xref: /vim-8.2.3635/src/eval.c (revision 0fa313a7) 
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 <io.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 };
341 
342 /* shorthand */
343 #define vv_type	vv_di.di_tv.v_type
344 #define vv_nr	vv_di.di_tv.vval.v_number
345 #define vv_str	vv_di.di_tv.vval.v_string
346 #define vv_tv	vv_di.di_tv
347 
348 /*
349  * The v: variables are stored in dictionary "vimvardict".
350  * "vimvars_var" is the variable that is used for the "l:" scope.
351  */
352 static dict_T		vimvardict;
353 static dictitem_T	vimvars_var;
354 #define vimvarht  vimvardict.dv_hashtab
355 
356 static void prepare_vimvar __ARGS((int idx, typval_T *save_tv));
357 static void restore_vimvar __ARGS((int idx, typval_T *save_tv));
358 #if defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)
359 static int call_vim_function __ARGS((char_u *func, int argc, char_u **argv, int safe, typval_T *rettv));
360 #endif
361 static int ex_let_vars __ARGS((char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars));
362 static char_u *skip_var_list __ARGS((char_u *arg, int *var_count, int *semicolon));
363 static char_u *skip_var_one __ARGS((char_u *arg));
364 static void list_hashtable_vars __ARGS((hashtab_T *ht, char_u *prefix, int empty));
365 static void list_glob_vars __ARGS((void));
366 static void list_buf_vars __ARGS((void));
367 static void list_win_vars __ARGS((void));
368 static void list_vim_vars __ARGS((void));
369 static char_u *list_arg_vars __ARGS((exarg_T *eap, char_u *arg));
370 static char_u *ex_let_one __ARGS((char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op));
371 static int check_changedtick __ARGS((char_u *arg));
372 static char_u *get_lval __ARGS((char_u *name, typval_T *rettv, lval_T *lp, int unlet, int skip, int quiet, int fne_flags));
373 static void clear_lval __ARGS((lval_T *lp));
374 static void set_var_lval __ARGS((lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op));
375 static int tv_op __ARGS((typval_T *tv1, typval_T *tv2, char_u  *op));
376 static void list_add_watch __ARGS((list_T *l, listwatch_T *lw));
377 static void list_rem_watch __ARGS((list_T *l, listwatch_T *lwrem));
378 static void list_fix_watch __ARGS((list_T *l, listitem_T *item));
379 static void ex_unletlock __ARGS((exarg_T *eap, char_u *argstart, int deep));
380 static int do_unlet_var __ARGS((lval_T *lp, char_u *name_end, int forceit));
381 static int do_lock_var __ARGS((lval_T *lp, char_u *name_end, int deep, int lock));
382 static void item_lock __ARGS((typval_T *tv, int deep, int lock));
383 static int tv_islocked __ARGS((typval_T *tv));
384 
385 static int eval0 __ARGS((char_u *arg,  typval_T *rettv, char_u **nextcmd, int evaluate));
386 static int eval1 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
387 static int eval2 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
388 static int eval3 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
389 static int eval4 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
390 static int eval5 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
391 static int eval6 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
392 static int eval7 __ARGS((char_u **arg, typval_T *rettv, int evaluate));
393 
394 static int eval_index __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
395 static int get_option_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
396 static int get_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
397 static int get_lit_string_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
398 static int get_list_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
399 static list_T *list_alloc __ARGS((void));
400 static void list_free __ARGS((list_T *l));
401 static listitem_T *listitem_alloc __ARGS((void));
402 static void listitem_free __ARGS((listitem_T *item));
403 static void listitem_remove __ARGS((list_T *l, listitem_T *item));
404 static long list_len __ARGS((list_T *l));
405 static int list_equal __ARGS((list_T *l1, list_T *l2, int ic));
406 static int dict_equal __ARGS((dict_T *d1, dict_T *d2, int ic));
407 static int tv_equal __ARGS((typval_T *tv1, typval_T *tv2, int ic));
408 static listitem_T *list_find __ARGS((list_T *l, long n));
409 static long list_idx_of_item __ARGS((list_T *l, listitem_T *item));
410 static void list_append __ARGS((list_T *l, listitem_T *item));
411 static int list_append_tv __ARGS((list_T *l, typval_T *tv));
412 static int list_insert_tv __ARGS((list_T *l, typval_T *tv, listitem_T *item));
413 static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
414 static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
415 static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
416 static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
417 static char_u *list2string __ARGS((typval_T *tv));
418 static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo));
419 static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
420 static void set_ref_in_list __ARGS((list_T *l, int copyID));
421 static void set_ref_in_item __ARGS((typval_T *tv, int copyID));
422 static void dict_unref __ARGS((dict_T *d));
423 static void dict_free __ARGS((dict_T *d));
424 static dictitem_T *dictitem_alloc __ARGS((char_u *key));
425 static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
426 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
427 static void dictitem_free __ARGS((dictitem_T *item));
428 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
429 static int dict_add __ARGS((dict_T *d, dictitem_T *item));
430 static long dict_len __ARGS((dict_T *d));
431 static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
432 static char_u *dict2string __ARGS((typval_T *tv));
433 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
434 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf));
435 static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf));
436 static char_u *string_quote __ARGS((char_u *str, int function));
437 static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
438 static int find_internal_func __ARGS((char_u *name));
439 static char_u *deref_func_name __ARGS((char_u *name, int *lenp));
440 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));
441 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));
442 static void emsg_funcname __ARGS((char *msg, char_u *name));
443 
444 static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
445 static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
446 static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
447 static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
448 static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
449 static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
450 static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
451 static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
452 static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
453 static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
454 static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
455 static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
456 static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
457 static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
458 static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
459 static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
460 static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
461 static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
462 static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
463 #if defined(FEAT_INS_EXPAND)
464 static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
465 static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
466 #endif
467 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
468 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
469 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
470 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
472 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
473 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
476 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
477 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
478 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
480 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
481 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
482 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
486 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
558 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
559 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
560 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
561 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
562 #ifdef vim_mkdir
563 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
564 #endif
565 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
594 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
595 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
596 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
598 #ifdef HAVE_STRFTIME
599 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
600 #endif
601 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
629 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
630 
631 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum));
632 static int get_env_len __ARGS((char_u **arg));
633 static int get_id_len __ARGS((char_u **arg));
634 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
635 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
636 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
637 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
638 				   valid character */
639 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
640 static int eval_isnamec __ARGS((int c));
641 static int eval_isnamec1 __ARGS((int c));
642 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
643 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
644 static typval_T *alloc_tv __ARGS((void));
645 static typval_T *alloc_string_tv __ARGS((char_u *string));
646 static void free_tv __ARGS((typval_T *varp));
647 static void init_tv __ARGS((typval_T *varp));
648 static long get_tv_number __ARGS((typval_T *varp));
649 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
650 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
651 static char_u *get_tv_string __ARGS((typval_T *varp));
652 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
653 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
654 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
655 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
656 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
657 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
658 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
659 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
660 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
661 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
662 static int var_check_ro __ARGS((int flags, char_u *name));
663 static int tv_check_lock __ARGS((int lock, char_u *name));
664 static void copy_tv __ARGS((typval_T *from, typval_T *to));
665 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
666 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
667 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
668 static int eval_fname_script __ARGS((char_u *p));
669 static int eval_fname_sid __ARGS((char_u *p));
670 static void list_func_head __ARGS((ufunc_T *fp, int indent));
671 static ufunc_T *find_func __ARGS((char_u *name));
672 static int function_exists __ARGS((char_u *name));
673 static int builtin_function __ARGS((char_u *name));
674 #ifdef FEAT_PROFILE
675 static void func_do_profile __ARGS((ufunc_T *fp));
676 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
677 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
678 static int
679 # ifdef __BORLANDC__
680     _RTLENTRYF
681 # endif
682 	prof_total_cmp __ARGS((const void *s1, const void *s2));
683 static int
684 # ifdef __BORLANDC__
685     _RTLENTRYF
686 # endif
687 	prof_self_cmp __ARGS((const void *s1, const void *s2));
688 #endif
689 static int script_autoload __ARGS((char_u *name, int reload));
690 static char_u *autoload_name __ARGS((char_u *name));
691 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
692 static void func_free __ARGS((ufunc_T *fp));
693 static void func_unref __ARGS((char_u *name));
694 static void func_ref __ARGS((char_u *name));
695 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));
696 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
697 
698 /* Character used as separated in autoload function/variable names. */
699 #define AUTOLOAD_CHAR '#'
700 
701 /*
702  * Initialize the global and v: variables.
703  */
704     void
705 eval_init()
706 {
707     int		    i;
708     struct vimvar   *p;
709 
710     init_var_dict(&globvardict, &globvars_var);
711     init_var_dict(&vimvardict, &vimvars_var);
712     hash_init(&compat_hashtab);
713     hash_init(&func_hashtab);
714 
715     for (i = 0; i < VV_LEN; ++i)
716     {
717 	p = &vimvars[i];
718 	STRCPY(p->vv_di.di_key, p->vv_name);
719 	if (p->vv_flags & VV_RO)
720 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
721 	else if (p->vv_flags & VV_RO_SBX)
722 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
723 	else
724 	    p->vv_di.di_flags = DI_FLAGS_FIX;
725 
726 	/* add to v: scope dict, unless the value is not always available */
727 	if (p->vv_type != VAR_UNKNOWN)
728 	    hash_add(&vimvarht, p->vv_di.di_key);
729 	if (p->vv_flags & VV_COMPAT)
730 	    /* add to compat scope dict */
731 	    hash_add(&compat_hashtab, p->vv_di.di_key);
732     }
733 }
734 
735 #if defined(EXITFREE) || defined(PROTO)
736     void
737 eval_clear()
738 {
739     int		    i;
740     struct vimvar   *p;
741 
742     for (i = 0; i < VV_LEN; ++i)
743     {
744 	p = &vimvars[i];
745 	if (p->vv_di.di_tv.v_type == VAR_STRING)
746 	{
747 	    vim_free(p->vv_di.di_tv.vval.v_string);
748 	    p->vv_di.di_tv.vval.v_string = NULL;
749 	}
750     }
751     hash_clear(&vimvarht);
752     hash_clear(&compat_hashtab);
753 
754     /* script-local variables */
755     for (i = 1; i <= ga_scripts.ga_len; ++i)
756 	vars_clear(&SCRIPT_VARS(i));
757     ga_clear(&ga_scripts);
758     free_scriptnames();
759 
760     /* global variables */
761     vars_clear(&globvarht);
762 
763     /* functions */
764     free_all_functions();
765     hash_clear(&func_hashtab);
766 
767     /* unreferenced lists and dicts */
768     (void)garbage_collect();
769 }
770 #endif
771 
772 /*
773  * Return the name of the executed function.
774  */
775     char_u *
776 func_name(cookie)
777     void *cookie;
778 {
779     return ((funccall_T *)cookie)->func->uf_name;
780 }
781 
782 /*
783  * Return the address holding the next breakpoint line for a funccall cookie.
784  */
785     linenr_T *
786 func_breakpoint(cookie)
787     void *cookie;
788 {
789     return &((funccall_T *)cookie)->breakpoint;
790 }
791 
792 /*
793  * Return the address holding the debug tick for a funccall cookie.
794  */
795     int *
796 func_dbg_tick(cookie)
797     void *cookie;
798 {
799     return &((funccall_T *)cookie)->dbg_tick;
800 }
801 
802 /*
803  * Return the nesting level for a funccall cookie.
804  */
805     int
806 func_level(cookie)
807     void *cookie;
808 {
809     return ((funccall_T *)cookie)->level;
810 }
811 
812 /* pointer to funccal for currently active function */
813 funccall_T *current_funccal = NULL;
814 
815 /*
816  * Return TRUE when a function was ended by a ":return" command.
817  */
818     int
819 current_func_returned()
820 {
821     return current_funccal->returned;
822 }
823 
824 
825 /*
826  * Set an internal variable to a string value. Creates the variable if it does
827  * not already exist.
828  */
829     void
830 set_internal_string_var(name, value)
831     char_u	*name;
832     char_u	*value;
833 {
834     char_u	*val;
835     typval_T	*tvp;
836 
837     val = vim_strsave(value);
838     if (val != NULL)
839     {
840 	tvp = alloc_string_tv(val);
841 	if (tvp != NULL)
842 	{
843 	    set_var(name, tvp, FALSE);
844 	    free_tv(tvp);
845 	}
846     }
847 }
848 
849 static lval_T	*redir_lval = NULL;
850 static char_u	*redir_endp = NULL;
851 static char_u	*redir_varname = NULL;
852 
853 /*
854  * Start recording command output to a variable
855  * Returns OK if successfully completed the setup.  FAIL otherwise.
856  */
857     int
858 var_redir_start(name, append)
859     char_u	*name;
860     int		append;		/* append to an existing variable */
861 {
862     int		save_emsg;
863     int		err;
864     typval_T	tv;
865 
866     /* Make sure a valid variable name is specified */
867     if (!eval_isnamec1(*name))
868     {
869 	EMSG(_(e_invarg));
870 	return FAIL;
871     }
872 
873     redir_varname = vim_strsave(name);
874     if (redir_varname == NULL)
875 	return FAIL;
876 
877     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
878     if (redir_lval == NULL)
879     {
880 	var_redir_stop();
881 	return FAIL;
882     }
883 
884     /* Parse the variable name (can be a dict or list entry). */
885     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
886 							     FNE_CHECK_START);
887     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
888     {
889 	if (redir_endp != NULL && *redir_endp != NUL)
890 	    /* Trailing characters are present after the variable name */
891 	    EMSG(_(e_trailing));
892 	else
893 	    EMSG(_(e_invarg));
894 	var_redir_stop();
895 	return FAIL;
896     }
897 
898     /* check if we can write to the variable: set it to or append an empty
899      * string */
900     save_emsg = did_emsg;
901     did_emsg = FALSE;
902     tv.v_type = VAR_STRING;
903     tv.vval.v_string = (char_u *)"";
904     if (append)
905 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
906     else
907 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
908     err = did_emsg;
909     did_emsg += save_emsg;
910     if (err)
911     {
912 	var_redir_stop();
913 	return FAIL;
914     }
915     if (redir_lval->ll_newkey != NULL)
916     {
917 	/* Dictionary item was created, don't do it again. */
918 	vim_free(redir_lval->ll_newkey);
919 	redir_lval->ll_newkey = NULL;
920     }
921 
922     return OK;
923 }
924 
925 /*
926  * Append "value[len]" to the variable set by var_redir_start().
927  */
928     void
929 var_redir_str(value, len)
930     char_u	*value;
931     int		len;
932 {
933     char_u	*val;
934     typval_T	tv;
935     int		save_emsg;
936     int		err;
937 
938     if (redir_lval == NULL)
939 	return;
940 
941     if (len == -1)
942 	/* Append the entire string */
943 	val = vim_strsave(value);
944     else
945 	/* Append only the specified number of characters */
946 	val = vim_strnsave(value, len);
947     if (val == NULL)
948 	return;
949 
950     tv.v_type = VAR_STRING;
951     tv.vval.v_string = val;
952 
953     save_emsg = did_emsg;
954     did_emsg = FALSE;
955     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
956     err = did_emsg;
957     did_emsg += save_emsg;
958     if (err)
959 	var_redir_stop();
960 
961     vim_free(tv.vval.v_string);
962 }
963 
964 /*
965  * Stop redirecting command output to a variable.
966  */
967     void
968 var_redir_stop()
969 {
970     if (redir_lval != NULL)
971     {
972 	clear_lval(redir_lval);
973 	vim_free(redir_lval);
974 	redir_lval = NULL;
975     }
976     vim_free(redir_varname);
977     redir_varname = NULL;
978 }
979 
980 # if defined(FEAT_MBYTE) || defined(PROTO)
981     int
982 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
983     char_u	*enc_from;
984     char_u	*enc_to;
985     char_u	*fname_from;
986     char_u	*fname_to;
987 {
988     int		err = FALSE;
989 
990     set_vim_var_string(VV_CC_FROM, enc_from, -1);
991     set_vim_var_string(VV_CC_TO, enc_to, -1);
992     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
993     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
994     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
995 	err = TRUE;
996     set_vim_var_string(VV_CC_FROM, NULL, -1);
997     set_vim_var_string(VV_CC_TO, NULL, -1);
998     set_vim_var_string(VV_FNAME_IN, NULL, -1);
999     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1000 
1001     if (err)
1002 	return FAIL;
1003     return OK;
1004 }
1005 # endif
1006 
1007 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1008     int
1009 eval_printexpr(fname, args)
1010     char_u	*fname;
1011     char_u	*args;
1012 {
1013     int		err = FALSE;
1014 
1015     set_vim_var_string(VV_FNAME_IN, fname, -1);
1016     set_vim_var_string(VV_CMDARG, args, -1);
1017     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1018 	err = TRUE;
1019     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1020     set_vim_var_string(VV_CMDARG, NULL, -1);
1021 
1022     if (err)
1023     {
1024 	mch_remove(fname);
1025 	return FAIL;
1026     }
1027     return OK;
1028 }
1029 # endif
1030 
1031 # if defined(FEAT_DIFF) || defined(PROTO)
1032     void
1033 eval_diff(origfile, newfile, outfile)
1034     char_u	*origfile;
1035     char_u	*newfile;
1036     char_u	*outfile;
1037 {
1038     int		err = FALSE;
1039 
1040     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1041     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1042     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1043     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1044     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1045     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1046     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1047 }
1048 
1049     void
1050 eval_patch(origfile, difffile, outfile)
1051     char_u	*origfile;
1052     char_u	*difffile;
1053     char_u	*outfile;
1054 {
1055     int		err;
1056 
1057     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1058     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1059     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1060     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1061     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1062     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1063     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1064 }
1065 # endif
1066 
1067 /*
1068  * Top level evaluation function, returning a boolean.
1069  * Sets "error" to TRUE if there was an error.
1070  * Return TRUE or FALSE.
1071  */
1072     int
1073 eval_to_bool(arg, error, nextcmd, skip)
1074     char_u	*arg;
1075     int		*error;
1076     char_u	**nextcmd;
1077     int		skip;	    /* only parse, don't execute */
1078 {
1079     typval_T	tv;
1080     int		retval = FALSE;
1081 
1082     if (skip)
1083 	++emsg_skip;
1084     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1085 	*error = TRUE;
1086     else
1087     {
1088 	*error = FALSE;
1089 	if (!skip)
1090 	{
1091 	    retval = (get_tv_number_chk(&tv, error) != 0);
1092 	    clear_tv(&tv);
1093 	}
1094     }
1095     if (skip)
1096 	--emsg_skip;
1097 
1098     return retval;
1099 }
1100 
1101 /*
1102  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1103  * only parsing to "nextcmd" is done, without reporting errors.  Return
1104  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1105  */
1106     char_u *
1107 eval_to_string_skip(arg, nextcmd, skip)
1108     char_u	*arg;
1109     char_u	**nextcmd;
1110     int		skip;	    /* only parse, don't execute */
1111 {
1112     typval_T	tv;
1113     char_u	*retval;
1114 
1115     if (skip)
1116 	++emsg_skip;
1117     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1118 	retval = NULL;
1119     else
1120     {
1121 	retval = vim_strsave(get_tv_string(&tv));
1122 	clear_tv(&tv);
1123     }
1124     if (skip)
1125 	--emsg_skip;
1126 
1127     return retval;
1128 }
1129 
1130 /*
1131  * Skip over an expression at "*pp".
1132  * Return FAIL for an error, OK otherwise.
1133  */
1134     int
1135 skip_expr(pp)
1136     char_u	**pp;
1137 {
1138     typval_T	rettv;
1139 
1140     *pp = skipwhite(*pp);
1141     return eval1(pp, &rettv, FALSE);
1142 }
1143 
1144 /*
1145  * Top level evaluation function, returning a string.
1146  * Return pointer to allocated memory, or NULL for failure.
1147  */
1148     char_u *
1149 eval_to_string(arg, nextcmd)
1150     char_u	*arg;
1151     char_u	**nextcmd;
1152 {
1153     typval_T	tv;
1154     char_u	*retval;
1155 
1156     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1157 	retval = NULL;
1158     else
1159     {
1160 	retval = vim_strsave(get_tv_string(&tv));
1161 	clear_tv(&tv);
1162     }
1163 
1164     return retval;
1165 }
1166 
1167 /*
1168  * Call eval_to_string() with "sandbox" set and not using local variables.
1169  */
1170     char_u *
1171 eval_to_string_safe(arg, nextcmd)
1172     char_u	*arg;
1173     char_u	**nextcmd;
1174 {
1175     char_u	*retval;
1176     void	*save_funccalp;
1177 
1178     save_funccalp = save_funccal();
1179     ++sandbox;
1180     retval = eval_to_string(arg, nextcmd);
1181     --sandbox;
1182     restore_funccal(save_funccalp);
1183     return retval;
1184 }
1185 
1186 /*
1187  * Top level evaluation function, returning a number.
1188  * Evaluates "expr" silently.
1189  * Returns -1 for an error.
1190  */
1191     int
1192 eval_to_number(expr)
1193     char_u	*expr;
1194 {
1195     typval_T	rettv;
1196     int		retval;
1197     char_u	*p = skipwhite(expr);
1198 
1199     ++emsg_off;
1200 
1201     if (eval1(&p, &rettv, TRUE) == FAIL)
1202 	retval = -1;
1203     else
1204     {
1205 	retval = get_tv_number_chk(&rettv, NULL);
1206 	clear_tv(&rettv);
1207     }
1208     --emsg_off;
1209 
1210     return retval;
1211 }
1212 
1213 /*
1214  * Prepare v: variable "idx" to be used.
1215  * Save the current typeval in "save_tv".
1216  * When not used yet add the variable to the v: hashtable.
1217  */
1218     static void
1219 prepare_vimvar(idx, save_tv)
1220     int		idx;
1221     typval_T	*save_tv;
1222 {
1223     *save_tv = vimvars[idx].vv_tv;
1224     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1225 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1226 }
1227 
1228 /*
1229  * Restore v: variable "idx" to typeval "save_tv".
1230  * When no longer defined, remove the variable from the v: hashtable.
1231  */
1232     static void
1233 restore_vimvar(idx, save_tv)
1234     int		idx;
1235     typval_T	*save_tv;
1236 {
1237     hashitem_T	*hi;
1238 
1239     clear_tv(&vimvars[idx].vv_tv);
1240     vimvars[idx].vv_tv = *save_tv;
1241     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1242     {
1243 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1244 	if (HASHITEM_EMPTY(hi))
1245 	    EMSG2(_(e_intern2), "restore_vimvar()");
1246 	else
1247 	    hash_remove(&vimvarht, hi);
1248     }
1249 }
1250 
1251 #if defined(FEAT_SYN_HL) || defined(PROTO)
1252 /*
1253  * Evaluate an expression to a list with suggestions.
1254  * For the "expr:" part of 'spellsuggest'.
1255  */
1256     list_T *
1257 eval_spell_expr(badword, expr)
1258     char_u	*badword;
1259     char_u	*expr;
1260 {
1261     typval_T	save_val;
1262     typval_T	rettv;
1263     list_T	*list = NULL;
1264     char_u	*p = skipwhite(expr);
1265 
1266     /* Set "v:val" to the bad word. */
1267     prepare_vimvar(VV_VAL, &save_val);
1268     vimvars[VV_VAL].vv_type = VAR_STRING;
1269     vimvars[VV_VAL].vv_str = badword;
1270     if (p_verbose == 0)
1271 	++emsg_off;
1272 
1273     if (eval1(&p, &rettv, TRUE) == OK)
1274     {
1275 	if (rettv.v_type != VAR_LIST)
1276 	    clear_tv(&rettv);
1277 	else
1278 	    list = rettv.vval.v_list;
1279     }
1280 
1281     if (p_verbose == 0)
1282 	--emsg_off;
1283     vimvars[VV_VAL].vv_str = NULL;
1284     restore_vimvar(VV_VAL, &save_val);
1285 
1286     return list;
1287 }
1288 
1289 /*
1290  * "list" is supposed to contain two items: a word and a number.  Return the
1291  * word in "pp" and the number as the return value.
1292  * Return -1 if anything isn't right.
1293  * Used to get the good word and score from the eval_spell_expr() result.
1294  */
1295     int
1296 get_spellword(list, pp)
1297     list_T	*list;
1298     char_u	**pp;
1299 {
1300     listitem_T	*li;
1301 
1302     li = list->lv_first;
1303     if (li == NULL)
1304 	return -1;
1305     *pp = get_tv_string(&li->li_tv);
1306 
1307     li = li->li_next;
1308     if (li == NULL)
1309 	return -1;
1310     return get_tv_number(&li->li_tv);
1311 }
1312 #endif
1313 
1314 /*
1315  * Top level evaluation function,
1316  */
1317     typval_T *
1318 eval_expr(arg, nextcmd)
1319     char_u	*arg;
1320     char_u	**nextcmd;
1321 {
1322     typval_T	*tv;
1323 
1324     tv = (typval_T *)alloc(sizeof(typval_T));
1325     if (!tv)
1326 	return NULL;
1327 
1328     if (eval0(arg, tv, nextcmd, TRUE) == FAIL)
1329     {
1330 	vim_free(tv);
1331 	return NULL;
1332     }
1333 
1334     return tv;
1335 }
1336 
1337 
1338 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1339 /*
1340  * Call some vimL function and return the result in "*rettv".
1341  * Uses argv[argc] for the function arguments.
1342  * Returns OK or FAIL.
1343  */
1344     static int
1345 call_vim_function(func, argc, argv, safe, rettv)
1346     char_u      *func;
1347     int		argc;
1348     char_u      **argv;
1349     int		safe;		/* use the sandbox */
1350     typval_T	*rettv;
1351 {
1352     typval_T	*argvars;
1353     long	n;
1354     int		len;
1355     int		i;
1356     int		doesrange;
1357     void	*save_funccalp = NULL;
1358     int		ret;
1359 
1360     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1361     if (argvars == NULL)
1362 	return FAIL;
1363 
1364     for (i = 0; i < argc; i++)
1365     {
1366 	/* Pass a NULL or empty argument as an empty string */
1367 	if (argv[i] == NULL || *argv[i] == NUL)
1368 	{
1369 	    argvars[i].v_type = VAR_STRING;
1370 	    argvars[i].vval.v_string = (char_u *)"";
1371 	    continue;
1372 	}
1373 
1374 	/* Recognize a number argument, the others must be strings. */
1375 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1376 	if (len != 0 && len == (int)STRLEN(argv[i]))
1377 	{
1378 	    argvars[i].v_type = VAR_NUMBER;
1379 	    argvars[i].vval.v_number = n;
1380 	}
1381 	else
1382 	{
1383 	    argvars[i].v_type = VAR_STRING;
1384 	    argvars[i].vval.v_string = argv[i];
1385 	}
1386     }
1387 
1388     if (safe)
1389     {
1390 	save_funccalp = save_funccal();
1391 	++sandbox;
1392     }
1393 
1394     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1395     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1396 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1397 		    &doesrange, TRUE, NULL);
1398     if (safe)
1399     {
1400 	--sandbox;
1401 	restore_funccal(save_funccalp);
1402     }
1403     vim_free(argvars);
1404 
1405     if (ret == FAIL)
1406 	clear_tv(rettv);
1407 
1408     return ret;
1409 }
1410 
1411 /*
1412  * Call vimL function "func" and return the result as a string.
1413  * Returns NULL when calling the function fails.
1414  * Uses argv[argc] for the function arguments.
1415  */
1416     void *
1417 call_func_retstr(func, argc, argv, safe)
1418     char_u      *func;
1419     int		argc;
1420     char_u      **argv;
1421     int		safe;		/* use the sandbox */
1422 {
1423     typval_T	rettv;
1424     char_u	*retval;
1425 
1426     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1427 	return NULL;
1428 
1429     retval = vim_strsave(get_tv_string(&rettv));
1430     clear_tv(&rettv);
1431     return retval;
1432 }
1433 
1434 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1435 /*
1436  * Call vimL function "func" and return the result as a number.
1437  * Returns -1 when calling the function fails.
1438  * Uses argv[argc] for the function arguments.
1439  */
1440     long
1441 call_func_retnr(func, argc, argv, safe)
1442     char_u      *func;
1443     int		argc;
1444     char_u      **argv;
1445     int		safe;		/* use the sandbox */
1446 {
1447     typval_T	rettv;
1448     long	retval;
1449 
1450     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1451 	return -1;
1452 
1453     retval = get_tv_number_chk(&rettv, NULL);
1454     clear_tv(&rettv);
1455     return retval;
1456 }
1457 #endif
1458 
1459 /*
1460  * Call vimL function "func" and return the result as a list
1461  * Uses argv[argc] for the function arguments.
1462  */
1463     void *
1464 call_func_retlist(func, argc, argv, safe)
1465     char_u      *func;
1466     int		argc;
1467     char_u      **argv;
1468     int		safe;		/* use the sandbox */
1469 {
1470     typval_T	rettv;
1471 
1472     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1473 	return NULL;
1474 
1475     if (rettv.v_type != VAR_LIST)
1476     {
1477 	clear_tv(&rettv);
1478 	return NULL;
1479     }
1480 
1481     return rettv.vval.v_list;
1482 }
1483 
1484 #endif
1485 
1486 /*
1487  * Save the current function call pointer, and set it to NULL.
1488  * Used when executing autocommands and for ":source".
1489  */
1490     void *
1491 save_funccal()
1492 {
1493     funccall_T *fc = current_funccal;
1494 
1495     current_funccal = NULL;
1496     return (void *)fc;
1497 }
1498 
1499     void
1500 restore_funccal(vfc)
1501     void *vfc;
1502 {
1503     funccall_T *fc = (funccall_T *)vfc;
1504 
1505     current_funccal = fc;
1506 }
1507 
1508 #if defined(FEAT_PROFILE) || defined(PROTO)
1509 /*
1510  * Prepare profiling for entering a child or something else that is not
1511  * counted for the script/function itself.
1512  * Should always be called in pair with prof_child_exit().
1513  */
1514     void
1515 prof_child_enter(tm)
1516     proftime_T *tm;	/* place to store waittime */
1517 {
1518     funccall_T *fc = current_funccal;
1519 
1520     if (fc != NULL && fc->func->uf_profiling)
1521 	profile_start(&fc->prof_child);
1522     script_prof_save(tm);
1523 }
1524 
1525 /*
1526  * Take care of time spent in a child.
1527  * Should always be called after prof_child_enter().
1528  */
1529     void
1530 prof_child_exit(tm)
1531     proftime_T *tm;	/* where waittime was stored */
1532 {
1533     funccall_T *fc = current_funccal;
1534 
1535     if (fc != NULL && fc->func->uf_profiling)
1536     {
1537 	profile_end(&fc->prof_child);
1538 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1539 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1540 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1541     }
1542     script_prof_restore(tm);
1543 }
1544 #endif
1545 
1546 
1547 #ifdef FEAT_FOLDING
1548 /*
1549  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1550  * it in "*cp".  Doesn't give error messages.
1551  */
1552     int
1553 eval_foldexpr(arg, cp)
1554     char_u	*arg;
1555     int		*cp;
1556 {
1557     typval_T	tv;
1558     int		retval;
1559     char_u	*s;
1560 
1561     ++emsg_off;
1562     ++sandbox;
1563     *cp = NUL;
1564     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1565 	retval = 0;
1566     else
1567     {
1568 	/* If the result is a number, just return the number. */
1569 	if (tv.v_type == VAR_NUMBER)
1570 	    retval = tv.vval.v_number;
1571 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1572 	    retval = 0;
1573 	else
1574 	{
1575 	    /* If the result is a string, check if there is a non-digit before
1576 	     * the number. */
1577 	    s = tv.vval.v_string;
1578 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1579 		*cp = *s++;
1580 	    retval = atol((char *)s);
1581 	}
1582 	clear_tv(&tv);
1583     }
1584     --emsg_off;
1585     --sandbox;
1586 
1587     return retval;
1588 }
1589 #endif
1590 
1591 /*
1592  * ":let"			list all variable values
1593  * ":let var1 var2"		list variable values
1594  * ":let var = expr"		assignment command.
1595  * ":let var += expr"		assignment command.
1596  * ":let var -= expr"		assignment command.
1597  * ":let var .= expr"		assignment command.
1598  * ":let [var1, var2] = expr"	unpack list.
1599  */
1600     void
1601 ex_let(eap)
1602     exarg_T	*eap;
1603 {
1604     char_u	*arg = eap->arg;
1605     char_u	*expr = NULL;
1606     typval_T	rettv;
1607     int		i;
1608     int		var_count = 0;
1609     int		semicolon = 0;
1610     char_u	op[2];
1611 
1612     expr = skip_var_list(arg, &var_count, &semicolon);
1613     if (expr == NULL)
1614 	return;
1615     expr = vim_strchr(expr, '=');
1616     if (expr == NULL)
1617     {
1618 	/*
1619 	 * ":let" without "=": list variables
1620 	 */
1621 	if (*arg == '[')
1622 	    EMSG(_(e_invarg));
1623 	else if (!ends_excmd(*arg))
1624 	    /* ":let var1 var2" */
1625 	    arg = list_arg_vars(eap, arg);
1626 	else if (!eap->skip)
1627 	{
1628 	    /* ":let" */
1629 	    list_glob_vars();
1630 	    list_buf_vars();
1631 	    list_win_vars();
1632 	    list_vim_vars();
1633 	}
1634 	eap->nextcmd = check_nextcmd(arg);
1635     }
1636     else
1637     {
1638 	op[0] = '=';
1639 	op[1] = NUL;
1640 	if (expr > arg)
1641 	{
1642 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1643 		op[0] = expr[-1];   /* +=, -= or .= */
1644 	}
1645 	expr = skipwhite(expr + 1);
1646 
1647 	if (eap->skip)
1648 	    ++emsg_skip;
1649 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1650 	if (eap->skip)
1651 	{
1652 	    if (i != FAIL)
1653 		clear_tv(&rettv);
1654 	    --emsg_skip;
1655 	}
1656 	else if (i != FAIL)
1657 	{
1658 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1659 									  op);
1660 	    clear_tv(&rettv);
1661 	}
1662     }
1663 }
1664 
1665 /*
1666  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1667  * Handles both "var" with any type and "[var, var; var]" with a list type.
1668  * When "nextchars" is not NULL it points to a string with characters that
1669  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1670  * or concatenate.
1671  * Returns OK or FAIL;
1672  */
1673     static int
1674 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1675     char_u	*arg_start;
1676     typval_T	*tv;
1677     int		copy;		/* copy values from "tv", don't move */
1678     int		semicolon;	/* from skip_var_list() */
1679     int		var_count;	/* from skip_var_list() */
1680     char_u	*nextchars;
1681 {
1682     char_u	*arg = arg_start;
1683     list_T	*l;
1684     int		i;
1685     listitem_T	*item;
1686     typval_T	ltv;
1687 
1688     if (*arg != '[')
1689     {
1690 	/*
1691 	 * ":let var = expr" or ":for var in list"
1692 	 */
1693 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1694 	    return FAIL;
1695 	return OK;
1696     }
1697 
1698     /*
1699      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1700      */
1701     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1702     {
1703 	EMSG(_(e_listreq));
1704 	return FAIL;
1705     }
1706 
1707     i = list_len(l);
1708     if (semicolon == 0 && var_count < i)
1709     {
1710 	EMSG(_("E687: Less targets than List items"));
1711 	return FAIL;
1712     }
1713     if (var_count - semicolon > i)
1714     {
1715 	EMSG(_("E688: More targets than List items"));
1716 	return FAIL;
1717     }
1718 
1719     item = l->lv_first;
1720     while (*arg != ']')
1721     {
1722 	arg = skipwhite(arg + 1);
1723 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1724 	item = item->li_next;
1725 	if (arg == NULL)
1726 	    return FAIL;
1727 
1728 	arg = skipwhite(arg);
1729 	if (*arg == ';')
1730 	{
1731 	    /* Put the rest of the list (may be empty) in the var after ';'.
1732 	     * Create a new list for this. */
1733 	    l = list_alloc();
1734 	    if (l == NULL)
1735 		return FAIL;
1736 	    while (item != NULL)
1737 	    {
1738 		list_append_tv(l, &item->li_tv);
1739 		item = item->li_next;
1740 	    }
1741 
1742 	    ltv.v_type = VAR_LIST;
1743 	    ltv.v_lock = 0;
1744 	    ltv.vval.v_list = l;
1745 	    l->lv_refcount = 1;
1746 
1747 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1748 						    (char_u *)"]", nextchars);
1749 	    clear_tv(&ltv);
1750 	    if (arg == NULL)
1751 		return FAIL;
1752 	    break;
1753 	}
1754 	else if (*arg != ',' && *arg != ']')
1755 	{
1756 	    EMSG2(_(e_intern2), "ex_let_vars()");
1757 	    return FAIL;
1758 	}
1759     }
1760 
1761     return OK;
1762 }
1763 
1764 /*
1765  * Skip over assignable variable "var" or list of variables "[var, var]".
1766  * Used for ":let varvar = expr" and ":for varvar in expr".
1767  * For "[var, var]" increment "*var_count" for each variable.
1768  * for "[var, var; var]" set "semicolon".
1769  * Return NULL for an error.
1770  */
1771     static char_u *
1772 skip_var_list(arg, var_count, semicolon)
1773     char_u	*arg;
1774     int		*var_count;
1775     int		*semicolon;
1776 {
1777     char_u	*p, *s;
1778 
1779     if (*arg == '[')
1780     {
1781 	/* "[var, var]": find the matching ']'. */
1782 	p = arg;
1783 	for (;;)
1784 	{
1785 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1786 	    s = skip_var_one(p);
1787 	    if (s == p)
1788 	    {
1789 		EMSG2(_(e_invarg2), p);
1790 		return NULL;
1791 	    }
1792 	    ++*var_count;
1793 
1794 	    p = skipwhite(s);
1795 	    if (*p == ']')
1796 		break;
1797 	    else if (*p == ';')
1798 	    {
1799 		if (*semicolon == 1)
1800 		{
1801 		    EMSG(_("Double ; in list of variables"));
1802 		    return NULL;
1803 		}
1804 		*semicolon = 1;
1805 	    }
1806 	    else if (*p != ',')
1807 	    {
1808 		EMSG2(_(e_invarg2), p);
1809 		return NULL;
1810 	    }
1811 	}
1812 	return p + 1;
1813     }
1814     else
1815 	return skip_var_one(arg);
1816 }
1817 
1818 /*
1819  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1820  * l[idx].
1821  */
1822     static char_u *
1823 skip_var_one(arg)
1824     char_u	*arg;
1825 {
1826     if (*arg == '@' && arg[1] != NUL)
1827 	return arg + 2;
1828     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1829 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1830 }
1831 
1832 /*
1833  * List variables for hashtab "ht" with prefix "prefix".
1834  * If "empty" is TRUE also list NULL strings as empty strings.
1835  */
1836     static void
1837 list_hashtable_vars(ht, prefix, empty)
1838     hashtab_T	*ht;
1839     char_u	*prefix;
1840     int		empty;
1841 {
1842     hashitem_T	*hi;
1843     dictitem_T	*di;
1844     int		todo;
1845 
1846     todo = ht->ht_used;
1847     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1848     {
1849 	if (!HASHITEM_EMPTY(hi))
1850 	{
1851 	    --todo;
1852 	    di = HI2DI(hi);
1853 	    if (empty || di->di_tv.v_type != VAR_STRING
1854 					   || di->di_tv.vval.v_string != NULL)
1855 		list_one_var(di, prefix);
1856 	}
1857     }
1858 }
1859 
1860 /*
1861  * List global variables.
1862  */
1863     static void
1864 list_glob_vars()
1865 {
1866     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1867 }
1868 
1869 /*
1870  * List buffer variables.
1871  */
1872     static void
1873 list_buf_vars()
1874 {
1875     char_u	numbuf[NUMBUFLEN];
1876 
1877     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1878 
1879     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1880     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1881 }
1882 
1883 /*
1884  * List window variables.
1885  */
1886     static void
1887 list_win_vars()
1888 {
1889     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1890 }
1891 
1892 /*
1893  * List Vim variables.
1894  */
1895     static void
1896 list_vim_vars()
1897 {
1898     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1899 }
1900 
1901 /*
1902  * List variables in "arg".
1903  */
1904     static char_u *
1905 list_arg_vars(eap, arg)
1906     exarg_T	*eap;
1907     char_u	*arg;
1908 {
1909     int		error = FALSE;
1910     int		len;
1911     char_u	*name;
1912     char_u	*name_start;
1913     char_u	*arg_subsc;
1914     char_u	*tofree;
1915     typval_T    tv;
1916 
1917     while (!ends_excmd(*arg) && !got_int)
1918     {
1919 	if (error || eap->skip)
1920 	{
1921 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1922 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1923 	    {
1924 		emsg_severe = TRUE;
1925 		EMSG(_(e_trailing));
1926 		break;
1927 	    }
1928 	}
1929 	else
1930 	{
1931 	    /* get_name_len() takes care of expanding curly braces */
1932 	    name_start = name = arg;
1933 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1934 	    if (len <= 0)
1935 	    {
1936 		/* This is mainly to keep test 49 working: when expanding
1937 		 * curly braces fails overrule the exception error message. */
1938 		if (len < 0 && !aborting())
1939 		{
1940 		    emsg_severe = TRUE;
1941 		    EMSG2(_(e_invarg2), arg);
1942 		    break;
1943 		}
1944 		error = TRUE;
1945 	    }
1946 	    else
1947 	    {
1948 		if (tofree != NULL)
1949 		    name = tofree;
1950 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1951 		    error = TRUE;
1952 		else
1953 		{
1954 		    /* handle d.key, l[idx], f(expr) */
1955 		    arg_subsc = arg;
1956 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
1957 			error = TRUE;
1958 		    else
1959 		    {
1960 			if (arg == arg_subsc && len == 2 && name[1] == ':')
1961 			{
1962 			    switch (*name)
1963 			    {
1964 				case 'g': list_glob_vars(); break;
1965 				case 'b': list_buf_vars(); break;
1966 				case 'w': list_win_vars(); break;
1967 				case 'v': list_vim_vars(); break;
1968 				default:
1969 					  EMSG2(_("E738: Can't list variables for %s"), name);
1970 			    }
1971 			}
1972 			else
1973 			{
1974 			    char_u	numbuf[NUMBUFLEN];
1975 			    char_u	*tf;
1976 			    int		c;
1977 			    char_u	*s;
1978 
1979 			    s = echo_string(&tv, &tf, numbuf);
1980 			    c = *arg;
1981 			    *arg = NUL;
1982 			    list_one_var_a((char_u *)"",
1983 				    arg == arg_subsc ? name : name_start,
1984 				    tv.v_type, s == NULL ? (char_u *)"" : s);
1985 			    *arg = c;
1986 			    vim_free(tf);
1987 			}
1988 			clear_tv(&tv);
1989 		    }
1990 		}
1991 	    }
1992 
1993 	    vim_free(tofree);
1994 	}
1995 
1996 	arg = skipwhite(arg);
1997     }
1998 
1999     return arg;
2000 }
2001 
2002 /*
2003  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2004  * Returns a pointer to the char just after the var name.
2005  * Returns NULL if there is an error.
2006  */
2007     static char_u *
2008 ex_let_one(arg, tv, copy, endchars, op)
2009     char_u	*arg;		/* points to variable name */
2010     typval_T	*tv;		/* value to assign to variable */
2011     int		copy;		/* copy value from "tv" */
2012     char_u	*endchars;	/* valid chars after variable name  or NULL */
2013     char_u	*op;		/* "+", "-", "."  or NULL*/
2014 {
2015     int		c1;
2016     char_u	*name;
2017     char_u	*p;
2018     char_u	*arg_end = NULL;
2019     int		len;
2020     int		opt_flags;
2021     char_u	*tofree = NULL;
2022 
2023     /*
2024      * ":let $VAR = expr": Set environment variable.
2025      */
2026     if (*arg == '$')
2027     {
2028 	/* Find the end of the name. */
2029 	++arg;
2030 	name = arg;
2031 	len = get_env_len(&arg);
2032 	if (len == 0)
2033 	    EMSG2(_(e_invarg2), name - 1);
2034 	else
2035 	{
2036 	    if (op != NULL && (*op == '+' || *op == '-'))
2037 		EMSG2(_(e_letwrong), op);
2038 	    else if (endchars != NULL
2039 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2040 		EMSG(_(e_letunexp));
2041 	    else
2042 	    {
2043 		c1 = name[len];
2044 		name[len] = NUL;
2045 		p = get_tv_string_chk(tv);
2046 		if (p != NULL && op != NULL && *op == '.')
2047 		{
2048 		    int	    mustfree = FALSE;
2049 		    char_u  *s = vim_getenv(name, &mustfree);
2050 
2051 		    if (s != NULL)
2052 		    {
2053 			p = tofree = concat_str(s, p);
2054 			if (mustfree)
2055 			    vim_free(s);
2056 		    }
2057 		}
2058 		if (p != NULL)
2059 		{
2060 		    vim_setenv(name, p);
2061 		    if (STRICMP(name, "HOME") == 0)
2062 			init_homedir();
2063 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2064 			didset_vim = FALSE;
2065 		    else if (didset_vimruntime
2066 					&& STRICMP(name, "VIMRUNTIME") == 0)
2067 			didset_vimruntime = FALSE;
2068 		    arg_end = arg;
2069 		}
2070 		name[len] = c1;
2071 		vim_free(tofree);
2072 	    }
2073 	}
2074     }
2075 
2076     /*
2077      * ":let &option = expr": Set option value.
2078      * ":let &l:option = expr": Set local option value.
2079      * ":let &g:option = expr": Set global option value.
2080      */
2081     else if (*arg == '&')
2082     {
2083 	/* Find the end of the name. */
2084 	p = find_option_end(&arg, &opt_flags);
2085 	if (p == NULL || (endchars != NULL
2086 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2087 	    EMSG(_(e_letunexp));
2088 	else
2089 	{
2090 	    long	n;
2091 	    int		opt_type;
2092 	    long	numval;
2093 	    char_u	*stringval = NULL;
2094 	    char_u	*s;
2095 
2096 	    c1 = *p;
2097 	    *p = NUL;
2098 
2099 	    n = get_tv_number(tv);
2100 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2101 	    if (s != NULL && op != NULL && *op != '=')
2102 	    {
2103 		opt_type = get_option_value(arg, &numval,
2104 						       &stringval, opt_flags);
2105 		if ((opt_type == 1 && *op == '.')
2106 			|| (opt_type == 0 && *op != '.'))
2107 		    EMSG2(_(e_letwrong), op);
2108 		else
2109 		{
2110 		    if (opt_type == 1)  /* number */
2111 		    {
2112 			if (*op == '+')
2113 			    n = numval + n;
2114 			else
2115 			    n = numval - n;
2116 		    }
2117 		    else if (opt_type == 0 && stringval != NULL) /* string */
2118 		    {
2119 			s = concat_str(stringval, s);
2120 			vim_free(stringval);
2121 			stringval = s;
2122 		    }
2123 		}
2124 	    }
2125 	    if (s != NULL)
2126 	    {
2127 		set_option_value(arg, n, s, opt_flags);
2128 		arg_end = p;
2129 	    }
2130 	    *p = c1;
2131 	    vim_free(stringval);
2132 	}
2133     }
2134 
2135     /*
2136      * ":let @r = expr": Set register contents.
2137      */
2138     else if (*arg == '@')
2139     {
2140 	++arg;
2141 	if (op != NULL && (*op == '+' || *op == '-'))
2142 	    EMSG2(_(e_letwrong), op);
2143 	else if (endchars != NULL
2144 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2145 	    EMSG(_(e_letunexp));
2146 	else
2147 	{
2148 	    char_u	*tofree = NULL;
2149 	    char_u	*s;
2150 
2151 	    p = get_tv_string_chk(tv);
2152 	    if (p != NULL && op != NULL && *op == '.')
2153 	    {
2154 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2155 		if (s != NULL)
2156 		{
2157 		    p = tofree = concat_str(s, p);
2158 		    vim_free(s);
2159 		}
2160 	    }
2161 	    if (p != NULL)
2162 	    {
2163 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2164 		arg_end = arg + 1;
2165 	    }
2166 	    vim_free(tofree);
2167 	}
2168     }
2169 
2170     /*
2171      * ":let var = expr": Set internal variable.
2172      * ":let {expr} = expr": Idem, name made with curly braces
2173      */
2174     else if (eval_isnamec1(*arg) || *arg == '{')
2175     {
2176 	lval_T	lv;
2177 
2178 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2179 	if (p != NULL && lv.ll_name != NULL)
2180 	{
2181 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2182 		EMSG(_(e_letunexp));
2183 	    else
2184 	    {
2185 		set_var_lval(&lv, p, tv, copy, op);
2186 		arg_end = p;
2187 	    }
2188 	}
2189 	clear_lval(&lv);
2190     }
2191 
2192     else
2193 	EMSG2(_(e_invarg2), arg);
2194 
2195     return arg_end;
2196 }
2197 
2198 /*
2199  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2200  */
2201     static int
2202 check_changedtick(arg)
2203     char_u	*arg;
2204 {
2205     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2206     {
2207 	EMSG2(_(e_readonlyvar), arg);
2208 	return TRUE;
2209     }
2210     return FALSE;
2211 }
2212 
2213 /*
2214  * Get an lval: variable, Dict item or List item that can be assigned a value
2215  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2216  * "name.key", "name.key[expr]" etc.
2217  * Indexing only works if "name" is an existing List or Dictionary.
2218  * "name" points to the start of the name.
2219  * If "rettv" is not NULL it points to the value to be assigned.
2220  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2221  * wrong; must end in space or cmd separator.
2222  *
2223  * Returns a pointer to just after the name, including indexes.
2224  * When an evaluation error occurs "lp->ll_name" is NULL;
2225  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2226  */
2227     static char_u *
2228 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2229     char_u	*name;
2230     typval_T	*rettv;
2231     lval_T	*lp;
2232     int		unlet;
2233     int		skip;
2234     int		quiet;	    /* don't give error messages */
2235     int		fne_flags;  /* flags for find_name_end() */
2236 {
2237     char_u	*p;
2238     char_u	*expr_start, *expr_end;
2239     int		cc;
2240     dictitem_T	*v;
2241     typval_T	var1;
2242     typval_T	var2;
2243     int		empty1 = FALSE;
2244     listitem_T	*ni;
2245     char_u	*key = NULL;
2246     int		len;
2247     hashtab_T	*ht;
2248 
2249     /* Clear everything in "lp". */
2250     vim_memset(lp, 0, sizeof(lval_T));
2251 
2252     if (skip)
2253     {
2254 	/* When skipping just find the end of the name. */
2255 	lp->ll_name = name;
2256 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2257     }
2258 
2259     /* Find the end of the name. */
2260     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2261     if (expr_start != NULL)
2262     {
2263 	/* Don't expand the name when we already know there is an error. */
2264 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2265 						    && *p != '[' && *p != '.')
2266 	{
2267 	    EMSG(_(e_trailing));
2268 	    return NULL;
2269 	}
2270 
2271 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2272 	if (lp->ll_exp_name == NULL)
2273 	{
2274 	    /* Report an invalid expression in braces, unless the
2275 	     * expression evaluation has been cancelled due to an
2276 	     * aborting error, an interrupt, or an exception. */
2277 	    if (!aborting() && !quiet)
2278 	    {
2279 		emsg_severe = TRUE;
2280 		EMSG2(_(e_invarg2), name);
2281 		return NULL;
2282 	    }
2283 	}
2284 	lp->ll_name = lp->ll_exp_name;
2285     }
2286     else
2287 	lp->ll_name = name;
2288 
2289     /* Without [idx] or .key we are done. */
2290     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2291 	return p;
2292 
2293     cc = *p;
2294     *p = NUL;
2295     v = find_var(lp->ll_name, &ht);
2296     if (v == NULL && !quiet)
2297 	EMSG2(_(e_undefvar), lp->ll_name);
2298     *p = cc;
2299     if (v == NULL)
2300 	return NULL;
2301 
2302     /*
2303      * Loop until no more [idx] or .key is following.
2304      */
2305     lp->ll_tv = &v->di_tv;
2306     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2307     {
2308 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2309 		&& !(lp->ll_tv->v_type == VAR_DICT
2310 					   && lp->ll_tv->vval.v_dict != NULL))
2311 	{
2312 	    if (!quiet)
2313 		EMSG(_("E689: Can only index a List or Dictionary"));
2314 	    return NULL;
2315 	}
2316 	if (lp->ll_range)
2317 	{
2318 	    if (!quiet)
2319 		EMSG(_("E708: [:] must come last"));
2320 	    return NULL;
2321 	}
2322 
2323 	len = -1;
2324 	if (*p == '.')
2325 	{
2326 	    key = p + 1;
2327 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2328 		;
2329 	    if (len == 0)
2330 	    {
2331 		if (!quiet)
2332 		    EMSG(_(e_emptykey));
2333 		return NULL;
2334 	    }
2335 	    p = key + len;
2336 	}
2337 	else
2338 	{
2339 	    /* Get the index [expr] or the first index [expr: ]. */
2340 	    p = skipwhite(p + 1);
2341 	    if (*p == ':')
2342 		empty1 = TRUE;
2343 	    else
2344 	    {
2345 		empty1 = FALSE;
2346 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2347 		    return NULL;
2348 		if (get_tv_string_chk(&var1) == NULL)
2349 		{
2350 		    /* not a number or string */
2351 		    clear_tv(&var1);
2352 		    return NULL;
2353 		}
2354 	    }
2355 
2356 	    /* Optionally get the second index [ :expr]. */
2357 	    if (*p == ':')
2358 	    {
2359 		if (lp->ll_tv->v_type == VAR_DICT)
2360 		{
2361 		    if (!quiet)
2362 			EMSG(_(e_dictrange));
2363 		    if (!empty1)
2364 			clear_tv(&var1);
2365 		    return NULL;
2366 		}
2367 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2368 					       || rettv->vval.v_list == NULL))
2369 		{
2370 		    if (!quiet)
2371 			EMSG(_("E709: [:] requires a List value"));
2372 		    if (!empty1)
2373 			clear_tv(&var1);
2374 		    return NULL;
2375 		}
2376 		p = skipwhite(p + 1);
2377 		if (*p == ']')
2378 		    lp->ll_empty2 = TRUE;
2379 		else
2380 		{
2381 		    lp->ll_empty2 = FALSE;
2382 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2383 		    {
2384 			if (!empty1)
2385 			    clear_tv(&var1);
2386 			return NULL;
2387 		    }
2388 		    if (get_tv_string_chk(&var2) == NULL)
2389 		    {
2390 			/* not a number or string */
2391 			if (!empty1)
2392 			    clear_tv(&var1);
2393 			clear_tv(&var2);
2394 			return NULL;
2395 		    }
2396 		}
2397 		lp->ll_range = TRUE;
2398 	    }
2399 	    else
2400 		lp->ll_range = FALSE;
2401 
2402 	    if (*p != ']')
2403 	    {
2404 		if (!quiet)
2405 		    EMSG(_(e_missbrac));
2406 		if (!empty1)
2407 		    clear_tv(&var1);
2408 		if (lp->ll_range && !lp->ll_empty2)
2409 		    clear_tv(&var2);
2410 		return NULL;
2411 	    }
2412 
2413 	    /* Skip to past ']'. */
2414 	    ++p;
2415 	}
2416 
2417 	if (lp->ll_tv->v_type == VAR_DICT)
2418 	{
2419 	    if (len == -1)
2420 	    {
2421 		/* "[key]": get key from "var1" */
2422 		key = get_tv_string(&var1);	/* is number or string */
2423 		if (*key == NUL)
2424 		{
2425 		    if (!quiet)
2426 			EMSG(_(e_emptykey));
2427 		    clear_tv(&var1);
2428 		    return NULL;
2429 		}
2430 	    }
2431 	    lp->ll_list = NULL;
2432 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2433 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2434 	    if (lp->ll_di == NULL)
2435 	    {
2436 		/* Key does not exist in dict: may need to add it. */
2437 		if (*p == '[' || *p == '.' || unlet)
2438 		{
2439 		    if (!quiet)
2440 			EMSG2(_(e_dictkey), key);
2441 		    if (len == -1)
2442 			clear_tv(&var1);
2443 		    return NULL;
2444 		}
2445 		if (len == -1)
2446 		    lp->ll_newkey = vim_strsave(key);
2447 		else
2448 		    lp->ll_newkey = vim_strnsave(key, len);
2449 		if (len == -1)
2450 		    clear_tv(&var1);
2451 		if (lp->ll_newkey == NULL)
2452 		    p = NULL;
2453 		break;
2454 	    }
2455 	    if (len == -1)
2456 		clear_tv(&var1);
2457 	    lp->ll_tv = &lp->ll_di->di_tv;
2458 	}
2459 	else
2460 	{
2461 	    /*
2462 	     * Get the number and item for the only or first index of the List.
2463 	     */
2464 	    if (empty1)
2465 		lp->ll_n1 = 0;
2466 	    else
2467 	    {
2468 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2469 		clear_tv(&var1);
2470 	    }
2471 	    lp->ll_dict = NULL;
2472 	    lp->ll_list = lp->ll_tv->vval.v_list;
2473 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2474 	    if (lp->ll_li == NULL)
2475 	    {
2476 		if (!quiet)
2477 		    EMSGN(_(e_listidx), lp->ll_n1);
2478 		if (lp->ll_range && !lp->ll_empty2)
2479 		    clear_tv(&var2);
2480 		return NULL;
2481 	    }
2482 
2483 	    /*
2484 	     * May need to find the item or absolute index for the second
2485 	     * index of a range.
2486 	     * When no index given: "lp->ll_empty2" is TRUE.
2487 	     * Otherwise "lp->ll_n2" is set to the second index.
2488 	     */
2489 	    if (lp->ll_range && !lp->ll_empty2)
2490 	    {
2491 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2492 		clear_tv(&var2);
2493 		if (lp->ll_n2 < 0)
2494 		{
2495 		    ni = list_find(lp->ll_list, lp->ll_n2);
2496 		    if (ni == NULL)
2497 		    {
2498 			if (!quiet)
2499 			    EMSGN(_(e_listidx), lp->ll_n2);
2500 			return NULL;
2501 		    }
2502 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2503 		}
2504 
2505 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2506 		if (lp->ll_n1 < 0)
2507 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2508 		if (lp->ll_n2 < lp->ll_n1)
2509 		{
2510 		    if (!quiet)
2511 			EMSGN(_(e_listidx), lp->ll_n2);
2512 		    return NULL;
2513 		}
2514 	    }
2515 
2516 	    lp->ll_tv = &lp->ll_li->li_tv;
2517 	}
2518     }
2519 
2520     return p;
2521 }
2522 
2523 /*
2524  * Clear lval "lp" that was filled by get_lval().
2525  */
2526     static void
2527 clear_lval(lp)
2528     lval_T	*lp;
2529 {
2530     vim_free(lp->ll_exp_name);
2531     vim_free(lp->ll_newkey);
2532 }
2533 
2534 /*
2535  * Set a variable that was parsed by get_lval() to "rettv".
2536  * "endp" points to just after the parsed name.
2537  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2538  */
2539     static void
2540 set_var_lval(lp, endp, rettv, copy, op)
2541     lval_T	*lp;
2542     char_u	*endp;
2543     typval_T	*rettv;
2544     int		copy;
2545     char_u	*op;
2546 {
2547     int		cc;
2548     listitem_T	*ni;
2549     listitem_T	*ri;
2550     dictitem_T	*di;
2551 
2552     if (lp->ll_tv == NULL)
2553     {
2554 	if (!check_changedtick(lp->ll_name))
2555 	{
2556 	    cc = *endp;
2557 	    *endp = NUL;
2558 	    if (op != NULL && *op != '=')
2559 	    {
2560 		typval_T tv;
2561 
2562 		/* handle +=, -= and .= */
2563 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2564 							     &tv, TRUE) == OK)
2565 		{
2566 		    if (tv_op(&tv, rettv, op) == OK)
2567 			set_var(lp->ll_name, &tv, FALSE);
2568 		    clear_tv(&tv);
2569 		}
2570 	    }
2571 	    else
2572 		set_var(lp->ll_name, rettv, copy);
2573 	    *endp = cc;
2574 	}
2575     }
2576     else if (tv_check_lock(lp->ll_newkey == NULL
2577 		? lp->ll_tv->v_lock
2578 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2579 	;
2580     else if (lp->ll_range)
2581     {
2582 	/*
2583 	 * Assign the List values to the list items.
2584 	 */
2585 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2586 	{
2587 	    if (op != NULL && *op != '=')
2588 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2589 	    else
2590 	    {
2591 		clear_tv(&lp->ll_li->li_tv);
2592 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2593 	    }
2594 	    ri = ri->li_next;
2595 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2596 		break;
2597 	    if (lp->ll_li->li_next == NULL)
2598 	    {
2599 		/* Need to add an empty item. */
2600 		ni = listitem_alloc();
2601 		if (ni == NULL)
2602 		{
2603 		    ri = NULL;
2604 		    break;
2605 		}
2606 		ni->li_tv.v_type = VAR_NUMBER;
2607 		ni->li_tv.v_lock = 0;
2608 		ni->li_tv.vval.v_number = 0;
2609 		list_append(lp->ll_list, ni);
2610 	    }
2611 	    lp->ll_li = lp->ll_li->li_next;
2612 	    ++lp->ll_n1;
2613 	}
2614 	if (ri != NULL)
2615 	    EMSG(_("E710: List value has more items than target"));
2616 	else if (lp->ll_empty2
2617 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2618 		: lp->ll_n1 != lp->ll_n2)
2619 	    EMSG(_("E711: List value has not enough items"));
2620     }
2621     else
2622     {
2623 	/*
2624 	 * Assign to a List or Dictionary item.
2625 	 */
2626 	if (lp->ll_newkey != NULL)
2627 	{
2628 	    if (op != NULL && *op != '=')
2629 	    {
2630 		EMSG2(_(e_letwrong), op);
2631 		return;
2632 	    }
2633 
2634 	    /* Need to add an item to the Dictionary. */
2635 	    di = dictitem_alloc(lp->ll_newkey);
2636 	    if (di == NULL)
2637 		return;
2638 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2639 	    {
2640 		vim_free(di);
2641 		return;
2642 	    }
2643 	    lp->ll_tv = &di->di_tv;
2644 	}
2645 	else if (op != NULL && *op != '=')
2646 	{
2647 	    tv_op(lp->ll_tv, rettv, op);
2648 	    return;
2649 	}
2650 	else
2651 	    clear_tv(lp->ll_tv);
2652 
2653 	/*
2654 	 * Assign the value to the variable or list item.
2655 	 */
2656 	if (copy)
2657 	    copy_tv(rettv, lp->ll_tv);
2658 	else
2659 	{
2660 	    *lp->ll_tv = *rettv;
2661 	    lp->ll_tv->v_lock = 0;
2662 	    init_tv(rettv);
2663 	}
2664     }
2665 }
2666 
2667 /*
2668  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2669  * Returns OK or FAIL.
2670  */
2671     static int
2672 tv_op(tv1, tv2, op)
2673     typval_T *tv1;
2674     typval_T *tv2;
2675     char_u  *op;
2676 {
2677     long	n;
2678     char_u	numbuf[NUMBUFLEN];
2679     char_u	*s;
2680 
2681     /* Can't do anything with a Funcref or a Dict on the right. */
2682     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2683     {
2684 	switch (tv1->v_type)
2685 	{
2686 	    case VAR_DICT:
2687 	    case VAR_FUNC:
2688 		break;
2689 
2690 	    case VAR_LIST:
2691 		if (*op != '+' || tv2->v_type != VAR_LIST)
2692 		    break;
2693 		/* List += List */
2694 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2695 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2696 		return OK;
2697 
2698 	    case VAR_NUMBER:
2699 	    case VAR_STRING:
2700 		if (tv2->v_type == VAR_LIST)
2701 		    break;
2702 		if (*op == '+' || *op == '-')
2703 		{
2704 		    /* nr += nr  or  nr -= nr*/
2705 		    n = get_tv_number(tv1);
2706 		    if (*op == '+')
2707 			n += get_tv_number(tv2);
2708 		    else
2709 			n -= get_tv_number(tv2);
2710 		    clear_tv(tv1);
2711 		    tv1->v_type = VAR_NUMBER;
2712 		    tv1->vval.v_number = n;
2713 		}
2714 		else
2715 		{
2716 		    /* str .= str */
2717 		    s = get_tv_string(tv1);
2718 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2719 		    clear_tv(tv1);
2720 		    tv1->v_type = VAR_STRING;
2721 		    tv1->vval.v_string = s;
2722 		}
2723 		return OK;
2724 	}
2725     }
2726 
2727     EMSG2(_(e_letwrong), op);
2728     return FAIL;
2729 }
2730 
2731 /*
2732  * Add a watcher to a list.
2733  */
2734     static void
2735 list_add_watch(l, lw)
2736     list_T	*l;
2737     listwatch_T	*lw;
2738 {
2739     lw->lw_next = l->lv_watch;
2740     l->lv_watch = lw;
2741 }
2742 
2743 /*
2744  * Remove a watcher from a list.
2745  * No warning when it isn't found...
2746  */
2747     static void
2748 list_rem_watch(l, lwrem)
2749     list_T	*l;
2750     listwatch_T	*lwrem;
2751 {
2752     listwatch_T	*lw, **lwp;
2753 
2754     lwp = &l->lv_watch;
2755     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2756     {
2757 	if (lw == lwrem)
2758 	{
2759 	    *lwp = lw->lw_next;
2760 	    break;
2761 	}
2762 	lwp = &lw->lw_next;
2763     }
2764 }
2765 
2766 /*
2767  * Just before removing an item from a list: advance watchers to the next
2768  * item.
2769  */
2770     static void
2771 list_fix_watch(l, item)
2772     list_T	*l;
2773     listitem_T	*item;
2774 {
2775     listwatch_T	*lw;
2776 
2777     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2778 	if (lw->lw_item == item)
2779 	    lw->lw_item = item->li_next;
2780 }
2781 
2782 /*
2783  * Evaluate the expression used in a ":for var in expr" command.
2784  * "arg" points to "var".
2785  * Set "*errp" to TRUE for an error, FALSE otherwise;
2786  * Return a pointer that holds the info.  Null when there is an error.
2787  */
2788     void *
2789 eval_for_line(arg, errp, nextcmdp, skip)
2790     char_u	*arg;
2791     int		*errp;
2792     char_u	**nextcmdp;
2793     int		skip;
2794 {
2795     forinfo_T	*fi;
2796     char_u	*expr;
2797     typval_T	tv;
2798     list_T	*l;
2799 
2800     *errp = TRUE;	/* default: there is an error */
2801 
2802     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2803     if (fi == NULL)
2804 	return NULL;
2805 
2806     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2807     if (expr == NULL)
2808 	return fi;
2809 
2810     expr = skipwhite(expr);
2811     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2812     {
2813 	EMSG(_("E690: Missing \"in\" after :for"));
2814 	return fi;
2815     }
2816 
2817     if (skip)
2818 	++emsg_skip;
2819     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2820     {
2821 	*errp = FALSE;
2822 	if (!skip)
2823 	{
2824 	    l = tv.vval.v_list;
2825 	    if (tv.v_type != VAR_LIST || l == NULL)
2826 	    {
2827 		EMSG(_(e_listreq));
2828 		clear_tv(&tv);
2829 	    }
2830 	    else
2831 	    {
2832 		fi->fi_list = l;
2833 		list_add_watch(l, &fi->fi_lw);
2834 		fi->fi_lw.lw_item = l->lv_first;
2835 	    }
2836 	}
2837     }
2838     if (skip)
2839 	--emsg_skip;
2840 
2841     return fi;
2842 }
2843 
2844 /*
2845  * Use the first item in a ":for" list.  Advance to the next.
2846  * Assign the values to the variable (list).  "arg" points to the first one.
2847  * Return TRUE when a valid item was found, FALSE when at end of list or
2848  * something wrong.
2849  */
2850     int
2851 next_for_item(fi_void, arg)
2852     void	*fi_void;
2853     char_u	*arg;
2854 {
2855     forinfo_T    *fi = (forinfo_T *)fi_void;
2856     int		result;
2857     listitem_T	*item;
2858 
2859     item = fi->fi_lw.lw_item;
2860     if (item == NULL)
2861 	result = FALSE;
2862     else
2863     {
2864 	fi->fi_lw.lw_item = item->li_next;
2865 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2866 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2867     }
2868     return result;
2869 }
2870 
2871 /*
2872  * Free the structure used to store info used by ":for".
2873  */
2874     void
2875 free_for_info(fi_void)
2876     void *fi_void;
2877 {
2878     forinfo_T    *fi = (forinfo_T *)fi_void;
2879 
2880     if (fi != NULL && fi->fi_list != NULL)
2881     {
2882 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2883 	list_unref(fi->fi_list);
2884     }
2885     vim_free(fi);
2886 }
2887 
2888 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2889 
2890     void
2891 set_context_for_expression(xp, arg, cmdidx)
2892     expand_T	*xp;
2893     char_u	*arg;
2894     cmdidx_T	cmdidx;
2895 {
2896     int		got_eq = FALSE;
2897     int		c;
2898     char_u	*p;
2899 
2900     if (cmdidx == CMD_let)
2901     {
2902 	xp->xp_context = EXPAND_USER_VARS;
2903 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2904 	{
2905 	    /* ":let var1 var2 ...": find last space. */
2906 	    for (p = arg + STRLEN(arg); p >= arg; )
2907 	    {
2908 		xp->xp_pattern = p;
2909 		mb_ptr_back(arg, p);
2910 		if (vim_iswhite(*p))
2911 		    break;
2912 	    }
2913 	    return;
2914 	}
2915     }
2916     else
2917 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2918 							  : EXPAND_EXPRESSION;
2919     while ((xp->xp_pattern = vim_strpbrk(arg,
2920 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2921     {
2922 	c = *xp->xp_pattern;
2923 	if (c == '&')
2924 	{
2925 	    c = xp->xp_pattern[1];
2926 	    if (c == '&')
2927 	    {
2928 		++xp->xp_pattern;
2929 		xp->xp_context = cmdidx != CMD_let || got_eq
2930 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2931 	    }
2932 	    else if (c != ' ')
2933 	    {
2934 		xp->xp_context = EXPAND_SETTINGS;
2935 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2936 		    xp->xp_pattern += 2;
2937 
2938 	    }
2939 	}
2940 	else if (c == '$')
2941 	{
2942 	    /* environment variable */
2943 	    xp->xp_context = EXPAND_ENV_VARS;
2944 	}
2945 	else if (c == '=')
2946 	{
2947 	    got_eq = TRUE;
2948 	    xp->xp_context = EXPAND_EXPRESSION;
2949 	}
2950 	else if (c == '<'
2951 		&& xp->xp_context == EXPAND_FUNCTIONS
2952 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2953 	{
2954 	    /* Function name can start with "<SNR>" */
2955 	    break;
2956 	}
2957 	else if (cmdidx != CMD_let || got_eq)
2958 	{
2959 	    if (c == '"')	    /* string */
2960 	    {
2961 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
2962 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
2963 			++xp->xp_pattern;
2964 		xp->xp_context = EXPAND_NOTHING;
2965 	    }
2966 	    else if (c == '\'')	    /* literal string */
2967 	    {
2968 		/* Trick: '' is like stopping and starting a literal string. */
2969 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
2970 		    /* skip */ ;
2971 		xp->xp_context = EXPAND_NOTHING;
2972 	    }
2973 	    else if (c == '|')
2974 	    {
2975 		if (xp->xp_pattern[1] == '|')
2976 		{
2977 		    ++xp->xp_pattern;
2978 		    xp->xp_context = EXPAND_EXPRESSION;
2979 		}
2980 		else
2981 		    xp->xp_context = EXPAND_COMMANDS;
2982 	    }
2983 	    else
2984 		xp->xp_context = EXPAND_EXPRESSION;
2985 	}
2986 	else
2987 	    /* Doesn't look like something valid, expand as an expression
2988 	     * anyway. */
2989 	    xp->xp_context = EXPAND_EXPRESSION;
2990 	arg = xp->xp_pattern;
2991 	if (*arg != NUL)
2992 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
2993 		/* skip */ ;
2994     }
2995     xp->xp_pattern = arg;
2996 }
2997 
2998 #endif /* FEAT_CMDL_COMPL */
2999 
3000 /*
3001  * ":1,25call func(arg1, arg2)"	function call.
3002  */
3003     void
3004 ex_call(eap)
3005     exarg_T	*eap;
3006 {
3007     char_u	*arg = eap->arg;
3008     char_u	*startarg;
3009     char_u	*name;
3010     char_u	*tofree;
3011     int		len;
3012     typval_T	rettv;
3013     linenr_T	lnum;
3014     int		doesrange;
3015     int		failed = FALSE;
3016     funcdict_T	fudi;
3017 
3018     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3019     vim_free(fudi.fd_newkey);
3020     if (tofree == NULL)
3021 	return;
3022 
3023     /* Increase refcount on dictionary, it could get deleted when evaluating
3024      * the arguments. */
3025     if (fudi.fd_dict != NULL)
3026 	++fudi.fd_dict->dv_refcount;
3027 
3028     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3029     len = STRLEN(tofree);
3030     name = deref_func_name(tofree, &len);
3031 
3032     /* Skip white space to allow ":call func ()".  Not good, but required for
3033      * backward compatibility. */
3034     startarg = skipwhite(arg);
3035     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3036 
3037     if (*startarg != '(')
3038     {
3039 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3040 	goto end;
3041     }
3042 
3043     /*
3044      * When skipping, evaluate the function once, to find the end of the
3045      * arguments.
3046      * When the function takes a range, this is discovered after the first
3047      * call, and the loop is broken.
3048      */
3049     if (eap->skip)
3050     {
3051 	++emsg_skip;
3052 	lnum = eap->line2;	/* do it once, also with an invalid range */
3053     }
3054     else
3055 	lnum = eap->line1;
3056     for ( ; lnum <= eap->line2; ++lnum)
3057     {
3058 	if (!eap->skip && eap->addr_count > 0)
3059 	{
3060 	    curwin->w_cursor.lnum = lnum;
3061 	    curwin->w_cursor.col = 0;
3062 	}
3063 	arg = startarg;
3064 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3065 		    eap->line1, eap->line2, &doesrange,
3066 					    !eap->skip, fudi.fd_dict) == FAIL)
3067 	{
3068 	    failed = TRUE;
3069 	    break;
3070 	}
3071 	clear_tv(&rettv);
3072 	if (doesrange || eap->skip)
3073 	    break;
3074 	/* Stop when immediately aborting on error, or when an interrupt
3075 	 * occurred or an exception was thrown but not caught.
3076 	 * get_func_tv() returned OK, so that the check for trailing
3077 	 * characters below is executed. */
3078 	if (aborting())
3079 	    break;
3080     }
3081     if (eap->skip)
3082 	--emsg_skip;
3083 
3084     if (!failed)
3085     {
3086 	/* Check for trailing illegal characters and a following command. */
3087 	if (!ends_excmd(*arg))
3088 	{
3089 	    emsg_severe = TRUE;
3090 	    EMSG(_(e_trailing));
3091 	}
3092 	else
3093 	    eap->nextcmd = check_nextcmd(arg);
3094     }
3095 
3096 end:
3097     dict_unref(fudi.fd_dict);
3098     vim_free(tofree);
3099 }
3100 
3101 /*
3102  * ":unlet[!] var1 ... " command.
3103  */
3104     void
3105 ex_unlet(eap)
3106     exarg_T	*eap;
3107 {
3108     ex_unletlock(eap, eap->arg, 0);
3109 }
3110 
3111 /*
3112  * ":lockvar" and ":unlockvar" commands
3113  */
3114     void
3115 ex_lockvar(eap)
3116     exarg_T	*eap;
3117 {
3118     char_u	*arg = eap->arg;
3119     int		deep = 2;
3120 
3121     if (eap->forceit)
3122 	deep = -1;
3123     else if (vim_isdigit(*arg))
3124     {
3125 	deep = getdigits(&arg);
3126 	arg = skipwhite(arg);
3127     }
3128 
3129     ex_unletlock(eap, arg, deep);
3130 }
3131 
3132 /*
3133  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3134  */
3135     static void
3136 ex_unletlock(eap, argstart, deep)
3137     exarg_T	*eap;
3138     char_u	*argstart;
3139     int		deep;
3140 {
3141     char_u	*arg = argstart;
3142     char_u	*name_end;
3143     int		error = FALSE;
3144     lval_T	lv;
3145 
3146     do
3147     {
3148 	/* Parse the name and find the end. */
3149 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3150 							     FNE_CHECK_START);
3151 	if (lv.ll_name == NULL)
3152 	    error = TRUE;	    /* error but continue parsing */
3153 	if (name_end == NULL || (!vim_iswhite(*name_end)
3154 						   && !ends_excmd(*name_end)))
3155 	{
3156 	    if (name_end != NULL)
3157 	    {
3158 		emsg_severe = TRUE;
3159 		EMSG(_(e_trailing));
3160 	    }
3161 	    if (!(eap->skip || error))
3162 		clear_lval(&lv);
3163 	    break;
3164 	}
3165 
3166 	if (!error && !eap->skip)
3167 	{
3168 	    if (eap->cmdidx == CMD_unlet)
3169 	    {
3170 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3171 		    error = TRUE;
3172 	    }
3173 	    else
3174 	    {
3175 		if (do_lock_var(&lv, name_end, deep,
3176 					  eap->cmdidx == CMD_lockvar) == FAIL)
3177 		    error = TRUE;
3178 	    }
3179 	}
3180 
3181 	if (!eap->skip)
3182 	    clear_lval(&lv);
3183 
3184 	arg = skipwhite(name_end);
3185     } while (!ends_excmd(*arg));
3186 
3187     eap->nextcmd = check_nextcmd(arg);
3188 }
3189 
3190     static int
3191 do_unlet_var(lp, name_end, forceit)
3192     lval_T	*lp;
3193     char_u	*name_end;
3194     int		forceit;
3195 {
3196     int		ret = OK;
3197     int		cc;
3198 
3199     if (lp->ll_tv == NULL)
3200     {
3201 	cc = *name_end;
3202 	*name_end = NUL;
3203 
3204 	/* Normal name or expanded name. */
3205 	if (check_changedtick(lp->ll_name))
3206 	    ret = FAIL;
3207 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3208 	    ret = FAIL;
3209 	*name_end = cc;
3210     }
3211     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3212 	return FAIL;
3213     else if (lp->ll_range)
3214     {
3215 	listitem_T    *li;
3216 
3217 	/* Delete a range of List items. */
3218 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3219 	{
3220 	    li = lp->ll_li->li_next;
3221 	    listitem_remove(lp->ll_list, lp->ll_li);
3222 	    lp->ll_li = li;
3223 	    ++lp->ll_n1;
3224 	}
3225     }
3226     else
3227     {
3228 	if (lp->ll_list != NULL)
3229 	    /* unlet a List item. */
3230 	    listitem_remove(lp->ll_list, lp->ll_li);
3231 	else
3232 	    /* unlet a Dictionary item. */
3233 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3234     }
3235 
3236     return ret;
3237 }
3238 
3239 /*
3240  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3241  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3242  */
3243     int
3244 do_unlet(name, forceit)
3245     char_u	*name;
3246     int		forceit;
3247 {
3248     hashtab_T	*ht;
3249     hashitem_T	*hi;
3250     char_u	*varname;
3251 
3252     ht = find_var_ht(name, &varname);
3253     if (ht != NULL && *varname != NUL)
3254     {
3255 	hi = hash_find(ht, varname);
3256 	if (!HASHITEM_EMPTY(hi))
3257 	{
3258 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3259 		return FAIL;
3260 	    delete_var(ht, hi);
3261 	    return OK;
3262 	}
3263     }
3264     if (forceit)
3265 	return OK;
3266     EMSG2(_("E108: No such variable: \"%s\""), name);
3267     return FAIL;
3268 }
3269 
3270 /*
3271  * Lock or unlock variable indicated by "lp".
3272  * "deep" is the levels to go (-1 for unlimited);
3273  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3274  */
3275     static int
3276 do_lock_var(lp, name_end, deep, lock)
3277     lval_T	*lp;
3278     char_u	*name_end;
3279     int		deep;
3280     int		lock;
3281 {
3282     int		ret = OK;
3283     int		cc;
3284     dictitem_T	*di;
3285 
3286     if (deep == 0)	/* nothing to do */
3287 	return OK;
3288 
3289     if (lp->ll_tv == NULL)
3290     {
3291 	cc = *name_end;
3292 	*name_end = NUL;
3293 
3294 	/* Normal name or expanded name. */
3295 	if (check_changedtick(lp->ll_name))
3296 	    ret = FAIL;
3297 	else
3298 	{
3299 	    di = find_var(lp->ll_name, NULL);
3300 	    if (di == NULL)
3301 		ret = FAIL;
3302 	    else
3303 	    {
3304 		if (lock)
3305 		    di->di_flags |= DI_FLAGS_LOCK;
3306 		else
3307 		    di->di_flags &= ~DI_FLAGS_LOCK;
3308 		item_lock(&di->di_tv, deep, lock);
3309 	    }
3310 	}
3311 	*name_end = cc;
3312     }
3313     else if (lp->ll_range)
3314     {
3315 	listitem_T    *li = lp->ll_li;
3316 
3317 	/* (un)lock a range of List items. */
3318 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3319 	{
3320 	    item_lock(&li->li_tv, deep, lock);
3321 	    li = li->li_next;
3322 	    ++lp->ll_n1;
3323 	}
3324     }
3325     else if (lp->ll_list != NULL)
3326 	/* (un)lock a List item. */
3327 	item_lock(&lp->ll_li->li_tv, deep, lock);
3328     else
3329 	/* un(lock) a Dictionary item. */
3330 	item_lock(&lp->ll_di->di_tv, deep, lock);
3331 
3332     return ret;
3333 }
3334 
3335 /*
3336  * Lock or unlock an item.  "deep" is nr of levels to go.
3337  */
3338     static void
3339 item_lock(tv, deep, lock)
3340     typval_T	*tv;
3341     int		deep;
3342     int		lock;
3343 {
3344     static int	recurse = 0;
3345     list_T	*l;
3346     listitem_T	*li;
3347     dict_T	*d;
3348     hashitem_T	*hi;
3349     int		todo;
3350 
3351     if (recurse >= DICT_MAXNEST)
3352     {
3353 	EMSG(_("E743: variable nested too deep for (un)lock"));
3354 	return;
3355     }
3356     if (deep == 0)
3357 	return;
3358     ++recurse;
3359 
3360     /* lock/unlock the item itself */
3361     if (lock)
3362 	tv->v_lock |= VAR_LOCKED;
3363     else
3364 	tv->v_lock &= ~VAR_LOCKED;
3365 
3366     switch (tv->v_type)
3367     {
3368 	case VAR_LIST:
3369 	    if ((l = tv->vval.v_list) != NULL)
3370 	    {
3371 		if (lock)
3372 		    l->lv_lock |= VAR_LOCKED;
3373 		else
3374 		    l->lv_lock &= ~VAR_LOCKED;
3375 		if (deep < 0 || deep > 1)
3376 		    /* recursive: lock/unlock the items the List contains */
3377 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3378 			item_lock(&li->li_tv, deep - 1, lock);
3379 	    }
3380 	    break;
3381 	case VAR_DICT:
3382 	    if ((d = tv->vval.v_dict) != NULL)
3383 	    {
3384 		if (lock)
3385 		    d->dv_lock |= VAR_LOCKED;
3386 		else
3387 		    d->dv_lock &= ~VAR_LOCKED;
3388 		if (deep < 0 || deep > 1)
3389 		{
3390 		    /* recursive: lock/unlock the items the List contains */
3391 		    todo = d->dv_hashtab.ht_used;
3392 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3393 		    {
3394 			if (!HASHITEM_EMPTY(hi))
3395 			{
3396 			    --todo;
3397 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3398 			}
3399 		    }
3400 		}
3401 	    }
3402     }
3403     --recurse;
3404 }
3405 
3406 /*
3407  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3408  * it refers to a List or Dictionary that is locked.
3409  */
3410     static int
3411 tv_islocked(tv)
3412     typval_T	*tv;
3413 {
3414     return (tv->v_lock & VAR_LOCKED)
3415 	|| (tv->v_type == VAR_LIST
3416 		&& tv->vval.v_list != NULL
3417 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3418 	|| (tv->v_type == VAR_DICT
3419 		&& tv->vval.v_dict != NULL
3420 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3421 }
3422 
3423 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3424 /*
3425  * Delete all "menutrans_" variables.
3426  */
3427     void
3428 del_menutrans_vars()
3429 {
3430     hashitem_T	*hi;
3431     int		todo;
3432 
3433     hash_lock(&globvarht);
3434     todo = globvarht.ht_used;
3435     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3436     {
3437 	if (!HASHITEM_EMPTY(hi))
3438 	{
3439 	    --todo;
3440 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3441 		delete_var(&globvarht, hi);
3442 	}
3443     }
3444     hash_unlock(&globvarht);
3445 }
3446 #endif
3447 
3448 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3449 
3450 /*
3451  * Local string buffer for the next two functions to store a variable name
3452  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3453  * get_user_var_name().
3454  */
3455 
3456 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3457 
3458 static char_u	*varnamebuf = NULL;
3459 static int	varnamebuflen = 0;
3460 
3461 /*
3462  * Function to concatenate a prefix and a variable name.
3463  */
3464     static char_u *
3465 cat_prefix_varname(prefix, name)
3466     int		prefix;
3467     char_u	*name;
3468 {
3469     int		len;
3470 
3471     len = (int)STRLEN(name) + 3;
3472     if (len > varnamebuflen)
3473     {
3474 	vim_free(varnamebuf);
3475 	len += 10;			/* some additional space */
3476 	varnamebuf = alloc(len);
3477 	if (varnamebuf == NULL)
3478 	{
3479 	    varnamebuflen = 0;
3480 	    return NULL;
3481 	}
3482 	varnamebuflen = len;
3483     }
3484     *varnamebuf = prefix;
3485     varnamebuf[1] = ':';
3486     STRCPY(varnamebuf + 2, name);
3487     return varnamebuf;
3488 }
3489 
3490 /*
3491  * Function given to ExpandGeneric() to obtain the list of user defined
3492  * (global/buffer/window/built-in) variable names.
3493  */
3494 /*ARGSUSED*/
3495     char_u *
3496 get_user_var_name(xp, idx)
3497     expand_T	*xp;
3498     int		idx;
3499 {
3500     static long_u	gdone;
3501     static long_u	bdone;
3502     static long_u	wdone;
3503     static int		vidx;
3504     static hashitem_T	*hi;
3505     hashtab_T		*ht;
3506 
3507     if (idx == 0)
3508 	gdone = bdone = wdone = vidx = 0;
3509 
3510     /* Global variables */
3511     if (gdone < globvarht.ht_used)
3512     {
3513 	if (gdone++ == 0)
3514 	    hi = globvarht.ht_array;
3515 	else
3516 	    ++hi;
3517 	while (HASHITEM_EMPTY(hi))
3518 	    ++hi;
3519 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3520 	    return cat_prefix_varname('g', hi->hi_key);
3521 	return hi->hi_key;
3522     }
3523 
3524     /* b: variables */
3525     ht = &curbuf->b_vars.dv_hashtab;
3526     if (bdone < ht->ht_used)
3527     {
3528 	if (bdone++ == 0)
3529 	    hi = ht->ht_array;
3530 	else
3531 	    ++hi;
3532 	while (HASHITEM_EMPTY(hi))
3533 	    ++hi;
3534 	return cat_prefix_varname('b', hi->hi_key);
3535     }
3536     if (bdone == ht->ht_used)
3537     {
3538 	++bdone;
3539 	return (char_u *)"b:changedtick";
3540     }
3541 
3542     /* w: variables */
3543     ht = &curwin->w_vars.dv_hashtab;
3544     if (wdone < ht->ht_used)
3545     {
3546 	if (wdone++ == 0)
3547 	    hi = ht->ht_array;
3548 	else
3549 	    ++hi;
3550 	while (HASHITEM_EMPTY(hi))
3551 	    ++hi;
3552 	return cat_prefix_varname('w', hi->hi_key);
3553     }
3554 
3555     /* v: variables */
3556     if (vidx < VV_LEN)
3557 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3558 
3559     vim_free(varnamebuf);
3560     varnamebuf = NULL;
3561     varnamebuflen = 0;
3562     return NULL;
3563 }
3564 
3565 #endif /* FEAT_CMDL_COMPL */
3566 
3567 /*
3568  * types for expressions.
3569  */
3570 typedef enum
3571 {
3572     TYPE_UNKNOWN = 0
3573     , TYPE_EQUAL	/* == */
3574     , TYPE_NEQUAL	/* != */
3575     , TYPE_GREATER	/* >  */
3576     , TYPE_GEQUAL	/* >= */
3577     , TYPE_SMALLER	/* <  */
3578     , TYPE_SEQUAL	/* <= */
3579     , TYPE_MATCH	/* =~ */
3580     , TYPE_NOMATCH	/* !~ */
3581 } exptype_T;
3582 
3583 /*
3584  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3585  * executed.  The function may return OK, but the rettv will be of type
3586  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3587  */
3588 
3589 /*
3590  * Handle zero level expression.
3591  * This calls eval1() and handles error message and nextcmd.
3592  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3593  * Return OK or FAIL.
3594  */
3595     static int
3596 eval0(arg, rettv, nextcmd, evaluate)
3597     char_u	*arg;
3598     typval_T	*rettv;
3599     char_u	**nextcmd;
3600     int		evaluate;
3601 {
3602     int		ret;
3603     char_u	*p;
3604 
3605     p = skipwhite(arg);
3606     ret = eval1(&p, rettv, evaluate);
3607     if (ret == FAIL || !ends_excmd(*p))
3608     {
3609 	if (ret != FAIL)
3610 	    clear_tv(rettv);
3611 	/*
3612 	 * Report the invalid expression unless the expression evaluation has
3613 	 * been cancelled due to an aborting error, an interrupt, or an
3614 	 * exception.
3615 	 */
3616 	if (!aborting())
3617 	    EMSG2(_(e_invexpr2), arg);
3618 	ret = FAIL;
3619     }
3620     if (nextcmd != NULL)
3621 	*nextcmd = check_nextcmd(p);
3622 
3623     return ret;
3624 }
3625 
3626 /*
3627  * Handle top level expression:
3628  *	expr1 ? expr0 : expr0
3629  *
3630  * "arg" must point to the first non-white of the expression.
3631  * "arg" is advanced to the next non-white after the recognized expression.
3632  *
3633  * Return OK or FAIL.
3634  */
3635     static int
3636 eval1(arg, rettv, evaluate)
3637     char_u	**arg;
3638     typval_T	*rettv;
3639     int		evaluate;
3640 {
3641     int		result;
3642     typval_T	var2;
3643 
3644     /*
3645      * Get the first variable.
3646      */
3647     if (eval2(arg, rettv, evaluate) == FAIL)
3648 	return FAIL;
3649 
3650     if ((*arg)[0] == '?')
3651     {
3652 	result = FALSE;
3653 	if (evaluate)
3654 	{
3655 	    int		error = FALSE;
3656 
3657 	    if (get_tv_number_chk(rettv, &error) != 0)
3658 		result = TRUE;
3659 	    clear_tv(rettv);
3660 	    if (error)
3661 		return FAIL;
3662 	}
3663 
3664 	/*
3665 	 * Get the second variable.
3666 	 */
3667 	*arg = skipwhite(*arg + 1);
3668 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3669 	    return FAIL;
3670 
3671 	/*
3672 	 * Check for the ":".
3673 	 */
3674 	if ((*arg)[0] != ':')
3675 	{
3676 	    EMSG(_("E109: Missing ':' after '?'"));
3677 	    if (evaluate && result)
3678 		clear_tv(rettv);
3679 	    return FAIL;
3680 	}
3681 
3682 	/*
3683 	 * Get the third variable.
3684 	 */
3685 	*arg = skipwhite(*arg + 1);
3686 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3687 	{
3688 	    if (evaluate && result)
3689 		clear_tv(rettv);
3690 	    return FAIL;
3691 	}
3692 	if (evaluate && !result)
3693 	    *rettv = var2;
3694     }
3695 
3696     return OK;
3697 }
3698 
3699 /*
3700  * Handle first level expression:
3701  *	expr2 || expr2 || expr2	    logical OR
3702  *
3703  * "arg" must point to the first non-white of the expression.
3704  * "arg" is advanced to the next non-white after the recognized expression.
3705  *
3706  * Return OK or FAIL.
3707  */
3708     static int
3709 eval2(arg, rettv, evaluate)
3710     char_u	**arg;
3711     typval_T	*rettv;
3712     int		evaluate;
3713 {
3714     typval_T	var2;
3715     long	result;
3716     int		first;
3717     int		error = FALSE;
3718 
3719     /*
3720      * Get the first variable.
3721      */
3722     if (eval3(arg, rettv, evaluate) == FAIL)
3723 	return FAIL;
3724 
3725     /*
3726      * Repeat until there is no following "||".
3727      */
3728     first = TRUE;
3729     result = FALSE;
3730     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3731     {
3732 	if (evaluate && first)
3733 	{
3734 	    if (get_tv_number_chk(rettv, &error) != 0)
3735 		result = TRUE;
3736 	    clear_tv(rettv);
3737 	    if (error)
3738 		return FAIL;
3739 	    first = FALSE;
3740 	}
3741 
3742 	/*
3743 	 * Get the second variable.
3744 	 */
3745 	*arg = skipwhite(*arg + 2);
3746 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3747 	    return FAIL;
3748 
3749 	/*
3750 	 * Compute the result.
3751 	 */
3752 	if (evaluate && !result)
3753 	{
3754 	    if (get_tv_number_chk(&var2, &error) != 0)
3755 		result = TRUE;
3756 	    clear_tv(&var2);
3757 	    if (error)
3758 		return FAIL;
3759 	}
3760 	if (evaluate)
3761 	{
3762 	    rettv->v_type = VAR_NUMBER;
3763 	    rettv->vval.v_number = result;
3764 	}
3765     }
3766 
3767     return OK;
3768 }
3769 
3770 /*
3771  * Handle second level expression:
3772  *	expr3 && expr3 && expr3	    logical AND
3773  *
3774  * "arg" must point to the first non-white of the expression.
3775  * "arg" is advanced to the next non-white after the recognized expression.
3776  *
3777  * Return OK or FAIL.
3778  */
3779     static int
3780 eval3(arg, rettv, evaluate)
3781     char_u	**arg;
3782     typval_T	*rettv;
3783     int		evaluate;
3784 {
3785     typval_T	var2;
3786     long	result;
3787     int		first;
3788     int		error = FALSE;
3789 
3790     /*
3791      * Get the first variable.
3792      */
3793     if (eval4(arg, rettv, evaluate) == FAIL)
3794 	return FAIL;
3795 
3796     /*
3797      * Repeat until there is no following "&&".
3798      */
3799     first = TRUE;
3800     result = TRUE;
3801     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3802     {
3803 	if (evaluate && first)
3804 	{
3805 	    if (get_tv_number_chk(rettv, &error) == 0)
3806 		result = FALSE;
3807 	    clear_tv(rettv);
3808 	    if (error)
3809 		return FAIL;
3810 	    first = FALSE;
3811 	}
3812 
3813 	/*
3814 	 * Get the second variable.
3815 	 */
3816 	*arg = skipwhite(*arg + 2);
3817 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3818 	    return FAIL;
3819 
3820 	/*
3821 	 * Compute the result.
3822 	 */
3823 	if (evaluate && result)
3824 	{
3825 	    if (get_tv_number_chk(&var2, &error) == 0)
3826 		result = FALSE;
3827 	    clear_tv(&var2);
3828 	    if (error)
3829 		return FAIL;
3830 	}
3831 	if (evaluate)
3832 	{
3833 	    rettv->v_type = VAR_NUMBER;
3834 	    rettv->vval.v_number = result;
3835 	}
3836     }
3837 
3838     return OK;
3839 }
3840 
3841 /*
3842  * Handle third level expression:
3843  *	var1 == var2
3844  *	var1 =~ var2
3845  *	var1 != var2
3846  *	var1 !~ var2
3847  *	var1 > var2
3848  *	var1 >= var2
3849  *	var1 < var2
3850  *	var1 <= var2
3851  *	var1 is var2
3852  *	var1 isnot var2
3853  *
3854  * "arg" must point to the first non-white of the expression.
3855  * "arg" is advanced to the next non-white after the recognized expression.
3856  *
3857  * Return OK or FAIL.
3858  */
3859     static int
3860 eval4(arg, rettv, evaluate)
3861     char_u	**arg;
3862     typval_T	*rettv;
3863     int		evaluate;
3864 {
3865     typval_T	var2;
3866     char_u	*p;
3867     int		i;
3868     exptype_T	type = TYPE_UNKNOWN;
3869     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3870     int		len = 2;
3871     long	n1, n2;
3872     char_u	*s1, *s2;
3873     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3874     regmatch_T	regmatch;
3875     int		ic;
3876     char_u	*save_cpo;
3877 
3878     /*
3879      * Get the first variable.
3880      */
3881     if (eval5(arg, rettv, evaluate) == FAIL)
3882 	return FAIL;
3883 
3884     p = *arg;
3885     switch (p[0])
3886     {
3887 	case '=':   if (p[1] == '=')
3888 			type = TYPE_EQUAL;
3889 		    else if (p[1] == '~')
3890 			type = TYPE_MATCH;
3891 		    break;
3892 	case '!':   if (p[1] == '=')
3893 			type = TYPE_NEQUAL;
3894 		    else if (p[1] == '~')
3895 			type = TYPE_NOMATCH;
3896 		    break;
3897 	case '>':   if (p[1] != '=')
3898 		    {
3899 			type = TYPE_GREATER;
3900 			len = 1;
3901 		    }
3902 		    else
3903 			type = TYPE_GEQUAL;
3904 		    break;
3905 	case '<':   if (p[1] != '=')
3906 		    {
3907 			type = TYPE_SMALLER;
3908 			len = 1;
3909 		    }
3910 		    else
3911 			type = TYPE_SEQUAL;
3912 		    break;
3913 	case 'i':   if (p[1] == 's')
3914 		    {
3915 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3916 			    len = 5;
3917 			if (!vim_isIDc(p[len]))
3918 			{
3919 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3920 			    type_is = TRUE;
3921 			}
3922 		    }
3923 		    break;
3924     }
3925 
3926     /*
3927      * If there is a comparitive operator, use it.
3928      */
3929     if (type != TYPE_UNKNOWN)
3930     {
3931 	/* extra question mark appended: ignore case */
3932 	if (p[len] == '?')
3933 	{
3934 	    ic = TRUE;
3935 	    ++len;
3936 	}
3937 	/* extra '#' appended: match case */
3938 	else if (p[len] == '#')
3939 	{
3940 	    ic = FALSE;
3941 	    ++len;
3942 	}
3943 	/* nothing appened: use 'ignorecase' */
3944 	else
3945 	    ic = p_ic;
3946 
3947 	/*
3948 	 * Get the second variable.
3949 	 */
3950 	*arg = skipwhite(p + len);
3951 	if (eval5(arg, &var2, evaluate) == FAIL)
3952 	{
3953 	    clear_tv(rettv);
3954 	    return FAIL;
3955 	}
3956 
3957 	if (evaluate)
3958 	{
3959 	    if (type_is && rettv->v_type != var2.v_type)
3960 	    {
3961 		/* For "is" a different type always means FALSE, for "notis"
3962 		 * it means TRUE. */
3963 		n1 = (type == TYPE_NEQUAL);
3964 	    }
3965 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
3966 	    {
3967 		if (type_is)
3968 		{
3969 		    n1 = (rettv->v_type == var2.v_type
3970 				   && rettv->vval.v_list == var2.vval.v_list);
3971 		    if (type == TYPE_NEQUAL)
3972 			n1 = !n1;
3973 		}
3974 		else if (rettv->v_type != var2.v_type
3975 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3976 		{
3977 		    if (rettv->v_type != var2.v_type)
3978 			EMSG(_("E691: Can only compare List with List"));
3979 		    else
3980 			EMSG(_("E692: Invalid operation for Lists"));
3981 		    clear_tv(rettv);
3982 		    clear_tv(&var2);
3983 		    return FAIL;
3984 		}
3985 		else
3986 		{
3987 		    /* Compare two Lists for being equal or unequal. */
3988 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
3989 		    if (type == TYPE_NEQUAL)
3990 			n1 = !n1;
3991 		}
3992 	    }
3993 
3994 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
3995 	    {
3996 		if (type_is)
3997 		{
3998 		    n1 = (rettv->v_type == var2.v_type
3999 				   && rettv->vval.v_dict == var2.vval.v_dict);
4000 		    if (type == TYPE_NEQUAL)
4001 			n1 = !n1;
4002 		}
4003 		else if (rettv->v_type != var2.v_type
4004 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4005 		{
4006 		    if (rettv->v_type != var2.v_type)
4007 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4008 		    else
4009 			EMSG(_("E736: Invalid operation for Dictionary"));
4010 		    clear_tv(rettv);
4011 		    clear_tv(&var2);
4012 		    return FAIL;
4013 		}
4014 		else
4015 		{
4016 		    /* Compare two Dictionaries for being equal or unequal. */
4017 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4018 		    if (type == TYPE_NEQUAL)
4019 			n1 = !n1;
4020 		}
4021 	    }
4022 
4023 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4024 	    {
4025 		if (rettv->v_type != var2.v_type
4026 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4027 		{
4028 		    if (rettv->v_type != var2.v_type)
4029 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4030 		    else
4031 			EMSG(_("E694: Invalid operation for Funcrefs"));
4032 		    clear_tv(rettv);
4033 		    clear_tv(&var2);
4034 		    return FAIL;
4035 		}
4036 		else
4037 		{
4038 		    /* Compare two Funcrefs for being equal or unequal. */
4039 		    if (rettv->vval.v_string == NULL
4040 						|| var2.vval.v_string == NULL)
4041 			n1 = FALSE;
4042 		    else
4043 			n1 = STRCMP(rettv->vval.v_string,
4044 						     var2.vval.v_string) == 0;
4045 		    if (type == TYPE_NEQUAL)
4046 			n1 = !n1;
4047 		}
4048 	    }
4049 
4050 	    /*
4051 	     * If one of the two variables is a number, compare as a number.
4052 	     * When using "=~" or "!~", always compare as string.
4053 	     */
4054 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4055 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4056 	    {
4057 		n1 = get_tv_number(rettv);
4058 		n2 = get_tv_number(&var2);
4059 		switch (type)
4060 		{
4061 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4062 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4063 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4064 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4065 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4066 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4067 		    case TYPE_UNKNOWN:
4068 		    case TYPE_MATCH:
4069 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4070 		}
4071 	    }
4072 	    else
4073 	    {
4074 		s1 = get_tv_string_buf(rettv, buf1);
4075 		s2 = get_tv_string_buf(&var2, buf2);
4076 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4077 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4078 		else
4079 		    i = 0;
4080 		n1 = FALSE;
4081 		switch (type)
4082 		{
4083 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4084 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4085 		    case TYPE_GREATER:  n1 = (i > 0); break;
4086 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4087 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4088 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4089 
4090 		    case TYPE_MATCH:
4091 		    case TYPE_NOMATCH:
4092 			    /* avoid 'l' flag in 'cpoptions' */
4093 			    save_cpo = p_cpo;
4094 			    p_cpo = (char_u *)"";
4095 			    regmatch.regprog = vim_regcomp(s2,
4096 							RE_MAGIC + RE_STRING);
4097 			    regmatch.rm_ic = ic;
4098 			    if (regmatch.regprog != NULL)
4099 			    {
4100 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4101 				vim_free(regmatch.regprog);
4102 				if (type == TYPE_NOMATCH)
4103 				    n1 = !n1;
4104 			    }
4105 			    p_cpo = save_cpo;
4106 			    break;
4107 
4108 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4109 		}
4110 	    }
4111 	    clear_tv(rettv);
4112 	    clear_tv(&var2);
4113 	    rettv->v_type = VAR_NUMBER;
4114 	    rettv->vval.v_number = n1;
4115 	}
4116     }
4117 
4118     return OK;
4119 }
4120 
4121 /*
4122  * Handle fourth level expression:
4123  *	+	number addition
4124  *	-	number subtraction
4125  *	.	string concatenation
4126  *
4127  * "arg" must point to the first non-white of the expression.
4128  * "arg" is advanced to the next non-white after the recognized expression.
4129  *
4130  * Return OK or FAIL.
4131  */
4132     static int
4133 eval5(arg, rettv, evaluate)
4134     char_u	**arg;
4135     typval_T	*rettv;
4136     int		evaluate;
4137 {
4138     typval_T	var2;
4139     typval_T	var3;
4140     int		op;
4141     long	n1, n2;
4142     char_u	*s1, *s2;
4143     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4144     char_u	*p;
4145 
4146     /*
4147      * Get the first variable.
4148      */
4149     if (eval6(arg, rettv, evaluate) == FAIL)
4150 	return FAIL;
4151 
4152     /*
4153      * Repeat computing, until no '+', '-' or '.' is following.
4154      */
4155     for (;;)
4156     {
4157 	op = **arg;
4158 	if (op != '+' && op != '-' && op != '.')
4159 	    break;
4160 
4161 	if (op != '+' || rettv->v_type != VAR_LIST)
4162 	{
4163 	    /* For "list + ...", an illegal use of the first operand as
4164 	     * a number cannot be determined before evaluating the 2nd
4165 	     * operand: if this is also a list, all is ok.
4166 	     * For "something . ...", "something - ..." or "non-list + ...",
4167 	     * we know that the first operand needs to be a string or number
4168 	     * without evaluating the 2nd operand.  So check before to avoid
4169 	     * side effects after an error. */
4170 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4171 	    {
4172 		clear_tv(rettv);
4173 		return FAIL;
4174 	    }
4175 	}
4176 
4177 	/*
4178 	 * Get the second variable.
4179 	 */
4180 	*arg = skipwhite(*arg + 1);
4181 	if (eval6(arg, &var2, evaluate) == FAIL)
4182 	{
4183 	    clear_tv(rettv);
4184 	    return FAIL;
4185 	}
4186 
4187 	if (evaluate)
4188 	{
4189 	    /*
4190 	     * Compute the result.
4191 	     */
4192 	    if (op == '.')
4193 	    {
4194 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4195 		s2 = get_tv_string_buf_chk(&var2, buf2);
4196 		if (s2 == NULL)		/* type error ? */
4197 		{
4198 		    clear_tv(rettv);
4199 		    clear_tv(&var2);
4200 		    return FAIL;
4201 		}
4202 		p = concat_str(s1, s2);
4203 		clear_tv(rettv);
4204 		rettv->v_type = VAR_STRING;
4205 		rettv->vval.v_string = p;
4206 	    }
4207 	    else if (op == '+' && rettv->v_type == VAR_LIST
4208 						   && var2.v_type == VAR_LIST)
4209 	    {
4210 		/* concatenate Lists */
4211 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4212 							       &var3) == FAIL)
4213 		{
4214 		    clear_tv(rettv);
4215 		    clear_tv(&var2);
4216 		    return FAIL;
4217 		}
4218 		clear_tv(rettv);
4219 		*rettv = var3;
4220 	    }
4221 	    else
4222 	    {
4223 		int	    error = FALSE;
4224 
4225 		n1 = get_tv_number_chk(rettv, &error);
4226 		if (error)
4227 		{
4228 		    /* This can only happen for "list + non-list".
4229 		     * For "non-list + ..." or "something - ...", we returned
4230 		     * before evaluating the 2nd operand. */
4231 		    clear_tv(rettv);
4232 		    return FAIL;
4233 		}
4234 		n2 = get_tv_number_chk(&var2, &error);
4235 		if (error)
4236 		{
4237 		    clear_tv(rettv);
4238 		    clear_tv(&var2);
4239 		    return FAIL;
4240 		}
4241 		clear_tv(rettv);
4242 		if (op == '+')
4243 		    n1 = n1 + n2;
4244 		else
4245 		    n1 = n1 - n2;
4246 		rettv->v_type = VAR_NUMBER;
4247 		rettv->vval.v_number = n1;
4248 	    }
4249 	    clear_tv(&var2);
4250 	}
4251     }
4252     return OK;
4253 }
4254 
4255 /*
4256  * Handle fifth level expression:
4257  *	*	number multiplication
4258  *	/	number division
4259  *	%	number modulo
4260  *
4261  * "arg" must point to the first non-white of the expression.
4262  * "arg" is advanced to the next non-white after the recognized expression.
4263  *
4264  * Return OK or FAIL.
4265  */
4266     static int
4267 eval6(arg, rettv, evaluate)
4268     char_u	**arg;
4269     typval_T	*rettv;
4270     int		evaluate;
4271 {
4272     typval_T	var2;
4273     int		op;
4274     long	n1, n2;
4275     int		error = FALSE;
4276 
4277     /*
4278      * Get the first variable.
4279      */
4280     if (eval7(arg, rettv, evaluate) == FAIL)
4281 	return FAIL;
4282 
4283     /*
4284      * Repeat computing, until no '*', '/' or '%' is following.
4285      */
4286     for (;;)
4287     {
4288 	op = **arg;
4289 	if (op != '*' && op != '/' && op != '%')
4290 	    break;
4291 
4292 	if (evaluate)
4293 	{
4294 	    n1 = get_tv_number_chk(rettv, &error);
4295 	    clear_tv(rettv);
4296 	    if (error)
4297 		return FAIL;
4298 	}
4299 	else
4300 	    n1 = 0;
4301 
4302 	/*
4303 	 * Get the second variable.
4304 	 */
4305 	*arg = skipwhite(*arg + 1);
4306 	if (eval7(arg, &var2, evaluate) == FAIL)
4307 	    return FAIL;
4308 
4309 	if (evaluate)
4310 	{
4311 	    n2 = get_tv_number_chk(&var2, &error);
4312 	    clear_tv(&var2);
4313 	    if (error)
4314 		return FAIL;
4315 
4316 	    /*
4317 	     * Compute the result.
4318 	     */
4319 	    if (op == '*')
4320 		n1 = n1 * n2;
4321 	    else if (op == '/')
4322 	    {
4323 		if (n2 == 0)	/* give an error message? */
4324 		    n1 = 0x7fffffffL;
4325 		else
4326 		    n1 = n1 / n2;
4327 	    }
4328 	    else
4329 	    {
4330 		if (n2 == 0)	/* give an error message? */
4331 		    n1 = 0;
4332 		else
4333 		    n1 = n1 % n2;
4334 	    }
4335 	    rettv->v_type = VAR_NUMBER;
4336 	    rettv->vval.v_number = n1;
4337 	}
4338     }
4339 
4340     return OK;
4341 }
4342 
4343 /*
4344  * Handle sixth level expression:
4345  *  number		number constant
4346  *  "string"		string contstant
4347  *  'string'		literal string contstant
4348  *  &option-name	option value
4349  *  @r			register contents
4350  *  identifier		variable value
4351  *  function()		function call
4352  *  $VAR		environment variable
4353  *  (expression)	nested expression
4354  *  [expr, expr]	List
4355  *  {key: val, key: val}  Dictionary
4356  *
4357  *  Also handle:
4358  *  ! in front		logical NOT
4359  *  - in front		unary minus
4360  *  + in front		unary plus (ignored)
4361  *  trailing []		subscript in String or List
4362  *  trailing .name	entry in Dictionary
4363  *
4364  * "arg" must point to the first non-white of the expression.
4365  * "arg" is advanced to the next non-white after the recognized expression.
4366  *
4367  * Return OK or FAIL.
4368  */
4369     static int
4370 eval7(arg, rettv, evaluate)
4371     char_u	**arg;
4372     typval_T	*rettv;
4373     int		evaluate;
4374 {
4375     long	n;
4376     int		len;
4377     char_u	*s;
4378     int		val;
4379     char_u	*start_leader, *end_leader;
4380     int		ret = OK;
4381     char_u	*alias;
4382 
4383     /*
4384      * Initialise variable so that clear_tv() can't mistake this for a
4385      * string and free a string that isn't there.
4386      */
4387     rettv->v_type = VAR_UNKNOWN;
4388 
4389     /*
4390      * Skip '!' and '-' characters.  They are handled later.
4391      */
4392     start_leader = *arg;
4393     while (**arg == '!' || **arg == '-' || **arg == '+')
4394 	*arg = skipwhite(*arg + 1);
4395     end_leader = *arg;
4396 
4397     switch (**arg)
4398     {
4399     /*
4400      * Number constant.
4401      */
4402     case '0':
4403     case '1':
4404     case '2':
4405     case '3':
4406     case '4':
4407     case '5':
4408     case '6':
4409     case '7':
4410     case '8':
4411     case '9':
4412 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4413 		*arg += len;
4414 		if (evaluate)
4415 		{
4416 		    rettv->v_type = VAR_NUMBER;
4417 		    rettv->vval.v_number = n;
4418 		}
4419 		break;
4420 
4421     /*
4422      * String constant: "string".
4423      */
4424     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4425 		break;
4426 
4427     /*
4428      * Literal string constant: 'str''ing'.
4429      */
4430     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4431 		break;
4432 
4433     /*
4434      * List: [expr, expr]
4435      */
4436     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4437 		break;
4438 
4439     /*
4440      * Dictionary: {key: val, key: val}
4441      */
4442     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4443 		break;
4444 
4445     /*
4446      * Option value: &name
4447      */
4448     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4449 		break;
4450 
4451     /*
4452      * Environment variable: $VAR.
4453      */
4454     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4455 		break;
4456 
4457     /*
4458      * Register contents: @r.
4459      */
4460     case '@':	++*arg;
4461 		if (evaluate)
4462 		{
4463 		    rettv->v_type = VAR_STRING;
4464 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4465 		}
4466 		if (**arg != NUL)
4467 		    ++*arg;
4468 		break;
4469 
4470     /*
4471      * nested expression: (expression).
4472      */
4473     case '(':	*arg = skipwhite(*arg + 1);
4474 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4475 		if (**arg == ')')
4476 		    ++*arg;
4477 		else if (ret == OK)
4478 		{
4479 		    EMSG(_("E110: Missing ')'"));
4480 		    clear_tv(rettv);
4481 		    ret = FAIL;
4482 		}
4483 		break;
4484 
4485     default:	ret = NOTDONE;
4486 		break;
4487     }
4488 
4489     if (ret == NOTDONE)
4490     {
4491 	/*
4492 	 * Must be a variable or function name.
4493 	 * Can also be a curly-braces kind of name: {expr}.
4494 	 */
4495 	s = *arg;
4496 	len = get_name_len(arg, &alias, evaluate, TRUE);
4497 	if (alias != NULL)
4498 	    s = alias;
4499 
4500 	if (len <= 0)
4501 	    ret = FAIL;
4502 	else
4503 	{
4504 	    if (**arg == '(')		/* recursive! */
4505 	    {
4506 		/* If "s" is the name of a variable of type VAR_FUNC
4507 		 * use its contents. */
4508 		s = deref_func_name(s, &len);
4509 
4510 		/* Invoke the function. */
4511 		ret = get_func_tv(s, len, rettv, arg,
4512 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4513 			  &len, evaluate, NULL);
4514 		/* Stop the expression evaluation when immediately
4515 		 * aborting on error, or when an interrupt occurred or
4516 		 * an exception was thrown but not caught. */
4517 		if (aborting())
4518 		{
4519 		    if (ret == OK)
4520 			clear_tv(rettv);
4521 		    ret = FAIL;
4522 		}
4523 	    }
4524 	    else if (evaluate)
4525 		ret = get_var_tv(s, len, rettv, TRUE);
4526 	    else
4527 		ret = OK;
4528 	}
4529 
4530 	if (alias != NULL)
4531 	    vim_free(alias);
4532     }
4533 
4534     *arg = skipwhite(*arg);
4535 
4536     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4537      * expr(expr). */
4538     if (ret == OK)
4539 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4540 
4541     /*
4542      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4543      */
4544     if (ret == OK && evaluate && end_leader > start_leader)
4545     {
4546 	int	    error = FALSE;
4547 
4548 	val = get_tv_number_chk(rettv, &error);
4549 	if (error)
4550 	{
4551 	    clear_tv(rettv);
4552 	    ret = FAIL;
4553 	}
4554 	else
4555 	{
4556 	    while (end_leader > start_leader)
4557 	    {
4558 		--end_leader;
4559 		if (*end_leader == '!')
4560 		    val = !val;
4561 		else if (*end_leader == '-')
4562 		    val = -val;
4563 	    }
4564 	    clear_tv(rettv);
4565 	    rettv->v_type = VAR_NUMBER;
4566 	    rettv->vval.v_number = val;
4567 	}
4568     }
4569 
4570     return ret;
4571 }
4572 
4573 /*
4574  * Evaluate an "[expr]" or "[expr:expr]" index.
4575  * "*arg" points to the '['.
4576  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4577  */
4578     static int
4579 eval_index(arg, rettv, evaluate, verbose)
4580     char_u	**arg;
4581     typval_T	*rettv;
4582     int		evaluate;
4583     int		verbose;	/* give error messages */
4584 {
4585     int		empty1 = FALSE, empty2 = FALSE;
4586     typval_T	var1, var2;
4587     long	n1, n2 = 0;
4588     long	len = -1;
4589     int		range = FALSE;
4590     char_u	*s;
4591     char_u	*key = NULL;
4592 
4593     if (rettv->v_type == VAR_FUNC)
4594     {
4595 	if (verbose)
4596 	    EMSG(_("E695: Cannot index a Funcref"));
4597 	return FAIL;
4598     }
4599 
4600     if (**arg == '.')
4601     {
4602 	/*
4603 	 * dict.name
4604 	 */
4605 	key = *arg + 1;
4606 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4607 	    ;
4608 	if (len == 0)
4609 	    return FAIL;
4610 	*arg = skipwhite(key + len);
4611     }
4612     else
4613     {
4614 	/*
4615 	 * something[idx]
4616 	 *
4617 	 * Get the (first) variable from inside the [].
4618 	 */
4619 	*arg = skipwhite(*arg + 1);
4620 	if (**arg == ':')
4621 	    empty1 = TRUE;
4622 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4623 	    return FAIL;
4624 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4625 	{
4626 	    /* not a number or string */
4627 	    clear_tv(&var1);
4628 	    return FAIL;
4629 	}
4630 
4631 	/*
4632 	 * Get the second variable from inside the [:].
4633 	 */
4634 	if (**arg == ':')
4635 	{
4636 	    range = TRUE;
4637 	    *arg = skipwhite(*arg + 1);
4638 	    if (**arg == ']')
4639 		empty2 = TRUE;
4640 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4641 	    {
4642 		if (!empty1)
4643 		    clear_tv(&var1);
4644 		return FAIL;
4645 	    }
4646 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4647 	    {
4648 		/* not a number or string */
4649 		if (!empty1)
4650 		    clear_tv(&var1);
4651 		clear_tv(&var2);
4652 		return FAIL;
4653 	    }
4654 	}
4655 
4656 	/* Check for the ']'. */
4657 	if (**arg != ']')
4658 	{
4659 	    if (verbose)
4660 		EMSG(_(e_missbrac));
4661 	    clear_tv(&var1);
4662 	    if (range)
4663 		clear_tv(&var2);
4664 	    return FAIL;
4665 	}
4666 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4667     }
4668 
4669     if (evaluate)
4670     {
4671 	n1 = 0;
4672 	if (!empty1 && rettv->v_type != VAR_DICT)
4673 	{
4674 	    n1 = get_tv_number(&var1);
4675 	    clear_tv(&var1);
4676 	}
4677 	if (range)
4678 	{
4679 	    if (empty2)
4680 		n2 = -1;
4681 	    else
4682 	    {
4683 		n2 = get_tv_number(&var2);
4684 		clear_tv(&var2);
4685 	    }
4686 	}
4687 
4688 	switch (rettv->v_type)
4689 	{
4690 	    case VAR_NUMBER:
4691 	    case VAR_STRING:
4692 		s = get_tv_string(rettv);
4693 		len = (long)STRLEN(s);
4694 		if (range)
4695 		{
4696 		    /* The resulting variable is a substring.  If the indexes
4697 		     * are out of range the result is empty. */
4698 		    if (n1 < 0)
4699 		    {
4700 			n1 = len + n1;
4701 			if (n1 < 0)
4702 			    n1 = 0;
4703 		    }
4704 		    if (n2 < 0)
4705 			n2 = len + n2;
4706 		    else if (n2 >= len)
4707 			n2 = len;
4708 		    if (n1 >= len || n2 < 0 || n1 > n2)
4709 			s = NULL;
4710 		    else
4711 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4712 		}
4713 		else
4714 		{
4715 		    /* The resulting variable is a string of a single
4716 		     * character.  If the index is too big or negative the
4717 		     * result is empty. */
4718 		    if (n1 >= len || n1 < 0)
4719 			s = NULL;
4720 		    else
4721 			s = vim_strnsave(s + n1, 1);
4722 		}
4723 		clear_tv(rettv);
4724 		rettv->v_type = VAR_STRING;
4725 		rettv->vval.v_string = s;
4726 		break;
4727 
4728 	    case VAR_LIST:
4729 		len = list_len(rettv->vval.v_list);
4730 		if (n1 < 0)
4731 		    n1 = len + n1;
4732 		if (!empty1 && (n1 < 0 || n1 >= len))
4733 		{
4734 		    if (verbose)
4735 			EMSGN(_(e_listidx), n1);
4736 		    return FAIL;
4737 		}
4738 		if (range)
4739 		{
4740 		    list_T	*l;
4741 		    listitem_T	*item;
4742 
4743 		    if (n2 < 0)
4744 			n2 = len + n2;
4745 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4746 		    {
4747 			if (verbose)
4748 			    EMSGN(_(e_listidx), n2);
4749 			return FAIL;
4750 		    }
4751 		    l = list_alloc();
4752 		    if (l == NULL)
4753 			return FAIL;
4754 		    for (item = list_find(rettv->vval.v_list, n1);
4755 							       n1 <= n2; ++n1)
4756 		    {
4757 			if (list_append_tv(l, &item->li_tv) == FAIL)
4758 			{
4759 			    list_free(l);
4760 			    return FAIL;
4761 			}
4762 			item = item->li_next;
4763 		    }
4764 		    clear_tv(rettv);
4765 		    rettv->v_type = VAR_LIST;
4766 		    rettv->vval.v_list = l;
4767 		    ++l->lv_refcount;
4768 		}
4769 		else
4770 		{
4771 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4772 								       &var1);
4773 		    clear_tv(rettv);
4774 		    *rettv = var1;
4775 		}
4776 		break;
4777 
4778 	    case VAR_DICT:
4779 		if (range)
4780 		{
4781 		    if (verbose)
4782 			EMSG(_(e_dictrange));
4783 		    if (len == -1)
4784 			clear_tv(&var1);
4785 		    return FAIL;
4786 		}
4787 		{
4788 		    dictitem_T	*item;
4789 
4790 		    if (len == -1)
4791 		    {
4792 			key = get_tv_string(&var1);
4793 			if (*key == NUL)
4794 			{
4795 			    if (verbose)
4796 				EMSG(_(e_emptykey));
4797 			    clear_tv(&var1);
4798 			    return FAIL;
4799 			}
4800 		    }
4801 
4802 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4803 
4804 		    if (item == NULL && verbose)
4805 			EMSG2(_(e_dictkey), key);
4806 		    if (len == -1)
4807 			clear_tv(&var1);
4808 		    if (item == NULL)
4809 			return FAIL;
4810 
4811 		    copy_tv(&item->di_tv, &var1);
4812 		    clear_tv(rettv);
4813 		    *rettv = var1;
4814 		}
4815 		break;
4816 	}
4817     }
4818 
4819     return OK;
4820 }
4821 
4822 /*
4823  * Get an option value.
4824  * "arg" points to the '&' or '+' before the option name.
4825  * "arg" is advanced to character after the option name.
4826  * Return OK or FAIL.
4827  */
4828     static int
4829 get_option_tv(arg, rettv, evaluate)
4830     char_u	**arg;
4831     typval_T	*rettv;	/* when NULL, only check if option exists */
4832     int		evaluate;
4833 {
4834     char_u	*option_end;
4835     long	numval;
4836     char_u	*stringval;
4837     int		opt_type;
4838     int		c;
4839     int		working = (**arg == '+');    /* has("+option") */
4840     int		ret = OK;
4841     int		opt_flags;
4842 
4843     /*
4844      * Isolate the option name and find its value.
4845      */
4846     option_end = find_option_end(arg, &opt_flags);
4847     if (option_end == NULL)
4848     {
4849 	if (rettv != NULL)
4850 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4851 	return FAIL;
4852     }
4853 
4854     if (!evaluate)
4855     {
4856 	*arg = option_end;
4857 	return OK;
4858     }
4859 
4860     c = *option_end;
4861     *option_end = NUL;
4862     opt_type = get_option_value(*arg, &numval,
4863 			       rettv == NULL ? NULL : &stringval, opt_flags);
4864 
4865     if (opt_type == -3)			/* invalid name */
4866     {
4867 	if (rettv != NULL)
4868 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4869 	ret = FAIL;
4870     }
4871     else if (rettv != NULL)
4872     {
4873 	if (opt_type == -2)		/* hidden string option */
4874 	{
4875 	    rettv->v_type = VAR_STRING;
4876 	    rettv->vval.v_string = NULL;
4877 	}
4878 	else if (opt_type == -1)	/* hidden number option */
4879 	{
4880 	    rettv->v_type = VAR_NUMBER;
4881 	    rettv->vval.v_number = 0;
4882 	}
4883 	else if (opt_type == 1)		/* number option */
4884 	{
4885 	    rettv->v_type = VAR_NUMBER;
4886 	    rettv->vval.v_number = numval;
4887 	}
4888 	else				/* string option */
4889 	{
4890 	    rettv->v_type = VAR_STRING;
4891 	    rettv->vval.v_string = stringval;
4892 	}
4893     }
4894     else if (working && (opt_type == -2 || opt_type == -1))
4895 	ret = FAIL;
4896 
4897     *option_end = c;		    /* put back for error messages */
4898     *arg = option_end;
4899 
4900     return ret;
4901 }
4902 
4903 /*
4904  * Allocate a variable for a string constant.
4905  * Return OK or FAIL.
4906  */
4907     static int
4908 get_string_tv(arg, rettv, evaluate)
4909     char_u	**arg;
4910     typval_T	*rettv;
4911     int		evaluate;
4912 {
4913     char_u	*p;
4914     char_u	*name;
4915     int		extra = 0;
4916 
4917     /*
4918      * Find the end of the string, skipping backslashed characters.
4919      */
4920     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4921     {
4922 	if (*p == '\\' && p[1] != NUL)
4923 	{
4924 	    ++p;
4925 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4926 	     * to 6 characters: reserve space for 2 extra */
4927 	    if (*p == '<')
4928 		extra += 2;
4929 	}
4930     }
4931 
4932     if (*p != '"')
4933     {
4934 	EMSG2(_("E114: Missing quote: %s"), *arg);
4935 	return FAIL;
4936     }
4937 
4938     /* If only parsing, set *arg and return here */
4939     if (!evaluate)
4940     {
4941 	*arg = p + 1;
4942 	return OK;
4943     }
4944 
4945     /*
4946      * Copy the string into allocated memory, handling backslashed
4947      * characters.
4948      */
4949     name = alloc((unsigned)(p - *arg + extra));
4950     if (name == NULL)
4951 	return FAIL;
4952     rettv->v_type = VAR_STRING;
4953     rettv->vval.v_string = name;
4954 
4955     for (p = *arg + 1; *p != NUL && *p != '"'; )
4956     {
4957 	if (*p == '\\')
4958 	{
4959 	    switch (*++p)
4960 	    {
4961 		case 'b': *name++ = BS; ++p; break;
4962 		case 'e': *name++ = ESC; ++p; break;
4963 		case 'f': *name++ = FF; ++p; break;
4964 		case 'n': *name++ = NL; ++p; break;
4965 		case 'r': *name++ = CAR; ++p; break;
4966 		case 't': *name++ = TAB; ++p; break;
4967 
4968 		case 'X': /* hex: "\x1", "\x12" */
4969 		case 'x':
4970 		case 'u': /* Unicode: "\u0023" */
4971 		case 'U':
4972 			  if (vim_isxdigit(p[1]))
4973 			  {
4974 			      int	n, nr;
4975 			      int	c = toupper(*p);
4976 
4977 			      if (c == 'X')
4978 				  n = 2;
4979 			      else
4980 				  n = 4;
4981 			      nr = 0;
4982 			      while (--n >= 0 && vim_isxdigit(p[1]))
4983 			      {
4984 				  ++p;
4985 				  nr = (nr << 4) + hex2nr(*p);
4986 			      }
4987 			      ++p;
4988 #ifdef FEAT_MBYTE
4989 			      /* For "\u" store the number according to
4990 			       * 'encoding'. */
4991 			      if (c != 'X')
4992 				  name += (*mb_char2bytes)(nr, name);
4993 			      else
4994 #endif
4995 				  *name++ = nr;
4996 			  }
4997 			  break;
4998 
4999 			  /* octal: "\1", "\12", "\123" */
5000 		case '0':
5001 		case '1':
5002 		case '2':
5003 		case '3':
5004 		case '4':
5005 		case '5':
5006 		case '6':
5007 		case '7': *name = *p++ - '0';
5008 			  if (*p >= '0' && *p <= '7')
5009 			  {
5010 			      *name = (*name << 3) + *p++ - '0';
5011 			      if (*p >= '0' && *p <= '7')
5012 				  *name = (*name << 3) + *p++ - '0';
5013 			  }
5014 			  ++name;
5015 			  break;
5016 
5017 			    /* Special key, e.g.: "\<C-W>" */
5018 		case '<': extra = trans_special(&p, name, TRUE);
5019 			  if (extra != 0)
5020 			  {
5021 			      name += extra;
5022 			      break;
5023 			  }
5024 			  /* FALLTHROUGH */
5025 
5026 		default:  MB_COPY_CHAR(p, name);
5027 			  break;
5028 	    }
5029 	}
5030 	else
5031 	    MB_COPY_CHAR(p, name);
5032 
5033     }
5034     *name = NUL;
5035     *arg = p + 1;
5036 
5037     return OK;
5038 }
5039 
5040 /*
5041  * Allocate a variable for a 'str''ing' constant.
5042  * Return OK or FAIL.
5043  */
5044     static int
5045 get_lit_string_tv(arg, rettv, evaluate)
5046     char_u	**arg;
5047     typval_T	*rettv;
5048     int		evaluate;
5049 {
5050     char_u	*p;
5051     char_u	*str;
5052     int		reduce = 0;
5053 
5054     /*
5055      * Find the end of the string, skipping ''.
5056      */
5057     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5058     {
5059 	if (*p == '\'')
5060 	{
5061 	    if (p[1] != '\'')
5062 		break;
5063 	    ++reduce;
5064 	    ++p;
5065 	}
5066     }
5067 
5068     if (*p != '\'')
5069     {
5070 	EMSG2(_("E115: Missing quote: %s"), *arg);
5071 	return FAIL;
5072     }
5073 
5074     /* If only parsing return after setting "*arg" */
5075     if (!evaluate)
5076     {
5077 	*arg = p + 1;
5078 	return OK;
5079     }
5080 
5081     /*
5082      * Copy the string into allocated memory, handling '' to ' reduction.
5083      */
5084     str = alloc((unsigned)((p - *arg) - reduce));
5085     if (str == NULL)
5086 	return FAIL;
5087     rettv->v_type = VAR_STRING;
5088     rettv->vval.v_string = str;
5089 
5090     for (p = *arg + 1; *p != NUL; )
5091     {
5092 	if (*p == '\'')
5093 	{
5094 	    if (p[1] != '\'')
5095 		break;
5096 	    ++p;
5097 	}
5098 	MB_COPY_CHAR(p, str);
5099     }
5100     *str = NUL;
5101     *arg = p + 1;
5102 
5103     return OK;
5104 }
5105 
5106 /*
5107  * Allocate a variable for a List and fill it from "*arg".
5108  * Return OK or FAIL.
5109  */
5110     static int
5111 get_list_tv(arg, rettv, evaluate)
5112     char_u	**arg;
5113     typval_T	*rettv;
5114     int		evaluate;
5115 {
5116     list_T	*l = NULL;
5117     typval_T	tv;
5118     listitem_T	*item;
5119 
5120     if (evaluate)
5121     {
5122 	l = list_alloc();
5123 	if (l == NULL)
5124 	    return FAIL;
5125     }
5126 
5127     *arg = skipwhite(*arg + 1);
5128     while (**arg != ']' && **arg != NUL)
5129     {
5130 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5131 	    goto failret;
5132 	if (evaluate)
5133 	{
5134 	    item = listitem_alloc();
5135 	    if (item != NULL)
5136 	    {
5137 		item->li_tv = tv;
5138 		item->li_tv.v_lock = 0;
5139 		list_append(l, item);
5140 	    }
5141 	    else
5142 		clear_tv(&tv);
5143 	}
5144 
5145 	if (**arg == ']')
5146 	    break;
5147 	if (**arg != ',')
5148 	{
5149 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5150 	    goto failret;
5151 	}
5152 	*arg = skipwhite(*arg + 1);
5153     }
5154 
5155     if (**arg != ']')
5156     {
5157 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5158 failret:
5159 	if (evaluate)
5160 	    list_free(l);
5161 	return FAIL;
5162     }
5163 
5164     *arg = skipwhite(*arg + 1);
5165     if (evaluate)
5166     {
5167 	rettv->v_type = VAR_LIST;
5168 	rettv->vval.v_list = l;
5169 	++l->lv_refcount;
5170     }
5171 
5172     return OK;
5173 }
5174 
5175 /*
5176  * Allocate an empty header for a list.
5177  */
5178     static list_T *
5179 list_alloc()
5180 {
5181     list_T  *l;
5182 
5183     l = (list_T *)alloc_clear(sizeof(list_T));
5184     if (l != NULL)
5185     {
5186 	/* Prepend the list to the list of lists for garbage collection. */
5187 	if (first_list != NULL)
5188 	    first_list->lv_used_prev = l;
5189 	l->lv_used_prev = NULL;
5190 	l->lv_used_next = first_list;
5191 	first_list = l;
5192     }
5193     return l;
5194 }
5195 
5196 /*
5197  * Unreference a list: decrement the reference count and free it when it
5198  * becomes zero.
5199  */
5200     void
5201 list_unref(l)
5202     list_T *l;
5203 {
5204     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5205 	list_free(l);
5206 }
5207 
5208 /*
5209  * Free a list, including all items it points to.
5210  * Ignores the reference count.
5211  */
5212     static void
5213 list_free(l)
5214     list_T *l;
5215 {
5216     listitem_T *item;
5217 
5218     /* Avoid that recursive reference to the list frees us again. */
5219     l->lv_refcount = DEL_REFCOUNT;
5220 
5221     /* Remove the list from the list of lists for garbage collection. */
5222     if (l->lv_used_prev == NULL)
5223 	first_list = l->lv_used_next;
5224     else
5225 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5226     if (l->lv_used_next != NULL)
5227 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5228 
5229     for (item = l->lv_first; item != NULL; item = l->lv_first)
5230     {
5231 	/* Remove the item before deleting it. */
5232 	l->lv_first = item->li_next;
5233 	listitem_free(item);
5234     }
5235     vim_free(l);
5236 }
5237 
5238 /*
5239  * Allocate a list item.
5240  */
5241     static listitem_T *
5242 listitem_alloc()
5243 {
5244     return (listitem_T *)alloc(sizeof(listitem_T));
5245 }
5246 
5247 /*
5248  * Free a list item.  Also clears the value.  Does not notify watchers.
5249  */
5250     static void
5251 listitem_free(item)
5252     listitem_T *item;
5253 {
5254     clear_tv(&item->li_tv);
5255     vim_free(item);
5256 }
5257 
5258 /*
5259  * Remove a list item from a List and free it.  Also clears the value.
5260  */
5261     static void
5262 listitem_remove(l, item)
5263     list_T  *l;
5264     listitem_T *item;
5265 {
5266     list_remove(l, item, item);
5267     listitem_free(item);
5268 }
5269 
5270 /*
5271  * Get the number of items in a list.
5272  */
5273     static long
5274 list_len(l)
5275     list_T	*l;
5276 {
5277     if (l == NULL)
5278 	return 0L;
5279     return l->lv_len;
5280 }
5281 
5282 /*
5283  * Return TRUE when two lists have exactly the same values.
5284  */
5285     static int
5286 list_equal(l1, l2, ic)
5287     list_T	*l1;
5288     list_T	*l2;
5289     int		ic;	/* ignore case for strings */
5290 {
5291     listitem_T	*item1, *item2;
5292 
5293     if (list_len(l1) != list_len(l2))
5294 	return FALSE;
5295 
5296     for (item1 = l1->lv_first, item2 = l2->lv_first;
5297 	    item1 != NULL && item2 != NULL;
5298 			       item1 = item1->li_next, item2 = item2->li_next)
5299 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5300 	    return FALSE;
5301     return item1 == NULL && item2 == NULL;
5302 }
5303 
5304 /*
5305  * Return TRUE when two dictionaries have exactly the same key/values.
5306  */
5307     static int
5308 dict_equal(d1, d2, ic)
5309     dict_T	*d1;
5310     dict_T	*d2;
5311     int		ic;	/* ignore case for strings */
5312 {
5313     hashitem_T	*hi;
5314     dictitem_T	*item2;
5315     int		todo;
5316 
5317     if (dict_len(d1) != dict_len(d2))
5318 	return FALSE;
5319 
5320     todo = d1->dv_hashtab.ht_used;
5321     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5322     {
5323 	if (!HASHITEM_EMPTY(hi))
5324 	{
5325 	    item2 = dict_find(d2, hi->hi_key, -1);
5326 	    if (item2 == NULL)
5327 		return FALSE;
5328 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5329 		return FALSE;
5330 	    --todo;
5331 	}
5332     }
5333     return TRUE;
5334 }
5335 
5336 /*
5337  * Return TRUE if "tv1" and "tv2" have the same value.
5338  * Compares the items just like "==" would compare them, but strings and
5339  * numbers are different.
5340  */
5341     static int
5342 tv_equal(tv1, tv2, ic)
5343     typval_T *tv1;
5344     typval_T *tv2;
5345     int	    ic;	    /* ignore case */
5346 {
5347     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5348     char_u	*s1, *s2;
5349 
5350     if (tv1->v_type != tv2->v_type)
5351 	return FALSE;
5352 
5353     switch (tv1->v_type)
5354     {
5355 	case VAR_LIST:
5356 	    /* recursive! */
5357 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5358 
5359 	case VAR_DICT:
5360 	    /* recursive! */
5361 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5362 
5363 	case VAR_FUNC:
5364 	    return (tv1->vval.v_string != NULL
5365 		    && tv2->vval.v_string != NULL
5366 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5367 
5368 	case VAR_NUMBER:
5369 	    return tv1->vval.v_number == tv2->vval.v_number;
5370 
5371 	case VAR_STRING:
5372 	    s1 = get_tv_string_buf(tv1, buf1);
5373 	    s2 = get_tv_string_buf(tv2, buf2);
5374 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5375     }
5376 
5377     EMSG2(_(e_intern2), "tv_equal()");
5378     return TRUE;
5379 }
5380 
5381 /*
5382  * Locate item with index "n" in list "l" and return it.
5383  * A negative index is counted from the end; -1 is the last item.
5384  * Returns NULL when "n" is out of range.
5385  */
5386     static listitem_T *
5387 list_find(l, n)
5388     list_T	*l;
5389     long	n;
5390 {
5391     listitem_T	*item;
5392     long	idx;
5393 
5394     if (l == NULL)
5395 	return NULL;
5396 
5397     /* Negative index is relative to the end. */
5398     if (n < 0)
5399 	n = l->lv_len + n;
5400 
5401     /* Check for index out of range. */
5402     if (n < 0 || n >= l->lv_len)
5403 	return NULL;
5404 
5405     /* When there is a cached index may start search from there. */
5406     if (l->lv_idx_item != NULL)
5407     {
5408 	if (n < l->lv_idx / 2)
5409 	{
5410 	    /* closest to the start of the list */
5411 	    item = l->lv_first;
5412 	    idx = 0;
5413 	}
5414 	else if (n > (l->lv_idx + l->lv_len) / 2)
5415 	{
5416 	    /* closest to the end of the list */
5417 	    item = l->lv_last;
5418 	    idx = l->lv_len - 1;
5419 	}
5420 	else
5421 	{
5422 	    /* closest to the cached index */
5423 	    item = l->lv_idx_item;
5424 	    idx = l->lv_idx;
5425 	}
5426     }
5427     else
5428     {
5429 	if (n < l->lv_len / 2)
5430 	{
5431 	    /* closest to the start of the list */
5432 	    item = l->lv_first;
5433 	    idx = 0;
5434 	}
5435 	else
5436 	{
5437 	    /* closest to the end of the list */
5438 	    item = l->lv_last;
5439 	    idx = l->lv_len - 1;
5440 	}
5441     }
5442 
5443     while (n > idx)
5444     {
5445 	/* search forward */
5446 	item = item->li_next;
5447 	++idx;
5448     }
5449     while (n < idx)
5450     {
5451 	/* search backward */
5452 	item = item->li_prev;
5453 	--idx;
5454     }
5455 
5456     /* cache the used index */
5457     l->lv_idx = idx;
5458     l->lv_idx_item = item;
5459 
5460     return item;
5461 }
5462 
5463 /*
5464  * Locate "item" list "l" and return its index.
5465  * Returns -1 when "item" is not in the list.
5466  */
5467     static long
5468 list_idx_of_item(l, item)
5469     list_T	*l;
5470     listitem_T	*item;
5471 {
5472     long	idx = 0;
5473     listitem_T	*li;
5474 
5475     if (l == NULL)
5476 	return -1;
5477     idx = 0;
5478     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5479 	++idx;
5480     if (li == NULL)
5481 	return -1;
5482     return idx;
5483 }
5484 
5485 /*
5486  * Append item "item" to the end of list "l".
5487  */
5488     static void
5489 list_append(l, item)
5490     list_T	*l;
5491     listitem_T	*item;
5492 {
5493     if (l->lv_last == NULL)
5494     {
5495 	/* empty list */
5496 	l->lv_first = item;
5497 	l->lv_last = item;
5498 	item->li_prev = NULL;
5499     }
5500     else
5501     {
5502 	l->lv_last->li_next = item;
5503 	item->li_prev = l->lv_last;
5504 	l->lv_last = item;
5505     }
5506     ++l->lv_len;
5507     item->li_next = NULL;
5508 }
5509 
5510 /*
5511  * Append typval_T "tv" to the end of list "l".
5512  * Return FAIL when out of memory.
5513  */
5514     static int
5515 list_append_tv(l, tv)
5516     list_T	*l;
5517     typval_T	*tv;
5518 {
5519     listitem_T	*li = listitem_alloc();
5520 
5521     if (li == NULL)
5522 	return FAIL;
5523     copy_tv(tv, &li->li_tv);
5524     list_append(l, li);
5525     return OK;
5526 }
5527 
5528 /*
5529  * Add a dictionary to a list.  Used by getqflist().
5530  * Return FAIL when out of memory.
5531  */
5532     int
5533 list_append_dict(list, dict)
5534     list_T	*list;
5535     dict_T	*dict;
5536 {
5537     listitem_T	*li = listitem_alloc();
5538 
5539     if (li == NULL)
5540 	return FAIL;
5541     li->li_tv.v_type = VAR_DICT;
5542     li->li_tv.v_lock = 0;
5543     li->li_tv.vval.v_dict = dict;
5544     list_append(list, li);
5545     ++dict->dv_refcount;
5546     return OK;
5547 }
5548 
5549 /*
5550  * Insert typval_T "tv" in list "l" before "item".
5551  * If "item" is NULL append at the end.
5552  * Return FAIL when out of memory.
5553  */
5554     static int
5555 list_insert_tv(l, tv, item)
5556     list_T	*l;
5557     typval_T	*tv;
5558     listitem_T	*item;
5559 {
5560     listitem_T	*ni = listitem_alloc();
5561 
5562     if (ni == NULL)
5563 	return FAIL;
5564     copy_tv(tv, &ni->li_tv);
5565     if (item == NULL)
5566 	/* Append new item at end of list. */
5567 	list_append(l, ni);
5568     else
5569     {
5570 	/* Insert new item before existing item. */
5571 	ni->li_prev = item->li_prev;
5572 	ni->li_next = item;
5573 	if (item->li_prev == NULL)
5574 	{
5575 	    l->lv_first = ni;
5576 	    ++l->lv_idx;
5577 	}
5578 	else
5579 	{
5580 	    item->li_prev->li_next = ni;
5581 	    l->lv_idx_item = NULL;
5582 	}
5583 	item->li_prev = ni;
5584 	++l->lv_len;
5585     }
5586     return OK;
5587 }
5588 
5589 /*
5590  * Extend "l1" with "l2".
5591  * If "bef" is NULL append at the end, otherwise insert before this item.
5592  * Returns FAIL when out of memory.
5593  */
5594     static int
5595 list_extend(l1, l2, bef)
5596     list_T	*l1;
5597     list_T	*l2;
5598     listitem_T	*bef;
5599 {
5600     listitem_T	*item;
5601 
5602     for (item = l2->lv_first; item != NULL; item = item->li_next)
5603 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5604 	    return FAIL;
5605     return OK;
5606 }
5607 
5608 /*
5609  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5610  * Return FAIL when out of memory.
5611  */
5612     static int
5613 list_concat(l1, l2, tv)
5614     list_T	*l1;
5615     list_T	*l2;
5616     typval_T	*tv;
5617 {
5618     list_T	*l;
5619 
5620     /* make a copy of the first list. */
5621     l = list_copy(l1, FALSE, 0);
5622     if (l == NULL)
5623 	return FAIL;
5624     tv->v_type = VAR_LIST;
5625     tv->vval.v_list = l;
5626 
5627     /* append all items from the second list */
5628     return list_extend(l, l2, NULL);
5629 }
5630 
5631 /*
5632  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5633  * The refcount of the new list is set to 1.
5634  * See item_copy() for "copyID".
5635  * Returns NULL when out of memory.
5636  */
5637     static list_T *
5638 list_copy(orig, deep, copyID)
5639     list_T	*orig;
5640     int		deep;
5641     int		copyID;
5642 {
5643     list_T	*copy;
5644     listitem_T	*item;
5645     listitem_T	*ni;
5646 
5647     if (orig == NULL)
5648 	return NULL;
5649 
5650     copy = list_alloc();
5651     if (copy != NULL)
5652     {
5653 	if (copyID != 0)
5654 	{
5655 	    /* Do this before adding the items, because one of the items may
5656 	     * refer back to this list. */
5657 	    orig->lv_copyID = copyID;
5658 	    orig->lv_copylist = copy;
5659 	}
5660 	for (item = orig->lv_first; item != NULL && !got_int;
5661 							 item = item->li_next)
5662 	{
5663 	    ni = listitem_alloc();
5664 	    if (ni == NULL)
5665 		break;
5666 	    if (deep)
5667 	    {
5668 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5669 		{
5670 		    vim_free(ni);
5671 		    break;
5672 		}
5673 	    }
5674 	    else
5675 		copy_tv(&item->li_tv, &ni->li_tv);
5676 	    list_append(copy, ni);
5677 	}
5678 	++copy->lv_refcount;
5679 	if (item != NULL)
5680 	{
5681 	    list_unref(copy);
5682 	    copy = NULL;
5683 	}
5684     }
5685 
5686     return copy;
5687 }
5688 
5689 /*
5690  * Remove items "item" to "item2" from list "l".
5691  * Does not free the listitem or the value!
5692  */
5693     static void
5694 list_remove(l, item, item2)
5695     list_T	*l;
5696     listitem_T	*item;
5697     listitem_T	*item2;
5698 {
5699     listitem_T	*ip;
5700 
5701     /* notify watchers */
5702     for (ip = item; ip != NULL; ip = ip->li_next)
5703     {
5704 	--l->lv_len;
5705 	list_fix_watch(l, ip);
5706 	if (ip == item2)
5707 	    break;
5708     }
5709 
5710     if (item2->li_next == NULL)
5711 	l->lv_last = item->li_prev;
5712     else
5713 	item2->li_next->li_prev = item->li_prev;
5714     if (item->li_prev == NULL)
5715 	l->lv_first = item2->li_next;
5716     else
5717 	item->li_prev->li_next = item2->li_next;
5718     l->lv_idx_item = NULL;
5719 }
5720 
5721 /*
5722  * Return an allocated string with the string representation of a list.
5723  * May return NULL.
5724  */
5725     static char_u *
5726 list2string(tv)
5727     typval_T	*tv;
5728 {
5729     garray_T	ga;
5730 
5731     if (tv->vval.v_list == NULL)
5732 	return NULL;
5733     ga_init2(&ga, (int)sizeof(char), 80);
5734     ga_append(&ga, '[');
5735     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE) == FAIL)
5736     {
5737 	vim_free(ga.ga_data);
5738 	return NULL;
5739     }
5740     ga_append(&ga, ']');
5741     ga_append(&ga, NUL);
5742     return (char_u *)ga.ga_data;
5743 }
5744 
5745 /*
5746  * Join list "l" into a string in "*gap", using separator "sep".
5747  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5748  * Return FAIL or OK.
5749  */
5750     static int
5751 list_join(gap, l, sep, echo)
5752     garray_T	*gap;
5753     list_T	*l;
5754     char_u	*sep;
5755     int		echo;
5756 {
5757     int		first = TRUE;
5758     char_u	*tofree;
5759     char_u	numbuf[NUMBUFLEN];
5760     listitem_T	*item;
5761     char_u	*s;
5762 
5763     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5764     {
5765 	if (first)
5766 	    first = FALSE;
5767 	else
5768 	    ga_concat(gap, sep);
5769 
5770 	if (echo)
5771 	    s = echo_string(&item->li_tv, &tofree, numbuf);
5772 	else
5773 	    s = tv2string(&item->li_tv, &tofree, numbuf);
5774 	if (s != NULL)
5775 	    ga_concat(gap, s);
5776 	vim_free(tofree);
5777 	if (s == NULL)
5778 	    return FAIL;
5779     }
5780     return OK;
5781 }
5782 
5783 /*
5784  * Garbage collection for lists and dictionaries.
5785  *
5786  * We use reference counts to be able to free most items right away when they
5787  * are no longer used.  But for composite items it's possible that it becomes
5788  * unused while the reference count is > 0: When there is a recursive
5789  * reference.  Example:
5790  *	:let l = [1, 2, 3]
5791  *	:let d = {9: l}
5792  *	:let l[1] = d
5793  *
5794  * Since this is quite unusual we handle this with garbage collection: every
5795  * once in a while find out which lists and dicts are not referenced from any
5796  * variable.
5797  *
5798  * Here is a good reference text about garbage collection (refers to Python
5799  * but it applies to all reference-counting mechanisms):
5800  *	http://python.ca/nas/python/gc/
5801  */
5802 
5803 /*
5804  * Do garbage collection for lists and dicts.
5805  * Return TRUE if some memory was freed.
5806  */
5807     int
5808 garbage_collect()
5809 {
5810     dict_T	*dd;
5811     list_T	*ll;
5812     int		copyID = ++current_copyID;
5813     buf_T	*buf;
5814     win_T	*wp;
5815     int		i;
5816     funccall_T	*fc;
5817     int		did_free = FALSE;
5818 
5819     /*
5820      * 1. Go through all accessible variables and mark all lists and dicts
5821      *    with copyID.
5822      */
5823     /* script-local variables */
5824     for (i = 1; i <= ga_scripts.ga_len; ++i)
5825 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5826 
5827     /* buffer-local variables */
5828     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5829 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5830 
5831     /* window-local variables */
5832     FOR_ALL_WINDOWS(wp)
5833 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5834 
5835     /* global variables */
5836     set_ref_in_ht(&globvarht, copyID);
5837 
5838     /* function-local variables */
5839     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5840     {
5841 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5842 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5843     }
5844 
5845     /*
5846      * 2. Go through the list of dicts and free items without the copyID.
5847      */
5848     for (dd = first_dict; dd != NULL; )
5849 	if (dd->dv_copyID != copyID)
5850 	{
5851 	    dict_free(dd);
5852 	    did_free = TRUE;
5853 
5854 	    /* restart, next dict may also have been freed */
5855 	    dd = first_dict;
5856 	}
5857 	else
5858 	    dd = dd->dv_used_next;
5859 
5860     /*
5861      * 3. Go through the list of lists and free items without the copyID.
5862      */
5863     for (ll = first_list; ll != NULL; )
5864 	if (ll->lv_copyID != copyID)
5865 	{
5866 	    list_free(ll);
5867 	    did_free = TRUE;
5868 
5869 	    /* restart, next dict may also have been freed */
5870 	    ll = first_list;
5871 	}
5872 	else
5873 	    ll = ll->lv_used_next;
5874 
5875     return did_free;
5876 }
5877 
5878 /*
5879  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
5880  */
5881     static void
5882 set_ref_in_ht(ht, copyID)
5883     hashtab_T	*ht;
5884     int		copyID;
5885 {
5886     int		todo;
5887     hashitem_T	*hi;
5888 
5889     todo = ht->ht_used;
5890     for (hi = ht->ht_array; todo > 0; ++hi)
5891 	if (!HASHITEM_EMPTY(hi))
5892 	{
5893 	    --todo;
5894 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
5895 	}
5896 }
5897 
5898 /*
5899  * Mark all lists and dicts referenced through list "l" with "copyID".
5900  */
5901     static void
5902 set_ref_in_list(l, copyID)
5903     list_T	*l;
5904     int		copyID;
5905 {
5906     listitem_T *li;
5907 
5908     for (li = l->lv_first; li != NULL; li = li->li_next)
5909 	set_ref_in_item(&li->li_tv, copyID);
5910 }
5911 
5912 /*
5913  * Mark all lists and dicts referenced through typval "tv" with "copyID".
5914  */
5915     static void
5916 set_ref_in_item(tv, copyID)
5917     typval_T	*tv;
5918     int		copyID;
5919 {
5920     dict_T	*dd;
5921     list_T	*ll;
5922 
5923     switch (tv->v_type)
5924     {
5925 	case VAR_DICT:
5926 	    dd = tv->vval.v_dict;
5927 	    if (dd->dv_copyID != copyID)
5928 	    {
5929 		/* Didn't see this dict yet. */
5930 		dd->dv_copyID = copyID;
5931 		set_ref_in_ht(&dd->dv_hashtab, copyID);
5932 	    }
5933 	    break;
5934 
5935 	case VAR_LIST:
5936 	    ll = tv->vval.v_list;
5937 	    if (ll->lv_copyID != copyID)
5938 	    {
5939 		/* Didn't see this list yet. */
5940 		ll->lv_copyID = copyID;
5941 		set_ref_in_list(ll, copyID);
5942 	    }
5943 	    break;
5944     }
5945     return;
5946 }
5947 
5948 /*
5949  * Allocate an empty header for a dictionary.
5950  */
5951     dict_T *
5952 dict_alloc()
5953 {
5954     dict_T *d;
5955 
5956     d = (dict_T *)alloc(sizeof(dict_T));
5957     if (d != NULL)
5958     {
5959 	/* Add the list to the hashtable for garbage collection. */
5960 	if (first_dict != NULL)
5961 	    first_dict->dv_used_prev = d;
5962 	d->dv_used_next = first_dict;
5963 	d->dv_used_prev = NULL;
5964 
5965 	hash_init(&d->dv_hashtab);
5966 	d->dv_lock = 0;
5967 	d->dv_refcount = 0;
5968 	d->dv_copyID = 0;
5969     }
5970     return d;
5971 }
5972 
5973 /*
5974  * Unreference a Dictionary: decrement the reference count and free it when it
5975  * becomes zero.
5976  */
5977     static void
5978 dict_unref(d)
5979     dict_T *d;
5980 {
5981     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
5982 	dict_free(d);
5983 }
5984 
5985 /*
5986  * Free a Dictionary, including all items it contains.
5987  * Ignores the reference count.
5988  */
5989     static void
5990 dict_free(d)
5991     dict_T *d;
5992 {
5993     int		todo;
5994     hashitem_T	*hi;
5995     dictitem_T	*di;
5996 
5997     /* Avoid that recursive reference to the dict frees us again. */
5998     d->dv_refcount = DEL_REFCOUNT;
5999 
6000     /* Remove the dict from the list of dicts for garbage collection. */
6001     if (d->dv_used_prev == NULL)
6002 	first_dict = d->dv_used_next;
6003     else
6004 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6005     if (d->dv_used_next != NULL)
6006 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6007 
6008     /* Lock the hashtab, we don't want it to resize while freeing items. */
6009     hash_lock(&d->dv_hashtab);
6010     todo = d->dv_hashtab.ht_used;
6011     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6012     {
6013 	if (!HASHITEM_EMPTY(hi))
6014 	{
6015 	    /* Remove the item before deleting it, just in case there is
6016 	     * something recursive causing trouble. */
6017 	    di = HI2DI(hi);
6018 	    hash_remove(&d->dv_hashtab, hi);
6019 	    dictitem_free(di);
6020 	    --todo;
6021 	}
6022     }
6023     hash_clear(&d->dv_hashtab);
6024     vim_free(d);
6025 }
6026 
6027 /*
6028  * Allocate a Dictionary item.
6029  * The "key" is copied to the new item.
6030  * Note that the value of the item "di_tv" still needs to be initialized!
6031  * Returns NULL when out of memory.
6032  */
6033     static dictitem_T *
6034 dictitem_alloc(key)
6035     char_u	*key;
6036 {
6037     dictitem_T *di;
6038 
6039     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6040     if (di != NULL)
6041     {
6042 	STRCPY(di->di_key, key);
6043 	di->di_flags = 0;
6044     }
6045     return di;
6046 }
6047 
6048 /*
6049  * Make a copy of a Dictionary item.
6050  */
6051     static dictitem_T *
6052 dictitem_copy(org)
6053     dictitem_T *org;
6054 {
6055     dictitem_T *di;
6056 
6057     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6058     if (di != NULL)
6059     {
6060 	STRCPY(di->di_key, org->di_key);
6061 	di->di_flags = 0;
6062 	copy_tv(&org->di_tv, &di->di_tv);
6063     }
6064     return di;
6065 }
6066 
6067 /*
6068  * Remove item "item" from Dictionary "dict" and free it.
6069  */
6070     static void
6071 dictitem_remove(dict, item)
6072     dict_T	*dict;
6073     dictitem_T	*item;
6074 {
6075     hashitem_T	*hi;
6076 
6077     hi = hash_find(&dict->dv_hashtab, item->di_key);
6078     if (HASHITEM_EMPTY(hi))
6079 	EMSG2(_(e_intern2), "dictitem_remove()");
6080     else
6081 	hash_remove(&dict->dv_hashtab, hi);
6082     dictitem_free(item);
6083 }
6084 
6085 /*
6086  * Free a dict item.  Also clears the value.
6087  */
6088     static void
6089 dictitem_free(item)
6090     dictitem_T *item;
6091 {
6092     clear_tv(&item->di_tv);
6093     vim_free(item);
6094 }
6095 
6096 /*
6097  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6098  * The refcount of the new dict is set to 1.
6099  * See item_copy() for "copyID".
6100  * Returns NULL when out of memory.
6101  */
6102     static dict_T *
6103 dict_copy(orig, deep, copyID)
6104     dict_T	*orig;
6105     int		deep;
6106     int		copyID;
6107 {
6108     dict_T	*copy;
6109     dictitem_T	*di;
6110     int		todo;
6111     hashitem_T	*hi;
6112 
6113     if (orig == NULL)
6114 	return NULL;
6115 
6116     copy = dict_alloc();
6117     if (copy != NULL)
6118     {
6119 	if (copyID != 0)
6120 	{
6121 	    orig->dv_copyID = copyID;
6122 	    orig->dv_copydict = copy;
6123 	}
6124 	todo = orig->dv_hashtab.ht_used;
6125 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6126 	{
6127 	    if (!HASHITEM_EMPTY(hi))
6128 	    {
6129 		--todo;
6130 
6131 		di = dictitem_alloc(hi->hi_key);
6132 		if (di == NULL)
6133 		    break;
6134 		if (deep)
6135 		{
6136 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6137 							      copyID) == FAIL)
6138 		    {
6139 			vim_free(di);
6140 			break;
6141 		    }
6142 		}
6143 		else
6144 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6145 		if (dict_add(copy, di) == FAIL)
6146 		{
6147 		    dictitem_free(di);
6148 		    break;
6149 		}
6150 	    }
6151 	}
6152 
6153 	++copy->dv_refcount;
6154 	if (todo > 0)
6155 	{
6156 	    dict_unref(copy);
6157 	    copy = NULL;
6158 	}
6159     }
6160 
6161     return copy;
6162 }
6163 
6164 /*
6165  * Add item "item" to Dictionary "d".
6166  * Returns FAIL when out of memory and when key already existed.
6167  */
6168     static int
6169 dict_add(d, item)
6170     dict_T	*d;
6171     dictitem_T	*item;
6172 {
6173     return hash_add(&d->dv_hashtab, item->di_key);
6174 }
6175 
6176 /*
6177  * Add a number or string entry to dictionary "d".
6178  * When "str" is NULL use number "nr", otherwise use "str".
6179  * Returns FAIL when out of memory and when key already exists.
6180  */
6181     int
6182 dict_add_nr_str(d, key, nr, str)
6183     dict_T	*d;
6184     char	*key;
6185     long	nr;
6186     char_u	*str;
6187 {
6188     dictitem_T	*item;
6189 
6190     item = dictitem_alloc((char_u *)key);
6191     if (item == NULL)
6192 	return FAIL;
6193     item->di_tv.v_lock = 0;
6194     if (str == NULL)
6195     {
6196 	item->di_tv.v_type = VAR_NUMBER;
6197 	item->di_tv.vval.v_number = nr;
6198     }
6199     else
6200     {
6201 	item->di_tv.v_type = VAR_STRING;
6202 	item->di_tv.vval.v_string = vim_strsave(str);
6203     }
6204     if (dict_add(d, item) == FAIL)
6205     {
6206 	dictitem_free(item);
6207 	return FAIL;
6208     }
6209     return OK;
6210 }
6211 
6212 /*
6213  * Get the number of items in a Dictionary.
6214  */
6215     static long
6216 dict_len(d)
6217     dict_T	*d;
6218 {
6219     if (d == NULL)
6220 	return 0L;
6221     return d->dv_hashtab.ht_used;
6222 }
6223 
6224 /*
6225  * Find item "key[len]" in Dictionary "d".
6226  * If "len" is negative use strlen(key).
6227  * Returns NULL when not found.
6228  */
6229     static dictitem_T *
6230 dict_find(d, key, len)
6231     dict_T	*d;
6232     char_u	*key;
6233     int		len;
6234 {
6235 #define AKEYLEN 200
6236     char_u	buf[AKEYLEN];
6237     char_u	*akey;
6238     char_u	*tofree = NULL;
6239     hashitem_T	*hi;
6240 
6241     if (len < 0)
6242 	akey = key;
6243     else if (len >= AKEYLEN)
6244     {
6245 	tofree = akey = vim_strnsave(key, len);
6246 	if (akey == NULL)
6247 	    return NULL;
6248     }
6249     else
6250     {
6251 	/* Avoid a malloc/free by using buf[]. */
6252 	vim_strncpy(buf, key, len);
6253 	akey = buf;
6254     }
6255 
6256     hi = hash_find(&d->dv_hashtab, akey);
6257     vim_free(tofree);
6258     if (HASHITEM_EMPTY(hi))
6259 	return NULL;
6260     return HI2DI(hi);
6261 }
6262 
6263 /*
6264  * Get a string item from a dictionary in allocated memory.
6265  * Returns NULL if the entry doesn't exist or out of memory.
6266  */
6267     char_u *
6268 get_dict_string(d, key)
6269     dict_T	*d;
6270     char_u	*key;
6271 {
6272     dictitem_T	*di;
6273 
6274     di = dict_find(d, key, -1);
6275     if (di == NULL)
6276 	return NULL;
6277     return vim_strsave(get_tv_string(&di->di_tv));
6278 }
6279 
6280 /*
6281  * Get a number item from a dictionary.
6282  * Returns 0 if the entry doesn't exist or out of memory.
6283  */
6284     long
6285 get_dict_number(d, key)
6286     dict_T	*d;
6287     char_u	*key;
6288 {
6289     dictitem_T	*di;
6290 
6291     di = dict_find(d, key, -1);
6292     if (di == NULL)
6293 	return 0;
6294     return get_tv_number(&di->di_tv);
6295 }
6296 
6297 /*
6298  * Return an allocated string with the string representation of a Dictionary.
6299  * May return NULL.
6300  */
6301     static char_u *
6302 dict2string(tv)
6303     typval_T	*tv;
6304 {
6305     garray_T	ga;
6306     int		first = TRUE;
6307     char_u	*tofree;
6308     char_u	numbuf[NUMBUFLEN];
6309     hashitem_T	*hi;
6310     char_u	*s;
6311     dict_T	*d;
6312     int		todo;
6313 
6314     if ((d = tv->vval.v_dict) == NULL)
6315 	return NULL;
6316     ga_init2(&ga, (int)sizeof(char), 80);
6317     ga_append(&ga, '{');
6318 
6319     todo = d->dv_hashtab.ht_used;
6320     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6321     {
6322 	if (!HASHITEM_EMPTY(hi))
6323 	{
6324 	    --todo;
6325 
6326 	    if (first)
6327 		first = FALSE;
6328 	    else
6329 		ga_concat(&ga, (char_u *)", ");
6330 
6331 	    tofree = string_quote(hi->hi_key, FALSE);
6332 	    if (tofree != NULL)
6333 	    {
6334 		ga_concat(&ga, tofree);
6335 		vim_free(tofree);
6336 	    }
6337 	    ga_concat(&ga, (char_u *)": ");
6338 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf);
6339 	    if (s != NULL)
6340 		ga_concat(&ga, s);
6341 	    vim_free(tofree);
6342 	    if (s == NULL)
6343 		break;
6344 	}
6345     }
6346     if (todo > 0)
6347     {
6348 	vim_free(ga.ga_data);
6349 	return NULL;
6350     }
6351 
6352     ga_append(&ga, '}');
6353     ga_append(&ga, NUL);
6354     return (char_u *)ga.ga_data;
6355 }
6356 
6357 /*
6358  * Allocate a variable for a Dictionary and fill it from "*arg".
6359  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6360  */
6361     static int
6362 get_dict_tv(arg, rettv, evaluate)
6363     char_u	**arg;
6364     typval_T	*rettv;
6365     int		evaluate;
6366 {
6367     dict_T	*d = NULL;
6368     typval_T	tvkey;
6369     typval_T	tv;
6370     char_u	*key;
6371     dictitem_T	*item;
6372     char_u	*start = skipwhite(*arg + 1);
6373     char_u	buf[NUMBUFLEN];
6374 
6375     /*
6376      * First check if it's not a curly-braces thing: {expr}.
6377      * Must do this without evaluating, otherwise a function may be called
6378      * twice.  Unfortunately this means we need to call eval1() twice for the
6379      * first item.
6380      * But {} is an empty Dictionary.
6381      */
6382     if (*start != '}')
6383     {
6384 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6385 	    return FAIL;
6386 	if (*start == '}')
6387 	    return NOTDONE;
6388     }
6389 
6390     if (evaluate)
6391     {
6392 	d = dict_alloc();
6393 	if (d == NULL)
6394 	    return FAIL;
6395     }
6396     tvkey.v_type = VAR_UNKNOWN;
6397     tv.v_type = VAR_UNKNOWN;
6398 
6399     *arg = skipwhite(*arg + 1);
6400     while (**arg != '}' && **arg != NUL)
6401     {
6402 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6403 	    goto failret;
6404 	if (**arg != ':')
6405 	{
6406 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6407 	    clear_tv(&tvkey);
6408 	    goto failret;
6409 	}
6410 	key = get_tv_string_buf_chk(&tvkey, buf);
6411 	if (key == NULL || *key == NUL)
6412 	{
6413 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6414 	    if (key != NULL)
6415 		EMSG(_(e_emptykey));
6416 	    clear_tv(&tvkey);
6417 	    goto failret;
6418 	}
6419 
6420 	*arg = skipwhite(*arg + 1);
6421 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6422 	{
6423 	    clear_tv(&tvkey);
6424 	    goto failret;
6425 	}
6426 	if (evaluate)
6427 	{
6428 	    item = dict_find(d, key, -1);
6429 	    if (item != NULL)
6430 	    {
6431 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6432 		clear_tv(&tvkey);
6433 		clear_tv(&tv);
6434 		goto failret;
6435 	    }
6436 	    item = dictitem_alloc(key);
6437 	    clear_tv(&tvkey);
6438 	    if (item != NULL)
6439 	    {
6440 		item->di_tv = tv;
6441 		item->di_tv.v_lock = 0;
6442 		if (dict_add(d, item) == FAIL)
6443 		    dictitem_free(item);
6444 	    }
6445 	}
6446 
6447 	if (**arg == '}')
6448 	    break;
6449 	if (**arg != ',')
6450 	{
6451 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6452 	    goto failret;
6453 	}
6454 	*arg = skipwhite(*arg + 1);
6455     }
6456 
6457     if (**arg != '}')
6458     {
6459 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6460 failret:
6461 	if (evaluate)
6462 	    dict_free(d);
6463 	return FAIL;
6464     }
6465 
6466     *arg = skipwhite(*arg + 1);
6467     if (evaluate)
6468     {
6469 	rettv->v_type = VAR_DICT;
6470 	rettv->vval.v_dict = d;
6471 	++d->dv_refcount;
6472     }
6473 
6474     return OK;
6475 }
6476 
6477 /*
6478  * Return a string with the string representation of a variable.
6479  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6480  * "numbuf" is used for a number.
6481  * Does not put quotes around strings, as ":echo" displays values.
6482  * May return NULL;
6483  */
6484     static char_u *
6485 echo_string(tv, tofree, numbuf)
6486     typval_T	*tv;
6487     char_u	**tofree;
6488     char_u	*numbuf;
6489 {
6490     static int	recurse = 0;
6491     char_u	*r = NULL;
6492 
6493     if (recurse >= DICT_MAXNEST)
6494     {
6495 	EMSG(_("E724: variable nested too deep for displaying"));
6496 	*tofree = NULL;
6497 	return NULL;
6498     }
6499     ++recurse;
6500 
6501     switch (tv->v_type)
6502     {
6503 	case VAR_FUNC:
6504 	    *tofree = NULL;
6505 	    r = tv->vval.v_string;
6506 	    break;
6507 	case VAR_LIST:
6508 	    *tofree = list2string(tv);
6509 	    r = *tofree;
6510 	    break;
6511 	case VAR_DICT:
6512 	    *tofree = dict2string(tv);
6513 	    r = *tofree;
6514 	    break;
6515 	case VAR_STRING:
6516 	case VAR_NUMBER:
6517 	    *tofree = NULL;
6518 	    r = get_tv_string_buf(tv, numbuf);
6519 	    break;
6520 	default:
6521 	    EMSG2(_(e_intern2), "echo_string()");
6522 	    *tofree = NULL;
6523     }
6524 
6525     --recurse;
6526     return r;
6527 }
6528 
6529 /*
6530  * Return a string with the string representation of a variable.
6531  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6532  * "numbuf" is used for a number.
6533  * Puts quotes around strings, so that they can be parsed back by eval().
6534  * May return NULL;
6535  */
6536     static char_u *
6537 tv2string(tv, tofree, numbuf)
6538     typval_T	*tv;
6539     char_u	**tofree;
6540     char_u	*numbuf;
6541 {
6542     switch (tv->v_type)
6543     {
6544 	case VAR_FUNC:
6545 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6546 	    return *tofree;
6547 	case VAR_STRING:
6548 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6549 	    return *tofree;
6550 	case VAR_NUMBER:
6551 	case VAR_LIST:
6552 	case VAR_DICT:
6553 	    break;
6554 	default:
6555 	    EMSG2(_(e_intern2), "tv2string()");
6556     }
6557     return echo_string(tv, tofree, numbuf);
6558 }
6559 
6560 /*
6561  * Return string "str" in ' quotes, doubling ' characters.
6562  * If "str" is NULL an empty string is assumed.
6563  * If "function" is TRUE make it function('string').
6564  */
6565     static char_u *
6566 string_quote(str, function)
6567     char_u	*str;
6568     int		function;
6569 {
6570     unsigned	len;
6571     char_u	*p, *r, *s;
6572 
6573     len = (function ? 13 : 3);
6574     if (str != NULL)
6575     {
6576 	len += STRLEN(str);
6577 	for (p = str; *p != NUL; mb_ptr_adv(p))
6578 	    if (*p == '\'')
6579 		++len;
6580     }
6581     s = r = alloc(len);
6582     if (r != NULL)
6583     {
6584 	if (function)
6585 	{
6586 	    STRCPY(r, "function('");
6587 	    r += 10;
6588 	}
6589 	else
6590 	    *r++ = '\'';
6591 	if (str != NULL)
6592 	    for (p = str; *p != NUL; )
6593 	    {
6594 		if (*p == '\'')
6595 		    *r++ = '\'';
6596 		MB_COPY_CHAR(p, r);
6597 	    }
6598 	*r++ = '\'';
6599 	if (function)
6600 	    *r++ = ')';
6601 	*r++ = NUL;
6602     }
6603     return s;
6604 }
6605 
6606 /*
6607  * Get the value of an environment variable.
6608  * "arg" is pointing to the '$'.  It is advanced to after the name.
6609  * If the environment variable was not set, silently assume it is empty.
6610  * Always return OK.
6611  */
6612     static int
6613 get_env_tv(arg, rettv, evaluate)
6614     char_u	**arg;
6615     typval_T	*rettv;
6616     int		evaluate;
6617 {
6618     char_u	*string = NULL;
6619     int		len;
6620     int		cc;
6621     char_u	*name;
6622     int		mustfree = FALSE;
6623 
6624     ++*arg;
6625     name = *arg;
6626     len = get_env_len(arg);
6627     if (evaluate)
6628     {
6629 	if (len != 0)
6630 	{
6631 	    cc = name[len];
6632 	    name[len] = NUL;
6633 	    /* first try vim_getenv(), fast for normal environment vars */
6634 	    string = vim_getenv(name, &mustfree);
6635 	    if (string != NULL && *string != NUL)
6636 	    {
6637 		if (!mustfree)
6638 		    string = vim_strsave(string);
6639 	    }
6640 	    else
6641 	    {
6642 		if (mustfree)
6643 		    vim_free(string);
6644 
6645 		/* next try expanding things like $VIM and ${HOME} */
6646 		string = expand_env_save(name - 1);
6647 		if (string != NULL && *string == '$')
6648 		{
6649 		    vim_free(string);
6650 		    string = NULL;
6651 		}
6652 	    }
6653 	    name[len] = cc;
6654 	}
6655 	rettv->v_type = VAR_STRING;
6656 	rettv->vval.v_string = string;
6657     }
6658 
6659     return OK;
6660 }
6661 
6662 /*
6663  * Array with names and number of arguments of all internal functions
6664  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6665  */
6666 static struct fst
6667 {
6668     char	*f_name;	/* function name */
6669     char	f_min_argc;	/* minimal number of arguments */
6670     char	f_max_argc;	/* maximal number of arguments */
6671     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6672 				/* implemenation of function */
6673 } functions[] =
6674 {
6675     {"add",		2, 2, f_add},
6676     {"append",		2, 2, f_append},
6677     {"argc",		0, 0, f_argc},
6678     {"argidx",		0, 0, f_argidx},
6679     {"argv",		1, 1, f_argv},
6680     {"browse",		4, 4, f_browse},
6681     {"browsedir",	2, 2, f_browsedir},
6682     {"bufexists",	1, 1, f_bufexists},
6683     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6684     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6685     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6686     {"buflisted",	1, 1, f_buflisted},
6687     {"bufloaded",	1, 1, f_bufloaded},
6688     {"bufname",		1, 1, f_bufname},
6689     {"bufnr",		1, 1, f_bufnr},
6690     {"bufwinnr",	1, 1, f_bufwinnr},
6691     {"byte2line",	1, 1, f_byte2line},
6692     {"byteidx",		2, 2, f_byteidx},
6693     {"call",		2, 3, f_call},
6694     {"char2nr",		1, 1, f_char2nr},
6695     {"cindent",		1, 1, f_cindent},
6696     {"col",		1, 1, f_col},
6697 #if defined(FEAT_INS_EXPAND)
6698     {"complete_add",	1, 1, f_complete_add},
6699     {"complete_check",	0, 0, f_complete_check},
6700 #endif
6701     {"confirm",		1, 4, f_confirm},
6702     {"copy",		1, 1, f_copy},
6703     {"count",		2, 4, f_count},
6704     {"cscope_connection",0,3, f_cscope_connection},
6705     {"cursor",		2, 2, f_cursor},
6706     {"deepcopy",	1, 2, f_deepcopy},
6707     {"delete",		1, 1, f_delete},
6708     {"did_filetype",	0, 0, f_did_filetype},
6709     {"diff_filler",	1, 1, f_diff_filler},
6710     {"diff_hlID",	2, 2, f_diff_hlID},
6711     {"empty",		1, 1, f_empty},
6712     {"escape",		2, 2, f_escape},
6713     {"eval",		1, 1, f_eval},
6714     {"eventhandler",	0, 0, f_eventhandler},
6715     {"executable",	1, 1, f_executable},
6716     {"exists",		1, 1, f_exists},
6717     {"expand",		1, 2, f_expand},
6718     {"extend",		2, 3, f_extend},
6719     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6720     {"filereadable",	1, 1, f_filereadable},
6721     {"filewritable",	1, 1, f_filewritable},
6722     {"filter",		2, 2, f_filter},
6723     {"finddir",		1, 3, f_finddir},
6724     {"findfile",	1, 3, f_findfile},
6725     {"fnamemodify",	2, 2, f_fnamemodify},
6726     {"foldclosed",	1, 1, f_foldclosed},
6727     {"foldclosedend",	1, 1, f_foldclosedend},
6728     {"foldlevel",	1, 1, f_foldlevel},
6729     {"foldtext",	0, 0, f_foldtext},
6730     {"foldtextresult",	1, 1, f_foldtextresult},
6731     {"foreground",	0, 0, f_foreground},
6732     {"function",	1, 1, f_function},
6733     {"garbagecollect",	0, 0, f_garbagecollect},
6734     {"get",		2, 3, f_get},
6735     {"getbufline",	2, 3, f_getbufline},
6736     {"getbufvar",	2, 2, f_getbufvar},
6737     {"getchar",		0, 1, f_getchar},
6738     {"getcharmod",	0, 0, f_getcharmod},
6739     {"getcmdline",	0, 0, f_getcmdline},
6740     {"getcmdpos",	0, 0, f_getcmdpos},
6741     {"getcwd",		0, 0, f_getcwd},
6742     {"getfontname",	0, 1, f_getfontname},
6743     {"getfperm",	1, 1, f_getfperm},
6744     {"getfsize",	1, 1, f_getfsize},
6745     {"getftime",	1, 1, f_getftime},
6746     {"getftype",	1, 1, f_getftype},
6747     {"getline",		1, 2, f_getline},
6748     {"getqflist",	0, 0, f_getqflist},
6749     {"getreg",		0, 2, f_getreg},
6750     {"getregtype",	0, 1, f_getregtype},
6751     {"getwinposx",	0, 0, f_getwinposx},
6752     {"getwinposy",	0, 0, f_getwinposy},
6753     {"getwinvar",	2, 2, f_getwinvar},
6754     {"glob",		1, 1, f_glob},
6755     {"globpath",	2, 2, f_globpath},
6756     {"has",		1, 1, f_has},
6757     {"has_key",		2, 2, f_has_key},
6758     {"hasmapto",	1, 2, f_hasmapto},
6759     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6760     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6761     {"histadd",		2, 2, f_histadd},
6762     {"histdel",		1, 2, f_histdel},
6763     {"histget",		1, 2, f_histget},
6764     {"histnr",		1, 1, f_histnr},
6765     {"hlID",		1, 1, f_hlID},
6766     {"hlexists",	1, 1, f_hlexists},
6767     {"hostname",	0, 0, f_hostname},
6768     {"iconv",		3, 3, f_iconv},
6769     {"indent",		1, 1, f_indent},
6770     {"index",		2, 4, f_index},
6771     {"input",		1, 2, f_input},
6772     {"inputdialog",	1, 3, f_inputdialog},
6773     {"inputrestore",	0, 0, f_inputrestore},
6774     {"inputsave",	0, 0, f_inputsave},
6775     {"inputsecret",	1, 2, f_inputsecret},
6776     {"insert",		2, 3, f_insert},
6777     {"isdirectory",	1, 1, f_isdirectory},
6778     {"islocked",	1, 1, f_islocked},
6779     {"items",		1, 1, f_items},
6780     {"join",		1, 2, f_join},
6781     {"keys",		1, 1, f_keys},
6782     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6783     {"len",		1, 1, f_len},
6784     {"libcall",		3, 3, f_libcall},
6785     {"libcallnr",	3, 3, f_libcallnr},
6786     {"line",		1, 1, f_line},
6787     {"line2byte",	1, 1, f_line2byte},
6788     {"lispindent",	1, 1, f_lispindent},
6789     {"localtime",	0, 0, f_localtime},
6790     {"map",		2, 2, f_map},
6791     {"maparg",		1, 2, f_maparg},
6792     {"mapcheck",	1, 2, f_mapcheck},
6793     {"match",		2, 4, f_match},
6794     {"matchend",	2, 4, f_matchend},
6795     {"matchlist",	2, 4, f_matchlist},
6796     {"matchstr",	2, 4, f_matchstr},
6797     {"max",		1, 1, f_max},
6798     {"min",		1, 1, f_min},
6799 #ifdef vim_mkdir
6800     {"mkdir",		1, 3, f_mkdir},
6801 #endif
6802     {"mode",		0, 0, f_mode},
6803     {"nextnonblank",	1, 1, f_nextnonblank},
6804     {"nr2char",		1, 1, f_nr2char},
6805     {"prevnonblank",	1, 1, f_prevnonblank},
6806     {"printf",		2, 19, f_printf},
6807     {"range",		1, 3, f_range},
6808     {"readfile",	1, 3, f_readfile},
6809     {"remote_expr",	2, 3, f_remote_expr},
6810     {"remote_foreground", 1, 1, f_remote_foreground},
6811     {"remote_peek",	1, 2, f_remote_peek},
6812     {"remote_read",	1, 1, f_remote_read},
6813     {"remote_send",	2, 3, f_remote_send},
6814     {"remove",		2, 3, f_remove},
6815     {"rename",		2, 2, f_rename},
6816     {"repeat",		2, 2, f_repeat},
6817     {"resolve",		1, 1, f_resolve},
6818     {"reverse",		1, 1, f_reverse},
6819     {"search",		1, 2, f_search},
6820     {"searchpair",	3, 5, f_searchpair},
6821     {"server2client",	2, 2, f_server2client},
6822     {"serverlist",	0, 0, f_serverlist},
6823     {"setbufvar",	3, 3, f_setbufvar},
6824     {"setcmdpos",	1, 1, f_setcmdpos},
6825     {"setline",		2, 2, f_setline},
6826     {"setqflist",	1, 2, f_setqflist},
6827     {"setreg",		2, 3, f_setreg},
6828     {"setwinvar",	3, 3, f_setwinvar},
6829     {"simplify",	1, 1, f_simplify},
6830     {"sort",		1, 2, f_sort},
6831     {"soundfold",	1, 1, f_soundfold},
6832     {"spellbadword",	0, 0, f_spellbadword},
6833     {"spellsuggest",	1, 2, f_spellsuggest},
6834     {"split",		1, 3, f_split},
6835 #ifdef HAVE_STRFTIME
6836     {"strftime",	1, 2, f_strftime},
6837 #endif
6838     {"stridx",		2, 3, f_stridx},
6839     {"string",		1, 1, f_string},
6840     {"strlen",		1, 1, f_strlen},
6841     {"strpart",		2, 3, f_strpart},
6842     {"strridx",		2, 3, f_strridx},
6843     {"strtrans",	1, 1, f_strtrans},
6844     {"submatch",	1, 1, f_submatch},
6845     {"substitute",	4, 4, f_substitute},
6846     {"synID",		3, 3, f_synID},
6847     {"synIDattr",	2, 3, f_synIDattr},
6848     {"synIDtrans",	1, 1, f_synIDtrans},
6849     {"system",		1, 2, f_system},
6850     {"taglist",		1, 1, f_taglist},
6851     {"tempname",	0, 0, f_tempname},
6852     {"tolower",		1, 1, f_tolower},
6853     {"toupper",		1, 1, f_toupper},
6854     {"tr",		3, 3, f_tr},
6855     {"type",		1, 1, f_type},
6856     {"values",		1, 1, f_values},
6857     {"virtcol",		1, 1, f_virtcol},
6858     {"visualmode",	0, 1, f_visualmode},
6859     {"winbufnr",	1, 1, f_winbufnr},
6860     {"wincol",		0, 0, f_wincol},
6861     {"winheight",	1, 1, f_winheight},
6862     {"winline",		0, 0, f_winline},
6863     {"winnr",		0, 1, f_winnr},
6864     {"winrestcmd",	0, 0, f_winrestcmd},
6865     {"winwidth",	1, 1, f_winwidth},
6866     {"writefile",	2, 3, f_writefile},
6867 };
6868 
6869 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
6870 
6871 /*
6872  * Function given to ExpandGeneric() to obtain the list of internal
6873  * or user defined function names.
6874  */
6875     char_u *
6876 get_function_name(xp, idx)
6877     expand_T	*xp;
6878     int		idx;
6879 {
6880     static int	intidx = -1;
6881     char_u	*name;
6882 
6883     if (idx == 0)
6884 	intidx = -1;
6885     if (intidx < 0)
6886     {
6887 	name = get_user_func_name(xp, idx);
6888 	if (name != NULL)
6889 	    return name;
6890     }
6891     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
6892     {
6893 	STRCPY(IObuff, functions[intidx].f_name);
6894 	STRCAT(IObuff, "(");
6895 	if (functions[intidx].f_max_argc == 0)
6896 	    STRCAT(IObuff, ")");
6897 	return IObuff;
6898     }
6899 
6900     return NULL;
6901 }
6902 
6903 /*
6904  * Function given to ExpandGeneric() to obtain the list of internal or
6905  * user defined variable or function names.
6906  */
6907 /*ARGSUSED*/
6908     char_u *
6909 get_expr_name(xp, idx)
6910     expand_T	*xp;
6911     int		idx;
6912 {
6913     static int	intidx = -1;
6914     char_u	*name;
6915 
6916     if (idx == 0)
6917 	intidx = -1;
6918     if (intidx < 0)
6919     {
6920 	name = get_function_name(xp, idx);
6921 	if (name != NULL)
6922 	    return name;
6923     }
6924     return get_user_var_name(xp, ++intidx);
6925 }
6926 
6927 #endif /* FEAT_CMDL_COMPL */
6928 
6929 /*
6930  * Find internal function in table above.
6931  * Return index, or -1 if not found
6932  */
6933     static int
6934 find_internal_func(name)
6935     char_u	*name;		/* name of the function */
6936 {
6937     int		first = 0;
6938     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
6939     int		cmp;
6940     int		x;
6941 
6942     /*
6943      * Find the function name in the table. Binary search.
6944      */
6945     while (first <= last)
6946     {
6947 	x = first + ((unsigned)(last - first) >> 1);
6948 	cmp = STRCMP(name, functions[x].f_name);
6949 	if (cmp < 0)
6950 	    last = x - 1;
6951 	else if (cmp > 0)
6952 	    first = x + 1;
6953 	else
6954 	    return x;
6955     }
6956     return -1;
6957 }
6958 
6959 /*
6960  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
6961  * name it contains, otherwise return "name".
6962  */
6963     static char_u *
6964 deref_func_name(name, lenp)
6965     char_u	*name;
6966     int		*lenp;
6967 {
6968     dictitem_T	*v;
6969     int		cc;
6970 
6971     cc = name[*lenp];
6972     name[*lenp] = NUL;
6973     v = find_var(name, NULL);
6974     name[*lenp] = cc;
6975     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
6976     {
6977 	if (v->di_tv.vval.v_string == NULL)
6978 	{
6979 	    *lenp = 0;
6980 	    return (char_u *)"";	/* just in case */
6981 	}
6982 	*lenp = STRLEN(v->di_tv.vval.v_string);
6983 	return v->di_tv.vval.v_string;
6984     }
6985 
6986     return name;
6987 }
6988 
6989 /*
6990  * Allocate a variable for the result of a function.
6991  * Return OK or FAIL.
6992  */
6993     static int
6994 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
6995 							   evaluate, selfdict)
6996     char_u	*name;		/* name of the function */
6997     int		len;		/* length of "name" */
6998     typval_T	*rettv;
6999     char_u	**arg;		/* argument, pointing to the '(' */
7000     linenr_T	firstline;	/* first line of range */
7001     linenr_T	lastline;	/* last line of range */
7002     int		*doesrange;	/* return: function handled range */
7003     int		evaluate;
7004     dict_T	*selfdict;	/* Dictionary for "self" */
7005 {
7006     char_u	*argp;
7007     int		ret = OK;
7008     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7009     int		argcount = 0;		/* number of arguments found */
7010 
7011     /*
7012      * Get the arguments.
7013      */
7014     argp = *arg;
7015     while (argcount < MAX_FUNC_ARGS)
7016     {
7017 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7018 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7019 	    break;
7020 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7021 	{
7022 	    ret = FAIL;
7023 	    break;
7024 	}
7025 	++argcount;
7026 	if (*argp != ',')
7027 	    break;
7028     }
7029     if (*argp == ')')
7030 	++argp;
7031     else
7032 	ret = FAIL;
7033 
7034     if (ret == OK)
7035 	ret = call_func(name, len, rettv, argcount, argvars,
7036 			  firstline, lastline, doesrange, evaluate, selfdict);
7037     else if (!aborting())
7038     {
7039 	if (argcount == MAX_FUNC_ARGS)
7040 	    emsg_funcname("E740: Too many arguments for function %s", name);
7041 	else
7042 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7043     }
7044 
7045     while (--argcount >= 0)
7046 	clear_tv(&argvars[argcount]);
7047 
7048     *arg = skipwhite(argp);
7049     return ret;
7050 }
7051 
7052 
7053 /*
7054  * Call a function with its resolved parameters
7055  * Return OK or FAIL.
7056  */
7057     static int
7058 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7059 						doesrange, evaluate, selfdict)
7060     char_u	*name;		/* name of the function */
7061     int		len;		/* length of "name" */
7062     typval_T	*rettv;		/* return value goes here */
7063     int		argcount;	/* number of "argvars" */
7064     typval_T	*argvars;	/* vars for arguments */
7065     linenr_T	firstline;	/* first line of range */
7066     linenr_T	lastline;	/* last line of range */
7067     int		*doesrange;	/* return: function handled range */
7068     int		evaluate;
7069     dict_T	*selfdict;	/* Dictionary for "self" */
7070 {
7071     int		ret = FAIL;
7072 #define ERROR_UNKNOWN	0
7073 #define ERROR_TOOMANY	1
7074 #define ERROR_TOOFEW	2
7075 #define ERROR_SCRIPT	3
7076 #define ERROR_DICT	4
7077 #define ERROR_NONE	5
7078 #define ERROR_OTHER	6
7079     int		error = ERROR_NONE;
7080     int		i;
7081     int		llen;
7082     ufunc_T	*fp;
7083     int		cc;
7084 #define FLEN_FIXED 40
7085     char_u	fname_buf[FLEN_FIXED + 1];
7086     char_u	*fname;
7087 
7088     /*
7089      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7090      * Change <SNR>123_name() to K_SNR 123_name().
7091      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7092      */
7093     cc = name[len];
7094     name[len] = NUL;
7095     llen = eval_fname_script(name);
7096     if (llen > 0)
7097     {
7098 	fname_buf[0] = K_SPECIAL;
7099 	fname_buf[1] = KS_EXTRA;
7100 	fname_buf[2] = (int)KE_SNR;
7101 	i = 3;
7102 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7103 	{
7104 	    if (current_SID <= 0)
7105 		error = ERROR_SCRIPT;
7106 	    else
7107 	    {
7108 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7109 		i = (int)STRLEN(fname_buf);
7110 	    }
7111 	}
7112 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7113 	{
7114 	    STRCPY(fname_buf + i, name + llen);
7115 	    fname = fname_buf;
7116 	}
7117 	else
7118 	{
7119 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7120 	    if (fname == NULL)
7121 		error = ERROR_OTHER;
7122 	    else
7123 	    {
7124 		mch_memmove(fname, fname_buf, (size_t)i);
7125 		STRCPY(fname + i, name + llen);
7126 	    }
7127 	}
7128     }
7129     else
7130 	fname = name;
7131 
7132     *doesrange = FALSE;
7133 
7134 
7135     /* execute the function if no errors detected and executing */
7136     if (evaluate && error == ERROR_NONE)
7137     {
7138 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7139 	error = ERROR_UNKNOWN;
7140 
7141 	if (!builtin_function(fname))
7142 	{
7143 	    /*
7144 	     * User defined function.
7145 	     */
7146 	    fp = find_func(fname);
7147 
7148 #ifdef FEAT_AUTOCMD
7149 	    /* Trigger FuncUndefined event, may load the function. */
7150 	    if (fp == NULL
7151 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7152 						     fname, fname, TRUE, NULL)
7153 		    && !aborting())
7154 	    {
7155 		/* executed an autocommand, search for the function again */
7156 		fp = find_func(fname);
7157 	    }
7158 #endif
7159 	    /* Try loading a package. */
7160 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7161 	    {
7162 		/* loaded a package, search for the function again */
7163 		fp = find_func(fname);
7164 	    }
7165 
7166 	    if (fp != NULL)
7167 	    {
7168 		if (fp->uf_flags & FC_RANGE)
7169 		    *doesrange = TRUE;
7170 		if (argcount < fp->uf_args.ga_len)
7171 		    error = ERROR_TOOFEW;
7172 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7173 		    error = ERROR_TOOMANY;
7174 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7175 		    error = ERROR_DICT;
7176 		else
7177 		{
7178 		    /*
7179 		     * Call the user function.
7180 		     * Save and restore search patterns, script variables and
7181 		     * redo buffer.
7182 		     */
7183 		    save_search_patterns();
7184 		    saveRedobuff();
7185 		    ++fp->uf_calls;
7186 		    call_user_func(fp, argcount, argvars, rettv,
7187 					       firstline, lastline,
7188 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7189 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7190 						      && fp->uf_refcount <= 0)
7191 			/* Function was unreferenced while being used, free it
7192 			 * now. */
7193 			func_free(fp);
7194 		    restoreRedobuff();
7195 		    restore_search_patterns();
7196 		    error = ERROR_NONE;
7197 		}
7198 	    }
7199 	}
7200 	else
7201 	{
7202 	    /*
7203 	     * Find the function name in the table, call its implementation.
7204 	     */
7205 	    i = find_internal_func(fname);
7206 	    if (i >= 0)
7207 	    {
7208 		if (argcount < functions[i].f_min_argc)
7209 		    error = ERROR_TOOFEW;
7210 		else if (argcount > functions[i].f_max_argc)
7211 		    error = ERROR_TOOMANY;
7212 		else
7213 		{
7214 		    argvars[argcount].v_type = VAR_UNKNOWN;
7215 		    functions[i].f_func(argvars, rettv);
7216 		    error = ERROR_NONE;
7217 		}
7218 	    }
7219 	}
7220 	/*
7221 	 * The function call (or "FuncUndefined" autocommand sequence) might
7222 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7223 	 * exception that has not been caught so far.  This situation can be
7224 	 * tested for by calling aborting().  For an error in an internal
7225 	 * function or for the "E132" error in call_user_func(), however, the
7226 	 * throw point at which the "force_abort" flag (temporarily reset by
7227 	 * emsg()) is normally updated has not been reached yet. We need to
7228 	 * update that flag first to make aborting() reliable.
7229 	 */
7230 	update_force_abort();
7231     }
7232     if (error == ERROR_NONE)
7233 	ret = OK;
7234 
7235     /*
7236      * Report an error unless the argument evaluation or function call has been
7237      * cancelled due to an aborting error, an interrupt, or an exception.
7238      */
7239     if (!aborting())
7240     {
7241 	switch (error)
7242 	{
7243 	    case ERROR_UNKNOWN:
7244 		    emsg_funcname("E117: Unknown function: %s", name);
7245 		    break;
7246 	    case ERROR_TOOMANY:
7247 		    emsg_funcname(e_toomanyarg, name);
7248 		    break;
7249 	    case ERROR_TOOFEW:
7250 		    emsg_funcname("E119: Not enough arguments for function: %s",
7251 									name);
7252 		    break;
7253 	    case ERROR_SCRIPT:
7254 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7255 									name);
7256 		    break;
7257 	    case ERROR_DICT:
7258 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7259 									name);
7260 		    break;
7261 	}
7262     }
7263 
7264     name[len] = cc;
7265     if (fname != name && fname != fname_buf)
7266 	vim_free(fname);
7267 
7268     return ret;
7269 }
7270 
7271 /*
7272  * Give an error message with a function name.  Handle <SNR> things.
7273  */
7274     static void
7275 emsg_funcname(msg, name)
7276     char	*msg;
7277     char_u	*name;
7278 {
7279     char_u	*p;
7280 
7281     if (*name == K_SPECIAL)
7282 	p = concat_str((char_u *)"<SNR>", name + 3);
7283     else
7284 	p = name;
7285     EMSG2(_(msg), p);
7286     if (p != name)
7287 	vim_free(p);
7288 }
7289 
7290 /*********************************************
7291  * Implementation of the built-in functions
7292  */
7293 
7294 /*
7295  * "add(list, item)" function
7296  */
7297     static void
7298 f_add(argvars, rettv)
7299     typval_T	*argvars;
7300     typval_T	*rettv;
7301 {
7302     list_T	*l;
7303 
7304     rettv->vval.v_number = 1; /* Default: Failed */
7305     if (argvars[0].v_type == VAR_LIST)
7306     {
7307 	if ((l = argvars[0].vval.v_list) != NULL
7308 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7309 		&& list_append_tv(l, &argvars[1]) == OK)
7310 	    copy_tv(&argvars[0], rettv);
7311     }
7312     else
7313 	EMSG(_(e_listreq));
7314 }
7315 
7316 /*
7317  * "append(lnum, string/list)" function
7318  */
7319     static void
7320 f_append(argvars, rettv)
7321     typval_T	*argvars;
7322     typval_T	*rettv;
7323 {
7324     long	lnum;
7325     char_u	*line;
7326     list_T	*l = NULL;
7327     listitem_T	*li = NULL;
7328     typval_T	*tv;
7329     long	added = 0;
7330 
7331     lnum = get_tv_lnum(argvars);
7332     if (lnum >= 0
7333 	    && lnum <= curbuf->b_ml.ml_line_count
7334 	    && u_save(lnum, lnum + 1) == OK)
7335     {
7336 	if (argvars[1].v_type == VAR_LIST)
7337 	{
7338 	    l = argvars[1].vval.v_list;
7339 	    if (l == NULL)
7340 		return;
7341 	    li = l->lv_first;
7342 	}
7343 	rettv->vval.v_number = 0;	/* Default: Success */
7344 	for (;;)
7345 	{
7346 	    if (l == NULL)
7347 		tv = &argvars[1];	/* append a string */
7348 	    else if (li == NULL)
7349 		break;			/* end of list */
7350 	    else
7351 		tv = &li->li_tv;	/* append item from list */
7352 	    line = get_tv_string_chk(tv);
7353 	    if (line == NULL)		/* type error */
7354 	    {
7355 		rettv->vval.v_number = 1;	/* Failed */
7356 		break;
7357 	    }
7358 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7359 	    ++added;
7360 	    if (l == NULL)
7361 		break;
7362 	    li = li->li_next;
7363 	}
7364 
7365 	appended_lines_mark(lnum, added);
7366 	if (curwin->w_cursor.lnum > lnum)
7367 	    curwin->w_cursor.lnum += added;
7368     }
7369     else
7370 	rettv->vval.v_number = 1;	/* Failed */
7371 }
7372 
7373 /*
7374  * "argc()" function
7375  */
7376 /* ARGSUSED */
7377     static void
7378 f_argc(argvars, rettv)
7379     typval_T	*argvars;
7380     typval_T	*rettv;
7381 {
7382     rettv->vval.v_number = ARGCOUNT;
7383 }
7384 
7385 /*
7386  * "argidx()" function
7387  */
7388 /* ARGSUSED */
7389     static void
7390 f_argidx(argvars, rettv)
7391     typval_T	*argvars;
7392     typval_T	*rettv;
7393 {
7394     rettv->vval.v_number = curwin->w_arg_idx;
7395 }
7396 
7397 /*
7398  * "argv(nr)" function
7399  */
7400     static void
7401 f_argv(argvars, rettv)
7402     typval_T	*argvars;
7403     typval_T	*rettv;
7404 {
7405     int		idx;
7406 
7407     idx = get_tv_number_chk(&argvars[0], NULL);
7408     if (idx >= 0 && idx < ARGCOUNT)
7409 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7410     else
7411 	rettv->vval.v_string = NULL;
7412     rettv->v_type = VAR_STRING;
7413 }
7414 
7415 /*
7416  * "browse(save, title, initdir, default)" function
7417  */
7418 /* ARGSUSED */
7419     static void
7420 f_browse(argvars, rettv)
7421     typval_T	*argvars;
7422     typval_T	*rettv;
7423 {
7424 #ifdef FEAT_BROWSE
7425     int		save;
7426     char_u	*title;
7427     char_u	*initdir;
7428     char_u	*defname;
7429     char_u	buf[NUMBUFLEN];
7430     char_u	buf2[NUMBUFLEN];
7431     int		error = FALSE;
7432 
7433     save = get_tv_number_chk(&argvars[0], &error);
7434     title = get_tv_string_chk(&argvars[1]);
7435     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7436     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7437 
7438     if (error || title == NULL || initdir == NULL || defname == NULL)
7439 	rettv->vval.v_string = NULL;
7440     else
7441 	rettv->vval.v_string =
7442 		 do_browse(save ? BROWSE_SAVE : 0,
7443 				 title, defname, NULL, initdir, NULL, curbuf);
7444 #else
7445     rettv->vval.v_string = NULL;
7446 #endif
7447     rettv->v_type = VAR_STRING;
7448 }
7449 
7450 /*
7451  * "browsedir(title, initdir)" function
7452  */
7453 /* ARGSUSED */
7454     static void
7455 f_browsedir(argvars, rettv)
7456     typval_T	*argvars;
7457     typval_T	*rettv;
7458 {
7459 #ifdef FEAT_BROWSE
7460     char_u	*title;
7461     char_u	*initdir;
7462     char_u	buf[NUMBUFLEN];
7463 
7464     title = get_tv_string_chk(&argvars[0]);
7465     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7466 
7467     if (title == NULL || initdir == NULL)
7468 	rettv->vval.v_string = NULL;
7469     else
7470 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7471 				    title, NULL, NULL, initdir, NULL, curbuf);
7472 #else
7473     rettv->vval.v_string = NULL;
7474 #endif
7475     rettv->v_type = VAR_STRING;
7476 }
7477 
7478 static buf_T *find_buffer __ARGS((typval_T *avar));
7479 
7480 /*
7481  * Find a buffer by number or exact name.
7482  */
7483     static buf_T *
7484 find_buffer(avar)
7485     typval_T	*avar;
7486 {
7487     buf_T	*buf = NULL;
7488 
7489     if (avar->v_type == VAR_NUMBER)
7490 	buf = buflist_findnr((int)avar->vval.v_number);
7491     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7492     {
7493 	buf = buflist_findname_exp(avar->vval.v_string);
7494 	if (buf == NULL)
7495 	{
7496 	    /* No full path name match, try a match with a URL or a "nofile"
7497 	     * buffer, these don't use the full path. */
7498 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7499 		if (buf->b_fname != NULL
7500 			&& (path_with_url(buf->b_fname)
7501 #ifdef FEAT_QUICKFIX
7502 			    || bt_nofile(buf)
7503 #endif
7504 			   )
7505 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7506 		    break;
7507 	}
7508     }
7509     return buf;
7510 }
7511 
7512 /*
7513  * "bufexists(expr)" function
7514  */
7515     static void
7516 f_bufexists(argvars, rettv)
7517     typval_T	*argvars;
7518     typval_T	*rettv;
7519 {
7520     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7521 }
7522 
7523 /*
7524  * "buflisted(expr)" function
7525  */
7526     static void
7527 f_buflisted(argvars, rettv)
7528     typval_T	*argvars;
7529     typval_T	*rettv;
7530 {
7531     buf_T	*buf;
7532 
7533     buf = find_buffer(&argvars[0]);
7534     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7535 }
7536 
7537 /*
7538  * "bufloaded(expr)" function
7539  */
7540     static void
7541 f_bufloaded(argvars, rettv)
7542     typval_T	*argvars;
7543     typval_T	*rettv;
7544 {
7545     buf_T	*buf;
7546 
7547     buf = find_buffer(&argvars[0]);
7548     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7549 }
7550 
7551 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7552 
7553 /*
7554  * Get buffer by number or pattern.
7555  */
7556     static buf_T *
7557 get_buf_tv(tv)
7558     typval_T	*tv;
7559 {
7560     char_u	*name = tv->vval.v_string;
7561     int		save_magic;
7562     char_u	*save_cpo;
7563     buf_T	*buf;
7564 
7565     if (tv->v_type == VAR_NUMBER)
7566 	return buflist_findnr((int)tv->vval.v_number);
7567     if (tv->v_type != VAR_STRING)
7568 	return NULL;
7569     if (name == NULL || *name == NUL)
7570 	return curbuf;
7571     if (name[0] == '$' && name[1] == NUL)
7572 	return lastbuf;
7573 
7574     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7575     save_magic = p_magic;
7576     p_magic = TRUE;
7577     save_cpo = p_cpo;
7578     p_cpo = (char_u *)"";
7579 
7580     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7581 								TRUE, FALSE));
7582 
7583     p_magic = save_magic;
7584     p_cpo = save_cpo;
7585 
7586     /* If not found, try expanding the name, like done for bufexists(). */
7587     if (buf == NULL)
7588 	buf = find_buffer(tv);
7589 
7590     return buf;
7591 }
7592 
7593 /*
7594  * "bufname(expr)" function
7595  */
7596     static void
7597 f_bufname(argvars, rettv)
7598     typval_T	*argvars;
7599     typval_T	*rettv;
7600 {
7601     buf_T	*buf;
7602 
7603     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7604     ++emsg_off;
7605     buf = get_buf_tv(&argvars[0]);
7606     rettv->v_type = VAR_STRING;
7607     if (buf != NULL && buf->b_fname != NULL)
7608 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7609     else
7610 	rettv->vval.v_string = NULL;
7611     --emsg_off;
7612 }
7613 
7614 /*
7615  * "bufnr(expr)" function
7616  */
7617     static void
7618 f_bufnr(argvars, rettv)
7619     typval_T	*argvars;
7620     typval_T	*rettv;
7621 {
7622     buf_T	*buf;
7623 
7624     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7625     ++emsg_off;
7626     buf = get_buf_tv(&argvars[0]);
7627     if (buf != NULL)
7628 	rettv->vval.v_number = buf->b_fnum;
7629     else
7630 	rettv->vval.v_number = -1;
7631     --emsg_off;
7632 }
7633 
7634 /*
7635  * "bufwinnr(nr)" function
7636  */
7637     static void
7638 f_bufwinnr(argvars, rettv)
7639     typval_T	*argvars;
7640     typval_T	*rettv;
7641 {
7642 #ifdef FEAT_WINDOWS
7643     win_T	*wp;
7644     int		winnr = 0;
7645 #endif
7646     buf_T	*buf;
7647 
7648     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7649     ++emsg_off;
7650     buf = get_buf_tv(&argvars[0]);
7651 #ifdef FEAT_WINDOWS
7652     for (wp = firstwin; wp; wp = wp->w_next)
7653     {
7654 	++winnr;
7655 	if (wp->w_buffer == buf)
7656 	    break;
7657     }
7658     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7659 #else
7660     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7661 #endif
7662     --emsg_off;
7663 }
7664 
7665 /*
7666  * "byte2line(byte)" function
7667  */
7668 /*ARGSUSED*/
7669     static void
7670 f_byte2line(argvars, rettv)
7671     typval_T	*argvars;
7672     typval_T	*rettv;
7673 {
7674 #ifndef FEAT_BYTEOFF
7675     rettv->vval.v_number = -1;
7676 #else
7677     long	boff = 0;
7678 
7679     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7680     if (boff < 0)
7681 	rettv->vval.v_number = -1;
7682     else
7683 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7684 							  (linenr_T)0, &boff);
7685 #endif
7686 }
7687 
7688 /*
7689  * "byteidx()" function
7690  */
7691 /*ARGSUSED*/
7692     static void
7693 f_byteidx(argvars, rettv)
7694     typval_T	*argvars;
7695     typval_T	*rettv;
7696 {
7697 #ifdef FEAT_MBYTE
7698     char_u	*t;
7699 #endif
7700     char_u	*str;
7701     long	idx;
7702 
7703     str = get_tv_string_chk(&argvars[0]);
7704     idx = get_tv_number_chk(&argvars[1], NULL);
7705     rettv->vval.v_number = -1;
7706     if (str == NULL || idx < 0)
7707 	return;
7708 
7709 #ifdef FEAT_MBYTE
7710     t = str;
7711     for ( ; idx > 0; idx--)
7712     {
7713 	if (*t == NUL)		/* EOL reached */
7714 	    return;
7715 	t += (*mb_ptr2len)(t);
7716     }
7717     rettv->vval.v_number = t - str;
7718 #else
7719     if (idx <= STRLEN(str))
7720 	rettv->vval.v_number = idx;
7721 #endif
7722 }
7723 
7724 /*
7725  * "call(func, arglist)" function
7726  */
7727     static void
7728 f_call(argvars, rettv)
7729     typval_T	*argvars;
7730     typval_T	*rettv;
7731 {
7732     char_u	*func;
7733     typval_T	argv[MAX_FUNC_ARGS];
7734     int		argc = 0;
7735     listitem_T	*item;
7736     int		dummy;
7737     dict_T	*selfdict = NULL;
7738 
7739     rettv->vval.v_number = 0;
7740     if (argvars[1].v_type != VAR_LIST)
7741     {
7742 	EMSG(_(e_listreq));
7743 	return;
7744     }
7745     if (argvars[1].vval.v_list == NULL)
7746 	return;
7747 
7748     if (argvars[0].v_type == VAR_FUNC)
7749 	func = argvars[0].vval.v_string;
7750     else
7751 	func = get_tv_string(&argvars[0]);
7752     if (*func == NUL)
7753 	return;		/* type error or empty name */
7754 
7755     if (argvars[2].v_type != VAR_UNKNOWN)
7756     {
7757 	if (argvars[2].v_type != VAR_DICT)
7758 	{
7759 	    EMSG(_(e_dictreq));
7760 	    return;
7761 	}
7762 	selfdict = argvars[2].vval.v_dict;
7763     }
7764 
7765     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7766 							 item = item->li_next)
7767     {
7768 	if (argc == MAX_FUNC_ARGS)
7769 	{
7770 	    EMSG(_("E699: Too many arguments"));
7771 	    break;
7772 	}
7773 	/* Make a copy of each argument.  This is needed to be able to set
7774 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7775 	 */
7776 	copy_tv(&item->li_tv, &argv[argc++]);
7777     }
7778 
7779     if (item == NULL)
7780 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
7781 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
7782 						      &dummy, TRUE, selfdict);
7783 
7784     /* Free the arguments. */
7785     while (argc > 0)
7786 	clear_tv(&argv[--argc]);
7787 }
7788 
7789 /*
7790  * "char2nr(string)" function
7791  */
7792     static void
7793 f_char2nr(argvars, rettv)
7794     typval_T	*argvars;
7795     typval_T	*rettv;
7796 {
7797 #ifdef FEAT_MBYTE
7798     if (has_mbyte)
7799 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
7800     else
7801 #endif
7802     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
7803 }
7804 
7805 /*
7806  * "cindent(lnum)" function
7807  */
7808     static void
7809 f_cindent(argvars, rettv)
7810     typval_T	*argvars;
7811     typval_T	*rettv;
7812 {
7813 #ifdef FEAT_CINDENT
7814     pos_T	pos;
7815     linenr_T	lnum;
7816 
7817     pos = curwin->w_cursor;
7818     lnum = get_tv_lnum(argvars);
7819     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
7820     {
7821 	curwin->w_cursor.lnum = lnum;
7822 	rettv->vval.v_number = get_c_indent();
7823 	curwin->w_cursor = pos;
7824     }
7825     else
7826 #endif
7827 	rettv->vval.v_number = -1;
7828 }
7829 
7830 /*
7831  * "col(string)" function
7832  */
7833     static void
7834 f_col(argvars, rettv)
7835     typval_T	*argvars;
7836     typval_T	*rettv;
7837 {
7838     colnr_T	col = 0;
7839     pos_T	*fp;
7840 
7841     fp = var2fpos(&argvars[0], FALSE);
7842     if (fp != NULL)
7843     {
7844 	if (fp->col == MAXCOL)
7845 	{
7846 	    /* '> can be MAXCOL, get the length of the line then */
7847 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
7848 		col = STRLEN(ml_get(fp->lnum)) + 1;
7849 	    else
7850 		col = MAXCOL;
7851 	}
7852 	else
7853 	{
7854 	    col = fp->col + 1;
7855 #ifdef FEAT_VIRTUALEDIT
7856 	    /* col(".") when the cursor is on the NUL at the end of the line
7857 	     * because of "coladd" can be seen as an extra column. */
7858 	    if (virtual_active() && fp == &curwin->w_cursor)
7859 	    {
7860 		char_u	*p = ml_get_cursor();
7861 
7862 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
7863 				 curwin->w_virtcol - curwin->w_cursor.coladd))
7864 		{
7865 # ifdef FEAT_MBYTE
7866 		    int		l;
7867 
7868 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
7869 			col += l;
7870 # else
7871 		    if (*p != NUL && p[1] == NUL)
7872 			++col;
7873 # endif
7874 		}
7875 	    }
7876 #endif
7877 	}
7878     }
7879     rettv->vval.v_number = col;
7880 }
7881 
7882 #if defined(FEAT_INS_EXPAND)
7883 /*
7884  * "complete_add()" function
7885  */
7886 /*ARGSUSED*/
7887     static void
7888 f_complete_add(argvars, rettv)
7889     typval_T	*argvars;
7890     typval_T	*rettv;
7891 {
7892     char_u	*s;
7893 
7894     s = get_tv_string_chk(&argvars[0]);
7895     if (s != NULL)
7896 	rettv->vval.v_number = ins_compl_add(s, -1, NULL, FORWARD, 0);
7897 }
7898 
7899 /*
7900  * "complete_check()" function
7901  */
7902 /*ARGSUSED*/
7903     static void
7904 f_complete_check(argvars, rettv)
7905     typval_T	*argvars;
7906     typval_T	*rettv;
7907 {
7908     int		saved = RedrawingDisabled;
7909 
7910     RedrawingDisabled = 0;
7911     ins_compl_check_keys(0);
7912     rettv->vval.v_number = compl_interrupted;
7913     RedrawingDisabled = saved;
7914 }
7915 #endif
7916 
7917 /*
7918  * "confirm(message, buttons[, default [, type]])" function
7919  */
7920 /*ARGSUSED*/
7921     static void
7922 f_confirm(argvars, rettv)
7923     typval_T	*argvars;
7924     typval_T	*rettv;
7925 {
7926 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
7927     char_u	*message;
7928     char_u	*buttons = NULL;
7929     char_u	buf[NUMBUFLEN];
7930     char_u	buf2[NUMBUFLEN];
7931     int		def = 1;
7932     int		type = VIM_GENERIC;
7933     char_u	*typestr;
7934     int		error = FALSE;
7935 
7936     message = get_tv_string_chk(&argvars[0]);
7937     if (message == NULL)
7938 	error = TRUE;
7939     if (argvars[1].v_type != VAR_UNKNOWN)
7940     {
7941 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
7942 	if (buttons == NULL)
7943 	    error = TRUE;
7944 	if (argvars[2].v_type != VAR_UNKNOWN)
7945 	{
7946 	    def = get_tv_number_chk(&argvars[2], &error);
7947 	    if (argvars[3].v_type != VAR_UNKNOWN)
7948 	    {
7949 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
7950 		if (typestr == NULL)
7951 		    error = TRUE;
7952 		else
7953 		{
7954 		    switch (TOUPPER_ASC(*typestr))
7955 		    {
7956 			case 'E': type = VIM_ERROR; break;
7957 			case 'Q': type = VIM_QUESTION; break;
7958 			case 'I': type = VIM_INFO; break;
7959 			case 'W': type = VIM_WARNING; break;
7960 			case 'G': type = VIM_GENERIC; break;
7961 		    }
7962 		}
7963 	    }
7964 	}
7965     }
7966 
7967     if (buttons == NULL || *buttons == NUL)
7968 	buttons = (char_u *)_("&Ok");
7969 
7970     if (error)
7971 	rettv->vval.v_number = 0;
7972     else
7973 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
7974 								   def, NULL);
7975 #else
7976     rettv->vval.v_number = 0;
7977 #endif
7978 }
7979 
7980 /*
7981  * "copy()" function
7982  */
7983     static void
7984 f_copy(argvars, rettv)
7985     typval_T	*argvars;
7986     typval_T	*rettv;
7987 {
7988     item_copy(&argvars[0], rettv, FALSE, 0);
7989 }
7990 
7991 /*
7992  * "count()" function
7993  */
7994     static void
7995 f_count(argvars, rettv)
7996     typval_T	*argvars;
7997     typval_T	*rettv;
7998 {
7999     long	n = 0;
8000     int		ic = FALSE;
8001 
8002     if (argvars[0].v_type == VAR_LIST)
8003     {
8004 	listitem_T	*li;
8005 	list_T		*l;
8006 	long		idx;
8007 
8008 	if ((l = argvars[0].vval.v_list) != NULL)
8009 	{
8010 	    li = l->lv_first;
8011 	    if (argvars[2].v_type != VAR_UNKNOWN)
8012 	    {
8013 		int error = FALSE;
8014 
8015 		ic = get_tv_number_chk(&argvars[2], &error);
8016 		if (argvars[3].v_type != VAR_UNKNOWN)
8017 		{
8018 		    idx = get_tv_number_chk(&argvars[3], &error);
8019 		    if (!error)
8020 		    {
8021 			li = list_find(l, idx);
8022 			if (li == NULL)
8023 			    EMSGN(_(e_listidx), idx);
8024 		    }
8025 		}
8026 		if (error)
8027 		    li = NULL;
8028 	    }
8029 
8030 	    for ( ; li != NULL; li = li->li_next)
8031 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8032 		    ++n;
8033 	}
8034     }
8035     else if (argvars[0].v_type == VAR_DICT)
8036     {
8037 	int		todo;
8038 	dict_T		*d;
8039 	hashitem_T	*hi;
8040 
8041 	if ((d = argvars[0].vval.v_dict) != NULL)
8042 	{
8043 	    int error = FALSE;
8044 
8045 	    if (argvars[2].v_type != VAR_UNKNOWN)
8046 	    {
8047 		ic = get_tv_number_chk(&argvars[2], &error);
8048 		if (argvars[3].v_type != VAR_UNKNOWN)
8049 		    EMSG(_(e_invarg));
8050 	    }
8051 
8052 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8053 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8054 	    {
8055 		if (!HASHITEM_EMPTY(hi))
8056 		{
8057 		    --todo;
8058 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8059 			++n;
8060 		}
8061 	    }
8062 	}
8063     }
8064     else
8065 	EMSG2(_(e_listdictarg), "count()");
8066     rettv->vval.v_number = n;
8067 }
8068 
8069 /*
8070  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8071  *
8072  * Checks the existence of a cscope connection.
8073  */
8074 /*ARGSUSED*/
8075     static void
8076 f_cscope_connection(argvars, rettv)
8077     typval_T	*argvars;
8078     typval_T	*rettv;
8079 {
8080 #ifdef FEAT_CSCOPE
8081     int		num = 0;
8082     char_u	*dbpath = NULL;
8083     char_u	*prepend = NULL;
8084     char_u	buf[NUMBUFLEN];
8085 
8086     if (argvars[0].v_type != VAR_UNKNOWN
8087 	    && argvars[1].v_type != VAR_UNKNOWN)
8088     {
8089 	num = (int)get_tv_number(&argvars[0]);
8090 	dbpath = get_tv_string(&argvars[1]);
8091 	if (argvars[2].v_type != VAR_UNKNOWN)
8092 	    prepend = get_tv_string_buf(&argvars[2], buf);
8093     }
8094 
8095     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8096 #else
8097     rettv->vval.v_number = 0;
8098 #endif
8099 }
8100 
8101 /*
8102  * "cursor(lnum, col)" function
8103  *
8104  * Moves the cursor to the specified line and column
8105  */
8106 /*ARGSUSED*/
8107     static void
8108 f_cursor(argvars, rettv)
8109     typval_T	*argvars;
8110     typval_T	*rettv;
8111 {
8112     long	line, col;
8113 
8114     line = get_tv_lnum(argvars);
8115     col = get_tv_number_chk(&argvars[1], NULL);
8116     if (line < 0 || col < 0)
8117 	return;		/* type error; errmsg already given */
8118     if (line > 0)
8119 	curwin->w_cursor.lnum = line;
8120     if (col > 0)
8121 	curwin->w_cursor.col = col - 1;
8122 #ifdef FEAT_VIRTUALEDIT
8123     curwin->w_cursor.coladd = 0;
8124 #endif
8125 
8126     /* Make sure the cursor is in a valid position. */
8127     check_cursor();
8128 #ifdef FEAT_MBYTE
8129     /* Correct cursor for multi-byte character. */
8130     if (has_mbyte)
8131 	mb_adjust_cursor();
8132 #endif
8133 
8134     curwin->w_set_curswant = TRUE;
8135 }
8136 
8137 /*
8138  * "deepcopy()" function
8139  */
8140     static void
8141 f_deepcopy(argvars, rettv)
8142     typval_T	*argvars;
8143     typval_T	*rettv;
8144 {
8145     int		noref = 0;
8146 
8147     if (argvars[1].v_type != VAR_UNKNOWN)
8148 	noref = get_tv_number_chk(&argvars[1], NULL);
8149     if (noref < 0 || noref > 1)
8150 	EMSG(_(e_invarg));
8151     else
8152 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8153 }
8154 
8155 /*
8156  * "delete()" function
8157  */
8158     static void
8159 f_delete(argvars, rettv)
8160     typval_T	*argvars;
8161     typval_T	*rettv;
8162 {
8163     if (check_restricted() || check_secure())
8164 	rettv->vval.v_number = -1;
8165     else
8166 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8167 }
8168 
8169 /*
8170  * "did_filetype()" function
8171  */
8172 /*ARGSUSED*/
8173     static void
8174 f_did_filetype(argvars, rettv)
8175     typval_T	*argvars;
8176     typval_T	*rettv;
8177 {
8178 #ifdef FEAT_AUTOCMD
8179     rettv->vval.v_number = did_filetype;
8180 #else
8181     rettv->vval.v_number = 0;
8182 #endif
8183 }
8184 
8185 /*
8186  * "diff_filler()" function
8187  */
8188 /*ARGSUSED*/
8189     static void
8190 f_diff_filler(argvars, rettv)
8191     typval_T	*argvars;
8192     typval_T	*rettv;
8193 {
8194 #ifdef FEAT_DIFF
8195     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8196 #endif
8197 }
8198 
8199 /*
8200  * "diff_hlID()" function
8201  */
8202 /*ARGSUSED*/
8203     static void
8204 f_diff_hlID(argvars, rettv)
8205     typval_T	*argvars;
8206     typval_T	*rettv;
8207 {
8208 #ifdef FEAT_DIFF
8209     linenr_T		lnum = get_tv_lnum(argvars);
8210     static linenr_T	prev_lnum = 0;
8211     static int		changedtick = 0;
8212     static int		fnum = 0;
8213     static int		change_start = 0;
8214     static int		change_end = 0;
8215     static enum hlf_value hlID = 0;
8216     int			filler_lines;
8217     int			col;
8218 
8219     if (lnum < 0)	/* ignore type error in {lnum} arg */
8220 	lnum = 0;
8221     if (lnum != prev_lnum
8222 	    || changedtick != curbuf->b_changedtick
8223 	    || fnum != curbuf->b_fnum)
8224     {
8225 	/* New line, buffer, change: need to get the values. */
8226 	filler_lines = diff_check(curwin, lnum);
8227 	if (filler_lines < 0)
8228 	{
8229 	    if (filler_lines == -1)
8230 	    {
8231 		change_start = MAXCOL;
8232 		change_end = -1;
8233 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8234 		    hlID = HLF_ADD;	/* added line */
8235 		else
8236 		    hlID = HLF_CHD;	/* changed line */
8237 	    }
8238 	    else
8239 		hlID = HLF_ADD;	/* added line */
8240 	}
8241 	else
8242 	    hlID = (enum hlf_value)0;
8243 	prev_lnum = lnum;
8244 	changedtick = curbuf->b_changedtick;
8245 	fnum = curbuf->b_fnum;
8246     }
8247 
8248     if (hlID == HLF_CHD || hlID == HLF_TXD)
8249     {
8250 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8251 	if (col >= change_start && col <= change_end)
8252 	    hlID = HLF_TXD;			/* changed text */
8253 	else
8254 	    hlID = HLF_CHD;			/* changed line */
8255     }
8256     rettv->vval.v_number = hlID == (enum hlf_value)0 ? 0 : (int)hlID;
8257 #endif
8258 }
8259 
8260 /*
8261  * "empty({expr})" function
8262  */
8263     static void
8264 f_empty(argvars, rettv)
8265     typval_T	*argvars;
8266     typval_T	*rettv;
8267 {
8268     int		n;
8269 
8270     switch (argvars[0].v_type)
8271     {
8272 	case VAR_STRING:
8273 	case VAR_FUNC:
8274 	    n = argvars[0].vval.v_string == NULL
8275 					  || *argvars[0].vval.v_string == NUL;
8276 	    break;
8277 	case VAR_NUMBER:
8278 	    n = argvars[0].vval.v_number == 0;
8279 	    break;
8280 	case VAR_LIST:
8281 	    n = argvars[0].vval.v_list == NULL
8282 				  || argvars[0].vval.v_list->lv_first == NULL;
8283 	    break;
8284 	case VAR_DICT:
8285 	    n = argvars[0].vval.v_dict == NULL
8286 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8287 	    break;
8288 	default:
8289 	    EMSG2(_(e_intern2), "f_empty()");
8290 	    n = 0;
8291     }
8292 
8293     rettv->vval.v_number = n;
8294 }
8295 
8296 /*
8297  * "escape({string}, {chars})" function
8298  */
8299     static void
8300 f_escape(argvars, rettv)
8301     typval_T	*argvars;
8302     typval_T	*rettv;
8303 {
8304     char_u	buf[NUMBUFLEN];
8305 
8306     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8307 					 get_tv_string_buf(&argvars[1], buf));
8308     rettv->v_type = VAR_STRING;
8309 }
8310 
8311 /*
8312  * "eval()" function
8313  */
8314 /*ARGSUSED*/
8315     static void
8316 f_eval(argvars, rettv)
8317     typval_T	*argvars;
8318     typval_T	*rettv;
8319 {
8320     char_u	*s;
8321 
8322     s = get_tv_string_chk(&argvars[0]);
8323     if (s != NULL)
8324 	s = skipwhite(s);
8325 
8326     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8327     {
8328 	rettv->v_type = VAR_NUMBER;
8329 	rettv->vval.v_number = 0;
8330     }
8331     else if (*s != NUL)
8332 	EMSG(_(e_trailing));
8333 }
8334 
8335 /*
8336  * "eventhandler()" function
8337  */
8338 /*ARGSUSED*/
8339     static void
8340 f_eventhandler(argvars, rettv)
8341     typval_T	*argvars;
8342     typval_T	*rettv;
8343 {
8344     rettv->vval.v_number = vgetc_busy;
8345 }
8346 
8347 /*
8348  * "executable()" function
8349  */
8350     static void
8351 f_executable(argvars, rettv)
8352     typval_T	*argvars;
8353     typval_T	*rettv;
8354 {
8355     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8356 }
8357 
8358 /*
8359  * "exists()" function
8360  */
8361     static void
8362 f_exists(argvars, rettv)
8363     typval_T	*argvars;
8364     typval_T	*rettv;
8365 {
8366     char_u	*p;
8367     char_u	*name;
8368     int		n = FALSE;
8369     int		len = 0;
8370 
8371     p = get_tv_string(&argvars[0]);
8372     if (*p == '$')			/* environment variable */
8373     {
8374 	/* first try "normal" environment variables (fast) */
8375 	if (mch_getenv(p + 1) != NULL)
8376 	    n = TRUE;
8377 	else
8378 	{
8379 	    /* try expanding things like $VIM and ${HOME} */
8380 	    p = expand_env_save(p);
8381 	    if (p != NULL && *p != '$')
8382 		n = TRUE;
8383 	    vim_free(p);
8384 	}
8385     }
8386     else if (*p == '&' || *p == '+')			/* option */
8387 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8388     else if (*p == '*')			/* internal or user defined function */
8389     {
8390 	n = function_exists(p + 1);
8391     }
8392     else if (*p == ':')
8393     {
8394 	n = cmd_exists(p + 1);
8395     }
8396     else if (*p == '#')
8397     {
8398 #ifdef FEAT_AUTOCMD
8399 	name = p + 1;
8400 	p = vim_strchr(name, '#');
8401 	if (p != NULL)
8402 	    n = au_exists(name, p, p + 1);
8403 	else
8404 	    n = au_exists(name, name + STRLEN(name), NULL);
8405 #endif
8406     }
8407     else				/* internal variable */
8408     {
8409 	char_u	    *tofree;
8410 	typval_T    tv;
8411 
8412 	/* get_name_len() takes care of expanding curly braces */
8413 	name = p;
8414 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8415 	if (len > 0)
8416 	{
8417 	    if (tofree != NULL)
8418 		name = tofree;
8419 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8420 	    if (n)
8421 	    {
8422 		/* handle d.key, l[idx], f(expr) */
8423 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8424 		if (n)
8425 		    clear_tv(&tv);
8426 	    }
8427 	}
8428 
8429 	vim_free(tofree);
8430     }
8431 
8432     rettv->vval.v_number = n;
8433 }
8434 
8435 /*
8436  * "expand()" function
8437  */
8438     static void
8439 f_expand(argvars, rettv)
8440     typval_T	*argvars;
8441     typval_T	*rettv;
8442 {
8443     char_u	*s;
8444     int		len;
8445     char_u	*errormsg;
8446     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8447     expand_T	xpc;
8448     int		error = FALSE;
8449 
8450     rettv->v_type = VAR_STRING;
8451     s = get_tv_string(&argvars[0]);
8452     if (*s == '%' || *s == '#' || *s == '<')
8453     {
8454 	++emsg_off;
8455 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8456 	--emsg_off;
8457     }
8458     else
8459     {
8460 	/* When the optional second argument is non-zero, don't remove matches
8461 	 * for 'suffixes' and 'wildignore' */
8462 	if (argvars[1].v_type != VAR_UNKNOWN
8463 				    && get_tv_number_chk(&argvars[1], &error))
8464 	    flags |= WILD_KEEP_ALL;
8465 	if (!error)
8466 	{
8467 	    ExpandInit(&xpc);
8468 	    xpc.xp_context = EXPAND_FILES;
8469 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8470 	    ExpandCleanup(&xpc);
8471 	}
8472 	else
8473 	    rettv->vval.v_string = NULL;
8474     }
8475 }
8476 
8477 /*
8478  * "extend(list, list [, idx])" function
8479  * "extend(dict, dict [, action])" function
8480  */
8481     static void
8482 f_extend(argvars, rettv)
8483     typval_T	*argvars;
8484     typval_T	*rettv;
8485 {
8486     rettv->vval.v_number = 0;
8487     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8488     {
8489 	list_T		*l1, *l2;
8490 	listitem_T	*item;
8491 	long		before;
8492 	int		error = FALSE;
8493 
8494 	l1 = argvars[0].vval.v_list;
8495 	l2 = argvars[1].vval.v_list;
8496 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8497 		&& l2 != NULL)
8498 	{
8499 	    if (argvars[2].v_type != VAR_UNKNOWN)
8500 	    {
8501 		before = get_tv_number_chk(&argvars[2], &error);
8502 		if (error)
8503 		    return;		/* type error; errmsg already given */
8504 
8505 		if (before == l1->lv_len)
8506 		    item = NULL;
8507 		else
8508 		{
8509 		    item = list_find(l1, before);
8510 		    if (item == NULL)
8511 		    {
8512 			EMSGN(_(e_listidx), before);
8513 			return;
8514 		    }
8515 		}
8516 	    }
8517 	    else
8518 		item = NULL;
8519 	    list_extend(l1, l2, item);
8520 
8521 	    copy_tv(&argvars[0], rettv);
8522 	}
8523     }
8524     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8525     {
8526 	dict_T		*d1, *d2;
8527 	dictitem_T	*di1;
8528 	char_u		*action;
8529 	int		i;
8530 	hashitem_T	*hi2;
8531 	int		todo;
8532 
8533 	d1 = argvars[0].vval.v_dict;
8534 	d2 = argvars[1].vval.v_dict;
8535 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8536 		&& d2 != NULL)
8537 	{
8538 	    /* Check the third argument. */
8539 	    if (argvars[2].v_type != VAR_UNKNOWN)
8540 	    {
8541 		static char *(av[]) = {"keep", "force", "error"};
8542 
8543 		action = get_tv_string_chk(&argvars[2]);
8544 		if (action == NULL)
8545 		    return;		/* type error; errmsg already given */
8546 		for (i = 0; i < 3; ++i)
8547 		    if (STRCMP(action, av[i]) == 0)
8548 			break;
8549 		if (i == 3)
8550 		{
8551 		    EMSGN(_(e_invarg2), action);
8552 		    return;
8553 		}
8554 	    }
8555 	    else
8556 		action = (char_u *)"force";
8557 
8558 	    /* Go over all entries in the second dict and add them to the
8559 	     * first dict. */
8560 	    todo = d2->dv_hashtab.ht_used;
8561 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8562 	    {
8563 		if (!HASHITEM_EMPTY(hi2))
8564 		{
8565 		    --todo;
8566 		    di1 = dict_find(d1, hi2->hi_key, -1);
8567 		    if (di1 == NULL)
8568 		    {
8569 			di1 = dictitem_copy(HI2DI(hi2));
8570 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8571 			    dictitem_free(di1);
8572 		    }
8573 		    else if (*action == 'e')
8574 		    {
8575 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8576 			break;
8577 		    }
8578 		    else if (*action == 'f')
8579 		    {
8580 			clear_tv(&di1->di_tv);
8581 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8582 		    }
8583 		}
8584 	    }
8585 
8586 	    copy_tv(&argvars[0], rettv);
8587 	}
8588     }
8589     else
8590 	EMSG2(_(e_listdictarg), "extend()");
8591 }
8592 
8593 /*
8594  * "filereadable()" function
8595  */
8596     static void
8597 f_filereadable(argvars, rettv)
8598     typval_T	*argvars;
8599     typval_T	*rettv;
8600 {
8601     FILE	*fd;
8602     char_u	*p;
8603     int		n;
8604 
8605     p = get_tv_string(&argvars[0]);
8606     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8607     {
8608 	n = TRUE;
8609 	fclose(fd);
8610     }
8611     else
8612 	n = FALSE;
8613 
8614     rettv->vval.v_number = n;
8615 }
8616 
8617 /*
8618  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8619  * rights to write into.
8620  */
8621     static void
8622 f_filewritable(argvars, rettv)
8623     typval_T	*argvars;
8624     typval_T	*rettv;
8625 {
8626     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8627 }
8628 
8629 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8630 
8631     static void
8632 findfilendir(argvars, rettv, dir)
8633     typval_T	*argvars;
8634     typval_T	*rettv;
8635     int		dir;
8636 {
8637 #ifdef FEAT_SEARCHPATH
8638     char_u	*fname;
8639     char_u	*fresult = NULL;
8640     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8641     char_u	*p;
8642     char_u	pathbuf[NUMBUFLEN];
8643     int		count = 1;
8644     int		first = TRUE;
8645 
8646     fname = get_tv_string(&argvars[0]);
8647 
8648     if (argvars[1].v_type != VAR_UNKNOWN)
8649     {
8650 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8651 	if (p == NULL)
8652 	    count = -1;	    /* error */
8653 	else
8654 	{
8655 	    if (*p != NUL)
8656 		path = p;
8657 
8658 	    if (argvars[2].v_type != VAR_UNKNOWN)
8659 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8660 	}
8661     }
8662 
8663     if (*fname != NUL && count >= 0)
8664     {
8665 	do
8666 	{
8667 	    vim_free(fresult);
8668 	    fresult = find_file_in_path_option(first ? fname : NULL,
8669 					       first ? (int)STRLEN(fname) : 0,
8670 					       0, first, path, dir, NULL);
8671 	    first = FALSE;
8672 	} while (--count > 0 && fresult != NULL);
8673     }
8674 
8675     rettv->vval.v_string = fresult;
8676 #else
8677     rettv->vval.v_string = NULL;
8678 #endif
8679     rettv->v_type = VAR_STRING;
8680 }
8681 
8682 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8683 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8684 
8685 /*
8686  * Implementation of map() and filter().
8687  */
8688     static void
8689 filter_map(argvars, rettv, map)
8690     typval_T	*argvars;
8691     typval_T	*rettv;
8692     int		map;
8693 {
8694     char_u	buf[NUMBUFLEN];
8695     char_u	*expr;
8696     listitem_T	*li, *nli;
8697     list_T	*l = NULL;
8698     dictitem_T	*di;
8699     hashtab_T	*ht;
8700     hashitem_T	*hi;
8701     dict_T	*d = NULL;
8702     typval_T	save_val;
8703     typval_T	save_key;
8704     int		rem;
8705     int		todo;
8706     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8707 
8708 
8709     rettv->vval.v_number = 0;
8710     if (argvars[0].v_type == VAR_LIST)
8711     {
8712 	if ((l = argvars[0].vval.v_list) == NULL
8713 		|| (map && tv_check_lock(l->lv_lock, msg)))
8714 	    return;
8715     }
8716     else if (argvars[0].v_type == VAR_DICT)
8717     {
8718 	if ((d = argvars[0].vval.v_dict) == NULL
8719 		|| (map && tv_check_lock(d->dv_lock, msg)))
8720 	    return;
8721     }
8722     else
8723     {
8724 	EMSG2(_(e_listdictarg), msg);
8725 	return;
8726     }
8727 
8728     expr = get_tv_string_buf_chk(&argvars[1], buf);
8729     /* On type errors, the preceding call has already displayed an error
8730      * message.  Avoid a misleading error message for an empty string that
8731      * was not passed as argument. */
8732     if (expr != NULL)
8733     {
8734 	prepare_vimvar(VV_VAL, &save_val);
8735 	expr = skipwhite(expr);
8736 
8737 	if (argvars[0].v_type == VAR_DICT)
8738 	{
8739 	    prepare_vimvar(VV_KEY, &save_key);
8740 	    vimvars[VV_KEY].vv_type = VAR_STRING;
8741 
8742 	    ht = &d->dv_hashtab;
8743 	    hash_lock(ht);
8744 	    todo = ht->ht_used;
8745 	    for (hi = ht->ht_array; todo > 0; ++hi)
8746 	    {
8747 		if (!HASHITEM_EMPTY(hi))
8748 		{
8749 		    --todo;
8750 		    di = HI2DI(hi);
8751 		    if (tv_check_lock(di->di_tv.v_lock, msg))
8752 			break;
8753 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
8754 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL)
8755 			break;
8756 		    if (!map && rem)
8757 			dictitem_remove(d, di);
8758 		    clear_tv(&vimvars[VV_KEY].vv_tv);
8759 		}
8760 	    }
8761 	    hash_unlock(ht);
8762 
8763 	    restore_vimvar(VV_KEY, &save_key);
8764 	}
8765 	else
8766 	{
8767 	    for (li = l->lv_first; li != NULL; li = nli)
8768 	    {
8769 		if (tv_check_lock(li->li_tv.v_lock, msg))
8770 		    break;
8771 		nli = li->li_next;
8772 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL)
8773 		    break;
8774 		if (!map && rem)
8775 		    listitem_remove(l, li);
8776 	    }
8777 	}
8778 
8779 	restore_vimvar(VV_VAL, &save_val);
8780     }
8781 
8782     copy_tv(&argvars[0], rettv);
8783 }
8784 
8785     static int
8786 filter_map_one(tv, expr, map, remp)
8787     typval_T	*tv;
8788     char_u	*expr;
8789     int		map;
8790     int		*remp;
8791 {
8792     typval_T	rettv;
8793     char_u	*s;
8794 
8795     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
8796     s = expr;
8797     if (eval1(&s, &rettv, TRUE) == FAIL)
8798 	return FAIL;
8799     if (*s != NUL)  /* check for trailing chars after expr */
8800     {
8801 	EMSG2(_(e_invexpr2), s);
8802 	return FAIL;
8803     }
8804     if (map)
8805     {
8806 	/* map(): replace the list item value */
8807 	clear_tv(tv);
8808 	*tv = rettv;
8809     }
8810     else
8811     {
8812 	int	    error = FALSE;
8813 
8814 	/* filter(): when expr is zero remove the item */
8815 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
8816 	clear_tv(&rettv);
8817 	/* On type error, nothing has been removed; return FAIL to stop the
8818 	 * loop.  The error message was given by get_tv_number_chk(). */
8819 	if (error)
8820 	    return FAIL;
8821     }
8822     clear_tv(&vimvars[VV_VAL].vv_tv);
8823     return OK;
8824 }
8825 
8826 /*
8827  * "filter()" function
8828  */
8829     static void
8830 f_filter(argvars, rettv)
8831     typval_T	*argvars;
8832     typval_T	*rettv;
8833 {
8834     filter_map(argvars, rettv, FALSE);
8835 }
8836 
8837 /*
8838  * "finddir({fname}[, {path}[, {count}]])" function
8839  */
8840     static void
8841 f_finddir(argvars, rettv)
8842     typval_T	*argvars;
8843     typval_T	*rettv;
8844 {
8845     findfilendir(argvars, rettv, TRUE);
8846 }
8847 
8848 /*
8849  * "findfile({fname}[, {path}[, {count}]])" function
8850  */
8851     static void
8852 f_findfile(argvars, rettv)
8853     typval_T	*argvars;
8854     typval_T	*rettv;
8855 {
8856     findfilendir(argvars, rettv, FALSE);
8857 }
8858 
8859 /*
8860  * "fnamemodify({fname}, {mods})" function
8861  */
8862     static void
8863 f_fnamemodify(argvars, rettv)
8864     typval_T	*argvars;
8865     typval_T	*rettv;
8866 {
8867     char_u	*fname;
8868     char_u	*mods;
8869     int		usedlen = 0;
8870     int		len;
8871     char_u	*fbuf = NULL;
8872     char_u	buf[NUMBUFLEN];
8873 
8874     fname = get_tv_string_chk(&argvars[0]);
8875     mods = get_tv_string_buf_chk(&argvars[1], buf);
8876     if (fname == NULL || mods == NULL)
8877 	fname = NULL;
8878     else
8879     {
8880 	len = (int)STRLEN(fname);
8881 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
8882     }
8883 
8884     rettv->v_type = VAR_STRING;
8885     if (fname == NULL)
8886 	rettv->vval.v_string = NULL;
8887     else
8888 	rettv->vval.v_string = vim_strnsave(fname, len);
8889     vim_free(fbuf);
8890 }
8891 
8892 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
8893 
8894 /*
8895  * "foldclosed()" function
8896  */
8897     static void
8898 foldclosed_both(argvars, rettv, end)
8899     typval_T	*argvars;
8900     typval_T	*rettv;
8901     int		end;
8902 {
8903 #ifdef FEAT_FOLDING
8904     linenr_T	lnum;
8905     linenr_T	first, last;
8906 
8907     lnum = get_tv_lnum(argvars);
8908     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8909     {
8910 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
8911 	{
8912 	    if (end)
8913 		rettv->vval.v_number = (varnumber_T)last;
8914 	    else
8915 		rettv->vval.v_number = (varnumber_T)first;
8916 	    return;
8917 	}
8918     }
8919 #endif
8920     rettv->vval.v_number = -1;
8921 }
8922 
8923 /*
8924  * "foldclosed()" function
8925  */
8926     static void
8927 f_foldclosed(argvars, rettv)
8928     typval_T	*argvars;
8929     typval_T	*rettv;
8930 {
8931     foldclosed_both(argvars, rettv, FALSE);
8932 }
8933 
8934 /*
8935  * "foldclosedend()" function
8936  */
8937     static void
8938 f_foldclosedend(argvars, rettv)
8939     typval_T	*argvars;
8940     typval_T	*rettv;
8941 {
8942     foldclosed_both(argvars, rettv, TRUE);
8943 }
8944 
8945 /*
8946  * "foldlevel()" function
8947  */
8948     static void
8949 f_foldlevel(argvars, rettv)
8950     typval_T	*argvars;
8951     typval_T	*rettv;
8952 {
8953 #ifdef FEAT_FOLDING
8954     linenr_T	lnum;
8955 
8956     lnum = get_tv_lnum(argvars);
8957     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8958 	rettv->vval.v_number = foldLevel(lnum);
8959     else
8960 #endif
8961 	rettv->vval.v_number = 0;
8962 }
8963 
8964 /*
8965  * "foldtext()" function
8966  */
8967 /*ARGSUSED*/
8968     static void
8969 f_foldtext(argvars, rettv)
8970     typval_T	*argvars;
8971     typval_T	*rettv;
8972 {
8973 #ifdef FEAT_FOLDING
8974     linenr_T	lnum;
8975     char_u	*s;
8976     char_u	*r;
8977     int		len;
8978     char	*txt;
8979 #endif
8980 
8981     rettv->v_type = VAR_STRING;
8982     rettv->vval.v_string = NULL;
8983 #ifdef FEAT_FOLDING
8984     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
8985 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
8986 						 <= curbuf->b_ml.ml_line_count
8987 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
8988     {
8989 	/* Find first non-empty line in the fold. */
8990 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
8991 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8992 	{
8993 	    if (!linewhite(lnum))
8994 		break;
8995 	    ++lnum;
8996 	}
8997 
8998 	/* Find interesting text in this line. */
8999 	s = skipwhite(ml_get(lnum));
9000 	/* skip C comment-start */
9001 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9002 	{
9003 	    s = skipwhite(s + 2);
9004 	    if (*skipwhite(s) == NUL
9005 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9006 	    {
9007 		s = skipwhite(ml_get(lnum + 1));
9008 		if (*s == '*')
9009 		    s = skipwhite(s + 1);
9010 	    }
9011 	}
9012 	txt = _("+-%s%3ld lines: ");
9013 	r = alloc((unsigned)(STRLEN(txt)
9014 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9015 		    + 20				    /* for %3ld */
9016 		    + STRLEN(s)));			    /* concatenated */
9017 	if (r != NULL)
9018 	{
9019 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9020 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9021 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9022 	    len = (int)STRLEN(r);
9023 	    STRCAT(r, s);
9024 	    /* remove 'foldmarker' and 'commentstring' */
9025 	    foldtext_cleanup(r + len);
9026 	    rettv->vval.v_string = r;
9027 	}
9028     }
9029 #endif
9030 }
9031 
9032 /*
9033  * "foldtextresult(lnum)" function
9034  */
9035 /*ARGSUSED*/
9036     static void
9037 f_foldtextresult(argvars, rettv)
9038     typval_T	*argvars;
9039     typval_T	*rettv;
9040 {
9041 #ifdef FEAT_FOLDING
9042     linenr_T	lnum;
9043     char_u	*text;
9044     char_u	buf[51];
9045     foldinfo_T  foldinfo;
9046     int		fold_count;
9047 #endif
9048 
9049     rettv->v_type = VAR_STRING;
9050     rettv->vval.v_string = NULL;
9051 #ifdef FEAT_FOLDING
9052     lnum = get_tv_lnum(argvars);
9053     /* treat illegal types and illegal string values for {lnum} the same */
9054     if (lnum < 0)
9055 	lnum = 0;
9056     fold_count = foldedCount(curwin, lnum, &foldinfo);
9057     if (fold_count > 0)
9058     {
9059 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9060 							      &foldinfo, buf);
9061 	if (text == buf)
9062 	    text = vim_strsave(text);
9063 	rettv->vval.v_string = text;
9064     }
9065 #endif
9066 }
9067 
9068 /*
9069  * "foreground()" function
9070  */
9071 /*ARGSUSED*/
9072     static void
9073 f_foreground(argvars, rettv)
9074     typval_T	*argvars;
9075     typval_T	*rettv;
9076 {
9077     rettv->vval.v_number = 0;
9078 #ifdef FEAT_GUI
9079     if (gui.in_use)
9080 	gui_mch_set_foreground();
9081 #else
9082 # ifdef WIN32
9083     win32_set_foreground();
9084 # endif
9085 #endif
9086 }
9087 
9088 /*
9089  * "function()" function
9090  */
9091 /*ARGSUSED*/
9092     static void
9093 f_function(argvars, rettv)
9094     typval_T	*argvars;
9095     typval_T	*rettv;
9096 {
9097     char_u	*s;
9098 
9099     rettv->vval.v_number = 0;
9100     s = get_tv_string(&argvars[0]);
9101     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9102 	EMSG2(_(e_invarg2), s);
9103     else if (!function_exists(s))
9104 	EMSG2(_("E700: Unknown function: %s"), s);
9105     else
9106     {
9107 	rettv->vval.v_string = vim_strsave(s);
9108 	rettv->v_type = VAR_FUNC;
9109     }
9110 }
9111 
9112 /*
9113  * "garbagecollect()" function
9114  */
9115 /*ARGSUSED*/
9116     static void
9117 f_garbagecollect(argvars, rettv)
9118     typval_T	*argvars;
9119     typval_T	*rettv;
9120 {
9121     garbage_collect();
9122 }
9123 
9124 /*
9125  * "get()" function
9126  */
9127     static void
9128 f_get(argvars, rettv)
9129     typval_T	*argvars;
9130     typval_T	*rettv;
9131 {
9132     listitem_T	*li;
9133     list_T	*l;
9134     dictitem_T	*di;
9135     dict_T	*d;
9136     typval_T	*tv = NULL;
9137 
9138     if (argvars[0].v_type == VAR_LIST)
9139     {
9140 	if ((l = argvars[0].vval.v_list) != NULL)
9141 	{
9142 	    int		error = FALSE;
9143 
9144 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9145 	    if (!error && li != NULL)
9146 		tv = &li->li_tv;
9147 	}
9148     }
9149     else if (argvars[0].v_type == VAR_DICT)
9150     {
9151 	if ((d = argvars[0].vval.v_dict) != NULL)
9152 	{
9153 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9154 	    if (di != NULL)
9155 		tv = &di->di_tv;
9156 	}
9157     }
9158     else
9159 	EMSG2(_(e_listdictarg), "get()");
9160 
9161     if (tv == NULL)
9162     {
9163 	if (argvars[2].v_type == VAR_UNKNOWN)
9164 	    rettv->vval.v_number = 0;
9165 	else
9166 	    copy_tv(&argvars[2], rettv);
9167     }
9168     else
9169 	copy_tv(tv, rettv);
9170 }
9171 
9172 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9173 
9174 /*
9175  * Get line or list of lines from buffer "buf" into "rettv".
9176  * Return a range (from start to end) of lines in rettv from the specified
9177  * buffer.
9178  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9179  */
9180     static void
9181 get_buffer_lines(buf, start, end, retlist, rettv)
9182     buf_T	*buf;
9183     linenr_T	start;
9184     linenr_T	end;
9185     int		retlist;
9186     typval_T	*rettv;
9187 {
9188     char_u	*p;
9189     list_T	*l = NULL;
9190     listitem_T	*li;
9191 
9192     if (retlist)
9193     {
9194 	l = list_alloc();
9195 	if (l == NULL)
9196 	    return;
9197 
9198 	rettv->vval.v_list = l;
9199 	rettv->v_type = VAR_LIST;
9200 	++l->lv_refcount;
9201     }
9202     else
9203 	rettv->vval.v_number = 0;
9204 
9205     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9206 	return;
9207 
9208     if (!retlist)
9209     {
9210 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9211 	    p = ml_get_buf(buf, start, FALSE);
9212 	else
9213 	    p = (char_u *)"";
9214 
9215 	rettv->v_type = VAR_STRING;
9216 	rettv->vval.v_string = vim_strsave(p);
9217     }
9218     else
9219     {
9220 	if (end < start)
9221 	    return;
9222 
9223 	if (start < 1)
9224 	    start = 1;
9225 	if (end > buf->b_ml.ml_line_count)
9226 	    end = buf->b_ml.ml_line_count;
9227 	while (start <= end)
9228 	{
9229 	    li = listitem_alloc();
9230 	    if (li == NULL)
9231 		break;
9232 	    list_append(l, li);
9233 	    li->li_tv.v_type = VAR_STRING;
9234 	    li->li_tv.v_lock = 0;
9235 	    li->li_tv.vval.v_string =
9236 		vim_strsave(ml_get_buf(buf, start++, FALSE));
9237 	}
9238     }
9239 }
9240 
9241 /*
9242  * "getbufline()" function
9243  */
9244     static void
9245 f_getbufline(argvars, rettv)
9246     typval_T	*argvars;
9247     typval_T	*rettv;
9248 {
9249     linenr_T	lnum;
9250     linenr_T	end;
9251     buf_T	*buf;
9252 
9253     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9254     ++emsg_off;
9255     buf = get_buf_tv(&argvars[0]);
9256     --emsg_off;
9257 
9258     lnum = get_tv_lnum_buf(&argvars[1], buf);
9259     if (argvars[2].v_type == VAR_UNKNOWN)
9260 	end = lnum;
9261     else
9262 	end = get_tv_lnum_buf(&argvars[2], buf);
9263 
9264     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9265 }
9266 
9267 /*
9268  * "getbufvar()" function
9269  */
9270     static void
9271 f_getbufvar(argvars, rettv)
9272     typval_T	*argvars;
9273     typval_T	*rettv;
9274 {
9275     buf_T	*buf;
9276     buf_T	*save_curbuf;
9277     char_u	*varname;
9278     dictitem_T	*v;
9279 
9280     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9281     varname = get_tv_string_chk(&argvars[1]);
9282     ++emsg_off;
9283     buf = get_buf_tv(&argvars[0]);
9284 
9285     rettv->v_type = VAR_STRING;
9286     rettv->vval.v_string = NULL;
9287 
9288     if (buf != NULL && varname != NULL)
9289     {
9290 	if (*varname == '&')	/* buffer-local-option */
9291 	{
9292 	    /* set curbuf to be our buf, temporarily */
9293 	    save_curbuf = curbuf;
9294 	    curbuf = buf;
9295 
9296 	    get_option_tv(&varname, rettv, TRUE);
9297 
9298 	    /* restore previous notion of curbuf */
9299 	    curbuf = save_curbuf;
9300 	}
9301 	else
9302 	{
9303 	    if (*varname == NUL)
9304 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9305 		 * scope prefix before the NUL byte is required by
9306 		 * find_var_in_ht(). */
9307 		varname = (char_u *)"b:" + 2;
9308 	    /* look up the variable */
9309 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9310 	    if (v != NULL)
9311 		copy_tv(&v->di_tv, rettv);
9312 	}
9313     }
9314 
9315     --emsg_off;
9316 }
9317 
9318 /*
9319  * "getchar()" function
9320  */
9321     static void
9322 f_getchar(argvars, rettv)
9323     typval_T	*argvars;
9324     typval_T	*rettv;
9325 {
9326     varnumber_T		n;
9327     int			error = FALSE;
9328 
9329     ++no_mapping;
9330     ++allow_keys;
9331     if (argvars[0].v_type == VAR_UNKNOWN)
9332 	/* getchar(): blocking wait. */
9333 	n = safe_vgetc();
9334     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9335 	/* getchar(1): only check if char avail */
9336 	n = vpeekc();
9337     else if (error || vpeekc() == NUL)
9338 	/* illegal argument or getchar(0) and no char avail: return zero */
9339 	n = 0;
9340     else
9341 	/* getchar(0) and char avail: return char */
9342 	n = safe_vgetc();
9343     --no_mapping;
9344     --allow_keys;
9345 
9346     rettv->vval.v_number = n;
9347     if (IS_SPECIAL(n) || mod_mask != 0)
9348     {
9349 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9350 	int		i = 0;
9351 
9352 	/* Turn a special key into three bytes, plus modifier. */
9353 	if (mod_mask != 0)
9354 	{
9355 	    temp[i++] = K_SPECIAL;
9356 	    temp[i++] = KS_MODIFIER;
9357 	    temp[i++] = mod_mask;
9358 	}
9359 	if (IS_SPECIAL(n))
9360 	{
9361 	    temp[i++] = K_SPECIAL;
9362 	    temp[i++] = K_SECOND(n);
9363 	    temp[i++] = K_THIRD(n);
9364 	}
9365 #ifdef FEAT_MBYTE
9366 	else if (has_mbyte)
9367 	    i += (*mb_char2bytes)(n, temp + i);
9368 #endif
9369 	else
9370 	    temp[i++] = n;
9371 	temp[i++] = NUL;
9372 	rettv->v_type = VAR_STRING;
9373 	rettv->vval.v_string = vim_strsave(temp);
9374     }
9375 }
9376 
9377 /*
9378  * "getcharmod()" function
9379  */
9380 /*ARGSUSED*/
9381     static void
9382 f_getcharmod(argvars, rettv)
9383     typval_T	*argvars;
9384     typval_T	*rettv;
9385 {
9386     rettv->vval.v_number = mod_mask;
9387 }
9388 
9389 /*
9390  * "getcmdline()" function
9391  */
9392 /*ARGSUSED*/
9393     static void
9394 f_getcmdline(argvars, rettv)
9395     typval_T	*argvars;
9396     typval_T	*rettv;
9397 {
9398     rettv->v_type = VAR_STRING;
9399     rettv->vval.v_string = get_cmdline_str();
9400 }
9401 
9402 /*
9403  * "getcmdpos()" function
9404  */
9405 /*ARGSUSED*/
9406     static void
9407 f_getcmdpos(argvars, rettv)
9408     typval_T	*argvars;
9409     typval_T	*rettv;
9410 {
9411     rettv->vval.v_number = get_cmdline_pos() + 1;
9412 }
9413 
9414 /*
9415  * "getcwd()" function
9416  */
9417 /*ARGSUSED*/
9418     static void
9419 f_getcwd(argvars, rettv)
9420     typval_T	*argvars;
9421     typval_T	*rettv;
9422 {
9423     char_u	cwd[MAXPATHL];
9424 
9425     rettv->v_type = VAR_STRING;
9426     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9427 	rettv->vval.v_string = NULL;
9428     else
9429     {
9430 	rettv->vval.v_string = vim_strsave(cwd);
9431 #ifdef BACKSLASH_IN_FILENAME
9432 	if (rettv->vval.v_string != NULL)
9433 	    slash_adjust(rettv->vval.v_string);
9434 #endif
9435     }
9436 }
9437 
9438 /*
9439  * "getfontname()" function
9440  */
9441 /*ARGSUSED*/
9442     static void
9443 f_getfontname(argvars, rettv)
9444     typval_T	*argvars;
9445     typval_T	*rettv;
9446 {
9447     rettv->v_type = VAR_STRING;
9448     rettv->vval.v_string = NULL;
9449 #ifdef FEAT_GUI
9450     if (gui.in_use)
9451     {
9452 	GuiFont font;
9453 	char_u	*name = NULL;
9454 
9455 	if (argvars[0].v_type == VAR_UNKNOWN)
9456 	{
9457 	    /* Get the "Normal" font.  Either the name saved by
9458 	     * hl_set_font_name() or from the font ID. */
9459 	    font = gui.norm_font;
9460 	    name = hl_get_font_name();
9461 	}
9462 	else
9463 	{
9464 	    name = get_tv_string(&argvars[0]);
9465 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9466 		return;
9467 	    font = gui_mch_get_font(name, FALSE);
9468 	    if (font == NOFONT)
9469 		return;	    /* Invalid font name, return empty string. */
9470 	}
9471 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9472 	if (argvars[0].v_type != VAR_UNKNOWN)
9473 	    gui_mch_free_font(font);
9474     }
9475 #endif
9476 }
9477 
9478 /*
9479  * "getfperm({fname})" function
9480  */
9481     static void
9482 f_getfperm(argvars, rettv)
9483     typval_T	*argvars;
9484     typval_T	*rettv;
9485 {
9486     char_u	*fname;
9487     struct stat st;
9488     char_u	*perm = NULL;
9489     char_u	flags[] = "rwx";
9490     int		i;
9491 
9492     fname = get_tv_string(&argvars[0]);
9493 
9494     rettv->v_type = VAR_STRING;
9495     if (mch_stat((char *)fname, &st) >= 0)
9496     {
9497 	perm = vim_strsave((char_u *)"---------");
9498 	if (perm != NULL)
9499 	{
9500 	    for (i = 0; i < 9; i++)
9501 	    {
9502 		if (st.st_mode & (1 << (8 - i)))
9503 		    perm[i] = flags[i % 3];
9504 	    }
9505 	}
9506     }
9507     rettv->vval.v_string = perm;
9508 }
9509 
9510 /*
9511  * "getfsize({fname})" function
9512  */
9513     static void
9514 f_getfsize(argvars, rettv)
9515     typval_T	*argvars;
9516     typval_T	*rettv;
9517 {
9518     char_u	*fname;
9519     struct stat	st;
9520 
9521     fname = get_tv_string(&argvars[0]);
9522 
9523     rettv->v_type = VAR_NUMBER;
9524 
9525     if (mch_stat((char *)fname, &st) >= 0)
9526     {
9527 	if (mch_isdir(fname))
9528 	    rettv->vval.v_number = 0;
9529 	else
9530 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9531     }
9532     else
9533 	  rettv->vval.v_number = -1;
9534 }
9535 
9536 /*
9537  * "getftime({fname})" function
9538  */
9539     static void
9540 f_getftime(argvars, rettv)
9541     typval_T	*argvars;
9542     typval_T	*rettv;
9543 {
9544     char_u	*fname;
9545     struct stat	st;
9546 
9547     fname = get_tv_string(&argvars[0]);
9548 
9549     if (mch_stat((char *)fname, &st) >= 0)
9550 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9551     else
9552 	rettv->vval.v_number = -1;
9553 }
9554 
9555 /*
9556  * "getftype({fname})" function
9557  */
9558     static void
9559 f_getftype(argvars, rettv)
9560     typval_T	*argvars;
9561     typval_T	*rettv;
9562 {
9563     char_u	*fname;
9564     struct stat st;
9565     char_u	*type = NULL;
9566     char	*t;
9567 
9568     fname = get_tv_string(&argvars[0]);
9569 
9570     rettv->v_type = VAR_STRING;
9571     if (mch_lstat((char *)fname, &st) >= 0)
9572     {
9573 #ifdef S_ISREG
9574 	if (S_ISREG(st.st_mode))
9575 	    t = "file";
9576 	else if (S_ISDIR(st.st_mode))
9577 	    t = "dir";
9578 # ifdef S_ISLNK
9579 	else if (S_ISLNK(st.st_mode))
9580 	    t = "link";
9581 # endif
9582 # ifdef S_ISBLK
9583 	else if (S_ISBLK(st.st_mode))
9584 	    t = "bdev";
9585 # endif
9586 # ifdef S_ISCHR
9587 	else if (S_ISCHR(st.st_mode))
9588 	    t = "cdev";
9589 # endif
9590 # ifdef S_ISFIFO
9591 	else if (S_ISFIFO(st.st_mode))
9592 	    t = "fifo";
9593 # endif
9594 # ifdef S_ISSOCK
9595 	else if (S_ISSOCK(st.st_mode))
9596 	    t = "fifo";
9597 # endif
9598 	else
9599 	    t = "other";
9600 #else
9601 # ifdef S_IFMT
9602 	switch (st.st_mode & S_IFMT)
9603 	{
9604 	    case S_IFREG: t = "file"; break;
9605 	    case S_IFDIR: t = "dir"; break;
9606 #  ifdef S_IFLNK
9607 	    case S_IFLNK: t = "link"; break;
9608 #  endif
9609 #  ifdef S_IFBLK
9610 	    case S_IFBLK: t = "bdev"; break;
9611 #  endif
9612 #  ifdef S_IFCHR
9613 	    case S_IFCHR: t = "cdev"; break;
9614 #  endif
9615 #  ifdef S_IFIFO
9616 	    case S_IFIFO: t = "fifo"; break;
9617 #  endif
9618 #  ifdef S_IFSOCK
9619 	    case S_IFSOCK: t = "socket"; break;
9620 #  endif
9621 	    default: t = "other";
9622 	}
9623 # else
9624 	if (mch_isdir(fname))
9625 	    t = "dir";
9626 	else
9627 	    t = "file";
9628 # endif
9629 #endif
9630 	type = vim_strsave((char_u *)t);
9631     }
9632     rettv->vval.v_string = type;
9633 }
9634 
9635 /*
9636  * "getline(lnum, [end])" function
9637  */
9638     static void
9639 f_getline(argvars, rettv)
9640     typval_T	*argvars;
9641     typval_T	*rettv;
9642 {
9643     linenr_T	lnum;
9644     linenr_T	end;
9645     int		retlist;
9646 
9647     lnum = get_tv_lnum(argvars);
9648     if (argvars[1].v_type == VAR_UNKNOWN)
9649     {
9650 	end = 0;
9651 	retlist = FALSE;
9652     }
9653     else
9654     {
9655 	end = get_tv_lnum(&argvars[1]);
9656 	retlist = TRUE;
9657     }
9658 
9659     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9660 }
9661 
9662 /*
9663  * "getqflist()" function
9664  */
9665 /*ARGSUSED*/
9666     static void
9667 f_getqflist(argvars, rettv)
9668     typval_T	*argvars;
9669     typval_T	*rettv;
9670 {
9671 #ifdef FEAT_QUICKFIX
9672     list_T	*l;
9673 #endif
9674 
9675     rettv->vval.v_number = FALSE;
9676 #ifdef FEAT_QUICKFIX
9677     l = list_alloc();
9678     if (l != NULL)
9679     {
9680 	if (get_errorlist(l) != FAIL)
9681 	{
9682 	    rettv->vval.v_list = l;
9683 	    rettv->v_type = VAR_LIST;
9684 	    ++l->lv_refcount;
9685 	}
9686 	else
9687 	    list_free(l);
9688     }
9689 #endif
9690 }
9691 
9692 /*
9693  * "getreg()" function
9694  */
9695     static void
9696 f_getreg(argvars, rettv)
9697     typval_T	*argvars;
9698     typval_T	*rettv;
9699 {
9700     char_u	*strregname;
9701     int		regname;
9702     int		arg2 = FALSE;
9703     int		error = FALSE;
9704 
9705     if (argvars[0].v_type != VAR_UNKNOWN)
9706     {
9707 	strregname = get_tv_string_chk(&argvars[0]);
9708 	error = strregname == NULL;
9709 	if (argvars[1].v_type != VAR_UNKNOWN)
9710 	    arg2 = get_tv_number_chk(&argvars[1], &error);
9711     }
9712     else
9713 	strregname = vimvars[VV_REG].vv_str;
9714     regname = (strregname == NULL ? '"' : *strregname);
9715     if (regname == 0)
9716 	regname = '"';
9717 
9718     rettv->v_type = VAR_STRING;
9719     rettv->vval.v_string = error ? NULL :
9720 				    get_reg_contents(regname, TRUE, arg2);
9721 }
9722 
9723 /*
9724  * "getregtype()" function
9725  */
9726     static void
9727 f_getregtype(argvars, rettv)
9728     typval_T	*argvars;
9729     typval_T	*rettv;
9730 {
9731     char_u	*strregname;
9732     int		regname;
9733     char_u	buf[NUMBUFLEN + 2];
9734     long	reglen = 0;
9735 
9736     if (argvars[0].v_type != VAR_UNKNOWN)
9737     {
9738 	strregname = get_tv_string_chk(&argvars[0]);
9739 	if (strregname == NULL)	    /* type error; errmsg already given */
9740 	{
9741 	    rettv->v_type = VAR_STRING;
9742 	    rettv->vval.v_string = NULL;
9743 	    return;
9744 	}
9745     }
9746     else
9747 	/* Default to v:register */
9748 	strregname = vimvars[VV_REG].vv_str;
9749 
9750     regname = (strregname == NULL ? '"' : *strregname);
9751     if (regname == 0)
9752 	regname = '"';
9753 
9754     buf[0] = NUL;
9755     buf[1] = NUL;
9756     switch (get_reg_type(regname, &reglen))
9757     {
9758 	case MLINE: buf[0] = 'V'; break;
9759 	case MCHAR: buf[0] = 'v'; break;
9760 #ifdef FEAT_VISUAL
9761 	case MBLOCK:
9762 		buf[0] = Ctrl_V;
9763 		sprintf((char *)buf + 1, "%ld", reglen + 1);
9764 		break;
9765 #endif
9766     }
9767     rettv->v_type = VAR_STRING;
9768     rettv->vval.v_string = vim_strsave(buf);
9769 }
9770 
9771 /*
9772  * "getwinposx()" function
9773  */
9774 /*ARGSUSED*/
9775     static void
9776 f_getwinposx(argvars, rettv)
9777     typval_T	*argvars;
9778     typval_T	*rettv;
9779 {
9780     rettv->vval.v_number = -1;
9781 #ifdef FEAT_GUI
9782     if (gui.in_use)
9783     {
9784 	int	    x, y;
9785 
9786 	if (gui_mch_get_winpos(&x, &y) == OK)
9787 	    rettv->vval.v_number = x;
9788     }
9789 #endif
9790 }
9791 
9792 /*
9793  * "getwinposy()" function
9794  */
9795 /*ARGSUSED*/
9796     static void
9797 f_getwinposy(argvars, rettv)
9798     typval_T	*argvars;
9799     typval_T	*rettv;
9800 {
9801     rettv->vval.v_number = -1;
9802 #ifdef FEAT_GUI
9803     if (gui.in_use)
9804     {
9805 	int	    x, y;
9806 
9807 	if (gui_mch_get_winpos(&x, &y) == OK)
9808 	    rettv->vval.v_number = y;
9809     }
9810 #endif
9811 }
9812 
9813 static win_T *find_win_by_nr __ARGS((typval_T *vp));
9814 
9815     static win_T *
9816 find_win_by_nr(vp)
9817     typval_T	*vp;
9818 {
9819 #ifdef FEAT_WINDOWS
9820     win_T	*wp;
9821 #endif
9822     int		nr;
9823 
9824     nr = get_tv_number_chk(vp, NULL);
9825 
9826 #ifdef FEAT_WINDOWS
9827     if (nr < 0)
9828 	return NULL;
9829     if (nr == 0)
9830 	return curwin;
9831 
9832     for (wp = firstwin; wp != NULL; wp = wp->w_next)
9833 	if (--nr <= 0)
9834 	    break;
9835     return wp;
9836 #else
9837     if (nr == 0 || nr == 1)
9838 	return curwin;
9839     return NULL;
9840 #endif
9841 }
9842 
9843 /*
9844  * "getwinvar()" function
9845  */
9846     static void
9847 f_getwinvar(argvars, rettv)
9848     typval_T	*argvars;
9849     typval_T	*rettv;
9850 {
9851     win_T	*win, *oldcurwin;
9852     char_u	*varname;
9853     dictitem_T	*v;
9854 
9855     win = find_win_by_nr(&argvars[0]);
9856     varname = get_tv_string_chk(&argvars[1]);
9857     ++emsg_off;
9858 
9859     rettv->v_type = VAR_STRING;
9860     rettv->vval.v_string = NULL;
9861 
9862     if (win != NULL && varname != NULL)
9863     {
9864 	if (*varname == '&')	/* window-local-option */
9865 	{
9866 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
9867 	     * that we can get buffer-local options. */
9868 	    oldcurwin = curwin;
9869 	    curwin = win;
9870 	    curbuf = win->w_buffer;
9871 
9872 	    get_option_tv(&varname, rettv, 1);
9873 
9874 	    /* restore previous notion of curwin */
9875 	    curwin = oldcurwin;
9876 	    curbuf = curwin->w_buffer;
9877 	}
9878 	else
9879 	{
9880 	    if (*varname == NUL)
9881 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
9882 		 * scope prefix before the NUL byte is required by
9883 		 * find_var_in_ht(). */
9884 		varname = (char_u *)"w:" + 2;
9885 	    /* look up the variable */
9886 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
9887 	    if (v != NULL)
9888 		copy_tv(&v->di_tv, rettv);
9889 	}
9890     }
9891 
9892     --emsg_off;
9893 }
9894 
9895 /*
9896  * "glob()" function
9897  */
9898     static void
9899 f_glob(argvars, rettv)
9900     typval_T	*argvars;
9901     typval_T	*rettv;
9902 {
9903     expand_T	xpc;
9904 
9905     ExpandInit(&xpc);
9906     xpc.xp_context = EXPAND_FILES;
9907     rettv->v_type = VAR_STRING;
9908     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
9909 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
9910     ExpandCleanup(&xpc);
9911 }
9912 
9913 /*
9914  * "globpath()" function
9915  */
9916     static void
9917 f_globpath(argvars, rettv)
9918     typval_T	*argvars;
9919     typval_T	*rettv;
9920 {
9921     char_u	buf1[NUMBUFLEN];
9922     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
9923 
9924     rettv->v_type = VAR_STRING;
9925     if (file == NULL)
9926 	rettv->vval.v_string = NULL;
9927     else
9928 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
9929 }
9930 
9931 /*
9932  * "has()" function
9933  */
9934     static void
9935 f_has(argvars, rettv)
9936     typval_T	*argvars;
9937     typval_T	*rettv;
9938 {
9939     int		i;
9940     char_u	*name;
9941     int		n = FALSE;
9942     static char	*(has_list[]) =
9943     {
9944 #ifdef AMIGA
9945 	"amiga",
9946 # ifdef FEAT_ARP
9947 	"arp",
9948 # endif
9949 #endif
9950 #ifdef __BEOS__
9951 	"beos",
9952 #endif
9953 #ifdef MSDOS
9954 # ifdef DJGPP
9955 	"dos32",
9956 # else
9957 	"dos16",
9958 # endif
9959 #endif
9960 #ifdef MACOS /* TODO: Should we add MACOS_CLASSIC, MACOS_X? (Dany) */
9961 	"mac",
9962 #endif
9963 #if defined(MACOS_X_UNIX)
9964 	"macunix",
9965 #endif
9966 #ifdef OS2
9967 	"os2",
9968 #endif
9969 #ifdef __QNX__
9970 	"qnx",
9971 #endif
9972 #ifdef RISCOS
9973 	"riscos",
9974 #endif
9975 #ifdef UNIX
9976 	"unix",
9977 #endif
9978 #ifdef VMS
9979 	"vms",
9980 #endif
9981 #ifdef WIN16
9982 	"win16",
9983 #endif
9984 #ifdef WIN32
9985 	"win32",
9986 #endif
9987 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
9988 	"win32unix",
9989 #endif
9990 #ifdef WIN64
9991 	"win64",
9992 #endif
9993 #ifdef EBCDIC
9994 	"ebcdic",
9995 #endif
9996 #ifndef CASE_INSENSITIVE_FILENAME
9997 	"fname_case",
9998 #endif
9999 #ifdef FEAT_ARABIC
10000 	"arabic",
10001 #endif
10002 #ifdef FEAT_AUTOCMD
10003 	"autocmd",
10004 #endif
10005 #ifdef FEAT_BEVAL
10006 	"balloon_eval",
10007 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10008 	"balloon_multiline",
10009 # endif
10010 #endif
10011 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10012 	"builtin_terms",
10013 # ifdef ALL_BUILTIN_TCAPS
10014 	"all_builtin_terms",
10015 # endif
10016 #endif
10017 #ifdef FEAT_BYTEOFF
10018 	"byte_offset",
10019 #endif
10020 #ifdef FEAT_CINDENT
10021 	"cindent",
10022 #endif
10023 #ifdef FEAT_CLIENTSERVER
10024 	"clientserver",
10025 #endif
10026 #ifdef FEAT_CLIPBOARD
10027 	"clipboard",
10028 #endif
10029 #ifdef FEAT_CMDL_COMPL
10030 	"cmdline_compl",
10031 #endif
10032 #ifdef FEAT_CMDHIST
10033 	"cmdline_hist",
10034 #endif
10035 #ifdef FEAT_COMMENTS
10036 	"comments",
10037 #endif
10038 #ifdef FEAT_CRYPT
10039 	"cryptv",
10040 #endif
10041 #ifdef FEAT_CSCOPE
10042 	"cscope",
10043 #endif
10044 #ifdef DEBUG
10045 	"debug",
10046 #endif
10047 #ifdef FEAT_CON_DIALOG
10048 	"dialog_con",
10049 #endif
10050 #ifdef FEAT_GUI_DIALOG
10051 	"dialog_gui",
10052 #endif
10053 #ifdef FEAT_DIFF
10054 	"diff",
10055 #endif
10056 #ifdef FEAT_DIGRAPHS
10057 	"digraphs",
10058 #endif
10059 #ifdef FEAT_DND
10060 	"dnd",
10061 #endif
10062 #ifdef FEAT_EMACS_TAGS
10063 	"emacs_tags",
10064 #endif
10065 	"eval",	    /* always present, of course! */
10066 #ifdef FEAT_EX_EXTRA
10067 	"ex_extra",
10068 #endif
10069 #ifdef FEAT_SEARCH_EXTRA
10070 	"extra_search",
10071 #endif
10072 #ifdef FEAT_FKMAP
10073 	"farsi",
10074 #endif
10075 #ifdef FEAT_SEARCHPATH
10076 	"file_in_path",
10077 #endif
10078 #if defined(UNIX) && !defined(USE_SYSTEM)
10079 	"filterpipe",
10080 #endif
10081 #ifdef FEAT_FIND_ID
10082 	"find_in_path",
10083 #endif
10084 #ifdef FEAT_FOLDING
10085 	"folding",
10086 #endif
10087 #ifdef FEAT_FOOTER
10088 	"footer",
10089 #endif
10090 #if !defined(USE_SYSTEM) && defined(UNIX)
10091 	"fork",
10092 #endif
10093 #ifdef FEAT_GETTEXT
10094 	"gettext",
10095 #endif
10096 #ifdef FEAT_GUI
10097 	"gui",
10098 #endif
10099 #ifdef FEAT_GUI_ATHENA
10100 # ifdef FEAT_GUI_NEXTAW
10101 	"gui_neXtaw",
10102 # else
10103 	"gui_athena",
10104 # endif
10105 #endif
10106 #ifdef FEAT_GUI_KDE
10107 	"gui_kde",
10108 #endif
10109 #ifdef FEAT_GUI_GTK
10110 	"gui_gtk",
10111 # ifdef HAVE_GTK2
10112 	"gui_gtk2",
10113 # endif
10114 #endif
10115 #ifdef FEAT_GUI_MAC
10116 	"gui_mac",
10117 #endif
10118 #ifdef FEAT_GUI_MOTIF
10119 	"gui_motif",
10120 #endif
10121 #ifdef FEAT_GUI_PHOTON
10122 	"gui_photon",
10123 #endif
10124 #ifdef FEAT_GUI_W16
10125 	"gui_win16",
10126 #endif
10127 #ifdef FEAT_GUI_W32
10128 	"gui_win32",
10129 #endif
10130 #ifdef FEAT_HANGULIN
10131 	"hangul_input",
10132 #endif
10133 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10134 	"iconv",
10135 #endif
10136 #ifdef FEAT_INS_EXPAND
10137 	"insert_expand",
10138 #endif
10139 #ifdef FEAT_JUMPLIST
10140 	"jumplist",
10141 #endif
10142 #ifdef FEAT_KEYMAP
10143 	"keymap",
10144 #endif
10145 #ifdef FEAT_LANGMAP
10146 	"langmap",
10147 #endif
10148 #ifdef FEAT_LIBCALL
10149 	"libcall",
10150 #endif
10151 #ifdef FEAT_LINEBREAK
10152 	"linebreak",
10153 #endif
10154 #ifdef FEAT_LISP
10155 	"lispindent",
10156 #endif
10157 #ifdef FEAT_LISTCMDS
10158 	"listcmds",
10159 #endif
10160 #ifdef FEAT_LOCALMAP
10161 	"localmap",
10162 #endif
10163 #ifdef FEAT_MENU
10164 	"menu",
10165 #endif
10166 #ifdef FEAT_SESSION
10167 	"mksession",
10168 #endif
10169 #ifdef FEAT_MODIFY_FNAME
10170 	"modify_fname",
10171 #endif
10172 #ifdef FEAT_MOUSE
10173 	"mouse",
10174 #endif
10175 #ifdef FEAT_MOUSESHAPE
10176 	"mouseshape",
10177 #endif
10178 #if defined(UNIX) || defined(VMS)
10179 # ifdef FEAT_MOUSE_DEC
10180 	"mouse_dec",
10181 # endif
10182 # ifdef FEAT_MOUSE_GPM
10183 	"mouse_gpm",
10184 # endif
10185 # ifdef FEAT_MOUSE_JSB
10186 	"mouse_jsbterm",
10187 # endif
10188 # ifdef FEAT_MOUSE_NET
10189 	"mouse_netterm",
10190 # endif
10191 # ifdef FEAT_MOUSE_PTERM
10192 	"mouse_pterm",
10193 # endif
10194 # ifdef FEAT_MOUSE_XTERM
10195 	"mouse_xterm",
10196 # endif
10197 #endif
10198 #ifdef FEAT_MBYTE
10199 	"multi_byte",
10200 #endif
10201 #ifdef FEAT_MBYTE_IME
10202 	"multi_byte_ime",
10203 #endif
10204 #ifdef FEAT_MULTI_LANG
10205 	"multi_lang",
10206 #endif
10207 #ifdef FEAT_MZSCHEME
10208 #ifndef DYNAMIC_MZSCHEME
10209 	"mzscheme",
10210 #endif
10211 #endif
10212 #ifdef FEAT_OLE
10213 	"ole",
10214 #endif
10215 #ifdef FEAT_OSFILETYPE
10216 	"osfiletype",
10217 #endif
10218 #ifdef FEAT_PATH_EXTRA
10219 	"path_extra",
10220 #endif
10221 #ifdef FEAT_PERL
10222 #ifndef DYNAMIC_PERL
10223 	"perl",
10224 #endif
10225 #endif
10226 #ifdef FEAT_PYTHON
10227 #ifndef DYNAMIC_PYTHON
10228 	"python",
10229 #endif
10230 #endif
10231 #ifdef FEAT_POSTSCRIPT
10232 	"postscript",
10233 #endif
10234 #ifdef FEAT_PRINTER
10235 	"printer",
10236 #endif
10237 #ifdef FEAT_PROFILE
10238 	"profile",
10239 #endif
10240 #ifdef FEAT_QUICKFIX
10241 	"quickfix",
10242 #endif
10243 #ifdef FEAT_RIGHTLEFT
10244 	"rightleft",
10245 #endif
10246 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10247 	"ruby",
10248 #endif
10249 #ifdef FEAT_SCROLLBIND
10250 	"scrollbind",
10251 #endif
10252 #ifdef FEAT_CMDL_INFO
10253 	"showcmd",
10254 	"cmdline_info",
10255 #endif
10256 #ifdef FEAT_SIGNS
10257 	"signs",
10258 #endif
10259 #ifdef FEAT_SMARTINDENT
10260 	"smartindent",
10261 #endif
10262 #ifdef FEAT_SNIFF
10263 	"sniff",
10264 #endif
10265 #ifdef FEAT_STL_OPT
10266 	"statusline",
10267 #endif
10268 #ifdef FEAT_SUN_WORKSHOP
10269 	"sun_workshop",
10270 #endif
10271 #ifdef FEAT_NETBEANS_INTG
10272 	"netbeans_intg",
10273 #endif
10274 #ifdef FEAT_SYN_HL
10275 	"spell",
10276 #endif
10277 #ifdef FEAT_SYN_HL
10278 	"syntax",
10279 #endif
10280 #if defined(USE_SYSTEM) || !defined(UNIX)
10281 	"system",
10282 #endif
10283 #ifdef FEAT_TAG_BINS
10284 	"tag_binary",
10285 #endif
10286 #ifdef FEAT_TAG_OLDSTATIC
10287 	"tag_old_static",
10288 #endif
10289 #ifdef FEAT_TAG_ANYWHITE
10290 	"tag_any_white",
10291 #endif
10292 #ifdef FEAT_TCL
10293 # ifndef DYNAMIC_TCL
10294 	"tcl",
10295 # endif
10296 #endif
10297 #ifdef TERMINFO
10298 	"terminfo",
10299 #endif
10300 #ifdef FEAT_TERMRESPONSE
10301 	"termresponse",
10302 #endif
10303 #ifdef FEAT_TEXTOBJ
10304 	"textobjects",
10305 #endif
10306 #ifdef HAVE_TGETENT
10307 	"tgetent",
10308 #endif
10309 #ifdef FEAT_TITLE
10310 	"title",
10311 #endif
10312 #ifdef FEAT_TOOLBAR
10313 	"toolbar",
10314 #endif
10315 #ifdef FEAT_USR_CMDS
10316 	"user-commands",    /* was accidentally included in 5.4 */
10317 	"user_commands",
10318 #endif
10319 #ifdef FEAT_VIMINFO
10320 	"viminfo",
10321 #endif
10322 #ifdef FEAT_VERTSPLIT
10323 	"vertsplit",
10324 #endif
10325 #ifdef FEAT_VIRTUALEDIT
10326 	"virtualedit",
10327 #endif
10328 #ifdef FEAT_VISUAL
10329 	"visual",
10330 #endif
10331 #ifdef FEAT_VISUALEXTRA
10332 	"visualextra",
10333 #endif
10334 #ifdef FEAT_VREPLACE
10335 	"vreplace",
10336 #endif
10337 #ifdef FEAT_WILDIGN
10338 	"wildignore",
10339 #endif
10340 #ifdef FEAT_WILDMENU
10341 	"wildmenu",
10342 #endif
10343 #ifdef FEAT_WINDOWS
10344 	"windows",
10345 #endif
10346 #ifdef FEAT_WAK
10347 	"winaltkeys",
10348 #endif
10349 #ifdef FEAT_WRITEBACKUP
10350 	"writebackup",
10351 #endif
10352 #ifdef FEAT_XIM
10353 	"xim",
10354 #endif
10355 #ifdef FEAT_XFONTSET
10356 	"xfontset",
10357 #endif
10358 #ifdef USE_XSMP
10359 	"xsmp",
10360 #endif
10361 #ifdef USE_XSMP_INTERACT
10362 	"xsmp_interact",
10363 #endif
10364 #ifdef FEAT_XCLIPBOARD
10365 	"xterm_clipboard",
10366 #endif
10367 #ifdef FEAT_XTERM_SAVE
10368 	"xterm_save",
10369 #endif
10370 #if defined(UNIX) && defined(FEAT_X11)
10371 	"X11",
10372 #endif
10373 	NULL
10374     };
10375 
10376     name = get_tv_string(&argvars[0]);
10377     for (i = 0; has_list[i] != NULL; ++i)
10378 	if (STRICMP(name, has_list[i]) == 0)
10379 	{
10380 	    n = TRUE;
10381 	    break;
10382 	}
10383 
10384     if (n == FALSE)
10385     {
10386 	if (STRNICMP(name, "patch", 5) == 0)
10387 	    n = has_patch(atoi((char *)name + 5));
10388 	else if (STRICMP(name, "vim_starting") == 0)
10389 	    n = (starting != 0);
10390 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10391 	else if (STRICMP(name, "balloon_multiline") == 0)
10392 	    n = multiline_balloon_available();
10393 #endif
10394 #ifdef DYNAMIC_TCL
10395 	else if (STRICMP(name, "tcl") == 0)
10396 	    n = tcl_enabled(FALSE);
10397 #endif
10398 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10399 	else if (STRICMP(name, "iconv") == 0)
10400 	    n = iconv_enabled(FALSE);
10401 #endif
10402 #ifdef DYNAMIC_MZSCHEME
10403 	else if (STRICMP(name, "mzscheme") == 0)
10404 	    n = mzscheme_enabled(FALSE);
10405 #endif
10406 #ifdef DYNAMIC_RUBY
10407 	else if (STRICMP(name, "ruby") == 0)
10408 	    n = ruby_enabled(FALSE);
10409 #endif
10410 #ifdef DYNAMIC_PYTHON
10411 	else if (STRICMP(name, "python") == 0)
10412 	    n = python_enabled(FALSE);
10413 #endif
10414 #ifdef DYNAMIC_PERL
10415 	else if (STRICMP(name, "perl") == 0)
10416 	    n = perl_enabled(FALSE);
10417 #endif
10418 #ifdef FEAT_GUI
10419 	else if (STRICMP(name, "gui_running") == 0)
10420 	    n = (gui.in_use || gui.starting);
10421 # ifdef FEAT_GUI_W32
10422 	else if (STRICMP(name, "gui_win32s") == 0)
10423 	    n = gui_is_win32s();
10424 # endif
10425 # ifdef FEAT_BROWSE
10426 	else if (STRICMP(name, "browse") == 0)
10427 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10428 # endif
10429 #endif
10430 #ifdef FEAT_SYN_HL
10431 	else if (STRICMP(name, "syntax_items") == 0)
10432 	    n = syntax_present(curbuf);
10433 #endif
10434 #if defined(WIN3264)
10435 	else if (STRICMP(name, "win95") == 0)
10436 	    n = mch_windows95();
10437 #endif
10438 #ifdef FEAT_NETBEANS_INTG
10439 	else if (STRICMP(name, "netbeans_enabled") == 0)
10440 	    n = usingNetbeans;
10441 #endif
10442     }
10443 
10444     rettv->vval.v_number = n;
10445 }
10446 
10447 /*
10448  * "has_key()" function
10449  */
10450     static void
10451 f_has_key(argvars, rettv)
10452     typval_T	*argvars;
10453     typval_T	*rettv;
10454 {
10455     rettv->vval.v_number = 0;
10456     if (argvars[0].v_type != VAR_DICT)
10457     {
10458 	EMSG(_(e_dictreq));
10459 	return;
10460     }
10461     if (argvars[0].vval.v_dict == NULL)
10462 	return;
10463 
10464     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10465 				      get_tv_string(&argvars[1]), -1) != NULL;
10466 }
10467 
10468 /*
10469  * "hasmapto()" function
10470  */
10471     static void
10472 f_hasmapto(argvars, rettv)
10473     typval_T	*argvars;
10474     typval_T	*rettv;
10475 {
10476     char_u	*name;
10477     char_u	*mode;
10478     char_u	buf[NUMBUFLEN];
10479 
10480     name = get_tv_string(&argvars[0]);
10481     if (argvars[1].v_type == VAR_UNKNOWN)
10482 	mode = (char_u *)"nvo";
10483     else
10484 	mode = get_tv_string_buf(&argvars[1], buf);
10485 
10486     if (map_to_exists(name, mode))
10487 	rettv->vval.v_number = TRUE;
10488     else
10489 	rettv->vval.v_number = FALSE;
10490 }
10491 
10492 /*
10493  * "histadd()" function
10494  */
10495 /*ARGSUSED*/
10496     static void
10497 f_histadd(argvars, rettv)
10498     typval_T	*argvars;
10499     typval_T	*rettv;
10500 {
10501 #ifdef FEAT_CMDHIST
10502     int		histype;
10503     char_u	*str;
10504     char_u	buf[NUMBUFLEN];
10505 #endif
10506 
10507     rettv->vval.v_number = FALSE;
10508     if (check_restricted() || check_secure())
10509 	return;
10510 #ifdef FEAT_CMDHIST
10511     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10512     histype = str != NULL ? get_histtype(str) : -1;
10513     if (histype >= 0)
10514     {
10515 	str = get_tv_string_buf(&argvars[1], buf);
10516 	if (*str != NUL)
10517 	{
10518 	    add_to_history(histype, str, FALSE, NUL);
10519 	    rettv->vval.v_number = TRUE;
10520 	    return;
10521 	}
10522     }
10523 #endif
10524 }
10525 
10526 /*
10527  * "histdel()" function
10528  */
10529 /*ARGSUSED*/
10530     static void
10531 f_histdel(argvars, rettv)
10532     typval_T	*argvars;
10533     typval_T	*rettv;
10534 {
10535 #ifdef FEAT_CMDHIST
10536     int		n;
10537     char_u	buf[NUMBUFLEN];
10538     char_u	*str;
10539 
10540     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10541     if (str == NULL)
10542 	n = 0;
10543     else if (argvars[1].v_type == VAR_UNKNOWN)
10544 	/* only one argument: clear entire history */
10545 	n = clr_history(get_histtype(str));
10546     else if (argvars[1].v_type == VAR_NUMBER)
10547 	/* index given: remove that entry */
10548 	n = del_history_idx(get_histtype(str),
10549 					  (int)get_tv_number(&argvars[1]));
10550     else
10551 	/* string given: remove all matching entries */
10552 	n = del_history_entry(get_histtype(str),
10553 				      get_tv_string_buf(&argvars[1], buf));
10554     rettv->vval.v_number = n;
10555 #else
10556     rettv->vval.v_number = 0;
10557 #endif
10558 }
10559 
10560 /*
10561  * "histget()" function
10562  */
10563 /*ARGSUSED*/
10564     static void
10565 f_histget(argvars, rettv)
10566     typval_T	*argvars;
10567     typval_T	*rettv;
10568 {
10569 #ifdef FEAT_CMDHIST
10570     int		type;
10571     int		idx;
10572     char_u	*str;
10573 
10574     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10575     if (str == NULL)
10576 	rettv->vval.v_string = NULL;
10577     else
10578     {
10579 	type = get_histtype(str);
10580 	if (argvars[1].v_type == VAR_UNKNOWN)
10581 	    idx = get_history_idx(type);
10582 	else
10583 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10584 						    /* -1 on type error */
10585 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10586     }
10587 #else
10588     rettv->vval.v_string = NULL;
10589 #endif
10590     rettv->v_type = VAR_STRING;
10591 }
10592 
10593 /*
10594  * "histnr()" function
10595  */
10596 /*ARGSUSED*/
10597     static void
10598 f_histnr(argvars, rettv)
10599     typval_T	*argvars;
10600     typval_T	*rettv;
10601 {
10602     int		i;
10603 
10604 #ifdef FEAT_CMDHIST
10605     char_u	*history = get_tv_string_chk(&argvars[0]);
10606 
10607     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10608     if (i >= HIST_CMD && i < HIST_COUNT)
10609 	i = get_history_idx(i);
10610     else
10611 #endif
10612 	i = -1;
10613     rettv->vval.v_number = i;
10614 }
10615 
10616 /*
10617  * "highlightID(name)" function
10618  */
10619     static void
10620 f_hlID(argvars, rettv)
10621     typval_T	*argvars;
10622     typval_T	*rettv;
10623 {
10624     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10625 }
10626 
10627 /*
10628  * "highlight_exists()" function
10629  */
10630     static void
10631 f_hlexists(argvars, rettv)
10632     typval_T	*argvars;
10633     typval_T	*rettv;
10634 {
10635     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10636 }
10637 
10638 /*
10639  * "hostname()" function
10640  */
10641 /*ARGSUSED*/
10642     static void
10643 f_hostname(argvars, rettv)
10644     typval_T	*argvars;
10645     typval_T	*rettv;
10646 {
10647     char_u hostname[256];
10648 
10649     mch_get_host_name(hostname, 256);
10650     rettv->v_type = VAR_STRING;
10651     rettv->vval.v_string = vim_strsave(hostname);
10652 }
10653 
10654 /*
10655  * iconv() function
10656  */
10657 /*ARGSUSED*/
10658     static void
10659 f_iconv(argvars, rettv)
10660     typval_T	*argvars;
10661     typval_T	*rettv;
10662 {
10663 #ifdef FEAT_MBYTE
10664     char_u	buf1[NUMBUFLEN];
10665     char_u	buf2[NUMBUFLEN];
10666     char_u	*from, *to, *str;
10667     vimconv_T	vimconv;
10668 #endif
10669 
10670     rettv->v_type = VAR_STRING;
10671     rettv->vval.v_string = NULL;
10672 
10673 #ifdef FEAT_MBYTE
10674     str = get_tv_string(&argvars[0]);
10675     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10676     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10677     vimconv.vc_type = CONV_NONE;
10678     convert_setup(&vimconv, from, to);
10679 
10680     /* If the encodings are equal, no conversion needed. */
10681     if (vimconv.vc_type == CONV_NONE)
10682 	rettv->vval.v_string = vim_strsave(str);
10683     else
10684 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10685 
10686     convert_setup(&vimconv, NULL, NULL);
10687     vim_free(from);
10688     vim_free(to);
10689 #endif
10690 }
10691 
10692 /*
10693  * "indent()" function
10694  */
10695     static void
10696 f_indent(argvars, rettv)
10697     typval_T	*argvars;
10698     typval_T	*rettv;
10699 {
10700     linenr_T	lnum;
10701 
10702     lnum = get_tv_lnum(argvars);
10703     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10704 	rettv->vval.v_number = get_indent_lnum(lnum);
10705     else
10706 	rettv->vval.v_number = -1;
10707 }
10708 
10709 /*
10710  * "index()" function
10711  */
10712     static void
10713 f_index(argvars, rettv)
10714     typval_T	*argvars;
10715     typval_T	*rettv;
10716 {
10717     list_T	*l;
10718     listitem_T	*item;
10719     long	idx = 0;
10720     int		ic = FALSE;
10721 
10722     rettv->vval.v_number = -1;
10723     if (argvars[0].v_type != VAR_LIST)
10724     {
10725 	EMSG(_(e_listreq));
10726 	return;
10727     }
10728     l = argvars[0].vval.v_list;
10729     if (l != NULL)
10730     {
10731 	item = l->lv_first;
10732 	if (argvars[2].v_type != VAR_UNKNOWN)
10733 	{
10734 	    int		error = FALSE;
10735 
10736 	    /* Start at specified item.  Use the cached index that list_find()
10737 	     * sets, so that a negative number also works. */
10738 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10739 	    idx = l->lv_idx;
10740 	    if (argvars[3].v_type != VAR_UNKNOWN)
10741 		ic = get_tv_number_chk(&argvars[3], &error);
10742 	    if (error)
10743 		item = NULL;
10744 	}
10745 
10746 	for ( ; item != NULL; item = item->li_next, ++idx)
10747 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10748 	    {
10749 		rettv->vval.v_number = idx;
10750 		break;
10751 	    }
10752     }
10753 }
10754 
10755 static int inputsecret_flag = 0;
10756 
10757 /*
10758  * "input()" function
10759  *     Also handles inputsecret() when inputsecret is set.
10760  */
10761     static void
10762 f_input(argvars, rettv)
10763     typval_T	*argvars;
10764     typval_T	*rettv;
10765 {
10766     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10767     char_u	*p = NULL;
10768     int		c;
10769     char_u	buf[NUMBUFLEN];
10770     int		cmd_silent_save = cmd_silent;
10771     char_u	*defstr = (char_u *)"";
10772 
10773     rettv->v_type = VAR_STRING;
10774 
10775 #ifdef NO_CONSOLE_INPUT
10776     /* While starting up, there is no place to enter text. */
10777     if (no_console_input())
10778     {
10779 	rettv->vval.v_string = NULL;
10780 	return;
10781     }
10782 #endif
10783 
10784     cmd_silent = FALSE;		/* Want to see the prompt. */
10785     if (prompt != NULL)
10786     {
10787 	/* Only the part of the message after the last NL is considered as
10788 	 * prompt for the command line */
10789 	p = vim_strrchr(prompt, '\n');
10790 	if (p == NULL)
10791 	    p = prompt;
10792 	else
10793 	{
10794 	    ++p;
10795 	    c = *p;
10796 	    *p = NUL;
10797 	    msg_start();
10798 	    msg_clr_eos();
10799 	    msg_puts_attr(prompt, echo_attr);
10800 	    msg_didout = FALSE;
10801 	    msg_starthere();
10802 	    *p = c;
10803 	}
10804 	cmdline_row = msg_row;
10805 
10806 	if (argvars[1].v_type != VAR_UNKNOWN)
10807 	{
10808 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10809 	    if (defstr != NULL)
10810 		stuffReadbuffSpec(defstr);
10811 	}
10812 
10813 	if (defstr != NULL)
10814 	    rettv->vval.v_string =
10815 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr);
10816 
10817 	/* since the user typed this, no need to wait for return */
10818 	need_wait_return = FALSE;
10819 	msg_didout = FALSE;
10820     }
10821     cmd_silent = cmd_silent_save;
10822 }
10823 
10824 /*
10825  * "inputdialog()" function
10826  */
10827     static void
10828 f_inputdialog(argvars, rettv)
10829     typval_T	*argvars;
10830     typval_T	*rettv;
10831 {
10832 #if defined(FEAT_GUI_TEXTDIALOG)
10833     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10834     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10835     {
10836 	char_u	*message;
10837 	char_u	buf[NUMBUFLEN];
10838 	char_u	*defstr = (char_u *)"";
10839 
10840 	message = get_tv_string_chk(&argvars[0]);
10841 	if (argvars[1].v_type != VAR_UNKNOWN
10842 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10843 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10844 	else
10845 	    IObuff[0] = NUL;
10846 	if (message != NULL && defstr != NULL
10847 		&& do_dialog(VIM_QUESTION, NULL, message,
10848 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10849 	    rettv->vval.v_string = vim_strsave(IObuff);
10850 	else
10851 	{
10852 	    if (message != NULL && defstr != NULL
10853 					&& argvars[1].v_type != VAR_UNKNOWN
10854 					&& argvars[2].v_type != VAR_UNKNOWN)
10855 		rettv->vval.v_string = vim_strsave(
10856 				      get_tv_string_buf(&argvars[2], buf));
10857 	    else
10858 		rettv->vval.v_string = NULL;
10859 	}
10860 	rettv->v_type = VAR_STRING;
10861     }
10862     else
10863 #endif
10864 	f_input(argvars, rettv);
10865 }
10866 
10867 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10868 
10869 /*
10870  * "inputrestore()" function
10871  */
10872 /*ARGSUSED*/
10873     static void
10874 f_inputrestore(argvars, rettv)
10875     typval_T	*argvars;
10876     typval_T	*rettv;
10877 {
10878     if (ga_userinput.ga_len > 0)
10879     {
10880 	--ga_userinput.ga_len;
10881 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10882 						       + ga_userinput.ga_len);
10883 	rettv->vval.v_number = 0; /* OK */
10884     }
10885     else if (p_verbose > 1)
10886     {
10887 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
10888 	rettv->vval.v_number = 1; /* Failed */
10889     }
10890 }
10891 
10892 /*
10893  * "inputsave()" function
10894  */
10895 /*ARGSUSED*/
10896     static void
10897 f_inputsave(argvars, rettv)
10898     typval_T	*argvars;
10899     typval_T	*rettv;
10900 {
10901     /* Add an entry to the stack of typehead storage. */
10902     if (ga_grow(&ga_userinput, 1) == OK)
10903     {
10904 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
10905 						       + ga_userinput.ga_len);
10906 	++ga_userinput.ga_len;
10907 	rettv->vval.v_number = 0; /* OK */
10908     }
10909     else
10910 	rettv->vval.v_number = 1; /* Failed */
10911 }
10912 
10913 /*
10914  * "inputsecret()" function
10915  */
10916     static void
10917 f_inputsecret(argvars, rettv)
10918     typval_T	*argvars;
10919     typval_T	*rettv;
10920 {
10921     ++cmdline_star;
10922     ++inputsecret_flag;
10923     f_input(argvars, rettv);
10924     --cmdline_star;
10925     --inputsecret_flag;
10926 }
10927 
10928 /*
10929  * "insert()" function
10930  */
10931     static void
10932 f_insert(argvars, rettv)
10933     typval_T	*argvars;
10934     typval_T	*rettv;
10935 {
10936     long	before = 0;
10937     listitem_T	*item;
10938     list_T	*l;
10939     int		error = FALSE;
10940 
10941     rettv->vval.v_number = 0;
10942     if (argvars[0].v_type != VAR_LIST)
10943 	EMSG2(_(e_listarg), "insert()");
10944     else if ((l = argvars[0].vval.v_list) != NULL
10945 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
10946     {
10947 	if (argvars[2].v_type != VAR_UNKNOWN)
10948 	    before = get_tv_number_chk(&argvars[2], &error);
10949 	if (error)
10950 	    return;		/* type error; errmsg already given */
10951 
10952 	if (before == l->lv_len)
10953 	    item = NULL;
10954 	else
10955 	{
10956 	    item = list_find(l, before);
10957 	    if (item == NULL)
10958 	    {
10959 		EMSGN(_(e_listidx), before);
10960 		l = NULL;
10961 	    }
10962 	}
10963 	if (l != NULL)
10964 	{
10965 	    list_insert_tv(l, &argvars[1], item);
10966 	    copy_tv(&argvars[0], rettv);
10967 	}
10968     }
10969 }
10970 
10971 /*
10972  * "isdirectory()" function
10973  */
10974     static void
10975 f_isdirectory(argvars, rettv)
10976     typval_T	*argvars;
10977     typval_T	*rettv;
10978 {
10979     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
10980 }
10981 
10982 /*
10983  * "islocked()" function
10984  */
10985     static void
10986 f_islocked(argvars, rettv)
10987     typval_T	*argvars;
10988     typval_T	*rettv;
10989 {
10990     lval_T	lv;
10991     char_u	*end;
10992     dictitem_T	*di;
10993 
10994     rettv->vval.v_number = -1;
10995     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
10996 							     FNE_CHECK_START);
10997     if (end != NULL && lv.ll_name != NULL)
10998     {
10999 	if (*end != NUL)
11000 	    EMSG(_(e_trailing));
11001 	else
11002 	{
11003 	    if (lv.ll_tv == NULL)
11004 	    {
11005 		if (check_changedtick(lv.ll_name))
11006 		    rettv->vval.v_number = 1;	    /* always locked */
11007 		else
11008 		{
11009 		    di = find_var(lv.ll_name, NULL);
11010 		    if (di != NULL)
11011 		    {
11012 			/* Consider a variable locked when:
11013 			 * 1. the variable itself is locked
11014 			 * 2. the value of the variable is locked.
11015 			 * 3. the List or Dict value is locked.
11016 			 */
11017 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11018 						  || tv_islocked(&di->di_tv));
11019 		    }
11020 		}
11021 	    }
11022 	    else if (lv.ll_range)
11023 		EMSG(_("E745: Range not allowed"));
11024 	    else if (lv.ll_newkey != NULL)
11025 		EMSG2(_(e_dictkey), lv.ll_newkey);
11026 	    else if (lv.ll_list != NULL)
11027 		/* List item. */
11028 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11029 	    else
11030 		/* Dictionary item. */
11031 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11032 	}
11033     }
11034 
11035     clear_lval(&lv);
11036 }
11037 
11038 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11039 
11040 /*
11041  * Turn a dict into a list:
11042  * "what" == 0: list of keys
11043  * "what" == 1: list of values
11044  * "what" == 2: list of items
11045  */
11046     static void
11047 dict_list(argvars, rettv, what)
11048     typval_T	*argvars;
11049     typval_T	*rettv;
11050     int		what;
11051 {
11052     list_T	*l;
11053     list_T	*l2;
11054     dictitem_T	*di;
11055     hashitem_T	*hi;
11056     listitem_T	*li;
11057     listitem_T	*li2;
11058     dict_T	*d;
11059     int		todo;
11060 
11061     rettv->vval.v_number = 0;
11062     if (argvars[0].v_type != VAR_DICT)
11063     {
11064 	EMSG(_(e_dictreq));
11065 	return;
11066     }
11067     if ((d = argvars[0].vval.v_dict) == NULL)
11068 	return;
11069 
11070     l = list_alloc();
11071     if (l == NULL)
11072 	return;
11073     rettv->v_type = VAR_LIST;
11074     rettv->vval.v_list = l;
11075     ++l->lv_refcount;
11076 
11077     todo = d->dv_hashtab.ht_used;
11078     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11079     {
11080 	if (!HASHITEM_EMPTY(hi))
11081 	{
11082 	    --todo;
11083 	    di = HI2DI(hi);
11084 
11085 	    li = listitem_alloc();
11086 	    if (li == NULL)
11087 		break;
11088 	    list_append(l, li);
11089 
11090 	    if (what == 0)
11091 	    {
11092 		/* keys() */
11093 		li->li_tv.v_type = VAR_STRING;
11094 		li->li_tv.v_lock = 0;
11095 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11096 	    }
11097 	    else if (what == 1)
11098 	    {
11099 		/* values() */
11100 		copy_tv(&di->di_tv, &li->li_tv);
11101 	    }
11102 	    else
11103 	    {
11104 		/* items() */
11105 		l2 = list_alloc();
11106 		li->li_tv.v_type = VAR_LIST;
11107 		li->li_tv.v_lock = 0;
11108 		li->li_tv.vval.v_list = l2;
11109 		if (l2 == NULL)
11110 		    break;
11111 		++l2->lv_refcount;
11112 
11113 		li2 = listitem_alloc();
11114 		if (li2 == NULL)
11115 		    break;
11116 		list_append(l2, li2);
11117 		li2->li_tv.v_type = VAR_STRING;
11118 		li2->li_tv.v_lock = 0;
11119 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11120 
11121 		li2 = listitem_alloc();
11122 		if (li2 == NULL)
11123 		    break;
11124 		list_append(l2, li2);
11125 		copy_tv(&di->di_tv, &li2->li_tv);
11126 	    }
11127 	}
11128     }
11129 }
11130 
11131 /*
11132  * "items(dict)" function
11133  */
11134     static void
11135 f_items(argvars, rettv)
11136     typval_T	*argvars;
11137     typval_T	*rettv;
11138 {
11139     dict_list(argvars, rettv, 2);
11140 }
11141 
11142 /*
11143  * "join()" function
11144  */
11145     static void
11146 f_join(argvars, rettv)
11147     typval_T	*argvars;
11148     typval_T	*rettv;
11149 {
11150     garray_T	ga;
11151     char_u	*sep;
11152 
11153     rettv->vval.v_number = 0;
11154     if (argvars[0].v_type != VAR_LIST)
11155     {
11156 	EMSG(_(e_listreq));
11157 	return;
11158     }
11159     if (argvars[0].vval.v_list == NULL)
11160 	return;
11161     if (argvars[1].v_type == VAR_UNKNOWN)
11162 	sep = (char_u *)" ";
11163     else
11164 	sep = get_tv_string_chk(&argvars[1]);
11165 
11166     rettv->v_type = VAR_STRING;
11167 
11168     if (sep != NULL)
11169     {
11170 	ga_init2(&ga, (int)sizeof(char), 80);
11171 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11172 	ga_append(&ga, NUL);
11173 	rettv->vval.v_string = (char_u *)ga.ga_data;
11174     }
11175     else
11176 	rettv->vval.v_string = NULL;
11177 }
11178 
11179 /*
11180  * "keys()" function
11181  */
11182     static void
11183 f_keys(argvars, rettv)
11184     typval_T	*argvars;
11185     typval_T	*rettv;
11186 {
11187     dict_list(argvars, rettv, 0);
11188 }
11189 
11190 /*
11191  * "last_buffer_nr()" function.
11192  */
11193 /*ARGSUSED*/
11194     static void
11195 f_last_buffer_nr(argvars, rettv)
11196     typval_T	*argvars;
11197     typval_T	*rettv;
11198 {
11199     int		n = 0;
11200     buf_T	*buf;
11201 
11202     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11203 	if (n < buf->b_fnum)
11204 	    n = buf->b_fnum;
11205 
11206     rettv->vval.v_number = n;
11207 }
11208 
11209 /*
11210  * "len()" function
11211  */
11212     static void
11213 f_len(argvars, rettv)
11214     typval_T	*argvars;
11215     typval_T	*rettv;
11216 {
11217     switch (argvars[0].v_type)
11218     {
11219 	case VAR_STRING:
11220 	case VAR_NUMBER:
11221 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11222 					       get_tv_string(&argvars[0]));
11223 	    break;
11224 	case VAR_LIST:
11225 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11226 	    break;
11227 	case VAR_DICT:
11228 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11229 	    break;
11230 	default:
11231 	    EMSG(_("E701: Invalid type for len()"));
11232 	    break;
11233     }
11234 }
11235 
11236 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11237 
11238     static void
11239 libcall_common(argvars, rettv, type)
11240     typval_T	*argvars;
11241     typval_T	*rettv;
11242     int		type;
11243 {
11244 #ifdef FEAT_LIBCALL
11245     char_u		*string_in;
11246     char_u		**string_result;
11247     int			nr_result;
11248 #endif
11249 
11250     rettv->v_type = type;
11251     if (type == VAR_NUMBER)
11252 	rettv->vval.v_number = 0;
11253     else
11254 	rettv->vval.v_string = NULL;
11255 
11256     if (check_restricted() || check_secure())
11257 	return;
11258 
11259 #ifdef FEAT_LIBCALL
11260     /* The first two args must be strings, otherwise its meaningless */
11261     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11262     {
11263 	string_in = NULL;
11264 	if (argvars[2].v_type == VAR_STRING)
11265 	    string_in = argvars[2].vval.v_string;
11266 	if (type == VAR_NUMBER)
11267 	    string_result = NULL;
11268 	else
11269 	    string_result = &rettv->vval.v_string;
11270 	if (mch_libcall(argvars[0].vval.v_string,
11271 			     argvars[1].vval.v_string,
11272 			     string_in,
11273 			     argvars[2].vval.v_number,
11274 			     string_result,
11275 			     &nr_result) == OK
11276 		&& type == VAR_NUMBER)
11277 	    rettv->vval.v_number = nr_result;
11278     }
11279 #endif
11280 }
11281 
11282 /*
11283  * "libcall()" function
11284  */
11285     static void
11286 f_libcall(argvars, rettv)
11287     typval_T	*argvars;
11288     typval_T	*rettv;
11289 {
11290     libcall_common(argvars, rettv, VAR_STRING);
11291 }
11292 
11293 /*
11294  * "libcallnr()" function
11295  */
11296     static void
11297 f_libcallnr(argvars, rettv)
11298     typval_T	*argvars;
11299     typval_T	*rettv;
11300 {
11301     libcall_common(argvars, rettv, VAR_NUMBER);
11302 }
11303 
11304 /*
11305  * "line(string)" function
11306  */
11307     static void
11308 f_line(argvars, rettv)
11309     typval_T	*argvars;
11310     typval_T	*rettv;
11311 {
11312     linenr_T	lnum = 0;
11313     pos_T	*fp;
11314 
11315     fp = var2fpos(&argvars[0], TRUE);
11316     if (fp != NULL)
11317 	lnum = fp->lnum;
11318     rettv->vval.v_number = lnum;
11319 }
11320 
11321 /*
11322  * "line2byte(lnum)" function
11323  */
11324 /*ARGSUSED*/
11325     static void
11326 f_line2byte(argvars, rettv)
11327     typval_T	*argvars;
11328     typval_T	*rettv;
11329 {
11330 #ifndef FEAT_BYTEOFF
11331     rettv->vval.v_number = -1;
11332 #else
11333     linenr_T	lnum;
11334 
11335     lnum = get_tv_lnum(argvars);
11336     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11337 	rettv->vval.v_number = -1;
11338     else
11339 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11340     if (rettv->vval.v_number >= 0)
11341 	++rettv->vval.v_number;
11342 #endif
11343 }
11344 
11345 /*
11346  * "lispindent(lnum)" function
11347  */
11348     static void
11349 f_lispindent(argvars, rettv)
11350     typval_T	*argvars;
11351     typval_T	*rettv;
11352 {
11353 #ifdef FEAT_LISP
11354     pos_T	pos;
11355     linenr_T	lnum;
11356 
11357     pos = curwin->w_cursor;
11358     lnum = get_tv_lnum(argvars);
11359     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11360     {
11361 	curwin->w_cursor.lnum = lnum;
11362 	rettv->vval.v_number = get_lisp_indent();
11363 	curwin->w_cursor = pos;
11364     }
11365     else
11366 #endif
11367 	rettv->vval.v_number = -1;
11368 }
11369 
11370 /*
11371  * "localtime()" function
11372  */
11373 /*ARGSUSED*/
11374     static void
11375 f_localtime(argvars, rettv)
11376     typval_T	*argvars;
11377     typval_T	*rettv;
11378 {
11379     rettv->vval.v_number = (varnumber_T)time(NULL);
11380 }
11381 
11382 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11383 
11384     static void
11385 get_maparg(argvars, rettv, exact)
11386     typval_T	*argvars;
11387     typval_T	*rettv;
11388     int		exact;
11389 {
11390     char_u	*keys;
11391     char_u	*which;
11392     char_u	buf[NUMBUFLEN];
11393     char_u	*keys_buf = NULL;
11394     char_u	*rhs;
11395     int		mode;
11396     garray_T	ga;
11397 
11398     /* return empty string for failure */
11399     rettv->v_type = VAR_STRING;
11400     rettv->vval.v_string = NULL;
11401 
11402     keys = get_tv_string(&argvars[0]);
11403     if (*keys == NUL)
11404 	return;
11405 
11406     if (argvars[1].v_type != VAR_UNKNOWN)
11407 	which = get_tv_string_buf_chk(&argvars[1], buf);
11408     else
11409 	which = (char_u *)"";
11410     if (which == NULL)
11411 	return;
11412 
11413     mode = get_map_mode(&which, 0);
11414 
11415     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11416     rhs = check_map(keys, mode, exact, FALSE);
11417     vim_free(keys_buf);
11418     if (rhs != NULL)
11419     {
11420 	ga_init(&ga);
11421 	ga.ga_itemsize = 1;
11422 	ga.ga_growsize = 40;
11423 
11424 	while (*rhs != NUL)
11425 	    ga_concat(&ga, str2special(&rhs, FALSE));
11426 
11427 	ga_append(&ga, NUL);
11428 	rettv->vval.v_string = (char_u *)ga.ga_data;
11429     }
11430 }
11431 
11432 /*
11433  * "map()" function
11434  */
11435     static void
11436 f_map(argvars, rettv)
11437     typval_T	*argvars;
11438     typval_T	*rettv;
11439 {
11440     filter_map(argvars, rettv, TRUE);
11441 }
11442 
11443 /*
11444  * "maparg()" function
11445  */
11446     static void
11447 f_maparg(argvars, rettv)
11448     typval_T	*argvars;
11449     typval_T	*rettv;
11450 {
11451     get_maparg(argvars, rettv, TRUE);
11452 }
11453 
11454 /*
11455  * "mapcheck()" function
11456  */
11457     static void
11458 f_mapcheck(argvars, rettv)
11459     typval_T	*argvars;
11460     typval_T	*rettv;
11461 {
11462     get_maparg(argvars, rettv, FALSE);
11463 }
11464 
11465 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11466 
11467     static void
11468 find_some_match(argvars, rettv, type)
11469     typval_T	*argvars;
11470     typval_T	*rettv;
11471     int		type;
11472 {
11473     char_u	*str = NULL;
11474     char_u	*expr = NULL;
11475     char_u	*pat;
11476     regmatch_T	regmatch;
11477     char_u	patbuf[NUMBUFLEN];
11478     char_u	strbuf[NUMBUFLEN];
11479     char_u	*save_cpo;
11480     long	start = 0;
11481     long	nth = 1;
11482     int		match = 0;
11483     list_T	*l = NULL;
11484     listitem_T	*li = NULL;
11485     long	idx = 0;
11486     char_u	*tofree = NULL;
11487 
11488     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11489     save_cpo = p_cpo;
11490     p_cpo = (char_u *)"";
11491 
11492     rettv->vval.v_number = -1;
11493     if (type == 3)
11494     {
11495 	/* return empty list when there are no matches */
11496 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11497 	    goto theend;
11498 	rettv->v_type = VAR_LIST;
11499 	++rettv->vval.v_list->lv_refcount;
11500     }
11501     else if (type == 2)
11502     {
11503 	rettv->v_type = VAR_STRING;
11504 	rettv->vval.v_string = NULL;
11505     }
11506 
11507     if (argvars[0].v_type == VAR_LIST)
11508     {
11509 	if ((l = argvars[0].vval.v_list) == NULL)
11510 	    goto theend;
11511 	li = l->lv_first;
11512     }
11513     else
11514 	expr = str = get_tv_string(&argvars[0]);
11515 
11516     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11517     if (pat == NULL)
11518 	goto theend;
11519 
11520     if (argvars[2].v_type != VAR_UNKNOWN)
11521     {
11522 	int	    error = FALSE;
11523 
11524 	start = get_tv_number_chk(&argvars[2], &error);
11525 	if (error)
11526 	    goto theend;
11527 	if (l != NULL)
11528 	{
11529 	    li = list_find(l, start);
11530 	    if (li == NULL)
11531 		goto theend;
11532 	    idx = l->lv_idx;	/* use the cached index */
11533 	}
11534 	else
11535 	{
11536 	    if (start < 0)
11537 		start = 0;
11538 	    if (start > (long)STRLEN(str))
11539 		goto theend;
11540 	    str += start;
11541 	}
11542 
11543 	if (argvars[3].v_type != VAR_UNKNOWN)
11544 	    nth = get_tv_number_chk(&argvars[3], &error);
11545 	if (error)
11546 	    goto theend;
11547     }
11548 
11549     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11550     if (regmatch.regprog != NULL)
11551     {
11552 	regmatch.rm_ic = p_ic;
11553 
11554 	for (;;)
11555 	{
11556 	    if (l != NULL)
11557 	    {
11558 		if (li == NULL)
11559 		{
11560 		    match = FALSE;
11561 		    break;
11562 		}
11563 		vim_free(tofree);
11564 		str = echo_string(&li->li_tv, &tofree, strbuf);
11565 		if (str == NULL)
11566 		    break;
11567 	    }
11568 
11569 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11570 
11571 	    if (match && --nth <= 0)
11572 		break;
11573 	    if (l == NULL && !match)
11574 		break;
11575 
11576 	    /* Advance to just after the match. */
11577 	    if (l != NULL)
11578 	    {
11579 		li = li->li_next;
11580 		++idx;
11581 	    }
11582 	    else
11583 	    {
11584 #ifdef FEAT_MBYTE
11585 		str = regmatch.startp[0] + (*mb_ptr2len)(regmatch.startp[0]);
11586 #else
11587 		str = regmatch.startp[0] + 1;
11588 #endif
11589 	    }
11590 	}
11591 
11592 	if (match)
11593 	{
11594 	    if (type == 3)
11595 	    {
11596 		int i;
11597 
11598 		/* return list with matched string and submatches */
11599 		for (i = 0; i < NSUBEXP; ++i)
11600 		{
11601 		    if (regmatch.endp[i] == NULL)
11602 			break;
11603 		    li = listitem_alloc();
11604 		    if (li == NULL)
11605 			break;
11606 		    li->li_tv.v_type = VAR_STRING;
11607 		    li->li_tv.v_lock = 0;
11608 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11609 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11610 		    list_append(rettv->vval.v_list, li);
11611 		}
11612 	    }
11613 	    else if (type == 2)
11614 	    {
11615 		/* return matched string */
11616 		if (l != NULL)
11617 		    copy_tv(&li->li_tv, rettv);
11618 		else
11619 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11620 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11621 	    }
11622 	    else if (l != NULL)
11623 		rettv->vval.v_number = idx;
11624 	    else
11625 	    {
11626 		if (type != 0)
11627 		    rettv->vval.v_number =
11628 				      (varnumber_T)(regmatch.startp[0] - str);
11629 		else
11630 		    rettv->vval.v_number =
11631 					(varnumber_T)(regmatch.endp[0] - str);
11632 		rettv->vval.v_number += str - expr;
11633 	    }
11634 	}
11635 	vim_free(regmatch.regprog);
11636     }
11637 
11638 theend:
11639     vim_free(tofree);
11640     p_cpo = save_cpo;
11641 }
11642 
11643 /*
11644  * "match()" function
11645  */
11646     static void
11647 f_match(argvars, rettv)
11648     typval_T	*argvars;
11649     typval_T	*rettv;
11650 {
11651     find_some_match(argvars, rettv, 1);
11652 }
11653 
11654 /*
11655  * "matchend()" function
11656  */
11657     static void
11658 f_matchend(argvars, rettv)
11659     typval_T	*argvars;
11660     typval_T	*rettv;
11661 {
11662     find_some_match(argvars, rettv, 0);
11663 }
11664 
11665 /*
11666  * "matchlist()" function
11667  */
11668     static void
11669 f_matchlist(argvars, rettv)
11670     typval_T	*argvars;
11671     typval_T	*rettv;
11672 {
11673     find_some_match(argvars, rettv, 3);
11674 }
11675 
11676 /*
11677  * "matchstr()" function
11678  */
11679     static void
11680 f_matchstr(argvars, rettv)
11681     typval_T	*argvars;
11682     typval_T	*rettv;
11683 {
11684     find_some_match(argvars, rettv, 2);
11685 }
11686 
11687 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11688 
11689     static void
11690 max_min(argvars, rettv, domax)
11691     typval_T	*argvars;
11692     typval_T	*rettv;
11693     int		domax;
11694 {
11695     long	n = 0;
11696     long	i;
11697     int		error = FALSE;
11698 
11699     if (argvars[0].v_type == VAR_LIST)
11700     {
11701 	list_T		*l;
11702 	listitem_T	*li;
11703 
11704 	l = argvars[0].vval.v_list;
11705 	if (l != NULL)
11706 	{
11707 	    li = l->lv_first;
11708 	    if (li != NULL)
11709 	    {
11710 		n = get_tv_number_chk(&li->li_tv, &error);
11711 		for (;;)
11712 		{
11713 		    li = li->li_next;
11714 		    if (li == NULL)
11715 			break;
11716 		    i = get_tv_number_chk(&li->li_tv, &error);
11717 		    if (domax ? i > n : i < n)
11718 			n = i;
11719 		}
11720 	    }
11721 	}
11722     }
11723     else if (argvars[0].v_type == VAR_DICT)
11724     {
11725 	dict_T		*d;
11726 	int		first = TRUE;
11727 	hashitem_T	*hi;
11728 	int		todo;
11729 
11730 	d = argvars[0].vval.v_dict;
11731 	if (d != NULL)
11732 	{
11733 	    todo = d->dv_hashtab.ht_used;
11734 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11735 	    {
11736 		if (!HASHITEM_EMPTY(hi))
11737 		{
11738 		    --todo;
11739 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11740 		    if (first)
11741 		    {
11742 			n = i;
11743 			first = FALSE;
11744 		    }
11745 		    else if (domax ? i > n : i < n)
11746 			n = i;
11747 		}
11748 	    }
11749 	}
11750     }
11751     else
11752 	EMSG(_(e_listdictarg));
11753     rettv->vval.v_number = error ? 0 : n;
11754 }
11755 
11756 /*
11757  * "max()" function
11758  */
11759     static void
11760 f_max(argvars, rettv)
11761     typval_T	*argvars;
11762     typval_T	*rettv;
11763 {
11764     max_min(argvars, rettv, TRUE);
11765 }
11766 
11767 /*
11768  * "min()" function
11769  */
11770     static void
11771 f_min(argvars, rettv)
11772     typval_T	*argvars;
11773     typval_T	*rettv;
11774 {
11775     max_min(argvars, rettv, FALSE);
11776 }
11777 
11778 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11779 
11780 /*
11781  * Create the directory in which "dir" is located, and higher levels when
11782  * needed.
11783  */
11784     static int
11785 mkdir_recurse(dir, prot)
11786     char_u	*dir;
11787     int		prot;
11788 {
11789     char_u	*p;
11790     char_u	*updir;
11791     int		r = FAIL;
11792 
11793     /* Get end of directory name in "dir".
11794      * We're done when it's "/" or "c:/". */
11795     p = gettail_sep(dir);
11796     if (p <= get_past_head(dir))
11797 	return OK;
11798 
11799     /* If the directory exists we're done.  Otherwise: create it.*/
11800     updir = vim_strnsave(dir, (int)(p - dir));
11801     if (updir == NULL)
11802 	return FAIL;
11803     if (mch_isdir(updir))
11804 	r = OK;
11805     else if (mkdir_recurse(updir, prot) == OK)
11806 	r = vim_mkdir_emsg(updir, prot);
11807     vim_free(updir);
11808     return r;
11809 }
11810 
11811 #ifdef vim_mkdir
11812 /*
11813  * "mkdir()" function
11814  */
11815     static void
11816 f_mkdir(argvars, rettv)
11817     typval_T	*argvars;
11818     typval_T	*rettv;
11819 {
11820     char_u	*dir;
11821     char_u	buf[NUMBUFLEN];
11822     int		prot = 0755;
11823 
11824     rettv->vval.v_number = FAIL;
11825     if (check_restricted() || check_secure())
11826 	return;
11827 
11828     dir = get_tv_string_buf(&argvars[0], buf);
11829     if (argvars[1].v_type != VAR_UNKNOWN)
11830     {
11831 	if (argvars[2].v_type != VAR_UNKNOWN)
11832 	    prot = get_tv_number_chk(&argvars[2], NULL);
11833 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11834 	    mkdir_recurse(dir, prot);
11835     }
11836     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11837 }
11838 #endif
11839 
11840 /*
11841  * "mode()" function
11842  */
11843 /*ARGSUSED*/
11844     static void
11845 f_mode(argvars, rettv)
11846     typval_T	*argvars;
11847     typval_T	*rettv;
11848 {
11849     char_u	buf[2];
11850 
11851 #ifdef FEAT_VISUAL
11852     if (VIsual_active)
11853     {
11854 	if (VIsual_select)
11855 	    buf[0] = VIsual_mode + 's' - 'v';
11856 	else
11857 	    buf[0] = VIsual_mode;
11858     }
11859     else
11860 #endif
11861 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11862 	buf[0] = 'r';
11863     else if (State & INSERT)
11864     {
11865 	if (State & REPLACE_FLAG)
11866 	    buf[0] = 'R';
11867 	else
11868 	    buf[0] = 'i';
11869     }
11870     else if (State & CMDLINE)
11871 	buf[0] = 'c';
11872     else
11873 	buf[0] = 'n';
11874 
11875     buf[1] = NUL;
11876     rettv->vval.v_string = vim_strsave(buf);
11877     rettv->v_type = VAR_STRING;
11878 }
11879 
11880 /*
11881  * "nextnonblank()" function
11882  */
11883     static void
11884 f_nextnonblank(argvars, rettv)
11885     typval_T	*argvars;
11886     typval_T	*rettv;
11887 {
11888     linenr_T	lnum;
11889 
11890     for (lnum = get_tv_lnum(argvars); ; ++lnum)
11891     {
11892 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
11893 	{
11894 	    lnum = 0;
11895 	    break;
11896 	}
11897 	if (*skipwhite(ml_get(lnum)) != NUL)
11898 	    break;
11899     }
11900     rettv->vval.v_number = lnum;
11901 }
11902 
11903 /*
11904  * "nr2char()" function
11905  */
11906     static void
11907 f_nr2char(argvars, rettv)
11908     typval_T	*argvars;
11909     typval_T	*rettv;
11910 {
11911     char_u	buf[NUMBUFLEN];
11912 
11913 #ifdef FEAT_MBYTE
11914     if (has_mbyte)
11915 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
11916     else
11917 #endif
11918     {
11919 	buf[0] = (char_u)get_tv_number(&argvars[0]);
11920 	buf[1] = NUL;
11921     }
11922     rettv->v_type = VAR_STRING;
11923     rettv->vval.v_string = vim_strsave(buf);
11924 }
11925 
11926 /*
11927  * "prevnonblank()" function
11928  */
11929     static void
11930 f_prevnonblank(argvars, rettv)
11931     typval_T	*argvars;
11932     typval_T	*rettv;
11933 {
11934     linenr_T	lnum;
11935 
11936     lnum = get_tv_lnum(argvars);
11937     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
11938 	lnum = 0;
11939     else
11940 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
11941 	    --lnum;
11942     rettv->vval.v_number = lnum;
11943 }
11944 
11945 /*
11946  * "printf()" function
11947  */
11948     static void
11949 f_printf(argvars, rettv)
11950     typval_T	*argvars;
11951     typval_T	*rettv;
11952 {
11953     rettv->v_type = VAR_STRING;
11954     rettv->vval.v_string = NULL;
11955 #ifdef HAVE_STDARG_H
11956     {
11957 	char_u	buf[NUMBUFLEN];
11958 	int	len;
11959 	char_u	*s;
11960 	int	saved_did_emsg = did_emsg;
11961 	char	*fmt;
11962 
11963 	/* Get the required length, allocate the buffer and do it for real. */
11964 	did_emsg = FALSE;
11965 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
11966 	len = vim_vsnprintf(NULL, 0, fmt, NULL, argvars + 1);
11967 	if (!did_emsg)
11968 	{
11969 	    s = alloc(len + 1);
11970 	    if (s != NULL)
11971 	    {
11972 		rettv->vval.v_string = s;
11973 		(void)vim_vsnprintf((char *)s, len + 1, fmt, NULL, argvars + 1);
11974 	    }
11975 	}
11976 	did_emsg |= saved_did_emsg;
11977     }
11978 #endif
11979 }
11980 
11981 /*
11982  * "range()" function
11983  */
11984     static void
11985 f_range(argvars, rettv)
11986     typval_T	*argvars;
11987     typval_T	*rettv;
11988 {
11989     long	start;
11990     long	end;
11991     long	stride = 1;
11992     long	i;
11993     list_T	*l;
11994     listitem_T	*li;
11995     int		error = FALSE;
11996 
11997     start = get_tv_number_chk(&argvars[0], &error);
11998     if (argvars[1].v_type == VAR_UNKNOWN)
11999     {
12000 	end = start - 1;
12001 	start = 0;
12002     }
12003     else
12004     {
12005 	end = get_tv_number_chk(&argvars[1], &error);
12006 	if (argvars[2].v_type != VAR_UNKNOWN)
12007 	    stride = get_tv_number_chk(&argvars[2], &error);
12008     }
12009 
12010     rettv->vval.v_number = 0;
12011     if (error)
12012 	return;		/* type error; errmsg already given */
12013     if (stride == 0)
12014 	EMSG(_("E726: Stride is zero"));
12015     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12016 	EMSG(_("E727: Start past end"));
12017     else
12018     {
12019 	l = list_alloc();
12020 	if (l != NULL)
12021 	{
12022 	    rettv->v_type = VAR_LIST;
12023 	    rettv->vval.v_list = l;
12024 	    ++l->lv_refcount;
12025 
12026 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12027 	    {
12028 		li = listitem_alloc();
12029 		if (li == NULL)
12030 		    break;
12031 		li->li_tv.v_type = VAR_NUMBER;
12032 		li->li_tv.v_lock = 0;
12033 		li->li_tv.vval.v_number = i;
12034 		list_append(l, li);
12035 	    }
12036 	}
12037     }
12038 }
12039 
12040 /*
12041  * "readfile()" function
12042  */
12043     static void
12044 f_readfile(argvars, rettv)
12045     typval_T	*argvars;
12046     typval_T	*rettv;
12047 {
12048     int		binary = FALSE;
12049     char_u	*fname;
12050     FILE	*fd;
12051     list_T	*l;
12052     listitem_T	*li;
12053 #define FREAD_SIZE 200	    /* optimized for text lines */
12054     char_u	buf[FREAD_SIZE];
12055     int		readlen;    /* size of last fread() */
12056     int		buflen;	    /* nr of valid chars in buf[] */
12057     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12058     int		tolist;	    /* first byte in buf[] still to be put in list */
12059     int		chop;	    /* how many CR to chop off */
12060     char_u	*prev = NULL;	/* previously read bytes, if any */
12061     int		prevlen = 0;    /* length of "prev" if not NULL */
12062     char_u	*s;
12063     int		len;
12064     long	maxline = MAXLNUM;
12065     long	cnt = 0;
12066 
12067     if (argvars[1].v_type != VAR_UNKNOWN)
12068     {
12069 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12070 	    binary = TRUE;
12071 	if (argvars[2].v_type != VAR_UNKNOWN)
12072 	    maxline = get_tv_number(&argvars[2]);
12073     }
12074 
12075     l = list_alloc();
12076     if (l == NULL)
12077 	return;
12078     rettv->v_type = VAR_LIST;
12079     rettv->vval.v_list = l;
12080     l->lv_refcount = 1;
12081 
12082     /* Always open the file in binary mode, library functions have a mind of
12083      * their own about CR-LF conversion. */
12084     fname = get_tv_string(&argvars[0]);
12085     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12086     {
12087 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12088 	return;
12089     }
12090 
12091     filtd = 0;
12092     while (cnt < maxline || maxline < 0)
12093     {
12094 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12095 	buflen = filtd + readlen;
12096 	tolist = 0;
12097 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12098 	{
12099 	    if (buf[filtd] == '\n' || readlen <= 0)
12100 	    {
12101 		/* Only when in binary mode add an empty list item when the
12102 		 * last line ends in a '\n'. */
12103 		if (!binary && readlen == 0 && filtd == 0)
12104 		    break;
12105 
12106 		/* Found end-of-line or end-of-file: add a text line to the
12107 		 * list. */
12108 		chop = 0;
12109 		if (!binary)
12110 		    while (filtd - chop - 1 >= tolist
12111 					  && buf[filtd - chop - 1] == '\r')
12112 			++chop;
12113 		len = filtd - tolist - chop;
12114 		if (prev == NULL)
12115 		    s = vim_strnsave(buf + tolist, len);
12116 		else
12117 		{
12118 		    s = alloc((unsigned)(prevlen + len + 1));
12119 		    if (s != NULL)
12120 		    {
12121 			mch_memmove(s, prev, prevlen);
12122 			vim_free(prev);
12123 			prev = NULL;
12124 			mch_memmove(s + prevlen, buf + tolist, len);
12125 			s[prevlen + len] = NUL;
12126 		    }
12127 		}
12128 		tolist = filtd + 1;
12129 
12130 		li = listitem_alloc();
12131 		if (li == NULL)
12132 		{
12133 		    vim_free(s);
12134 		    break;
12135 		}
12136 		li->li_tv.v_type = VAR_STRING;
12137 		li->li_tv.v_lock = 0;
12138 		li->li_tv.vval.v_string = s;
12139 		list_append(l, li);
12140 
12141 		if (++cnt >= maxline && maxline >= 0)
12142 		    break;
12143 		if (readlen <= 0)
12144 		    break;
12145 	    }
12146 	    else if (buf[filtd] == NUL)
12147 		buf[filtd] = '\n';
12148 	}
12149 	if (readlen <= 0)
12150 	    break;
12151 
12152 	if (tolist == 0)
12153 	{
12154 	    /* "buf" is full, need to move text to an allocated buffer */
12155 	    if (prev == NULL)
12156 	    {
12157 		prev = vim_strnsave(buf, buflen);
12158 		prevlen = buflen;
12159 	    }
12160 	    else
12161 	    {
12162 		s = alloc((unsigned)(prevlen + buflen));
12163 		if (s != NULL)
12164 		{
12165 		    mch_memmove(s, prev, prevlen);
12166 		    mch_memmove(s + prevlen, buf, buflen);
12167 		    vim_free(prev);
12168 		    prev = s;
12169 		    prevlen += buflen;
12170 		}
12171 	    }
12172 	    filtd = 0;
12173 	}
12174 	else
12175 	{
12176 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12177 	    filtd -= tolist;
12178 	}
12179     }
12180 
12181     /*
12182      * For a negative line count use only the lines at the end of the file,
12183      * free the rest.
12184      */
12185     if (maxline < 0)
12186 	while (cnt > -maxline)
12187 	{
12188 	    listitem_remove(l, l->lv_first);
12189 	    --cnt;
12190 	}
12191 
12192     vim_free(prev);
12193     fclose(fd);
12194 }
12195 
12196 
12197 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12198 static void make_connection __ARGS((void));
12199 static int check_connection __ARGS((void));
12200 
12201     static void
12202 make_connection()
12203 {
12204     if (X_DISPLAY == NULL
12205 # ifdef FEAT_GUI
12206 	    && !gui.in_use
12207 # endif
12208 	    )
12209     {
12210 	x_force_connect = TRUE;
12211 	setup_term_clip();
12212 	x_force_connect = FALSE;
12213     }
12214 }
12215 
12216     static int
12217 check_connection()
12218 {
12219     make_connection();
12220     if (X_DISPLAY == NULL)
12221     {
12222 	EMSG(_("E240: No connection to Vim server"));
12223 	return FAIL;
12224     }
12225     return OK;
12226 }
12227 #endif
12228 
12229 #ifdef FEAT_CLIENTSERVER
12230 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12231 
12232     static void
12233 remote_common(argvars, rettv, expr)
12234     typval_T	*argvars;
12235     typval_T	*rettv;
12236     int		expr;
12237 {
12238     char_u	*server_name;
12239     char_u	*keys;
12240     char_u	*r = NULL;
12241     char_u	buf[NUMBUFLEN];
12242 # ifdef WIN32
12243     HWND	w;
12244 # else
12245     Window	w;
12246 # endif
12247 
12248     if (check_restricted() || check_secure())
12249 	return;
12250 
12251 # ifdef FEAT_X11
12252     if (check_connection() == FAIL)
12253 	return;
12254 # endif
12255 
12256     server_name = get_tv_string_chk(&argvars[0]);
12257     if (server_name == NULL)
12258 	return;		/* type error; errmsg already given */
12259     keys = get_tv_string_buf(&argvars[1], buf);
12260 # ifdef WIN32
12261     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12262 # else
12263     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12264 									  < 0)
12265 # endif
12266     {
12267 	if (r != NULL)
12268 	    EMSG(r);		/* sending worked but evaluation failed */
12269 	else
12270 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12271 	return;
12272     }
12273 
12274     rettv->vval.v_string = r;
12275 
12276     if (argvars[2].v_type != VAR_UNKNOWN)
12277     {
12278 	dictitem_T	v;
12279 	char_u		str[30];
12280 	char_u		*idvar;
12281 
12282 	sprintf((char *)str, "0x%x", (unsigned int)w);
12283 	v.di_tv.v_type = VAR_STRING;
12284 	v.di_tv.vval.v_string = vim_strsave(str);
12285 	idvar = get_tv_string_chk(&argvars[2]);
12286 	if (idvar != NULL)
12287 	    set_var(idvar, &v.di_tv, FALSE);
12288 	vim_free(v.di_tv.vval.v_string);
12289     }
12290 }
12291 #endif
12292 
12293 /*
12294  * "remote_expr()" function
12295  */
12296 /*ARGSUSED*/
12297     static void
12298 f_remote_expr(argvars, rettv)
12299     typval_T	*argvars;
12300     typval_T	*rettv;
12301 {
12302     rettv->v_type = VAR_STRING;
12303     rettv->vval.v_string = NULL;
12304 #ifdef FEAT_CLIENTSERVER
12305     remote_common(argvars, rettv, TRUE);
12306 #endif
12307 }
12308 
12309 /*
12310  * "remote_foreground()" function
12311  */
12312 /*ARGSUSED*/
12313     static void
12314 f_remote_foreground(argvars, rettv)
12315     typval_T	*argvars;
12316     typval_T	*rettv;
12317 {
12318     rettv->vval.v_number = 0;
12319 #ifdef FEAT_CLIENTSERVER
12320 # ifdef WIN32
12321     /* On Win32 it's done in this application. */
12322     {
12323 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12324 
12325 	if (server_name != NULL)
12326 	    serverForeground(server_name);
12327     }
12328 # else
12329     /* Send a foreground() expression to the server. */
12330     argvars[1].v_type = VAR_STRING;
12331     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12332     argvars[2].v_type = VAR_UNKNOWN;
12333     remote_common(argvars, rettv, TRUE);
12334     vim_free(argvars[1].vval.v_string);
12335 # endif
12336 #endif
12337 }
12338 
12339 /*ARGSUSED*/
12340     static void
12341 f_remote_peek(argvars, rettv)
12342     typval_T	*argvars;
12343     typval_T	*rettv;
12344 {
12345 #ifdef FEAT_CLIENTSERVER
12346     dictitem_T	v;
12347     char_u	*s = NULL;
12348 # ifdef WIN32
12349     int		n = 0;
12350 # endif
12351     char_u	*serverid;
12352 
12353     if (check_restricted() || check_secure())
12354     {
12355 	rettv->vval.v_number = -1;
12356 	return;
12357     }
12358     serverid = get_tv_string_chk(&argvars[0]);
12359     if (serverid == NULL)
12360     {
12361 	rettv->vval.v_number = -1;
12362 	return;		/* type error; errmsg already given */
12363     }
12364 # ifdef WIN32
12365     sscanf(serverid, "%x", &n);
12366     if (n == 0)
12367 	rettv->vval.v_number = -1;
12368     else
12369     {
12370 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12371 	rettv->vval.v_number = (s != NULL);
12372     }
12373 # else
12374     rettv->vval.v_number = 0;
12375     if (check_connection() == FAIL)
12376 	return;
12377 
12378     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12379 						serverStrToWin(serverid), &s);
12380 # endif
12381 
12382     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12383     {
12384 	char_u		*retvar;
12385 
12386 	v.di_tv.v_type = VAR_STRING;
12387 	v.di_tv.vval.v_string = vim_strsave(s);
12388 	retvar = get_tv_string_chk(&argvars[1]);
12389 	if (retvar != NULL)
12390 	    set_var(retvar, &v.di_tv, FALSE);
12391 	vim_free(v.di_tv.vval.v_string);
12392     }
12393 #else
12394     rettv->vval.v_number = -1;
12395 #endif
12396 }
12397 
12398 /*ARGSUSED*/
12399     static void
12400 f_remote_read(argvars, rettv)
12401     typval_T	*argvars;
12402     typval_T	*rettv;
12403 {
12404     char_u	*r = NULL;
12405 
12406 #ifdef FEAT_CLIENTSERVER
12407     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12408 
12409     if (serverid != NULL && !check_restricted() && !check_secure())
12410     {
12411 # ifdef WIN32
12412 	/* The server's HWND is encoded in the 'id' parameter */
12413 	int		n = 0;
12414 
12415 	sscanf(serverid, "%x", &n);
12416 	if (n != 0)
12417 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12418 	if (r == NULL)
12419 # else
12420 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12421 		serverStrToWin(serverid), &r, FALSE) < 0)
12422 # endif
12423 	    EMSG(_("E277: Unable to read a server reply"));
12424     }
12425 #endif
12426     rettv->v_type = VAR_STRING;
12427     rettv->vval.v_string = r;
12428 }
12429 
12430 /*
12431  * "remote_send()" function
12432  */
12433 /*ARGSUSED*/
12434     static void
12435 f_remote_send(argvars, rettv)
12436     typval_T	*argvars;
12437     typval_T	*rettv;
12438 {
12439     rettv->v_type = VAR_STRING;
12440     rettv->vval.v_string = NULL;
12441 #ifdef FEAT_CLIENTSERVER
12442     remote_common(argvars, rettv, FALSE);
12443 #endif
12444 }
12445 
12446 /*
12447  * "remove()" function
12448  */
12449     static void
12450 f_remove(argvars, rettv)
12451     typval_T	*argvars;
12452     typval_T	*rettv;
12453 {
12454     list_T	*l;
12455     listitem_T	*item, *item2;
12456     listitem_T	*li;
12457     long	idx;
12458     long	end;
12459     char_u	*key;
12460     dict_T	*d;
12461     dictitem_T	*di;
12462 
12463     rettv->vval.v_number = 0;
12464     if (argvars[0].v_type == VAR_DICT)
12465     {
12466 	if (argvars[2].v_type != VAR_UNKNOWN)
12467 	    EMSG2(_(e_toomanyarg), "remove()");
12468 	else if ((d = argvars[0].vval.v_dict) != NULL
12469 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12470 	{
12471 	    key = get_tv_string_chk(&argvars[1]);
12472 	    if (key != NULL)
12473 	    {
12474 		di = dict_find(d, key, -1);
12475 		if (di == NULL)
12476 		    EMSG2(_(e_dictkey), key);
12477 		else
12478 		{
12479 		    *rettv = di->di_tv;
12480 		    init_tv(&di->di_tv);
12481 		    dictitem_remove(d, di);
12482 		}
12483 	    }
12484 	}
12485     }
12486     else if (argvars[0].v_type != VAR_LIST)
12487 	EMSG2(_(e_listdictarg), "remove()");
12488     else if ((l = argvars[0].vval.v_list) != NULL
12489 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12490     {
12491 	int	    error = FALSE;
12492 
12493 	idx = get_tv_number_chk(&argvars[1], &error);
12494 	if (error)
12495 	    ;		/* type error: do nothing, errmsg already given */
12496 	else if ((item = list_find(l, idx)) == NULL)
12497 	    EMSGN(_(e_listidx), idx);
12498 	else
12499 	{
12500 	    if (argvars[2].v_type == VAR_UNKNOWN)
12501 	    {
12502 		/* Remove one item, return its value. */
12503 		list_remove(l, item, item);
12504 		*rettv = item->li_tv;
12505 		vim_free(item);
12506 	    }
12507 	    else
12508 	    {
12509 		/* Remove range of items, return list with values. */
12510 		end = get_tv_number_chk(&argvars[2], &error);
12511 		if (error)
12512 		    ;		/* type error: do nothing */
12513 		else if ((item2 = list_find(l, end)) == NULL)
12514 		    EMSGN(_(e_listidx), end);
12515 		else
12516 		{
12517 		    int	    cnt = 0;
12518 
12519 		    for (li = item; li != NULL; li = li->li_next)
12520 		    {
12521 			++cnt;
12522 			if (li == item2)
12523 			    break;
12524 		    }
12525 		    if (li == NULL)  /* didn't find "item2" after "item" */
12526 			EMSG(_(e_invrange));
12527 		    else
12528 		    {
12529 			list_remove(l, item, item2);
12530 			l = list_alloc();
12531 			if (l != NULL)
12532 			{
12533 			    rettv->v_type = VAR_LIST;
12534 			    rettv->vval.v_list = l;
12535 			    l->lv_first = item;
12536 			    l->lv_last = item2;
12537 			    l->lv_refcount = 1;
12538 			    item->li_prev = NULL;
12539 			    item2->li_next = NULL;
12540 			    l->lv_len = cnt;
12541 			}
12542 		    }
12543 		}
12544 	    }
12545 	}
12546     }
12547 }
12548 
12549 /*
12550  * "rename({from}, {to})" function
12551  */
12552     static void
12553 f_rename(argvars, rettv)
12554     typval_T	*argvars;
12555     typval_T	*rettv;
12556 {
12557     char_u	buf[NUMBUFLEN];
12558 
12559     if (check_restricted() || check_secure())
12560 	rettv->vval.v_number = -1;
12561     else
12562 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12563 				      get_tv_string_buf(&argvars[1], buf));
12564 }
12565 
12566 /*
12567  * "repeat()" function
12568  */
12569 /*ARGSUSED*/
12570     static void
12571 f_repeat(argvars, rettv)
12572     typval_T	*argvars;
12573     typval_T	*rettv;
12574 {
12575     char_u	*p;
12576     int		n;
12577     int		slen;
12578     int		len;
12579     char_u	*r;
12580     int		i;
12581     list_T	*l;
12582 
12583     n = get_tv_number(&argvars[1]);
12584     if (argvars[0].v_type == VAR_LIST)
12585     {
12586 	l = list_alloc();
12587 	if (l != NULL && argvars[0].vval.v_list != NULL)
12588 	{
12589 	    l->lv_refcount = 1;
12590 	    while (n-- > 0)
12591 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12592 		    break;
12593 	}
12594 	rettv->v_type = VAR_LIST;
12595 	rettv->vval.v_list = l;
12596     }
12597     else
12598     {
12599 	p = get_tv_string(&argvars[0]);
12600 	rettv->v_type = VAR_STRING;
12601 	rettv->vval.v_string = NULL;
12602 
12603 	slen = (int)STRLEN(p);
12604 	len = slen * n;
12605 	if (len <= 0)
12606 	    return;
12607 
12608 	r = alloc(len + 1);
12609 	if (r != NULL)
12610 	{
12611 	    for (i = 0; i < n; i++)
12612 		mch_memmove(r + i * slen, p, (size_t)slen);
12613 	    r[len] = NUL;
12614 	}
12615 
12616 	rettv->vval.v_string = r;
12617     }
12618 }
12619 
12620 /*
12621  * "resolve()" function
12622  */
12623     static void
12624 f_resolve(argvars, rettv)
12625     typval_T	*argvars;
12626     typval_T	*rettv;
12627 {
12628     char_u	*p;
12629 
12630     p = get_tv_string(&argvars[0]);
12631 #ifdef FEAT_SHORTCUT
12632     {
12633 	char_u	*v = NULL;
12634 
12635 	v = mch_resolve_shortcut(p);
12636 	if (v != NULL)
12637 	    rettv->vval.v_string = v;
12638 	else
12639 	    rettv->vval.v_string = vim_strsave(p);
12640     }
12641 #else
12642 # ifdef HAVE_READLINK
12643     {
12644 	char_u	buf[MAXPATHL + 1];
12645 	char_u	*cpy;
12646 	int	len;
12647 	char_u	*remain = NULL;
12648 	char_u	*q;
12649 	int	is_relative_to_current = FALSE;
12650 	int	has_trailing_pathsep = FALSE;
12651 	int	limit = 100;
12652 
12653 	p = vim_strsave(p);
12654 
12655 	if (p[0] == '.' && (vim_ispathsep(p[1])
12656 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12657 	    is_relative_to_current = TRUE;
12658 
12659 	len = STRLEN(p);
12660 	if (len > 0 && after_pathsep(p, p + len))
12661 	    has_trailing_pathsep = TRUE;
12662 
12663 	q = getnextcomp(p);
12664 	if (*q != NUL)
12665 	{
12666 	    /* Separate the first path component in "p", and keep the
12667 	     * remainder (beginning with the path separator). */
12668 	    remain = vim_strsave(q - 1);
12669 	    q[-1] = NUL;
12670 	}
12671 
12672 	for (;;)
12673 	{
12674 	    for (;;)
12675 	    {
12676 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12677 		if (len <= 0)
12678 		    break;
12679 		buf[len] = NUL;
12680 
12681 		if (limit-- == 0)
12682 		{
12683 		    vim_free(p);
12684 		    vim_free(remain);
12685 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12686 		    rettv->vval.v_string = NULL;
12687 		    goto fail;
12688 		}
12689 
12690 		/* Ensure that the result will have a trailing path separator
12691 		 * if the argument has one. */
12692 		if (remain == NULL && has_trailing_pathsep)
12693 		    add_pathsep(buf);
12694 
12695 		/* Separate the first path component in the link value and
12696 		 * concatenate the remainders. */
12697 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12698 		if (*q != NUL)
12699 		{
12700 		    if (remain == NULL)
12701 			remain = vim_strsave(q - 1);
12702 		    else
12703 		    {
12704 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12705 			if (cpy != NULL)
12706 			{
12707 			    STRCAT(cpy, remain);
12708 			    vim_free(remain);
12709 			    remain = cpy;
12710 			}
12711 		    }
12712 		    q[-1] = NUL;
12713 		}
12714 
12715 		q = gettail(p);
12716 		if (q > p && *q == NUL)
12717 		{
12718 		    /* Ignore trailing path separator. */
12719 		    q[-1] = NUL;
12720 		    q = gettail(p);
12721 		}
12722 		if (q > p && !mch_isFullName(buf))
12723 		{
12724 		    /* symlink is relative to directory of argument */
12725 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12726 		    if (cpy != NULL)
12727 		    {
12728 			STRCPY(cpy, p);
12729 			STRCPY(gettail(cpy), buf);
12730 			vim_free(p);
12731 			p = cpy;
12732 		    }
12733 		}
12734 		else
12735 		{
12736 		    vim_free(p);
12737 		    p = vim_strsave(buf);
12738 		}
12739 	    }
12740 
12741 	    if (remain == NULL)
12742 		break;
12743 
12744 	    /* Append the first path component of "remain" to "p". */
12745 	    q = getnextcomp(remain + 1);
12746 	    len = q - remain - (*q != NUL);
12747 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12748 	    if (cpy != NULL)
12749 	    {
12750 		STRNCAT(cpy, remain, len);
12751 		vim_free(p);
12752 		p = cpy;
12753 	    }
12754 	    /* Shorten "remain". */
12755 	    if (*q != NUL)
12756 		STRCPY(remain, q - 1);
12757 	    else
12758 	    {
12759 		vim_free(remain);
12760 		remain = NULL;
12761 	    }
12762 	}
12763 
12764 	/* If the result is a relative path name, make it explicitly relative to
12765 	 * the current directory if and only if the argument had this form. */
12766 	if (!vim_ispathsep(*p))
12767 	{
12768 	    if (is_relative_to_current
12769 		    && *p != NUL
12770 		    && !(p[0] == '.'
12771 			&& (p[1] == NUL
12772 			    || vim_ispathsep(p[1])
12773 			    || (p[1] == '.'
12774 				&& (p[2] == NUL
12775 				    || vim_ispathsep(p[2]))))))
12776 	    {
12777 		/* Prepend "./". */
12778 		cpy = concat_str((char_u *)"./", p);
12779 		if (cpy != NULL)
12780 		{
12781 		    vim_free(p);
12782 		    p = cpy;
12783 		}
12784 	    }
12785 	    else if (!is_relative_to_current)
12786 	    {
12787 		/* Strip leading "./". */
12788 		q = p;
12789 		while (q[0] == '.' && vim_ispathsep(q[1]))
12790 		    q += 2;
12791 		if (q > p)
12792 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12793 	    }
12794 	}
12795 
12796 	/* Ensure that the result will have no trailing path separator
12797 	 * if the argument had none.  But keep "/" or "//". */
12798 	if (!has_trailing_pathsep)
12799 	{
12800 	    q = p + STRLEN(p);
12801 	    if (after_pathsep(p, q))
12802 		*gettail_sep(p) = NUL;
12803 	}
12804 
12805 	rettv->vval.v_string = p;
12806     }
12807 # else
12808     rettv->vval.v_string = vim_strsave(p);
12809 # endif
12810 #endif
12811 
12812     simplify_filename(rettv->vval.v_string);
12813 
12814 #ifdef HAVE_READLINK
12815 fail:
12816 #endif
12817     rettv->v_type = VAR_STRING;
12818 }
12819 
12820 /*
12821  * "reverse({list})" function
12822  */
12823     static void
12824 f_reverse(argvars, rettv)
12825     typval_T	*argvars;
12826     typval_T	*rettv;
12827 {
12828     list_T	*l;
12829     listitem_T	*li, *ni;
12830 
12831     rettv->vval.v_number = 0;
12832     if (argvars[0].v_type != VAR_LIST)
12833 	EMSG2(_(e_listarg), "reverse()");
12834     else if ((l = argvars[0].vval.v_list) != NULL
12835 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12836     {
12837 	li = l->lv_last;
12838 	l->lv_first = l->lv_last = NULL;
12839 	l->lv_len = 0;
12840 	while (li != NULL)
12841 	{
12842 	    ni = li->li_prev;
12843 	    list_append(l, li);
12844 	    li = ni;
12845 	}
12846 	rettv->vval.v_list = l;
12847 	rettv->v_type = VAR_LIST;
12848 	++l->lv_refcount;
12849     }
12850 }
12851 
12852 #define SP_NOMOVE	1	/* don't move cursor */
12853 #define SP_REPEAT	2	/* repeat to find outer pair */
12854 #define SP_RETCOUNT	4	/* return matchcount */
12855 #define SP_SETPCMARK	8       /* set previous context mark */
12856 
12857 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12858 
12859 /*
12860  * Get flags for a search function.
12861  * Possibly sets "p_ws".
12862  * Returns BACKWARD, FORWARD or zero (for an error).
12863  */
12864     static int
12865 get_search_arg(varp, flagsp)
12866     typval_T	*varp;
12867     int		*flagsp;
12868 {
12869     int		dir = FORWARD;
12870     char_u	*flags;
12871     char_u	nbuf[NUMBUFLEN];
12872     int		mask;
12873 
12874     if (varp->v_type != VAR_UNKNOWN)
12875     {
12876 	flags = get_tv_string_buf_chk(varp, nbuf);
12877 	if (flags == NULL)
12878 	    return 0;		/* type error; errmsg already given */
12879 	while (*flags != NUL)
12880 	{
12881 	    switch (*flags)
12882 	    {
12883 		case 'b': dir = BACKWARD; break;
12884 		case 'w': p_ws = TRUE; break;
12885 		case 'W': p_ws = FALSE; break;
12886 		default:  mask = 0;
12887 			  if (flagsp != NULL)
12888 			     switch (*flags)
12889 			     {
12890 				 case 'n': mask = SP_NOMOVE; break;
12891 				 case 'r': mask = SP_REPEAT; break;
12892 				 case 'm': mask = SP_RETCOUNT; break;
12893 				 case 's': mask = SP_SETPCMARK; break;
12894 			     }
12895 			  if (mask == 0)
12896 			  {
12897 			      EMSG2(_(e_invarg2), flags);
12898 			      dir = 0;
12899 			  }
12900 			  else
12901 			      *flagsp |= mask;
12902 	    }
12903 	    if (dir == 0)
12904 		break;
12905 	    ++flags;
12906 	}
12907     }
12908     return dir;
12909 }
12910 
12911 /*
12912  * "search()" function
12913  */
12914     static void
12915 f_search(argvars, rettv)
12916     typval_T	*argvars;
12917     typval_T	*rettv;
12918 {
12919     char_u	*pat;
12920     pos_T	pos;
12921     pos_T	save_cursor;
12922     int		save_p_ws = p_ws;
12923     int		dir;
12924     int		flags = 0;
12925 
12926     rettv->vval.v_number = 0;	/* default: FAIL */
12927 
12928     pat = get_tv_string(&argvars[0]);
12929     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
12930     if (dir == 0)
12931 	goto theend;
12932     /*
12933      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
12934      * Check to make sure only those flags are set.
12935      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
12936      * flags cannot be set. Check for that condition also.
12937      */
12938     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
12939 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
12940     {
12941 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12942 	goto theend;
12943     }
12944 
12945     pos = save_cursor = curwin->w_cursor;
12946     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
12947 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
12948     {
12949 	rettv->vval.v_number = pos.lnum;
12950 	if (flags & SP_SETPCMARK)
12951 	    setpcmark();
12952 	curwin->w_cursor = pos;
12953 	/* "/$" will put the cursor after the end of the line, may need to
12954 	 * correct that here */
12955 	check_cursor();
12956     }
12957 
12958     /* If 'n' flag is used: restore cursor position. */
12959     if (flags & SP_NOMOVE)
12960 	curwin->w_cursor = save_cursor;
12961 theend:
12962     p_ws = save_p_ws;
12963 }
12964 
12965 /*
12966  * "searchpair()" function
12967  */
12968     static void
12969 f_searchpair(argvars, rettv)
12970     typval_T	*argvars;
12971     typval_T	*rettv;
12972 {
12973     char_u	*spat, *mpat, *epat;
12974     char_u	*skip;
12975     int		save_p_ws = p_ws;
12976     int		dir;
12977     int		flags = 0;
12978     char_u	nbuf1[NUMBUFLEN];
12979     char_u	nbuf2[NUMBUFLEN];
12980     char_u	nbuf3[NUMBUFLEN];
12981 
12982     rettv->vval.v_number = 0;	/* default: FAIL */
12983 
12984     /* Get the three pattern arguments: start, middle, end. */
12985     spat = get_tv_string_chk(&argvars[0]);
12986     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
12987     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
12988     if (spat == NULL || mpat == NULL || epat == NULL)
12989 	goto theend;	    /* type error */
12990 
12991     /* Handle the optional fourth argument: flags */
12992     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
12993     if (dir == 0)
12994 	goto theend;
12995     /*
12996      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
12997      */
12998     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
12999     {
13000 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13001 	goto theend;
13002     }
13003 
13004     /* Optional fifth argument: skip expresion */
13005     if (argvars[3].v_type == VAR_UNKNOWN
13006 	    || argvars[4].v_type == VAR_UNKNOWN)
13007 	skip = (char_u *)"";
13008     else
13009 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13010     if (skip == NULL)
13011 	goto theend;	    /* type error */
13012 
13013     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
13014 
13015 theend:
13016     p_ws = save_p_ws;
13017 }
13018 
13019 /*
13020  * Search for a start/middle/end thing.
13021  * Used by searchpair(), see its documentation for the details.
13022  * Returns 0 or -1 for no match,
13023  */
13024     long
13025 do_searchpair(spat, mpat, epat, dir, skip, flags)
13026     char_u	*spat;	    /* start pattern */
13027     char_u	*mpat;	    /* middle pattern */
13028     char_u	*epat;	    /* end pattern */
13029     int		dir;	    /* BACKWARD or FORWARD */
13030     char_u	*skip;	    /* skip expression */
13031     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
13032 {
13033     char_u	*save_cpo;
13034     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13035     long	retval = 0;
13036     pos_T	pos;
13037     pos_T	firstpos;
13038     pos_T	foundpos;
13039     pos_T	save_cursor;
13040     pos_T	save_pos;
13041     int		n;
13042     int		r;
13043     int		nest = 1;
13044     int		err;
13045 
13046     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13047     save_cpo = p_cpo;
13048     p_cpo = (char_u *)"";
13049 
13050     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13051      * start/middle/end (pat3, for the top pair). */
13052     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13053     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13054     if (pat2 == NULL || pat3 == NULL)
13055 	goto theend;
13056     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13057     if (*mpat == NUL)
13058 	STRCPY(pat3, pat2);
13059     else
13060 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13061 							    spat, epat, mpat);
13062 
13063     save_cursor = curwin->w_cursor;
13064     pos = curwin->w_cursor;
13065     firstpos.lnum = 0;
13066     foundpos.lnum = 0;
13067     pat = pat3;
13068     for (;;)
13069     {
13070 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13071 						      SEARCH_KEEP, RE_SEARCH);
13072 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13073 	    /* didn't find it or found the first match again: FAIL */
13074 	    break;
13075 
13076 	if (firstpos.lnum == 0)
13077 	    firstpos = pos;
13078 	if (equalpos(pos, foundpos))
13079 	{
13080 	    /* Found the same position again.  Can happen with a pattern that
13081 	     * has "\zs" at the end and searching backwards.  Advance one
13082 	     * character and try again. */
13083 	    if (dir == BACKWARD)
13084 		decl(&pos);
13085 	    else
13086 		incl(&pos);
13087 	}
13088 	foundpos = pos;
13089 
13090 	/* If the skip pattern matches, ignore this match. */
13091 	if (*skip != NUL)
13092 	{
13093 	    save_pos = curwin->w_cursor;
13094 	    curwin->w_cursor = pos;
13095 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13096 	    curwin->w_cursor = save_pos;
13097 	    if (err)
13098 	    {
13099 		/* Evaluating {skip} caused an error, break here. */
13100 		curwin->w_cursor = save_cursor;
13101 		retval = -1;
13102 		break;
13103 	    }
13104 	    if (r)
13105 		continue;
13106 	}
13107 
13108 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13109 	{
13110 	    /* Found end when searching backwards or start when searching
13111 	     * forward: nested pair. */
13112 	    ++nest;
13113 	    pat = pat2;		/* nested, don't search for middle */
13114 	}
13115 	else
13116 	{
13117 	    /* Found end when searching forward or start when searching
13118 	     * backward: end of (nested) pair; or found middle in outer pair. */
13119 	    if (--nest == 1)
13120 		pat = pat3;	/* outer level, search for middle */
13121 	}
13122 
13123 	if (nest == 0)
13124 	{
13125 	    /* Found the match: return matchcount or line number. */
13126 	    if (flags & SP_RETCOUNT)
13127 		++retval;
13128 	    else
13129 		retval = pos.lnum;
13130 	    if (flags & SP_SETPCMARK)
13131 		setpcmark();
13132 	    curwin->w_cursor = pos;
13133 	    if (!(flags & SP_REPEAT))
13134 		break;
13135 	    nest = 1;	    /* search for next unmatched */
13136 	}
13137     }
13138 
13139     /* If 'n' flag is used or search failed: restore cursor position. */
13140     if ((flags & SP_NOMOVE) || retval == 0)
13141 	curwin->w_cursor = save_cursor;
13142 
13143 theend:
13144     vim_free(pat2);
13145     vim_free(pat3);
13146     p_cpo = save_cpo;
13147 
13148     return retval;
13149 }
13150 
13151 /*ARGSUSED*/
13152     static void
13153 f_server2client(argvars, rettv)
13154     typval_T	*argvars;
13155     typval_T	*rettv;
13156 {
13157 #ifdef FEAT_CLIENTSERVER
13158     char_u	buf[NUMBUFLEN];
13159     char_u	*server = get_tv_string_chk(&argvars[0]);
13160     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13161 
13162     rettv->vval.v_number = -1;
13163     if (server == NULL || reply == NULL)
13164 	return;
13165     if (check_restricted() || check_secure())
13166 	return;
13167 # ifdef FEAT_X11
13168     if (check_connection() == FAIL)
13169 	return;
13170 # endif
13171 
13172     if (serverSendReply(server, reply) < 0)
13173     {
13174 	EMSG(_("E258: Unable to send to client"));
13175 	return;
13176     }
13177     rettv->vval.v_number = 0;
13178 #else
13179     rettv->vval.v_number = -1;
13180 #endif
13181 }
13182 
13183 /*ARGSUSED*/
13184     static void
13185 f_serverlist(argvars, rettv)
13186     typval_T	*argvars;
13187     typval_T	*rettv;
13188 {
13189     char_u	*r = NULL;
13190 
13191 #ifdef FEAT_CLIENTSERVER
13192 # ifdef WIN32
13193     r = serverGetVimNames();
13194 # else
13195     make_connection();
13196     if (X_DISPLAY != NULL)
13197 	r = serverGetVimNames(X_DISPLAY);
13198 # endif
13199 #endif
13200     rettv->v_type = VAR_STRING;
13201     rettv->vval.v_string = r;
13202 }
13203 
13204 /*
13205  * "setbufvar()" function
13206  */
13207 /*ARGSUSED*/
13208     static void
13209 f_setbufvar(argvars, rettv)
13210     typval_T	*argvars;
13211     typval_T	*rettv;
13212 {
13213     buf_T	*buf;
13214 #ifdef FEAT_AUTOCMD
13215     aco_save_T	aco;
13216 #else
13217     buf_T	*save_curbuf;
13218 #endif
13219     char_u	*varname, *bufvarname;
13220     typval_T	*varp;
13221     char_u	nbuf[NUMBUFLEN];
13222 
13223     rettv->vval.v_number = 0;
13224 
13225     if (check_restricted() || check_secure())
13226 	return;
13227     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13228     varname = get_tv_string_chk(&argvars[1]);
13229     buf = get_buf_tv(&argvars[0]);
13230     varp = &argvars[2];
13231 
13232     if (buf != NULL && varname != NULL && varp != NULL)
13233     {
13234 	/* set curbuf to be our buf, temporarily */
13235 #ifdef FEAT_AUTOCMD
13236 	aucmd_prepbuf(&aco, buf);
13237 #else
13238 	save_curbuf = curbuf;
13239 	curbuf = buf;
13240 #endif
13241 
13242 	if (*varname == '&')
13243 	{
13244 	    long	numval;
13245 	    char_u	*strval;
13246 	    int		error = FALSE;
13247 
13248 	    ++varname;
13249 	    numval = get_tv_number_chk(varp, &error);
13250 	    strval = get_tv_string_buf_chk(varp, nbuf);
13251 	    if (!error && strval != NULL)
13252 		set_option_value(varname, numval, strval, OPT_LOCAL);
13253 	}
13254 	else
13255 	{
13256 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13257 	    if (bufvarname != NULL)
13258 	    {
13259 		STRCPY(bufvarname, "b:");
13260 		STRCPY(bufvarname + 2, varname);
13261 		set_var(bufvarname, varp, TRUE);
13262 		vim_free(bufvarname);
13263 	    }
13264 	}
13265 
13266 	/* reset notion of buffer */
13267 #ifdef FEAT_AUTOCMD
13268 	aucmd_restbuf(&aco);
13269 #else
13270 	curbuf = save_curbuf;
13271 #endif
13272     }
13273 }
13274 
13275 /*
13276  * "setcmdpos()" function
13277  */
13278     static void
13279 f_setcmdpos(argvars, rettv)
13280     typval_T	*argvars;
13281     typval_T	*rettv;
13282 {
13283     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13284 
13285     if (pos >= 0)
13286 	rettv->vval.v_number = set_cmdline_pos(pos);
13287 }
13288 
13289 /*
13290  * "setline()" function
13291  */
13292     static void
13293 f_setline(argvars, rettv)
13294     typval_T	*argvars;
13295     typval_T	*rettv;
13296 {
13297     linenr_T	lnum;
13298     char_u	*line = NULL;
13299     list_T	*l = NULL;
13300     listitem_T	*li = NULL;
13301     long	added = 0;
13302     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13303 
13304     lnum = get_tv_lnum(&argvars[0]);
13305     if (argvars[1].v_type == VAR_LIST)
13306     {
13307 	l = argvars[1].vval.v_list;
13308 	li = l->lv_first;
13309     }
13310     else
13311 	line = get_tv_string_chk(&argvars[1]);
13312 
13313     rettv->vval.v_number = 0;		/* OK */
13314     for (;;)
13315     {
13316 	if (l != NULL)
13317 	{
13318 	    /* list argument, get next string */
13319 	    if (li == NULL)
13320 		break;
13321 	    line = get_tv_string_chk(&li->li_tv);
13322 	    li = li->li_next;
13323 	}
13324 
13325 	rettv->vval.v_number = 1;	/* FAIL */
13326 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13327 	    break;
13328 	if (lnum <= curbuf->b_ml.ml_line_count)
13329 	{
13330 	    /* existing line, replace it */
13331 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13332 	    {
13333 		changed_bytes(lnum, 0);
13334 		check_cursor_col();
13335 		rettv->vval.v_number = 0;	/* OK */
13336 	    }
13337 	}
13338 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13339 	{
13340 	    /* lnum is one past the last line, append the line */
13341 	    ++added;
13342 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13343 		rettv->vval.v_number = 0;	/* OK */
13344 	}
13345 
13346 	if (l == NULL)			/* only one string argument */
13347 	    break;
13348 	++lnum;
13349     }
13350 
13351     if (added > 0)
13352 	appended_lines_mark(lcount, added);
13353 }
13354 
13355 /*
13356  * "setqflist()" function
13357  */
13358 /*ARGSUSED*/
13359     static void
13360 f_setqflist(argvars, rettv)
13361     typval_T	*argvars;
13362     typval_T	*rettv;
13363 {
13364     char_u	*act;
13365     int		action = ' ';
13366 
13367     rettv->vval.v_number = -1;
13368 
13369 #ifdef FEAT_QUICKFIX
13370     if (argvars[0].v_type != VAR_LIST)
13371 	EMSG(_(e_listreq));
13372     else
13373     {
13374 	list_T  *l = argvars[0].vval.v_list;
13375 
13376 	if (argvars[1].v_type == VAR_STRING)
13377 	{
13378 	    act = get_tv_string_chk(&argvars[1]);
13379 	    if (act == NULL)
13380 		return;		/* type error; errmsg already given */
13381 	    if (*act == 'a' || *act == 'r')
13382 		action = *act;
13383 	}
13384 
13385 	if (l != NULL && set_errorlist(l, action) == OK)
13386 	    rettv->vval.v_number = 0;
13387     }
13388 #endif
13389 }
13390 
13391 /*
13392  * "setreg()" function
13393  */
13394     static void
13395 f_setreg(argvars, rettv)
13396     typval_T	*argvars;
13397     typval_T	*rettv;
13398 {
13399     int		regname;
13400     char_u	*strregname;
13401     char_u	*stropt;
13402     char_u	*strval;
13403     int		append;
13404     char_u	yank_type;
13405     long	block_len;
13406 
13407     block_len = -1;
13408     yank_type = MAUTO;
13409     append = FALSE;
13410 
13411     strregname = get_tv_string_chk(argvars);
13412     rettv->vval.v_number = 1;		/* FAIL is default */
13413 
13414     if (strregname == NULL)
13415 	return;		/* type error; errmsg already given */
13416     regname = *strregname;
13417     if (regname == 0 || regname == '@')
13418 	regname = '"';
13419     else if (regname == '=')
13420 	return;
13421 
13422     if (argvars[2].v_type != VAR_UNKNOWN)
13423     {
13424 	stropt = get_tv_string_chk(&argvars[2]);
13425 	if (stropt == NULL)
13426 	    return;		/* type error */
13427 	for (; *stropt != NUL; ++stropt)
13428 	    switch (*stropt)
13429 	    {
13430 		case 'a': case 'A':	/* append */
13431 		    append = TRUE;
13432 		    break;
13433 		case 'v': case 'c':	/* character-wise selection */
13434 		    yank_type = MCHAR;
13435 		    break;
13436 		case 'V': case 'l':	/* line-wise selection */
13437 		    yank_type = MLINE;
13438 		    break;
13439 #ifdef FEAT_VISUAL
13440 		case 'b': case Ctrl_V:	/* block-wise selection */
13441 		    yank_type = MBLOCK;
13442 		    if (VIM_ISDIGIT(stropt[1]))
13443 		    {
13444 			++stropt;
13445 			block_len = getdigits(&stropt) - 1;
13446 			--stropt;
13447 		    }
13448 		    break;
13449 #endif
13450 	    }
13451     }
13452 
13453     strval = get_tv_string_chk(&argvars[1]);
13454     if (strval != NULL)
13455 	write_reg_contents_ex(regname, strval, -1,
13456 						append, yank_type, block_len);
13457     rettv->vval.v_number = 0;
13458 }
13459 
13460 
13461 /*
13462  * "setwinvar(expr)" function
13463  */
13464 /*ARGSUSED*/
13465     static void
13466 f_setwinvar(argvars, rettv)
13467     typval_T	*argvars;
13468     typval_T	*rettv;
13469 {
13470     win_T	*win;
13471 #ifdef FEAT_WINDOWS
13472     win_T	*save_curwin;
13473 #endif
13474     char_u	*varname, *winvarname;
13475     typval_T	*varp;
13476     char_u	nbuf[NUMBUFLEN];
13477 
13478     rettv->vval.v_number = 0;
13479 
13480     if (check_restricted() || check_secure())
13481 	return;
13482     win = find_win_by_nr(&argvars[0]);
13483     varname = get_tv_string_chk(&argvars[1]);
13484     varp = &argvars[2];
13485 
13486     if (win != NULL && varname != NULL && varp != NULL)
13487     {
13488 #ifdef FEAT_WINDOWS
13489 	/* set curwin to be our win, temporarily */
13490 	save_curwin = curwin;
13491 	curwin = win;
13492 	curbuf = curwin->w_buffer;
13493 #endif
13494 
13495 	if (*varname == '&')
13496 	{
13497 	    long	numval;
13498 	    char_u	*strval;
13499 	    int		error = FALSE;
13500 
13501 	    ++varname;
13502 	    numval = get_tv_number_chk(varp, &error);
13503 	    strval = get_tv_string_buf_chk(varp, nbuf);
13504 	    if (!error && strval != NULL)
13505 		set_option_value(varname, numval, strval, OPT_LOCAL);
13506 	}
13507 	else
13508 	{
13509 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13510 	    if (winvarname != NULL)
13511 	    {
13512 		STRCPY(winvarname, "w:");
13513 		STRCPY(winvarname + 2, varname);
13514 		set_var(winvarname, varp, TRUE);
13515 		vim_free(winvarname);
13516 	    }
13517 	}
13518 
13519 #ifdef FEAT_WINDOWS
13520 	/* Restore current window, if it's still valid (autocomands can make
13521 	 * it invalid). */
13522 	if (win_valid(save_curwin))
13523 	{
13524 	    curwin = save_curwin;
13525 	    curbuf = curwin->w_buffer;
13526 	}
13527 #endif
13528     }
13529 }
13530 
13531 /*
13532  * "simplify()" function
13533  */
13534     static void
13535 f_simplify(argvars, rettv)
13536     typval_T	*argvars;
13537     typval_T	*rettv;
13538 {
13539     char_u	*p;
13540 
13541     p = get_tv_string(&argvars[0]);
13542     rettv->vval.v_string = vim_strsave(p);
13543     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13544     rettv->v_type = VAR_STRING;
13545 }
13546 
13547 static int
13548 #ifdef __BORLANDC__
13549     _RTLENTRYF
13550 #endif
13551 	item_compare __ARGS((const void *s1, const void *s2));
13552 static int
13553 #ifdef __BORLANDC__
13554     _RTLENTRYF
13555 #endif
13556 	item_compare2 __ARGS((const void *s1, const void *s2));
13557 
13558 static int	item_compare_ic;
13559 static char_u	*item_compare_func;
13560 static int	item_compare_func_err;
13561 #define ITEM_COMPARE_FAIL 999
13562 
13563 /*
13564  * Compare functions for f_sort() below.
13565  */
13566     static int
13567 #ifdef __BORLANDC__
13568 _RTLENTRYF
13569 #endif
13570 item_compare(s1, s2)
13571     const void	*s1;
13572     const void	*s2;
13573 {
13574     char_u	*p1, *p2;
13575     char_u	*tofree1, *tofree2;
13576     int		res;
13577     char_u	numbuf1[NUMBUFLEN];
13578     char_u	numbuf2[NUMBUFLEN];
13579 
13580     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13581     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13582     if (item_compare_ic)
13583 	res = STRICMP(p1, p2);
13584     else
13585 	res = STRCMP(p1, p2);
13586     vim_free(tofree1);
13587     vim_free(tofree2);
13588     return res;
13589 }
13590 
13591     static int
13592 #ifdef __BORLANDC__
13593 _RTLENTRYF
13594 #endif
13595 item_compare2(s1, s2)
13596     const void	*s1;
13597     const void	*s2;
13598 {
13599     int		res;
13600     typval_T	rettv;
13601     typval_T	argv[2];
13602     int		dummy;
13603 
13604     /* shortcut after failure in previous call; compare all items equal */
13605     if (item_compare_func_err)
13606 	return 0;
13607 
13608     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13609      * in the copy without changing the original list items. */
13610     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13611     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13612 
13613     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13614     res = call_func(item_compare_func, STRLEN(item_compare_func),
13615 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13616     clear_tv(&argv[0]);
13617     clear_tv(&argv[1]);
13618 
13619     if (res == FAIL)
13620 	res = ITEM_COMPARE_FAIL;
13621     else
13622 	/* return value has wrong type */
13623 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13624     if (item_compare_func_err)
13625 	res = ITEM_COMPARE_FAIL;
13626     clear_tv(&rettv);
13627     return res;
13628 }
13629 
13630 /*
13631  * "sort({list})" function
13632  */
13633     static void
13634 f_sort(argvars, rettv)
13635     typval_T	*argvars;
13636     typval_T	*rettv;
13637 {
13638     list_T	*l;
13639     listitem_T	*li;
13640     listitem_T	**ptrs;
13641     long	len;
13642     long	i;
13643 
13644     rettv->vval.v_number = 0;
13645     if (argvars[0].v_type != VAR_LIST)
13646 	EMSG2(_(e_listarg), "sort()");
13647     else
13648     {
13649 	l = argvars[0].vval.v_list;
13650 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13651 	    return;
13652 	rettv->vval.v_list = l;
13653 	rettv->v_type = VAR_LIST;
13654 	++l->lv_refcount;
13655 
13656 	len = list_len(l);
13657 	if (len <= 1)
13658 	    return;	/* short list sorts pretty quickly */
13659 
13660 	item_compare_ic = FALSE;
13661 	item_compare_func = NULL;
13662 	if (argvars[1].v_type != VAR_UNKNOWN)
13663 	{
13664 	    if (argvars[1].v_type == VAR_FUNC)
13665 		item_compare_func = argvars[1].vval.v_string;
13666 	    else
13667 	    {
13668 		int	    error = FALSE;
13669 
13670 		i = get_tv_number_chk(&argvars[1], &error);
13671 		if (error)
13672 		    return;		/* type error; errmsg already given */
13673 		if (i == 1)
13674 		    item_compare_ic = TRUE;
13675 		else
13676 		    item_compare_func = get_tv_string(&argvars[1]);
13677 	    }
13678 	}
13679 
13680 	/* Make an array with each entry pointing to an item in the List. */
13681 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13682 	if (ptrs == NULL)
13683 	    return;
13684 	i = 0;
13685 	for (li = l->lv_first; li != NULL; li = li->li_next)
13686 	    ptrs[i++] = li;
13687 
13688 	item_compare_func_err = FALSE;
13689 	/* test the compare function */
13690 	if (item_compare_func != NULL
13691 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13692 							 == ITEM_COMPARE_FAIL)
13693 	    EMSG(_("E702: Sort compare function failed"));
13694 	else
13695 	{
13696 	    /* Sort the array with item pointers. */
13697 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13698 		    item_compare_func == NULL ? item_compare : item_compare2);
13699 
13700 	    if (!item_compare_func_err)
13701 	    {
13702 		/* Clear the List and append the items in the sorted order. */
13703 		l->lv_first = l->lv_last = NULL;
13704 		l->lv_len = 0;
13705 		for (i = 0; i < len; ++i)
13706 		    list_append(l, ptrs[i]);
13707 	    }
13708 	}
13709 
13710 	vim_free(ptrs);
13711     }
13712 }
13713 
13714 /*
13715  * "soundfold({word})" function
13716  */
13717     static void
13718 f_soundfold(argvars, rettv)
13719     typval_T	*argvars;
13720     typval_T	*rettv;
13721 {
13722     char_u	*s;
13723 
13724     rettv->v_type = VAR_STRING;
13725     s = get_tv_string(&argvars[0]);
13726 #ifdef FEAT_SYN_HL
13727     rettv->vval.v_string = eval_soundfold(s);
13728 #else
13729     rettv->vval.v_string = vim_strsave(s);
13730 #endif
13731 }
13732 
13733 /*
13734  * "spellbadword()" function
13735  */
13736 /* ARGSUSED */
13737     static void
13738 f_spellbadword(argvars, rettv)
13739     typval_T	*argvars;
13740     typval_T	*rettv;
13741 {
13742     int		attr;
13743     char_u	*ptr;
13744     int		len;
13745 
13746     rettv->vval.v_string = NULL;
13747     rettv->v_type = VAR_STRING;
13748 
13749 #ifdef FEAT_SYN_HL
13750     /* Find the start of the badly spelled word. */
13751     if (spell_move_to(FORWARD, TRUE, TRUE) == FAIL)
13752 	return;
13753 
13754     /* Get the length of the word and copy it. */
13755     ptr = ml_get_cursor();
13756     len = spell_check(curwin, ptr, &attr, NULL);
13757     rettv->vval.v_string = vim_strnsave(ptr, len);
13758 #endif
13759 }
13760 
13761 /*
13762  * "spellsuggest()" function
13763  */
13764     static void
13765 f_spellsuggest(argvars, rettv)
13766     typval_T	*argvars;
13767     typval_T	*rettv;
13768 {
13769     char_u	*str;
13770     int		maxcount;
13771     garray_T	ga;
13772     list_T	*l;
13773     listitem_T	*li;
13774     int		i;
13775 
13776     l = list_alloc();
13777     if (l == NULL)
13778 	return;
13779     rettv->v_type = VAR_LIST;
13780     rettv->vval.v_list = l;
13781     ++l->lv_refcount;
13782 
13783 #ifdef FEAT_SYN_HL
13784     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13785     {
13786 	str = get_tv_string(&argvars[0]);
13787 	if (argvars[1].v_type != VAR_UNKNOWN)
13788 	{
13789 	    maxcount = get_tv_number(&argvars[1]);
13790 	    if (maxcount <= 0)
13791 		return;
13792 	}
13793 	else
13794 	    maxcount = 25;
13795 
13796 	spell_suggest_list(&ga, str, maxcount);
13797 
13798 	for (i = 0; i < ga.ga_len; ++i)
13799 	{
13800 	    str = ((char_u **)ga.ga_data)[i];
13801 
13802 	    li = listitem_alloc();
13803 	    if (li == NULL)
13804 		vim_free(str);
13805 	    else
13806 	    {
13807 		li->li_tv.v_type = VAR_STRING;
13808 		li->li_tv.v_lock = 0;
13809 		li->li_tv.vval.v_string = str;
13810 		list_append(l, li);
13811 	    }
13812 	}
13813 	ga_clear(&ga);
13814     }
13815 #endif
13816 }
13817 
13818     static void
13819 f_split(argvars, rettv)
13820     typval_T	*argvars;
13821     typval_T	*rettv;
13822 {
13823     char_u	*str;
13824     char_u	*end;
13825     char_u	*pat = NULL;
13826     regmatch_T	regmatch;
13827     char_u	patbuf[NUMBUFLEN];
13828     char_u	*save_cpo;
13829     int		match;
13830     listitem_T	*ni;
13831     list_T	*l;
13832     colnr_T	col = 0;
13833     int		keepempty = FALSE;
13834     int		typeerr = FALSE;
13835 
13836     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13837     save_cpo = p_cpo;
13838     p_cpo = (char_u *)"";
13839 
13840     str = get_tv_string(&argvars[0]);
13841     if (argvars[1].v_type != VAR_UNKNOWN)
13842     {
13843 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13844 	if (pat == NULL)
13845 	    typeerr = TRUE;
13846 	if (argvars[2].v_type != VAR_UNKNOWN)
13847 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13848     }
13849     if (pat == NULL || *pat == NUL)
13850 	pat = (char_u *)"[\\x01- ]\\+";
13851 
13852     l = list_alloc();
13853     if (l == NULL)
13854 	return;
13855     rettv->v_type = VAR_LIST;
13856     rettv->vval.v_list = l;
13857     ++l->lv_refcount;
13858     if (typeerr)
13859 	return;
13860 
13861     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
13862     if (regmatch.regprog != NULL)
13863     {
13864 	regmatch.rm_ic = FALSE;
13865 	while (*str != NUL || keepempty)
13866 	{
13867 	    if (*str == NUL)
13868 		match = FALSE;	/* empty item at the end */
13869 	    else
13870 		match = vim_regexec_nl(&regmatch, str, col);
13871 	    if (match)
13872 		end = regmatch.startp[0];
13873 	    else
13874 		end = str + STRLEN(str);
13875 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
13876 					  && match && end < regmatch.endp[0]))
13877 	    {
13878 		ni = listitem_alloc();
13879 		if (ni == NULL)
13880 		    break;
13881 		ni->li_tv.v_type = VAR_STRING;
13882 		ni->li_tv.v_lock = 0;
13883 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
13884 		list_append(l, ni);
13885 	    }
13886 	    if (!match)
13887 		break;
13888 	    /* Advance to just after the match. */
13889 	    if (regmatch.endp[0] > str)
13890 		col = 0;
13891 	    else
13892 	    {
13893 		/* Don't get stuck at the same match. */
13894 #ifdef FEAT_MBYTE
13895 		col = (*mb_ptr2len)(regmatch.endp[0]);
13896 #else
13897 		col = 1;
13898 #endif
13899 	    }
13900 	    str = regmatch.endp[0];
13901 	}
13902 
13903 	vim_free(regmatch.regprog);
13904     }
13905 
13906     p_cpo = save_cpo;
13907 }
13908 
13909 #ifdef HAVE_STRFTIME
13910 /*
13911  * "strftime({format}[, {time}])" function
13912  */
13913     static void
13914 f_strftime(argvars, rettv)
13915     typval_T	*argvars;
13916     typval_T	*rettv;
13917 {
13918     char_u	result_buf[256];
13919     struct tm	*curtime;
13920     time_t	seconds;
13921     char_u	*p;
13922 
13923     rettv->v_type = VAR_STRING;
13924 
13925     p = get_tv_string(&argvars[0]);
13926     if (argvars[1].v_type == VAR_UNKNOWN)
13927 	seconds = time(NULL);
13928     else
13929 	seconds = (time_t)get_tv_number(&argvars[1]);
13930     curtime = localtime(&seconds);
13931     /* MSVC returns NULL for an invalid value of seconds. */
13932     if (curtime == NULL)
13933 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
13934     else
13935     {
13936 # ifdef FEAT_MBYTE
13937 	vimconv_T   conv;
13938 	char_u	    *enc;
13939 
13940 	conv.vc_type = CONV_NONE;
13941 	enc = enc_locale();
13942 	convert_setup(&conv, p_enc, enc);
13943 	if (conv.vc_type != CONV_NONE)
13944 	    p = string_convert(&conv, p, NULL);
13945 # endif
13946 	if (p != NULL)
13947 	    (void)strftime((char *)result_buf, sizeof(result_buf),
13948 							  (char *)p, curtime);
13949 	else
13950 	    result_buf[0] = NUL;
13951 
13952 # ifdef FEAT_MBYTE
13953 	if (conv.vc_type != CONV_NONE)
13954 	    vim_free(p);
13955 	convert_setup(&conv, enc, p_enc);
13956 	if (conv.vc_type != CONV_NONE)
13957 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
13958 	else
13959 # endif
13960 	    rettv->vval.v_string = vim_strsave(result_buf);
13961 
13962 # ifdef FEAT_MBYTE
13963 	/* Release conversion descriptors */
13964 	convert_setup(&conv, NULL, NULL);
13965 	vim_free(enc);
13966 # endif
13967     }
13968 }
13969 #endif
13970 
13971 /*
13972  * "stridx()" function
13973  */
13974     static void
13975 f_stridx(argvars, rettv)
13976     typval_T	*argvars;
13977     typval_T	*rettv;
13978 {
13979     char_u	buf[NUMBUFLEN];
13980     char_u	*needle;
13981     char_u	*haystack;
13982     char_u	*save_haystack;
13983     char_u	*pos;
13984     int		start_idx;
13985 
13986     needle = get_tv_string_chk(&argvars[1]);
13987     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
13988     rettv->vval.v_number = -1;
13989     if (needle == NULL || haystack == NULL)
13990 	return;		/* type error; errmsg already given */
13991 
13992     if (argvars[2].v_type != VAR_UNKNOWN)
13993     {
13994 	int	    error = FALSE;
13995 
13996 	start_idx = get_tv_number_chk(&argvars[2], &error);
13997 	if (error || start_idx >= (int)STRLEN(haystack))
13998 	    return;
13999 	if (start_idx >= 0)
14000 	    haystack += start_idx;
14001     }
14002 
14003     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14004     if (pos != NULL)
14005 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14006 }
14007 
14008 /*
14009  * "string()" function
14010  */
14011     static void
14012 f_string(argvars, rettv)
14013     typval_T	*argvars;
14014     typval_T	*rettv;
14015 {
14016     char_u	*tofree;
14017     char_u	numbuf[NUMBUFLEN];
14018 
14019     rettv->v_type = VAR_STRING;
14020     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
14021     if (tofree == NULL)
14022 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14023 }
14024 
14025 /*
14026  * "strlen()" function
14027  */
14028     static void
14029 f_strlen(argvars, rettv)
14030     typval_T	*argvars;
14031     typval_T	*rettv;
14032 {
14033     rettv->vval.v_number = (varnumber_T)(STRLEN(
14034 					      get_tv_string(&argvars[0])));
14035 }
14036 
14037 /*
14038  * "strpart()" function
14039  */
14040     static void
14041 f_strpart(argvars, rettv)
14042     typval_T	*argvars;
14043     typval_T	*rettv;
14044 {
14045     char_u	*p;
14046     int		n;
14047     int		len;
14048     int		slen;
14049     int		error = FALSE;
14050 
14051     p = get_tv_string(&argvars[0]);
14052     slen = (int)STRLEN(p);
14053 
14054     n = get_tv_number_chk(&argvars[1], &error);
14055     if (error)
14056 	len = 0;
14057     else if (argvars[2].v_type != VAR_UNKNOWN)
14058 	len = get_tv_number(&argvars[2]);
14059     else
14060 	len = slen - n;	    /* default len: all bytes that are available. */
14061 
14062     /*
14063      * Only return the overlap between the specified part and the actual
14064      * string.
14065      */
14066     if (n < 0)
14067     {
14068 	len += n;
14069 	n = 0;
14070     }
14071     else if (n > slen)
14072 	n = slen;
14073     if (len < 0)
14074 	len = 0;
14075     else if (n + len > slen)
14076 	len = slen - n;
14077 
14078     rettv->v_type = VAR_STRING;
14079     rettv->vval.v_string = vim_strnsave(p + n, len);
14080 }
14081 
14082 /*
14083  * "strridx()" function
14084  */
14085     static void
14086 f_strridx(argvars, rettv)
14087     typval_T	*argvars;
14088     typval_T	*rettv;
14089 {
14090     char_u	buf[NUMBUFLEN];
14091     char_u	*needle;
14092     char_u	*haystack;
14093     char_u	*rest;
14094     char_u	*lastmatch = NULL;
14095     int		haystack_len, end_idx;
14096 
14097     needle = get_tv_string_chk(&argvars[1]);
14098     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14099     haystack_len = STRLEN(haystack);
14100 
14101     rettv->vval.v_number = -1;
14102     if (needle == NULL || haystack == NULL)
14103 	return;		/* type error; errmsg already given */
14104     if (argvars[2].v_type != VAR_UNKNOWN)
14105     {
14106 	/* Third argument: upper limit for index */
14107 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14108 	if (end_idx < 0)
14109 	    return;	/* can never find a match */
14110     }
14111     else
14112 	end_idx = haystack_len;
14113 
14114     if (*needle == NUL)
14115     {
14116 	/* Empty string matches past the end. */
14117 	lastmatch = haystack + end_idx;
14118     }
14119     else
14120     {
14121 	for (rest = haystack; *rest != '\0'; ++rest)
14122 	{
14123 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14124 	    if (rest == NULL || rest > haystack + end_idx)
14125 		break;
14126 	    lastmatch = rest;
14127 	}
14128     }
14129 
14130     if (lastmatch == NULL)
14131 	rettv->vval.v_number = -1;
14132     else
14133 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14134 }
14135 
14136 /*
14137  * "strtrans()" function
14138  */
14139     static void
14140 f_strtrans(argvars, rettv)
14141     typval_T	*argvars;
14142     typval_T	*rettv;
14143 {
14144     rettv->v_type = VAR_STRING;
14145     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14146 }
14147 
14148 /*
14149  * "submatch()" function
14150  */
14151     static void
14152 f_submatch(argvars, rettv)
14153     typval_T	*argvars;
14154     typval_T	*rettv;
14155 {
14156     rettv->v_type = VAR_STRING;
14157     rettv->vval.v_string =
14158 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14159 }
14160 
14161 /*
14162  * "substitute()" function
14163  */
14164     static void
14165 f_substitute(argvars, rettv)
14166     typval_T	*argvars;
14167     typval_T	*rettv;
14168 {
14169     char_u	patbuf[NUMBUFLEN];
14170     char_u	subbuf[NUMBUFLEN];
14171     char_u	flagsbuf[NUMBUFLEN];
14172 
14173     char_u	*str = get_tv_string_chk(&argvars[0]);
14174     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14175     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14176     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14177 
14178     rettv->v_type = VAR_STRING;
14179     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14180 	rettv->vval.v_string = NULL;
14181     else
14182 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14183 }
14184 
14185 /*
14186  * "synID(lnum, col, trans)" function
14187  */
14188 /*ARGSUSED*/
14189     static void
14190 f_synID(argvars, rettv)
14191     typval_T	*argvars;
14192     typval_T	*rettv;
14193 {
14194     int		id = 0;
14195 #ifdef FEAT_SYN_HL
14196     long	lnum;
14197     long	col;
14198     int		trans;
14199     int		transerr = FALSE;
14200 
14201     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14202     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14203     trans = get_tv_number_chk(&argvars[2], &transerr);
14204 
14205     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14206 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14207 	id = syn_get_id(lnum, (colnr_T)col, trans, NULL);
14208 #endif
14209 
14210     rettv->vval.v_number = id;
14211 }
14212 
14213 /*
14214  * "synIDattr(id, what [, mode])" function
14215  */
14216 /*ARGSUSED*/
14217     static void
14218 f_synIDattr(argvars, rettv)
14219     typval_T	*argvars;
14220     typval_T	*rettv;
14221 {
14222     char_u	*p = NULL;
14223 #ifdef FEAT_SYN_HL
14224     int		id;
14225     char_u	*what;
14226     char_u	*mode;
14227     char_u	modebuf[NUMBUFLEN];
14228     int		modec;
14229 
14230     id = get_tv_number(&argvars[0]);
14231     what = get_tv_string(&argvars[1]);
14232     if (argvars[2].v_type != VAR_UNKNOWN)
14233     {
14234 	mode = get_tv_string_buf(&argvars[2], modebuf);
14235 	modec = TOLOWER_ASC(mode[0]);
14236 	if (modec != 't' && modec != 'c'
14237 #ifdef FEAT_GUI
14238 		&& modec != 'g'
14239 #endif
14240 		)
14241 	    modec = 0;	/* replace invalid with current */
14242     }
14243     else
14244     {
14245 #ifdef FEAT_GUI
14246 	if (gui.in_use)
14247 	    modec = 'g';
14248 	else
14249 #endif
14250 	    if (t_colors > 1)
14251 	    modec = 'c';
14252 	else
14253 	    modec = 't';
14254     }
14255 
14256 
14257     switch (TOLOWER_ASC(what[0]))
14258     {
14259 	case 'b':
14260 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14261 		    p = highlight_color(id, what, modec);
14262 		else					/* bold */
14263 		    p = highlight_has_attr(id, HL_BOLD, modec);
14264 		break;
14265 
14266 	case 'f':					/* fg[#] */
14267 		p = highlight_color(id, what, modec);
14268 		break;
14269 
14270 	case 'i':
14271 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14272 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14273 		else					/* italic */
14274 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14275 		break;
14276 
14277 	case 'n':					/* name */
14278 		p = get_highlight_name(NULL, id - 1);
14279 		break;
14280 
14281 	case 'r':					/* reverse */
14282 		p = highlight_has_attr(id, HL_INVERSE, modec);
14283 		break;
14284 
14285 	case 's':					/* standout */
14286 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14287 		break;
14288 
14289 	case 'u':
14290 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14291 							/* underline */
14292 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14293 		else
14294 							/* undercurl */
14295 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14296 		break;
14297     }
14298 
14299     if (p != NULL)
14300 	p = vim_strsave(p);
14301 #endif
14302     rettv->v_type = VAR_STRING;
14303     rettv->vval.v_string = p;
14304 }
14305 
14306 /*
14307  * "synIDtrans(id)" function
14308  */
14309 /*ARGSUSED*/
14310     static void
14311 f_synIDtrans(argvars, rettv)
14312     typval_T	*argvars;
14313     typval_T	*rettv;
14314 {
14315     int		id;
14316 
14317 #ifdef FEAT_SYN_HL
14318     id = get_tv_number(&argvars[0]);
14319 
14320     if (id > 0)
14321 	id = syn_get_final_id(id);
14322     else
14323 #endif
14324 	id = 0;
14325 
14326     rettv->vval.v_number = id;
14327 }
14328 
14329 /*
14330  * "system()" function
14331  */
14332     static void
14333 f_system(argvars, rettv)
14334     typval_T	*argvars;
14335     typval_T	*rettv;
14336 {
14337     char_u	*res = NULL;
14338     char_u	*p;
14339     char_u	*infile = NULL;
14340     char_u	buf[NUMBUFLEN];
14341     int		err = FALSE;
14342     FILE	*fd;
14343 
14344     if (argvars[1].v_type != VAR_UNKNOWN)
14345     {
14346 	/*
14347 	 * Write the string to a temp file, to be used for input of the shell
14348 	 * command.
14349 	 */
14350 	if ((infile = vim_tempname('i')) == NULL)
14351 	{
14352 	    EMSG(_(e_notmp));
14353 	    return;
14354 	}
14355 
14356 	fd = mch_fopen((char *)infile, WRITEBIN);
14357 	if (fd == NULL)
14358 	{
14359 	    EMSG2(_(e_notopen), infile);
14360 	    goto done;
14361 	}
14362 	p = get_tv_string_buf_chk(&argvars[1], buf);
14363 	if (p == NULL)
14364 	    goto done;		/* type error; errmsg already given */
14365 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14366 	    err = TRUE;
14367 	if (fclose(fd) != 0)
14368 	    err = TRUE;
14369 	if (err)
14370 	{
14371 	    EMSG(_("E677: Error writing temp file"));
14372 	    goto done;
14373 	}
14374     }
14375 
14376     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14377 
14378 #ifdef USE_CR
14379     /* translate <CR> into <NL> */
14380     if (res != NULL)
14381     {
14382 	char_u	*s;
14383 
14384 	for (s = res; *s; ++s)
14385 	{
14386 	    if (*s == CAR)
14387 		*s = NL;
14388 	}
14389     }
14390 #else
14391 # ifdef USE_CRNL
14392     /* translate <CR><NL> into <NL> */
14393     if (res != NULL)
14394     {
14395 	char_u	*s, *d;
14396 
14397 	d = res;
14398 	for (s = res; *s; ++s)
14399 	{
14400 	    if (s[0] == CAR && s[1] == NL)
14401 		++s;
14402 	    *d++ = *s;
14403 	}
14404 	*d = NUL;
14405     }
14406 # endif
14407 #endif
14408 
14409 done:
14410     if (infile != NULL)
14411     {
14412 	mch_remove(infile);
14413 	vim_free(infile);
14414     }
14415     rettv->v_type = VAR_STRING;
14416     rettv->vval.v_string = res;
14417 }
14418 
14419 /*
14420  * "taglist()" function
14421  */
14422     static void
14423 f_taglist(argvars, rettv)
14424     typval_T  *argvars;
14425     typval_T  *rettv;
14426 {
14427     char_u  *tag_pattern;
14428     list_T  *l;
14429 
14430     tag_pattern = get_tv_string(&argvars[0]);
14431 
14432     rettv->vval.v_number = FALSE;
14433     if (*tag_pattern == NUL)
14434 	return;
14435 
14436     l = list_alloc();
14437     if (l != NULL)
14438     {
14439 	if (get_tags(l, tag_pattern) != FAIL)
14440 	{
14441 	    rettv->vval.v_list = l;
14442 	    rettv->v_type = VAR_LIST;
14443 	    ++l->lv_refcount;
14444 	}
14445 	else
14446 	    list_free(l);
14447     }
14448 }
14449 
14450 /*
14451  * "tempname()" function
14452  */
14453 /*ARGSUSED*/
14454     static void
14455 f_tempname(argvars, rettv)
14456     typval_T	*argvars;
14457     typval_T	*rettv;
14458 {
14459     static int	x = 'A';
14460 
14461     rettv->v_type = VAR_STRING;
14462     rettv->vval.v_string = vim_tempname(x);
14463 
14464     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14465      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14466     do
14467     {
14468 	if (x == 'Z')
14469 	    x = '0';
14470 	else if (x == '9')
14471 	    x = 'A';
14472 	else
14473 	{
14474 #ifdef EBCDIC
14475 	    if (x == 'I')
14476 		x = 'J';
14477 	    else if (x == 'R')
14478 		x = 'S';
14479 	    else
14480 #endif
14481 		++x;
14482 	}
14483     } while (x == 'I' || x == 'O');
14484 }
14485 
14486 /*
14487  * "tolower(string)" function
14488  */
14489     static void
14490 f_tolower(argvars, rettv)
14491     typval_T	*argvars;
14492     typval_T	*rettv;
14493 {
14494     char_u	*p;
14495 
14496     p = vim_strsave(get_tv_string(&argvars[0]));
14497     rettv->v_type = VAR_STRING;
14498     rettv->vval.v_string = p;
14499 
14500     if (p != NULL)
14501 	while (*p != NUL)
14502 	{
14503 #ifdef FEAT_MBYTE
14504 	    int		l;
14505 
14506 	    if (enc_utf8)
14507 	    {
14508 		int c, lc;
14509 
14510 		c = utf_ptr2char(p);
14511 		lc = utf_tolower(c);
14512 		l = utf_ptr2len(p);
14513 		/* TODO: reallocate string when byte count changes. */
14514 		if (utf_char2len(lc) == l)
14515 		    utf_char2bytes(lc, p);
14516 		p += l;
14517 	    }
14518 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
14519 		p += l;		/* skip multi-byte character */
14520 	    else
14521 #endif
14522 	    {
14523 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14524 		++p;
14525 	    }
14526 	}
14527 }
14528 
14529 /*
14530  * "toupper(string)" function
14531  */
14532     static void
14533 f_toupper(argvars, rettv)
14534     typval_T	*argvars;
14535     typval_T	*rettv;
14536 {
14537     rettv->v_type = VAR_STRING;
14538     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14539 }
14540 
14541 /*
14542  * "tr(string, fromstr, tostr)" function
14543  */
14544     static void
14545 f_tr(argvars, rettv)
14546     typval_T	*argvars;
14547     typval_T	*rettv;
14548 {
14549     char_u	*instr;
14550     char_u	*fromstr;
14551     char_u	*tostr;
14552     char_u	*p;
14553 #ifdef FEAT_MBYTE
14554     int		inlen;
14555     int		fromlen;
14556     int		tolen;
14557     int		idx;
14558     char_u	*cpstr;
14559     int		cplen;
14560     int		first = TRUE;
14561 #endif
14562     char_u	buf[NUMBUFLEN];
14563     char_u	buf2[NUMBUFLEN];
14564     garray_T	ga;
14565 
14566     instr = get_tv_string(&argvars[0]);
14567     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14568     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14569 
14570     /* Default return value: empty string. */
14571     rettv->v_type = VAR_STRING;
14572     rettv->vval.v_string = NULL;
14573     if (fromstr == NULL || tostr == NULL)
14574 	    return;		/* type error; errmsg already given */
14575     ga_init2(&ga, (int)sizeof(char), 80);
14576 
14577 #ifdef FEAT_MBYTE
14578     if (!has_mbyte)
14579 #endif
14580 	/* not multi-byte: fromstr and tostr must be the same length */
14581 	if (STRLEN(fromstr) != STRLEN(tostr))
14582 	{
14583 #ifdef FEAT_MBYTE
14584 error:
14585 #endif
14586 	    EMSG2(_(e_invarg2), fromstr);
14587 	    ga_clear(&ga);
14588 	    return;
14589 	}
14590 
14591     /* fromstr and tostr have to contain the same number of chars */
14592     while (*instr != NUL)
14593     {
14594 #ifdef FEAT_MBYTE
14595 	if (has_mbyte)
14596 	{
14597 	    inlen = (*mb_ptr2len)(instr);
14598 	    cpstr = instr;
14599 	    cplen = inlen;
14600 	    idx = 0;
14601 	    for (p = fromstr; *p != NUL; p += fromlen)
14602 	    {
14603 		fromlen = (*mb_ptr2len)(p);
14604 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14605 		{
14606 		    for (p = tostr; *p != NUL; p += tolen)
14607 		    {
14608 			tolen = (*mb_ptr2len)(p);
14609 			if (idx-- == 0)
14610 			{
14611 			    cplen = tolen;
14612 			    cpstr = p;
14613 			    break;
14614 			}
14615 		    }
14616 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14617 			goto error;
14618 		    break;
14619 		}
14620 		++idx;
14621 	    }
14622 
14623 	    if (first && cpstr == instr)
14624 	    {
14625 		/* Check that fromstr and tostr have the same number of
14626 		 * (multi-byte) characters.  Done only once when a character
14627 		 * of instr doesn't appear in fromstr. */
14628 		first = FALSE;
14629 		for (p = tostr; *p != NUL; p += tolen)
14630 		{
14631 		    tolen = (*mb_ptr2len)(p);
14632 		    --idx;
14633 		}
14634 		if (idx != 0)
14635 		    goto error;
14636 	    }
14637 
14638 	    ga_grow(&ga, cplen);
14639 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14640 	    ga.ga_len += cplen;
14641 
14642 	    instr += inlen;
14643 	}
14644 	else
14645 #endif
14646 	{
14647 	    /* When not using multi-byte chars we can do it faster. */
14648 	    p = vim_strchr(fromstr, *instr);
14649 	    if (p != NULL)
14650 		ga_append(&ga, tostr[p - fromstr]);
14651 	    else
14652 		ga_append(&ga, *instr);
14653 	    ++instr;
14654 	}
14655     }
14656 
14657     rettv->vval.v_string = ga.ga_data;
14658 }
14659 
14660 /*
14661  * "type(expr)" function
14662  */
14663     static void
14664 f_type(argvars, rettv)
14665     typval_T	*argvars;
14666     typval_T	*rettv;
14667 {
14668     int n;
14669 
14670     switch (argvars[0].v_type)
14671     {
14672 	case VAR_NUMBER: n = 0; break;
14673 	case VAR_STRING: n = 1; break;
14674 	case VAR_FUNC:   n = 2; break;
14675 	case VAR_LIST:   n = 3; break;
14676 	case VAR_DICT:   n = 4; break;
14677 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14678     }
14679     rettv->vval.v_number = n;
14680 }
14681 
14682 /*
14683  * "values(dict)" function
14684  */
14685     static void
14686 f_values(argvars, rettv)
14687     typval_T	*argvars;
14688     typval_T	*rettv;
14689 {
14690     dict_list(argvars, rettv, 1);
14691 }
14692 
14693 /*
14694  * "virtcol(string)" function
14695  */
14696     static void
14697 f_virtcol(argvars, rettv)
14698     typval_T	*argvars;
14699     typval_T	*rettv;
14700 {
14701     colnr_T	vcol = 0;
14702     pos_T	*fp;
14703 
14704     fp = var2fpos(&argvars[0], FALSE);
14705     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14706     {
14707 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14708 	++vcol;
14709     }
14710 
14711     rettv->vval.v_number = vcol;
14712 }
14713 
14714 /*
14715  * "visualmode()" function
14716  */
14717 /*ARGSUSED*/
14718     static void
14719 f_visualmode(argvars, rettv)
14720     typval_T	*argvars;
14721     typval_T	*rettv;
14722 {
14723 #ifdef FEAT_VISUAL
14724     char_u	str[2];
14725 
14726     rettv->v_type = VAR_STRING;
14727     str[0] = curbuf->b_visual_mode_eval;
14728     str[1] = NUL;
14729     rettv->vval.v_string = vim_strsave(str);
14730 
14731     /* A non-zero number or non-empty string argument: reset mode. */
14732     if ((argvars[0].v_type == VAR_NUMBER
14733 		&& argvars[0].vval.v_number != 0)
14734 	    || (argvars[0].v_type == VAR_STRING
14735 		&& *get_tv_string(&argvars[0]) != NUL))
14736 	curbuf->b_visual_mode_eval = NUL;
14737 #else
14738     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14739 #endif
14740 }
14741 
14742 /*
14743  * "winbufnr(nr)" function
14744  */
14745     static void
14746 f_winbufnr(argvars, rettv)
14747     typval_T	*argvars;
14748     typval_T	*rettv;
14749 {
14750     win_T	*wp;
14751 
14752     wp = find_win_by_nr(&argvars[0]);
14753     if (wp == NULL)
14754 	rettv->vval.v_number = -1;
14755     else
14756 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14757 }
14758 
14759 /*
14760  * "wincol()" function
14761  */
14762 /*ARGSUSED*/
14763     static void
14764 f_wincol(argvars, rettv)
14765     typval_T	*argvars;
14766     typval_T	*rettv;
14767 {
14768     validate_cursor();
14769     rettv->vval.v_number = curwin->w_wcol + 1;
14770 }
14771 
14772 /*
14773  * "winheight(nr)" function
14774  */
14775     static void
14776 f_winheight(argvars, rettv)
14777     typval_T	*argvars;
14778     typval_T	*rettv;
14779 {
14780     win_T	*wp;
14781 
14782     wp = find_win_by_nr(&argvars[0]);
14783     if (wp == NULL)
14784 	rettv->vval.v_number = -1;
14785     else
14786 	rettv->vval.v_number = wp->w_height;
14787 }
14788 
14789 /*
14790  * "winline()" function
14791  */
14792 /*ARGSUSED*/
14793     static void
14794 f_winline(argvars, rettv)
14795     typval_T	*argvars;
14796     typval_T	*rettv;
14797 {
14798     validate_cursor();
14799     rettv->vval.v_number = curwin->w_wrow + 1;
14800 }
14801 
14802 /*
14803  * "winnr()" function
14804  */
14805 /* ARGSUSED */
14806     static void
14807 f_winnr(argvars, rettv)
14808     typval_T	*argvars;
14809     typval_T	*rettv;
14810 {
14811     int		nr = 1;
14812 #ifdef FEAT_WINDOWS
14813     win_T	*wp;
14814     win_T	*twin = curwin;
14815     char_u	*arg;
14816 
14817     if (argvars[0].v_type != VAR_UNKNOWN)
14818     {
14819 	arg = get_tv_string_chk(&argvars[0]);
14820 	if (arg == NULL)
14821 	    nr = 0;		/* type error; errmsg already given */
14822 	else if (STRCMP(arg, "$") == 0)
14823 	    twin = lastwin;
14824 	else if (STRCMP(arg, "#") == 0)
14825 	{
14826 	    twin = prevwin;
14827 	    if (prevwin == NULL)
14828 		nr = 0;
14829 	}
14830 	else
14831 	{
14832 	    EMSG2(_(e_invexpr2), arg);
14833 	    nr = 0;
14834 	}
14835     }
14836 
14837     if (nr > 0)
14838 	for (wp = firstwin; wp != twin; wp = wp->w_next)
14839 	    ++nr;
14840 #endif
14841     rettv->vval.v_number = nr;
14842 }
14843 
14844 /*
14845  * "winrestcmd()" function
14846  */
14847 /* ARGSUSED */
14848     static void
14849 f_winrestcmd(argvars, rettv)
14850     typval_T	*argvars;
14851     typval_T	*rettv;
14852 {
14853 #ifdef FEAT_WINDOWS
14854     win_T	*wp;
14855     int		winnr = 1;
14856     garray_T	ga;
14857     char_u	buf[50];
14858 
14859     ga_init2(&ga, (int)sizeof(char), 70);
14860     for (wp = firstwin; wp != NULL; wp = wp->w_next)
14861     {
14862 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
14863 	ga_concat(&ga, buf);
14864 # ifdef FEAT_VERTSPLIT
14865 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
14866 	ga_concat(&ga, buf);
14867 # endif
14868 	++winnr;
14869     }
14870     ga_append(&ga, NUL);
14871 
14872     rettv->vval.v_string = ga.ga_data;
14873 #else
14874     rettv->vval.v_string = NULL;
14875 #endif
14876     rettv->v_type = VAR_STRING;
14877 }
14878 
14879 /*
14880  * "winwidth(nr)" function
14881  */
14882     static void
14883 f_winwidth(argvars, rettv)
14884     typval_T	*argvars;
14885     typval_T	*rettv;
14886 {
14887     win_T	*wp;
14888 
14889     wp = find_win_by_nr(&argvars[0]);
14890     if (wp == NULL)
14891 	rettv->vval.v_number = -1;
14892     else
14893 #ifdef FEAT_VERTSPLIT
14894 	rettv->vval.v_number = wp->w_width;
14895 #else
14896 	rettv->vval.v_number = Columns;
14897 #endif
14898 }
14899 
14900 /*
14901  * "writefile()" function
14902  */
14903     static void
14904 f_writefile(argvars, rettv)
14905     typval_T	*argvars;
14906     typval_T	*rettv;
14907 {
14908     int		binary = FALSE;
14909     char_u	*fname;
14910     FILE	*fd;
14911     listitem_T	*li;
14912     char_u	*s;
14913     int		ret = 0;
14914     int		c;
14915 
14916     if (argvars[0].v_type != VAR_LIST)
14917     {
14918 	EMSG2(_(e_listarg), "writefile()");
14919 	return;
14920     }
14921     if (argvars[0].vval.v_list == NULL)
14922 	return;
14923 
14924     if (argvars[2].v_type != VAR_UNKNOWN
14925 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
14926 	binary = TRUE;
14927 
14928     /* Always open the file in binary mode, library functions have a mind of
14929      * their own about CR-LF conversion. */
14930     fname = get_tv_string(&argvars[1]);
14931     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
14932     {
14933 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
14934 	ret = -1;
14935     }
14936     else
14937     {
14938 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
14939 							     li = li->li_next)
14940 	{
14941 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
14942 	    {
14943 		if (*s == '\n')
14944 		    c = putc(NUL, fd);
14945 		else
14946 		    c = putc(*s, fd);
14947 		if (c == EOF)
14948 		{
14949 		    ret = -1;
14950 		    break;
14951 		}
14952 	    }
14953 	    if (!binary || li->li_next != NULL)
14954 		if (putc('\n', fd) == EOF)
14955 		{
14956 		    ret = -1;
14957 		    break;
14958 		}
14959 	    if (ret < 0)
14960 	    {
14961 		EMSG(_(e_write));
14962 		break;
14963 	    }
14964 	}
14965 	fclose(fd);
14966     }
14967 
14968     rettv->vval.v_number = ret;
14969 }
14970 
14971 /*
14972  * Translate a String variable into a position.
14973  */
14974     static pos_T *
14975 var2fpos(varp, lnum)
14976     typval_T	*varp;
14977     int		lnum;		/* TRUE when $ is last line */
14978 {
14979     char_u	*name;
14980     static pos_T	pos;
14981     pos_T	*pp;
14982 
14983     name = get_tv_string_chk(varp);
14984     if (name == NULL)
14985 	return NULL;
14986     if (name[0] == '.')		/* cursor */
14987 	return &curwin->w_cursor;
14988     if (name[0] == '\'')	/* mark */
14989     {
14990 	pp = getmark(name[1], FALSE);
14991 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
14992 	    return NULL;
14993 	return pp;
14994     }
14995     if (name[0] == '$')		/* last column or line */
14996     {
14997 	if (lnum)
14998 	{
14999 	    pos.lnum = curbuf->b_ml.ml_line_count;
15000 	    pos.col = 0;
15001 	}
15002 	else
15003 	{
15004 	    pos.lnum = curwin->w_cursor.lnum;
15005 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
15006 	}
15007 	return &pos;
15008     }
15009     return NULL;
15010 }
15011 
15012 /*
15013  * Get the length of an environment variable name.
15014  * Advance "arg" to the first character after the name.
15015  * Return 0 for error.
15016  */
15017     static int
15018 get_env_len(arg)
15019     char_u	**arg;
15020 {
15021     char_u	*p;
15022     int		len;
15023 
15024     for (p = *arg; vim_isIDc(*p); ++p)
15025 	;
15026     if (p == *arg)	    /* no name found */
15027 	return 0;
15028 
15029     len = (int)(p - *arg);
15030     *arg = p;
15031     return len;
15032 }
15033 
15034 /*
15035  * Get the length of the name of a function or internal variable.
15036  * "arg" is advanced to the first non-white character after the name.
15037  * Return 0 if something is wrong.
15038  */
15039     static int
15040 get_id_len(arg)
15041     char_u	**arg;
15042 {
15043     char_u	*p;
15044     int		len;
15045 
15046     /* Find the end of the name. */
15047     for (p = *arg; eval_isnamec(*p); ++p)
15048 	;
15049     if (p == *arg)	    /* no name found */
15050 	return 0;
15051 
15052     len = (int)(p - *arg);
15053     *arg = skipwhite(p);
15054 
15055     return len;
15056 }
15057 
15058 /*
15059  * Get the length of the name of a variable or function.
15060  * Only the name is recognized, does not handle ".key" or "[idx]".
15061  * "arg" is advanced to the first non-white character after the name.
15062  * Return -1 if curly braces expansion failed.
15063  * Return 0 if something else is wrong.
15064  * If the name contains 'magic' {}'s, expand them and return the
15065  * expanded name in an allocated string via 'alias' - caller must free.
15066  */
15067     static int
15068 get_name_len(arg, alias, evaluate, verbose)
15069     char_u	**arg;
15070     char_u	**alias;
15071     int		evaluate;
15072     int		verbose;
15073 {
15074     int		len;
15075     char_u	*p;
15076     char_u	*expr_start;
15077     char_u	*expr_end;
15078 
15079     *alias = NULL;  /* default to no alias */
15080 
15081     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
15082 						  && (*arg)[2] == (int)KE_SNR)
15083     {
15084 	/* hard coded <SNR>, already translated */
15085 	*arg += 3;
15086 	return get_id_len(arg) + 3;
15087     }
15088     len = eval_fname_script(*arg);
15089     if (len > 0)
15090     {
15091 	/* literal "<SID>", "s:" or "<SNR>" */
15092 	*arg += len;
15093     }
15094 
15095     /*
15096      * Find the end of the name; check for {} construction.
15097      */
15098     p = find_name_end(*arg, &expr_start, &expr_end,
15099 					       len > 0 ? 0 : FNE_CHECK_START);
15100     if (expr_start != NULL)
15101     {
15102 	char_u	*temp_string;
15103 
15104 	if (!evaluate)
15105 	{
15106 	    len += (int)(p - *arg);
15107 	    *arg = skipwhite(p);
15108 	    return len;
15109 	}
15110 
15111 	/*
15112 	 * Include any <SID> etc in the expanded string:
15113 	 * Thus the -len here.
15114 	 */
15115 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15116 	if (temp_string == NULL)
15117 	    return -1;
15118 	*alias = temp_string;
15119 	*arg = skipwhite(p);
15120 	return (int)STRLEN(temp_string);
15121     }
15122 
15123     len += get_id_len(arg);
15124     if (len == 0 && verbose)
15125 	EMSG2(_(e_invexpr2), *arg);
15126 
15127     return len;
15128 }
15129 
15130 /*
15131  * Find the end of a variable or function name, taking care of magic braces.
15132  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15133  * start and end of the first magic braces item.
15134  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15135  * Return a pointer to just after the name.  Equal to "arg" if there is no
15136  * valid name.
15137  */
15138     static char_u *
15139 find_name_end(arg, expr_start, expr_end, flags)
15140     char_u	*arg;
15141     char_u	**expr_start;
15142     char_u	**expr_end;
15143     int		flags;
15144 {
15145     int		mb_nest = 0;
15146     int		br_nest = 0;
15147     char_u	*p;
15148 
15149     if (expr_start != NULL)
15150     {
15151 	*expr_start = NULL;
15152 	*expr_end = NULL;
15153     }
15154 
15155     /* Quick check for valid starting character. */
15156     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15157 	return arg;
15158 
15159     for (p = arg; *p != NUL
15160 		    && (eval_isnamec(*p)
15161 			|| *p == '{'
15162 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15163 			|| mb_nest != 0
15164 			|| br_nest != 0); mb_ptr_adv(p))
15165     {
15166 	if (*p == '\'')
15167 	{
15168 	    /* skip over 'string' to avoid counting [ and ] inside it. */
15169 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
15170 		;
15171 	    if (*p == NUL)
15172 		break;
15173 	}
15174 	else if (*p == '"')
15175 	{
15176 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
15177 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
15178 		if (*p == '\\' && p[1] != NUL)
15179 		    ++p;
15180 	    if (*p == NUL)
15181 		break;
15182 	}
15183 
15184 	if (mb_nest == 0)
15185 	{
15186 	    if (*p == '[')
15187 		++br_nest;
15188 	    else if (*p == ']')
15189 		--br_nest;
15190 	}
15191 
15192 	if (br_nest == 0)
15193 	{
15194 	    if (*p == '{')
15195 	    {
15196 		mb_nest++;
15197 		if (expr_start != NULL && *expr_start == NULL)
15198 		    *expr_start = p;
15199 	    }
15200 	    else if (*p == '}')
15201 	    {
15202 		mb_nest--;
15203 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15204 		    *expr_end = p;
15205 	    }
15206 	}
15207     }
15208 
15209     return p;
15210 }
15211 
15212 /*
15213  * Expands out the 'magic' {}'s in a variable/function name.
15214  * Note that this can call itself recursively, to deal with
15215  * constructs like foo{bar}{baz}{bam}
15216  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15217  *			"in_start"      ^
15218  *			"expr_start"	   ^
15219  *			"expr_end"		 ^
15220  *			"in_end"			    ^
15221  *
15222  * Returns a new allocated string, which the caller must free.
15223  * Returns NULL for failure.
15224  */
15225     static char_u *
15226 make_expanded_name(in_start, expr_start, expr_end, in_end)
15227     char_u	*in_start;
15228     char_u	*expr_start;
15229     char_u	*expr_end;
15230     char_u	*in_end;
15231 {
15232     char_u	c1;
15233     char_u	*retval = NULL;
15234     char_u	*temp_result;
15235     char_u	*nextcmd = NULL;
15236 
15237     if (expr_end == NULL || in_end == NULL)
15238 	return NULL;
15239     *expr_start	= NUL;
15240     *expr_end = NUL;
15241     c1 = *in_end;
15242     *in_end = NUL;
15243 
15244     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15245     if (temp_result != NULL && nextcmd == NULL)
15246     {
15247 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15248 						   + (in_end - expr_end) + 1));
15249 	if (retval != NULL)
15250 	{
15251 	    STRCPY(retval, in_start);
15252 	    STRCAT(retval, temp_result);
15253 	    STRCAT(retval, expr_end + 1);
15254 	}
15255     }
15256     vim_free(temp_result);
15257 
15258     *in_end = c1;		/* put char back for error messages */
15259     *expr_start = '{';
15260     *expr_end = '}';
15261 
15262     if (retval != NULL)
15263     {
15264 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15265 	if (expr_start != NULL)
15266 	{
15267 	    /* Further expansion! */
15268 	    temp_result = make_expanded_name(retval, expr_start,
15269 						       expr_end, temp_result);
15270 	    vim_free(retval);
15271 	    retval = temp_result;
15272 	}
15273     }
15274 
15275     return retval;
15276 }
15277 
15278 /*
15279  * Return TRUE if character "c" can be used in a variable or function name.
15280  * Does not include '{' or '}' for magic braces.
15281  */
15282     static int
15283 eval_isnamec(c)
15284     int	    c;
15285 {
15286     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15287 }
15288 
15289 /*
15290  * Return TRUE if character "c" can be used as the first character in a
15291  * variable or function name (excluding '{' and '}').
15292  */
15293     static int
15294 eval_isnamec1(c)
15295     int	    c;
15296 {
15297     return (ASCII_ISALPHA(c) || c == '_');
15298 }
15299 
15300 /*
15301  * Set number v: variable to "val".
15302  */
15303     void
15304 set_vim_var_nr(idx, val)
15305     int		idx;
15306     long	val;
15307 {
15308     vimvars[idx].vv_nr = val;
15309 }
15310 
15311 /*
15312  * Get number v: variable value.
15313  */
15314     long
15315 get_vim_var_nr(idx)
15316     int		idx;
15317 {
15318     return vimvars[idx].vv_nr;
15319 }
15320 
15321 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15322 /*
15323  * Get string v: variable value.  Uses a static buffer, can only be used once.
15324  */
15325     char_u *
15326 get_vim_var_str(idx)
15327     int		idx;
15328 {
15329     return get_tv_string(&vimvars[idx].vv_tv);
15330 }
15331 #endif
15332 
15333 /*
15334  * Set v:count, v:count1 and v:prevcount.
15335  */
15336     void
15337 set_vcount(count, count1)
15338     long	count;
15339     long	count1;
15340 {
15341     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15342     vimvars[VV_COUNT].vv_nr = count;
15343     vimvars[VV_COUNT1].vv_nr = count1;
15344 }
15345 
15346 /*
15347  * Set string v: variable to a copy of "val".
15348  */
15349     void
15350 set_vim_var_string(idx, val, len)
15351     int		idx;
15352     char_u	*val;
15353     int		len;	    /* length of "val" to use or -1 (whole string) */
15354 {
15355     /* Need to do this (at least) once, since we can't initialize a union.
15356      * Will always be invoked when "v:progname" is set. */
15357     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15358 
15359     vim_free(vimvars[idx].vv_str);
15360     if (val == NULL)
15361 	vimvars[idx].vv_str = NULL;
15362     else if (len == -1)
15363 	vimvars[idx].vv_str = vim_strsave(val);
15364     else
15365 	vimvars[idx].vv_str = vim_strnsave(val, len);
15366 }
15367 
15368 /*
15369  * Set v:register if needed.
15370  */
15371     void
15372 set_reg_var(c)
15373     int		c;
15374 {
15375     char_u	regname;
15376 
15377     if (c == 0 || c == ' ')
15378 	regname = '"';
15379     else
15380 	regname = c;
15381     /* Avoid free/alloc when the value is already right. */
15382     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15383 	set_vim_var_string(VV_REG, &regname, 1);
15384 }
15385 
15386 /*
15387  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15388  * Otherwise, restore the value to "oldval" and return NULL.
15389  * Must always be called in pairs to save and restore v:exception!  Does not
15390  * take care of memory allocations.
15391  */
15392     char_u *
15393 v_exception(oldval)
15394     char_u	*oldval;
15395 {
15396     if (oldval == NULL)
15397 	return vimvars[VV_EXCEPTION].vv_str;
15398 
15399     vimvars[VV_EXCEPTION].vv_str = oldval;
15400     return NULL;
15401 }
15402 
15403 /*
15404  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15405  * Otherwise, restore the value to "oldval" and return NULL.
15406  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15407  * take care of memory allocations.
15408  */
15409     char_u *
15410 v_throwpoint(oldval)
15411     char_u	*oldval;
15412 {
15413     if (oldval == NULL)
15414 	return vimvars[VV_THROWPOINT].vv_str;
15415 
15416     vimvars[VV_THROWPOINT].vv_str = oldval;
15417     return NULL;
15418 }
15419 
15420 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15421 /*
15422  * Set v:cmdarg.
15423  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15424  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15425  * Must always be called in pairs!
15426  */
15427     char_u *
15428 set_cmdarg(eap, oldarg)
15429     exarg_T	*eap;
15430     char_u	*oldarg;
15431 {
15432     char_u	*oldval;
15433     char_u	*newval;
15434     unsigned	len;
15435 
15436     oldval = vimvars[VV_CMDARG].vv_str;
15437     if (eap == NULL)
15438     {
15439 	vim_free(oldval);
15440 	vimvars[VV_CMDARG].vv_str = oldarg;
15441 	return NULL;
15442     }
15443 
15444     if (eap->force_bin == FORCE_BIN)
15445 	len = 6;
15446     else if (eap->force_bin == FORCE_NOBIN)
15447 	len = 8;
15448     else
15449 	len = 0;
15450     if (eap->force_ff != 0)
15451 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15452 # ifdef FEAT_MBYTE
15453     if (eap->force_enc != 0)
15454 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15455 # endif
15456 
15457     newval = alloc(len + 1);
15458     if (newval == NULL)
15459 	return NULL;
15460 
15461     if (eap->force_bin == FORCE_BIN)
15462 	sprintf((char *)newval, " ++bin");
15463     else if (eap->force_bin == FORCE_NOBIN)
15464 	sprintf((char *)newval, " ++nobin");
15465     else
15466 	*newval = NUL;
15467     if (eap->force_ff != 0)
15468 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15469 						eap->cmd + eap->force_ff);
15470 # ifdef FEAT_MBYTE
15471     if (eap->force_enc != 0)
15472 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15473 					       eap->cmd + eap->force_enc);
15474 # endif
15475     vimvars[VV_CMDARG].vv_str = newval;
15476     return oldval;
15477 }
15478 #endif
15479 
15480 /*
15481  * Get the value of internal variable "name".
15482  * Return OK or FAIL.
15483  */
15484     static int
15485 get_var_tv(name, len, rettv, verbose)
15486     char_u	*name;
15487     int		len;		/* length of "name" */
15488     typval_T	*rettv;		/* NULL when only checking existence */
15489     int		verbose;	/* may give error message */
15490 {
15491     int		ret = OK;
15492     typval_T	*tv = NULL;
15493     typval_T	atv;
15494     dictitem_T	*v;
15495     int		cc;
15496 
15497     /* truncate the name, so that we can use strcmp() */
15498     cc = name[len];
15499     name[len] = NUL;
15500 
15501     /*
15502      * Check for "b:changedtick".
15503      */
15504     if (STRCMP(name, "b:changedtick") == 0)
15505     {
15506 	atv.v_type = VAR_NUMBER;
15507 	atv.vval.v_number = curbuf->b_changedtick;
15508 	tv = &atv;
15509     }
15510 
15511     /*
15512      * Check for user-defined variables.
15513      */
15514     else
15515     {
15516 	v = find_var(name, NULL);
15517 	if (v != NULL)
15518 	    tv = &v->di_tv;
15519     }
15520 
15521     if (tv == NULL)
15522     {
15523 	if (rettv != NULL && verbose)
15524 	    EMSG2(_(e_undefvar), name);
15525 	ret = FAIL;
15526     }
15527     else if (rettv != NULL)
15528 	copy_tv(tv, rettv);
15529 
15530     name[len] = cc;
15531 
15532     return ret;
15533 }
15534 
15535 /*
15536  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15537  * Also handle function call with Funcref variable: func(expr)
15538  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15539  */
15540     static int
15541 handle_subscript(arg, rettv, evaluate, verbose)
15542     char_u	**arg;
15543     typval_T	*rettv;
15544     int		evaluate;	/* do more than finding the end */
15545     int		verbose;	/* give error messages */
15546 {
15547     int		ret = OK;
15548     dict_T	*selfdict = NULL;
15549     char_u	*s;
15550     int		len;
15551     typval_T	functv;
15552 
15553     while (ret == OK
15554 	    && (**arg == '['
15555 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15556 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15557 	    && !vim_iswhite(*(*arg - 1)))
15558     {
15559 	if (**arg == '(')
15560 	{
15561 	    /* need to copy the funcref so that we can clear rettv */
15562 	    functv = *rettv;
15563 	    rettv->v_type = VAR_UNKNOWN;
15564 
15565 	    /* Invoke the function.  Recursive! */
15566 	    s = functv.vval.v_string;
15567 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15568 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15569 			&len, evaluate, selfdict);
15570 
15571 	    /* Clear the funcref afterwards, so that deleting it while
15572 	     * evaluating the arguments is possible (see test55). */
15573 	    clear_tv(&functv);
15574 
15575 	    /* Stop the expression evaluation when immediately aborting on
15576 	     * error, or when an interrupt occurred or an exception was thrown
15577 	     * but not caught. */
15578 	    if (aborting())
15579 	    {
15580 		if (ret == OK)
15581 		    clear_tv(rettv);
15582 		ret = FAIL;
15583 	    }
15584 	    dict_unref(selfdict);
15585 	    selfdict = NULL;
15586 	}
15587 	else /* **arg == '[' || **arg == '.' */
15588 	{
15589 	    dict_unref(selfdict);
15590 	    if (rettv->v_type == VAR_DICT)
15591 	    {
15592 		selfdict = rettv->vval.v_dict;
15593 		if (selfdict != NULL)
15594 		    ++selfdict->dv_refcount;
15595 	    }
15596 	    else
15597 		selfdict = NULL;
15598 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15599 	    {
15600 		clear_tv(rettv);
15601 		ret = FAIL;
15602 	    }
15603 	}
15604     }
15605     dict_unref(selfdict);
15606     return ret;
15607 }
15608 
15609 /*
15610  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15611  * value).
15612  */
15613     static typval_T *
15614 alloc_tv()
15615 {
15616     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15617 }
15618 
15619 /*
15620  * Allocate memory for a variable type-value, and assign a string to it.
15621  * The string "s" must have been allocated, it is consumed.
15622  * Return NULL for out of memory, the variable otherwise.
15623  */
15624     static typval_T *
15625 alloc_string_tv(s)
15626     char_u	*s;
15627 {
15628     typval_T	*rettv;
15629 
15630     rettv = alloc_tv();
15631     if (rettv != NULL)
15632     {
15633 	rettv->v_type = VAR_STRING;
15634 	rettv->vval.v_string = s;
15635     }
15636     else
15637 	vim_free(s);
15638     return rettv;
15639 }
15640 
15641 /*
15642  * Free the memory for a variable type-value.
15643  */
15644     static void
15645 free_tv(varp)
15646     typval_T *varp;
15647 {
15648     if (varp != NULL)
15649     {
15650 	switch (varp->v_type)
15651 	{
15652 	    case VAR_FUNC:
15653 		func_unref(varp->vval.v_string);
15654 		/*FALLTHROUGH*/
15655 	    case VAR_STRING:
15656 		vim_free(varp->vval.v_string);
15657 		break;
15658 	    case VAR_LIST:
15659 		list_unref(varp->vval.v_list);
15660 		break;
15661 	    case VAR_DICT:
15662 		dict_unref(varp->vval.v_dict);
15663 		break;
15664 	    case VAR_NUMBER:
15665 	    case VAR_UNKNOWN:
15666 		break;
15667 	    default:
15668 		EMSG2(_(e_intern2), "free_tv()");
15669 		break;
15670 	}
15671 	vim_free(varp);
15672     }
15673 }
15674 
15675 /*
15676  * Free the memory for a variable value and set the value to NULL or 0.
15677  */
15678     void
15679 clear_tv(varp)
15680     typval_T *varp;
15681 {
15682     if (varp != NULL)
15683     {
15684 	switch (varp->v_type)
15685 	{
15686 	    case VAR_FUNC:
15687 		func_unref(varp->vval.v_string);
15688 		/*FALLTHROUGH*/
15689 	    case VAR_STRING:
15690 		vim_free(varp->vval.v_string);
15691 		varp->vval.v_string = NULL;
15692 		break;
15693 	    case VAR_LIST:
15694 		list_unref(varp->vval.v_list);
15695 		varp->vval.v_list = NULL;
15696 		break;
15697 	    case VAR_DICT:
15698 		dict_unref(varp->vval.v_dict);
15699 		varp->vval.v_dict = NULL;
15700 		break;
15701 	    case VAR_NUMBER:
15702 		varp->vval.v_number = 0;
15703 		break;
15704 	    case VAR_UNKNOWN:
15705 		break;
15706 	    default:
15707 		EMSG2(_(e_intern2), "clear_tv()");
15708 	}
15709 	varp->v_lock = 0;
15710     }
15711 }
15712 
15713 /*
15714  * Set the value of a variable to NULL without freeing items.
15715  */
15716     static void
15717 init_tv(varp)
15718     typval_T *varp;
15719 {
15720     if (varp != NULL)
15721 	vim_memset(varp, 0, sizeof(typval_T));
15722 }
15723 
15724 /*
15725  * Get the number value of a variable.
15726  * If it is a String variable, uses vim_str2nr().
15727  * For incompatible types, return 0.
15728  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15729  * caller of incompatible types: it sets *denote to TRUE if "denote"
15730  * is not NULL or returns -1 otherwise.
15731  */
15732     static long
15733 get_tv_number(varp)
15734     typval_T	*varp;
15735 {
15736     int		error = FALSE;
15737 
15738     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15739 }
15740 
15741     long
15742 get_tv_number_chk(varp, denote)
15743     typval_T	*varp;
15744     int		*denote;
15745 {
15746     long	n = 0L;
15747 
15748     switch (varp->v_type)
15749     {
15750 	case VAR_NUMBER:
15751 	    return (long)(varp->vval.v_number);
15752 	case VAR_FUNC:
15753 	    EMSG(_("E703: Using a Funcref as a number"));
15754 	    break;
15755 	case VAR_STRING:
15756 	    if (varp->vval.v_string != NULL)
15757 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15758 							TRUE, TRUE, &n, NULL);
15759 	    return n;
15760 	case VAR_LIST:
15761 	    EMSG(_("E745: Using a List as a number"));
15762 	    break;
15763 	case VAR_DICT:
15764 	    EMSG(_("E728: Using a Dictionary as a number"));
15765 	    break;
15766 	default:
15767 	    EMSG2(_(e_intern2), "get_tv_number()");
15768 	    break;
15769     }
15770     if (denote == NULL)		/* useful for values that must be unsigned */
15771 	n = -1;
15772     else
15773 	*denote = TRUE;
15774     return n;
15775 }
15776 
15777 /*
15778  * Get the lnum from the first argument.
15779  * Also accepts ".", "$", etc., but that only works for the current buffer.
15780  * Returns -1 on error.
15781  */
15782     static linenr_T
15783 get_tv_lnum(argvars)
15784     typval_T	*argvars;
15785 {
15786     typval_T	rettv;
15787     linenr_T	lnum;
15788 
15789     lnum = get_tv_number_chk(&argvars[0], NULL);
15790     if (lnum == 0)  /* no valid number, try using line() */
15791     {
15792 	rettv.v_type = VAR_NUMBER;
15793 	f_line(argvars, &rettv);
15794 	lnum = rettv.vval.v_number;
15795 	clear_tv(&rettv);
15796     }
15797     return lnum;
15798 }
15799 
15800 /*
15801  * Get the lnum from the first argument.
15802  * Also accepts "$", then "buf" is used.
15803  * Returns 0 on error.
15804  */
15805     static linenr_T
15806 get_tv_lnum_buf(argvars, buf)
15807     typval_T	*argvars;
15808     buf_T	*buf;
15809 {
15810     if (argvars[0].v_type == VAR_STRING
15811 	    && argvars[0].vval.v_string != NULL
15812 	    && argvars[0].vval.v_string[0] == '$'
15813 	    && buf != NULL)
15814 	return buf->b_ml.ml_line_count;
15815     return get_tv_number_chk(&argvars[0], NULL);
15816 }
15817 
15818 /*
15819  * Get the string value of a variable.
15820  * If it is a Number variable, the number is converted into a string.
15821  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
15822  * get_tv_string_buf() uses a given buffer.
15823  * If the String variable has never been set, return an empty string.
15824  * Never returns NULL;
15825  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
15826  * NULL on error.
15827  */
15828     static char_u *
15829 get_tv_string(varp)
15830     typval_T	*varp;
15831 {
15832     static char_u   mybuf[NUMBUFLEN];
15833 
15834     return get_tv_string_buf(varp, mybuf);
15835 }
15836 
15837     static char_u *
15838 get_tv_string_buf(varp, buf)
15839     typval_T	*varp;
15840     char_u	*buf;
15841 {
15842     char_u	*res =  get_tv_string_buf_chk(varp, buf);
15843 
15844     return res != NULL ? res : (char_u *)"";
15845 }
15846 
15847     char_u *
15848 get_tv_string_chk(varp)
15849     typval_T	*varp;
15850 {
15851     static char_u   mybuf[NUMBUFLEN];
15852 
15853     return get_tv_string_buf_chk(varp, mybuf);
15854 }
15855 
15856     static char_u *
15857 get_tv_string_buf_chk(varp, buf)
15858     typval_T	*varp;
15859     char_u	*buf;
15860 {
15861     switch (varp->v_type)
15862     {
15863 	case VAR_NUMBER:
15864 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
15865 	    return buf;
15866 	case VAR_FUNC:
15867 	    EMSG(_("E729: using Funcref as a String"));
15868 	    break;
15869 	case VAR_LIST:
15870 	    EMSG(_("E730: using List as a String"));
15871 	    break;
15872 	case VAR_DICT:
15873 	    EMSG(_("E731: using Dictionary as a String"));
15874 	    break;
15875 	case VAR_STRING:
15876 	    if (varp->vval.v_string != NULL)
15877 		return varp->vval.v_string;
15878 	    return (char_u *)"";
15879 	default:
15880 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
15881 	    break;
15882     }
15883     return NULL;
15884 }
15885 
15886 /*
15887  * Find variable "name" in the list of variables.
15888  * Return a pointer to it if found, NULL if not found.
15889  * Careful: "a:0" variables don't have a name.
15890  * When "htp" is not NULL we are writing to the variable, set "htp" to the
15891  * hashtab_T used.
15892  */
15893     static dictitem_T *
15894 find_var(name, htp)
15895     char_u	*name;
15896     hashtab_T	**htp;
15897 {
15898     char_u	*varname;
15899     hashtab_T	*ht;
15900 
15901     ht = find_var_ht(name, &varname);
15902     if (htp != NULL)
15903 	*htp = ht;
15904     if (ht == NULL)
15905 	return NULL;
15906     return find_var_in_ht(ht, varname, htp != NULL);
15907 }
15908 
15909 /*
15910  * Find variable "varname" in hashtab "ht".
15911  * Returns NULL if not found.
15912  */
15913     static dictitem_T *
15914 find_var_in_ht(ht, varname, writing)
15915     hashtab_T	*ht;
15916     char_u	*varname;
15917     int		writing;
15918 {
15919     hashitem_T	*hi;
15920 
15921     if (*varname == NUL)
15922     {
15923 	/* Must be something like "s:", otherwise "ht" would be NULL. */
15924 	switch (varname[-2])
15925 	{
15926 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
15927 	    case 'g': return &globvars_var;
15928 	    case 'v': return &vimvars_var;
15929 	    case 'b': return &curbuf->b_bufvar;
15930 	    case 'w': return &curwin->w_winvar;
15931 	    case 'l': return current_funccal == NULL
15932 					? NULL : &current_funccal->l_vars_var;
15933 	    case 'a': return current_funccal == NULL
15934 				       ? NULL : &current_funccal->l_avars_var;
15935 	}
15936 	return NULL;
15937     }
15938 
15939     hi = hash_find(ht, varname);
15940     if (HASHITEM_EMPTY(hi))
15941     {
15942 	/* For global variables we may try auto-loading the script.  If it
15943 	 * worked find the variable again.  Don't auto-load a script if it was
15944 	 * loaded already, otherwise it would be loaded every time when
15945 	 * checking if a function name is a Funcref variable. */
15946 	if (ht == &globvarht && !writing
15947 			    && script_autoload(varname, FALSE) && !aborting())
15948 	    hi = hash_find(ht, varname);
15949 	if (HASHITEM_EMPTY(hi))
15950 	    return NULL;
15951     }
15952     return HI2DI(hi);
15953 }
15954 
15955 /*
15956  * Find the hashtab used for a variable name.
15957  * Set "varname" to the start of name without ':'.
15958  */
15959     static hashtab_T *
15960 find_var_ht(name, varname)
15961     char_u  *name;
15962     char_u  **varname;
15963 {
15964     hashitem_T	*hi;
15965 
15966     if (name[1] != ':')
15967     {
15968 	/* The name must not start with a colon or #. */
15969 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
15970 	    return NULL;
15971 	*varname = name;
15972 
15973 	/* "version" is "v:version" in all scopes */
15974 	hi = hash_find(&compat_hashtab, name);
15975 	if (!HASHITEM_EMPTY(hi))
15976 	    return &compat_hashtab;
15977 
15978 	if (current_funccal == NULL)
15979 	    return &globvarht;			/* global variable */
15980 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
15981     }
15982     *varname = name + 2;
15983     if (*name == 'g')				/* global variable */
15984 	return &globvarht;
15985     /* There must be no ':' or '#' in the rest of the name, unless g: is used
15986      */
15987     if (vim_strchr(name + 2, ':') != NULL
15988 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
15989 	return NULL;
15990     if (*name == 'b')				/* buffer variable */
15991 	return &curbuf->b_vars.dv_hashtab;
15992     if (*name == 'w')				/* window variable */
15993 	return &curwin->w_vars.dv_hashtab;
15994     if (*name == 'v')				/* v: variable */
15995 	return &vimvarht;
15996     if (*name == 'a' && current_funccal != NULL) /* function argument */
15997 	return &current_funccal->l_avars.dv_hashtab;
15998     if (*name == 'l' && current_funccal != NULL) /* local function variable */
15999 	return &current_funccal->l_vars.dv_hashtab;
16000     if (*name == 's'				/* script variable */
16001 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
16002 	return &SCRIPT_VARS(current_SID);
16003     return NULL;
16004 }
16005 
16006 /*
16007  * Get the string value of a (global/local) variable.
16008  * Returns NULL when it doesn't exist.
16009  */
16010     char_u *
16011 get_var_value(name)
16012     char_u	*name;
16013 {
16014     dictitem_T	*v;
16015 
16016     v = find_var(name, NULL);
16017     if (v == NULL)
16018 	return NULL;
16019     return get_tv_string(&v->di_tv);
16020 }
16021 
16022 /*
16023  * Allocate a new hashtab for a sourced script.  It will be used while
16024  * sourcing this script and when executing functions defined in the script.
16025  */
16026     void
16027 new_script_vars(id)
16028     scid_T id;
16029 {
16030     int		i;
16031     hashtab_T	*ht;
16032     scriptvar_T *sv;
16033 
16034     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
16035     {
16036 	/* Re-allocating ga_data means that an ht_array pointing to
16037 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
16038 	 * at its init value.  Also reset "v_dict", it's always the same. */
16039 	for (i = 1; i <= ga_scripts.ga_len; ++i)
16040 	{
16041 	    ht = &SCRIPT_VARS(i);
16042 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
16043 		ht->ht_array = ht->ht_smallarray;
16044 	    sv = &SCRIPT_SV(i);
16045 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
16046 	}
16047 
16048 	while (ga_scripts.ga_len < id)
16049 	{
16050 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
16051 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
16052 	    ++ga_scripts.ga_len;
16053 	}
16054     }
16055 }
16056 
16057 /*
16058  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
16059  * point to it.
16060  */
16061     void
16062 init_var_dict(dict, dict_var)
16063     dict_T	*dict;
16064     dictitem_T	*dict_var;
16065 {
16066     hash_init(&dict->dv_hashtab);
16067     dict->dv_refcount = 99999;
16068     dict_var->di_tv.vval.v_dict = dict;
16069     dict_var->di_tv.v_type = VAR_DICT;
16070     dict_var->di_tv.v_lock = VAR_FIXED;
16071     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
16072     dict_var->di_key[0] = NUL;
16073 }
16074 
16075 /*
16076  * Clean up a list of internal variables.
16077  * Frees all allocated variables and the value they contain.
16078  * Clears hashtab "ht", does not free it.
16079  */
16080     void
16081 vars_clear(ht)
16082     hashtab_T *ht;
16083 {
16084     vars_clear_ext(ht, TRUE);
16085 }
16086 
16087 /*
16088  * Like vars_clear(), but only free the value if "free_val" is TRUE.
16089  */
16090     static void
16091 vars_clear_ext(ht, free_val)
16092     hashtab_T	*ht;
16093     int		free_val;
16094 {
16095     int		todo;
16096     hashitem_T	*hi;
16097     dictitem_T	*v;
16098 
16099     hash_lock(ht);
16100     todo = ht->ht_used;
16101     for (hi = ht->ht_array; todo > 0; ++hi)
16102     {
16103 	if (!HASHITEM_EMPTY(hi))
16104 	{
16105 	    --todo;
16106 
16107 	    /* Free the variable.  Don't remove it from the hashtab,
16108 	     * ht_array might change then.  hash_clear() takes care of it
16109 	     * later. */
16110 	    v = HI2DI(hi);
16111 	    if (free_val)
16112 		clear_tv(&v->di_tv);
16113 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
16114 		vim_free(v);
16115 	}
16116     }
16117     hash_clear(ht);
16118     ht->ht_used = 0;
16119 }
16120 
16121 /*
16122  * Delete a variable from hashtab "ht" at item "hi".
16123  * Clear the variable value and free the dictitem.
16124  */
16125     static void
16126 delete_var(ht, hi)
16127     hashtab_T	*ht;
16128     hashitem_T	*hi;
16129 {
16130     dictitem_T	*di = HI2DI(hi);
16131 
16132     hash_remove(ht, hi);
16133     clear_tv(&di->di_tv);
16134     vim_free(di);
16135 }
16136 
16137 /*
16138  * List the value of one internal variable.
16139  */
16140     static void
16141 list_one_var(v, prefix)
16142     dictitem_T	*v;
16143     char_u	*prefix;
16144 {
16145     char_u	*tofree;
16146     char_u	*s;
16147     char_u	numbuf[NUMBUFLEN];
16148 
16149     s = echo_string(&v->di_tv, &tofree, numbuf);
16150     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16151 						s == NULL ? (char_u *)"" : s);
16152     vim_free(tofree);
16153 }
16154 
16155     static void
16156 list_one_var_a(prefix, name, type, string)
16157     char_u	*prefix;
16158     char_u	*name;
16159     int		type;
16160     char_u	*string;
16161 {
16162     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16163     if (name != NULL)	/* "a:" vars don't have a name stored */
16164 	msg_puts(name);
16165     msg_putchar(' ');
16166     msg_advance(22);
16167     if (type == VAR_NUMBER)
16168 	msg_putchar('#');
16169     else if (type == VAR_FUNC)
16170 	msg_putchar('*');
16171     else if (type == VAR_LIST)
16172     {
16173 	msg_putchar('[');
16174 	if (*string == '[')
16175 	    ++string;
16176     }
16177     else if (type == VAR_DICT)
16178     {
16179 	msg_putchar('{');
16180 	if (*string == '{')
16181 	    ++string;
16182     }
16183     else
16184 	msg_putchar(' ');
16185 
16186     msg_outtrans(string);
16187 
16188     if (type == VAR_FUNC)
16189 	msg_puts((char_u *)"()");
16190 }
16191 
16192 /*
16193  * Set variable "name" to value in "tv".
16194  * If the variable already exists, the value is updated.
16195  * Otherwise the variable is created.
16196  */
16197     static void
16198 set_var(name, tv, copy)
16199     char_u	*name;
16200     typval_T	*tv;
16201     int		copy;	    /* make copy of value in "tv" */
16202 {
16203     dictitem_T	*v;
16204     char_u	*varname;
16205     hashtab_T	*ht;
16206     char_u	*p;
16207 
16208     if (tv->v_type == VAR_FUNC)
16209     {
16210 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16211 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16212 							 ? name[2] : name[0]))
16213 	{
16214 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16215 	    return;
16216 	}
16217 	if (function_exists(name))
16218 	{
16219 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16220 									name);
16221 	    return;
16222 	}
16223     }
16224 
16225     ht = find_var_ht(name, &varname);
16226     if (ht == NULL || *varname == NUL)
16227     {
16228 	EMSG2(_(e_illvar), name);
16229 	return;
16230     }
16231 
16232     v = find_var_in_ht(ht, varname, TRUE);
16233     if (v != NULL)
16234     {
16235 	/* existing variable, need to clear the value */
16236 	if (var_check_ro(v->di_flags, name)
16237 				      || tv_check_lock(v->di_tv.v_lock, name))
16238 	    return;
16239 	if (v->di_tv.v_type != tv->v_type
16240 		&& !((v->di_tv.v_type == VAR_STRING
16241 			|| v->di_tv.v_type == VAR_NUMBER)
16242 		    && (tv->v_type == VAR_STRING
16243 			|| tv->v_type == VAR_NUMBER)))
16244 	{
16245 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16246 	    return;
16247 	}
16248 
16249 	/*
16250 	 * Handle setting internal v: variables separately: we don't change
16251 	 * the type.
16252 	 */
16253 	if (ht == &vimvarht)
16254 	{
16255 	    if (v->di_tv.v_type == VAR_STRING)
16256 	    {
16257 		vim_free(v->di_tv.vval.v_string);
16258 		if (copy || tv->v_type != VAR_STRING)
16259 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16260 		else
16261 		{
16262 		    /* Take over the string to avoid an extra alloc/free. */
16263 		    v->di_tv.vval.v_string = tv->vval.v_string;
16264 		    tv->vval.v_string = NULL;
16265 		}
16266 	    }
16267 	    else if (v->di_tv.v_type != VAR_NUMBER)
16268 		EMSG2(_(e_intern2), "set_var()");
16269 	    else
16270 		v->di_tv.vval.v_number = get_tv_number(tv);
16271 	    return;
16272 	}
16273 
16274 	clear_tv(&v->di_tv);
16275     }
16276     else		    /* add a new variable */
16277     {
16278 	/* Make sure the variable name is valid. */
16279 	for (p = varname; *p != NUL; ++p)
16280 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16281 	    {
16282 		EMSG2(_(e_illvar), varname);
16283 		return;
16284 	    }
16285 
16286 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16287 							  + STRLEN(varname)));
16288 	if (v == NULL)
16289 	    return;
16290 	STRCPY(v->di_key, varname);
16291 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16292 	{
16293 	    vim_free(v);
16294 	    return;
16295 	}
16296 	v->di_flags = 0;
16297     }
16298 
16299     if (copy || tv->v_type == VAR_NUMBER)
16300 	copy_tv(tv, &v->di_tv);
16301     else
16302     {
16303 	v->di_tv = *tv;
16304 	v->di_tv.v_lock = 0;
16305 	init_tv(tv);
16306     }
16307 }
16308 
16309 /*
16310  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16311  * Also give an error message.
16312  */
16313     static int
16314 var_check_ro(flags, name)
16315     int		flags;
16316     char_u	*name;
16317 {
16318     if (flags & DI_FLAGS_RO)
16319     {
16320 	EMSG2(_(e_readonlyvar), name);
16321 	return TRUE;
16322     }
16323     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16324     {
16325 	EMSG2(_(e_readonlysbx), name);
16326 	return TRUE;
16327     }
16328     return FALSE;
16329 }
16330 
16331 /*
16332  * Return TRUE if typeval "tv" is set to be locked (immutable).
16333  * Also give an error message, using "name".
16334  */
16335     static int
16336 tv_check_lock(lock, name)
16337     int		lock;
16338     char_u	*name;
16339 {
16340     if (lock & VAR_LOCKED)
16341     {
16342 	EMSG2(_("E741: Value is locked: %s"),
16343 				name == NULL ? (char_u *)_("Unknown") : name);
16344 	return TRUE;
16345     }
16346     if (lock & VAR_FIXED)
16347     {
16348 	EMSG2(_("E742: Cannot change value of %s"),
16349 				name == NULL ? (char_u *)_("Unknown") : name);
16350 	return TRUE;
16351     }
16352     return FALSE;
16353 }
16354 
16355 /*
16356  * Copy the values from typval_T "from" to typval_T "to".
16357  * When needed allocates string or increases reference count.
16358  * Does not make a copy of a list or dict but copies the reference!
16359  */
16360     static void
16361 copy_tv(from, to)
16362     typval_T *from;
16363     typval_T *to;
16364 {
16365     to->v_type = from->v_type;
16366     to->v_lock = 0;
16367     switch (from->v_type)
16368     {
16369 	case VAR_NUMBER:
16370 	    to->vval.v_number = from->vval.v_number;
16371 	    break;
16372 	case VAR_STRING:
16373 	case VAR_FUNC:
16374 	    if (from->vval.v_string == NULL)
16375 		to->vval.v_string = NULL;
16376 	    else
16377 	    {
16378 		to->vval.v_string = vim_strsave(from->vval.v_string);
16379 		if (from->v_type == VAR_FUNC)
16380 		    func_ref(to->vval.v_string);
16381 	    }
16382 	    break;
16383 	case VAR_LIST:
16384 	    if (from->vval.v_list == NULL)
16385 		to->vval.v_list = NULL;
16386 	    else
16387 	    {
16388 		to->vval.v_list = from->vval.v_list;
16389 		++to->vval.v_list->lv_refcount;
16390 	    }
16391 	    break;
16392 	case VAR_DICT:
16393 	    if (from->vval.v_dict == NULL)
16394 		to->vval.v_dict = NULL;
16395 	    else
16396 	    {
16397 		to->vval.v_dict = from->vval.v_dict;
16398 		++to->vval.v_dict->dv_refcount;
16399 	    }
16400 	    break;
16401 	default:
16402 	    EMSG2(_(e_intern2), "copy_tv()");
16403 	    break;
16404     }
16405 }
16406 
16407 /*
16408  * Make a copy of an item.
16409  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16410  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16411  * reference to an already copied list/dict can be used.
16412  * Returns FAIL or OK.
16413  */
16414     static int
16415 item_copy(from, to, deep, copyID)
16416     typval_T	*from;
16417     typval_T	*to;
16418     int		deep;
16419     int		copyID;
16420 {
16421     static int	recurse = 0;
16422     int		ret = OK;
16423 
16424     if (recurse >= DICT_MAXNEST)
16425     {
16426 	EMSG(_("E698: variable nested too deep for making a copy"));
16427 	return FAIL;
16428     }
16429     ++recurse;
16430 
16431     switch (from->v_type)
16432     {
16433 	case VAR_NUMBER:
16434 	case VAR_STRING:
16435 	case VAR_FUNC:
16436 	    copy_tv(from, to);
16437 	    break;
16438 	case VAR_LIST:
16439 	    to->v_type = VAR_LIST;
16440 	    to->v_lock = 0;
16441 	    if (from->vval.v_list == NULL)
16442 		to->vval.v_list = NULL;
16443 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16444 	    {
16445 		/* use the copy made earlier */
16446 		to->vval.v_list = from->vval.v_list->lv_copylist;
16447 		++to->vval.v_list->lv_refcount;
16448 	    }
16449 	    else
16450 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16451 	    if (to->vval.v_list == NULL)
16452 		ret = FAIL;
16453 	    break;
16454 	case VAR_DICT:
16455 	    to->v_type = VAR_DICT;
16456 	    to->v_lock = 0;
16457 	    if (from->vval.v_dict == NULL)
16458 		to->vval.v_dict = NULL;
16459 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16460 	    {
16461 		/* use the copy made earlier */
16462 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16463 		++to->vval.v_dict->dv_refcount;
16464 	    }
16465 	    else
16466 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16467 	    if (to->vval.v_dict == NULL)
16468 		ret = FAIL;
16469 	    break;
16470 	default:
16471 	    EMSG2(_(e_intern2), "item_copy()");
16472 	    ret = FAIL;
16473     }
16474     --recurse;
16475     return ret;
16476 }
16477 
16478 /*
16479  * ":echo expr1 ..."	print each argument separated with a space, add a
16480  *			newline at the end.
16481  * ":echon expr1 ..."	print each argument plain.
16482  */
16483     void
16484 ex_echo(eap)
16485     exarg_T	*eap;
16486 {
16487     char_u	*arg = eap->arg;
16488     typval_T	rettv;
16489     char_u	*tofree;
16490     char_u	*p;
16491     int		needclr = TRUE;
16492     int		atstart = TRUE;
16493     char_u	numbuf[NUMBUFLEN];
16494 
16495     if (eap->skip)
16496 	++emsg_skip;
16497     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16498     {
16499 	p = arg;
16500 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16501 	{
16502 	    /*
16503 	     * Report the invalid expression unless the expression evaluation
16504 	     * has been cancelled due to an aborting error, an interrupt, or an
16505 	     * exception.
16506 	     */
16507 	    if (!aborting())
16508 		EMSG2(_(e_invexpr2), p);
16509 	    break;
16510 	}
16511 	if (!eap->skip)
16512 	{
16513 	    if (atstart)
16514 	    {
16515 		atstart = FALSE;
16516 		/* Call msg_start() after eval1(), evaluating the expression
16517 		 * may cause a message to appear. */
16518 		if (eap->cmdidx == CMD_echo)
16519 		    msg_start();
16520 	    }
16521 	    else if (eap->cmdidx == CMD_echo)
16522 		msg_puts_attr((char_u *)" ", echo_attr);
16523 	    p = echo_string(&rettv, &tofree, numbuf);
16524 	    if (p != NULL)
16525 		for ( ; *p != NUL && !got_int; ++p)
16526 		{
16527 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16528 		    {
16529 			if (*p != TAB && needclr)
16530 			{
16531 			    /* remove any text still there from the command */
16532 			    msg_clr_eos();
16533 			    needclr = FALSE;
16534 			}
16535 			msg_putchar_attr(*p, echo_attr);
16536 		    }
16537 		    else
16538 		    {
16539 #ifdef FEAT_MBYTE
16540 			if (has_mbyte)
16541 			{
16542 			    int i = (*mb_ptr2len)(p);
16543 
16544 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16545 			    p += i - 1;
16546 			}
16547 			else
16548 #endif
16549 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16550 		    }
16551 		}
16552 	    vim_free(tofree);
16553 	}
16554 	clear_tv(&rettv);
16555 	arg = skipwhite(arg);
16556     }
16557     eap->nextcmd = check_nextcmd(arg);
16558 
16559     if (eap->skip)
16560 	--emsg_skip;
16561     else
16562     {
16563 	/* remove text that may still be there from the command */
16564 	if (needclr)
16565 	    msg_clr_eos();
16566 	if (eap->cmdidx == CMD_echo)
16567 	    msg_end();
16568     }
16569 }
16570 
16571 /*
16572  * ":echohl {name}".
16573  */
16574     void
16575 ex_echohl(eap)
16576     exarg_T	*eap;
16577 {
16578     int		id;
16579 
16580     id = syn_name2id(eap->arg);
16581     if (id == 0)
16582 	echo_attr = 0;
16583     else
16584 	echo_attr = syn_id2attr(id);
16585 }
16586 
16587 /*
16588  * ":execute expr1 ..."	execute the result of an expression.
16589  * ":echomsg expr1 ..."	Print a message
16590  * ":echoerr expr1 ..."	Print an error
16591  * Each gets spaces around each argument and a newline at the end for
16592  * echo commands
16593  */
16594     void
16595 ex_execute(eap)
16596     exarg_T	*eap;
16597 {
16598     char_u	*arg = eap->arg;
16599     typval_T	rettv;
16600     int		ret = OK;
16601     char_u	*p;
16602     garray_T	ga;
16603     int		len;
16604     int		save_did_emsg;
16605 
16606     ga_init2(&ga, 1, 80);
16607 
16608     if (eap->skip)
16609 	++emsg_skip;
16610     while (*arg != NUL && *arg != '|' && *arg != '\n')
16611     {
16612 	p = arg;
16613 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16614 	{
16615 	    /*
16616 	     * Report the invalid expression unless the expression evaluation
16617 	     * has been cancelled due to an aborting error, an interrupt, or an
16618 	     * exception.
16619 	     */
16620 	    if (!aborting())
16621 		EMSG2(_(e_invexpr2), p);
16622 	    ret = FAIL;
16623 	    break;
16624 	}
16625 
16626 	if (!eap->skip)
16627 	{
16628 	    p = get_tv_string(&rettv);
16629 	    len = (int)STRLEN(p);
16630 	    if (ga_grow(&ga, len + 2) == FAIL)
16631 	    {
16632 		clear_tv(&rettv);
16633 		ret = FAIL;
16634 		break;
16635 	    }
16636 	    if (ga.ga_len)
16637 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16638 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16639 	    ga.ga_len += len;
16640 	}
16641 
16642 	clear_tv(&rettv);
16643 	arg = skipwhite(arg);
16644     }
16645 
16646     if (ret != FAIL && ga.ga_data != NULL)
16647     {
16648 	if (eap->cmdidx == CMD_echomsg)
16649 	    MSG_ATTR(ga.ga_data, echo_attr);
16650 	else if (eap->cmdidx == CMD_echoerr)
16651 	{
16652 	    /* We don't want to abort following commands, restore did_emsg. */
16653 	    save_did_emsg = did_emsg;
16654 	    EMSG((char_u *)ga.ga_data);
16655 	    if (!force_abort)
16656 		did_emsg = save_did_emsg;
16657 	}
16658 	else if (eap->cmdidx == CMD_execute)
16659 	    do_cmdline((char_u *)ga.ga_data,
16660 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16661     }
16662 
16663     ga_clear(&ga);
16664 
16665     if (eap->skip)
16666 	--emsg_skip;
16667 
16668     eap->nextcmd = check_nextcmd(arg);
16669 }
16670 
16671 /*
16672  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16673  * "arg" points to the "&" or '+' when called, to "option" when returning.
16674  * Returns NULL when no option name found.  Otherwise pointer to the char
16675  * after the option name.
16676  */
16677     static char_u *
16678 find_option_end(arg, opt_flags)
16679     char_u	**arg;
16680     int		*opt_flags;
16681 {
16682     char_u	*p = *arg;
16683 
16684     ++p;
16685     if (*p == 'g' && p[1] == ':')
16686     {
16687 	*opt_flags = OPT_GLOBAL;
16688 	p += 2;
16689     }
16690     else if (*p == 'l' && p[1] == ':')
16691     {
16692 	*opt_flags = OPT_LOCAL;
16693 	p += 2;
16694     }
16695     else
16696 	*opt_flags = 0;
16697 
16698     if (!ASCII_ISALPHA(*p))
16699 	return NULL;
16700     *arg = p;
16701 
16702     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16703 	p += 4;	    /* termcap option */
16704     else
16705 	while (ASCII_ISALPHA(*p))
16706 	    ++p;
16707     return p;
16708 }
16709 
16710 /*
16711  * ":function"
16712  */
16713     void
16714 ex_function(eap)
16715     exarg_T	*eap;
16716 {
16717     char_u	*theline;
16718     int		j;
16719     int		c;
16720     int		saved_did_emsg;
16721     char_u	*name = NULL;
16722     char_u	*p;
16723     char_u	*arg;
16724     garray_T	newargs;
16725     garray_T	newlines;
16726     int		varargs = FALSE;
16727     int		mustend = FALSE;
16728     int		flags = 0;
16729     ufunc_T	*fp;
16730     int		indent;
16731     int		nesting;
16732     char_u	*skip_until = NULL;
16733     dictitem_T	*v;
16734     funcdict_T	fudi;
16735     static int	func_nr = 0;	    /* number for nameless function */
16736     int		paren;
16737     hashtab_T	*ht;
16738     int		todo;
16739     hashitem_T	*hi;
16740 
16741     /*
16742      * ":function" without argument: list functions.
16743      */
16744     if (ends_excmd(*eap->arg))
16745     {
16746 	if (!eap->skip)
16747 	{
16748 	    todo = func_hashtab.ht_used;
16749 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16750 	    {
16751 		if (!HASHITEM_EMPTY(hi))
16752 		{
16753 		    --todo;
16754 		    fp = HI2UF(hi);
16755 		    if (!isdigit(*fp->uf_name))
16756 			list_func_head(fp, FALSE);
16757 		}
16758 	    }
16759 	}
16760 	eap->nextcmd = check_nextcmd(eap->arg);
16761 	return;
16762     }
16763 
16764     /*
16765      * Get the function name.  There are these situations:
16766      * func	    normal function name
16767      *		    "name" == func, "fudi.fd_dict" == NULL
16768      * dict.func    new dictionary entry
16769      *		    "name" == NULL, "fudi.fd_dict" set,
16770      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
16771      * dict.func    existing dict entry with a Funcref
16772      *		    "name" == func, "fudi.fd_dict" set,
16773      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16774      * dict.func    existing dict entry that's not a Funcref
16775      *		    "name" == NULL, "fudi.fd_dict" set,
16776      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16777      */
16778     p = eap->arg;
16779     name = trans_function_name(&p, eap->skip, 0, &fudi);
16780     paren = (vim_strchr(p, '(') != NULL);
16781     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
16782     {
16783 	/*
16784 	 * Return on an invalid expression in braces, unless the expression
16785 	 * evaluation has been cancelled due to an aborting error, an
16786 	 * interrupt, or an exception.
16787 	 */
16788 	if (!aborting())
16789 	{
16790 	    if (!eap->skip && fudi.fd_newkey != NULL)
16791 		EMSG2(_(e_dictkey), fudi.fd_newkey);
16792 	    vim_free(fudi.fd_newkey);
16793 	    return;
16794 	}
16795 	else
16796 	    eap->skip = TRUE;
16797     }
16798     /* An error in a function call during evaluation of an expression in magic
16799      * braces should not cause the function not to be defined. */
16800     saved_did_emsg = did_emsg;
16801     did_emsg = FALSE;
16802 
16803     /*
16804      * ":function func" with only function name: list function.
16805      */
16806     if (!paren)
16807     {
16808 	if (!ends_excmd(*skipwhite(p)))
16809 	{
16810 	    EMSG(_(e_trailing));
16811 	    goto ret_free;
16812 	}
16813 	eap->nextcmd = check_nextcmd(p);
16814 	if (eap->nextcmd != NULL)
16815 	    *p = NUL;
16816 	if (!eap->skip && !got_int)
16817 	{
16818 	    fp = find_func(name);
16819 	    if (fp != NULL)
16820 	    {
16821 		list_func_head(fp, TRUE);
16822 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
16823 		{
16824 		    msg_putchar('\n');
16825 		    msg_outnum((long)(j + 1));
16826 		    if (j < 9)
16827 			msg_putchar(' ');
16828 		    if (j < 99)
16829 			msg_putchar(' ');
16830 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
16831 		    out_flush();	/* show a line at a time */
16832 		    ui_breakcheck();
16833 		}
16834 		if (!got_int)
16835 		{
16836 		    msg_putchar('\n');
16837 		    msg_puts((char_u *)"   endfunction");
16838 		}
16839 	    }
16840 	    else
16841 		emsg_funcname("E123: Undefined function: %s", name);
16842 	}
16843 	goto ret_free;
16844     }
16845 
16846     /*
16847      * ":function name(arg1, arg2)" Define function.
16848      */
16849     p = skipwhite(p);
16850     if (*p != '(')
16851     {
16852 	if (!eap->skip)
16853 	{
16854 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
16855 	    goto ret_free;
16856 	}
16857 	/* attempt to continue by skipping some text */
16858 	if (vim_strchr(p, '(') != NULL)
16859 	    p = vim_strchr(p, '(');
16860     }
16861     p = skipwhite(p + 1);
16862 
16863     ga_init2(&newargs, (int)sizeof(char_u *), 3);
16864     ga_init2(&newlines, (int)sizeof(char_u *), 3);
16865 
16866     if (!eap->skip)
16867     {
16868 	/* Check the name of the function. */
16869 	if (name != NULL)
16870 	    arg = name;
16871 	else
16872 	    arg = fudi.fd_newkey;
16873 	if (arg != NULL)
16874 	{
16875 	    if (*arg == K_SPECIAL)
16876 		j = 3;
16877 	    else
16878 		j = 0;
16879 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
16880 						      : eval_isnamec(arg[j])))
16881 		++j;
16882 	    if (arg[j] != NUL)
16883 		emsg_funcname(_(e_invarg2), arg);
16884 	}
16885     }
16886 
16887     /*
16888      * Isolate the arguments: "arg1, arg2, ...)"
16889      */
16890     while (*p != ')')
16891     {
16892 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
16893 	{
16894 	    varargs = TRUE;
16895 	    p += 3;
16896 	    mustend = TRUE;
16897 	}
16898 	else
16899 	{
16900 	    arg = p;
16901 	    while (ASCII_ISALNUM(*p) || *p == '_')
16902 		++p;
16903 	    if (arg == p || isdigit(*arg)
16904 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
16905 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
16906 	    {
16907 		if (!eap->skip)
16908 		    EMSG2(_("E125: Illegal argument: %s"), arg);
16909 		break;
16910 	    }
16911 	    if (ga_grow(&newargs, 1) == FAIL)
16912 		goto erret;
16913 	    c = *p;
16914 	    *p = NUL;
16915 	    arg = vim_strsave(arg);
16916 	    if (arg == NULL)
16917 		goto erret;
16918 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
16919 	    *p = c;
16920 	    newargs.ga_len++;
16921 	    if (*p == ',')
16922 		++p;
16923 	    else
16924 		mustend = TRUE;
16925 	}
16926 	p = skipwhite(p);
16927 	if (mustend && *p != ')')
16928 	{
16929 	    if (!eap->skip)
16930 		EMSG2(_(e_invarg2), eap->arg);
16931 	    break;
16932 	}
16933     }
16934     ++p;	/* skip the ')' */
16935 
16936     /* find extra arguments "range", "dict" and "abort" */
16937     for (;;)
16938     {
16939 	p = skipwhite(p);
16940 	if (STRNCMP(p, "range", 5) == 0)
16941 	{
16942 	    flags |= FC_RANGE;
16943 	    p += 5;
16944 	}
16945 	else if (STRNCMP(p, "dict", 4) == 0)
16946 	{
16947 	    flags |= FC_DICT;
16948 	    p += 4;
16949 	}
16950 	else if (STRNCMP(p, "abort", 5) == 0)
16951 	{
16952 	    flags |= FC_ABORT;
16953 	    p += 5;
16954 	}
16955 	else
16956 	    break;
16957     }
16958 
16959     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
16960 	EMSG(_(e_trailing));
16961 
16962     /*
16963      * Read the body of the function, until ":endfunction" is found.
16964      */
16965     if (KeyTyped)
16966     {
16967 	/* Check if the function already exists, don't let the user type the
16968 	 * whole function before telling him it doesn't work!  For a script we
16969 	 * need to skip the body to be able to find what follows. */
16970 	if (!eap->skip && !eap->forceit)
16971 	{
16972 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
16973 		EMSG(_(e_funcdict));
16974 	    else if (name != NULL && find_func(name) != NULL)
16975 		emsg_funcname(e_funcexts, name);
16976 	}
16977 
16978 	if (!eap->skip && did_emsg)
16979 	    goto erret;
16980 
16981 	msg_putchar('\n');	    /* don't overwrite the function name */
16982 	cmdline_row = msg_row;
16983     }
16984 
16985     indent = 2;
16986     nesting = 0;
16987     for (;;)
16988     {
16989 	msg_scroll = TRUE;
16990 	need_wait_return = FALSE;
16991 	if (eap->getline == NULL)
16992 	    theline = getcmdline(':', 0L, indent);
16993 	else
16994 	    theline = eap->getline(':', eap->cookie, indent);
16995 	if (KeyTyped)
16996 	    lines_left = Rows - 1;
16997 	if (theline == NULL)
16998 	{
16999 	    EMSG(_("E126: Missing :endfunction"));
17000 	    goto erret;
17001 	}
17002 
17003 	if (skip_until != NULL)
17004 	{
17005 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
17006 	     * don't check for ":endfunc". */
17007 	    if (STRCMP(theline, skip_until) == 0)
17008 	    {
17009 		vim_free(skip_until);
17010 		skip_until = NULL;
17011 	    }
17012 	}
17013 	else
17014 	{
17015 	    /* skip ':' and blanks*/
17016 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
17017 		;
17018 
17019 	    /* Check for "endfunction". */
17020 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
17021 	    {
17022 		vim_free(theline);
17023 		break;
17024 	    }
17025 
17026 	    /* Increase indent inside "if", "while", "for" and "try", decrease
17027 	     * at "end". */
17028 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
17029 		indent -= 2;
17030 	    else if (STRNCMP(p, "if", 2) == 0
17031 		    || STRNCMP(p, "wh", 2) == 0
17032 		    || STRNCMP(p, "for", 3) == 0
17033 		    || STRNCMP(p, "try", 3) == 0)
17034 		indent += 2;
17035 
17036 	    /* Check for defining a function inside this function. */
17037 	    if (checkforcmd(&p, "function", 2))
17038 	    {
17039 		if (*p == '!')
17040 		    p = skipwhite(p + 1);
17041 		p += eval_fname_script(p);
17042 		if (ASCII_ISALPHA(*p))
17043 		{
17044 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
17045 		    if (*skipwhite(p) == '(')
17046 		    {
17047 			++nesting;
17048 			indent += 2;
17049 		    }
17050 		}
17051 	    }
17052 
17053 	    /* Check for ":append" or ":insert". */
17054 	    p = skip_range(p, NULL);
17055 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
17056 		    || (p[0] == 'i'
17057 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
17058 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
17059 		skip_until = vim_strsave((char_u *)".");
17060 
17061 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
17062 	    arg = skipwhite(skiptowhite(p));
17063 	    if (arg[0] == '<' && arg[1] =='<'
17064 		    && ((p[0] == 'p' && p[1] == 'y'
17065 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
17066 			|| (p[0] == 'p' && p[1] == 'e'
17067 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
17068 			|| (p[0] == 't' && p[1] == 'c'
17069 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
17070 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
17071 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
17072 			|| (p[0] == 'm' && p[1] == 'z'
17073 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
17074 			))
17075 	    {
17076 		/* ":python <<" continues until a dot, like ":append" */
17077 		p = skipwhite(arg + 2);
17078 		if (*p == NUL)
17079 		    skip_until = vim_strsave((char_u *)".");
17080 		else
17081 		    skip_until = vim_strsave(p);
17082 	    }
17083 	}
17084 
17085 	/* Add the line to the function. */
17086 	if (ga_grow(&newlines, 1) == FAIL)
17087 	{
17088 	    vim_free(theline);
17089 	    goto erret;
17090 	}
17091 
17092 	/* Copy the line to newly allocated memory.  get_one_sourceline()
17093 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
17094 	 * is an extra alloc/free. */
17095 	p = vim_strsave(theline);
17096 	if (p != NULL)
17097 	{
17098 	    vim_free(theline);
17099 	    theline = p;
17100 	}
17101 
17102 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
17103 	newlines.ga_len++;
17104     }
17105 
17106     /* Don't define the function when skipping commands or when an error was
17107      * detected. */
17108     if (eap->skip || did_emsg)
17109 	goto erret;
17110 
17111     /*
17112      * If there are no errors, add the function
17113      */
17114     if (fudi.fd_dict == NULL)
17115     {
17116 	v = find_var(name, &ht);
17117 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
17118 	{
17119 	    emsg_funcname("E707: Function name conflicts with variable: %s",
17120 									name);
17121 	    goto erret;
17122 	}
17123 
17124 	fp = find_func(name);
17125 	if (fp != NULL)
17126 	{
17127 	    if (!eap->forceit)
17128 	    {
17129 		emsg_funcname(e_funcexts, name);
17130 		goto erret;
17131 	    }
17132 	    if (fp->uf_calls > 0)
17133 	    {
17134 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
17135 									name);
17136 		goto erret;
17137 	    }
17138 	    /* redefine existing function */
17139 	    ga_clear_strings(&(fp->uf_args));
17140 	    ga_clear_strings(&(fp->uf_lines));
17141 	    vim_free(name);
17142 	    name = NULL;
17143 	}
17144     }
17145     else
17146     {
17147 	char	numbuf[20];
17148 
17149 	fp = NULL;
17150 	if (fudi.fd_newkey == NULL && !eap->forceit)
17151 	{
17152 	    EMSG(_(e_funcdict));
17153 	    goto erret;
17154 	}
17155 	if (fudi.fd_di == NULL)
17156 	{
17157 	    /* Can't add a function to a locked dictionary */
17158 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17159 		goto erret;
17160 	}
17161 	    /* Can't change an existing function if it is locked */
17162 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17163 	    goto erret;
17164 
17165 	/* Give the function a sequential number.  Can only be used with a
17166 	 * Funcref! */
17167 	vim_free(name);
17168 	sprintf(numbuf, "%d", ++func_nr);
17169 	name = vim_strsave((char_u *)numbuf);
17170 	if (name == NULL)
17171 	    goto erret;
17172     }
17173 
17174     if (fp == NULL)
17175     {
17176 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17177 	{
17178 	    int	    slen, plen;
17179 	    char_u  *scriptname;
17180 
17181 	    /* Check that the autoload name matches the script name. */
17182 	    j = FAIL;
17183 	    if (sourcing_name != NULL)
17184 	    {
17185 		scriptname = autoload_name(name);
17186 		if (scriptname != NULL)
17187 		{
17188 		    p = vim_strchr(scriptname, '/');
17189 		    plen = STRLEN(p);
17190 		    slen = STRLEN(sourcing_name);
17191 		    if (slen > plen && fnamecmp(p,
17192 					    sourcing_name + slen - plen) == 0)
17193 			j = OK;
17194 		    vim_free(scriptname);
17195 		}
17196 	    }
17197 	    if (j == FAIL)
17198 	    {
17199 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17200 		goto erret;
17201 	    }
17202 	}
17203 
17204 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17205 	if (fp == NULL)
17206 	    goto erret;
17207 
17208 	if (fudi.fd_dict != NULL)
17209 	{
17210 	    if (fudi.fd_di == NULL)
17211 	    {
17212 		/* add new dict entry */
17213 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17214 		if (fudi.fd_di == NULL)
17215 		{
17216 		    vim_free(fp);
17217 		    goto erret;
17218 		}
17219 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17220 		{
17221 		    vim_free(fudi.fd_di);
17222 		    goto erret;
17223 		}
17224 	    }
17225 	    else
17226 		/* overwrite existing dict entry */
17227 		clear_tv(&fudi.fd_di->di_tv);
17228 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17229 	    fudi.fd_di->di_tv.v_lock = 0;
17230 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17231 	    fp->uf_refcount = 1;
17232 	}
17233 
17234 	/* insert the new function in the function list */
17235 	STRCPY(fp->uf_name, name);
17236 	hash_add(&func_hashtab, UF2HIKEY(fp));
17237     }
17238     fp->uf_args = newargs;
17239     fp->uf_lines = newlines;
17240 #ifdef FEAT_PROFILE
17241     fp->uf_tml_count = NULL;
17242     fp->uf_tml_total = NULL;
17243     fp->uf_tml_self = NULL;
17244     fp->uf_profiling = FALSE;
17245     if (prof_def_func())
17246 	func_do_profile(fp);
17247 #endif
17248     fp->uf_varargs = varargs;
17249     fp->uf_flags = flags;
17250     fp->uf_calls = 0;
17251     fp->uf_script_ID = current_SID;
17252     goto ret_free;
17253 
17254 erret:
17255     ga_clear_strings(&newargs);
17256     ga_clear_strings(&newlines);
17257 ret_free:
17258     vim_free(skip_until);
17259     vim_free(fudi.fd_newkey);
17260     vim_free(name);
17261     did_emsg |= saved_did_emsg;
17262 }
17263 
17264 /*
17265  * Get a function name, translating "<SID>" and "<SNR>".
17266  * Also handles a Funcref in a List or Dictionary.
17267  * Returns the function name in allocated memory, or NULL for failure.
17268  * flags:
17269  * TFN_INT:   internal function name OK
17270  * TFN_QUIET: be quiet
17271  * Advances "pp" to just after the function name (if no error).
17272  */
17273     static char_u *
17274 trans_function_name(pp, skip, flags, fdp)
17275     char_u	**pp;
17276     int		skip;		/* only find the end, don't evaluate */
17277     int		flags;
17278     funcdict_T	*fdp;		/* return: info about dictionary used */
17279 {
17280     char_u	*name = NULL;
17281     char_u	*start;
17282     char_u	*end;
17283     int		lead;
17284     char_u	sid_buf[20];
17285     int		len;
17286     lval_T	lv;
17287 
17288     if (fdp != NULL)
17289 	vim_memset(fdp, 0, sizeof(funcdict_T));
17290     start = *pp;
17291 
17292     /* Check for hard coded <SNR>: already translated function ID (from a user
17293      * command). */
17294     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17295 						   && (*pp)[2] == (int)KE_SNR)
17296     {
17297 	*pp += 3;
17298 	len = get_id_len(pp) + 3;
17299 	return vim_strnsave(start, len);
17300     }
17301 
17302     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17303      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17304     lead = eval_fname_script(start);
17305     if (lead > 2)
17306 	start += lead;
17307 
17308     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17309 					      lead > 2 ? 0 : FNE_CHECK_START);
17310     if (end == start)
17311     {
17312 	if (!skip)
17313 	    EMSG(_("E129: Function name required"));
17314 	goto theend;
17315     }
17316     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17317     {
17318 	/*
17319 	 * Report an invalid expression in braces, unless the expression
17320 	 * evaluation has been cancelled due to an aborting error, an
17321 	 * interrupt, or an exception.
17322 	 */
17323 	if (!aborting())
17324 	{
17325 	    if (end != NULL)
17326 		EMSG2(_(e_invarg2), start);
17327 	}
17328 	else
17329 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17330 	goto theend;
17331     }
17332 
17333     if (lv.ll_tv != NULL)
17334     {
17335 	if (fdp != NULL)
17336 	{
17337 	    fdp->fd_dict = lv.ll_dict;
17338 	    fdp->fd_newkey = lv.ll_newkey;
17339 	    lv.ll_newkey = NULL;
17340 	    fdp->fd_di = lv.ll_di;
17341 	}
17342 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17343 	{
17344 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17345 	    *pp = end;
17346 	}
17347 	else
17348 	{
17349 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17350 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17351 		EMSG(_(e_funcref));
17352 	    else
17353 		*pp = end;
17354 	    name = NULL;
17355 	}
17356 	goto theend;
17357     }
17358 
17359     if (lv.ll_name == NULL)
17360     {
17361 	/* Error found, but continue after the function name. */
17362 	*pp = end;
17363 	goto theend;
17364     }
17365 
17366     if (lv.ll_exp_name != NULL)
17367 	len = STRLEN(lv.ll_exp_name);
17368     else
17369     {
17370 	if (lead == 2)	/* skip over "s:" */
17371 	    lv.ll_name += 2;
17372 	len = (int)(end - lv.ll_name);
17373     }
17374 
17375     /*
17376      * Copy the function name to allocated memory.
17377      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17378      * Accept <SNR>123_name() outside a script.
17379      */
17380     if (skip)
17381 	lead = 0;	/* do nothing */
17382     else if (lead > 0)
17383     {
17384 	lead = 3;
17385 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17386 	{
17387 	    if (current_SID <= 0)
17388 	    {
17389 		EMSG(_(e_usingsid));
17390 		goto theend;
17391 	    }
17392 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17393 	    lead += (int)STRLEN(sid_buf);
17394 	}
17395     }
17396     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17397     {
17398 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17399 	goto theend;
17400     }
17401     name = alloc((unsigned)(len + lead + 1));
17402     if (name != NULL)
17403     {
17404 	if (lead > 0)
17405 	{
17406 	    name[0] = K_SPECIAL;
17407 	    name[1] = KS_EXTRA;
17408 	    name[2] = (int)KE_SNR;
17409 	    if (lead > 3)	/* If it's "<SID>" */
17410 		STRCPY(name + 3, sid_buf);
17411 	}
17412 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17413 	name[len + lead] = NUL;
17414     }
17415     *pp = end;
17416 
17417 theend:
17418     clear_lval(&lv);
17419     return name;
17420 }
17421 
17422 /*
17423  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17424  * Return 2 if "p" starts with "s:".
17425  * Return 0 otherwise.
17426  */
17427     static int
17428 eval_fname_script(p)
17429     char_u	*p;
17430 {
17431     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17432 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17433 	return 5;
17434     if (p[0] == 's' && p[1] == ':')
17435 	return 2;
17436     return 0;
17437 }
17438 
17439 /*
17440  * Return TRUE if "p" starts with "<SID>" or "s:".
17441  * Only works if eval_fname_script() returned non-zero for "p"!
17442  */
17443     static int
17444 eval_fname_sid(p)
17445     char_u	*p;
17446 {
17447     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17448 }
17449 
17450 /*
17451  * List the head of the function: "name(arg1, arg2)".
17452  */
17453     static void
17454 list_func_head(fp, indent)
17455     ufunc_T	*fp;
17456     int		indent;
17457 {
17458     int		j;
17459 
17460     msg_start();
17461     if (indent)
17462 	MSG_PUTS("   ");
17463     MSG_PUTS("function ");
17464     if (fp->uf_name[0] == K_SPECIAL)
17465     {
17466 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17467 	msg_puts(fp->uf_name + 3);
17468     }
17469     else
17470 	msg_puts(fp->uf_name);
17471     msg_putchar('(');
17472     for (j = 0; j < fp->uf_args.ga_len; ++j)
17473     {
17474 	if (j)
17475 	    MSG_PUTS(", ");
17476 	msg_puts(FUNCARG(fp, j));
17477     }
17478     if (fp->uf_varargs)
17479     {
17480 	if (j)
17481 	    MSG_PUTS(", ");
17482 	MSG_PUTS("...");
17483     }
17484     msg_putchar(')');
17485 }
17486 
17487 /*
17488  * Find a function by name, return pointer to it in ufuncs.
17489  * Return NULL for unknown function.
17490  */
17491     static ufunc_T *
17492 find_func(name)
17493     char_u	*name;
17494 {
17495     hashitem_T	*hi;
17496 
17497     hi = hash_find(&func_hashtab, name);
17498     if (!HASHITEM_EMPTY(hi))
17499 	return HI2UF(hi);
17500     return NULL;
17501 }
17502 
17503 #if defined(EXITFREE) || defined(PROTO)
17504     void
17505 free_all_functions()
17506 {
17507     hashitem_T	*hi;
17508 
17509     /* Need to start all over every time, because func_free() may change the
17510      * hash table. */
17511     while (func_hashtab.ht_used > 0)
17512 	for (hi = func_hashtab.ht_array; ; ++hi)
17513 	    if (!HASHITEM_EMPTY(hi))
17514 	    {
17515 		func_free(HI2UF(hi));
17516 		break;
17517 	    }
17518 }
17519 #endif
17520 
17521 /*
17522  * Return TRUE if a function "name" exists.
17523  */
17524     static int
17525 function_exists(name)
17526     char_u *name;
17527 {
17528     char_u  *p = name;
17529     int	    n = FALSE;
17530 
17531     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17532     if (p != NULL)
17533     {
17534 	if (builtin_function(p))
17535 	    n = (find_internal_func(p) >= 0);
17536 	else
17537 	    n = (find_func(p) != NULL);
17538 	vim_free(p);
17539     }
17540     return n;
17541 }
17542 
17543 /*
17544  * Return TRUE if "name" looks like a builtin function name: starts with a
17545  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17546  */
17547     static int
17548 builtin_function(name)
17549     char_u *name;
17550 {
17551     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17552 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17553 }
17554 
17555 #if defined(FEAT_PROFILE) || defined(PROTO)
17556 /*
17557  * Start profiling function "fp".
17558  */
17559     static void
17560 func_do_profile(fp)
17561     ufunc_T	*fp;
17562 {
17563     fp->uf_tm_count = 0;
17564     profile_zero(&fp->uf_tm_self);
17565     profile_zero(&fp->uf_tm_total);
17566     if (fp->uf_tml_count == NULL)
17567 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17568 					 (sizeof(int) * fp->uf_lines.ga_len));
17569     if (fp->uf_tml_total == NULL)
17570 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17571 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17572     if (fp->uf_tml_self == NULL)
17573 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17574 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17575     fp->uf_tml_idx = -1;
17576     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17577 						   || fp->uf_tml_self == NULL)
17578 	return;	    /* out of memory */
17579 
17580     fp->uf_profiling = TRUE;
17581 }
17582 
17583 /*
17584  * Dump the profiling results for all functions in file "fd".
17585  */
17586     void
17587 func_dump_profile(fd)
17588     FILE    *fd;
17589 {
17590     hashitem_T	*hi;
17591     int		todo;
17592     ufunc_T	*fp;
17593     int		i;
17594     ufunc_T	**sorttab;
17595     int		st_len = 0;
17596 
17597     todo = func_hashtab.ht_used;
17598     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17599 
17600     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17601     {
17602 	if (!HASHITEM_EMPTY(hi))
17603 	{
17604 	    --todo;
17605 	    fp = HI2UF(hi);
17606 	    if (fp->uf_profiling)
17607 	    {
17608 		if (sorttab != NULL)
17609 		    sorttab[st_len++] = fp;
17610 
17611 		if (fp->uf_name[0] == K_SPECIAL)
17612 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17613 		else
17614 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17615 		if (fp->uf_tm_count == 1)
17616 		    fprintf(fd, "Called 1 time\n");
17617 		else
17618 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17619 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17620 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17621 		fprintf(fd, "\n");
17622 		fprintf(fd, "count  total (s)   self (s)\n");
17623 
17624 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17625 		{
17626 		    prof_func_line(fd, fp->uf_tml_count[i],
17627 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17628 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17629 		}
17630 		fprintf(fd, "\n");
17631 	    }
17632 	}
17633     }
17634 
17635     if (sorttab != NULL && st_len > 0)
17636     {
17637 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17638 							      prof_total_cmp);
17639 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17640 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17641 							      prof_self_cmp);
17642 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17643     }
17644 }
17645 
17646     static void
17647 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17648     FILE	*fd;
17649     ufunc_T	**sorttab;
17650     int		st_len;
17651     char	*title;
17652     int		prefer_self;	/* when equal print only self time */
17653 {
17654     int		i;
17655     ufunc_T	*fp;
17656 
17657     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17658     fprintf(fd, "count  total (s)   self (s)  function\n");
17659     for (i = 0; i < 20 && i < st_len; ++i)
17660     {
17661 	fp = sorttab[i];
17662 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17663 								 prefer_self);
17664 	if (fp->uf_name[0] == K_SPECIAL)
17665 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17666 	else
17667 	    fprintf(fd, " %s()\n", fp->uf_name);
17668     }
17669     fprintf(fd, "\n");
17670 }
17671 
17672 /*
17673  * Print the count and times for one function or function line.
17674  */
17675     static void
17676 prof_func_line(fd, count, total, self, prefer_self)
17677     FILE	*fd;
17678     int		count;
17679     proftime_T	*total;
17680     proftime_T	*self;
17681     int		prefer_self;	/* when equal print only self time */
17682 {
17683     if (count > 0)
17684     {
17685 	fprintf(fd, "%5d ", count);
17686 	if (prefer_self && profile_equal(total, self))
17687 	    fprintf(fd, "           ");
17688 	else
17689 	    fprintf(fd, "%s ", profile_msg(total));
17690 	if (!prefer_self && profile_equal(total, self))
17691 	    fprintf(fd, "           ");
17692 	else
17693 	    fprintf(fd, "%s ", profile_msg(self));
17694     }
17695     else
17696 	fprintf(fd, "                            ");
17697 }
17698 
17699 /*
17700  * Compare function for total time sorting.
17701  */
17702     static int
17703 #ifdef __BORLANDC__
17704 _RTLENTRYF
17705 #endif
17706 prof_total_cmp(s1, s2)
17707     const void	*s1;
17708     const void	*s2;
17709 {
17710     ufunc_T	*p1, *p2;
17711 
17712     p1 = *(ufunc_T **)s1;
17713     p2 = *(ufunc_T **)s2;
17714     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17715 }
17716 
17717 /*
17718  * Compare function for self time sorting.
17719  */
17720     static int
17721 #ifdef __BORLANDC__
17722 _RTLENTRYF
17723 #endif
17724 prof_self_cmp(s1, s2)
17725     const void	*s1;
17726     const void	*s2;
17727 {
17728     ufunc_T	*p1, *p2;
17729 
17730     p1 = *(ufunc_T **)s1;
17731     p2 = *(ufunc_T **)s2;
17732     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17733 }
17734 
17735 #endif
17736 
17737 /* The names of packages that once were loaded is remembered. */
17738 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17739 
17740 /*
17741  * If "name" has a package name try autoloading the script for it.
17742  * Return TRUE if a package was loaded.
17743  */
17744     static int
17745 script_autoload(name, reload)
17746     char_u	*name;
17747     int		reload;	    /* load script again when already loaded */
17748 {
17749     char_u	*p;
17750     char_u	*scriptname, *tofree;
17751     int		ret = FALSE;
17752     int		i;
17753 
17754     /* If there is no '#' after name[0] there is no package name. */
17755     p = vim_strchr(name, AUTOLOAD_CHAR);
17756     if (p == NULL || p == name)
17757 	return FALSE;
17758 
17759     tofree = scriptname = autoload_name(name);
17760 
17761     /* Find the name in the list of previously loaded package names.  Skip
17762      * "autoload/", it's always the same. */
17763     for (i = 0; i < ga_loaded.ga_len; ++i)
17764 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
17765 	    break;
17766     if (!reload && i < ga_loaded.ga_len)
17767 	ret = FALSE;	    /* was loaded already */
17768     else
17769     {
17770 	/* Remember the name if it wasn't loaded already. */
17771 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
17772 	{
17773 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
17774 	    tofree = NULL;
17775 	}
17776 
17777 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
17778 	if (cmd_runtime(scriptname, FALSE) == OK)
17779 	    ret = TRUE;
17780     }
17781 
17782     vim_free(tofree);
17783     return ret;
17784 }
17785 
17786 /*
17787  * Return the autoload script name for a function or variable name.
17788  * Returns NULL when out of memory.
17789  */
17790     static char_u *
17791 autoload_name(name)
17792     char_u	*name;
17793 {
17794     char_u	*p;
17795     char_u	*scriptname;
17796 
17797     /* Get the script file name: replace '#' with '/', append ".vim". */
17798     scriptname = alloc((unsigned)(STRLEN(name) + 14));
17799     if (scriptname == NULL)
17800 	return FALSE;
17801     STRCPY(scriptname, "autoload/");
17802     STRCAT(scriptname, name);
17803     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
17804     STRCAT(scriptname, ".vim");
17805     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
17806 	*p = '/';
17807     return scriptname;
17808 }
17809 
17810 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
17811 
17812 /*
17813  * Function given to ExpandGeneric() to obtain the list of user defined
17814  * function names.
17815  */
17816     char_u *
17817 get_user_func_name(xp, idx)
17818     expand_T	*xp;
17819     int		idx;
17820 {
17821     static long_u	done;
17822     static hashitem_T	*hi;
17823     ufunc_T		*fp;
17824 
17825     if (idx == 0)
17826     {
17827 	done = 0;
17828 	hi = func_hashtab.ht_array;
17829     }
17830     if (done < func_hashtab.ht_used)
17831     {
17832 	if (done++ > 0)
17833 	    ++hi;
17834 	while (HASHITEM_EMPTY(hi))
17835 	    ++hi;
17836 	fp = HI2UF(hi);
17837 
17838 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
17839 	    return fp->uf_name;	/* prevents overflow */
17840 
17841 	cat_func_name(IObuff, fp);
17842 	if (xp->xp_context != EXPAND_USER_FUNC)
17843 	{
17844 	    STRCAT(IObuff, "(");
17845 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
17846 		STRCAT(IObuff, ")");
17847 	}
17848 	return IObuff;
17849     }
17850     return NULL;
17851 }
17852 
17853 #endif /* FEAT_CMDL_COMPL */
17854 
17855 /*
17856  * Copy the function name of "fp" to buffer "buf".
17857  * "buf" must be able to hold the function name plus three bytes.
17858  * Takes care of script-local function names.
17859  */
17860     static void
17861 cat_func_name(buf, fp)
17862     char_u	*buf;
17863     ufunc_T	*fp;
17864 {
17865     if (fp->uf_name[0] == K_SPECIAL)
17866     {
17867 	STRCPY(buf, "<SNR>");
17868 	STRCAT(buf, fp->uf_name + 3);
17869     }
17870     else
17871 	STRCPY(buf, fp->uf_name);
17872 }
17873 
17874 /*
17875  * ":delfunction {name}"
17876  */
17877     void
17878 ex_delfunction(eap)
17879     exarg_T	*eap;
17880 {
17881     ufunc_T	*fp = NULL;
17882     char_u	*p;
17883     char_u	*name;
17884     funcdict_T	fudi;
17885 
17886     p = eap->arg;
17887     name = trans_function_name(&p, eap->skip, 0, &fudi);
17888     vim_free(fudi.fd_newkey);
17889     if (name == NULL)
17890     {
17891 	if (fudi.fd_dict != NULL && !eap->skip)
17892 	    EMSG(_(e_funcref));
17893 	return;
17894     }
17895     if (!ends_excmd(*skipwhite(p)))
17896     {
17897 	vim_free(name);
17898 	EMSG(_(e_trailing));
17899 	return;
17900     }
17901     eap->nextcmd = check_nextcmd(p);
17902     if (eap->nextcmd != NULL)
17903 	*p = NUL;
17904 
17905     if (!eap->skip)
17906 	fp = find_func(name);
17907     vim_free(name);
17908 
17909     if (!eap->skip)
17910     {
17911 	if (fp == NULL)
17912 	{
17913 	    EMSG2(_(e_nofunc), eap->arg);
17914 	    return;
17915 	}
17916 	if (fp->uf_calls > 0)
17917 	{
17918 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
17919 	    return;
17920 	}
17921 
17922 	if (fudi.fd_dict != NULL)
17923 	{
17924 	    /* Delete the dict item that refers to the function, it will
17925 	     * invoke func_unref() and possibly delete the function. */
17926 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
17927 	}
17928 	else
17929 	    func_free(fp);
17930     }
17931 }
17932 
17933 /*
17934  * Free a function and remove it from the list of functions.
17935  */
17936     static void
17937 func_free(fp)
17938     ufunc_T *fp;
17939 {
17940     hashitem_T	*hi;
17941 
17942     /* clear this function */
17943     ga_clear_strings(&(fp->uf_args));
17944     ga_clear_strings(&(fp->uf_lines));
17945 #ifdef FEAT_PROFILE
17946     vim_free(fp->uf_tml_count);
17947     vim_free(fp->uf_tml_total);
17948     vim_free(fp->uf_tml_self);
17949 #endif
17950 
17951     /* remove the function from the function hashtable */
17952     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
17953     if (HASHITEM_EMPTY(hi))
17954 	EMSG2(_(e_intern2), "func_free()");
17955     else
17956 	hash_remove(&func_hashtab, hi);
17957 
17958     vim_free(fp);
17959 }
17960 
17961 /*
17962  * Unreference a Function: decrement the reference count and free it when it
17963  * becomes zero.  Only for numbered functions.
17964  */
17965     static void
17966 func_unref(name)
17967     char_u	*name;
17968 {
17969     ufunc_T *fp;
17970 
17971     if (name != NULL && isdigit(*name))
17972     {
17973 	fp = find_func(name);
17974 	if (fp == NULL)
17975 	    EMSG2(_(e_intern2), "func_unref()");
17976 	else if (--fp->uf_refcount <= 0)
17977 	{
17978 	    /* Only delete it when it's not being used.  Otherwise it's done
17979 	     * when "uf_calls" becomes zero. */
17980 	    if (fp->uf_calls == 0)
17981 		func_free(fp);
17982 	}
17983     }
17984 }
17985 
17986 /*
17987  * Count a reference to a Function.
17988  */
17989     static void
17990 func_ref(name)
17991     char_u	*name;
17992 {
17993     ufunc_T *fp;
17994 
17995     if (name != NULL && isdigit(*name))
17996     {
17997 	fp = find_func(name);
17998 	if (fp == NULL)
17999 	    EMSG2(_(e_intern2), "func_ref()");
18000 	else
18001 	    ++fp->uf_refcount;
18002     }
18003 }
18004 
18005 /*
18006  * Call a user function.
18007  */
18008     static void
18009 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
18010     ufunc_T	*fp;		/* pointer to function */
18011     int		argcount;	/* nr of args */
18012     typval_T	*argvars;	/* arguments */
18013     typval_T	*rettv;		/* return value */
18014     linenr_T	firstline;	/* first line of range */
18015     linenr_T	lastline;	/* last line of range */
18016     dict_T	*selfdict;	/* Dictionary for "self" */
18017 {
18018     char_u	*save_sourcing_name;
18019     linenr_T	save_sourcing_lnum;
18020     scid_T	save_current_SID;
18021     funccall_T	fc;
18022     int		save_did_emsg;
18023     static int	depth = 0;
18024     dictitem_T	*v;
18025     int		fixvar_idx = 0;	/* index in fixvar[] */
18026     int		i;
18027     int		ai;
18028     char_u	numbuf[NUMBUFLEN];
18029     char_u	*name;
18030 #ifdef FEAT_PROFILE
18031     proftime_T	wait_start;
18032 #endif
18033 
18034     /* If depth of calling is getting too high, don't execute the function */
18035     if (depth >= p_mfd)
18036     {
18037 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
18038 	rettv->v_type = VAR_NUMBER;
18039 	rettv->vval.v_number = -1;
18040 	return;
18041     }
18042     ++depth;
18043 
18044     line_breakcheck();		/* check for CTRL-C hit */
18045 
18046     fc.caller = current_funccal;
18047     current_funccal = &fc;
18048     fc.func = fp;
18049     fc.rettv = rettv;
18050     rettv->vval.v_number = 0;
18051     fc.linenr = 0;
18052     fc.returned = FALSE;
18053     fc.level = ex_nesting_level;
18054     /* Check if this function has a breakpoint. */
18055     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
18056     fc.dbg_tick = debug_tick;
18057 
18058     /*
18059      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
18060      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
18061      * each argument variable and saves a lot of time.
18062      */
18063     /*
18064      * Init l: variables.
18065      */
18066     init_var_dict(&fc.l_vars, &fc.l_vars_var);
18067     if (selfdict != NULL)
18068     {
18069 	/* Set l:self to "selfdict". */
18070 	v = &fc.fixvar[fixvar_idx++].var;
18071 	STRCPY(v->di_key, "self");
18072 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
18073 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
18074 	v->di_tv.v_type = VAR_DICT;
18075 	v->di_tv.v_lock = 0;
18076 	v->di_tv.vval.v_dict = selfdict;
18077 	++selfdict->dv_refcount;
18078     }
18079 
18080     /*
18081      * Init a: variables.
18082      * Set a:0 to "argcount".
18083      * Set a:000 to a list with room for the "..." arguments.
18084      */
18085     init_var_dict(&fc.l_avars, &fc.l_avars_var);
18086     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
18087 				(varnumber_T)(argcount - fp->uf_args.ga_len));
18088     v = &fc.fixvar[fixvar_idx++].var;
18089     STRCPY(v->di_key, "000");
18090     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18091     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18092     v->di_tv.v_type = VAR_LIST;
18093     v->di_tv.v_lock = VAR_FIXED;
18094     v->di_tv.vval.v_list = &fc.l_varlist;
18095     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
18096     fc.l_varlist.lv_refcount = 99999;
18097 
18098     /*
18099      * Set a:firstline to "firstline" and a:lastline to "lastline".
18100      * Set a:name to named arguments.
18101      * Set a:N to the "..." arguments.
18102      */
18103     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
18104 						      (varnumber_T)firstline);
18105     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
18106 						       (varnumber_T)lastline);
18107     for (i = 0; i < argcount; ++i)
18108     {
18109 	ai = i - fp->uf_args.ga_len;
18110 	if (ai < 0)
18111 	    /* named argument a:name */
18112 	    name = FUNCARG(fp, i);
18113 	else
18114 	{
18115 	    /* "..." argument a:1, a:2, etc. */
18116 	    sprintf((char *)numbuf, "%d", ai + 1);
18117 	    name = numbuf;
18118 	}
18119 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
18120 	{
18121 	    v = &fc.fixvar[fixvar_idx++].var;
18122 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18123 	}
18124 	else
18125 	{
18126 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
18127 							     + STRLEN(name)));
18128 	    if (v == NULL)
18129 		break;
18130 	    v->di_flags = DI_FLAGS_RO;
18131 	}
18132 	STRCPY(v->di_key, name);
18133 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18134 
18135 	/* Note: the values are copied directly to avoid alloc/free.
18136 	 * "argvars" must have VAR_FIXED for v_lock. */
18137 	v->di_tv = argvars[i];
18138 	v->di_tv.v_lock = VAR_FIXED;
18139 
18140 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
18141 	{
18142 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18143 	    fc.l_listitems[ai].li_tv = argvars[i];
18144 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18145 	}
18146     }
18147 
18148     /* Don't redraw while executing the function. */
18149     ++RedrawingDisabled;
18150     save_sourcing_name = sourcing_name;
18151     save_sourcing_lnum = sourcing_lnum;
18152     sourcing_lnum = 1;
18153     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18154 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18155     if (sourcing_name != NULL)
18156     {
18157 	if (save_sourcing_name != NULL
18158 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18159 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18160 	else
18161 	    STRCPY(sourcing_name, "function ");
18162 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18163 
18164 	if (p_verbose >= 12)
18165 	{
18166 	    ++no_wait_return;
18167 	    verbose_enter_scroll();
18168 
18169 	    smsg((char_u *)_("calling %s"), sourcing_name);
18170 	    if (p_verbose >= 14)
18171 	    {
18172 		char_u	buf[MSG_BUF_LEN];
18173 		char_u	numbuf[NUMBUFLEN];
18174 		char_u	*tofree;
18175 
18176 		msg_puts((char_u *)"(");
18177 		for (i = 0; i < argcount; ++i)
18178 		{
18179 		    if (i > 0)
18180 			msg_puts((char_u *)", ");
18181 		    if (argvars[i].v_type == VAR_NUMBER)
18182 			msg_outnum((long)argvars[i].vval.v_number);
18183 		    else
18184 		    {
18185 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18186 							    buf, MSG_BUF_CLEN);
18187 			msg_puts(buf);
18188 			vim_free(tofree);
18189 		    }
18190 		}
18191 		msg_puts((char_u *)")");
18192 	    }
18193 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18194 
18195 	    verbose_leave_scroll();
18196 	    --no_wait_return;
18197 	}
18198     }
18199 #ifdef FEAT_PROFILE
18200     if (do_profiling)
18201     {
18202 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18203 	    func_do_profile(fp);
18204 	if (fp->uf_profiling
18205 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18206 	{
18207 	    ++fp->uf_tm_count;
18208 	    profile_start(&fp->uf_tm_start);
18209 	    profile_zero(&fp->uf_tm_children);
18210 	}
18211 	script_prof_save(&wait_start);
18212     }
18213 #endif
18214 
18215     save_current_SID = current_SID;
18216     current_SID = fp->uf_script_ID;
18217     save_did_emsg = did_emsg;
18218     did_emsg = FALSE;
18219 
18220     /* call do_cmdline() to execute the lines */
18221     do_cmdline(NULL, get_func_line, (void *)&fc,
18222 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18223 
18224     --RedrawingDisabled;
18225 
18226     /* when the function was aborted because of an error, return -1 */
18227     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18228     {
18229 	clear_tv(rettv);
18230 	rettv->v_type = VAR_NUMBER;
18231 	rettv->vval.v_number = -1;
18232     }
18233 
18234 #ifdef FEAT_PROFILE
18235     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18236     {
18237 	profile_end(&fp->uf_tm_start);
18238 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18239 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18240 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18241 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18242 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18243 	{
18244 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18245 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18246 	}
18247     }
18248 #endif
18249 
18250     /* when being verbose, mention the return value */
18251     if (p_verbose >= 12)
18252     {
18253 	++no_wait_return;
18254 	verbose_enter_scroll();
18255 
18256 	if (aborting())
18257 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18258 	else if (fc.rettv->v_type == VAR_NUMBER)
18259 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18260 					       (long)fc.rettv->vval.v_number);
18261 	else
18262 	{
18263 	    char_u	buf[MSG_BUF_LEN];
18264 	    char_u	numbuf[NUMBUFLEN];
18265 	    char_u	*tofree;
18266 
18267 	    /* The value may be very long.  Skip the middle part, so that we
18268 	     * have some idea how it starts and ends. smsg() would always
18269 	     * truncate it at the end. */
18270 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18271 							   buf, MSG_BUF_CLEN);
18272 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18273 	    vim_free(tofree);
18274 	}
18275 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18276 
18277 	verbose_leave_scroll();
18278 	--no_wait_return;
18279     }
18280 
18281     vim_free(sourcing_name);
18282     sourcing_name = save_sourcing_name;
18283     sourcing_lnum = save_sourcing_lnum;
18284     current_SID = save_current_SID;
18285 #ifdef FEAT_PROFILE
18286     if (do_profiling)
18287 	script_prof_restore(&wait_start);
18288 #endif
18289 
18290     if (p_verbose >= 12 && sourcing_name != NULL)
18291     {
18292 	++no_wait_return;
18293 	verbose_enter_scroll();
18294 
18295 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18296 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18297 
18298 	verbose_leave_scroll();
18299 	--no_wait_return;
18300     }
18301 
18302     did_emsg |= save_did_emsg;
18303     current_funccal = fc.caller;
18304 
18305     /* The a: variables typevals were not alloced, only free the allocated
18306      * variables. */
18307     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18308 
18309     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18310     --depth;
18311 }
18312 
18313 /*
18314  * Add a number variable "name" to dict "dp" with value "nr".
18315  */
18316     static void
18317 add_nr_var(dp, v, name, nr)
18318     dict_T	*dp;
18319     dictitem_T	*v;
18320     char	*name;
18321     varnumber_T nr;
18322 {
18323     STRCPY(v->di_key, name);
18324     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18325     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18326     v->di_tv.v_type = VAR_NUMBER;
18327     v->di_tv.v_lock = VAR_FIXED;
18328     v->di_tv.vval.v_number = nr;
18329 }
18330 
18331 /*
18332  * ":return [expr]"
18333  */
18334     void
18335 ex_return(eap)
18336     exarg_T	*eap;
18337 {
18338     char_u	*arg = eap->arg;
18339     typval_T	rettv;
18340     int		returning = FALSE;
18341 
18342     if (current_funccal == NULL)
18343     {
18344 	EMSG(_("E133: :return not inside a function"));
18345 	return;
18346     }
18347 
18348     if (eap->skip)
18349 	++emsg_skip;
18350 
18351     eap->nextcmd = NULL;
18352     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18353 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18354     {
18355 	if (!eap->skip)
18356 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18357 	else
18358 	    clear_tv(&rettv);
18359     }
18360     /* It's safer to return also on error. */
18361     else if (!eap->skip)
18362     {
18363 	/*
18364 	 * Return unless the expression evaluation has been cancelled due to an
18365 	 * aborting error, an interrupt, or an exception.
18366 	 */
18367 	if (!aborting())
18368 	    returning = do_return(eap, FALSE, TRUE, NULL);
18369     }
18370 
18371     /* When skipping or the return gets pending, advance to the next command
18372      * in this line (!returning).  Otherwise, ignore the rest of the line.
18373      * Following lines will be ignored by get_func_line(). */
18374     if (returning)
18375 	eap->nextcmd = NULL;
18376     else if (eap->nextcmd == NULL)	    /* no argument */
18377 	eap->nextcmd = check_nextcmd(arg);
18378 
18379     if (eap->skip)
18380 	--emsg_skip;
18381 }
18382 
18383 /*
18384  * Return from a function.  Possibly makes the return pending.  Also called
18385  * for a pending return at the ":endtry" or after returning from an extra
18386  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18387  * when called due to a ":return" command.  "rettv" may point to a typval_T
18388  * with the return rettv.  Returns TRUE when the return can be carried out,
18389  * FALSE when the return gets pending.
18390  */
18391     int
18392 do_return(eap, reanimate, is_cmd, rettv)
18393     exarg_T	*eap;
18394     int		reanimate;
18395     int		is_cmd;
18396     void	*rettv;
18397 {
18398     int		idx;
18399     struct condstack *cstack = eap->cstack;
18400 
18401     if (reanimate)
18402 	/* Undo the return. */
18403 	current_funccal->returned = FALSE;
18404 
18405     /*
18406      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18407      * not in its finally clause (which then is to be executed next) is found.
18408      * In this case, make the ":return" pending for execution at the ":endtry".
18409      * Otherwise, return normally.
18410      */
18411     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18412     if (idx >= 0)
18413     {
18414 	cstack->cs_pending[idx] = CSTP_RETURN;
18415 
18416 	if (!is_cmd && !reanimate)
18417 	    /* A pending return again gets pending.  "rettv" points to an
18418 	     * allocated variable with the rettv of the original ":return"'s
18419 	     * argument if present or is NULL else. */
18420 	    cstack->cs_rettv[idx] = rettv;
18421 	else
18422 	{
18423 	    /* When undoing a return in order to make it pending, get the stored
18424 	     * return rettv. */
18425 	    if (reanimate)
18426 		rettv = current_funccal->rettv;
18427 
18428 	    if (rettv != NULL)
18429 	    {
18430 		/* Store the value of the pending return. */
18431 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18432 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18433 		else
18434 		    EMSG(_(e_outofmem));
18435 	    }
18436 	    else
18437 		cstack->cs_rettv[idx] = NULL;
18438 
18439 	    if (reanimate)
18440 	    {
18441 		/* The pending return value could be overwritten by a ":return"
18442 		 * without argument in a finally clause; reset the default
18443 		 * return value. */
18444 		current_funccal->rettv->v_type = VAR_NUMBER;
18445 		current_funccal->rettv->vval.v_number = 0;
18446 	    }
18447 	}
18448 	report_make_pending(CSTP_RETURN, rettv);
18449     }
18450     else
18451     {
18452 	current_funccal->returned = TRUE;
18453 
18454 	/* If the return is carried out now, store the return value.  For
18455 	 * a return immediately after reanimation, the value is already
18456 	 * there. */
18457 	if (!reanimate && rettv != NULL)
18458 	{
18459 	    clear_tv(current_funccal->rettv);
18460 	    *current_funccal->rettv = *(typval_T *)rettv;
18461 	    if (!is_cmd)
18462 		vim_free(rettv);
18463 	}
18464     }
18465 
18466     return idx < 0;
18467 }
18468 
18469 /*
18470  * Free the variable with a pending return value.
18471  */
18472     void
18473 discard_pending_return(rettv)
18474     void	*rettv;
18475 {
18476     free_tv((typval_T *)rettv);
18477 }
18478 
18479 /*
18480  * Generate a return command for producing the value of "rettv".  The result
18481  * is an allocated string.  Used by report_pending() for verbose messages.
18482  */
18483     char_u *
18484 get_return_cmd(rettv)
18485     void	*rettv;
18486 {
18487     char_u	*s = NULL;
18488     char_u	*tofree = NULL;
18489     char_u	numbuf[NUMBUFLEN];
18490 
18491     if (rettv != NULL)
18492 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18493     if (s == NULL)
18494 	s = (char_u *)"";
18495 
18496     STRCPY(IObuff, ":return ");
18497     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18498     if (STRLEN(s) + 8 >= IOSIZE)
18499 	STRCPY(IObuff + IOSIZE - 4, "...");
18500     vim_free(tofree);
18501     return vim_strsave(IObuff);
18502 }
18503 
18504 /*
18505  * Get next function line.
18506  * Called by do_cmdline() to get the next line.
18507  * Returns allocated string, or NULL for end of function.
18508  */
18509 /* ARGSUSED */
18510     char_u *
18511 get_func_line(c, cookie, indent)
18512     int	    c;		    /* not used */
18513     void    *cookie;
18514     int	    indent;	    /* not used */
18515 {
18516     funccall_T	*fcp = (funccall_T *)cookie;
18517     ufunc_T	*fp = fcp->func;
18518     char_u	*retval;
18519     garray_T	*gap;  /* growarray with function lines */
18520 
18521     /* If breakpoints have been added/deleted need to check for it. */
18522     if (fcp->dbg_tick != debug_tick)
18523     {
18524 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18525 							       sourcing_lnum);
18526 	fcp->dbg_tick = debug_tick;
18527     }
18528 #ifdef FEAT_PROFILE
18529     if (do_profiling)
18530 	func_line_end(cookie);
18531 #endif
18532 
18533     gap = &fp->uf_lines;
18534     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18535 	retval = NULL;
18536     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18537 	retval = NULL;
18538     else
18539     {
18540 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18541 	sourcing_lnum = fcp->linenr;
18542 #ifdef FEAT_PROFILE
18543 	if (do_profiling)
18544 	    func_line_start(cookie);
18545 #endif
18546     }
18547 
18548     /* Did we encounter a breakpoint? */
18549     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18550     {
18551 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18552 	/* Find next breakpoint. */
18553 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18554 							       sourcing_lnum);
18555 	fcp->dbg_tick = debug_tick;
18556     }
18557 
18558     return retval;
18559 }
18560 
18561 #if defined(FEAT_PROFILE) || defined(PROTO)
18562 /*
18563  * Called when starting to read a function line.
18564  * "sourcing_lnum" must be correct!
18565  * When skipping lines it may not actually be executed, but we won't find out
18566  * until later and we need to store the time now.
18567  */
18568     void
18569 func_line_start(cookie)
18570     void    *cookie;
18571 {
18572     funccall_T	*fcp = (funccall_T *)cookie;
18573     ufunc_T	*fp = fcp->func;
18574 
18575     if (fp->uf_profiling && sourcing_lnum >= 1
18576 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18577     {
18578 	fp->uf_tml_idx = sourcing_lnum - 1;
18579 	fp->uf_tml_execed = FALSE;
18580 	profile_start(&fp->uf_tml_start);
18581 	profile_zero(&fp->uf_tml_children);
18582 	profile_get_wait(&fp->uf_tml_wait);
18583     }
18584 }
18585 
18586 /*
18587  * Called when actually executing a function line.
18588  */
18589     void
18590 func_line_exec(cookie)
18591     void    *cookie;
18592 {
18593     funccall_T	*fcp = (funccall_T *)cookie;
18594     ufunc_T	*fp = fcp->func;
18595 
18596     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18597 	fp->uf_tml_execed = TRUE;
18598 }
18599 
18600 /*
18601  * Called when done with a function line.
18602  */
18603     void
18604 func_line_end(cookie)
18605     void    *cookie;
18606 {
18607     funccall_T	*fcp = (funccall_T *)cookie;
18608     ufunc_T	*fp = fcp->func;
18609 
18610     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18611     {
18612 	if (fp->uf_tml_execed)
18613 	{
18614 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18615 	    profile_end(&fp->uf_tml_start);
18616 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18617 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18618 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18619 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18620 	}
18621 	fp->uf_tml_idx = -1;
18622     }
18623 }
18624 #endif
18625 
18626 /*
18627  * Return TRUE if the currently active function should be ended, because a
18628  * return was encountered or an error occured.  Used inside a ":while".
18629  */
18630     int
18631 func_has_ended(cookie)
18632     void    *cookie;
18633 {
18634     funccall_T  *fcp = (funccall_T *)cookie;
18635 
18636     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18637      * an error inside a try conditional. */
18638     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18639 	    || fcp->returned);
18640 }
18641 
18642 /*
18643  * return TRUE if cookie indicates a function which "abort"s on errors.
18644  */
18645     int
18646 func_has_abort(cookie)
18647     void    *cookie;
18648 {
18649     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18650 }
18651 
18652 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18653 typedef enum
18654 {
18655     VAR_FLAVOUR_DEFAULT,
18656     VAR_FLAVOUR_SESSION,
18657     VAR_FLAVOUR_VIMINFO
18658 } var_flavour_T;
18659 
18660 static var_flavour_T var_flavour __ARGS((char_u *varname));
18661 
18662     static var_flavour_T
18663 var_flavour(varname)
18664     char_u *varname;
18665 {
18666     char_u *p = varname;
18667 
18668     if (ASCII_ISUPPER(*p))
18669     {
18670 	while (*(++p))
18671 	    if (ASCII_ISLOWER(*p))
18672 		return VAR_FLAVOUR_SESSION;
18673 	return VAR_FLAVOUR_VIMINFO;
18674     }
18675     else
18676 	return VAR_FLAVOUR_DEFAULT;
18677 }
18678 #endif
18679 
18680 #if defined(FEAT_VIMINFO) || defined(PROTO)
18681 /*
18682  * Restore global vars that start with a capital from the viminfo file
18683  */
18684     int
18685 read_viminfo_varlist(virp, writing)
18686     vir_T	*virp;
18687     int		writing;
18688 {
18689     char_u	*tab;
18690     int		is_string = FALSE;
18691     typval_T	tv;
18692 
18693     if (!writing && (find_viminfo_parameter('!') != NULL))
18694     {
18695 	tab = vim_strchr(virp->vir_line + 1, '\t');
18696 	if (tab != NULL)
18697 	{
18698 	    *tab++ = '\0';	/* isolate the variable name */
18699 	    if (*tab == 'S')	/* string var */
18700 		is_string = TRUE;
18701 
18702 	    tab = vim_strchr(tab, '\t');
18703 	    if (tab != NULL)
18704 	    {
18705 		if (is_string)
18706 		{
18707 		    tv.v_type = VAR_STRING;
18708 		    tv.vval.v_string = viminfo_readstring(virp,
18709 				       (int)(tab - virp->vir_line + 1), TRUE);
18710 		}
18711 		else
18712 		{
18713 		    tv.v_type = VAR_NUMBER;
18714 		    tv.vval.v_number = atol((char *)tab + 1);
18715 		}
18716 		set_var(virp->vir_line + 1, &tv, FALSE);
18717 		if (is_string)
18718 		    vim_free(tv.vval.v_string);
18719 	    }
18720 	}
18721     }
18722 
18723     return viminfo_readline(virp);
18724 }
18725 
18726 /*
18727  * Write global vars that start with a capital to the viminfo file
18728  */
18729     void
18730 write_viminfo_varlist(fp)
18731     FILE    *fp;
18732 {
18733     hashitem_T	*hi;
18734     dictitem_T	*this_var;
18735     int		todo;
18736     char	*s;
18737     char_u	*p;
18738     char_u	*tofree;
18739     char_u	numbuf[NUMBUFLEN];
18740 
18741     if (find_viminfo_parameter('!') == NULL)
18742 	return;
18743 
18744     fprintf(fp, _("\n# global variables:\n"));
18745 
18746     todo = globvarht.ht_used;
18747     for (hi = globvarht.ht_array; todo > 0; ++hi)
18748     {
18749 	if (!HASHITEM_EMPTY(hi))
18750 	{
18751 	    --todo;
18752 	    this_var = HI2DI(hi);
18753 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18754 	    {
18755 		switch (this_var->di_tv.v_type)
18756 		{
18757 		    case VAR_STRING: s = "STR"; break;
18758 		    case VAR_NUMBER: s = "NUM"; break;
18759 		    default: continue;
18760 		}
18761 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
18762 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
18763 		if (p != NULL)
18764 		    viminfo_writestring(fp, p);
18765 		vim_free(tofree);
18766 	    }
18767 	}
18768     }
18769 }
18770 #endif
18771 
18772 #if defined(FEAT_SESSION) || defined(PROTO)
18773     int
18774 store_session_globals(fd)
18775     FILE	*fd;
18776 {
18777     hashitem_T	*hi;
18778     dictitem_T	*this_var;
18779     int		todo;
18780     char_u	*p, *t;
18781 
18782     todo = globvarht.ht_used;
18783     for (hi = globvarht.ht_array; todo > 0; ++hi)
18784     {
18785 	if (!HASHITEM_EMPTY(hi))
18786 	{
18787 	    --todo;
18788 	    this_var = HI2DI(hi);
18789 	    if ((this_var->di_tv.v_type == VAR_NUMBER
18790 			|| this_var->di_tv.v_type == VAR_STRING)
18791 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
18792 	    {
18793 		/* Escape special characters with a backslash.  Turn a LF and
18794 		 * CR into \n and \r. */
18795 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
18796 							(char_u *)"\\\"\n\r");
18797 		if (p == NULL)	    /* out of memory */
18798 		    break;
18799 		for (t = p; *t != NUL; ++t)
18800 		    if (*t == '\n')
18801 			*t = 'n';
18802 		    else if (*t == '\r')
18803 			*t = 'r';
18804 		if ((fprintf(fd, "let %s = %c%s%c",
18805 				this_var->di_key,
18806 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18807 									: ' ',
18808 				p,
18809 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18810 								   : ' ') < 0)
18811 			|| put_eol(fd) == FAIL)
18812 		{
18813 		    vim_free(p);
18814 		    return FAIL;
18815 		}
18816 		vim_free(p);
18817 	    }
18818 	}
18819     }
18820     return OK;
18821 }
18822 #endif
18823 
18824 /*
18825  * Display script name where an item was last set.
18826  * Should only be invoked when 'verbose' is non-zero.
18827  */
18828     void
18829 last_set_msg(scriptID)
18830     scid_T scriptID;
18831 {
18832     if (scriptID != 0)
18833     {
18834 	verbose_enter();
18835 	MSG_PUTS(_("\n\tLast set from "));
18836 	MSG_PUTS(get_scriptname(scriptID));
18837 	verbose_leave();
18838     }
18839 }
18840 
18841 #endif /* FEAT_EVAL */
18842 
18843 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
18844 
18845 
18846 #ifdef WIN3264
18847 /*
18848  * Functions for ":8" filename modifier: get 8.3 version of a filename.
18849  */
18850 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18851 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
18852 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18853 
18854 /*
18855  * Get the short pathname of a file.
18856  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
18857  */
18858     static int
18859 get_short_pathname(fnamep, bufp, fnamelen)
18860     char_u	**fnamep;
18861     char_u	**bufp;
18862     int		*fnamelen;
18863 {
18864     int		l,len;
18865     char_u	*newbuf;
18866 
18867     len = *fnamelen;
18868 
18869     l = GetShortPathName(*fnamep, *fnamep, len);
18870     if (l > len - 1)
18871     {
18872 	/* If that doesn't work (not enough space), then save the string
18873 	 * and try again with a new buffer big enough
18874 	 */
18875 	newbuf = vim_strnsave(*fnamep, l);
18876 	if (newbuf == NULL)
18877 	    return 0;
18878 
18879 	vim_free(*bufp);
18880 	*fnamep = *bufp = newbuf;
18881 
18882 	l = GetShortPathName(*fnamep,*fnamep,l+1);
18883 
18884 	/* Really should always succeed, as the buffer is big enough */
18885     }
18886 
18887     *fnamelen = l;
18888     return 1;
18889 }
18890 
18891 /*
18892  * Create a short path name.  Returns the length of the buffer it needs.
18893  * Doesn't copy over the end of the buffer passed in.
18894  */
18895     static int
18896 shortpath_for_invalid_fname(fname, bufp, fnamelen)
18897     char_u	**fname;
18898     char_u	**bufp;
18899     int		*fnamelen;
18900 {
18901     char_u	*s, *p, *pbuf2, *pbuf3;
18902     char_u	ch;
18903     int		len, len2, plen, slen;
18904 
18905     /* Make a copy */
18906     len2 = *fnamelen;
18907     pbuf2 = vim_strnsave(*fname, len2);
18908     pbuf3 = NULL;
18909 
18910     s = pbuf2 + len2 - 1; /* Find the end */
18911     slen = 1;
18912     plen = len2;
18913 
18914     if (after_pathsep(pbuf2, s + 1))
18915     {
18916 	--s;
18917 	++slen;
18918 	--plen;
18919     }
18920 
18921     do
18922     {
18923 	/* Go back one path-seperator */
18924 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
18925 	{
18926 	    --s;
18927 	    ++slen;
18928 	    --plen;
18929 	}
18930 	if (s <= pbuf2)
18931 	    break;
18932 
18933 	/* Remeber the character that is about to be blatted */
18934 	ch = *s;
18935 	*s = 0; /* get_short_pathname requires a null-terminated string */
18936 
18937 	/* Try it in situ */
18938 	p = pbuf2;
18939 	if (!get_short_pathname(&p, &pbuf3, &plen))
18940 	{
18941 	    vim_free(pbuf2);
18942 	    return -1;
18943 	}
18944 	*s = ch;    /* Preserve the string */
18945     } while (plen == 0);
18946 
18947     if (plen > 0)
18948     {
18949 	/* Remeber the length of the new string.  */
18950 	*fnamelen = len = plen + slen;
18951 	vim_free(*bufp);
18952 	if (len > len2)
18953 	{
18954 	    /* If there's not enough space in the currently allocated string,
18955 	     * then copy it to a buffer big enough.
18956 	     */
18957 	    *fname= *bufp = vim_strnsave(p, len);
18958 	    if (*fname == NULL)
18959 		return -1;
18960 	}
18961 	else
18962 	{
18963 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
18964 	    *fname = *bufp = pbuf2;
18965 	    if (p != pbuf2)
18966 		strncpy(*fname, p, plen);
18967 	    pbuf2 = NULL;
18968 	}
18969 	/* Concat the next bit */
18970 	strncpy(*fname + plen, s, slen);
18971 	(*fname)[len] = '\0';
18972     }
18973     vim_free(pbuf3);
18974     vim_free(pbuf2);
18975     return 0;
18976 }
18977 
18978 /*
18979  * Get a pathname for a partial path.
18980  */
18981     static int
18982 shortpath_for_partial(fnamep, bufp, fnamelen)
18983     char_u	**fnamep;
18984     char_u	**bufp;
18985     int		*fnamelen;
18986 {
18987     int		sepcount, len, tflen;
18988     char_u	*p;
18989     char_u	*pbuf, *tfname;
18990     int		hasTilde;
18991 
18992     /* Count up the path seperators from the RHS.. so we know which part
18993      * of the path to return.
18994      */
18995     sepcount = 0;
18996     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
18997 	if (vim_ispathsep(*p))
18998 	    ++sepcount;
18999 
19000     /* Need full path first (use expand_env() to remove a "~/") */
19001     hasTilde = (**fnamep == '~');
19002     if (hasTilde)
19003 	pbuf = tfname = expand_env_save(*fnamep);
19004     else
19005 	pbuf = tfname = FullName_save(*fnamep, FALSE);
19006 
19007     len = tflen = STRLEN(tfname);
19008 
19009     if (!get_short_pathname(&tfname, &pbuf, &len))
19010 	return -1;
19011 
19012     if (len == 0)
19013     {
19014 	/* Don't have a valid filename, so shorten the rest of the
19015 	 * path if we can. This CAN give us invalid 8.3 filenames, but
19016 	 * there's not a lot of point in guessing what it might be.
19017 	 */
19018 	len = tflen;
19019 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
19020 	    return -1;
19021     }
19022 
19023     /* Count the paths backward to find the beginning of the desired string. */
19024     for (p = tfname + len - 1; p >= tfname; --p)
19025     {
19026 #ifdef FEAT_MBYTE
19027 	if (has_mbyte)
19028 	    p -= mb_head_off(tfname, p);
19029 #endif
19030 	if (vim_ispathsep(*p))
19031 	{
19032 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
19033 		break;
19034 	    else
19035 		sepcount --;
19036 	}
19037     }
19038     if (hasTilde)
19039     {
19040 	--p;
19041 	if (p >= tfname)
19042 	    *p = '~';
19043 	else
19044 	    return -1;
19045     }
19046     else
19047 	++p;
19048 
19049     /* Copy in the string - p indexes into tfname - allocated at pbuf */
19050     vim_free(*bufp);
19051     *fnamelen = (int)STRLEN(p);
19052     *bufp = pbuf;
19053     *fnamep = p;
19054 
19055     return 0;
19056 }
19057 #endif /* WIN3264 */
19058 
19059 /*
19060  * Adjust a filename, according to a string of modifiers.
19061  * *fnamep must be NUL terminated when called.  When returning, the length is
19062  * determined by *fnamelen.
19063  * Returns valid flags.
19064  * When there is an error, *fnamep is set to NULL.
19065  */
19066     int
19067 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
19068     char_u	*src;		/* string with modifiers */
19069     int		*usedlen;	/* characters after src that are used */
19070     char_u	**fnamep;	/* file name so far */
19071     char_u	**bufp;		/* buffer for allocated file name or NULL */
19072     int		*fnamelen;	/* length of fnamep */
19073 {
19074     int		valid = 0;
19075     char_u	*tail;
19076     char_u	*s, *p, *pbuf;
19077     char_u	dirname[MAXPATHL];
19078     int		c;
19079     int		has_fullname = 0;
19080 #ifdef WIN3264
19081     int		has_shortname = 0;
19082 #endif
19083 
19084 repeat:
19085     /* ":p" - full path/file_name */
19086     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
19087     {
19088 	has_fullname = 1;
19089 
19090 	valid |= VALID_PATH;
19091 	*usedlen += 2;
19092 
19093 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
19094 	if ((*fnamep)[0] == '~'
19095 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
19096 		&& ((*fnamep)[1] == '/'
19097 # ifdef BACKSLASH_IN_FILENAME
19098 		    || (*fnamep)[1] == '\\'
19099 # endif
19100 		    || (*fnamep)[1] == NUL)
19101 
19102 #endif
19103 	   )
19104 	{
19105 	    *fnamep = expand_env_save(*fnamep);
19106 	    vim_free(*bufp);	/* free any allocated file name */
19107 	    *bufp = *fnamep;
19108 	    if (*fnamep == NULL)
19109 		return -1;
19110 	}
19111 
19112 	/* When "/." or "/.." is used: force expansion to get rid of it. */
19113 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
19114 	{
19115 	    if (vim_ispathsep(*p)
19116 		    && p[1] == '.'
19117 		    && (p[2] == NUL
19118 			|| vim_ispathsep(p[2])
19119 			|| (p[2] == '.'
19120 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
19121 		break;
19122 	}
19123 
19124 	/* FullName_save() is slow, don't use it when not needed. */
19125 	if (*p != NUL || !vim_isAbsName(*fnamep))
19126 	{
19127 	    *fnamep = FullName_save(*fnamep, *p != NUL);
19128 	    vim_free(*bufp);	/* free any allocated file name */
19129 	    *bufp = *fnamep;
19130 	    if (*fnamep == NULL)
19131 		return -1;
19132 	}
19133 
19134 	/* Append a path separator to a directory. */
19135 	if (mch_isdir(*fnamep))
19136 	{
19137 	    /* Make room for one or two extra characters. */
19138 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
19139 	    vim_free(*bufp);	/* free any allocated file name */
19140 	    *bufp = *fnamep;
19141 	    if (*fnamep == NULL)
19142 		return -1;
19143 	    add_pathsep(*fnamep);
19144 	}
19145     }
19146 
19147     /* ":." - path relative to the current directory */
19148     /* ":~" - path relative to the home directory */
19149     /* ":8" - shortname path - postponed till after */
19150     while (src[*usedlen] == ':'
19151 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
19152     {
19153 	*usedlen += 2;
19154 	if (c == '8')
19155 	{
19156 #ifdef WIN3264
19157 	    has_shortname = 1; /* Postpone this. */
19158 #endif
19159 	    continue;
19160 	}
19161 	pbuf = NULL;
19162 	/* Need full path first (use expand_env() to remove a "~/") */
19163 	if (!has_fullname)
19164 	{
19165 	    if (c == '.' && **fnamep == '~')
19166 		p = pbuf = expand_env_save(*fnamep);
19167 	    else
19168 		p = pbuf = FullName_save(*fnamep, FALSE);
19169 	}
19170 	else
19171 	    p = *fnamep;
19172 
19173 	has_fullname = 0;
19174 
19175 	if (p != NULL)
19176 	{
19177 	    if (c == '.')
19178 	    {
19179 		mch_dirname(dirname, MAXPATHL);
19180 		s = shorten_fname(p, dirname);
19181 		if (s != NULL)
19182 		{
19183 		    *fnamep = s;
19184 		    if (pbuf != NULL)
19185 		    {
19186 			vim_free(*bufp);   /* free any allocated file name */
19187 			*bufp = pbuf;
19188 			pbuf = NULL;
19189 		    }
19190 		}
19191 	    }
19192 	    else
19193 	    {
19194 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19195 		/* Only replace it when it starts with '~' */
19196 		if (*dirname == '~')
19197 		{
19198 		    s = vim_strsave(dirname);
19199 		    if (s != NULL)
19200 		    {
19201 			*fnamep = s;
19202 			vim_free(*bufp);
19203 			*bufp = s;
19204 		    }
19205 		}
19206 	    }
19207 	    vim_free(pbuf);
19208 	}
19209     }
19210 
19211     tail = gettail(*fnamep);
19212     *fnamelen = (int)STRLEN(*fnamep);
19213 
19214     /* ":h" - head, remove "/file_name", can be repeated  */
19215     /* Don't remove the first "/" or "c:\" */
19216     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19217     {
19218 	valid |= VALID_HEAD;
19219 	*usedlen += 2;
19220 	s = get_past_head(*fnamep);
19221 	while (tail > s && after_pathsep(s, tail))
19222 	    --tail;
19223 	*fnamelen = (int)(tail - *fnamep);
19224 #ifdef VMS
19225 	if (*fnamelen > 0)
19226 	    *fnamelen += 1; /* the path separator is part of the path */
19227 #endif
19228 	while (tail > s && !after_pathsep(s, tail))
19229 	    mb_ptr_back(*fnamep, tail);
19230     }
19231 
19232     /* ":8" - shortname  */
19233     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19234     {
19235 	*usedlen += 2;
19236 #ifdef WIN3264
19237 	has_shortname = 1;
19238 #endif
19239     }
19240 
19241 #ifdef WIN3264
19242     /* Check shortname after we have done 'heads' and before we do 'tails'
19243      */
19244     if (has_shortname)
19245     {
19246 	pbuf = NULL;
19247 	/* Copy the string if it is shortened by :h */
19248 	if (*fnamelen < (int)STRLEN(*fnamep))
19249 	{
19250 	    p = vim_strnsave(*fnamep, *fnamelen);
19251 	    if (p == 0)
19252 		return -1;
19253 	    vim_free(*bufp);
19254 	    *bufp = *fnamep = p;
19255 	}
19256 
19257 	/* Split into two implementations - makes it easier.  First is where
19258 	 * there isn't a full name already, second is where there is.
19259 	 */
19260 	if (!has_fullname && !vim_isAbsName(*fnamep))
19261 	{
19262 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19263 		return -1;
19264 	}
19265 	else
19266 	{
19267 	    int		l;
19268 
19269 	    /* Simple case, already have the full-name
19270 	     * Nearly always shorter, so try first time. */
19271 	    l = *fnamelen;
19272 	    if (!get_short_pathname(fnamep, bufp, &l))
19273 		return -1;
19274 
19275 	    if (l == 0)
19276 	    {
19277 		/* Couldn't find the filename.. search the paths.
19278 		 */
19279 		l = *fnamelen;
19280 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19281 		    return -1;
19282 	    }
19283 	    *fnamelen = l;
19284 	}
19285     }
19286 #endif /* WIN3264 */
19287 
19288     /* ":t" - tail, just the basename */
19289     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19290     {
19291 	*usedlen += 2;
19292 	*fnamelen -= (int)(tail - *fnamep);
19293 	*fnamep = tail;
19294     }
19295 
19296     /* ":e" - extension, can be repeated */
19297     /* ":r" - root, without extension, can be repeated */
19298     while (src[*usedlen] == ':'
19299 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19300     {
19301 	/* find a '.' in the tail:
19302 	 * - for second :e: before the current fname
19303 	 * - otherwise: The last '.'
19304 	 */
19305 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19306 	    s = *fnamep - 2;
19307 	else
19308 	    s = *fnamep + *fnamelen - 1;
19309 	for ( ; s > tail; --s)
19310 	    if (s[0] == '.')
19311 		break;
19312 	if (src[*usedlen + 1] == 'e')		/* :e */
19313 	{
19314 	    if (s > tail)
19315 	    {
19316 		*fnamelen += (int)(*fnamep - (s + 1));
19317 		*fnamep = s + 1;
19318 #ifdef VMS
19319 		/* cut version from the extension */
19320 		s = *fnamep + *fnamelen - 1;
19321 		for ( ; s > *fnamep; --s)
19322 		    if (s[0] == ';')
19323 			break;
19324 		if (s > *fnamep)
19325 		    *fnamelen = s - *fnamep;
19326 #endif
19327 	    }
19328 	    else if (*fnamep <= tail)
19329 		*fnamelen = 0;
19330 	}
19331 	else				/* :r */
19332 	{
19333 	    if (s > tail)	/* remove one extension */
19334 		*fnamelen = (int)(s - *fnamep);
19335 	}
19336 	*usedlen += 2;
19337     }
19338 
19339     /* ":s?pat?foo?" - substitute */
19340     /* ":gs?pat?foo?" - global substitute */
19341     if (src[*usedlen] == ':'
19342 	    && (src[*usedlen + 1] == 's'
19343 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19344     {
19345 	char_u	    *str;
19346 	char_u	    *pat;
19347 	char_u	    *sub;
19348 	int	    sep;
19349 	char_u	    *flags;
19350 	int	    didit = FALSE;
19351 
19352 	flags = (char_u *)"";
19353 	s = src + *usedlen + 2;
19354 	if (src[*usedlen + 1] == 'g')
19355 	{
19356 	    flags = (char_u *)"g";
19357 	    ++s;
19358 	}
19359 
19360 	sep = *s++;
19361 	if (sep)
19362 	{
19363 	    /* find end of pattern */
19364 	    p = vim_strchr(s, sep);
19365 	    if (p != NULL)
19366 	    {
19367 		pat = vim_strnsave(s, (int)(p - s));
19368 		if (pat != NULL)
19369 		{
19370 		    s = p + 1;
19371 		    /* find end of substitution */
19372 		    p = vim_strchr(s, sep);
19373 		    if (p != NULL)
19374 		    {
19375 			sub = vim_strnsave(s, (int)(p - s));
19376 			str = vim_strnsave(*fnamep, *fnamelen);
19377 			if (sub != NULL && str != NULL)
19378 			{
19379 			    *usedlen = (int)(p + 1 - src);
19380 			    s = do_string_sub(str, pat, sub, flags);
19381 			    if (s != NULL)
19382 			    {
19383 				*fnamep = s;
19384 				*fnamelen = (int)STRLEN(s);
19385 				vim_free(*bufp);
19386 				*bufp = s;
19387 				didit = TRUE;
19388 			    }
19389 			}
19390 			vim_free(sub);
19391 			vim_free(str);
19392 		    }
19393 		    vim_free(pat);
19394 		}
19395 	    }
19396 	    /* after using ":s", repeat all the modifiers */
19397 	    if (didit)
19398 		goto repeat;
19399 	}
19400     }
19401 
19402     return valid;
19403 }
19404 
19405 /*
19406  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19407  * "flags" can be "g" to do a global substitute.
19408  * Returns an allocated string, NULL for error.
19409  */
19410     char_u *
19411 do_string_sub(str, pat, sub, flags)
19412     char_u	*str;
19413     char_u	*pat;
19414     char_u	*sub;
19415     char_u	*flags;
19416 {
19417     int		sublen;
19418     regmatch_T	regmatch;
19419     int		i;
19420     int		do_all;
19421     char_u	*tail;
19422     garray_T	ga;
19423     char_u	*ret;
19424     char_u	*save_cpo;
19425 
19426     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19427     save_cpo = p_cpo;
19428     p_cpo = (char_u *)"";
19429 
19430     ga_init2(&ga, 1, 200);
19431 
19432     do_all = (flags[0] == 'g');
19433 
19434     regmatch.rm_ic = p_ic;
19435     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19436     if (regmatch.regprog != NULL)
19437     {
19438 	tail = str;
19439 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19440 	{
19441 	    /*
19442 	     * Get some space for a temporary buffer to do the substitution
19443 	     * into.  It will contain:
19444 	     * - The text up to where the match is.
19445 	     * - The substituted text.
19446 	     * - The text after the match.
19447 	     */
19448 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19449 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19450 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19451 	    {
19452 		ga_clear(&ga);
19453 		break;
19454 	    }
19455 
19456 	    /* copy the text up to where the match is */
19457 	    i = (int)(regmatch.startp[0] - tail);
19458 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19459 	    /* add the substituted text */
19460 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19461 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19462 	    ga.ga_len += i + sublen - 1;
19463 	    /* avoid getting stuck on a match with an empty string */
19464 	    if (tail == regmatch.endp[0])
19465 	    {
19466 		if (*tail == NUL)
19467 		    break;
19468 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19469 		++ga.ga_len;
19470 	    }
19471 	    else
19472 	    {
19473 		tail = regmatch.endp[0];
19474 		if (*tail == NUL)
19475 		    break;
19476 	    }
19477 	    if (!do_all)
19478 		break;
19479 	}
19480 
19481 	if (ga.ga_data != NULL)
19482 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19483 
19484 	vim_free(regmatch.regprog);
19485     }
19486 
19487     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19488     ga_clear(&ga);
19489     p_cpo = save_cpo;
19490 
19491     return ret;
19492 }
19493 
19494 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19495