(hi))
1896 	{
1897 	    --todo;
1898 	    di = HI2DI(hi);
1899 	    if (empty || di->di_tv.v_type != VAR_STRING
1900 					   || di->di_tv.vval.v_string != NULL)
1901 		list_one_var(di, prefix);
1902 	}
1903     }
1904 }
1905 
1906 /*
1907  * List global variables.
1908  */
1909     static void
1910 list_glob_vars()
1911 {
1912     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1913 }
1914 
1915 /*
1916  * List buffer variables.
1917  */
1918     static void
1919 list_buf_vars()
1920 {
1921     char_u	numbuf[NUMBUFLEN];
1922 
1923     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1924 
1925     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1926     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1927 }
1928 
1929 /*
1930  * List window variables.
1931  */
1932     static void
1933 list_win_vars()
1934 {
1935     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1936 }
1937 
1938 /*
1939  * List Vim variables.
1940  */
1941     static void
1942 list_vim_vars()
1943 {
1944     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1945 }
1946 
1947 /*
1948  * List variables in "arg".
1949  */
1950     static char_u *
1951 list_arg_vars(eap, arg)
1952     exarg_T	*eap;
1953     char_u	*arg;
1954 {
1955     int		error = FALSE;
1956     int		len;
1957     char_u	*name;
1958     char_u	*name_start;
1959     char_u	*arg_subsc;
1960     char_u	*tofree;
1961     typval_T    tv;
1962 
1963     while (!ends_excmd(*arg) && !got_int)
1964     {
1965 	if (error || eap->skip)
1966 	{
1967 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1968 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1969 	    {
1970 		emsg_severe = TRUE;
1971 		EMSG(_(e_trailing));
1972 		break;
1973 	    }
1974 	}
1975 	else
1976 	{
1977 	    /* get_name_len() takes care of expanding curly braces */
1978 	    name_start = name = arg;
1979 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1980 	    if (len <= 0)
1981 	    {
1982 		/* This is mainly to keep test 49 working: when expanding
1983 		 * curly braces fails overrule the exception error message. */
1984 		if (len < 0 && !aborting())
1985 		{
1986 		    emsg_severe = TRUE;
1987 		    EMSG2(_(e_invarg2), arg);
1988 		    break;
1989 		}
1990 		error = TRUE;
1991 	    }
1992 	    else
1993 	    {
1994 		if (tofree != NULL)
1995 		    name = tofree;
1996 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1997 		    error = TRUE;
1998 		else
1999 		{
2000 		    /* handle d.key, l[idx], f(expr) */
2001 		    arg_subsc = arg;
2002 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
2003 			error = TRUE;
2004 		    else
2005 		    {
2006 			if (arg == arg_subsc && len == 2 && name[1] == ':')
2007 			{
2008 			    switch (*name)
2009 			    {
2010 				case 'g': list_glob_vars(); break;
2011 				case 'b': list_buf_vars(); break;
2012 				case 'w': list_win_vars(); break;
2013 				case 'v': list_vim_vars(); break;
2014 				default:
2015 					  EMSG2(_("E738: Can't list variables for %s"), name);
2016 			    }
2017 			}
2018 			else
2019 			{
2020 			    char_u	numbuf[NUMBUFLEN];
2021 			    char_u	*tf;
2022 			    int		c;
2023 			    char_u	*s;
2024 
2025 			    s = echo_string(&tv, &tf, numbuf, 0);
2026 			    c = *arg;
2027 			    *arg = NUL;
2028 			    list_one_var_a((char_u *)"",
2029 				    arg == arg_subsc ? name : name_start,
2030 				    tv.v_type, s == NULL ? (char_u *)"" : s);
2031 			    *arg = c;
2032 			    vim_free(tf);
2033 			}
2034 			clear_tv(&tv);
2035 		    }
2036 		}
2037 	    }
2038 
2039 	    vim_free(tofree);
2040 	}
2041 
2042 	arg = skipwhite(arg);
2043     }
2044 
2045     return arg;
2046 }
2047 
2048 /*
2049  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2050  * Returns a pointer to the char just after the var name.
2051  * Returns NULL if there is an error.
2052  */
2053     static char_u *
2054 ex_let_one(arg, tv, copy, endchars, op)
2055     char_u	*arg;		/* points to variable name */
2056     typval_T	*tv;		/* value to assign to variable */
2057     int		copy;		/* copy value from "tv" */
2058     char_u	*endchars;	/* valid chars after variable name  or NULL */
2059     char_u	*op;		/* "+", "-", "."  or NULL*/
2060 {
2061     int		c1;
2062     char_u	*name;
2063     char_u	*p;
2064     char_u	*arg_end = NULL;
2065     int		len;
2066     int		opt_flags;
2067     char_u	*tofree = NULL;
2068 
2069     /*
2070      * ":let $VAR = expr": Set environment variable.
2071      */
2072     if (*arg == '$')
2073     {
2074 	/* Find the end of the name. */
2075 	++arg;
2076 	name = arg;
2077 	len = get_env_len(&arg);
2078 	if (len == 0)
2079 	    EMSG2(_(e_invarg2), name - 1);
2080 	else
2081 	{
2082 	    if (op != NULL && (*op == '+' || *op == '-'))
2083 		EMSG2(_(e_letwrong), op);
2084 	    else if (endchars != NULL
2085 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2086 		EMSG(_(e_letunexp));
2087 	    else
2088 	    {
2089 		c1 = name[len];
2090 		name[len] = NUL;
2091 		p = get_tv_string_chk(tv);
2092 		if (p != NULL && op != NULL && *op == '.')
2093 		{
2094 		    int	    mustfree = FALSE;
2095 		    char_u  *s = vim_getenv(name, &mustfree);
2096 
2097 		    if (s != NULL)
2098 		    {
2099 			p = tofree = concat_str(s, p);
2100 			if (mustfree)
2101 			    vim_free(s);
2102 		    }
2103 		}
2104 		if (p != NULL)
2105 		{
2106 		    vim_setenv(name, p);
2107 		    if (STRICMP(name, "HOME") == 0)
2108 			init_homedir();
2109 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2110 			didset_vim = FALSE;
2111 		    else if (didset_vimruntime
2112 					&& STRICMP(name, "VIMRUNTIME") == 0)
2113 			didset_vimruntime = FALSE;
2114 		    arg_end = arg;
2115 		}
2116 		name[len] = c1;
2117 		vim_free(tofree);
2118 	    }
2119 	}
2120     }
2121 
2122     /*
2123      * ":let &option = expr": Set option value.
2124      * ":let &l:option = expr": Set local option value.
2125      * ":let &g:option = expr": Set global option value.
2126      */
2127     else if (*arg == '&')
2128     {
2129 	/* Find the end of the name. */
2130 	p = find_option_end(&arg, &opt_flags);
2131 	if (p == NULL || (endchars != NULL
2132 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2133 	    EMSG(_(e_letunexp));
2134 	else
2135 	{
2136 	    long	n;
2137 	    int		opt_type;
2138 	    long	numval;
2139 	    char_u	*stringval = NULL;
2140 	    char_u	*s;
2141 
2142 	    c1 = *p;
2143 	    *p = NUL;
2144 
2145 	    n = get_tv_number(tv);
2146 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2147 	    if (s != NULL && op != NULL && *op != '=')
2148 	    {
2149 		opt_type = get_option_value(arg, &numval,
2150 						       &stringval, opt_flags);
2151 		if ((opt_type == 1 && *op == '.')
2152 			|| (opt_type == 0 && *op != '.'))
2153 		    EMSG2(_(e_letwrong), op);
2154 		else
2155 		{
2156 		    if (opt_type == 1)  /* number */
2157 		    {
2158 			if (*op == '+')
2159 			    n = numval + n;
2160 			else
2161 			    n = numval - n;
2162 		    }
2163 		    else if (opt_type == 0 && stringval != NULL) /* string */
2164 		    {
2165 			s = concat_str(stringval, s);
2166 			vim_free(stringval);
2167 			stringval = s;
2168 		    }
2169 		}
2170 	    }
2171 	    if (s != NULL)
2172 	    {
2173 		set_option_value(arg, n, s, opt_flags);
2174 		arg_end = p;
2175 	    }
2176 	    *p = c1;
2177 	    vim_free(stringval);
2178 	}
2179     }
2180 
2181     /*
2182      * ":let @r = expr": Set register contents.
2183      */
2184     else if (*arg == '@')
2185     {
2186 	++arg;
2187 	if (op != NULL && (*op == '+' || *op == '-'))
2188 	    EMSG2(_(e_letwrong), op);
2189 	else if (endchars != NULL
2190 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2191 	    EMSG(_(e_letunexp));
2192 	else
2193 	{
2194 	    char_u	*tofree = NULL;
2195 	    char_u	*s;
2196 
2197 	    p = get_tv_string_chk(tv);
2198 	    if (p != NULL && op != NULL && *op == '.')
2199 	    {
2200 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2201 		if (s != NULL)
2202 		{
2203 		    p = tofree = concat_str(s, p);
2204 		    vim_free(s);
2205 		}
2206 	    }
2207 	    if (p != NULL)
2208 	    {
2209 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2210 		arg_end = arg + 1;
2211 	    }
2212 	    vim_free(tofree);
2213 	}
2214     }
2215 
2216     /*
2217      * ":let var = expr": Set internal variable.
2218      * ":let {expr} = expr": Idem, name made with curly braces
2219      */
2220     else if (eval_isnamec1(*arg) || *arg == '{')
2221     {
2222 	lval_T	lv;
2223 
2224 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2225 	if (p != NULL && lv.ll_name != NULL)
2226 	{
2227 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2228 		EMSG(_(e_letunexp));
2229 	    else
2230 	    {
2231 		set_var_lval(&lv, p, tv, copy, op);
2232 		arg_end = p;
2233 	    }
2234 	}
2235 	clear_lval(&lv);
2236     }
2237 
2238     else
2239 	EMSG2(_(e_invarg2), arg);
2240 
2241     return arg_end;
2242 }
2243 
2244 /*
2245  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2246  */
2247     static int
2248 check_changedtick(arg)
2249     char_u	*arg;
2250 {
2251     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2252     {
2253 	EMSG2(_(e_readonlyvar), arg);
2254 	return TRUE;
2255     }
2256     return FALSE;
2257 }
2258 
2259 /*
2260  * Get an lval: variable, Dict item or List item that can be assigned a value
2261  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2262  * "name.key", "name.key[expr]" etc.
2263  * Indexing only works if "name" is an existing List or Dictionary.
2264  * "name" points to the start of the name.
2265  * If "rettv" is not NULL it points to the value to be assigned.
2266  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2267  * wrong; must end in space or cmd separator.
2268  *
2269  * Returns a pointer to just after the name, including indexes.
2270  * When an evaluation error occurs "lp->ll_name" is NULL;
2271  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2272  */
2273     static char_u *
2274 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2275     char_u	*name;
2276     typval_T	*rettv;
2277     lval_T	*lp;
2278     int		unlet;
2279     int		skip;
2280     int		quiet;	    /* don't give error messages */
2281     int		fne_flags;  /* flags for find_name_end() */
2282 {
2283     char_u	*p;
2284     char_u	*expr_start, *expr_end;
2285     int		cc;
2286     dictitem_T	*v;
2287     typval_T	var1;
2288     typval_T	var2;
2289     int		empty1 = FALSE;
2290     listitem_T	*ni;
2291     char_u	*key = NULL;
2292     int		len;
2293     hashtab_T	*ht;
2294 
2295     /* Clear everything in "lp". */
2296     vim_memset(lp, 0, sizeof(lval_T));
2297 
2298     if (skip)
2299     {
2300 	/* When skipping just find the end of the name. */
2301 	lp->ll_name = name;
2302 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2303     }
2304 
2305     /* Find the end of the name. */
2306     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2307     if (expr_start != NULL)
2308     {
2309 	/* Don't expand the name when we already know there is an error. */
2310 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2311 						    && *p != '[' && *p != '.')
2312 	{
2313 	    EMSG(_(e_trailing));
2314 	    return NULL;
2315 	}
2316 
2317 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2318 	if (lp->ll_exp_name == NULL)
2319 	{
2320 	    /* Report an invalid expression in braces, unless the
2321 	     * expression evaluation has been cancelled due to an
2322 	     * aborting error, an interrupt, or an exception. */
2323 	    if (!aborting() && !quiet)
2324 	    {
2325 		emsg_severe = TRUE;
2326 		EMSG2(_(e_invarg2), name);
2327 		return NULL;
2328 	    }
2329 	}
2330 	lp->ll_name = lp->ll_exp_name;
2331     }
2332     else
2333 	lp->ll_name = name;
2334 
2335     /* Without [idx] or .key we are done. */
2336     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2337 	return p;
2338 
2339     cc = *p;
2340     *p = NUL;
2341     v = find_var(lp->ll_name, &ht);
2342     if (v == NULL && !quiet)
2343 	EMSG2(_(e_undefvar), lp->ll_name);
2344     *p = cc;
2345     if (v == NULL)
2346 	return NULL;
2347 
2348     /*
2349      * Loop until no more [idx] or .key is following.
2350      */
2351     lp->ll_tv = &v->di_tv;
2352     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2353     {
2354 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2355 		&& !(lp->ll_tv->v_type == VAR_DICT
2356 					   && lp->ll_tv->vval.v_dict != NULL))
2357 	{
2358 	    if (!quiet)
2359 		EMSG(_("E689: Can only index a List or Dictionary"));
2360 	    return NULL;
2361 	}
2362 	if (lp->ll_range)
2363 	{
2364 	    if (!quiet)
2365 		EMSG(_("E708: [:] must come last"));
2366 	    return NULL;
2367 	}
2368 
2369 	len = -1;
2370 	if (*p == '.')
2371 	{
2372 	    key = p + 1;
2373 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2374 		;
2375 	    if (len == 0)
2376 	    {
2377 		if (!quiet)
2378 		    EMSG(_(e_emptykey));
2379 		return NULL;
2380 	    }
2381 	    p = key + len;
2382 	}
2383 	else
2384 	{
2385 	    /* Get the index [expr] or the first index [expr: ]. */
2386 	    p = skipwhite(p + 1);
2387 	    if (*p == ':')
2388 		empty1 = TRUE;
2389 	    else
2390 	    {
2391 		empty1 = FALSE;
2392 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2393 		    return NULL;
2394 		if (get_tv_string_chk(&var1) == NULL)
2395 		{
2396 		    /* not a number or string */
2397 		    clear_tv(&var1);
2398 		    return NULL;
2399 		}
2400 	    }
2401 
2402 	    /* Optionally get the second index [ :expr]. */
2403 	    if (*p == ':')
2404 	    {
2405 		if (lp->ll_tv->v_type == VAR_DICT)
2406 		{
2407 		    if (!quiet)
2408 			EMSG(_(e_dictrange));
2409 		    if (!empty1)
2410 			clear_tv(&var1);
2411 		    return NULL;
2412 		}
2413 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2414 					       || rettv->vval.v_list == NULL))
2415 		{
2416 		    if (!quiet)
2417 			EMSG(_("E709: [:] requires a List value"));
2418 		    if (!empty1)
2419 			clear_tv(&var1);
2420 		    return NULL;
2421 		}
2422 		p = skipwhite(p + 1);
2423 		if (*p == ']')
2424 		    lp->ll_empty2 = TRUE;
2425 		else
2426 		{
2427 		    lp->ll_empty2 = FALSE;
2428 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2429 		    {
2430 			if (!empty1)
2431 			    clear_tv(&var1);
2432 			return NULL;
2433 		    }
2434 		    if (get_tv_string_chk(&var2) == NULL)
2435 		    {
2436 			/* not a number or string */
2437 			if (!empty1)
2438 			    clear_tv(&var1);
2439 			clear_tv(&var2);
2440 			return NULL;
2441 		    }
2442 		}
2443 		lp->ll_range = TRUE;
2444 	    }
2445 	    else
2446 		lp->ll_range = FALSE;
2447 
2448 	    if (*p != ']')
2449 	    {
2450 		if (!quiet)
2451 		    EMSG(_(e_missbrac));
2452 		if (!empty1)
2453 		    clear_tv(&var1);
2454 		if (lp->ll_range && !lp->ll_empty2)
2455 		    clear_tv(&var2);
2456 		return NULL;
2457 	    }
2458 
2459 	    /* Skip to past ']'. */
2460 	    ++p;
2461 	}
2462 
2463 	if (lp->ll_tv->v_type == VAR_DICT)
2464 	{
2465 	    if (len == -1)
2466 	    {
2467 		/* "[key]": get key from "var1" */
2468 		key = get_tv_string(&var1);	/* is number or string */
2469 		if (*key == NUL)
2470 		{
2471 		    if (!quiet)
2472 			EMSG(_(e_emptykey));
2473 		    clear_tv(&var1);
2474 		    return NULL;
2475 		}
2476 	    }
2477 	    lp->ll_list = NULL;
2478 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2479 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2480 	    if (lp->ll_di == NULL)
2481 	    {
2482 		/* Key does not exist in dict: may need to add it. */
2483 		if (*p == '[' || *p == '.' || unlet)
2484 		{
2485 		    if (!quiet)
2486 			EMSG2(_(e_dictkey), key);
2487 		    if (len == -1)
2488 			clear_tv(&var1);
2489 		    return NULL;
2490 		}
2491 		if (len == -1)
2492 		    lp->ll_newkey = vim_strsave(key);
2493 		else
2494 		    lp->ll_newkey = vim_strnsave(key, len);
2495 		if (len == -1)
2496 		    clear_tv(&var1);
2497 		if (lp->ll_newkey == NULL)
2498 		    p = NULL;
2499 		break;
2500 	    }
2501 	    if (len == -1)
2502 		clear_tv(&var1);
2503 	    lp->ll_tv = &lp->ll_di->di_tv;
2504 	}
2505 	else
2506 	{
2507 	    /*
2508 	     * Get the number and item for the only or first index of the List.
2509 	     */
2510 	    if (empty1)
2511 		lp->ll_n1 = 0;
2512 	    else
2513 	    {
2514 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2515 		clear_tv(&var1);
2516 	    }
2517 	    lp->ll_dict = NULL;
2518 	    lp->ll_list = lp->ll_tv->vval.v_list;
2519 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2520 	    if (lp->ll_li == NULL)
2521 	    {
2522 		if (!quiet)
2523 		    EMSGN(_(e_listidx), lp->ll_n1);
2524 		if (lp->ll_range && !lp->ll_empty2)
2525 		    clear_tv(&var2);
2526 		return NULL;
2527 	    }
2528 
2529 	    /*
2530 	     * May need to find the item or absolute index for the second
2531 	     * index of a range.
2532 	     * When no index given: "lp->ll_empty2" is TRUE.
2533 	     * Otherwise "lp->ll_n2" is set to the second index.
2534 	     */
2535 	    if (lp->ll_range && !lp->ll_empty2)
2536 	    {
2537 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2538 		clear_tv(&var2);
2539 		if (lp->ll_n2 < 0)
2540 		{
2541 		    ni = list_find(lp->ll_list, lp->ll_n2);
2542 		    if (ni == NULL)
2543 		    {
2544 			if (!quiet)
2545 			    EMSGN(_(e_listidx), lp->ll_n2);
2546 			return NULL;
2547 		    }
2548 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2549 		}
2550 
2551 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2552 		if (lp->ll_n1 < 0)
2553 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2554 		if (lp->ll_n2 < lp->ll_n1)
2555 		{
2556 		    if (!quiet)
2557 			EMSGN(_(e_listidx), lp->ll_n2);
2558 		    return NULL;
2559 		}
2560 	    }
2561 
2562 	    lp->ll_tv = &lp->ll_li->li_tv;
2563 	}
2564     }
2565 
2566     return p;
2567 }
2568 
2569 /*
2570  * Clear lval "lp" that was filled by get_lval().
2571  */
2572     static void
2573 clear_lval(lp)
2574     lval_T	*lp;
2575 {
2576     vim_free(lp->ll_exp_name);
2577     vim_free(lp->ll_newkey);
2578 }
2579 
2580 /*
2581  * Set a variable that was parsed by get_lval() to "rettv".
2582  * "endp" points to just after the parsed name.
2583  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2584  */
2585     static void
2586 set_var_lval(lp, endp, rettv, copy, op)
2587     lval_T	*lp;
2588     char_u	*endp;
2589     typval_T	*rettv;
2590     int		copy;
2591     char_u	*op;
2592 {
2593     int		cc;
2594     listitem_T	*ri;
2595     dictitem_T	*di;
2596 
2597     if (lp->ll_tv == NULL)
2598     {
2599 	if (!check_changedtick(lp->ll_name))
2600 	{
2601 	    cc = *endp;
2602 	    *endp = NUL;
2603 	    if (op != NULL && *op != '=')
2604 	    {
2605 		typval_T tv;
2606 
2607 		/* handle +=, -= and .= */
2608 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2609 							     &tv, TRUE) == OK)
2610 		{
2611 		    if (tv_op(&tv, rettv, op) == OK)
2612 			set_var(lp->ll_name, &tv, FALSE);
2613 		    clear_tv(&tv);
2614 		}
2615 	    }
2616 	    else
2617 		set_var(lp->ll_name, rettv, copy);
2618 	    *endp = cc;
2619 	}
2620     }
2621     else if (tv_check_lock(lp->ll_newkey == NULL
2622 		? lp->ll_tv->v_lock
2623 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2624 	;
2625     else if (lp->ll_range)
2626     {
2627 	/*
2628 	 * Assign the List values to the list items.
2629 	 */
2630 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2631 	{
2632 	    if (op != NULL && *op != '=')
2633 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2634 	    else
2635 	    {
2636 		clear_tv(&lp->ll_li->li_tv);
2637 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2638 	    }
2639 	    ri = ri->li_next;
2640 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2641 		break;
2642 	    if (lp->ll_li->li_next == NULL)
2643 	    {
2644 		/* Need to add an empty item. */
2645 		if (list_append_number(lp->ll_list, 0) == FAIL)
2646 		{
2647 		    ri = NULL;
2648 		    break;
2649 		}
2650 	    }
2651 	    lp->ll_li = lp->ll_li->li_next;
2652 	    ++lp->ll_n1;
2653 	}
2654 	if (ri != NULL)
2655 	    EMSG(_("E710: List value has more items than target"));
2656 	else if (lp->ll_empty2
2657 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2658 		: lp->ll_n1 != lp->ll_n2)
2659 	    EMSG(_("E711: List value has not enough items"));
2660     }
2661     else
2662     {
2663 	/*
2664 	 * Assign to a List or Dictionary item.
2665 	 */
2666 	if (lp->ll_newkey != NULL)
2667 	{
2668 	    if (op != NULL && *op != '=')
2669 	    {
2670 		EMSG2(_(e_letwrong), op);
2671 		return;
2672 	    }
2673 
2674 	    /* Need to add an item to the Dictionary. */
2675 	    di = dictitem_alloc(lp->ll_newkey);
2676 	    if (di == NULL)
2677 		return;
2678 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2679 	    {
2680 		vim_free(di);
2681 		return;
2682 	    }
2683 	    lp->ll_tv = &di->di_tv;
2684 	}
2685 	else if (op != NULL && *op != '=')
2686 	{
2687 	    tv_op(lp->ll_tv, rettv, op);
2688 	    return;
2689 	}
2690 	else
2691 	    clear_tv(lp->ll_tv);
2692 
2693 	/*
2694 	 * Assign the value to the variable or list item.
2695 	 */
2696 	if (copy)
2697 	    copy_tv(rettv, lp->ll_tv);
2698 	else
2699 	{
2700 	    *lp->ll_tv = *rettv;
2701 	    lp->ll_tv->v_lock = 0;
2702 	    init_tv(rettv);
2703 	}
2704     }
2705 }
2706 
2707 /*
2708  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2709  * Returns OK or FAIL.
2710  */
2711     static int
2712 tv_op(tv1, tv2, op)
2713     typval_T *tv1;
2714     typval_T *tv2;
2715     char_u  *op;
2716 {
2717     long	n;
2718     char_u	numbuf[NUMBUFLEN];
2719     char_u	*s;
2720 
2721     /* Can't do anything with a Funcref or a Dict on the right. */
2722     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2723     {
2724 	switch (tv1->v_type)
2725 	{
2726 	    case VAR_DICT:
2727 	    case VAR_FUNC:
2728 		break;
2729 
2730 	    case VAR_LIST:
2731 		if (*op != '+' || tv2->v_type != VAR_LIST)
2732 		    break;
2733 		/* List += List */
2734 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2735 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2736 		return OK;
2737 
2738 	    case VAR_NUMBER:
2739 	    case VAR_STRING:
2740 		if (tv2->v_type == VAR_LIST)
2741 		    break;
2742 		if (*op == '+' || *op == '-')
2743 		{
2744 		    /* nr += nr  or  nr -= nr*/
2745 		    n = get_tv_number(tv1);
2746 		    if (*op == '+')
2747 			n += get_tv_number(tv2);
2748 		    else
2749 			n -= get_tv_number(tv2);
2750 		    clear_tv(tv1);
2751 		    tv1->v_type = VAR_NUMBER;
2752 		    tv1->vval.v_number = n;
2753 		}
2754 		else
2755 		{
2756 		    /* str .= str */
2757 		    s = get_tv_string(tv1);
2758 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2759 		    clear_tv(tv1);
2760 		    tv1->v_type = VAR_STRING;
2761 		    tv1->vval.v_string = s;
2762 		}
2763 		return OK;
2764 	}
2765     }
2766 
2767     EMSG2(_(e_letwrong), op);
2768     return FAIL;
2769 }
2770 
2771 /*
2772  * Add a watcher to a list.
2773  */
2774     static void
2775 list_add_watch(l, lw)
2776     list_T	*l;
2777     listwatch_T	*lw;
2778 {
2779     lw->lw_next = l->lv_watch;
2780     l->lv_watch = lw;
2781 }
2782 
2783 /*
2784  * Remove a watcher from a list.
2785  * No warning when it isn't found...
2786  */
2787     static void
2788 list_rem_watch(l, lwrem)
2789     list_T	*l;
2790     listwatch_T	*lwrem;
2791 {
2792     listwatch_T	*lw, **lwp;
2793 
2794     lwp = &l->lv_watch;
2795     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2796     {
2797 	if (lw == lwrem)
2798 	{
2799 	    *lwp = lw->lw_next;
2800 	    break;
2801 	}
2802 	lwp = &lw->lw_next;
2803     }
2804 }
2805 
2806 /*
2807  * Just before removing an item from a list: advance watchers to the next
2808  * item.
2809  */
2810     static void
2811 list_fix_watch(l, item)
2812     list_T	*l;
2813     listitem_T	*item;
2814 {
2815     listwatch_T	*lw;
2816 
2817     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2818 	if (lw->lw_item == item)
2819 	    lw->lw_item = item->li_next;
2820 }
2821 
2822 /*
2823  * Evaluate the expression used in a ":for var in expr" command.
2824  * "arg" points to "var".
2825  * Set "*errp" to TRUE for an error, FALSE otherwise;
2826  * Return a pointer that holds the info.  Null when there is an error.
2827  */
2828     void *
2829 eval_for_line(arg, errp, nextcmdp, skip)
2830     char_u	*arg;
2831     int		*errp;
2832     char_u	**nextcmdp;
2833     int		skip;
2834 {
2835     forinfo_T	*fi;
2836     char_u	*expr;
2837     typval_T	tv;
2838     list_T	*l;
2839 
2840     *errp = TRUE;	/* default: there is an error */
2841 
2842     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2843     if (fi == NULL)
2844 	return NULL;
2845 
2846     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2847     if (expr == NULL)
2848 	return fi;
2849 
2850     expr = skipwhite(expr);
2851     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2852     {
2853 	EMSG(_("E690: Missing \"in\" after :for"));
2854 	return fi;
2855     }
2856 
2857     if (skip)
2858 	++emsg_skip;
2859     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2860     {
2861 	*errp = FALSE;
2862 	if (!skip)
2863 	{
2864 	    l = tv.vval.v_list;
2865 	    if (tv.v_type != VAR_LIST || l == NULL)
2866 	    {
2867 		EMSG(_(e_listreq));
2868 		clear_tv(&tv);
2869 	    }
2870 	    else
2871 	    {
2872 		/* No need to increment the refcount, it's already set for the
2873 		 * list being used in "tv". */
2874 		fi->fi_list = l;
2875 		list_add_watch(l, &fi->fi_lw);
2876 		fi->fi_lw.lw_item = l->lv_first;
2877 	    }
2878 	}
2879     }
2880     if (skip)
2881 	--emsg_skip;
2882 
2883     return fi;
2884 }
2885 
2886 /*
2887  * Use the first item in a ":for" list.  Advance to the next.
2888  * Assign the values to the variable (list).  "arg" points to the first one.
2889  * Return TRUE when a valid item was found, FALSE when at end of list or
2890  * something wrong.
2891  */
2892     int
2893 next_for_item(fi_void, arg)
2894     void	*fi_void;
2895     char_u	*arg;
2896 {
2897     forinfo_T    *fi = (forinfo_T *)fi_void;
2898     int		result;
2899     listitem_T	*item;
2900 
2901     item = fi->fi_lw.lw_item;
2902     if (item == NULL)
2903 	result = FALSE;
2904     else
2905     {
2906 	fi->fi_lw.lw_item = item->li_next;
2907 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2908 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2909     }
2910     return result;
2911 }
2912 
2913 /*
2914  * Free the structure used to store info used by ":for".
2915  */
2916     void
2917 free_for_info(fi_void)
2918     void *fi_void;
2919 {
2920     forinfo_T    *fi = (forinfo_T *)fi_void;
2921 
2922     if (fi != NULL && fi->fi_list != NULL)
2923     {
2924 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2925 	list_unref(fi->fi_list);
2926     }
2927     vim_free(fi);
2928 }
2929 
2930 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2931 
2932     void
2933 set_context_for_expression(xp, arg, cmdidx)
2934     expand_T	*xp;
2935     char_u	*arg;
2936     cmdidx_T	cmdidx;
2937 {
2938     int		got_eq = FALSE;
2939     int		c;
2940     char_u	*p;
2941 
2942     if (cmdidx == CMD_let)
2943     {
2944 	xp->xp_context = EXPAND_USER_VARS;
2945 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2946 	{
2947 	    /* ":let var1 var2 ...": find last space. */
2948 	    for (p = arg + STRLEN(arg); p >= arg; )
2949 	    {
2950 		xp->xp_pattern = p;
2951 		mb_ptr_back(arg, p);
2952 		if (vim_iswhite(*p))
2953 		    break;
2954 	    }
2955 	    return;
2956 	}
2957     }
2958     else
2959 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2960 							  : EXPAND_EXPRESSION;
2961     while ((xp->xp_pattern = vim_strpbrk(arg,
2962 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2963     {
2964 	c = *xp->xp_pattern;
2965 	if (c == '&')
2966 	{
2967 	    c = xp->xp_pattern[1];
2968 	    if (c == '&')
2969 	    {
2970 		++xp->xp_pattern;
2971 		xp->xp_context = cmdidx != CMD_let || got_eq
2972 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2973 	    }
2974 	    else if (c != ' ')
2975 	    {
2976 		xp->xp_context = EXPAND_SETTINGS;
2977 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2978 		    xp->xp_pattern += 2;
2979 
2980 	    }
2981 	}
2982 	else if (c == '$')
2983 	{
2984 	    /* environment variable */
2985 	    xp->xp_context = EXPAND_ENV_VARS;
2986 	}
2987 	else if (c == '=')
2988 	{
2989 	    got_eq = TRUE;
2990 	    xp->xp_context = EXPAND_EXPRESSION;
2991 	}
2992 	else if (c == '<'
2993 		&& xp->xp_context == EXPAND_FUNCTIONS
2994 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2995 	{
2996 	    /* Function name can start with "<SNR>" */
2997 	    break;
2998 	}
2999 	else if (cmdidx != CMD_let || got_eq)
3000 	{
3001 	    if (c == '"')	    /* string */
3002 	    {
3003 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
3004 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
3005 			++xp->xp_pattern;
3006 		xp->xp_context = EXPAND_NOTHING;
3007 	    }
3008 	    else if (c == '\'')	    /* literal string */
3009 	    {
3010 		/* Trick: '' is like stopping and starting a literal string. */
3011 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
3012 		    /* skip */ ;
3013 		xp->xp_context = EXPAND_NOTHING;
3014 	    }
3015 	    else if (c == '|')
3016 	    {
3017 		if (xp->xp_pattern[1] == '|')
3018 		{
3019 		    ++xp->xp_pattern;
3020 		    xp->xp_context = EXPAND_EXPRESSION;
3021 		}
3022 		else
3023 		    xp->xp_context = EXPAND_COMMANDS;
3024 	    }
3025 	    else
3026 		xp->xp_context = EXPAND_EXPRESSION;
3027 	}
3028 	else
3029 	    /* Doesn't look like something valid, expand as an expression
3030 	     * anyway. */
3031 	    xp->xp_context = EXPAND_EXPRESSION;
3032 	arg = xp->xp_pattern;
3033 	if (*arg != NUL)
3034 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
3035 		/* skip */ ;
3036     }
3037     xp->xp_pattern = arg;
3038 }
3039 
3040 #endif /* FEAT_CMDL_COMPL */
3041 
3042 /*
3043  * ":1,25call func(arg1, arg2)"	function call.
3044  */
3045     void
3046 ex_call(eap)
3047     exarg_T	*eap;
3048 {
3049     char_u	*arg = eap->arg;
3050     char_u	*startarg;
3051     char_u	*name;
3052     char_u	*tofree;
3053     int		len;
3054     typval_T	rettv;
3055     linenr_T	lnum;
3056     int		doesrange;
3057     int		failed = FALSE;
3058     funcdict_T	fudi;
3059 
3060     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3061     vim_free(fudi.fd_newkey);
3062     if (tofree == NULL)
3063 	return;
3064 
3065     /* Increase refcount on dictionary, it could get deleted when evaluating
3066      * the arguments. */
3067     if (fudi.fd_dict != NULL)
3068 	++fudi.fd_dict->dv_refcount;
3069 
3070     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3071     len = STRLEN(tofree);
3072     name = deref_func_name(tofree, &len);
3073 
3074     /* Skip white space to allow ":call func ()".  Not good, but required for
3075      * backward compatibility. */
3076     startarg = skipwhite(arg);
3077     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3078 
3079     if (*startarg != '(')
3080     {
3081 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3082 	goto end;
3083     }
3084 
3085     /*
3086      * When skipping, evaluate the function once, to find the end of the
3087      * arguments.
3088      * When the function takes a range, this is discovered after the first
3089      * call, and the loop is broken.
3090      */
3091     if (eap->skip)
3092     {
3093 	++emsg_skip;
3094 	lnum = eap->line2;	/* do it once, also with an invalid range */
3095     }
3096     else
3097 	lnum = eap->line1;
3098     for ( ; lnum <= eap->line2; ++lnum)
3099     {
3100 	if (!eap->skip && eap->addr_count > 0)
3101 	{
3102 	    curwin->w_cursor.lnum = lnum;
3103 	    curwin->w_cursor.col = 0;
3104 	}
3105 	arg = startarg;
3106 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3107 		    eap->line1, eap->line2, &doesrange,
3108 					    !eap->skip, fudi.fd_dict) == FAIL)
3109 	{
3110 	    failed = TRUE;
3111 	    break;
3112 	}
3113 	clear_tv(&rettv);
3114 	if (doesrange || eap->skip)
3115 	    break;
3116 	/* Stop when immediately aborting on error, or when an interrupt
3117 	 * occurred or an exception was thrown but not caught.
3118 	 * get_func_tv() returned OK, so that the check for trailing
3119 	 * characters below is executed. */
3120 	if (aborting())
3121 	    break;
3122     }
3123     if (eap->skip)
3124 	--emsg_skip;
3125 
3126     if (!failed)
3127     {
3128 	/* Check for trailing illegal characters and a following command. */
3129 	if (!ends_excmd(*arg))
3130 	{
3131 	    emsg_severe = TRUE;
3132 	    EMSG(_(e_trailing));
3133 	}
3134 	else
3135 	    eap->nextcmd = check_nextcmd(arg);
3136     }
3137 
3138 end:
3139     dict_unref(fudi.fd_dict);
3140     vim_free(tofree);
3141 }
3142 
3143 /*
3144  * ":unlet[!] var1 ... " command.
3145  */
3146     void
3147 ex_unlet(eap)
3148     exarg_T	*eap;
3149 {
3150     ex_unletlock(eap, eap->arg, 0);
3151 }
3152 
3153 /*
3154  * ":lockvar" and ":unlockvar" commands
3155  */
3156     void
3157 ex_lockvar(eap)
3158     exarg_T	*eap;
3159 {
3160     char_u	*arg = eap->arg;
3161     int		deep = 2;
3162 
3163     if (eap->forceit)
3164 	deep = -1;
3165     else if (vim_isdigit(*arg))
3166     {
3167 	deep = getdigits(&arg);
3168 	arg = skipwhite(arg);
3169     }
3170 
3171     ex_unletlock(eap, arg, deep);
3172 }
3173 
3174 /*
3175  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3176  */
3177     static void
3178 ex_unletlock(eap, argstart, deep)
3179     exarg_T	*eap;
3180     char_u	*argstart;
3181     int		deep;
3182 {
3183     char_u	*arg = argstart;
3184     char_u	*name_end;
3185     int		error = FALSE;
3186     lval_T	lv;
3187 
3188     do
3189     {
3190 	/* Parse the name and find the end. */
3191 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3192 							     FNE_CHECK_START);
3193 	if (lv.ll_name == NULL)
3194 	    error = TRUE;	    /* error but continue parsing */
3195 	if (name_end == NULL || (!vim_iswhite(*name_end)
3196 						   && !ends_excmd(*name_end)))
3197 	{
3198 	    if (name_end != NULL)
3199 	    {
3200 		emsg_severe = TRUE;
3201 		EMSG(_(e_trailing));
3202 	    }
3203 	    if (!(eap->skip || error))
3204 		clear_lval(&lv);
3205 	    break;
3206 	}
3207 
3208 	if (!error && !eap->skip)
3209 	{
3210 	    if (eap->cmdidx == CMD_unlet)
3211 	    {
3212 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3213 		    error = TRUE;
3214 	    }
3215 	    else
3216 	    {
3217 		if (do_lock_var(&lv, name_end, deep,
3218 					  eap->cmdidx == CMD_lockvar) == FAIL)
3219 		    error = TRUE;
3220 	    }
3221 	}
3222 
3223 	if (!eap->skip)
3224 	    clear_lval(&lv);
3225 
3226 	arg = skipwhite(name_end);
3227     } while (!ends_excmd(*arg));
3228 
3229     eap->nextcmd = check_nextcmd(arg);
3230 }
3231 
3232     static int
3233 do_unlet_var(lp, name_end, forceit)
3234     lval_T	*lp;
3235     char_u	*name_end;
3236     int		forceit;
3237 {
3238     int		ret = OK;
3239     int		cc;
3240 
3241     if (lp->ll_tv == NULL)
3242     {
3243 	cc = *name_end;
3244 	*name_end = NUL;
3245 
3246 	/* Normal name or expanded name. */
3247 	if (check_changedtick(lp->ll_name))
3248 	    ret = FAIL;
3249 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3250 	    ret = FAIL;
3251 	*name_end = cc;
3252     }
3253     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3254 	return FAIL;
3255     else if (lp->ll_range)
3256     {
3257 	listitem_T    *li;
3258 
3259 	/* Delete a range of List items. */
3260 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3261 	{
3262 	    li = lp->ll_li->li_next;
3263 	    listitem_remove(lp->ll_list, lp->ll_li);
3264 	    lp->ll_li = li;
3265 	    ++lp->ll_n1;
3266 	}
3267     }
3268     else
3269     {
3270 	if (lp->ll_list != NULL)
3271 	    /* unlet a List item. */
3272 	    listitem_remove(lp->ll_list, lp->ll_li);
3273 	else
3274 	    /* unlet a Dictionary item. */
3275 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3276     }
3277 
3278     return ret;
3279 }
3280 
3281 /*
3282  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3283  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3284  */
3285     int
3286 do_unlet(name, forceit)
3287     char_u	*name;
3288     int		forceit;
3289 {
3290     hashtab_T	*ht;
3291     hashitem_T	*hi;
3292     char_u	*varname;
3293 
3294     ht = find_var_ht(name, &varname);
3295     if (ht != NULL && *varname != NUL)
3296     {
3297 	hi = hash_find(ht, varname);
3298 	if (!HASHITEM_EMPTY(hi))
3299 	{
3300 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3301 		return FAIL;
3302 	    delete_var(ht, hi);
3303 	    return OK;
3304 	}
3305     }
3306     if (forceit)
3307 	return OK;
3308     EMSG2(_("E108: No such variable: \"%s\""), name);
3309     return FAIL;
3310 }
3311 
3312 /*
3313  * Lock or unlock variable indicated by "lp".
3314  * "deep" is the levels to go (-1 for unlimited);
3315  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3316  */
3317     static int
3318 do_lock_var(lp, name_end, deep, lock)
3319     lval_T	*lp;
3320     char_u	*name_end;
3321     int		deep;
3322     int		lock;
3323 {
3324     int		ret = OK;
3325     int		cc;
3326     dictitem_T	*di;
3327 
3328     if (deep == 0)	/* nothing to do */
3329 	return OK;
3330 
3331     if (lp->ll_tv == NULL)
3332     {
3333 	cc = *name_end;
3334 	*name_end = NUL;
3335 
3336 	/* Normal name or expanded name. */
3337 	if (check_changedtick(lp->ll_name))
3338 	    ret = FAIL;
3339 	else
3340 	{
3341 	    di = find_var(lp->ll_name, NULL);
3342 	    if (di == NULL)
3343 		ret = FAIL;
3344 	    else
3345 	    {
3346 		if (lock)
3347 		    di->di_flags |= DI_FLAGS_LOCK;
3348 		else
3349 		    di->di_flags &= ~DI_FLAGS_LOCK;
3350 		item_lock(&di->di_tv, deep, lock);
3351 	    }
3352 	}
3353 	*name_end = cc;
3354     }
3355     else if (lp->ll_range)
3356     {
3357 	listitem_T    *li = lp->ll_li;
3358 
3359 	/* (un)lock a range of List items. */
3360 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3361 	{
3362 	    item_lock(&li->li_tv, deep, lock);
3363 	    li = li->li_next;
3364 	    ++lp->ll_n1;
3365 	}
3366     }
3367     else if (lp->ll_list != NULL)
3368 	/* (un)lock a List item. */
3369 	item_lock(&lp->ll_li->li_tv, deep, lock);
3370     else
3371 	/* un(lock) a Dictionary item. */
3372 	item_lock(&lp->ll_di->di_tv, deep, lock);
3373 
3374     return ret;
3375 }
3376 
3377 /*
3378  * Lock or unlock an item.  "deep" is nr of levels to go.
3379  */
3380     static void
3381 item_lock(tv, deep, lock)
3382     typval_T	*tv;
3383     int		deep;
3384     int		lock;
3385 {
3386     static int	recurse = 0;
3387     list_T	*l;
3388     listitem_T	*li;
3389     dict_T	*d;
3390     hashitem_T	*hi;
3391     int		todo;
3392 
3393     if (recurse >= DICT_MAXNEST)
3394     {
3395 	EMSG(_("E743: variable nested too deep for (un)lock"));
3396 	return;
3397     }
3398     if (deep == 0)
3399 	return;
3400     ++recurse;
3401 
3402     /* lock/unlock the item itself */
3403     if (lock)
3404 	tv->v_lock |= VAR_LOCKED;
3405     else
3406 	tv->v_lock &= ~VAR_LOCKED;
3407 
3408     switch (tv->v_type)
3409     {
3410 	case VAR_LIST:
3411 	    if ((l = tv->vval.v_list) != NULL)
3412 	    {
3413 		if (lock)
3414 		    l->lv_lock |= VAR_LOCKED;
3415 		else
3416 		    l->lv_lock &= ~VAR_LOCKED;
3417 		if (deep < 0 || deep > 1)
3418 		    /* recursive: lock/unlock the items the List contains */
3419 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3420 			item_lock(&li->li_tv, deep - 1, lock);
3421 	    }
3422 	    break;
3423 	case VAR_DICT:
3424 	    if ((d = tv->vval.v_dict) != NULL)
3425 	    {
3426 		if (lock)
3427 		    d->dv_lock |= VAR_LOCKED;
3428 		else
3429 		    d->dv_lock &= ~VAR_LOCKED;
3430 		if (deep < 0 || deep > 1)
3431 		{
3432 		    /* recursive: lock/unlock the items the List contains */
3433 		    todo = d->dv_hashtab.ht_used;
3434 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3435 		    {
3436 			if (!HASHITEM_EMPTY(hi))
3437 			{
3438 			    --todo;
3439 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3440 			}
3441 		    }
3442 		}
3443 	    }
3444     }
3445     --recurse;
3446 }
3447 
3448 /*
3449  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3450  * it refers to a List or Dictionary that is locked.
3451  */
3452     static int
3453 tv_islocked(tv)
3454     typval_T	*tv;
3455 {
3456     return (tv->v_lock & VAR_LOCKED)
3457 	|| (tv->v_type == VAR_LIST
3458 		&& tv->vval.v_list != NULL
3459 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3460 	|| (tv->v_type == VAR_DICT
3461 		&& tv->vval.v_dict != NULL
3462 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3463 }
3464 
3465 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3466 /*
3467  * Delete all "menutrans_" variables.
3468  */
3469     void
3470 del_menutrans_vars()
3471 {
3472     hashitem_T	*hi;
3473     int		todo;
3474 
3475     hash_lock(&globvarht);
3476     todo = globvarht.ht_used;
3477     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3478     {
3479 	if (!HASHITEM_EMPTY(hi))
3480 	{
3481 	    --todo;
3482 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3483 		delete_var(&globvarht, hi);
3484 	}
3485     }
3486     hash_unlock(&globvarht);
3487 }
3488 #endif
3489 
3490 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3491 
3492 /*
3493  * Local string buffer for the next two functions to store a variable name
3494  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3495  * get_user_var_name().
3496  */
3497 
3498 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3499 
3500 static char_u	*varnamebuf = NULL;
3501 static int	varnamebuflen = 0;
3502 
3503 /*
3504  * Function to concatenate a prefix and a variable name.
3505  */
3506     static char_u *
3507 cat_prefix_varname(prefix, name)
3508     int		prefix;
3509     char_u	*name;
3510 {
3511     int		len;
3512 
3513     len = (int)STRLEN(name) + 3;
3514     if (len > varnamebuflen)
3515     {
3516 	vim_free(varnamebuf);
3517 	len += 10;			/* some additional space */
3518 	varnamebuf = alloc(len);
3519 	if (varnamebuf == NULL)
3520 	{
3521 	    varnamebuflen = 0;
3522 	    return NULL;
3523 	}
3524 	varnamebuflen = len;
3525     }
3526     *varnamebuf = prefix;
3527     varnamebuf[1] = ':';
3528     STRCPY(varnamebuf + 2, name);
3529     return varnamebuf;
3530 }
3531 
3532 /*
3533  * Function given to ExpandGeneric() to obtain the list of user defined
3534  * (global/buffer/window/built-in) variable names.
3535  */
3536 /*ARGSUSED*/
3537     char_u *
3538 get_user_var_name(xp, idx)
3539     expand_T	*xp;
3540     int		idx;
3541 {
3542     static long_u	gdone;
3543     static long_u	bdone;
3544     static long_u	wdone;
3545     static int		vidx;
3546     static hashitem_T	*hi;
3547     hashtab_T		*ht;
3548 
3549     if (idx == 0)
3550 	gdone = bdone = wdone = vidx = 0;
3551 
3552     /* Global variables */
3553     if (gdone < globvarht.ht_used)
3554     {
3555 	if (gdone++ == 0)
3556 	    hi = globvarht.ht_array;
3557 	else
3558 	    ++hi;
3559 	while (HASHITEM_EMPTY(hi))
3560 	    ++hi;
3561 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3562 	    return cat_prefix_varname('g', hi->hi_key);
3563 	return hi->hi_key;
3564     }
3565 
3566     /* b: variables */
3567     ht = &curbuf->b_vars.dv_hashtab;
3568     if (bdone < ht->ht_used)
3569     {
3570 	if (bdone++ == 0)
3571 	    hi = ht->ht_array;
3572 	else
3573 	    ++hi;
3574 	while (HASHITEM_EMPTY(hi))
3575 	    ++hi;
3576 	return cat_prefix_varname('b', hi->hi_key);
3577     }
3578     if (bdone == ht->ht_used)
3579     {
3580 	++bdone;
3581 	return (char_u *)"b:changedtick";
3582     }
3583 
3584     /* w: variables */
3585     ht = &curwin->w_vars.dv_hashtab;
3586     if (wdone < ht->ht_used)
3587     {
3588 	if (wdone++ == 0)
3589 	    hi = ht->ht_array;
3590 	else
3591 	    ++hi;
3592 	while (HASHITEM_EMPTY(hi))
3593 	    ++hi;
3594 	return cat_prefix_varname('w', hi->hi_key);
3595     }
3596 
3597     /* v: variables */
3598     if (vidx < VV_LEN)
3599 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3600 
3601     vim_free(varnamebuf);
3602     varnamebuf = NULL;
3603     varnamebuflen = 0;
3604     return NULL;
3605 }
3606 
3607 #endif /* FEAT_CMDL_COMPL */
3608 
3609 /*
3610  * types for expressions.
3611  */
3612 typedef enum
3613 {
3614     TYPE_UNKNOWN = 0
3615     , TYPE_EQUAL	/* == */
3616     , TYPE_NEQUAL	/* != */
3617     , TYPE_GREATER	/* >  */
3618     , TYPE_GEQUAL	/* >= */
3619     , TYPE_SMALLER	/* <  */
3620     , TYPE_SEQUAL	/* <= */
3621     , TYPE_MATCH	/* =~ */
3622     , TYPE_NOMATCH	/* !~ */
3623 } exptype_T;
3624 
3625 /*
3626  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3627  * executed.  The function may return OK, but the rettv will be of type
3628  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3629  */
3630 
3631 /*
3632  * Handle zero level expression.
3633  * This calls eval1() and handles error message and nextcmd.
3634  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3635  * Note: "rettv.v_lock" is not set.
3636  * Return OK or FAIL.
3637  */
3638     static int
3639 eval0(arg, rettv, nextcmd, evaluate)
3640     char_u	*arg;
3641     typval_T	*rettv;
3642     char_u	**nextcmd;
3643     int		evaluate;
3644 {
3645     int		ret;
3646     char_u	*p;
3647 
3648     p = skipwhite(arg);
3649     ret = eval1(&p, rettv, evaluate);
3650     if (ret == FAIL || !ends_excmd(*p))
3651     {
3652 	if (ret != FAIL)
3653 	    clear_tv(rettv);
3654 	/*
3655 	 * Report the invalid expression unless the expression evaluation has
3656 	 * been cancelled due to an aborting error, an interrupt, or an
3657 	 * exception.
3658 	 */
3659 	if (!aborting())
3660 	    EMSG2(_(e_invexpr2), arg);
3661 	ret = FAIL;
3662     }
3663     if (nextcmd != NULL)
3664 	*nextcmd = check_nextcmd(p);
3665 
3666     return ret;
3667 }
3668 
3669 /*
3670  * Handle top level expression:
3671  *	expr1 ? expr0 : expr0
3672  *
3673  * "arg" must point to the first non-white of the expression.
3674  * "arg" is advanced to the next non-white after the recognized expression.
3675  *
3676  * Note: "rettv.v_lock" is not set.
3677  *
3678  * Return OK or FAIL.
3679  */
3680     static int
3681 eval1(arg, rettv, evaluate)
3682     char_u	**arg;
3683     typval_T	*rettv;
3684     int		evaluate;
3685 {
3686     int		result;
3687     typval_T	var2;
3688 
3689     /*
3690      * Get the first variable.
3691      */
3692     if (eval2(arg, rettv, evaluate) == FAIL)
3693 	return FAIL;
3694 
3695     if ((*arg)[0] == '?')
3696     {
3697 	result = FALSE;
3698 	if (evaluate)
3699 	{
3700 	    int		error = FALSE;
3701 
3702 	    if (get_tv_number_chk(rettv, &error) != 0)
3703 		result = TRUE;
3704 	    clear_tv(rettv);
3705 	    if (error)
3706 		return FAIL;
3707 	}
3708 
3709 	/*
3710 	 * Get the second variable.
3711 	 */
3712 	*arg = skipwhite(*arg + 1);
3713 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3714 	    return FAIL;
3715 
3716 	/*
3717 	 * Check for the ":".
3718 	 */
3719 	if ((*arg)[0] != ':')
3720 	{
3721 	    EMSG(_("E109: Missing ':' after '?'"));
3722 	    if (evaluate && result)
3723 		clear_tv(rettv);
3724 	    return FAIL;
3725 	}
3726 
3727 	/*
3728 	 * Get the third variable.
3729 	 */
3730 	*arg = skipwhite(*arg + 1);
3731 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3732 	{
3733 	    if (evaluate && result)
3734 		clear_tv(rettv);
3735 	    return FAIL;
3736 	}
3737 	if (evaluate && !result)
3738 	    *rettv = var2;
3739     }
3740 
3741     return OK;
3742 }
3743 
3744 /*
3745  * Handle first level expression:
3746  *	expr2 || expr2 || expr2	    logical OR
3747  *
3748  * "arg" must point to the first non-white of the expression.
3749  * "arg" is advanced to the next non-white after the recognized expression.
3750  *
3751  * Return OK or FAIL.
3752  */
3753     static int
3754 eval2(arg, rettv, evaluate)
3755     char_u	**arg;
3756     typval_T	*rettv;
3757     int		evaluate;
3758 {
3759     typval_T	var2;
3760     long	result;
3761     int		first;
3762     int		error = FALSE;
3763 
3764     /*
3765      * Get the first variable.
3766      */
3767     if (eval3(arg, rettv, evaluate) == FAIL)
3768 	return FAIL;
3769 
3770     /*
3771      * Repeat until there is no following "||".
3772      */
3773     first = TRUE;
3774     result = FALSE;
3775     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3776     {
3777 	if (evaluate && first)
3778 	{
3779 	    if (get_tv_number_chk(rettv, &error) != 0)
3780 		result = TRUE;
3781 	    clear_tv(rettv);
3782 	    if (error)
3783 		return FAIL;
3784 	    first = FALSE;
3785 	}
3786 
3787 	/*
3788 	 * Get the second variable.
3789 	 */
3790 	*arg = skipwhite(*arg + 2);
3791 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3792 	    return FAIL;
3793 
3794 	/*
3795 	 * Compute the result.
3796 	 */
3797 	if (evaluate && !result)
3798 	{
3799 	    if (get_tv_number_chk(&var2, &error) != 0)
3800 		result = TRUE;
3801 	    clear_tv(&var2);
3802 	    if (error)
3803 		return FAIL;
3804 	}
3805 	if (evaluate)
3806 	{
3807 	    rettv->v_type = VAR_NUMBER;
3808 	    rettv->vval.v_number = result;
3809 	}
3810     }
3811 
3812     return OK;
3813 }
3814 
3815 /*
3816  * Handle second level expression:
3817  *	expr3 && expr3 && expr3	    logical AND
3818  *
3819  * "arg" must point to the first non-white of the expression.
3820  * "arg" is advanced to the next non-white after the recognized expression.
3821  *
3822  * Return OK or FAIL.
3823  */
3824     static int
3825 eval3(arg, rettv, evaluate)
3826     char_u	**arg;
3827     typval_T	*rettv;
3828     int		evaluate;
3829 {
3830     typval_T	var2;
3831     long	result;
3832     int		first;
3833     int		error = FALSE;
3834 
3835     /*
3836      * Get the first variable.
3837      */
3838     if (eval4(arg, rettv, evaluate) == FAIL)
3839 	return FAIL;
3840 
3841     /*
3842      * Repeat until there is no following "&&".
3843      */
3844     first = TRUE;
3845     result = TRUE;
3846     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3847     {
3848 	if (evaluate && first)
3849 	{
3850 	    if (get_tv_number_chk(rettv, &error) == 0)
3851 		result = FALSE;
3852 	    clear_tv(rettv);
3853 	    if (error)
3854 		return FAIL;
3855 	    first = FALSE;
3856 	}
3857 
3858 	/*
3859 	 * Get the second variable.
3860 	 */
3861 	*arg = skipwhite(*arg + 2);
3862 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3863 	    return FAIL;
3864 
3865 	/*
3866 	 * Compute the result.
3867 	 */
3868 	if (evaluate && result)
3869 	{
3870 	    if (get_tv_number_chk(&var2, &error) == 0)
3871 		result = FALSE;
3872 	    clear_tv(&var2);
3873 	    if (error)
3874 		return FAIL;
3875 	}
3876 	if (evaluate)
3877 	{
3878 	    rettv->v_type = VAR_NUMBER;
3879 	    rettv->vval.v_number = result;
3880 	}
3881     }
3882 
3883     return OK;
3884 }
3885 
3886 /*
3887  * Handle third level expression:
3888  *	var1 == var2
3889  *	var1 =~ var2
3890  *	var1 != var2
3891  *	var1 !~ var2
3892  *	var1 > var2
3893  *	var1 >= var2
3894  *	var1 < var2
3895  *	var1 <= var2
3896  *	var1 is var2
3897  *	var1 isnot var2
3898  *
3899  * "arg" must point to the first non-white of the expression.
3900  * "arg" is advanced to the next non-white after the recognized expression.
3901  *
3902  * Return OK or FAIL.
3903  */
3904     static int
3905 eval4(arg, rettv, evaluate)
3906     char_u	**arg;
3907     typval_T	*rettv;
3908     int		evaluate;
3909 {
3910     typval_T	var2;
3911     char_u	*p;
3912     int		i;
3913     exptype_T	type = TYPE_UNKNOWN;
3914     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3915     int		len = 2;
3916     long	n1, n2;
3917     char_u	*s1, *s2;
3918     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3919     regmatch_T	regmatch;
3920     int		ic;
3921     char_u	*save_cpo;
3922 
3923     /*
3924      * Get the first variable.
3925      */
3926     if (eval5(arg, rettv, evaluate) == FAIL)
3927 	return FAIL;
3928 
3929     p = *arg;
3930     switch (p[0])
3931     {
3932 	case '=':   if (p[1] == '=')
3933 			type = TYPE_EQUAL;
3934 		    else if (p[1] == '~')
3935 			type = TYPE_MATCH;
3936 		    break;
3937 	case '!':   if (p[1] == '=')
3938 			type = TYPE_NEQUAL;
3939 		    else if (p[1] == '~')
3940 			type = TYPE_NOMATCH;
3941 		    break;
3942 	case '>':   if (p[1] != '=')
3943 		    {
3944 			type = TYPE_GREATER;
3945 			len = 1;
3946 		    }
3947 		    else
3948 			type = TYPE_GEQUAL;
3949 		    break;
3950 	case '<':   if (p[1] != '=')
3951 		    {
3952 			type = TYPE_SMALLER;
3953 			len = 1;
3954 		    }
3955 		    else
3956 			type = TYPE_SEQUAL;
3957 		    break;
3958 	case 'i':   if (p[1] == 's')
3959 		    {
3960 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3961 			    len = 5;
3962 			if (!vim_isIDc(p[len]))
3963 			{
3964 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3965 			    type_is = TRUE;
3966 			}
3967 		    }
3968 		    break;
3969     }
3970 
3971     /*
3972      * If there is a comparitive operator, use it.
3973      */
3974     if (type != TYPE_UNKNOWN)
3975     {
3976 	/* extra question mark appended: ignore case */
3977 	if (p[len] == '?')
3978 	{
3979 	    ic = TRUE;
3980 	    ++len;
3981 	}
3982 	/* extra '#' appended: match case */
3983 	else if (p[len] == '#')
3984 	{
3985 	    ic = FALSE;
3986 	    ++len;
3987 	}
3988 	/* nothing appened: use 'ignorecase' */
3989 	else
3990 	    ic = p_ic;
3991 
3992 	/*
3993 	 * Get the second variable.
3994 	 */
3995 	*arg = skipwhite(p + len);
3996 	if (eval5(arg, &var2, evaluate) == FAIL)
3997 	{
3998 	    clear_tv(rettv);
3999 	    return FAIL;
4000 	}
4001 
4002 	if (evaluate)
4003 	{
4004 	    if (type_is && rettv->v_type != var2.v_type)
4005 	    {
4006 		/* For "is" a different type always means FALSE, for "notis"
4007 		 * it means TRUE. */
4008 		n1 = (type == TYPE_NEQUAL);
4009 	    }
4010 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
4011 	    {
4012 		if (type_is)
4013 		{
4014 		    n1 = (rettv->v_type == var2.v_type
4015 				   && rettv->vval.v_list == var2.vval.v_list);
4016 		    if (type == TYPE_NEQUAL)
4017 			n1 = !n1;
4018 		}
4019 		else if (rettv->v_type != var2.v_type
4020 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4021 		{
4022 		    if (rettv->v_type != var2.v_type)
4023 			EMSG(_("E691: Can only compare List with List"));
4024 		    else
4025 			EMSG(_("E692: Invalid operation for Lists"));
4026 		    clear_tv(rettv);
4027 		    clear_tv(&var2);
4028 		    return FAIL;
4029 		}
4030 		else
4031 		{
4032 		    /* Compare two Lists for being equal or unequal. */
4033 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
4034 		    if (type == TYPE_NEQUAL)
4035 			n1 = !n1;
4036 		}
4037 	    }
4038 
4039 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
4040 	    {
4041 		if (type_is)
4042 		{
4043 		    n1 = (rettv->v_type == var2.v_type
4044 				   && rettv->vval.v_dict == var2.vval.v_dict);
4045 		    if (type == TYPE_NEQUAL)
4046 			n1 = !n1;
4047 		}
4048 		else if (rettv->v_type != var2.v_type
4049 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4050 		{
4051 		    if (rettv->v_type != var2.v_type)
4052 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4053 		    else
4054 			EMSG(_("E736: Invalid operation for Dictionary"));
4055 		    clear_tv(rettv);
4056 		    clear_tv(&var2);
4057 		    return FAIL;
4058 		}
4059 		else
4060 		{
4061 		    /* Compare two Dictionaries for being equal or unequal. */
4062 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4063 		    if (type == TYPE_NEQUAL)
4064 			n1 = !n1;
4065 		}
4066 	    }
4067 
4068 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4069 	    {
4070 		if (rettv->v_type != var2.v_type
4071 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4072 		{
4073 		    if (rettv->v_type != var2.v_type)
4074 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4075 		    else
4076 			EMSG(_("E694: Invalid operation for Funcrefs"));
4077 		    clear_tv(rettv);
4078 		    clear_tv(&var2);
4079 		    return FAIL;
4080 		}
4081 		else
4082 		{
4083 		    /* Compare two Funcrefs for being equal or unequal. */
4084 		    if (rettv->vval.v_string == NULL
4085 						|| var2.vval.v_string == NULL)
4086 			n1 = FALSE;
4087 		    else
4088 			n1 = STRCMP(rettv->vval.v_string,
4089 						     var2.vval.v_string) == 0;
4090 		    if (type == TYPE_NEQUAL)
4091 			n1 = !n1;
4092 		}
4093 	    }
4094 
4095 	    /*
4096 	     * If one of the two variables is a number, compare as a number.
4097 	     * When using "=~" or "!~", always compare as string.
4098 	     */
4099 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4100 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4101 	    {
4102 		n1 = get_tv_number(rettv);
4103 		n2 = get_tv_number(&var2);
4104 		switch (type)
4105 		{
4106 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4107 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4108 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4109 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4110 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4111 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4112 		    case TYPE_UNKNOWN:
4113 		    case TYPE_MATCH:
4114 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4115 		}
4116 	    }
4117 	    else
4118 	    {
4119 		s1 = get_tv_string_buf(rettv, buf1);
4120 		s2 = get_tv_string_buf(&var2, buf2);
4121 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4122 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4123 		else
4124 		    i = 0;
4125 		n1 = FALSE;
4126 		switch (type)
4127 		{
4128 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4129 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4130 		    case TYPE_GREATER:  n1 = (i > 0); break;
4131 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4132 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4133 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4134 
4135 		    case TYPE_MATCH:
4136 		    case TYPE_NOMATCH:
4137 			    /* avoid 'l' flag in 'cpoptions' */
4138 			    save_cpo = p_cpo;
4139 			    p_cpo = (char_u *)"";
4140 			    regmatch.regprog = vim_regcomp(s2,
4141 							RE_MAGIC + RE_STRING);
4142 			    regmatch.rm_ic = ic;
4143 			    if (regmatch.regprog != NULL)
4144 			    {
4145 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4146 				vim_free(regmatch.regprog);
4147 				if (type == TYPE_NOMATCH)
4148 				    n1 = !n1;
4149 			    }
4150 			    p_cpo = save_cpo;
4151 			    break;
4152 
4153 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4154 		}
4155 	    }
4156 	    clear_tv(rettv);
4157 	    clear_tv(&var2);
4158 	    rettv->v_type = VAR_NUMBER;
4159 	    rettv->vval.v_number = n1;
4160 	}
4161     }
4162 
4163     return OK;
4164 }
4165 
4166 /*
4167  * Handle fourth level expression:
4168  *	+	number addition
4169  *	-	number subtraction
4170  *	.	string concatenation
4171  *
4172  * "arg" must point to the first non-white of the expression.
4173  * "arg" is advanced to the next non-white after the recognized expression.
4174  *
4175  * Return OK or FAIL.
4176  */
4177     static int
4178 eval5(arg, rettv, evaluate)
4179     char_u	**arg;
4180     typval_T	*rettv;
4181     int		evaluate;
4182 {
4183     typval_T	var2;
4184     typval_T	var3;
4185     int		op;
4186     long	n1, n2;
4187     char_u	*s1, *s2;
4188     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4189     char_u	*p;
4190 
4191     /*
4192      * Get the first variable.
4193      */
4194     if (eval6(arg, rettv, evaluate) == FAIL)
4195 	return FAIL;
4196 
4197     /*
4198      * Repeat computing, until no '+', '-' or '.' is following.
4199      */
4200     for (;;)
4201     {
4202 	op = **arg;
4203 	if (op != '+' && op != '-' && op != '.')
4204 	    break;
4205 
4206 	if (op != '+' || rettv->v_type != VAR_LIST)
4207 	{
4208 	    /* For "list + ...", an illegal use of the first operand as
4209 	     * a number cannot be determined before evaluating the 2nd
4210 	     * operand: if this is also a list, all is ok.
4211 	     * For "something . ...", "something - ..." or "non-list + ...",
4212 	     * we know that the first operand needs to be a string or number
4213 	     * without evaluating the 2nd operand.  So check before to avoid
4214 	     * side effects after an error. */
4215 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4216 	    {
4217 		clear_tv(rettv);
4218 		return FAIL;
4219 	    }
4220 	}
4221 
4222 	/*
4223 	 * Get the second variable.
4224 	 */
4225 	*arg = skipwhite(*arg + 1);
4226 	if (eval6(arg, &var2, evaluate) == FAIL)
4227 	{
4228 	    clear_tv(rettv);
4229 	    return FAIL;
4230 	}
4231 
4232 	if (evaluate)
4233 	{
4234 	    /*
4235 	     * Compute the result.
4236 	     */
4237 	    if (op == '.')
4238 	    {
4239 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4240 		s2 = get_tv_string_buf_chk(&var2, buf2);
4241 		if (s2 == NULL)		/* type error ? */
4242 		{
4243 		    clear_tv(rettv);
4244 		    clear_tv(&var2);
4245 		    return FAIL;
4246 		}
4247 		p = concat_str(s1, s2);
4248 		clear_tv(rettv);
4249 		rettv->v_type = VAR_STRING;
4250 		rettv->vval.v_string = p;
4251 	    }
4252 	    else if (op == '+' && rettv->v_type == VAR_LIST
4253 						   && var2.v_type == VAR_LIST)
4254 	    {
4255 		/* concatenate Lists */
4256 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4257 							       &var3) == FAIL)
4258 		{
4259 		    clear_tv(rettv);
4260 		    clear_tv(&var2);
4261 		    return FAIL;
4262 		}
4263 		clear_tv(rettv);
4264 		*rettv = var3;
4265 	    }
4266 	    else
4267 	    {
4268 		int	    error = FALSE;
4269 
4270 		n1 = get_tv_number_chk(rettv, &error);
4271 		if (error)
4272 		{
4273 		    /* This can only happen for "list + non-list".
4274 		     * For "non-list + ..." or "something - ...", we returned
4275 		     * before evaluating the 2nd operand. */
4276 		    clear_tv(rettv);
4277 		    return FAIL;
4278 		}
4279 		n2 = get_tv_number_chk(&var2, &error);
4280 		if (error)
4281 		{
4282 		    clear_tv(rettv);
4283 		    clear_tv(&var2);
4284 		    return FAIL;
4285 		}
4286 		clear_tv(rettv);
4287 		if (op == '+')
4288 		    n1 = n1 + n2;
4289 		else
4290 		    n1 = n1 - n2;
4291 		rettv->v_type = VAR_NUMBER;
4292 		rettv->vval.v_number = n1;
4293 	    }
4294 	    clear_tv(&var2);
4295 	}
4296     }
4297     return OK;
4298 }
4299 
4300 /*
4301  * Handle fifth level expression:
4302  *	*	number multiplication
4303  *	/	number division
4304  *	%	number modulo
4305  *
4306  * "arg" must point to the first non-white of the expression.
4307  * "arg" is advanced to the next non-white after the recognized expression.
4308  *
4309  * Return OK or FAIL.
4310  */
4311     static int
4312 eval6(arg, rettv, evaluate)
4313     char_u	**arg;
4314     typval_T	*rettv;
4315     int		evaluate;
4316 {
4317     typval_T	var2;
4318     int		op;
4319     long	n1, n2;
4320     int		error = FALSE;
4321 
4322     /*
4323      * Get the first variable.
4324      */
4325     if (eval7(arg, rettv, evaluate) == FAIL)
4326 	return FAIL;
4327 
4328     /*
4329      * Repeat computing, until no '*', '/' or '%' is following.
4330      */
4331     for (;;)
4332     {
4333 	op = **arg;
4334 	if (op != '*' && op != '/' && op != '%')
4335 	    break;
4336 
4337 	if (evaluate)
4338 	{
4339 	    n1 = get_tv_number_chk(rettv, &error);
4340 	    clear_tv(rettv);
4341 	    if (error)
4342 		return FAIL;
4343 	}
4344 	else
4345 	    n1 = 0;
4346 
4347 	/*
4348 	 * Get the second variable.
4349 	 */
4350 	*arg = skipwhite(*arg + 1);
4351 	if (eval7(arg, &var2, evaluate) == FAIL)
4352 	    return FAIL;
4353 
4354 	if (evaluate)
4355 	{
4356 	    n2 = get_tv_number_chk(&var2, &error);
4357 	    clear_tv(&var2);
4358 	    if (error)
4359 		return FAIL;
4360 
4361 	    /*
4362 	     * Compute the result.
4363 	     */
4364 	    if (op == '*')
4365 		n1 = n1 * n2;
4366 	    else if (op == '/')
4367 	    {
4368 		if (n2 == 0)	/* give an error message? */
4369 		    n1 = 0x7fffffffL;
4370 		else
4371 		    n1 = n1 / n2;
4372 	    }
4373 	    else
4374 	    {
4375 		if (n2 == 0)	/* give an error message? */
4376 		    n1 = 0;
4377 		else
4378 		    n1 = n1 % n2;
4379 	    }
4380 	    rettv->v_type = VAR_NUMBER;
4381 	    rettv->vval.v_number = n1;
4382 	}
4383     }
4384 
4385     return OK;
4386 }
4387 
4388 /*
4389  * Handle sixth level expression:
4390  *  number		number constant
4391  *  "string"		string contstant
4392  *  'string'		literal string contstant
4393  *  &option-name	option value
4394  *  @r			register contents
4395  *  identifier		variable value
4396  *  function()		function call
4397  *  $VAR		environment variable
4398  *  (expression)	nested expression
4399  *  [expr, expr]	List
4400  *  {key: val, key: val}  Dictionary
4401  *
4402  *  Also handle:
4403  *  ! in front		logical NOT
4404  *  - in front		unary minus
4405  *  + in front		unary plus (ignored)
4406  *  trailing []		subscript in String or List
4407  *  trailing .name	entry in Dictionary
4408  *
4409  * "arg" must point to the first non-white of the expression.
4410  * "arg" is advanced to the next non-white after the recognized expression.
4411  *
4412  * Return OK or FAIL.
4413  */
4414     static int
4415 eval7(arg, rettv, evaluate)
4416     char_u	**arg;
4417     typval_T	*rettv;
4418     int		evaluate;
4419 {
4420     long	n;
4421     int		len;
4422     char_u	*s;
4423     int		val;
4424     char_u	*start_leader, *end_leader;
4425     int		ret = OK;
4426     char_u	*alias;
4427 
4428     /*
4429      * Initialise variable so that clear_tv() can't mistake this for a
4430      * string and free a string that isn't there.
4431      */
4432     rettv->v_type = VAR_UNKNOWN;
4433 
4434     /*
4435      * Skip '!' and '-' characters.  They are handled later.
4436      */
4437     start_leader = *arg;
4438     while (**arg == '!' || **arg == '-' || **arg == '+')
4439 	*arg = skipwhite(*arg + 1);
4440     end_leader = *arg;
4441 
4442     switch (**arg)
4443     {
4444     /*
4445      * Number constant.
4446      */
4447     case '0':
4448     case '1':
4449     case '2':
4450     case '3':
4451     case '4':
4452     case '5':
4453     case '6':
4454     case '7':
4455     case '8':
4456     case '9':
4457 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4458 		*arg += len;
4459 		if (evaluate)
4460 		{
4461 		    rettv->v_type = VAR_NUMBER;
4462 		    rettv->vval.v_number = n;
4463 		}
4464 		break;
4465 
4466     /*
4467      * String constant: "string".
4468      */
4469     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4470 		break;
4471 
4472     /*
4473      * Literal string constant: 'str''ing'.
4474      */
4475     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4476 		break;
4477 
4478     /*
4479      * List: [expr, expr]
4480      */
4481     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4482 		break;
4483 
4484     /*
4485      * Dictionary: {key: val, key: val}
4486      */
4487     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4488 		break;
4489 
4490     /*
4491      * Option value: &name
4492      */
4493     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4494 		break;
4495 
4496     /*
4497      * Environment variable: $VAR.
4498      */
4499     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4500 		break;
4501 
4502     /*
4503      * Register contents: @r.
4504      */
4505     case '@':	++*arg;
4506 		if (evaluate)
4507 		{
4508 		    rettv->v_type = VAR_STRING;
4509 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4510 		}
4511 		if (**arg != NUL)
4512 		    ++*arg;
4513 		break;
4514 
4515     /*
4516      * nested expression: (expression).
4517      */
4518     case '(':	*arg = skipwhite(*arg + 1);
4519 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4520 		if (**arg == ')')
4521 		    ++*arg;
4522 		else if (ret == OK)
4523 		{
4524 		    EMSG(_("E110: Missing ')'"));
4525 		    clear_tv(rettv);
4526 		    ret = FAIL;
4527 		}
4528 		break;
4529 
4530     default:	ret = NOTDONE;
4531 		break;
4532     }
4533 
4534     if (ret == NOTDONE)
4535     {
4536 	/*
4537 	 * Must be a variable or function name.
4538 	 * Can also be a curly-braces kind of name: {expr}.
4539 	 */
4540 	s = *arg;
4541 	len = get_name_len(arg, &alias, evaluate, TRUE);
4542 	if (alias != NULL)
4543 	    s = alias;
4544 
4545 	if (len <= 0)
4546 	    ret = FAIL;
4547 	else
4548 	{
4549 	    if (**arg == '(')		/* recursive! */
4550 	    {
4551 		/* If "s" is the name of a variable of type VAR_FUNC
4552 		 * use its contents. */
4553 		s = deref_func_name(s, &len);
4554 
4555 		/* Invoke the function. */
4556 		ret = get_func_tv(s, len, rettv, arg,
4557 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4558 			  &len, evaluate, NULL);
4559 		/* Stop the expression evaluation when immediately
4560 		 * aborting on error, or when an interrupt occurred or
4561 		 * an exception was thrown but not caught. */
4562 		if (aborting())
4563 		{
4564 		    if (ret == OK)
4565 			clear_tv(rettv);
4566 		    ret = FAIL;
4567 		}
4568 	    }
4569 	    else if (evaluate)
4570 		ret = get_var_tv(s, len, rettv, TRUE);
4571 	    else
4572 		ret = OK;
4573 	}
4574 
4575 	if (alias != NULL)
4576 	    vim_free(alias);
4577     }
4578 
4579     *arg = skipwhite(*arg);
4580 
4581     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4582      * expr(expr). */
4583     if (ret == OK)
4584 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4585 
4586     /*
4587      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4588      */
4589     if (ret == OK && evaluate && end_leader > start_leader)
4590     {
4591 	int	    error = FALSE;
4592 
4593 	val = get_tv_number_chk(rettv, &error);
4594 	if (error)
4595 	{
4596 	    clear_tv(rettv);
4597 	    ret = FAIL;
4598 	}
4599 	else
4600 	{
4601 	    while (end_leader > start_leader)
4602 	    {
4603 		--end_leader;
4604 		if (*end_leader == '!')
4605 		    val = !val;
4606 		else if (*end_leader == '-')
4607 		    val = -val;
4608 	    }
4609 	    clear_tv(rettv);
4610 	    rettv->v_type = VAR_NUMBER;
4611 	    rettv->vval.v_number = val;
4612 	}
4613     }
4614 
4615     return ret;
4616 }
4617 
4618 /*
4619  * Evaluate an "[expr]" or "[expr:expr]" index.
4620  * "*arg" points to the '['.
4621  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4622  */
4623     static int
4624 eval_index(arg, rettv, evaluate, verbose)
4625     char_u	**arg;
4626     typval_T	*rettv;
4627     int		evaluate;
4628     int		verbose;	/* give error messages */
4629 {
4630     int		empty1 = FALSE, empty2 = FALSE;
4631     typval_T	var1, var2;
4632     long	n1, n2 = 0;
4633     long	len = -1;
4634     int		range = FALSE;
4635     char_u	*s;
4636     char_u	*key = NULL;
4637 
4638     if (rettv->v_type == VAR_FUNC)
4639     {
4640 	if (verbose)
4641 	    EMSG(_("E695: Cannot index a Funcref"));
4642 	return FAIL;
4643     }
4644 
4645     if (**arg == '.')
4646     {
4647 	/*
4648 	 * dict.name
4649 	 */
4650 	key = *arg + 1;
4651 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4652 	    ;
4653 	if (len == 0)
4654 	    return FAIL;
4655 	*arg = skipwhite(key + len);
4656     }
4657     else
4658     {
4659 	/*
4660 	 * something[idx]
4661 	 *
4662 	 * Get the (first) variable from inside the [].
4663 	 */
4664 	*arg = skipwhite(*arg + 1);
4665 	if (**arg == ':')
4666 	    empty1 = TRUE;
4667 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4668 	    return FAIL;
4669 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4670 	{
4671 	    /* not a number or string */
4672 	    clear_tv(&var1);
4673 	    return FAIL;
4674 	}
4675 
4676 	/*
4677 	 * Get the second variable from inside the [:].
4678 	 */
4679 	if (**arg == ':')
4680 	{
4681 	    range = TRUE;
4682 	    *arg = skipwhite(*arg + 1);
4683 	    if (**arg == ']')
4684 		empty2 = TRUE;
4685 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4686 	    {
4687 		if (!empty1)
4688 		    clear_tv(&var1);
4689 		return FAIL;
4690 	    }
4691 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4692 	    {
4693 		/* not a number or string */
4694 		if (!empty1)
4695 		    clear_tv(&var1);
4696 		clear_tv(&var2);
4697 		return FAIL;
4698 	    }
4699 	}
4700 
4701 	/* Check for the ']'. */
4702 	if (**arg != ']')
4703 	{
4704 	    if (verbose)
4705 		EMSG(_(e_missbrac));
4706 	    clear_tv(&var1);
4707 	    if (range)
4708 		clear_tv(&var2);
4709 	    return FAIL;
4710 	}
4711 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4712     }
4713 
4714     if (evaluate)
4715     {
4716 	n1 = 0;
4717 	if (!empty1 && rettv->v_type != VAR_DICT)
4718 	{
4719 	    n1 = get_tv_number(&var1);
4720 	    clear_tv(&var1);
4721 	}
4722 	if (range)
4723 	{
4724 	    if (empty2)
4725 		n2 = -1;
4726 	    else
4727 	    {
4728 		n2 = get_tv_number(&var2);
4729 		clear_tv(&var2);
4730 	    }
4731 	}
4732 
4733 	switch (rettv->v_type)
4734 	{
4735 	    case VAR_NUMBER:
4736 	    case VAR_STRING:
4737 		s = get_tv_string(rettv);
4738 		len = (long)STRLEN(s);
4739 		if (range)
4740 		{
4741 		    /* The resulting variable is a substring.  If the indexes
4742 		     * are out of range the result is empty. */
4743 		    if (n1 < 0)
4744 		    {
4745 			n1 = len + n1;
4746 			if (n1 < 0)
4747 			    n1 = 0;
4748 		    }
4749 		    if (n2 < 0)
4750 			n2 = len + n2;
4751 		    else if (n2 >= len)
4752 			n2 = len;
4753 		    if (n1 >= len || n2 < 0 || n1 > n2)
4754 			s = NULL;
4755 		    else
4756 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4757 		}
4758 		else
4759 		{
4760 		    /* The resulting variable is a string of a single
4761 		     * character.  If the index is too big or negative the
4762 		     * result is empty. */
4763 		    if (n1 >= len || n1 < 0)
4764 			s = NULL;
4765 		    else
4766 			s = vim_strnsave(s + n1, 1);
4767 		}
4768 		clear_tv(rettv);
4769 		rettv->v_type = VAR_STRING;
4770 		rettv->vval.v_string = s;
4771 		break;
4772 
4773 	    case VAR_LIST:
4774 		len = list_len(rettv->vval.v_list);
4775 		if (n1 < 0)
4776 		    n1 = len + n1;
4777 		if (!empty1 && (n1 < 0 || n1 >= len))
4778 		{
4779 		    if (verbose)
4780 			EMSGN(_(e_listidx), n1);
4781 		    return FAIL;
4782 		}
4783 		if (range)
4784 		{
4785 		    list_T	*l;
4786 		    listitem_T	*item;
4787 
4788 		    if (n2 < 0)
4789 			n2 = len + n2;
4790 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4791 		    {
4792 			if (verbose)
4793 			    EMSGN(_(e_listidx), n2);
4794 			return FAIL;
4795 		    }
4796 		    l = list_alloc();
4797 		    if (l == NULL)
4798 			return FAIL;
4799 		    for (item = list_find(rettv->vval.v_list, n1);
4800 							       n1 <= n2; ++n1)
4801 		    {
4802 			if (list_append_tv(l, &item->li_tv) == FAIL)
4803 			{
4804 			    list_free(l);
4805 			    return FAIL;
4806 			}
4807 			item = item->li_next;
4808 		    }
4809 		    clear_tv(rettv);
4810 		    rettv->v_type = VAR_LIST;
4811 		    rettv->vval.v_list = l;
4812 		    ++l->lv_refcount;
4813 		}
4814 		else
4815 		{
4816 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4817 								       &var1);
4818 		    clear_tv(rettv);
4819 		    *rettv = var1;
4820 		}
4821 		break;
4822 
4823 	    case VAR_DICT:
4824 		if (range)
4825 		{
4826 		    if (verbose)
4827 			EMSG(_(e_dictrange));
4828 		    if (len == -1)
4829 			clear_tv(&var1);
4830 		    return FAIL;
4831 		}
4832 		{
4833 		    dictitem_T	*item;
4834 
4835 		    if (len == -1)
4836 		    {
4837 			key = get_tv_string(&var1);
4838 			if (*key == NUL)
4839 			{
4840 			    if (verbose)
4841 				EMSG(_(e_emptykey));
4842 			    clear_tv(&var1);
4843 			    return FAIL;
4844 			}
4845 		    }
4846 
4847 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4848 
4849 		    if (item == NULL && verbose)
4850 			EMSG2(_(e_dictkey), key);
4851 		    if (len == -1)
4852 			clear_tv(&var1);
4853 		    if (item == NULL)
4854 			return FAIL;
4855 
4856 		    copy_tv(&item->di_tv, &var1);
4857 		    clear_tv(rettv);
4858 		    *rettv = var1;
4859 		}
4860 		break;
4861 	}
4862     }
4863 
4864     return OK;
4865 }
4866 
4867 /*
4868  * Get an option value.
4869  * "arg" points to the '&' or '+' before the option name.
4870  * "arg" is advanced to character after the option name.
4871  * Return OK or FAIL.
4872  */
4873     static int
4874 get_option_tv(arg, rettv, evaluate)
4875     char_u	**arg;
4876     typval_T	*rettv;	/* when NULL, only check if option exists */
4877     int		evaluate;
4878 {
4879     char_u	*option_end;
4880     long	numval;
4881     char_u	*stringval;
4882     int		opt_type;
4883     int		c;
4884     int		working = (**arg == '+');    /* has("+option") */
4885     int		ret = OK;
4886     int		opt_flags;
4887 
4888     /*
4889      * Isolate the option name and find its value.
4890      */
4891     option_end = find_option_end(arg, &opt_flags);
4892     if (option_end == NULL)
4893     {
4894 	if (rettv != NULL)
4895 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4896 	return FAIL;
4897     }
4898 
4899     if (!evaluate)
4900     {
4901 	*arg = option_end;
4902 	return OK;
4903     }
4904 
4905     c = *option_end;
4906     *option_end = NUL;
4907     opt_type = get_option_value(*arg, &numval,
4908 			       rettv == NULL ? NULL : &stringval, opt_flags);
4909 
4910     if (opt_type == -3)			/* invalid name */
4911     {
4912 	if (rettv != NULL)
4913 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4914 	ret = FAIL;
4915     }
4916     else if (rettv != NULL)
4917     {
4918 	if (opt_type == -2)		/* hidden string option */
4919 	{
4920 	    rettv->v_type = VAR_STRING;
4921 	    rettv->vval.v_string = NULL;
4922 	}
4923 	else if (opt_type == -1)	/* hidden number option */
4924 	{
4925 	    rettv->v_type = VAR_NUMBER;
4926 	    rettv->vval.v_number = 0;
4927 	}
4928 	else if (opt_type == 1)		/* number option */
4929 	{
4930 	    rettv->v_type = VAR_NUMBER;
4931 	    rettv->vval.v_number = numval;
4932 	}
4933 	else				/* string option */
4934 	{
4935 	    rettv->v_type = VAR_STRING;
4936 	    rettv->vval.v_string = stringval;
4937 	}
4938     }
4939     else if (working && (opt_type == -2 || opt_type == -1))
4940 	ret = FAIL;
4941 
4942     *option_end = c;		    /* put back for error messages */
4943     *arg = option_end;
4944 
4945     return ret;
4946 }
4947 
4948 /*
4949  * Allocate a variable for a string constant.
4950  * Return OK or FAIL.
4951  */
4952     static int
4953 get_string_tv(arg, rettv, evaluate)
4954     char_u	**arg;
4955     typval_T	*rettv;
4956     int		evaluate;
4957 {
4958     char_u	*p;
4959     char_u	*name;
4960     int		extra = 0;
4961 
4962     /*
4963      * Find the end of the string, skipping backslashed characters.
4964      */
4965     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4966     {
4967 	if (*p == '\\' && p[1] != NUL)
4968 	{
4969 	    ++p;
4970 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4971 	     * to 6 characters: reserve space for 2 extra */
4972 	    if (*p == '<')
4973 		extra += 2;
4974 	}
4975     }
4976 
4977     if (*p != '"')
4978     {
4979 	EMSG2(_("E114: Missing quote: %s"), *arg);
4980 	return FAIL;
4981     }
4982 
4983     /* If only parsing, set *arg and return here */
4984     if (!evaluate)
4985     {
4986 	*arg = p + 1;
4987 	return OK;
4988     }
4989 
4990     /*
4991      * Copy the string into allocated memory, handling backslashed
4992      * characters.
4993      */
4994     name = alloc((unsigned)(p - *arg + extra));
4995     if (name == NULL)
4996 	return FAIL;
4997     rettv->v_type = VAR_STRING;
4998     rettv->vval.v_string = name;
4999 
5000     for (p = *arg + 1; *p != NUL && *p != '"'; )
5001     {
5002 	if (*p == '\\')
5003 	{
5004 	    switch (*++p)
5005 	    {
5006 		case 'b': *name++ = BS; ++p; break;
5007 		case 'e': *name++ = ESC; ++p; break;
5008 		case 'f': *name++ = FF; ++p; break;
5009 		case 'n': *name++ = NL; ++p; break;
5010 		case 'r': *name++ = CAR; ++p; break;
5011 		case 't': *name++ = TAB; ++p; break;
5012 
5013 		case 'X': /* hex: "\x1", "\x12" */
5014 		case 'x':
5015 		case 'u': /* Unicode: "\u0023" */
5016 		case 'U':
5017 			  if (vim_isxdigit(p[1]))
5018 			  {
5019 			      int	n, nr;
5020 			      int	c = toupper(*p);
5021 
5022 			      if (c == 'X')
5023 				  n = 2;
5024 			      else
5025 				  n = 4;
5026 			      nr = 0;
5027 			      while (--n >= 0 && vim_isxdigit(p[1]))
5028 			      {
5029 				  ++p;
5030 				  nr = (nr << 4) + hex2nr(*p);
5031 			      }
5032 			      ++p;
5033 #ifdef FEAT_MBYTE
5034 			      /* For "\u" store the number according to
5035 			       * 'encoding'. */
5036 			      if (c != 'X')
5037 				  name += (*mb_char2bytes)(nr, name);
5038 			      else
5039 #endif
5040 				  *name++ = nr;
5041 			  }
5042 			  break;
5043 
5044 			  /* octal: "\1", "\12", "\123" */
5045 		case '0':
5046 		case '1':
5047 		case '2':
5048 		case '3':
5049 		case '4':
5050 		case '5':
5051 		case '6':
5052 		case '7': *name = *p++ - '0';
5053 			  if (*p >= '0' && *p <= '7')
5054 			  {
5055 			      *name = (*name << 3) + *p++ - '0';
5056 			      if (*p >= '0' && *p <= '7')
5057 				  *name = (*name << 3) + *p++ - '0';
5058 			  }
5059 			  ++name;
5060 			  break;
5061 
5062 			    /* Special key, e.g.: "\<C-W>" */
5063 		case '<': extra = trans_special(&p, name, TRUE);
5064 			  if (extra != 0)
5065 			  {
5066 			      name += extra;
5067 			      break;
5068 			  }
5069 			  /* FALLTHROUGH */
5070 
5071 		default:  MB_COPY_CHAR(p, name);
5072 			  break;
5073 	    }
5074 	}
5075 	else
5076 	    MB_COPY_CHAR(p, name);
5077 
5078     }
5079     *name = NUL;
5080     *arg = p + 1;
5081 
5082     return OK;
5083 }
5084 
5085 /*
5086  * Allocate a variable for a 'str''ing' constant.
5087  * Return OK or FAIL.
5088  */
5089     static int
5090 get_lit_string_tv(arg, rettv, evaluate)
5091     char_u	**arg;
5092     typval_T	*rettv;
5093     int		evaluate;
5094 {
5095     char_u	*p;
5096     char_u	*str;
5097     int		reduce = 0;
5098 
5099     /*
5100      * Find the end of the string, skipping ''.
5101      */
5102     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5103     {
5104 	if (*p == '\'')
5105 	{
5106 	    if (p[1] != '\'')
5107 		break;
5108 	    ++reduce;
5109 	    ++p;
5110 	}
5111     }
5112 
5113     if (*p != '\'')
5114     {
5115 	EMSG2(_("E115: Missing quote: %s"), *arg);
5116 	return FAIL;
5117     }
5118 
5119     /* If only parsing return after setting "*arg" */
5120     if (!evaluate)
5121     {
5122 	*arg = p + 1;
5123 	return OK;
5124     }
5125 
5126     /*
5127      * Copy the string into allocated memory, handling '' to ' reduction.
5128      */
5129     str = alloc((unsigned)((p - *arg) - reduce));
5130     if (str == NULL)
5131 	return FAIL;
5132     rettv->v_type = VAR_STRING;
5133     rettv->vval.v_string = str;
5134 
5135     for (p = *arg + 1; *p != NUL; )
5136     {
5137 	if (*p == '\'')
5138 	{
5139 	    if (p[1] != '\'')
5140 		break;
5141 	    ++p;
5142 	}
5143 	MB_COPY_CHAR(p, str);
5144     }
5145     *str = NUL;
5146     *arg = p + 1;
5147 
5148     return OK;
5149 }
5150 
5151 /*
5152  * Allocate a variable for a List and fill it from "*arg".
5153  * Return OK or FAIL.
5154  */
5155     static int
5156 get_list_tv(arg, rettv, evaluate)
5157     char_u	**arg;
5158     typval_T	*rettv;
5159     int		evaluate;
5160 {
5161     list_T	*l = NULL;
5162     typval_T	tv;
5163     listitem_T	*item;
5164 
5165     if (evaluate)
5166     {
5167 	l = list_alloc();
5168 	if (l == NULL)
5169 	    return FAIL;
5170     }
5171 
5172     *arg = skipwhite(*arg + 1);
5173     while (**arg != ']' && **arg != NUL)
5174     {
5175 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5176 	    goto failret;
5177 	if (evaluate)
5178 	{
5179 	    item = listitem_alloc();
5180 	    if (item != NULL)
5181 	    {
5182 		item->li_tv = tv;
5183 		item->li_tv.v_lock = 0;
5184 		list_append(l, item);
5185 	    }
5186 	    else
5187 		clear_tv(&tv);
5188 	}
5189 
5190 	if (**arg == ']')
5191 	    break;
5192 	if (**arg != ',')
5193 	{
5194 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5195 	    goto failret;
5196 	}
5197 	*arg = skipwhite(*arg + 1);
5198     }
5199 
5200     if (**arg != ']')
5201     {
5202 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5203 failret:
5204 	if (evaluate)
5205 	    list_free(l);
5206 	return FAIL;
5207     }
5208 
5209     *arg = skipwhite(*arg + 1);
5210     if (evaluate)
5211     {
5212 	rettv->v_type = VAR_LIST;
5213 	rettv->vval.v_list = l;
5214 	++l->lv_refcount;
5215     }
5216 
5217     return OK;
5218 }
5219 
5220 /*
5221  * Allocate an empty header for a list.
5222  * Caller should take care of the reference count.
5223  */
5224     list_T *
5225 list_alloc()
5226 {
5227     list_T  *l;
5228 
5229     l = (list_T *)alloc_clear(sizeof(list_T));
5230     if (l != NULL)
5231     {
5232 	/* Prepend the list to the list of lists for garbage collection. */
5233 	if (first_list != NULL)
5234 	    first_list->lv_used_prev = l;
5235 	l->lv_used_prev = NULL;
5236 	l->lv_used_next = first_list;
5237 	first_list = l;
5238     }
5239     return l;
5240 }
5241 
5242 /*
5243  * Allocate an empty list for a return value.
5244  * Returns OK or FAIL.
5245  */
5246     static int
5247 rettv_list_alloc(rettv)
5248     typval_T	*rettv;
5249 {
5250     list_T	*l = list_alloc();
5251 
5252     if (l == NULL)
5253 	return FAIL;
5254 
5255     rettv->vval.v_list = l;
5256     rettv->v_type = VAR_LIST;
5257     ++l->lv_refcount;
5258     return OK;
5259 }
5260 
5261 /*
5262  * Unreference a list: decrement the reference count and free it when it
5263  * becomes zero.
5264  */
5265     void
5266 list_unref(l)
5267     list_T *l;
5268 {
5269     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5270 	list_free(l);
5271 }
5272 
5273 /*
5274  * Free a list, including all items it points to.
5275  * Ignores the reference count.
5276  */
5277     void
5278 list_free(l)
5279     list_T *l;
5280 {
5281     listitem_T *item;
5282 
5283     /* Avoid that recursive reference to the list frees us again. */
5284     l->lv_refcount = DEL_REFCOUNT;
5285 
5286     /* Remove the list from the list of lists for garbage collection. */
5287     if (l->lv_used_prev == NULL)
5288 	first_list = l->lv_used_next;
5289     else
5290 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5291     if (l->lv_used_next != NULL)
5292 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5293 
5294     for (item = l->lv_first; item != NULL; item = l->lv_first)
5295     {
5296 	/* Remove the item before deleting it. */
5297 	l->lv_first = item->li_next;
5298 	listitem_free(item);
5299     }
5300     vim_free(l);
5301 }
5302 
5303 /*
5304  * Allocate a list item.
5305  */
5306     static listitem_T *
5307 listitem_alloc()
5308 {
5309     return (listitem_T *)alloc(sizeof(listitem_T));
5310 }
5311 
5312 /*
5313  * Free a list item.  Also clears the value.  Does not notify watchers.
5314  */
5315     static void
5316 listitem_free(item)
5317     listitem_T *item;
5318 {
5319     clear_tv(&item->li_tv);
5320     vim_free(item);
5321 }
5322 
5323 /*
5324  * Remove a list item from a List and free it.  Also clears the value.
5325  */
5326     static void
5327 listitem_remove(l, item)
5328     list_T  *l;
5329     listitem_T *item;
5330 {
5331     list_remove(l, item, item);
5332     listitem_free(item);
5333 }
5334 
5335 /*
5336  * Get the number of items in a list.
5337  */
5338     static long
5339 list_len(l)
5340     list_T	*l;
5341 {
5342     if (l == NULL)
5343 	return 0L;
5344     return l->lv_len;
5345 }
5346 
5347 /*
5348  * Return TRUE when two lists have exactly the same values.
5349  */
5350     static int
5351 list_equal(l1, l2, ic)
5352     list_T	*l1;
5353     list_T	*l2;
5354     int		ic;	/* ignore case for strings */
5355 {
5356     listitem_T	*item1, *item2;
5357 
5358     if (list_len(l1) != list_len(l2))
5359 	return FALSE;
5360 
5361     for (item1 = l1->lv_first, item2 = l2->lv_first;
5362 	    item1 != NULL && item2 != NULL;
5363 			       item1 = item1->li_next, item2 = item2->li_next)
5364 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5365 	    return FALSE;
5366     return item1 == NULL && item2 == NULL;
5367 }
5368 
5369 #if defined(FEAT_PYTHON) || defined(PROTO)
5370 /*
5371  * Return the dictitem that an entry in a hashtable points to.
5372  */
5373     dictitem_T *
5374 dict_lookup(hi)
5375     hashitem_T *hi;
5376 {
5377     return HI2DI(hi);
5378 }
5379 #endif
5380 
5381 /*
5382  * Return TRUE when two dictionaries have exactly the same key/values.
5383  */
5384     static int
5385 dict_equal(d1, d2, ic)
5386     dict_T	*d1;
5387     dict_T	*d2;
5388     int		ic;	/* ignore case for strings */
5389 {
5390     hashitem_T	*hi;
5391     dictitem_T	*item2;
5392     int		todo;
5393 
5394     if (dict_len(d1) != dict_len(d2))
5395 	return FALSE;
5396 
5397     todo = d1->dv_hashtab.ht_used;
5398     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5399     {
5400 	if (!HASHITEM_EMPTY(hi))
5401 	{
5402 	    item2 = dict_find(d2, hi->hi_key, -1);
5403 	    if (item2 == NULL)
5404 		return FALSE;
5405 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5406 		return FALSE;
5407 	    --todo;
5408 	}
5409     }
5410     return TRUE;
5411 }
5412 
5413 /*
5414  * Return TRUE if "tv1" and "tv2" have the same value.
5415  * Compares the items just like "==" would compare them, but strings and
5416  * numbers are different.
5417  */
5418     static int
5419 tv_equal(tv1, tv2, ic)
5420     typval_T *tv1;
5421     typval_T *tv2;
5422     int	    ic;	    /* ignore case */
5423 {
5424     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5425     char_u	*s1, *s2;
5426 
5427     if (tv1->v_type != tv2->v_type)
5428 	return FALSE;
5429 
5430     switch (tv1->v_type)
5431     {
5432 	case VAR_LIST:
5433 	    /* recursive! */
5434 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5435 
5436 	case VAR_DICT:
5437 	    /* recursive! */
5438 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5439 
5440 	case VAR_FUNC:
5441 	    return (tv1->vval.v_string != NULL
5442 		    && tv2->vval.v_string != NULL
5443 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5444 
5445 	case VAR_NUMBER:
5446 	    return tv1->vval.v_number == tv2->vval.v_number;
5447 
5448 	case VAR_STRING:
5449 	    s1 = get_tv_string_buf(tv1, buf1);
5450 	    s2 = get_tv_string_buf(tv2, buf2);
5451 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5452     }
5453 
5454     EMSG2(_(e_intern2), "tv_equal()");
5455     return TRUE;
5456 }
5457 
5458 /*
5459  * Locate item with index "n" in list "l" and return it.
5460  * A negative index is counted from the end; -1 is the last item.
5461  * Returns NULL when "n" is out of range.
5462  */
5463     static listitem_T *
5464 list_find(l, n)
5465     list_T	*l;
5466     long	n;
5467 {
5468     listitem_T	*item;
5469     long	idx;
5470 
5471     if (l == NULL)
5472 	return NULL;
5473 
5474     /* Negative index is relative to the end. */
5475     if (n < 0)
5476 	n = l->lv_len + n;
5477 
5478     /* Check for index out of range. */
5479     if (n < 0 || n >= l->lv_len)
5480 	return NULL;
5481 
5482     /* When there is a cached index may start search from there. */
5483     if (l->lv_idx_item != NULL)
5484     {
5485 	if (n < l->lv_idx / 2)
5486 	{
5487 	    /* closest to the start of the list */
5488 	    item = l->lv_first;
5489 	    idx = 0;
5490 	}
5491 	else if (n > (l->lv_idx + l->lv_len) / 2)
5492 	{
5493 	    /* closest to the end of the list */
5494 	    item = l->lv_last;
5495 	    idx = l->lv_len - 1;
5496 	}
5497 	else
5498 	{
5499 	    /* closest to the cached index */
5500 	    item = l->lv_idx_item;
5501 	    idx = l->lv_idx;
5502 	}
5503     }
5504     else
5505     {
5506 	if (n < l->lv_len / 2)
5507 	{
5508 	    /* closest to the start of the list */
5509 	    item = l->lv_first;
5510 	    idx = 0;
5511 	}
5512 	else
5513 	{
5514 	    /* closest to the end of the list */
5515 	    item = l->lv_last;
5516 	    idx = l->lv_len - 1;
5517 	}
5518     }
5519 
5520     while (n > idx)
5521     {
5522 	/* search forward */
5523 	item = item->li_next;
5524 	++idx;
5525     }
5526     while (n < idx)
5527     {
5528 	/* search backward */
5529 	item = item->li_prev;
5530 	--idx;
5531     }
5532 
5533     /* cache the used index */
5534     l->lv_idx = idx;
5535     l->lv_idx_item = item;
5536 
5537     return item;
5538 }
5539 
5540 /*
5541  * Get list item "l[idx]" as a number.
5542  */
5543     static long
5544 list_find_nr(l, idx, errorp)
5545     list_T	*l;
5546     long	idx;
5547     int		*errorp;	/* set to TRUE when something wrong */
5548 {
5549     listitem_T	*li;
5550 
5551     li = list_find(l, idx);
5552     if (li == NULL)
5553     {
5554 	if (errorp != NULL)
5555 	    *errorp = TRUE;
5556 	return -1L;
5557     }
5558     return get_tv_number_chk(&li->li_tv, errorp);
5559 }
5560 
5561 /*
5562  * Locate "item" list "l" and return its index.
5563  * Returns -1 when "item" is not in the list.
5564  */
5565     static long
5566 list_idx_of_item(l, item)
5567     list_T	*l;
5568     listitem_T	*item;
5569 {
5570     long	idx = 0;
5571     listitem_T	*li;
5572 
5573     if (l == NULL)
5574 	return -1;
5575     idx = 0;
5576     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5577 	++idx;
5578     if (li == NULL)
5579 	return -1;
5580     return idx;
5581 }
5582 
5583 /*
5584  * Append item "item" to the end of list "l".
5585  */
5586     static void
5587 list_append(l, item)
5588     list_T	*l;
5589     listitem_T	*item;
5590 {
5591     if (l->lv_last == NULL)
5592     {
5593 	/* empty list */
5594 	l->lv_first = item;
5595 	l->lv_last = item;
5596 	item->li_prev = NULL;
5597     }
5598     else
5599     {
5600 	l->lv_last->li_next = item;
5601 	item->li_prev = l->lv_last;
5602 	l->lv_last = item;
5603     }
5604     ++l->lv_len;
5605     item->li_next = NULL;
5606 }
5607 
5608 /*
5609  * Append typval_T "tv" to the end of list "l".
5610  * Return FAIL when out of memory.
5611  */
5612     static int
5613 list_append_tv(l, tv)
5614     list_T	*l;
5615     typval_T	*tv;
5616 {
5617     listitem_T	*li = listitem_alloc();
5618 
5619     if (li == NULL)
5620 	return FAIL;
5621     copy_tv(tv, &li->li_tv);
5622     list_append(l, li);
5623     return OK;
5624 }
5625 
5626 /*
5627  * Add a dictionary to a list.  Used by getqflist().
5628  * Return FAIL when out of memory.
5629  */
5630     int
5631 list_append_dict(list, dict)
5632     list_T	*list;
5633     dict_T	*dict;
5634 {
5635     listitem_T	*li = listitem_alloc();
5636 
5637     if (li == NULL)
5638 	return FAIL;
5639     li->li_tv.v_type = VAR_DICT;
5640     li->li_tv.v_lock = 0;
5641     li->li_tv.vval.v_dict = dict;
5642     list_append(list, li);
5643     ++dict->dv_refcount;
5644     return OK;
5645 }
5646 
5647 /*
5648  * Make a copy of "str" and append it as an item to list "l".
5649  * When "len" >= 0 use "str[len]".
5650  * Returns FAIL when out of memory.
5651  */
5652     static int
5653 list_append_string(l, str, len)
5654     list_T	*l;
5655     char_u	*str;
5656     int		len;
5657 {
5658     listitem_T *li = listitem_alloc();
5659 
5660     if (li == NULL)
5661 	return FAIL;
5662     list_append(l, li);
5663     li->li_tv.v_type = VAR_STRING;
5664     li->li_tv.v_lock = 0;
5665     if ((li->li_tv.vval.v_string = (len >= 0 ? vim_strnsave(str, len)
5666 						 : vim_strsave(str))) == NULL)
5667 	return FAIL;
5668     return OK;
5669 }
5670 
5671 /*
5672  * Append "n" to list "l".
5673  * Returns FAIL when out of memory.
5674  */
5675     static int
5676 list_append_number(l, n)
5677     list_T	*l;
5678     varnumber_T	n;
5679 {
5680     listitem_T	*li;
5681 
5682     li = listitem_alloc();
5683     if (li == NULL)
5684 	return FAIL;
5685     li->li_tv.v_type = VAR_NUMBER;
5686     li->li_tv.v_lock = 0;
5687     li->li_tv.vval.v_number = n;
5688     list_append(l, li);
5689     return OK;
5690 }
5691 
5692 /*
5693  * Insert typval_T "tv" in list "l" before "item".
5694  * If "item" is NULL append at the end.
5695  * Return FAIL when out of memory.
5696  */
5697     static int
5698 list_insert_tv(l, tv, item)
5699     list_T	*l;
5700     typval_T	*tv;
5701     listitem_T	*item;
5702 {
5703     listitem_T	*ni = listitem_alloc();
5704 
5705     if (ni == NULL)
5706 	return FAIL;
5707     copy_tv(tv, &ni->li_tv);
5708     if (item == NULL)
5709 	/* Append new item at end of list. */
5710 	list_append(l, ni);
5711     else
5712     {
5713 	/* Insert new item before existing item. */
5714 	ni->li_prev = item->li_prev;
5715 	ni->li_next = item;
5716 	if (item->li_prev == NULL)
5717 	{
5718 	    l->lv_first = ni;
5719 	    ++l->lv_idx;
5720 	}
5721 	else
5722 	{
5723 	    item->li_prev->li_next = ni;
5724 	    l->lv_idx_item = NULL;
5725 	}
5726 	item->li_prev = ni;
5727 	++l->lv_len;
5728     }
5729     return OK;
5730 }
5731 
5732 /*
5733  * Extend "l1" with "l2".
5734  * If "bef" is NULL append at the end, otherwise insert before this item.
5735  * Returns FAIL when out of memory.
5736  */
5737     static int
5738 list_extend(l1, l2, bef)
5739     list_T	*l1;
5740     list_T	*l2;
5741     listitem_T	*bef;
5742 {
5743     listitem_T	*item;
5744 
5745     for (item = l2->lv_first; item != NULL; item = item->li_next)
5746 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5747 	    return FAIL;
5748     return OK;
5749 }
5750 
5751 /*
5752  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5753  * Return FAIL when out of memory.
5754  */
5755     static int
5756 list_concat(l1, l2, tv)
5757     list_T	*l1;
5758     list_T	*l2;
5759     typval_T	*tv;
5760 {
5761     list_T	*l;
5762 
5763     /* make a copy of the first list. */
5764     l = list_copy(l1, FALSE, 0);
5765     if (l == NULL)
5766 	return FAIL;
5767     tv->v_type = VAR_LIST;
5768     tv->vval.v_list = l;
5769 
5770     /* append all items from the second list */
5771     return list_extend(l, l2, NULL);
5772 }
5773 
5774 /*
5775  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5776  * The refcount of the new list is set to 1.
5777  * See item_copy() for "copyID".
5778  * Returns NULL when out of memory.
5779  */
5780     static list_T *
5781 list_copy(orig, deep, copyID)
5782     list_T	*orig;
5783     int		deep;
5784     int		copyID;
5785 {
5786     list_T	*copy;
5787     listitem_T	*item;
5788     listitem_T	*ni;
5789 
5790     if (orig == NULL)
5791 	return NULL;
5792 
5793     copy = list_alloc();
5794     if (copy != NULL)
5795     {
5796 	if (copyID != 0)
5797 	{
5798 	    /* Do this before adding the items, because one of the items may
5799 	     * refer back to this list. */
5800 	    orig->lv_copyID = copyID;
5801 	    orig->lv_copylist = copy;
5802 	}
5803 	for (item = orig->lv_first; item != NULL && !got_int;
5804 							 item = item->li_next)
5805 	{
5806 	    ni = listitem_alloc();
5807 	    if (ni == NULL)
5808 		break;
5809 	    if (deep)
5810 	    {
5811 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5812 		{
5813 		    vim_free(ni);
5814 		    break;
5815 		}
5816 	    }
5817 	    else
5818 		copy_tv(&item->li_tv, &ni->li_tv);
5819 	    list_append(copy, ni);
5820 	}
5821 	++copy->lv_refcount;
5822 	if (item != NULL)
5823 	{
5824 	    list_unref(copy);
5825 	    copy = NULL;
5826 	}
5827     }
5828 
5829     return copy;
5830 }
5831 
5832 /*
5833  * Remove items "item" to "item2" from list "l".
5834  * Does not free the listitem or the value!
5835  */
5836     static void
5837 list_remove(l, item, item2)
5838     list_T	*l;
5839     listitem_T	*item;
5840     listitem_T	*item2;
5841 {
5842     listitem_T	*ip;
5843 
5844     /* notify watchers */
5845     for (ip = item; ip != NULL; ip = ip->li_next)
5846     {
5847 	--l->lv_len;
5848 	list_fix_watch(l, ip);
5849 	if (ip == item2)
5850 	    break;
5851     }
5852 
5853     if (item2->li_next == NULL)
5854 	l->lv_last = item->li_prev;
5855     else
5856 	item2->li_next->li_prev = item->li_prev;
5857     if (item->li_prev == NULL)
5858 	l->lv_first = item2->li_next;
5859     else
5860 	item->li_prev->li_next = item2->li_next;
5861     l->lv_idx_item = NULL;
5862 }
5863 
5864 /*
5865  * Return an allocated string with the string representation of a list.
5866  * May return NULL.
5867  */
5868     static char_u *
5869 list2string(tv, copyID)
5870     typval_T	*tv;
5871     int		copyID;
5872 {
5873     garray_T	ga;
5874 
5875     if (tv->vval.v_list == NULL)
5876 	return NULL;
5877     ga_init2(&ga, (int)sizeof(char), 80);
5878     ga_append(&ga, '[');
5879     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE, copyID) == FAIL)
5880     {
5881 	vim_free(ga.ga_data);
5882 	return NULL;
5883     }
5884     ga_append(&ga, ']');
5885     ga_append(&ga, NUL);
5886     return (char_u *)ga.ga_data;
5887 }
5888 
5889 /*
5890  * Join list "l" into a string in "*gap", using separator "sep".
5891  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5892  * Return FAIL or OK.
5893  */
5894     static int
5895 list_join(gap, l, sep, echo, copyID)
5896     garray_T	*gap;
5897     list_T	*l;
5898     char_u	*sep;
5899     int		echo;
5900     int		copyID;
5901 {
5902     int		first = TRUE;
5903     char_u	*tofree;
5904     char_u	numbuf[NUMBUFLEN];
5905     listitem_T	*item;
5906     char_u	*s;
5907 
5908     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5909     {
5910 	if (first)
5911 	    first = FALSE;
5912 	else
5913 	    ga_concat(gap, sep);
5914 
5915 	if (echo)
5916 	    s = echo_string(&item->li_tv, &tofree, numbuf, copyID);
5917 	else
5918 	    s = tv2string(&item->li_tv, &tofree, numbuf, copyID);
5919 	if (s != NULL)
5920 	    ga_concat(gap, s);
5921 	vim_free(tofree);
5922 	if (s == NULL)
5923 	    return FAIL;
5924     }
5925     return OK;
5926 }
5927 
5928 /*
5929  * Garbage collection for lists and dictionaries.
5930  *
5931  * We use reference counts to be able to free most items right away when they
5932  * are no longer used.  But for composite items it's possible that it becomes
5933  * unused while the reference count is > 0: When there is a recursive
5934  * reference.  Example:
5935  *	:let l = [1, 2, 3]
5936  *	:let d = {9: l}
5937  *	:let l[1] = d
5938  *
5939  * Since this is quite unusual we handle this with garbage collection: every
5940  * once in a while find out which lists and dicts are not referenced from any
5941  * variable.
5942  *
5943  * Here is a good reference text about garbage collection (refers to Python
5944  * but it applies to all reference-counting mechanisms):
5945  *	http://python.ca/nas/python/gc/
5946  */
5947 
5948 /*
5949  * Do garbage collection for lists and dicts.
5950  * Return TRUE if some memory was freed.
5951  */
5952     int
5953 garbage_collect()
5954 {
5955     dict_T	*dd;
5956     list_T	*ll;
5957     int		copyID = ++current_copyID;
5958     buf_T	*buf;
5959     win_T	*wp;
5960     int		i;
5961     funccall_T	*fc;
5962     int		did_free = FALSE;
5963 
5964     /*
5965      * 1. Go through all accessible variables and mark all lists and dicts
5966      *    with copyID.
5967      */
5968     /* script-local variables */
5969     for (i = 1; i <= ga_scripts.ga_len; ++i)
5970 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5971 
5972     /* buffer-local variables */
5973     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5974 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5975 
5976     /* window-local variables */
5977     FOR_ALL_WINDOWS(wp)
5978 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5979 
5980     /* global variables */
5981     set_ref_in_ht(&globvarht, copyID);
5982 
5983     /* function-local variables */
5984     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5985     {
5986 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5987 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5988     }
5989 
5990     /*
5991      * 2. Go through the list of dicts and free items without the copyID.
5992      */
5993     for (dd = first_dict; dd != NULL; )
5994 	if (dd->dv_copyID != copyID)
5995 	{
5996 	    dict_free(dd);
5997 	    did_free = TRUE;
5998 
5999 	    /* restart, next dict may also have been freed */
6000 	    dd = first_dict;
6001 	}
6002 	else
6003 	    dd = dd->dv_used_next;
6004 
6005     /*
6006      * 3. Go through the list of lists and free items without the copyID.
6007      *    But don't free a list that has a watcher (used in a for loop), these
6008      *    are not referenced anywhere.
6009      */
6010     for (ll = first_list; ll != NULL; )
6011 	if (ll->lv_copyID != copyID && ll->lv_watch == NULL)
6012 	{
6013 	    list_free(ll);
6014 	    did_free = TRUE;
6015 
6016 	    /* restart, next list may also have been freed */
6017 	    ll = first_list;
6018 	}
6019 	else
6020 	    ll = ll->lv_used_next;
6021 
6022     return did_free;
6023 }
6024 
6025 /*
6026  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
6027  */
6028     static void
6029 set_ref_in_ht(ht, copyID)
6030     hashtab_T	*ht;
6031     int		copyID;
6032 {
6033     int		todo;
6034     hashitem_T	*hi;
6035 
6036     todo = ht->ht_used;
6037     for (hi = ht->ht_array; todo > 0; ++hi)
6038 	if (!HASHITEM_EMPTY(hi))
6039 	{
6040 	    --todo;
6041 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
6042 	}
6043 }
6044 
6045 /*
6046  * Mark all lists and dicts referenced through list "l" with "copyID".
6047  */
6048     static void
6049 set_ref_in_list(l, copyID)
6050     list_T	*l;
6051     int		copyID;
6052 {
6053     listitem_T *li;
6054 
6055     for (li = l->lv_first; li != NULL; li = li->li_next)
6056 	set_ref_in_item(&li->li_tv, copyID);
6057 }
6058 
6059 /*
6060  * Mark all lists and dicts referenced through typval "tv" with "copyID".
6061  */
6062     static void
6063 set_ref_in_item(tv, copyID)
6064     typval_T	*tv;
6065     int		copyID;
6066 {
6067     dict_T	*dd;
6068     list_T	*ll;
6069 
6070     switch (tv->v_type)
6071     {
6072 	case VAR_DICT:
6073 	    dd = tv->vval.v_dict;
6074 	    if (dd->dv_copyID != copyID)
6075 	    {
6076 		/* Didn't see this dict yet. */
6077 		dd->dv_copyID = copyID;
6078 		set_ref_in_ht(&dd->dv_hashtab, copyID);
6079 	    }
6080 	    break;
6081 
6082 	case VAR_LIST:
6083 	    ll = tv->vval.v_list;
6084 	    if (ll->lv_copyID != copyID)
6085 	    {
6086 		/* Didn't see this list yet. */
6087 		ll->lv_copyID = copyID;
6088 		set_ref_in_list(ll, copyID);
6089 	    }
6090 	    break;
6091     }
6092     return;
6093 }
6094 
6095 /*
6096  * Allocate an empty header for a dictionary.
6097  */
6098     dict_T *
6099 dict_alloc()
6100 {
6101     dict_T *d;
6102 
6103     d = (dict_T *)alloc(sizeof(dict_T));
6104     if (d != NULL)
6105     {
6106 	/* Add the list to the hashtable for garbage collection. */
6107 	if (first_dict != NULL)
6108 	    first_dict->dv_used_prev = d;
6109 	d->dv_used_next = first_dict;
6110 	d->dv_used_prev = NULL;
6111 
6112 	hash_init(&d->dv_hashtab);
6113 	d->dv_lock = 0;
6114 	d->dv_refcount = 0;
6115 	d->dv_copyID = 0;
6116     }
6117     return d;
6118 }
6119 
6120 /*
6121  * Unreference a Dictionary: decrement the reference count and free it when it
6122  * becomes zero.
6123  */
6124     static void
6125 dict_unref(d)
6126     dict_T *d;
6127 {
6128     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
6129 	dict_free(d);
6130 }
6131 
6132 /*
6133  * Free a Dictionary, including all items it contains.
6134  * Ignores the reference count.
6135  */
6136     static void
6137 dict_free(d)
6138     dict_T *d;
6139 {
6140     int		todo;
6141     hashitem_T	*hi;
6142     dictitem_T	*di;
6143 
6144     /* Avoid that recursive reference to the dict frees us again. */
6145     d->dv_refcount = DEL_REFCOUNT;
6146 
6147     /* Remove the dict from the list of dicts for garbage collection. */
6148     if (d->dv_used_prev == NULL)
6149 	first_dict = d->dv_used_next;
6150     else
6151 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6152     if (d->dv_used_next != NULL)
6153 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6154 
6155     /* Lock the hashtab, we don't want it to resize while freeing items. */
6156     hash_lock(&d->dv_hashtab);
6157     todo = d->dv_hashtab.ht_used;
6158     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6159     {
6160 	if (!HASHITEM_EMPTY(hi))
6161 	{
6162 	    /* Remove the item before deleting it, just in case there is
6163 	     * something recursive causing trouble. */
6164 	    di = HI2DI(hi);
6165 	    hash_remove(&d->dv_hashtab, hi);
6166 	    dictitem_free(di);
6167 	    --todo;
6168 	}
6169     }
6170     hash_clear(&d->dv_hashtab);
6171     vim_free(d);
6172 }
6173 
6174 /*
6175  * Allocate a Dictionary item.
6176  * The "key" is copied to the new item.
6177  * Note that the value of the item "di_tv" still needs to be initialized!
6178  * Returns NULL when out of memory.
6179  */
6180     static dictitem_T *
6181 dictitem_alloc(key)
6182     char_u	*key;
6183 {
6184     dictitem_T *di;
6185 
6186     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6187     if (di != NULL)
6188     {
6189 	STRCPY(di->di_key, key);
6190 	di->di_flags = 0;
6191     }
6192     return di;
6193 }
6194 
6195 /*
6196  * Make a copy of a Dictionary item.
6197  */
6198     static dictitem_T *
6199 dictitem_copy(org)
6200     dictitem_T *org;
6201 {
6202     dictitem_T *di;
6203 
6204     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6205     if (di != NULL)
6206     {
6207 	STRCPY(di->di_key, org->di_key);
6208 	di->di_flags = 0;
6209 	copy_tv(&org->di_tv, &di->di_tv);
6210     }
6211     return di;
6212 }
6213 
6214 /*
6215  * Remove item "item" from Dictionary "dict" and free it.
6216  */
6217     static void
6218 dictitem_remove(dict, item)
6219     dict_T	*dict;
6220     dictitem_T	*item;
6221 {
6222     hashitem_T	*hi;
6223 
6224     hi = hash_find(&dict->dv_hashtab, item->di_key);
6225     if (HASHITEM_EMPTY(hi))
6226 	EMSG2(_(e_intern2), "dictitem_remove()");
6227     else
6228 	hash_remove(&dict->dv_hashtab, hi);
6229     dictitem_free(item);
6230 }
6231 
6232 /*
6233  * Free a dict item.  Also clears the value.
6234  */
6235     static void
6236 dictitem_free(item)
6237     dictitem_T *item;
6238 {
6239     clear_tv(&item->di_tv);
6240     vim_free(item);
6241 }
6242 
6243 /*
6244  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6245  * The refcount of the new dict is set to 1.
6246  * See item_copy() for "copyID".
6247  * Returns NULL when out of memory.
6248  */
6249     static dict_T *
6250 dict_copy(orig, deep, copyID)
6251     dict_T	*orig;
6252     int		deep;
6253     int		copyID;
6254 {
6255     dict_T	*copy;
6256     dictitem_T	*di;
6257     int		todo;
6258     hashitem_T	*hi;
6259 
6260     if (orig == NULL)
6261 	return NULL;
6262 
6263     copy = dict_alloc();
6264     if (copy != NULL)
6265     {
6266 	if (copyID != 0)
6267 	{
6268 	    orig->dv_copyID = copyID;
6269 	    orig->dv_copydict = copy;
6270 	}
6271 	todo = orig->dv_hashtab.ht_used;
6272 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6273 	{
6274 	    if (!HASHITEM_EMPTY(hi))
6275 	    {
6276 		--todo;
6277 
6278 		di = dictitem_alloc(hi->hi_key);
6279 		if (di == NULL)
6280 		    break;
6281 		if (deep)
6282 		{
6283 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6284 							      copyID) == FAIL)
6285 		    {
6286 			vim_free(di);
6287 			break;
6288 		    }
6289 		}
6290 		else
6291 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6292 		if (dict_add(copy, di) == FAIL)
6293 		{
6294 		    dictitem_free(di);
6295 		    break;
6296 		}
6297 	    }
6298 	}
6299 
6300 	++copy->dv_refcount;
6301 	if (todo > 0)
6302 	{
6303 	    dict_unref(copy);
6304 	    copy = NULL;
6305 	}
6306     }
6307 
6308     return copy;
6309 }
6310 
6311 /*
6312  * Add item "item" to Dictionary "d".
6313  * Returns FAIL when out of memory and when key already existed.
6314  */
6315     static int
6316 dict_add(d, item)
6317     dict_T	*d;
6318     dictitem_T	*item;
6319 {
6320     return hash_add(&d->dv_hashtab, item->di_key);
6321 }
6322 
6323 /*
6324  * Add a number or string entry to dictionary "d".
6325  * When "str" is NULL use number "nr", otherwise use "str".
6326  * Returns FAIL when out of memory and when key already exists.
6327  */
6328     int
6329 dict_add_nr_str(d, key, nr, str)
6330     dict_T	*d;
6331     char	*key;
6332     long	nr;
6333     char_u	*str;
6334 {
6335     dictitem_T	*item;
6336 
6337     item = dictitem_alloc((char_u *)key);
6338     if (item == NULL)
6339 	return FAIL;
6340     item->di_tv.v_lock = 0;
6341     if (str == NULL)
6342     {
6343 	item->di_tv.v_type = VAR_NUMBER;
6344 	item->di_tv.vval.v_number = nr;
6345     }
6346     else
6347     {
6348 	item->di_tv.v_type = VAR_STRING;
6349 	item->di_tv.vval.v_string = vim_strsave(str);
6350     }
6351     if (dict_add(d, item) == FAIL)
6352     {
6353 	dictitem_free(item);
6354 	return FAIL;
6355     }
6356     return OK;
6357 }
6358 
6359 /*
6360  * Get the number of items in a Dictionary.
6361  */
6362     static long
6363 dict_len(d)
6364     dict_T	*d;
6365 {
6366     if (d == NULL)
6367 	return 0L;
6368     return d->dv_hashtab.ht_used;
6369 }
6370 
6371 /*
6372  * Find item "key[len]" in Dictionary "d".
6373  * If "len" is negative use strlen(key).
6374  * Returns NULL when not found.
6375  */
6376     static dictitem_T *
6377 dict_find(d, key, len)
6378     dict_T	*d;
6379     char_u	*key;
6380     int		len;
6381 {
6382 #define AKEYLEN 200
6383     char_u	buf[AKEYLEN];
6384     char_u	*akey;
6385     char_u	*tofree = NULL;
6386     hashitem_T	*hi;
6387 
6388     if (len < 0)
6389 	akey = key;
6390     else if (len >= AKEYLEN)
6391     {
6392 	tofree = akey = vim_strnsave(key, len);
6393 	if (akey == NULL)
6394 	    return NULL;
6395     }
6396     else
6397     {
6398 	/* Avoid a malloc/free by using buf[]. */
6399 	vim_strncpy(buf, key, len);
6400 	akey = buf;
6401     }
6402 
6403     hi = hash_find(&d->dv_hashtab, akey);
6404     vim_free(tofree);
6405     if (HASHITEM_EMPTY(hi))
6406 	return NULL;
6407     return HI2DI(hi);
6408 }
6409 
6410 /*
6411  * Get a string item from a dictionary.
6412  * When "save" is TRUE allocate memory for it.
6413  * Returns NULL if the entry doesn't exist or out of memory.
6414  */
6415     char_u *
6416 get_dict_string(d, key, save)
6417     dict_T	*d;
6418     char_u	*key;
6419     int		save;
6420 {
6421     dictitem_T	*di;
6422     char_u	*s;
6423 
6424     di = dict_find(d, key, -1);
6425     if (di == NULL)
6426 	return NULL;
6427     s = get_tv_string(&di->di_tv);
6428     if (save && s != NULL)
6429 	s = vim_strsave(s);
6430     return s;
6431 }
6432 
6433 /*
6434  * Get a number item from a dictionary.
6435  * Returns 0 if the entry doesn't exist or out of memory.
6436  */
6437     long
6438 get_dict_number(d, key)
6439     dict_T	*d;
6440     char_u	*key;
6441 {
6442     dictitem_T	*di;
6443 
6444     di = dict_find(d, key, -1);
6445     if (di == NULL)
6446 	return 0;
6447     return get_tv_number(&di->di_tv);
6448 }
6449 
6450 /*
6451  * Return an allocated string with the string representation of a Dictionary.
6452  * May return NULL.
6453  */
6454     static char_u *
6455 dict2string(tv, copyID)
6456     typval_T	*tv;
6457     int		copyID;
6458 {
6459     garray_T	ga;
6460     int		first = TRUE;
6461     char_u	*tofree;
6462     char_u	numbuf[NUMBUFLEN];
6463     hashitem_T	*hi;
6464     char_u	*s;
6465     dict_T	*d;
6466     int		todo;
6467 
6468     if ((d = tv->vval.v_dict) == NULL)
6469 	return NULL;
6470     ga_init2(&ga, (int)sizeof(char), 80);
6471     ga_append(&ga, '{');
6472 
6473     todo = d->dv_hashtab.ht_used;
6474     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6475     {
6476 	if (!HASHITEM_EMPTY(hi))
6477 	{
6478 	    --todo;
6479 
6480 	    if (first)
6481 		first = FALSE;
6482 	    else
6483 		ga_concat(&ga, (char_u *)", ");
6484 
6485 	    tofree = string_quote(hi->hi_key, FALSE);
6486 	    if (tofree != NULL)
6487 	    {
6488 		ga_concat(&ga, tofree);
6489 		vim_free(tofree);
6490 	    }
6491 	    ga_concat(&ga, (char_u *)": ");
6492 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf, copyID);
6493 	    if (s != NULL)
6494 		ga_concat(&ga, s);
6495 	    vim_free(tofree);
6496 	    if (s == NULL)
6497 		break;
6498 	}
6499     }
6500     if (todo > 0)
6501     {
6502 	vim_free(ga.ga_data);
6503 	return NULL;
6504     }
6505 
6506     ga_append(&ga, '}');
6507     ga_append(&ga, NUL);
6508     return (char_u *)ga.ga_data;
6509 }
6510 
6511 /*
6512  * Allocate a variable for a Dictionary and fill it from "*arg".
6513  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6514  */
6515     static int
6516 get_dict_tv(arg, rettv, evaluate)
6517     char_u	**arg;
6518     typval_T	*rettv;
6519     int		evaluate;
6520 {
6521     dict_T	*d = NULL;
6522     typval_T	tvkey;
6523     typval_T	tv;
6524     char_u	*key;
6525     dictitem_T	*item;
6526     char_u	*start = skipwhite(*arg + 1);
6527     char_u	buf[NUMBUFLEN];
6528 
6529     /*
6530      * First check if it's not a curly-braces thing: {expr}.
6531      * Must do this without evaluating, otherwise a function may be called
6532      * twice.  Unfortunately this means we need to call eval1() twice for the
6533      * first item.
6534      * But {} is an empty Dictionary.
6535      */
6536     if (*start != '}')
6537     {
6538 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6539 	    return FAIL;
6540 	if (*start == '}')
6541 	    return NOTDONE;
6542     }
6543 
6544     if (evaluate)
6545     {
6546 	d = dict_alloc();
6547 	if (d == NULL)
6548 	    return FAIL;
6549     }
6550     tvkey.v_type = VAR_UNKNOWN;
6551     tv.v_type = VAR_UNKNOWN;
6552 
6553     *arg = skipwhite(*arg + 1);
6554     while (**arg != '}' && **arg != NUL)
6555     {
6556 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6557 	    goto failret;
6558 	if (**arg != ':')
6559 	{
6560 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6561 	    clear_tv(&tvkey);
6562 	    goto failret;
6563 	}
6564 	key = get_tv_string_buf_chk(&tvkey, buf);
6565 	if (key == NULL || *key == NUL)
6566 	{
6567 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6568 	    if (key != NULL)
6569 		EMSG(_(e_emptykey));
6570 	    clear_tv(&tvkey);
6571 	    goto failret;
6572 	}
6573 
6574 	*arg = skipwhite(*arg + 1);
6575 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6576 	{
6577 	    clear_tv(&tvkey);
6578 	    goto failret;
6579 	}
6580 	if (evaluate)
6581 	{
6582 	    item = dict_find(d, key, -1);
6583 	    if (item != NULL)
6584 	    {
6585 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6586 		clear_tv(&tvkey);
6587 		clear_tv(&tv);
6588 		goto failret;
6589 	    }
6590 	    item = dictitem_alloc(key);
6591 	    clear_tv(&tvkey);
6592 	    if (item != NULL)
6593 	    {
6594 		item->di_tv = tv;
6595 		item->di_tv.v_lock = 0;
6596 		if (dict_add(d, item) == FAIL)
6597 		    dictitem_free(item);
6598 	    }
6599 	}
6600 
6601 	if (**arg == '}')
6602 	    break;
6603 	if (**arg != ',')
6604 	{
6605 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6606 	    goto failret;
6607 	}
6608 	*arg = skipwhite(*arg + 1);
6609     }
6610 
6611     if (**arg != '}')
6612     {
6613 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6614 failret:
6615 	if (evaluate)
6616 	    dict_free(d);
6617 	return FAIL;
6618     }
6619 
6620     *arg = skipwhite(*arg + 1);
6621     if (evaluate)
6622     {
6623 	rettv->v_type = VAR_DICT;
6624 	rettv->vval.v_dict = d;
6625 	++d->dv_refcount;
6626     }
6627 
6628     return OK;
6629 }
6630 
6631 /*
6632  * Return a string with the string representation of a variable.
6633  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6634  * "numbuf" is used for a number.
6635  * Does not put quotes around strings, as ":echo" displays values.
6636  * When "copyID" is not NULL replace recursive lists and dicts with "...".
6637  * May return NULL;
6638  */
6639     static char_u *
6640 echo_string(tv, tofree, numbuf, copyID)
6641     typval_T	*tv;
6642     char_u	**tofree;
6643     char_u	*numbuf;
6644     int		copyID;
6645 {
6646     static int	recurse = 0;
6647     char_u	*r = NULL;
6648 
6649     if (recurse >= DICT_MAXNEST)
6650     {
6651 	EMSG(_("E724: variable nested too deep for displaying"));
6652 	*tofree = NULL;
6653 	return NULL;
6654     }
6655     ++recurse;
6656 
6657     switch (tv->v_type)
6658     {
6659 	case VAR_FUNC:
6660 	    *tofree = NULL;
6661 	    r = tv->vval.v_string;
6662 	    break;
6663 
6664 	case VAR_LIST:
6665 	    if (tv->vval.v_list == NULL)
6666 	    {
6667 		*tofree = NULL;
6668 		r = NULL;
6669 	    }
6670 	    else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID)
6671 	    {
6672 		*tofree = NULL;
6673 		r = (char_u *)"[...]";
6674 	    }
6675 	    else
6676 	    {
6677 		tv->vval.v_list->lv_copyID = copyID;
6678 		*tofree = list2string(tv, copyID);
6679 		r = *tofree;
6680 	    }
6681 	    break;
6682 
6683 	case VAR_DICT:
6684 	    if (tv->vval.v_dict == NULL)
6685 	    {
6686 		*tofree = NULL;
6687 		r = NULL;
6688 	    }
6689 	    else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID)
6690 	    {
6691 		*tofree = NULL;
6692 		r = (char_u *)"{...}";
6693 	    }
6694 	    else
6695 	    {
6696 		tv->vval.v_dict->dv_copyID = copyID;
6697 		*tofree = dict2string(tv, copyID);
6698 		r = *tofree;
6699 	    }
6700 	    break;
6701 
6702 	case VAR_STRING:
6703 	case VAR_NUMBER:
6704 	    *tofree = NULL;
6705 	    r = get_tv_string_buf(tv, numbuf);
6706 	    break;
6707 
6708 	default:
6709 	    EMSG2(_(e_intern2), "echo_string()");
6710 	    *tofree = NULL;
6711     }
6712 
6713     --recurse;
6714     return r;
6715 }
6716 
6717 /*
6718  * Return a string with the string representation of a variable.
6719  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6720  * "numbuf" is used for a number.
6721  * Puts quotes around strings, so that they can be parsed back by eval().
6722  * May return NULL;
6723  */
6724     static char_u *
6725 tv2string(tv, tofree, numbuf, copyID)
6726     typval_T	*tv;
6727     char_u	**tofree;
6728     char_u	*numbuf;
6729     int		copyID;
6730 {
6731     switch (tv->v_type)
6732     {
6733 	case VAR_FUNC:
6734 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6735 	    return *tofree;
6736 	case VAR_STRING:
6737 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6738 	    return *tofree;
6739 	case VAR_NUMBER:
6740 	case VAR_LIST:
6741 	case VAR_DICT:
6742 	    break;
6743 	default:
6744 	    EMSG2(_(e_intern2), "tv2string()");
6745     }
6746     return echo_string(tv, tofree, numbuf, copyID);
6747 }
6748 
6749 /*
6750  * Return string "str" in ' quotes, doubling ' characters.
6751  * If "str" is NULL an empty string is assumed.
6752  * If "function" is TRUE make it function('string').
6753  */
6754     static char_u *
6755 string_quote(str, function)
6756     char_u	*str;
6757     int		function;
6758 {
6759     unsigned	len;
6760     char_u	*p, *r, *s;
6761 
6762     len = (function ? 13 : 3);
6763     if (str != NULL)
6764     {
6765 	len += STRLEN(str);
6766 	for (p = str; *p != NUL; mb_ptr_adv(p))
6767 	    if (*p == '\'')
6768 		++len;
6769     }
6770     s = r = alloc(len);
6771     if (r != NULL)
6772     {
6773 	if (function)
6774 	{
6775 	    STRCPY(r, "function('");
6776 	    r += 10;
6777 	}
6778 	else
6779 	    *r++ = '\'';
6780 	if (str != NULL)
6781 	    for (p = str; *p != NUL; )
6782 	    {
6783 		if (*p == '\'')
6784 		    *r++ = '\'';
6785 		MB_COPY_CHAR(p, r);
6786 	    }
6787 	*r++ = '\'';
6788 	if (function)
6789 	    *r++ = ')';
6790 	*r++ = NUL;
6791     }
6792     return s;
6793 }
6794 
6795 /*
6796  * Get the value of an environment variable.
6797  * "arg" is pointing to the '$'.  It is advanced to after the name.
6798  * If the environment variable was not set, silently assume it is empty.
6799  * Always return OK.
6800  */
6801     static int
6802 get_env_tv(arg, rettv, evaluate)
6803     char_u	**arg;
6804     typval_T	*rettv;
6805     int		evaluate;
6806 {
6807     char_u	*string = NULL;
6808     int		len;
6809     int		cc;
6810     char_u	*name;
6811     int		mustfree = FALSE;
6812 
6813     ++*arg;
6814     name = *arg;
6815     len = get_env_len(arg);
6816     if (evaluate)
6817     {
6818 	if (len != 0)
6819 	{
6820 	    cc = name[len];
6821 	    name[len] = NUL;
6822 	    /* first try vim_getenv(), fast for normal environment vars */
6823 	    string = vim_getenv(name, &mustfree);
6824 	    if (string != NULL && *string != NUL)
6825 	    {
6826 		if (!mustfree)
6827 		    string = vim_strsave(string);
6828 	    }
6829 	    else
6830 	    {
6831 		if (mustfree)
6832 		    vim_free(string);
6833 
6834 		/* next try expanding things like $VIM and ${HOME} */
6835 		string = expand_env_save(name - 1);
6836 		if (string != NULL && *string == '$')
6837 		{
6838 		    vim_free(string);
6839 		    string = NULL;
6840 		}
6841 	    }
6842 	    name[len] = cc;
6843 	}
6844 	rettv->v_type = VAR_STRING;
6845 	rettv->vval.v_string = string;
6846     }
6847 
6848     return OK;
6849 }
6850 
6851 /*
6852  * Array with names and number of arguments of all internal functions
6853  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6854  */
6855 static struct fst
6856 {
6857     char	*f_name;	/* function name */
6858     char	f_min_argc;	/* minimal number of arguments */
6859     char	f_max_argc;	/* maximal number of arguments */
6860     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6861 				/* implemenation of function */
6862 } functions[] =
6863 {
6864     {"add",		2, 2, f_add},
6865     {"append",		2, 2, f_append},
6866     {"argc",		0, 0, f_argc},
6867     {"argidx",		0, 0, f_argidx},
6868     {"argv",		1, 1, f_argv},
6869     {"browse",		4, 4, f_browse},
6870     {"browsedir",	2, 2, f_browsedir},
6871     {"bufexists",	1, 1, f_bufexists},
6872     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6873     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6874     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6875     {"buflisted",	1, 1, f_buflisted},
6876     {"bufloaded",	1, 1, f_bufloaded},
6877     {"bufname",		1, 1, f_bufname},
6878     {"bufnr",		1, 2, f_bufnr},
6879     {"bufwinnr",	1, 1, f_bufwinnr},
6880     {"byte2line",	1, 1, f_byte2line},
6881     {"byteidx",		2, 2, f_byteidx},
6882     {"call",		2, 3, f_call},
6883     {"char2nr",		1, 1, f_char2nr},
6884     {"cindent",		1, 1, f_cindent},
6885     {"col",		1, 1, f_col},
6886 #if defined(FEAT_INS_EXPAND)
6887     {"complete_add",	1, 1, f_complete_add},
6888     {"complete_check",	0, 0, f_complete_check},
6889 #endif
6890     {"confirm",		1, 4, f_confirm},
6891     {"copy",		1, 1, f_copy},
6892     {"count",		2, 4, f_count},
6893     {"cscope_connection",0,3, f_cscope_connection},
6894     {"cursor",		1, 3, f_cursor},
6895     {"deepcopy",	1, 2, f_deepcopy},
6896     {"delete",		1, 1, f_delete},
6897     {"did_filetype",	0, 0, f_did_filetype},
6898     {"diff_filler",	1, 1, f_diff_filler},
6899     {"diff_hlID",	2, 2, f_diff_hlID},
6900     {"empty",		1, 1, f_empty},
6901     {"escape",		2, 2, f_escape},
6902     {"eval",		1, 1, f_eval},
6903     {"eventhandler",	0, 0, f_eventhandler},
6904     {"executable",	1, 1, f_executable},
6905     {"exists",		1, 1, f_exists},
6906     {"expand",		1, 2, f_expand},
6907     {"extend",		2, 3, f_extend},
6908     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6909     {"filereadable",	1, 1, f_filereadable},
6910     {"filewritable",	1, 1, f_filewritable},
6911     {"filter",		2, 2, f_filter},
6912     {"finddir",		1, 3, f_finddir},
6913     {"findfile",	1, 3, f_findfile},
6914     {"fnamemodify",	2, 2, f_fnamemodify},
6915     {"foldclosed",	1, 1, f_foldclosed},
6916     {"foldclosedend",	1, 1, f_foldclosedend},
6917     {"foldlevel",	1, 1, f_foldlevel},
6918     {"foldtext",	0, 0, f_foldtext},
6919     {"foldtextresult",	1, 1, f_foldtextresult},
6920     {"foreground",	0, 0, f_foreground},
6921     {"function",	1, 1, f_function},
6922     {"garbagecollect",	0, 0, f_garbagecollect},
6923     {"get",		2, 3, f_get},
6924     {"getbufline",	2, 3, f_getbufline},
6925     {"getbufvar",	2, 2, f_getbufvar},
6926     {"getchar",		0, 1, f_getchar},
6927     {"getcharmod",	0, 0, f_getcharmod},
6928     {"getcmdline",	0, 0, f_getcmdline},
6929     {"getcmdpos",	0, 0, f_getcmdpos},
6930     {"getcmdtype",	0, 0, f_getcmdtype},
6931     {"getcwd",		0, 0, f_getcwd},
6932     {"getfontname",	0, 1, f_getfontname},
6933     {"getfperm",	1, 1, f_getfperm},
6934     {"getfsize",	1, 1, f_getfsize},
6935     {"getftime",	1, 1, f_getftime},
6936     {"getftype",	1, 1, f_getftype},
6937     {"getline",		1, 2, f_getline},
6938     {"getloclist",	1, 1, f_getqflist},
6939     {"getpos",		1, 1, f_getpos},
6940     {"getqflist",	0, 0, f_getqflist},
6941     {"getreg",		0, 2, f_getreg},
6942     {"getregtype",	0, 1, f_getregtype},
6943     {"getwinposx",	0, 0, f_getwinposx},
6944     {"getwinposy",	0, 0, f_getwinposy},
6945     {"getwinvar",	2, 2, f_getwinvar},
6946     {"glob",		1, 1, f_glob},
6947     {"globpath",	2, 2, f_globpath},
6948     {"has",		1, 1, f_has},
6949     {"has_key",		2, 2, f_has_key},
6950     {"hasmapto",	1, 2, f_hasmapto},
6951     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6952     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6953     {"histadd",		2, 2, f_histadd},
6954     {"histdel",		1, 2, f_histdel},
6955     {"histget",		1, 2, f_histget},
6956     {"histnr",		1, 1, f_histnr},
6957     {"hlID",		1, 1, f_hlID},
6958     {"hlexists",	1, 1, f_hlexists},
6959     {"hostname",	0, 0, f_hostname},
6960     {"iconv",		3, 3, f_iconv},
6961     {"indent",		1, 1, f_indent},
6962     {"index",		2, 4, f_index},
6963     {"input",		1, 3, f_input},
6964     {"inputdialog",	1, 3, f_inputdialog},
6965     {"inputlist",	1, 1, f_inputlist},
6966     {"inputrestore",	0, 0, f_inputrestore},
6967     {"inputsave",	0, 0, f_inputsave},
6968     {"inputsecret",	1, 2, f_inputsecret},
6969     {"insert",		2, 3, f_insert},
6970     {"isdirectory",	1, 1, f_isdirectory},
6971     {"islocked",	1, 1, f_islocked},
6972     {"items",		1, 1, f_items},
6973     {"join",		1, 2, f_join},
6974     {"keys",		1, 1, f_keys},
6975     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6976     {"len",		1, 1, f_len},
6977     {"libcall",		3, 3, f_libcall},
6978     {"libcallnr",	3, 3, f_libcallnr},
6979     {"line",		1, 1, f_line},
6980     {"line2byte",	1, 1, f_line2byte},
6981     {"lispindent",	1, 1, f_lispindent},
6982     {"localtime",	0, 0, f_localtime},
6983     {"map",		2, 2, f_map},
6984     {"maparg",		1, 2, f_maparg},
6985     {"mapcheck",	1, 2, f_mapcheck},
6986     {"match",		2, 4, f_match},
6987     {"matchend",	2, 4, f_matchend},
6988     {"matchlist",	2, 4, f_matchlist},
6989     {"matchstr",	2, 4, f_matchstr},
6990     {"max",		1, 1, f_max},
6991     {"min",		1, 1, f_min},
6992 #ifdef vim_mkdir
6993     {"mkdir",		1, 3, f_mkdir},
6994 #endif
6995     {"mode",		0, 0, f_mode},
6996     {"nextnonblank",	1, 1, f_nextnonblank},
6997     {"nr2char",		1, 1, f_nr2char},
6998     {"prevnonblank",	1, 1, f_prevnonblank},
6999     {"printf",		2, 19, f_printf},
7000     {"pumvisible",	0, 0, f_pumvisible},
7001     {"range",		1, 3, f_range},
7002     {"readfile",	1, 3, f_readfile},
7003     {"remote_expr",	2, 3, f_remote_expr},
7004     {"remote_foreground", 1, 1, f_remote_foreground},
7005     {"remote_peek",	1, 2, f_remote_peek},
7006     {"remote_read",	1, 1, f_remote_read},
7007     {"remote_send",	2, 3, f_remote_send},
7008     {"remove",		2, 3, f_remove},
7009     {"rename",		2, 2, f_rename},
7010     {"repeat",		2, 2, f_repeat},
7011     {"resolve",		1, 1, f_resolve},
7012     {"reverse",		1, 1, f_reverse},
7013     {"search",		1, 3, f_search},
7014     {"searchdecl",	1, 3, f_searchdecl},
7015     {"searchpair",	3, 6, f_searchpair},
7016     {"searchpairpos",	3, 6, f_searchpairpos},
7017     {"searchpos",	1, 3, f_searchpos},
7018     {"server2client",	2, 2, f_server2client},
7019     {"serverlist",	0, 0, f_serverlist},
7020     {"setbufvar",	3, 3, f_setbufvar},
7021     {"setcmdpos",	1, 1, f_setcmdpos},
7022     {"setline",		2, 2, f_setline},
7023     {"setloclist",	2, 3, f_setloclist},
7024     {"setpos",		2, 2, f_setpos},
7025     {"setqflist",	1, 2, f_setqflist},
7026     {"setreg",		2, 3, f_setreg},
7027     {"setwinvar",	3, 3, f_setwinvar},
7028     {"simplify",	1, 1, f_simplify},
7029     {"sort",		1, 2, f_sort},
7030     {"soundfold",	1, 1, f_soundfold},
7031     {"spellbadword",	0, 1, f_spellbadword},
7032     {"spellsuggest",	1, 3, f_spellsuggest},
7033     {"split",		1, 3, f_split},
7034 #ifdef HAVE_STRFTIME
7035     {"strftime",	1, 2, f_strftime},
7036 #endif
7037     {"stridx",		2, 3, f_stridx},
7038     {"string",		1, 1, f_string},
7039     {"strlen",		1, 1, f_strlen},
7040     {"strpart",		2, 3, f_strpart},
7041     {"strridx",		2, 3, f_strridx},
7042     {"strtrans",	1, 1, f_strtrans},
7043     {"submatch",	1, 1, f_submatch},
7044     {"substitute",	4, 4, f_substitute},
7045     {"synID",		3, 3, f_synID},
7046     {"synIDattr",	2, 3, f_synIDattr},
7047     {"synIDtrans",	1, 1, f_synIDtrans},
7048     {"system",		1, 2, f_system},
7049     {"tabpagebuflist",	0, 1, f_tabpagebuflist},
7050     {"tabpagenr",	0, 1, f_tabpagenr},
7051     {"tabpagewinnr",	1, 2, f_tabpagewinnr},
7052     {"tagfiles",	0, 0, f_tagfiles},
7053     {"taglist",		1, 1, f_taglist},
7054     {"tempname",	0, 0, f_tempname},
7055     {"test",		1, 1, f_test},
7056     {"tolower",		1, 1, f_tolower},
7057     {"toupper",		1, 1, f_toupper},
7058     {"tr",		3, 3, f_tr},
7059     {"type",		1, 1, f_type},
7060     {"values",		1, 1, f_values},
7061     {"virtcol",		1, 1, f_virtcol},
7062     {"visualmode",	0, 1, f_visualmode},
7063     {"winbufnr",	1, 1, f_winbufnr},
7064     {"wincol",		0, 0, f_wincol},
7065     {"winheight",	1, 1, f_winheight},
7066     {"winline",		0, 0, f_winline},
7067     {"winnr",		0, 1, f_winnr},
7068     {"winrestcmd",	0, 0, f_winrestcmd},
7069     {"winrestview",	1, 1, f_winrestview},
7070     {"winsaveview",	0, 0, f_winsaveview},
7071     {"winwidth",	1, 1, f_winwidth},
7072     {"writefile",	2, 3, f_writefile},
7073 };
7074 
7075 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
7076 
7077 /*
7078  * Function given to ExpandGeneric() to obtain the list of internal
7079  * or user defined function names.
7080  */
7081     char_u *
7082 get_function_name(xp, idx)
7083     expand_T	*xp;
7084     int		idx;
7085 {
7086     static int	intidx = -1;
7087     char_u	*name;
7088 
7089     if (idx == 0)
7090 	intidx = -1;
7091     if (intidx < 0)
7092     {
7093 	name = get_user_func_name(xp, idx);
7094 	if (name != NULL)
7095 	    return name;
7096     }
7097     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
7098     {
7099 	STRCPY(IObuff, functions[intidx].f_name);
7100 	STRCAT(IObuff, "(");
7101 	if (functions[intidx].f_max_argc == 0)
7102 	    STRCAT(IObuff, ")");
7103 	return IObuff;
7104     }
7105 
7106     return NULL;
7107 }
7108 
7109 /*
7110  * Function given to ExpandGeneric() to obtain the list of internal or
7111  * user defined variable or function names.
7112  */
7113 /*ARGSUSED*/
7114     char_u *
7115 get_expr_name(xp, idx)
7116     expand_T	*xp;
7117     int		idx;
7118 {
7119     static int	intidx = -1;
7120     char_u	*name;
7121 
7122     if (idx == 0)
7123 	intidx = -1;
7124     if (intidx < 0)
7125     {
7126 	name = get_function_name(xp, idx);
7127 	if (name != NULL)
7128 	    return name;
7129     }
7130     return get_user_var_name(xp, ++intidx);
7131 }
7132 
7133 #endif /* FEAT_CMDL_COMPL */
7134 
7135 /*
7136  * Find internal function in table above.
7137  * Return index, or -1 if not found
7138  */
7139     static int
7140 find_internal_func(name)
7141     char_u	*name;		/* name of the function */
7142 {
7143     int		first = 0;
7144     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
7145     int		cmp;
7146     int		x;
7147 
7148     /*
7149      * Find the function name in the table. Binary search.
7150      */
7151     while (first <= last)
7152     {
7153 	x = first + ((unsigned)(last - first) >> 1);
7154 	cmp = STRCMP(name, functions[x].f_name);
7155 	if (cmp < 0)
7156 	    last = x - 1;
7157 	else if (cmp > 0)
7158 	    first = x + 1;
7159 	else
7160 	    return x;
7161     }
7162     return -1;
7163 }
7164 
7165 /*
7166  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
7167  * name it contains, otherwise return "name".
7168  */
7169     static char_u *
7170 deref_func_name(name, lenp)
7171     char_u	*name;
7172     int		*lenp;
7173 {
7174     dictitem_T	*v;
7175     int		cc;
7176 
7177     cc = name[*lenp];
7178     name[*lenp] = NUL;
7179     v = find_var(name, NULL);
7180     name[*lenp] = cc;
7181     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
7182     {
7183 	if (v->di_tv.vval.v_string == NULL)
7184 	{
7185 	    *lenp = 0;
7186 	    return (char_u *)"";	/* just in case */
7187 	}
7188 	*lenp = STRLEN(v->di_tv.vval.v_string);
7189 	return v->di_tv.vval.v_string;
7190     }
7191 
7192     return name;
7193 }
7194 
7195 /*
7196  * Allocate a variable for the result of a function.
7197  * Return OK or FAIL.
7198  */
7199     static int
7200 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
7201 							   evaluate, selfdict)
7202     char_u	*name;		/* name of the function */
7203     int		len;		/* length of "name" */
7204     typval_T	*rettv;
7205     char_u	**arg;		/* argument, pointing to the '(' */
7206     linenr_T	firstline;	/* first line of range */
7207     linenr_T	lastline;	/* last line of range */
7208     int		*doesrange;	/* return: function handled range */
7209     int		evaluate;
7210     dict_T	*selfdict;	/* Dictionary for "self" */
7211 {
7212     char_u	*argp;
7213     int		ret = OK;
7214     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7215     int		argcount = 0;		/* number of arguments found */
7216 
7217     /*
7218      * Get the arguments.
7219      */
7220     argp = *arg;
7221     while (argcount < MAX_FUNC_ARGS)
7222     {
7223 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7224 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7225 	    break;
7226 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7227 	{
7228 	    ret = FAIL;
7229 	    break;
7230 	}
7231 	++argcount;
7232 	if (*argp != ',')
7233 	    break;
7234     }
7235     if (*argp == ')')
7236 	++argp;
7237     else
7238 	ret = FAIL;
7239 
7240     if (ret == OK)
7241 	ret = call_func(name, len, rettv, argcount, argvars,
7242 			  firstline, lastline, doesrange, evaluate, selfdict);
7243     else if (!aborting())
7244     {
7245 	if (argcount == MAX_FUNC_ARGS)
7246 	    emsg_funcname("E740: Too many arguments for function %s", name);
7247 	else
7248 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7249     }
7250 
7251     while (--argcount >= 0)
7252 	clear_tv(&argvars[argcount]);
7253 
7254     *arg = skipwhite(argp);
7255     return ret;
7256 }
7257 
7258 
7259 /*
7260  * Call a function with its resolved parameters
7261  * Return OK when the function can't be called,  FAIL otherwise.
7262  * Also returns OK when an error was encountered while executing the function.
7263  */
7264     static int
7265 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7266 						doesrange, evaluate, selfdict)
7267     char_u	*name;		/* name of the function */
7268     int		len;		/* length of "name" */
7269     typval_T	*rettv;		/* return value goes here */
7270     int		argcount;	/* number of "argvars" */
7271     typval_T	*argvars;	/* vars for arguments */
7272     linenr_T	firstline;	/* first line of range */
7273     linenr_T	lastline;	/* last line of range */
7274     int		*doesrange;	/* return: function handled range */
7275     int		evaluate;
7276     dict_T	*selfdict;	/* Dictionary for "self" */
7277 {
7278     int		ret = FAIL;
7279 #define ERROR_UNKNOWN	0
7280 #define ERROR_TOOMANY	1
7281 #define ERROR_TOOFEW	2
7282 #define ERROR_SCRIPT	3
7283 #define ERROR_DICT	4
7284 #define ERROR_NONE	5
7285 #define ERROR_OTHER	6
7286     int		error = ERROR_NONE;
7287     int		i;
7288     int		llen;
7289     ufunc_T	*fp;
7290     int		cc;
7291 #define FLEN_FIXED 40
7292     char_u	fname_buf[FLEN_FIXED + 1];
7293     char_u	*fname;
7294 
7295     /*
7296      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7297      * Change <SNR>123_name() to K_SNR 123_name().
7298      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7299      */
7300     cc = name[len];
7301     name[len] = NUL;
7302     llen = eval_fname_script(name);
7303     if (llen > 0)
7304     {
7305 	fname_buf[0] = K_SPECIAL;
7306 	fname_buf[1] = KS_EXTRA;
7307 	fname_buf[2] = (int)KE_SNR;
7308 	i = 3;
7309 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7310 	{
7311 	    if (current_SID <= 0)
7312 		error = ERROR_SCRIPT;
7313 	    else
7314 	    {
7315 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7316 		i = (int)STRLEN(fname_buf);
7317 	    }
7318 	}
7319 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7320 	{
7321 	    STRCPY(fname_buf + i, name + llen);
7322 	    fname = fname_buf;
7323 	}
7324 	else
7325 	{
7326 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7327 	    if (fname == NULL)
7328 		error = ERROR_OTHER;
7329 	    else
7330 	    {
7331 		mch_memmove(fname, fname_buf, (size_t)i);
7332 		STRCPY(fname + i, name + llen);
7333 	    }
7334 	}
7335     }
7336     else
7337 	fname = name;
7338 
7339     *doesrange = FALSE;
7340 
7341 
7342     /* execute the function if no errors detected and executing */
7343     if (evaluate && error == ERROR_NONE)
7344     {
7345 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7346 	error = ERROR_UNKNOWN;
7347 
7348 	if (!builtin_function(fname))
7349 	{
7350 	    /*
7351 	     * User defined function.
7352 	     */
7353 	    fp = find_func(fname);
7354 
7355 #ifdef FEAT_AUTOCMD
7356 	    /* Trigger FuncUndefined event, may load the function. */
7357 	    if (fp == NULL
7358 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7359 						     fname, fname, TRUE, NULL)
7360 		    && !aborting())
7361 	    {
7362 		/* executed an autocommand, search for the function again */
7363 		fp = find_func(fname);
7364 	    }
7365 #endif
7366 	    /* Try loading a package. */
7367 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7368 	    {
7369 		/* loaded a package, search for the function again */
7370 		fp = find_func(fname);
7371 	    }
7372 
7373 	    if (fp != NULL)
7374 	    {
7375 		if (fp->uf_flags & FC_RANGE)
7376 		    *doesrange = TRUE;
7377 		if (argcount < fp->uf_args.ga_len)
7378 		    error = ERROR_TOOFEW;
7379 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7380 		    error = ERROR_TOOMANY;
7381 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7382 		    error = ERROR_DICT;
7383 		else
7384 		{
7385 		    /*
7386 		     * Call the user function.
7387 		     * Save and restore search patterns, script variables and
7388 		     * redo buffer.
7389 		     */
7390 		    save_search_patterns();
7391 		    saveRedobuff();
7392 		    ++fp->uf_calls;
7393 		    call_user_func(fp, argcount, argvars, rettv,
7394 					       firstline, lastline,
7395 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7396 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7397 						      && fp->uf_refcount <= 0)
7398 			/* Function was unreferenced while being used, free it
7399 			 * now. */
7400 			func_free(fp);
7401 		    restoreRedobuff();
7402 		    restore_search_patterns();
7403 		    error = ERROR_NONE;
7404 		}
7405 	    }
7406 	}
7407 	else
7408 	{
7409 	    /*
7410 	     * Find the function name in the table, call its implementation.
7411 	     */
7412 	    i = find_internal_func(fname);
7413 	    if (i >= 0)
7414 	    {
7415 		if (argcount < functions[i].f_min_argc)
7416 		    error = ERROR_TOOFEW;
7417 		else if (argcount > functions[i].f_max_argc)
7418 		    error = ERROR_TOOMANY;
7419 		else
7420 		{
7421 		    argvars[argcount].v_type = VAR_UNKNOWN;
7422 		    functions[i].f_func(argvars, rettv);
7423 		    error = ERROR_NONE;
7424 		}
7425 	    }
7426 	}
7427 	/*
7428 	 * The function call (or "FuncUndefined" autocommand sequence) might
7429 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7430 	 * exception that has not been caught so far.  This situation can be
7431 	 * tested for by calling aborting().  For an error in an internal
7432 	 * function or for the "E132" error in call_user_func(), however, the
7433 	 * throw point at which the "force_abort" flag (temporarily reset by
7434 	 * emsg()) is normally updated has not been reached yet. We need to
7435 	 * update that flag first to make aborting() reliable.
7436 	 */
7437 	update_force_abort();
7438     }
7439     if (error == ERROR_NONE)
7440 	ret = OK;
7441 
7442     /*
7443      * Report an error unless the argument evaluation or function call has been
7444      * cancelled due to an aborting error, an interrupt, or an exception.
7445      */
7446     if (!aborting())
7447     {
7448 	switch (error)
7449 	{
7450 	    case ERROR_UNKNOWN:
7451 		    emsg_funcname("E117: Unknown function: %s", name);
7452 		    break;
7453 	    case ERROR_TOOMANY:
7454 		    emsg_funcname(e_toomanyarg, name);
7455 		    break;
7456 	    case ERROR_TOOFEW:
7457 		    emsg_funcname("E119: Not enough arguments for function: %s",
7458 									name);
7459 		    break;
7460 	    case ERROR_SCRIPT:
7461 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7462 									name);
7463 		    break;
7464 	    case ERROR_DICT:
7465 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7466 									name);
7467 		    break;
7468 	}
7469     }
7470 
7471     name[len] = cc;
7472     if (fname != name && fname != fname_buf)
7473 	vim_free(fname);
7474 
7475     return ret;
7476 }
7477 
7478 /*
7479  * Give an error message with a function name.  Handle <SNR> things.
7480  */
7481     static void
7482 emsg_funcname(msg, name)
7483     char	*msg;
7484     char_u	*name;
7485 {
7486     char_u	*p;
7487 
7488     if (*name == K_SPECIAL)
7489 	p = concat_str((char_u *)"<SNR>", name + 3);
7490     else
7491 	p = name;
7492     EMSG2(_(msg), p);
7493     if (p != name)
7494 	vim_free(p);
7495 }
7496 
7497 /*********************************************
7498  * Implementation of the built-in functions
7499  */
7500 
7501 /*
7502  * "add(list, item)" function
7503  */
7504     static void
7505 f_add(argvars, rettv)
7506     typval_T	*argvars;
7507     typval_T	*rettv;
7508 {
7509     list_T	*l;
7510 
7511     rettv->vval.v_number = 1; /* Default: Failed */
7512     if (argvars[0].v_type == VAR_LIST)
7513     {
7514 	if ((l = argvars[0].vval.v_list) != NULL
7515 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7516 		&& list_append_tv(l, &argvars[1]) == OK)
7517 	    copy_tv(&argvars[0], rettv);
7518     }
7519     else
7520 	EMSG(_(e_listreq));
7521 }
7522 
7523 /*
7524  * "append(lnum, string/list)" function
7525  */
7526     static void
7527 f_append(argvars, rettv)
7528     typval_T	*argvars;
7529     typval_T	*rettv;
7530 {
7531     long	lnum;
7532     char_u	*line;
7533     list_T	*l = NULL;
7534     listitem_T	*li = NULL;
7535     typval_T	*tv;
7536     long	added = 0;
7537 
7538     lnum = get_tv_lnum(argvars);
7539     if (lnum >= 0
7540 	    && lnum <= curbuf->b_ml.ml_line_count
7541 	    && u_save(lnum, lnum + 1) == OK)
7542     {
7543 	if (argvars[1].v_type == VAR_LIST)
7544 	{
7545 	    l = argvars[1].vval.v_list;
7546 	    if (l == NULL)
7547 		return;
7548 	    li = l->lv_first;
7549 	}
7550 	rettv->vval.v_number = 0;	/* Default: Success */
7551 	for (;;)
7552 	{
7553 	    if (l == NULL)
7554 		tv = &argvars[1];	/* append a string */
7555 	    else if (li == NULL)
7556 		break;			/* end of list */
7557 	    else
7558 		tv = &li->li_tv;	/* append item from list */
7559 	    line = get_tv_string_chk(tv);
7560 	    if (line == NULL)		/* type error */
7561 	    {
7562 		rettv->vval.v_number = 1;	/* Failed */
7563 		break;
7564 	    }
7565 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7566 	    ++added;
7567 	    if (l == NULL)
7568 		break;
7569 	    li = li->li_next;
7570 	}
7571 
7572 	appended_lines_mark(lnum, added);
7573 	if (curwin->w_cursor.lnum > lnum)
7574 	    curwin->w_cursor.lnum += added;
7575     }
7576     else
7577 	rettv->vval.v_number = 1;	/* Failed */
7578 }
7579 
7580 /*
7581  * "argc()" function
7582  */
7583 /* ARGSUSED */
7584     static void
7585 f_argc(argvars, rettv)
7586     typval_T	*argvars;
7587     typval_T	*rettv;
7588 {
7589     rettv->vval.v_number = ARGCOUNT;
7590 }
7591 
7592 /*
7593  * "argidx()" function
7594  */
7595 /* ARGSUSED */
7596     static void
7597 f_argidx(argvars, rettv)
7598     typval_T	*argvars;
7599     typval_T	*rettv;
7600 {
7601     rettv->vval.v_number = curwin->w_arg_idx;
7602 }
7603 
7604 /*
7605  * "argv(nr)" function
7606  */
7607     static void
7608 f_argv(argvars, rettv)
7609     typval_T	*argvars;
7610     typval_T	*rettv;
7611 {
7612     int		idx;
7613 
7614     idx = get_tv_number_chk(&argvars[0], NULL);
7615     if (idx >= 0 && idx < ARGCOUNT)
7616 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7617     else
7618 	rettv->vval.v_string = NULL;
7619     rettv->v_type = VAR_STRING;
7620 }
7621 
7622 /*
7623  * "browse(save, title, initdir, default)" function
7624  */
7625 /* ARGSUSED */
7626     static void
7627 f_browse(argvars, rettv)
7628     typval_T	*argvars;
7629     typval_T	*rettv;
7630 {
7631 #ifdef FEAT_BROWSE
7632     int		save;
7633     char_u	*title;
7634     char_u	*initdir;
7635     char_u	*defname;
7636     char_u	buf[NUMBUFLEN];
7637     char_u	buf2[NUMBUFLEN];
7638     int		error = FALSE;
7639 
7640     save = get_tv_number_chk(&argvars[0], &error);
7641     title = get_tv_string_chk(&argvars[1]);
7642     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7643     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7644 
7645     if (error || title == NULL || initdir == NULL || defname == NULL)
7646 	rettv->vval.v_string = NULL;
7647     else
7648 	rettv->vval.v_string =
7649 		 do_browse(save ? BROWSE_SAVE : 0,
7650 				 title, defname, NULL, initdir, NULL, curbuf);
7651 #else
7652     rettv->vval.v_string = NULL;
7653 #endif
7654     rettv->v_type = VAR_STRING;
7655 }
7656 
7657 /*
7658  * "browsedir(title, initdir)" function
7659  */
7660 /* ARGSUSED */
7661     static void
7662 f_browsedir(argvars, rettv)
7663     typval_T	*argvars;
7664     typval_T	*rettv;
7665 {
7666 #ifdef FEAT_BROWSE
7667     char_u	*title;
7668     char_u	*initdir;
7669     char_u	buf[NUMBUFLEN];
7670 
7671     title = get_tv_string_chk(&argvars[0]);
7672     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7673 
7674     if (title == NULL || initdir == NULL)
7675 	rettv->vval.v_string = NULL;
7676     else
7677 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7678 				    title, NULL, NULL, initdir, NULL, curbuf);
7679 #else
7680     rettv->vval.v_string = NULL;
7681 #endif
7682     rettv->v_type = VAR_STRING;
7683 }
7684 
7685 static buf_T *find_buffer __ARGS((typval_T *avar));
7686 
7687 /*
7688  * Find a buffer by number or exact name.
7689  */
7690     static buf_T *
7691 find_buffer(avar)
7692     typval_T	*avar;
7693 {
7694     buf_T	*buf = NULL;
7695 
7696     if (avar->v_type == VAR_NUMBER)
7697 	buf = buflist_findnr((int)avar->vval.v_number);
7698     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7699     {
7700 	buf = buflist_findname_exp(avar->vval.v_string);
7701 	if (buf == NULL)
7702 	{
7703 	    /* No full path name match, try a match with a URL or a "nofile"
7704 	     * buffer, these don't use the full path. */
7705 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7706 		if (buf->b_fname != NULL
7707 			&& (path_with_url(buf->b_fname)
7708 #ifdef FEAT_QUICKFIX
7709 			    || bt_nofile(buf)
7710 #endif
7711 			   )
7712 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7713 		    break;
7714 	}
7715     }
7716     return buf;
7717 }
7718 
7719 /*
7720  * "bufexists(expr)" function
7721  */
7722     static void
7723 f_bufexists(argvars, rettv)
7724     typval_T	*argvars;
7725     typval_T	*rettv;
7726 {
7727     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7728 }
7729 
7730 /*
7731  * "buflisted(expr)" function
7732  */
7733     static void
7734 f_buflisted(argvars, rettv)
7735     typval_T	*argvars;
7736     typval_T	*rettv;
7737 {
7738     buf_T	*buf;
7739 
7740     buf = find_buffer(&argvars[0]);
7741     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7742 }
7743 
7744 /*
7745  * "bufloaded(expr)" function
7746  */
7747     static void
7748 f_bufloaded(argvars, rettv)
7749     typval_T	*argvars;
7750     typval_T	*rettv;
7751 {
7752     buf_T	*buf;
7753 
7754     buf = find_buffer(&argvars[0]);
7755     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7756 }
7757 
7758 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7759 
7760 /*
7761  * Get buffer by number or pattern.
7762  */
7763     static buf_T *
7764 get_buf_tv(tv)
7765     typval_T	*tv;
7766 {
7767     char_u	*name = tv->vval.v_string;
7768     int		save_magic;
7769     char_u	*save_cpo;
7770     buf_T	*buf;
7771 
7772     if (tv->v_type == VAR_NUMBER)
7773 	return buflist_findnr((int)tv->vval.v_number);
7774     if (tv->v_type != VAR_STRING)
7775 	return NULL;
7776     if (name == NULL || *name == NUL)
7777 	return curbuf;
7778     if (name[0] == '$' && name[1] == NUL)
7779 	return lastbuf;
7780 
7781     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7782     save_magic = p_magic;
7783     p_magic = TRUE;
7784     save_cpo = p_cpo;
7785     p_cpo = (char_u *)"";
7786 
7787     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7788 								TRUE, FALSE));
7789 
7790     p_magic = save_magic;
7791     p_cpo = save_cpo;
7792 
7793     /* If not found, try expanding the name, like done for bufexists(). */
7794     if (buf == NULL)
7795 	buf = find_buffer(tv);
7796 
7797     return buf;
7798 }
7799 
7800 /*
7801  * "bufname(expr)" function
7802  */
7803     static void
7804 f_bufname(argvars, rettv)
7805     typval_T	*argvars;
7806     typval_T	*rettv;
7807 {
7808     buf_T	*buf;
7809 
7810     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7811     ++emsg_off;
7812     buf = get_buf_tv(&argvars[0]);
7813     rettv->v_type = VAR_STRING;
7814     if (buf != NULL && buf->b_fname != NULL)
7815 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7816     else
7817 	rettv->vval.v_string = NULL;
7818     --emsg_off;
7819 }
7820 
7821 /*
7822  * "bufnr(expr)" function
7823  */
7824     static void
7825 f_bufnr(argvars, rettv)
7826     typval_T	*argvars;
7827     typval_T	*rettv;
7828 {
7829     buf_T	*buf;
7830     int		error = FALSE;
7831     char_u	*name;
7832 
7833     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7834     ++emsg_off;
7835     buf = get_buf_tv(&argvars[0]);
7836     --emsg_off;
7837 
7838     /* If the buffer isn't found and the second argument is not zero create a
7839      * new buffer. */
7840     if (buf == NULL
7841 	    && argvars[1].v_type != VAR_UNKNOWN
7842 	    && get_tv_number_chk(&argvars[1], &error) != 0
7843 	    && !error
7844 	    && (name = get_tv_string_chk(&argvars[0])) != NULL
7845 	    && !error)
7846 	buf = buflist_new(name, NULL, (linenr_T)1, 0);
7847 
7848     if (buf != NULL)
7849 	rettv->vval.v_number = buf->b_fnum;
7850     else
7851 	rettv->vval.v_number = -1;
7852 }
7853 
7854 /*
7855  * "bufwinnr(nr)" function
7856  */
7857     static void
7858 f_bufwinnr(argvars, rettv)
7859     typval_T	*argvars;
7860     typval_T	*rettv;
7861 {
7862 #ifdef FEAT_WINDOWS
7863     win_T	*wp;
7864     int		winnr = 0;
7865 #endif
7866     buf_T	*buf;
7867 
7868     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7869     ++emsg_off;
7870     buf = get_buf_tv(&argvars[0]);
7871 #ifdef FEAT_WINDOWS
7872     for (wp = firstwin; wp; wp = wp->w_next)
7873     {
7874 	++winnr;
7875 	if (wp->w_buffer == buf)
7876 	    break;
7877     }
7878     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7879 #else
7880     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7881 #endif
7882     --emsg_off;
7883 }
7884 
7885 /*
7886  * "byte2line(byte)" function
7887  */
7888 /*ARGSUSED*/
7889     static void
7890 f_byte2line(argvars, rettv)
7891     typval_T	*argvars;
7892     typval_T	*rettv;
7893 {
7894 #ifndef FEAT_BYTEOFF
7895     rettv->vval.v_number = -1;
7896 #else
7897     long	boff = 0;
7898 
7899     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7900     if (boff < 0)
7901 	rettv->vval.v_number = -1;
7902     else
7903 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7904 							  (linenr_T)0, &boff);
7905 #endif
7906 }
7907 
7908 /*
7909  * "byteidx()" function
7910  */
7911 /*ARGSUSED*/
7912     static void
7913 f_byteidx(argvars, rettv)
7914     typval_T	*argvars;
7915     typval_T	*rettv;
7916 {
7917 #ifdef FEAT_MBYTE
7918     char_u	*t;
7919 #endif
7920     char_u	*str;
7921     long	idx;
7922 
7923     str = get_tv_string_chk(&argvars[0]);
7924     idx = get_tv_number_chk(&argvars[1], NULL);
7925     rettv->vval.v_number = -1;
7926     if (str == NULL || idx < 0)
7927 	return;
7928 
7929 #ifdef FEAT_MBYTE
7930     t = str;
7931     for ( ; idx > 0; idx--)
7932     {
7933 	if (*t == NUL)		/* EOL reached */
7934 	    return;
7935 	t += (*mb_ptr2len)(t);
7936     }
7937     rettv->vval.v_number = t - str;
7938 #else
7939     if (idx <= STRLEN(str))
7940 	rettv->vval.v_number = idx;
7941 #endif
7942 }
7943 
7944 /*
7945  * "call(func, arglist)" function
7946  */
7947     static void
7948 f_call(argvars, rettv)
7949     typval_T	*argvars;
7950     typval_T	*rettv;
7951 {
7952     char_u	*func;
7953     typval_T	argv[MAX_FUNC_ARGS];
7954     int		argc = 0;
7955     listitem_T	*item;
7956     int		dummy;
7957     dict_T	*selfdict = NULL;
7958 
7959     rettv->vval.v_number = 0;
7960     if (argvars[1].v_type != VAR_LIST)
7961     {
7962 	EMSG(_(e_listreq));
7963 	return;
7964     }
7965     if (argvars[1].vval.v_list == NULL)
7966 	return;
7967 
7968     if (argvars[0].v_type == VAR_FUNC)
7969 	func = argvars[0].vval.v_string;
7970     else
7971 	func = get_tv_string(&argvars[0]);
7972     if (*func == NUL)
7973 	return;		/* type error or empty name */
7974 
7975     if (argvars[2].v_type != VAR_UNKNOWN)
7976     {
7977 	if (argvars[2].v_type != VAR_DICT)
7978 	{
7979 	    EMSG(_(e_dictreq));
7980 	    return;
7981 	}
7982 	selfdict = argvars[2].vval.v_dict;
7983     }
7984 
7985     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7986 							 item = item->li_next)
7987     {
7988 	if (argc == MAX_FUNC_ARGS)
7989 	{
7990 	    EMSG(_("E699: Too many arguments"));
7991 	    break;
7992 	}
7993 	/* Make a copy of each argument.  This is needed to be able to set
7994 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7995 	 */
7996 	copy_tv(&item->li_tv, &argv[argc++]);
7997     }
7998 
7999     if (item == NULL)
8000 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
8001 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
8002 						      &dummy, TRUE, selfdict);
8003 
8004     /* Free the arguments. */
8005     while (argc > 0)
8006 	clear_tv(&argv[--argc]);
8007 }
8008 
8009 /*
8010  * "char2nr(string)" function
8011  */
8012     static void
8013 f_char2nr(argvars, rettv)
8014     typval_T	*argvars;
8015     typval_T	*rettv;
8016 {
8017 #ifdef FEAT_MBYTE
8018     if (has_mbyte)
8019 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
8020     else
8021 #endif
8022     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
8023 }
8024 
8025 /*
8026  * "cindent(lnum)" function
8027  */
8028     static void
8029 f_cindent(argvars, rettv)
8030     typval_T	*argvars;
8031     typval_T	*rettv;
8032 {
8033 #ifdef FEAT_CINDENT
8034     pos_T	pos;
8035     linenr_T	lnum;
8036 
8037     pos = curwin->w_cursor;
8038     lnum = get_tv_lnum(argvars);
8039     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8040     {
8041 	curwin->w_cursor.lnum = lnum;
8042 	rettv->vval.v_number = get_c_indent();
8043 	curwin->w_cursor = pos;
8044     }
8045     else
8046 #endif
8047 	rettv->vval.v_number = -1;
8048 }
8049 
8050 /*
8051  * "col(string)" function
8052  */
8053     static void
8054 f_col(argvars, rettv)
8055     typval_T	*argvars;
8056     typval_T	*rettv;
8057 {
8058     colnr_T	col = 0;
8059     pos_T	*fp;
8060     int		fnum = curbuf->b_fnum;
8061 
8062     fp = var2fpos(&argvars[0], FALSE, &fnum);
8063     if (fp != NULL && fnum == curbuf->b_fnum)
8064     {
8065 	if (fp->col == MAXCOL)
8066 	{
8067 	    /* '> can be MAXCOL, get the length of the line then */
8068 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
8069 		col = STRLEN(ml_get(fp->lnum)) + 1;
8070 	    else
8071 		col = MAXCOL;
8072 	}
8073 	else
8074 	{
8075 	    col = fp->col + 1;
8076 #ifdef FEAT_VIRTUALEDIT
8077 	    /* col(".") when the cursor is on the NUL at the end of the line
8078 	     * because of "coladd" can be seen as an extra column. */
8079 	    if (virtual_active() && fp == &curwin->w_cursor)
8080 	    {
8081 		char_u	*p = ml_get_cursor();
8082 
8083 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
8084 				 curwin->w_virtcol - curwin->w_cursor.coladd))
8085 		{
8086 # ifdef FEAT_MBYTE
8087 		    int		l;
8088 
8089 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
8090 			col += l;
8091 # else
8092 		    if (*p != NUL && p[1] == NUL)
8093 			++col;
8094 # endif
8095 		}
8096 	    }
8097 #endif
8098 	}
8099     }
8100     rettv->vval.v_number = col;
8101 }
8102 
8103 #if defined(FEAT_INS_EXPAND)
8104 /*
8105  * "complete_add()" function
8106  */
8107 /*ARGSUSED*/
8108     static void
8109 f_complete_add(argvars, rettv)
8110     typval_T	*argvars;
8111     typval_T	*rettv;
8112 {
8113     char_u	*word;
8114     char_u	*extra = NULL;
8115     int		icase = FALSE;
8116 
8117     if (argvars[0].v_type == VAR_DICT && argvars[0].vval.v_dict != NULL)
8118     {
8119 	word = get_dict_string(argvars[0].vval.v_dict,
8120 						     (char_u *)"word", FALSE);
8121 	extra = get_dict_string(argvars[0].vval.v_dict,
8122 						     (char_u *)"menu", FALSE);
8123 	icase = get_dict_number(argvars[0].vval.v_dict, (char_u *)"icase");
8124     }
8125     else
8126 	word = get_tv_string_chk(&argvars[0]);
8127     if (word != NULL)
8128 	rettv->vval.v_number = ins_compl_add(word, -1, icase,
8129 							   NULL, extra, 0, 0);
8130 }
8131 
8132 /*
8133  * "complete_check()" function
8134  */
8135 /*ARGSUSED*/
8136     static void
8137 f_complete_check(argvars, rettv)
8138     typval_T	*argvars;
8139     typval_T	*rettv;
8140 {
8141     int		saved = RedrawingDisabled;
8142 
8143     RedrawingDisabled = 0;
8144     ins_compl_check_keys(0);
8145     rettv->vval.v_number = compl_interrupted;
8146     RedrawingDisabled = saved;
8147 }
8148 #endif
8149 
8150 /*
8151  * "confirm(message, buttons[, default [, type]])" function
8152  */
8153 /*ARGSUSED*/
8154     static void
8155 f_confirm(argvars, rettv)
8156     typval_T	*argvars;
8157     typval_T	*rettv;
8158 {
8159 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
8160     char_u	*message;
8161     char_u	*buttons = NULL;
8162     char_u	buf[NUMBUFLEN];
8163     char_u	buf2[NUMBUFLEN];
8164     int		def = 1;
8165     int		type = VIM_GENERIC;
8166     char_u	*typestr;
8167     int		error = FALSE;
8168 
8169     message = get_tv_string_chk(&argvars[0]);
8170     if (message == NULL)
8171 	error = TRUE;
8172     if (argvars[1].v_type != VAR_UNKNOWN)
8173     {
8174 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
8175 	if (buttons == NULL)
8176 	    error = TRUE;
8177 	if (argvars[2].v_type != VAR_UNKNOWN)
8178 	{
8179 	    def = get_tv_number_chk(&argvars[2], &error);
8180 	    if (argvars[3].v_type != VAR_UNKNOWN)
8181 	    {
8182 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
8183 		if (typestr == NULL)
8184 		    error = TRUE;
8185 		else
8186 		{
8187 		    switch (TOUPPER_ASC(*typestr))
8188 		    {
8189 			case 'E': type = VIM_ERROR; break;
8190 			case 'Q': type = VIM_QUESTION; break;
8191 			case 'I': type = VIM_INFO; break;
8192 			case 'W': type = VIM_WARNING; break;
8193 			case 'G': type = VIM_GENERIC; break;
8194 		    }
8195 		}
8196 	    }
8197 	}
8198     }
8199 
8200     if (buttons == NULL || *buttons == NUL)
8201 	buttons = (char_u *)_("&Ok");
8202 
8203     if (error)
8204 	rettv->vval.v_number = 0;
8205     else
8206 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
8207 								   def, NULL);
8208 #else
8209     rettv->vval.v_number = 0;
8210 #endif
8211 }
8212 
8213 /*
8214  * "copy()" function
8215  */
8216     static void
8217 f_copy(argvars, rettv)
8218     typval_T	*argvars;
8219     typval_T	*rettv;
8220 {
8221     item_copy(&argvars[0], rettv, FALSE, 0);
8222 }
8223 
8224 /*
8225  * "count()" function
8226  */
8227     static void
8228 f_count(argvars, rettv)
8229     typval_T	*argvars;
8230     typval_T	*rettv;
8231 {
8232     long	n = 0;
8233     int		ic = FALSE;
8234 
8235     if (argvars[0].v_type == VAR_LIST)
8236     {
8237 	listitem_T	*li;
8238 	list_T		*l;
8239 	long		idx;
8240 
8241 	if ((l = argvars[0].vval.v_list) != NULL)
8242 	{
8243 	    li = l->lv_first;
8244 	    if (argvars[2].v_type != VAR_UNKNOWN)
8245 	    {
8246 		int error = FALSE;
8247 
8248 		ic = get_tv_number_chk(&argvars[2], &error);
8249 		if (argvars[3].v_type != VAR_UNKNOWN)
8250 		{
8251 		    idx = get_tv_number_chk(&argvars[3], &error);
8252 		    if (!error)
8253 		    {
8254 			li = list_find(l, idx);
8255 			if (li == NULL)
8256 			    EMSGN(_(e_listidx), idx);
8257 		    }
8258 		}
8259 		if (error)
8260 		    li = NULL;
8261 	    }
8262 
8263 	    for ( ; li != NULL; li = li->li_next)
8264 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8265 		    ++n;
8266 	}
8267     }
8268     else if (argvars[0].v_type == VAR_DICT)
8269     {
8270 	int		todo;
8271 	dict_T		*d;
8272 	hashitem_T	*hi;
8273 
8274 	if ((d = argvars[0].vval.v_dict) != NULL)
8275 	{
8276 	    int error = FALSE;
8277 
8278 	    if (argvars[2].v_type != VAR_UNKNOWN)
8279 	    {
8280 		ic = get_tv_number_chk(&argvars[2], &error);
8281 		if (argvars[3].v_type != VAR_UNKNOWN)
8282 		    EMSG(_(e_invarg));
8283 	    }
8284 
8285 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8286 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8287 	    {
8288 		if (!HASHITEM_EMPTY(hi))
8289 		{
8290 		    --todo;
8291 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8292 			++n;
8293 		}
8294 	    }
8295 	}
8296     }
8297     else
8298 	EMSG2(_(e_listdictarg), "count()");
8299     rettv->vval.v_number = n;
8300 }
8301 
8302 /*
8303  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8304  *
8305  * Checks the existence of a cscope connection.
8306  */
8307 /*ARGSUSED*/
8308     static void
8309 f_cscope_connection(argvars, rettv)
8310     typval_T	*argvars;
8311     typval_T	*rettv;
8312 {
8313 #ifdef FEAT_CSCOPE
8314     int		num = 0;
8315     char_u	*dbpath = NULL;
8316     char_u	*prepend = NULL;
8317     char_u	buf[NUMBUFLEN];
8318 
8319     if (argvars[0].v_type != VAR_UNKNOWN
8320 	    && argvars[1].v_type != VAR_UNKNOWN)
8321     {
8322 	num = (int)get_tv_number(&argvars[0]);
8323 	dbpath = get_tv_string(&argvars[1]);
8324 	if (argvars[2].v_type != VAR_UNKNOWN)
8325 	    prepend = get_tv_string_buf(&argvars[2], buf);
8326     }
8327 
8328     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8329 #else
8330     rettv->vval.v_number = 0;
8331 #endif
8332 }
8333 
8334 /*
8335  * "cursor(lnum, col)" function
8336  *
8337  * Moves the cursor to the specified line and column
8338  */
8339 /*ARGSUSED*/
8340     static void
8341 f_cursor(argvars, rettv)
8342     typval_T	*argvars;
8343     typval_T	*rettv;
8344 {
8345     long	line, col;
8346 #ifdef FEAT_VIRTUALEDIT
8347     long	coladd = 0;
8348 #endif
8349 
8350     if (argvars[1].v_type == VAR_UNKNOWN)
8351     {
8352 	pos_T	    pos;
8353 
8354 	if (list2fpos(argvars, &pos, NULL) == FAIL)
8355 	    return;
8356 	line = pos.lnum;
8357 	col = pos.col;
8358 #ifdef FEAT_VIRTUALEDIT
8359 	coladd = pos.coladd;
8360 #endif
8361     }
8362     else
8363     {
8364 	line = get_tv_lnum(argvars);
8365 	col = get_tv_number_chk(&argvars[1], NULL);
8366 #ifdef FEAT_VIRTUALEDIT
8367 	if (argvars[2].v_type != VAR_UNKNOWN)
8368 	    coladd = get_tv_number_chk(&argvars[2], NULL);
8369 #endif
8370     }
8371     if (line < 0 || col < 0
8372 #ifdef FEAT_VIRTUALEDIT
8373 			    || coladd < 0
8374 #endif
8375 	    )
8376 	return;		/* type error; errmsg already given */
8377     if (line > 0)
8378 	curwin->w_cursor.lnum = line;
8379     if (col > 0)
8380 	curwin->w_cursor.col = col - 1;
8381 #ifdef FEAT_VIRTUALEDIT
8382     curwin->w_cursor.coladd = coladd;
8383 #endif
8384 
8385     /* Make sure the cursor is in a valid position. */
8386     check_cursor();
8387 #ifdef FEAT_MBYTE
8388     /* Correct cursor for multi-byte character. */
8389     if (has_mbyte)
8390 	mb_adjust_cursor();
8391 #endif
8392 
8393     curwin->w_set_curswant = TRUE;
8394 }
8395 
8396 /*
8397  * "deepcopy()" function
8398  */
8399     static void
8400 f_deepcopy(argvars, rettv)
8401     typval_T	*argvars;
8402     typval_T	*rettv;
8403 {
8404     int		noref = 0;
8405 
8406     if (argvars[1].v_type != VAR_UNKNOWN)
8407 	noref = get_tv_number_chk(&argvars[1], NULL);
8408     if (noref < 0 || noref > 1)
8409 	EMSG(_(e_invarg));
8410     else
8411 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8412 }
8413 
8414 /*
8415  * "delete()" function
8416  */
8417     static void
8418 f_delete(argvars, rettv)
8419     typval_T	*argvars;
8420     typval_T	*rettv;
8421 {
8422     if (check_restricted() || check_secure())
8423 	rettv->vval.v_number = -1;
8424     else
8425 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8426 }
8427 
8428 /*
8429  * "did_filetype()" function
8430  */
8431 /*ARGSUSED*/
8432     static void
8433 f_did_filetype(argvars, rettv)
8434     typval_T	*argvars;
8435     typval_T	*rettv;
8436 {
8437 #ifdef FEAT_AUTOCMD
8438     rettv->vval.v_number = did_filetype;
8439 #else
8440     rettv->vval.v_number = 0;
8441 #endif
8442 }
8443 
8444 /*
8445  * "diff_filler()" function
8446  */
8447 /*ARGSUSED*/
8448     static void
8449 f_diff_filler(argvars, rettv)
8450     typval_T	*argvars;
8451     typval_T	*rettv;
8452 {
8453 #ifdef FEAT_DIFF
8454     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8455 #endif
8456 }
8457 
8458 /*
8459  * "diff_hlID()" function
8460  */
8461 /*ARGSUSED*/
8462     static void
8463 f_diff_hlID(argvars, rettv)
8464     typval_T	*argvars;
8465     typval_T	*rettv;
8466 {
8467 #ifdef FEAT_DIFF
8468     linenr_T		lnum = get_tv_lnum(argvars);
8469     static linenr_T	prev_lnum = 0;
8470     static int		changedtick = 0;
8471     static int		fnum = 0;
8472     static int		change_start = 0;
8473     static int		change_end = 0;
8474     static hlf_T	hlID = 0;
8475     int			filler_lines;
8476     int			col;
8477 
8478     if (lnum < 0)	/* ignore type error in {lnum} arg */
8479 	lnum = 0;
8480     if (lnum != prev_lnum
8481 	    || changedtick != curbuf->b_changedtick
8482 	    || fnum != curbuf->b_fnum)
8483     {
8484 	/* New line, buffer, change: need to get the values. */
8485 	filler_lines = diff_check(curwin, lnum);
8486 	if (filler_lines < 0)
8487 	{
8488 	    if (filler_lines == -1)
8489 	    {
8490 		change_start = MAXCOL;
8491 		change_end = -1;
8492 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8493 		    hlID = HLF_ADD;	/* added line */
8494 		else
8495 		    hlID = HLF_CHD;	/* changed line */
8496 	    }
8497 	    else
8498 		hlID = HLF_ADD;	/* added line */
8499 	}
8500 	else
8501 	    hlID = (hlf_T)0;
8502 	prev_lnum = lnum;
8503 	changedtick = curbuf->b_changedtick;
8504 	fnum = curbuf->b_fnum;
8505     }
8506 
8507     if (hlID == HLF_CHD || hlID == HLF_TXD)
8508     {
8509 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8510 	if (col >= change_start && col <= change_end)
8511 	    hlID = HLF_TXD;			/* changed text */
8512 	else
8513 	    hlID = HLF_CHD;			/* changed line */
8514     }
8515     rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
8516 #endif
8517 }
8518 
8519 /*
8520  * "empty({expr})" function
8521  */
8522     static void
8523 f_empty(argvars, rettv)
8524     typval_T	*argvars;
8525     typval_T	*rettv;
8526 {
8527     int		n;
8528 
8529     switch (argvars[0].v_type)
8530     {
8531 	case VAR_STRING:
8532 	case VAR_FUNC:
8533 	    n = argvars[0].vval.v_string == NULL
8534 					  || *argvars[0].vval.v_string == NUL;
8535 	    break;
8536 	case VAR_NUMBER:
8537 	    n = argvars[0].vval.v_number == 0;
8538 	    break;
8539 	case VAR_LIST:
8540 	    n = argvars[0].vval.v_list == NULL
8541 				  || argvars[0].vval.v_list->lv_first == NULL;
8542 	    break;
8543 	case VAR_DICT:
8544 	    n = argvars[0].vval.v_dict == NULL
8545 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8546 	    break;
8547 	default:
8548 	    EMSG2(_(e_intern2), "f_empty()");
8549 	    n = 0;
8550     }
8551 
8552     rettv->vval.v_number = n;
8553 }
8554 
8555 /*
8556  * "escape({string}, {chars})" function
8557  */
8558     static void
8559 f_escape(argvars, rettv)
8560     typval_T	*argvars;
8561     typval_T	*rettv;
8562 {
8563     char_u	buf[NUMBUFLEN];
8564 
8565     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8566 					 get_tv_string_buf(&argvars[1], buf));
8567     rettv->v_type = VAR_STRING;
8568 }
8569 
8570 /*
8571  * "eval()" function
8572  */
8573 /*ARGSUSED*/
8574     static void
8575 f_eval(argvars, rettv)
8576     typval_T	*argvars;
8577     typval_T	*rettv;
8578 {
8579     char_u	*s;
8580 
8581     s = get_tv_string_chk(&argvars[0]);
8582     if (s != NULL)
8583 	s = skipwhite(s);
8584 
8585     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8586     {
8587 	rettv->v_type = VAR_NUMBER;
8588 	rettv->vval.v_number = 0;
8589     }
8590     else if (*s != NUL)
8591 	EMSG(_(e_trailing));
8592 }
8593 
8594 /*
8595  * "eventhandler()" function
8596  */
8597 /*ARGSUSED*/
8598     static void
8599 f_eventhandler(argvars, rettv)
8600     typval_T	*argvars;
8601     typval_T	*rettv;
8602 {
8603     rettv->vval.v_number = vgetc_busy;
8604 }
8605 
8606 /*
8607  * "executable()" function
8608  */
8609     static void
8610 f_executable(argvars, rettv)
8611     typval_T	*argvars;
8612     typval_T	*rettv;
8613 {
8614     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8615 }
8616 
8617 /*
8618  * "exists()" function
8619  */
8620     static void
8621 f_exists(argvars, rettv)
8622     typval_T	*argvars;
8623     typval_T	*rettv;
8624 {
8625     char_u	*p;
8626     char_u	*name;
8627     int		n = FALSE;
8628     int		len = 0;
8629 
8630     p = get_tv_string(&argvars[0]);
8631     if (*p == '$')			/* environment variable */
8632     {
8633 	/* first try "normal" environment variables (fast) */
8634 	if (mch_getenv(p + 1) != NULL)
8635 	    n = TRUE;
8636 	else
8637 	{
8638 	    /* try expanding things like $VIM and ${HOME} */
8639 	    p = expand_env_save(p);
8640 	    if (p != NULL && *p != '$')
8641 		n = TRUE;
8642 	    vim_free(p);
8643 	}
8644     }
8645     else if (*p == '&' || *p == '+')			/* option */
8646 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8647     else if (*p == '*')			/* internal or user defined function */
8648     {
8649 	n = function_exists(p + 1);
8650     }
8651     else if (*p == ':')
8652     {
8653 	n = cmd_exists(p + 1);
8654     }
8655     else if (*p == '#')
8656     {
8657 #ifdef FEAT_AUTOCMD
8658 	if (p[1] == '#')
8659 	    n = autocmd_supported(p + 2);
8660 	else
8661 	    n = au_exists(p + 1);
8662 #endif
8663     }
8664     else				/* internal variable */
8665     {
8666 	char_u	    *tofree;
8667 	typval_T    tv;
8668 
8669 	/* get_name_len() takes care of expanding curly braces */
8670 	name = p;
8671 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8672 	if (len > 0)
8673 	{
8674 	    if (tofree != NULL)
8675 		name = tofree;
8676 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8677 	    if (n)
8678 	    {
8679 		/* handle d.key, l[idx], f(expr) */
8680 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8681 		if (n)
8682 		    clear_tv(&tv);
8683 	    }
8684 	}
8685 
8686 	vim_free(tofree);
8687     }
8688 
8689     rettv->vval.v_number = n;
8690 }
8691 
8692 /*
8693  * "expand()" function
8694  */
8695     static void
8696 f_expand(argvars, rettv)
8697     typval_T	*argvars;
8698     typval_T	*rettv;
8699 {
8700     char_u	*s;
8701     int		len;
8702     char_u	*errormsg;
8703     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8704     expand_T	xpc;
8705     int		error = FALSE;
8706 
8707     rettv->v_type = VAR_STRING;
8708     s = get_tv_string(&argvars[0]);
8709     if (*s == '%' || *s == '#' || *s == '<')
8710     {
8711 	++emsg_off;
8712 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8713 	--emsg_off;
8714     }
8715     else
8716     {
8717 	/* When the optional second argument is non-zero, don't remove matches
8718 	 * for 'suffixes' and 'wildignore' */
8719 	if (argvars[1].v_type != VAR_UNKNOWN
8720 				    && get_tv_number_chk(&argvars[1], &error))
8721 	    flags |= WILD_KEEP_ALL;
8722 	if (!error)
8723 	{
8724 	    ExpandInit(&xpc);
8725 	    xpc.xp_context = EXPAND_FILES;
8726 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8727 	    ExpandCleanup(&xpc);
8728 	}
8729 	else
8730 	    rettv->vval.v_string = NULL;
8731     }
8732 }
8733 
8734 /*
8735  * "extend(list, list [, idx])" function
8736  * "extend(dict, dict [, action])" function
8737  */
8738     static void
8739 f_extend(argvars, rettv)
8740     typval_T	*argvars;
8741     typval_T	*rettv;
8742 {
8743     rettv->vval.v_number = 0;
8744     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8745     {
8746 	list_T		*l1, *l2;
8747 	listitem_T	*item;
8748 	long		before;
8749 	int		error = FALSE;
8750 
8751 	l1 = argvars[0].vval.v_list;
8752 	l2 = argvars[1].vval.v_list;
8753 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8754 		&& l2 != NULL)
8755 	{
8756 	    if (argvars[2].v_type != VAR_UNKNOWN)
8757 	    {
8758 		before = get_tv_number_chk(&argvars[2], &error);
8759 		if (error)
8760 		    return;		/* type error; errmsg already given */
8761 
8762 		if (before == l1->lv_len)
8763 		    item = NULL;
8764 		else
8765 		{
8766 		    item = list_find(l1, before);
8767 		    if (item == NULL)
8768 		    {
8769 			EMSGN(_(e_listidx), before);
8770 			return;
8771 		    }
8772 		}
8773 	    }
8774 	    else
8775 		item = NULL;
8776 	    list_extend(l1, l2, item);
8777 
8778 	    copy_tv(&argvars[0], rettv);
8779 	}
8780     }
8781     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8782     {
8783 	dict_T		*d1, *d2;
8784 	dictitem_T	*di1;
8785 	char_u		*action;
8786 	int		i;
8787 	hashitem_T	*hi2;
8788 	int		todo;
8789 
8790 	d1 = argvars[0].vval.v_dict;
8791 	d2 = argvars[1].vval.v_dict;
8792 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8793 		&& d2 != NULL)
8794 	{
8795 	    /* Check the third argument. */
8796 	    if (argvars[2].v_type != VAR_UNKNOWN)
8797 	    {
8798 		static char *(av[]) = {"keep", "force", "error"};
8799 
8800 		action = get_tv_string_chk(&argvars[2]);
8801 		if (action == NULL)
8802 		    return;		/* type error; errmsg already given */
8803 		for (i = 0; i < 3; ++i)
8804 		    if (STRCMP(action, av[i]) == 0)
8805 			break;
8806 		if (i == 3)
8807 		{
8808 		    EMSGN(_(e_invarg2), action);
8809 		    return;
8810 		}
8811 	    }
8812 	    else
8813 		action = (char_u *)"force";
8814 
8815 	    /* Go over all entries in the second dict and add them to the
8816 	     * first dict. */
8817 	    todo = d2->dv_hashtab.ht_used;
8818 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8819 	    {
8820 		if (!HASHITEM_EMPTY(hi2))
8821 		{
8822 		    --todo;
8823 		    di1 = dict_find(d1, hi2->hi_key, -1);
8824 		    if (di1 == NULL)
8825 		    {
8826 			di1 = dictitem_copy(HI2DI(hi2));
8827 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8828 			    dictitem_free(di1);
8829 		    }
8830 		    else if (*action == 'e')
8831 		    {
8832 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8833 			break;
8834 		    }
8835 		    else if (*action == 'f')
8836 		    {
8837 			clear_tv(&di1->di_tv);
8838 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8839 		    }
8840 		}
8841 	    }
8842 
8843 	    copy_tv(&argvars[0], rettv);
8844 	}
8845     }
8846     else
8847 	EMSG2(_(e_listdictarg), "extend()");
8848 }
8849 
8850 /*
8851  * "filereadable()" function
8852  */
8853     static void
8854 f_filereadable(argvars, rettv)
8855     typval_T	*argvars;
8856     typval_T	*rettv;
8857 {
8858     FILE	*fd;
8859     char_u	*p;
8860     int		n;
8861 
8862     p = get_tv_string(&argvars[0]);
8863     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8864     {
8865 	n = TRUE;
8866 	fclose(fd);
8867     }
8868     else
8869 	n = FALSE;
8870 
8871     rettv->vval.v_number = n;
8872 }
8873 
8874 /*
8875  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8876  * rights to write into.
8877  */
8878     static void
8879 f_filewritable(argvars, rettv)
8880     typval_T	*argvars;
8881     typval_T	*rettv;
8882 {
8883     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8884 }
8885 
8886 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8887 
8888     static void
8889 findfilendir(argvars, rettv, dir)
8890     typval_T	*argvars;
8891     typval_T	*rettv;
8892     int		dir;
8893 {
8894 #ifdef FEAT_SEARCHPATH
8895     char_u	*fname;
8896     char_u	*fresult = NULL;
8897     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8898     char_u	*p;
8899     char_u	pathbuf[NUMBUFLEN];
8900     int		count = 1;
8901     int		first = TRUE;
8902 
8903     fname = get_tv_string(&argvars[0]);
8904 
8905     if (argvars[1].v_type != VAR_UNKNOWN)
8906     {
8907 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8908 	if (p == NULL)
8909 	    count = -1;	    /* error */
8910 	else
8911 	{
8912 	    if (*p != NUL)
8913 		path = p;
8914 
8915 	    if (argvars[2].v_type != VAR_UNKNOWN)
8916 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8917 	}
8918     }
8919 
8920     if (*fname != NUL && count >= 0)
8921     {
8922 	do
8923 	{
8924 	    vim_free(fresult);
8925 	    fresult = find_file_in_path_option(first ? fname : NULL,
8926 					       first ? (int)STRLEN(fname) : 0,
8927 					       0, first, path, dir, NULL);
8928 	    first = FALSE;
8929 	} while (--count > 0 && fresult != NULL);
8930     }
8931 
8932     rettv->vval.v_string = fresult;
8933 #else
8934     rettv->vval.v_string = NULL;
8935 #endif
8936     rettv->v_type = VAR_STRING;
8937 }
8938 
8939 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8940 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8941 
8942 /*
8943  * Implementation of map() and filter().
8944  */
8945     static void
8946 filter_map(argvars, rettv, map)
8947     typval_T	*argvars;
8948     typval_T	*rettv;
8949     int		map;
8950 {
8951     char_u	buf[NUMBUFLEN];
8952     char_u	*expr;
8953     listitem_T	*li, *nli;
8954     list_T	*l = NULL;
8955     dictitem_T	*di;
8956     hashtab_T	*ht;
8957     hashitem_T	*hi;
8958     dict_T	*d = NULL;
8959     typval_T	save_val;
8960     typval_T	save_key;
8961     int		rem;
8962     int		todo;
8963     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8964     int		save_did_emsg;
8965 
8966     rettv->vval.v_number = 0;
8967     if (argvars[0].v_type == VAR_LIST)
8968     {
8969 	if ((l = argvars[0].vval.v_list) == NULL
8970 		|| (map && tv_check_lock(l->lv_lock, msg)))
8971 	    return;
8972     }
8973     else if (argvars[0].v_type == VAR_DICT)
8974     {
8975 	if ((d = argvars[0].vval.v_dict) == NULL
8976 		|| (map && tv_check_lock(d->dv_lock, msg)))
8977 	    return;
8978     }
8979     else
8980     {
8981 	EMSG2(_(e_listdictarg), msg);
8982 	return;
8983     }
8984 
8985     expr = get_tv_string_buf_chk(&argvars[1], buf);
8986     /* On type errors, the preceding call has already displayed an error
8987      * message.  Avoid a misleading error message for an empty string that
8988      * was not passed as argument. */
8989     if (expr != NULL)
8990     {
8991 	prepare_vimvar(VV_VAL, &save_val);
8992 	expr = skipwhite(expr);
8993 
8994 	/* We reset "did_emsg" to be able to detect whether an error
8995 	 * occurred during evaluation of the expression. */
8996 	save_did_emsg = did_emsg;
8997 	did_emsg = FALSE;
8998 
8999 	if (argvars[0].v_type == VAR_DICT)
9000 	{
9001 	    prepare_vimvar(VV_KEY, &save_key);
9002 	    vimvars[VV_KEY].vv_type = VAR_STRING;
9003 
9004 	    ht = &d->dv_hashtab;
9005 	    hash_lock(ht);
9006 	    todo = ht->ht_used;
9007 	    for (hi = ht->ht_array; todo > 0; ++hi)
9008 	    {
9009 		if (!HASHITEM_EMPTY(hi))
9010 		{
9011 		    --todo;
9012 		    di = HI2DI(hi);
9013 		    if (tv_check_lock(di->di_tv.v_lock, msg))
9014 			break;
9015 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
9016 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL
9017 								  || did_emsg)
9018 			break;
9019 		    if (!map && rem)
9020 			dictitem_remove(d, di);
9021 		    clear_tv(&vimvars[VV_KEY].vv_tv);
9022 		}
9023 	    }
9024 	    hash_unlock(ht);
9025 
9026 	    restore_vimvar(VV_KEY, &save_key);
9027 	}
9028 	else
9029 	{
9030 	    for (li = l->lv_first; li != NULL; li = nli)
9031 	    {
9032 		if (tv_check_lock(li->li_tv.v_lock, msg))
9033 		    break;
9034 		nli = li->li_next;
9035 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
9036 								  || did_emsg)
9037 		    break;
9038 		if (!map && rem)
9039 		    listitem_remove(l, li);
9040 	    }
9041 	}
9042 
9043 	restore_vimvar(VV_VAL, &save_val);
9044 
9045 	did_emsg |= save_did_emsg;
9046     }
9047 
9048     copy_tv(&argvars[0], rettv);
9049 }
9050 
9051     static int
9052 filter_map_one(tv, expr, map, remp)
9053     typval_T	*tv;
9054     char_u	*expr;
9055     int		map;
9056     int		*remp;
9057 {
9058     typval_T	rettv;
9059     char_u	*s;
9060 
9061     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
9062     s = expr;
9063     if (eval1(&s, &rettv, TRUE) == FAIL)
9064 	return FAIL;
9065     if (*s != NUL)  /* check for trailing chars after expr */
9066     {
9067 	EMSG2(_(e_invexpr2), s);
9068 	return FAIL;
9069     }
9070     if (map)
9071     {
9072 	/* map(): replace the list item value */
9073 	clear_tv(tv);
9074 	rettv.v_lock = 0;
9075 	*tv = rettv;
9076     }
9077     else
9078     {
9079 	int	    error = FALSE;
9080 
9081 	/* filter(): when expr is zero remove the item */
9082 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
9083 	clear_tv(&rettv);
9084 	/* On type error, nothing has been removed; return FAIL to stop the
9085 	 * loop.  The error message was given by get_tv_number_chk(). */
9086 	if (error)
9087 	    return FAIL;
9088     }
9089     clear_tv(&vimvars[VV_VAL].vv_tv);
9090     return OK;
9091 }
9092 
9093 /*
9094  * "filter()" function
9095  */
9096     static void
9097 f_filter(argvars, rettv)
9098     typval_T	*argvars;
9099     typval_T	*rettv;
9100 {
9101     filter_map(argvars, rettv, FALSE);
9102 }
9103 
9104 /*
9105  * "finddir({fname}[, {path}[, {count}]])" function
9106  */
9107     static void
9108 f_finddir(argvars, rettv)
9109     typval_T	*argvars;
9110     typval_T	*rettv;
9111 {
9112     findfilendir(argvars, rettv, TRUE);
9113 }
9114 
9115 /*
9116  * "findfile({fname}[, {path}[, {count}]])" function
9117  */
9118     static void
9119 f_findfile(argvars, rettv)
9120     typval_T	*argvars;
9121     typval_T	*rettv;
9122 {
9123     findfilendir(argvars, rettv, FALSE);
9124 }
9125 
9126 /*
9127  * "fnamemodify({fname}, {mods})" function
9128  */
9129     static void
9130 f_fnamemodify(argvars, rettv)
9131     typval_T	*argvars;
9132     typval_T	*rettv;
9133 {
9134     char_u	*fname;
9135     char_u	*mods;
9136     int		usedlen = 0;
9137     int		len;
9138     char_u	*fbuf = NULL;
9139     char_u	buf[NUMBUFLEN];
9140 
9141     fname = get_tv_string_chk(&argvars[0]);
9142     mods = get_tv_string_buf_chk(&argvars[1], buf);
9143     if (fname == NULL || mods == NULL)
9144 	fname = NULL;
9145     else
9146     {
9147 	len = (int)STRLEN(fname);
9148 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
9149     }
9150 
9151     rettv->v_type = VAR_STRING;
9152     if (fname == NULL)
9153 	rettv->vval.v_string = NULL;
9154     else
9155 	rettv->vval.v_string = vim_strnsave(fname, len);
9156     vim_free(fbuf);
9157 }
9158 
9159 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
9160 
9161 /*
9162  * "foldclosed()" function
9163  */
9164     static void
9165 foldclosed_both(argvars, rettv, end)
9166     typval_T	*argvars;
9167     typval_T	*rettv;
9168     int		end;
9169 {
9170 #ifdef FEAT_FOLDING
9171     linenr_T	lnum;
9172     linenr_T	first, last;
9173 
9174     lnum = get_tv_lnum(argvars);
9175     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9176     {
9177 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
9178 	{
9179 	    if (end)
9180 		rettv->vval.v_number = (varnumber_T)last;
9181 	    else
9182 		rettv->vval.v_number = (varnumber_T)first;
9183 	    return;
9184 	}
9185     }
9186 #endif
9187     rettv->vval.v_number = -1;
9188 }
9189 
9190 /*
9191  * "foldclosed()" function
9192  */
9193     static void
9194 f_foldclosed(argvars, rettv)
9195     typval_T	*argvars;
9196     typval_T	*rettv;
9197 {
9198     foldclosed_both(argvars, rettv, FALSE);
9199 }
9200 
9201 /*
9202  * "foldclosedend()" function
9203  */
9204     static void
9205 f_foldclosedend(argvars, rettv)
9206     typval_T	*argvars;
9207     typval_T	*rettv;
9208 {
9209     foldclosed_both(argvars, rettv, TRUE);
9210 }
9211 
9212 /*
9213  * "foldlevel()" function
9214  */
9215     static void
9216 f_foldlevel(argvars, rettv)
9217     typval_T	*argvars;
9218     typval_T	*rettv;
9219 {
9220 #ifdef FEAT_FOLDING
9221     linenr_T	lnum;
9222 
9223     lnum = get_tv_lnum(argvars);
9224     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
9225 	rettv->vval.v_number = foldLevel(lnum);
9226     else
9227 #endif
9228 	rettv->vval.v_number = 0;
9229 }
9230 
9231 /*
9232  * "foldtext()" function
9233  */
9234 /*ARGSUSED*/
9235     static void
9236 f_foldtext(argvars, rettv)
9237     typval_T	*argvars;
9238     typval_T	*rettv;
9239 {
9240 #ifdef FEAT_FOLDING
9241     linenr_T	lnum;
9242     char_u	*s;
9243     char_u	*r;
9244     int		len;
9245     char	*txt;
9246 #endif
9247 
9248     rettv->v_type = VAR_STRING;
9249     rettv->vval.v_string = NULL;
9250 #ifdef FEAT_FOLDING
9251     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
9252 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
9253 						 <= curbuf->b_ml.ml_line_count
9254 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
9255     {
9256 	/* Find first non-empty line in the fold. */
9257 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
9258 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9259 	{
9260 	    if (!linewhite(lnum))
9261 		break;
9262 	    ++lnum;
9263 	}
9264 
9265 	/* Find interesting text in this line. */
9266 	s = skipwhite(ml_get(lnum));
9267 	/* skip C comment-start */
9268 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9269 	{
9270 	    s = skipwhite(s + 2);
9271 	    if (*skipwhite(s) == NUL
9272 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9273 	    {
9274 		s = skipwhite(ml_get(lnum + 1));
9275 		if (*s == '*')
9276 		    s = skipwhite(s + 1);
9277 	    }
9278 	}
9279 	txt = _("+-%s%3ld lines: ");
9280 	r = alloc((unsigned)(STRLEN(txt)
9281 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9282 		    + 20				    /* for %3ld */
9283 		    + STRLEN(s)));			    /* concatenated */
9284 	if (r != NULL)
9285 	{
9286 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9287 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9288 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9289 	    len = (int)STRLEN(r);
9290 	    STRCAT(r, s);
9291 	    /* remove 'foldmarker' and 'commentstring' */
9292 	    foldtext_cleanup(r + len);
9293 	    rettv->vval.v_string = r;
9294 	}
9295     }
9296 #endif
9297 }
9298 
9299 /*
9300  * "foldtextresult(lnum)" function
9301  */
9302 /*ARGSUSED*/
9303     static void
9304 f_foldtextresult(argvars, rettv)
9305     typval_T	*argvars;
9306     typval_T	*rettv;
9307 {
9308 #ifdef FEAT_FOLDING
9309     linenr_T	lnum;
9310     char_u	*text;
9311     char_u	buf[51];
9312     foldinfo_T  foldinfo;
9313     int		fold_count;
9314 #endif
9315 
9316     rettv->v_type = VAR_STRING;
9317     rettv->vval.v_string = NULL;
9318 #ifdef FEAT_FOLDING
9319     lnum = get_tv_lnum(argvars);
9320     /* treat illegal types and illegal string values for {lnum} the same */
9321     if (lnum < 0)
9322 	lnum = 0;
9323     fold_count = foldedCount(curwin, lnum, &foldinfo);
9324     if (fold_count > 0)
9325     {
9326 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9327 							      &foldinfo, buf);
9328 	if (text == buf)
9329 	    text = vim_strsave(text);
9330 	rettv->vval.v_string = text;
9331     }
9332 #endif
9333 }
9334 
9335 /*
9336  * "foreground()" function
9337  */
9338 /*ARGSUSED*/
9339     static void
9340 f_foreground(argvars, rettv)
9341     typval_T	*argvars;
9342     typval_T	*rettv;
9343 {
9344     rettv->vval.v_number = 0;
9345 #ifdef FEAT_GUI
9346     if (gui.in_use)
9347 	gui_mch_set_foreground();
9348 #else
9349 # ifdef WIN32
9350     win32_set_foreground();
9351 # endif
9352 #endif
9353 }
9354 
9355 /*
9356  * "function()" function
9357  */
9358 /*ARGSUSED*/
9359     static void
9360 f_function(argvars, rettv)
9361     typval_T	*argvars;
9362     typval_T	*rettv;
9363 {
9364     char_u	*s;
9365 
9366     rettv->vval.v_number = 0;
9367     s = get_tv_string(&argvars[0]);
9368     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9369 	EMSG2(_(e_invarg2), s);
9370     else if (!function_exists(s))
9371 	EMSG2(_("E700: Unknown function: %s"), s);
9372     else
9373     {
9374 	rettv->vval.v_string = vim_strsave(s);
9375 	rettv->v_type = VAR_FUNC;
9376     }
9377 }
9378 
9379 /*
9380  * "garbagecollect()" function
9381  */
9382 /*ARGSUSED*/
9383     static void
9384 f_garbagecollect(argvars, rettv)
9385     typval_T	*argvars;
9386     typval_T	*rettv;
9387 {
9388     garbage_collect();
9389 }
9390 
9391 /*
9392  * "get()" function
9393  */
9394     static void
9395 f_get(argvars, rettv)
9396     typval_T	*argvars;
9397     typval_T	*rettv;
9398 {
9399     listitem_T	*li;
9400     list_T	*l;
9401     dictitem_T	*di;
9402     dict_T	*d;
9403     typval_T	*tv = NULL;
9404 
9405     if (argvars[0].v_type == VAR_LIST)
9406     {
9407 	if ((l = argvars[0].vval.v_list) != NULL)
9408 	{
9409 	    int		error = FALSE;
9410 
9411 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9412 	    if (!error && li != NULL)
9413 		tv = &li->li_tv;
9414 	}
9415     }
9416     else if (argvars[0].v_type == VAR_DICT)
9417     {
9418 	if ((d = argvars[0].vval.v_dict) != NULL)
9419 	{
9420 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9421 	    if (di != NULL)
9422 		tv = &di->di_tv;
9423 	}
9424     }
9425     else
9426 	EMSG2(_(e_listdictarg), "get()");
9427 
9428     if (tv == NULL)
9429     {
9430 	if (argvars[2].v_type == VAR_UNKNOWN)
9431 	    rettv->vval.v_number = 0;
9432 	else
9433 	    copy_tv(&argvars[2], rettv);
9434     }
9435     else
9436 	copy_tv(tv, rettv);
9437 }
9438 
9439 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9440 
9441 /*
9442  * Get line or list of lines from buffer "buf" into "rettv".
9443  * Return a range (from start to end) of lines in rettv from the specified
9444  * buffer.
9445  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9446  */
9447     static void
9448 get_buffer_lines(buf, start, end, retlist, rettv)
9449     buf_T	*buf;
9450     linenr_T	start;
9451     linenr_T	end;
9452     int		retlist;
9453     typval_T	*rettv;
9454 {
9455     char_u	*p;
9456 
9457     if (retlist)
9458     {
9459 	if (rettv_list_alloc(rettv) == FAIL)
9460 	    return;
9461     }
9462     else
9463 	rettv->vval.v_number = 0;
9464 
9465     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9466 	return;
9467 
9468     if (!retlist)
9469     {
9470 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9471 	    p = ml_get_buf(buf, start, FALSE);
9472 	else
9473 	    p = (char_u *)"";
9474 
9475 	rettv->v_type = VAR_STRING;
9476 	rettv->vval.v_string = vim_strsave(p);
9477     }
9478     else
9479     {
9480 	if (end < start)
9481 	    return;
9482 
9483 	if (start < 1)
9484 	    start = 1;
9485 	if (end > buf->b_ml.ml_line_count)
9486 	    end = buf->b_ml.ml_line_count;
9487 	while (start <= end)
9488 	    if (list_append_string(rettv->vval.v_list,
9489 				 ml_get_buf(buf, start++, FALSE), -1) == FAIL)
9490 		break;
9491     }
9492 }
9493 
9494 /*
9495  * "getbufline()" function
9496  */
9497     static void
9498 f_getbufline(argvars, rettv)
9499     typval_T	*argvars;
9500     typval_T	*rettv;
9501 {
9502     linenr_T	lnum;
9503     linenr_T	end;
9504     buf_T	*buf;
9505 
9506     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9507     ++emsg_off;
9508     buf = get_buf_tv(&argvars[0]);
9509     --emsg_off;
9510 
9511     lnum = get_tv_lnum_buf(&argvars[1], buf);
9512     if (argvars[2].v_type == VAR_UNKNOWN)
9513 	end = lnum;
9514     else
9515 	end = get_tv_lnum_buf(&argvars[2], buf);
9516 
9517     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9518 }
9519 
9520 /*
9521  * "getbufvar()" function
9522  */
9523     static void
9524 f_getbufvar(argvars, rettv)
9525     typval_T	*argvars;
9526     typval_T	*rettv;
9527 {
9528     buf_T	*buf;
9529     buf_T	*save_curbuf;
9530     char_u	*varname;
9531     dictitem_T	*v;
9532 
9533     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9534     varname = get_tv_string_chk(&argvars[1]);
9535     ++emsg_off;
9536     buf = get_buf_tv(&argvars[0]);
9537 
9538     rettv->v_type = VAR_STRING;
9539     rettv->vval.v_string = NULL;
9540 
9541     if (buf != NULL && varname != NULL)
9542     {
9543 	if (*varname == '&')	/* buffer-local-option */
9544 	{
9545 	    /* set curbuf to be our buf, temporarily */
9546 	    save_curbuf = curbuf;
9547 	    curbuf = buf;
9548 
9549 	    get_option_tv(&varname, rettv, TRUE);
9550 
9551 	    /* restore previous notion of curbuf */
9552 	    curbuf = save_curbuf;
9553 	}
9554 	else
9555 	{
9556 	    if (*varname == NUL)
9557 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9558 		 * scope prefix before the NUL byte is required by
9559 		 * find_var_in_ht(). */
9560 		varname = (char_u *)"b:" + 2;
9561 	    /* look up the variable */
9562 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9563 	    if (v != NULL)
9564 		copy_tv(&v->di_tv, rettv);
9565 	}
9566     }
9567 
9568     --emsg_off;
9569 }
9570 
9571 /*
9572  * "getchar()" function
9573  */
9574     static void
9575 f_getchar(argvars, rettv)
9576     typval_T	*argvars;
9577     typval_T	*rettv;
9578 {
9579     varnumber_T		n;
9580     int			error = FALSE;
9581 
9582     ++no_mapping;
9583     ++allow_keys;
9584     if (argvars[0].v_type == VAR_UNKNOWN)
9585 	/* getchar(): blocking wait. */
9586 	n = safe_vgetc();
9587     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9588 	/* getchar(1): only check if char avail */
9589 	n = vpeekc();
9590     else if (error || vpeekc() == NUL)
9591 	/* illegal argument or getchar(0) and no char avail: return zero */
9592 	n = 0;
9593     else
9594 	/* getchar(0) and char avail: return char */
9595 	n = safe_vgetc();
9596     --no_mapping;
9597     --allow_keys;
9598 
9599     rettv->vval.v_number = n;
9600     if (IS_SPECIAL(n) || mod_mask != 0)
9601     {
9602 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9603 	int		i = 0;
9604 
9605 	/* Turn a special key into three bytes, plus modifier. */
9606 	if (mod_mask != 0)
9607 	{
9608 	    temp[i++] = K_SPECIAL;
9609 	    temp[i++] = KS_MODIFIER;
9610 	    temp[i++] = mod_mask;
9611 	}
9612 	if (IS_SPECIAL(n))
9613 	{
9614 	    temp[i++] = K_SPECIAL;
9615 	    temp[i++] = K_SECOND(n);
9616 	    temp[i++] = K_THIRD(n);
9617 	}
9618 #ifdef FEAT_MBYTE
9619 	else if (has_mbyte)
9620 	    i += (*mb_char2bytes)(n, temp + i);
9621 #endif
9622 	else
9623 	    temp[i++] = n;
9624 	temp[i++] = NUL;
9625 	rettv->v_type = VAR_STRING;
9626 	rettv->vval.v_string = vim_strsave(temp);
9627     }
9628 }
9629 
9630 /*
9631  * "getcharmod()" function
9632  */
9633 /*ARGSUSED*/
9634     static void
9635 f_getcharmod(argvars, rettv)
9636     typval_T	*argvars;
9637     typval_T	*rettv;
9638 {
9639     rettv->vval.v_number = mod_mask;
9640 }
9641 
9642 /*
9643  * "getcmdline()" function
9644  */
9645 /*ARGSUSED*/
9646     static void
9647 f_getcmdline(argvars, rettv)
9648     typval_T	*argvars;
9649     typval_T	*rettv;
9650 {
9651     rettv->v_type = VAR_STRING;
9652     rettv->vval.v_string = get_cmdline_str();
9653 }
9654 
9655 /*
9656  * "getcmdpos()" function
9657  */
9658 /*ARGSUSED*/
9659     static void
9660 f_getcmdpos(argvars, rettv)
9661     typval_T	*argvars;
9662     typval_T	*rettv;
9663 {
9664     rettv->vval.v_number = get_cmdline_pos() + 1;
9665 }
9666 
9667 /*
9668  * "getcmdtype()" function
9669  */
9670 /*ARGSUSED*/
9671     static void
9672 f_getcmdtype(argvars, rettv)
9673     typval_T	*argvars;
9674     typval_T	*rettv;
9675 {
9676     rettv->v_type = VAR_STRING;
9677     rettv->vval.v_string = alloc(2);
9678     if (rettv->vval.v_string != NULL)
9679     {
9680 	rettv->vval.v_string[0] = get_cmdline_type();
9681 	rettv->vval.v_string[1] = NUL;
9682     }
9683 }
9684 
9685 /*
9686  * "getcwd()" function
9687  */
9688 /*ARGSUSED*/
9689     static void
9690 f_getcwd(argvars, rettv)
9691     typval_T	*argvars;
9692     typval_T	*rettv;
9693 {
9694     char_u	cwd[MAXPATHL];
9695 
9696     rettv->v_type = VAR_STRING;
9697     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9698 	rettv->vval.v_string = NULL;
9699     else
9700     {
9701 	rettv->vval.v_string = vim_strsave(cwd);
9702 #ifdef BACKSLASH_IN_FILENAME
9703 	if (rettv->vval.v_string != NULL)
9704 	    slash_adjust(rettv->vval.v_string);
9705 #endif
9706     }
9707 }
9708 
9709 /*
9710  * "getfontname()" function
9711  */
9712 /*ARGSUSED*/
9713     static void
9714 f_getfontname(argvars, rettv)
9715     typval_T	*argvars;
9716     typval_T	*rettv;
9717 {
9718     rettv->v_type = VAR_STRING;
9719     rettv->vval.v_string = NULL;
9720 #ifdef FEAT_GUI
9721     if (gui.in_use)
9722     {
9723 	GuiFont font;
9724 	char_u	*name = NULL;
9725 
9726 	if (argvars[0].v_type == VAR_UNKNOWN)
9727 	{
9728 	    /* Get the "Normal" font.  Either the name saved by
9729 	     * hl_set_font_name() or from the font ID. */
9730 	    font = gui.norm_font;
9731 	    name = hl_get_font_name();
9732 	}
9733 	else
9734 	{
9735 	    name = get_tv_string(&argvars[0]);
9736 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9737 		return;
9738 	    font = gui_mch_get_font(name, FALSE);
9739 	    if (font == NOFONT)
9740 		return;	    /* Invalid font name, return empty string. */
9741 	}
9742 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9743 	if (argvars[0].v_type != VAR_UNKNOWN)
9744 	    gui_mch_free_font(font);
9745     }
9746 #endif
9747 }
9748 
9749 /*
9750  * "getfperm({fname})" function
9751  */
9752     static void
9753 f_getfperm(argvars, rettv)
9754     typval_T	*argvars;
9755     typval_T	*rettv;
9756 {
9757     char_u	*fname;
9758     struct stat st;
9759     char_u	*perm = NULL;
9760     char_u	flags[] = "rwx";
9761     int		i;
9762 
9763     fname = get_tv_string(&argvars[0]);
9764 
9765     rettv->v_type = VAR_STRING;
9766     if (mch_stat((char *)fname, &st) >= 0)
9767     {
9768 	perm = vim_strsave((char_u *)"---------");
9769 	if (perm != NULL)
9770 	{
9771 	    for (i = 0; i < 9; i++)
9772 	    {
9773 		if (st.st_mode & (1 << (8 - i)))
9774 		    perm[i] = flags[i % 3];
9775 	    }
9776 	}
9777     }
9778     rettv->vval.v_string = perm;
9779 }
9780 
9781 /*
9782  * "getfsize({fname})" function
9783  */
9784     static void
9785 f_getfsize(argvars, rettv)
9786     typval_T	*argvars;
9787     typval_T	*rettv;
9788 {
9789     char_u	*fname;
9790     struct stat	st;
9791 
9792     fname = get_tv_string(&argvars[0]);
9793 
9794     rettv->v_type = VAR_NUMBER;
9795 
9796     if (mch_stat((char *)fname, &st) >= 0)
9797     {
9798 	if (mch_isdir(fname))
9799 	    rettv->vval.v_number = 0;
9800 	else
9801 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9802     }
9803     else
9804 	  rettv->vval.v_number = -1;
9805 }
9806 
9807 /*
9808  * "getftime({fname})" function
9809  */
9810     static void
9811 f_getftime(argvars, rettv)
9812     typval_T	*argvars;
9813     typval_T	*rettv;
9814 {
9815     char_u	*fname;
9816     struct stat	st;
9817 
9818     fname = get_tv_string(&argvars[0]);
9819 
9820     if (mch_stat((char *)fname, &st) >= 0)
9821 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9822     else
9823 	rettv->vval.v_number = -1;
9824 }
9825 
9826 /*
9827  * "getftype({fname})" function
9828  */
9829     static void
9830 f_getftype(argvars, rettv)
9831     typval_T	*argvars;
9832     typval_T	*rettv;
9833 {
9834     char_u	*fname;
9835     struct stat st;
9836     char_u	*type = NULL;
9837     char	*t;
9838 
9839     fname = get_tv_string(&argvars[0]);
9840 
9841     rettv->v_type = VAR_STRING;
9842     if (mch_lstat((char *)fname, &st) >= 0)
9843     {
9844 #ifdef S_ISREG
9845 	if (S_ISREG(st.st_mode))
9846 	    t = "file";
9847 	else if (S_ISDIR(st.st_mode))
9848 	    t = "dir";
9849 # ifdef S_ISLNK
9850 	else if (S_ISLNK(st.st_mode))
9851 	    t = "link";
9852 # endif
9853 # ifdef S_ISBLK
9854 	else if (S_ISBLK(st.st_mode))
9855 	    t = "bdev";
9856 # endif
9857 # ifdef S_ISCHR
9858 	else if (S_ISCHR(st.st_mode))
9859 	    t = "cdev";
9860 # endif
9861 # ifdef S_ISFIFO
9862 	else if (S_ISFIFO(st.st_mode))
9863 	    t = "fifo";
9864 # endif
9865 # ifdef S_ISSOCK
9866 	else if (S_ISSOCK(st.st_mode))
9867 	    t = "fifo";
9868 # endif
9869 	else
9870 	    t = "other";
9871 #else
9872 # ifdef S_IFMT
9873 	switch (st.st_mode & S_IFMT)
9874 	{
9875 	    case S_IFREG: t = "file"; break;
9876 	    case S_IFDIR: t = "dir"; break;
9877 #  ifdef S_IFLNK
9878 	    case S_IFLNK: t = "link"; break;
9879 #  endif
9880 #  ifdef S_IFBLK
9881 	    case S_IFBLK: t = "bdev"; break;
9882 #  endif
9883 #  ifdef S_IFCHR
9884 	    case S_IFCHR: t = "cdev"; break;
9885 #  endif
9886 #  ifdef S_IFIFO
9887 	    case S_IFIFO: t = "fifo"; break;
9888 #  endif
9889 #  ifdef S_IFSOCK
9890 	    case S_IFSOCK: t = "socket"; break;
9891 #  endif
9892 	    default: t = "other";
9893 	}
9894 # else
9895 	if (mch_isdir(fname))
9896 	    t = "dir";
9897 	else
9898 	    t = "file";
9899 # endif
9900 #endif
9901 	type = vim_strsave((char_u *)t);
9902     }
9903     rettv->vval.v_string = type;
9904 }
9905 
9906 /*
9907  * "getline(lnum, [end])" function
9908  */
9909     static void
9910 f_getline(argvars, rettv)
9911     typval_T	*argvars;
9912     typval_T	*rettv;
9913 {
9914     linenr_T	lnum;
9915     linenr_T	end;
9916     int		retlist;
9917 
9918     lnum = get_tv_lnum(argvars);
9919     if (argvars[1].v_type == VAR_UNKNOWN)
9920     {
9921 	end = 0;
9922 	retlist = FALSE;
9923     }
9924     else
9925     {
9926 	end = get_tv_lnum(&argvars[1]);
9927 	retlist = TRUE;
9928     }
9929 
9930     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9931 }
9932 
9933 /*
9934  * "getpos(string)" function
9935  */
9936     static void
9937 f_getpos(argvars, rettv)
9938     typval_T	*argvars;
9939     typval_T	*rettv;
9940 {
9941     pos_T	*fp;
9942     list_T	*l;
9943     int		fnum = -1;
9944 
9945     if (rettv_list_alloc(rettv) == OK)
9946     {
9947 	l = rettv->vval.v_list;
9948 	fp = var2fpos(&argvars[0], TRUE, &fnum);
9949 	if (fnum != -1)
9950 	    list_append_number(l, (varnumber_T)fnum);
9951 	else
9952 	    list_append_number(l, (varnumber_T)0);
9953 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->lnum
9954 							    : (varnumber_T)0);
9955 	list_append_number(l, (fp != NULL) ? (varnumber_T)fp->col + 1
9956 							    : (varnumber_T)0);
9957 	list_append_number(l,
9958 #ifdef FEAT_VIRTUALEDIT
9959 				(fp != NULL) ? (varnumber_T)fp->coladd :
9960 #endif
9961 							      (varnumber_T)0);
9962     }
9963     else
9964 	rettv->vval.v_number = FALSE;
9965 }
9966 
9967 /*
9968  * "getqflist()" and "getloclist()" functions
9969  */
9970 /*ARGSUSED*/
9971     static void
9972 f_getqflist(argvars, rettv)
9973     typval_T	*argvars;
9974     typval_T	*rettv;
9975 {
9976 #ifdef FEAT_QUICKFIX
9977     win_T	*wp;
9978 #endif
9979 
9980     rettv->vval.v_number = FALSE;
9981 #ifdef FEAT_QUICKFIX
9982     if (rettv_list_alloc(rettv) == OK)
9983     {
9984 	wp = NULL;
9985 	if (argvars[0].v_type != VAR_UNKNOWN)	/* getloclist() */
9986 	{
9987 	    wp = find_win_by_nr(&argvars[0]);
9988 	    if (wp == NULL)
9989 		return;
9990 	}
9991 
9992 	(void)get_errorlist(wp, rettv->vval.v_list);
9993     }
9994 #endif
9995 }
9996 
9997 /*
9998  * "getreg()" function
9999  */
10000     static void
10001 f_getreg(argvars, rettv)
10002     typval_T	*argvars;
10003     typval_T	*rettv;
10004 {
10005     char_u	*strregname;
10006     int		regname;
10007     int		arg2 = FALSE;
10008     int		error = FALSE;
10009 
10010     if (argvars[0].v_type != VAR_UNKNOWN)
10011     {
10012 	strregname = get_tv_string_chk(&argvars[0]);
10013 	error = strregname == NULL;
10014 	if (argvars[1].v_type != VAR_UNKNOWN)
10015 	    arg2 = get_tv_number_chk(&argvars[1], &error);
10016     }
10017     else
10018 	strregname = vimvars[VV_REG].vv_str;
10019     regname = (strregname == NULL ? '"' : *strregname);
10020     if (regname == 0)
10021 	regname = '"';
10022 
10023     rettv->v_type = VAR_STRING;
10024     rettv->vval.v_string = error ? NULL :
10025 				    get_reg_contents(regname, TRUE, arg2);
10026 }
10027 
10028 /*
10029  * "getregtype()" function
10030  */
10031     static void
10032 f_getregtype(argvars, rettv)
10033     typval_T	*argvars;
10034     typval_T	*rettv;
10035 {
10036     char_u	*strregname;
10037     int		regname;
10038     char_u	buf[NUMBUFLEN + 2];
10039     long	reglen = 0;
10040 
10041     if (argvars[0].v_type != VAR_UNKNOWN)
10042     {
10043 	strregname = get_tv_string_chk(&argvars[0]);
10044 	if (strregname == NULL)	    /* type error; errmsg already given */
10045 	{
10046 	    rettv->v_type = VAR_STRING;
10047 	    rettv->vval.v_string = NULL;
10048 	    return;
10049 	}
10050     }
10051     else
10052 	/* Default to v:register */
10053 	strregname = vimvars[VV_REG].vv_str;
10054 
10055     regname = (strregname == NULL ? '"' : *strregname);
10056     if (regname == 0)
10057 	regname = '"';
10058 
10059     buf[0] = NUL;
10060     buf[1] = NUL;
10061     switch (get_reg_type(regname, &reglen))
10062     {
10063 	case MLINE: buf[0] = 'V'; break;
10064 	case MCHAR: buf[0] = 'v'; break;
10065 #ifdef FEAT_VISUAL
10066 	case MBLOCK:
10067 		buf[0] = Ctrl_V;
10068 		sprintf((char *)buf + 1, "%ld", reglen + 1);
10069 		break;
10070 #endif
10071     }
10072     rettv->v_type = VAR_STRING;
10073     rettv->vval.v_string = vim_strsave(buf);
10074 }
10075 
10076 /*
10077  * "getwinposx()" function
10078  */
10079 /*ARGSUSED*/
10080     static void
10081 f_getwinposx(argvars, rettv)
10082     typval_T	*argvars;
10083     typval_T	*rettv;
10084 {
10085     rettv->vval.v_number = -1;
10086 #ifdef FEAT_GUI
10087     if (gui.in_use)
10088     {
10089 	int	    x, y;
10090 
10091 	if (gui_mch_get_winpos(&x, &y) == OK)
10092 	    rettv->vval.v_number = x;
10093     }
10094 #endif
10095 }
10096 
10097 /*
10098  * "getwinposy()" function
10099  */
10100 /*ARGSUSED*/
10101     static void
10102 f_getwinposy(argvars, rettv)
10103     typval_T	*argvars;
10104     typval_T	*rettv;
10105 {
10106     rettv->vval.v_number = -1;
10107 #ifdef FEAT_GUI
10108     if (gui.in_use)
10109     {
10110 	int	    x, y;
10111 
10112 	if (gui_mch_get_winpos(&x, &y) == OK)
10113 	    rettv->vval.v_number = y;
10114     }
10115 #endif
10116 }
10117 
10118     static win_T *
10119 find_win_by_nr(vp)
10120     typval_T	*vp;
10121 {
10122 #ifdef FEAT_WINDOWS
10123     win_T	*wp;
10124 #endif
10125     int		nr;
10126 
10127     nr = get_tv_number_chk(vp, NULL);
10128 
10129 #ifdef FEAT_WINDOWS
10130     if (nr < 0)
10131 	return NULL;
10132     if (nr == 0)
10133 	return curwin;
10134 
10135     for (wp = firstwin; wp != NULL; wp = wp->w_next)
10136 	if (--nr <= 0)
10137 	    break;
10138     return wp;
10139 #else
10140     if (nr == 0 || nr == 1)
10141 	return curwin;
10142     return NULL;
10143 #endif
10144 }
10145 
10146 /*
10147  * "getwinvar()" function
10148  */
10149     static void
10150 f_getwinvar(argvars, rettv)
10151     typval_T	*argvars;
10152     typval_T	*rettv;
10153 {
10154     win_T	*win, *oldcurwin;
10155     char_u	*varname;
10156     dictitem_T	*v;
10157 
10158     win = find_win_by_nr(&argvars[0]);
10159     varname = get_tv_string_chk(&argvars[1]);
10160     ++emsg_off;
10161 
10162     rettv->v_type = VAR_STRING;
10163     rettv->vval.v_string = NULL;
10164 
10165     if (win != NULL && varname != NULL)
10166     {
10167 	if (*varname == '&')	/* window-local-option */
10168 	{
10169 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
10170 	     * that we can get buffer-local options. */
10171 	    oldcurwin = curwin;
10172 	    curwin = win;
10173 	    curbuf = win->w_buffer;
10174 
10175 	    get_option_tv(&varname, rettv, 1);
10176 
10177 	    /* restore previous notion of curwin */
10178 	    curwin = oldcurwin;
10179 	    curbuf = curwin->w_buffer;
10180 	}
10181 	else
10182 	{
10183 	    if (*varname == NUL)
10184 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
10185 		 * scope prefix before the NUL byte is required by
10186 		 * find_var_in_ht(). */
10187 		varname = (char_u *)"w:" + 2;
10188 	    /* look up the variable */
10189 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
10190 	    if (v != NULL)
10191 		copy_tv(&v->di_tv, rettv);
10192 	}
10193     }
10194 
10195     --emsg_off;
10196 }
10197 
10198 /*
10199  * "glob()" function
10200  */
10201     static void
10202 f_glob(argvars, rettv)
10203     typval_T	*argvars;
10204     typval_T	*rettv;
10205 {
10206     expand_T	xpc;
10207 
10208     ExpandInit(&xpc);
10209     xpc.xp_context = EXPAND_FILES;
10210     rettv->v_type = VAR_STRING;
10211     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
10212 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
10213     ExpandCleanup(&xpc);
10214 }
10215 
10216 /*
10217  * "globpath()" function
10218  */
10219     static void
10220 f_globpath(argvars, rettv)
10221     typval_T	*argvars;
10222     typval_T	*rettv;
10223 {
10224     char_u	buf1[NUMBUFLEN];
10225     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
10226 
10227     rettv->v_type = VAR_STRING;
10228     if (file == NULL)
10229 	rettv->vval.v_string = NULL;
10230     else
10231 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
10232 }
10233 
10234 /*
10235  * "has()" function
10236  */
10237     static void
10238 f_has(argvars, rettv)
10239     typval_T	*argvars;
10240     typval_T	*rettv;
10241 {
10242     int		i;
10243     char_u	*name;
10244     int		n = FALSE;
10245     static char	*(has_list[]) =
10246     {
10247 #ifdef AMIGA
10248 	"amiga",
10249 # ifdef FEAT_ARP
10250 	"arp",
10251 # endif
10252 #endif
10253 #ifdef __BEOS__
10254 	"beos",
10255 #endif
10256 #ifdef MSDOS
10257 # ifdef DJGPP
10258 	"dos32",
10259 # else
10260 	"dos16",
10261 # endif
10262 #endif
10263 #ifdef MACOS
10264 	"mac",
10265 #endif
10266 #if defined(MACOS_X_UNIX)
10267 	"macunix",
10268 #endif
10269 #ifdef OS2
10270 	"os2",
10271 #endif
10272 #ifdef __QNX__
10273 	"qnx",
10274 #endif
10275 #ifdef RISCOS
10276 	"riscos",
10277 #endif
10278 #ifdef UNIX
10279 	"unix",
10280 #endif
10281 #ifdef VMS
10282 	"vms",
10283 #endif
10284 #ifdef WIN16
10285 	"win16",
10286 #endif
10287 #ifdef WIN32
10288 	"win32",
10289 #endif
10290 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
10291 	"win32unix",
10292 #endif
10293 #ifdef WIN64
10294 	"win64",
10295 #endif
10296 #ifdef EBCDIC
10297 	"ebcdic",
10298 #endif
10299 #ifndef CASE_INSENSITIVE_FILENAME
10300 	"fname_case",
10301 #endif
10302 #ifdef FEAT_ARABIC
10303 	"arabic",
10304 #endif
10305 #ifdef FEAT_AUTOCMD
10306 	"autocmd",
10307 #endif
10308 #ifdef FEAT_BEVAL
10309 	"balloon_eval",
10310 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10311 	"balloon_multiline",
10312 # endif
10313 #endif
10314 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10315 	"builtin_terms",
10316 # ifdef ALL_BUILTIN_TCAPS
10317 	"all_builtin_terms",
10318 # endif
10319 #endif
10320 #ifdef FEAT_BYTEOFF
10321 	"byte_offset",
10322 #endif
10323 #ifdef FEAT_CINDENT
10324 	"cindent",
10325 #endif
10326 #ifdef FEAT_CLIENTSERVER
10327 	"clientserver",
10328 #endif
10329 #ifdef FEAT_CLIPBOARD
10330 	"clipboard",
10331 #endif
10332 #ifdef FEAT_CMDL_COMPL
10333 	"cmdline_compl",
10334 #endif
10335 #ifdef FEAT_CMDHIST
10336 	"cmdline_hist",
10337 #endif
10338 #ifdef FEAT_COMMENTS
10339 	"comments",
10340 #endif
10341 #ifdef FEAT_CRYPT
10342 	"cryptv",
10343 #endif
10344 #ifdef FEAT_CSCOPE
10345 	"cscope",
10346 #endif
10347 #ifdef CURSOR_SHAPE
10348 	"cursorshape",
10349 #endif
10350 #ifdef DEBUG
10351 	"debug",
10352 #endif
10353 #ifdef FEAT_CON_DIALOG
10354 	"dialog_con",
10355 #endif
10356 #ifdef FEAT_GUI_DIALOG
10357 	"dialog_gui",
10358 #endif
10359 #ifdef FEAT_DIFF
10360 	"diff",
10361 #endif
10362 #ifdef FEAT_DIGRAPHS
10363 	"digraphs",
10364 #endif
10365 #ifdef FEAT_DND
10366 	"dnd",
10367 #endif
10368 #ifdef FEAT_EMACS_TAGS
10369 	"emacs_tags",
10370 #endif
10371 	"eval",	    /* always present, of course! */
10372 #ifdef FEAT_EX_EXTRA
10373 	"ex_extra",
10374 #endif
10375 #ifdef FEAT_SEARCH_EXTRA
10376 	"extra_search",
10377 #endif
10378 #ifdef FEAT_FKMAP
10379 	"farsi",
10380 #endif
10381 #ifdef FEAT_SEARCHPATH
10382 	"file_in_path",
10383 #endif
10384 #if defined(UNIX) && !defined(USE_SYSTEM)
10385 	"filterpipe",
10386 #endif
10387 #ifdef FEAT_FIND_ID
10388 	"find_in_path",
10389 #endif
10390 #ifdef FEAT_FOLDING
10391 	"folding",
10392 #endif
10393 #ifdef FEAT_FOOTER
10394 	"footer",
10395 #endif
10396 #if !defined(USE_SYSTEM) && defined(UNIX)
10397 	"fork",
10398 #endif
10399 #ifdef FEAT_GETTEXT
10400 	"gettext",
10401 #endif
10402 #ifdef FEAT_GUI
10403 	"gui",
10404 #endif
10405 #ifdef FEAT_GUI_ATHENA
10406 # ifdef FEAT_GUI_NEXTAW
10407 	"gui_neXtaw",
10408 # else
10409 	"gui_athena",
10410 # endif
10411 #endif
10412 #ifdef FEAT_GUI_GTK
10413 	"gui_gtk",
10414 # ifdef HAVE_GTK2
10415 	"gui_gtk2",
10416 # endif
10417 #endif
10418 #ifdef FEAT_GUI_MAC
10419 	"gui_mac",
10420 #endif
10421 #ifdef FEAT_GUI_MOTIF
10422 	"gui_motif",
10423 #endif
10424 #ifdef FEAT_GUI_PHOTON
10425 	"gui_photon",
10426 #endif
10427 #ifdef FEAT_GUI_W16
10428 	"gui_win16",
10429 #endif
10430 #ifdef FEAT_GUI_W32
10431 	"gui_win32",
10432 #endif
10433 #ifdef FEAT_HANGULIN
10434 	"hangul_input",
10435 #endif
10436 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10437 	"iconv",
10438 #endif
10439 #ifdef FEAT_INS_EXPAND
10440 	"insert_expand",
10441 #endif
10442 #ifdef FEAT_JUMPLIST
10443 	"jumplist",
10444 #endif
10445 #ifdef FEAT_KEYMAP
10446 	"keymap",
10447 #endif
10448 #ifdef FEAT_LANGMAP
10449 	"langmap",
10450 #endif
10451 #ifdef FEAT_LIBCALL
10452 	"libcall",
10453 #endif
10454 #ifdef FEAT_LINEBREAK
10455 	"linebreak",
10456 #endif
10457 #ifdef FEAT_LISP
10458 	"lispindent",
10459 #endif
10460 #ifdef FEAT_LISTCMDS
10461 	"listcmds",
10462 #endif
10463 #ifdef FEAT_LOCALMAP
10464 	"localmap",
10465 #endif
10466 #ifdef FEAT_MENU
10467 	"menu",
10468 #endif
10469 #ifdef FEAT_SESSION
10470 	"mksession",
10471 #endif
10472 #ifdef FEAT_MODIFY_FNAME
10473 	"modify_fname",
10474 #endif
10475 #ifdef FEAT_MOUSE
10476 	"mouse",
10477 #endif
10478 #ifdef FEAT_MOUSESHAPE
10479 	"mouseshape",
10480 #endif
10481 #if defined(UNIX) || defined(VMS)
10482 # ifdef FEAT_MOUSE_DEC
10483 	"mouse_dec",
10484 # endif
10485 # ifdef FEAT_MOUSE_GPM
10486 	"mouse_gpm",
10487 # endif
10488 # ifdef FEAT_MOUSE_JSB
10489 	"mouse_jsbterm",
10490 # endif
10491 # ifdef FEAT_MOUSE_NET
10492 	"mouse_netterm",
10493 # endif
10494 # ifdef FEAT_MOUSE_PTERM
10495 	"mouse_pterm",
10496 # endif
10497 # ifdef FEAT_MOUSE_XTERM
10498 	"mouse_xterm",
10499 # endif
10500 #endif
10501 #ifdef FEAT_MBYTE
10502 	"multi_byte",
10503 #endif
10504 #ifdef FEAT_MBYTE_IME
10505 	"multi_byte_ime",
10506 #endif
10507 #ifdef FEAT_MULTI_LANG
10508 	"multi_lang",
10509 #endif
10510 #ifdef FEAT_MZSCHEME
10511 #ifndef DYNAMIC_MZSCHEME
10512 	"mzscheme",
10513 #endif
10514 #endif
10515 #ifdef FEAT_OLE
10516 	"ole",
10517 #endif
10518 #ifdef FEAT_OSFILETYPE
10519 	"osfiletype",
10520 #endif
10521 #ifdef FEAT_PATH_EXTRA
10522 	"path_extra",
10523 #endif
10524 #ifdef FEAT_PERL
10525 #ifndef DYNAMIC_PERL
10526 	"perl",
10527 #endif
10528 #endif
10529 #ifdef FEAT_PYTHON
10530 #ifndef DYNAMIC_PYTHON
10531 	"python",
10532 #endif
10533 #endif
10534 #ifdef FEAT_POSTSCRIPT
10535 	"postscript",
10536 #endif
10537 #ifdef FEAT_PRINTER
10538 	"printer",
10539 #endif
10540 #ifdef FEAT_PROFILE
10541 	"profile",
10542 #endif
10543 #ifdef FEAT_QUICKFIX
10544 	"quickfix",
10545 #endif
10546 #ifdef FEAT_RIGHTLEFT
10547 	"rightleft",
10548 #endif
10549 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10550 	"ruby",
10551 #endif
10552 #ifdef FEAT_SCROLLBIND
10553 	"scrollbind",
10554 #endif
10555 #ifdef FEAT_CMDL_INFO
10556 	"showcmd",
10557 	"cmdline_info",
10558 #endif
10559 #ifdef FEAT_SIGNS
10560 	"signs",
10561 #endif
10562 #ifdef FEAT_SMARTINDENT
10563 	"smartindent",
10564 #endif
10565 #ifdef FEAT_SNIFF
10566 	"sniff",
10567 #endif
10568 #ifdef FEAT_STL_OPT
10569 	"statusline",
10570 #endif
10571 #ifdef FEAT_SUN_WORKSHOP
10572 	"sun_workshop",
10573 #endif
10574 #ifdef FEAT_NETBEANS_INTG
10575 	"netbeans_intg",
10576 #endif
10577 #ifdef FEAT_SYN_HL
10578 	"spell",
10579 #endif
10580 #ifdef FEAT_SYN_HL
10581 	"syntax",
10582 #endif
10583 #if defined(USE_SYSTEM) || !defined(UNIX)
10584 	"system",
10585 #endif
10586 #ifdef FEAT_TAG_BINS
10587 	"tag_binary",
10588 #endif
10589 #ifdef FEAT_TAG_OLDSTATIC
10590 	"tag_old_static",
10591 #endif
10592 #ifdef FEAT_TAG_ANYWHITE
10593 	"tag_any_white",
10594 #endif
10595 #ifdef FEAT_TCL
10596 # ifndef DYNAMIC_TCL
10597 	"tcl",
10598 # endif
10599 #endif
10600 #ifdef TERMINFO
10601 	"terminfo",
10602 #endif
10603 #ifdef FEAT_TERMRESPONSE
10604 	"termresponse",
10605 #endif
10606 #ifdef FEAT_TEXTOBJ
10607 	"textobjects",
10608 #endif
10609 #ifdef HAVE_TGETENT
10610 	"tgetent",
10611 #endif
10612 #ifdef FEAT_TITLE
10613 	"title",
10614 #endif
10615 #ifdef FEAT_TOOLBAR
10616 	"toolbar",
10617 #endif
10618 #ifdef FEAT_USR_CMDS
10619 	"user-commands",    /* was accidentally included in 5.4 */
10620 	"user_commands",
10621 #endif
10622 #ifdef FEAT_VIMINFO
10623 	"viminfo",
10624 #endif
10625 #ifdef FEAT_VERTSPLIT
10626 	"vertsplit",
10627 #endif
10628 #ifdef FEAT_VIRTUALEDIT
10629 	"virtualedit",
10630 #endif
10631 #ifdef FEAT_VISUAL
10632 	"visual",
10633 #endif
10634 #ifdef FEAT_VISUALEXTRA
10635 	"visualextra",
10636 #endif
10637 #ifdef FEAT_VREPLACE
10638 	"vreplace",
10639 #endif
10640 #ifdef FEAT_WILDIGN
10641 	"wildignore",
10642 #endif
10643 #ifdef FEAT_WILDMENU
10644 	"wildmenu",
10645 #endif
10646 #ifdef FEAT_WINDOWS
10647 	"windows",
10648 #endif
10649 #ifdef FEAT_WAK
10650 	"winaltkeys",
10651 #endif
10652 #ifdef FEAT_WRITEBACKUP
10653 	"writebackup",
10654 #endif
10655 #ifdef FEAT_XIM
10656 	"xim",
10657 #endif
10658 #ifdef FEAT_XFONTSET
10659 	"xfontset",
10660 #endif
10661 #ifdef USE_XSMP
10662 	"xsmp",
10663 #endif
10664 #ifdef USE_XSMP_INTERACT
10665 	"xsmp_interact",
10666 #endif
10667 #ifdef FEAT_XCLIPBOARD
10668 	"xterm_clipboard",
10669 #endif
10670 #ifdef FEAT_XTERM_SAVE
10671 	"xterm_save",
10672 #endif
10673 #if defined(UNIX) && defined(FEAT_X11)
10674 	"X11",
10675 #endif
10676 	NULL
10677     };
10678 
10679     name = get_tv_string(&argvars[0]);
10680     for (i = 0; has_list[i] != NULL; ++i)
10681 	if (STRICMP(name, has_list[i]) == 0)
10682 	{
10683 	    n = TRUE;
10684 	    break;
10685 	}
10686 
10687     if (n == FALSE)
10688     {
10689 	if (STRNICMP(name, "patch", 5) == 0)
10690 	    n = has_patch(atoi((char *)name + 5));
10691 	else if (STRICMP(name, "vim_starting") == 0)
10692 	    n = (starting != 0);
10693 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10694 	else if (STRICMP(name, "balloon_multiline") == 0)
10695 	    n = multiline_balloon_available();
10696 #endif
10697 #ifdef DYNAMIC_TCL
10698 	else if (STRICMP(name, "tcl") == 0)
10699 	    n = tcl_enabled(FALSE);
10700 #endif
10701 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10702 	else if (STRICMP(name, "iconv") == 0)
10703 	    n = iconv_enabled(FALSE);
10704 #endif
10705 #ifdef DYNAMIC_MZSCHEME
10706 	else if (STRICMP(name, "mzscheme") == 0)
10707 	    n = mzscheme_enabled(FALSE);
10708 #endif
10709 #ifdef DYNAMIC_RUBY
10710 	else if (STRICMP(name, "ruby") == 0)
10711 	    n = ruby_enabled(FALSE);
10712 #endif
10713 #ifdef DYNAMIC_PYTHON
10714 	else if (STRICMP(name, "python") == 0)
10715 	    n = python_enabled(FALSE);
10716 #endif
10717 #ifdef DYNAMIC_PERL
10718 	else if (STRICMP(name, "perl") == 0)
10719 	    n = perl_enabled(FALSE);
10720 #endif
10721 #ifdef FEAT_GUI
10722 	else if (STRICMP(name, "gui_running") == 0)
10723 	    n = (gui.in_use || gui.starting);
10724 # ifdef FEAT_GUI_W32
10725 	else if (STRICMP(name, "gui_win32s") == 0)
10726 	    n = gui_is_win32s();
10727 # endif
10728 # ifdef FEAT_BROWSE
10729 	else if (STRICMP(name, "browse") == 0)
10730 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10731 # endif
10732 #endif
10733 #ifdef FEAT_SYN_HL
10734 	else if (STRICMP(name, "syntax_items") == 0)
10735 	    n = syntax_present(curbuf);
10736 #endif
10737 #if defined(WIN3264)
10738 	else if (STRICMP(name, "win95") == 0)
10739 	    n = mch_windows95();
10740 #endif
10741 #ifdef FEAT_NETBEANS_INTG
10742 	else if (STRICMP(name, "netbeans_enabled") == 0)
10743 	    n = usingNetbeans;
10744 #endif
10745     }
10746 
10747     rettv->vval.v_number = n;
10748 }
10749 
10750 /*
10751  * "has_key()" function
10752  */
10753     static void
10754 f_has_key(argvars, rettv)
10755     typval_T	*argvars;
10756     typval_T	*rettv;
10757 {
10758     rettv->vval.v_number = 0;
10759     if (argvars[0].v_type != VAR_DICT)
10760     {
10761 	EMSG(_(e_dictreq));
10762 	return;
10763     }
10764     if (argvars[0].vval.v_dict == NULL)
10765 	return;
10766 
10767     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10768 				      get_tv_string(&argvars[1]), -1) != NULL;
10769 }
10770 
10771 /*
10772  * "hasmapto()" function
10773  */
10774     static void
10775 f_hasmapto(argvars, rettv)
10776     typval_T	*argvars;
10777     typval_T	*rettv;
10778 {
10779     char_u	*name;
10780     char_u	*mode;
10781     char_u	buf[NUMBUFLEN];
10782 
10783     name = get_tv_string(&argvars[0]);
10784     if (argvars[1].v_type == VAR_UNKNOWN)
10785 	mode = (char_u *)"nvo";
10786     else
10787 	mode = get_tv_string_buf(&argvars[1], buf);
10788 
10789     if (map_to_exists(name, mode))
10790 	rettv->vval.v_number = TRUE;
10791     else
10792 	rettv->vval.v_number = FALSE;
10793 }
10794 
10795 /*
10796  * "histadd()" function
10797  */
10798 /*ARGSUSED*/
10799     static void
10800 f_histadd(argvars, rettv)
10801     typval_T	*argvars;
10802     typval_T	*rettv;
10803 {
10804 #ifdef FEAT_CMDHIST
10805     int		histype;
10806     char_u	*str;
10807     char_u	buf[NUMBUFLEN];
10808 #endif
10809 
10810     rettv->vval.v_number = FALSE;
10811     if (check_restricted() || check_secure())
10812 	return;
10813 #ifdef FEAT_CMDHIST
10814     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10815     histype = str != NULL ? get_histtype(str) : -1;
10816     if (histype >= 0)
10817     {
10818 	str = get_tv_string_buf(&argvars[1], buf);
10819 	if (*str != NUL)
10820 	{
10821 	    add_to_history(histype, str, FALSE, NUL);
10822 	    rettv->vval.v_number = TRUE;
10823 	    return;
10824 	}
10825     }
10826 #endif
10827 }
10828 
10829 /*
10830  * "histdel()" function
10831  */
10832 /*ARGSUSED*/
10833     static void
10834 f_histdel(argvars, rettv)
10835     typval_T	*argvars;
10836     typval_T	*rettv;
10837 {
10838 #ifdef FEAT_CMDHIST
10839     int		n;
10840     char_u	buf[NUMBUFLEN];
10841     char_u	*str;
10842 
10843     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10844     if (str == NULL)
10845 	n = 0;
10846     else if (argvars[1].v_type == VAR_UNKNOWN)
10847 	/* only one argument: clear entire history */
10848 	n = clr_history(get_histtype(str));
10849     else if (argvars[1].v_type == VAR_NUMBER)
10850 	/* index given: remove that entry */
10851 	n = del_history_idx(get_histtype(str),
10852 					  (int)get_tv_number(&argvars[1]));
10853     else
10854 	/* string given: remove all matching entries */
10855 	n = del_history_entry(get_histtype(str),
10856 				      get_tv_string_buf(&argvars[1], buf));
10857     rettv->vval.v_number = n;
10858 #else
10859     rettv->vval.v_number = 0;
10860 #endif
10861 }
10862 
10863 /*
10864  * "histget()" function
10865  */
10866 /*ARGSUSED*/
10867     static void
10868 f_histget(argvars, rettv)
10869     typval_T	*argvars;
10870     typval_T	*rettv;
10871 {
10872 #ifdef FEAT_CMDHIST
10873     int		type;
10874     int		idx;
10875     char_u	*str;
10876 
10877     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10878     if (str == NULL)
10879 	rettv->vval.v_string = NULL;
10880     else
10881     {
10882 	type = get_histtype(str);
10883 	if (argvars[1].v_type == VAR_UNKNOWN)
10884 	    idx = get_history_idx(type);
10885 	else
10886 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10887 						    /* -1 on type error */
10888 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10889     }
10890 #else
10891     rettv->vval.v_string = NULL;
10892 #endif
10893     rettv->v_type = VAR_STRING;
10894 }
10895 
10896 /*
10897  * "histnr()" function
10898  */
10899 /*ARGSUSED*/
10900     static void
10901 f_histnr(argvars, rettv)
10902     typval_T	*argvars;
10903     typval_T	*rettv;
10904 {
10905     int		i;
10906 
10907 #ifdef FEAT_CMDHIST
10908     char_u	*history = get_tv_string_chk(&argvars[0]);
10909 
10910     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10911     if (i >= HIST_CMD && i < HIST_COUNT)
10912 	i = get_history_idx(i);
10913     else
10914 #endif
10915 	i = -1;
10916     rettv->vval.v_number = i;
10917 }
10918 
10919 /*
10920  * "highlightID(name)" function
10921  */
10922     static void
10923 f_hlID(argvars, rettv)
10924     typval_T	*argvars;
10925     typval_T	*rettv;
10926 {
10927     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10928 }
10929 
10930 /*
10931  * "highlight_exists()" function
10932  */
10933     static void
10934 f_hlexists(argvars, rettv)
10935     typval_T	*argvars;
10936     typval_T	*rettv;
10937 {
10938     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10939 }
10940 
10941 /*
10942  * "hostname()" function
10943  */
10944 /*ARGSUSED*/
10945     static void
10946 f_hostname(argvars, rettv)
10947     typval_T	*argvars;
10948     typval_T	*rettv;
10949 {
10950     char_u hostname[256];
10951 
10952     mch_get_host_name(hostname, 256);
10953     rettv->v_type = VAR_STRING;
10954     rettv->vval.v_string = vim_strsave(hostname);
10955 }
10956 
10957 /*
10958  * iconv() function
10959  */
10960 /*ARGSUSED*/
10961     static void
10962 f_iconv(argvars, rettv)
10963     typval_T	*argvars;
10964     typval_T	*rettv;
10965 {
10966 #ifdef FEAT_MBYTE
10967     char_u	buf1[NUMBUFLEN];
10968     char_u	buf2[NUMBUFLEN];
10969     char_u	*from, *to, *str;
10970     vimconv_T	vimconv;
10971 #endif
10972 
10973     rettv->v_type = VAR_STRING;
10974     rettv->vval.v_string = NULL;
10975 
10976 #ifdef FEAT_MBYTE
10977     str = get_tv_string(&argvars[0]);
10978     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10979     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10980     vimconv.vc_type = CONV_NONE;
10981     convert_setup(&vimconv, from, to);
10982 
10983     /* If the encodings are equal, no conversion needed. */
10984     if (vimconv.vc_type == CONV_NONE)
10985 	rettv->vval.v_string = vim_strsave(str);
10986     else
10987 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10988 
10989     convert_setup(&vimconv, NULL, NULL);
10990     vim_free(from);
10991     vim_free(to);
10992 #endif
10993 }
10994 
10995 /*
10996  * "indent()" function
10997  */
10998     static void
10999 f_indent(argvars, rettv)
11000     typval_T	*argvars;
11001     typval_T	*rettv;
11002 {
11003     linenr_T	lnum;
11004 
11005     lnum = get_tv_lnum(argvars);
11006     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11007 	rettv->vval.v_number = get_indent_lnum(lnum);
11008     else
11009 	rettv->vval.v_number = -1;
11010 }
11011 
11012 /*
11013  * "index()" function
11014  */
11015     static void
11016 f_index(argvars, rettv)
11017     typval_T	*argvars;
11018     typval_T	*rettv;
11019 {
11020     list_T	*l;
11021     listitem_T	*item;
11022     long	idx = 0;
11023     int		ic = FALSE;
11024 
11025     rettv->vval.v_number = -1;
11026     if (argvars[0].v_type != VAR_LIST)
11027     {
11028 	EMSG(_(e_listreq));
11029 	return;
11030     }
11031     l = argvars[0].vval.v_list;
11032     if (l != NULL)
11033     {
11034 	item = l->lv_first;
11035 	if (argvars[2].v_type != VAR_UNKNOWN)
11036 	{
11037 	    int		error = FALSE;
11038 
11039 	    /* Start at specified item.  Use the cached index that list_find()
11040 	     * sets, so that a negative number also works. */
11041 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
11042 	    idx = l->lv_idx;
11043 	    if (argvars[3].v_type != VAR_UNKNOWN)
11044 		ic = get_tv_number_chk(&argvars[3], &error);
11045 	    if (error)
11046 		item = NULL;
11047 	}
11048 
11049 	for ( ; item != NULL; item = item->li_next, ++idx)
11050 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
11051 	    {
11052 		rettv->vval.v_number = idx;
11053 		break;
11054 	    }
11055     }
11056 }
11057 
11058 static int inputsecret_flag = 0;
11059 
11060 /*
11061  * "input()" function
11062  *     Also handles inputsecret() when inputsecret is set.
11063  */
11064     static void
11065 f_input(argvars, rettv)
11066     typval_T	*argvars;
11067     typval_T	*rettv;
11068 {
11069     char_u	*prompt = get_tv_string_chk(&argvars[0]);
11070     char_u	*p = NULL;
11071     int		c;
11072     char_u	buf[NUMBUFLEN];
11073     int		cmd_silent_save = cmd_silent;
11074     char_u	*defstr = (char_u *)"";
11075     int		xp_type = EXPAND_NOTHING;
11076     char_u	*xp_arg = NULL;
11077 
11078     rettv->v_type = VAR_STRING;
11079 
11080 #ifdef NO_CONSOLE_INPUT
11081     /* While starting up, there is no place to enter text. */
11082     if (no_console_input())
11083     {
11084 	rettv->vval.v_string = NULL;
11085 	return;
11086     }
11087 #endif
11088 
11089     cmd_silent = FALSE;		/* Want to see the prompt. */
11090     if (prompt != NULL)
11091     {
11092 	/* Only the part of the message after the last NL is considered as
11093 	 * prompt for the command line */
11094 	p = vim_strrchr(prompt, '\n');
11095 	if (p == NULL)
11096 	    p = prompt;
11097 	else
11098 	{
11099 	    ++p;
11100 	    c = *p;
11101 	    *p = NUL;
11102 	    msg_start();
11103 	    msg_clr_eos();
11104 	    msg_puts_attr(prompt, echo_attr);
11105 	    msg_didout = FALSE;
11106 	    msg_starthere();
11107 	    *p = c;
11108 	}
11109 	cmdline_row = msg_row;
11110 
11111 	if (argvars[1].v_type != VAR_UNKNOWN)
11112 	{
11113 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
11114 	    if (defstr != NULL)
11115 		stuffReadbuffSpec(defstr);
11116 
11117 	    if (argvars[2].v_type != VAR_UNKNOWN)
11118 	    {
11119 		char_u	*xp_name;
11120 		int		xp_namelen;
11121 		long	argt;
11122 
11123 		rettv->vval.v_string = NULL;
11124 
11125 		xp_name = get_tv_string_buf_chk(&argvars[2], buf);
11126 		if (xp_name == NULL)
11127 		    return;
11128 
11129 		xp_namelen = STRLEN(xp_name);
11130 
11131 		if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
11132 							     &xp_arg) == FAIL)
11133 		    return;
11134 	    }
11135 	}
11136 
11137 	if (defstr != NULL)
11138 	    rettv->vval.v_string =
11139 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr,
11140 				  xp_type, xp_arg);
11141 
11142 	vim_free(xp_arg);
11143 
11144 	/* since the user typed this, no need to wait for return */
11145 	need_wait_return = FALSE;
11146 	msg_didout = FALSE;
11147     }
11148     cmd_silent = cmd_silent_save;
11149 }
11150 
11151 /*
11152  * "inputdialog()" function
11153  */
11154     static void
11155 f_inputdialog(argvars, rettv)
11156     typval_T	*argvars;
11157     typval_T	*rettv;
11158 {
11159 #if defined(FEAT_GUI_TEXTDIALOG)
11160     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
11161     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
11162     {
11163 	char_u	*message;
11164 	char_u	buf[NUMBUFLEN];
11165 	char_u	*defstr = (char_u *)"";
11166 
11167 	message = get_tv_string_chk(&argvars[0]);
11168 	if (argvars[1].v_type != VAR_UNKNOWN
11169 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
11170 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
11171 	else
11172 	    IObuff[0] = NUL;
11173 	if (message != NULL && defstr != NULL
11174 		&& do_dialog(VIM_QUESTION, NULL, message,
11175 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
11176 	    rettv->vval.v_string = vim_strsave(IObuff);
11177 	else
11178 	{
11179 	    if (message != NULL && defstr != NULL
11180 					&& argvars[1].v_type != VAR_UNKNOWN
11181 					&& argvars[2].v_type != VAR_UNKNOWN)
11182 		rettv->vval.v_string = vim_strsave(
11183 				      get_tv_string_buf(&argvars[2], buf));
11184 	    else
11185 		rettv->vval.v_string = NULL;
11186 	}
11187 	rettv->v_type = VAR_STRING;
11188     }
11189     else
11190 #endif
11191 	f_input(argvars, rettv);
11192 }
11193 
11194 /*
11195  * "inputlist()" function
11196  */
11197     static void
11198 f_inputlist(argvars, rettv)
11199     typval_T	*argvars;
11200     typval_T	*rettv;
11201 {
11202     listitem_T	*li;
11203     int		selected;
11204     int		mouse_used;
11205 
11206     rettv->vval.v_number = 0;
11207 #ifdef NO_CONSOLE_INPUT
11208     /* While starting up, there is no place to enter text. */
11209     if (no_console_input())
11210 	return;
11211 #endif
11212     if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
11213     {
11214 	EMSG2(_(e_listarg), "inputlist()");
11215 	return;
11216     }
11217 
11218     msg_start();
11219     lines_left = Rows;	/* avoid more prompt */
11220     msg_scroll = TRUE;
11221     msg_clr_eos();
11222 
11223     for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
11224     {
11225 	msg_puts(get_tv_string(&li->li_tv));
11226 	msg_putchar('\n');
11227     }
11228 
11229     /* Ask for choice. */
11230     selected = prompt_for_number(&mouse_used);
11231     if (mouse_used)
11232 	selected -= lines_left;
11233 
11234     rettv->vval.v_number = selected;
11235 }
11236 
11237 
11238 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
11239 
11240 /*
11241  * "inputrestore()" function
11242  */
11243 /*ARGSUSED*/
11244     static void
11245 f_inputrestore(argvars, rettv)
11246     typval_T	*argvars;
11247     typval_T	*rettv;
11248 {
11249     if (ga_userinput.ga_len > 0)
11250     {
11251 	--ga_userinput.ga_len;
11252 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
11253 						       + ga_userinput.ga_len);
11254 	rettv->vval.v_number = 0; /* OK */
11255     }
11256     else if (p_verbose > 1)
11257     {
11258 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
11259 	rettv->vval.v_number = 1; /* Failed */
11260     }
11261 }
11262 
11263 /*
11264  * "inputsave()" function
11265  */
11266 /*ARGSUSED*/
11267     static void
11268 f_inputsave(argvars, rettv)
11269     typval_T	*argvars;
11270     typval_T	*rettv;
11271 {
11272     /* Add an entry to the stack of typehead storage. */
11273     if (ga_grow(&ga_userinput, 1) == OK)
11274     {
11275 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
11276 						       + ga_userinput.ga_len);
11277 	++ga_userinput.ga_len;
11278 	rettv->vval.v_number = 0; /* OK */
11279     }
11280     else
11281 	rettv->vval.v_number = 1; /* Failed */
11282 }
11283 
11284 /*
11285  * "inputsecret()" function
11286  */
11287     static void
11288 f_inputsecret(argvars, rettv)
11289     typval_T	*argvars;
11290     typval_T	*rettv;
11291 {
11292     ++cmdline_star;
11293     ++inputsecret_flag;
11294     f_input(argvars, rettv);
11295     --cmdline_star;
11296     --inputsecret_flag;
11297 }
11298 
11299 /*
11300  * "insert()" function
11301  */
11302     static void
11303 f_insert(argvars, rettv)
11304     typval_T	*argvars;
11305     typval_T	*rettv;
11306 {
11307     long	before = 0;
11308     listitem_T	*item;
11309     list_T	*l;
11310     int		error = FALSE;
11311 
11312     rettv->vval.v_number = 0;
11313     if (argvars[0].v_type != VAR_LIST)
11314 	EMSG2(_(e_listarg), "insert()");
11315     else if ((l = argvars[0].vval.v_list) != NULL
11316 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
11317     {
11318 	if (argvars[2].v_type != VAR_UNKNOWN)
11319 	    before = get_tv_number_chk(&argvars[2], &error);
11320 	if (error)
11321 	    return;		/* type error; errmsg already given */
11322 
11323 	if (before == l->lv_len)
11324 	    item = NULL;
11325 	else
11326 	{
11327 	    item = list_find(l, before);
11328 	    if (item == NULL)
11329 	    {
11330 		EMSGN(_(e_listidx), before);
11331 		l = NULL;
11332 	    }
11333 	}
11334 	if (l != NULL)
11335 	{
11336 	    list_insert_tv(l, &argvars[1], item);
11337 	    copy_tv(&argvars[0], rettv);
11338 	}
11339     }
11340 }
11341 
11342 /*
11343  * "isdirectory()" function
11344  */
11345     static void
11346 f_isdirectory(argvars, rettv)
11347     typval_T	*argvars;
11348     typval_T	*rettv;
11349 {
11350     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
11351 }
11352 
11353 /*
11354  * "islocked()" function
11355  */
11356     static void
11357 f_islocked(argvars, rettv)
11358     typval_T	*argvars;
11359     typval_T	*rettv;
11360 {
11361     lval_T	lv;
11362     char_u	*end;
11363     dictitem_T	*di;
11364 
11365     rettv->vval.v_number = -1;
11366     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
11367 							     FNE_CHECK_START);
11368     if (end != NULL && lv.ll_name != NULL)
11369     {
11370 	if (*end != NUL)
11371 	    EMSG(_(e_trailing));
11372 	else
11373 	{
11374 	    if (lv.ll_tv == NULL)
11375 	    {
11376 		if (check_changedtick(lv.ll_name))
11377 		    rettv->vval.v_number = 1;	    /* always locked */
11378 		else
11379 		{
11380 		    di = find_var(lv.ll_name, NULL);
11381 		    if (di != NULL)
11382 		    {
11383 			/* Consider a variable locked when:
11384 			 * 1. the variable itself is locked
11385 			 * 2. the value of the variable is locked.
11386 			 * 3. the List or Dict value is locked.
11387 			 */
11388 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11389 						  || tv_islocked(&di->di_tv));
11390 		    }
11391 		}
11392 	    }
11393 	    else if (lv.ll_range)
11394 		EMSG(_("E745: Range not allowed"));
11395 	    else if (lv.ll_newkey != NULL)
11396 		EMSG2(_(e_dictkey), lv.ll_newkey);
11397 	    else if (lv.ll_list != NULL)
11398 		/* List item. */
11399 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11400 	    else
11401 		/* Dictionary item. */
11402 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11403 	}
11404     }
11405 
11406     clear_lval(&lv);
11407 }
11408 
11409 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11410 
11411 /*
11412  * Turn a dict into a list:
11413  * "what" == 0: list of keys
11414  * "what" == 1: list of values
11415  * "what" == 2: list of items
11416  */
11417     static void
11418 dict_list(argvars, rettv, what)
11419     typval_T	*argvars;
11420     typval_T	*rettv;
11421     int		what;
11422 {
11423     list_T	*l2;
11424     dictitem_T	*di;
11425     hashitem_T	*hi;
11426     listitem_T	*li;
11427     listitem_T	*li2;
11428     dict_T	*d;
11429     int		todo;
11430 
11431     rettv->vval.v_number = 0;
11432     if (argvars[0].v_type != VAR_DICT)
11433     {
11434 	EMSG(_(e_dictreq));
11435 	return;
11436     }
11437     if ((d = argvars[0].vval.v_dict) == NULL)
11438 	return;
11439 
11440     if (rettv_list_alloc(rettv) == FAIL)
11441 	return;
11442 
11443     todo = d->dv_hashtab.ht_used;
11444     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11445     {
11446 	if (!HASHITEM_EMPTY(hi))
11447 	{
11448 	    --todo;
11449 	    di = HI2DI(hi);
11450 
11451 	    li = listitem_alloc();
11452 	    if (li == NULL)
11453 		break;
11454 	    list_append(rettv->vval.v_list, li);
11455 
11456 	    if (what == 0)
11457 	    {
11458 		/* keys() */
11459 		li->li_tv.v_type = VAR_STRING;
11460 		li->li_tv.v_lock = 0;
11461 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11462 	    }
11463 	    else if (what == 1)
11464 	    {
11465 		/* values() */
11466 		copy_tv(&di->di_tv, &li->li_tv);
11467 	    }
11468 	    else
11469 	    {
11470 		/* items() */
11471 		l2 = list_alloc();
11472 		li->li_tv.v_type = VAR_LIST;
11473 		li->li_tv.v_lock = 0;
11474 		li->li_tv.vval.v_list = l2;
11475 		if (l2 == NULL)
11476 		    break;
11477 		++l2->lv_refcount;
11478 
11479 		li2 = listitem_alloc();
11480 		if (li2 == NULL)
11481 		    break;
11482 		list_append(l2, li2);
11483 		li2->li_tv.v_type = VAR_STRING;
11484 		li2->li_tv.v_lock = 0;
11485 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11486 
11487 		li2 = listitem_alloc();
11488 		if (li2 == NULL)
11489 		    break;
11490 		list_append(l2, li2);
11491 		copy_tv(&di->di_tv, &li2->li_tv);
11492 	    }
11493 	}
11494     }
11495 }
11496 
11497 /*
11498  * "items(dict)" function
11499  */
11500     static void
11501 f_items(argvars, rettv)
11502     typval_T	*argvars;
11503     typval_T	*rettv;
11504 {
11505     dict_list(argvars, rettv, 2);
11506 }
11507 
11508 /*
11509  * "join()" function
11510  */
11511     static void
11512 f_join(argvars, rettv)
11513     typval_T	*argvars;
11514     typval_T	*rettv;
11515 {
11516     garray_T	ga;
11517     char_u	*sep;
11518 
11519     rettv->vval.v_number = 0;
11520     if (argvars[0].v_type != VAR_LIST)
11521     {
11522 	EMSG(_(e_listreq));
11523 	return;
11524     }
11525     if (argvars[0].vval.v_list == NULL)
11526 	return;
11527     if (argvars[1].v_type == VAR_UNKNOWN)
11528 	sep = (char_u *)" ";
11529     else
11530 	sep = get_tv_string_chk(&argvars[1]);
11531 
11532     rettv->v_type = VAR_STRING;
11533 
11534     if (sep != NULL)
11535     {
11536 	ga_init2(&ga, (int)sizeof(char), 80);
11537 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE, 0);
11538 	ga_append(&ga, NUL);
11539 	rettv->vval.v_string = (char_u *)ga.ga_data;
11540     }
11541     else
11542 	rettv->vval.v_string = NULL;
11543 }
11544 
11545 /*
11546  * "keys()" function
11547  */
11548     static void
11549 f_keys(argvars, rettv)
11550     typval_T	*argvars;
11551     typval_T	*rettv;
11552 {
11553     dict_list(argvars, rettv, 0);
11554 }
11555 
11556 /*
11557  * "last_buffer_nr()" function.
11558  */
11559 /*ARGSUSED*/
11560     static void
11561 f_last_buffer_nr(argvars, rettv)
11562     typval_T	*argvars;
11563     typval_T	*rettv;
11564 {
11565     int		n = 0;
11566     buf_T	*buf;
11567 
11568     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11569 	if (n < buf->b_fnum)
11570 	    n = buf->b_fnum;
11571 
11572     rettv->vval.v_number = n;
11573 }
11574 
11575 /*
11576  * "len()" function
11577  */
11578     static void
11579 f_len(argvars, rettv)
11580     typval_T	*argvars;
11581     typval_T	*rettv;
11582 {
11583     switch (argvars[0].v_type)
11584     {
11585 	case VAR_STRING:
11586 	case VAR_NUMBER:
11587 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11588 					       get_tv_string(&argvars[0]));
11589 	    break;
11590 	case VAR_LIST:
11591 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11592 	    break;
11593 	case VAR_DICT:
11594 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11595 	    break;
11596 	default:
11597 	    EMSG(_("E701: Invalid type for len()"));
11598 	    break;
11599     }
11600 }
11601 
11602 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11603 
11604     static void
11605 libcall_common(argvars, rettv, type)
11606     typval_T	*argvars;
11607     typval_T	*rettv;
11608     int		type;
11609 {
11610 #ifdef FEAT_LIBCALL
11611     char_u		*string_in;
11612     char_u		**string_result;
11613     int			nr_result;
11614 #endif
11615 
11616     rettv->v_type = type;
11617     if (type == VAR_NUMBER)
11618 	rettv->vval.v_number = 0;
11619     else
11620 	rettv->vval.v_string = NULL;
11621 
11622     if (check_restricted() || check_secure())
11623 	return;
11624 
11625 #ifdef FEAT_LIBCALL
11626     /* The first two args must be strings, otherwise its meaningless */
11627     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11628     {
11629 	string_in = NULL;
11630 	if (argvars[2].v_type == VAR_STRING)
11631 	    string_in = argvars[2].vval.v_string;
11632 	if (type == VAR_NUMBER)
11633 	    string_result = NULL;
11634 	else
11635 	    string_result = &rettv->vval.v_string;
11636 	if (mch_libcall(argvars[0].vval.v_string,
11637 			     argvars[1].vval.v_string,
11638 			     string_in,
11639 			     argvars[2].vval.v_number,
11640 			     string_result,
11641 			     &nr_result) == OK
11642 		&& type == VAR_NUMBER)
11643 	    rettv->vval.v_number = nr_result;
11644     }
11645 #endif
11646 }
11647 
11648 /*
11649  * "libcall()" function
11650  */
11651     static void
11652 f_libcall(argvars, rettv)
11653     typval_T	*argvars;
11654     typval_T	*rettv;
11655 {
11656     libcall_common(argvars, rettv, VAR_STRING);
11657 }
11658 
11659 /*
11660  * "libcallnr()" function
11661  */
11662     static void
11663 f_libcallnr(argvars, rettv)
11664     typval_T	*argvars;
11665     typval_T	*rettv;
11666 {
11667     libcall_common(argvars, rettv, VAR_NUMBER);
11668 }
11669 
11670 /*
11671  * "line(string)" function
11672  */
11673     static void
11674 f_line(argvars, rettv)
11675     typval_T	*argvars;
11676     typval_T	*rettv;
11677 {
11678     linenr_T	lnum = 0;
11679     pos_T	*fp;
11680     int		fnum;
11681 
11682     fp = var2fpos(&argvars[0], TRUE, &fnum);
11683     if (fp != NULL)
11684 	lnum = fp->lnum;
11685     rettv->vval.v_number = lnum;
11686 }
11687 
11688 /*
11689  * "line2byte(lnum)" function
11690  */
11691 /*ARGSUSED*/
11692     static void
11693 f_line2byte(argvars, rettv)
11694     typval_T	*argvars;
11695     typval_T	*rettv;
11696 {
11697 #ifndef FEAT_BYTEOFF
11698     rettv->vval.v_number = -1;
11699 #else
11700     linenr_T	lnum;
11701 
11702     lnum = get_tv_lnum(argvars);
11703     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11704 	rettv->vval.v_number = -1;
11705     else
11706 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11707     if (rettv->vval.v_number >= 0)
11708 	++rettv->vval.v_number;
11709 #endif
11710 }
11711 
11712 /*
11713  * "lispindent(lnum)" function
11714  */
11715     static void
11716 f_lispindent(argvars, rettv)
11717     typval_T	*argvars;
11718     typval_T	*rettv;
11719 {
11720 #ifdef FEAT_LISP
11721     pos_T	pos;
11722     linenr_T	lnum;
11723 
11724     pos = curwin->w_cursor;
11725     lnum = get_tv_lnum(argvars);
11726     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11727     {
11728 	curwin->w_cursor.lnum = lnum;
11729 	rettv->vval.v_number = get_lisp_indent();
11730 	curwin->w_cursor = pos;
11731     }
11732     else
11733 #endif
11734 	rettv->vval.v_number = -1;
11735 }
11736 
11737 /*
11738  * "localtime()" function
11739  */
11740 /*ARGSUSED*/
11741     static void
11742 f_localtime(argvars, rettv)
11743     typval_T	*argvars;
11744     typval_T	*rettv;
11745 {
11746     rettv->vval.v_number = (varnumber_T)time(NULL);
11747 }
11748 
11749 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11750 
11751     static void
11752 get_maparg(argvars, rettv, exact)
11753     typval_T	*argvars;
11754     typval_T	*rettv;
11755     int		exact;
11756 {
11757     char_u	*keys;
11758     char_u	*which;
11759     char_u	buf[NUMBUFLEN];
11760     char_u	*keys_buf = NULL;
11761     char_u	*rhs;
11762     int		mode;
11763     garray_T	ga;
11764 
11765     /* return empty string for failure */
11766     rettv->v_type = VAR_STRING;
11767     rettv->vval.v_string = NULL;
11768 
11769     keys = get_tv_string(&argvars[0]);
11770     if (*keys == NUL)
11771 	return;
11772 
11773     if (argvars[1].v_type != VAR_UNKNOWN)
11774 	which = get_tv_string_buf_chk(&argvars[1], buf);
11775     else
11776 	which = (char_u *)"";
11777     if (which == NULL)
11778 	return;
11779 
11780     mode = get_map_mode(&which, 0);
11781 
11782     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11783     rhs = check_map(keys, mode, exact, FALSE);
11784     vim_free(keys_buf);
11785     if (rhs != NULL)
11786     {
11787 	ga_init(&ga);
11788 	ga.ga_itemsize = 1;
11789 	ga.ga_growsize = 40;
11790 
11791 	while (*rhs != NUL)
11792 	    ga_concat(&ga, str2special(&rhs, FALSE));
11793 
11794 	ga_append(&ga, NUL);
11795 	rettv->vval.v_string = (char_u *)ga.ga_data;
11796     }
11797 }
11798 
11799 /*
11800  * "map()" function
11801  */
11802     static void
11803 f_map(argvars, rettv)
11804     typval_T	*argvars;
11805     typval_T	*rettv;
11806 {
11807     filter_map(argvars, rettv, TRUE);
11808 }
11809 
11810 /*
11811  * "maparg()" function
11812  */
11813     static void
11814 f_maparg(argvars, rettv)
11815     typval_T	*argvars;
11816     typval_T	*rettv;
11817 {
11818     get_maparg(argvars, rettv, TRUE);
11819 }
11820 
11821 /*
11822  * "mapcheck()" function
11823  */
11824     static void
11825 f_mapcheck(argvars, rettv)
11826     typval_T	*argvars;
11827     typval_T	*rettv;
11828 {
11829     get_maparg(argvars, rettv, FALSE);
11830 }
11831 
11832 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11833 
11834     static void
11835 find_some_match(argvars, rettv, type)
11836     typval_T	*argvars;
11837     typval_T	*rettv;
11838     int		type;
11839 {
11840     char_u	*str = NULL;
11841     char_u	*expr = NULL;
11842     char_u	*pat;
11843     regmatch_T	regmatch;
11844     char_u	patbuf[NUMBUFLEN];
11845     char_u	strbuf[NUMBUFLEN];
11846     char_u	*save_cpo;
11847     long	start = 0;
11848     long	nth = 1;
11849     colnr_T	startcol = 0;
11850     int		match = 0;
11851     list_T	*l = NULL;
11852     listitem_T	*li = NULL;
11853     long	idx = 0;
11854     char_u	*tofree = NULL;
11855 
11856     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11857     save_cpo = p_cpo;
11858     p_cpo = (char_u *)"";
11859 
11860     rettv->vval.v_number = -1;
11861     if (type == 3)
11862     {
11863 	/* return empty list when there are no matches */
11864 	if (rettv_list_alloc(rettv) == FAIL)
11865 	    goto theend;
11866     }
11867     else if (type == 2)
11868     {
11869 	rettv->v_type = VAR_STRING;
11870 	rettv->vval.v_string = NULL;
11871     }
11872 
11873     if (argvars[0].v_type == VAR_LIST)
11874     {
11875 	if ((l = argvars[0].vval.v_list) == NULL)
11876 	    goto theend;
11877 	li = l->lv_first;
11878     }
11879     else
11880 	expr = str = get_tv_string(&argvars[0]);
11881 
11882     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11883     if (pat == NULL)
11884 	goto theend;
11885 
11886     if (argvars[2].v_type != VAR_UNKNOWN)
11887     {
11888 	int	    error = FALSE;
11889 
11890 	start = get_tv_number_chk(&argvars[2], &error);
11891 	if (error)
11892 	    goto theend;
11893 	if (l != NULL)
11894 	{
11895 	    li = list_find(l, start);
11896 	    if (li == NULL)
11897 		goto theend;
11898 	    idx = l->lv_idx;	/* use the cached index */
11899 	}
11900 	else
11901 	{
11902 	    if (start < 0)
11903 		start = 0;
11904 	    if (start > (long)STRLEN(str))
11905 		goto theend;
11906 	    /* When "count" argument is there ignore matches before "start",
11907 	     * otherwise skip part of the string.  Differs when pattern is "^"
11908 	     * or "\<". */
11909 	    if (argvars[3].v_type != VAR_UNKNOWN)
11910 		startcol = start;
11911 	    else
11912 		str += start;
11913 	}
11914 
11915 	if (argvars[3].v_type != VAR_UNKNOWN)
11916 	    nth = get_tv_number_chk(&argvars[3], &error);
11917 	if (error)
11918 	    goto theend;
11919     }
11920 
11921     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11922     if (regmatch.regprog != NULL)
11923     {
11924 	regmatch.rm_ic = p_ic;
11925 
11926 	for (;;)
11927 	{
11928 	    if (l != NULL)
11929 	    {
11930 		if (li == NULL)
11931 		{
11932 		    match = FALSE;
11933 		    break;
11934 		}
11935 		vim_free(tofree);
11936 		str = echo_string(&li->li_tv, &tofree, strbuf, 0);
11937 		if (str == NULL)
11938 		    break;
11939 	    }
11940 
11941 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)startcol);
11942 
11943 	    if (match && --nth <= 0)
11944 		break;
11945 	    if (l == NULL && !match)
11946 		break;
11947 
11948 	    /* Advance to just after the match. */
11949 	    if (l != NULL)
11950 	    {
11951 		li = li->li_next;
11952 		++idx;
11953 	    }
11954 	    else
11955 	    {
11956 #ifdef FEAT_MBYTE
11957 		startcol = regmatch.startp[0]
11958 				    + (*mb_ptr2len)(regmatch.startp[0]) - str;
11959 #else
11960 		startcol = regmatch.startp[0] + 1 - str;
11961 #endif
11962 	    }
11963 	}
11964 
11965 	if (match)
11966 	{
11967 	    if (type == 3)
11968 	    {
11969 		int i;
11970 
11971 		/* return list with matched string and submatches */
11972 		for (i = 0; i < NSUBEXP; ++i)
11973 		{
11974 		    if (regmatch.endp[i] == NULL)
11975 			break;
11976 		    if (list_append_string(rettv->vval.v_list,
11977 				regmatch.startp[i],
11978 				(int)(regmatch.endp[i] - regmatch.startp[i]))
11979 			    == FAIL)
11980 			break;
11981 		}
11982 	    }
11983 	    else if (type == 2)
11984 	    {
11985 		/* return matched string */
11986 		if (l != NULL)
11987 		    copy_tv(&li->li_tv, rettv);
11988 		else
11989 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11990 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11991 	    }
11992 	    else if (l != NULL)
11993 		rettv->vval.v_number = idx;
11994 	    else
11995 	    {
11996 		if (type != 0)
11997 		    rettv->vval.v_number =
11998 				      (varnumber_T)(regmatch.startp[0] - str);
11999 		else
12000 		    rettv->vval.v_number =
12001 					(varnumber_T)(regmatch.endp[0] - str);
12002 		rettv->vval.v_number += str - expr;
12003 	    }
12004 	}
12005 	vim_free(regmatch.regprog);
12006     }
12007 
12008 theend:
12009     vim_free(tofree);
12010     p_cpo = save_cpo;
12011 }
12012 
12013 /*
12014  * "match()" function
12015  */
12016     static void
12017 f_match(argvars, rettv)
12018     typval_T	*argvars;
12019     typval_T	*rettv;
12020 {
12021     find_some_match(argvars, rettv, 1);
12022 }
12023 
12024 /*
12025  * "matchend()" function
12026  */
12027     static void
12028 f_matchend(argvars, rettv)
12029     typval_T	*argvars;
12030     typval_T	*rettv;
12031 {
12032     find_some_match(argvars, rettv, 0);
12033 }
12034 
12035 /*
12036  * "matchlist()" function
12037  */
12038     static void
12039 f_matchlist(argvars, rettv)
12040     typval_T	*argvars;
12041     typval_T	*rettv;
12042 {
12043     find_some_match(argvars, rettv, 3);
12044 }
12045 
12046 /*
12047  * "matchstr()" function
12048  */
12049     static void
12050 f_matchstr(argvars, rettv)
12051     typval_T	*argvars;
12052     typval_T	*rettv;
12053 {
12054     find_some_match(argvars, rettv, 2);
12055 }
12056 
12057 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
12058 
12059     static void
12060 max_min(argvars, rettv, domax)
12061     typval_T	*argvars;
12062     typval_T	*rettv;
12063     int		domax;
12064 {
12065     long	n = 0;
12066     long	i;
12067     int		error = FALSE;
12068 
12069     if (argvars[0].v_type == VAR_LIST)
12070     {
12071 	list_T		*l;
12072 	listitem_T	*li;
12073 
12074 	l = argvars[0].vval.v_list;
12075 	if (l != NULL)
12076 	{
12077 	    li = l->lv_first;
12078 	    if (li != NULL)
12079 	    {
12080 		n = get_tv_number_chk(&li->li_tv, &error);
12081 		for (;;)
12082 		{
12083 		    li = li->li_next;
12084 		    if (li == NULL)
12085 			break;
12086 		    i = get_tv_number_chk(&li->li_tv, &error);
12087 		    if (domax ? i > n : i < n)
12088 			n = i;
12089 		}
12090 	    }
12091 	}
12092     }
12093     else if (argvars[0].v_type == VAR_DICT)
12094     {
12095 	dict_T		*d;
12096 	int		first = TRUE;
12097 	hashitem_T	*hi;
12098 	int		todo;
12099 
12100 	d = argvars[0].vval.v_dict;
12101 	if (d != NULL)
12102 	{
12103 	    todo = d->dv_hashtab.ht_used;
12104 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
12105 	    {
12106 		if (!HASHITEM_EMPTY(hi))
12107 		{
12108 		    --todo;
12109 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
12110 		    if (first)
12111 		    {
12112 			n = i;
12113 			first = FALSE;
12114 		    }
12115 		    else if (domax ? i > n : i < n)
12116 			n = i;
12117 		}
12118 	    }
12119 	}
12120     }
12121     else
12122 	EMSG(_(e_listdictarg));
12123     rettv->vval.v_number = error ? 0 : n;
12124 }
12125 
12126 /*
12127  * "max()" function
12128  */
12129     static void
12130 f_max(argvars, rettv)
12131     typval_T	*argvars;
12132     typval_T	*rettv;
12133 {
12134     max_min(argvars, rettv, TRUE);
12135 }
12136 
12137 /*
12138  * "min()" function
12139  */
12140     static void
12141 f_min(argvars, rettv)
12142     typval_T	*argvars;
12143     typval_T	*rettv;
12144 {
12145     max_min(argvars, rettv, FALSE);
12146 }
12147 
12148 static int mkdir_recurse __ARGS((char_u *dir, int prot));
12149 
12150 /*
12151  * Create the directory in which "dir" is located, and higher levels when
12152  * needed.
12153  */
12154     static int
12155 mkdir_recurse(dir, prot)
12156     char_u	*dir;
12157     int		prot;
12158 {
12159     char_u	*p;
12160     char_u	*updir;
12161     int		r = FAIL;
12162 
12163     /* Get end of directory name in "dir".
12164      * We're done when it's "/" or "c:/". */
12165     p = gettail_sep(dir);
12166     if (p <= get_past_head(dir))
12167 	return OK;
12168 
12169     /* If the directory exists we're done.  Otherwise: create it.*/
12170     updir = vim_strnsave(dir, (int)(p - dir));
12171     if (updir == NULL)
12172 	return FAIL;
12173     if (mch_isdir(updir))
12174 	r = OK;
12175     else if (mkdir_recurse(updir, prot) == OK)
12176 	r = vim_mkdir_emsg(updir, prot);
12177     vim_free(updir);
12178     return r;
12179 }
12180 
12181 #ifdef vim_mkdir
12182 /*
12183  * "mkdir()" function
12184  */
12185     static void
12186 f_mkdir(argvars, rettv)
12187     typval_T	*argvars;
12188     typval_T	*rettv;
12189 {
12190     char_u	*dir;
12191     char_u	buf[NUMBUFLEN];
12192     int		prot = 0755;
12193 
12194     rettv->vval.v_number = FAIL;
12195     if (check_restricted() || check_secure())
12196 	return;
12197 
12198     dir = get_tv_string_buf(&argvars[0], buf);
12199     if (argvars[1].v_type != VAR_UNKNOWN)
12200     {
12201 	if (argvars[2].v_type != VAR_UNKNOWN)
12202 	    prot = get_tv_number_chk(&argvars[2], NULL);
12203 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
12204 	    mkdir_recurse(dir, prot);
12205     }
12206     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
12207 }
12208 #endif
12209 
12210 /*
12211  * "mode()" function
12212  */
12213 /*ARGSUSED*/
12214     static void
12215 f_mode(argvars, rettv)
12216     typval_T	*argvars;
12217     typval_T	*rettv;
12218 {
12219     char_u	buf[2];
12220 
12221 #ifdef FEAT_VISUAL
12222     if (VIsual_active)
12223     {
12224 	if (VIsual_select)
12225 	    buf[0] = VIsual_mode + 's' - 'v';
12226 	else
12227 	    buf[0] = VIsual_mode;
12228     }
12229     else
12230 #endif
12231 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
12232 	buf[0] = 'r';
12233     else if (State & INSERT)
12234     {
12235 	if (State & REPLACE_FLAG)
12236 	    buf[0] = 'R';
12237 	else
12238 	    buf[0] = 'i';
12239     }
12240     else if (State & CMDLINE)
12241 	buf[0] = 'c';
12242     else
12243 	buf[0] = 'n';
12244 
12245     buf[1] = NUL;
12246     rettv->vval.v_string = vim_strsave(buf);
12247     rettv->v_type = VAR_STRING;
12248 }
12249 
12250 /*
12251  * "nextnonblank()" function
12252  */
12253     static void
12254 f_nextnonblank(argvars, rettv)
12255     typval_T	*argvars;
12256     typval_T	*rettv;
12257 {
12258     linenr_T	lnum;
12259 
12260     for (lnum = get_tv_lnum(argvars); ; ++lnum)
12261     {
12262 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
12263 	{
12264 	    lnum = 0;
12265 	    break;
12266 	}
12267 	if (*skipwhite(ml_get(lnum)) != NUL)
12268 	    break;
12269     }
12270     rettv->vval.v_number = lnum;
12271 }
12272 
12273 /*
12274  * "nr2char()" function
12275  */
12276     static void
12277 f_nr2char(argvars, rettv)
12278     typval_T	*argvars;
12279     typval_T	*rettv;
12280 {
12281     char_u	buf[NUMBUFLEN];
12282 
12283 #ifdef FEAT_MBYTE
12284     if (has_mbyte)
12285 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
12286     else
12287 #endif
12288     {
12289 	buf[0] = (char_u)get_tv_number(&argvars[0]);
12290 	buf[1] = NUL;
12291     }
12292     rettv->v_type = VAR_STRING;
12293     rettv->vval.v_string = vim_strsave(buf);
12294 }
12295 
12296 /*
12297  * "prevnonblank()" function
12298  */
12299     static void
12300 f_prevnonblank(argvars, rettv)
12301     typval_T	*argvars;
12302     typval_T	*rettv;
12303 {
12304     linenr_T	lnum;
12305 
12306     lnum = get_tv_lnum(argvars);
12307     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
12308 	lnum = 0;
12309     else
12310 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
12311 	    --lnum;
12312     rettv->vval.v_number = lnum;
12313 }
12314 
12315 #ifdef HAVE_STDARG_H
12316 /* This dummy va_list is here because:
12317  * - passing a NULL pointer doesn't work when va_list isn't a pointer
12318  * - locally in the function results in a "used before set" warning
12319  * - using va_start() to initialize it gives "function with fixed args" error */
12320 static va_list	ap;
12321 #endif
12322 
12323 /*
12324  * "printf()" function
12325  */
12326     static void
12327 f_printf(argvars, rettv)
12328     typval_T	*argvars;
12329     typval_T	*rettv;
12330 {
12331     rettv->v_type = VAR_STRING;
12332     rettv->vval.v_string = NULL;
12333 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
12334     {
12335 	char_u	buf[NUMBUFLEN];
12336 	int	len;
12337 	char_u	*s;
12338 	int	saved_did_emsg = did_emsg;
12339 	char	*fmt;
12340 
12341 	/* Get the required length, allocate the buffer and do it for real. */
12342 	did_emsg = FALSE;
12343 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
12344 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
12345 	if (!did_emsg)
12346 	{
12347 	    s = alloc(len + 1);
12348 	    if (s != NULL)
12349 	    {
12350 		rettv->vval.v_string = s;
12351 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
12352 	    }
12353 	}
12354 	did_emsg |= saved_did_emsg;
12355     }
12356 #endif
12357 }
12358 
12359 /*
12360  * "pumvisible()" function
12361  */
12362 /*ARGSUSED*/
12363     static void
12364 f_pumvisible(argvars, rettv)
12365     typval_T	*argvars;
12366     typval_T	*rettv;
12367 {
12368     rettv->vval.v_number = 0;
12369 #ifdef FEAT_INS_EXPAND
12370     if (pum_visible())
12371 	rettv->vval.v_number = 1;
12372 #endif
12373 }
12374 
12375 /*
12376  * "range()" function
12377  */
12378     static void
12379 f_range(argvars, rettv)
12380     typval_T	*argvars;
12381     typval_T	*rettv;
12382 {
12383     long	start;
12384     long	end;
12385     long	stride = 1;
12386     long	i;
12387     int		error = FALSE;
12388 
12389     start = get_tv_number_chk(&argvars[0], &error);
12390     if (argvars[1].v_type == VAR_UNKNOWN)
12391     {
12392 	end = start - 1;
12393 	start = 0;
12394     }
12395     else
12396     {
12397 	end = get_tv_number_chk(&argvars[1], &error);
12398 	if (argvars[2].v_type != VAR_UNKNOWN)
12399 	    stride = get_tv_number_chk(&argvars[2], &error);
12400     }
12401 
12402     rettv->vval.v_number = 0;
12403     if (error)
12404 	return;		/* type error; errmsg already given */
12405     if (stride == 0)
12406 	EMSG(_("E726: Stride is zero"));
12407     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12408 	EMSG(_("E727: Start past end"));
12409     else
12410     {
12411 	if (rettv_list_alloc(rettv) == OK)
12412 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12413 		if (list_append_number(rettv->vval.v_list,
12414 						      (varnumber_T)i) == FAIL)
12415 		    break;
12416     }
12417 }
12418 
12419 /*
12420  * "readfile()" function
12421  */
12422     static void
12423 f_readfile(argvars, rettv)
12424     typval_T	*argvars;
12425     typval_T	*rettv;
12426 {
12427     int		binary = FALSE;
12428     char_u	*fname;
12429     FILE	*fd;
12430     listitem_T	*li;
12431 #define FREAD_SIZE 200	    /* optimized for text lines */
12432     char_u	buf[FREAD_SIZE];
12433     int		readlen;    /* size of last fread() */
12434     int		buflen;	    /* nr of valid chars in buf[] */
12435     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12436     int		tolist;	    /* first byte in buf[] still to be put in list */
12437     int		chop;	    /* how many CR to chop off */
12438     char_u	*prev = NULL;	/* previously read bytes, if any */
12439     int		prevlen = 0;    /* length of "prev" if not NULL */
12440     char_u	*s;
12441     int		len;
12442     long	maxline = MAXLNUM;
12443     long	cnt = 0;
12444 
12445     if (argvars[1].v_type != VAR_UNKNOWN)
12446     {
12447 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12448 	    binary = TRUE;
12449 	if (argvars[2].v_type != VAR_UNKNOWN)
12450 	    maxline = get_tv_number(&argvars[2]);
12451     }
12452 
12453     if (rettv_list_alloc(rettv) == FAIL)
12454 	return;
12455 
12456     /* Always open the file in binary mode, library functions have a mind of
12457      * their own about CR-LF conversion. */
12458     fname = get_tv_string(&argvars[0]);
12459     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12460     {
12461 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12462 	return;
12463     }
12464 
12465     filtd = 0;
12466     while (cnt < maxline || maxline < 0)
12467     {
12468 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12469 	buflen = filtd + readlen;
12470 	tolist = 0;
12471 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12472 	{
12473 	    if (buf[filtd] == '\n' || readlen <= 0)
12474 	    {
12475 		/* Only when in binary mode add an empty list item when the
12476 		 * last line ends in a '\n'. */
12477 		if (!binary && readlen == 0 && filtd == 0)
12478 		    break;
12479 
12480 		/* Found end-of-line or end-of-file: add a text line to the
12481 		 * list. */
12482 		chop = 0;
12483 		if (!binary)
12484 		    while (filtd - chop - 1 >= tolist
12485 					  && buf[filtd - chop - 1] == '\r')
12486 			++chop;
12487 		len = filtd - tolist - chop;
12488 		if (prev == NULL)
12489 		    s = vim_strnsave(buf + tolist, len);
12490 		else
12491 		{
12492 		    s = alloc((unsigned)(prevlen + len + 1));
12493 		    if (s != NULL)
12494 		    {
12495 			mch_memmove(s, prev, prevlen);
12496 			vim_free(prev);
12497 			prev = NULL;
12498 			mch_memmove(s + prevlen, buf + tolist, len);
12499 			s[prevlen + len] = NUL;
12500 		    }
12501 		}
12502 		tolist = filtd + 1;
12503 
12504 		li = listitem_alloc();
12505 		if (li == NULL)
12506 		{
12507 		    vim_free(s);
12508 		    break;
12509 		}
12510 		li->li_tv.v_type = VAR_STRING;
12511 		li->li_tv.v_lock = 0;
12512 		li->li_tv.vval.v_string = s;
12513 		list_append(rettv->vval.v_list, li);
12514 
12515 		if (++cnt >= maxline && maxline >= 0)
12516 		    break;
12517 		if (readlen <= 0)
12518 		    break;
12519 	    }
12520 	    else if (buf[filtd] == NUL)
12521 		buf[filtd] = '\n';
12522 	}
12523 	if (readlen <= 0)
12524 	    break;
12525 
12526 	if (tolist == 0)
12527 	{
12528 	    /* "buf" is full, need to move text to an allocated buffer */
12529 	    if (prev == NULL)
12530 	    {
12531 		prev = vim_strnsave(buf, buflen);
12532 		prevlen = buflen;
12533 	    }
12534 	    else
12535 	    {
12536 		s = alloc((unsigned)(prevlen + buflen));
12537 		if (s != NULL)
12538 		{
12539 		    mch_memmove(s, prev, prevlen);
12540 		    mch_memmove(s + prevlen, buf, buflen);
12541 		    vim_free(prev);
12542 		    prev = s;
12543 		    prevlen += buflen;
12544 		}
12545 	    }
12546 	    filtd = 0;
12547 	}
12548 	else
12549 	{
12550 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12551 	    filtd -= tolist;
12552 	}
12553     }
12554 
12555     /*
12556      * For a negative line count use only the lines at the end of the file,
12557      * free the rest.
12558      */
12559     if (maxline < 0)
12560 	while (cnt > -maxline)
12561 	{
12562 	    listitem_remove(rettv->vval.v_list, rettv->vval.v_list->lv_first);
12563 	    --cnt;
12564 	}
12565 
12566     vim_free(prev);
12567     fclose(fd);
12568 }
12569 
12570 
12571 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12572 static void make_connection __ARGS((void));
12573 static int check_connection __ARGS((void));
12574 
12575     static void
12576 make_connection()
12577 {
12578     if (X_DISPLAY == NULL
12579 # ifdef FEAT_GUI
12580 	    && !gui.in_use
12581 # endif
12582 	    )
12583     {
12584 	x_force_connect = TRUE;
12585 	setup_term_clip();
12586 	x_force_connect = FALSE;
12587     }
12588 }
12589 
12590     static int
12591 check_connection()
12592 {
12593     make_connection();
12594     if (X_DISPLAY == NULL)
12595     {
12596 	EMSG(_("E240: No connection to Vim server"));
12597 	return FAIL;
12598     }
12599     return OK;
12600 }
12601 #endif
12602 
12603 #ifdef FEAT_CLIENTSERVER
12604 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12605 
12606     static void
12607 remote_common(argvars, rettv, expr)
12608     typval_T	*argvars;
12609     typval_T	*rettv;
12610     int		expr;
12611 {
12612     char_u	*server_name;
12613     char_u	*keys;
12614     char_u	*r = NULL;
12615     char_u	buf[NUMBUFLEN];
12616 # ifdef WIN32
12617     HWND	w;
12618 # else
12619     Window	w;
12620 # endif
12621 
12622     if (check_restricted() || check_secure())
12623 	return;
12624 
12625 # ifdef FEAT_X11
12626     if (check_connection() == FAIL)
12627 	return;
12628 # endif
12629 
12630     server_name = get_tv_string_chk(&argvars[0]);
12631     if (server_name == NULL)
12632 	return;		/* type error; errmsg already given */
12633     keys = get_tv_string_buf(&argvars[1], buf);
12634 # ifdef WIN32
12635     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12636 # else
12637     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12638 									  < 0)
12639 # endif
12640     {
12641 	if (r != NULL)
12642 	    EMSG(r);		/* sending worked but evaluation failed */
12643 	else
12644 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12645 	return;
12646     }
12647 
12648     rettv->vval.v_string = r;
12649 
12650     if (argvars[2].v_type != VAR_UNKNOWN)
12651     {
12652 	dictitem_T	v;
12653 	char_u		str[30];
12654 	char_u		*idvar;
12655 
12656 	sprintf((char *)str, "0x%x", (unsigned int)w);
12657 	v.di_tv.v_type = VAR_STRING;
12658 	v.di_tv.vval.v_string = vim_strsave(str);
12659 	idvar = get_tv_string_chk(&argvars[2]);
12660 	if (idvar != NULL)
12661 	    set_var(idvar, &v.di_tv, FALSE);
12662 	vim_free(v.di_tv.vval.v_string);
12663     }
12664 }
12665 #endif
12666 
12667 /*
12668  * "remote_expr()" function
12669  */
12670 /*ARGSUSED*/
12671     static void
12672 f_remote_expr(argvars, rettv)
12673     typval_T	*argvars;
12674     typval_T	*rettv;
12675 {
12676     rettv->v_type = VAR_STRING;
12677     rettv->vval.v_string = NULL;
12678 #ifdef FEAT_CLIENTSERVER
12679     remote_common(argvars, rettv, TRUE);
12680 #endif
12681 }
12682 
12683 /*
12684  * "remote_foreground()" function
12685  */
12686 /*ARGSUSED*/
12687     static void
12688 f_remote_foreground(argvars, rettv)
12689     typval_T	*argvars;
12690     typval_T	*rettv;
12691 {
12692     rettv->vval.v_number = 0;
12693 #ifdef FEAT_CLIENTSERVER
12694 # ifdef WIN32
12695     /* On Win32 it's done in this application. */
12696     {
12697 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12698 
12699 	if (server_name != NULL)
12700 	    serverForeground(server_name);
12701     }
12702 # else
12703     /* Send a foreground() expression to the server. */
12704     argvars[1].v_type = VAR_STRING;
12705     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12706     argvars[2].v_type = VAR_UNKNOWN;
12707     remote_common(argvars, rettv, TRUE);
12708     vim_free(argvars[1].vval.v_string);
12709 # endif
12710 #endif
12711 }
12712 
12713 /*ARGSUSED*/
12714     static void
12715 f_remote_peek(argvars, rettv)
12716     typval_T	*argvars;
12717     typval_T	*rettv;
12718 {
12719 #ifdef FEAT_CLIENTSERVER
12720     dictitem_T	v;
12721     char_u	*s = NULL;
12722 # ifdef WIN32
12723     int		n = 0;
12724 # endif
12725     char_u	*serverid;
12726 
12727     if (check_restricted() || check_secure())
12728     {
12729 	rettv->vval.v_number = -1;
12730 	return;
12731     }
12732     serverid = get_tv_string_chk(&argvars[0]);
12733     if (serverid == NULL)
12734     {
12735 	rettv->vval.v_number = -1;
12736 	return;		/* type error; errmsg already given */
12737     }
12738 # ifdef WIN32
12739     sscanf(serverid, "%x", &n);
12740     if (n == 0)
12741 	rettv->vval.v_number = -1;
12742     else
12743     {
12744 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12745 	rettv->vval.v_number = (s != NULL);
12746     }
12747 # else
12748     rettv->vval.v_number = 0;
12749     if (check_connection() == FAIL)
12750 	return;
12751 
12752     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12753 						serverStrToWin(serverid), &s);
12754 # endif
12755 
12756     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12757     {
12758 	char_u		*retvar;
12759 
12760 	v.di_tv.v_type = VAR_STRING;
12761 	v.di_tv.vval.v_string = vim_strsave(s);
12762 	retvar = get_tv_string_chk(&argvars[1]);
12763 	if (retvar != NULL)
12764 	    set_var(retvar, &v.di_tv, FALSE);
12765 	vim_free(v.di_tv.vval.v_string);
12766     }
12767 #else
12768     rettv->vval.v_number = -1;
12769 #endif
12770 }
12771 
12772 /*ARGSUSED*/
12773     static void
12774 f_remote_read(argvars, rettv)
12775     typval_T	*argvars;
12776     typval_T	*rettv;
12777 {
12778     char_u	*r = NULL;
12779 
12780 #ifdef FEAT_CLIENTSERVER
12781     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12782 
12783     if (serverid != NULL && !check_restricted() && !check_secure())
12784     {
12785 # ifdef WIN32
12786 	/* The server's HWND is encoded in the 'id' parameter */
12787 	int		n = 0;
12788 
12789 	sscanf(serverid, "%x", &n);
12790 	if (n != 0)
12791 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12792 	if (r == NULL)
12793 # else
12794 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12795 		serverStrToWin(serverid), &r, FALSE) < 0)
12796 # endif
12797 	    EMSG(_("E277: Unable to read a server reply"));
12798     }
12799 #endif
12800     rettv->v_type = VAR_STRING;
12801     rettv->vval.v_string = r;
12802 }
12803 
12804 /*
12805  * "remote_send()" function
12806  */
12807 /*ARGSUSED*/
12808     static void
12809 f_remote_send(argvars, rettv)
12810     typval_T	*argvars;
12811     typval_T	*rettv;
12812 {
12813     rettv->v_type = VAR_STRING;
12814     rettv->vval.v_string = NULL;
12815 #ifdef FEAT_CLIENTSERVER
12816     remote_common(argvars, rettv, FALSE);
12817 #endif
12818 }
12819 
12820 /*
12821  * "remove()" function
12822  */
12823     static void
12824 f_remove(argvars, rettv)
12825     typval_T	*argvars;
12826     typval_T	*rettv;
12827 {
12828     list_T	*l;
12829     listitem_T	*item, *item2;
12830     listitem_T	*li;
12831     long	idx;
12832     long	end;
12833     char_u	*key;
12834     dict_T	*d;
12835     dictitem_T	*di;
12836 
12837     rettv->vval.v_number = 0;
12838     if (argvars[0].v_type == VAR_DICT)
12839     {
12840 	if (argvars[2].v_type != VAR_UNKNOWN)
12841 	    EMSG2(_(e_toomanyarg), "remove()");
12842 	else if ((d = argvars[0].vval.v_dict) != NULL
12843 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12844 	{
12845 	    key = get_tv_string_chk(&argvars[1]);
12846 	    if (key != NULL)
12847 	    {
12848 		di = dict_find(d, key, -1);
12849 		if (di == NULL)
12850 		    EMSG2(_(e_dictkey), key);
12851 		else
12852 		{
12853 		    *rettv = di->di_tv;
12854 		    init_tv(&di->di_tv);
12855 		    dictitem_remove(d, di);
12856 		}
12857 	    }
12858 	}
12859     }
12860     else if (argvars[0].v_type != VAR_LIST)
12861 	EMSG2(_(e_listdictarg), "remove()");
12862     else if ((l = argvars[0].vval.v_list) != NULL
12863 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12864     {
12865 	int	    error = FALSE;
12866 
12867 	idx = get_tv_number_chk(&argvars[1], &error);
12868 	if (error)
12869 	    ;		/* type error: do nothing, errmsg already given */
12870 	else if ((item = list_find(l, idx)) == NULL)
12871 	    EMSGN(_(e_listidx), idx);
12872 	else
12873 	{
12874 	    if (argvars[2].v_type == VAR_UNKNOWN)
12875 	    {
12876 		/* Remove one item, return its value. */
12877 		list_remove(l, item, item);
12878 		*rettv = item->li_tv;
12879 		vim_free(item);
12880 	    }
12881 	    else
12882 	    {
12883 		/* Remove range of items, return list with values. */
12884 		end = get_tv_number_chk(&argvars[2], &error);
12885 		if (error)
12886 		    ;		/* type error: do nothing */
12887 		else if ((item2 = list_find(l, end)) == NULL)
12888 		    EMSGN(_(e_listidx), end);
12889 		else
12890 		{
12891 		    int	    cnt = 0;
12892 
12893 		    for (li = item; li != NULL; li = li->li_next)
12894 		    {
12895 			++cnt;
12896 			if (li == item2)
12897 			    break;
12898 		    }
12899 		    if (li == NULL)  /* didn't find "item2" after "item" */
12900 			EMSG(_(e_invrange));
12901 		    else
12902 		    {
12903 			list_remove(l, item, item2);
12904 			if (rettv_list_alloc(rettv) == OK)
12905 			{
12906 			    l = rettv->vval.v_list;
12907 			    l->lv_first = item;
12908 			    l->lv_last = item2;
12909 			    item->li_prev = NULL;
12910 			    item2->li_next = NULL;
12911 			    l->lv_len = cnt;
12912 			}
12913 		    }
12914 		}
12915 	    }
12916 	}
12917     }
12918 }
12919 
12920 /*
12921  * "rename({from}, {to})" function
12922  */
12923     static void
12924 f_rename(argvars, rettv)
12925     typval_T	*argvars;
12926     typval_T	*rettv;
12927 {
12928     char_u	buf[NUMBUFLEN];
12929 
12930     if (check_restricted() || check_secure())
12931 	rettv->vval.v_number = -1;
12932     else
12933 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12934 				      get_tv_string_buf(&argvars[1], buf));
12935 }
12936 
12937 /*
12938  * "repeat()" function
12939  */
12940 /*ARGSUSED*/
12941     static void
12942 f_repeat(argvars, rettv)
12943     typval_T	*argvars;
12944     typval_T	*rettv;
12945 {
12946     char_u	*p;
12947     int		n;
12948     int		slen;
12949     int		len;
12950     char_u	*r;
12951     int		i;
12952 
12953     n = get_tv_number(&argvars[1]);
12954     if (argvars[0].v_type == VAR_LIST)
12955     {
12956 	if (rettv_list_alloc(rettv) == OK && argvars[0].vval.v_list != NULL)
12957 	    while (n-- > 0)
12958 		if (list_extend(rettv->vval.v_list,
12959 					argvars[0].vval.v_list, NULL) == FAIL)
12960 		    break;
12961     }
12962     else
12963     {
12964 	p = get_tv_string(&argvars[0]);
12965 	rettv->v_type = VAR_STRING;
12966 	rettv->vval.v_string = NULL;
12967 
12968 	slen = (int)STRLEN(p);
12969 	len = slen * n;
12970 	if (len <= 0)
12971 	    return;
12972 
12973 	r = alloc(len + 1);
12974 	if (r != NULL)
12975 	{
12976 	    for (i = 0; i < n; i++)
12977 		mch_memmove(r + i * slen, p, (size_t)slen);
12978 	    r[len] = NUL;
12979 	}
12980 
12981 	rettv->vval.v_string = r;
12982     }
12983 }
12984 
12985 /*
12986  * "resolve()" function
12987  */
12988     static void
12989 f_resolve(argvars, rettv)
12990     typval_T	*argvars;
12991     typval_T	*rettv;
12992 {
12993     char_u	*p;
12994 
12995     p = get_tv_string(&argvars[0]);
12996 #ifdef FEAT_SHORTCUT
12997     {
12998 	char_u	*v = NULL;
12999 
13000 	v = mch_resolve_shortcut(p);
13001 	if (v != NULL)
13002 	    rettv->vval.v_string = v;
13003 	else
13004 	    rettv->vval.v_string = vim_strsave(p);
13005     }
13006 #else
13007 # ifdef HAVE_READLINK
13008     {
13009 	char_u	buf[MAXPATHL + 1];
13010 	char_u	*cpy;
13011 	int	len;
13012 	char_u	*remain = NULL;
13013 	char_u	*q;
13014 	int	is_relative_to_current = FALSE;
13015 	int	has_trailing_pathsep = FALSE;
13016 	int	limit = 100;
13017 
13018 	p = vim_strsave(p);
13019 
13020 	if (p[0] == '.' && (vim_ispathsep(p[1])
13021 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
13022 	    is_relative_to_current = TRUE;
13023 
13024 	len = STRLEN(p);
13025 	if (len > 0 && after_pathsep(p, p + len))
13026 	    has_trailing_pathsep = TRUE;
13027 
13028 	q = getnextcomp(p);
13029 	if (*q != NUL)
13030 	{
13031 	    /* Separate the first path component in "p", and keep the
13032 	     * remainder (beginning with the path separator). */
13033 	    remain = vim_strsave(q - 1);
13034 	    q[-1] = NUL;
13035 	}
13036 
13037 	for (;;)
13038 	{
13039 	    for (;;)
13040 	    {
13041 		len = readlink((char *)p, (char *)buf, MAXPATHL);
13042 		if (len <= 0)
13043 		    break;
13044 		buf[len] = NUL;
13045 
13046 		if (limit-- == 0)
13047 		{
13048 		    vim_free(p);
13049 		    vim_free(remain);
13050 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
13051 		    rettv->vval.v_string = NULL;
13052 		    goto fail;
13053 		}
13054 
13055 		/* Ensure that the result will have a trailing path separator
13056 		 * if the argument has one. */
13057 		if (remain == NULL && has_trailing_pathsep)
13058 		    add_pathsep(buf);
13059 
13060 		/* Separate the first path component in the link value and
13061 		 * concatenate the remainders. */
13062 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
13063 		if (*q != NUL)
13064 		{
13065 		    if (remain == NULL)
13066 			remain = vim_strsave(q - 1);
13067 		    else
13068 		    {
13069 			cpy = concat_str(q - 1, remain);
13070 			if (cpy != NULL)
13071 			{
13072 			    vim_free(remain);
13073 			    remain = cpy;
13074 			}
13075 		    }
13076 		    q[-1] = NUL;
13077 		}
13078 
13079 		q = gettail(p);
13080 		if (q > p && *q == NUL)
13081 		{
13082 		    /* Ignore trailing path separator. */
13083 		    q[-1] = NUL;
13084 		    q = gettail(p);
13085 		}
13086 		if (q > p && !mch_isFullName(buf))
13087 		{
13088 		    /* symlink is relative to directory of argument */
13089 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
13090 		    if (cpy != NULL)
13091 		    {
13092 			STRCPY(cpy, p);
13093 			STRCPY(gettail(cpy), buf);
13094 			vim_free(p);
13095 			p = cpy;
13096 		    }
13097 		}
13098 		else
13099 		{
13100 		    vim_free(p);
13101 		    p = vim_strsave(buf);
13102 		}
13103 	    }
13104 
13105 	    if (remain == NULL)
13106 		break;
13107 
13108 	    /* Append the first path component of "remain" to "p". */
13109 	    q = getnextcomp(remain + 1);
13110 	    len = q - remain - (*q != NUL);
13111 	    cpy = vim_strnsave(p, STRLEN(p) + len);
13112 	    if (cpy != NULL)
13113 	    {
13114 		STRNCAT(cpy, remain, len);
13115 		vim_free(p);
13116 		p = cpy;
13117 	    }
13118 	    /* Shorten "remain". */
13119 	    if (*q != NUL)
13120 		STRCPY(remain, q - 1);
13121 	    else
13122 	    {
13123 		vim_free(remain);
13124 		remain = NULL;
13125 	    }
13126 	}
13127 
13128 	/* If the result is a relative path name, make it explicitly relative to
13129 	 * the current directory if and only if the argument had this form. */
13130 	if (!vim_ispathsep(*p))
13131 	{
13132 	    if (is_relative_to_current
13133 		    && *p != NUL
13134 		    && !(p[0] == '.'
13135 			&& (p[1] == NUL
13136 			    || vim_ispathsep(p[1])
13137 			    || (p[1] == '.'
13138 				&& (p[2] == NUL
13139 				    || vim_ispathsep(p[2]))))))
13140 	    {
13141 		/* Prepend "./". */
13142 		cpy = concat_str((char_u *)"./", p);
13143 		if (cpy != NULL)
13144 		{
13145 		    vim_free(p);
13146 		    p = cpy;
13147 		}
13148 	    }
13149 	    else if (!is_relative_to_current)
13150 	    {
13151 		/* Strip leading "./". */
13152 		q = p;
13153 		while (q[0] == '.' && vim_ispathsep(q[1]))
13154 		    q += 2;
13155 		if (q > p)
13156 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
13157 	    }
13158 	}
13159 
13160 	/* Ensure that the result will have no trailing path separator
13161 	 * if the argument had none.  But keep "/" or "//". */
13162 	if (!has_trailing_pathsep)
13163 	{
13164 	    q = p + STRLEN(p);
13165 	    if (after_pathsep(p, q))
13166 		*gettail_sep(p) = NUL;
13167 	}
13168 
13169 	rettv->vval.v_string = p;
13170     }
13171 # else
13172     rettv->vval.v_string = vim_strsave(p);
13173 # endif
13174 #endif
13175 
13176     simplify_filename(rettv->vval.v_string);
13177 
13178 #ifdef HAVE_READLINK
13179 fail:
13180 #endif
13181     rettv->v_type = VAR_STRING;
13182 }
13183 
13184 /*
13185  * "reverse({list})" function
13186  */
13187     static void
13188 f_reverse(argvars, rettv)
13189     typval_T	*argvars;
13190     typval_T	*rettv;
13191 {
13192     list_T	*l;
13193     listitem_T	*li, *ni;
13194 
13195     rettv->vval.v_number = 0;
13196     if (argvars[0].v_type != VAR_LIST)
13197 	EMSG2(_(e_listarg), "reverse()");
13198     else if ((l = argvars[0].vval.v_list) != NULL
13199 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
13200     {
13201 	li = l->lv_last;
13202 	l->lv_first = l->lv_last = NULL;
13203 	l->lv_len = 0;
13204 	while (li != NULL)
13205 	{
13206 	    ni = li->li_prev;
13207 	    list_append(l, li);
13208 	    li = ni;
13209 	}
13210 	rettv->vval.v_list = l;
13211 	rettv->v_type = VAR_LIST;
13212 	++l->lv_refcount;
13213     }
13214 }
13215 
13216 #define SP_NOMOVE	0x01	    /* don't move cursor */
13217 #define SP_REPEAT	0x02	    /* repeat to find outer pair */
13218 #define SP_RETCOUNT	0x04	    /* return matchcount */
13219 #define SP_SETPCMARK	0x08	    /* set previous context mark */
13220 #define SP_START	0x10	    /* accept match at start position */
13221 #define SP_SUBPAT	0x20	    /* return nr of matching sub-pattern */
13222 #define SP_END		0x40	    /* leave cursor at end of match */
13223 
13224 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
13225 
13226 /*
13227  * Get flags for a search function.
13228  * Possibly sets "p_ws".
13229  * Returns BACKWARD, FORWARD or zero (for an error).
13230  */
13231     static int
13232 get_search_arg(varp, flagsp)
13233     typval_T	*varp;
13234     int		*flagsp;
13235 {
13236     int		dir = FORWARD;
13237     char_u	*flags;
13238     char_u	nbuf[NUMBUFLEN];
13239     int		mask;
13240 
13241     if (varp->v_type != VAR_UNKNOWN)
13242     {
13243 	flags = get_tv_string_buf_chk(varp, nbuf);
13244 	if (flags == NULL)
13245 	    return 0;		/* type error; errmsg already given */
13246 	while (*flags != NUL)
13247 	{
13248 	    switch (*flags)
13249 	    {
13250 		case 'b': dir = BACKWARD; break;
13251 		case 'w': p_ws = TRUE; break;
13252 		case 'W': p_ws = FALSE; break;
13253 		default:  mask = 0;
13254 			  if (flagsp != NULL)
13255 			     switch (*flags)
13256 			     {
13257 				 case 'c': mask = SP_START; break;
13258 				 case 'e': mask = SP_END; break;
13259 				 case 'm': mask = SP_RETCOUNT; break;
13260 				 case 'n': mask = SP_NOMOVE; break;
13261 				 case 'p': mask = SP_SUBPAT; break;
13262 				 case 'r': mask = SP_REPEAT; break;
13263 				 case 's': mask = SP_SETPCMARK; break;
13264 			     }
13265 			  if (mask == 0)
13266 			  {
13267 			      EMSG2(_(e_invarg2), flags);
13268 			      dir = 0;
13269 			  }
13270 			  else
13271 			      *flagsp |= mask;
13272 	    }
13273 	    if (dir == 0)
13274 		break;
13275 	    ++flags;
13276 	}
13277     }
13278     return dir;
13279 }
13280 
13281 /*
13282  * Shared by search() and searchpos() functions
13283  */
13284     static int
13285 search_cmn(argvars, match_pos, flagsp)
13286     typval_T	*argvars;
13287     pos_T	*match_pos;
13288     int		*flagsp;
13289 {
13290     int		flags;
13291     char_u	*pat;
13292     pos_T	pos;
13293     pos_T	save_cursor;
13294     int		save_p_ws = p_ws;
13295     int		dir;
13296     int		retval = 0;	/* default: FAIL */
13297     long	lnum_stop = 0;
13298     int		options = SEARCH_KEEP;
13299     int		subpatnum;
13300 
13301     pat = get_tv_string(&argvars[0]);
13302     dir = get_search_arg(&argvars[1], flagsp);	/* may set p_ws */
13303     if (dir == 0)
13304 	goto theend;
13305     flags = *flagsp;
13306     if (flags & SP_START)
13307 	options |= SEARCH_START;
13308     if (flags & SP_END)
13309 	options |= SEARCH_END;
13310 
13311     /* Optional extra argument: line number to stop searching. */
13312     if (argvars[1].v_type != VAR_UNKNOWN
13313 	    && argvars[2].v_type != VAR_UNKNOWN)
13314     {
13315 	lnum_stop = get_tv_number_chk(&argvars[2], NULL);
13316 	if (lnum_stop < 0)
13317 	    goto theend;
13318     }
13319 
13320     /*
13321      * This function does not accept SP_REPEAT and SP_RETCOUNT flags.
13322      * Check to make sure only those flags are set.
13323      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
13324      * flags cannot be set. Check for that condition also.
13325      */
13326     if (((flags & (SP_REPEAT | SP_RETCOUNT)) != 0)
13327 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13328     {
13329 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13330 	goto theend;
13331     }
13332 
13333     pos = save_cursor = curwin->w_cursor;
13334     subpatnum = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13335 				     options, RE_SEARCH, (linenr_T)lnum_stop);
13336     if (subpatnum != FAIL)
13337     {
13338 	if (flags & SP_SUBPAT)
13339 	    retval = subpatnum;
13340 	else
13341 	    retval = pos.lnum;
13342 	if (flags & SP_SETPCMARK)
13343 	    setpcmark();
13344 	curwin->w_cursor = pos;
13345 	if (match_pos != NULL)
13346 	{
13347 	    /* Store the match cursor position */
13348 	    match_pos->lnum = pos.lnum;
13349 	    match_pos->col = pos.col + 1;
13350 	}
13351 	/* "/$" will put the cursor after the end of the line, may need to
13352 	 * correct that here */
13353 	check_cursor();
13354     }
13355 
13356     /* If 'n' flag is used: restore cursor position. */
13357     if (flags & SP_NOMOVE)
13358 	curwin->w_cursor = save_cursor;
13359 theend:
13360     p_ws = save_p_ws;
13361 
13362     return retval;
13363 }
13364 
13365 /*
13366  * "search()" function
13367  */
13368     static void
13369 f_search(argvars, rettv)
13370     typval_T	*argvars;
13371     typval_T	*rettv;
13372 {
13373     int		flags = 0;
13374 
13375     rettv->vval.v_number = search_cmn(argvars, NULL, &flags);
13376 }
13377 
13378 /*
13379  * "searchdecl()" function
13380  */
13381     static void
13382 f_searchdecl(argvars, rettv)
13383     typval_T	*argvars;
13384     typval_T	*rettv;
13385 {
13386     int		locally = 1;
13387     int		thisblock = 0;
13388     int		error = FALSE;
13389     char_u	*name;
13390 
13391     rettv->vval.v_number = 1;	/* default: FAIL */
13392 
13393     name = get_tv_string_chk(&argvars[0]);
13394     if (argvars[1].v_type != VAR_UNKNOWN)
13395     {
13396 	locally = get_tv_number_chk(&argvars[1], &error) == 0;
13397 	if (!error && argvars[2].v_type != VAR_UNKNOWN)
13398 	    thisblock = get_tv_number_chk(&argvars[2], &error) != 0;
13399     }
13400     if (!error && name != NULL)
13401 	rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
13402 				     locally, thisblock, SEARCH_KEEP) == FAIL;
13403 }
13404 
13405 /*
13406  * Used by searchpair() and searchpairpos()
13407  */
13408     static int
13409 searchpair_cmn(argvars, match_pos)
13410     typval_T	*argvars;
13411     pos_T	*match_pos;
13412 {
13413     char_u	*spat, *mpat, *epat;
13414     char_u	*skip;
13415     int		save_p_ws = p_ws;
13416     int		dir;
13417     int		flags = 0;
13418     char_u	nbuf1[NUMBUFLEN];
13419     char_u	nbuf2[NUMBUFLEN];
13420     char_u	nbuf3[NUMBUFLEN];
13421     int		retval = 0;		/* default: FAIL */
13422     long	lnum_stop = 0;
13423 
13424     /* Get the three pattern arguments: start, middle, end. */
13425     spat = get_tv_string_chk(&argvars[0]);
13426     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
13427     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
13428     if (spat == NULL || mpat == NULL || epat == NULL)
13429 	goto theend;	    /* type error */
13430 
13431     /* Handle the optional fourth argument: flags */
13432     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13433     if (dir == 0)
13434 	goto theend;
13435 
13436     /* Don't accept SP_END or SP_SUBPAT.
13437      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13438      */
13439     if ((flags & (SP_END | SP_SUBPAT)) != 0
13440 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13441     {
13442 	EMSG2(_(e_invarg2), get_tv_string(&argvars[3]));
13443 	goto theend;
13444     }
13445 
13446     /* Optional fifth argument: skip expression */
13447     if (argvars[3].v_type == VAR_UNKNOWN
13448 	    || argvars[4].v_type == VAR_UNKNOWN)
13449 	skip = (char_u *)"";
13450     else
13451     {
13452 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13453 	if (argvars[5].v_type != VAR_UNKNOWN)
13454 	{
13455 	    lnum_stop = get_tv_number_chk(&argvars[5], NULL);
13456 	    if (lnum_stop < 0)
13457 		goto theend;
13458 	}
13459     }
13460     if (skip == NULL)
13461 	goto theend;	    /* type error */
13462 
13463     retval = do_searchpair(spat, mpat, epat, dir, skip, flags,
13464 							match_pos, lnum_stop);
13465 
13466 theend:
13467     p_ws = save_p_ws;
13468 
13469     return retval;
13470 }
13471 
13472 /*
13473  * "searchpair()" function
13474  */
13475     static void
13476 f_searchpair(argvars, rettv)
13477     typval_T	*argvars;
13478     typval_T	*rettv;
13479 {
13480     rettv->vval.v_number = searchpair_cmn(argvars, NULL);
13481 }
13482 
13483 /*
13484  * "searchpairpos()" function
13485  */
13486     static void
13487 f_searchpairpos(argvars, rettv)
13488     typval_T	*argvars;
13489     typval_T	*rettv;
13490 {
13491     pos_T	match_pos;
13492     int		lnum = 0;
13493     int		col = 0;
13494 
13495     rettv->vval.v_number = 0;
13496 
13497     if (rettv_list_alloc(rettv) == FAIL)
13498 	return;
13499 
13500     if (searchpair_cmn(argvars, &match_pos) > 0)
13501     {
13502 	lnum = match_pos.lnum;
13503 	col = match_pos.col;
13504     }
13505 
13506     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
13507     list_append_number(rettv->vval.v_list, (varnumber_T)col);
13508 }
13509 
13510 /*
13511  * Search for a start/middle/end thing.
13512  * Used by searchpair(), see its documentation for the details.
13513  * Returns 0 or -1 for no match,
13514  */
13515     long
13516 do_searchpair(spat, mpat, epat, dir, skip, flags, match_pos, lnum_stop)
13517     char_u	*spat;	    /* start pattern */
13518     char_u	*mpat;	    /* middle pattern */
13519     char_u	*epat;	    /* end pattern */
13520     int		dir;	    /* BACKWARD or FORWARD */
13521     char_u	*skip;	    /* skip expression */
13522     int		flags;	    /* SP_SETPCMARK and other SP_ values */
13523     pos_T	*match_pos;
13524     linenr_T	lnum_stop;  /* stop at this line if not zero */
13525 {
13526     char_u	*save_cpo;
13527     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13528     long	retval = 0;
13529     pos_T	pos;
13530     pos_T	firstpos;
13531     pos_T	foundpos;
13532     pos_T	save_cursor;
13533     pos_T	save_pos;
13534     int		n;
13535     int		r;
13536     int		nest = 1;
13537     int		err;
13538     int		options = SEARCH_KEEP;
13539 
13540     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13541     save_cpo = p_cpo;
13542     p_cpo = (char_u *)"";
13543 
13544     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13545      * start/middle/end (pat3, for the top pair). */
13546     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13547     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13548     if (pat2 == NULL || pat3 == NULL)
13549 	goto theend;
13550     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13551     if (*mpat == NUL)
13552 	STRCPY(pat3, pat2);
13553     else
13554 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13555 							    spat, epat, mpat);
13556     if (flags & SP_START)
13557 	options |= SEARCH_START;
13558 
13559     save_cursor = curwin->w_cursor;
13560     pos = curwin->w_cursor;
13561     clearpos(&firstpos);
13562     clearpos(&foundpos);
13563     pat = pat3;
13564     for (;;)
13565     {
13566 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13567 					       options, RE_SEARCH, lnum_stop);
13568 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13569 	    /* didn't find it or found the first match again: FAIL */
13570 	    break;
13571 
13572 	if (firstpos.lnum == 0)
13573 	    firstpos = pos;
13574 	if (equalpos(pos, foundpos))
13575 	{
13576 	    /* Found the same position again.  Can happen with a pattern that
13577 	     * has "\zs" at the end and searching backwards.  Advance one
13578 	     * character and try again. */
13579 	    if (dir == BACKWARD)
13580 		decl(&pos);
13581 	    else
13582 		incl(&pos);
13583 	}
13584 	foundpos = pos;
13585 
13586 	/* If the skip pattern matches, ignore this match. */
13587 	if (*skip != NUL)
13588 	{
13589 	    save_pos = curwin->w_cursor;
13590 	    curwin->w_cursor = pos;
13591 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13592 	    curwin->w_cursor = save_pos;
13593 	    if (err)
13594 	    {
13595 		/* Evaluating {skip} caused an error, break here. */
13596 		curwin->w_cursor = save_cursor;
13597 		retval = -1;
13598 		break;
13599 	    }
13600 	    if (r)
13601 		continue;
13602 	}
13603 
13604 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13605 	{
13606 	    /* Found end when searching backwards or start when searching
13607 	     * forward: nested pair. */
13608 	    ++nest;
13609 	    pat = pat2;		/* nested, don't search for middle */
13610 	}
13611 	else
13612 	{
13613 	    /* Found end when searching forward or start when searching
13614 	     * backward: end of (nested) pair; or found middle in outer pair. */
13615 	    if (--nest == 1)
13616 		pat = pat3;	/* outer level, search for middle */
13617 	}
13618 
13619 	if (nest == 0)
13620 	{
13621 	    /* Found the match: return matchcount or line number. */
13622 	    if (flags & SP_RETCOUNT)
13623 		++retval;
13624 	    else
13625 		retval = pos.lnum;
13626 	    if (flags & SP_SETPCMARK)
13627 		setpcmark();
13628 	    curwin->w_cursor = pos;
13629 	    if (!(flags & SP_REPEAT))
13630 		break;
13631 	    nest = 1;	    /* search for next unmatched */
13632 	}
13633     }
13634 
13635     if (match_pos != NULL)
13636     {
13637 	/* Store the match cursor position */
13638 	match_pos->lnum = curwin->w_cursor.lnum;
13639 	match_pos->col = curwin->w_cursor.col + 1;
13640     }
13641 
13642     /* If 'n' flag is used or search failed: restore cursor position. */
13643     if ((flags & SP_NOMOVE) || retval == 0)
13644 	curwin->w_cursor = save_cursor;
13645 
13646 theend:
13647     vim_free(pat2);
13648     vim_free(pat3);
13649     p_cpo = save_cpo;
13650 
13651     return retval;
13652 }
13653 
13654 /*
13655  * "searchpos()" function
13656  */
13657     static void
13658 f_searchpos(argvars, rettv)
13659     typval_T	*argvars;
13660     typval_T	*rettv;
13661 {
13662     pos_T	match_pos;
13663     int		lnum = 0;
13664     int		col = 0;
13665     int		n;
13666     int		flags = 0;
13667 
13668     rettv->vval.v_number = 0;
13669 
13670     if (rettv_list_alloc(rettv) == FAIL)
13671 	return;
13672 
13673     n = search_cmn(argvars, &match_pos, &flags);
13674     if (n > 0)
13675     {
13676 	lnum = match_pos.lnum;
13677 	col = match_pos.col;
13678     }
13679 
13680     list_append_number(rettv->vval.v_list, (varnumber_T)lnum);
13681     list_append_number(rettv->vval.v_list, (varnumber_T)col);
13682     if (flags & SP_SUBPAT)
13683 	list_append_number(rettv->vval.v_list, (varnumber_T)n);
13684 }
13685 
13686 
13687 /*ARGSUSED*/
13688     static void
13689 f_server2client(argvars, rettv)
13690     typval_T	*argvars;
13691     typval_T	*rettv;
13692 {
13693 #ifdef FEAT_CLIENTSERVER
13694     char_u	buf[NUMBUFLEN];
13695     char_u	*server = get_tv_string_chk(&argvars[0]);
13696     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13697 
13698     rettv->vval.v_number = -1;
13699     if (server == NULL || reply == NULL)
13700 	return;
13701     if (check_restricted() || check_secure())
13702 	return;
13703 # ifdef FEAT_X11
13704     if (check_connection() == FAIL)
13705 	return;
13706 # endif
13707 
13708     if (serverSendReply(server, reply) < 0)
13709     {
13710 	EMSG(_("E258: Unable to send to client"));
13711 	return;
13712     }
13713     rettv->vval.v_number = 0;
13714 #else
13715     rettv->vval.v_number = -1;
13716 #endif
13717 }
13718 
13719 /*ARGSUSED*/
13720     static void
13721 f_serverlist(argvars, rettv)
13722     typval_T	*argvars;
13723     typval_T	*rettv;
13724 {
13725     char_u	*r = NULL;
13726 
13727 #ifdef FEAT_CLIENTSERVER
13728 # ifdef WIN32
13729     r = serverGetVimNames();
13730 # else
13731     make_connection();
13732     if (X_DISPLAY != NULL)
13733 	r = serverGetVimNames(X_DISPLAY);
13734 # endif
13735 #endif
13736     rettv->v_type = VAR_STRING;
13737     rettv->vval.v_string = r;
13738 }
13739 
13740 /*
13741  * "setbufvar()" function
13742  */
13743 /*ARGSUSED*/
13744     static void
13745 f_setbufvar(argvars, rettv)
13746     typval_T	*argvars;
13747     typval_T	*rettv;
13748 {
13749     buf_T	*buf;
13750 #ifdef FEAT_AUTOCMD
13751     aco_save_T	aco;
13752 #else
13753     buf_T	*save_curbuf;
13754 #endif
13755     char_u	*varname, *bufvarname;
13756     typval_T	*varp;
13757     char_u	nbuf[NUMBUFLEN];
13758 
13759     rettv->vval.v_number = 0;
13760 
13761     if (check_restricted() || check_secure())
13762 	return;
13763     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13764     varname = get_tv_string_chk(&argvars[1]);
13765     buf = get_buf_tv(&argvars[0]);
13766     varp = &argvars[2];
13767 
13768     if (buf != NULL && varname != NULL && varp != NULL)
13769     {
13770 	/* set curbuf to be our buf, temporarily */
13771 #ifdef FEAT_AUTOCMD
13772 	aucmd_prepbuf(&aco, buf);
13773 #else
13774 	save_curbuf = curbuf;
13775 	curbuf = buf;
13776 #endif
13777 
13778 	if (*varname == '&')
13779 	{
13780 	    long	numval;
13781 	    char_u	*strval;
13782 	    int		error = FALSE;
13783 
13784 	    ++varname;
13785 	    numval = get_tv_number_chk(varp, &error);
13786 	    strval = get_tv_string_buf_chk(varp, nbuf);
13787 	    if (!error && strval != NULL)
13788 		set_option_value(varname, numval, strval, OPT_LOCAL);
13789 	}
13790 	else
13791 	{
13792 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13793 	    if (bufvarname != NULL)
13794 	    {
13795 		STRCPY(bufvarname, "b:");
13796 		STRCPY(bufvarname + 2, varname);
13797 		set_var(bufvarname, varp, TRUE);
13798 		vim_free(bufvarname);
13799 	    }
13800 	}
13801 
13802 	/* reset notion of buffer */
13803 #ifdef FEAT_AUTOCMD
13804 	aucmd_restbuf(&aco);
13805 #else
13806 	curbuf = save_curbuf;
13807 #endif
13808     }
13809 }
13810 
13811 /*
13812  * "setcmdpos()" function
13813  */
13814     static void
13815 f_setcmdpos(argvars, rettv)
13816     typval_T	*argvars;
13817     typval_T	*rettv;
13818 {
13819     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13820 
13821     if (pos >= 0)
13822 	rettv->vval.v_number = set_cmdline_pos(pos);
13823 }
13824 
13825 /*
13826  * "setline()" function
13827  */
13828     static void
13829 f_setline(argvars, rettv)
13830     typval_T	*argvars;
13831     typval_T	*rettv;
13832 {
13833     linenr_T	lnum;
13834     char_u	*line = NULL;
13835     list_T	*l = NULL;
13836     listitem_T	*li = NULL;
13837     long	added = 0;
13838     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13839 
13840     lnum = get_tv_lnum(&argvars[0]);
13841     if (argvars[1].v_type == VAR_LIST)
13842     {
13843 	l = argvars[1].vval.v_list;
13844 	li = l->lv_first;
13845     }
13846     else
13847 	line = get_tv_string_chk(&argvars[1]);
13848 
13849     rettv->vval.v_number = 0;		/* OK */
13850     for (;;)
13851     {
13852 	if (l != NULL)
13853 	{
13854 	    /* list argument, get next string */
13855 	    if (li == NULL)
13856 		break;
13857 	    line = get_tv_string_chk(&li->li_tv);
13858 	    li = li->li_next;
13859 	}
13860 
13861 	rettv->vval.v_number = 1;	/* FAIL */
13862 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13863 	    break;
13864 	if (lnum <= curbuf->b_ml.ml_line_count)
13865 	{
13866 	    /* existing line, replace it */
13867 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13868 	    {
13869 		changed_bytes(lnum, 0);
13870 		check_cursor_col();
13871 		rettv->vval.v_number = 0;	/* OK */
13872 	    }
13873 	}
13874 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13875 	{
13876 	    /* lnum is one past the last line, append the line */
13877 	    ++added;
13878 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13879 		rettv->vval.v_number = 0;	/* OK */
13880 	}
13881 
13882 	if (l == NULL)			/* only one string argument */
13883 	    break;
13884 	++lnum;
13885     }
13886 
13887     if (added > 0)
13888 	appended_lines_mark(lcount, added);
13889 }
13890 
13891 /*
13892  * Used by "setqflist()" and "setloclist()" functions
13893  */
13894 /*ARGSUSED*/
13895     static void
13896 set_qf_ll_list(wp, list_arg, action_arg, rettv)
13897     win_T	*wp;
13898     typval_T	*list_arg;
13899     typval_T	*action_arg;
13900     typval_T	*rettv;
13901 {
13902 #ifdef FEAT_QUICKFIX
13903     char_u	*act;
13904     int		action = ' ';
13905 #endif
13906 
13907     rettv->vval.v_number = -1;
13908 
13909 #ifdef FEAT_QUICKFIX
13910     if (list_arg->v_type != VAR_LIST)
13911 	EMSG(_(e_listreq));
13912     else
13913     {
13914 	list_T  *l = list_arg->vval.v_list;
13915 
13916 	if (action_arg->v_type == VAR_STRING)
13917 	{
13918 	    act = get_tv_string_chk(action_arg);
13919 	    if (act == NULL)
13920 		return;		/* type error; errmsg already given */
13921 	    if (*act == 'a' || *act == 'r')
13922 		action = *act;
13923 	}
13924 
13925 	if (l != NULL && set_errorlist(wp, l, action) == OK)
13926 	    rettv->vval.v_number = 0;
13927     }
13928 #endif
13929 }
13930 
13931 /*
13932  * "setloclist()" function
13933  */
13934 /*ARGSUSED*/
13935     static void
13936 f_setloclist(argvars, rettv)
13937     typval_T	*argvars;
13938     typval_T	*rettv;
13939 {
13940     win_T	*win;
13941 
13942     rettv->vval.v_number = -1;
13943 
13944     win = find_win_by_nr(&argvars[0]);
13945     if (win != NULL)
13946 	set_qf_ll_list(win, &argvars[1], &argvars[2], rettv);
13947 }
13948 
13949 /*
13950  * "setpos()" function
13951  */
13952 /*ARGSUSED*/
13953     static void
13954 f_setpos(argvars, rettv)
13955     typval_T	*argvars;
13956     typval_T	*rettv;
13957 {
13958     pos_T	pos;
13959     int		fnum;
13960     char_u	*name;
13961 
13962     name = get_tv_string_chk(argvars);
13963     if (name != NULL)
13964     {
13965 	if (list2fpos(&argvars[1], &pos, &fnum) == OK)
13966 	{
13967 	    --pos.col;
13968 	    if (name[0] == '.')		/* cursor */
13969 	    {
13970 		if (fnum == curbuf->b_fnum)
13971 		{
13972 		    curwin->w_cursor = pos;
13973 		    check_cursor();
13974 		}
13975 		else
13976 		    EMSG(_(e_invarg));
13977 	    }
13978 	    else if (name[0] == '\'')	/* mark */
13979 		(void)setmark_pos(name[1], &pos, fnum);
13980 	    else
13981 		EMSG(_(e_invarg));
13982 	}
13983     }
13984 }
13985 
13986 /*
13987  * "setqflist()" function
13988  */
13989 /*ARGSUSED*/
13990     static void
13991 f_setqflist(argvars, rettv)
13992     typval_T	*argvars;
13993     typval_T	*rettv;
13994 {
13995     set_qf_ll_list(NULL, &argvars[0], &argvars[1], rettv);
13996 }
13997 
13998 /*
13999  * "setreg()" function
14000  */
14001     static void
14002 f_setreg(argvars, rettv)
14003     typval_T	*argvars;
14004     typval_T	*rettv;
14005 {
14006     int		regname;
14007     char_u	*strregname;
14008     char_u	*stropt;
14009     char_u	*strval;
14010     int		append;
14011     char_u	yank_type;
14012     long	block_len;
14013 
14014     block_len = -1;
14015     yank_type = MAUTO;
14016     append = FALSE;
14017 
14018     strregname = get_tv_string_chk(argvars);
14019     rettv->vval.v_number = 1;		/* FAIL is default */
14020 
14021     if (strregname == NULL)
14022 	return;		/* type error; errmsg already given */
14023     regname = *strregname;
14024     if (regname == 0 || regname == '@')
14025 	regname = '"';
14026     else if (regname == '=')
14027 	return;
14028 
14029     if (argvars[2].v_type != VAR_UNKNOWN)
14030     {
14031 	stropt = get_tv_string_chk(&argvars[2]);
14032 	if (stropt == NULL)
14033 	    return;		/* type error */
14034 	for (; *stropt != NUL; ++stropt)
14035 	    switch (*stropt)
14036 	    {
14037 		case 'a': case 'A':	/* append */
14038 		    append = TRUE;
14039 		    break;
14040 		case 'v': case 'c':	/* character-wise selection */
14041 		    yank_type = MCHAR;
14042 		    break;
14043 		case 'V': case 'l':	/* line-wise selection */
14044 		    yank_type = MLINE;
14045 		    break;
14046 #ifdef FEAT_VISUAL
14047 		case 'b': case Ctrl_V:	/* block-wise selection */
14048 		    yank_type = MBLOCK;
14049 		    if (VIM_ISDIGIT(stropt[1]))
14050 		    {
14051 			++stropt;
14052 			block_len = getdigits(&stropt) - 1;
14053 			--stropt;
14054 		    }
14055 		    break;
14056 #endif
14057 	    }
14058     }
14059 
14060     strval = get_tv_string_chk(&argvars[1]);
14061     if (strval != NULL)
14062 	write_reg_contents_ex(regname, strval, -1,
14063 						append, yank_type, block_len);
14064     rettv->vval.v_number = 0;
14065 }
14066 
14067 
14068 /*
14069  * "setwinvar(expr)" function
14070  */
14071 /*ARGSUSED*/
14072     static void
14073 f_setwinvar(argvars, rettv)
14074     typval_T	*argvars;
14075     typval_T	*rettv;
14076 {
14077     win_T	*win;
14078 #ifdef FEAT_WINDOWS
14079     win_T	*save_curwin;
14080 #endif
14081     char_u	*varname, *winvarname;
14082     typval_T	*varp;
14083     char_u	nbuf[NUMBUFLEN];
14084 
14085     rettv->vval.v_number = 0;
14086 
14087     if (check_restricted() || check_secure())
14088 	return;
14089     win = find_win_by_nr(&argvars[0]);
14090     varname = get_tv_string_chk(&argvars[1]);
14091     varp = &argvars[2];
14092 
14093     if (win != NULL && varname != NULL && varp != NULL)
14094     {
14095 #ifdef FEAT_WINDOWS
14096 	/* set curwin to be our win, temporarily */
14097 	save_curwin = curwin;
14098 	curwin = win;
14099 	curbuf = curwin->w_buffer;
14100 #endif
14101 
14102 	if (*varname == '&')
14103 	{
14104 	    long	numval;
14105 	    char_u	*strval;
14106 	    int		error = FALSE;
14107 
14108 	    ++varname;
14109 	    numval = get_tv_number_chk(varp, &error);
14110 	    strval = get_tv_string_buf_chk(varp, nbuf);
14111 	    if (!error && strval != NULL)
14112 		set_option_value(varname, numval, strval, OPT_LOCAL);
14113 	}
14114 	else
14115 	{
14116 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
14117 	    if (winvarname != NULL)
14118 	    {
14119 		STRCPY(winvarname, "w:");
14120 		STRCPY(winvarname + 2, varname);
14121 		set_var(winvarname, varp, TRUE);
14122 		vim_free(winvarname);
14123 	    }
14124 	}
14125 
14126 #ifdef FEAT_WINDOWS
14127 	/* Restore current window, if it's still valid (autocomands can make
14128 	 * it invalid). */
14129 	if (win_valid(save_curwin))
14130 	{
14131 	    curwin = save_curwin;
14132 	    curbuf = curwin->w_buffer;
14133 	}
14134 #endif
14135     }
14136 }
14137 
14138 /*
14139  * "simplify()" function
14140  */
14141     static void
14142 f_simplify(argvars, rettv)
14143     typval_T	*argvars;
14144     typval_T	*rettv;
14145 {
14146     char_u	*p;
14147 
14148     p = get_tv_string(&argvars[0]);
14149     rettv->vval.v_string = vim_strsave(p);
14150     simplify_filename(rettv->vval.v_string);	/* simplify in place */
14151     rettv->v_type = VAR_STRING;
14152 }
14153 
14154 static int
14155 #ifdef __BORLANDC__
14156     _RTLENTRYF
14157 #endif
14158 	item_compare __ARGS((const void *s1, const void *s2));
14159 static int
14160 #ifdef __BORLANDC__
14161     _RTLENTRYF
14162 #endif
14163 	item_compare2 __ARGS((const void *s1, const void *s2));
14164 
14165 static int	item_compare_ic;
14166 static char_u	*item_compare_func;
14167 static int	item_compare_func_err;
14168 #define ITEM_COMPARE_FAIL 999
14169 
14170 /*
14171  * Compare functions for f_sort() below.
14172  */
14173     static int
14174 #ifdef __BORLANDC__
14175 _RTLENTRYF
14176 #endif
14177 item_compare(s1, s2)
14178     const void	*s1;
14179     const void	*s2;
14180 {
14181     char_u	*p1, *p2;
14182     char_u	*tofree1, *tofree2;
14183     int		res;
14184     char_u	numbuf1[NUMBUFLEN];
14185     char_u	numbuf2[NUMBUFLEN];
14186 
14187     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1, 0);
14188     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2, 0);
14189     if (item_compare_ic)
14190 	res = STRICMP(p1, p2);
14191     else
14192 	res = STRCMP(p1, p2);
14193     vim_free(tofree1);
14194     vim_free(tofree2);
14195     return res;
14196 }
14197 
14198     static int
14199 #ifdef __BORLANDC__
14200 _RTLENTRYF
14201 #endif
14202 item_compare2(s1, s2)
14203     const void	*s1;
14204     const void	*s2;
14205 {
14206     int		res;
14207     typval_T	rettv;
14208     typval_T	argv[2];
14209     int		dummy;
14210 
14211     /* shortcut after failure in previous call; compare all items equal */
14212     if (item_compare_func_err)
14213 	return 0;
14214 
14215     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
14216      * in the copy without changing the original list items. */
14217     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
14218     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
14219 
14220     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
14221     res = call_func(item_compare_func, STRLEN(item_compare_func),
14222 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
14223     clear_tv(&argv[0]);
14224     clear_tv(&argv[1]);
14225 
14226     if (res == FAIL)
14227 	res = ITEM_COMPARE_FAIL;
14228     else
14229 	/* return value has wrong type */
14230 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
14231     if (item_compare_func_err)
14232 	res = ITEM_COMPARE_FAIL;
14233     clear_tv(&rettv);
14234     return res;
14235 }
14236 
14237 /*
14238  * "sort({list})" function
14239  */
14240     static void
14241 f_sort(argvars, rettv)
14242     typval_T	*argvars;
14243     typval_T	*rettv;
14244 {
14245     list_T	*l;
14246     listitem_T	*li;
14247     listitem_T	**ptrs;
14248     long	len;
14249     long	i;
14250 
14251     rettv->vval.v_number = 0;
14252     if (argvars[0].v_type != VAR_LIST)
14253 	EMSG2(_(e_listarg), "sort()");
14254     else
14255     {
14256 	l = argvars[0].vval.v_list;
14257 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
14258 	    return;
14259 	rettv->vval.v_list = l;
14260 	rettv->v_type = VAR_LIST;
14261 	++l->lv_refcount;
14262 
14263 	len = list_len(l);
14264 	if (len <= 1)
14265 	    return;	/* short list sorts pretty quickly */
14266 
14267 	item_compare_ic = FALSE;
14268 	item_compare_func = NULL;
14269 	if (argvars[1].v_type != VAR_UNKNOWN)
14270 	{
14271 	    if (argvars[1].v_type == VAR_FUNC)
14272 		item_compare_func = argvars[1].vval.v_string;
14273 	    else
14274 	    {
14275 		int	    error = FALSE;
14276 
14277 		i = get_tv_number_chk(&argvars[1], &error);
14278 		if (error)
14279 		    return;		/* type error; errmsg already given */
14280 		if (i == 1)
14281 		    item_compare_ic = TRUE;
14282 		else
14283 		    item_compare_func = get_tv_string(&argvars[1]);
14284 	    }
14285 	}
14286 
14287 	/* Make an array with each entry pointing to an item in the List. */
14288 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
14289 	if (ptrs == NULL)
14290 	    return;
14291 	i = 0;
14292 	for (li = l->lv_first; li != NULL; li = li->li_next)
14293 	    ptrs[i++] = li;
14294 
14295 	item_compare_func_err = FALSE;
14296 	/* test the compare function */
14297 	if (item_compare_func != NULL
14298 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
14299 							 == ITEM_COMPARE_FAIL)
14300 	    EMSG(_("E702: Sort compare function failed"));
14301 	else
14302 	{
14303 	    /* Sort the array with item pointers. */
14304 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
14305 		    item_compare_func == NULL ? item_compare : item_compare2);
14306 
14307 	    if (!item_compare_func_err)
14308 	    {
14309 		/* Clear the List and append the items in the sorted order. */
14310 		l->lv_first = l->lv_last = NULL;
14311 		l->lv_len = 0;
14312 		for (i = 0; i < len; ++i)
14313 		    list_append(l, ptrs[i]);
14314 	    }
14315 	}
14316 
14317 	vim_free(ptrs);
14318     }
14319 }
14320 
14321 /*
14322  * "soundfold({word})" function
14323  */
14324     static void
14325 f_soundfold(argvars, rettv)
14326     typval_T	*argvars;
14327     typval_T	*rettv;
14328 {
14329     char_u	*s;
14330 
14331     rettv->v_type = VAR_STRING;
14332     s = get_tv_string(&argvars[0]);
14333 #ifdef FEAT_SYN_HL
14334     rettv->vval.v_string = eval_soundfold(s);
14335 #else
14336     rettv->vval.v_string = vim_strsave(s);
14337 #endif
14338 }
14339 
14340 /*
14341  * "spellbadword()" function
14342  */
14343 /* ARGSUSED */
14344     static void
14345 f_spellbadword(argvars, rettv)
14346     typval_T	*argvars;
14347     typval_T	*rettv;
14348 {
14349     char_u	*word = (char_u *)"";
14350     hlf_T	attr = HLF_COUNT;
14351     int		len = 0;
14352 
14353     if (rettv_list_alloc(rettv) == FAIL)
14354 	return;
14355 
14356 #ifdef FEAT_SYN_HL
14357     if (argvars[0].v_type == VAR_UNKNOWN)
14358     {
14359 	/* Find the start and length of the badly spelled word. */
14360 	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
14361 	if (len != 0)
14362 	    word = ml_get_cursor();
14363     }
14364     else if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14365     {
14366 	char_u	*str = get_tv_string_chk(&argvars[0]);
14367 	int	capcol = -1;
14368 
14369 	if (str != NULL)
14370 	{
14371 	    /* Check the argument for spelling. */
14372 	    while (*str != NUL)
14373 	    {
14374 		len = spell_check(curwin, str, &attr, &capcol, FALSE);
14375 		if (attr != HLF_COUNT)
14376 		{
14377 		    word = str;
14378 		    break;
14379 		}
14380 		str += len;
14381 	    }
14382 	}
14383     }
14384 #endif
14385 
14386     list_append_string(rettv->vval.v_list, word, len);
14387     list_append_string(rettv->vval.v_list, (char_u *)(
14388 			attr == HLF_SPB ? "bad" :
14389 			attr == HLF_SPR ? "rare" :
14390 			attr == HLF_SPL ? "local" :
14391 			attr == HLF_SPC ? "caps" :
14392 			""), -1);
14393 }
14394 
14395 /*
14396  * "spellsuggest()" function
14397  */
14398     static void
14399 f_spellsuggest(argvars, rettv)
14400     typval_T	*argvars;
14401     typval_T	*rettv;
14402 {
14403 #ifdef FEAT_SYN_HL
14404     char_u	*str;
14405     int		typeerr = FALSE;
14406     int		maxcount;
14407     garray_T	ga;
14408     int		i;
14409     listitem_T	*li;
14410     int		need_capital = FALSE;
14411 #endif
14412 
14413     if (rettv_list_alloc(rettv) == FAIL)
14414 	return;
14415 
14416 #ifdef FEAT_SYN_HL
14417     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
14418     {
14419 	str = get_tv_string(&argvars[0]);
14420 	if (argvars[1].v_type != VAR_UNKNOWN)
14421 	{
14422 	    maxcount = get_tv_number_chk(&argvars[1], &typeerr);
14423 	    if (maxcount <= 0)
14424 		return;
14425 	    if (argvars[2].v_type != VAR_UNKNOWN)
14426 	    {
14427 		need_capital = get_tv_number_chk(&argvars[2], &typeerr);
14428 		if (typeerr)
14429 		    return;
14430 	    }
14431 	}
14432 	else
14433 	    maxcount = 25;
14434 
14435 	spell_suggest_list(&ga, str, maxcount, need_capital, FALSE);
14436 
14437 	for (i = 0; i < ga.ga_len; ++i)
14438 	{
14439 	    str = ((char_u **)ga.ga_data)[i];
14440 
14441 	    li = listitem_alloc();
14442 	    if (li == NULL)
14443 		vim_free(str);
14444 	    else
14445 	    {
14446 		li->li_tv.v_type = VAR_STRING;
14447 		li->li_tv.v_lock = 0;
14448 		li->li_tv.vval.v_string = str;
14449 		list_append(rettv->vval.v_list, li);
14450 	    }
14451 	}
14452 	ga_clear(&ga);
14453     }
14454 #endif
14455 }
14456 
14457     static void
14458 f_split(argvars, rettv)
14459     typval_T	*argvars;
14460     typval_T	*rettv;
14461 {
14462     char_u	*str;
14463     char_u	*end;
14464     char_u	*pat = NULL;
14465     regmatch_T	regmatch;
14466     char_u	patbuf[NUMBUFLEN];
14467     char_u	*save_cpo;
14468     int		match;
14469     colnr_T	col = 0;
14470     int		keepempty = FALSE;
14471     int		typeerr = FALSE;
14472 
14473     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
14474     save_cpo = p_cpo;
14475     p_cpo = (char_u *)"";
14476 
14477     str = get_tv_string(&argvars[0]);
14478     if (argvars[1].v_type != VAR_UNKNOWN)
14479     {
14480 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14481 	if (pat == NULL)
14482 	    typeerr = TRUE;
14483 	if (argvars[2].v_type != VAR_UNKNOWN)
14484 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
14485     }
14486     if (pat == NULL || *pat == NUL)
14487 	pat = (char_u *)"[\\x01- ]\\+";
14488 
14489     if (rettv_list_alloc(rettv) == FAIL)
14490 	return;
14491     if (typeerr)
14492 	return;
14493 
14494     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
14495     if (regmatch.regprog != NULL)
14496     {
14497 	regmatch.rm_ic = FALSE;
14498 	while (*str != NUL || keepempty)
14499 	{
14500 	    if (*str == NUL)
14501 		match = FALSE;	/* empty item at the end */
14502 	    else
14503 		match = vim_regexec_nl(&regmatch, str, col);
14504 	    if (match)
14505 		end = regmatch.startp[0];
14506 	    else
14507 		end = str + STRLEN(str);
14508 	    if (keepempty || end > str || (rettv->vval.v_list->lv_len > 0
14509 			   && *str != NUL && match && end < regmatch.endp[0]))
14510 	    {
14511 		if (list_append_string(rettv->vval.v_list, str,
14512 						    (int)(end - str)) == FAIL)
14513 		    break;
14514 	    }
14515 	    if (!match)
14516 		break;
14517 	    /* Advance to just after the match. */
14518 	    if (regmatch.endp[0] > str)
14519 		col = 0;
14520 	    else
14521 	    {
14522 		/* Don't get stuck at the same match. */
14523 #ifdef FEAT_MBYTE
14524 		col = (*mb_ptr2len)(regmatch.endp[0]);
14525 #else
14526 		col = 1;
14527 #endif
14528 	    }
14529 	    str = regmatch.endp[0];
14530 	}
14531 
14532 	vim_free(regmatch.regprog);
14533     }
14534 
14535     p_cpo = save_cpo;
14536 }
14537 
14538 #ifdef HAVE_STRFTIME
14539 /*
14540  * "strftime({format}[, {time}])" function
14541  */
14542     static void
14543 f_strftime(argvars, rettv)
14544     typval_T	*argvars;
14545     typval_T	*rettv;
14546 {
14547     char_u	result_buf[256];
14548     struct tm	*curtime;
14549     time_t	seconds;
14550     char_u	*p;
14551 
14552     rettv->v_type = VAR_STRING;
14553 
14554     p = get_tv_string(&argvars[0]);
14555     if (argvars[1].v_type == VAR_UNKNOWN)
14556 	seconds = time(NULL);
14557     else
14558 	seconds = (time_t)get_tv_number(&argvars[1]);
14559     curtime = localtime(&seconds);
14560     /* MSVC returns NULL for an invalid value of seconds. */
14561     if (curtime == NULL)
14562 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
14563     else
14564     {
14565 # ifdef FEAT_MBYTE
14566 	vimconv_T   conv;
14567 	char_u	    *enc;
14568 
14569 	conv.vc_type = CONV_NONE;
14570 	enc = enc_locale();
14571 	convert_setup(&conv, p_enc, enc);
14572 	if (conv.vc_type != CONV_NONE)
14573 	    p = string_convert(&conv, p, NULL);
14574 # endif
14575 	if (p != NULL)
14576 	    (void)strftime((char *)result_buf, sizeof(result_buf),
14577 							  (char *)p, curtime);
14578 	else
14579 	    result_buf[0] = NUL;
14580 
14581 # ifdef FEAT_MBYTE
14582 	if (conv.vc_type != CONV_NONE)
14583 	    vim_free(p);
14584 	convert_setup(&conv, enc, p_enc);
14585 	if (conv.vc_type != CONV_NONE)
14586 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
14587 	else
14588 # endif
14589 	    rettv->vval.v_string = vim_strsave(result_buf);
14590 
14591 # ifdef FEAT_MBYTE
14592 	/* Release conversion descriptors */
14593 	convert_setup(&conv, NULL, NULL);
14594 	vim_free(enc);
14595 # endif
14596     }
14597 }
14598 #endif
14599 
14600 /*
14601  * "stridx()" function
14602  */
14603     static void
14604 f_stridx(argvars, rettv)
14605     typval_T	*argvars;
14606     typval_T	*rettv;
14607 {
14608     char_u	buf[NUMBUFLEN];
14609     char_u	*needle;
14610     char_u	*haystack;
14611     char_u	*save_haystack;
14612     char_u	*pos;
14613     int		start_idx;
14614 
14615     needle = get_tv_string_chk(&argvars[1]);
14616     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
14617     rettv->vval.v_number = -1;
14618     if (needle == NULL || haystack == NULL)
14619 	return;		/* type error; errmsg already given */
14620 
14621     if (argvars[2].v_type != VAR_UNKNOWN)
14622     {
14623 	int	    error = FALSE;
14624 
14625 	start_idx = get_tv_number_chk(&argvars[2], &error);
14626 	if (error || start_idx >= (int)STRLEN(haystack))
14627 	    return;
14628 	if (start_idx >= 0)
14629 	    haystack += start_idx;
14630     }
14631 
14632     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14633     if (pos != NULL)
14634 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14635 }
14636 
14637 /*
14638  * "string()" function
14639  */
14640     static void
14641 f_string(argvars, rettv)
14642     typval_T	*argvars;
14643     typval_T	*rettv;
14644 {
14645     char_u	*tofree;
14646     char_u	numbuf[NUMBUFLEN];
14647 
14648     rettv->v_type = VAR_STRING;
14649     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf, 0);
14650     if (tofree == NULL)
14651 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14652 }
14653 
14654 /*
14655  * "strlen()" function
14656  */
14657     static void
14658 f_strlen(argvars, rettv)
14659     typval_T	*argvars;
14660     typval_T	*rettv;
14661 {
14662     rettv->vval.v_number = (varnumber_T)(STRLEN(
14663 					      get_tv_string(&argvars[0])));
14664 }
14665 
14666 /*
14667  * "strpart()" function
14668  */
14669     static void
14670 f_strpart(argvars, rettv)
14671     typval_T	*argvars;
14672     typval_T	*rettv;
14673 {
14674     char_u	*p;
14675     int		n;
14676     int		len;
14677     int		slen;
14678     int		error = FALSE;
14679 
14680     p = get_tv_string(&argvars[0]);
14681     slen = (int)STRLEN(p);
14682 
14683     n = get_tv_number_chk(&argvars[1], &error);
14684     if (error)
14685 	len = 0;
14686     else if (argvars[2].v_type != VAR_UNKNOWN)
14687 	len = get_tv_number(&argvars[2]);
14688     else
14689 	len = slen - n;	    /* default len: all bytes that are available. */
14690 
14691     /*
14692      * Only return the overlap between the specified part and the actual
14693      * string.
14694      */
14695     if (n < 0)
14696     {
14697 	len += n;
14698 	n = 0;
14699     }
14700     else if (n > slen)
14701 	n = slen;
14702     if (len < 0)
14703 	len = 0;
14704     else if (n + len > slen)
14705 	len = slen - n;
14706 
14707     rettv->v_type = VAR_STRING;
14708     rettv->vval.v_string = vim_strnsave(p + n, len);
14709 }
14710 
14711 /*
14712  * "strridx()" function
14713  */
14714     static void
14715 f_strridx(argvars, rettv)
14716     typval_T	*argvars;
14717     typval_T	*rettv;
14718 {
14719     char_u	buf[NUMBUFLEN];
14720     char_u	*needle;
14721     char_u	*haystack;
14722     char_u	*rest;
14723     char_u	*lastmatch = NULL;
14724     int		haystack_len, end_idx;
14725 
14726     needle = get_tv_string_chk(&argvars[1]);
14727     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14728     haystack_len = STRLEN(haystack);
14729 
14730     rettv->vval.v_number = -1;
14731     if (needle == NULL || haystack == NULL)
14732 	return;		/* type error; errmsg already given */
14733     if (argvars[2].v_type != VAR_UNKNOWN)
14734     {
14735 	/* Third argument: upper limit for index */
14736 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14737 	if (end_idx < 0)
14738 	    return;	/* can never find a match */
14739     }
14740     else
14741 	end_idx = haystack_len;
14742 
14743     if (*needle == NUL)
14744     {
14745 	/* Empty string matches past the end. */
14746 	lastmatch = haystack + end_idx;
14747     }
14748     else
14749     {
14750 	for (rest = haystack; *rest != '\0'; ++rest)
14751 	{
14752 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14753 	    if (rest == NULL || rest > haystack + end_idx)
14754 		break;
14755 	    lastmatch = rest;
14756 	}
14757     }
14758 
14759     if (lastmatch == NULL)
14760 	rettv->vval.v_number = -1;
14761     else
14762 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14763 }
14764 
14765 /*
14766  * "strtrans()" function
14767  */
14768     static void
14769 f_strtrans(argvars, rettv)
14770     typval_T	*argvars;
14771     typval_T	*rettv;
14772 {
14773     rettv->v_type = VAR_STRING;
14774     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14775 }
14776 
14777 /*
14778  * "submatch()" function
14779  */
14780     static void
14781 f_submatch(argvars, rettv)
14782     typval_T	*argvars;
14783     typval_T	*rettv;
14784 {
14785     rettv->v_type = VAR_STRING;
14786     rettv->vval.v_string =
14787 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14788 }
14789 
14790 /*
14791  * "substitute()" function
14792  */
14793     static void
14794 f_substitute(argvars, rettv)
14795     typval_T	*argvars;
14796     typval_T	*rettv;
14797 {
14798     char_u	patbuf[NUMBUFLEN];
14799     char_u	subbuf[NUMBUFLEN];
14800     char_u	flagsbuf[NUMBUFLEN];
14801 
14802     char_u	*str = get_tv_string_chk(&argvars[0]);
14803     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14804     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14805     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14806 
14807     rettv->v_type = VAR_STRING;
14808     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14809 	rettv->vval.v_string = NULL;
14810     else
14811 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14812 }
14813 
14814 /*
14815  * "synID(lnum, col, trans)" function
14816  */
14817 /*ARGSUSED*/
14818     static void
14819 f_synID(argvars, rettv)
14820     typval_T	*argvars;
14821     typval_T	*rettv;
14822 {
14823     int		id = 0;
14824 #ifdef FEAT_SYN_HL
14825     long	lnum;
14826     long	col;
14827     int		trans;
14828     int		transerr = FALSE;
14829 
14830     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14831     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14832     trans = get_tv_number_chk(&argvars[2], &transerr);
14833 
14834     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14835 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14836 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
14837 #endif
14838 
14839     rettv->vval.v_number = id;
14840 }
14841 
14842 /*
14843  * "synIDattr(id, what [, mode])" function
14844  */
14845 /*ARGSUSED*/
14846     static void
14847 f_synIDattr(argvars, rettv)
14848     typval_T	*argvars;
14849     typval_T	*rettv;
14850 {
14851     char_u	*p = NULL;
14852 #ifdef FEAT_SYN_HL
14853     int		id;
14854     char_u	*what;
14855     char_u	*mode;
14856     char_u	modebuf[NUMBUFLEN];
14857     int		modec;
14858 
14859     id = get_tv_number(&argvars[0]);
14860     what = get_tv_string(&argvars[1]);
14861     if (argvars[2].v_type != VAR_UNKNOWN)
14862     {
14863 	mode = get_tv_string_buf(&argvars[2], modebuf);
14864 	modec = TOLOWER_ASC(mode[0]);
14865 	if (modec != 't' && modec != 'c'
14866 #ifdef FEAT_GUI
14867 		&& modec != 'g'
14868 #endif
14869 		)
14870 	    modec = 0;	/* replace invalid with current */
14871     }
14872     else
14873     {
14874 #ifdef FEAT_GUI
14875 	if (gui.in_use)
14876 	    modec = 'g';
14877 	else
14878 #endif
14879 	    if (t_colors > 1)
14880 	    modec = 'c';
14881 	else
14882 	    modec = 't';
14883     }
14884 
14885 
14886     switch (TOLOWER_ASC(what[0]))
14887     {
14888 	case 'b':
14889 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14890 		    p = highlight_color(id, what, modec);
14891 		else					/* bold */
14892 		    p = highlight_has_attr(id, HL_BOLD, modec);
14893 		break;
14894 
14895 	case 'f':					/* fg[#] */
14896 		p = highlight_color(id, what, modec);
14897 		break;
14898 
14899 	case 'i':
14900 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14901 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14902 		else					/* italic */
14903 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14904 		break;
14905 
14906 	case 'n':					/* name */
14907 		p = get_highlight_name(NULL, id - 1);
14908 		break;
14909 
14910 	case 'r':					/* reverse */
14911 		p = highlight_has_attr(id, HL_INVERSE, modec);
14912 		break;
14913 
14914 	case 's':					/* standout */
14915 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14916 		break;
14917 
14918 	case 'u':
14919 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14920 							/* underline */
14921 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14922 		else
14923 							/* undercurl */
14924 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14925 		break;
14926     }
14927 
14928     if (p != NULL)
14929 	p = vim_strsave(p);
14930 #endif
14931     rettv->v_type = VAR_STRING;
14932     rettv->vval.v_string = p;
14933 }
14934 
14935 /*
14936  * "synIDtrans(id)" function
14937  */
14938 /*ARGSUSED*/
14939     static void
14940 f_synIDtrans(argvars, rettv)
14941     typval_T	*argvars;
14942     typval_T	*rettv;
14943 {
14944     int		id;
14945 
14946 #ifdef FEAT_SYN_HL
14947     id = get_tv_number(&argvars[0]);
14948 
14949     if (id > 0)
14950 	id = syn_get_final_id(id);
14951     else
14952 #endif
14953 	id = 0;
14954 
14955     rettv->vval.v_number = id;
14956 }
14957 
14958 /*
14959  * "system()" function
14960  */
14961     static void
14962 f_system(argvars, rettv)
14963     typval_T	*argvars;
14964     typval_T	*rettv;
14965 {
14966     char_u	*res = NULL;
14967     char_u	*p;
14968     char_u	*infile = NULL;
14969     char_u	buf[NUMBUFLEN];
14970     int		err = FALSE;
14971     FILE	*fd;
14972 
14973     if (argvars[1].v_type != VAR_UNKNOWN)
14974     {
14975 	/*
14976 	 * Write the string to a temp file, to be used for input of the shell
14977 	 * command.
14978 	 */
14979 	if ((infile = vim_tempname('i')) == NULL)
14980 	{
14981 	    EMSG(_(e_notmp));
14982 	    return;
14983 	}
14984 
14985 	fd = mch_fopen((char *)infile, WRITEBIN);
14986 	if (fd == NULL)
14987 	{
14988 	    EMSG2(_(e_notopen), infile);
14989 	    goto done;
14990 	}
14991 	p = get_tv_string_buf_chk(&argvars[1], buf);
14992 	if (p == NULL)
14993 	    goto done;		/* type error; errmsg already given */
14994 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14995 	    err = TRUE;
14996 	if (fclose(fd) != 0)
14997 	    err = TRUE;
14998 	if (err)
14999 	{
15000 	    EMSG(_("E677: Error writing temp file"));
15001 	    goto done;
15002 	}
15003     }
15004 
15005     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
15006 
15007 #ifdef USE_CR
15008     /* translate <CR> into <NL> */
15009     if (res != NULL)
15010     {
15011 	char_u	*s;
15012 
15013 	for (s = res; *s; ++s)
15014 	{
15015 	    if (*s == CAR)
15016 		*s = NL;
15017 	}
15018     }
15019 #else
15020 # ifdef USE_CRNL
15021     /* translate <CR><NL> into <NL> */
15022     if (res != NULL)
15023     {
15024 	char_u	*s, *d;
15025 
15026 	d = res;
15027 	for (s = res; *s; ++s)
15028 	{
15029 	    if (s[0] == CAR && s[1] == NL)
15030 		++s;
15031 	    *d++ = *s;
15032 	}
15033 	*d = NUL;
15034     }
15035 # endif
15036 #endif
15037 
15038 done:
15039     if (infile != NULL)
15040     {
15041 	mch_remove(infile);
15042 	vim_free(infile);
15043     }
15044     rettv->v_type = VAR_STRING;
15045     rettv->vval.v_string = res;
15046 }
15047 
15048 /*
15049  * "tabpagebuflist()" function
15050  */
15051 /* ARGSUSED */
15052     static void
15053 f_tabpagebuflist(argvars, rettv)
15054     typval_T	*argvars;
15055     typval_T	*rettv;
15056 {
15057 #ifndef FEAT_WINDOWS
15058     rettv->vval.v_number = 0;
15059 #else
15060     tabpage_T	*tp;
15061     win_T	*wp = NULL;
15062 
15063     if (argvars[0].v_type == VAR_UNKNOWN)
15064 	wp = firstwin;
15065     else
15066     {
15067 	tp = find_tabpage((int)get_tv_number(&argvars[0]));
15068 	if (tp != NULL)
15069 	    wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15070     }
15071     if (wp == NULL)
15072 	rettv->vval.v_number = 0;
15073     else
15074     {
15075 	if (rettv_list_alloc(rettv) == FAIL)
15076 	    rettv->vval.v_number = 0;
15077 	else
15078 	{
15079 	    for (; wp != NULL; wp = wp->w_next)
15080 		if (list_append_number(rettv->vval.v_list,
15081 						wp->w_buffer->b_fnum) == FAIL)
15082 		    break;
15083 	}
15084     }
15085 #endif
15086 }
15087 
15088 
15089 /*
15090  * "tabpagenr()" function
15091  */
15092 /* ARGSUSED */
15093     static void
15094 f_tabpagenr(argvars, rettv)
15095     typval_T	*argvars;
15096     typval_T	*rettv;
15097 {
15098     int		nr = 1;
15099 #ifdef FEAT_WINDOWS
15100     char_u	*arg;
15101 
15102     if (argvars[0].v_type != VAR_UNKNOWN)
15103     {
15104 	arg = get_tv_string_chk(&argvars[0]);
15105 	nr = 0;
15106 	if (arg != NULL)
15107 	{
15108 	    if (STRCMP(arg, "$") == 0)
15109 		nr = tabpage_index(NULL) - 1;
15110 	    else
15111 		EMSG2(_(e_invexpr2), arg);
15112 	}
15113     }
15114     else
15115 	nr = tabpage_index(curtab);
15116 #endif
15117     rettv->vval.v_number = nr;
15118 }
15119 
15120 
15121 #ifdef FEAT_WINDOWS
15122 static int get_winnr __ARGS((tabpage_T *tp, typval_T *argvar));
15123 
15124 /*
15125  * Common code for tabpagewinnr() and winnr().
15126  */
15127     static int
15128 get_winnr(tp, argvar)
15129     tabpage_T	*tp;
15130     typval_T	*argvar;
15131 {
15132     win_T	*twin;
15133     int		nr = 1;
15134     win_T	*wp;
15135     char_u	*arg;
15136 
15137     twin = (tp == curtab) ? curwin : tp->tp_curwin;
15138     if (argvar->v_type != VAR_UNKNOWN)
15139     {
15140 	arg = get_tv_string_chk(argvar);
15141 	if (arg == NULL)
15142 	    nr = 0;		/* type error; errmsg already given */
15143 	else if (STRCMP(arg, "$") == 0)
15144 	    twin = (tp == curtab) ? lastwin : tp->tp_lastwin;
15145 	else if (STRCMP(arg, "#") == 0)
15146 	{
15147 	    twin = (tp == curtab) ? prevwin : tp->tp_prevwin;
15148 	    if (twin == NULL)
15149 		nr = 0;
15150 	}
15151 	else
15152 	{
15153 	    EMSG2(_(e_invexpr2), arg);
15154 	    nr = 0;
15155 	}
15156     }
15157 
15158     if (nr > 0)
15159 	for (wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
15160 					      wp != twin; wp = wp->w_next)
15161 	    ++nr;
15162     return nr;
15163 }
15164 #endif
15165 
15166 /*
15167  * "tabpagewinnr()" function
15168  */
15169 /* ARGSUSED */
15170     static void
15171 f_tabpagewinnr(argvars, rettv)
15172     typval_T	*argvars;
15173     typval_T	*rettv;
15174 {
15175     int		nr = 1;
15176 #ifdef FEAT_WINDOWS
15177     tabpage_T	*tp;
15178 
15179     tp = find_tabpage((int)get_tv_number(&argvars[0]));
15180     if (tp == NULL)
15181 	nr = 0;
15182     else
15183 	nr = get_winnr(tp, &argvars[1]);
15184 #endif
15185     rettv->vval.v_number = nr;
15186 }
15187 
15188 
15189 /*
15190  * "tagfiles()" function
15191  */
15192 /*ARGSUSED*/
15193     static void
15194 f_tagfiles(argvars, rettv)
15195     typval_T	*argvars;
15196     typval_T	*rettv;
15197 {
15198     char_u	fname[MAXPATHL + 1];
15199     tagname_T	tn;
15200     int		first;
15201 
15202     if (rettv_list_alloc(rettv) == FAIL)
15203     {
15204 	rettv->vval.v_number = 0;
15205 	return;
15206     }
15207 
15208     for (first = TRUE; ; first = FALSE)
15209 	if (get_tagfname(&tn, first, fname) == FAIL
15210 		|| list_append_string(rettv->vval.v_list, fname, -1) == FAIL)
15211 	    break;
15212     tagname_free(&tn);
15213 }
15214 
15215 /*
15216  * "taglist()" function
15217  */
15218     static void
15219 f_taglist(argvars, rettv)
15220     typval_T  *argvars;
15221     typval_T  *rettv;
15222 {
15223     char_u  *tag_pattern;
15224 
15225     tag_pattern = get_tv_string(&argvars[0]);
15226 
15227     rettv->vval.v_number = FALSE;
15228     if (*tag_pattern == NUL)
15229 	return;
15230 
15231     if (rettv_list_alloc(rettv) == OK)
15232 	(void)get_tags(rettv->vval.v_list, tag_pattern);
15233 }
15234 
15235 /*
15236  * "tempname()" function
15237  */
15238 /*ARGSUSED*/
15239     static void
15240 f_tempname(argvars, rettv)
15241     typval_T	*argvars;
15242     typval_T	*rettv;
15243 {
15244     static int	x = 'A';
15245 
15246     rettv->v_type = VAR_STRING;
15247     rettv->vval.v_string = vim_tempname(x);
15248 
15249     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
15250      * names.  Skip 'I' and 'O', they are used for shell redirection. */
15251     do
15252     {
15253 	if (x == 'Z')
15254 	    x = '0';
15255 	else if (x == '9')
15256 	    x = 'A';
15257 	else
15258 	{
15259 #ifdef EBCDIC
15260 	    if (x == 'I')
15261 		x = 'J';
15262 	    else if (x == 'R')
15263 		x = 'S';
15264 	    else
15265 #endif
15266 		++x;
15267 	}
15268     } while (x == 'I' || x == 'O');
15269 }
15270 
15271 /*
15272  * "test(list)" function: Just checking the walls...
15273  */
15274 /*ARGSUSED*/
15275     static void
15276 f_test(argvars, rettv)
15277     typval_T	*argvars;
15278     typval_T	*rettv;
15279 {
15280     /* Used for unit testing.  Change the code below to your liking. */
15281 #if 0
15282     listitem_T	*li;
15283     list_T	*l;
15284     char_u	*bad, *good;
15285 
15286     if (argvars[0].v_type != VAR_LIST)
15287 	return;
15288     l = argvars[0].vval.v_list;
15289     if (l == NULL)
15290 	return;
15291     li = l->lv_first;
15292     if (li == NULL)
15293 	return;
15294     bad = get_tv_string(&li->li_tv);
15295     li = li->li_next;
15296     if (li == NULL)
15297 	return;
15298     good = get_tv_string(&li->li_tv);
15299     rettv->vval.v_number = test_edit_score(bad, good);
15300 #endif
15301 }
15302 
15303 /*
15304  * "tolower(string)" function
15305  */
15306     static void
15307 f_tolower(argvars, rettv)
15308     typval_T	*argvars;
15309     typval_T	*rettv;
15310 {
15311     char_u	*p;
15312 
15313     p = vim_strsave(get_tv_string(&argvars[0]));
15314     rettv->v_type = VAR_STRING;
15315     rettv->vval.v_string = p;
15316 
15317     if (p != NULL)
15318 	while (*p != NUL)
15319 	{
15320 #ifdef FEAT_MBYTE
15321 	    int		l;
15322 
15323 	    if (enc_utf8)
15324 	    {
15325 		int c, lc;
15326 
15327 		c = utf_ptr2char(p);
15328 		lc = utf_tolower(c);
15329 		l = utf_ptr2len(p);
15330 		/* TODO: reallocate string when byte count changes. */
15331 		if (utf_char2len(lc) == l)
15332 		    utf_char2bytes(lc, p);
15333 		p += l;
15334 	    }
15335 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
15336 		p += l;		/* skip multi-byte character */
15337 	    else
15338 #endif
15339 	    {
15340 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
15341 		++p;
15342 	    }
15343 	}
15344 }
15345 
15346 /*
15347  * "toupper(string)" function
15348  */
15349     static void
15350 f_toupper(argvars, rettv)
15351     typval_T	*argvars;
15352     typval_T	*rettv;
15353 {
15354     rettv->v_type = VAR_STRING;
15355     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
15356 }
15357 
15358 /*
15359  * "tr(string, fromstr, tostr)" function
15360  */
15361     static void
15362 f_tr(argvars, rettv)
15363     typval_T	*argvars;
15364     typval_T	*rettv;
15365 {
15366     char_u	*instr;
15367     char_u	*fromstr;
15368     char_u	*tostr;
15369     char_u	*p;
15370 #ifdef FEAT_MBYTE
15371     int		inlen;
15372     int		fromlen;
15373     int		tolen;
15374     int		idx;
15375     char_u	*cpstr;
15376     int		cplen;
15377     int		first = TRUE;
15378 #endif
15379     char_u	buf[NUMBUFLEN];
15380     char_u	buf2[NUMBUFLEN];
15381     garray_T	ga;
15382 
15383     instr = get_tv_string(&argvars[0]);
15384     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
15385     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
15386 
15387     /* Default return value: empty string. */
15388     rettv->v_type = VAR_STRING;
15389     rettv->vval.v_string = NULL;
15390     if (fromstr == NULL || tostr == NULL)
15391 	    return;		/* type error; errmsg already given */
15392     ga_init2(&ga, (int)sizeof(char), 80);
15393 
15394 #ifdef FEAT_MBYTE
15395     if (!has_mbyte)
15396 #endif
15397 	/* not multi-byte: fromstr and tostr must be the same length */
15398 	if (STRLEN(fromstr) != STRLEN(tostr))
15399 	{
15400 #ifdef FEAT_MBYTE
15401 error:
15402 #endif
15403 	    EMSG2(_(e_invarg2), fromstr);
15404 	    ga_clear(&ga);
15405 	    return;
15406 	}
15407 
15408     /* fromstr and tostr have to contain the same number of chars */
15409     while (*instr != NUL)
15410     {
15411 #ifdef FEAT_MBYTE
15412 	if (has_mbyte)
15413 	{
15414 	    inlen = (*mb_ptr2len)(instr);
15415 	    cpstr = instr;
15416 	    cplen = inlen;
15417 	    idx = 0;
15418 	    for (p = fromstr; *p != NUL; p += fromlen)
15419 	    {
15420 		fromlen = (*mb_ptr2len)(p);
15421 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
15422 		{
15423 		    for (p = tostr; *p != NUL; p += tolen)
15424 		    {
15425 			tolen = (*mb_ptr2len)(p);
15426 			if (idx-- == 0)
15427 			{
15428 			    cplen = tolen;
15429 			    cpstr = p;
15430 			    break;
15431 			}
15432 		    }
15433 		    if (*p == NUL)	/* tostr is shorter than fromstr */
15434 			goto error;
15435 		    break;
15436 		}
15437 		++idx;
15438 	    }
15439 
15440 	    if (first && cpstr == instr)
15441 	    {
15442 		/* Check that fromstr and tostr have the same number of
15443 		 * (multi-byte) characters.  Done only once when a character
15444 		 * of instr doesn't appear in fromstr. */
15445 		first = FALSE;
15446 		for (p = tostr; *p != NUL; p += tolen)
15447 		{
15448 		    tolen = (*mb_ptr2len)(p);
15449 		    --idx;
15450 		}
15451 		if (idx != 0)
15452 		    goto error;
15453 	    }
15454 
15455 	    ga_grow(&ga, cplen);
15456 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
15457 	    ga.ga_len += cplen;
15458 
15459 	    instr += inlen;
15460 	}
15461 	else
15462 #endif
15463 	{
15464 	    /* When not using multi-byte chars we can do it faster. */
15465 	    p = vim_strchr(fromstr, *instr);
15466 	    if (p != NULL)
15467 		ga_append(&ga, tostr[p - fromstr]);
15468 	    else
15469 		ga_append(&ga, *instr);
15470 	    ++instr;
15471 	}
15472     }
15473 
15474     rettv->vval.v_string = ga.ga_data;
15475 }
15476 
15477 /*
15478  * "type(expr)" function
15479  */
15480     static void
15481 f_type(argvars, rettv)
15482     typval_T	*argvars;
15483     typval_T	*rettv;
15484 {
15485     int n;
15486 
15487     switch (argvars[0].v_type)
15488     {
15489 	case VAR_NUMBER: n = 0; break;
15490 	case VAR_STRING: n = 1; break;
15491 	case VAR_FUNC:   n = 2; break;
15492 	case VAR_LIST:   n = 3; break;
15493 	case VAR_DICT:   n = 4; break;
15494 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
15495     }
15496     rettv->vval.v_number = n;
15497 }
15498 
15499 /*
15500  * "values(dict)" function
15501  */
15502     static void
15503 f_values(argvars, rettv)
15504     typval_T	*argvars;
15505     typval_T	*rettv;
15506 {
15507     dict_list(argvars, rettv, 1);
15508 }
15509 
15510 /*
15511  * "virtcol(string)" function
15512  */
15513     static void
15514 f_virtcol(argvars, rettv)
15515     typval_T	*argvars;
15516     typval_T	*rettv;
15517 {
15518     colnr_T	vcol = 0;
15519     pos_T	*fp;
15520     int		fnum = curbuf->b_fnum;
15521 
15522     fp = var2fpos(&argvars[0], FALSE, &fnum);
15523     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count
15524 						    && fnum == curbuf->b_fnum)
15525     {
15526 	getvvcol(curwin, fp, NULL, NULL, &vcol);
15527 	++vcol;
15528     }
15529 
15530     rettv->vval.v_number = vcol;
15531 }
15532 
15533 /*
15534  * "visualmode()" function
15535  */
15536 /*ARGSUSED*/
15537     static void
15538 f_visualmode(argvars, rettv)
15539     typval_T	*argvars;
15540     typval_T	*rettv;
15541 {
15542 #ifdef FEAT_VISUAL
15543     char_u	str[2];
15544 
15545     rettv->v_type = VAR_STRING;
15546     str[0] = curbuf->b_visual_mode_eval;
15547     str[1] = NUL;
15548     rettv->vval.v_string = vim_strsave(str);
15549 
15550     /* A non-zero number or non-empty string argument: reset mode. */
15551     if ((argvars[0].v_type == VAR_NUMBER
15552 		&& argvars[0].vval.v_number != 0)
15553 	    || (argvars[0].v_type == VAR_STRING
15554 		&& *get_tv_string(&argvars[0]) != NUL))
15555 	curbuf->b_visual_mode_eval = NUL;
15556 #else
15557     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
15558 #endif
15559 }
15560 
15561 /*
15562  * "winbufnr(nr)" function
15563  */
15564     static void
15565 f_winbufnr(argvars, rettv)
15566     typval_T	*argvars;
15567     typval_T	*rettv;
15568 {
15569     win_T	*wp;
15570 
15571     wp = find_win_by_nr(&argvars[0]);
15572     if (wp == NULL)
15573 	rettv->vval.v_number = -1;
15574     else
15575 	rettv->vval.v_number = wp->w_buffer->b_fnum;
15576 }
15577 
15578 /*
15579  * "wincol()" function
15580  */
15581 /*ARGSUSED*/
15582     static void
15583 f_wincol(argvars, rettv)
15584     typval_T	*argvars;
15585     typval_T	*rettv;
15586 {
15587     validate_cursor();
15588     rettv->vval.v_number = curwin->w_wcol + 1;
15589 }
15590 
15591 /*
15592  * "winheight(nr)" function
15593  */
15594     static void
15595 f_winheight(argvars, rettv)
15596     typval_T	*argvars;
15597     typval_T	*rettv;
15598 {
15599     win_T	*wp;
15600 
15601     wp = find_win_by_nr(&argvars[0]);
15602     if (wp == NULL)
15603 	rettv->vval.v_number = -1;
15604     else
15605 	rettv->vval.v_number = wp->w_height;
15606 }
15607 
15608 /*
15609  * "winline()" function
15610  */
15611 /*ARGSUSED*/
15612     static void
15613 f_winline(argvars, rettv)
15614     typval_T	*argvars;
15615     typval_T	*rettv;
15616 {
15617     validate_cursor();
15618     rettv->vval.v_number = curwin->w_wrow + 1;
15619 }
15620 
15621 /*
15622  * "winnr()" function
15623  */
15624 /* ARGSUSED */
15625     static void
15626 f_winnr(argvars, rettv)
15627     typval_T	*argvars;
15628     typval_T	*rettv;
15629 {
15630     int		nr = 1;
15631 
15632 #ifdef FEAT_WINDOWS
15633     nr = get_winnr(curtab, &argvars[0]);
15634 #endif
15635     rettv->vval.v_number = nr;
15636 }
15637 
15638 /*
15639  * "winrestcmd()" function
15640  */
15641 /* ARGSUSED */
15642     static void
15643 f_winrestcmd(argvars, rettv)
15644     typval_T	*argvars;
15645     typval_T	*rettv;
15646 {
15647 #ifdef FEAT_WINDOWS
15648     win_T	*wp;
15649     int		winnr = 1;
15650     garray_T	ga;
15651     char_u	buf[50];
15652 
15653     ga_init2(&ga, (int)sizeof(char), 70);
15654     for (wp = firstwin; wp != NULL; wp = wp->w_next)
15655     {
15656 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
15657 	ga_concat(&ga, buf);
15658 # ifdef FEAT_VERTSPLIT
15659 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
15660 	ga_concat(&ga, buf);
15661 # endif
15662 	++winnr;
15663     }
15664     ga_append(&ga, NUL);
15665 
15666     rettv->vval.v_string = ga.ga_data;
15667 #else
15668     rettv->vval.v_string = NULL;
15669 #endif
15670     rettv->v_type = VAR_STRING;
15671 }
15672 
15673 /*
15674  * "winrestview()" function
15675  */
15676 /* ARGSUSED */
15677     static void
15678 f_winrestview(argvars, rettv)
15679     typval_T	*argvars;
15680     typval_T	*rettv;
15681 {
15682     dict_T	*dict;
15683 
15684     if (argvars[0].v_type != VAR_DICT
15685 	    || (dict = argvars[0].vval.v_dict) == NULL)
15686 	EMSG(_(e_invarg));
15687     else
15688     {
15689 	curwin->w_cursor.lnum = get_dict_number(dict, (char_u *)"lnum");
15690 	curwin->w_cursor.col = get_dict_number(dict, (char_u *)"col");
15691 #ifdef FEAT_VIRTUALEDIT
15692 	curwin->w_cursor.coladd = get_dict_number(dict, (char_u *)"coladd");
15693 #endif
15694 	curwin->w_curswant = get_dict_number(dict, (char_u *)"curswant");
15695 	curwin->w_set_curswant = FALSE;
15696 
15697 	curwin->w_topline = get_dict_number(dict, (char_u *)"topline");
15698 #ifdef FEAT_DIFF
15699 	curwin->w_topfill = get_dict_number(dict, (char_u *)"topfill");
15700 #endif
15701 	curwin->w_leftcol = get_dict_number(dict, (char_u *)"leftcol");
15702 	curwin->w_skipcol = get_dict_number(dict, (char_u *)"skipcol");
15703 
15704 	check_cursor();
15705 	changed_cline_bef_curs();
15706 	invalidate_botline();
15707 	redraw_later(VALID);
15708 
15709 	if (curwin->w_topline == 0)
15710 	    curwin->w_topline = 1;
15711 	if (curwin->w_topline > curbuf->b_ml.ml_line_count)
15712 	    curwin->w_topline = curbuf->b_ml.ml_line_count;
15713 #ifdef FEAT_DIFF
15714 	check_topfill(curwin, TRUE);
15715 #endif
15716     }
15717 }
15718 
15719 /*
15720  * "winsaveview()" function
15721  */
15722 /* ARGSUSED */
15723     static void
15724 f_winsaveview(argvars, rettv)
15725     typval_T	*argvars;
15726     typval_T	*rettv;
15727 {
15728     dict_T	*dict;
15729 
15730     dict = dict_alloc();
15731     if (dict == NULL)
15732 	return;
15733     rettv->v_type = VAR_DICT;
15734     rettv->vval.v_dict = dict;
15735     ++dict->dv_refcount;
15736 
15737     dict_add_nr_str(dict, "lnum", (long)curwin->w_cursor.lnum, NULL);
15738     dict_add_nr_str(dict, "col", (long)curwin->w_cursor.col, NULL);
15739 #ifdef FEAT_VIRTUALEDIT
15740     dict_add_nr_str(dict, "coladd", (long)curwin->w_cursor.coladd, NULL);
15741 #endif
15742     dict_add_nr_str(dict, "curswant", (long)curwin->w_curswant, NULL);
15743 
15744     dict_add_nr_str(dict, "topline", (long)curwin->w_topline, NULL);
15745 #ifdef FEAT_DIFF
15746     dict_add_nr_str(dict, "topfill", (long)curwin->w_topfill, NULL);
15747 #endif
15748     dict_add_nr_str(dict, "leftcol", (long)curwin->w_leftcol, NULL);
15749     dict_add_nr_str(dict, "skipcol", (long)curwin->w_skipcol, NULL);
15750 }
15751 
15752 /*
15753  * "winwidth(nr)" function
15754  */
15755     static void
15756 f_winwidth(argvars, rettv)
15757     typval_T	*argvars;
15758     typval_T	*rettv;
15759 {
15760     win_T	*wp;
15761 
15762     wp = find_win_by_nr(&argvars[0]);
15763     if (wp == NULL)
15764 	rettv->vval.v_number = -1;
15765     else
15766 #ifdef FEAT_VERTSPLIT
15767 	rettv->vval.v_number = wp->w_width;
15768 #else
15769 	rettv->vval.v_number = Columns;
15770 #endif
15771 }
15772 
15773 /*
15774  * "writefile()" function
15775  */
15776     static void
15777 f_writefile(argvars, rettv)
15778     typval_T	*argvars;
15779     typval_T	*rettv;
15780 {
15781     int		binary = FALSE;
15782     char_u	*fname;
15783     FILE	*fd;
15784     listitem_T	*li;
15785     char_u	*s;
15786     int		ret = 0;
15787     int		c;
15788 
15789     if (argvars[0].v_type != VAR_LIST)
15790     {
15791 	EMSG2(_(e_listarg), "writefile()");
15792 	return;
15793     }
15794     if (argvars[0].vval.v_list == NULL)
15795 	return;
15796 
15797     if (argvars[2].v_type != VAR_UNKNOWN
15798 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
15799 	binary = TRUE;
15800 
15801     /* Always open the file in binary mode, library functions have a mind of
15802      * their own about CR-LF conversion. */
15803     fname = get_tv_string(&argvars[1]);
15804     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
15805     {
15806 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
15807 	ret = -1;
15808     }
15809     else
15810     {
15811 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
15812 							     li = li->li_next)
15813 	{
15814 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
15815 	    {
15816 		if (*s == '\n')
15817 		    c = putc(NUL, fd);
15818 		else
15819 		    c = putc(*s, fd);
15820 		if (c == EOF)
15821 		{
15822 		    ret = -1;
15823 		    break;
15824 		}
15825 	    }
15826 	    if (!binary || li->li_next != NULL)
15827 		if (putc('\n', fd) == EOF)
15828 		{
15829 		    ret = -1;
15830 		    break;
15831 		}
15832 	    if (ret < 0)
15833 	    {
15834 		EMSG(_(e_write));
15835 		break;
15836 	    }
15837 	}
15838 	fclose(fd);
15839     }
15840 
15841     rettv->vval.v_number = ret;
15842 }
15843 
15844 /*
15845  * Translate a String variable into a position.
15846  * Returns NULL when there is an error.
15847  */
15848     static pos_T *
15849 var2fpos(varp, lnum, fnum)
15850     typval_T	*varp;
15851     int		lnum;		/* TRUE when $ is last line */
15852     int		*fnum;		/* set to fnum for '0, 'A, etc. */
15853 {
15854     char_u		*name;
15855     static pos_T	pos;
15856     pos_T		*pp;
15857 
15858     /* Argument can be [lnum, col, coladd]. */
15859     if (varp->v_type == VAR_LIST)
15860     {
15861 	list_T		*l;
15862 	int		len;
15863 	int		error = FALSE;
15864 
15865 	l = varp->vval.v_list;
15866 	if (l == NULL)
15867 	    return NULL;
15868 
15869 	/* Get the line number */
15870 	pos.lnum = list_find_nr(l, 0L, &error);
15871 	if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
15872 	    return NULL;	/* invalid line number */
15873 
15874 	/* Get the column number */
15875 	pos.col = list_find_nr(l, 1L, &error);
15876 	if (error)
15877 	    return NULL;
15878 	len = (long)STRLEN(ml_get(pos.lnum));
15879 	/* Accept a position up to the NUL after the line. */
15880 	if (pos.col <= 0 || (int)pos.col > len + 1)
15881 	    return NULL;	/* invalid column number */
15882 	--pos.col;
15883 
15884 #ifdef FEAT_VIRTUALEDIT
15885 	/* Get the virtual offset.  Defaults to zero. */
15886 	pos.coladd = list_find_nr(l, 2L, &error);
15887 	if (error)
15888 	    pos.coladd = 0;
15889 #endif
15890 
15891 	return &pos;
15892     }
15893 
15894     name = get_tv_string_chk(varp);
15895     if (name == NULL)
15896 	return NULL;
15897     if (name[0] == '.')		/* cursor */
15898 	return &curwin->w_cursor;
15899     if (name[0] == '\'')	/* mark */
15900     {
15901 	pp = getmark_fnum(name[1], FALSE, fnum);
15902 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
15903 	    return NULL;
15904 	return pp;
15905     }
15906 
15907 #ifdef FEAT_VIRTUALEDIT
15908     pos.coladd = 0;
15909 #endif
15910 
15911     if (name[0] == 'w' && lnum)
15912     {
15913 	pos.col = 0;
15914 	if (name[1] == '0')		/* "w0": first visible line */
15915 	{
15916 	    update_topline();
15917 	    pos.lnum = curwin->w_topline;
15918 	    return &pos;
15919 	}
15920 	else if (name[1] == '$')	/* "w$": last visible line */
15921 	{
15922 	    validate_botline();
15923 	    pos.lnum = curwin->w_botline - 1;
15924 	    return &pos;
15925 	}
15926     }
15927     else if (name[0] == '$')		/* last column or line */
15928     {
15929 	if (lnum)
15930 	{
15931 	    pos.lnum = curbuf->b_ml.ml_line_count;
15932 	    pos.col = 0;
15933 	}
15934 	else
15935 	{
15936 	    pos.lnum = curwin->w_cursor.lnum;
15937 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
15938 	}
15939 	return &pos;
15940     }
15941     return NULL;
15942 }
15943 
15944 /*
15945  * Convert list in "arg" into a position and optional file number.
15946  * When "fnump" is NULL there is no file number, only 3 items.
15947  * Note that the column is passed on as-is, the caller may want to decrement
15948  * it to use 1 for the first column.
15949  * Return FAIL when conversion is not possible, doesn't check the position for
15950  * validity.
15951  */
15952     static int
15953 list2fpos(arg, posp, fnump)
15954     typval_T	*arg;
15955     pos_T	*posp;
15956     int		*fnump;
15957 {
15958     list_T	*l = arg->vval.v_list;
15959     long	i = 0;
15960     long	n;
15961 
15962     /* List must be: [fnum, lnum, col, coladd] */
15963     if (arg->v_type != VAR_LIST || l == NULL
15964 				      || l->lv_len != (fnump == NULL ? 3 : 4))
15965 	return FAIL;
15966 
15967     if (fnump != NULL)
15968     {
15969 	n = list_find_nr(l, i++, NULL);	/* fnum */
15970 	if (n < 0)
15971 	    return FAIL;
15972 	if (n == 0)
15973 	    n = curbuf->b_fnum;		/* current buffer */
15974 	*fnump = n;
15975     }
15976 
15977     n = list_find_nr(l, i++, NULL);	/* lnum */
15978     if (n < 0)
15979 	return FAIL;
15980     posp->lnum = n;
15981 
15982     n = list_find_nr(l, i++, NULL);	/* col */
15983     if (n < 0)
15984 	return FAIL;
15985     posp->col = n;
15986 
15987 #ifdef FEAT_VIRTUALEDIT
15988     n = list_find_nr(l, i, NULL);
15989     if (n < 0)
15990 	return FAIL;
15991     posp->coladd = n;
15992 #endif
15993 
15994     return OK;
15995 }
15996 
15997 /*
15998  * Get the length of an environment variable name.
15999  * Advance "arg" to the first character after the name.
16000  * Return 0 for error.
16001  */
16002     static int
16003 get_env_len(arg)
16004     char_u	**arg;
16005 {
16006     char_u	*p;
16007     int		len;
16008 
16009     for (p = *arg; vim_isIDc(*p); ++p)
16010 	;
16011     if (p == *arg)	    /* no name found */
16012 	return 0;
16013 
16014     len = (int)(p - *arg);
16015     *arg = p;
16016     return len;
16017 }
16018 
16019 /*
16020  * Get the length of the name of a function or internal variable.
16021  * "arg" is advanced to the first non-white character after the name.
16022  * Return 0 if something is wrong.
16023  */
16024     static int
16025 get_id_len(arg)
16026     char_u	**arg;
16027 {
16028     char_u	*p;
16029     int		len;
16030 
16031     /* Find the end of the name. */
16032     for (p = *arg; eval_isnamec(*p); ++p)
16033 	;
16034     if (p == *arg)	    /* no name found */
16035 	return 0;
16036 
16037     len = (int)(p - *arg);
16038     *arg = skipwhite(p);
16039 
16040     return len;
16041 }
16042 
16043 /*
16044  * Get the length of the name of a variable or function.
16045  * Only the name is recognized, does not handle ".key" or "[idx]".
16046  * "arg" is advanced to the first non-white character after the name.
16047  * Return -1 if curly braces expansion failed.
16048  * Return 0 if something else is wrong.
16049  * If the name contains 'magic' {}'s, expand them and return the
16050  * expanded name in an allocated string via 'alias' - caller must free.
16051  */
16052     static int
16053 get_name_len(arg, alias, evaluate, verbose)
16054     char_u	**arg;
16055     char_u	**alias;
16056     int		evaluate;
16057     int		verbose;
16058 {
16059     int		len;
16060     char_u	*p;
16061     char_u	*expr_start;
16062     char_u	*expr_end;
16063 
16064     *alias = NULL;  /* default to no alias */
16065 
16066     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
16067 						  && (*arg)[2] == (int)KE_SNR)
16068     {
16069 	/* hard coded <SNR>, already translated */
16070 	*arg += 3;
16071 	return get_id_len(arg) + 3;
16072     }
16073     len = eval_fname_script(*arg);
16074     if (len > 0)
16075     {
16076 	/* literal "<SID>", "s:" or "<SNR>" */
16077 	*arg += len;
16078     }
16079 
16080     /*
16081      * Find the end of the name; check for {} construction.
16082      */
16083     p = find_name_end(*arg, &expr_start, &expr_end,
16084 					       len > 0 ? 0 : FNE_CHECK_START);
16085     if (expr_start != NULL)
16086     {
16087 	char_u	*temp_string;
16088 
16089 	if (!evaluate)
16090 	{
16091 	    len += (int)(p - *arg);
16092 	    *arg = skipwhite(p);
16093 	    return len;
16094 	}
16095 
16096 	/*
16097 	 * Include any <SID> etc in the expanded string:
16098 	 * Thus the -len here.
16099 	 */
16100 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
16101 	if (temp_string == NULL)
16102 	    return -1;
16103 	*alias = temp_string;
16104 	*arg = skipwhite(p);
16105 	return (int)STRLEN(temp_string);
16106     }
16107 
16108     len += get_id_len(arg);
16109     if (len == 0 && verbose)
16110 	EMSG2(_(e_invexpr2), *arg);
16111 
16112     return len;
16113 }
16114 
16115 /*
16116  * Find the end of a variable or function name, taking care of magic braces.
16117  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
16118  * start and end of the first magic braces item.
16119  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
16120  * Return a pointer to just after the name.  Equal to "arg" if there is no
16121  * valid name.
16122  */
16123     static char_u *
16124 find_name_end(arg, expr_start, expr_end, flags)
16125     char_u	*arg;
16126     char_u	**expr_start;
16127     char_u	**expr_end;
16128     int		flags;
16129 {
16130     int		mb_nest = 0;
16131     int		br_nest = 0;
16132     char_u	*p;
16133 
16134     if (expr_start != NULL)
16135     {
16136 	*expr_start = NULL;
16137 	*expr_end = NULL;
16138     }
16139 
16140     /* Quick check for valid starting character. */
16141     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
16142 	return arg;
16143 
16144     for (p = arg; *p != NUL
16145 		    && (eval_isnamec(*p)
16146 			|| *p == '{'
16147 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
16148 			|| mb_nest != 0
16149 			|| br_nest != 0); mb_ptr_adv(p))
16150     {
16151 	if (*p == '\'')
16152 	{
16153 	    /* skip over 'string' to avoid counting [ and ] inside it. */
16154 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
16155 		;
16156 	    if (*p == NUL)
16157 		break;
16158 	}
16159 	else if (*p == '"')
16160 	{
16161 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
16162 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
16163 		if (*p == '\\' && p[1] != NUL)
16164 		    ++p;
16165 	    if (*p == NUL)
16166 		break;
16167 	}
16168 
16169 	if (mb_nest == 0)
16170 	{
16171 	    if (*p == '[')
16172 		++br_nest;
16173 	    else if (*p == ']')
16174 		--br_nest;
16175 	}
16176 
16177 	if (br_nest == 0)
16178 	{
16179 	    if (*p == '{')
16180 	    {
16181 		mb_nest++;
16182 		if (expr_start != NULL && *expr_start == NULL)
16183 		    *expr_start = p;
16184 	    }
16185 	    else if (*p == '}')
16186 	    {
16187 		mb_nest--;
16188 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
16189 		    *expr_end = p;
16190 	    }
16191 	}
16192     }
16193 
16194     return p;
16195 }
16196 
16197 /*
16198  * Expands out the 'magic' {}'s in a variable/function name.
16199  * Note that this can call itself recursively, to deal with
16200  * constructs like foo{bar}{baz}{bam}
16201  * The four pointer arguments point to "foo{expre}ss{ion}bar"
16202  *			"in_start"      ^
16203  *			"expr_start"	   ^
16204  *			"expr_end"		 ^
16205  *			"in_end"			    ^
16206  *
16207  * Returns a new allocated string, which the caller must free.
16208  * Returns NULL for failure.
16209  */
16210     static char_u *
16211 make_expanded_name(in_start, expr_start, expr_end, in_end)
16212     char_u	*in_start;
16213     char_u	*expr_start;
16214     char_u	*expr_end;
16215     char_u	*in_end;
16216 {
16217     char_u	c1;
16218     char_u	*retval = NULL;
16219     char_u	*temp_result;
16220     char_u	*nextcmd = NULL;
16221 
16222     if (expr_end == NULL || in_end == NULL)
16223 	return NULL;
16224     *expr_start	= NUL;
16225     *expr_end = NUL;
16226     c1 = *in_end;
16227     *in_end = NUL;
16228 
16229     temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
16230     if (temp_result != NULL && nextcmd == NULL)
16231     {
16232 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
16233 						   + (in_end - expr_end) + 1));
16234 	if (retval != NULL)
16235 	{
16236 	    STRCPY(retval, in_start);
16237 	    STRCAT(retval, temp_result);
16238 	    STRCAT(retval, expr_end + 1);
16239 	}
16240     }
16241     vim_free(temp_result);
16242 
16243     *in_end = c1;		/* put char back for error messages */
16244     *expr_start = '{';
16245     *expr_end = '}';
16246 
16247     if (retval != NULL)
16248     {
16249 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
16250 	if (expr_start != NULL)
16251 	{
16252 	    /* Further expansion! */
16253 	    temp_result = make_expanded_name(retval, expr_start,
16254 						       expr_end, temp_result);
16255 	    vim_free(retval);
16256 	    retval = temp_result;
16257 	}
16258     }
16259 
16260     return retval;
16261 }
16262 
16263 /*
16264  * Return TRUE if character "c" can be used in a variable or function name.
16265  * Does not include '{' or '}' for magic braces.
16266  */
16267     static int
16268 eval_isnamec(c)
16269     int	    c;
16270 {
16271     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
16272 }
16273 
16274 /*
16275  * Return TRUE if character "c" can be used as the first character in a
16276  * variable or function name (excluding '{' and '}').
16277  */
16278     static int
16279 eval_isnamec1(c)
16280     int	    c;
16281 {
16282     return (ASCII_ISALPHA(c) || c == '_');
16283 }
16284 
16285 /*
16286  * Set number v: variable to "val".
16287  */
16288     void
16289 set_vim_var_nr(idx, val)
16290     int		idx;
16291     long	val;
16292 {
16293     vimvars[idx].vv_nr = val;
16294 }
16295 
16296 /*
16297  * Get number v: variable value.
16298  */
16299     long
16300 get_vim_var_nr(idx)
16301     int		idx;
16302 {
16303     return vimvars[idx].vv_nr;
16304 }
16305 
16306 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16307 /*
16308  * Get string v: variable value.  Uses a static buffer, can only be used once.
16309  */
16310     char_u *
16311 get_vim_var_str(idx)
16312     int		idx;
16313 {
16314     return get_tv_string(&vimvars[idx].vv_tv);
16315 }
16316 #endif
16317 
16318 /*
16319  * Set v:count, v:count1 and v:prevcount.
16320  */
16321     void
16322 set_vcount(count, count1)
16323     long	count;
16324     long	count1;
16325 {
16326     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
16327     vimvars[VV_COUNT].vv_nr = count;
16328     vimvars[VV_COUNT1].vv_nr = count1;
16329 }
16330 
16331 /*
16332  * Set string v: variable to a copy of "val".
16333  */
16334     void
16335 set_vim_var_string(idx, val, len)
16336     int		idx;
16337     char_u	*val;
16338     int		len;	    /* length of "val" to use or -1 (whole string) */
16339 {
16340     /* Need to do this (at least) once, since we can't initialize a union.
16341      * Will always be invoked when "v:progname" is set. */
16342     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
16343 
16344     vim_free(vimvars[idx].vv_str);
16345     if (val == NULL)
16346 	vimvars[idx].vv_str = NULL;
16347     else if (len == -1)
16348 	vimvars[idx].vv_str = vim_strsave(val);
16349     else
16350 	vimvars[idx].vv_str = vim_strnsave(val, len);
16351 }
16352 
16353 /*
16354  * Set v:register if needed.
16355  */
16356     void
16357 set_reg_var(c)
16358     int		c;
16359 {
16360     char_u	regname;
16361 
16362     if (c == 0 || c == ' ')
16363 	regname = '"';
16364     else
16365 	regname = c;
16366     /* Avoid free/alloc when the value is already right. */
16367     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
16368 	set_vim_var_string(VV_REG, &regname, 1);
16369 }
16370 
16371 /*
16372  * Get or set v:exception.  If "oldval" == NULL, return the current value.
16373  * Otherwise, restore the value to "oldval" and return NULL.
16374  * Must always be called in pairs to save and restore v:exception!  Does not
16375  * take care of memory allocations.
16376  */
16377     char_u *
16378 v_exception(oldval)
16379     char_u	*oldval;
16380 {
16381     if (oldval == NULL)
16382 	return vimvars[VV_EXCEPTION].vv_str;
16383 
16384     vimvars[VV_EXCEPTION].vv_str = oldval;
16385     return NULL;
16386 }
16387 
16388 /*
16389  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
16390  * Otherwise, restore the value to "oldval" and return NULL.
16391  * Must always be called in pairs to save and restore v:throwpoint!  Does not
16392  * take care of memory allocations.
16393  */
16394     char_u *
16395 v_throwpoint(oldval)
16396     char_u	*oldval;
16397 {
16398     if (oldval == NULL)
16399 	return vimvars[VV_THROWPOINT].vv_str;
16400 
16401     vimvars[VV_THROWPOINT].vv_str = oldval;
16402     return NULL;
16403 }
16404 
16405 #if defined(FEAT_AUTOCMD) || defined(PROTO)
16406 /*
16407  * Set v:cmdarg.
16408  * If "eap" != NULL, use "eap" to generate the value and return the old value.
16409  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
16410  * Must always be called in pairs!
16411  */
16412     char_u *
16413 set_cmdarg(eap, oldarg)
16414     exarg_T	*eap;
16415     char_u	*oldarg;
16416 {
16417     char_u	*oldval;
16418     char_u	*newval;
16419     unsigned	len;
16420 
16421     oldval = vimvars[VV_CMDARG].vv_str;
16422     if (eap == NULL)
16423     {
16424 	vim_free(oldval);
16425 	vimvars[VV_CMDARG].vv_str = oldarg;
16426 	return NULL;
16427     }
16428 
16429     if (eap->force_bin == FORCE_BIN)
16430 	len = 6;
16431     else if (eap->force_bin == FORCE_NOBIN)
16432 	len = 8;
16433     else
16434 	len = 0;
16435     if (eap->force_ff != 0)
16436 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
16437 # ifdef FEAT_MBYTE
16438     if (eap->force_enc != 0)
16439 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
16440     if (eap->bad_char != 0)
16441 	len += (unsigned)STRLEN(eap->cmd + eap->bad_char) + 7;
16442 # endif
16443 
16444     newval = alloc(len + 1);
16445     if (newval == NULL)
16446 	return NULL;
16447 
16448     if (eap->force_bin == FORCE_BIN)
16449 	sprintf((char *)newval, " ++bin");
16450     else if (eap->force_bin == FORCE_NOBIN)
16451 	sprintf((char *)newval, " ++nobin");
16452     else
16453 	*newval = NUL;
16454     if (eap->force_ff != 0)
16455 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
16456 						eap->cmd + eap->force_ff);
16457 # ifdef FEAT_MBYTE
16458     if (eap->force_enc != 0)
16459 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
16460 					       eap->cmd + eap->force_enc);
16461     if (eap->bad_char != 0)
16462 	sprintf((char *)newval + STRLEN(newval), " ++bad=%s",
16463 					       eap->cmd + eap->bad_char);
16464 # endif
16465     vimvars[VV_CMDARG].vv_str = newval;
16466     return oldval;
16467 }
16468 #endif
16469 
16470 /*
16471  * Get the value of internal variable "name".
16472  * Return OK or FAIL.
16473  */
16474     static int
16475 get_var_tv(name, len, rettv, verbose)
16476     char_u	*name;
16477     int		len;		/* length of "name" */
16478     typval_T	*rettv;		/* NULL when only checking existence */
16479     int		verbose;	/* may give error message */
16480 {
16481     int		ret = OK;
16482     typval_T	*tv = NULL;
16483     typval_T	atv;
16484     dictitem_T	*v;
16485     int		cc;
16486 
16487     /* truncate the name, so that we can use strcmp() */
16488     cc = name[len];
16489     name[len] = NUL;
16490 
16491     /*
16492      * Check for "b:changedtick".
16493      */
16494     if (STRCMP(name, "b:changedtick") == 0)
16495     {
16496 	atv.v_type = VAR_NUMBER;
16497 	atv.vval.v_number = curbuf->b_changedtick;
16498 	tv = &atv;
16499     }
16500 
16501     /*
16502      * Check for user-defined variables.
16503      */
16504     else
16505     {
16506 	v = find_var(name, NULL);
16507 	if (v != NULL)
16508 	    tv = &v->di_tv;
16509     }
16510 
16511     if (tv == NULL)
16512     {
16513 	if (rettv != NULL && verbose)
16514 	    EMSG2(_(e_undefvar), name);
16515 	ret = FAIL;
16516     }
16517     else if (rettv != NULL)
16518 	copy_tv(tv, rettv);
16519 
16520     name[len] = cc;
16521 
16522     return ret;
16523 }
16524 
16525 /*
16526  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
16527  * Also handle function call with Funcref variable: func(expr)
16528  * Can all be combined: dict.func(expr)[idx]['func'](expr)
16529  */
16530     static int
16531 handle_subscript(arg, rettv, evaluate, verbose)
16532     char_u	**arg;
16533     typval_T	*rettv;
16534     int		evaluate;	/* do more than finding the end */
16535     int		verbose;	/* give error messages */
16536 {
16537     int		ret = OK;
16538     dict_T	*selfdict = NULL;
16539     char_u	*s;
16540     int		len;
16541     typval_T	functv;
16542 
16543     while (ret == OK
16544 	    && (**arg == '['
16545 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
16546 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
16547 	    && !vim_iswhite(*(*arg - 1)))
16548     {
16549 	if (**arg == '(')
16550 	{
16551 	    /* need to copy the funcref so that we can clear rettv */
16552 	    functv = *rettv;
16553 	    rettv->v_type = VAR_UNKNOWN;
16554 
16555 	    /* Invoke the function.  Recursive! */
16556 	    s = functv.vval.v_string;
16557 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
16558 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
16559 			&len, evaluate, selfdict);
16560 
16561 	    /* Clear the funcref afterwards, so that deleting it while
16562 	     * evaluating the arguments is possible (see test55). */
16563 	    clear_tv(&functv);
16564 
16565 	    /* Stop the expression evaluation when immediately aborting on
16566 	     * error, or when an interrupt occurred or an exception was thrown
16567 	     * but not caught. */
16568 	    if (aborting())
16569 	    {
16570 		if (ret == OK)
16571 		    clear_tv(rettv);
16572 		ret = FAIL;
16573 	    }
16574 	    dict_unref(selfdict);
16575 	    selfdict = NULL;
16576 	}
16577 	else /* **arg == '[' || **arg == '.' */
16578 	{
16579 	    dict_unref(selfdict);
16580 	    if (rettv->v_type == VAR_DICT)
16581 	    {
16582 		selfdict = rettv->vval.v_dict;
16583 		if (selfdict != NULL)
16584 		    ++selfdict->dv_refcount;
16585 	    }
16586 	    else
16587 		selfdict = NULL;
16588 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
16589 	    {
16590 		clear_tv(rettv);
16591 		ret = FAIL;
16592 	    }
16593 	}
16594     }
16595     dict_unref(selfdict);
16596     return ret;
16597 }
16598 
16599 /*
16600  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
16601  * value).
16602  */
16603     static typval_T *
16604 alloc_tv()
16605 {
16606     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
16607 }
16608 
16609 /*
16610  * Allocate memory for a variable type-value, and assign a string to it.
16611  * The string "s" must have been allocated, it is consumed.
16612  * Return NULL for out of memory, the variable otherwise.
16613  */
16614     static typval_T *
16615 alloc_string_tv(s)
16616     char_u	*s;
16617 {
16618     typval_T	*rettv;
16619 
16620     rettv = alloc_tv();
16621     if (rettv != NULL)
16622     {
16623 	rettv->v_type = VAR_STRING;
16624 	rettv->vval.v_string = s;
16625     }
16626     else
16627 	vim_free(s);
16628     return rettv;
16629 }
16630 
16631 /*
16632  * Free the memory for a variable type-value.
16633  */
16634     void
16635 free_tv(varp)
16636     typval_T *varp;
16637 {
16638     if (varp != NULL)
16639     {
16640 	switch (varp->v_type)
16641 	{
16642 	    case VAR_FUNC:
16643 		func_unref(varp->vval.v_string);
16644 		/*FALLTHROUGH*/
16645 	    case VAR_STRING:
16646 		vim_free(varp->vval.v_string);
16647 		break;
16648 	    case VAR_LIST:
16649 		list_unref(varp->vval.v_list);
16650 		break;
16651 	    case VAR_DICT:
16652 		dict_unref(varp->vval.v_dict);
16653 		break;
16654 	    case VAR_NUMBER:
16655 	    case VAR_UNKNOWN:
16656 		break;
16657 	    default:
16658 		EMSG2(_(e_intern2), "free_tv()");
16659 		break;
16660 	}
16661 	vim_free(varp);
16662     }
16663 }
16664 
16665 /*
16666  * Free the memory for a variable value and set the value to NULL or 0.
16667  */
16668     void
16669 clear_tv(varp)
16670     typval_T *varp;
16671 {
16672     if (varp != NULL)
16673     {
16674 	switch (varp->v_type)
16675 	{
16676 	    case VAR_FUNC:
16677 		func_unref(varp->vval.v_string);
16678 		/*FALLTHROUGH*/
16679 	    case VAR_STRING:
16680 		vim_free(varp->vval.v_string);
16681 		varp->vval.v_string = NULL;
16682 		break;
16683 	    case VAR_LIST:
16684 		list_unref(varp->vval.v_list);
16685 		varp->vval.v_list = NULL;
16686 		break;
16687 	    case VAR_DICT:
16688 		dict_unref(varp->vval.v_dict);
16689 		varp->vval.v_dict = NULL;
16690 		break;
16691 	    case VAR_NUMBER:
16692 		varp->vval.v_number = 0;
16693 		break;
16694 	    case VAR_UNKNOWN:
16695 		break;
16696 	    default:
16697 		EMSG2(_(e_intern2), "clear_tv()");
16698 	}
16699 	varp->v_lock = 0;
16700     }
16701 }
16702 
16703 /*
16704  * Set the value of a variable to NULL without freeing items.
16705  */
16706     static void
16707 init_tv(varp)
16708     typval_T *varp;
16709 {
16710     if (varp != NULL)
16711 	vim_memset(varp, 0, sizeof(typval_T));
16712 }
16713 
16714 /*
16715  * Get the number value of a variable.
16716  * If it is a String variable, uses vim_str2nr().
16717  * For incompatible types, return 0.
16718  * get_tv_number_chk() is similar to get_tv_number(), but informs the
16719  * caller of incompatible types: it sets *denote to TRUE if "denote"
16720  * is not NULL or returns -1 otherwise.
16721  */
16722     static long
16723 get_tv_number(varp)
16724     typval_T	*varp;
16725 {
16726     int		error = FALSE;
16727 
16728     return get_tv_number_chk(varp, &error);	/* return 0L on error */
16729 }
16730 
16731     long
16732 get_tv_number_chk(varp, denote)
16733     typval_T	*varp;
16734     int		*denote;
16735 {
16736     long	n = 0L;
16737 
16738     switch (varp->v_type)
16739     {
16740 	case VAR_NUMBER:
16741 	    return (long)(varp->vval.v_number);
16742 	case VAR_FUNC:
16743 	    EMSG(_("E703: Using a Funcref as a number"));
16744 	    break;
16745 	case VAR_STRING:
16746 	    if (varp->vval.v_string != NULL)
16747 		vim_str2nr(varp->vval.v_string, NULL, NULL,
16748 							TRUE, TRUE, &n, NULL);
16749 	    return n;
16750 	case VAR_LIST:
16751 	    EMSG(_("E745: Using a List as a number"));
16752 	    break;
16753 	case VAR_DICT:
16754 	    EMSG(_("E728: Using a Dictionary as a number"));
16755 	    break;
16756 	default:
16757 	    EMSG2(_(e_intern2), "get_tv_number()");
16758 	    break;
16759     }
16760     if (denote == NULL)		/* useful for values that must be unsigned */
16761 	n = -1;
16762     else
16763 	*denote = TRUE;
16764     return n;
16765 }
16766 
16767 /*
16768  * Get the lnum from the first argument.
16769  * Also accepts ".", "$", etc., but that only works for the current buffer.
16770  * Returns -1 on error.
16771  */
16772     static linenr_T
16773 get_tv_lnum(argvars)
16774     typval_T	*argvars;
16775 {
16776     typval_T	rettv;
16777     linenr_T	lnum;
16778 
16779     lnum = get_tv_number_chk(&argvars[0], NULL);
16780     if (lnum == 0)  /* no valid number, try using line() */
16781     {
16782 	rettv.v_type = VAR_NUMBER;
16783 	f_line(argvars, &rettv);
16784 	lnum = rettv.vval.v_number;
16785 	clear_tv(&rettv);
16786     }
16787     return lnum;
16788 }
16789 
16790 /*
16791  * Get the lnum from the first argument.
16792  * Also accepts "$", then "buf" is used.
16793  * Returns 0 on error.
16794  */
16795     static linenr_T
16796 get_tv_lnum_buf(argvars, buf)
16797     typval_T	*argvars;
16798     buf_T	*buf;
16799 {
16800     if (argvars[0].v_type == VAR_STRING
16801 	    && argvars[0].vval.v_string != NULL
16802 	    && argvars[0].vval.v_string[0] == '$'
16803 	    && buf != NULL)
16804 	return buf->b_ml.ml_line_count;
16805     return get_tv_number_chk(&argvars[0], NULL);
16806 }
16807 
16808 /*
16809  * Get the string value of a variable.
16810  * If it is a Number variable, the number is converted into a string.
16811  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
16812  * get_tv_string_buf() uses a given buffer.
16813  * If the String variable has never been set, return an empty string.
16814  * Never returns NULL;
16815  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
16816  * NULL on error.
16817  */
16818     static char_u *
16819 get_tv_string(varp)
16820     typval_T	*varp;
16821 {
16822     static char_u   mybuf[NUMBUFLEN];
16823 
16824     return get_tv_string_buf(varp, mybuf);
16825 }
16826 
16827     static char_u *
16828 get_tv_string_buf(varp, buf)
16829     typval_T	*varp;
16830     char_u	*buf;
16831 {
16832     char_u	*res =  get_tv_string_buf_chk(varp, buf);
16833 
16834     return res != NULL ? res : (char_u *)"";
16835 }
16836 
16837     char_u *
16838 get_tv_string_chk(varp)
16839     typval_T	*varp;
16840 {
16841     static char_u   mybuf[NUMBUFLEN];
16842 
16843     return get_tv_string_buf_chk(varp, mybuf);
16844 }
16845 
16846     static char_u *
16847 get_tv_string_buf_chk(varp, buf)
16848     typval_T	*varp;
16849     char_u	*buf;
16850 {
16851     switch (varp->v_type)
16852     {
16853 	case VAR_NUMBER:
16854 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
16855 	    return buf;
16856 	case VAR_FUNC:
16857 	    EMSG(_("E729: using Funcref as a String"));
16858 	    break;
16859 	case VAR_LIST:
16860 	    EMSG(_("E730: using List as a String"));
16861 	    break;
16862 	case VAR_DICT:
16863 	    EMSG(_("E731: using Dictionary as a String"));
16864 	    break;
16865 	case VAR_STRING:
16866 	    if (varp->vval.v_string != NULL)
16867 		return varp->vval.v_string;
16868 	    return (char_u *)"";
16869 	default:
16870 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
16871 	    break;
16872     }
16873     return NULL;
16874 }
16875 
16876 /*
16877  * Find variable "name" in the list of variables.
16878  * Return a pointer to it if found, NULL if not found.
16879  * Careful: "a:0" variables don't have a name.
16880  * When "htp" is not NULL we are writing to the variable, set "htp" to the
16881  * hashtab_T used.
16882  */
16883     static dictitem_T *
16884 find_var(name, htp)
16885     char_u	*name;
16886     hashtab_T	**htp;
16887 {
16888     char_u	*varname;
16889     hashtab_T	*ht;
16890 
16891     ht = find_var_ht(name, &varname);
16892     if (htp != NULL)
16893 	*htp = ht;
16894     if (ht == NULL)
16895 	return NULL;
16896     return find_var_in_ht(ht, varname, htp != NULL);
16897 }
16898 
16899 /*
16900  * Find variable "varname" in hashtab "ht".
16901  * Returns NULL if not found.
16902  */
16903     static dictitem_T *
16904 find_var_in_ht(ht, varname, writing)
16905     hashtab_T	*ht;
16906     char_u	*varname;
16907     int		writing;
16908 {
16909     hashitem_T	*hi;
16910 
16911     if (*varname == NUL)
16912     {
16913 	/* Must be something like "s:", otherwise "ht" would be NULL. */
16914 	switch (varname[-2])
16915 	{
16916 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
16917 	    case 'g': return &globvars_var;
16918 	    case 'v': return &vimvars_var;
16919 	    case 'b': return &curbuf->b_bufvar;
16920 	    case 'w': return &curwin->w_winvar;
16921 	    case 'l': return current_funccal == NULL
16922 					? NULL : &current_funccal->l_vars_var;
16923 	    case 'a': return current_funccal == NULL
16924 				       ? NULL : &current_funccal->l_avars_var;
16925 	}
16926 	return NULL;
16927     }
16928 
16929     hi = hash_find(ht, varname);
16930     if (HASHITEM_EMPTY(hi))
16931     {
16932 	/* For global variables we may try auto-loading the script.  If it
16933 	 * worked find the variable again.  Don't auto-load a script if it was
16934 	 * loaded already, otherwise it would be loaded every time when
16935 	 * checking if a function name is a Funcref variable. */
16936 	if (ht == &globvarht && !writing
16937 			    && script_autoload(varname, FALSE) && !aborting())
16938 	    hi = hash_find(ht, varname);
16939 	if (HASHITEM_EMPTY(hi))
16940 	    return NULL;
16941     }
16942     return HI2DI(hi);
16943 }
16944 
16945 /*
16946  * Find the hashtab used for a variable name.
16947  * Set "varname" to the start of name without ':'.
16948  */
16949     static hashtab_T *
16950 find_var_ht(name, varname)
16951     char_u  *name;
16952     char_u  **varname;
16953 {
16954     hashitem_T	*hi;
16955 
16956     if (name[1] != ':')
16957     {
16958 	/* The name must not start with a colon or #. */
16959 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
16960 	    return NULL;
16961 	*varname = name;
16962 
16963 	/* "version" is "v:version" in all scopes */
16964 	hi = hash_find(&compat_hashtab, name);
16965 	if (!HASHITEM_EMPTY(hi))
16966 	    return &compat_hashtab;
16967 
16968 	if (current_funccal == NULL)
16969 	    return &globvarht;			/* global variable */
16970 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
16971     }
16972     *varname = name + 2;
16973     if (*name == 'g')				/* global variable */
16974 	return &globvarht;
16975     /* There must be no ':' or '#' in the rest of the name, unless g: is used
16976      */
16977     if (vim_strchr(name + 2, ':') != NULL
16978 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
16979 	return NULL;
16980     if (*name == 'b')				/* buffer variable */
16981 	return &curbuf->b_vars.dv_hashtab;
16982     if (*name == 'w')				/* window variable */
16983 	return &curwin->w_vars.dv_hashtab;
16984     if (*name == 'v')				/* v: variable */
16985 	return &vimvarht;
16986     if (*name == 'a' && current_funccal != NULL) /* function argument */
16987 	return &current_funccal->l_avars.dv_hashtab;
16988     if (*name == 'l' && current_funccal != NULL) /* local function variable */
16989 	return &current_funccal->l_vars.dv_hashtab;
16990     if (*name == 's'				/* script variable */
16991 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
16992 	return &SCRIPT_VARS(current_SID);
16993     return NULL;
16994 }
16995 
16996 /*
16997  * Get the string value of a (global/local) variable.
16998  * Returns NULL when it doesn't exist.
16999  */
17000     char_u *
17001 get_var_value(name)
17002     char_u	*name;
17003 {
17004     dictitem_T	*v;
17005 
17006     v = find_var(name, NULL);
17007     if (v == NULL)
17008 	return NULL;
17009     return get_tv_string(&v->di_tv);
17010 }
17011 
17012 /*
17013  * Allocate a new hashtab for a sourced script.  It will be used while
17014  * sourcing this script and when executing functions defined in the script.
17015  */
17016     void
17017 new_script_vars(id)
17018     scid_T id;
17019 {
17020     int		i;
17021     hashtab_T	*ht;
17022     scriptvar_T *sv;
17023 
17024     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
17025     {
17026 	/* Re-allocating ga_data means that an ht_array pointing to
17027 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
17028 	 * at its init value.  Also reset "v_dict", it's always the same. */
17029 	for (i = 1; i <= ga_scripts.ga_len; ++i)
17030 	{
17031 	    ht = &SCRIPT_VARS(i);
17032 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
17033 		ht->ht_array = ht->ht_smallarray;
17034 	    sv = &SCRIPT_SV(i);
17035 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
17036 	}
17037 
17038 	while (ga_scripts.ga_len < id)
17039 	{
17040 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
17041 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
17042 	    ++ga_scripts.ga_len;
17043 	}
17044     }
17045 }
17046 
17047 /*
17048  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
17049  * point to it.
17050  */
17051     void
17052 init_var_dict(dict, dict_var)
17053     dict_T	*dict;
17054     dictitem_T	*dict_var;
17055 {
17056     hash_init(&dict->dv_hashtab);
17057     dict->dv_refcount = 99999;
17058     dict_var->di_tv.vval.v_dict = dict;
17059     dict_var->di_tv.v_type = VAR_DICT;
17060     dict_var->di_tv.v_lock = VAR_FIXED;
17061     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
17062     dict_var->di_key[0] = NUL;
17063 }
17064 
17065 /*
17066  * Clean up a list of internal variables.
17067  * Frees all allocated variables and the value they contain.
17068  * Clears hashtab "ht", does not free it.
17069  */
17070     void
17071 vars_clear(ht)
17072     hashtab_T *ht;
17073 {
17074     vars_clear_ext(ht, TRUE);
17075 }
17076 
17077 /*
17078  * Like vars_clear(), but only free the value if "free_val" is TRUE.
17079  */
17080     static void
17081 vars_clear_ext(ht, free_val)
17082     hashtab_T	*ht;
17083     int		free_val;
17084 {
17085     int		todo;
17086     hashitem_T	*hi;
17087     dictitem_T	*v;
17088 
17089     hash_lock(ht);
17090     todo = ht->ht_used;
17091     for (hi = ht->ht_array; todo > 0; ++hi)
17092     {
17093 	if (!HASHITEM_EMPTY(hi))
17094 	{
17095 	    --todo;
17096 
17097 	    /* Free the variable.  Don't remove it from the hashtab,
17098 	     * ht_array might change then.  hash_clear() takes care of it
17099 	     * later. */
17100 	    v = HI2DI(hi);
17101 	    if (free_val)
17102 		clear_tv(&v->di_tv);
17103 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
17104 		vim_free(v);
17105 	}
17106     }
17107     hash_clear(ht);
17108     ht->ht_used = 0;
17109 }
17110 
17111 /*
17112  * Delete a variable from hashtab "ht" at item "hi".
17113  * Clear the variable value and free the dictitem.
17114  */
17115     static void
17116 delete_var(ht, hi)
17117     hashtab_T	*ht;
17118     hashitem_T	*hi;
17119 {
17120     dictitem_T	*di = HI2DI(hi);
17121 
17122     hash_remove(ht, hi);
17123     clear_tv(&di->di_tv);
17124     vim_free(di);
17125 }
17126 
17127 /*
17128  * List the value of one internal variable.
17129  */
17130     static void
17131 list_one_var(v, prefix)
17132     dictitem_T	*v;
17133     char_u	*prefix;
17134 {
17135     char_u	*tofree;
17136     char_u	*s;
17137     char_u	numbuf[NUMBUFLEN];
17138 
17139     s = echo_string(&v->di_tv, &tofree, numbuf, ++current_copyID);
17140     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
17141 						s == NULL ? (char_u *)"" : s);
17142     vim_free(tofree);
17143 }
17144 
17145     static void
17146 list_one_var_a(prefix, name, type, string)
17147     char_u	*prefix;
17148     char_u	*name;
17149     int		type;
17150     char_u	*string;
17151 {
17152     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
17153     if (name != NULL)	/* "a:" vars don't have a name stored */
17154 	msg_puts(name);
17155     msg_putchar(' ');
17156     msg_advance(22);
17157     if (type == VAR_NUMBER)
17158 	msg_putchar('#');
17159     else if (type == VAR_FUNC)
17160 	msg_putchar('*');
17161     else if (type == VAR_LIST)
17162     {
17163 	msg_putchar('[');
17164 	if (*string == '[')
17165 	    ++string;
17166     }
17167     else if (type == VAR_DICT)
17168     {
17169 	msg_putchar('{');
17170 	if (*string == '{')
17171 	    ++string;
17172     }
17173     else
17174 	msg_putchar(' ');
17175 
17176     msg_outtrans(string);
17177 
17178     if (type == VAR_FUNC)
17179 	msg_puts((char_u *)"()");
17180 }
17181 
17182 /*
17183  * Set variable "name" to value in "tv".
17184  * If the variable already exists, the value is updated.
17185  * Otherwise the variable is created.
17186  */
17187     static void
17188 set_var(name, tv, copy)
17189     char_u	*name;
17190     typval_T	*tv;
17191     int		copy;	    /* make copy of value in "tv" */
17192 {
17193     dictitem_T	*v;
17194     char_u	*varname;
17195     hashtab_T	*ht;
17196     char_u	*p;
17197 
17198     if (tv->v_type == VAR_FUNC)
17199     {
17200 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
17201 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
17202 							 ? name[2] : name[0]))
17203 	{
17204 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
17205 	    return;
17206 	}
17207 	if (function_exists(name))
17208 	{
17209 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
17210 									name);
17211 	    return;
17212 	}
17213     }
17214 
17215     ht = find_var_ht(name, &varname);
17216     if (ht == NULL || *varname == NUL)
17217     {
17218 	EMSG2(_(e_illvar), name);
17219 	return;
17220     }
17221 
17222     v = find_var_in_ht(ht, varname, TRUE);
17223     if (v != NULL)
17224     {
17225 	/* existing variable, need to clear the value */
17226 	if (var_check_ro(v->di_flags, name)
17227 				      || tv_check_lock(v->di_tv.v_lock, name))
17228 	    return;
17229 	if (v->di_tv.v_type != tv->v_type
17230 		&& !((v->di_tv.v_type == VAR_STRING
17231 			|| v->di_tv.v_type == VAR_NUMBER)
17232 		    && (tv->v_type == VAR_STRING
17233 			|| tv->v_type == VAR_NUMBER)))
17234 	{
17235 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
17236 	    return;
17237 	}
17238 
17239 	/*
17240 	 * Handle setting internal v: variables separately: we don't change
17241 	 * the type.
17242 	 */
17243 	if (ht == &vimvarht)
17244 	{
17245 	    if (v->di_tv.v_type == VAR_STRING)
17246 	    {
17247 		vim_free(v->di_tv.vval.v_string);
17248 		if (copy || tv->v_type != VAR_STRING)
17249 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
17250 		else
17251 		{
17252 		    /* Take over the string to avoid an extra alloc/free. */
17253 		    v->di_tv.vval.v_string = tv->vval.v_string;
17254 		    tv->vval.v_string = NULL;
17255 		}
17256 	    }
17257 	    else if (v->di_tv.v_type != VAR_NUMBER)
17258 		EMSG2(_(e_intern2), "set_var()");
17259 	    else
17260 		v->di_tv.vval.v_number = get_tv_number(tv);
17261 	    return;
17262 	}
17263 
17264 	clear_tv(&v->di_tv);
17265     }
17266     else		    /* add a new variable */
17267     {
17268 	/* Make sure the variable name is valid. */
17269 	for (p = varname; *p != NUL; ++p)
17270 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
17271 						       && *p != AUTOLOAD_CHAR)
17272 	    {
17273 		EMSG2(_(e_illvar), varname);
17274 		return;
17275 	    }
17276 
17277 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
17278 							  + STRLEN(varname)));
17279 	if (v == NULL)
17280 	    return;
17281 	STRCPY(v->di_key, varname);
17282 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
17283 	{
17284 	    vim_free(v);
17285 	    return;
17286 	}
17287 	v->di_flags = 0;
17288     }
17289 
17290     if (copy || tv->v_type == VAR_NUMBER)
17291 	copy_tv(tv, &v->di_tv);
17292     else
17293     {
17294 	v->di_tv = *tv;
17295 	v->di_tv.v_lock = 0;
17296 	init_tv(tv);
17297     }
17298 }
17299 
17300 /*
17301  * Return TRUE if di_flags "flags" indicate read-only variable "name".
17302  * Also give an error message.
17303  */
17304     static int
17305 var_check_ro(flags, name)
17306     int		flags;
17307     char_u	*name;
17308 {
17309     if (flags & DI_FLAGS_RO)
17310     {
17311 	EMSG2(_(e_readonlyvar), name);
17312 	return TRUE;
17313     }
17314     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
17315     {
17316 	EMSG2(_(e_readonlysbx), name);
17317 	return TRUE;
17318     }
17319     return FALSE;
17320 }
17321 
17322 /*
17323  * Return TRUE if typeval "tv" is set to be locked (immutable).
17324  * Also give an error message, using "name".
17325  */
17326     static int
17327 tv_check_lock(lock, name)
17328     int		lock;
17329     char_u	*name;
17330 {
17331     if (lock & VAR_LOCKED)
17332     {
17333 	EMSG2(_("E741: Value is locked: %s"),
17334 				name == NULL ? (char_u *)_("Unknown") : name);
17335 	return TRUE;
17336     }
17337     if (lock & VAR_FIXED)
17338     {
17339 	EMSG2(_("E742: Cannot change value of %s"),
17340 				name == NULL ? (char_u *)_("Unknown") : name);
17341 	return TRUE;
17342     }
17343     return FALSE;
17344 }
17345 
17346 /*
17347  * Copy the values from typval_T "from" to typval_T "to".
17348  * When needed allocates string or increases reference count.
17349  * Does not make a copy of a list or dict but copies the reference!
17350  */
17351     static void
17352 copy_tv(from, to)
17353     typval_T *from;
17354     typval_T *to;
17355 {
17356     to->v_type = from->v_type;
17357     to->v_lock = 0;
17358     switch (from->v_type)
17359     {
17360 	case VAR_NUMBER:
17361 	    to->vval.v_number = from->vval.v_number;
17362 	    break;
17363 	case VAR_STRING:
17364 	case VAR_FUNC:
17365 	    if (from->vval.v_string == NULL)
17366 		to->vval.v_string = NULL;
17367 	    else
17368 	    {
17369 		to->vval.v_string = vim_strsave(from->vval.v_string);
17370 		if (from->v_type == VAR_FUNC)
17371 		    func_ref(to->vval.v_string);
17372 	    }
17373 	    break;
17374 	case VAR_LIST:
17375 	    if (from->vval.v_list == NULL)
17376 		to->vval.v_list = NULL;
17377 	    else
17378 	    {
17379 		to->vval.v_list = from->vval.v_list;
17380 		++to->vval.v_list->lv_refcount;
17381 	    }
17382 	    break;
17383 	case VAR_DICT:
17384 	    if (from->vval.v_dict == NULL)
17385 		to->vval.v_dict = NULL;
17386 	    else
17387 	    {
17388 		to->vval.v_dict = from->vval.v_dict;
17389 		++to->vval.v_dict->dv_refcount;
17390 	    }
17391 	    break;
17392 	default:
17393 	    EMSG2(_(e_intern2), "copy_tv()");
17394 	    break;
17395     }
17396 }
17397 
17398 /*
17399  * Make a copy of an item.
17400  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
17401  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
17402  * reference to an already copied list/dict can be used.
17403  * Returns FAIL or OK.
17404  */
17405     static int
17406 item_copy(from, to, deep, copyID)
17407     typval_T	*from;
17408     typval_T	*to;
17409     int		deep;
17410     int		copyID;
17411 {
17412     static int	recurse = 0;
17413     int		ret = OK;
17414 
17415     if (recurse >= DICT_MAXNEST)
17416     {
17417 	EMSG(_("E698: variable nested too deep for making a copy"));
17418 	return FAIL;
17419     }
17420     ++recurse;
17421 
17422     switch (from->v_type)
17423     {
17424 	case VAR_NUMBER:
17425 	case VAR_STRING:
17426 	case VAR_FUNC:
17427 	    copy_tv(from, to);
17428 	    break;
17429 	case VAR_LIST:
17430 	    to->v_type = VAR_LIST;
17431 	    to->v_lock = 0;
17432 	    if (from->vval.v_list == NULL)
17433 		to->vval.v_list = NULL;
17434 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
17435 	    {
17436 		/* use the copy made earlier */
17437 		to->vval.v_list = from->vval.v_list->lv_copylist;
17438 		++to->vval.v_list->lv_refcount;
17439 	    }
17440 	    else
17441 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
17442 	    if (to->vval.v_list == NULL)
17443 		ret = FAIL;
17444 	    break;
17445 	case VAR_DICT:
17446 	    to->v_type = VAR_DICT;
17447 	    to->v_lock = 0;
17448 	    if (from->vval.v_dict == NULL)
17449 		to->vval.v_dict = NULL;
17450 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
17451 	    {
17452 		/* use the copy made earlier */
17453 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
17454 		++to->vval.v_dict->dv_refcount;
17455 	    }
17456 	    else
17457 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
17458 	    if (to->vval.v_dict == NULL)
17459 		ret = FAIL;
17460 	    break;
17461 	default:
17462 	    EMSG2(_(e_intern2), "item_copy()");
17463 	    ret = FAIL;
17464     }
17465     --recurse;
17466     return ret;
17467 }
17468 
17469 /*
17470  * ":echo expr1 ..."	print each argument separated with a space, add a
17471  *			newline at the end.
17472  * ":echon expr1 ..."	print each argument plain.
17473  */
17474     void
17475 ex_echo(eap)
17476     exarg_T	*eap;
17477 {
17478     char_u	*arg = eap->arg;
17479     typval_T	rettv;
17480     char_u	*tofree;
17481     char_u	*p;
17482     int		needclr = TRUE;
17483     int		atstart = TRUE;
17484     char_u	numbuf[NUMBUFLEN];
17485 
17486     if (eap->skip)
17487 	++emsg_skip;
17488     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
17489     {
17490 	p = arg;
17491 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
17492 	{
17493 	    /*
17494 	     * Report the invalid expression unless the expression evaluation
17495 	     * has been cancelled due to an aborting error, an interrupt, or an
17496 	     * exception.
17497 	     */
17498 	    if (!aborting())
17499 		EMSG2(_(e_invexpr2), p);
17500 	    break;
17501 	}
17502 	if (!eap->skip)
17503 	{
17504 	    if (atstart)
17505 	    {
17506 		atstart = FALSE;
17507 		/* Call msg_start() after eval1(), evaluating the expression
17508 		 * may cause a message to appear. */
17509 		if (eap->cmdidx == CMD_echo)
17510 		    msg_start();
17511 	    }
17512 	    else if (eap->cmdidx == CMD_echo)
17513 		msg_puts_attr((char_u *)" ", echo_attr);
17514 	    p = echo_string(&rettv, &tofree, numbuf, ++current_copyID);
17515 	    if (p != NULL)
17516 		for ( ; *p != NUL && !got_int; ++p)
17517 		{
17518 		    if (*p == '\n' || *p == '\r' || *p == TAB)
17519 		    {
17520 			if (*p != TAB && needclr)
17521 			{
17522 			    /* remove any text still there from the command */
17523 			    msg_clr_eos();
17524 			    needclr = FALSE;
17525 			}
17526 			msg_putchar_attr(*p, echo_attr);
17527 		    }
17528 		    else
17529 		    {
17530 #ifdef FEAT_MBYTE
17531 			if (has_mbyte)
17532 			{
17533 			    int i = (*mb_ptr2len)(p);
17534 
17535 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
17536 			    p += i - 1;
17537 			}
17538 			else
17539 #endif
17540 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
17541 		    }
17542 		}
17543 	    vim_free(tofree);
17544 	}
17545 	clear_tv(&rettv);
17546 	arg = skipwhite(arg);
17547     }
17548     eap->nextcmd = check_nextcmd(arg);
17549 
17550     if (eap->skip)
17551 	--emsg_skip;
17552     else
17553     {
17554 	/* remove text that may still be there from the command */
17555 	if (needclr)
17556 	    msg_clr_eos();
17557 	if (eap->cmdidx == CMD_echo)
17558 	    msg_end();
17559     }
17560 }
17561 
17562 /*
17563  * ":echohl {name}".
17564  */
17565     void
17566 ex_echohl(eap)
17567     exarg_T	*eap;
17568 {
17569     int		id;
17570 
17571     id = syn_name2id(eap->arg);
17572     if (id == 0)
17573 	echo_attr = 0;
17574     else
17575 	echo_attr = syn_id2attr(id);
17576 }
17577 
17578 /*
17579  * ":execute expr1 ..."	execute the result of an expression.
17580  * ":echomsg expr1 ..."	Print a message
17581  * ":echoerr expr1 ..."	Print an error
17582  * Each gets spaces around each argument and a newline at the end for
17583  * echo commands
17584  */
17585     void
17586 ex_execute(eap)
17587     exarg_T	*eap;
17588 {
17589     char_u	*arg = eap->arg;
17590     typval_T	rettv;
17591     int		ret = OK;
17592     char_u	*p;
17593     garray_T	ga;
17594     int		len;
17595     int		save_did_emsg;
17596 
17597     ga_init2(&ga, 1, 80);
17598 
17599     if (eap->skip)
17600 	++emsg_skip;
17601     while (*arg != NUL && *arg != '|' && *arg != '\n')
17602     {
17603 	p = arg;
17604 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
17605 	{
17606 	    /*
17607 	     * Report the invalid expression unless the expression evaluation
17608 	     * has been cancelled due to an aborting error, an interrupt, or an
17609 	     * exception.
17610 	     */
17611 	    if (!aborting())
17612 		EMSG2(_(e_invexpr2), p);
17613 	    ret = FAIL;
17614 	    break;
17615 	}
17616 
17617 	if (!eap->skip)
17618 	{
17619 	    p = get_tv_string(&rettv);
17620 	    len = (int)STRLEN(p);
17621 	    if (ga_grow(&ga, len + 2) == FAIL)
17622 	    {
17623 		clear_tv(&rettv);
17624 		ret = FAIL;
17625 		break;
17626 	    }
17627 	    if (ga.ga_len)
17628 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
17629 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
17630 	    ga.ga_len += len;
17631 	}
17632 
17633 	clear_tv(&rettv);
17634 	arg = skipwhite(arg);
17635     }
17636 
17637     if (ret != FAIL && ga.ga_data != NULL)
17638     {
17639 	if (eap->cmdidx == CMD_echomsg)
17640 	{
17641 	    MSG_ATTR(ga.ga_data, echo_attr);
17642 	    out_flush();
17643 	}
17644 	else if (eap->cmdidx == CMD_echoerr)
17645 	{
17646 	    /* We don't want to abort following commands, restore did_emsg. */
17647 	    save_did_emsg = did_emsg;
17648 	    EMSG((char_u *)ga.ga_data);
17649 	    if (!force_abort)
17650 		did_emsg = save_did_emsg;
17651 	}
17652 	else if (eap->cmdidx == CMD_execute)
17653 	    do_cmdline((char_u *)ga.ga_data,
17654 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
17655     }
17656 
17657     ga_clear(&ga);
17658 
17659     if (eap->skip)
17660 	--emsg_skip;
17661 
17662     eap->nextcmd = check_nextcmd(arg);
17663 }
17664 
17665 /*
17666  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
17667  * "arg" points to the "&" or '+' when called, to "option" when returning.
17668  * Returns NULL when no option name found.  Otherwise pointer to the char
17669  * after the option name.
17670  */
17671     static char_u *
17672 find_option_end(arg, opt_flags)
17673     char_u	**arg;
17674     int		*opt_flags;
17675 {
17676     char_u	*p = *arg;
17677 
17678     ++p;
17679     if (*p == 'g' && p[1] == ':')
17680     {
17681 	*opt_flags = OPT_GLOBAL;
17682 	p += 2;
17683     }
17684     else if (*p == 'l' && p[1] == ':')
17685     {
17686 	*opt_flags = OPT_LOCAL;
17687 	p += 2;
17688     }
17689     else
17690 	*opt_flags = 0;
17691 
17692     if (!ASCII_ISALPHA(*p))
17693 	return NULL;
17694     *arg = p;
17695 
17696     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
17697 	p += 4;	    /* termcap option */
17698     else
17699 	while (ASCII_ISALPHA(*p))
17700 	    ++p;
17701     return p;
17702 }
17703 
17704 /*
17705  * ":function"
17706  */
17707     void
17708 ex_function(eap)
17709     exarg_T	*eap;
17710 {
17711     char_u	*theline;
17712     int		j;
17713     int		c;
17714     int		saved_did_emsg;
17715     char_u	*name = NULL;
17716     char_u	*p;
17717     char_u	*arg;
17718     char_u	*line_arg = NULL;
17719     garray_T	newargs;
17720     garray_T	newlines;
17721     int		varargs = FALSE;
17722     int		mustend = FALSE;
17723     int		flags = 0;
17724     ufunc_T	*fp;
17725     int		indent;
17726     int		nesting;
17727     char_u	*skip_until = NULL;
17728     dictitem_T	*v;
17729     funcdict_T	fudi;
17730     static int	func_nr = 0;	    /* number for nameless function */
17731     int		paren;
17732     hashtab_T	*ht;
17733     int		todo;
17734     hashitem_T	*hi;
17735     int		sourcing_lnum_off;
17736 
17737     /*
17738      * ":function" without argument: list functions.
17739      */
17740     if (ends_excmd(*eap->arg))
17741     {
17742 	if (!eap->skip)
17743 	{
17744 	    todo = func_hashtab.ht_used;
17745 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
17746 	    {
17747 		if (!HASHITEM_EMPTY(hi))
17748 		{
17749 		    --todo;
17750 		    fp = HI2UF(hi);
17751 		    if (!isdigit(*fp->uf_name))
17752 			list_func_head(fp, FALSE);
17753 		}
17754 	    }
17755 	}
17756 	eap->nextcmd = check_nextcmd(eap->arg);
17757 	return;
17758     }
17759 
17760     /*
17761      * ":function /pat": list functions matching pattern.
17762      */
17763     if (*eap->arg == '/')
17764     {
17765 	p = skip_regexp(eap->arg + 1, '/', TRUE, NULL);
17766 	if (!eap->skip)
17767 	{
17768 	    regmatch_T	regmatch;
17769 
17770 	    c = *p;
17771 	    *p = NUL;
17772 	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
17773 	    *p = c;
17774 	    if (regmatch.regprog != NULL)
17775 	    {
17776 		regmatch.rm_ic = p_ic;
17777 
17778 		todo = func_hashtab.ht_used;
17779 		for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
17780 		{
17781 		    if (!HASHITEM_EMPTY(hi))
17782 		    {
17783 			--todo;
17784 			fp = HI2UF(hi);
17785 			if (!isdigit(*fp->uf_name)
17786 				    && vim_regexec(&regmatch, fp->uf_name, 0))
17787 			    list_func_head(fp, FALSE);
17788 		    }
17789 		}
17790 	    }
17791 	}
17792 	if (*p == '/')
17793 	    ++p;
17794 	eap->nextcmd = check_nextcmd(p);
17795 	return;
17796     }
17797 
17798     /*
17799      * Get the function name.  There are these situations:
17800      * func	    normal function name
17801      *		    "name" == func, "fudi.fd_dict" == NULL
17802      * dict.func    new dictionary entry
17803      *		    "name" == NULL, "fudi.fd_dict" set,
17804      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
17805      * dict.func    existing dict entry with a Funcref
17806      *		    "name" == func, "fudi.fd_dict" set,
17807      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
17808      * dict.func    existing dict entry that's not a Funcref
17809      *		    "name" == NULL, "fudi.fd_dict" set,
17810      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
17811      */
17812     p = eap->arg;
17813     name = trans_function_name(&p, eap->skip, 0, &fudi);
17814     paren = (vim_strchr(p, '(') != NULL);
17815     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
17816     {
17817 	/*
17818 	 * Return on an invalid expression in braces, unless the expression
17819 	 * evaluation has been cancelled due to an aborting error, an
17820 	 * interrupt, or an exception.
17821 	 */
17822 	if (!aborting())
17823 	{
17824 	    if (!eap->skip && fudi.fd_newkey != NULL)
17825 		EMSG2(_(e_dictkey), fudi.fd_newkey);
17826 	    vim_free(fudi.fd_newkey);
17827 	    return;
17828 	}
17829 	else
17830 	    eap->skip = TRUE;
17831     }
17832 
17833     /* An error in a function call during evaluation of an expression in magic
17834      * braces should not cause the function not to be defined. */
17835     saved_did_emsg = did_emsg;
17836     did_emsg = FALSE;
17837 
17838     /*
17839      * ":function func" with only function name: list function.
17840      */
17841     if (!paren)
17842     {
17843 	if (!ends_excmd(*skipwhite(p)))
17844 	{
17845 	    EMSG(_(e_trailing));
17846 	    goto ret_free;
17847 	}
17848 	eap->nextcmd = check_nextcmd(p);
17849 	if (eap->nextcmd != NULL)
17850 	    *p = NUL;
17851 	if (!eap->skip && !got_int)
17852 	{
17853 	    fp = find_func(name);
17854 	    if (fp != NULL)
17855 	    {
17856 		list_func_head(fp, TRUE);
17857 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
17858 		{
17859 		    if (FUNCLINE(fp, j) == NULL)
17860 			continue;
17861 		    msg_putchar('\n');
17862 		    msg_outnum((long)(j + 1));
17863 		    if (j < 9)
17864 			msg_putchar(' ');
17865 		    if (j < 99)
17866 			msg_putchar(' ');
17867 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
17868 		    out_flush();	/* show a line at a time */
17869 		    ui_breakcheck();
17870 		}
17871 		if (!got_int)
17872 		{
17873 		    msg_putchar('\n');
17874 		    msg_puts((char_u *)"   endfunction");
17875 		}
17876 	    }
17877 	    else
17878 		emsg_funcname("E123: Undefined function: %s", name);
17879 	}
17880 	goto ret_free;
17881     }
17882 
17883     /*
17884      * ":function name(arg1, arg2)" Define function.
17885      */
17886     p = skipwhite(p);
17887     if (*p != '(')
17888     {
17889 	if (!eap->skip)
17890 	{
17891 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
17892 	    goto ret_free;
17893 	}
17894 	/* attempt to continue by skipping some text */
17895 	if (vim_strchr(p, '(') != NULL)
17896 	    p = vim_strchr(p, '(');
17897     }
17898     p = skipwhite(p + 1);
17899 
17900     ga_init2(&newargs, (int)sizeof(char_u *), 3);
17901     ga_init2(&newlines, (int)sizeof(char_u *), 3);
17902 
17903     if (!eap->skip)
17904     {
17905 	/* Check the name of the function. */
17906 	if (name != NULL)
17907 	    arg = name;
17908 	else
17909 	    arg = fudi.fd_newkey;
17910 	if (arg != NULL)
17911 	{
17912 	    if (*arg == K_SPECIAL)
17913 		j = 3;
17914 	    else
17915 		j = 0;
17916 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
17917 						      : eval_isnamec(arg[j])))
17918 		++j;
17919 	    if (arg[j] != NUL)
17920 		emsg_funcname(_(e_invarg2), arg);
17921 	}
17922     }
17923 
17924     /*
17925      * Isolate the arguments: "arg1, arg2, ...)"
17926      */
17927     while (*p != ')')
17928     {
17929 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
17930 	{
17931 	    varargs = TRUE;
17932 	    p += 3;
17933 	    mustend = TRUE;
17934 	}
17935 	else
17936 	{
17937 	    arg = p;
17938 	    while (ASCII_ISALNUM(*p) || *p == '_')
17939 		++p;
17940 	    if (arg == p || isdigit(*arg)
17941 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
17942 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
17943 	    {
17944 		if (!eap->skip)
17945 		    EMSG2(_("E125: Illegal argument: %s"), arg);
17946 		break;
17947 	    }
17948 	    if (ga_grow(&newargs, 1) == FAIL)
17949 		goto erret;
17950 	    c = *p;
17951 	    *p = NUL;
17952 	    arg = vim_strsave(arg);
17953 	    if (arg == NULL)
17954 		goto erret;
17955 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
17956 	    *p = c;
17957 	    newargs.ga_len++;
17958 	    if (*p == ',')
17959 		++p;
17960 	    else
17961 		mustend = TRUE;
17962 	}
17963 	p = skipwhite(p);
17964 	if (mustend && *p != ')')
17965 	{
17966 	    if (!eap->skip)
17967 		EMSG2(_(e_invarg2), eap->arg);
17968 	    break;
17969 	}
17970     }
17971     ++p;	/* skip the ')' */
17972 
17973     /* find extra arguments "range", "dict" and "abort" */
17974     for (;;)
17975     {
17976 	p = skipwhite(p);
17977 	if (STRNCMP(p, "range", 5) == 0)
17978 	{
17979 	    flags |= FC_RANGE;
17980 	    p += 5;
17981 	}
17982 	else if (STRNCMP(p, "dict", 4) == 0)
17983 	{
17984 	    flags |= FC_DICT;
17985 	    p += 4;
17986 	}
17987 	else if (STRNCMP(p, "abort", 5) == 0)
17988 	{
17989 	    flags |= FC_ABORT;
17990 	    p += 5;
17991 	}
17992 	else
17993 	    break;
17994     }
17995 
17996     /* When there is a line break use what follows for the function body.
17997      * Makes 'exe "func Test()\n...\nendfunc"' work. */
17998     if (*p == '\n')
17999 	line_arg = p + 1;
18000     else if (*p != NUL && *p != '"' && !eap->skip && !did_emsg)
18001 	EMSG(_(e_trailing));
18002 
18003     /*
18004      * Read the body of the function, until ":endfunction" is found.
18005      */
18006     if (KeyTyped)
18007     {
18008 	/* Check if the function already exists, don't let the user type the
18009 	 * whole function before telling him it doesn't work!  For a script we
18010 	 * need to skip the body to be able to find what follows. */
18011 	if (!eap->skip && !eap->forceit)
18012 	{
18013 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
18014 		EMSG(_(e_funcdict));
18015 	    else if (name != NULL && find_func(name) != NULL)
18016 		emsg_funcname(e_funcexts, name);
18017 	}
18018 
18019 	if (!eap->skip && did_emsg)
18020 	    goto erret;
18021 
18022 	msg_putchar('\n');	    /* don't overwrite the function name */
18023 	cmdline_row = msg_row;
18024     }
18025 
18026     indent = 2;
18027     nesting = 0;
18028     for (;;)
18029     {
18030 	msg_scroll = TRUE;
18031 	need_wait_return = FALSE;
18032 	sourcing_lnum_off = sourcing_lnum;
18033 
18034 	if (line_arg != NULL)
18035 	{
18036 	    /* Use eap->arg, split up in parts by line breaks. */
18037 	    theline = line_arg;
18038 	    p = vim_strchr(theline, '\n');
18039 	    if (p == NULL)
18040 		line_arg += STRLEN(line_arg);
18041 	    else
18042 	    {
18043 		*p = NUL;
18044 		line_arg = p + 1;
18045 	    }
18046 	}
18047 	else if (eap->getline == NULL)
18048 	    theline = getcmdline(':', 0L, indent);
18049 	else
18050 	    theline = eap->getline(':', eap->cookie, indent);
18051 	if (KeyTyped)
18052 	    lines_left = Rows - 1;
18053 	if (theline == NULL)
18054 	{
18055 	    EMSG(_("E126: Missing :endfunction"));
18056 	    goto erret;
18057 	}
18058 
18059 	/* Detect line continuation: sourcing_lnum increased more than one. */
18060 	if (sourcing_lnum > sourcing_lnum_off + 1)
18061 	    sourcing_lnum_off = sourcing_lnum - sourcing_lnum_off - 1;
18062 	else
18063 	    sourcing_lnum_off = 0;
18064 
18065 	if (skip_until != NULL)
18066 	{
18067 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
18068 	     * don't check for ":endfunc". */
18069 	    if (STRCMP(theline, skip_until) == 0)
18070 	    {
18071 		vim_free(skip_until);
18072 		skip_until = NULL;
18073 	    }
18074 	}
18075 	else
18076 	{
18077 	    /* skip ':' and blanks*/
18078 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
18079 		;
18080 
18081 	    /* Check for "endfunction". */
18082 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
18083 	    {
18084 		if (line_arg == NULL)
18085 		    vim_free(theline);
18086 		break;
18087 	    }
18088 
18089 	    /* Increase indent inside "if", "while", "for" and "try", decrease
18090 	     * at "end". */
18091 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
18092 		indent -= 2;
18093 	    else if (STRNCMP(p, "if", 2) == 0
18094 		    || STRNCMP(p, "wh", 2) == 0
18095 		    || STRNCMP(p, "for", 3) == 0
18096 		    || STRNCMP(p, "try", 3) == 0)
18097 		indent += 2;
18098 
18099 	    /* Check for defining a function inside this function. */
18100 	    if (checkforcmd(&p, "function", 2))
18101 	    {
18102 		if (*p == '!')
18103 		    p = skipwhite(p + 1);
18104 		p += eval_fname_script(p);
18105 		if (ASCII_ISALPHA(*p))
18106 		{
18107 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
18108 		    if (*skipwhite(p) == '(')
18109 		    {
18110 			++nesting;
18111 			indent += 2;
18112 		    }
18113 		}
18114 	    }
18115 
18116 	    /* Check for ":append" or ":insert". */
18117 	    p = skip_range(p, NULL);
18118 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
18119 		    || (p[0] == 'i'
18120 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
18121 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
18122 		skip_until = vim_strsave((char_u *)".");
18123 
18124 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
18125 	    arg = skipwhite(skiptowhite(p));
18126 	    if (arg[0] == '<' && arg[1] =='<'
18127 		    && ((p[0] == 'p' && p[1] == 'y'
18128 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
18129 			|| (p[0] == 'p' && p[1] == 'e'
18130 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
18131 			|| (p[0] == 't' && p[1] == 'c'
18132 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
18133 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
18134 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
18135 			|| (p[0] == 'm' && p[1] == 'z'
18136 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
18137 			))
18138 	    {
18139 		/* ":python <<" continues until a dot, like ":append" */
18140 		p = skipwhite(arg + 2);
18141 		if (*p == NUL)
18142 		    skip_until = vim_strsave((char_u *)".");
18143 		else
18144 		    skip_until = vim_strsave(p);
18145 	    }
18146 	}
18147 
18148 	/* Add the line to the function. */
18149 	if (ga_grow(&newlines, 1 + sourcing_lnum_off) == FAIL)
18150 	{
18151 	    if (line_arg == NULL)
18152 		vim_free(theline);
18153 	    goto erret;
18154 	}
18155 
18156 	/* Copy the line to newly allocated memory.  get_one_sourceline()
18157 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
18158 	 * is an extra alloc/free. */
18159 	p = vim_strsave(theline);
18160 	if (p != NULL)
18161 	{
18162 	    if (line_arg == NULL)
18163 		vim_free(theline);
18164 	    theline = p;
18165 	}
18166 
18167 	((char_u **)(newlines.ga_data))[newlines.ga_len++] = theline;
18168 
18169 	/* Add NULL lines for continuation lines, so that the line count is
18170 	 * equal to the index in the growarray.   */
18171 	while (sourcing_lnum_off-- > 0)
18172 	    ((char_u **)(newlines.ga_data))[newlines.ga_len++] = NULL;
18173 
18174 	/* Check for end of eap->arg. */
18175 	if (line_arg != NULL && *line_arg == NUL)
18176 	    line_arg = NULL;
18177     }
18178 
18179     /* Don't define the function when skipping commands or when an error was
18180      * detected. */
18181     if (eap->skip || did_emsg)
18182 	goto erret;
18183 
18184     /*
18185      * If there are no errors, add the function
18186      */
18187     if (fudi.fd_dict == NULL)
18188     {
18189 	v = find_var(name, &ht);
18190 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
18191 	{
18192 	    emsg_funcname("E707: Function name conflicts with variable: %s",
18193 									name);
18194 	    goto erret;
18195 	}
18196 
18197 	fp = find_func(name);
18198 	if (fp != NULL)
18199 	{
18200 	    if (!eap->forceit)
18201 	    {
18202 		emsg_funcname(e_funcexts, name);
18203 		goto erret;
18204 	    }
18205 	    if (fp->uf_calls > 0)
18206 	    {
18207 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
18208 									name);
18209 		goto erret;
18210 	    }
18211 	    /* redefine existing function */
18212 	    ga_clear_strings(&(fp->uf_args));
18213 	    ga_clear_strings(&(fp->uf_lines));
18214 	    vim_free(name);
18215 	    name = NULL;
18216 	}
18217     }
18218     else
18219     {
18220 	char	numbuf[20];
18221 
18222 	fp = NULL;
18223 	if (fudi.fd_newkey == NULL && !eap->forceit)
18224 	{
18225 	    EMSG(_(e_funcdict));
18226 	    goto erret;
18227 	}
18228 	if (fudi.fd_di == NULL)
18229 	{
18230 	    /* Can't add a function to a locked dictionary */
18231 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
18232 		goto erret;
18233 	}
18234 	    /* Can't change an existing function if it is locked */
18235 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
18236 	    goto erret;
18237 
18238 	/* Give the function a sequential number.  Can only be used with a
18239 	 * Funcref! */
18240 	vim_free(name);
18241 	sprintf(numbuf, "%d", ++func_nr);
18242 	name = vim_strsave((char_u *)numbuf);
18243 	if (name == NULL)
18244 	    goto erret;
18245     }
18246 
18247     if (fp == NULL)
18248     {
18249 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
18250 	{
18251 	    int	    slen, plen;
18252 	    char_u  *scriptname;
18253 
18254 	    /* Check that the autoload name matches the script name. */
18255 	    j = FAIL;
18256 	    if (sourcing_name != NULL)
18257 	    {
18258 		scriptname = autoload_name(name);
18259 		if (scriptname != NULL)
18260 		{
18261 		    p = vim_strchr(scriptname, '/');
18262 		    plen = STRLEN(p);
18263 		    slen = STRLEN(sourcing_name);
18264 		    if (slen > plen && fnamecmp(p,
18265 					    sourcing_name + slen - plen) == 0)
18266 			j = OK;
18267 		    vim_free(scriptname);
18268 		}
18269 	    }
18270 	    if (j == FAIL)
18271 	    {
18272 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
18273 		goto erret;
18274 	    }
18275 	}
18276 
18277 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
18278 	if (fp == NULL)
18279 	    goto erret;
18280 
18281 	if (fudi.fd_dict != NULL)
18282 	{
18283 	    if (fudi.fd_di == NULL)
18284 	    {
18285 		/* add new dict entry */
18286 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
18287 		if (fudi.fd_di == NULL)
18288 		{
18289 		    vim_free(fp);
18290 		    goto erret;
18291 		}
18292 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
18293 		{
18294 		    vim_free(fudi.fd_di);
18295 		    goto erret;
18296 		}
18297 	    }
18298 	    else
18299 		/* overwrite existing dict entry */
18300 		clear_tv(&fudi.fd_di->di_tv);
18301 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
18302 	    fudi.fd_di->di_tv.v_lock = 0;
18303 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
18304 	    fp->uf_refcount = 1;
18305 	}
18306 
18307 	/* insert the new function in the function list */
18308 	STRCPY(fp->uf_name, name);
18309 	hash_add(&func_hashtab, UF2HIKEY(fp));
18310     }
18311     fp->uf_args = newargs;
18312     fp->uf_lines = newlines;
18313 #ifdef FEAT_PROFILE
18314     fp->uf_tml_count = NULL;
18315     fp->uf_tml_total = NULL;
18316     fp->uf_tml_self = NULL;
18317     fp->uf_profiling = FALSE;
18318     if (prof_def_func())
18319 	func_do_profile(fp);
18320 #endif
18321     fp->uf_varargs = varargs;
18322     fp->uf_flags = flags;
18323     fp->uf_calls = 0;
18324     fp->uf_script_ID = current_SID;
18325     goto ret_free;
18326 
18327 erret:
18328     ga_clear_strings(&newargs);
18329     ga_clear_strings(&newlines);
18330 ret_free:
18331     vim_free(skip_until);
18332     vim_free(fudi.fd_newkey);
18333     vim_free(name);
18334     did_emsg |= saved_did_emsg;
18335 }
18336 
18337 /*
18338  * Get a function name, translating "<SID>" and "<SNR>".
18339  * Also handles a Funcref in a List or Dictionary.
18340  * Returns the function name in allocated memory, or NULL for failure.
18341  * flags:
18342  * TFN_INT:   internal function name OK
18343  * TFN_QUIET: be quiet
18344  * Advances "pp" to just after the function name (if no error).
18345  */
18346     static char_u *
18347 trans_function_name(pp, skip, flags, fdp)
18348     char_u	**pp;
18349     int		skip;		/* only find the end, don't evaluate */
18350     int		flags;
18351     funcdict_T	*fdp;		/* return: info about dictionary used */
18352 {
18353     char_u	*name = NULL;
18354     char_u	*start;
18355     char_u	*end;
18356     int		lead;
18357     char_u	sid_buf[20];
18358     int		len;
18359     lval_T	lv;
18360 
18361     if (fdp != NULL)
18362 	vim_memset(fdp, 0, sizeof(funcdict_T));
18363     start = *pp;
18364 
18365     /* Check for hard coded <SNR>: already translated function ID (from a user
18366      * command). */
18367     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
18368 						   && (*pp)[2] == (int)KE_SNR)
18369     {
18370 	*pp += 3;
18371 	len = get_id_len(pp) + 3;
18372 	return vim_strnsave(start, len);
18373     }
18374 
18375     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
18376      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
18377     lead = eval_fname_script(start);
18378     if (lead > 2)
18379 	start += lead;
18380 
18381     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
18382 					      lead > 2 ? 0 : FNE_CHECK_START);
18383     if (end == start)
18384     {
18385 	if (!skip)
18386 	    EMSG(_("E129: Function name required"));
18387 	goto theend;
18388     }
18389     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
18390     {
18391 	/*
18392 	 * Report an invalid expression in braces, unless the expression
18393 	 * evaluation has been cancelled due to an aborting error, an
18394 	 * interrupt, or an exception.
18395 	 */
18396 	if (!aborting())
18397 	{
18398 	    if (end != NULL)
18399 		EMSG2(_(e_invarg2), start);
18400 	}
18401 	else
18402 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
18403 	goto theend;
18404     }
18405 
18406     if (lv.ll_tv != NULL)
18407     {
18408 	if (fdp != NULL)
18409 	{
18410 	    fdp->fd_dict = lv.ll_dict;
18411 	    fdp->fd_newkey = lv.ll_newkey;
18412 	    lv.ll_newkey = NULL;
18413 	    fdp->fd_di = lv.ll_di;
18414 	}
18415 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
18416 	{
18417 	    name = vim_strsave(lv.ll_tv->vval.v_string);
18418 	    *pp = end;
18419 	}
18420 	else
18421 	{
18422 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
18423 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
18424 		EMSG(_(e_funcref));
18425 	    else
18426 		*pp = end;
18427 	    name = NULL;
18428 	}
18429 	goto theend;
18430     }
18431 
18432     if (lv.ll_name == NULL)
18433     {
18434 	/* Error found, but continue after the function name. */
18435 	*pp = end;
18436 	goto theend;
18437     }
18438 
18439     if (lv.ll_exp_name != NULL)
18440     {
18441 	len = STRLEN(lv.ll_exp_name);
18442 	if (lead <= 2 && lv.ll_name == lv.ll_exp_name
18443 					 && STRNCMP(lv.ll_name, "s:", 2) == 0)
18444 	{
18445 	    /* When there was "s:" already or the name expanded to get a
18446 	     * leading "s:" then remove it. */
18447 	    lv.ll_name += 2;
18448 	    len -= 2;
18449 	    lead = 2;
18450 	}
18451     }
18452     else
18453     {
18454 	if (lead == 2)	/* skip over "s:" */
18455 	    lv.ll_name += 2;
18456 	len = (int)(end - lv.ll_name);
18457     }
18458 
18459     /*
18460      * Copy the function name to allocated memory.
18461      * Accept <SID>name() inside a script, translate into <SNR>123_name().
18462      * Accept <SNR>123_name() outside a script.
18463      */
18464     if (skip)
18465 	lead = 0;	/* do nothing */
18466     else if (lead > 0)
18467     {
18468 	lead = 3;
18469 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
18470 	{
18471 	    if (current_SID <= 0)
18472 	    {
18473 		EMSG(_(e_usingsid));
18474 		goto theend;
18475 	    }
18476 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
18477 	    lead += (int)STRLEN(sid_buf);
18478 	}
18479     }
18480     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
18481     {
18482 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
18483 	goto theend;
18484     }
18485     name = alloc((unsigned)(len + lead + 1));
18486     if (name != NULL)
18487     {
18488 	if (lead > 0)
18489 	{
18490 	    name[0] = K_SPECIAL;
18491 	    name[1] = KS_EXTRA;
18492 	    name[2] = (int)KE_SNR;
18493 	    if (lead > 3)	/* If it's "<SID>" */
18494 		STRCPY(name + 3, sid_buf);
18495 	}
18496 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
18497 	name[len + lead] = NUL;
18498     }
18499     *pp = end;
18500 
18501 theend:
18502     clear_lval(&lv);
18503     return name;
18504 }
18505 
18506 /*
18507  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
18508  * Return 2 if "p" starts with "s:".
18509  * Return 0 otherwise.
18510  */
18511     static int
18512 eval_fname_script(p)
18513     char_u	*p;
18514 {
18515     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
18516 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
18517 	return 5;
18518     if (p[0] == 's' && p[1] == ':')
18519 	return 2;
18520     return 0;
18521 }
18522 
18523 /*
18524  * Return TRUE if "p" starts with "<SID>" or "s:".
18525  * Only works if eval_fname_script() returned non-zero for "p"!
18526  */
18527     static int
18528 eval_fname_sid(p)
18529     char_u	*p;
18530 {
18531     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
18532 }
18533 
18534 /*
18535  * List the head of the function: "name(arg1, arg2)".
18536  */
18537     static void
18538 list_func_head(fp, indent)
18539     ufunc_T	*fp;
18540     int		indent;
18541 {
18542     int		j;
18543 
18544     msg_start();
18545     if (indent)
18546 	MSG_PUTS("   ");
18547     MSG_PUTS("function ");
18548     if (fp->uf_name[0] == K_SPECIAL)
18549     {
18550 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
18551 	msg_puts(fp->uf_name + 3);
18552     }
18553     else
18554 	msg_puts(fp->uf_name);
18555     msg_putchar('(');
18556     for (j = 0; j < fp->uf_args.ga_len; ++j)
18557     {
18558 	if (j)
18559 	    MSG_PUTS(", ");
18560 	msg_puts(FUNCARG(fp, j));
18561     }
18562     if (fp->uf_varargs)
18563     {
18564 	if (j)
18565 	    MSG_PUTS(", ");
18566 	MSG_PUTS("...");
18567     }
18568     msg_putchar(')');
18569     msg_clr_eos();
18570     if (p_verbose > 0)
18571 	last_set_msg(fp->uf_script_ID);
18572 }
18573 
18574 /*
18575  * Find a function by name, return pointer to it in ufuncs.
18576  * Return NULL for unknown function.
18577  */
18578     static ufunc_T *
18579 find_func(name)
18580     char_u	*name;
18581 {
18582     hashitem_T	*hi;
18583 
18584     hi = hash_find(&func_hashtab, name);
18585     if (!HASHITEM_EMPTY(hi))
18586 	return HI2UF(hi);
18587     return NULL;
18588 }
18589 
18590 #if defined(EXITFREE) || defined(PROTO)
18591     void
18592 free_all_functions()
18593 {
18594     hashitem_T	*hi;
18595 
18596     /* Need to start all over every time, because func_free() may change the
18597      * hash table. */
18598     while (func_hashtab.ht_used > 0)
18599 	for (hi = func_hashtab.ht_array; ; ++hi)
18600 	    if (!HASHITEM_EMPTY(hi))
18601 	    {
18602 		func_free(HI2UF(hi));
18603 		break;
18604 	    }
18605 }
18606 #endif
18607 
18608 /*
18609  * Return TRUE if a function "name" exists.
18610  */
18611     static int
18612 function_exists(name)
18613     char_u *name;
18614 {
18615     char_u  *p = name;
18616     int	    n = FALSE;
18617 
18618     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
18619     if (p != NULL)
18620     {
18621 	if (builtin_function(p))
18622 	    n = (find_internal_func(p) >= 0);
18623 	else
18624 	    n = (find_func(p) != NULL);
18625 	vim_free(p);
18626     }
18627     return n;
18628 }
18629 
18630 /*
18631  * Return TRUE if "name" looks like a builtin function name: starts with a
18632  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
18633  */
18634     static int
18635 builtin_function(name)
18636     char_u *name;
18637 {
18638     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
18639 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
18640 }
18641 
18642 #if defined(FEAT_PROFILE) || defined(PROTO)
18643 /*
18644  * Start profiling function "fp".
18645  */
18646     static void
18647 func_do_profile(fp)
18648     ufunc_T	*fp;
18649 {
18650     fp->uf_tm_count = 0;
18651     profile_zero(&fp->uf_tm_self);
18652     profile_zero(&fp->uf_tm_total);
18653     if (fp->uf_tml_count == NULL)
18654 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
18655 					 (sizeof(int) * fp->uf_lines.ga_len));
18656     if (fp->uf_tml_total == NULL)
18657 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
18658 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
18659     if (fp->uf_tml_self == NULL)
18660 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
18661 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
18662     fp->uf_tml_idx = -1;
18663     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
18664 						   || fp->uf_tml_self == NULL)
18665 	return;	    /* out of memory */
18666 
18667     fp->uf_profiling = TRUE;
18668 }
18669 
18670 /*
18671  * Dump the profiling results for all functions in file "fd".
18672  */
18673     void
18674 func_dump_profile(fd)
18675     FILE    *fd;
18676 {
18677     hashitem_T	*hi;
18678     int		todo;
18679     ufunc_T	*fp;
18680     int		i;
18681     ufunc_T	**sorttab;
18682     int		st_len = 0;
18683 
18684     todo = func_hashtab.ht_used;
18685     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
18686 
18687     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
18688     {
18689 	if (!HASHITEM_EMPTY(hi))
18690 	{
18691 	    --todo;
18692 	    fp = HI2UF(hi);
18693 	    if (fp->uf_profiling)
18694 	    {
18695 		if (sorttab != NULL)
18696 		    sorttab[st_len++] = fp;
18697 
18698 		if (fp->uf_name[0] == K_SPECIAL)
18699 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
18700 		else
18701 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
18702 		if (fp->uf_tm_count == 1)
18703 		    fprintf(fd, "Called 1 time\n");
18704 		else
18705 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
18706 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
18707 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
18708 		fprintf(fd, "\n");
18709 		fprintf(fd, "count  total (s)   self (s)\n");
18710 
18711 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
18712 		{
18713 		    if (FUNCLINE(fp, i) == NULL)
18714 			continue;
18715 		    prof_func_line(fd, fp->uf_tml_count[i],
18716 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
18717 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
18718 		}
18719 		fprintf(fd, "\n");
18720 	    }
18721 	}
18722     }
18723 
18724     if (sorttab != NULL && st_len > 0)
18725     {
18726 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
18727 							      prof_total_cmp);
18728 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
18729 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
18730 							      prof_self_cmp);
18731 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
18732     }
18733 }
18734 
18735     static void
18736 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
18737     FILE	*fd;
18738     ufunc_T	**sorttab;
18739     int		st_len;
18740     char	*title;
18741     int		prefer_self;	/* when equal print only self time */
18742 {
18743     int		i;
18744     ufunc_T	*fp;
18745 
18746     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
18747     fprintf(fd, "count  total (s)   self (s)  function\n");
18748     for (i = 0; i < 20 && i < st_len; ++i)
18749     {
18750 	fp = sorttab[i];
18751 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
18752 								 prefer_self);
18753 	if (fp->uf_name[0] == K_SPECIAL)
18754 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
18755 	else
18756 	    fprintf(fd, " %s()\n", fp->uf_name);
18757     }
18758     fprintf(fd, "\n");
18759 }
18760 
18761 /*
18762  * Print the count and times for one function or function line.
18763  */
18764     static void
18765 prof_func_line(fd, count, total, self, prefer_self)
18766     FILE	*fd;
18767     int		count;
18768     proftime_T	*total;
18769     proftime_T	*self;
18770     int		prefer_self;	/* when equal print only self time */
18771 {
18772     if (count > 0)
18773     {
18774 	fprintf(fd, "%5d ", count);
18775 	if (prefer_self && profile_equal(total, self))
18776 	    fprintf(fd, "           ");
18777 	else
18778 	    fprintf(fd, "%s ", profile_msg(total));
18779 	if (!prefer_self && profile_equal(total, self))
18780 	    fprintf(fd, "           ");
18781 	else
18782 	    fprintf(fd, "%s ", profile_msg(self));
18783     }
18784     else
18785 	fprintf(fd, "                            ");
18786 }
18787 
18788 /*
18789  * Compare function for total time sorting.
18790  */
18791     static int
18792 #ifdef __BORLANDC__
18793 _RTLENTRYF
18794 #endif
18795 prof_total_cmp(s1, s2)
18796     const void	*s1;
18797     const void	*s2;
18798 {
18799     ufunc_T	*p1, *p2;
18800 
18801     p1 = *(ufunc_T **)s1;
18802     p2 = *(ufunc_T **)s2;
18803     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
18804 }
18805 
18806 /*
18807  * Compare function for self time sorting.
18808  */
18809     static int
18810 #ifdef __BORLANDC__
18811 _RTLENTRYF
18812 #endif
18813 prof_self_cmp(s1, s2)
18814     const void	*s1;
18815     const void	*s2;
18816 {
18817     ufunc_T	*p1, *p2;
18818 
18819     p1 = *(ufunc_T **)s1;
18820     p2 = *(ufunc_T **)s2;
18821     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
18822 }
18823 
18824 #endif
18825 
18826 /* The names of packages that once were loaded is remembered. */
18827 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
18828 
18829 /*
18830  * If "name" has a package name try autoloading the script for it.
18831  * Return TRUE if a package was loaded.
18832  */
18833     static int
18834 script_autoload(name, reload)
18835     char_u	*name;
18836     int		reload;	    /* load script again when already loaded */
18837 {
18838     char_u	*p;
18839     char_u	*scriptname, *tofree;
18840     int		ret = FALSE;
18841     int		i;
18842 
18843     /* If there is no '#' after name[0] there is no package name. */
18844     p = vim_strchr(name, AUTOLOAD_CHAR);
18845     if (p == NULL || p == name)
18846 	return FALSE;
18847 
18848     tofree = scriptname = autoload_name(name);
18849 
18850     /* Find the name in the list of previously loaded package names.  Skip
18851      * "autoload/", it's always the same. */
18852     for (i = 0; i < ga_loaded.ga_len; ++i)
18853 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
18854 	    break;
18855     if (!reload && i < ga_loaded.ga_len)
18856 	ret = FALSE;	    /* was loaded already */
18857     else
18858     {
18859 	/* Remember the name if it wasn't loaded already. */
18860 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
18861 	{
18862 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
18863 	    tofree = NULL;
18864 	}
18865 
18866 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
18867 	if (source_runtime(scriptname, FALSE) == OK)
18868 	    ret = TRUE;
18869     }
18870 
18871     vim_free(tofree);
18872     return ret;
18873 }
18874 
18875 /*
18876  * Return the autoload script name for a function or variable name.
18877  * Returns NULL when out of memory.
18878  */
18879     static char_u *
18880 autoload_name(name)
18881     char_u	*name;
18882 {
18883     char_u	*p;
18884     char_u	*scriptname;
18885 
18886     /* Get the script file name: replace '#' with '/', append ".vim". */
18887     scriptname = alloc((unsigned)(STRLEN(name) + 14));
18888     if (scriptname == NULL)
18889 	return FALSE;
18890     STRCPY(scriptname, "autoload/");
18891     STRCAT(scriptname, name);
18892     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
18893     STRCAT(scriptname, ".vim");
18894     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
18895 	*p = '/';
18896     return scriptname;
18897 }
18898 
18899 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
18900 
18901 /*
18902  * Function given to ExpandGeneric() to obtain the list of user defined
18903  * function names.
18904  */
18905     char_u *
18906 get_user_func_name(xp, idx)
18907     expand_T	*xp;
18908     int		idx;
18909 {
18910     static long_u	done;
18911     static hashitem_T	*hi;
18912     ufunc_T		*fp;
18913 
18914     if (idx == 0)
18915     {
18916 	done = 0;
18917 	hi = func_hashtab.ht_array;
18918     }
18919     if (done < func_hashtab.ht_used)
18920     {
18921 	if (done++ > 0)
18922 	    ++hi;
18923 	while (HASHITEM_EMPTY(hi))
18924 	    ++hi;
18925 	fp = HI2UF(hi);
18926 
18927 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
18928 	    return fp->uf_name;	/* prevents overflow */
18929 
18930 	cat_func_name(IObuff, fp);
18931 	if (xp->xp_context != EXPAND_USER_FUNC)
18932 	{
18933 	    STRCAT(IObuff, "(");
18934 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
18935 		STRCAT(IObuff, ")");
18936 	}
18937 	return IObuff;
18938     }
18939     return NULL;
18940 }
18941 
18942 #endif /* FEAT_CMDL_COMPL */
18943 
18944 /*
18945  * Copy the function name of "fp" to buffer "buf".
18946  * "buf" must be able to hold the function name plus three bytes.
18947  * Takes care of script-local function names.
18948  */
18949     static void
18950 cat_func_name(buf, fp)
18951     char_u	*buf;
18952     ufunc_T	*fp;
18953 {
18954     if (fp->uf_name[0] == K_SPECIAL)
18955     {
18956 	STRCPY(buf, "<SNR>");
18957 	STRCAT(buf, fp->uf_name + 3);
18958     }
18959     else
18960 	STRCPY(buf, fp->uf_name);
18961 }
18962 
18963 /*
18964  * ":delfunction {name}"
18965  */
18966     void
18967 ex_delfunction(eap)
18968     exarg_T	*eap;
18969 {
18970     ufunc_T	*fp = NULL;
18971     char_u	*p;
18972     char_u	*name;
18973     funcdict_T	fudi;
18974 
18975     p = eap->arg;
18976     name = trans_function_name(&p, eap->skip, 0, &fudi);
18977     vim_free(fudi.fd_newkey);
18978     if (name == NULL)
18979     {
18980 	if (fudi.fd_dict != NULL && !eap->skip)
18981 	    EMSG(_(e_funcref));
18982 	return;
18983     }
18984     if (!ends_excmd(*skipwhite(p)))
18985     {
18986 	vim_free(name);
18987 	EMSG(_(e_trailing));
18988 	return;
18989     }
18990     eap->nextcmd = check_nextcmd(p);
18991     if (eap->nextcmd != NULL)
18992 	*p = NUL;
18993 
18994     if (!eap->skip)
18995 	fp = find_func(name);
18996     vim_free(name);
18997 
18998     if (!eap->skip)
18999     {
19000 	if (fp == NULL)
19001 	{
19002 	    EMSG2(_(e_nofunc), eap->arg);
19003 	    return;
19004 	}
19005 	if (fp->uf_calls > 0)
19006 	{
19007 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
19008 	    return;
19009 	}
19010 
19011 	if (fudi.fd_dict != NULL)
19012 	{
19013 	    /* Delete the dict item that refers to the function, it will
19014 	     * invoke func_unref() and possibly delete the function. */
19015 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
19016 	}
19017 	else
19018 	    func_free(fp);
19019     }
19020 }
19021 
19022 /*
19023  * Free a function and remove it from the list of functions.
19024  */
19025     static void
19026 func_free(fp)
19027     ufunc_T *fp;
19028 {
19029     hashitem_T	*hi;
19030 
19031     /* clear this function */
19032     ga_clear_strings(&(fp->uf_args));
19033     ga_clear_strings(&(fp->uf_lines));
19034 #ifdef FEAT_PROFILE
19035     vim_free(fp->uf_tml_count);
19036     vim_free(fp->uf_tml_total);
19037     vim_free(fp->uf_tml_self);
19038 #endif
19039 
19040     /* remove the function from the function hashtable */
19041     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
19042     if (HASHITEM_EMPTY(hi))
19043 	EMSG2(_(e_intern2), "func_free()");
19044     else
19045 	hash_remove(&func_hashtab, hi);
19046 
19047     vim_free(fp);
19048 }
19049 
19050 /*
19051  * Unreference a Function: decrement the reference count and free it when it
19052  * becomes zero.  Only for numbered functions.
19053  */
19054     static void
19055 func_unref(name)
19056     char_u	*name;
19057 {
19058     ufunc_T *fp;
19059 
19060     if (name != NULL && isdigit(*name))
19061     {
19062 	fp = find_func(name);
19063 	if (fp == NULL)
19064 	    EMSG2(_(e_intern2), "func_unref()");
19065 	else if (--fp->uf_refcount <= 0)
19066 	{
19067 	    /* Only delete it when it's not being used.  Otherwise it's done
19068 	     * when "uf_calls" becomes zero. */
19069 	    if (fp->uf_calls == 0)
19070 		func_free(fp);
19071 	}
19072     }
19073 }
19074 
19075 /*
19076  * Count a reference to a Function.
19077  */
19078     static void
19079 func_ref(name)
19080     char_u	*name;
19081 {
19082     ufunc_T *fp;
19083 
19084     if (name != NULL && isdigit(*name))
19085     {
19086 	fp = find_func(name);
19087 	if (fp == NULL)
19088 	    EMSG2(_(e_intern2), "func_ref()");
19089 	else
19090 	    ++fp->uf_refcount;
19091     }
19092 }
19093 
19094 /*
19095  * Call a user function.
19096  */
19097     static void
19098 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
19099     ufunc_T	*fp;		/* pointer to function */
19100     int		argcount;	/* nr of args */
19101     typval_T	*argvars;	/* arguments */
19102     typval_T	*rettv;		/* return value */
19103     linenr_T	firstline;	/* first line of range */
19104     linenr_T	lastline;	/* last line of range */
19105     dict_T	*selfdict;	/* Dictionary for "self" */
19106 {
19107     char_u	*save_sourcing_name;
19108     linenr_T	save_sourcing_lnum;
19109     scid_T	save_current_SID;
19110     funccall_T	fc;
19111     int		save_did_emsg;
19112     static int	depth = 0;
19113     dictitem_T	*v;
19114     int		fixvar_idx = 0;	/* index in fixvar[] */
19115     int		i;
19116     int		ai;
19117     char_u	numbuf[NUMBUFLEN];
19118     char_u	*name;
19119 #ifdef FEAT_PROFILE
19120     proftime_T	wait_start;
19121 #endif
19122 
19123     /* If depth of calling is getting too high, don't execute the function */
19124     if (depth >= p_mfd)
19125     {
19126 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
19127 	rettv->v_type = VAR_NUMBER;
19128 	rettv->vval.v_number = -1;
19129 	return;
19130     }
19131     ++depth;
19132 
19133     line_breakcheck();		/* check for CTRL-C hit */
19134 
19135     fc.caller = current_funccal;
19136     current_funccal = &fc;
19137     fc.func = fp;
19138     fc.rettv = rettv;
19139     rettv->vval.v_number = 0;
19140     fc.linenr = 0;
19141     fc.returned = FALSE;
19142     fc.level = ex_nesting_level;
19143     /* Check if this function has a breakpoint. */
19144     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
19145     fc.dbg_tick = debug_tick;
19146 
19147     /*
19148      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
19149      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
19150      * each argument variable and saves a lot of time.
19151      */
19152     /*
19153      * Init l: variables.
19154      */
19155     init_var_dict(&fc.l_vars, &fc.l_vars_var);
19156     if (selfdict != NULL)
19157     {
19158 	/* Set l:self to "selfdict". */
19159 	v = &fc.fixvar[fixvar_idx++].var;
19160 	STRCPY(v->di_key, "self");
19161 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
19162 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
19163 	v->di_tv.v_type = VAR_DICT;
19164 	v->di_tv.v_lock = 0;
19165 	v->di_tv.vval.v_dict = selfdict;
19166 	++selfdict->dv_refcount;
19167     }
19168 
19169     /*
19170      * Init a: variables.
19171      * Set a:0 to "argcount".
19172      * Set a:000 to a list with room for the "..." arguments.
19173      */
19174     init_var_dict(&fc.l_avars, &fc.l_avars_var);
19175     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
19176 				(varnumber_T)(argcount - fp->uf_args.ga_len));
19177     v = &fc.fixvar[fixvar_idx++].var;
19178     STRCPY(v->di_key, "000");
19179     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19180     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19181     v->di_tv.v_type = VAR_LIST;
19182     v->di_tv.v_lock = VAR_FIXED;
19183     v->di_tv.vval.v_list = &fc.l_varlist;
19184     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
19185     fc.l_varlist.lv_refcount = 99999;
19186 
19187     /*
19188      * Set a:firstline to "firstline" and a:lastline to "lastline".
19189      * Set a:name to named arguments.
19190      * Set a:N to the "..." arguments.
19191      */
19192     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
19193 						      (varnumber_T)firstline);
19194     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
19195 						       (varnumber_T)lastline);
19196     for (i = 0; i < argcount; ++i)
19197     {
19198 	ai = i - fp->uf_args.ga_len;
19199 	if (ai < 0)
19200 	    /* named argument a:name */
19201 	    name = FUNCARG(fp, i);
19202 	else
19203 	{
19204 	    /* "..." argument a:1, a:2, etc. */
19205 	    sprintf((char *)numbuf, "%d", ai + 1);
19206 	    name = numbuf;
19207 	}
19208 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
19209 	{
19210 	    v = &fc.fixvar[fixvar_idx++].var;
19211 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19212 	}
19213 	else
19214 	{
19215 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
19216 							     + STRLEN(name)));
19217 	    if (v == NULL)
19218 		break;
19219 	    v->di_flags = DI_FLAGS_RO;
19220 	}
19221 	STRCPY(v->di_key, name);
19222 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
19223 
19224 	/* Note: the values are copied directly to avoid alloc/free.
19225 	 * "argvars" must have VAR_FIXED for v_lock. */
19226 	v->di_tv = argvars[i];
19227 	v->di_tv.v_lock = VAR_FIXED;
19228 
19229 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
19230 	{
19231 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
19232 	    fc.l_listitems[ai].li_tv = argvars[i];
19233 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
19234 	}
19235     }
19236 
19237     /* Don't redraw while executing the function. */
19238     ++RedrawingDisabled;
19239     save_sourcing_name = sourcing_name;
19240     save_sourcing_lnum = sourcing_lnum;
19241     sourcing_lnum = 1;
19242     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
19243 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
19244     if (sourcing_name != NULL)
19245     {
19246 	if (save_sourcing_name != NULL
19247 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
19248 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
19249 	else
19250 	    STRCPY(sourcing_name, "function ");
19251 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
19252 
19253 	if (p_verbose >= 12)
19254 	{
19255 	    ++no_wait_return;
19256 	    verbose_enter_scroll();
19257 
19258 	    smsg((char_u *)_("calling %s"), sourcing_name);
19259 	    if (p_verbose >= 14)
19260 	    {
19261 		char_u	buf[MSG_BUF_LEN];
19262 		char_u	numbuf[NUMBUFLEN];
19263 		char_u	*tofree;
19264 
19265 		msg_puts((char_u *)"(");
19266 		for (i = 0; i < argcount; ++i)
19267 		{
19268 		    if (i > 0)
19269 			msg_puts((char_u *)", ");
19270 		    if (argvars[i].v_type == VAR_NUMBER)
19271 			msg_outnum((long)argvars[i].vval.v_number);
19272 		    else
19273 		    {
19274 			trunc_string(tv2string(&argvars[i], &tofree, numbuf, 0),
19275 							    buf, MSG_BUF_CLEN);
19276 			msg_puts(buf);
19277 			vim_free(tofree);
19278 		    }
19279 		}
19280 		msg_puts((char_u *)")");
19281 	    }
19282 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
19283 
19284 	    verbose_leave_scroll();
19285 	    --no_wait_return;
19286 	}
19287     }
19288 #ifdef FEAT_PROFILE
19289     if (do_profiling)
19290     {
19291 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
19292 	    func_do_profile(fp);
19293 	if (fp->uf_profiling
19294 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
19295 	{
19296 	    ++fp->uf_tm_count;
19297 	    profile_start(&fp->uf_tm_start);
19298 	    profile_zero(&fp->uf_tm_children);
19299 	}
19300 	script_prof_save(&wait_start);
19301     }
19302 #endif
19303 
19304     save_current_SID = current_SID;
19305     current_SID = fp->uf_script_ID;
19306     save_did_emsg = did_emsg;
19307     did_emsg = FALSE;
19308 
19309     /* call do_cmdline() to execute the lines */
19310     do_cmdline(NULL, get_func_line, (void *)&fc,
19311 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
19312 
19313     --RedrawingDisabled;
19314 
19315     /* when the function was aborted because of an error, return -1 */
19316     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
19317     {
19318 	clear_tv(rettv);
19319 	rettv->v_type = VAR_NUMBER;
19320 	rettv->vval.v_number = -1;
19321     }
19322 
19323 #ifdef FEAT_PROFILE
19324     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
19325     {
19326 	profile_end(&fp->uf_tm_start);
19327 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
19328 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
19329 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
19330 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
19331 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
19332 	{
19333 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
19334 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
19335 	}
19336     }
19337 #endif
19338 
19339     /* when being verbose, mention the return value */
19340     if (p_verbose >= 12)
19341     {
19342 	++no_wait_return;
19343 	verbose_enter_scroll();
19344 
19345 	if (aborting())
19346 	    smsg((char_u *)_("%s aborted"), sourcing_name);
19347 	else if (fc.rettv->v_type == VAR_NUMBER)
19348 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
19349 					       (long)fc.rettv->vval.v_number);
19350 	else
19351 	{
19352 	    char_u	buf[MSG_BUF_LEN];
19353 	    char_u	numbuf[NUMBUFLEN];
19354 	    char_u	*tofree;
19355 
19356 	    /* The value may be very long.  Skip the middle part, so that we
19357 	     * have some idea how it starts and ends. smsg() would always
19358 	     * truncate it at the end. */
19359 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf, 0),
19360 							   buf, MSG_BUF_CLEN);
19361 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
19362 	    vim_free(tofree);
19363 	}
19364 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19365 
19366 	verbose_leave_scroll();
19367 	--no_wait_return;
19368     }
19369 
19370     vim_free(sourcing_name);
19371     sourcing_name = save_sourcing_name;
19372     sourcing_lnum = save_sourcing_lnum;
19373     current_SID = save_current_SID;
19374 #ifdef FEAT_PROFILE
19375     if (do_profiling)
19376 	script_prof_restore(&wait_start);
19377 #endif
19378 
19379     if (p_verbose >= 12 && sourcing_name != NULL)
19380     {
19381 	++no_wait_return;
19382 	verbose_enter_scroll();
19383 
19384 	smsg((char_u *)_("continuing in %s"), sourcing_name);
19385 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
19386 
19387 	verbose_leave_scroll();
19388 	--no_wait_return;
19389     }
19390 
19391     did_emsg |= save_did_emsg;
19392     current_funccal = fc.caller;
19393 
19394     /* The a: variables typevals were not alloced, only free the allocated
19395      * variables. */
19396     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
19397 
19398     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
19399     --depth;
19400 }
19401 
19402 /*
19403  * Add a number variable "name" to dict "dp" with value "nr".
19404  */
19405     static void
19406 add_nr_var(dp, v, name, nr)
19407     dict_T	*dp;
19408     dictitem_T	*v;
19409     char	*name;
19410     varnumber_T nr;
19411 {
19412     STRCPY(v->di_key, name);
19413     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
19414     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
19415     v->di_tv.v_type = VAR_NUMBER;
19416     v->di_tv.v_lock = VAR_FIXED;
19417     v->di_tv.vval.v_number = nr;
19418 }
19419 
19420 /*
19421  * ":return [expr]"
19422  */
19423     void
19424 ex_return(eap)
19425     exarg_T	*eap;
19426 {
19427     char_u	*arg = eap->arg;
19428     typval_T	rettv;
19429     int		returning = FALSE;
19430 
19431     if (current_funccal == NULL)
19432     {
19433 	EMSG(_("E133: :return not inside a function"));
19434 	return;
19435     }
19436 
19437     if (eap->skip)
19438 	++emsg_skip;
19439 
19440     eap->nextcmd = NULL;
19441     if ((*arg != NUL && *arg != '|' && *arg != '\n')
19442 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
19443     {
19444 	if (!eap->skip)
19445 	    returning = do_return(eap, FALSE, TRUE, &rettv);
19446 	else
19447 	    clear_tv(&rettv);
19448     }
19449     /* It's safer to return also on error. */
19450     else if (!eap->skip)
19451     {
19452 	/*
19453 	 * Return unless the expression evaluation has been cancelled due to an
19454 	 * aborting error, an interrupt, or an exception.
19455 	 */
19456 	if (!aborting())
19457 	    returning = do_return(eap, FALSE, TRUE, NULL);
19458     }
19459 
19460     /* When skipping or the return gets pending, advance to the next command
19461      * in this line (!returning).  Otherwise, ignore the rest of the line.
19462      * Following lines will be ignored by get_func_line(). */
19463     if (returning)
19464 	eap->nextcmd = NULL;
19465     else if (eap->nextcmd == NULL)	    /* no argument */
19466 	eap->nextcmd = check_nextcmd(arg);
19467 
19468     if (eap->skip)
19469 	--emsg_skip;
19470 }
19471 
19472 /*
19473  * Return from a function.  Possibly makes the return pending.  Also called
19474  * for a pending return at the ":endtry" or after returning from an extra
19475  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
19476  * when called due to a ":return" command.  "rettv" may point to a typval_T
19477  * with the return rettv.  Returns TRUE when the return can be carried out,
19478  * FALSE when the return gets pending.
19479  */
19480     int
19481 do_return(eap, reanimate, is_cmd, rettv)
19482     exarg_T	*eap;
19483     int		reanimate;
19484     int		is_cmd;
19485     void	*rettv;
19486 {
19487     int		idx;
19488     struct condstack *cstack = eap->cstack;
19489 
19490     if (reanimate)
19491 	/* Undo the return. */
19492 	current_funccal->returned = FALSE;
19493 
19494     /*
19495      * Cleanup (and inactivate) conditionals, but stop when a try conditional
19496      * not in its finally clause (which then is to be executed next) is found.
19497      * In this case, make the ":return" pending for execution at the ":endtry".
19498      * Otherwise, return normally.
19499      */
19500     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
19501     if (idx >= 0)
19502     {
19503 	cstack->cs_pending[idx] = CSTP_RETURN;
19504 
19505 	if (!is_cmd && !reanimate)
19506 	    /* A pending return again gets pending.  "rettv" points to an
19507 	     * allocated variable with the rettv of the original ":return"'s
19508 	     * argument if present or is NULL else. */
19509 	    cstack->cs_rettv[idx] = rettv;
19510 	else
19511 	{
19512 	    /* When undoing a return in order to make it pending, get the stored
19513 	     * return rettv. */
19514 	    if (reanimate)
19515 		rettv = current_funccal->rettv;
19516 
19517 	    if (rettv != NULL)
19518 	    {
19519 		/* Store the value of the pending return. */
19520 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
19521 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
19522 		else
19523 		    EMSG(_(e_outofmem));
19524 	    }
19525 	    else
19526 		cstack->cs_rettv[idx] = NULL;
19527 
19528 	    if (reanimate)
19529 	    {
19530 		/* The pending return value could be overwritten by a ":return"
19531 		 * without argument in a finally clause; reset the default
19532 		 * return value. */
19533 		current_funccal->rettv->v_type = VAR_NUMBER;
19534 		current_funccal->rettv->vval.v_number = 0;
19535 	    }
19536 	}
19537 	report_make_pending(CSTP_RETURN, rettv);
19538     }
19539     else
19540     {
19541 	current_funccal->returned = TRUE;
19542 
19543 	/* If the return is carried out now, store the return value.  For
19544 	 * a return immediately after reanimation, the value is already
19545 	 * there. */
19546 	if (!reanimate && rettv != NULL)
19547 	{
19548 	    clear_tv(current_funccal->rettv);
19549 	    *current_funccal->rettv = *(typval_T *)rettv;
19550 	    if (!is_cmd)
19551 		vim_free(rettv);
19552 	}
19553     }
19554 
19555     return idx < 0;
19556 }
19557 
19558 /*
19559  * Free the variable with a pending return value.
19560  */
19561     void
19562 discard_pending_return(rettv)
19563     void	*rettv;
19564 {
19565     free_tv((typval_T *)rettv);
19566 }
19567 
19568 /*
19569  * Generate a return command for producing the value of "rettv".  The result
19570  * is an allocated string.  Used by report_pending() for verbose messages.
19571  */
19572     char_u *
19573 get_return_cmd(rettv)
19574     void	*rettv;
19575 {
19576     char_u	*s = NULL;
19577     char_u	*tofree = NULL;
19578     char_u	numbuf[NUMBUFLEN];
19579 
19580     if (rettv != NULL)
19581 	s = echo_string((typval_T *)rettv, &tofree, numbuf, 0);
19582     if (s == NULL)
19583 	s = (char_u *)"";
19584 
19585     STRCPY(IObuff, ":return ");
19586     STRNCPY(IObuff + 8, s, IOSIZE - 8);
19587     if (STRLEN(s) + 8 >= IOSIZE)
19588 	STRCPY(IObuff + IOSIZE - 4, "...");
19589     vim_free(tofree);
19590     return vim_strsave(IObuff);
19591 }
19592 
19593 /*
19594  * Get next function line.
19595  * Called by do_cmdline() to get the next line.
19596  * Returns allocated string, or NULL for end of function.
19597  */
19598 /* ARGSUSED */
19599     char_u *
19600 get_func_line(c, cookie, indent)
19601     int	    c;		    /* not used */
19602     void    *cookie;
19603     int	    indent;	    /* not used */
19604 {
19605     funccall_T	*fcp = (funccall_T *)cookie;
19606     ufunc_T	*fp = fcp->func;
19607     char_u	*retval;
19608     garray_T	*gap;  /* growarray with function lines */
19609 
19610     /* If breakpoints have been added/deleted need to check for it. */
19611     if (fcp->dbg_tick != debug_tick)
19612     {
19613 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
19614 							       sourcing_lnum);
19615 	fcp->dbg_tick = debug_tick;
19616     }
19617 #ifdef FEAT_PROFILE
19618     if (do_profiling)
19619 	func_line_end(cookie);
19620 #endif
19621 
19622     gap = &fp->uf_lines;
19623     if (((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
19624 	    || fcp->returned)
19625 	retval = NULL;
19626     else
19627     {
19628 	/* Skip NULL lines (continuation lines). */
19629 	while (fcp->linenr < gap->ga_len
19630 			  && ((char_u **)(gap->ga_data))[fcp->linenr] == NULL)
19631 	    ++fcp->linenr;
19632 	if (fcp->linenr >= gap->ga_len)
19633 	    retval = NULL;
19634 	else
19635 	{
19636 	    retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
19637 	    sourcing_lnum = fcp->linenr;
19638 #ifdef FEAT_PROFILE
19639 	    if (do_profiling)
19640 		func_line_start(cookie);
19641 #endif
19642 	}
19643     }
19644 
19645     /* Did we encounter a breakpoint? */
19646     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
19647     {
19648 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
19649 	/* Find next breakpoint. */
19650 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
19651 							       sourcing_lnum);
19652 	fcp->dbg_tick = debug_tick;
19653     }
19654 
19655     return retval;
19656 }
19657 
19658 #if defined(FEAT_PROFILE) || defined(PROTO)
19659 /*
19660  * Called when starting to read a function line.
19661  * "sourcing_lnum" must be correct!
19662  * When skipping lines it may not actually be executed, but we won't find out
19663  * until later and we need to store the time now.
19664  */
19665     void
19666 func_line_start(cookie)
19667     void    *cookie;
19668 {
19669     funccall_T	*fcp = (funccall_T *)cookie;
19670     ufunc_T	*fp = fcp->func;
19671 
19672     if (fp->uf_profiling && sourcing_lnum >= 1
19673 				      && sourcing_lnum <= fp->uf_lines.ga_len)
19674     {
19675 	fp->uf_tml_idx = sourcing_lnum - 1;
19676 	/* Skip continuation lines. */
19677 	while (fp->uf_tml_idx > 0 && FUNCLINE(fp, fp->uf_tml_idx) == NULL)
19678 	    --fp->uf_tml_idx;
19679 	fp->uf_tml_execed = FALSE;
19680 	profile_start(&fp->uf_tml_start);
19681 	profile_zero(&fp->uf_tml_children);
19682 	profile_get_wait(&fp->uf_tml_wait);
19683     }
19684 }
19685 
19686 /*
19687  * Called when actually executing a function line.
19688  */
19689     void
19690 func_line_exec(cookie)
19691     void    *cookie;
19692 {
19693     funccall_T	*fcp = (funccall_T *)cookie;
19694     ufunc_T	*fp = fcp->func;
19695 
19696     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
19697 	fp->uf_tml_execed = TRUE;
19698 }
19699 
19700 /*
19701  * Called when done with a function line.
19702  */
19703     void
19704 func_line_end(cookie)
19705     void    *cookie;
19706 {
19707     funccall_T	*fcp = (funccall_T *)cookie;
19708     ufunc_T	*fp = fcp->func;
19709 
19710     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
19711     {
19712 	if (fp->uf_tml_execed)
19713 	{
19714 	    ++fp->uf_tml_count[fp->uf_tml_idx];
19715 	    profile_end(&fp->uf_tml_start);
19716 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
19717 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
19718 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
19719 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
19720 	}
19721 	fp->uf_tml_idx = -1;
19722     }
19723 }
19724 #endif
19725 
19726 /*
19727  * Return TRUE if the currently active function should be ended, because a
19728  * return was encountered or an error occured.  Used inside a ":while".
19729  */
19730     int
19731 func_has_ended(cookie)
19732     void    *cookie;
19733 {
19734     funccall_T  *fcp = (funccall_T *)cookie;
19735 
19736     /* Ignore the "abort" flag if the abortion behavior has been changed due to
19737      * an error inside a try conditional. */
19738     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
19739 	    || fcp->returned);
19740 }
19741 
19742 /*
19743  * return TRUE if cookie indicates a function which "abort"s on errors.
19744  */
19745     int
19746 func_has_abort(cookie)
19747     void    *cookie;
19748 {
19749     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
19750 }
19751 
19752 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
19753 typedef enum
19754 {
19755     VAR_FLAVOUR_DEFAULT,
19756     VAR_FLAVOUR_SESSION,
19757     VAR_FLAVOUR_VIMINFO
19758 } var_flavour_T;
19759 
19760 static var_flavour_T var_flavour __ARGS((char_u *varname));
19761 
19762     static var_flavour_T
19763 var_flavour(varname)
19764     char_u *varname;
19765 {
19766     char_u *p = varname;
19767 
19768     if (ASCII_ISUPPER(*p))
19769     {
19770 	while (*(++p))
19771 	    if (ASCII_ISLOWER(*p))
19772 		return VAR_FLAVOUR_SESSION;
19773 	return VAR_FLAVOUR_VIMINFO;
19774     }
19775     else
19776 	return VAR_FLAVOUR_DEFAULT;
19777 }
19778 #endif
19779 
19780 #if defined(FEAT_VIMINFO) || defined(PROTO)
19781 /*
19782  * Restore global vars that start with a capital from the viminfo file
19783  */
19784     int
19785 read_viminfo_varlist(virp, writing)
19786     vir_T	*virp;
19787     int		writing;
19788 {
19789     char_u	*tab;
19790     int		is_string = FALSE;
19791     typval_T	tv;
19792 
19793     if (!writing && (find_viminfo_parameter('!') != NULL))
19794     {
19795 	tab = vim_strchr(virp->vir_line + 1, '\t');
19796 	if (tab != NULL)
19797 	{
19798 	    *tab++ = '\0';	/* isolate the variable name */
19799 	    if (*tab == 'S')	/* string var */
19800 		is_string = TRUE;
19801 
19802 	    tab = vim_strchr(tab, '\t');
19803 	    if (tab != NULL)
19804 	    {
19805 		if (is_string)
19806 		{
19807 		    tv.v_type = VAR_STRING;
19808 		    tv.vval.v_string = viminfo_readstring(virp,
19809 				       (int)(tab - virp->vir_line + 1), TRUE);
19810 		}
19811 		else
19812 		{
19813 		    tv.v_type = VAR_NUMBER;
19814 		    tv.vval.v_number = atol((char *)tab + 1);
19815 		}
19816 		set_var(virp->vir_line + 1, &tv, FALSE);
19817 		if (is_string)
19818 		    vim_free(tv.vval.v_string);
19819 	    }
19820 	}
19821     }
19822 
19823     return viminfo_readline(virp);
19824 }
19825 
19826 /*
19827  * Write global vars that start with a capital to the viminfo file
19828  */
19829     void
19830 write_viminfo_varlist(fp)
19831     FILE    *fp;
19832 {
19833     hashitem_T	*hi;
19834     dictitem_T	*this_var;
19835     int		todo;
19836     char	*s;
19837     char_u	*p;
19838     char_u	*tofree;
19839     char_u	numbuf[NUMBUFLEN];
19840 
19841     if (find_viminfo_parameter('!') == NULL)
19842 	return;
19843 
19844     fprintf(fp, _("\n# global variables:\n"));
19845 
19846     todo = globvarht.ht_used;
19847     for (hi = globvarht.ht_array; todo > 0; ++hi)
19848     {
19849 	if (!HASHITEM_EMPTY(hi))
19850 	{
19851 	    --todo;
19852 	    this_var = HI2DI(hi);
19853 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
19854 	    {
19855 		switch (this_var->di_tv.v_type)
19856 		{
19857 		    case VAR_STRING: s = "STR"; break;
19858 		    case VAR_NUMBER: s = "NUM"; break;
19859 		    default: continue;
19860 		}
19861 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
19862 		p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
19863 		if (p != NULL)
19864 		    viminfo_writestring(fp, p);
19865 		vim_free(tofree);
19866 	    }
19867 	}
19868     }
19869 }
19870 #endif
19871 
19872 #if defined(FEAT_SESSION) || defined(PROTO)
19873     int
19874 store_session_globals(fd)
19875     FILE	*fd;
19876 {
19877     hashitem_T	*hi;
19878     dictitem_T	*this_var;
19879     int		todo;
19880     char_u	*p, *t;
19881 
19882     todo = globvarht.ht_used;
19883     for (hi = globvarht.ht_array; todo > 0; ++hi)
19884     {
19885 	if (!HASHITEM_EMPTY(hi))
19886 	{
19887 	    --todo;
19888 	    this_var = HI2DI(hi);
19889 	    if ((this_var->di_tv.v_type == VAR_NUMBER
19890 			|| this_var->di_tv.v_type == VAR_STRING)
19891 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
19892 	    {
19893 		/* Escape special characters with a backslash.  Turn a LF and
19894 		 * CR into \n and \r. */
19895 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
19896 							(char_u *)"\\\"\n\r");
19897 		if (p == NULL)	    /* out of memory */
19898 		    break;
19899 		for (t = p; *t != NUL; ++t)
19900 		    if (*t == '\n')
19901 			*t = 'n';
19902 		    else if (*t == '\r')
19903 			*t = 'r';
19904 		if ((fprintf(fd, "let %s = %c%s%c",
19905 				this_var->di_key,
19906 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
19907 									: ' ',
19908 				p,
19909 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
19910 								   : ' ') < 0)
19911 			|| put_eol(fd) == FAIL)
19912 		{
19913 		    vim_free(p);
19914 		    return FAIL;
19915 		}
19916 		vim_free(p);
19917 	    }
19918 	}
19919     }
19920     return OK;
19921 }
19922 #endif
19923 
19924 /*
19925  * Display script name where an item was last set.
19926  * Should only be invoked when 'verbose' is non-zero.
19927  */
19928     void
19929 last_set_msg(scriptID)
19930     scid_T scriptID;
19931 {
19932     char_u *p;
19933 
19934     if (scriptID != 0)
19935     {
19936 	p = home_replace_save(NULL, get_scriptname(scriptID));
19937 	if (p != NULL)
19938 	{
19939 	    verbose_enter();
19940 	    MSG_PUTS(_("\n\tLast set from "));
19941 	    MSG_PUTS(p);
19942 	    vim_free(p);
19943 	    verbose_leave();
19944 	}
19945     }
19946 }
19947 
19948 #endif /* FEAT_EVAL */
19949 
19950 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
19951 
19952 
19953 #ifdef WIN3264
19954 /*
19955  * Functions for ":8" filename modifier: get 8.3 version of a filename.
19956  */
19957 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
19958 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
19959 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
19960 
19961 /*
19962  * Get the short pathname of a file.
19963  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
19964  */
19965     static int
19966 get_short_pathname(fnamep, bufp, fnamelen)
19967     char_u	**fnamep;
19968     char_u	**bufp;
19969     int		*fnamelen;
19970 {
19971     int		l,len;
19972     char_u	*newbuf;
19973 
19974     len = *fnamelen;
19975 
19976     l = GetShortPathName(*fnamep, *fnamep, len);
19977     if (l > len - 1)
19978     {
19979 	/* If that doesn't work (not enough space), then save the string
19980 	 * and try again with a new buffer big enough
19981 	 */
19982 	newbuf = vim_strnsave(*fnamep, l);
19983 	if (newbuf == NULL)
19984 	    return 0;
19985 
19986 	vim_free(*bufp);
19987 	*fnamep = *bufp = newbuf;
19988 
19989 	l = GetShortPathName(*fnamep,*fnamep,l+1);
19990 
19991 	/* Really should always succeed, as the buffer is big enough */
19992     }
19993 
19994     *fnamelen = l;
19995     return 1;
19996 }
19997 
19998 /*
19999  * Create a short path name.  Returns the length of the buffer it needs.
20000  * Doesn't copy over the end of the buffer passed in.
20001  */
20002     static int
20003 shortpath_for_invalid_fname(fname, bufp, fnamelen)
20004     char_u	**fname;
20005     char_u	**bufp;
20006     int		*fnamelen;
20007 {
20008     char_u	*s, *p, *pbuf2, *pbuf3;
20009     char_u	ch;
20010     int		len, len2, plen, slen;
20011 
20012     /* Make a copy */
20013     len2 = *fnamelen;
20014     pbuf2 = vim_strnsave(*fname, len2);
20015     pbuf3 = NULL;
20016 
20017     s = pbuf2 + len2 - 1; /* Find the end */
20018     slen = 1;
20019     plen = len2;
20020 
20021     if (after_pathsep(pbuf2, s + 1))
20022     {
20023 	--s;
20024 	++slen;
20025 	--plen;
20026     }
20027 
20028     do
20029     {
20030 	/* Go back one path-seperator */
20031 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
20032 	{
20033 	    --s;
20034 	    ++slen;
20035 	    --plen;
20036 	}
20037 	if (s <= pbuf2)
20038 	    break;
20039 
20040 	/* Remeber the character that is about to be blatted */
20041 	ch = *s;
20042 	*s = 0; /* get_short_pathname requires a null-terminated string */
20043 
20044 	/* Try it in situ */
20045 	p = pbuf2;
20046 	if (!get_short_pathname(&p, &pbuf3, &plen))
20047 	{
20048 	    vim_free(pbuf2);
20049 	    return -1;
20050 	}
20051 	*s = ch;    /* Preserve the string */
20052     } while (plen == 0);
20053 
20054     if (plen > 0)
20055     {
20056 	/* Remeber the length of the new string.  */
20057 	*fnamelen = len = plen + slen;
20058 	vim_free(*bufp);
20059 	if (len > len2)
20060 	{
20061 	    /* If there's not enough space in the currently allocated string,
20062 	     * then copy it to a buffer big enough.
20063 	     */
20064 	    *fname= *bufp = vim_strnsave(p, len);
20065 	    if (*fname == NULL)
20066 		return -1;
20067 	}
20068 	else
20069 	{
20070 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
20071 	    *fname = *bufp = pbuf2;
20072 	    if (p != pbuf2)
20073 		strncpy(*fname, p, plen);
20074 	    pbuf2 = NULL;
20075 	}
20076 	/* Concat the next bit */
20077 	strncpy(*fname + plen, s, slen);
20078 	(*fname)[len] = '\0';
20079     }
20080     vim_free(pbuf3);
20081     vim_free(pbuf2);
20082     return 0;
20083 }
20084 
20085 /*
20086  * Get a pathname for a partial path.
20087  */
20088     static int
20089 shortpath_for_partial(fnamep, bufp, fnamelen)
20090     char_u	**fnamep;
20091     char_u	**bufp;
20092     int		*fnamelen;
20093 {
20094     int		sepcount, len, tflen;
20095     char_u	*p;
20096     char_u	*pbuf, *tfname;
20097     int		hasTilde;
20098 
20099     /* Count up the path seperators from the RHS.. so we know which part
20100      * of the path to return.
20101      */
20102     sepcount = 0;
20103     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
20104 	if (vim_ispathsep(*p))
20105 	    ++sepcount;
20106 
20107     /* Need full path first (use expand_env() to remove a "~/") */
20108     hasTilde = (**fnamep == '~');
20109     if (hasTilde)
20110 	pbuf = tfname = expand_env_save(*fnamep);
20111     else
20112 	pbuf = tfname = FullName_save(*fnamep, FALSE);
20113 
20114     len = tflen = STRLEN(tfname);
20115 
20116     if (!get_short_pathname(&tfname, &pbuf, &len))
20117 	return -1;
20118 
20119     if (len == 0)
20120     {
20121 	/* Don't have a valid filename, so shorten the rest of the
20122 	 * path if we can. This CAN give us invalid 8.3 filenames, but
20123 	 * there's not a lot of point in guessing what it might be.
20124 	 */
20125 	len = tflen;
20126 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
20127 	    return -1;
20128     }
20129 
20130     /* Count the paths backward to find the beginning of the desired string. */
20131     for (p = tfname + len - 1; p >= tfname; --p)
20132     {
20133 #ifdef FEAT_MBYTE
20134 	if (has_mbyte)
20135 	    p -= mb_head_off(tfname, p);
20136 #endif
20137 	if (vim_ispathsep(*p))
20138 	{
20139 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
20140 		break;
20141 	    else
20142 		sepcount --;
20143 	}
20144     }
20145     if (hasTilde)
20146     {
20147 	--p;
20148 	if (p >= tfname)
20149 	    *p = '~';
20150 	else
20151 	    return -1;
20152     }
20153     else
20154 	++p;
20155 
20156     /* Copy in the string - p indexes into tfname - allocated at pbuf */
20157     vim_free(*bufp);
20158     *fnamelen = (int)STRLEN(p);
20159     *bufp = pbuf;
20160     *fnamep = p;
20161 
20162     return 0;
20163 }
20164 #endif /* WIN3264 */
20165 
20166 /*
20167  * Adjust a filename, according to a string of modifiers.
20168  * *fnamep must be NUL terminated when called.  When returning, the length is
20169  * determined by *fnamelen.
20170  * Returns valid flags.
20171  * When there is an error, *fnamep is set to NULL.
20172  */
20173     int
20174 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
20175     char_u	*src;		/* string with modifiers */
20176     int		*usedlen;	/* characters after src that are used */
20177     char_u	**fnamep;	/* file name so far */
20178     char_u	**bufp;		/* buffer for allocated file name or NULL */
20179     int		*fnamelen;	/* length of fnamep */
20180 {
20181     int		valid = 0;
20182     char_u	*tail;
20183     char_u	*s, *p, *pbuf;
20184     char_u	dirname[MAXPATHL];
20185     int		c;
20186     int		has_fullname = 0;
20187 #ifdef WIN3264
20188     int		has_shortname = 0;
20189 #endif
20190 
20191 repeat:
20192     /* ":p" - full path/file_name */
20193     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
20194     {
20195 	has_fullname = 1;
20196 
20197 	valid |= VALID_PATH;
20198 	*usedlen += 2;
20199 
20200 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
20201 	if ((*fnamep)[0] == '~'
20202 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
20203 		&& ((*fnamep)[1] == '/'
20204 # ifdef BACKSLASH_IN_FILENAME
20205 		    || (*fnamep)[1] == '\\'
20206 # endif
20207 		    || (*fnamep)[1] == NUL)
20208 
20209 #endif
20210 	   )
20211 	{
20212 	    *fnamep = expand_env_save(*fnamep);
20213 	    vim_free(*bufp);	/* free any allocated file name */
20214 	    *bufp = *fnamep;
20215 	    if (*fnamep == NULL)
20216 		return -1;
20217 	}
20218 
20219 	/* When "/." or "/.." is used: force expansion to get rid of it. */
20220 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
20221 	{
20222 	    if (vim_ispathsep(*p)
20223 		    && p[1] == '.'
20224 		    && (p[2] == NUL
20225 			|| vim_ispathsep(p[2])
20226 			|| (p[2] == '.'
20227 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
20228 		break;
20229 	}
20230 
20231 	/* FullName_save() is slow, don't use it when not needed. */
20232 	if (*p != NUL || !vim_isAbsName(*fnamep))
20233 	{
20234 	    *fnamep = FullName_save(*fnamep, *p != NUL);
20235 	    vim_free(*bufp);	/* free any allocated file name */
20236 	    *bufp = *fnamep;
20237 	    if (*fnamep == NULL)
20238 		return -1;
20239 	}
20240 
20241 	/* Append a path separator to a directory. */
20242 	if (mch_isdir(*fnamep))
20243 	{
20244 	    /* Make room for one or two extra characters. */
20245 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
20246 	    vim_free(*bufp);	/* free any allocated file name */
20247 	    *bufp = *fnamep;
20248 	    if (*fnamep == NULL)
20249 		return -1;
20250 	    add_pathsep(*fnamep);
20251 	}
20252     }
20253 
20254     /* ":." - path relative to the current directory */
20255     /* ":~" - path relative to the home directory */
20256     /* ":8" - shortname path - postponed till after */
20257     while (src[*usedlen] == ':'
20258 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
20259     {
20260 	*usedlen += 2;
20261 	if (c == '8')
20262 	{
20263 #ifdef WIN3264
20264 	    has_shortname = 1; /* Postpone this. */
20265 #endif
20266 	    continue;
20267 	}
20268 	pbuf = NULL;
20269 	/* Need full path first (use expand_env() to remove a "~/") */
20270 	if (!has_fullname)
20271 	{
20272 	    if (c == '.' && **fnamep == '~')
20273 		p = pbuf = expand_env_save(*fnamep);
20274 	    else
20275 		p = pbuf = FullName_save(*fnamep, FALSE);
20276 	}
20277 	else
20278 	    p = *fnamep;
20279 
20280 	has_fullname = 0;
20281 
20282 	if (p != NULL)
20283 	{
20284 	    if (c == '.')
20285 	    {
20286 		mch_dirname(dirname, MAXPATHL);
20287 		s = shorten_fname(p, dirname);
20288 		if (s != NULL)
20289 		{
20290 		    *fnamep = s;
20291 		    if (pbuf != NULL)
20292 		    {
20293 			vim_free(*bufp);   /* free any allocated file name */
20294 			*bufp = pbuf;
20295 			pbuf = NULL;
20296 		    }
20297 		}
20298 	    }
20299 	    else
20300 	    {
20301 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
20302 		/* Only replace it when it starts with '~' */
20303 		if (*dirname == '~')
20304 		{
20305 		    s = vim_strsave(dirname);
20306 		    if (s != NULL)
20307 		    {
20308 			*fnamep = s;
20309 			vim_free(*bufp);
20310 			*bufp = s;
20311 		    }
20312 		}
20313 	    }
20314 	    vim_free(pbuf);
20315 	}
20316     }
20317 
20318     tail = gettail(*fnamep);
20319     *fnamelen = (int)STRLEN(*fnamep);
20320 
20321     /* ":h" - head, remove "/file_name", can be repeated  */
20322     /* Don't remove the first "/" or "c:\" */
20323     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
20324     {
20325 	valid |= VALID_HEAD;
20326 	*usedlen += 2;
20327 	s = get_past_head(*fnamep);
20328 	while (tail > s && after_pathsep(s, tail))
20329 	    --tail;
20330 	*fnamelen = (int)(tail - *fnamep);
20331 #ifdef VMS
20332 	if (*fnamelen > 0)
20333 	    *fnamelen += 1; /* the path separator is part of the path */
20334 #endif
20335 	while (tail > s && !after_pathsep(s, tail))
20336 	    mb_ptr_back(*fnamep, tail);
20337     }
20338 
20339     /* ":8" - shortname  */
20340     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
20341     {
20342 	*usedlen += 2;
20343 #ifdef WIN3264
20344 	has_shortname = 1;
20345 #endif
20346     }
20347 
20348 #ifdef WIN3264
20349     /* Check shortname after we have done 'heads' and before we do 'tails'
20350      */
20351     if (has_shortname)
20352     {
20353 	pbuf = NULL;
20354 	/* Copy the string if it is shortened by :h */
20355 	if (*fnamelen < (int)STRLEN(*fnamep))
20356 	{
20357 	    p = vim_strnsave(*fnamep, *fnamelen);
20358 	    if (p == 0)
20359 		return -1;
20360 	    vim_free(*bufp);
20361 	    *bufp = *fnamep = p;
20362 	}
20363 
20364 	/* Split into two implementations - makes it easier.  First is where
20365 	 * there isn't a full name already, second is where there is.
20366 	 */
20367 	if (!has_fullname && !vim_isAbsName(*fnamep))
20368 	{
20369 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
20370 		return -1;
20371 	}
20372 	else
20373 	{
20374 	    int		l;
20375 
20376 	    /* Simple case, already have the full-name
20377 	     * Nearly always shorter, so try first time. */
20378 	    l = *fnamelen;
20379 	    if (!get_short_pathname(fnamep, bufp, &l))
20380 		return -1;
20381 
20382 	    if (l == 0)
20383 	    {
20384 		/* Couldn't find the filename.. search the paths.
20385 		 */
20386 		l = *fnamelen;
20387 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
20388 		    return -1;
20389 	    }
20390 	    *fnamelen = l;
20391 	}
20392     }
20393 #endif /* WIN3264 */
20394 
20395     /* ":t" - tail, just the basename */
20396     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
20397     {
20398 	*usedlen += 2;
20399 	*fnamelen -= (int)(tail - *fnamep);
20400 	*fnamep = tail;
20401     }
20402 
20403     /* ":e" - extension, can be repeated */
20404     /* ":r" - root, without extension, can be repeated */
20405     while (src[*usedlen] == ':'
20406 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
20407     {
20408 	/* find a '.' in the tail:
20409 	 * - for second :e: before the current fname
20410 	 * - otherwise: The last '.'
20411 	 */
20412 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
20413 	    s = *fnamep - 2;
20414 	else
20415 	    s = *fnamep + *fnamelen - 1;
20416 	for ( ; s > tail; --s)
20417 	    if (s[0] == '.')
20418 		break;
20419 	if (src[*usedlen + 1] == 'e')		/* :e */
20420 	{
20421 	    if (s > tail)
20422 	    {
20423 		*fnamelen += (int)(*fnamep - (s + 1));
20424 		*fnamep = s + 1;
20425 #ifdef VMS
20426 		/* cut version from the extension */
20427 		s = *fnamep + *fnamelen - 1;
20428 		for ( ; s > *fnamep; --s)
20429 		    if (s[0] == ';')
20430 			break;
20431 		if (s > *fnamep)
20432 		    *fnamelen = s - *fnamep;
20433 #endif
20434 	    }
20435 	    else if (*fnamep <= tail)
20436 		*fnamelen = 0;
20437 	}
20438 	else				/* :r */
20439 	{
20440 	    if (s > tail)	/* remove one extension */
20441 		*fnamelen = (int)(s - *fnamep);
20442 	}
20443 	*usedlen += 2;
20444     }
20445 
20446     /* ":s?pat?foo?" - substitute */
20447     /* ":gs?pat?foo?" - global substitute */
20448     if (src[*usedlen] == ':'
20449 	    && (src[*usedlen + 1] == 's'
20450 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
20451     {
20452 	char_u	    *str;
20453 	char_u	    *pat;
20454 	char_u	    *sub;
20455 	int	    sep;
20456 	char_u	    *flags;
20457 	int	    didit = FALSE;
20458 
20459 	flags = (char_u *)"";
20460 	s = src + *usedlen + 2;
20461 	if (src[*usedlen + 1] == 'g')
20462 	{
20463 	    flags = (char_u *)"g";
20464 	    ++s;
20465 	}
20466 
20467 	sep = *s++;
20468 	if (sep)
20469 	{
20470 	    /* find end of pattern */
20471 	    p = vim_strchr(s, sep);
20472 	    if (p != NULL)
20473 	    {
20474 		pat = vim_strnsave(s, (int)(p - s));
20475 		if (pat != NULL)
20476 		{
20477 		    s = p + 1;
20478 		    /* find end of substitution */
20479 		    p = vim_strchr(s, sep);
20480 		    if (p != NULL)
20481 		    {
20482 			sub = vim_strnsave(s, (int)(p - s));
20483 			str = vim_strnsave(*fnamep, *fnamelen);
20484 			if (sub != NULL && str != NULL)
20485 			{
20486 			    *usedlen = (int)(p + 1 - src);
20487 			    s = do_string_sub(str, pat, sub, flags);
20488 			    if (s != NULL)
20489 			    {
20490 				*fnamep = s;
20491 				*fnamelen = (int)STRLEN(s);
20492 				vim_free(*bufp);
20493 				*bufp = s;
20494 				didit = TRUE;
20495 			    }
20496 			}
20497 			vim_free(sub);
20498 			vim_free(str);
20499 		    }
20500 		    vim_free(pat);
20501 		}
20502 	    }
20503 	    /* after using ":s", repeat all the modifiers */
20504 	    if (didit)
20505 		goto repeat;
20506 	}
20507     }
20508 
20509     return valid;
20510 }
20511 
20512 /*
20513  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
20514  * "flags" can be "g" to do a global substitute.
20515  * Returns an allocated string, NULL for error.
20516  */
20517     char_u *
20518 do_string_sub(str, pat, sub, flags)
20519     char_u	*str;
20520     char_u	*pat;
20521     char_u	*sub;
20522     char_u	*flags;
20523 {
20524     int		sublen;
20525     regmatch_T	regmatch;
20526     int		i;
20527     int		do_all;
20528     char_u	*tail;
20529     garray_T	ga;
20530     char_u	*ret;
20531     char_u	*save_cpo;
20532 
20533     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
20534     save_cpo = p_cpo;
20535     p_cpo = (char_u *)"";
20536 
20537     ga_init2(&ga, 1, 200);
20538 
20539     do_all = (flags[0] == 'g');
20540 
20541     regmatch.rm_ic = p_ic;
20542     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
20543     if (regmatch.regprog != NULL)
20544     {
20545 	tail = str;
20546 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
20547 	{
20548 	    /*
20549 	     * Get some space for a temporary buffer to do the substitution
20550 	     * into.  It will contain:
20551 	     * - The text up to where the match is.
20552 	     * - The substituted text.
20553 	     * - The text after the match.
20554 	     */
20555 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
20556 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
20557 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
20558 	    {
20559 		ga_clear(&ga);
20560 		break;
20561 	    }
20562 
20563 	    /* copy the text up to where the match is */
20564 	    i = (int)(regmatch.startp[0] - tail);
20565 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
20566 	    /* add the substituted text */
20567 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
20568 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
20569 	    ga.ga_len += i + sublen - 1;
20570 	    /* avoid getting stuck on a match with an empty string */
20571 	    if (tail == regmatch.endp[0])
20572 	    {
20573 		if (*tail == NUL)
20574 		    break;
20575 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
20576 		++ga.ga_len;
20577 	    }
20578 	    else
20579 	    {
20580 		tail = regmatch.endp[0];
20581 		if (*tail == NUL)
20582 		    break;
20583 	    }
20584 	    if (!do_all)
20585 		break;
20586 	}
20587 
20588 	if (ga.ga_data != NULL)
20589 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
20590 
20591 	vim_free(regmatch.regprog);
20592     }
20593 
20594     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
20595     ga_clear(&ga);
20596     p_cpo = save_cpo;
20597 
20598     return ret;
20599 }
20600 
20601 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
20602