xref: /vim-8.2.3635/src/eval.c (revision 34cf2f5f) 
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 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
464 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
465 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
466 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
467 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
468 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
469 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
470 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
472 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
473 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
476 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
477 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
478 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
480 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
481 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
482 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
486 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
558 #ifdef vim_mkdir
559 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
560 #endif
561 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
562 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
563 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
564 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
565 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
594 #ifdef HAVE_STRFTIME
595 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
596 #endif
597 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
626 
627 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum));
628 static int get_env_len __ARGS((char_u **arg));
629 static int get_id_len __ARGS((char_u **arg));
630 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
631 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
632 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
633 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
634 				   valid character */
635 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
636 static int eval_isnamec __ARGS((int c));
637 static int eval_isnamec1 __ARGS((int c));
638 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
639 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
640 static typval_T *alloc_tv __ARGS((void));
641 static typval_T *alloc_string_tv __ARGS((char_u *string));
642 static void free_tv __ARGS((typval_T *varp));
643 static void init_tv __ARGS((typval_T *varp));
644 static long get_tv_number __ARGS((typval_T *varp));
645 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
646 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
647 static char_u *get_tv_string __ARGS((typval_T *varp));
648 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
649 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
650 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
651 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
652 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
653 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
654 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
655 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
656 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
657 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
658 static int var_check_ro __ARGS((int flags, char_u *name));
659 static int tv_check_lock __ARGS((int lock, char_u *name));
660 static void copy_tv __ARGS((typval_T *from, typval_T *to));
661 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
662 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
663 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
664 static int eval_fname_script __ARGS((char_u *p));
665 static int eval_fname_sid __ARGS((char_u *p));
666 static void list_func_head __ARGS((ufunc_T *fp, int indent));
667 static ufunc_T *find_func __ARGS((char_u *name));
668 static int function_exists __ARGS((char_u *name));
669 static int builtin_function __ARGS((char_u *name));
670 #ifdef FEAT_PROFILE
671 static void func_do_profile __ARGS((ufunc_T *fp));
672 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
673 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
674 static int
675 # ifdef __BORLANDC__
676     _RTLENTRYF
677 # endif
678 	prof_total_cmp __ARGS((const void *s1, const void *s2));
679 static int
680 # ifdef __BORLANDC__
681     _RTLENTRYF
682 # endif
683 	prof_self_cmp __ARGS((const void *s1, const void *s2));
684 #endif
685 static int script_autoload __ARGS((char_u *name, int reload));
686 static char_u *autoload_name __ARGS((char_u *name));
687 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
688 static void func_free __ARGS((ufunc_T *fp));
689 static void func_unref __ARGS((char_u *name));
690 static void func_ref __ARGS((char_u *name));
691 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));
692 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
693 
694 /* Character used as separated in autoload function/variable names. */
695 #define AUTOLOAD_CHAR '#'
696 
697 /*
698  * Initialize the global and v: variables.
699  */
700     void
701 eval_init()
702 {
703     int		    i;
704     struct vimvar   *p;
705 
706     init_var_dict(&globvardict, &globvars_var);
707     init_var_dict(&vimvardict, &vimvars_var);
708     hash_init(&compat_hashtab);
709     hash_init(&func_hashtab);
710 
711     for (i = 0; i < VV_LEN; ++i)
712     {
713 	p = &vimvars[i];
714 	STRCPY(p->vv_di.di_key, p->vv_name);
715 	if (p->vv_flags & VV_RO)
716 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
717 	else if (p->vv_flags & VV_RO_SBX)
718 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
719 	else
720 	    p->vv_di.di_flags = DI_FLAGS_FIX;
721 
722 	/* add to v: scope dict, unless the value is not always available */
723 	if (p->vv_type != VAR_UNKNOWN)
724 	    hash_add(&vimvarht, p->vv_di.di_key);
725 	if (p->vv_flags & VV_COMPAT)
726 	    /* add to compat scope dict */
727 	    hash_add(&compat_hashtab, p->vv_di.di_key);
728     }
729 }
730 
731 #if defined(EXITFREE) || defined(PROTO)
732     void
733 eval_clear()
734 {
735     int		    i;
736     struct vimvar   *p;
737 
738     for (i = 0; i < VV_LEN; ++i)
739     {
740 	p = &vimvars[i];
741 	if (p->vv_di.di_tv.v_type == VAR_STRING)
742 	{
743 	    vim_free(p->vv_di.di_tv.vval.v_string);
744 	    p->vv_di.di_tv.vval.v_string = NULL;
745 	}
746     }
747     hash_clear(&vimvarht);
748     hash_clear(&compat_hashtab);
749 
750     /* script-local variables */
751     for (i = 1; i <= ga_scripts.ga_len; ++i)
752 	vars_clear(&SCRIPT_VARS(i));
753     ga_clear(&ga_scripts);
754     free_scriptnames();
755 
756     /* global variables */
757     vars_clear(&globvarht);
758 
759     /* functions */
760     free_all_functions();
761     hash_clear(&func_hashtab);
762 
763     /* unreferenced lists and dicts */
764     (void)garbage_collect();
765 }
766 #endif
767 
768 /*
769  * Return the name of the executed function.
770  */
771     char_u *
772 func_name(cookie)
773     void *cookie;
774 {
775     return ((funccall_T *)cookie)->func->uf_name;
776 }
777 
778 /*
779  * Return the address holding the next breakpoint line for a funccall cookie.
780  */
781     linenr_T *
782 func_breakpoint(cookie)
783     void *cookie;
784 {
785     return &((funccall_T *)cookie)->breakpoint;
786 }
787 
788 /*
789  * Return the address holding the debug tick for a funccall cookie.
790  */
791     int *
792 func_dbg_tick(cookie)
793     void *cookie;
794 {
795     return &((funccall_T *)cookie)->dbg_tick;
796 }
797 
798 /*
799  * Return the nesting level for a funccall cookie.
800  */
801     int
802 func_level(cookie)
803     void *cookie;
804 {
805     return ((funccall_T *)cookie)->level;
806 }
807 
808 /* pointer to funccal for currently active function */
809 funccall_T *current_funccal = NULL;
810 
811 /*
812  * Return TRUE when a function was ended by a ":return" command.
813  */
814     int
815 current_func_returned()
816 {
817     return current_funccal->returned;
818 }
819 
820 
821 /*
822  * Set an internal variable to a string value. Creates the variable if it does
823  * not already exist.
824  */
825     void
826 set_internal_string_var(name, value)
827     char_u	*name;
828     char_u	*value;
829 {
830     char_u	*val;
831     typval_T	*tvp;
832 
833     val = vim_strsave(value);
834     if (val != NULL)
835     {
836 	tvp = alloc_string_tv(val);
837 	if (tvp != NULL)
838 	{
839 	    set_var(name, tvp, FALSE);
840 	    free_tv(tvp);
841 	}
842     }
843 }
844 
845 static lval_T	*redir_lval = NULL;
846 static char_u	*redir_endp = NULL;
847 static char_u	*redir_varname = NULL;
848 
849 /*
850  * Start recording command output to a variable
851  * Returns OK if successfully completed the setup.  FAIL otherwise.
852  */
853     int
854 var_redir_start(name, append)
855     char_u	*name;
856     int		append;		/* append to an existing variable */
857 {
858     int		save_emsg;
859     int		err;
860     typval_T	tv;
861 
862     /* Make sure a valid variable name is specified */
863     if (!eval_isnamec1(*name))
864     {
865 	EMSG(_(e_invarg));
866 	return FAIL;
867     }
868 
869     redir_varname = vim_strsave(name);
870     if (redir_varname == NULL)
871 	return FAIL;
872 
873     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
874     if (redir_lval == NULL)
875     {
876 	var_redir_stop();
877 	return FAIL;
878     }
879 
880     /* Parse the variable name (can be a dict or list entry). */
881     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
882 							     FNE_CHECK_START);
883     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
884     {
885 	if (redir_endp != NULL && *redir_endp != NUL)
886 	    /* Trailing characters are present after the variable name */
887 	    EMSG(_(e_trailing));
888 	else
889 	    EMSG(_(e_invarg));
890 	var_redir_stop();
891 	return FAIL;
892     }
893 
894     /* check if we can write to the variable: set it to or append an empty
895      * string */
896     save_emsg = did_emsg;
897     did_emsg = FALSE;
898     tv.v_type = VAR_STRING;
899     tv.vval.v_string = (char_u *)"";
900     if (append)
901 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
902     else
903 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
904     err = did_emsg;
905     did_emsg += save_emsg;
906     if (err)
907     {
908 	var_redir_stop();
909 	return FAIL;
910     }
911     if (redir_lval->ll_newkey != NULL)
912     {
913 	/* Dictionary item was created, don't do it again. */
914 	vim_free(redir_lval->ll_newkey);
915 	redir_lval->ll_newkey = NULL;
916     }
917 
918     return OK;
919 }
920 
921 /*
922  * Append "value[len]" to the variable set by var_redir_start().
923  */
924     void
925 var_redir_str(value, len)
926     char_u	*value;
927     int		len;
928 {
929     char_u	*val;
930     typval_T	tv;
931     int		save_emsg;
932     int		err;
933 
934     if (redir_lval == NULL)
935 	return;
936 
937     if (len == -1)
938 	/* Append the entire string */
939 	val = vim_strsave(value);
940     else
941 	/* Append only the specified number of characters */
942 	val = vim_strnsave(value, len);
943     if (val == NULL)
944 	return;
945 
946     tv.v_type = VAR_STRING;
947     tv.vval.v_string = val;
948 
949     save_emsg = did_emsg;
950     did_emsg = FALSE;
951     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
952     err = did_emsg;
953     did_emsg += save_emsg;
954     if (err)
955 	var_redir_stop();
956 
957     vim_free(tv.vval.v_string);
958 }
959 
960 /*
961  * Stop redirecting command output to a variable.
962  */
963     void
964 var_redir_stop()
965 {
966     if (redir_lval != NULL)
967     {
968 	clear_lval(redir_lval);
969 	vim_free(redir_lval);
970 	redir_lval = NULL;
971     }
972     vim_free(redir_varname);
973     redir_varname = NULL;
974 }
975 
976 # if defined(FEAT_MBYTE) || defined(PROTO)
977     int
978 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
979     char_u	*enc_from;
980     char_u	*enc_to;
981     char_u	*fname_from;
982     char_u	*fname_to;
983 {
984     int		err = FALSE;
985 
986     set_vim_var_string(VV_CC_FROM, enc_from, -1);
987     set_vim_var_string(VV_CC_TO, enc_to, -1);
988     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
989     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
990     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
991 	err = TRUE;
992     set_vim_var_string(VV_CC_FROM, NULL, -1);
993     set_vim_var_string(VV_CC_TO, NULL, -1);
994     set_vim_var_string(VV_FNAME_IN, NULL, -1);
995     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
996 
997     if (err)
998 	return FAIL;
999     return OK;
1000 }
1001 # endif
1002 
1003 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1004     int
1005 eval_printexpr(fname, args)
1006     char_u	*fname;
1007     char_u	*args;
1008 {
1009     int		err = FALSE;
1010 
1011     set_vim_var_string(VV_FNAME_IN, fname, -1);
1012     set_vim_var_string(VV_CMDARG, args, -1);
1013     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1014 	err = TRUE;
1015     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1016     set_vim_var_string(VV_CMDARG, NULL, -1);
1017 
1018     if (err)
1019     {
1020 	mch_remove(fname);
1021 	return FAIL;
1022     }
1023     return OK;
1024 }
1025 # endif
1026 
1027 # if defined(FEAT_DIFF) || defined(PROTO)
1028     void
1029 eval_diff(origfile, newfile, outfile)
1030     char_u	*origfile;
1031     char_u	*newfile;
1032     char_u	*outfile;
1033 {
1034     int		err = FALSE;
1035 
1036     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1037     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1038     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1039     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1040     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1041     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1042     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1043 }
1044 
1045     void
1046 eval_patch(origfile, difffile, outfile)
1047     char_u	*origfile;
1048     char_u	*difffile;
1049     char_u	*outfile;
1050 {
1051     int		err;
1052 
1053     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1054     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1055     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1056     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1057     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1058     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1059     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1060 }
1061 # endif
1062 
1063 /*
1064  * Top level evaluation function, returning a boolean.
1065  * Sets "error" to TRUE if there was an error.
1066  * Return TRUE or FALSE.
1067  */
1068     int
1069 eval_to_bool(arg, error, nextcmd, skip)
1070     char_u	*arg;
1071     int		*error;
1072     char_u	**nextcmd;
1073     int		skip;	    /* only parse, don't execute */
1074 {
1075     typval_T	tv;
1076     int		retval = FALSE;
1077 
1078     if (skip)
1079 	++emsg_skip;
1080     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1081 	*error = TRUE;
1082     else
1083     {
1084 	*error = FALSE;
1085 	if (!skip)
1086 	{
1087 	    retval = (get_tv_number_chk(&tv, error) != 0);
1088 	    clear_tv(&tv);
1089 	}
1090     }
1091     if (skip)
1092 	--emsg_skip;
1093 
1094     return retval;
1095 }
1096 
1097 /*
1098  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1099  * only parsing to "nextcmd" is done, without reporting errors.  Return
1100  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1101  */
1102     char_u *
1103 eval_to_string_skip(arg, nextcmd, skip)
1104     char_u	*arg;
1105     char_u	**nextcmd;
1106     int		skip;	    /* only parse, don't execute */
1107 {
1108     typval_T	tv;
1109     char_u	*retval;
1110 
1111     if (skip)
1112 	++emsg_skip;
1113     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1114 	retval = NULL;
1115     else
1116     {
1117 	retval = vim_strsave(get_tv_string(&tv));
1118 	clear_tv(&tv);
1119     }
1120     if (skip)
1121 	--emsg_skip;
1122 
1123     return retval;
1124 }
1125 
1126 /*
1127  * Skip over an expression at "*pp".
1128  * Return FAIL for an error, OK otherwise.
1129  */
1130     int
1131 skip_expr(pp)
1132     char_u	**pp;
1133 {
1134     typval_T	rettv;
1135 
1136     *pp = skipwhite(*pp);
1137     return eval1(pp, &rettv, FALSE);
1138 }
1139 
1140 /*
1141  * Top level evaluation function, returning a string.
1142  * Return pointer to allocated memory, or NULL for failure.
1143  */
1144     char_u *
1145 eval_to_string(arg, nextcmd)
1146     char_u	*arg;
1147     char_u	**nextcmd;
1148 {
1149     typval_T	tv;
1150     char_u	*retval;
1151 
1152     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1153 	retval = NULL;
1154     else
1155     {
1156 	retval = vim_strsave(get_tv_string(&tv));
1157 	clear_tv(&tv);
1158     }
1159 
1160     return retval;
1161 }
1162 
1163 /*
1164  * Call eval_to_string() with "sandbox" set and not using local variables.
1165  */
1166     char_u *
1167 eval_to_string_safe(arg, nextcmd)
1168     char_u	*arg;
1169     char_u	**nextcmd;
1170 {
1171     char_u	*retval;
1172     void	*save_funccalp;
1173 
1174     save_funccalp = save_funccal();
1175     ++sandbox;
1176     retval = eval_to_string(arg, nextcmd);
1177     --sandbox;
1178     restore_funccal(save_funccalp);
1179     return retval;
1180 }
1181 
1182 /*
1183  * Top level evaluation function, returning a number.
1184  * Evaluates "expr" silently.
1185  * Returns -1 for an error.
1186  */
1187     int
1188 eval_to_number(expr)
1189     char_u	*expr;
1190 {
1191     typval_T	rettv;
1192     int		retval;
1193     char_u	*p = skipwhite(expr);
1194 
1195     ++emsg_off;
1196 
1197     if (eval1(&p, &rettv, TRUE) == FAIL)
1198 	retval = -1;
1199     else
1200     {
1201 	retval = get_tv_number_chk(&rettv, NULL);
1202 	clear_tv(&rettv);
1203     }
1204     --emsg_off;
1205 
1206     return retval;
1207 }
1208 
1209 /*
1210  * Prepare v: variable "idx" to be used.
1211  * Save the current typeval in "save_tv".
1212  * When not used yet add the variable to the v: hashtable.
1213  */
1214     static void
1215 prepare_vimvar(idx, save_tv)
1216     int		idx;
1217     typval_T	*save_tv;
1218 {
1219     *save_tv = vimvars[idx].vv_tv;
1220     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1221 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1222 }
1223 
1224 /*
1225  * Restore v: variable "idx" to typeval "save_tv".
1226  * When no longer defined, remove the variable from the v: hashtable.
1227  */
1228     static void
1229 restore_vimvar(idx, save_tv)
1230     int		idx;
1231     typval_T	*save_tv;
1232 {
1233     hashitem_T	*hi;
1234 
1235     clear_tv(&vimvars[idx].vv_tv);
1236     vimvars[idx].vv_tv = *save_tv;
1237     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1238     {
1239 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1240 	if (HASHITEM_EMPTY(hi))
1241 	    EMSG2(_(e_intern2), "restore_vimvar()");
1242 	else
1243 	    hash_remove(&vimvarht, hi);
1244     }
1245 }
1246 
1247 #if defined(FEAT_SYN_HL) || defined(PROTO)
1248 /*
1249  * Evaluate an expression to a list with suggestions.
1250  * For the "expr:" part of 'spellsuggest'.
1251  */
1252     list_T *
1253 eval_spell_expr(badword, expr)
1254     char_u	*badword;
1255     char_u	*expr;
1256 {
1257     typval_T	save_val;
1258     typval_T	rettv;
1259     list_T	*list = NULL;
1260     char_u	*p = skipwhite(expr);
1261 
1262     /* Set "v:val" to the bad word. */
1263     prepare_vimvar(VV_VAL, &save_val);
1264     vimvars[VV_VAL].vv_type = VAR_STRING;
1265     vimvars[VV_VAL].vv_str = badword;
1266     if (p_verbose == 0)
1267 	++emsg_off;
1268 
1269     if (eval1(&p, &rettv, TRUE) == OK)
1270     {
1271 	if (rettv.v_type != VAR_LIST)
1272 	    clear_tv(&rettv);
1273 	else
1274 	    list = rettv.vval.v_list;
1275     }
1276 
1277     if (p_verbose == 0)
1278 	--emsg_off;
1279     vimvars[VV_VAL].vv_str = NULL;
1280     restore_vimvar(VV_VAL, &save_val);
1281 
1282     return list;
1283 }
1284 
1285 /*
1286  * "list" is supposed to contain two items: a word and a number.  Return the
1287  * word in "pp" and the number as the return value.
1288  * Return -1 if anything isn't right.
1289  * Used to get the good word and score from the eval_spell_expr() result.
1290  */
1291     int
1292 get_spellword(list, pp)
1293     list_T	*list;
1294     char_u	**pp;
1295 {
1296     listitem_T	*li;
1297 
1298     li = list->lv_first;
1299     if (li == NULL)
1300 	return -1;
1301     *pp = get_tv_string(&li->li_tv);
1302 
1303     li = li->li_next;
1304     if (li == NULL)
1305 	return -1;
1306     return get_tv_number(&li->li_tv);
1307 }
1308 #endif
1309 
1310 /*
1311  * Top level evaluation function,
1312  */
1313     typval_T *
1314 eval_expr(arg, nextcmd)
1315     char_u	*arg;
1316     char_u	**nextcmd;
1317 {
1318     typval_T	*tv;
1319 
1320     tv = (typval_T *)alloc(sizeof(typval_T));
1321     if (!tv)
1322 	return NULL;
1323 
1324     if (eval0(arg, tv, nextcmd, TRUE) == FAIL)
1325     {
1326 	vim_free(tv);
1327 	return NULL;
1328     }
1329 
1330     return tv;
1331 }
1332 
1333 
1334 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1335 /*
1336  * Call some vimL function and return the result in "*rettv".
1337  * Uses argv[argc] for the function arguments.
1338  * Returns OK or FAIL.
1339  */
1340     static int
1341 call_vim_function(func, argc, argv, safe, rettv)
1342     char_u      *func;
1343     int		argc;
1344     char_u      **argv;
1345     int		safe;		/* use the sandbox */
1346     typval_T	*rettv;
1347 {
1348     typval_T	*argvars;
1349     long	n;
1350     int		len;
1351     int		i;
1352     int		doesrange;
1353     void	*save_funccalp = NULL;
1354     int		ret;
1355 
1356     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1357     if (argvars == NULL)
1358 	return FAIL;
1359 
1360     for (i = 0; i < argc; i++)
1361     {
1362 	/* Pass a NULL or empty argument as an empty string */
1363 	if (argv[i] == NULL || *argv[i] == NUL)
1364 	{
1365 	    argvars[i].v_type = VAR_STRING;
1366 	    argvars[i].vval.v_string = (char_u *)"";
1367 	    continue;
1368 	}
1369 
1370 	/* Recognize a number argument, the others must be strings. */
1371 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1372 	if (len != 0 && len == (int)STRLEN(argv[i]))
1373 	{
1374 	    argvars[i].v_type = VAR_NUMBER;
1375 	    argvars[i].vval.v_number = n;
1376 	}
1377 	else
1378 	{
1379 	    argvars[i].v_type = VAR_STRING;
1380 	    argvars[i].vval.v_string = argv[i];
1381 	}
1382     }
1383 
1384     if (safe)
1385     {
1386 	save_funccalp = save_funccal();
1387 	++sandbox;
1388     }
1389 
1390     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1391     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1392 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1393 		    &doesrange, TRUE, NULL);
1394     if (safe)
1395     {
1396 	--sandbox;
1397 	restore_funccal(save_funccalp);
1398     }
1399     vim_free(argvars);
1400 
1401     if (ret == FAIL)
1402 	clear_tv(rettv);
1403 
1404     return ret;
1405 }
1406 
1407 /*
1408  * Call vimL function "func" and return the result as a string.
1409  * Returns NULL when calling the function fails.
1410  * Uses argv[argc] for the function arguments.
1411  */
1412     void *
1413 call_func_retstr(func, argc, argv, safe)
1414     char_u      *func;
1415     int		argc;
1416     char_u      **argv;
1417     int		safe;		/* use the sandbox */
1418 {
1419     typval_T	rettv;
1420     char_u	*retval;
1421 
1422     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1423 	return NULL;
1424 
1425     retval = vim_strsave(get_tv_string(&rettv));
1426     clear_tv(&rettv);
1427     return retval;
1428 }
1429 
1430 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1431 /*
1432  * Call vimL function "func" and return the result as a number.
1433  * Returns -1 when calling the function fails.
1434  * Uses argv[argc] for the function arguments.
1435  */
1436     long
1437 call_func_retnr(func, argc, argv, safe)
1438     char_u      *func;
1439     int		argc;
1440     char_u      **argv;
1441     int		safe;		/* use the sandbox */
1442 {
1443     typval_T	rettv;
1444     long	retval;
1445 
1446     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1447 	return -1;
1448 
1449     retval = get_tv_number_chk(&rettv, NULL);
1450     clear_tv(&rettv);
1451     return retval;
1452 }
1453 #endif
1454 
1455 /*
1456  * Call vimL function "func" and return the result as a list
1457  * Uses argv[argc] for the function arguments.
1458  */
1459     void *
1460 call_func_retlist(func, argc, argv, safe)
1461     char_u      *func;
1462     int		argc;
1463     char_u      **argv;
1464     int		safe;		/* use the sandbox */
1465 {
1466     typval_T	rettv;
1467 
1468     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1469 	return NULL;
1470 
1471     if (rettv.v_type != VAR_LIST)
1472     {
1473 	clear_tv(&rettv);
1474 	return NULL;
1475     }
1476 
1477     return rettv.vval.v_list;
1478 }
1479 
1480 #endif
1481 
1482 /*
1483  * Save the current function call pointer, and set it to NULL.
1484  * Used when executing autocommands and for ":source".
1485  */
1486     void *
1487 save_funccal()
1488 {
1489     funccall_T *fc = current_funccal;
1490 
1491     current_funccal = NULL;
1492     return (void *)fc;
1493 }
1494 
1495     void
1496 restore_funccal(vfc)
1497     void *vfc;
1498 {
1499     funccall_T *fc = (funccall_T *)vfc;
1500 
1501     current_funccal = fc;
1502 }
1503 
1504 #if defined(FEAT_PROFILE) || defined(PROTO)
1505 /*
1506  * Prepare profiling for entering a child or something else that is not
1507  * counted for the script/function itself.
1508  * Should always be called in pair with prof_child_exit().
1509  */
1510     void
1511 prof_child_enter(tm)
1512     proftime_T *tm;	/* place to store waittime */
1513 {
1514     funccall_T *fc = current_funccal;
1515 
1516     if (fc != NULL && fc->func->uf_profiling)
1517 	profile_start(&fc->prof_child);
1518     script_prof_save(tm);
1519 }
1520 
1521 /*
1522  * Take care of time spent in a child.
1523  * Should always be called after prof_child_enter().
1524  */
1525     void
1526 prof_child_exit(tm)
1527     proftime_T *tm;	/* where waittime was stored */
1528 {
1529     funccall_T *fc = current_funccal;
1530 
1531     if (fc != NULL && fc->func->uf_profiling)
1532     {
1533 	profile_end(&fc->prof_child);
1534 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1535 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1536 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1537     }
1538     script_prof_restore(tm);
1539 }
1540 #endif
1541 
1542 
1543 #ifdef FEAT_FOLDING
1544 /*
1545  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1546  * it in "*cp".  Doesn't give error messages.
1547  */
1548     int
1549 eval_foldexpr(arg, cp)
1550     char_u	*arg;
1551     int		*cp;
1552 {
1553     typval_T	tv;
1554     int		retval;
1555     char_u	*s;
1556 
1557     ++emsg_off;
1558     ++sandbox;
1559     *cp = NUL;
1560     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1561 	retval = 0;
1562     else
1563     {
1564 	/* If the result is a number, just return the number. */
1565 	if (tv.v_type == VAR_NUMBER)
1566 	    retval = tv.vval.v_number;
1567 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1568 	    retval = 0;
1569 	else
1570 	{
1571 	    /* If the result is a string, check if there is a non-digit before
1572 	     * the number. */
1573 	    s = tv.vval.v_string;
1574 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1575 		*cp = *s++;
1576 	    retval = atol((char *)s);
1577 	}
1578 	clear_tv(&tv);
1579     }
1580     --emsg_off;
1581     --sandbox;
1582 
1583     return retval;
1584 }
1585 #endif
1586 
1587 /*
1588  * ":let"			list all variable values
1589  * ":let var1 var2"		list variable values
1590  * ":let var = expr"		assignment command.
1591  * ":let var += expr"		assignment command.
1592  * ":let var -= expr"		assignment command.
1593  * ":let var .= expr"		assignment command.
1594  * ":let [var1, var2] = expr"	unpack list.
1595  */
1596     void
1597 ex_let(eap)
1598     exarg_T	*eap;
1599 {
1600     char_u	*arg = eap->arg;
1601     char_u	*expr = NULL;
1602     typval_T	rettv;
1603     int		i;
1604     int		var_count = 0;
1605     int		semicolon = 0;
1606     char_u	op[2];
1607 
1608     expr = skip_var_list(arg, &var_count, &semicolon);
1609     if (expr == NULL)
1610 	return;
1611     expr = vim_strchr(expr, '=');
1612     if (expr == NULL)
1613     {
1614 	/*
1615 	 * ":let" without "=": list variables
1616 	 */
1617 	if (*arg == '[')
1618 	    EMSG(_(e_invarg));
1619 	else if (!ends_excmd(*arg))
1620 	    /* ":let var1 var2" */
1621 	    arg = list_arg_vars(eap, arg);
1622 	else if (!eap->skip)
1623 	{
1624 	    /* ":let" */
1625 	    list_glob_vars();
1626 	    list_buf_vars();
1627 	    list_win_vars();
1628 	    list_vim_vars();
1629 	}
1630 	eap->nextcmd = check_nextcmd(arg);
1631     }
1632     else
1633     {
1634 	op[0] = '=';
1635 	op[1] = NUL;
1636 	if (expr > arg)
1637 	{
1638 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1639 		op[0] = expr[-1];   /* +=, -= or .= */
1640 	}
1641 	expr = skipwhite(expr + 1);
1642 
1643 	if (eap->skip)
1644 	    ++emsg_skip;
1645 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1646 	if (eap->skip)
1647 	{
1648 	    if (i != FAIL)
1649 		clear_tv(&rettv);
1650 	    --emsg_skip;
1651 	}
1652 	else if (i != FAIL)
1653 	{
1654 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1655 									  op);
1656 	    clear_tv(&rettv);
1657 	}
1658     }
1659 }
1660 
1661 /*
1662  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1663  * Handles both "var" with any type and "[var, var; var]" with a list type.
1664  * When "nextchars" is not NULL it points to a string with characters that
1665  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1666  * or concatenate.
1667  * Returns OK or FAIL;
1668  */
1669     static int
1670 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1671     char_u	*arg_start;
1672     typval_T	*tv;
1673     int		copy;		/* copy values from "tv", don't move */
1674     int		semicolon;	/* from skip_var_list() */
1675     int		var_count;	/* from skip_var_list() */
1676     char_u	*nextchars;
1677 {
1678     char_u	*arg = arg_start;
1679     list_T	*l;
1680     int		i;
1681     listitem_T	*item;
1682     typval_T	ltv;
1683 
1684     if (*arg != '[')
1685     {
1686 	/*
1687 	 * ":let var = expr" or ":for var in list"
1688 	 */
1689 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1690 	    return FAIL;
1691 	return OK;
1692     }
1693 
1694     /*
1695      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1696      */
1697     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1698     {
1699 	EMSG(_(e_listreq));
1700 	return FAIL;
1701     }
1702 
1703     i = list_len(l);
1704     if (semicolon == 0 && var_count < i)
1705     {
1706 	EMSG(_("E687: Less targets than List items"));
1707 	return FAIL;
1708     }
1709     if (var_count - semicolon > i)
1710     {
1711 	EMSG(_("E688: More targets than List items"));
1712 	return FAIL;
1713     }
1714 
1715     item = l->lv_first;
1716     while (*arg != ']')
1717     {
1718 	arg = skipwhite(arg + 1);
1719 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1720 	item = item->li_next;
1721 	if (arg == NULL)
1722 	    return FAIL;
1723 
1724 	arg = skipwhite(arg);
1725 	if (*arg == ';')
1726 	{
1727 	    /* Put the rest of the list (may be empty) in the var after ';'.
1728 	     * Create a new list for this. */
1729 	    l = list_alloc();
1730 	    if (l == NULL)
1731 		return FAIL;
1732 	    while (item != NULL)
1733 	    {
1734 		list_append_tv(l, &item->li_tv);
1735 		item = item->li_next;
1736 	    }
1737 
1738 	    ltv.v_type = VAR_LIST;
1739 	    ltv.v_lock = 0;
1740 	    ltv.vval.v_list = l;
1741 	    l->lv_refcount = 1;
1742 
1743 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1744 						    (char_u *)"]", nextchars);
1745 	    clear_tv(&ltv);
1746 	    if (arg == NULL)
1747 		return FAIL;
1748 	    break;
1749 	}
1750 	else if (*arg != ',' && *arg != ']')
1751 	{
1752 	    EMSG2(_(e_intern2), "ex_let_vars()");
1753 	    return FAIL;
1754 	}
1755     }
1756 
1757     return OK;
1758 }
1759 
1760 /*
1761  * Skip over assignable variable "var" or list of variables "[var, var]".
1762  * Used for ":let varvar = expr" and ":for varvar in expr".
1763  * For "[var, var]" increment "*var_count" for each variable.
1764  * for "[var, var; var]" set "semicolon".
1765  * Return NULL for an error.
1766  */
1767     static char_u *
1768 skip_var_list(arg, var_count, semicolon)
1769     char_u	*arg;
1770     int		*var_count;
1771     int		*semicolon;
1772 {
1773     char_u	*p, *s;
1774 
1775     if (*arg == '[')
1776     {
1777 	/* "[var, var]": find the matching ']'. */
1778 	p = arg;
1779 	for (;;)
1780 	{
1781 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1782 	    s = skip_var_one(p);
1783 	    if (s == p)
1784 	    {
1785 		EMSG2(_(e_invarg2), p);
1786 		return NULL;
1787 	    }
1788 	    ++*var_count;
1789 
1790 	    p = skipwhite(s);
1791 	    if (*p == ']')
1792 		break;
1793 	    else if (*p == ';')
1794 	    {
1795 		if (*semicolon == 1)
1796 		{
1797 		    EMSG(_("Double ; in list of variables"));
1798 		    return NULL;
1799 		}
1800 		*semicolon = 1;
1801 	    }
1802 	    else if (*p != ',')
1803 	    {
1804 		EMSG2(_(e_invarg2), p);
1805 		return NULL;
1806 	    }
1807 	}
1808 	return p + 1;
1809     }
1810     else
1811 	return skip_var_one(arg);
1812 }
1813 
1814 /*
1815  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1816  * l[idx].
1817  */
1818     static char_u *
1819 skip_var_one(arg)
1820     char_u	*arg;
1821 {
1822     if (*arg == '@' && arg[1] != NUL)
1823 	return arg + 2;
1824     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1825 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1826 }
1827 
1828 /*
1829  * List variables for hashtab "ht" with prefix "prefix".
1830  * If "empty" is TRUE also list NULL strings as empty strings.
1831  */
1832     static void
1833 list_hashtable_vars(ht, prefix, empty)
1834     hashtab_T	*ht;
1835     char_u	*prefix;
1836     int		empty;
1837 {
1838     hashitem_T	*hi;
1839     dictitem_T	*di;
1840     int		todo;
1841 
1842     todo = ht->ht_used;
1843     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1844     {
1845 	if (!HASHITEM_EMPTY(hi))
1846 	{
1847 	    --todo;
1848 	    di = HI2DI(hi);
1849 	    if (empty || di->di_tv.v_type != VAR_STRING
1850 					   || di->di_tv.vval.v_string != NULL)
1851 		list_one_var(di, prefix);
1852 	}
1853     }
1854 }
1855 
1856 /*
1857  * List global variables.
1858  */
1859     static void
1860 list_glob_vars()
1861 {
1862     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1863 }
1864 
1865 /*
1866  * List buffer variables.
1867  */
1868     static void
1869 list_buf_vars()
1870 {
1871     char_u	numbuf[NUMBUFLEN];
1872 
1873     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1874 
1875     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1876     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1877 }
1878 
1879 /*
1880  * List window variables.
1881  */
1882     static void
1883 list_win_vars()
1884 {
1885     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1886 }
1887 
1888 /*
1889  * List Vim variables.
1890  */
1891     static void
1892 list_vim_vars()
1893 {
1894     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1895 }
1896 
1897 /*
1898  * List variables in "arg".
1899  */
1900     static char_u *
1901 list_arg_vars(eap, arg)
1902     exarg_T	*eap;
1903     char_u	*arg;
1904 {
1905     int		error = FALSE;
1906     int		len;
1907     char_u	*name;
1908     char_u	*name_start;
1909     char_u	*arg_subsc;
1910     char_u	*tofree;
1911     typval_T    tv;
1912 
1913     while (!ends_excmd(*arg) && !got_int)
1914     {
1915 	if (error || eap->skip)
1916 	{
1917 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1918 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1919 	    {
1920 		emsg_severe = TRUE;
1921 		EMSG(_(e_trailing));
1922 		break;
1923 	    }
1924 	}
1925 	else
1926 	{
1927 	    /* get_name_len() takes care of expanding curly braces */
1928 	    name_start = name = arg;
1929 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1930 	    if (len <= 0)
1931 	    {
1932 		/* This is mainly to keep test 49 working: when expanding
1933 		 * curly braces fails overrule the exception error message. */
1934 		if (len < 0 && !aborting())
1935 		{
1936 		    emsg_severe = TRUE;
1937 		    EMSG2(_(e_invarg2), arg);
1938 		    break;
1939 		}
1940 		error = TRUE;
1941 	    }
1942 	    else
1943 	    {
1944 		if (tofree != NULL)
1945 		    name = tofree;
1946 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1947 		    error = TRUE;
1948 		else
1949 		{
1950 		    /* handle d.key, l[idx], f(expr) */
1951 		    arg_subsc = arg;
1952 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
1953 			error = TRUE;
1954 		    else
1955 		    {
1956 			if (arg == arg_subsc && len == 2 && name[1] == ':')
1957 			{
1958 			    switch (*name)
1959 			    {
1960 				case 'g': list_glob_vars(); break;
1961 				case 'b': list_buf_vars(); break;
1962 				case 'w': list_win_vars(); break;
1963 				case 'v': list_vim_vars(); break;
1964 				default:
1965 					  EMSG2(_("E738: Can't list variables for %s"), name);
1966 			    }
1967 			}
1968 			else
1969 			{
1970 			    char_u	numbuf[NUMBUFLEN];
1971 			    char_u	*tf;
1972 			    int		c;
1973 			    char_u	*s;
1974 
1975 			    s = echo_string(&tv, &tf, numbuf);
1976 			    c = *arg;
1977 			    *arg = NUL;
1978 			    list_one_var_a((char_u *)"",
1979 				    arg == arg_subsc ? name : name_start,
1980 				    tv.v_type, s == NULL ? (char_u *)"" : s);
1981 			    *arg = c;
1982 			    vim_free(tf);
1983 			}
1984 			clear_tv(&tv);
1985 		    }
1986 		}
1987 	    }
1988 
1989 	    vim_free(tofree);
1990 	}
1991 
1992 	arg = skipwhite(arg);
1993     }
1994 
1995     return arg;
1996 }
1997 
1998 /*
1999  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2000  * Returns a pointer to the char just after the var name.
2001  * Returns NULL if there is an error.
2002  */
2003     static char_u *
2004 ex_let_one(arg, tv, copy, endchars, op)
2005     char_u	*arg;		/* points to variable name */
2006     typval_T	*tv;		/* value to assign to variable */
2007     int		copy;		/* copy value from "tv" */
2008     char_u	*endchars;	/* valid chars after variable name  or NULL */
2009     char_u	*op;		/* "+", "-", "."  or NULL*/
2010 {
2011     int		c1;
2012     char_u	*name;
2013     char_u	*p;
2014     char_u	*arg_end = NULL;
2015     int		len;
2016     int		opt_flags;
2017     char_u	*tofree = NULL;
2018 
2019     /*
2020      * ":let $VAR = expr": Set environment variable.
2021      */
2022     if (*arg == '$')
2023     {
2024 	/* Find the end of the name. */
2025 	++arg;
2026 	name = arg;
2027 	len = get_env_len(&arg);
2028 	if (len == 0)
2029 	    EMSG2(_(e_invarg2), name - 1);
2030 	else
2031 	{
2032 	    if (op != NULL && (*op == '+' || *op == '-'))
2033 		EMSG2(_(e_letwrong), op);
2034 	    else if (endchars != NULL
2035 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2036 		EMSG(_(e_letunexp));
2037 	    else
2038 	    {
2039 		c1 = name[len];
2040 		name[len] = NUL;
2041 		p = get_tv_string_chk(tv);
2042 		if (p != NULL && op != NULL && *op == '.')
2043 		{
2044 		    int	    mustfree = FALSE;
2045 		    char_u  *s = vim_getenv(name, &mustfree);
2046 
2047 		    if (s != NULL)
2048 		    {
2049 			p = tofree = concat_str(s, p);
2050 			if (mustfree)
2051 			    vim_free(s);
2052 		    }
2053 		}
2054 		if (p != NULL)
2055 		{
2056 		    vim_setenv(name, p);
2057 		    if (STRICMP(name, "HOME") == 0)
2058 			init_homedir();
2059 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2060 			didset_vim = FALSE;
2061 		    else if (didset_vimruntime
2062 					&& STRICMP(name, "VIMRUNTIME") == 0)
2063 			didset_vimruntime = FALSE;
2064 		    arg_end = arg;
2065 		}
2066 		name[len] = c1;
2067 		vim_free(tofree);
2068 	    }
2069 	}
2070     }
2071 
2072     /*
2073      * ":let &option = expr": Set option value.
2074      * ":let &l:option = expr": Set local option value.
2075      * ":let &g:option = expr": Set global option value.
2076      */
2077     else if (*arg == '&')
2078     {
2079 	/* Find the end of the name. */
2080 	p = find_option_end(&arg, &opt_flags);
2081 	if (p == NULL || (endchars != NULL
2082 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2083 	    EMSG(_(e_letunexp));
2084 	else
2085 	{
2086 	    long	n;
2087 	    int		opt_type;
2088 	    long	numval;
2089 	    char_u	*stringval = NULL;
2090 	    char_u	*s;
2091 
2092 	    c1 = *p;
2093 	    *p = NUL;
2094 
2095 	    n = get_tv_number(tv);
2096 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2097 	    if (s != NULL && op != NULL && *op != '=')
2098 	    {
2099 		opt_type = get_option_value(arg, &numval,
2100 						       &stringval, opt_flags);
2101 		if ((opt_type == 1 && *op == '.')
2102 			|| (opt_type == 0 && *op != '.'))
2103 		    EMSG2(_(e_letwrong), op);
2104 		else
2105 		{
2106 		    if (opt_type == 1)  /* number */
2107 		    {
2108 			if (*op == '+')
2109 			    n = numval + n;
2110 			else
2111 			    n = numval - n;
2112 		    }
2113 		    else if (opt_type == 0 && stringval != NULL) /* string */
2114 		    {
2115 			s = concat_str(stringval, s);
2116 			vim_free(stringval);
2117 			stringval = s;
2118 		    }
2119 		}
2120 	    }
2121 	    if (s != NULL)
2122 	    {
2123 		set_option_value(arg, n, s, opt_flags);
2124 		arg_end = p;
2125 	    }
2126 	    *p = c1;
2127 	    vim_free(stringval);
2128 	}
2129     }
2130 
2131     /*
2132      * ":let @r = expr": Set register contents.
2133      */
2134     else if (*arg == '@')
2135     {
2136 	++arg;
2137 	if (op != NULL && (*op == '+' || *op == '-'))
2138 	    EMSG2(_(e_letwrong), op);
2139 	else if (endchars != NULL
2140 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2141 	    EMSG(_(e_letunexp));
2142 	else
2143 	{
2144 	    char_u	*tofree = NULL;
2145 	    char_u	*s;
2146 
2147 	    p = get_tv_string_chk(tv);
2148 	    if (p != NULL && op != NULL && *op == '.')
2149 	    {
2150 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2151 		if (s != NULL)
2152 		{
2153 		    p = tofree = concat_str(s, p);
2154 		    vim_free(s);
2155 		}
2156 	    }
2157 	    if (p != NULL)
2158 	    {
2159 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2160 		arg_end = arg + 1;
2161 	    }
2162 	    vim_free(tofree);
2163 	}
2164     }
2165 
2166     /*
2167      * ":let var = expr": Set internal variable.
2168      * ":let {expr} = expr": Idem, name made with curly braces
2169      */
2170     else if (eval_isnamec1(*arg) || *arg == '{')
2171     {
2172 	lval_T	lv;
2173 
2174 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2175 	if (p != NULL && lv.ll_name != NULL)
2176 	{
2177 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2178 		EMSG(_(e_letunexp));
2179 	    else
2180 	    {
2181 		set_var_lval(&lv, p, tv, copy, op);
2182 		arg_end = p;
2183 	    }
2184 	}
2185 	clear_lval(&lv);
2186     }
2187 
2188     else
2189 	EMSG2(_(e_invarg2), arg);
2190 
2191     return arg_end;
2192 }
2193 
2194 /*
2195  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2196  */
2197     static int
2198 check_changedtick(arg)
2199     char_u	*arg;
2200 {
2201     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2202     {
2203 	EMSG2(_(e_readonlyvar), arg);
2204 	return TRUE;
2205     }
2206     return FALSE;
2207 }
2208 
2209 /*
2210  * Get an lval: variable, Dict item or List item that can be assigned a value
2211  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2212  * "name.key", "name.key[expr]" etc.
2213  * Indexing only works if "name" is an existing List or Dictionary.
2214  * "name" points to the start of the name.
2215  * If "rettv" is not NULL it points to the value to be assigned.
2216  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2217  * wrong; must end in space or cmd separator.
2218  *
2219  * Returns a pointer to just after the name, including indexes.
2220  * When an evaluation error occurs "lp->ll_name" is NULL;
2221  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2222  */
2223     static char_u *
2224 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2225     char_u	*name;
2226     typval_T	*rettv;
2227     lval_T	*lp;
2228     int		unlet;
2229     int		skip;
2230     int		quiet;	    /* don't give error messages */
2231     int		fne_flags;  /* flags for find_name_end() */
2232 {
2233     char_u	*p;
2234     char_u	*expr_start, *expr_end;
2235     int		cc;
2236     dictitem_T	*v;
2237     typval_T	var1;
2238     typval_T	var2;
2239     int		empty1 = FALSE;
2240     listitem_T	*ni;
2241     char_u	*key = NULL;
2242     int		len;
2243     hashtab_T	*ht;
2244 
2245     /* Clear everything in "lp". */
2246     vim_memset(lp, 0, sizeof(lval_T));
2247 
2248     if (skip)
2249     {
2250 	/* When skipping just find the end of the name. */
2251 	lp->ll_name = name;
2252 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2253     }
2254 
2255     /* Find the end of the name. */
2256     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2257     if (expr_start != NULL)
2258     {
2259 	/* Don't expand the name when we already know there is an error. */
2260 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2261 						    && *p != '[' && *p != '.')
2262 	{
2263 	    EMSG(_(e_trailing));
2264 	    return NULL;
2265 	}
2266 
2267 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2268 	if (lp->ll_exp_name == NULL)
2269 	{
2270 	    /* Report an invalid expression in braces, unless the
2271 	     * expression evaluation has been cancelled due to an
2272 	     * aborting error, an interrupt, or an exception. */
2273 	    if (!aborting() && !quiet)
2274 	    {
2275 		emsg_severe = TRUE;
2276 		EMSG2(_(e_invarg2), name);
2277 		return NULL;
2278 	    }
2279 	}
2280 	lp->ll_name = lp->ll_exp_name;
2281     }
2282     else
2283 	lp->ll_name = name;
2284 
2285     /* Without [idx] or .key we are done. */
2286     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2287 	return p;
2288 
2289     cc = *p;
2290     *p = NUL;
2291     v = find_var(lp->ll_name, &ht);
2292     if (v == NULL && !quiet)
2293 	EMSG2(_(e_undefvar), lp->ll_name);
2294     *p = cc;
2295     if (v == NULL)
2296 	return NULL;
2297 
2298     /*
2299      * Loop until no more [idx] or .key is following.
2300      */
2301     lp->ll_tv = &v->di_tv;
2302     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2303     {
2304 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2305 		&& !(lp->ll_tv->v_type == VAR_DICT
2306 					   && lp->ll_tv->vval.v_dict != NULL))
2307 	{
2308 	    if (!quiet)
2309 		EMSG(_("E689: Can only index a List or Dictionary"));
2310 	    return NULL;
2311 	}
2312 	if (lp->ll_range)
2313 	{
2314 	    if (!quiet)
2315 		EMSG(_("E708: [:] must come last"));
2316 	    return NULL;
2317 	}
2318 
2319 	len = -1;
2320 	if (*p == '.')
2321 	{
2322 	    key = p + 1;
2323 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2324 		;
2325 	    if (len == 0)
2326 	    {
2327 		if (!quiet)
2328 		    EMSG(_(e_emptykey));
2329 		return NULL;
2330 	    }
2331 	    p = key + len;
2332 	}
2333 	else
2334 	{
2335 	    /* Get the index [expr] or the first index [expr: ]. */
2336 	    p = skipwhite(p + 1);
2337 	    if (*p == ':')
2338 		empty1 = TRUE;
2339 	    else
2340 	    {
2341 		empty1 = FALSE;
2342 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2343 		    return NULL;
2344 		if (get_tv_string_chk(&var1) == NULL)
2345 		{
2346 		    /* not a number or string */
2347 		    clear_tv(&var1);
2348 		    return NULL;
2349 		}
2350 	    }
2351 
2352 	    /* Optionally get the second index [ :expr]. */
2353 	    if (*p == ':')
2354 	    {
2355 		if (lp->ll_tv->v_type == VAR_DICT)
2356 		{
2357 		    if (!quiet)
2358 			EMSG(_(e_dictrange));
2359 		    if (!empty1)
2360 			clear_tv(&var1);
2361 		    return NULL;
2362 		}
2363 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2364 					       || rettv->vval.v_list == NULL))
2365 		{
2366 		    if (!quiet)
2367 			EMSG(_("E709: [:] requires a List value"));
2368 		    if (!empty1)
2369 			clear_tv(&var1);
2370 		    return NULL;
2371 		}
2372 		p = skipwhite(p + 1);
2373 		if (*p == ']')
2374 		    lp->ll_empty2 = TRUE;
2375 		else
2376 		{
2377 		    lp->ll_empty2 = FALSE;
2378 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2379 		    {
2380 			if (!empty1)
2381 			    clear_tv(&var1);
2382 			return NULL;
2383 		    }
2384 		    if (get_tv_string_chk(&var2) == NULL)
2385 		    {
2386 			/* not a number or string */
2387 			if (!empty1)
2388 			    clear_tv(&var1);
2389 			clear_tv(&var2);
2390 			return NULL;
2391 		    }
2392 		}
2393 		lp->ll_range = TRUE;
2394 	    }
2395 	    else
2396 		lp->ll_range = FALSE;
2397 
2398 	    if (*p != ']')
2399 	    {
2400 		if (!quiet)
2401 		    EMSG(_(e_missbrac));
2402 		if (!empty1)
2403 		    clear_tv(&var1);
2404 		if (lp->ll_range && !lp->ll_empty2)
2405 		    clear_tv(&var2);
2406 		return NULL;
2407 	    }
2408 
2409 	    /* Skip to past ']'. */
2410 	    ++p;
2411 	}
2412 
2413 	if (lp->ll_tv->v_type == VAR_DICT)
2414 	{
2415 	    if (len == -1)
2416 	    {
2417 		/* "[key]": get key from "var1" */
2418 		key = get_tv_string(&var1);	/* is number or string */
2419 		if (*key == NUL)
2420 		{
2421 		    if (!quiet)
2422 			EMSG(_(e_emptykey));
2423 		    clear_tv(&var1);
2424 		    return NULL;
2425 		}
2426 	    }
2427 	    lp->ll_list = NULL;
2428 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2429 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2430 	    if (lp->ll_di == NULL)
2431 	    {
2432 		/* Key does not exist in dict: may need to add it. */
2433 		if (*p == '[' || *p == '.' || unlet)
2434 		{
2435 		    if (!quiet)
2436 			EMSG2(_(e_dictkey), key);
2437 		    if (len == -1)
2438 			clear_tv(&var1);
2439 		    return NULL;
2440 		}
2441 		if (len == -1)
2442 		    lp->ll_newkey = vim_strsave(key);
2443 		else
2444 		    lp->ll_newkey = vim_strnsave(key, len);
2445 		if (len == -1)
2446 		    clear_tv(&var1);
2447 		if (lp->ll_newkey == NULL)
2448 		    p = NULL;
2449 		break;
2450 	    }
2451 	    if (len == -1)
2452 		clear_tv(&var1);
2453 	    lp->ll_tv = &lp->ll_di->di_tv;
2454 	}
2455 	else
2456 	{
2457 	    /*
2458 	     * Get the number and item for the only or first index of the List.
2459 	     */
2460 	    if (empty1)
2461 		lp->ll_n1 = 0;
2462 	    else
2463 	    {
2464 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2465 		clear_tv(&var1);
2466 	    }
2467 	    lp->ll_dict = NULL;
2468 	    lp->ll_list = lp->ll_tv->vval.v_list;
2469 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2470 	    if (lp->ll_li == NULL)
2471 	    {
2472 		if (!quiet)
2473 		    EMSGN(_(e_listidx), lp->ll_n1);
2474 		if (lp->ll_range && !lp->ll_empty2)
2475 		    clear_tv(&var2);
2476 		return NULL;
2477 	    }
2478 
2479 	    /*
2480 	     * May need to find the item or absolute index for the second
2481 	     * index of a range.
2482 	     * When no index given: "lp->ll_empty2" is TRUE.
2483 	     * Otherwise "lp->ll_n2" is set to the second index.
2484 	     */
2485 	    if (lp->ll_range && !lp->ll_empty2)
2486 	    {
2487 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2488 		clear_tv(&var2);
2489 		if (lp->ll_n2 < 0)
2490 		{
2491 		    ni = list_find(lp->ll_list, lp->ll_n2);
2492 		    if (ni == NULL)
2493 		    {
2494 			if (!quiet)
2495 			    EMSGN(_(e_listidx), lp->ll_n2);
2496 			return NULL;
2497 		    }
2498 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2499 		}
2500 
2501 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2502 		if (lp->ll_n1 < 0)
2503 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2504 		if (lp->ll_n2 < lp->ll_n1)
2505 		{
2506 		    if (!quiet)
2507 			EMSGN(_(e_listidx), lp->ll_n2);
2508 		    return NULL;
2509 		}
2510 	    }
2511 
2512 	    lp->ll_tv = &lp->ll_li->li_tv;
2513 	}
2514     }
2515 
2516     return p;
2517 }
2518 
2519 /*
2520  * Clear lval "lp" that was filled by get_lval().
2521  */
2522     static void
2523 clear_lval(lp)
2524     lval_T	*lp;
2525 {
2526     vim_free(lp->ll_exp_name);
2527     vim_free(lp->ll_newkey);
2528 }
2529 
2530 /*
2531  * Set a variable that was parsed by get_lval() to "rettv".
2532  * "endp" points to just after the parsed name.
2533  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2534  */
2535     static void
2536 set_var_lval(lp, endp, rettv, copy, op)
2537     lval_T	*lp;
2538     char_u	*endp;
2539     typval_T	*rettv;
2540     int		copy;
2541     char_u	*op;
2542 {
2543     int		cc;
2544     listitem_T	*ni;
2545     listitem_T	*ri;
2546     dictitem_T	*di;
2547 
2548     if (lp->ll_tv == NULL)
2549     {
2550 	if (!check_changedtick(lp->ll_name))
2551 	{
2552 	    cc = *endp;
2553 	    *endp = NUL;
2554 	    if (op != NULL && *op != '=')
2555 	    {
2556 		typval_T tv;
2557 
2558 		/* handle +=, -= and .= */
2559 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2560 							     &tv, TRUE) == OK)
2561 		{
2562 		    if (tv_op(&tv, rettv, op) == OK)
2563 			set_var(lp->ll_name, &tv, FALSE);
2564 		    clear_tv(&tv);
2565 		}
2566 	    }
2567 	    else
2568 		set_var(lp->ll_name, rettv, copy);
2569 	    *endp = cc;
2570 	}
2571     }
2572     else if (tv_check_lock(lp->ll_newkey == NULL
2573 		? lp->ll_tv->v_lock
2574 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2575 	;
2576     else if (lp->ll_range)
2577     {
2578 	/*
2579 	 * Assign the List values to the list items.
2580 	 */
2581 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2582 	{
2583 	    if (op != NULL && *op != '=')
2584 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2585 	    else
2586 	    {
2587 		clear_tv(&lp->ll_li->li_tv);
2588 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2589 	    }
2590 	    ri = ri->li_next;
2591 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2592 		break;
2593 	    if (lp->ll_li->li_next == NULL)
2594 	    {
2595 		/* Need to add an empty item. */
2596 		ni = listitem_alloc();
2597 		if (ni == NULL)
2598 		{
2599 		    ri = NULL;
2600 		    break;
2601 		}
2602 		ni->li_tv.v_type = VAR_NUMBER;
2603 		ni->li_tv.v_lock = 0;
2604 		ni->li_tv.vval.v_number = 0;
2605 		list_append(lp->ll_list, ni);
2606 	    }
2607 	    lp->ll_li = lp->ll_li->li_next;
2608 	    ++lp->ll_n1;
2609 	}
2610 	if (ri != NULL)
2611 	    EMSG(_("E710: List value has more items than target"));
2612 	else if (lp->ll_empty2
2613 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2614 		: lp->ll_n1 != lp->ll_n2)
2615 	    EMSG(_("E711: List value has not enough items"));
2616     }
2617     else
2618     {
2619 	/*
2620 	 * Assign to a List or Dictionary item.
2621 	 */
2622 	if (lp->ll_newkey != NULL)
2623 	{
2624 	    if (op != NULL && *op != '=')
2625 	    {
2626 		EMSG2(_(e_letwrong), op);
2627 		return;
2628 	    }
2629 
2630 	    /* Need to add an item to the Dictionary. */
2631 	    di = dictitem_alloc(lp->ll_newkey);
2632 	    if (di == NULL)
2633 		return;
2634 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2635 	    {
2636 		vim_free(di);
2637 		return;
2638 	    }
2639 	    lp->ll_tv = &di->di_tv;
2640 	}
2641 	else if (op != NULL && *op != '=')
2642 	{
2643 	    tv_op(lp->ll_tv, rettv, op);
2644 	    return;
2645 	}
2646 	else
2647 	    clear_tv(lp->ll_tv);
2648 
2649 	/*
2650 	 * Assign the value to the variable or list item.
2651 	 */
2652 	if (copy)
2653 	    copy_tv(rettv, lp->ll_tv);
2654 	else
2655 	{
2656 	    *lp->ll_tv = *rettv;
2657 	    lp->ll_tv->v_lock = 0;
2658 	    init_tv(rettv);
2659 	}
2660     }
2661 }
2662 
2663 /*
2664  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2665  * Returns OK or FAIL.
2666  */
2667     static int
2668 tv_op(tv1, tv2, op)
2669     typval_T *tv1;
2670     typval_T *tv2;
2671     char_u  *op;
2672 {
2673     long	n;
2674     char_u	numbuf[NUMBUFLEN];
2675     char_u	*s;
2676 
2677     /* Can't do anything with a Funcref or a Dict on the right. */
2678     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2679     {
2680 	switch (tv1->v_type)
2681 	{
2682 	    case VAR_DICT:
2683 	    case VAR_FUNC:
2684 		break;
2685 
2686 	    case VAR_LIST:
2687 		if (*op != '+' || tv2->v_type != VAR_LIST)
2688 		    break;
2689 		/* List += List */
2690 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2691 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2692 		return OK;
2693 
2694 	    case VAR_NUMBER:
2695 	    case VAR_STRING:
2696 		if (tv2->v_type == VAR_LIST)
2697 		    break;
2698 		if (*op == '+' || *op == '-')
2699 		{
2700 		    /* nr += nr  or  nr -= nr*/
2701 		    n = get_tv_number(tv1);
2702 		    if (*op == '+')
2703 			n += get_tv_number(tv2);
2704 		    else
2705 			n -= get_tv_number(tv2);
2706 		    clear_tv(tv1);
2707 		    tv1->v_type = VAR_NUMBER;
2708 		    tv1->vval.v_number = n;
2709 		}
2710 		else
2711 		{
2712 		    /* str .= str */
2713 		    s = get_tv_string(tv1);
2714 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2715 		    clear_tv(tv1);
2716 		    tv1->v_type = VAR_STRING;
2717 		    tv1->vval.v_string = s;
2718 		}
2719 		return OK;
2720 	}
2721     }
2722 
2723     EMSG2(_(e_letwrong), op);
2724     return FAIL;
2725 }
2726 
2727 /*
2728  * Add a watcher to a list.
2729  */
2730     static void
2731 list_add_watch(l, lw)
2732     list_T	*l;
2733     listwatch_T	*lw;
2734 {
2735     lw->lw_next = l->lv_watch;
2736     l->lv_watch = lw;
2737 }
2738 
2739 /*
2740  * Remove a watcher from a list.
2741  * No warning when it isn't found...
2742  */
2743     static void
2744 list_rem_watch(l, lwrem)
2745     list_T	*l;
2746     listwatch_T	*lwrem;
2747 {
2748     listwatch_T	*lw, **lwp;
2749 
2750     lwp = &l->lv_watch;
2751     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2752     {
2753 	if (lw == lwrem)
2754 	{
2755 	    *lwp = lw->lw_next;
2756 	    break;
2757 	}
2758 	lwp = &lw->lw_next;
2759     }
2760 }
2761 
2762 /*
2763  * Just before removing an item from a list: advance watchers to the next
2764  * item.
2765  */
2766     static void
2767 list_fix_watch(l, item)
2768     list_T	*l;
2769     listitem_T	*item;
2770 {
2771     listwatch_T	*lw;
2772 
2773     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2774 	if (lw->lw_item == item)
2775 	    lw->lw_item = item->li_next;
2776 }
2777 
2778 /*
2779  * Evaluate the expression used in a ":for var in expr" command.
2780  * "arg" points to "var".
2781  * Set "*errp" to TRUE for an error, FALSE otherwise;
2782  * Return a pointer that holds the info.  Null when there is an error.
2783  */
2784     void *
2785 eval_for_line(arg, errp, nextcmdp, skip)
2786     char_u	*arg;
2787     int		*errp;
2788     char_u	**nextcmdp;
2789     int		skip;
2790 {
2791     forinfo_T	*fi;
2792     char_u	*expr;
2793     typval_T	tv;
2794     list_T	*l;
2795 
2796     *errp = TRUE;	/* default: there is an error */
2797 
2798     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2799     if (fi == NULL)
2800 	return NULL;
2801 
2802     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2803     if (expr == NULL)
2804 	return fi;
2805 
2806     expr = skipwhite(expr);
2807     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2808     {
2809 	EMSG(_("E690: Missing \"in\" after :for"));
2810 	return fi;
2811     }
2812 
2813     if (skip)
2814 	++emsg_skip;
2815     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2816     {
2817 	*errp = FALSE;
2818 	if (!skip)
2819 	{
2820 	    l = tv.vval.v_list;
2821 	    if (tv.v_type != VAR_LIST || l == NULL)
2822 	    {
2823 		EMSG(_(e_listreq));
2824 		clear_tv(&tv);
2825 	    }
2826 	    else
2827 	    {
2828 		fi->fi_list = l;
2829 		list_add_watch(l, &fi->fi_lw);
2830 		fi->fi_lw.lw_item = l->lv_first;
2831 	    }
2832 	}
2833     }
2834     if (skip)
2835 	--emsg_skip;
2836 
2837     return fi;
2838 }
2839 
2840 /*
2841  * Use the first item in a ":for" list.  Advance to the next.
2842  * Assign the values to the variable (list).  "arg" points to the first one.
2843  * Return TRUE when a valid item was found, FALSE when at end of list or
2844  * something wrong.
2845  */
2846     int
2847 next_for_item(fi_void, arg)
2848     void	*fi_void;
2849     char_u	*arg;
2850 {
2851     forinfo_T    *fi = (forinfo_T *)fi_void;
2852     int		result;
2853     listitem_T	*item;
2854 
2855     item = fi->fi_lw.lw_item;
2856     if (item == NULL)
2857 	result = FALSE;
2858     else
2859     {
2860 	fi->fi_lw.lw_item = item->li_next;
2861 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2862 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2863     }
2864     return result;
2865 }
2866 
2867 /*
2868  * Free the structure used to store info used by ":for".
2869  */
2870     void
2871 free_for_info(fi_void)
2872     void *fi_void;
2873 {
2874     forinfo_T    *fi = (forinfo_T *)fi_void;
2875 
2876     if (fi != NULL && fi->fi_list != NULL)
2877     {
2878 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2879 	list_unref(fi->fi_list);
2880     }
2881     vim_free(fi);
2882 }
2883 
2884 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2885 
2886     void
2887 set_context_for_expression(xp, arg, cmdidx)
2888     expand_T	*xp;
2889     char_u	*arg;
2890     cmdidx_T	cmdidx;
2891 {
2892     int		got_eq = FALSE;
2893     int		c;
2894     char_u	*p;
2895 
2896     if (cmdidx == CMD_let)
2897     {
2898 	xp->xp_context = EXPAND_USER_VARS;
2899 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2900 	{
2901 	    /* ":let var1 var2 ...": find last space. */
2902 	    for (p = arg + STRLEN(arg); p >= arg; )
2903 	    {
2904 		xp->xp_pattern = p;
2905 		mb_ptr_back(arg, p);
2906 		if (vim_iswhite(*p))
2907 		    break;
2908 	    }
2909 	    return;
2910 	}
2911     }
2912     else
2913 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2914 							  : EXPAND_EXPRESSION;
2915     while ((xp->xp_pattern = vim_strpbrk(arg,
2916 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2917     {
2918 	c = *xp->xp_pattern;
2919 	if (c == '&')
2920 	{
2921 	    c = xp->xp_pattern[1];
2922 	    if (c == '&')
2923 	    {
2924 		++xp->xp_pattern;
2925 		xp->xp_context = cmdidx != CMD_let || got_eq
2926 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2927 	    }
2928 	    else if (c != ' ')
2929 	    {
2930 		xp->xp_context = EXPAND_SETTINGS;
2931 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2932 		    xp->xp_pattern += 2;
2933 
2934 	    }
2935 	}
2936 	else if (c == '$')
2937 	{
2938 	    /* environment variable */
2939 	    xp->xp_context = EXPAND_ENV_VARS;
2940 	}
2941 	else if (c == '=')
2942 	{
2943 	    got_eq = TRUE;
2944 	    xp->xp_context = EXPAND_EXPRESSION;
2945 	}
2946 	else if (c == '<'
2947 		&& xp->xp_context == EXPAND_FUNCTIONS
2948 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2949 	{
2950 	    /* Function name can start with "<SNR>" */
2951 	    break;
2952 	}
2953 	else if (cmdidx != CMD_let || got_eq)
2954 	{
2955 	    if (c == '"')	    /* string */
2956 	    {
2957 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
2958 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
2959 			++xp->xp_pattern;
2960 		xp->xp_context = EXPAND_NOTHING;
2961 	    }
2962 	    else if (c == '\'')	    /* literal string */
2963 	    {
2964 		/* Trick: '' is like stopping and starting a literal string. */
2965 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
2966 		    /* skip */ ;
2967 		xp->xp_context = EXPAND_NOTHING;
2968 	    }
2969 	    else if (c == '|')
2970 	    {
2971 		if (xp->xp_pattern[1] == '|')
2972 		{
2973 		    ++xp->xp_pattern;
2974 		    xp->xp_context = EXPAND_EXPRESSION;
2975 		}
2976 		else
2977 		    xp->xp_context = EXPAND_COMMANDS;
2978 	    }
2979 	    else
2980 		xp->xp_context = EXPAND_EXPRESSION;
2981 	}
2982 	else
2983 	    /* Doesn't look like something valid, expand as an expression
2984 	     * anyway. */
2985 	    xp->xp_context = EXPAND_EXPRESSION;
2986 	arg = xp->xp_pattern;
2987 	if (*arg != NUL)
2988 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
2989 		/* skip */ ;
2990     }
2991     xp->xp_pattern = arg;
2992 }
2993 
2994 #endif /* FEAT_CMDL_COMPL */
2995 
2996 /*
2997  * ":1,25call func(arg1, arg2)"	function call.
2998  */
2999     void
3000 ex_call(eap)
3001     exarg_T	*eap;
3002 {
3003     char_u	*arg = eap->arg;
3004     char_u	*startarg;
3005     char_u	*name;
3006     char_u	*tofree;
3007     int		len;
3008     typval_T	rettv;
3009     linenr_T	lnum;
3010     int		doesrange;
3011     int		failed = FALSE;
3012     funcdict_T	fudi;
3013 
3014     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3015     vim_free(fudi.fd_newkey);
3016     if (tofree == NULL)
3017 	return;
3018 
3019     /* Increase refcount on dictionary, it could get deleted when evaluating
3020      * the arguments. */
3021     if (fudi.fd_dict != NULL)
3022 	++fudi.fd_dict->dv_refcount;
3023 
3024     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3025     len = STRLEN(tofree);
3026     name = deref_func_name(tofree, &len);
3027 
3028     /* Skip white space to allow ":call func ()".  Not good, but required for
3029      * backward compatibility. */
3030     startarg = skipwhite(arg);
3031     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3032 
3033     if (*startarg != '(')
3034     {
3035 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3036 	goto end;
3037     }
3038 
3039     /*
3040      * When skipping, evaluate the function once, to find the end of the
3041      * arguments.
3042      * When the function takes a range, this is discovered after the first
3043      * call, and the loop is broken.
3044      */
3045     if (eap->skip)
3046     {
3047 	++emsg_skip;
3048 	lnum = eap->line2;	/* do it once, also with an invalid range */
3049     }
3050     else
3051 	lnum = eap->line1;
3052     for ( ; lnum <= eap->line2; ++lnum)
3053     {
3054 	if (!eap->skip && eap->addr_count > 0)
3055 	{
3056 	    curwin->w_cursor.lnum = lnum;
3057 	    curwin->w_cursor.col = 0;
3058 	}
3059 	arg = startarg;
3060 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3061 		    eap->line1, eap->line2, &doesrange,
3062 					    !eap->skip, fudi.fd_dict) == FAIL)
3063 	{
3064 	    failed = TRUE;
3065 	    break;
3066 	}
3067 	clear_tv(&rettv);
3068 	if (doesrange || eap->skip)
3069 	    break;
3070 	/* Stop when immediately aborting on error, or when an interrupt
3071 	 * occurred or an exception was thrown but not caught.
3072 	 * get_func_tv() returned OK, so that the check for trailing
3073 	 * characters below is executed. */
3074 	if (aborting())
3075 	    break;
3076     }
3077     if (eap->skip)
3078 	--emsg_skip;
3079 
3080     if (!failed)
3081     {
3082 	/* Check for trailing illegal characters and a following command. */
3083 	if (!ends_excmd(*arg))
3084 	{
3085 	    emsg_severe = TRUE;
3086 	    EMSG(_(e_trailing));
3087 	}
3088 	else
3089 	    eap->nextcmd = check_nextcmd(arg);
3090     }
3091 
3092 end:
3093     dict_unref(fudi.fd_dict);
3094     vim_free(tofree);
3095 }
3096 
3097 /*
3098  * ":unlet[!] var1 ... " command.
3099  */
3100     void
3101 ex_unlet(eap)
3102     exarg_T	*eap;
3103 {
3104     ex_unletlock(eap, eap->arg, 0);
3105 }
3106 
3107 /*
3108  * ":lockvar" and ":unlockvar" commands
3109  */
3110     void
3111 ex_lockvar(eap)
3112     exarg_T	*eap;
3113 {
3114     char_u	*arg = eap->arg;
3115     int		deep = 2;
3116 
3117     if (eap->forceit)
3118 	deep = -1;
3119     else if (vim_isdigit(*arg))
3120     {
3121 	deep = getdigits(&arg);
3122 	arg = skipwhite(arg);
3123     }
3124 
3125     ex_unletlock(eap, arg, deep);
3126 }
3127 
3128 /*
3129  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3130  */
3131     static void
3132 ex_unletlock(eap, argstart, deep)
3133     exarg_T	*eap;
3134     char_u	*argstart;
3135     int		deep;
3136 {
3137     char_u	*arg = argstart;
3138     char_u	*name_end;
3139     int		error = FALSE;
3140     lval_T	lv;
3141 
3142     do
3143     {
3144 	/* Parse the name and find the end. */
3145 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3146 							     FNE_CHECK_START);
3147 	if (lv.ll_name == NULL)
3148 	    error = TRUE;	    /* error but continue parsing */
3149 	if (name_end == NULL || (!vim_iswhite(*name_end)
3150 						   && !ends_excmd(*name_end)))
3151 	{
3152 	    if (name_end != NULL)
3153 	    {
3154 		emsg_severe = TRUE;
3155 		EMSG(_(e_trailing));
3156 	    }
3157 	    if (!(eap->skip || error))
3158 		clear_lval(&lv);
3159 	    break;
3160 	}
3161 
3162 	if (!error && !eap->skip)
3163 	{
3164 	    if (eap->cmdidx == CMD_unlet)
3165 	    {
3166 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3167 		    error = TRUE;
3168 	    }
3169 	    else
3170 	    {
3171 		if (do_lock_var(&lv, name_end, deep,
3172 					  eap->cmdidx == CMD_lockvar) == FAIL)
3173 		    error = TRUE;
3174 	    }
3175 	}
3176 
3177 	if (!eap->skip)
3178 	    clear_lval(&lv);
3179 
3180 	arg = skipwhite(name_end);
3181     } while (!ends_excmd(*arg));
3182 
3183     eap->nextcmd = check_nextcmd(arg);
3184 }
3185 
3186     static int
3187 do_unlet_var(lp, name_end, forceit)
3188     lval_T	*lp;
3189     char_u	*name_end;
3190     int		forceit;
3191 {
3192     int		ret = OK;
3193     int		cc;
3194 
3195     if (lp->ll_tv == NULL)
3196     {
3197 	cc = *name_end;
3198 	*name_end = NUL;
3199 
3200 	/* Normal name or expanded name. */
3201 	if (check_changedtick(lp->ll_name))
3202 	    ret = FAIL;
3203 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3204 	    ret = FAIL;
3205 	*name_end = cc;
3206     }
3207     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3208 	return FAIL;
3209     else if (lp->ll_range)
3210     {
3211 	listitem_T    *li;
3212 
3213 	/* Delete a range of List items. */
3214 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3215 	{
3216 	    li = lp->ll_li->li_next;
3217 	    listitem_remove(lp->ll_list, lp->ll_li);
3218 	    lp->ll_li = li;
3219 	    ++lp->ll_n1;
3220 	}
3221     }
3222     else
3223     {
3224 	if (lp->ll_list != NULL)
3225 	    /* unlet a List item. */
3226 	    listitem_remove(lp->ll_list, lp->ll_li);
3227 	else
3228 	    /* unlet a Dictionary item. */
3229 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3230     }
3231 
3232     return ret;
3233 }
3234 
3235 /*
3236  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3237  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3238  */
3239     int
3240 do_unlet(name, forceit)
3241     char_u	*name;
3242     int		forceit;
3243 {
3244     hashtab_T	*ht;
3245     hashitem_T	*hi;
3246     char_u	*varname;
3247 
3248     ht = find_var_ht(name, &varname);
3249     if (ht != NULL && *varname != NUL)
3250     {
3251 	hi = hash_find(ht, varname);
3252 	if (!HASHITEM_EMPTY(hi))
3253 	{
3254 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3255 		return FAIL;
3256 	    delete_var(ht, hi);
3257 	    return OK;
3258 	}
3259     }
3260     if (forceit)
3261 	return OK;
3262     EMSG2(_("E108: No such variable: \"%s\""), name);
3263     return FAIL;
3264 }
3265 
3266 /*
3267  * Lock or unlock variable indicated by "lp".
3268  * "deep" is the levels to go (-1 for unlimited);
3269  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3270  */
3271     static int
3272 do_lock_var(lp, name_end, deep, lock)
3273     lval_T	*lp;
3274     char_u	*name_end;
3275     int		deep;
3276     int		lock;
3277 {
3278     int		ret = OK;
3279     int		cc;
3280     dictitem_T	*di;
3281 
3282     if (deep == 0)	/* nothing to do */
3283 	return OK;
3284 
3285     if (lp->ll_tv == NULL)
3286     {
3287 	cc = *name_end;
3288 	*name_end = NUL;
3289 
3290 	/* Normal name or expanded name. */
3291 	if (check_changedtick(lp->ll_name))
3292 	    ret = FAIL;
3293 	else
3294 	{
3295 	    di = find_var(lp->ll_name, NULL);
3296 	    if (di == NULL)
3297 		ret = FAIL;
3298 	    else
3299 	    {
3300 		if (lock)
3301 		    di->di_flags |= DI_FLAGS_LOCK;
3302 		else
3303 		    di->di_flags &= ~DI_FLAGS_LOCK;
3304 		item_lock(&di->di_tv, deep, lock);
3305 	    }
3306 	}
3307 	*name_end = cc;
3308     }
3309     else if (lp->ll_range)
3310     {
3311 	listitem_T    *li = lp->ll_li;
3312 
3313 	/* (un)lock a range of List items. */
3314 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3315 	{
3316 	    item_lock(&li->li_tv, deep, lock);
3317 	    li = li->li_next;
3318 	    ++lp->ll_n1;
3319 	}
3320     }
3321     else if (lp->ll_list != NULL)
3322 	/* (un)lock a List item. */
3323 	item_lock(&lp->ll_li->li_tv, deep, lock);
3324     else
3325 	/* un(lock) a Dictionary item. */
3326 	item_lock(&lp->ll_di->di_tv, deep, lock);
3327 
3328     return ret;
3329 }
3330 
3331 /*
3332  * Lock or unlock an item.  "deep" is nr of levels to go.
3333  */
3334     static void
3335 item_lock(tv, deep, lock)
3336     typval_T	*tv;
3337     int		deep;
3338     int		lock;
3339 {
3340     static int	recurse = 0;
3341     list_T	*l;
3342     listitem_T	*li;
3343     dict_T	*d;
3344     hashitem_T	*hi;
3345     int		todo;
3346 
3347     if (recurse >= DICT_MAXNEST)
3348     {
3349 	EMSG(_("E743: variable nested too deep for (un)lock"));
3350 	return;
3351     }
3352     if (deep == 0)
3353 	return;
3354     ++recurse;
3355 
3356     /* lock/unlock the item itself */
3357     if (lock)
3358 	tv->v_lock |= VAR_LOCKED;
3359     else
3360 	tv->v_lock &= ~VAR_LOCKED;
3361 
3362     switch (tv->v_type)
3363     {
3364 	case VAR_LIST:
3365 	    if ((l = tv->vval.v_list) != NULL)
3366 	    {
3367 		if (lock)
3368 		    l->lv_lock |= VAR_LOCKED;
3369 		else
3370 		    l->lv_lock &= ~VAR_LOCKED;
3371 		if (deep < 0 || deep > 1)
3372 		    /* recursive: lock/unlock the items the List contains */
3373 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3374 			item_lock(&li->li_tv, deep - 1, lock);
3375 	    }
3376 	    break;
3377 	case VAR_DICT:
3378 	    if ((d = tv->vval.v_dict) != NULL)
3379 	    {
3380 		if (lock)
3381 		    d->dv_lock |= VAR_LOCKED;
3382 		else
3383 		    d->dv_lock &= ~VAR_LOCKED;
3384 		if (deep < 0 || deep > 1)
3385 		{
3386 		    /* recursive: lock/unlock the items the List contains */
3387 		    todo = d->dv_hashtab.ht_used;
3388 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3389 		    {
3390 			if (!HASHITEM_EMPTY(hi))
3391 			{
3392 			    --todo;
3393 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3394 			}
3395 		    }
3396 		}
3397 	    }
3398     }
3399     --recurse;
3400 }
3401 
3402 /*
3403  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3404  * it refers to a List or Dictionary that is locked.
3405  */
3406     static int
3407 tv_islocked(tv)
3408     typval_T	*tv;
3409 {
3410     return (tv->v_lock & VAR_LOCKED)
3411 	|| (tv->v_type == VAR_LIST
3412 		&& tv->vval.v_list != NULL
3413 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3414 	|| (tv->v_type == VAR_DICT
3415 		&& tv->vval.v_dict != NULL
3416 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3417 }
3418 
3419 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3420 /*
3421  * Delete all "menutrans_" variables.
3422  */
3423     void
3424 del_menutrans_vars()
3425 {
3426     hashitem_T	*hi;
3427     int		todo;
3428 
3429     hash_lock(&globvarht);
3430     todo = globvarht.ht_used;
3431     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3432     {
3433 	if (!HASHITEM_EMPTY(hi))
3434 	{
3435 	    --todo;
3436 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3437 		delete_var(&globvarht, hi);
3438 	}
3439     }
3440     hash_unlock(&globvarht);
3441 }
3442 #endif
3443 
3444 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3445 
3446 /*
3447  * Local string buffer for the next two functions to store a variable name
3448  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3449  * get_user_var_name().
3450  */
3451 
3452 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3453 
3454 static char_u	*varnamebuf = NULL;
3455 static int	varnamebuflen = 0;
3456 
3457 /*
3458  * Function to concatenate a prefix and a variable name.
3459  */
3460     static char_u *
3461 cat_prefix_varname(prefix, name)
3462     int		prefix;
3463     char_u	*name;
3464 {
3465     int		len;
3466 
3467     len = (int)STRLEN(name) + 3;
3468     if (len > varnamebuflen)
3469     {
3470 	vim_free(varnamebuf);
3471 	len += 10;			/* some additional space */
3472 	varnamebuf = alloc(len);
3473 	if (varnamebuf == NULL)
3474 	{
3475 	    varnamebuflen = 0;
3476 	    return NULL;
3477 	}
3478 	varnamebuflen = len;
3479     }
3480     *varnamebuf = prefix;
3481     varnamebuf[1] = ':';
3482     STRCPY(varnamebuf + 2, name);
3483     return varnamebuf;
3484 }
3485 
3486 /*
3487  * Function given to ExpandGeneric() to obtain the list of user defined
3488  * (global/buffer/window/built-in) variable names.
3489  */
3490 /*ARGSUSED*/
3491     char_u *
3492 get_user_var_name(xp, idx)
3493     expand_T	*xp;
3494     int		idx;
3495 {
3496     static long_u	gdone;
3497     static long_u	bdone;
3498     static long_u	wdone;
3499     static int		vidx;
3500     static hashitem_T	*hi;
3501     hashtab_T		*ht;
3502 
3503     if (idx == 0)
3504 	gdone = bdone = wdone = vidx = 0;
3505 
3506     /* Global variables */
3507     if (gdone < globvarht.ht_used)
3508     {
3509 	if (gdone++ == 0)
3510 	    hi = globvarht.ht_array;
3511 	else
3512 	    ++hi;
3513 	while (HASHITEM_EMPTY(hi))
3514 	    ++hi;
3515 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3516 	    return cat_prefix_varname('g', hi->hi_key);
3517 	return hi->hi_key;
3518     }
3519 
3520     /* b: variables */
3521     ht = &curbuf->b_vars.dv_hashtab;
3522     if (bdone < ht->ht_used)
3523     {
3524 	if (bdone++ == 0)
3525 	    hi = ht->ht_array;
3526 	else
3527 	    ++hi;
3528 	while (HASHITEM_EMPTY(hi))
3529 	    ++hi;
3530 	return cat_prefix_varname('b', hi->hi_key);
3531     }
3532     if (bdone == ht->ht_used)
3533     {
3534 	++bdone;
3535 	return (char_u *)"b:changedtick";
3536     }
3537 
3538     /* w: variables */
3539     ht = &curwin->w_vars.dv_hashtab;
3540     if (wdone < ht->ht_used)
3541     {
3542 	if (wdone++ == 0)
3543 	    hi = ht->ht_array;
3544 	else
3545 	    ++hi;
3546 	while (HASHITEM_EMPTY(hi))
3547 	    ++hi;
3548 	return cat_prefix_varname('w', hi->hi_key);
3549     }
3550 
3551     /* v: variables */
3552     if (vidx < VV_LEN)
3553 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3554 
3555     vim_free(varnamebuf);
3556     varnamebuf = NULL;
3557     varnamebuflen = 0;
3558     return NULL;
3559 }
3560 
3561 #endif /* FEAT_CMDL_COMPL */
3562 
3563 /*
3564  * types for expressions.
3565  */
3566 typedef enum
3567 {
3568     TYPE_UNKNOWN = 0
3569     , TYPE_EQUAL	/* == */
3570     , TYPE_NEQUAL	/* != */
3571     , TYPE_GREATER	/* >  */
3572     , TYPE_GEQUAL	/* >= */
3573     , TYPE_SMALLER	/* <  */
3574     , TYPE_SEQUAL	/* <= */
3575     , TYPE_MATCH	/* =~ */
3576     , TYPE_NOMATCH	/* !~ */
3577 } exptype_T;
3578 
3579 /*
3580  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3581  * executed.  The function may return OK, but the rettv will be of type
3582  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3583  */
3584 
3585 /*
3586  * Handle zero level expression.
3587  * This calls eval1() and handles error message and nextcmd.
3588  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3589  * Return OK or FAIL.
3590  */
3591     static int
3592 eval0(arg, rettv, nextcmd, evaluate)
3593     char_u	*arg;
3594     typval_T	*rettv;
3595     char_u	**nextcmd;
3596     int		evaluate;
3597 {
3598     int		ret;
3599     char_u	*p;
3600 
3601     p = skipwhite(arg);
3602     ret = eval1(&p, rettv, evaluate);
3603     if (ret == FAIL || !ends_excmd(*p))
3604     {
3605 	if (ret != FAIL)
3606 	    clear_tv(rettv);
3607 	/*
3608 	 * Report the invalid expression unless the expression evaluation has
3609 	 * been cancelled due to an aborting error, an interrupt, or an
3610 	 * exception.
3611 	 */
3612 	if (!aborting())
3613 	    EMSG2(_(e_invexpr2), arg);
3614 	ret = FAIL;
3615     }
3616     if (nextcmd != NULL)
3617 	*nextcmd = check_nextcmd(p);
3618 
3619     return ret;
3620 }
3621 
3622 /*
3623  * Handle top level expression:
3624  *	expr1 ? expr0 : expr0
3625  *
3626  * "arg" must point to the first non-white of the expression.
3627  * "arg" is advanced to the next non-white after the recognized expression.
3628  *
3629  * Return OK or FAIL.
3630  */
3631     static int
3632 eval1(arg, rettv, evaluate)
3633     char_u	**arg;
3634     typval_T	*rettv;
3635     int		evaluate;
3636 {
3637     int		result;
3638     typval_T	var2;
3639 
3640     /*
3641      * Get the first variable.
3642      */
3643     if (eval2(arg, rettv, evaluate) == FAIL)
3644 	return FAIL;
3645 
3646     if ((*arg)[0] == '?')
3647     {
3648 	result = FALSE;
3649 	if (evaluate)
3650 	{
3651 	    int		error = FALSE;
3652 
3653 	    if (get_tv_number_chk(rettv, &error) != 0)
3654 		result = TRUE;
3655 	    clear_tv(rettv);
3656 	    if (error)
3657 		return FAIL;
3658 	}
3659 
3660 	/*
3661 	 * Get the second variable.
3662 	 */
3663 	*arg = skipwhite(*arg + 1);
3664 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3665 	    return FAIL;
3666 
3667 	/*
3668 	 * Check for the ":".
3669 	 */
3670 	if ((*arg)[0] != ':')
3671 	{
3672 	    EMSG(_("E109: Missing ':' after '?'"));
3673 	    if (evaluate && result)
3674 		clear_tv(rettv);
3675 	    return FAIL;
3676 	}
3677 
3678 	/*
3679 	 * Get the third variable.
3680 	 */
3681 	*arg = skipwhite(*arg + 1);
3682 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3683 	{
3684 	    if (evaluate && result)
3685 		clear_tv(rettv);
3686 	    return FAIL;
3687 	}
3688 	if (evaluate && !result)
3689 	    *rettv = var2;
3690     }
3691 
3692     return OK;
3693 }
3694 
3695 /*
3696  * Handle first level expression:
3697  *	expr2 || expr2 || expr2	    logical OR
3698  *
3699  * "arg" must point to the first non-white of the expression.
3700  * "arg" is advanced to the next non-white after the recognized expression.
3701  *
3702  * Return OK or FAIL.
3703  */
3704     static int
3705 eval2(arg, rettv, evaluate)
3706     char_u	**arg;
3707     typval_T	*rettv;
3708     int		evaluate;
3709 {
3710     typval_T	var2;
3711     long	result;
3712     int		first;
3713     int		error = FALSE;
3714 
3715     /*
3716      * Get the first variable.
3717      */
3718     if (eval3(arg, rettv, evaluate) == FAIL)
3719 	return FAIL;
3720 
3721     /*
3722      * Repeat until there is no following "||".
3723      */
3724     first = TRUE;
3725     result = FALSE;
3726     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3727     {
3728 	if (evaluate && first)
3729 	{
3730 	    if (get_tv_number_chk(rettv, &error) != 0)
3731 		result = TRUE;
3732 	    clear_tv(rettv);
3733 	    if (error)
3734 		return FAIL;
3735 	    first = FALSE;
3736 	}
3737 
3738 	/*
3739 	 * Get the second variable.
3740 	 */
3741 	*arg = skipwhite(*arg + 2);
3742 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3743 	    return FAIL;
3744 
3745 	/*
3746 	 * Compute the result.
3747 	 */
3748 	if (evaluate && !result)
3749 	{
3750 	    if (get_tv_number_chk(&var2, &error) != 0)
3751 		result = TRUE;
3752 	    clear_tv(&var2);
3753 	    if (error)
3754 		return FAIL;
3755 	}
3756 	if (evaluate)
3757 	{
3758 	    rettv->v_type = VAR_NUMBER;
3759 	    rettv->vval.v_number = result;
3760 	}
3761     }
3762 
3763     return OK;
3764 }
3765 
3766 /*
3767  * Handle second level expression:
3768  *	expr3 && expr3 && expr3	    logical AND
3769  *
3770  * "arg" must point to the first non-white of the expression.
3771  * "arg" is advanced to the next non-white after the recognized expression.
3772  *
3773  * Return OK or FAIL.
3774  */
3775     static int
3776 eval3(arg, rettv, evaluate)
3777     char_u	**arg;
3778     typval_T	*rettv;
3779     int		evaluate;
3780 {
3781     typval_T	var2;
3782     long	result;
3783     int		first;
3784     int		error = FALSE;
3785 
3786     /*
3787      * Get the first variable.
3788      */
3789     if (eval4(arg, rettv, evaluate) == FAIL)
3790 	return FAIL;
3791 
3792     /*
3793      * Repeat until there is no following "&&".
3794      */
3795     first = TRUE;
3796     result = TRUE;
3797     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3798     {
3799 	if (evaluate && first)
3800 	{
3801 	    if (get_tv_number_chk(rettv, &error) == 0)
3802 		result = FALSE;
3803 	    clear_tv(rettv);
3804 	    if (error)
3805 		return FAIL;
3806 	    first = FALSE;
3807 	}
3808 
3809 	/*
3810 	 * Get the second variable.
3811 	 */
3812 	*arg = skipwhite(*arg + 2);
3813 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3814 	    return FAIL;
3815 
3816 	/*
3817 	 * Compute the result.
3818 	 */
3819 	if (evaluate && result)
3820 	{
3821 	    if (get_tv_number_chk(&var2, &error) == 0)
3822 		result = FALSE;
3823 	    clear_tv(&var2);
3824 	    if (error)
3825 		return FAIL;
3826 	}
3827 	if (evaluate)
3828 	{
3829 	    rettv->v_type = VAR_NUMBER;
3830 	    rettv->vval.v_number = result;
3831 	}
3832     }
3833 
3834     return OK;
3835 }
3836 
3837 /*
3838  * Handle third level expression:
3839  *	var1 == var2
3840  *	var1 =~ var2
3841  *	var1 != var2
3842  *	var1 !~ var2
3843  *	var1 > var2
3844  *	var1 >= var2
3845  *	var1 < var2
3846  *	var1 <= var2
3847  *	var1 is var2
3848  *	var1 isnot var2
3849  *
3850  * "arg" must point to the first non-white of the expression.
3851  * "arg" is advanced to the next non-white after the recognized expression.
3852  *
3853  * Return OK or FAIL.
3854  */
3855     static int
3856 eval4(arg, rettv, evaluate)
3857     char_u	**arg;
3858     typval_T	*rettv;
3859     int		evaluate;
3860 {
3861     typval_T	var2;
3862     char_u	*p;
3863     int		i;
3864     exptype_T	type = TYPE_UNKNOWN;
3865     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3866     int		len = 2;
3867     long	n1, n2;
3868     char_u	*s1, *s2;
3869     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3870     regmatch_T	regmatch;
3871     int		ic;
3872     char_u	*save_cpo;
3873 
3874     /*
3875      * Get the first variable.
3876      */
3877     if (eval5(arg, rettv, evaluate) == FAIL)
3878 	return FAIL;
3879 
3880     p = *arg;
3881     switch (p[0])
3882     {
3883 	case '=':   if (p[1] == '=')
3884 			type = TYPE_EQUAL;
3885 		    else if (p[1] == '~')
3886 			type = TYPE_MATCH;
3887 		    break;
3888 	case '!':   if (p[1] == '=')
3889 			type = TYPE_NEQUAL;
3890 		    else if (p[1] == '~')
3891 			type = TYPE_NOMATCH;
3892 		    break;
3893 	case '>':   if (p[1] != '=')
3894 		    {
3895 			type = TYPE_GREATER;
3896 			len = 1;
3897 		    }
3898 		    else
3899 			type = TYPE_GEQUAL;
3900 		    break;
3901 	case '<':   if (p[1] != '=')
3902 		    {
3903 			type = TYPE_SMALLER;
3904 			len = 1;
3905 		    }
3906 		    else
3907 			type = TYPE_SEQUAL;
3908 		    break;
3909 	case 'i':   if (p[1] == 's')
3910 		    {
3911 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3912 			    len = 5;
3913 			if (!vim_isIDc(p[len]))
3914 			{
3915 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3916 			    type_is = TRUE;
3917 			}
3918 		    }
3919 		    break;
3920     }
3921 
3922     /*
3923      * If there is a comparitive operator, use it.
3924      */
3925     if (type != TYPE_UNKNOWN)
3926     {
3927 	/* extra question mark appended: ignore case */
3928 	if (p[len] == '?')
3929 	{
3930 	    ic = TRUE;
3931 	    ++len;
3932 	}
3933 	/* extra '#' appended: match case */
3934 	else if (p[len] == '#')
3935 	{
3936 	    ic = FALSE;
3937 	    ++len;
3938 	}
3939 	/* nothing appened: use 'ignorecase' */
3940 	else
3941 	    ic = p_ic;
3942 
3943 	/*
3944 	 * Get the second variable.
3945 	 */
3946 	*arg = skipwhite(p + len);
3947 	if (eval5(arg, &var2, evaluate) == FAIL)
3948 	{
3949 	    clear_tv(rettv);
3950 	    return FAIL;
3951 	}
3952 
3953 	if (evaluate)
3954 	{
3955 	    if (type_is && rettv->v_type != var2.v_type)
3956 	    {
3957 		/* For "is" a different type always means FALSE, for "notis"
3958 		 * it means TRUE. */
3959 		n1 = (type == TYPE_NEQUAL);
3960 	    }
3961 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
3962 	    {
3963 		if (type_is)
3964 		{
3965 		    n1 = (rettv->v_type == var2.v_type
3966 				   && rettv->vval.v_list == var2.vval.v_list);
3967 		    if (type == TYPE_NEQUAL)
3968 			n1 = !n1;
3969 		}
3970 		else if (rettv->v_type != var2.v_type
3971 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3972 		{
3973 		    if (rettv->v_type != var2.v_type)
3974 			EMSG(_("E691: Can only compare List with List"));
3975 		    else
3976 			EMSG(_("E692: Invalid operation for Lists"));
3977 		    clear_tv(rettv);
3978 		    clear_tv(&var2);
3979 		    return FAIL;
3980 		}
3981 		else
3982 		{
3983 		    /* Compare two Lists for being equal or unequal. */
3984 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
3985 		    if (type == TYPE_NEQUAL)
3986 			n1 = !n1;
3987 		}
3988 	    }
3989 
3990 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
3991 	    {
3992 		if (type_is)
3993 		{
3994 		    n1 = (rettv->v_type == var2.v_type
3995 				   && rettv->vval.v_dict == var2.vval.v_dict);
3996 		    if (type == TYPE_NEQUAL)
3997 			n1 = !n1;
3998 		}
3999 		else if (rettv->v_type != var2.v_type
4000 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4001 		{
4002 		    if (rettv->v_type != var2.v_type)
4003 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4004 		    else
4005 			EMSG(_("E736: Invalid operation for Dictionary"));
4006 		    clear_tv(rettv);
4007 		    clear_tv(&var2);
4008 		    return FAIL;
4009 		}
4010 		else
4011 		{
4012 		    /* Compare two Dictionaries for being equal or unequal. */
4013 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4014 		    if (type == TYPE_NEQUAL)
4015 			n1 = !n1;
4016 		}
4017 	    }
4018 
4019 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4020 	    {
4021 		if (rettv->v_type != var2.v_type
4022 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4023 		{
4024 		    if (rettv->v_type != var2.v_type)
4025 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4026 		    else
4027 			EMSG(_("E694: Invalid operation for Funcrefs"));
4028 		    clear_tv(rettv);
4029 		    clear_tv(&var2);
4030 		    return FAIL;
4031 		}
4032 		else
4033 		{
4034 		    /* Compare two Funcrefs for being equal or unequal. */
4035 		    if (rettv->vval.v_string == NULL
4036 						|| var2.vval.v_string == NULL)
4037 			n1 = FALSE;
4038 		    else
4039 			n1 = STRCMP(rettv->vval.v_string,
4040 						     var2.vval.v_string) == 0;
4041 		    if (type == TYPE_NEQUAL)
4042 			n1 = !n1;
4043 		}
4044 	    }
4045 
4046 	    /*
4047 	     * If one of the two variables is a number, compare as a number.
4048 	     * When using "=~" or "!~", always compare as string.
4049 	     */
4050 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4051 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4052 	    {
4053 		n1 = get_tv_number(rettv);
4054 		n2 = get_tv_number(&var2);
4055 		switch (type)
4056 		{
4057 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4058 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4059 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4060 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4061 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4062 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4063 		    case TYPE_UNKNOWN:
4064 		    case TYPE_MATCH:
4065 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4066 		}
4067 	    }
4068 	    else
4069 	    {
4070 		s1 = get_tv_string_buf(rettv, buf1);
4071 		s2 = get_tv_string_buf(&var2, buf2);
4072 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4073 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4074 		else
4075 		    i = 0;
4076 		n1 = FALSE;
4077 		switch (type)
4078 		{
4079 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4080 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4081 		    case TYPE_GREATER:  n1 = (i > 0); break;
4082 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4083 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4084 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4085 
4086 		    case TYPE_MATCH:
4087 		    case TYPE_NOMATCH:
4088 			    /* avoid 'l' flag in 'cpoptions' */
4089 			    save_cpo = p_cpo;
4090 			    p_cpo = (char_u *)"";
4091 			    regmatch.regprog = vim_regcomp(s2,
4092 							RE_MAGIC + RE_STRING);
4093 			    regmatch.rm_ic = ic;
4094 			    if (regmatch.regprog != NULL)
4095 			    {
4096 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4097 				vim_free(regmatch.regprog);
4098 				if (type == TYPE_NOMATCH)
4099 				    n1 = !n1;
4100 			    }
4101 			    p_cpo = save_cpo;
4102 			    break;
4103 
4104 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4105 		}
4106 	    }
4107 	    clear_tv(rettv);
4108 	    clear_tv(&var2);
4109 	    rettv->v_type = VAR_NUMBER;
4110 	    rettv->vval.v_number = n1;
4111 	}
4112     }
4113 
4114     return OK;
4115 }
4116 
4117 /*
4118  * Handle fourth level expression:
4119  *	+	number addition
4120  *	-	number subtraction
4121  *	.	string concatenation
4122  *
4123  * "arg" must point to the first non-white of the expression.
4124  * "arg" is advanced to the next non-white after the recognized expression.
4125  *
4126  * Return OK or FAIL.
4127  */
4128     static int
4129 eval5(arg, rettv, evaluate)
4130     char_u	**arg;
4131     typval_T	*rettv;
4132     int		evaluate;
4133 {
4134     typval_T	var2;
4135     typval_T	var3;
4136     int		op;
4137     long	n1, n2;
4138     char_u	*s1, *s2;
4139     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4140     char_u	*p;
4141 
4142     /*
4143      * Get the first variable.
4144      */
4145     if (eval6(arg, rettv, evaluate) == FAIL)
4146 	return FAIL;
4147 
4148     /*
4149      * Repeat computing, until no '+', '-' or '.' is following.
4150      */
4151     for (;;)
4152     {
4153 	op = **arg;
4154 	if (op != '+' && op != '-' && op != '.')
4155 	    break;
4156 
4157 	if (op != '+' || rettv->v_type != VAR_LIST)
4158 	{
4159 	    /* For "list + ...", an illegal use of the first operand as
4160 	     * a number cannot be determined before evaluating the 2nd
4161 	     * operand: if this is also a list, all is ok.
4162 	     * For "something . ...", "something - ..." or "non-list + ...",
4163 	     * we know that the first operand needs to be a string or number
4164 	     * without evaluating the 2nd operand.  So check before to avoid
4165 	     * side effects after an error. */
4166 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4167 	    {
4168 		clear_tv(rettv);
4169 		return FAIL;
4170 	    }
4171 	}
4172 
4173 	/*
4174 	 * Get the second variable.
4175 	 */
4176 	*arg = skipwhite(*arg + 1);
4177 	if (eval6(arg, &var2, evaluate) == FAIL)
4178 	{
4179 	    clear_tv(rettv);
4180 	    return FAIL;
4181 	}
4182 
4183 	if (evaluate)
4184 	{
4185 	    /*
4186 	     * Compute the result.
4187 	     */
4188 	    if (op == '.')
4189 	    {
4190 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4191 		s2 = get_tv_string_buf_chk(&var2, buf2);
4192 		if (s2 == NULL)		/* type error ? */
4193 		{
4194 		    clear_tv(rettv);
4195 		    clear_tv(&var2);
4196 		    return FAIL;
4197 		}
4198 		p = concat_str(s1, s2);
4199 		clear_tv(rettv);
4200 		rettv->v_type = VAR_STRING;
4201 		rettv->vval.v_string = p;
4202 	    }
4203 	    else if (op == '+' && rettv->v_type == VAR_LIST
4204 						   && var2.v_type == VAR_LIST)
4205 	    {
4206 		/* concatenate Lists */
4207 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4208 							       &var3) == FAIL)
4209 		{
4210 		    clear_tv(rettv);
4211 		    clear_tv(&var2);
4212 		    return FAIL;
4213 		}
4214 		clear_tv(rettv);
4215 		*rettv = var3;
4216 	    }
4217 	    else
4218 	    {
4219 		int	    error = FALSE;
4220 
4221 		n1 = get_tv_number_chk(rettv, &error);
4222 		if (error)
4223 		{
4224 		    /* This can only happen for "list + non-list".
4225 		     * For "non-list + ..." or "something - ...", we returned
4226 		     * before evaluating the 2nd operand. */
4227 		    clear_tv(rettv);
4228 		    return FAIL;
4229 		}
4230 		n2 = get_tv_number_chk(&var2, &error);
4231 		if (error)
4232 		{
4233 		    clear_tv(rettv);
4234 		    clear_tv(&var2);
4235 		    return FAIL;
4236 		}
4237 		clear_tv(rettv);
4238 		if (op == '+')
4239 		    n1 = n1 + n2;
4240 		else
4241 		    n1 = n1 - n2;
4242 		rettv->v_type = VAR_NUMBER;
4243 		rettv->vval.v_number = n1;
4244 	    }
4245 	    clear_tv(&var2);
4246 	}
4247     }
4248     return OK;
4249 }
4250 
4251 /*
4252  * Handle fifth level expression:
4253  *	*	number multiplication
4254  *	/	number division
4255  *	%	number modulo
4256  *
4257  * "arg" must point to the first non-white of the expression.
4258  * "arg" is advanced to the next non-white after the recognized expression.
4259  *
4260  * Return OK or FAIL.
4261  */
4262     static int
4263 eval6(arg, rettv, evaluate)
4264     char_u	**arg;
4265     typval_T	*rettv;
4266     int		evaluate;
4267 {
4268     typval_T	var2;
4269     int		op;
4270     long	n1, n2;
4271     int		error = FALSE;
4272 
4273     /*
4274      * Get the first variable.
4275      */
4276     if (eval7(arg, rettv, evaluate) == FAIL)
4277 	return FAIL;
4278 
4279     /*
4280      * Repeat computing, until no '*', '/' or '%' is following.
4281      */
4282     for (;;)
4283     {
4284 	op = **arg;
4285 	if (op != '*' && op != '/' && op != '%')
4286 	    break;
4287 
4288 	if (evaluate)
4289 	{
4290 	    n1 = get_tv_number_chk(rettv, &error);
4291 	    clear_tv(rettv);
4292 	    if (error)
4293 		return FAIL;
4294 	}
4295 	else
4296 	    n1 = 0;
4297 
4298 	/*
4299 	 * Get the second variable.
4300 	 */
4301 	*arg = skipwhite(*arg + 1);
4302 	if (eval7(arg, &var2, evaluate) == FAIL)
4303 	    return FAIL;
4304 
4305 	if (evaluate)
4306 	{
4307 	    n2 = get_tv_number_chk(&var2, &error);
4308 	    clear_tv(&var2);
4309 	    if (error)
4310 		return FAIL;
4311 
4312 	    /*
4313 	     * Compute the result.
4314 	     */
4315 	    if (op == '*')
4316 		n1 = n1 * n2;
4317 	    else if (op == '/')
4318 	    {
4319 		if (n2 == 0)	/* give an error message? */
4320 		    n1 = 0x7fffffffL;
4321 		else
4322 		    n1 = n1 / n2;
4323 	    }
4324 	    else
4325 	    {
4326 		if (n2 == 0)	/* give an error message? */
4327 		    n1 = 0;
4328 		else
4329 		    n1 = n1 % n2;
4330 	    }
4331 	    rettv->v_type = VAR_NUMBER;
4332 	    rettv->vval.v_number = n1;
4333 	}
4334     }
4335 
4336     return OK;
4337 }
4338 
4339 /*
4340  * Handle sixth level expression:
4341  *  number		number constant
4342  *  "string"		string contstant
4343  *  'string'		literal string contstant
4344  *  &option-name	option value
4345  *  @r			register contents
4346  *  identifier		variable value
4347  *  function()		function call
4348  *  $VAR		environment variable
4349  *  (expression)	nested expression
4350  *  [expr, expr]	List
4351  *  {key: val, key: val}  Dictionary
4352  *
4353  *  Also handle:
4354  *  ! in front		logical NOT
4355  *  - in front		unary minus
4356  *  + in front		unary plus (ignored)
4357  *  trailing []		subscript in String or List
4358  *  trailing .name	entry in Dictionary
4359  *
4360  * "arg" must point to the first non-white of the expression.
4361  * "arg" is advanced to the next non-white after the recognized expression.
4362  *
4363  * Return OK or FAIL.
4364  */
4365     static int
4366 eval7(arg, rettv, evaluate)
4367     char_u	**arg;
4368     typval_T	*rettv;
4369     int		evaluate;
4370 {
4371     long	n;
4372     int		len;
4373     char_u	*s;
4374     int		val;
4375     char_u	*start_leader, *end_leader;
4376     int		ret = OK;
4377     char_u	*alias;
4378 
4379     /*
4380      * Initialise variable so that clear_tv() can't mistake this for a
4381      * string and free a string that isn't there.
4382      */
4383     rettv->v_type = VAR_UNKNOWN;
4384 
4385     /*
4386      * Skip '!' and '-' characters.  They are handled later.
4387      */
4388     start_leader = *arg;
4389     while (**arg == '!' || **arg == '-' || **arg == '+')
4390 	*arg = skipwhite(*arg + 1);
4391     end_leader = *arg;
4392 
4393     switch (**arg)
4394     {
4395     /*
4396      * Number constant.
4397      */
4398     case '0':
4399     case '1':
4400     case '2':
4401     case '3':
4402     case '4':
4403     case '5':
4404     case '6':
4405     case '7':
4406     case '8':
4407     case '9':
4408 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4409 		*arg += len;
4410 		if (evaluate)
4411 		{
4412 		    rettv->v_type = VAR_NUMBER;
4413 		    rettv->vval.v_number = n;
4414 		}
4415 		break;
4416 
4417     /*
4418      * String constant: "string".
4419      */
4420     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4421 		break;
4422 
4423     /*
4424      * Literal string constant: 'str''ing'.
4425      */
4426     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4427 		break;
4428 
4429     /*
4430      * List: [expr, expr]
4431      */
4432     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4433 		break;
4434 
4435     /*
4436      * Dictionary: {key: val, key: val}
4437      */
4438     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4439 		break;
4440 
4441     /*
4442      * Option value: &name
4443      */
4444     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4445 		break;
4446 
4447     /*
4448      * Environment variable: $VAR.
4449      */
4450     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4451 		break;
4452 
4453     /*
4454      * Register contents: @r.
4455      */
4456     case '@':	++*arg;
4457 		if (evaluate)
4458 		{
4459 		    rettv->v_type = VAR_STRING;
4460 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4461 		}
4462 		if (**arg != NUL)
4463 		    ++*arg;
4464 		break;
4465 
4466     /*
4467      * nested expression: (expression).
4468      */
4469     case '(':	*arg = skipwhite(*arg + 1);
4470 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4471 		if (**arg == ')')
4472 		    ++*arg;
4473 		else if (ret == OK)
4474 		{
4475 		    EMSG(_("E110: Missing ')'"));
4476 		    clear_tv(rettv);
4477 		    ret = FAIL;
4478 		}
4479 		break;
4480 
4481     default:	ret = NOTDONE;
4482 		break;
4483     }
4484 
4485     if (ret == NOTDONE)
4486     {
4487 	/*
4488 	 * Must be a variable or function name.
4489 	 * Can also be a curly-braces kind of name: {expr}.
4490 	 */
4491 	s = *arg;
4492 	len = get_name_len(arg, &alias, evaluate, TRUE);
4493 	if (alias != NULL)
4494 	    s = alias;
4495 
4496 	if (len <= 0)
4497 	    ret = FAIL;
4498 	else
4499 	{
4500 	    if (**arg == '(')		/* recursive! */
4501 	    {
4502 		/* If "s" is the name of a variable of type VAR_FUNC
4503 		 * use its contents. */
4504 		s = deref_func_name(s, &len);
4505 
4506 		/* Invoke the function. */
4507 		ret = get_func_tv(s, len, rettv, arg,
4508 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4509 			  &len, evaluate, NULL);
4510 		/* Stop the expression evaluation when immediately
4511 		 * aborting on error, or when an interrupt occurred or
4512 		 * an exception was thrown but not caught. */
4513 		if (aborting())
4514 		{
4515 		    if (ret == OK)
4516 			clear_tv(rettv);
4517 		    ret = FAIL;
4518 		}
4519 	    }
4520 	    else if (evaluate)
4521 		ret = get_var_tv(s, len, rettv, TRUE);
4522 	    else
4523 		ret = OK;
4524 	}
4525 
4526 	if (alias != NULL)
4527 	    vim_free(alias);
4528     }
4529 
4530     *arg = skipwhite(*arg);
4531 
4532     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4533      * expr(expr). */
4534     if (ret == OK)
4535 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4536 
4537     /*
4538      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4539      */
4540     if (ret == OK && evaluate && end_leader > start_leader)
4541     {
4542 	int	    error = FALSE;
4543 
4544 	val = get_tv_number_chk(rettv, &error);
4545 	if (error)
4546 	{
4547 	    clear_tv(rettv);
4548 	    ret = FAIL;
4549 	}
4550 	else
4551 	{
4552 	    while (end_leader > start_leader)
4553 	    {
4554 		--end_leader;
4555 		if (*end_leader == '!')
4556 		    val = !val;
4557 		else if (*end_leader == '-')
4558 		    val = -val;
4559 	    }
4560 	    clear_tv(rettv);
4561 	    rettv->v_type = VAR_NUMBER;
4562 	    rettv->vval.v_number = val;
4563 	}
4564     }
4565 
4566     return ret;
4567 }
4568 
4569 /*
4570  * Evaluate an "[expr]" or "[expr:expr]" index.
4571  * "*arg" points to the '['.
4572  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4573  */
4574     static int
4575 eval_index(arg, rettv, evaluate, verbose)
4576     char_u	**arg;
4577     typval_T	*rettv;
4578     int		evaluate;
4579     int		verbose;	/* give error messages */
4580 {
4581     int		empty1 = FALSE, empty2 = FALSE;
4582     typval_T	var1, var2;
4583     long	n1, n2 = 0;
4584     long	len = -1;
4585     int		range = FALSE;
4586     char_u	*s;
4587     char_u	*key = NULL;
4588 
4589     if (rettv->v_type == VAR_FUNC)
4590     {
4591 	if (verbose)
4592 	    EMSG(_("E695: Cannot index a Funcref"));
4593 	return FAIL;
4594     }
4595 
4596     if (**arg == '.')
4597     {
4598 	/*
4599 	 * dict.name
4600 	 */
4601 	key = *arg + 1;
4602 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4603 	    ;
4604 	if (len == 0)
4605 	    return FAIL;
4606 	*arg = skipwhite(key + len);
4607     }
4608     else
4609     {
4610 	/*
4611 	 * something[idx]
4612 	 *
4613 	 * Get the (first) variable from inside the [].
4614 	 */
4615 	*arg = skipwhite(*arg + 1);
4616 	if (**arg == ':')
4617 	    empty1 = TRUE;
4618 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4619 	    return FAIL;
4620 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4621 	{
4622 	    /* not a number or string */
4623 	    clear_tv(&var1);
4624 	    return FAIL;
4625 	}
4626 
4627 	/*
4628 	 * Get the second variable from inside the [:].
4629 	 */
4630 	if (**arg == ':')
4631 	{
4632 	    range = TRUE;
4633 	    *arg = skipwhite(*arg + 1);
4634 	    if (**arg == ']')
4635 		empty2 = TRUE;
4636 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4637 	    {
4638 		if (!empty1)
4639 		    clear_tv(&var1);
4640 		return FAIL;
4641 	    }
4642 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4643 	    {
4644 		/* not a number or string */
4645 		if (!empty1)
4646 		    clear_tv(&var1);
4647 		clear_tv(&var2);
4648 		return FAIL;
4649 	    }
4650 	}
4651 
4652 	/* Check for the ']'. */
4653 	if (**arg != ']')
4654 	{
4655 	    if (verbose)
4656 		EMSG(_(e_missbrac));
4657 	    clear_tv(&var1);
4658 	    if (range)
4659 		clear_tv(&var2);
4660 	    return FAIL;
4661 	}
4662 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4663     }
4664 
4665     if (evaluate)
4666     {
4667 	n1 = 0;
4668 	if (!empty1 && rettv->v_type != VAR_DICT)
4669 	{
4670 	    n1 = get_tv_number(&var1);
4671 	    clear_tv(&var1);
4672 	}
4673 	if (range)
4674 	{
4675 	    if (empty2)
4676 		n2 = -1;
4677 	    else
4678 	    {
4679 		n2 = get_tv_number(&var2);
4680 		clear_tv(&var2);
4681 	    }
4682 	}
4683 
4684 	switch (rettv->v_type)
4685 	{
4686 	    case VAR_NUMBER:
4687 	    case VAR_STRING:
4688 		s = get_tv_string(rettv);
4689 		len = (long)STRLEN(s);
4690 		if (range)
4691 		{
4692 		    /* The resulting variable is a substring.  If the indexes
4693 		     * are out of range the result is empty. */
4694 		    if (n1 < 0)
4695 		    {
4696 			n1 = len + n1;
4697 			if (n1 < 0)
4698 			    n1 = 0;
4699 		    }
4700 		    if (n2 < 0)
4701 			n2 = len + n2;
4702 		    else if (n2 >= len)
4703 			n2 = len;
4704 		    if (n1 >= len || n2 < 0 || n1 > n2)
4705 			s = NULL;
4706 		    else
4707 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4708 		}
4709 		else
4710 		{
4711 		    /* The resulting variable is a string of a single
4712 		     * character.  If the index is too big or negative the
4713 		     * result is empty. */
4714 		    if (n1 >= len || n1 < 0)
4715 			s = NULL;
4716 		    else
4717 			s = vim_strnsave(s + n1, 1);
4718 		}
4719 		clear_tv(rettv);
4720 		rettv->v_type = VAR_STRING;
4721 		rettv->vval.v_string = s;
4722 		break;
4723 
4724 	    case VAR_LIST:
4725 		len = list_len(rettv->vval.v_list);
4726 		if (n1 < 0)
4727 		    n1 = len + n1;
4728 		if (!empty1 && (n1 < 0 || n1 >= len))
4729 		{
4730 		    if (verbose)
4731 			EMSGN(_(e_listidx), n1);
4732 		    return FAIL;
4733 		}
4734 		if (range)
4735 		{
4736 		    list_T	*l;
4737 		    listitem_T	*item;
4738 
4739 		    if (n2 < 0)
4740 			n2 = len + n2;
4741 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4742 		    {
4743 			if (verbose)
4744 			    EMSGN(_(e_listidx), n2);
4745 			return FAIL;
4746 		    }
4747 		    l = list_alloc();
4748 		    if (l == NULL)
4749 			return FAIL;
4750 		    for (item = list_find(rettv->vval.v_list, n1);
4751 							       n1 <= n2; ++n1)
4752 		    {
4753 			if (list_append_tv(l, &item->li_tv) == FAIL)
4754 			{
4755 			    list_free(l);
4756 			    return FAIL;
4757 			}
4758 			item = item->li_next;
4759 		    }
4760 		    clear_tv(rettv);
4761 		    rettv->v_type = VAR_LIST;
4762 		    rettv->vval.v_list = l;
4763 		    ++l->lv_refcount;
4764 		}
4765 		else
4766 		{
4767 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4768 								       &var1);
4769 		    clear_tv(rettv);
4770 		    *rettv = var1;
4771 		}
4772 		break;
4773 
4774 	    case VAR_DICT:
4775 		if (range)
4776 		{
4777 		    if (verbose)
4778 			EMSG(_(e_dictrange));
4779 		    if (len == -1)
4780 			clear_tv(&var1);
4781 		    return FAIL;
4782 		}
4783 		{
4784 		    dictitem_T	*item;
4785 
4786 		    if (len == -1)
4787 		    {
4788 			key = get_tv_string(&var1);
4789 			if (*key == NUL)
4790 			{
4791 			    if (verbose)
4792 				EMSG(_(e_emptykey));
4793 			    clear_tv(&var1);
4794 			    return FAIL;
4795 			}
4796 		    }
4797 
4798 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4799 
4800 		    if (item == NULL && verbose)
4801 			EMSG2(_(e_dictkey), key);
4802 		    if (len == -1)
4803 			clear_tv(&var1);
4804 		    if (item == NULL)
4805 			return FAIL;
4806 
4807 		    copy_tv(&item->di_tv, &var1);
4808 		    clear_tv(rettv);
4809 		    *rettv = var1;
4810 		}
4811 		break;
4812 	}
4813     }
4814 
4815     return OK;
4816 }
4817 
4818 /*
4819  * Get an option value.
4820  * "arg" points to the '&' or '+' before the option name.
4821  * "arg" is advanced to character after the option name.
4822  * Return OK or FAIL.
4823  */
4824     static int
4825 get_option_tv(arg, rettv, evaluate)
4826     char_u	**arg;
4827     typval_T	*rettv;	/* when NULL, only check if option exists */
4828     int		evaluate;
4829 {
4830     char_u	*option_end;
4831     long	numval;
4832     char_u	*stringval;
4833     int		opt_type;
4834     int		c;
4835     int		working = (**arg == '+');    /* has("+option") */
4836     int		ret = OK;
4837     int		opt_flags;
4838 
4839     /*
4840      * Isolate the option name and find its value.
4841      */
4842     option_end = find_option_end(arg, &opt_flags);
4843     if (option_end == NULL)
4844     {
4845 	if (rettv != NULL)
4846 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4847 	return FAIL;
4848     }
4849 
4850     if (!evaluate)
4851     {
4852 	*arg = option_end;
4853 	return OK;
4854     }
4855 
4856     c = *option_end;
4857     *option_end = NUL;
4858     opt_type = get_option_value(*arg, &numval,
4859 			       rettv == NULL ? NULL : &stringval, opt_flags);
4860 
4861     if (opt_type == -3)			/* invalid name */
4862     {
4863 	if (rettv != NULL)
4864 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4865 	ret = FAIL;
4866     }
4867     else if (rettv != NULL)
4868     {
4869 	if (opt_type == -2)		/* hidden string option */
4870 	{
4871 	    rettv->v_type = VAR_STRING;
4872 	    rettv->vval.v_string = NULL;
4873 	}
4874 	else if (opt_type == -1)	/* hidden number option */
4875 	{
4876 	    rettv->v_type = VAR_NUMBER;
4877 	    rettv->vval.v_number = 0;
4878 	}
4879 	else if (opt_type == 1)		/* number option */
4880 	{
4881 	    rettv->v_type = VAR_NUMBER;
4882 	    rettv->vval.v_number = numval;
4883 	}
4884 	else				/* string option */
4885 	{
4886 	    rettv->v_type = VAR_STRING;
4887 	    rettv->vval.v_string = stringval;
4888 	}
4889     }
4890     else if (working && (opt_type == -2 || opt_type == -1))
4891 	ret = FAIL;
4892 
4893     *option_end = c;		    /* put back for error messages */
4894     *arg = option_end;
4895 
4896     return ret;
4897 }
4898 
4899 /*
4900  * Allocate a variable for a string constant.
4901  * Return OK or FAIL.
4902  */
4903     static int
4904 get_string_tv(arg, rettv, evaluate)
4905     char_u	**arg;
4906     typval_T	*rettv;
4907     int		evaluate;
4908 {
4909     char_u	*p;
4910     char_u	*name;
4911     int		extra = 0;
4912 
4913     /*
4914      * Find the end of the string, skipping backslashed characters.
4915      */
4916     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4917     {
4918 	if (*p == '\\' && p[1] != NUL)
4919 	{
4920 	    ++p;
4921 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4922 	     * to 6 characters: reserve space for 2 extra */
4923 	    if (*p == '<')
4924 		extra += 2;
4925 	}
4926     }
4927 
4928     if (*p != '"')
4929     {
4930 	EMSG2(_("E114: Missing quote: %s"), *arg);
4931 	return FAIL;
4932     }
4933 
4934     /* If only parsing, set *arg and return here */
4935     if (!evaluate)
4936     {
4937 	*arg = p + 1;
4938 	return OK;
4939     }
4940 
4941     /*
4942      * Copy the string into allocated memory, handling backslashed
4943      * characters.
4944      */
4945     name = alloc((unsigned)(p - *arg + extra));
4946     if (name == NULL)
4947 	return FAIL;
4948     rettv->v_type = VAR_STRING;
4949     rettv->vval.v_string = name;
4950 
4951     for (p = *arg + 1; *p != NUL && *p != '"'; )
4952     {
4953 	if (*p == '\\')
4954 	{
4955 	    switch (*++p)
4956 	    {
4957 		case 'b': *name++ = BS; ++p; break;
4958 		case 'e': *name++ = ESC; ++p; break;
4959 		case 'f': *name++ = FF; ++p; break;
4960 		case 'n': *name++ = NL; ++p; break;
4961 		case 'r': *name++ = CAR; ++p; break;
4962 		case 't': *name++ = TAB; ++p; break;
4963 
4964 		case 'X': /* hex: "\x1", "\x12" */
4965 		case 'x':
4966 		case 'u': /* Unicode: "\u0023" */
4967 		case 'U':
4968 			  if (vim_isxdigit(p[1]))
4969 			  {
4970 			      int	n, nr;
4971 			      int	c = toupper(*p);
4972 
4973 			      if (c == 'X')
4974 				  n = 2;
4975 			      else
4976 				  n = 4;
4977 			      nr = 0;
4978 			      while (--n >= 0 && vim_isxdigit(p[1]))
4979 			      {
4980 				  ++p;
4981 				  nr = (nr << 4) + hex2nr(*p);
4982 			      }
4983 			      ++p;
4984 #ifdef FEAT_MBYTE
4985 			      /* For "\u" store the number according to
4986 			       * 'encoding'. */
4987 			      if (c != 'X')
4988 				  name += (*mb_char2bytes)(nr, name);
4989 			      else
4990 #endif
4991 				  *name++ = nr;
4992 			  }
4993 			  break;
4994 
4995 			  /* octal: "\1", "\12", "\123" */
4996 		case '0':
4997 		case '1':
4998 		case '2':
4999 		case '3':
5000 		case '4':
5001 		case '5':
5002 		case '6':
5003 		case '7': *name = *p++ - '0';
5004 			  if (*p >= '0' && *p <= '7')
5005 			  {
5006 			      *name = (*name << 3) + *p++ - '0';
5007 			      if (*p >= '0' && *p <= '7')
5008 				  *name = (*name << 3) + *p++ - '0';
5009 			  }
5010 			  ++name;
5011 			  break;
5012 
5013 			    /* Special key, e.g.: "\<C-W>" */
5014 		case '<': extra = trans_special(&p, name, TRUE);
5015 			  if (extra != 0)
5016 			  {
5017 			      name += extra;
5018 			      break;
5019 			  }
5020 			  /* FALLTHROUGH */
5021 
5022 		default:  MB_COPY_CHAR(p, name);
5023 			  break;
5024 	    }
5025 	}
5026 	else
5027 	    MB_COPY_CHAR(p, name);
5028 
5029     }
5030     *name = NUL;
5031     *arg = p + 1;
5032 
5033     return OK;
5034 }
5035 
5036 /*
5037  * Allocate a variable for a 'str''ing' constant.
5038  * Return OK or FAIL.
5039  */
5040     static int
5041 get_lit_string_tv(arg, rettv, evaluate)
5042     char_u	**arg;
5043     typval_T	*rettv;
5044     int		evaluate;
5045 {
5046     char_u	*p;
5047     char_u	*str;
5048     int		reduce = 0;
5049 
5050     /*
5051      * Find the end of the string, skipping ''.
5052      */
5053     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5054     {
5055 	if (*p == '\'')
5056 	{
5057 	    if (p[1] != '\'')
5058 		break;
5059 	    ++reduce;
5060 	    ++p;
5061 	}
5062     }
5063 
5064     if (*p != '\'')
5065     {
5066 	EMSG2(_("E115: Missing quote: %s"), *arg);
5067 	return FAIL;
5068     }
5069 
5070     /* If only parsing return after setting "*arg" */
5071     if (!evaluate)
5072     {
5073 	*arg = p + 1;
5074 	return OK;
5075     }
5076 
5077     /*
5078      * Copy the string into allocated memory, handling '' to ' reduction.
5079      */
5080     str = alloc((unsigned)((p - *arg) - reduce));
5081     if (str == NULL)
5082 	return FAIL;
5083     rettv->v_type = VAR_STRING;
5084     rettv->vval.v_string = str;
5085 
5086     for (p = *arg + 1; *p != NUL; )
5087     {
5088 	if (*p == '\'')
5089 	{
5090 	    if (p[1] != '\'')
5091 		break;
5092 	    ++p;
5093 	}
5094 	MB_COPY_CHAR(p, str);
5095     }
5096     *str = NUL;
5097     *arg = p + 1;
5098 
5099     return OK;
5100 }
5101 
5102 /*
5103  * Allocate a variable for a List and fill it from "*arg".
5104  * Return OK or FAIL.
5105  */
5106     static int
5107 get_list_tv(arg, rettv, evaluate)
5108     char_u	**arg;
5109     typval_T	*rettv;
5110     int		evaluate;
5111 {
5112     list_T	*l = NULL;
5113     typval_T	tv;
5114     listitem_T	*item;
5115 
5116     if (evaluate)
5117     {
5118 	l = list_alloc();
5119 	if (l == NULL)
5120 	    return FAIL;
5121     }
5122 
5123     *arg = skipwhite(*arg + 1);
5124     while (**arg != ']' && **arg != NUL)
5125     {
5126 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5127 	    goto failret;
5128 	if (evaluate)
5129 	{
5130 	    item = listitem_alloc();
5131 	    if (item != NULL)
5132 	    {
5133 		item->li_tv = tv;
5134 		item->li_tv.v_lock = 0;
5135 		list_append(l, item);
5136 	    }
5137 	    else
5138 		clear_tv(&tv);
5139 	}
5140 
5141 	if (**arg == ']')
5142 	    break;
5143 	if (**arg != ',')
5144 	{
5145 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5146 	    goto failret;
5147 	}
5148 	*arg = skipwhite(*arg + 1);
5149     }
5150 
5151     if (**arg != ']')
5152     {
5153 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5154 failret:
5155 	if (evaluate)
5156 	    list_free(l);
5157 	return FAIL;
5158     }
5159 
5160     *arg = skipwhite(*arg + 1);
5161     if (evaluate)
5162     {
5163 	rettv->v_type = VAR_LIST;
5164 	rettv->vval.v_list = l;
5165 	++l->lv_refcount;
5166     }
5167 
5168     return OK;
5169 }
5170 
5171 /*
5172  * Allocate an empty header for a list.
5173  */
5174     static list_T *
5175 list_alloc()
5176 {
5177     list_T  *l;
5178 
5179     l = (list_T *)alloc_clear(sizeof(list_T));
5180     if (l != NULL)
5181     {
5182 	/* Prepend the list to the list of lists for garbage collection. */
5183 	if (first_list != NULL)
5184 	    first_list->lv_used_prev = l;
5185 	l->lv_used_prev = NULL;
5186 	l->lv_used_next = first_list;
5187 	first_list = l;
5188     }
5189     return l;
5190 }
5191 
5192 /*
5193  * Unreference a list: decrement the reference count and free it when it
5194  * becomes zero.
5195  */
5196     void
5197 list_unref(l)
5198     list_T *l;
5199 {
5200     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5201 	list_free(l);
5202 }
5203 
5204 /*
5205  * Free a list, including all items it points to.
5206  * Ignores the reference count.
5207  */
5208     static void
5209 list_free(l)
5210     list_T *l;
5211 {
5212     listitem_T *item;
5213 
5214     /* Avoid that recursive reference to the list frees us again. */
5215     l->lv_refcount = DEL_REFCOUNT;
5216 
5217     /* Remove the list from the list of lists for garbage collection. */
5218     if (l->lv_used_prev == NULL)
5219 	first_list = l->lv_used_next;
5220     else
5221 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5222     if (l->lv_used_next != NULL)
5223 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5224 
5225     for (item = l->lv_first; item != NULL; item = l->lv_first)
5226     {
5227 	/* Remove the item before deleting it. */
5228 	l->lv_first = item->li_next;
5229 	listitem_free(item);
5230     }
5231     vim_free(l);
5232 }
5233 
5234 /*
5235  * Allocate a list item.
5236  */
5237     static listitem_T *
5238 listitem_alloc()
5239 {
5240     return (listitem_T *)alloc(sizeof(listitem_T));
5241 }
5242 
5243 /*
5244  * Free a list item.  Also clears the value.  Does not notify watchers.
5245  */
5246     static void
5247 listitem_free(item)
5248     listitem_T *item;
5249 {
5250     clear_tv(&item->li_tv);
5251     vim_free(item);
5252 }
5253 
5254 /*
5255  * Remove a list item from a List and free it.  Also clears the value.
5256  */
5257     static void
5258 listitem_remove(l, item)
5259     list_T  *l;
5260     listitem_T *item;
5261 {
5262     list_remove(l, item, item);
5263     listitem_free(item);
5264 }
5265 
5266 /*
5267  * Get the number of items in a list.
5268  */
5269     static long
5270 list_len(l)
5271     list_T	*l;
5272 {
5273     if (l == NULL)
5274 	return 0L;
5275     return l->lv_len;
5276 }
5277 
5278 /*
5279  * Return TRUE when two lists have exactly the same values.
5280  */
5281     static int
5282 list_equal(l1, l2, ic)
5283     list_T	*l1;
5284     list_T	*l2;
5285     int		ic;	/* ignore case for strings */
5286 {
5287     listitem_T	*item1, *item2;
5288 
5289     if (list_len(l1) != list_len(l2))
5290 	return FALSE;
5291 
5292     for (item1 = l1->lv_first, item2 = l2->lv_first;
5293 	    item1 != NULL && item2 != NULL;
5294 			       item1 = item1->li_next, item2 = item2->li_next)
5295 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5296 	    return FALSE;
5297     return item1 == NULL && item2 == NULL;
5298 }
5299 
5300 /*
5301  * Return TRUE when two dictionaries have exactly the same key/values.
5302  */
5303     static int
5304 dict_equal(d1, d2, ic)
5305     dict_T	*d1;
5306     dict_T	*d2;
5307     int		ic;	/* ignore case for strings */
5308 {
5309     hashitem_T	*hi;
5310     dictitem_T	*item2;
5311     int		todo;
5312 
5313     if (dict_len(d1) != dict_len(d2))
5314 	return FALSE;
5315 
5316     todo = d1->dv_hashtab.ht_used;
5317     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5318     {
5319 	if (!HASHITEM_EMPTY(hi))
5320 	{
5321 	    item2 = dict_find(d2, hi->hi_key, -1);
5322 	    if (item2 == NULL)
5323 		return FALSE;
5324 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5325 		return FALSE;
5326 	    --todo;
5327 	}
5328     }
5329     return TRUE;
5330 }
5331 
5332 /*
5333  * Return TRUE if "tv1" and "tv2" have the same value.
5334  * Compares the items just like "==" would compare them, but strings and
5335  * numbers are different.
5336  */
5337     static int
5338 tv_equal(tv1, tv2, ic)
5339     typval_T *tv1;
5340     typval_T *tv2;
5341     int	    ic;	    /* ignore case */
5342 {
5343     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5344     char_u	*s1, *s2;
5345 
5346     if (tv1->v_type != tv2->v_type)
5347 	return FALSE;
5348 
5349     switch (tv1->v_type)
5350     {
5351 	case VAR_LIST:
5352 	    /* recursive! */
5353 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5354 
5355 	case VAR_DICT:
5356 	    /* recursive! */
5357 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5358 
5359 	case VAR_FUNC:
5360 	    return (tv1->vval.v_string != NULL
5361 		    && tv2->vval.v_string != NULL
5362 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5363 
5364 	case VAR_NUMBER:
5365 	    return tv1->vval.v_number == tv2->vval.v_number;
5366 
5367 	case VAR_STRING:
5368 	    s1 = get_tv_string_buf(tv1, buf1);
5369 	    s2 = get_tv_string_buf(tv2, buf2);
5370 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5371     }
5372 
5373     EMSG2(_(e_intern2), "tv_equal()");
5374     return TRUE;
5375 }
5376 
5377 /*
5378  * Locate item with index "n" in list "l" and return it.
5379  * A negative index is counted from the end; -1 is the last item.
5380  * Returns NULL when "n" is out of range.
5381  */
5382     static listitem_T *
5383 list_find(l, n)
5384     list_T	*l;
5385     long	n;
5386 {
5387     listitem_T	*item;
5388     long	idx;
5389 
5390     if (l == NULL)
5391 	return NULL;
5392 
5393     /* Negative index is relative to the end. */
5394     if (n < 0)
5395 	n = l->lv_len + n;
5396 
5397     /* Check for index out of range. */
5398     if (n < 0 || n >= l->lv_len)
5399 	return NULL;
5400 
5401     /* When there is a cached index may start search from there. */
5402     if (l->lv_idx_item != NULL)
5403     {
5404 	if (n < l->lv_idx / 2)
5405 	{
5406 	    /* closest to the start of the list */
5407 	    item = l->lv_first;
5408 	    idx = 0;
5409 	}
5410 	else if (n > (l->lv_idx + l->lv_len) / 2)
5411 	{
5412 	    /* closest to the end of the list */
5413 	    item = l->lv_last;
5414 	    idx = l->lv_len - 1;
5415 	}
5416 	else
5417 	{
5418 	    /* closest to the cached index */
5419 	    item = l->lv_idx_item;
5420 	    idx = l->lv_idx;
5421 	}
5422     }
5423     else
5424     {
5425 	if (n < l->lv_len / 2)
5426 	{
5427 	    /* closest to the start of the list */
5428 	    item = l->lv_first;
5429 	    idx = 0;
5430 	}
5431 	else
5432 	{
5433 	    /* closest to the end of the list */
5434 	    item = l->lv_last;
5435 	    idx = l->lv_len - 1;
5436 	}
5437     }
5438 
5439     while (n > idx)
5440     {
5441 	/* search forward */
5442 	item = item->li_next;
5443 	++idx;
5444     }
5445     while (n < idx)
5446     {
5447 	/* search backward */
5448 	item = item->li_prev;
5449 	--idx;
5450     }
5451 
5452     /* cache the used index */
5453     l->lv_idx = idx;
5454     l->lv_idx_item = item;
5455 
5456     return item;
5457 }
5458 
5459 /*
5460  * Locate "item" list "l" and return its index.
5461  * Returns -1 when "item" is not in the list.
5462  */
5463     static long
5464 list_idx_of_item(l, item)
5465     list_T	*l;
5466     listitem_T	*item;
5467 {
5468     long	idx = 0;
5469     listitem_T	*li;
5470 
5471     if (l == NULL)
5472 	return -1;
5473     idx = 0;
5474     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5475 	++idx;
5476     if (li == NULL)
5477 	return -1;
5478     return idx;
5479 }
5480 
5481 /*
5482  * Append item "item" to the end of list "l".
5483  */
5484     static void
5485 list_append(l, item)
5486     list_T	*l;
5487     listitem_T	*item;
5488 {
5489     if (l->lv_last == NULL)
5490     {
5491 	/* empty list */
5492 	l->lv_first = item;
5493 	l->lv_last = item;
5494 	item->li_prev = NULL;
5495     }
5496     else
5497     {
5498 	l->lv_last->li_next = item;
5499 	item->li_prev = l->lv_last;
5500 	l->lv_last = item;
5501     }
5502     ++l->lv_len;
5503     item->li_next = NULL;
5504 }
5505 
5506 /*
5507  * Append typval_T "tv" to the end of list "l".
5508  * Return FAIL when out of memory.
5509  */
5510     static int
5511 list_append_tv(l, tv)
5512     list_T	*l;
5513     typval_T	*tv;
5514 {
5515     listitem_T	*li = listitem_alloc();
5516 
5517     if (li == NULL)
5518 	return FAIL;
5519     copy_tv(tv, &li->li_tv);
5520     list_append(l, li);
5521     return OK;
5522 }
5523 
5524 /*
5525  * Add a dictionary to a list.  Used by getqflist().
5526  * Return FAIL when out of memory.
5527  */
5528     int
5529 list_append_dict(list, dict)
5530     list_T	*list;
5531     dict_T	*dict;
5532 {
5533     listitem_T	*li = listitem_alloc();
5534 
5535     if (li == NULL)
5536 	return FAIL;
5537     li->li_tv.v_type = VAR_DICT;
5538     li->li_tv.v_lock = 0;
5539     li->li_tv.vval.v_dict = dict;
5540     list_append(list, li);
5541     ++dict->dv_refcount;
5542     return OK;
5543 }
5544 
5545 /*
5546  * Insert typval_T "tv" in list "l" before "item".
5547  * If "item" is NULL append at the end.
5548  * Return FAIL when out of memory.
5549  */
5550     static int
5551 list_insert_tv(l, tv, item)
5552     list_T	*l;
5553     typval_T	*tv;
5554     listitem_T	*item;
5555 {
5556     listitem_T	*ni = listitem_alloc();
5557 
5558     if (ni == NULL)
5559 	return FAIL;
5560     copy_tv(tv, &ni->li_tv);
5561     if (item == NULL)
5562 	/* Append new item at end of list. */
5563 	list_append(l, ni);
5564     else
5565     {
5566 	/* Insert new item before existing item. */
5567 	ni->li_prev = item->li_prev;
5568 	ni->li_next = item;
5569 	if (item->li_prev == NULL)
5570 	{
5571 	    l->lv_first = ni;
5572 	    ++l->lv_idx;
5573 	}
5574 	else
5575 	{
5576 	    item->li_prev->li_next = ni;
5577 	    l->lv_idx_item = NULL;
5578 	}
5579 	item->li_prev = ni;
5580 	++l->lv_len;
5581     }
5582     return OK;
5583 }
5584 
5585 /*
5586  * Extend "l1" with "l2".
5587  * If "bef" is NULL append at the end, otherwise insert before this item.
5588  * Returns FAIL when out of memory.
5589  */
5590     static int
5591 list_extend(l1, l2, bef)
5592     list_T	*l1;
5593     list_T	*l2;
5594     listitem_T	*bef;
5595 {
5596     listitem_T	*item;
5597 
5598     for (item = l2->lv_first; item != NULL; item = item->li_next)
5599 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5600 	    return FAIL;
5601     return OK;
5602 }
5603 
5604 /*
5605  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5606  * Return FAIL when out of memory.
5607  */
5608     static int
5609 list_concat(l1, l2, tv)
5610     list_T	*l1;
5611     list_T	*l2;
5612     typval_T	*tv;
5613 {
5614     list_T	*l;
5615 
5616     /* make a copy of the first list. */
5617     l = list_copy(l1, FALSE, 0);
5618     if (l == NULL)
5619 	return FAIL;
5620     tv->v_type = VAR_LIST;
5621     tv->vval.v_list = l;
5622 
5623     /* append all items from the second list */
5624     return list_extend(l, l2, NULL);
5625 }
5626 
5627 /*
5628  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5629  * The refcount of the new list is set to 1.
5630  * See item_copy() for "copyID".
5631  * Returns NULL when out of memory.
5632  */
5633     static list_T *
5634 list_copy(orig, deep, copyID)
5635     list_T	*orig;
5636     int		deep;
5637     int		copyID;
5638 {
5639     list_T	*copy;
5640     listitem_T	*item;
5641     listitem_T	*ni;
5642 
5643     if (orig == NULL)
5644 	return NULL;
5645 
5646     copy = list_alloc();
5647     if (copy != NULL)
5648     {
5649 	if (copyID != 0)
5650 	{
5651 	    /* Do this before adding the items, because one of the items may
5652 	     * refer back to this list. */
5653 	    orig->lv_copyID = copyID;
5654 	    orig->lv_copylist = copy;
5655 	}
5656 	for (item = orig->lv_first; item != NULL && !got_int;
5657 							 item = item->li_next)
5658 	{
5659 	    ni = listitem_alloc();
5660 	    if (ni == NULL)
5661 		break;
5662 	    if (deep)
5663 	    {
5664 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5665 		{
5666 		    vim_free(ni);
5667 		    break;
5668 		}
5669 	    }
5670 	    else
5671 		copy_tv(&item->li_tv, &ni->li_tv);
5672 	    list_append(copy, ni);
5673 	}
5674 	++copy->lv_refcount;
5675 	if (item != NULL)
5676 	{
5677 	    list_unref(copy);
5678 	    copy = NULL;
5679 	}
5680     }
5681 
5682     return copy;
5683 }
5684 
5685 /*
5686  * Remove items "item" to "item2" from list "l".
5687  * Does not free the listitem or the value!
5688  */
5689     static void
5690 list_remove(l, item, item2)
5691     list_T	*l;
5692     listitem_T	*item;
5693     listitem_T	*item2;
5694 {
5695     listitem_T	*ip;
5696 
5697     /* notify watchers */
5698     for (ip = item; ip != NULL; ip = ip->li_next)
5699     {
5700 	--l->lv_len;
5701 	list_fix_watch(l, ip);
5702 	if (ip == item2)
5703 	    break;
5704     }
5705 
5706     if (item2->li_next == NULL)
5707 	l->lv_last = item->li_prev;
5708     else
5709 	item2->li_next->li_prev = item->li_prev;
5710     if (item->li_prev == NULL)
5711 	l->lv_first = item2->li_next;
5712     else
5713 	item->li_prev->li_next = item2->li_next;
5714     l->lv_idx_item = NULL;
5715 }
5716 
5717 /*
5718  * Return an allocated string with the string representation of a list.
5719  * May return NULL.
5720  */
5721     static char_u *
5722 list2string(tv)
5723     typval_T	*tv;
5724 {
5725     garray_T	ga;
5726 
5727     if (tv->vval.v_list == NULL)
5728 	return NULL;
5729     ga_init2(&ga, (int)sizeof(char), 80);
5730     ga_append(&ga, '[');
5731     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE) == FAIL)
5732     {
5733 	vim_free(ga.ga_data);
5734 	return NULL;
5735     }
5736     ga_append(&ga, ']');
5737     ga_append(&ga, NUL);
5738     return (char_u *)ga.ga_data;
5739 }
5740 
5741 /*
5742  * Join list "l" into a string in "*gap", using separator "sep".
5743  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5744  * Return FAIL or OK.
5745  */
5746     static int
5747 list_join(gap, l, sep, echo)
5748     garray_T	*gap;
5749     list_T	*l;
5750     char_u	*sep;
5751     int		echo;
5752 {
5753     int		first = TRUE;
5754     char_u	*tofree;
5755     char_u	numbuf[NUMBUFLEN];
5756     listitem_T	*item;
5757     char_u	*s;
5758 
5759     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5760     {
5761 	if (first)
5762 	    first = FALSE;
5763 	else
5764 	    ga_concat(gap, sep);
5765 
5766 	if (echo)
5767 	    s = echo_string(&item->li_tv, &tofree, numbuf);
5768 	else
5769 	    s = tv2string(&item->li_tv, &tofree, numbuf);
5770 	if (s != NULL)
5771 	    ga_concat(gap, s);
5772 	vim_free(tofree);
5773 	if (s == NULL)
5774 	    return FAIL;
5775     }
5776     return OK;
5777 }
5778 
5779 /*
5780  * Garbage collection for lists and dictionaries.
5781  *
5782  * We use reference counts to be able to free most items right away when they
5783  * are no longer used.  But for composite items it's possible that it becomes
5784  * unused while the reference count is > 0: When there is a recursive
5785  * reference.  Example:
5786  *	:let l = [1, 2, 3]
5787  *	:let d = {9: l}
5788  *	:let l[1] = d
5789  *
5790  * Since this is quite unusual we handle this with garbage collection: every
5791  * once in a while find out which lists and dicts are not referenced from any
5792  * variable.
5793  *
5794  * Here is a good reference text about garbage collection (refers to Python
5795  * but it applies to all reference-counting mechanisms):
5796  *	http://python.ca/nas/python/gc/
5797  */
5798 
5799 /*
5800  * Do garbage collection for lists and dicts.
5801  * Return TRUE if some memory was freed.
5802  */
5803     int
5804 garbage_collect()
5805 {
5806     dict_T	*dd;
5807     list_T	*ll;
5808     int		copyID = ++current_copyID;
5809     buf_T	*buf;
5810     win_T	*wp;
5811     int		i;
5812     funccall_T	*fc;
5813     int		did_free = FALSE;
5814 
5815     /*
5816      * 1. Go through all accessible variables and mark all lists and dicts
5817      *    with copyID.
5818      */
5819     /* script-local variables */
5820     for (i = 1; i <= ga_scripts.ga_len; ++i)
5821 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5822 
5823     /* buffer-local variables */
5824     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5825 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5826 
5827     /* window-local variables */
5828     FOR_ALL_WINDOWS(wp)
5829 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5830 
5831     /* global variables */
5832     set_ref_in_ht(&globvarht, copyID);
5833 
5834     /* function-local variables */
5835     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5836     {
5837 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5838 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5839     }
5840 
5841     /*
5842      * 2. Go through the list of dicts and free items without the copyID.
5843      */
5844     for (dd = first_dict; dd != NULL; )
5845 	if (dd->dv_copyID != copyID)
5846 	{
5847 	    dict_free(dd);
5848 	    did_free = TRUE;
5849 
5850 	    /* restart, next dict may also have been freed */
5851 	    dd = first_dict;
5852 	}
5853 	else
5854 	    dd = dd->dv_used_next;
5855 
5856     /*
5857      * 3. Go through the list of lists and free items without the copyID.
5858      */
5859     for (ll = first_list; ll != NULL; )
5860 	if (ll->lv_copyID != copyID)
5861 	{
5862 	    list_free(ll);
5863 	    did_free = TRUE;
5864 
5865 	    /* restart, next dict may also have been freed */
5866 	    ll = first_list;
5867 	}
5868 	else
5869 	    ll = ll->lv_used_next;
5870 
5871     return did_free;
5872 }
5873 
5874 /*
5875  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
5876  */
5877     static void
5878 set_ref_in_ht(ht, copyID)
5879     hashtab_T	*ht;
5880     int		copyID;
5881 {
5882     int		todo;
5883     hashitem_T	*hi;
5884 
5885     todo = ht->ht_used;
5886     for (hi = ht->ht_array; todo > 0; ++hi)
5887 	if (!HASHITEM_EMPTY(hi))
5888 	{
5889 	    --todo;
5890 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
5891 	}
5892 }
5893 
5894 /*
5895  * Mark all lists and dicts referenced through list "l" with "copyID".
5896  */
5897     static void
5898 set_ref_in_list(l, copyID)
5899     list_T	*l;
5900     int		copyID;
5901 {
5902     listitem_T *li;
5903 
5904     for (li = l->lv_first; li != NULL; li = li->li_next)
5905 	set_ref_in_item(&li->li_tv, copyID);
5906 }
5907 
5908 /*
5909  * Mark all lists and dicts referenced through typval "tv" with "copyID".
5910  */
5911     static void
5912 set_ref_in_item(tv, copyID)
5913     typval_T	*tv;
5914     int		copyID;
5915 {
5916     dict_T	*dd;
5917     list_T	*ll;
5918 
5919     switch (tv->v_type)
5920     {
5921 	case VAR_DICT:
5922 	    dd = tv->vval.v_dict;
5923 	    if (dd->dv_copyID != copyID)
5924 	    {
5925 		/* Didn't see this dict yet. */
5926 		dd->dv_copyID = copyID;
5927 		set_ref_in_ht(&dd->dv_hashtab, copyID);
5928 	    }
5929 	    break;
5930 
5931 	case VAR_LIST:
5932 	    ll = tv->vval.v_list;
5933 	    if (ll->lv_copyID != copyID)
5934 	    {
5935 		/* Didn't see this list yet. */
5936 		ll->lv_copyID = copyID;
5937 		set_ref_in_list(ll, copyID);
5938 	    }
5939 	    break;
5940     }
5941     return;
5942 }
5943 
5944 /*
5945  * Allocate an empty header for a dictionary.
5946  */
5947     dict_T *
5948 dict_alloc()
5949 {
5950     dict_T *d;
5951 
5952     d = (dict_T *)alloc(sizeof(dict_T));
5953     if (d != NULL)
5954     {
5955 	/* Add the list to the hashtable for garbage collection. */
5956 	if (first_dict != NULL)
5957 	    first_dict->dv_used_prev = d;
5958 	d->dv_used_next = first_dict;
5959 	d->dv_used_prev = NULL;
5960 
5961 	hash_init(&d->dv_hashtab);
5962 	d->dv_lock = 0;
5963 	d->dv_refcount = 0;
5964 	d->dv_copyID = 0;
5965     }
5966     return d;
5967 }
5968 
5969 /*
5970  * Unreference a Dictionary: decrement the reference count and free it when it
5971  * becomes zero.
5972  */
5973     static void
5974 dict_unref(d)
5975     dict_T *d;
5976 {
5977     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
5978 	dict_free(d);
5979 }
5980 
5981 /*
5982  * Free a Dictionary, including all items it contains.
5983  * Ignores the reference count.
5984  */
5985     static void
5986 dict_free(d)
5987     dict_T *d;
5988 {
5989     int		todo;
5990     hashitem_T	*hi;
5991     dictitem_T	*di;
5992 
5993     /* Avoid that recursive reference to the dict frees us again. */
5994     d->dv_refcount = DEL_REFCOUNT;
5995 
5996     /* Remove the dict from the list of dicts for garbage collection. */
5997     if (d->dv_used_prev == NULL)
5998 	first_dict = d->dv_used_next;
5999     else
6000 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6001     if (d->dv_used_next != NULL)
6002 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6003 
6004     /* Lock the hashtab, we don't want it to resize while freeing items. */
6005     hash_lock(&d->dv_hashtab);
6006     todo = d->dv_hashtab.ht_used;
6007     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6008     {
6009 	if (!HASHITEM_EMPTY(hi))
6010 	{
6011 	    /* Remove the item before deleting it, just in case there is
6012 	     * something recursive causing trouble. */
6013 	    di = HI2DI(hi);
6014 	    hash_remove(&d->dv_hashtab, hi);
6015 	    dictitem_free(di);
6016 	    --todo;
6017 	}
6018     }
6019     hash_clear(&d->dv_hashtab);
6020     vim_free(d);
6021 }
6022 
6023 /*
6024  * Allocate a Dictionary item.
6025  * The "key" is copied to the new item.
6026  * Note that the value of the item "di_tv" still needs to be initialized!
6027  * Returns NULL when out of memory.
6028  */
6029     static dictitem_T *
6030 dictitem_alloc(key)
6031     char_u	*key;
6032 {
6033     dictitem_T *di;
6034 
6035     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6036     if (di != NULL)
6037     {
6038 	STRCPY(di->di_key, key);
6039 	di->di_flags = 0;
6040     }
6041     return di;
6042 }
6043 
6044 /*
6045  * Make a copy of a Dictionary item.
6046  */
6047     static dictitem_T *
6048 dictitem_copy(org)
6049     dictitem_T *org;
6050 {
6051     dictitem_T *di;
6052 
6053     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6054     if (di != NULL)
6055     {
6056 	STRCPY(di->di_key, org->di_key);
6057 	di->di_flags = 0;
6058 	copy_tv(&org->di_tv, &di->di_tv);
6059     }
6060     return di;
6061 }
6062 
6063 /*
6064  * Remove item "item" from Dictionary "dict" and free it.
6065  */
6066     static void
6067 dictitem_remove(dict, item)
6068     dict_T	*dict;
6069     dictitem_T	*item;
6070 {
6071     hashitem_T	*hi;
6072 
6073     hi = hash_find(&dict->dv_hashtab, item->di_key);
6074     if (HASHITEM_EMPTY(hi))
6075 	EMSG2(_(e_intern2), "dictitem_remove()");
6076     else
6077 	hash_remove(&dict->dv_hashtab, hi);
6078     dictitem_free(item);
6079 }
6080 
6081 /*
6082  * Free a dict item.  Also clears the value.
6083  */
6084     static void
6085 dictitem_free(item)
6086     dictitem_T *item;
6087 {
6088     clear_tv(&item->di_tv);
6089     vim_free(item);
6090 }
6091 
6092 /*
6093  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6094  * The refcount of the new dict is set to 1.
6095  * See item_copy() for "copyID".
6096  * Returns NULL when out of memory.
6097  */
6098     static dict_T *
6099 dict_copy(orig, deep, copyID)
6100     dict_T	*orig;
6101     int		deep;
6102     int		copyID;
6103 {
6104     dict_T	*copy;
6105     dictitem_T	*di;
6106     int		todo;
6107     hashitem_T	*hi;
6108 
6109     if (orig == NULL)
6110 	return NULL;
6111 
6112     copy = dict_alloc();
6113     if (copy != NULL)
6114     {
6115 	if (copyID != 0)
6116 	{
6117 	    orig->dv_copyID = copyID;
6118 	    orig->dv_copydict = copy;
6119 	}
6120 	todo = orig->dv_hashtab.ht_used;
6121 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6122 	{
6123 	    if (!HASHITEM_EMPTY(hi))
6124 	    {
6125 		--todo;
6126 
6127 		di = dictitem_alloc(hi->hi_key);
6128 		if (di == NULL)
6129 		    break;
6130 		if (deep)
6131 		{
6132 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6133 							      copyID) == FAIL)
6134 		    {
6135 			vim_free(di);
6136 			break;
6137 		    }
6138 		}
6139 		else
6140 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6141 		if (dict_add(copy, di) == FAIL)
6142 		{
6143 		    dictitem_free(di);
6144 		    break;
6145 		}
6146 	    }
6147 	}
6148 
6149 	++copy->dv_refcount;
6150 	if (todo > 0)
6151 	{
6152 	    dict_unref(copy);
6153 	    copy = NULL;
6154 	}
6155     }
6156 
6157     return copy;
6158 }
6159 
6160 /*
6161  * Add item "item" to Dictionary "d".
6162  * Returns FAIL when out of memory and when key already existed.
6163  */
6164     static int
6165 dict_add(d, item)
6166     dict_T	*d;
6167     dictitem_T	*item;
6168 {
6169     return hash_add(&d->dv_hashtab, item->di_key);
6170 }
6171 
6172 /*
6173  * Add a number or string entry to dictionary "d".
6174  * When "str" is NULL use number "nr", otherwise use "str".
6175  * Returns FAIL when out of memory and when key already exists.
6176  */
6177     int
6178 dict_add_nr_str(d, key, nr, str)
6179     dict_T	*d;
6180     char	*key;
6181     long	nr;
6182     char_u	*str;
6183 {
6184     dictitem_T	*item;
6185 
6186     item = dictitem_alloc((char_u *)key);
6187     if (item == NULL)
6188 	return FAIL;
6189     item->di_tv.v_lock = 0;
6190     if (str == NULL)
6191     {
6192 	item->di_tv.v_type = VAR_NUMBER;
6193 	item->di_tv.vval.v_number = nr;
6194     }
6195     else
6196     {
6197 	item->di_tv.v_type = VAR_STRING;
6198 	item->di_tv.vval.v_string = vim_strsave(str);
6199     }
6200     if (dict_add(d, item) == FAIL)
6201     {
6202 	dictitem_free(item);
6203 	return FAIL;
6204     }
6205     return OK;
6206 }
6207 
6208 /*
6209  * Get the number of items in a Dictionary.
6210  */
6211     static long
6212 dict_len(d)
6213     dict_T	*d;
6214 {
6215     if (d == NULL)
6216 	return 0L;
6217     return d->dv_hashtab.ht_used;
6218 }
6219 
6220 /*
6221  * Find item "key[len]" in Dictionary "d".
6222  * If "len" is negative use strlen(key).
6223  * Returns NULL when not found.
6224  */
6225     static dictitem_T *
6226 dict_find(d, key, len)
6227     dict_T	*d;
6228     char_u	*key;
6229     int		len;
6230 {
6231 #define AKEYLEN 200
6232     char_u	buf[AKEYLEN];
6233     char_u	*akey;
6234     char_u	*tofree = NULL;
6235     hashitem_T	*hi;
6236 
6237     if (len < 0)
6238 	akey = key;
6239     else if (len >= AKEYLEN)
6240     {
6241 	tofree = akey = vim_strnsave(key, len);
6242 	if (akey == NULL)
6243 	    return NULL;
6244     }
6245     else
6246     {
6247 	/* Avoid a malloc/free by using buf[]. */
6248 	vim_strncpy(buf, key, len);
6249 	akey = buf;
6250     }
6251 
6252     hi = hash_find(&d->dv_hashtab, akey);
6253     vim_free(tofree);
6254     if (HASHITEM_EMPTY(hi))
6255 	return NULL;
6256     return HI2DI(hi);
6257 }
6258 
6259 /*
6260  * Get a string item from a dictionary in allocated memory.
6261  * Returns NULL if the entry doesn't exist or out of memory.
6262  */
6263     char_u *
6264 get_dict_string(d, key)
6265     dict_T	*d;
6266     char_u	*key;
6267 {
6268     dictitem_T	*di;
6269 
6270     di = dict_find(d, key, -1);
6271     if (di == NULL)
6272 	return NULL;
6273     return vim_strsave(get_tv_string(&di->di_tv));
6274 }
6275 
6276 /*
6277  * Get a number item from a dictionary.
6278  * Returns 0 if the entry doesn't exist or out of memory.
6279  */
6280     long
6281 get_dict_number(d, key)
6282     dict_T	*d;
6283     char_u	*key;
6284 {
6285     dictitem_T	*di;
6286 
6287     di = dict_find(d, key, -1);
6288     if (di == NULL)
6289 	return 0;
6290     return get_tv_number(&di->di_tv);
6291 }
6292 
6293 /*
6294  * Return an allocated string with the string representation of a Dictionary.
6295  * May return NULL.
6296  */
6297     static char_u *
6298 dict2string(tv)
6299     typval_T	*tv;
6300 {
6301     garray_T	ga;
6302     int		first = TRUE;
6303     char_u	*tofree;
6304     char_u	numbuf[NUMBUFLEN];
6305     hashitem_T	*hi;
6306     char_u	*s;
6307     dict_T	*d;
6308     int		todo;
6309 
6310     if ((d = tv->vval.v_dict) == NULL)
6311 	return NULL;
6312     ga_init2(&ga, (int)sizeof(char), 80);
6313     ga_append(&ga, '{');
6314 
6315     todo = d->dv_hashtab.ht_used;
6316     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6317     {
6318 	if (!HASHITEM_EMPTY(hi))
6319 	{
6320 	    --todo;
6321 
6322 	    if (first)
6323 		first = FALSE;
6324 	    else
6325 		ga_concat(&ga, (char_u *)", ");
6326 
6327 	    tofree = string_quote(hi->hi_key, FALSE);
6328 	    if (tofree != NULL)
6329 	    {
6330 		ga_concat(&ga, tofree);
6331 		vim_free(tofree);
6332 	    }
6333 	    ga_concat(&ga, (char_u *)": ");
6334 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf);
6335 	    if (s != NULL)
6336 		ga_concat(&ga, s);
6337 	    vim_free(tofree);
6338 	    if (s == NULL)
6339 		break;
6340 	}
6341     }
6342     if (todo > 0)
6343     {
6344 	vim_free(ga.ga_data);
6345 	return NULL;
6346     }
6347 
6348     ga_append(&ga, '}');
6349     ga_append(&ga, NUL);
6350     return (char_u *)ga.ga_data;
6351 }
6352 
6353 /*
6354  * Allocate a variable for a Dictionary and fill it from "*arg".
6355  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6356  */
6357     static int
6358 get_dict_tv(arg, rettv, evaluate)
6359     char_u	**arg;
6360     typval_T	*rettv;
6361     int		evaluate;
6362 {
6363     dict_T	*d = NULL;
6364     typval_T	tvkey;
6365     typval_T	tv;
6366     char_u	*key;
6367     dictitem_T	*item;
6368     char_u	*start = skipwhite(*arg + 1);
6369     char_u	buf[NUMBUFLEN];
6370 
6371     /*
6372      * First check if it's not a curly-braces thing: {expr}.
6373      * Must do this without evaluating, otherwise a function may be called
6374      * twice.  Unfortunately this means we need to call eval1() twice for the
6375      * first item.
6376      * But {} is an empty Dictionary.
6377      */
6378     if (*start != '}')
6379     {
6380 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6381 	    return FAIL;
6382 	if (*start == '}')
6383 	    return NOTDONE;
6384     }
6385 
6386     if (evaluate)
6387     {
6388 	d = dict_alloc();
6389 	if (d == NULL)
6390 	    return FAIL;
6391     }
6392     tvkey.v_type = VAR_UNKNOWN;
6393     tv.v_type = VAR_UNKNOWN;
6394 
6395     *arg = skipwhite(*arg + 1);
6396     while (**arg != '}' && **arg != NUL)
6397     {
6398 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6399 	    goto failret;
6400 	if (**arg != ':')
6401 	{
6402 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6403 	    clear_tv(&tvkey);
6404 	    goto failret;
6405 	}
6406 	key = get_tv_string_buf_chk(&tvkey, buf);
6407 	if (key == NULL || *key == NUL)
6408 	{
6409 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6410 	    if (key != NULL)
6411 		EMSG(_(e_emptykey));
6412 	    clear_tv(&tvkey);
6413 	    goto failret;
6414 	}
6415 
6416 	*arg = skipwhite(*arg + 1);
6417 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6418 	{
6419 	    clear_tv(&tvkey);
6420 	    goto failret;
6421 	}
6422 	if (evaluate)
6423 	{
6424 	    item = dict_find(d, key, -1);
6425 	    if (item != NULL)
6426 	    {
6427 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6428 		clear_tv(&tvkey);
6429 		clear_tv(&tv);
6430 		goto failret;
6431 	    }
6432 	    item = dictitem_alloc(key);
6433 	    clear_tv(&tvkey);
6434 	    if (item != NULL)
6435 	    {
6436 		item->di_tv = tv;
6437 		item->di_tv.v_lock = 0;
6438 		if (dict_add(d, item) == FAIL)
6439 		    dictitem_free(item);
6440 	    }
6441 	}
6442 
6443 	if (**arg == '}')
6444 	    break;
6445 	if (**arg != ',')
6446 	{
6447 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6448 	    goto failret;
6449 	}
6450 	*arg = skipwhite(*arg + 1);
6451     }
6452 
6453     if (**arg != '}')
6454     {
6455 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6456 failret:
6457 	if (evaluate)
6458 	    dict_free(d);
6459 	return FAIL;
6460     }
6461 
6462     *arg = skipwhite(*arg + 1);
6463     if (evaluate)
6464     {
6465 	rettv->v_type = VAR_DICT;
6466 	rettv->vval.v_dict = d;
6467 	++d->dv_refcount;
6468     }
6469 
6470     return OK;
6471 }
6472 
6473 /*
6474  * Return a string with the string representation of a variable.
6475  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6476  * "numbuf" is used for a number.
6477  * Does not put quotes around strings, as ":echo" displays values.
6478  * May return NULL;
6479  */
6480     static char_u *
6481 echo_string(tv, tofree, numbuf)
6482     typval_T	*tv;
6483     char_u	**tofree;
6484     char_u	*numbuf;
6485 {
6486     static int	recurse = 0;
6487     char_u	*r = NULL;
6488 
6489     if (recurse >= DICT_MAXNEST)
6490     {
6491 	EMSG(_("E724: variable nested too deep for displaying"));
6492 	*tofree = NULL;
6493 	return NULL;
6494     }
6495     ++recurse;
6496 
6497     switch (tv->v_type)
6498     {
6499 	case VAR_FUNC:
6500 	    *tofree = NULL;
6501 	    r = tv->vval.v_string;
6502 	    break;
6503 	case VAR_LIST:
6504 	    *tofree = list2string(tv);
6505 	    r = *tofree;
6506 	    break;
6507 	case VAR_DICT:
6508 	    *tofree = dict2string(tv);
6509 	    r = *tofree;
6510 	    break;
6511 	case VAR_STRING:
6512 	case VAR_NUMBER:
6513 	    *tofree = NULL;
6514 	    r = get_tv_string_buf(tv, numbuf);
6515 	    break;
6516 	default:
6517 	    EMSG2(_(e_intern2), "echo_string()");
6518 	    *tofree = NULL;
6519     }
6520 
6521     --recurse;
6522     return r;
6523 }
6524 
6525 /*
6526  * Return a string with the string representation of a variable.
6527  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6528  * "numbuf" is used for a number.
6529  * Puts quotes around strings, so that they can be parsed back by eval().
6530  * May return NULL;
6531  */
6532     static char_u *
6533 tv2string(tv, tofree, numbuf)
6534     typval_T	*tv;
6535     char_u	**tofree;
6536     char_u	*numbuf;
6537 {
6538     switch (tv->v_type)
6539     {
6540 	case VAR_FUNC:
6541 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6542 	    return *tofree;
6543 	case VAR_STRING:
6544 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6545 	    return *tofree;
6546 	case VAR_NUMBER:
6547 	case VAR_LIST:
6548 	case VAR_DICT:
6549 	    break;
6550 	default:
6551 	    EMSG2(_(e_intern2), "tv2string()");
6552     }
6553     return echo_string(tv, tofree, numbuf);
6554 }
6555 
6556 /*
6557  * Return string "str" in ' quotes, doubling ' characters.
6558  * If "str" is NULL an empty string is assumed.
6559  * If "function" is TRUE make it function('string').
6560  */
6561     static char_u *
6562 string_quote(str, function)
6563     char_u	*str;
6564     int		function;
6565 {
6566     unsigned	len;
6567     char_u	*p, *r, *s;
6568 
6569     len = (function ? 13 : 3);
6570     if (str != NULL)
6571     {
6572 	len += STRLEN(str);
6573 	for (p = str; *p != NUL; mb_ptr_adv(p))
6574 	    if (*p == '\'')
6575 		++len;
6576     }
6577     s = r = alloc(len);
6578     if (r != NULL)
6579     {
6580 	if (function)
6581 	{
6582 	    STRCPY(r, "function('");
6583 	    r += 10;
6584 	}
6585 	else
6586 	    *r++ = '\'';
6587 	if (str != NULL)
6588 	    for (p = str; *p != NUL; )
6589 	    {
6590 		if (*p == '\'')
6591 		    *r++ = '\'';
6592 		MB_COPY_CHAR(p, r);
6593 	    }
6594 	*r++ = '\'';
6595 	if (function)
6596 	    *r++ = ')';
6597 	*r++ = NUL;
6598     }
6599     return s;
6600 }
6601 
6602 /*
6603  * Get the value of an environment variable.
6604  * "arg" is pointing to the '$'.  It is advanced to after the name.
6605  * If the environment variable was not set, silently assume it is empty.
6606  * Always return OK.
6607  */
6608     static int
6609 get_env_tv(arg, rettv, evaluate)
6610     char_u	**arg;
6611     typval_T	*rettv;
6612     int		evaluate;
6613 {
6614     char_u	*string = NULL;
6615     int		len;
6616     int		cc;
6617     char_u	*name;
6618     int		mustfree = FALSE;
6619 
6620     ++*arg;
6621     name = *arg;
6622     len = get_env_len(arg);
6623     if (evaluate)
6624     {
6625 	if (len != 0)
6626 	{
6627 	    cc = name[len];
6628 	    name[len] = NUL;
6629 	    /* first try vim_getenv(), fast for normal environment vars */
6630 	    string = vim_getenv(name, &mustfree);
6631 	    if (string != NULL && *string != NUL)
6632 	    {
6633 		if (!mustfree)
6634 		    string = vim_strsave(string);
6635 	    }
6636 	    else
6637 	    {
6638 		if (mustfree)
6639 		    vim_free(string);
6640 
6641 		/* next try expanding things like $VIM and ${HOME} */
6642 		string = expand_env_save(name - 1);
6643 		if (string != NULL && *string == '$')
6644 		{
6645 		    vim_free(string);
6646 		    string = NULL;
6647 		}
6648 	    }
6649 	    name[len] = cc;
6650 	}
6651 	rettv->v_type = VAR_STRING;
6652 	rettv->vval.v_string = string;
6653     }
6654 
6655     return OK;
6656 }
6657 
6658 /*
6659  * Array with names and number of arguments of all internal functions
6660  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6661  */
6662 static struct fst
6663 {
6664     char	*f_name;	/* function name */
6665     char	f_min_argc;	/* minimal number of arguments */
6666     char	f_max_argc;	/* maximal number of arguments */
6667     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6668 				/* implemenation of function */
6669 } functions[] =
6670 {
6671     {"add",		2, 2, f_add},
6672     {"append",		2, 2, f_append},
6673     {"argc",		0, 0, f_argc},
6674     {"argidx",		0, 0, f_argidx},
6675     {"argv",		1, 1, f_argv},
6676     {"browse",		4, 4, f_browse},
6677     {"browsedir",	2, 2, f_browsedir},
6678     {"bufexists",	1, 1, f_bufexists},
6679     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6680     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6681     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6682     {"buflisted",	1, 1, f_buflisted},
6683     {"bufloaded",	1, 1, f_bufloaded},
6684     {"bufname",		1, 1, f_bufname},
6685     {"bufnr",		1, 1, f_bufnr},
6686     {"bufwinnr",	1, 1, f_bufwinnr},
6687     {"byte2line",	1, 1, f_byte2line},
6688     {"byteidx",		2, 2, f_byteidx},
6689     {"call",		2, 3, f_call},
6690     {"char2nr",		1, 1, f_char2nr},
6691     {"cindent",		1, 1, f_cindent},
6692     {"col",		1, 1, f_col},
6693     {"confirm",		1, 4, f_confirm},
6694     {"copy",		1, 1, f_copy},
6695     {"count",		2, 4, f_count},
6696     {"cscope_connection",0,3, f_cscope_connection},
6697     {"cursor",		2, 2, f_cursor},
6698     {"deepcopy",	1, 2, f_deepcopy},
6699     {"delete",		1, 1, f_delete},
6700     {"did_filetype",	0, 0, f_did_filetype},
6701     {"diff_filler",	1, 1, f_diff_filler},
6702     {"diff_hlID",	2, 2, f_diff_hlID},
6703     {"empty",		1, 1, f_empty},
6704     {"escape",		2, 2, f_escape},
6705     {"eval",		1, 1, f_eval},
6706     {"eventhandler",	0, 0, f_eventhandler},
6707     {"executable",	1, 1, f_executable},
6708     {"exists",		1, 1, f_exists},
6709     {"expand",		1, 2, f_expand},
6710     {"extend",		2, 3, f_extend},
6711     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6712     {"filereadable",	1, 1, f_filereadable},
6713     {"filewritable",	1, 1, f_filewritable},
6714     {"filter",		2, 2, f_filter},
6715     {"finddir",		1, 3, f_finddir},
6716     {"findfile",	1, 3, f_findfile},
6717     {"fnamemodify",	2, 2, f_fnamemodify},
6718     {"foldclosed",	1, 1, f_foldclosed},
6719     {"foldclosedend",	1, 1, f_foldclosedend},
6720     {"foldlevel",	1, 1, f_foldlevel},
6721     {"foldtext",	0, 0, f_foldtext},
6722     {"foldtextresult",	1, 1, f_foldtextresult},
6723     {"foreground",	0, 0, f_foreground},
6724     {"function",	1, 1, f_function},
6725     {"garbagecollect",	0, 0, f_garbagecollect},
6726     {"get",		2, 3, f_get},
6727     {"getbufline",	2, 3, f_getbufline},
6728     {"getbufvar",	2, 2, f_getbufvar},
6729     {"getchar",		0, 1, f_getchar},
6730     {"getcharmod",	0, 0, f_getcharmod},
6731     {"getcmdline",	0, 0, f_getcmdline},
6732     {"getcmdpos",	0, 0, f_getcmdpos},
6733     {"getcwd",		0, 0, f_getcwd},
6734     {"getfontname",	0, 1, f_getfontname},
6735     {"getfperm",	1, 1, f_getfperm},
6736     {"getfsize",	1, 1, f_getfsize},
6737     {"getftime",	1, 1, f_getftime},
6738     {"getftype",	1, 1, f_getftype},
6739     {"getline",		1, 2, f_getline},
6740     {"getqflist",	0, 0, f_getqflist},
6741     {"getreg",		0, 2, f_getreg},
6742     {"getregtype",	0, 1, f_getregtype},
6743     {"getwinposx",	0, 0, f_getwinposx},
6744     {"getwinposy",	0, 0, f_getwinposy},
6745     {"getwinvar",	2, 2, f_getwinvar},
6746     {"glob",		1, 1, f_glob},
6747     {"globpath",	2, 2, f_globpath},
6748     {"has",		1, 1, f_has},
6749     {"has_key",		2, 2, f_has_key},
6750     {"hasmapto",	1, 2, f_hasmapto},
6751     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6752     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6753     {"histadd",		2, 2, f_histadd},
6754     {"histdel",		1, 2, f_histdel},
6755     {"histget",		1, 2, f_histget},
6756     {"histnr",		1, 1, f_histnr},
6757     {"hlID",		1, 1, f_hlID},
6758     {"hlexists",	1, 1, f_hlexists},
6759     {"hostname",	0, 0, f_hostname},
6760     {"iconv",		3, 3, f_iconv},
6761     {"indent",		1, 1, f_indent},
6762     {"index",		2, 4, f_index},
6763     {"input",		1, 2, f_input},
6764     {"inputdialog",	1, 3, f_inputdialog},
6765     {"inputrestore",	0, 0, f_inputrestore},
6766     {"inputsave",	0, 0, f_inputsave},
6767     {"inputsecret",	1, 2, f_inputsecret},
6768     {"insert",		2, 3, f_insert},
6769     {"isdirectory",	1, 1, f_isdirectory},
6770     {"islocked",	1, 1, f_islocked},
6771     {"items",		1, 1, f_items},
6772     {"join",		1, 2, f_join},
6773     {"keys",		1, 1, f_keys},
6774     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6775     {"len",		1, 1, f_len},
6776     {"libcall",		3, 3, f_libcall},
6777     {"libcallnr",	3, 3, f_libcallnr},
6778     {"line",		1, 1, f_line},
6779     {"line2byte",	1, 1, f_line2byte},
6780     {"lispindent",	1, 1, f_lispindent},
6781     {"localtime",	0, 0, f_localtime},
6782     {"map",		2, 2, f_map},
6783     {"maparg",		1, 2, f_maparg},
6784     {"mapcheck",	1, 2, f_mapcheck},
6785     {"match",		2, 4, f_match},
6786     {"matchend",	2, 4, f_matchend},
6787     {"matchlist",	2, 4, f_matchlist},
6788     {"matchstr",	2, 4, f_matchstr},
6789     {"max",		1, 1, f_max},
6790     {"min",		1, 1, f_min},
6791 #ifdef vim_mkdir
6792     {"mkdir",		1, 3, f_mkdir},
6793 #endif
6794     {"mode",		0, 0, f_mode},
6795     {"nextnonblank",	1, 1, f_nextnonblank},
6796     {"nr2char",		1, 1, f_nr2char},
6797     {"prevnonblank",	1, 1, f_prevnonblank},
6798     {"printf",		2, 19, f_printf},
6799     {"range",		1, 3, f_range},
6800     {"readfile",	1, 3, f_readfile},
6801     {"remote_expr",	2, 3, f_remote_expr},
6802     {"remote_foreground", 1, 1, f_remote_foreground},
6803     {"remote_peek",	1, 2, f_remote_peek},
6804     {"remote_read",	1, 1, f_remote_read},
6805     {"remote_send",	2, 3, f_remote_send},
6806     {"remove",		2, 3, f_remove},
6807     {"rename",		2, 2, f_rename},
6808     {"repeat",		2, 2, f_repeat},
6809     {"resolve",		1, 1, f_resolve},
6810     {"reverse",		1, 1, f_reverse},
6811     {"search",		1, 2, f_search},
6812     {"searchpair",	3, 5, f_searchpair},
6813     {"server2client",	2, 2, f_server2client},
6814     {"serverlist",	0, 0, f_serverlist},
6815     {"setbufvar",	3, 3, f_setbufvar},
6816     {"setcmdpos",	1, 1, f_setcmdpos},
6817     {"setline",		2, 2, f_setline},
6818     {"setqflist",	1, 2, f_setqflist},
6819     {"setreg",		2, 3, f_setreg},
6820     {"setwinvar",	3, 3, f_setwinvar},
6821     {"simplify",	1, 1, f_simplify},
6822     {"sort",		1, 2, f_sort},
6823     {"soundfold",	1, 1, f_soundfold},
6824     {"spellbadword",	0, 0, f_spellbadword},
6825     {"spellsuggest",	1, 2, f_spellsuggest},
6826     {"split",		1, 3, f_split},
6827 #ifdef HAVE_STRFTIME
6828     {"strftime",	1, 2, f_strftime},
6829 #endif
6830     {"stridx",		2, 3, f_stridx},
6831     {"string",		1, 1, f_string},
6832     {"strlen",		1, 1, f_strlen},
6833     {"strpart",		2, 3, f_strpart},
6834     {"strridx",		2, 3, f_strridx},
6835     {"strtrans",	1, 1, f_strtrans},
6836     {"submatch",	1, 1, f_submatch},
6837     {"substitute",	4, 4, f_substitute},
6838     {"synID",		3, 3, f_synID},
6839     {"synIDattr",	2, 3, f_synIDattr},
6840     {"synIDtrans",	1, 1, f_synIDtrans},
6841     {"system",		1, 2, f_system},
6842     {"taglist",		1, 1, f_taglist},
6843     {"tempname",	0, 0, f_tempname},
6844     {"tolower",		1, 1, f_tolower},
6845     {"toupper",		1, 1, f_toupper},
6846     {"tr",		3, 3, f_tr},
6847     {"type",		1, 1, f_type},
6848     {"values",		1, 1, f_values},
6849     {"virtcol",		1, 1, f_virtcol},
6850     {"visualmode",	0, 1, f_visualmode},
6851     {"winbufnr",	1, 1, f_winbufnr},
6852     {"wincol",		0, 0, f_wincol},
6853     {"winheight",	1, 1, f_winheight},
6854     {"winline",		0, 0, f_winline},
6855     {"winnr",		0, 1, f_winnr},
6856     {"winrestcmd",	0, 0, f_winrestcmd},
6857     {"winwidth",	1, 1, f_winwidth},
6858     {"writefile",	2, 3, f_writefile},
6859 };
6860 
6861 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
6862 
6863 /*
6864  * Function given to ExpandGeneric() to obtain the list of internal
6865  * or user defined function names.
6866  */
6867     char_u *
6868 get_function_name(xp, idx)
6869     expand_T	*xp;
6870     int		idx;
6871 {
6872     static int	intidx = -1;
6873     char_u	*name;
6874 
6875     if (idx == 0)
6876 	intidx = -1;
6877     if (intidx < 0)
6878     {
6879 	name = get_user_func_name(xp, idx);
6880 	if (name != NULL)
6881 	    return name;
6882     }
6883     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
6884     {
6885 	STRCPY(IObuff, functions[intidx].f_name);
6886 	STRCAT(IObuff, "(");
6887 	if (functions[intidx].f_max_argc == 0)
6888 	    STRCAT(IObuff, ")");
6889 	return IObuff;
6890     }
6891 
6892     return NULL;
6893 }
6894 
6895 /*
6896  * Function given to ExpandGeneric() to obtain the list of internal or
6897  * user defined variable or function names.
6898  */
6899 /*ARGSUSED*/
6900     char_u *
6901 get_expr_name(xp, idx)
6902     expand_T	*xp;
6903     int		idx;
6904 {
6905     static int	intidx = -1;
6906     char_u	*name;
6907 
6908     if (idx == 0)
6909 	intidx = -1;
6910     if (intidx < 0)
6911     {
6912 	name = get_function_name(xp, idx);
6913 	if (name != NULL)
6914 	    return name;
6915     }
6916     return get_user_var_name(xp, ++intidx);
6917 }
6918 
6919 #endif /* FEAT_CMDL_COMPL */
6920 
6921 /*
6922  * Find internal function in table above.
6923  * Return index, or -1 if not found
6924  */
6925     static int
6926 find_internal_func(name)
6927     char_u	*name;		/* name of the function */
6928 {
6929     int		first = 0;
6930     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
6931     int		cmp;
6932     int		x;
6933 
6934     /*
6935      * Find the function name in the table. Binary search.
6936      */
6937     while (first <= last)
6938     {
6939 	x = first + ((unsigned)(last - first) >> 1);
6940 	cmp = STRCMP(name, functions[x].f_name);
6941 	if (cmp < 0)
6942 	    last = x - 1;
6943 	else if (cmp > 0)
6944 	    first = x + 1;
6945 	else
6946 	    return x;
6947     }
6948     return -1;
6949 }
6950 
6951 /*
6952  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
6953  * name it contains, otherwise return "name".
6954  */
6955     static char_u *
6956 deref_func_name(name, lenp)
6957     char_u	*name;
6958     int		*lenp;
6959 {
6960     dictitem_T	*v;
6961     int		cc;
6962 
6963     cc = name[*lenp];
6964     name[*lenp] = NUL;
6965     v = find_var(name, NULL);
6966     name[*lenp] = cc;
6967     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
6968     {
6969 	if (v->di_tv.vval.v_string == NULL)
6970 	{
6971 	    *lenp = 0;
6972 	    return (char_u *)"";	/* just in case */
6973 	}
6974 	*lenp = STRLEN(v->di_tv.vval.v_string);
6975 	return v->di_tv.vval.v_string;
6976     }
6977 
6978     return name;
6979 }
6980 
6981 /*
6982  * Allocate a variable for the result of a function.
6983  * Return OK or FAIL.
6984  */
6985     static int
6986 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
6987 							   evaluate, selfdict)
6988     char_u	*name;		/* name of the function */
6989     int		len;		/* length of "name" */
6990     typval_T	*rettv;
6991     char_u	**arg;		/* argument, pointing to the '(' */
6992     linenr_T	firstline;	/* first line of range */
6993     linenr_T	lastline;	/* last line of range */
6994     int		*doesrange;	/* return: function handled range */
6995     int		evaluate;
6996     dict_T	*selfdict;	/* Dictionary for "self" */
6997 {
6998     char_u	*argp;
6999     int		ret = OK;
7000     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7001     int		argcount = 0;		/* number of arguments found */
7002 
7003     /*
7004      * Get the arguments.
7005      */
7006     argp = *arg;
7007     while (argcount < MAX_FUNC_ARGS)
7008     {
7009 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7010 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7011 	    break;
7012 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7013 	{
7014 	    ret = FAIL;
7015 	    break;
7016 	}
7017 	++argcount;
7018 	if (*argp != ',')
7019 	    break;
7020     }
7021     if (*argp == ')')
7022 	++argp;
7023     else
7024 	ret = FAIL;
7025 
7026     if (ret == OK)
7027 	ret = call_func(name, len, rettv, argcount, argvars,
7028 			  firstline, lastline, doesrange, evaluate, selfdict);
7029     else if (!aborting())
7030     {
7031 	if (argcount == MAX_FUNC_ARGS)
7032 	    emsg_funcname("E740: Too many arguments for function %s", name);
7033 	else
7034 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7035     }
7036 
7037     while (--argcount >= 0)
7038 	clear_tv(&argvars[argcount]);
7039 
7040     *arg = skipwhite(argp);
7041     return ret;
7042 }
7043 
7044 
7045 /*
7046  * Call a function with its resolved parameters
7047  * Return OK or FAIL.
7048  */
7049     static int
7050 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7051 						doesrange, evaluate, selfdict)
7052     char_u	*name;		/* name of the function */
7053     int		len;		/* length of "name" */
7054     typval_T	*rettv;		/* return value goes here */
7055     int		argcount;	/* number of "argvars" */
7056     typval_T	*argvars;	/* vars for arguments */
7057     linenr_T	firstline;	/* first line of range */
7058     linenr_T	lastline;	/* last line of range */
7059     int		*doesrange;	/* return: function handled range */
7060     int		evaluate;
7061     dict_T	*selfdict;	/* Dictionary for "self" */
7062 {
7063     int		ret = FAIL;
7064 #define ERROR_UNKNOWN	0
7065 #define ERROR_TOOMANY	1
7066 #define ERROR_TOOFEW	2
7067 #define ERROR_SCRIPT	3
7068 #define ERROR_DICT	4
7069 #define ERROR_NONE	5
7070 #define ERROR_OTHER	6
7071     int		error = ERROR_NONE;
7072     int		i;
7073     int		llen;
7074     ufunc_T	*fp;
7075     int		cc;
7076 #define FLEN_FIXED 40
7077     char_u	fname_buf[FLEN_FIXED + 1];
7078     char_u	*fname;
7079 
7080     /*
7081      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7082      * Change <SNR>123_name() to K_SNR 123_name().
7083      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7084      */
7085     cc = name[len];
7086     name[len] = NUL;
7087     llen = eval_fname_script(name);
7088     if (llen > 0)
7089     {
7090 	fname_buf[0] = K_SPECIAL;
7091 	fname_buf[1] = KS_EXTRA;
7092 	fname_buf[2] = (int)KE_SNR;
7093 	i = 3;
7094 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7095 	{
7096 	    if (current_SID <= 0)
7097 		error = ERROR_SCRIPT;
7098 	    else
7099 	    {
7100 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7101 		i = (int)STRLEN(fname_buf);
7102 	    }
7103 	}
7104 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7105 	{
7106 	    STRCPY(fname_buf + i, name + llen);
7107 	    fname = fname_buf;
7108 	}
7109 	else
7110 	{
7111 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7112 	    if (fname == NULL)
7113 		error = ERROR_OTHER;
7114 	    else
7115 	    {
7116 		mch_memmove(fname, fname_buf, (size_t)i);
7117 		STRCPY(fname + i, name + llen);
7118 	    }
7119 	}
7120     }
7121     else
7122 	fname = name;
7123 
7124     *doesrange = FALSE;
7125 
7126 
7127     /* execute the function if no errors detected and executing */
7128     if (evaluate && error == ERROR_NONE)
7129     {
7130 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7131 	error = ERROR_UNKNOWN;
7132 
7133 	if (!builtin_function(fname))
7134 	{
7135 	    /*
7136 	     * User defined function.
7137 	     */
7138 	    fp = find_func(fname);
7139 
7140 #ifdef FEAT_AUTOCMD
7141 	    /* Trigger FuncUndefined event, may load the function. */
7142 	    if (fp == NULL
7143 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7144 						     fname, fname, TRUE, NULL)
7145 		    && !aborting())
7146 	    {
7147 		/* executed an autocommand, search for the function again */
7148 		fp = find_func(fname);
7149 	    }
7150 #endif
7151 	    /* Try loading a package. */
7152 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7153 	    {
7154 		/* loaded a package, search for the function again */
7155 		fp = find_func(fname);
7156 	    }
7157 
7158 	    if (fp != NULL)
7159 	    {
7160 		if (fp->uf_flags & FC_RANGE)
7161 		    *doesrange = TRUE;
7162 		if (argcount < fp->uf_args.ga_len)
7163 		    error = ERROR_TOOFEW;
7164 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7165 		    error = ERROR_TOOMANY;
7166 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7167 		    error = ERROR_DICT;
7168 		else
7169 		{
7170 		    /*
7171 		     * Call the user function.
7172 		     * Save and restore search patterns, script variables and
7173 		     * redo buffer.
7174 		     */
7175 		    save_search_patterns();
7176 		    saveRedobuff();
7177 		    ++fp->uf_calls;
7178 		    call_user_func(fp, argcount, argvars, rettv,
7179 					       firstline, lastline,
7180 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7181 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7182 						      && fp->uf_refcount <= 0)
7183 			/* Function was unreferenced while being used, free it
7184 			 * now. */
7185 			func_free(fp);
7186 		    restoreRedobuff();
7187 		    restore_search_patterns();
7188 		    error = ERROR_NONE;
7189 		}
7190 	    }
7191 	}
7192 	else
7193 	{
7194 	    /*
7195 	     * Find the function name in the table, call its implementation.
7196 	     */
7197 	    i = find_internal_func(fname);
7198 	    if (i >= 0)
7199 	    {
7200 		if (argcount < functions[i].f_min_argc)
7201 		    error = ERROR_TOOFEW;
7202 		else if (argcount > functions[i].f_max_argc)
7203 		    error = ERROR_TOOMANY;
7204 		else
7205 		{
7206 		    argvars[argcount].v_type = VAR_UNKNOWN;
7207 		    functions[i].f_func(argvars, rettv);
7208 		    error = ERROR_NONE;
7209 		}
7210 	    }
7211 	}
7212 	/*
7213 	 * The function call (or "FuncUndefined" autocommand sequence) might
7214 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7215 	 * exception that has not been caught so far.  This situation can be
7216 	 * tested for by calling aborting().  For an error in an internal
7217 	 * function or for the "E132" error in call_user_func(), however, the
7218 	 * throw point at which the "force_abort" flag (temporarily reset by
7219 	 * emsg()) is normally updated has not been reached yet. We need to
7220 	 * update that flag first to make aborting() reliable.
7221 	 */
7222 	update_force_abort();
7223     }
7224     if (error == ERROR_NONE)
7225 	ret = OK;
7226 
7227     /*
7228      * Report an error unless the argument evaluation or function call has been
7229      * cancelled due to an aborting error, an interrupt, or an exception.
7230      */
7231     if (!aborting())
7232     {
7233 	switch (error)
7234 	{
7235 	    case ERROR_UNKNOWN:
7236 		    emsg_funcname("E117: Unknown function: %s", name);
7237 		    break;
7238 	    case ERROR_TOOMANY:
7239 		    emsg_funcname(e_toomanyarg, name);
7240 		    break;
7241 	    case ERROR_TOOFEW:
7242 		    emsg_funcname("E119: Not enough arguments for function: %s",
7243 									name);
7244 		    break;
7245 	    case ERROR_SCRIPT:
7246 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7247 									name);
7248 		    break;
7249 	    case ERROR_DICT:
7250 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7251 									name);
7252 		    break;
7253 	}
7254     }
7255 
7256     name[len] = cc;
7257     if (fname != name && fname != fname_buf)
7258 	vim_free(fname);
7259 
7260     return ret;
7261 }
7262 
7263 /*
7264  * Give an error message with a function name.  Handle <SNR> things.
7265  */
7266     static void
7267 emsg_funcname(msg, name)
7268     char	*msg;
7269     char_u	*name;
7270 {
7271     char_u	*p;
7272 
7273     if (*name == K_SPECIAL)
7274 	p = concat_str((char_u *)"<SNR>", name + 3);
7275     else
7276 	p = name;
7277     EMSG2(_(msg), p);
7278     if (p != name)
7279 	vim_free(p);
7280 }
7281 
7282 /*********************************************
7283  * Implementation of the built-in functions
7284  */
7285 
7286 /*
7287  * "add(list, item)" function
7288  */
7289     static void
7290 f_add(argvars, rettv)
7291     typval_T	*argvars;
7292     typval_T	*rettv;
7293 {
7294     list_T	*l;
7295 
7296     rettv->vval.v_number = 1; /* Default: Failed */
7297     if (argvars[0].v_type == VAR_LIST)
7298     {
7299 	if ((l = argvars[0].vval.v_list) != NULL
7300 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7301 		&& list_append_tv(l, &argvars[1]) == OK)
7302 	    copy_tv(&argvars[0], rettv);
7303     }
7304     else
7305 	EMSG(_(e_listreq));
7306 }
7307 
7308 /*
7309  * "append(lnum, string/list)" function
7310  */
7311     static void
7312 f_append(argvars, rettv)
7313     typval_T	*argvars;
7314     typval_T	*rettv;
7315 {
7316     long	lnum;
7317     char_u	*line;
7318     list_T	*l = NULL;
7319     listitem_T	*li = NULL;
7320     typval_T	*tv;
7321     long	added = 0;
7322 
7323     lnum = get_tv_lnum(argvars);
7324     if (lnum >= 0
7325 	    && lnum <= curbuf->b_ml.ml_line_count
7326 	    && u_save(lnum, lnum + 1) == OK)
7327     {
7328 	if (argvars[1].v_type == VAR_LIST)
7329 	{
7330 	    l = argvars[1].vval.v_list;
7331 	    if (l == NULL)
7332 		return;
7333 	    li = l->lv_first;
7334 	}
7335 	rettv->vval.v_number = 0;	/* Default: Success */
7336 	for (;;)
7337 	{
7338 	    if (l == NULL)
7339 		tv = &argvars[1];	/* append a string */
7340 	    else if (li == NULL)
7341 		break;			/* end of list */
7342 	    else
7343 		tv = &li->li_tv;	/* append item from list */
7344 	    line = get_tv_string_chk(tv);
7345 	    if (line == NULL)		/* type error */
7346 	    {
7347 		rettv->vval.v_number = 1;	/* Failed */
7348 		break;
7349 	    }
7350 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7351 	    ++added;
7352 	    if (l == NULL)
7353 		break;
7354 	    li = li->li_next;
7355 	}
7356 
7357 	appended_lines_mark(lnum, added);
7358 	if (curwin->w_cursor.lnum > lnum)
7359 	    curwin->w_cursor.lnum += added;
7360     }
7361     else
7362 	rettv->vval.v_number = 1;	/* Failed */
7363 }
7364 
7365 /*
7366  * "argc()" function
7367  */
7368 /* ARGSUSED */
7369     static void
7370 f_argc(argvars, rettv)
7371     typval_T	*argvars;
7372     typval_T	*rettv;
7373 {
7374     rettv->vval.v_number = ARGCOUNT;
7375 }
7376 
7377 /*
7378  * "argidx()" function
7379  */
7380 /* ARGSUSED */
7381     static void
7382 f_argidx(argvars, rettv)
7383     typval_T	*argvars;
7384     typval_T	*rettv;
7385 {
7386     rettv->vval.v_number = curwin->w_arg_idx;
7387 }
7388 
7389 /*
7390  * "argv(nr)" function
7391  */
7392     static void
7393 f_argv(argvars, rettv)
7394     typval_T	*argvars;
7395     typval_T	*rettv;
7396 {
7397     int		idx;
7398 
7399     idx = get_tv_number_chk(&argvars[0], NULL);
7400     if (idx >= 0 && idx < ARGCOUNT)
7401 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7402     else
7403 	rettv->vval.v_string = NULL;
7404     rettv->v_type = VAR_STRING;
7405 }
7406 
7407 /*
7408  * "browse(save, title, initdir, default)" function
7409  */
7410 /* ARGSUSED */
7411     static void
7412 f_browse(argvars, rettv)
7413     typval_T	*argvars;
7414     typval_T	*rettv;
7415 {
7416 #ifdef FEAT_BROWSE
7417     int		save;
7418     char_u	*title;
7419     char_u	*initdir;
7420     char_u	*defname;
7421     char_u	buf[NUMBUFLEN];
7422     char_u	buf2[NUMBUFLEN];
7423     int		error = FALSE;
7424 
7425     save = get_tv_number_chk(&argvars[0], &error);
7426     title = get_tv_string_chk(&argvars[1]);
7427     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7428     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7429 
7430     if (error || title == NULL || initdir == NULL || defname == NULL)
7431 	rettv->vval.v_string = NULL;
7432     else
7433 	rettv->vval.v_string =
7434 		 do_browse(save ? BROWSE_SAVE : 0,
7435 				 title, defname, NULL, initdir, NULL, curbuf);
7436 #else
7437     rettv->vval.v_string = NULL;
7438 #endif
7439     rettv->v_type = VAR_STRING;
7440 }
7441 
7442 /*
7443  * "browsedir(title, initdir)" function
7444  */
7445 /* ARGSUSED */
7446     static void
7447 f_browsedir(argvars, rettv)
7448     typval_T	*argvars;
7449     typval_T	*rettv;
7450 {
7451 #ifdef FEAT_BROWSE
7452     char_u	*title;
7453     char_u	*initdir;
7454     char_u	buf[NUMBUFLEN];
7455 
7456     title = get_tv_string_chk(&argvars[0]);
7457     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7458 
7459     if (title == NULL || initdir == NULL)
7460 	rettv->vval.v_string = NULL;
7461     else
7462 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7463 				    title, NULL, NULL, initdir, NULL, curbuf);
7464 #else
7465     rettv->vval.v_string = NULL;
7466 #endif
7467     rettv->v_type = VAR_STRING;
7468 }
7469 
7470 static buf_T *find_buffer __ARGS((typval_T *avar));
7471 
7472 /*
7473  * Find a buffer by number or exact name.
7474  */
7475     static buf_T *
7476 find_buffer(avar)
7477     typval_T	*avar;
7478 {
7479     buf_T	*buf = NULL;
7480 
7481     if (avar->v_type == VAR_NUMBER)
7482 	buf = buflist_findnr((int)avar->vval.v_number);
7483     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7484     {
7485 	buf = buflist_findname_exp(avar->vval.v_string);
7486 	if (buf == NULL)
7487 	{
7488 	    /* No full path name match, try a match with a URL or a "nofile"
7489 	     * buffer, these don't use the full path. */
7490 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7491 		if (buf->b_fname != NULL
7492 			&& (path_with_url(buf->b_fname)
7493 #ifdef FEAT_QUICKFIX
7494 			    || bt_nofile(buf)
7495 #endif
7496 			   )
7497 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7498 		    break;
7499 	}
7500     }
7501     return buf;
7502 }
7503 
7504 /*
7505  * "bufexists(expr)" function
7506  */
7507     static void
7508 f_bufexists(argvars, rettv)
7509     typval_T	*argvars;
7510     typval_T	*rettv;
7511 {
7512     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7513 }
7514 
7515 /*
7516  * "buflisted(expr)" function
7517  */
7518     static void
7519 f_buflisted(argvars, rettv)
7520     typval_T	*argvars;
7521     typval_T	*rettv;
7522 {
7523     buf_T	*buf;
7524 
7525     buf = find_buffer(&argvars[0]);
7526     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7527 }
7528 
7529 /*
7530  * "bufloaded(expr)" function
7531  */
7532     static void
7533 f_bufloaded(argvars, rettv)
7534     typval_T	*argvars;
7535     typval_T	*rettv;
7536 {
7537     buf_T	*buf;
7538 
7539     buf = find_buffer(&argvars[0]);
7540     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7541 }
7542 
7543 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7544 
7545 /*
7546  * Get buffer by number or pattern.
7547  */
7548     static buf_T *
7549 get_buf_tv(tv)
7550     typval_T	*tv;
7551 {
7552     char_u	*name = tv->vval.v_string;
7553     int		save_magic;
7554     char_u	*save_cpo;
7555     buf_T	*buf;
7556 
7557     if (tv->v_type == VAR_NUMBER)
7558 	return buflist_findnr((int)tv->vval.v_number);
7559     if (tv->v_type != VAR_STRING)
7560 	return NULL;
7561     if (name == NULL || *name == NUL)
7562 	return curbuf;
7563     if (name[0] == '$' && name[1] == NUL)
7564 	return lastbuf;
7565 
7566     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7567     save_magic = p_magic;
7568     p_magic = TRUE;
7569     save_cpo = p_cpo;
7570     p_cpo = (char_u *)"";
7571 
7572     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7573 								TRUE, FALSE));
7574 
7575     p_magic = save_magic;
7576     p_cpo = save_cpo;
7577 
7578     /* If not found, try expanding the name, like done for bufexists(). */
7579     if (buf == NULL)
7580 	buf = find_buffer(tv);
7581 
7582     return buf;
7583 }
7584 
7585 /*
7586  * "bufname(expr)" function
7587  */
7588     static void
7589 f_bufname(argvars, rettv)
7590     typval_T	*argvars;
7591     typval_T	*rettv;
7592 {
7593     buf_T	*buf;
7594 
7595     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7596     ++emsg_off;
7597     buf = get_buf_tv(&argvars[0]);
7598     rettv->v_type = VAR_STRING;
7599     if (buf != NULL && buf->b_fname != NULL)
7600 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7601     else
7602 	rettv->vval.v_string = NULL;
7603     --emsg_off;
7604 }
7605 
7606 /*
7607  * "bufnr(expr)" function
7608  */
7609     static void
7610 f_bufnr(argvars, rettv)
7611     typval_T	*argvars;
7612     typval_T	*rettv;
7613 {
7614     buf_T	*buf;
7615 
7616     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7617     ++emsg_off;
7618     buf = get_buf_tv(&argvars[0]);
7619     if (buf != NULL)
7620 	rettv->vval.v_number = buf->b_fnum;
7621     else
7622 	rettv->vval.v_number = -1;
7623     --emsg_off;
7624 }
7625 
7626 /*
7627  * "bufwinnr(nr)" function
7628  */
7629     static void
7630 f_bufwinnr(argvars, rettv)
7631     typval_T	*argvars;
7632     typval_T	*rettv;
7633 {
7634 #ifdef FEAT_WINDOWS
7635     win_T	*wp;
7636     int		winnr = 0;
7637 #endif
7638     buf_T	*buf;
7639 
7640     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7641     ++emsg_off;
7642     buf = get_buf_tv(&argvars[0]);
7643 #ifdef FEAT_WINDOWS
7644     for (wp = firstwin; wp; wp = wp->w_next)
7645     {
7646 	++winnr;
7647 	if (wp->w_buffer == buf)
7648 	    break;
7649     }
7650     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7651 #else
7652     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7653 #endif
7654     --emsg_off;
7655 }
7656 
7657 /*
7658  * "byte2line(byte)" function
7659  */
7660 /*ARGSUSED*/
7661     static void
7662 f_byte2line(argvars, rettv)
7663     typval_T	*argvars;
7664     typval_T	*rettv;
7665 {
7666 #ifndef FEAT_BYTEOFF
7667     rettv->vval.v_number = -1;
7668 #else
7669     long	boff = 0;
7670 
7671     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7672     if (boff < 0)
7673 	rettv->vval.v_number = -1;
7674     else
7675 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7676 							  (linenr_T)0, &boff);
7677 #endif
7678 }
7679 
7680 /*
7681  * "byteidx()" function
7682  */
7683 /*ARGSUSED*/
7684     static void
7685 f_byteidx(argvars, rettv)
7686     typval_T	*argvars;
7687     typval_T	*rettv;
7688 {
7689 #ifdef FEAT_MBYTE
7690     char_u	*t;
7691 #endif
7692     char_u	*str;
7693     long	idx;
7694 
7695     str = get_tv_string_chk(&argvars[0]);
7696     idx = get_tv_number_chk(&argvars[1], NULL);
7697     rettv->vval.v_number = -1;
7698     if (str == NULL || idx < 0)
7699 	return;
7700 
7701 #ifdef FEAT_MBYTE
7702     t = str;
7703     for ( ; idx > 0; idx--)
7704     {
7705 	if (*t == NUL)		/* EOL reached */
7706 	    return;
7707 	t += mb_ptr2len_check(t);
7708     }
7709     rettv->vval.v_number = t - str;
7710 #else
7711     if (idx <= STRLEN(str))
7712 	rettv->vval.v_number = idx;
7713 #endif
7714 }
7715 
7716 /*
7717  * "call(func, arglist)" function
7718  */
7719     static void
7720 f_call(argvars, rettv)
7721     typval_T	*argvars;
7722     typval_T	*rettv;
7723 {
7724     char_u	*func;
7725     typval_T	argv[MAX_FUNC_ARGS];
7726     int		argc = 0;
7727     listitem_T	*item;
7728     int		dummy;
7729     dict_T	*selfdict = NULL;
7730 
7731     rettv->vval.v_number = 0;
7732     if (argvars[1].v_type != VAR_LIST)
7733     {
7734 	EMSG(_(e_listreq));
7735 	return;
7736     }
7737     if (argvars[1].vval.v_list == NULL)
7738 	return;
7739 
7740     if (argvars[0].v_type == VAR_FUNC)
7741 	func = argvars[0].vval.v_string;
7742     else
7743 	func = get_tv_string(&argvars[0]);
7744     if (*func == NUL)
7745 	return;		/* type error or empty name */
7746 
7747     if (argvars[2].v_type != VAR_UNKNOWN)
7748     {
7749 	if (argvars[2].v_type != VAR_DICT)
7750 	{
7751 	    EMSG(_(e_dictreq));
7752 	    return;
7753 	}
7754 	selfdict = argvars[2].vval.v_dict;
7755     }
7756 
7757     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7758 							 item = item->li_next)
7759     {
7760 	if (argc == MAX_FUNC_ARGS)
7761 	{
7762 	    EMSG(_("E699: Too many arguments"));
7763 	    break;
7764 	}
7765 	/* Make a copy of each argument.  This is needed to be able to set
7766 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7767 	 */
7768 	copy_tv(&item->li_tv, &argv[argc++]);
7769     }
7770 
7771     if (item == NULL)
7772 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
7773 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
7774 						      &dummy, TRUE, selfdict);
7775 
7776     /* Free the arguments. */
7777     while (argc > 0)
7778 	clear_tv(&argv[--argc]);
7779 }
7780 
7781 /*
7782  * "char2nr(string)" function
7783  */
7784     static void
7785 f_char2nr(argvars, rettv)
7786     typval_T	*argvars;
7787     typval_T	*rettv;
7788 {
7789 #ifdef FEAT_MBYTE
7790     if (has_mbyte)
7791 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
7792     else
7793 #endif
7794     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
7795 }
7796 
7797 /*
7798  * "cindent(lnum)" function
7799  */
7800     static void
7801 f_cindent(argvars, rettv)
7802     typval_T	*argvars;
7803     typval_T	*rettv;
7804 {
7805 #ifdef FEAT_CINDENT
7806     pos_T	pos;
7807     linenr_T	lnum;
7808 
7809     pos = curwin->w_cursor;
7810     lnum = get_tv_lnum(argvars);
7811     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
7812     {
7813 	curwin->w_cursor.lnum = lnum;
7814 	rettv->vval.v_number = get_c_indent();
7815 	curwin->w_cursor = pos;
7816     }
7817     else
7818 #endif
7819 	rettv->vval.v_number = -1;
7820 }
7821 
7822 /*
7823  * "col(string)" function
7824  */
7825     static void
7826 f_col(argvars, rettv)
7827     typval_T	*argvars;
7828     typval_T	*rettv;
7829 {
7830     colnr_T	col = 0;
7831     pos_T	*fp;
7832 
7833     fp = var2fpos(&argvars[0], FALSE);
7834     if (fp != NULL)
7835     {
7836 	if (fp->col == MAXCOL)
7837 	{
7838 	    /* '> can be MAXCOL, get the length of the line then */
7839 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
7840 		col = STRLEN(ml_get(fp->lnum)) + 1;
7841 	    else
7842 		col = MAXCOL;
7843 	}
7844 	else
7845 	{
7846 	    col = fp->col + 1;
7847 #ifdef FEAT_VIRTUALEDIT
7848 	    /* col(".") when the cursor is on the NUL at the end of the line
7849 	     * because of "coladd" can be seen as an extra column. */
7850 	    if (virtual_active() && fp == &curwin->w_cursor)
7851 	    {
7852 		char_u	*p = ml_get_cursor();
7853 
7854 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
7855 				 curwin->w_virtcol - curwin->w_cursor.coladd))
7856 		{
7857 # ifdef FEAT_MBYTE
7858 		    int		l;
7859 
7860 		    if (*p != NUL && p[(l = (*mb_ptr2len_check)(p))] == NUL)
7861 			col += l;
7862 # else
7863 		    if (*p != NUL && p[1] == NUL)
7864 			++col;
7865 # endif
7866 		}
7867 	    }
7868 #endif
7869 	}
7870     }
7871     rettv->vval.v_number = col;
7872 }
7873 
7874 /*
7875  * "confirm(message, buttons[, default [, type]])" function
7876  */
7877 /*ARGSUSED*/
7878     static void
7879 f_confirm(argvars, rettv)
7880     typval_T	*argvars;
7881     typval_T	*rettv;
7882 {
7883 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
7884     char_u	*message;
7885     char_u	*buttons = NULL;
7886     char_u	buf[NUMBUFLEN];
7887     char_u	buf2[NUMBUFLEN];
7888     int		def = 1;
7889     int		type = VIM_GENERIC;
7890     char_u	*typestr;
7891     int		error = FALSE;
7892 
7893     message = get_tv_string_chk(&argvars[0]);
7894     if (message == NULL)
7895 	error = TRUE;
7896     if (argvars[1].v_type != VAR_UNKNOWN)
7897     {
7898 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
7899 	if (buttons == NULL)
7900 	    error = TRUE;
7901 	if (argvars[2].v_type != VAR_UNKNOWN)
7902 	{
7903 	    def = get_tv_number_chk(&argvars[2], &error);
7904 	    if (argvars[3].v_type != VAR_UNKNOWN)
7905 	    {
7906 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
7907 		if (typestr == NULL)
7908 		    error = TRUE;
7909 		else
7910 		{
7911 		    switch (TOUPPER_ASC(*typestr))
7912 		    {
7913 			case 'E': type = VIM_ERROR; break;
7914 			case 'Q': type = VIM_QUESTION; break;
7915 			case 'I': type = VIM_INFO; break;
7916 			case 'W': type = VIM_WARNING; break;
7917 			case 'G': type = VIM_GENERIC; break;
7918 		    }
7919 		}
7920 	    }
7921 	}
7922     }
7923 
7924     if (buttons == NULL || *buttons == NUL)
7925 	buttons = (char_u *)_("&Ok");
7926 
7927     if (error)
7928 	rettv->vval.v_number = 0;
7929     else
7930 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
7931 								   def, NULL);
7932 #else
7933     rettv->vval.v_number = 0;
7934 #endif
7935 }
7936 
7937 /*
7938  * "copy()" function
7939  */
7940     static void
7941 f_copy(argvars, rettv)
7942     typval_T	*argvars;
7943     typval_T	*rettv;
7944 {
7945     item_copy(&argvars[0], rettv, FALSE, 0);
7946 }
7947 
7948 /*
7949  * "count()" function
7950  */
7951     static void
7952 f_count(argvars, rettv)
7953     typval_T	*argvars;
7954     typval_T	*rettv;
7955 {
7956     long	n = 0;
7957     int		ic = FALSE;
7958 
7959     if (argvars[0].v_type == VAR_LIST)
7960     {
7961 	listitem_T	*li;
7962 	list_T		*l;
7963 	long		idx;
7964 
7965 	if ((l = argvars[0].vval.v_list) != NULL)
7966 	{
7967 	    li = l->lv_first;
7968 	    if (argvars[2].v_type != VAR_UNKNOWN)
7969 	    {
7970 		int error = FALSE;
7971 
7972 		ic = get_tv_number_chk(&argvars[2], &error);
7973 		if (argvars[3].v_type != VAR_UNKNOWN)
7974 		{
7975 		    idx = get_tv_number_chk(&argvars[3], &error);
7976 		    if (!error)
7977 		    {
7978 			li = list_find(l, idx);
7979 			if (li == NULL)
7980 			    EMSGN(_(e_listidx), idx);
7981 		    }
7982 		}
7983 		if (error)
7984 		    li = NULL;
7985 	    }
7986 
7987 	    for ( ; li != NULL; li = li->li_next)
7988 		if (tv_equal(&li->li_tv, &argvars[1], ic))
7989 		    ++n;
7990 	}
7991     }
7992     else if (argvars[0].v_type == VAR_DICT)
7993     {
7994 	int		todo;
7995 	dict_T		*d;
7996 	hashitem_T	*hi;
7997 
7998 	if ((d = argvars[0].vval.v_dict) != NULL)
7999 	{
8000 	    int error = FALSE;
8001 
8002 	    if (argvars[2].v_type != VAR_UNKNOWN)
8003 	    {
8004 		ic = get_tv_number_chk(&argvars[2], &error);
8005 		if (argvars[3].v_type != VAR_UNKNOWN)
8006 		    EMSG(_(e_invarg));
8007 	    }
8008 
8009 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8010 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8011 	    {
8012 		if (!HASHITEM_EMPTY(hi))
8013 		{
8014 		    --todo;
8015 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8016 			++n;
8017 		}
8018 	    }
8019 	}
8020     }
8021     else
8022 	EMSG2(_(e_listdictarg), "count()");
8023     rettv->vval.v_number = n;
8024 }
8025 
8026 /*
8027  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8028  *
8029  * Checks the existence of a cscope connection.
8030  */
8031 /*ARGSUSED*/
8032     static void
8033 f_cscope_connection(argvars, rettv)
8034     typval_T	*argvars;
8035     typval_T	*rettv;
8036 {
8037 #ifdef FEAT_CSCOPE
8038     int		num = 0;
8039     char_u	*dbpath = NULL;
8040     char_u	*prepend = NULL;
8041     char_u	buf[NUMBUFLEN];
8042 
8043     if (argvars[0].v_type != VAR_UNKNOWN
8044 	    && argvars[1].v_type != VAR_UNKNOWN)
8045     {
8046 	num = (int)get_tv_number(&argvars[0]);
8047 	dbpath = get_tv_string(&argvars[1]);
8048 	if (argvars[2].v_type != VAR_UNKNOWN)
8049 	    prepend = get_tv_string_buf(&argvars[2], buf);
8050     }
8051 
8052     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8053 #else
8054     rettv->vval.v_number = 0;
8055 #endif
8056 }
8057 
8058 /*
8059  * "cursor(lnum, col)" function
8060  *
8061  * Moves the cursor to the specified line and column
8062  */
8063 /*ARGSUSED*/
8064     static void
8065 f_cursor(argvars, rettv)
8066     typval_T	*argvars;
8067     typval_T	*rettv;
8068 {
8069     long	line, col;
8070 
8071     line = get_tv_lnum(argvars);
8072     col = get_tv_number_chk(&argvars[1], NULL);
8073     if (line < 0 || col < 0)
8074 	return;		/* type error; errmsg already given */
8075     if (line > 0)
8076 	curwin->w_cursor.lnum = line;
8077     if (col > 0)
8078 	curwin->w_cursor.col = col - 1;
8079 #ifdef FEAT_VIRTUALEDIT
8080     curwin->w_cursor.coladd = 0;
8081 #endif
8082 
8083     /* Make sure the cursor is in a valid position. */
8084     check_cursor();
8085 #ifdef FEAT_MBYTE
8086     /* Correct cursor for multi-byte character. */
8087     if (has_mbyte)
8088 	mb_adjust_cursor();
8089 #endif
8090 
8091     curwin->w_set_curswant = TRUE;
8092 }
8093 
8094 /*
8095  * "deepcopy()" function
8096  */
8097     static void
8098 f_deepcopy(argvars, rettv)
8099     typval_T	*argvars;
8100     typval_T	*rettv;
8101 {
8102     int		noref = 0;
8103 
8104     if (argvars[1].v_type != VAR_UNKNOWN)
8105 	noref = get_tv_number_chk(&argvars[1], NULL);
8106     if (noref < 0 || noref > 1)
8107 	EMSG(_(e_invarg));
8108     else
8109 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8110 }
8111 
8112 /*
8113  * "delete()" function
8114  */
8115     static void
8116 f_delete(argvars, rettv)
8117     typval_T	*argvars;
8118     typval_T	*rettv;
8119 {
8120     if (check_restricted() || check_secure())
8121 	rettv->vval.v_number = -1;
8122     else
8123 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8124 }
8125 
8126 /*
8127  * "did_filetype()" function
8128  */
8129 /*ARGSUSED*/
8130     static void
8131 f_did_filetype(argvars, rettv)
8132     typval_T	*argvars;
8133     typval_T	*rettv;
8134 {
8135 #ifdef FEAT_AUTOCMD
8136     rettv->vval.v_number = did_filetype;
8137 #else
8138     rettv->vval.v_number = 0;
8139 #endif
8140 }
8141 
8142 /*
8143  * "diff_filler()" function
8144  */
8145 /*ARGSUSED*/
8146     static void
8147 f_diff_filler(argvars, rettv)
8148     typval_T	*argvars;
8149     typval_T	*rettv;
8150 {
8151 #ifdef FEAT_DIFF
8152     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8153 #endif
8154 }
8155 
8156 /*
8157  * "diff_hlID()" function
8158  */
8159 /*ARGSUSED*/
8160     static void
8161 f_diff_hlID(argvars, rettv)
8162     typval_T	*argvars;
8163     typval_T	*rettv;
8164 {
8165 #ifdef FEAT_DIFF
8166     linenr_T		lnum = get_tv_lnum(argvars);
8167     static linenr_T	prev_lnum = 0;
8168     static int		changedtick = 0;
8169     static int		fnum = 0;
8170     static int		change_start = 0;
8171     static int		change_end = 0;
8172     static enum hlf_value hlID = 0;
8173     int			filler_lines;
8174     int			col;
8175 
8176     if (lnum < 0)	/* ignore type error in {lnum} arg */
8177 	lnum = 0;
8178     if (lnum != prev_lnum
8179 	    || changedtick != curbuf->b_changedtick
8180 	    || fnum != curbuf->b_fnum)
8181     {
8182 	/* New line, buffer, change: need to get the values. */
8183 	filler_lines = diff_check(curwin, lnum);
8184 	if (filler_lines < 0)
8185 	{
8186 	    if (filler_lines == -1)
8187 	    {
8188 		change_start = MAXCOL;
8189 		change_end = -1;
8190 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8191 		    hlID = HLF_ADD;	/* added line */
8192 		else
8193 		    hlID = HLF_CHD;	/* changed line */
8194 	    }
8195 	    else
8196 		hlID = HLF_ADD;	/* added line */
8197 	}
8198 	else
8199 	    hlID = (enum hlf_value)0;
8200 	prev_lnum = lnum;
8201 	changedtick = curbuf->b_changedtick;
8202 	fnum = curbuf->b_fnum;
8203     }
8204 
8205     if (hlID == HLF_CHD || hlID == HLF_TXD)
8206     {
8207 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8208 	if (col >= change_start && col <= change_end)
8209 	    hlID = HLF_TXD;			/* changed text */
8210 	else
8211 	    hlID = HLF_CHD;			/* changed line */
8212     }
8213     rettv->vval.v_number = hlID == (enum hlf_value)0 ? 0 : (int)hlID;
8214 #endif
8215 }
8216 
8217 /*
8218  * "empty({expr})" function
8219  */
8220     static void
8221 f_empty(argvars, rettv)
8222     typval_T	*argvars;
8223     typval_T	*rettv;
8224 {
8225     int		n;
8226 
8227     switch (argvars[0].v_type)
8228     {
8229 	case VAR_STRING:
8230 	case VAR_FUNC:
8231 	    n = argvars[0].vval.v_string == NULL
8232 					  || *argvars[0].vval.v_string == NUL;
8233 	    break;
8234 	case VAR_NUMBER:
8235 	    n = argvars[0].vval.v_number == 0;
8236 	    break;
8237 	case VAR_LIST:
8238 	    n = argvars[0].vval.v_list == NULL
8239 				  || argvars[0].vval.v_list->lv_first == NULL;
8240 	    break;
8241 	case VAR_DICT:
8242 	    n = argvars[0].vval.v_dict == NULL
8243 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8244 	    break;
8245 	default:
8246 	    EMSG2(_(e_intern2), "f_empty()");
8247 	    n = 0;
8248     }
8249 
8250     rettv->vval.v_number = n;
8251 }
8252 
8253 /*
8254  * "escape({string}, {chars})" function
8255  */
8256     static void
8257 f_escape(argvars, rettv)
8258     typval_T	*argvars;
8259     typval_T	*rettv;
8260 {
8261     char_u	buf[NUMBUFLEN];
8262 
8263     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8264 					 get_tv_string_buf(&argvars[1], buf));
8265     rettv->v_type = VAR_STRING;
8266 }
8267 
8268 /*
8269  * "eval()" function
8270  */
8271 /*ARGSUSED*/
8272     static void
8273 f_eval(argvars, rettv)
8274     typval_T	*argvars;
8275     typval_T	*rettv;
8276 {
8277     char_u	*s;
8278 
8279     s = get_tv_string_chk(&argvars[0]);
8280     if (s != NULL)
8281 	s = skipwhite(s);
8282 
8283     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8284     {
8285 	rettv->v_type = VAR_NUMBER;
8286 	rettv->vval.v_number = 0;
8287     }
8288     else if (*s != NUL)
8289 	EMSG(_(e_trailing));
8290 }
8291 
8292 /*
8293  * "eventhandler()" function
8294  */
8295 /*ARGSUSED*/
8296     static void
8297 f_eventhandler(argvars, rettv)
8298     typval_T	*argvars;
8299     typval_T	*rettv;
8300 {
8301     rettv->vval.v_number = vgetc_busy;
8302 }
8303 
8304 /*
8305  * "executable()" function
8306  */
8307     static void
8308 f_executable(argvars, rettv)
8309     typval_T	*argvars;
8310     typval_T	*rettv;
8311 {
8312     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8313 }
8314 
8315 /*
8316  * "exists()" function
8317  */
8318     static void
8319 f_exists(argvars, rettv)
8320     typval_T	*argvars;
8321     typval_T	*rettv;
8322 {
8323     char_u	*p;
8324     char_u	*name;
8325     int		n = FALSE;
8326     int		len = 0;
8327 
8328     p = get_tv_string(&argvars[0]);
8329     if (*p == '$')			/* environment variable */
8330     {
8331 	/* first try "normal" environment variables (fast) */
8332 	if (mch_getenv(p + 1) != NULL)
8333 	    n = TRUE;
8334 	else
8335 	{
8336 	    /* try expanding things like $VIM and ${HOME} */
8337 	    p = expand_env_save(p);
8338 	    if (p != NULL && *p != '$')
8339 		n = TRUE;
8340 	    vim_free(p);
8341 	}
8342     }
8343     else if (*p == '&' || *p == '+')			/* option */
8344 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8345     else if (*p == '*')			/* internal or user defined function */
8346     {
8347 	n = function_exists(p + 1);
8348     }
8349     else if (*p == ':')
8350     {
8351 	n = cmd_exists(p + 1);
8352     }
8353     else if (*p == '#')
8354     {
8355 #ifdef FEAT_AUTOCMD
8356 	name = p + 1;
8357 	p = vim_strchr(name, '#');
8358 	if (p != NULL)
8359 	    n = au_exists(name, p, p + 1);
8360 	else
8361 	    n = au_exists(name, name + STRLEN(name), NULL);
8362 #endif
8363     }
8364     else				/* internal variable */
8365     {
8366 	char_u	    *tofree;
8367 	typval_T    tv;
8368 
8369 	/* get_name_len() takes care of expanding curly braces */
8370 	name = p;
8371 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8372 	if (len > 0)
8373 	{
8374 	    if (tofree != NULL)
8375 		name = tofree;
8376 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8377 	    if (n)
8378 	    {
8379 		/* handle d.key, l[idx], f(expr) */
8380 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8381 		if (n)
8382 		    clear_tv(&tv);
8383 	    }
8384 	}
8385 
8386 	vim_free(tofree);
8387     }
8388 
8389     rettv->vval.v_number = n;
8390 }
8391 
8392 /*
8393  * "expand()" function
8394  */
8395     static void
8396 f_expand(argvars, rettv)
8397     typval_T	*argvars;
8398     typval_T	*rettv;
8399 {
8400     char_u	*s;
8401     int		len;
8402     char_u	*errormsg;
8403     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8404     expand_T	xpc;
8405     int		error = FALSE;
8406 
8407     rettv->v_type = VAR_STRING;
8408     s = get_tv_string(&argvars[0]);
8409     if (*s == '%' || *s == '#' || *s == '<')
8410     {
8411 	++emsg_off;
8412 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8413 	--emsg_off;
8414     }
8415     else
8416     {
8417 	/* When the optional second argument is non-zero, don't remove matches
8418 	 * for 'suffixes' and 'wildignore' */
8419 	if (argvars[1].v_type != VAR_UNKNOWN
8420 				    && get_tv_number_chk(&argvars[1], &error))
8421 	    flags |= WILD_KEEP_ALL;
8422 	if (!error)
8423 	{
8424 	    ExpandInit(&xpc);
8425 	    xpc.xp_context = EXPAND_FILES;
8426 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8427 	    ExpandCleanup(&xpc);
8428 	}
8429 	else
8430 	    rettv->vval.v_string = NULL;
8431     }
8432 }
8433 
8434 /*
8435  * "extend(list, list [, idx])" function
8436  * "extend(dict, dict [, action])" function
8437  */
8438     static void
8439 f_extend(argvars, rettv)
8440     typval_T	*argvars;
8441     typval_T	*rettv;
8442 {
8443     rettv->vval.v_number = 0;
8444     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8445     {
8446 	list_T		*l1, *l2;
8447 	listitem_T	*item;
8448 	long		before;
8449 	int		error = FALSE;
8450 
8451 	l1 = argvars[0].vval.v_list;
8452 	l2 = argvars[1].vval.v_list;
8453 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8454 		&& l2 != NULL)
8455 	{
8456 	    if (argvars[2].v_type != VAR_UNKNOWN)
8457 	    {
8458 		before = get_tv_number_chk(&argvars[2], &error);
8459 		if (error)
8460 		    return;		/* type error; errmsg already given */
8461 
8462 		if (before == l1->lv_len)
8463 		    item = NULL;
8464 		else
8465 		{
8466 		    item = list_find(l1, before);
8467 		    if (item == NULL)
8468 		    {
8469 			EMSGN(_(e_listidx), before);
8470 			return;
8471 		    }
8472 		}
8473 	    }
8474 	    else
8475 		item = NULL;
8476 	    list_extend(l1, l2, item);
8477 
8478 	    copy_tv(&argvars[0], rettv);
8479 	}
8480     }
8481     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8482     {
8483 	dict_T		*d1, *d2;
8484 	dictitem_T	*di1;
8485 	char_u		*action;
8486 	int		i;
8487 	hashitem_T	*hi2;
8488 	int		todo;
8489 
8490 	d1 = argvars[0].vval.v_dict;
8491 	d2 = argvars[1].vval.v_dict;
8492 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8493 		&& d2 != NULL)
8494 	{
8495 	    /* Check the third argument. */
8496 	    if (argvars[2].v_type != VAR_UNKNOWN)
8497 	    {
8498 		static char *(av[]) = {"keep", "force", "error"};
8499 
8500 		action = get_tv_string_chk(&argvars[2]);
8501 		if (action == NULL)
8502 		    return;		/* type error; errmsg already given */
8503 		for (i = 0; i < 3; ++i)
8504 		    if (STRCMP(action, av[i]) == 0)
8505 			break;
8506 		if (i == 3)
8507 		{
8508 		    EMSGN(_(e_invarg2), action);
8509 		    return;
8510 		}
8511 	    }
8512 	    else
8513 		action = (char_u *)"force";
8514 
8515 	    /* Go over all entries in the second dict and add them to the
8516 	     * first dict. */
8517 	    todo = d2->dv_hashtab.ht_used;
8518 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8519 	    {
8520 		if (!HASHITEM_EMPTY(hi2))
8521 		{
8522 		    --todo;
8523 		    di1 = dict_find(d1, hi2->hi_key, -1);
8524 		    if (di1 == NULL)
8525 		    {
8526 			di1 = dictitem_copy(HI2DI(hi2));
8527 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8528 			    dictitem_free(di1);
8529 		    }
8530 		    else if (*action == 'e')
8531 		    {
8532 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8533 			break;
8534 		    }
8535 		    else if (*action == 'f')
8536 		    {
8537 			clear_tv(&di1->di_tv);
8538 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8539 		    }
8540 		}
8541 	    }
8542 
8543 	    copy_tv(&argvars[0], rettv);
8544 	}
8545     }
8546     else
8547 	EMSG2(_(e_listdictarg), "extend()");
8548 }
8549 
8550 /*
8551  * "filereadable()" function
8552  */
8553     static void
8554 f_filereadable(argvars, rettv)
8555     typval_T	*argvars;
8556     typval_T	*rettv;
8557 {
8558     FILE	*fd;
8559     char_u	*p;
8560     int		n;
8561 
8562     p = get_tv_string(&argvars[0]);
8563     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8564     {
8565 	n = TRUE;
8566 	fclose(fd);
8567     }
8568     else
8569 	n = FALSE;
8570 
8571     rettv->vval.v_number = n;
8572 }
8573 
8574 /*
8575  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8576  * rights to write into.
8577  */
8578     static void
8579 f_filewritable(argvars, rettv)
8580     typval_T	*argvars;
8581     typval_T	*rettv;
8582 {
8583     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8584 }
8585 
8586 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8587 
8588     static void
8589 findfilendir(argvars, rettv, dir)
8590     typval_T	*argvars;
8591     typval_T	*rettv;
8592     int		dir;
8593 {
8594 #ifdef FEAT_SEARCHPATH
8595     char_u	*fname;
8596     char_u	*fresult = NULL;
8597     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8598     char_u	*p;
8599     char_u	pathbuf[NUMBUFLEN];
8600     int		count = 1;
8601     int		first = TRUE;
8602 
8603     fname = get_tv_string(&argvars[0]);
8604 
8605     if (argvars[1].v_type != VAR_UNKNOWN)
8606     {
8607 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8608 	if (p == NULL)
8609 	    count = -1;	    /* error */
8610 	else
8611 	{
8612 	    if (*p != NUL)
8613 		path = p;
8614 
8615 	    if (argvars[2].v_type != VAR_UNKNOWN)
8616 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8617 	}
8618     }
8619 
8620     if (*fname != NUL && count >= 0)
8621     {
8622 	do
8623 	{
8624 	    vim_free(fresult);
8625 	    fresult = find_file_in_path_option(first ? fname : NULL,
8626 					       first ? (int)STRLEN(fname) : 0,
8627 					       0, first, path, dir, NULL);
8628 	    first = FALSE;
8629 	} while (--count > 0 && fresult != NULL);
8630     }
8631 
8632     rettv->vval.v_string = fresult;
8633 #else
8634     rettv->vval.v_string = NULL;
8635 #endif
8636     rettv->v_type = VAR_STRING;
8637 }
8638 
8639 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8640 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8641 
8642 /*
8643  * Implementation of map() and filter().
8644  */
8645     static void
8646 filter_map(argvars, rettv, map)
8647     typval_T	*argvars;
8648     typval_T	*rettv;
8649     int		map;
8650 {
8651     char_u	buf[NUMBUFLEN];
8652     char_u	*expr;
8653     listitem_T	*li, *nli;
8654     list_T	*l = NULL;
8655     dictitem_T	*di;
8656     hashtab_T	*ht;
8657     hashitem_T	*hi;
8658     dict_T	*d = NULL;
8659     typval_T	save_val;
8660     typval_T	save_key;
8661     int		rem;
8662     int		todo;
8663     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8664 
8665 
8666     rettv->vval.v_number = 0;
8667     if (argvars[0].v_type == VAR_LIST)
8668     {
8669 	if ((l = argvars[0].vval.v_list) == NULL
8670 		|| (map && tv_check_lock(l->lv_lock, msg)))
8671 	    return;
8672     }
8673     else if (argvars[0].v_type == VAR_DICT)
8674     {
8675 	if ((d = argvars[0].vval.v_dict) == NULL
8676 		|| (map && tv_check_lock(d->dv_lock, msg)))
8677 	    return;
8678     }
8679     else
8680     {
8681 	EMSG2(_(e_listdictarg), msg);
8682 	return;
8683     }
8684 
8685     expr = get_tv_string_buf_chk(&argvars[1], buf);
8686     /* On type errors, the preceding call has already displayed an error
8687      * message.  Avoid a misleading error message for an empty string that
8688      * was not passed as argument. */
8689     if (expr != NULL)
8690     {
8691 	prepare_vimvar(VV_VAL, &save_val);
8692 	expr = skipwhite(expr);
8693 
8694 	if (argvars[0].v_type == VAR_DICT)
8695 	{
8696 	    prepare_vimvar(VV_KEY, &save_key);
8697 	    vimvars[VV_KEY].vv_type = VAR_STRING;
8698 
8699 	    ht = &d->dv_hashtab;
8700 	    hash_lock(ht);
8701 	    todo = ht->ht_used;
8702 	    for (hi = ht->ht_array; todo > 0; ++hi)
8703 	    {
8704 		if (!HASHITEM_EMPTY(hi))
8705 		{
8706 		    --todo;
8707 		    di = HI2DI(hi);
8708 		    if (tv_check_lock(di->di_tv.v_lock, msg))
8709 			break;
8710 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
8711 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL)
8712 			break;
8713 		    if (!map && rem)
8714 			dictitem_remove(d, di);
8715 		    clear_tv(&vimvars[VV_KEY].vv_tv);
8716 		}
8717 	    }
8718 	    hash_unlock(ht);
8719 
8720 	    restore_vimvar(VV_KEY, &save_key);
8721 	}
8722 	else
8723 	{
8724 	    for (li = l->lv_first; li != NULL; li = nli)
8725 	    {
8726 		if (tv_check_lock(li->li_tv.v_lock, msg))
8727 		    break;
8728 		nli = li->li_next;
8729 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL)
8730 		    break;
8731 		if (!map && rem)
8732 		    listitem_remove(l, li);
8733 	    }
8734 	}
8735 
8736 	restore_vimvar(VV_VAL, &save_val);
8737     }
8738 
8739     copy_tv(&argvars[0], rettv);
8740 }
8741 
8742     static int
8743 filter_map_one(tv, expr, map, remp)
8744     typval_T	*tv;
8745     char_u	*expr;
8746     int		map;
8747     int		*remp;
8748 {
8749     typval_T	rettv;
8750     char_u	*s;
8751 
8752     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
8753     s = expr;
8754     if (eval1(&s, &rettv, TRUE) == FAIL)
8755 	return FAIL;
8756     if (*s != NUL)  /* check for trailing chars after expr */
8757     {
8758 	EMSG2(_(e_invexpr2), s);
8759 	return FAIL;
8760     }
8761     if (map)
8762     {
8763 	/* map(): replace the list item value */
8764 	clear_tv(tv);
8765 	*tv = rettv;
8766     }
8767     else
8768     {
8769 	int	    error = FALSE;
8770 
8771 	/* filter(): when expr is zero remove the item */
8772 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
8773 	clear_tv(&rettv);
8774 	/* On type error, nothing has been removed; return FAIL to stop the
8775 	 * loop.  The error message was given by get_tv_number_chk(). */
8776 	if (error)
8777 	    return FAIL;
8778     }
8779     clear_tv(&vimvars[VV_VAL].vv_tv);
8780     return OK;
8781 }
8782 
8783 /*
8784  * "filter()" function
8785  */
8786     static void
8787 f_filter(argvars, rettv)
8788     typval_T	*argvars;
8789     typval_T	*rettv;
8790 {
8791     filter_map(argvars, rettv, FALSE);
8792 }
8793 
8794 /*
8795  * "finddir({fname}[, {path}[, {count}]])" function
8796  */
8797     static void
8798 f_finddir(argvars, rettv)
8799     typval_T	*argvars;
8800     typval_T	*rettv;
8801 {
8802     findfilendir(argvars, rettv, TRUE);
8803 }
8804 
8805 /*
8806  * "findfile({fname}[, {path}[, {count}]])" function
8807  */
8808     static void
8809 f_findfile(argvars, rettv)
8810     typval_T	*argvars;
8811     typval_T	*rettv;
8812 {
8813     findfilendir(argvars, rettv, FALSE);
8814 }
8815 
8816 /*
8817  * "fnamemodify({fname}, {mods})" function
8818  */
8819     static void
8820 f_fnamemodify(argvars, rettv)
8821     typval_T	*argvars;
8822     typval_T	*rettv;
8823 {
8824     char_u	*fname;
8825     char_u	*mods;
8826     int		usedlen = 0;
8827     int		len;
8828     char_u	*fbuf = NULL;
8829     char_u	buf[NUMBUFLEN];
8830 
8831     fname = get_tv_string_chk(&argvars[0]);
8832     mods = get_tv_string_buf_chk(&argvars[1], buf);
8833     if (fname == NULL || mods == NULL)
8834 	fname = NULL;
8835     else
8836     {
8837 	len = (int)STRLEN(fname);
8838 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
8839     }
8840 
8841     rettv->v_type = VAR_STRING;
8842     if (fname == NULL)
8843 	rettv->vval.v_string = NULL;
8844     else
8845 	rettv->vval.v_string = vim_strnsave(fname, len);
8846     vim_free(fbuf);
8847 }
8848 
8849 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
8850 
8851 /*
8852  * "foldclosed()" function
8853  */
8854     static void
8855 foldclosed_both(argvars, rettv, end)
8856     typval_T	*argvars;
8857     typval_T	*rettv;
8858     int		end;
8859 {
8860 #ifdef FEAT_FOLDING
8861     linenr_T	lnum;
8862     linenr_T	first, last;
8863 
8864     lnum = get_tv_lnum(argvars);
8865     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8866     {
8867 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
8868 	{
8869 	    if (end)
8870 		rettv->vval.v_number = (varnumber_T)last;
8871 	    else
8872 		rettv->vval.v_number = (varnumber_T)first;
8873 	    return;
8874 	}
8875     }
8876 #endif
8877     rettv->vval.v_number = -1;
8878 }
8879 
8880 /*
8881  * "foldclosed()" function
8882  */
8883     static void
8884 f_foldclosed(argvars, rettv)
8885     typval_T	*argvars;
8886     typval_T	*rettv;
8887 {
8888     foldclosed_both(argvars, rettv, FALSE);
8889 }
8890 
8891 /*
8892  * "foldclosedend()" function
8893  */
8894     static void
8895 f_foldclosedend(argvars, rettv)
8896     typval_T	*argvars;
8897     typval_T	*rettv;
8898 {
8899     foldclosed_both(argvars, rettv, TRUE);
8900 }
8901 
8902 /*
8903  * "foldlevel()" function
8904  */
8905     static void
8906 f_foldlevel(argvars, rettv)
8907     typval_T	*argvars;
8908     typval_T	*rettv;
8909 {
8910 #ifdef FEAT_FOLDING
8911     linenr_T	lnum;
8912 
8913     lnum = get_tv_lnum(argvars);
8914     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8915 	rettv->vval.v_number = foldLevel(lnum);
8916     else
8917 #endif
8918 	rettv->vval.v_number = 0;
8919 }
8920 
8921 /*
8922  * "foldtext()" function
8923  */
8924 /*ARGSUSED*/
8925     static void
8926 f_foldtext(argvars, rettv)
8927     typval_T	*argvars;
8928     typval_T	*rettv;
8929 {
8930 #ifdef FEAT_FOLDING
8931     linenr_T	lnum;
8932     char_u	*s;
8933     char_u	*r;
8934     int		len;
8935     char	*txt;
8936 #endif
8937 
8938     rettv->v_type = VAR_STRING;
8939     rettv->vval.v_string = NULL;
8940 #ifdef FEAT_FOLDING
8941     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
8942 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
8943 						 <= curbuf->b_ml.ml_line_count
8944 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
8945     {
8946 	/* Find first non-empty line in the fold. */
8947 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
8948 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8949 	{
8950 	    if (!linewhite(lnum))
8951 		break;
8952 	    ++lnum;
8953 	}
8954 
8955 	/* Find interesting text in this line. */
8956 	s = skipwhite(ml_get(lnum));
8957 	/* skip C comment-start */
8958 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
8959 	{
8960 	    s = skipwhite(s + 2);
8961 	    if (*skipwhite(s) == NUL
8962 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8963 	    {
8964 		s = skipwhite(ml_get(lnum + 1));
8965 		if (*s == '*')
8966 		    s = skipwhite(s + 1);
8967 	    }
8968 	}
8969 	txt = _("+-%s%3ld lines: ");
8970 	r = alloc((unsigned)(STRLEN(txt)
8971 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
8972 		    + 20				    /* for %3ld */
8973 		    + STRLEN(s)));			    /* concatenated */
8974 	if (r != NULL)
8975 	{
8976 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
8977 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
8978 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
8979 	    len = (int)STRLEN(r);
8980 	    STRCAT(r, s);
8981 	    /* remove 'foldmarker' and 'commentstring' */
8982 	    foldtext_cleanup(r + len);
8983 	    rettv->vval.v_string = r;
8984 	}
8985     }
8986 #endif
8987 }
8988 
8989 /*
8990  * "foldtextresult(lnum)" function
8991  */
8992 /*ARGSUSED*/
8993     static void
8994 f_foldtextresult(argvars, rettv)
8995     typval_T	*argvars;
8996     typval_T	*rettv;
8997 {
8998 #ifdef FEAT_FOLDING
8999     linenr_T	lnum;
9000     char_u	*text;
9001     char_u	buf[51];
9002     foldinfo_T  foldinfo;
9003     int		fold_count;
9004 #endif
9005 
9006     rettv->v_type = VAR_STRING;
9007     rettv->vval.v_string = NULL;
9008 #ifdef FEAT_FOLDING
9009     lnum = get_tv_lnum(argvars);
9010     /* treat illegal types and illegal string values for {lnum} the same */
9011     if (lnum < 0)
9012 	lnum = 0;
9013     fold_count = foldedCount(curwin, lnum, &foldinfo);
9014     if (fold_count > 0)
9015     {
9016 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9017 							      &foldinfo, buf);
9018 	if (text == buf)
9019 	    text = vim_strsave(text);
9020 	rettv->vval.v_string = text;
9021     }
9022 #endif
9023 }
9024 
9025 /*
9026  * "foreground()" function
9027  */
9028 /*ARGSUSED*/
9029     static void
9030 f_foreground(argvars, rettv)
9031     typval_T	*argvars;
9032     typval_T	*rettv;
9033 {
9034     rettv->vval.v_number = 0;
9035 #ifdef FEAT_GUI
9036     if (gui.in_use)
9037 	gui_mch_set_foreground();
9038 #else
9039 # ifdef WIN32
9040     win32_set_foreground();
9041 # endif
9042 #endif
9043 }
9044 
9045 /*
9046  * "function()" function
9047  */
9048 /*ARGSUSED*/
9049     static void
9050 f_function(argvars, rettv)
9051     typval_T	*argvars;
9052     typval_T	*rettv;
9053 {
9054     char_u	*s;
9055 
9056     rettv->vval.v_number = 0;
9057     s = get_tv_string(&argvars[0]);
9058     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9059 	EMSG2(_(e_invarg2), s);
9060     else if (!function_exists(s))
9061 	EMSG2(_("E700: Unknown function: %s"), s);
9062     else
9063     {
9064 	rettv->vval.v_string = vim_strsave(s);
9065 	rettv->v_type = VAR_FUNC;
9066     }
9067 }
9068 
9069 /*
9070  * "garbagecollect()" function
9071  */
9072 /*ARGSUSED*/
9073     static void
9074 f_garbagecollect(argvars, rettv)
9075     typval_T	*argvars;
9076     typval_T	*rettv;
9077 {
9078     garbage_collect();
9079 }
9080 
9081 /*
9082  * "get()" function
9083  */
9084     static void
9085 f_get(argvars, rettv)
9086     typval_T	*argvars;
9087     typval_T	*rettv;
9088 {
9089     listitem_T	*li;
9090     list_T	*l;
9091     dictitem_T	*di;
9092     dict_T	*d;
9093     typval_T	*tv = NULL;
9094 
9095     if (argvars[0].v_type == VAR_LIST)
9096     {
9097 	if ((l = argvars[0].vval.v_list) != NULL)
9098 	{
9099 	    int		error = FALSE;
9100 
9101 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9102 	    if (!error && li != NULL)
9103 		tv = &li->li_tv;
9104 	}
9105     }
9106     else if (argvars[0].v_type == VAR_DICT)
9107     {
9108 	if ((d = argvars[0].vval.v_dict) != NULL)
9109 	{
9110 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9111 	    if (di != NULL)
9112 		tv = &di->di_tv;
9113 	}
9114     }
9115     else
9116 	EMSG2(_(e_listdictarg), "get()");
9117 
9118     if (tv == NULL)
9119     {
9120 	if (argvars[2].v_type == VAR_UNKNOWN)
9121 	    rettv->vval.v_number = 0;
9122 	else
9123 	    copy_tv(&argvars[2], rettv);
9124     }
9125     else
9126 	copy_tv(tv, rettv);
9127 }
9128 
9129 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9130 
9131 /*
9132  * Get line or list of lines from buffer "buf" into "rettv".
9133  * Return a range (from start to end) of lines in rettv from the specified
9134  * buffer.
9135  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9136  */
9137     static void
9138 get_buffer_lines(buf, start, end, retlist, rettv)
9139     buf_T	*buf;
9140     linenr_T	start;
9141     linenr_T	end;
9142     int		retlist;
9143     typval_T	*rettv;
9144 {
9145     char_u	*p;
9146     list_T	*l = NULL;
9147     listitem_T	*li;
9148 
9149     if (retlist)
9150     {
9151 	l = list_alloc();
9152 	if (l == NULL)
9153 	    return;
9154 
9155 	rettv->vval.v_list = l;
9156 	rettv->v_type = VAR_LIST;
9157 	++l->lv_refcount;
9158     }
9159     else
9160 	rettv->vval.v_number = 0;
9161 
9162     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9163 	return;
9164 
9165     if (!retlist)
9166     {
9167 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9168 	    p = ml_get_buf(buf, start, FALSE);
9169 	else
9170 	    p = (char_u *)"";
9171 
9172 	rettv->v_type = VAR_STRING;
9173 	rettv->vval.v_string = vim_strsave(p);
9174     }
9175     else
9176     {
9177 	if (end < start)
9178 	    return;
9179 
9180 	if (start < 1)
9181 	    start = 1;
9182 	if (end > buf->b_ml.ml_line_count)
9183 	    end = buf->b_ml.ml_line_count;
9184 	while (start <= end)
9185 	{
9186 	    li = listitem_alloc();
9187 	    if (li == NULL)
9188 		break;
9189 	    list_append(l, li);
9190 	    li->li_tv.v_type = VAR_STRING;
9191 	    li->li_tv.v_lock = 0;
9192 	    li->li_tv.vval.v_string =
9193 		vim_strsave(ml_get_buf(buf, start++, FALSE));
9194 	}
9195     }
9196 }
9197 
9198 /*
9199  * "getbufline()" function
9200  */
9201     static void
9202 f_getbufline(argvars, rettv)
9203     typval_T	*argvars;
9204     typval_T	*rettv;
9205 {
9206     linenr_T	lnum;
9207     linenr_T	end;
9208     buf_T	*buf;
9209 
9210     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9211     ++emsg_off;
9212     buf = get_buf_tv(&argvars[0]);
9213     --emsg_off;
9214 
9215     lnum = get_tv_lnum_buf(&argvars[1], buf);
9216     if (argvars[2].v_type == VAR_UNKNOWN)
9217 	end = lnum;
9218     else
9219 	end = get_tv_lnum_buf(&argvars[2], buf);
9220 
9221     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9222 }
9223 
9224 /*
9225  * "getbufvar()" function
9226  */
9227     static void
9228 f_getbufvar(argvars, rettv)
9229     typval_T	*argvars;
9230     typval_T	*rettv;
9231 {
9232     buf_T	*buf;
9233     buf_T	*save_curbuf;
9234     char_u	*varname;
9235     dictitem_T	*v;
9236 
9237     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9238     varname = get_tv_string_chk(&argvars[1]);
9239     ++emsg_off;
9240     buf = get_buf_tv(&argvars[0]);
9241 
9242     rettv->v_type = VAR_STRING;
9243     rettv->vval.v_string = NULL;
9244 
9245     if (buf != NULL && varname != NULL)
9246     {
9247 	if (*varname == '&')	/* buffer-local-option */
9248 	{
9249 	    /* set curbuf to be our buf, temporarily */
9250 	    save_curbuf = curbuf;
9251 	    curbuf = buf;
9252 
9253 	    get_option_tv(&varname, rettv, TRUE);
9254 
9255 	    /* restore previous notion of curbuf */
9256 	    curbuf = save_curbuf;
9257 	}
9258 	else
9259 	{
9260 	    if (*varname == NUL)
9261 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9262 		 * scope prefix before the NUL byte is required by
9263 		 * find_var_in_ht(). */
9264 		varname = (char_u *)"b:" + 2;
9265 	    /* look up the variable */
9266 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9267 	    if (v != NULL)
9268 		copy_tv(&v->di_tv, rettv);
9269 	}
9270     }
9271 
9272     --emsg_off;
9273 }
9274 
9275 /*
9276  * "getchar()" function
9277  */
9278     static void
9279 f_getchar(argvars, rettv)
9280     typval_T	*argvars;
9281     typval_T	*rettv;
9282 {
9283     varnumber_T		n;
9284     int			error = FALSE;
9285 
9286     ++no_mapping;
9287     ++allow_keys;
9288     if (argvars[0].v_type == VAR_UNKNOWN)
9289 	/* getchar(): blocking wait. */
9290 	n = safe_vgetc();
9291     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9292 	/* getchar(1): only check if char avail */
9293 	n = vpeekc();
9294     else if (error || vpeekc() == NUL)
9295 	/* illegal argument or getchar(0) and no char avail: return zero */
9296 	n = 0;
9297     else
9298 	/* getchar(0) and char avail: return char */
9299 	n = safe_vgetc();
9300     --no_mapping;
9301     --allow_keys;
9302 
9303     rettv->vval.v_number = n;
9304     if (IS_SPECIAL(n) || mod_mask != 0)
9305     {
9306 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9307 	int		i = 0;
9308 
9309 	/* Turn a special key into three bytes, plus modifier. */
9310 	if (mod_mask != 0)
9311 	{
9312 	    temp[i++] = K_SPECIAL;
9313 	    temp[i++] = KS_MODIFIER;
9314 	    temp[i++] = mod_mask;
9315 	}
9316 	if (IS_SPECIAL(n))
9317 	{
9318 	    temp[i++] = K_SPECIAL;
9319 	    temp[i++] = K_SECOND(n);
9320 	    temp[i++] = K_THIRD(n);
9321 	}
9322 #ifdef FEAT_MBYTE
9323 	else if (has_mbyte)
9324 	    i += (*mb_char2bytes)(n, temp + i);
9325 #endif
9326 	else
9327 	    temp[i++] = n;
9328 	temp[i++] = NUL;
9329 	rettv->v_type = VAR_STRING;
9330 	rettv->vval.v_string = vim_strsave(temp);
9331     }
9332 }
9333 
9334 /*
9335  * "getcharmod()" function
9336  */
9337 /*ARGSUSED*/
9338     static void
9339 f_getcharmod(argvars, rettv)
9340     typval_T	*argvars;
9341     typval_T	*rettv;
9342 {
9343     rettv->vval.v_number = mod_mask;
9344 }
9345 
9346 /*
9347  * "getcmdline()" function
9348  */
9349 /*ARGSUSED*/
9350     static void
9351 f_getcmdline(argvars, rettv)
9352     typval_T	*argvars;
9353     typval_T	*rettv;
9354 {
9355     rettv->v_type = VAR_STRING;
9356     rettv->vval.v_string = get_cmdline_str();
9357 }
9358 
9359 /*
9360  * "getcmdpos()" function
9361  */
9362 /*ARGSUSED*/
9363     static void
9364 f_getcmdpos(argvars, rettv)
9365     typval_T	*argvars;
9366     typval_T	*rettv;
9367 {
9368     rettv->vval.v_number = get_cmdline_pos() + 1;
9369 }
9370 
9371 /*
9372  * "getcwd()" function
9373  */
9374 /*ARGSUSED*/
9375     static void
9376 f_getcwd(argvars, rettv)
9377     typval_T	*argvars;
9378     typval_T	*rettv;
9379 {
9380     char_u	cwd[MAXPATHL];
9381 
9382     rettv->v_type = VAR_STRING;
9383     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9384 	rettv->vval.v_string = NULL;
9385     else
9386     {
9387 	rettv->vval.v_string = vim_strsave(cwd);
9388 #ifdef BACKSLASH_IN_FILENAME
9389 	if (rettv->vval.v_string != NULL)
9390 	    slash_adjust(rettv->vval.v_string);
9391 #endif
9392     }
9393 }
9394 
9395 /*
9396  * "getfontname()" function
9397  */
9398 /*ARGSUSED*/
9399     static void
9400 f_getfontname(argvars, rettv)
9401     typval_T	*argvars;
9402     typval_T	*rettv;
9403 {
9404     rettv->v_type = VAR_STRING;
9405     rettv->vval.v_string = NULL;
9406 #ifdef FEAT_GUI
9407     if (gui.in_use)
9408     {
9409 	GuiFont font;
9410 	char_u	*name = NULL;
9411 
9412 	if (argvars[0].v_type == VAR_UNKNOWN)
9413 	{
9414 	    /* Get the "Normal" font.  Either the name saved by
9415 	     * hl_set_font_name() or from the font ID. */
9416 	    font = gui.norm_font;
9417 	    name = hl_get_font_name();
9418 	}
9419 	else
9420 	{
9421 	    name = get_tv_string(&argvars[0]);
9422 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9423 		return;
9424 	    font = gui_mch_get_font(name, FALSE);
9425 	    if (font == NOFONT)
9426 		return;	    /* Invalid font name, return empty string. */
9427 	}
9428 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9429 	if (argvars[0].v_type != VAR_UNKNOWN)
9430 	    gui_mch_free_font(font);
9431     }
9432 #endif
9433 }
9434 
9435 /*
9436  * "getfperm({fname})" function
9437  */
9438     static void
9439 f_getfperm(argvars, rettv)
9440     typval_T	*argvars;
9441     typval_T	*rettv;
9442 {
9443     char_u	*fname;
9444     struct stat st;
9445     char_u	*perm = NULL;
9446     char_u	flags[] = "rwx";
9447     int		i;
9448 
9449     fname = get_tv_string(&argvars[0]);
9450 
9451     rettv->v_type = VAR_STRING;
9452     if (mch_stat((char *)fname, &st) >= 0)
9453     {
9454 	perm = vim_strsave((char_u *)"---------");
9455 	if (perm != NULL)
9456 	{
9457 	    for (i = 0; i < 9; i++)
9458 	    {
9459 		if (st.st_mode & (1 << (8 - i)))
9460 		    perm[i] = flags[i % 3];
9461 	    }
9462 	}
9463     }
9464     rettv->vval.v_string = perm;
9465 }
9466 
9467 /*
9468  * "getfsize({fname})" function
9469  */
9470     static void
9471 f_getfsize(argvars, rettv)
9472     typval_T	*argvars;
9473     typval_T	*rettv;
9474 {
9475     char_u	*fname;
9476     struct stat	st;
9477 
9478     fname = get_tv_string(&argvars[0]);
9479 
9480     rettv->v_type = VAR_NUMBER;
9481 
9482     if (mch_stat((char *)fname, &st) >= 0)
9483     {
9484 	if (mch_isdir(fname))
9485 	    rettv->vval.v_number = 0;
9486 	else
9487 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9488     }
9489     else
9490 	  rettv->vval.v_number = -1;
9491 }
9492 
9493 /*
9494  * "getftime({fname})" function
9495  */
9496     static void
9497 f_getftime(argvars, rettv)
9498     typval_T	*argvars;
9499     typval_T	*rettv;
9500 {
9501     char_u	*fname;
9502     struct stat	st;
9503 
9504     fname = get_tv_string(&argvars[0]);
9505 
9506     if (mch_stat((char *)fname, &st) >= 0)
9507 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9508     else
9509 	rettv->vval.v_number = -1;
9510 }
9511 
9512 /*
9513  * "getftype({fname})" function
9514  */
9515     static void
9516 f_getftype(argvars, rettv)
9517     typval_T	*argvars;
9518     typval_T	*rettv;
9519 {
9520     char_u	*fname;
9521     struct stat st;
9522     char_u	*type = NULL;
9523     char	*t;
9524 
9525     fname = get_tv_string(&argvars[0]);
9526 
9527     rettv->v_type = VAR_STRING;
9528     if (mch_lstat((char *)fname, &st) >= 0)
9529     {
9530 #ifdef S_ISREG
9531 	if (S_ISREG(st.st_mode))
9532 	    t = "file";
9533 	else if (S_ISDIR(st.st_mode))
9534 	    t = "dir";
9535 # ifdef S_ISLNK
9536 	else if (S_ISLNK(st.st_mode))
9537 	    t = "link";
9538 # endif
9539 # ifdef S_ISBLK
9540 	else if (S_ISBLK(st.st_mode))
9541 	    t = "bdev";
9542 # endif
9543 # ifdef S_ISCHR
9544 	else if (S_ISCHR(st.st_mode))
9545 	    t = "cdev";
9546 # endif
9547 # ifdef S_ISFIFO
9548 	else if (S_ISFIFO(st.st_mode))
9549 	    t = "fifo";
9550 # endif
9551 # ifdef S_ISSOCK
9552 	else if (S_ISSOCK(st.st_mode))
9553 	    t = "fifo";
9554 # endif
9555 	else
9556 	    t = "other";
9557 #else
9558 # ifdef S_IFMT
9559 	switch (st.st_mode & S_IFMT)
9560 	{
9561 	    case S_IFREG: t = "file"; break;
9562 	    case S_IFDIR: t = "dir"; break;
9563 #  ifdef S_IFLNK
9564 	    case S_IFLNK: t = "link"; break;
9565 #  endif
9566 #  ifdef S_IFBLK
9567 	    case S_IFBLK: t = "bdev"; break;
9568 #  endif
9569 #  ifdef S_IFCHR
9570 	    case S_IFCHR: t = "cdev"; break;
9571 #  endif
9572 #  ifdef S_IFIFO
9573 	    case S_IFIFO: t = "fifo"; break;
9574 #  endif
9575 #  ifdef S_IFSOCK
9576 	    case S_IFSOCK: t = "socket"; break;
9577 #  endif
9578 	    default: t = "other";
9579 	}
9580 # else
9581 	if (mch_isdir(fname))
9582 	    t = "dir";
9583 	else
9584 	    t = "file";
9585 # endif
9586 #endif
9587 	type = vim_strsave((char_u *)t);
9588     }
9589     rettv->vval.v_string = type;
9590 }
9591 
9592 /*
9593  * "getline(lnum, [end])" function
9594  */
9595     static void
9596 f_getline(argvars, rettv)
9597     typval_T	*argvars;
9598     typval_T	*rettv;
9599 {
9600     linenr_T	lnum;
9601     linenr_T	end;
9602     int		retlist;
9603 
9604     lnum = get_tv_lnum(argvars);
9605     if (argvars[1].v_type == VAR_UNKNOWN)
9606     {
9607 	end = 0;
9608 	retlist = FALSE;
9609     }
9610     else
9611     {
9612 	end = get_tv_lnum(&argvars[1]);
9613 	retlist = TRUE;
9614     }
9615 
9616     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9617 }
9618 
9619 /*
9620  * "getqflist()" function
9621  */
9622 /*ARGSUSED*/
9623     static void
9624 f_getqflist(argvars, rettv)
9625     typval_T	*argvars;
9626     typval_T	*rettv;
9627 {
9628 #ifdef FEAT_QUICKFIX
9629     list_T	*l;
9630 #endif
9631 
9632     rettv->vval.v_number = FALSE;
9633 #ifdef FEAT_QUICKFIX
9634     l = list_alloc();
9635     if (l != NULL)
9636     {
9637 	if (get_errorlist(l) != FAIL)
9638 	{
9639 	    rettv->vval.v_list = l;
9640 	    rettv->v_type = VAR_LIST;
9641 	    ++l->lv_refcount;
9642 	}
9643 	else
9644 	    list_free(l);
9645     }
9646 #endif
9647 }
9648 
9649 /*
9650  * "getreg()" function
9651  */
9652     static void
9653 f_getreg(argvars, rettv)
9654     typval_T	*argvars;
9655     typval_T	*rettv;
9656 {
9657     char_u	*strregname;
9658     int		regname;
9659     int		arg2 = FALSE;
9660     int		error = FALSE;
9661 
9662     if (argvars[0].v_type != VAR_UNKNOWN)
9663     {
9664 	strregname = get_tv_string_chk(&argvars[0]);
9665 	error = strregname == NULL;
9666 	if (argvars[1].v_type != VAR_UNKNOWN)
9667 	    arg2 = get_tv_number_chk(&argvars[1], &error);
9668     }
9669     else
9670 	strregname = vimvars[VV_REG].vv_str;
9671     regname = (strregname == NULL ? '"' : *strregname);
9672     if (regname == 0)
9673 	regname = '"';
9674 
9675     rettv->v_type = VAR_STRING;
9676     rettv->vval.v_string = error ? NULL :
9677 				    get_reg_contents(regname, TRUE, arg2);
9678 }
9679 
9680 /*
9681  * "getregtype()" function
9682  */
9683     static void
9684 f_getregtype(argvars, rettv)
9685     typval_T	*argvars;
9686     typval_T	*rettv;
9687 {
9688     char_u	*strregname;
9689     int		regname;
9690     char_u	buf[NUMBUFLEN + 2];
9691     long	reglen = 0;
9692 
9693     if (argvars[0].v_type != VAR_UNKNOWN)
9694     {
9695 	strregname = get_tv_string_chk(&argvars[0]);
9696 	if (strregname == NULL)	    /* type error; errmsg already given */
9697 	{
9698 	    rettv->v_type = VAR_STRING;
9699 	    rettv->vval.v_string = NULL;
9700 	    return;
9701 	}
9702     }
9703     else
9704 	/* Default to v:register */
9705 	strregname = vimvars[VV_REG].vv_str;
9706 
9707     regname = (strregname == NULL ? '"' : *strregname);
9708     if (regname == 0)
9709 	regname = '"';
9710 
9711     buf[0] = NUL;
9712     buf[1] = NUL;
9713     switch (get_reg_type(regname, &reglen))
9714     {
9715 	case MLINE: buf[0] = 'V'; break;
9716 	case MCHAR: buf[0] = 'v'; break;
9717 #ifdef FEAT_VISUAL
9718 	case MBLOCK:
9719 		buf[0] = Ctrl_V;
9720 		sprintf((char *)buf + 1, "%ld", reglen + 1);
9721 		break;
9722 #endif
9723     }
9724     rettv->v_type = VAR_STRING;
9725     rettv->vval.v_string = vim_strsave(buf);
9726 }
9727 
9728 /*
9729  * "getwinposx()" function
9730  */
9731 /*ARGSUSED*/
9732     static void
9733 f_getwinposx(argvars, rettv)
9734     typval_T	*argvars;
9735     typval_T	*rettv;
9736 {
9737     rettv->vval.v_number = -1;
9738 #ifdef FEAT_GUI
9739     if (gui.in_use)
9740     {
9741 	int	    x, y;
9742 
9743 	if (gui_mch_get_winpos(&x, &y) == OK)
9744 	    rettv->vval.v_number = x;
9745     }
9746 #endif
9747 }
9748 
9749 /*
9750  * "getwinposy()" function
9751  */
9752 /*ARGSUSED*/
9753     static void
9754 f_getwinposy(argvars, rettv)
9755     typval_T	*argvars;
9756     typval_T	*rettv;
9757 {
9758     rettv->vval.v_number = -1;
9759 #ifdef FEAT_GUI
9760     if (gui.in_use)
9761     {
9762 	int	    x, y;
9763 
9764 	if (gui_mch_get_winpos(&x, &y) == OK)
9765 	    rettv->vval.v_number = y;
9766     }
9767 #endif
9768 }
9769 
9770 static win_T *find_win_by_nr __ARGS((typval_T *vp));
9771 
9772     static win_T *
9773 find_win_by_nr(vp)
9774     typval_T	*vp;
9775 {
9776 #ifdef FEAT_WINDOWS
9777     win_T	*wp;
9778 #endif
9779     int		nr;
9780 
9781     nr = get_tv_number_chk(vp, NULL);
9782 
9783 #ifdef FEAT_WINDOWS
9784     if (nr < 0)
9785 	return NULL;
9786     if (nr == 0)
9787 	return curwin;
9788 
9789     for (wp = firstwin; wp != NULL; wp = wp->w_next)
9790 	if (--nr <= 0)
9791 	    break;
9792     return wp;
9793 #else
9794     if (nr == 0 || nr == 1)
9795 	return curwin;
9796     return NULL;
9797 #endif
9798 }
9799 
9800 /*
9801  * "getwinvar()" function
9802  */
9803     static void
9804 f_getwinvar(argvars, rettv)
9805     typval_T	*argvars;
9806     typval_T	*rettv;
9807 {
9808     win_T	*win, *oldcurwin;
9809     char_u	*varname;
9810     dictitem_T	*v;
9811 
9812     win = find_win_by_nr(&argvars[0]);
9813     varname = get_tv_string_chk(&argvars[1]);
9814     ++emsg_off;
9815 
9816     rettv->v_type = VAR_STRING;
9817     rettv->vval.v_string = NULL;
9818 
9819     if (win != NULL && varname != NULL)
9820     {
9821 	if (*varname == '&')	/* window-local-option */
9822 	{
9823 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
9824 	     * that we can get buffer-local options. */
9825 	    oldcurwin = curwin;
9826 	    curwin = win;
9827 	    curbuf = win->w_buffer;
9828 
9829 	    get_option_tv(&varname, rettv, 1);
9830 
9831 	    /* restore previous notion of curwin */
9832 	    curwin = oldcurwin;
9833 	    curbuf = curwin->w_buffer;
9834 	}
9835 	else
9836 	{
9837 	    if (*varname == NUL)
9838 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
9839 		 * scope prefix before the NUL byte is required by
9840 		 * find_var_in_ht(). */
9841 		varname = (char_u *)"w:" + 2;
9842 	    /* look up the variable */
9843 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
9844 	    if (v != NULL)
9845 		copy_tv(&v->di_tv, rettv);
9846 	}
9847     }
9848 
9849     --emsg_off;
9850 }
9851 
9852 /*
9853  * "glob()" function
9854  */
9855     static void
9856 f_glob(argvars, rettv)
9857     typval_T	*argvars;
9858     typval_T	*rettv;
9859 {
9860     expand_T	xpc;
9861 
9862     ExpandInit(&xpc);
9863     xpc.xp_context = EXPAND_FILES;
9864     rettv->v_type = VAR_STRING;
9865     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
9866 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
9867     ExpandCleanup(&xpc);
9868 }
9869 
9870 /*
9871  * "globpath()" function
9872  */
9873     static void
9874 f_globpath(argvars, rettv)
9875     typval_T	*argvars;
9876     typval_T	*rettv;
9877 {
9878     char_u	buf1[NUMBUFLEN];
9879     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
9880 
9881     rettv->v_type = VAR_STRING;
9882     if (file == NULL)
9883 	rettv->vval.v_string = NULL;
9884     else
9885 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
9886 }
9887 
9888 /*
9889  * "has()" function
9890  */
9891     static void
9892 f_has(argvars, rettv)
9893     typval_T	*argvars;
9894     typval_T	*rettv;
9895 {
9896     int		i;
9897     char_u	*name;
9898     int		n = FALSE;
9899     static char	*(has_list[]) =
9900     {
9901 #ifdef AMIGA
9902 	"amiga",
9903 # ifdef FEAT_ARP
9904 	"arp",
9905 # endif
9906 #endif
9907 #ifdef __BEOS__
9908 	"beos",
9909 #endif
9910 #ifdef MSDOS
9911 # ifdef DJGPP
9912 	"dos32",
9913 # else
9914 	"dos16",
9915 # endif
9916 #endif
9917 #ifdef MACOS /* TODO: Should we add MACOS_CLASSIC, MACOS_X? (Dany) */
9918 	"mac",
9919 #endif
9920 #if defined(MACOS_X_UNIX)
9921 	"macunix",
9922 #endif
9923 #ifdef OS2
9924 	"os2",
9925 #endif
9926 #ifdef __QNX__
9927 	"qnx",
9928 #endif
9929 #ifdef RISCOS
9930 	"riscos",
9931 #endif
9932 #ifdef UNIX
9933 	"unix",
9934 #endif
9935 #ifdef VMS
9936 	"vms",
9937 #endif
9938 #ifdef WIN16
9939 	"win16",
9940 #endif
9941 #ifdef WIN32
9942 	"win32",
9943 #endif
9944 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
9945 	"win32unix",
9946 #endif
9947 #ifdef WIN64
9948 	"win64",
9949 #endif
9950 #ifdef EBCDIC
9951 	"ebcdic",
9952 #endif
9953 #ifndef CASE_INSENSITIVE_FILENAME
9954 	"fname_case",
9955 #endif
9956 #ifdef FEAT_ARABIC
9957 	"arabic",
9958 #endif
9959 #ifdef FEAT_AUTOCMD
9960 	"autocmd",
9961 #endif
9962 #ifdef FEAT_BEVAL
9963 	"balloon_eval",
9964 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
9965 	"balloon_multiline",
9966 # endif
9967 #endif
9968 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
9969 	"builtin_terms",
9970 # ifdef ALL_BUILTIN_TCAPS
9971 	"all_builtin_terms",
9972 # endif
9973 #endif
9974 #ifdef FEAT_BYTEOFF
9975 	"byte_offset",
9976 #endif
9977 #ifdef FEAT_CINDENT
9978 	"cindent",
9979 #endif
9980 #ifdef FEAT_CLIENTSERVER
9981 	"clientserver",
9982 #endif
9983 #ifdef FEAT_CLIPBOARD
9984 	"clipboard",
9985 #endif
9986 #ifdef FEAT_CMDL_COMPL
9987 	"cmdline_compl",
9988 #endif
9989 #ifdef FEAT_CMDHIST
9990 	"cmdline_hist",
9991 #endif
9992 #ifdef FEAT_COMMENTS
9993 	"comments",
9994 #endif
9995 #ifdef FEAT_CRYPT
9996 	"cryptv",
9997 #endif
9998 #ifdef FEAT_CSCOPE
9999 	"cscope",
10000 #endif
10001 #ifdef DEBUG
10002 	"debug",
10003 #endif
10004 #ifdef FEAT_CON_DIALOG
10005 	"dialog_con",
10006 #endif
10007 #ifdef FEAT_GUI_DIALOG
10008 	"dialog_gui",
10009 #endif
10010 #ifdef FEAT_DIFF
10011 	"diff",
10012 #endif
10013 #ifdef FEAT_DIGRAPHS
10014 	"digraphs",
10015 #endif
10016 #ifdef FEAT_DND
10017 	"dnd",
10018 #endif
10019 #ifdef FEAT_EMACS_TAGS
10020 	"emacs_tags",
10021 #endif
10022 	"eval",	    /* always present, of course! */
10023 #ifdef FEAT_EX_EXTRA
10024 	"ex_extra",
10025 #endif
10026 #ifdef FEAT_SEARCH_EXTRA
10027 	"extra_search",
10028 #endif
10029 #ifdef FEAT_FKMAP
10030 	"farsi",
10031 #endif
10032 #ifdef FEAT_SEARCHPATH
10033 	"file_in_path",
10034 #endif
10035 #if defined(UNIX) && !defined(USE_SYSTEM)
10036 	"filterpipe",
10037 #endif
10038 #ifdef FEAT_FIND_ID
10039 	"find_in_path",
10040 #endif
10041 #ifdef FEAT_FOLDING
10042 	"folding",
10043 #endif
10044 #ifdef FEAT_FOOTER
10045 	"footer",
10046 #endif
10047 #if !defined(USE_SYSTEM) && defined(UNIX)
10048 	"fork",
10049 #endif
10050 #ifdef FEAT_GETTEXT
10051 	"gettext",
10052 #endif
10053 #ifdef FEAT_GUI
10054 	"gui",
10055 #endif
10056 #ifdef FEAT_GUI_ATHENA
10057 # ifdef FEAT_GUI_NEXTAW
10058 	"gui_neXtaw",
10059 # else
10060 	"gui_athena",
10061 # endif
10062 #endif
10063 #ifdef FEAT_GUI_KDE
10064 	"gui_kde",
10065 #endif
10066 #ifdef FEAT_GUI_GTK
10067 	"gui_gtk",
10068 # ifdef HAVE_GTK2
10069 	"gui_gtk2",
10070 # endif
10071 #endif
10072 #ifdef FEAT_GUI_MAC
10073 	"gui_mac",
10074 #endif
10075 #ifdef FEAT_GUI_MOTIF
10076 	"gui_motif",
10077 #endif
10078 #ifdef FEAT_GUI_PHOTON
10079 	"gui_photon",
10080 #endif
10081 #ifdef FEAT_GUI_W16
10082 	"gui_win16",
10083 #endif
10084 #ifdef FEAT_GUI_W32
10085 	"gui_win32",
10086 #endif
10087 #ifdef FEAT_HANGULIN
10088 	"hangul_input",
10089 #endif
10090 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10091 	"iconv",
10092 #endif
10093 #ifdef FEAT_INS_EXPAND
10094 	"insert_expand",
10095 #endif
10096 #ifdef FEAT_JUMPLIST
10097 	"jumplist",
10098 #endif
10099 #ifdef FEAT_KEYMAP
10100 	"keymap",
10101 #endif
10102 #ifdef FEAT_LANGMAP
10103 	"langmap",
10104 #endif
10105 #ifdef FEAT_LIBCALL
10106 	"libcall",
10107 #endif
10108 #ifdef FEAT_LINEBREAK
10109 	"linebreak",
10110 #endif
10111 #ifdef FEAT_LISP
10112 	"lispindent",
10113 #endif
10114 #ifdef FEAT_LISTCMDS
10115 	"listcmds",
10116 #endif
10117 #ifdef FEAT_LOCALMAP
10118 	"localmap",
10119 #endif
10120 #ifdef FEAT_MENU
10121 	"menu",
10122 #endif
10123 #ifdef FEAT_SESSION
10124 	"mksession",
10125 #endif
10126 #ifdef FEAT_MODIFY_FNAME
10127 	"modify_fname",
10128 #endif
10129 #ifdef FEAT_MOUSE
10130 	"mouse",
10131 #endif
10132 #ifdef FEAT_MOUSESHAPE
10133 	"mouseshape",
10134 #endif
10135 #if defined(UNIX) || defined(VMS)
10136 # ifdef FEAT_MOUSE_DEC
10137 	"mouse_dec",
10138 # endif
10139 # ifdef FEAT_MOUSE_GPM
10140 	"mouse_gpm",
10141 # endif
10142 # ifdef FEAT_MOUSE_JSB
10143 	"mouse_jsbterm",
10144 # endif
10145 # ifdef FEAT_MOUSE_NET
10146 	"mouse_netterm",
10147 # endif
10148 # ifdef FEAT_MOUSE_PTERM
10149 	"mouse_pterm",
10150 # endif
10151 # ifdef FEAT_MOUSE_XTERM
10152 	"mouse_xterm",
10153 # endif
10154 #endif
10155 #ifdef FEAT_MBYTE
10156 	"multi_byte",
10157 #endif
10158 #ifdef FEAT_MBYTE_IME
10159 	"multi_byte_ime",
10160 #endif
10161 #ifdef FEAT_MULTI_LANG
10162 	"multi_lang",
10163 #endif
10164 #ifdef FEAT_MZSCHEME
10165 #ifndef DYNAMIC_MZSCHEME
10166 	"mzscheme",
10167 #endif
10168 #endif
10169 #ifdef FEAT_OLE
10170 	"ole",
10171 #endif
10172 #ifdef FEAT_OSFILETYPE
10173 	"osfiletype",
10174 #endif
10175 #ifdef FEAT_PATH_EXTRA
10176 	"path_extra",
10177 #endif
10178 #ifdef FEAT_PERL
10179 #ifndef DYNAMIC_PERL
10180 	"perl",
10181 #endif
10182 #endif
10183 #ifdef FEAT_PYTHON
10184 #ifndef DYNAMIC_PYTHON
10185 	"python",
10186 #endif
10187 #endif
10188 #ifdef FEAT_POSTSCRIPT
10189 	"postscript",
10190 #endif
10191 #ifdef FEAT_PRINTER
10192 	"printer",
10193 #endif
10194 #ifdef FEAT_PROFILE
10195 	"profile",
10196 #endif
10197 #ifdef FEAT_QUICKFIX
10198 	"quickfix",
10199 #endif
10200 #ifdef FEAT_RIGHTLEFT
10201 	"rightleft",
10202 #endif
10203 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10204 	"ruby",
10205 #endif
10206 #ifdef FEAT_SCROLLBIND
10207 	"scrollbind",
10208 #endif
10209 #ifdef FEAT_CMDL_INFO
10210 	"showcmd",
10211 	"cmdline_info",
10212 #endif
10213 #ifdef FEAT_SIGNS
10214 	"signs",
10215 #endif
10216 #ifdef FEAT_SMARTINDENT
10217 	"smartindent",
10218 #endif
10219 #ifdef FEAT_SNIFF
10220 	"sniff",
10221 #endif
10222 #ifdef FEAT_STL_OPT
10223 	"statusline",
10224 #endif
10225 #ifdef FEAT_SUN_WORKSHOP
10226 	"sun_workshop",
10227 #endif
10228 #ifdef FEAT_NETBEANS_INTG
10229 	"netbeans_intg",
10230 #endif
10231 #ifdef FEAT_SYN_HL
10232 	"spell",
10233 #endif
10234 #ifdef FEAT_SYN_HL
10235 	"syntax",
10236 #endif
10237 #if defined(USE_SYSTEM) || !defined(UNIX)
10238 	"system",
10239 #endif
10240 #ifdef FEAT_TAG_BINS
10241 	"tag_binary",
10242 #endif
10243 #ifdef FEAT_TAG_OLDSTATIC
10244 	"tag_old_static",
10245 #endif
10246 #ifdef FEAT_TAG_ANYWHITE
10247 	"tag_any_white",
10248 #endif
10249 #ifdef FEAT_TCL
10250 # ifndef DYNAMIC_TCL
10251 	"tcl",
10252 # endif
10253 #endif
10254 #ifdef TERMINFO
10255 	"terminfo",
10256 #endif
10257 #ifdef FEAT_TERMRESPONSE
10258 	"termresponse",
10259 #endif
10260 #ifdef FEAT_TEXTOBJ
10261 	"textobjects",
10262 #endif
10263 #ifdef HAVE_TGETENT
10264 	"tgetent",
10265 #endif
10266 #ifdef FEAT_TITLE
10267 	"title",
10268 #endif
10269 #ifdef FEAT_TOOLBAR
10270 	"toolbar",
10271 #endif
10272 #ifdef FEAT_USR_CMDS
10273 	"user-commands",    /* was accidentally included in 5.4 */
10274 	"user_commands",
10275 #endif
10276 #ifdef FEAT_VIMINFO
10277 	"viminfo",
10278 #endif
10279 #ifdef FEAT_VERTSPLIT
10280 	"vertsplit",
10281 #endif
10282 #ifdef FEAT_VIRTUALEDIT
10283 	"virtualedit",
10284 #endif
10285 #ifdef FEAT_VISUAL
10286 	"visual",
10287 #endif
10288 #ifdef FEAT_VISUALEXTRA
10289 	"visualextra",
10290 #endif
10291 #ifdef FEAT_VREPLACE
10292 	"vreplace",
10293 #endif
10294 #ifdef FEAT_WILDIGN
10295 	"wildignore",
10296 #endif
10297 #ifdef FEAT_WILDMENU
10298 	"wildmenu",
10299 #endif
10300 #ifdef FEAT_WINDOWS
10301 	"windows",
10302 #endif
10303 #ifdef FEAT_WAK
10304 	"winaltkeys",
10305 #endif
10306 #ifdef FEAT_WRITEBACKUP
10307 	"writebackup",
10308 #endif
10309 #ifdef FEAT_XIM
10310 	"xim",
10311 #endif
10312 #ifdef FEAT_XFONTSET
10313 	"xfontset",
10314 #endif
10315 #ifdef USE_XSMP
10316 	"xsmp",
10317 #endif
10318 #ifdef USE_XSMP_INTERACT
10319 	"xsmp_interact",
10320 #endif
10321 #ifdef FEAT_XCLIPBOARD
10322 	"xterm_clipboard",
10323 #endif
10324 #ifdef FEAT_XTERM_SAVE
10325 	"xterm_save",
10326 #endif
10327 #if defined(UNIX) && defined(FEAT_X11)
10328 	"X11",
10329 #endif
10330 	NULL
10331     };
10332 
10333     name = get_tv_string(&argvars[0]);
10334     for (i = 0; has_list[i] != NULL; ++i)
10335 	if (STRICMP(name, has_list[i]) == 0)
10336 	{
10337 	    n = TRUE;
10338 	    break;
10339 	}
10340 
10341     if (n == FALSE)
10342     {
10343 	if (STRNICMP(name, "patch", 5) == 0)
10344 	    n = has_patch(atoi((char *)name + 5));
10345 	else if (STRICMP(name, "vim_starting") == 0)
10346 	    n = (starting != 0);
10347 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10348 	else if (STRICMP(name, "balloon_multiline") == 0)
10349 	    n = multiline_balloon_available();
10350 #endif
10351 #ifdef DYNAMIC_TCL
10352 	else if (STRICMP(name, "tcl") == 0)
10353 	    n = tcl_enabled(FALSE);
10354 #endif
10355 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10356 	else if (STRICMP(name, "iconv") == 0)
10357 	    n = iconv_enabled(FALSE);
10358 #endif
10359 #ifdef DYNAMIC_MZSCHEME
10360 	else if (STRICMP(name, "mzscheme") == 0)
10361 	    n = mzscheme_enabled(FALSE);
10362 #endif
10363 #ifdef DYNAMIC_RUBY
10364 	else if (STRICMP(name, "ruby") == 0)
10365 	    n = ruby_enabled(FALSE);
10366 #endif
10367 #ifdef DYNAMIC_PYTHON
10368 	else if (STRICMP(name, "python") == 0)
10369 	    n = python_enabled(FALSE);
10370 #endif
10371 #ifdef DYNAMIC_PERL
10372 	else if (STRICMP(name, "perl") == 0)
10373 	    n = perl_enabled(FALSE);
10374 #endif
10375 #ifdef FEAT_GUI
10376 	else if (STRICMP(name, "gui_running") == 0)
10377 	    n = (gui.in_use || gui.starting);
10378 # ifdef FEAT_GUI_W32
10379 	else if (STRICMP(name, "gui_win32s") == 0)
10380 	    n = gui_is_win32s();
10381 # endif
10382 # ifdef FEAT_BROWSE
10383 	else if (STRICMP(name, "browse") == 0)
10384 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10385 # endif
10386 #endif
10387 #ifdef FEAT_SYN_HL
10388 	else if (STRICMP(name, "syntax_items") == 0)
10389 	    n = syntax_present(curbuf);
10390 #endif
10391 #if defined(WIN3264)
10392 	else if (STRICMP(name, "win95") == 0)
10393 	    n = mch_windows95();
10394 #endif
10395 #ifdef FEAT_NETBEANS_INTG
10396 	else if (STRICMP(name, "netbeans_enabled") == 0)
10397 	    n = usingNetbeans;
10398 #endif
10399     }
10400 
10401     rettv->vval.v_number = n;
10402 }
10403 
10404 /*
10405  * "has_key()" function
10406  */
10407     static void
10408 f_has_key(argvars, rettv)
10409     typval_T	*argvars;
10410     typval_T	*rettv;
10411 {
10412     rettv->vval.v_number = 0;
10413     if (argvars[0].v_type != VAR_DICT)
10414     {
10415 	EMSG(_(e_dictreq));
10416 	return;
10417     }
10418     if (argvars[0].vval.v_dict == NULL)
10419 	return;
10420 
10421     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10422 				      get_tv_string(&argvars[1]), -1) != NULL;
10423 }
10424 
10425 /*
10426  * "hasmapto()" function
10427  */
10428     static void
10429 f_hasmapto(argvars, rettv)
10430     typval_T	*argvars;
10431     typval_T	*rettv;
10432 {
10433     char_u	*name;
10434     char_u	*mode;
10435     char_u	buf[NUMBUFLEN];
10436 
10437     name = get_tv_string(&argvars[0]);
10438     if (argvars[1].v_type == VAR_UNKNOWN)
10439 	mode = (char_u *)"nvo";
10440     else
10441 	mode = get_tv_string_buf(&argvars[1], buf);
10442 
10443     if (map_to_exists(name, mode))
10444 	rettv->vval.v_number = TRUE;
10445     else
10446 	rettv->vval.v_number = FALSE;
10447 }
10448 
10449 /*
10450  * "histadd()" function
10451  */
10452 /*ARGSUSED*/
10453     static void
10454 f_histadd(argvars, rettv)
10455     typval_T	*argvars;
10456     typval_T	*rettv;
10457 {
10458 #ifdef FEAT_CMDHIST
10459     int		histype;
10460     char_u	*str;
10461     char_u	buf[NUMBUFLEN];
10462 #endif
10463 
10464     rettv->vval.v_number = FALSE;
10465     if (check_restricted() || check_secure())
10466 	return;
10467 #ifdef FEAT_CMDHIST
10468     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10469     histype = str != NULL ? get_histtype(str) : -1;
10470     if (histype >= 0)
10471     {
10472 	str = get_tv_string_buf(&argvars[1], buf);
10473 	if (*str != NUL)
10474 	{
10475 	    add_to_history(histype, str, FALSE, NUL);
10476 	    rettv->vval.v_number = TRUE;
10477 	    return;
10478 	}
10479     }
10480 #endif
10481 }
10482 
10483 /*
10484  * "histdel()" function
10485  */
10486 /*ARGSUSED*/
10487     static void
10488 f_histdel(argvars, rettv)
10489     typval_T	*argvars;
10490     typval_T	*rettv;
10491 {
10492 #ifdef FEAT_CMDHIST
10493     int		n;
10494     char_u	buf[NUMBUFLEN];
10495     char_u	*str;
10496 
10497     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10498     if (str == NULL)
10499 	n = 0;
10500     else if (argvars[1].v_type == VAR_UNKNOWN)
10501 	/* only one argument: clear entire history */
10502 	n = clr_history(get_histtype(str));
10503     else if (argvars[1].v_type == VAR_NUMBER)
10504 	/* index given: remove that entry */
10505 	n = del_history_idx(get_histtype(str),
10506 					  (int)get_tv_number(&argvars[1]));
10507     else
10508 	/* string given: remove all matching entries */
10509 	n = del_history_entry(get_histtype(str),
10510 				      get_tv_string_buf(&argvars[1], buf));
10511     rettv->vval.v_number = n;
10512 #else
10513     rettv->vval.v_number = 0;
10514 #endif
10515 }
10516 
10517 /*
10518  * "histget()" function
10519  */
10520 /*ARGSUSED*/
10521     static void
10522 f_histget(argvars, rettv)
10523     typval_T	*argvars;
10524     typval_T	*rettv;
10525 {
10526 #ifdef FEAT_CMDHIST
10527     int		type;
10528     int		idx;
10529     char_u	*str;
10530 
10531     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10532     if (str == NULL)
10533 	rettv->vval.v_string = NULL;
10534     else
10535     {
10536 	type = get_histtype(str);
10537 	if (argvars[1].v_type == VAR_UNKNOWN)
10538 	    idx = get_history_idx(type);
10539 	else
10540 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10541 						    /* -1 on type error */
10542 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10543     }
10544 #else
10545     rettv->vval.v_string = NULL;
10546 #endif
10547     rettv->v_type = VAR_STRING;
10548 }
10549 
10550 /*
10551  * "histnr()" function
10552  */
10553 /*ARGSUSED*/
10554     static void
10555 f_histnr(argvars, rettv)
10556     typval_T	*argvars;
10557     typval_T	*rettv;
10558 {
10559     int		i;
10560 
10561 #ifdef FEAT_CMDHIST
10562     char_u	*history = get_tv_string_chk(&argvars[0]);
10563 
10564     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10565     if (i >= HIST_CMD && i < HIST_COUNT)
10566 	i = get_history_idx(i);
10567     else
10568 #endif
10569 	i = -1;
10570     rettv->vval.v_number = i;
10571 }
10572 
10573 /*
10574  * "highlightID(name)" function
10575  */
10576     static void
10577 f_hlID(argvars, rettv)
10578     typval_T	*argvars;
10579     typval_T	*rettv;
10580 {
10581     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10582 }
10583 
10584 /*
10585  * "highlight_exists()" function
10586  */
10587     static void
10588 f_hlexists(argvars, rettv)
10589     typval_T	*argvars;
10590     typval_T	*rettv;
10591 {
10592     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10593 }
10594 
10595 /*
10596  * "hostname()" function
10597  */
10598 /*ARGSUSED*/
10599     static void
10600 f_hostname(argvars, rettv)
10601     typval_T	*argvars;
10602     typval_T	*rettv;
10603 {
10604     char_u hostname[256];
10605 
10606     mch_get_host_name(hostname, 256);
10607     rettv->v_type = VAR_STRING;
10608     rettv->vval.v_string = vim_strsave(hostname);
10609 }
10610 
10611 /*
10612  * iconv() function
10613  */
10614 /*ARGSUSED*/
10615     static void
10616 f_iconv(argvars, rettv)
10617     typval_T	*argvars;
10618     typval_T	*rettv;
10619 {
10620 #ifdef FEAT_MBYTE
10621     char_u	buf1[NUMBUFLEN];
10622     char_u	buf2[NUMBUFLEN];
10623     char_u	*from, *to, *str;
10624     vimconv_T	vimconv;
10625 #endif
10626 
10627     rettv->v_type = VAR_STRING;
10628     rettv->vval.v_string = NULL;
10629 
10630 #ifdef FEAT_MBYTE
10631     str = get_tv_string(&argvars[0]);
10632     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10633     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10634     vimconv.vc_type = CONV_NONE;
10635     convert_setup(&vimconv, from, to);
10636 
10637     /* If the encodings are equal, no conversion needed. */
10638     if (vimconv.vc_type == CONV_NONE)
10639 	rettv->vval.v_string = vim_strsave(str);
10640     else
10641 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10642 
10643     convert_setup(&vimconv, NULL, NULL);
10644     vim_free(from);
10645     vim_free(to);
10646 #endif
10647 }
10648 
10649 /*
10650  * "indent()" function
10651  */
10652     static void
10653 f_indent(argvars, rettv)
10654     typval_T	*argvars;
10655     typval_T	*rettv;
10656 {
10657     linenr_T	lnum;
10658 
10659     lnum = get_tv_lnum(argvars);
10660     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10661 	rettv->vval.v_number = get_indent_lnum(lnum);
10662     else
10663 	rettv->vval.v_number = -1;
10664 }
10665 
10666 /*
10667  * "index()" function
10668  */
10669     static void
10670 f_index(argvars, rettv)
10671     typval_T	*argvars;
10672     typval_T	*rettv;
10673 {
10674     list_T	*l;
10675     listitem_T	*item;
10676     long	idx = 0;
10677     int		ic = FALSE;
10678 
10679     rettv->vval.v_number = -1;
10680     if (argvars[0].v_type != VAR_LIST)
10681     {
10682 	EMSG(_(e_listreq));
10683 	return;
10684     }
10685     l = argvars[0].vval.v_list;
10686     if (l != NULL)
10687     {
10688 	item = l->lv_first;
10689 	if (argvars[2].v_type != VAR_UNKNOWN)
10690 	{
10691 	    int		error = FALSE;
10692 
10693 	    /* Start at specified item.  Use the cached index that list_find()
10694 	     * sets, so that a negative number also works. */
10695 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10696 	    idx = l->lv_idx;
10697 	    if (argvars[3].v_type != VAR_UNKNOWN)
10698 		ic = get_tv_number_chk(&argvars[3], &error);
10699 	    if (error)
10700 		item = NULL;
10701 	}
10702 
10703 	for ( ; item != NULL; item = item->li_next, ++idx)
10704 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10705 	    {
10706 		rettv->vval.v_number = idx;
10707 		break;
10708 	    }
10709     }
10710 }
10711 
10712 static int inputsecret_flag = 0;
10713 
10714 /*
10715  * "input()" function
10716  *     Also handles inputsecret() when inputsecret is set.
10717  */
10718     static void
10719 f_input(argvars, rettv)
10720     typval_T	*argvars;
10721     typval_T	*rettv;
10722 {
10723     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10724     char_u	*p = NULL;
10725     int		c;
10726     char_u	buf[NUMBUFLEN];
10727     int		cmd_silent_save = cmd_silent;
10728     char_u	*defstr = (char_u *)"";
10729 
10730     rettv->v_type = VAR_STRING;
10731 
10732 #ifdef NO_CONSOLE_INPUT
10733     /* While starting up, there is no place to enter text. */
10734     if (no_console_input())
10735     {
10736 	rettv->vval.v_string = NULL;
10737 	return;
10738     }
10739 #endif
10740 
10741     cmd_silent = FALSE;		/* Want to see the prompt. */
10742     if (prompt != NULL)
10743     {
10744 	/* Only the part of the message after the last NL is considered as
10745 	 * prompt for the command line */
10746 	p = vim_strrchr(prompt, '\n');
10747 	if (p == NULL)
10748 	    p = prompt;
10749 	else
10750 	{
10751 	    ++p;
10752 	    c = *p;
10753 	    *p = NUL;
10754 	    msg_start();
10755 	    msg_clr_eos();
10756 	    msg_puts_attr(prompt, echo_attr);
10757 	    msg_didout = FALSE;
10758 	    msg_starthere();
10759 	    *p = c;
10760 	}
10761 	cmdline_row = msg_row;
10762 
10763 	if (argvars[1].v_type != VAR_UNKNOWN)
10764 	{
10765 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10766 	    if (defstr != NULL)
10767 		stuffReadbuffSpec(defstr);
10768 	}
10769 
10770 	if (defstr != NULL)
10771 	    rettv->vval.v_string =
10772 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr);
10773 
10774 	/* since the user typed this, no need to wait for return */
10775 	need_wait_return = FALSE;
10776 	msg_didout = FALSE;
10777     }
10778     cmd_silent = cmd_silent_save;
10779 }
10780 
10781 /*
10782  * "inputdialog()" function
10783  */
10784     static void
10785 f_inputdialog(argvars, rettv)
10786     typval_T	*argvars;
10787     typval_T	*rettv;
10788 {
10789 #if defined(FEAT_GUI_TEXTDIALOG)
10790     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10791     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10792     {
10793 	char_u	*message;
10794 	char_u	buf[NUMBUFLEN];
10795 	char_u	*defstr = (char_u *)"";
10796 
10797 	message = get_tv_string_chk(&argvars[0]);
10798 	if (argvars[1].v_type != VAR_UNKNOWN
10799 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10800 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10801 	else
10802 	    IObuff[0] = NUL;
10803 	if (message != NULL && defstr != NULL
10804 		&& do_dialog(VIM_QUESTION, NULL, message,
10805 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10806 	    rettv->vval.v_string = vim_strsave(IObuff);
10807 	else
10808 	{
10809 	    if (message != NULL && defstr != NULL
10810 					&& argvars[1].v_type != VAR_UNKNOWN
10811 					&& argvars[2].v_type != VAR_UNKNOWN)
10812 		rettv->vval.v_string = vim_strsave(
10813 				      get_tv_string_buf(&argvars[2], buf));
10814 	    else
10815 		rettv->vval.v_string = NULL;
10816 	}
10817 	rettv->v_type = VAR_STRING;
10818     }
10819     else
10820 #endif
10821 	f_input(argvars, rettv);
10822 }
10823 
10824 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10825 
10826 /*
10827  * "inputrestore()" function
10828  */
10829 /*ARGSUSED*/
10830     static void
10831 f_inputrestore(argvars, rettv)
10832     typval_T	*argvars;
10833     typval_T	*rettv;
10834 {
10835     if (ga_userinput.ga_len > 0)
10836     {
10837 	--ga_userinput.ga_len;
10838 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10839 						       + ga_userinput.ga_len);
10840 	rettv->vval.v_number = 0; /* OK */
10841     }
10842     else if (p_verbose > 1)
10843     {
10844 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
10845 	rettv->vval.v_number = 1; /* Failed */
10846     }
10847 }
10848 
10849 /*
10850  * "inputsave()" function
10851  */
10852 /*ARGSUSED*/
10853     static void
10854 f_inputsave(argvars, rettv)
10855     typval_T	*argvars;
10856     typval_T	*rettv;
10857 {
10858     /* Add an entry to the stack of typehead storage. */
10859     if (ga_grow(&ga_userinput, 1) == OK)
10860     {
10861 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
10862 						       + ga_userinput.ga_len);
10863 	++ga_userinput.ga_len;
10864 	rettv->vval.v_number = 0; /* OK */
10865     }
10866     else
10867 	rettv->vval.v_number = 1; /* Failed */
10868 }
10869 
10870 /*
10871  * "inputsecret()" function
10872  */
10873     static void
10874 f_inputsecret(argvars, rettv)
10875     typval_T	*argvars;
10876     typval_T	*rettv;
10877 {
10878     ++cmdline_star;
10879     ++inputsecret_flag;
10880     f_input(argvars, rettv);
10881     --cmdline_star;
10882     --inputsecret_flag;
10883 }
10884 
10885 /*
10886  * "insert()" function
10887  */
10888     static void
10889 f_insert(argvars, rettv)
10890     typval_T	*argvars;
10891     typval_T	*rettv;
10892 {
10893     long	before = 0;
10894     listitem_T	*item;
10895     list_T	*l;
10896     int		error = FALSE;
10897 
10898     rettv->vval.v_number = 0;
10899     if (argvars[0].v_type != VAR_LIST)
10900 	EMSG2(_(e_listarg), "insert()");
10901     else if ((l = argvars[0].vval.v_list) != NULL
10902 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
10903     {
10904 	if (argvars[2].v_type != VAR_UNKNOWN)
10905 	    before = get_tv_number_chk(&argvars[2], &error);
10906 	if (error)
10907 	    return;		/* type error; errmsg already given */
10908 
10909 	if (before == l->lv_len)
10910 	    item = NULL;
10911 	else
10912 	{
10913 	    item = list_find(l, before);
10914 	    if (item == NULL)
10915 	    {
10916 		EMSGN(_(e_listidx), before);
10917 		l = NULL;
10918 	    }
10919 	}
10920 	if (l != NULL)
10921 	{
10922 	    list_insert_tv(l, &argvars[1], item);
10923 	    copy_tv(&argvars[0], rettv);
10924 	}
10925     }
10926 }
10927 
10928 /*
10929  * "isdirectory()" function
10930  */
10931     static void
10932 f_isdirectory(argvars, rettv)
10933     typval_T	*argvars;
10934     typval_T	*rettv;
10935 {
10936     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
10937 }
10938 
10939 /*
10940  * "islocked()" function
10941  */
10942     static void
10943 f_islocked(argvars, rettv)
10944     typval_T	*argvars;
10945     typval_T	*rettv;
10946 {
10947     lval_T	lv;
10948     char_u	*end;
10949     dictitem_T	*di;
10950 
10951     rettv->vval.v_number = -1;
10952     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
10953 							     FNE_CHECK_START);
10954     if (end != NULL && lv.ll_name != NULL)
10955     {
10956 	if (*end != NUL)
10957 	    EMSG(_(e_trailing));
10958 	else
10959 	{
10960 	    if (lv.ll_tv == NULL)
10961 	    {
10962 		if (check_changedtick(lv.ll_name))
10963 		    rettv->vval.v_number = 1;	    /* always locked */
10964 		else
10965 		{
10966 		    di = find_var(lv.ll_name, NULL);
10967 		    if (di != NULL)
10968 		    {
10969 			/* Consider a variable locked when:
10970 			 * 1. the variable itself is locked
10971 			 * 2. the value of the variable is locked.
10972 			 * 3. the List or Dict value is locked.
10973 			 */
10974 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
10975 						  || tv_islocked(&di->di_tv));
10976 		    }
10977 		}
10978 	    }
10979 	    else if (lv.ll_range)
10980 		EMSG(_("E745: Range not allowed"));
10981 	    else if (lv.ll_newkey != NULL)
10982 		EMSG2(_(e_dictkey), lv.ll_newkey);
10983 	    else if (lv.ll_list != NULL)
10984 		/* List item. */
10985 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
10986 	    else
10987 		/* Dictionary item. */
10988 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
10989 	}
10990     }
10991 
10992     clear_lval(&lv);
10993 }
10994 
10995 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
10996 
10997 /*
10998  * Turn a dict into a list:
10999  * "what" == 0: list of keys
11000  * "what" == 1: list of values
11001  * "what" == 2: list of items
11002  */
11003     static void
11004 dict_list(argvars, rettv, what)
11005     typval_T	*argvars;
11006     typval_T	*rettv;
11007     int		what;
11008 {
11009     list_T	*l;
11010     list_T	*l2;
11011     dictitem_T	*di;
11012     hashitem_T	*hi;
11013     listitem_T	*li;
11014     listitem_T	*li2;
11015     dict_T	*d;
11016     int		todo;
11017 
11018     rettv->vval.v_number = 0;
11019     if (argvars[0].v_type != VAR_DICT)
11020     {
11021 	EMSG(_(e_dictreq));
11022 	return;
11023     }
11024     if ((d = argvars[0].vval.v_dict) == NULL)
11025 	return;
11026 
11027     l = list_alloc();
11028     if (l == NULL)
11029 	return;
11030     rettv->v_type = VAR_LIST;
11031     rettv->vval.v_list = l;
11032     ++l->lv_refcount;
11033 
11034     todo = d->dv_hashtab.ht_used;
11035     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11036     {
11037 	if (!HASHITEM_EMPTY(hi))
11038 	{
11039 	    --todo;
11040 	    di = HI2DI(hi);
11041 
11042 	    li = listitem_alloc();
11043 	    if (li == NULL)
11044 		break;
11045 	    list_append(l, li);
11046 
11047 	    if (what == 0)
11048 	    {
11049 		/* keys() */
11050 		li->li_tv.v_type = VAR_STRING;
11051 		li->li_tv.v_lock = 0;
11052 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11053 	    }
11054 	    else if (what == 1)
11055 	    {
11056 		/* values() */
11057 		copy_tv(&di->di_tv, &li->li_tv);
11058 	    }
11059 	    else
11060 	    {
11061 		/* items() */
11062 		l2 = list_alloc();
11063 		li->li_tv.v_type = VAR_LIST;
11064 		li->li_tv.v_lock = 0;
11065 		li->li_tv.vval.v_list = l2;
11066 		if (l2 == NULL)
11067 		    break;
11068 		++l2->lv_refcount;
11069 
11070 		li2 = listitem_alloc();
11071 		if (li2 == NULL)
11072 		    break;
11073 		list_append(l2, li2);
11074 		li2->li_tv.v_type = VAR_STRING;
11075 		li2->li_tv.v_lock = 0;
11076 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11077 
11078 		li2 = listitem_alloc();
11079 		if (li2 == NULL)
11080 		    break;
11081 		list_append(l2, li2);
11082 		copy_tv(&di->di_tv, &li2->li_tv);
11083 	    }
11084 	}
11085     }
11086 }
11087 
11088 /*
11089  * "items(dict)" function
11090  */
11091     static void
11092 f_items(argvars, rettv)
11093     typval_T	*argvars;
11094     typval_T	*rettv;
11095 {
11096     dict_list(argvars, rettv, 2);
11097 }
11098 
11099 /*
11100  * "join()" function
11101  */
11102     static void
11103 f_join(argvars, rettv)
11104     typval_T	*argvars;
11105     typval_T	*rettv;
11106 {
11107     garray_T	ga;
11108     char_u	*sep;
11109 
11110     rettv->vval.v_number = 0;
11111     if (argvars[0].v_type != VAR_LIST)
11112     {
11113 	EMSG(_(e_listreq));
11114 	return;
11115     }
11116     if (argvars[0].vval.v_list == NULL)
11117 	return;
11118     if (argvars[1].v_type == VAR_UNKNOWN)
11119 	sep = (char_u *)" ";
11120     else
11121 	sep = get_tv_string_chk(&argvars[1]);
11122 
11123     rettv->v_type = VAR_STRING;
11124 
11125     if (sep != NULL)
11126     {
11127 	ga_init2(&ga, (int)sizeof(char), 80);
11128 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11129 	ga_append(&ga, NUL);
11130 	rettv->vval.v_string = (char_u *)ga.ga_data;
11131     }
11132     else
11133 	rettv->vval.v_string = NULL;
11134 }
11135 
11136 /*
11137  * "keys()" function
11138  */
11139     static void
11140 f_keys(argvars, rettv)
11141     typval_T	*argvars;
11142     typval_T	*rettv;
11143 {
11144     dict_list(argvars, rettv, 0);
11145 }
11146 
11147 /*
11148  * "last_buffer_nr()" function.
11149  */
11150 /*ARGSUSED*/
11151     static void
11152 f_last_buffer_nr(argvars, rettv)
11153     typval_T	*argvars;
11154     typval_T	*rettv;
11155 {
11156     int		n = 0;
11157     buf_T	*buf;
11158 
11159     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11160 	if (n < buf->b_fnum)
11161 	    n = buf->b_fnum;
11162 
11163     rettv->vval.v_number = n;
11164 }
11165 
11166 /*
11167  * "len()" function
11168  */
11169     static void
11170 f_len(argvars, rettv)
11171     typval_T	*argvars;
11172     typval_T	*rettv;
11173 {
11174     switch (argvars[0].v_type)
11175     {
11176 	case VAR_STRING:
11177 	case VAR_NUMBER:
11178 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11179 					       get_tv_string(&argvars[0]));
11180 	    break;
11181 	case VAR_LIST:
11182 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11183 	    break;
11184 	case VAR_DICT:
11185 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11186 	    break;
11187 	default:
11188 	    EMSG(_("E701: Invalid type for len()"));
11189 	    break;
11190     }
11191 }
11192 
11193 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11194 
11195     static void
11196 libcall_common(argvars, rettv, type)
11197     typval_T	*argvars;
11198     typval_T	*rettv;
11199     int		type;
11200 {
11201 #ifdef FEAT_LIBCALL
11202     char_u		*string_in;
11203     char_u		**string_result;
11204     int			nr_result;
11205 #endif
11206 
11207     rettv->v_type = type;
11208     if (type == VAR_NUMBER)
11209 	rettv->vval.v_number = 0;
11210     else
11211 	rettv->vval.v_string = NULL;
11212 
11213     if (check_restricted() || check_secure())
11214 	return;
11215 
11216 #ifdef FEAT_LIBCALL
11217     /* The first two args must be strings, otherwise its meaningless */
11218     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11219     {
11220 	string_in = NULL;
11221 	if (argvars[2].v_type == VAR_STRING)
11222 	    string_in = argvars[2].vval.v_string;
11223 	if (type == VAR_NUMBER)
11224 	    string_result = NULL;
11225 	else
11226 	    string_result = &rettv->vval.v_string;
11227 	if (mch_libcall(argvars[0].vval.v_string,
11228 			     argvars[1].vval.v_string,
11229 			     string_in,
11230 			     argvars[2].vval.v_number,
11231 			     string_result,
11232 			     &nr_result) == OK
11233 		&& type == VAR_NUMBER)
11234 	    rettv->vval.v_number = nr_result;
11235     }
11236 #endif
11237 }
11238 
11239 /*
11240  * "libcall()" function
11241  */
11242     static void
11243 f_libcall(argvars, rettv)
11244     typval_T	*argvars;
11245     typval_T	*rettv;
11246 {
11247     libcall_common(argvars, rettv, VAR_STRING);
11248 }
11249 
11250 /*
11251  * "libcallnr()" function
11252  */
11253     static void
11254 f_libcallnr(argvars, rettv)
11255     typval_T	*argvars;
11256     typval_T	*rettv;
11257 {
11258     libcall_common(argvars, rettv, VAR_NUMBER);
11259 }
11260 
11261 /*
11262  * "line(string)" function
11263  */
11264     static void
11265 f_line(argvars, rettv)
11266     typval_T	*argvars;
11267     typval_T	*rettv;
11268 {
11269     linenr_T	lnum = 0;
11270     pos_T	*fp;
11271 
11272     fp = var2fpos(&argvars[0], TRUE);
11273     if (fp != NULL)
11274 	lnum = fp->lnum;
11275     rettv->vval.v_number = lnum;
11276 }
11277 
11278 /*
11279  * "line2byte(lnum)" function
11280  */
11281 /*ARGSUSED*/
11282     static void
11283 f_line2byte(argvars, rettv)
11284     typval_T	*argvars;
11285     typval_T	*rettv;
11286 {
11287 #ifndef FEAT_BYTEOFF
11288     rettv->vval.v_number = -1;
11289 #else
11290     linenr_T	lnum;
11291 
11292     lnum = get_tv_lnum(argvars);
11293     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11294 	rettv->vval.v_number = -1;
11295     else
11296 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11297     if (rettv->vval.v_number >= 0)
11298 	++rettv->vval.v_number;
11299 #endif
11300 }
11301 
11302 /*
11303  * "lispindent(lnum)" function
11304  */
11305     static void
11306 f_lispindent(argvars, rettv)
11307     typval_T	*argvars;
11308     typval_T	*rettv;
11309 {
11310 #ifdef FEAT_LISP
11311     pos_T	pos;
11312     linenr_T	lnum;
11313 
11314     pos = curwin->w_cursor;
11315     lnum = get_tv_lnum(argvars);
11316     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11317     {
11318 	curwin->w_cursor.lnum = lnum;
11319 	rettv->vval.v_number = get_lisp_indent();
11320 	curwin->w_cursor = pos;
11321     }
11322     else
11323 #endif
11324 	rettv->vval.v_number = -1;
11325 }
11326 
11327 /*
11328  * "localtime()" function
11329  */
11330 /*ARGSUSED*/
11331     static void
11332 f_localtime(argvars, rettv)
11333     typval_T	*argvars;
11334     typval_T	*rettv;
11335 {
11336     rettv->vval.v_number = (varnumber_T)time(NULL);
11337 }
11338 
11339 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11340 
11341     static void
11342 get_maparg(argvars, rettv, exact)
11343     typval_T	*argvars;
11344     typval_T	*rettv;
11345     int		exact;
11346 {
11347     char_u	*keys;
11348     char_u	*which;
11349     char_u	buf[NUMBUFLEN];
11350     char_u	*keys_buf = NULL;
11351     char_u	*rhs;
11352     int		mode;
11353     garray_T	ga;
11354 
11355     /* return empty string for failure */
11356     rettv->v_type = VAR_STRING;
11357     rettv->vval.v_string = NULL;
11358 
11359     keys = get_tv_string(&argvars[0]);
11360     if (*keys == NUL)
11361 	return;
11362 
11363     if (argvars[1].v_type != VAR_UNKNOWN)
11364 	which = get_tv_string_buf_chk(&argvars[1], buf);
11365     else
11366 	which = (char_u *)"";
11367     if (which == NULL)
11368 	return;
11369 
11370     mode = get_map_mode(&which, 0);
11371 
11372     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11373     rhs = check_map(keys, mode, exact, FALSE);
11374     vim_free(keys_buf);
11375     if (rhs != NULL)
11376     {
11377 	ga_init(&ga);
11378 	ga.ga_itemsize = 1;
11379 	ga.ga_growsize = 40;
11380 
11381 	while (*rhs != NUL)
11382 	    ga_concat(&ga, str2special(&rhs, FALSE));
11383 
11384 	ga_append(&ga, NUL);
11385 	rettv->vval.v_string = (char_u *)ga.ga_data;
11386     }
11387 }
11388 
11389 /*
11390  * "map()" function
11391  */
11392     static void
11393 f_map(argvars, rettv)
11394     typval_T	*argvars;
11395     typval_T	*rettv;
11396 {
11397     filter_map(argvars, rettv, TRUE);
11398 }
11399 
11400 /*
11401  * "maparg()" function
11402  */
11403     static void
11404 f_maparg(argvars, rettv)
11405     typval_T	*argvars;
11406     typval_T	*rettv;
11407 {
11408     get_maparg(argvars, rettv, TRUE);
11409 }
11410 
11411 /*
11412  * "mapcheck()" function
11413  */
11414     static void
11415 f_mapcheck(argvars, rettv)
11416     typval_T	*argvars;
11417     typval_T	*rettv;
11418 {
11419     get_maparg(argvars, rettv, FALSE);
11420 }
11421 
11422 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11423 
11424     static void
11425 find_some_match(argvars, rettv, type)
11426     typval_T	*argvars;
11427     typval_T	*rettv;
11428     int		type;
11429 {
11430     char_u	*str = NULL;
11431     char_u	*expr = NULL;
11432     char_u	*pat;
11433     regmatch_T	regmatch;
11434     char_u	patbuf[NUMBUFLEN];
11435     char_u	strbuf[NUMBUFLEN];
11436     char_u	*save_cpo;
11437     long	start = 0;
11438     long	nth = 1;
11439     int		match = 0;
11440     list_T	*l = NULL;
11441     listitem_T	*li = NULL;
11442     long	idx = 0;
11443     char_u	*tofree = NULL;
11444 
11445     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11446     save_cpo = p_cpo;
11447     p_cpo = (char_u *)"";
11448 
11449     rettv->vval.v_number = -1;
11450     if (type == 3)
11451     {
11452 	/* return empty list when there are no matches */
11453 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11454 	    goto theend;
11455 	rettv->v_type = VAR_LIST;
11456 	++rettv->vval.v_list->lv_refcount;
11457     }
11458     else if (type == 2)
11459     {
11460 	rettv->v_type = VAR_STRING;
11461 	rettv->vval.v_string = NULL;
11462     }
11463 
11464     if (argvars[0].v_type == VAR_LIST)
11465     {
11466 	if ((l = argvars[0].vval.v_list) == NULL)
11467 	    goto theend;
11468 	li = l->lv_first;
11469     }
11470     else
11471 	expr = str = get_tv_string(&argvars[0]);
11472 
11473     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11474     if (pat == NULL)
11475 	goto theend;
11476 
11477     if (argvars[2].v_type != VAR_UNKNOWN)
11478     {
11479 	int	    error = FALSE;
11480 
11481 	start = get_tv_number_chk(&argvars[2], &error);
11482 	if (error)
11483 	    goto theend;
11484 	if (l != NULL)
11485 	{
11486 	    li = list_find(l, start);
11487 	    if (li == NULL)
11488 		goto theend;
11489 	    idx = l->lv_idx;	/* use the cached index */
11490 	}
11491 	else
11492 	{
11493 	    if (start < 0)
11494 		start = 0;
11495 	    if (start > (long)STRLEN(str))
11496 		goto theend;
11497 	    str += start;
11498 	}
11499 
11500 	if (argvars[3].v_type != VAR_UNKNOWN)
11501 	    nth = get_tv_number_chk(&argvars[3], &error);
11502 	if (error)
11503 	    goto theend;
11504     }
11505 
11506     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11507     if (regmatch.regprog != NULL)
11508     {
11509 	regmatch.rm_ic = p_ic;
11510 
11511 	for (;;)
11512 	{
11513 	    if (l != NULL)
11514 	    {
11515 		if (li == NULL)
11516 		{
11517 		    match = FALSE;
11518 		    break;
11519 		}
11520 		vim_free(tofree);
11521 		str = echo_string(&li->li_tv, &tofree, strbuf);
11522 		if (str == NULL)
11523 		    break;
11524 	    }
11525 
11526 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11527 
11528 	    if (match && --nth <= 0)
11529 		break;
11530 	    if (l == NULL && !match)
11531 		break;
11532 
11533 	    /* Advance to just after the match. */
11534 	    if (l != NULL)
11535 	    {
11536 		li = li->li_next;
11537 		++idx;
11538 	    }
11539 	    else
11540 	    {
11541 #ifdef FEAT_MBYTE
11542 		str = regmatch.startp[0] + mb_ptr2len_check(regmatch.startp[0]);
11543 #else
11544 		str = regmatch.startp[0] + 1;
11545 #endif
11546 	    }
11547 	}
11548 
11549 	if (match)
11550 	{
11551 	    if (type == 3)
11552 	    {
11553 		int i;
11554 
11555 		/* return list with matched string and submatches */
11556 		for (i = 0; i < NSUBEXP; ++i)
11557 		{
11558 		    if (regmatch.endp[i] == NULL)
11559 			break;
11560 		    li = listitem_alloc();
11561 		    if (li == NULL)
11562 			break;
11563 		    li->li_tv.v_type = VAR_STRING;
11564 		    li->li_tv.v_lock = 0;
11565 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11566 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11567 		    list_append(rettv->vval.v_list, li);
11568 		}
11569 	    }
11570 	    else if (type == 2)
11571 	    {
11572 		/* return matched string */
11573 		if (l != NULL)
11574 		    copy_tv(&li->li_tv, rettv);
11575 		else
11576 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11577 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11578 	    }
11579 	    else if (l != NULL)
11580 		rettv->vval.v_number = idx;
11581 	    else
11582 	    {
11583 		if (type != 0)
11584 		    rettv->vval.v_number =
11585 				      (varnumber_T)(regmatch.startp[0] - str);
11586 		else
11587 		    rettv->vval.v_number =
11588 					(varnumber_T)(regmatch.endp[0] - str);
11589 		rettv->vval.v_number += str - expr;
11590 	    }
11591 	}
11592 	vim_free(regmatch.regprog);
11593     }
11594 
11595 theend:
11596     vim_free(tofree);
11597     p_cpo = save_cpo;
11598 }
11599 
11600 /*
11601  * "match()" function
11602  */
11603     static void
11604 f_match(argvars, rettv)
11605     typval_T	*argvars;
11606     typval_T	*rettv;
11607 {
11608     find_some_match(argvars, rettv, 1);
11609 }
11610 
11611 /*
11612  * "matchend()" function
11613  */
11614     static void
11615 f_matchend(argvars, rettv)
11616     typval_T	*argvars;
11617     typval_T	*rettv;
11618 {
11619     find_some_match(argvars, rettv, 0);
11620 }
11621 
11622 /*
11623  * "matchlist()" function
11624  */
11625     static void
11626 f_matchlist(argvars, rettv)
11627     typval_T	*argvars;
11628     typval_T	*rettv;
11629 {
11630     find_some_match(argvars, rettv, 3);
11631 }
11632 
11633 /*
11634  * "matchstr()" function
11635  */
11636     static void
11637 f_matchstr(argvars, rettv)
11638     typval_T	*argvars;
11639     typval_T	*rettv;
11640 {
11641     find_some_match(argvars, rettv, 2);
11642 }
11643 
11644 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11645 
11646     static void
11647 max_min(argvars, rettv, domax)
11648     typval_T	*argvars;
11649     typval_T	*rettv;
11650     int		domax;
11651 {
11652     long	n = 0;
11653     long	i;
11654     int		error = FALSE;
11655 
11656     if (argvars[0].v_type == VAR_LIST)
11657     {
11658 	list_T		*l;
11659 	listitem_T	*li;
11660 
11661 	l = argvars[0].vval.v_list;
11662 	if (l != NULL)
11663 	{
11664 	    li = l->lv_first;
11665 	    if (li != NULL)
11666 	    {
11667 		n = get_tv_number_chk(&li->li_tv, &error);
11668 		for (;;)
11669 		{
11670 		    li = li->li_next;
11671 		    if (li == NULL)
11672 			break;
11673 		    i = get_tv_number_chk(&li->li_tv, &error);
11674 		    if (domax ? i > n : i < n)
11675 			n = i;
11676 		}
11677 	    }
11678 	}
11679     }
11680     else if (argvars[0].v_type == VAR_DICT)
11681     {
11682 	dict_T		*d;
11683 	int		first = TRUE;
11684 	hashitem_T	*hi;
11685 	int		todo;
11686 
11687 	d = argvars[0].vval.v_dict;
11688 	if (d != NULL)
11689 	{
11690 	    todo = d->dv_hashtab.ht_used;
11691 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11692 	    {
11693 		if (!HASHITEM_EMPTY(hi))
11694 		{
11695 		    --todo;
11696 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11697 		    if (first)
11698 		    {
11699 			n = i;
11700 			first = FALSE;
11701 		    }
11702 		    else if (domax ? i > n : i < n)
11703 			n = i;
11704 		}
11705 	    }
11706 	}
11707     }
11708     else
11709 	EMSG(_(e_listdictarg));
11710     rettv->vval.v_number = error ? 0 : n;
11711 }
11712 
11713 /*
11714  * "max()" function
11715  */
11716     static void
11717 f_max(argvars, rettv)
11718     typval_T	*argvars;
11719     typval_T	*rettv;
11720 {
11721     max_min(argvars, rettv, TRUE);
11722 }
11723 
11724 /*
11725  * "min()" function
11726  */
11727     static void
11728 f_min(argvars, rettv)
11729     typval_T	*argvars;
11730     typval_T	*rettv;
11731 {
11732     max_min(argvars, rettv, FALSE);
11733 }
11734 
11735 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11736 
11737 /*
11738  * Create the directory in which "dir" is located, and higher levels when
11739  * needed.
11740  */
11741     static int
11742 mkdir_recurse(dir, prot)
11743     char_u	*dir;
11744     int		prot;
11745 {
11746     char_u	*p;
11747     char_u	*updir;
11748     int		r = FAIL;
11749 
11750     /* Get end of directory name in "dir".
11751      * We're done when it's "/" or "c:/". */
11752     p = gettail_sep(dir);
11753     if (p <= get_past_head(dir))
11754 	return OK;
11755 
11756     /* If the directory exists we're done.  Otherwise: create it.*/
11757     updir = vim_strnsave(dir, (int)(p - dir));
11758     if (updir == NULL)
11759 	return FAIL;
11760     if (mch_isdir(updir))
11761 	r = OK;
11762     else if (mkdir_recurse(updir, prot) == OK)
11763 	r = vim_mkdir_emsg(updir, prot);
11764     vim_free(updir);
11765     return r;
11766 }
11767 
11768 #ifdef vim_mkdir
11769 /*
11770  * "mkdir()" function
11771  */
11772     static void
11773 f_mkdir(argvars, rettv)
11774     typval_T	*argvars;
11775     typval_T	*rettv;
11776 {
11777     char_u	*dir;
11778     char_u	buf[NUMBUFLEN];
11779     int		prot = 0755;
11780 
11781     rettv->vval.v_number = FAIL;
11782     if (check_restricted() || check_secure())
11783 	return;
11784 
11785     dir = get_tv_string_buf(&argvars[0], buf);
11786     if (argvars[1].v_type != VAR_UNKNOWN)
11787     {
11788 	if (argvars[2].v_type != VAR_UNKNOWN)
11789 	    prot = get_tv_number_chk(&argvars[2], NULL);
11790 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11791 	    mkdir_recurse(dir, prot);
11792     }
11793     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11794 }
11795 #endif
11796 
11797 /*
11798  * "mode()" function
11799  */
11800 /*ARGSUSED*/
11801     static void
11802 f_mode(argvars, rettv)
11803     typval_T	*argvars;
11804     typval_T	*rettv;
11805 {
11806     char_u	buf[2];
11807 
11808 #ifdef FEAT_VISUAL
11809     if (VIsual_active)
11810     {
11811 	if (VIsual_select)
11812 	    buf[0] = VIsual_mode + 's' - 'v';
11813 	else
11814 	    buf[0] = VIsual_mode;
11815     }
11816     else
11817 #endif
11818 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11819 	buf[0] = 'r';
11820     else if (State & INSERT)
11821     {
11822 	if (State & REPLACE_FLAG)
11823 	    buf[0] = 'R';
11824 	else
11825 	    buf[0] = 'i';
11826     }
11827     else if (State & CMDLINE)
11828 	buf[0] = 'c';
11829     else
11830 	buf[0] = 'n';
11831 
11832     buf[1] = NUL;
11833     rettv->vval.v_string = vim_strsave(buf);
11834     rettv->v_type = VAR_STRING;
11835 }
11836 
11837 /*
11838  * "nextnonblank()" function
11839  */
11840     static void
11841 f_nextnonblank(argvars, rettv)
11842     typval_T	*argvars;
11843     typval_T	*rettv;
11844 {
11845     linenr_T	lnum;
11846 
11847     for (lnum = get_tv_lnum(argvars); ; ++lnum)
11848     {
11849 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
11850 	{
11851 	    lnum = 0;
11852 	    break;
11853 	}
11854 	if (*skipwhite(ml_get(lnum)) != NUL)
11855 	    break;
11856     }
11857     rettv->vval.v_number = lnum;
11858 }
11859 
11860 /*
11861  * "nr2char()" function
11862  */
11863     static void
11864 f_nr2char(argvars, rettv)
11865     typval_T	*argvars;
11866     typval_T	*rettv;
11867 {
11868     char_u	buf[NUMBUFLEN];
11869 
11870 #ifdef FEAT_MBYTE
11871     if (has_mbyte)
11872 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
11873     else
11874 #endif
11875     {
11876 	buf[0] = (char_u)get_tv_number(&argvars[0]);
11877 	buf[1] = NUL;
11878     }
11879     rettv->v_type = VAR_STRING;
11880     rettv->vval.v_string = vim_strsave(buf);
11881 }
11882 
11883 /*
11884  * "prevnonblank()" function
11885  */
11886     static void
11887 f_prevnonblank(argvars, rettv)
11888     typval_T	*argvars;
11889     typval_T	*rettv;
11890 {
11891     linenr_T	lnum;
11892 
11893     lnum = get_tv_lnum(argvars);
11894     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
11895 	lnum = 0;
11896     else
11897 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
11898 	    --lnum;
11899     rettv->vval.v_number = lnum;
11900 }
11901 
11902 /*
11903  * "printf()" function
11904  */
11905     static void
11906 f_printf(argvars, rettv)
11907     typval_T	*argvars;
11908     typval_T	*rettv;
11909 {
11910     rettv->v_type = VAR_STRING;
11911     rettv->vval.v_string = NULL;
11912 #ifdef HAVE_STDARG_H
11913     {
11914 	char_u	buf[NUMBUFLEN];
11915 	int	len;
11916 	char_u	*s;
11917 	int	saved_did_emsg = did_emsg;
11918 	char	*fmt;
11919 
11920 	/* Get the required length, allocate the buffer and do it for real. */
11921 	did_emsg = FALSE;
11922 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
11923 	len = vim_vsnprintf(NULL, 0, fmt, NULL, argvars + 1);
11924 	if (!did_emsg)
11925 	{
11926 	    s = alloc(len + 1);
11927 	    if (s != NULL)
11928 	    {
11929 		rettv->vval.v_string = s;
11930 		(void)vim_vsnprintf((char *)s, len + 1, fmt, NULL, argvars + 1);
11931 	    }
11932 	}
11933 	did_emsg |= saved_did_emsg;
11934     }
11935 #endif
11936 }
11937 
11938 /*
11939  * "range()" function
11940  */
11941     static void
11942 f_range(argvars, rettv)
11943     typval_T	*argvars;
11944     typval_T	*rettv;
11945 {
11946     long	start;
11947     long	end;
11948     long	stride = 1;
11949     long	i;
11950     list_T	*l;
11951     listitem_T	*li;
11952     int		error = FALSE;
11953 
11954     start = get_tv_number_chk(&argvars[0], &error);
11955     if (argvars[1].v_type == VAR_UNKNOWN)
11956     {
11957 	end = start - 1;
11958 	start = 0;
11959     }
11960     else
11961     {
11962 	end = get_tv_number_chk(&argvars[1], &error);
11963 	if (argvars[2].v_type != VAR_UNKNOWN)
11964 	    stride = get_tv_number_chk(&argvars[2], &error);
11965     }
11966 
11967     rettv->vval.v_number = 0;
11968     if (error)
11969 	return;		/* type error; errmsg already given */
11970     if (stride == 0)
11971 	EMSG(_("E726: Stride is zero"));
11972     else if (stride > 0 ? end + 1 < start : end - 1 > start)
11973 	EMSG(_("E727: Start past end"));
11974     else
11975     {
11976 	l = list_alloc();
11977 	if (l != NULL)
11978 	{
11979 	    rettv->v_type = VAR_LIST;
11980 	    rettv->vval.v_list = l;
11981 	    ++l->lv_refcount;
11982 
11983 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
11984 	    {
11985 		li = listitem_alloc();
11986 		if (li == NULL)
11987 		    break;
11988 		li->li_tv.v_type = VAR_NUMBER;
11989 		li->li_tv.v_lock = 0;
11990 		li->li_tv.vval.v_number = i;
11991 		list_append(l, li);
11992 	    }
11993 	}
11994     }
11995 }
11996 
11997 /*
11998  * "readfile()" function
11999  */
12000     static void
12001 f_readfile(argvars, rettv)
12002     typval_T	*argvars;
12003     typval_T	*rettv;
12004 {
12005     int		binary = FALSE;
12006     char_u	*fname;
12007     FILE	*fd;
12008     list_T	*l;
12009     listitem_T	*li;
12010 #define FREAD_SIZE 200	    /* optimized for text lines */
12011     char_u	buf[FREAD_SIZE];
12012     int		readlen;    /* size of last fread() */
12013     int		buflen;	    /* nr of valid chars in buf[] */
12014     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12015     int		tolist;	    /* first byte in buf[] still to be put in list */
12016     int		chop;	    /* how many CR to chop off */
12017     char_u	*prev = NULL;	/* previously read bytes, if any */
12018     int		prevlen = 0;    /* length of "prev" if not NULL */
12019     char_u	*s;
12020     int		len;
12021     long	maxline = MAXLNUM;
12022     long	cnt = 0;
12023 
12024     if (argvars[1].v_type != VAR_UNKNOWN)
12025     {
12026 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12027 	    binary = TRUE;
12028 	if (argvars[2].v_type != VAR_UNKNOWN)
12029 	    maxline = get_tv_number(&argvars[2]);
12030     }
12031 
12032     l = list_alloc();
12033     if (l == NULL)
12034 	return;
12035     rettv->v_type = VAR_LIST;
12036     rettv->vval.v_list = l;
12037     l->lv_refcount = 1;
12038 
12039     /* Always open the file in binary mode, library functions have a mind of
12040      * their own about CR-LF conversion. */
12041     fname = get_tv_string(&argvars[0]);
12042     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12043     {
12044 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12045 	return;
12046     }
12047 
12048     filtd = 0;
12049     while (cnt < maxline || maxline < 0)
12050     {
12051 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12052 	buflen = filtd + readlen;
12053 	tolist = 0;
12054 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12055 	{
12056 	    if (buf[filtd] == '\n' || readlen <= 0)
12057 	    {
12058 		/* Only when in binary mode add an empty list item when the
12059 		 * last line ends in a '\n'. */
12060 		if (!binary && readlen == 0 && filtd == 0)
12061 		    break;
12062 
12063 		/* Found end-of-line or end-of-file: add a text line to the
12064 		 * list. */
12065 		chop = 0;
12066 		if (!binary)
12067 		    while (filtd - chop - 1 >= tolist
12068 					  && buf[filtd - chop - 1] == '\r')
12069 			++chop;
12070 		len = filtd - tolist - chop;
12071 		if (prev == NULL)
12072 		    s = vim_strnsave(buf + tolist, len);
12073 		else
12074 		{
12075 		    s = alloc((unsigned)(prevlen + len + 1));
12076 		    if (s != NULL)
12077 		    {
12078 			mch_memmove(s, prev, prevlen);
12079 			vim_free(prev);
12080 			prev = NULL;
12081 			mch_memmove(s + prevlen, buf + tolist, len);
12082 			s[prevlen + len] = NUL;
12083 		    }
12084 		}
12085 		tolist = filtd + 1;
12086 
12087 		li = listitem_alloc();
12088 		if (li == NULL)
12089 		{
12090 		    vim_free(s);
12091 		    break;
12092 		}
12093 		li->li_tv.v_type = VAR_STRING;
12094 		li->li_tv.v_lock = 0;
12095 		li->li_tv.vval.v_string = s;
12096 		list_append(l, li);
12097 
12098 		if (++cnt >= maxline && maxline >= 0)
12099 		    break;
12100 		if (readlen <= 0)
12101 		    break;
12102 	    }
12103 	    else if (buf[filtd] == NUL)
12104 		buf[filtd] = '\n';
12105 	}
12106 	if (readlen <= 0)
12107 	    break;
12108 
12109 	if (tolist == 0)
12110 	{
12111 	    /* "buf" is full, need to move text to an allocated buffer */
12112 	    if (prev == NULL)
12113 	    {
12114 		prev = vim_strnsave(buf, buflen);
12115 		prevlen = buflen;
12116 	    }
12117 	    else
12118 	    {
12119 		s = alloc((unsigned)(prevlen + buflen));
12120 		if (s != NULL)
12121 		{
12122 		    mch_memmove(s, prev, prevlen);
12123 		    mch_memmove(s + prevlen, buf, buflen);
12124 		    vim_free(prev);
12125 		    prev = s;
12126 		    prevlen += buflen;
12127 		}
12128 	    }
12129 	    filtd = 0;
12130 	}
12131 	else
12132 	{
12133 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12134 	    filtd -= tolist;
12135 	}
12136     }
12137 
12138     /*
12139      * For a negative line count use only the lines at the end of the file,
12140      * free the rest.
12141      */
12142     if (maxline < 0)
12143 	while (cnt > -maxline)
12144 	{
12145 	    listitem_remove(l, l->lv_first);
12146 	    --cnt;
12147 	}
12148 
12149     vim_free(prev);
12150     fclose(fd);
12151 }
12152 
12153 
12154 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12155 static void make_connection __ARGS((void));
12156 static int check_connection __ARGS((void));
12157 
12158     static void
12159 make_connection()
12160 {
12161     if (X_DISPLAY == NULL
12162 # ifdef FEAT_GUI
12163 	    && !gui.in_use
12164 # endif
12165 	    )
12166     {
12167 	x_force_connect = TRUE;
12168 	setup_term_clip();
12169 	x_force_connect = FALSE;
12170     }
12171 }
12172 
12173     static int
12174 check_connection()
12175 {
12176     make_connection();
12177     if (X_DISPLAY == NULL)
12178     {
12179 	EMSG(_("E240: No connection to Vim server"));
12180 	return FAIL;
12181     }
12182     return OK;
12183 }
12184 #endif
12185 
12186 #ifdef FEAT_CLIENTSERVER
12187 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12188 
12189     static void
12190 remote_common(argvars, rettv, expr)
12191     typval_T	*argvars;
12192     typval_T	*rettv;
12193     int		expr;
12194 {
12195     char_u	*server_name;
12196     char_u	*keys;
12197     char_u	*r = NULL;
12198     char_u	buf[NUMBUFLEN];
12199 # ifdef WIN32
12200     HWND	w;
12201 # else
12202     Window	w;
12203 # endif
12204 
12205     if (check_restricted() || check_secure())
12206 	return;
12207 
12208 # ifdef FEAT_X11
12209     if (check_connection() == FAIL)
12210 	return;
12211 # endif
12212 
12213     server_name = get_tv_string_chk(&argvars[0]);
12214     if (server_name == NULL)
12215 	return;		/* type error; errmsg already given */
12216     keys = get_tv_string_buf(&argvars[1], buf);
12217 # ifdef WIN32
12218     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12219 # else
12220     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12221 									  < 0)
12222 # endif
12223     {
12224 	if (r != NULL)
12225 	    EMSG(r);		/* sending worked but evaluation failed */
12226 	else
12227 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12228 	return;
12229     }
12230 
12231     rettv->vval.v_string = r;
12232 
12233     if (argvars[2].v_type != VAR_UNKNOWN)
12234     {
12235 	dictitem_T	v;
12236 	char_u		str[30];
12237 	char_u		*idvar;
12238 
12239 	sprintf((char *)str, "0x%x", (unsigned int)w);
12240 	v.di_tv.v_type = VAR_STRING;
12241 	v.di_tv.vval.v_string = vim_strsave(str);
12242 	idvar = get_tv_string_chk(&argvars[2]);
12243 	if (idvar != NULL)
12244 	    set_var(idvar, &v.di_tv, FALSE);
12245 	vim_free(v.di_tv.vval.v_string);
12246     }
12247 }
12248 #endif
12249 
12250 /*
12251  * "remote_expr()" function
12252  */
12253 /*ARGSUSED*/
12254     static void
12255 f_remote_expr(argvars, rettv)
12256     typval_T	*argvars;
12257     typval_T	*rettv;
12258 {
12259     rettv->v_type = VAR_STRING;
12260     rettv->vval.v_string = NULL;
12261 #ifdef FEAT_CLIENTSERVER
12262     remote_common(argvars, rettv, TRUE);
12263 #endif
12264 }
12265 
12266 /*
12267  * "remote_foreground()" function
12268  */
12269 /*ARGSUSED*/
12270     static void
12271 f_remote_foreground(argvars, rettv)
12272     typval_T	*argvars;
12273     typval_T	*rettv;
12274 {
12275     rettv->vval.v_number = 0;
12276 #ifdef FEAT_CLIENTSERVER
12277 # ifdef WIN32
12278     /* On Win32 it's done in this application. */
12279     {
12280 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12281 
12282 	if (server_name != NULL)
12283 	    serverForeground(server_name);
12284     }
12285 # else
12286     /* Send a foreground() expression to the server. */
12287     argvars[1].v_type = VAR_STRING;
12288     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12289     argvars[2].v_type = VAR_UNKNOWN;
12290     remote_common(argvars, rettv, TRUE);
12291     vim_free(argvars[1].vval.v_string);
12292 # endif
12293 #endif
12294 }
12295 
12296 /*ARGSUSED*/
12297     static void
12298 f_remote_peek(argvars, rettv)
12299     typval_T	*argvars;
12300     typval_T	*rettv;
12301 {
12302 #ifdef FEAT_CLIENTSERVER
12303     dictitem_T	v;
12304     char_u	*s = NULL;
12305 # ifdef WIN32
12306     int		n = 0;
12307 # endif
12308     char_u	*serverid;
12309 
12310     if (check_restricted() || check_secure())
12311     {
12312 	rettv->vval.v_number = -1;
12313 	return;
12314     }
12315     serverid = get_tv_string_chk(&argvars[0]);
12316     if (serverid == NULL)
12317     {
12318 	rettv->vval.v_number = -1;
12319 	return;		/* type error; errmsg already given */
12320     }
12321 # ifdef WIN32
12322     sscanf(serverid, "%x", &n);
12323     if (n == 0)
12324 	rettv->vval.v_number = -1;
12325     else
12326     {
12327 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12328 	rettv->vval.v_number = (s != NULL);
12329     }
12330 # else
12331     rettv->vval.v_number = 0;
12332     if (check_connection() == FAIL)
12333 	return;
12334 
12335     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12336 						serverStrToWin(serverid), &s);
12337 # endif
12338 
12339     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12340     {
12341 	char_u		*retvar;
12342 
12343 	v.di_tv.v_type = VAR_STRING;
12344 	v.di_tv.vval.v_string = vim_strsave(s);
12345 	retvar = get_tv_string_chk(&argvars[1]);
12346 	if (retvar != NULL)
12347 	    set_var(retvar, &v.di_tv, FALSE);
12348 	vim_free(v.di_tv.vval.v_string);
12349     }
12350 #else
12351     rettv->vval.v_number = -1;
12352 #endif
12353 }
12354 
12355 /*ARGSUSED*/
12356     static void
12357 f_remote_read(argvars, rettv)
12358     typval_T	*argvars;
12359     typval_T	*rettv;
12360 {
12361     char_u	*r = NULL;
12362 
12363 #ifdef FEAT_CLIENTSERVER
12364     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12365 
12366     if (serverid != NULL && !check_restricted() && !check_secure())
12367     {
12368 # ifdef WIN32
12369 	/* The server's HWND is encoded in the 'id' parameter */
12370 	int		n = 0;
12371 
12372 	sscanf(serverid, "%x", &n);
12373 	if (n != 0)
12374 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12375 	if (r == NULL)
12376 # else
12377 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12378 		serverStrToWin(serverid), &r, FALSE) < 0)
12379 # endif
12380 	    EMSG(_("E277: Unable to read a server reply"));
12381     }
12382 #endif
12383     rettv->v_type = VAR_STRING;
12384     rettv->vval.v_string = r;
12385 }
12386 
12387 /*
12388  * "remote_send()" function
12389  */
12390 /*ARGSUSED*/
12391     static void
12392 f_remote_send(argvars, rettv)
12393     typval_T	*argvars;
12394     typval_T	*rettv;
12395 {
12396     rettv->v_type = VAR_STRING;
12397     rettv->vval.v_string = NULL;
12398 #ifdef FEAT_CLIENTSERVER
12399     remote_common(argvars, rettv, FALSE);
12400 #endif
12401 }
12402 
12403 /*
12404  * "remove()" function
12405  */
12406     static void
12407 f_remove(argvars, rettv)
12408     typval_T	*argvars;
12409     typval_T	*rettv;
12410 {
12411     list_T	*l;
12412     listitem_T	*item, *item2;
12413     listitem_T	*li;
12414     long	idx;
12415     long	end;
12416     char_u	*key;
12417     dict_T	*d;
12418     dictitem_T	*di;
12419 
12420     rettv->vval.v_number = 0;
12421     if (argvars[0].v_type == VAR_DICT)
12422     {
12423 	if (argvars[2].v_type != VAR_UNKNOWN)
12424 	    EMSG2(_(e_toomanyarg), "remove()");
12425 	else if ((d = argvars[0].vval.v_dict) != NULL
12426 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12427 	{
12428 	    key = get_tv_string_chk(&argvars[1]);
12429 	    if (key != NULL)
12430 	    {
12431 		di = dict_find(d, key, -1);
12432 		if (di == NULL)
12433 		    EMSG2(_(e_dictkey), key);
12434 		else
12435 		{
12436 		    *rettv = di->di_tv;
12437 		    init_tv(&di->di_tv);
12438 		    dictitem_remove(d, di);
12439 		}
12440 	    }
12441 	}
12442     }
12443     else if (argvars[0].v_type != VAR_LIST)
12444 	EMSG2(_(e_listdictarg), "remove()");
12445     else if ((l = argvars[0].vval.v_list) != NULL
12446 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12447     {
12448 	int	    error = FALSE;
12449 
12450 	idx = get_tv_number_chk(&argvars[1], &error);
12451 	if (error)
12452 	    ;		/* type error: do nothing, errmsg already given */
12453 	else if ((item = list_find(l, idx)) == NULL)
12454 	    EMSGN(_(e_listidx), idx);
12455 	else
12456 	{
12457 	    if (argvars[2].v_type == VAR_UNKNOWN)
12458 	    {
12459 		/* Remove one item, return its value. */
12460 		list_remove(l, item, item);
12461 		*rettv = item->li_tv;
12462 		vim_free(item);
12463 	    }
12464 	    else
12465 	    {
12466 		/* Remove range of items, return list with values. */
12467 		end = get_tv_number_chk(&argvars[2], &error);
12468 		if (error)
12469 		    ;		/* type error: do nothing */
12470 		else if ((item2 = list_find(l, end)) == NULL)
12471 		    EMSGN(_(e_listidx), end);
12472 		else
12473 		{
12474 		    int	    cnt = 0;
12475 
12476 		    for (li = item; li != NULL; li = li->li_next)
12477 		    {
12478 			++cnt;
12479 			if (li == item2)
12480 			    break;
12481 		    }
12482 		    if (li == NULL)  /* didn't find "item2" after "item" */
12483 			EMSG(_(e_invrange));
12484 		    else
12485 		    {
12486 			list_remove(l, item, item2);
12487 			l = list_alloc();
12488 			if (l != NULL)
12489 			{
12490 			    rettv->v_type = VAR_LIST;
12491 			    rettv->vval.v_list = l;
12492 			    l->lv_first = item;
12493 			    l->lv_last = item2;
12494 			    l->lv_refcount = 1;
12495 			    item->li_prev = NULL;
12496 			    item2->li_next = NULL;
12497 			    l->lv_len = cnt;
12498 			}
12499 		    }
12500 		}
12501 	    }
12502 	}
12503     }
12504 }
12505 
12506 /*
12507  * "rename({from}, {to})" function
12508  */
12509     static void
12510 f_rename(argvars, rettv)
12511     typval_T	*argvars;
12512     typval_T	*rettv;
12513 {
12514     char_u	buf[NUMBUFLEN];
12515 
12516     if (check_restricted() || check_secure())
12517 	rettv->vval.v_number = -1;
12518     else
12519 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12520 				      get_tv_string_buf(&argvars[1], buf));
12521 }
12522 
12523 /*
12524  * "repeat()" function
12525  */
12526 /*ARGSUSED*/
12527     static void
12528 f_repeat(argvars, rettv)
12529     typval_T	*argvars;
12530     typval_T	*rettv;
12531 {
12532     char_u	*p;
12533     int		n;
12534     int		slen;
12535     int		len;
12536     char_u	*r;
12537     int		i;
12538     list_T	*l;
12539 
12540     n = get_tv_number(&argvars[1]);
12541     if (argvars[0].v_type == VAR_LIST)
12542     {
12543 	l = list_alloc();
12544 	if (l != NULL && argvars[0].vval.v_list != NULL)
12545 	{
12546 	    l->lv_refcount = 1;
12547 	    while (n-- > 0)
12548 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12549 		    break;
12550 	}
12551 	rettv->v_type = VAR_LIST;
12552 	rettv->vval.v_list = l;
12553     }
12554     else
12555     {
12556 	p = get_tv_string(&argvars[0]);
12557 	rettv->v_type = VAR_STRING;
12558 	rettv->vval.v_string = NULL;
12559 
12560 	slen = (int)STRLEN(p);
12561 	len = slen * n;
12562 	if (len <= 0)
12563 	    return;
12564 
12565 	r = alloc(len + 1);
12566 	if (r != NULL)
12567 	{
12568 	    for (i = 0; i < n; i++)
12569 		mch_memmove(r + i * slen, p, (size_t)slen);
12570 	    r[len] = NUL;
12571 	}
12572 
12573 	rettv->vval.v_string = r;
12574     }
12575 }
12576 
12577 /*
12578  * "resolve()" function
12579  */
12580     static void
12581 f_resolve(argvars, rettv)
12582     typval_T	*argvars;
12583     typval_T	*rettv;
12584 {
12585     char_u	*p;
12586 
12587     p = get_tv_string(&argvars[0]);
12588 #ifdef FEAT_SHORTCUT
12589     {
12590 	char_u	*v = NULL;
12591 
12592 	v = mch_resolve_shortcut(p);
12593 	if (v != NULL)
12594 	    rettv->vval.v_string = v;
12595 	else
12596 	    rettv->vval.v_string = vim_strsave(p);
12597     }
12598 #else
12599 # ifdef HAVE_READLINK
12600     {
12601 	char_u	buf[MAXPATHL + 1];
12602 	char_u	*cpy;
12603 	int	len;
12604 	char_u	*remain = NULL;
12605 	char_u	*q;
12606 	int	is_relative_to_current = FALSE;
12607 	int	has_trailing_pathsep = FALSE;
12608 	int	limit = 100;
12609 
12610 	p = vim_strsave(p);
12611 
12612 	if (p[0] == '.' && (vim_ispathsep(p[1])
12613 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12614 	    is_relative_to_current = TRUE;
12615 
12616 	len = STRLEN(p);
12617 	if (len > 0 && after_pathsep(p, p + len))
12618 	    has_trailing_pathsep = TRUE;
12619 
12620 	q = getnextcomp(p);
12621 	if (*q != NUL)
12622 	{
12623 	    /* Separate the first path component in "p", and keep the
12624 	     * remainder (beginning with the path separator). */
12625 	    remain = vim_strsave(q - 1);
12626 	    q[-1] = NUL;
12627 	}
12628 
12629 	for (;;)
12630 	{
12631 	    for (;;)
12632 	    {
12633 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12634 		if (len <= 0)
12635 		    break;
12636 		buf[len] = NUL;
12637 
12638 		if (limit-- == 0)
12639 		{
12640 		    vim_free(p);
12641 		    vim_free(remain);
12642 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12643 		    rettv->vval.v_string = NULL;
12644 		    goto fail;
12645 		}
12646 
12647 		/* Ensure that the result will have a trailing path separator
12648 		 * if the argument has one. */
12649 		if (remain == NULL && has_trailing_pathsep)
12650 		    add_pathsep(buf);
12651 
12652 		/* Separate the first path component in the link value and
12653 		 * concatenate the remainders. */
12654 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12655 		if (*q != NUL)
12656 		{
12657 		    if (remain == NULL)
12658 			remain = vim_strsave(q - 1);
12659 		    else
12660 		    {
12661 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12662 			if (cpy != NULL)
12663 			{
12664 			    STRCAT(cpy, remain);
12665 			    vim_free(remain);
12666 			    remain = cpy;
12667 			}
12668 		    }
12669 		    q[-1] = NUL;
12670 		}
12671 
12672 		q = gettail(p);
12673 		if (q > p && *q == NUL)
12674 		{
12675 		    /* Ignore trailing path separator. */
12676 		    q[-1] = NUL;
12677 		    q = gettail(p);
12678 		}
12679 		if (q > p && !mch_isFullName(buf))
12680 		{
12681 		    /* symlink is relative to directory of argument */
12682 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12683 		    if (cpy != NULL)
12684 		    {
12685 			STRCPY(cpy, p);
12686 			STRCPY(gettail(cpy), buf);
12687 			vim_free(p);
12688 			p = cpy;
12689 		    }
12690 		}
12691 		else
12692 		{
12693 		    vim_free(p);
12694 		    p = vim_strsave(buf);
12695 		}
12696 	    }
12697 
12698 	    if (remain == NULL)
12699 		break;
12700 
12701 	    /* Append the first path component of "remain" to "p". */
12702 	    q = getnextcomp(remain + 1);
12703 	    len = q - remain - (*q != NUL);
12704 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12705 	    if (cpy != NULL)
12706 	    {
12707 		STRNCAT(cpy, remain, len);
12708 		vim_free(p);
12709 		p = cpy;
12710 	    }
12711 	    /* Shorten "remain". */
12712 	    if (*q != NUL)
12713 		STRCPY(remain, q - 1);
12714 	    else
12715 	    {
12716 		vim_free(remain);
12717 		remain = NULL;
12718 	    }
12719 	}
12720 
12721 	/* If the result is a relative path name, make it explicitly relative to
12722 	 * the current directory if and only if the argument had this form. */
12723 	if (!vim_ispathsep(*p))
12724 	{
12725 	    if (is_relative_to_current
12726 		    && *p != NUL
12727 		    && !(p[0] == '.'
12728 			&& (p[1] == NUL
12729 			    || vim_ispathsep(p[1])
12730 			    || (p[1] == '.'
12731 				&& (p[2] == NUL
12732 				    || vim_ispathsep(p[2]))))))
12733 	    {
12734 		/* Prepend "./". */
12735 		cpy = concat_str((char_u *)"./", p);
12736 		if (cpy != NULL)
12737 		{
12738 		    vim_free(p);
12739 		    p = cpy;
12740 		}
12741 	    }
12742 	    else if (!is_relative_to_current)
12743 	    {
12744 		/* Strip leading "./". */
12745 		q = p;
12746 		while (q[0] == '.' && vim_ispathsep(q[1]))
12747 		    q += 2;
12748 		if (q > p)
12749 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12750 	    }
12751 	}
12752 
12753 	/* Ensure that the result will have no trailing path separator
12754 	 * if the argument had none.  But keep "/" or "//". */
12755 	if (!has_trailing_pathsep)
12756 	{
12757 	    q = p + STRLEN(p);
12758 	    if (after_pathsep(p, q))
12759 		*gettail_sep(p) = NUL;
12760 	}
12761 
12762 	rettv->vval.v_string = p;
12763     }
12764 # else
12765     rettv->vval.v_string = vim_strsave(p);
12766 # endif
12767 #endif
12768 
12769     simplify_filename(rettv->vval.v_string);
12770 
12771 #ifdef HAVE_READLINK
12772 fail:
12773 #endif
12774     rettv->v_type = VAR_STRING;
12775 }
12776 
12777 /*
12778  * "reverse({list})" function
12779  */
12780     static void
12781 f_reverse(argvars, rettv)
12782     typval_T	*argvars;
12783     typval_T	*rettv;
12784 {
12785     list_T	*l;
12786     listitem_T	*li, *ni;
12787 
12788     rettv->vval.v_number = 0;
12789     if (argvars[0].v_type != VAR_LIST)
12790 	EMSG2(_(e_listarg), "reverse()");
12791     else if ((l = argvars[0].vval.v_list) != NULL
12792 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12793     {
12794 	li = l->lv_last;
12795 	l->lv_first = l->lv_last = NULL;
12796 	l->lv_len = 0;
12797 	while (li != NULL)
12798 	{
12799 	    ni = li->li_prev;
12800 	    list_append(l, li);
12801 	    li = ni;
12802 	}
12803 	rettv->vval.v_list = l;
12804 	rettv->v_type = VAR_LIST;
12805 	++l->lv_refcount;
12806     }
12807 }
12808 
12809 #define SP_NOMOVE	1	/* don't move cursor */
12810 #define SP_REPEAT	2	/* repeat to find outer pair */
12811 #define SP_RETCOUNT	4	/* return matchcount */
12812 #define SP_SETPCMARK	8       /* set previous context mark */
12813 
12814 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12815 
12816 /*
12817  * Get flags for a search function.
12818  * Possibly sets "p_ws".
12819  * Returns BACKWARD, FORWARD or zero (for an error).
12820  */
12821     static int
12822 get_search_arg(varp, flagsp)
12823     typval_T	*varp;
12824     int		*flagsp;
12825 {
12826     int		dir = FORWARD;
12827     char_u	*flags;
12828     char_u	nbuf[NUMBUFLEN];
12829     int		mask;
12830 
12831     if (varp->v_type != VAR_UNKNOWN)
12832     {
12833 	flags = get_tv_string_buf_chk(varp, nbuf);
12834 	if (flags == NULL)
12835 	    return 0;		/* type error; errmsg already given */
12836 	while (*flags != NUL)
12837 	{
12838 	    switch (*flags)
12839 	    {
12840 		case 'b': dir = BACKWARD; break;
12841 		case 'w': p_ws = TRUE; break;
12842 		case 'W': p_ws = FALSE; break;
12843 		default:  mask = 0;
12844 			  if (flagsp != NULL)
12845 			     switch (*flags)
12846 			     {
12847 				 case 'n': mask = SP_NOMOVE; break;
12848 				 case 'r': mask = SP_REPEAT; break;
12849 				 case 'm': mask = SP_RETCOUNT; break;
12850 				 case 's': mask = SP_SETPCMARK; break;
12851 			     }
12852 			  if (mask == 0)
12853 			  {
12854 			      EMSG2(_(e_invarg2), flags);
12855 			      dir = 0;
12856 			  }
12857 			  else
12858 			      *flagsp |= mask;
12859 	    }
12860 	    if (dir == 0)
12861 		break;
12862 	    ++flags;
12863 	}
12864     }
12865     return dir;
12866 }
12867 
12868 /*
12869  * "search()" function
12870  */
12871     static void
12872 f_search(argvars, rettv)
12873     typval_T	*argvars;
12874     typval_T	*rettv;
12875 {
12876     char_u	*pat;
12877     pos_T	pos;
12878     pos_T	save_cursor;
12879     int		save_p_ws = p_ws;
12880     int		dir;
12881     int		flags = 0;
12882 
12883     rettv->vval.v_number = 0;	/* default: FAIL */
12884 
12885     pat = get_tv_string(&argvars[0]);
12886     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
12887     if (dir == 0)
12888 	goto theend;
12889     /*
12890      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
12891      * Check to make sure only those flags are set.
12892      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
12893      * flags cannot be set. Check for that condition also.
12894      */
12895     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
12896 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
12897     {
12898 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12899 	goto theend;
12900     }
12901 
12902     pos = save_cursor = curwin->w_cursor;
12903     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
12904 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
12905     {
12906 	rettv->vval.v_number = pos.lnum;
12907 	if (flags & SP_SETPCMARK)
12908 	    setpcmark();
12909 	curwin->w_cursor = pos;
12910 	/* "/$" will put the cursor after the end of the line, may need to
12911 	 * correct that here */
12912 	check_cursor();
12913     }
12914 
12915     /* If 'n' flag is used: restore cursor position. */
12916     if (flags & SP_NOMOVE)
12917 	curwin->w_cursor = save_cursor;
12918 theend:
12919     p_ws = save_p_ws;
12920 }
12921 
12922 /*
12923  * "searchpair()" function
12924  */
12925     static void
12926 f_searchpair(argvars, rettv)
12927     typval_T	*argvars;
12928     typval_T	*rettv;
12929 {
12930     char_u	*spat, *mpat, *epat;
12931     char_u	*skip;
12932     int		save_p_ws = p_ws;
12933     int		dir;
12934     int		flags = 0;
12935     char_u	nbuf1[NUMBUFLEN];
12936     char_u	nbuf2[NUMBUFLEN];
12937     char_u	nbuf3[NUMBUFLEN];
12938 
12939     rettv->vval.v_number = 0;	/* default: FAIL */
12940 
12941     /* Get the three pattern arguments: start, middle, end. */
12942     spat = get_tv_string_chk(&argvars[0]);
12943     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
12944     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
12945     if (spat == NULL || mpat == NULL || epat == NULL)
12946 	goto theend;	    /* type error */
12947 
12948     /* Handle the optional fourth argument: flags */
12949     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
12950     if (dir == 0)
12951 	goto theend;
12952     /*
12953      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
12954      */
12955     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
12956     {
12957 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12958 	goto theend;
12959     }
12960 
12961     /* Optional fifth argument: skip expresion */
12962     if (argvars[3].v_type == VAR_UNKNOWN
12963 	    || argvars[4].v_type == VAR_UNKNOWN)
12964 	skip = (char_u *)"";
12965     else
12966 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
12967     if (skip == NULL)
12968 	goto theend;	    /* type error */
12969 
12970     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
12971 
12972 theend:
12973     p_ws = save_p_ws;
12974 }
12975 
12976 /*
12977  * Search for a start/middle/end thing.
12978  * Used by searchpair(), see its documentation for the details.
12979  * Returns 0 or -1 for no match,
12980  */
12981     long
12982 do_searchpair(spat, mpat, epat, dir, skip, flags)
12983     char_u	*spat;	    /* start pattern */
12984     char_u	*mpat;	    /* middle pattern */
12985     char_u	*epat;	    /* end pattern */
12986     int		dir;	    /* BACKWARD or FORWARD */
12987     char_u	*skip;	    /* skip expression */
12988     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
12989 {
12990     char_u	*save_cpo;
12991     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
12992     long	retval = 0;
12993     pos_T	pos;
12994     pos_T	firstpos;
12995     pos_T	foundpos;
12996     pos_T	save_cursor;
12997     pos_T	save_pos;
12998     int		n;
12999     int		r;
13000     int		nest = 1;
13001     int		err;
13002 
13003     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13004     save_cpo = p_cpo;
13005     p_cpo = (char_u *)"";
13006 
13007     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13008      * start/middle/end (pat3, for the top pair). */
13009     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13010     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13011     if (pat2 == NULL || pat3 == NULL)
13012 	goto theend;
13013     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13014     if (*mpat == NUL)
13015 	STRCPY(pat3, pat2);
13016     else
13017 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13018 							    spat, epat, mpat);
13019 
13020     save_cursor = curwin->w_cursor;
13021     pos = curwin->w_cursor;
13022     firstpos.lnum = 0;
13023     foundpos.lnum = 0;
13024     pat = pat3;
13025     for (;;)
13026     {
13027 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13028 						      SEARCH_KEEP, RE_SEARCH);
13029 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13030 	    /* didn't find it or found the first match again: FAIL */
13031 	    break;
13032 
13033 	if (firstpos.lnum == 0)
13034 	    firstpos = pos;
13035 	if (equalpos(pos, foundpos))
13036 	{
13037 	    /* Found the same position again.  Can happen with a pattern that
13038 	     * has "\zs" at the end and searching backwards.  Advance one
13039 	     * character and try again. */
13040 	    if (dir == BACKWARD)
13041 		decl(&pos);
13042 	    else
13043 		incl(&pos);
13044 	}
13045 	foundpos = pos;
13046 
13047 	/* If the skip pattern matches, ignore this match. */
13048 	if (*skip != NUL)
13049 	{
13050 	    save_pos = curwin->w_cursor;
13051 	    curwin->w_cursor = pos;
13052 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13053 	    curwin->w_cursor = save_pos;
13054 	    if (err)
13055 	    {
13056 		/* Evaluating {skip} caused an error, break here. */
13057 		curwin->w_cursor = save_cursor;
13058 		retval = -1;
13059 		break;
13060 	    }
13061 	    if (r)
13062 		continue;
13063 	}
13064 
13065 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13066 	{
13067 	    /* Found end when searching backwards or start when searching
13068 	     * forward: nested pair. */
13069 	    ++nest;
13070 	    pat = pat2;		/* nested, don't search for middle */
13071 	}
13072 	else
13073 	{
13074 	    /* Found end when searching forward or start when searching
13075 	     * backward: end of (nested) pair; or found middle in outer pair. */
13076 	    if (--nest == 1)
13077 		pat = pat3;	/* outer level, search for middle */
13078 	}
13079 
13080 	if (nest == 0)
13081 	{
13082 	    /* Found the match: return matchcount or line number. */
13083 	    if (flags & SP_RETCOUNT)
13084 		++retval;
13085 	    else
13086 		retval = pos.lnum;
13087 	    if (flags & SP_SETPCMARK)
13088 		setpcmark();
13089 	    curwin->w_cursor = pos;
13090 	    if (!(flags & SP_REPEAT))
13091 		break;
13092 	    nest = 1;	    /* search for next unmatched */
13093 	}
13094     }
13095 
13096     /* If 'n' flag is used or search failed: restore cursor position. */
13097     if ((flags & SP_NOMOVE) || retval == 0)
13098 	curwin->w_cursor = save_cursor;
13099 
13100 theend:
13101     vim_free(pat2);
13102     vim_free(pat3);
13103     p_cpo = save_cpo;
13104 
13105     return retval;
13106 }
13107 
13108 /*ARGSUSED*/
13109     static void
13110 f_server2client(argvars, rettv)
13111     typval_T	*argvars;
13112     typval_T	*rettv;
13113 {
13114 #ifdef FEAT_CLIENTSERVER
13115     char_u	buf[NUMBUFLEN];
13116     char_u	*server = get_tv_string_chk(&argvars[0]);
13117     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13118 
13119     rettv->vval.v_number = -1;
13120     if (server == NULL || reply == NULL)
13121 	return;
13122     if (check_restricted() || check_secure())
13123 	return;
13124 # ifdef FEAT_X11
13125     if (check_connection() == FAIL)
13126 	return;
13127 # endif
13128 
13129     if (serverSendReply(server, reply) < 0)
13130     {
13131 	EMSG(_("E258: Unable to send to client"));
13132 	return;
13133     }
13134     rettv->vval.v_number = 0;
13135 #else
13136     rettv->vval.v_number = -1;
13137 #endif
13138 }
13139 
13140 /*ARGSUSED*/
13141     static void
13142 f_serverlist(argvars, rettv)
13143     typval_T	*argvars;
13144     typval_T	*rettv;
13145 {
13146     char_u	*r = NULL;
13147 
13148 #ifdef FEAT_CLIENTSERVER
13149 # ifdef WIN32
13150     r = serverGetVimNames();
13151 # else
13152     make_connection();
13153     if (X_DISPLAY != NULL)
13154 	r = serverGetVimNames(X_DISPLAY);
13155 # endif
13156 #endif
13157     rettv->v_type = VAR_STRING;
13158     rettv->vval.v_string = r;
13159 }
13160 
13161 /*
13162  * "setbufvar()" function
13163  */
13164 /*ARGSUSED*/
13165     static void
13166 f_setbufvar(argvars, rettv)
13167     typval_T	*argvars;
13168     typval_T	*rettv;
13169 {
13170     buf_T	*buf;
13171 #ifdef FEAT_AUTOCMD
13172     aco_save_T	aco;
13173 #else
13174     buf_T	*save_curbuf;
13175 #endif
13176     char_u	*varname, *bufvarname;
13177     typval_T	*varp;
13178     char_u	nbuf[NUMBUFLEN];
13179 
13180     rettv->vval.v_number = 0;
13181 
13182     if (check_restricted() || check_secure())
13183 	return;
13184     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13185     varname = get_tv_string_chk(&argvars[1]);
13186     buf = get_buf_tv(&argvars[0]);
13187     varp = &argvars[2];
13188 
13189     if (buf != NULL && varname != NULL && varp != NULL)
13190     {
13191 	/* set curbuf to be our buf, temporarily */
13192 #ifdef FEAT_AUTOCMD
13193 	aucmd_prepbuf(&aco, buf);
13194 #else
13195 	save_curbuf = curbuf;
13196 	curbuf = buf;
13197 #endif
13198 
13199 	if (*varname == '&')
13200 	{
13201 	    long	numval;
13202 	    char_u	*strval;
13203 	    int		error = FALSE;
13204 
13205 	    ++varname;
13206 	    numval = get_tv_number_chk(varp, &error);
13207 	    strval = get_tv_string_buf_chk(varp, nbuf);
13208 	    if (!error && strval != NULL)
13209 		set_option_value(varname, numval, strval, OPT_LOCAL);
13210 	}
13211 	else
13212 	{
13213 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13214 	    if (bufvarname != NULL)
13215 	    {
13216 		STRCPY(bufvarname, "b:");
13217 		STRCPY(bufvarname + 2, varname);
13218 		set_var(bufvarname, varp, TRUE);
13219 		vim_free(bufvarname);
13220 	    }
13221 	}
13222 
13223 	/* reset notion of buffer */
13224 #ifdef FEAT_AUTOCMD
13225 	aucmd_restbuf(&aco);
13226 #else
13227 	curbuf = save_curbuf;
13228 #endif
13229     }
13230 }
13231 
13232 /*
13233  * "setcmdpos()" function
13234  */
13235     static void
13236 f_setcmdpos(argvars, rettv)
13237     typval_T	*argvars;
13238     typval_T	*rettv;
13239 {
13240     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13241 
13242     if (pos >= 0)
13243 	rettv->vval.v_number = set_cmdline_pos(pos);
13244 }
13245 
13246 /*
13247  * "setline()" function
13248  */
13249     static void
13250 f_setline(argvars, rettv)
13251     typval_T	*argvars;
13252     typval_T	*rettv;
13253 {
13254     linenr_T	lnum;
13255     char_u	*line = NULL;
13256     list_T	*l = NULL;
13257     listitem_T	*li = NULL;
13258     long	added = 0;
13259     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13260 
13261     lnum = get_tv_lnum(&argvars[0]);
13262     if (argvars[1].v_type == VAR_LIST)
13263     {
13264 	l = argvars[1].vval.v_list;
13265 	li = l->lv_first;
13266     }
13267     else
13268 	line = get_tv_string_chk(&argvars[1]);
13269 
13270     rettv->vval.v_number = 0;		/* OK */
13271     for (;;)
13272     {
13273 	if (l != NULL)
13274 	{
13275 	    /* list argument, get next string */
13276 	    if (li == NULL)
13277 		break;
13278 	    line = get_tv_string_chk(&li->li_tv);
13279 	    li = li->li_next;
13280 	}
13281 
13282 	rettv->vval.v_number = 1;	/* FAIL */
13283 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13284 	    break;
13285 	if (lnum <= curbuf->b_ml.ml_line_count)
13286 	{
13287 	    /* existing line, replace it */
13288 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13289 	    {
13290 		changed_bytes(lnum, 0);
13291 		check_cursor_col();
13292 		rettv->vval.v_number = 0;	/* OK */
13293 	    }
13294 	}
13295 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13296 	{
13297 	    /* lnum is one past the last line, append the line */
13298 	    ++added;
13299 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13300 		rettv->vval.v_number = 0;	/* OK */
13301 	}
13302 
13303 	if (l == NULL)			/* only one string argument */
13304 	    break;
13305 	++lnum;
13306     }
13307 
13308     if (added > 0)
13309 	appended_lines_mark(lcount, added);
13310 }
13311 
13312 /*
13313  * "setqflist()" function
13314  */
13315 /*ARGSUSED*/
13316     static void
13317 f_setqflist(argvars, rettv)
13318     typval_T	*argvars;
13319     typval_T	*rettv;
13320 {
13321     char_u	*act;
13322     int		action = ' ';
13323 
13324     rettv->vval.v_number = -1;
13325 
13326 #ifdef FEAT_QUICKFIX
13327     if (argvars[0].v_type != VAR_LIST)
13328 	EMSG(_(e_listreq));
13329     else
13330     {
13331 	list_T  *l = argvars[0].vval.v_list;
13332 
13333 	if (argvars[1].v_type == VAR_STRING)
13334 	{
13335 	    act = get_tv_string_chk(&argvars[1]);
13336 	    if (act == NULL)
13337 		return;		/* type error; errmsg already given */
13338 	    if (*act == 'a' || *act == 'r')
13339 		action = *act;
13340 	}
13341 
13342 	if (l != NULL && set_errorlist(l, action) == OK)
13343 	    rettv->vval.v_number = 0;
13344     }
13345 #endif
13346 }
13347 
13348 /*
13349  * "setreg()" function
13350  */
13351     static void
13352 f_setreg(argvars, rettv)
13353     typval_T	*argvars;
13354     typval_T	*rettv;
13355 {
13356     int		regname;
13357     char_u	*strregname;
13358     char_u	*stropt;
13359     char_u	*strval;
13360     int		append;
13361     char_u	yank_type;
13362     long	block_len;
13363 
13364     block_len = -1;
13365     yank_type = MAUTO;
13366     append = FALSE;
13367 
13368     strregname = get_tv_string_chk(argvars);
13369     rettv->vval.v_number = 1;		/* FAIL is default */
13370 
13371     if (strregname == NULL)
13372 	return;		/* type error; errmsg already given */
13373     regname = *strregname;
13374     if (regname == 0 || regname == '@')
13375 	regname = '"';
13376     else if (regname == '=')
13377 	return;
13378 
13379     if (argvars[2].v_type != VAR_UNKNOWN)
13380     {
13381 	stropt = get_tv_string_chk(&argvars[2]);
13382 	if (stropt == NULL)
13383 	    return;		/* type error */
13384 	for (; *stropt != NUL; ++stropt)
13385 	    switch (*stropt)
13386 	    {
13387 		case 'a': case 'A':	/* append */
13388 		    append = TRUE;
13389 		    break;
13390 		case 'v': case 'c':	/* character-wise selection */
13391 		    yank_type = MCHAR;
13392 		    break;
13393 		case 'V': case 'l':	/* line-wise selection */
13394 		    yank_type = MLINE;
13395 		    break;
13396 #ifdef FEAT_VISUAL
13397 		case 'b': case Ctrl_V:	/* block-wise selection */
13398 		    yank_type = MBLOCK;
13399 		    if (VIM_ISDIGIT(stropt[1]))
13400 		    {
13401 			++stropt;
13402 			block_len = getdigits(&stropt) - 1;
13403 			--stropt;
13404 		    }
13405 		    break;
13406 #endif
13407 	    }
13408     }
13409 
13410     strval = get_tv_string_chk(&argvars[1]);
13411     if (strval != NULL)
13412 	write_reg_contents_ex(regname, strval, -1,
13413 						append, yank_type, block_len);
13414     rettv->vval.v_number = 0;
13415 }
13416 
13417 
13418 /*
13419  * "setwinvar(expr)" function
13420  */
13421 /*ARGSUSED*/
13422     static void
13423 f_setwinvar(argvars, rettv)
13424     typval_T	*argvars;
13425     typval_T	*rettv;
13426 {
13427     win_T	*win;
13428 #ifdef FEAT_WINDOWS
13429     win_T	*save_curwin;
13430 #endif
13431     char_u	*varname, *winvarname;
13432     typval_T	*varp;
13433     char_u	nbuf[NUMBUFLEN];
13434 
13435     rettv->vval.v_number = 0;
13436 
13437     if (check_restricted() || check_secure())
13438 	return;
13439     win = find_win_by_nr(&argvars[0]);
13440     varname = get_tv_string_chk(&argvars[1]);
13441     varp = &argvars[2];
13442 
13443     if (win != NULL && varname != NULL && varp != NULL)
13444     {
13445 #ifdef FEAT_WINDOWS
13446 	/* set curwin to be our win, temporarily */
13447 	save_curwin = curwin;
13448 	curwin = win;
13449 	curbuf = curwin->w_buffer;
13450 #endif
13451 
13452 	if (*varname == '&')
13453 	{
13454 	    long	numval;
13455 	    char_u	*strval;
13456 	    int		error = FALSE;
13457 
13458 	    ++varname;
13459 	    numval = get_tv_number_chk(varp, &error);
13460 	    strval = get_tv_string_buf_chk(varp, nbuf);
13461 	    if (!error && strval != NULL)
13462 		set_option_value(varname, numval, strval, OPT_LOCAL);
13463 	}
13464 	else
13465 	{
13466 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13467 	    if (winvarname != NULL)
13468 	    {
13469 		STRCPY(winvarname, "w:");
13470 		STRCPY(winvarname + 2, varname);
13471 		set_var(winvarname, varp, TRUE);
13472 		vim_free(winvarname);
13473 	    }
13474 	}
13475 
13476 #ifdef FEAT_WINDOWS
13477 	/* Restore current window, if it's still valid (autocomands can make
13478 	 * it invalid). */
13479 	if (win_valid(save_curwin))
13480 	{
13481 	    curwin = save_curwin;
13482 	    curbuf = curwin->w_buffer;
13483 	}
13484 #endif
13485     }
13486 }
13487 
13488 /*
13489  * "simplify()" function
13490  */
13491     static void
13492 f_simplify(argvars, rettv)
13493     typval_T	*argvars;
13494     typval_T	*rettv;
13495 {
13496     char_u	*p;
13497 
13498     p = get_tv_string(&argvars[0]);
13499     rettv->vval.v_string = vim_strsave(p);
13500     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13501     rettv->v_type = VAR_STRING;
13502 }
13503 
13504 static int
13505 #ifdef __BORLANDC__
13506     _RTLENTRYF
13507 #endif
13508 	item_compare __ARGS((const void *s1, const void *s2));
13509 static int
13510 #ifdef __BORLANDC__
13511     _RTLENTRYF
13512 #endif
13513 	item_compare2 __ARGS((const void *s1, const void *s2));
13514 
13515 static int	item_compare_ic;
13516 static char_u	*item_compare_func;
13517 static int	item_compare_func_err;
13518 #define ITEM_COMPARE_FAIL 999
13519 
13520 /*
13521  * Compare functions for f_sort() below.
13522  */
13523     static int
13524 #ifdef __BORLANDC__
13525 _RTLENTRYF
13526 #endif
13527 item_compare(s1, s2)
13528     const void	*s1;
13529     const void	*s2;
13530 {
13531     char_u	*p1, *p2;
13532     char_u	*tofree1, *tofree2;
13533     int		res;
13534     char_u	numbuf1[NUMBUFLEN];
13535     char_u	numbuf2[NUMBUFLEN];
13536 
13537     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13538     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13539     if (item_compare_ic)
13540 	res = STRICMP(p1, p2);
13541     else
13542 	res = STRCMP(p1, p2);
13543     vim_free(tofree1);
13544     vim_free(tofree2);
13545     return res;
13546 }
13547 
13548     static int
13549 #ifdef __BORLANDC__
13550 _RTLENTRYF
13551 #endif
13552 item_compare2(s1, s2)
13553     const void	*s1;
13554     const void	*s2;
13555 {
13556     int		res;
13557     typval_T	rettv;
13558     typval_T	argv[2];
13559     int		dummy;
13560 
13561     /* shortcut after failure in previous call; compare all items equal */
13562     if (item_compare_func_err)
13563 	return 0;
13564 
13565     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13566      * in the copy without changing the original list items. */
13567     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13568     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13569 
13570     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13571     res = call_func(item_compare_func, STRLEN(item_compare_func),
13572 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13573     clear_tv(&argv[0]);
13574     clear_tv(&argv[1]);
13575 
13576     if (res == FAIL)
13577 	res = ITEM_COMPARE_FAIL;
13578     else
13579 	/* return value has wrong type */
13580 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13581     if (item_compare_func_err)
13582 	res = ITEM_COMPARE_FAIL;
13583     clear_tv(&rettv);
13584     return res;
13585 }
13586 
13587 /*
13588  * "sort({list})" function
13589  */
13590     static void
13591 f_sort(argvars, rettv)
13592     typval_T	*argvars;
13593     typval_T	*rettv;
13594 {
13595     list_T	*l;
13596     listitem_T	*li;
13597     listitem_T	**ptrs;
13598     long	len;
13599     long	i;
13600 
13601     rettv->vval.v_number = 0;
13602     if (argvars[0].v_type != VAR_LIST)
13603 	EMSG2(_(e_listarg), "sort()");
13604     else
13605     {
13606 	l = argvars[0].vval.v_list;
13607 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13608 	    return;
13609 	rettv->vval.v_list = l;
13610 	rettv->v_type = VAR_LIST;
13611 	++l->lv_refcount;
13612 
13613 	len = list_len(l);
13614 	if (len <= 1)
13615 	    return;	/* short list sorts pretty quickly */
13616 
13617 	item_compare_ic = FALSE;
13618 	item_compare_func = NULL;
13619 	if (argvars[1].v_type != VAR_UNKNOWN)
13620 	{
13621 	    if (argvars[1].v_type == VAR_FUNC)
13622 		item_compare_func = argvars[1].vval.v_string;
13623 	    else
13624 	    {
13625 		int	    error = FALSE;
13626 
13627 		i = get_tv_number_chk(&argvars[1], &error);
13628 		if (error)
13629 		    return;		/* type error; errmsg already given */
13630 		if (i == 1)
13631 		    item_compare_ic = TRUE;
13632 		else
13633 		    item_compare_func = get_tv_string(&argvars[1]);
13634 	    }
13635 	}
13636 
13637 	/* Make an array with each entry pointing to an item in the List. */
13638 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13639 	if (ptrs == NULL)
13640 	    return;
13641 	i = 0;
13642 	for (li = l->lv_first; li != NULL; li = li->li_next)
13643 	    ptrs[i++] = li;
13644 
13645 	item_compare_func_err = FALSE;
13646 	/* test the compare function */
13647 	if (item_compare_func != NULL
13648 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13649 							 == ITEM_COMPARE_FAIL)
13650 	    EMSG(_("E702: Sort compare function failed"));
13651 	else
13652 	{
13653 	    /* Sort the array with item pointers. */
13654 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13655 		    item_compare_func == NULL ? item_compare : item_compare2);
13656 
13657 	    if (!item_compare_func_err)
13658 	    {
13659 		/* Clear the List and append the items in the sorted order. */
13660 		l->lv_first = l->lv_last = NULL;
13661 		l->lv_len = 0;
13662 		for (i = 0; i < len; ++i)
13663 		    list_append(l, ptrs[i]);
13664 	    }
13665 	}
13666 
13667 	vim_free(ptrs);
13668     }
13669 }
13670 
13671 /*
13672  * "soundfold({word})" function
13673  */
13674     static void
13675 f_soundfold(argvars, rettv)
13676     typval_T	*argvars;
13677     typval_T	*rettv;
13678 {
13679     char_u	*s;
13680 
13681     rettv->v_type = VAR_STRING;
13682     s = get_tv_string(&argvars[0]);
13683 #ifdef FEAT_SYN_HL
13684     rettv->vval.v_string = eval_soundfold(s);
13685 #else
13686     rettv->vval.v_string = vim_strsave(s);
13687 #endif
13688 }
13689 
13690 /*
13691  * "spellbadword()" function
13692  */
13693 /* ARGSUSED */
13694     static void
13695 f_spellbadword(argvars, rettv)
13696     typval_T	*argvars;
13697     typval_T	*rettv;
13698 {
13699     int		attr;
13700     char_u	*ptr;
13701     int		len;
13702 
13703     rettv->vval.v_string = NULL;
13704     rettv->v_type = VAR_STRING;
13705 
13706 #ifdef FEAT_SYN_HL
13707     /* Find the start of the badly spelled word. */
13708     if (spell_move_to(FORWARD, TRUE, TRUE) == FAIL)
13709 	return;
13710 
13711     /* Get the length of the word and copy it. */
13712     ptr = ml_get_cursor();
13713     len = spell_check(curwin, ptr, &attr, NULL);
13714     rettv->vval.v_string = vim_strnsave(ptr, len);
13715 #endif
13716 }
13717 
13718 /*
13719  * "spellsuggest()" function
13720  */
13721     static void
13722 f_spellsuggest(argvars, rettv)
13723     typval_T	*argvars;
13724     typval_T	*rettv;
13725 {
13726     char_u	*str;
13727     int		maxcount;
13728     garray_T	ga;
13729     list_T	*l;
13730     listitem_T	*li;
13731     int		i;
13732 
13733     l = list_alloc();
13734     if (l == NULL)
13735 	return;
13736     rettv->v_type = VAR_LIST;
13737     rettv->vval.v_list = l;
13738     ++l->lv_refcount;
13739 
13740 #ifdef FEAT_SYN_HL
13741     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13742     {
13743 	str = get_tv_string(&argvars[0]);
13744 	if (argvars[1].v_type != VAR_UNKNOWN)
13745 	{
13746 	    maxcount = get_tv_number(&argvars[1]);
13747 	    if (maxcount <= 0)
13748 		return;
13749 	}
13750 	else
13751 	    maxcount = 25;
13752 
13753 	spell_suggest_list(&ga, str, maxcount);
13754 
13755 	for (i = 0; i < ga.ga_len; ++i)
13756 	{
13757 	    str = ((char_u **)ga.ga_data)[i];
13758 
13759 	    li = listitem_alloc();
13760 	    if (li == NULL)
13761 		vim_free(str);
13762 	    else
13763 	    {
13764 		li->li_tv.v_type = VAR_STRING;
13765 		li->li_tv.v_lock = 0;
13766 		li->li_tv.vval.v_string = str;
13767 		list_append(l, li);
13768 	    }
13769 	}
13770 	ga_clear(&ga);
13771     }
13772 #endif
13773 }
13774 
13775     static void
13776 f_split(argvars, rettv)
13777     typval_T	*argvars;
13778     typval_T	*rettv;
13779 {
13780     char_u	*str;
13781     char_u	*end;
13782     char_u	*pat = NULL;
13783     regmatch_T	regmatch;
13784     char_u	patbuf[NUMBUFLEN];
13785     char_u	*save_cpo;
13786     int		match;
13787     listitem_T	*ni;
13788     list_T	*l;
13789     colnr_T	col = 0;
13790     int		keepempty = FALSE;
13791     int		typeerr = FALSE;
13792 
13793     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13794     save_cpo = p_cpo;
13795     p_cpo = (char_u *)"";
13796 
13797     str = get_tv_string(&argvars[0]);
13798     if (argvars[1].v_type != VAR_UNKNOWN)
13799     {
13800 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13801 	if (pat == NULL)
13802 	    typeerr = TRUE;
13803 	if (argvars[2].v_type != VAR_UNKNOWN)
13804 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13805     }
13806     if (pat == NULL || *pat == NUL)
13807 	pat = (char_u *)"[\\x01- ]\\+";
13808 
13809     l = list_alloc();
13810     if (l == NULL)
13811 	return;
13812     rettv->v_type = VAR_LIST;
13813     rettv->vval.v_list = l;
13814     ++l->lv_refcount;
13815     if (typeerr)
13816 	return;
13817 
13818     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
13819     if (regmatch.regprog != NULL)
13820     {
13821 	regmatch.rm_ic = FALSE;
13822 	while (*str != NUL || keepempty)
13823 	{
13824 	    if (*str == NUL)
13825 		match = FALSE;	/* empty item at the end */
13826 	    else
13827 		match = vim_regexec_nl(&regmatch, str, col);
13828 	    if (match)
13829 		end = regmatch.startp[0];
13830 	    else
13831 		end = str + STRLEN(str);
13832 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
13833 					  && match && end < regmatch.endp[0]))
13834 	    {
13835 		ni = listitem_alloc();
13836 		if (ni == NULL)
13837 		    break;
13838 		ni->li_tv.v_type = VAR_STRING;
13839 		ni->li_tv.v_lock = 0;
13840 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
13841 		list_append(l, ni);
13842 	    }
13843 	    if (!match)
13844 		break;
13845 	    /* Advance to just after the match. */
13846 	    if (regmatch.endp[0] > str)
13847 		col = 0;
13848 	    else
13849 	    {
13850 		/* Don't get stuck at the same match. */
13851 #ifdef FEAT_MBYTE
13852 		col = mb_ptr2len_check(regmatch.endp[0]);
13853 #else
13854 		col = 1;
13855 #endif
13856 	    }
13857 	    str = regmatch.endp[0];
13858 	}
13859 
13860 	vim_free(regmatch.regprog);
13861     }
13862 
13863     p_cpo = save_cpo;
13864 }
13865 
13866 #ifdef HAVE_STRFTIME
13867 /*
13868  * "strftime({format}[, {time}])" function
13869  */
13870     static void
13871 f_strftime(argvars, rettv)
13872     typval_T	*argvars;
13873     typval_T	*rettv;
13874 {
13875     char_u	result_buf[256];
13876     struct tm	*curtime;
13877     time_t	seconds;
13878     char_u	*p;
13879 
13880     rettv->v_type = VAR_STRING;
13881 
13882     p = get_tv_string(&argvars[0]);
13883     if (argvars[1].v_type == VAR_UNKNOWN)
13884 	seconds = time(NULL);
13885     else
13886 	seconds = (time_t)get_tv_number(&argvars[1]);
13887     curtime = localtime(&seconds);
13888     /* MSVC returns NULL for an invalid value of seconds. */
13889     if (curtime == NULL)
13890 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
13891     else
13892     {
13893 # ifdef FEAT_MBYTE
13894 	vimconv_T   conv;
13895 	char_u	    *enc;
13896 
13897 	conv.vc_type = CONV_NONE;
13898 	enc = enc_locale();
13899 	convert_setup(&conv, p_enc, enc);
13900 	if (conv.vc_type != CONV_NONE)
13901 	    p = string_convert(&conv, p, NULL);
13902 # endif
13903 	if (p != NULL)
13904 	    (void)strftime((char *)result_buf, sizeof(result_buf),
13905 							  (char *)p, curtime);
13906 	else
13907 	    result_buf[0] = NUL;
13908 
13909 # ifdef FEAT_MBYTE
13910 	if (conv.vc_type != CONV_NONE)
13911 	    vim_free(p);
13912 	convert_setup(&conv, enc, p_enc);
13913 	if (conv.vc_type != CONV_NONE)
13914 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
13915 	else
13916 # endif
13917 	    rettv->vval.v_string = vim_strsave(result_buf);
13918 
13919 # ifdef FEAT_MBYTE
13920 	/* Release conversion descriptors */
13921 	convert_setup(&conv, NULL, NULL);
13922 	vim_free(enc);
13923 # endif
13924     }
13925 }
13926 #endif
13927 
13928 /*
13929  * "stridx()" function
13930  */
13931     static void
13932 f_stridx(argvars, rettv)
13933     typval_T	*argvars;
13934     typval_T	*rettv;
13935 {
13936     char_u	buf[NUMBUFLEN];
13937     char_u	*needle;
13938     char_u	*haystack;
13939     char_u	*save_haystack;
13940     char_u	*pos;
13941     int		start_idx;
13942 
13943     needle = get_tv_string_chk(&argvars[1]);
13944     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
13945     rettv->vval.v_number = -1;
13946     if (needle == NULL || haystack == NULL)
13947 	return;		/* type error; errmsg already given */
13948 
13949     if (argvars[2].v_type != VAR_UNKNOWN)
13950     {
13951 	int	    error = FALSE;
13952 
13953 	start_idx = get_tv_number_chk(&argvars[2], &error);
13954 	if (error || start_idx >= (int)STRLEN(haystack))
13955 	    return;
13956 	if (start_idx >= 0)
13957 	    haystack += start_idx;
13958     }
13959 
13960     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
13961     if (pos != NULL)
13962 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
13963 }
13964 
13965 /*
13966  * "string()" function
13967  */
13968     static void
13969 f_string(argvars, rettv)
13970     typval_T	*argvars;
13971     typval_T	*rettv;
13972 {
13973     char_u	*tofree;
13974     char_u	numbuf[NUMBUFLEN];
13975 
13976     rettv->v_type = VAR_STRING;
13977     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
13978     if (tofree == NULL)
13979 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
13980 }
13981 
13982 /*
13983  * "strlen()" function
13984  */
13985     static void
13986 f_strlen(argvars, rettv)
13987     typval_T	*argvars;
13988     typval_T	*rettv;
13989 {
13990     rettv->vval.v_number = (varnumber_T)(STRLEN(
13991 					      get_tv_string(&argvars[0])));
13992 }
13993 
13994 /*
13995  * "strpart()" function
13996  */
13997     static void
13998 f_strpart(argvars, rettv)
13999     typval_T	*argvars;
14000     typval_T	*rettv;
14001 {
14002     char_u	*p;
14003     int		n;
14004     int		len;
14005     int		slen;
14006     int		error = FALSE;
14007 
14008     p = get_tv_string(&argvars[0]);
14009     slen = (int)STRLEN(p);
14010 
14011     n = get_tv_number_chk(&argvars[1], &error);
14012     if (error)
14013 	len = 0;
14014     else if (argvars[2].v_type != VAR_UNKNOWN)
14015 	len = get_tv_number(&argvars[2]);
14016     else
14017 	len = slen - n;	    /* default len: all bytes that are available. */
14018 
14019     /*
14020      * Only return the overlap between the specified part and the actual
14021      * string.
14022      */
14023     if (n < 0)
14024     {
14025 	len += n;
14026 	n = 0;
14027     }
14028     else if (n > slen)
14029 	n = slen;
14030     if (len < 0)
14031 	len = 0;
14032     else if (n + len > slen)
14033 	len = slen - n;
14034 
14035     rettv->v_type = VAR_STRING;
14036     rettv->vval.v_string = vim_strnsave(p + n, len);
14037 }
14038 
14039 /*
14040  * "strridx()" function
14041  */
14042     static void
14043 f_strridx(argvars, rettv)
14044     typval_T	*argvars;
14045     typval_T	*rettv;
14046 {
14047     char_u	buf[NUMBUFLEN];
14048     char_u	*needle;
14049     char_u	*haystack;
14050     char_u	*rest;
14051     char_u	*lastmatch = NULL;
14052     int		haystack_len, end_idx;
14053 
14054     needle = get_tv_string_chk(&argvars[1]);
14055     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14056     haystack_len = STRLEN(haystack);
14057 
14058     rettv->vval.v_number = -1;
14059     if (needle == NULL || haystack == NULL)
14060 	return;		/* type error; errmsg already given */
14061     if (argvars[2].v_type != VAR_UNKNOWN)
14062     {
14063 	/* Third argument: upper limit for index */
14064 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14065 	if (end_idx < 0)
14066 	    return;	/* can never find a match */
14067     }
14068     else
14069 	end_idx = haystack_len;
14070 
14071     if (*needle == NUL)
14072     {
14073 	/* Empty string matches past the end. */
14074 	lastmatch = haystack + end_idx;
14075     }
14076     else
14077     {
14078 	for (rest = haystack; *rest != '\0'; ++rest)
14079 	{
14080 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14081 	    if (rest == NULL || rest > haystack + end_idx)
14082 		break;
14083 	    lastmatch = rest;
14084 	}
14085     }
14086 
14087     if (lastmatch == NULL)
14088 	rettv->vval.v_number = -1;
14089     else
14090 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14091 }
14092 
14093 /*
14094  * "strtrans()" function
14095  */
14096     static void
14097 f_strtrans(argvars, rettv)
14098     typval_T	*argvars;
14099     typval_T	*rettv;
14100 {
14101     rettv->v_type = VAR_STRING;
14102     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14103 }
14104 
14105 /*
14106  * "submatch()" function
14107  */
14108     static void
14109 f_submatch(argvars, rettv)
14110     typval_T	*argvars;
14111     typval_T	*rettv;
14112 {
14113     rettv->v_type = VAR_STRING;
14114     rettv->vval.v_string =
14115 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14116 }
14117 
14118 /*
14119  * "substitute()" function
14120  */
14121     static void
14122 f_substitute(argvars, rettv)
14123     typval_T	*argvars;
14124     typval_T	*rettv;
14125 {
14126     char_u	patbuf[NUMBUFLEN];
14127     char_u	subbuf[NUMBUFLEN];
14128     char_u	flagsbuf[NUMBUFLEN];
14129 
14130     char_u	*str = get_tv_string_chk(&argvars[0]);
14131     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14132     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14133     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14134 
14135     rettv->v_type = VAR_STRING;
14136     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14137 	rettv->vval.v_string = NULL;
14138     else
14139 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14140 }
14141 
14142 /*
14143  * "synID(lnum, col, trans)" function
14144  */
14145 /*ARGSUSED*/
14146     static void
14147 f_synID(argvars, rettv)
14148     typval_T	*argvars;
14149     typval_T	*rettv;
14150 {
14151     int		id = 0;
14152 #ifdef FEAT_SYN_HL
14153     long	lnum;
14154     long	col;
14155     int		trans;
14156     int		transerr = FALSE;
14157 
14158     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14159     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14160     trans = get_tv_number_chk(&argvars[2], &transerr);
14161 
14162     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14163 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14164 	id = syn_get_id(lnum, (colnr_T)col, trans, NULL);
14165 #endif
14166 
14167     rettv->vval.v_number = id;
14168 }
14169 
14170 /*
14171  * "synIDattr(id, what [, mode])" function
14172  */
14173 /*ARGSUSED*/
14174     static void
14175 f_synIDattr(argvars, rettv)
14176     typval_T	*argvars;
14177     typval_T	*rettv;
14178 {
14179     char_u	*p = NULL;
14180 #ifdef FEAT_SYN_HL
14181     int		id;
14182     char_u	*what;
14183     char_u	*mode;
14184     char_u	modebuf[NUMBUFLEN];
14185     int		modec;
14186 
14187     id = get_tv_number(&argvars[0]);
14188     what = get_tv_string(&argvars[1]);
14189     if (argvars[2].v_type != VAR_UNKNOWN)
14190     {
14191 	mode = get_tv_string_buf(&argvars[2], modebuf);
14192 	modec = TOLOWER_ASC(mode[0]);
14193 	if (modec != 't' && modec != 'c'
14194 #ifdef FEAT_GUI
14195 		&& modec != 'g'
14196 #endif
14197 		)
14198 	    modec = 0;	/* replace invalid with current */
14199     }
14200     else
14201     {
14202 #ifdef FEAT_GUI
14203 	if (gui.in_use)
14204 	    modec = 'g';
14205 	else
14206 #endif
14207 	    if (t_colors > 1)
14208 	    modec = 'c';
14209 	else
14210 	    modec = 't';
14211     }
14212 
14213 
14214     switch (TOLOWER_ASC(what[0]))
14215     {
14216 	case 'b':
14217 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14218 		    p = highlight_color(id, what, modec);
14219 		else					/* bold */
14220 		    p = highlight_has_attr(id, HL_BOLD, modec);
14221 		break;
14222 
14223 	case 'f':					/* fg[#] */
14224 		p = highlight_color(id, what, modec);
14225 		break;
14226 
14227 	case 'i':
14228 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14229 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14230 		else					/* italic */
14231 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14232 		break;
14233 
14234 	case 'n':					/* name */
14235 		p = get_highlight_name(NULL, id - 1);
14236 		break;
14237 
14238 	case 'r':					/* reverse */
14239 		p = highlight_has_attr(id, HL_INVERSE, modec);
14240 		break;
14241 
14242 	case 's':					/* standout */
14243 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14244 		break;
14245 
14246 	case 'u':
14247 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14248 							/* underline */
14249 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14250 		else
14251 							/* undercurl */
14252 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14253 		break;
14254     }
14255 
14256     if (p != NULL)
14257 	p = vim_strsave(p);
14258 #endif
14259     rettv->v_type = VAR_STRING;
14260     rettv->vval.v_string = p;
14261 }
14262 
14263 /*
14264  * "synIDtrans(id)" function
14265  */
14266 /*ARGSUSED*/
14267     static void
14268 f_synIDtrans(argvars, rettv)
14269     typval_T	*argvars;
14270     typval_T	*rettv;
14271 {
14272     int		id;
14273 
14274 #ifdef FEAT_SYN_HL
14275     id = get_tv_number(&argvars[0]);
14276 
14277     if (id > 0)
14278 	id = syn_get_final_id(id);
14279     else
14280 #endif
14281 	id = 0;
14282 
14283     rettv->vval.v_number = id;
14284 }
14285 
14286 /*
14287  * "system()" function
14288  */
14289     static void
14290 f_system(argvars, rettv)
14291     typval_T	*argvars;
14292     typval_T	*rettv;
14293 {
14294     char_u	*res = NULL;
14295     char_u	*p;
14296     char_u	*infile = NULL;
14297     char_u	buf[NUMBUFLEN];
14298     int		err = FALSE;
14299     FILE	*fd;
14300 
14301     if (argvars[1].v_type != VAR_UNKNOWN)
14302     {
14303 	/*
14304 	 * Write the string to a temp file, to be used for input of the shell
14305 	 * command.
14306 	 */
14307 	if ((infile = vim_tempname('i')) == NULL)
14308 	{
14309 	    EMSG(_(e_notmp));
14310 	    return;
14311 	}
14312 
14313 	fd = mch_fopen((char *)infile, WRITEBIN);
14314 	if (fd == NULL)
14315 	{
14316 	    EMSG2(_(e_notopen), infile);
14317 	    goto done;
14318 	}
14319 	p = get_tv_string_buf_chk(&argvars[1], buf);
14320 	if (p == NULL)
14321 	    goto done;		/* type error; errmsg already given */
14322 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14323 	    err = TRUE;
14324 	if (fclose(fd) != 0)
14325 	    err = TRUE;
14326 	if (err)
14327 	{
14328 	    EMSG(_("E677: Error writing temp file"));
14329 	    goto done;
14330 	}
14331     }
14332 
14333     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14334 
14335 #ifdef USE_CR
14336     /* translate <CR> into <NL> */
14337     if (res != NULL)
14338     {
14339 	char_u	*s;
14340 
14341 	for (s = res; *s; ++s)
14342 	{
14343 	    if (*s == CAR)
14344 		*s = NL;
14345 	}
14346     }
14347 #else
14348 # ifdef USE_CRNL
14349     /* translate <CR><NL> into <NL> */
14350     if (res != NULL)
14351     {
14352 	char_u	*s, *d;
14353 
14354 	d = res;
14355 	for (s = res; *s; ++s)
14356 	{
14357 	    if (s[0] == CAR && s[1] == NL)
14358 		++s;
14359 	    *d++ = *s;
14360 	}
14361 	*d = NUL;
14362     }
14363 # endif
14364 #endif
14365 
14366 done:
14367     if (infile != NULL)
14368     {
14369 	mch_remove(infile);
14370 	vim_free(infile);
14371     }
14372     rettv->v_type = VAR_STRING;
14373     rettv->vval.v_string = res;
14374 }
14375 
14376 /*
14377  * "taglist()" function
14378  */
14379     static void
14380 f_taglist(argvars, rettv)
14381     typval_T  *argvars;
14382     typval_T  *rettv;
14383 {
14384     char_u  *tag_pattern;
14385     list_T  *l;
14386 
14387     tag_pattern = get_tv_string(&argvars[0]);
14388 
14389     rettv->vval.v_number = FALSE;
14390     if (*tag_pattern == NUL)
14391 	return;
14392 
14393     l = list_alloc();
14394     if (l != NULL)
14395     {
14396 	if (get_tags(l, tag_pattern) != FAIL)
14397 	{
14398 	    rettv->vval.v_list = l;
14399 	    rettv->v_type = VAR_LIST;
14400 	    ++l->lv_refcount;
14401 	}
14402 	else
14403 	    list_free(l);
14404     }
14405 }
14406 
14407 /*
14408  * "tempname()" function
14409  */
14410 /*ARGSUSED*/
14411     static void
14412 f_tempname(argvars, rettv)
14413     typval_T	*argvars;
14414     typval_T	*rettv;
14415 {
14416     static int	x = 'A';
14417 
14418     rettv->v_type = VAR_STRING;
14419     rettv->vval.v_string = vim_tempname(x);
14420 
14421     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14422      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14423     do
14424     {
14425 	if (x == 'Z')
14426 	    x = '0';
14427 	else if (x == '9')
14428 	    x = 'A';
14429 	else
14430 	{
14431 #ifdef EBCDIC
14432 	    if (x == 'I')
14433 		x = 'J';
14434 	    else if (x == 'R')
14435 		x = 'S';
14436 	    else
14437 #endif
14438 		++x;
14439 	}
14440     } while (x == 'I' || x == 'O');
14441 }
14442 
14443 /*
14444  * "tolower(string)" function
14445  */
14446     static void
14447 f_tolower(argvars, rettv)
14448     typval_T	*argvars;
14449     typval_T	*rettv;
14450 {
14451     char_u	*p;
14452 
14453     p = vim_strsave(get_tv_string(&argvars[0]));
14454     rettv->v_type = VAR_STRING;
14455     rettv->vval.v_string = p;
14456 
14457     if (p != NULL)
14458 	while (*p != NUL)
14459 	{
14460 #ifdef FEAT_MBYTE
14461 	    int		l;
14462 
14463 	    if (enc_utf8)
14464 	    {
14465 		int c, lc;
14466 
14467 		c = utf_ptr2char(p);
14468 		lc = utf_tolower(c);
14469 		l = utf_ptr2len_check(p);
14470 		/* TODO: reallocate string when byte count changes. */
14471 		if (utf_char2len(lc) == l)
14472 		    utf_char2bytes(lc, p);
14473 		p += l;
14474 	    }
14475 	    else if (has_mbyte && (l = (*mb_ptr2len_check)(p)) > 1)
14476 		p += l;		/* skip multi-byte character */
14477 	    else
14478 #endif
14479 	    {
14480 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14481 		++p;
14482 	    }
14483 	}
14484 }
14485 
14486 /*
14487  * "toupper(string)" function
14488  */
14489     static void
14490 f_toupper(argvars, rettv)
14491     typval_T	*argvars;
14492     typval_T	*rettv;
14493 {
14494     rettv->v_type = VAR_STRING;
14495     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14496 }
14497 
14498 /*
14499  * "tr(string, fromstr, tostr)" function
14500  */
14501     static void
14502 f_tr(argvars, rettv)
14503     typval_T	*argvars;
14504     typval_T	*rettv;
14505 {
14506     char_u	*instr;
14507     char_u	*fromstr;
14508     char_u	*tostr;
14509     char_u	*p;
14510 #ifdef FEAT_MBYTE
14511     int		inlen;
14512     int		fromlen;
14513     int		tolen;
14514     int		idx;
14515     char_u	*cpstr;
14516     int		cplen;
14517     int		first = TRUE;
14518 #endif
14519     char_u	buf[NUMBUFLEN];
14520     char_u	buf2[NUMBUFLEN];
14521     garray_T	ga;
14522 
14523     instr = get_tv_string(&argvars[0]);
14524     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14525     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14526 
14527     /* Default return value: empty string. */
14528     rettv->v_type = VAR_STRING;
14529     rettv->vval.v_string = NULL;
14530     if (fromstr == NULL || tostr == NULL)
14531 	    return;		/* type error; errmsg already given */
14532     ga_init2(&ga, (int)sizeof(char), 80);
14533 
14534 #ifdef FEAT_MBYTE
14535     if (!has_mbyte)
14536 #endif
14537 	/* not multi-byte: fromstr and tostr must be the same length */
14538 	if (STRLEN(fromstr) != STRLEN(tostr))
14539 	{
14540 #ifdef FEAT_MBYTE
14541 error:
14542 #endif
14543 	    EMSG2(_(e_invarg2), fromstr);
14544 	    ga_clear(&ga);
14545 	    return;
14546 	}
14547 
14548     /* fromstr and tostr have to contain the same number of chars */
14549     while (*instr != NUL)
14550     {
14551 #ifdef FEAT_MBYTE
14552 	if (has_mbyte)
14553 	{
14554 	    inlen = mb_ptr2len_check(instr);
14555 	    cpstr = instr;
14556 	    cplen = inlen;
14557 	    idx = 0;
14558 	    for (p = fromstr; *p != NUL; p += fromlen)
14559 	    {
14560 		fromlen = mb_ptr2len_check(p);
14561 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14562 		{
14563 		    for (p = tostr; *p != NUL; p += tolen)
14564 		    {
14565 			tolen = mb_ptr2len_check(p);
14566 			if (idx-- == 0)
14567 			{
14568 			    cplen = tolen;
14569 			    cpstr = p;
14570 			    break;
14571 			}
14572 		    }
14573 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14574 			goto error;
14575 		    break;
14576 		}
14577 		++idx;
14578 	    }
14579 
14580 	    if (first && cpstr == instr)
14581 	    {
14582 		/* Check that fromstr and tostr have the same number of
14583 		 * (multi-byte) characters.  Done only once when a character
14584 		 * of instr doesn't appear in fromstr. */
14585 		first = FALSE;
14586 		for (p = tostr; *p != NUL; p += tolen)
14587 		{
14588 		    tolen = mb_ptr2len_check(p);
14589 		    --idx;
14590 		}
14591 		if (idx != 0)
14592 		    goto error;
14593 	    }
14594 
14595 	    ga_grow(&ga, cplen);
14596 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14597 	    ga.ga_len += cplen;
14598 
14599 	    instr += inlen;
14600 	}
14601 	else
14602 #endif
14603 	{
14604 	    /* When not using multi-byte chars we can do it faster. */
14605 	    p = vim_strchr(fromstr, *instr);
14606 	    if (p != NULL)
14607 		ga_append(&ga, tostr[p - fromstr]);
14608 	    else
14609 		ga_append(&ga, *instr);
14610 	    ++instr;
14611 	}
14612     }
14613 
14614     rettv->vval.v_string = ga.ga_data;
14615 }
14616 
14617 /*
14618  * "type(expr)" function
14619  */
14620     static void
14621 f_type(argvars, rettv)
14622     typval_T	*argvars;
14623     typval_T	*rettv;
14624 {
14625     int n;
14626 
14627     switch (argvars[0].v_type)
14628     {
14629 	case VAR_NUMBER: n = 0; break;
14630 	case VAR_STRING: n = 1; break;
14631 	case VAR_FUNC:   n = 2; break;
14632 	case VAR_LIST:   n = 3; break;
14633 	case VAR_DICT:   n = 4; break;
14634 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14635     }
14636     rettv->vval.v_number = n;
14637 }
14638 
14639 /*
14640  * "values(dict)" function
14641  */
14642     static void
14643 f_values(argvars, rettv)
14644     typval_T	*argvars;
14645     typval_T	*rettv;
14646 {
14647     dict_list(argvars, rettv, 1);
14648 }
14649 
14650 /*
14651  * "virtcol(string)" function
14652  */
14653     static void
14654 f_virtcol(argvars, rettv)
14655     typval_T	*argvars;
14656     typval_T	*rettv;
14657 {
14658     colnr_T	vcol = 0;
14659     pos_T	*fp;
14660 
14661     fp = var2fpos(&argvars[0], FALSE);
14662     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14663     {
14664 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14665 	++vcol;
14666     }
14667 
14668     rettv->vval.v_number = vcol;
14669 }
14670 
14671 /*
14672  * "visualmode()" function
14673  */
14674 /*ARGSUSED*/
14675     static void
14676 f_visualmode(argvars, rettv)
14677     typval_T	*argvars;
14678     typval_T	*rettv;
14679 {
14680 #ifdef FEAT_VISUAL
14681     char_u	str[2];
14682 
14683     rettv->v_type = VAR_STRING;
14684     str[0] = curbuf->b_visual_mode_eval;
14685     str[1] = NUL;
14686     rettv->vval.v_string = vim_strsave(str);
14687 
14688     /* A non-zero number or non-empty string argument: reset mode. */
14689     if ((argvars[0].v_type == VAR_NUMBER
14690 		&& argvars[0].vval.v_number != 0)
14691 	    || (argvars[0].v_type == VAR_STRING
14692 		&& *get_tv_string(&argvars[0]) != NUL))
14693 	curbuf->b_visual_mode_eval = NUL;
14694 #else
14695     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14696 #endif
14697 }
14698 
14699 /*
14700  * "winbufnr(nr)" function
14701  */
14702     static void
14703 f_winbufnr(argvars, rettv)
14704     typval_T	*argvars;
14705     typval_T	*rettv;
14706 {
14707     win_T	*wp;
14708 
14709     wp = find_win_by_nr(&argvars[0]);
14710     if (wp == NULL)
14711 	rettv->vval.v_number = -1;
14712     else
14713 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14714 }
14715 
14716 /*
14717  * "wincol()" function
14718  */
14719 /*ARGSUSED*/
14720     static void
14721 f_wincol(argvars, rettv)
14722     typval_T	*argvars;
14723     typval_T	*rettv;
14724 {
14725     validate_cursor();
14726     rettv->vval.v_number = curwin->w_wcol + 1;
14727 }
14728 
14729 /*
14730  * "winheight(nr)" function
14731  */
14732     static void
14733 f_winheight(argvars, rettv)
14734     typval_T	*argvars;
14735     typval_T	*rettv;
14736 {
14737     win_T	*wp;
14738 
14739     wp = find_win_by_nr(&argvars[0]);
14740     if (wp == NULL)
14741 	rettv->vval.v_number = -1;
14742     else
14743 	rettv->vval.v_number = wp->w_height;
14744 }
14745 
14746 /*
14747  * "winline()" function
14748  */
14749 /*ARGSUSED*/
14750     static void
14751 f_winline(argvars, rettv)
14752     typval_T	*argvars;
14753     typval_T	*rettv;
14754 {
14755     validate_cursor();
14756     rettv->vval.v_number = curwin->w_wrow + 1;
14757 }
14758 
14759 /*
14760  * "winnr()" function
14761  */
14762 /* ARGSUSED */
14763     static void
14764 f_winnr(argvars, rettv)
14765     typval_T	*argvars;
14766     typval_T	*rettv;
14767 {
14768     int		nr = 1;
14769 #ifdef FEAT_WINDOWS
14770     win_T	*wp;
14771     win_T	*twin = curwin;
14772     char_u	*arg;
14773 
14774     if (argvars[0].v_type != VAR_UNKNOWN)
14775     {
14776 	arg = get_tv_string_chk(&argvars[0]);
14777 	if (arg == NULL)
14778 	    nr = 0;		/* type error; errmsg already given */
14779 	else if (STRCMP(arg, "$") == 0)
14780 	    twin = lastwin;
14781 	else if (STRCMP(arg, "#") == 0)
14782 	{
14783 	    twin = prevwin;
14784 	    if (prevwin == NULL)
14785 		nr = 0;
14786 	}
14787 	else
14788 	{
14789 	    EMSG2(_(e_invexpr2), arg);
14790 	    nr = 0;
14791 	}
14792     }
14793 
14794     if (nr > 0)
14795 	for (wp = firstwin; wp != twin; wp = wp->w_next)
14796 	    ++nr;
14797 #endif
14798     rettv->vval.v_number = nr;
14799 }
14800 
14801 /*
14802  * "winrestcmd()" function
14803  */
14804 /* ARGSUSED */
14805     static void
14806 f_winrestcmd(argvars, rettv)
14807     typval_T	*argvars;
14808     typval_T	*rettv;
14809 {
14810 #ifdef FEAT_WINDOWS
14811     win_T	*wp;
14812     int		winnr = 1;
14813     garray_T	ga;
14814     char_u	buf[50];
14815 
14816     ga_init2(&ga, (int)sizeof(char), 70);
14817     for (wp = firstwin; wp != NULL; wp = wp->w_next)
14818     {
14819 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
14820 	ga_concat(&ga, buf);
14821 # ifdef FEAT_VERTSPLIT
14822 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
14823 	ga_concat(&ga, buf);
14824 # endif
14825 	++winnr;
14826     }
14827     ga_append(&ga, NUL);
14828 
14829     rettv->vval.v_string = ga.ga_data;
14830 #else
14831     rettv->vval.v_string = NULL;
14832 #endif
14833     rettv->v_type = VAR_STRING;
14834 }
14835 
14836 /*
14837  * "winwidth(nr)" function
14838  */
14839     static void
14840 f_winwidth(argvars, rettv)
14841     typval_T	*argvars;
14842     typval_T	*rettv;
14843 {
14844     win_T	*wp;
14845 
14846     wp = find_win_by_nr(&argvars[0]);
14847     if (wp == NULL)
14848 	rettv->vval.v_number = -1;
14849     else
14850 #ifdef FEAT_VERTSPLIT
14851 	rettv->vval.v_number = wp->w_width;
14852 #else
14853 	rettv->vval.v_number = Columns;
14854 #endif
14855 }
14856 
14857 /*
14858  * "writefile()" function
14859  */
14860     static void
14861 f_writefile(argvars, rettv)
14862     typval_T	*argvars;
14863     typval_T	*rettv;
14864 {
14865     int		binary = FALSE;
14866     char_u	*fname;
14867     FILE	*fd;
14868     listitem_T	*li;
14869     char_u	*s;
14870     int		ret = 0;
14871     int		c;
14872 
14873     if (argvars[0].v_type != VAR_LIST)
14874     {
14875 	EMSG2(_(e_listarg), "writefile()");
14876 	return;
14877     }
14878     if (argvars[0].vval.v_list == NULL)
14879 	return;
14880 
14881     if (argvars[2].v_type != VAR_UNKNOWN
14882 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
14883 	binary = TRUE;
14884 
14885     /* Always open the file in binary mode, library functions have a mind of
14886      * their own about CR-LF conversion. */
14887     fname = get_tv_string(&argvars[1]);
14888     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
14889     {
14890 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
14891 	ret = -1;
14892     }
14893     else
14894     {
14895 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
14896 							     li = li->li_next)
14897 	{
14898 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
14899 	    {
14900 		if (*s == '\n')
14901 		    c = putc(NUL, fd);
14902 		else
14903 		    c = putc(*s, fd);
14904 		if (c == EOF)
14905 		{
14906 		    ret = -1;
14907 		    break;
14908 		}
14909 	    }
14910 	    if (!binary || li->li_next != NULL)
14911 		if (putc('\n', fd) == EOF)
14912 		{
14913 		    ret = -1;
14914 		    break;
14915 		}
14916 	    if (ret < 0)
14917 	    {
14918 		EMSG(_(e_write));
14919 		break;
14920 	    }
14921 	}
14922 	fclose(fd);
14923     }
14924 
14925     rettv->vval.v_number = ret;
14926 }
14927 
14928 /*
14929  * Translate a String variable into a position.
14930  */
14931     static pos_T *
14932 var2fpos(varp, lnum)
14933     typval_T	*varp;
14934     int		lnum;		/* TRUE when $ is last line */
14935 {
14936     char_u	*name;
14937     static pos_T	pos;
14938     pos_T	*pp;
14939 
14940     name = get_tv_string_chk(varp);
14941     if (name == NULL)
14942 	return NULL;
14943     if (name[0] == '.')		/* cursor */
14944 	return &curwin->w_cursor;
14945     if (name[0] == '\'')	/* mark */
14946     {
14947 	pp = getmark(name[1], FALSE);
14948 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
14949 	    return NULL;
14950 	return pp;
14951     }
14952     if (name[0] == '$')		/* last column or line */
14953     {
14954 	if (lnum)
14955 	{
14956 	    pos.lnum = curbuf->b_ml.ml_line_count;
14957 	    pos.col = 0;
14958 	}
14959 	else
14960 	{
14961 	    pos.lnum = curwin->w_cursor.lnum;
14962 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
14963 	}
14964 	return &pos;
14965     }
14966     return NULL;
14967 }
14968 
14969 /*
14970  * Get the length of an environment variable name.
14971  * Advance "arg" to the first character after the name.
14972  * Return 0 for error.
14973  */
14974     static int
14975 get_env_len(arg)
14976     char_u	**arg;
14977 {
14978     char_u	*p;
14979     int		len;
14980 
14981     for (p = *arg; vim_isIDc(*p); ++p)
14982 	;
14983     if (p == *arg)	    /* no name found */
14984 	return 0;
14985 
14986     len = (int)(p - *arg);
14987     *arg = p;
14988     return len;
14989 }
14990 
14991 /*
14992  * Get the length of the name of a function or internal variable.
14993  * "arg" is advanced to the first non-white character after the name.
14994  * Return 0 if something is wrong.
14995  */
14996     static int
14997 get_id_len(arg)
14998     char_u	**arg;
14999 {
15000     char_u	*p;
15001     int		len;
15002 
15003     /* Find the end of the name. */
15004     for (p = *arg; eval_isnamec(*p); ++p)
15005 	;
15006     if (p == *arg)	    /* no name found */
15007 	return 0;
15008 
15009     len = (int)(p - *arg);
15010     *arg = skipwhite(p);
15011 
15012     return len;
15013 }
15014 
15015 /*
15016  * Get the length of the name of a variable or function.
15017  * Only the name is recognized, does not handle ".key" or "[idx]".
15018  * "arg" is advanced to the first non-white character after the name.
15019  * Return -1 if curly braces expansion failed.
15020  * Return 0 if something else is wrong.
15021  * If the name contains 'magic' {}'s, expand them and return the
15022  * expanded name in an allocated string via 'alias' - caller must free.
15023  */
15024     static int
15025 get_name_len(arg, alias, evaluate, verbose)
15026     char_u	**arg;
15027     char_u	**alias;
15028     int		evaluate;
15029     int		verbose;
15030 {
15031     int		len;
15032     char_u	*p;
15033     char_u	*expr_start;
15034     char_u	*expr_end;
15035 
15036     *alias = NULL;  /* default to no alias */
15037 
15038     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
15039 						  && (*arg)[2] == (int)KE_SNR)
15040     {
15041 	/* hard coded <SNR>, already translated */
15042 	*arg += 3;
15043 	return get_id_len(arg) + 3;
15044     }
15045     len = eval_fname_script(*arg);
15046     if (len > 0)
15047     {
15048 	/* literal "<SID>", "s:" or "<SNR>" */
15049 	*arg += len;
15050     }
15051 
15052     /*
15053      * Find the end of the name; check for {} construction.
15054      */
15055     p = find_name_end(*arg, &expr_start, &expr_end,
15056 					       len > 0 ? 0 : FNE_CHECK_START);
15057     if (expr_start != NULL)
15058     {
15059 	char_u	*temp_string;
15060 
15061 	if (!evaluate)
15062 	{
15063 	    len += (int)(p - *arg);
15064 	    *arg = skipwhite(p);
15065 	    return len;
15066 	}
15067 
15068 	/*
15069 	 * Include any <SID> etc in the expanded string:
15070 	 * Thus the -len here.
15071 	 */
15072 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15073 	if (temp_string == NULL)
15074 	    return -1;
15075 	*alias = temp_string;
15076 	*arg = skipwhite(p);
15077 	return (int)STRLEN(temp_string);
15078     }
15079 
15080     len += get_id_len(arg);
15081     if (len == 0 && verbose)
15082 	EMSG2(_(e_invexpr2), *arg);
15083 
15084     return len;
15085 }
15086 
15087 /*
15088  * Find the end of a variable or function name, taking care of magic braces.
15089  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15090  * start and end of the first magic braces item.
15091  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15092  * Return a pointer to just after the name.  Equal to "arg" if there is no
15093  * valid name.
15094  */
15095     static char_u *
15096 find_name_end(arg, expr_start, expr_end, flags)
15097     char_u	*arg;
15098     char_u	**expr_start;
15099     char_u	**expr_end;
15100     int		flags;
15101 {
15102     int		mb_nest = 0;
15103     int		br_nest = 0;
15104     char_u	*p;
15105 
15106     if (expr_start != NULL)
15107     {
15108 	*expr_start = NULL;
15109 	*expr_end = NULL;
15110     }
15111 
15112     /* Quick check for valid starting character. */
15113     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15114 	return arg;
15115 
15116     for (p = arg; *p != NUL
15117 		    && (eval_isnamec(*p)
15118 			|| *p == '{'
15119 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15120 			|| mb_nest != 0
15121 			|| br_nest != 0); ++p)
15122     {
15123 	if (mb_nest == 0)
15124 	{
15125 	    if (*p == '[')
15126 		++br_nest;
15127 	    else if (*p == ']')
15128 		--br_nest;
15129 	}
15130 	if (br_nest == 0)
15131 	{
15132 	    if (*p == '{')
15133 	    {
15134 		mb_nest++;
15135 		if (expr_start != NULL && *expr_start == NULL)
15136 		    *expr_start = p;
15137 	    }
15138 	    else if (*p == '}')
15139 	    {
15140 		mb_nest--;
15141 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15142 		    *expr_end = p;
15143 	    }
15144 	}
15145     }
15146 
15147     return p;
15148 }
15149 
15150 /*
15151  * Expands out the 'magic' {}'s in a variable/function name.
15152  * Note that this can call itself recursively, to deal with
15153  * constructs like foo{bar}{baz}{bam}
15154  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15155  *			"in_start"      ^
15156  *			"expr_start"	   ^
15157  *			"expr_end"		 ^
15158  *			"in_end"			    ^
15159  *
15160  * Returns a new allocated string, which the caller must free.
15161  * Returns NULL for failure.
15162  */
15163     static char_u *
15164 make_expanded_name(in_start, expr_start, expr_end, in_end)
15165     char_u	*in_start;
15166     char_u	*expr_start;
15167     char_u	*expr_end;
15168     char_u	*in_end;
15169 {
15170     char_u	c1;
15171     char_u	*retval = NULL;
15172     char_u	*temp_result;
15173     char_u	*nextcmd = NULL;
15174 
15175     if (expr_end == NULL || in_end == NULL)
15176 	return NULL;
15177     *expr_start	= NUL;
15178     *expr_end = NUL;
15179     c1 = *in_end;
15180     *in_end = NUL;
15181 
15182     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15183     if (temp_result != NULL && nextcmd == NULL)
15184     {
15185 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15186 						   + (in_end - expr_end) + 1));
15187 	if (retval != NULL)
15188 	{
15189 	    STRCPY(retval, in_start);
15190 	    STRCAT(retval, temp_result);
15191 	    STRCAT(retval, expr_end + 1);
15192 	}
15193     }
15194     vim_free(temp_result);
15195 
15196     *in_end = c1;		/* put char back for error messages */
15197     *expr_start = '{';
15198     *expr_end = '}';
15199 
15200     if (retval != NULL)
15201     {
15202 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15203 	if (expr_start != NULL)
15204 	{
15205 	    /* Further expansion! */
15206 	    temp_result = make_expanded_name(retval, expr_start,
15207 						       expr_end, temp_result);
15208 	    vim_free(retval);
15209 	    retval = temp_result;
15210 	}
15211     }
15212 
15213     return retval;
15214 }
15215 
15216 /*
15217  * Return TRUE if character "c" can be used in a variable or function name.
15218  * Does not include '{' or '}' for magic braces.
15219  */
15220     static int
15221 eval_isnamec(c)
15222     int	    c;
15223 {
15224     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15225 }
15226 
15227 /*
15228  * Return TRUE if character "c" can be used as the first character in a
15229  * variable or function name (excluding '{' and '}').
15230  */
15231     static int
15232 eval_isnamec1(c)
15233     int	    c;
15234 {
15235     return (ASCII_ISALPHA(c) || c == '_');
15236 }
15237 
15238 /*
15239  * Set number v: variable to "val".
15240  */
15241     void
15242 set_vim_var_nr(idx, val)
15243     int		idx;
15244     long	val;
15245 {
15246     vimvars[idx].vv_nr = val;
15247 }
15248 
15249 /*
15250  * Get number v: variable value.
15251  */
15252     long
15253 get_vim_var_nr(idx)
15254     int		idx;
15255 {
15256     return vimvars[idx].vv_nr;
15257 }
15258 
15259 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15260 /*
15261  * Get string v: variable value.  Uses a static buffer, can only be used once.
15262  */
15263     char_u *
15264 get_vim_var_str(idx)
15265     int		idx;
15266 {
15267     return get_tv_string(&vimvars[idx].vv_tv);
15268 }
15269 #endif
15270 
15271 /*
15272  * Set v:count, v:count1 and v:prevcount.
15273  */
15274     void
15275 set_vcount(count, count1)
15276     long	count;
15277     long	count1;
15278 {
15279     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15280     vimvars[VV_COUNT].vv_nr = count;
15281     vimvars[VV_COUNT1].vv_nr = count1;
15282 }
15283 
15284 /*
15285  * Set string v: variable to a copy of "val".
15286  */
15287     void
15288 set_vim_var_string(idx, val, len)
15289     int		idx;
15290     char_u	*val;
15291     int		len;	    /* length of "val" to use or -1 (whole string) */
15292 {
15293     /* Need to do this (at least) once, since we can't initialize a union.
15294      * Will always be invoked when "v:progname" is set. */
15295     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15296 
15297     vim_free(vimvars[idx].vv_str);
15298     if (val == NULL)
15299 	vimvars[idx].vv_str = NULL;
15300     else if (len == -1)
15301 	vimvars[idx].vv_str = vim_strsave(val);
15302     else
15303 	vimvars[idx].vv_str = vim_strnsave(val, len);
15304 }
15305 
15306 /*
15307  * Set v:register if needed.
15308  */
15309     void
15310 set_reg_var(c)
15311     int		c;
15312 {
15313     char_u	regname;
15314 
15315     if (c == 0 || c == ' ')
15316 	regname = '"';
15317     else
15318 	regname = c;
15319     /* Avoid free/alloc when the value is already right. */
15320     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15321 	set_vim_var_string(VV_REG, &regname, 1);
15322 }
15323 
15324 /*
15325  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15326  * Otherwise, restore the value to "oldval" and return NULL.
15327  * Must always be called in pairs to save and restore v:exception!  Does not
15328  * take care of memory allocations.
15329  */
15330     char_u *
15331 v_exception(oldval)
15332     char_u	*oldval;
15333 {
15334     if (oldval == NULL)
15335 	return vimvars[VV_EXCEPTION].vv_str;
15336 
15337     vimvars[VV_EXCEPTION].vv_str = oldval;
15338     return NULL;
15339 }
15340 
15341 /*
15342  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15343  * Otherwise, restore the value to "oldval" and return NULL.
15344  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15345  * take care of memory allocations.
15346  */
15347     char_u *
15348 v_throwpoint(oldval)
15349     char_u	*oldval;
15350 {
15351     if (oldval == NULL)
15352 	return vimvars[VV_THROWPOINT].vv_str;
15353 
15354     vimvars[VV_THROWPOINT].vv_str = oldval;
15355     return NULL;
15356 }
15357 
15358 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15359 /*
15360  * Set v:cmdarg.
15361  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15362  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15363  * Must always be called in pairs!
15364  */
15365     char_u *
15366 set_cmdarg(eap, oldarg)
15367     exarg_T	*eap;
15368     char_u	*oldarg;
15369 {
15370     char_u	*oldval;
15371     char_u	*newval;
15372     unsigned	len;
15373 
15374     oldval = vimvars[VV_CMDARG].vv_str;
15375     if (eap == NULL)
15376     {
15377 	vim_free(oldval);
15378 	vimvars[VV_CMDARG].vv_str = oldarg;
15379 	return NULL;
15380     }
15381 
15382     if (eap->force_bin == FORCE_BIN)
15383 	len = 6;
15384     else if (eap->force_bin == FORCE_NOBIN)
15385 	len = 8;
15386     else
15387 	len = 0;
15388     if (eap->force_ff != 0)
15389 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15390 # ifdef FEAT_MBYTE
15391     if (eap->force_enc != 0)
15392 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15393 # endif
15394 
15395     newval = alloc(len + 1);
15396     if (newval == NULL)
15397 	return NULL;
15398 
15399     if (eap->force_bin == FORCE_BIN)
15400 	sprintf((char *)newval, " ++bin");
15401     else if (eap->force_bin == FORCE_NOBIN)
15402 	sprintf((char *)newval, " ++nobin");
15403     else
15404 	*newval = NUL;
15405     if (eap->force_ff != 0)
15406 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15407 						eap->cmd + eap->force_ff);
15408 # ifdef FEAT_MBYTE
15409     if (eap->force_enc != 0)
15410 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15411 					       eap->cmd + eap->force_enc);
15412 # endif
15413     vimvars[VV_CMDARG].vv_str = newval;
15414     return oldval;
15415 }
15416 #endif
15417 
15418 /*
15419  * Get the value of internal variable "name".
15420  * Return OK or FAIL.
15421  */
15422     static int
15423 get_var_tv(name, len, rettv, verbose)
15424     char_u	*name;
15425     int		len;		/* length of "name" */
15426     typval_T	*rettv;		/* NULL when only checking existence */
15427     int		verbose;	/* may give error message */
15428 {
15429     int		ret = OK;
15430     typval_T	*tv = NULL;
15431     typval_T	atv;
15432     dictitem_T	*v;
15433     int		cc;
15434 
15435     /* truncate the name, so that we can use strcmp() */
15436     cc = name[len];
15437     name[len] = NUL;
15438 
15439     /*
15440      * Check for "b:changedtick".
15441      */
15442     if (STRCMP(name, "b:changedtick") == 0)
15443     {
15444 	atv.v_type = VAR_NUMBER;
15445 	atv.vval.v_number = curbuf->b_changedtick;
15446 	tv = &atv;
15447     }
15448 
15449     /*
15450      * Check for user-defined variables.
15451      */
15452     else
15453     {
15454 	v = find_var(name, NULL);
15455 	if (v != NULL)
15456 	    tv = &v->di_tv;
15457     }
15458 
15459     if (tv == NULL)
15460     {
15461 	if (rettv != NULL && verbose)
15462 	    EMSG2(_(e_undefvar), name);
15463 	ret = FAIL;
15464     }
15465     else if (rettv != NULL)
15466 	copy_tv(tv, rettv);
15467 
15468     name[len] = cc;
15469 
15470     return ret;
15471 }
15472 
15473 /*
15474  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15475  * Also handle function call with Funcref variable: func(expr)
15476  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15477  */
15478     static int
15479 handle_subscript(arg, rettv, evaluate, verbose)
15480     char_u	**arg;
15481     typval_T	*rettv;
15482     int		evaluate;	/* do more than finding the end */
15483     int		verbose;	/* give error messages */
15484 {
15485     int		ret = OK;
15486     dict_T	*selfdict = NULL;
15487     char_u	*s;
15488     int		len;
15489     typval_T	functv;
15490 
15491     while (ret == OK
15492 	    && (**arg == '['
15493 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15494 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15495 	    && !vim_iswhite(*(*arg - 1)))
15496     {
15497 	if (**arg == '(')
15498 	{
15499 	    /* need to copy the funcref so that we can clear rettv */
15500 	    functv = *rettv;
15501 	    rettv->v_type = VAR_UNKNOWN;
15502 
15503 	    /* Invoke the function.  Recursive! */
15504 	    s = functv.vval.v_string;
15505 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15506 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15507 			&len, evaluate, selfdict);
15508 
15509 	    /* Clear the funcref afterwards, so that deleting it while
15510 	     * evaluating the arguments is possible (see test55). */
15511 	    clear_tv(&functv);
15512 
15513 	    /* Stop the expression evaluation when immediately aborting on
15514 	     * error, or when an interrupt occurred or an exception was thrown
15515 	     * but not caught. */
15516 	    if (aborting())
15517 	    {
15518 		if (ret == OK)
15519 		    clear_tv(rettv);
15520 		ret = FAIL;
15521 	    }
15522 	    dict_unref(selfdict);
15523 	    selfdict = NULL;
15524 	}
15525 	else /* **arg == '[' || **arg == '.' */
15526 	{
15527 	    dict_unref(selfdict);
15528 	    if (rettv->v_type == VAR_DICT)
15529 	    {
15530 		selfdict = rettv->vval.v_dict;
15531 		if (selfdict != NULL)
15532 		    ++selfdict->dv_refcount;
15533 	    }
15534 	    else
15535 		selfdict = NULL;
15536 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15537 	    {
15538 		clear_tv(rettv);
15539 		ret = FAIL;
15540 	    }
15541 	}
15542     }
15543     dict_unref(selfdict);
15544     return ret;
15545 }
15546 
15547 /*
15548  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15549  * value).
15550  */
15551     static typval_T *
15552 alloc_tv()
15553 {
15554     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15555 }
15556 
15557 /*
15558  * Allocate memory for a variable type-value, and assign a string to it.
15559  * The string "s" must have been allocated, it is consumed.
15560  * Return NULL for out of memory, the variable otherwise.
15561  */
15562     static typval_T *
15563 alloc_string_tv(s)
15564     char_u	*s;
15565 {
15566     typval_T	*rettv;
15567 
15568     rettv = alloc_tv();
15569     if (rettv != NULL)
15570     {
15571 	rettv->v_type = VAR_STRING;
15572 	rettv->vval.v_string = s;
15573     }
15574     else
15575 	vim_free(s);
15576     return rettv;
15577 }
15578 
15579 /*
15580  * Free the memory for a variable type-value.
15581  */
15582     static void
15583 free_tv(varp)
15584     typval_T *varp;
15585 {
15586     if (varp != NULL)
15587     {
15588 	switch (varp->v_type)
15589 	{
15590 	    case VAR_FUNC:
15591 		func_unref(varp->vval.v_string);
15592 		/*FALLTHROUGH*/
15593 	    case VAR_STRING:
15594 		vim_free(varp->vval.v_string);
15595 		break;
15596 	    case VAR_LIST:
15597 		list_unref(varp->vval.v_list);
15598 		break;
15599 	    case VAR_DICT:
15600 		dict_unref(varp->vval.v_dict);
15601 		break;
15602 	    case VAR_NUMBER:
15603 	    case VAR_UNKNOWN:
15604 		break;
15605 	    default:
15606 		EMSG2(_(e_intern2), "free_tv()");
15607 		break;
15608 	}
15609 	vim_free(varp);
15610     }
15611 }
15612 
15613 /*
15614  * Free the memory for a variable value and set the value to NULL or 0.
15615  */
15616     void
15617 clear_tv(varp)
15618     typval_T *varp;
15619 {
15620     if (varp != NULL)
15621     {
15622 	switch (varp->v_type)
15623 	{
15624 	    case VAR_FUNC:
15625 		func_unref(varp->vval.v_string);
15626 		/*FALLTHROUGH*/
15627 	    case VAR_STRING:
15628 		vim_free(varp->vval.v_string);
15629 		varp->vval.v_string = NULL;
15630 		break;
15631 	    case VAR_LIST:
15632 		list_unref(varp->vval.v_list);
15633 		varp->vval.v_list = NULL;
15634 		break;
15635 	    case VAR_DICT:
15636 		dict_unref(varp->vval.v_dict);
15637 		varp->vval.v_dict = NULL;
15638 		break;
15639 	    case VAR_NUMBER:
15640 		varp->vval.v_number = 0;
15641 		break;
15642 	    case VAR_UNKNOWN:
15643 		break;
15644 	    default:
15645 		EMSG2(_(e_intern2), "clear_tv()");
15646 	}
15647 	varp->v_lock = 0;
15648     }
15649 }
15650 
15651 /*
15652  * Set the value of a variable to NULL without freeing items.
15653  */
15654     static void
15655 init_tv(varp)
15656     typval_T *varp;
15657 {
15658     if (varp != NULL)
15659 	vim_memset(varp, 0, sizeof(typval_T));
15660 }
15661 
15662 /*
15663  * Get the number value of a variable.
15664  * If it is a String variable, uses vim_str2nr().
15665  * For incompatible types, return 0.
15666  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15667  * caller of incompatible types: it sets *denote to TRUE if "denote"
15668  * is not NULL or returns -1 otherwise.
15669  */
15670     static long
15671 get_tv_number(varp)
15672     typval_T	*varp;
15673 {
15674     int		error = FALSE;
15675 
15676     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15677 }
15678 
15679     long
15680 get_tv_number_chk(varp, denote)
15681     typval_T	*varp;
15682     int		*denote;
15683 {
15684     long	n = 0L;
15685 
15686     switch (varp->v_type)
15687     {
15688 	case VAR_NUMBER:
15689 	    return (long)(varp->vval.v_number);
15690 	case VAR_FUNC:
15691 	    EMSG(_("E703: Using a Funcref as a number"));
15692 	    break;
15693 	case VAR_STRING:
15694 	    if (varp->vval.v_string != NULL)
15695 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15696 							TRUE, TRUE, &n, NULL);
15697 	    return n;
15698 	case VAR_LIST:
15699 	    EMSG(_("E745: Using a List as a number"));
15700 	    break;
15701 	case VAR_DICT:
15702 	    EMSG(_("E728: Using a Dictionary as a number"));
15703 	    break;
15704 	default:
15705 	    EMSG2(_(e_intern2), "get_tv_number()");
15706 	    break;
15707     }
15708     if (denote == NULL)		/* useful for values that must be unsigned */
15709 	n = -1;
15710     else
15711 	*denote = TRUE;
15712     return n;
15713 }
15714 
15715 /*
15716  * Get the lnum from the first argument.
15717  * Also accepts ".", "$", etc., but that only works for the current buffer.
15718  * Returns -1 on error.
15719  */
15720     static linenr_T
15721 get_tv_lnum(argvars)
15722     typval_T	*argvars;
15723 {
15724     typval_T	rettv;
15725     linenr_T	lnum;
15726 
15727     lnum = get_tv_number_chk(&argvars[0], NULL);
15728     if (lnum == 0)  /* no valid number, try using line() */
15729     {
15730 	rettv.v_type = VAR_NUMBER;
15731 	f_line(argvars, &rettv);
15732 	lnum = rettv.vval.v_number;
15733 	clear_tv(&rettv);
15734     }
15735     return lnum;
15736 }
15737 
15738 /*
15739  * Get the lnum from the first argument.
15740  * Also accepts "$", then "buf" is used.
15741  * Returns 0 on error.
15742  */
15743     static linenr_T
15744 get_tv_lnum_buf(argvars, buf)
15745     typval_T	*argvars;
15746     buf_T	*buf;
15747 {
15748     if (argvars[0].v_type == VAR_STRING
15749 	    && argvars[0].vval.v_string != NULL
15750 	    && argvars[0].vval.v_string[0] == '$'
15751 	    && buf != NULL)
15752 	return buf->b_ml.ml_line_count;
15753     return get_tv_number_chk(&argvars[0], NULL);
15754 }
15755 
15756 /*
15757  * Get the string value of a variable.
15758  * If it is a Number variable, the number is converted into a string.
15759  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
15760  * get_tv_string_buf() uses a given buffer.
15761  * If the String variable has never been set, return an empty string.
15762  * Never returns NULL;
15763  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
15764  * NULL on error.
15765  */
15766     static char_u *
15767 get_tv_string(varp)
15768     typval_T	*varp;
15769 {
15770     static char_u   mybuf[NUMBUFLEN];
15771 
15772     return get_tv_string_buf(varp, mybuf);
15773 }
15774 
15775     static char_u *
15776 get_tv_string_buf(varp, buf)
15777     typval_T	*varp;
15778     char_u	*buf;
15779 {
15780     char_u	*res =  get_tv_string_buf_chk(varp, buf);
15781 
15782     return res != NULL ? res : (char_u *)"";
15783 }
15784 
15785     char_u *
15786 get_tv_string_chk(varp)
15787     typval_T	*varp;
15788 {
15789     static char_u   mybuf[NUMBUFLEN];
15790 
15791     return get_tv_string_buf_chk(varp, mybuf);
15792 }
15793 
15794     static char_u *
15795 get_tv_string_buf_chk(varp, buf)
15796     typval_T	*varp;
15797     char_u	*buf;
15798 {
15799     switch (varp->v_type)
15800     {
15801 	case VAR_NUMBER:
15802 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
15803 	    return buf;
15804 	case VAR_FUNC:
15805 	    EMSG(_("E729: using Funcref as a String"));
15806 	    break;
15807 	case VAR_LIST:
15808 	    EMSG(_("E730: using List as a String"));
15809 	    break;
15810 	case VAR_DICT:
15811 	    EMSG(_("E731: using Dictionary as a String"));
15812 	    break;
15813 	case VAR_STRING:
15814 	    if (varp->vval.v_string != NULL)
15815 		return varp->vval.v_string;
15816 	    return (char_u *)"";
15817 	default:
15818 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
15819 	    break;
15820     }
15821     return NULL;
15822 }
15823 
15824 /*
15825  * Find variable "name" in the list of variables.
15826  * Return a pointer to it if found, NULL if not found.
15827  * Careful: "a:0" variables don't have a name.
15828  * When "htp" is not NULL we are writing to the variable, set "htp" to the
15829  * hashtab_T used.
15830  */
15831     static dictitem_T *
15832 find_var(name, htp)
15833     char_u	*name;
15834     hashtab_T	**htp;
15835 {
15836     char_u	*varname;
15837     hashtab_T	*ht;
15838 
15839     ht = find_var_ht(name, &varname);
15840     if (htp != NULL)
15841 	*htp = ht;
15842     if (ht == NULL)
15843 	return NULL;
15844     return find_var_in_ht(ht, varname, htp != NULL);
15845 }
15846 
15847 /*
15848  * Find variable "varname" in hashtab "ht".
15849  * Returns NULL if not found.
15850  */
15851     static dictitem_T *
15852 find_var_in_ht(ht, varname, writing)
15853     hashtab_T	*ht;
15854     char_u	*varname;
15855     int		writing;
15856 {
15857     hashitem_T	*hi;
15858 
15859     if (*varname == NUL)
15860     {
15861 	/* Must be something like "s:", otherwise "ht" would be NULL. */
15862 	switch (varname[-2])
15863 	{
15864 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
15865 	    case 'g': return &globvars_var;
15866 	    case 'v': return &vimvars_var;
15867 	    case 'b': return &curbuf->b_bufvar;
15868 	    case 'w': return &curwin->w_winvar;
15869 	    case 'l': return current_funccal == NULL
15870 					? NULL : &current_funccal->l_vars_var;
15871 	    case 'a': return current_funccal == NULL
15872 				       ? NULL : &current_funccal->l_avars_var;
15873 	}
15874 	return NULL;
15875     }
15876 
15877     hi = hash_find(ht, varname);
15878     if (HASHITEM_EMPTY(hi))
15879     {
15880 	/* For global variables we may try auto-loading the script.  If it
15881 	 * worked find the variable again.  Don't auto-load a script if it was
15882 	 * loaded already, otherwise it would be loaded every time when
15883 	 * checking if a function name is a Funcref variable. */
15884 	if (ht == &globvarht && !writing
15885 			    && script_autoload(varname, FALSE) && !aborting())
15886 	    hi = hash_find(ht, varname);
15887 	if (HASHITEM_EMPTY(hi))
15888 	    return NULL;
15889     }
15890     return HI2DI(hi);
15891 }
15892 
15893 /*
15894  * Find the hashtab used for a variable name.
15895  * Set "varname" to the start of name without ':'.
15896  */
15897     static hashtab_T *
15898 find_var_ht(name, varname)
15899     char_u  *name;
15900     char_u  **varname;
15901 {
15902     hashitem_T	*hi;
15903 
15904     if (name[1] != ':')
15905     {
15906 	/* The name must not start with a colon or #. */
15907 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
15908 	    return NULL;
15909 	*varname = name;
15910 
15911 	/* "version" is "v:version" in all scopes */
15912 	hi = hash_find(&compat_hashtab, name);
15913 	if (!HASHITEM_EMPTY(hi))
15914 	    return &compat_hashtab;
15915 
15916 	if (current_funccal == NULL)
15917 	    return &globvarht;			/* global variable */
15918 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
15919     }
15920     *varname = name + 2;
15921     if (*name == 'g')				/* global variable */
15922 	return &globvarht;
15923     /* There must be no ':' or '#' in the rest of the name, unless g: is used
15924      */
15925     if (vim_strchr(name + 2, ':') != NULL
15926 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
15927 	return NULL;
15928     if (*name == 'b')				/* buffer variable */
15929 	return &curbuf->b_vars.dv_hashtab;
15930     if (*name == 'w')				/* window variable */
15931 	return &curwin->w_vars.dv_hashtab;
15932     if (*name == 'v')				/* v: variable */
15933 	return &vimvarht;
15934     if (*name == 'a' && current_funccal != NULL) /* function argument */
15935 	return &current_funccal->l_avars.dv_hashtab;
15936     if (*name == 'l' && current_funccal != NULL) /* local function variable */
15937 	return &current_funccal->l_vars.dv_hashtab;
15938     if (*name == 's'				/* script variable */
15939 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
15940 	return &SCRIPT_VARS(current_SID);
15941     return NULL;
15942 }
15943 
15944 /*
15945  * Get the string value of a (global/local) variable.
15946  * Returns NULL when it doesn't exist.
15947  */
15948     char_u *
15949 get_var_value(name)
15950     char_u	*name;
15951 {
15952     dictitem_T	*v;
15953 
15954     v = find_var(name, NULL);
15955     if (v == NULL)
15956 	return NULL;
15957     return get_tv_string(&v->di_tv);
15958 }
15959 
15960 /*
15961  * Allocate a new hashtab for a sourced script.  It will be used while
15962  * sourcing this script and when executing functions defined in the script.
15963  */
15964     void
15965 new_script_vars(id)
15966     scid_T id;
15967 {
15968     int		i;
15969     hashtab_T	*ht;
15970     scriptvar_T *sv;
15971 
15972     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
15973     {
15974 	/* Re-allocating ga_data means that an ht_array pointing to
15975 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
15976 	 * at its init value.  Also reset "v_dict", it's always the same. */
15977 	for (i = 1; i <= ga_scripts.ga_len; ++i)
15978 	{
15979 	    ht = &SCRIPT_VARS(i);
15980 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
15981 		ht->ht_array = ht->ht_smallarray;
15982 	    sv = &SCRIPT_SV(i);
15983 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
15984 	}
15985 
15986 	while (ga_scripts.ga_len < id)
15987 	{
15988 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
15989 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
15990 	    ++ga_scripts.ga_len;
15991 	}
15992     }
15993 }
15994 
15995 /*
15996  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
15997  * point to it.
15998  */
15999     void
16000 init_var_dict(dict, dict_var)
16001     dict_T	*dict;
16002     dictitem_T	*dict_var;
16003 {
16004     hash_init(&dict->dv_hashtab);
16005     dict->dv_refcount = 99999;
16006     dict_var->di_tv.vval.v_dict = dict;
16007     dict_var->di_tv.v_type = VAR_DICT;
16008     dict_var->di_tv.v_lock = VAR_FIXED;
16009     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
16010     dict_var->di_key[0] = NUL;
16011 }
16012 
16013 /*
16014  * Clean up a list of internal variables.
16015  * Frees all allocated variables and the value they contain.
16016  * Clears hashtab "ht", does not free it.
16017  */
16018     void
16019 vars_clear(ht)
16020     hashtab_T *ht;
16021 {
16022     vars_clear_ext(ht, TRUE);
16023 }
16024 
16025 /*
16026  * Like vars_clear(), but only free the value if "free_val" is TRUE.
16027  */
16028     static void
16029 vars_clear_ext(ht, free_val)
16030     hashtab_T	*ht;
16031     int		free_val;
16032 {
16033     int		todo;
16034     hashitem_T	*hi;
16035     dictitem_T	*v;
16036 
16037     hash_lock(ht);
16038     todo = ht->ht_used;
16039     for (hi = ht->ht_array; todo > 0; ++hi)
16040     {
16041 	if (!HASHITEM_EMPTY(hi))
16042 	{
16043 	    --todo;
16044 
16045 	    /* Free the variable.  Don't remove it from the hashtab,
16046 	     * ht_array might change then.  hash_clear() takes care of it
16047 	     * later. */
16048 	    v = HI2DI(hi);
16049 	    if (free_val)
16050 		clear_tv(&v->di_tv);
16051 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
16052 		vim_free(v);
16053 	}
16054     }
16055     hash_clear(ht);
16056     ht->ht_used = 0;
16057 }
16058 
16059 /*
16060  * Delete a variable from hashtab "ht" at item "hi".
16061  * Clear the variable value and free the dictitem.
16062  */
16063     static void
16064 delete_var(ht, hi)
16065     hashtab_T	*ht;
16066     hashitem_T	*hi;
16067 {
16068     dictitem_T	*di = HI2DI(hi);
16069 
16070     hash_remove(ht, hi);
16071     clear_tv(&di->di_tv);
16072     vim_free(di);
16073 }
16074 
16075 /*
16076  * List the value of one internal variable.
16077  */
16078     static void
16079 list_one_var(v, prefix)
16080     dictitem_T	*v;
16081     char_u	*prefix;
16082 {
16083     char_u	*tofree;
16084     char_u	*s;
16085     char_u	numbuf[NUMBUFLEN];
16086 
16087     s = echo_string(&v->di_tv, &tofree, numbuf);
16088     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16089 						s == NULL ? (char_u *)"" : s);
16090     vim_free(tofree);
16091 }
16092 
16093     static void
16094 list_one_var_a(prefix, name, type, string)
16095     char_u	*prefix;
16096     char_u	*name;
16097     int		type;
16098     char_u	*string;
16099 {
16100     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16101     if (name != NULL)	/* "a:" vars don't have a name stored */
16102 	msg_puts(name);
16103     msg_putchar(' ');
16104     msg_advance(22);
16105     if (type == VAR_NUMBER)
16106 	msg_putchar('#');
16107     else if (type == VAR_FUNC)
16108 	msg_putchar('*');
16109     else if (type == VAR_LIST)
16110     {
16111 	msg_putchar('[');
16112 	if (*string == '[')
16113 	    ++string;
16114     }
16115     else if (type == VAR_DICT)
16116     {
16117 	msg_putchar('{');
16118 	if (*string == '{')
16119 	    ++string;
16120     }
16121     else
16122 	msg_putchar(' ');
16123 
16124     msg_outtrans(string);
16125 
16126     if (type == VAR_FUNC)
16127 	msg_puts((char_u *)"()");
16128 }
16129 
16130 /*
16131  * Set variable "name" to value in "tv".
16132  * If the variable already exists, the value is updated.
16133  * Otherwise the variable is created.
16134  */
16135     static void
16136 set_var(name, tv, copy)
16137     char_u	*name;
16138     typval_T	*tv;
16139     int		copy;	    /* make copy of value in "tv" */
16140 {
16141     dictitem_T	*v;
16142     char_u	*varname;
16143     hashtab_T	*ht;
16144     char_u	*p;
16145 
16146     if (tv->v_type == VAR_FUNC)
16147     {
16148 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16149 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16150 							 ? name[2] : name[0]))
16151 	{
16152 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16153 	    return;
16154 	}
16155 	if (function_exists(name))
16156 	{
16157 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16158 									name);
16159 	    return;
16160 	}
16161     }
16162 
16163     ht = find_var_ht(name, &varname);
16164     if (ht == NULL || *varname == NUL)
16165     {
16166 	EMSG2(_(e_illvar), name);
16167 	return;
16168     }
16169 
16170     v = find_var_in_ht(ht, varname, TRUE);
16171     if (v != NULL)
16172     {
16173 	/* existing variable, need to clear the value */
16174 	if (var_check_ro(v->di_flags, name)
16175 				      || tv_check_lock(v->di_tv.v_lock, name))
16176 	    return;
16177 	if (v->di_tv.v_type != tv->v_type
16178 		&& !((v->di_tv.v_type == VAR_STRING
16179 			|| v->di_tv.v_type == VAR_NUMBER)
16180 		    && (tv->v_type == VAR_STRING
16181 			|| tv->v_type == VAR_NUMBER)))
16182 	{
16183 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16184 	    return;
16185 	}
16186 
16187 	/*
16188 	 * Handle setting internal v: variables separately: we don't change
16189 	 * the type.
16190 	 */
16191 	if (ht == &vimvarht)
16192 	{
16193 	    if (v->di_tv.v_type == VAR_STRING)
16194 	    {
16195 		vim_free(v->di_tv.vval.v_string);
16196 		if (copy || tv->v_type != VAR_STRING)
16197 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16198 		else
16199 		{
16200 		    /* Take over the string to avoid an extra alloc/free. */
16201 		    v->di_tv.vval.v_string = tv->vval.v_string;
16202 		    tv->vval.v_string = NULL;
16203 		}
16204 	    }
16205 	    else if (v->di_tv.v_type != VAR_NUMBER)
16206 		EMSG2(_(e_intern2), "set_var()");
16207 	    else
16208 		v->di_tv.vval.v_number = get_tv_number(tv);
16209 	    return;
16210 	}
16211 
16212 	clear_tv(&v->di_tv);
16213     }
16214     else		    /* add a new variable */
16215     {
16216 	/* Make sure the variable name is valid. */
16217 	for (p = varname; *p != NUL; ++p)
16218 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16219 	    {
16220 		EMSG2(_(e_illvar), varname);
16221 		return;
16222 	    }
16223 
16224 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16225 							  + STRLEN(varname)));
16226 	if (v == NULL)
16227 	    return;
16228 	STRCPY(v->di_key, varname);
16229 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16230 	{
16231 	    vim_free(v);
16232 	    return;
16233 	}
16234 	v->di_flags = 0;
16235     }
16236 
16237     if (copy || tv->v_type == VAR_NUMBER)
16238 	copy_tv(tv, &v->di_tv);
16239     else
16240     {
16241 	v->di_tv = *tv;
16242 	v->di_tv.v_lock = 0;
16243 	init_tv(tv);
16244     }
16245 }
16246 
16247 /*
16248  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16249  * Also give an error message.
16250  */
16251     static int
16252 var_check_ro(flags, name)
16253     int		flags;
16254     char_u	*name;
16255 {
16256     if (flags & DI_FLAGS_RO)
16257     {
16258 	EMSG2(_(e_readonlyvar), name);
16259 	return TRUE;
16260     }
16261     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16262     {
16263 	EMSG2(_(e_readonlysbx), name);
16264 	return TRUE;
16265     }
16266     return FALSE;
16267 }
16268 
16269 /*
16270  * Return TRUE if typeval "tv" is set to be locked (immutable).
16271  * Also give an error message, using "name".
16272  */
16273     static int
16274 tv_check_lock(lock, name)
16275     int		lock;
16276     char_u	*name;
16277 {
16278     if (lock & VAR_LOCKED)
16279     {
16280 	EMSG2(_("E741: Value is locked: %s"),
16281 				name == NULL ? (char_u *)_("Unknown") : name);
16282 	return TRUE;
16283     }
16284     if (lock & VAR_FIXED)
16285     {
16286 	EMSG2(_("E742: Cannot change value of %s"),
16287 				name == NULL ? (char_u *)_("Unknown") : name);
16288 	return TRUE;
16289     }
16290     return FALSE;
16291 }
16292 
16293 /*
16294  * Copy the values from typval_T "from" to typval_T "to".
16295  * When needed allocates string or increases reference count.
16296  * Does not make a copy of a list or dict but copies the reference!
16297  */
16298     static void
16299 copy_tv(from, to)
16300     typval_T *from;
16301     typval_T *to;
16302 {
16303     to->v_type = from->v_type;
16304     to->v_lock = 0;
16305     switch (from->v_type)
16306     {
16307 	case VAR_NUMBER:
16308 	    to->vval.v_number = from->vval.v_number;
16309 	    break;
16310 	case VAR_STRING:
16311 	case VAR_FUNC:
16312 	    if (from->vval.v_string == NULL)
16313 		to->vval.v_string = NULL;
16314 	    else
16315 	    {
16316 		to->vval.v_string = vim_strsave(from->vval.v_string);
16317 		if (from->v_type == VAR_FUNC)
16318 		    func_ref(to->vval.v_string);
16319 	    }
16320 	    break;
16321 	case VAR_LIST:
16322 	    if (from->vval.v_list == NULL)
16323 		to->vval.v_list = NULL;
16324 	    else
16325 	    {
16326 		to->vval.v_list = from->vval.v_list;
16327 		++to->vval.v_list->lv_refcount;
16328 	    }
16329 	    break;
16330 	case VAR_DICT:
16331 	    if (from->vval.v_dict == NULL)
16332 		to->vval.v_dict = NULL;
16333 	    else
16334 	    {
16335 		to->vval.v_dict = from->vval.v_dict;
16336 		++to->vval.v_dict->dv_refcount;
16337 	    }
16338 	    break;
16339 	default:
16340 	    EMSG2(_(e_intern2), "copy_tv()");
16341 	    break;
16342     }
16343 }
16344 
16345 /*
16346  * Make a copy of an item.
16347  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16348  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16349  * reference to an already copied list/dict can be used.
16350  * Returns FAIL or OK.
16351  */
16352     static int
16353 item_copy(from, to, deep, copyID)
16354     typval_T	*from;
16355     typval_T	*to;
16356     int		deep;
16357     int		copyID;
16358 {
16359     static int	recurse = 0;
16360     int		ret = OK;
16361 
16362     if (recurse >= DICT_MAXNEST)
16363     {
16364 	EMSG(_("E698: variable nested too deep for making a copy"));
16365 	return FAIL;
16366     }
16367     ++recurse;
16368 
16369     switch (from->v_type)
16370     {
16371 	case VAR_NUMBER:
16372 	case VAR_STRING:
16373 	case VAR_FUNC:
16374 	    copy_tv(from, to);
16375 	    break;
16376 	case VAR_LIST:
16377 	    to->v_type = VAR_LIST;
16378 	    to->v_lock = 0;
16379 	    if (from->vval.v_list == NULL)
16380 		to->vval.v_list = NULL;
16381 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16382 	    {
16383 		/* use the copy made earlier */
16384 		to->vval.v_list = from->vval.v_list->lv_copylist;
16385 		++to->vval.v_list->lv_refcount;
16386 	    }
16387 	    else
16388 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16389 	    if (to->vval.v_list == NULL)
16390 		ret = FAIL;
16391 	    break;
16392 	case VAR_DICT:
16393 	    to->v_type = VAR_DICT;
16394 	    to->v_lock = 0;
16395 	    if (from->vval.v_dict == NULL)
16396 		to->vval.v_dict = NULL;
16397 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16398 	    {
16399 		/* use the copy made earlier */
16400 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16401 		++to->vval.v_dict->dv_refcount;
16402 	    }
16403 	    else
16404 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16405 	    if (to->vval.v_dict == NULL)
16406 		ret = FAIL;
16407 	    break;
16408 	default:
16409 	    EMSG2(_(e_intern2), "item_copy()");
16410 	    ret = FAIL;
16411     }
16412     --recurse;
16413     return ret;
16414 }
16415 
16416 /*
16417  * ":echo expr1 ..."	print each argument separated with a space, add a
16418  *			newline at the end.
16419  * ":echon expr1 ..."	print each argument plain.
16420  */
16421     void
16422 ex_echo(eap)
16423     exarg_T	*eap;
16424 {
16425     char_u	*arg = eap->arg;
16426     typval_T	rettv;
16427     char_u	*tofree;
16428     char_u	*p;
16429     int		needclr = TRUE;
16430     int		atstart = TRUE;
16431     char_u	numbuf[NUMBUFLEN];
16432 
16433     if (eap->skip)
16434 	++emsg_skip;
16435     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16436     {
16437 	p = arg;
16438 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16439 	{
16440 	    /*
16441 	     * Report the invalid expression unless the expression evaluation
16442 	     * has been cancelled due to an aborting error, an interrupt, or an
16443 	     * exception.
16444 	     */
16445 	    if (!aborting())
16446 		EMSG2(_(e_invexpr2), p);
16447 	    break;
16448 	}
16449 	if (!eap->skip)
16450 	{
16451 	    if (atstart)
16452 	    {
16453 		atstart = FALSE;
16454 		/* Call msg_start() after eval1(), evaluating the expression
16455 		 * may cause a message to appear. */
16456 		if (eap->cmdidx == CMD_echo)
16457 		    msg_start();
16458 	    }
16459 	    else if (eap->cmdidx == CMD_echo)
16460 		msg_puts_attr((char_u *)" ", echo_attr);
16461 	    p = echo_string(&rettv, &tofree, numbuf);
16462 	    if (p != NULL)
16463 		for ( ; *p != NUL && !got_int; ++p)
16464 		{
16465 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16466 		    {
16467 			if (*p != TAB && needclr)
16468 			{
16469 			    /* remove any text still there from the command */
16470 			    msg_clr_eos();
16471 			    needclr = FALSE;
16472 			}
16473 			msg_putchar_attr(*p, echo_attr);
16474 		    }
16475 		    else
16476 		    {
16477 #ifdef FEAT_MBYTE
16478 			if (has_mbyte)
16479 			{
16480 			    int i = (*mb_ptr2len_check)(p);
16481 
16482 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16483 			    p += i - 1;
16484 			}
16485 			else
16486 #endif
16487 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16488 		    }
16489 		}
16490 	    vim_free(tofree);
16491 	}
16492 	clear_tv(&rettv);
16493 	arg = skipwhite(arg);
16494     }
16495     eap->nextcmd = check_nextcmd(arg);
16496 
16497     if (eap->skip)
16498 	--emsg_skip;
16499     else
16500     {
16501 	/* remove text that may still be there from the command */
16502 	if (needclr)
16503 	    msg_clr_eos();
16504 	if (eap->cmdidx == CMD_echo)
16505 	    msg_end();
16506     }
16507 }
16508 
16509 /*
16510  * ":echohl {name}".
16511  */
16512     void
16513 ex_echohl(eap)
16514     exarg_T	*eap;
16515 {
16516     int		id;
16517 
16518     id = syn_name2id(eap->arg);
16519     if (id == 0)
16520 	echo_attr = 0;
16521     else
16522 	echo_attr = syn_id2attr(id);
16523 }
16524 
16525 /*
16526  * ":execute expr1 ..."	execute the result of an expression.
16527  * ":echomsg expr1 ..."	Print a message
16528  * ":echoerr expr1 ..."	Print an error
16529  * Each gets spaces around each argument and a newline at the end for
16530  * echo commands
16531  */
16532     void
16533 ex_execute(eap)
16534     exarg_T	*eap;
16535 {
16536     char_u	*arg = eap->arg;
16537     typval_T	rettv;
16538     int		ret = OK;
16539     char_u	*p;
16540     garray_T	ga;
16541     int		len;
16542     int		save_did_emsg;
16543 
16544     ga_init2(&ga, 1, 80);
16545 
16546     if (eap->skip)
16547 	++emsg_skip;
16548     while (*arg != NUL && *arg != '|' && *arg != '\n')
16549     {
16550 	p = arg;
16551 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16552 	{
16553 	    /*
16554 	     * Report the invalid expression unless the expression evaluation
16555 	     * has been cancelled due to an aborting error, an interrupt, or an
16556 	     * exception.
16557 	     */
16558 	    if (!aborting())
16559 		EMSG2(_(e_invexpr2), p);
16560 	    ret = FAIL;
16561 	    break;
16562 	}
16563 
16564 	if (!eap->skip)
16565 	{
16566 	    p = get_tv_string(&rettv);
16567 	    len = (int)STRLEN(p);
16568 	    if (ga_grow(&ga, len + 2) == FAIL)
16569 	    {
16570 		clear_tv(&rettv);
16571 		ret = FAIL;
16572 		break;
16573 	    }
16574 	    if (ga.ga_len)
16575 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16576 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16577 	    ga.ga_len += len;
16578 	}
16579 
16580 	clear_tv(&rettv);
16581 	arg = skipwhite(arg);
16582     }
16583 
16584     if (ret != FAIL && ga.ga_data != NULL)
16585     {
16586 	if (eap->cmdidx == CMD_echomsg)
16587 	    MSG_ATTR(ga.ga_data, echo_attr);
16588 	else if (eap->cmdidx == CMD_echoerr)
16589 	{
16590 	    /* We don't want to abort following commands, restore did_emsg. */
16591 	    save_did_emsg = did_emsg;
16592 	    EMSG((char_u *)ga.ga_data);
16593 	    if (!force_abort)
16594 		did_emsg = save_did_emsg;
16595 	}
16596 	else if (eap->cmdidx == CMD_execute)
16597 	    do_cmdline((char_u *)ga.ga_data,
16598 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16599     }
16600 
16601     ga_clear(&ga);
16602 
16603     if (eap->skip)
16604 	--emsg_skip;
16605 
16606     eap->nextcmd = check_nextcmd(arg);
16607 }
16608 
16609 /*
16610  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16611  * "arg" points to the "&" or '+' when called, to "option" when returning.
16612  * Returns NULL when no option name found.  Otherwise pointer to the char
16613  * after the option name.
16614  */
16615     static char_u *
16616 find_option_end(arg, opt_flags)
16617     char_u	**arg;
16618     int		*opt_flags;
16619 {
16620     char_u	*p = *arg;
16621 
16622     ++p;
16623     if (*p == 'g' && p[1] == ':')
16624     {
16625 	*opt_flags = OPT_GLOBAL;
16626 	p += 2;
16627     }
16628     else if (*p == 'l' && p[1] == ':')
16629     {
16630 	*opt_flags = OPT_LOCAL;
16631 	p += 2;
16632     }
16633     else
16634 	*opt_flags = 0;
16635 
16636     if (!ASCII_ISALPHA(*p))
16637 	return NULL;
16638     *arg = p;
16639 
16640     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16641 	p += 4;	    /* termcap option */
16642     else
16643 	while (ASCII_ISALPHA(*p))
16644 	    ++p;
16645     return p;
16646 }
16647 
16648 /*
16649  * ":function"
16650  */
16651     void
16652 ex_function(eap)
16653     exarg_T	*eap;
16654 {
16655     char_u	*theline;
16656     int		j;
16657     int		c;
16658     int		saved_did_emsg;
16659     char_u	*name = NULL;
16660     char_u	*p;
16661     char_u	*arg;
16662     garray_T	newargs;
16663     garray_T	newlines;
16664     int		varargs = FALSE;
16665     int		mustend = FALSE;
16666     int		flags = 0;
16667     ufunc_T	*fp;
16668     int		indent;
16669     int		nesting;
16670     char_u	*skip_until = NULL;
16671     dictitem_T	*v;
16672     funcdict_T	fudi;
16673     static int	func_nr = 0;	    /* number for nameless function */
16674     int		paren;
16675     hashtab_T	*ht;
16676     int		todo;
16677     hashitem_T	*hi;
16678 
16679     /*
16680      * ":function" without argument: list functions.
16681      */
16682     if (ends_excmd(*eap->arg))
16683     {
16684 	if (!eap->skip)
16685 	{
16686 	    todo = func_hashtab.ht_used;
16687 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16688 	    {
16689 		if (!HASHITEM_EMPTY(hi))
16690 		{
16691 		    --todo;
16692 		    fp = HI2UF(hi);
16693 		    if (!isdigit(*fp->uf_name))
16694 			list_func_head(fp, FALSE);
16695 		}
16696 	    }
16697 	}
16698 	eap->nextcmd = check_nextcmd(eap->arg);
16699 	return;
16700     }
16701 
16702     /*
16703      * Get the function name.  There are these situations:
16704      * func	    normal function name
16705      *		    "name" == func, "fudi.fd_dict" == NULL
16706      * dict.func    new dictionary entry
16707      *		    "name" == NULL, "fudi.fd_dict" set,
16708      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
16709      * dict.func    existing dict entry with a Funcref
16710      *		    "name" == func, "fudi.fd_dict" set,
16711      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16712      * dict.func    existing dict entry that's not a Funcref
16713      *		    "name" == NULL, "fudi.fd_dict" set,
16714      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16715      */
16716     p = eap->arg;
16717     name = trans_function_name(&p, eap->skip, 0, &fudi);
16718     paren = (vim_strchr(p, '(') != NULL);
16719     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
16720     {
16721 	/*
16722 	 * Return on an invalid expression in braces, unless the expression
16723 	 * evaluation has been cancelled due to an aborting error, an
16724 	 * interrupt, or an exception.
16725 	 */
16726 	if (!aborting())
16727 	{
16728 	    if (!eap->skip && fudi.fd_newkey != NULL)
16729 		EMSG2(_(e_dictkey), fudi.fd_newkey);
16730 	    vim_free(fudi.fd_newkey);
16731 	    return;
16732 	}
16733 	else
16734 	    eap->skip = TRUE;
16735     }
16736     /* An error in a function call during evaluation of an expression in magic
16737      * braces should not cause the function not to be defined. */
16738     saved_did_emsg = did_emsg;
16739     did_emsg = FALSE;
16740 
16741     /*
16742      * ":function func" with only function name: list function.
16743      */
16744     if (!paren)
16745     {
16746 	if (!ends_excmd(*skipwhite(p)))
16747 	{
16748 	    EMSG(_(e_trailing));
16749 	    goto ret_free;
16750 	}
16751 	eap->nextcmd = check_nextcmd(p);
16752 	if (eap->nextcmd != NULL)
16753 	    *p = NUL;
16754 	if (!eap->skip && !got_int)
16755 	{
16756 	    fp = find_func(name);
16757 	    if (fp != NULL)
16758 	    {
16759 		list_func_head(fp, TRUE);
16760 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
16761 		{
16762 		    msg_putchar('\n');
16763 		    msg_outnum((long)(j + 1));
16764 		    if (j < 9)
16765 			msg_putchar(' ');
16766 		    if (j < 99)
16767 			msg_putchar(' ');
16768 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
16769 		    out_flush();	/* show a line at a time */
16770 		    ui_breakcheck();
16771 		}
16772 		if (!got_int)
16773 		{
16774 		    msg_putchar('\n');
16775 		    msg_puts((char_u *)"   endfunction");
16776 		}
16777 	    }
16778 	    else
16779 		emsg_funcname("E123: Undefined function: %s", name);
16780 	}
16781 	goto ret_free;
16782     }
16783 
16784     /*
16785      * ":function name(arg1, arg2)" Define function.
16786      */
16787     p = skipwhite(p);
16788     if (*p != '(')
16789     {
16790 	if (!eap->skip)
16791 	{
16792 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
16793 	    goto ret_free;
16794 	}
16795 	/* attempt to continue by skipping some text */
16796 	if (vim_strchr(p, '(') != NULL)
16797 	    p = vim_strchr(p, '(');
16798     }
16799     p = skipwhite(p + 1);
16800 
16801     ga_init2(&newargs, (int)sizeof(char_u *), 3);
16802     ga_init2(&newlines, (int)sizeof(char_u *), 3);
16803 
16804     if (!eap->skip)
16805     {
16806 	/* Check the name of the function. */
16807 	if (name != NULL)
16808 	    arg = name;
16809 	else
16810 	    arg = fudi.fd_newkey;
16811 	if (arg != NULL)
16812 	{
16813 	    if (*arg == K_SPECIAL)
16814 		j = 3;
16815 	    else
16816 		j = 0;
16817 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
16818 						      : eval_isnamec(arg[j])))
16819 		++j;
16820 	    if (arg[j] != NUL)
16821 		emsg_funcname(_(e_invarg2), arg);
16822 	}
16823     }
16824 
16825     /*
16826      * Isolate the arguments: "arg1, arg2, ...)"
16827      */
16828     while (*p != ')')
16829     {
16830 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
16831 	{
16832 	    varargs = TRUE;
16833 	    p += 3;
16834 	    mustend = TRUE;
16835 	}
16836 	else
16837 	{
16838 	    arg = p;
16839 	    while (ASCII_ISALNUM(*p) || *p == '_')
16840 		++p;
16841 	    if (arg == p || isdigit(*arg)
16842 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
16843 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
16844 	    {
16845 		if (!eap->skip)
16846 		    EMSG2(_("E125: Illegal argument: %s"), arg);
16847 		break;
16848 	    }
16849 	    if (ga_grow(&newargs, 1) == FAIL)
16850 		goto erret;
16851 	    c = *p;
16852 	    *p = NUL;
16853 	    arg = vim_strsave(arg);
16854 	    if (arg == NULL)
16855 		goto erret;
16856 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
16857 	    *p = c;
16858 	    newargs.ga_len++;
16859 	    if (*p == ',')
16860 		++p;
16861 	    else
16862 		mustend = TRUE;
16863 	}
16864 	p = skipwhite(p);
16865 	if (mustend && *p != ')')
16866 	{
16867 	    if (!eap->skip)
16868 		EMSG2(_(e_invarg2), eap->arg);
16869 	    break;
16870 	}
16871     }
16872     ++p;	/* skip the ')' */
16873 
16874     /* find extra arguments "range", "dict" and "abort" */
16875     for (;;)
16876     {
16877 	p = skipwhite(p);
16878 	if (STRNCMP(p, "range", 5) == 0)
16879 	{
16880 	    flags |= FC_RANGE;
16881 	    p += 5;
16882 	}
16883 	else if (STRNCMP(p, "dict", 4) == 0)
16884 	{
16885 	    flags |= FC_DICT;
16886 	    p += 4;
16887 	}
16888 	else if (STRNCMP(p, "abort", 5) == 0)
16889 	{
16890 	    flags |= FC_ABORT;
16891 	    p += 5;
16892 	}
16893 	else
16894 	    break;
16895     }
16896 
16897     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
16898 	EMSG(_(e_trailing));
16899 
16900     /*
16901      * Read the body of the function, until ":endfunction" is found.
16902      */
16903     if (KeyTyped)
16904     {
16905 	/* Check if the function already exists, don't let the user type the
16906 	 * whole function before telling him it doesn't work!  For a script we
16907 	 * need to skip the body to be able to find what follows. */
16908 	if (!eap->skip && !eap->forceit)
16909 	{
16910 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
16911 		EMSG(_(e_funcdict));
16912 	    else if (name != NULL && find_func(name) != NULL)
16913 		emsg_funcname(e_funcexts, name);
16914 	}
16915 
16916 	if (!eap->skip && did_emsg)
16917 	    goto erret;
16918 
16919 	msg_putchar('\n');	    /* don't overwrite the function name */
16920 	cmdline_row = msg_row;
16921     }
16922 
16923     indent = 2;
16924     nesting = 0;
16925     for (;;)
16926     {
16927 	msg_scroll = TRUE;
16928 	need_wait_return = FALSE;
16929 	if (eap->getline == NULL)
16930 	    theline = getcmdline(':', 0L, indent);
16931 	else
16932 	    theline = eap->getline(':', eap->cookie, indent);
16933 	if (KeyTyped)
16934 	    lines_left = Rows - 1;
16935 	if (theline == NULL)
16936 	{
16937 	    EMSG(_("E126: Missing :endfunction"));
16938 	    goto erret;
16939 	}
16940 
16941 	if (skip_until != NULL)
16942 	{
16943 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
16944 	     * don't check for ":endfunc". */
16945 	    if (STRCMP(theline, skip_until) == 0)
16946 	    {
16947 		vim_free(skip_until);
16948 		skip_until = NULL;
16949 	    }
16950 	}
16951 	else
16952 	{
16953 	    /* skip ':' and blanks*/
16954 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
16955 		;
16956 
16957 	    /* Check for "endfunction". */
16958 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
16959 	    {
16960 		vim_free(theline);
16961 		break;
16962 	    }
16963 
16964 	    /* Increase indent inside "if", "while", "for" and "try", decrease
16965 	     * at "end". */
16966 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
16967 		indent -= 2;
16968 	    else if (STRNCMP(p, "if", 2) == 0
16969 		    || STRNCMP(p, "wh", 2) == 0
16970 		    || STRNCMP(p, "for", 3) == 0
16971 		    || STRNCMP(p, "try", 3) == 0)
16972 		indent += 2;
16973 
16974 	    /* Check for defining a function inside this function. */
16975 	    if (checkforcmd(&p, "function", 2))
16976 	    {
16977 		if (*p == '!')
16978 		    p = skipwhite(p + 1);
16979 		p += eval_fname_script(p);
16980 		if (ASCII_ISALPHA(*p))
16981 		{
16982 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
16983 		    if (*skipwhite(p) == '(')
16984 		    {
16985 			++nesting;
16986 			indent += 2;
16987 		    }
16988 		}
16989 	    }
16990 
16991 	    /* Check for ":append" or ":insert". */
16992 	    p = skip_range(p, NULL);
16993 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
16994 		    || (p[0] == 'i'
16995 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
16996 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
16997 		skip_until = vim_strsave((char_u *)".");
16998 
16999 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
17000 	    arg = skipwhite(skiptowhite(p));
17001 	    if (arg[0] == '<' && arg[1] =='<'
17002 		    && ((p[0] == 'p' && p[1] == 'y'
17003 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
17004 			|| (p[0] == 'p' && p[1] == 'e'
17005 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
17006 			|| (p[0] == 't' && p[1] == 'c'
17007 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
17008 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
17009 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
17010 			|| (p[0] == 'm' && p[1] == 'z'
17011 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
17012 			))
17013 	    {
17014 		/* ":python <<" continues until a dot, like ":append" */
17015 		p = skipwhite(arg + 2);
17016 		if (*p == NUL)
17017 		    skip_until = vim_strsave((char_u *)".");
17018 		else
17019 		    skip_until = vim_strsave(p);
17020 	    }
17021 	}
17022 
17023 	/* Add the line to the function. */
17024 	if (ga_grow(&newlines, 1) == FAIL)
17025 	{
17026 	    vim_free(theline);
17027 	    goto erret;
17028 	}
17029 
17030 	/* Copy the line to newly allocated memory.  get_one_sourceline()
17031 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
17032 	 * is an extra alloc/free. */
17033 	p = vim_strsave(theline);
17034 	if (p != NULL)
17035 	{
17036 	    vim_free(theline);
17037 	    theline = p;
17038 	}
17039 
17040 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
17041 	newlines.ga_len++;
17042     }
17043 
17044     /* Don't define the function when skipping commands or when an error was
17045      * detected. */
17046     if (eap->skip || did_emsg)
17047 	goto erret;
17048 
17049     /*
17050      * If there are no errors, add the function
17051      */
17052     if (fudi.fd_dict == NULL)
17053     {
17054 	v = find_var(name, &ht);
17055 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
17056 	{
17057 	    emsg_funcname("E707: Function name conflicts with variable: %s",
17058 									name);
17059 	    goto erret;
17060 	}
17061 
17062 	fp = find_func(name);
17063 	if (fp != NULL)
17064 	{
17065 	    if (!eap->forceit)
17066 	    {
17067 		emsg_funcname(e_funcexts, name);
17068 		goto erret;
17069 	    }
17070 	    if (fp->uf_calls > 0)
17071 	    {
17072 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
17073 									name);
17074 		goto erret;
17075 	    }
17076 	    /* redefine existing function */
17077 	    ga_clear_strings(&(fp->uf_args));
17078 	    ga_clear_strings(&(fp->uf_lines));
17079 	    vim_free(name);
17080 	    name = NULL;
17081 	}
17082     }
17083     else
17084     {
17085 	char	numbuf[20];
17086 
17087 	fp = NULL;
17088 	if (fudi.fd_newkey == NULL && !eap->forceit)
17089 	{
17090 	    EMSG(_(e_funcdict));
17091 	    goto erret;
17092 	}
17093 	if (fudi.fd_di == NULL)
17094 	{
17095 	    /* Can't add a function to a locked dictionary */
17096 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17097 		goto erret;
17098 	}
17099 	    /* Can't change an existing function if it is locked */
17100 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17101 	    goto erret;
17102 
17103 	/* Give the function a sequential number.  Can only be used with a
17104 	 * Funcref! */
17105 	vim_free(name);
17106 	sprintf(numbuf, "%d", ++func_nr);
17107 	name = vim_strsave((char_u *)numbuf);
17108 	if (name == NULL)
17109 	    goto erret;
17110     }
17111 
17112     if (fp == NULL)
17113     {
17114 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17115 	{
17116 	    int	    slen, plen;
17117 	    char_u  *scriptname;
17118 
17119 	    /* Check that the autoload name matches the script name. */
17120 	    j = FAIL;
17121 	    if (sourcing_name != NULL)
17122 	    {
17123 		scriptname = autoload_name(name);
17124 		if (scriptname != NULL)
17125 		{
17126 		    p = vim_strchr(scriptname, '/');
17127 		    plen = STRLEN(p);
17128 		    slen = STRLEN(sourcing_name);
17129 		    if (slen > plen && fnamecmp(p,
17130 					    sourcing_name + slen - plen) == 0)
17131 			j = OK;
17132 		    vim_free(scriptname);
17133 		}
17134 	    }
17135 	    if (j == FAIL)
17136 	    {
17137 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17138 		goto erret;
17139 	    }
17140 	}
17141 
17142 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17143 	if (fp == NULL)
17144 	    goto erret;
17145 
17146 	if (fudi.fd_dict != NULL)
17147 	{
17148 	    if (fudi.fd_di == NULL)
17149 	    {
17150 		/* add new dict entry */
17151 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17152 		if (fudi.fd_di == NULL)
17153 		{
17154 		    vim_free(fp);
17155 		    goto erret;
17156 		}
17157 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17158 		{
17159 		    vim_free(fudi.fd_di);
17160 		    goto erret;
17161 		}
17162 	    }
17163 	    else
17164 		/* overwrite existing dict entry */
17165 		clear_tv(&fudi.fd_di->di_tv);
17166 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17167 	    fudi.fd_di->di_tv.v_lock = 0;
17168 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17169 	    fp->uf_refcount = 1;
17170 	}
17171 
17172 	/* insert the new function in the function list */
17173 	STRCPY(fp->uf_name, name);
17174 	hash_add(&func_hashtab, UF2HIKEY(fp));
17175     }
17176     fp->uf_args = newargs;
17177     fp->uf_lines = newlines;
17178 #ifdef FEAT_PROFILE
17179     fp->uf_tml_count = NULL;
17180     fp->uf_tml_total = NULL;
17181     fp->uf_tml_self = NULL;
17182     fp->uf_profiling = FALSE;
17183     if (prof_def_func())
17184 	func_do_profile(fp);
17185 #endif
17186     fp->uf_varargs = varargs;
17187     fp->uf_flags = flags;
17188     fp->uf_calls = 0;
17189     fp->uf_script_ID = current_SID;
17190     goto ret_free;
17191 
17192 erret:
17193     ga_clear_strings(&newargs);
17194     ga_clear_strings(&newlines);
17195 ret_free:
17196     vim_free(skip_until);
17197     vim_free(fudi.fd_newkey);
17198     vim_free(name);
17199     did_emsg |= saved_did_emsg;
17200 }
17201 
17202 /*
17203  * Get a function name, translating "<SID>" and "<SNR>".
17204  * Also handles a Funcref in a List or Dictionary.
17205  * Returns the function name in allocated memory, or NULL for failure.
17206  * flags:
17207  * TFN_INT:   internal function name OK
17208  * TFN_QUIET: be quiet
17209  * Advances "pp" to just after the function name (if no error).
17210  */
17211     static char_u *
17212 trans_function_name(pp, skip, flags, fdp)
17213     char_u	**pp;
17214     int		skip;		/* only find the end, don't evaluate */
17215     int		flags;
17216     funcdict_T	*fdp;		/* return: info about dictionary used */
17217 {
17218     char_u	*name = NULL;
17219     char_u	*start;
17220     char_u	*end;
17221     int		lead;
17222     char_u	sid_buf[20];
17223     int		len;
17224     lval_T	lv;
17225 
17226     if (fdp != NULL)
17227 	vim_memset(fdp, 0, sizeof(funcdict_T));
17228     start = *pp;
17229 
17230     /* Check for hard coded <SNR>: already translated function ID (from a user
17231      * command). */
17232     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17233 						   && (*pp)[2] == (int)KE_SNR)
17234     {
17235 	*pp += 3;
17236 	len = get_id_len(pp) + 3;
17237 	return vim_strnsave(start, len);
17238     }
17239 
17240     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17241      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17242     lead = eval_fname_script(start);
17243     if (lead > 2)
17244 	start += lead;
17245 
17246     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17247 					      lead > 2 ? 0 : FNE_CHECK_START);
17248     if (end == start)
17249     {
17250 	if (!skip)
17251 	    EMSG(_("E129: Function name required"));
17252 	goto theend;
17253     }
17254     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17255     {
17256 	/*
17257 	 * Report an invalid expression in braces, unless the expression
17258 	 * evaluation has been cancelled due to an aborting error, an
17259 	 * interrupt, or an exception.
17260 	 */
17261 	if (!aborting())
17262 	{
17263 	    if (end != NULL)
17264 		EMSG2(_(e_invarg2), start);
17265 	}
17266 	else
17267 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17268 	goto theend;
17269     }
17270 
17271     if (lv.ll_tv != NULL)
17272     {
17273 	if (fdp != NULL)
17274 	{
17275 	    fdp->fd_dict = lv.ll_dict;
17276 	    fdp->fd_newkey = lv.ll_newkey;
17277 	    lv.ll_newkey = NULL;
17278 	    fdp->fd_di = lv.ll_di;
17279 	}
17280 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17281 	{
17282 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17283 	    *pp = end;
17284 	}
17285 	else
17286 	{
17287 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17288 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17289 		EMSG(_(e_funcref));
17290 	    else
17291 		*pp = end;
17292 	    name = NULL;
17293 	}
17294 	goto theend;
17295     }
17296 
17297     if (lv.ll_name == NULL)
17298     {
17299 	/* Error found, but continue after the function name. */
17300 	*pp = end;
17301 	goto theend;
17302     }
17303 
17304     if (lv.ll_exp_name != NULL)
17305 	len = STRLEN(lv.ll_exp_name);
17306     else
17307     {
17308 	if (lead == 2)	/* skip over "s:" */
17309 	    lv.ll_name += 2;
17310 	len = (int)(end - lv.ll_name);
17311     }
17312 
17313     /*
17314      * Copy the function name to allocated memory.
17315      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17316      * Accept <SNR>123_name() outside a script.
17317      */
17318     if (skip)
17319 	lead = 0;	/* do nothing */
17320     else if (lead > 0)
17321     {
17322 	lead = 3;
17323 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17324 	{
17325 	    if (current_SID <= 0)
17326 	    {
17327 		EMSG(_(e_usingsid));
17328 		goto theend;
17329 	    }
17330 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17331 	    lead += (int)STRLEN(sid_buf);
17332 	}
17333     }
17334     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17335     {
17336 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17337 	goto theend;
17338     }
17339     name = alloc((unsigned)(len + lead + 1));
17340     if (name != NULL)
17341     {
17342 	if (lead > 0)
17343 	{
17344 	    name[0] = K_SPECIAL;
17345 	    name[1] = KS_EXTRA;
17346 	    name[2] = (int)KE_SNR;
17347 	    if (lead > 3)	/* If it's "<SID>" */
17348 		STRCPY(name + 3, sid_buf);
17349 	}
17350 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17351 	name[len + lead] = NUL;
17352     }
17353     *pp = end;
17354 
17355 theend:
17356     clear_lval(&lv);
17357     return name;
17358 }
17359 
17360 /*
17361  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17362  * Return 2 if "p" starts with "s:".
17363  * Return 0 otherwise.
17364  */
17365     static int
17366 eval_fname_script(p)
17367     char_u	*p;
17368 {
17369     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17370 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17371 	return 5;
17372     if (p[0] == 's' && p[1] == ':')
17373 	return 2;
17374     return 0;
17375 }
17376 
17377 /*
17378  * Return TRUE if "p" starts with "<SID>" or "s:".
17379  * Only works if eval_fname_script() returned non-zero for "p"!
17380  */
17381     static int
17382 eval_fname_sid(p)
17383     char_u	*p;
17384 {
17385     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17386 }
17387 
17388 /*
17389  * List the head of the function: "name(arg1, arg2)".
17390  */
17391     static void
17392 list_func_head(fp, indent)
17393     ufunc_T	*fp;
17394     int		indent;
17395 {
17396     int		j;
17397 
17398     msg_start();
17399     if (indent)
17400 	MSG_PUTS("   ");
17401     MSG_PUTS("function ");
17402     if (fp->uf_name[0] == K_SPECIAL)
17403     {
17404 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17405 	msg_puts(fp->uf_name + 3);
17406     }
17407     else
17408 	msg_puts(fp->uf_name);
17409     msg_putchar('(');
17410     for (j = 0; j < fp->uf_args.ga_len; ++j)
17411     {
17412 	if (j)
17413 	    MSG_PUTS(", ");
17414 	msg_puts(FUNCARG(fp, j));
17415     }
17416     if (fp->uf_varargs)
17417     {
17418 	if (j)
17419 	    MSG_PUTS(", ");
17420 	MSG_PUTS("...");
17421     }
17422     msg_putchar(')');
17423 }
17424 
17425 /*
17426  * Find a function by name, return pointer to it in ufuncs.
17427  * Return NULL for unknown function.
17428  */
17429     static ufunc_T *
17430 find_func(name)
17431     char_u	*name;
17432 {
17433     hashitem_T	*hi;
17434 
17435     hi = hash_find(&func_hashtab, name);
17436     if (!HASHITEM_EMPTY(hi))
17437 	return HI2UF(hi);
17438     return NULL;
17439 }
17440 
17441 #if defined(EXITFREE) || defined(PROTO)
17442     void
17443 free_all_functions()
17444 {
17445     hashitem_T	*hi;
17446 
17447     /* Need to start all over every time, because func_free() may change the
17448      * hash table. */
17449     while (func_hashtab.ht_used > 0)
17450 	for (hi = func_hashtab.ht_array; ; ++hi)
17451 	    if (!HASHITEM_EMPTY(hi))
17452 	    {
17453 		func_free(HI2UF(hi));
17454 		break;
17455 	    }
17456 }
17457 #endif
17458 
17459 /*
17460  * Return TRUE if a function "name" exists.
17461  */
17462     static int
17463 function_exists(name)
17464     char_u *name;
17465 {
17466     char_u  *p = name;
17467     int	    n = FALSE;
17468 
17469     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17470     if (p != NULL)
17471     {
17472 	if (builtin_function(p))
17473 	    n = (find_internal_func(p) >= 0);
17474 	else
17475 	    n = (find_func(p) != NULL);
17476 	vim_free(p);
17477     }
17478     return n;
17479 }
17480 
17481 /*
17482  * Return TRUE if "name" looks like a builtin function name: starts with a
17483  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17484  */
17485     static int
17486 builtin_function(name)
17487     char_u *name;
17488 {
17489     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17490 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17491 }
17492 
17493 #if defined(FEAT_PROFILE) || defined(PROTO)
17494 /*
17495  * Start profiling function "fp".
17496  */
17497     static void
17498 func_do_profile(fp)
17499     ufunc_T	*fp;
17500 {
17501     fp->uf_tm_count = 0;
17502     profile_zero(&fp->uf_tm_self);
17503     profile_zero(&fp->uf_tm_total);
17504     if (fp->uf_tml_count == NULL)
17505 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17506 					 (sizeof(int) * fp->uf_lines.ga_len));
17507     if (fp->uf_tml_total == NULL)
17508 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17509 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17510     if (fp->uf_tml_self == NULL)
17511 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17512 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17513     fp->uf_tml_idx = -1;
17514     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17515 						   || fp->uf_tml_self == NULL)
17516 	return;	    /* out of memory */
17517 
17518     fp->uf_profiling = TRUE;
17519 }
17520 
17521 /*
17522  * Dump the profiling results for all functions in file "fd".
17523  */
17524     void
17525 func_dump_profile(fd)
17526     FILE    *fd;
17527 {
17528     hashitem_T	*hi;
17529     int		todo;
17530     ufunc_T	*fp;
17531     int		i;
17532     ufunc_T	**sorttab;
17533     int		st_len = 0;
17534 
17535     todo = func_hashtab.ht_used;
17536     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17537 
17538     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17539     {
17540 	if (!HASHITEM_EMPTY(hi))
17541 	{
17542 	    --todo;
17543 	    fp = HI2UF(hi);
17544 	    if (fp->uf_profiling)
17545 	    {
17546 		if (sorttab != NULL)
17547 		    sorttab[st_len++] = fp;
17548 
17549 		if (fp->uf_name[0] == K_SPECIAL)
17550 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17551 		else
17552 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17553 		if (fp->uf_tm_count == 1)
17554 		    fprintf(fd, "Called 1 time\n");
17555 		else
17556 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17557 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17558 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17559 		fprintf(fd, "\n");
17560 		fprintf(fd, "count  total (s)   self (s)\n");
17561 
17562 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17563 		{
17564 		    prof_func_line(fd, fp->uf_tml_count[i],
17565 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17566 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17567 		}
17568 		fprintf(fd, "\n");
17569 	    }
17570 	}
17571     }
17572 
17573     if (sorttab != NULL && st_len > 0)
17574     {
17575 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17576 							      prof_total_cmp);
17577 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17578 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17579 							      prof_self_cmp);
17580 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17581     }
17582 }
17583 
17584     static void
17585 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17586     FILE	*fd;
17587     ufunc_T	**sorttab;
17588     int		st_len;
17589     char	*title;
17590     int		prefer_self;	/* when equal print only self time */
17591 {
17592     int		i;
17593     ufunc_T	*fp;
17594 
17595     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17596     fprintf(fd, "count  total (s)   self (s)  function\n");
17597     for (i = 0; i < 20 && i < st_len; ++i)
17598     {
17599 	fp = sorttab[i];
17600 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17601 								 prefer_self);
17602 	if (fp->uf_name[0] == K_SPECIAL)
17603 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17604 	else
17605 	    fprintf(fd, " %s()\n", fp->uf_name);
17606     }
17607     fprintf(fd, "\n");
17608 }
17609 
17610 /*
17611  * Print the count and times for one function or function line.
17612  */
17613     static void
17614 prof_func_line(fd, count, total, self, prefer_self)
17615     FILE	*fd;
17616     int		count;
17617     proftime_T	*total;
17618     proftime_T	*self;
17619     int		prefer_self;	/* when equal print only self time */
17620 {
17621     if (count > 0)
17622     {
17623 	fprintf(fd, "%5d ", count);
17624 	if (prefer_self && profile_equal(total, self))
17625 	    fprintf(fd, "           ");
17626 	else
17627 	    fprintf(fd, "%s ", profile_msg(total));
17628 	if (!prefer_self && profile_equal(total, self))
17629 	    fprintf(fd, "           ");
17630 	else
17631 	    fprintf(fd, "%s ", profile_msg(self));
17632     }
17633     else
17634 	fprintf(fd, "                            ");
17635 }
17636 
17637 /*
17638  * Compare function for total time sorting.
17639  */
17640     static int
17641 #ifdef __BORLANDC__
17642 _RTLENTRYF
17643 #endif
17644 prof_total_cmp(s1, s2)
17645     const void	*s1;
17646     const void	*s2;
17647 {
17648     ufunc_T	*p1, *p2;
17649 
17650     p1 = *(ufunc_T **)s1;
17651     p2 = *(ufunc_T **)s2;
17652     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17653 }
17654 
17655 /*
17656  * Compare function for self time sorting.
17657  */
17658     static int
17659 #ifdef __BORLANDC__
17660 _RTLENTRYF
17661 #endif
17662 prof_self_cmp(s1, s2)
17663     const void	*s1;
17664     const void	*s2;
17665 {
17666     ufunc_T	*p1, *p2;
17667 
17668     p1 = *(ufunc_T **)s1;
17669     p2 = *(ufunc_T **)s2;
17670     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17671 }
17672 
17673 #endif
17674 
17675 /* The names of packages that once were loaded is remembered. */
17676 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17677 
17678 /*
17679  * If "name" has a package name try autoloading the script for it.
17680  * Return TRUE if a package was loaded.
17681  */
17682     static int
17683 script_autoload(name, reload)
17684     char_u	*name;
17685     int		reload;	    /* load script again when already loaded */
17686 {
17687     char_u	*p;
17688     char_u	*scriptname, *tofree;
17689     int		ret = FALSE;
17690     int		i;
17691 
17692     /* If there is no '#' after name[0] there is no package name. */
17693     p = vim_strchr(name, AUTOLOAD_CHAR);
17694     if (p == NULL || p == name)
17695 	return FALSE;
17696 
17697     tofree = scriptname = autoload_name(name);
17698 
17699     /* Find the name in the list of previously loaded package names.  Skip
17700      * "autoload/", it's always the same. */
17701     for (i = 0; i < ga_loaded.ga_len; ++i)
17702 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
17703 	    break;
17704     if (!reload && i < ga_loaded.ga_len)
17705 	ret = FALSE;	    /* was loaded already */
17706     else
17707     {
17708 	/* Remember the name if it wasn't loaded already. */
17709 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
17710 	{
17711 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
17712 	    tofree = NULL;
17713 	}
17714 
17715 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
17716 	if (cmd_runtime(scriptname, FALSE) == OK)
17717 	    ret = TRUE;
17718     }
17719 
17720     vim_free(tofree);
17721     return ret;
17722 }
17723 
17724 /*
17725  * Return the autoload script name for a function or variable name.
17726  * Returns NULL when out of memory.
17727  */
17728     static char_u *
17729 autoload_name(name)
17730     char_u	*name;
17731 {
17732     char_u	*p;
17733     char_u	*scriptname;
17734 
17735     /* Get the script file name: replace '#' with '/', append ".vim". */
17736     scriptname = alloc((unsigned)(STRLEN(name) + 14));
17737     if (scriptname == NULL)
17738 	return FALSE;
17739     STRCPY(scriptname, "autoload/");
17740     STRCAT(scriptname, name);
17741     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
17742     STRCAT(scriptname, ".vim");
17743     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
17744 	*p = '/';
17745     return scriptname;
17746 }
17747 
17748 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
17749 
17750 /*
17751  * Function given to ExpandGeneric() to obtain the list of user defined
17752  * function names.
17753  */
17754     char_u *
17755 get_user_func_name(xp, idx)
17756     expand_T	*xp;
17757     int		idx;
17758 {
17759     static long_u	done;
17760     static hashitem_T	*hi;
17761     ufunc_T		*fp;
17762 
17763     if (idx == 0)
17764     {
17765 	done = 0;
17766 	hi = func_hashtab.ht_array;
17767     }
17768     if (done < func_hashtab.ht_used)
17769     {
17770 	if (done++ > 0)
17771 	    ++hi;
17772 	while (HASHITEM_EMPTY(hi))
17773 	    ++hi;
17774 	fp = HI2UF(hi);
17775 
17776 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
17777 	    return fp->uf_name;	/* prevents overflow */
17778 
17779 	cat_func_name(IObuff, fp);
17780 	if (xp->xp_context != EXPAND_USER_FUNC)
17781 	{
17782 	    STRCAT(IObuff, "(");
17783 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
17784 		STRCAT(IObuff, ")");
17785 	}
17786 	return IObuff;
17787     }
17788     return NULL;
17789 }
17790 
17791 #endif /* FEAT_CMDL_COMPL */
17792 
17793 /*
17794  * Copy the function name of "fp" to buffer "buf".
17795  * "buf" must be able to hold the function name plus three bytes.
17796  * Takes care of script-local function names.
17797  */
17798     static void
17799 cat_func_name(buf, fp)
17800     char_u	*buf;
17801     ufunc_T	*fp;
17802 {
17803     if (fp->uf_name[0] == K_SPECIAL)
17804     {
17805 	STRCPY(buf, "<SNR>");
17806 	STRCAT(buf, fp->uf_name + 3);
17807     }
17808     else
17809 	STRCPY(buf, fp->uf_name);
17810 }
17811 
17812 /*
17813  * ":delfunction {name}"
17814  */
17815     void
17816 ex_delfunction(eap)
17817     exarg_T	*eap;
17818 {
17819     ufunc_T	*fp = NULL;
17820     char_u	*p;
17821     char_u	*name;
17822     funcdict_T	fudi;
17823 
17824     p = eap->arg;
17825     name = trans_function_name(&p, eap->skip, 0, &fudi);
17826     vim_free(fudi.fd_newkey);
17827     if (name == NULL)
17828     {
17829 	if (fudi.fd_dict != NULL && !eap->skip)
17830 	    EMSG(_(e_funcref));
17831 	return;
17832     }
17833     if (!ends_excmd(*skipwhite(p)))
17834     {
17835 	vim_free(name);
17836 	EMSG(_(e_trailing));
17837 	return;
17838     }
17839     eap->nextcmd = check_nextcmd(p);
17840     if (eap->nextcmd != NULL)
17841 	*p = NUL;
17842 
17843     if (!eap->skip)
17844 	fp = find_func(name);
17845     vim_free(name);
17846 
17847     if (!eap->skip)
17848     {
17849 	if (fp == NULL)
17850 	{
17851 	    EMSG2(_(e_nofunc), eap->arg);
17852 	    return;
17853 	}
17854 	if (fp->uf_calls > 0)
17855 	{
17856 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
17857 	    return;
17858 	}
17859 
17860 	if (fudi.fd_dict != NULL)
17861 	{
17862 	    /* Delete the dict item that refers to the function, it will
17863 	     * invoke func_unref() and possibly delete the function. */
17864 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
17865 	}
17866 	else
17867 	    func_free(fp);
17868     }
17869 }
17870 
17871 /*
17872  * Free a function and remove it from the list of functions.
17873  */
17874     static void
17875 func_free(fp)
17876     ufunc_T *fp;
17877 {
17878     hashitem_T	*hi;
17879 
17880     /* clear this function */
17881     ga_clear_strings(&(fp->uf_args));
17882     ga_clear_strings(&(fp->uf_lines));
17883 #ifdef FEAT_PROFILE
17884     vim_free(fp->uf_tml_count);
17885     vim_free(fp->uf_tml_total);
17886     vim_free(fp->uf_tml_self);
17887 #endif
17888 
17889     /* remove the function from the function hashtable */
17890     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
17891     if (HASHITEM_EMPTY(hi))
17892 	EMSG2(_(e_intern2), "func_free()");
17893     else
17894 	hash_remove(&func_hashtab, hi);
17895 
17896     vim_free(fp);
17897 }
17898 
17899 /*
17900  * Unreference a Function: decrement the reference count and free it when it
17901  * becomes zero.  Only for numbered functions.
17902  */
17903     static void
17904 func_unref(name)
17905     char_u	*name;
17906 {
17907     ufunc_T *fp;
17908 
17909     if (name != NULL && isdigit(*name))
17910     {
17911 	fp = find_func(name);
17912 	if (fp == NULL)
17913 	    EMSG2(_(e_intern2), "func_unref()");
17914 	else if (--fp->uf_refcount <= 0)
17915 	{
17916 	    /* Only delete it when it's not being used.  Otherwise it's done
17917 	     * when "uf_calls" becomes zero. */
17918 	    if (fp->uf_calls == 0)
17919 		func_free(fp);
17920 	}
17921     }
17922 }
17923 
17924 /*
17925  * Count a reference to a Function.
17926  */
17927     static void
17928 func_ref(name)
17929     char_u	*name;
17930 {
17931     ufunc_T *fp;
17932 
17933     if (name != NULL && isdigit(*name))
17934     {
17935 	fp = find_func(name);
17936 	if (fp == NULL)
17937 	    EMSG2(_(e_intern2), "func_ref()");
17938 	else
17939 	    ++fp->uf_refcount;
17940     }
17941 }
17942 
17943 /*
17944  * Call a user function.
17945  */
17946     static void
17947 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
17948     ufunc_T	*fp;		/* pointer to function */
17949     int		argcount;	/* nr of args */
17950     typval_T	*argvars;	/* arguments */
17951     typval_T	*rettv;		/* return value */
17952     linenr_T	firstline;	/* first line of range */
17953     linenr_T	lastline;	/* last line of range */
17954     dict_T	*selfdict;	/* Dictionary for "self" */
17955 {
17956     char_u	*save_sourcing_name;
17957     linenr_T	save_sourcing_lnum;
17958     scid_T	save_current_SID;
17959     funccall_T	fc;
17960     int		save_did_emsg;
17961     static int	depth = 0;
17962     dictitem_T	*v;
17963     int		fixvar_idx = 0;	/* index in fixvar[] */
17964     int		i;
17965     int		ai;
17966     char_u	numbuf[NUMBUFLEN];
17967     char_u	*name;
17968 #ifdef FEAT_PROFILE
17969     proftime_T	wait_start;
17970 #endif
17971 
17972     /* If depth of calling is getting too high, don't execute the function */
17973     if (depth >= p_mfd)
17974     {
17975 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
17976 	rettv->v_type = VAR_NUMBER;
17977 	rettv->vval.v_number = -1;
17978 	return;
17979     }
17980     ++depth;
17981 
17982     line_breakcheck();		/* check for CTRL-C hit */
17983 
17984     fc.caller = current_funccal;
17985     current_funccal = &fc;
17986     fc.func = fp;
17987     fc.rettv = rettv;
17988     rettv->vval.v_number = 0;
17989     fc.linenr = 0;
17990     fc.returned = FALSE;
17991     fc.level = ex_nesting_level;
17992     /* Check if this function has a breakpoint. */
17993     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
17994     fc.dbg_tick = debug_tick;
17995 
17996     /*
17997      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
17998      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
17999      * each argument variable and saves a lot of time.
18000      */
18001     /*
18002      * Init l: variables.
18003      */
18004     init_var_dict(&fc.l_vars, &fc.l_vars_var);
18005     if (selfdict != NULL)
18006     {
18007 	/* Set l:self to "selfdict". */
18008 	v = &fc.fixvar[fixvar_idx++].var;
18009 	STRCPY(v->di_key, "self");
18010 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
18011 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
18012 	v->di_tv.v_type = VAR_DICT;
18013 	v->di_tv.v_lock = 0;
18014 	v->di_tv.vval.v_dict = selfdict;
18015 	++selfdict->dv_refcount;
18016     }
18017 
18018     /*
18019      * Init a: variables.
18020      * Set a:0 to "argcount".
18021      * Set a:000 to a list with room for the "..." arguments.
18022      */
18023     init_var_dict(&fc.l_avars, &fc.l_avars_var);
18024     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
18025 				(varnumber_T)(argcount - fp->uf_args.ga_len));
18026     v = &fc.fixvar[fixvar_idx++].var;
18027     STRCPY(v->di_key, "000");
18028     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18029     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18030     v->di_tv.v_type = VAR_LIST;
18031     v->di_tv.v_lock = VAR_FIXED;
18032     v->di_tv.vval.v_list = &fc.l_varlist;
18033     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
18034     fc.l_varlist.lv_refcount = 99999;
18035 
18036     /*
18037      * Set a:firstline to "firstline" and a:lastline to "lastline".
18038      * Set a:name to named arguments.
18039      * Set a:N to the "..." arguments.
18040      */
18041     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
18042 						      (varnumber_T)firstline);
18043     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
18044 						       (varnumber_T)lastline);
18045     for (i = 0; i < argcount; ++i)
18046     {
18047 	ai = i - fp->uf_args.ga_len;
18048 	if (ai < 0)
18049 	    /* named argument a:name */
18050 	    name = FUNCARG(fp, i);
18051 	else
18052 	{
18053 	    /* "..." argument a:1, a:2, etc. */
18054 	    sprintf((char *)numbuf, "%d", ai + 1);
18055 	    name = numbuf;
18056 	}
18057 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
18058 	{
18059 	    v = &fc.fixvar[fixvar_idx++].var;
18060 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18061 	}
18062 	else
18063 	{
18064 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
18065 							     + STRLEN(name)));
18066 	    if (v == NULL)
18067 		break;
18068 	    v->di_flags = DI_FLAGS_RO;
18069 	}
18070 	STRCPY(v->di_key, name);
18071 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18072 
18073 	/* Note: the values are copied directly to avoid alloc/free.
18074 	 * "argvars" must have VAR_FIXED for v_lock. */
18075 	v->di_tv = argvars[i];
18076 	v->di_tv.v_lock = VAR_FIXED;
18077 
18078 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
18079 	{
18080 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18081 	    fc.l_listitems[ai].li_tv = argvars[i];
18082 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18083 	}
18084     }
18085 
18086     /* Don't redraw while executing the function. */
18087     ++RedrawingDisabled;
18088     save_sourcing_name = sourcing_name;
18089     save_sourcing_lnum = sourcing_lnum;
18090     sourcing_lnum = 1;
18091     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18092 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18093     if (sourcing_name != NULL)
18094     {
18095 	if (save_sourcing_name != NULL
18096 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18097 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18098 	else
18099 	    STRCPY(sourcing_name, "function ");
18100 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18101 
18102 	if (p_verbose >= 12)
18103 	{
18104 	    ++no_wait_return;
18105 	    verbose_enter_scroll();
18106 
18107 	    smsg((char_u *)_("calling %s"), sourcing_name);
18108 	    if (p_verbose >= 14)
18109 	    {
18110 		char_u	buf[MSG_BUF_LEN];
18111 		char_u	numbuf[NUMBUFLEN];
18112 		char_u	*tofree;
18113 
18114 		msg_puts((char_u *)"(");
18115 		for (i = 0; i < argcount; ++i)
18116 		{
18117 		    if (i > 0)
18118 			msg_puts((char_u *)", ");
18119 		    if (argvars[i].v_type == VAR_NUMBER)
18120 			msg_outnum((long)argvars[i].vval.v_number);
18121 		    else
18122 		    {
18123 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18124 							    buf, MSG_BUF_CLEN);
18125 			msg_puts(buf);
18126 			vim_free(tofree);
18127 		    }
18128 		}
18129 		msg_puts((char_u *)")");
18130 	    }
18131 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18132 
18133 	    verbose_leave_scroll();
18134 	    --no_wait_return;
18135 	}
18136     }
18137 #ifdef FEAT_PROFILE
18138     if (do_profiling)
18139     {
18140 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18141 	    func_do_profile(fp);
18142 	if (fp->uf_profiling
18143 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18144 	{
18145 	    ++fp->uf_tm_count;
18146 	    profile_start(&fp->uf_tm_start);
18147 	    profile_zero(&fp->uf_tm_children);
18148 	}
18149 	script_prof_save(&wait_start);
18150     }
18151 #endif
18152 
18153     save_current_SID = current_SID;
18154     current_SID = fp->uf_script_ID;
18155     save_did_emsg = did_emsg;
18156     did_emsg = FALSE;
18157 
18158     /* call do_cmdline() to execute the lines */
18159     do_cmdline(NULL, get_func_line, (void *)&fc,
18160 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18161 
18162     --RedrawingDisabled;
18163 
18164     /* when the function was aborted because of an error, return -1 */
18165     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18166     {
18167 	clear_tv(rettv);
18168 	rettv->v_type = VAR_NUMBER;
18169 	rettv->vval.v_number = -1;
18170     }
18171 
18172 #ifdef FEAT_PROFILE
18173     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18174     {
18175 	profile_end(&fp->uf_tm_start);
18176 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18177 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18178 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18179 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18180 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18181 	{
18182 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18183 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18184 	}
18185     }
18186 #endif
18187 
18188     /* when being verbose, mention the return value */
18189     if (p_verbose >= 12)
18190     {
18191 	++no_wait_return;
18192 	verbose_enter_scroll();
18193 
18194 	if (aborting())
18195 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18196 	else if (fc.rettv->v_type == VAR_NUMBER)
18197 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18198 					       (long)fc.rettv->vval.v_number);
18199 	else
18200 	{
18201 	    char_u	buf[MSG_BUF_LEN];
18202 	    char_u	numbuf[NUMBUFLEN];
18203 	    char_u	*tofree;
18204 
18205 	    /* The value may be very long.  Skip the middle part, so that we
18206 	     * have some idea how it starts and ends. smsg() would always
18207 	     * truncate it at the end. */
18208 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18209 							   buf, MSG_BUF_CLEN);
18210 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18211 	    vim_free(tofree);
18212 	}
18213 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18214 
18215 	verbose_leave_scroll();
18216 	--no_wait_return;
18217     }
18218 
18219     vim_free(sourcing_name);
18220     sourcing_name = save_sourcing_name;
18221     sourcing_lnum = save_sourcing_lnum;
18222     current_SID = save_current_SID;
18223 #ifdef FEAT_PROFILE
18224     if (do_profiling)
18225 	script_prof_restore(&wait_start);
18226 #endif
18227 
18228     if (p_verbose >= 12 && sourcing_name != NULL)
18229     {
18230 	++no_wait_return;
18231 	verbose_enter_scroll();
18232 
18233 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18234 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18235 
18236 	verbose_leave_scroll();
18237 	--no_wait_return;
18238     }
18239 
18240     did_emsg |= save_did_emsg;
18241     current_funccal = fc.caller;
18242 
18243     /* The a: variables typevals were not alloced, only free the allocated
18244      * variables. */
18245     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18246 
18247     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18248     --depth;
18249 }
18250 
18251 /*
18252  * Add a number variable "name" to dict "dp" with value "nr".
18253  */
18254     static void
18255 add_nr_var(dp, v, name, nr)
18256     dict_T	*dp;
18257     dictitem_T	*v;
18258     char	*name;
18259     varnumber_T nr;
18260 {
18261     STRCPY(v->di_key, name);
18262     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18263     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18264     v->di_tv.v_type = VAR_NUMBER;
18265     v->di_tv.v_lock = VAR_FIXED;
18266     v->di_tv.vval.v_number = nr;
18267 }
18268 
18269 /*
18270  * ":return [expr]"
18271  */
18272     void
18273 ex_return(eap)
18274     exarg_T	*eap;
18275 {
18276     char_u	*arg = eap->arg;
18277     typval_T	rettv;
18278     int		returning = FALSE;
18279 
18280     if (current_funccal == NULL)
18281     {
18282 	EMSG(_("E133: :return not inside a function"));
18283 	return;
18284     }
18285 
18286     if (eap->skip)
18287 	++emsg_skip;
18288 
18289     eap->nextcmd = NULL;
18290     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18291 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18292     {
18293 	if (!eap->skip)
18294 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18295 	else
18296 	    clear_tv(&rettv);
18297     }
18298     /* It's safer to return also on error. */
18299     else if (!eap->skip)
18300     {
18301 	/*
18302 	 * Return unless the expression evaluation has been cancelled due to an
18303 	 * aborting error, an interrupt, or an exception.
18304 	 */
18305 	if (!aborting())
18306 	    returning = do_return(eap, FALSE, TRUE, NULL);
18307     }
18308 
18309     /* When skipping or the return gets pending, advance to the next command
18310      * in this line (!returning).  Otherwise, ignore the rest of the line.
18311      * Following lines will be ignored by get_func_line(). */
18312     if (returning)
18313 	eap->nextcmd = NULL;
18314     else if (eap->nextcmd == NULL)	    /* no argument */
18315 	eap->nextcmd = check_nextcmd(arg);
18316 
18317     if (eap->skip)
18318 	--emsg_skip;
18319 }
18320 
18321 /*
18322  * Return from a function.  Possibly makes the return pending.  Also called
18323  * for a pending return at the ":endtry" or after returning from an extra
18324  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18325  * when called due to a ":return" command.  "rettv" may point to a typval_T
18326  * with the return rettv.  Returns TRUE when the return can be carried out,
18327  * FALSE when the return gets pending.
18328  */
18329     int
18330 do_return(eap, reanimate, is_cmd, rettv)
18331     exarg_T	*eap;
18332     int		reanimate;
18333     int		is_cmd;
18334     void	*rettv;
18335 {
18336     int		idx;
18337     struct condstack *cstack = eap->cstack;
18338 
18339     if (reanimate)
18340 	/* Undo the return. */
18341 	current_funccal->returned = FALSE;
18342 
18343     /*
18344      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18345      * not in its finally clause (which then is to be executed next) is found.
18346      * In this case, make the ":return" pending for execution at the ":endtry".
18347      * Otherwise, return normally.
18348      */
18349     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18350     if (idx >= 0)
18351     {
18352 	cstack->cs_pending[idx] = CSTP_RETURN;
18353 
18354 	if (!is_cmd && !reanimate)
18355 	    /* A pending return again gets pending.  "rettv" points to an
18356 	     * allocated variable with the rettv of the original ":return"'s
18357 	     * argument if present or is NULL else. */
18358 	    cstack->cs_rettv[idx] = rettv;
18359 	else
18360 	{
18361 	    /* When undoing a return in order to make it pending, get the stored
18362 	     * return rettv. */
18363 	    if (reanimate)
18364 		rettv = current_funccal->rettv;
18365 
18366 	    if (rettv != NULL)
18367 	    {
18368 		/* Store the value of the pending return. */
18369 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18370 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18371 		else
18372 		    EMSG(_(e_outofmem));
18373 	    }
18374 	    else
18375 		cstack->cs_rettv[idx] = NULL;
18376 
18377 	    if (reanimate)
18378 	    {
18379 		/* The pending return value could be overwritten by a ":return"
18380 		 * without argument in a finally clause; reset the default
18381 		 * return value. */
18382 		current_funccal->rettv->v_type = VAR_NUMBER;
18383 		current_funccal->rettv->vval.v_number = 0;
18384 	    }
18385 	}
18386 	report_make_pending(CSTP_RETURN, rettv);
18387     }
18388     else
18389     {
18390 	current_funccal->returned = TRUE;
18391 
18392 	/* If the return is carried out now, store the return value.  For
18393 	 * a return immediately after reanimation, the value is already
18394 	 * there. */
18395 	if (!reanimate && rettv != NULL)
18396 	{
18397 	    clear_tv(current_funccal->rettv);
18398 	    *current_funccal->rettv = *(typval_T *)rettv;
18399 	    if (!is_cmd)
18400 		vim_free(rettv);
18401 	}
18402     }
18403 
18404     return idx < 0;
18405 }
18406 
18407 /*
18408  * Free the variable with a pending return value.
18409  */
18410     void
18411 discard_pending_return(rettv)
18412     void	*rettv;
18413 {
18414     free_tv((typval_T *)rettv);
18415 }
18416 
18417 /*
18418  * Generate a return command for producing the value of "rettv".  The result
18419  * is an allocated string.  Used by report_pending() for verbose messages.
18420  */
18421     char_u *
18422 get_return_cmd(rettv)
18423     void	*rettv;
18424 {
18425     char_u	*s = NULL;
18426     char_u	*tofree = NULL;
18427     char_u	numbuf[NUMBUFLEN];
18428 
18429     if (rettv != NULL)
18430 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18431     if (s == NULL)
18432 	s = (char_u *)"";
18433 
18434     STRCPY(IObuff, ":return ");
18435     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18436     if (STRLEN(s) + 8 >= IOSIZE)
18437 	STRCPY(IObuff + IOSIZE - 4, "...");
18438     vim_free(tofree);
18439     return vim_strsave(IObuff);
18440 }
18441 
18442 /*
18443  * Get next function line.
18444  * Called by do_cmdline() to get the next line.
18445  * Returns allocated string, or NULL for end of function.
18446  */
18447 /* ARGSUSED */
18448     char_u *
18449 get_func_line(c, cookie, indent)
18450     int	    c;		    /* not used */
18451     void    *cookie;
18452     int	    indent;	    /* not used */
18453 {
18454     funccall_T	*fcp = (funccall_T *)cookie;
18455     ufunc_T	*fp = fcp->func;
18456     char_u	*retval;
18457     garray_T	*gap;  /* growarray with function lines */
18458 
18459     /* If breakpoints have been added/deleted need to check for it. */
18460     if (fcp->dbg_tick != debug_tick)
18461     {
18462 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18463 							       sourcing_lnum);
18464 	fcp->dbg_tick = debug_tick;
18465     }
18466 #ifdef FEAT_PROFILE
18467     if (do_profiling)
18468 	func_line_end(cookie);
18469 #endif
18470 
18471     gap = &fp->uf_lines;
18472     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18473 	retval = NULL;
18474     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18475 	retval = NULL;
18476     else
18477     {
18478 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18479 	sourcing_lnum = fcp->linenr;
18480 #ifdef FEAT_PROFILE
18481 	if (do_profiling)
18482 	    func_line_start(cookie);
18483 #endif
18484     }
18485 
18486     /* Did we encounter a breakpoint? */
18487     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18488     {
18489 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18490 	/* Find next breakpoint. */
18491 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18492 							       sourcing_lnum);
18493 	fcp->dbg_tick = debug_tick;
18494     }
18495 
18496     return retval;
18497 }
18498 
18499 #if defined(FEAT_PROFILE) || defined(PROTO)
18500 /*
18501  * Called when starting to read a function line.
18502  * "sourcing_lnum" must be correct!
18503  * When skipping lines it may not actually be executed, but we won't find out
18504  * until later and we need to store the time now.
18505  */
18506     void
18507 func_line_start(cookie)
18508     void    *cookie;
18509 {
18510     funccall_T	*fcp = (funccall_T *)cookie;
18511     ufunc_T	*fp = fcp->func;
18512 
18513     if (fp->uf_profiling && sourcing_lnum >= 1
18514 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18515     {
18516 	fp->uf_tml_idx = sourcing_lnum - 1;
18517 	fp->uf_tml_execed = FALSE;
18518 	profile_start(&fp->uf_tml_start);
18519 	profile_zero(&fp->uf_tml_children);
18520 	profile_get_wait(&fp->uf_tml_wait);
18521     }
18522 }
18523 
18524 /*
18525  * Called when actually executing a function line.
18526  */
18527     void
18528 func_line_exec(cookie)
18529     void    *cookie;
18530 {
18531     funccall_T	*fcp = (funccall_T *)cookie;
18532     ufunc_T	*fp = fcp->func;
18533 
18534     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18535 	fp->uf_tml_execed = TRUE;
18536 }
18537 
18538 /*
18539  * Called when done with a function line.
18540  */
18541     void
18542 func_line_end(cookie)
18543     void    *cookie;
18544 {
18545     funccall_T	*fcp = (funccall_T *)cookie;
18546     ufunc_T	*fp = fcp->func;
18547 
18548     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18549     {
18550 	if (fp->uf_tml_execed)
18551 	{
18552 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18553 	    profile_end(&fp->uf_tml_start);
18554 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18555 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18556 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18557 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18558 	}
18559 	fp->uf_tml_idx = -1;
18560     }
18561 }
18562 #endif
18563 
18564 /*
18565  * Return TRUE if the currently active function should be ended, because a
18566  * return was encountered or an error occured.  Used inside a ":while".
18567  */
18568     int
18569 func_has_ended(cookie)
18570     void    *cookie;
18571 {
18572     funccall_T  *fcp = (funccall_T *)cookie;
18573 
18574     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18575      * an error inside a try conditional. */
18576     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18577 	    || fcp->returned);
18578 }
18579 
18580 /*
18581  * return TRUE if cookie indicates a function which "abort"s on errors.
18582  */
18583     int
18584 func_has_abort(cookie)
18585     void    *cookie;
18586 {
18587     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18588 }
18589 
18590 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18591 typedef enum
18592 {
18593     VAR_FLAVOUR_DEFAULT,
18594     VAR_FLAVOUR_SESSION,
18595     VAR_FLAVOUR_VIMINFO
18596 } var_flavour_T;
18597 
18598 static var_flavour_T var_flavour __ARGS((char_u *varname));
18599 
18600     static var_flavour_T
18601 var_flavour(varname)
18602     char_u *varname;
18603 {
18604     char_u *p = varname;
18605 
18606     if (ASCII_ISUPPER(*p))
18607     {
18608 	while (*(++p))
18609 	    if (ASCII_ISLOWER(*p))
18610 		return VAR_FLAVOUR_SESSION;
18611 	return VAR_FLAVOUR_VIMINFO;
18612     }
18613     else
18614 	return VAR_FLAVOUR_DEFAULT;
18615 }
18616 #endif
18617 
18618 #if defined(FEAT_VIMINFO) || defined(PROTO)
18619 /*
18620  * Restore global vars that start with a capital from the viminfo file
18621  */
18622     int
18623 read_viminfo_varlist(virp, writing)
18624     vir_T	*virp;
18625     int		writing;
18626 {
18627     char_u	*tab;
18628     int		is_string = FALSE;
18629     typval_T	tv;
18630 
18631     if (!writing && (find_viminfo_parameter('!') != NULL))
18632     {
18633 	tab = vim_strchr(virp->vir_line + 1, '\t');
18634 	if (tab != NULL)
18635 	{
18636 	    *tab++ = '\0';	/* isolate the variable name */
18637 	    if (*tab == 'S')	/* string var */
18638 		is_string = TRUE;
18639 
18640 	    tab = vim_strchr(tab, '\t');
18641 	    if (tab != NULL)
18642 	    {
18643 		if (is_string)
18644 		{
18645 		    tv.v_type = VAR_STRING;
18646 		    tv.vval.v_string = viminfo_readstring(virp,
18647 				       (int)(tab - virp->vir_line + 1), TRUE);
18648 		}
18649 		else
18650 		{
18651 		    tv.v_type = VAR_NUMBER;
18652 		    tv.vval.v_number = atol((char *)tab + 1);
18653 		}
18654 		set_var(virp->vir_line + 1, &tv, FALSE);
18655 		if (is_string)
18656 		    vim_free(tv.vval.v_string);
18657 	    }
18658 	}
18659     }
18660 
18661     return viminfo_readline(virp);
18662 }
18663 
18664 /*
18665  * Write global vars that start with a capital to the viminfo file
18666  */
18667     void
18668 write_viminfo_varlist(fp)
18669     FILE    *fp;
18670 {
18671     hashitem_T	*hi;
18672     dictitem_T	*this_var;
18673     int		todo;
18674     char	*s;
18675     char_u	*p;
18676     char_u	*tofree;
18677     char_u	numbuf[NUMBUFLEN];
18678 
18679     if (find_viminfo_parameter('!') == NULL)
18680 	return;
18681 
18682     fprintf(fp, _("\n# global variables:\n"));
18683 
18684     todo = globvarht.ht_used;
18685     for (hi = globvarht.ht_array; todo > 0; ++hi)
18686     {
18687 	if (!HASHITEM_EMPTY(hi))
18688 	{
18689 	    --todo;
18690 	    this_var = HI2DI(hi);
18691 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18692 	    {
18693 		switch (this_var->di_tv.v_type)
18694 		{
18695 		    case VAR_STRING: s = "STR"; break;
18696 		    case VAR_NUMBER: s = "NUM"; break;
18697 		    default: continue;
18698 		}
18699 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
18700 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
18701 		if (p != NULL)
18702 		    viminfo_writestring(fp, p);
18703 		vim_free(tofree);
18704 	    }
18705 	}
18706     }
18707 }
18708 #endif
18709 
18710 #if defined(FEAT_SESSION) || defined(PROTO)
18711     int
18712 store_session_globals(fd)
18713     FILE	*fd;
18714 {
18715     hashitem_T	*hi;
18716     dictitem_T	*this_var;
18717     int		todo;
18718     char_u	*p, *t;
18719 
18720     todo = globvarht.ht_used;
18721     for (hi = globvarht.ht_array; todo > 0; ++hi)
18722     {
18723 	if (!HASHITEM_EMPTY(hi))
18724 	{
18725 	    --todo;
18726 	    this_var = HI2DI(hi);
18727 	    if ((this_var->di_tv.v_type == VAR_NUMBER
18728 			|| this_var->di_tv.v_type == VAR_STRING)
18729 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
18730 	    {
18731 		/* Escape special characters with a backslash.  Turn a LF and
18732 		 * CR into \n and \r. */
18733 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
18734 							(char_u *)"\\\"\n\r");
18735 		if (p == NULL)	    /* out of memory */
18736 		    break;
18737 		for (t = p; *t != NUL; ++t)
18738 		    if (*t == '\n')
18739 			*t = 'n';
18740 		    else if (*t == '\r')
18741 			*t = 'r';
18742 		if ((fprintf(fd, "let %s = %c%s%c",
18743 				this_var->di_key,
18744 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18745 									: ' ',
18746 				p,
18747 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18748 								   : ' ') < 0)
18749 			|| put_eol(fd) == FAIL)
18750 		{
18751 		    vim_free(p);
18752 		    return FAIL;
18753 		}
18754 		vim_free(p);
18755 	    }
18756 	}
18757     }
18758     return OK;
18759 }
18760 #endif
18761 
18762 /*
18763  * Display script name where an item was last set.
18764  * Should only be invoked when 'verbose' is non-zero.
18765  */
18766     void
18767 last_set_msg(scriptID)
18768     scid_T scriptID;
18769 {
18770     if (scriptID != 0)
18771     {
18772 	verbose_enter();
18773 	MSG_PUTS(_("\n\tLast set from "));
18774 	MSG_PUTS(get_scriptname(scriptID));
18775 	verbose_leave();
18776     }
18777 }
18778 
18779 #endif /* FEAT_EVAL */
18780 
18781 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
18782 
18783 
18784 #ifdef WIN3264
18785 /*
18786  * Functions for ":8" filename modifier: get 8.3 version of a filename.
18787  */
18788 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18789 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
18790 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18791 
18792 /*
18793  * Get the short pathname of a file.
18794  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
18795  */
18796     static int
18797 get_short_pathname(fnamep, bufp, fnamelen)
18798     char_u	**fnamep;
18799     char_u	**bufp;
18800     int		*fnamelen;
18801 {
18802     int		l,len;
18803     char_u	*newbuf;
18804 
18805     len = *fnamelen;
18806 
18807     l = GetShortPathName(*fnamep, *fnamep, len);
18808     if (l > len - 1)
18809     {
18810 	/* If that doesn't work (not enough space), then save the string
18811 	 * and try again with a new buffer big enough
18812 	 */
18813 	newbuf = vim_strnsave(*fnamep, l);
18814 	if (newbuf == NULL)
18815 	    return 0;
18816 
18817 	vim_free(*bufp);
18818 	*fnamep = *bufp = newbuf;
18819 
18820 	l = GetShortPathName(*fnamep,*fnamep,l+1);
18821 
18822 	/* Really should always succeed, as the buffer is big enough */
18823     }
18824 
18825     *fnamelen = l;
18826     return 1;
18827 }
18828 
18829 /*
18830  * Create a short path name.  Returns the length of the buffer it needs.
18831  * Doesn't copy over the end of the buffer passed in.
18832  */
18833     static int
18834 shortpath_for_invalid_fname(fname, bufp, fnamelen)
18835     char_u	**fname;
18836     char_u	**bufp;
18837     int		*fnamelen;
18838 {
18839     char_u	*s, *p, *pbuf2, *pbuf3;
18840     char_u	ch;
18841     int		len, len2, plen, slen;
18842 
18843     /* Make a copy */
18844     len2 = *fnamelen;
18845     pbuf2 = vim_strnsave(*fname, len2);
18846     pbuf3 = NULL;
18847 
18848     s = pbuf2 + len2 - 1; /* Find the end */
18849     slen = 1;
18850     plen = len2;
18851 
18852     if (after_pathsep(pbuf2, s + 1))
18853     {
18854 	--s;
18855 	++slen;
18856 	--plen;
18857     }
18858 
18859     do
18860     {
18861 	/* Go back one path-seperator */
18862 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
18863 	{
18864 	    --s;
18865 	    ++slen;
18866 	    --plen;
18867 	}
18868 	if (s <= pbuf2)
18869 	    break;
18870 
18871 	/* Remeber the character that is about to be blatted */
18872 	ch = *s;
18873 	*s = 0; /* get_short_pathname requires a null-terminated string */
18874 
18875 	/* Try it in situ */
18876 	p = pbuf2;
18877 	if (!get_short_pathname(&p, &pbuf3, &plen))
18878 	{
18879 	    vim_free(pbuf2);
18880 	    return -1;
18881 	}
18882 	*s = ch;    /* Preserve the string */
18883     } while (plen == 0);
18884 
18885     if (plen > 0)
18886     {
18887 	/* Remeber the length of the new string.  */
18888 	*fnamelen = len = plen + slen;
18889 	vim_free(*bufp);
18890 	if (len > len2)
18891 	{
18892 	    /* If there's not enough space in the currently allocated string,
18893 	     * then copy it to a buffer big enough.
18894 	     */
18895 	    *fname= *bufp = vim_strnsave(p, len);
18896 	    if (*fname == NULL)
18897 		return -1;
18898 	}
18899 	else
18900 	{
18901 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
18902 	    *fname = *bufp = pbuf2;
18903 	    if (p != pbuf2)
18904 		strncpy(*fname, p, plen);
18905 	    pbuf2 = NULL;
18906 	}
18907 	/* Concat the next bit */
18908 	strncpy(*fname + plen, s, slen);
18909 	(*fname)[len] = '\0';
18910     }
18911     vim_free(pbuf3);
18912     vim_free(pbuf2);
18913     return 0;
18914 }
18915 
18916 /*
18917  * Get a pathname for a partial path.
18918  */
18919     static int
18920 shortpath_for_partial(fnamep, bufp, fnamelen)
18921     char_u	**fnamep;
18922     char_u	**bufp;
18923     int		*fnamelen;
18924 {
18925     int		sepcount, len, tflen;
18926     char_u	*p;
18927     char_u	*pbuf, *tfname;
18928     int		hasTilde;
18929 
18930     /* Count up the path seperators from the RHS.. so we know which part
18931      * of the path to return.
18932      */
18933     sepcount = 0;
18934     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
18935 	if (vim_ispathsep(*p))
18936 	    ++sepcount;
18937 
18938     /* Need full path first (use expand_env() to remove a "~/") */
18939     hasTilde = (**fnamep == '~');
18940     if (hasTilde)
18941 	pbuf = tfname = expand_env_save(*fnamep);
18942     else
18943 	pbuf = tfname = FullName_save(*fnamep, FALSE);
18944 
18945     len = tflen = STRLEN(tfname);
18946 
18947     if (!get_short_pathname(&tfname, &pbuf, &len))
18948 	return -1;
18949 
18950     if (len == 0)
18951     {
18952 	/* Don't have a valid filename, so shorten the rest of the
18953 	 * path if we can. This CAN give us invalid 8.3 filenames, but
18954 	 * there's not a lot of point in guessing what it might be.
18955 	 */
18956 	len = tflen;
18957 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
18958 	    return -1;
18959     }
18960 
18961     /* Count the paths backward to find the beginning of the desired string. */
18962     for (p = tfname + len - 1; p >= tfname; --p)
18963     {
18964 #ifdef FEAT_MBYTE
18965 	if (has_mbyte)
18966 	    p -= mb_head_off(tfname, p);
18967 #endif
18968 	if (vim_ispathsep(*p))
18969 	{
18970 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
18971 		break;
18972 	    else
18973 		sepcount --;
18974 	}
18975     }
18976     if (hasTilde)
18977     {
18978 	--p;
18979 	if (p >= tfname)
18980 	    *p = '~';
18981 	else
18982 	    return -1;
18983     }
18984     else
18985 	++p;
18986 
18987     /* Copy in the string - p indexes into tfname - allocated at pbuf */
18988     vim_free(*bufp);
18989     *fnamelen = (int)STRLEN(p);
18990     *bufp = pbuf;
18991     *fnamep = p;
18992 
18993     return 0;
18994 }
18995 #endif /* WIN3264 */
18996 
18997 /*
18998  * Adjust a filename, according to a string of modifiers.
18999  * *fnamep must be NUL terminated when called.  When returning, the length is
19000  * determined by *fnamelen.
19001  * Returns valid flags.
19002  * When there is an error, *fnamep is set to NULL.
19003  */
19004     int
19005 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
19006     char_u	*src;		/* string with modifiers */
19007     int		*usedlen;	/* characters after src that are used */
19008     char_u	**fnamep;	/* file name so far */
19009     char_u	**bufp;		/* buffer for allocated file name or NULL */
19010     int		*fnamelen;	/* length of fnamep */
19011 {
19012     int		valid = 0;
19013     char_u	*tail;
19014     char_u	*s, *p, *pbuf;
19015     char_u	dirname[MAXPATHL];
19016     int		c;
19017     int		has_fullname = 0;
19018 #ifdef WIN3264
19019     int		has_shortname = 0;
19020 #endif
19021 
19022 repeat:
19023     /* ":p" - full path/file_name */
19024     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
19025     {
19026 	has_fullname = 1;
19027 
19028 	valid |= VALID_PATH;
19029 	*usedlen += 2;
19030 
19031 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
19032 	if ((*fnamep)[0] == '~'
19033 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
19034 		&& ((*fnamep)[1] == '/'
19035 # ifdef BACKSLASH_IN_FILENAME
19036 		    || (*fnamep)[1] == '\\'
19037 # endif
19038 		    || (*fnamep)[1] == NUL)
19039 
19040 #endif
19041 	   )
19042 	{
19043 	    *fnamep = expand_env_save(*fnamep);
19044 	    vim_free(*bufp);	/* free any allocated file name */
19045 	    *bufp = *fnamep;
19046 	    if (*fnamep == NULL)
19047 		return -1;
19048 	}
19049 
19050 	/* When "/." or "/.." is used: force expansion to get rid of it. */
19051 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
19052 	{
19053 	    if (vim_ispathsep(*p)
19054 		    && p[1] == '.'
19055 		    && (p[2] == NUL
19056 			|| vim_ispathsep(p[2])
19057 			|| (p[2] == '.'
19058 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
19059 		break;
19060 	}
19061 
19062 	/* FullName_save() is slow, don't use it when not needed. */
19063 	if (*p != NUL || !vim_isAbsName(*fnamep))
19064 	{
19065 	    *fnamep = FullName_save(*fnamep, *p != NUL);
19066 	    vim_free(*bufp);	/* free any allocated file name */
19067 	    *bufp = *fnamep;
19068 	    if (*fnamep == NULL)
19069 		return -1;
19070 	}
19071 
19072 	/* Append a path separator to a directory. */
19073 	if (mch_isdir(*fnamep))
19074 	{
19075 	    /* Make room for one or two extra characters. */
19076 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
19077 	    vim_free(*bufp);	/* free any allocated file name */
19078 	    *bufp = *fnamep;
19079 	    if (*fnamep == NULL)
19080 		return -1;
19081 	    add_pathsep(*fnamep);
19082 	}
19083     }
19084 
19085     /* ":." - path relative to the current directory */
19086     /* ":~" - path relative to the home directory */
19087     /* ":8" - shortname path - postponed till after */
19088     while (src[*usedlen] == ':'
19089 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
19090     {
19091 	*usedlen += 2;
19092 	if (c == '8')
19093 	{
19094 #ifdef WIN3264
19095 	    has_shortname = 1; /* Postpone this. */
19096 #endif
19097 	    continue;
19098 	}
19099 	pbuf = NULL;
19100 	/* Need full path first (use expand_env() to remove a "~/") */
19101 	if (!has_fullname)
19102 	{
19103 	    if (c == '.' && **fnamep == '~')
19104 		p = pbuf = expand_env_save(*fnamep);
19105 	    else
19106 		p = pbuf = FullName_save(*fnamep, FALSE);
19107 	}
19108 	else
19109 	    p = *fnamep;
19110 
19111 	has_fullname = 0;
19112 
19113 	if (p != NULL)
19114 	{
19115 	    if (c == '.')
19116 	    {
19117 		mch_dirname(dirname, MAXPATHL);
19118 		s = shorten_fname(p, dirname);
19119 		if (s != NULL)
19120 		{
19121 		    *fnamep = s;
19122 		    if (pbuf != NULL)
19123 		    {
19124 			vim_free(*bufp);   /* free any allocated file name */
19125 			*bufp = pbuf;
19126 			pbuf = NULL;
19127 		    }
19128 		}
19129 	    }
19130 	    else
19131 	    {
19132 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19133 		/* Only replace it when it starts with '~' */
19134 		if (*dirname == '~')
19135 		{
19136 		    s = vim_strsave(dirname);
19137 		    if (s != NULL)
19138 		    {
19139 			*fnamep = s;
19140 			vim_free(*bufp);
19141 			*bufp = s;
19142 		    }
19143 		}
19144 	    }
19145 	    vim_free(pbuf);
19146 	}
19147     }
19148 
19149     tail = gettail(*fnamep);
19150     *fnamelen = (int)STRLEN(*fnamep);
19151 
19152     /* ":h" - head, remove "/file_name", can be repeated  */
19153     /* Don't remove the first "/" or "c:\" */
19154     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19155     {
19156 	valid |= VALID_HEAD;
19157 	*usedlen += 2;
19158 	s = get_past_head(*fnamep);
19159 	while (tail > s && after_pathsep(s, tail))
19160 	    --tail;
19161 	*fnamelen = (int)(tail - *fnamep);
19162 #ifdef VMS
19163 	if (*fnamelen > 0)
19164 	    *fnamelen += 1; /* the path separator is part of the path */
19165 #endif
19166 	while (tail > s && !after_pathsep(s, tail))
19167 	    mb_ptr_back(*fnamep, tail);
19168     }
19169 
19170     /* ":8" - shortname  */
19171     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19172     {
19173 	*usedlen += 2;
19174 #ifdef WIN3264
19175 	has_shortname = 1;
19176 #endif
19177     }
19178 
19179 #ifdef WIN3264
19180     /* Check shortname after we have done 'heads' and before we do 'tails'
19181      */
19182     if (has_shortname)
19183     {
19184 	pbuf = NULL;
19185 	/* Copy the string if it is shortened by :h */
19186 	if (*fnamelen < (int)STRLEN(*fnamep))
19187 	{
19188 	    p = vim_strnsave(*fnamep, *fnamelen);
19189 	    if (p == 0)
19190 		return -1;
19191 	    vim_free(*bufp);
19192 	    *bufp = *fnamep = p;
19193 	}
19194 
19195 	/* Split into two implementations - makes it easier.  First is where
19196 	 * there isn't a full name already, second is where there is.
19197 	 */
19198 	if (!has_fullname && !vim_isAbsName(*fnamep))
19199 	{
19200 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19201 		return -1;
19202 	}
19203 	else
19204 	{
19205 	    int		l;
19206 
19207 	    /* Simple case, already have the full-name
19208 	     * Nearly always shorter, so try first time. */
19209 	    l = *fnamelen;
19210 	    if (!get_short_pathname(fnamep, bufp, &l))
19211 		return -1;
19212 
19213 	    if (l == 0)
19214 	    {
19215 		/* Couldn't find the filename.. search the paths.
19216 		 */
19217 		l = *fnamelen;
19218 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19219 		    return -1;
19220 	    }
19221 	    *fnamelen = l;
19222 	}
19223     }
19224 #endif /* WIN3264 */
19225 
19226     /* ":t" - tail, just the basename */
19227     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19228     {
19229 	*usedlen += 2;
19230 	*fnamelen -= (int)(tail - *fnamep);
19231 	*fnamep = tail;
19232     }
19233 
19234     /* ":e" - extension, can be repeated */
19235     /* ":r" - root, without extension, can be repeated */
19236     while (src[*usedlen] == ':'
19237 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19238     {
19239 	/* find a '.' in the tail:
19240 	 * - for second :e: before the current fname
19241 	 * - otherwise: The last '.'
19242 	 */
19243 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19244 	    s = *fnamep - 2;
19245 	else
19246 	    s = *fnamep + *fnamelen - 1;
19247 	for ( ; s > tail; --s)
19248 	    if (s[0] == '.')
19249 		break;
19250 	if (src[*usedlen + 1] == 'e')		/* :e */
19251 	{
19252 	    if (s > tail)
19253 	    {
19254 		*fnamelen += (int)(*fnamep - (s + 1));
19255 		*fnamep = s + 1;
19256 #ifdef VMS
19257 		/* cut version from the extension */
19258 		s = *fnamep + *fnamelen - 1;
19259 		for ( ; s > *fnamep; --s)
19260 		    if (s[0] == ';')
19261 			break;
19262 		if (s > *fnamep)
19263 		    *fnamelen = s - *fnamep;
19264 #endif
19265 	    }
19266 	    else if (*fnamep <= tail)
19267 		*fnamelen = 0;
19268 	}
19269 	else				/* :r */
19270 	{
19271 	    if (s > tail)	/* remove one extension */
19272 		*fnamelen = (int)(s - *fnamep);
19273 	}
19274 	*usedlen += 2;
19275     }
19276 
19277     /* ":s?pat?foo?" - substitute */
19278     /* ":gs?pat?foo?" - global substitute */
19279     if (src[*usedlen] == ':'
19280 	    && (src[*usedlen + 1] == 's'
19281 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19282     {
19283 	char_u	    *str;
19284 	char_u	    *pat;
19285 	char_u	    *sub;
19286 	int	    sep;
19287 	char_u	    *flags;
19288 	int	    didit = FALSE;
19289 
19290 	flags = (char_u *)"";
19291 	s = src + *usedlen + 2;
19292 	if (src[*usedlen + 1] == 'g')
19293 	{
19294 	    flags = (char_u *)"g";
19295 	    ++s;
19296 	}
19297 
19298 	sep = *s++;
19299 	if (sep)
19300 	{
19301 	    /* find end of pattern */
19302 	    p = vim_strchr(s, sep);
19303 	    if (p != NULL)
19304 	    {
19305 		pat = vim_strnsave(s, (int)(p - s));
19306 		if (pat != NULL)
19307 		{
19308 		    s = p + 1;
19309 		    /* find end of substitution */
19310 		    p = vim_strchr(s, sep);
19311 		    if (p != NULL)
19312 		    {
19313 			sub = vim_strnsave(s, (int)(p - s));
19314 			str = vim_strnsave(*fnamep, *fnamelen);
19315 			if (sub != NULL && str != NULL)
19316 			{
19317 			    *usedlen = (int)(p + 1 - src);
19318 			    s = do_string_sub(str, pat, sub, flags);
19319 			    if (s != NULL)
19320 			    {
19321 				*fnamep = s;
19322 				*fnamelen = (int)STRLEN(s);
19323 				vim_free(*bufp);
19324 				*bufp = s;
19325 				didit = TRUE;
19326 			    }
19327 			}
19328 			vim_free(sub);
19329 			vim_free(str);
19330 		    }
19331 		    vim_free(pat);
19332 		}
19333 	    }
19334 	    /* after using ":s", repeat all the modifiers */
19335 	    if (didit)
19336 		goto repeat;
19337 	}
19338     }
19339 
19340     return valid;
19341 }
19342 
19343 /*
19344  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19345  * "flags" can be "g" to do a global substitute.
19346  * Returns an allocated string, NULL for error.
19347  */
19348     char_u *
19349 do_string_sub(str, pat, sub, flags)
19350     char_u	*str;
19351     char_u	*pat;
19352     char_u	*sub;
19353     char_u	*flags;
19354 {
19355     int		sublen;
19356     regmatch_T	regmatch;
19357     int		i;
19358     int		do_all;
19359     char_u	*tail;
19360     garray_T	ga;
19361     char_u	*ret;
19362     char_u	*save_cpo;
19363 
19364     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19365     save_cpo = p_cpo;
19366     p_cpo = (char_u *)"";
19367 
19368     ga_init2(&ga, 1, 200);
19369 
19370     do_all = (flags[0] == 'g');
19371 
19372     regmatch.rm_ic = p_ic;
19373     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19374     if (regmatch.regprog != NULL)
19375     {
19376 	tail = str;
19377 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19378 	{
19379 	    /*
19380 	     * Get some space for a temporary buffer to do the substitution
19381 	     * into.  It will contain:
19382 	     * - The text up to where the match is.
19383 	     * - The substituted text.
19384 	     * - The text after the match.
19385 	     */
19386 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19387 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19388 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19389 	    {
19390 		ga_clear(&ga);
19391 		break;
19392 	    }
19393 
19394 	    /* copy the text up to where the match is */
19395 	    i = (int)(regmatch.startp[0] - tail);
19396 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19397 	    /* add the substituted text */
19398 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19399 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19400 	    ga.ga_len += i + sublen - 1;
19401 	    /* avoid getting stuck on a match with an empty string */
19402 	    if (tail == regmatch.endp[0])
19403 	    {
19404 		if (*tail == NUL)
19405 		    break;
19406 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19407 		++ga.ga_len;
19408 	    }
19409 	    else
19410 	    {
19411 		tail = regmatch.endp[0];
19412 		if (*tail == NUL)
19413 		    break;
19414 	    }
19415 	    if (!do_all)
19416 		break;
19417 	}
19418 
19419 	if (ga.ga_data != NULL)
19420 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19421 
19422 	vim_free(regmatch.regprog);
19423     }
19424 
19425     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19426     ga_clear(&ga);
19427     p_cpo = save_cpo;
19428 
19429     return ret;
19430 }
19431 
19432 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19433