xref: /vim-8.2.3635/src/eval.c (revision 81f1ecbc) 
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_test __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
629 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
630 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
631 
632 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum));
633 static int get_env_len __ARGS((char_u **arg));
634 static int get_id_len __ARGS((char_u **arg));
635 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
636 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
637 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
638 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
639 				   valid character */
640 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
641 static int eval_isnamec __ARGS((int c));
642 static int eval_isnamec1 __ARGS((int c));
643 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
644 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
645 static typval_T *alloc_tv __ARGS((void));
646 static typval_T *alloc_string_tv __ARGS((char_u *string));
647 static void free_tv __ARGS((typval_T *varp));
648 static void init_tv __ARGS((typval_T *varp));
649 static long get_tv_number __ARGS((typval_T *varp));
650 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
651 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
652 static char_u *get_tv_string __ARGS((typval_T *varp));
653 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
654 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
655 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
656 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
657 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
658 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
659 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
660 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
661 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
662 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
663 static int var_check_ro __ARGS((int flags, char_u *name));
664 static int tv_check_lock __ARGS((int lock, char_u *name));
665 static void copy_tv __ARGS((typval_T *from, typval_T *to));
666 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
667 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
668 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
669 static int eval_fname_script __ARGS((char_u *p));
670 static int eval_fname_sid __ARGS((char_u *p));
671 static void list_func_head __ARGS((ufunc_T *fp, int indent));
672 static ufunc_T *find_func __ARGS((char_u *name));
673 static int function_exists __ARGS((char_u *name));
674 static int builtin_function __ARGS((char_u *name));
675 #ifdef FEAT_PROFILE
676 static void func_do_profile __ARGS((ufunc_T *fp));
677 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
678 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
679 static int
680 # ifdef __BORLANDC__
681     _RTLENTRYF
682 # endif
683 	prof_total_cmp __ARGS((const void *s1, const void *s2));
684 static int
685 # ifdef __BORLANDC__
686     _RTLENTRYF
687 # endif
688 	prof_self_cmp __ARGS((const void *s1, const void *s2));
689 #endif
690 static int script_autoload __ARGS((char_u *name, int reload));
691 static char_u *autoload_name __ARGS((char_u *name));
692 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
693 static void func_free __ARGS((ufunc_T *fp));
694 static void func_unref __ARGS((char_u *name));
695 static void func_ref __ARGS((char_u *name));
696 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));
697 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
698 
699 /* Character used as separated in autoload function/variable names. */
700 #define AUTOLOAD_CHAR '#'
701 
702 /*
703  * Initialize the global and v: variables.
704  */
705     void
706 eval_init()
707 {
708     int		    i;
709     struct vimvar   *p;
710 
711     init_var_dict(&globvardict, &globvars_var);
712     init_var_dict(&vimvardict, &vimvars_var);
713     hash_init(&compat_hashtab);
714     hash_init(&func_hashtab);
715 
716     for (i = 0; i < VV_LEN; ++i)
717     {
718 	p = &vimvars[i];
719 	STRCPY(p->vv_di.di_key, p->vv_name);
720 	if (p->vv_flags & VV_RO)
721 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
722 	else if (p->vv_flags & VV_RO_SBX)
723 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
724 	else
725 	    p->vv_di.di_flags = DI_FLAGS_FIX;
726 
727 	/* add to v: scope dict, unless the value is not always available */
728 	if (p->vv_type != VAR_UNKNOWN)
729 	    hash_add(&vimvarht, p->vv_di.di_key);
730 	if (p->vv_flags & VV_COMPAT)
731 	    /* add to compat scope dict */
732 	    hash_add(&compat_hashtab, p->vv_di.di_key);
733     }
734 }
735 
736 #if defined(EXITFREE) || defined(PROTO)
737     void
738 eval_clear()
739 {
740     int		    i;
741     struct vimvar   *p;
742 
743     for (i = 0; i < VV_LEN; ++i)
744     {
745 	p = &vimvars[i];
746 	if (p->vv_di.di_tv.v_type == VAR_STRING)
747 	{
748 	    vim_free(p->vv_di.di_tv.vval.v_string);
749 	    p->vv_di.di_tv.vval.v_string = NULL;
750 	}
751     }
752     hash_clear(&vimvarht);
753     hash_clear(&compat_hashtab);
754 
755     /* script-local variables */
756     for (i = 1; i <= ga_scripts.ga_len; ++i)
757 	vars_clear(&SCRIPT_VARS(i));
758     ga_clear(&ga_scripts);
759     free_scriptnames();
760 
761     /* global variables */
762     vars_clear(&globvarht);
763 
764     /* functions */
765     free_all_functions();
766     hash_clear(&func_hashtab);
767 
768     /* unreferenced lists and dicts */
769     (void)garbage_collect();
770 }
771 #endif
772 
773 /*
774  * Return the name of the executed function.
775  */
776     char_u *
777 func_name(cookie)
778     void *cookie;
779 {
780     return ((funccall_T *)cookie)->func->uf_name;
781 }
782 
783 /*
784  * Return the address holding the next breakpoint line for a funccall cookie.
785  */
786     linenr_T *
787 func_breakpoint(cookie)
788     void *cookie;
789 {
790     return &((funccall_T *)cookie)->breakpoint;
791 }
792 
793 /*
794  * Return the address holding the debug tick for a funccall cookie.
795  */
796     int *
797 func_dbg_tick(cookie)
798     void *cookie;
799 {
800     return &((funccall_T *)cookie)->dbg_tick;
801 }
802 
803 /*
804  * Return the nesting level for a funccall cookie.
805  */
806     int
807 func_level(cookie)
808     void *cookie;
809 {
810     return ((funccall_T *)cookie)->level;
811 }
812 
813 /* pointer to funccal for currently active function */
814 funccall_T *current_funccal = NULL;
815 
816 /*
817  * Return TRUE when a function was ended by a ":return" command.
818  */
819     int
820 current_func_returned()
821 {
822     return current_funccal->returned;
823 }
824 
825 
826 /*
827  * Set an internal variable to a string value. Creates the variable if it does
828  * not already exist.
829  */
830     void
831 set_internal_string_var(name, value)
832     char_u	*name;
833     char_u	*value;
834 {
835     char_u	*val;
836     typval_T	*tvp;
837 
838     val = vim_strsave(value);
839     if (val != NULL)
840     {
841 	tvp = alloc_string_tv(val);
842 	if (tvp != NULL)
843 	{
844 	    set_var(name, tvp, FALSE);
845 	    free_tv(tvp);
846 	}
847     }
848 }
849 
850 static lval_T	*redir_lval = NULL;
851 static char_u	*redir_endp = NULL;
852 static char_u	*redir_varname = NULL;
853 
854 /*
855  * Start recording command output to a variable
856  * Returns OK if successfully completed the setup.  FAIL otherwise.
857  */
858     int
859 var_redir_start(name, append)
860     char_u	*name;
861     int		append;		/* append to an existing variable */
862 {
863     int		save_emsg;
864     int		err;
865     typval_T	tv;
866 
867     /* Make sure a valid variable name is specified */
868     if (!eval_isnamec1(*name))
869     {
870 	EMSG(_(e_invarg));
871 	return FAIL;
872     }
873 
874     redir_varname = vim_strsave(name);
875     if (redir_varname == NULL)
876 	return FAIL;
877 
878     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
879     if (redir_lval == NULL)
880     {
881 	var_redir_stop();
882 	return FAIL;
883     }
884 
885     /* Parse the variable name (can be a dict or list entry). */
886     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
887 							     FNE_CHECK_START);
888     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
889     {
890 	if (redir_endp != NULL && *redir_endp != NUL)
891 	    /* Trailing characters are present after the variable name */
892 	    EMSG(_(e_trailing));
893 	else
894 	    EMSG(_(e_invarg));
895 	var_redir_stop();
896 	return FAIL;
897     }
898 
899     /* check if we can write to the variable: set it to or append an empty
900      * string */
901     save_emsg = did_emsg;
902     did_emsg = FALSE;
903     tv.v_type = VAR_STRING;
904     tv.vval.v_string = (char_u *)"";
905     if (append)
906 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
907     else
908 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
909     err = did_emsg;
910     did_emsg += save_emsg;
911     if (err)
912     {
913 	var_redir_stop();
914 	return FAIL;
915     }
916     if (redir_lval->ll_newkey != NULL)
917     {
918 	/* Dictionary item was created, don't do it again. */
919 	vim_free(redir_lval->ll_newkey);
920 	redir_lval->ll_newkey = NULL;
921     }
922 
923     return OK;
924 }
925 
926 /*
927  * Append "value[len]" to the variable set by var_redir_start().
928  */
929     void
930 var_redir_str(value, len)
931     char_u	*value;
932     int		len;
933 {
934     char_u	*val;
935     typval_T	tv;
936     int		save_emsg;
937     int		err;
938 
939     if (redir_lval == NULL)
940 	return;
941 
942     if (len == -1)
943 	/* Append the entire string */
944 	val = vim_strsave(value);
945     else
946 	/* Append only the specified number of characters */
947 	val = vim_strnsave(value, len);
948     if (val == NULL)
949 	return;
950 
951     tv.v_type = VAR_STRING;
952     tv.vval.v_string = val;
953 
954     save_emsg = did_emsg;
955     did_emsg = FALSE;
956     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
957     err = did_emsg;
958     did_emsg += save_emsg;
959     if (err)
960 	var_redir_stop();
961 
962     vim_free(tv.vval.v_string);
963 }
964 
965 /*
966  * Stop redirecting command output to a variable.
967  */
968     void
969 var_redir_stop()
970 {
971     if (redir_lval != NULL)
972     {
973 	clear_lval(redir_lval);
974 	vim_free(redir_lval);
975 	redir_lval = NULL;
976     }
977     vim_free(redir_varname);
978     redir_varname = NULL;
979 }
980 
981 # if defined(FEAT_MBYTE) || defined(PROTO)
982     int
983 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
984     char_u	*enc_from;
985     char_u	*enc_to;
986     char_u	*fname_from;
987     char_u	*fname_to;
988 {
989     int		err = FALSE;
990 
991     set_vim_var_string(VV_CC_FROM, enc_from, -1);
992     set_vim_var_string(VV_CC_TO, enc_to, -1);
993     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
994     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
995     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
996 	err = TRUE;
997     set_vim_var_string(VV_CC_FROM, NULL, -1);
998     set_vim_var_string(VV_CC_TO, NULL, -1);
999     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1000     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1001 
1002     if (err)
1003 	return FAIL;
1004     return OK;
1005 }
1006 # endif
1007 
1008 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1009     int
1010 eval_printexpr(fname, args)
1011     char_u	*fname;
1012     char_u	*args;
1013 {
1014     int		err = FALSE;
1015 
1016     set_vim_var_string(VV_FNAME_IN, fname, -1);
1017     set_vim_var_string(VV_CMDARG, args, -1);
1018     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1019 	err = TRUE;
1020     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1021     set_vim_var_string(VV_CMDARG, NULL, -1);
1022 
1023     if (err)
1024     {
1025 	mch_remove(fname);
1026 	return FAIL;
1027     }
1028     return OK;
1029 }
1030 # endif
1031 
1032 # if defined(FEAT_DIFF) || defined(PROTO)
1033     void
1034 eval_diff(origfile, newfile, outfile)
1035     char_u	*origfile;
1036     char_u	*newfile;
1037     char_u	*outfile;
1038 {
1039     int		err = FALSE;
1040 
1041     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1042     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1043     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1044     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1045     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1046     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1047     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1048 }
1049 
1050     void
1051 eval_patch(origfile, difffile, outfile)
1052     char_u	*origfile;
1053     char_u	*difffile;
1054     char_u	*outfile;
1055 {
1056     int		err;
1057 
1058     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1059     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1060     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1061     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1062     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1063     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1064     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1065 }
1066 # endif
1067 
1068 /*
1069  * Top level evaluation function, returning a boolean.
1070  * Sets "error" to TRUE if there was an error.
1071  * Return TRUE or FALSE.
1072  */
1073     int
1074 eval_to_bool(arg, error, nextcmd, skip)
1075     char_u	*arg;
1076     int		*error;
1077     char_u	**nextcmd;
1078     int		skip;	    /* only parse, don't execute */
1079 {
1080     typval_T	tv;
1081     int		retval = FALSE;
1082 
1083     if (skip)
1084 	++emsg_skip;
1085     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1086 	*error = TRUE;
1087     else
1088     {
1089 	*error = FALSE;
1090 	if (!skip)
1091 	{
1092 	    retval = (get_tv_number_chk(&tv, error) != 0);
1093 	    clear_tv(&tv);
1094 	}
1095     }
1096     if (skip)
1097 	--emsg_skip;
1098 
1099     return retval;
1100 }
1101 
1102 /*
1103  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1104  * only parsing to "nextcmd" is done, without reporting errors.  Return
1105  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1106  */
1107     char_u *
1108 eval_to_string_skip(arg, nextcmd, skip)
1109     char_u	*arg;
1110     char_u	**nextcmd;
1111     int		skip;	    /* only parse, don't execute */
1112 {
1113     typval_T	tv;
1114     char_u	*retval;
1115 
1116     if (skip)
1117 	++emsg_skip;
1118     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1119 	retval = NULL;
1120     else
1121     {
1122 	retval = vim_strsave(get_tv_string(&tv));
1123 	clear_tv(&tv);
1124     }
1125     if (skip)
1126 	--emsg_skip;
1127 
1128     return retval;
1129 }
1130 
1131 /*
1132  * Skip over an expression at "*pp".
1133  * Return FAIL for an error, OK otherwise.
1134  */
1135     int
1136 skip_expr(pp)
1137     char_u	**pp;
1138 {
1139     typval_T	rettv;
1140 
1141     *pp = skipwhite(*pp);
1142     return eval1(pp, &rettv, FALSE);
1143 }
1144 
1145 /*
1146  * Top level evaluation function, returning a string.
1147  * Return pointer to allocated memory, or NULL for failure.
1148  */
1149     char_u *
1150 eval_to_string(arg, nextcmd)
1151     char_u	*arg;
1152     char_u	**nextcmd;
1153 {
1154     typval_T	tv;
1155     char_u	*retval;
1156 
1157     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1158 	retval = NULL;
1159     else
1160     {
1161 	retval = vim_strsave(get_tv_string(&tv));
1162 	clear_tv(&tv);
1163     }
1164 
1165     return retval;
1166 }
1167 
1168 /*
1169  * Call eval_to_string() with "sandbox" set and not using local variables.
1170  */
1171     char_u *
1172 eval_to_string_safe(arg, nextcmd)
1173     char_u	*arg;
1174     char_u	**nextcmd;
1175 {
1176     char_u	*retval;
1177     void	*save_funccalp;
1178 
1179     save_funccalp = save_funccal();
1180     ++sandbox;
1181     retval = eval_to_string(arg, nextcmd);
1182     --sandbox;
1183     restore_funccal(save_funccalp);
1184     return retval;
1185 }
1186 
1187 /*
1188  * Top level evaluation function, returning a number.
1189  * Evaluates "expr" silently.
1190  * Returns -1 for an error.
1191  */
1192     int
1193 eval_to_number(expr)
1194     char_u	*expr;
1195 {
1196     typval_T	rettv;
1197     int		retval;
1198     char_u	*p = skipwhite(expr);
1199 
1200     ++emsg_off;
1201 
1202     if (eval1(&p, &rettv, TRUE) == FAIL)
1203 	retval = -1;
1204     else
1205     {
1206 	retval = get_tv_number_chk(&rettv, NULL);
1207 	clear_tv(&rettv);
1208     }
1209     --emsg_off;
1210 
1211     return retval;
1212 }
1213 
1214 /*
1215  * Prepare v: variable "idx" to be used.
1216  * Save the current typeval in "save_tv".
1217  * When not used yet add the variable to the v: hashtable.
1218  */
1219     static void
1220 prepare_vimvar(idx, save_tv)
1221     int		idx;
1222     typval_T	*save_tv;
1223 {
1224     *save_tv = vimvars[idx].vv_tv;
1225     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1226 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1227 }
1228 
1229 /*
1230  * Restore v: variable "idx" to typeval "save_tv".
1231  * When no longer defined, remove the variable from the v: hashtable.
1232  */
1233     static void
1234 restore_vimvar(idx, save_tv)
1235     int		idx;
1236     typval_T	*save_tv;
1237 {
1238     hashitem_T	*hi;
1239 
1240     clear_tv(&vimvars[idx].vv_tv);
1241     vimvars[idx].vv_tv = *save_tv;
1242     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1243     {
1244 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1245 	if (HASHITEM_EMPTY(hi))
1246 	    EMSG2(_(e_intern2), "restore_vimvar()");
1247 	else
1248 	    hash_remove(&vimvarht, hi);
1249     }
1250 }
1251 
1252 #if defined(FEAT_SYN_HL) || defined(PROTO)
1253 /*
1254  * Evaluate an expression to a list with suggestions.
1255  * For the "expr:" part of 'spellsuggest'.
1256  */
1257     list_T *
1258 eval_spell_expr(badword, expr)
1259     char_u	*badword;
1260     char_u	*expr;
1261 {
1262     typval_T	save_val;
1263     typval_T	rettv;
1264     list_T	*list = NULL;
1265     char_u	*p = skipwhite(expr);
1266 
1267     /* Set "v:val" to the bad word. */
1268     prepare_vimvar(VV_VAL, &save_val);
1269     vimvars[VV_VAL].vv_type = VAR_STRING;
1270     vimvars[VV_VAL].vv_str = badword;
1271     if (p_verbose == 0)
1272 	++emsg_off;
1273 
1274     if (eval1(&p, &rettv, TRUE) == OK)
1275     {
1276 	if (rettv.v_type != VAR_LIST)
1277 	    clear_tv(&rettv);
1278 	else
1279 	    list = rettv.vval.v_list;
1280     }
1281 
1282     if (p_verbose == 0)
1283 	--emsg_off;
1284     vimvars[VV_VAL].vv_str = NULL;
1285     restore_vimvar(VV_VAL, &save_val);
1286 
1287     return list;
1288 }
1289 
1290 /*
1291  * "list" is supposed to contain two items: a word and a number.  Return the
1292  * word in "pp" and the number as the return value.
1293  * Return -1 if anything isn't right.
1294  * Used to get the good word and score from the eval_spell_expr() result.
1295  */
1296     int
1297 get_spellword(list, pp)
1298     list_T	*list;
1299     char_u	**pp;
1300 {
1301     listitem_T	*li;
1302 
1303     li = list->lv_first;
1304     if (li == NULL)
1305 	return -1;
1306     *pp = get_tv_string(&li->li_tv);
1307 
1308     li = li->li_next;
1309     if (li == NULL)
1310 	return -1;
1311     return get_tv_number(&li->li_tv);
1312 }
1313 #endif
1314 
1315 /*
1316  * Top level evaluation function,
1317  */
1318     typval_T *
1319 eval_expr(arg, nextcmd)
1320     char_u	*arg;
1321     char_u	**nextcmd;
1322 {
1323     typval_T	*tv;
1324 
1325     tv = (typval_T *)alloc(sizeof(typval_T));
1326     if (!tv)
1327 	return NULL;
1328 
1329     if (eval0(arg, tv, nextcmd, TRUE) == FAIL)
1330     {
1331 	vim_free(tv);
1332 	return NULL;
1333     }
1334 
1335     return tv;
1336 }
1337 
1338 
1339 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1340 /*
1341  * Call some vimL function and return the result in "*rettv".
1342  * Uses argv[argc] for the function arguments.
1343  * Returns OK or FAIL.
1344  */
1345     static int
1346 call_vim_function(func, argc, argv, safe, rettv)
1347     char_u      *func;
1348     int		argc;
1349     char_u      **argv;
1350     int		safe;		/* use the sandbox */
1351     typval_T	*rettv;
1352 {
1353     typval_T	*argvars;
1354     long	n;
1355     int		len;
1356     int		i;
1357     int		doesrange;
1358     void	*save_funccalp = NULL;
1359     int		ret;
1360 
1361     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1362     if (argvars == NULL)
1363 	return FAIL;
1364 
1365     for (i = 0; i < argc; i++)
1366     {
1367 	/* Pass a NULL or empty argument as an empty string */
1368 	if (argv[i] == NULL || *argv[i] == NUL)
1369 	{
1370 	    argvars[i].v_type = VAR_STRING;
1371 	    argvars[i].vval.v_string = (char_u *)"";
1372 	    continue;
1373 	}
1374 
1375 	/* Recognize a number argument, the others must be strings. */
1376 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1377 	if (len != 0 && len == (int)STRLEN(argv[i]))
1378 	{
1379 	    argvars[i].v_type = VAR_NUMBER;
1380 	    argvars[i].vval.v_number = n;
1381 	}
1382 	else
1383 	{
1384 	    argvars[i].v_type = VAR_STRING;
1385 	    argvars[i].vval.v_string = argv[i];
1386 	}
1387     }
1388 
1389     if (safe)
1390     {
1391 	save_funccalp = save_funccal();
1392 	++sandbox;
1393     }
1394 
1395     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1396     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1397 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1398 		    &doesrange, TRUE, NULL);
1399     if (safe)
1400     {
1401 	--sandbox;
1402 	restore_funccal(save_funccalp);
1403     }
1404     vim_free(argvars);
1405 
1406     if (ret == FAIL)
1407 	clear_tv(rettv);
1408 
1409     return ret;
1410 }
1411 
1412 /*
1413  * Call vimL function "func" and return the result as a string.
1414  * Returns NULL when calling the function fails.
1415  * Uses argv[argc] for the function arguments.
1416  */
1417     void *
1418 call_func_retstr(func, argc, argv, safe)
1419     char_u      *func;
1420     int		argc;
1421     char_u      **argv;
1422     int		safe;		/* use the sandbox */
1423 {
1424     typval_T	rettv;
1425     char_u	*retval;
1426 
1427     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1428 	return NULL;
1429 
1430     retval = vim_strsave(get_tv_string(&rettv));
1431     clear_tv(&rettv);
1432     return retval;
1433 }
1434 
1435 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1436 /*
1437  * Call vimL function "func" and return the result as a number.
1438  * Returns -1 when calling the function fails.
1439  * Uses argv[argc] for the function arguments.
1440  */
1441     long
1442 call_func_retnr(func, argc, argv, safe)
1443     char_u      *func;
1444     int		argc;
1445     char_u      **argv;
1446     int		safe;		/* use the sandbox */
1447 {
1448     typval_T	rettv;
1449     long	retval;
1450 
1451     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1452 	return -1;
1453 
1454     retval = get_tv_number_chk(&rettv, NULL);
1455     clear_tv(&rettv);
1456     return retval;
1457 }
1458 #endif
1459 
1460 /*
1461  * Call vimL function "func" and return the result as a list
1462  * Uses argv[argc] for the function arguments.
1463  */
1464     void *
1465 call_func_retlist(func, argc, argv, safe)
1466     char_u      *func;
1467     int		argc;
1468     char_u      **argv;
1469     int		safe;		/* use the sandbox */
1470 {
1471     typval_T	rettv;
1472 
1473     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1474 	return NULL;
1475 
1476     if (rettv.v_type != VAR_LIST)
1477     {
1478 	clear_tv(&rettv);
1479 	return NULL;
1480     }
1481 
1482     return rettv.vval.v_list;
1483 }
1484 
1485 #endif
1486 
1487 /*
1488  * Save the current function call pointer, and set it to NULL.
1489  * Used when executing autocommands and for ":source".
1490  */
1491     void *
1492 save_funccal()
1493 {
1494     funccall_T *fc = current_funccal;
1495 
1496     current_funccal = NULL;
1497     return (void *)fc;
1498 }
1499 
1500     void
1501 restore_funccal(vfc)
1502     void *vfc;
1503 {
1504     funccall_T *fc = (funccall_T *)vfc;
1505 
1506     current_funccal = fc;
1507 }
1508 
1509 #if defined(FEAT_PROFILE) || defined(PROTO)
1510 /*
1511  * Prepare profiling for entering a child or something else that is not
1512  * counted for the script/function itself.
1513  * Should always be called in pair with prof_child_exit().
1514  */
1515     void
1516 prof_child_enter(tm)
1517     proftime_T *tm;	/* place to store waittime */
1518 {
1519     funccall_T *fc = current_funccal;
1520 
1521     if (fc != NULL && fc->func->uf_profiling)
1522 	profile_start(&fc->prof_child);
1523     script_prof_save(tm);
1524 }
1525 
1526 /*
1527  * Take care of time spent in a child.
1528  * Should always be called after prof_child_enter().
1529  */
1530     void
1531 prof_child_exit(tm)
1532     proftime_T *tm;	/* where waittime was stored */
1533 {
1534     funccall_T *fc = current_funccal;
1535 
1536     if (fc != NULL && fc->func->uf_profiling)
1537     {
1538 	profile_end(&fc->prof_child);
1539 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1540 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1541 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1542     }
1543     script_prof_restore(tm);
1544 }
1545 #endif
1546 
1547 
1548 #ifdef FEAT_FOLDING
1549 /*
1550  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1551  * it in "*cp".  Doesn't give error messages.
1552  */
1553     int
1554 eval_foldexpr(arg, cp)
1555     char_u	*arg;
1556     int		*cp;
1557 {
1558     typval_T	tv;
1559     int		retval;
1560     char_u	*s;
1561 
1562     ++emsg_off;
1563     ++sandbox;
1564     *cp = NUL;
1565     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1566 	retval = 0;
1567     else
1568     {
1569 	/* If the result is a number, just return the number. */
1570 	if (tv.v_type == VAR_NUMBER)
1571 	    retval = tv.vval.v_number;
1572 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1573 	    retval = 0;
1574 	else
1575 	{
1576 	    /* If the result is a string, check if there is a non-digit before
1577 	     * the number. */
1578 	    s = tv.vval.v_string;
1579 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1580 		*cp = *s++;
1581 	    retval = atol((char *)s);
1582 	}
1583 	clear_tv(&tv);
1584     }
1585     --emsg_off;
1586     --sandbox;
1587 
1588     return retval;
1589 }
1590 #endif
1591 
1592 /*
1593  * ":let"			list all variable values
1594  * ":let var1 var2"		list variable values
1595  * ":let var = expr"		assignment command.
1596  * ":let var += expr"		assignment command.
1597  * ":let var -= expr"		assignment command.
1598  * ":let var .= expr"		assignment command.
1599  * ":let [var1, var2] = expr"	unpack list.
1600  */
1601     void
1602 ex_let(eap)
1603     exarg_T	*eap;
1604 {
1605     char_u	*arg = eap->arg;
1606     char_u	*expr = NULL;
1607     typval_T	rettv;
1608     int		i;
1609     int		var_count = 0;
1610     int		semicolon = 0;
1611     char_u	op[2];
1612 
1613     expr = skip_var_list(arg, &var_count, &semicolon);
1614     if (expr == NULL)
1615 	return;
1616     expr = vim_strchr(expr, '=');
1617     if (expr == NULL)
1618     {
1619 	/*
1620 	 * ":let" without "=": list variables
1621 	 */
1622 	if (*arg == '[')
1623 	    EMSG(_(e_invarg));
1624 	else if (!ends_excmd(*arg))
1625 	    /* ":let var1 var2" */
1626 	    arg = list_arg_vars(eap, arg);
1627 	else if (!eap->skip)
1628 	{
1629 	    /* ":let" */
1630 	    list_glob_vars();
1631 	    list_buf_vars();
1632 	    list_win_vars();
1633 	    list_vim_vars();
1634 	}
1635 	eap->nextcmd = check_nextcmd(arg);
1636     }
1637     else
1638     {
1639 	op[0] = '=';
1640 	op[1] = NUL;
1641 	if (expr > arg)
1642 	{
1643 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1644 		op[0] = expr[-1];   /* +=, -= or .= */
1645 	}
1646 	expr = skipwhite(expr + 1);
1647 
1648 	if (eap->skip)
1649 	    ++emsg_skip;
1650 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1651 	if (eap->skip)
1652 	{
1653 	    if (i != FAIL)
1654 		clear_tv(&rettv);
1655 	    --emsg_skip;
1656 	}
1657 	else if (i != FAIL)
1658 	{
1659 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1660 									  op);
1661 	    clear_tv(&rettv);
1662 	}
1663     }
1664 }
1665 
1666 /*
1667  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1668  * Handles both "var" with any type and "[var, var; var]" with a list type.
1669  * When "nextchars" is not NULL it points to a string with characters that
1670  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1671  * or concatenate.
1672  * Returns OK or FAIL;
1673  */
1674     static int
1675 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1676     char_u	*arg_start;
1677     typval_T	*tv;
1678     int		copy;		/* copy values from "tv", don't move */
1679     int		semicolon;	/* from skip_var_list() */
1680     int		var_count;	/* from skip_var_list() */
1681     char_u	*nextchars;
1682 {
1683     char_u	*arg = arg_start;
1684     list_T	*l;
1685     int		i;
1686     listitem_T	*item;
1687     typval_T	ltv;
1688 
1689     if (*arg != '[')
1690     {
1691 	/*
1692 	 * ":let var = expr" or ":for var in list"
1693 	 */
1694 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1695 	    return FAIL;
1696 	return OK;
1697     }
1698 
1699     /*
1700      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1701      */
1702     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1703     {
1704 	EMSG(_(e_listreq));
1705 	return FAIL;
1706     }
1707 
1708     i = list_len(l);
1709     if (semicolon == 0 && var_count < i)
1710     {
1711 	EMSG(_("E687: Less targets than List items"));
1712 	return FAIL;
1713     }
1714     if (var_count - semicolon > i)
1715     {
1716 	EMSG(_("E688: More targets than List items"));
1717 	return FAIL;
1718     }
1719 
1720     item = l->lv_first;
1721     while (*arg != ']')
1722     {
1723 	arg = skipwhite(arg + 1);
1724 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1725 	item = item->li_next;
1726 	if (arg == NULL)
1727 	    return FAIL;
1728 
1729 	arg = skipwhite(arg);
1730 	if (*arg == ';')
1731 	{
1732 	    /* Put the rest of the list (may be empty) in the var after ';'.
1733 	     * Create a new list for this. */
1734 	    l = list_alloc();
1735 	    if (l == NULL)
1736 		return FAIL;
1737 	    while (item != NULL)
1738 	    {
1739 		list_append_tv(l, &item->li_tv);
1740 		item = item->li_next;
1741 	    }
1742 
1743 	    ltv.v_type = VAR_LIST;
1744 	    ltv.v_lock = 0;
1745 	    ltv.vval.v_list = l;
1746 	    l->lv_refcount = 1;
1747 
1748 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1749 						    (char_u *)"]", nextchars);
1750 	    clear_tv(&ltv);
1751 	    if (arg == NULL)
1752 		return FAIL;
1753 	    break;
1754 	}
1755 	else if (*arg != ',' && *arg != ']')
1756 	{
1757 	    EMSG2(_(e_intern2), "ex_let_vars()");
1758 	    return FAIL;
1759 	}
1760     }
1761 
1762     return OK;
1763 }
1764 
1765 /*
1766  * Skip over assignable variable "var" or list of variables "[var, var]".
1767  * Used for ":let varvar = expr" and ":for varvar in expr".
1768  * For "[var, var]" increment "*var_count" for each variable.
1769  * for "[var, var; var]" set "semicolon".
1770  * Return NULL for an error.
1771  */
1772     static char_u *
1773 skip_var_list(arg, var_count, semicolon)
1774     char_u	*arg;
1775     int		*var_count;
1776     int		*semicolon;
1777 {
1778     char_u	*p, *s;
1779 
1780     if (*arg == '[')
1781     {
1782 	/* "[var, var]": find the matching ']'. */
1783 	p = arg;
1784 	for (;;)
1785 	{
1786 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1787 	    s = skip_var_one(p);
1788 	    if (s == p)
1789 	    {
1790 		EMSG2(_(e_invarg2), p);
1791 		return NULL;
1792 	    }
1793 	    ++*var_count;
1794 
1795 	    p = skipwhite(s);
1796 	    if (*p == ']')
1797 		break;
1798 	    else if (*p == ';')
1799 	    {
1800 		if (*semicolon == 1)
1801 		{
1802 		    EMSG(_("Double ; in list of variables"));
1803 		    return NULL;
1804 		}
1805 		*semicolon = 1;
1806 	    }
1807 	    else if (*p != ',')
1808 	    {
1809 		EMSG2(_(e_invarg2), p);
1810 		return NULL;
1811 	    }
1812 	}
1813 	return p + 1;
1814     }
1815     else
1816 	return skip_var_one(arg);
1817 }
1818 
1819 /*
1820  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1821  * l[idx].
1822  */
1823     static char_u *
1824 skip_var_one(arg)
1825     char_u	*arg;
1826 {
1827     if (*arg == '@' && arg[1] != NUL)
1828 	return arg + 2;
1829     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1830 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1831 }
1832 
1833 /*
1834  * List variables for hashtab "ht" with prefix "prefix".
1835  * If "empty" is TRUE also list NULL strings as empty strings.
1836  */
1837     static void
1838 list_hashtable_vars(ht, prefix, empty)
1839     hashtab_T	*ht;
1840     char_u	*prefix;
1841     int		empty;
1842 {
1843     hashitem_T	*hi;
1844     dictitem_T	*di;
1845     int		todo;
1846 
1847     todo = ht->ht_used;
1848     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1849     {
1850 	if (!HASHITEM_EMPTY(hi))
1851 	{
1852 	    --todo;
1853 	    di = HI2DI(hi);
1854 	    if (empty || di->di_tv.v_type != VAR_STRING
1855 					   || di->di_tv.vval.v_string != NULL)
1856 		list_one_var(di, prefix);
1857 	}
1858     }
1859 }
1860 
1861 /*
1862  * List global variables.
1863  */
1864     static void
1865 list_glob_vars()
1866 {
1867     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1868 }
1869 
1870 /*
1871  * List buffer variables.
1872  */
1873     static void
1874 list_buf_vars()
1875 {
1876     char_u	numbuf[NUMBUFLEN];
1877 
1878     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1879 
1880     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1881     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1882 }
1883 
1884 /*
1885  * List window variables.
1886  */
1887     static void
1888 list_win_vars()
1889 {
1890     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1891 }
1892 
1893 /*
1894  * List Vim variables.
1895  */
1896     static void
1897 list_vim_vars()
1898 {
1899     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1900 }
1901 
1902 /*
1903  * List variables in "arg".
1904  */
1905     static char_u *
1906 list_arg_vars(eap, arg)
1907     exarg_T	*eap;
1908     char_u	*arg;
1909 {
1910     int		error = FALSE;
1911     int		len;
1912     char_u	*name;
1913     char_u	*name_start;
1914     char_u	*arg_subsc;
1915     char_u	*tofree;
1916     typval_T    tv;
1917 
1918     while (!ends_excmd(*arg) && !got_int)
1919     {
1920 	if (error || eap->skip)
1921 	{
1922 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1923 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1924 	    {
1925 		emsg_severe = TRUE;
1926 		EMSG(_(e_trailing));
1927 		break;
1928 	    }
1929 	}
1930 	else
1931 	{
1932 	    /* get_name_len() takes care of expanding curly braces */
1933 	    name_start = name = arg;
1934 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1935 	    if (len <= 0)
1936 	    {
1937 		/* This is mainly to keep test 49 working: when expanding
1938 		 * curly braces fails overrule the exception error message. */
1939 		if (len < 0 && !aborting())
1940 		{
1941 		    emsg_severe = TRUE;
1942 		    EMSG2(_(e_invarg2), arg);
1943 		    break;
1944 		}
1945 		error = TRUE;
1946 	    }
1947 	    else
1948 	    {
1949 		if (tofree != NULL)
1950 		    name = tofree;
1951 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1952 		    error = TRUE;
1953 		else
1954 		{
1955 		    /* handle d.key, l[idx], f(expr) */
1956 		    arg_subsc = arg;
1957 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
1958 			error = TRUE;
1959 		    else
1960 		    {
1961 			if (arg == arg_subsc && len == 2 && name[1] == ':')
1962 			{
1963 			    switch (*name)
1964 			    {
1965 				case 'g': list_glob_vars(); break;
1966 				case 'b': list_buf_vars(); break;
1967 				case 'w': list_win_vars(); break;
1968 				case 'v': list_vim_vars(); break;
1969 				default:
1970 					  EMSG2(_("E738: Can't list variables for %s"), name);
1971 			    }
1972 			}
1973 			else
1974 			{
1975 			    char_u	numbuf[NUMBUFLEN];
1976 			    char_u	*tf;
1977 			    int		c;
1978 			    char_u	*s;
1979 
1980 			    s = echo_string(&tv, &tf, numbuf);
1981 			    c = *arg;
1982 			    *arg = NUL;
1983 			    list_one_var_a((char_u *)"",
1984 				    arg == arg_subsc ? name : name_start,
1985 				    tv.v_type, s == NULL ? (char_u *)"" : s);
1986 			    *arg = c;
1987 			    vim_free(tf);
1988 			}
1989 			clear_tv(&tv);
1990 		    }
1991 		}
1992 	    }
1993 
1994 	    vim_free(tofree);
1995 	}
1996 
1997 	arg = skipwhite(arg);
1998     }
1999 
2000     return arg;
2001 }
2002 
2003 /*
2004  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2005  * Returns a pointer to the char just after the var name.
2006  * Returns NULL if there is an error.
2007  */
2008     static char_u *
2009 ex_let_one(arg, tv, copy, endchars, op)
2010     char_u	*arg;		/* points to variable name */
2011     typval_T	*tv;		/* value to assign to variable */
2012     int		copy;		/* copy value from "tv" */
2013     char_u	*endchars;	/* valid chars after variable name  or NULL */
2014     char_u	*op;		/* "+", "-", "."  or NULL*/
2015 {
2016     int		c1;
2017     char_u	*name;
2018     char_u	*p;
2019     char_u	*arg_end = NULL;
2020     int		len;
2021     int		opt_flags;
2022     char_u	*tofree = NULL;
2023 
2024     /*
2025      * ":let $VAR = expr": Set environment variable.
2026      */
2027     if (*arg == '$')
2028     {
2029 	/* Find the end of the name. */
2030 	++arg;
2031 	name = arg;
2032 	len = get_env_len(&arg);
2033 	if (len == 0)
2034 	    EMSG2(_(e_invarg2), name - 1);
2035 	else
2036 	{
2037 	    if (op != NULL && (*op == '+' || *op == '-'))
2038 		EMSG2(_(e_letwrong), op);
2039 	    else if (endchars != NULL
2040 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2041 		EMSG(_(e_letunexp));
2042 	    else
2043 	    {
2044 		c1 = name[len];
2045 		name[len] = NUL;
2046 		p = get_tv_string_chk(tv);
2047 		if (p != NULL && op != NULL && *op == '.')
2048 		{
2049 		    int	    mustfree = FALSE;
2050 		    char_u  *s = vim_getenv(name, &mustfree);
2051 
2052 		    if (s != NULL)
2053 		    {
2054 			p = tofree = concat_str(s, p);
2055 			if (mustfree)
2056 			    vim_free(s);
2057 		    }
2058 		}
2059 		if (p != NULL)
2060 		{
2061 		    vim_setenv(name, p);
2062 		    if (STRICMP(name, "HOME") == 0)
2063 			init_homedir();
2064 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2065 			didset_vim = FALSE;
2066 		    else if (didset_vimruntime
2067 					&& STRICMP(name, "VIMRUNTIME") == 0)
2068 			didset_vimruntime = FALSE;
2069 		    arg_end = arg;
2070 		}
2071 		name[len] = c1;
2072 		vim_free(tofree);
2073 	    }
2074 	}
2075     }
2076 
2077     /*
2078      * ":let &option = expr": Set option value.
2079      * ":let &l:option = expr": Set local option value.
2080      * ":let &g:option = expr": Set global option value.
2081      */
2082     else if (*arg == '&')
2083     {
2084 	/* Find the end of the name. */
2085 	p = find_option_end(&arg, &opt_flags);
2086 	if (p == NULL || (endchars != NULL
2087 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2088 	    EMSG(_(e_letunexp));
2089 	else
2090 	{
2091 	    long	n;
2092 	    int		opt_type;
2093 	    long	numval;
2094 	    char_u	*stringval = NULL;
2095 	    char_u	*s;
2096 
2097 	    c1 = *p;
2098 	    *p = NUL;
2099 
2100 	    n = get_tv_number(tv);
2101 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2102 	    if (s != NULL && op != NULL && *op != '=')
2103 	    {
2104 		opt_type = get_option_value(arg, &numval,
2105 						       &stringval, opt_flags);
2106 		if ((opt_type == 1 && *op == '.')
2107 			|| (opt_type == 0 && *op != '.'))
2108 		    EMSG2(_(e_letwrong), op);
2109 		else
2110 		{
2111 		    if (opt_type == 1)  /* number */
2112 		    {
2113 			if (*op == '+')
2114 			    n = numval + n;
2115 			else
2116 			    n = numval - n;
2117 		    }
2118 		    else if (opt_type == 0 && stringval != NULL) /* string */
2119 		    {
2120 			s = concat_str(stringval, s);
2121 			vim_free(stringval);
2122 			stringval = s;
2123 		    }
2124 		}
2125 	    }
2126 	    if (s != NULL)
2127 	    {
2128 		set_option_value(arg, n, s, opt_flags);
2129 		arg_end = p;
2130 	    }
2131 	    *p = c1;
2132 	    vim_free(stringval);
2133 	}
2134     }
2135 
2136     /*
2137      * ":let @r = expr": Set register contents.
2138      */
2139     else if (*arg == '@')
2140     {
2141 	++arg;
2142 	if (op != NULL && (*op == '+' || *op == '-'))
2143 	    EMSG2(_(e_letwrong), op);
2144 	else if (endchars != NULL
2145 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2146 	    EMSG(_(e_letunexp));
2147 	else
2148 	{
2149 	    char_u	*tofree = NULL;
2150 	    char_u	*s;
2151 
2152 	    p = get_tv_string_chk(tv);
2153 	    if (p != NULL && op != NULL && *op == '.')
2154 	    {
2155 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2156 		if (s != NULL)
2157 		{
2158 		    p = tofree = concat_str(s, p);
2159 		    vim_free(s);
2160 		}
2161 	    }
2162 	    if (p != NULL)
2163 	    {
2164 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2165 		arg_end = arg + 1;
2166 	    }
2167 	    vim_free(tofree);
2168 	}
2169     }
2170 
2171     /*
2172      * ":let var = expr": Set internal variable.
2173      * ":let {expr} = expr": Idem, name made with curly braces
2174      */
2175     else if (eval_isnamec1(*arg) || *arg == '{')
2176     {
2177 	lval_T	lv;
2178 
2179 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2180 	if (p != NULL && lv.ll_name != NULL)
2181 	{
2182 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2183 		EMSG(_(e_letunexp));
2184 	    else
2185 	    {
2186 		set_var_lval(&lv, p, tv, copy, op);
2187 		arg_end = p;
2188 	    }
2189 	}
2190 	clear_lval(&lv);
2191     }
2192 
2193     else
2194 	EMSG2(_(e_invarg2), arg);
2195 
2196     return arg_end;
2197 }
2198 
2199 /*
2200  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2201  */
2202     static int
2203 check_changedtick(arg)
2204     char_u	*arg;
2205 {
2206     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2207     {
2208 	EMSG2(_(e_readonlyvar), arg);
2209 	return TRUE;
2210     }
2211     return FALSE;
2212 }
2213 
2214 /*
2215  * Get an lval: variable, Dict item or List item that can be assigned a value
2216  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2217  * "name.key", "name.key[expr]" etc.
2218  * Indexing only works if "name" is an existing List or Dictionary.
2219  * "name" points to the start of the name.
2220  * If "rettv" is not NULL it points to the value to be assigned.
2221  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2222  * wrong; must end in space or cmd separator.
2223  *
2224  * Returns a pointer to just after the name, including indexes.
2225  * When an evaluation error occurs "lp->ll_name" is NULL;
2226  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2227  */
2228     static char_u *
2229 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2230     char_u	*name;
2231     typval_T	*rettv;
2232     lval_T	*lp;
2233     int		unlet;
2234     int		skip;
2235     int		quiet;	    /* don't give error messages */
2236     int		fne_flags;  /* flags for find_name_end() */
2237 {
2238     char_u	*p;
2239     char_u	*expr_start, *expr_end;
2240     int		cc;
2241     dictitem_T	*v;
2242     typval_T	var1;
2243     typval_T	var2;
2244     int		empty1 = FALSE;
2245     listitem_T	*ni;
2246     char_u	*key = NULL;
2247     int		len;
2248     hashtab_T	*ht;
2249 
2250     /* Clear everything in "lp". */
2251     vim_memset(lp, 0, sizeof(lval_T));
2252 
2253     if (skip)
2254     {
2255 	/* When skipping just find the end of the name. */
2256 	lp->ll_name = name;
2257 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2258     }
2259 
2260     /* Find the end of the name. */
2261     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2262     if (expr_start != NULL)
2263     {
2264 	/* Don't expand the name when we already know there is an error. */
2265 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2266 						    && *p != '[' && *p != '.')
2267 	{
2268 	    EMSG(_(e_trailing));
2269 	    return NULL;
2270 	}
2271 
2272 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2273 	if (lp->ll_exp_name == NULL)
2274 	{
2275 	    /* Report an invalid expression in braces, unless the
2276 	     * expression evaluation has been cancelled due to an
2277 	     * aborting error, an interrupt, or an exception. */
2278 	    if (!aborting() && !quiet)
2279 	    {
2280 		emsg_severe = TRUE;
2281 		EMSG2(_(e_invarg2), name);
2282 		return NULL;
2283 	    }
2284 	}
2285 	lp->ll_name = lp->ll_exp_name;
2286     }
2287     else
2288 	lp->ll_name = name;
2289 
2290     /* Without [idx] or .key we are done. */
2291     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2292 	return p;
2293 
2294     cc = *p;
2295     *p = NUL;
2296     v = find_var(lp->ll_name, &ht);
2297     if (v == NULL && !quiet)
2298 	EMSG2(_(e_undefvar), lp->ll_name);
2299     *p = cc;
2300     if (v == NULL)
2301 	return NULL;
2302 
2303     /*
2304      * Loop until no more [idx] or .key is following.
2305      */
2306     lp->ll_tv = &v->di_tv;
2307     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2308     {
2309 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2310 		&& !(lp->ll_tv->v_type == VAR_DICT
2311 					   && lp->ll_tv->vval.v_dict != NULL))
2312 	{
2313 	    if (!quiet)
2314 		EMSG(_("E689: Can only index a List or Dictionary"));
2315 	    return NULL;
2316 	}
2317 	if (lp->ll_range)
2318 	{
2319 	    if (!quiet)
2320 		EMSG(_("E708: [:] must come last"));
2321 	    return NULL;
2322 	}
2323 
2324 	len = -1;
2325 	if (*p == '.')
2326 	{
2327 	    key = p + 1;
2328 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2329 		;
2330 	    if (len == 0)
2331 	    {
2332 		if (!quiet)
2333 		    EMSG(_(e_emptykey));
2334 		return NULL;
2335 	    }
2336 	    p = key + len;
2337 	}
2338 	else
2339 	{
2340 	    /* Get the index [expr] or the first index [expr: ]. */
2341 	    p = skipwhite(p + 1);
2342 	    if (*p == ':')
2343 		empty1 = TRUE;
2344 	    else
2345 	    {
2346 		empty1 = FALSE;
2347 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2348 		    return NULL;
2349 		if (get_tv_string_chk(&var1) == NULL)
2350 		{
2351 		    /* not a number or string */
2352 		    clear_tv(&var1);
2353 		    return NULL;
2354 		}
2355 	    }
2356 
2357 	    /* Optionally get the second index [ :expr]. */
2358 	    if (*p == ':')
2359 	    {
2360 		if (lp->ll_tv->v_type == VAR_DICT)
2361 		{
2362 		    if (!quiet)
2363 			EMSG(_(e_dictrange));
2364 		    if (!empty1)
2365 			clear_tv(&var1);
2366 		    return NULL;
2367 		}
2368 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2369 					       || rettv->vval.v_list == NULL))
2370 		{
2371 		    if (!quiet)
2372 			EMSG(_("E709: [:] requires a List value"));
2373 		    if (!empty1)
2374 			clear_tv(&var1);
2375 		    return NULL;
2376 		}
2377 		p = skipwhite(p + 1);
2378 		if (*p == ']')
2379 		    lp->ll_empty2 = TRUE;
2380 		else
2381 		{
2382 		    lp->ll_empty2 = FALSE;
2383 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2384 		    {
2385 			if (!empty1)
2386 			    clear_tv(&var1);
2387 			return NULL;
2388 		    }
2389 		    if (get_tv_string_chk(&var2) == NULL)
2390 		    {
2391 			/* not a number or string */
2392 			if (!empty1)
2393 			    clear_tv(&var1);
2394 			clear_tv(&var2);
2395 			return NULL;
2396 		    }
2397 		}
2398 		lp->ll_range = TRUE;
2399 	    }
2400 	    else
2401 		lp->ll_range = FALSE;
2402 
2403 	    if (*p != ']')
2404 	    {
2405 		if (!quiet)
2406 		    EMSG(_(e_missbrac));
2407 		if (!empty1)
2408 		    clear_tv(&var1);
2409 		if (lp->ll_range && !lp->ll_empty2)
2410 		    clear_tv(&var2);
2411 		return NULL;
2412 	    }
2413 
2414 	    /* Skip to past ']'. */
2415 	    ++p;
2416 	}
2417 
2418 	if (lp->ll_tv->v_type == VAR_DICT)
2419 	{
2420 	    if (len == -1)
2421 	    {
2422 		/* "[key]": get key from "var1" */
2423 		key = get_tv_string(&var1);	/* is number or string */
2424 		if (*key == NUL)
2425 		{
2426 		    if (!quiet)
2427 			EMSG(_(e_emptykey));
2428 		    clear_tv(&var1);
2429 		    return NULL;
2430 		}
2431 	    }
2432 	    lp->ll_list = NULL;
2433 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2434 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2435 	    if (lp->ll_di == NULL)
2436 	    {
2437 		/* Key does not exist in dict: may need to add it. */
2438 		if (*p == '[' || *p == '.' || unlet)
2439 		{
2440 		    if (!quiet)
2441 			EMSG2(_(e_dictkey), key);
2442 		    if (len == -1)
2443 			clear_tv(&var1);
2444 		    return NULL;
2445 		}
2446 		if (len == -1)
2447 		    lp->ll_newkey = vim_strsave(key);
2448 		else
2449 		    lp->ll_newkey = vim_strnsave(key, len);
2450 		if (len == -1)
2451 		    clear_tv(&var1);
2452 		if (lp->ll_newkey == NULL)
2453 		    p = NULL;
2454 		break;
2455 	    }
2456 	    if (len == -1)
2457 		clear_tv(&var1);
2458 	    lp->ll_tv = &lp->ll_di->di_tv;
2459 	}
2460 	else
2461 	{
2462 	    /*
2463 	     * Get the number and item for the only or first index of the List.
2464 	     */
2465 	    if (empty1)
2466 		lp->ll_n1 = 0;
2467 	    else
2468 	    {
2469 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2470 		clear_tv(&var1);
2471 	    }
2472 	    lp->ll_dict = NULL;
2473 	    lp->ll_list = lp->ll_tv->vval.v_list;
2474 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2475 	    if (lp->ll_li == NULL)
2476 	    {
2477 		if (!quiet)
2478 		    EMSGN(_(e_listidx), lp->ll_n1);
2479 		if (lp->ll_range && !lp->ll_empty2)
2480 		    clear_tv(&var2);
2481 		return NULL;
2482 	    }
2483 
2484 	    /*
2485 	     * May need to find the item or absolute index for the second
2486 	     * index of a range.
2487 	     * When no index given: "lp->ll_empty2" is TRUE.
2488 	     * Otherwise "lp->ll_n2" is set to the second index.
2489 	     */
2490 	    if (lp->ll_range && !lp->ll_empty2)
2491 	    {
2492 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2493 		clear_tv(&var2);
2494 		if (lp->ll_n2 < 0)
2495 		{
2496 		    ni = list_find(lp->ll_list, lp->ll_n2);
2497 		    if (ni == NULL)
2498 		    {
2499 			if (!quiet)
2500 			    EMSGN(_(e_listidx), lp->ll_n2);
2501 			return NULL;
2502 		    }
2503 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2504 		}
2505 
2506 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2507 		if (lp->ll_n1 < 0)
2508 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2509 		if (lp->ll_n2 < lp->ll_n1)
2510 		{
2511 		    if (!quiet)
2512 			EMSGN(_(e_listidx), lp->ll_n2);
2513 		    return NULL;
2514 		}
2515 	    }
2516 
2517 	    lp->ll_tv = &lp->ll_li->li_tv;
2518 	}
2519     }
2520 
2521     return p;
2522 }
2523 
2524 /*
2525  * Clear lval "lp" that was filled by get_lval().
2526  */
2527     static void
2528 clear_lval(lp)
2529     lval_T	*lp;
2530 {
2531     vim_free(lp->ll_exp_name);
2532     vim_free(lp->ll_newkey);
2533 }
2534 
2535 /*
2536  * Set a variable that was parsed by get_lval() to "rettv".
2537  * "endp" points to just after the parsed name.
2538  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2539  */
2540     static void
2541 set_var_lval(lp, endp, rettv, copy, op)
2542     lval_T	*lp;
2543     char_u	*endp;
2544     typval_T	*rettv;
2545     int		copy;
2546     char_u	*op;
2547 {
2548     int		cc;
2549     listitem_T	*ni;
2550     listitem_T	*ri;
2551     dictitem_T	*di;
2552 
2553     if (lp->ll_tv == NULL)
2554     {
2555 	if (!check_changedtick(lp->ll_name))
2556 	{
2557 	    cc = *endp;
2558 	    *endp = NUL;
2559 	    if (op != NULL && *op != '=')
2560 	    {
2561 		typval_T tv;
2562 
2563 		/* handle +=, -= and .= */
2564 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2565 							     &tv, TRUE) == OK)
2566 		{
2567 		    if (tv_op(&tv, rettv, op) == OK)
2568 			set_var(lp->ll_name, &tv, FALSE);
2569 		    clear_tv(&tv);
2570 		}
2571 	    }
2572 	    else
2573 		set_var(lp->ll_name, rettv, copy);
2574 	    *endp = cc;
2575 	}
2576     }
2577     else if (tv_check_lock(lp->ll_newkey == NULL
2578 		? lp->ll_tv->v_lock
2579 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2580 	;
2581     else if (lp->ll_range)
2582     {
2583 	/*
2584 	 * Assign the List values to the list items.
2585 	 */
2586 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2587 	{
2588 	    if (op != NULL && *op != '=')
2589 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2590 	    else
2591 	    {
2592 		clear_tv(&lp->ll_li->li_tv);
2593 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2594 	    }
2595 	    ri = ri->li_next;
2596 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2597 		break;
2598 	    if (lp->ll_li->li_next == NULL)
2599 	    {
2600 		/* Need to add an empty item. */
2601 		ni = listitem_alloc();
2602 		if (ni == NULL)
2603 		{
2604 		    ri = NULL;
2605 		    break;
2606 		}
2607 		ni->li_tv.v_type = VAR_NUMBER;
2608 		ni->li_tv.v_lock = 0;
2609 		ni->li_tv.vval.v_number = 0;
2610 		list_append(lp->ll_list, ni);
2611 	    }
2612 	    lp->ll_li = lp->ll_li->li_next;
2613 	    ++lp->ll_n1;
2614 	}
2615 	if (ri != NULL)
2616 	    EMSG(_("E710: List value has more items than target"));
2617 	else if (lp->ll_empty2
2618 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2619 		: lp->ll_n1 != lp->ll_n2)
2620 	    EMSG(_("E711: List value has not enough items"));
2621     }
2622     else
2623     {
2624 	/*
2625 	 * Assign to a List or Dictionary item.
2626 	 */
2627 	if (lp->ll_newkey != NULL)
2628 	{
2629 	    if (op != NULL && *op != '=')
2630 	    {
2631 		EMSG2(_(e_letwrong), op);
2632 		return;
2633 	    }
2634 
2635 	    /* Need to add an item to the Dictionary. */
2636 	    di = dictitem_alloc(lp->ll_newkey);
2637 	    if (di == NULL)
2638 		return;
2639 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2640 	    {
2641 		vim_free(di);
2642 		return;
2643 	    }
2644 	    lp->ll_tv = &di->di_tv;
2645 	}
2646 	else if (op != NULL && *op != '=')
2647 	{
2648 	    tv_op(lp->ll_tv, rettv, op);
2649 	    return;
2650 	}
2651 	else
2652 	    clear_tv(lp->ll_tv);
2653 
2654 	/*
2655 	 * Assign the value to the variable or list item.
2656 	 */
2657 	if (copy)
2658 	    copy_tv(rettv, lp->ll_tv);
2659 	else
2660 	{
2661 	    *lp->ll_tv = *rettv;
2662 	    lp->ll_tv->v_lock = 0;
2663 	    init_tv(rettv);
2664 	}
2665     }
2666 }
2667 
2668 /*
2669  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2670  * Returns OK or FAIL.
2671  */
2672     static int
2673 tv_op(tv1, tv2, op)
2674     typval_T *tv1;
2675     typval_T *tv2;
2676     char_u  *op;
2677 {
2678     long	n;
2679     char_u	numbuf[NUMBUFLEN];
2680     char_u	*s;
2681 
2682     /* Can't do anything with a Funcref or a Dict on the right. */
2683     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2684     {
2685 	switch (tv1->v_type)
2686 	{
2687 	    case VAR_DICT:
2688 	    case VAR_FUNC:
2689 		break;
2690 
2691 	    case VAR_LIST:
2692 		if (*op != '+' || tv2->v_type != VAR_LIST)
2693 		    break;
2694 		/* List += List */
2695 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2696 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2697 		return OK;
2698 
2699 	    case VAR_NUMBER:
2700 	    case VAR_STRING:
2701 		if (tv2->v_type == VAR_LIST)
2702 		    break;
2703 		if (*op == '+' || *op == '-')
2704 		{
2705 		    /* nr += nr  or  nr -= nr*/
2706 		    n = get_tv_number(tv1);
2707 		    if (*op == '+')
2708 			n += get_tv_number(tv2);
2709 		    else
2710 			n -= get_tv_number(tv2);
2711 		    clear_tv(tv1);
2712 		    tv1->v_type = VAR_NUMBER;
2713 		    tv1->vval.v_number = n;
2714 		}
2715 		else
2716 		{
2717 		    /* str .= str */
2718 		    s = get_tv_string(tv1);
2719 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2720 		    clear_tv(tv1);
2721 		    tv1->v_type = VAR_STRING;
2722 		    tv1->vval.v_string = s;
2723 		}
2724 		return OK;
2725 	}
2726     }
2727 
2728     EMSG2(_(e_letwrong), op);
2729     return FAIL;
2730 }
2731 
2732 /*
2733  * Add a watcher to a list.
2734  */
2735     static void
2736 list_add_watch(l, lw)
2737     list_T	*l;
2738     listwatch_T	*lw;
2739 {
2740     lw->lw_next = l->lv_watch;
2741     l->lv_watch = lw;
2742 }
2743 
2744 /*
2745  * Remove a watcher from a list.
2746  * No warning when it isn't found...
2747  */
2748     static void
2749 list_rem_watch(l, lwrem)
2750     list_T	*l;
2751     listwatch_T	*lwrem;
2752 {
2753     listwatch_T	*lw, **lwp;
2754 
2755     lwp = &l->lv_watch;
2756     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2757     {
2758 	if (lw == lwrem)
2759 	{
2760 	    *lwp = lw->lw_next;
2761 	    break;
2762 	}
2763 	lwp = &lw->lw_next;
2764     }
2765 }
2766 
2767 /*
2768  * Just before removing an item from a list: advance watchers to the next
2769  * item.
2770  */
2771     static void
2772 list_fix_watch(l, item)
2773     list_T	*l;
2774     listitem_T	*item;
2775 {
2776     listwatch_T	*lw;
2777 
2778     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2779 	if (lw->lw_item == item)
2780 	    lw->lw_item = item->li_next;
2781 }
2782 
2783 /*
2784  * Evaluate the expression used in a ":for var in expr" command.
2785  * "arg" points to "var".
2786  * Set "*errp" to TRUE for an error, FALSE otherwise;
2787  * Return a pointer that holds the info.  Null when there is an error.
2788  */
2789     void *
2790 eval_for_line(arg, errp, nextcmdp, skip)
2791     char_u	*arg;
2792     int		*errp;
2793     char_u	**nextcmdp;
2794     int		skip;
2795 {
2796     forinfo_T	*fi;
2797     char_u	*expr;
2798     typval_T	tv;
2799     list_T	*l;
2800 
2801     *errp = TRUE;	/* default: there is an error */
2802 
2803     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2804     if (fi == NULL)
2805 	return NULL;
2806 
2807     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2808     if (expr == NULL)
2809 	return fi;
2810 
2811     expr = skipwhite(expr);
2812     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2813     {
2814 	EMSG(_("E690: Missing \"in\" after :for"));
2815 	return fi;
2816     }
2817 
2818     if (skip)
2819 	++emsg_skip;
2820     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2821     {
2822 	*errp = FALSE;
2823 	if (!skip)
2824 	{
2825 	    l = tv.vval.v_list;
2826 	    if (tv.v_type != VAR_LIST || l == NULL)
2827 	    {
2828 		EMSG(_(e_listreq));
2829 		clear_tv(&tv);
2830 	    }
2831 	    else
2832 	    {
2833 		fi->fi_list = l;
2834 		list_add_watch(l, &fi->fi_lw);
2835 		fi->fi_lw.lw_item = l->lv_first;
2836 	    }
2837 	}
2838     }
2839     if (skip)
2840 	--emsg_skip;
2841 
2842     return fi;
2843 }
2844 
2845 /*
2846  * Use the first item in a ":for" list.  Advance to the next.
2847  * Assign the values to the variable (list).  "arg" points to the first one.
2848  * Return TRUE when a valid item was found, FALSE when at end of list or
2849  * something wrong.
2850  */
2851     int
2852 next_for_item(fi_void, arg)
2853     void	*fi_void;
2854     char_u	*arg;
2855 {
2856     forinfo_T    *fi = (forinfo_T *)fi_void;
2857     int		result;
2858     listitem_T	*item;
2859 
2860     item = fi->fi_lw.lw_item;
2861     if (item == NULL)
2862 	result = FALSE;
2863     else
2864     {
2865 	fi->fi_lw.lw_item = item->li_next;
2866 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2867 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2868     }
2869     return result;
2870 }
2871 
2872 /*
2873  * Free the structure used to store info used by ":for".
2874  */
2875     void
2876 free_for_info(fi_void)
2877     void *fi_void;
2878 {
2879     forinfo_T    *fi = (forinfo_T *)fi_void;
2880 
2881     if (fi != NULL && fi->fi_list != NULL)
2882     {
2883 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2884 	list_unref(fi->fi_list);
2885     }
2886     vim_free(fi);
2887 }
2888 
2889 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2890 
2891     void
2892 set_context_for_expression(xp, arg, cmdidx)
2893     expand_T	*xp;
2894     char_u	*arg;
2895     cmdidx_T	cmdidx;
2896 {
2897     int		got_eq = FALSE;
2898     int		c;
2899     char_u	*p;
2900 
2901     if (cmdidx == CMD_let)
2902     {
2903 	xp->xp_context = EXPAND_USER_VARS;
2904 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2905 	{
2906 	    /* ":let var1 var2 ...": find last space. */
2907 	    for (p = arg + STRLEN(arg); p >= arg; )
2908 	    {
2909 		xp->xp_pattern = p;
2910 		mb_ptr_back(arg, p);
2911 		if (vim_iswhite(*p))
2912 		    break;
2913 	    }
2914 	    return;
2915 	}
2916     }
2917     else
2918 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2919 							  : EXPAND_EXPRESSION;
2920     while ((xp->xp_pattern = vim_strpbrk(arg,
2921 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2922     {
2923 	c = *xp->xp_pattern;
2924 	if (c == '&')
2925 	{
2926 	    c = xp->xp_pattern[1];
2927 	    if (c == '&')
2928 	    {
2929 		++xp->xp_pattern;
2930 		xp->xp_context = cmdidx != CMD_let || got_eq
2931 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2932 	    }
2933 	    else if (c != ' ')
2934 	    {
2935 		xp->xp_context = EXPAND_SETTINGS;
2936 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2937 		    xp->xp_pattern += 2;
2938 
2939 	    }
2940 	}
2941 	else if (c == '$')
2942 	{
2943 	    /* environment variable */
2944 	    xp->xp_context = EXPAND_ENV_VARS;
2945 	}
2946 	else if (c == '=')
2947 	{
2948 	    got_eq = TRUE;
2949 	    xp->xp_context = EXPAND_EXPRESSION;
2950 	}
2951 	else if (c == '<'
2952 		&& xp->xp_context == EXPAND_FUNCTIONS
2953 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2954 	{
2955 	    /* Function name can start with "<SNR>" */
2956 	    break;
2957 	}
2958 	else if (cmdidx != CMD_let || got_eq)
2959 	{
2960 	    if (c == '"')	    /* string */
2961 	    {
2962 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
2963 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
2964 			++xp->xp_pattern;
2965 		xp->xp_context = EXPAND_NOTHING;
2966 	    }
2967 	    else if (c == '\'')	    /* literal string */
2968 	    {
2969 		/* Trick: '' is like stopping and starting a literal string. */
2970 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
2971 		    /* skip */ ;
2972 		xp->xp_context = EXPAND_NOTHING;
2973 	    }
2974 	    else if (c == '|')
2975 	    {
2976 		if (xp->xp_pattern[1] == '|')
2977 		{
2978 		    ++xp->xp_pattern;
2979 		    xp->xp_context = EXPAND_EXPRESSION;
2980 		}
2981 		else
2982 		    xp->xp_context = EXPAND_COMMANDS;
2983 	    }
2984 	    else
2985 		xp->xp_context = EXPAND_EXPRESSION;
2986 	}
2987 	else
2988 	    /* Doesn't look like something valid, expand as an expression
2989 	     * anyway. */
2990 	    xp->xp_context = EXPAND_EXPRESSION;
2991 	arg = xp->xp_pattern;
2992 	if (*arg != NUL)
2993 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
2994 		/* skip */ ;
2995     }
2996     xp->xp_pattern = arg;
2997 }
2998 
2999 #endif /* FEAT_CMDL_COMPL */
3000 
3001 /*
3002  * ":1,25call func(arg1, arg2)"	function call.
3003  */
3004     void
3005 ex_call(eap)
3006     exarg_T	*eap;
3007 {
3008     char_u	*arg = eap->arg;
3009     char_u	*startarg;
3010     char_u	*name;
3011     char_u	*tofree;
3012     int		len;
3013     typval_T	rettv;
3014     linenr_T	lnum;
3015     int		doesrange;
3016     int		failed = FALSE;
3017     funcdict_T	fudi;
3018 
3019     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3020     vim_free(fudi.fd_newkey);
3021     if (tofree == NULL)
3022 	return;
3023 
3024     /* Increase refcount on dictionary, it could get deleted when evaluating
3025      * the arguments. */
3026     if (fudi.fd_dict != NULL)
3027 	++fudi.fd_dict->dv_refcount;
3028 
3029     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3030     len = STRLEN(tofree);
3031     name = deref_func_name(tofree, &len);
3032 
3033     /* Skip white space to allow ":call func ()".  Not good, but required for
3034      * backward compatibility. */
3035     startarg = skipwhite(arg);
3036     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3037 
3038     if (*startarg != '(')
3039     {
3040 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3041 	goto end;
3042     }
3043 
3044     /*
3045      * When skipping, evaluate the function once, to find the end of the
3046      * arguments.
3047      * When the function takes a range, this is discovered after the first
3048      * call, and the loop is broken.
3049      */
3050     if (eap->skip)
3051     {
3052 	++emsg_skip;
3053 	lnum = eap->line2;	/* do it once, also with an invalid range */
3054     }
3055     else
3056 	lnum = eap->line1;
3057     for ( ; lnum <= eap->line2; ++lnum)
3058     {
3059 	if (!eap->skip && eap->addr_count > 0)
3060 	{
3061 	    curwin->w_cursor.lnum = lnum;
3062 	    curwin->w_cursor.col = 0;
3063 	}
3064 	arg = startarg;
3065 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3066 		    eap->line1, eap->line2, &doesrange,
3067 					    !eap->skip, fudi.fd_dict) == FAIL)
3068 	{
3069 	    failed = TRUE;
3070 	    break;
3071 	}
3072 	clear_tv(&rettv);
3073 	if (doesrange || eap->skip)
3074 	    break;
3075 	/* Stop when immediately aborting on error, or when an interrupt
3076 	 * occurred or an exception was thrown but not caught.
3077 	 * get_func_tv() returned OK, so that the check for trailing
3078 	 * characters below is executed. */
3079 	if (aborting())
3080 	    break;
3081     }
3082     if (eap->skip)
3083 	--emsg_skip;
3084 
3085     if (!failed)
3086     {
3087 	/* Check for trailing illegal characters and a following command. */
3088 	if (!ends_excmd(*arg))
3089 	{
3090 	    emsg_severe = TRUE;
3091 	    EMSG(_(e_trailing));
3092 	}
3093 	else
3094 	    eap->nextcmd = check_nextcmd(arg);
3095     }
3096 
3097 end:
3098     dict_unref(fudi.fd_dict);
3099     vim_free(tofree);
3100 }
3101 
3102 /*
3103  * ":unlet[!] var1 ... " command.
3104  */
3105     void
3106 ex_unlet(eap)
3107     exarg_T	*eap;
3108 {
3109     ex_unletlock(eap, eap->arg, 0);
3110 }
3111 
3112 /*
3113  * ":lockvar" and ":unlockvar" commands
3114  */
3115     void
3116 ex_lockvar(eap)
3117     exarg_T	*eap;
3118 {
3119     char_u	*arg = eap->arg;
3120     int		deep = 2;
3121 
3122     if (eap->forceit)
3123 	deep = -1;
3124     else if (vim_isdigit(*arg))
3125     {
3126 	deep = getdigits(&arg);
3127 	arg = skipwhite(arg);
3128     }
3129 
3130     ex_unletlock(eap, arg, deep);
3131 }
3132 
3133 /*
3134  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3135  */
3136     static void
3137 ex_unletlock(eap, argstart, deep)
3138     exarg_T	*eap;
3139     char_u	*argstart;
3140     int		deep;
3141 {
3142     char_u	*arg = argstart;
3143     char_u	*name_end;
3144     int		error = FALSE;
3145     lval_T	lv;
3146 
3147     do
3148     {
3149 	/* Parse the name and find the end. */
3150 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3151 							     FNE_CHECK_START);
3152 	if (lv.ll_name == NULL)
3153 	    error = TRUE;	    /* error but continue parsing */
3154 	if (name_end == NULL || (!vim_iswhite(*name_end)
3155 						   && !ends_excmd(*name_end)))
3156 	{
3157 	    if (name_end != NULL)
3158 	    {
3159 		emsg_severe = TRUE;
3160 		EMSG(_(e_trailing));
3161 	    }
3162 	    if (!(eap->skip || error))
3163 		clear_lval(&lv);
3164 	    break;
3165 	}
3166 
3167 	if (!error && !eap->skip)
3168 	{
3169 	    if (eap->cmdidx == CMD_unlet)
3170 	    {
3171 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3172 		    error = TRUE;
3173 	    }
3174 	    else
3175 	    {
3176 		if (do_lock_var(&lv, name_end, deep,
3177 					  eap->cmdidx == CMD_lockvar) == FAIL)
3178 		    error = TRUE;
3179 	    }
3180 	}
3181 
3182 	if (!eap->skip)
3183 	    clear_lval(&lv);
3184 
3185 	arg = skipwhite(name_end);
3186     } while (!ends_excmd(*arg));
3187 
3188     eap->nextcmd = check_nextcmd(arg);
3189 }
3190 
3191     static int
3192 do_unlet_var(lp, name_end, forceit)
3193     lval_T	*lp;
3194     char_u	*name_end;
3195     int		forceit;
3196 {
3197     int		ret = OK;
3198     int		cc;
3199 
3200     if (lp->ll_tv == NULL)
3201     {
3202 	cc = *name_end;
3203 	*name_end = NUL;
3204 
3205 	/* Normal name or expanded name. */
3206 	if (check_changedtick(lp->ll_name))
3207 	    ret = FAIL;
3208 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3209 	    ret = FAIL;
3210 	*name_end = cc;
3211     }
3212     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3213 	return FAIL;
3214     else if (lp->ll_range)
3215     {
3216 	listitem_T    *li;
3217 
3218 	/* Delete a range of List items. */
3219 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3220 	{
3221 	    li = lp->ll_li->li_next;
3222 	    listitem_remove(lp->ll_list, lp->ll_li);
3223 	    lp->ll_li = li;
3224 	    ++lp->ll_n1;
3225 	}
3226     }
3227     else
3228     {
3229 	if (lp->ll_list != NULL)
3230 	    /* unlet a List item. */
3231 	    listitem_remove(lp->ll_list, lp->ll_li);
3232 	else
3233 	    /* unlet a Dictionary item. */
3234 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3235     }
3236 
3237     return ret;
3238 }
3239 
3240 /*
3241  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3242  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3243  */
3244     int
3245 do_unlet(name, forceit)
3246     char_u	*name;
3247     int		forceit;
3248 {
3249     hashtab_T	*ht;
3250     hashitem_T	*hi;
3251     char_u	*varname;
3252 
3253     ht = find_var_ht(name, &varname);
3254     if (ht != NULL && *varname != NUL)
3255     {
3256 	hi = hash_find(ht, varname);
3257 	if (!HASHITEM_EMPTY(hi))
3258 	{
3259 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3260 		return FAIL;
3261 	    delete_var(ht, hi);
3262 	    return OK;
3263 	}
3264     }
3265     if (forceit)
3266 	return OK;
3267     EMSG2(_("E108: No such variable: \"%s\""), name);
3268     return FAIL;
3269 }
3270 
3271 /*
3272  * Lock or unlock variable indicated by "lp".
3273  * "deep" is the levels to go (-1 for unlimited);
3274  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3275  */
3276     static int
3277 do_lock_var(lp, name_end, deep, lock)
3278     lval_T	*lp;
3279     char_u	*name_end;
3280     int		deep;
3281     int		lock;
3282 {
3283     int		ret = OK;
3284     int		cc;
3285     dictitem_T	*di;
3286 
3287     if (deep == 0)	/* nothing to do */
3288 	return OK;
3289 
3290     if (lp->ll_tv == NULL)
3291     {
3292 	cc = *name_end;
3293 	*name_end = NUL;
3294 
3295 	/* Normal name or expanded name. */
3296 	if (check_changedtick(lp->ll_name))
3297 	    ret = FAIL;
3298 	else
3299 	{
3300 	    di = find_var(lp->ll_name, NULL);
3301 	    if (di == NULL)
3302 		ret = FAIL;
3303 	    else
3304 	    {
3305 		if (lock)
3306 		    di->di_flags |= DI_FLAGS_LOCK;
3307 		else
3308 		    di->di_flags &= ~DI_FLAGS_LOCK;
3309 		item_lock(&di->di_tv, deep, lock);
3310 	    }
3311 	}
3312 	*name_end = cc;
3313     }
3314     else if (lp->ll_range)
3315     {
3316 	listitem_T    *li = lp->ll_li;
3317 
3318 	/* (un)lock a range of List items. */
3319 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3320 	{
3321 	    item_lock(&li->li_tv, deep, lock);
3322 	    li = li->li_next;
3323 	    ++lp->ll_n1;
3324 	}
3325     }
3326     else if (lp->ll_list != NULL)
3327 	/* (un)lock a List item. */
3328 	item_lock(&lp->ll_li->li_tv, deep, lock);
3329     else
3330 	/* un(lock) a Dictionary item. */
3331 	item_lock(&lp->ll_di->di_tv, deep, lock);
3332 
3333     return ret;
3334 }
3335 
3336 /*
3337  * Lock or unlock an item.  "deep" is nr of levels to go.
3338  */
3339     static void
3340 item_lock(tv, deep, lock)
3341     typval_T	*tv;
3342     int		deep;
3343     int		lock;
3344 {
3345     static int	recurse = 0;
3346     list_T	*l;
3347     listitem_T	*li;
3348     dict_T	*d;
3349     hashitem_T	*hi;
3350     int		todo;
3351 
3352     if (recurse >= DICT_MAXNEST)
3353     {
3354 	EMSG(_("E743: variable nested too deep for (un)lock"));
3355 	return;
3356     }
3357     if (deep == 0)
3358 	return;
3359     ++recurse;
3360 
3361     /* lock/unlock the item itself */
3362     if (lock)
3363 	tv->v_lock |= VAR_LOCKED;
3364     else
3365 	tv->v_lock &= ~VAR_LOCKED;
3366 
3367     switch (tv->v_type)
3368     {
3369 	case VAR_LIST:
3370 	    if ((l = tv->vval.v_list) != NULL)
3371 	    {
3372 		if (lock)
3373 		    l->lv_lock |= VAR_LOCKED;
3374 		else
3375 		    l->lv_lock &= ~VAR_LOCKED;
3376 		if (deep < 0 || deep > 1)
3377 		    /* recursive: lock/unlock the items the List contains */
3378 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3379 			item_lock(&li->li_tv, deep - 1, lock);
3380 	    }
3381 	    break;
3382 	case VAR_DICT:
3383 	    if ((d = tv->vval.v_dict) != NULL)
3384 	    {
3385 		if (lock)
3386 		    d->dv_lock |= VAR_LOCKED;
3387 		else
3388 		    d->dv_lock &= ~VAR_LOCKED;
3389 		if (deep < 0 || deep > 1)
3390 		{
3391 		    /* recursive: lock/unlock the items the List contains */
3392 		    todo = d->dv_hashtab.ht_used;
3393 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3394 		    {
3395 			if (!HASHITEM_EMPTY(hi))
3396 			{
3397 			    --todo;
3398 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3399 			}
3400 		    }
3401 		}
3402 	    }
3403     }
3404     --recurse;
3405 }
3406 
3407 /*
3408  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3409  * it refers to a List or Dictionary that is locked.
3410  */
3411     static int
3412 tv_islocked(tv)
3413     typval_T	*tv;
3414 {
3415     return (tv->v_lock & VAR_LOCKED)
3416 	|| (tv->v_type == VAR_LIST
3417 		&& tv->vval.v_list != NULL
3418 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3419 	|| (tv->v_type == VAR_DICT
3420 		&& tv->vval.v_dict != NULL
3421 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3422 }
3423 
3424 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3425 /*
3426  * Delete all "menutrans_" variables.
3427  */
3428     void
3429 del_menutrans_vars()
3430 {
3431     hashitem_T	*hi;
3432     int		todo;
3433 
3434     hash_lock(&globvarht);
3435     todo = globvarht.ht_used;
3436     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3437     {
3438 	if (!HASHITEM_EMPTY(hi))
3439 	{
3440 	    --todo;
3441 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3442 		delete_var(&globvarht, hi);
3443 	}
3444     }
3445     hash_unlock(&globvarht);
3446 }
3447 #endif
3448 
3449 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3450 
3451 /*
3452  * Local string buffer for the next two functions to store a variable name
3453  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3454  * get_user_var_name().
3455  */
3456 
3457 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3458 
3459 static char_u	*varnamebuf = NULL;
3460 static int	varnamebuflen = 0;
3461 
3462 /*
3463  * Function to concatenate a prefix and a variable name.
3464  */
3465     static char_u *
3466 cat_prefix_varname(prefix, name)
3467     int		prefix;
3468     char_u	*name;
3469 {
3470     int		len;
3471 
3472     len = (int)STRLEN(name) + 3;
3473     if (len > varnamebuflen)
3474     {
3475 	vim_free(varnamebuf);
3476 	len += 10;			/* some additional space */
3477 	varnamebuf = alloc(len);
3478 	if (varnamebuf == NULL)
3479 	{
3480 	    varnamebuflen = 0;
3481 	    return NULL;
3482 	}
3483 	varnamebuflen = len;
3484     }
3485     *varnamebuf = prefix;
3486     varnamebuf[1] = ':';
3487     STRCPY(varnamebuf + 2, name);
3488     return varnamebuf;
3489 }
3490 
3491 /*
3492  * Function given to ExpandGeneric() to obtain the list of user defined
3493  * (global/buffer/window/built-in) variable names.
3494  */
3495 /*ARGSUSED*/
3496     char_u *
3497 get_user_var_name(xp, idx)
3498     expand_T	*xp;
3499     int		idx;
3500 {
3501     static long_u	gdone;
3502     static long_u	bdone;
3503     static long_u	wdone;
3504     static int		vidx;
3505     static hashitem_T	*hi;
3506     hashtab_T		*ht;
3507 
3508     if (idx == 0)
3509 	gdone = bdone = wdone = vidx = 0;
3510 
3511     /* Global variables */
3512     if (gdone < globvarht.ht_used)
3513     {
3514 	if (gdone++ == 0)
3515 	    hi = globvarht.ht_array;
3516 	else
3517 	    ++hi;
3518 	while (HASHITEM_EMPTY(hi))
3519 	    ++hi;
3520 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3521 	    return cat_prefix_varname('g', hi->hi_key);
3522 	return hi->hi_key;
3523     }
3524 
3525     /* b: variables */
3526     ht = &curbuf->b_vars.dv_hashtab;
3527     if (bdone < ht->ht_used)
3528     {
3529 	if (bdone++ == 0)
3530 	    hi = ht->ht_array;
3531 	else
3532 	    ++hi;
3533 	while (HASHITEM_EMPTY(hi))
3534 	    ++hi;
3535 	return cat_prefix_varname('b', hi->hi_key);
3536     }
3537     if (bdone == ht->ht_used)
3538     {
3539 	++bdone;
3540 	return (char_u *)"b:changedtick";
3541     }
3542 
3543     /* w: variables */
3544     ht = &curwin->w_vars.dv_hashtab;
3545     if (wdone < ht->ht_used)
3546     {
3547 	if (wdone++ == 0)
3548 	    hi = ht->ht_array;
3549 	else
3550 	    ++hi;
3551 	while (HASHITEM_EMPTY(hi))
3552 	    ++hi;
3553 	return cat_prefix_varname('w', hi->hi_key);
3554     }
3555 
3556     /* v: variables */
3557     if (vidx < VV_LEN)
3558 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3559 
3560     vim_free(varnamebuf);
3561     varnamebuf = NULL;
3562     varnamebuflen = 0;
3563     return NULL;
3564 }
3565 
3566 #endif /* FEAT_CMDL_COMPL */
3567 
3568 /*
3569  * types for expressions.
3570  */
3571 typedef enum
3572 {
3573     TYPE_UNKNOWN = 0
3574     , TYPE_EQUAL	/* == */
3575     , TYPE_NEQUAL	/* != */
3576     , TYPE_GREATER	/* >  */
3577     , TYPE_GEQUAL	/* >= */
3578     , TYPE_SMALLER	/* <  */
3579     , TYPE_SEQUAL	/* <= */
3580     , TYPE_MATCH	/* =~ */
3581     , TYPE_NOMATCH	/* !~ */
3582 } exptype_T;
3583 
3584 /*
3585  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3586  * executed.  The function may return OK, but the rettv will be of type
3587  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3588  */
3589 
3590 /*
3591  * Handle zero level expression.
3592  * This calls eval1() and handles error message and nextcmd.
3593  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3594  * Return OK or FAIL.
3595  */
3596     static int
3597 eval0(arg, rettv, nextcmd, evaluate)
3598     char_u	*arg;
3599     typval_T	*rettv;
3600     char_u	**nextcmd;
3601     int		evaluate;
3602 {
3603     int		ret;
3604     char_u	*p;
3605 
3606     p = skipwhite(arg);
3607     ret = eval1(&p, rettv, evaluate);
3608     if (ret == FAIL || !ends_excmd(*p))
3609     {
3610 	if (ret != FAIL)
3611 	    clear_tv(rettv);
3612 	/*
3613 	 * Report the invalid expression unless the expression evaluation has
3614 	 * been cancelled due to an aborting error, an interrupt, or an
3615 	 * exception.
3616 	 */
3617 	if (!aborting())
3618 	    EMSG2(_(e_invexpr2), arg);
3619 	ret = FAIL;
3620     }
3621     if (nextcmd != NULL)
3622 	*nextcmd = check_nextcmd(p);
3623 
3624     return ret;
3625 }
3626 
3627 /*
3628  * Handle top level expression:
3629  *	expr1 ? expr0 : expr0
3630  *
3631  * "arg" must point to the first non-white of the expression.
3632  * "arg" is advanced to the next non-white after the recognized expression.
3633  *
3634  * Return OK or FAIL.
3635  */
3636     static int
3637 eval1(arg, rettv, evaluate)
3638     char_u	**arg;
3639     typval_T	*rettv;
3640     int		evaluate;
3641 {
3642     int		result;
3643     typval_T	var2;
3644 
3645     /*
3646      * Get the first variable.
3647      */
3648     if (eval2(arg, rettv, evaluate) == FAIL)
3649 	return FAIL;
3650 
3651     if ((*arg)[0] == '?')
3652     {
3653 	result = FALSE;
3654 	if (evaluate)
3655 	{
3656 	    int		error = FALSE;
3657 
3658 	    if (get_tv_number_chk(rettv, &error) != 0)
3659 		result = TRUE;
3660 	    clear_tv(rettv);
3661 	    if (error)
3662 		return FAIL;
3663 	}
3664 
3665 	/*
3666 	 * Get the second variable.
3667 	 */
3668 	*arg = skipwhite(*arg + 1);
3669 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3670 	    return FAIL;
3671 
3672 	/*
3673 	 * Check for the ":".
3674 	 */
3675 	if ((*arg)[0] != ':')
3676 	{
3677 	    EMSG(_("E109: Missing ':' after '?'"));
3678 	    if (evaluate && result)
3679 		clear_tv(rettv);
3680 	    return FAIL;
3681 	}
3682 
3683 	/*
3684 	 * Get the third variable.
3685 	 */
3686 	*arg = skipwhite(*arg + 1);
3687 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3688 	{
3689 	    if (evaluate && result)
3690 		clear_tv(rettv);
3691 	    return FAIL;
3692 	}
3693 	if (evaluate && !result)
3694 	    *rettv = var2;
3695     }
3696 
3697     return OK;
3698 }
3699 
3700 /*
3701  * Handle first level expression:
3702  *	expr2 || expr2 || expr2	    logical OR
3703  *
3704  * "arg" must point to the first non-white of the expression.
3705  * "arg" is advanced to the next non-white after the recognized expression.
3706  *
3707  * Return OK or FAIL.
3708  */
3709     static int
3710 eval2(arg, rettv, evaluate)
3711     char_u	**arg;
3712     typval_T	*rettv;
3713     int		evaluate;
3714 {
3715     typval_T	var2;
3716     long	result;
3717     int		first;
3718     int		error = FALSE;
3719 
3720     /*
3721      * Get the first variable.
3722      */
3723     if (eval3(arg, rettv, evaluate) == FAIL)
3724 	return FAIL;
3725 
3726     /*
3727      * Repeat until there is no following "||".
3728      */
3729     first = TRUE;
3730     result = FALSE;
3731     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3732     {
3733 	if (evaluate && first)
3734 	{
3735 	    if (get_tv_number_chk(rettv, &error) != 0)
3736 		result = TRUE;
3737 	    clear_tv(rettv);
3738 	    if (error)
3739 		return FAIL;
3740 	    first = FALSE;
3741 	}
3742 
3743 	/*
3744 	 * Get the second variable.
3745 	 */
3746 	*arg = skipwhite(*arg + 2);
3747 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3748 	    return FAIL;
3749 
3750 	/*
3751 	 * Compute the result.
3752 	 */
3753 	if (evaluate && !result)
3754 	{
3755 	    if (get_tv_number_chk(&var2, &error) != 0)
3756 		result = TRUE;
3757 	    clear_tv(&var2);
3758 	    if (error)
3759 		return FAIL;
3760 	}
3761 	if (evaluate)
3762 	{
3763 	    rettv->v_type = VAR_NUMBER;
3764 	    rettv->vval.v_number = result;
3765 	}
3766     }
3767 
3768     return OK;
3769 }
3770 
3771 /*
3772  * Handle second level expression:
3773  *	expr3 && expr3 && expr3	    logical AND
3774  *
3775  * "arg" must point to the first non-white of the expression.
3776  * "arg" is advanced to the next non-white after the recognized expression.
3777  *
3778  * Return OK or FAIL.
3779  */
3780     static int
3781 eval3(arg, rettv, evaluate)
3782     char_u	**arg;
3783     typval_T	*rettv;
3784     int		evaluate;
3785 {
3786     typval_T	var2;
3787     long	result;
3788     int		first;
3789     int		error = FALSE;
3790 
3791     /*
3792      * Get the first variable.
3793      */
3794     if (eval4(arg, rettv, evaluate) == FAIL)
3795 	return FAIL;
3796 
3797     /*
3798      * Repeat until there is no following "&&".
3799      */
3800     first = TRUE;
3801     result = TRUE;
3802     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3803     {
3804 	if (evaluate && first)
3805 	{
3806 	    if (get_tv_number_chk(rettv, &error) == 0)
3807 		result = FALSE;
3808 	    clear_tv(rettv);
3809 	    if (error)
3810 		return FAIL;
3811 	    first = FALSE;
3812 	}
3813 
3814 	/*
3815 	 * Get the second variable.
3816 	 */
3817 	*arg = skipwhite(*arg + 2);
3818 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3819 	    return FAIL;
3820 
3821 	/*
3822 	 * Compute the result.
3823 	 */
3824 	if (evaluate && result)
3825 	{
3826 	    if (get_tv_number_chk(&var2, &error) == 0)
3827 		result = FALSE;
3828 	    clear_tv(&var2);
3829 	    if (error)
3830 		return FAIL;
3831 	}
3832 	if (evaluate)
3833 	{
3834 	    rettv->v_type = VAR_NUMBER;
3835 	    rettv->vval.v_number = result;
3836 	}
3837     }
3838 
3839     return OK;
3840 }
3841 
3842 /*
3843  * Handle third level expression:
3844  *	var1 == var2
3845  *	var1 =~ var2
3846  *	var1 != var2
3847  *	var1 !~ var2
3848  *	var1 > var2
3849  *	var1 >= var2
3850  *	var1 < var2
3851  *	var1 <= var2
3852  *	var1 is var2
3853  *	var1 isnot var2
3854  *
3855  * "arg" must point to the first non-white of the expression.
3856  * "arg" is advanced to the next non-white after the recognized expression.
3857  *
3858  * Return OK or FAIL.
3859  */
3860     static int
3861 eval4(arg, rettv, evaluate)
3862     char_u	**arg;
3863     typval_T	*rettv;
3864     int		evaluate;
3865 {
3866     typval_T	var2;
3867     char_u	*p;
3868     int		i;
3869     exptype_T	type = TYPE_UNKNOWN;
3870     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3871     int		len = 2;
3872     long	n1, n2;
3873     char_u	*s1, *s2;
3874     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3875     regmatch_T	regmatch;
3876     int		ic;
3877     char_u	*save_cpo;
3878 
3879     /*
3880      * Get the first variable.
3881      */
3882     if (eval5(arg, rettv, evaluate) == FAIL)
3883 	return FAIL;
3884 
3885     p = *arg;
3886     switch (p[0])
3887     {
3888 	case '=':   if (p[1] == '=')
3889 			type = TYPE_EQUAL;
3890 		    else if (p[1] == '~')
3891 			type = TYPE_MATCH;
3892 		    break;
3893 	case '!':   if (p[1] == '=')
3894 			type = TYPE_NEQUAL;
3895 		    else if (p[1] == '~')
3896 			type = TYPE_NOMATCH;
3897 		    break;
3898 	case '>':   if (p[1] != '=')
3899 		    {
3900 			type = TYPE_GREATER;
3901 			len = 1;
3902 		    }
3903 		    else
3904 			type = TYPE_GEQUAL;
3905 		    break;
3906 	case '<':   if (p[1] != '=')
3907 		    {
3908 			type = TYPE_SMALLER;
3909 			len = 1;
3910 		    }
3911 		    else
3912 			type = TYPE_SEQUAL;
3913 		    break;
3914 	case 'i':   if (p[1] == 's')
3915 		    {
3916 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3917 			    len = 5;
3918 			if (!vim_isIDc(p[len]))
3919 			{
3920 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3921 			    type_is = TRUE;
3922 			}
3923 		    }
3924 		    break;
3925     }
3926 
3927     /*
3928      * If there is a comparitive operator, use it.
3929      */
3930     if (type != TYPE_UNKNOWN)
3931     {
3932 	/* extra question mark appended: ignore case */
3933 	if (p[len] == '?')
3934 	{
3935 	    ic = TRUE;
3936 	    ++len;
3937 	}
3938 	/* extra '#' appended: match case */
3939 	else if (p[len] == '#')
3940 	{
3941 	    ic = FALSE;
3942 	    ++len;
3943 	}
3944 	/* nothing appened: use 'ignorecase' */
3945 	else
3946 	    ic = p_ic;
3947 
3948 	/*
3949 	 * Get the second variable.
3950 	 */
3951 	*arg = skipwhite(p + len);
3952 	if (eval5(arg, &var2, evaluate) == FAIL)
3953 	{
3954 	    clear_tv(rettv);
3955 	    return FAIL;
3956 	}
3957 
3958 	if (evaluate)
3959 	{
3960 	    if (type_is && rettv->v_type != var2.v_type)
3961 	    {
3962 		/* For "is" a different type always means FALSE, for "notis"
3963 		 * it means TRUE. */
3964 		n1 = (type == TYPE_NEQUAL);
3965 	    }
3966 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
3967 	    {
3968 		if (type_is)
3969 		{
3970 		    n1 = (rettv->v_type == var2.v_type
3971 				   && rettv->vval.v_list == var2.vval.v_list);
3972 		    if (type == TYPE_NEQUAL)
3973 			n1 = !n1;
3974 		}
3975 		else if (rettv->v_type != var2.v_type
3976 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3977 		{
3978 		    if (rettv->v_type != var2.v_type)
3979 			EMSG(_("E691: Can only compare List with List"));
3980 		    else
3981 			EMSG(_("E692: Invalid operation for Lists"));
3982 		    clear_tv(rettv);
3983 		    clear_tv(&var2);
3984 		    return FAIL;
3985 		}
3986 		else
3987 		{
3988 		    /* Compare two Lists for being equal or unequal. */
3989 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
3990 		    if (type == TYPE_NEQUAL)
3991 			n1 = !n1;
3992 		}
3993 	    }
3994 
3995 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
3996 	    {
3997 		if (type_is)
3998 		{
3999 		    n1 = (rettv->v_type == var2.v_type
4000 				   && rettv->vval.v_dict == var2.vval.v_dict);
4001 		    if (type == TYPE_NEQUAL)
4002 			n1 = !n1;
4003 		}
4004 		else if (rettv->v_type != var2.v_type
4005 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4006 		{
4007 		    if (rettv->v_type != var2.v_type)
4008 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4009 		    else
4010 			EMSG(_("E736: Invalid operation for Dictionary"));
4011 		    clear_tv(rettv);
4012 		    clear_tv(&var2);
4013 		    return FAIL;
4014 		}
4015 		else
4016 		{
4017 		    /* Compare two Dictionaries for being equal or unequal. */
4018 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4019 		    if (type == TYPE_NEQUAL)
4020 			n1 = !n1;
4021 		}
4022 	    }
4023 
4024 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4025 	    {
4026 		if (rettv->v_type != var2.v_type
4027 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4028 		{
4029 		    if (rettv->v_type != var2.v_type)
4030 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4031 		    else
4032 			EMSG(_("E694: Invalid operation for Funcrefs"));
4033 		    clear_tv(rettv);
4034 		    clear_tv(&var2);
4035 		    return FAIL;
4036 		}
4037 		else
4038 		{
4039 		    /* Compare two Funcrefs for being equal or unequal. */
4040 		    if (rettv->vval.v_string == NULL
4041 						|| var2.vval.v_string == NULL)
4042 			n1 = FALSE;
4043 		    else
4044 			n1 = STRCMP(rettv->vval.v_string,
4045 						     var2.vval.v_string) == 0;
4046 		    if (type == TYPE_NEQUAL)
4047 			n1 = !n1;
4048 		}
4049 	    }
4050 
4051 	    /*
4052 	     * If one of the two variables is a number, compare as a number.
4053 	     * When using "=~" or "!~", always compare as string.
4054 	     */
4055 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4056 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4057 	    {
4058 		n1 = get_tv_number(rettv);
4059 		n2 = get_tv_number(&var2);
4060 		switch (type)
4061 		{
4062 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4063 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4064 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4065 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4066 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4067 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4068 		    case TYPE_UNKNOWN:
4069 		    case TYPE_MATCH:
4070 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4071 		}
4072 	    }
4073 	    else
4074 	    {
4075 		s1 = get_tv_string_buf(rettv, buf1);
4076 		s2 = get_tv_string_buf(&var2, buf2);
4077 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4078 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4079 		else
4080 		    i = 0;
4081 		n1 = FALSE;
4082 		switch (type)
4083 		{
4084 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4085 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4086 		    case TYPE_GREATER:  n1 = (i > 0); break;
4087 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4088 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4089 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4090 
4091 		    case TYPE_MATCH:
4092 		    case TYPE_NOMATCH:
4093 			    /* avoid 'l' flag in 'cpoptions' */
4094 			    save_cpo = p_cpo;
4095 			    p_cpo = (char_u *)"";
4096 			    regmatch.regprog = vim_regcomp(s2,
4097 							RE_MAGIC + RE_STRING);
4098 			    regmatch.rm_ic = ic;
4099 			    if (regmatch.regprog != NULL)
4100 			    {
4101 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4102 				vim_free(regmatch.regprog);
4103 				if (type == TYPE_NOMATCH)
4104 				    n1 = !n1;
4105 			    }
4106 			    p_cpo = save_cpo;
4107 			    break;
4108 
4109 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4110 		}
4111 	    }
4112 	    clear_tv(rettv);
4113 	    clear_tv(&var2);
4114 	    rettv->v_type = VAR_NUMBER;
4115 	    rettv->vval.v_number = n1;
4116 	}
4117     }
4118 
4119     return OK;
4120 }
4121 
4122 /*
4123  * Handle fourth level expression:
4124  *	+	number addition
4125  *	-	number subtraction
4126  *	.	string concatenation
4127  *
4128  * "arg" must point to the first non-white of the expression.
4129  * "arg" is advanced to the next non-white after the recognized expression.
4130  *
4131  * Return OK or FAIL.
4132  */
4133     static int
4134 eval5(arg, rettv, evaluate)
4135     char_u	**arg;
4136     typval_T	*rettv;
4137     int		evaluate;
4138 {
4139     typval_T	var2;
4140     typval_T	var3;
4141     int		op;
4142     long	n1, n2;
4143     char_u	*s1, *s2;
4144     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4145     char_u	*p;
4146 
4147     /*
4148      * Get the first variable.
4149      */
4150     if (eval6(arg, rettv, evaluate) == FAIL)
4151 	return FAIL;
4152 
4153     /*
4154      * Repeat computing, until no '+', '-' or '.' is following.
4155      */
4156     for (;;)
4157     {
4158 	op = **arg;
4159 	if (op != '+' && op != '-' && op != '.')
4160 	    break;
4161 
4162 	if (op != '+' || rettv->v_type != VAR_LIST)
4163 	{
4164 	    /* For "list + ...", an illegal use of the first operand as
4165 	     * a number cannot be determined before evaluating the 2nd
4166 	     * operand: if this is also a list, all is ok.
4167 	     * For "something . ...", "something - ..." or "non-list + ...",
4168 	     * we know that the first operand needs to be a string or number
4169 	     * without evaluating the 2nd operand.  So check before to avoid
4170 	     * side effects after an error. */
4171 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4172 	    {
4173 		clear_tv(rettv);
4174 		return FAIL;
4175 	    }
4176 	}
4177 
4178 	/*
4179 	 * Get the second variable.
4180 	 */
4181 	*arg = skipwhite(*arg + 1);
4182 	if (eval6(arg, &var2, evaluate) == FAIL)
4183 	{
4184 	    clear_tv(rettv);
4185 	    return FAIL;
4186 	}
4187 
4188 	if (evaluate)
4189 	{
4190 	    /*
4191 	     * Compute the result.
4192 	     */
4193 	    if (op == '.')
4194 	    {
4195 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4196 		s2 = get_tv_string_buf_chk(&var2, buf2);
4197 		if (s2 == NULL)		/* type error ? */
4198 		{
4199 		    clear_tv(rettv);
4200 		    clear_tv(&var2);
4201 		    return FAIL;
4202 		}
4203 		p = concat_str(s1, s2);
4204 		clear_tv(rettv);
4205 		rettv->v_type = VAR_STRING;
4206 		rettv->vval.v_string = p;
4207 	    }
4208 	    else if (op == '+' && rettv->v_type == VAR_LIST
4209 						   && var2.v_type == VAR_LIST)
4210 	    {
4211 		/* concatenate Lists */
4212 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4213 							       &var3) == FAIL)
4214 		{
4215 		    clear_tv(rettv);
4216 		    clear_tv(&var2);
4217 		    return FAIL;
4218 		}
4219 		clear_tv(rettv);
4220 		*rettv = var3;
4221 	    }
4222 	    else
4223 	    {
4224 		int	    error = FALSE;
4225 
4226 		n1 = get_tv_number_chk(rettv, &error);
4227 		if (error)
4228 		{
4229 		    /* This can only happen for "list + non-list".
4230 		     * For "non-list + ..." or "something - ...", we returned
4231 		     * before evaluating the 2nd operand. */
4232 		    clear_tv(rettv);
4233 		    return FAIL;
4234 		}
4235 		n2 = get_tv_number_chk(&var2, &error);
4236 		if (error)
4237 		{
4238 		    clear_tv(rettv);
4239 		    clear_tv(&var2);
4240 		    return FAIL;
4241 		}
4242 		clear_tv(rettv);
4243 		if (op == '+')
4244 		    n1 = n1 + n2;
4245 		else
4246 		    n1 = n1 - n2;
4247 		rettv->v_type = VAR_NUMBER;
4248 		rettv->vval.v_number = n1;
4249 	    }
4250 	    clear_tv(&var2);
4251 	}
4252     }
4253     return OK;
4254 }
4255 
4256 /*
4257  * Handle fifth level expression:
4258  *	*	number multiplication
4259  *	/	number division
4260  *	%	number modulo
4261  *
4262  * "arg" must point to the first non-white of the expression.
4263  * "arg" is advanced to the next non-white after the recognized expression.
4264  *
4265  * Return OK or FAIL.
4266  */
4267     static int
4268 eval6(arg, rettv, evaluate)
4269     char_u	**arg;
4270     typval_T	*rettv;
4271     int		evaluate;
4272 {
4273     typval_T	var2;
4274     int		op;
4275     long	n1, n2;
4276     int		error = FALSE;
4277 
4278     /*
4279      * Get the first variable.
4280      */
4281     if (eval7(arg, rettv, evaluate) == FAIL)
4282 	return FAIL;
4283 
4284     /*
4285      * Repeat computing, until no '*', '/' or '%' is following.
4286      */
4287     for (;;)
4288     {
4289 	op = **arg;
4290 	if (op != '*' && op != '/' && op != '%')
4291 	    break;
4292 
4293 	if (evaluate)
4294 	{
4295 	    n1 = get_tv_number_chk(rettv, &error);
4296 	    clear_tv(rettv);
4297 	    if (error)
4298 		return FAIL;
4299 	}
4300 	else
4301 	    n1 = 0;
4302 
4303 	/*
4304 	 * Get the second variable.
4305 	 */
4306 	*arg = skipwhite(*arg + 1);
4307 	if (eval7(arg, &var2, evaluate) == FAIL)
4308 	    return FAIL;
4309 
4310 	if (evaluate)
4311 	{
4312 	    n2 = get_tv_number_chk(&var2, &error);
4313 	    clear_tv(&var2);
4314 	    if (error)
4315 		return FAIL;
4316 
4317 	    /*
4318 	     * Compute the result.
4319 	     */
4320 	    if (op == '*')
4321 		n1 = n1 * n2;
4322 	    else if (op == '/')
4323 	    {
4324 		if (n2 == 0)	/* give an error message? */
4325 		    n1 = 0x7fffffffL;
4326 		else
4327 		    n1 = n1 / n2;
4328 	    }
4329 	    else
4330 	    {
4331 		if (n2 == 0)	/* give an error message? */
4332 		    n1 = 0;
4333 		else
4334 		    n1 = n1 % n2;
4335 	    }
4336 	    rettv->v_type = VAR_NUMBER;
4337 	    rettv->vval.v_number = n1;
4338 	}
4339     }
4340 
4341     return OK;
4342 }
4343 
4344 /*
4345  * Handle sixth level expression:
4346  *  number		number constant
4347  *  "string"		string contstant
4348  *  'string'		literal string contstant
4349  *  &option-name	option value
4350  *  @r			register contents
4351  *  identifier		variable value
4352  *  function()		function call
4353  *  $VAR		environment variable
4354  *  (expression)	nested expression
4355  *  [expr, expr]	List
4356  *  {key: val, key: val}  Dictionary
4357  *
4358  *  Also handle:
4359  *  ! in front		logical NOT
4360  *  - in front		unary minus
4361  *  + in front		unary plus (ignored)
4362  *  trailing []		subscript in String or List
4363  *  trailing .name	entry in Dictionary
4364  *
4365  * "arg" must point to the first non-white of the expression.
4366  * "arg" is advanced to the next non-white after the recognized expression.
4367  *
4368  * Return OK or FAIL.
4369  */
4370     static int
4371 eval7(arg, rettv, evaluate)
4372     char_u	**arg;
4373     typval_T	*rettv;
4374     int		evaluate;
4375 {
4376     long	n;
4377     int		len;
4378     char_u	*s;
4379     int		val;
4380     char_u	*start_leader, *end_leader;
4381     int		ret = OK;
4382     char_u	*alias;
4383 
4384     /*
4385      * Initialise variable so that clear_tv() can't mistake this for a
4386      * string and free a string that isn't there.
4387      */
4388     rettv->v_type = VAR_UNKNOWN;
4389 
4390     /*
4391      * Skip '!' and '-' characters.  They are handled later.
4392      */
4393     start_leader = *arg;
4394     while (**arg == '!' || **arg == '-' || **arg == '+')
4395 	*arg = skipwhite(*arg + 1);
4396     end_leader = *arg;
4397 
4398     switch (**arg)
4399     {
4400     /*
4401      * Number constant.
4402      */
4403     case '0':
4404     case '1':
4405     case '2':
4406     case '3':
4407     case '4':
4408     case '5':
4409     case '6':
4410     case '7':
4411     case '8':
4412     case '9':
4413 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4414 		*arg += len;
4415 		if (evaluate)
4416 		{
4417 		    rettv->v_type = VAR_NUMBER;
4418 		    rettv->vval.v_number = n;
4419 		}
4420 		break;
4421 
4422     /*
4423      * String constant: "string".
4424      */
4425     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4426 		break;
4427 
4428     /*
4429      * Literal string constant: 'str''ing'.
4430      */
4431     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4432 		break;
4433 
4434     /*
4435      * List: [expr, expr]
4436      */
4437     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4438 		break;
4439 
4440     /*
4441      * Dictionary: {key: val, key: val}
4442      */
4443     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4444 		break;
4445 
4446     /*
4447      * Option value: &name
4448      */
4449     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4450 		break;
4451 
4452     /*
4453      * Environment variable: $VAR.
4454      */
4455     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4456 		break;
4457 
4458     /*
4459      * Register contents: @r.
4460      */
4461     case '@':	++*arg;
4462 		if (evaluate)
4463 		{
4464 		    rettv->v_type = VAR_STRING;
4465 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4466 		}
4467 		if (**arg != NUL)
4468 		    ++*arg;
4469 		break;
4470 
4471     /*
4472      * nested expression: (expression).
4473      */
4474     case '(':	*arg = skipwhite(*arg + 1);
4475 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4476 		if (**arg == ')')
4477 		    ++*arg;
4478 		else if (ret == OK)
4479 		{
4480 		    EMSG(_("E110: Missing ')'"));
4481 		    clear_tv(rettv);
4482 		    ret = FAIL;
4483 		}
4484 		break;
4485 
4486     default:	ret = NOTDONE;
4487 		break;
4488     }
4489 
4490     if (ret == NOTDONE)
4491     {
4492 	/*
4493 	 * Must be a variable or function name.
4494 	 * Can also be a curly-braces kind of name: {expr}.
4495 	 */
4496 	s = *arg;
4497 	len = get_name_len(arg, &alias, evaluate, TRUE);
4498 	if (alias != NULL)
4499 	    s = alias;
4500 
4501 	if (len <= 0)
4502 	    ret = FAIL;
4503 	else
4504 	{
4505 	    if (**arg == '(')		/* recursive! */
4506 	    {
4507 		/* If "s" is the name of a variable of type VAR_FUNC
4508 		 * use its contents. */
4509 		s = deref_func_name(s, &len);
4510 
4511 		/* Invoke the function. */
4512 		ret = get_func_tv(s, len, rettv, arg,
4513 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4514 			  &len, evaluate, NULL);
4515 		/* Stop the expression evaluation when immediately
4516 		 * aborting on error, or when an interrupt occurred or
4517 		 * an exception was thrown but not caught. */
4518 		if (aborting())
4519 		{
4520 		    if (ret == OK)
4521 			clear_tv(rettv);
4522 		    ret = FAIL;
4523 		}
4524 	    }
4525 	    else if (evaluate)
4526 		ret = get_var_tv(s, len, rettv, TRUE);
4527 	    else
4528 		ret = OK;
4529 	}
4530 
4531 	if (alias != NULL)
4532 	    vim_free(alias);
4533     }
4534 
4535     *arg = skipwhite(*arg);
4536 
4537     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4538      * expr(expr). */
4539     if (ret == OK)
4540 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4541 
4542     /*
4543      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4544      */
4545     if (ret == OK && evaluate && end_leader > start_leader)
4546     {
4547 	int	    error = FALSE;
4548 
4549 	val = get_tv_number_chk(rettv, &error);
4550 	if (error)
4551 	{
4552 	    clear_tv(rettv);
4553 	    ret = FAIL;
4554 	}
4555 	else
4556 	{
4557 	    while (end_leader > start_leader)
4558 	    {
4559 		--end_leader;
4560 		if (*end_leader == '!')
4561 		    val = !val;
4562 		else if (*end_leader == '-')
4563 		    val = -val;
4564 	    }
4565 	    clear_tv(rettv);
4566 	    rettv->v_type = VAR_NUMBER;
4567 	    rettv->vval.v_number = val;
4568 	}
4569     }
4570 
4571     return ret;
4572 }
4573 
4574 /*
4575  * Evaluate an "[expr]" or "[expr:expr]" index.
4576  * "*arg" points to the '['.
4577  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4578  */
4579     static int
4580 eval_index(arg, rettv, evaluate, verbose)
4581     char_u	**arg;
4582     typval_T	*rettv;
4583     int		evaluate;
4584     int		verbose;	/* give error messages */
4585 {
4586     int		empty1 = FALSE, empty2 = FALSE;
4587     typval_T	var1, var2;
4588     long	n1, n2 = 0;
4589     long	len = -1;
4590     int		range = FALSE;
4591     char_u	*s;
4592     char_u	*key = NULL;
4593 
4594     if (rettv->v_type == VAR_FUNC)
4595     {
4596 	if (verbose)
4597 	    EMSG(_("E695: Cannot index a Funcref"));
4598 	return FAIL;
4599     }
4600 
4601     if (**arg == '.')
4602     {
4603 	/*
4604 	 * dict.name
4605 	 */
4606 	key = *arg + 1;
4607 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4608 	    ;
4609 	if (len == 0)
4610 	    return FAIL;
4611 	*arg = skipwhite(key + len);
4612     }
4613     else
4614     {
4615 	/*
4616 	 * something[idx]
4617 	 *
4618 	 * Get the (first) variable from inside the [].
4619 	 */
4620 	*arg = skipwhite(*arg + 1);
4621 	if (**arg == ':')
4622 	    empty1 = TRUE;
4623 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4624 	    return FAIL;
4625 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4626 	{
4627 	    /* not a number or string */
4628 	    clear_tv(&var1);
4629 	    return FAIL;
4630 	}
4631 
4632 	/*
4633 	 * Get the second variable from inside the [:].
4634 	 */
4635 	if (**arg == ':')
4636 	{
4637 	    range = TRUE;
4638 	    *arg = skipwhite(*arg + 1);
4639 	    if (**arg == ']')
4640 		empty2 = TRUE;
4641 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4642 	    {
4643 		if (!empty1)
4644 		    clear_tv(&var1);
4645 		return FAIL;
4646 	    }
4647 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4648 	    {
4649 		/* not a number or string */
4650 		if (!empty1)
4651 		    clear_tv(&var1);
4652 		clear_tv(&var2);
4653 		return FAIL;
4654 	    }
4655 	}
4656 
4657 	/* Check for the ']'. */
4658 	if (**arg != ']')
4659 	{
4660 	    if (verbose)
4661 		EMSG(_(e_missbrac));
4662 	    clear_tv(&var1);
4663 	    if (range)
4664 		clear_tv(&var2);
4665 	    return FAIL;
4666 	}
4667 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4668     }
4669 
4670     if (evaluate)
4671     {
4672 	n1 = 0;
4673 	if (!empty1 && rettv->v_type != VAR_DICT)
4674 	{
4675 	    n1 = get_tv_number(&var1);
4676 	    clear_tv(&var1);
4677 	}
4678 	if (range)
4679 	{
4680 	    if (empty2)
4681 		n2 = -1;
4682 	    else
4683 	    {
4684 		n2 = get_tv_number(&var2);
4685 		clear_tv(&var2);
4686 	    }
4687 	}
4688 
4689 	switch (rettv->v_type)
4690 	{
4691 	    case VAR_NUMBER:
4692 	    case VAR_STRING:
4693 		s = get_tv_string(rettv);
4694 		len = (long)STRLEN(s);
4695 		if (range)
4696 		{
4697 		    /* The resulting variable is a substring.  If the indexes
4698 		     * are out of range the result is empty. */
4699 		    if (n1 < 0)
4700 		    {
4701 			n1 = len + n1;
4702 			if (n1 < 0)
4703 			    n1 = 0;
4704 		    }
4705 		    if (n2 < 0)
4706 			n2 = len + n2;
4707 		    else if (n2 >= len)
4708 			n2 = len;
4709 		    if (n1 >= len || n2 < 0 || n1 > n2)
4710 			s = NULL;
4711 		    else
4712 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4713 		}
4714 		else
4715 		{
4716 		    /* The resulting variable is a string of a single
4717 		     * character.  If the index is too big or negative the
4718 		     * result is empty. */
4719 		    if (n1 >= len || n1 < 0)
4720 			s = NULL;
4721 		    else
4722 			s = vim_strnsave(s + n1, 1);
4723 		}
4724 		clear_tv(rettv);
4725 		rettv->v_type = VAR_STRING;
4726 		rettv->vval.v_string = s;
4727 		break;
4728 
4729 	    case VAR_LIST:
4730 		len = list_len(rettv->vval.v_list);
4731 		if (n1 < 0)
4732 		    n1 = len + n1;
4733 		if (!empty1 && (n1 < 0 || n1 >= len))
4734 		{
4735 		    if (verbose)
4736 			EMSGN(_(e_listidx), n1);
4737 		    return FAIL;
4738 		}
4739 		if (range)
4740 		{
4741 		    list_T	*l;
4742 		    listitem_T	*item;
4743 
4744 		    if (n2 < 0)
4745 			n2 = len + n2;
4746 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4747 		    {
4748 			if (verbose)
4749 			    EMSGN(_(e_listidx), n2);
4750 			return FAIL;
4751 		    }
4752 		    l = list_alloc();
4753 		    if (l == NULL)
4754 			return FAIL;
4755 		    for (item = list_find(rettv->vval.v_list, n1);
4756 							       n1 <= n2; ++n1)
4757 		    {
4758 			if (list_append_tv(l, &item->li_tv) == FAIL)
4759 			{
4760 			    list_free(l);
4761 			    return FAIL;
4762 			}
4763 			item = item->li_next;
4764 		    }
4765 		    clear_tv(rettv);
4766 		    rettv->v_type = VAR_LIST;
4767 		    rettv->vval.v_list = l;
4768 		    ++l->lv_refcount;
4769 		}
4770 		else
4771 		{
4772 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4773 								       &var1);
4774 		    clear_tv(rettv);
4775 		    *rettv = var1;
4776 		}
4777 		break;
4778 
4779 	    case VAR_DICT:
4780 		if (range)
4781 		{
4782 		    if (verbose)
4783 			EMSG(_(e_dictrange));
4784 		    if (len == -1)
4785 			clear_tv(&var1);
4786 		    return FAIL;
4787 		}
4788 		{
4789 		    dictitem_T	*item;
4790 
4791 		    if (len == -1)
4792 		    {
4793 			key = get_tv_string(&var1);
4794 			if (*key == NUL)
4795 			{
4796 			    if (verbose)
4797 				EMSG(_(e_emptykey));
4798 			    clear_tv(&var1);
4799 			    return FAIL;
4800 			}
4801 		    }
4802 
4803 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4804 
4805 		    if (item == NULL && verbose)
4806 			EMSG2(_(e_dictkey), key);
4807 		    if (len == -1)
4808 			clear_tv(&var1);
4809 		    if (item == NULL)
4810 			return FAIL;
4811 
4812 		    copy_tv(&item->di_tv, &var1);
4813 		    clear_tv(rettv);
4814 		    *rettv = var1;
4815 		}
4816 		break;
4817 	}
4818     }
4819 
4820     return OK;
4821 }
4822 
4823 /*
4824  * Get an option value.
4825  * "arg" points to the '&' or '+' before the option name.
4826  * "arg" is advanced to character after the option name.
4827  * Return OK or FAIL.
4828  */
4829     static int
4830 get_option_tv(arg, rettv, evaluate)
4831     char_u	**arg;
4832     typval_T	*rettv;	/* when NULL, only check if option exists */
4833     int		evaluate;
4834 {
4835     char_u	*option_end;
4836     long	numval;
4837     char_u	*stringval;
4838     int		opt_type;
4839     int		c;
4840     int		working = (**arg == '+');    /* has("+option") */
4841     int		ret = OK;
4842     int		opt_flags;
4843 
4844     /*
4845      * Isolate the option name and find its value.
4846      */
4847     option_end = find_option_end(arg, &opt_flags);
4848     if (option_end == NULL)
4849     {
4850 	if (rettv != NULL)
4851 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4852 	return FAIL;
4853     }
4854 
4855     if (!evaluate)
4856     {
4857 	*arg = option_end;
4858 	return OK;
4859     }
4860 
4861     c = *option_end;
4862     *option_end = NUL;
4863     opt_type = get_option_value(*arg, &numval,
4864 			       rettv == NULL ? NULL : &stringval, opt_flags);
4865 
4866     if (opt_type == -3)			/* invalid name */
4867     {
4868 	if (rettv != NULL)
4869 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4870 	ret = FAIL;
4871     }
4872     else if (rettv != NULL)
4873     {
4874 	if (opt_type == -2)		/* hidden string option */
4875 	{
4876 	    rettv->v_type = VAR_STRING;
4877 	    rettv->vval.v_string = NULL;
4878 	}
4879 	else if (opt_type == -1)	/* hidden number option */
4880 	{
4881 	    rettv->v_type = VAR_NUMBER;
4882 	    rettv->vval.v_number = 0;
4883 	}
4884 	else if (opt_type == 1)		/* number option */
4885 	{
4886 	    rettv->v_type = VAR_NUMBER;
4887 	    rettv->vval.v_number = numval;
4888 	}
4889 	else				/* string option */
4890 	{
4891 	    rettv->v_type = VAR_STRING;
4892 	    rettv->vval.v_string = stringval;
4893 	}
4894     }
4895     else if (working && (opt_type == -2 || opt_type == -1))
4896 	ret = FAIL;
4897 
4898     *option_end = c;		    /* put back for error messages */
4899     *arg = option_end;
4900 
4901     return ret;
4902 }
4903 
4904 /*
4905  * Allocate a variable for a string constant.
4906  * Return OK or FAIL.
4907  */
4908     static int
4909 get_string_tv(arg, rettv, evaluate)
4910     char_u	**arg;
4911     typval_T	*rettv;
4912     int		evaluate;
4913 {
4914     char_u	*p;
4915     char_u	*name;
4916     int		extra = 0;
4917 
4918     /*
4919      * Find the end of the string, skipping backslashed characters.
4920      */
4921     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4922     {
4923 	if (*p == '\\' && p[1] != NUL)
4924 	{
4925 	    ++p;
4926 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4927 	     * to 6 characters: reserve space for 2 extra */
4928 	    if (*p == '<')
4929 		extra += 2;
4930 	}
4931     }
4932 
4933     if (*p != '"')
4934     {
4935 	EMSG2(_("E114: Missing quote: %s"), *arg);
4936 	return FAIL;
4937     }
4938 
4939     /* If only parsing, set *arg and return here */
4940     if (!evaluate)
4941     {
4942 	*arg = p + 1;
4943 	return OK;
4944     }
4945 
4946     /*
4947      * Copy the string into allocated memory, handling backslashed
4948      * characters.
4949      */
4950     name = alloc((unsigned)(p - *arg + extra));
4951     if (name == NULL)
4952 	return FAIL;
4953     rettv->v_type = VAR_STRING;
4954     rettv->vval.v_string = name;
4955 
4956     for (p = *arg + 1; *p != NUL && *p != '"'; )
4957     {
4958 	if (*p == '\\')
4959 	{
4960 	    switch (*++p)
4961 	    {
4962 		case 'b': *name++ = BS; ++p; break;
4963 		case 'e': *name++ = ESC; ++p; break;
4964 		case 'f': *name++ = FF; ++p; break;
4965 		case 'n': *name++ = NL; ++p; break;
4966 		case 'r': *name++ = CAR; ++p; break;
4967 		case 't': *name++ = TAB; ++p; break;
4968 
4969 		case 'X': /* hex: "\x1", "\x12" */
4970 		case 'x':
4971 		case 'u': /* Unicode: "\u0023" */
4972 		case 'U':
4973 			  if (vim_isxdigit(p[1]))
4974 			  {
4975 			      int	n, nr;
4976 			      int	c = toupper(*p);
4977 
4978 			      if (c == 'X')
4979 				  n = 2;
4980 			      else
4981 				  n = 4;
4982 			      nr = 0;
4983 			      while (--n >= 0 && vim_isxdigit(p[1]))
4984 			      {
4985 				  ++p;
4986 				  nr = (nr << 4) + hex2nr(*p);
4987 			      }
4988 			      ++p;
4989 #ifdef FEAT_MBYTE
4990 			      /* For "\u" store the number according to
4991 			       * 'encoding'. */
4992 			      if (c != 'X')
4993 				  name += (*mb_char2bytes)(nr, name);
4994 			      else
4995 #endif
4996 				  *name++ = nr;
4997 			  }
4998 			  break;
4999 
5000 			  /* octal: "\1", "\12", "\123" */
5001 		case '0':
5002 		case '1':
5003 		case '2':
5004 		case '3':
5005 		case '4':
5006 		case '5':
5007 		case '6':
5008 		case '7': *name = *p++ - '0';
5009 			  if (*p >= '0' && *p <= '7')
5010 			  {
5011 			      *name = (*name << 3) + *p++ - '0';
5012 			      if (*p >= '0' && *p <= '7')
5013 				  *name = (*name << 3) + *p++ - '0';
5014 			  }
5015 			  ++name;
5016 			  break;
5017 
5018 			    /* Special key, e.g.: "\<C-W>" */
5019 		case '<': extra = trans_special(&p, name, TRUE);
5020 			  if (extra != 0)
5021 			  {
5022 			      name += extra;
5023 			      break;
5024 			  }
5025 			  /* FALLTHROUGH */
5026 
5027 		default:  MB_COPY_CHAR(p, name);
5028 			  break;
5029 	    }
5030 	}
5031 	else
5032 	    MB_COPY_CHAR(p, name);
5033 
5034     }
5035     *name = NUL;
5036     *arg = p + 1;
5037 
5038     return OK;
5039 }
5040 
5041 /*
5042  * Allocate a variable for a 'str''ing' constant.
5043  * Return OK or FAIL.
5044  */
5045     static int
5046 get_lit_string_tv(arg, rettv, evaluate)
5047     char_u	**arg;
5048     typval_T	*rettv;
5049     int		evaluate;
5050 {
5051     char_u	*p;
5052     char_u	*str;
5053     int		reduce = 0;
5054 
5055     /*
5056      * Find the end of the string, skipping ''.
5057      */
5058     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5059     {
5060 	if (*p == '\'')
5061 	{
5062 	    if (p[1] != '\'')
5063 		break;
5064 	    ++reduce;
5065 	    ++p;
5066 	}
5067     }
5068 
5069     if (*p != '\'')
5070     {
5071 	EMSG2(_("E115: Missing quote: %s"), *arg);
5072 	return FAIL;
5073     }
5074 
5075     /* If only parsing return after setting "*arg" */
5076     if (!evaluate)
5077     {
5078 	*arg = p + 1;
5079 	return OK;
5080     }
5081 
5082     /*
5083      * Copy the string into allocated memory, handling '' to ' reduction.
5084      */
5085     str = alloc((unsigned)((p - *arg) - reduce));
5086     if (str == NULL)
5087 	return FAIL;
5088     rettv->v_type = VAR_STRING;
5089     rettv->vval.v_string = str;
5090 
5091     for (p = *arg + 1; *p != NUL; )
5092     {
5093 	if (*p == '\'')
5094 	{
5095 	    if (p[1] != '\'')
5096 		break;
5097 	    ++p;
5098 	}
5099 	MB_COPY_CHAR(p, str);
5100     }
5101     *str = NUL;
5102     *arg = p + 1;
5103 
5104     return OK;
5105 }
5106 
5107 /*
5108  * Allocate a variable for a List and fill it from "*arg".
5109  * Return OK or FAIL.
5110  */
5111     static int
5112 get_list_tv(arg, rettv, evaluate)
5113     char_u	**arg;
5114     typval_T	*rettv;
5115     int		evaluate;
5116 {
5117     list_T	*l = NULL;
5118     typval_T	tv;
5119     listitem_T	*item;
5120 
5121     if (evaluate)
5122     {
5123 	l = list_alloc();
5124 	if (l == NULL)
5125 	    return FAIL;
5126     }
5127 
5128     *arg = skipwhite(*arg + 1);
5129     while (**arg != ']' && **arg != NUL)
5130     {
5131 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5132 	    goto failret;
5133 	if (evaluate)
5134 	{
5135 	    item = listitem_alloc();
5136 	    if (item != NULL)
5137 	    {
5138 		item->li_tv = tv;
5139 		item->li_tv.v_lock = 0;
5140 		list_append(l, item);
5141 	    }
5142 	    else
5143 		clear_tv(&tv);
5144 	}
5145 
5146 	if (**arg == ']')
5147 	    break;
5148 	if (**arg != ',')
5149 	{
5150 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5151 	    goto failret;
5152 	}
5153 	*arg = skipwhite(*arg + 1);
5154     }
5155 
5156     if (**arg != ']')
5157     {
5158 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5159 failret:
5160 	if (evaluate)
5161 	    list_free(l);
5162 	return FAIL;
5163     }
5164 
5165     *arg = skipwhite(*arg + 1);
5166     if (evaluate)
5167     {
5168 	rettv->v_type = VAR_LIST;
5169 	rettv->vval.v_list = l;
5170 	++l->lv_refcount;
5171     }
5172 
5173     return OK;
5174 }
5175 
5176 /*
5177  * Allocate an empty header for a list.
5178  */
5179     static list_T *
5180 list_alloc()
5181 {
5182     list_T  *l;
5183 
5184     l = (list_T *)alloc_clear(sizeof(list_T));
5185     if (l != NULL)
5186     {
5187 	/* Prepend the list to the list of lists for garbage collection. */
5188 	if (first_list != NULL)
5189 	    first_list->lv_used_prev = l;
5190 	l->lv_used_prev = NULL;
5191 	l->lv_used_next = first_list;
5192 	first_list = l;
5193     }
5194     return l;
5195 }
5196 
5197 /*
5198  * Unreference a list: decrement the reference count and free it when it
5199  * becomes zero.
5200  */
5201     void
5202 list_unref(l)
5203     list_T *l;
5204 {
5205     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5206 	list_free(l);
5207 }
5208 
5209 /*
5210  * Free a list, including all items it points to.
5211  * Ignores the reference count.
5212  */
5213     static void
5214 list_free(l)
5215     list_T *l;
5216 {
5217     listitem_T *item;
5218 
5219     /* Avoid that recursive reference to the list frees us again. */
5220     l->lv_refcount = DEL_REFCOUNT;
5221 
5222     /* Remove the list from the list of lists for garbage collection. */
5223     if (l->lv_used_prev == NULL)
5224 	first_list = l->lv_used_next;
5225     else
5226 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5227     if (l->lv_used_next != NULL)
5228 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5229 
5230     for (item = l->lv_first; item != NULL; item = l->lv_first)
5231     {
5232 	/* Remove the item before deleting it. */
5233 	l->lv_first = item->li_next;
5234 	listitem_free(item);
5235     }
5236     vim_free(l);
5237 }
5238 
5239 /*
5240  * Allocate a list item.
5241  */
5242     static listitem_T *
5243 listitem_alloc()
5244 {
5245     return (listitem_T *)alloc(sizeof(listitem_T));
5246 }
5247 
5248 /*
5249  * Free a list item.  Also clears the value.  Does not notify watchers.
5250  */
5251     static void
5252 listitem_free(item)
5253     listitem_T *item;
5254 {
5255     clear_tv(&item->li_tv);
5256     vim_free(item);
5257 }
5258 
5259 /*
5260  * Remove a list item from a List and free it.  Also clears the value.
5261  */
5262     static void
5263 listitem_remove(l, item)
5264     list_T  *l;
5265     listitem_T *item;
5266 {
5267     list_remove(l, item, item);
5268     listitem_free(item);
5269 }
5270 
5271 /*
5272  * Get the number of items in a list.
5273  */
5274     static long
5275 list_len(l)
5276     list_T	*l;
5277 {
5278     if (l == NULL)
5279 	return 0L;
5280     return l->lv_len;
5281 }
5282 
5283 /*
5284  * Return TRUE when two lists have exactly the same values.
5285  */
5286     static int
5287 list_equal(l1, l2, ic)
5288     list_T	*l1;
5289     list_T	*l2;
5290     int		ic;	/* ignore case for strings */
5291 {
5292     listitem_T	*item1, *item2;
5293 
5294     if (list_len(l1) != list_len(l2))
5295 	return FALSE;
5296 
5297     for (item1 = l1->lv_first, item2 = l2->lv_first;
5298 	    item1 != NULL && item2 != NULL;
5299 			       item1 = item1->li_next, item2 = item2->li_next)
5300 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5301 	    return FALSE;
5302     return item1 == NULL && item2 == NULL;
5303 }
5304 
5305 /*
5306  * Return TRUE when two dictionaries have exactly the same key/values.
5307  */
5308     static int
5309 dict_equal(d1, d2, ic)
5310     dict_T	*d1;
5311     dict_T	*d2;
5312     int		ic;	/* ignore case for strings */
5313 {
5314     hashitem_T	*hi;
5315     dictitem_T	*item2;
5316     int		todo;
5317 
5318     if (dict_len(d1) != dict_len(d2))
5319 	return FALSE;
5320 
5321     todo = d1->dv_hashtab.ht_used;
5322     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5323     {
5324 	if (!HASHITEM_EMPTY(hi))
5325 	{
5326 	    item2 = dict_find(d2, hi->hi_key, -1);
5327 	    if (item2 == NULL)
5328 		return FALSE;
5329 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5330 		return FALSE;
5331 	    --todo;
5332 	}
5333     }
5334     return TRUE;
5335 }
5336 
5337 /*
5338  * Return TRUE if "tv1" and "tv2" have the same value.
5339  * Compares the items just like "==" would compare them, but strings and
5340  * numbers are different.
5341  */
5342     static int
5343 tv_equal(tv1, tv2, ic)
5344     typval_T *tv1;
5345     typval_T *tv2;
5346     int	    ic;	    /* ignore case */
5347 {
5348     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5349     char_u	*s1, *s2;
5350 
5351     if (tv1->v_type != tv2->v_type)
5352 	return FALSE;
5353 
5354     switch (tv1->v_type)
5355     {
5356 	case VAR_LIST:
5357 	    /* recursive! */
5358 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5359 
5360 	case VAR_DICT:
5361 	    /* recursive! */
5362 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5363 
5364 	case VAR_FUNC:
5365 	    return (tv1->vval.v_string != NULL
5366 		    && tv2->vval.v_string != NULL
5367 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5368 
5369 	case VAR_NUMBER:
5370 	    return tv1->vval.v_number == tv2->vval.v_number;
5371 
5372 	case VAR_STRING:
5373 	    s1 = get_tv_string_buf(tv1, buf1);
5374 	    s2 = get_tv_string_buf(tv2, buf2);
5375 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5376     }
5377 
5378     EMSG2(_(e_intern2), "tv_equal()");
5379     return TRUE;
5380 }
5381 
5382 /*
5383  * Locate item with index "n" in list "l" and return it.
5384  * A negative index is counted from the end; -1 is the last item.
5385  * Returns NULL when "n" is out of range.
5386  */
5387     static listitem_T *
5388 list_find(l, n)
5389     list_T	*l;
5390     long	n;
5391 {
5392     listitem_T	*item;
5393     long	idx;
5394 
5395     if (l == NULL)
5396 	return NULL;
5397 
5398     /* Negative index is relative to the end. */
5399     if (n < 0)
5400 	n = l->lv_len + n;
5401 
5402     /* Check for index out of range. */
5403     if (n < 0 || n >= l->lv_len)
5404 	return NULL;
5405 
5406     /* When there is a cached index may start search from there. */
5407     if (l->lv_idx_item != NULL)
5408     {
5409 	if (n < l->lv_idx / 2)
5410 	{
5411 	    /* closest to the start of the list */
5412 	    item = l->lv_first;
5413 	    idx = 0;
5414 	}
5415 	else if (n > (l->lv_idx + l->lv_len) / 2)
5416 	{
5417 	    /* closest to the end of the list */
5418 	    item = l->lv_last;
5419 	    idx = l->lv_len - 1;
5420 	}
5421 	else
5422 	{
5423 	    /* closest to the cached index */
5424 	    item = l->lv_idx_item;
5425 	    idx = l->lv_idx;
5426 	}
5427     }
5428     else
5429     {
5430 	if (n < l->lv_len / 2)
5431 	{
5432 	    /* closest to the start of the list */
5433 	    item = l->lv_first;
5434 	    idx = 0;
5435 	}
5436 	else
5437 	{
5438 	    /* closest to the end of the list */
5439 	    item = l->lv_last;
5440 	    idx = l->lv_len - 1;
5441 	}
5442     }
5443 
5444     while (n > idx)
5445     {
5446 	/* search forward */
5447 	item = item->li_next;
5448 	++idx;
5449     }
5450     while (n < idx)
5451     {
5452 	/* search backward */
5453 	item = item->li_prev;
5454 	--idx;
5455     }
5456 
5457     /* cache the used index */
5458     l->lv_idx = idx;
5459     l->lv_idx_item = item;
5460 
5461     return item;
5462 }
5463 
5464 /*
5465  * Locate "item" list "l" and return its index.
5466  * Returns -1 when "item" is not in the list.
5467  */
5468     static long
5469 list_idx_of_item(l, item)
5470     list_T	*l;
5471     listitem_T	*item;
5472 {
5473     long	idx = 0;
5474     listitem_T	*li;
5475 
5476     if (l == NULL)
5477 	return -1;
5478     idx = 0;
5479     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5480 	++idx;
5481     if (li == NULL)
5482 	return -1;
5483     return idx;
5484 }
5485 
5486 /*
5487  * Append item "item" to the end of list "l".
5488  */
5489     static void
5490 list_append(l, item)
5491     list_T	*l;
5492     listitem_T	*item;
5493 {
5494     if (l->lv_last == NULL)
5495     {
5496 	/* empty list */
5497 	l->lv_first = item;
5498 	l->lv_last = item;
5499 	item->li_prev = NULL;
5500     }
5501     else
5502     {
5503 	l->lv_last->li_next = item;
5504 	item->li_prev = l->lv_last;
5505 	l->lv_last = item;
5506     }
5507     ++l->lv_len;
5508     item->li_next = NULL;
5509 }
5510 
5511 /*
5512  * Append typval_T "tv" to the end of list "l".
5513  * Return FAIL when out of memory.
5514  */
5515     static int
5516 list_append_tv(l, tv)
5517     list_T	*l;
5518     typval_T	*tv;
5519 {
5520     listitem_T	*li = listitem_alloc();
5521 
5522     if (li == NULL)
5523 	return FAIL;
5524     copy_tv(tv, &li->li_tv);
5525     list_append(l, li);
5526     return OK;
5527 }
5528 
5529 /*
5530  * Add a dictionary to a list.  Used by getqflist().
5531  * Return FAIL when out of memory.
5532  */
5533     int
5534 list_append_dict(list, dict)
5535     list_T	*list;
5536     dict_T	*dict;
5537 {
5538     listitem_T	*li = listitem_alloc();
5539 
5540     if (li == NULL)
5541 	return FAIL;
5542     li->li_tv.v_type = VAR_DICT;
5543     li->li_tv.v_lock = 0;
5544     li->li_tv.vval.v_dict = dict;
5545     list_append(list, li);
5546     ++dict->dv_refcount;
5547     return OK;
5548 }
5549 
5550 /*
5551  * Insert typval_T "tv" in list "l" before "item".
5552  * If "item" is NULL append at the end.
5553  * Return FAIL when out of memory.
5554  */
5555     static int
5556 list_insert_tv(l, tv, item)
5557     list_T	*l;
5558     typval_T	*tv;
5559     listitem_T	*item;
5560 {
5561     listitem_T	*ni = listitem_alloc();
5562 
5563     if (ni == NULL)
5564 	return FAIL;
5565     copy_tv(tv, &ni->li_tv);
5566     if (item == NULL)
5567 	/* Append new item at end of list. */
5568 	list_append(l, ni);
5569     else
5570     {
5571 	/* Insert new item before existing item. */
5572 	ni->li_prev = item->li_prev;
5573 	ni->li_next = item;
5574 	if (item->li_prev == NULL)
5575 	{
5576 	    l->lv_first = ni;
5577 	    ++l->lv_idx;
5578 	}
5579 	else
5580 	{
5581 	    item->li_prev->li_next = ni;
5582 	    l->lv_idx_item = NULL;
5583 	}
5584 	item->li_prev = ni;
5585 	++l->lv_len;
5586     }
5587     return OK;
5588 }
5589 
5590 /*
5591  * Extend "l1" with "l2".
5592  * If "bef" is NULL append at the end, otherwise insert before this item.
5593  * Returns FAIL when out of memory.
5594  */
5595     static int
5596 list_extend(l1, l2, bef)
5597     list_T	*l1;
5598     list_T	*l2;
5599     listitem_T	*bef;
5600 {
5601     listitem_T	*item;
5602 
5603     for (item = l2->lv_first; item != NULL; item = item->li_next)
5604 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5605 	    return FAIL;
5606     return OK;
5607 }
5608 
5609 /*
5610  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5611  * Return FAIL when out of memory.
5612  */
5613     static int
5614 list_concat(l1, l2, tv)
5615     list_T	*l1;
5616     list_T	*l2;
5617     typval_T	*tv;
5618 {
5619     list_T	*l;
5620 
5621     /* make a copy of the first list. */
5622     l = list_copy(l1, FALSE, 0);
5623     if (l == NULL)
5624 	return FAIL;
5625     tv->v_type = VAR_LIST;
5626     tv->vval.v_list = l;
5627 
5628     /* append all items from the second list */
5629     return list_extend(l, l2, NULL);
5630 }
5631 
5632 /*
5633  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5634  * The refcount of the new list is set to 1.
5635  * See item_copy() for "copyID".
5636  * Returns NULL when out of memory.
5637  */
5638     static list_T *
5639 list_copy(orig, deep, copyID)
5640     list_T	*orig;
5641     int		deep;
5642     int		copyID;
5643 {
5644     list_T	*copy;
5645     listitem_T	*item;
5646     listitem_T	*ni;
5647 
5648     if (orig == NULL)
5649 	return NULL;
5650 
5651     copy = list_alloc();
5652     if (copy != NULL)
5653     {
5654 	if (copyID != 0)
5655 	{
5656 	    /* Do this before adding the items, because one of the items may
5657 	     * refer back to this list. */
5658 	    orig->lv_copyID = copyID;
5659 	    orig->lv_copylist = copy;
5660 	}
5661 	for (item = orig->lv_first; item != NULL && !got_int;
5662 							 item = item->li_next)
5663 	{
5664 	    ni = listitem_alloc();
5665 	    if (ni == NULL)
5666 		break;
5667 	    if (deep)
5668 	    {
5669 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5670 		{
5671 		    vim_free(ni);
5672 		    break;
5673 		}
5674 	    }
5675 	    else
5676 		copy_tv(&item->li_tv, &ni->li_tv);
5677 	    list_append(copy, ni);
5678 	}
5679 	++copy->lv_refcount;
5680 	if (item != NULL)
5681 	{
5682 	    list_unref(copy);
5683 	    copy = NULL;
5684 	}
5685     }
5686 
5687     return copy;
5688 }
5689 
5690 /*
5691  * Remove items "item" to "item2" from list "l".
5692  * Does not free the listitem or the value!
5693  */
5694     static void
5695 list_remove(l, item, item2)
5696     list_T	*l;
5697     listitem_T	*item;
5698     listitem_T	*item2;
5699 {
5700     listitem_T	*ip;
5701 
5702     /* notify watchers */
5703     for (ip = item; ip != NULL; ip = ip->li_next)
5704     {
5705 	--l->lv_len;
5706 	list_fix_watch(l, ip);
5707 	if (ip == item2)
5708 	    break;
5709     }
5710 
5711     if (item2->li_next == NULL)
5712 	l->lv_last = item->li_prev;
5713     else
5714 	item2->li_next->li_prev = item->li_prev;
5715     if (item->li_prev == NULL)
5716 	l->lv_first = item2->li_next;
5717     else
5718 	item->li_prev->li_next = item2->li_next;
5719     l->lv_idx_item = NULL;
5720 }
5721 
5722 /*
5723  * Return an allocated string with the string representation of a list.
5724  * May return NULL.
5725  */
5726     static char_u *
5727 list2string(tv)
5728     typval_T	*tv;
5729 {
5730     garray_T	ga;
5731 
5732     if (tv->vval.v_list == NULL)
5733 	return NULL;
5734     ga_init2(&ga, (int)sizeof(char), 80);
5735     ga_append(&ga, '[');
5736     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE) == FAIL)
5737     {
5738 	vim_free(ga.ga_data);
5739 	return NULL;
5740     }
5741     ga_append(&ga, ']');
5742     ga_append(&ga, NUL);
5743     return (char_u *)ga.ga_data;
5744 }
5745 
5746 /*
5747  * Join list "l" into a string in "*gap", using separator "sep".
5748  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5749  * Return FAIL or OK.
5750  */
5751     static int
5752 list_join(gap, l, sep, echo)
5753     garray_T	*gap;
5754     list_T	*l;
5755     char_u	*sep;
5756     int		echo;
5757 {
5758     int		first = TRUE;
5759     char_u	*tofree;
5760     char_u	numbuf[NUMBUFLEN];
5761     listitem_T	*item;
5762     char_u	*s;
5763 
5764     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5765     {
5766 	if (first)
5767 	    first = FALSE;
5768 	else
5769 	    ga_concat(gap, sep);
5770 
5771 	if (echo)
5772 	    s = echo_string(&item->li_tv, &tofree, numbuf);
5773 	else
5774 	    s = tv2string(&item->li_tv, &tofree, numbuf);
5775 	if (s != NULL)
5776 	    ga_concat(gap, s);
5777 	vim_free(tofree);
5778 	if (s == NULL)
5779 	    return FAIL;
5780     }
5781     return OK;
5782 }
5783 
5784 /*
5785  * Garbage collection for lists and dictionaries.
5786  *
5787  * We use reference counts to be able to free most items right away when they
5788  * are no longer used.  But for composite items it's possible that it becomes
5789  * unused while the reference count is > 0: When there is a recursive
5790  * reference.  Example:
5791  *	:let l = [1, 2, 3]
5792  *	:let d = {9: l}
5793  *	:let l[1] = d
5794  *
5795  * Since this is quite unusual we handle this with garbage collection: every
5796  * once in a while find out which lists and dicts are not referenced from any
5797  * variable.
5798  *
5799  * Here is a good reference text about garbage collection (refers to Python
5800  * but it applies to all reference-counting mechanisms):
5801  *	http://python.ca/nas/python/gc/
5802  */
5803 
5804 /*
5805  * Do garbage collection for lists and dicts.
5806  * Return TRUE if some memory was freed.
5807  */
5808     int
5809 garbage_collect()
5810 {
5811     dict_T	*dd;
5812     list_T	*ll;
5813     int		copyID = ++current_copyID;
5814     buf_T	*buf;
5815     win_T	*wp;
5816     int		i;
5817     funccall_T	*fc;
5818     int		did_free = FALSE;
5819 
5820     /*
5821      * 1. Go through all accessible variables and mark all lists and dicts
5822      *    with copyID.
5823      */
5824     /* script-local variables */
5825     for (i = 1; i <= ga_scripts.ga_len; ++i)
5826 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5827 
5828     /* buffer-local variables */
5829     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5830 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5831 
5832     /* window-local variables */
5833     FOR_ALL_WINDOWS(wp)
5834 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5835 
5836     /* global variables */
5837     set_ref_in_ht(&globvarht, copyID);
5838 
5839     /* function-local variables */
5840     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5841     {
5842 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5843 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5844     }
5845 
5846     /*
5847      * 2. Go through the list of dicts and free items without the copyID.
5848      */
5849     for (dd = first_dict; dd != NULL; )
5850 	if (dd->dv_copyID != copyID)
5851 	{
5852 	    dict_free(dd);
5853 	    did_free = TRUE;
5854 
5855 	    /* restart, next dict may also have been freed */
5856 	    dd = first_dict;
5857 	}
5858 	else
5859 	    dd = dd->dv_used_next;
5860 
5861     /*
5862      * 3. Go through the list of lists and free items without the copyID.
5863      */
5864     for (ll = first_list; ll != NULL; )
5865 	if (ll->lv_copyID != copyID)
5866 	{
5867 	    list_free(ll);
5868 	    did_free = TRUE;
5869 
5870 	    /* restart, next dict may also have been freed */
5871 	    ll = first_list;
5872 	}
5873 	else
5874 	    ll = ll->lv_used_next;
5875 
5876     return did_free;
5877 }
5878 
5879 /*
5880  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
5881  */
5882     static void
5883 set_ref_in_ht(ht, copyID)
5884     hashtab_T	*ht;
5885     int		copyID;
5886 {
5887     int		todo;
5888     hashitem_T	*hi;
5889 
5890     todo = ht->ht_used;
5891     for (hi = ht->ht_array; todo > 0; ++hi)
5892 	if (!HASHITEM_EMPTY(hi))
5893 	{
5894 	    --todo;
5895 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
5896 	}
5897 }
5898 
5899 /*
5900  * Mark all lists and dicts referenced through list "l" with "copyID".
5901  */
5902     static void
5903 set_ref_in_list(l, copyID)
5904     list_T	*l;
5905     int		copyID;
5906 {
5907     listitem_T *li;
5908 
5909     for (li = l->lv_first; li != NULL; li = li->li_next)
5910 	set_ref_in_item(&li->li_tv, copyID);
5911 }
5912 
5913 /*
5914  * Mark all lists and dicts referenced through typval "tv" with "copyID".
5915  */
5916     static void
5917 set_ref_in_item(tv, copyID)
5918     typval_T	*tv;
5919     int		copyID;
5920 {
5921     dict_T	*dd;
5922     list_T	*ll;
5923 
5924     switch (tv->v_type)
5925     {
5926 	case VAR_DICT:
5927 	    dd = tv->vval.v_dict;
5928 	    if (dd->dv_copyID != copyID)
5929 	    {
5930 		/* Didn't see this dict yet. */
5931 		dd->dv_copyID = copyID;
5932 		set_ref_in_ht(&dd->dv_hashtab, copyID);
5933 	    }
5934 	    break;
5935 
5936 	case VAR_LIST:
5937 	    ll = tv->vval.v_list;
5938 	    if (ll->lv_copyID != copyID)
5939 	    {
5940 		/* Didn't see this list yet. */
5941 		ll->lv_copyID = copyID;
5942 		set_ref_in_list(ll, copyID);
5943 	    }
5944 	    break;
5945     }
5946     return;
5947 }
5948 
5949 /*
5950  * Allocate an empty header for a dictionary.
5951  */
5952     dict_T *
5953 dict_alloc()
5954 {
5955     dict_T *d;
5956 
5957     d = (dict_T *)alloc(sizeof(dict_T));
5958     if (d != NULL)
5959     {
5960 	/* Add the list to the hashtable for garbage collection. */
5961 	if (first_dict != NULL)
5962 	    first_dict->dv_used_prev = d;
5963 	d->dv_used_next = first_dict;
5964 	d->dv_used_prev = NULL;
5965 
5966 	hash_init(&d->dv_hashtab);
5967 	d->dv_lock = 0;
5968 	d->dv_refcount = 0;
5969 	d->dv_copyID = 0;
5970     }
5971     return d;
5972 }
5973 
5974 /*
5975  * Unreference a Dictionary: decrement the reference count and free it when it
5976  * becomes zero.
5977  */
5978     static void
5979 dict_unref(d)
5980     dict_T *d;
5981 {
5982     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
5983 	dict_free(d);
5984 }
5985 
5986 /*
5987  * Free a Dictionary, including all items it contains.
5988  * Ignores the reference count.
5989  */
5990     static void
5991 dict_free(d)
5992     dict_T *d;
5993 {
5994     int		todo;
5995     hashitem_T	*hi;
5996     dictitem_T	*di;
5997 
5998     /* Avoid that recursive reference to the dict frees us again. */
5999     d->dv_refcount = DEL_REFCOUNT;
6000 
6001     /* Remove the dict from the list of dicts for garbage collection. */
6002     if (d->dv_used_prev == NULL)
6003 	first_dict = d->dv_used_next;
6004     else
6005 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6006     if (d->dv_used_next != NULL)
6007 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6008 
6009     /* Lock the hashtab, we don't want it to resize while freeing items. */
6010     hash_lock(&d->dv_hashtab);
6011     todo = d->dv_hashtab.ht_used;
6012     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6013     {
6014 	if (!HASHITEM_EMPTY(hi))
6015 	{
6016 	    /* Remove the item before deleting it, just in case there is
6017 	     * something recursive causing trouble. */
6018 	    di = HI2DI(hi);
6019 	    hash_remove(&d->dv_hashtab, hi);
6020 	    dictitem_free(di);
6021 	    --todo;
6022 	}
6023     }
6024     hash_clear(&d->dv_hashtab);
6025     vim_free(d);
6026 }
6027 
6028 /*
6029  * Allocate a Dictionary item.
6030  * The "key" is copied to the new item.
6031  * Note that the value of the item "di_tv" still needs to be initialized!
6032  * Returns NULL when out of memory.
6033  */
6034     static dictitem_T *
6035 dictitem_alloc(key)
6036     char_u	*key;
6037 {
6038     dictitem_T *di;
6039 
6040     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6041     if (di != NULL)
6042     {
6043 	STRCPY(di->di_key, key);
6044 	di->di_flags = 0;
6045     }
6046     return di;
6047 }
6048 
6049 /*
6050  * Make a copy of a Dictionary item.
6051  */
6052     static dictitem_T *
6053 dictitem_copy(org)
6054     dictitem_T *org;
6055 {
6056     dictitem_T *di;
6057 
6058     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6059     if (di != NULL)
6060     {
6061 	STRCPY(di->di_key, org->di_key);
6062 	di->di_flags = 0;
6063 	copy_tv(&org->di_tv, &di->di_tv);
6064     }
6065     return di;
6066 }
6067 
6068 /*
6069  * Remove item "item" from Dictionary "dict" and free it.
6070  */
6071     static void
6072 dictitem_remove(dict, item)
6073     dict_T	*dict;
6074     dictitem_T	*item;
6075 {
6076     hashitem_T	*hi;
6077 
6078     hi = hash_find(&dict->dv_hashtab, item->di_key);
6079     if (HASHITEM_EMPTY(hi))
6080 	EMSG2(_(e_intern2), "dictitem_remove()");
6081     else
6082 	hash_remove(&dict->dv_hashtab, hi);
6083     dictitem_free(item);
6084 }
6085 
6086 /*
6087  * Free a dict item.  Also clears the value.
6088  */
6089     static void
6090 dictitem_free(item)
6091     dictitem_T *item;
6092 {
6093     clear_tv(&item->di_tv);
6094     vim_free(item);
6095 }
6096 
6097 /*
6098  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6099  * The refcount of the new dict is set to 1.
6100  * See item_copy() for "copyID".
6101  * Returns NULL when out of memory.
6102  */
6103     static dict_T *
6104 dict_copy(orig, deep, copyID)
6105     dict_T	*orig;
6106     int		deep;
6107     int		copyID;
6108 {
6109     dict_T	*copy;
6110     dictitem_T	*di;
6111     int		todo;
6112     hashitem_T	*hi;
6113 
6114     if (orig == NULL)
6115 	return NULL;
6116 
6117     copy = dict_alloc();
6118     if (copy != NULL)
6119     {
6120 	if (copyID != 0)
6121 	{
6122 	    orig->dv_copyID = copyID;
6123 	    orig->dv_copydict = copy;
6124 	}
6125 	todo = orig->dv_hashtab.ht_used;
6126 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6127 	{
6128 	    if (!HASHITEM_EMPTY(hi))
6129 	    {
6130 		--todo;
6131 
6132 		di = dictitem_alloc(hi->hi_key);
6133 		if (di == NULL)
6134 		    break;
6135 		if (deep)
6136 		{
6137 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6138 							      copyID) == FAIL)
6139 		    {
6140 			vim_free(di);
6141 			break;
6142 		    }
6143 		}
6144 		else
6145 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6146 		if (dict_add(copy, di) == FAIL)
6147 		{
6148 		    dictitem_free(di);
6149 		    break;
6150 		}
6151 	    }
6152 	}
6153 
6154 	++copy->dv_refcount;
6155 	if (todo > 0)
6156 	{
6157 	    dict_unref(copy);
6158 	    copy = NULL;
6159 	}
6160     }
6161 
6162     return copy;
6163 }
6164 
6165 /*
6166  * Add item "item" to Dictionary "d".
6167  * Returns FAIL when out of memory and when key already existed.
6168  */
6169     static int
6170 dict_add(d, item)
6171     dict_T	*d;
6172     dictitem_T	*item;
6173 {
6174     return hash_add(&d->dv_hashtab, item->di_key);
6175 }
6176 
6177 /*
6178  * Add a number or string entry to dictionary "d".
6179  * When "str" is NULL use number "nr", otherwise use "str".
6180  * Returns FAIL when out of memory and when key already exists.
6181  */
6182     int
6183 dict_add_nr_str(d, key, nr, str)
6184     dict_T	*d;
6185     char	*key;
6186     long	nr;
6187     char_u	*str;
6188 {
6189     dictitem_T	*item;
6190 
6191     item = dictitem_alloc((char_u *)key);
6192     if (item == NULL)
6193 	return FAIL;
6194     item->di_tv.v_lock = 0;
6195     if (str == NULL)
6196     {
6197 	item->di_tv.v_type = VAR_NUMBER;
6198 	item->di_tv.vval.v_number = nr;
6199     }
6200     else
6201     {
6202 	item->di_tv.v_type = VAR_STRING;
6203 	item->di_tv.vval.v_string = vim_strsave(str);
6204     }
6205     if (dict_add(d, item) == FAIL)
6206     {
6207 	dictitem_free(item);
6208 	return FAIL;
6209     }
6210     return OK;
6211 }
6212 
6213 /*
6214  * Get the number of items in a Dictionary.
6215  */
6216     static long
6217 dict_len(d)
6218     dict_T	*d;
6219 {
6220     if (d == NULL)
6221 	return 0L;
6222     return d->dv_hashtab.ht_used;
6223 }
6224 
6225 /*
6226  * Find item "key[len]" in Dictionary "d".
6227  * If "len" is negative use strlen(key).
6228  * Returns NULL when not found.
6229  */
6230     static dictitem_T *
6231 dict_find(d, key, len)
6232     dict_T	*d;
6233     char_u	*key;
6234     int		len;
6235 {
6236 #define AKEYLEN 200
6237     char_u	buf[AKEYLEN];
6238     char_u	*akey;
6239     char_u	*tofree = NULL;
6240     hashitem_T	*hi;
6241 
6242     if (len < 0)
6243 	akey = key;
6244     else if (len >= AKEYLEN)
6245     {
6246 	tofree = akey = vim_strnsave(key, len);
6247 	if (akey == NULL)
6248 	    return NULL;
6249     }
6250     else
6251     {
6252 	/* Avoid a malloc/free by using buf[]. */
6253 	vim_strncpy(buf, key, len);
6254 	akey = buf;
6255     }
6256 
6257     hi = hash_find(&d->dv_hashtab, akey);
6258     vim_free(tofree);
6259     if (HASHITEM_EMPTY(hi))
6260 	return NULL;
6261     return HI2DI(hi);
6262 }
6263 
6264 /*
6265  * Get a string item from a dictionary in allocated memory.
6266  * Returns NULL if the entry doesn't exist or out of memory.
6267  */
6268     char_u *
6269 get_dict_string(d, key)
6270     dict_T	*d;
6271     char_u	*key;
6272 {
6273     dictitem_T	*di;
6274 
6275     di = dict_find(d, key, -1);
6276     if (di == NULL)
6277 	return NULL;
6278     return vim_strsave(get_tv_string(&di->di_tv));
6279 }
6280 
6281 /*
6282  * Get a number item from a dictionary.
6283  * Returns 0 if the entry doesn't exist or out of memory.
6284  */
6285     long
6286 get_dict_number(d, key)
6287     dict_T	*d;
6288     char_u	*key;
6289 {
6290     dictitem_T	*di;
6291 
6292     di = dict_find(d, key, -1);
6293     if (di == NULL)
6294 	return 0;
6295     return get_tv_number(&di->di_tv);
6296 }
6297 
6298 /*
6299  * Return an allocated string with the string representation of a Dictionary.
6300  * May return NULL.
6301  */
6302     static char_u *
6303 dict2string(tv)
6304     typval_T	*tv;
6305 {
6306     garray_T	ga;
6307     int		first = TRUE;
6308     char_u	*tofree;
6309     char_u	numbuf[NUMBUFLEN];
6310     hashitem_T	*hi;
6311     char_u	*s;
6312     dict_T	*d;
6313     int		todo;
6314 
6315     if ((d = tv->vval.v_dict) == NULL)
6316 	return NULL;
6317     ga_init2(&ga, (int)sizeof(char), 80);
6318     ga_append(&ga, '{');
6319 
6320     todo = d->dv_hashtab.ht_used;
6321     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6322     {
6323 	if (!HASHITEM_EMPTY(hi))
6324 	{
6325 	    --todo;
6326 
6327 	    if (first)
6328 		first = FALSE;
6329 	    else
6330 		ga_concat(&ga, (char_u *)", ");
6331 
6332 	    tofree = string_quote(hi->hi_key, FALSE);
6333 	    if (tofree != NULL)
6334 	    {
6335 		ga_concat(&ga, tofree);
6336 		vim_free(tofree);
6337 	    }
6338 	    ga_concat(&ga, (char_u *)": ");
6339 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf);
6340 	    if (s != NULL)
6341 		ga_concat(&ga, s);
6342 	    vim_free(tofree);
6343 	    if (s == NULL)
6344 		break;
6345 	}
6346     }
6347     if (todo > 0)
6348     {
6349 	vim_free(ga.ga_data);
6350 	return NULL;
6351     }
6352 
6353     ga_append(&ga, '}');
6354     ga_append(&ga, NUL);
6355     return (char_u *)ga.ga_data;
6356 }
6357 
6358 /*
6359  * Allocate a variable for a Dictionary and fill it from "*arg".
6360  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6361  */
6362     static int
6363 get_dict_tv(arg, rettv, evaluate)
6364     char_u	**arg;
6365     typval_T	*rettv;
6366     int		evaluate;
6367 {
6368     dict_T	*d = NULL;
6369     typval_T	tvkey;
6370     typval_T	tv;
6371     char_u	*key;
6372     dictitem_T	*item;
6373     char_u	*start = skipwhite(*arg + 1);
6374     char_u	buf[NUMBUFLEN];
6375 
6376     /*
6377      * First check if it's not a curly-braces thing: {expr}.
6378      * Must do this without evaluating, otherwise a function may be called
6379      * twice.  Unfortunately this means we need to call eval1() twice for the
6380      * first item.
6381      * But {} is an empty Dictionary.
6382      */
6383     if (*start != '}')
6384     {
6385 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6386 	    return FAIL;
6387 	if (*start == '}')
6388 	    return NOTDONE;
6389     }
6390 
6391     if (evaluate)
6392     {
6393 	d = dict_alloc();
6394 	if (d == NULL)
6395 	    return FAIL;
6396     }
6397     tvkey.v_type = VAR_UNKNOWN;
6398     tv.v_type = VAR_UNKNOWN;
6399 
6400     *arg = skipwhite(*arg + 1);
6401     while (**arg != '}' && **arg != NUL)
6402     {
6403 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6404 	    goto failret;
6405 	if (**arg != ':')
6406 	{
6407 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6408 	    clear_tv(&tvkey);
6409 	    goto failret;
6410 	}
6411 	key = get_tv_string_buf_chk(&tvkey, buf);
6412 	if (key == NULL || *key == NUL)
6413 	{
6414 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6415 	    if (key != NULL)
6416 		EMSG(_(e_emptykey));
6417 	    clear_tv(&tvkey);
6418 	    goto failret;
6419 	}
6420 
6421 	*arg = skipwhite(*arg + 1);
6422 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6423 	{
6424 	    clear_tv(&tvkey);
6425 	    goto failret;
6426 	}
6427 	if (evaluate)
6428 	{
6429 	    item = dict_find(d, key, -1);
6430 	    if (item != NULL)
6431 	    {
6432 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6433 		clear_tv(&tvkey);
6434 		clear_tv(&tv);
6435 		goto failret;
6436 	    }
6437 	    item = dictitem_alloc(key);
6438 	    clear_tv(&tvkey);
6439 	    if (item != NULL)
6440 	    {
6441 		item->di_tv = tv;
6442 		item->di_tv.v_lock = 0;
6443 		if (dict_add(d, item) == FAIL)
6444 		    dictitem_free(item);
6445 	    }
6446 	}
6447 
6448 	if (**arg == '}')
6449 	    break;
6450 	if (**arg != ',')
6451 	{
6452 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6453 	    goto failret;
6454 	}
6455 	*arg = skipwhite(*arg + 1);
6456     }
6457 
6458     if (**arg != '}')
6459     {
6460 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6461 failret:
6462 	if (evaluate)
6463 	    dict_free(d);
6464 	return FAIL;
6465     }
6466 
6467     *arg = skipwhite(*arg + 1);
6468     if (evaluate)
6469     {
6470 	rettv->v_type = VAR_DICT;
6471 	rettv->vval.v_dict = d;
6472 	++d->dv_refcount;
6473     }
6474 
6475     return OK;
6476 }
6477 
6478 /*
6479  * Return a string with the string representation of a variable.
6480  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6481  * "numbuf" is used for a number.
6482  * Does not put quotes around strings, as ":echo" displays values.
6483  * May return NULL;
6484  */
6485     static char_u *
6486 echo_string(tv, tofree, numbuf)
6487     typval_T	*tv;
6488     char_u	**tofree;
6489     char_u	*numbuf;
6490 {
6491     static int	recurse = 0;
6492     char_u	*r = NULL;
6493 
6494     if (recurse >= DICT_MAXNEST)
6495     {
6496 	EMSG(_("E724: variable nested too deep for displaying"));
6497 	*tofree = NULL;
6498 	return NULL;
6499     }
6500     ++recurse;
6501 
6502     switch (tv->v_type)
6503     {
6504 	case VAR_FUNC:
6505 	    *tofree = NULL;
6506 	    r = tv->vval.v_string;
6507 	    break;
6508 	case VAR_LIST:
6509 	    *tofree = list2string(tv);
6510 	    r = *tofree;
6511 	    break;
6512 	case VAR_DICT:
6513 	    *tofree = dict2string(tv);
6514 	    r = *tofree;
6515 	    break;
6516 	case VAR_STRING:
6517 	case VAR_NUMBER:
6518 	    *tofree = NULL;
6519 	    r = get_tv_string_buf(tv, numbuf);
6520 	    break;
6521 	default:
6522 	    EMSG2(_(e_intern2), "echo_string()");
6523 	    *tofree = NULL;
6524     }
6525 
6526     --recurse;
6527     return r;
6528 }
6529 
6530 /*
6531  * Return a string with the string representation of a variable.
6532  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6533  * "numbuf" is used for a number.
6534  * Puts quotes around strings, so that they can be parsed back by eval().
6535  * May return NULL;
6536  */
6537     static char_u *
6538 tv2string(tv, tofree, numbuf)
6539     typval_T	*tv;
6540     char_u	**tofree;
6541     char_u	*numbuf;
6542 {
6543     switch (tv->v_type)
6544     {
6545 	case VAR_FUNC:
6546 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6547 	    return *tofree;
6548 	case VAR_STRING:
6549 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6550 	    return *tofree;
6551 	case VAR_NUMBER:
6552 	case VAR_LIST:
6553 	case VAR_DICT:
6554 	    break;
6555 	default:
6556 	    EMSG2(_(e_intern2), "tv2string()");
6557     }
6558     return echo_string(tv, tofree, numbuf);
6559 }
6560 
6561 /*
6562  * Return string "str" in ' quotes, doubling ' characters.
6563  * If "str" is NULL an empty string is assumed.
6564  * If "function" is TRUE make it function('string').
6565  */
6566     static char_u *
6567 string_quote(str, function)
6568     char_u	*str;
6569     int		function;
6570 {
6571     unsigned	len;
6572     char_u	*p, *r, *s;
6573 
6574     len = (function ? 13 : 3);
6575     if (str != NULL)
6576     {
6577 	len += STRLEN(str);
6578 	for (p = str; *p != NUL; mb_ptr_adv(p))
6579 	    if (*p == '\'')
6580 		++len;
6581     }
6582     s = r = alloc(len);
6583     if (r != NULL)
6584     {
6585 	if (function)
6586 	{
6587 	    STRCPY(r, "function('");
6588 	    r += 10;
6589 	}
6590 	else
6591 	    *r++ = '\'';
6592 	if (str != NULL)
6593 	    for (p = str; *p != NUL; )
6594 	    {
6595 		if (*p == '\'')
6596 		    *r++ = '\'';
6597 		MB_COPY_CHAR(p, r);
6598 	    }
6599 	*r++ = '\'';
6600 	if (function)
6601 	    *r++ = ')';
6602 	*r++ = NUL;
6603     }
6604     return s;
6605 }
6606 
6607 /*
6608  * Get the value of an environment variable.
6609  * "arg" is pointing to the '$'.  It is advanced to after the name.
6610  * If the environment variable was not set, silently assume it is empty.
6611  * Always return OK.
6612  */
6613     static int
6614 get_env_tv(arg, rettv, evaluate)
6615     char_u	**arg;
6616     typval_T	*rettv;
6617     int		evaluate;
6618 {
6619     char_u	*string = NULL;
6620     int		len;
6621     int		cc;
6622     char_u	*name;
6623     int		mustfree = FALSE;
6624 
6625     ++*arg;
6626     name = *arg;
6627     len = get_env_len(arg);
6628     if (evaluate)
6629     {
6630 	if (len != 0)
6631 	{
6632 	    cc = name[len];
6633 	    name[len] = NUL;
6634 	    /* first try vim_getenv(), fast for normal environment vars */
6635 	    string = vim_getenv(name, &mustfree);
6636 	    if (string != NULL && *string != NUL)
6637 	    {
6638 		if (!mustfree)
6639 		    string = vim_strsave(string);
6640 	    }
6641 	    else
6642 	    {
6643 		if (mustfree)
6644 		    vim_free(string);
6645 
6646 		/* next try expanding things like $VIM and ${HOME} */
6647 		string = expand_env_save(name - 1);
6648 		if (string != NULL && *string == '$')
6649 		{
6650 		    vim_free(string);
6651 		    string = NULL;
6652 		}
6653 	    }
6654 	    name[len] = cc;
6655 	}
6656 	rettv->v_type = VAR_STRING;
6657 	rettv->vval.v_string = string;
6658     }
6659 
6660     return OK;
6661 }
6662 
6663 /*
6664  * Array with names and number of arguments of all internal functions
6665  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6666  */
6667 static struct fst
6668 {
6669     char	*f_name;	/* function name */
6670     char	f_min_argc;	/* minimal number of arguments */
6671     char	f_max_argc;	/* maximal number of arguments */
6672     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6673 				/* implemenation of function */
6674 } functions[] =
6675 {
6676     {"add",		2, 2, f_add},
6677     {"append",		2, 2, f_append},
6678     {"argc",		0, 0, f_argc},
6679     {"argidx",		0, 0, f_argidx},
6680     {"argv",		1, 1, f_argv},
6681     {"browse",		4, 4, f_browse},
6682     {"browsedir",	2, 2, f_browsedir},
6683     {"bufexists",	1, 1, f_bufexists},
6684     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6685     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6686     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6687     {"buflisted",	1, 1, f_buflisted},
6688     {"bufloaded",	1, 1, f_bufloaded},
6689     {"bufname",		1, 1, f_bufname},
6690     {"bufnr",		1, 1, f_bufnr},
6691     {"bufwinnr",	1, 1, f_bufwinnr},
6692     {"byte2line",	1, 1, f_byte2line},
6693     {"byteidx",		2, 2, f_byteidx},
6694     {"call",		2, 3, f_call},
6695     {"char2nr",		1, 1, f_char2nr},
6696     {"cindent",		1, 1, f_cindent},
6697     {"col",		1, 1, f_col},
6698 #if defined(FEAT_INS_EXPAND)
6699     {"complete_add",	1, 1, f_complete_add},
6700     {"complete_check",	0, 0, f_complete_check},
6701 #endif
6702     {"confirm",		1, 4, f_confirm},
6703     {"copy",		1, 1, f_copy},
6704     {"count",		2, 4, f_count},
6705     {"cscope_connection",0,3, f_cscope_connection},
6706     {"cursor",		2, 2, f_cursor},
6707     {"deepcopy",	1, 2, f_deepcopy},
6708     {"delete",		1, 1, f_delete},
6709     {"did_filetype",	0, 0, f_did_filetype},
6710     {"diff_filler",	1, 1, f_diff_filler},
6711     {"diff_hlID",	2, 2, f_diff_hlID},
6712     {"empty",		1, 1, f_empty},
6713     {"escape",		2, 2, f_escape},
6714     {"eval",		1, 1, f_eval},
6715     {"eventhandler",	0, 0, f_eventhandler},
6716     {"executable",	1, 1, f_executable},
6717     {"exists",		1, 1, f_exists},
6718     {"expand",		1, 2, f_expand},
6719     {"extend",		2, 3, f_extend},
6720     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6721     {"filereadable",	1, 1, f_filereadable},
6722     {"filewritable",	1, 1, f_filewritable},
6723     {"filter",		2, 2, f_filter},
6724     {"finddir",		1, 3, f_finddir},
6725     {"findfile",	1, 3, f_findfile},
6726     {"fnamemodify",	2, 2, f_fnamemodify},
6727     {"foldclosed",	1, 1, f_foldclosed},
6728     {"foldclosedend",	1, 1, f_foldclosedend},
6729     {"foldlevel",	1, 1, f_foldlevel},
6730     {"foldtext",	0, 0, f_foldtext},
6731     {"foldtextresult",	1, 1, f_foldtextresult},
6732     {"foreground",	0, 0, f_foreground},
6733     {"function",	1, 1, f_function},
6734     {"garbagecollect",	0, 0, f_garbagecollect},
6735     {"get",		2, 3, f_get},
6736     {"getbufline",	2, 3, f_getbufline},
6737     {"getbufvar",	2, 2, f_getbufvar},
6738     {"getchar",		0, 1, f_getchar},
6739     {"getcharmod",	0, 0, f_getcharmod},
6740     {"getcmdline",	0, 0, f_getcmdline},
6741     {"getcmdpos",	0, 0, f_getcmdpos},
6742     {"getcwd",		0, 0, f_getcwd},
6743     {"getfontname",	0, 1, f_getfontname},
6744     {"getfperm",	1, 1, f_getfperm},
6745     {"getfsize",	1, 1, f_getfsize},
6746     {"getftime",	1, 1, f_getftime},
6747     {"getftype",	1, 1, f_getftype},
6748     {"getline",		1, 2, f_getline},
6749     {"getqflist",	0, 0, f_getqflist},
6750     {"getreg",		0, 2, f_getreg},
6751     {"getregtype",	0, 1, f_getregtype},
6752     {"getwinposx",	0, 0, f_getwinposx},
6753     {"getwinposy",	0, 0, f_getwinposy},
6754     {"getwinvar",	2, 2, f_getwinvar},
6755     {"glob",		1, 1, f_glob},
6756     {"globpath",	2, 2, f_globpath},
6757     {"has",		1, 1, f_has},
6758     {"has_key",		2, 2, f_has_key},
6759     {"hasmapto",	1, 2, f_hasmapto},
6760     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6761     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6762     {"histadd",		2, 2, f_histadd},
6763     {"histdel",		1, 2, f_histdel},
6764     {"histget",		1, 2, f_histget},
6765     {"histnr",		1, 1, f_histnr},
6766     {"hlID",		1, 1, f_hlID},
6767     {"hlexists",	1, 1, f_hlexists},
6768     {"hostname",	0, 0, f_hostname},
6769     {"iconv",		3, 3, f_iconv},
6770     {"indent",		1, 1, f_indent},
6771     {"index",		2, 4, f_index},
6772     {"input",		1, 2, f_input},
6773     {"inputdialog",	1, 3, f_inputdialog},
6774     {"inputrestore",	0, 0, f_inputrestore},
6775     {"inputsave",	0, 0, f_inputsave},
6776     {"inputsecret",	1, 2, f_inputsecret},
6777     {"insert",		2, 3, f_insert},
6778     {"isdirectory",	1, 1, f_isdirectory},
6779     {"islocked",	1, 1, f_islocked},
6780     {"items",		1, 1, f_items},
6781     {"join",		1, 2, f_join},
6782     {"keys",		1, 1, f_keys},
6783     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6784     {"len",		1, 1, f_len},
6785     {"libcall",		3, 3, f_libcall},
6786     {"libcallnr",	3, 3, f_libcallnr},
6787     {"line",		1, 1, f_line},
6788     {"line2byte",	1, 1, f_line2byte},
6789     {"lispindent",	1, 1, f_lispindent},
6790     {"localtime",	0, 0, f_localtime},
6791     {"map",		2, 2, f_map},
6792     {"maparg",		1, 2, f_maparg},
6793     {"mapcheck",	1, 2, f_mapcheck},
6794     {"match",		2, 4, f_match},
6795     {"matchend",	2, 4, f_matchend},
6796     {"matchlist",	2, 4, f_matchlist},
6797     {"matchstr",	2, 4, f_matchstr},
6798     {"max",		1, 1, f_max},
6799     {"min",		1, 1, f_min},
6800 #ifdef vim_mkdir
6801     {"mkdir",		1, 3, f_mkdir},
6802 #endif
6803     {"mode",		0, 0, f_mode},
6804     {"nextnonblank",	1, 1, f_nextnonblank},
6805     {"nr2char",		1, 1, f_nr2char},
6806     {"prevnonblank",	1, 1, f_prevnonblank},
6807     {"printf",		2, 19, f_printf},
6808     {"range",		1, 3, f_range},
6809     {"readfile",	1, 3, f_readfile},
6810     {"remote_expr",	2, 3, f_remote_expr},
6811     {"remote_foreground", 1, 1, f_remote_foreground},
6812     {"remote_peek",	1, 2, f_remote_peek},
6813     {"remote_read",	1, 1, f_remote_read},
6814     {"remote_send",	2, 3, f_remote_send},
6815     {"remove",		2, 3, f_remove},
6816     {"rename",		2, 2, f_rename},
6817     {"repeat",		2, 2, f_repeat},
6818     {"resolve",		1, 1, f_resolve},
6819     {"reverse",		1, 1, f_reverse},
6820     {"search",		1, 2, f_search},
6821     {"searchpair",	3, 5, f_searchpair},
6822     {"server2client",	2, 2, f_server2client},
6823     {"serverlist",	0, 0, f_serverlist},
6824     {"setbufvar",	3, 3, f_setbufvar},
6825     {"setcmdpos",	1, 1, f_setcmdpos},
6826     {"setline",		2, 2, f_setline},
6827     {"setqflist",	1, 2, f_setqflist},
6828     {"setreg",		2, 3, f_setreg},
6829     {"setwinvar",	3, 3, f_setwinvar},
6830     {"simplify",	1, 1, f_simplify},
6831     {"sort",		1, 2, f_sort},
6832     {"soundfold",	1, 1, f_soundfold},
6833     {"spellbadword",	0, 0, f_spellbadword},
6834     {"spellsuggest",	1, 2, f_spellsuggest},
6835     {"split",		1, 3, f_split},
6836 #ifdef HAVE_STRFTIME
6837     {"strftime",	1, 2, f_strftime},
6838 #endif
6839     {"stridx",		2, 3, f_stridx},
6840     {"string",		1, 1, f_string},
6841     {"strlen",		1, 1, f_strlen},
6842     {"strpart",		2, 3, f_strpart},
6843     {"strridx",		2, 3, f_strridx},
6844     {"strtrans",	1, 1, f_strtrans},
6845     {"submatch",	1, 1, f_submatch},
6846     {"substitute",	4, 4, f_substitute},
6847     {"synID",		3, 3, f_synID},
6848     {"synIDattr",	2, 3, f_synIDattr},
6849     {"synIDtrans",	1, 1, f_synIDtrans},
6850     {"system",		1, 2, f_system},
6851     {"taglist",		1, 1, f_taglist},
6852     {"tempname",	0, 0, f_tempname},
6853     {"test",		1, 1, f_test},
6854     {"tolower",		1, 1, f_tolower},
6855     {"toupper",		1, 1, f_toupper},
6856     {"tr",		3, 3, f_tr},
6857     {"type",		1, 1, f_type},
6858     {"values",		1, 1, f_values},
6859     {"virtcol",		1, 1, f_virtcol},
6860     {"visualmode",	0, 1, f_visualmode},
6861     {"winbufnr",	1, 1, f_winbufnr},
6862     {"wincol",		0, 0, f_wincol},
6863     {"winheight",	1, 1, f_winheight},
6864     {"winline",		0, 0, f_winline},
6865     {"winnr",		0, 1, f_winnr},
6866     {"winrestcmd",	0, 0, f_winrestcmd},
6867     {"winwidth",	1, 1, f_winwidth},
6868     {"writefile",	2, 3, f_writefile},
6869 };
6870 
6871 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
6872 
6873 /*
6874  * Function given to ExpandGeneric() to obtain the list of internal
6875  * or user defined function names.
6876  */
6877     char_u *
6878 get_function_name(xp, idx)
6879     expand_T	*xp;
6880     int		idx;
6881 {
6882     static int	intidx = -1;
6883     char_u	*name;
6884 
6885     if (idx == 0)
6886 	intidx = -1;
6887     if (intidx < 0)
6888     {
6889 	name = get_user_func_name(xp, idx);
6890 	if (name != NULL)
6891 	    return name;
6892     }
6893     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
6894     {
6895 	STRCPY(IObuff, functions[intidx].f_name);
6896 	STRCAT(IObuff, "(");
6897 	if (functions[intidx].f_max_argc == 0)
6898 	    STRCAT(IObuff, ")");
6899 	return IObuff;
6900     }
6901 
6902     return NULL;
6903 }
6904 
6905 /*
6906  * Function given to ExpandGeneric() to obtain the list of internal or
6907  * user defined variable or function names.
6908  */
6909 /*ARGSUSED*/
6910     char_u *
6911 get_expr_name(xp, idx)
6912     expand_T	*xp;
6913     int		idx;
6914 {
6915     static int	intidx = -1;
6916     char_u	*name;
6917 
6918     if (idx == 0)
6919 	intidx = -1;
6920     if (intidx < 0)
6921     {
6922 	name = get_function_name(xp, idx);
6923 	if (name != NULL)
6924 	    return name;
6925     }
6926     return get_user_var_name(xp, ++intidx);
6927 }
6928 
6929 #endif /* FEAT_CMDL_COMPL */
6930 
6931 /*
6932  * Find internal function in table above.
6933  * Return index, or -1 if not found
6934  */
6935     static int
6936 find_internal_func(name)
6937     char_u	*name;		/* name of the function */
6938 {
6939     int		first = 0;
6940     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
6941     int		cmp;
6942     int		x;
6943 
6944     /*
6945      * Find the function name in the table. Binary search.
6946      */
6947     while (first <= last)
6948     {
6949 	x = first + ((unsigned)(last - first) >> 1);
6950 	cmp = STRCMP(name, functions[x].f_name);
6951 	if (cmp < 0)
6952 	    last = x - 1;
6953 	else if (cmp > 0)
6954 	    first = x + 1;
6955 	else
6956 	    return x;
6957     }
6958     return -1;
6959 }
6960 
6961 /*
6962  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
6963  * name it contains, otherwise return "name".
6964  */
6965     static char_u *
6966 deref_func_name(name, lenp)
6967     char_u	*name;
6968     int		*lenp;
6969 {
6970     dictitem_T	*v;
6971     int		cc;
6972 
6973     cc = name[*lenp];
6974     name[*lenp] = NUL;
6975     v = find_var(name, NULL);
6976     name[*lenp] = cc;
6977     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
6978     {
6979 	if (v->di_tv.vval.v_string == NULL)
6980 	{
6981 	    *lenp = 0;
6982 	    return (char_u *)"";	/* just in case */
6983 	}
6984 	*lenp = STRLEN(v->di_tv.vval.v_string);
6985 	return v->di_tv.vval.v_string;
6986     }
6987 
6988     return name;
6989 }
6990 
6991 /*
6992  * Allocate a variable for the result of a function.
6993  * Return OK or FAIL.
6994  */
6995     static int
6996 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
6997 							   evaluate, selfdict)
6998     char_u	*name;		/* name of the function */
6999     int		len;		/* length of "name" */
7000     typval_T	*rettv;
7001     char_u	**arg;		/* argument, pointing to the '(' */
7002     linenr_T	firstline;	/* first line of range */
7003     linenr_T	lastline;	/* last line of range */
7004     int		*doesrange;	/* return: function handled range */
7005     int		evaluate;
7006     dict_T	*selfdict;	/* Dictionary for "self" */
7007 {
7008     char_u	*argp;
7009     int		ret = OK;
7010     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7011     int		argcount = 0;		/* number of arguments found */
7012 
7013     /*
7014      * Get the arguments.
7015      */
7016     argp = *arg;
7017     while (argcount < MAX_FUNC_ARGS)
7018     {
7019 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7020 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7021 	    break;
7022 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7023 	{
7024 	    ret = FAIL;
7025 	    break;
7026 	}
7027 	++argcount;
7028 	if (*argp != ',')
7029 	    break;
7030     }
7031     if (*argp == ')')
7032 	++argp;
7033     else
7034 	ret = FAIL;
7035 
7036     if (ret == OK)
7037 	ret = call_func(name, len, rettv, argcount, argvars,
7038 			  firstline, lastline, doesrange, evaluate, selfdict);
7039     else if (!aborting())
7040     {
7041 	if (argcount == MAX_FUNC_ARGS)
7042 	    emsg_funcname("E740: Too many arguments for function %s", name);
7043 	else
7044 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7045     }
7046 
7047     while (--argcount >= 0)
7048 	clear_tv(&argvars[argcount]);
7049 
7050     *arg = skipwhite(argp);
7051     return ret;
7052 }
7053 
7054 
7055 /*
7056  * Call a function with its resolved parameters
7057  * Return OK or FAIL.
7058  */
7059     static int
7060 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7061 						doesrange, evaluate, selfdict)
7062     char_u	*name;		/* name of the function */
7063     int		len;		/* length of "name" */
7064     typval_T	*rettv;		/* return value goes here */
7065     int		argcount;	/* number of "argvars" */
7066     typval_T	*argvars;	/* vars for arguments */
7067     linenr_T	firstline;	/* first line of range */
7068     linenr_T	lastline;	/* last line of range */
7069     int		*doesrange;	/* return: function handled range */
7070     int		evaluate;
7071     dict_T	*selfdict;	/* Dictionary for "self" */
7072 {
7073     int		ret = FAIL;
7074 #define ERROR_UNKNOWN	0
7075 #define ERROR_TOOMANY	1
7076 #define ERROR_TOOFEW	2
7077 #define ERROR_SCRIPT	3
7078 #define ERROR_DICT	4
7079 #define ERROR_NONE	5
7080 #define ERROR_OTHER	6
7081     int		error = ERROR_NONE;
7082     int		i;
7083     int		llen;
7084     ufunc_T	*fp;
7085     int		cc;
7086 #define FLEN_FIXED 40
7087     char_u	fname_buf[FLEN_FIXED + 1];
7088     char_u	*fname;
7089 
7090     /*
7091      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7092      * Change <SNR>123_name() to K_SNR 123_name().
7093      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7094      */
7095     cc = name[len];
7096     name[len] = NUL;
7097     llen = eval_fname_script(name);
7098     if (llen > 0)
7099     {
7100 	fname_buf[0] = K_SPECIAL;
7101 	fname_buf[1] = KS_EXTRA;
7102 	fname_buf[2] = (int)KE_SNR;
7103 	i = 3;
7104 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7105 	{
7106 	    if (current_SID <= 0)
7107 		error = ERROR_SCRIPT;
7108 	    else
7109 	    {
7110 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7111 		i = (int)STRLEN(fname_buf);
7112 	    }
7113 	}
7114 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7115 	{
7116 	    STRCPY(fname_buf + i, name + llen);
7117 	    fname = fname_buf;
7118 	}
7119 	else
7120 	{
7121 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7122 	    if (fname == NULL)
7123 		error = ERROR_OTHER;
7124 	    else
7125 	    {
7126 		mch_memmove(fname, fname_buf, (size_t)i);
7127 		STRCPY(fname + i, name + llen);
7128 	    }
7129 	}
7130     }
7131     else
7132 	fname = name;
7133 
7134     *doesrange = FALSE;
7135 
7136 
7137     /* execute the function if no errors detected and executing */
7138     if (evaluate && error == ERROR_NONE)
7139     {
7140 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7141 	error = ERROR_UNKNOWN;
7142 
7143 	if (!builtin_function(fname))
7144 	{
7145 	    /*
7146 	     * User defined function.
7147 	     */
7148 	    fp = find_func(fname);
7149 
7150 #ifdef FEAT_AUTOCMD
7151 	    /* Trigger FuncUndefined event, may load the function. */
7152 	    if (fp == NULL
7153 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7154 						     fname, fname, TRUE, NULL)
7155 		    && !aborting())
7156 	    {
7157 		/* executed an autocommand, search for the function again */
7158 		fp = find_func(fname);
7159 	    }
7160 #endif
7161 	    /* Try loading a package. */
7162 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7163 	    {
7164 		/* loaded a package, search for the function again */
7165 		fp = find_func(fname);
7166 	    }
7167 
7168 	    if (fp != NULL)
7169 	    {
7170 		if (fp->uf_flags & FC_RANGE)
7171 		    *doesrange = TRUE;
7172 		if (argcount < fp->uf_args.ga_len)
7173 		    error = ERROR_TOOFEW;
7174 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7175 		    error = ERROR_TOOMANY;
7176 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7177 		    error = ERROR_DICT;
7178 		else
7179 		{
7180 		    /*
7181 		     * Call the user function.
7182 		     * Save and restore search patterns, script variables and
7183 		     * redo buffer.
7184 		     */
7185 		    save_search_patterns();
7186 		    saveRedobuff();
7187 		    ++fp->uf_calls;
7188 		    call_user_func(fp, argcount, argvars, rettv,
7189 					       firstline, lastline,
7190 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7191 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7192 						      && fp->uf_refcount <= 0)
7193 			/* Function was unreferenced while being used, free it
7194 			 * now. */
7195 			func_free(fp);
7196 		    restoreRedobuff();
7197 		    restore_search_patterns();
7198 		    error = ERROR_NONE;
7199 		}
7200 	    }
7201 	}
7202 	else
7203 	{
7204 	    /*
7205 	     * Find the function name in the table, call its implementation.
7206 	     */
7207 	    i = find_internal_func(fname);
7208 	    if (i >= 0)
7209 	    {
7210 		if (argcount < functions[i].f_min_argc)
7211 		    error = ERROR_TOOFEW;
7212 		else if (argcount > functions[i].f_max_argc)
7213 		    error = ERROR_TOOMANY;
7214 		else
7215 		{
7216 		    argvars[argcount].v_type = VAR_UNKNOWN;
7217 		    functions[i].f_func(argvars, rettv);
7218 		    error = ERROR_NONE;
7219 		}
7220 	    }
7221 	}
7222 	/*
7223 	 * The function call (or "FuncUndefined" autocommand sequence) might
7224 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7225 	 * exception that has not been caught so far.  This situation can be
7226 	 * tested for by calling aborting().  For an error in an internal
7227 	 * function or for the "E132" error in call_user_func(), however, the
7228 	 * throw point at which the "force_abort" flag (temporarily reset by
7229 	 * emsg()) is normally updated has not been reached yet. We need to
7230 	 * update that flag first to make aborting() reliable.
7231 	 */
7232 	update_force_abort();
7233     }
7234     if (error == ERROR_NONE)
7235 	ret = OK;
7236 
7237     /*
7238      * Report an error unless the argument evaluation or function call has been
7239      * cancelled due to an aborting error, an interrupt, or an exception.
7240      */
7241     if (!aborting())
7242     {
7243 	switch (error)
7244 	{
7245 	    case ERROR_UNKNOWN:
7246 		    emsg_funcname("E117: Unknown function: %s", name);
7247 		    break;
7248 	    case ERROR_TOOMANY:
7249 		    emsg_funcname(e_toomanyarg, name);
7250 		    break;
7251 	    case ERROR_TOOFEW:
7252 		    emsg_funcname("E119: Not enough arguments for function: %s",
7253 									name);
7254 		    break;
7255 	    case ERROR_SCRIPT:
7256 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7257 									name);
7258 		    break;
7259 	    case ERROR_DICT:
7260 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7261 									name);
7262 		    break;
7263 	}
7264     }
7265 
7266     name[len] = cc;
7267     if (fname != name && fname != fname_buf)
7268 	vim_free(fname);
7269 
7270     return ret;
7271 }
7272 
7273 /*
7274  * Give an error message with a function name.  Handle <SNR> things.
7275  */
7276     static void
7277 emsg_funcname(msg, name)
7278     char	*msg;
7279     char_u	*name;
7280 {
7281     char_u	*p;
7282 
7283     if (*name == K_SPECIAL)
7284 	p = concat_str((char_u *)"<SNR>", name + 3);
7285     else
7286 	p = name;
7287     EMSG2(_(msg), p);
7288     if (p != name)
7289 	vim_free(p);
7290 }
7291 
7292 /*********************************************
7293  * Implementation of the built-in functions
7294  */
7295 
7296 /*
7297  * "add(list, item)" function
7298  */
7299     static void
7300 f_add(argvars, rettv)
7301     typval_T	*argvars;
7302     typval_T	*rettv;
7303 {
7304     list_T	*l;
7305 
7306     rettv->vval.v_number = 1; /* Default: Failed */
7307     if (argvars[0].v_type == VAR_LIST)
7308     {
7309 	if ((l = argvars[0].vval.v_list) != NULL
7310 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7311 		&& list_append_tv(l, &argvars[1]) == OK)
7312 	    copy_tv(&argvars[0], rettv);
7313     }
7314     else
7315 	EMSG(_(e_listreq));
7316 }
7317 
7318 /*
7319  * "append(lnum, string/list)" function
7320  */
7321     static void
7322 f_append(argvars, rettv)
7323     typval_T	*argvars;
7324     typval_T	*rettv;
7325 {
7326     long	lnum;
7327     char_u	*line;
7328     list_T	*l = NULL;
7329     listitem_T	*li = NULL;
7330     typval_T	*tv;
7331     long	added = 0;
7332 
7333     lnum = get_tv_lnum(argvars);
7334     if (lnum >= 0
7335 	    && lnum <= curbuf->b_ml.ml_line_count
7336 	    && u_save(lnum, lnum + 1) == OK)
7337     {
7338 	if (argvars[1].v_type == VAR_LIST)
7339 	{
7340 	    l = argvars[1].vval.v_list;
7341 	    if (l == NULL)
7342 		return;
7343 	    li = l->lv_first;
7344 	}
7345 	rettv->vval.v_number = 0;	/* Default: Success */
7346 	for (;;)
7347 	{
7348 	    if (l == NULL)
7349 		tv = &argvars[1];	/* append a string */
7350 	    else if (li == NULL)
7351 		break;			/* end of list */
7352 	    else
7353 		tv = &li->li_tv;	/* append item from list */
7354 	    line = get_tv_string_chk(tv);
7355 	    if (line == NULL)		/* type error */
7356 	    {
7357 		rettv->vval.v_number = 1;	/* Failed */
7358 		break;
7359 	    }
7360 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7361 	    ++added;
7362 	    if (l == NULL)
7363 		break;
7364 	    li = li->li_next;
7365 	}
7366 
7367 	appended_lines_mark(lnum, added);
7368 	if (curwin->w_cursor.lnum > lnum)
7369 	    curwin->w_cursor.lnum += added;
7370     }
7371     else
7372 	rettv->vval.v_number = 1;	/* Failed */
7373 }
7374 
7375 /*
7376  * "argc()" function
7377  */
7378 /* ARGSUSED */
7379     static void
7380 f_argc(argvars, rettv)
7381     typval_T	*argvars;
7382     typval_T	*rettv;
7383 {
7384     rettv->vval.v_number = ARGCOUNT;
7385 }
7386 
7387 /*
7388  * "argidx()" function
7389  */
7390 /* ARGSUSED */
7391     static void
7392 f_argidx(argvars, rettv)
7393     typval_T	*argvars;
7394     typval_T	*rettv;
7395 {
7396     rettv->vval.v_number = curwin->w_arg_idx;
7397 }
7398 
7399 /*
7400  * "argv(nr)" function
7401  */
7402     static void
7403 f_argv(argvars, rettv)
7404     typval_T	*argvars;
7405     typval_T	*rettv;
7406 {
7407     int		idx;
7408 
7409     idx = get_tv_number_chk(&argvars[0], NULL);
7410     if (idx >= 0 && idx < ARGCOUNT)
7411 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7412     else
7413 	rettv->vval.v_string = NULL;
7414     rettv->v_type = VAR_STRING;
7415 }
7416 
7417 /*
7418  * "browse(save, title, initdir, default)" function
7419  */
7420 /* ARGSUSED */
7421     static void
7422 f_browse(argvars, rettv)
7423     typval_T	*argvars;
7424     typval_T	*rettv;
7425 {
7426 #ifdef FEAT_BROWSE
7427     int		save;
7428     char_u	*title;
7429     char_u	*initdir;
7430     char_u	*defname;
7431     char_u	buf[NUMBUFLEN];
7432     char_u	buf2[NUMBUFLEN];
7433     int		error = FALSE;
7434 
7435     save = get_tv_number_chk(&argvars[0], &error);
7436     title = get_tv_string_chk(&argvars[1]);
7437     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7438     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7439 
7440     if (error || title == NULL || initdir == NULL || defname == NULL)
7441 	rettv->vval.v_string = NULL;
7442     else
7443 	rettv->vval.v_string =
7444 		 do_browse(save ? BROWSE_SAVE : 0,
7445 				 title, defname, NULL, initdir, NULL, curbuf);
7446 #else
7447     rettv->vval.v_string = NULL;
7448 #endif
7449     rettv->v_type = VAR_STRING;
7450 }
7451 
7452 /*
7453  * "browsedir(title, initdir)" function
7454  */
7455 /* ARGSUSED */
7456     static void
7457 f_browsedir(argvars, rettv)
7458     typval_T	*argvars;
7459     typval_T	*rettv;
7460 {
7461 #ifdef FEAT_BROWSE
7462     char_u	*title;
7463     char_u	*initdir;
7464     char_u	buf[NUMBUFLEN];
7465 
7466     title = get_tv_string_chk(&argvars[0]);
7467     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7468 
7469     if (title == NULL || initdir == NULL)
7470 	rettv->vval.v_string = NULL;
7471     else
7472 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7473 				    title, NULL, NULL, initdir, NULL, curbuf);
7474 #else
7475     rettv->vval.v_string = NULL;
7476 #endif
7477     rettv->v_type = VAR_STRING;
7478 }
7479 
7480 static buf_T *find_buffer __ARGS((typval_T *avar));
7481 
7482 /*
7483  * Find a buffer by number or exact name.
7484  */
7485     static buf_T *
7486 find_buffer(avar)
7487     typval_T	*avar;
7488 {
7489     buf_T	*buf = NULL;
7490 
7491     if (avar->v_type == VAR_NUMBER)
7492 	buf = buflist_findnr((int)avar->vval.v_number);
7493     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7494     {
7495 	buf = buflist_findname_exp(avar->vval.v_string);
7496 	if (buf == NULL)
7497 	{
7498 	    /* No full path name match, try a match with a URL or a "nofile"
7499 	     * buffer, these don't use the full path. */
7500 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7501 		if (buf->b_fname != NULL
7502 			&& (path_with_url(buf->b_fname)
7503 #ifdef FEAT_QUICKFIX
7504 			    || bt_nofile(buf)
7505 #endif
7506 			   )
7507 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7508 		    break;
7509 	}
7510     }
7511     return buf;
7512 }
7513 
7514 /*
7515  * "bufexists(expr)" function
7516  */
7517     static void
7518 f_bufexists(argvars, rettv)
7519     typval_T	*argvars;
7520     typval_T	*rettv;
7521 {
7522     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7523 }
7524 
7525 /*
7526  * "buflisted(expr)" function
7527  */
7528     static void
7529 f_buflisted(argvars, rettv)
7530     typval_T	*argvars;
7531     typval_T	*rettv;
7532 {
7533     buf_T	*buf;
7534 
7535     buf = find_buffer(&argvars[0]);
7536     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7537 }
7538 
7539 /*
7540  * "bufloaded(expr)" function
7541  */
7542     static void
7543 f_bufloaded(argvars, rettv)
7544     typval_T	*argvars;
7545     typval_T	*rettv;
7546 {
7547     buf_T	*buf;
7548 
7549     buf = find_buffer(&argvars[0]);
7550     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7551 }
7552 
7553 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7554 
7555 /*
7556  * Get buffer by number or pattern.
7557  */
7558     static buf_T *
7559 get_buf_tv(tv)
7560     typval_T	*tv;
7561 {
7562     char_u	*name = tv->vval.v_string;
7563     int		save_magic;
7564     char_u	*save_cpo;
7565     buf_T	*buf;
7566 
7567     if (tv->v_type == VAR_NUMBER)
7568 	return buflist_findnr((int)tv->vval.v_number);
7569     if (tv->v_type != VAR_STRING)
7570 	return NULL;
7571     if (name == NULL || *name == NUL)
7572 	return curbuf;
7573     if (name[0] == '$' && name[1] == NUL)
7574 	return lastbuf;
7575 
7576     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7577     save_magic = p_magic;
7578     p_magic = TRUE;
7579     save_cpo = p_cpo;
7580     p_cpo = (char_u *)"";
7581 
7582     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7583 								TRUE, FALSE));
7584 
7585     p_magic = save_magic;
7586     p_cpo = save_cpo;
7587 
7588     /* If not found, try expanding the name, like done for bufexists(). */
7589     if (buf == NULL)
7590 	buf = find_buffer(tv);
7591 
7592     return buf;
7593 }
7594 
7595 /*
7596  * "bufname(expr)" function
7597  */
7598     static void
7599 f_bufname(argvars, rettv)
7600     typval_T	*argvars;
7601     typval_T	*rettv;
7602 {
7603     buf_T	*buf;
7604 
7605     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7606     ++emsg_off;
7607     buf = get_buf_tv(&argvars[0]);
7608     rettv->v_type = VAR_STRING;
7609     if (buf != NULL && buf->b_fname != NULL)
7610 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7611     else
7612 	rettv->vval.v_string = NULL;
7613     --emsg_off;
7614 }
7615 
7616 /*
7617  * "bufnr(expr)" function
7618  */
7619     static void
7620 f_bufnr(argvars, rettv)
7621     typval_T	*argvars;
7622     typval_T	*rettv;
7623 {
7624     buf_T	*buf;
7625 
7626     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7627     ++emsg_off;
7628     buf = get_buf_tv(&argvars[0]);
7629     if (buf != NULL)
7630 	rettv->vval.v_number = buf->b_fnum;
7631     else
7632 	rettv->vval.v_number = -1;
7633     --emsg_off;
7634 }
7635 
7636 /*
7637  * "bufwinnr(nr)" function
7638  */
7639     static void
7640 f_bufwinnr(argvars, rettv)
7641     typval_T	*argvars;
7642     typval_T	*rettv;
7643 {
7644 #ifdef FEAT_WINDOWS
7645     win_T	*wp;
7646     int		winnr = 0;
7647 #endif
7648     buf_T	*buf;
7649 
7650     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7651     ++emsg_off;
7652     buf = get_buf_tv(&argvars[0]);
7653 #ifdef FEAT_WINDOWS
7654     for (wp = firstwin; wp; wp = wp->w_next)
7655     {
7656 	++winnr;
7657 	if (wp->w_buffer == buf)
7658 	    break;
7659     }
7660     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7661 #else
7662     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7663 #endif
7664     --emsg_off;
7665 }
7666 
7667 /*
7668  * "byte2line(byte)" function
7669  */
7670 /*ARGSUSED*/
7671     static void
7672 f_byte2line(argvars, rettv)
7673     typval_T	*argvars;
7674     typval_T	*rettv;
7675 {
7676 #ifndef FEAT_BYTEOFF
7677     rettv->vval.v_number = -1;
7678 #else
7679     long	boff = 0;
7680 
7681     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7682     if (boff < 0)
7683 	rettv->vval.v_number = -1;
7684     else
7685 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7686 							  (linenr_T)0, &boff);
7687 #endif
7688 }
7689 
7690 /*
7691  * "byteidx()" function
7692  */
7693 /*ARGSUSED*/
7694     static void
7695 f_byteidx(argvars, rettv)
7696     typval_T	*argvars;
7697     typval_T	*rettv;
7698 {
7699 #ifdef FEAT_MBYTE
7700     char_u	*t;
7701 #endif
7702     char_u	*str;
7703     long	idx;
7704 
7705     str = get_tv_string_chk(&argvars[0]);
7706     idx = get_tv_number_chk(&argvars[1], NULL);
7707     rettv->vval.v_number = -1;
7708     if (str == NULL || idx < 0)
7709 	return;
7710 
7711 #ifdef FEAT_MBYTE
7712     t = str;
7713     for ( ; idx > 0; idx--)
7714     {
7715 	if (*t == NUL)		/* EOL reached */
7716 	    return;
7717 	t += (*mb_ptr2len)(t);
7718     }
7719     rettv->vval.v_number = t - str;
7720 #else
7721     if (idx <= STRLEN(str))
7722 	rettv->vval.v_number = idx;
7723 #endif
7724 }
7725 
7726 /*
7727  * "call(func, arglist)" function
7728  */
7729     static void
7730 f_call(argvars, rettv)
7731     typval_T	*argvars;
7732     typval_T	*rettv;
7733 {
7734     char_u	*func;
7735     typval_T	argv[MAX_FUNC_ARGS];
7736     int		argc = 0;
7737     listitem_T	*item;
7738     int		dummy;
7739     dict_T	*selfdict = NULL;
7740 
7741     rettv->vval.v_number = 0;
7742     if (argvars[1].v_type != VAR_LIST)
7743     {
7744 	EMSG(_(e_listreq));
7745 	return;
7746     }
7747     if (argvars[1].vval.v_list == NULL)
7748 	return;
7749 
7750     if (argvars[0].v_type == VAR_FUNC)
7751 	func = argvars[0].vval.v_string;
7752     else
7753 	func = get_tv_string(&argvars[0]);
7754     if (*func == NUL)
7755 	return;		/* type error or empty name */
7756 
7757     if (argvars[2].v_type != VAR_UNKNOWN)
7758     {
7759 	if (argvars[2].v_type != VAR_DICT)
7760 	{
7761 	    EMSG(_(e_dictreq));
7762 	    return;
7763 	}
7764 	selfdict = argvars[2].vval.v_dict;
7765     }
7766 
7767     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7768 							 item = item->li_next)
7769     {
7770 	if (argc == MAX_FUNC_ARGS)
7771 	{
7772 	    EMSG(_("E699: Too many arguments"));
7773 	    break;
7774 	}
7775 	/* Make a copy of each argument.  This is needed to be able to set
7776 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7777 	 */
7778 	copy_tv(&item->li_tv, &argv[argc++]);
7779     }
7780 
7781     if (item == NULL)
7782 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
7783 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
7784 						      &dummy, TRUE, selfdict);
7785 
7786     /* Free the arguments. */
7787     while (argc > 0)
7788 	clear_tv(&argv[--argc]);
7789 }
7790 
7791 /*
7792  * "char2nr(string)" function
7793  */
7794     static void
7795 f_char2nr(argvars, rettv)
7796     typval_T	*argvars;
7797     typval_T	*rettv;
7798 {
7799 #ifdef FEAT_MBYTE
7800     if (has_mbyte)
7801 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
7802     else
7803 #endif
7804     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
7805 }
7806 
7807 /*
7808  * "cindent(lnum)" function
7809  */
7810     static void
7811 f_cindent(argvars, rettv)
7812     typval_T	*argvars;
7813     typval_T	*rettv;
7814 {
7815 #ifdef FEAT_CINDENT
7816     pos_T	pos;
7817     linenr_T	lnum;
7818 
7819     pos = curwin->w_cursor;
7820     lnum = get_tv_lnum(argvars);
7821     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
7822     {
7823 	curwin->w_cursor.lnum = lnum;
7824 	rettv->vval.v_number = get_c_indent();
7825 	curwin->w_cursor = pos;
7826     }
7827     else
7828 #endif
7829 	rettv->vval.v_number = -1;
7830 }
7831 
7832 /*
7833  * "col(string)" function
7834  */
7835     static void
7836 f_col(argvars, rettv)
7837     typval_T	*argvars;
7838     typval_T	*rettv;
7839 {
7840     colnr_T	col = 0;
7841     pos_T	*fp;
7842 
7843     fp = var2fpos(&argvars[0], FALSE);
7844     if (fp != NULL)
7845     {
7846 	if (fp->col == MAXCOL)
7847 	{
7848 	    /* '> can be MAXCOL, get the length of the line then */
7849 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
7850 		col = STRLEN(ml_get(fp->lnum)) + 1;
7851 	    else
7852 		col = MAXCOL;
7853 	}
7854 	else
7855 	{
7856 	    col = fp->col + 1;
7857 #ifdef FEAT_VIRTUALEDIT
7858 	    /* col(".") when the cursor is on the NUL at the end of the line
7859 	     * because of "coladd" can be seen as an extra column. */
7860 	    if (virtual_active() && fp == &curwin->w_cursor)
7861 	    {
7862 		char_u	*p = ml_get_cursor();
7863 
7864 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
7865 				 curwin->w_virtcol - curwin->w_cursor.coladd))
7866 		{
7867 # ifdef FEAT_MBYTE
7868 		    int		l;
7869 
7870 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
7871 			col += l;
7872 # else
7873 		    if (*p != NUL && p[1] == NUL)
7874 			++col;
7875 # endif
7876 		}
7877 	    }
7878 #endif
7879 	}
7880     }
7881     rettv->vval.v_number = col;
7882 }
7883 
7884 #if defined(FEAT_INS_EXPAND)
7885 /*
7886  * "complete_add()" function
7887  */
7888 /*ARGSUSED*/
7889     static void
7890 f_complete_add(argvars, rettv)
7891     typval_T	*argvars;
7892     typval_T	*rettv;
7893 {
7894     char_u	*s;
7895 
7896     s = get_tv_string_chk(&argvars[0]);
7897     if (s != NULL)
7898 	rettv->vval.v_number = ins_compl_add(s, -1, NULL, FORWARD, 0);
7899 }
7900 
7901 /*
7902  * "complete_check()" function
7903  */
7904 /*ARGSUSED*/
7905     static void
7906 f_complete_check(argvars, rettv)
7907     typval_T	*argvars;
7908     typval_T	*rettv;
7909 {
7910     int		saved = RedrawingDisabled;
7911 
7912     RedrawingDisabled = 0;
7913     ins_compl_check_keys(0);
7914     rettv->vval.v_number = compl_interrupted;
7915     RedrawingDisabled = saved;
7916 }
7917 #endif
7918 
7919 /*
7920  * "confirm(message, buttons[, default [, type]])" function
7921  */
7922 /*ARGSUSED*/
7923     static void
7924 f_confirm(argvars, rettv)
7925     typval_T	*argvars;
7926     typval_T	*rettv;
7927 {
7928 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
7929     char_u	*message;
7930     char_u	*buttons = NULL;
7931     char_u	buf[NUMBUFLEN];
7932     char_u	buf2[NUMBUFLEN];
7933     int		def = 1;
7934     int		type = VIM_GENERIC;
7935     char_u	*typestr;
7936     int		error = FALSE;
7937 
7938     message = get_tv_string_chk(&argvars[0]);
7939     if (message == NULL)
7940 	error = TRUE;
7941     if (argvars[1].v_type != VAR_UNKNOWN)
7942     {
7943 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
7944 	if (buttons == NULL)
7945 	    error = TRUE;
7946 	if (argvars[2].v_type != VAR_UNKNOWN)
7947 	{
7948 	    def = get_tv_number_chk(&argvars[2], &error);
7949 	    if (argvars[3].v_type != VAR_UNKNOWN)
7950 	    {
7951 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
7952 		if (typestr == NULL)
7953 		    error = TRUE;
7954 		else
7955 		{
7956 		    switch (TOUPPER_ASC(*typestr))
7957 		    {
7958 			case 'E': type = VIM_ERROR; break;
7959 			case 'Q': type = VIM_QUESTION; break;
7960 			case 'I': type = VIM_INFO; break;
7961 			case 'W': type = VIM_WARNING; break;
7962 			case 'G': type = VIM_GENERIC; break;
7963 		    }
7964 		}
7965 	    }
7966 	}
7967     }
7968 
7969     if (buttons == NULL || *buttons == NUL)
7970 	buttons = (char_u *)_("&Ok");
7971 
7972     if (error)
7973 	rettv->vval.v_number = 0;
7974     else
7975 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
7976 								   def, NULL);
7977 #else
7978     rettv->vval.v_number = 0;
7979 #endif
7980 }
7981 
7982 /*
7983  * "copy()" function
7984  */
7985     static void
7986 f_copy(argvars, rettv)
7987     typval_T	*argvars;
7988     typval_T	*rettv;
7989 {
7990     item_copy(&argvars[0], rettv, FALSE, 0);
7991 }
7992 
7993 /*
7994  * "count()" function
7995  */
7996     static void
7997 f_count(argvars, rettv)
7998     typval_T	*argvars;
7999     typval_T	*rettv;
8000 {
8001     long	n = 0;
8002     int		ic = FALSE;
8003 
8004     if (argvars[0].v_type == VAR_LIST)
8005     {
8006 	listitem_T	*li;
8007 	list_T		*l;
8008 	long		idx;
8009 
8010 	if ((l = argvars[0].vval.v_list) != NULL)
8011 	{
8012 	    li = l->lv_first;
8013 	    if (argvars[2].v_type != VAR_UNKNOWN)
8014 	    {
8015 		int error = FALSE;
8016 
8017 		ic = get_tv_number_chk(&argvars[2], &error);
8018 		if (argvars[3].v_type != VAR_UNKNOWN)
8019 		{
8020 		    idx = get_tv_number_chk(&argvars[3], &error);
8021 		    if (!error)
8022 		    {
8023 			li = list_find(l, idx);
8024 			if (li == NULL)
8025 			    EMSGN(_(e_listidx), idx);
8026 		    }
8027 		}
8028 		if (error)
8029 		    li = NULL;
8030 	    }
8031 
8032 	    for ( ; li != NULL; li = li->li_next)
8033 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8034 		    ++n;
8035 	}
8036     }
8037     else if (argvars[0].v_type == VAR_DICT)
8038     {
8039 	int		todo;
8040 	dict_T		*d;
8041 	hashitem_T	*hi;
8042 
8043 	if ((d = argvars[0].vval.v_dict) != NULL)
8044 	{
8045 	    int error = FALSE;
8046 
8047 	    if (argvars[2].v_type != VAR_UNKNOWN)
8048 	    {
8049 		ic = get_tv_number_chk(&argvars[2], &error);
8050 		if (argvars[3].v_type != VAR_UNKNOWN)
8051 		    EMSG(_(e_invarg));
8052 	    }
8053 
8054 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8055 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8056 	    {
8057 		if (!HASHITEM_EMPTY(hi))
8058 		{
8059 		    --todo;
8060 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8061 			++n;
8062 		}
8063 	    }
8064 	}
8065     }
8066     else
8067 	EMSG2(_(e_listdictarg), "count()");
8068     rettv->vval.v_number = n;
8069 }
8070 
8071 /*
8072  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8073  *
8074  * Checks the existence of a cscope connection.
8075  */
8076 /*ARGSUSED*/
8077     static void
8078 f_cscope_connection(argvars, rettv)
8079     typval_T	*argvars;
8080     typval_T	*rettv;
8081 {
8082 #ifdef FEAT_CSCOPE
8083     int		num = 0;
8084     char_u	*dbpath = NULL;
8085     char_u	*prepend = NULL;
8086     char_u	buf[NUMBUFLEN];
8087 
8088     if (argvars[0].v_type != VAR_UNKNOWN
8089 	    && argvars[1].v_type != VAR_UNKNOWN)
8090     {
8091 	num = (int)get_tv_number(&argvars[0]);
8092 	dbpath = get_tv_string(&argvars[1]);
8093 	if (argvars[2].v_type != VAR_UNKNOWN)
8094 	    prepend = get_tv_string_buf(&argvars[2], buf);
8095     }
8096 
8097     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8098 #else
8099     rettv->vval.v_number = 0;
8100 #endif
8101 }
8102 
8103 /*
8104  * "cursor(lnum, col)" function
8105  *
8106  * Moves the cursor to the specified line and column
8107  */
8108 /*ARGSUSED*/
8109     static void
8110 f_cursor(argvars, rettv)
8111     typval_T	*argvars;
8112     typval_T	*rettv;
8113 {
8114     long	line, col;
8115 
8116     line = get_tv_lnum(argvars);
8117     col = get_tv_number_chk(&argvars[1], NULL);
8118     if (line < 0 || col < 0)
8119 	return;		/* type error; errmsg already given */
8120     if (line > 0)
8121 	curwin->w_cursor.lnum = line;
8122     if (col > 0)
8123 	curwin->w_cursor.col = col - 1;
8124 #ifdef FEAT_VIRTUALEDIT
8125     curwin->w_cursor.coladd = 0;
8126 #endif
8127 
8128     /* Make sure the cursor is in a valid position. */
8129     check_cursor();
8130 #ifdef FEAT_MBYTE
8131     /* Correct cursor for multi-byte character. */
8132     if (has_mbyte)
8133 	mb_adjust_cursor();
8134 #endif
8135 
8136     curwin->w_set_curswant = TRUE;
8137 }
8138 
8139 /*
8140  * "deepcopy()" function
8141  */
8142     static void
8143 f_deepcopy(argvars, rettv)
8144     typval_T	*argvars;
8145     typval_T	*rettv;
8146 {
8147     int		noref = 0;
8148 
8149     if (argvars[1].v_type != VAR_UNKNOWN)
8150 	noref = get_tv_number_chk(&argvars[1], NULL);
8151     if (noref < 0 || noref > 1)
8152 	EMSG(_(e_invarg));
8153     else
8154 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8155 }
8156 
8157 /*
8158  * "delete()" function
8159  */
8160     static void
8161 f_delete(argvars, rettv)
8162     typval_T	*argvars;
8163     typval_T	*rettv;
8164 {
8165     if (check_restricted() || check_secure())
8166 	rettv->vval.v_number = -1;
8167     else
8168 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8169 }
8170 
8171 /*
8172  * "did_filetype()" function
8173  */
8174 /*ARGSUSED*/
8175     static void
8176 f_did_filetype(argvars, rettv)
8177     typval_T	*argvars;
8178     typval_T	*rettv;
8179 {
8180 #ifdef FEAT_AUTOCMD
8181     rettv->vval.v_number = did_filetype;
8182 #else
8183     rettv->vval.v_number = 0;
8184 #endif
8185 }
8186 
8187 /*
8188  * "diff_filler()" function
8189  */
8190 /*ARGSUSED*/
8191     static void
8192 f_diff_filler(argvars, rettv)
8193     typval_T	*argvars;
8194     typval_T	*rettv;
8195 {
8196 #ifdef FEAT_DIFF
8197     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8198 #endif
8199 }
8200 
8201 /*
8202  * "diff_hlID()" function
8203  */
8204 /*ARGSUSED*/
8205     static void
8206 f_diff_hlID(argvars, rettv)
8207     typval_T	*argvars;
8208     typval_T	*rettv;
8209 {
8210 #ifdef FEAT_DIFF
8211     linenr_T		lnum = get_tv_lnum(argvars);
8212     static linenr_T	prev_lnum = 0;
8213     static int		changedtick = 0;
8214     static int		fnum = 0;
8215     static int		change_start = 0;
8216     static int		change_end = 0;
8217     static enum hlf_value hlID = 0;
8218     int			filler_lines;
8219     int			col;
8220 
8221     if (lnum < 0)	/* ignore type error in {lnum} arg */
8222 	lnum = 0;
8223     if (lnum != prev_lnum
8224 	    || changedtick != curbuf->b_changedtick
8225 	    || fnum != curbuf->b_fnum)
8226     {
8227 	/* New line, buffer, change: need to get the values. */
8228 	filler_lines = diff_check(curwin, lnum);
8229 	if (filler_lines < 0)
8230 	{
8231 	    if (filler_lines == -1)
8232 	    {
8233 		change_start = MAXCOL;
8234 		change_end = -1;
8235 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8236 		    hlID = HLF_ADD;	/* added line */
8237 		else
8238 		    hlID = HLF_CHD;	/* changed line */
8239 	    }
8240 	    else
8241 		hlID = HLF_ADD;	/* added line */
8242 	}
8243 	else
8244 	    hlID = (enum hlf_value)0;
8245 	prev_lnum = lnum;
8246 	changedtick = curbuf->b_changedtick;
8247 	fnum = curbuf->b_fnum;
8248     }
8249 
8250     if (hlID == HLF_CHD || hlID == HLF_TXD)
8251     {
8252 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8253 	if (col >= change_start && col <= change_end)
8254 	    hlID = HLF_TXD;			/* changed text */
8255 	else
8256 	    hlID = HLF_CHD;			/* changed line */
8257     }
8258     rettv->vval.v_number = hlID == (enum hlf_value)0 ? 0 : (int)hlID;
8259 #endif
8260 }
8261 
8262 /*
8263  * "empty({expr})" function
8264  */
8265     static void
8266 f_empty(argvars, rettv)
8267     typval_T	*argvars;
8268     typval_T	*rettv;
8269 {
8270     int		n;
8271 
8272     switch (argvars[0].v_type)
8273     {
8274 	case VAR_STRING:
8275 	case VAR_FUNC:
8276 	    n = argvars[0].vval.v_string == NULL
8277 					  || *argvars[0].vval.v_string == NUL;
8278 	    break;
8279 	case VAR_NUMBER:
8280 	    n = argvars[0].vval.v_number == 0;
8281 	    break;
8282 	case VAR_LIST:
8283 	    n = argvars[0].vval.v_list == NULL
8284 				  || argvars[0].vval.v_list->lv_first == NULL;
8285 	    break;
8286 	case VAR_DICT:
8287 	    n = argvars[0].vval.v_dict == NULL
8288 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8289 	    break;
8290 	default:
8291 	    EMSG2(_(e_intern2), "f_empty()");
8292 	    n = 0;
8293     }
8294 
8295     rettv->vval.v_number = n;
8296 }
8297 
8298 /*
8299  * "escape({string}, {chars})" function
8300  */
8301     static void
8302 f_escape(argvars, rettv)
8303     typval_T	*argvars;
8304     typval_T	*rettv;
8305 {
8306     char_u	buf[NUMBUFLEN];
8307 
8308     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8309 					 get_tv_string_buf(&argvars[1], buf));
8310     rettv->v_type = VAR_STRING;
8311 }
8312 
8313 /*
8314  * "eval()" function
8315  */
8316 /*ARGSUSED*/
8317     static void
8318 f_eval(argvars, rettv)
8319     typval_T	*argvars;
8320     typval_T	*rettv;
8321 {
8322     char_u	*s;
8323 
8324     s = get_tv_string_chk(&argvars[0]);
8325     if (s != NULL)
8326 	s = skipwhite(s);
8327 
8328     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8329     {
8330 	rettv->v_type = VAR_NUMBER;
8331 	rettv->vval.v_number = 0;
8332     }
8333     else if (*s != NUL)
8334 	EMSG(_(e_trailing));
8335 }
8336 
8337 /*
8338  * "eventhandler()" function
8339  */
8340 /*ARGSUSED*/
8341     static void
8342 f_eventhandler(argvars, rettv)
8343     typval_T	*argvars;
8344     typval_T	*rettv;
8345 {
8346     rettv->vval.v_number = vgetc_busy;
8347 }
8348 
8349 /*
8350  * "executable()" function
8351  */
8352     static void
8353 f_executable(argvars, rettv)
8354     typval_T	*argvars;
8355     typval_T	*rettv;
8356 {
8357     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8358 }
8359 
8360 /*
8361  * "exists()" function
8362  */
8363     static void
8364 f_exists(argvars, rettv)
8365     typval_T	*argvars;
8366     typval_T	*rettv;
8367 {
8368     char_u	*p;
8369     char_u	*name;
8370     int		n = FALSE;
8371     int		len = 0;
8372 
8373     p = get_tv_string(&argvars[0]);
8374     if (*p == '$')			/* environment variable */
8375     {
8376 	/* first try "normal" environment variables (fast) */
8377 	if (mch_getenv(p + 1) != NULL)
8378 	    n = TRUE;
8379 	else
8380 	{
8381 	    /* try expanding things like $VIM and ${HOME} */
8382 	    p = expand_env_save(p);
8383 	    if (p != NULL && *p != '$')
8384 		n = TRUE;
8385 	    vim_free(p);
8386 	}
8387     }
8388     else if (*p == '&' || *p == '+')			/* option */
8389 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8390     else if (*p == '*')			/* internal or user defined function */
8391     {
8392 	n = function_exists(p + 1);
8393     }
8394     else if (*p == ':')
8395     {
8396 	n = cmd_exists(p + 1);
8397     }
8398     else if (*p == '#')
8399     {
8400 #ifdef FEAT_AUTOCMD
8401 	name = p + 1;
8402 	p = vim_strchr(name, '#');
8403 	if (p != NULL)
8404 	    n = au_exists(name, p, p + 1);
8405 	else
8406 	    n = au_exists(name, name + STRLEN(name), NULL);
8407 #endif
8408     }
8409     else				/* internal variable */
8410     {
8411 	char_u	    *tofree;
8412 	typval_T    tv;
8413 
8414 	/* get_name_len() takes care of expanding curly braces */
8415 	name = p;
8416 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8417 	if (len > 0)
8418 	{
8419 	    if (tofree != NULL)
8420 		name = tofree;
8421 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8422 	    if (n)
8423 	    {
8424 		/* handle d.key, l[idx], f(expr) */
8425 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8426 		if (n)
8427 		    clear_tv(&tv);
8428 	    }
8429 	}
8430 
8431 	vim_free(tofree);
8432     }
8433 
8434     rettv->vval.v_number = n;
8435 }
8436 
8437 /*
8438  * "expand()" function
8439  */
8440     static void
8441 f_expand(argvars, rettv)
8442     typval_T	*argvars;
8443     typval_T	*rettv;
8444 {
8445     char_u	*s;
8446     int		len;
8447     char_u	*errormsg;
8448     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8449     expand_T	xpc;
8450     int		error = FALSE;
8451 
8452     rettv->v_type = VAR_STRING;
8453     s = get_tv_string(&argvars[0]);
8454     if (*s == '%' || *s == '#' || *s == '<')
8455     {
8456 	++emsg_off;
8457 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8458 	--emsg_off;
8459     }
8460     else
8461     {
8462 	/* When the optional second argument is non-zero, don't remove matches
8463 	 * for 'suffixes' and 'wildignore' */
8464 	if (argvars[1].v_type != VAR_UNKNOWN
8465 				    && get_tv_number_chk(&argvars[1], &error))
8466 	    flags |= WILD_KEEP_ALL;
8467 	if (!error)
8468 	{
8469 	    ExpandInit(&xpc);
8470 	    xpc.xp_context = EXPAND_FILES;
8471 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8472 	    ExpandCleanup(&xpc);
8473 	}
8474 	else
8475 	    rettv->vval.v_string = NULL;
8476     }
8477 }
8478 
8479 /*
8480  * "extend(list, list [, idx])" function
8481  * "extend(dict, dict [, action])" function
8482  */
8483     static void
8484 f_extend(argvars, rettv)
8485     typval_T	*argvars;
8486     typval_T	*rettv;
8487 {
8488     rettv->vval.v_number = 0;
8489     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8490     {
8491 	list_T		*l1, *l2;
8492 	listitem_T	*item;
8493 	long		before;
8494 	int		error = FALSE;
8495 
8496 	l1 = argvars[0].vval.v_list;
8497 	l2 = argvars[1].vval.v_list;
8498 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8499 		&& l2 != NULL)
8500 	{
8501 	    if (argvars[2].v_type != VAR_UNKNOWN)
8502 	    {
8503 		before = get_tv_number_chk(&argvars[2], &error);
8504 		if (error)
8505 		    return;		/* type error; errmsg already given */
8506 
8507 		if (before == l1->lv_len)
8508 		    item = NULL;
8509 		else
8510 		{
8511 		    item = list_find(l1, before);
8512 		    if (item == NULL)
8513 		    {
8514 			EMSGN(_(e_listidx), before);
8515 			return;
8516 		    }
8517 		}
8518 	    }
8519 	    else
8520 		item = NULL;
8521 	    list_extend(l1, l2, item);
8522 
8523 	    copy_tv(&argvars[0], rettv);
8524 	}
8525     }
8526     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8527     {
8528 	dict_T		*d1, *d2;
8529 	dictitem_T	*di1;
8530 	char_u		*action;
8531 	int		i;
8532 	hashitem_T	*hi2;
8533 	int		todo;
8534 
8535 	d1 = argvars[0].vval.v_dict;
8536 	d2 = argvars[1].vval.v_dict;
8537 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8538 		&& d2 != NULL)
8539 	{
8540 	    /* Check the third argument. */
8541 	    if (argvars[2].v_type != VAR_UNKNOWN)
8542 	    {
8543 		static char *(av[]) = {"keep", "force", "error"};
8544 
8545 		action = get_tv_string_chk(&argvars[2]);
8546 		if (action == NULL)
8547 		    return;		/* type error; errmsg already given */
8548 		for (i = 0; i < 3; ++i)
8549 		    if (STRCMP(action, av[i]) == 0)
8550 			break;
8551 		if (i == 3)
8552 		{
8553 		    EMSGN(_(e_invarg2), action);
8554 		    return;
8555 		}
8556 	    }
8557 	    else
8558 		action = (char_u *)"force";
8559 
8560 	    /* Go over all entries in the second dict and add them to the
8561 	     * first dict. */
8562 	    todo = d2->dv_hashtab.ht_used;
8563 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8564 	    {
8565 		if (!HASHITEM_EMPTY(hi2))
8566 		{
8567 		    --todo;
8568 		    di1 = dict_find(d1, hi2->hi_key, -1);
8569 		    if (di1 == NULL)
8570 		    {
8571 			di1 = dictitem_copy(HI2DI(hi2));
8572 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8573 			    dictitem_free(di1);
8574 		    }
8575 		    else if (*action == 'e')
8576 		    {
8577 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8578 			break;
8579 		    }
8580 		    else if (*action == 'f')
8581 		    {
8582 			clear_tv(&di1->di_tv);
8583 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8584 		    }
8585 		}
8586 	    }
8587 
8588 	    copy_tv(&argvars[0], rettv);
8589 	}
8590     }
8591     else
8592 	EMSG2(_(e_listdictarg), "extend()");
8593 }
8594 
8595 /*
8596  * "filereadable()" function
8597  */
8598     static void
8599 f_filereadable(argvars, rettv)
8600     typval_T	*argvars;
8601     typval_T	*rettv;
8602 {
8603     FILE	*fd;
8604     char_u	*p;
8605     int		n;
8606 
8607     p = get_tv_string(&argvars[0]);
8608     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8609     {
8610 	n = TRUE;
8611 	fclose(fd);
8612     }
8613     else
8614 	n = FALSE;
8615 
8616     rettv->vval.v_number = n;
8617 }
8618 
8619 /*
8620  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8621  * rights to write into.
8622  */
8623     static void
8624 f_filewritable(argvars, rettv)
8625     typval_T	*argvars;
8626     typval_T	*rettv;
8627 {
8628     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8629 }
8630 
8631 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8632 
8633     static void
8634 findfilendir(argvars, rettv, dir)
8635     typval_T	*argvars;
8636     typval_T	*rettv;
8637     int		dir;
8638 {
8639 #ifdef FEAT_SEARCHPATH
8640     char_u	*fname;
8641     char_u	*fresult = NULL;
8642     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8643     char_u	*p;
8644     char_u	pathbuf[NUMBUFLEN];
8645     int		count = 1;
8646     int		first = TRUE;
8647 
8648     fname = get_tv_string(&argvars[0]);
8649 
8650     if (argvars[1].v_type != VAR_UNKNOWN)
8651     {
8652 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8653 	if (p == NULL)
8654 	    count = -1;	    /* error */
8655 	else
8656 	{
8657 	    if (*p != NUL)
8658 		path = p;
8659 
8660 	    if (argvars[2].v_type != VAR_UNKNOWN)
8661 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8662 	}
8663     }
8664 
8665     if (*fname != NUL && count >= 0)
8666     {
8667 	do
8668 	{
8669 	    vim_free(fresult);
8670 	    fresult = find_file_in_path_option(first ? fname : NULL,
8671 					       first ? (int)STRLEN(fname) : 0,
8672 					       0, first, path, dir, NULL);
8673 	    first = FALSE;
8674 	} while (--count > 0 && fresult != NULL);
8675     }
8676 
8677     rettv->vval.v_string = fresult;
8678 #else
8679     rettv->vval.v_string = NULL;
8680 #endif
8681     rettv->v_type = VAR_STRING;
8682 }
8683 
8684 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8685 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8686 
8687 /*
8688  * Implementation of map() and filter().
8689  */
8690     static void
8691 filter_map(argvars, rettv, map)
8692     typval_T	*argvars;
8693     typval_T	*rettv;
8694     int		map;
8695 {
8696     char_u	buf[NUMBUFLEN];
8697     char_u	*expr;
8698     listitem_T	*li, *nli;
8699     list_T	*l = NULL;
8700     dictitem_T	*di;
8701     hashtab_T	*ht;
8702     hashitem_T	*hi;
8703     dict_T	*d = NULL;
8704     typval_T	save_val;
8705     typval_T	save_key;
8706     int		rem;
8707     int		todo;
8708     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8709 
8710 
8711     rettv->vval.v_number = 0;
8712     if (argvars[0].v_type == VAR_LIST)
8713     {
8714 	if ((l = argvars[0].vval.v_list) == NULL
8715 		|| (map && tv_check_lock(l->lv_lock, msg)))
8716 	    return;
8717     }
8718     else if (argvars[0].v_type == VAR_DICT)
8719     {
8720 	if ((d = argvars[0].vval.v_dict) == NULL
8721 		|| (map && tv_check_lock(d->dv_lock, msg)))
8722 	    return;
8723     }
8724     else
8725     {
8726 	EMSG2(_(e_listdictarg), msg);
8727 	return;
8728     }
8729 
8730     expr = get_tv_string_buf_chk(&argvars[1], buf);
8731     /* On type errors, the preceding call has already displayed an error
8732      * message.  Avoid a misleading error message for an empty string that
8733      * was not passed as argument. */
8734     if (expr != NULL)
8735     {
8736 	prepare_vimvar(VV_VAL, &save_val);
8737 	expr = skipwhite(expr);
8738 
8739 	if (argvars[0].v_type == VAR_DICT)
8740 	{
8741 	    prepare_vimvar(VV_KEY, &save_key);
8742 	    vimvars[VV_KEY].vv_type = VAR_STRING;
8743 
8744 	    ht = &d->dv_hashtab;
8745 	    hash_lock(ht);
8746 	    todo = ht->ht_used;
8747 	    for (hi = ht->ht_array; todo > 0; ++hi)
8748 	    {
8749 		if (!HASHITEM_EMPTY(hi))
8750 		{
8751 		    --todo;
8752 		    di = HI2DI(hi);
8753 		    if (tv_check_lock(di->di_tv.v_lock, msg))
8754 			break;
8755 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
8756 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL)
8757 			break;
8758 		    if (!map && rem)
8759 			dictitem_remove(d, di);
8760 		    clear_tv(&vimvars[VV_KEY].vv_tv);
8761 		}
8762 	    }
8763 	    hash_unlock(ht);
8764 
8765 	    restore_vimvar(VV_KEY, &save_key);
8766 	}
8767 	else
8768 	{
8769 	    for (li = l->lv_first; li != NULL; li = nli)
8770 	    {
8771 		if (tv_check_lock(li->li_tv.v_lock, msg))
8772 		    break;
8773 		nli = li->li_next;
8774 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL)
8775 		    break;
8776 		if (!map && rem)
8777 		    listitem_remove(l, li);
8778 	    }
8779 	}
8780 
8781 	restore_vimvar(VV_VAL, &save_val);
8782     }
8783 
8784     copy_tv(&argvars[0], rettv);
8785 }
8786 
8787     static int
8788 filter_map_one(tv, expr, map, remp)
8789     typval_T	*tv;
8790     char_u	*expr;
8791     int		map;
8792     int		*remp;
8793 {
8794     typval_T	rettv;
8795     char_u	*s;
8796 
8797     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
8798     s = expr;
8799     if (eval1(&s, &rettv, TRUE) == FAIL)
8800 	return FAIL;
8801     if (*s != NUL)  /* check for trailing chars after expr */
8802     {
8803 	EMSG2(_(e_invexpr2), s);
8804 	return FAIL;
8805     }
8806     if (map)
8807     {
8808 	/* map(): replace the list item value */
8809 	clear_tv(tv);
8810 	*tv = rettv;
8811     }
8812     else
8813     {
8814 	int	    error = FALSE;
8815 
8816 	/* filter(): when expr is zero remove the item */
8817 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
8818 	clear_tv(&rettv);
8819 	/* On type error, nothing has been removed; return FAIL to stop the
8820 	 * loop.  The error message was given by get_tv_number_chk(). */
8821 	if (error)
8822 	    return FAIL;
8823     }
8824     clear_tv(&vimvars[VV_VAL].vv_tv);
8825     return OK;
8826 }
8827 
8828 /*
8829  * "filter()" function
8830  */
8831     static void
8832 f_filter(argvars, rettv)
8833     typval_T	*argvars;
8834     typval_T	*rettv;
8835 {
8836     filter_map(argvars, rettv, FALSE);
8837 }
8838 
8839 /*
8840  * "finddir({fname}[, {path}[, {count}]])" function
8841  */
8842     static void
8843 f_finddir(argvars, rettv)
8844     typval_T	*argvars;
8845     typval_T	*rettv;
8846 {
8847     findfilendir(argvars, rettv, TRUE);
8848 }
8849 
8850 /*
8851  * "findfile({fname}[, {path}[, {count}]])" function
8852  */
8853     static void
8854 f_findfile(argvars, rettv)
8855     typval_T	*argvars;
8856     typval_T	*rettv;
8857 {
8858     findfilendir(argvars, rettv, FALSE);
8859 }
8860 
8861 /*
8862  * "fnamemodify({fname}, {mods})" function
8863  */
8864     static void
8865 f_fnamemodify(argvars, rettv)
8866     typval_T	*argvars;
8867     typval_T	*rettv;
8868 {
8869     char_u	*fname;
8870     char_u	*mods;
8871     int		usedlen = 0;
8872     int		len;
8873     char_u	*fbuf = NULL;
8874     char_u	buf[NUMBUFLEN];
8875 
8876     fname = get_tv_string_chk(&argvars[0]);
8877     mods = get_tv_string_buf_chk(&argvars[1], buf);
8878     if (fname == NULL || mods == NULL)
8879 	fname = NULL;
8880     else
8881     {
8882 	len = (int)STRLEN(fname);
8883 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
8884     }
8885 
8886     rettv->v_type = VAR_STRING;
8887     if (fname == NULL)
8888 	rettv->vval.v_string = NULL;
8889     else
8890 	rettv->vval.v_string = vim_strnsave(fname, len);
8891     vim_free(fbuf);
8892 }
8893 
8894 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
8895 
8896 /*
8897  * "foldclosed()" function
8898  */
8899     static void
8900 foldclosed_both(argvars, rettv, end)
8901     typval_T	*argvars;
8902     typval_T	*rettv;
8903     int		end;
8904 {
8905 #ifdef FEAT_FOLDING
8906     linenr_T	lnum;
8907     linenr_T	first, last;
8908 
8909     lnum = get_tv_lnum(argvars);
8910     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8911     {
8912 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
8913 	{
8914 	    if (end)
8915 		rettv->vval.v_number = (varnumber_T)last;
8916 	    else
8917 		rettv->vval.v_number = (varnumber_T)first;
8918 	    return;
8919 	}
8920     }
8921 #endif
8922     rettv->vval.v_number = -1;
8923 }
8924 
8925 /*
8926  * "foldclosed()" function
8927  */
8928     static void
8929 f_foldclosed(argvars, rettv)
8930     typval_T	*argvars;
8931     typval_T	*rettv;
8932 {
8933     foldclosed_both(argvars, rettv, FALSE);
8934 }
8935 
8936 /*
8937  * "foldclosedend()" function
8938  */
8939     static void
8940 f_foldclosedend(argvars, rettv)
8941     typval_T	*argvars;
8942     typval_T	*rettv;
8943 {
8944     foldclosed_both(argvars, rettv, TRUE);
8945 }
8946 
8947 /*
8948  * "foldlevel()" function
8949  */
8950     static void
8951 f_foldlevel(argvars, rettv)
8952     typval_T	*argvars;
8953     typval_T	*rettv;
8954 {
8955 #ifdef FEAT_FOLDING
8956     linenr_T	lnum;
8957 
8958     lnum = get_tv_lnum(argvars);
8959     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8960 	rettv->vval.v_number = foldLevel(lnum);
8961     else
8962 #endif
8963 	rettv->vval.v_number = 0;
8964 }
8965 
8966 /*
8967  * "foldtext()" function
8968  */
8969 /*ARGSUSED*/
8970     static void
8971 f_foldtext(argvars, rettv)
8972     typval_T	*argvars;
8973     typval_T	*rettv;
8974 {
8975 #ifdef FEAT_FOLDING
8976     linenr_T	lnum;
8977     char_u	*s;
8978     char_u	*r;
8979     int		len;
8980     char	*txt;
8981 #endif
8982 
8983     rettv->v_type = VAR_STRING;
8984     rettv->vval.v_string = NULL;
8985 #ifdef FEAT_FOLDING
8986     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
8987 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
8988 						 <= curbuf->b_ml.ml_line_count
8989 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
8990     {
8991 	/* Find first non-empty line in the fold. */
8992 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
8993 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8994 	{
8995 	    if (!linewhite(lnum))
8996 		break;
8997 	    ++lnum;
8998 	}
8999 
9000 	/* Find interesting text in this line. */
9001 	s = skipwhite(ml_get(lnum));
9002 	/* skip C comment-start */
9003 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9004 	{
9005 	    s = skipwhite(s + 2);
9006 	    if (*skipwhite(s) == NUL
9007 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9008 	    {
9009 		s = skipwhite(ml_get(lnum + 1));
9010 		if (*s == '*')
9011 		    s = skipwhite(s + 1);
9012 	    }
9013 	}
9014 	txt = _("+-%s%3ld lines: ");
9015 	r = alloc((unsigned)(STRLEN(txt)
9016 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9017 		    + 20				    /* for %3ld */
9018 		    + STRLEN(s)));			    /* concatenated */
9019 	if (r != NULL)
9020 	{
9021 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9022 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9023 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9024 	    len = (int)STRLEN(r);
9025 	    STRCAT(r, s);
9026 	    /* remove 'foldmarker' and 'commentstring' */
9027 	    foldtext_cleanup(r + len);
9028 	    rettv->vval.v_string = r;
9029 	}
9030     }
9031 #endif
9032 }
9033 
9034 /*
9035  * "foldtextresult(lnum)" function
9036  */
9037 /*ARGSUSED*/
9038     static void
9039 f_foldtextresult(argvars, rettv)
9040     typval_T	*argvars;
9041     typval_T	*rettv;
9042 {
9043 #ifdef FEAT_FOLDING
9044     linenr_T	lnum;
9045     char_u	*text;
9046     char_u	buf[51];
9047     foldinfo_T  foldinfo;
9048     int		fold_count;
9049 #endif
9050 
9051     rettv->v_type = VAR_STRING;
9052     rettv->vval.v_string = NULL;
9053 #ifdef FEAT_FOLDING
9054     lnum = get_tv_lnum(argvars);
9055     /* treat illegal types and illegal string values for {lnum} the same */
9056     if (lnum < 0)
9057 	lnum = 0;
9058     fold_count = foldedCount(curwin, lnum, &foldinfo);
9059     if (fold_count > 0)
9060     {
9061 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9062 							      &foldinfo, buf);
9063 	if (text == buf)
9064 	    text = vim_strsave(text);
9065 	rettv->vval.v_string = text;
9066     }
9067 #endif
9068 }
9069 
9070 /*
9071  * "foreground()" function
9072  */
9073 /*ARGSUSED*/
9074     static void
9075 f_foreground(argvars, rettv)
9076     typval_T	*argvars;
9077     typval_T	*rettv;
9078 {
9079     rettv->vval.v_number = 0;
9080 #ifdef FEAT_GUI
9081     if (gui.in_use)
9082 	gui_mch_set_foreground();
9083 #else
9084 # ifdef WIN32
9085     win32_set_foreground();
9086 # endif
9087 #endif
9088 }
9089 
9090 /*
9091  * "function()" function
9092  */
9093 /*ARGSUSED*/
9094     static void
9095 f_function(argvars, rettv)
9096     typval_T	*argvars;
9097     typval_T	*rettv;
9098 {
9099     char_u	*s;
9100 
9101     rettv->vval.v_number = 0;
9102     s = get_tv_string(&argvars[0]);
9103     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9104 	EMSG2(_(e_invarg2), s);
9105     else if (!function_exists(s))
9106 	EMSG2(_("E700: Unknown function: %s"), s);
9107     else
9108     {
9109 	rettv->vval.v_string = vim_strsave(s);
9110 	rettv->v_type = VAR_FUNC;
9111     }
9112 }
9113 
9114 /*
9115  * "garbagecollect()" function
9116  */
9117 /*ARGSUSED*/
9118     static void
9119 f_garbagecollect(argvars, rettv)
9120     typval_T	*argvars;
9121     typval_T	*rettv;
9122 {
9123     garbage_collect();
9124 }
9125 
9126 /*
9127  * "get()" function
9128  */
9129     static void
9130 f_get(argvars, rettv)
9131     typval_T	*argvars;
9132     typval_T	*rettv;
9133 {
9134     listitem_T	*li;
9135     list_T	*l;
9136     dictitem_T	*di;
9137     dict_T	*d;
9138     typval_T	*tv = NULL;
9139 
9140     if (argvars[0].v_type == VAR_LIST)
9141     {
9142 	if ((l = argvars[0].vval.v_list) != NULL)
9143 	{
9144 	    int		error = FALSE;
9145 
9146 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9147 	    if (!error && li != NULL)
9148 		tv = &li->li_tv;
9149 	}
9150     }
9151     else if (argvars[0].v_type == VAR_DICT)
9152     {
9153 	if ((d = argvars[0].vval.v_dict) != NULL)
9154 	{
9155 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9156 	    if (di != NULL)
9157 		tv = &di->di_tv;
9158 	}
9159     }
9160     else
9161 	EMSG2(_(e_listdictarg), "get()");
9162 
9163     if (tv == NULL)
9164     {
9165 	if (argvars[2].v_type == VAR_UNKNOWN)
9166 	    rettv->vval.v_number = 0;
9167 	else
9168 	    copy_tv(&argvars[2], rettv);
9169     }
9170     else
9171 	copy_tv(tv, rettv);
9172 }
9173 
9174 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9175 
9176 /*
9177  * Get line or list of lines from buffer "buf" into "rettv".
9178  * Return a range (from start to end) of lines in rettv from the specified
9179  * buffer.
9180  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9181  */
9182     static void
9183 get_buffer_lines(buf, start, end, retlist, rettv)
9184     buf_T	*buf;
9185     linenr_T	start;
9186     linenr_T	end;
9187     int		retlist;
9188     typval_T	*rettv;
9189 {
9190     char_u	*p;
9191     list_T	*l = NULL;
9192     listitem_T	*li;
9193 
9194     if (retlist)
9195     {
9196 	l = list_alloc();
9197 	if (l == NULL)
9198 	    return;
9199 
9200 	rettv->vval.v_list = l;
9201 	rettv->v_type = VAR_LIST;
9202 	++l->lv_refcount;
9203     }
9204     else
9205 	rettv->vval.v_number = 0;
9206 
9207     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9208 	return;
9209 
9210     if (!retlist)
9211     {
9212 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9213 	    p = ml_get_buf(buf, start, FALSE);
9214 	else
9215 	    p = (char_u *)"";
9216 
9217 	rettv->v_type = VAR_STRING;
9218 	rettv->vval.v_string = vim_strsave(p);
9219     }
9220     else
9221     {
9222 	if (end < start)
9223 	    return;
9224 
9225 	if (start < 1)
9226 	    start = 1;
9227 	if (end > buf->b_ml.ml_line_count)
9228 	    end = buf->b_ml.ml_line_count;
9229 	while (start <= end)
9230 	{
9231 	    li = listitem_alloc();
9232 	    if (li == NULL)
9233 		break;
9234 	    list_append(l, li);
9235 	    li->li_tv.v_type = VAR_STRING;
9236 	    li->li_tv.v_lock = 0;
9237 	    li->li_tv.vval.v_string =
9238 		vim_strsave(ml_get_buf(buf, start++, FALSE));
9239 	}
9240     }
9241 }
9242 
9243 /*
9244  * "getbufline()" function
9245  */
9246     static void
9247 f_getbufline(argvars, rettv)
9248     typval_T	*argvars;
9249     typval_T	*rettv;
9250 {
9251     linenr_T	lnum;
9252     linenr_T	end;
9253     buf_T	*buf;
9254 
9255     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9256     ++emsg_off;
9257     buf = get_buf_tv(&argvars[0]);
9258     --emsg_off;
9259 
9260     lnum = get_tv_lnum_buf(&argvars[1], buf);
9261     if (argvars[2].v_type == VAR_UNKNOWN)
9262 	end = lnum;
9263     else
9264 	end = get_tv_lnum_buf(&argvars[2], buf);
9265 
9266     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9267 }
9268 
9269 /*
9270  * "getbufvar()" function
9271  */
9272     static void
9273 f_getbufvar(argvars, rettv)
9274     typval_T	*argvars;
9275     typval_T	*rettv;
9276 {
9277     buf_T	*buf;
9278     buf_T	*save_curbuf;
9279     char_u	*varname;
9280     dictitem_T	*v;
9281 
9282     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9283     varname = get_tv_string_chk(&argvars[1]);
9284     ++emsg_off;
9285     buf = get_buf_tv(&argvars[0]);
9286 
9287     rettv->v_type = VAR_STRING;
9288     rettv->vval.v_string = NULL;
9289 
9290     if (buf != NULL && varname != NULL)
9291     {
9292 	if (*varname == '&')	/* buffer-local-option */
9293 	{
9294 	    /* set curbuf to be our buf, temporarily */
9295 	    save_curbuf = curbuf;
9296 	    curbuf = buf;
9297 
9298 	    get_option_tv(&varname, rettv, TRUE);
9299 
9300 	    /* restore previous notion of curbuf */
9301 	    curbuf = save_curbuf;
9302 	}
9303 	else
9304 	{
9305 	    if (*varname == NUL)
9306 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9307 		 * scope prefix before the NUL byte is required by
9308 		 * find_var_in_ht(). */
9309 		varname = (char_u *)"b:" + 2;
9310 	    /* look up the variable */
9311 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9312 	    if (v != NULL)
9313 		copy_tv(&v->di_tv, rettv);
9314 	}
9315     }
9316 
9317     --emsg_off;
9318 }
9319 
9320 /*
9321  * "getchar()" function
9322  */
9323     static void
9324 f_getchar(argvars, rettv)
9325     typval_T	*argvars;
9326     typval_T	*rettv;
9327 {
9328     varnumber_T		n;
9329     int			error = FALSE;
9330 
9331     ++no_mapping;
9332     ++allow_keys;
9333     if (argvars[0].v_type == VAR_UNKNOWN)
9334 	/* getchar(): blocking wait. */
9335 	n = safe_vgetc();
9336     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9337 	/* getchar(1): only check if char avail */
9338 	n = vpeekc();
9339     else if (error || vpeekc() == NUL)
9340 	/* illegal argument or getchar(0) and no char avail: return zero */
9341 	n = 0;
9342     else
9343 	/* getchar(0) and char avail: return char */
9344 	n = safe_vgetc();
9345     --no_mapping;
9346     --allow_keys;
9347 
9348     rettv->vval.v_number = n;
9349     if (IS_SPECIAL(n) || mod_mask != 0)
9350     {
9351 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9352 	int		i = 0;
9353 
9354 	/* Turn a special key into three bytes, plus modifier. */
9355 	if (mod_mask != 0)
9356 	{
9357 	    temp[i++] = K_SPECIAL;
9358 	    temp[i++] = KS_MODIFIER;
9359 	    temp[i++] = mod_mask;
9360 	}
9361 	if (IS_SPECIAL(n))
9362 	{
9363 	    temp[i++] = K_SPECIAL;
9364 	    temp[i++] = K_SECOND(n);
9365 	    temp[i++] = K_THIRD(n);
9366 	}
9367 #ifdef FEAT_MBYTE
9368 	else if (has_mbyte)
9369 	    i += (*mb_char2bytes)(n, temp + i);
9370 #endif
9371 	else
9372 	    temp[i++] = n;
9373 	temp[i++] = NUL;
9374 	rettv->v_type = VAR_STRING;
9375 	rettv->vval.v_string = vim_strsave(temp);
9376     }
9377 }
9378 
9379 /*
9380  * "getcharmod()" function
9381  */
9382 /*ARGSUSED*/
9383     static void
9384 f_getcharmod(argvars, rettv)
9385     typval_T	*argvars;
9386     typval_T	*rettv;
9387 {
9388     rettv->vval.v_number = mod_mask;
9389 }
9390 
9391 /*
9392  * "getcmdline()" function
9393  */
9394 /*ARGSUSED*/
9395     static void
9396 f_getcmdline(argvars, rettv)
9397     typval_T	*argvars;
9398     typval_T	*rettv;
9399 {
9400     rettv->v_type = VAR_STRING;
9401     rettv->vval.v_string = get_cmdline_str();
9402 }
9403 
9404 /*
9405  * "getcmdpos()" function
9406  */
9407 /*ARGSUSED*/
9408     static void
9409 f_getcmdpos(argvars, rettv)
9410     typval_T	*argvars;
9411     typval_T	*rettv;
9412 {
9413     rettv->vval.v_number = get_cmdline_pos() + 1;
9414 }
9415 
9416 /*
9417  * "getcwd()" function
9418  */
9419 /*ARGSUSED*/
9420     static void
9421 f_getcwd(argvars, rettv)
9422     typval_T	*argvars;
9423     typval_T	*rettv;
9424 {
9425     char_u	cwd[MAXPATHL];
9426 
9427     rettv->v_type = VAR_STRING;
9428     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9429 	rettv->vval.v_string = NULL;
9430     else
9431     {
9432 	rettv->vval.v_string = vim_strsave(cwd);
9433 #ifdef BACKSLASH_IN_FILENAME
9434 	if (rettv->vval.v_string != NULL)
9435 	    slash_adjust(rettv->vval.v_string);
9436 #endif
9437     }
9438 }
9439 
9440 /*
9441  * "getfontname()" function
9442  */
9443 /*ARGSUSED*/
9444     static void
9445 f_getfontname(argvars, rettv)
9446     typval_T	*argvars;
9447     typval_T	*rettv;
9448 {
9449     rettv->v_type = VAR_STRING;
9450     rettv->vval.v_string = NULL;
9451 #ifdef FEAT_GUI
9452     if (gui.in_use)
9453     {
9454 	GuiFont font;
9455 	char_u	*name = NULL;
9456 
9457 	if (argvars[0].v_type == VAR_UNKNOWN)
9458 	{
9459 	    /* Get the "Normal" font.  Either the name saved by
9460 	     * hl_set_font_name() or from the font ID. */
9461 	    font = gui.norm_font;
9462 	    name = hl_get_font_name();
9463 	}
9464 	else
9465 	{
9466 	    name = get_tv_string(&argvars[0]);
9467 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9468 		return;
9469 	    font = gui_mch_get_font(name, FALSE);
9470 	    if (font == NOFONT)
9471 		return;	    /* Invalid font name, return empty string. */
9472 	}
9473 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9474 	if (argvars[0].v_type != VAR_UNKNOWN)
9475 	    gui_mch_free_font(font);
9476     }
9477 #endif
9478 }
9479 
9480 /*
9481  * "getfperm({fname})" function
9482  */
9483     static void
9484 f_getfperm(argvars, rettv)
9485     typval_T	*argvars;
9486     typval_T	*rettv;
9487 {
9488     char_u	*fname;
9489     struct stat st;
9490     char_u	*perm = NULL;
9491     char_u	flags[] = "rwx";
9492     int		i;
9493 
9494     fname = get_tv_string(&argvars[0]);
9495 
9496     rettv->v_type = VAR_STRING;
9497     if (mch_stat((char *)fname, &st) >= 0)
9498     {
9499 	perm = vim_strsave((char_u *)"---------");
9500 	if (perm != NULL)
9501 	{
9502 	    for (i = 0; i < 9; i++)
9503 	    {
9504 		if (st.st_mode & (1 << (8 - i)))
9505 		    perm[i] = flags[i % 3];
9506 	    }
9507 	}
9508     }
9509     rettv->vval.v_string = perm;
9510 }
9511 
9512 /*
9513  * "getfsize({fname})" function
9514  */
9515     static void
9516 f_getfsize(argvars, rettv)
9517     typval_T	*argvars;
9518     typval_T	*rettv;
9519 {
9520     char_u	*fname;
9521     struct stat	st;
9522 
9523     fname = get_tv_string(&argvars[0]);
9524 
9525     rettv->v_type = VAR_NUMBER;
9526 
9527     if (mch_stat((char *)fname, &st) >= 0)
9528     {
9529 	if (mch_isdir(fname))
9530 	    rettv->vval.v_number = 0;
9531 	else
9532 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9533     }
9534     else
9535 	  rettv->vval.v_number = -1;
9536 }
9537 
9538 /*
9539  * "getftime({fname})" function
9540  */
9541     static void
9542 f_getftime(argvars, rettv)
9543     typval_T	*argvars;
9544     typval_T	*rettv;
9545 {
9546     char_u	*fname;
9547     struct stat	st;
9548 
9549     fname = get_tv_string(&argvars[0]);
9550 
9551     if (mch_stat((char *)fname, &st) >= 0)
9552 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9553     else
9554 	rettv->vval.v_number = -1;
9555 }
9556 
9557 /*
9558  * "getftype({fname})" function
9559  */
9560     static void
9561 f_getftype(argvars, rettv)
9562     typval_T	*argvars;
9563     typval_T	*rettv;
9564 {
9565     char_u	*fname;
9566     struct stat st;
9567     char_u	*type = NULL;
9568     char	*t;
9569 
9570     fname = get_tv_string(&argvars[0]);
9571 
9572     rettv->v_type = VAR_STRING;
9573     if (mch_lstat((char *)fname, &st) >= 0)
9574     {
9575 #ifdef S_ISREG
9576 	if (S_ISREG(st.st_mode))
9577 	    t = "file";
9578 	else if (S_ISDIR(st.st_mode))
9579 	    t = "dir";
9580 # ifdef S_ISLNK
9581 	else if (S_ISLNK(st.st_mode))
9582 	    t = "link";
9583 # endif
9584 # ifdef S_ISBLK
9585 	else if (S_ISBLK(st.st_mode))
9586 	    t = "bdev";
9587 # endif
9588 # ifdef S_ISCHR
9589 	else if (S_ISCHR(st.st_mode))
9590 	    t = "cdev";
9591 # endif
9592 # ifdef S_ISFIFO
9593 	else if (S_ISFIFO(st.st_mode))
9594 	    t = "fifo";
9595 # endif
9596 # ifdef S_ISSOCK
9597 	else if (S_ISSOCK(st.st_mode))
9598 	    t = "fifo";
9599 # endif
9600 	else
9601 	    t = "other";
9602 #else
9603 # ifdef S_IFMT
9604 	switch (st.st_mode & S_IFMT)
9605 	{
9606 	    case S_IFREG: t = "file"; break;
9607 	    case S_IFDIR: t = "dir"; break;
9608 #  ifdef S_IFLNK
9609 	    case S_IFLNK: t = "link"; break;
9610 #  endif
9611 #  ifdef S_IFBLK
9612 	    case S_IFBLK: t = "bdev"; break;
9613 #  endif
9614 #  ifdef S_IFCHR
9615 	    case S_IFCHR: t = "cdev"; break;
9616 #  endif
9617 #  ifdef S_IFIFO
9618 	    case S_IFIFO: t = "fifo"; break;
9619 #  endif
9620 #  ifdef S_IFSOCK
9621 	    case S_IFSOCK: t = "socket"; break;
9622 #  endif
9623 	    default: t = "other";
9624 	}
9625 # else
9626 	if (mch_isdir(fname))
9627 	    t = "dir";
9628 	else
9629 	    t = "file";
9630 # endif
9631 #endif
9632 	type = vim_strsave((char_u *)t);
9633     }
9634     rettv->vval.v_string = type;
9635 }
9636 
9637 /*
9638  * "getline(lnum, [end])" function
9639  */
9640     static void
9641 f_getline(argvars, rettv)
9642     typval_T	*argvars;
9643     typval_T	*rettv;
9644 {
9645     linenr_T	lnum;
9646     linenr_T	end;
9647     int		retlist;
9648 
9649     lnum = get_tv_lnum(argvars);
9650     if (argvars[1].v_type == VAR_UNKNOWN)
9651     {
9652 	end = 0;
9653 	retlist = FALSE;
9654     }
9655     else
9656     {
9657 	end = get_tv_lnum(&argvars[1]);
9658 	retlist = TRUE;
9659     }
9660 
9661     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9662 }
9663 
9664 /*
9665  * "getqflist()" function
9666  */
9667 /*ARGSUSED*/
9668     static void
9669 f_getqflist(argvars, rettv)
9670     typval_T	*argvars;
9671     typval_T	*rettv;
9672 {
9673 #ifdef FEAT_QUICKFIX
9674     list_T	*l;
9675 #endif
9676 
9677     rettv->vval.v_number = FALSE;
9678 #ifdef FEAT_QUICKFIX
9679     l = list_alloc();
9680     if (l != NULL)
9681     {
9682 	if (get_errorlist(l) != FAIL)
9683 	{
9684 	    rettv->vval.v_list = l;
9685 	    rettv->v_type = VAR_LIST;
9686 	    ++l->lv_refcount;
9687 	}
9688 	else
9689 	    list_free(l);
9690     }
9691 #endif
9692 }
9693 
9694 /*
9695  * "getreg()" function
9696  */
9697     static void
9698 f_getreg(argvars, rettv)
9699     typval_T	*argvars;
9700     typval_T	*rettv;
9701 {
9702     char_u	*strregname;
9703     int		regname;
9704     int		arg2 = FALSE;
9705     int		error = FALSE;
9706 
9707     if (argvars[0].v_type != VAR_UNKNOWN)
9708     {
9709 	strregname = get_tv_string_chk(&argvars[0]);
9710 	error = strregname == NULL;
9711 	if (argvars[1].v_type != VAR_UNKNOWN)
9712 	    arg2 = get_tv_number_chk(&argvars[1], &error);
9713     }
9714     else
9715 	strregname = vimvars[VV_REG].vv_str;
9716     regname = (strregname == NULL ? '"' : *strregname);
9717     if (regname == 0)
9718 	regname = '"';
9719 
9720     rettv->v_type = VAR_STRING;
9721     rettv->vval.v_string = error ? NULL :
9722 				    get_reg_contents(regname, TRUE, arg2);
9723 }
9724 
9725 /*
9726  * "getregtype()" function
9727  */
9728     static void
9729 f_getregtype(argvars, rettv)
9730     typval_T	*argvars;
9731     typval_T	*rettv;
9732 {
9733     char_u	*strregname;
9734     int		regname;
9735     char_u	buf[NUMBUFLEN + 2];
9736     long	reglen = 0;
9737 
9738     if (argvars[0].v_type != VAR_UNKNOWN)
9739     {
9740 	strregname = get_tv_string_chk(&argvars[0]);
9741 	if (strregname == NULL)	    /* type error; errmsg already given */
9742 	{
9743 	    rettv->v_type = VAR_STRING;
9744 	    rettv->vval.v_string = NULL;
9745 	    return;
9746 	}
9747     }
9748     else
9749 	/* Default to v:register */
9750 	strregname = vimvars[VV_REG].vv_str;
9751 
9752     regname = (strregname == NULL ? '"' : *strregname);
9753     if (regname == 0)
9754 	regname = '"';
9755 
9756     buf[0] = NUL;
9757     buf[1] = NUL;
9758     switch (get_reg_type(regname, &reglen))
9759     {
9760 	case MLINE: buf[0] = 'V'; break;
9761 	case MCHAR: buf[0] = 'v'; break;
9762 #ifdef FEAT_VISUAL
9763 	case MBLOCK:
9764 		buf[0] = Ctrl_V;
9765 		sprintf((char *)buf + 1, "%ld", reglen + 1);
9766 		break;
9767 #endif
9768     }
9769     rettv->v_type = VAR_STRING;
9770     rettv->vval.v_string = vim_strsave(buf);
9771 }
9772 
9773 /*
9774  * "getwinposx()" function
9775  */
9776 /*ARGSUSED*/
9777     static void
9778 f_getwinposx(argvars, rettv)
9779     typval_T	*argvars;
9780     typval_T	*rettv;
9781 {
9782     rettv->vval.v_number = -1;
9783 #ifdef FEAT_GUI
9784     if (gui.in_use)
9785     {
9786 	int	    x, y;
9787 
9788 	if (gui_mch_get_winpos(&x, &y) == OK)
9789 	    rettv->vval.v_number = x;
9790     }
9791 #endif
9792 }
9793 
9794 /*
9795  * "getwinposy()" function
9796  */
9797 /*ARGSUSED*/
9798     static void
9799 f_getwinposy(argvars, rettv)
9800     typval_T	*argvars;
9801     typval_T	*rettv;
9802 {
9803     rettv->vval.v_number = -1;
9804 #ifdef FEAT_GUI
9805     if (gui.in_use)
9806     {
9807 	int	    x, y;
9808 
9809 	if (gui_mch_get_winpos(&x, &y) == OK)
9810 	    rettv->vval.v_number = y;
9811     }
9812 #endif
9813 }
9814 
9815 static win_T *find_win_by_nr __ARGS((typval_T *vp));
9816 
9817     static win_T *
9818 find_win_by_nr(vp)
9819     typval_T	*vp;
9820 {
9821 #ifdef FEAT_WINDOWS
9822     win_T	*wp;
9823 #endif
9824     int		nr;
9825 
9826     nr = get_tv_number_chk(vp, NULL);
9827 
9828 #ifdef FEAT_WINDOWS
9829     if (nr < 0)
9830 	return NULL;
9831     if (nr == 0)
9832 	return curwin;
9833 
9834     for (wp = firstwin; wp != NULL; wp = wp->w_next)
9835 	if (--nr <= 0)
9836 	    break;
9837     return wp;
9838 #else
9839     if (nr == 0 || nr == 1)
9840 	return curwin;
9841     return NULL;
9842 #endif
9843 }
9844 
9845 /*
9846  * "getwinvar()" function
9847  */
9848     static void
9849 f_getwinvar(argvars, rettv)
9850     typval_T	*argvars;
9851     typval_T	*rettv;
9852 {
9853     win_T	*win, *oldcurwin;
9854     char_u	*varname;
9855     dictitem_T	*v;
9856 
9857     win = find_win_by_nr(&argvars[0]);
9858     varname = get_tv_string_chk(&argvars[1]);
9859     ++emsg_off;
9860 
9861     rettv->v_type = VAR_STRING;
9862     rettv->vval.v_string = NULL;
9863 
9864     if (win != NULL && varname != NULL)
9865     {
9866 	if (*varname == '&')	/* window-local-option */
9867 	{
9868 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
9869 	     * that we can get buffer-local options. */
9870 	    oldcurwin = curwin;
9871 	    curwin = win;
9872 	    curbuf = win->w_buffer;
9873 
9874 	    get_option_tv(&varname, rettv, 1);
9875 
9876 	    /* restore previous notion of curwin */
9877 	    curwin = oldcurwin;
9878 	    curbuf = curwin->w_buffer;
9879 	}
9880 	else
9881 	{
9882 	    if (*varname == NUL)
9883 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
9884 		 * scope prefix before the NUL byte is required by
9885 		 * find_var_in_ht(). */
9886 		varname = (char_u *)"w:" + 2;
9887 	    /* look up the variable */
9888 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
9889 	    if (v != NULL)
9890 		copy_tv(&v->di_tv, rettv);
9891 	}
9892     }
9893 
9894     --emsg_off;
9895 }
9896 
9897 /*
9898  * "glob()" function
9899  */
9900     static void
9901 f_glob(argvars, rettv)
9902     typval_T	*argvars;
9903     typval_T	*rettv;
9904 {
9905     expand_T	xpc;
9906 
9907     ExpandInit(&xpc);
9908     xpc.xp_context = EXPAND_FILES;
9909     rettv->v_type = VAR_STRING;
9910     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
9911 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
9912     ExpandCleanup(&xpc);
9913 }
9914 
9915 /*
9916  * "globpath()" function
9917  */
9918     static void
9919 f_globpath(argvars, rettv)
9920     typval_T	*argvars;
9921     typval_T	*rettv;
9922 {
9923     char_u	buf1[NUMBUFLEN];
9924     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
9925 
9926     rettv->v_type = VAR_STRING;
9927     if (file == NULL)
9928 	rettv->vval.v_string = NULL;
9929     else
9930 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
9931 }
9932 
9933 /*
9934  * "has()" function
9935  */
9936     static void
9937 f_has(argvars, rettv)
9938     typval_T	*argvars;
9939     typval_T	*rettv;
9940 {
9941     int		i;
9942     char_u	*name;
9943     int		n = FALSE;
9944     static char	*(has_list[]) =
9945     {
9946 #ifdef AMIGA
9947 	"amiga",
9948 # ifdef FEAT_ARP
9949 	"arp",
9950 # endif
9951 #endif
9952 #ifdef __BEOS__
9953 	"beos",
9954 #endif
9955 #ifdef MSDOS
9956 # ifdef DJGPP
9957 	"dos32",
9958 # else
9959 	"dos16",
9960 # endif
9961 #endif
9962 #ifdef MACOS /* TODO: Should we add MACOS_CLASSIC, MACOS_X? (Dany) */
9963 	"mac",
9964 #endif
9965 #if defined(MACOS_X_UNIX)
9966 	"macunix",
9967 #endif
9968 #ifdef OS2
9969 	"os2",
9970 #endif
9971 #ifdef __QNX__
9972 	"qnx",
9973 #endif
9974 #ifdef RISCOS
9975 	"riscos",
9976 #endif
9977 #ifdef UNIX
9978 	"unix",
9979 #endif
9980 #ifdef VMS
9981 	"vms",
9982 #endif
9983 #ifdef WIN16
9984 	"win16",
9985 #endif
9986 #ifdef WIN32
9987 	"win32",
9988 #endif
9989 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
9990 	"win32unix",
9991 #endif
9992 #ifdef WIN64
9993 	"win64",
9994 #endif
9995 #ifdef EBCDIC
9996 	"ebcdic",
9997 #endif
9998 #ifndef CASE_INSENSITIVE_FILENAME
9999 	"fname_case",
10000 #endif
10001 #ifdef FEAT_ARABIC
10002 	"arabic",
10003 #endif
10004 #ifdef FEAT_AUTOCMD
10005 	"autocmd",
10006 #endif
10007 #ifdef FEAT_BEVAL
10008 	"balloon_eval",
10009 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10010 	"balloon_multiline",
10011 # endif
10012 #endif
10013 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10014 	"builtin_terms",
10015 # ifdef ALL_BUILTIN_TCAPS
10016 	"all_builtin_terms",
10017 # endif
10018 #endif
10019 #ifdef FEAT_BYTEOFF
10020 	"byte_offset",
10021 #endif
10022 #ifdef FEAT_CINDENT
10023 	"cindent",
10024 #endif
10025 #ifdef FEAT_CLIENTSERVER
10026 	"clientserver",
10027 #endif
10028 #ifdef FEAT_CLIPBOARD
10029 	"clipboard",
10030 #endif
10031 #ifdef FEAT_CMDL_COMPL
10032 	"cmdline_compl",
10033 #endif
10034 #ifdef FEAT_CMDHIST
10035 	"cmdline_hist",
10036 #endif
10037 #ifdef FEAT_COMMENTS
10038 	"comments",
10039 #endif
10040 #ifdef FEAT_CRYPT
10041 	"cryptv",
10042 #endif
10043 #ifdef FEAT_CSCOPE
10044 	"cscope",
10045 #endif
10046 #ifdef DEBUG
10047 	"debug",
10048 #endif
10049 #ifdef FEAT_CON_DIALOG
10050 	"dialog_con",
10051 #endif
10052 #ifdef FEAT_GUI_DIALOG
10053 	"dialog_gui",
10054 #endif
10055 #ifdef FEAT_DIFF
10056 	"diff",
10057 #endif
10058 #ifdef FEAT_DIGRAPHS
10059 	"digraphs",
10060 #endif
10061 #ifdef FEAT_DND
10062 	"dnd",
10063 #endif
10064 #ifdef FEAT_EMACS_TAGS
10065 	"emacs_tags",
10066 #endif
10067 	"eval",	    /* always present, of course! */
10068 #ifdef FEAT_EX_EXTRA
10069 	"ex_extra",
10070 #endif
10071 #ifdef FEAT_SEARCH_EXTRA
10072 	"extra_search",
10073 #endif
10074 #ifdef FEAT_FKMAP
10075 	"farsi",
10076 #endif
10077 #ifdef FEAT_SEARCHPATH
10078 	"file_in_path",
10079 #endif
10080 #if defined(UNIX) && !defined(USE_SYSTEM)
10081 	"filterpipe",
10082 #endif
10083 #ifdef FEAT_FIND_ID
10084 	"find_in_path",
10085 #endif
10086 #ifdef FEAT_FOLDING
10087 	"folding",
10088 #endif
10089 #ifdef FEAT_FOOTER
10090 	"footer",
10091 #endif
10092 #if !defined(USE_SYSTEM) && defined(UNIX)
10093 	"fork",
10094 #endif
10095 #ifdef FEAT_GETTEXT
10096 	"gettext",
10097 #endif
10098 #ifdef FEAT_GUI
10099 	"gui",
10100 #endif
10101 #ifdef FEAT_GUI_ATHENA
10102 # ifdef FEAT_GUI_NEXTAW
10103 	"gui_neXtaw",
10104 # else
10105 	"gui_athena",
10106 # endif
10107 #endif
10108 #ifdef FEAT_GUI_KDE
10109 	"gui_kde",
10110 #endif
10111 #ifdef FEAT_GUI_GTK
10112 	"gui_gtk",
10113 # ifdef HAVE_GTK2
10114 	"gui_gtk2",
10115 # endif
10116 #endif
10117 #ifdef FEAT_GUI_MAC
10118 	"gui_mac",
10119 #endif
10120 #ifdef FEAT_GUI_MOTIF
10121 	"gui_motif",
10122 #endif
10123 #ifdef FEAT_GUI_PHOTON
10124 	"gui_photon",
10125 #endif
10126 #ifdef FEAT_GUI_W16
10127 	"gui_win16",
10128 #endif
10129 #ifdef FEAT_GUI_W32
10130 	"gui_win32",
10131 #endif
10132 #ifdef FEAT_HANGULIN
10133 	"hangul_input",
10134 #endif
10135 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10136 	"iconv",
10137 #endif
10138 #ifdef FEAT_INS_EXPAND
10139 	"insert_expand",
10140 #endif
10141 #ifdef FEAT_JUMPLIST
10142 	"jumplist",
10143 #endif
10144 #ifdef FEAT_KEYMAP
10145 	"keymap",
10146 #endif
10147 #ifdef FEAT_LANGMAP
10148 	"langmap",
10149 #endif
10150 #ifdef FEAT_LIBCALL
10151 	"libcall",
10152 #endif
10153 #ifdef FEAT_LINEBREAK
10154 	"linebreak",
10155 #endif
10156 #ifdef FEAT_LISP
10157 	"lispindent",
10158 #endif
10159 #ifdef FEAT_LISTCMDS
10160 	"listcmds",
10161 #endif
10162 #ifdef FEAT_LOCALMAP
10163 	"localmap",
10164 #endif
10165 #ifdef FEAT_MENU
10166 	"menu",
10167 #endif
10168 #ifdef FEAT_SESSION
10169 	"mksession",
10170 #endif
10171 #ifdef FEAT_MODIFY_FNAME
10172 	"modify_fname",
10173 #endif
10174 #ifdef FEAT_MOUSE
10175 	"mouse",
10176 #endif
10177 #ifdef FEAT_MOUSESHAPE
10178 	"mouseshape",
10179 #endif
10180 #if defined(UNIX) || defined(VMS)
10181 # ifdef FEAT_MOUSE_DEC
10182 	"mouse_dec",
10183 # endif
10184 # ifdef FEAT_MOUSE_GPM
10185 	"mouse_gpm",
10186 # endif
10187 # ifdef FEAT_MOUSE_JSB
10188 	"mouse_jsbterm",
10189 # endif
10190 # ifdef FEAT_MOUSE_NET
10191 	"mouse_netterm",
10192 # endif
10193 # ifdef FEAT_MOUSE_PTERM
10194 	"mouse_pterm",
10195 # endif
10196 # ifdef FEAT_MOUSE_XTERM
10197 	"mouse_xterm",
10198 # endif
10199 #endif
10200 #ifdef FEAT_MBYTE
10201 	"multi_byte",
10202 #endif
10203 #ifdef FEAT_MBYTE_IME
10204 	"multi_byte_ime",
10205 #endif
10206 #ifdef FEAT_MULTI_LANG
10207 	"multi_lang",
10208 #endif
10209 #ifdef FEAT_MZSCHEME
10210 #ifndef DYNAMIC_MZSCHEME
10211 	"mzscheme",
10212 #endif
10213 #endif
10214 #ifdef FEAT_OLE
10215 	"ole",
10216 #endif
10217 #ifdef FEAT_OSFILETYPE
10218 	"osfiletype",
10219 #endif
10220 #ifdef FEAT_PATH_EXTRA
10221 	"path_extra",
10222 #endif
10223 #ifdef FEAT_PERL
10224 #ifndef DYNAMIC_PERL
10225 	"perl",
10226 #endif
10227 #endif
10228 #ifdef FEAT_PYTHON
10229 #ifndef DYNAMIC_PYTHON
10230 	"python",
10231 #endif
10232 #endif
10233 #ifdef FEAT_POSTSCRIPT
10234 	"postscript",
10235 #endif
10236 #ifdef FEAT_PRINTER
10237 	"printer",
10238 #endif
10239 #ifdef FEAT_PROFILE
10240 	"profile",
10241 #endif
10242 #ifdef FEAT_QUICKFIX
10243 	"quickfix",
10244 #endif
10245 #ifdef FEAT_RIGHTLEFT
10246 	"rightleft",
10247 #endif
10248 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10249 	"ruby",
10250 #endif
10251 #ifdef FEAT_SCROLLBIND
10252 	"scrollbind",
10253 #endif
10254 #ifdef FEAT_CMDL_INFO
10255 	"showcmd",
10256 	"cmdline_info",
10257 #endif
10258 #ifdef FEAT_SIGNS
10259 	"signs",
10260 #endif
10261 #ifdef FEAT_SMARTINDENT
10262 	"smartindent",
10263 #endif
10264 #ifdef FEAT_SNIFF
10265 	"sniff",
10266 #endif
10267 #ifdef FEAT_STL_OPT
10268 	"statusline",
10269 #endif
10270 #ifdef FEAT_SUN_WORKSHOP
10271 	"sun_workshop",
10272 #endif
10273 #ifdef FEAT_NETBEANS_INTG
10274 	"netbeans_intg",
10275 #endif
10276 #ifdef FEAT_SYN_HL
10277 	"spell",
10278 #endif
10279 #ifdef FEAT_SYN_HL
10280 	"syntax",
10281 #endif
10282 #if defined(USE_SYSTEM) || !defined(UNIX)
10283 	"system",
10284 #endif
10285 #ifdef FEAT_TAG_BINS
10286 	"tag_binary",
10287 #endif
10288 #ifdef FEAT_TAG_OLDSTATIC
10289 	"tag_old_static",
10290 #endif
10291 #ifdef FEAT_TAG_ANYWHITE
10292 	"tag_any_white",
10293 #endif
10294 #ifdef FEAT_TCL
10295 # ifndef DYNAMIC_TCL
10296 	"tcl",
10297 # endif
10298 #endif
10299 #ifdef TERMINFO
10300 	"terminfo",
10301 #endif
10302 #ifdef FEAT_TERMRESPONSE
10303 	"termresponse",
10304 #endif
10305 #ifdef FEAT_TEXTOBJ
10306 	"textobjects",
10307 #endif
10308 #ifdef HAVE_TGETENT
10309 	"tgetent",
10310 #endif
10311 #ifdef FEAT_TITLE
10312 	"title",
10313 #endif
10314 #ifdef FEAT_TOOLBAR
10315 	"toolbar",
10316 #endif
10317 #ifdef FEAT_USR_CMDS
10318 	"user-commands",    /* was accidentally included in 5.4 */
10319 	"user_commands",
10320 #endif
10321 #ifdef FEAT_VIMINFO
10322 	"viminfo",
10323 #endif
10324 #ifdef FEAT_VERTSPLIT
10325 	"vertsplit",
10326 #endif
10327 #ifdef FEAT_VIRTUALEDIT
10328 	"virtualedit",
10329 #endif
10330 #ifdef FEAT_VISUAL
10331 	"visual",
10332 #endif
10333 #ifdef FEAT_VISUALEXTRA
10334 	"visualextra",
10335 #endif
10336 #ifdef FEAT_VREPLACE
10337 	"vreplace",
10338 #endif
10339 #ifdef FEAT_WILDIGN
10340 	"wildignore",
10341 #endif
10342 #ifdef FEAT_WILDMENU
10343 	"wildmenu",
10344 #endif
10345 #ifdef FEAT_WINDOWS
10346 	"windows",
10347 #endif
10348 #ifdef FEAT_WAK
10349 	"winaltkeys",
10350 #endif
10351 #ifdef FEAT_WRITEBACKUP
10352 	"writebackup",
10353 #endif
10354 #ifdef FEAT_XIM
10355 	"xim",
10356 #endif
10357 #ifdef FEAT_XFONTSET
10358 	"xfontset",
10359 #endif
10360 #ifdef USE_XSMP
10361 	"xsmp",
10362 #endif
10363 #ifdef USE_XSMP_INTERACT
10364 	"xsmp_interact",
10365 #endif
10366 #ifdef FEAT_XCLIPBOARD
10367 	"xterm_clipboard",
10368 #endif
10369 #ifdef FEAT_XTERM_SAVE
10370 	"xterm_save",
10371 #endif
10372 #if defined(UNIX) && defined(FEAT_X11)
10373 	"X11",
10374 #endif
10375 	NULL
10376     };
10377 
10378     name = get_tv_string(&argvars[0]);
10379     for (i = 0; has_list[i] != NULL; ++i)
10380 	if (STRICMP(name, has_list[i]) == 0)
10381 	{
10382 	    n = TRUE;
10383 	    break;
10384 	}
10385 
10386     if (n == FALSE)
10387     {
10388 	if (STRNICMP(name, "patch", 5) == 0)
10389 	    n = has_patch(atoi((char *)name + 5));
10390 	else if (STRICMP(name, "vim_starting") == 0)
10391 	    n = (starting != 0);
10392 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10393 	else if (STRICMP(name, "balloon_multiline") == 0)
10394 	    n = multiline_balloon_available();
10395 #endif
10396 #ifdef DYNAMIC_TCL
10397 	else if (STRICMP(name, "tcl") == 0)
10398 	    n = tcl_enabled(FALSE);
10399 #endif
10400 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10401 	else if (STRICMP(name, "iconv") == 0)
10402 	    n = iconv_enabled(FALSE);
10403 #endif
10404 #ifdef DYNAMIC_MZSCHEME
10405 	else if (STRICMP(name, "mzscheme") == 0)
10406 	    n = mzscheme_enabled(FALSE);
10407 #endif
10408 #ifdef DYNAMIC_RUBY
10409 	else if (STRICMP(name, "ruby") == 0)
10410 	    n = ruby_enabled(FALSE);
10411 #endif
10412 #ifdef DYNAMIC_PYTHON
10413 	else if (STRICMP(name, "python") == 0)
10414 	    n = python_enabled(FALSE);
10415 #endif
10416 #ifdef DYNAMIC_PERL
10417 	else if (STRICMP(name, "perl") == 0)
10418 	    n = perl_enabled(FALSE);
10419 #endif
10420 #ifdef FEAT_GUI
10421 	else if (STRICMP(name, "gui_running") == 0)
10422 	    n = (gui.in_use || gui.starting);
10423 # ifdef FEAT_GUI_W32
10424 	else if (STRICMP(name, "gui_win32s") == 0)
10425 	    n = gui_is_win32s();
10426 # endif
10427 # ifdef FEAT_BROWSE
10428 	else if (STRICMP(name, "browse") == 0)
10429 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10430 # endif
10431 #endif
10432 #ifdef FEAT_SYN_HL
10433 	else if (STRICMP(name, "syntax_items") == 0)
10434 	    n = syntax_present(curbuf);
10435 #endif
10436 #if defined(WIN3264)
10437 	else if (STRICMP(name, "win95") == 0)
10438 	    n = mch_windows95();
10439 #endif
10440 #ifdef FEAT_NETBEANS_INTG
10441 	else if (STRICMP(name, "netbeans_enabled") == 0)
10442 	    n = usingNetbeans;
10443 #endif
10444     }
10445 
10446     rettv->vval.v_number = n;
10447 }
10448 
10449 /*
10450  * "has_key()" function
10451  */
10452     static void
10453 f_has_key(argvars, rettv)
10454     typval_T	*argvars;
10455     typval_T	*rettv;
10456 {
10457     rettv->vval.v_number = 0;
10458     if (argvars[0].v_type != VAR_DICT)
10459     {
10460 	EMSG(_(e_dictreq));
10461 	return;
10462     }
10463     if (argvars[0].vval.v_dict == NULL)
10464 	return;
10465 
10466     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10467 				      get_tv_string(&argvars[1]), -1) != NULL;
10468 }
10469 
10470 /*
10471  * "hasmapto()" function
10472  */
10473     static void
10474 f_hasmapto(argvars, rettv)
10475     typval_T	*argvars;
10476     typval_T	*rettv;
10477 {
10478     char_u	*name;
10479     char_u	*mode;
10480     char_u	buf[NUMBUFLEN];
10481 
10482     name = get_tv_string(&argvars[0]);
10483     if (argvars[1].v_type == VAR_UNKNOWN)
10484 	mode = (char_u *)"nvo";
10485     else
10486 	mode = get_tv_string_buf(&argvars[1], buf);
10487 
10488     if (map_to_exists(name, mode))
10489 	rettv->vval.v_number = TRUE;
10490     else
10491 	rettv->vval.v_number = FALSE;
10492 }
10493 
10494 /*
10495  * "histadd()" function
10496  */
10497 /*ARGSUSED*/
10498     static void
10499 f_histadd(argvars, rettv)
10500     typval_T	*argvars;
10501     typval_T	*rettv;
10502 {
10503 #ifdef FEAT_CMDHIST
10504     int		histype;
10505     char_u	*str;
10506     char_u	buf[NUMBUFLEN];
10507 #endif
10508 
10509     rettv->vval.v_number = FALSE;
10510     if (check_restricted() || check_secure())
10511 	return;
10512 #ifdef FEAT_CMDHIST
10513     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10514     histype = str != NULL ? get_histtype(str) : -1;
10515     if (histype >= 0)
10516     {
10517 	str = get_tv_string_buf(&argvars[1], buf);
10518 	if (*str != NUL)
10519 	{
10520 	    add_to_history(histype, str, FALSE, NUL);
10521 	    rettv->vval.v_number = TRUE;
10522 	    return;
10523 	}
10524     }
10525 #endif
10526 }
10527 
10528 /*
10529  * "histdel()" function
10530  */
10531 /*ARGSUSED*/
10532     static void
10533 f_histdel(argvars, rettv)
10534     typval_T	*argvars;
10535     typval_T	*rettv;
10536 {
10537 #ifdef FEAT_CMDHIST
10538     int		n;
10539     char_u	buf[NUMBUFLEN];
10540     char_u	*str;
10541 
10542     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10543     if (str == NULL)
10544 	n = 0;
10545     else if (argvars[1].v_type == VAR_UNKNOWN)
10546 	/* only one argument: clear entire history */
10547 	n = clr_history(get_histtype(str));
10548     else if (argvars[1].v_type == VAR_NUMBER)
10549 	/* index given: remove that entry */
10550 	n = del_history_idx(get_histtype(str),
10551 					  (int)get_tv_number(&argvars[1]));
10552     else
10553 	/* string given: remove all matching entries */
10554 	n = del_history_entry(get_histtype(str),
10555 				      get_tv_string_buf(&argvars[1], buf));
10556     rettv->vval.v_number = n;
10557 #else
10558     rettv->vval.v_number = 0;
10559 #endif
10560 }
10561 
10562 /*
10563  * "histget()" function
10564  */
10565 /*ARGSUSED*/
10566     static void
10567 f_histget(argvars, rettv)
10568     typval_T	*argvars;
10569     typval_T	*rettv;
10570 {
10571 #ifdef FEAT_CMDHIST
10572     int		type;
10573     int		idx;
10574     char_u	*str;
10575 
10576     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10577     if (str == NULL)
10578 	rettv->vval.v_string = NULL;
10579     else
10580     {
10581 	type = get_histtype(str);
10582 	if (argvars[1].v_type == VAR_UNKNOWN)
10583 	    idx = get_history_idx(type);
10584 	else
10585 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10586 						    /* -1 on type error */
10587 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10588     }
10589 #else
10590     rettv->vval.v_string = NULL;
10591 #endif
10592     rettv->v_type = VAR_STRING;
10593 }
10594 
10595 /*
10596  * "histnr()" function
10597  */
10598 /*ARGSUSED*/
10599     static void
10600 f_histnr(argvars, rettv)
10601     typval_T	*argvars;
10602     typval_T	*rettv;
10603 {
10604     int		i;
10605 
10606 #ifdef FEAT_CMDHIST
10607     char_u	*history = get_tv_string_chk(&argvars[0]);
10608 
10609     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10610     if (i >= HIST_CMD && i < HIST_COUNT)
10611 	i = get_history_idx(i);
10612     else
10613 #endif
10614 	i = -1;
10615     rettv->vval.v_number = i;
10616 }
10617 
10618 /*
10619  * "highlightID(name)" function
10620  */
10621     static void
10622 f_hlID(argvars, rettv)
10623     typval_T	*argvars;
10624     typval_T	*rettv;
10625 {
10626     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10627 }
10628 
10629 /*
10630  * "highlight_exists()" function
10631  */
10632     static void
10633 f_hlexists(argvars, rettv)
10634     typval_T	*argvars;
10635     typval_T	*rettv;
10636 {
10637     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10638 }
10639 
10640 /*
10641  * "hostname()" function
10642  */
10643 /*ARGSUSED*/
10644     static void
10645 f_hostname(argvars, rettv)
10646     typval_T	*argvars;
10647     typval_T	*rettv;
10648 {
10649     char_u hostname[256];
10650 
10651     mch_get_host_name(hostname, 256);
10652     rettv->v_type = VAR_STRING;
10653     rettv->vval.v_string = vim_strsave(hostname);
10654 }
10655 
10656 /*
10657  * iconv() function
10658  */
10659 /*ARGSUSED*/
10660     static void
10661 f_iconv(argvars, rettv)
10662     typval_T	*argvars;
10663     typval_T	*rettv;
10664 {
10665 #ifdef FEAT_MBYTE
10666     char_u	buf1[NUMBUFLEN];
10667     char_u	buf2[NUMBUFLEN];
10668     char_u	*from, *to, *str;
10669     vimconv_T	vimconv;
10670 #endif
10671 
10672     rettv->v_type = VAR_STRING;
10673     rettv->vval.v_string = NULL;
10674 
10675 #ifdef FEAT_MBYTE
10676     str = get_tv_string(&argvars[0]);
10677     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10678     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10679     vimconv.vc_type = CONV_NONE;
10680     convert_setup(&vimconv, from, to);
10681 
10682     /* If the encodings are equal, no conversion needed. */
10683     if (vimconv.vc_type == CONV_NONE)
10684 	rettv->vval.v_string = vim_strsave(str);
10685     else
10686 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10687 
10688     convert_setup(&vimconv, NULL, NULL);
10689     vim_free(from);
10690     vim_free(to);
10691 #endif
10692 }
10693 
10694 /*
10695  * "indent()" function
10696  */
10697     static void
10698 f_indent(argvars, rettv)
10699     typval_T	*argvars;
10700     typval_T	*rettv;
10701 {
10702     linenr_T	lnum;
10703 
10704     lnum = get_tv_lnum(argvars);
10705     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10706 	rettv->vval.v_number = get_indent_lnum(lnum);
10707     else
10708 	rettv->vval.v_number = -1;
10709 }
10710 
10711 /*
10712  * "index()" function
10713  */
10714     static void
10715 f_index(argvars, rettv)
10716     typval_T	*argvars;
10717     typval_T	*rettv;
10718 {
10719     list_T	*l;
10720     listitem_T	*item;
10721     long	idx = 0;
10722     int		ic = FALSE;
10723 
10724     rettv->vval.v_number = -1;
10725     if (argvars[0].v_type != VAR_LIST)
10726     {
10727 	EMSG(_(e_listreq));
10728 	return;
10729     }
10730     l = argvars[0].vval.v_list;
10731     if (l != NULL)
10732     {
10733 	item = l->lv_first;
10734 	if (argvars[2].v_type != VAR_UNKNOWN)
10735 	{
10736 	    int		error = FALSE;
10737 
10738 	    /* Start at specified item.  Use the cached index that list_find()
10739 	     * sets, so that a negative number also works. */
10740 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10741 	    idx = l->lv_idx;
10742 	    if (argvars[3].v_type != VAR_UNKNOWN)
10743 		ic = get_tv_number_chk(&argvars[3], &error);
10744 	    if (error)
10745 		item = NULL;
10746 	}
10747 
10748 	for ( ; item != NULL; item = item->li_next, ++idx)
10749 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10750 	    {
10751 		rettv->vval.v_number = idx;
10752 		break;
10753 	    }
10754     }
10755 }
10756 
10757 static int inputsecret_flag = 0;
10758 
10759 /*
10760  * "input()" function
10761  *     Also handles inputsecret() when inputsecret is set.
10762  */
10763     static void
10764 f_input(argvars, rettv)
10765     typval_T	*argvars;
10766     typval_T	*rettv;
10767 {
10768     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10769     char_u	*p = NULL;
10770     int		c;
10771     char_u	buf[NUMBUFLEN];
10772     int		cmd_silent_save = cmd_silent;
10773     char_u	*defstr = (char_u *)"";
10774 
10775     rettv->v_type = VAR_STRING;
10776 
10777 #ifdef NO_CONSOLE_INPUT
10778     /* While starting up, there is no place to enter text. */
10779     if (no_console_input())
10780     {
10781 	rettv->vval.v_string = NULL;
10782 	return;
10783     }
10784 #endif
10785 
10786     cmd_silent = FALSE;		/* Want to see the prompt. */
10787     if (prompt != NULL)
10788     {
10789 	/* Only the part of the message after the last NL is considered as
10790 	 * prompt for the command line */
10791 	p = vim_strrchr(prompt, '\n');
10792 	if (p == NULL)
10793 	    p = prompt;
10794 	else
10795 	{
10796 	    ++p;
10797 	    c = *p;
10798 	    *p = NUL;
10799 	    msg_start();
10800 	    msg_clr_eos();
10801 	    msg_puts_attr(prompt, echo_attr);
10802 	    msg_didout = FALSE;
10803 	    msg_starthere();
10804 	    *p = c;
10805 	}
10806 	cmdline_row = msg_row;
10807 
10808 	if (argvars[1].v_type != VAR_UNKNOWN)
10809 	{
10810 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10811 	    if (defstr != NULL)
10812 		stuffReadbuffSpec(defstr);
10813 	}
10814 
10815 	if (defstr != NULL)
10816 	    rettv->vval.v_string =
10817 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr);
10818 
10819 	/* since the user typed this, no need to wait for return */
10820 	need_wait_return = FALSE;
10821 	msg_didout = FALSE;
10822     }
10823     cmd_silent = cmd_silent_save;
10824 }
10825 
10826 /*
10827  * "inputdialog()" function
10828  */
10829     static void
10830 f_inputdialog(argvars, rettv)
10831     typval_T	*argvars;
10832     typval_T	*rettv;
10833 {
10834 #if defined(FEAT_GUI_TEXTDIALOG)
10835     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10836     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10837     {
10838 	char_u	*message;
10839 	char_u	buf[NUMBUFLEN];
10840 	char_u	*defstr = (char_u *)"";
10841 
10842 	message = get_tv_string_chk(&argvars[0]);
10843 	if (argvars[1].v_type != VAR_UNKNOWN
10844 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10845 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10846 	else
10847 	    IObuff[0] = NUL;
10848 	if (message != NULL && defstr != NULL
10849 		&& do_dialog(VIM_QUESTION, NULL, message,
10850 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10851 	    rettv->vval.v_string = vim_strsave(IObuff);
10852 	else
10853 	{
10854 	    if (message != NULL && defstr != NULL
10855 					&& argvars[1].v_type != VAR_UNKNOWN
10856 					&& argvars[2].v_type != VAR_UNKNOWN)
10857 		rettv->vval.v_string = vim_strsave(
10858 				      get_tv_string_buf(&argvars[2], buf));
10859 	    else
10860 		rettv->vval.v_string = NULL;
10861 	}
10862 	rettv->v_type = VAR_STRING;
10863     }
10864     else
10865 #endif
10866 	f_input(argvars, rettv);
10867 }
10868 
10869 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10870 
10871 /*
10872  * "inputrestore()" function
10873  */
10874 /*ARGSUSED*/
10875     static void
10876 f_inputrestore(argvars, rettv)
10877     typval_T	*argvars;
10878     typval_T	*rettv;
10879 {
10880     if (ga_userinput.ga_len > 0)
10881     {
10882 	--ga_userinput.ga_len;
10883 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10884 						       + ga_userinput.ga_len);
10885 	rettv->vval.v_number = 0; /* OK */
10886     }
10887     else if (p_verbose > 1)
10888     {
10889 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
10890 	rettv->vval.v_number = 1; /* Failed */
10891     }
10892 }
10893 
10894 /*
10895  * "inputsave()" function
10896  */
10897 /*ARGSUSED*/
10898     static void
10899 f_inputsave(argvars, rettv)
10900     typval_T	*argvars;
10901     typval_T	*rettv;
10902 {
10903     /* Add an entry to the stack of typehead storage. */
10904     if (ga_grow(&ga_userinput, 1) == OK)
10905     {
10906 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
10907 						       + ga_userinput.ga_len);
10908 	++ga_userinput.ga_len;
10909 	rettv->vval.v_number = 0; /* OK */
10910     }
10911     else
10912 	rettv->vval.v_number = 1; /* Failed */
10913 }
10914 
10915 /*
10916  * "inputsecret()" function
10917  */
10918     static void
10919 f_inputsecret(argvars, rettv)
10920     typval_T	*argvars;
10921     typval_T	*rettv;
10922 {
10923     ++cmdline_star;
10924     ++inputsecret_flag;
10925     f_input(argvars, rettv);
10926     --cmdline_star;
10927     --inputsecret_flag;
10928 }
10929 
10930 /*
10931  * "insert()" function
10932  */
10933     static void
10934 f_insert(argvars, rettv)
10935     typval_T	*argvars;
10936     typval_T	*rettv;
10937 {
10938     long	before = 0;
10939     listitem_T	*item;
10940     list_T	*l;
10941     int		error = FALSE;
10942 
10943     rettv->vval.v_number = 0;
10944     if (argvars[0].v_type != VAR_LIST)
10945 	EMSG2(_(e_listarg), "insert()");
10946     else if ((l = argvars[0].vval.v_list) != NULL
10947 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
10948     {
10949 	if (argvars[2].v_type != VAR_UNKNOWN)
10950 	    before = get_tv_number_chk(&argvars[2], &error);
10951 	if (error)
10952 	    return;		/* type error; errmsg already given */
10953 
10954 	if (before == l->lv_len)
10955 	    item = NULL;
10956 	else
10957 	{
10958 	    item = list_find(l, before);
10959 	    if (item == NULL)
10960 	    {
10961 		EMSGN(_(e_listidx), before);
10962 		l = NULL;
10963 	    }
10964 	}
10965 	if (l != NULL)
10966 	{
10967 	    list_insert_tv(l, &argvars[1], item);
10968 	    copy_tv(&argvars[0], rettv);
10969 	}
10970     }
10971 }
10972 
10973 /*
10974  * "isdirectory()" function
10975  */
10976     static void
10977 f_isdirectory(argvars, rettv)
10978     typval_T	*argvars;
10979     typval_T	*rettv;
10980 {
10981     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
10982 }
10983 
10984 /*
10985  * "islocked()" function
10986  */
10987     static void
10988 f_islocked(argvars, rettv)
10989     typval_T	*argvars;
10990     typval_T	*rettv;
10991 {
10992     lval_T	lv;
10993     char_u	*end;
10994     dictitem_T	*di;
10995 
10996     rettv->vval.v_number = -1;
10997     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
10998 							     FNE_CHECK_START);
10999     if (end != NULL && lv.ll_name != NULL)
11000     {
11001 	if (*end != NUL)
11002 	    EMSG(_(e_trailing));
11003 	else
11004 	{
11005 	    if (lv.ll_tv == NULL)
11006 	    {
11007 		if (check_changedtick(lv.ll_name))
11008 		    rettv->vval.v_number = 1;	    /* always locked */
11009 		else
11010 		{
11011 		    di = find_var(lv.ll_name, NULL);
11012 		    if (di != NULL)
11013 		    {
11014 			/* Consider a variable locked when:
11015 			 * 1. the variable itself is locked
11016 			 * 2. the value of the variable is locked.
11017 			 * 3. the List or Dict value is locked.
11018 			 */
11019 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11020 						  || tv_islocked(&di->di_tv));
11021 		    }
11022 		}
11023 	    }
11024 	    else if (lv.ll_range)
11025 		EMSG(_("E745: Range not allowed"));
11026 	    else if (lv.ll_newkey != NULL)
11027 		EMSG2(_(e_dictkey), lv.ll_newkey);
11028 	    else if (lv.ll_list != NULL)
11029 		/* List item. */
11030 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11031 	    else
11032 		/* Dictionary item. */
11033 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11034 	}
11035     }
11036 
11037     clear_lval(&lv);
11038 }
11039 
11040 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11041 
11042 /*
11043  * Turn a dict into a list:
11044  * "what" == 0: list of keys
11045  * "what" == 1: list of values
11046  * "what" == 2: list of items
11047  */
11048     static void
11049 dict_list(argvars, rettv, what)
11050     typval_T	*argvars;
11051     typval_T	*rettv;
11052     int		what;
11053 {
11054     list_T	*l;
11055     list_T	*l2;
11056     dictitem_T	*di;
11057     hashitem_T	*hi;
11058     listitem_T	*li;
11059     listitem_T	*li2;
11060     dict_T	*d;
11061     int		todo;
11062 
11063     rettv->vval.v_number = 0;
11064     if (argvars[0].v_type != VAR_DICT)
11065     {
11066 	EMSG(_(e_dictreq));
11067 	return;
11068     }
11069     if ((d = argvars[0].vval.v_dict) == NULL)
11070 	return;
11071 
11072     l = list_alloc();
11073     if (l == NULL)
11074 	return;
11075     rettv->v_type = VAR_LIST;
11076     rettv->vval.v_list = l;
11077     ++l->lv_refcount;
11078 
11079     todo = d->dv_hashtab.ht_used;
11080     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11081     {
11082 	if (!HASHITEM_EMPTY(hi))
11083 	{
11084 	    --todo;
11085 	    di = HI2DI(hi);
11086 
11087 	    li = listitem_alloc();
11088 	    if (li == NULL)
11089 		break;
11090 	    list_append(l, li);
11091 
11092 	    if (what == 0)
11093 	    {
11094 		/* keys() */
11095 		li->li_tv.v_type = VAR_STRING;
11096 		li->li_tv.v_lock = 0;
11097 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11098 	    }
11099 	    else if (what == 1)
11100 	    {
11101 		/* values() */
11102 		copy_tv(&di->di_tv, &li->li_tv);
11103 	    }
11104 	    else
11105 	    {
11106 		/* items() */
11107 		l2 = list_alloc();
11108 		li->li_tv.v_type = VAR_LIST;
11109 		li->li_tv.v_lock = 0;
11110 		li->li_tv.vval.v_list = l2;
11111 		if (l2 == NULL)
11112 		    break;
11113 		++l2->lv_refcount;
11114 
11115 		li2 = listitem_alloc();
11116 		if (li2 == NULL)
11117 		    break;
11118 		list_append(l2, li2);
11119 		li2->li_tv.v_type = VAR_STRING;
11120 		li2->li_tv.v_lock = 0;
11121 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11122 
11123 		li2 = listitem_alloc();
11124 		if (li2 == NULL)
11125 		    break;
11126 		list_append(l2, li2);
11127 		copy_tv(&di->di_tv, &li2->li_tv);
11128 	    }
11129 	}
11130     }
11131 }
11132 
11133 /*
11134  * "items(dict)" function
11135  */
11136     static void
11137 f_items(argvars, rettv)
11138     typval_T	*argvars;
11139     typval_T	*rettv;
11140 {
11141     dict_list(argvars, rettv, 2);
11142 }
11143 
11144 /*
11145  * "join()" function
11146  */
11147     static void
11148 f_join(argvars, rettv)
11149     typval_T	*argvars;
11150     typval_T	*rettv;
11151 {
11152     garray_T	ga;
11153     char_u	*sep;
11154 
11155     rettv->vval.v_number = 0;
11156     if (argvars[0].v_type != VAR_LIST)
11157     {
11158 	EMSG(_(e_listreq));
11159 	return;
11160     }
11161     if (argvars[0].vval.v_list == NULL)
11162 	return;
11163     if (argvars[1].v_type == VAR_UNKNOWN)
11164 	sep = (char_u *)" ";
11165     else
11166 	sep = get_tv_string_chk(&argvars[1]);
11167 
11168     rettv->v_type = VAR_STRING;
11169 
11170     if (sep != NULL)
11171     {
11172 	ga_init2(&ga, (int)sizeof(char), 80);
11173 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11174 	ga_append(&ga, NUL);
11175 	rettv->vval.v_string = (char_u *)ga.ga_data;
11176     }
11177     else
11178 	rettv->vval.v_string = NULL;
11179 }
11180 
11181 /*
11182  * "keys()" function
11183  */
11184     static void
11185 f_keys(argvars, rettv)
11186     typval_T	*argvars;
11187     typval_T	*rettv;
11188 {
11189     dict_list(argvars, rettv, 0);
11190 }
11191 
11192 /*
11193  * "last_buffer_nr()" function.
11194  */
11195 /*ARGSUSED*/
11196     static void
11197 f_last_buffer_nr(argvars, rettv)
11198     typval_T	*argvars;
11199     typval_T	*rettv;
11200 {
11201     int		n = 0;
11202     buf_T	*buf;
11203 
11204     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11205 	if (n < buf->b_fnum)
11206 	    n = buf->b_fnum;
11207 
11208     rettv->vval.v_number = n;
11209 }
11210 
11211 /*
11212  * "len()" function
11213  */
11214     static void
11215 f_len(argvars, rettv)
11216     typval_T	*argvars;
11217     typval_T	*rettv;
11218 {
11219     switch (argvars[0].v_type)
11220     {
11221 	case VAR_STRING:
11222 	case VAR_NUMBER:
11223 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11224 					       get_tv_string(&argvars[0]));
11225 	    break;
11226 	case VAR_LIST:
11227 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11228 	    break;
11229 	case VAR_DICT:
11230 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11231 	    break;
11232 	default:
11233 	    EMSG(_("E701: Invalid type for len()"));
11234 	    break;
11235     }
11236 }
11237 
11238 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11239 
11240     static void
11241 libcall_common(argvars, rettv, type)
11242     typval_T	*argvars;
11243     typval_T	*rettv;
11244     int		type;
11245 {
11246 #ifdef FEAT_LIBCALL
11247     char_u		*string_in;
11248     char_u		**string_result;
11249     int			nr_result;
11250 #endif
11251 
11252     rettv->v_type = type;
11253     if (type == VAR_NUMBER)
11254 	rettv->vval.v_number = 0;
11255     else
11256 	rettv->vval.v_string = NULL;
11257 
11258     if (check_restricted() || check_secure())
11259 	return;
11260 
11261 #ifdef FEAT_LIBCALL
11262     /* The first two args must be strings, otherwise its meaningless */
11263     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11264     {
11265 	string_in = NULL;
11266 	if (argvars[2].v_type == VAR_STRING)
11267 	    string_in = argvars[2].vval.v_string;
11268 	if (type == VAR_NUMBER)
11269 	    string_result = NULL;
11270 	else
11271 	    string_result = &rettv->vval.v_string;
11272 	if (mch_libcall(argvars[0].vval.v_string,
11273 			     argvars[1].vval.v_string,
11274 			     string_in,
11275 			     argvars[2].vval.v_number,
11276 			     string_result,
11277 			     &nr_result) == OK
11278 		&& type == VAR_NUMBER)
11279 	    rettv->vval.v_number = nr_result;
11280     }
11281 #endif
11282 }
11283 
11284 /*
11285  * "libcall()" function
11286  */
11287     static void
11288 f_libcall(argvars, rettv)
11289     typval_T	*argvars;
11290     typval_T	*rettv;
11291 {
11292     libcall_common(argvars, rettv, VAR_STRING);
11293 }
11294 
11295 /*
11296  * "libcallnr()" function
11297  */
11298     static void
11299 f_libcallnr(argvars, rettv)
11300     typval_T	*argvars;
11301     typval_T	*rettv;
11302 {
11303     libcall_common(argvars, rettv, VAR_NUMBER);
11304 }
11305 
11306 /*
11307  * "line(string)" function
11308  */
11309     static void
11310 f_line(argvars, rettv)
11311     typval_T	*argvars;
11312     typval_T	*rettv;
11313 {
11314     linenr_T	lnum = 0;
11315     pos_T	*fp;
11316 
11317     fp = var2fpos(&argvars[0], TRUE);
11318     if (fp != NULL)
11319 	lnum = fp->lnum;
11320     rettv->vval.v_number = lnum;
11321 }
11322 
11323 /*
11324  * "line2byte(lnum)" function
11325  */
11326 /*ARGSUSED*/
11327     static void
11328 f_line2byte(argvars, rettv)
11329     typval_T	*argvars;
11330     typval_T	*rettv;
11331 {
11332 #ifndef FEAT_BYTEOFF
11333     rettv->vval.v_number = -1;
11334 #else
11335     linenr_T	lnum;
11336 
11337     lnum = get_tv_lnum(argvars);
11338     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11339 	rettv->vval.v_number = -1;
11340     else
11341 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11342     if (rettv->vval.v_number >= 0)
11343 	++rettv->vval.v_number;
11344 #endif
11345 }
11346 
11347 /*
11348  * "lispindent(lnum)" function
11349  */
11350     static void
11351 f_lispindent(argvars, rettv)
11352     typval_T	*argvars;
11353     typval_T	*rettv;
11354 {
11355 #ifdef FEAT_LISP
11356     pos_T	pos;
11357     linenr_T	lnum;
11358 
11359     pos = curwin->w_cursor;
11360     lnum = get_tv_lnum(argvars);
11361     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11362     {
11363 	curwin->w_cursor.lnum = lnum;
11364 	rettv->vval.v_number = get_lisp_indent();
11365 	curwin->w_cursor = pos;
11366     }
11367     else
11368 #endif
11369 	rettv->vval.v_number = -1;
11370 }
11371 
11372 /*
11373  * "localtime()" function
11374  */
11375 /*ARGSUSED*/
11376     static void
11377 f_localtime(argvars, rettv)
11378     typval_T	*argvars;
11379     typval_T	*rettv;
11380 {
11381     rettv->vval.v_number = (varnumber_T)time(NULL);
11382 }
11383 
11384 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11385 
11386     static void
11387 get_maparg(argvars, rettv, exact)
11388     typval_T	*argvars;
11389     typval_T	*rettv;
11390     int		exact;
11391 {
11392     char_u	*keys;
11393     char_u	*which;
11394     char_u	buf[NUMBUFLEN];
11395     char_u	*keys_buf = NULL;
11396     char_u	*rhs;
11397     int		mode;
11398     garray_T	ga;
11399 
11400     /* return empty string for failure */
11401     rettv->v_type = VAR_STRING;
11402     rettv->vval.v_string = NULL;
11403 
11404     keys = get_tv_string(&argvars[0]);
11405     if (*keys == NUL)
11406 	return;
11407 
11408     if (argvars[1].v_type != VAR_UNKNOWN)
11409 	which = get_tv_string_buf_chk(&argvars[1], buf);
11410     else
11411 	which = (char_u *)"";
11412     if (which == NULL)
11413 	return;
11414 
11415     mode = get_map_mode(&which, 0);
11416 
11417     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11418     rhs = check_map(keys, mode, exact, FALSE);
11419     vim_free(keys_buf);
11420     if (rhs != NULL)
11421     {
11422 	ga_init(&ga);
11423 	ga.ga_itemsize = 1;
11424 	ga.ga_growsize = 40;
11425 
11426 	while (*rhs != NUL)
11427 	    ga_concat(&ga, str2special(&rhs, FALSE));
11428 
11429 	ga_append(&ga, NUL);
11430 	rettv->vval.v_string = (char_u *)ga.ga_data;
11431     }
11432 }
11433 
11434 /*
11435  * "map()" function
11436  */
11437     static void
11438 f_map(argvars, rettv)
11439     typval_T	*argvars;
11440     typval_T	*rettv;
11441 {
11442     filter_map(argvars, rettv, TRUE);
11443 }
11444 
11445 /*
11446  * "maparg()" function
11447  */
11448     static void
11449 f_maparg(argvars, rettv)
11450     typval_T	*argvars;
11451     typval_T	*rettv;
11452 {
11453     get_maparg(argvars, rettv, TRUE);
11454 }
11455 
11456 /*
11457  * "mapcheck()" function
11458  */
11459     static void
11460 f_mapcheck(argvars, rettv)
11461     typval_T	*argvars;
11462     typval_T	*rettv;
11463 {
11464     get_maparg(argvars, rettv, FALSE);
11465 }
11466 
11467 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11468 
11469     static void
11470 find_some_match(argvars, rettv, type)
11471     typval_T	*argvars;
11472     typval_T	*rettv;
11473     int		type;
11474 {
11475     char_u	*str = NULL;
11476     char_u	*expr = NULL;
11477     char_u	*pat;
11478     regmatch_T	regmatch;
11479     char_u	patbuf[NUMBUFLEN];
11480     char_u	strbuf[NUMBUFLEN];
11481     char_u	*save_cpo;
11482     long	start = 0;
11483     long	nth = 1;
11484     int		match = 0;
11485     list_T	*l = NULL;
11486     listitem_T	*li = NULL;
11487     long	idx = 0;
11488     char_u	*tofree = NULL;
11489 
11490     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11491     save_cpo = p_cpo;
11492     p_cpo = (char_u *)"";
11493 
11494     rettv->vval.v_number = -1;
11495     if (type == 3)
11496     {
11497 	/* return empty list when there are no matches */
11498 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11499 	    goto theend;
11500 	rettv->v_type = VAR_LIST;
11501 	++rettv->vval.v_list->lv_refcount;
11502     }
11503     else if (type == 2)
11504     {
11505 	rettv->v_type = VAR_STRING;
11506 	rettv->vval.v_string = NULL;
11507     }
11508 
11509     if (argvars[0].v_type == VAR_LIST)
11510     {
11511 	if ((l = argvars[0].vval.v_list) == NULL)
11512 	    goto theend;
11513 	li = l->lv_first;
11514     }
11515     else
11516 	expr = str = get_tv_string(&argvars[0]);
11517 
11518     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11519     if (pat == NULL)
11520 	goto theend;
11521 
11522     if (argvars[2].v_type != VAR_UNKNOWN)
11523     {
11524 	int	    error = FALSE;
11525 
11526 	start = get_tv_number_chk(&argvars[2], &error);
11527 	if (error)
11528 	    goto theend;
11529 	if (l != NULL)
11530 	{
11531 	    li = list_find(l, start);
11532 	    if (li == NULL)
11533 		goto theend;
11534 	    idx = l->lv_idx;	/* use the cached index */
11535 	}
11536 	else
11537 	{
11538 	    if (start < 0)
11539 		start = 0;
11540 	    if (start > (long)STRLEN(str))
11541 		goto theend;
11542 	    str += start;
11543 	}
11544 
11545 	if (argvars[3].v_type != VAR_UNKNOWN)
11546 	    nth = get_tv_number_chk(&argvars[3], &error);
11547 	if (error)
11548 	    goto theend;
11549     }
11550 
11551     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11552     if (regmatch.regprog != NULL)
11553     {
11554 	regmatch.rm_ic = p_ic;
11555 
11556 	for (;;)
11557 	{
11558 	    if (l != NULL)
11559 	    {
11560 		if (li == NULL)
11561 		{
11562 		    match = FALSE;
11563 		    break;
11564 		}
11565 		vim_free(tofree);
11566 		str = echo_string(&li->li_tv, &tofree, strbuf);
11567 		if (str == NULL)
11568 		    break;
11569 	    }
11570 
11571 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11572 
11573 	    if (match && --nth <= 0)
11574 		break;
11575 	    if (l == NULL && !match)
11576 		break;
11577 
11578 	    /* Advance to just after the match. */
11579 	    if (l != NULL)
11580 	    {
11581 		li = li->li_next;
11582 		++idx;
11583 	    }
11584 	    else
11585 	    {
11586 #ifdef FEAT_MBYTE
11587 		str = regmatch.startp[0] + (*mb_ptr2len)(regmatch.startp[0]);
11588 #else
11589 		str = regmatch.startp[0] + 1;
11590 #endif
11591 	    }
11592 	}
11593 
11594 	if (match)
11595 	{
11596 	    if (type == 3)
11597 	    {
11598 		int i;
11599 
11600 		/* return list with matched string and submatches */
11601 		for (i = 0; i < NSUBEXP; ++i)
11602 		{
11603 		    if (regmatch.endp[i] == NULL)
11604 			break;
11605 		    li = listitem_alloc();
11606 		    if (li == NULL)
11607 			break;
11608 		    li->li_tv.v_type = VAR_STRING;
11609 		    li->li_tv.v_lock = 0;
11610 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11611 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11612 		    list_append(rettv->vval.v_list, li);
11613 		}
11614 	    }
11615 	    else if (type == 2)
11616 	    {
11617 		/* return matched string */
11618 		if (l != NULL)
11619 		    copy_tv(&li->li_tv, rettv);
11620 		else
11621 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11622 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11623 	    }
11624 	    else if (l != NULL)
11625 		rettv->vval.v_number = idx;
11626 	    else
11627 	    {
11628 		if (type != 0)
11629 		    rettv->vval.v_number =
11630 				      (varnumber_T)(regmatch.startp[0] - str);
11631 		else
11632 		    rettv->vval.v_number =
11633 					(varnumber_T)(regmatch.endp[0] - str);
11634 		rettv->vval.v_number += str - expr;
11635 	    }
11636 	}
11637 	vim_free(regmatch.regprog);
11638     }
11639 
11640 theend:
11641     vim_free(tofree);
11642     p_cpo = save_cpo;
11643 }
11644 
11645 /*
11646  * "match()" function
11647  */
11648     static void
11649 f_match(argvars, rettv)
11650     typval_T	*argvars;
11651     typval_T	*rettv;
11652 {
11653     find_some_match(argvars, rettv, 1);
11654 }
11655 
11656 /*
11657  * "matchend()" function
11658  */
11659     static void
11660 f_matchend(argvars, rettv)
11661     typval_T	*argvars;
11662     typval_T	*rettv;
11663 {
11664     find_some_match(argvars, rettv, 0);
11665 }
11666 
11667 /*
11668  * "matchlist()" function
11669  */
11670     static void
11671 f_matchlist(argvars, rettv)
11672     typval_T	*argvars;
11673     typval_T	*rettv;
11674 {
11675     find_some_match(argvars, rettv, 3);
11676 }
11677 
11678 /*
11679  * "matchstr()" function
11680  */
11681     static void
11682 f_matchstr(argvars, rettv)
11683     typval_T	*argvars;
11684     typval_T	*rettv;
11685 {
11686     find_some_match(argvars, rettv, 2);
11687 }
11688 
11689 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11690 
11691     static void
11692 max_min(argvars, rettv, domax)
11693     typval_T	*argvars;
11694     typval_T	*rettv;
11695     int		domax;
11696 {
11697     long	n = 0;
11698     long	i;
11699     int		error = FALSE;
11700 
11701     if (argvars[0].v_type == VAR_LIST)
11702     {
11703 	list_T		*l;
11704 	listitem_T	*li;
11705 
11706 	l = argvars[0].vval.v_list;
11707 	if (l != NULL)
11708 	{
11709 	    li = l->lv_first;
11710 	    if (li != NULL)
11711 	    {
11712 		n = get_tv_number_chk(&li->li_tv, &error);
11713 		for (;;)
11714 		{
11715 		    li = li->li_next;
11716 		    if (li == NULL)
11717 			break;
11718 		    i = get_tv_number_chk(&li->li_tv, &error);
11719 		    if (domax ? i > n : i < n)
11720 			n = i;
11721 		}
11722 	    }
11723 	}
11724     }
11725     else if (argvars[0].v_type == VAR_DICT)
11726     {
11727 	dict_T		*d;
11728 	int		first = TRUE;
11729 	hashitem_T	*hi;
11730 	int		todo;
11731 
11732 	d = argvars[0].vval.v_dict;
11733 	if (d != NULL)
11734 	{
11735 	    todo = d->dv_hashtab.ht_used;
11736 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11737 	    {
11738 		if (!HASHITEM_EMPTY(hi))
11739 		{
11740 		    --todo;
11741 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11742 		    if (first)
11743 		    {
11744 			n = i;
11745 			first = FALSE;
11746 		    }
11747 		    else if (domax ? i > n : i < n)
11748 			n = i;
11749 		}
11750 	    }
11751 	}
11752     }
11753     else
11754 	EMSG(_(e_listdictarg));
11755     rettv->vval.v_number = error ? 0 : n;
11756 }
11757 
11758 /*
11759  * "max()" function
11760  */
11761     static void
11762 f_max(argvars, rettv)
11763     typval_T	*argvars;
11764     typval_T	*rettv;
11765 {
11766     max_min(argvars, rettv, TRUE);
11767 }
11768 
11769 /*
11770  * "min()" function
11771  */
11772     static void
11773 f_min(argvars, rettv)
11774     typval_T	*argvars;
11775     typval_T	*rettv;
11776 {
11777     max_min(argvars, rettv, FALSE);
11778 }
11779 
11780 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11781 
11782 /*
11783  * Create the directory in which "dir" is located, and higher levels when
11784  * needed.
11785  */
11786     static int
11787 mkdir_recurse(dir, prot)
11788     char_u	*dir;
11789     int		prot;
11790 {
11791     char_u	*p;
11792     char_u	*updir;
11793     int		r = FAIL;
11794 
11795     /* Get end of directory name in "dir".
11796      * We're done when it's "/" or "c:/". */
11797     p = gettail_sep(dir);
11798     if (p <= get_past_head(dir))
11799 	return OK;
11800 
11801     /* If the directory exists we're done.  Otherwise: create it.*/
11802     updir = vim_strnsave(dir, (int)(p - dir));
11803     if (updir == NULL)
11804 	return FAIL;
11805     if (mch_isdir(updir))
11806 	r = OK;
11807     else if (mkdir_recurse(updir, prot) == OK)
11808 	r = vim_mkdir_emsg(updir, prot);
11809     vim_free(updir);
11810     return r;
11811 }
11812 
11813 #ifdef vim_mkdir
11814 /*
11815  * "mkdir()" function
11816  */
11817     static void
11818 f_mkdir(argvars, rettv)
11819     typval_T	*argvars;
11820     typval_T	*rettv;
11821 {
11822     char_u	*dir;
11823     char_u	buf[NUMBUFLEN];
11824     int		prot = 0755;
11825 
11826     rettv->vval.v_number = FAIL;
11827     if (check_restricted() || check_secure())
11828 	return;
11829 
11830     dir = get_tv_string_buf(&argvars[0], buf);
11831     if (argvars[1].v_type != VAR_UNKNOWN)
11832     {
11833 	if (argvars[2].v_type != VAR_UNKNOWN)
11834 	    prot = get_tv_number_chk(&argvars[2], NULL);
11835 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11836 	    mkdir_recurse(dir, prot);
11837     }
11838     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11839 }
11840 #endif
11841 
11842 /*
11843  * "mode()" function
11844  */
11845 /*ARGSUSED*/
11846     static void
11847 f_mode(argvars, rettv)
11848     typval_T	*argvars;
11849     typval_T	*rettv;
11850 {
11851     char_u	buf[2];
11852 
11853 #ifdef FEAT_VISUAL
11854     if (VIsual_active)
11855     {
11856 	if (VIsual_select)
11857 	    buf[0] = VIsual_mode + 's' - 'v';
11858 	else
11859 	    buf[0] = VIsual_mode;
11860     }
11861     else
11862 #endif
11863 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11864 	buf[0] = 'r';
11865     else if (State & INSERT)
11866     {
11867 	if (State & REPLACE_FLAG)
11868 	    buf[0] = 'R';
11869 	else
11870 	    buf[0] = 'i';
11871     }
11872     else if (State & CMDLINE)
11873 	buf[0] = 'c';
11874     else
11875 	buf[0] = 'n';
11876 
11877     buf[1] = NUL;
11878     rettv->vval.v_string = vim_strsave(buf);
11879     rettv->v_type = VAR_STRING;
11880 }
11881 
11882 /*
11883  * "nextnonblank()" function
11884  */
11885     static void
11886 f_nextnonblank(argvars, rettv)
11887     typval_T	*argvars;
11888     typval_T	*rettv;
11889 {
11890     linenr_T	lnum;
11891 
11892     for (lnum = get_tv_lnum(argvars); ; ++lnum)
11893     {
11894 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
11895 	{
11896 	    lnum = 0;
11897 	    break;
11898 	}
11899 	if (*skipwhite(ml_get(lnum)) != NUL)
11900 	    break;
11901     }
11902     rettv->vval.v_number = lnum;
11903 }
11904 
11905 /*
11906  * "nr2char()" function
11907  */
11908     static void
11909 f_nr2char(argvars, rettv)
11910     typval_T	*argvars;
11911     typval_T	*rettv;
11912 {
11913     char_u	buf[NUMBUFLEN];
11914 
11915 #ifdef FEAT_MBYTE
11916     if (has_mbyte)
11917 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
11918     else
11919 #endif
11920     {
11921 	buf[0] = (char_u)get_tv_number(&argvars[0]);
11922 	buf[1] = NUL;
11923     }
11924     rettv->v_type = VAR_STRING;
11925     rettv->vval.v_string = vim_strsave(buf);
11926 }
11927 
11928 /*
11929  * "prevnonblank()" function
11930  */
11931     static void
11932 f_prevnonblank(argvars, rettv)
11933     typval_T	*argvars;
11934     typval_T	*rettv;
11935 {
11936     linenr_T	lnum;
11937 
11938     lnum = get_tv_lnum(argvars);
11939     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
11940 	lnum = 0;
11941     else
11942 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
11943 	    --lnum;
11944     rettv->vval.v_number = lnum;
11945 }
11946 
11947 #ifdef HAVE_STDARG_H
11948 /* This dummy va_list is here because:
11949  * - passing a NULL pointer doesn't work when va_list isn't a pointer
11950  * - locally in the function results in a "used before set" warning
11951  * - using va_start() to initialize it gives "function with fixed args" error */
11952 static va_list	ap;
11953 #endif
11954 
11955 /*
11956  * "printf()" function
11957  */
11958     static void
11959 f_printf(argvars, rettv)
11960     typval_T	*argvars;
11961     typval_T	*rettv;
11962 {
11963     rettv->v_type = VAR_STRING;
11964     rettv->vval.v_string = NULL;
11965 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
11966     {
11967 	char_u	buf[NUMBUFLEN];
11968 	int	len;
11969 	char_u	*s;
11970 	int	saved_did_emsg = did_emsg;
11971 	char	*fmt;
11972 
11973 	/* Get the required length, allocate the buffer and do it for real. */
11974 	did_emsg = FALSE;
11975 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
11976 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
11977 	if (!did_emsg)
11978 	{
11979 	    s = alloc(len + 1);
11980 	    if (s != NULL)
11981 	    {
11982 		rettv->vval.v_string = s;
11983 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
11984 	    }
11985 	}
11986 	did_emsg |= saved_did_emsg;
11987     }
11988 #endif
11989 }
11990 
11991 /*
11992  * "range()" function
11993  */
11994     static void
11995 f_range(argvars, rettv)
11996     typval_T	*argvars;
11997     typval_T	*rettv;
11998 {
11999     long	start;
12000     long	end;
12001     long	stride = 1;
12002     long	i;
12003     list_T	*l;
12004     listitem_T	*li;
12005     int		error = FALSE;
12006 
12007     start = get_tv_number_chk(&argvars[0], &error);
12008     if (argvars[1].v_type == VAR_UNKNOWN)
12009     {
12010 	end = start - 1;
12011 	start = 0;
12012     }
12013     else
12014     {
12015 	end = get_tv_number_chk(&argvars[1], &error);
12016 	if (argvars[2].v_type != VAR_UNKNOWN)
12017 	    stride = get_tv_number_chk(&argvars[2], &error);
12018     }
12019 
12020     rettv->vval.v_number = 0;
12021     if (error)
12022 	return;		/* type error; errmsg already given */
12023     if (stride == 0)
12024 	EMSG(_("E726: Stride is zero"));
12025     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12026 	EMSG(_("E727: Start past end"));
12027     else
12028     {
12029 	l = list_alloc();
12030 	if (l != NULL)
12031 	{
12032 	    rettv->v_type = VAR_LIST;
12033 	    rettv->vval.v_list = l;
12034 	    ++l->lv_refcount;
12035 
12036 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12037 	    {
12038 		li = listitem_alloc();
12039 		if (li == NULL)
12040 		    break;
12041 		li->li_tv.v_type = VAR_NUMBER;
12042 		li->li_tv.v_lock = 0;
12043 		li->li_tv.vval.v_number = i;
12044 		list_append(l, li);
12045 	    }
12046 	}
12047     }
12048 }
12049 
12050 /*
12051  * "readfile()" function
12052  */
12053     static void
12054 f_readfile(argvars, rettv)
12055     typval_T	*argvars;
12056     typval_T	*rettv;
12057 {
12058     int		binary = FALSE;
12059     char_u	*fname;
12060     FILE	*fd;
12061     list_T	*l;
12062     listitem_T	*li;
12063 #define FREAD_SIZE 200	    /* optimized for text lines */
12064     char_u	buf[FREAD_SIZE];
12065     int		readlen;    /* size of last fread() */
12066     int		buflen;	    /* nr of valid chars in buf[] */
12067     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12068     int		tolist;	    /* first byte in buf[] still to be put in list */
12069     int		chop;	    /* how many CR to chop off */
12070     char_u	*prev = NULL;	/* previously read bytes, if any */
12071     int		prevlen = 0;    /* length of "prev" if not NULL */
12072     char_u	*s;
12073     int		len;
12074     long	maxline = MAXLNUM;
12075     long	cnt = 0;
12076 
12077     if (argvars[1].v_type != VAR_UNKNOWN)
12078     {
12079 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12080 	    binary = TRUE;
12081 	if (argvars[2].v_type != VAR_UNKNOWN)
12082 	    maxline = get_tv_number(&argvars[2]);
12083     }
12084 
12085     l = list_alloc();
12086     if (l == NULL)
12087 	return;
12088     rettv->v_type = VAR_LIST;
12089     rettv->vval.v_list = l;
12090     l->lv_refcount = 1;
12091 
12092     /* Always open the file in binary mode, library functions have a mind of
12093      * their own about CR-LF conversion. */
12094     fname = get_tv_string(&argvars[0]);
12095     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12096     {
12097 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12098 	return;
12099     }
12100 
12101     filtd = 0;
12102     while (cnt < maxline || maxline < 0)
12103     {
12104 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12105 	buflen = filtd + readlen;
12106 	tolist = 0;
12107 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12108 	{
12109 	    if (buf[filtd] == '\n' || readlen <= 0)
12110 	    {
12111 		/* Only when in binary mode add an empty list item when the
12112 		 * last line ends in a '\n'. */
12113 		if (!binary && readlen == 0 && filtd == 0)
12114 		    break;
12115 
12116 		/* Found end-of-line or end-of-file: add a text line to the
12117 		 * list. */
12118 		chop = 0;
12119 		if (!binary)
12120 		    while (filtd - chop - 1 >= tolist
12121 					  && buf[filtd - chop - 1] == '\r')
12122 			++chop;
12123 		len = filtd - tolist - chop;
12124 		if (prev == NULL)
12125 		    s = vim_strnsave(buf + tolist, len);
12126 		else
12127 		{
12128 		    s = alloc((unsigned)(prevlen + len + 1));
12129 		    if (s != NULL)
12130 		    {
12131 			mch_memmove(s, prev, prevlen);
12132 			vim_free(prev);
12133 			prev = NULL;
12134 			mch_memmove(s + prevlen, buf + tolist, len);
12135 			s[prevlen + len] = NUL;
12136 		    }
12137 		}
12138 		tolist = filtd + 1;
12139 
12140 		li = listitem_alloc();
12141 		if (li == NULL)
12142 		{
12143 		    vim_free(s);
12144 		    break;
12145 		}
12146 		li->li_tv.v_type = VAR_STRING;
12147 		li->li_tv.v_lock = 0;
12148 		li->li_tv.vval.v_string = s;
12149 		list_append(l, li);
12150 
12151 		if (++cnt >= maxline && maxline >= 0)
12152 		    break;
12153 		if (readlen <= 0)
12154 		    break;
12155 	    }
12156 	    else if (buf[filtd] == NUL)
12157 		buf[filtd] = '\n';
12158 	}
12159 	if (readlen <= 0)
12160 	    break;
12161 
12162 	if (tolist == 0)
12163 	{
12164 	    /* "buf" is full, need to move text to an allocated buffer */
12165 	    if (prev == NULL)
12166 	    {
12167 		prev = vim_strnsave(buf, buflen);
12168 		prevlen = buflen;
12169 	    }
12170 	    else
12171 	    {
12172 		s = alloc((unsigned)(prevlen + buflen));
12173 		if (s != NULL)
12174 		{
12175 		    mch_memmove(s, prev, prevlen);
12176 		    mch_memmove(s + prevlen, buf, buflen);
12177 		    vim_free(prev);
12178 		    prev = s;
12179 		    prevlen += buflen;
12180 		}
12181 	    }
12182 	    filtd = 0;
12183 	}
12184 	else
12185 	{
12186 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12187 	    filtd -= tolist;
12188 	}
12189     }
12190 
12191     /*
12192      * For a negative line count use only the lines at the end of the file,
12193      * free the rest.
12194      */
12195     if (maxline < 0)
12196 	while (cnt > -maxline)
12197 	{
12198 	    listitem_remove(l, l->lv_first);
12199 	    --cnt;
12200 	}
12201 
12202     vim_free(prev);
12203     fclose(fd);
12204 }
12205 
12206 
12207 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12208 static void make_connection __ARGS((void));
12209 static int check_connection __ARGS((void));
12210 
12211     static void
12212 make_connection()
12213 {
12214     if (X_DISPLAY == NULL
12215 # ifdef FEAT_GUI
12216 	    && !gui.in_use
12217 # endif
12218 	    )
12219     {
12220 	x_force_connect = TRUE;
12221 	setup_term_clip();
12222 	x_force_connect = FALSE;
12223     }
12224 }
12225 
12226     static int
12227 check_connection()
12228 {
12229     make_connection();
12230     if (X_DISPLAY == NULL)
12231     {
12232 	EMSG(_("E240: No connection to Vim server"));
12233 	return FAIL;
12234     }
12235     return OK;
12236 }
12237 #endif
12238 
12239 #ifdef FEAT_CLIENTSERVER
12240 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12241 
12242     static void
12243 remote_common(argvars, rettv, expr)
12244     typval_T	*argvars;
12245     typval_T	*rettv;
12246     int		expr;
12247 {
12248     char_u	*server_name;
12249     char_u	*keys;
12250     char_u	*r = NULL;
12251     char_u	buf[NUMBUFLEN];
12252 # ifdef WIN32
12253     HWND	w;
12254 # else
12255     Window	w;
12256 # endif
12257 
12258     if (check_restricted() || check_secure())
12259 	return;
12260 
12261 # ifdef FEAT_X11
12262     if (check_connection() == FAIL)
12263 	return;
12264 # endif
12265 
12266     server_name = get_tv_string_chk(&argvars[0]);
12267     if (server_name == NULL)
12268 	return;		/* type error; errmsg already given */
12269     keys = get_tv_string_buf(&argvars[1], buf);
12270 # ifdef WIN32
12271     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12272 # else
12273     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12274 									  < 0)
12275 # endif
12276     {
12277 	if (r != NULL)
12278 	    EMSG(r);		/* sending worked but evaluation failed */
12279 	else
12280 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12281 	return;
12282     }
12283 
12284     rettv->vval.v_string = r;
12285 
12286     if (argvars[2].v_type != VAR_UNKNOWN)
12287     {
12288 	dictitem_T	v;
12289 	char_u		str[30];
12290 	char_u		*idvar;
12291 
12292 	sprintf((char *)str, "0x%x", (unsigned int)w);
12293 	v.di_tv.v_type = VAR_STRING;
12294 	v.di_tv.vval.v_string = vim_strsave(str);
12295 	idvar = get_tv_string_chk(&argvars[2]);
12296 	if (idvar != NULL)
12297 	    set_var(idvar, &v.di_tv, FALSE);
12298 	vim_free(v.di_tv.vval.v_string);
12299     }
12300 }
12301 #endif
12302 
12303 /*
12304  * "remote_expr()" function
12305  */
12306 /*ARGSUSED*/
12307     static void
12308 f_remote_expr(argvars, rettv)
12309     typval_T	*argvars;
12310     typval_T	*rettv;
12311 {
12312     rettv->v_type = VAR_STRING;
12313     rettv->vval.v_string = NULL;
12314 #ifdef FEAT_CLIENTSERVER
12315     remote_common(argvars, rettv, TRUE);
12316 #endif
12317 }
12318 
12319 /*
12320  * "remote_foreground()" function
12321  */
12322 /*ARGSUSED*/
12323     static void
12324 f_remote_foreground(argvars, rettv)
12325     typval_T	*argvars;
12326     typval_T	*rettv;
12327 {
12328     rettv->vval.v_number = 0;
12329 #ifdef FEAT_CLIENTSERVER
12330 # ifdef WIN32
12331     /* On Win32 it's done in this application. */
12332     {
12333 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12334 
12335 	if (server_name != NULL)
12336 	    serverForeground(server_name);
12337     }
12338 # else
12339     /* Send a foreground() expression to the server. */
12340     argvars[1].v_type = VAR_STRING;
12341     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12342     argvars[2].v_type = VAR_UNKNOWN;
12343     remote_common(argvars, rettv, TRUE);
12344     vim_free(argvars[1].vval.v_string);
12345 # endif
12346 #endif
12347 }
12348 
12349 /*ARGSUSED*/
12350     static void
12351 f_remote_peek(argvars, rettv)
12352     typval_T	*argvars;
12353     typval_T	*rettv;
12354 {
12355 #ifdef FEAT_CLIENTSERVER
12356     dictitem_T	v;
12357     char_u	*s = NULL;
12358 # ifdef WIN32
12359     int		n = 0;
12360 # endif
12361     char_u	*serverid;
12362 
12363     if (check_restricted() || check_secure())
12364     {
12365 	rettv->vval.v_number = -1;
12366 	return;
12367     }
12368     serverid = get_tv_string_chk(&argvars[0]);
12369     if (serverid == NULL)
12370     {
12371 	rettv->vval.v_number = -1;
12372 	return;		/* type error; errmsg already given */
12373     }
12374 # ifdef WIN32
12375     sscanf(serverid, "%x", &n);
12376     if (n == 0)
12377 	rettv->vval.v_number = -1;
12378     else
12379     {
12380 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12381 	rettv->vval.v_number = (s != NULL);
12382     }
12383 # else
12384     rettv->vval.v_number = 0;
12385     if (check_connection() == FAIL)
12386 	return;
12387 
12388     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12389 						serverStrToWin(serverid), &s);
12390 # endif
12391 
12392     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12393     {
12394 	char_u		*retvar;
12395 
12396 	v.di_tv.v_type = VAR_STRING;
12397 	v.di_tv.vval.v_string = vim_strsave(s);
12398 	retvar = get_tv_string_chk(&argvars[1]);
12399 	if (retvar != NULL)
12400 	    set_var(retvar, &v.di_tv, FALSE);
12401 	vim_free(v.di_tv.vval.v_string);
12402     }
12403 #else
12404     rettv->vval.v_number = -1;
12405 #endif
12406 }
12407 
12408 /*ARGSUSED*/
12409     static void
12410 f_remote_read(argvars, rettv)
12411     typval_T	*argvars;
12412     typval_T	*rettv;
12413 {
12414     char_u	*r = NULL;
12415 
12416 #ifdef FEAT_CLIENTSERVER
12417     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12418 
12419     if (serverid != NULL && !check_restricted() && !check_secure())
12420     {
12421 # ifdef WIN32
12422 	/* The server's HWND is encoded in the 'id' parameter */
12423 	int		n = 0;
12424 
12425 	sscanf(serverid, "%x", &n);
12426 	if (n != 0)
12427 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12428 	if (r == NULL)
12429 # else
12430 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12431 		serverStrToWin(serverid), &r, FALSE) < 0)
12432 # endif
12433 	    EMSG(_("E277: Unable to read a server reply"));
12434     }
12435 #endif
12436     rettv->v_type = VAR_STRING;
12437     rettv->vval.v_string = r;
12438 }
12439 
12440 /*
12441  * "remote_send()" function
12442  */
12443 /*ARGSUSED*/
12444     static void
12445 f_remote_send(argvars, rettv)
12446     typval_T	*argvars;
12447     typval_T	*rettv;
12448 {
12449     rettv->v_type = VAR_STRING;
12450     rettv->vval.v_string = NULL;
12451 #ifdef FEAT_CLIENTSERVER
12452     remote_common(argvars, rettv, FALSE);
12453 #endif
12454 }
12455 
12456 /*
12457  * "remove()" function
12458  */
12459     static void
12460 f_remove(argvars, rettv)
12461     typval_T	*argvars;
12462     typval_T	*rettv;
12463 {
12464     list_T	*l;
12465     listitem_T	*item, *item2;
12466     listitem_T	*li;
12467     long	idx;
12468     long	end;
12469     char_u	*key;
12470     dict_T	*d;
12471     dictitem_T	*di;
12472 
12473     rettv->vval.v_number = 0;
12474     if (argvars[0].v_type == VAR_DICT)
12475     {
12476 	if (argvars[2].v_type != VAR_UNKNOWN)
12477 	    EMSG2(_(e_toomanyarg), "remove()");
12478 	else if ((d = argvars[0].vval.v_dict) != NULL
12479 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12480 	{
12481 	    key = get_tv_string_chk(&argvars[1]);
12482 	    if (key != NULL)
12483 	    {
12484 		di = dict_find(d, key, -1);
12485 		if (di == NULL)
12486 		    EMSG2(_(e_dictkey), key);
12487 		else
12488 		{
12489 		    *rettv = di->di_tv;
12490 		    init_tv(&di->di_tv);
12491 		    dictitem_remove(d, di);
12492 		}
12493 	    }
12494 	}
12495     }
12496     else if (argvars[0].v_type != VAR_LIST)
12497 	EMSG2(_(e_listdictarg), "remove()");
12498     else if ((l = argvars[0].vval.v_list) != NULL
12499 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12500     {
12501 	int	    error = FALSE;
12502 
12503 	idx = get_tv_number_chk(&argvars[1], &error);
12504 	if (error)
12505 	    ;		/* type error: do nothing, errmsg already given */
12506 	else if ((item = list_find(l, idx)) == NULL)
12507 	    EMSGN(_(e_listidx), idx);
12508 	else
12509 	{
12510 	    if (argvars[2].v_type == VAR_UNKNOWN)
12511 	    {
12512 		/* Remove one item, return its value. */
12513 		list_remove(l, item, item);
12514 		*rettv = item->li_tv;
12515 		vim_free(item);
12516 	    }
12517 	    else
12518 	    {
12519 		/* Remove range of items, return list with values. */
12520 		end = get_tv_number_chk(&argvars[2], &error);
12521 		if (error)
12522 		    ;		/* type error: do nothing */
12523 		else if ((item2 = list_find(l, end)) == NULL)
12524 		    EMSGN(_(e_listidx), end);
12525 		else
12526 		{
12527 		    int	    cnt = 0;
12528 
12529 		    for (li = item; li != NULL; li = li->li_next)
12530 		    {
12531 			++cnt;
12532 			if (li == item2)
12533 			    break;
12534 		    }
12535 		    if (li == NULL)  /* didn't find "item2" after "item" */
12536 			EMSG(_(e_invrange));
12537 		    else
12538 		    {
12539 			list_remove(l, item, item2);
12540 			l = list_alloc();
12541 			if (l != NULL)
12542 			{
12543 			    rettv->v_type = VAR_LIST;
12544 			    rettv->vval.v_list = l;
12545 			    l->lv_first = item;
12546 			    l->lv_last = item2;
12547 			    l->lv_refcount = 1;
12548 			    item->li_prev = NULL;
12549 			    item2->li_next = NULL;
12550 			    l->lv_len = cnt;
12551 			}
12552 		    }
12553 		}
12554 	    }
12555 	}
12556     }
12557 }
12558 
12559 /*
12560  * "rename({from}, {to})" function
12561  */
12562     static void
12563 f_rename(argvars, rettv)
12564     typval_T	*argvars;
12565     typval_T	*rettv;
12566 {
12567     char_u	buf[NUMBUFLEN];
12568 
12569     if (check_restricted() || check_secure())
12570 	rettv->vval.v_number = -1;
12571     else
12572 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12573 				      get_tv_string_buf(&argvars[1], buf));
12574 }
12575 
12576 /*
12577  * "repeat()" function
12578  */
12579 /*ARGSUSED*/
12580     static void
12581 f_repeat(argvars, rettv)
12582     typval_T	*argvars;
12583     typval_T	*rettv;
12584 {
12585     char_u	*p;
12586     int		n;
12587     int		slen;
12588     int		len;
12589     char_u	*r;
12590     int		i;
12591     list_T	*l;
12592 
12593     n = get_tv_number(&argvars[1]);
12594     if (argvars[0].v_type == VAR_LIST)
12595     {
12596 	l = list_alloc();
12597 	if (l != NULL && argvars[0].vval.v_list != NULL)
12598 	{
12599 	    l->lv_refcount = 1;
12600 	    while (n-- > 0)
12601 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12602 		    break;
12603 	}
12604 	rettv->v_type = VAR_LIST;
12605 	rettv->vval.v_list = l;
12606     }
12607     else
12608     {
12609 	p = get_tv_string(&argvars[0]);
12610 	rettv->v_type = VAR_STRING;
12611 	rettv->vval.v_string = NULL;
12612 
12613 	slen = (int)STRLEN(p);
12614 	len = slen * n;
12615 	if (len <= 0)
12616 	    return;
12617 
12618 	r = alloc(len + 1);
12619 	if (r != NULL)
12620 	{
12621 	    for (i = 0; i < n; i++)
12622 		mch_memmove(r + i * slen, p, (size_t)slen);
12623 	    r[len] = NUL;
12624 	}
12625 
12626 	rettv->vval.v_string = r;
12627     }
12628 }
12629 
12630 /*
12631  * "resolve()" function
12632  */
12633     static void
12634 f_resolve(argvars, rettv)
12635     typval_T	*argvars;
12636     typval_T	*rettv;
12637 {
12638     char_u	*p;
12639 
12640     p = get_tv_string(&argvars[0]);
12641 #ifdef FEAT_SHORTCUT
12642     {
12643 	char_u	*v = NULL;
12644 
12645 	v = mch_resolve_shortcut(p);
12646 	if (v != NULL)
12647 	    rettv->vval.v_string = v;
12648 	else
12649 	    rettv->vval.v_string = vim_strsave(p);
12650     }
12651 #else
12652 # ifdef HAVE_READLINK
12653     {
12654 	char_u	buf[MAXPATHL + 1];
12655 	char_u	*cpy;
12656 	int	len;
12657 	char_u	*remain = NULL;
12658 	char_u	*q;
12659 	int	is_relative_to_current = FALSE;
12660 	int	has_trailing_pathsep = FALSE;
12661 	int	limit = 100;
12662 
12663 	p = vim_strsave(p);
12664 
12665 	if (p[0] == '.' && (vim_ispathsep(p[1])
12666 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12667 	    is_relative_to_current = TRUE;
12668 
12669 	len = STRLEN(p);
12670 	if (len > 0 && after_pathsep(p, p + len))
12671 	    has_trailing_pathsep = TRUE;
12672 
12673 	q = getnextcomp(p);
12674 	if (*q != NUL)
12675 	{
12676 	    /* Separate the first path component in "p", and keep the
12677 	     * remainder (beginning with the path separator). */
12678 	    remain = vim_strsave(q - 1);
12679 	    q[-1] = NUL;
12680 	}
12681 
12682 	for (;;)
12683 	{
12684 	    for (;;)
12685 	    {
12686 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12687 		if (len <= 0)
12688 		    break;
12689 		buf[len] = NUL;
12690 
12691 		if (limit-- == 0)
12692 		{
12693 		    vim_free(p);
12694 		    vim_free(remain);
12695 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12696 		    rettv->vval.v_string = NULL;
12697 		    goto fail;
12698 		}
12699 
12700 		/* Ensure that the result will have a trailing path separator
12701 		 * if the argument has one. */
12702 		if (remain == NULL && has_trailing_pathsep)
12703 		    add_pathsep(buf);
12704 
12705 		/* Separate the first path component in the link value and
12706 		 * concatenate the remainders. */
12707 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12708 		if (*q != NUL)
12709 		{
12710 		    if (remain == NULL)
12711 			remain = vim_strsave(q - 1);
12712 		    else
12713 		    {
12714 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12715 			if (cpy != NULL)
12716 			{
12717 			    STRCAT(cpy, remain);
12718 			    vim_free(remain);
12719 			    remain = cpy;
12720 			}
12721 		    }
12722 		    q[-1] = NUL;
12723 		}
12724 
12725 		q = gettail(p);
12726 		if (q > p && *q == NUL)
12727 		{
12728 		    /* Ignore trailing path separator. */
12729 		    q[-1] = NUL;
12730 		    q = gettail(p);
12731 		}
12732 		if (q > p && !mch_isFullName(buf))
12733 		{
12734 		    /* symlink is relative to directory of argument */
12735 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12736 		    if (cpy != NULL)
12737 		    {
12738 			STRCPY(cpy, p);
12739 			STRCPY(gettail(cpy), buf);
12740 			vim_free(p);
12741 			p = cpy;
12742 		    }
12743 		}
12744 		else
12745 		{
12746 		    vim_free(p);
12747 		    p = vim_strsave(buf);
12748 		}
12749 	    }
12750 
12751 	    if (remain == NULL)
12752 		break;
12753 
12754 	    /* Append the first path component of "remain" to "p". */
12755 	    q = getnextcomp(remain + 1);
12756 	    len = q - remain - (*q != NUL);
12757 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12758 	    if (cpy != NULL)
12759 	    {
12760 		STRNCAT(cpy, remain, len);
12761 		vim_free(p);
12762 		p = cpy;
12763 	    }
12764 	    /* Shorten "remain". */
12765 	    if (*q != NUL)
12766 		STRCPY(remain, q - 1);
12767 	    else
12768 	    {
12769 		vim_free(remain);
12770 		remain = NULL;
12771 	    }
12772 	}
12773 
12774 	/* If the result is a relative path name, make it explicitly relative to
12775 	 * the current directory if and only if the argument had this form. */
12776 	if (!vim_ispathsep(*p))
12777 	{
12778 	    if (is_relative_to_current
12779 		    && *p != NUL
12780 		    && !(p[0] == '.'
12781 			&& (p[1] == NUL
12782 			    || vim_ispathsep(p[1])
12783 			    || (p[1] == '.'
12784 				&& (p[2] == NUL
12785 				    || vim_ispathsep(p[2]))))))
12786 	    {
12787 		/* Prepend "./". */
12788 		cpy = concat_str((char_u *)"./", p);
12789 		if (cpy != NULL)
12790 		{
12791 		    vim_free(p);
12792 		    p = cpy;
12793 		}
12794 	    }
12795 	    else if (!is_relative_to_current)
12796 	    {
12797 		/* Strip leading "./". */
12798 		q = p;
12799 		while (q[0] == '.' && vim_ispathsep(q[1]))
12800 		    q += 2;
12801 		if (q > p)
12802 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12803 	    }
12804 	}
12805 
12806 	/* Ensure that the result will have no trailing path separator
12807 	 * if the argument had none.  But keep "/" or "//". */
12808 	if (!has_trailing_pathsep)
12809 	{
12810 	    q = p + STRLEN(p);
12811 	    if (after_pathsep(p, q))
12812 		*gettail_sep(p) = NUL;
12813 	}
12814 
12815 	rettv->vval.v_string = p;
12816     }
12817 # else
12818     rettv->vval.v_string = vim_strsave(p);
12819 # endif
12820 #endif
12821 
12822     simplify_filename(rettv->vval.v_string);
12823 
12824 #ifdef HAVE_READLINK
12825 fail:
12826 #endif
12827     rettv->v_type = VAR_STRING;
12828 }
12829 
12830 /*
12831  * "reverse({list})" function
12832  */
12833     static void
12834 f_reverse(argvars, rettv)
12835     typval_T	*argvars;
12836     typval_T	*rettv;
12837 {
12838     list_T	*l;
12839     listitem_T	*li, *ni;
12840 
12841     rettv->vval.v_number = 0;
12842     if (argvars[0].v_type != VAR_LIST)
12843 	EMSG2(_(e_listarg), "reverse()");
12844     else if ((l = argvars[0].vval.v_list) != NULL
12845 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12846     {
12847 	li = l->lv_last;
12848 	l->lv_first = l->lv_last = NULL;
12849 	l->lv_len = 0;
12850 	while (li != NULL)
12851 	{
12852 	    ni = li->li_prev;
12853 	    list_append(l, li);
12854 	    li = ni;
12855 	}
12856 	rettv->vval.v_list = l;
12857 	rettv->v_type = VAR_LIST;
12858 	++l->lv_refcount;
12859     }
12860 }
12861 
12862 #define SP_NOMOVE	1	/* don't move cursor */
12863 #define SP_REPEAT	2	/* repeat to find outer pair */
12864 #define SP_RETCOUNT	4	/* return matchcount */
12865 #define SP_SETPCMARK	8       /* set previous context mark */
12866 
12867 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12868 
12869 /*
12870  * Get flags for a search function.
12871  * Possibly sets "p_ws".
12872  * Returns BACKWARD, FORWARD or zero (for an error).
12873  */
12874     static int
12875 get_search_arg(varp, flagsp)
12876     typval_T	*varp;
12877     int		*flagsp;
12878 {
12879     int		dir = FORWARD;
12880     char_u	*flags;
12881     char_u	nbuf[NUMBUFLEN];
12882     int		mask;
12883 
12884     if (varp->v_type != VAR_UNKNOWN)
12885     {
12886 	flags = get_tv_string_buf_chk(varp, nbuf);
12887 	if (flags == NULL)
12888 	    return 0;		/* type error; errmsg already given */
12889 	while (*flags != NUL)
12890 	{
12891 	    switch (*flags)
12892 	    {
12893 		case 'b': dir = BACKWARD; break;
12894 		case 'w': p_ws = TRUE; break;
12895 		case 'W': p_ws = FALSE; break;
12896 		default:  mask = 0;
12897 			  if (flagsp != NULL)
12898 			     switch (*flags)
12899 			     {
12900 				 case 'n': mask = SP_NOMOVE; break;
12901 				 case 'r': mask = SP_REPEAT; break;
12902 				 case 'm': mask = SP_RETCOUNT; break;
12903 				 case 's': mask = SP_SETPCMARK; break;
12904 			     }
12905 			  if (mask == 0)
12906 			  {
12907 			      EMSG2(_(e_invarg2), flags);
12908 			      dir = 0;
12909 			  }
12910 			  else
12911 			      *flagsp |= mask;
12912 	    }
12913 	    if (dir == 0)
12914 		break;
12915 	    ++flags;
12916 	}
12917     }
12918     return dir;
12919 }
12920 
12921 /*
12922  * "search()" function
12923  */
12924     static void
12925 f_search(argvars, rettv)
12926     typval_T	*argvars;
12927     typval_T	*rettv;
12928 {
12929     char_u	*pat;
12930     pos_T	pos;
12931     pos_T	save_cursor;
12932     int		save_p_ws = p_ws;
12933     int		dir;
12934     int		flags = 0;
12935 
12936     rettv->vval.v_number = 0;	/* default: FAIL */
12937 
12938     pat = get_tv_string(&argvars[0]);
12939     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
12940     if (dir == 0)
12941 	goto theend;
12942     /*
12943      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
12944      * Check to make sure only those flags are set.
12945      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
12946      * flags cannot be set. Check for that condition also.
12947      */
12948     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
12949 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
12950     {
12951 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12952 	goto theend;
12953     }
12954 
12955     pos = save_cursor = curwin->w_cursor;
12956     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
12957 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
12958     {
12959 	rettv->vval.v_number = pos.lnum;
12960 	if (flags & SP_SETPCMARK)
12961 	    setpcmark();
12962 	curwin->w_cursor = pos;
12963 	/* "/$" will put the cursor after the end of the line, may need to
12964 	 * correct that here */
12965 	check_cursor();
12966     }
12967 
12968     /* If 'n' flag is used: restore cursor position. */
12969     if (flags & SP_NOMOVE)
12970 	curwin->w_cursor = save_cursor;
12971 theend:
12972     p_ws = save_p_ws;
12973 }
12974 
12975 /*
12976  * "searchpair()" function
12977  */
12978     static void
12979 f_searchpair(argvars, rettv)
12980     typval_T	*argvars;
12981     typval_T	*rettv;
12982 {
12983     char_u	*spat, *mpat, *epat;
12984     char_u	*skip;
12985     int		save_p_ws = p_ws;
12986     int		dir;
12987     int		flags = 0;
12988     char_u	nbuf1[NUMBUFLEN];
12989     char_u	nbuf2[NUMBUFLEN];
12990     char_u	nbuf3[NUMBUFLEN];
12991 
12992     rettv->vval.v_number = 0;	/* default: FAIL */
12993 
12994     /* Get the three pattern arguments: start, middle, end. */
12995     spat = get_tv_string_chk(&argvars[0]);
12996     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
12997     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
12998     if (spat == NULL || mpat == NULL || epat == NULL)
12999 	goto theend;	    /* type error */
13000 
13001     /* Handle the optional fourth argument: flags */
13002     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13003     if (dir == 0)
13004 	goto theend;
13005     /*
13006      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13007      */
13008     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
13009     {
13010 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13011 	goto theend;
13012     }
13013 
13014     /* Optional fifth argument: skip expresion */
13015     if (argvars[3].v_type == VAR_UNKNOWN
13016 	    || argvars[4].v_type == VAR_UNKNOWN)
13017 	skip = (char_u *)"";
13018     else
13019 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13020     if (skip == NULL)
13021 	goto theend;	    /* type error */
13022 
13023     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
13024 
13025 theend:
13026     p_ws = save_p_ws;
13027 }
13028 
13029 /*
13030  * Search for a start/middle/end thing.
13031  * Used by searchpair(), see its documentation for the details.
13032  * Returns 0 or -1 for no match,
13033  */
13034     long
13035 do_searchpair(spat, mpat, epat, dir, skip, flags)
13036     char_u	*spat;	    /* start pattern */
13037     char_u	*mpat;	    /* middle pattern */
13038     char_u	*epat;	    /* end pattern */
13039     int		dir;	    /* BACKWARD or FORWARD */
13040     char_u	*skip;	    /* skip expression */
13041     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
13042 {
13043     char_u	*save_cpo;
13044     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13045     long	retval = 0;
13046     pos_T	pos;
13047     pos_T	firstpos;
13048     pos_T	foundpos;
13049     pos_T	save_cursor;
13050     pos_T	save_pos;
13051     int		n;
13052     int		r;
13053     int		nest = 1;
13054     int		err;
13055 
13056     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13057     save_cpo = p_cpo;
13058     p_cpo = (char_u *)"";
13059 
13060     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13061      * start/middle/end (pat3, for the top pair). */
13062     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13063     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13064     if (pat2 == NULL || pat3 == NULL)
13065 	goto theend;
13066     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13067     if (*mpat == NUL)
13068 	STRCPY(pat3, pat2);
13069     else
13070 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13071 							    spat, epat, mpat);
13072 
13073     save_cursor = curwin->w_cursor;
13074     pos = curwin->w_cursor;
13075     firstpos.lnum = 0;
13076     foundpos.lnum = 0;
13077     pat = pat3;
13078     for (;;)
13079     {
13080 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13081 						      SEARCH_KEEP, RE_SEARCH);
13082 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13083 	    /* didn't find it or found the first match again: FAIL */
13084 	    break;
13085 
13086 	if (firstpos.lnum == 0)
13087 	    firstpos = pos;
13088 	if (equalpos(pos, foundpos))
13089 	{
13090 	    /* Found the same position again.  Can happen with a pattern that
13091 	     * has "\zs" at the end and searching backwards.  Advance one
13092 	     * character and try again. */
13093 	    if (dir == BACKWARD)
13094 		decl(&pos);
13095 	    else
13096 		incl(&pos);
13097 	}
13098 	foundpos = pos;
13099 
13100 	/* If the skip pattern matches, ignore this match. */
13101 	if (*skip != NUL)
13102 	{
13103 	    save_pos = curwin->w_cursor;
13104 	    curwin->w_cursor = pos;
13105 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13106 	    curwin->w_cursor = save_pos;
13107 	    if (err)
13108 	    {
13109 		/* Evaluating {skip} caused an error, break here. */
13110 		curwin->w_cursor = save_cursor;
13111 		retval = -1;
13112 		break;
13113 	    }
13114 	    if (r)
13115 		continue;
13116 	}
13117 
13118 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13119 	{
13120 	    /* Found end when searching backwards or start when searching
13121 	     * forward: nested pair. */
13122 	    ++nest;
13123 	    pat = pat2;		/* nested, don't search for middle */
13124 	}
13125 	else
13126 	{
13127 	    /* Found end when searching forward or start when searching
13128 	     * backward: end of (nested) pair; or found middle in outer pair. */
13129 	    if (--nest == 1)
13130 		pat = pat3;	/* outer level, search for middle */
13131 	}
13132 
13133 	if (nest == 0)
13134 	{
13135 	    /* Found the match: return matchcount or line number. */
13136 	    if (flags & SP_RETCOUNT)
13137 		++retval;
13138 	    else
13139 		retval = pos.lnum;
13140 	    if (flags & SP_SETPCMARK)
13141 		setpcmark();
13142 	    curwin->w_cursor = pos;
13143 	    if (!(flags & SP_REPEAT))
13144 		break;
13145 	    nest = 1;	    /* search for next unmatched */
13146 	}
13147     }
13148 
13149     /* If 'n' flag is used or search failed: restore cursor position. */
13150     if ((flags & SP_NOMOVE) || retval == 0)
13151 	curwin->w_cursor = save_cursor;
13152 
13153 theend:
13154     vim_free(pat2);
13155     vim_free(pat3);
13156     p_cpo = save_cpo;
13157 
13158     return retval;
13159 }
13160 
13161 /*ARGSUSED*/
13162     static void
13163 f_server2client(argvars, rettv)
13164     typval_T	*argvars;
13165     typval_T	*rettv;
13166 {
13167 #ifdef FEAT_CLIENTSERVER
13168     char_u	buf[NUMBUFLEN];
13169     char_u	*server = get_tv_string_chk(&argvars[0]);
13170     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13171 
13172     rettv->vval.v_number = -1;
13173     if (server == NULL || reply == NULL)
13174 	return;
13175     if (check_restricted() || check_secure())
13176 	return;
13177 # ifdef FEAT_X11
13178     if (check_connection() == FAIL)
13179 	return;
13180 # endif
13181 
13182     if (serverSendReply(server, reply) < 0)
13183     {
13184 	EMSG(_("E258: Unable to send to client"));
13185 	return;
13186     }
13187     rettv->vval.v_number = 0;
13188 #else
13189     rettv->vval.v_number = -1;
13190 #endif
13191 }
13192 
13193 /*ARGSUSED*/
13194     static void
13195 f_serverlist(argvars, rettv)
13196     typval_T	*argvars;
13197     typval_T	*rettv;
13198 {
13199     char_u	*r = NULL;
13200 
13201 #ifdef FEAT_CLIENTSERVER
13202 # ifdef WIN32
13203     r = serverGetVimNames();
13204 # else
13205     make_connection();
13206     if (X_DISPLAY != NULL)
13207 	r = serverGetVimNames(X_DISPLAY);
13208 # endif
13209 #endif
13210     rettv->v_type = VAR_STRING;
13211     rettv->vval.v_string = r;
13212 }
13213 
13214 /*
13215  * "setbufvar()" function
13216  */
13217 /*ARGSUSED*/
13218     static void
13219 f_setbufvar(argvars, rettv)
13220     typval_T	*argvars;
13221     typval_T	*rettv;
13222 {
13223     buf_T	*buf;
13224 #ifdef FEAT_AUTOCMD
13225     aco_save_T	aco;
13226 #else
13227     buf_T	*save_curbuf;
13228 #endif
13229     char_u	*varname, *bufvarname;
13230     typval_T	*varp;
13231     char_u	nbuf[NUMBUFLEN];
13232 
13233     rettv->vval.v_number = 0;
13234 
13235     if (check_restricted() || check_secure())
13236 	return;
13237     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13238     varname = get_tv_string_chk(&argvars[1]);
13239     buf = get_buf_tv(&argvars[0]);
13240     varp = &argvars[2];
13241 
13242     if (buf != NULL && varname != NULL && varp != NULL)
13243     {
13244 	/* set curbuf to be our buf, temporarily */
13245 #ifdef FEAT_AUTOCMD
13246 	aucmd_prepbuf(&aco, buf);
13247 #else
13248 	save_curbuf = curbuf;
13249 	curbuf = buf;
13250 #endif
13251 
13252 	if (*varname == '&')
13253 	{
13254 	    long	numval;
13255 	    char_u	*strval;
13256 	    int		error = FALSE;
13257 
13258 	    ++varname;
13259 	    numval = get_tv_number_chk(varp, &error);
13260 	    strval = get_tv_string_buf_chk(varp, nbuf);
13261 	    if (!error && strval != NULL)
13262 		set_option_value(varname, numval, strval, OPT_LOCAL);
13263 	}
13264 	else
13265 	{
13266 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13267 	    if (bufvarname != NULL)
13268 	    {
13269 		STRCPY(bufvarname, "b:");
13270 		STRCPY(bufvarname + 2, varname);
13271 		set_var(bufvarname, varp, TRUE);
13272 		vim_free(bufvarname);
13273 	    }
13274 	}
13275 
13276 	/* reset notion of buffer */
13277 #ifdef FEAT_AUTOCMD
13278 	aucmd_restbuf(&aco);
13279 #else
13280 	curbuf = save_curbuf;
13281 #endif
13282     }
13283 }
13284 
13285 /*
13286  * "setcmdpos()" function
13287  */
13288     static void
13289 f_setcmdpos(argvars, rettv)
13290     typval_T	*argvars;
13291     typval_T	*rettv;
13292 {
13293     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13294 
13295     if (pos >= 0)
13296 	rettv->vval.v_number = set_cmdline_pos(pos);
13297 }
13298 
13299 /*
13300  * "setline()" function
13301  */
13302     static void
13303 f_setline(argvars, rettv)
13304     typval_T	*argvars;
13305     typval_T	*rettv;
13306 {
13307     linenr_T	lnum;
13308     char_u	*line = NULL;
13309     list_T	*l = NULL;
13310     listitem_T	*li = NULL;
13311     long	added = 0;
13312     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13313 
13314     lnum = get_tv_lnum(&argvars[0]);
13315     if (argvars[1].v_type == VAR_LIST)
13316     {
13317 	l = argvars[1].vval.v_list;
13318 	li = l->lv_first;
13319     }
13320     else
13321 	line = get_tv_string_chk(&argvars[1]);
13322 
13323     rettv->vval.v_number = 0;		/* OK */
13324     for (;;)
13325     {
13326 	if (l != NULL)
13327 	{
13328 	    /* list argument, get next string */
13329 	    if (li == NULL)
13330 		break;
13331 	    line = get_tv_string_chk(&li->li_tv);
13332 	    li = li->li_next;
13333 	}
13334 
13335 	rettv->vval.v_number = 1;	/* FAIL */
13336 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13337 	    break;
13338 	if (lnum <= curbuf->b_ml.ml_line_count)
13339 	{
13340 	    /* existing line, replace it */
13341 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13342 	    {
13343 		changed_bytes(lnum, 0);
13344 		check_cursor_col();
13345 		rettv->vval.v_number = 0;	/* OK */
13346 	    }
13347 	}
13348 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13349 	{
13350 	    /* lnum is one past the last line, append the line */
13351 	    ++added;
13352 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13353 		rettv->vval.v_number = 0;	/* OK */
13354 	}
13355 
13356 	if (l == NULL)			/* only one string argument */
13357 	    break;
13358 	++lnum;
13359     }
13360 
13361     if (added > 0)
13362 	appended_lines_mark(lcount, added);
13363 }
13364 
13365 /*
13366  * "setqflist()" function
13367  */
13368 /*ARGSUSED*/
13369     static void
13370 f_setqflist(argvars, rettv)
13371     typval_T	*argvars;
13372     typval_T	*rettv;
13373 {
13374     char_u	*act;
13375     int		action = ' ';
13376 
13377     rettv->vval.v_number = -1;
13378 
13379 #ifdef FEAT_QUICKFIX
13380     if (argvars[0].v_type != VAR_LIST)
13381 	EMSG(_(e_listreq));
13382     else
13383     {
13384 	list_T  *l = argvars[0].vval.v_list;
13385 
13386 	if (argvars[1].v_type == VAR_STRING)
13387 	{
13388 	    act = get_tv_string_chk(&argvars[1]);
13389 	    if (act == NULL)
13390 		return;		/* type error; errmsg already given */
13391 	    if (*act == 'a' || *act == 'r')
13392 		action = *act;
13393 	}
13394 
13395 	if (l != NULL && set_errorlist(l, action) == OK)
13396 	    rettv->vval.v_number = 0;
13397     }
13398 #endif
13399 }
13400 
13401 /*
13402  * "setreg()" function
13403  */
13404     static void
13405 f_setreg(argvars, rettv)
13406     typval_T	*argvars;
13407     typval_T	*rettv;
13408 {
13409     int		regname;
13410     char_u	*strregname;
13411     char_u	*stropt;
13412     char_u	*strval;
13413     int		append;
13414     char_u	yank_type;
13415     long	block_len;
13416 
13417     block_len = -1;
13418     yank_type = MAUTO;
13419     append = FALSE;
13420 
13421     strregname = get_tv_string_chk(argvars);
13422     rettv->vval.v_number = 1;		/* FAIL is default */
13423 
13424     if (strregname == NULL)
13425 	return;		/* type error; errmsg already given */
13426     regname = *strregname;
13427     if (regname == 0 || regname == '@')
13428 	regname = '"';
13429     else if (regname == '=')
13430 	return;
13431 
13432     if (argvars[2].v_type != VAR_UNKNOWN)
13433     {
13434 	stropt = get_tv_string_chk(&argvars[2]);
13435 	if (stropt == NULL)
13436 	    return;		/* type error */
13437 	for (; *stropt != NUL; ++stropt)
13438 	    switch (*stropt)
13439 	    {
13440 		case 'a': case 'A':	/* append */
13441 		    append = TRUE;
13442 		    break;
13443 		case 'v': case 'c':	/* character-wise selection */
13444 		    yank_type = MCHAR;
13445 		    break;
13446 		case 'V': case 'l':	/* line-wise selection */
13447 		    yank_type = MLINE;
13448 		    break;
13449 #ifdef FEAT_VISUAL
13450 		case 'b': case Ctrl_V:	/* block-wise selection */
13451 		    yank_type = MBLOCK;
13452 		    if (VIM_ISDIGIT(stropt[1]))
13453 		    {
13454 			++stropt;
13455 			block_len = getdigits(&stropt) - 1;
13456 			--stropt;
13457 		    }
13458 		    break;
13459 #endif
13460 	    }
13461     }
13462 
13463     strval = get_tv_string_chk(&argvars[1]);
13464     if (strval != NULL)
13465 	write_reg_contents_ex(regname, strval, -1,
13466 						append, yank_type, block_len);
13467     rettv->vval.v_number = 0;
13468 }
13469 
13470 
13471 /*
13472  * "setwinvar(expr)" function
13473  */
13474 /*ARGSUSED*/
13475     static void
13476 f_setwinvar(argvars, rettv)
13477     typval_T	*argvars;
13478     typval_T	*rettv;
13479 {
13480     win_T	*win;
13481 #ifdef FEAT_WINDOWS
13482     win_T	*save_curwin;
13483 #endif
13484     char_u	*varname, *winvarname;
13485     typval_T	*varp;
13486     char_u	nbuf[NUMBUFLEN];
13487 
13488     rettv->vval.v_number = 0;
13489 
13490     if (check_restricted() || check_secure())
13491 	return;
13492     win = find_win_by_nr(&argvars[0]);
13493     varname = get_tv_string_chk(&argvars[1]);
13494     varp = &argvars[2];
13495 
13496     if (win != NULL && varname != NULL && varp != NULL)
13497     {
13498 #ifdef FEAT_WINDOWS
13499 	/* set curwin to be our win, temporarily */
13500 	save_curwin = curwin;
13501 	curwin = win;
13502 	curbuf = curwin->w_buffer;
13503 #endif
13504 
13505 	if (*varname == '&')
13506 	{
13507 	    long	numval;
13508 	    char_u	*strval;
13509 	    int		error = FALSE;
13510 
13511 	    ++varname;
13512 	    numval = get_tv_number_chk(varp, &error);
13513 	    strval = get_tv_string_buf_chk(varp, nbuf);
13514 	    if (!error && strval != NULL)
13515 		set_option_value(varname, numval, strval, OPT_LOCAL);
13516 	}
13517 	else
13518 	{
13519 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13520 	    if (winvarname != NULL)
13521 	    {
13522 		STRCPY(winvarname, "w:");
13523 		STRCPY(winvarname + 2, varname);
13524 		set_var(winvarname, varp, TRUE);
13525 		vim_free(winvarname);
13526 	    }
13527 	}
13528 
13529 #ifdef FEAT_WINDOWS
13530 	/* Restore current window, if it's still valid (autocomands can make
13531 	 * it invalid). */
13532 	if (win_valid(save_curwin))
13533 	{
13534 	    curwin = save_curwin;
13535 	    curbuf = curwin->w_buffer;
13536 	}
13537 #endif
13538     }
13539 }
13540 
13541 /*
13542  * "simplify()" function
13543  */
13544     static void
13545 f_simplify(argvars, rettv)
13546     typval_T	*argvars;
13547     typval_T	*rettv;
13548 {
13549     char_u	*p;
13550 
13551     p = get_tv_string(&argvars[0]);
13552     rettv->vval.v_string = vim_strsave(p);
13553     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13554     rettv->v_type = VAR_STRING;
13555 }
13556 
13557 static int
13558 #ifdef __BORLANDC__
13559     _RTLENTRYF
13560 #endif
13561 	item_compare __ARGS((const void *s1, const void *s2));
13562 static int
13563 #ifdef __BORLANDC__
13564     _RTLENTRYF
13565 #endif
13566 	item_compare2 __ARGS((const void *s1, const void *s2));
13567 
13568 static int	item_compare_ic;
13569 static char_u	*item_compare_func;
13570 static int	item_compare_func_err;
13571 #define ITEM_COMPARE_FAIL 999
13572 
13573 /*
13574  * Compare functions for f_sort() below.
13575  */
13576     static int
13577 #ifdef __BORLANDC__
13578 _RTLENTRYF
13579 #endif
13580 item_compare(s1, s2)
13581     const void	*s1;
13582     const void	*s2;
13583 {
13584     char_u	*p1, *p2;
13585     char_u	*tofree1, *tofree2;
13586     int		res;
13587     char_u	numbuf1[NUMBUFLEN];
13588     char_u	numbuf2[NUMBUFLEN];
13589 
13590     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13591     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13592     if (item_compare_ic)
13593 	res = STRICMP(p1, p2);
13594     else
13595 	res = STRCMP(p1, p2);
13596     vim_free(tofree1);
13597     vim_free(tofree2);
13598     return res;
13599 }
13600 
13601     static int
13602 #ifdef __BORLANDC__
13603 _RTLENTRYF
13604 #endif
13605 item_compare2(s1, s2)
13606     const void	*s1;
13607     const void	*s2;
13608 {
13609     int		res;
13610     typval_T	rettv;
13611     typval_T	argv[2];
13612     int		dummy;
13613 
13614     /* shortcut after failure in previous call; compare all items equal */
13615     if (item_compare_func_err)
13616 	return 0;
13617 
13618     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13619      * in the copy without changing the original list items. */
13620     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13621     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13622 
13623     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13624     res = call_func(item_compare_func, STRLEN(item_compare_func),
13625 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13626     clear_tv(&argv[0]);
13627     clear_tv(&argv[1]);
13628 
13629     if (res == FAIL)
13630 	res = ITEM_COMPARE_FAIL;
13631     else
13632 	/* return value has wrong type */
13633 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13634     if (item_compare_func_err)
13635 	res = ITEM_COMPARE_FAIL;
13636     clear_tv(&rettv);
13637     return res;
13638 }
13639 
13640 /*
13641  * "sort({list})" function
13642  */
13643     static void
13644 f_sort(argvars, rettv)
13645     typval_T	*argvars;
13646     typval_T	*rettv;
13647 {
13648     list_T	*l;
13649     listitem_T	*li;
13650     listitem_T	**ptrs;
13651     long	len;
13652     long	i;
13653 
13654     rettv->vval.v_number = 0;
13655     if (argvars[0].v_type != VAR_LIST)
13656 	EMSG2(_(e_listarg), "sort()");
13657     else
13658     {
13659 	l = argvars[0].vval.v_list;
13660 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13661 	    return;
13662 	rettv->vval.v_list = l;
13663 	rettv->v_type = VAR_LIST;
13664 	++l->lv_refcount;
13665 
13666 	len = list_len(l);
13667 	if (len <= 1)
13668 	    return;	/* short list sorts pretty quickly */
13669 
13670 	item_compare_ic = FALSE;
13671 	item_compare_func = NULL;
13672 	if (argvars[1].v_type != VAR_UNKNOWN)
13673 	{
13674 	    if (argvars[1].v_type == VAR_FUNC)
13675 		item_compare_func = argvars[1].vval.v_string;
13676 	    else
13677 	    {
13678 		int	    error = FALSE;
13679 
13680 		i = get_tv_number_chk(&argvars[1], &error);
13681 		if (error)
13682 		    return;		/* type error; errmsg already given */
13683 		if (i == 1)
13684 		    item_compare_ic = TRUE;
13685 		else
13686 		    item_compare_func = get_tv_string(&argvars[1]);
13687 	    }
13688 	}
13689 
13690 	/* Make an array with each entry pointing to an item in the List. */
13691 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13692 	if (ptrs == NULL)
13693 	    return;
13694 	i = 0;
13695 	for (li = l->lv_first; li != NULL; li = li->li_next)
13696 	    ptrs[i++] = li;
13697 
13698 	item_compare_func_err = FALSE;
13699 	/* test the compare function */
13700 	if (item_compare_func != NULL
13701 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13702 							 == ITEM_COMPARE_FAIL)
13703 	    EMSG(_("E702: Sort compare function failed"));
13704 	else
13705 	{
13706 	    /* Sort the array with item pointers. */
13707 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13708 		    item_compare_func == NULL ? item_compare : item_compare2);
13709 
13710 	    if (!item_compare_func_err)
13711 	    {
13712 		/* Clear the List and append the items in the sorted order. */
13713 		l->lv_first = l->lv_last = NULL;
13714 		l->lv_len = 0;
13715 		for (i = 0; i < len; ++i)
13716 		    list_append(l, ptrs[i]);
13717 	    }
13718 	}
13719 
13720 	vim_free(ptrs);
13721     }
13722 }
13723 
13724 /*
13725  * "soundfold({word})" function
13726  */
13727     static void
13728 f_soundfold(argvars, rettv)
13729     typval_T	*argvars;
13730     typval_T	*rettv;
13731 {
13732     char_u	*s;
13733 
13734     rettv->v_type = VAR_STRING;
13735     s = get_tv_string(&argvars[0]);
13736 #ifdef FEAT_SYN_HL
13737     rettv->vval.v_string = eval_soundfold(s);
13738 #else
13739     rettv->vval.v_string = vim_strsave(s);
13740 #endif
13741 }
13742 
13743 /*
13744  * "spellbadword()" function
13745  */
13746 /* ARGSUSED */
13747     static void
13748 f_spellbadword(argvars, rettv)
13749     typval_T	*argvars;
13750     typval_T	*rettv;
13751 {
13752     int		len;
13753 
13754     rettv->vval.v_string = NULL;
13755     rettv->v_type = VAR_STRING;
13756 
13757 #ifdef FEAT_SYN_HL
13758     /* Find the start and length of the badly spelled word. */
13759     len = spell_move_to(curwin, FORWARD, TRUE, TRUE, NULL);
13760     if (len != 0)
13761 	rettv->vval.v_string = vim_strnsave(ml_get_cursor(), len);
13762 #endif
13763 }
13764 
13765 /*
13766  * "spellsuggest()" function
13767  */
13768     static void
13769 f_spellsuggest(argvars, rettv)
13770     typval_T	*argvars;
13771     typval_T	*rettv;
13772 {
13773     char_u	*str;
13774     int		maxcount;
13775     garray_T	ga;
13776     list_T	*l;
13777     listitem_T	*li;
13778     int		i;
13779 
13780     l = list_alloc();
13781     if (l == NULL)
13782 	return;
13783     rettv->v_type = VAR_LIST;
13784     rettv->vval.v_list = l;
13785     ++l->lv_refcount;
13786 
13787 #ifdef FEAT_SYN_HL
13788     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13789     {
13790 	str = get_tv_string(&argvars[0]);
13791 	if (argvars[1].v_type != VAR_UNKNOWN)
13792 	{
13793 	    maxcount = get_tv_number(&argvars[1]);
13794 	    if (maxcount <= 0)
13795 		return;
13796 	}
13797 	else
13798 	    maxcount = 25;
13799 
13800 	spell_suggest_list(&ga, str, maxcount, FALSE);
13801 
13802 	for (i = 0; i < ga.ga_len; ++i)
13803 	{
13804 	    str = ((char_u **)ga.ga_data)[i];
13805 
13806 	    li = listitem_alloc();
13807 	    if (li == NULL)
13808 		vim_free(str);
13809 	    else
13810 	    {
13811 		li->li_tv.v_type = VAR_STRING;
13812 		li->li_tv.v_lock = 0;
13813 		li->li_tv.vval.v_string = str;
13814 		list_append(l, li);
13815 	    }
13816 	}
13817 	ga_clear(&ga);
13818     }
13819 #endif
13820 }
13821 
13822     static void
13823 f_split(argvars, rettv)
13824     typval_T	*argvars;
13825     typval_T	*rettv;
13826 {
13827     char_u	*str;
13828     char_u	*end;
13829     char_u	*pat = NULL;
13830     regmatch_T	regmatch;
13831     char_u	patbuf[NUMBUFLEN];
13832     char_u	*save_cpo;
13833     int		match;
13834     listitem_T	*ni;
13835     list_T	*l;
13836     colnr_T	col = 0;
13837     int		keepempty = FALSE;
13838     int		typeerr = FALSE;
13839 
13840     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13841     save_cpo = p_cpo;
13842     p_cpo = (char_u *)"";
13843 
13844     str = get_tv_string(&argvars[0]);
13845     if (argvars[1].v_type != VAR_UNKNOWN)
13846     {
13847 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13848 	if (pat == NULL)
13849 	    typeerr = TRUE;
13850 	if (argvars[2].v_type != VAR_UNKNOWN)
13851 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13852     }
13853     if (pat == NULL || *pat == NUL)
13854 	pat = (char_u *)"[\\x01- ]\\+";
13855 
13856     l = list_alloc();
13857     if (l == NULL)
13858 	return;
13859     rettv->v_type = VAR_LIST;
13860     rettv->vval.v_list = l;
13861     ++l->lv_refcount;
13862     if (typeerr)
13863 	return;
13864 
13865     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
13866     if (regmatch.regprog != NULL)
13867     {
13868 	regmatch.rm_ic = FALSE;
13869 	while (*str != NUL || keepempty)
13870 	{
13871 	    if (*str == NUL)
13872 		match = FALSE;	/* empty item at the end */
13873 	    else
13874 		match = vim_regexec_nl(&regmatch, str, col);
13875 	    if (match)
13876 		end = regmatch.startp[0];
13877 	    else
13878 		end = str + STRLEN(str);
13879 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
13880 					  && match && end < regmatch.endp[0]))
13881 	    {
13882 		ni = listitem_alloc();
13883 		if (ni == NULL)
13884 		    break;
13885 		ni->li_tv.v_type = VAR_STRING;
13886 		ni->li_tv.v_lock = 0;
13887 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
13888 		list_append(l, ni);
13889 	    }
13890 	    if (!match)
13891 		break;
13892 	    /* Advance to just after the match. */
13893 	    if (regmatch.endp[0] > str)
13894 		col = 0;
13895 	    else
13896 	    {
13897 		/* Don't get stuck at the same match. */
13898 #ifdef FEAT_MBYTE
13899 		col = (*mb_ptr2len)(regmatch.endp[0]);
13900 #else
13901 		col = 1;
13902 #endif
13903 	    }
13904 	    str = regmatch.endp[0];
13905 	}
13906 
13907 	vim_free(regmatch.regprog);
13908     }
13909 
13910     p_cpo = save_cpo;
13911 }
13912 
13913 #ifdef HAVE_STRFTIME
13914 /*
13915  * "strftime({format}[, {time}])" function
13916  */
13917     static void
13918 f_strftime(argvars, rettv)
13919     typval_T	*argvars;
13920     typval_T	*rettv;
13921 {
13922     char_u	result_buf[256];
13923     struct tm	*curtime;
13924     time_t	seconds;
13925     char_u	*p;
13926 
13927     rettv->v_type = VAR_STRING;
13928 
13929     p = get_tv_string(&argvars[0]);
13930     if (argvars[1].v_type == VAR_UNKNOWN)
13931 	seconds = time(NULL);
13932     else
13933 	seconds = (time_t)get_tv_number(&argvars[1]);
13934     curtime = localtime(&seconds);
13935     /* MSVC returns NULL for an invalid value of seconds. */
13936     if (curtime == NULL)
13937 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
13938     else
13939     {
13940 # ifdef FEAT_MBYTE
13941 	vimconv_T   conv;
13942 	char_u	    *enc;
13943 
13944 	conv.vc_type = CONV_NONE;
13945 	enc = enc_locale();
13946 	convert_setup(&conv, p_enc, enc);
13947 	if (conv.vc_type != CONV_NONE)
13948 	    p = string_convert(&conv, p, NULL);
13949 # endif
13950 	if (p != NULL)
13951 	    (void)strftime((char *)result_buf, sizeof(result_buf),
13952 							  (char *)p, curtime);
13953 	else
13954 	    result_buf[0] = NUL;
13955 
13956 # ifdef FEAT_MBYTE
13957 	if (conv.vc_type != CONV_NONE)
13958 	    vim_free(p);
13959 	convert_setup(&conv, enc, p_enc);
13960 	if (conv.vc_type != CONV_NONE)
13961 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
13962 	else
13963 # endif
13964 	    rettv->vval.v_string = vim_strsave(result_buf);
13965 
13966 # ifdef FEAT_MBYTE
13967 	/* Release conversion descriptors */
13968 	convert_setup(&conv, NULL, NULL);
13969 	vim_free(enc);
13970 # endif
13971     }
13972 }
13973 #endif
13974 
13975 /*
13976  * "stridx()" function
13977  */
13978     static void
13979 f_stridx(argvars, rettv)
13980     typval_T	*argvars;
13981     typval_T	*rettv;
13982 {
13983     char_u	buf[NUMBUFLEN];
13984     char_u	*needle;
13985     char_u	*haystack;
13986     char_u	*save_haystack;
13987     char_u	*pos;
13988     int		start_idx;
13989 
13990     needle = get_tv_string_chk(&argvars[1]);
13991     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
13992     rettv->vval.v_number = -1;
13993     if (needle == NULL || haystack == NULL)
13994 	return;		/* type error; errmsg already given */
13995 
13996     if (argvars[2].v_type != VAR_UNKNOWN)
13997     {
13998 	int	    error = FALSE;
13999 
14000 	start_idx = get_tv_number_chk(&argvars[2], &error);
14001 	if (error || start_idx >= (int)STRLEN(haystack))
14002 	    return;
14003 	if (start_idx >= 0)
14004 	    haystack += start_idx;
14005     }
14006 
14007     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14008     if (pos != NULL)
14009 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14010 }
14011 
14012 /*
14013  * "string()" function
14014  */
14015     static void
14016 f_string(argvars, rettv)
14017     typval_T	*argvars;
14018     typval_T	*rettv;
14019 {
14020     char_u	*tofree;
14021     char_u	numbuf[NUMBUFLEN];
14022 
14023     rettv->v_type = VAR_STRING;
14024     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
14025     if (tofree == NULL)
14026 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14027 }
14028 
14029 /*
14030  * "strlen()" function
14031  */
14032     static void
14033 f_strlen(argvars, rettv)
14034     typval_T	*argvars;
14035     typval_T	*rettv;
14036 {
14037     rettv->vval.v_number = (varnumber_T)(STRLEN(
14038 					      get_tv_string(&argvars[0])));
14039 }
14040 
14041 /*
14042  * "strpart()" function
14043  */
14044     static void
14045 f_strpart(argvars, rettv)
14046     typval_T	*argvars;
14047     typval_T	*rettv;
14048 {
14049     char_u	*p;
14050     int		n;
14051     int		len;
14052     int		slen;
14053     int		error = FALSE;
14054 
14055     p = get_tv_string(&argvars[0]);
14056     slen = (int)STRLEN(p);
14057 
14058     n = get_tv_number_chk(&argvars[1], &error);
14059     if (error)
14060 	len = 0;
14061     else if (argvars[2].v_type != VAR_UNKNOWN)
14062 	len = get_tv_number(&argvars[2]);
14063     else
14064 	len = slen - n;	    /* default len: all bytes that are available. */
14065 
14066     /*
14067      * Only return the overlap between the specified part and the actual
14068      * string.
14069      */
14070     if (n < 0)
14071     {
14072 	len += n;
14073 	n = 0;
14074     }
14075     else if (n > slen)
14076 	n = slen;
14077     if (len < 0)
14078 	len = 0;
14079     else if (n + len > slen)
14080 	len = slen - n;
14081 
14082     rettv->v_type = VAR_STRING;
14083     rettv->vval.v_string = vim_strnsave(p + n, len);
14084 }
14085 
14086 /*
14087  * "strridx()" function
14088  */
14089     static void
14090 f_strridx(argvars, rettv)
14091     typval_T	*argvars;
14092     typval_T	*rettv;
14093 {
14094     char_u	buf[NUMBUFLEN];
14095     char_u	*needle;
14096     char_u	*haystack;
14097     char_u	*rest;
14098     char_u	*lastmatch = NULL;
14099     int		haystack_len, end_idx;
14100 
14101     needle = get_tv_string_chk(&argvars[1]);
14102     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14103     haystack_len = STRLEN(haystack);
14104 
14105     rettv->vval.v_number = -1;
14106     if (needle == NULL || haystack == NULL)
14107 	return;		/* type error; errmsg already given */
14108     if (argvars[2].v_type != VAR_UNKNOWN)
14109     {
14110 	/* Third argument: upper limit for index */
14111 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14112 	if (end_idx < 0)
14113 	    return;	/* can never find a match */
14114     }
14115     else
14116 	end_idx = haystack_len;
14117 
14118     if (*needle == NUL)
14119     {
14120 	/* Empty string matches past the end. */
14121 	lastmatch = haystack + end_idx;
14122     }
14123     else
14124     {
14125 	for (rest = haystack; *rest != '\0'; ++rest)
14126 	{
14127 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14128 	    if (rest == NULL || rest > haystack + end_idx)
14129 		break;
14130 	    lastmatch = rest;
14131 	}
14132     }
14133 
14134     if (lastmatch == NULL)
14135 	rettv->vval.v_number = -1;
14136     else
14137 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14138 }
14139 
14140 /*
14141  * "strtrans()" function
14142  */
14143     static void
14144 f_strtrans(argvars, rettv)
14145     typval_T	*argvars;
14146     typval_T	*rettv;
14147 {
14148     rettv->v_type = VAR_STRING;
14149     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14150 }
14151 
14152 /*
14153  * "submatch()" function
14154  */
14155     static void
14156 f_submatch(argvars, rettv)
14157     typval_T	*argvars;
14158     typval_T	*rettv;
14159 {
14160     rettv->v_type = VAR_STRING;
14161     rettv->vval.v_string =
14162 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14163 }
14164 
14165 /*
14166  * "substitute()" function
14167  */
14168     static void
14169 f_substitute(argvars, rettv)
14170     typval_T	*argvars;
14171     typval_T	*rettv;
14172 {
14173     char_u	patbuf[NUMBUFLEN];
14174     char_u	subbuf[NUMBUFLEN];
14175     char_u	flagsbuf[NUMBUFLEN];
14176 
14177     char_u	*str = get_tv_string_chk(&argvars[0]);
14178     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14179     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14180     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14181 
14182     rettv->v_type = VAR_STRING;
14183     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14184 	rettv->vval.v_string = NULL;
14185     else
14186 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14187 }
14188 
14189 /*
14190  * "synID(lnum, col, trans)" function
14191  */
14192 /*ARGSUSED*/
14193     static void
14194 f_synID(argvars, rettv)
14195     typval_T	*argvars;
14196     typval_T	*rettv;
14197 {
14198     int		id = 0;
14199 #ifdef FEAT_SYN_HL
14200     long	lnum;
14201     long	col;
14202     int		trans;
14203     int		transerr = FALSE;
14204 
14205     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14206     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14207     trans = get_tv_number_chk(&argvars[2], &transerr);
14208 
14209     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14210 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14211 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
14212 #endif
14213 
14214     rettv->vval.v_number = id;
14215 }
14216 
14217 /*
14218  * "synIDattr(id, what [, mode])" function
14219  */
14220 /*ARGSUSED*/
14221     static void
14222 f_synIDattr(argvars, rettv)
14223     typval_T	*argvars;
14224     typval_T	*rettv;
14225 {
14226     char_u	*p = NULL;
14227 #ifdef FEAT_SYN_HL
14228     int		id;
14229     char_u	*what;
14230     char_u	*mode;
14231     char_u	modebuf[NUMBUFLEN];
14232     int		modec;
14233 
14234     id = get_tv_number(&argvars[0]);
14235     what = get_tv_string(&argvars[1]);
14236     if (argvars[2].v_type != VAR_UNKNOWN)
14237     {
14238 	mode = get_tv_string_buf(&argvars[2], modebuf);
14239 	modec = TOLOWER_ASC(mode[0]);
14240 	if (modec != 't' && modec != 'c'
14241 #ifdef FEAT_GUI
14242 		&& modec != 'g'
14243 #endif
14244 		)
14245 	    modec = 0;	/* replace invalid with current */
14246     }
14247     else
14248     {
14249 #ifdef FEAT_GUI
14250 	if (gui.in_use)
14251 	    modec = 'g';
14252 	else
14253 #endif
14254 	    if (t_colors > 1)
14255 	    modec = 'c';
14256 	else
14257 	    modec = 't';
14258     }
14259 
14260 
14261     switch (TOLOWER_ASC(what[0]))
14262     {
14263 	case 'b':
14264 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14265 		    p = highlight_color(id, what, modec);
14266 		else					/* bold */
14267 		    p = highlight_has_attr(id, HL_BOLD, modec);
14268 		break;
14269 
14270 	case 'f':					/* fg[#] */
14271 		p = highlight_color(id, what, modec);
14272 		break;
14273 
14274 	case 'i':
14275 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14276 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14277 		else					/* italic */
14278 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14279 		break;
14280 
14281 	case 'n':					/* name */
14282 		p = get_highlight_name(NULL, id - 1);
14283 		break;
14284 
14285 	case 'r':					/* reverse */
14286 		p = highlight_has_attr(id, HL_INVERSE, modec);
14287 		break;
14288 
14289 	case 's':					/* standout */
14290 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14291 		break;
14292 
14293 	case 'u':
14294 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14295 							/* underline */
14296 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14297 		else
14298 							/* undercurl */
14299 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14300 		break;
14301     }
14302 
14303     if (p != NULL)
14304 	p = vim_strsave(p);
14305 #endif
14306     rettv->v_type = VAR_STRING;
14307     rettv->vval.v_string = p;
14308 }
14309 
14310 /*
14311  * "synIDtrans(id)" function
14312  */
14313 /*ARGSUSED*/
14314     static void
14315 f_synIDtrans(argvars, rettv)
14316     typval_T	*argvars;
14317     typval_T	*rettv;
14318 {
14319     int		id;
14320 
14321 #ifdef FEAT_SYN_HL
14322     id = get_tv_number(&argvars[0]);
14323 
14324     if (id > 0)
14325 	id = syn_get_final_id(id);
14326     else
14327 #endif
14328 	id = 0;
14329 
14330     rettv->vval.v_number = id;
14331 }
14332 
14333 /*
14334  * "system()" function
14335  */
14336     static void
14337 f_system(argvars, rettv)
14338     typval_T	*argvars;
14339     typval_T	*rettv;
14340 {
14341     char_u	*res = NULL;
14342     char_u	*p;
14343     char_u	*infile = NULL;
14344     char_u	buf[NUMBUFLEN];
14345     int		err = FALSE;
14346     FILE	*fd;
14347 
14348     if (argvars[1].v_type != VAR_UNKNOWN)
14349     {
14350 	/*
14351 	 * Write the string to a temp file, to be used for input of the shell
14352 	 * command.
14353 	 */
14354 	if ((infile = vim_tempname('i')) == NULL)
14355 	{
14356 	    EMSG(_(e_notmp));
14357 	    return;
14358 	}
14359 
14360 	fd = mch_fopen((char *)infile, WRITEBIN);
14361 	if (fd == NULL)
14362 	{
14363 	    EMSG2(_(e_notopen), infile);
14364 	    goto done;
14365 	}
14366 	p = get_tv_string_buf_chk(&argvars[1], buf);
14367 	if (p == NULL)
14368 	    goto done;		/* type error; errmsg already given */
14369 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14370 	    err = TRUE;
14371 	if (fclose(fd) != 0)
14372 	    err = TRUE;
14373 	if (err)
14374 	{
14375 	    EMSG(_("E677: Error writing temp file"));
14376 	    goto done;
14377 	}
14378     }
14379 
14380     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14381 
14382 #ifdef USE_CR
14383     /* translate <CR> into <NL> */
14384     if (res != NULL)
14385     {
14386 	char_u	*s;
14387 
14388 	for (s = res; *s; ++s)
14389 	{
14390 	    if (*s == CAR)
14391 		*s = NL;
14392 	}
14393     }
14394 #else
14395 # ifdef USE_CRNL
14396     /* translate <CR><NL> into <NL> */
14397     if (res != NULL)
14398     {
14399 	char_u	*s, *d;
14400 
14401 	d = res;
14402 	for (s = res; *s; ++s)
14403 	{
14404 	    if (s[0] == CAR && s[1] == NL)
14405 		++s;
14406 	    *d++ = *s;
14407 	}
14408 	*d = NUL;
14409     }
14410 # endif
14411 #endif
14412 
14413 done:
14414     if (infile != NULL)
14415     {
14416 	mch_remove(infile);
14417 	vim_free(infile);
14418     }
14419     rettv->v_type = VAR_STRING;
14420     rettv->vval.v_string = res;
14421 }
14422 
14423 /*
14424  * "taglist()" function
14425  */
14426     static void
14427 f_taglist(argvars, rettv)
14428     typval_T  *argvars;
14429     typval_T  *rettv;
14430 {
14431     char_u  *tag_pattern;
14432     list_T  *l;
14433 
14434     tag_pattern = get_tv_string(&argvars[0]);
14435 
14436     rettv->vval.v_number = FALSE;
14437     if (*tag_pattern == NUL)
14438 	return;
14439 
14440     l = list_alloc();
14441     if (l != NULL)
14442     {
14443 	if (get_tags(l, tag_pattern) != FAIL)
14444 	{
14445 	    rettv->vval.v_list = l;
14446 	    rettv->v_type = VAR_LIST;
14447 	    ++l->lv_refcount;
14448 	}
14449 	else
14450 	    list_free(l);
14451     }
14452 }
14453 
14454 /*
14455  * "tempname()" function
14456  */
14457 /*ARGSUSED*/
14458     static void
14459 f_tempname(argvars, rettv)
14460     typval_T	*argvars;
14461     typval_T	*rettv;
14462 {
14463     static int	x = 'A';
14464 
14465     rettv->v_type = VAR_STRING;
14466     rettv->vval.v_string = vim_tempname(x);
14467 
14468     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14469      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14470     do
14471     {
14472 	if (x == 'Z')
14473 	    x = '0';
14474 	else if (x == '9')
14475 	    x = 'A';
14476 	else
14477 	{
14478 #ifdef EBCDIC
14479 	    if (x == 'I')
14480 		x = 'J';
14481 	    else if (x == 'R')
14482 		x = 'S';
14483 	    else
14484 #endif
14485 		++x;
14486 	}
14487     } while (x == 'I' || x == 'O');
14488 }
14489 
14490 /*
14491  * "test(list)" function: Just checking the walls...
14492  */
14493 /*ARGSUSED*/
14494     static void
14495 f_test(argvars, rettv)
14496     typval_T	*argvars;
14497     typval_T	*rettv;
14498 {
14499     /* Used for unit testing.  Change the code below to your liking. */
14500 #if 0
14501     listitem_T	*li;
14502     list_T	*l;
14503     char_u	*bad, *good;
14504 
14505     if (argvars[0].v_type != VAR_LIST)
14506 	return;
14507     l = argvars[0].vval.v_list;
14508     if (l == NULL)
14509 	return;
14510     li = l->lv_first;
14511     if (li == NULL)
14512 	return;
14513     bad = get_tv_string(&li->li_tv);
14514     li = li->li_next;
14515     if (li == NULL)
14516 	return;
14517     good = get_tv_string(&li->li_tv);
14518     rettv->vval.v_number = test_edit_score(bad, good);
14519 #endif
14520 }
14521 
14522 /*
14523  * "tolower(string)" function
14524  */
14525     static void
14526 f_tolower(argvars, rettv)
14527     typval_T	*argvars;
14528     typval_T	*rettv;
14529 {
14530     char_u	*p;
14531 
14532     p = vim_strsave(get_tv_string(&argvars[0]));
14533     rettv->v_type = VAR_STRING;
14534     rettv->vval.v_string = p;
14535 
14536     if (p != NULL)
14537 	while (*p != NUL)
14538 	{
14539 #ifdef FEAT_MBYTE
14540 	    int		l;
14541 
14542 	    if (enc_utf8)
14543 	    {
14544 		int c, lc;
14545 
14546 		c = utf_ptr2char(p);
14547 		lc = utf_tolower(c);
14548 		l = utf_ptr2len(p);
14549 		/* TODO: reallocate string when byte count changes. */
14550 		if (utf_char2len(lc) == l)
14551 		    utf_char2bytes(lc, p);
14552 		p += l;
14553 	    }
14554 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
14555 		p += l;		/* skip multi-byte character */
14556 	    else
14557 #endif
14558 	    {
14559 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14560 		++p;
14561 	    }
14562 	}
14563 }
14564 
14565 /*
14566  * "toupper(string)" function
14567  */
14568     static void
14569 f_toupper(argvars, rettv)
14570     typval_T	*argvars;
14571     typval_T	*rettv;
14572 {
14573     rettv->v_type = VAR_STRING;
14574     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14575 }
14576 
14577 /*
14578  * "tr(string, fromstr, tostr)" function
14579  */
14580     static void
14581 f_tr(argvars, rettv)
14582     typval_T	*argvars;
14583     typval_T	*rettv;
14584 {
14585     char_u	*instr;
14586     char_u	*fromstr;
14587     char_u	*tostr;
14588     char_u	*p;
14589 #ifdef FEAT_MBYTE
14590     int		inlen;
14591     int		fromlen;
14592     int		tolen;
14593     int		idx;
14594     char_u	*cpstr;
14595     int		cplen;
14596     int		first = TRUE;
14597 #endif
14598     char_u	buf[NUMBUFLEN];
14599     char_u	buf2[NUMBUFLEN];
14600     garray_T	ga;
14601 
14602     instr = get_tv_string(&argvars[0]);
14603     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14604     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14605 
14606     /* Default return value: empty string. */
14607     rettv->v_type = VAR_STRING;
14608     rettv->vval.v_string = NULL;
14609     if (fromstr == NULL || tostr == NULL)
14610 	    return;		/* type error; errmsg already given */
14611     ga_init2(&ga, (int)sizeof(char), 80);
14612 
14613 #ifdef FEAT_MBYTE
14614     if (!has_mbyte)
14615 #endif
14616 	/* not multi-byte: fromstr and tostr must be the same length */
14617 	if (STRLEN(fromstr) != STRLEN(tostr))
14618 	{
14619 #ifdef FEAT_MBYTE
14620 error:
14621 #endif
14622 	    EMSG2(_(e_invarg2), fromstr);
14623 	    ga_clear(&ga);
14624 	    return;
14625 	}
14626 
14627     /* fromstr and tostr have to contain the same number of chars */
14628     while (*instr != NUL)
14629     {
14630 #ifdef FEAT_MBYTE
14631 	if (has_mbyte)
14632 	{
14633 	    inlen = (*mb_ptr2len)(instr);
14634 	    cpstr = instr;
14635 	    cplen = inlen;
14636 	    idx = 0;
14637 	    for (p = fromstr; *p != NUL; p += fromlen)
14638 	    {
14639 		fromlen = (*mb_ptr2len)(p);
14640 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14641 		{
14642 		    for (p = tostr; *p != NUL; p += tolen)
14643 		    {
14644 			tolen = (*mb_ptr2len)(p);
14645 			if (idx-- == 0)
14646 			{
14647 			    cplen = tolen;
14648 			    cpstr = p;
14649 			    break;
14650 			}
14651 		    }
14652 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14653 			goto error;
14654 		    break;
14655 		}
14656 		++idx;
14657 	    }
14658 
14659 	    if (first && cpstr == instr)
14660 	    {
14661 		/* Check that fromstr and tostr have the same number of
14662 		 * (multi-byte) characters.  Done only once when a character
14663 		 * of instr doesn't appear in fromstr. */
14664 		first = FALSE;
14665 		for (p = tostr; *p != NUL; p += tolen)
14666 		{
14667 		    tolen = (*mb_ptr2len)(p);
14668 		    --idx;
14669 		}
14670 		if (idx != 0)
14671 		    goto error;
14672 	    }
14673 
14674 	    ga_grow(&ga, cplen);
14675 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14676 	    ga.ga_len += cplen;
14677 
14678 	    instr += inlen;
14679 	}
14680 	else
14681 #endif
14682 	{
14683 	    /* When not using multi-byte chars we can do it faster. */
14684 	    p = vim_strchr(fromstr, *instr);
14685 	    if (p != NULL)
14686 		ga_append(&ga, tostr[p - fromstr]);
14687 	    else
14688 		ga_append(&ga, *instr);
14689 	    ++instr;
14690 	}
14691     }
14692 
14693     rettv->vval.v_string = ga.ga_data;
14694 }
14695 
14696 /*
14697  * "type(expr)" function
14698  */
14699     static void
14700 f_type(argvars, rettv)
14701     typval_T	*argvars;
14702     typval_T	*rettv;
14703 {
14704     int n;
14705 
14706     switch (argvars[0].v_type)
14707     {
14708 	case VAR_NUMBER: n = 0; break;
14709 	case VAR_STRING: n = 1; break;
14710 	case VAR_FUNC:   n = 2; break;
14711 	case VAR_LIST:   n = 3; break;
14712 	case VAR_DICT:   n = 4; break;
14713 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14714     }
14715     rettv->vval.v_number = n;
14716 }
14717 
14718 /*
14719  * "values(dict)" function
14720  */
14721     static void
14722 f_values(argvars, rettv)
14723     typval_T	*argvars;
14724     typval_T	*rettv;
14725 {
14726     dict_list(argvars, rettv, 1);
14727 }
14728 
14729 /*
14730  * "virtcol(string)" function
14731  */
14732     static void
14733 f_virtcol(argvars, rettv)
14734     typval_T	*argvars;
14735     typval_T	*rettv;
14736 {
14737     colnr_T	vcol = 0;
14738     pos_T	*fp;
14739 
14740     fp = var2fpos(&argvars[0], FALSE);
14741     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14742     {
14743 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14744 	++vcol;
14745     }
14746 
14747     rettv->vval.v_number = vcol;
14748 }
14749 
14750 /*
14751  * "visualmode()" function
14752  */
14753 /*ARGSUSED*/
14754     static void
14755 f_visualmode(argvars, rettv)
14756     typval_T	*argvars;
14757     typval_T	*rettv;
14758 {
14759 #ifdef FEAT_VISUAL
14760     char_u	str[2];
14761 
14762     rettv->v_type = VAR_STRING;
14763     str[0] = curbuf->b_visual_mode_eval;
14764     str[1] = NUL;
14765     rettv->vval.v_string = vim_strsave(str);
14766 
14767     /* A non-zero number or non-empty string argument: reset mode. */
14768     if ((argvars[0].v_type == VAR_NUMBER
14769 		&& argvars[0].vval.v_number != 0)
14770 	    || (argvars[0].v_type == VAR_STRING
14771 		&& *get_tv_string(&argvars[0]) != NUL))
14772 	curbuf->b_visual_mode_eval = NUL;
14773 #else
14774     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14775 #endif
14776 }
14777 
14778 /*
14779  * "winbufnr(nr)" function
14780  */
14781     static void
14782 f_winbufnr(argvars, rettv)
14783     typval_T	*argvars;
14784     typval_T	*rettv;
14785 {
14786     win_T	*wp;
14787 
14788     wp = find_win_by_nr(&argvars[0]);
14789     if (wp == NULL)
14790 	rettv->vval.v_number = -1;
14791     else
14792 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14793 }
14794 
14795 /*
14796  * "wincol()" function
14797  */
14798 /*ARGSUSED*/
14799     static void
14800 f_wincol(argvars, rettv)
14801     typval_T	*argvars;
14802     typval_T	*rettv;
14803 {
14804     validate_cursor();
14805     rettv->vval.v_number = curwin->w_wcol + 1;
14806 }
14807 
14808 /*
14809  * "winheight(nr)" function
14810  */
14811     static void
14812 f_winheight(argvars, rettv)
14813     typval_T	*argvars;
14814     typval_T	*rettv;
14815 {
14816     win_T	*wp;
14817 
14818     wp = find_win_by_nr(&argvars[0]);
14819     if (wp == NULL)
14820 	rettv->vval.v_number = -1;
14821     else
14822 	rettv->vval.v_number = wp->w_height;
14823 }
14824 
14825 /*
14826  * "winline()" function
14827  */
14828 /*ARGSUSED*/
14829     static void
14830 f_winline(argvars, rettv)
14831     typval_T	*argvars;
14832     typval_T	*rettv;
14833 {
14834     validate_cursor();
14835     rettv->vval.v_number = curwin->w_wrow + 1;
14836 }
14837 
14838 /*
14839  * "winnr()" function
14840  */
14841 /* ARGSUSED */
14842     static void
14843 f_winnr(argvars, rettv)
14844     typval_T	*argvars;
14845     typval_T	*rettv;
14846 {
14847     int		nr = 1;
14848 #ifdef FEAT_WINDOWS
14849     win_T	*wp;
14850     win_T	*twin = curwin;
14851     char_u	*arg;
14852 
14853     if (argvars[0].v_type != VAR_UNKNOWN)
14854     {
14855 	arg = get_tv_string_chk(&argvars[0]);
14856 	if (arg == NULL)
14857 	    nr = 0;		/* type error; errmsg already given */
14858 	else if (STRCMP(arg, "$") == 0)
14859 	    twin = lastwin;
14860 	else if (STRCMP(arg, "#") == 0)
14861 	{
14862 	    twin = prevwin;
14863 	    if (prevwin == NULL)
14864 		nr = 0;
14865 	}
14866 	else
14867 	{
14868 	    EMSG2(_(e_invexpr2), arg);
14869 	    nr = 0;
14870 	}
14871     }
14872 
14873     if (nr > 0)
14874 	for (wp = firstwin; wp != twin; wp = wp->w_next)
14875 	    ++nr;
14876 #endif
14877     rettv->vval.v_number = nr;
14878 }
14879 
14880 /*
14881  * "winrestcmd()" function
14882  */
14883 /* ARGSUSED */
14884     static void
14885 f_winrestcmd(argvars, rettv)
14886     typval_T	*argvars;
14887     typval_T	*rettv;
14888 {
14889 #ifdef FEAT_WINDOWS
14890     win_T	*wp;
14891     int		winnr = 1;
14892     garray_T	ga;
14893     char_u	buf[50];
14894 
14895     ga_init2(&ga, (int)sizeof(char), 70);
14896     for (wp = firstwin; wp != NULL; wp = wp->w_next)
14897     {
14898 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
14899 	ga_concat(&ga, buf);
14900 # ifdef FEAT_VERTSPLIT
14901 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
14902 	ga_concat(&ga, buf);
14903 # endif
14904 	++winnr;
14905     }
14906     ga_append(&ga, NUL);
14907 
14908     rettv->vval.v_string = ga.ga_data;
14909 #else
14910     rettv->vval.v_string = NULL;
14911 #endif
14912     rettv->v_type = VAR_STRING;
14913 }
14914 
14915 /*
14916  * "winwidth(nr)" function
14917  */
14918     static void
14919 f_winwidth(argvars, rettv)
14920     typval_T	*argvars;
14921     typval_T	*rettv;
14922 {
14923     win_T	*wp;
14924 
14925     wp = find_win_by_nr(&argvars[0]);
14926     if (wp == NULL)
14927 	rettv->vval.v_number = -1;
14928     else
14929 #ifdef FEAT_VERTSPLIT
14930 	rettv->vval.v_number = wp->w_width;
14931 #else
14932 	rettv->vval.v_number = Columns;
14933 #endif
14934 }
14935 
14936 /*
14937  * "writefile()" function
14938  */
14939     static void
14940 f_writefile(argvars, rettv)
14941     typval_T	*argvars;
14942     typval_T	*rettv;
14943 {
14944     int		binary = FALSE;
14945     char_u	*fname;
14946     FILE	*fd;
14947     listitem_T	*li;
14948     char_u	*s;
14949     int		ret = 0;
14950     int		c;
14951 
14952     if (argvars[0].v_type != VAR_LIST)
14953     {
14954 	EMSG2(_(e_listarg), "writefile()");
14955 	return;
14956     }
14957     if (argvars[0].vval.v_list == NULL)
14958 	return;
14959 
14960     if (argvars[2].v_type != VAR_UNKNOWN
14961 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
14962 	binary = TRUE;
14963 
14964     /* Always open the file in binary mode, library functions have a mind of
14965      * their own about CR-LF conversion. */
14966     fname = get_tv_string(&argvars[1]);
14967     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
14968     {
14969 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
14970 	ret = -1;
14971     }
14972     else
14973     {
14974 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
14975 							     li = li->li_next)
14976 	{
14977 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
14978 	    {
14979 		if (*s == '\n')
14980 		    c = putc(NUL, fd);
14981 		else
14982 		    c = putc(*s, fd);
14983 		if (c == EOF)
14984 		{
14985 		    ret = -1;
14986 		    break;
14987 		}
14988 	    }
14989 	    if (!binary || li->li_next != NULL)
14990 		if (putc('\n', fd) == EOF)
14991 		{
14992 		    ret = -1;
14993 		    break;
14994 		}
14995 	    if (ret < 0)
14996 	    {
14997 		EMSG(_(e_write));
14998 		break;
14999 	    }
15000 	}
15001 	fclose(fd);
15002     }
15003 
15004     rettv->vval.v_number = ret;
15005 }
15006 
15007 /*
15008  * Translate a String variable into a position.
15009  */
15010     static pos_T *
15011 var2fpos(varp, lnum)
15012     typval_T	*varp;
15013     int		lnum;		/* TRUE when $ is last line */
15014 {
15015     char_u	*name;
15016     static pos_T	pos;
15017     pos_T	*pp;
15018 
15019     name = get_tv_string_chk(varp);
15020     if (name == NULL)
15021 	return NULL;
15022     if (name[0] == '.')		/* cursor */
15023 	return &curwin->w_cursor;
15024     if (name[0] == '\'')	/* mark */
15025     {
15026 	pp = getmark(name[1], FALSE);
15027 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
15028 	    return NULL;
15029 	return pp;
15030     }
15031     if (name[0] == '$')		/* last column or line */
15032     {
15033 	if (lnum)
15034 	{
15035 	    pos.lnum = curbuf->b_ml.ml_line_count;
15036 	    pos.col = 0;
15037 	}
15038 	else
15039 	{
15040 	    pos.lnum = curwin->w_cursor.lnum;
15041 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
15042 	}
15043 	return &pos;
15044     }
15045     return NULL;
15046 }
15047 
15048 /*
15049  * Get the length of an environment variable name.
15050  * Advance "arg" to the first character after the name.
15051  * Return 0 for error.
15052  */
15053     static int
15054 get_env_len(arg)
15055     char_u	**arg;
15056 {
15057     char_u	*p;
15058     int		len;
15059 
15060     for (p = *arg; vim_isIDc(*p); ++p)
15061 	;
15062     if (p == *arg)	    /* no name found */
15063 	return 0;
15064 
15065     len = (int)(p - *arg);
15066     *arg = p;
15067     return len;
15068 }
15069 
15070 /*
15071  * Get the length of the name of a function or internal variable.
15072  * "arg" is advanced to the first non-white character after the name.
15073  * Return 0 if something is wrong.
15074  */
15075     static int
15076 get_id_len(arg)
15077     char_u	**arg;
15078 {
15079     char_u	*p;
15080     int		len;
15081 
15082     /* Find the end of the name. */
15083     for (p = *arg; eval_isnamec(*p); ++p)
15084 	;
15085     if (p == *arg)	    /* no name found */
15086 	return 0;
15087 
15088     len = (int)(p - *arg);
15089     *arg = skipwhite(p);
15090 
15091     return len;
15092 }
15093 
15094 /*
15095  * Get the length of the name of a variable or function.
15096  * Only the name is recognized, does not handle ".key" or "[idx]".
15097  * "arg" is advanced to the first non-white character after the name.
15098  * Return -1 if curly braces expansion failed.
15099  * Return 0 if something else is wrong.
15100  * If the name contains 'magic' {}'s, expand them and return the
15101  * expanded name in an allocated string via 'alias' - caller must free.
15102  */
15103     static int
15104 get_name_len(arg, alias, evaluate, verbose)
15105     char_u	**arg;
15106     char_u	**alias;
15107     int		evaluate;
15108     int		verbose;
15109 {
15110     int		len;
15111     char_u	*p;
15112     char_u	*expr_start;
15113     char_u	*expr_end;
15114 
15115     *alias = NULL;  /* default to no alias */
15116 
15117     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
15118 						  && (*arg)[2] == (int)KE_SNR)
15119     {
15120 	/* hard coded <SNR>, already translated */
15121 	*arg += 3;
15122 	return get_id_len(arg) + 3;
15123     }
15124     len = eval_fname_script(*arg);
15125     if (len > 0)
15126     {
15127 	/* literal "<SID>", "s:" or "<SNR>" */
15128 	*arg += len;
15129     }
15130 
15131     /*
15132      * Find the end of the name; check for {} construction.
15133      */
15134     p = find_name_end(*arg, &expr_start, &expr_end,
15135 					       len > 0 ? 0 : FNE_CHECK_START);
15136     if (expr_start != NULL)
15137     {
15138 	char_u	*temp_string;
15139 
15140 	if (!evaluate)
15141 	{
15142 	    len += (int)(p - *arg);
15143 	    *arg = skipwhite(p);
15144 	    return len;
15145 	}
15146 
15147 	/*
15148 	 * Include any <SID> etc in the expanded string:
15149 	 * Thus the -len here.
15150 	 */
15151 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15152 	if (temp_string == NULL)
15153 	    return -1;
15154 	*alias = temp_string;
15155 	*arg = skipwhite(p);
15156 	return (int)STRLEN(temp_string);
15157     }
15158 
15159     len += get_id_len(arg);
15160     if (len == 0 && verbose)
15161 	EMSG2(_(e_invexpr2), *arg);
15162 
15163     return len;
15164 }
15165 
15166 /*
15167  * Find the end of a variable or function name, taking care of magic braces.
15168  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15169  * start and end of the first magic braces item.
15170  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15171  * Return a pointer to just after the name.  Equal to "arg" if there is no
15172  * valid name.
15173  */
15174     static char_u *
15175 find_name_end(arg, expr_start, expr_end, flags)
15176     char_u	*arg;
15177     char_u	**expr_start;
15178     char_u	**expr_end;
15179     int		flags;
15180 {
15181     int		mb_nest = 0;
15182     int		br_nest = 0;
15183     char_u	*p;
15184 
15185     if (expr_start != NULL)
15186     {
15187 	*expr_start = NULL;
15188 	*expr_end = NULL;
15189     }
15190 
15191     /* Quick check for valid starting character. */
15192     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15193 	return arg;
15194 
15195     for (p = arg; *p != NUL
15196 		    && (eval_isnamec(*p)
15197 			|| *p == '{'
15198 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15199 			|| mb_nest != 0
15200 			|| br_nest != 0); mb_ptr_adv(p))
15201     {
15202 	if (*p == '\'')
15203 	{
15204 	    /* skip over 'string' to avoid counting [ and ] inside it. */
15205 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
15206 		;
15207 	    if (*p == NUL)
15208 		break;
15209 	}
15210 	else if (*p == '"')
15211 	{
15212 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
15213 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
15214 		if (*p == '\\' && p[1] != NUL)
15215 		    ++p;
15216 	    if (*p == NUL)
15217 		break;
15218 	}
15219 
15220 	if (mb_nest == 0)
15221 	{
15222 	    if (*p == '[')
15223 		++br_nest;
15224 	    else if (*p == ']')
15225 		--br_nest;
15226 	}
15227 
15228 	if (br_nest == 0)
15229 	{
15230 	    if (*p == '{')
15231 	    {
15232 		mb_nest++;
15233 		if (expr_start != NULL && *expr_start == NULL)
15234 		    *expr_start = p;
15235 	    }
15236 	    else if (*p == '}')
15237 	    {
15238 		mb_nest--;
15239 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15240 		    *expr_end = p;
15241 	    }
15242 	}
15243     }
15244 
15245     return p;
15246 }
15247 
15248 /*
15249  * Expands out the 'magic' {}'s in a variable/function name.
15250  * Note that this can call itself recursively, to deal with
15251  * constructs like foo{bar}{baz}{bam}
15252  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15253  *			"in_start"      ^
15254  *			"expr_start"	   ^
15255  *			"expr_end"		 ^
15256  *			"in_end"			    ^
15257  *
15258  * Returns a new allocated string, which the caller must free.
15259  * Returns NULL for failure.
15260  */
15261     static char_u *
15262 make_expanded_name(in_start, expr_start, expr_end, in_end)
15263     char_u	*in_start;
15264     char_u	*expr_start;
15265     char_u	*expr_end;
15266     char_u	*in_end;
15267 {
15268     char_u	c1;
15269     char_u	*retval = NULL;
15270     char_u	*temp_result;
15271     char_u	*nextcmd = NULL;
15272 
15273     if (expr_end == NULL || in_end == NULL)
15274 	return NULL;
15275     *expr_start	= NUL;
15276     *expr_end = NUL;
15277     c1 = *in_end;
15278     *in_end = NUL;
15279 
15280     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15281     if (temp_result != NULL && nextcmd == NULL)
15282     {
15283 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15284 						   + (in_end - expr_end) + 1));
15285 	if (retval != NULL)
15286 	{
15287 	    STRCPY(retval, in_start);
15288 	    STRCAT(retval, temp_result);
15289 	    STRCAT(retval, expr_end + 1);
15290 	}
15291     }
15292     vim_free(temp_result);
15293 
15294     *in_end = c1;		/* put char back for error messages */
15295     *expr_start = '{';
15296     *expr_end = '}';
15297 
15298     if (retval != NULL)
15299     {
15300 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15301 	if (expr_start != NULL)
15302 	{
15303 	    /* Further expansion! */
15304 	    temp_result = make_expanded_name(retval, expr_start,
15305 						       expr_end, temp_result);
15306 	    vim_free(retval);
15307 	    retval = temp_result;
15308 	}
15309     }
15310 
15311     return retval;
15312 }
15313 
15314 /*
15315  * Return TRUE if character "c" can be used in a variable or function name.
15316  * Does not include '{' or '}' for magic braces.
15317  */
15318     static int
15319 eval_isnamec(c)
15320     int	    c;
15321 {
15322     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15323 }
15324 
15325 /*
15326  * Return TRUE if character "c" can be used as the first character in a
15327  * variable or function name (excluding '{' and '}').
15328  */
15329     static int
15330 eval_isnamec1(c)
15331     int	    c;
15332 {
15333     return (ASCII_ISALPHA(c) || c == '_');
15334 }
15335 
15336 /*
15337  * Set number v: variable to "val".
15338  */
15339     void
15340 set_vim_var_nr(idx, val)
15341     int		idx;
15342     long	val;
15343 {
15344     vimvars[idx].vv_nr = val;
15345 }
15346 
15347 /*
15348  * Get number v: variable value.
15349  */
15350     long
15351 get_vim_var_nr(idx)
15352     int		idx;
15353 {
15354     return vimvars[idx].vv_nr;
15355 }
15356 
15357 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15358 /*
15359  * Get string v: variable value.  Uses a static buffer, can only be used once.
15360  */
15361     char_u *
15362 get_vim_var_str(idx)
15363     int		idx;
15364 {
15365     return get_tv_string(&vimvars[idx].vv_tv);
15366 }
15367 #endif
15368 
15369 /*
15370  * Set v:count, v:count1 and v:prevcount.
15371  */
15372     void
15373 set_vcount(count, count1)
15374     long	count;
15375     long	count1;
15376 {
15377     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15378     vimvars[VV_COUNT].vv_nr = count;
15379     vimvars[VV_COUNT1].vv_nr = count1;
15380 }
15381 
15382 /*
15383  * Set string v: variable to a copy of "val".
15384  */
15385     void
15386 set_vim_var_string(idx, val, len)
15387     int		idx;
15388     char_u	*val;
15389     int		len;	    /* length of "val" to use or -1 (whole string) */
15390 {
15391     /* Need to do this (at least) once, since we can't initialize a union.
15392      * Will always be invoked when "v:progname" is set. */
15393     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15394 
15395     vim_free(vimvars[idx].vv_str);
15396     if (val == NULL)
15397 	vimvars[idx].vv_str = NULL;
15398     else if (len == -1)
15399 	vimvars[idx].vv_str = vim_strsave(val);
15400     else
15401 	vimvars[idx].vv_str = vim_strnsave(val, len);
15402 }
15403 
15404 /*
15405  * Set v:register if needed.
15406  */
15407     void
15408 set_reg_var(c)
15409     int		c;
15410 {
15411     char_u	regname;
15412 
15413     if (c == 0 || c == ' ')
15414 	regname = '"';
15415     else
15416 	regname = c;
15417     /* Avoid free/alloc when the value is already right. */
15418     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15419 	set_vim_var_string(VV_REG, &regname, 1);
15420 }
15421 
15422 /*
15423  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15424  * Otherwise, restore the value to "oldval" and return NULL.
15425  * Must always be called in pairs to save and restore v:exception!  Does not
15426  * take care of memory allocations.
15427  */
15428     char_u *
15429 v_exception(oldval)
15430     char_u	*oldval;
15431 {
15432     if (oldval == NULL)
15433 	return vimvars[VV_EXCEPTION].vv_str;
15434 
15435     vimvars[VV_EXCEPTION].vv_str = oldval;
15436     return NULL;
15437 }
15438 
15439 /*
15440  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15441  * Otherwise, restore the value to "oldval" and return NULL.
15442  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15443  * take care of memory allocations.
15444  */
15445     char_u *
15446 v_throwpoint(oldval)
15447     char_u	*oldval;
15448 {
15449     if (oldval == NULL)
15450 	return vimvars[VV_THROWPOINT].vv_str;
15451 
15452     vimvars[VV_THROWPOINT].vv_str = oldval;
15453     return NULL;
15454 }
15455 
15456 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15457 /*
15458  * Set v:cmdarg.
15459  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15460  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15461  * Must always be called in pairs!
15462  */
15463     char_u *
15464 set_cmdarg(eap, oldarg)
15465     exarg_T	*eap;
15466     char_u	*oldarg;
15467 {
15468     char_u	*oldval;
15469     char_u	*newval;
15470     unsigned	len;
15471 
15472     oldval = vimvars[VV_CMDARG].vv_str;
15473     if (eap == NULL)
15474     {
15475 	vim_free(oldval);
15476 	vimvars[VV_CMDARG].vv_str = oldarg;
15477 	return NULL;
15478     }
15479 
15480     if (eap->force_bin == FORCE_BIN)
15481 	len = 6;
15482     else if (eap->force_bin == FORCE_NOBIN)
15483 	len = 8;
15484     else
15485 	len = 0;
15486     if (eap->force_ff != 0)
15487 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15488 # ifdef FEAT_MBYTE
15489     if (eap->force_enc != 0)
15490 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15491 # endif
15492 
15493     newval = alloc(len + 1);
15494     if (newval == NULL)
15495 	return NULL;
15496 
15497     if (eap->force_bin == FORCE_BIN)
15498 	sprintf((char *)newval, " ++bin");
15499     else if (eap->force_bin == FORCE_NOBIN)
15500 	sprintf((char *)newval, " ++nobin");
15501     else
15502 	*newval = NUL;
15503     if (eap->force_ff != 0)
15504 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15505 						eap->cmd + eap->force_ff);
15506 # ifdef FEAT_MBYTE
15507     if (eap->force_enc != 0)
15508 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15509 					       eap->cmd + eap->force_enc);
15510 # endif
15511     vimvars[VV_CMDARG].vv_str = newval;
15512     return oldval;
15513 }
15514 #endif
15515 
15516 /*
15517  * Get the value of internal variable "name".
15518  * Return OK or FAIL.
15519  */
15520     static int
15521 get_var_tv(name, len, rettv, verbose)
15522     char_u	*name;
15523     int		len;		/* length of "name" */
15524     typval_T	*rettv;		/* NULL when only checking existence */
15525     int		verbose;	/* may give error message */
15526 {
15527     int		ret = OK;
15528     typval_T	*tv = NULL;
15529     typval_T	atv;
15530     dictitem_T	*v;
15531     int		cc;
15532 
15533     /* truncate the name, so that we can use strcmp() */
15534     cc = name[len];
15535     name[len] = NUL;
15536 
15537     /*
15538      * Check for "b:changedtick".
15539      */
15540     if (STRCMP(name, "b:changedtick") == 0)
15541     {
15542 	atv.v_type = VAR_NUMBER;
15543 	atv.vval.v_number = curbuf->b_changedtick;
15544 	tv = &atv;
15545     }
15546 
15547     /*
15548      * Check for user-defined variables.
15549      */
15550     else
15551     {
15552 	v = find_var(name, NULL);
15553 	if (v != NULL)
15554 	    tv = &v->di_tv;
15555     }
15556 
15557     if (tv == NULL)
15558     {
15559 	if (rettv != NULL && verbose)
15560 	    EMSG2(_(e_undefvar), name);
15561 	ret = FAIL;
15562     }
15563     else if (rettv != NULL)
15564 	copy_tv(tv, rettv);
15565 
15566     name[len] = cc;
15567 
15568     return ret;
15569 }
15570 
15571 /*
15572  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15573  * Also handle function call with Funcref variable: func(expr)
15574  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15575  */
15576     static int
15577 handle_subscript(arg, rettv, evaluate, verbose)
15578     char_u	**arg;
15579     typval_T	*rettv;
15580     int		evaluate;	/* do more than finding the end */
15581     int		verbose;	/* give error messages */
15582 {
15583     int		ret = OK;
15584     dict_T	*selfdict = NULL;
15585     char_u	*s;
15586     int		len;
15587     typval_T	functv;
15588 
15589     while (ret == OK
15590 	    && (**arg == '['
15591 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15592 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15593 	    && !vim_iswhite(*(*arg - 1)))
15594     {
15595 	if (**arg == '(')
15596 	{
15597 	    /* need to copy the funcref so that we can clear rettv */
15598 	    functv = *rettv;
15599 	    rettv->v_type = VAR_UNKNOWN;
15600 
15601 	    /* Invoke the function.  Recursive! */
15602 	    s = functv.vval.v_string;
15603 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15604 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15605 			&len, evaluate, selfdict);
15606 
15607 	    /* Clear the funcref afterwards, so that deleting it while
15608 	     * evaluating the arguments is possible (see test55). */
15609 	    clear_tv(&functv);
15610 
15611 	    /* Stop the expression evaluation when immediately aborting on
15612 	     * error, or when an interrupt occurred or an exception was thrown
15613 	     * but not caught. */
15614 	    if (aborting())
15615 	    {
15616 		if (ret == OK)
15617 		    clear_tv(rettv);
15618 		ret = FAIL;
15619 	    }
15620 	    dict_unref(selfdict);
15621 	    selfdict = NULL;
15622 	}
15623 	else /* **arg == '[' || **arg == '.' */
15624 	{
15625 	    dict_unref(selfdict);
15626 	    if (rettv->v_type == VAR_DICT)
15627 	    {
15628 		selfdict = rettv->vval.v_dict;
15629 		if (selfdict != NULL)
15630 		    ++selfdict->dv_refcount;
15631 	    }
15632 	    else
15633 		selfdict = NULL;
15634 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15635 	    {
15636 		clear_tv(rettv);
15637 		ret = FAIL;
15638 	    }
15639 	}
15640     }
15641     dict_unref(selfdict);
15642     return ret;
15643 }
15644 
15645 /*
15646  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15647  * value).
15648  */
15649     static typval_T *
15650 alloc_tv()
15651 {
15652     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15653 }
15654 
15655 /*
15656  * Allocate memory for a variable type-value, and assign a string to it.
15657  * The string "s" must have been allocated, it is consumed.
15658  * Return NULL for out of memory, the variable otherwise.
15659  */
15660     static typval_T *
15661 alloc_string_tv(s)
15662     char_u	*s;
15663 {
15664     typval_T	*rettv;
15665 
15666     rettv = alloc_tv();
15667     if (rettv != NULL)
15668     {
15669 	rettv->v_type = VAR_STRING;
15670 	rettv->vval.v_string = s;
15671     }
15672     else
15673 	vim_free(s);
15674     return rettv;
15675 }
15676 
15677 /*
15678  * Free the memory for a variable type-value.
15679  */
15680     static void
15681 free_tv(varp)
15682     typval_T *varp;
15683 {
15684     if (varp != NULL)
15685     {
15686 	switch (varp->v_type)
15687 	{
15688 	    case VAR_FUNC:
15689 		func_unref(varp->vval.v_string);
15690 		/*FALLTHROUGH*/
15691 	    case VAR_STRING:
15692 		vim_free(varp->vval.v_string);
15693 		break;
15694 	    case VAR_LIST:
15695 		list_unref(varp->vval.v_list);
15696 		break;
15697 	    case VAR_DICT:
15698 		dict_unref(varp->vval.v_dict);
15699 		break;
15700 	    case VAR_NUMBER:
15701 	    case VAR_UNKNOWN:
15702 		break;
15703 	    default:
15704 		EMSG2(_(e_intern2), "free_tv()");
15705 		break;
15706 	}
15707 	vim_free(varp);
15708     }
15709 }
15710 
15711 /*
15712  * Free the memory for a variable value and set the value to NULL or 0.
15713  */
15714     void
15715 clear_tv(varp)
15716     typval_T *varp;
15717 {
15718     if (varp != NULL)
15719     {
15720 	switch (varp->v_type)
15721 	{
15722 	    case VAR_FUNC:
15723 		func_unref(varp->vval.v_string);
15724 		/*FALLTHROUGH*/
15725 	    case VAR_STRING:
15726 		vim_free(varp->vval.v_string);
15727 		varp->vval.v_string = NULL;
15728 		break;
15729 	    case VAR_LIST:
15730 		list_unref(varp->vval.v_list);
15731 		varp->vval.v_list = NULL;
15732 		break;
15733 	    case VAR_DICT:
15734 		dict_unref(varp->vval.v_dict);
15735 		varp->vval.v_dict = NULL;
15736 		break;
15737 	    case VAR_NUMBER:
15738 		varp->vval.v_number = 0;
15739 		break;
15740 	    case VAR_UNKNOWN:
15741 		break;
15742 	    default:
15743 		EMSG2(_(e_intern2), "clear_tv()");
15744 	}
15745 	varp->v_lock = 0;
15746     }
15747 }
15748 
15749 /*
15750  * Set the value of a variable to NULL without freeing items.
15751  */
15752     static void
15753 init_tv(varp)
15754     typval_T *varp;
15755 {
15756     if (varp != NULL)
15757 	vim_memset(varp, 0, sizeof(typval_T));
15758 }
15759 
15760 /*
15761  * Get the number value of a variable.
15762  * If it is a String variable, uses vim_str2nr().
15763  * For incompatible types, return 0.
15764  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15765  * caller of incompatible types: it sets *denote to TRUE if "denote"
15766  * is not NULL or returns -1 otherwise.
15767  */
15768     static long
15769 get_tv_number(varp)
15770     typval_T	*varp;
15771 {
15772     int		error = FALSE;
15773 
15774     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15775 }
15776 
15777     long
15778 get_tv_number_chk(varp, denote)
15779     typval_T	*varp;
15780     int		*denote;
15781 {
15782     long	n = 0L;
15783 
15784     switch (varp->v_type)
15785     {
15786 	case VAR_NUMBER:
15787 	    return (long)(varp->vval.v_number);
15788 	case VAR_FUNC:
15789 	    EMSG(_("E703: Using a Funcref as a number"));
15790 	    break;
15791 	case VAR_STRING:
15792 	    if (varp->vval.v_string != NULL)
15793 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15794 							TRUE, TRUE, &n, NULL);
15795 	    return n;
15796 	case VAR_LIST:
15797 	    EMSG(_("E745: Using a List as a number"));
15798 	    break;
15799 	case VAR_DICT:
15800 	    EMSG(_("E728: Using a Dictionary as a number"));
15801 	    break;
15802 	default:
15803 	    EMSG2(_(e_intern2), "get_tv_number()");
15804 	    break;
15805     }
15806     if (denote == NULL)		/* useful for values that must be unsigned */
15807 	n = -1;
15808     else
15809 	*denote = TRUE;
15810     return n;
15811 }
15812 
15813 /*
15814  * Get the lnum from the first argument.
15815  * Also accepts ".", "$", etc., but that only works for the current buffer.
15816  * Returns -1 on error.
15817  */
15818     static linenr_T
15819 get_tv_lnum(argvars)
15820     typval_T	*argvars;
15821 {
15822     typval_T	rettv;
15823     linenr_T	lnum;
15824 
15825     lnum = get_tv_number_chk(&argvars[0], NULL);
15826     if (lnum == 0)  /* no valid number, try using line() */
15827     {
15828 	rettv.v_type = VAR_NUMBER;
15829 	f_line(argvars, &rettv);
15830 	lnum = rettv.vval.v_number;
15831 	clear_tv(&rettv);
15832     }
15833     return lnum;
15834 }
15835 
15836 /*
15837  * Get the lnum from the first argument.
15838  * Also accepts "$", then "buf" is used.
15839  * Returns 0 on error.
15840  */
15841     static linenr_T
15842 get_tv_lnum_buf(argvars, buf)
15843     typval_T	*argvars;
15844     buf_T	*buf;
15845 {
15846     if (argvars[0].v_type == VAR_STRING
15847 	    && argvars[0].vval.v_string != NULL
15848 	    && argvars[0].vval.v_string[0] == '$'
15849 	    && buf != NULL)
15850 	return buf->b_ml.ml_line_count;
15851     return get_tv_number_chk(&argvars[0], NULL);
15852 }
15853 
15854 /*
15855  * Get the string value of a variable.
15856  * If it is a Number variable, the number is converted into a string.
15857  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
15858  * get_tv_string_buf() uses a given buffer.
15859  * If the String variable has never been set, return an empty string.
15860  * Never returns NULL;
15861  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
15862  * NULL on error.
15863  */
15864     static char_u *
15865 get_tv_string(varp)
15866     typval_T	*varp;
15867 {
15868     static char_u   mybuf[NUMBUFLEN];
15869 
15870     return get_tv_string_buf(varp, mybuf);
15871 }
15872 
15873     static char_u *
15874 get_tv_string_buf(varp, buf)
15875     typval_T	*varp;
15876     char_u	*buf;
15877 {
15878     char_u	*res =  get_tv_string_buf_chk(varp, buf);
15879 
15880     return res != NULL ? res : (char_u *)"";
15881 }
15882 
15883     char_u *
15884 get_tv_string_chk(varp)
15885     typval_T	*varp;
15886 {
15887     static char_u   mybuf[NUMBUFLEN];
15888 
15889     return get_tv_string_buf_chk(varp, mybuf);
15890 }
15891 
15892     static char_u *
15893 get_tv_string_buf_chk(varp, buf)
15894     typval_T	*varp;
15895     char_u	*buf;
15896 {
15897     switch (varp->v_type)
15898     {
15899 	case VAR_NUMBER:
15900 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
15901 	    return buf;
15902 	case VAR_FUNC:
15903 	    EMSG(_("E729: using Funcref as a String"));
15904 	    break;
15905 	case VAR_LIST:
15906 	    EMSG(_("E730: using List as a String"));
15907 	    break;
15908 	case VAR_DICT:
15909 	    EMSG(_("E731: using Dictionary as a String"));
15910 	    break;
15911 	case VAR_STRING:
15912 	    if (varp->vval.v_string != NULL)
15913 		return varp->vval.v_string;
15914 	    return (char_u *)"";
15915 	default:
15916 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
15917 	    break;
15918     }
15919     return NULL;
15920 }
15921 
15922 /*
15923  * Find variable "name" in the list of variables.
15924  * Return a pointer to it if found, NULL if not found.
15925  * Careful: "a:0" variables don't have a name.
15926  * When "htp" is not NULL we are writing to the variable, set "htp" to the
15927  * hashtab_T used.
15928  */
15929     static dictitem_T *
15930 find_var(name, htp)
15931     char_u	*name;
15932     hashtab_T	**htp;
15933 {
15934     char_u	*varname;
15935     hashtab_T	*ht;
15936 
15937     ht = find_var_ht(name, &varname);
15938     if (htp != NULL)
15939 	*htp = ht;
15940     if (ht == NULL)
15941 	return NULL;
15942     return find_var_in_ht(ht, varname, htp != NULL);
15943 }
15944 
15945 /*
15946  * Find variable "varname" in hashtab "ht".
15947  * Returns NULL if not found.
15948  */
15949     static dictitem_T *
15950 find_var_in_ht(ht, varname, writing)
15951     hashtab_T	*ht;
15952     char_u	*varname;
15953     int		writing;
15954 {
15955     hashitem_T	*hi;
15956 
15957     if (*varname == NUL)
15958     {
15959 	/* Must be something like "s:", otherwise "ht" would be NULL. */
15960 	switch (varname[-2])
15961 	{
15962 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
15963 	    case 'g': return &globvars_var;
15964 	    case 'v': return &vimvars_var;
15965 	    case 'b': return &curbuf->b_bufvar;
15966 	    case 'w': return &curwin->w_winvar;
15967 	    case 'l': return current_funccal == NULL
15968 					? NULL : &current_funccal->l_vars_var;
15969 	    case 'a': return current_funccal == NULL
15970 				       ? NULL : &current_funccal->l_avars_var;
15971 	}
15972 	return NULL;
15973     }
15974 
15975     hi = hash_find(ht, varname);
15976     if (HASHITEM_EMPTY(hi))
15977     {
15978 	/* For global variables we may try auto-loading the script.  If it
15979 	 * worked find the variable again.  Don't auto-load a script if it was
15980 	 * loaded already, otherwise it would be loaded every time when
15981 	 * checking if a function name is a Funcref variable. */
15982 	if (ht == &globvarht && !writing
15983 			    && script_autoload(varname, FALSE) && !aborting())
15984 	    hi = hash_find(ht, varname);
15985 	if (HASHITEM_EMPTY(hi))
15986 	    return NULL;
15987     }
15988     return HI2DI(hi);
15989 }
15990 
15991 /*
15992  * Find the hashtab used for a variable name.
15993  * Set "varname" to the start of name without ':'.
15994  */
15995     static hashtab_T *
15996 find_var_ht(name, varname)
15997     char_u  *name;
15998     char_u  **varname;
15999 {
16000     hashitem_T	*hi;
16001 
16002     if (name[1] != ':')
16003     {
16004 	/* The name must not start with a colon or #. */
16005 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
16006 	    return NULL;
16007 	*varname = name;
16008 
16009 	/* "version" is "v:version" in all scopes */
16010 	hi = hash_find(&compat_hashtab, name);
16011 	if (!HASHITEM_EMPTY(hi))
16012 	    return &compat_hashtab;
16013 
16014 	if (current_funccal == NULL)
16015 	    return &globvarht;			/* global variable */
16016 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
16017     }
16018     *varname = name + 2;
16019     if (*name == 'g')				/* global variable */
16020 	return &globvarht;
16021     /* There must be no ':' or '#' in the rest of the name, unless g: is used
16022      */
16023     if (vim_strchr(name + 2, ':') != NULL
16024 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
16025 	return NULL;
16026     if (*name == 'b')				/* buffer variable */
16027 	return &curbuf->b_vars.dv_hashtab;
16028     if (*name == 'w')				/* window variable */
16029 	return &curwin->w_vars.dv_hashtab;
16030     if (*name == 'v')				/* v: variable */
16031 	return &vimvarht;
16032     if (*name == 'a' && current_funccal != NULL) /* function argument */
16033 	return &current_funccal->l_avars.dv_hashtab;
16034     if (*name == 'l' && current_funccal != NULL) /* local function variable */
16035 	return &current_funccal->l_vars.dv_hashtab;
16036     if (*name == 's'				/* script variable */
16037 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
16038 	return &SCRIPT_VARS(current_SID);
16039     return NULL;
16040 }
16041 
16042 /*
16043  * Get the string value of a (global/local) variable.
16044  * Returns NULL when it doesn't exist.
16045  */
16046     char_u *
16047 get_var_value(name)
16048     char_u	*name;
16049 {
16050     dictitem_T	*v;
16051 
16052     v = find_var(name, NULL);
16053     if (v == NULL)
16054 	return NULL;
16055     return get_tv_string(&v->di_tv);
16056 }
16057 
16058 /*
16059  * Allocate a new hashtab for a sourced script.  It will be used while
16060  * sourcing this script and when executing functions defined in the script.
16061  */
16062     void
16063 new_script_vars(id)
16064     scid_T id;
16065 {
16066     int		i;
16067     hashtab_T	*ht;
16068     scriptvar_T *sv;
16069 
16070     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
16071     {
16072 	/* Re-allocating ga_data means that an ht_array pointing to
16073 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
16074 	 * at its init value.  Also reset "v_dict", it's always the same. */
16075 	for (i = 1; i <= ga_scripts.ga_len; ++i)
16076 	{
16077 	    ht = &SCRIPT_VARS(i);
16078 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
16079 		ht->ht_array = ht->ht_smallarray;
16080 	    sv = &SCRIPT_SV(i);
16081 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
16082 	}
16083 
16084 	while (ga_scripts.ga_len < id)
16085 	{
16086 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
16087 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
16088 	    ++ga_scripts.ga_len;
16089 	}
16090     }
16091 }
16092 
16093 /*
16094  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
16095  * point to it.
16096  */
16097     void
16098 init_var_dict(dict, dict_var)
16099     dict_T	*dict;
16100     dictitem_T	*dict_var;
16101 {
16102     hash_init(&dict->dv_hashtab);
16103     dict->dv_refcount = 99999;
16104     dict_var->di_tv.vval.v_dict = dict;
16105     dict_var->di_tv.v_type = VAR_DICT;
16106     dict_var->di_tv.v_lock = VAR_FIXED;
16107     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
16108     dict_var->di_key[0] = NUL;
16109 }
16110 
16111 /*
16112  * Clean up a list of internal variables.
16113  * Frees all allocated variables and the value they contain.
16114  * Clears hashtab "ht", does not free it.
16115  */
16116     void
16117 vars_clear(ht)
16118     hashtab_T *ht;
16119 {
16120     vars_clear_ext(ht, TRUE);
16121 }
16122 
16123 /*
16124  * Like vars_clear(), but only free the value if "free_val" is TRUE.
16125  */
16126     static void
16127 vars_clear_ext(ht, free_val)
16128     hashtab_T	*ht;
16129     int		free_val;
16130 {
16131     int		todo;
16132     hashitem_T	*hi;
16133     dictitem_T	*v;
16134 
16135     hash_lock(ht);
16136     todo = ht->ht_used;
16137     for (hi = ht->ht_array; todo > 0; ++hi)
16138     {
16139 	if (!HASHITEM_EMPTY(hi))
16140 	{
16141 	    --todo;
16142 
16143 	    /* Free the variable.  Don't remove it from the hashtab,
16144 	     * ht_array might change then.  hash_clear() takes care of it
16145 	     * later. */
16146 	    v = HI2DI(hi);
16147 	    if (free_val)
16148 		clear_tv(&v->di_tv);
16149 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
16150 		vim_free(v);
16151 	}
16152     }
16153     hash_clear(ht);
16154     ht->ht_used = 0;
16155 }
16156 
16157 /*
16158  * Delete a variable from hashtab "ht" at item "hi".
16159  * Clear the variable value and free the dictitem.
16160  */
16161     static void
16162 delete_var(ht, hi)
16163     hashtab_T	*ht;
16164     hashitem_T	*hi;
16165 {
16166     dictitem_T	*di = HI2DI(hi);
16167 
16168     hash_remove(ht, hi);
16169     clear_tv(&di->di_tv);
16170     vim_free(di);
16171 }
16172 
16173 /*
16174  * List the value of one internal variable.
16175  */
16176     static void
16177 list_one_var(v, prefix)
16178     dictitem_T	*v;
16179     char_u	*prefix;
16180 {
16181     char_u	*tofree;
16182     char_u	*s;
16183     char_u	numbuf[NUMBUFLEN];
16184 
16185     s = echo_string(&v->di_tv, &tofree, numbuf);
16186     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16187 						s == NULL ? (char_u *)"" : s);
16188     vim_free(tofree);
16189 }
16190 
16191     static void
16192 list_one_var_a(prefix, name, type, string)
16193     char_u	*prefix;
16194     char_u	*name;
16195     int		type;
16196     char_u	*string;
16197 {
16198     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16199     if (name != NULL)	/* "a:" vars don't have a name stored */
16200 	msg_puts(name);
16201     msg_putchar(' ');
16202     msg_advance(22);
16203     if (type == VAR_NUMBER)
16204 	msg_putchar('#');
16205     else if (type == VAR_FUNC)
16206 	msg_putchar('*');
16207     else if (type == VAR_LIST)
16208     {
16209 	msg_putchar('[');
16210 	if (*string == '[')
16211 	    ++string;
16212     }
16213     else if (type == VAR_DICT)
16214     {
16215 	msg_putchar('{');
16216 	if (*string == '{')
16217 	    ++string;
16218     }
16219     else
16220 	msg_putchar(' ');
16221 
16222     msg_outtrans(string);
16223 
16224     if (type == VAR_FUNC)
16225 	msg_puts((char_u *)"()");
16226 }
16227 
16228 /*
16229  * Set variable "name" to value in "tv".
16230  * If the variable already exists, the value is updated.
16231  * Otherwise the variable is created.
16232  */
16233     static void
16234 set_var(name, tv, copy)
16235     char_u	*name;
16236     typval_T	*tv;
16237     int		copy;	    /* make copy of value in "tv" */
16238 {
16239     dictitem_T	*v;
16240     char_u	*varname;
16241     hashtab_T	*ht;
16242     char_u	*p;
16243 
16244     if (tv->v_type == VAR_FUNC)
16245     {
16246 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16247 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16248 							 ? name[2] : name[0]))
16249 	{
16250 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16251 	    return;
16252 	}
16253 	if (function_exists(name))
16254 	{
16255 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16256 									name);
16257 	    return;
16258 	}
16259     }
16260 
16261     ht = find_var_ht(name, &varname);
16262     if (ht == NULL || *varname == NUL)
16263     {
16264 	EMSG2(_(e_illvar), name);
16265 	return;
16266     }
16267 
16268     v = find_var_in_ht(ht, varname, TRUE);
16269     if (v != NULL)
16270     {
16271 	/* existing variable, need to clear the value */
16272 	if (var_check_ro(v->di_flags, name)
16273 				      || tv_check_lock(v->di_tv.v_lock, name))
16274 	    return;
16275 	if (v->di_tv.v_type != tv->v_type
16276 		&& !((v->di_tv.v_type == VAR_STRING
16277 			|| v->di_tv.v_type == VAR_NUMBER)
16278 		    && (tv->v_type == VAR_STRING
16279 			|| tv->v_type == VAR_NUMBER)))
16280 	{
16281 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16282 	    return;
16283 	}
16284 
16285 	/*
16286 	 * Handle setting internal v: variables separately: we don't change
16287 	 * the type.
16288 	 */
16289 	if (ht == &vimvarht)
16290 	{
16291 	    if (v->di_tv.v_type == VAR_STRING)
16292 	    {
16293 		vim_free(v->di_tv.vval.v_string);
16294 		if (copy || tv->v_type != VAR_STRING)
16295 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16296 		else
16297 		{
16298 		    /* Take over the string to avoid an extra alloc/free. */
16299 		    v->di_tv.vval.v_string = tv->vval.v_string;
16300 		    tv->vval.v_string = NULL;
16301 		}
16302 	    }
16303 	    else if (v->di_tv.v_type != VAR_NUMBER)
16304 		EMSG2(_(e_intern2), "set_var()");
16305 	    else
16306 		v->di_tv.vval.v_number = get_tv_number(tv);
16307 	    return;
16308 	}
16309 
16310 	clear_tv(&v->di_tv);
16311     }
16312     else		    /* add a new variable */
16313     {
16314 	/* Make sure the variable name is valid. */
16315 	for (p = varname; *p != NUL; ++p)
16316 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16317 	    {
16318 		EMSG2(_(e_illvar), varname);
16319 		return;
16320 	    }
16321 
16322 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16323 							  + STRLEN(varname)));
16324 	if (v == NULL)
16325 	    return;
16326 	STRCPY(v->di_key, varname);
16327 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16328 	{
16329 	    vim_free(v);
16330 	    return;
16331 	}
16332 	v->di_flags = 0;
16333     }
16334 
16335     if (copy || tv->v_type == VAR_NUMBER)
16336 	copy_tv(tv, &v->di_tv);
16337     else
16338     {
16339 	v->di_tv = *tv;
16340 	v->di_tv.v_lock = 0;
16341 	init_tv(tv);
16342     }
16343 }
16344 
16345 /*
16346  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16347  * Also give an error message.
16348  */
16349     static int
16350 var_check_ro(flags, name)
16351     int		flags;
16352     char_u	*name;
16353 {
16354     if (flags & DI_FLAGS_RO)
16355     {
16356 	EMSG2(_(e_readonlyvar), name);
16357 	return TRUE;
16358     }
16359     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16360     {
16361 	EMSG2(_(e_readonlysbx), name);
16362 	return TRUE;
16363     }
16364     return FALSE;
16365 }
16366 
16367 /*
16368  * Return TRUE if typeval "tv" is set to be locked (immutable).
16369  * Also give an error message, using "name".
16370  */
16371     static int
16372 tv_check_lock(lock, name)
16373     int		lock;
16374     char_u	*name;
16375 {
16376     if (lock & VAR_LOCKED)
16377     {
16378 	EMSG2(_("E741: Value is locked: %s"),
16379 				name == NULL ? (char_u *)_("Unknown") : name);
16380 	return TRUE;
16381     }
16382     if (lock & VAR_FIXED)
16383     {
16384 	EMSG2(_("E742: Cannot change value of %s"),
16385 				name == NULL ? (char_u *)_("Unknown") : name);
16386 	return TRUE;
16387     }
16388     return FALSE;
16389 }
16390 
16391 /*
16392  * Copy the values from typval_T "from" to typval_T "to".
16393  * When needed allocates string or increases reference count.
16394  * Does not make a copy of a list or dict but copies the reference!
16395  */
16396     static void
16397 copy_tv(from, to)
16398     typval_T *from;
16399     typval_T *to;
16400 {
16401     to->v_type = from->v_type;
16402     to->v_lock = 0;
16403     switch (from->v_type)
16404     {
16405 	case VAR_NUMBER:
16406 	    to->vval.v_number = from->vval.v_number;
16407 	    break;
16408 	case VAR_STRING:
16409 	case VAR_FUNC:
16410 	    if (from->vval.v_string == NULL)
16411 		to->vval.v_string = NULL;
16412 	    else
16413 	    {
16414 		to->vval.v_string = vim_strsave(from->vval.v_string);
16415 		if (from->v_type == VAR_FUNC)
16416 		    func_ref(to->vval.v_string);
16417 	    }
16418 	    break;
16419 	case VAR_LIST:
16420 	    if (from->vval.v_list == NULL)
16421 		to->vval.v_list = NULL;
16422 	    else
16423 	    {
16424 		to->vval.v_list = from->vval.v_list;
16425 		++to->vval.v_list->lv_refcount;
16426 	    }
16427 	    break;
16428 	case VAR_DICT:
16429 	    if (from->vval.v_dict == NULL)
16430 		to->vval.v_dict = NULL;
16431 	    else
16432 	    {
16433 		to->vval.v_dict = from->vval.v_dict;
16434 		++to->vval.v_dict->dv_refcount;
16435 	    }
16436 	    break;
16437 	default:
16438 	    EMSG2(_(e_intern2), "copy_tv()");
16439 	    break;
16440     }
16441 }
16442 
16443 /*
16444  * Make a copy of an item.
16445  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16446  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16447  * reference to an already copied list/dict can be used.
16448  * Returns FAIL or OK.
16449  */
16450     static int
16451 item_copy(from, to, deep, copyID)
16452     typval_T	*from;
16453     typval_T	*to;
16454     int		deep;
16455     int		copyID;
16456 {
16457     static int	recurse = 0;
16458     int		ret = OK;
16459 
16460     if (recurse >= DICT_MAXNEST)
16461     {
16462 	EMSG(_("E698: variable nested too deep for making a copy"));
16463 	return FAIL;
16464     }
16465     ++recurse;
16466 
16467     switch (from->v_type)
16468     {
16469 	case VAR_NUMBER:
16470 	case VAR_STRING:
16471 	case VAR_FUNC:
16472 	    copy_tv(from, to);
16473 	    break;
16474 	case VAR_LIST:
16475 	    to->v_type = VAR_LIST;
16476 	    to->v_lock = 0;
16477 	    if (from->vval.v_list == NULL)
16478 		to->vval.v_list = NULL;
16479 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16480 	    {
16481 		/* use the copy made earlier */
16482 		to->vval.v_list = from->vval.v_list->lv_copylist;
16483 		++to->vval.v_list->lv_refcount;
16484 	    }
16485 	    else
16486 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16487 	    if (to->vval.v_list == NULL)
16488 		ret = FAIL;
16489 	    break;
16490 	case VAR_DICT:
16491 	    to->v_type = VAR_DICT;
16492 	    to->v_lock = 0;
16493 	    if (from->vval.v_dict == NULL)
16494 		to->vval.v_dict = NULL;
16495 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16496 	    {
16497 		/* use the copy made earlier */
16498 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16499 		++to->vval.v_dict->dv_refcount;
16500 	    }
16501 	    else
16502 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16503 	    if (to->vval.v_dict == NULL)
16504 		ret = FAIL;
16505 	    break;
16506 	default:
16507 	    EMSG2(_(e_intern2), "item_copy()");
16508 	    ret = FAIL;
16509     }
16510     --recurse;
16511     return ret;
16512 }
16513 
16514 /*
16515  * ":echo expr1 ..."	print each argument separated with a space, add a
16516  *			newline at the end.
16517  * ":echon expr1 ..."	print each argument plain.
16518  */
16519     void
16520 ex_echo(eap)
16521     exarg_T	*eap;
16522 {
16523     char_u	*arg = eap->arg;
16524     typval_T	rettv;
16525     char_u	*tofree;
16526     char_u	*p;
16527     int		needclr = TRUE;
16528     int		atstart = TRUE;
16529     char_u	numbuf[NUMBUFLEN];
16530 
16531     if (eap->skip)
16532 	++emsg_skip;
16533     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16534     {
16535 	p = arg;
16536 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16537 	{
16538 	    /*
16539 	     * Report the invalid expression unless the expression evaluation
16540 	     * has been cancelled due to an aborting error, an interrupt, or an
16541 	     * exception.
16542 	     */
16543 	    if (!aborting())
16544 		EMSG2(_(e_invexpr2), p);
16545 	    break;
16546 	}
16547 	if (!eap->skip)
16548 	{
16549 	    if (atstart)
16550 	    {
16551 		atstart = FALSE;
16552 		/* Call msg_start() after eval1(), evaluating the expression
16553 		 * may cause a message to appear. */
16554 		if (eap->cmdidx == CMD_echo)
16555 		    msg_start();
16556 	    }
16557 	    else if (eap->cmdidx == CMD_echo)
16558 		msg_puts_attr((char_u *)" ", echo_attr);
16559 	    p = echo_string(&rettv, &tofree, numbuf);
16560 	    if (p != NULL)
16561 		for ( ; *p != NUL && !got_int; ++p)
16562 		{
16563 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16564 		    {
16565 			if (*p != TAB && needclr)
16566 			{
16567 			    /* remove any text still there from the command */
16568 			    msg_clr_eos();
16569 			    needclr = FALSE;
16570 			}
16571 			msg_putchar_attr(*p, echo_attr);
16572 		    }
16573 		    else
16574 		    {
16575 #ifdef FEAT_MBYTE
16576 			if (has_mbyte)
16577 			{
16578 			    int i = (*mb_ptr2len)(p);
16579 
16580 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16581 			    p += i - 1;
16582 			}
16583 			else
16584 #endif
16585 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16586 		    }
16587 		}
16588 	    vim_free(tofree);
16589 	}
16590 	clear_tv(&rettv);
16591 	arg = skipwhite(arg);
16592     }
16593     eap->nextcmd = check_nextcmd(arg);
16594 
16595     if (eap->skip)
16596 	--emsg_skip;
16597     else
16598     {
16599 	/* remove text that may still be there from the command */
16600 	if (needclr)
16601 	    msg_clr_eos();
16602 	if (eap->cmdidx == CMD_echo)
16603 	    msg_end();
16604     }
16605 }
16606 
16607 /*
16608  * ":echohl {name}".
16609  */
16610     void
16611 ex_echohl(eap)
16612     exarg_T	*eap;
16613 {
16614     int		id;
16615 
16616     id = syn_name2id(eap->arg);
16617     if (id == 0)
16618 	echo_attr = 0;
16619     else
16620 	echo_attr = syn_id2attr(id);
16621 }
16622 
16623 /*
16624  * ":execute expr1 ..."	execute the result of an expression.
16625  * ":echomsg expr1 ..."	Print a message
16626  * ":echoerr expr1 ..."	Print an error
16627  * Each gets spaces around each argument and a newline at the end for
16628  * echo commands
16629  */
16630     void
16631 ex_execute(eap)
16632     exarg_T	*eap;
16633 {
16634     char_u	*arg = eap->arg;
16635     typval_T	rettv;
16636     int		ret = OK;
16637     char_u	*p;
16638     garray_T	ga;
16639     int		len;
16640     int		save_did_emsg;
16641 
16642     ga_init2(&ga, 1, 80);
16643 
16644     if (eap->skip)
16645 	++emsg_skip;
16646     while (*arg != NUL && *arg != '|' && *arg != '\n')
16647     {
16648 	p = arg;
16649 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16650 	{
16651 	    /*
16652 	     * Report the invalid expression unless the expression evaluation
16653 	     * has been cancelled due to an aborting error, an interrupt, or an
16654 	     * exception.
16655 	     */
16656 	    if (!aborting())
16657 		EMSG2(_(e_invexpr2), p);
16658 	    ret = FAIL;
16659 	    break;
16660 	}
16661 
16662 	if (!eap->skip)
16663 	{
16664 	    p = get_tv_string(&rettv);
16665 	    len = (int)STRLEN(p);
16666 	    if (ga_grow(&ga, len + 2) == FAIL)
16667 	    {
16668 		clear_tv(&rettv);
16669 		ret = FAIL;
16670 		break;
16671 	    }
16672 	    if (ga.ga_len)
16673 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16674 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16675 	    ga.ga_len += len;
16676 	}
16677 
16678 	clear_tv(&rettv);
16679 	arg = skipwhite(arg);
16680     }
16681 
16682     if (ret != FAIL && ga.ga_data != NULL)
16683     {
16684 	if (eap->cmdidx == CMD_echomsg)
16685 	    MSG_ATTR(ga.ga_data, echo_attr);
16686 	else if (eap->cmdidx == CMD_echoerr)
16687 	{
16688 	    /* We don't want to abort following commands, restore did_emsg. */
16689 	    save_did_emsg = did_emsg;
16690 	    EMSG((char_u *)ga.ga_data);
16691 	    if (!force_abort)
16692 		did_emsg = save_did_emsg;
16693 	}
16694 	else if (eap->cmdidx == CMD_execute)
16695 	    do_cmdline((char_u *)ga.ga_data,
16696 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16697     }
16698 
16699     ga_clear(&ga);
16700 
16701     if (eap->skip)
16702 	--emsg_skip;
16703 
16704     eap->nextcmd = check_nextcmd(arg);
16705 }
16706 
16707 /*
16708  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16709  * "arg" points to the "&" or '+' when called, to "option" when returning.
16710  * Returns NULL when no option name found.  Otherwise pointer to the char
16711  * after the option name.
16712  */
16713     static char_u *
16714 find_option_end(arg, opt_flags)
16715     char_u	**arg;
16716     int		*opt_flags;
16717 {
16718     char_u	*p = *arg;
16719 
16720     ++p;
16721     if (*p == 'g' && p[1] == ':')
16722     {
16723 	*opt_flags = OPT_GLOBAL;
16724 	p += 2;
16725     }
16726     else if (*p == 'l' && p[1] == ':')
16727     {
16728 	*opt_flags = OPT_LOCAL;
16729 	p += 2;
16730     }
16731     else
16732 	*opt_flags = 0;
16733 
16734     if (!ASCII_ISALPHA(*p))
16735 	return NULL;
16736     *arg = p;
16737 
16738     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16739 	p += 4;	    /* termcap option */
16740     else
16741 	while (ASCII_ISALPHA(*p))
16742 	    ++p;
16743     return p;
16744 }
16745 
16746 /*
16747  * ":function"
16748  */
16749     void
16750 ex_function(eap)
16751     exarg_T	*eap;
16752 {
16753     char_u	*theline;
16754     int		j;
16755     int		c;
16756     int		saved_did_emsg;
16757     char_u	*name = NULL;
16758     char_u	*p;
16759     char_u	*arg;
16760     garray_T	newargs;
16761     garray_T	newlines;
16762     int		varargs = FALSE;
16763     int		mustend = FALSE;
16764     int		flags = 0;
16765     ufunc_T	*fp;
16766     int		indent;
16767     int		nesting;
16768     char_u	*skip_until = NULL;
16769     dictitem_T	*v;
16770     funcdict_T	fudi;
16771     static int	func_nr = 0;	    /* number for nameless function */
16772     int		paren;
16773     hashtab_T	*ht;
16774     int		todo;
16775     hashitem_T	*hi;
16776 
16777     /*
16778      * ":function" without argument: list functions.
16779      */
16780     if (ends_excmd(*eap->arg))
16781     {
16782 	if (!eap->skip)
16783 	{
16784 	    todo = func_hashtab.ht_used;
16785 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16786 	    {
16787 		if (!HASHITEM_EMPTY(hi))
16788 		{
16789 		    --todo;
16790 		    fp = HI2UF(hi);
16791 		    if (!isdigit(*fp->uf_name))
16792 			list_func_head(fp, FALSE);
16793 		}
16794 	    }
16795 	}
16796 	eap->nextcmd = check_nextcmd(eap->arg);
16797 	return;
16798     }
16799 
16800     /*
16801      * Get the function name.  There are these situations:
16802      * func	    normal function name
16803      *		    "name" == func, "fudi.fd_dict" == NULL
16804      * dict.func    new dictionary entry
16805      *		    "name" == NULL, "fudi.fd_dict" set,
16806      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
16807      * dict.func    existing dict entry with a Funcref
16808      *		    "name" == func, "fudi.fd_dict" set,
16809      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16810      * dict.func    existing dict entry that's not a Funcref
16811      *		    "name" == NULL, "fudi.fd_dict" set,
16812      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16813      */
16814     p = eap->arg;
16815     name = trans_function_name(&p, eap->skip, 0, &fudi);
16816     paren = (vim_strchr(p, '(') != NULL);
16817     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
16818     {
16819 	/*
16820 	 * Return on an invalid expression in braces, unless the expression
16821 	 * evaluation has been cancelled due to an aborting error, an
16822 	 * interrupt, or an exception.
16823 	 */
16824 	if (!aborting())
16825 	{
16826 	    if (!eap->skip && fudi.fd_newkey != NULL)
16827 		EMSG2(_(e_dictkey), fudi.fd_newkey);
16828 	    vim_free(fudi.fd_newkey);
16829 	    return;
16830 	}
16831 	else
16832 	    eap->skip = TRUE;
16833     }
16834     /* An error in a function call during evaluation of an expression in magic
16835      * braces should not cause the function not to be defined. */
16836     saved_did_emsg = did_emsg;
16837     did_emsg = FALSE;
16838 
16839     /*
16840      * ":function func" with only function name: list function.
16841      */
16842     if (!paren)
16843     {
16844 	if (!ends_excmd(*skipwhite(p)))
16845 	{
16846 	    EMSG(_(e_trailing));
16847 	    goto ret_free;
16848 	}
16849 	eap->nextcmd = check_nextcmd(p);
16850 	if (eap->nextcmd != NULL)
16851 	    *p = NUL;
16852 	if (!eap->skip && !got_int)
16853 	{
16854 	    fp = find_func(name);
16855 	    if (fp != NULL)
16856 	    {
16857 		list_func_head(fp, TRUE);
16858 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
16859 		{
16860 		    msg_putchar('\n');
16861 		    msg_outnum((long)(j + 1));
16862 		    if (j < 9)
16863 			msg_putchar(' ');
16864 		    if (j < 99)
16865 			msg_putchar(' ');
16866 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
16867 		    out_flush();	/* show a line at a time */
16868 		    ui_breakcheck();
16869 		}
16870 		if (!got_int)
16871 		{
16872 		    msg_putchar('\n');
16873 		    msg_puts((char_u *)"   endfunction");
16874 		}
16875 	    }
16876 	    else
16877 		emsg_funcname("E123: Undefined function: %s", name);
16878 	}
16879 	goto ret_free;
16880     }
16881 
16882     /*
16883      * ":function name(arg1, arg2)" Define function.
16884      */
16885     p = skipwhite(p);
16886     if (*p != '(')
16887     {
16888 	if (!eap->skip)
16889 	{
16890 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
16891 	    goto ret_free;
16892 	}
16893 	/* attempt to continue by skipping some text */
16894 	if (vim_strchr(p, '(') != NULL)
16895 	    p = vim_strchr(p, '(');
16896     }
16897     p = skipwhite(p + 1);
16898 
16899     ga_init2(&newargs, (int)sizeof(char_u *), 3);
16900     ga_init2(&newlines, (int)sizeof(char_u *), 3);
16901 
16902     if (!eap->skip)
16903     {
16904 	/* Check the name of the function. */
16905 	if (name != NULL)
16906 	    arg = name;
16907 	else
16908 	    arg = fudi.fd_newkey;
16909 	if (arg != NULL)
16910 	{
16911 	    if (*arg == K_SPECIAL)
16912 		j = 3;
16913 	    else
16914 		j = 0;
16915 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
16916 						      : eval_isnamec(arg[j])))
16917 		++j;
16918 	    if (arg[j] != NUL)
16919 		emsg_funcname(_(e_invarg2), arg);
16920 	}
16921     }
16922 
16923     /*
16924      * Isolate the arguments: "arg1, arg2, ...)"
16925      */
16926     while (*p != ')')
16927     {
16928 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
16929 	{
16930 	    varargs = TRUE;
16931 	    p += 3;
16932 	    mustend = TRUE;
16933 	}
16934 	else
16935 	{
16936 	    arg = p;
16937 	    while (ASCII_ISALNUM(*p) || *p == '_')
16938 		++p;
16939 	    if (arg == p || isdigit(*arg)
16940 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
16941 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
16942 	    {
16943 		if (!eap->skip)
16944 		    EMSG2(_("E125: Illegal argument: %s"), arg);
16945 		break;
16946 	    }
16947 	    if (ga_grow(&newargs, 1) == FAIL)
16948 		goto erret;
16949 	    c = *p;
16950 	    *p = NUL;
16951 	    arg = vim_strsave(arg);
16952 	    if (arg == NULL)
16953 		goto erret;
16954 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
16955 	    *p = c;
16956 	    newargs.ga_len++;
16957 	    if (*p == ',')
16958 		++p;
16959 	    else
16960 		mustend = TRUE;
16961 	}
16962 	p = skipwhite(p);
16963 	if (mustend && *p != ')')
16964 	{
16965 	    if (!eap->skip)
16966 		EMSG2(_(e_invarg2), eap->arg);
16967 	    break;
16968 	}
16969     }
16970     ++p;	/* skip the ')' */
16971 
16972     /* find extra arguments "range", "dict" and "abort" */
16973     for (;;)
16974     {
16975 	p = skipwhite(p);
16976 	if (STRNCMP(p, "range", 5) == 0)
16977 	{
16978 	    flags |= FC_RANGE;
16979 	    p += 5;
16980 	}
16981 	else if (STRNCMP(p, "dict", 4) == 0)
16982 	{
16983 	    flags |= FC_DICT;
16984 	    p += 4;
16985 	}
16986 	else if (STRNCMP(p, "abort", 5) == 0)
16987 	{
16988 	    flags |= FC_ABORT;
16989 	    p += 5;
16990 	}
16991 	else
16992 	    break;
16993     }
16994 
16995     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
16996 	EMSG(_(e_trailing));
16997 
16998     /*
16999      * Read the body of the function, until ":endfunction" is found.
17000      */
17001     if (KeyTyped)
17002     {
17003 	/* Check if the function already exists, don't let the user type the
17004 	 * whole function before telling him it doesn't work!  For a script we
17005 	 * need to skip the body to be able to find what follows. */
17006 	if (!eap->skip && !eap->forceit)
17007 	{
17008 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
17009 		EMSG(_(e_funcdict));
17010 	    else if (name != NULL && find_func(name) != NULL)
17011 		emsg_funcname(e_funcexts, name);
17012 	}
17013 
17014 	if (!eap->skip && did_emsg)
17015 	    goto erret;
17016 
17017 	msg_putchar('\n');	    /* don't overwrite the function name */
17018 	cmdline_row = msg_row;
17019     }
17020 
17021     indent = 2;
17022     nesting = 0;
17023     for (;;)
17024     {
17025 	msg_scroll = TRUE;
17026 	need_wait_return = FALSE;
17027 	if (eap->getline == NULL)
17028 	    theline = getcmdline(':', 0L, indent);
17029 	else
17030 	    theline = eap->getline(':', eap->cookie, indent);
17031 	if (KeyTyped)
17032 	    lines_left = Rows - 1;
17033 	if (theline == NULL)
17034 	{
17035 	    EMSG(_("E126: Missing :endfunction"));
17036 	    goto erret;
17037 	}
17038 
17039 	if (skip_until != NULL)
17040 	{
17041 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
17042 	     * don't check for ":endfunc". */
17043 	    if (STRCMP(theline, skip_until) == 0)
17044 	    {
17045 		vim_free(skip_until);
17046 		skip_until = NULL;
17047 	    }
17048 	}
17049 	else
17050 	{
17051 	    /* skip ':' and blanks*/
17052 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
17053 		;
17054 
17055 	    /* Check for "endfunction". */
17056 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
17057 	    {
17058 		vim_free(theline);
17059 		break;
17060 	    }
17061 
17062 	    /* Increase indent inside "if", "while", "for" and "try", decrease
17063 	     * at "end". */
17064 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
17065 		indent -= 2;
17066 	    else if (STRNCMP(p, "if", 2) == 0
17067 		    || STRNCMP(p, "wh", 2) == 0
17068 		    || STRNCMP(p, "for", 3) == 0
17069 		    || STRNCMP(p, "try", 3) == 0)
17070 		indent += 2;
17071 
17072 	    /* Check for defining a function inside this function. */
17073 	    if (checkforcmd(&p, "function", 2))
17074 	    {
17075 		if (*p == '!')
17076 		    p = skipwhite(p + 1);
17077 		p += eval_fname_script(p);
17078 		if (ASCII_ISALPHA(*p))
17079 		{
17080 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
17081 		    if (*skipwhite(p) == '(')
17082 		    {
17083 			++nesting;
17084 			indent += 2;
17085 		    }
17086 		}
17087 	    }
17088 
17089 	    /* Check for ":append" or ":insert". */
17090 	    p = skip_range(p, NULL);
17091 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
17092 		    || (p[0] == 'i'
17093 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
17094 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
17095 		skip_until = vim_strsave((char_u *)".");
17096 
17097 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
17098 	    arg = skipwhite(skiptowhite(p));
17099 	    if (arg[0] == '<' && arg[1] =='<'
17100 		    && ((p[0] == 'p' && p[1] == 'y'
17101 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
17102 			|| (p[0] == 'p' && p[1] == 'e'
17103 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
17104 			|| (p[0] == 't' && p[1] == 'c'
17105 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
17106 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
17107 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
17108 			|| (p[0] == 'm' && p[1] == 'z'
17109 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
17110 			))
17111 	    {
17112 		/* ":python <<" continues until a dot, like ":append" */
17113 		p = skipwhite(arg + 2);
17114 		if (*p == NUL)
17115 		    skip_until = vim_strsave((char_u *)".");
17116 		else
17117 		    skip_until = vim_strsave(p);
17118 	    }
17119 	}
17120 
17121 	/* Add the line to the function. */
17122 	if (ga_grow(&newlines, 1) == FAIL)
17123 	{
17124 	    vim_free(theline);
17125 	    goto erret;
17126 	}
17127 
17128 	/* Copy the line to newly allocated memory.  get_one_sourceline()
17129 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
17130 	 * is an extra alloc/free. */
17131 	p = vim_strsave(theline);
17132 	if (p != NULL)
17133 	{
17134 	    vim_free(theline);
17135 	    theline = p;
17136 	}
17137 
17138 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
17139 	newlines.ga_len++;
17140     }
17141 
17142     /* Don't define the function when skipping commands or when an error was
17143      * detected. */
17144     if (eap->skip || did_emsg)
17145 	goto erret;
17146 
17147     /*
17148      * If there are no errors, add the function
17149      */
17150     if (fudi.fd_dict == NULL)
17151     {
17152 	v = find_var(name, &ht);
17153 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
17154 	{
17155 	    emsg_funcname("E707: Function name conflicts with variable: %s",
17156 									name);
17157 	    goto erret;
17158 	}
17159 
17160 	fp = find_func(name);
17161 	if (fp != NULL)
17162 	{
17163 	    if (!eap->forceit)
17164 	    {
17165 		emsg_funcname(e_funcexts, name);
17166 		goto erret;
17167 	    }
17168 	    if (fp->uf_calls > 0)
17169 	    {
17170 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
17171 									name);
17172 		goto erret;
17173 	    }
17174 	    /* redefine existing function */
17175 	    ga_clear_strings(&(fp->uf_args));
17176 	    ga_clear_strings(&(fp->uf_lines));
17177 	    vim_free(name);
17178 	    name = NULL;
17179 	}
17180     }
17181     else
17182     {
17183 	char	numbuf[20];
17184 
17185 	fp = NULL;
17186 	if (fudi.fd_newkey == NULL && !eap->forceit)
17187 	{
17188 	    EMSG(_(e_funcdict));
17189 	    goto erret;
17190 	}
17191 	if (fudi.fd_di == NULL)
17192 	{
17193 	    /* Can't add a function to a locked dictionary */
17194 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17195 		goto erret;
17196 	}
17197 	    /* Can't change an existing function if it is locked */
17198 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17199 	    goto erret;
17200 
17201 	/* Give the function a sequential number.  Can only be used with a
17202 	 * Funcref! */
17203 	vim_free(name);
17204 	sprintf(numbuf, "%d", ++func_nr);
17205 	name = vim_strsave((char_u *)numbuf);
17206 	if (name == NULL)
17207 	    goto erret;
17208     }
17209 
17210     if (fp == NULL)
17211     {
17212 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17213 	{
17214 	    int	    slen, plen;
17215 	    char_u  *scriptname;
17216 
17217 	    /* Check that the autoload name matches the script name. */
17218 	    j = FAIL;
17219 	    if (sourcing_name != NULL)
17220 	    {
17221 		scriptname = autoload_name(name);
17222 		if (scriptname != NULL)
17223 		{
17224 		    p = vim_strchr(scriptname, '/');
17225 		    plen = STRLEN(p);
17226 		    slen = STRLEN(sourcing_name);
17227 		    if (slen > plen && fnamecmp(p,
17228 					    sourcing_name + slen - plen) == 0)
17229 			j = OK;
17230 		    vim_free(scriptname);
17231 		}
17232 	    }
17233 	    if (j == FAIL)
17234 	    {
17235 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17236 		goto erret;
17237 	    }
17238 	}
17239 
17240 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17241 	if (fp == NULL)
17242 	    goto erret;
17243 
17244 	if (fudi.fd_dict != NULL)
17245 	{
17246 	    if (fudi.fd_di == NULL)
17247 	    {
17248 		/* add new dict entry */
17249 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17250 		if (fudi.fd_di == NULL)
17251 		{
17252 		    vim_free(fp);
17253 		    goto erret;
17254 		}
17255 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17256 		{
17257 		    vim_free(fudi.fd_di);
17258 		    goto erret;
17259 		}
17260 	    }
17261 	    else
17262 		/* overwrite existing dict entry */
17263 		clear_tv(&fudi.fd_di->di_tv);
17264 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17265 	    fudi.fd_di->di_tv.v_lock = 0;
17266 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17267 	    fp->uf_refcount = 1;
17268 	}
17269 
17270 	/* insert the new function in the function list */
17271 	STRCPY(fp->uf_name, name);
17272 	hash_add(&func_hashtab, UF2HIKEY(fp));
17273     }
17274     fp->uf_args = newargs;
17275     fp->uf_lines = newlines;
17276 #ifdef FEAT_PROFILE
17277     fp->uf_tml_count = NULL;
17278     fp->uf_tml_total = NULL;
17279     fp->uf_tml_self = NULL;
17280     fp->uf_profiling = FALSE;
17281     if (prof_def_func())
17282 	func_do_profile(fp);
17283 #endif
17284     fp->uf_varargs = varargs;
17285     fp->uf_flags = flags;
17286     fp->uf_calls = 0;
17287     fp->uf_script_ID = current_SID;
17288     goto ret_free;
17289 
17290 erret:
17291     ga_clear_strings(&newargs);
17292     ga_clear_strings(&newlines);
17293 ret_free:
17294     vim_free(skip_until);
17295     vim_free(fudi.fd_newkey);
17296     vim_free(name);
17297     did_emsg |= saved_did_emsg;
17298 }
17299 
17300 /*
17301  * Get a function name, translating "<SID>" and "<SNR>".
17302  * Also handles a Funcref in a List or Dictionary.
17303  * Returns the function name in allocated memory, or NULL for failure.
17304  * flags:
17305  * TFN_INT:   internal function name OK
17306  * TFN_QUIET: be quiet
17307  * Advances "pp" to just after the function name (if no error).
17308  */
17309     static char_u *
17310 trans_function_name(pp, skip, flags, fdp)
17311     char_u	**pp;
17312     int		skip;		/* only find the end, don't evaluate */
17313     int		flags;
17314     funcdict_T	*fdp;		/* return: info about dictionary used */
17315 {
17316     char_u	*name = NULL;
17317     char_u	*start;
17318     char_u	*end;
17319     int		lead;
17320     char_u	sid_buf[20];
17321     int		len;
17322     lval_T	lv;
17323 
17324     if (fdp != NULL)
17325 	vim_memset(fdp, 0, sizeof(funcdict_T));
17326     start = *pp;
17327 
17328     /* Check for hard coded <SNR>: already translated function ID (from a user
17329      * command). */
17330     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17331 						   && (*pp)[2] == (int)KE_SNR)
17332     {
17333 	*pp += 3;
17334 	len = get_id_len(pp) + 3;
17335 	return vim_strnsave(start, len);
17336     }
17337 
17338     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17339      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17340     lead = eval_fname_script(start);
17341     if (lead > 2)
17342 	start += lead;
17343 
17344     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17345 					      lead > 2 ? 0 : FNE_CHECK_START);
17346     if (end == start)
17347     {
17348 	if (!skip)
17349 	    EMSG(_("E129: Function name required"));
17350 	goto theend;
17351     }
17352     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17353     {
17354 	/*
17355 	 * Report an invalid expression in braces, unless the expression
17356 	 * evaluation has been cancelled due to an aborting error, an
17357 	 * interrupt, or an exception.
17358 	 */
17359 	if (!aborting())
17360 	{
17361 	    if (end != NULL)
17362 		EMSG2(_(e_invarg2), start);
17363 	}
17364 	else
17365 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17366 	goto theend;
17367     }
17368 
17369     if (lv.ll_tv != NULL)
17370     {
17371 	if (fdp != NULL)
17372 	{
17373 	    fdp->fd_dict = lv.ll_dict;
17374 	    fdp->fd_newkey = lv.ll_newkey;
17375 	    lv.ll_newkey = NULL;
17376 	    fdp->fd_di = lv.ll_di;
17377 	}
17378 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17379 	{
17380 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17381 	    *pp = end;
17382 	}
17383 	else
17384 	{
17385 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17386 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17387 		EMSG(_(e_funcref));
17388 	    else
17389 		*pp = end;
17390 	    name = NULL;
17391 	}
17392 	goto theend;
17393     }
17394 
17395     if (lv.ll_name == NULL)
17396     {
17397 	/* Error found, but continue after the function name. */
17398 	*pp = end;
17399 	goto theend;
17400     }
17401 
17402     if (lv.ll_exp_name != NULL)
17403 	len = STRLEN(lv.ll_exp_name);
17404     else
17405     {
17406 	if (lead == 2)	/* skip over "s:" */
17407 	    lv.ll_name += 2;
17408 	len = (int)(end - lv.ll_name);
17409     }
17410 
17411     /*
17412      * Copy the function name to allocated memory.
17413      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17414      * Accept <SNR>123_name() outside a script.
17415      */
17416     if (skip)
17417 	lead = 0;	/* do nothing */
17418     else if (lead > 0)
17419     {
17420 	lead = 3;
17421 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17422 	{
17423 	    if (current_SID <= 0)
17424 	    {
17425 		EMSG(_(e_usingsid));
17426 		goto theend;
17427 	    }
17428 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17429 	    lead += (int)STRLEN(sid_buf);
17430 	}
17431     }
17432     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17433     {
17434 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17435 	goto theend;
17436     }
17437     name = alloc((unsigned)(len + lead + 1));
17438     if (name != NULL)
17439     {
17440 	if (lead > 0)
17441 	{
17442 	    name[0] = K_SPECIAL;
17443 	    name[1] = KS_EXTRA;
17444 	    name[2] = (int)KE_SNR;
17445 	    if (lead > 3)	/* If it's "<SID>" */
17446 		STRCPY(name + 3, sid_buf);
17447 	}
17448 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17449 	name[len + lead] = NUL;
17450     }
17451     *pp = end;
17452 
17453 theend:
17454     clear_lval(&lv);
17455     return name;
17456 }
17457 
17458 /*
17459  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17460  * Return 2 if "p" starts with "s:".
17461  * Return 0 otherwise.
17462  */
17463     static int
17464 eval_fname_script(p)
17465     char_u	*p;
17466 {
17467     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17468 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17469 	return 5;
17470     if (p[0] == 's' && p[1] == ':')
17471 	return 2;
17472     return 0;
17473 }
17474 
17475 /*
17476  * Return TRUE if "p" starts with "<SID>" or "s:".
17477  * Only works if eval_fname_script() returned non-zero for "p"!
17478  */
17479     static int
17480 eval_fname_sid(p)
17481     char_u	*p;
17482 {
17483     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17484 }
17485 
17486 /*
17487  * List the head of the function: "name(arg1, arg2)".
17488  */
17489     static void
17490 list_func_head(fp, indent)
17491     ufunc_T	*fp;
17492     int		indent;
17493 {
17494     int		j;
17495 
17496     msg_start();
17497     if (indent)
17498 	MSG_PUTS("   ");
17499     MSG_PUTS("function ");
17500     if (fp->uf_name[0] == K_SPECIAL)
17501     {
17502 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17503 	msg_puts(fp->uf_name + 3);
17504     }
17505     else
17506 	msg_puts(fp->uf_name);
17507     msg_putchar('(');
17508     for (j = 0; j < fp->uf_args.ga_len; ++j)
17509     {
17510 	if (j)
17511 	    MSG_PUTS(", ");
17512 	msg_puts(FUNCARG(fp, j));
17513     }
17514     if (fp->uf_varargs)
17515     {
17516 	if (j)
17517 	    MSG_PUTS(", ");
17518 	MSG_PUTS("...");
17519     }
17520     msg_putchar(')');
17521 #ifdef FEAT_EVAL
17522     if (p_verbose > 0)
17523 	last_set_msg(fp->uf_script_ID);
17524 #endif
17525 }
17526 
17527 /*
17528  * Find a function by name, return pointer to it in ufuncs.
17529  * Return NULL for unknown function.
17530  */
17531     static ufunc_T *
17532 find_func(name)
17533     char_u	*name;
17534 {
17535     hashitem_T	*hi;
17536 
17537     hi = hash_find(&func_hashtab, name);
17538     if (!HASHITEM_EMPTY(hi))
17539 	return HI2UF(hi);
17540     return NULL;
17541 }
17542 
17543 #if defined(EXITFREE) || defined(PROTO)
17544     void
17545 free_all_functions()
17546 {
17547     hashitem_T	*hi;
17548 
17549     /* Need to start all over every time, because func_free() may change the
17550      * hash table. */
17551     while (func_hashtab.ht_used > 0)
17552 	for (hi = func_hashtab.ht_array; ; ++hi)
17553 	    if (!HASHITEM_EMPTY(hi))
17554 	    {
17555 		func_free(HI2UF(hi));
17556 		break;
17557 	    }
17558 }
17559 #endif
17560 
17561 /*
17562  * Return TRUE if a function "name" exists.
17563  */
17564     static int
17565 function_exists(name)
17566     char_u *name;
17567 {
17568     char_u  *p = name;
17569     int	    n = FALSE;
17570 
17571     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17572     if (p != NULL)
17573     {
17574 	if (builtin_function(p))
17575 	    n = (find_internal_func(p) >= 0);
17576 	else
17577 	    n = (find_func(p) != NULL);
17578 	vim_free(p);
17579     }
17580     return n;
17581 }
17582 
17583 /*
17584  * Return TRUE if "name" looks like a builtin function name: starts with a
17585  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17586  */
17587     static int
17588 builtin_function(name)
17589     char_u *name;
17590 {
17591     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17592 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17593 }
17594 
17595 #if defined(FEAT_PROFILE) || defined(PROTO)
17596 /*
17597  * Start profiling function "fp".
17598  */
17599     static void
17600 func_do_profile(fp)
17601     ufunc_T	*fp;
17602 {
17603     fp->uf_tm_count = 0;
17604     profile_zero(&fp->uf_tm_self);
17605     profile_zero(&fp->uf_tm_total);
17606     if (fp->uf_tml_count == NULL)
17607 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17608 					 (sizeof(int) * fp->uf_lines.ga_len));
17609     if (fp->uf_tml_total == NULL)
17610 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17611 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17612     if (fp->uf_tml_self == NULL)
17613 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17614 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17615     fp->uf_tml_idx = -1;
17616     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17617 						   || fp->uf_tml_self == NULL)
17618 	return;	    /* out of memory */
17619 
17620     fp->uf_profiling = TRUE;
17621 }
17622 
17623 /*
17624  * Dump the profiling results for all functions in file "fd".
17625  */
17626     void
17627 func_dump_profile(fd)
17628     FILE    *fd;
17629 {
17630     hashitem_T	*hi;
17631     int		todo;
17632     ufunc_T	*fp;
17633     int		i;
17634     ufunc_T	**sorttab;
17635     int		st_len = 0;
17636 
17637     todo = func_hashtab.ht_used;
17638     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17639 
17640     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17641     {
17642 	if (!HASHITEM_EMPTY(hi))
17643 	{
17644 	    --todo;
17645 	    fp = HI2UF(hi);
17646 	    if (fp->uf_profiling)
17647 	    {
17648 		if (sorttab != NULL)
17649 		    sorttab[st_len++] = fp;
17650 
17651 		if (fp->uf_name[0] == K_SPECIAL)
17652 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17653 		else
17654 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17655 		if (fp->uf_tm_count == 1)
17656 		    fprintf(fd, "Called 1 time\n");
17657 		else
17658 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17659 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17660 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17661 		fprintf(fd, "\n");
17662 		fprintf(fd, "count  total (s)   self (s)\n");
17663 
17664 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17665 		{
17666 		    prof_func_line(fd, fp->uf_tml_count[i],
17667 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17668 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17669 		}
17670 		fprintf(fd, "\n");
17671 	    }
17672 	}
17673     }
17674 
17675     if (sorttab != NULL && st_len > 0)
17676     {
17677 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17678 							      prof_total_cmp);
17679 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17680 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17681 							      prof_self_cmp);
17682 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17683     }
17684 }
17685 
17686     static void
17687 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17688     FILE	*fd;
17689     ufunc_T	**sorttab;
17690     int		st_len;
17691     char	*title;
17692     int		prefer_self;	/* when equal print only self time */
17693 {
17694     int		i;
17695     ufunc_T	*fp;
17696 
17697     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17698     fprintf(fd, "count  total (s)   self (s)  function\n");
17699     for (i = 0; i < 20 && i < st_len; ++i)
17700     {
17701 	fp = sorttab[i];
17702 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17703 								 prefer_self);
17704 	if (fp->uf_name[0] == K_SPECIAL)
17705 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17706 	else
17707 	    fprintf(fd, " %s()\n", fp->uf_name);
17708     }
17709     fprintf(fd, "\n");
17710 }
17711 
17712 /*
17713  * Print the count and times for one function or function line.
17714  */
17715     static void
17716 prof_func_line(fd, count, total, self, prefer_self)
17717     FILE	*fd;
17718     int		count;
17719     proftime_T	*total;
17720     proftime_T	*self;
17721     int		prefer_self;	/* when equal print only self time */
17722 {
17723     if (count > 0)
17724     {
17725 	fprintf(fd, "%5d ", count);
17726 	if (prefer_self && profile_equal(total, self))
17727 	    fprintf(fd, "           ");
17728 	else
17729 	    fprintf(fd, "%s ", profile_msg(total));
17730 	if (!prefer_self && profile_equal(total, self))
17731 	    fprintf(fd, "           ");
17732 	else
17733 	    fprintf(fd, "%s ", profile_msg(self));
17734     }
17735     else
17736 	fprintf(fd, "                            ");
17737 }
17738 
17739 /*
17740  * Compare function for total time sorting.
17741  */
17742     static int
17743 #ifdef __BORLANDC__
17744 _RTLENTRYF
17745 #endif
17746 prof_total_cmp(s1, s2)
17747     const void	*s1;
17748     const void	*s2;
17749 {
17750     ufunc_T	*p1, *p2;
17751 
17752     p1 = *(ufunc_T **)s1;
17753     p2 = *(ufunc_T **)s2;
17754     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17755 }
17756 
17757 /*
17758  * Compare function for self time sorting.
17759  */
17760     static int
17761 #ifdef __BORLANDC__
17762 _RTLENTRYF
17763 #endif
17764 prof_self_cmp(s1, s2)
17765     const void	*s1;
17766     const void	*s2;
17767 {
17768     ufunc_T	*p1, *p2;
17769 
17770     p1 = *(ufunc_T **)s1;
17771     p2 = *(ufunc_T **)s2;
17772     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17773 }
17774 
17775 #endif
17776 
17777 /* The names of packages that once were loaded is remembered. */
17778 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17779 
17780 /*
17781  * If "name" has a package name try autoloading the script for it.
17782  * Return TRUE if a package was loaded.
17783  */
17784     static int
17785 script_autoload(name, reload)
17786     char_u	*name;
17787     int		reload;	    /* load script again when already loaded */
17788 {
17789     char_u	*p;
17790     char_u	*scriptname, *tofree;
17791     int		ret = FALSE;
17792     int		i;
17793 
17794     /* If there is no '#' after name[0] there is no package name. */
17795     p = vim_strchr(name, AUTOLOAD_CHAR);
17796     if (p == NULL || p == name)
17797 	return FALSE;
17798 
17799     tofree = scriptname = autoload_name(name);
17800 
17801     /* Find the name in the list of previously loaded package names.  Skip
17802      * "autoload/", it's always the same. */
17803     for (i = 0; i < ga_loaded.ga_len; ++i)
17804 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
17805 	    break;
17806     if (!reload && i < ga_loaded.ga_len)
17807 	ret = FALSE;	    /* was loaded already */
17808     else
17809     {
17810 	/* Remember the name if it wasn't loaded already. */
17811 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
17812 	{
17813 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
17814 	    tofree = NULL;
17815 	}
17816 
17817 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
17818 	if (source_runtime(scriptname, FALSE) == OK)
17819 	    ret = TRUE;
17820     }
17821 
17822     vim_free(tofree);
17823     return ret;
17824 }
17825 
17826 /*
17827  * Return the autoload script name for a function or variable name.
17828  * Returns NULL when out of memory.
17829  */
17830     static char_u *
17831 autoload_name(name)
17832     char_u	*name;
17833 {
17834     char_u	*p;
17835     char_u	*scriptname;
17836 
17837     /* Get the script file name: replace '#' with '/', append ".vim". */
17838     scriptname = alloc((unsigned)(STRLEN(name) + 14));
17839     if (scriptname == NULL)
17840 	return FALSE;
17841     STRCPY(scriptname, "autoload/");
17842     STRCAT(scriptname, name);
17843     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
17844     STRCAT(scriptname, ".vim");
17845     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
17846 	*p = '/';
17847     return scriptname;
17848 }
17849 
17850 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
17851 
17852 /*
17853  * Function given to ExpandGeneric() to obtain the list of user defined
17854  * function names.
17855  */
17856     char_u *
17857 get_user_func_name(xp, idx)
17858     expand_T	*xp;
17859     int		idx;
17860 {
17861     static long_u	done;
17862     static hashitem_T	*hi;
17863     ufunc_T		*fp;
17864 
17865     if (idx == 0)
17866     {
17867 	done = 0;
17868 	hi = func_hashtab.ht_array;
17869     }
17870     if (done < func_hashtab.ht_used)
17871     {
17872 	if (done++ > 0)
17873 	    ++hi;
17874 	while (HASHITEM_EMPTY(hi))
17875 	    ++hi;
17876 	fp = HI2UF(hi);
17877 
17878 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
17879 	    return fp->uf_name;	/* prevents overflow */
17880 
17881 	cat_func_name(IObuff, fp);
17882 	if (xp->xp_context != EXPAND_USER_FUNC)
17883 	{
17884 	    STRCAT(IObuff, "(");
17885 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
17886 		STRCAT(IObuff, ")");
17887 	}
17888 	return IObuff;
17889     }
17890     return NULL;
17891 }
17892 
17893 #endif /* FEAT_CMDL_COMPL */
17894 
17895 /*
17896  * Copy the function name of "fp" to buffer "buf".
17897  * "buf" must be able to hold the function name plus three bytes.
17898  * Takes care of script-local function names.
17899  */
17900     static void
17901 cat_func_name(buf, fp)
17902     char_u	*buf;
17903     ufunc_T	*fp;
17904 {
17905     if (fp->uf_name[0] == K_SPECIAL)
17906     {
17907 	STRCPY(buf, "<SNR>");
17908 	STRCAT(buf, fp->uf_name + 3);
17909     }
17910     else
17911 	STRCPY(buf, fp->uf_name);
17912 }
17913 
17914 /*
17915  * ":delfunction {name}"
17916  */
17917     void
17918 ex_delfunction(eap)
17919     exarg_T	*eap;
17920 {
17921     ufunc_T	*fp = NULL;
17922     char_u	*p;
17923     char_u	*name;
17924     funcdict_T	fudi;
17925 
17926     p = eap->arg;
17927     name = trans_function_name(&p, eap->skip, 0, &fudi);
17928     vim_free(fudi.fd_newkey);
17929     if (name == NULL)
17930     {
17931 	if (fudi.fd_dict != NULL && !eap->skip)
17932 	    EMSG(_(e_funcref));
17933 	return;
17934     }
17935     if (!ends_excmd(*skipwhite(p)))
17936     {
17937 	vim_free(name);
17938 	EMSG(_(e_trailing));
17939 	return;
17940     }
17941     eap->nextcmd = check_nextcmd(p);
17942     if (eap->nextcmd != NULL)
17943 	*p = NUL;
17944 
17945     if (!eap->skip)
17946 	fp = find_func(name);
17947     vim_free(name);
17948 
17949     if (!eap->skip)
17950     {
17951 	if (fp == NULL)
17952 	{
17953 	    EMSG2(_(e_nofunc), eap->arg);
17954 	    return;
17955 	}
17956 	if (fp->uf_calls > 0)
17957 	{
17958 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
17959 	    return;
17960 	}
17961 
17962 	if (fudi.fd_dict != NULL)
17963 	{
17964 	    /* Delete the dict item that refers to the function, it will
17965 	     * invoke func_unref() and possibly delete the function. */
17966 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
17967 	}
17968 	else
17969 	    func_free(fp);
17970     }
17971 }
17972 
17973 /*
17974  * Free a function and remove it from the list of functions.
17975  */
17976     static void
17977 func_free(fp)
17978     ufunc_T *fp;
17979 {
17980     hashitem_T	*hi;
17981 
17982     /* clear this function */
17983     ga_clear_strings(&(fp->uf_args));
17984     ga_clear_strings(&(fp->uf_lines));
17985 #ifdef FEAT_PROFILE
17986     vim_free(fp->uf_tml_count);
17987     vim_free(fp->uf_tml_total);
17988     vim_free(fp->uf_tml_self);
17989 #endif
17990 
17991     /* remove the function from the function hashtable */
17992     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
17993     if (HASHITEM_EMPTY(hi))
17994 	EMSG2(_(e_intern2), "func_free()");
17995     else
17996 	hash_remove(&func_hashtab, hi);
17997 
17998     vim_free(fp);
17999 }
18000 
18001 /*
18002  * Unreference a Function: decrement the reference count and free it when it
18003  * becomes zero.  Only for numbered functions.
18004  */
18005     static void
18006 func_unref(name)
18007     char_u	*name;
18008 {
18009     ufunc_T *fp;
18010 
18011     if (name != NULL && isdigit(*name))
18012     {
18013 	fp = find_func(name);
18014 	if (fp == NULL)
18015 	    EMSG2(_(e_intern2), "func_unref()");
18016 	else if (--fp->uf_refcount <= 0)
18017 	{
18018 	    /* Only delete it when it's not being used.  Otherwise it's done
18019 	     * when "uf_calls" becomes zero. */
18020 	    if (fp->uf_calls == 0)
18021 		func_free(fp);
18022 	}
18023     }
18024 }
18025 
18026 /*
18027  * Count a reference to a Function.
18028  */
18029     static void
18030 func_ref(name)
18031     char_u	*name;
18032 {
18033     ufunc_T *fp;
18034 
18035     if (name != NULL && isdigit(*name))
18036     {
18037 	fp = find_func(name);
18038 	if (fp == NULL)
18039 	    EMSG2(_(e_intern2), "func_ref()");
18040 	else
18041 	    ++fp->uf_refcount;
18042     }
18043 }
18044 
18045 /*
18046  * Call a user function.
18047  */
18048     static void
18049 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
18050     ufunc_T	*fp;		/* pointer to function */
18051     int		argcount;	/* nr of args */
18052     typval_T	*argvars;	/* arguments */
18053     typval_T	*rettv;		/* return value */
18054     linenr_T	firstline;	/* first line of range */
18055     linenr_T	lastline;	/* last line of range */
18056     dict_T	*selfdict;	/* Dictionary for "self" */
18057 {
18058     char_u	*save_sourcing_name;
18059     linenr_T	save_sourcing_lnum;
18060     scid_T	save_current_SID;
18061     funccall_T	fc;
18062     int		save_did_emsg;
18063     static int	depth = 0;
18064     dictitem_T	*v;
18065     int		fixvar_idx = 0;	/* index in fixvar[] */
18066     int		i;
18067     int		ai;
18068     char_u	numbuf[NUMBUFLEN];
18069     char_u	*name;
18070 #ifdef FEAT_PROFILE
18071     proftime_T	wait_start;
18072 #endif
18073 
18074     /* If depth of calling is getting too high, don't execute the function */
18075     if (depth >= p_mfd)
18076     {
18077 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
18078 	rettv->v_type = VAR_NUMBER;
18079 	rettv->vval.v_number = -1;
18080 	return;
18081     }
18082     ++depth;
18083 
18084     line_breakcheck();		/* check for CTRL-C hit */
18085 
18086     fc.caller = current_funccal;
18087     current_funccal = &fc;
18088     fc.func = fp;
18089     fc.rettv = rettv;
18090     rettv->vval.v_number = 0;
18091     fc.linenr = 0;
18092     fc.returned = FALSE;
18093     fc.level = ex_nesting_level;
18094     /* Check if this function has a breakpoint. */
18095     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
18096     fc.dbg_tick = debug_tick;
18097 
18098     /*
18099      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
18100      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
18101      * each argument variable and saves a lot of time.
18102      */
18103     /*
18104      * Init l: variables.
18105      */
18106     init_var_dict(&fc.l_vars, &fc.l_vars_var);
18107     if (selfdict != NULL)
18108     {
18109 	/* Set l:self to "selfdict". */
18110 	v = &fc.fixvar[fixvar_idx++].var;
18111 	STRCPY(v->di_key, "self");
18112 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
18113 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
18114 	v->di_tv.v_type = VAR_DICT;
18115 	v->di_tv.v_lock = 0;
18116 	v->di_tv.vval.v_dict = selfdict;
18117 	++selfdict->dv_refcount;
18118     }
18119 
18120     /*
18121      * Init a: variables.
18122      * Set a:0 to "argcount".
18123      * Set a:000 to a list with room for the "..." arguments.
18124      */
18125     init_var_dict(&fc.l_avars, &fc.l_avars_var);
18126     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
18127 				(varnumber_T)(argcount - fp->uf_args.ga_len));
18128     v = &fc.fixvar[fixvar_idx++].var;
18129     STRCPY(v->di_key, "000");
18130     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18131     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18132     v->di_tv.v_type = VAR_LIST;
18133     v->di_tv.v_lock = VAR_FIXED;
18134     v->di_tv.vval.v_list = &fc.l_varlist;
18135     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
18136     fc.l_varlist.lv_refcount = 99999;
18137 
18138     /*
18139      * Set a:firstline to "firstline" and a:lastline to "lastline".
18140      * Set a:name to named arguments.
18141      * Set a:N to the "..." arguments.
18142      */
18143     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
18144 						      (varnumber_T)firstline);
18145     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
18146 						       (varnumber_T)lastline);
18147     for (i = 0; i < argcount; ++i)
18148     {
18149 	ai = i - fp->uf_args.ga_len;
18150 	if (ai < 0)
18151 	    /* named argument a:name */
18152 	    name = FUNCARG(fp, i);
18153 	else
18154 	{
18155 	    /* "..." argument a:1, a:2, etc. */
18156 	    sprintf((char *)numbuf, "%d", ai + 1);
18157 	    name = numbuf;
18158 	}
18159 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
18160 	{
18161 	    v = &fc.fixvar[fixvar_idx++].var;
18162 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18163 	}
18164 	else
18165 	{
18166 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
18167 							     + STRLEN(name)));
18168 	    if (v == NULL)
18169 		break;
18170 	    v->di_flags = DI_FLAGS_RO;
18171 	}
18172 	STRCPY(v->di_key, name);
18173 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18174 
18175 	/* Note: the values are copied directly to avoid alloc/free.
18176 	 * "argvars" must have VAR_FIXED for v_lock. */
18177 	v->di_tv = argvars[i];
18178 	v->di_tv.v_lock = VAR_FIXED;
18179 
18180 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
18181 	{
18182 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18183 	    fc.l_listitems[ai].li_tv = argvars[i];
18184 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18185 	}
18186     }
18187 
18188     /* Don't redraw while executing the function. */
18189     ++RedrawingDisabled;
18190     save_sourcing_name = sourcing_name;
18191     save_sourcing_lnum = sourcing_lnum;
18192     sourcing_lnum = 1;
18193     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18194 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18195     if (sourcing_name != NULL)
18196     {
18197 	if (save_sourcing_name != NULL
18198 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18199 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18200 	else
18201 	    STRCPY(sourcing_name, "function ");
18202 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18203 
18204 	if (p_verbose >= 12)
18205 	{
18206 	    ++no_wait_return;
18207 	    verbose_enter_scroll();
18208 
18209 	    smsg((char_u *)_("calling %s"), sourcing_name);
18210 	    if (p_verbose >= 14)
18211 	    {
18212 		char_u	buf[MSG_BUF_LEN];
18213 		char_u	numbuf[NUMBUFLEN];
18214 		char_u	*tofree;
18215 
18216 		msg_puts((char_u *)"(");
18217 		for (i = 0; i < argcount; ++i)
18218 		{
18219 		    if (i > 0)
18220 			msg_puts((char_u *)", ");
18221 		    if (argvars[i].v_type == VAR_NUMBER)
18222 			msg_outnum((long)argvars[i].vval.v_number);
18223 		    else
18224 		    {
18225 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18226 							    buf, MSG_BUF_CLEN);
18227 			msg_puts(buf);
18228 			vim_free(tofree);
18229 		    }
18230 		}
18231 		msg_puts((char_u *)")");
18232 	    }
18233 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18234 
18235 	    verbose_leave_scroll();
18236 	    --no_wait_return;
18237 	}
18238     }
18239 #ifdef FEAT_PROFILE
18240     if (do_profiling)
18241     {
18242 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18243 	    func_do_profile(fp);
18244 	if (fp->uf_profiling
18245 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18246 	{
18247 	    ++fp->uf_tm_count;
18248 	    profile_start(&fp->uf_tm_start);
18249 	    profile_zero(&fp->uf_tm_children);
18250 	}
18251 	script_prof_save(&wait_start);
18252     }
18253 #endif
18254 
18255     save_current_SID = current_SID;
18256     current_SID = fp->uf_script_ID;
18257     save_did_emsg = did_emsg;
18258     did_emsg = FALSE;
18259 
18260     /* call do_cmdline() to execute the lines */
18261     do_cmdline(NULL, get_func_line, (void *)&fc,
18262 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18263 
18264     --RedrawingDisabled;
18265 
18266     /* when the function was aborted because of an error, return -1 */
18267     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18268     {
18269 	clear_tv(rettv);
18270 	rettv->v_type = VAR_NUMBER;
18271 	rettv->vval.v_number = -1;
18272     }
18273 
18274 #ifdef FEAT_PROFILE
18275     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18276     {
18277 	profile_end(&fp->uf_tm_start);
18278 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18279 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18280 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18281 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18282 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18283 	{
18284 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18285 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18286 	}
18287     }
18288 #endif
18289 
18290     /* when being verbose, mention the return value */
18291     if (p_verbose >= 12)
18292     {
18293 	++no_wait_return;
18294 	verbose_enter_scroll();
18295 
18296 	if (aborting())
18297 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18298 	else if (fc.rettv->v_type == VAR_NUMBER)
18299 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18300 					       (long)fc.rettv->vval.v_number);
18301 	else
18302 	{
18303 	    char_u	buf[MSG_BUF_LEN];
18304 	    char_u	numbuf[NUMBUFLEN];
18305 	    char_u	*tofree;
18306 
18307 	    /* The value may be very long.  Skip the middle part, so that we
18308 	     * have some idea how it starts and ends. smsg() would always
18309 	     * truncate it at the end. */
18310 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18311 							   buf, MSG_BUF_CLEN);
18312 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18313 	    vim_free(tofree);
18314 	}
18315 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18316 
18317 	verbose_leave_scroll();
18318 	--no_wait_return;
18319     }
18320 
18321     vim_free(sourcing_name);
18322     sourcing_name = save_sourcing_name;
18323     sourcing_lnum = save_sourcing_lnum;
18324     current_SID = save_current_SID;
18325 #ifdef FEAT_PROFILE
18326     if (do_profiling)
18327 	script_prof_restore(&wait_start);
18328 #endif
18329 
18330     if (p_verbose >= 12 && sourcing_name != NULL)
18331     {
18332 	++no_wait_return;
18333 	verbose_enter_scroll();
18334 
18335 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18336 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18337 
18338 	verbose_leave_scroll();
18339 	--no_wait_return;
18340     }
18341 
18342     did_emsg |= save_did_emsg;
18343     current_funccal = fc.caller;
18344 
18345     /* The a: variables typevals were not alloced, only free the allocated
18346      * variables. */
18347     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18348 
18349     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18350     --depth;
18351 }
18352 
18353 /*
18354  * Add a number variable "name" to dict "dp" with value "nr".
18355  */
18356     static void
18357 add_nr_var(dp, v, name, nr)
18358     dict_T	*dp;
18359     dictitem_T	*v;
18360     char	*name;
18361     varnumber_T nr;
18362 {
18363     STRCPY(v->di_key, name);
18364     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18365     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18366     v->di_tv.v_type = VAR_NUMBER;
18367     v->di_tv.v_lock = VAR_FIXED;
18368     v->di_tv.vval.v_number = nr;
18369 }
18370 
18371 /*
18372  * ":return [expr]"
18373  */
18374     void
18375 ex_return(eap)
18376     exarg_T	*eap;
18377 {
18378     char_u	*arg = eap->arg;
18379     typval_T	rettv;
18380     int		returning = FALSE;
18381 
18382     if (current_funccal == NULL)
18383     {
18384 	EMSG(_("E133: :return not inside a function"));
18385 	return;
18386     }
18387 
18388     if (eap->skip)
18389 	++emsg_skip;
18390 
18391     eap->nextcmd = NULL;
18392     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18393 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18394     {
18395 	if (!eap->skip)
18396 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18397 	else
18398 	    clear_tv(&rettv);
18399     }
18400     /* It's safer to return also on error. */
18401     else if (!eap->skip)
18402     {
18403 	/*
18404 	 * Return unless the expression evaluation has been cancelled due to an
18405 	 * aborting error, an interrupt, or an exception.
18406 	 */
18407 	if (!aborting())
18408 	    returning = do_return(eap, FALSE, TRUE, NULL);
18409     }
18410 
18411     /* When skipping or the return gets pending, advance to the next command
18412      * in this line (!returning).  Otherwise, ignore the rest of the line.
18413      * Following lines will be ignored by get_func_line(). */
18414     if (returning)
18415 	eap->nextcmd = NULL;
18416     else if (eap->nextcmd == NULL)	    /* no argument */
18417 	eap->nextcmd = check_nextcmd(arg);
18418 
18419     if (eap->skip)
18420 	--emsg_skip;
18421 }
18422 
18423 /*
18424  * Return from a function.  Possibly makes the return pending.  Also called
18425  * for a pending return at the ":endtry" or after returning from an extra
18426  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18427  * when called due to a ":return" command.  "rettv" may point to a typval_T
18428  * with the return rettv.  Returns TRUE when the return can be carried out,
18429  * FALSE when the return gets pending.
18430  */
18431     int
18432 do_return(eap, reanimate, is_cmd, rettv)
18433     exarg_T	*eap;
18434     int		reanimate;
18435     int		is_cmd;
18436     void	*rettv;
18437 {
18438     int		idx;
18439     struct condstack *cstack = eap->cstack;
18440 
18441     if (reanimate)
18442 	/* Undo the return. */
18443 	current_funccal->returned = FALSE;
18444 
18445     /*
18446      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18447      * not in its finally clause (which then is to be executed next) is found.
18448      * In this case, make the ":return" pending for execution at the ":endtry".
18449      * Otherwise, return normally.
18450      */
18451     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18452     if (idx >= 0)
18453     {
18454 	cstack->cs_pending[idx] = CSTP_RETURN;
18455 
18456 	if (!is_cmd && !reanimate)
18457 	    /* A pending return again gets pending.  "rettv" points to an
18458 	     * allocated variable with the rettv of the original ":return"'s
18459 	     * argument if present or is NULL else. */
18460 	    cstack->cs_rettv[idx] = rettv;
18461 	else
18462 	{
18463 	    /* When undoing a return in order to make it pending, get the stored
18464 	     * return rettv. */
18465 	    if (reanimate)
18466 		rettv = current_funccal->rettv;
18467 
18468 	    if (rettv != NULL)
18469 	    {
18470 		/* Store the value of the pending return. */
18471 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18472 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18473 		else
18474 		    EMSG(_(e_outofmem));
18475 	    }
18476 	    else
18477 		cstack->cs_rettv[idx] = NULL;
18478 
18479 	    if (reanimate)
18480 	    {
18481 		/* The pending return value could be overwritten by a ":return"
18482 		 * without argument in a finally clause; reset the default
18483 		 * return value. */
18484 		current_funccal->rettv->v_type = VAR_NUMBER;
18485 		current_funccal->rettv->vval.v_number = 0;
18486 	    }
18487 	}
18488 	report_make_pending(CSTP_RETURN, rettv);
18489     }
18490     else
18491     {
18492 	current_funccal->returned = TRUE;
18493 
18494 	/* If the return is carried out now, store the return value.  For
18495 	 * a return immediately after reanimation, the value is already
18496 	 * there. */
18497 	if (!reanimate && rettv != NULL)
18498 	{
18499 	    clear_tv(current_funccal->rettv);
18500 	    *current_funccal->rettv = *(typval_T *)rettv;
18501 	    if (!is_cmd)
18502 		vim_free(rettv);
18503 	}
18504     }
18505 
18506     return idx < 0;
18507 }
18508 
18509 /*
18510  * Free the variable with a pending return value.
18511  */
18512     void
18513 discard_pending_return(rettv)
18514     void	*rettv;
18515 {
18516     free_tv((typval_T *)rettv);
18517 }
18518 
18519 /*
18520  * Generate a return command for producing the value of "rettv".  The result
18521  * is an allocated string.  Used by report_pending() for verbose messages.
18522  */
18523     char_u *
18524 get_return_cmd(rettv)
18525     void	*rettv;
18526 {
18527     char_u	*s = NULL;
18528     char_u	*tofree = NULL;
18529     char_u	numbuf[NUMBUFLEN];
18530 
18531     if (rettv != NULL)
18532 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18533     if (s == NULL)
18534 	s = (char_u *)"";
18535 
18536     STRCPY(IObuff, ":return ");
18537     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18538     if (STRLEN(s) + 8 >= IOSIZE)
18539 	STRCPY(IObuff + IOSIZE - 4, "...");
18540     vim_free(tofree);
18541     return vim_strsave(IObuff);
18542 }
18543 
18544 /*
18545  * Get next function line.
18546  * Called by do_cmdline() to get the next line.
18547  * Returns allocated string, or NULL for end of function.
18548  */
18549 /* ARGSUSED */
18550     char_u *
18551 get_func_line(c, cookie, indent)
18552     int	    c;		    /* not used */
18553     void    *cookie;
18554     int	    indent;	    /* not used */
18555 {
18556     funccall_T	*fcp = (funccall_T *)cookie;
18557     ufunc_T	*fp = fcp->func;
18558     char_u	*retval;
18559     garray_T	*gap;  /* growarray with function lines */
18560 
18561     /* If breakpoints have been added/deleted need to check for it. */
18562     if (fcp->dbg_tick != debug_tick)
18563     {
18564 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18565 							       sourcing_lnum);
18566 	fcp->dbg_tick = debug_tick;
18567     }
18568 #ifdef FEAT_PROFILE
18569     if (do_profiling)
18570 	func_line_end(cookie);
18571 #endif
18572 
18573     gap = &fp->uf_lines;
18574     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18575 	retval = NULL;
18576     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18577 	retval = NULL;
18578     else
18579     {
18580 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18581 	sourcing_lnum = fcp->linenr;
18582 #ifdef FEAT_PROFILE
18583 	if (do_profiling)
18584 	    func_line_start(cookie);
18585 #endif
18586     }
18587 
18588     /* Did we encounter a breakpoint? */
18589     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18590     {
18591 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18592 	/* Find next breakpoint. */
18593 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18594 							       sourcing_lnum);
18595 	fcp->dbg_tick = debug_tick;
18596     }
18597 
18598     return retval;
18599 }
18600 
18601 #if defined(FEAT_PROFILE) || defined(PROTO)
18602 /*
18603  * Called when starting to read a function line.
18604  * "sourcing_lnum" must be correct!
18605  * When skipping lines it may not actually be executed, but we won't find out
18606  * until later and we need to store the time now.
18607  */
18608     void
18609 func_line_start(cookie)
18610     void    *cookie;
18611 {
18612     funccall_T	*fcp = (funccall_T *)cookie;
18613     ufunc_T	*fp = fcp->func;
18614 
18615     if (fp->uf_profiling && sourcing_lnum >= 1
18616 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18617     {
18618 	fp->uf_tml_idx = sourcing_lnum - 1;
18619 	fp->uf_tml_execed = FALSE;
18620 	profile_start(&fp->uf_tml_start);
18621 	profile_zero(&fp->uf_tml_children);
18622 	profile_get_wait(&fp->uf_tml_wait);
18623     }
18624 }
18625 
18626 /*
18627  * Called when actually executing a function line.
18628  */
18629     void
18630 func_line_exec(cookie)
18631     void    *cookie;
18632 {
18633     funccall_T	*fcp = (funccall_T *)cookie;
18634     ufunc_T	*fp = fcp->func;
18635 
18636     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18637 	fp->uf_tml_execed = TRUE;
18638 }
18639 
18640 /*
18641  * Called when done with a function line.
18642  */
18643     void
18644 func_line_end(cookie)
18645     void    *cookie;
18646 {
18647     funccall_T	*fcp = (funccall_T *)cookie;
18648     ufunc_T	*fp = fcp->func;
18649 
18650     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18651     {
18652 	if (fp->uf_tml_execed)
18653 	{
18654 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18655 	    profile_end(&fp->uf_tml_start);
18656 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18657 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18658 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18659 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18660 	}
18661 	fp->uf_tml_idx = -1;
18662     }
18663 }
18664 #endif
18665 
18666 /*
18667  * Return TRUE if the currently active function should be ended, because a
18668  * return was encountered or an error occured.  Used inside a ":while".
18669  */
18670     int
18671 func_has_ended(cookie)
18672     void    *cookie;
18673 {
18674     funccall_T  *fcp = (funccall_T *)cookie;
18675 
18676     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18677      * an error inside a try conditional. */
18678     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18679 	    || fcp->returned);
18680 }
18681 
18682 /*
18683  * return TRUE if cookie indicates a function which "abort"s on errors.
18684  */
18685     int
18686 func_has_abort(cookie)
18687     void    *cookie;
18688 {
18689     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18690 }
18691 
18692 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18693 typedef enum
18694 {
18695     VAR_FLAVOUR_DEFAULT,
18696     VAR_FLAVOUR_SESSION,
18697     VAR_FLAVOUR_VIMINFO
18698 } var_flavour_T;
18699 
18700 static var_flavour_T var_flavour __ARGS((char_u *varname));
18701 
18702     static var_flavour_T
18703 var_flavour(varname)
18704     char_u *varname;
18705 {
18706     char_u *p = varname;
18707 
18708     if (ASCII_ISUPPER(*p))
18709     {
18710 	while (*(++p))
18711 	    if (ASCII_ISLOWER(*p))
18712 		return VAR_FLAVOUR_SESSION;
18713 	return VAR_FLAVOUR_VIMINFO;
18714     }
18715     else
18716 	return VAR_FLAVOUR_DEFAULT;
18717 }
18718 #endif
18719 
18720 #if defined(FEAT_VIMINFO) || defined(PROTO)
18721 /*
18722  * Restore global vars that start with a capital from the viminfo file
18723  */
18724     int
18725 read_viminfo_varlist(virp, writing)
18726     vir_T	*virp;
18727     int		writing;
18728 {
18729     char_u	*tab;
18730     int		is_string = FALSE;
18731     typval_T	tv;
18732 
18733     if (!writing && (find_viminfo_parameter('!') != NULL))
18734     {
18735 	tab = vim_strchr(virp->vir_line + 1, '\t');
18736 	if (tab != NULL)
18737 	{
18738 	    *tab++ = '\0';	/* isolate the variable name */
18739 	    if (*tab == 'S')	/* string var */
18740 		is_string = TRUE;
18741 
18742 	    tab = vim_strchr(tab, '\t');
18743 	    if (tab != NULL)
18744 	    {
18745 		if (is_string)
18746 		{
18747 		    tv.v_type = VAR_STRING;
18748 		    tv.vval.v_string = viminfo_readstring(virp,
18749 				       (int)(tab - virp->vir_line + 1), TRUE);
18750 		}
18751 		else
18752 		{
18753 		    tv.v_type = VAR_NUMBER;
18754 		    tv.vval.v_number = atol((char *)tab + 1);
18755 		}
18756 		set_var(virp->vir_line + 1, &tv, FALSE);
18757 		if (is_string)
18758 		    vim_free(tv.vval.v_string);
18759 	    }
18760 	}
18761     }
18762 
18763     return viminfo_readline(virp);
18764 }
18765 
18766 /*
18767  * Write global vars that start with a capital to the viminfo file
18768  */
18769     void
18770 write_viminfo_varlist(fp)
18771     FILE    *fp;
18772 {
18773     hashitem_T	*hi;
18774     dictitem_T	*this_var;
18775     int		todo;
18776     char	*s;
18777     char_u	*p;
18778     char_u	*tofree;
18779     char_u	numbuf[NUMBUFLEN];
18780 
18781     if (find_viminfo_parameter('!') == NULL)
18782 	return;
18783 
18784     fprintf(fp, _("\n# global variables:\n"));
18785 
18786     todo = globvarht.ht_used;
18787     for (hi = globvarht.ht_array; todo > 0; ++hi)
18788     {
18789 	if (!HASHITEM_EMPTY(hi))
18790 	{
18791 	    --todo;
18792 	    this_var = HI2DI(hi);
18793 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18794 	    {
18795 		switch (this_var->di_tv.v_type)
18796 		{
18797 		    case VAR_STRING: s = "STR"; break;
18798 		    case VAR_NUMBER: s = "NUM"; break;
18799 		    default: continue;
18800 		}
18801 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
18802 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
18803 		if (p != NULL)
18804 		    viminfo_writestring(fp, p);
18805 		vim_free(tofree);
18806 	    }
18807 	}
18808     }
18809 }
18810 #endif
18811 
18812 #if defined(FEAT_SESSION) || defined(PROTO)
18813     int
18814 store_session_globals(fd)
18815     FILE	*fd;
18816 {
18817     hashitem_T	*hi;
18818     dictitem_T	*this_var;
18819     int		todo;
18820     char_u	*p, *t;
18821 
18822     todo = globvarht.ht_used;
18823     for (hi = globvarht.ht_array; todo > 0; ++hi)
18824     {
18825 	if (!HASHITEM_EMPTY(hi))
18826 	{
18827 	    --todo;
18828 	    this_var = HI2DI(hi);
18829 	    if ((this_var->di_tv.v_type == VAR_NUMBER
18830 			|| this_var->di_tv.v_type == VAR_STRING)
18831 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
18832 	    {
18833 		/* Escape special characters with a backslash.  Turn a LF and
18834 		 * CR into \n and \r. */
18835 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
18836 							(char_u *)"\\\"\n\r");
18837 		if (p == NULL)	    /* out of memory */
18838 		    break;
18839 		for (t = p; *t != NUL; ++t)
18840 		    if (*t == '\n')
18841 			*t = 'n';
18842 		    else if (*t == '\r')
18843 			*t = 'r';
18844 		if ((fprintf(fd, "let %s = %c%s%c",
18845 				this_var->di_key,
18846 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18847 									: ' ',
18848 				p,
18849 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18850 								   : ' ') < 0)
18851 			|| put_eol(fd) == FAIL)
18852 		{
18853 		    vim_free(p);
18854 		    return FAIL;
18855 		}
18856 		vim_free(p);
18857 	    }
18858 	}
18859     }
18860     return OK;
18861 }
18862 #endif
18863 
18864 /*
18865  * Display script name where an item was last set.
18866  * Should only be invoked when 'verbose' is non-zero.
18867  */
18868     void
18869 last_set_msg(scriptID)
18870     scid_T scriptID;
18871 {
18872     if (scriptID != 0)
18873     {
18874 	verbose_enter();
18875 	MSG_PUTS(_("\n\tLast set from "));
18876 	MSG_PUTS(get_scriptname(scriptID));
18877 	verbose_leave();
18878     }
18879 }
18880 
18881 #endif /* FEAT_EVAL */
18882 
18883 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
18884 
18885 
18886 #ifdef WIN3264
18887 /*
18888  * Functions for ":8" filename modifier: get 8.3 version of a filename.
18889  */
18890 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18891 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
18892 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18893 
18894 /*
18895  * Get the short pathname of a file.
18896  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
18897  */
18898     static int
18899 get_short_pathname(fnamep, bufp, fnamelen)
18900     char_u	**fnamep;
18901     char_u	**bufp;
18902     int		*fnamelen;
18903 {
18904     int		l,len;
18905     char_u	*newbuf;
18906 
18907     len = *fnamelen;
18908 
18909     l = GetShortPathName(*fnamep, *fnamep, len);
18910     if (l > len - 1)
18911     {
18912 	/* If that doesn't work (not enough space), then save the string
18913 	 * and try again with a new buffer big enough
18914 	 */
18915 	newbuf = vim_strnsave(*fnamep, l);
18916 	if (newbuf == NULL)
18917 	    return 0;
18918 
18919 	vim_free(*bufp);
18920 	*fnamep = *bufp = newbuf;
18921 
18922 	l = GetShortPathName(*fnamep,*fnamep,l+1);
18923 
18924 	/* Really should always succeed, as the buffer is big enough */
18925     }
18926 
18927     *fnamelen = l;
18928     return 1;
18929 }
18930 
18931 /*
18932  * Create a short path name.  Returns the length of the buffer it needs.
18933  * Doesn't copy over the end of the buffer passed in.
18934  */
18935     static int
18936 shortpath_for_invalid_fname(fname, bufp, fnamelen)
18937     char_u	**fname;
18938     char_u	**bufp;
18939     int		*fnamelen;
18940 {
18941     char_u	*s, *p, *pbuf2, *pbuf3;
18942     char_u	ch;
18943     int		len, len2, plen, slen;
18944 
18945     /* Make a copy */
18946     len2 = *fnamelen;
18947     pbuf2 = vim_strnsave(*fname, len2);
18948     pbuf3 = NULL;
18949 
18950     s = pbuf2 + len2 - 1; /* Find the end */
18951     slen = 1;
18952     plen = len2;
18953 
18954     if (after_pathsep(pbuf2, s + 1))
18955     {
18956 	--s;
18957 	++slen;
18958 	--plen;
18959     }
18960 
18961     do
18962     {
18963 	/* Go back one path-seperator */
18964 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
18965 	{
18966 	    --s;
18967 	    ++slen;
18968 	    --plen;
18969 	}
18970 	if (s <= pbuf2)
18971 	    break;
18972 
18973 	/* Remeber the character that is about to be blatted */
18974 	ch = *s;
18975 	*s = 0; /* get_short_pathname requires a null-terminated string */
18976 
18977 	/* Try it in situ */
18978 	p = pbuf2;
18979 	if (!get_short_pathname(&p, &pbuf3, &plen))
18980 	{
18981 	    vim_free(pbuf2);
18982 	    return -1;
18983 	}
18984 	*s = ch;    /* Preserve the string */
18985     } while (plen == 0);
18986 
18987     if (plen > 0)
18988     {
18989 	/* Remeber the length of the new string.  */
18990 	*fnamelen = len = plen + slen;
18991 	vim_free(*bufp);
18992 	if (len > len2)
18993 	{
18994 	    /* If there's not enough space in the currently allocated string,
18995 	     * then copy it to a buffer big enough.
18996 	     */
18997 	    *fname= *bufp = vim_strnsave(p, len);
18998 	    if (*fname == NULL)
18999 		return -1;
19000 	}
19001 	else
19002 	{
19003 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
19004 	    *fname = *bufp = pbuf2;
19005 	    if (p != pbuf2)
19006 		strncpy(*fname, p, plen);
19007 	    pbuf2 = NULL;
19008 	}
19009 	/* Concat the next bit */
19010 	strncpy(*fname + plen, s, slen);
19011 	(*fname)[len] = '\0';
19012     }
19013     vim_free(pbuf3);
19014     vim_free(pbuf2);
19015     return 0;
19016 }
19017 
19018 /*
19019  * Get a pathname for a partial path.
19020  */
19021     static int
19022 shortpath_for_partial(fnamep, bufp, fnamelen)
19023     char_u	**fnamep;
19024     char_u	**bufp;
19025     int		*fnamelen;
19026 {
19027     int		sepcount, len, tflen;
19028     char_u	*p;
19029     char_u	*pbuf, *tfname;
19030     int		hasTilde;
19031 
19032     /* Count up the path seperators from the RHS.. so we know which part
19033      * of the path to return.
19034      */
19035     sepcount = 0;
19036     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
19037 	if (vim_ispathsep(*p))
19038 	    ++sepcount;
19039 
19040     /* Need full path first (use expand_env() to remove a "~/") */
19041     hasTilde = (**fnamep == '~');
19042     if (hasTilde)
19043 	pbuf = tfname = expand_env_save(*fnamep);
19044     else
19045 	pbuf = tfname = FullName_save(*fnamep, FALSE);
19046 
19047     len = tflen = STRLEN(tfname);
19048 
19049     if (!get_short_pathname(&tfname, &pbuf, &len))
19050 	return -1;
19051 
19052     if (len == 0)
19053     {
19054 	/* Don't have a valid filename, so shorten the rest of the
19055 	 * path if we can. This CAN give us invalid 8.3 filenames, but
19056 	 * there's not a lot of point in guessing what it might be.
19057 	 */
19058 	len = tflen;
19059 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
19060 	    return -1;
19061     }
19062 
19063     /* Count the paths backward to find the beginning of the desired string. */
19064     for (p = tfname + len - 1; p >= tfname; --p)
19065     {
19066 #ifdef FEAT_MBYTE
19067 	if (has_mbyte)
19068 	    p -= mb_head_off(tfname, p);
19069 #endif
19070 	if (vim_ispathsep(*p))
19071 	{
19072 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
19073 		break;
19074 	    else
19075 		sepcount --;
19076 	}
19077     }
19078     if (hasTilde)
19079     {
19080 	--p;
19081 	if (p >= tfname)
19082 	    *p = '~';
19083 	else
19084 	    return -1;
19085     }
19086     else
19087 	++p;
19088 
19089     /* Copy in the string - p indexes into tfname - allocated at pbuf */
19090     vim_free(*bufp);
19091     *fnamelen = (int)STRLEN(p);
19092     *bufp = pbuf;
19093     *fnamep = p;
19094 
19095     return 0;
19096 }
19097 #endif /* WIN3264 */
19098 
19099 /*
19100  * Adjust a filename, according to a string of modifiers.
19101  * *fnamep must be NUL terminated when called.  When returning, the length is
19102  * determined by *fnamelen.
19103  * Returns valid flags.
19104  * When there is an error, *fnamep is set to NULL.
19105  */
19106     int
19107 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
19108     char_u	*src;		/* string with modifiers */
19109     int		*usedlen;	/* characters after src that are used */
19110     char_u	**fnamep;	/* file name so far */
19111     char_u	**bufp;		/* buffer for allocated file name or NULL */
19112     int		*fnamelen;	/* length of fnamep */
19113 {
19114     int		valid = 0;
19115     char_u	*tail;
19116     char_u	*s, *p, *pbuf;
19117     char_u	dirname[MAXPATHL];
19118     int		c;
19119     int		has_fullname = 0;
19120 #ifdef WIN3264
19121     int		has_shortname = 0;
19122 #endif
19123 
19124 repeat:
19125     /* ":p" - full path/file_name */
19126     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
19127     {
19128 	has_fullname = 1;
19129 
19130 	valid |= VALID_PATH;
19131 	*usedlen += 2;
19132 
19133 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
19134 	if ((*fnamep)[0] == '~'
19135 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
19136 		&& ((*fnamep)[1] == '/'
19137 # ifdef BACKSLASH_IN_FILENAME
19138 		    || (*fnamep)[1] == '\\'
19139 # endif
19140 		    || (*fnamep)[1] == NUL)
19141 
19142 #endif
19143 	   )
19144 	{
19145 	    *fnamep = expand_env_save(*fnamep);
19146 	    vim_free(*bufp);	/* free any allocated file name */
19147 	    *bufp = *fnamep;
19148 	    if (*fnamep == NULL)
19149 		return -1;
19150 	}
19151 
19152 	/* When "/." or "/.." is used: force expansion to get rid of it. */
19153 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
19154 	{
19155 	    if (vim_ispathsep(*p)
19156 		    && p[1] == '.'
19157 		    && (p[2] == NUL
19158 			|| vim_ispathsep(p[2])
19159 			|| (p[2] == '.'
19160 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
19161 		break;
19162 	}
19163 
19164 	/* FullName_save() is slow, don't use it when not needed. */
19165 	if (*p != NUL || !vim_isAbsName(*fnamep))
19166 	{
19167 	    *fnamep = FullName_save(*fnamep, *p != NUL);
19168 	    vim_free(*bufp);	/* free any allocated file name */
19169 	    *bufp = *fnamep;
19170 	    if (*fnamep == NULL)
19171 		return -1;
19172 	}
19173 
19174 	/* Append a path separator to a directory. */
19175 	if (mch_isdir(*fnamep))
19176 	{
19177 	    /* Make room for one or two extra characters. */
19178 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
19179 	    vim_free(*bufp);	/* free any allocated file name */
19180 	    *bufp = *fnamep;
19181 	    if (*fnamep == NULL)
19182 		return -1;
19183 	    add_pathsep(*fnamep);
19184 	}
19185     }
19186 
19187     /* ":." - path relative to the current directory */
19188     /* ":~" - path relative to the home directory */
19189     /* ":8" - shortname path - postponed till after */
19190     while (src[*usedlen] == ':'
19191 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
19192     {
19193 	*usedlen += 2;
19194 	if (c == '8')
19195 	{
19196 #ifdef WIN3264
19197 	    has_shortname = 1; /* Postpone this. */
19198 #endif
19199 	    continue;
19200 	}
19201 	pbuf = NULL;
19202 	/* Need full path first (use expand_env() to remove a "~/") */
19203 	if (!has_fullname)
19204 	{
19205 	    if (c == '.' && **fnamep == '~')
19206 		p = pbuf = expand_env_save(*fnamep);
19207 	    else
19208 		p = pbuf = FullName_save(*fnamep, FALSE);
19209 	}
19210 	else
19211 	    p = *fnamep;
19212 
19213 	has_fullname = 0;
19214 
19215 	if (p != NULL)
19216 	{
19217 	    if (c == '.')
19218 	    {
19219 		mch_dirname(dirname, MAXPATHL);
19220 		s = shorten_fname(p, dirname);
19221 		if (s != NULL)
19222 		{
19223 		    *fnamep = s;
19224 		    if (pbuf != NULL)
19225 		    {
19226 			vim_free(*bufp);   /* free any allocated file name */
19227 			*bufp = pbuf;
19228 			pbuf = NULL;
19229 		    }
19230 		}
19231 	    }
19232 	    else
19233 	    {
19234 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19235 		/* Only replace it when it starts with '~' */
19236 		if (*dirname == '~')
19237 		{
19238 		    s = vim_strsave(dirname);
19239 		    if (s != NULL)
19240 		    {
19241 			*fnamep = s;
19242 			vim_free(*bufp);
19243 			*bufp = s;
19244 		    }
19245 		}
19246 	    }
19247 	    vim_free(pbuf);
19248 	}
19249     }
19250 
19251     tail = gettail(*fnamep);
19252     *fnamelen = (int)STRLEN(*fnamep);
19253 
19254     /* ":h" - head, remove "/file_name", can be repeated  */
19255     /* Don't remove the first "/" or "c:\" */
19256     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19257     {
19258 	valid |= VALID_HEAD;
19259 	*usedlen += 2;
19260 	s = get_past_head(*fnamep);
19261 	while (tail > s && after_pathsep(s, tail))
19262 	    --tail;
19263 	*fnamelen = (int)(tail - *fnamep);
19264 #ifdef VMS
19265 	if (*fnamelen > 0)
19266 	    *fnamelen += 1; /* the path separator is part of the path */
19267 #endif
19268 	while (tail > s && !after_pathsep(s, tail))
19269 	    mb_ptr_back(*fnamep, tail);
19270     }
19271 
19272     /* ":8" - shortname  */
19273     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19274     {
19275 	*usedlen += 2;
19276 #ifdef WIN3264
19277 	has_shortname = 1;
19278 #endif
19279     }
19280 
19281 #ifdef WIN3264
19282     /* Check shortname after we have done 'heads' and before we do 'tails'
19283      */
19284     if (has_shortname)
19285     {
19286 	pbuf = NULL;
19287 	/* Copy the string if it is shortened by :h */
19288 	if (*fnamelen < (int)STRLEN(*fnamep))
19289 	{
19290 	    p = vim_strnsave(*fnamep, *fnamelen);
19291 	    if (p == 0)
19292 		return -1;
19293 	    vim_free(*bufp);
19294 	    *bufp = *fnamep = p;
19295 	}
19296 
19297 	/* Split into two implementations - makes it easier.  First is where
19298 	 * there isn't a full name already, second is where there is.
19299 	 */
19300 	if (!has_fullname && !vim_isAbsName(*fnamep))
19301 	{
19302 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19303 		return -1;
19304 	}
19305 	else
19306 	{
19307 	    int		l;
19308 
19309 	    /* Simple case, already have the full-name
19310 	     * Nearly always shorter, so try first time. */
19311 	    l = *fnamelen;
19312 	    if (!get_short_pathname(fnamep, bufp, &l))
19313 		return -1;
19314 
19315 	    if (l == 0)
19316 	    {
19317 		/* Couldn't find the filename.. search the paths.
19318 		 */
19319 		l = *fnamelen;
19320 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19321 		    return -1;
19322 	    }
19323 	    *fnamelen = l;
19324 	}
19325     }
19326 #endif /* WIN3264 */
19327 
19328     /* ":t" - tail, just the basename */
19329     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19330     {
19331 	*usedlen += 2;
19332 	*fnamelen -= (int)(tail - *fnamep);
19333 	*fnamep = tail;
19334     }
19335 
19336     /* ":e" - extension, can be repeated */
19337     /* ":r" - root, without extension, can be repeated */
19338     while (src[*usedlen] == ':'
19339 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19340     {
19341 	/* find a '.' in the tail:
19342 	 * - for second :e: before the current fname
19343 	 * - otherwise: The last '.'
19344 	 */
19345 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19346 	    s = *fnamep - 2;
19347 	else
19348 	    s = *fnamep + *fnamelen - 1;
19349 	for ( ; s > tail; --s)
19350 	    if (s[0] == '.')
19351 		break;
19352 	if (src[*usedlen + 1] == 'e')		/* :e */
19353 	{
19354 	    if (s > tail)
19355 	    {
19356 		*fnamelen += (int)(*fnamep - (s + 1));
19357 		*fnamep = s + 1;
19358 #ifdef VMS
19359 		/* cut version from the extension */
19360 		s = *fnamep + *fnamelen - 1;
19361 		for ( ; s > *fnamep; --s)
19362 		    if (s[0] == ';')
19363 			break;
19364 		if (s > *fnamep)
19365 		    *fnamelen = s - *fnamep;
19366 #endif
19367 	    }
19368 	    else if (*fnamep <= tail)
19369 		*fnamelen = 0;
19370 	}
19371 	else				/* :r */
19372 	{
19373 	    if (s > tail)	/* remove one extension */
19374 		*fnamelen = (int)(s - *fnamep);
19375 	}
19376 	*usedlen += 2;
19377     }
19378 
19379     /* ":s?pat?foo?" - substitute */
19380     /* ":gs?pat?foo?" - global substitute */
19381     if (src[*usedlen] == ':'
19382 	    && (src[*usedlen + 1] == 's'
19383 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19384     {
19385 	char_u	    *str;
19386 	char_u	    *pat;
19387 	char_u	    *sub;
19388 	int	    sep;
19389 	char_u	    *flags;
19390 	int	    didit = FALSE;
19391 
19392 	flags = (char_u *)"";
19393 	s = src + *usedlen + 2;
19394 	if (src[*usedlen + 1] == 'g')
19395 	{
19396 	    flags = (char_u *)"g";
19397 	    ++s;
19398 	}
19399 
19400 	sep = *s++;
19401 	if (sep)
19402 	{
19403 	    /* find end of pattern */
19404 	    p = vim_strchr(s, sep);
19405 	    if (p != NULL)
19406 	    {
19407 		pat = vim_strnsave(s, (int)(p - s));
19408 		if (pat != NULL)
19409 		{
19410 		    s = p + 1;
19411 		    /* find end of substitution */
19412 		    p = vim_strchr(s, sep);
19413 		    if (p != NULL)
19414 		    {
19415 			sub = vim_strnsave(s, (int)(p - s));
19416 			str = vim_strnsave(*fnamep, *fnamelen);
19417 			if (sub != NULL && str != NULL)
19418 			{
19419 			    *usedlen = (int)(p + 1 - src);
19420 			    s = do_string_sub(str, pat, sub, flags);
19421 			    if (s != NULL)
19422 			    {
19423 				*fnamep = s;
19424 				*fnamelen = (int)STRLEN(s);
19425 				vim_free(*bufp);
19426 				*bufp = s;
19427 				didit = TRUE;
19428 			    }
19429 			}
19430 			vim_free(sub);
19431 			vim_free(str);
19432 		    }
19433 		    vim_free(pat);
19434 		}
19435 	    }
19436 	    /* after using ":s", repeat all the modifiers */
19437 	    if (didit)
19438 		goto repeat;
19439 	}
19440     }
19441 
19442     return valid;
19443 }
19444 
19445 /*
19446  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19447  * "flags" can be "g" to do a global substitute.
19448  * Returns an allocated string, NULL for error.
19449  */
19450     char_u *
19451 do_string_sub(str, pat, sub, flags)
19452     char_u	*str;
19453     char_u	*pat;
19454     char_u	*sub;
19455     char_u	*flags;
19456 {
19457     int		sublen;
19458     regmatch_T	regmatch;
19459     int		i;
19460     int		do_all;
19461     char_u	*tail;
19462     garray_T	ga;
19463     char_u	*ret;
19464     char_u	*save_cpo;
19465 
19466     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19467     save_cpo = p_cpo;
19468     p_cpo = (char_u *)"";
19469 
19470     ga_init2(&ga, 1, 200);
19471 
19472     do_all = (flags[0] == 'g');
19473 
19474     regmatch.rm_ic = p_ic;
19475     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19476     if (regmatch.regprog != NULL)
19477     {
19478 	tail = str;
19479 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19480 	{
19481 	    /*
19482 	     * Get some space for a temporary buffer to do the substitution
19483 	     * into.  It will contain:
19484 	     * - The text up to where the match is.
19485 	     * - The substituted text.
19486 	     * - The text after the match.
19487 	     */
19488 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19489 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19490 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19491 	    {
19492 		ga_clear(&ga);
19493 		break;
19494 	    }
19495 
19496 	    /* copy the text up to where the match is */
19497 	    i = (int)(regmatch.startp[0] - tail);
19498 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19499 	    /* add the substituted text */
19500 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19501 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19502 	    ga.ga_len += i + sublen - 1;
19503 	    /* avoid getting stuck on a match with an empty string */
19504 	    if (tail == regmatch.endp[0])
19505 	    {
19506 		if (*tail == NUL)
19507 		    break;
19508 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19509 		++ga.ga_len;
19510 	    }
19511 	    else
19512 	    {
19513 		tail = regmatch.endp[0];
19514 		if (*tail == NUL)
19515 		    break;
19516 	    }
19517 	    if (!do_all)
19518 		break;
19519 	}
19520 
19521 	if (ga.ga_data != NULL)
19522 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19523 
19524 	vim_free(regmatch.regprog);
19525     }
19526 
19527     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19528     ga_clear(&ga);
19529     p_cpo = save_cpo;
19530 
19531     return ret;
19532 }
19533 
19534 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19535