xref: /vim-8.2.3635/src/eval.c (revision e344bead) 
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 CURSOR_SHAPE
10047 	"cursorshape",
10048 #endif
10049 #ifdef DEBUG
10050 	"debug",
10051 #endif
10052 #ifdef FEAT_CON_DIALOG
10053 	"dialog_con",
10054 #endif
10055 #ifdef FEAT_GUI_DIALOG
10056 	"dialog_gui",
10057 #endif
10058 #ifdef FEAT_DIFF
10059 	"diff",
10060 #endif
10061 #ifdef FEAT_DIGRAPHS
10062 	"digraphs",
10063 #endif
10064 #ifdef FEAT_DND
10065 	"dnd",
10066 #endif
10067 #ifdef FEAT_EMACS_TAGS
10068 	"emacs_tags",
10069 #endif
10070 	"eval",	    /* always present, of course! */
10071 #ifdef FEAT_EX_EXTRA
10072 	"ex_extra",
10073 #endif
10074 #ifdef FEAT_SEARCH_EXTRA
10075 	"extra_search",
10076 #endif
10077 #ifdef FEAT_FKMAP
10078 	"farsi",
10079 #endif
10080 #ifdef FEAT_SEARCHPATH
10081 	"file_in_path",
10082 #endif
10083 #if defined(UNIX) && !defined(USE_SYSTEM)
10084 	"filterpipe",
10085 #endif
10086 #ifdef FEAT_FIND_ID
10087 	"find_in_path",
10088 #endif
10089 #ifdef FEAT_FOLDING
10090 	"folding",
10091 #endif
10092 #ifdef FEAT_FOOTER
10093 	"footer",
10094 #endif
10095 #if !defined(USE_SYSTEM) && defined(UNIX)
10096 	"fork",
10097 #endif
10098 #ifdef FEAT_GETTEXT
10099 	"gettext",
10100 #endif
10101 #ifdef FEAT_GUI
10102 	"gui",
10103 #endif
10104 #ifdef FEAT_GUI_ATHENA
10105 # ifdef FEAT_GUI_NEXTAW
10106 	"gui_neXtaw",
10107 # else
10108 	"gui_athena",
10109 # endif
10110 #endif
10111 #ifdef FEAT_GUI_KDE
10112 	"gui_kde",
10113 #endif
10114 #ifdef FEAT_GUI_GTK
10115 	"gui_gtk",
10116 # ifdef HAVE_GTK2
10117 	"gui_gtk2",
10118 # endif
10119 #endif
10120 #ifdef FEAT_GUI_MAC
10121 	"gui_mac",
10122 #endif
10123 #ifdef FEAT_GUI_MOTIF
10124 	"gui_motif",
10125 #endif
10126 #ifdef FEAT_GUI_PHOTON
10127 	"gui_photon",
10128 #endif
10129 #ifdef FEAT_GUI_W16
10130 	"gui_win16",
10131 #endif
10132 #ifdef FEAT_GUI_W32
10133 	"gui_win32",
10134 #endif
10135 #ifdef FEAT_HANGULIN
10136 	"hangul_input",
10137 #endif
10138 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10139 	"iconv",
10140 #endif
10141 #ifdef FEAT_INS_EXPAND
10142 	"insert_expand",
10143 #endif
10144 #ifdef FEAT_JUMPLIST
10145 	"jumplist",
10146 #endif
10147 #ifdef FEAT_KEYMAP
10148 	"keymap",
10149 #endif
10150 #ifdef FEAT_LANGMAP
10151 	"langmap",
10152 #endif
10153 #ifdef FEAT_LIBCALL
10154 	"libcall",
10155 #endif
10156 #ifdef FEAT_LINEBREAK
10157 	"linebreak",
10158 #endif
10159 #ifdef FEAT_LISP
10160 	"lispindent",
10161 #endif
10162 #ifdef FEAT_LISTCMDS
10163 	"listcmds",
10164 #endif
10165 #ifdef FEAT_LOCALMAP
10166 	"localmap",
10167 #endif
10168 #ifdef FEAT_MENU
10169 	"menu",
10170 #endif
10171 #ifdef FEAT_SESSION
10172 	"mksession",
10173 #endif
10174 #ifdef FEAT_MODIFY_FNAME
10175 	"modify_fname",
10176 #endif
10177 #ifdef FEAT_MOUSE
10178 	"mouse",
10179 #endif
10180 #ifdef FEAT_MOUSESHAPE
10181 	"mouseshape",
10182 #endif
10183 #if defined(UNIX) || defined(VMS)
10184 # ifdef FEAT_MOUSE_DEC
10185 	"mouse_dec",
10186 # endif
10187 # ifdef FEAT_MOUSE_GPM
10188 	"mouse_gpm",
10189 # endif
10190 # ifdef FEAT_MOUSE_JSB
10191 	"mouse_jsbterm",
10192 # endif
10193 # ifdef FEAT_MOUSE_NET
10194 	"mouse_netterm",
10195 # endif
10196 # ifdef FEAT_MOUSE_PTERM
10197 	"mouse_pterm",
10198 # endif
10199 # ifdef FEAT_MOUSE_XTERM
10200 	"mouse_xterm",
10201 # endif
10202 #endif
10203 #ifdef FEAT_MBYTE
10204 	"multi_byte",
10205 #endif
10206 #ifdef FEAT_MBYTE_IME
10207 	"multi_byte_ime",
10208 #endif
10209 #ifdef FEAT_MULTI_LANG
10210 	"multi_lang",
10211 #endif
10212 #ifdef FEAT_MZSCHEME
10213 #ifndef DYNAMIC_MZSCHEME
10214 	"mzscheme",
10215 #endif
10216 #endif
10217 #ifdef FEAT_OLE
10218 	"ole",
10219 #endif
10220 #ifdef FEAT_OSFILETYPE
10221 	"osfiletype",
10222 #endif
10223 #ifdef FEAT_PATH_EXTRA
10224 	"path_extra",
10225 #endif
10226 #ifdef FEAT_PERL
10227 #ifndef DYNAMIC_PERL
10228 	"perl",
10229 #endif
10230 #endif
10231 #ifdef FEAT_PYTHON
10232 #ifndef DYNAMIC_PYTHON
10233 	"python",
10234 #endif
10235 #endif
10236 #ifdef FEAT_POSTSCRIPT
10237 	"postscript",
10238 #endif
10239 #ifdef FEAT_PRINTER
10240 	"printer",
10241 #endif
10242 #ifdef FEAT_PROFILE
10243 	"profile",
10244 #endif
10245 #ifdef FEAT_QUICKFIX
10246 	"quickfix",
10247 #endif
10248 #ifdef FEAT_RIGHTLEFT
10249 	"rightleft",
10250 #endif
10251 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10252 	"ruby",
10253 #endif
10254 #ifdef FEAT_SCROLLBIND
10255 	"scrollbind",
10256 #endif
10257 #ifdef FEAT_CMDL_INFO
10258 	"showcmd",
10259 	"cmdline_info",
10260 #endif
10261 #ifdef FEAT_SIGNS
10262 	"signs",
10263 #endif
10264 #ifdef FEAT_SMARTINDENT
10265 	"smartindent",
10266 #endif
10267 #ifdef FEAT_SNIFF
10268 	"sniff",
10269 #endif
10270 #ifdef FEAT_STL_OPT
10271 	"statusline",
10272 #endif
10273 #ifdef FEAT_SUN_WORKSHOP
10274 	"sun_workshop",
10275 #endif
10276 #ifdef FEAT_NETBEANS_INTG
10277 	"netbeans_intg",
10278 #endif
10279 #ifdef FEAT_SYN_HL
10280 	"spell",
10281 #endif
10282 #ifdef FEAT_SYN_HL
10283 	"syntax",
10284 #endif
10285 #if defined(USE_SYSTEM) || !defined(UNIX)
10286 	"system",
10287 #endif
10288 #ifdef FEAT_TAG_BINS
10289 	"tag_binary",
10290 #endif
10291 #ifdef FEAT_TAG_OLDSTATIC
10292 	"tag_old_static",
10293 #endif
10294 #ifdef FEAT_TAG_ANYWHITE
10295 	"tag_any_white",
10296 #endif
10297 #ifdef FEAT_TCL
10298 # ifndef DYNAMIC_TCL
10299 	"tcl",
10300 # endif
10301 #endif
10302 #ifdef TERMINFO
10303 	"terminfo",
10304 #endif
10305 #ifdef FEAT_TERMRESPONSE
10306 	"termresponse",
10307 #endif
10308 #ifdef FEAT_TEXTOBJ
10309 	"textobjects",
10310 #endif
10311 #ifdef HAVE_TGETENT
10312 	"tgetent",
10313 #endif
10314 #ifdef FEAT_TITLE
10315 	"title",
10316 #endif
10317 #ifdef FEAT_TOOLBAR
10318 	"toolbar",
10319 #endif
10320 #ifdef FEAT_USR_CMDS
10321 	"user-commands",    /* was accidentally included in 5.4 */
10322 	"user_commands",
10323 #endif
10324 #ifdef FEAT_VIMINFO
10325 	"viminfo",
10326 #endif
10327 #ifdef FEAT_VERTSPLIT
10328 	"vertsplit",
10329 #endif
10330 #ifdef FEAT_VIRTUALEDIT
10331 	"virtualedit",
10332 #endif
10333 #ifdef FEAT_VISUAL
10334 	"visual",
10335 #endif
10336 #ifdef FEAT_VISUALEXTRA
10337 	"visualextra",
10338 #endif
10339 #ifdef FEAT_VREPLACE
10340 	"vreplace",
10341 #endif
10342 #ifdef FEAT_WILDIGN
10343 	"wildignore",
10344 #endif
10345 #ifdef FEAT_WILDMENU
10346 	"wildmenu",
10347 #endif
10348 #ifdef FEAT_WINDOWS
10349 	"windows",
10350 #endif
10351 #ifdef FEAT_WAK
10352 	"winaltkeys",
10353 #endif
10354 #ifdef FEAT_WRITEBACKUP
10355 	"writebackup",
10356 #endif
10357 #ifdef FEAT_XIM
10358 	"xim",
10359 #endif
10360 #ifdef FEAT_XFONTSET
10361 	"xfontset",
10362 #endif
10363 #ifdef USE_XSMP
10364 	"xsmp",
10365 #endif
10366 #ifdef USE_XSMP_INTERACT
10367 	"xsmp_interact",
10368 #endif
10369 #ifdef FEAT_XCLIPBOARD
10370 	"xterm_clipboard",
10371 #endif
10372 #ifdef FEAT_XTERM_SAVE
10373 	"xterm_save",
10374 #endif
10375 #if defined(UNIX) && defined(FEAT_X11)
10376 	"X11",
10377 #endif
10378 	NULL
10379     };
10380 
10381     name = get_tv_string(&argvars[0]);
10382     for (i = 0; has_list[i] != NULL; ++i)
10383 	if (STRICMP(name, has_list[i]) == 0)
10384 	{
10385 	    n = TRUE;
10386 	    break;
10387 	}
10388 
10389     if (n == FALSE)
10390     {
10391 	if (STRNICMP(name, "patch", 5) == 0)
10392 	    n = has_patch(atoi((char *)name + 5));
10393 	else if (STRICMP(name, "vim_starting") == 0)
10394 	    n = (starting != 0);
10395 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10396 	else if (STRICMP(name, "balloon_multiline") == 0)
10397 	    n = multiline_balloon_available();
10398 #endif
10399 #ifdef DYNAMIC_TCL
10400 	else if (STRICMP(name, "tcl") == 0)
10401 	    n = tcl_enabled(FALSE);
10402 #endif
10403 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10404 	else if (STRICMP(name, "iconv") == 0)
10405 	    n = iconv_enabled(FALSE);
10406 #endif
10407 #ifdef DYNAMIC_MZSCHEME
10408 	else if (STRICMP(name, "mzscheme") == 0)
10409 	    n = mzscheme_enabled(FALSE);
10410 #endif
10411 #ifdef DYNAMIC_RUBY
10412 	else if (STRICMP(name, "ruby") == 0)
10413 	    n = ruby_enabled(FALSE);
10414 #endif
10415 #ifdef DYNAMIC_PYTHON
10416 	else if (STRICMP(name, "python") == 0)
10417 	    n = python_enabled(FALSE);
10418 #endif
10419 #ifdef DYNAMIC_PERL
10420 	else if (STRICMP(name, "perl") == 0)
10421 	    n = perl_enabled(FALSE);
10422 #endif
10423 #ifdef FEAT_GUI
10424 	else if (STRICMP(name, "gui_running") == 0)
10425 	    n = (gui.in_use || gui.starting);
10426 # ifdef FEAT_GUI_W32
10427 	else if (STRICMP(name, "gui_win32s") == 0)
10428 	    n = gui_is_win32s();
10429 # endif
10430 # ifdef FEAT_BROWSE
10431 	else if (STRICMP(name, "browse") == 0)
10432 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10433 # endif
10434 #endif
10435 #ifdef FEAT_SYN_HL
10436 	else if (STRICMP(name, "syntax_items") == 0)
10437 	    n = syntax_present(curbuf);
10438 #endif
10439 #if defined(WIN3264)
10440 	else if (STRICMP(name, "win95") == 0)
10441 	    n = mch_windows95();
10442 #endif
10443 #ifdef FEAT_NETBEANS_INTG
10444 	else if (STRICMP(name, "netbeans_enabled") == 0)
10445 	    n = usingNetbeans;
10446 #endif
10447     }
10448 
10449     rettv->vval.v_number = n;
10450 }
10451 
10452 /*
10453  * "has_key()" function
10454  */
10455     static void
10456 f_has_key(argvars, rettv)
10457     typval_T	*argvars;
10458     typval_T	*rettv;
10459 {
10460     rettv->vval.v_number = 0;
10461     if (argvars[0].v_type != VAR_DICT)
10462     {
10463 	EMSG(_(e_dictreq));
10464 	return;
10465     }
10466     if (argvars[0].vval.v_dict == NULL)
10467 	return;
10468 
10469     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10470 				      get_tv_string(&argvars[1]), -1) != NULL;
10471 }
10472 
10473 /*
10474  * "hasmapto()" function
10475  */
10476     static void
10477 f_hasmapto(argvars, rettv)
10478     typval_T	*argvars;
10479     typval_T	*rettv;
10480 {
10481     char_u	*name;
10482     char_u	*mode;
10483     char_u	buf[NUMBUFLEN];
10484 
10485     name = get_tv_string(&argvars[0]);
10486     if (argvars[1].v_type == VAR_UNKNOWN)
10487 	mode = (char_u *)"nvo";
10488     else
10489 	mode = get_tv_string_buf(&argvars[1], buf);
10490 
10491     if (map_to_exists(name, mode))
10492 	rettv->vval.v_number = TRUE;
10493     else
10494 	rettv->vval.v_number = FALSE;
10495 }
10496 
10497 /*
10498  * "histadd()" function
10499  */
10500 /*ARGSUSED*/
10501     static void
10502 f_histadd(argvars, rettv)
10503     typval_T	*argvars;
10504     typval_T	*rettv;
10505 {
10506 #ifdef FEAT_CMDHIST
10507     int		histype;
10508     char_u	*str;
10509     char_u	buf[NUMBUFLEN];
10510 #endif
10511 
10512     rettv->vval.v_number = FALSE;
10513     if (check_restricted() || check_secure())
10514 	return;
10515 #ifdef FEAT_CMDHIST
10516     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10517     histype = str != NULL ? get_histtype(str) : -1;
10518     if (histype >= 0)
10519     {
10520 	str = get_tv_string_buf(&argvars[1], buf);
10521 	if (*str != NUL)
10522 	{
10523 	    add_to_history(histype, str, FALSE, NUL);
10524 	    rettv->vval.v_number = TRUE;
10525 	    return;
10526 	}
10527     }
10528 #endif
10529 }
10530 
10531 /*
10532  * "histdel()" function
10533  */
10534 /*ARGSUSED*/
10535     static void
10536 f_histdel(argvars, rettv)
10537     typval_T	*argvars;
10538     typval_T	*rettv;
10539 {
10540 #ifdef FEAT_CMDHIST
10541     int		n;
10542     char_u	buf[NUMBUFLEN];
10543     char_u	*str;
10544 
10545     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10546     if (str == NULL)
10547 	n = 0;
10548     else if (argvars[1].v_type == VAR_UNKNOWN)
10549 	/* only one argument: clear entire history */
10550 	n = clr_history(get_histtype(str));
10551     else if (argvars[1].v_type == VAR_NUMBER)
10552 	/* index given: remove that entry */
10553 	n = del_history_idx(get_histtype(str),
10554 					  (int)get_tv_number(&argvars[1]));
10555     else
10556 	/* string given: remove all matching entries */
10557 	n = del_history_entry(get_histtype(str),
10558 				      get_tv_string_buf(&argvars[1], buf));
10559     rettv->vval.v_number = n;
10560 #else
10561     rettv->vval.v_number = 0;
10562 #endif
10563 }
10564 
10565 /*
10566  * "histget()" function
10567  */
10568 /*ARGSUSED*/
10569     static void
10570 f_histget(argvars, rettv)
10571     typval_T	*argvars;
10572     typval_T	*rettv;
10573 {
10574 #ifdef FEAT_CMDHIST
10575     int		type;
10576     int		idx;
10577     char_u	*str;
10578 
10579     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10580     if (str == NULL)
10581 	rettv->vval.v_string = NULL;
10582     else
10583     {
10584 	type = get_histtype(str);
10585 	if (argvars[1].v_type == VAR_UNKNOWN)
10586 	    idx = get_history_idx(type);
10587 	else
10588 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10589 						    /* -1 on type error */
10590 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10591     }
10592 #else
10593     rettv->vval.v_string = NULL;
10594 #endif
10595     rettv->v_type = VAR_STRING;
10596 }
10597 
10598 /*
10599  * "histnr()" function
10600  */
10601 /*ARGSUSED*/
10602     static void
10603 f_histnr(argvars, rettv)
10604     typval_T	*argvars;
10605     typval_T	*rettv;
10606 {
10607     int		i;
10608 
10609 #ifdef FEAT_CMDHIST
10610     char_u	*history = get_tv_string_chk(&argvars[0]);
10611 
10612     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10613     if (i >= HIST_CMD && i < HIST_COUNT)
10614 	i = get_history_idx(i);
10615     else
10616 #endif
10617 	i = -1;
10618     rettv->vval.v_number = i;
10619 }
10620 
10621 /*
10622  * "highlightID(name)" function
10623  */
10624     static void
10625 f_hlID(argvars, rettv)
10626     typval_T	*argvars;
10627     typval_T	*rettv;
10628 {
10629     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10630 }
10631 
10632 /*
10633  * "highlight_exists()" function
10634  */
10635     static void
10636 f_hlexists(argvars, rettv)
10637     typval_T	*argvars;
10638     typval_T	*rettv;
10639 {
10640     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10641 }
10642 
10643 /*
10644  * "hostname()" function
10645  */
10646 /*ARGSUSED*/
10647     static void
10648 f_hostname(argvars, rettv)
10649     typval_T	*argvars;
10650     typval_T	*rettv;
10651 {
10652     char_u hostname[256];
10653 
10654     mch_get_host_name(hostname, 256);
10655     rettv->v_type = VAR_STRING;
10656     rettv->vval.v_string = vim_strsave(hostname);
10657 }
10658 
10659 /*
10660  * iconv() function
10661  */
10662 /*ARGSUSED*/
10663     static void
10664 f_iconv(argvars, rettv)
10665     typval_T	*argvars;
10666     typval_T	*rettv;
10667 {
10668 #ifdef FEAT_MBYTE
10669     char_u	buf1[NUMBUFLEN];
10670     char_u	buf2[NUMBUFLEN];
10671     char_u	*from, *to, *str;
10672     vimconv_T	vimconv;
10673 #endif
10674 
10675     rettv->v_type = VAR_STRING;
10676     rettv->vval.v_string = NULL;
10677 
10678 #ifdef FEAT_MBYTE
10679     str = get_tv_string(&argvars[0]);
10680     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10681     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10682     vimconv.vc_type = CONV_NONE;
10683     convert_setup(&vimconv, from, to);
10684 
10685     /* If the encodings are equal, no conversion needed. */
10686     if (vimconv.vc_type == CONV_NONE)
10687 	rettv->vval.v_string = vim_strsave(str);
10688     else
10689 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10690 
10691     convert_setup(&vimconv, NULL, NULL);
10692     vim_free(from);
10693     vim_free(to);
10694 #endif
10695 }
10696 
10697 /*
10698  * "indent()" function
10699  */
10700     static void
10701 f_indent(argvars, rettv)
10702     typval_T	*argvars;
10703     typval_T	*rettv;
10704 {
10705     linenr_T	lnum;
10706 
10707     lnum = get_tv_lnum(argvars);
10708     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10709 	rettv->vval.v_number = get_indent_lnum(lnum);
10710     else
10711 	rettv->vval.v_number = -1;
10712 }
10713 
10714 /*
10715  * "index()" function
10716  */
10717     static void
10718 f_index(argvars, rettv)
10719     typval_T	*argvars;
10720     typval_T	*rettv;
10721 {
10722     list_T	*l;
10723     listitem_T	*item;
10724     long	idx = 0;
10725     int		ic = FALSE;
10726 
10727     rettv->vval.v_number = -1;
10728     if (argvars[0].v_type != VAR_LIST)
10729     {
10730 	EMSG(_(e_listreq));
10731 	return;
10732     }
10733     l = argvars[0].vval.v_list;
10734     if (l != NULL)
10735     {
10736 	item = l->lv_first;
10737 	if (argvars[2].v_type != VAR_UNKNOWN)
10738 	{
10739 	    int		error = FALSE;
10740 
10741 	    /* Start at specified item.  Use the cached index that list_find()
10742 	     * sets, so that a negative number also works. */
10743 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10744 	    idx = l->lv_idx;
10745 	    if (argvars[3].v_type != VAR_UNKNOWN)
10746 		ic = get_tv_number_chk(&argvars[3], &error);
10747 	    if (error)
10748 		item = NULL;
10749 	}
10750 
10751 	for ( ; item != NULL; item = item->li_next, ++idx)
10752 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10753 	    {
10754 		rettv->vval.v_number = idx;
10755 		break;
10756 	    }
10757     }
10758 }
10759 
10760 static int inputsecret_flag = 0;
10761 
10762 /*
10763  * "input()" function
10764  *     Also handles inputsecret() when inputsecret is set.
10765  */
10766     static void
10767 f_input(argvars, rettv)
10768     typval_T	*argvars;
10769     typval_T	*rettv;
10770 {
10771     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10772     char_u	*p = NULL;
10773     int		c;
10774     char_u	buf[NUMBUFLEN];
10775     int		cmd_silent_save = cmd_silent;
10776     char_u	*defstr = (char_u *)"";
10777 
10778     rettv->v_type = VAR_STRING;
10779 
10780 #ifdef NO_CONSOLE_INPUT
10781     /* While starting up, there is no place to enter text. */
10782     if (no_console_input())
10783     {
10784 	rettv->vval.v_string = NULL;
10785 	return;
10786     }
10787 #endif
10788 
10789     cmd_silent = FALSE;		/* Want to see the prompt. */
10790     if (prompt != NULL)
10791     {
10792 	/* Only the part of the message after the last NL is considered as
10793 	 * prompt for the command line */
10794 	p = vim_strrchr(prompt, '\n');
10795 	if (p == NULL)
10796 	    p = prompt;
10797 	else
10798 	{
10799 	    ++p;
10800 	    c = *p;
10801 	    *p = NUL;
10802 	    msg_start();
10803 	    msg_clr_eos();
10804 	    msg_puts_attr(prompt, echo_attr);
10805 	    msg_didout = FALSE;
10806 	    msg_starthere();
10807 	    *p = c;
10808 	}
10809 	cmdline_row = msg_row;
10810 
10811 	if (argvars[1].v_type != VAR_UNKNOWN)
10812 	{
10813 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10814 	    if (defstr != NULL)
10815 		stuffReadbuffSpec(defstr);
10816 	}
10817 
10818 	if (defstr != NULL)
10819 	    rettv->vval.v_string =
10820 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr);
10821 
10822 	/* since the user typed this, no need to wait for return */
10823 	need_wait_return = FALSE;
10824 	msg_didout = FALSE;
10825     }
10826     cmd_silent = cmd_silent_save;
10827 }
10828 
10829 /*
10830  * "inputdialog()" function
10831  */
10832     static void
10833 f_inputdialog(argvars, rettv)
10834     typval_T	*argvars;
10835     typval_T	*rettv;
10836 {
10837 #if defined(FEAT_GUI_TEXTDIALOG)
10838     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10839     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10840     {
10841 	char_u	*message;
10842 	char_u	buf[NUMBUFLEN];
10843 	char_u	*defstr = (char_u *)"";
10844 
10845 	message = get_tv_string_chk(&argvars[0]);
10846 	if (argvars[1].v_type != VAR_UNKNOWN
10847 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10848 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10849 	else
10850 	    IObuff[0] = NUL;
10851 	if (message != NULL && defstr != NULL
10852 		&& do_dialog(VIM_QUESTION, NULL, message,
10853 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10854 	    rettv->vval.v_string = vim_strsave(IObuff);
10855 	else
10856 	{
10857 	    if (message != NULL && defstr != NULL
10858 					&& argvars[1].v_type != VAR_UNKNOWN
10859 					&& argvars[2].v_type != VAR_UNKNOWN)
10860 		rettv->vval.v_string = vim_strsave(
10861 				      get_tv_string_buf(&argvars[2], buf));
10862 	    else
10863 		rettv->vval.v_string = NULL;
10864 	}
10865 	rettv->v_type = VAR_STRING;
10866     }
10867     else
10868 #endif
10869 	f_input(argvars, rettv);
10870 }
10871 
10872 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10873 
10874 /*
10875  * "inputrestore()" function
10876  */
10877 /*ARGSUSED*/
10878     static void
10879 f_inputrestore(argvars, rettv)
10880     typval_T	*argvars;
10881     typval_T	*rettv;
10882 {
10883     if (ga_userinput.ga_len > 0)
10884     {
10885 	--ga_userinput.ga_len;
10886 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10887 						       + ga_userinput.ga_len);
10888 	rettv->vval.v_number = 0; /* OK */
10889     }
10890     else if (p_verbose > 1)
10891     {
10892 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
10893 	rettv->vval.v_number = 1; /* Failed */
10894     }
10895 }
10896 
10897 /*
10898  * "inputsave()" function
10899  */
10900 /*ARGSUSED*/
10901     static void
10902 f_inputsave(argvars, rettv)
10903     typval_T	*argvars;
10904     typval_T	*rettv;
10905 {
10906     /* Add an entry to the stack of typehead storage. */
10907     if (ga_grow(&ga_userinput, 1) == OK)
10908     {
10909 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
10910 						       + ga_userinput.ga_len);
10911 	++ga_userinput.ga_len;
10912 	rettv->vval.v_number = 0; /* OK */
10913     }
10914     else
10915 	rettv->vval.v_number = 1; /* Failed */
10916 }
10917 
10918 /*
10919  * "inputsecret()" function
10920  */
10921     static void
10922 f_inputsecret(argvars, rettv)
10923     typval_T	*argvars;
10924     typval_T	*rettv;
10925 {
10926     ++cmdline_star;
10927     ++inputsecret_flag;
10928     f_input(argvars, rettv);
10929     --cmdline_star;
10930     --inputsecret_flag;
10931 }
10932 
10933 /*
10934  * "insert()" function
10935  */
10936     static void
10937 f_insert(argvars, rettv)
10938     typval_T	*argvars;
10939     typval_T	*rettv;
10940 {
10941     long	before = 0;
10942     listitem_T	*item;
10943     list_T	*l;
10944     int		error = FALSE;
10945 
10946     rettv->vval.v_number = 0;
10947     if (argvars[0].v_type != VAR_LIST)
10948 	EMSG2(_(e_listarg), "insert()");
10949     else if ((l = argvars[0].vval.v_list) != NULL
10950 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
10951     {
10952 	if (argvars[2].v_type != VAR_UNKNOWN)
10953 	    before = get_tv_number_chk(&argvars[2], &error);
10954 	if (error)
10955 	    return;		/* type error; errmsg already given */
10956 
10957 	if (before == l->lv_len)
10958 	    item = NULL;
10959 	else
10960 	{
10961 	    item = list_find(l, before);
10962 	    if (item == NULL)
10963 	    {
10964 		EMSGN(_(e_listidx), before);
10965 		l = NULL;
10966 	    }
10967 	}
10968 	if (l != NULL)
10969 	{
10970 	    list_insert_tv(l, &argvars[1], item);
10971 	    copy_tv(&argvars[0], rettv);
10972 	}
10973     }
10974 }
10975 
10976 /*
10977  * "isdirectory()" function
10978  */
10979     static void
10980 f_isdirectory(argvars, rettv)
10981     typval_T	*argvars;
10982     typval_T	*rettv;
10983 {
10984     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
10985 }
10986 
10987 /*
10988  * "islocked()" function
10989  */
10990     static void
10991 f_islocked(argvars, rettv)
10992     typval_T	*argvars;
10993     typval_T	*rettv;
10994 {
10995     lval_T	lv;
10996     char_u	*end;
10997     dictitem_T	*di;
10998 
10999     rettv->vval.v_number = -1;
11000     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
11001 							     FNE_CHECK_START);
11002     if (end != NULL && lv.ll_name != NULL)
11003     {
11004 	if (*end != NUL)
11005 	    EMSG(_(e_trailing));
11006 	else
11007 	{
11008 	    if (lv.ll_tv == NULL)
11009 	    {
11010 		if (check_changedtick(lv.ll_name))
11011 		    rettv->vval.v_number = 1;	    /* always locked */
11012 		else
11013 		{
11014 		    di = find_var(lv.ll_name, NULL);
11015 		    if (di != NULL)
11016 		    {
11017 			/* Consider a variable locked when:
11018 			 * 1. the variable itself is locked
11019 			 * 2. the value of the variable is locked.
11020 			 * 3. the List or Dict value is locked.
11021 			 */
11022 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11023 						  || tv_islocked(&di->di_tv));
11024 		    }
11025 		}
11026 	    }
11027 	    else if (lv.ll_range)
11028 		EMSG(_("E745: Range not allowed"));
11029 	    else if (lv.ll_newkey != NULL)
11030 		EMSG2(_(e_dictkey), lv.ll_newkey);
11031 	    else if (lv.ll_list != NULL)
11032 		/* List item. */
11033 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11034 	    else
11035 		/* Dictionary item. */
11036 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11037 	}
11038     }
11039 
11040     clear_lval(&lv);
11041 }
11042 
11043 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11044 
11045 /*
11046  * Turn a dict into a list:
11047  * "what" == 0: list of keys
11048  * "what" == 1: list of values
11049  * "what" == 2: list of items
11050  */
11051     static void
11052 dict_list(argvars, rettv, what)
11053     typval_T	*argvars;
11054     typval_T	*rettv;
11055     int		what;
11056 {
11057     list_T	*l;
11058     list_T	*l2;
11059     dictitem_T	*di;
11060     hashitem_T	*hi;
11061     listitem_T	*li;
11062     listitem_T	*li2;
11063     dict_T	*d;
11064     int		todo;
11065 
11066     rettv->vval.v_number = 0;
11067     if (argvars[0].v_type != VAR_DICT)
11068     {
11069 	EMSG(_(e_dictreq));
11070 	return;
11071     }
11072     if ((d = argvars[0].vval.v_dict) == NULL)
11073 	return;
11074 
11075     l = list_alloc();
11076     if (l == NULL)
11077 	return;
11078     rettv->v_type = VAR_LIST;
11079     rettv->vval.v_list = l;
11080     ++l->lv_refcount;
11081 
11082     todo = d->dv_hashtab.ht_used;
11083     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11084     {
11085 	if (!HASHITEM_EMPTY(hi))
11086 	{
11087 	    --todo;
11088 	    di = HI2DI(hi);
11089 
11090 	    li = listitem_alloc();
11091 	    if (li == NULL)
11092 		break;
11093 	    list_append(l, li);
11094 
11095 	    if (what == 0)
11096 	    {
11097 		/* keys() */
11098 		li->li_tv.v_type = VAR_STRING;
11099 		li->li_tv.v_lock = 0;
11100 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11101 	    }
11102 	    else if (what == 1)
11103 	    {
11104 		/* values() */
11105 		copy_tv(&di->di_tv, &li->li_tv);
11106 	    }
11107 	    else
11108 	    {
11109 		/* items() */
11110 		l2 = list_alloc();
11111 		li->li_tv.v_type = VAR_LIST;
11112 		li->li_tv.v_lock = 0;
11113 		li->li_tv.vval.v_list = l2;
11114 		if (l2 == NULL)
11115 		    break;
11116 		++l2->lv_refcount;
11117 
11118 		li2 = listitem_alloc();
11119 		if (li2 == NULL)
11120 		    break;
11121 		list_append(l2, li2);
11122 		li2->li_tv.v_type = VAR_STRING;
11123 		li2->li_tv.v_lock = 0;
11124 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11125 
11126 		li2 = listitem_alloc();
11127 		if (li2 == NULL)
11128 		    break;
11129 		list_append(l2, li2);
11130 		copy_tv(&di->di_tv, &li2->li_tv);
11131 	    }
11132 	}
11133     }
11134 }
11135 
11136 /*
11137  * "items(dict)" function
11138  */
11139     static void
11140 f_items(argvars, rettv)
11141     typval_T	*argvars;
11142     typval_T	*rettv;
11143 {
11144     dict_list(argvars, rettv, 2);
11145 }
11146 
11147 /*
11148  * "join()" function
11149  */
11150     static void
11151 f_join(argvars, rettv)
11152     typval_T	*argvars;
11153     typval_T	*rettv;
11154 {
11155     garray_T	ga;
11156     char_u	*sep;
11157 
11158     rettv->vval.v_number = 0;
11159     if (argvars[0].v_type != VAR_LIST)
11160     {
11161 	EMSG(_(e_listreq));
11162 	return;
11163     }
11164     if (argvars[0].vval.v_list == NULL)
11165 	return;
11166     if (argvars[1].v_type == VAR_UNKNOWN)
11167 	sep = (char_u *)" ";
11168     else
11169 	sep = get_tv_string_chk(&argvars[1]);
11170 
11171     rettv->v_type = VAR_STRING;
11172 
11173     if (sep != NULL)
11174     {
11175 	ga_init2(&ga, (int)sizeof(char), 80);
11176 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11177 	ga_append(&ga, NUL);
11178 	rettv->vval.v_string = (char_u *)ga.ga_data;
11179     }
11180     else
11181 	rettv->vval.v_string = NULL;
11182 }
11183 
11184 /*
11185  * "keys()" function
11186  */
11187     static void
11188 f_keys(argvars, rettv)
11189     typval_T	*argvars;
11190     typval_T	*rettv;
11191 {
11192     dict_list(argvars, rettv, 0);
11193 }
11194 
11195 /*
11196  * "last_buffer_nr()" function.
11197  */
11198 /*ARGSUSED*/
11199     static void
11200 f_last_buffer_nr(argvars, rettv)
11201     typval_T	*argvars;
11202     typval_T	*rettv;
11203 {
11204     int		n = 0;
11205     buf_T	*buf;
11206 
11207     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11208 	if (n < buf->b_fnum)
11209 	    n = buf->b_fnum;
11210 
11211     rettv->vval.v_number = n;
11212 }
11213 
11214 /*
11215  * "len()" function
11216  */
11217     static void
11218 f_len(argvars, rettv)
11219     typval_T	*argvars;
11220     typval_T	*rettv;
11221 {
11222     switch (argvars[0].v_type)
11223     {
11224 	case VAR_STRING:
11225 	case VAR_NUMBER:
11226 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11227 					       get_tv_string(&argvars[0]));
11228 	    break;
11229 	case VAR_LIST:
11230 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11231 	    break;
11232 	case VAR_DICT:
11233 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11234 	    break;
11235 	default:
11236 	    EMSG(_("E701: Invalid type for len()"));
11237 	    break;
11238     }
11239 }
11240 
11241 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11242 
11243     static void
11244 libcall_common(argvars, rettv, type)
11245     typval_T	*argvars;
11246     typval_T	*rettv;
11247     int		type;
11248 {
11249 #ifdef FEAT_LIBCALL
11250     char_u		*string_in;
11251     char_u		**string_result;
11252     int			nr_result;
11253 #endif
11254 
11255     rettv->v_type = type;
11256     if (type == VAR_NUMBER)
11257 	rettv->vval.v_number = 0;
11258     else
11259 	rettv->vval.v_string = NULL;
11260 
11261     if (check_restricted() || check_secure())
11262 	return;
11263 
11264 #ifdef FEAT_LIBCALL
11265     /* The first two args must be strings, otherwise its meaningless */
11266     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11267     {
11268 	string_in = NULL;
11269 	if (argvars[2].v_type == VAR_STRING)
11270 	    string_in = argvars[2].vval.v_string;
11271 	if (type == VAR_NUMBER)
11272 	    string_result = NULL;
11273 	else
11274 	    string_result = &rettv->vval.v_string;
11275 	if (mch_libcall(argvars[0].vval.v_string,
11276 			     argvars[1].vval.v_string,
11277 			     string_in,
11278 			     argvars[2].vval.v_number,
11279 			     string_result,
11280 			     &nr_result) == OK
11281 		&& type == VAR_NUMBER)
11282 	    rettv->vval.v_number = nr_result;
11283     }
11284 #endif
11285 }
11286 
11287 /*
11288  * "libcall()" function
11289  */
11290     static void
11291 f_libcall(argvars, rettv)
11292     typval_T	*argvars;
11293     typval_T	*rettv;
11294 {
11295     libcall_common(argvars, rettv, VAR_STRING);
11296 }
11297 
11298 /*
11299  * "libcallnr()" function
11300  */
11301     static void
11302 f_libcallnr(argvars, rettv)
11303     typval_T	*argvars;
11304     typval_T	*rettv;
11305 {
11306     libcall_common(argvars, rettv, VAR_NUMBER);
11307 }
11308 
11309 /*
11310  * "line(string)" function
11311  */
11312     static void
11313 f_line(argvars, rettv)
11314     typval_T	*argvars;
11315     typval_T	*rettv;
11316 {
11317     linenr_T	lnum = 0;
11318     pos_T	*fp;
11319 
11320     fp = var2fpos(&argvars[0], TRUE);
11321     if (fp != NULL)
11322 	lnum = fp->lnum;
11323     rettv->vval.v_number = lnum;
11324 }
11325 
11326 /*
11327  * "line2byte(lnum)" function
11328  */
11329 /*ARGSUSED*/
11330     static void
11331 f_line2byte(argvars, rettv)
11332     typval_T	*argvars;
11333     typval_T	*rettv;
11334 {
11335 #ifndef FEAT_BYTEOFF
11336     rettv->vval.v_number = -1;
11337 #else
11338     linenr_T	lnum;
11339 
11340     lnum = get_tv_lnum(argvars);
11341     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11342 	rettv->vval.v_number = -1;
11343     else
11344 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11345     if (rettv->vval.v_number >= 0)
11346 	++rettv->vval.v_number;
11347 #endif
11348 }
11349 
11350 /*
11351  * "lispindent(lnum)" function
11352  */
11353     static void
11354 f_lispindent(argvars, rettv)
11355     typval_T	*argvars;
11356     typval_T	*rettv;
11357 {
11358 #ifdef FEAT_LISP
11359     pos_T	pos;
11360     linenr_T	lnum;
11361 
11362     pos = curwin->w_cursor;
11363     lnum = get_tv_lnum(argvars);
11364     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11365     {
11366 	curwin->w_cursor.lnum = lnum;
11367 	rettv->vval.v_number = get_lisp_indent();
11368 	curwin->w_cursor = pos;
11369     }
11370     else
11371 #endif
11372 	rettv->vval.v_number = -1;
11373 }
11374 
11375 /*
11376  * "localtime()" function
11377  */
11378 /*ARGSUSED*/
11379     static void
11380 f_localtime(argvars, rettv)
11381     typval_T	*argvars;
11382     typval_T	*rettv;
11383 {
11384     rettv->vval.v_number = (varnumber_T)time(NULL);
11385 }
11386 
11387 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11388 
11389     static void
11390 get_maparg(argvars, rettv, exact)
11391     typval_T	*argvars;
11392     typval_T	*rettv;
11393     int		exact;
11394 {
11395     char_u	*keys;
11396     char_u	*which;
11397     char_u	buf[NUMBUFLEN];
11398     char_u	*keys_buf = NULL;
11399     char_u	*rhs;
11400     int		mode;
11401     garray_T	ga;
11402 
11403     /* return empty string for failure */
11404     rettv->v_type = VAR_STRING;
11405     rettv->vval.v_string = NULL;
11406 
11407     keys = get_tv_string(&argvars[0]);
11408     if (*keys == NUL)
11409 	return;
11410 
11411     if (argvars[1].v_type != VAR_UNKNOWN)
11412 	which = get_tv_string_buf_chk(&argvars[1], buf);
11413     else
11414 	which = (char_u *)"";
11415     if (which == NULL)
11416 	return;
11417 
11418     mode = get_map_mode(&which, 0);
11419 
11420     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11421     rhs = check_map(keys, mode, exact, FALSE);
11422     vim_free(keys_buf);
11423     if (rhs != NULL)
11424     {
11425 	ga_init(&ga);
11426 	ga.ga_itemsize = 1;
11427 	ga.ga_growsize = 40;
11428 
11429 	while (*rhs != NUL)
11430 	    ga_concat(&ga, str2special(&rhs, FALSE));
11431 
11432 	ga_append(&ga, NUL);
11433 	rettv->vval.v_string = (char_u *)ga.ga_data;
11434     }
11435 }
11436 
11437 /*
11438  * "map()" function
11439  */
11440     static void
11441 f_map(argvars, rettv)
11442     typval_T	*argvars;
11443     typval_T	*rettv;
11444 {
11445     filter_map(argvars, rettv, TRUE);
11446 }
11447 
11448 /*
11449  * "maparg()" function
11450  */
11451     static void
11452 f_maparg(argvars, rettv)
11453     typval_T	*argvars;
11454     typval_T	*rettv;
11455 {
11456     get_maparg(argvars, rettv, TRUE);
11457 }
11458 
11459 /*
11460  * "mapcheck()" function
11461  */
11462     static void
11463 f_mapcheck(argvars, rettv)
11464     typval_T	*argvars;
11465     typval_T	*rettv;
11466 {
11467     get_maparg(argvars, rettv, FALSE);
11468 }
11469 
11470 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11471 
11472     static void
11473 find_some_match(argvars, rettv, type)
11474     typval_T	*argvars;
11475     typval_T	*rettv;
11476     int		type;
11477 {
11478     char_u	*str = NULL;
11479     char_u	*expr = NULL;
11480     char_u	*pat;
11481     regmatch_T	regmatch;
11482     char_u	patbuf[NUMBUFLEN];
11483     char_u	strbuf[NUMBUFLEN];
11484     char_u	*save_cpo;
11485     long	start = 0;
11486     long	nth = 1;
11487     int		match = 0;
11488     list_T	*l = NULL;
11489     listitem_T	*li = NULL;
11490     long	idx = 0;
11491     char_u	*tofree = NULL;
11492 
11493     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11494     save_cpo = p_cpo;
11495     p_cpo = (char_u *)"";
11496 
11497     rettv->vval.v_number = -1;
11498     if (type == 3)
11499     {
11500 	/* return empty list when there are no matches */
11501 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11502 	    goto theend;
11503 	rettv->v_type = VAR_LIST;
11504 	++rettv->vval.v_list->lv_refcount;
11505     }
11506     else if (type == 2)
11507     {
11508 	rettv->v_type = VAR_STRING;
11509 	rettv->vval.v_string = NULL;
11510     }
11511 
11512     if (argvars[0].v_type == VAR_LIST)
11513     {
11514 	if ((l = argvars[0].vval.v_list) == NULL)
11515 	    goto theend;
11516 	li = l->lv_first;
11517     }
11518     else
11519 	expr = str = get_tv_string(&argvars[0]);
11520 
11521     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11522     if (pat == NULL)
11523 	goto theend;
11524 
11525     if (argvars[2].v_type != VAR_UNKNOWN)
11526     {
11527 	int	    error = FALSE;
11528 
11529 	start = get_tv_number_chk(&argvars[2], &error);
11530 	if (error)
11531 	    goto theend;
11532 	if (l != NULL)
11533 	{
11534 	    li = list_find(l, start);
11535 	    if (li == NULL)
11536 		goto theend;
11537 	    idx = l->lv_idx;	/* use the cached index */
11538 	}
11539 	else
11540 	{
11541 	    if (start < 0)
11542 		start = 0;
11543 	    if (start > (long)STRLEN(str))
11544 		goto theend;
11545 	    str += start;
11546 	}
11547 
11548 	if (argvars[3].v_type != VAR_UNKNOWN)
11549 	    nth = get_tv_number_chk(&argvars[3], &error);
11550 	if (error)
11551 	    goto theend;
11552     }
11553 
11554     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11555     if (regmatch.regprog != NULL)
11556     {
11557 	regmatch.rm_ic = p_ic;
11558 
11559 	for (;;)
11560 	{
11561 	    if (l != NULL)
11562 	    {
11563 		if (li == NULL)
11564 		{
11565 		    match = FALSE;
11566 		    break;
11567 		}
11568 		vim_free(tofree);
11569 		str = echo_string(&li->li_tv, &tofree, strbuf);
11570 		if (str == NULL)
11571 		    break;
11572 	    }
11573 
11574 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11575 
11576 	    if (match && --nth <= 0)
11577 		break;
11578 	    if (l == NULL && !match)
11579 		break;
11580 
11581 	    /* Advance to just after the match. */
11582 	    if (l != NULL)
11583 	    {
11584 		li = li->li_next;
11585 		++idx;
11586 	    }
11587 	    else
11588 	    {
11589 #ifdef FEAT_MBYTE
11590 		str = regmatch.startp[0] + (*mb_ptr2len)(regmatch.startp[0]);
11591 #else
11592 		str = regmatch.startp[0] + 1;
11593 #endif
11594 	    }
11595 	}
11596 
11597 	if (match)
11598 	{
11599 	    if (type == 3)
11600 	    {
11601 		int i;
11602 
11603 		/* return list with matched string and submatches */
11604 		for (i = 0; i < NSUBEXP; ++i)
11605 		{
11606 		    if (regmatch.endp[i] == NULL)
11607 			break;
11608 		    li = listitem_alloc();
11609 		    if (li == NULL)
11610 			break;
11611 		    li->li_tv.v_type = VAR_STRING;
11612 		    li->li_tv.v_lock = 0;
11613 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11614 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11615 		    list_append(rettv->vval.v_list, li);
11616 		}
11617 	    }
11618 	    else if (type == 2)
11619 	    {
11620 		/* return matched string */
11621 		if (l != NULL)
11622 		    copy_tv(&li->li_tv, rettv);
11623 		else
11624 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11625 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11626 	    }
11627 	    else if (l != NULL)
11628 		rettv->vval.v_number = idx;
11629 	    else
11630 	    {
11631 		if (type != 0)
11632 		    rettv->vval.v_number =
11633 				      (varnumber_T)(regmatch.startp[0] - str);
11634 		else
11635 		    rettv->vval.v_number =
11636 					(varnumber_T)(regmatch.endp[0] - str);
11637 		rettv->vval.v_number += str - expr;
11638 	    }
11639 	}
11640 	vim_free(regmatch.regprog);
11641     }
11642 
11643 theend:
11644     vim_free(tofree);
11645     p_cpo = save_cpo;
11646 }
11647 
11648 /*
11649  * "match()" function
11650  */
11651     static void
11652 f_match(argvars, rettv)
11653     typval_T	*argvars;
11654     typval_T	*rettv;
11655 {
11656     find_some_match(argvars, rettv, 1);
11657 }
11658 
11659 /*
11660  * "matchend()" function
11661  */
11662     static void
11663 f_matchend(argvars, rettv)
11664     typval_T	*argvars;
11665     typval_T	*rettv;
11666 {
11667     find_some_match(argvars, rettv, 0);
11668 }
11669 
11670 /*
11671  * "matchlist()" function
11672  */
11673     static void
11674 f_matchlist(argvars, rettv)
11675     typval_T	*argvars;
11676     typval_T	*rettv;
11677 {
11678     find_some_match(argvars, rettv, 3);
11679 }
11680 
11681 /*
11682  * "matchstr()" function
11683  */
11684     static void
11685 f_matchstr(argvars, rettv)
11686     typval_T	*argvars;
11687     typval_T	*rettv;
11688 {
11689     find_some_match(argvars, rettv, 2);
11690 }
11691 
11692 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11693 
11694     static void
11695 max_min(argvars, rettv, domax)
11696     typval_T	*argvars;
11697     typval_T	*rettv;
11698     int		domax;
11699 {
11700     long	n = 0;
11701     long	i;
11702     int		error = FALSE;
11703 
11704     if (argvars[0].v_type == VAR_LIST)
11705     {
11706 	list_T		*l;
11707 	listitem_T	*li;
11708 
11709 	l = argvars[0].vval.v_list;
11710 	if (l != NULL)
11711 	{
11712 	    li = l->lv_first;
11713 	    if (li != NULL)
11714 	    {
11715 		n = get_tv_number_chk(&li->li_tv, &error);
11716 		for (;;)
11717 		{
11718 		    li = li->li_next;
11719 		    if (li == NULL)
11720 			break;
11721 		    i = get_tv_number_chk(&li->li_tv, &error);
11722 		    if (domax ? i > n : i < n)
11723 			n = i;
11724 		}
11725 	    }
11726 	}
11727     }
11728     else if (argvars[0].v_type == VAR_DICT)
11729     {
11730 	dict_T		*d;
11731 	int		first = TRUE;
11732 	hashitem_T	*hi;
11733 	int		todo;
11734 
11735 	d = argvars[0].vval.v_dict;
11736 	if (d != NULL)
11737 	{
11738 	    todo = d->dv_hashtab.ht_used;
11739 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11740 	    {
11741 		if (!HASHITEM_EMPTY(hi))
11742 		{
11743 		    --todo;
11744 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11745 		    if (first)
11746 		    {
11747 			n = i;
11748 			first = FALSE;
11749 		    }
11750 		    else if (domax ? i > n : i < n)
11751 			n = i;
11752 		}
11753 	    }
11754 	}
11755     }
11756     else
11757 	EMSG(_(e_listdictarg));
11758     rettv->vval.v_number = error ? 0 : n;
11759 }
11760 
11761 /*
11762  * "max()" function
11763  */
11764     static void
11765 f_max(argvars, rettv)
11766     typval_T	*argvars;
11767     typval_T	*rettv;
11768 {
11769     max_min(argvars, rettv, TRUE);
11770 }
11771 
11772 /*
11773  * "min()" function
11774  */
11775     static void
11776 f_min(argvars, rettv)
11777     typval_T	*argvars;
11778     typval_T	*rettv;
11779 {
11780     max_min(argvars, rettv, FALSE);
11781 }
11782 
11783 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11784 
11785 /*
11786  * Create the directory in which "dir" is located, and higher levels when
11787  * needed.
11788  */
11789     static int
11790 mkdir_recurse(dir, prot)
11791     char_u	*dir;
11792     int		prot;
11793 {
11794     char_u	*p;
11795     char_u	*updir;
11796     int		r = FAIL;
11797 
11798     /* Get end of directory name in "dir".
11799      * We're done when it's "/" or "c:/". */
11800     p = gettail_sep(dir);
11801     if (p <= get_past_head(dir))
11802 	return OK;
11803 
11804     /* If the directory exists we're done.  Otherwise: create it.*/
11805     updir = vim_strnsave(dir, (int)(p - dir));
11806     if (updir == NULL)
11807 	return FAIL;
11808     if (mch_isdir(updir))
11809 	r = OK;
11810     else if (mkdir_recurse(updir, prot) == OK)
11811 	r = vim_mkdir_emsg(updir, prot);
11812     vim_free(updir);
11813     return r;
11814 }
11815 
11816 #ifdef vim_mkdir
11817 /*
11818  * "mkdir()" function
11819  */
11820     static void
11821 f_mkdir(argvars, rettv)
11822     typval_T	*argvars;
11823     typval_T	*rettv;
11824 {
11825     char_u	*dir;
11826     char_u	buf[NUMBUFLEN];
11827     int		prot = 0755;
11828 
11829     rettv->vval.v_number = FAIL;
11830     if (check_restricted() || check_secure())
11831 	return;
11832 
11833     dir = get_tv_string_buf(&argvars[0], buf);
11834     if (argvars[1].v_type != VAR_UNKNOWN)
11835     {
11836 	if (argvars[2].v_type != VAR_UNKNOWN)
11837 	    prot = get_tv_number_chk(&argvars[2], NULL);
11838 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11839 	    mkdir_recurse(dir, prot);
11840     }
11841     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11842 }
11843 #endif
11844 
11845 /*
11846  * "mode()" function
11847  */
11848 /*ARGSUSED*/
11849     static void
11850 f_mode(argvars, rettv)
11851     typval_T	*argvars;
11852     typval_T	*rettv;
11853 {
11854     char_u	buf[2];
11855 
11856 #ifdef FEAT_VISUAL
11857     if (VIsual_active)
11858     {
11859 	if (VIsual_select)
11860 	    buf[0] = VIsual_mode + 's' - 'v';
11861 	else
11862 	    buf[0] = VIsual_mode;
11863     }
11864     else
11865 #endif
11866 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11867 	buf[0] = 'r';
11868     else if (State & INSERT)
11869     {
11870 	if (State & REPLACE_FLAG)
11871 	    buf[0] = 'R';
11872 	else
11873 	    buf[0] = 'i';
11874     }
11875     else if (State & CMDLINE)
11876 	buf[0] = 'c';
11877     else
11878 	buf[0] = 'n';
11879 
11880     buf[1] = NUL;
11881     rettv->vval.v_string = vim_strsave(buf);
11882     rettv->v_type = VAR_STRING;
11883 }
11884 
11885 /*
11886  * "nextnonblank()" function
11887  */
11888     static void
11889 f_nextnonblank(argvars, rettv)
11890     typval_T	*argvars;
11891     typval_T	*rettv;
11892 {
11893     linenr_T	lnum;
11894 
11895     for (lnum = get_tv_lnum(argvars); ; ++lnum)
11896     {
11897 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
11898 	{
11899 	    lnum = 0;
11900 	    break;
11901 	}
11902 	if (*skipwhite(ml_get(lnum)) != NUL)
11903 	    break;
11904     }
11905     rettv->vval.v_number = lnum;
11906 }
11907 
11908 /*
11909  * "nr2char()" function
11910  */
11911     static void
11912 f_nr2char(argvars, rettv)
11913     typval_T	*argvars;
11914     typval_T	*rettv;
11915 {
11916     char_u	buf[NUMBUFLEN];
11917 
11918 #ifdef FEAT_MBYTE
11919     if (has_mbyte)
11920 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
11921     else
11922 #endif
11923     {
11924 	buf[0] = (char_u)get_tv_number(&argvars[0]);
11925 	buf[1] = NUL;
11926     }
11927     rettv->v_type = VAR_STRING;
11928     rettv->vval.v_string = vim_strsave(buf);
11929 }
11930 
11931 /*
11932  * "prevnonblank()" function
11933  */
11934     static void
11935 f_prevnonblank(argvars, rettv)
11936     typval_T	*argvars;
11937     typval_T	*rettv;
11938 {
11939     linenr_T	lnum;
11940 
11941     lnum = get_tv_lnum(argvars);
11942     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
11943 	lnum = 0;
11944     else
11945 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
11946 	    --lnum;
11947     rettv->vval.v_number = lnum;
11948 }
11949 
11950 #ifdef HAVE_STDARG_H
11951 /* This dummy va_list is here because:
11952  * - passing a NULL pointer doesn't work when va_list isn't a pointer
11953  * - locally in the function results in a "used before set" warning
11954  * - using va_start() to initialize it gives "function with fixed args" error */
11955 static va_list	ap;
11956 #endif
11957 
11958 /*
11959  * "printf()" function
11960  */
11961     static void
11962 f_printf(argvars, rettv)
11963     typval_T	*argvars;
11964     typval_T	*rettv;
11965 {
11966     rettv->v_type = VAR_STRING;
11967     rettv->vval.v_string = NULL;
11968 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
11969     {
11970 	char_u	buf[NUMBUFLEN];
11971 	int	len;
11972 	char_u	*s;
11973 	int	saved_did_emsg = did_emsg;
11974 	char	*fmt;
11975 
11976 	/* Get the required length, allocate the buffer and do it for real. */
11977 	did_emsg = FALSE;
11978 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
11979 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
11980 	if (!did_emsg)
11981 	{
11982 	    s = alloc(len + 1);
11983 	    if (s != NULL)
11984 	    {
11985 		rettv->vval.v_string = s;
11986 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
11987 	    }
11988 	}
11989 	did_emsg |= saved_did_emsg;
11990     }
11991 #endif
11992 }
11993 
11994 /*
11995  * "range()" function
11996  */
11997     static void
11998 f_range(argvars, rettv)
11999     typval_T	*argvars;
12000     typval_T	*rettv;
12001 {
12002     long	start;
12003     long	end;
12004     long	stride = 1;
12005     long	i;
12006     list_T	*l;
12007     listitem_T	*li;
12008     int		error = FALSE;
12009 
12010     start = get_tv_number_chk(&argvars[0], &error);
12011     if (argvars[1].v_type == VAR_UNKNOWN)
12012     {
12013 	end = start - 1;
12014 	start = 0;
12015     }
12016     else
12017     {
12018 	end = get_tv_number_chk(&argvars[1], &error);
12019 	if (argvars[2].v_type != VAR_UNKNOWN)
12020 	    stride = get_tv_number_chk(&argvars[2], &error);
12021     }
12022 
12023     rettv->vval.v_number = 0;
12024     if (error)
12025 	return;		/* type error; errmsg already given */
12026     if (stride == 0)
12027 	EMSG(_("E726: Stride is zero"));
12028     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12029 	EMSG(_("E727: Start past end"));
12030     else
12031     {
12032 	l = list_alloc();
12033 	if (l != NULL)
12034 	{
12035 	    rettv->v_type = VAR_LIST;
12036 	    rettv->vval.v_list = l;
12037 	    ++l->lv_refcount;
12038 
12039 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12040 	    {
12041 		li = listitem_alloc();
12042 		if (li == NULL)
12043 		    break;
12044 		li->li_tv.v_type = VAR_NUMBER;
12045 		li->li_tv.v_lock = 0;
12046 		li->li_tv.vval.v_number = i;
12047 		list_append(l, li);
12048 	    }
12049 	}
12050     }
12051 }
12052 
12053 /*
12054  * "readfile()" function
12055  */
12056     static void
12057 f_readfile(argvars, rettv)
12058     typval_T	*argvars;
12059     typval_T	*rettv;
12060 {
12061     int		binary = FALSE;
12062     char_u	*fname;
12063     FILE	*fd;
12064     list_T	*l;
12065     listitem_T	*li;
12066 #define FREAD_SIZE 200	    /* optimized for text lines */
12067     char_u	buf[FREAD_SIZE];
12068     int		readlen;    /* size of last fread() */
12069     int		buflen;	    /* nr of valid chars in buf[] */
12070     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12071     int		tolist;	    /* first byte in buf[] still to be put in list */
12072     int		chop;	    /* how many CR to chop off */
12073     char_u	*prev = NULL;	/* previously read bytes, if any */
12074     int		prevlen = 0;    /* length of "prev" if not NULL */
12075     char_u	*s;
12076     int		len;
12077     long	maxline = MAXLNUM;
12078     long	cnt = 0;
12079 
12080     if (argvars[1].v_type != VAR_UNKNOWN)
12081     {
12082 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12083 	    binary = TRUE;
12084 	if (argvars[2].v_type != VAR_UNKNOWN)
12085 	    maxline = get_tv_number(&argvars[2]);
12086     }
12087 
12088     l = list_alloc();
12089     if (l == NULL)
12090 	return;
12091     rettv->v_type = VAR_LIST;
12092     rettv->vval.v_list = l;
12093     l->lv_refcount = 1;
12094 
12095     /* Always open the file in binary mode, library functions have a mind of
12096      * their own about CR-LF conversion. */
12097     fname = get_tv_string(&argvars[0]);
12098     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12099     {
12100 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12101 	return;
12102     }
12103 
12104     filtd = 0;
12105     while (cnt < maxline || maxline < 0)
12106     {
12107 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12108 	buflen = filtd + readlen;
12109 	tolist = 0;
12110 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12111 	{
12112 	    if (buf[filtd] == '\n' || readlen <= 0)
12113 	    {
12114 		/* Only when in binary mode add an empty list item when the
12115 		 * last line ends in a '\n'. */
12116 		if (!binary && readlen == 0 && filtd == 0)
12117 		    break;
12118 
12119 		/* Found end-of-line or end-of-file: add a text line to the
12120 		 * list. */
12121 		chop = 0;
12122 		if (!binary)
12123 		    while (filtd - chop - 1 >= tolist
12124 					  && buf[filtd - chop - 1] == '\r')
12125 			++chop;
12126 		len = filtd - tolist - chop;
12127 		if (prev == NULL)
12128 		    s = vim_strnsave(buf + tolist, len);
12129 		else
12130 		{
12131 		    s = alloc((unsigned)(prevlen + len + 1));
12132 		    if (s != NULL)
12133 		    {
12134 			mch_memmove(s, prev, prevlen);
12135 			vim_free(prev);
12136 			prev = NULL;
12137 			mch_memmove(s + prevlen, buf + tolist, len);
12138 			s[prevlen + len] = NUL;
12139 		    }
12140 		}
12141 		tolist = filtd + 1;
12142 
12143 		li = listitem_alloc();
12144 		if (li == NULL)
12145 		{
12146 		    vim_free(s);
12147 		    break;
12148 		}
12149 		li->li_tv.v_type = VAR_STRING;
12150 		li->li_tv.v_lock = 0;
12151 		li->li_tv.vval.v_string = s;
12152 		list_append(l, li);
12153 
12154 		if (++cnt >= maxline && maxline >= 0)
12155 		    break;
12156 		if (readlen <= 0)
12157 		    break;
12158 	    }
12159 	    else if (buf[filtd] == NUL)
12160 		buf[filtd] = '\n';
12161 	}
12162 	if (readlen <= 0)
12163 	    break;
12164 
12165 	if (tolist == 0)
12166 	{
12167 	    /* "buf" is full, need to move text to an allocated buffer */
12168 	    if (prev == NULL)
12169 	    {
12170 		prev = vim_strnsave(buf, buflen);
12171 		prevlen = buflen;
12172 	    }
12173 	    else
12174 	    {
12175 		s = alloc((unsigned)(prevlen + buflen));
12176 		if (s != NULL)
12177 		{
12178 		    mch_memmove(s, prev, prevlen);
12179 		    mch_memmove(s + prevlen, buf, buflen);
12180 		    vim_free(prev);
12181 		    prev = s;
12182 		    prevlen += buflen;
12183 		}
12184 	    }
12185 	    filtd = 0;
12186 	}
12187 	else
12188 	{
12189 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12190 	    filtd -= tolist;
12191 	}
12192     }
12193 
12194     /*
12195      * For a negative line count use only the lines at the end of the file,
12196      * free the rest.
12197      */
12198     if (maxline < 0)
12199 	while (cnt > -maxline)
12200 	{
12201 	    listitem_remove(l, l->lv_first);
12202 	    --cnt;
12203 	}
12204 
12205     vim_free(prev);
12206     fclose(fd);
12207 }
12208 
12209 
12210 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12211 static void make_connection __ARGS((void));
12212 static int check_connection __ARGS((void));
12213 
12214     static void
12215 make_connection()
12216 {
12217     if (X_DISPLAY == NULL
12218 # ifdef FEAT_GUI
12219 	    && !gui.in_use
12220 # endif
12221 	    )
12222     {
12223 	x_force_connect = TRUE;
12224 	setup_term_clip();
12225 	x_force_connect = FALSE;
12226     }
12227 }
12228 
12229     static int
12230 check_connection()
12231 {
12232     make_connection();
12233     if (X_DISPLAY == NULL)
12234     {
12235 	EMSG(_("E240: No connection to Vim server"));
12236 	return FAIL;
12237     }
12238     return OK;
12239 }
12240 #endif
12241 
12242 #ifdef FEAT_CLIENTSERVER
12243 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12244 
12245     static void
12246 remote_common(argvars, rettv, expr)
12247     typval_T	*argvars;
12248     typval_T	*rettv;
12249     int		expr;
12250 {
12251     char_u	*server_name;
12252     char_u	*keys;
12253     char_u	*r = NULL;
12254     char_u	buf[NUMBUFLEN];
12255 # ifdef WIN32
12256     HWND	w;
12257 # else
12258     Window	w;
12259 # endif
12260 
12261     if (check_restricted() || check_secure())
12262 	return;
12263 
12264 # ifdef FEAT_X11
12265     if (check_connection() == FAIL)
12266 	return;
12267 # endif
12268 
12269     server_name = get_tv_string_chk(&argvars[0]);
12270     if (server_name == NULL)
12271 	return;		/* type error; errmsg already given */
12272     keys = get_tv_string_buf(&argvars[1], buf);
12273 # ifdef WIN32
12274     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12275 # else
12276     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12277 									  < 0)
12278 # endif
12279     {
12280 	if (r != NULL)
12281 	    EMSG(r);		/* sending worked but evaluation failed */
12282 	else
12283 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12284 	return;
12285     }
12286 
12287     rettv->vval.v_string = r;
12288 
12289     if (argvars[2].v_type != VAR_UNKNOWN)
12290     {
12291 	dictitem_T	v;
12292 	char_u		str[30];
12293 	char_u		*idvar;
12294 
12295 	sprintf((char *)str, "0x%x", (unsigned int)w);
12296 	v.di_tv.v_type = VAR_STRING;
12297 	v.di_tv.vval.v_string = vim_strsave(str);
12298 	idvar = get_tv_string_chk(&argvars[2]);
12299 	if (idvar != NULL)
12300 	    set_var(idvar, &v.di_tv, FALSE);
12301 	vim_free(v.di_tv.vval.v_string);
12302     }
12303 }
12304 #endif
12305 
12306 /*
12307  * "remote_expr()" function
12308  */
12309 /*ARGSUSED*/
12310     static void
12311 f_remote_expr(argvars, rettv)
12312     typval_T	*argvars;
12313     typval_T	*rettv;
12314 {
12315     rettv->v_type = VAR_STRING;
12316     rettv->vval.v_string = NULL;
12317 #ifdef FEAT_CLIENTSERVER
12318     remote_common(argvars, rettv, TRUE);
12319 #endif
12320 }
12321 
12322 /*
12323  * "remote_foreground()" function
12324  */
12325 /*ARGSUSED*/
12326     static void
12327 f_remote_foreground(argvars, rettv)
12328     typval_T	*argvars;
12329     typval_T	*rettv;
12330 {
12331     rettv->vval.v_number = 0;
12332 #ifdef FEAT_CLIENTSERVER
12333 # ifdef WIN32
12334     /* On Win32 it's done in this application. */
12335     {
12336 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12337 
12338 	if (server_name != NULL)
12339 	    serverForeground(server_name);
12340     }
12341 # else
12342     /* Send a foreground() expression to the server. */
12343     argvars[1].v_type = VAR_STRING;
12344     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12345     argvars[2].v_type = VAR_UNKNOWN;
12346     remote_common(argvars, rettv, TRUE);
12347     vim_free(argvars[1].vval.v_string);
12348 # endif
12349 #endif
12350 }
12351 
12352 /*ARGSUSED*/
12353     static void
12354 f_remote_peek(argvars, rettv)
12355     typval_T	*argvars;
12356     typval_T	*rettv;
12357 {
12358 #ifdef FEAT_CLIENTSERVER
12359     dictitem_T	v;
12360     char_u	*s = NULL;
12361 # ifdef WIN32
12362     int		n = 0;
12363 # endif
12364     char_u	*serverid;
12365 
12366     if (check_restricted() || check_secure())
12367     {
12368 	rettv->vval.v_number = -1;
12369 	return;
12370     }
12371     serverid = get_tv_string_chk(&argvars[0]);
12372     if (serverid == NULL)
12373     {
12374 	rettv->vval.v_number = -1;
12375 	return;		/* type error; errmsg already given */
12376     }
12377 # ifdef WIN32
12378     sscanf(serverid, "%x", &n);
12379     if (n == 0)
12380 	rettv->vval.v_number = -1;
12381     else
12382     {
12383 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12384 	rettv->vval.v_number = (s != NULL);
12385     }
12386 # else
12387     rettv->vval.v_number = 0;
12388     if (check_connection() == FAIL)
12389 	return;
12390 
12391     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12392 						serverStrToWin(serverid), &s);
12393 # endif
12394 
12395     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12396     {
12397 	char_u		*retvar;
12398 
12399 	v.di_tv.v_type = VAR_STRING;
12400 	v.di_tv.vval.v_string = vim_strsave(s);
12401 	retvar = get_tv_string_chk(&argvars[1]);
12402 	if (retvar != NULL)
12403 	    set_var(retvar, &v.di_tv, FALSE);
12404 	vim_free(v.di_tv.vval.v_string);
12405     }
12406 #else
12407     rettv->vval.v_number = -1;
12408 #endif
12409 }
12410 
12411 /*ARGSUSED*/
12412     static void
12413 f_remote_read(argvars, rettv)
12414     typval_T	*argvars;
12415     typval_T	*rettv;
12416 {
12417     char_u	*r = NULL;
12418 
12419 #ifdef FEAT_CLIENTSERVER
12420     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12421 
12422     if (serverid != NULL && !check_restricted() && !check_secure())
12423     {
12424 # ifdef WIN32
12425 	/* The server's HWND is encoded in the 'id' parameter */
12426 	int		n = 0;
12427 
12428 	sscanf(serverid, "%x", &n);
12429 	if (n != 0)
12430 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12431 	if (r == NULL)
12432 # else
12433 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12434 		serverStrToWin(serverid), &r, FALSE) < 0)
12435 # endif
12436 	    EMSG(_("E277: Unable to read a server reply"));
12437     }
12438 #endif
12439     rettv->v_type = VAR_STRING;
12440     rettv->vval.v_string = r;
12441 }
12442 
12443 /*
12444  * "remote_send()" function
12445  */
12446 /*ARGSUSED*/
12447     static void
12448 f_remote_send(argvars, rettv)
12449     typval_T	*argvars;
12450     typval_T	*rettv;
12451 {
12452     rettv->v_type = VAR_STRING;
12453     rettv->vval.v_string = NULL;
12454 #ifdef FEAT_CLIENTSERVER
12455     remote_common(argvars, rettv, FALSE);
12456 #endif
12457 }
12458 
12459 /*
12460  * "remove()" function
12461  */
12462     static void
12463 f_remove(argvars, rettv)
12464     typval_T	*argvars;
12465     typval_T	*rettv;
12466 {
12467     list_T	*l;
12468     listitem_T	*item, *item2;
12469     listitem_T	*li;
12470     long	idx;
12471     long	end;
12472     char_u	*key;
12473     dict_T	*d;
12474     dictitem_T	*di;
12475 
12476     rettv->vval.v_number = 0;
12477     if (argvars[0].v_type == VAR_DICT)
12478     {
12479 	if (argvars[2].v_type != VAR_UNKNOWN)
12480 	    EMSG2(_(e_toomanyarg), "remove()");
12481 	else if ((d = argvars[0].vval.v_dict) != NULL
12482 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12483 	{
12484 	    key = get_tv_string_chk(&argvars[1]);
12485 	    if (key != NULL)
12486 	    {
12487 		di = dict_find(d, key, -1);
12488 		if (di == NULL)
12489 		    EMSG2(_(e_dictkey), key);
12490 		else
12491 		{
12492 		    *rettv = di->di_tv;
12493 		    init_tv(&di->di_tv);
12494 		    dictitem_remove(d, di);
12495 		}
12496 	    }
12497 	}
12498     }
12499     else if (argvars[0].v_type != VAR_LIST)
12500 	EMSG2(_(e_listdictarg), "remove()");
12501     else if ((l = argvars[0].vval.v_list) != NULL
12502 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12503     {
12504 	int	    error = FALSE;
12505 
12506 	idx = get_tv_number_chk(&argvars[1], &error);
12507 	if (error)
12508 	    ;		/* type error: do nothing, errmsg already given */
12509 	else if ((item = list_find(l, idx)) == NULL)
12510 	    EMSGN(_(e_listidx), idx);
12511 	else
12512 	{
12513 	    if (argvars[2].v_type == VAR_UNKNOWN)
12514 	    {
12515 		/* Remove one item, return its value. */
12516 		list_remove(l, item, item);
12517 		*rettv = item->li_tv;
12518 		vim_free(item);
12519 	    }
12520 	    else
12521 	    {
12522 		/* Remove range of items, return list with values. */
12523 		end = get_tv_number_chk(&argvars[2], &error);
12524 		if (error)
12525 		    ;		/* type error: do nothing */
12526 		else if ((item2 = list_find(l, end)) == NULL)
12527 		    EMSGN(_(e_listidx), end);
12528 		else
12529 		{
12530 		    int	    cnt = 0;
12531 
12532 		    for (li = item; li != NULL; li = li->li_next)
12533 		    {
12534 			++cnt;
12535 			if (li == item2)
12536 			    break;
12537 		    }
12538 		    if (li == NULL)  /* didn't find "item2" after "item" */
12539 			EMSG(_(e_invrange));
12540 		    else
12541 		    {
12542 			list_remove(l, item, item2);
12543 			l = list_alloc();
12544 			if (l != NULL)
12545 			{
12546 			    rettv->v_type = VAR_LIST;
12547 			    rettv->vval.v_list = l;
12548 			    l->lv_first = item;
12549 			    l->lv_last = item2;
12550 			    l->lv_refcount = 1;
12551 			    item->li_prev = NULL;
12552 			    item2->li_next = NULL;
12553 			    l->lv_len = cnt;
12554 			}
12555 		    }
12556 		}
12557 	    }
12558 	}
12559     }
12560 }
12561 
12562 /*
12563  * "rename({from}, {to})" function
12564  */
12565     static void
12566 f_rename(argvars, rettv)
12567     typval_T	*argvars;
12568     typval_T	*rettv;
12569 {
12570     char_u	buf[NUMBUFLEN];
12571 
12572     if (check_restricted() || check_secure())
12573 	rettv->vval.v_number = -1;
12574     else
12575 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12576 				      get_tv_string_buf(&argvars[1], buf));
12577 }
12578 
12579 /*
12580  * "repeat()" function
12581  */
12582 /*ARGSUSED*/
12583     static void
12584 f_repeat(argvars, rettv)
12585     typval_T	*argvars;
12586     typval_T	*rettv;
12587 {
12588     char_u	*p;
12589     int		n;
12590     int		slen;
12591     int		len;
12592     char_u	*r;
12593     int		i;
12594     list_T	*l;
12595 
12596     n = get_tv_number(&argvars[1]);
12597     if (argvars[0].v_type == VAR_LIST)
12598     {
12599 	l = list_alloc();
12600 	if (l != NULL && argvars[0].vval.v_list != NULL)
12601 	{
12602 	    l->lv_refcount = 1;
12603 	    while (n-- > 0)
12604 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12605 		    break;
12606 	}
12607 	rettv->v_type = VAR_LIST;
12608 	rettv->vval.v_list = l;
12609     }
12610     else
12611     {
12612 	p = get_tv_string(&argvars[0]);
12613 	rettv->v_type = VAR_STRING;
12614 	rettv->vval.v_string = NULL;
12615 
12616 	slen = (int)STRLEN(p);
12617 	len = slen * n;
12618 	if (len <= 0)
12619 	    return;
12620 
12621 	r = alloc(len + 1);
12622 	if (r != NULL)
12623 	{
12624 	    for (i = 0; i < n; i++)
12625 		mch_memmove(r + i * slen, p, (size_t)slen);
12626 	    r[len] = NUL;
12627 	}
12628 
12629 	rettv->vval.v_string = r;
12630     }
12631 }
12632 
12633 /*
12634  * "resolve()" function
12635  */
12636     static void
12637 f_resolve(argvars, rettv)
12638     typval_T	*argvars;
12639     typval_T	*rettv;
12640 {
12641     char_u	*p;
12642 
12643     p = get_tv_string(&argvars[0]);
12644 #ifdef FEAT_SHORTCUT
12645     {
12646 	char_u	*v = NULL;
12647 
12648 	v = mch_resolve_shortcut(p);
12649 	if (v != NULL)
12650 	    rettv->vval.v_string = v;
12651 	else
12652 	    rettv->vval.v_string = vim_strsave(p);
12653     }
12654 #else
12655 # ifdef HAVE_READLINK
12656     {
12657 	char_u	buf[MAXPATHL + 1];
12658 	char_u	*cpy;
12659 	int	len;
12660 	char_u	*remain = NULL;
12661 	char_u	*q;
12662 	int	is_relative_to_current = FALSE;
12663 	int	has_trailing_pathsep = FALSE;
12664 	int	limit = 100;
12665 
12666 	p = vim_strsave(p);
12667 
12668 	if (p[0] == '.' && (vim_ispathsep(p[1])
12669 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12670 	    is_relative_to_current = TRUE;
12671 
12672 	len = STRLEN(p);
12673 	if (len > 0 && after_pathsep(p, p + len))
12674 	    has_trailing_pathsep = TRUE;
12675 
12676 	q = getnextcomp(p);
12677 	if (*q != NUL)
12678 	{
12679 	    /* Separate the first path component in "p", and keep the
12680 	     * remainder (beginning with the path separator). */
12681 	    remain = vim_strsave(q - 1);
12682 	    q[-1] = NUL;
12683 	}
12684 
12685 	for (;;)
12686 	{
12687 	    for (;;)
12688 	    {
12689 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12690 		if (len <= 0)
12691 		    break;
12692 		buf[len] = NUL;
12693 
12694 		if (limit-- == 0)
12695 		{
12696 		    vim_free(p);
12697 		    vim_free(remain);
12698 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12699 		    rettv->vval.v_string = NULL;
12700 		    goto fail;
12701 		}
12702 
12703 		/* Ensure that the result will have a trailing path separator
12704 		 * if the argument has one. */
12705 		if (remain == NULL && has_trailing_pathsep)
12706 		    add_pathsep(buf);
12707 
12708 		/* Separate the first path component in the link value and
12709 		 * concatenate the remainders. */
12710 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12711 		if (*q != NUL)
12712 		{
12713 		    if (remain == NULL)
12714 			remain = vim_strsave(q - 1);
12715 		    else
12716 		    {
12717 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12718 			if (cpy != NULL)
12719 			{
12720 			    STRCAT(cpy, remain);
12721 			    vim_free(remain);
12722 			    remain = cpy;
12723 			}
12724 		    }
12725 		    q[-1] = NUL;
12726 		}
12727 
12728 		q = gettail(p);
12729 		if (q > p && *q == NUL)
12730 		{
12731 		    /* Ignore trailing path separator. */
12732 		    q[-1] = NUL;
12733 		    q = gettail(p);
12734 		}
12735 		if (q > p && !mch_isFullName(buf))
12736 		{
12737 		    /* symlink is relative to directory of argument */
12738 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12739 		    if (cpy != NULL)
12740 		    {
12741 			STRCPY(cpy, p);
12742 			STRCPY(gettail(cpy), buf);
12743 			vim_free(p);
12744 			p = cpy;
12745 		    }
12746 		}
12747 		else
12748 		{
12749 		    vim_free(p);
12750 		    p = vim_strsave(buf);
12751 		}
12752 	    }
12753 
12754 	    if (remain == NULL)
12755 		break;
12756 
12757 	    /* Append the first path component of "remain" to "p". */
12758 	    q = getnextcomp(remain + 1);
12759 	    len = q - remain - (*q != NUL);
12760 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12761 	    if (cpy != NULL)
12762 	    {
12763 		STRNCAT(cpy, remain, len);
12764 		vim_free(p);
12765 		p = cpy;
12766 	    }
12767 	    /* Shorten "remain". */
12768 	    if (*q != NUL)
12769 		STRCPY(remain, q - 1);
12770 	    else
12771 	    {
12772 		vim_free(remain);
12773 		remain = NULL;
12774 	    }
12775 	}
12776 
12777 	/* If the result is a relative path name, make it explicitly relative to
12778 	 * the current directory if and only if the argument had this form. */
12779 	if (!vim_ispathsep(*p))
12780 	{
12781 	    if (is_relative_to_current
12782 		    && *p != NUL
12783 		    && !(p[0] == '.'
12784 			&& (p[1] == NUL
12785 			    || vim_ispathsep(p[1])
12786 			    || (p[1] == '.'
12787 				&& (p[2] == NUL
12788 				    || vim_ispathsep(p[2]))))))
12789 	    {
12790 		/* Prepend "./". */
12791 		cpy = concat_str((char_u *)"./", p);
12792 		if (cpy != NULL)
12793 		{
12794 		    vim_free(p);
12795 		    p = cpy;
12796 		}
12797 	    }
12798 	    else if (!is_relative_to_current)
12799 	    {
12800 		/* Strip leading "./". */
12801 		q = p;
12802 		while (q[0] == '.' && vim_ispathsep(q[1]))
12803 		    q += 2;
12804 		if (q > p)
12805 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12806 	    }
12807 	}
12808 
12809 	/* Ensure that the result will have no trailing path separator
12810 	 * if the argument had none.  But keep "/" or "//". */
12811 	if (!has_trailing_pathsep)
12812 	{
12813 	    q = p + STRLEN(p);
12814 	    if (after_pathsep(p, q))
12815 		*gettail_sep(p) = NUL;
12816 	}
12817 
12818 	rettv->vval.v_string = p;
12819     }
12820 # else
12821     rettv->vval.v_string = vim_strsave(p);
12822 # endif
12823 #endif
12824 
12825     simplify_filename(rettv->vval.v_string);
12826 
12827 #ifdef HAVE_READLINK
12828 fail:
12829 #endif
12830     rettv->v_type = VAR_STRING;
12831 }
12832 
12833 /*
12834  * "reverse({list})" function
12835  */
12836     static void
12837 f_reverse(argvars, rettv)
12838     typval_T	*argvars;
12839     typval_T	*rettv;
12840 {
12841     list_T	*l;
12842     listitem_T	*li, *ni;
12843 
12844     rettv->vval.v_number = 0;
12845     if (argvars[0].v_type != VAR_LIST)
12846 	EMSG2(_(e_listarg), "reverse()");
12847     else if ((l = argvars[0].vval.v_list) != NULL
12848 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12849     {
12850 	li = l->lv_last;
12851 	l->lv_first = l->lv_last = NULL;
12852 	l->lv_len = 0;
12853 	while (li != NULL)
12854 	{
12855 	    ni = li->li_prev;
12856 	    list_append(l, li);
12857 	    li = ni;
12858 	}
12859 	rettv->vval.v_list = l;
12860 	rettv->v_type = VAR_LIST;
12861 	++l->lv_refcount;
12862     }
12863 }
12864 
12865 #define SP_NOMOVE	1	/* don't move cursor */
12866 #define SP_REPEAT	2	/* repeat to find outer pair */
12867 #define SP_RETCOUNT	4	/* return matchcount */
12868 #define SP_SETPCMARK	8       /* set previous context mark */
12869 
12870 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12871 
12872 /*
12873  * Get flags for a search function.
12874  * Possibly sets "p_ws".
12875  * Returns BACKWARD, FORWARD or zero (for an error).
12876  */
12877     static int
12878 get_search_arg(varp, flagsp)
12879     typval_T	*varp;
12880     int		*flagsp;
12881 {
12882     int		dir = FORWARD;
12883     char_u	*flags;
12884     char_u	nbuf[NUMBUFLEN];
12885     int		mask;
12886 
12887     if (varp->v_type != VAR_UNKNOWN)
12888     {
12889 	flags = get_tv_string_buf_chk(varp, nbuf);
12890 	if (flags == NULL)
12891 	    return 0;		/* type error; errmsg already given */
12892 	while (*flags != NUL)
12893 	{
12894 	    switch (*flags)
12895 	    {
12896 		case 'b': dir = BACKWARD; break;
12897 		case 'w': p_ws = TRUE; break;
12898 		case 'W': p_ws = FALSE; break;
12899 		default:  mask = 0;
12900 			  if (flagsp != NULL)
12901 			     switch (*flags)
12902 			     {
12903 				 case 'n': mask = SP_NOMOVE; break;
12904 				 case 'r': mask = SP_REPEAT; break;
12905 				 case 'm': mask = SP_RETCOUNT; break;
12906 				 case 's': mask = SP_SETPCMARK; break;
12907 			     }
12908 			  if (mask == 0)
12909 			  {
12910 			      EMSG2(_(e_invarg2), flags);
12911 			      dir = 0;
12912 			  }
12913 			  else
12914 			      *flagsp |= mask;
12915 	    }
12916 	    if (dir == 0)
12917 		break;
12918 	    ++flags;
12919 	}
12920     }
12921     return dir;
12922 }
12923 
12924 /*
12925  * "search()" function
12926  */
12927     static void
12928 f_search(argvars, rettv)
12929     typval_T	*argvars;
12930     typval_T	*rettv;
12931 {
12932     char_u	*pat;
12933     pos_T	pos;
12934     pos_T	save_cursor;
12935     int		save_p_ws = p_ws;
12936     int		dir;
12937     int		flags = 0;
12938 
12939     rettv->vval.v_number = 0;	/* default: FAIL */
12940 
12941     pat = get_tv_string(&argvars[0]);
12942     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
12943     if (dir == 0)
12944 	goto theend;
12945     /*
12946      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
12947      * Check to make sure only those flags are set.
12948      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
12949      * flags cannot be set. Check for that condition also.
12950      */
12951     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
12952 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
12953     {
12954 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12955 	goto theend;
12956     }
12957 
12958     pos = save_cursor = curwin->w_cursor;
12959     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
12960 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
12961     {
12962 	rettv->vval.v_number = pos.lnum;
12963 	if (flags & SP_SETPCMARK)
12964 	    setpcmark();
12965 	curwin->w_cursor = pos;
12966 	/* "/$" will put the cursor after the end of the line, may need to
12967 	 * correct that here */
12968 	check_cursor();
12969     }
12970 
12971     /* If 'n' flag is used: restore cursor position. */
12972     if (flags & SP_NOMOVE)
12973 	curwin->w_cursor = save_cursor;
12974 theend:
12975     p_ws = save_p_ws;
12976 }
12977 
12978 /*
12979  * "searchpair()" function
12980  */
12981     static void
12982 f_searchpair(argvars, rettv)
12983     typval_T	*argvars;
12984     typval_T	*rettv;
12985 {
12986     char_u	*spat, *mpat, *epat;
12987     char_u	*skip;
12988     int		save_p_ws = p_ws;
12989     int		dir;
12990     int		flags = 0;
12991     char_u	nbuf1[NUMBUFLEN];
12992     char_u	nbuf2[NUMBUFLEN];
12993     char_u	nbuf3[NUMBUFLEN];
12994 
12995     rettv->vval.v_number = 0;	/* default: FAIL */
12996 
12997     /* Get the three pattern arguments: start, middle, end. */
12998     spat = get_tv_string_chk(&argvars[0]);
12999     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
13000     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
13001     if (spat == NULL || mpat == NULL || epat == NULL)
13002 	goto theend;	    /* type error */
13003 
13004     /* Handle the optional fourth argument: flags */
13005     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13006     if (dir == 0)
13007 	goto theend;
13008     /*
13009      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13010      */
13011     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
13012     {
13013 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13014 	goto theend;
13015     }
13016 
13017     /* Optional fifth argument: skip expresion */
13018     if (argvars[3].v_type == VAR_UNKNOWN
13019 	    || argvars[4].v_type == VAR_UNKNOWN)
13020 	skip = (char_u *)"";
13021     else
13022 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13023     if (skip == NULL)
13024 	goto theend;	    /* type error */
13025 
13026     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
13027 
13028 theend:
13029     p_ws = save_p_ws;
13030 }
13031 
13032 /*
13033  * Search for a start/middle/end thing.
13034  * Used by searchpair(), see its documentation for the details.
13035  * Returns 0 or -1 for no match,
13036  */
13037     long
13038 do_searchpair(spat, mpat, epat, dir, skip, flags)
13039     char_u	*spat;	    /* start pattern */
13040     char_u	*mpat;	    /* middle pattern */
13041     char_u	*epat;	    /* end pattern */
13042     int		dir;	    /* BACKWARD or FORWARD */
13043     char_u	*skip;	    /* skip expression */
13044     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
13045 {
13046     char_u	*save_cpo;
13047     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13048     long	retval = 0;
13049     pos_T	pos;
13050     pos_T	firstpos;
13051     pos_T	foundpos;
13052     pos_T	save_cursor;
13053     pos_T	save_pos;
13054     int		n;
13055     int		r;
13056     int		nest = 1;
13057     int		err;
13058 
13059     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13060     save_cpo = p_cpo;
13061     p_cpo = (char_u *)"";
13062 
13063     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13064      * start/middle/end (pat3, for the top pair). */
13065     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13066     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13067     if (pat2 == NULL || pat3 == NULL)
13068 	goto theend;
13069     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13070     if (*mpat == NUL)
13071 	STRCPY(pat3, pat2);
13072     else
13073 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13074 							    spat, epat, mpat);
13075 
13076     save_cursor = curwin->w_cursor;
13077     pos = curwin->w_cursor;
13078     firstpos.lnum = 0;
13079     foundpos.lnum = 0;
13080     pat = pat3;
13081     for (;;)
13082     {
13083 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13084 						      SEARCH_KEEP, RE_SEARCH);
13085 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13086 	    /* didn't find it or found the first match again: FAIL */
13087 	    break;
13088 
13089 	if (firstpos.lnum == 0)
13090 	    firstpos = pos;
13091 	if (equalpos(pos, foundpos))
13092 	{
13093 	    /* Found the same position again.  Can happen with a pattern that
13094 	     * has "\zs" at the end and searching backwards.  Advance one
13095 	     * character and try again. */
13096 	    if (dir == BACKWARD)
13097 		decl(&pos);
13098 	    else
13099 		incl(&pos);
13100 	}
13101 	foundpos = pos;
13102 
13103 	/* If the skip pattern matches, ignore this match. */
13104 	if (*skip != NUL)
13105 	{
13106 	    save_pos = curwin->w_cursor;
13107 	    curwin->w_cursor = pos;
13108 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13109 	    curwin->w_cursor = save_pos;
13110 	    if (err)
13111 	    {
13112 		/* Evaluating {skip} caused an error, break here. */
13113 		curwin->w_cursor = save_cursor;
13114 		retval = -1;
13115 		break;
13116 	    }
13117 	    if (r)
13118 		continue;
13119 	}
13120 
13121 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13122 	{
13123 	    /* Found end when searching backwards or start when searching
13124 	     * forward: nested pair. */
13125 	    ++nest;
13126 	    pat = pat2;		/* nested, don't search for middle */
13127 	}
13128 	else
13129 	{
13130 	    /* Found end when searching forward or start when searching
13131 	     * backward: end of (nested) pair; or found middle in outer pair. */
13132 	    if (--nest == 1)
13133 		pat = pat3;	/* outer level, search for middle */
13134 	}
13135 
13136 	if (nest == 0)
13137 	{
13138 	    /* Found the match: return matchcount or line number. */
13139 	    if (flags & SP_RETCOUNT)
13140 		++retval;
13141 	    else
13142 		retval = pos.lnum;
13143 	    if (flags & SP_SETPCMARK)
13144 		setpcmark();
13145 	    curwin->w_cursor = pos;
13146 	    if (!(flags & SP_REPEAT))
13147 		break;
13148 	    nest = 1;	    /* search for next unmatched */
13149 	}
13150     }
13151 
13152     /* If 'n' flag is used or search failed: restore cursor position. */
13153     if ((flags & SP_NOMOVE) || retval == 0)
13154 	curwin->w_cursor = save_cursor;
13155 
13156 theend:
13157     vim_free(pat2);
13158     vim_free(pat3);
13159     p_cpo = save_cpo;
13160 
13161     return retval;
13162 }
13163 
13164 /*ARGSUSED*/
13165     static void
13166 f_server2client(argvars, rettv)
13167     typval_T	*argvars;
13168     typval_T	*rettv;
13169 {
13170 #ifdef FEAT_CLIENTSERVER
13171     char_u	buf[NUMBUFLEN];
13172     char_u	*server = get_tv_string_chk(&argvars[0]);
13173     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13174 
13175     rettv->vval.v_number = -1;
13176     if (server == NULL || reply == NULL)
13177 	return;
13178     if (check_restricted() || check_secure())
13179 	return;
13180 # ifdef FEAT_X11
13181     if (check_connection() == FAIL)
13182 	return;
13183 # endif
13184 
13185     if (serverSendReply(server, reply) < 0)
13186     {
13187 	EMSG(_("E258: Unable to send to client"));
13188 	return;
13189     }
13190     rettv->vval.v_number = 0;
13191 #else
13192     rettv->vval.v_number = -1;
13193 #endif
13194 }
13195 
13196 /*ARGSUSED*/
13197     static void
13198 f_serverlist(argvars, rettv)
13199     typval_T	*argvars;
13200     typval_T	*rettv;
13201 {
13202     char_u	*r = NULL;
13203 
13204 #ifdef FEAT_CLIENTSERVER
13205 # ifdef WIN32
13206     r = serverGetVimNames();
13207 # else
13208     make_connection();
13209     if (X_DISPLAY != NULL)
13210 	r = serverGetVimNames(X_DISPLAY);
13211 # endif
13212 #endif
13213     rettv->v_type = VAR_STRING;
13214     rettv->vval.v_string = r;
13215 }
13216 
13217 /*
13218  * "setbufvar()" function
13219  */
13220 /*ARGSUSED*/
13221     static void
13222 f_setbufvar(argvars, rettv)
13223     typval_T	*argvars;
13224     typval_T	*rettv;
13225 {
13226     buf_T	*buf;
13227 #ifdef FEAT_AUTOCMD
13228     aco_save_T	aco;
13229 #else
13230     buf_T	*save_curbuf;
13231 #endif
13232     char_u	*varname, *bufvarname;
13233     typval_T	*varp;
13234     char_u	nbuf[NUMBUFLEN];
13235 
13236     rettv->vval.v_number = 0;
13237 
13238     if (check_restricted() || check_secure())
13239 	return;
13240     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13241     varname = get_tv_string_chk(&argvars[1]);
13242     buf = get_buf_tv(&argvars[0]);
13243     varp = &argvars[2];
13244 
13245     if (buf != NULL && varname != NULL && varp != NULL)
13246     {
13247 	/* set curbuf to be our buf, temporarily */
13248 #ifdef FEAT_AUTOCMD
13249 	aucmd_prepbuf(&aco, buf);
13250 #else
13251 	save_curbuf = curbuf;
13252 	curbuf = buf;
13253 #endif
13254 
13255 	if (*varname == '&')
13256 	{
13257 	    long	numval;
13258 	    char_u	*strval;
13259 	    int		error = FALSE;
13260 
13261 	    ++varname;
13262 	    numval = get_tv_number_chk(varp, &error);
13263 	    strval = get_tv_string_buf_chk(varp, nbuf);
13264 	    if (!error && strval != NULL)
13265 		set_option_value(varname, numval, strval, OPT_LOCAL);
13266 	}
13267 	else
13268 	{
13269 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13270 	    if (bufvarname != NULL)
13271 	    {
13272 		STRCPY(bufvarname, "b:");
13273 		STRCPY(bufvarname + 2, varname);
13274 		set_var(bufvarname, varp, TRUE);
13275 		vim_free(bufvarname);
13276 	    }
13277 	}
13278 
13279 	/* reset notion of buffer */
13280 #ifdef FEAT_AUTOCMD
13281 	aucmd_restbuf(&aco);
13282 #else
13283 	curbuf = save_curbuf;
13284 #endif
13285     }
13286 }
13287 
13288 /*
13289  * "setcmdpos()" function
13290  */
13291     static void
13292 f_setcmdpos(argvars, rettv)
13293     typval_T	*argvars;
13294     typval_T	*rettv;
13295 {
13296     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13297 
13298     if (pos >= 0)
13299 	rettv->vval.v_number = set_cmdline_pos(pos);
13300 }
13301 
13302 /*
13303  * "setline()" function
13304  */
13305     static void
13306 f_setline(argvars, rettv)
13307     typval_T	*argvars;
13308     typval_T	*rettv;
13309 {
13310     linenr_T	lnum;
13311     char_u	*line = NULL;
13312     list_T	*l = NULL;
13313     listitem_T	*li = NULL;
13314     long	added = 0;
13315     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13316 
13317     lnum = get_tv_lnum(&argvars[0]);
13318     if (argvars[1].v_type == VAR_LIST)
13319     {
13320 	l = argvars[1].vval.v_list;
13321 	li = l->lv_first;
13322     }
13323     else
13324 	line = get_tv_string_chk(&argvars[1]);
13325 
13326     rettv->vval.v_number = 0;		/* OK */
13327     for (;;)
13328     {
13329 	if (l != NULL)
13330 	{
13331 	    /* list argument, get next string */
13332 	    if (li == NULL)
13333 		break;
13334 	    line = get_tv_string_chk(&li->li_tv);
13335 	    li = li->li_next;
13336 	}
13337 
13338 	rettv->vval.v_number = 1;	/* FAIL */
13339 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13340 	    break;
13341 	if (lnum <= curbuf->b_ml.ml_line_count)
13342 	{
13343 	    /* existing line, replace it */
13344 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13345 	    {
13346 		changed_bytes(lnum, 0);
13347 		check_cursor_col();
13348 		rettv->vval.v_number = 0;	/* OK */
13349 	    }
13350 	}
13351 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13352 	{
13353 	    /* lnum is one past the last line, append the line */
13354 	    ++added;
13355 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13356 		rettv->vval.v_number = 0;	/* OK */
13357 	}
13358 
13359 	if (l == NULL)			/* only one string argument */
13360 	    break;
13361 	++lnum;
13362     }
13363 
13364     if (added > 0)
13365 	appended_lines_mark(lcount, added);
13366 }
13367 
13368 /*
13369  * "setqflist()" function
13370  */
13371 /*ARGSUSED*/
13372     static void
13373 f_setqflist(argvars, rettv)
13374     typval_T	*argvars;
13375     typval_T	*rettv;
13376 {
13377     char_u	*act;
13378     int		action = ' ';
13379 
13380     rettv->vval.v_number = -1;
13381 
13382 #ifdef FEAT_QUICKFIX
13383     if (argvars[0].v_type != VAR_LIST)
13384 	EMSG(_(e_listreq));
13385     else
13386     {
13387 	list_T  *l = argvars[0].vval.v_list;
13388 
13389 	if (argvars[1].v_type == VAR_STRING)
13390 	{
13391 	    act = get_tv_string_chk(&argvars[1]);
13392 	    if (act == NULL)
13393 		return;		/* type error; errmsg already given */
13394 	    if (*act == 'a' || *act == 'r')
13395 		action = *act;
13396 	}
13397 
13398 	if (l != NULL && set_errorlist(l, action) == OK)
13399 	    rettv->vval.v_number = 0;
13400     }
13401 #endif
13402 }
13403 
13404 /*
13405  * "setreg()" function
13406  */
13407     static void
13408 f_setreg(argvars, rettv)
13409     typval_T	*argvars;
13410     typval_T	*rettv;
13411 {
13412     int		regname;
13413     char_u	*strregname;
13414     char_u	*stropt;
13415     char_u	*strval;
13416     int		append;
13417     char_u	yank_type;
13418     long	block_len;
13419 
13420     block_len = -1;
13421     yank_type = MAUTO;
13422     append = FALSE;
13423 
13424     strregname = get_tv_string_chk(argvars);
13425     rettv->vval.v_number = 1;		/* FAIL is default */
13426 
13427     if (strregname == NULL)
13428 	return;		/* type error; errmsg already given */
13429     regname = *strregname;
13430     if (regname == 0 || regname == '@')
13431 	regname = '"';
13432     else if (regname == '=')
13433 	return;
13434 
13435     if (argvars[2].v_type != VAR_UNKNOWN)
13436     {
13437 	stropt = get_tv_string_chk(&argvars[2]);
13438 	if (stropt == NULL)
13439 	    return;		/* type error */
13440 	for (; *stropt != NUL; ++stropt)
13441 	    switch (*stropt)
13442 	    {
13443 		case 'a': case 'A':	/* append */
13444 		    append = TRUE;
13445 		    break;
13446 		case 'v': case 'c':	/* character-wise selection */
13447 		    yank_type = MCHAR;
13448 		    break;
13449 		case 'V': case 'l':	/* line-wise selection */
13450 		    yank_type = MLINE;
13451 		    break;
13452 #ifdef FEAT_VISUAL
13453 		case 'b': case Ctrl_V:	/* block-wise selection */
13454 		    yank_type = MBLOCK;
13455 		    if (VIM_ISDIGIT(stropt[1]))
13456 		    {
13457 			++stropt;
13458 			block_len = getdigits(&stropt) - 1;
13459 			--stropt;
13460 		    }
13461 		    break;
13462 #endif
13463 	    }
13464     }
13465 
13466     strval = get_tv_string_chk(&argvars[1]);
13467     if (strval != NULL)
13468 	write_reg_contents_ex(regname, strval, -1,
13469 						append, yank_type, block_len);
13470     rettv->vval.v_number = 0;
13471 }
13472 
13473 
13474 /*
13475  * "setwinvar(expr)" function
13476  */
13477 /*ARGSUSED*/
13478     static void
13479 f_setwinvar(argvars, rettv)
13480     typval_T	*argvars;
13481     typval_T	*rettv;
13482 {
13483     win_T	*win;
13484 #ifdef FEAT_WINDOWS
13485     win_T	*save_curwin;
13486 #endif
13487     char_u	*varname, *winvarname;
13488     typval_T	*varp;
13489     char_u	nbuf[NUMBUFLEN];
13490 
13491     rettv->vval.v_number = 0;
13492 
13493     if (check_restricted() || check_secure())
13494 	return;
13495     win = find_win_by_nr(&argvars[0]);
13496     varname = get_tv_string_chk(&argvars[1]);
13497     varp = &argvars[2];
13498 
13499     if (win != NULL && varname != NULL && varp != NULL)
13500     {
13501 #ifdef FEAT_WINDOWS
13502 	/* set curwin to be our win, temporarily */
13503 	save_curwin = curwin;
13504 	curwin = win;
13505 	curbuf = curwin->w_buffer;
13506 #endif
13507 
13508 	if (*varname == '&')
13509 	{
13510 	    long	numval;
13511 	    char_u	*strval;
13512 	    int		error = FALSE;
13513 
13514 	    ++varname;
13515 	    numval = get_tv_number_chk(varp, &error);
13516 	    strval = get_tv_string_buf_chk(varp, nbuf);
13517 	    if (!error && strval != NULL)
13518 		set_option_value(varname, numval, strval, OPT_LOCAL);
13519 	}
13520 	else
13521 	{
13522 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13523 	    if (winvarname != NULL)
13524 	    {
13525 		STRCPY(winvarname, "w:");
13526 		STRCPY(winvarname + 2, varname);
13527 		set_var(winvarname, varp, TRUE);
13528 		vim_free(winvarname);
13529 	    }
13530 	}
13531 
13532 #ifdef FEAT_WINDOWS
13533 	/* Restore current window, if it's still valid (autocomands can make
13534 	 * it invalid). */
13535 	if (win_valid(save_curwin))
13536 	{
13537 	    curwin = save_curwin;
13538 	    curbuf = curwin->w_buffer;
13539 	}
13540 #endif
13541     }
13542 }
13543 
13544 /*
13545  * "simplify()" function
13546  */
13547     static void
13548 f_simplify(argvars, rettv)
13549     typval_T	*argvars;
13550     typval_T	*rettv;
13551 {
13552     char_u	*p;
13553 
13554     p = get_tv_string(&argvars[0]);
13555     rettv->vval.v_string = vim_strsave(p);
13556     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13557     rettv->v_type = VAR_STRING;
13558 }
13559 
13560 static int
13561 #ifdef __BORLANDC__
13562     _RTLENTRYF
13563 #endif
13564 	item_compare __ARGS((const void *s1, const void *s2));
13565 static int
13566 #ifdef __BORLANDC__
13567     _RTLENTRYF
13568 #endif
13569 	item_compare2 __ARGS((const void *s1, const void *s2));
13570 
13571 static int	item_compare_ic;
13572 static char_u	*item_compare_func;
13573 static int	item_compare_func_err;
13574 #define ITEM_COMPARE_FAIL 999
13575 
13576 /*
13577  * Compare functions for f_sort() below.
13578  */
13579     static int
13580 #ifdef __BORLANDC__
13581 _RTLENTRYF
13582 #endif
13583 item_compare(s1, s2)
13584     const void	*s1;
13585     const void	*s2;
13586 {
13587     char_u	*p1, *p2;
13588     char_u	*tofree1, *tofree2;
13589     int		res;
13590     char_u	numbuf1[NUMBUFLEN];
13591     char_u	numbuf2[NUMBUFLEN];
13592 
13593     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13594     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13595     if (item_compare_ic)
13596 	res = STRICMP(p1, p2);
13597     else
13598 	res = STRCMP(p1, p2);
13599     vim_free(tofree1);
13600     vim_free(tofree2);
13601     return res;
13602 }
13603 
13604     static int
13605 #ifdef __BORLANDC__
13606 _RTLENTRYF
13607 #endif
13608 item_compare2(s1, s2)
13609     const void	*s1;
13610     const void	*s2;
13611 {
13612     int		res;
13613     typval_T	rettv;
13614     typval_T	argv[2];
13615     int		dummy;
13616 
13617     /* shortcut after failure in previous call; compare all items equal */
13618     if (item_compare_func_err)
13619 	return 0;
13620 
13621     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13622      * in the copy without changing the original list items. */
13623     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13624     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13625 
13626     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13627     res = call_func(item_compare_func, STRLEN(item_compare_func),
13628 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13629     clear_tv(&argv[0]);
13630     clear_tv(&argv[1]);
13631 
13632     if (res == FAIL)
13633 	res = ITEM_COMPARE_FAIL;
13634     else
13635 	/* return value has wrong type */
13636 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13637     if (item_compare_func_err)
13638 	res = ITEM_COMPARE_FAIL;
13639     clear_tv(&rettv);
13640     return res;
13641 }
13642 
13643 /*
13644  * "sort({list})" function
13645  */
13646     static void
13647 f_sort(argvars, rettv)
13648     typval_T	*argvars;
13649     typval_T	*rettv;
13650 {
13651     list_T	*l;
13652     listitem_T	*li;
13653     listitem_T	**ptrs;
13654     long	len;
13655     long	i;
13656 
13657     rettv->vval.v_number = 0;
13658     if (argvars[0].v_type != VAR_LIST)
13659 	EMSG2(_(e_listarg), "sort()");
13660     else
13661     {
13662 	l = argvars[0].vval.v_list;
13663 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13664 	    return;
13665 	rettv->vval.v_list = l;
13666 	rettv->v_type = VAR_LIST;
13667 	++l->lv_refcount;
13668 
13669 	len = list_len(l);
13670 	if (len <= 1)
13671 	    return;	/* short list sorts pretty quickly */
13672 
13673 	item_compare_ic = FALSE;
13674 	item_compare_func = NULL;
13675 	if (argvars[1].v_type != VAR_UNKNOWN)
13676 	{
13677 	    if (argvars[1].v_type == VAR_FUNC)
13678 		item_compare_func = argvars[1].vval.v_string;
13679 	    else
13680 	    {
13681 		int	    error = FALSE;
13682 
13683 		i = get_tv_number_chk(&argvars[1], &error);
13684 		if (error)
13685 		    return;		/* type error; errmsg already given */
13686 		if (i == 1)
13687 		    item_compare_ic = TRUE;
13688 		else
13689 		    item_compare_func = get_tv_string(&argvars[1]);
13690 	    }
13691 	}
13692 
13693 	/* Make an array with each entry pointing to an item in the List. */
13694 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13695 	if (ptrs == NULL)
13696 	    return;
13697 	i = 0;
13698 	for (li = l->lv_first; li != NULL; li = li->li_next)
13699 	    ptrs[i++] = li;
13700 
13701 	item_compare_func_err = FALSE;
13702 	/* test the compare function */
13703 	if (item_compare_func != NULL
13704 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13705 							 == ITEM_COMPARE_FAIL)
13706 	    EMSG(_("E702: Sort compare function failed"));
13707 	else
13708 	{
13709 	    /* Sort the array with item pointers. */
13710 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13711 		    item_compare_func == NULL ? item_compare : item_compare2);
13712 
13713 	    if (!item_compare_func_err)
13714 	    {
13715 		/* Clear the List and append the items in the sorted order. */
13716 		l->lv_first = l->lv_last = NULL;
13717 		l->lv_len = 0;
13718 		for (i = 0; i < len; ++i)
13719 		    list_append(l, ptrs[i]);
13720 	    }
13721 	}
13722 
13723 	vim_free(ptrs);
13724     }
13725 }
13726 
13727 /*
13728  * "soundfold({word})" function
13729  */
13730     static void
13731 f_soundfold(argvars, rettv)
13732     typval_T	*argvars;
13733     typval_T	*rettv;
13734 {
13735     char_u	*s;
13736 
13737     rettv->v_type = VAR_STRING;
13738     s = get_tv_string(&argvars[0]);
13739 #ifdef FEAT_SYN_HL
13740     rettv->vval.v_string = eval_soundfold(s);
13741 #else
13742     rettv->vval.v_string = vim_strsave(s);
13743 #endif
13744 }
13745 
13746 /*
13747  * "spellbadword()" function
13748  */
13749 /* ARGSUSED */
13750     static void
13751 f_spellbadword(argvars, rettv)
13752     typval_T	*argvars;
13753     typval_T	*rettv;
13754 {
13755     int		len;
13756 
13757     rettv->vval.v_string = NULL;
13758     rettv->v_type = VAR_STRING;
13759 
13760 #ifdef FEAT_SYN_HL
13761     /* Find the start and length of the badly spelled word. */
13762     len = spell_move_to(curwin, FORWARD, TRUE, TRUE, NULL);
13763     if (len != 0)
13764 	rettv->vval.v_string = vim_strnsave(ml_get_cursor(), len);
13765 #endif
13766 }
13767 
13768 /*
13769  * "spellsuggest()" function
13770  */
13771     static void
13772 f_spellsuggest(argvars, rettv)
13773     typval_T	*argvars;
13774     typval_T	*rettv;
13775 {
13776     char_u	*str;
13777     int		maxcount;
13778     garray_T	ga;
13779     list_T	*l;
13780     listitem_T	*li;
13781     int		i;
13782 
13783     l = list_alloc();
13784     if (l == NULL)
13785 	return;
13786     rettv->v_type = VAR_LIST;
13787     rettv->vval.v_list = l;
13788     ++l->lv_refcount;
13789 
13790 #ifdef FEAT_SYN_HL
13791     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13792     {
13793 	str = get_tv_string(&argvars[0]);
13794 	if (argvars[1].v_type != VAR_UNKNOWN)
13795 	{
13796 	    maxcount = get_tv_number(&argvars[1]);
13797 	    if (maxcount <= 0)
13798 		return;
13799 	}
13800 	else
13801 	    maxcount = 25;
13802 
13803 	spell_suggest_list(&ga, str, maxcount, FALSE);
13804 
13805 	for (i = 0; i < ga.ga_len; ++i)
13806 	{
13807 	    str = ((char_u **)ga.ga_data)[i];
13808 
13809 	    li = listitem_alloc();
13810 	    if (li == NULL)
13811 		vim_free(str);
13812 	    else
13813 	    {
13814 		li->li_tv.v_type = VAR_STRING;
13815 		li->li_tv.v_lock = 0;
13816 		li->li_tv.vval.v_string = str;
13817 		list_append(l, li);
13818 	    }
13819 	}
13820 	ga_clear(&ga);
13821     }
13822 #endif
13823 }
13824 
13825     static void
13826 f_split(argvars, rettv)
13827     typval_T	*argvars;
13828     typval_T	*rettv;
13829 {
13830     char_u	*str;
13831     char_u	*end;
13832     char_u	*pat = NULL;
13833     regmatch_T	regmatch;
13834     char_u	patbuf[NUMBUFLEN];
13835     char_u	*save_cpo;
13836     int		match;
13837     listitem_T	*ni;
13838     list_T	*l;
13839     colnr_T	col = 0;
13840     int		keepempty = FALSE;
13841     int		typeerr = FALSE;
13842 
13843     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13844     save_cpo = p_cpo;
13845     p_cpo = (char_u *)"";
13846 
13847     str = get_tv_string(&argvars[0]);
13848     if (argvars[1].v_type != VAR_UNKNOWN)
13849     {
13850 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13851 	if (pat == NULL)
13852 	    typeerr = TRUE;
13853 	if (argvars[2].v_type != VAR_UNKNOWN)
13854 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13855     }
13856     if (pat == NULL || *pat == NUL)
13857 	pat = (char_u *)"[\\x01- ]\\+";
13858 
13859     l = list_alloc();
13860     if (l == NULL)
13861 	return;
13862     rettv->v_type = VAR_LIST;
13863     rettv->vval.v_list = l;
13864     ++l->lv_refcount;
13865     if (typeerr)
13866 	return;
13867 
13868     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
13869     if (regmatch.regprog != NULL)
13870     {
13871 	regmatch.rm_ic = FALSE;
13872 	while (*str != NUL || keepempty)
13873 	{
13874 	    if (*str == NUL)
13875 		match = FALSE;	/* empty item at the end */
13876 	    else
13877 		match = vim_regexec_nl(&regmatch, str, col);
13878 	    if (match)
13879 		end = regmatch.startp[0];
13880 	    else
13881 		end = str + STRLEN(str);
13882 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
13883 					  && match && end < regmatch.endp[0]))
13884 	    {
13885 		ni = listitem_alloc();
13886 		if (ni == NULL)
13887 		    break;
13888 		ni->li_tv.v_type = VAR_STRING;
13889 		ni->li_tv.v_lock = 0;
13890 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
13891 		list_append(l, ni);
13892 	    }
13893 	    if (!match)
13894 		break;
13895 	    /* Advance to just after the match. */
13896 	    if (regmatch.endp[0] > str)
13897 		col = 0;
13898 	    else
13899 	    {
13900 		/* Don't get stuck at the same match. */
13901 #ifdef FEAT_MBYTE
13902 		col = (*mb_ptr2len)(regmatch.endp[0]);
13903 #else
13904 		col = 1;
13905 #endif
13906 	    }
13907 	    str = regmatch.endp[0];
13908 	}
13909 
13910 	vim_free(regmatch.regprog);
13911     }
13912 
13913     p_cpo = save_cpo;
13914 }
13915 
13916 #ifdef HAVE_STRFTIME
13917 /*
13918  * "strftime({format}[, {time}])" function
13919  */
13920     static void
13921 f_strftime(argvars, rettv)
13922     typval_T	*argvars;
13923     typval_T	*rettv;
13924 {
13925     char_u	result_buf[256];
13926     struct tm	*curtime;
13927     time_t	seconds;
13928     char_u	*p;
13929 
13930     rettv->v_type = VAR_STRING;
13931 
13932     p = get_tv_string(&argvars[0]);
13933     if (argvars[1].v_type == VAR_UNKNOWN)
13934 	seconds = time(NULL);
13935     else
13936 	seconds = (time_t)get_tv_number(&argvars[1]);
13937     curtime = localtime(&seconds);
13938     /* MSVC returns NULL for an invalid value of seconds. */
13939     if (curtime == NULL)
13940 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
13941     else
13942     {
13943 # ifdef FEAT_MBYTE
13944 	vimconv_T   conv;
13945 	char_u	    *enc;
13946 
13947 	conv.vc_type = CONV_NONE;
13948 	enc = enc_locale();
13949 	convert_setup(&conv, p_enc, enc);
13950 	if (conv.vc_type != CONV_NONE)
13951 	    p = string_convert(&conv, p, NULL);
13952 # endif
13953 	if (p != NULL)
13954 	    (void)strftime((char *)result_buf, sizeof(result_buf),
13955 							  (char *)p, curtime);
13956 	else
13957 	    result_buf[0] = NUL;
13958 
13959 # ifdef FEAT_MBYTE
13960 	if (conv.vc_type != CONV_NONE)
13961 	    vim_free(p);
13962 	convert_setup(&conv, enc, p_enc);
13963 	if (conv.vc_type != CONV_NONE)
13964 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
13965 	else
13966 # endif
13967 	    rettv->vval.v_string = vim_strsave(result_buf);
13968 
13969 # ifdef FEAT_MBYTE
13970 	/* Release conversion descriptors */
13971 	convert_setup(&conv, NULL, NULL);
13972 	vim_free(enc);
13973 # endif
13974     }
13975 }
13976 #endif
13977 
13978 /*
13979  * "stridx()" function
13980  */
13981     static void
13982 f_stridx(argvars, rettv)
13983     typval_T	*argvars;
13984     typval_T	*rettv;
13985 {
13986     char_u	buf[NUMBUFLEN];
13987     char_u	*needle;
13988     char_u	*haystack;
13989     char_u	*save_haystack;
13990     char_u	*pos;
13991     int		start_idx;
13992 
13993     needle = get_tv_string_chk(&argvars[1]);
13994     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
13995     rettv->vval.v_number = -1;
13996     if (needle == NULL || haystack == NULL)
13997 	return;		/* type error; errmsg already given */
13998 
13999     if (argvars[2].v_type != VAR_UNKNOWN)
14000     {
14001 	int	    error = FALSE;
14002 
14003 	start_idx = get_tv_number_chk(&argvars[2], &error);
14004 	if (error || start_idx >= (int)STRLEN(haystack))
14005 	    return;
14006 	if (start_idx >= 0)
14007 	    haystack += start_idx;
14008     }
14009 
14010     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14011     if (pos != NULL)
14012 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14013 }
14014 
14015 /*
14016  * "string()" function
14017  */
14018     static void
14019 f_string(argvars, rettv)
14020     typval_T	*argvars;
14021     typval_T	*rettv;
14022 {
14023     char_u	*tofree;
14024     char_u	numbuf[NUMBUFLEN];
14025 
14026     rettv->v_type = VAR_STRING;
14027     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
14028     if (tofree == NULL)
14029 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14030 }
14031 
14032 /*
14033  * "strlen()" function
14034  */
14035     static void
14036 f_strlen(argvars, rettv)
14037     typval_T	*argvars;
14038     typval_T	*rettv;
14039 {
14040     rettv->vval.v_number = (varnumber_T)(STRLEN(
14041 					      get_tv_string(&argvars[0])));
14042 }
14043 
14044 /*
14045  * "strpart()" function
14046  */
14047     static void
14048 f_strpart(argvars, rettv)
14049     typval_T	*argvars;
14050     typval_T	*rettv;
14051 {
14052     char_u	*p;
14053     int		n;
14054     int		len;
14055     int		slen;
14056     int		error = FALSE;
14057 
14058     p = get_tv_string(&argvars[0]);
14059     slen = (int)STRLEN(p);
14060 
14061     n = get_tv_number_chk(&argvars[1], &error);
14062     if (error)
14063 	len = 0;
14064     else if (argvars[2].v_type != VAR_UNKNOWN)
14065 	len = get_tv_number(&argvars[2]);
14066     else
14067 	len = slen - n;	    /* default len: all bytes that are available. */
14068 
14069     /*
14070      * Only return the overlap between the specified part and the actual
14071      * string.
14072      */
14073     if (n < 0)
14074     {
14075 	len += n;
14076 	n = 0;
14077     }
14078     else if (n > slen)
14079 	n = slen;
14080     if (len < 0)
14081 	len = 0;
14082     else if (n + len > slen)
14083 	len = slen - n;
14084 
14085     rettv->v_type = VAR_STRING;
14086     rettv->vval.v_string = vim_strnsave(p + n, len);
14087 }
14088 
14089 /*
14090  * "strridx()" function
14091  */
14092     static void
14093 f_strridx(argvars, rettv)
14094     typval_T	*argvars;
14095     typval_T	*rettv;
14096 {
14097     char_u	buf[NUMBUFLEN];
14098     char_u	*needle;
14099     char_u	*haystack;
14100     char_u	*rest;
14101     char_u	*lastmatch = NULL;
14102     int		haystack_len, end_idx;
14103 
14104     needle = get_tv_string_chk(&argvars[1]);
14105     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14106     haystack_len = STRLEN(haystack);
14107 
14108     rettv->vval.v_number = -1;
14109     if (needle == NULL || haystack == NULL)
14110 	return;		/* type error; errmsg already given */
14111     if (argvars[2].v_type != VAR_UNKNOWN)
14112     {
14113 	/* Third argument: upper limit for index */
14114 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14115 	if (end_idx < 0)
14116 	    return;	/* can never find a match */
14117     }
14118     else
14119 	end_idx = haystack_len;
14120 
14121     if (*needle == NUL)
14122     {
14123 	/* Empty string matches past the end. */
14124 	lastmatch = haystack + end_idx;
14125     }
14126     else
14127     {
14128 	for (rest = haystack; *rest != '\0'; ++rest)
14129 	{
14130 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14131 	    if (rest == NULL || rest > haystack + end_idx)
14132 		break;
14133 	    lastmatch = rest;
14134 	}
14135     }
14136 
14137     if (lastmatch == NULL)
14138 	rettv->vval.v_number = -1;
14139     else
14140 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14141 }
14142 
14143 /*
14144  * "strtrans()" function
14145  */
14146     static void
14147 f_strtrans(argvars, rettv)
14148     typval_T	*argvars;
14149     typval_T	*rettv;
14150 {
14151     rettv->v_type = VAR_STRING;
14152     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14153 }
14154 
14155 /*
14156  * "submatch()" function
14157  */
14158     static void
14159 f_submatch(argvars, rettv)
14160     typval_T	*argvars;
14161     typval_T	*rettv;
14162 {
14163     rettv->v_type = VAR_STRING;
14164     rettv->vval.v_string =
14165 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14166 }
14167 
14168 /*
14169  * "substitute()" function
14170  */
14171     static void
14172 f_substitute(argvars, rettv)
14173     typval_T	*argvars;
14174     typval_T	*rettv;
14175 {
14176     char_u	patbuf[NUMBUFLEN];
14177     char_u	subbuf[NUMBUFLEN];
14178     char_u	flagsbuf[NUMBUFLEN];
14179 
14180     char_u	*str = get_tv_string_chk(&argvars[0]);
14181     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14182     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14183     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14184 
14185     rettv->v_type = VAR_STRING;
14186     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14187 	rettv->vval.v_string = NULL;
14188     else
14189 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14190 }
14191 
14192 /*
14193  * "synID(lnum, col, trans)" function
14194  */
14195 /*ARGSUSED*/
14196     static void
14197 f_synID(argvars, rettv)
14198     typval_T	*argvars;
14199     typval_T	*rettv;
14200 {
14201     int		id = 0;
14202 #ifdef FEAT_SYN_HL
14203     long	lnum;
14204     long	col;
14205     int		trans;
14206     int		transerr = FALSE;
14207 
14208     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14209     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14210     trans = get_tv_number_chk(&argvars[2], &transerr);
14211 
14212     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14213 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14214 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
14215 #endif
14216 
14217     rettv->vval.v_number = id;
14218 }
14219 
14220 /*
14221  * "synIDattr(id, what [, mode])" function
14222  */
14223 /*ARGSUSED*/
14224     static void
14225 f_synIDattr(argvars, rettv)
14226     typval_T	*argvars;
14227     typval_T	*rettv;
14228 {
14229     char_u	*p = NULL;
14230 #ifdef FEAT_SYN_HL
14231     int		id;
14232     char_u	*what;
14233     char_u	*mode;
14234     char_u	modebuf[NUMBUFLEN];
14235     int		modec;
14236 
14237     id = get_tv_number(&argvars[0]);
14238     what = get_tv_string(&argvars[1]);
14239     if (argvars[2].v_type != VAR_UNKNOWN)
14240     {
14241 	mode = get_tv_string_buf(&argvars[2], modebuf);
14242 	modec = TOLOWER_ASC(mode[0]);
14243 	if (modec != 't' && modec != 'c'
14244 #ifdef FEAT_GUI
14245 		&& modec != 'g'
14246 #endif
14247 		)
14248 	    modec = 0;	/* replace invalid with current */
14249     }
14250     else
14251     {
14252 #ifdef FEAT_GUI
14253 	if (gui.in_use)
14254 	    modec = 'g';
14255 	else
14256 #endif
14257 	    if (t_colors > 1)
14258 	    modec = 'c';
14259 	else
14260 	    modec = 't';
14261     }
14262 
14263 
14264     switch (TOLOWER_ASC(what[0]))
14265     {
14266 	case 'b':
14267 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14268 		    p = highlight_color(id, what, modec);
14269 		else					/* bold */
14270 		    p = highlight_has_attr(id, HL_BOLD, modec);
14271 		break;
14272 
14273 	case 'f':					/* fg[#] */
14274 		p = highlight_color(id, what, modec);
14275 		break;
14276 
14277 	case 'i':
14278 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14279 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14280 		else					/* italic */
14281 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14282 		break;
14283 
14284 	case 'n':					/* name */
14285 		p = get_highlight_name(NULL, id - 1);
14286 		break;
14287 
14288 	case 'r':					/* reverse */
14289 		p = highlight_has_attr(id, HL_INVERSE, modec);
14290 		break;
14291 
14292 	case 's':					/* standout */
14293 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14294 		break;
14295 
14296 	case 'u':
14297 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14298 							/* underline */
14299 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14300 		else
14301 							/* undercurl */
14302 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14303 		break;
14304     }
14305 
14306     if (p != NULL)
14307 	p = vim_strsave(p);
14308 #endif
14309     rettv->v_type = VAR_STRING;
14310     rettv->vval.v_string = p;
14311 }
14312 
14313 /*
14314  * "synIDtrans(id)" function
14315  */
14316 /*ARGSUSED*/
14317     static void
14318 f_synIDtrans(argvars, rettv)
14319     typval_T	*argvars;
14320     typval_T	*rettv;
14321 {
14322     int		id;
14323 
14324 #ifdef FEAT_SYN_HL
14325     id = get_tv_number(&argvars[0]);
14326 
14327     if (id > 0)
14328 	id = syn_get_final_id(id);
14329     else
14330 #endif
14331 	id = 0;
14332 
14333     rettv->vval.v_number = id;
14334 }
14335 
14336 /*
14337  * "system()" function
14338  */
14339     static void
14340 f_system(argvars, rettv)
14341     typval_T	*argvars;
14342     typval_T	*rettv;
14343 {
14344     char_u	*res = NULL;
14345     char_u	*p;
14346     char_u	*infile = NULL;
14347     char_u	buf[NUMBUFLEN];
14348     int		err = FALSE;
14349     FILE	*fd;
14350 
14351     if (argvars[1].v_type != VAR_UNKNOWN)
14352     {
14353 	/*
14354 	 * Write the string to a temp file, to be used for input of the shell
14355 	 * command.
14356 	 */
14357 	if ((infile = vim_tempname('i')) == NULL)
14358 	{
14359 	    EMSG(_(e_notmp));
14360 	    return;
14361 	}
14362 
14363 	fd = mch_fopen((char *)infile, WRITEBIN);
14364 	if (fd == NULL)
14365 	{
14366 	    EMSG2(_(e_notopen), infile);
14367 	    goto done;
14368 	}
14369 	p = get_tv_string_buf_chk(&argvars[1], buf);
14370 	if (p == NULL)
14371 	    goto done;		/* type error; errmsg already given */
14372 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14373 	    err = TRUE;
14374 	if (fclose(fd) != 0)
14375 	    err = TRUE;
14376 	if (err)
14377 	{
14378 	    EMSG(_("E677: Error writing temp file"));
14379 	    goto done;
14380 	}
14381     }
14382 
14383     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14384 
14385 #ifdef USE_CR
14386     /* translate <CR> into <NL> */
14387     if (res != NULL)
14388     {
14389 	char_u	*s;
14390 
14391 	for (s = res; *s; ++s)
14392 	{
14393 	    if (*s == CAR)
14394 		*s = NL;
14395 	}
14396     }
14397 #else
14398 # ifdef USE_CRNL
14399     /* translate <CR><NL> into <NL> */
14400     if (res != NULL)
14401     {
14402 	char_u	*s, *d;
14403 
14404 	d = res;
14405 	for (s = res; *s; ++s)
14406 	{
14407 	    if (s[0] == CAR && s[1] == NL)
14408 		++s;
14409 	    *d++ = *s;
14410 	}
14411 	*d = NUL;
14412     }
14413 # endif
14414 #endif
14415 
14416 done:
14417     if (infile != NULL)
14418     {
14419 	mch_remove(infile);
14420 	vim_free(infile);
14421     }
14422     rettv->v_type = VAR_STRING;
14423     rettv->vval.v_string = res;
14424 }
14425 
14426 /*
14427  * "taglist()" function
14428  */
14429     static void
14430 f_taglist(argvars, rettv)
14431     typval_T  *argvars;
14432     typval_T  *rettv;
14433 {
14434     char_u  *tag_pattern;
14435     list_T  *l;
14436 
14437     tag_pattern = get_tv_string(&argvars[0]);
14438 
14439     rettv->vval.v_number = FALSE;
14440     if (*tag_pattern == NUL)
14441 	return;
14442 
14443     l = list_alloc();
14444     if (l != NULL)
14445     {
14446 	if (get_tags(l, tag_pattern) != FAIL)
14447 	{
14448 	    rettv->vval.v_list = l;
14449 	    rettv->v_type = VAR_LIST;
14450 	    ++l->lv_refcount;
14451 	}
14452 	else
14453 	    list_free(l);
14454     }
14455 }
14456 
14457 /*
14458  * "tempname()" function
14459  */
14460 /*ARGSUSED*/
14461     static void
14462 f_tempname(argvars, rettv)
14463     typval_T	*argvars;
14464     typval_T	*rettv;
14465 {
14466     static int	x = 'A';
14467 
14468     rettv->v_type = VAR_STRING;
14469     rettv->vval.v_string = vim_tempname(x);
14470 
14471     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14472      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14473     do
14474     {
14475 	if (x == 'Z')
14476 	    x = '0';
14477 	else if (x == '9')
14478 	    x = 'A';
14479 	else
14480 	{
14481 #ifdef EBCDIC
14482 	    if (x == 'I')
14483 		x = 'J';
14484 	    else if (x == 'R')
14485 		x = 'S';
14486 	    else
14487 #endif
14488 		++x;
14489 	}
14490     } while (x == 'I' || x == 'O');
14491 }
14492 
14493 /*
14494  * "test(list)" function: Just checking the walls...
14495  */
14496 /*ARGSUSED*/
14497     static void
14498 f_test(argvars, rettv)
14499     typval_T	*argvars;
14500     typval_T	*rettv;
14501 {
14502     /* Used for unit testing.  Change the code below to your liking. */
14503 #if 0
14504     listitem_T	*li;
14505     list_T	*l;
14506     char_u	*bad, *good;
14507 
14508     if (argvars[0].v_type != VAR_LIST)
14509 	return;
14510     l = argvars[0].vval.v_list;
14511     if (l == NULL)
14512 	return;
14513     li = l->lv_first;
14514     if (li == NULL)
14515 	return;
14516     bad = get_tv_string(&li->li_tv);
14517     li = li->li_next;
14518     if (li == NULL)
14519 	return;
14520     good = get_tv_string(&li->li_tv);
14521     rettv->vval.v_number = test_edit_score(bad, good);
14522 #endif
14523 }
14524 
14525 /*
14526  * "tolower(string)" function
14527  */
14528     static void
14529 f_tolower(argvars, rettv)
14530     typval_T	*argvars;
14531     typval_T	*rettv;
14532 {
14533     char_u	*p;
14534 
14535     p = vim_strsave(get_tv_string(&argvars[0]));
14536     rettv->v_type = VAR_STRING;
14537     rettv->vval.v_string = p;
14538 
14539     if (p != NULL)
14540 	while (*p != NUL)
14541 	{
14542 #ifdef FEAT_MBYTE
14543 	    int		l;
14544 
14545 	    if (enc_utf8)
14546 	    {
14547 		int c, lc;
14548 
14549 		c = utf_ptr2char(p);
14550 		lc = utf_tolower(c);
14551 		l = utf_ptr2len(p);
14552 		/* TODO: reallocate string when byte count changes. */
14553 		if (utf_char2len(lc) == l)
14554 		    utf_char2bytes(lc, p);
14555 		p += l;
14556 	    }
14557 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
14558 		p += l;		/* skip multi-byte character */
14559 	    else
14560 #endif
14561 	    {
14562 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14563 		++p;
14564 	    }
14565 	}
14566 }
14567 
14568 /*
14569  * "toupper(string)" function
14570  */
14571     static void
14572 f_toupper(argvars, rettv)
14573     typval_T	*argvars;
14574     typval_T	*rettv;
14575 {
14576     rettv->v_type = VAR_STRING;
14577     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14578 }
14579 
14580 /*
14581  * "tr(string, fromstr, tostr)" function
14582  */
14583     static void
14584 f_tr(argvars, rettv)
14585     typval_T	*argvars;
14586     typval_T	*rettv;
14587 {
14588     char_u	*instr;
14589     char_u	*fromstr;
14590     char_u	*tostr;
14591     char_u	*p;
14592 #ifdef FEAT_MBYTE
14593     int		inlen;
14594     int		fromlen;
14595     int		tolen;
14596     int		idx;
14597     char_u	*cpstr;
14598     int		cplen;
14599     int		first = TRUE;
14600 #endif
14601     char_u	buf[NUMBUFLEN];
14602     char_u	buf2[NUMBUFLEN];
14603     garray_T	ga;
14604 
14605     instr = get_tv_string(&argvars[0]);
14606     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14607     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14608 
14609     /* Default return value: empty string. */
14610     rettv->v_type = VAR_STRING;
14611     rettv->vval.v_string = NULL;
14612     if (fromstr == NULL || tostr == NULL)
14613 	    return;		/* type error; errmsg already given */
14614     ga_init2(&ga, (int)sizeof(char), 80);
14615 
14616 #ifdef FEAT_MBYTE
14617     if (!has_mbyte)
14618 #endif
14619 	/* not multi-byte: fromstr and tostr must be the same length */
14620 	if (STRLEN(fromstr) != STRLEN(tostr))
14621 	{
14622 #ifdef FEAT_MBYTE
14623 error:
14624 #endif
14625 	    EMSG2(_(e_invarg2), fromstr);
14626 	    ga_clear(&ga);
14627 	    return;
14628 	}
14629 
14630     /* fromstr and tostr have to contain the same number of chars */
14631     while (*instr != NUL)
14632     {
14633 #ifdef FEAT_MBYTE
14634 	if (has_mbyte)
14635 	{
14636 	    inlen = (*mb_ptr2len)(instr);
14637 	    cpstr = instr;
14638 	    cplen = inlen;
14639 	    idx = 0;
14640 	    for (p = fromstr; *p != NUL; p += fromlen)
14641 	    {
14642 		fromlen = (*mb_ptr2len)(p);
14643 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14644 		{
14645 		    for (p = tostr; *p != NUL; p += tolen)
14646 		    {
14647 			tolen = (*mb_ptr2len)(p);
14648 			if (idx-- == 0)
14649 			{
14650 			    cplen = tolen;
14651 			    cpstr = p;
14652 			    break;
14653 			}
14654 		    }
14655 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14656 			goto error;
14657 		    break;
14658 		}
14659 		++idx;
14660 	    }
14661 
14662 	    if (first && cpstr == instr)
14663 	    {
14664 		/* Check that fromstr and tostr have the same number of
14665 		 * (multi-byte) characters.  Done only once when a character
14666 		 * of instr doesn't appear in fromstr. */
14667 		first = FALSE;
14668 		for (p = tostr; *p != NUL; p += tolen)
14669 		{
14670 		    tolen = (*mb_ptr2len)(p);
14671 		    --idx;
14672 		}
14673 		if (idx != 0)
14674 		    goto error;
14675 	    }
14676 
14677 	    ga_grow(&ga, cplen);
14678 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14679 	    ga.ga_len += cplen;
14680 
14681 	    instr += inlen;
14682 	}
14683 	else
14684 #endif
14685 	{
14686 	    /* When not using multi-byte chars we can do it faster. */
14687 	    p = vim_strchr(fromstr, *instr);
14688 	    if (p != NULL)
14689 		ga_append(&ga, tostr[p - fromstr]);
14690 	    else
14691 		ga_append(&ga, *instr);
14692 	    ++instr;
14693 	}
14694     }
14695 
14696     rettv->vval.v_string = ga.ga_data;
14697 }
14698 
14699 /*
14700  * "type(expr)" function
14701  */
14702     static void
14703 f_type(argvars, rettv)
14704     typval_T	*argvars;
14705     typval_T	*rettv;
14706 {
14707     int n;
14708 
14709     switch (argvars[0].v_type)
14710     {
14711 	case VAR_NUMBER: n = 0; break;
14712 	case VAR_STRING: n = 1; break;
14713 	case VAR_FUNC:   n = 2; break;
14714 	case VAR_LIST:   n = 3; break;
14715 	case VAR_DICT:   n = 4; break;
14716 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14717     }
14718     rettv->vval.v_number = n;
14719 }
14720 
14721 /*
14722  * "values(dict)" function
14723  */
14724     static void
14725 f_values(argvars, rettv)
14726     typval_T	*argvars;
14727     typval_T	*rettv;
14728 {
14729     dict_list(argvars, rettv, 1);
14730 }
14731 
14732 /*
14733  * "virtcol(string)" function
14734  */
14735     static void
14736 f_virtcol(argvars, rettv)
14737     typval_T	*argvars;
14738     typval_T	*rettv;
14739 {
14740     colnr_T	vcol = 0;
14741     pos_T	*fp;
14742 
14743     fp = var2fpos(&argvars[0], FALSE);
14744     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14745     {
14746 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14747 	++vcol;
14748     }
14749 
14750     rettv->vval.v_number = vcol;
14751 }
14752 
14753 /*
14754  * "visualmode()" function
14755  */
14756 /*ARGSUSED*/
14757     static void
14758 f_visualmode(argvars, rettv)
14759     typval_T	*argvars;
14760     typval_T	*rettv;
14761 {
14762 #ifdef FEAT_VISUAL
14763     char_u	str[2];
14764 
14765     rettv->v_type = VAR_STRING;
14766     str[0] = curbuf->b_visual_mode_eval;
14767     str[1] = NUL;
14768     rettv->vval.v_string = vim_strsave(str);
14769 
14770     /* A non-zero number or non-empty string argument: reset mode. */
14771     if ((argvars[0].v_type == VAR_NUMBER
14772 		&& argvars[0].vval.v_number != 0)
14773 	    || (argvars[0].v_type == VAR_STRING
14774 		&& *get_tv_string(&argvars[0]) != NUL))
14775 	curbuf->b_visual_mode_eval = NUL;
14776 #else
14777     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14778 #endif
14779 }
14780 
14781 /*
14782  * "winbufnr(nr)" function
14783  */
14784     static void
14785 f_winbufnr(argvars, rettv)
14786     typval_T	*argvars;
14787     typval_T	*rettv;
14788 {
14789     win_T	*wp;
14790 
14791     wp = find_win_by_nr(&argvars[0]);
14792     if (wp == NULL)
14793 	rettv->vval.v_number = -1;
14794     else
14795 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14796 }
14797 
14798 /*
14799  * "wincol()" function
14800  */
14801 /*ARGSUSED*/
14802     static void
14803 f_wincol(argvars, rettv)
14804     typval_T	*argvars;
14805     typval_T	*rettv;
14806 {
14807     validate_cursor();
14808     rettv->vval.v_number = curwin->w_wcol + 1;
14809 }
14810 
14811 /*
14812  * "winheight(nr)" function
14813  */
14814     static void
14815 f_winheight(argvars, rettv)
14816     typval_T	*argvars;
14817     typval_T	*rettv;
14818 {
14819     win_T	*wp;
14820 
14821     wp = find_win_by_nr(&argvars[0]);
14822     if (wp == NULL)
14823 	rettv->vval.v_number = -1;
14824     else
14825 	rettv->vval.v_number = wp->w_height;
14826 }
14827 
14828 /*
14829  * "winline()" function
14830  */
14831 /*ARGSUSED*/
14832     static void
14833 f_winline(argvars, rettv)
14834     typval_T	*argvars;
14835     typval_T	*rettv;
14836 {
14837     validate_cursor();
14838     rettv->vval.v_number = curwin->w_wrow + 1;
14839 }
14840 
14841 /*
14842  * "winnr()" function
14843  */
14844 /* ARGSUSED */
14845     static void
14846 f_winnr(argvars, rettv)
14847     typval_T	*argvars;
14848     typval_T	*rettv;
14849 {
14850     int		nr = 1;
14851 #ifdef FEAT_WINDOWS
14852     win_T	*wp;
14853     win_T	*twin = curwin;
14854     char_u	*arg;
14855 
14856     if (argvars[0].v_type != VAR_UNKNOWN)
14857     {
14858 	arg = get_tv_string_chk(&argvars[0]);
14859 	if (arg == NULL)
14860 	    nr = 0;		/* type error; errmsg already given */
14861 	else if (STRCMP(arg, "$") == 0)
14862 	    twin = lastwin;
14863 	else if (STRCMP(arg, "#") == 0)
14864 	{
14865 	    twin = prevwin;
14866 	    if (prevwin == NULL)
14867 		nr = 0;
14868 	}
14869 	else
14870 	{
14871 	    EMSG2(_(e_invexpr2), arg);
14872 	    nr = 0;
14873 	}
14874     }
14875 
14876     if (nr > 0)
14877 	for (wp = firstwin; wp != twin; wp = wp->w_next)
14878 	    ++nr;
14879 #endif
14880     rettv->vval.v_number = nr;
14881 }
14882 
14883 /*
14884  * "winrestcmd()" function
14885  */
14886 /* ARGSUSED */
14887     static void
14888 f_winrestcmd(argvars, rettv)
14889     typval_T	*argvars;
14890     typval_T	*rettv;
14891 {
14892 #ifdef FEAT_WINDOWS
14893     win_T	*wp;
14894     int		winnr = 1;
14895     garray_T	ga;
14896     char_u	buf[50];
14897 
14898     ga_init2(&ga, (int)sizeof(char), 70);
14899     for (wp = firstwin; wp != NULL; wp = wp->w_next)
14900     {
14901 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
14902 	ga_concat(&ga, buf);
14903 # ifdef FEAT_VERTSPLIT
14904 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
14905 	ga_concat(&ga, buf);
14906 # endif
14907 	++winnr;
14908     }
14909     ga_append(&ga, NUL);
14910 
14911     rettv->vval.v_string = ga.ga_data;
14912 #else
14913     rettv->vval.v_string = NULL;
14914 #endif
14915     rettv->v_type = VAR_STRING;
14916 }
14917 
14918 /*
14919  * "winwidth(nr)" function
14920  */
14921     static void
14922 f_winwidth(argvars, rettv)
14923     typval_T	*argvars;
14924     typval_T	*rettv;
14925 {
14926     win_T	*wp;
14927 
14928     wp = find_win_by_nr(&argvars[0]);
14929     if (wp == NULL)
14930 	rettv->vval.v_number = -1;
14931     else
14932 #ifdef FEAT_VERTSPLIT
14933 	rettv->vval.v_number = wp->w_width;
14934 #else
14935 	rettv->vval.v_number = Columns;
14936 #endif
14937 }
14938 
14939 /*
14940  * "writefile()" function
14941  */
14942     static void
14943 f_writefile(argvars, rettv)
14944     typval_T	*argvars;
14945     typval_T	*rettv;
14946 {
14947     int		binary = FALSE;
14948     char_u	*fname;
14949     FILE	*fd;
14950     listitem_T	*li;
14951     char_u	*s;
14952     int		ret = 0;
14953     int		c;
14954 
14955     if (argvars[0].v_type != VAR_LIST)
14956     {
14957 	EMSG2(_(e_listarg), "writefile()");
14958 	return;
14959     }
14960     if (argvars[0].vval.v_list == NULL)
14961 	return;
14962 
14963     if (argvars[2].v_type != VAR_UNKNOWN
14964 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
14965 	binary = TRUE;
14966 
14967     /* Always open the file in binary mode, library functions have a mind of
14968      * their own about CR-LF conversion. */
14969     fname = get_tv_string(&argvars[1]);
14970     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
14971     {
14972 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
14973 	ret = -1;
14974     }
14975     else
14976     {
14977 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
14978 							     li = li->li_next)
14979 	{
14980 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
14981 	    {
14982 		if (*s == '\n')
14983 		    c = putc(NUL, fd);
14984 		else
14985 		    c = putc(*s, fd);
14986 		if (c == EOF)
14987 		{
14988 		    ret = -1;
14989 		    break;
14990 		}
14991 	    }
14992 	    if (!binary || li->li_next != NULL)
14993 		if (putc('\n', fd) == EOF)
14994 		{
14995 		    ret = -1;
14996 		    break;
14997 		}
14998 	    if (ret < 0)
14999 	    {
15000 		EMSG(_(e_write));
15001 		break;
15002 	    }
15003 	}
15004 	fclose(fd);
15005     }
15006 
15007     rettv->vval.v_number = ret;
15008 }
15009 
15010 /*
15011  * Translate a String variable into a position.
15012  */
15013     static pos_T *
15014 var2fpos(varp, lnum)
15015     typval_T	*varp;
15016     int		lnum;		/* TRUE when $ is last line */
15017 {
15018     char_u	*name;
15019     static pos_T	pos;
15020     pos_T	*pp;
15021 
15022     name = get_tv_string_chk(varp);
15023     if (name == NULL)
15024 	return NULL;
15025     if (name[0] == '.')		/* cursor */
15026 	return &curwin->w_cursor;
15027     if (name[0] == '\'')	/* mark */
15028     {
15029 	pp = getmark(name[1], FALSE);
15030 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
15031 	    return NULL;
15032 	return pp;
15033     }
15034     if (name[0] == '$')		/* last column or line */
15035     {
15036 	if (lnum)
15037 	{
15038 	    pos.lnum = curbuf->b_ml.ml_line_count;
15039 	    pos.col = 0;
15040 	}
15041 	else
15042 	{
15043 	    pos.lnum = curwin->w_cursor.lnum;
15044 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
15045 	}
15046 	return &pos;
15047     }
15048     return NULL;
15049 }
15050 
15051 /*
15052  * Get the length of an environment variable name.
15053  * Advance "arg" to the first character after the name.
15054  * Return 0 for error.
15055  */
15056     static int
15057 get_env_len(arg)
15058     char_u	**arg;
15059 {
15060     char_u	*p;
15061     int		len;
15062 
15063     for (p = *arg; vim_isIDc(*p); ++p)
15064 	;
15065     if (p == *arg)	    /* no name found */
15066 	return 0;
15067 
15068     len = (int)(p - *arg);
15069     *arg = p;
15070     return len;
15071 }
15072 
15073 /*
15074  * Get the length of the name of a function or internal variable.
15075  * "arg" is advanced to the first non-white character after the name.
15076  * Return 0 if something is wrong.
15077  */
15078     static int
15079 get_id_len(arg)
15080     char_u	**arg;
15081 {
15082     char_u	*p;
15083     int		len;
15084 
15085     /* Find the end of the name. */
15086     for (p = *arg; eval_isnamec(*p); ++p)
15087 	;
15088     if (p == *arg)	    /* no name found */
15089 	return 0;
15090 
15091     len = (int)(p - *arg);
15092     *arg = skipwhite(p);
15093 
15094     return len;
15095 }
15096 
15097 /*
15098  * Get the length of the name of a variable or function.
15099  * Only the name is recognized, does not handle ".key" or "[idx]".
15100  * "arg" is advanced to the first non-white character after the name.
15101  * Return -1 if curly braces expansion failed.
15102  * Return 0 if something else is wrong.
15103  * If the name contains 'magic' {}'s, expand them and return the
15104  * expanded name in an allocated string via 'alias' - caller must free.
15105  */
15106     static int
15107 get_name_len(arg, alias, evaluate, verbose)
15108     char_u	**arg;
15109     char_u	**alias;
15110     int		evaluate;
15111     int		verbose;
15112 {
15113     int		len;
15114     char_u	*p;
15115     char_u	*expr_start;
15116     char_u	*expr_end;
15117 
15118     *alias = NULL;  /* default to no alias */
15119 
15120     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
15121 						  && (*arg)[2] == (int)KE_SNR)
15122     {
15123 	/* hard coded <SNR>, already translated */
15124 	*arg += 3;
15125 	return get_id_len(arg) + 3;
15126     }
15127     len = eval_fname_script(*arg);
15128     if (len > 0)
15129     {
15130 	/* literal "<SID>", "s:" or "<SNR>" */
15131 	*arg += len;
15132     }
15133 
15134     /*
15135      * Find the end of the name; check for {} construction.
15136      */
15137     p = find_name_end(*arg, &expr_start, &expr_end,
15138 					       len > 0 ? 0 : FNE_CHECK_START);
15139     if (expr_start != NULL)
15140     {
15141 	char_u	*temp_string;
15142 
15143 	if (!evaluate)
15144 	{
15145 	    len += (int)(p - *arg);
15146 	    *arg = skipwhite(p);
15147 	    return len;
15148 	}
15149 
15150 	/*
15151 	 * Include any <SID> etc in the expanded string:
15152 	 * Thus the -len here.
15153 	 */
15154 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15155 	if (temp_string == NULL)
15156 	    return -1;
15157 	*alias = temp_string;
15158 	*arg = skipwhite(p);
15159 	return (int)STRLEN(temp_string);
15160     }
15161 
15162     len += get_id_len(arg);
15163     if (len == 0 && verbose)
15164 	EMSG2(_(e_invexpr2), *arg);
15165 
15166     return len;
15167 }
15168 
15169 /*
15170  * Find the end of a variable or function name, taking care of magic braces.
15171  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15172  * start and end of the first magic braces item.
15173  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15174  * Return a pointer to just after the name.  Equal to "arg" if there is no
15175  * valid name.
15176  */
15177     static char_u *
15178 find_name_end(arg, expr_start, expr_end, flags)
15179     char_u	*arg;
15180     char_u	**expr_start;
15181     char_u	**expr_end;
15182     int		flags;
15183 {
15184     int		mb_nest = 0;
15185     int		br_nest = 0;
15186     char_u	*p;
15187 
15188     if (expr_start != NULL)
15189     {
15190 	*expr_start = NULL;
15191 	*expr_end = NULL;
15192     }
15193 
15194     /* Quick check for valid starting character. */
15195     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15196 	return arg;
15197 
15198     for (p = arg; *p != NUL
15199 		    && (eval_isnamec(*p)
15200 			|| *p == '{'
15201 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15202 			|| mb_nest != 0
15203 			|| br_nest != 0); mb_ptr_adv(p))
15204     {
15205 	if (*p == '\'')
15206 	{
15207 	    /* skip over 'string' to avoid counting [ and ] inside it. */
15208 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
15209 		;
15210 	    if (*p == NUL)
15211 		break;
15212 	}
15213 	else if (*p == '"')
15214 	{
15215 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
15216 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
15217 		if (*p == '\\' && p[1] != NUL)
15218 		    ++p;
15219 	    if (*p == NUL)
15220 		break;
15221 	}
15222 
15223 	if (mb_nest == 0)
15224 	{
15225 	    if (*p == '[')
15226 		++br_nest;
15227 	    else if (*p == ']')
15228 		--br_nest;
15229 	}
15230 
15231 	if (br_nest == 0)
15232 	{
15233 	    if (*p == '{')
15234 	    {
15235 		mb_nest++;
15236 		if (expr_start != NULL && *expr_start == NULL)
15237 		    *expr_start = p;
15238 	    }
15239 	    else if (*p == '}')
15240 	    {
15241 		mb_nest--;
15242 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15243 		    *expr_end = p;
15244 	    }
15245 	}
15246     }
15247 
15248     return p;
15249 }
15250 
15251 /*
15252  * Expands out the 'magic' {}'s in a variable/function name.
15253  * Note that this can call itself recursively, to deal with
15254  * constructs like foo{bar}{baz}{bam}
15255  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15256  *			"in_start"      ^
15257  *			"expr_start"	   ^
15258  *			"expr_end"		 ^
15259  *			"in_end"			    ^
15260  *
15261  * Returns a new allocated string, which the caller must free.
15262  * Returns NULL for failure.
15263  */
15264     static char_u *
15265 make_expanded_name(in_start, expr_start, expr_end, in_end)
15266     char_u	*in_start;
15267     char_u	*expr_start;
15268     char_u	*expr_end;
15269     char_u	*in_end;
15270 {
15271     char_u	c1;
15272     char_u	*retval = NULL;
15273     char_u	*temp_result;
15274     char_u	*nextcmd = NULL;
15275 
15276     if (expr_end == NULL || in_end == NULL)
15277 	return NULL;
15278     *expr_start	= NUL;
15279     *expr_end = NUL;
15280     c1 = *in_end;
15281     *in_end = NUL;
15282 
15283     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15284     if (temp_result != NULL && nextcmd == NULL)
15285     {
15286 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15287 						   + (in_end - expr_end) + 1));
15288 	if (retval != NULL)
15289 	{
15290 	    STRCPY(retval, in_start);
15291 	    STRCAT(retval, temp_result);
15292 	    STRCAT(retval, expr_end + 1);
15293 	}
15294     }
15295     vim_free(temp_result);
15296 
15297     *in_end = c1;		/* put char back for error messages */
15298     *expr_start = '{';
15299     *expr_end = '}';
15300 
15301     if (retval != NULL)
15302     {
15303 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15304 	if (expr_start != NULL)
15305 	{
15306 	    /* Further expansion! */
15307 	    temp_result = make_expanded_name(retval, expr_start,
15308 						       expr_end, temp_result);
15309 	    vim_free(retval);
15310 	    retval = temp_result;
15311 	}
15312     }
15313 
15314     return retval;
15315 }
15316 
15317 /*
15318  * Return TRUE if character "c" can be used in a variable or function name.
15319  * Does not include '{' or '}' for magic braces.
15320  */
15321     static int
15322 eval_isnamec(c)
15323     int	    c;
15324 {
15325     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15326 }
15327 
15328 /*
15329  * Return TRUE if character "c" can be used as the first character in a
15330  * variable or function name (excluding '{' and '}').
15331  */
15332     static int
15333 eval_isnamec1(c)
15334     int	    c;
15335 {
15336     return (ASCII_ISALPHA(c) || c == '_');
15337 }
15338 
15339 /*
15340  * Set number v: variable to "val".
15341  */
15342     void
15343 set_vim_var_nr(idx, val)
15344     int		idx;
15345     long	val;
15346 {
15347     vimvars[idx].vv_nr = val;
15348 }
15349 
15350 /*
15351  * Get number v: variable value.
15352  */
15353     long
15354 get_vim_var_nr(idx)
15355     int		idx;
15356 {
15357     return vimvars[idx].vv_nr;
15358 }
15359 
15360 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15361 /*
15362  * Get string v: variable value.  Uses a static buffer, can only be used once.
15363  */
15364     char_u *
15365 get_vim_var_str(idx)
15366     int		idx;
15367 {
15368     return get_tv_string(&vimvars[idx].vv_tv);
15369 }
15370 #endif
15371 
15372 /*
15373  * Set v:count, v:count1 and v:prevcount.
15374  */
15375     void
15376 set_vcount(count, count1)
15377     long	count;
15378     long	count1;
15379 {
15380     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15381     vimvars[VV_COUNT].vv_nr = count;
15382     vimvars[VV_COUNT1].vv_nr = count1;
15383 }
15384 
15385 /*
15386  * Set string v: variable to a copy of "val".
15387  */
15388     void
15389 set_vim_var_string(idx, val, len)
15390     int		idx;
15391     char_u	*val;
15392     int		len;	    /* length of "val" to use or -1 (whole string) */
15393 {
15394     /* Need to do this (at least) once, since we can't initialize a union.
15395      * Will always be invoked when "v:progname" is set. */
15396     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15397 
15398     vim_free(vimvars[idx].vv_str);
15399     if (val == NULL)
15400 	vimvars[idx].vv_str = NULL;
15401     else if (len == -1)
15402 	vimvars[idx].vv_str = vim_strsave(val);
15403     else
15404 	vimvars[idx].vv_str = vim_strnsave(val, len);
15405 }
15406 
15407 /*
15408  * Set v:register if needed.
15409  */
15410     void
15411 set_reg_var(c)
15412     int		c;
15413 {
15414     char_u	regname;
15415 
15416     if (c == 0 || c == ' ')
15417 	regname = '"';
15418     else
15419 	regname = c;
15420     /* Avoid free/alloc when the value is already right. */
15421     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15422 	set_vim_var_string(VV_REG, &regname, 1);
15423 }
15424 
15425 /*
15426  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15427  * Otherwise, restore the value to "oldval" and return NULL.
15428  * Must always be called in pairs to save and restore v:exception!  Does not
15429  * take care of memory allocations.
15430  */
15431     char_u *
15432 v_exception(oldval)
15433     char_u	*oldval;
15434 {
15435     if (oldval == NULL)
15436 	return vimvars[VV_EXCEPTION].vv_str;
15437 
15438     vimvars[VV_EXCEPTION].vv_str = oldval;
15439     return NULL;
15440 }
15441 
15442 /*
15443  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15444  * Otherwise, restore the value to "oldval" and return NULL.
15445  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15446  * take care of memory allocations.
15447  */
15448     char_u *
15449 v_throwpoint(oldval)
15450     char_u	*oldval;
15451 {
15452     if (oldval == NULL)
15453 	return vimvars[VV_THROWPOINT].vv_str;
15454 
15455     vimvars[VV_THROWPOINT].vv_str = oldval;
15456     return NULL;
15457 }
15458 
15459 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15460 /*
15461  * Set v:cmdarg.
15462  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15463  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15464  * Must always be called in pairs!
15465  */
15466     char_u *
15467 set_cmdarg(eap, oldarg)
15468     exarg_T	*eap;
15469     char_u	*oldarg;
15470 {
15471     char_u	*oldval;
15472     char_u	*newval;
15473     unsigned	len;
15474 
15475     oldval = vimvars[VV_CMDARG].vv_str;
15476     if (eap == NULL)
15477     {
15478 	vim_free(oldval);
15479 	vimvars[VV_CMDARG].vv_str = oldarg;
15480 	return NULL;
15481     }
15482 
15483     if (eap->force_bin == FORCE_BIN)
15484 	len = 6;
15485     else if (eap->force_bin == FORCE_NOBIN)
15486 	len = 8;
15487     else
15488 	len = 0;
15489     if (eap->force_ff != 0)
15490 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15491 # ifdef FEAT_MBYTE
15492     if (eap->force_enc != 0)
15493 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15494 # endif
15495 
15496     newval = alloc(len + 1);
15497     if (newval == NULL)
15498 	return NULL;
15499 
15500     if (eap->force_bin == FORCE_BIN)
15501 	sprintf((char *)newval, " ++bin");
15502     else if (eap->force_bin == FORCE_NOBIN)
15503 	sprintf((char *)newval, " ++nobin");
15504     else
15505 	*newval = NUL;
15506     if (eap->force_ff != 0)
15507 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15508 						eap->cmd + eap->force_ff);
15509 # ifdef FEAT_MBYTE
15510     if (eap->force_enc != 0)
15511 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15512 					       eap->cmd + eap->force_enc);
15513 # endif
15514     vimvars[VV_CMDARG].vv_str = newval;
15515     return oldval;
15516 }
15517 #endif
15518 
15519 /*
15520  * Get the value of internal variable "name".
15521  * Return OK or FAIL.
15522  */
15523     static int
15524 get_var_tv(name, len, rettv, verbose)
15525     char_u	*name;
15526     int		len;		/* length of "name" */
15527     typval_T	*rettv;		/* NULL when only checking existence */
15528     int		verbose;	/* may give error message */
15529 {
15530     int		ret = OK;
15531     typval_T	*tv = NULL;
15532     typval_T	atv;
15533     dictitem_T	*v;
15534     int		cc;
15535 
15536     /* truncate the name, so that we can use strcmp() */
15537     cc = name[len];
15538     name[len] = NUL;
15539 
15540     /*
15541      * Check for "b:changedtick".
15542      */
15543     if (STRCMP(name, "b:changedtick") == 0)
15544     {
15545 	atv.v_type = VAR_NUMBER;
15546 	atv.vval.v_number = curbuf->b_changedtick;
15547 	tv = &atv;
15548     }
15549 
15550     /*
15551      * Check for user-defined variables.
15552      */
15553     else
15554     {
15555 	v = find_var(name, NULL);
15556 	if (v != NULL)
15557 	    tv = &v->di_tv;
15558     }
15559 
15560     if (tv == NULL)
15561     {
15562 	if (rettv != NULL && verbose)
15563 	    EMSG2(_(e_undefvar), name);
15564 	ret = FAIL;
15565     }
15566     else if (rettv != NULL)
15567 	copy_tv(tv, rettv);
15568 
15569     name[len] = cc;
15570 
15571     return ret;
15572 }
15573 
15574 /*
15575  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15576  * Also handle function call with Funcref variable: func(expr)
15577  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15578  */
15579     static int
15580 handle_subscript(arg, rettv, evaluate, verbose)
15581     char_u	**arg;
15582     typval_T	*rettv;
15583     int		evaluate;	/* do more than finding the end */
15584     int		verbose;	/* give error messages */
15585 {
15586     int		ret = OK;
15587     dict_T	*selfdict = NULL;
15588     char_u	*s;
15589     int		len;
15590     typval_T	functv;
15591 
15592     while (ret == OK
15593 	    && (**arg == '['
15594 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15595 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15596 	    && !vim_iswhite(*(*arg - 1)))
15597     {
15598 	if (**arg == '(')
15599 	{
15600 	    /* need to copy the funcref so that we can clear rettv */
15601 	    functv = *rettv;
15602 	    rettv->v_type = VAR_UNKNOWN;
15603 
15604 	    /* Invoke the function.  Recursive! */
15605 	    s = functv.vval.v_string;
15606 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15607 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15608 			&len, evaluate, selfdict);
15609 
15610 	    /* Clear the funcref afterwards, so that deleting it while
15611 	     * evaluating the arguments is possible (see test55). */
15612 	    clear_tv(&functv);
15613 
15614 	    /* Stop the expression evaluation when immediately aborting on
15615 	     * error, or when an interrupt occurred or an exception was thrown
15616 	     * but not caught. */
15617 	    if (aborting())
15618 	    {
15619 		if (ret == OK)
15620 		    clear_tv(rettv);
15621 		ret = FAIL;
15622 	    }
15623 	    dict_unref(selfdict);
15624 	    selfdict = NULL;
15625 	}
15626 	else /* **arg == '[' || **arg == '.' */
15627 	{
15628 	    dict_unref(selfdict);
15629 	    if (rettv->v_type == VAR_DICT)
15630 	    {
15631 		selfdict = rettv->vval.v_dict;
15632 		if (selfdict != NULL)
15633 		    ++selfdict->dv_refcount;
15634 	    }
15635 	    else
15636 		selfdict = NULL;
15637 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15638 	    {
15639 		clear_tv(rettv);
15640 		ret = FAIL;
15641 	    }
15642 	}
15643     }
15644     dict_unref(selfdict);
15645     return ret;
15646 }
15647 
15648 /*
15649  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15650  * value).
15651  */
15652     static typval_T *
15653 alloc_tv()
15654 {
15655     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15656 }
15657 
15658 /*
15659  * Allocate memory for a variable type-value, and assign a string to it.
15660  * The string "s" must have been allocated, it is consumed.
15661  * Return NULL for out of memory, the variable otherwise.
15662  */
15663     static typval_T *
15664 alloc_string_tv(s)
15665     char_u	*s;
15666 {
15667     typval_T	*rettv;
15668 
15669     rettv = alloc_tv();
15670     if (rettv != NULL)
15671     {
15672 	rettv->v_type = VAR_STRING;
15673 	rettv->vval.v_string = s;
15674     }
15675     else
15676 	vim_free(s);
15677     return rettv;
15678 }
15679 
15680 /*
15681  * Free the memory for a variable type-value.
15682  */
15683     static void
15684 free_tv(varp)
15685     typval_T *varp;
15686 {
15687     if (varp != NULL)
15688     {
15689 	switch (varp->v_type)
15690 	{
15691 	    case VAR_FUNC:
15692 		func_unref(varp->vval.v_string);
15693 		/*FALLTHROUGH*/
15694 	    case VAR_STRING:
15695 		vim_free(varp->vval.v_string);
15696 		break;
15697 	    case VAR_LIST:
15698 		list_unref(varp->vval.v_list);
15699 		break;
15700 	    case VAR_DICT:
15701 		dict_unref(varp->vval.v_dict);
15702 		break;
15703 	    case VAR_NUMBER:
15704 	    case VAR_UNKNOWN:
15705 		break;
15706 	    default:
15707 		EMSG2(_(e_intern2), "free_tv()");
15708 		break;
15709 	}
15710 	vim_free(varp);
15711     }
15712 }
15713 
15714 /*
15715  * Free the memory for a variable value and set the value to NULL or 0.
15716  */
15717     void
15718 clear_tv(varp)
15719     typval_T *varp;
15720 {
15721     if (varp != NULL)
15722     {
15723 	switch (varp->v_type)
15724 	{
15725 	    case VAR_FUNC:
15726 		func_unref(varp->vval.v_string);
15727 		/*FALLTHROUGH*/
15728 	    case VAR_STRING:
15729 		vim_free(varp->vval.v_string);
15730 		varp->vval.v_string = NULL;
15731 		break;
15732 	    case VAR_LIST:
15733 		list_unref(varp->vval.v_list);
15734 		varp->vval.v_list = NULL;
15735 		break;
15736 	    case VAR_DICT:
15737 		dict_unref(varp->vval.v_dict);
15738 		varp->vval.v_dict = NULL;
15739 		break;
15740 	    case VAR_NUMBER:
15741 		varp->vval.v_number = 0;
15742 		break;
15743 	    case VAR_UNKNOWN:
15744 		break;
15745 	    default:
15746 		EMSG2(_(e_intern2), "clear_tv()");
15747 	}
15748 	varp->v_lock = 0;
15749     }
15750 }
15751 
15752 /*
15753  * Set the value of a variable to NULL without freeing items.
15754  */
15755     static void
15756 init_tv(varp)
15757     typval_T *varp;
15758 {
15759     if (varp != NULL)
15760 	vim_memset(varp, 0, sizeof(typval_T));
15761 }
15762 
15763 /*
15764  * Get the number value of a variable.
15765  * If it is a String variable, uses vim_str2nr().
15766  * For incompatible types, return 0.
15767  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15768  * caller of incompatible types: it sets *denote to TRUE if "denote"
15769  * is not NULL or returns -1 otherwise.
15770  */
15771     static long
15772 get_tv_number(varp)
15773     typval_T	*varp;
15774 {
15775     int		error = FALSE;
15776 
15777     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15778 }
15779 
15780     long
15781 get_tv_number_chk(varp, denote)
15782     typval_T	*varp;
15783     int		*denote;
15784 {
15785     long	n = 0L;
15786 
15787     switch (varp->v_type)
15788     {
15789 	case VAR_NUMBER:
15790 	    return (long)(varp->vval.v_number);
15791 	case VAR_FUNC:
15792 	    EMSG(_("E703: Using a Funcref as a number"));
15793 	    break;
15794 	case VAR_STRING:
15795 	    if (varp->vval.v_string != NULL)
15796 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15797 							TRUE, TRUE, &n, NULL);
15798 	    return n;
15799 	case VAR_LIST:
15800 	    EMSG(_("E745: Using a List as a number"));
15801 	    break;
15802 	case VAR_DICT:
15803 	    EMSG(_("E728: Using a Dictionary as a number"));
15804 	    break;
15805 	default:
15806 	    EMSG2(_(e_intern2), "get_tv_number()");
15807 	    break;
15808     }
15809     if (denote == NULL)		/* useful for values that must be unsigned */
15810 	n = -1;
15811     else
15812 	*denote = TRUE;
15813     return n;
15814 }
15815 
15816 /*
15817  * Get the lnum from the first argument.
15818  * Also accepts ".", "$", etc., but that only works for the current buffer.
15819  * Returns -1 on error.
15820  */
15821     static linenr_T
15822 get_tv_lnum(argvars)
15823     typval_T	*argvars;
15824 {
15825     typval_T	rettv;
15826     linenr_T	lnum;
15827 
15828     lnum = get_tv_number_chk(&argvars[0], NULL);
15829     if (lnum == 0)  /* no valid number, try using line() */
15830     {
15831 	rettv.v_type = VAR_NUMBER;
15832 	f_line(argvars, &rettv);
15833 	lnum = rettv.vval.v_number;
15834 	clear_tv(&rettv);
15835     }
15836     return lnum;
15837 }
15838 
15839 /*
15840  * Get the lnum from the first argument.
15841  * Also accepts "$", then "buf" is used.
15842  * Returns 0 on error.
15843  */
15844     static linenr_T
15845 get_tv_lnum_buf(argvars, buf)
15846     typval_T	*argvars;
15847     buf_T	*buf;
15848 {
15849     if (argvars[0].v_type == VAR_STRING
15850 	    && argvars[0].vval.v_string != NULL
15851 	    && argvars[0].vval.v_string[0] == '$'
15852 	    && buf != NULL)
15853 	return buf->b_ml.ml_line_count;
15854     return get_tv_number_chk(&argvars[0], NULL);
15855 }
15856 
15857 /*
15858  * Get the string value of a variable.
15859  * If it is a Number variable, the number is converted into a string.
15860  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
15861  * get_tv_string_buf() uses a given buffer.
15862  * If the String variable has never been set, return an empty string.
15863  * Never returns NULL;
15864  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
15865  * NULL on error.
15866  */
15867     static char_u *
15868 get_tv_string(varp)
15869     typval_T	*varp;
15870 {
15871     static char_u   mybuf[NUMBUFLEN];
15872 
15873     return get_tv_string_buf(varp, mybuf);
15874 }
15875 
15876     static char_u *
15877 get_tv_string_buf(varp, buf)
15878     typval_T	*varp;
15879     char_u	*buf;
15880 {
15881     char_u	*res =  get_tv_string_buf_chk(varp, buf);
15882 
15883     return res != NULL ? res : (char_u *)"";
15884 }
15885 
15886     char_u *
15887 get_tv_string_chk(varp)
15888     typval_T	*varp;
15889 {
15890     static char_u   mybuf[NUMBUFLEN];
15891 
15892     return get_tv_string_buf_chk(varp, mybuf);
15893 }
15894 
15895     static char_u *
15896 get_tv_string_buf_chk(varp, buf)
15897     typval_T	*varp;
15898     char_u	*buf;
15899 {
15900     switch (varp->v_type)
15901     {
15902 	case VAR_NUMBER:
15903 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
15904 	    return buf;
15905 	case VAR_FUNC:
15906 	    EMSG(_("E729: using Funcref as a String"));
15907 	    break;
15908 	case VAR_LIST:
15909 	    EMSG(_("E730: using List as a String"));
15910 	    break;
15911 	case VAR_DICT:
15912 	    EMSG(_("E731: using Dictionary as a String"));
15913 	    break;
15914 	case VAR_STRING:
15915 	    if (varp->vval.v_string != NULL)
15916 		return varp->vval.v_string;
15917 	    return (char_u *)"";
15918 	default:
15919 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
15920 	    break;
15921     }
15922     return NULL;
15923 }
15924 
15925 /*
15926  * Find variable "name" in the list of variables.
15927  * Return a pointer to it if found, NULL if not found.
15928  * Careful: "a:0" variables don't have a name.
15929  * When "htp" is not NULL we are writing to the variable, set "htp" to the
15930  * hashtab_T used.
15931  */
15932     static dictitem_T *
15933 find_var(name, htp)
15934     char_u	*name;
15935     hashtab_T	**htp;
15936 {
15937     char_u	*varname;
15938     hashtab_T	*ht;
15939 
15940     ht = find_var_ht(name, &varname);
15941     if (htp != NULL)
15942 	*htp = ht;
15943     if (ht == NULL)
15944 	return NULL;
15945     return find_var_in_ht(ht, varname, htp != NULL);
15946 }
15947 
15948 /*
15949  * Find variable "varname" in hashtab "ht".
15950  * Returns NULL if not found.
15951  */
15952     static dictitem_T *
15953 find_var_in_ht(ht, varname, writing)
15954     hashtab_T	*ht;
15955     char_u	*varname;
15956     int		writing;
15957 {
15958     hashitem_T	*hi;
15959 
15960     if (*varname == NUL)
15961     {
15962 	/* Must be something like "s:", otherwise "ht" would be NULL. */
15963 	switch (varname[-2])
15964 	{
15965 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
15966 	    case 'g': return &globvars_var;
15967 	    case 'v': return &vimvars_var;
15968 	    case 'b': return &curbuf->b_bufvar;
15969 	    case 'w': return &curwin->w_winvar;
15970 	    case 'l': return current_funccal == NULL
15971 					? NULL : &current_funccal->l_vars_var;
15972 	    case 'a': return current_funccal == NULL
15973 				       ? NULL : &current_funccal->l_avars_var;
15974 	}
15975 	return NULL;
15976     }
15977 
15978     hi = hash_find(ht, varname);
15979     if (HASHITEM_EMPTY(hi))
15980     {
15981 	/* For global variables we may try auto-loading the script.  If it
15982 	 * worked find the variable again.  Don't auto-load a script if it was
15983 	 * loaded already, otherwise it would be loaded every time when
15984 	 * checking if a function name is a Funcref variable. */
15985 	if (ht == &globvarht && !writing
15986 			    && script_autoload(varname, FALSE) && !aborting())
15987 	    hi = hash_find(ht, varname);
15988 	if (HASHITEM_EMPTY(hi))
15989 	    return NULL;
15990     }
15991     return HI2DI(hi);
15992 }
15993 
15994 /*
15995  * Find the hashtab used for a variable name.
15996  * Set "varname" to the start of name without ':'.
15997  */
15998     static hashtab_T *
15999 find_var_ht(name, varname)
16000     char_u  *name;
16001     char_u  **varname;
16002 {
16003     hashitem_T	*hi;
16004 
16005     if (name[1] != ':')
16006     {
16007 	/* The name must not start with a colon or #. */
16008 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
16009 	    return NULL;
16010 	*varname = name;
16011 
16012 	/* "version" is "v:version" in all scopes */
16013 	hi = hash_find(&compat_hashtab, name);
16014 	if (!HASHITEM_EMPTY(hi))
16015 	    return &compat_hashtab;
16016 
16017 	if (current_funccal == NULL)
16018 	    return &globvarht;			/* global variable */
16019 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
16020     }
16021     *varname = name + 2;
16022     if (*name == 'g')				/* global variable */
16023 	return &globvarht;
16024     /* There must be no ':' or '#' in the rest of the name, unless g: is used
16025      */
16026     if (vim_strchr(name + 2, ':') != NULL
16027 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
16028 	return NULL;
16029     if (*name == 'b')				/* buffer variable */
16030 	return &curbuf->b_vars.dv_hashtab;
16031     if (*name == 'w')				/* window variable */
16032 	return &curwin->w_vars.dv_hashtab;
16033     if (*name == 'v')				/* v: variable */
16034 	return &vimvarht;
16035     if (*name == 'a' && current_funccal != NULL) /* function argument */
16036 	return &current_funccal->l_avars.dv_hashtab;
16037     if (*name == 'l' && current_funccal != NULL) /* local function variable */
16038 	return &current_funccal->l_vars.dv_hashtab;
16039     if (*name == 's'				/* script variable */
16040 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
16041 	return &SCRIPT_VARS(current_SID);
16042     return NULL;
16043 }
16044 
16045 /*
16046  * Get the string value of a (global/local) variable.
16047  * Returns NULL when it doesn't exist.
16048  */
16049     char_u *
16050 get_var_value(name)
16051     char_u	*name;
16052 {
16053     dictitem_T	*v;
16054 
16055     v = find_var(name, NULL);
16056     if (v == NULL)
16057 	return NULL;
16058     return get_tv_string(&v->di_tv);
16059 }
16060 
16061 /*
16062  * Allocate a new hashtab for a sourced script.  It will be used while
16063  * sourcing this script and when executing functions defined in the script.
16064  */
16065     void
16066 new_script_vars(id)
16067     scid_T id;
16068 {
16069     int		i;
16070     hashtab_T	*ht;
16071     scriptvar_T *sv;
16072 
16073     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
16074     {
16075 	/* Re-allocating ga_data means that an ht_array pointing to
16076 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
16077 	 * at its init value.  Also reset "v_dict", it's always the same. */
16078 	for (i = 1; i <= ga_scripts.ga_len; ++i)
16079 	{
16080 	    ht = &SCRIPT_VARS(i);
16081 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
16082 		ht->ht_array = ht->ht_smallarray;
16083 	    sv = &SCRIPT_SV(i);
16084 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
16085 	}
16086 
16087 	while (ga_scripts.ga_len < id)
16088 	{
16089 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
16090 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
16091 	    ++ga_scripts.ga_len;
16092 	}
16093     }
16094 }
16095 
16096 /*
16097  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
16098  * point to it.
16099  */
16100     void
16101 init_var_dict(dict, dict_var)
16102     dict_T	*dict;
16103     dictitem_T	*dict_var;
16104 {
16105     hash_init(&dict->dv_hashtab);
16106     dict->dv_refcount = 99999;
16107     dict_var->di_tv.vval.v_dict = dict;
16108     dict_var->di_tv.v_type = VAR_DICT;
16109     dict_var->di_tv.v_lock = VAR_FIXED;
16110     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
16111     dict_var->di_key[0] = NUL;
16112 }
16113 
16114 /*
16115  * Clean up a list of internal variables.
16116  * Frees all allocated variables and the value they contain.
16117  * Clears hashtab "ht", does not free it.
16118  */
16119     void
16120 vars_clear(ht)
16121     hashtab_T *ht;
16122 {
16123     vars_clear_ext(ht, TRUE);
16124 }
16125 
16126 /*
16127  * Like vars_clear(), but only free the value if "free_val" is TRUE.
16128  */
16129     static void
16130 vars_clear_ext(ht, free_val)
16131     hashtab_T	*ht;
16132     int		free_val;
16133 {
16134     int		todo;
16135     hashitem_T	*hi;
16136     dictitem_T	*v;
16137 
16138     hash_lock(ht);
16139     todo = ht->ht_used;
16140     for (hi = ht->ht_array; todo > 0; ++hi)
16141     {
16142 	if (!HASHITEM_EMPTY(hi))
16143 	{
16144 	    --todo;
16145 
16146 	    /* Free the variable.  Don't remove it from the hashtab,
16147 	     * ht_array might change then.  hash_clear() takes care of it
16148 	     * later. */
16149 	    v = HI2DI(hi);
16150 	    if (free_val)
16151 		clear_tv(&v->di_tv);
16152 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
16153 		vim_free(v);
16154 	}
16155     }
16156     hash_clear(ht);
16157     ht->ht_used = 0;
16158 }
16159 
16160 /*
16161  * Delete a variable from hashtab "ht" at item "hi".
16162  * Clear the variable value and free the dictitem.
16163  */
16164     static void
16165 delete_var(ht, hi)
16166     hashtab_T	*ht;
16167     hashitem_T	*hi;
16168 {
16169     dictitem_T	*di = HI2DI(hi);
16170 
16171     hash_remove(ht, hi);
16172     clear_tv(&di->di_tv);
16173     vim_free(di);
16174 }
16175 
16176 /*
16177  * List the value of one internal variable.
16178  */
16179     static void
16180 list_one_var(v, prefix)
16181     dictitem_T	*v;
16182     char_u	*prefix;
16183 {
16184     char_u	*tofree;
16185     char_u	*s;
16186     char_u	numbuf[NUMBUFLEN];
16187 
16188     s = echo_string(&v->di_tv, &tofree, numbuf);
16189     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16190 						s == NULL ? (char_u *)"" : s);
16191     vim_free(tofree);
16192 }
16193 
16194     static void
16195 list_one_var_a(prefix, name, type, string)
16196     char_u	*prefix;
16197     char_u	*name;
16198     int		type;
16199     char_u	*string;
16200 {
16201     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16202     if (name != NULL)	/* "a:" vars don't have a name stored */
16203 	msg_puts(name);
16204     msg_putchar(' ');
16205     msg_advance(22);
16206     if (type == VAR_NUMBER)
16207 	msg_putchar('#');
16208     else if (type == VAR_FUNC)
16209 	msg_putchar('*');
16210     else if (type == VAR_LIST)
16211     {
16212 	msg_putchar('[');
16213 	if (*string == '[')
16214 	    ++string;
16215     }
16216     else if (type == VAR_DICT)
16217     {
16218 	msg_putchar('{');
16219 	if (*string == '{')
16220 	    ++string;
16221     }
16222     else
16223 	msg_putchar(' ');
16224 
16225     msg_outtrans(string);
16226 
16227     if (type == VAR_FUNC)
16228 	msg_puts((char_u *)"()");
16229 }
16230 
16231 /*
16232  * Set variable "name" to value in "tv".
16233  * If the variable already exists, the value is updated.
16234  * Otherwise the variable is created.
16235  */
16236     static void
16237 set_var(name, tv, copy)
16238     char_u	*name;
16239     typval_T	*tv;
16240     int		copy;	    /* make copy of value in "tv" */
16241 {
16242     dictitem_T	*v;
16243     char_u	*varname;
16244     hashtab_T	*ht;
16245     char_u	*p;
16246 
16247     if (tv->v_type == VAR_FUNC)
16248     {
16249 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16250 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16251 							 ? name[2] : name[0]))
16252 	{
16253 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16254 	    return;
16255 	}
16256 	if (function_exists(name))
16257 	{
16258 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16259 									name);
16260 	    return;
16261 	}
16262     }
16263 
16264     ht = find_var_ht(name, &varname);
16265     if (ht == NULL || *varname == NUL)
16266     {
16267 	EMSG2(_(e_illvar), name);
16268 	return;
16269     }
16270 
16271     v = find_var_in_ht(ht, varname, TRUE);
16272     if (v != NULL)
16273     {
16274 	/* existing variable, need to clear the value */
16275 	if (var_check_ro(v->di_flags, name)
16276 				      || tv_check_lock(v->di_tv.v_lock, name))
16277 	    return;
16278 	if (v->di_tv.v_type != tv->v_type
16279 		&& !((v->di_tv.v_type == VAR_STRING
16280 			|| v->di_tv.v_type == VAR_NUMBER)
16281 		    && (tv->v_type == VAR_STRING
16282 			|| tv->v_type == VAR_NUMBER)))
16283 	{
16284 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16285 	    return;
16286 	}
16287 
16288 	/*
16289 	 * Handle setting internal v: variables separately: we don't change
16290 	 * the type.
16291 	 */
16292 	if (ht == &vimvarht)
16293 	{
16294 	    if (v->di_tv.v_type == VAR_STRING)
16295 	    {
16296 		vim_free(v->di_tv.vval.v_string);
16297 		if (copy || tv->v_type != VAR_STRING)
16298 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16299 		else
16300 		{
16301 		    /* Take over the string to avoid an extra alloc/free. */
16302 		    v->di_tv.vval.v_string = tv->vval.v_string;
16303 		    tv->vval.v_string = NULL;
16304 		}
16305 	    }
16306 	    else if (v->di_tv.v_type != VAR_NUMBER)
16307 		EMSG2(_(e_intern2), "set_var()");
16308 	    else
16309 		v->di_tv.vval.v_number = get_tv_number(tv);
16310 	    return;
16311 	}
16312 
16313 	clear_tv(&v->di_tv);
16314     }
16315     else		    /* add a new variable */
16316     {
16317 	/* Make sure the variable name is valid. */
16318 	for (p = varname; *p != NUL; ++p)
16319 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16320 	    {
16321 		EMSG2(_(e_illvar), varname);
16322 		return;
16323 	    }
16324 
16325 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16326 							  + STRLEN(varname)));
16327 	if (v == NULL)
16328 	    return;
16329 	STRCPY(v->di_key, varname);
16330 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16331 	{
16332 	    vim_free(v);
16333 	    return;
16334 	}
16335 	v->di_flags = 0;
16336     }
16337 
16338     if (copy || tv->v_type == VAR_NUMBER)
16339 	copy_tv(tv, &v->di_tv);
16340     else
16341     {
16342 	v->di_tv = *tv;
16343 	v->di_tv.v_lock = 0;
16344 	init_tv(tv);
16345     }
16346 }
16347 
16348 /*
16349  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16350  * Also give an error message.
16351  */
16352     static int
16353 var_check_ro(flags, name)
16354     int		flags;
16355     char_u	*name;
16356 {
16357     if (flags & DI_FLAGS_RO)
16358     {
16359 	EMSG2(_(e_readonlyvar), name);
16360 	return TRUE;
16361     }
16362     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16363     {
16364 	EMSG2(_(e_readonlysbx), name);
16365 	return TRUE;
16366     }
16367     return FALSE;
16368 }
16369 
16370 /*
16371  * Return TRUE if typeval "tv" is set to be locked (immutable).
16372  * Also give an error message, using "name".
16373  */
16374     static int
16375 tv_check_lock(lock, name)
16376     int		lock;
16377     char_u	*name;
16378 {
16379     if (lock & VAR_LOCKED)
16380     {
16381 	EMSG2(_("E741: Value is locked: %s"),
16382 				name == NULL ? (char_u *)_("Unknown") : name);
16383 	return TRUE;
16384     }
16385     if (lock & VAR_FIXED)
16386     {
16387 	EMSG2(_("E742: Cannot change value of %s"),
16388 				name == NULL ? (char_u *)_("Unknown") : name);
16389 	return TRUE;
16390     }
16391     return FALSE;
16392 }
16393 
16394 /*
16395  * Copy the values from typval_T "from" to typval_T "to".
16396  * When needed allocates string or increases reference count.
16397  * Does not make a copy of a list or dict but copies the reference!
16398  */
16399     static void
16400 copy_tv(from, to)
16401     typval_T *from;
16402     typval_T *to;
16403 {
16404     to->v_type = from->v_type;
16405     to->v_lock = 0;
16406     switch (from->v_type)
16407     {
16408 	case VAR_NUMBER:
16409 	    to->vval.v_number = from->vval.v_number;
16410 	    break;
16411 	case VAR_STRING:
16412 	case VAR_FUNC:
16413 	    if (from->vval.v_string == NULL)
16414 		to->vval.v_string = NULL;
16415 	    else
16416 	    {
16417 		to->vval.v_string = vim_strsave(from->vval.v_string);
16418 		if (from->v_type == VAR_FUNC)
16419 		    func_ref(to->vval.v_string);
16420 	    }
16421 	    break;
16422 	case VAR_LIST:
16423 	    if (from->vval.v_list == NULL)
16424 		to->vval.v_list = NULL;
16425 	    else
16426 	    {
16427 		to->vval.v_list = from->vval.v_list;
16428 		++to->vval.v_list->lv_refcount;
16429 	    }
16430 	    break;
16431 	case VAR_DICT:
16432 	    if (from->vval.v_dict == NULL)
16433 		to->vval.v_dict = NULL;
16434 	    else
16435 	    {
16436 		to->vval.v_dict = from->vval.v_dict;
16437 		++to->vval.v_dict->dv_refcount;
16438 	    }
16439 	    break;
16440 	default:
16441 	    EMSG2(_(e_intern2), "copy_tv()");
16442 	    break;
16443     }
16444 }
16445 
16446 /*
16447  * Make a copy of an item.
16448  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16449  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16450  * reference to an already copied list/dict can be used.
16451  * Returns FAIL or OK.
16452  */
16453     static int
16454 item_copy(from, to, deep, copyID)
16455     typval_T	*from;
16456     typval_T	*to;
16457     int		deep;
16458     int		copyID;
16459 {
16460     static int	recurse = 0;
16461     int		ret = OK;
16462 
16463     if (recurse >= DICT_MAXNEST)
16464     {
16465 	EMSG(_("E698: variable nested too deep for making a copy"));
16466 	return FAIL;
16467     }
16468     ++recurse;
16469 
16470     switch (from->v_type)
16471     {
16472 	case VAR_NUMBER:
16473 	case VAR_STRING:
16474 	case VAR_FUNC:
16475 	    copy_tv(from, to);
16476 	    break;
16477 	case VAR_LIST:
16478 	    to->v_type = VAR_LIST;
16479 	    to->v_lock = 0;
16480 	    if (from->vval.v_list == NULL)
16481 		to->vval.v_list = NULL;
16482 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16483 	    {
16484 		/* use the copy made earlier */
16485 		to->vval.v_list = from->vval.v_list->lv_copylist;
16486 		++to->vval.v_list->lv_refcount;
16487 	    }
16488 	    else
16489 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16490 	    if (to->vval.v_list == NULL)
16491 		ret = FAIL;
16492 	    break;
16493 	case VAR_DICT:
16494 	    to->v_type = VAR_DICT;
16495 	    to->v_lock = 0;
16496 	    if (from->vval.v_dict == NULL)
16497 		to->vval.v_dict = NULL;
16498 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16499 	    {
16500 		/* use the copy made earlier */
16501 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16502 		++to->vval.v_dict->dv_refcount;
16503 	    }
16504 	    else
16505 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16506 	    if (to->vval.v_dict == NULL)
16507 		ret = FAIL;
16508 	    break;
16509 	default:
16510 	    EMSG2(_(e_intern2), "item_copy()");
16511 	    ret = FAIL;
16512     }
16513     --recurse;
16514     return ret;
16515 }
16516 
16517 /*
16518  * ":echo expr1 ..."	print each argument separated with a space, add a
16519  *			newline at the end.
16520  * ":echon expr1 ..."	print each argument plain.
16521  */
16522     void
16523 ex_echo(eap)
16524     exarg_T	*eap;
16525 {
16526     char_u	*arg = eap->arg;
16527     typval_T	rettv;
16528     char_u	*tofree;
16529     char_u	*p;
16530     int		needclr = TRUE;
16531     int		atstart = TRUE;
16532     char_u	numbuf[NUMBUFLEN];
16533 
16534     if (eap->skip)
16535 	++emsg_skip;
16536     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16537     {
16538 	p = arg;
16539 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16540 	{
16541 	    /*
16542 	     * Report the invalid expression unless the expression evaluation
16543 	     * has been cancelled due to an aborting error, an interrupt, or an
16544 	     * exception.
16545 	     */
16546 	    if (!aborting())
16547 		EMSG2(_(e_invexpr2), p);
16548 	    break;
16549 	}
16550 	if (!eap->skip)
16551 	{
16552 	    if (atstart)
16553 	    {
16554 		atstart = FALSE;
16555 		/* Call msg_start() after eval1(), evaluating the expression
16556 		 * may cause a message to appear. */
16557 		if (eap->cmdidx == CMD_echo)
16558 		    msg_start();
16559 	    }
16560 	    else if (eap->cmdidx == CMD_echo)
16561 		msg_puts_attr((char_u *)" ", echo_attr);
16562 	    p = echo_string(&rettv, &tofree, numbuf);
16563 	    if (p != NULL)
16564 		for ( ; *p != NUL && !got_int; ++p)
16565 		{
16566 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16567 		    {
16568 			if (*p != TAB && needclr)
16569 			{
16570 			    /* remove any text still there from the command */
16571 			    msg_clr_eos();
16572 			    needclr = FALSE;
16573 			}
16574 			msg_putchar_attr(*p, echo_attr);
16575 		    }
16576 		    else
16577 		    {
16578 #ifdef FEAT_MBYTE
16579 			if (has_mbyte)
16580 			{
16581 			    int i = (*mb_ptr2len)(p);
16582 
16583 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16584 			    p += i - 1;
16585 			}
16586 			else
16587 #endif
16588 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16589 		    }
16590 		}
16591 	    vim_free(tofree);
16592 	}
16593 	clear_tv(&rettv);
16594 	arg = skipwhite(arg);
16595     }
16596     eap->nextcmd = check_nextcmd(arg);
16597 
16598     if (eap->skip)
16599 	--emsg_skip;
16600     else
16601     {
16602 	/* remove text that may still be there from the command */
16603 	if (needclr)
16604 	    msg_clr_eos();
16605 	if (eap->cmdidx == CMD_echo)
16606 	    msg_end();
16607     }
16608 }
16609 
16610 /*
16611  * ":echohl {name}".
16612  */
16613     void
16614 ex_echohl(eap)
16615     exarg_T	*eap;
16616 {
16617     int		id;
16618 
16619     id = syn_name2id(eap->arg);
16620     if (id == 0)
16621 	echo_attr = 0;
16622     else
16623 	echo_attr = syn_id2attr(id);
16624 }
16625 
16626 /*
16627  * ":execute expr1 ..."	execute the result of an expression.
16628  * ":echomsg expr1 ..."	Print a message
16629  * ":echoerr expr1 ..."	Print an error
16630  * Each gets spaces around each argument and a newline at the end for
16631  * echo commands
16632  */
16633     void
16634 ex_execute(eap)
16635     exarg_T	*eap;
16636 {
16637     char_u	*arg = eap->arg;
16638     typval_T	rettv;
16639     int		ret = OK;
16640     char_u	*p;
16641     garray_T	ga;
16642     int		len;
16643     int		save_did_emsg;
16644 
16645     ga_init2(&ga, 1, 80);
16646 
16647     if (eap->skip)
16648 	++emsg_skip;
16649     while (*arg != NUL && *arg != '|' && *arg != '\n')
16650     {
16651 	p = arg;
16652 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16653 	{
16654 	    /*
16655 	     * Report the invalid expression unless the expression evaluation
16656 	     * has been cancelled due to an aborting error, an interrupt, or an
16657 	     * exception.
16658 	     */
16659 	    if (!aborting())
16660 		EMSG2(_(e_invexpr2), p);
16661 	    ret = FAIL;
16662 	    break;
16663 	}
16664 
16665 	if (!eap->skip)
16666 	{
16667 	    p = get_tv_string(&rettv);
16668 	    len = (int)STRLEN(p);
16669 	    if (ga_grow(&ga, len + 2) == FAIL)
16670 	    {
16671 		clear_tv(&rettv);
16672 		ret = FAIL;
16673 		break;
16674 	    }
16675 	    if (ga.ga_len)
16676 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16677 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16678 	    ga.ga_len += len;
16679 	}
16680 
16681 	clear_tv(&rettv);
16682 	arg = skipwhite(arg);
16683     }
16684 
16685     if (ret != FAIL && ga.ga_data != NULL)
16686     {
16687 	if (eap->cmdidx == CMD_echomsg)
16688 	    MSG_ATTR(ga.ga_data, echo_attr);
16689 	else if (eap->cmdidx == CMD_echoerr)
16690 	{
16691 	    /* We don't want to abort following commands, restore did_emsg. */
16692 	    save_did_emsg = did_emsg;
16693 	    EMSG((char_u *)ga.ga_data);
16694 	    if (!force_abort)
16695 		did_emsg = save_did_emsg;
16696 	}
16697 	else if (eap->cmdidx == CMD_execute)
16698 	    do_cmdline((char_u *)ga.ga_data,
16699 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16700     }
16701 
16702     ga_clear(&ga);
16703 
16704     if (eap->skip)
16705 	--emsg_skip;
16706 
16707     eap->nextcmd = check_nextcmd(arg);
16708 }
16709 
16710 /*
16711  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16712  * "arg" points to the "&" or '+' when called, to "option" when returning.
16713  * Returns NULL when no option name found.  Otherwise pointer to the char
16714  * after the option name.
16715  */
16716     static char_u *
16717 find_option_end(arg, opt_flags)
16718     char_u	**arg;
16719     int		*opt_flags;
16720 {
16721     char_u	*p = *arg;
16722 
16723     ++p;
16724     if (*p == 'g' && p[1] == ':')
16725     {
16726 	*opt_flags = OPT_GLOBAL;
16727 	p += 2;
16728     }
16729     else if (*p == 'l' && p[1] == ':')
16730     {
16731 	*opt_flags = OPT_LOCAL;
16732 	p += 2;
16733     }
16734     else
16735 	*opt_flags = 0;
16736 
16737     if (!ASCII_ISALPHA(*p))
16738 	return NULL;
16739     *arg = p;
16740 
16741     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16742 	p += 4;	    /* termcap option */
16743     else
16744 	while (ASCII_ISALPHA(*p))
16745 	    ++p;
16746     return p;
16747 }
16748 
16749 /*
16750  * ":function"
16751  */
16752     void
16753 ex_function(eap)
16754     exarg_T	*eap;
16755 {
16756     char_u	*theline;
16757     int		j;
16758     int		c;
16759     int		saved_did_emsg;
16760     char_u	*name = NULL;
16761     char_u	*p;
16762     char_u	*arg;
16763     garray_T	newargs;
16764     garray_T	newlines;
16765     int		varargs = FALSE;
16766     int		mustend = FALSE;
16767     int		flags = 0;
16768     ufunc_T	*fp;
16769     int		indent;
16770     int		nesting;
16771     char_u	*skip_until = NULL;
16772     dictitem_T	*v;
16773     funcdict_T	fudi;
16774     static int	func_nr = 0;	    /* number for nameless function */
16775     int		paren;
16776     hashtab_T	*ht;
16777     int		todo;
16778     hashitem_T	*hi;
16779 
16780     /*
16781      * ":function" without argument: list functions.
16782      */
16783     if (ends_excmd(*eap->arg))
16784     {
16785 	if (!eap->skip)
16786 	{
16787 	    todo = func_hashtab.ht_used;
16788 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16789 	    {
16790 		if (!HASHITEM_EMPTY(hi))
16791 		{
16792 		    --todo;
16793 		    fp = HI2UF(hi);
16794 		    if (!isdigit(*fp->uf_name))
16795 			list_func_head(fp, FALSE);
16796 		}
16797 	    }
16798 	}
16799 	eap->nextcmd = check_nextcmd(eap->arg);
16800 	return;
16801     }
16802 
16803     /*
16804      * Get the function name.  There are these situations:
16805      * func	    normal function name
16806      *		    "name" == func, "fudi.fd_dict" == NULL
16807      * dict.func    new dictionary entry
16808      *		    "name" == NULL, "fudi.fd_dict" set,
16809      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
16810      * dict.func    existing dict entry with a Funcref
16811      *		    "name" == func, "fudi.fd_dict" set,
16812      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16813      * dict.func    existing dict entry that's not a Funcref
16814      *		    "name" == NULL, "fudi.fd_dict" set,
16815      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16816      */
16817     p = eap->arg;
16818     name = trans_function_name(&p, eap->skip, 0, &fudi);
16819     paren = (vim_strchr(p, '(') != NULL);
16820     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
16821     {
16822 	/*
16823 	 * Return on an invalid expression in braces, unless the expression
16824 	 * evaluation has been cancelled due to an aborting error, an
16825 	 * interrupt, or an exception.
16826 	 */
16827 	if (!aborting())
16828 	{
16829 	    if (!eap->skip && fudi.fd_newkey != NULL)
16830 		EMSG2(_(e_dictkey), fudi.fd_newkey);
16831 	    vim_free(fudi.fd_newkey);
16832 	    return;
16833 	}
16834 	else
16835 	    eap->skip = TRUE;
16836     }
16837     /* An error in a function call during evaluation of an expression in magic
16838      * braces should not cause the function not to be defined. */
16839     saved_did_emsg = did_emsg;
16840     did_emsg = FALSE;
16841 
16842     /*
16843      * ":function func" with only function name: list function.
16844      */
16845     if (!paren)
16846     {
16847 	if (!ends_excmd(*skipwhite(p)))
16848 	{
16849 	    EMSG(_(e_trailing));
16850 	    goto ret_free;
16851 	}
16852 	eap->nextcmd = check_nextcmd(p);
16853 	if (eap->nextcmd != NULL)
16854 	    *p = NUL;
16855 	if (!eap->skip && !got_int)
16856 	{
16857 	    fp = find_func(name);
16858 	    if (fp != NULL)
16859 	    {
16860 		list_func_head(fp, TRUE);
16861 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
16862 		{
16863 		    msg_putchar('\n');
16864 		    msg_outnum((long)(j + 1));
16865 		    if (j < 9)
16866 			msg_putchar(' ');
16867 		    if (j < 99)
16868 			msg_putchar(' ');
16869 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
16870 		    out_flush();	/* show a line at a time */
16871 		    ui_breakcheck();
16872 		}
16873 		if (!got_int)
16874 		{
16875 		    msg_putchar('\n');
16876 		    msg_puts((char_u *)"   endfunction");
16877 		}
16878 	    }
16879 	    else
16880 		emsg_funcname("E123: Undefined function: %s", name);
16881 	}
16882 	goto ret_free;
16883     }
16884 
16885     /*
16886      * ":function name(arg1, arg2)" Define function.
16887      */
16888     p = skipwhite(p);
16889     if (*p != '(')
16890     {
16891 	if (!eap->skip)
16892 	{
16893 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
16894 	    goto ret_free;
16895 	}
16896 	/* attempt to continue by skipping some text */
16897 	if (vim_strchr(p, '(') != NULL)
16898 	    p = vim_strchr(p, '(');
16899     }
16900     p = skipwhite(p + 1);
16901 
16902     ga_init2(&newargs, (int)sizeof(char_u *), 3);
16903     ga_init2(&newlines, (int)sizeof(char_u *), 3);
16904 
16905     if (!eap->skip)
16906     {
16907 	/* Check the name of the function. */
16908 	if (name != NULL)
16909 	    arg = name;
16910 	else
16911 	    arg = fudi.fd_newkey;
16912 	if (arg != NULL)
16913 	{
16914 	    if (*arg == K_SPECIAL)
16915 		j = 3;
16916 	    else
16917 		j = 0;
16918 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
16919 						      : eval_isnamec(arg[j])))
16920 		++j;
16921 	    if (arg[j] != NUL)
16922 		emsg_funcname(_(e_invarg2), arg);
16923 	}
16924     }
16925 
16926     /*
16927      * Isolate the arguments: "arg1, arg2, ...)"
16928      */
16929     while (*p != ')')
16930     {
16931 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
16932 	{
16933 	    varargs = TRUE;
16934 	    p += 3;
16935 	    mustend = TRUE;
16936 	}
16937 	else
16938 	{
16939 	    arg = p;
16940 	    while (ASCII_ISALNUM(*p) || *p == '_')
16941 		++p;
16942 	    if (arg == p || isdigit(*arg)
16943 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
16944 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
16945 	    {
16946 		if (!eap->skip)
16947 		    EMSG2(_("E125: Illegal argument: %s"), arg);
16948 		break;
16949 	    }
16950 	    if (ga_grow(&newargs, 1) == FAIL)
16951 		goto erret;
16952 	    c = *p;
16953 	    *p = NUL;
16954 	    arg = vim_strsave(arg);
16955 	    if (arg == NULL)
16956 		goto erret;
16957 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
16958 	    *p = c;
16959 	    newargs.ga_len++;
16960 	    if (*p == ',')
16961 		++p;
16962 	    else
16963 		mustend = TRUE;
16964 	}
16965 	p = skipwhite(p);
16966 	if (mustend && *p != ')')
16967 	{
16968 	    if (!eap->skip)
16969 		EMSG2(_(e_invarg2), eap->arg);
16970 	    break;
16971 	}
16972     }
16973     ++p;	/* skip the ')' */
16974 
16975     /* find extra arguments "range", "dict" and "abort" */
16976     for (;;)
16977     {
16978 	p = skipwhite(p);
16979 	if (STRNCMP(p, "range", 5) == 0)
16980 	{
16981 	    flags |= FC_RANGE;
16982 	    p += 5;
16983 	}
16984 	else if (STRNCMP(p, "dict", 4) == 0)
16985 	{
16986 	    flags |= FC_DICT;
16987 	    p += 4;
16988 	}
16989 	else if (STRNCMP(p, "abort", 5) == 0)
16990 	{
16991 	    flags |= FC_ABORT;
16992 	    p += 5;
16993 	}
16994 	else
16995 	    break;
16996     }
16997 
16998     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
16999 	EMSG(_(e_trailing));
17000 
17001     /*
17002      * Read the body of the function, until ":endfunction" is found.
17003      */
17004     if (KeyTyped)
17005     {
17006 	/* Check if the function already exists, don't let the user type the
17007 	 * whole function before telling him it doesn't work!  For a script we
17008 	 * need to skip the body to be able to find what follows. */
17009 	if (!eap->skip && !eap->forceit)
17010 	{
17011 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
17012 		EMSG(_(e_funcdict));
17013 	    else if (name != NULL && find_func(name) != NULL)
17014 		emsg_funcname(e_funcexts, name);
17015 	}
17016 
17017 	if (!eap->skip && did_emsg)
17018 	    goto erret;
17019 
17020 	msg_putchar('\n');	    /* don't overwrite the function name */
17021 	cmdline_row = msg_row;
17022     }
17023 
17024     indent = 2;
17025     nesting = 0;
17026     for (;;)
17027     {
17028 	msg_scroll = TRUE;
17029 	need_wait_return = FALSE;
17030 	if (eap->getline == NULL)
17031 	    theline = getcmdline(':', 0L, indent);
17032 	else
17033 	    theline = eap->getline(':', eap->cookie, indent);
17034 	if (KeyTyped)
17035 	    lines_left = Rows - 1;
17036 	if (theline == NULL)
17037 	{
17038 	    EMSG(_("E126: Missing :endfunction"));
17039 	    goto erret;
17040 	}
17041 
17042 	if (skip_until != NULL)
17043 	{
17044 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
17045 	     * don't check for ":endfunc". */
17046 	    if (STRCMP(theline, skip_until) == 0)
17047 	    {
17048 		vim_free(skip_until);
17049 		skip_until = NULL;
17050 	    }
17051 	}
17052 	else
17053 	{
17054 	    /* skip ':' and blanks*/
17055 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
17056 		;
17057 
17058 	    /* Check for "endfunction". */
17059 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
17060 	    {
17061 		vim_free(theline);
17062 		break;
17063 	    }
17064 
17065 	    /* Increase indent inside "if", "while", "for" and "try", decrease
17066 	     * at "end". */
17067 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
17068 		indent -= 2;
17069 	    else if (STRNCMP(p, "if", 2) == 0
17070 		    || STRNCMP(p, "wh", 2) == 0
17071 		    || STRNCMP(p, "for", 3) == 0
17072 		    || STRNCMP(p, "try", 3) == 0)
17073 		indent += 2;
17074 
17075 	    /* Check for defining a function inside this function. */
17076 	    if (checkforcmd(&p, "function", 2))
17077 	    {
17078 		if (*p == '!')
17079 		    p = skipwhite(p + 1);
17080 		p += eval_fname_script(p);
17081 		if (ASCII_ISALPHA(*p))
17082 		{
17083 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
17084 		    if (*skipwhite(p) == '(')
17085 		    {
17086 			++nesting;
17087 			indent += 2;
17088 		    }
17089 		}
17090 	    }
17091 
17092 	    /* Check for ":append" or ":insert". */
17093 	    p = skip_range(p, NULL);
17094 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
17095 		    || (p[0] == 'i'
17096 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
17097 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
17098 		skip_until = vim_strsave((char_u *)".");
17099 
17100 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
17101 	    arg = skipwhite(skiptowhite(p));
17102 	    if (arg[0] == '<' && arg[1] =='<'
17103 		    && ((p[0] == 'p' && p[1] == 'y'
17104 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
17105 			|| (p[0] == 'p' && p[1] == 'e'
17106 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
17107 			|| (p[0] == 't' && p[1] == 'c'
17108 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
17109 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
17110 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
17111 			|| (p[0] == 'm' && p[1] == 'z'
17112 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
17113 			))
17114 	    {
17115 		/* ":python <<" continues until a dot, like ":append" */
17116 		p = skipwhite(arg + 2);
17117 		if (*p == NUL)
17118 		    skip_until = vim_strsave((char_u *)".");
17119 		else
17120 		    skip_until = vim_strsave(p);
17121 	    }
17122 	}
17123 
17124 	/* Add the line to the function. */
17125 	if (ga_grow(&newlines, 1) == FAIL)
17126 	{
17127 	    vim_free(theline);
17128 	    goto erret;
17129 	}
17130 
17131 	/* Copy the line to newly allocated memory.  get_one_sourceline()
17132 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
17133 	 * is an extra alloc/free. */
17134 	p = vim_strsave(theline);
17135 	if (p != NULL)
17136 	{
17137 	    vim_free(theline);
17138 	    theline = p;
17139 	}
17140 
17141 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
17142 	newlines.ga_len++;
17143     }
17144 
17145     /* Don't define the function when skipping commands or when an error was
17146      * detected. */
17147     if (eap->skip || did_emsg)
17148 	goto erret;
17149 
17150     /*
17151      * If there are no errors, add the function
17152      */
17153     if (fudi.fd_dict == NULL)
17154     {
17155 	v = find_var(name, &ht);
17156 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
17157 	{
17158 	    emsg_funcname("E707: Function name conflicts with variable: %s",
17159 									name);
17160 	    goto erret;
17161 	}
17162 
17163 	fp = find_func(name);
17164 	if (fp != NULL)
17165 	{
17166 	    if (!eap->forceit)
17167 	    {
17168 		emsg_funcname(e_funcexts, name);
17169 		goto erret;
17170 	    }
17171 	    if (fp->uf_calls > 0)
17172 	    {
17173 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
17174 									name);
17175 		goto erret;
17176 	    }
17177 	    /* redefine existing function */
17178 	    ga_clear_strings(&(fp->uf_args));
17179 	    ga_clear_strings(&(fp->uf_lines));
17180 	    vim_free(name);
17181 	    name = NULL;
17182 	}
17183     }
17184     else
17185     {
17186 	char	numbuf[20];
17187 
17188 	fp = NULL;
17189 	if (fudi.fd_newkey == NULL && !eap->forceit)
17190 	{
17191 	    EMSG(_(e_funcdict));
17192 	    goto erret;
17193 	}
17194 	if (fudi.fd_di == NULL)
17195 	{
17196 	    /* Can't add a function to a locked dictionary */
17197 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17198 		goto erret;
17199 	}
17200 	    /* Can't change an existing function if it is locked */
17201 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17202 	    goto erret;
17203 
17204 	/* Give the function a sequential number.  Can only be used with a
17205 	 * Funcref! */
17206 	vim_free(name);
17207 	sprintf(numbuf, "%d", ++func_nr);
17208 	name = vim_strsave((char_u *)numbuf);
17209 	if (name == NULL)
17210 	    goto erret;
17211     }
17212 
17213     if (fp == NULL)
17214     {
17215 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17216 	{
17217 	    int	    slen, plen;
17218 	    char_u  *scriptname;
17219 
17220 	    /* Check that the autoload name matches the script name. */
17221 	    j = FAIL;
17222 	    if (sourcing_name != NULL)
17223 	    {
17224 		scriptname = autoload_name(name);
17225 		if (scriptname != NULL)
17226 		{
17227 		    p = vim_strchr(scriptname, '/');
17228 		    plen = STRLEN(p);
17229 		    slen = STRLEN(sourcing_name);
17230 		    if (slen > plen && fnamecmp(p,
17231 					    sourcing_name + slen - plen) == 0)
17232 			j = OK;
17233 		    vim_free(scriptname);
17234 		}
17235 	    }
17236 	    if (j == FAIL)
17237 	    {
17238 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17239 		goto erret;
17240 	    }
17241 	}
17242 
17243 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17244 	if (fp == NULL)
17245 	    goto erret;
17246 
17247 	if (fudi.fd_dict != NULL)
17248 	{
17249 	    if (fudi.fd_di == NULL)
17250 	    {
17251 		/* add new dict entry */
17252 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17253 		if (fudi.fd_di == NULL)
17254 		{
17255 		    vim_free(fp);
17256 		    goto erret;
17257 		}
17258 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17259 		{
17260 		    vim_free(fudi.fd_di);
17261 		    goto erret;
17262 		}
17263 	    }
17264 	    else
17265 		/* overwrite existing dict entry */
17266 		clear_tv(&fudi.fd_di->di_tv);
17267 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17268 	    fudi.fd_di->di_tv.v_lock = 0;
17269 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17270 	    fp->uf_refcount = 1;
17271 	}
17272 
17273 	/* insert the new function in the function list */
17274 	STRCPY(fp->uf_name, name);
17275 	hash_add(&func_hashtab, UF2HIKEY(fp));
17276     }
17277     fp->uf_args = newargs;
17278     fp->uf_lines = newlines;
17279 #ifdef FEAT_PROFILE
17280     fp->uf_tml_count = NULL;
17281     fp->uf_tml_total = NULL;
17282     fp->uf_tml_self = NULL;
17283     fp->uf_profiling = FALSE;
17284     if (prof_def_func())
17285 	func_do_profile(fp);
17286 #endif
17287     fp->uf_varargs = varargs;
17288     fp->uf_flags = flags;
17289     fp->uf_calls = 0;
17290     fp->uf_script_ID = current_SID;
17291     goto ret_free;
17292 
17293 erret:
17294     ga_clear_strings(&newargs);
17295     ga_clear_strings(&newlines);
17296 ret_free:
17297     vim_free(skip_until);
17298     vim_free(fudi.fd_newkey);
17299     vim_free(name);
17300     did_emsg |= saved_did_emsg;
17301 }
17302 
17303 /*
17304  * Get a function name, translating "<SID>" and "<SNR>".
17305  * Also handles a Funcref in a List or Dictionary.
17306  * Returns the function name in allocated memory, or NULL for failure.
17307  * flags:
17308  * TFN_INT:   internal function name OK
17309  * TFN_QUIET: be quiet
17310  * Advances "pp" to just after the function name (if no error).
17311  */
17312     static char_u *
17313 trans_function_name(pp, skip, flags, fdp)
17314     char_u	**pp;
17315     int		skip;		/* only find the end, don't evaluate */
17316     int		flags;
17317     funcdict_T	*fdp;		/* return: info about dictionary used */
17318 {
17319     char_u	*name = NULL;
17320     char_u	*start;
17321     char_u	*end;
17322     int		lead;
17323     char_u	sid_buf[20];
17324     int		len;
17325     lval_T	lv;
17326 
17327     if (fdp != NULL)
17328 	vim_memset(fdp, 0, sizeof(funcdict_T));
17329     start = *pp;
17330 
17331     /* Check for hard coded <SNR>: already translated function ID (from a user
17332      * command). */
17333     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17334 						   && (*pp)[2] == (int)KE_SNR)
17335     {
17336 	*pp += 3;
17337 	len = get_id_len(pp) + 3;
17338 	return vim_strnsave(start, len);
17339     }
17340 
17341     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17342      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17343     lead = eval_fname_script(start);
17344     if (lead > 2)
17345 	start += lead;
17346 
17347     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17348 					      lead > 2 ? 0 : FNE_CHECK_START);
17349     if (end == start)
17350     {
17351 	if (!skip)
17352 	    EMSG(_("E129: Function name required"));
17353 	goto theend;
17354     }
17355     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17356     {
17357 	/*
17358 	 * Report an invalid expression in braces, unless the expression
17359 	 * evaluation has been cancelled due to an aborting error, an
17360 	 * interrupt, or an exception.
17361 	 */
17362 	if (!aborting())
17363 	{
17364 	    if (end != NULL)
17365 		EMSG2(_(e_invarg2), start);
17366 	}
17367 	else
17368 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17369 	goto theend;
17370     }
17371 
17372     if (lv.ll_tv != NULL)
17373     {
17374 	if (fdp != NULL)
17375 	{
17376 	    fdp->fd_dict = lv.ll_dict;
17377 	    fdp->fd_newkey = lv.ll_newkey;
17378 	    lv.ll_newkey = NULL;
17379 	    fdp->fd_di = lv.ll_di;
17380 	}
17381 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17382 	{
17383 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17384 	    *pp = end;
17385 	}
17386 	else
17387 	{
17388 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17389 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17390 		EMSG(_(e_funcref));
17391 	    else
17392 		*pp = end;
17393 	    name = NULL;
17394 	}
17395 	goto theend;
17396     }
17397 
17398     if (lv.ll_name == NULL)
17399     {
17400 	/* Error found, but continue after the function name. */
17401 	*pp = end;
17402 	goto theend;
17403     }
17404 
17405     if (lv.ll_exp_name != NULL)
17406 	len = STRLEN(lv.ll_exp_name);
17407     else
17408     {
17409 	if (lead == 2)	/* skip over "s:" */
17410 	    lv.ll_name += 2;
17411 	len = (int)(end - lv.ll_name);
17412     }
17413 
17414     /*
17415      * Copy the function name to allocated memory.
17416      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17417      * Accept <SNR>123_name() outside a script.
17418      */
17419     if (skip)
17420 	lead = 0;	/* do nothing */
17421     else if (lead > 0)
17422     {
17423 	lead = 3;
17424 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17425 	{
17426 	    if (current_SID <= 0)
17427 	    {
17428 		EMSG(_(e_usingsid));
17429 		goto theend;
17430 	    }
17431 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17432 	    lead += (int)STRLEN(sid_buf);
17433 	}
17434     }
17435     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17436     {
17437 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17438 	goto theend;
17439     }
17440     name = alloc((unsigned)(len + lead + 1));
17441     if (name != NULL)
17442     {
17443 	if (lead > 0)
17444 	{
17445 	    name[0] = K_SPECIAL;
17446 	    name[1] = KS_EXTRA;
17447 	    name[2] = (int)KE_SNR;
17448 	    if (lead > 3)	/* If it's "<SID>" */
17449 		STRCPY(name + 3, sid_buf);
17450 	}
17451 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17452 	name[len + lead] = NUL;
17453     }
17454     *pp = end;
17455 
17456 theend:
17457     clear_lval(&lv);
17458     return name;
17459 }
17460 
17461 /*
17462  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17463  * Return 2 if "p" starts with "s:".
17464  * Return 0 otherwise.
17465  */
17466     static int
17467 eval_fname_script(p)
17468     char_u	*p;
17469 {
17470     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17471 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17472 	return 5;
17473     if (p[0] == 's' && p[1] == ':')
17474 	return 2;
17475     return 0;
17476 }
17477 
17478 /*
17479  * Return TRUE if "p" starts with "<SID>" or "s:".
17480  * Only works if eval_fname_script() returned non-zero for "p"!
17481  */
17482     static int
17483 eval_fname_sid(p)
17484     char_u	*p;
17485 {
17486     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17487 }
17488 
17489 /*
17490  * List the head of the function: "name(arg1, arg2)".
17491  */
17492     static void
17493 list_func_head(fp, indent)
17494     ufunc_T	*fp;
17495     int		indent;
17496 {
17497     int		j;
17498 
17499     msg_start();
17500     if (indent)
17501 	MSG_PUTS("   ");
17502     MSG_PUTS("function ");
17503     if (fp->uf_name[0] == K_SPECIAL)
17504     {
17505 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17506 	msg_puts(fp->uf_name + 3);
17507     }
17508     else
17509 	msg_puts(fp->uf_name);
17510     msg_putchar('(');
17511     for (j = 0; j < fp->uf_args.ga_len; ++j)
17512     {
17513 	if (j)
17514 	    MSG_PUTS(", ");
17515 	msg_puts(FUNCARG(fp, j));
17516     }
17517     if (fp->uf_varargs)
17518     {
17519 	if (j)
17520 	    MSG_PUTS(", ");
17521 	MSG_PUTS("...");
17522     }
17523     msg_putchar(')');
17524 #ifdef FEAT_EVAL
17525     if (p_verbose > 0)
17526 	last_set_msg(fp->uf_script_ID);
17527 #endif
17528 }
17529 
17530 /*
17531  * Find a function by name, return pointer to it in ufuncs.
17532  * Return NULL for unknown function.
17533  */
17534     static ufunc_T *
17535 find_func(name)
17536     char_u	*name;
17537 {
17538     hashitem_T	*hi;
17539 
17540     hi = hash_find(&func_hashtab, name);
17541     if (!HASHITEM_EMPTY(hi))
17542 	return HI2UF(hi);
17543     return NULL;
17544 }
17545 
17546 #if defined(EXITFREE) || defined(PROTO)
17547     void
17548 free_all_functions()
17549 {
17550     hashitem_T	*hi;
17551 
17552     /* Need to start all over every time, because func_free() may change the
17553      * hash table. */
17554     while (func_hashtab.ht_used > 0)
17555 	for (hi = func_hashtab.ht_array; ; ++hi)
17556 	    if (!HASHITEM_EMPTY(hi))
17557 	    {
17558 		func_free(HI2UF(hi));
17559 		break;
17560 	    }
17561 }
17562 #endif
17563 
17564 /*
17565  * Return TRUE if a function "name" exists.
17566  */
17567     static int
17568 function_exists(name)
17569     char_u *name;
17570 {
17571     char_u  *p = name;
17572     int	    n = FALSE;
17573 
17574     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17575     if (p != NULL)
17576     {
17577 	if (builtin_function(p))
17578 	    n = (find_internal_func(p) >= 0);
17579 	else
17580 	    n = (find_func(p) != NULL);
17581 	vim_free(p);
17582     }
17583     return n;
17584 }
17585 
17586 /*
17587  * Return TRUE if "name" looks like a builtin function name: starts with a
17588  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17589  */
17590     static int
17591 builtin_function(name)
17592     char_u *name;
17593 {
17594     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17595 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17596 }
17597 
17598 #if defined(FEAT_PROFILE) || defined(PROTO)
17599 /*
17600  * Start profiling function "fp".
17601  */
17602     static void
17603 func_do_profile(fp)
17604     ufunc_T	*fp;
17605 {
17606     fp->uf_tm_count = 0;
17607     profile_zero(&fp->uf_tm_self);
17608     profile_zero(&fp->uf_tm_total);
17609     if (fp->uf_tml_count == NULL)
17610 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17611 					 (sizeof(int) * fp->uf_lines.ga_len));
17612     if (fp->uf_tml_total == NULL)
17613 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17614 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17615     if (fp->uf_tml_self == NULL)
17616 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17617 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17618     fp->uf_tml_idx = -1;
17619     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17620 						   || fp->uf_tml_self == NULL)
17621 	return;	    /* out of memory */
17622 
17623     fp->uf_profiling = TRUE;
17624 }
17625 
17626 /*
17627  * Dump the profiling results for all functions in file "fd".
17628  */
17629     void
17630 func_dump_profile(fd)
17631     FILE    *fd;
17632 {
17633     hashitem_T	*hi;
17634     int		todo;
17635     ufunc_T	*fp;
17636     int		i;
17637     ufunc_T	**sorttab;
17638     int		st_len = 0;
17639 
17640     todo = func_hashtab.ht_used;
17641     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17642 
17643     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17644     {
17645 	if (!HASHITEM_EMPTY(hi))
17646 	{
17647 	    --todo;
17648 	    fp = HI2UF(hi);
17649 	    if (fp->uf_profiling)
17650 	    {
17651 		if (sorttab != NULL)
17652 		    sorttab[st_len++] = fp;
17653 
17654 		if (fp->uf_name[0] == K_SPECIAL)
17655 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17656 		else
17657 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17658 		if (fp->uf_tm_count == 1)
17659 		    fprintf(fd, "Called 1 time\n");
17660 		else
17661 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17662 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17663 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17664 		fprintf(fd, "\n");
17665 		fprintf(fd, "count  total (s)   self (s)\n");
17666 
17667 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17668 		{
17669 		    prof_func_line(fd, fp->uf_tml_count[i],
17670 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17671 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17672 		}
17673 		fprintf(fd, "\n");
17674 	    }
17675 	}
17676     }
17677 
17678     if (sorttab != NULL && st_len > 0)
17679     {
17680 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17681 							      prof_total_cmp);
17682 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17683 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17684 							      prof_self_cmp);
17685 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17686     }
17687 }
17688 
17689     static void
17690 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17691     FILE	*fd;
17692     ufunc_T	**sorttab;
17693     int		st_len;
17694     char	*title;
17695     int		prefer_self;	/* when equal print only self time */
17696 {
17697     int		i;
17698     ufunc_T	*fp;
17699 
17700     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17701     fprintf(fd, "count  total (s)   self (s)  function\n");
17702     for (i = 0; i < 20 && i < st_len; ++i)
17703     {
17704 	fp = sorttab[i];
17705 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17706 								 prefer_self);
17707 	if (fp->uf_name[0] == K_SPECIAL)
17708 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17709 	else
17710 	    fprintf(fd, " %s()\n", fp->uf_name);
17711     }
17712     fprintf(fd, "\n");
17713 }
17714 
17715 /*
17716  * Print the count and times for one function or function line.
17717  */
17718     static void
17719 prof_func_line(fd, count, total, self, prefer_self)
17720     FILE	*fd;
17721     int		count;
17722     proftime_T	*total;
17723     proftime_T	*self;
17724     int		prefer_self;	/* when equal print only self time */
17725 {
17726     if (count > 0)
17727     {
17728 	fprintf(fd, "%5d ", count);
17729 	if (prefer_self && profile_equal(total, self))
17730 	    fprintf(fd, "           ");
17731 	else
17732 	    fprintf(fd, "%s ", profile_msg(total));
17733 	if (!prefer_self && profile_equal(total, self))
17734 	    fprintf(fd, "           ");
17735 	else
17736 	    fprintf(fd, "%s ", profile_msg(self));
17737     }
17738     else
17739 	fprintf(fd, "                            ");
17740 }
17741 
17742 /*
17743  * Compare function for total time sorting.
17744  */
17745     static int
17746 #ifdef __BORLANDC__
17747 _RTLENTRYF
17748 #endif
17749 prof_total_cmp(s1, s2)
17750     const void	*s1;
17751     const void	*s2;
17752 {
17753     ufunc_T	*p1, *p2;
17754 
17755     p1 = *(ufunc_T **)s1;
17756     p2 = *(ufunc_T **)s2;
17757     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17758 }
17759 
17760 /*
17761  * Compare function for self time sorting.
17762  */
17763     static int
17764 #ifdef __BORLANDC__
17765 _RTLENTRYF
17766 #endif
17767 prof_self_cmp(s1, s2)
17768     const void	*s1;
17769     const void	*s2;
17770 {
17771     ufunc_T	*p1, *p2;
17772 
17773     p1 = *(ufunc_T **)s1;
17774     p2 = *(ufunc_T **)s2;
17775     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17776 }
17777 
17778 #endif
17779 
17780 /* The names of packages that once were loaded is remembered. */
17781 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17782 
17783 /*
17784  * If "name" has a package name try autoloading the script for it.
17785  * Return TRUE if a package was loaded.
17786  */
17787     static int
17788 script_autoload(name, reload)
17789     char_u	*name;
17790     int		reload;	    /* load script again when already loaded */
17791 {
17792     char_u	*p;
17793     char_u	*scriptname, *tofree;
17794     int		ret = FALSE;
17795     int		i;
17796 
17797     /* If there is no '#' after name[0] there is no package name. */
17798     p = vim_strchr(name, AUTOLOAD_CHAR);
17799     if (p == NULL || p == name)
17800 	return FALSE;
17801 
17802     tofree = scriptname = autoload_name(name);
17803 
17804     /* Find the name in the list of previously loaded package names.  Skip
17805      * "autoload/", it's always the same. */
17806     for (i = 0; i < ga_loaded.ga_len; ++i)
17807 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
17808 	    break;
17809     if (!reload && i < ga_loaded.ga_len)
17810 	ret = FALSE;	    /* was loaded already */
17811     else
17812     {
17813 	/* Remember the name if it wasn't loaded already. */
17814 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
17815 	{
17816 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
17817 	    tofree = NULL;
17818 	}
17819 
17820 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
17821 	if (source_runtime(scriptname, FALSE) == OK)
17822 	    ret = TRUE;
17823     }
17824 
17825     vim_free(tofree);
17826     return ret;
17827 }
17828 
17829 /*
17830  * Return the autoload script name for a function or variable name.
17831  * Returns NULL when out of memory.
17832  */
17833     static char_u *
17834 autoload_name(name)
17835     char_u	*name;
17836 {
17837     char_u	*p;
17838     char_u	*scriptname;
17839 
17840     /* Get the script file name: replace '#' with '/', append ".vim". */
17841     scriptname = alloc((unsigned)(STRLEN(name) + 14));
17842     if (scriptname == NULL)
17843 	return FALSE;
17844     STRCPY(scriptname, "autoload/");
17845     STRCAT(scriptname, name);
17846     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
17847     STRCAT(scriptname, ".vim");
17848     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
17849 	*p = '/';
17850     return scriptname;
17851 }
17852 
17853 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
17854 
17855 /*
17856  * Function given to ExpandGeneric() to obtain the list of user defined
17857  * function names.
17858  */
17859     char_u *
17860 get_user_func_name(xp, idx)
17861     expand_T	*xp;
17862     int		idx;
17863 {
17864     static long_u	done;
17865     static hashitem_T	*hi;
17866     ufunc_T		*fp;
17867 
17868     if (idx == 0)
17869     {
17870 	done = 0;
17871 	hi = func_hashtab.ht_array;
17872     }
17873     if (done < func_hashtab.ht_used)
17874     {
17875 	if (done++ > 0)
17876 	    ++hi;
17877 	while (HASHITEM_EMPTY(hi))
17878 	    ++hi;
17879 	fp = HI2UF(hi);
17880 
17881 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
17882 	    return fp->uf_name;	/* prevents overflow */
17883 
17884 	cat_func_name(IObuff, fp);
17885 	if (xp->xp_context != EXPAND_USER_FUNC)
17886 	{
17887 	    STRCAT(IObuff, "(");
17888 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
17889 		STRCAT(IObuff, ")");
17890 	}
17891 	return IObuff;
17892     }
17893     return NULL;
17894 }
17895 
17896 #endif /* FEAT_CMDL_COMPL */
17897 
17898 /*
17899  * Copy the function name of "fp" to buffer "buf".
17900  * "buf" must be able to hold the function name plus three bytes.
17901  * Takes care of script-local function names.
17902  */
17903     static void
17904 cat_func_name(buf, fp)
17905     char_u	*buf;
17906     ufunc_T	*fp;
17907 {
17908     if (fp->uf_name[0] == K_SPECIAL)
17909     {
17910 	STRCPY(buf, "<SNR>");
17911 	STRCAT(buf, fp->uf_name + 3);
17912     }
17913     else
17914 	STRCPY(buf, fp->uf_name);
17915 }
17916 
17917 /*
17918  * ":delfunction {name}"
17919  */
17920     void
17921 ex_delfunction(eap)
17922     exarg_T	*eap;
17923 {
17924     ufunc_T	*fp = NULL;
17925     char_u	*p;
17926     char_u	*name;
17927     funcdict_T	fudi;
17928 
17929     p = eap->arg;
17930     name = trans_function_name(&p, eap->skip, 0, &fudi);
17931     vim_free(fudi.fd_newkey);
17932     if (name == NULL)
17933     {
17934 	if (fudi.fd_dict != NULL && !eap->skip)
17935 	    EMSG(_(e_funcref));
17936 	return;
17937     }
17938     if (!ends_excmd(*skipwhite(p)))
17939     {
17940 	vim_free(name);
17941 	EMSG(_(e_trailing));
17942 	return;
17943     }
17944     eap->nextcmd = check_nextcmd(p);
17945     if (eap->nextcmd != NULL)
17946 	*p = NUL;
17947 
17948     if (!eap->skip)
17949 	fp = find_func(name);
17950     vim_free(name);
17951 
17952     if (!eap->skip)
17953     {
17954 	if (fp == NULL)
17955 	{
17956 	    EMSG2(_(e_nofunc), eap->arg);
17957 	    return;
17958 	}
17959 	if (fp->uf_calls > 0)
17960 	{
17961 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
17962 	    return;
17963 	}
17964 
17965 	if (fudi.fd_dict != NULL)
17966 	{
17967 	    /* Delete the dict item that refers to the function, it will
17968 	     * invoke func_unref() and possibly delete the function. */
17969 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
17970 	}
17971 	else
17972 	    func_free(fp);
17973     }
17974 }
17975 
17976 /*
17977  * Free a function and remove it from the list of functions.
17978  */
17979     static void
17980 func_free(fp)
17981     ufunc_T *fp;
17982 {
17983     hashitem_T	*hi;
17984 
17985     /* clear this function */
17986     ga_clear_strings(&(fp->uf_args));
17987     ga_clear_strings(&(fp->uf_lines));
17988 #ifdef FEAT_PROFILE
17989     vim_free(fp->uf_tml_count);
17990     vim_free(fp->uf_tml_total);
17991     vim_free(fp->uf_tml_self);
17992 #endif
17993 
17994     /* remove the function from the function hashtable */
17995     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
17996     if (HASHITEM_EMPTY(hi))
17997 	EMSG2(_(e_intern2), "func_free()");
17998     else
17999 	hash_remove(&func_hashtab, hi);
18000 
18001     vim_free(fp);
18002 }
18003 
18004 /*
18005  * Unreference a Function: decrement the reference count and free it when it
18006  * becomes zero.  Only for numbered functions.
18007  */
18008     static void
18009 func_unref(name)
18010     char_u	*name;
18011 {
18012     ufunc_T *fp;
18013 
18014     if (name != NULL && isdigit(*name))
18015     {
18016 	fp = find_func(name);
18017 	if (fp == NULL)
18018 	    EMSG2(_(e_intern2), "func_unref()");
18019 	else if (--fp->uf_refcount <= 0)
18020 	{
18021 	    /* Only delete it when it's not being used.  Otherwise it's done
18022 	     * when "uf_calls" becomes zero. */
18023 	    if (fp->uf_calls == 0)
18024 		func_free(fp);
18025 	}
18026     }
18027 }
18028 
18029 /*
18030  * Count a reference to a Function.
18031  */
18032     static void
18033 func_ref(name)
18034     char_u	*name;
18035 {
18036     ufunc_T *fp;
18037 
18038     if (name != NULL && isdigit(*name))
18039     {
18040 	fp = find_func(name);
18041 	if (fp == NULL)
18042 	    EMSG2(_(e_intern2), "func_ref()");
18043 	else
18044 	    ++fp->uf_refcount;
18045     }
18046 }
18047 
18048 /*
18049  * Call a user function.
18050  */
18051     static void
18052 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
18053     ufunc_T	*fp;		/* pointer to function */
18054     int		argcount;	/* nr of args */
18055     typval_T	*argvars;	/* arguments */
18056     typval_T	*rettv;		/* return value */
18057     linenr_T	firstline;	/* first line of range */
18058     linenr_T	lastline;	/* last line of range */
18059     dict_T	*selfdict;	/* Dictionary for "self" */
18060 {
18061     char_u	*save_sourcing_name;
18062     linenr_T	save_sourcing_lnum;
18063     scid_T	save_current_SID;
18064     funccall_T	fc;
18065     int		save_did_emsg;
18066     static int	depth = 0;
18067     dictitem_T	*v;
18068     int		fixvar_idx = 0;	/* index in fixvar[] */
18069     int		i;
18070     int		ai;
18071     char_u	numbuf[NUMBUFLEN];
18072     char_u	*name;
18073 #ifdef FEAT_PROFILE
18074     proftime_T	wait_start;
18075 #endif
18076 
18077     /* If depth of calling is getting too high, don't execute the function */
18078     if (depth >= p_mfd)
18079     {
18080 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
18081 	rettv->v_type = VAR_NUMBER;
18082 	rettv->vval.v_number = -1;
18083 	return;
18084     }
18085     ++depth;
18086 
18087     line_breakcheck();		/* check for CTRL-C hit */
18088 
18089     fc.caller = current_funccal;
18090     current_funccal = &fc;
18091     fc.func = fp;
18092     fc.rettv = rettv;
18093     rettv->vval.v_number = 0;
18094     fc.linenr = 0;
18095     fc.returned = FALSE;
18096     fc.level = ex_nesting_level;
18097     /* Check if this function has a breakpoint. */
18098     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
18099     fc.dbg_tick = debug_tick;
18100 
18101     /*
18102      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
18103      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
18104      * each argument variable and saves a lot of time.
18105      */
18106     /*
18107      * Init l: variables.
18108      */
18109     init_var_dict(&fc.l_vars, &fc.l_vars_var);
18110     if (selfdict != NULL)
18111     {
18112 	/* Set l:self to "selfdict". */
18113 	v = &fc.fixvar[fixvar_idx++].var;
18114 	STRCPY(v->di_key, "self");
18115 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
18116 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
18117 	v->di_tv.v_type = VAR_DICT;
18118 	v->di_tv.v_lock = 0;
18119 	v->di_tv.vval.v_dict = selfdict;
18120 	++selfdict->dv_refcount;
18121     }
18122 
18123     /*
18124      * Init a: variables.
18125      * Set a:0 to "argcount".
18126      * Set a:000 to a list with room for the "..." arguments.
18127      */
18128     init_var_dict(&fc.l_avars, &fc.l_avars_var);
18129     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
18130 				(varnumber_T)(argcount - fp->uf_args.ga_len));
18131     v = &fc.fixvar[fixvar_idx++].var;
18132     STRCPY(v->di_key, "000");
18133     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18134     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18135     v->di_tv.v_type = VAR_LIST;
18136     v->di_tv.v_lock = VAR_FIXED;
18137     v->di_tv.vval.v_list = &fc.l_varlist;
18138     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
18139     fc.l_varlist.lv_refcount = 99999;
18140 
18141     /*
18142      * Set a:firstline to "firstline" and a:lastline to "lastline".
18143      * Set a:name to named arguments.
18144      * Set a:N to the "..." arguments.
18145      */
18146     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
18147 						      (varnumber_T)firstline);
18148     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
18149 						       (varnumber_T)lastline);
18150     for (i = 0; i < argcount; ++i)
18151     {
18152 	ai = i - fp->uf_args.ga_len;
18153 	if (ai < 0)
18154 	    /* named argument a:name */
18155 	    name = FUNCARG(fp, i);
18156 	else
18157 	{
18158 	    /* "..." argument a:1, a:2, etc. */
18159 	    sprintf((char *)numbuf, "%d", ai + 1);
18160 	    name = numbuf;
18161 	}
18162 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
18163 	{
18164 	    v = &fc.fixvar[fixvar_idx++].var;
18165 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18166 	}
18167 	else
18168 	{
18169 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
18170 							     + STRLEN(name)));
18171 	    if (v == NULL)
18172 		break;
18173 	    v->di_flags = DI_FLAGS_RO;
18174 	}
18175 	STRCPY(v->di_key, name);
18176 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18177 
18178 	/* Note: the values are copied directly to avoid alloc/free.
18179 	 * "argvars" must have VAR_FIXED for v_lock. */
18180 	v->di_tv = argvars[i];
18181 	v->di_tv.v_lock = VAR_FIXED;
18182 
18183 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
18184 	{
18185 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18186 	    fc.l_listitems[ai].li_tv = argvars[i];
18187 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18188 	}
18189     }
18190 
18191     /* Don't redraw while executing the function. */
18192     ++RedrawingDisabled;
18193     save_sourcing_name = sourcing_name;
18194     save_sourcing_lnum = sourcing_lnum;
18195     sourcing_lnum = 1;
18196     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18197 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18198     if (sourcing_name != NULL)
18199     {
18200 	if (save_sourcing_name != NULL
18201 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18202 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18203 	else
18204 	    STRCPY(sourcing_name, "function ");
18205 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18206 
18207 	if (p_verbose >= 12)
18208 	{
18209 	    ++no_wait_return;
18210 	    verbose_enter_scroll();
18211 
18212 	    smsg((char_u *)_("calling %s"), sourcing_name);
18213 	    if (p_verbose >= 14)
18214 	    {
18215 		char_u	buf[MSG_BUF_LEN];
18216 		char_u	numbuf[NUMBUFLEN];
18217 		char_u	*tofree;
18218 
18219 		msg_puts((char_u *)"(");
18220 		for (i = 0; i < argcount; ++i)
18221 		{
18222 		    if (i > 0)
18223 			msg_puts((char_u *)", ");
18224 		    if (argvars[i].v_type == VAR_NUMBER)
18225 			msg_outnum((long)argvars[i].vval.v_number);
18226 		    else
18227 		    {
18228 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18229 							    buf, MSG_BUF_CLEN);
18230 			msg_puts(buf);
18231 			vim_free(tofree);
18232 		    }
18233 		}
18234 		msg_puts((char_u *)")");
18235 	    }
18236 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18237 
18238 	    verbose_leave_scroll();
18239 	    --no_wait_return;
18240 	}
18241     }
18242 #ifdef FEAT_PROFILE
18243     if (do_profiling)
18244     {
18245 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18246 	    func_do_profile(fp);
18247 	if (fp->uf_profiling
18248 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18249 	{
18250 	    ++fp->uf_tm_count;
18251 	    profile_start(&fp->uf_tm_start);
18252 	    profile_zero(&fp->uf_tm_children);
18253 	}
18254 	script_prof_save(&wait_start);
18255     }
18256 #endif
18257 
18258     save_current_SID = current_SID;
18259     current_SID = fp->uf_script_ID;
18260     save_did_emsg = did_emsg;
18261     did_emsg = FALSE;
18262 
18263     /* call do_cmdline() to execute the lines */
18264     do_cmdline(NULL, get_func_line, (void *)&fc,
18265 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18266 
18267     --RedrawingDisabled;
18268 
18269     /* when the function was aborted because of an error, return -1 */
18270     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18271     {
18272 	clear_tv(rettv);
18273 	rettv->v_type = VAR_NUMBER;
18274 	rettv->vval.v_number = -1;
18275     }
18276 
18277 #ifdef FEAT_PROFILE
18278     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18279     {
18280 	profile_end(&fp->uf_tm_start);
18281 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18282 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18283 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18284 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18285 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18286 	{
18287 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18288 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18289 	}
18290     }
18291 #endif
18292 
18293     /* when being verbose, mention the return value */
18294     if (p_verbose >= 12)
18295     {
18296 	++no_wait_return;
18297 	verbose_enter_scroll();
18298 
18299 	if (aborting())
18300 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18301 	else if (fc.rettv->v_type == VAR_NUMBER)
18302 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18303 					       (long)fc.rettv->vval.v_number);
18304 	else
18305 	{
18306 	    char_u	buf[MSG_BUF_LEN];
18307 	    char_u	numbuf[NUMBUFLEN];
18308 	    char_u	*tofree;
18309 
18310 	    /* The value may be very long.  Skip the middle part, so that we
18311 	     * have some idea how it starts and ends. smsg() would always
18312 	     * truncate it at the end. */
18313 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18314 							   buf, MSG_BUF_CLEN);
18315 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18316 	    vim_free(tofree);
18317 	}
18318 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18319 
18320 	verbose_leave_scroll();
18321 	--no_wait_return;
18322     }
18323 
18324     vim_free(sourcing_name);
18325     sourcing_name = save_sourcing_name;
18326     sourcing_lnum = save_sourcing_lnum;
18327     current_SID = save_current_SID;
18328 #ifdef FEAT_PROFILE
18329     if (do_profiling)
18330 	script_prof_restore(&wait_start);
18331 #endif
18332 
18333     if (p_verbose >= 12 && sourcing_name != NULL)
18334     {
18335 	++no_wait_return;
18336 	verbose_enter_scroll();
18337 
18338 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18339 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18340 
18341 	verbose_leave_scroll();
18342 	--no_wait_return;
18343     }
18344 
18345     did_emsg |= save_did_emsg;
18346     current_funccal = fc.caller;
18347 
18348     /* The a: variables typevals were not alloced, only free the allocated
18349      * variables. */
18350     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18351 
18352     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18353     --depth;
18354 }
18355 
18356 /*
18357  * Add a number variable "name" to dict "dp" with value "nr".
18358  */
18359     static void
18360 add_nr_var(dp, v, name, nr)
18361     dict_T	*dp;
18362     dictitem_T	*v;
18363     char	*name;
18364     varnumber_T nr;
18365 {
18366     STRCPY(v->di_key, name);
18367     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18368     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18369     v->di_tv.v_type = VAR_NUMBER;
18370     v->di_tv.v_lock = VAR_FIXED;
18371     v->di_tv.vval.v_number = nr;
18372 }
18373 
18374 /*
18375  * ":return [expr]"
18376  */
18377     void
18378 ex_return(eap)
18379     exarg_T	*eap;
18380 {
18381     char_u	*arg = eap->arg;
18382     typval_T	rettv;
18383     int		returning = FALSE;
18384 
18385     if (current_funccal == NULL)
18386     {
18387 	EMSG(_("E133: :return not inside a function"));
18388 	return;
18389     }
18390 
18391     if (eap->skip)
18392 	++emsg_skip;
18393 
18394     eap->nextcmd = NULL;
18395     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18396 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18397     {
18398 	if (!eap->skip)
18399 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18400 	else
18401 	    clear_tv(&rettv);
18402     }
18403     /* It's safer to return also on error. */
18404     else if (!eap->skip)
18405     {
18406 	/*
18407 	 * Return unless the expression evaluation has been cancelled due to an
18408 	 * aborting error, an interrupt, or an exception.
18409 	 */
18410 	if (!aborting())
18411 	    returning = do_return(eap, FALSE, TRUE, NULL);
18412     }
18413 
18414     /* When skipping or the return gets pending, advance to the next command
18415      * in this line (!returning).  Otherwise, ignore the rest of the line.
18416      * Following lines will be ignored by get_func_line(). */
18417     if (returning)
18418 	eap->nextcmd = NULL;
18419     else if (eap->nextcmd == NULL)	    /* no argument */
18420 	eap->nextcmd = check_nextcmd(arg);
18421 
18422     if (eap->skip)
18423 	--emsg_skip;
18424 }
18425 
18426 /*
18427  * Return from a function.  Possibly makes the return pending.  Also called
18428  * for a pending return at the ":endtry" or after returning from an extra
18429  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18430  * when called due to a ":return" command.  "rettv" may point to a typval_T
18431  * with the return rettv.  Returns TRUE when the return can be carried out,
18432  * FALSE when the return gets pending.
18433  */
18434     int
18435 do_return(eap, reanimate, is_cmd, rettv)
18436     exarg_T	*eap;
18437     int		reanimate;
18438     int		is_cmd;
18439     void	*rettv;
18440 {
18441     int		idx;
18442     struct condstack *cstack = eap->cstack;
18443 
18444     if (reanimate)
18445 	/* Undo the return. */
18446 	current_funccal->returned = FALSE;
18447 
18448     /*
18449      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18450      * not in its finally clause (which then is to be executed next) is found.
18451      * In this case, make the ":return" pending for execution at the ":endtry".
18452      * Otherwise, return normally.
18453      */
18454     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18455     if (idx >= 0)
18456     {
18457 	cstack->cs_pending[idx] = CSTP_RETURN;
18458 
18459 	if (!is_cmd && !reanimate)
18460 	    /* A pending return again gets pending.  "rettv" points to an
18461 	     * allocated variable with the rettv of the original ":return"'s
18462 	     * argument if present or is NULL else. */
18463 	    cstack->cs_rettv[idx] = rettv;
18464 	else
18465 	{
18466 	    /* When undoing a return in order to make it pending, get the stored
18467 	     * return rettv. */
18468 	    if (reanimate)
18469 		rettv = current_funccal->rettv;
18470 
18471 	    if (rettv != NULL)
18472 	    {
18473 		/* Store the value of the pending return. */
18474 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18475 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18476 		else
18477 		    EMSG(_(e_outofmem));
18478 	    }
18479 	    else
18480 		cstack->cs_rettv[idx] = NULL;
18481 
18482 	    if (reanimate)
18483 	    {
18484 		/* The pending return value could be overwritten by a ":return"
18485 		 * without argument in a finally clause; reset the default
18486 		 * return value. */
18487 		current_funccal->rettv->v_type = VAR_NUMBER;
18488 		current_funccal->rettv->vval.v_number = 0;
18489 	    }
18490 	}
18491 	report_make_pending(CSTP_RETURN, rettv);
18492     }
18493     else
18494     {
18495 	current_funccal->returned = TRUE;
18496 
18497 	/* If the return is carried out now, store the return value.  For
18498 	 * a return immediately after reanimation, the value is already
18499 	 * there. */
18500 	if (!reanimate && rettv != NULL)
18501 	{
18502 	    clear_tv(current_funccal->rettv);
18503 	    *current_funccal->rettv = *(typval_T *)rettv;
18504 	    if (!is_cmd)
18505 		vim_free(rettv);
18506 	}
18507     }
18508 
18509     return idx < 0;
18510 }
18511 
18512 /*
18513  * Free the variable with a pending return value.
18514  */
18515     void
18516 discard_pending_return(rettv)
18517     void	*rettv;
18518 {
18519     free_tv((typval_T *)rettv);
18520 }
18521 
18522 /*
18523  * Generate a return command for producing the value of "rettv".  The result
18524  * is an allocated string.  Used by report_pending() for verbose messages.
18525  */
18526     char_u *
18527 get_return_cmd(rettv)
18528     void	*rettv;
18529 {
18530     char_u	*s = NULL;
18531     char_u	*tofree = NULL;
18532     char_u	numbuf[NUMBUFLEN];
18533 
18534     if (rettv != NULL)
18535 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18536     if (s == NULL)
18537 	s = (char_u *)"";
18538 
18539     STRCPY(IObuff, ":return ");
18540     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18541     if (STRLEN(s) + 8 >= IOSIZE)
18542 	STRCPY(IObuff + IOSIZE - 4, "...");
18543     vim_free(tofree);
18544     return vim_strsave(IObuff);
18545 }
18546 
18547 /*
18548  * Get next function line.
18549  * Called by do_cmdline() to get the next line.
18550  * Returns allocated string, or NULL for end of function.
18551  */
18552 /* ARGSUSED */
18553     char_u *
18554 get_func_line(c, cookie, indent)
18555     int	    c;		    /* not used */
18556     void    *cookie;
18557     int	    indent;	    /* not used */
18558 {
18559     funccall_T	*fcp = (funccall_T *)cookie;
18560     ufunc_T	*fp = fcp->func;
18561     char_u	*retval;
18562     garray_T	*gap;  /* growarray with function lines */
18563 
18564     /* If breakpoints have been added/deleted need to check for it. */
18565     if (fcp->dbg_tick != debug_tick)
18566     {
18567 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18568 							       sourcing_lnum);
18569 	fcp->dbg_tick = debug_tick;
18570     }
18571 #ifdef FEAT_PROFILE
18572     if (do_profiling)
18573 	func_line_end(cookie);
18574 #endif
18575 
18576     gap = &fp->uf_lines;
18577     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18578 	retval = NULL;
18579     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18580 	retval = NULL;
18581     else
18582     {
18583 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18584 	sourcing_lnum = fcp->linenr;
18585 #ifdef FEAT_PROFILE
18586 	if (do_profiling)
18587 	    func_line_start(cookie);
18588 #endif
18589     }
18590 
18591     /* Did we encounter a breakpoint? */
18592     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18593     {
18594 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18595 	/* Find next breakpoint. */
18596 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18597 							       sourcing_lnum);
18598 	fcp->dbg_tick = debug_tick;
18599     }
18600 
18601     return retval;
18602 }
18603 
18604 #if defined(FEAT_PROFILE) || defined(PROTO)
18605 /*
18606  * Called when starting to read a function line.
18607  * "sourcing_lnum" must be correct!
18608  * When skipping lines it may not actually be executed, but we won't find out
18609  * until later and we need to store the time now.
18610  */
18611     void
18612 func_line_start(cookie)
18613     void    *cookie;
18614 {
18615     funccall_T	*fcp = (funccall_T *)cookie;
18616     ufunc_T	*fp = fcp->func;
18617 
18618     if (fp->uf_profiling && sourcing_lnum >= 1
18619 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18620     {
18621 	fp->uf_tml_idx = sourcing_lnum - 1;
18622 	fp->uf_tml_execed = FALSE;
18623 	profile_start(&fp->uf_tml_start);
18624 	profile_zero(&fp->uf_tml_children);
18625 	profile_get_wait(&fp->uf_tml_wait);
18626     }
18627 }
18628 
18629 /*
18630  * Called when actually executing a function line.
18631  */
18632     void
18633 func_line_exec(cookie)
18634     void    *cookie;
18635 {
18636     funccall_T	*fcp = (funccall_T *)cookie;
18637     ufunc_T	*fp = fcp->func;
18638 
18639     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18640 	fp->uf_tml_execed = TRUE;
18641 }
18642 
18643 /*
18644  * Called when done with a function line.
18645  */
18646     void
18647 func_line_end(cookie)
18648     void    *cookie;
18649 {
18650     funccall_T	*fcp = (funccall_T *)cookie;
18651     ufunc_T	*fp = fcp->func;
18652 
18653     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18654     {
18655 	if (fp->uf_tml_execed)
18656 	{
18657 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18658 	    profile_end(&fp->uf_tml_start);
18659 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18660 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18661 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18662 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18663 	}
18664 	fp->uf_tml_idx = -1;
18665     }
18666 }
18667 #endif
18668 
18669 /*
18670  * Return TRUE if the currently active function should be ended, because a
18671  * return was encountered or an error occured.  Used inside a ":while".
18672  */
18673     int
18674 func_has_ended(cookie)
18675     void    *cookie;
18676 {
18677     funccall_T  *fcp = (funccall_T *)cookie;
18678 
18679     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18680      * an error inside a try conditional. */
18681     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18682 	    || fcp->returned);
18683 }
18684 
18685 /*
18686  * return TRUE if cookie indicates a function which "abort"s on errors.
18687  */
18688     int
18689 func_has_abort(cookie)
18690     void    *cookie;
18691 {
18692     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18693 }
18694 
18695 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18696 typedef enum
18697 {
18698     VAR_FLAVOUR_DEFAULT,
18699     VAR_FLAVOUR_SESSION,
18700     VAR_FLAVOUR_VIMINFO
18701 } var_flavour_T;
18702 
18703 static var_flavour_T var_flavour __ARGS((char_u *varname));
18704 
18705     static var_flavour_T
18706 var_flavour(varname)
18707     char_u *varname;
18708 {
18709     char_u *p = varname;
18710 
18711     if (ASCII_ISUPPER(*p))
18712     {
18713 	while (*(++p))
18714 	    if (ASCII_ISLOWER(*p))
18715 		return VAR_FLAVOUR_SESSION;
18716 	return VAR_FLAVOUR_VIMINFO;
18717     }
18718     else
18719 	return VAR_FLAVOUR_DEFAULT;
18720 }
18721 #endif
18722 
18723 #if defined(FEAT_VIMINFO) || defined(PROTO)
18724 /*
18725  * Restore global vars that start with a capital from the viminfo file
18726  */
18727     int
18728 read_viminfo_varlist(virp, writing)
18729     vir_T	*virp;
18730     int		writing;
18731 {
18732     char_u	*tab;
18733     int		is_string = FALSE;
18734     typval_T	tv;
18735 
18736     if (!writing && (find_viminfo_parameter('!') != NULL))
18737     {
18738 	tab = vim_strchr(virp->vir_line + 1, '\t');
18739 	if (tab != NULL)
18740 	{
18741 	    *tab++ = '\0';	/* isolate the variable name */
18742 	    if (*tab == 'S')	/* string var */
18743 		is_string = TRUE;
18744 
18745 	    tab = vim_strchr(tab, '\t');
18746 	    if (tab != NULL)
18747 	    {
18748 		if (is_string)
18749 		{
18750 		    tv.v_type = VAR_STRING;
18751 		    tv.vval.v_string = viminfo_readstring(virp,
18752 				       (int)(tab - virp->vir_line + 1), TRUE);
18753 		}
18754 		else
18755 		{
18756 		    tv.v_type = VAR_NUMBER;
18757 		    tv.vval.v_number = atol((char *)tab + 1);
18758 		}
18759 		set_var(virp->vir_line + 1, &tv, FALSE);
18760 		if (is_string)
18761 		    vim_free(tv.vval.v_string);
18762 	    }
18763 	}
18764     }
18765 
18766     return viminfo_readline(virp);
18767 }
18768 
18769 /*
18770  * Write global vars that start with a capital to the viminfo file
18771  */
18772     void
18773 write_viminfo_varlist(fp)
18774     FILE    *fp;
18775 {
18776     hashitem_T	*hi;
18777     dictitem_T	*this_var;
18778     int		todo;
18779     char	*s;
18780     char_u	*p;
18781     char_u	*tofree;
18782     char_u	numbuf[NUMBUFLEN];
18783 
18784     if (find_viminfo_parameter('!') == NULL)
18785 	return;
18786 
18787     fprintf(fp, _("\n# global variables:\n"));
18788 
18789     todo = globvarht.ht_used;
18790     for (hi = globvarht.ht_array; todo > 0; ++hi)
18791     {
18792 	if (!HASHITEM_EMPTY(hi))
18793 	{
18794 	    --todo;
18795 	    this_var = HI2DI(hi);
18796 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18797 	    {
18798 		switch (this_var->di_tv.v_type)
18799 		{
18800 		    case VAR_STRING: s = "STR"; break;
18801 		    case VAR_NUMBER: s = "NUM"; break;
18802 		    default: continue;
18803 		}
18804 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
18805 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
18806 		if (p != NULL)
18807 		    viminfo_writestring(fp, p);
18808 		vim_free(tofree);
18809 	    }
18810 	}
18811     }
18812 }
18813 #endif
18814 
18815 #if defined(FEAT_SESSION) || defined(PROTO)
18816     int
18817 store_session_globals(fd)
18818     FILE	*fd;
18819 {
18820     hashitem_T	*hi;
18821     dictitem_T	*this_var;
18822     int		todo;
18823     char_u	*p, *t;
18824 
18825     todo = globvarht.ht_used;
18826     for (hi = globvarht.ht_array; todo > 0; ++hi)
18827     {
18828 	if (!HASHITEM_EMPTY(hi))
18829 	{
18830 	    --todo;
18831 	    this_var = HI2DI(hi);
18832 	    if ((this_var->di_tv.v_type == VAR_NUMBER
18833 			|| this_var->di_tv.v_type == VAR_STRING)
18834 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
18835 	    {
18836 		/* Escape special characters with a backslash.  Turn a LF and
18837 		 * CR into \n and \r. */
18838 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
18839 							(char_u *)"\\\"\n\r");
18840 		if (p == NULL)	    /* out of memory */
18841 		    break;
18842 		for (t = p; *t != NUL; ++t)
18843 		    if (*t == '\n')
18844 			*t = 'n';
18845 		    else if (*t == '\r')
18846 			*t = 'r';
18847 		if ((fprintf(fd, "let %s = %c%s%c",
18848 				this_var->di_key,
18849 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18850 									: ' ',
18851 				p,
18852 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18853 								   : ' ') < 0)
18854 			|| put_eol(fd) == FAIL)
18855 		{
18856 		    vim_free(p);
18857 		    return FAIL;
18858 		}
18859 		vim_free(p);
18860 	    }
18861 	}
18862     }
18863     return OK;
18864 }
18865 #endif
18866 
18867 /*
18868  * Display script name where an item was last set.
18869  * Should only be invoked when 'verbose' is non-zero.
18870  */
18871     void
18872 last_set_msg(scriptID)
18873     scid_T scriptID;
18874 {
18875     if (scriptID != 0)
18876     {
18877 	verbose_enter();
18878 	MSG_PUTS(_("\n\tLast set from "));
18879 	MSG_PUTS(get_scriptname(scriptID));
18880 	verbose_leave();
18881     }
18882 }
18883 
18884 #endif /* FEAT_EVAL */
18885 
18886 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
18887 
18888 
18889 #ifdef WIN3264
18890 /*
18891  * Functions for ":8" filename modifier: get 8.3 version of a filename.
18892  */
18893 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18894 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
18895 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18896 
18897 /*
18898  * Get the short pathname of a file.
18899  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
18900  */
18901     static int
18902 get_short_pathname(fnamep, bufp, fnamelen)
18903     char_u	**fnamep;
18904     char_u	**bufp;
18905     int		*fnamelen;
18906 {
18907     int		l,len;
18908     char_u	*newbuf;
18909 
18910     len = *fnamelen;
18911 
18912     l = GetShortPathName(*fnamep, *fnamep, len);
18913     if (l > len - 1)
18914     {
18915 	/* If that doesn't work (not enough space), then save the string
18916 	 * and try again with a new buffer big enough
18917 	 */
18918 	newbuf = vim_strnsave(*fnamep, l);
18919 	if (newbuf == NULL)
18920 	    return 0;
18921 
18922 	vim_free(*bufp);
18923 	*fnamep = *bufp = newbuf;
18924 
18925 	l = GetShortPathName(*fnamep,*fnamep,l+1);
18926 
18927 	/* Really should always succeed, as the buffer is big enough */
18928     }
18929 
18930     *fnamelen = l;
18931     return 1;
18932 }
18933 
18934 /*
18935  * Create a short path name.  Returns the length of the buffer it needs.
18936  * Doesn't copy over the end of the buffer passed in.
18937  */
18938     static int
18939 shortpath_for_invalid_fname(fname, bufp, fnamelen)
18940     char_u	**fname;
18941     char_u	**bufp;
18942     int		*fnamelen;
18943 {
18944     char_u	*s, *p, *pbuf2, *pbuf3;
18945     char_u	ch;
18946     int		len, len2, plen, slen;
18947 
18948     /* Make a copy */
18949     len2 = *fnamelen;
18950     pbuf2 = vim_strnsave(*fname, len2);
18951     pbuf3 = NULL;
18952 
18953     s = pbuf2 + len2 - 1; /* Find the end */
18954     slen = 1;
18955     plen = len2;
18956 
18957     if (after_pathsep(pbuf2, s + 1))
18958     {
18959 	--s;
18960 	++slen;
18961 	--plen;
18962     }
18963 
18964     do
18965     {
18966 	/* Go back one path-seperator */
18967 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
18968 	{
18969 	    --s;
18970 	    ++slen;
18971 	    --plen;
18972 	}
18973 	if (s <= pbuf2)
18974 	    break;
18975 
18976 	/* Remeber the character that is about to be blatted */
18977 	ch = *s;
18978 	*s = 0; /* get_short_pathname requires a null-terminated string */
18979 
18980 	/* Try it in situ */
18981 	p = pbuf2;
18982 	if (!get_short_pathname(&p, &pbuf3, &plen))
18983 	{
18984 	    vim_free(pbuf2);
18985 	    return -1;
18986 	}
18987 	*s = ch;    /* Preserve the string */
18988     } while (plen == 0);
18989 
18990     if (plen > 0)
18991     {
18992 	/* Remeber the length of the new string.  */
18993 	*fnamelen = len = plen + slen;
18994 	vim_free(*bufp);
18995 	if (len > len2)
18996 	{
18997 	    /* If there's not enough space in the currently allocated string,
18998 	     * then copy it to a buffer big enough.
18999 	     */
19000 	    *fname= *bufp = vim_strnsave(p, len);
19001 	    if (*fname == NULL)
19002 		return -1;
19003 	}
19004 	else
19005 	{
19006 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
19007 	    *fname = *bufp = pbuf2;
19008 	    if (p != pbuf2)
19009 		strncpy(*fname, p, plen);
19010 	    pbuf2 = NULL;
19011 	}
19012 	/* Concat the next bit */
19013 	strncpy(*fname + plen, s, slen);
19014 	(*fname)[len] = '\0';
19015     }
19016     vim_free(pbuf3);
19017     vim_free(pbuf2);
19018     return 0;
19019 }
19020 
19021 /*
19022  * Get a pathname for a partial path.
19023  */
19024     static int
19025 shortpath_for_partial(fnamep, bufp, fnamelen)
19026     char_u	**fnamep;
19027     char_u	**bufp;
19028     int		*fnamelen;
19029 {
19030     int		sepcount, len, tflen;
19031     char_u	*p;
19032     char_u	*pbuf, *tfname;
19033     int		hasTilde;
19034 
19035     /* Count up the path seperators from the RHS.. so we know which part
19036      * of the path to return.
19037      */
19038     sepcount = 0;
19039     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
19040 	if (vim_ispathsep(*p))
19041 	    ++sepcount;
19042 
19043     /* Need full path first (use expand_env() to remove a "~/") */
19044     hasTilde = (**fnamep == '~');
19045     if (hasTilde)
19046 	pbuf = tfname = expand_env_save(*fnamep);
19047     else
19048 	pbuf = tfname = FullName_save(*fnamep, FALSE);
19049 
19050     len = tflen = STRLEN(tfname);
19051 
19052     if (!get_short_pathname(&tfname, &pbuf, &len))
19053 	return -1;
19054 
19055     if (len == 0)
19056     {
19057 	/* Don't have a valid filename, so shorten the rest of the
19058 	 * path if we can. This CAN give us invalid 8.3 filenames, but
19059 	 * there's not a lot of point in guessing what it might be.
19060 	 */
19061 	len = tflen;
19062 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
19063 	    return -1;
19064     }
19065 
19066     /* Count the paths backward to find the beginning of the desired string. */
19067     for (p = tfname + len - 1; p >= tfname; --p)
19068     {
19069 #ifdef FEAT_MBYTE
19070 	if (has_mbyte)
19071 	    p -= mb_head_off(tfname, p);
19072 #endif
19073 	if (vim_ispathsep(*p))
19074 	{
19075 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
19076 		break;
19077 	    else
19078 		sepcount --;
19079 	}
19080     }
19081     if (hasTilde)
19082     {
19083 	--p;
19084 	if (p >= tfname)
19085 	    *p = '~';
19086 	else
19087 	    return -1;
19088     }
19089     else
19090 	++p;
19091 
19092     /* Copy in the string - p indexes into tfname - allocated at pbuf */
19093     vim_free(*bufp);
19094     *fnamelen = (int)STRLEN(p);
19095     *bufp = pbuf;
19096     *fnamep = p;
19097 
19098     return 0;
19099 }
19100 #endif /* WIN3264 */
19101 
19102 /*
19103  * Adjust a filename, according to a string of modifiers.
19104  * *fnamep must be NUL terminated when called.  When returning, the length is
19105  * determined by *fnamelen.
19106  * Returns valid flags.
19107  * When there is an error, *fnamep is set to NULL.
19108  */
19109     int
19110 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
19111     char_u	*src;		/* string with modifiers */
19112     int		*usedlen;	/* characters after src that are used */
19113     char_u	**fnamep;	/* file name so far */
19114     char_u	**bufp;		/* buffer for allocated file name or NULL */
19115     int		*fnamelen;	/* length of fnamep */
19116 {
19117     int		valid = 0;
19118     char_u	*tail;
19119     char_u	*s, *p, *pbuf;
19120     char_u	dirname[MAXPATHL];
19121     int		c;
19122     int		has_fullname = 0;
19123 #ifdef WIN3264
19124     int		has_shortname = 0;
19125 #endif
19126 
19127 repeat:
19128     /* ":p" - full path/file_name */
19129     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
19130     {
19131 	has_fullname = 1;
19132 
19133 	valid |= VALID_PATH;
19134 	*usedlen += 2;
19135 
19136 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
19137 	if ((*fnamep)[0] == '~'
19138 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
19139 		&& ((*fnamep)[1] == '/'
19140 # ifdef BACKSLASH_IN_FILENAME
19141 		    || (*fnamep)[1] == '\\'
19142 # endif
19143 		    || (*fnamep)[1] == NUL)
19144 
19145 #endif
19146 	   )
19147 	{
19148 	    *fnamep = expand_env_save(*fnamep);
19149 	    vim_free(*bufp);	/* free any allocated file name */
19150 	    *bufp = *fnamep;
19151 	    if (*fnamep == NULL)
19152 		return -1;
19153 	}
19154 
19155 	/* When "/." or "/.." is used: force expansion to get rid of it. */
19156 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
19157 	{
19158 	    if (vim_ispathsep(*p)
19159 		    && p[1] == '.'
19160 		    && (p[2] == NUL
19161 			|| vim_ispathsep(p[2])
19162 			|| (p[2] == '.'
19163 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
19164 		break;
19165 	}
19166 
19167 	/* FullName_save() is slow, don't use it when not needed. */
19168 	if (*p != NUL || !vim_isAbsName(*fnamep))
19169 	{
19170 	    *fnamep = FullName_save(*fnamep, *p != NUL);
19171 	    vim_free(*bufp);	/* free any allocated file name */
19172 	    *bufp = *fnamep;
19173 	    if (*fnamep == NULL)
19174 		return -1;
19175 	}
19176 
19177 	/* Append a path separator to a directory. */
19178 	if (mch_isdir(*fnamep))
19179 	{
19180 	    /* Make room for one or two extra characters. */
19181 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
19182 	    vim_free(*bufp);	/* free any allocated file name */
19183 	    *bufp = *fnamep;
19184 	    if (*fnamep == NULL)
19185 		return -1;
19186 	    add_pathsep(*fnamep);
19187 	}
19188     }
19189 
19190     /* ":." - path relative to the current directory */
19191     /* ":~" - path relative to the home directory */
19192     /* ":8" - shortname path - postponed till after */
19193     while (src[*usedlen] == ':'
19194 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
19195     {
19196 	*usedlen += 2;
19197 	if (c == '8')
19198 	{
19199 #ifdef WIN3264
19200 	    has_shortname = 1; /* Postpone this. */
19201 #endif
19202 	    continue;
19203 	}
19204 	pbuf = NULL;
19205 	/* Need full path first (use expand_env() to remove a "~/") */
19206 	if (!has_fullname)
19207 	{
19208 	    if (c == '.' && **fnamep == '~')
19209 		p = pbuf = expand_env_save(*fnamep);
19210 	    else
19211 		p = pbuf = FullName_save(*fnamep, FALSE);
19212 	}
19213 	else
19214 	    p = *fnamep;
19215 
19216 	has_fullname = 0;
19217 
19218 	if (p != NULL)
19219 	{
19220 	    if (c == '.')
19221 	    {
19222 		mch_dirname(dirname, MAXPATHL);
19223 		s = shorten_fname(p, dirname);
19224 		if (s != NULL)
19225 		{
19226 		    *fnamep = s;
19227 		    if (pbuf != NULL)
19228 		    {
19229 			vim_free(*bufp);   /* free any allocated file name */
19230 			*bufp = pbuf;
19231 			pbuf = NULL;
19232 		    }
19233 		}
19234 	    }
19235 	    else
19236 	    {
19237 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19238 		/* Only replace it when it starts with '~' */
19239 		if (*dirname == '~')
19240 		{
19241 		    s = vim_strsave(dirname);
19242 		    if (s != NULL)
19243 		    {
19244 			*fnamep = s;
19245 			vim_free(*bufp);
19246 			*bufp = s;
19247 		    }
19248 		}
19249 	    }
19250 	    vim_free(pbuf);
19251 	}
19252     }
19253 
19254     tail = gettail(*fnamep);
19255     *fnamelen = (int)STRLEN(*fnamep);
19256 
19257     /* ":h" - head, remove "/file_name", can be repeated  */
19258     /* Don't remove the first "/" or "c:\" */
19259     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19260     {
19261 	valid |= VALID_HEAD;
19262 	*usedlen += 2;
19263 	s = get_past_head(*fnamep);
19264 	while (tail > s && after_pathsep(s, tail))
19265 	    --tail;
19266 	*fnamelen = (int)(tail - *fnamep);
19267 #ifdef VMS
19268 	if (*fnamelen > 0)
19269 	    *fnamelen += 1; /* the path separator is part of the path */
19270 #endif
19271 	while (tail > s && !after_pathsep(s, tail))
19272 	    mb_ptr_back(*fnamep, tail);
19273     }
19274 
19275     /* ":8" - shortname  */
19276     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19277     {
19278 	*usedlen += 2;
19279 #ifdef WIN3264
19280 	has_shortname = 1;
19281 #endif
19282     }
19283 
19284 #ifdef WIN3264
19285     /* Check shortname after we have done 'heads' and before we do 'tails'
19286      */
19287     if (has_shortname)
19288     {
19289 	pbuf = NULL;
19290 	/* Copy the string if it is shortened by :h */
19291 	if (*fnamelen < (int)STRLEN(*fnamep))
19292 	{
19293 	    p = vim_strnsave(*fnamep, *fnamelen);
19294 	    if (p == 0)
19295 		return -1;
19296 	    vim_free(*bufp);
19297 	    *bufp = *fnamep = p;
19298 	}
19299 
19300 	/* Split into two implementations - makes it easier.  First is where
19301 	 * there isn't a full name already, second is where there is.
19302 	 */
19303 	if (!has_fullname && !vim_isAbsName(*fnamep))
19304 	{
19305 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19306 		return -1;
19307 	}
19308 	else
19309 	{
19310 	    int		l;
19311 
19312 	    /* Simple case, already have the full-name
19313 	     * Nearly always shorter, so try first time. */
19314 	    l = *fnamelen;
19315 	    if (!get_short_pathname(fnamep, bufp, &l))
19316 		return -1;
19317 
19318 	    if (l == 0)
19319 	    {
19320 		/* Couldn't find the filename.. search the paths.
19321 		 */
19322 		l = *fnamelen;
19323 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19324 		    return -1;
19325 	    }
19326 	    *fnamelen = l;
19327 	}
19328     }
19329 #endif /* WIN3264 */
19330 
19331     /* ":t" - tail, just the basename */
19332     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19333     {
19334 	*usedlen += 2;
19335 	*fnamelen -= (int)(tail - *fnamep);
19336 	*fnamep = tail;
19337     }
19338 
19339     /* ":e" - extension, can be repeated */
19340     /* ":r" - root, without extension, can be repeated */
19341     while (src[*usedlen] == ':'
19342 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19343     {
19344 	/* find a '.' in the tail:
19345 	 * - for second :e: before the current fname
19346 	 * - otherwise: The last '.'
19347 	 */
19348 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19349 	    s = *fnamep - 2;
19350 	else
19351 	    s = *fnamep + *fnamelen - 1;
19352 	for ( ; s > tail; --s)
19353 	    if (s[0] == '.')
19354 		break;
19355 	if (src[*usedlen + 1] == 'e')		/* :e */
19356 	{
19357 	    if (s > tail)
19358 	    {
19359 		*fnamelen += (int)(*fnamep - (s + 1));
19360 		*fnamep = s + 1;
19361 #ifdef VMS
19362 		/* cut version from the extension */
19363 		s = *fnamep + *fnamelen - 1;
19364 		for ( ; s > *fnamep; --s)
19365 		    if (s[0] == ';')
19366 			break;
19367 		if (s > *fnamep)
19368 		    *fnamelen = s - *fnamep;
19369 #endif
19370 	    }
19371 	    else if (*fnamep <= tail)
19372 		*fnamelen = 0;
19373 	}
19374 	else				/* :r */
19375 	{
19376 	    if (s > tail)	/* remove one extension */
19377 		*fnamelen = (int)(s - *fnamep);
19378 	}
19379 	*usedlen += 2;
19380     }
19381 
19382     /* ":s?pat?foo?" - substitute */
19383     /* ":gs?pat?foo?" - global substitute */
19384     if (src[*usedlen] == ':'
19385 	    && (src[*usedlen + 1] == 's'
19386 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19387     {
19388 	char_u	    *str;
19389 	char_u	    *pat;
19390 	char_u	    *sub;
19391 	int	    sep;
19392 	char_u	    *flags;
19393 	int	    didit = FALSE;
19394 
19395 	flags = (char_u *)"";
19396 	s = src + *usedlen + 2;
19397 	if (src[*usedlen + 1] == 'g')
19398 	{
19399 	    flags = (char_u *)"g";
19400 	    ++s;
19401 	}
19402 
19403 	sep = *s++;
19404 	if (sep)
19405 	{
19406 	    /* find end of pattern */
19407 	    p = vim_strchr(s, sep);
19408 	    if (p != NULL)
19409 	    {
19410 		pat = vim_strnsave(s, (int)(p - s));
19411 		if (pat != NULL)
19412 		{
19413 		    s = p + 1;
19414 		    /* find end of substitution */
19415 		    p = vim_strchr(s, sep);
19416 		    if (p != NULL)
19417 		    {
19418 			sub = vim_strnsave(s, (int)(p - s));
19419 			str = vim_strnsave(*fnamep, *fnamelen);
19420 			if (sub != NULL && str != NULL)
19421 			{
19422 			    *usedlen = (int)(p + 1 - src);
19423 			    s = do_string_sub(str, pat, sub, flags);
19424 			    if (s != NULL)
19425 			    {
19426 				*fnamep = s;
19427 				*fnamelen = (int)STRLEN(s);
19428 				vim_free(*bufp);
19429 				*bufp = s;
19430 				didit = TRUE;
19431 			    }
19432 			}
19433 			vim_free(sub);
19434 			vim_free(str);
19435 		    }
19436 		    vim_free(pat);
19437 		}
19438 	    }
19439 	    /* after using ":s", repeat all the modifiers */
19440 	    if (didit)
19441 		goto repeat;
19442 	}
19443     }
19444 
19445     return valid;
19446 }
19447 
19448 /*
19449  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19450  * "flags" can be "g" to do a global substitute.
19451  * Returns an allocated string, NULL for error.
19452  */
19453     char_u *
19454 do_string_sub(str, pat, sub, flags)
19455     char_u	*str;
19456     char_u	*pat;
19457     char_u	*sub;
19458     char_u	*flags;
19459 {
19460     int		sublen;
19461     regmatch_T	regmatch;
19462     int		i;
19463     int		do_all;
19464     char_u	*tail;
19465     garray_T	ga;
19466     char_u	*ret;
19467     char_u	*save_cpo;
19468 
19469     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19470     save_cpo = p_cpo;
19471     p_cpo = (char_u *)"";
19472 
19473     ga_init2(&ga, 1, 200);
19474 
19475     do_all = (flags[0] == 'g');
19476 
19477     regmatch.rm_ic = p_ic;
19478     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19479     if (regmatch.regprog != NULL)
19480     {
19481 	tail = str;
19482 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19483 	{
19484 	    /*
19485 	     * Get some space for a temporary buffer to do the substitution
19486 	     * into.  It will contain:
19487 	     * - The text up to where the match is.
19488 	     * - The substituted text.
19489 	     * - The text after the match.
19490 	     */
19491 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19492 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19493 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19494 	    {
19495 		ga_clear(&ga);
19496 		break;
19497 	    }
19498 
19499 	    /* copy the text up to where the match is */
19500 	    i = (int)(regmatch.startp[0] - tail);
19501 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19502 	    /* add the substituted text */
19503 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19504 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19505 	    ga.ga_len += i + sublen - 1;
19506 	    /* avoid getting stuck on a match with an empty string */
19507 	    if (tail == regmatch.endp[0])
19508 	    {
19509 		if (*tail == NUL)
19510 		    break;
19511 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19512 		++ga.ga_len;
19513 	    }
19514 	    else
19515 	    {
19516 		tail = regmatch.endp[0];
19517 		if (*tail == NUL)
19518 		    break;
19519 	    }
19520 	    if (!do_all)
19521 		break;
19522 	}
19523 
19524 	if (ga.ga_data != NULL)
19525 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19526 
19527 	vim_free(regmatch.regprog);
19528     }
19529 
19530     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19531     ga_clear(&ga);
19532     p_cpo = save_cpo;
19533 
19534     return ret;
19535 }
19536 
19537 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19538