xref: /vim-8.2.3635/src/eval.c (revision 87e25fdf) 
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_range __ARGS((typval_T *argvars, typval_T *rettv));
566 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
567 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
568 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
593 #ifdef HAVE_STRFTIME
594 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
595 #endif
596 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
602 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
603 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
604 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
605 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
625 
626 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum));
627 static int get_env_len __ARGS((char_u **arg));
628 static int get_id_len __ARGS((char_u **arg));
629 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
630 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
631 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
632 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
633 				   valid character */
634 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
635 static int eval_isnamec __ARGS((int c));
636 static int eval_isnamec1 __ARGS((int c));
637 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
638 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
639 static typval_T *alloc_tv __ARGS((void));
640 static typval_T *alloc_string_tv __ARGS((char_u *string));
641 static void free_tv __ARGS((typval_T *varp));
642 static void init_tv __ARGS((typval_T *varp));
643 static long get_tv_number __ARGS((typval_T *varp));
644 static long get_tv_number_chk __ARGS((typval_T *varp, int *denote));
645 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
646 static char_u *get_tv_string __ARGS((typval_T *varp));
647 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
648 static char_u *get_tv_string_chk __ARGS((typval_T *varp));
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 some vimL function and return the result as a string
1409  * Uses argv[argc] for the function arguments.
1410  */
1411     void *
1412 call_func_retstr(func, argc, argv, safe)
1413     char_u      *func;
1414     int		argc;
1415     char_u      **argv;
1416     int		safe;		/* use the sandbox */
1417 {
1418     typval_T	rettv;
1419     char_u	*retval = NULL;
1420 
1421     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1422 	return NULL;
1423 
1424     retval = vim_strsave(get_tv_string(&rettv));
1425 
1426     clear_tv(&rettv);
1427 
1428     return retval;
1429 }
1430 
1431 /*
1432  * Call some vimL function and return the result as a list
1433  * Uses argv[argc] for the function arguments.
1434  */
1435     void *
1436 call_func_retlist(func, argc, argv, safe)
1437     char_u      *func;
1438     int		argc;
1439     char_u      **argv;
1440     int		safe;		/* use the sandbox */
1441 {
1442     typval_T	rettv;
1443 
1444     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1445 	return NULL;
1446 
1447     if (rettv.v_type != VAR_LIST)
1448     {
1449 	clear_tv(&rettv);
1450 	return NULL;
1451     }
1452 
1453     return rettv.vval.v_list;
1454 }
1455 
1456 #endif
1457 
1458 /*
1459  * Save the current function call pointer, and set it to NULL.
1460  * Used when executing autocommands and for ":source".
1461  */
1462     void *
1463 save_funccal()
1464 {
1465     funccall_T *fc = current_funccal;
1466 
1467     current_funccal = NULL;
1468     return (void *)fc;
1469 }
1470 
1471     void
1472 restore_funccal(vfc)
1473     void *vfc;
1474 {
1475     funccall_T *fc = (funccall_T *)vfc;
1476 
1477     current_funccal = fc;
1478 }
1479 
1480 #if defined(FEAT_PROFILE) || defined(PROTO)
1481 /*
1482  * Prepare profiling for entering a child or something else that is not
1483  * counted for the script/function itself.
1484  * Should always be called in pair with prof_child_exit().
1485  */
1486     void
1487 prof_child_enter(tm)
1488     proftime_T *tm;	/* place to store waittime */
1489 {
1490     funccall_T *fc = current_funccal;
1491 
1492     if (fc != NULL && fc->func->uf_profiling)
1493 	profile_start(&fc->prof_child);
1494     script_prof_save(tm);
1495 }
1496 
1497 /*
1498  * Take care of time spent in a child.
1499  * Should always be called after prof_child_enter().
1500  */
1501     void
1502 prof_child_exit(tm)
1503     proftime_T *tm;	/* where waittime was stored */
1504 {
1505     funccall_T *fc = current_funccal;
1506 
1507     if (fc != NULL && fc->func->uf_profiling)
1508     {
1509 	profile_end(&fc->prof_child);
1510 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1511 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1512 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1513     }
1514     script_prof_restore(tm);
1515 }
1516 #endif
1517 
1518 
1519 #ifdef FEAT_FOLDING
1520 /*
1521  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1522  * it in "*cp".  Doesn't give error messages.
1523  */
1524     int
1525 eval_foldexpr(arg, cp)
1526     char_u	*arg;
1527     int		*cp;
1528 {
1529     typval_T	tv;
1530     int		retval;
1531     char_u	*s;
1532 
1533     ++emsg_off;
1534     ++sandbox;
1535     *cp = NUL;
1536     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1537 	retval = 0;
1538     else
1539     {
1540 	/* If the result is a number, just return the number. */
1541 	if (tv.v_type == VAR_NUMBER)
1542 	    retval = tv.vval.v_number;
1543 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1544 	    retval = 0;
1545 	else
1546 	{
1547 	    /* If the result is a string, check if there is a non-digit before
1548 	     * the number. */
1549 	    s = tv.vval.v_string;
1550 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1551 		*cp = *s++;
1552 	    retval = atol((char *)s);
1553 	}
1554 	clear_tv(&tv);
1555     }
1556     --emsg_off;
1557     --sandbox;
1558 
1559     return retval;
1560 }
1561 #endif
1562 
1563 /*
1564  * ":let"			list all variable values
1565  * ":let var1 var2"		list variable values
1566  * ":let var = expr"		assignment command.
1567  * ":let var += expr"		assignment command.
1568  * ":let var -= expr"		assignment command.
1569  * ":let var .= expr"		assignment command.
1570  * ":let [var1, var2] = expr"	unpack list.
1571  */
1572     void
1573 ex_let(eap)
1574     exarg_T	*eap;
1575 {
1576     char_u	*arg = eap->arg;
1577     char_u	*expr = NULL;
1578     typval_T	rettv;
1579     int		i;
1580     int		var_count = 0;
1581     int		semicolon = 0;
1582     char_u	op[2];
1583 
1584     expr = skip_var_list(arg, &var_count, &semicolon);
1585     if (expr == NULL)
1586 	return;
1587     expr = vim_strchr(expr, '=');
1588     if (expr == NULL)
1589     {
1590 	/*
1591 	 * ":let" without "=": list variables
1592 	 */
1593 	if (*arg == '[')
1594 	    EMSG(_(e_invarg));
1595 	else if (!ends_excmd(*arg))
1596 	    /* ":let var1 var2" */
1597 	    arg = list_arg_vars(eap, arg);
1598 	else if (!eap->skip)
1599 	{
1600 	    /* ":let" */
1601 	    list_glob_vars();
1602 	    list_buf_vars();
1603 	    list_win_vars();
1604 	    list_vim_vars();
1605 	}
1606 	eap->nextcmd = check_nextcmd(arg);
1607     }
1608     else
1609     {
1610 	op[0] = '=';
1611 	op[1] = NUL;
1612 	if (expr > arg)
1613 	{
1614 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1615 		op[0] = expr[-1];   /* +=, -= or .= */
1616 	}
1617 	expr = skipwhite(expr + 1);
1618 
1619 	if (eap->skip)
1620 	    ++emsg_skip;
1621 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1622 	if (eap->skip)
1623 	{
1624 	    if (i != FAIL)
1625 		clear_tv(&rettv);
1626 	    --emsg_skip;
1627 	}
1628 	else if (i != FAIL)
1629 	{
1630 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1631 									  op);
1632 	    clear_tv(&rettv);
1633 	}
1634     }
1635 }
1636 
1637 /*
1638  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1639  * Handles both "var" with any type and "[var, var; var]" with a list type.
1640  * When "nextchars" is not NULL it points to a string with characters that
1641  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1642  * or concatenate.
1643  * Returns OK or FAIL;
1644  */
1645     static int
1646 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1647     char_u	*arg_start;
1648     typval_T	*tv;
1649     int		copy;		/* copy values from "tv", don't move */
1650     int		semicolon;	/* from skip_var_list() */
1651     int		var_count;	/* from skip_var_list() */
1652     char_u	*nextchars;
1653 {
1654     char_u	*arg = arg_start;
1655     list_T	*l;
1656     int		i;
1657     listitem_T	*item;
1658     typval_T	ltv;
1659 
1660     if (*arg != '[')
1661     {
1662 	/*
1663 	 * ":let var = expr" or ":for var in list"
1664 	 */
1665 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1666 	    return FAIL;
1667 	return OK;
1668     }
1669 
1670     /*
1671      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1672      */
1673     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1674     {
1675 	EMSG(_(e_listreq));
1676 	return FAIL;
1677     }
1678 
1679     i = list_len(l);
1680     if (semicolon == 0 && var_count < i)
1681     {
1682 	EMSG(_("E687: Less targets than List items"));
1683 	return FAIL;
1684     }
1685     if (var_count - semicolon > i)
1686     {
1687 	EMSG(_("E688: More targets than List items"));
1688 	return FAIL;
1689     }
1690 
1691     item = l->lv_first;
1692     while (*arg != ']')
1693     {
1694 	arg = skipwhite(arg + 1);
1695 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1696 	item = item->li_next;
1697 	if (arg == NULL)
1698 	    return FAIL;
1699 
1700 	arg = skipwhite(arg);
1701 	if (*arg == ';')
1702 	{
1703 	    /* Put the rest of the list (may be empty) in the var after ';'.
1704 	     * Create a new list for this. */
1705 	    l = list_alloc();
1706 	    if (l == NULL)
1707 		return FAIL;
1708 	    while (item != NULL)
1709 	    {
1710 		list_append_tv(l, &item->li_tv);
1711 		item = item->li_next;
1712 	    }
1713 
1714 	    ltv.v_type = VAR_LIST;
1715 	    ltv.v_lock = 0;
1716 	    ltv.vval.v_list = l;
1717 	    l->lv_refcount = 1;
1718 
1719 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1720 						    (char_u *)"]", nextchars);
1721 	    clear_tv(&ltv);
1722 	    if (arg == NULL)
1723 		return FAIL;
1724 	    break;
1725 	}
1726 	else if (*arg != ',' && *arg != ']')
1727 	{
1728 	    EMSG2(_(e_intern2), "ex_let_vars()");
1729 	    return FAIL;
1730 	}
1731     }
1732 
1733     return OK;
1734 }
1735 
1736 /*
1737  * Skip over assignable variable "var" or list of variables "[var, var]".
1738  * Used for ":let varvar = expr" and ":for varvar in expr".
1739  * For "[var, var]" increment "*var_count" for each variable.
1740  * for "[var, var; var]" set "semicolon".
1741  * Return NULL for an error.
1742  */
1743     static char_u *
1744 skip_var_list(arg, var_count, semicolon)
1745     char_u	*arg;
1746     int		*var_count;
1747     int		*semicolon;
1748 {
1749     char_u	*p, *s;
1750 
1751     if (*arg == '[')
1752     {
1753 	/* "[var, var]": find the matching ']'. */
1754 	p = arg;
1755 	for (;;)
1756 	{
1757 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1758 	    s = skip_var_one(p);
1759 	    if (s == p)
1760 	    {
1761 		EMSG2(_(e_invarg2), p);
1762 		return NULL;
1763 	    }
1764 	    ++*var_count;
1765 
1766 	    p = skipwhite(s);
1767 	    if (*p == ']')
1768 		break;
1769 	    else if (*p == ';')
1770 	    {
1771 		if (*semicolon == 1)
1772 		{
1773 		    EMSG(_("Double ; in list of variables"));
1774 		    return NULL;
1775 		}
1776 		*semicolon = 1;
1777 	    }
1778 	    else if (*p != ',')
1779 	    {
1780 		EMSG2(_(e_invarg2), p);
1781 		return NULL;
1782 	    }
1783 	}
1784 	return p + 1;
1785     }
1786     else
1787 	return skip_var_one(arg);
1788 }
1789 
1790 /*
1791  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1792  * l[idx].
1793  */
1794     static char_u *
1795 skip_var_one(arg)
1796     char_u	*arg;
1797 {
1798     if (*arg == '@' && arg[1] != NUL)
1799 	return arg + 2;
1800     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1801 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1802 }
1803 
1804 /*
1805  * List variables for hashtab "ht" with prefix "prefix".
1806  * If "empty" is TRUE also list NULL strings as empty strings.
1807  */
1808     static void
1809 list_hashtable_vars(ht, prefix, empty)
1810     hashtab_T	*ht;
1811     char_u	*prefix;
1812     int		empty;
1813 {
1814     hashitem_T	*hi;
1815     dictitem_T	*di;
1816     int		todo;
1817 
1818     todo = ht->ht_used;
1819     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1820     {
1821 	if (!HASHITEM_EMPTY(hi))
1822 	{
1823 	    --todo;
1824 	    di = HI2DI(hi);
1825 	    if (empty || di->di_tv.v_type != VAR_STRING
1826 					   || di->di_tv.vval.v_string != NULL)
1827 		list_one_var(di, prefix);
1828 	}
1829     }
1830 }
1831 
1832 /*
1833  * List global variables.
1834  */
1835     static void
1836 list_glob_vars()
1837 {
1838     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1839 }
1840 
1841 /*
1842  * List buffer variables.
1843  */
1844     static void
1845 list_buf_vars()
1846 {
1847     char_u	numbuf[NUMBUFLEN];
1848 
1849     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1850 
1851     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1852     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1853 }
1854 
1855 /*
1856  * List window variables.
1857  */
1858     static void
1859 list_win_vars()
1860 {
1861     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1862 }
1863 
1864 /*
1865  * List Vim variables.
1866  */
1867     static void
1868 list_vim_vars()
1869 {
1870     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1871 }
1872 
1873 /*
1874  * List variables in "arg".
1875  */
1876     static char_u *
1877 list_arg_vars(eap, arg)
1878     exarg_T	*eap;
1879     char_u	*arg;
1880 {
1881     int		error = FALSE;
1882     int		len;
1883     char_u	*name;
1884     char_u	*name_start;
1885     char_u	*arg_subsc;
1886     char_u	*tofree;
1887     typval_T    tv;
1888 
1889     while (!ends_excmd(*arg) && !got_int)
1890     {
1891 	if (error || eap->skip)
1892 	{
1893 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1894 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1895 	    {
1896 		emsg_severe = TRUE;
1897 		EMSG(_(e_trailing));
1898 		break;
1899 	    }
1900 	}
1901 	else
1902 	{
1903 	    /* get_name_len() takes care of expanding curly braces */
1904 	    name_start = name = arg;
1905 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1906 	    if (len <= 0)
1907 	    {
1908 		/* This is mainly to keep test 49 working: when expanding
1909 		 * curly braces fails overrule the exception error message. */
1910 		if (len < 0 && !aborting())
1911 		{
1912 		    emsg_severe = TRUE;
1913 		    EMSG2(_(e_invarg2), arg);
1914 		    break;
1915 		}
1916 		error = TRUE;
1917 	    }
1918 	    else
1919 	    {
1920 		if (tofree != NULL)
1921 		    name = tofree;
1922 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1923 		    error = TRUE;
1924 		else
1925 		{
1926 		    /* handle d.key, l[idx], f(expr) */
1927 		    arg_subsc = arg;
1928 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
1929 			error = TRUE;
1930 		    else
1931 		    {
1932 			if (arg == arg_subsc && len == 2 && name[1] == ':')
1933 			{
1934 			    switch (*name)
1935 			    {
1936 				case 'g': list_glob_vars(); break;
1937 				case 'b': list_buf_vars(); break;
1938 				case 'w': list_win_vars(); break;
1939 				case 'v': list_vim_vars(); break;
1940 				default:
1941 					  EMSG2(_("E738: Can't list variables for %s"), name);
1942 			    }
1943 			}
1944 			else
1945 			{
1946 			    char_u	numbuf[NUMBUFLEN];
1947 			    char_u	*tf;
1948 			    int		c;
1949 			    char_u	*s;
1950 
1951 			    s = echo_string(&tv, &tf, numbuf);
1952 			    c = *arg;
1953 			    *arg = NUL;
1954 			    list_one_var_a((char_u *)"",
1955 				    arg == arg_subsc ? name : name_start,
1956 				    tv.v_type, s == NULL ? (char_u *)"" : s);
1957 			    *arg = c;
1958 			    vim_free(tf);
1959 			}
1960 			clear_tv(&tv);
1961 		    }
1962 		}
1963 	    }
1964 
1965 	    vim_free(tofree);
1966 	}
1967 
1968 	arg = skipwhite(arg);
1969     }
1970 
1971     return arg;
1972 }
1973 
1974 /*
1975  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
1976  * Returns a pointer to the char just after the var name.
1977  * Returns NULL if there is an error.
1978  */
1979     static char_u *
1980 ex_let_one(arg, tv, copy, endchars, op)
1981     char_u	*arg;		/* points to variable name */
1982     typval_T	*tv;		/* value to assign to variable */
1983     int		copy;		/* copy value from "tv" */
1984     char_u	*endchars;	/* valid chars after variable name  or NULL */
1985     char_u	*op;		/* "+", "-", "."  or NULL*/
1986 {
1987     int		c1;
1988     char_u	*name;
1989     char_u	*p;
1990     char_u	*arg_end = NULL;
1991     int		len;
1992     int		opt_flags;
1993     char_u	*tofree = NULL;
1994 
1995     /*
1996      * ":let $VAR = expr": Set environment variable.
1997      */
1998     if (*arg == '$')
1999     {
2000 	/* Find the end of the name. */
2001 	++arg;
2002 	name = arg;
2003 	len = get_env_len(&arg);
2004 	if (len == 0)
2005 	    EMSG2(_(e_invarg2), name - 1);
2006 	else
2007 	{
2008 	    if (op != NULL && (*op == '+' || *op == '-'))
2009 		EMSG2(_(e_letwrong), op);
2010 	    else if (endchars != NULL
2011 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2012 		EMSG(_(e_letunexp));
2013 	    else
2014 	    {
2015 		c1 = name[len];
2016 		name[len] = NUL;
2017 		p = get_tv_string_chk(tv);
2018 		if (p != NULL && op != NULL && *op == '.')
2019 		{
2020 		    int	    mustfree = FALSE;
2021 		    char_u  *s = vim_getenv(name, &mustfree);
2022 
2023 		    if (s != NULL)
2024 		    {
2025 			p = tofree = concat_str(s, p);
2026 			if (mustfree)
2027 			    vim_free(s);
2028 		    }
2029 		}
2030 		if (p != NULL)
2031 		{
2032 		    vim_setenv(name, p);
2033 		    if (STRICMP(name, "HOME") == 0)
2034 			init_homedir();
2035 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2036 			didset_vim = FALSE;
2037 		    else if (didset_vimruntime
2038 					&& STRICMP(name, "VIMRUNTIME") == 0)
2039 			didset_vimruntime = FALSE;
2040 		    arg_end = arg;
2041 		}
2042 		name[len] = c1;
2043 		vim_free(tofree);
2044 	    }
2045 	}
2046     }
2047 
2048     /*
2049      * ":let &option = expr": Set option value.
2050      * ":let &l:option = expr": Set local option value.
2051      * ":let &g:option = expr": Set global option value.
2052      */
2053     else if (*arg == '&')
2054     {
2055 	/* Find the end of the name. */
2056 	p = find_option_end(&arg, &opt_flags);
2057 	if (p == NULL || (endchars != NULL
2058 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2059 	    EMSG(_(e_letunexp));
2060 	else
2061 	{
2062 	    long	n;
2063 	    int		opt_type;
2064 	    long	numval;
2065 	    char_u	*stringval = NULL;
2066 	    char_u	*s;
2067 
2068 	    c1 = *p;
2069 	    *p = NUL;
2070 
2071 	    n = get_tv_number(tv);
2072 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2073 	    if (s != NULL && op != NULL && *op != '=')
2074 	    {
2075 		opt_type = get_option_value(arg, &numval,
2076 						       &stringval, opt_flags);
2077 		if ((opt_type == 1 && *op == '.')
2078 			|| (opt_type == 0 && *op != '.'))
2079 		    EMSG2(_(e_letwrong), op);
2080 		else
2081 		{
2082 		    if (opt_type == 1)  /* number */
2083 		    {
2084 			if (*op == '+')
2085 			    n = numval + n;
2086 			else
2087 			    n = numval - n;
2088 		    }
2089 		    else if (opt_type == 0 && stringval != NULL) /* string */
2090 		    {
2091 			s = concat_str(stringval, s);
2092 			vim_free(stringval);
2093 			stringval = s;
2094 		    }
2095 		}
2096 	    }
2097 	    if (s != NULL)
2098 	    {
2099 		set_option_value(arg, n, s, opt_flags);
2100 		arg_end = p;
2101 	    }
2102 	    *p = c1;
2103 	    vim_free(stringval);
2104 	}
2105     }
2106 
2107     /*
2108      * ":let @r = expr": Set register contents.
2109      */
2110     else if (*arg == '@')
2111     {
2112 	++arg;
2113 	if (op != NULL && (*op == '+' || *op == '-'))
2114 	    EMSG2(_(e_letwrong), op);
2115 	else if (endchars != NULL
2116 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2117 	    EMSG(_(e_letunexp));
2118 	else
2119 	{
2120 	    char_u	*tofree = NULL;
2121 	    char_u	*s;
2122 
2123 	    p = get_tv_string_chk(tv);
2124 	    if (p != NULL && op != NULL && *op == '.')
2125 	    {
2126 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2127 		if (s != NULL)
2128 		{
2129 		    p = tofree = concat_str(s, p);
2130 		    vim_free(s);
2131 		}
2132 	    }
2133 	    if (p != NULL)
2134 	    {
2135 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2136 		arg_end = arg + 1;
2137 	    }
2138 	    vim_free(tofree);
2139 	}
2140     }
2141 
2142     /*
2143      * ":let var = expr": Set internal variable.
2144      * ":let {expr} = expr": Idem, name made with curly braces
2145      */
2146     else if (eval_isnamec1(*arg) || *arg == '{')
2147     {
2148 	lval_T	lv;
2149 
2150 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2151 	if (p != NULL && lv.ll_name != NULL)
2152 	{
2153 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2154 		EMSG(_(e_letunexp));
2155 	    else
2156 	    {
2157 		set_var_lval(&lv, p, tv, copy, op);
2158 		arg_end = p;
2159 	    }
2160 	}
2161 	clear_lval(&lv);
2162     }
2163 
2164     else
2165 	EMSG2(_(e_invarg2), arg);
2166 
2167     return arg_end;
2168 }
2169 
2170 /*
2171  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2172  */
2173     static int
2174 check_changedtick(arg)
2175     char_u	*arg;
2176 {
2177     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2178     {
2179 	EMSG2(_(e_readonlyvar), arg);
2180 	return TRUE;
2181     }
2182     return FALSE;
2183 }
2184 
2185 /*
2186  * Get an lval: variable, Dict item or List item that can be assigned a value
2187  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2188  * "name.key", "name.key[expr]" etc.
2189  * Indexing only works if "name" is an existing List or Dictionary.
2190  * "name" points to the start of the name.
2191  * If "rettv" is not NULL it points to the value to be assigned.
2192  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2193  * wrong; must end in space or cmd separator.
2194  *
2195  * Returns a pointer to just after the name, including indexes.
2196  * When an evaluation error occurs "lp->ll_name" is NULL;
2197  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2198  */
2199     static char_u *
2200 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2201     char_u	*name;
2202     typval_T	*rettv;
2203     lval_T	*lp;
2204     int		unlet;
2205     int		skip;
2206     int		quiet;	    /* don't give error messages */
2207     int		fne_flags;  /* flags for find_name_end() */
2208 {
2209     char_u	*p;
2210     char_u	*expr_start, *expr_end;
2211     int		cc;
2212     dictitem_T	*v;
2213     typval_T	var1;
2214     typval_T	var2;
2215     int		empty1 = FALSE;
2216     listitem_T	*ni;
2217     char_u	*key = NULL;
2218     int		len;
2219     hashtab_T	*ht;
2220 
2221     /* Clear everything in "lp". */
2222     vim_memset(lp, 0, sizeof(lval_T));
2223 
2224     if (skip)
2225     {
2226 	/* When skipping just find the end of the name. */
2227 	lp->ll_name = name;
2228 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2229     }
2230 
2231     /* Find the end of the name. */
2232     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2233     if (expr_start != NULL)
2234     {
2235 	/* Don't expand the name when we already know there is an error. */
2236 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2237 						    && *p != '[' && *p != '.')
2238 	{
2239 	    EMSG(_(e_trailing));
2240 	    return NULL;
2241 	}
2242 
2243 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2244 	if (lp->ll_exp_name == NULL)
2245 	{
2246 	    /* Report an invalid expression in braces, unless the
2247 	     * expression evaluation has been cancelled due to an
2248 	     * aborting error, an interrupt, or an exception. */
2249 	    if (!aborting() && !quiet)
2250 	    {
2251 		emsg_severe = TRUE;
2252 		EMSG2(_(e_invarg2), name);
2253 		return NULL;
2254 	    }
2255 	}
2256 	lp->ll_name = lp->ll_exp_name;
2257     }
2258     else
2259 	lp->ll_name = name;
2260 
2261     /* Without [idx] or .key we are done. */
2262     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2263 	return p;
2264 
2265     cc = *p;
2266     *p = NUL;
2267     v = find_var(lp->ll_name, &ht);
2268     if (v == NULL && !quiet)
2269 	EMSG2(_(e_undefvar), lp->ll_name);
2270     *p = cc;
2271     if (v == NULL)
2272 	return NULL;
2273 
2274     /*
2275      * Loop until no more [idx] or .key is following.
2276      */
2277     lp->ll_tv = &v->di_tv;
2278     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2279     {
2280 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2281 		&& !(lp->ll_tv->v_type == VAR_DICT
2282 					   && lp->ll_tv->vval.v_dict != NULL))
2283 	{
2284 	    if (!quiet)
2285 		EMSG(_("E689: Can only index a List or Dictionary"));
2286 	    return NULL;
2287 	}
2288 	if (lp->ll_range)
2289 	{
2290 	    if (!quiet)
2291 		EMSG(_("E708: [:] must come last"));
2292 	    return NULL;
2293 	}
2294 
2295 	len = -1;
2296 	if (*p == '.')
2297 	{
2298 	    key = p + 1;
2299 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2300 		;
2301 	    if (len == 0)
2302 	    {
2303 		if (!quiet)
2304 		    EMSG(_(e_emptykey));
2305 		return NULL;
2306 	    }
2307 	    p = key + len;
2308 	}
2309 	else
2310 	{
2311 	    /* Get the index [expr] or the first index [expr: ]. */
2312 	    p = skipwhite(p + 1);
2313 	    if (*p == ':')
2314 		empty1 = TRUE;
2315 	    else
2316 	    {
2317 		empty1 = FALSE;
2318 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2319 		    return NULL;
2320 		if (get_tv_string_chk(&var1) == NULL)
2321 		{
2322 		    /* not a number or string */
2323 		    clear_tv(&var1);
2324 		    return NULL;
2325 		}
2326 	    }
2327 
2328 	    /* Optionally get the second index [ :expr]. */
2329 	    if (*p == ':')
2330 	    {
2331 		if (lp->ll_tv->v_type == VAR_DICT)
2332 		{
2333 		    if (!quiet)
2334 			EMSG(_(e_dictrange));
2335 		    if (!empty1)
2336 			clear_tv(&var1);
2337 		    return NULL;
2338 		}
2339 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2340 					       || rettv->vval.v_list == NULL))
2341 		{
2342 		    if (!quiet)
2343 			EMSG(_("E709: [:] requires a List value"));
2344 		    if (!empty1)
2345 			clear_tv(&var1);
2346 		    return NULL;
2347 		}
2348 		p = skipwhite(p + 1);
2349 		if (*p == ']')
2350 		    lp->ll_empty2 = TRUE;
2351 		else
2352 		{
2353 		    lp->ll_empty2 = FALSE;
2354 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2355 		    {
2356 			if (!empty1)
2357 			    clear_tv(&var1);
2358 			return NULL;
2359 		    }
2360 		    if (get_tv_string_chk(&var2) == NULL)
2361 		    {
2362 			/* not a number or string */
2363 			if (!empty1)
2364 			    clear_tv(&var1);
2365 			clear_tv(&var2);
2366 			return NULL;
2367 		    }
2368 		}
2369 		lp->ll_range = TRUE;
2370 	    }
2371 	    else
2372 		lp->ll_range = FALSE;
2373 
2374 	    if (*p != ']')
2375 	    {
2376 		if (!quiet)
2377 		    EMSG(_(e_missbrac));
2378 		if (!empty1)
2379 		    clear_tv(&var1);
2380 		if (lp->ll_range && !lp->ll_empty2)
2381 		    clear_tv(&var2);
2382 		return NULL;
2383 	    }
2384 
2385 	    /* Skip to past ']'. */
2386 	    ++p;
2387 	}
2388 
2389 	if (lp->ll_tv->v_type == VAR_DICT)
2390 	{
2391 	    if (len == -1)
2392 	    {
2393 		/* "[key]": get key from "var1" */
2394 		key = get_tv_string(&var1);	/* is number or string */
2395 		if (*key == NUL)
2396 		{
2397 		    if (!quiet)
2398 			EMSG(_(e_emptykey));
2399 		    clear_tv(&var1);
2400 		    return NULL;
2401 		}
2402 	    }
2403 	    lp->ll_list = NULL;
2404 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2405 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2406 	    if (lp->ll_di == NULL)
2407 	    {
2408 		/* Key does not exist in dict: may need to add it. */
2409 		if (*p == '[' || *p == '.' || unlet)
2410 		{
2411 		    if (!quiet)
2412 			EMSG2(_(e_dictkey), key);
2413 		    if (len == -1)
2414 			clear_tv(&var1);
2415 		    return NULL;
2416 		}
2417 		if (len == -1)
2418 		    lp->ll_newkey = vim_strsave(key);
2419 		else
2420 		    lp->ll_newkey = vim_strnsave(key, len);
2421 		if (len == -1)
2422 		    clear_tv(&var1);
2423 		if (lp->ll_newkey == NULL)
2424 		    p = NULL;
2425 		break;
2426 	    }
2427 	    if (len == -1)
2428 		clear_tv(&var1);
2429 	    lp->ll_tv = &lp->ll_di->di_tv;
2430 	}
2431 	else
2432 	{
2433 	    /*
2434 	     * Get the number and item for the only or first index of the List.
2435 	     */
2436 	    if (empty1)
2437 		lp->ll_n1 = 0;
2438 	    else
2439 	    {
2440 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2441 		clear_tv(&var1);
2442 	    }
2443 	    lp->ll_dict = NULL;
2444 	    lp->ll_list = lp->ll_tv->vval.v_list;
2445 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2446 	    if (lp->ll_li == NULL)
2447 	    {
2448 		if (!quiet)
2449 		    EMSGN(_(e_listidx), lp->ll_n1);
2450 		if (lp->ll_range && !lp->ll_empty2)
2451 		    clear_tv(&var2);
2452 		return NULL;
2453 	    }
2454 
2455 	    /*
2456 	     * May need to find the item or absolute index for the second
2457 	     * index of a range.
2458 	     * When no index given: "lp->ll_empty2" is TRUE.
2459 	     * Otherwise "lp->ll_n2" is set to the second index.
2460 	     */
2461 	    if (lp->ll_range && !lp->ll_empty2)
2462 	    {
2463 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2464 		clear_tv(&var2);
2465 		if (lp->ll_n2 < 0)
2466 		{
2467 		    ni = list_find(lp->ll_list, lp->ll_n2);
2468 		    if (ni == NULL)
2469 		    {
2470 			if (!quiet)
2471 			    EMSGN(_(e_listidx), lp->ll_n2);
2472 			return NULL;
2473 		    }
2474 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2475 		}
2476 
2477 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2478 		if (lp->ll_n1 < 0)
2479 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2480 		if (lp->ll_n2 < lp->ll_n1)
2481 		{
2482 		    if (!quiet)
2483 			EMSGN(_(e_listidx), lp->ll_n2);
2484 		    return NULL;
2485 		}
2486 	    }
2487 
2488 	    lp->ll_tv = &lp->ll_li->li_tv;
2489 	}
2490     }
2491 
2492     return p;
2493 }
2494 
2495 /*
2496  * Clear lval "lp" that was filled by get_lval().
2497  */
2498     static void
2499 clear_lval(lp)
2500     lval_T	*lp;
2501 {
2502     vim_free(lp->ll_exp_name);
2503     vim_free(lp->ll_newkey);
2504 }
2505 
2506 /*
2507  * Set a variable that was parsed by get_lval() to "rettv".
2508  * "endp" points to just after the parsed name.
2509  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2510  */
2511     static void
2512 set_var_lval(lp, endp, rettv, copy, op)
2513     lval_T	*lp;
2514     char_u	*endp;
2515     typval_T	*rettv;
2516     int		copy;
2517     char_u	*op;
2518 {
2519     int		cc;
2520     listitem_T	*ni;
2521     listitem_T	*ri;
2522     dictitem_T	*di;
2523 
2524     if (lp->ll_tv == NULL)
2525     {
2526 	if (!check_changedtick(lp->ll_name))
2527 	{
2528 	    cc = *endp;
2529 	    *endp = NUL;
2530 	    if (op != NULL && *op != '=')
2531 	    {
2532 		typval_T tv;
2533 
2534 		/* handle +=, -= and .= */
2535 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2536 							     &tv, TRUE) == OK)
2537 		{
2538 		    if (tv_op(&tv, rettv, op) == OK)
2539 			set_var(lp->ll_name, &tv, FALSE);
2540 		    clear_tv(&tv);
2541 		}
2542 	    }
2543 	    else
2544 		set_var(lp->ll_name, rettv, copy);
2545 	    *endp = cc;
2546 	}
2547     }
2548     else if (tv_check_lock(lp->ll_newkey == NULL
2549 		? lp->ll_tv->v_lock
2550 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2551 	;
2552     else if (lp->ll_range)
2553     {
2554 	/*
2555 	 * Assign the List values to the list items.
2556 	 */
2557 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2558 	{
2559 	    if (op != NULL && *op != '=')
2560 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2561 	    else
2562 	    {
2563 		clear_tv(&lp->ll_li->li_tv);
2564 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2565 	    }
2566 	    ri = ri->li_next;
2567 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2568 		break;
2569 	    if (lp->ll_li->li_next == NULL)
2570 	    {
2571 		/* Need to add an empty item. */
2572 		ni = listitem_alloc();
2573 		if (ni == NULL)
2574 		{
2575 		    ri = NULL;
2576 		    break;
2577 		}
2578 		ni->li_tv.v_type = VAR_NUMBER;
2579 		ni->li_tv.v_lock = 0;
2580 		ni->li_tv.vval.v_number = 0;
2581 		list_append(lp->ll_list, ni);
2582 	    }
2583 	    lp->ll_li = lp->ll_li->li_next;
2584 	    ++lp->ll_n1;
2585 	}
2586 	if (ri != NULL)
2587 	    EMSG(_("E710: List value has more items than target"));
2588 	else if (lp->ll_empty2
2589 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2590 		: lp->ll_n1 != lp->ll_n2)
2591 	    EMSG(_("E711: List value has not enough items"));
2592     }
2593     else
2594     {
2595 	/*
2596 	 * Assign to a List or Dictionary item.
2597 	 */
2598 	if (lp->ll_newkey != NULL)
2599 	{
2600 	    if (op != NULL && *op != '=')
2601 	    {
2602 		EMSG2(_(e_letwrong), op);
2603 		return;
2604 	    }
2605 
2606 	    /* Need to add an item to the Dictionary. */
2607 	    di = dictitem_alloc(lp->ll_newkey);
2608 	    if (di == NULL)
2609 		return;
2610 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2611 	    {
2612 		vim_free(di);
2613 		return;
2614 	    }
2615 	    lp->ll_tv = &di->di_tv;
2616 	}
2617 	else if (op != NULL && *op != '=')
2618 	{
2619 	    tv_op(lp->ll_tv, rettv, op);
2620 	    return;
2621 	}
2622 	else
2623 	    clear_tv(lp->ll_tv);
2624 
2625 	/*
2626 	 * Assign the value to the variable or list item.
2627 	 */
2628 	if (copy)
2629 	    copy_tv(rettv, lp->ll_tv);
2630 	else
2631 	{
2632 	    *lp->ll_tv = *rettv;
2633 	    lp->ll_tv->v_lock = 0;
2634 	    init_tv(rettv);
2635 	}
2636     }
2637 }
2638 
2639 /*
2640  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2641  * Returns OK or FAIL.
2642  */
2643     static int
2644 tv_op(tv1, tv2, op)
2645     typval_T *tv1;
2646     typval_T *tv2;
2647     char_u  *op;
2648 {
2649     long	n;
2650     char_u	numbuf[NUMBUFLEN];
2651     char_u	*s;
2652 
2653     /* Can't do anything with a Funcref or a Dict on the right. */
2654     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2655     {
2656 	switch (tv1->v_type)
2657 	{
2658 	    case VAR_DICT:
2659 	    case VAR_FUNC:
2660 		break;
2661 
2662 	    case VAR_LIST:
2663 		if (*op != '+' || tv2->v_type != VAR_LIST)
2664 		    break;
2665 		/* List += List */
2666 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2667 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2668 		return OK;
2669 
2670 	    case VAR_NUMBER:
2671 	    case VAR_STRING:
2672 		if (tv2->v_type == VAR_LIST)
2673 		    break;
2674 		if (*op == '+' || *op == '-')
2675 		{
2676 		    /* nr += nr  or  nr -= nr*/
2677 		    n = get_tv_number(tv1);
2678 		    if (*op == '+')
2679 			n += get_tv_number(tv2);
2680 		    else
2681 			n -= get_tv_number(tv2);
2682 		    clear_tv(tv1);
2683 		    tv1->v_type = VAR_NUMBER;
2684 		    tv1->vval.v_number = n;
2685 		}
2686 		else
2687 		{
2688 		    /* str .= str */
2689 		    s = get_tv_string(tv1);
2690 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2691 		    clear_tv(tv1);
2692 		    tv1->v_type = VAR_STRING;
2693 		    tv1->vval.v_string = s;
2694 		}
2695 		return OK;
2696 	}
2697     }
2698 
2699     EMSG2(_(e_letwrong), op);
2700     return FAIL;
2701 }
2702 
2703 /*
2704  * Add a watcher to a list.
2705  */
2706     static void
2707 list_add_watch(l, lw)
2708     list_T	*l;
2709     listwatch_T	*lw;
2710 {
2711     lw->lw_next = l->lv_watch;
2712     l->lv_watch = lw;
2713 }
2714 
2715 /*
2716  * Remove a watcher from a list.
2717  * No warning when it isn't found...
2718  */
2719     static void
2720 list_rem_watch(l, lwrem)
2721     list_T	*l;
2722     listwatch_T	*lwrem;
2723 {
2724     listwatch_T	*lw, **lwp;
2725 
2726     lwp = &l->lv_watch;
2727     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2728     {
2729 	if (lw == lwrem)
2730 	{
2731 	    *lwp = lw->lw_next;
2732 	    break;
2733 	}
2734 	lwp = &lw->lw_next;
2735     }
2736 }
2737 
2738 /*
2739  * Just before removing an item from a list: advance watchers to the next
2740  * item.
2741  */
2742     static void
2743 list_fix_watch(l, item)
2744     list_T	*l;
2745     listitem_T	*item;
2746 {
2747     listwatch_T	*lw;
2748 
2749     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2750 	if (lw->lw_item == item)
2751 	    lw->lw_item = item->li_next;
2752 }
2753 
2754 /*
2755  * Evaluate the expression used in a ":for var in expr" command.
2756  * "arg" points to "var".
2757  * Set "*errp" to TRUE for an error, FALSE otherwise;
2758  * Return a pointer that holds the info.  Null when there is an error.
2759  */
2760     void *
2761 eval_for_line(arg, errp, nextcmdp, skip)
2762     char_u	*arg;
2763     int		*errp;
2764     char_u	**nextcmdp;
2765     int		skip;
2766 {
2767     forinfo_T	*fi;
2768     char_u	*expr;
2769     typval_T	tv;
2770     list_T	*l;
2771 
2772     *errp = TRUE;	/* default: there is an error */
2773 
2774     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2775     if (fi == NULL)
2776 	return NULL;
2777 
2778     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2779     if (expr == NULL)
2780 	return fi;
2781 
2782     expr = skipwhite(expr);
2783     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2784     {
2785 	EMSG(_("E690: Missing \"in\" after :for"));
2786 	return fi;
2787     }
2788 
2789     if (skip)
2790 	++emsg_skip;
2791     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2792     {
2793 	*errp = FALSE;
2794 	if (!skip)
2795 	{
2796 	    l = tv.vval.v_list;
2797 	    if (tv.v_type != VAR_LIST || l == NULL)
2798 	    {
2799 		EMSG(_(e_listreq));
2800 		clear_tv(&tv);
2801 	    }
2802 	    else
2803 	    {
2804 		fi->fi_list = l;
2805 		list_add_watch(l, &fi->fi_lw);
2806 		fi->fi_lw.lw_item = l->lv_first;
2807 	    }
2808 	}
2809     }
2810     if (skip)
2811 	--emsg_skip;
2812 
2813     return fi;
2814 }
2815 
2816 /*
2817  * Use the first item in a ":for" list.  Advance to the next.
2818  * Assign the values to the variable (list).  "arg" points to the first one.
2819  * Return TRUE when a valid item was found, FALSE when at end of list or
2820  * something wrong.
2821  */
2822     int
2823 next_for_item(fi_void, arg)
2824     void	*fi_void;
2825     char_u	*arg;
2826 {
2827     forinfo_T    *fi = (forinfo_T *)fi_void;
2828     int		result;
2829     listitem_T	*item;
2830 
2831     item = fi->fi_lw.lw_item;
2832     if (item == NULL)
2833 	result = FALSE;
2834     else
2835     {
2836 	fi->fi_lw.lw_item = item->li_next;
2837 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2838 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2839     }
2840     return result;
2841 }
2842 
2843 /*
2844  * Free the structure used to store info used by ":for".
2845  */
2846     void
2847 free_for_info(fi_void)
2848     void *fi_void;
2849 {
2850     forinfo_T    *fi = (forinfo_T *)fi_void;
2851 
2852     if (fi != NULL && fi->fi_list != NULL)
2853     {
2854 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2855 	list_unref(fi->fi_list);
2856     }
2857     vim_free(fi);
2858 }
2859 
2860 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2861 
2862     void
2863 set_context_for_expression(xp, arg, cmdidx)
2864     expand_T	*xp;
2865     char_u	*arg;
2866     cmdidx_T	cmdidx;
2867 {
2868     int		got_eq = FALSE;
2869     int		c;
2870     char_u	*p;
2871 
2872     if (cmdidx == CMD_let)
2873     {
2874 	xp->xp_context = EXPAND_USER_VARS;
2875 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2876 	{
2877 	    /* ":let var1 var2 ...": find last space. */
2878 	    for (p = arg + STRLEN(arg); p >= arg; )
2879 	    {
2880 		xp->xp_pattern = p;
2881 		mb_ptr_back(arg, p);
2882 		if (vim_iswhite(*p))
2883 		    break;
2884 	    }
2885 	    return;
2886 	}
2887     }
2888     else
2889 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2890 							  : EXPAND_EXPRESSION;
2891     while ((xp->xp_pattern = vim_strpbrk(arg,
2892 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2893     {
2894 	c = *xp->xp_pattern;
2895 	if (c == '&')
2896 	{
2897 	    c = xp->xp_pattern[1];
2898 	    if (c == '&')
2899 	    {
2900 		++xp->xp_pattern;
2901 		xp->xp_context = cmdidx != CMD_let || got_eq
2902 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2903 	    }
2904 	    else if (c != ' ')
2905 	    {
2906 		xp->xp_context = EXPAND_SETTINGS;
2907 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2908 		    xp->xp_pattern += 2;
2909 
2910 	    }
2911 	}
2912 	else if (c == '$')
2913 	{
2914 	    /* environment variable */
2915 	    xp->xp_context = EXPAND_ENV_VARS;
2916 	}
2917 	else if (c == '=')
2918 	{
2919 	    got_eq = TRUE;
2920 	    xp->xp_context = EXPAND_EXPRESSION;
2921 	}
2922 	else if (c == '<'
2923 		&& xp->xp_context == EXPAND_FUNCTIONS
2924 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2925 	{
2926 	    /* Function name can start with "<SNR>" */
2927 	    break;
2928 	}
2929 	else if (cmdidx != CMD_let || got_eq)
2930 	{
2931 	    if (c == '"')	    /* string */
2932 	    {
2933 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
2934 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
2935 			++xp->xp_pattern;
2936 		xp->xp_context = EXPAND_NOTHING;
2937 	    }
2938 	    else if (c == '\'')	    /* literal string */
2939 	    {
2940 		/* Trick: '' is like stopping and starting a literal string. */
2941 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
2942 		    /* skip */ ;
2943 		xp->xp_context = EXPAND_NOTHING;
2944 	    }
2945 	    else if (c == '|')
2946 	    {
2947 		if (xp->xp_pattern[1] == '|')
2948 		{
2949 		    ++xp->xp_pattern;
2950 		    xp->xp_context = EXPAND_EXPRESSION;
2951 		}
2952 		else
2953 		    xp->xp_context = EXPAND_COMMANDS;
2954 	    }
2955 	    else
2956 		xp->xp_context = EXPAND_EXPRESSION;
2957 	}
2958 	else
2959 	    /* Doesn't look like something valid, expand as an expression
2960 	     * anyway. */
2961 	    xp->xp_context = EXPAND_EXPRESSION;
2962 	arg = xp->xp_pattern;
2963 	if (*arg != NUL)
2964 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
2965 		/* skip */ ;
2966     }
2967     xp->xp_pattern = arg;
2968 }
2969 
2970 #endif /* FEAT_CMDL_COMPL */
2971 
2972 /*
2973  * ":1,25call func(arg1, arg2)"	function call.
2974  */
2975     void
2976 ex_call(eap)
2977     exarg_T	*eap;
2978 {
2979     char_u	*arg = eap->arg;
2980     char_u	*startarg;
2981     char_u	*name;
2982     char_u	*tofree;
2983     int		len;
2984     typval_T	rettv;
2985     linenr_T	lnum;
2986     int		doesrange;
2987     int		failed = FALSE;
2988     funcdict_T	fudi;
2989 
2990     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
2991     vim_free(fudi.fd_newkey);
2992     if (tofree == NULL)
2993 	return;
2994 
2995     /* Increase refcount on dictionary, it could get deleted when evaluating
2996      * the arguments. */
2997     if (fudi.fd_dict != NULL)
2998 	++fudi.fd_dict->dv_refcount;
2999 
3000     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3001     len = STRLEN(tofree);
3002     name = deref_func_name(tofree, &len);
3003 
3004     /* Skip white space to allow ":call func ()".  Not good, but required for
3005      * backward compatibility. */
3006     startarg = skipwhite(arg);
3007     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3008 
3009     if (*startarg != '(')
3010     {
3011 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3012 	goto end;
3013     }
3014 
3015     /*
3016      * When skipping, evaluate the function once, to find the end of the
3017      * arguments.
3018      * When the function takes a range, this is discovered after the first
3019      * call, and the loop is broken.
3020      */
3021     if (eap->skip)
3022     {
3023 	++emsg_skip;
3024 	lnum = eap->line2;	/* do it once, also with an invalid range */
3025     }
3026     else
3027 	lnum = eap->line1;
3028     for ( ; lnum <= eap->line2; ++lnum)
3029     {
3030 	if (!eap->skip && eap->addr_count > 0)
3031 	{
3032 	    curwin->w_cursor.lnum = lnum;
3033 	    curwin->w_cursor.col = 0;
3034 	}
3035 	arg = startarg;
3036 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3037 		    eap->line1, eap->line2, &doesrange,
3038 					    !eap->skip, fudi.fd_dict) == FAIL)
3039 	{
3040 	    failed = TRUE;
3041 	    break;
3042 	}
3043 	clear_tv(&rettv);
3044 	if (doesrange || eap->skip)
3045 	    break;
3046 	/* Stop when immediately aborting on error, or when an interrupt
3047 	 * occurred or an exception was thrown but not caught.
3048 	 * get_func_tv() returned OK, so that the check for trailing
3049 	 * characters below is executed. */
3050 	if (aborting())
3051 	    break;
3052     }
3053     if (eap->skip)
3054 	--emsg_skip;
3055 
3056     if (!failed)
3057     {
3058 	/* Check for trailing illegal characters and a following command. */
3059 	if (!ends_excmd(*arg))
3060 	{
3061 	    emsg_severe = TRUE;
3062 	    EMSG(_(e_trailing));
3063 	}
3064 	else
3065 	    eap->nextcmd = check_nextcmd(arg);
3066     }
3067 
3068 end:
3069     dict_unref(fudi.fd_dict);
3070     vim_free(tofree);
3071 }
3072 
3073 /*
3074  * ":unlet[!] var1 ... " command.
3075  */
3076     void
3077 ex_unlet(eap)
3078     exarg_T	*eap;
3079 {
3080     ex_unletlock(eap, eap->arg, 0);
3081 }
3082 
3083 /*
3084  * ":lockvar" and ":unlockvar" commands
3085  */
3086     void
3087 ex_lockvar(eap)
3088     exarg_T	*eap;
3089 {
3090     char_u	*arg = eap->arg;
3091     int		deep = 2;
3092 
3093     if (eap->forceit)
3094 	deep = -1;
3095     else if (vim_isdigit(*arg))
3096     {
3097 	deep = getdigits(&arg);
3098 	arg = skipwhite(arg);
3099     }
3100 
3101     ex_unletlock(eap, arg, deep);
3102 }
3103 
3104 /*
3105  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3106  */
3107     static void
3108 ex_unletlock(eap, argstart, deep)
3109     exarg_T	*eap;
3110     char_u	*argstart;
3111     int		deep;
3112 {
3113     char_u	*arg = argstart;
3114     char_u	*name_end;
3115     int		error = FALSE;
3116     lval_T	lv;
3117 
3118     do
3119     {
3120 	/* Parse the name and find the end. */
3121 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3122 							     FNE_CHECK_START);
3123 	if (lv.ll_name == NULL)
3124 	    error = TRUE;	    /* error but continue parsing */
3125 	if (name_end == NULL || (!vim_iswhite(*name_end)
3126 						   && !ends_excmd(*name_end)))
3127 	{
3128 	    if (name_end != NULL)
3129 	    {
3130 		emsg_severe = TRUE;
3131 		EMSG(_(e_trailing));
3132 	    }
3133 	    if (!(eap->skip || error))
3134 		clear_lval(&lv);
3135 	    break;
3136 	}
3137 
3138 	if (!error && !eap->skip)
3139 	{
3140 	    if (eap->cmdidx == CMD_unlet)
3141 	    {
3142 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3143 		    error = TRUE;
3144 	    }
3145 	    else
3146 	    {
3147 		if (do_lock_var(&lv, name_end, deep,
3148 					  eap->cmdidx == CMD_lockvar) == FAIL)
3149 		    error = TRUE;
3150 	    }
3151 	}
3152 
3153 	if (!eap->skip)
3154 	    clear_lval(&lv);
3155 
3156 	arg = skipwhite(name_end);
3157     } while (!ends_excmd(*arg));
3158 
3159     eap->nextcmd = check_nextcmd(arg);
3160 }
3161 
3162     static int
3163 do_unlet_var(lp, name_end, forceit)
3164     lval_T	*lp;
3165     char_u	*name_end;
3166     int		forceit;
3167 {
3168     int		ret = OK;
3169     int		cc;
3170 
3171     if (lp->ll_tv == NULL)
3172     {
3173 	cc = *name_end;
3174 	*name_end = NUL;
3175 
3176 	/* Normal name or expanded name. */
3177 	if (check_changedtick(lp->ll_name))
3178 	    ret = FAIL;
3179 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3180 	    ret = FAIL;
3181 	*name_end = cc;
3182     }
3183     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3184 	return FAIL;
3185     else if (lp->ll_range)
3186     {
3187 	listitem_T    *li;
3188 
3189 	/* Delete a range of List items. */
3190 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3191 	{
3192 	    li = lp->ll_li->li_next;
3193 	    listitem_remove(lp->ll_list, lp->ll_li);
3194 	    lp->ll_li = li;
3195 	    ++lp->ll_n1;
3196 	}
3197     }
3198     else
3199     {
3200 	if (lp->ll_list != NULL)
3201 	    /* unlet a List item. */
3202 	    listitem_remove(lp->ll_list, lp->ll_li);
3203 	else
3204 	    /* unlet a Dictionary item. */
3205 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3206     }
3207 
3208     return ret;
3209 }
3210 
3211 /*
3212  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3213  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3214  */
3215     int
3216 do_unlet(name, forceit)
3217     char_u	*name;
3218     int		forceit;
3219 {
3220     hashtab_T	*ht;
3221     hashitem_T	*hi;
3222     char_u	*varname;
3223 
3224     ht = find_var_ht(name, &varname);
3225     if (ht != NULL && *varname != NUL)
3226     {
3227 	hi = hash_find(ht, varname);
3228 	if (!HASHITEM_EMPTY(hi))
3229 	{
3230 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3231 		return FAIL;
3232 	    delete_var(ht, hi);
3233 	    return OK;
3234 	}
3235     }
3236     if (forceit)
3237 	return OK;
3238     EMSG2(_("E108: No such variable: \"%s\""), name);
3239     return FAIL;
3240 }
3241 
3242 /*
3243  * Lock or unlock variable indicated by "lp".
3244  * "deep" is the levels to go (-1 for unlimited);
3245  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3246  */
3247     static int
3248 do_lock_var(lp, name_end, deep, lock)
3249     lval_T	*lp;
3250     char_u	*name_end;
3251     int		deep;
3252     int		lock;
3253 {
3254     int		ret = OK;
3255     int		cc;
3256     dictitem_T	*di;
3257 
3258     if (deep == 0)	/* nothing to do */
3259 	return OK;
3260 
3261     if (lp->ll_tv == NULL)
3262     {
3263 	cc = *name_end;
3264 	*name_end = NUL;
3265 
3266 	/* Normal name or expanded name. */
3267 	if (check_changedtick(lp->ll_name))
3268 	    ret = FAIL;
3269 	else
3270 	{
3271 	    di = find_var(lp->ll_name, NULL);
3272 	    if (di == NULL)
3273 		ret = FAIL;
3274 	    else
3275 	    {
3276 		if (lock)
3277 		    di->di_flags |= DI_FLAGS_LOCK;
3278 		else
3279 		    di->di_flags &= ~DI_FLAGS_LOCK;
3280 		item_lock(&di->di_tv, deep, lock);
3281 	    }
3282 	}
3283 	*name_end = cc;
3284     }
3285     else if (lp->ll_range)
3286     {
3287 	listitem_T    *li = lp->ll_li;
3288 
3289 	/* (un)lock a range of List items. */
3290 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3291 	{
3292 	    item_lock(&li->li_tv, deep, lock);
3293 	    li = li->li_next;
3294 	    ++lp->ll_n1;
3295 	}
3296     }
3297     else if (lp->ll_list != NULL)
3298 	/* (un)lock a List item. */
3299 	item_lock(&lp->ll_li->li_tv, deep, lock);
3300     else
3301 	/* un(lock) a Dictionary item. */
3302 	item_lock(&lp->ll_di->di_tv, deep, lock);
3303 
3304     return ret;
3305 }
3306 
3307 /*
3308  * Lock or unlock an item.  "deep" is nr of levels to go.
3309  */
3310     static void
3311 item_lock(tv, deep, lock)
3312     typval_T	*tv;
3313     int		deep;
3314     int		lock;
3315 {
3316     static int	recurse = 0;
3317     list_T	*l;
3318     listitem_T	*li;
3319     dict_T	*d;
3320     hashitem_T	*hi;
3321     int		todo;
3322 
3323     if (recurse >= DICT_MAXNEST)
3324     {
3325 	EMSG(_("E743: variable nested too deep for (un)lock"));
3326 	return;
3327     }
3328     if (deep == 0)
3329 	return;
3330     ++recurse;
3331 
3332     /* lock/unlock the item itself */
3333     if (lock)
3334 	tv->v_lock |= VAR_LOCKED;
3335     else
3336 	tv->v_lock &= ~VAR_LOCKED;
3337 
3338     switch (tv->v_type)
3339     {
3340 	case VAR_LIST:
3341 	    if ((l = tv->vval.v_list) != NULL)
3342 	    {
3343 		if (lock)
3344 		    l->lv_lock |= VAR_LOCKED;
3345 		else
3346 		    l->lv_lock &= ~VAR_LOCKED;
3347 		if (deep < 0 || deep > 1)
3348 		    /* recursive: lock/unlock the items the List contains */
3349 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3350 			item_lock(&li->li_tv, deep - 1, lock);
3351 	    }
3352 	    break;
3353 	case VAR_DICT:
3354 	    if ((d = tv->vval.v_dict) != NULL)
3355 	    {
3356 		if (lock)
3357 		    d->dv_lock |= VAR_LOCKED;
3358 		else
3359 		    d->dv_lock &= ~VAR_LOCKED;
3360 		if (deep < 0 || deep > 1)
3361 		{
3362 		    /* recursive: lock/unlock the items the List contains */
3363 		    todo = d->dv_hashtab.ht_used;
3364 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3365 		    {
3366 			if (!HASHITEM_EMPTY(hi))
3367 			{
3368 			    --todo;
3369 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3370 			}
3371 		    }
3372 		}
3373 	    }
3374     }
3375     --recurse;
3376 }
3377 
3378 /*
3379  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3380  * it refers to a List or Dictionary that is locked.
3381  */
3382     static int
3383 tv_islocked(tv)
3384     typval_T	*tv;
3385 {
3386     return (tv->v_lock & VAR_LOCKED)
3387 	|| (tv->v_type == VAR_LIST
3388 		&& tv->vval.v_list != NULL
3389 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3390 	|| (tv->v_type == VAR_DICT
3391 		&& tv->vval.v_dict != NULL
3392 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3393 }
3394 
3395 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3396 /*
3397  * Delete all "menutrans_" variables.
3398  */
3399     void
3400 del_menutrans_vars()
3401 {
3402     hashitem_T	*hi;
3403     int		todo;
3404 
3405     hash_lock(&globvarht);
3406     todo = globvarht.ht_used;
3407     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3408     {
3409 	if (!HASHITEM_EMPTY(hi))
3410 	{
3411 	    --todo;
3412 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3413 		delete_var(&globvarht, hi);
3414 	}
3415     }
3416     hash_unlock(&globvarht);
3417 }
3418 #endif
3419 
3420 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3421 
3422 /*
3423  * Local string buffer for the next two functions to store a variable name
3424  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3425  * get_user_var_name().
3426  */
3427 
3428 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3429 
3430 static char_u	*varnamebuf = NULL;
3431 static int	varnamebuflen = 0;
3432 
3433 /*
3434  * Function to concatenate a prefix and a variable name.
3435  */
3436     static char_u *
3437 cat_prefix_varname(prefix, name)
3438     int		prefix;
3439     char_u	*name;
3440 {
3441     int		len;
3442 
3443     len = (int)STRLEN(name) + 3;
3444     if (len > varnamebuflen)
3445     {
3446 	vim_free(varnamebuf);
3447 	len += 10;			/* some additional space */
3448 	varnamebuf = alloc(len);
3449 	if (varnamebuf == NULL)
3450 	{
3451 	    varnamebuflen = 0;
3452 	    return NULL;
3453 	}
3454 	varnamebuflen = len;
3455     }
3456     *varnamebuf = prefix;
3457     varnamebuf[1] = ':';
3458     STRCPY(varnamebuf + 2, name);
3459     return varnamebuf;
3460 }
3461 
3462 /*
3463  * Function given to ExpandGeneric() to obtain the list of user defined
3464  * (global/buffer/window/built-in) variable names.
3465  */
3466 /*ARGSUSED*/
3467     char_u *
3468 get_user_var_name(xp, idx)
3469     expand_T	*xp;
3470     int		idx;
3471 {
3472     static long_u	gdone;
3473     static long_u	bdone;
3474     static long_u	wdone;
3475     static int		vidx;
3476     static hashitem_T	*hi;
3477     hashtab_T		*ht;
3478 
3479     if (idx == 0)
3480 	gdone = bdone = wdone = vidx = 0;
3481 
3482     /* Global variables */
3483     if (gdone < globvarht.ht_used)
3484     {
3485 	if (gdone++ == 0)
3486 	    hi = globvarht.ht_array;
3487 	else
3488 	    ++hi;
3489 	while (HASHITEM_EMPTY(hi))
3490 	    ++hi;
3491 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3492 	    return cat_prefix_varname('g', hi->hi_key);
3493 	return hi->hi_key;
3494     }
3495 
3496     /* b: variables */
3497     ht = &curbuf->b_vars.dv_hashtab;
3498     if (bdone < ht->ht_used)
3499     {
3500 	if (bdone++ == 0)
3501 	    hi = ht->ht_array;
3502 	else
3503 	    ++hi;
3504 	while (HASHITEM_EMPTY(hi))
3505 	    ++hi;
3506 	return cat_prefix_varname('b', hi->hi_key);
3507     }
3508     if (bdone == ht->ht_used)
3509     {
3510 	++bdone;
3511 	return (char_u *)"b:changedtick";
3512     }
3513 
3514     /* w: variables */
3515     ht = &curwin->w_vars.dv_hashtab;
3516     if (wdone < ht->ht_used)
3517     {
3518 	if (wdone++ == 0)
3519 	    hi = ht->ht_array;
3520 	else
3521 	    ++hi;
3522 	while (HASHITEM_EMPTY(hi))
3523 	    ++hi;
3524 	return cat_prefix_varname('w', hi->hi_key);
3525     }
3526 
3527     /* v: variables */
3528     if (vidx < VV_LEN)
3529 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3530 
3531     vim_free(varnamebuf);
3532     varnamebuf = NULL;
3533     varnamebuflen = 0;
3534     return NULL;
3535 }
3536 
3537 #endif /* FEAT_CMDL_COMPL */
3538 
3539 /*
3540  * types for expressions.
3541  */
3542 typedef enum
3543 {
3544     TYPE_UNKNOWN = 0
3545     , TYPE_EQUAL	/* == */
3546     , TYPE_NEQUAL	/* != */
3547     , TYPE_GREATER	/* >  */
3548     , TYPE_GEQUAL	/* >= */
3549     , TYPE_SMALLER	/* <  */
3550     , TYPE_SEQUAL	/* <= */
3551     , TYPE_MATCH	/* =~ */
3552     , TYPE_NOMATCH	/* !~ */
3553 } exptype_T;
3554 
3555 /*
3556  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3557  * executed.  The function may return OK, but the rettv will be of type
3558  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3559  */
3560 
3561 /*
3562  * Handle zero level expression.
3563  * This calls eval1() and handles error message and nextcmd.
3564  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3565  * Return OK or FAIL.
3566  */
3567     static int
3568 eval0(arg, rettv, nextcmd, evaluate)
3569     char_u	*arg;
3570     typval_T	*rettv;
3571     char_u	**nextcmd;
3572     int		evaluate;
3573 {
3574     int		ret;
3575     char_u	*p;
3576 
3577     p = skipwhite(arg);
3578     ret = eval1(&p, rettv, evaluate);
3579     if (ret == FAIL || !ends_excmd(*p))
3580     {
3581 	if (ret != FAIL)
3582 	    clear_tv(rettv);
3583 	/*
3584 	 * Report the invalid expression unless the expression evaluation has
3585 	 * been cancelled due to an aborting error, an interrupt, or an
3586 	 * exception.
3587 	 */
3588 	if (!aborting())
3589 	    EMSG2(_(e_invexpr2), arg);
3590 	ret = FAIL;
3591     }
3592     if (nextcmd != NULL)
3593 	*nextcmd = check_nextcmd(p);
3594 
3595     return ret;
3596 }
3597 
3598 /*
3599  * Handle top level expression:
3600  *	expr1 ? expr0 : expr0
3601  *
3602  * "arg" must point to the first non-white of the expression.
3603  * "arg" is advanced to the next non-white after the recognized expression.
3604  *
3605  * Return OK or FAIL.
3606  */
3607     static int
3608 eval1(arg, rettv, evaluate)
3609     char_u	**arg;
3610     typval_T	*rettv;
3611     int		evaluate;
3612 {
3613     int		result;
3614     typval_T	var2;
3615 
3616     /*
3617      * Get the first variable.
3618      */
3619     if (eval2(arg, rettv, evaluate) == FAIL)
3620 	return FAIL;
3621 
3622     if ((*arg)[0] == '?')
3623     {
3624 	result = FALSE;
3625 	if (evaluate)
3626 	{
3627 	    int		error = FALSE;
3628 
3629 	    if (get_tv_number_chk(rettv, &error) != 0)
3630 		result = TRUE;
3631 	    clear_tv(rettv);
3632 	    if (error)
3633 		return FAIL;
3634 	}
3635 
3636 	/*
3637 	 * Get the second variable.
3638 	 */
3639 	*arg = skipwhite(*arg + 1);
3640 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3641 	    return FAIL;
3642 
3643 	/*
3644 	 * Check for the ":".
3645 	 */
3646 	if ((*arg)[0] != ':')
3647 	{
3648 	    EMSG(_("E109: Missing ':' after '?'"));
3649 	    if (evaluate && result)
3650 		clear_tv(rettv);
3651 	    return FAIL;
3652 	}
3653 
3654 	/*
3655 	 * Get the third variable.
3656 	 */
3657 	*arg = skipwhite(*arg + 1);
3658 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3659 	{
3660 	    if (evaluate && result)
3661 		clear_tv(rettv);
3662 	    return FAIL;
3663 	}
3664 	if (evaluate && !result)
3665 	    *rettv = var2;
3666     }
3667 
3668     return OK;
3669 }
3670 
3671 /*
3672  * Handle first level expression:
3673  *	expr2 || expr2 || expr2	    logical OR
3674  *
3675  * "arg" must point to the first non-white of the expression.
3676  * "arg" is advanced to the next non-white after the recognized expression.
3677  *
3678  * Return OK or FAIL.
3679  */
3680     static int
3681 eval2(arg, rettv, evaluate)
3682     char_u	**arg;
3683     typval_T	*rettv;
3684     int		evaluate;
3685 {
3686     typval_T	var2;
3687     long	result;
3688     int		first;
3689     int		error = FALSE;
3690 
3691     /*
3692      * Get the first variable.
3693      */
3694     if (eval3(arg, rettv, evaluate) == FAIL)
3695 	return FAIL;
3696 
3697     /*
3698      * Repeat until there is no following "||".
3699      */
3700     first = TRUE;
3701     result = FALSE;
3702     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3703     {
3704 	if (evaluate && first)
3705 	{
3706 	    if (get_tv_number_chk(rettv, &error) != 0)
3707 		result = TRUE;
3708 	    clear_tv(rettv);
3709 	    if (error)
3710 		return FAIL;
3711 	    first = FALSE;
3712 	}
3713 
3714 	/*
3715 	 * Get the second variable.
3716 	 */
3717 	*arg = skipwhite(*arg + 2);
3718 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3719 	    return FAIL;
3720 
3721 	/*
3722 	 * Compute the result.
3723 	 */
3724 	if (evaluate && !result)
3725 	{
3726 	    if (get_tv_number_chk(&var2, &error) != 0)
3727 		result = TRUE;
3728 	    clear_tv(&var2);
3729 	    if (error)
3730 		return FAIL;
3731 	}
3732 	if (evaluate)
3733 	{
3734 	    rettv->v_type = VAR_NUMBER;
3735 	    rettv->vval.v_number = result;
3736 	}
3737     }
3738 
3739     return OK;
3740 }
3741 
3742 /*
3743  * Handle second level expression:
3744  *	expr3 && expr3 && expr3	    logical AND
3745  *
3746  * "arg" must point to the first non-white of the expression.
3747  * "arg" is advanced to the next non-white after the recognized expression.
3748  *
3749  * Return OK or FAIL.
3750  */
3751     static int
3752 eval3(arg, rettv, evaluate)
3753     char_u	**arg;
3754     typval_T	*rettv;
3755     int		evaluate;
3756 {
3757     typval_T	var2;
3758     long	result;
3759     int		first;
3760     int		error = FALSE;
3761 
3762     /*
3763      * Get the first variable.
3764      */
3765     if (eval4(arg, rettv, evaluate) == FAIL)
3766 	return FAIL;
3767 
3768     /*
3769      * Repeat until there is no following "&&".
3770      */
3771     first = TRUE;
3772     result = TRUE;
3773     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3774     {
3775 	if (evaluate && first)
3776 	{
3777 	    if (get_tv_number_chk(rettv, &error) == 0)
3778 		result = FALSE;
3779 	    clear_tv(rettv);
3780 	    if (error)
3781 		return FAIL;
3782 	    first = FALSE;
3783 	}
3784 
3785 	/*
3786 	 * Get the second variable.
3787 	 */
3788 	*arg = skipwhite(*arg + 2);
3789 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3790 	    return FAIL;
3791 
3792 	/*
3793 	 * Compute the result.
3794 	 */
3795 	if (evaluate && result)
3796 	{
3797 	    if (get_tv_number_chk(&var2, &error) == 0)
3798 		result = FALSE;
3799 	    clear_tv(&var2);
3800 	    if (error)
3801 		return FAIL;
3802 	}
3803 	if (evaluate)
3804 	{
3805 	    rettv->v_type = VAR_NUMBER;
3806 	    rettv->vval.v_number = result;
3807 	}
3808     }
3809 
3810     return OK;
3811 }
3812 
3813 /*
3814  * Handle third level expression:
3815  *	var1 == var2
3816  *	var1 =~ var2
3817  *	var1 != var2
3818  *	var1 !~ var2
3819  *	var1 > var2
3820  *	var1 >= var2
3821  *	var1 < var2
3822  *	var1 <= var2
3823  *	var1 is var2
3824  *	var1 isnot var2
3825  *
3826  * "arg" must point to the first non-white of the expression.
3827  * "arg" is advanced to the next non-white after the recognized expression.
3828  *
3829  * Return OK or FAIL.
3830  */
3831     static int
3832 eval4(arg, rettv, evaluate)
3833     char_u	**arg;
3834     typval_T	*rettv;
3835     int		evaluate;
3836 {
3837     typval_T	var2;
3838     char_u	*p;
3839     int		i;
3840     exptype_T	type = TYPE_UNKNOWN;
3841     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3842     int		len = 2;
3843     long	n1, n2;
3844     char_u	*s1, *s2;
3845     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3846     regmatch_T	regmatch;
3847     int		ic;
3848     char_u	*save_cpo;
3849 
3850     /*
3851      * Get the first variable.
3852      */
3853     if (eval5(arg, rettv, evaluate) == FAIL)
3854 	return FAIL;
3855 
3856     p = *arg;
3857     switch (p[0])
3858     {
3859 	case '=':   if (p[1] == '=')
3860 			type = TYPE_EQUAL;
3861 		    else if (p[1] == '~')
3862 			type = TYPE_MATCH;
3863 		    break;
3864 	case '!':   if (p[1] == '=')
3865 			type = TYPE_NEQUAL;
3866 		    else if (p[1] == '~')
3867 			type = TYPE_NOMATCH;
3868 		    break;
3869 	case '>':   if (p[1] != '=')
3870 		    {
3871 			type = TYPE_GREATER;
3872 			len = 1;
3873 		    }
3874 		    else
3875 			type = TYPE_GEQUAL;
3876 		    break;
3877 	case '<':   if (p[1] != '=')
3878 		    {
3879 			type = TYPE_SMALLER;
3880 			len = 1;
3881 		    }
3882 		    else
3883 			type = TYPE_SEQUAL;
3884 		    break;
3885 	case 'i':   if (p[1] == 's')
3886 		    {
3887 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3888 			    len = 5;
3889 			if (!vim_isIDc(p[len]))
3890 			{
3891 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3892 			    type_is = TRUE;
3893 			}
3894 		    }
3895 		    break;
3896     }
3897 
3898     /*
3899      * If there is a comparitive operator, use it.
3900      */
3901     if (type != TYPE_UNKNOWN)
3902     {
3903 	/* extra question mark appended: ignore case */
3904 	if (p[len] == '?')
3905 	{
3906 	    ic = TRUE;
3907 	    ++len;
3908 	}
3909 	/* extra '#' appended: match case */
3910 	else if (p[len] == '#')
3911 	{
3912 	    ic = FALSE;
3913 	    ++len;
3914 	}
3915 	/* nothing appened: use 'ignorecase' */
3916 	else
3917 	    ic = p_ic;
3918 
3919 	/*
3920 	 * Get the second variable.
3921 	 */
3922 	*arg = skipwhite(p + len);
3923 	if (eval5(arg, &var2, evaluate) == FAIL)
3924 	{
3925 	    clear_tv(rettv);
3926 	    return FAIL;
3927 	}
3928 
3929 	if (evaluate)
3930 	{
3931 	    if (type_is && rettv->v_type != var2.v_type)
3932 	    {
3933 		/* For "is" a different type always means FALSE, for "notis"
3934 		 * it means TRUE. */
3935 		n1 = (type == TYPE_NEQUAL);
3936 	    }
3937 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
3938 	    {
3939 		if (type_is)
3940 		{
3941 		    n1 = (rettv->v_type == var2.v_type
3942 				   && rettv->vval.v_list == var2.vval.v_list);
3943 		    if (type == TYPE_NEQUAL)
3944 			n1 = !n1;
3945 		}
3946 		else if (rettv->v_type != var2.v_type
3947 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3948 		{
3949 		    if (rettv->v_type != var2.v_type)
3950 			EMSG(_("E691: Can only compare List with List"));
3951 		    else
3952 			EMSG(_("E692: Invalid operation for Lists"));
3953 		    clear_tv(rettv);
3954 		    clear_tv(&var2);
3955 		    return FAIL;
3956 		}
3957 		else
3958 		{
3959 		    /* Compare two Lists for being equal or unequal. */
3960 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
3961 		    if (type == TYPE_NEQUAL)
3962 			n1 = !n1;
3963 		}
3964 	    }
3965 
3966 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
3967 	    {
3968 		if (type_is)
3969 		{
3970 		    n1 = (rettv->v_type == var2.v_type
3971 				   && rettv->vval.v_dict == var2.vval.v_dict);
3972 		    if (type == TYPE_NEQUAL)
3973 			n1 = !n1;
3974 		}
3975 		else if (rettv->v_type != var2.v_type
3976 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3977 		{
3978 		    if (rettv->v_type != var2.v_type)
3979 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
3980 		    else
3981 			EMSG(_("E736: Invalid operation for Dictionary"));
3982 		    clear_tv(rettv);
3983 		    clear_tv(&var2);
3984 		    return FAIL;
3985 		}
3986 		else
3987 		{
3988 		    /* Compare two Dictionaries for being equal or unequal. */
3989 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
3990 		    if (type == TYPE_NEQUAL)
3991 			n1 = !n1;
3992 		}
3993 	    }
3994 
3995 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
3996 	    {
3997 		if (rettv->v_type != var2.v_type
3998 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3999 		{
4000 		    if (rettv->v_type != var2.v_type)
4001 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4002 		    else
4003 			EMSG(_("E694: Invalid operation for Funcrefs"));
4004 		    clear_tv(rettv);
4005 		    clear_tv(&var2);
4006 		    return FAIL;
4007 		}
4008 		else
4009 		{
4010 		    /* Compare two Funcrefs for being equal or unequal. */
4011 		    if (rettv->vval.v_string == NULL
4012 						|| var2.vval.v_string == NULL)
4013 			n1 = FALSE;
4014 		    else
4015 			n1 = STRCMP(rettv->vval.v_string,
4016 						     var2.vval.v_string) == 0;
4017 		    if (type == TYPE_NEQUAL)
4018 			n1 = !n1;
4019 		}
4020 	    }
4021 
4022 	    /*
4023 	     * If one of the two variables is a number, compare as a number.
4024 	     * When using "=~" or "!~", always compare as string.
4025 	     */
4026 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4027 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4028 	    {
4029 		n1 = get_tv_number(rettv);
4030 		n2 = get_tv_number(&var2);
4031 		switch (type)
4032 		{
4033 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4034 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4035 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4036 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4037 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4038 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4039 		    case TYPE_UNKNOWN:
4040 		    case TYPE_MATCH:
4041 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4042 		}
4043 	    }
4044 	    else
4045 	    {
4046 		s1 = get_tv_string_buf(rettv, buf1);
4047 		s2 = get_tv_string_buf(&var2, buf2);
4048 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4049 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4050 		else
4051 		    i = 0;
4052 		n1 = FALSE;
4053 		switch (type)
4054 		{
4055 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4056 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4057 		    case TYPE_GREATER:  n1 = (i > 0); break;
4058 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4059 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4060 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4061 
4062 		    case TYPE_MATCH:
4063 		    case TYPE_NOMATCH:
4064 			    /* avoid 'l' flag in 'cpoptions' */
4065 			    save_cpo = p_cpo;
4066 			    p_cpo = (char_u *)"";
4067 			    regmatch.regprog = vim_regcomp(s2,
4068 							RE_MAGIC + RE_STRING);
4069 			    regmatch.rm_ic = ic;
4070 			    if (regmatch.regprog != NULL)
4071 			    {
4072 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4073 				vim_free(regmatch.regprog);
4074 				if (type == TYPE_NOMATCH)
4075 				    n1 = !n1;
4076 			    }
4077 			    p_cpo = save_cpo;
4078 			    break;
4079 
4080 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4081 		}
4082 	    }
4083 	    clear_tv(rettv);
4084 	    clear_tv(&var2);
4085 	    rettv->v_type = VAR_NUMBER;
4086 	    rettv->vval.v_number = n1;
4087 	}
4088     }
4089 
4090     return OK;
4091 }
4092 
4093 /*
4094  * Handle fourth level expression:
4095  *	+	number addition
4096  *	-	number subtraction
4097  *	.	string concatenation
4098  *
4099  * "arg" must point to the first non-white of the expression.
4100  * "arg" is advanced to the next non-white after the recognized expression.
4101  *
4102  * Return OK or FAIL.
4103  */
4104     static int
4105 eval5(arg, rettv, evaluate)
4106     char_u	**arg;
4107     typval_T	*rettv;
4108     int		evaluate;
4109 {
4110     typval_T	var2;
4111     typval_T	var3;
4112     int		op;
4113     long	n1, n2;
4114     char_u	*s1, *s2;
4115     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4116     char_u	*p;
4117 
4118     /*
4119      * Get the first variable.
4120      */
4121     if (eval6(arg, rettv, evaluate) == FAIL)
4122 	return FAIL;
4123 
4124     /*
4125      * Repeat computing, until no '+', '-' or '.' is following.
4126      */
4127     for (;;)
4128     {
4129 	op = **arg;
4130 	if (op != '+' && op != '-' && op != '.')
4131 	    break;
4132 
4133 	if (op != '+' || rettv->v_type != VAR_LIST)
4134 	{
4135 	    /* For "list + ...", an illegal use of the first operand as
4136 	     * a number cannot be determined before evaluating the 2nd
4137 	     * operand: if this is also a list, all is ok.
4138 	     * For "something . ...", "something - ..." or "non-list + ...",
4139 	     * we know that the first operand needs to be a string or number
4140 	     * without evaluating the 2nd operand.  So check before to avoid
4141 	     * side effects after an error. */
4142 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4143 	    {
4144 		clear_tv(rettv);
4145 		return FAIL;
4146 	    }
4147 	}
4148 
4149 	/*
4150 	 * Get the second variable.
4151 	 */
4152 	*arg = skipwhite(*arg + 1);
4153 	if (eval6(arg, &var2, evaluate) == FAIL)
4154 	{
4155 	    clear_tv(rettv);
4156 	    return FAIL;
4157 	}
4158 
4159 	if (evaluate)
4160 	{
4161 	    /*
4162 	     * Compute the result.
4163 	     */
4164 	    if (op == '.')
4165 	    {
4166 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4167 		s2 = get_tv_string_buf_chk(&var2, buf2);
4168 		if (s2 == NULL)		/* type error ? */
4169 		{
4170 		    clear_tv(rettv);
4171 		    clear_tv(&var2);
4172 		    return FAIL;
4173 		}
4174 		p = concat_str(s1, s2);
4175 		clear_tv(rettv);
4176 		rettv->v_type = VAR_STRING;
4177 		rettv->vval.v_string = p;
4178 	    }
4179 	    else if (op == '+' && rettv->v_type == VAR_LIST
4180 						   && var2.v_type == VAR_LIST)
4181 	    {
4182 		/* concatenate Lists */
4183 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4184 							       &var3) == FAIL)
4185 		{
4186 		    clear_tv(rettv);
4187 		    clear_tv(&var2);
4188 		    return FAIL;
4189 		}
4190 		clear_tv(rettv);
4191 		*rettv = var3;
4192 	    }
4193 	    else
4194 	    {
4195 		int	    error = FALSE;
4196 
4197 		n1 = get_tv_number_chk(rettv, &error);
4198 		if (error)
4199 		{
4200 		    /* This can only happen for "list + non-list".
4201 		     * For "non-list + ..." or "something - ...", we returned
4202 		     * before evaluating the 2nd operand. */
4203 		    clear_tv(rettv);
4204 		    return FAIL;
4205 		}
4206 		n2 = get_tv_number_chk(&var2, &error);
4207 		if (error)
4208 		{
4209 		    clear_tv(rettv);
4210 		    clear_tv(&var2);
4211 		    return FAIL;
4212 		}
4213 		clear_tv(rettv);
4214 		if (op == '+')
4215 		    n1 = n1 + n2;
4216 		else
4217 		    n1 = n1 - n2;
4218 		rettv->v_type = VAR_NUMBER;
4219 		rettv->vval.v_number = n1;
4220 	    }
4221 	    clear_tv(&var2);
4222 	}
4223     }
4224     return OK;
4225 }
4226 
4227 /*
4228  * Handle fifth level expression:
4229  *	*	number multiplication
4230  *	/	number division
4231  *	%	number modulo
4232  *
4233  * "arg" must point to the first non-white of the expression.
4234  * "arg" is advanced to the next non-white after the recognized expression.
4235  *
4236  * Return OK or FAIL.
4237  */
4238     static int
4239 eval6(arg, rettv, evaluate)
4240     char_u	**arg;
4241     typval_T	*rettv;
4242     int		evaluate;
4243 {
4244     typval_T	var2;
4245     int		op;
4246     long	n1, n2;
4247     int		error = FALSE;
4248 
4249     /*
4250      * Get the first variable.
4251      */
4252     if (eval7(arg, rettv, evaluate) == FAIL)
4253 	return FAIL;
4254 
4255     /*
4256      * Repeat computing, until no '*', '/' or '%' is following.
4257      */
4258     for (;;)
4259     {
4260 	op = **arg;
4261 	if (op != '*' && op != '/' && op != '%')
4262 	    break;
4263 
4264 	if (evaluate)
4265 	{
4266 	    n1 = get_tv_number_chk(rettv, &error);
4267 	    clear_tv(rettv);
4268 	    if (error)
4269 		return FAIL;
4270 	}
4271 	else
4272 	    n1 = 0;
4273 
4274 	/*
4275 	 * Get the second variable.
4276 	 */
4277 	*arg = skipwhite(*arg + 1);
4278 	if (eval7(arg, &var2, evaluate) == FAIL)
4279 	    return FAIL;
4280 
4281 	if (evaluate)
4282 	{
4283 	    n2 = get_tv_number_chk(&var2, &error);
4284 	    clear_tv(&var2);
4285 	    if (error)
4286 		return FAIL;
4287 
4288 	    /*
4289 	     * Compute the result.
4290 	     */
4291 	    if (op == '*')
4292 		n1 = n1 * n2;
4293 	    else if (op == '/')
4294 	    {
4295 		if (n2 == 0)	/* give an error message? */
4296 		    n1 = 0x7fffffffL;
4297 		else
4298 		    n1 = n1 / n2;
4299 	    }
4300 	    else
4301 	    {
4302 		if (n2 == 0)	/* give an error message? */
4303 		    n1 = 0;
4304 		else
4305 		    n1 = n1 % n2;
4306 	    }
4307 	    rettv->v_type = VAR_NUMBER;
4308 	    rettv->vval.v_number = n1;
4309 	}
4310     }
4311 
4312     return OK;
4313 }
4314 
4315 /*
4316  * Handle sixth level expression:
4317  *  number		number constant
4318  *  "string"		string contstant
4319  *  'string'		literal string contstant
4320  *  &option-name	option value
4321  *  @r			register contents
4322  *  identifier		variable value
4323  *  function()		function call
4324  *  $VAR		environment variable
4325  *  (expression)	nested expression
4326  *  [expr, expr]	List
4327  *  {key: val, key: val}  Dictionary
4328  *
4329  *  Also handle:
4330  *  ! in front		logical NOT
4331  *  - in front		unary minus
4332  *  + in front		unary plus (ignored)
4333  *  trailing []		subscript in String or List
4334  *  trailing .name	entry in Dictionary
4335  *
4336  * "arg" must point to the first non-white of the expression.
4337  * "arg" is advanced to the next non-white after the recognized expression.
4338  *
4339  * Return OK or FAIL.
4340  */
4341     static int
4342 eval7(arg, rettv, evaluate)
4343     char_u	**arg;
4344     typval_T	*rettv;
4345     int		evaluate;
4346 {
4347     long	n;
4348     int		len;
4349     char_u	*s;
4350     int		val;
4351     char_u	*start_leader, *end_leader;
4352     int		ret = OK;
4353     char_u	*alias;
4354 
4355     /*
4356      * Initialise variable so that clear_tv() can't mistake this for a
4357      * string and free a string that isn't there.
4358      */
4359     rettv->v_type = VAR_UNKNOWN;
4360 
4361     /*
4362      * Skip '!' and '-' characters.  They are handled later.
4363      */
4364     start_leader = *arg;
4365     while (**arg == '!' || **arg == '-' || **arg == '+')
4366 	*arg = skipwhite(*arg + 1);
4367     end_leader = *arg;
4368 
4369     switch (**arg)
4370     {
4371     /*
4372      * Number constant.
4373      */
4374     case '0':
4375     case '1':
4376     case '2':
4377     case '3':
4378     case '4':
4379     case '5':
4380     case '6':
4381     case '7':
4382     case '8':
4383     case '9':
4384 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4385 		*arg += len;
4386 		if (evaluate)
4387 		{
4388 		    rettv->v_type = VAR_NUMBER;
4389 		    rettv->vval.v_number = n;
4390 		}
4391 		break;
4392 
4393     /*
4394      * String constant: "string".
4395      */
4396     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4397 		break;
4398 
4399     /*
4400      * Literal string constant: 'str''ing'.
4401      */
4402     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4403 		break;
4404 
4405     /*
4406      * List: [expr, expr]
4407      */
4408     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4409 		break;
4410 
4411     /*
4412      * Dictionary: {key: val, key: val}
4413      */
4414     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4415 		break;
4416 
4417     /*
4418      * Option value: &name
4419      */
4420     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4421 		break;
4422 
4423     /*
4424      * Environment variable: $VAR.
4425      */
4426     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4427 		break;
4428 
4429     /*
4430      * Register contents: @r.
4431      */
4432     case '@':	++*arg;
4433 		if (evaluate)
4434 		{
4435 		    rettv->v_type = VAR_STRING;
4436 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4437 		}
4438 		if (**arg != NUL)
4439 		    ++*arg;
4440 		break;
4441 
4442     /*
4443      * nested expression: (expression).
4444      */
4445     case '(':	*arg = skipwhite(*arg + 1);
4446 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4447 		if (**arg == ')')
4448 		    ++*arg;
4449 		else if (ret == OK)
4450 		{
4451 		    EMSG(_("E110: Missing ')'"));
4452 		    clear_tv(rettv);
4453 		    ret = FAIL;
4454 		}
4455 		break;
4456 
4457     default:	ret = NOTDONE;
4458 		break;
4459     }
4460 
4461     if (ret == NOTDONE)
4462     {
4463 	/*
4464 	 * Must be a variable or function name.
4465 	 * Can also be a curly-braces kind of name: {expr}.
4466 	 */
4467 	s = *arg;
4468 	len = get_name_len(arg, &alias, evaluate, TRUE);
4469 	if (alias != NULL)
4470 	    s = alias;
4471 
4472 	if (len <= 0)
4473 	    ret = FAIL;
4474 	else
4475 	{
4476 	    if (**arg == '(')		/* recursive! */
4477 	    {
4478 		/* If "s" is the name of a variable of type VAR_FUNC
4479 		 * use its contents. */
4480 		s = deref_func_name(s, &len);
4481 
4482 		/* Invoke the function. */
4483 		ret = get_func_tv(s, len, rettv, arg,
4484 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4485 			  &len, evaluate, NULL);
4486 		/* Stop the expression evaluation when immediately
4487 		 * aborting on error, or when an interrupt occurred or
4488 		 * an exception was thrown but not caught. */
4489 		if (aborting())
4490 		{
4491 		    if (ret == OK)
4492 			clear_tv(rettv);
4493 		    ret = FAIL;
4494 		}
4495 	    }
4496 	    else if (evaluate)
4497 		ret = get_var_tv(s, len, rettv, TRUE);
4498 	    else
4499 		ret = OK;
4500 	}
4501 
4502 	if (alias != NULL)
4503 	    vim_free(alias);
4504     }
4505 
4506     *arg = skipwhite(*arg);
4507 
4508     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4509      * expr(expr). */
4510     if (ret == OK)
4511 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4512 
4513     /*
4514      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4515      */
4516     if (ret == OK && evaluate && end_leader > start_leader)
4517     {
4518 	int	    error = FALSE;
4519 
4520 	val = get_tv_number_chk(rettv, &error);
4521 	if (error)
4522 	{
4523 	    clear_tv(rettv);
4524 	    ret = FAIL;
4525 	}
4526 	else
4527 	{
4528 	    while (end_leader > start_leader)
4529 	    {
4530 		--end_leader;
4531 		if (*end_leader == '!')
4532 		    val = !val;
4533 		else if (*end_leader == '-')
4534 		    val = -val;
4535 	    }
4536 	    clear_tv(rettv);
4537 	    rettv->v_type = VAR_NUMBER;
4538 	    rettv->vval.v_number = val;
4539 	}
4540     }
4541 
4542     return ret;
4543 }
4544 
4545 /*
4546  * Evaluate an "[expr]" or "[expr:expr]" index.
4547  * "*arg" points to the '['.
4548  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4549  */
4550     static int
4551 eval_index(arg, rettv, evaluate, verbose)
4552     char_u	**arg;
4553     typval_T	*rettv;
4554     int		evaluate;
4555     int		verbose;	/* give error messages */
4556 {
4557     int		empty1 = FALSE, empty2 = FALSE;
4558     typval_T	var1, var2;
4559     long	n1, n2 = 0;
4560     long	len = -1;
4561     int		range = FALSE;
4562     char_u	*s;
4563     char_u	*key = NULL;
4564 
4565     if (rettv->v_type == VAR_FUNC)
4566     {
4567 	if (verbose)
4568 	    EMSG(_("E695: Cannot index a Funcref"));
4569 	return FAIL;
4570     }
4571 
4572     if (**arg == '.')
4573     {
4574 	/*
4575 	 * dict.name
4576 	 */
4577 	key = *arg + 1;
4578 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4579 	    ;
4580 	if (len == 0)
4581 	    return FAIL;
4582 	*arg = skipwhite(key + len);
4583     }
4584     else
4585     {
4586 	/*
4587 	 * something[idx]
4588 	 *
4589 	 * Get the (first) variable from inside the [].
4590 	 */
4591 	*arg = skipwhite(*arg + 1);
4592 	if (**arg == ':')
4593 	    empty1 = TRUE;
4594 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4595 	    return FAIL;
4596 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4597 	{
4598 	    /* not a number or string */
4599 	    clear_tv(&var1);
4600 	    return FAIL;
4601 	}
4602 
4603 	/*
4604 	 * Get the second variable from inside the [:].
4605 	 */
4606 	if (**arg == ':')
4607 	{
4608 	    range = TRUE;
4609 	    *arg = skipwhite(*arg + 1);
4610 	    if (**arg == ']')
4611 		empty2 = TRUE;
4612 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4613 	    {
4614 		if (!empty1)
4615 		    clear_tv(&var1);
4616 		return FAIL;
4617 	    }
4618 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4619 	    {
4620 		/* not a number or string */
4621 		if (!empty1)
4622 		    clear_tv(&var1);
4623 		clear_tv(&var2);
4624 		return FAIL;
4625 	    }
4626 	}
4627 
4628 	/* Check for the ']'. */
4629 	if (**arg != ']')
4630 	{
4631 	    if (verbose)
4632 		EMSG(_(e_missbrac));
4633 	    clear_tv(&var1);
4634 	    if (range)
4635 		clear_tv(&var2);
4636 	    return FAIL;
4637 	}
4638 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4639     }
4640 
4641     if (evaluate)
4642     {
4643 	n1 = 0;
4644 	if (!empty1 && rettv->v_type != VAR_DICT)
4645 	{
4646 	    n1 = get_tv_number(&var1);
4647 	    clear_tv(&var1);
4648 	}
4649 	if (range)
4650 	{
4651 	    if (empty2)
4652 		n2 = -1;
4653 	    else
4654 	    {
4655 		n2 = get_tv_number(&var2);
4656 		clear_tv(&var2);
4657 	    }
4658 	}
4659 
4660 	switch (rettv->v_type)
4661 	{
4662 	    case VAR_NUMBER:
4663 	    case VAR_STRING:
4664 		s = get_tv_string(rettv);
4665 		len = (long)STRLEN(s);
4666 		if (range)
4667 		{
4668 		    /* The resulting variable is a substring.  If the indexes
4669 		     * are out of range the result is empty. */
4670 		    if (n1 < 0)
4671 		    {
4672 			n1 = len + n1;
4673 			if (n1 < 0)
4674 			    n1 = 0;
4675 		    }
4676 		    if (n2 < 0)
4677 			n2 = len + n2;
4678 		    else if (n2 >= len)
4679 			n2 = len;
4680 		    if (n1 >= len || n2 < 0 || n1 > n2)
4681 			s = NULL;
4682 		    else
4683 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4684 		}
4685 		else
4686 		{
4687 		    /* The resulting variable is a string of a single
4688 		     * character.  If the index is too big or negative the
4689 		     * result is empty. */
4690 		    if (n1 >= len || n1 < 0)
4691 			s = NULL;
4692 		    else
4693 			s = vim_strnsave(s + n1, 1);
4694 		}
4695 		clear_tv(rettv);
4696 		rettv->v_type = VAR_STRING;
4697 		rettv->vval.v_string = s;
4698 		break;
4699 
4700 	    case VAR_LIST:
4701 		len = list_len(rettv->vval.v_list);
4702 		if (n1 < 0)
4703 		    n1 = len + n1;
4704 		if (!empty1 && (n1 < 0 || n1 >= len))
4705 		{
4706 		    if (verbose)
4707 			EMSGN(_(e_listidx), n1);
4708 		    return FAIL;
4709 		}
4710 		if (range)
4711 		{
4712 		    list_T	*l;
4713 		    listitem_T	*item;
4714 
4715 		    if (n2 < 0)
4716 			n2 = len + n2;
4717 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4718 		    {
4719 			if (verbose)
4720 			    EMSGN(_(e_listidx), n2);
4721 			return FAIL;
4722 		    }
4723 		    l = list_alloc();
4724 		    if (l == NULL)
4725 			return FAIL;
4726 		    for (item = list_find(rettv->vval.v_list, n1);
4727 							       n1 <= n2; ++n1)
4728 		    {
4729 			if (list_append_tv(l, &item->li_tv) == FAIL)
4730 			{
4731 			    list_free(l);
4732 			    return FAIL;
4733 			}
4734 			item = item->li_next;
4735 		    }
4736 		    clear_tv(rettv);
4737 		    rettv->v_type = VAR_LIST;
4738 		    rettv->vval.v_list = l;
4739 		    ++l->lv_refcount;
4740 		}
4741 		else
4742 		{
4743 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4744 								       &var1);
4745 		    clear_tv(rettv);
4746 		    *rettv = var1;
4747 		}
4748 		break;
4749 
4750 	    case VAR_DICT:
4751 		if (range)
4752 		{
4753 		    if (verbose)
4754 			EMSG(_(e_dictrange));
4755 		    if (len == -1)
4756 			clear_tv(&var1);
4757 		    return FAIL;
4758 		}
4759 		{
4760 		    dictitem_T	*item;
4761 
4762 		    if (len == -1)
4763 		    {
4764 			key = get_tv_string(&var1);
4765 			if (*key == NUL)
4766 			{
4767 			    if (verbose)
4768 				EMSG(_(e_emptykey));
4769 			    clear_tv(&var1);
4770 			    return FAIL;
4771 			}
4772 		    }
4773 
4774 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4775 
4776 		    if (item == NULL && verbose)
4777 			EMSG2(_(e_dictkey), key);
4778 		    if (len == -1)
4779 			clear_tv(&var1);
4780 		    if (item == NULL)
4781 			return FAIL;
4782 
4783 		    copy_tv(&item->di_tv, &var1);
4784 		    clear_tv(rettv);
4785 		    *rettv = var1;
4786 		}
4787 		break;
4788 	}
4789     }
4790 
4791     return OK;
4792 }
4793 
4794 /*
4795  * Get an option value.
4796  * "arg" points to the '&' or '+' before the option name.
4797  * "arg" is advanced to character after the option name.
4798  * Return OK or FAIL.
4799  */
4800     static int
4801 get_option_tv(arg, rettv, evaluate)
4802     char_u	**arg;
4803     typval_T	*rettv;	/* when NULL, only check if option exists */
4804     int		evaluate;
4805 {
4806     char_u	*option_end;
4807     long	numval;
4808     char_u	*stringval;
4809     int		opt_type;
4810     int		c;
4811     int		working = (**arg == '+');    /* has("+option") */
4812     int		ret = OK;
4813     int		opt_flags;
4814 
4815     /*
4816      * Isolate the option name and find its value.
4817      */
4818     option_end = find_option_end(arg, &opt_flags);
4819     if (option_end == NULL)
4820     {
4821 	if (rettv != NULL)
4822 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4823 	return FAIL;
4824     }
4825 
4826     if (!evaluate)
4827     {
4828 	*arg = option_end;
4829 	return OK;
4830     }
4831 
4832     c = *option_end;
4833     *option_end = NUL;
4834     opt_type = get_option_value(*arg, &numval,
4835 			       rettv == NULL ? NULL : &stringval, opt_flags);
4836 
4837     if (opt_type == -3)			/* invalid name */
4838     {
4839 	if (rettv != NULL)
4840 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4841 	ret = FAIL;
4842     }
4843     else if (rettv != NULL)
4844     {
4845 	if (opt_type == -2)		/* hidden string option */
4846 	{
4847 	    rettv->v_type = VAR_STRING;
4848 	    rettv->vval.v_string = NULL;
4849 	}
4850 	else if (opt_type == -1)	/* hidden number option */
4851 	{
4852 	    rettv->v_type = VAR_NUMBER;
4853 	    rettv->vval.v_number = 0;
4854 	}
4855 	else if (opt_type == 1)		/* number option */
4856 	{
4857 	    rettv->v_type = VAR_NUMBER;
4858 	    rettv->vval.v_number = numval;
4859 	}
4860 	else				/* string option */
4861 	{
4862 	    rettv->v_type = VAR_STRING;
4863 	    rettv->vval.v_string = stringval;
4864 	}
4865     }
4866     else if (working && (opt_type == -2 || opt_type == -1))
4867 	ret = FAIL;
4868 
4869     *option_end = c;		    /* put back for error messages */
4870     *arg = option_end;
4871 
4872     return ret;
4873 }
4874 
4875 /*
4876  * Allocate a variable for a string constant.
4877  * Return OK or FAIL.
4878  */
4879     static int
4880 get_string_tv(arg, rettv, evaluate)
4881     char_u	**arg;
4882     typval_T	*rettv;
4883     int		evaluate;
4884 {
4885     char_u	*p;
4886     char_u	*name;
4887     int		extra = 0;
4888 
4889     /*
4890      * Find the end of the string, skipping backslashed characters.
4891      */
4892     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4893     {
4894 	if (*p == '\\' && p[1] != NUL)
4895 	{
4896 	    ++p;
4897 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4898 	     * to 6 characters: reserve space for 2 extra */
4899 	    if (*p == '<')
4900 		extra += 2;
4901 	}
4902     }
4903 
4904     if (*p != '"')
4905     {
4906 	EMSG2(_("E114: Missing quote: %s"), *arg);
4907 	return FAIL;
4908     }
4909 
4910     /* If only parsing, set *arg and return here */
4911     if (!evaluate)
4912     {
4913 	*arg = p + 1;
4914 	return OK;
4915     }
4916 
4917     /*
4918      * Copy the string into allocated memory, handling backslashed
4919      * characters.
4920      */
4921     name = alloc((unsigned)(p - *arg + extra));
4922     if (name == NULL)
4923 	return FAIL;
4924     rettv->v_type = VAR_STRING;
4925     rettv->vval.v_string = name;
4926 
4927     for (p = *arg + 1; *p != NUL && *p != '"'; )
4928     {
4929 	if (*p == '\\')
4930 	{
4931 	    switch (*++p)
4932 	    {
4933 		case 'b': *name++ = BS; ++p; break;
4934 		case 'e': *name++ = ESC; ++p; break;
4935 		case 'f': *name++ = FF; ++p; break;
4936 		case 'n': *name++ = NL; ++p; break;
4937 		case 'r': *name++ = CAR; ++p; break;
4938 		case 't': *name++ = TAB; ++p; break;
4939 
4940 		case 'X': /* hex: "\x1", "\x12" */
4941 		case 'x':
4942 		case 'u': /* Unicode: "\u0023" */
4943 		case 'U':
4944 			  if (vim_isxdigit(p[1]))
4945 			  {
4946 			      int	n, nr;
4947 			      int	c = toupper(*p);
4948 
4949 			      if (c == 'X')
4950 				  n = 2;
4951 			      else
4952 				  n = 4;
4953 			      nr = 0;
4954 			      while (--n >= 0 && vim_isxdigit(p[1]))
4955 			      {
4956 				  ++p;
4957 				  nr = (nr << 4) + hex2nr(*p);
4958 			      }
4959 			      ++p;
4960 #ifdef FEAT_MBYTE
4961 			      /* For "\u" store the number according to
4962 			       * 'encoding'. */
4963 			      if (c != 'X')
4964 				  name += (*mb_char2bytes)(nr, name);
4965 			      else
4966 #endif
4967 				  *name++ = nr;
4968 			  }
4969 			  break;
4970 
4971 			  /* octal: "\1", "\12", "\123" */
4972 		case '0':
4973 		case '1':
4974 		case '2':
4975 		case '3':
4976 		case '4':
4977 		case '5':
4978 		case '6':
4979 		case '7': *name = *p++ - '0';
4980 			  if (*p >= '0' && *p <= '7')
4981 			  {
4982 			      *name = (*name << 3) + *p++ - '0';
4983 			      if (*p >= '0' && *p <= '7')
4984 				  *name = (*name << 3) + *p++ - '0';
4985 			  }
4986 			  ++name;
4987 			  break;
4988 
4989 			    /* Special key, e.g.: "\<C-W>" */
4990 		case '<': extra = trans_special(&p, name, TRUE);
4991 			  if (extra != 0)
4992 			  {
4993 			      name += extra;
4994 			      break;
4995 			  }
4996 			  /* FALLTHROUGH */
4997 
4998 		default:  MB_COPY_CHAR(p, name);
4999 			  break;
5000 	    }
5001 	}
5002 	else
5003 	    MB_COPY_CHAR(p, name);
5004 
5005     }
5006     *name = NUL;
5007     *arg = p + 1;
5008 
5009     return OK;
5010 }
5011 
5012 /*
5013  * Allocate a variable for a 'str''ing' constant.
5014  * Return OK or FAIL.
5015  */
5016     static int
5017 get_lit_string_tv(arg, rettv, evaluate)
5018     char_u	**arg;
5019     typval_T	*rettv;
5020     int		evaluate;
5021 {
5022     char_u	*p;
5023     char_u	*str;
5024     int		reduce = 0;
5025 
5026     /*
5027      * Find the end of the string, skipping ''.
5028      */
5029     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5030     {
5031 	if (*p == '\'')
5032 	{
5033 	    if (p[1] != '\'')
5034 		break;
5035 	    ++reduce;
5036 	    ++p;
5037 	}
5038     }
5039 
5040     if (*p != '\'')
5041     {
5042 	EMSG2(_("E115: Missing quote: %s"), *arg);
5043 	return FAIL;
5044     }
5045 
5046     /* If only parsing return after setting "*arg" */
5047     if (!evaluate)
5048     {
5049 	*arg = p + 1;
5050 	return OK;
5051     }
5052 
5053     /*
5054      * Copy the string into allocated memory, handling '' to ' reduction.
5055      */
5056     str = alloc((unsigned)((p - *arg) - reduce));
5057     if (str == NULL)
5058 	return FAIL;
5059     rettv->v_type = VAR_STRING;
5060     rettv->vval.v_string = str;
5061 
5062     for (p = *arg + 1; *p != NUL; )
5063     {
5064 	if (*p == '\'')
5065 	{
5066 	    if (p[1] != '\'')
5067 		break;
5068 	    ++p;
5069 	}
5070 	MB_COPY_CHAR(p, str);
5071     }
5072     *str = NUL;
5073     *arg = p + 1;
5074 
5075     return OK;
5076 }
5077 
5078 /*
5079  * Allocate a variable for a List and fill it from "*arg".
5080  * Return OK or FAIL.
5081  */
5082     static int
5083 get_list_tv(arg, rettv, evaluate)
5084     char_u	**arg;
5085     typval_T	*rettv;
5086     int		evaluate;
5087 {
5088     list_T	*l = NULL;
5089     typval_T	tv;
5090     listitem_T	*item;
5091 
5092     if (evaluate)
5093     {
5094 	l = list_alloc();
5095 	if (l == NULL)
5096 	    return FAIL;
5097     }
5098 
5099     *arg = skipwhite(*arg + 1);
5100     while (**arg != ']' && **arg != NUL)
5101     {
5102 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5103 	    goto failret;
5104 	if (evaluate)
5105 	{
5106 	    item = listitem_alloc();
5107 	    if (item != NULL)
5108 	    {
5109 		item->li_tv = tv;
5110 		item->li_tv.v_lock = 0;
5111 		list_append(l, item);
5112 	    }
5113 	    else
5114 		clear_tv(&tv);
5115 	}
5116 
5117 	if (**arg == ']')
5118 	    break;
5119 	if (**arg != ',')
5120 	{
5121 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5122 	    goto failret;
5123 	}
5124 	*arg = skipwhite(*arg + 1);
5125     }
5126 
5127     if (**arg != ']')
5128     {
5129 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5130 failret:
5131 	if (evaluate)
5132 	    list_free(l);
5133 	return FAIL;
5134     }
5135 
5136     *arg = skipwhite(*arg + 1);
5137     if (evaluate)
5138     {
5139 	rettv->v_type = VAR_LIST;
5140 	rettv->vval.v_list = l;
5141 	++l->lv_refcount;
5142     }
5143 
5144     return OK;
5145 }
5146 
5147 /*
5148  * Allocate an empty header for a list.
5149  */
5150     static list_T *
5151 list_alloc()
5152 {
5153     list_T  *l;
5154 
5155     l = (list_T *)alloc_clear(sizeof(list_T));
5156     if (l != NULL)
5157     {
5158 	/* Prepend the list to the list of lists for garbage collection. */
5159 	if (first_list != NULL)
5160 	    first_list->lv_used_prev = l;
5161 	l->lv_used_prev = NULL;
5162 	l->lv_used_next = first_list;
5163 	first_list = l;
5164     }
5165     return l;
5166 }
5167 
5168 /*
5169  * Unreference a list: decrement the reference count and free it when it
5170  * becomes zero.
5171  */
5172     void
5173 list_unref(l)
5174     list_T *l;
5175 {
5176     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5177 	list_free(l);
5178 }
5179 
5180 /*
5181  * Free a list, including all items it points to.
5182  * Ignores the reference count.
5183  */
5184     static void
5185 list_free(l)
5186     list_T *l;
5187 {
5188     listitem_T *item;
5189 
5190     /* Avoid that recursive reference to the list frees us again. */
5191     l->lv_refcount = DEL_REFCOUNT;
5192 
5193     /* Remove the list from the list of lists for garbage collection. */
5194     if (l->lv_used_prev == NULL)
5195 	first_list = l->lv_used_next;
5196     else
5197 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5198     if (l->lv_used_next != NULL)
5199 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5200 
5201     for (item = l->lv_first; item != NULL; item = l->lv_first)
5202     {
5203 	/* Remove the item before deleting it. */
5204 	l->lv_first = item->li_next;
5205 	listitem_free(item);
5206     }
5207     vim_free(l);
5208 }
5209 
5210 /*
5211  * Allocate a list item.
5212  */
5213     static listitem_T *
5214 listitem_alloc()
5215 {
5216     return (listitem_T *)alloc(sizeof(listitem_T));
5217 }
5218 
5219 /*
5220  * Free a list item.  Also clears the value.  Does not notify watchers.
5221  */
5222     static void
5223 listitem_free(item)
5224     listitem_T *item;
5225 {
5226     clear_tv(&item->li_tv);
5227     vim_free(item);
5228 }
5229 
5230 /*
5231  * Remove a list item from a List and free it.  Also clears the value.
5232  */
5233     static void
5234 listitem_remove(l, item)
5235     list_T  *l;
5236     listitem_T *item;
5237 {
5238     list_remove(l, item, item);
5239     listitem_free(item);
5240 }
5241 
5242 /*
5243  * Get the number of items in a list.
5244  */
5245     static long
5246 list_len(l)
5247     list_T	*l;
5248 {
5249     if (l == NULL)
5250 	return 0L;
5251     return l->lv_len;
5252 }
5253 
5254 /*
5255  * Return TRUE when two lists have exactly the same values.
5256  */
5257     static int
5258 list_equal(l1, l2, ic)
5259     list_T	*l1;
5260     list_T	*l2;
5261     int		ic;	/* ignore case for strings */
5262 {
5263     listitem_T	*item1, *item2;
5264 
5265     if (list_len(l1) != list_len(l2))
5266 	return FALSE;
5267 
5268     for (item1 = l1->lv_first, item2 = l2->lv_first;
5269 	    item1 != NULL && item2 != NULL;
5270 			       item1 = item1->li_next, item2 = item2->li_next)
5271 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5272 	    return FALSE;
5273     return item1 == NULL && item2 == NULL;
5274 }
5275 
5276 /*
5277  * Return TRUE when two dictionaries have exactly the same key/values.
5278  */
5279     static int
5280 dict_equal(d1, d2, ic)
5281     dict_T	*d1;
5282     dict_T	*d2;
5283     int		ic;	/* ignore case for strings */
5284 {
5285     hashitem_T	*hi;
5286     dictitem_T	*item2;
5287     int		todo;
5288 
5289     if (dict_len(d1) != dict_len(d2))
5290 	return FALSE;
5291 
5292     todo = d1->dv_hashtab.ht_used;
5293     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5294     {
5295 	if (!HASHITEM_EMPTY(hi))
5296 	{
5297 	    item2 = dict_find(d2, hi->hi_key, -1);
5298 	    if (item2 == NULL)
5299 		return FALSE;
5300 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5301 		return FALSE;
5302 	    --todo;
5303 	}
5304     }
5305     return TRUE;
5306 }
5307 
5308 /*
5309  * Return TRUE if "tv1" and "tv2" have the same value.
5310  * Compares the items just like "==" would compare them, but strings and
5311  * numbers are different.
5312  */
5313     static int
5314 tv_equal(tv1, tv2, ic)
5315     typval_T *tv1;
5316     typval_T *tv2;
5317     int	    ic;	    /* ignore case */
5318 {
5319     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5320     char_u	*s1, *s2;
5321 
5322     if (tv1->v_type != tv2->v_type)
5323 	return FALSE;
5324 
5325     switch (tv1->v_type)
5326     {
5327 	case VAR_LIST:
5328 	    /* recursive! */
5329 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5330 
5331 	case VAR_DICT:
5332 	    /* recursive! */
5333 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5334 
5335 	case VAR_FUNC:
5336 	    return (tv1->vval.v_string != NULL
5337 		    && tv2->vval.v_string != NULL
5338 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5339 
5340 	case VAR_NUMBER:
5341 	    return tv1->vval.v_number == tv2->vval.v_number;
5342 
5343 	case VAR_STRING:
5344 	    s1 = get_tv_string_buf(tv1, buf1);
5345 	    s2 = get_tv_string_buf(tv2, buf2);
5346 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5347     }
5348 
5349     EMSG2(_(e_intern2), "tv_equal()");
5350     return TRUE;
5351 }
5352 
5353 /*
5354  * Locate item with index "n" in list "l" and return it.
5355  * A negative index is counted from the end; -1 is the last item.
5356  * Returns NULL when "n" is out of range.
5357  */
5358     static listitem_T *
5359 list_find(l, n)
5360     list_T	*l;
5361     long	n;
5362 {
5363     listitem_T	*item;
5364     long	idx;
5365 
5366     if (l == NULL)
5367 	return NULL;
5368 
5369     /* Negative index is relative to the end. */
5370     if (n < 0)
5371 	n = l->lv_len + n;
5372 
5373     /* Check for index out of range. */
5374     if (n < 0 || n >= l->lv_len)
5375 	return NULL;
5376 
5377     /* When there is a cached index may start search from there. */
5378     if (l->lv_idx_item != NULL)
5379     {
5380 	if (n < l->lv_idx / 2)
5381 	{
5382 	    /* closest to the start of the list */
5383 	    item = l->lv_first;
5384 	    idx = 0;
5385 	}
5386 	else if (n > (l->lv_idx + l->lv_len) / 2)
5387 	{
5388 	    /* closest to the end of the list */
5389 	    item = l->lv_last;
5390 	    idx = l->lv_len - 1;
5391 	}
5392 	else
5393 	{
5394 	    /* closest to the cached index */
5395 	    item = l->lv_idx_item;
5396 	    idx = l->lv_idx;
5397 	}
5398     }
5399     else
5400     {
5401 	if (n < l->lv_len / 2)
5402 	{
5403 	    /* closest to the start of the list */
5404 	    item = l->lv_first;
5405 	    idx = 0;
5406 	}
5407 	else
5408 	{
5409 	    /* closest to the end of the list */
5410 	    item = l->lv_last;
5411 	    idx = l->lv_len - 1;
5412 	}
5413     }
5414 
5415     while (n > idx)
5416     {
5417 	/* search forward */
5418 	item = item->li_next;
5419 	++idx;
5420     }
5421     while (n < idx)
5422     {
5423 	/* search backward */
5424 	item = item->li_prev;
5425 	--idx;
5426     }
5427 
5428     /* cache the used index */
5429     l->lv_idx = idx;
5430     l->lv_idx_item = item;
5431 
5432     return item;
5433 }
5434 
5435 /*
5436  * Locate "item" list "l" and return its index.
5437  * Returns -1 when "item" is not in the list.
5438  */
5439     static long
5440 list_idx_of_item(l, item)
5441     list_T	*l;
5442     listitem_T	*item;
5443 {
5444     long	idx = 0;
5445     listitem_T	*li;
5446 
5447     if (l == NULL)
5448 	return -1;
5449     idx = 0;
5450     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5451 	++idx;
5452     if (li == NULL)
5453 	return -1;
5454     return idx;
5455 }
5456 
5457 /*
5458  * Append item "item" to the end of list "l".
5459  */
5460     static void
5461 list_append(l, item)
5462     list_T	*l;
5463     listitem_T	*item;
5464 {
5465     if (l->lv_last == NULL)
5466     {
5467 	/* empty list */
5468 	l->lv_first = item;
5469 	l->lv_last = item;
5470 	item->li_prev = NULL;
5471     }
5472     else
5473     {
5474 	l->lv_last->li_next = item;
5475 	item->li_prev = l->lv_last;
5476 	l->lv_last = item;
5477     }
5478     ++l->lv_len;
5479     item->li_next = NULL;
5480 }
5481 
5482 /*
5483  * Append typval_T "tv" to the end of list "l".
5484  * Return FAIL when out of memory.
5485  */
5486     static int
5487 list_append_tv(l, tv)
5488     list_T	*l;
5489     typval_T	*tv;
5490 {
5491     listitem_T	*li = listitem_alloc();
5492 
5493     if (li == NULL)
5494 	return FAIL;
5495     copy_tv(tv, &li->li_tv);
5496     list_append(l, li);
5497     return OK;
5498 }
5499 
5500 /*
5501  * Add a dictionary to a list.  Used by getqflist().
5502  * Return FAIL when out of memory.
5503  */
5504     int
5505 list_append_dict(list, dict)
5506     list_T	*list;
5507     dict_T	*dict;
5508 {
5509     listitem_T	*li = listitem_alloc();
5510 
5511     if (li == NULL)
5512 	return FAIL;
5513     li->li_tv.v_type = VAR_DICT;
5514     li->li_tv.v_lock = 0;
5515     li->li_tv.vval.v_dict = dict;
5516     list_append(list, li);
5517     ++dict->dv_refcount;
5518     return OK;
5519 }
5520 
5521 /*
5522  * Insert typval_T "tv" in list "l" before "item".
5523  * If "item" is NULL append at the end.
5524  * Return FAIL when out of memory.
5525  */
5526     static int
5527 list_insert_tv(l, tv, item)
5528     list_T	*l;
5529     typval_T	*tv;
5530     listitem_T	*item;
5531 {
5532     listitem_T	*ni = listitem_alloc();
5533 
5534     if (ni == NULL)
5535 	return FAIL;
5536     copy_tv(tv, &ni->li_tv);
5537     if (item == NULL)
5538 	/* Append new item at end of list. */
5539 	list_append(l, ni);
5540     else
5541     {
5542 	/* Insert new item before existing item. */
5543 	ni->li_prev = item->li_prev;
5544 	ni->li_next = item;
5545 	if (item->li_prev == NULL)
5546 	{
5547 	    l->lv_first = ni;
5548 	    ++l->lv_idx;
5549 	}
5550 	else
5551 	{
5552 	    item->li_prev->li_next = ni;
5553 	    l->lv_idx_item = NULL;
5554 	}
5555 	item->li_prev = ni;
5556 	++l->lv_len;
5557     }
5558     return OK;
5559 }
5560 
5561 /*
5562  * Extend "l1" with "l2".
5563  * If "bef" is NULL append at the end, otherwise insert before this item.
5564  * Returns FAIL when out of memory.
5565  */
5566     static int
5567 list_extend(l1, l2, bef)
5568     list_T	*l1;
5569     list_T	*l2;
5570     listitem_T	*bef;
5571 {
5572     listitem_T	*item;
5573 
5574     for (item = l2->lv_first; item != NULL; item = item->li_next)
5575 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5576 	    return FAIL;
5577     return OK;
5578 }
5579 
5580 /*
5581  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5582  * Return FAIL when out of memory.
5583  */
5584     static int
5585 list_concat(l1, l2, tv)
5586     list_T	*l1;
5587     list_T	*l2;
5588     typval_T	*tv;
5589 {
5590     list_T	*l;
5591 
5592     /* make a copy of the first list. */
5593     l = list_copy(l1, FALSE, 0);
5594     if (l == NULL)
5595 	return FAIL;
5596     tv->v_type = VAR_LIST;
5597     tv->vval.v_list = l;
5598 
5599     /* append all items from the second list */
5600     return list_extend(l, l2, NULL);
5601 }
5602 
5603 /*
5604  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5605  * The refcount of the new list is set to 1.
5606  * See item_copy() for "copyID".
5607  * Returns NULL when out of memory.
5608  */
5609     static list_T *
5610 list_copy(orig, deep, copyID)
5611     list_T	*orig;
5612     int		deep;
5613     int		copyID;
5614 {
5615     list_T	*copy;
5616     listitem_T	*item;
5617     listitem_T	*ni;
5618 
5619     if (orig == NULL)
5620 	return NULL;
5621 
5622     copy = list_alloc();
5623     if (copy != NULL)
5624     {
5625 	if (copyID != 0)
5626 	{
5627 	    /* Do this before adding the items, because one of the items may
5628 	     * refer back to this list. */
5629 	    orig->lv_copyID = copyID;
5630 	    orig->lv_copylist = copy;
5631 	}
5632 	for (item = orig->lv_first; item != NULL && !got_int;
5633 							 item = item->li_next)
5634 	{
5635 	    ni = listitem_alloc();
5636 	    if (ni == NULL)
5637 		break;
5638 	    if (deep)
5639 	    {
5640 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5641 		{
5642 		    vim_free(ni);
5643 		    break;
5644 		}
5645 	    }
5646 	    else
5647 		copy_tv(&item->li_tv, &ni->li_tv);
5648 	    list_append(copy, ni);
5649 	}
5650 	++copy->lv_refcount;
5651 	if (item != NULL)
5652 	{
5653 	    list_unref(copy);
5654 	    copy = NULL;
5655 	}
5656     }
5657 
5658     return copy;
5659 }
5660 
5661 /*
5662  * Remove items "item" to "item2" from list "l".
5663  * Does not free the listitem or the value!
5664  */
5665     static void
5666 list_remove(l, item, item2)
5667     list_T	*l;
5668     listitem_T	*item;
5669     listitem_T	*item2;
5670 {
5671     listitem_T	*ip;
5672 
5673     /* notify watchers */
5674     for (ip = item; ip != NULL; ip = ip->li_next)
5675     {
5676 	--l->lv_len;
5677 	list_fix_watch(l, ip);
5678 	if (ip == item2)
5679 	    break;
5680     }
5681 
5682     if (item2->li_next == NULL)
5683 	l->lv_last = item->li_prev;
5684     else
5685 	item2->li_next->li_prev = item->li_prev;
5686     if (item->li_prev == NULL)
5687 	l->lv_first = item2->li_next;
5688     else
5689 	item->li_prev->li_next = item2->li_next;
5690     l->lv_idx_item = NULL;
5691 }
5692 
5693 /*
5694  * Return an allocated string with the string representation of a list.
5695  * May return NULL.
5696  */
5697     static char_u *
5698 list2string(tv)
5699     typval_T	*tv;
5700 {
5701     garray_T	ga;
5702 
5703     if (tv->vval.v_list == NULL)
5704 	return NULL;
5705     ga_init2(&ga, (int)sizeof(char), 80);
5706     ga_append(&ga, '[');
5707     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE) == FAIL)
5708     {
5709 	vim_free(ga.ga_data);
5710 	return NULL;
5711     }
5712     ga_append(&ga, ']');
5713     ga_append(&ga, NUL);
5714     return (char_u *)ga.ga_data;
5715 }
5716 
5717 /*
5718  * Join list "l" into a string in "*gap", using separator "sep".
5719  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5720  * Return FAIL or OK.
5721  */
5722     static int
5723 list_join(gap, l, sep, echo)
5724     garray_T	*gap;
5725     list_T	*l;
5726     char_u	*sep;
5727     int		echo;
5728 {
5729     int		first = TRUE;
5730     char_u	*tofree;
5731     char_u	numbuf[NUMBUFLEN];
5732     listitem_T	*item;
5733     char_u	*s;
5734 
5735     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5736     {
5737 	if (first)
5738 	    first = FALSE;
5739 	else
5740 	    ga_concat(gap, sep);
5741 
5742 	if (echo)
5743 	    s = echo_string(&item->li_tv, &tofree, numbuf);
5744 	else
5745 	    s = tv2string(&item->li_tv, &tofree, numbuf);
5746 	if (s != NULL)
5747 	    ga_concat(gap, s);
5748 	vim_free(tofree);
5749 	if (s == NULL)
5750 	    return FAIL;
5751     }
5752     return OK;
5753 }
5754 
5755 /*
5756  * Garbage collection for lists and dictionaries.
5757  *
5758  * We use reference counts to be able to free most items right away when they
5759  * are no longer used.  But for composite items it's possible that it becomes
5760  * unused while the reference count is > 0: When there is a recursive
5761  * reference.  Example:
5762  *	:let l = [1, 2, 3]
5763  *	:let d = {9: l}
5764  *	:let l[1] = d
5765  *
5766  * Since this is quite unusual we handle this with garbage collection: every
5767  * once in a while find out which lists and dicts are not referenced from any
5768  * variable.
5769  *
5770  * Here is a good reference text about garbage collection (refers to Python
5771  * but it applies to all reference-counting mechanisms):
5772  *	http://python.ca/nas/python/gc/
5773  */
5774 
5775 /*
5776  * Do garbage collection for lists and dicts.
5777  * Return TRUE if some memory was freed.
5778  */
5779     int
5780 garbage_collect()
5781 {
5782     dict_T	*dd;
5783     list_T	*ll;
5784     int		copyID = ++current_copyID;
5785     buf_T	*buf;
5786     win_T	*wp;
5787     int		i;
5788     funccall_T	*fc;
5789     int		did_free = FALSE;
5790 
5791     /*
5792      * 1. Go through all accessible variables and mark all lists and dicts
5793      *    with copyID.
5794      */
5795     /* script-local variables */
5796     for (i = 1; i <= ga_scripts.ga_len; ++i)
5797 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5798 
5799     /* buffer-local variables */
5800     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5801 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5802 
5803     /* window-local variables */
5804     FOR_ALL_WINDOWS(wp)
5805 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5806 
5807     /* global variables */
5808     set_ref_in_ht(&globvarht, copyID);
5809 
5810     /* function-local variables */
5811     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5812     {
5813 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5814 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5815     }
5816 
5817     /*
5818      * 2. Go through the list of dicts and free items without the copyID.
5819      */
5820     for (dd = first_dict; dd != NULL; )
5821 	if (dd->dv_copyID != copyID)
5822 	{
5823 	    dict_free(dd);
5824 	    did_free = TRUE;
5825 
5826 	    /* restart, next dict may also have been freed */
5827 	    dd = first_dict;
5828 	}
5829 	else
5830 	    dd = dd->dv_used_next;
5831 
5832     /*
5833      * 3. Go through the list of lists and free items without the copyID.
5834      */
5835     for (ll = first_list; ll != NULL; )
5836 	if (ll->lv_copyID != copyID)
5837 	{
5838 	    list_free(ll);
5839 	    did_free = TRUE;
5840 
5841 	    /* restart, next dict may also have been freed */
5842 	    ll = first_list;
5843 	}
5844 	else
5845 	    ll = ll->lv_used_next;
5846 
5847     return did_free;
5848 }
5849 
5850 /*
5851  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
5852  */
5853     static void
5854 set_ref_in_ht(ht, copyID)
5855     hashtab_T	*ht;
5856     int		copyID;
5857 {
5858     int		todo;
5859     hashitem_T	*hi;
5860 
5861     todo = ht->ht_used;
5862     for (hi = ht->ht_array; todo > 0; ++hi)
5863 	if (!HASHITEM_EMPTY(hi))
5864 	{
5865 	    --todo;
5866 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
5867 	}
5868 }
5869 
5870 /*
5871  * Mark all lists and dicts referenced through list "l" with "copyID".
5872  */
5873     static void
5874 set_ref_in_list(l, copyID)
5875     list_T	*l;
5876     int		copyID;
5877 {
5878     listitem_T *li;
5879 
5880     for (li = l->lv_first; li != NULL; li = li->li_next)
5881 	set_ref_in_item(&li->li_tv, copyID);
5882 }
5883 
5884 /*
5885  * Mark all lists and dicts referenced through typval "tv" with "copyID".
5886  */
5887     static void
5888 set_ref_in_item(tv, copyID)
5889     typval_T	*tv;
5890     int		copyID;
5891 {
5892     dict_T	*dd;
5893     list_T	*ll;
5894 
5895     switch (tv->v_type)
5896     {
5897 	case VAR_DICT:
5898 	    dd = tv->vval.v_dict;
5899 	    if (dd->dv_copyID != copyID)
5900 	    {
5901 		/* Didn't see this dict yet. */
5902 		dd->dv_copyID = copyID;
5903 		set_ref_in_ht(&dd->dv_hashtab, copyID);
5904 	    }
5905 	    break;
5906 
5907 	case VAR_LIST:
5908 	    ll = tv->vval.v_list;
5909 	    if (ll->lv_copyID != copyID)
5910 	    {
5911 		/* Didn't see this list yet. */
5912 		ll->lv_copyID = copyID;
5913 		set_ref_in_list(ll, copyID);
5914 	    }
5915 	    break;
5916     }
5917     return;
5918 }
5919 
5920 /*
5921  * Allocate an empty header for a dictionary.
5922  */
5923     dict_T *
5924 dict_alloc()
5925 {
5926     dict_T *d;
5927 
5928     d = (dict_T *)alloc(sizeof(dict_T));
5929     if (d != NULL)
5930     {
5931 	/* Add the list to the hashtable for garbage collection. */
5932 	if (first_dict != NULL)
5933 	    first_dict->dv_used_prev = d;
5934 	d->dv_used_next = first_dict;
5935 	d->dv_used_prev = NULL;
5936 
5937 	hash_init(&d->dv_hashtab);
5938 	d->dv_lock = 0;
5939 	d->dv_refcount = 0;
5940 	d->dv_copyID = 0;
5941     }
5942     return d;
5943 }
5944 
5945 /*
5946  * Unreference a Dictionary: decrement the reference count and free it when it
5947  * becomes zero.
5948  */
5949     static void
5950 dict_unref(d)
5951     dict_T *d;
5952 {
5953     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
5954 	dict_free(d);
5955 }
5956 
5957 /*
5958  * Free a Dictionary, including all items it contains.
5959  * Ignores the reference count.
5960  */
5961     static void
5962 dict_free(d)
5963     dict_T *d;
5964 {
5965     int		todo;
5966     hashitem_T	*hi;
5967     dictitem_T	*di;
5968 
5969     /* Avoid that recursive reference to the dict frees us again. */
5970     d->dv_refcount = DEL_REFCOUNT;
5971 
5972     /* Remove the dict from the list of dicts for garbage collection. */
5973     if (d->dv_used_prev == NULL)
5974 	first_dict = d->dv_used_next;
5975     else
5976 	d->dv_used_prev->dv_used_next = d->dv_used_next;
5977     if (d->dv_used_next != NULL)
5978 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
5979 
5980     /* Lock the hashtab, we don't want it to resize while freeing items. */
5981     hash_lock(&d->dv_hashtab);
5982     todo = d->dv_hashtab.ht_used;
5983     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
5984     {
5985 	if (!HASHITEM_EMPTY(hi))
5986 	{
5987 	    /* Remove the item before deleting it, just in case there is
5988 	     * something recursive causing trouble. */
5989 	    di = HI2DI(hi);
5990 	    hash_remove(&d->dv_hashtab, hi);
5991 	    dictitem_free(di);
5992 	    --todo;
5993 	}
5994     }
5995     hash_clear(&d->dv_hashtab);
5996     vim_free(d);
5997 }
5998 
5999 /*
6000  * Allocate a Dictionary item.
6001  * The "key" is copied to the new item.
6002  * Note that the value of the item "di_tv" still needs to be initialized!
6003  * Returns NULL when out of memory.
6004  */
6005     static dictitem_T *
6006 dictitem_alloc(key)
6007     char_u	*key;
6008 {
6009     dictitem_T *di;
6010 
6011     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6012     if (di != NULL)
6013     {
6014 	STRCPY(di->di_key, key);
6015 	di->di_flags = 0;
6016     }
6017     return di;
6018 }
6019 
6020 /*
6021  * Make a copy of a Dictionary item.
6022  */
6023     static dictitem_T *
6024 dictitem_copy(org)
6025     dictitem_T *org;
6026 {
6027     dictitem_T *di;
6028 
6029     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6030     if (di != NULL)
6031     {
6032 	STRCPY(di->di_key, org->di_key);
6033 	di->di_flags = 0;
6034 	copy_tv(&org->di_tv, &di->di_tv);
6035     }
6036     return di;
6037 }
6038 
6039 /*
6040  * Remove item "item" from Dictionary "dict" and free it.
6041  */
6042     static void
6043 dictitem_remove(dict, item)
6044     dict_T	*dict;
6045     dictitem_T	*item;
6046 {
6047     hashitem_T	*hi;
6048 
6049     hi = hash_find(&dict->dv_hashtab, item->di_key);
6050     if (HASHITEM_EMPTY(hi))
6051 	EMSG2(_(e_intern2), "dictitem_remove()");
6052     else
6053 	hash_remove(&dict->dv_hashtab, hi);
6054     dictitem_free(item);
6055 }
6056 
6057 /*
6058  * Free a dict item.  Also clears the value.
6059  */
6060     static void
6061 dictitem_free(item)
6062     dictitem_T *item;
6063 {
6064     clear_tv(&item->di_tv);
6065     vim_free(item);
6066 }
6067 
6068 /*
6069  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6070  * The refcount of the new dict is set to 1.
6071  * See item_copy() for "copyID".
6072  * Returns NULL when out of memory.
6073  */
6074     static dict_T *
6075 dict_copy(orig, deep, copyID)
6076     dict_T	*orig;
6077     int		deep;
6078     int		copyID;
6079 {
6080     dict_T	*copy;
6081     dictitem_T	*di;
6082     int		todo;
6083     hashitem_T	*hi;
6084 
6085     if (orig == NULL)
6086 	return NULL;
6087 
6088     copy = dict_alloc();
6089     if (copy != NULL)
6090     {
6091 	if (copyID != 0)
6092 	{
6093 	    orig->dv_copyID = copyID;
6094 	    orig->dv_copydict = copy;
6095 	}
6096 	todo = orig->dv_hashtab.ht_used;
6097 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6098 	{
6099 	    if (!HASHITEM_EMPTY(hi))
6100 	    {
6101 		--todo;
6102 
6103 		di = dictitem_alloc(hi->hi_key);
6104 		if (di == NULL)
6105 		    break;
6106 		if (deep)
6107 		{
6108 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6109 							      copyID) == FAIL)
6110 		    {
6111 			vim_free(di);
6112 			break;
6113 		    }
6114 		}
6115 		else
6116 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6117 		if (dict_add(copy, di) == FAIL)
6118 		{
6119 		    dictitem_free(di);
6120 		    break;
6121 		}
6122 	    }
6123 	}
6124 
6125 	++copy->dv_refcount;
6126 	if (todo > 0)
6127 	{
6128 	    dict_unref(copy);
6129 	    copy = NULL;
6130 	}
6131     }
6132 
6133     return copy;
6134 }
6135 
6136 /*
6137  * Add item "item" to Dictionary "d".
6138  * Returns FAIL when out of memory and when key already existed.
6139  */
6140     static int
6141 dict_add(d, item)
6142     dict_T	*d;
6143     dictitem_T	*item;
6144 {
6145     return hash_add(&d->dv_hashtab, item->di_key);
6146 }
6147 
6148 /*
6149  * Add a number or string entry to dictionary "d".
6150  * When "str" is NULL use number "nr", otherwise use "str".
6151  * Returns FAIL when out of memory and when key already exists.
6152  */
6153     int
6154 dict_add_nr_str(d, key, nr, str)
6155     dict_T	*d;
6156     char	*key;
6157     long	nr;
6158     char_u	*str;
6159 {
6160     dictitem_T	*item;
6161 
6162     item = dictitem_alloc((char_u *)key);
6163     if (item == NULL)
6164 	return FAIL;
6165     item->di_tv.v_lock = 0;
6166     if (str == NULL)
6167     {
6168 	item->di_tv.v_type = VAR_NUMBER;
6169 	item->di_tv.vval.v_number = nr;
6170     }
6171     else
6172     {
6173 	item->di_tv.v_type = VAR_STRING;
6174 	item->di_tv.vval.v_string = vim_strsave(str);
6175     }
6176     if (dict_add(d, item) == FAIL)
6177     {
6178 	dictitem_free(item);
6179 	return FAIL;
6180     }
6181     return OK;
6182 }
6183 
6184 /*
6185  * Get the number of items in a Dictionary.
6186  */
6187     static long
6188 dict_len(d)
6189     dict_T	*d;
6190 {
6191     if (d == NULL)
6192 	return 0L;
6193     return d->dv_hashtab.ht_used;
6194 }
6195 
6196 /*
6197  * Find item "key[len]" in Dictionary "d".
6198  * If "len" is negative use strlen(key).
6199  * Returns NULL when not found.
6200  */
6201     static dictitem_T *
6202 dict_find(d, key, len)
6203     dict_T	*d;
6204     char_u	*key;
6205     int		len;
6206 {
6207 #define AKEYLEN 200
6208     char_u	buf[AKEYLEN];
6209     char_u	*akey;
6210     char_u	*tofree = NULL;
6211     hashitem_T	*hi;
6212 
6213     if (len < 0)
6214 	akey = key;
6215     else if (len >= AKEYLEN)
6216     {
6217 	tofree = akey = vim_strnsave(key, len);
6218 	if (akey == NULL)
6219 	    return NULL;
6220     }
6221     else
6222     {
6223 	/* Avoid a malloc/free by using buf[]. */
6224 	vim_strncpy(buf, key, len);
6225 	akey = buf;
6226     }
6227 
6228     hi = hash_find(&d->dv_hashtab, akey);
6229     vim_free(tofree);
6230     if (HASHITEM_EMPTY(hi))
6231 	return NULL;
6232     return HI2DI(hi);
6233 }
6234 
6235 /*
6236  * Get a string item from a dictionary in allocated memory.
6237  * Returns NULL if the entry doesn't exist or out of memory.
6238  */
6239     char_u *
6240 get_dict_string(d, key)
6241     dict_T	*d;
6242     char_u	*key;
6243 {
6244     dictitem_T	*di;
6245 
6246     di = dict_find(d, key, -1);
6247     if (di == NULL)
6248 	return NULL;
6249     return vim_strsave(get_tv_string(&di->di_tv));
6250 }
6251 
6252 /*
6253  * Get a number item from a dictionary.
6254  * Returns 0 if the entry doesn't exist or out of memory.
6255  */
6256     long
6257 get_dict_number(d, key)
6258     dict_T	*d;
6259     char_u	*key;
6260 {
6261     dictitem_T	*di;
6262 
6263     di = dict_find(d, key, -1);
6264     if (di == NULL)
6265 	return 0;
6266     return get_tv_number(&di->di_tv);
6267 }
6268 
6269 /*
6270  * Return an allocated string with the string representation of a Dictionary.
6271  * May return NULL.
6272  */
6273     static char_u *
6274 dict2string(tv)
6275     typval_T	*tv;
6276 {
6277     garray_T	ga;
6278     int		first = TRUE;
6279     char_u	*tofree;
6280     char_u	numbuf[NUMBUFLEN];
6281     hashitem_T	*hi;
6282     char_u	*s;
6283     dict_T	*d;
6284     int		todo;
6285 
6286     if ((d = tv->vval.v_dict) == NULL)
6287 	return NULL;
6288     ga_init2(&ga, (int)sizeof(char), 80);
6289     ga_append(&ga, '{');
6290 
6291     todo = d->dv_hashtab.ht_used;
6292     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6293     {
6294 	if (!HASHITEM_EMPTY(hi))
6295 	{
6296 	    --todo;
6297 
6298 	    if (first)
6299 		first = FALSE;
6300 	    else
6301 		ga_concat(&ga, (char_u *)", ");
6302 
6303 	    tofree = string_quote(hi->hi_key, FALSE);
6304 	    if (tofree != NULL)
6305 	    {
6306 		ga_concat(&ga, tofree);
6307 		vim_free(tofree);
6308 	    }
6309 	    ga_concat(&ga, (char_u *)": ");
6310 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf);
6311 	    if (s != NULL)
6312 		ga_concat(&ga, s);
6313 	    vim_free(tofree);
6314 	    if (s == NULL)
6315 		break;
6316 	}
6317     }
6318     if (todo > 0)
6319     {
6320 	vim_free(ga.ga_data);
6321 	return NULL;
6322     }
6323 
6324     ga_append(&ga, '}');
6325     ga_append(&ga, NUL);
6326     return (char_u *)ga.ga_data;
6327 }
6328 
6329 /*
6330  * Allocate a variable for a Dictionary and fill it from "*arg".
6331  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6332  */
6333     static int
6334 get_dict_tv(arg, rettv, evaluate)
6335     char_u	**arg;
6336     typval_T	*rettv;
6337     int		evaluate;
6338 {
6339     dict_T	*d = NULL;
6340     typval_T	tvkey;
6341     typval_T	tv;
6342     char_u	*key;
6343     dictitem_T	*item;
6344     char_u	*start = skipwhite(*arg + 1);
6345     char_u	buf[NUMBUFLEN];
6346 
6347     /*
6348      * First check if it's not a curly-braces thing: {expr}.
6349      * Must do this without evaluating, otherwise a function may be called
6350      * twice.  Unfortunately this means we need to call eval1() twice for the
6351      * first item.
6352      * But {} is an empty Dictionary.
6353      */
6354     if (*start != '}')
6355     {
6356 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6357 	    return FAIL;
6358 	if (*start == '}')
6359 	    return NOTDONE;
6360     }
6361 
6362     if (evaluate)
6363     {
6364 	d = dict_alloc();
6365 	if (d == NULL)
6366 	    return FAIL;
6367     }
6368     tvkey.v_type = VAR_UNKNOWN;
6369     tv.v_type = VAR_UNKNOWN;
6370 
6371     *arg = skipwhite(*arg + 1);
6372     while (**arg != '}' && **arg != NUL)
6373     {
6374 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6375 	    goto failret;
6376 	if (**arg != ':')
6377 	{
6378 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6379 	    clear_tv(&tvkey);
6380 	    goto failret;
6381 	}
6382 	key = get_tv_string_buf_chk(&tvkey, buf);
6383 	if (key == NULL || *key == NUL)
6384 	{
6385 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6386 	    if (key != NULL)
6387 		EMSG(_(e_emptykey));
6388 	    clear_tv(&tvkey);
6389 	    goto failret;
6390 	}
6391 
6392 	*arg = skipwhite(*arg + 1);
6393 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6394 	{
6395 	    clear_tv(&tvkey);
6396 	    goto failret;
6397 	}
6398 	if (evaluate)
6399 	{
6400 	    item = dict_find(d, key, -1);
6401 	    if (item != NULL)
6402 	    {
6403 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6404 		clear_tv(&tvkey);
6405 		clear_tv(&tv);
6406 		goto failret;
6407 	    }
6408 	    item = dictitem_alloc(key);
6409 	    clear_tv(&tvkey);
6410 	    if (item != NULL)
6411 	    {
6412 		item->di_tv = tv;
6413 		item->di_tv.v_lock = 0;
6414 		if (dict_add(d, item) == FAIL)
6415 		    dictitem_free(item);
6416 	    }
6417 	}
6418 
6419 	if (**arg == '}')
6420 	    break;
6421 	if (**arg != ',')
6422 	{
6423 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6424 	    goto failret;
6425 	}
6426 	*arg = skipwhite(*arg + 1);
6427     }
6428 
6429     if (**arg != '}')
6430     {
6431 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6432 failret:
6433 	if (evaluate)
6434 	    dict_free(d);
6435 	return FAIL;
6436     }
6437 
6438     *arg = skipwhite(*arg + 1);
6439     if (evaluate)
6440     {
6441 	rettv->v_type = VAR_DICT;
6442 	rettv->vval.v_dict = d;
6443 	++d->dv_refcount;
6444     }
6445 
6446     return OK;
6447 }
6448 
6449 /*
6450  * Return a string with the string representation of a variable.
6451  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6452  * "numbuf" is used for a number.
6453  * Does not put quotes around strings, as ":echo" displays values.
6454  * May return NULL;
6455  */
6456     static char_u *
6457 echo_string(tv, tofree, numbuf)
6458     typval_T	*tv;
6459     char_u	**tofree;
6460     char_u	*numbuf;
6461 {
6462     static int	recurse = 0;
6463     char_u	*r = NULL;
6464 
6465     if (recurse >= DICT_MAXNEST)
6466     {
6467 	EMSG(_("E724: variable nested too deep for displaying"));
6468 	*tofree = NULL;
6469 	return NULL;
6470     }
6471     ++recurse;
6472 
6473     switch (tv->v_type)
6474     {
6475 	case VAR_FUNC:
6476 	    *tofree = NULL;
6477 	    r = tv->vval.v_string;
6478 	    break;
6479 	case VAR_LIST:
6480 	    *tofree = list2string(tv);
6481 	    r = *tofree;
6482 	    break;
6483 	case VAR_DICT:
6484 	    *tofree = dict2string(tv);
6485 	    r = *tofree;
6486 	    break;
6487 	case VAR_STRING:
6488 	case VAR_NUMBER:
6489 	    *tofree = NULL;
6490 	    r = get_tv_string_buf(tv, numbuf);
6491 	    break;
6492 	default:
6493 	    EMSG2(_(e_intern2), "echo_string()");
6494 	    *tofree = NULL;
6495     }
6496 
6497     --recurse;
6498     return r;
6499 }
6500 
6501 /*
6502  * Return a string with the string representation of a variable.
6503  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6504  * "numbuf" is used for a number.
6505  * Puts quotes around strings, so that they can be parsed back by eval().
6506  * May return NULL;
6507  */
6508     static char_u *
6509 tv2string(tv, tofree, numbuf)
6510     typval_T	*tv;
6511     char_u	**tofree;
6512     char_u	*numbuf;
6513 {
6514     switch (tv->v_type)
6515     {
6516 	case VAR_FUNC:
6517 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6518 	    return *tofree;
6519 	case VAR_STRING:
6520 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6521 	    return *tofree;
6522 	case VAR_NUMBER:
6523 	case VAR_LIST:
6524 	case VAR_DICT:
6525 	    break;
6526 	default:
6527 	    EMSG2(_(e_intern2), "tv2string()");
6528     }
6529     return echo_string(tv, tofree, numbuf);
6530 }
6531 
6532 /*
6533  * Return string "str" in ' quotes, doubling ' characters.
6534  * If "str" is NULL an empty string is assumed.
6535  * If "function" is TRUE make it function('string').
6536  */
6537     static char_u *
6538 string_quote(str, function)
6539     char_u	*str;
6540     int		function;
6541 {
6542     unsigned	len;
6543     char_u	*p, *r, *s;
6544 
6545     len = (function ? 13 : 3);
6546     if (str != NULL)
6547     {
6548 	len += STRLEN(str);
6549 	for (p = str; *p != NUL; mb_ptr_adv(p))
6550 	    if (*p == '\'')
6551 		++len;
6552     }
6553     s = r = alloc(len);
6554     if (r != NULL)
6555     {
6556 	if (function)
6557 	{
6558 	    STRCPY(r, "function('");
6559 	    r += 10;
6560 	}
6561 	else
6562 	    *r++ = '\'';
6563 	if (str != NULL)
6564 	    for (p = str; *p != NUL; )
6565 	    {
6566 		if (*p == '\'')
6567 		    *r++ = '\'';
6568 		MB_COPY_CHAR(p, r);
6569 	    }
6570 	*r++ = '\'';
6571 	if (function)
6572 	    *r++ = ')';
6573 	*r++ = NUL;
6574     }
6575     return s;
6576 }
6577 
6578 /*
6579  * Get the value of an environment variable.
6580  * "arg" is pointing to the '$'.  It is advanced to after the name.
6581  * If the environment variable was not set, silently assume it is empty.
6582  * Always return OK.
6583  */
6584     static int
6585 get_env_tv(arg, rettv, evaluate)
6586     char_u	**arg;
6587     typval_T	*rettv;
6588     int		evaluate;
6589 {
6590     char_u	*string = NULL;
6591     int		len;
6592     int		cc;
6593     char_u	*name;
6594     int		mustfree = FALSE;
6595 
6596     ++*arg;
6597     name = *arg;
6598     len = get_env_len(arg);
6599     if (evaluate)
6600     {
6601 	if (len != 0)
6602 	{
6603 	    cc = name[len];
6604 	    name[len] = NUL;
6605 	    /* first try vim_getenv(), fast for normal environment vars */
6606 	    string = vim_getenv(name, &mustfree);
6607 	    if (string != NULL && *string != NUL)
6608 	    {
6609 		if (!mustfree)
6610 		    string = vim_strsave(string);
6611 	    }
6612 	    else
6613 	    {
6614 		if (mustfree)
6615 		    vim_free(string);
6616 
6617 		/* next try expanding things like $VIM and ${HOME} */
6618 		string = expand_env_save(name - 1);
6619 		if (string != NULL && *string == '$')
6620 		{
6621 		    vim_free(string);
6622 		    string = NULL;
6623 		}
6624 	    }
6625 	    name[len] = cc;
6626 	}
6627 	rettv->v_type = VAR_STRING;
6628 	rettv->vval.v_string = string;
6629     }
6630 
6631     return OK;
6632 }
6633 
6634 /*
6635  * Array with names and number of arguments of all internal functions
6636  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6637  */
6638 static struct fst
6639 {
6640     char	*f_name;	/* function name */
6641     char	f_min_argc;	/* minimal number of arguments */
6642     char	f_max_argc;	/* maximal number of arguments */
6643     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6644 				/* implemenation of function */
6645 } functions[] =
6646 {
6647     {"add",		2, 2, f_add},
6648     {"append",		2, 2, f_append},
6649     {"argc",		0, 0, f_argc},
6650     {"argidx",		0, 0, f_argidx},
6651     {"argv",		1, 1, f_argv},
6652     {"browse",		4, 4, f_browse},
6653     {"browsedir",	2, 2, f_browsedir},
6654     {"bufexists",	1, 1, f_bufexists},
6655     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6656     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6657     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6658     {"buflisted",	1, 1, f_buflisted},
6659     {"bufloaded",	1, 1, f_bufloaded},
6660     {"bufname",		1, 1, f_bufname},
6661     {"bufnr",		1, 1, f_bufnr},
6662     {"bufwinnr",	1, 1, f_bufwinnr},
6663     {"byte2line",	1, 1, f_byte2line},
6664     {"byteidx",		2, 2, f_byteidx},
6665     {"call",		2, 3, f_call},
6666     {"char2nr",		1, 1, f_char2nr},
6667     {"cindent",		1, 1, f_cindent},
6668     {"col",		1, 1, f_col},
6669     {"confirm",		1, 4, f_confirm},
6670     {"copy",		1, 1, f_copy},
6671     {"count",		2, 4, f_count},
6672     {"cscope_connection",0,3, f_cscope_connection},
6673     {"cursor",		2, 2, f_cursor},
6674     {"deepcopy",	1, 2, f_deepcopy},
6675     {"delete",		1, 1, f_delete},
6676     {"did_filetype",	0, 0, f_did_filetype},
6677     {"diff_filler",	1, 1, f_diff_filler},
6678     {"diff_hlID",	2, 2, f_diff_hlID},
6679     {"empty",		1, 1, f_empty},
6680     {"escape",		2, 2, f_escape},
6681     {"eval",		1, 1, f_eval},
6682     {"eventhandler",	0, 0, f_eventhandler},
6683     {"executable",	1, 1, f_executable},
6684     {"exists",		1, 1, f_exists},
6685     {"expand",		1, 2, f_expand},
6686     {"extend",		2, 3, f_extend},
6687     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6688     {"filereadable",	1, 1, f_filereadable},
6689     {"filewritable",	1, 1, f_filewritable},
6690     {"filter",		2, 2, f_filter},
6691     {"finddir",		1, 3, f_finddir},
6692     {"findfile",	1, 3, f_findfile},
6693     {"fnamemodify",	2, 2, f_fnamemodify},
6694     {"foldclosed",	1, 1, f_foldclosed},
6695     {"foldclosedend",	1, 1, f_foldclosedend},
6696     {"foldlevel",	1, 1, f_foldlevel},
6697     {"foldtext",	0, 0, f_foldtext},
6698     {"foldtextresult",	1, 1, f_foldtextresult},
6699     {"foreground",	0, 0, f_foreground},
6700     {"function",	1, 1, f_function},
6701     {"garbagecollect",	0, 0, f_garbagecollect},
6702     {"get",		2, 3, f_get},
6703     {"getbufline",	2, 3, f_getbufline},
6704     {"getbufvar",	2, 2, f_getbufvar},
6705     {"getchar",		0, 1, f_getchar},
6706     {"getcharmod",	0, 0, f_getcharmod},
6707     {"getcmdline",	0, 0, f_getcmdline},
6708     {"getcmdpos",	0, 0, f_getcmdpos},
6709     {"getcwd",		0, 0, f_getcwd},
6710     {"getfontname",	0, 1, f_getfontname},
6711     {"getfperm",	1, 1, f_getfperm},
6712     {"getfsize",	1, 1, f_getfsize},
6713     {"getftime",	1, 1, f_getftime},
6714     {"getftype",	1, 1, f_getftype},
6715     {"getline",		1, 2, f_getline},
6716     {"getqflist",	0, 0, f_getqflist},
6717     {"getreg",		0, 2, f_getreg},
6718     {"getregtype",	0, 1, f_getregtype},
6719     {"getwinposx",	0, 0, f_getwinposx},
6720     {"getwinposy",	0, 0, f_getwinposy},
6721     {"getwinvar",	2, 2, f_getwinvar},
6722     {"glob",		1, 1, f_glob},
6723     {"globpath",	2, 2, f_globpath},
6724     {"has",		1, 1, f_has},
6725     {"has_key",		2, 2, f_has_key},
6726     {"hasmapto",	1, 2, f_hasmapto},
6727     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6728     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6729     {"histadd",		2, 2, f_histadd},
6730     {"histdel",		1, 2, f_histdel},
6731     {"histget",		1, 2, f_histget},
6732     {"histnr",		1, 1, f_histnr},
6733     {"hlID",		1, 1, f_hlID},
6734     {"hlexists",	1, 1, f_hlexists},
6735     {"hostname",	0, 0, f_hostname},
6736     {"iconv",		3, 3, f_iconv},
6737     {"indent",		1, 1, f_indent},
6738     {"index",		2, 4, f_index},
6739     {"input",		1, 2, f_input},
6740     {"inputdialog",	1, 3, f_inputdialog},
6741     {"inputrestore",	0, 0, f_inputrestore},
6742     {"inputsave",	0, 0, f_inputsave},
6743     {"inputsecret",	1, 2, f_inputsecret},
6744     {"insert",		2, 3, f_insert},
6745     {"isdirectory",	1, 1, f_isdirectory},
6746     {"islocked",	1, 1, f_islocked},
6747     {"items",		1, 1, f_items},
6748     {"join",		1, 2, f_join},
6749     {"keys",		1, 1, f_keys},
6750     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6751     {"len",		1, 1, f_len},
6752     {"libcall",		3, 3, f_libcall},
6753     {"libcallnr",	3, 3, f_libcallnr},
6754     {"line",		1, 1, f_line},
6755     {"line2byte",	1, 1, f_line2byte},
6756     {"lispindent",	1, 1, f_lispindent},
6757     {"localtime",	0, 0, f_localtime},
6758     {"map",		2, 2, f_map},
6759     {"maparg",		1, 2, f_maparg},
6760     {"mapcheck",	1, 2, f_mapcheck},
6761     {"match",		2, 4, f_match},
6762     {"matchend",	2, 4, f_matchend},
6763     {"matchlist",	2, 4, f_matchlist},
6764     {"matchstr",	2, 4, f_matchstr},
6765     {"max",		1, 1, f_max},
6766     {"min",		1, 1, f_min},
6767 #ifdef vim_mkdir
6768     {"mkdir",		1, 3, f_mkdir},
6769 #endif
6770     {"mode",		0, 0, f_mode},
6771     {"nextnonblank",	1, 1, f_nextnonblank},
6772     {"nr2char",		1, 1, f_nr2char},
6773     {"prevnonblank",	1, 1, f_prevnonblank},
6774     {"range",		1, 3, f_range},
6775     {"readfile",	1, 3, f_readfile},
6776     {"remote_expr",	2, 3, f_remote_expr},
6777     {"remote_foreground", 1, 1, f_remote_foreground},
6778     {"remote_peek",	1, 2, f_remote_peek},
6779     {"remote_read",	1, 1, f_remote_read},
6780     {"remote_send",	2, 3, f_remote_send},
6781     {"remove",		2, 3, f_remove},
6782     {"rename",		2, 2, f_rename},
6783     {"repeat",		2, 2, f_repeat},
6784     {"resolve",		1, 1, f_resolve},
6785     {"reverse",		1, 1, f_reverse},
6786     {"search",		1, 2, f_search},
6787     {"searchpair",	3, 5, f_searchpair},
6788     {"server2client",	2, 2, f_server2client},
6789     {"serverlist",	0, 0, f_serverlist},
6790     {"setbufvar",	3, 3, f_setbufvar},
6791     {"setcmdpos",	1, 1, f_setcmdpos},
6792     {"setline",		2, 2, f_setline},
6793     {"setqflist",	1, 2, f_setqflist},
6794     {"setreg",		2, 3, f_setreg},
6795     {"setwinvar",	3, 3, f_setwinvar},
6796     {"simplify",	1, 1, f_simplify},
6797     {"sort",		1, 2, f_sort},
6798     {"soundfold",	1, 1, f_soundfold},
6799     {"spellbadword",	0, 0, f_spellbadword},
6800     {"spellsuggest",	1, 2, f_spellsuggest},
6801     {"split",		1, 3, f_split},
6802 #ifdef HAVE_STRFTIME
6803     {"strftime",	1, 2, f_strftime},
6804 #endif
6805     {"stridx",		2, 3, f_stridx},
6806     {"string",		1, 1, f_string},
6807     {"strlen",		1, 1, f_strlen},
6808     {"strpart",		2, 3, f_strpart},
6809     {"strridx",		2, 3, f_strridx},
6810     {"strtrans",	1, 1, f_strtrans},
6811     {"submatch",	1, 1, f_submatch},
6812     {"substitute",	4, 4, f_substitute},
6813     {"synID",		3, 3, f_synID},
6814     {"synIDattr",	2, 3, f_synIDattr},
6815     {"synIDtrans",	1, 1, f_synIDtrans},
6816     {"system",		1, 2, f_system},
6817     {"taglist",		1, 1, f_taglist},
6818     {"tempname",	0, 0, f_tempname},
6819     {"tolower",		1, 1, f_tolower},
6820     {"toupper",		1, 1, f_toupper},
6821     {"tr",		3, 3, f_tr},
6822     {"type",		1, 1, f_type},
6823     {"values",		1, 1, f_values},
6824     {"virtcol",		1, 1, f_virtcol},
6825     {"visualmode",	0, 1, f_visualmode},
6826     {"winbufnr",	1, 1, f_winbufnr},
6827     {"wincol",		0, 0, f_wincol},
6828     {"winheight",	1, 1, f_winheight},
6829     {"winline",		0, 0, f_winline},
6830     {"winnr",		0, 1, f_winnr},
6831     {"winrestcmd",	0, 0, f_winrestcmd},
6832     {"winwidth",	1, 1, f_winwidth},
6833     {"writefile",	2, 3, f_writefile},
6834 };
6835 
6836 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
6837 
6838 /*
6839  * Function given to ExpandGeneric() to obtain the list of internal
6840  * or user defined function names.
6841  */
6842     char_u *
6843 get_function_name(xp, idx)
6844     expand_T	*xp;
6845     int		idx;
6846 {
6847     static int	intidx = -1;
6848     char_u	*name;
6849 
6850     if (idx == 0)
6851 	intidx = -1;
6852     if (intidx < 0)
6853     {
6854 	name = get_user_func_name(xp, idx);
6855 	if (name != NULL)
6856 	    return name;
6857     }
6858     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
6859     {
6860 	STRCPY(IObuff, functions[intidx].f_name);
6861 	STRCAT(IObuff, "(");
6862 	if (functions[intidx].f_max_argc == 0)
6863 	    STRCAT(IObuff, ")");
6864 	return IObuff;
6865     }
6866 
6867     return NULL;
6868 }
6869 
6870 /*
6871  * Function given to ExpandGeneric() to obtain the list of internal or
6872  * user defined variable or function names.
6873  */
6874 /*ARGSUSED*/
6875     char_u *
6876 get_expr_name(xp, idx)
6877     expand_T	*xp;
6878     int		idx;
6879 {
6880     static int	intidx = -1;
6881     char_u	*name;
6882 
6883     if (idx == 0)
6884 	intidx = -1;
6885     if (intidx < 0)
6886     {
6887 	name = get_function_name(xp, idx);
6888 	if (name != NULL)
6889 	    return name;
6890     }
6891     return get_user_var_name(xp, ++intidx);
6892 }
6893 
6894 #endif /* FEAT_CMDL_COMPL */
6895 
6896 /*
6897  * Find internal function in table above.
6898  * Return index, or -1 if not found
6899  */
6900     static int
6901 find_internal_func(name)
6902     char_u	*name;		/* name of the function */
6903 {
6904     int		first = 0;
6905     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
6906     int		cmp;
6907     int		x;
6908 
6909     /*
6910      * Find the function name in the table. Binary search.
6911      */
6912     while (first <= last)
6913     {
6914 	x = first + ((unsigned)(last - first) >> 1);
6915 	cmp = STRCMP(name, functions[x].f_name);
6916 	if (cmp < 0)
6917 	    last = x - 1;
6918 	else if (cmp > 0)
6919 	    first = x + 1;
6920 	else
6921 	    return x;
6922     }
6923     return -1;
6924 }
6925 
6926 /*
6927  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
6928  * name it contains, otherwise return "name".
6929  */
6930     static char_u *
6931 deref_func_name(name, lenp)
6932     char_u	*name;
6933     int		*lenp;
6934 {
6935     dictitem_T	*v;
6936     int		cc;
6937 
6938     cc = name[*lenp];
6939     name[*lenp] = NUL;
6940     v = find_var(name, NULL);
6941     name[*lenp] = cc;
6942     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
6943     {
6944 	if (v->di_tv.vval.v_string == NULL)
6945 	{
6946 	    *lenp = 0;
6947 	    return (char_u *)"";	/* just in case */
6948 	}
6949 	*lenp = STRLEN(v->di_tv.vval.v_string);
6950 	return v->di_tv.vval.v_string;
6951     }
6952 
6953     return name;
6954 }
6955 
6956 /*
6957  * Allocate a variable for the result of a function.
6958  * Return OK or FAIL.
6959  */
6960     static int
6961 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
6962 							   evaluate, selfdict)
6963     char_u	*name;		/* name of the function */
6964     int		len;		/* length of "name" */
6965     typval_T	*rettv;
6966     char_u	**arg;		/* argument, pointing to the '(' */
6967     linenr_T	firstline;	/* first line of range */
6968     linenr_T	lastline;	/* last line of range */
6969     int		*doesrange;	/* return: function handled range */
6970     int		evaluate;
6971     dict_T	*selfdict;	/* Dictionary for "self" */
6972 {
6973     char_u	*argp;
6974     int		ret = OK;
6975     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
6976     int		argcount = 0;		/* number of arguments found */
6977 
6978     /*
6979      * Get the arguments.
6980      */
6981     argp = *arg;
6982     while (argcount < MAX_FUNC_ARGS)
6983     {
6984 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
6985 	if (*argp == ')' || *argp == ',' || *argp == NUL)
6986 	    break;
6987 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
6988 	{
6989 	    ret = FAIL;
6990 	    break;
6991 	}
6992 	++argcount;
6993 	if (*argp != ',')
6994 	    break;
6995     }
6996     if (*argp == ')')
6997 	++argp;
6998     else
6999 	ret = FAIL;
7000 
7001     if (ret == OK)
7002 	ret = call_func(name, len, rettv, argcount, argvars,
7003 			  firstline, lastline, doesrange, evaluate, selfdict);
7004     else if (!aborting())
7005     {
7006 	if (argcount == MAX_FUNC_ARGS)
7007 	    emsg_funcname("E740: Too many arguments for function %s", name);
7008 	else
7009 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7010     }
7011 
7012     while (--argcount >= 0)
7013 	clear_tv(&argvars[argcount]);
7014 
7015     *arg = skipwhite(argp);
7016     return ret;
7017 }
7018 
7019 
7020 /*
7021  * Call a function with its resolved parameters
7022  * Return OK or FAIL.
7023  */
7024     static int
7025 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7026 						doesrange, evaluate, selfdict)
7027     char_u	*name;		/* name of the function */
7028     int		len;		/* length of "name" */
7029     typval_T	*rettv;		/* return value goes here */
7030     int		argcount;	/* number of "argvars" */
7031     typval_T	*argvars;	/* vars for arguments */
7032     linenr_T	firstline;	/* first line of range */
7033     linenr_T	lastline;	/* last line of range */
7034     int		*doesrange;	/* return: function handled range */
7035     int		evaluate;
7036     dict_T	*selfdict;	/* Dictionary for "self" */
7037 {
7038     int		ret = FAIL;
7039 #define ERROR_UNKNOWN	0
7040 #define ERROR_TOOMANY	1
7041 #define ERROR_TOOFEW	2
7042 #define ERROR_SCRIPT	3
7043 #define ERROR_DICT	4
7044 #define ERROR_NONE	5
7045 #define ERROR_OTHER	6
7046     int		error = ERROR_NONE;
7047     int		i;
7048     int		llen;
7049     ufunc_T	*fp;
7050     int		cc;
7051 #define FLEN_FIXED 40
7052     char_u	fname_buf[FLEN_FIXED + 1];
7053     char_u	*fname;
7054 
7055     /*
7056      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7057      * Change <SNR>123_name() to K_SNR 123_name().
7058      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7059      */
7060     cc = name[len];
7061     name[len] = NUL;
7062     llen = eval_fname_script(name);
7063     if (llen > 0)
7064     {
7065 	fname_buf[0] = K_SPECIAL;
7066 	fname_buf[1] = KS_EXTRA;
7067 	fname_buf[2] = (int)KE_SNR;
7068 	i = 3;
7069 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7070 	{
7071 	    if (current_SID <= 0)
7072 		error = ERROR_SCRIPT;
7073 	    else
7074 	    {
7075 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7076 		i = (int)STRLEN(fname_buf);
7077 	    }
7078 	}
7079 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7080 	{
7081 	    STRCPY(fname_buf + i, name + llen);
7082 	    fname = fname_buf;
7083 	}
7084 	else
7085 	{
7086 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7087 	    if (fname == NULL)
7088 		error = ERROR_OTHER;
7089 	    else
7090 	    {
7091 		mch_memmove(fname, fname_buf, (size_t)i);
7092 		STRCPY(fname + i, name + llen);
7093 	    }
7094 	}
7095     }
7096     else
7097 	fname = name;
7098 
7099     *doesrange = FALSE;
7100 
7101 
7102     /* execute the function if no errors detected and executing */
7103     if (evaluate && error == ERROR_NONE)
7104     {
7105 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7106 	error = ERROR_UNKNOWN;
7107 
7108 	if (!builtin_function(fname))
7109 	{
7110 	    /*
7111 	     * User defined function.
7112 	     */
7113 	    fp = find_func(fname);
7114 
7115 #ifdef FEAT_AUTOCMD
7116 	    /* Trigger FuncUndefined event, may load the function. */
7117 	    if (fp == NULL
7118 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7119 						     fname, fname, TRUE, NULL)
7120 		    && !aborting())
7121 	    {
7122 		/* executed an autocommand, search for the function again */
7123 		fp = find_func(fname);
7124 	    }
7125 #endif
7126 	    /* Try loading a package. */
7127 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7128 	    {
7129 		/* loaded a package, search for the function again */
7130 		fp = find_func(fname);
7131 	    }
7132 
7133 	    if (fp != NULL)
7134 	    {
7135 		if (fp->uf_flags & FC_RANGE)
7136 		    *doesrange = TRUE;
7137 		if (argcount < fp->uf_args.ga_len)
7138 		    error = ERROR_TOOFEW;
7139 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7140 		    error = ERROR_TOOMANY;
7141 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7142 		    error = ERROR_DICT;
7143 		else
7144 		{
7145 		    /*
7146 		     * Call the user function.
7147 		     * Save and restore search patterns, script variables and
7148 		     * redo buffer.
7149 		     */
7150 		    save_search_patterns();
7151 		    saveRedobuff();
7152 		    ++fp->uf_calls;
7153 		    call_user_func(fp, argcount, argvars, rettv,
7154 					       firstline, lastline,
7155 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7156 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7157 						      && fp->uf_refcount <= 0)
7158 			/* Function was unreferenced while being used, free it
7159 			 * now. */
7160 			func_free(fp);
7161 		    restoreRedobuff();
7162 		    restore_search_patterns();
7163 		    error = ERROR_NONE;
7164 		}
7165 	    }
7166 	}
7167 	else
7168 	{
7169 	    /*
7170 	     * Find the function name in the table, call its implementation.
7171 	     */
7172 	    i = find_internal_func(fname);
7173 	    if (i >= 0)
7174 	    {
7175 		if (argcount < functions[i].f_min_argc)
7176 		    error = ERROR_TOOFEW;
7177 		else if (argcount > functions[i].f_max_argc)
7178 		    error = ERROR_TOOMANY;
7179 		else
7180 		{
7181 		    argvars[argcount].v_type = VAR_UNKNOWN;
7182 		    functions[i].f_func(argvars, rettv);
7183 		    error = ERROR_NONE;
7184 		}
7185 	    }
7186 	}
7187 	/*
7188 	 * The function call (or "FuncUndefined" autocommand sequence) might
7189 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7190 	 * exception that has not been caught so far.  This situation can be
7191 	 * tested for by calling aborting().  For an error in an internal
7192 	 * function or for the "E132" error in call_user_func(), however, the
7193 	 * throw point at which the "force_abort" flag (temporarily reset by
7194 	 * emsg()) is normally updated has not been reached yet. We need to
7195 	 * update that flag first to make aborting() reliable.
7196 	 */
7197 	update_force_abort();
7198     }
7199     if (error == ERROR_NONE)
7200 	ret = OK;
7201 
7202     /*
7203      * Report an error unless the argument evaluation or function call has been
7204      * cancelled due to an aborting error, an interrupt, or an exception.
7205      */
7206     if (!aborting())
7207     {
7208 	switch (error)
7209 	{
7210 	    case ERROR_UNKNOWN:
7211 		    emsg_funcname("E117: Unknown function: %s", name);
7212 		    break;
7213 	    case ERROR_TOOMANY:
7214 		    emsg_funcname(e_toomanyarg, name);
7215 		    break;
7216 	    case ERROR_TOOFEW:
7217 		    emsg_funcname("E119: Not enough arguments for function: %s",
7218 									name);
7219 		    break;
7220 	    case ERROR_SCRIPT:
7221 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7222 									name);
7223 		    break;
7224 	    case ERROR_DICT:
7225 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7226 									name);
7227 		    break;
7228 	}
7229     }
7230 
7231     name[len] = cc;
7232     if (fname != name && fname != fname_buf)
7233 	vim_free(fname);
7234 
7235     return ret;
7236 }
7237 
7238 /*
7239  * Give an error message with a function name.  Handle <SNR> things.
7240  */
7241     static void
7242 emsg_funcname(msg, name)
7243     char	*msg;
7244     char_u	*name;
7245 {
7246     char_u	*p;
7247 
7248     if (*name == K_SPECIAL)
7249 	p = concat_str((char_u *)"<SNR>", name + 3);
7250     else
7251 	p = name;
7252     EMSG2(_(msg), p);
7253     if (p != name)
7254 	vim_free(p);
7255 }
7256 
7257 /*********************************************
7258  * Implementation of the built-in functions
7259  */
7260 
7261 /*
7262  * "add(list, item)" function
7263  */
7264     static void
7265 f_add(argvars, rettv)
7266     typval_T	*argvars;
7267     typval_T	*rettv;
7268 {
7269     list_T	*l;
7270 
7271     rettv->vval.v_number = 1; /* Default: Failed */
7272     if (argvars[0].v_type == VAR_LIST)
7273     {
7274 	if ((l = argvars[0].vval.v_list) != NULL
7275 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7276 		&& list_append_tv(l, &argvars[1]) == OK)
7277 	    copy_tv(&argvars[0], rettv);
7278     }
7279     else
7280 	EMSG(_(e_listreq));
7281 }
7282 
7283 /*
7284  * "append(lnum, string/list)" function
7285  */
7286     static void
7287 f_append(argvars, rettv)
7288     typval_T	*argvars;
7289     typval_T	*rettv;
7290 {
7291     long	lnum;
7292     char_u	*line;
7293     list_T	*l = NULL;
7294     listitem_T	*li = NULL;
7295     typval_T	*tv;
7296     long	added = 0;
7297 
7298     lnum = get_tv_lnum(argvars);
7299     if (lnum >= 0
7300 	    && lnum <= curbuf->b_ml.ml_line_count
7301 	    && u_save(lnum, lnum + 1) == OK)
7302     {
7303 	if (argvars[1].v_type == VAR_LIST)
7304 	{
7305 	    l = argvars[1].vval.v_list;
7306 	    if (l == NULL)
7307 		return;
7308 	    li = l->lv_first;
7309 	}
7310 	rettv->vval.v_number = 0;	/* Default: Success */
7311 	for (;;)
7312 	{
7313 	    if (l == NULL)
7314 		tv = &argvars[1];	/* append a string */
7315 	    else if (li == NULL)
7316 		break;			/* end of list */
7317 	    else
7318 		tv = &li->li_tv;	/* append item from list */
7319 	    line = get_tv_string_chk(tv);
7320 	    if (line == NULL)		/* type error */
7321 	    {
7322 		rettv->vval.v_number = 1;	/* Failed */
7323 		break;
7324 	    }
7325 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7326 	    ++added;
7327 	    if (l == NULL)
7328 		break;
7329 	    li = li->li_next;
7330 	}
7331 
7332 	appended_lines_mark(lnum, added);
7333 	if (curwin->w_cursor.lnum > lnum)
7334 	    curwin->w_cursor.lnum += added;
7335     }
7336     else
7337 	rettv->vval.v_number = 1;	/* Failed */
7338 }
7339 
7340 /*
7341  * "argc()" function
7342  */
7343 /* ARGSUSED */
7344     static void
7345 f_argc(argvars, rettv)
7346     typval_T	*argvars;
7347     typval_T	*rettv;
7348 {
7349     rettv->vval.v_number = ARGCOUNT;
7350 }
7351 
7352 /*
7353  * "argidx()" function
7354  */
7355 /* ARGSUSED */
7356     static void
7357 f_argidx(argvars, rettv)
7358     typval_T	*argvars;
7359     typval_T	*rettv;
7360 {
7361     rettv->vval.v_number = curwin->w_arg_idx;
7362 }
7363 
7364 /*
7365  * "argv(nr)" function
7366  */
7367     static void
7368 f_argv(argvars, rettv)
7369     typval_T	*argvars;
7370     typval_T	*rettv;
7371 {
7372     int		idx;
7373 
7374     idx = get_tv_number_chk(&argvars[0], NULL);
7375     if (idx >= 0 && idx < ARGCOUNT)
7376 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7377     else
7378 	rettv->vval.v_string = NULL;
7379     rettv->v_type = VAR_STRING;
7380 }
7381 
7382 /*
7383  * "browse(save, title, initdir, default)" function
7384  */
7385 /* ARGSUSED */
7386     static void
7387 f_browse(argvars, rettv)
7388     typval_T	*argvars;
7389     typval_T	*rettv;
7390 {
7391 #ifdef FEAT_BROWSE
7392     int		save;
7393     char_u	*title;
7394     char_u	*initdir;
7395     char_u	*defname;
7396     char_u	buf[NUMBUFLEN];
7397     char_u	buf2[NUMBUFLEN];
7398     int		error = FALSE;
7399 
7400     save = get_tv_number_chk(&argvars[0], &error);
7401     title = get_tv_string_chk(&argvars[1]);
7402     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7403     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7404 
7405     if (error || title == NULL || initdir == NULL || defname == NULL)
7406 	rettv->vval.v_string = NULL;
7407     else
7408 	rettv->vval.v_string =
7409 		 do_browse(save ? BROWSE_SAVE : 0,
7410 				 title, defname, NULL, initdir, NULL, curbuf);
7411 #else
7412     rettv->vval.v_string = NULL;
7413 #endif
7414     rettv->v_type = VAR_STRING;
7415 }
7416 
7417 /*
7418  * "browsedir(title, initdir)" function
7419  */
7420 /* ARGSUSED */
7421     static void
7422 f_browsedir(argvars, rettv)
7423     typval_T	*argvars;
7424     typval_T	*rettv;
7425 {
7426 #ifdef FEAT_BROWSE
7427     char_u	*title;
7428     char_u	*initdir;
7429     char_u	buf[NUMBUFLEN];
7430 
7431     title = get_tv_string_chk(&argvars[0]);
7432     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7433 
7434     if (title == NULL || initdir == NULL)
7435 	rettv->vval.v_string = NULL;
7436     else
7437 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7438 				    title, NULL, NULL, initdir, NULL, curbuf);
7439 #else
7440     rettv->vval.v_string = NULL;
7441 #endif
7442     rettv->v_type = VAR_STRING;
7443 }
7444 
7445 static buf_T *find_buffer __ARGS((typval_T *avar));
7446 
7447 /*
7448  * Find a buffer by number or exact name.
7449  */
7450     static buf_T *
7451 find_buffer(avar)
7452     typval_T	*avar;
7453 {
7454     buf_T	*buf = NULL;
7455 
7456     if (avar->v_type == VAR_NUMBER)
7457 	buf = buflist_findnr((int)avar->vval.v_number);
7458     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7459     {
7460 	buf = buflist_findname_exp(avar->vval.v_string);
7461 	if (buf == NULL)
7462 	{
7463 	    /* No full path name match, try a match with a URL or a "nofile"
7464 	     * buffer, these don't use the full path. */
7465 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7466 		if (buf->b_fname != NULL
7467 			&& (path_with_url(buf->b_fname)
7468 #ifdef FEAT_QUICKFIX
7469 			    || bt_nofile(buf)
7470 #endif
7471 			   )
7472 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7473 		    break;
7474 	}
7475     }
7476     return buf;
7477 }
7478 
7479 /*
7480  * "bufexists(expr)" function
7481  */
7482     static void
7483 f_bufexists(argvars, rettv)
7484     typval_T	*argvars;
7485     typval_T	*rettv;
7486 {
7487     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7488 }
7489 
7490 /*
7491  * "buflisted(expr)" function
7492  */
7493     static void
7494 f_buflisted(argvars, rettv)
7495     typval_T	*argvars;
7496     typval_T	*rettv;
7497 {
7498     buf_T	*buf;
7499 
7500     buf = find_buffer(&argvars[0]);
7501     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7502 }
7503 
7504 /*
7505  * "bufloaded(expr)" function
7506  */
7507     static void
7508 f_bufloaded(argvars, rettv)
7509     typval_T	*argvars;
7510     typval_T	*rettv;
7511 {
7512     buf_T	*buf;
7513 
7514     buf = find_buffer(&argvars[0]);
7515     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7516 }
7517 
7518 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7519 
7520 /*
7521  * Get buffer by number or pattern.
7522  */
7523     static buf_T *
7524 get_buf_tv(tv)
7525     typval_T	*tv;
7526 {
7527     char_u	*name = tv->vval.v_string;
7528     int		save_magic;
7529     char_u	*save_cpo;
7530     buf_T	*buf;
7531 
7532     if (tv->v_type == VAR_NUMBER)
7533 	return buflist_findnr((int)tv->vval.v_number);
7534     if (tv->v_type != VAR_STRING)
7535 	return NULL;
7536     if (name == NULL || *name == NUL)
7537 	return curbuf;
7538     if (name[0] == '$' && name[1] == NUL)
7539 	return lastbuf;
7540 
7541     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7542     save_magic = p_magic;
7543     p_magic = TRUE;
7544     save_cpo = p_cpo;
7545     p_cpo = (char_u *)"";
7546 
7547     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7548 								TRUE, FALSE));
7549 
7550     p_magic = save_magic;
7551     p_cpo = save_cpo;
7552 
7553     /* If not found, try expanding the name, like done for bufexists(). */
7554     if (buf == NULL)
7555 	buf = find_buffer(tv);
7556 
7557     return buf;
7558 }
7559 
7560 /*
7561  * "bufname(expr)" function
7562  */
7563     static void
7564 f_bufname(argvars, rettv)
7565     typval_T	*argvars;
7566     typval_T	*rettv;
7567 {
7568     buf_T	*buf;
7569 
7570     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7571     ++emsg_off;
7572     buf = get_buf_tv(&argvars[0]);
7573     rettv->v_type = VAR_STRING;
7574     if (buf != NULL && buf->b_fname != NULL)
7575 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7576     else
7577 	rettv->vval.v_string = NULL;
7578     --emsg_off;
7579 }
7580 
7581 /*
7582  * "bufnr(expr)" function
7583  */
7584     static void
7585 f_bufnr(argvars, rettv)
7586     typval_T	*argvars;
7587     typval_T	*rettv;
7588 {
7589     buf_T	*buf;
7590 
7591     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7592     ++emsg_off;
7593     buf = get_buf_tv(&argvars[0]);
7594     if (buf != NULL)
7595 	rettv->vval.v_number = buf->b_fnum;
7596     else
7597 	rettv->vval.v_number = -1;
7598     --emsg_off;
7599 }
7600 
7601 /*
7602  * "bufwinnr(nr)" function
7603  */
7604     static void
7605 f_bufwinnr(argvars, rettv)
7606     typval_T	*argvars;
7607     typval_T	*rettv;
7608 {
7609 #ifdef FEAT_WINDOWS
7610     win_T	*wp;
7611     int		winnr = 0;
7612 #endif
7613     buf_T	*buf;
7614 
7615     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7616     ++emsg_off;
7617     buf = get_buf_tv(&argvars[0]);
7618 #ifdef FEAT_WINDOWS
7619     for (wp = firstwin; wp; wp = wp->w_next)
7620     {
7621 	++winnr;
7622 	if (wp->w_buffer == buf)
7623 	    break;
7624     }
7625     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7626 #else
7627     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7628 #endif
7629     --emsg_off;
7630 }
7631 
7632 /*
7633  * "byte2line(byte)" function
7634  */
7635 /*ARGSUSED*/
7636     static void
7637 f_byte2line(argvars, rettv)
7638     typval_T	*argvars;
7639     typval_T	*rettv;
7640 {
7641 #ifndef FEAT_BYTEOFF
7642     rettv->vval.v_number = -1;
7643 #else
7644     long	boff = 0;
7645 
7646     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7647     if (boff < 0)
7648 	rettv->vval.v_number = -1;
7649     else
7650 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7651 							  (linenr_T)0, &boff);
7652 #endif
7653 }
7654 
7655 /*
7656  * "byteidx()" function
7657  */
7658 /*ARGSUSED*/
7659     static void
7660 f_byteidx(argvars, rettv)
7661     typval_T	*argvars;
7662     typval_T	*rettv;
7663 {
7664 #ifdef FEAT_MBYTE
7665     char_u	*t;
7666 #endif
7667     char_u	*str;
7668     long	idx;
7669 
7670     str = get_tv_string_chk(&argvars[0]);
7671     idx = get_tv_number_chk(&argvars[1], NULL);
7672     rettv->vval.v_number = -1;
7673     if (str == NULL || idx < 0)
7674 	return;
7675 
7676 #ifdef FEAT_MBYTE
7677     t = str;
7678     for ( ; idx > 0; idx--)
7679     {
7680 	if (*t == NUL)		/* EOL reached */
7681 	    return;
7682 	t += mb_ptr2len_check(t);
7683     }
7684     rettv->vval.v_number = t - str;
7685 #else
7686     if (idx <= STRLEN(str))
7687 	rettv->vval.v_number = idx;
7688 #endif
7689 }
7690 
7691 /*
7692  * "call(func, arglist)" function
7693  */
7694     static void
7695 f_call(argvars, rettv)
7696     typval_T	*argvars;
7697     typval_T	*rettv;
7698 {
7699     char_u	*func;
7700     typval_T	argv[MAX_FUNC_ARGS];
7701     int		argc = 0;
7702     listitem_T	*item;
7703     int		dummy;
7704     dict_T	*selfdict = NULL;
7705 
7706     rettv->vval.v_number = 0;
7707     if (argvars[1].v_type != VAR_LIST)
7708     {
7709 	EMSG(_(e_listreq));
7710 	return;
7711     }
7712     if (argvars[1].vval.v_list == NULL)
7713 	return;
7714 
7715     if (argvars[0].v_type == VAR_FUNC)
7716 	func = argvars[0].vval.v_string;
7717     else
7718 	func = get_tv_string(&argvars[0]);
7719     if (*func == NUL)
7720 	return;		/* type error or empty name */
7721 
7722     if (argvars[2].v_type != VAR_UNKNOWN)
7723     {
7724 	if (argvars[2].v_type != VAR_DICT)
7725 	{
7726 	    EMSG(_(e_dictreq));
7727 	    return;
7728 	}
7729 	selfdict = argvars[2].vval.v_dict;
7730     }
7731 
7732     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7733 							 item = item->li_next)
7734     {
7735 	if (argc == MAX_FUNC_ARGS)
7736 	{
7737 	    EMSG(_("E699: Too many arguments"));
7738 	    break;
7739 	}
7740 	/* Make a copy of each argument.  This is needed to be able to set
7741 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7742 	 */
7743 	copy_tv(&item->li_tv, &argv[argc++]);
7744     }
7745 
7746     if (item == NULL)
7747 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
7748 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
7749 						      &dummy, TRUE, selfdict);
7750 
7751     /* Free the arguments. */
7752     while (argc > 0)
7753 	clear_tv(&argv[--argc]);
7754 }
7755 
7756 /*
7757  * "char2nr(string)" function
7758  */
7759     static void
7760 f_char2nr(argvars, rettv)
7761     typval_T	*argvars;
7762     typval_T	*rettv;
7763 {
7764 #ifdef FEAT_MBYTE
7765     if (has_mbyte)
7766 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
7767     else
7768 #endif
7769     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
7770 }
7771 
7772 /*
7773  * "cindent(lnum)" function
7774  */
7775     static void
7776 f_cindent(argvars, rettv)
7777     typval_T	*argvars;
7778     typval_T	*rettv;
7779 {
7780 #ifdef FEAT_CINDENT
7781     pos_T	pos;
7782     linenr_T	lnum;
7783 
7784     pos = curwin->w_cursor;
7785     lnum = get_tv_lnum(argvars);
7786     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
7787     {
7788 	curwin->w_cursor.lnum = lnum;
7789 	rettv->vval.v_number = get_c_indent();
7790 	curwin->w_cursor = pos;
7791     }
7792     else
7793 #endif
7794 	rettv->vval.v_number = -1;
7795 }
7796 
7797 /*
7798  * "col(string)" function
7799  */
7800     static void
7801 f_col(argvars, rettv)
7802     typval_T	*argvars;
7803     typval_T	*rettv;
7804 {
7805     colnr_T	col = 0;
7806     pos_T	*fp;
7807 
7808     fp = var2fpos(&argvars[0], FALSE);
7809     if (fp != NULL)
7810     {
7811 	if (fp->col == MAXCOL)
7812 	{
7813 	    /* '> can be MAXCOL, get the length of the line then */
7814 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
7815 		col = STRLEN(ml_get(fp->lnum)) + 1;
7816 	    else
7817 		col = MAXCOL;
7818 	}
7819 	else
7820 	{
7821 	    col = fp->col + 1;
7822 #ifdef FEAT_VIRTUALEDIT
7823 	    /* col(".") when the cursor is on the NUL at the end of the line
7824 	     * because of "coladd" can be seen as an extra column. */
7825 	    if (virtual_active() && fp == &curwin->w_cursor)
7826 	    {
7827 		char_u	*p = ml_get_cursor();
7828 
7829 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
7830 				 curwin->w_virtcol - curwin->w_cursor.coladd))
7831 		{
7832 # ifdef FEAT_MBYTE
7833 		    int		l;
7834 
7835 		    if (*p != NUL && p[(l = (*mb_ptr2len_check)(p))] == NUL)
7836 			col += l;
7837 # else
7838 		    if (*p != NUL && p[1] == NUL)
7839 			++col;
7840 # endif
7841 		}
7842 	    }
7843 #endif
7844 	}
7845     }
7846     rettv->vval.v_number = col;
7847 }
7848 
7849 /*
7850  * "confirm(message, buttons[, default [, type]])" function
7851  */
7852 /*ARGSUSED*/
7853     static void
7854 f_confirm(argvars, rettv)
7855     typval_T	*argvars;
7856     typval_T	*rettv;
7857 {
7858 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
7859     char_u	*message;
7860     char_u	*buttons = NULL;
7861     char_u	buf[NUMBUFLEN];
7862     char_u	buf2[NUMBUFLEN];
7863     int		def = 1;
7864     int		type = VIM_GENERIC;
7865     char_u	*typestr;
7866     int		error = FALSE;
7867 
7868     message = get_tv_string_chk(&argvars[0]);
7869     if (message == NULL)
7870 	error = TRUE;
7871     if (argvars[1].v_type != VAR_UNKNOWN)
7872     {
7873 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
7874 	if (buttons == NULL)
7875 	    error = TRUE;
7876 	if (argvars[2].v_type != VAR_UNKNOWN)
7877 	{
7878 	    def = get_tv_number_chk(&argvars[2], &error);
7879 	    if (argvars[3].v_type != VAR_UNKNOWN)
7880 	    {
7881 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
7882 		if (typestr == NULL)
7883 		    error = TRUE;
7884 		else
7885 		{
7886 		    switch (TOUPPER_ASC(*typestr))
7887 		    {
7888 			case 'E': type = VIM_ERROR; break;
7889 			case 'Q': type = VIM_QUESTION; break;
7890 			case 'I': type = VIM_INFO; break;
7891 			case 'W': type = VIM_WARNING; break;
7892 			case 'G': type = VIM_GENERIC; break;
7893 		    }
7894 		}
7895 	    }
7896 	}
7897     }
7898 
7899     if (buttons == NULL || *buttons == NUL)
7900 	buttons = (char_u *)_("&Ok");
7901 
7902     if (error)
7903 	rettv->vval.v_number = 0;
7904     else
7905 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
7906 								   def, NULL);
7907 #else
7908     rettv->vval.v_number = 0;
7909 #endif
7910 }
7911 
7912 /*
7913  * "copy()" function
7914  */
7915     static void
7916 f_copy(argvars, rettv)
7917     typval_T	*argvars;
7918     typval_T	*rettv;
7919 {
7920     item_copy(&argvars[0], rettv, FALSE, 0);
7921 }
7922 
7923 /*
7924  * "count()" function
7925  */
7926     static void
7927 f_count(argvars, rettv)
7928     typval_T	*argvars;
7929     typval_T	*rettv;
7930 {
7931     long	n = 0;
7932     int		ic = FALSE;
7933 
7934     if (argvars[0].v_type == VAR_LIST)
7935     {
7936 	listitem_T	*li;
7937 	list_T		*l;
7938 	long		idx;
7939 
7940 	if ((l = argvars[0].vval.v_list) != NULL)
7941 	{
7942 	    li = l->lv_first;
7943 	    if (argvars[2].v_type != VAR_UNKNOWN)
7944 	    {
7945 		int error = FALSE;
7946 
7947 		ic = get_tv_number_chk(&argvars[2], &error);
7948 		if (argvars[3].v_type != VAR_UNKNOWN)
7949 		{
7950 		    idx = get_tv_number_chk(&argvars[3], &error);
7951 		    if (!error)
7952 		    {
7953 			li = list_find(l, idx);
7954 			if (li == NULL)
7955 			    EMSGN(_(e_listidx), idx);
7956 		    }
7957 		}
7958 		if (error)
7959 		    li = NULL;
7960 	    }
7961 
7962 	    for ( ; li != NULL; li = li->li_next)
7963 		if (tv_equal(&li->li_tv, &argvars[1], ic))
7964 		    ++n;
7965 	}
7966     }
7967     else if (argvars[0].v_type == VAR_DICT)
7968     {
7969 	int		todo;
7970 	dict_T		*d;
7971 	hashitem_T	*hi;
7972 
7973 	if ((d = argvars[0].vval.v_dict) != NULL)
7974 	{
7975 	    int error = FALSE;
7976 
7977 	    if (argvars[2].v_type != VAR_UNKNOWN)
7978 	    {
7979 		ic = get_tv_number_chk(&argvars[2], &error);
7980 		if (argvars[3].v_type != VAR_UNKNOWN)
7981 		    EMSG(_(e_invarg));
7982 	    }
7983 
7984 	    todo = error ? 0 : d->dv_hashtab.ht_used;
7985 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
7986 	    {
7987 		if (!HASHITEM_EMPTY(hi))
7988 		{
7989 		    --todo;
7990 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
7991 			++n;
7992 		}
7993 	    }
7994 	}
7995     }
7996     else
7997 	EMSG2(_(e_listdictarg), "count()");
7998     rettv->vval.v_number = n;
7999 }
8000 
8001 /*
8002  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8003  *
8004  * Checks the existence of a cscope connection.
8005  */
8006 /*ARGSUSED*/
8007     static void
8008 f_cscope_connection(argvars, rettv)
8009     typval_T	*argvars;
8010     typval_T	*rettv;
8011 {
8012 #ifdef FEAT_CSCOPE
8013     int		num = 0;
8014     char_u	*dbpath = NULL;
8015     char_u	*prepend = NULL;
8016     char_u	buf[NUMBUFLEN];
8017 
8018     if (argvars[0].v_type != VAR_UNKNOWN
8019 	    && argvars[1].v_type != VAR_UNKNOWN)
8020     {
8021 	num = (int)get_tv_number(&argvars[0]);
8022 	dbpath = get_tv_string(&argvars[1]);
8023 	if (argvars[2].v_type != VAR_UNKNOWN)
8024 	    prepend = get_tv_string_buf(&argvars[2], buf);
8025     }
8026 
8027     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8028 #else
8029     rettv->vval.v_number = 0;
8030 #endif
8031 }
8032 
8033 /*
8034  * "cursor(lnum, col)" function
8035  *
8036  * Moves the cursor to the specified line and column
8037  */
8038 /*ARGSUSED*/
8039     static void
8040 f_cursor(argvars, rettv)
8041     typval_T	*argvars;
8042     typval_T	*rettv;
8043 {
8044     long	line, col;
8045 
8046     line = get_tv_lnum(argvars);
8047     col = get_tv_number_chk(&argvars[1], NULL);
8048     if (line < 0 || col < 0)
8049 	return;		/* type error; errmsg already given */
8050     if (line > 0)
8051 	curwin->w_cursor.lnum = line;
8052     if (col > 0)
8053 	curwin->w_cursor.col = col - 1;
8054 #ifdef FEAT_VIRTUALEDIT
8055     curwin->w_cursor.coladd = 0;
8056 #endif
8057 
8058     /* Make sure the cursor is in a valid position. */
8059     check_cursor();
8060 #ifdef FEAT_MBYTE
8061     /* Correct cursor for multi-byte character. */
8062     if (has_mbyte)
8063 	mb_adjust_cursor();
8064 #endif
8065 
8066     curwin->w_set_curswant = TRUE;
8067 }
8068 
8069 /*
8070  * "deepcopy()" function
8071  */
8072     static void
8073 f_deepcopy(argvars, rettv)
8074     typval_T	*argvars;
8075     typval_T	*rettv;
8076 {
8077     int		noref = 0;
8078 
8079     if (argvars[1].v_type != VAR_UNKNOWN)
8080 	noref = get_tv_number_chk(&argvars[1], NULL);
8081     if (noref < 0 || noref > 1)
8082 	EMSG(_(e_invarg));
8083     else
8084 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8085 }
8086 
8087 /*
8088  * "delete()" function
8089  */
8090     static void
8091 f_delete(argvars, rettv)
8092     typval_T	*argvars;
8093     typval_T	*rettv;
8094 {
8095     if (check_restricted() || check_secure())
8096 	rettv->vval.v_number = -1;
8097     else
8098 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8099 }
8100 
8101 /*
8102  * "did_filetype()" function
8103  */
8104 /*ARGSUSED*/
8105     static void
8106 f_did_filetype(argvars, rettv)
8107     typval_T	*argvars;
8108     typval_T	*rettv;
8109 {
8110 #ifdef FEAT_AUTOCMD
8111     rettv->vval.v_number = did_filetype;
8112 #else
8113     rettv->vval.v_number = 0;
8114 #endif
8115 }
8116 
8117 /*
8118  * "diff_filler()" function
8119  */
8120 /*ARGSUSED*/
8121     static void
8122 f_diff_filler(argvars, rettv)
8123     typval_T	*argvars;
8124     typval_T	*rettv;
8125 {
8126 #ifdef FEAT_DIFF
8127     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8128 #endif
8129 }
8130 
8131 /*
8132  * "diff_hlID()" function
8133  */
8134 /*ARGSUSED*/
8135     static void
8136 f_diff_hlID(argvars, rettv)
8137     typval_T	*argvars;
8138     typval_T	*rettv;
8139 {
8140 #ifdef FEAT_DIFF
8141     linenr_T		lnum = get_tv_lnum(argvars);
8142     static linenr_T	prev_lnum = 0;
8143     static int		changedtick = 0;
8144     static int		fnum = 0;
8145     static int		change_start = 0;
8146     static int		change_end = 0;
8147     static enum hlf_value hlID = 0;
8148     int			filler_lines;
8149     int			col;
8150 
8151     if (lnum < 0)	/* ignore type error in {lnum} arg */
8152 	lnum = 0;
8153     if (lnum != prev_lnum
8154 	    || changedtick != curbuf->b_changedtick
8155 	    || fnum != curbuf->b_fnum)
8156     {
8157 	/* New line, buffer, change: need to get the values. */
8158 	filler_lines = diff_check(curwin, lnum);
8159 	if (filler_lines < 0)
8160 	{
8161 	    if (filler_lines == -1)
8162 	    {
8163 		change_start = MAXCOL;
8164 		change_end = -1;
8165 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8166 		    hlID = HLF_ADD;	/* added line */
8167 		else
8168 		    hlID = HLF_CHD;	/* changed line */
8169 	    }
8170 	    else
8171 		hlID = HLF_ADD;	/* added line */
8172 	}
8173 	else
8174 	    hlID = (enum hlf_value)0;
8175 	prev_lnum = lnum;
8176 	changedtick = curbuf->b_changedtick;
8177 	fnum = curbuf->b_fnum;
8178     }
8179 
8180     if (hlID == HLF_CHD || hlID == HLF_TXD)
8181     {
8182 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8183 	if (col >= change_start && col <= change_end)
8184 	    hlID = HLF_TXD;			/* changed text */
8185 	else
8186 	    hlID = HLF_CHD;			/* changed line */
8187     }
8188     rettv->vval.v_number = hlID == (enum hlf_value)0 ? 0 : (int)hlID;
8189 #endif
8190 }
8191 
8192 /*
8193  * "empty({expr})" function
8194  */
8195     static void
8196 f_empty(argvars, rettv)
8197     typval_T	*argvars;
8198     typval_T	*rettv;
8199 {
8200     int		n;
8201 
8202     switch (argvars[0].v_type)
8203     {
8204 	case VAR_STRING:
8205 	case VAR_FUNC:
8206 	    n = argvars[0].vval.v_string == NULL
8207 					  || *argvars[0].vval.v_string == NUL;
8208 	    break;
8209 	case VAR_NUMBER:
8210 	    n = argvars[0].vval.v_number == 0;
8211 	    break;
8212 	case VAR_LIST:
8213 	    n = argvars[0].vval.v_list == NULL
8214 				  || argvars[0].vval.v_list->lv_first == NULL;
8215 	    break;
8216 	case VAR_DICT:
8217 	    n = argvars[0].vval.v_dict == NULL
8218 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8219 	    break;
8220 	default:
8221 	    EMSG2(_(e_intern2), "f_empty()");
8222 	    n = 0;
8223     }
8224 
8225     rettv->vval.v_number = n;
8226 }
8227 
8228 /*
8229  * "escape({string}, {chars})" function
8230  */
8231     static void
8232 f_escape(argvars, rettv)
8233     typval_T	*argvars;
8234     typval_T	*rettv;
8235 {
8236     char_u	buf[NUMBUFLEN];
8237 
8238     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8239 					 get_tv_string_buf(&argvars[1], buf));
8240     rettv->v_type = VAR_STRING;
8241 }
8242 
8243 /*
8244  * "eval()" function
8245  */
8246 /*ARGSUSED*/
8247     static void
8248 f_eval(argvars, rettv)
8249     typval_T	*argvars;
8250     typval_T	*rettv;
8251 {
8252     char_u	*s;
8253 
8254     s = get_tv_string_chk(&argvars[0]);
8255     if (s != NULL)
8256 	s = skipwhite(s);
8257 
8258     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8259     {
8260 	rettv->v_type = VAR_NUMBER;
8261 	rettv->vval.v_number = 0;
8262     }
8263     else if (*s != NUL)
8264 	EMSG(_(e_trailing));
8265 }
8266 
8267 /*
8268  * "eventhandler()" function
8269  */
8270 /*ARGSUSED*/
8271     static void
8272 f_eventhandler(argvars, rettv)
8273     typval_T	*argvars;
8274     typval_T	*rettv;
8275 {
8276     rettv->vval.v_number = vgetc_busy;
8277 }
8278 
8279 /*
8280  * "executable()" function
8281  */
8282     static void
8283 f_executable(argvars, rettv)
8284     typval_T	*argvars;
8285     typval_T	*rettv;
8286 {
8287     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8288 }
8289 
8290 /*
8291  * "exists()" function
8292  */
8293     static void
8294 f_exists(argvars, rettv)
8295     typval_T	*argvars;
8296     typval_T	*rettv;
8297 {
8298     char_u	*p;
8299     char_u	*name;
8300     int		n = FALSE;
8301     int		len = 0;
8302 
8303     p = get_tv_string(&argvars[0]);
8304     if (*p == '$')			/* environment variable */
8305     {
8306 	/* first try "normal" environment variables (fast) */
8307 	if (mch_getenv(p + 1) != NULL)
8308 	    n = TRUE;
8309 	else
8310 	{
8311 	    /* try expanding things like $VIM and ${HOME} */
8312 	    p = expand_env_save(p);
8313 	    if (p != NULL && *p != '$')
8314 		n = TRUE;
8315 	    vim_free(p);
8316 	}
8317     }
8318     else if (*p == '&' || *p == '+')			/* option */
8319 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8320     else if (*p == '*')			/* internal or user defined function */
8321     {
8322 	n = function_exists(p + 1);
8323     }
8324     else if (*p == ':')
8325     {
8326 	n = cmd_exists(p + 1);
8327     }
8328     else if (*p == '#')
8329     {
8330 #ifdef FEAT_AUTOCMD
8331 	name = p + 1;
8332 	p = vim_strchr(name, '#');
8333 	if (p != NULL)
8334 	    n = au_exists(name, p, p + 1);
8335 	else
8336 	    n = au_exists(name, name + STRLEN(name), NULL);
8337 #endif
8338     }
8339     else				/* internal variable */
8340     {
8341 	char_u	    *tofree;
8342 	typval_T    tv;
8343 
8344 	/* get_name_len() takes care of expanding curly braces */
8345 	name = p;
8346 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8347 	if (len > 0)
8348 	{
8349 	    if (tofree != NULL)
8350 		name = tofree;
8351 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8352 	    if (n)
8353 	    {
8354 		/* handle d.key, l[idx], f(expr) */
8355 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8356 		if (n)
8357 		    clear_tv(&tv);
8358 	    }
8359 	}
8360 
8361 	vim_free(tofree);
8362     }
8363 
8364     rettv->vval.v_number = n;
8365 }
8366 
8367 /*
8368  * "expand()" function
8369  */
8370     static void
8371 f_expand(argvars, rettv)
8372     typval_T	*argvars;
8373     typval_T	*rettv;
8374 {
8375     char_u	*s;
8376     int		len;
8377     char_u	*errormsg;
8378     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8379     expand_T	xpc;
8380     int		error = FALSE;
8381 
8382     rettv->v_type = VAR_STRING;
8383     s = get_tv_string(&argvars[0]);
8384     if (*s == '%' || *s == '#' || *s == '<')
8385     {
8386 	++emsg_off;
8387 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8388 	--emsg_off;
8389     }
8390     else
8391     {
8392 	/* When the optional second argument is non-zero, don't remove matches
8393 	 * for 'suffixes' and 'wildignore' */
8394 	if (argvars[1].v_type != VAR_UNKNOWN
8395 				    && get_tv_number_chk(&argvars[1], &error))
8396 	    flags |= WILD_KEEP_ALL;
8397 	if (!error)
8398 	{
8399 	    ExpandInit(&xpc);
8400 	    xpc.xp_context = EXPAND_FILES;
8401 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8402 	    ExpandCleanup(&xpc);
8403 	}
8404 	else
8405 	    rettv->vval.v_string = NULL;
8406     }
8407 }
8408 
8409 /*
8410  * "extend(list, list [, idx])" function
8411  * "extend(dict, dict [, action])" function
8412  */
8413     static void
8414 f_extend(argvars, rettv)
8415     typval_T	*argvars;
8416     typval_T	*rettv;
8417 {
8418     rettv->vval.v_number = 0;
8419     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8420     {
8421 	list_T		*l1, *l2;
8422 	listitem_T	*item;
8423 	long		before;
8424 	int		error = FALSE;
8425 
8426 	l1 = argvars[0].vval.v_list;
8427 	l2 = argvars[1].vval.v_list;
8428 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8429 		&& l2 != NULL)
8430 	{
8431 	    if (argvars[2].v_type != VAR_UNKNOWN)
8432 	    {
8433 		before = get_tv_number_chk(&argvars[2], &error);
8434 		if (error)
8435 		    return;		/* type error; errmsg already given */
8436 
8437 		if (before == l1->lv_len)
8438 		    item = NULL;
8439 		else
8440 		{
8441 		    item = list_find(l1, before);
8442 		    if (item == NULL)
8443 		    {
8444 			EMSGN(_(e_listidx), before);
8445 			return;
8446 		    }
8447 		}
8448 	    }
8449 	    else
8450 		item = NULL;
8451 	    list_extend(l1, l2, item);
8452 
8453 	    copy_tv(&argvars[0], rettv);
8454 	}
8455     }
8456     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8457     {
8458 	dict_T		*d1, *d2;
8459 	dictitem_T	*di1;
8460 	char_u		*action;
8461 	int		i;
8462 	hashitem_T	*hi2;
8463 	int		todo;
8464 
8465 	d1 = argvars[0].vval.v_dict;
8466 	d2 = argvars[1].vval.v_dict;
8467 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8468 		&& d2 != NULL)
8469 	{
8470 	    /* Check the third argument. */
8471 	    if (argvars[2].v_type != VAR_UNKNOWN)
8472 	    {
8473 		static char *(av[]) = {"keep", "force", "error"};
8474 
8475 		action = get_tv_string_chk(&argvars[2]);
8476 		if (action == NULL)
8477 		    return;		/* type error; errmsg already given */
8478 		for (i = 0; i < 3; ++i)
8479 		    if (STRCMP(action, av[i]) == 0)
8480 			break;
8481 		if (i == 3)
8482 		{
8483 		    EMSGN(_(e_invarg2), action);
8484 		    return;
8485 		}
8486 	    }
8487 	    else
8488 		action = (char_u *)"force";
8489 
8490 	    /* Go over all entries in the second dict and add them to the
8491 	     * first dict. */
8492 	    todo = d2->dv_hashtab.ht_used;
8493 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8494 	    {
8495 		if (!HASHITEM_EMPTY(hi2))
8496 		{
8497 		    --todo;
8498 		    di1 = dict_find(d1, hi2->hi_key, -1);
8499 		    if (di1 == NULL)
8500 		    {
8501 			di1 = dictitem_copy(HI2DI(hi2));
8502 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8503 			    dictitem_free(di1);
8504 		    }
8505 		    else if (*action == 'e')
8506 		    {
8507 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8508 			break;
8509 		    }
8510 		    else if (*action == 'f')
8511 		    {
8512 			clear_tv(&di1->di_tv);
8513 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8514 		    }
8515 		}
8516 	    }
8517 
8518 	    copy_tv(&argvars[0], rettv);
8519 	}
8520     }
8521     else
8522 	EMSG2(_(e_listdictarg), "extend()");
8523 }
8524 
8525 /*
8526  * "filereadable()" function
8527  */
8528     static void
8529 f_filereadable(argvars, rettv)
8530     typval_T	*argvars;
8531     typval_T	*rettv;
8532 {
8533     FILE	*fd;
8534     char_u	*p;
8535     int		n;
8536 
8537     p = get_tv_string(&argvars[0]);
8538     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8539     {
8540 	n = TRUE;
8541 	fclose(fd);
8542     }
8543     else
8544 	n = FALSE;
8545 
8546     rettv->vval.v_number = n;
8547 }
8548 
8549 /*
8550  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8551  * rights to write into.
8552  */
8553     static void
8554 f_filewritable(argvars, rettv)
8555     typval_T	*argvars;
8556     typval_T	*rettv;
8557 {
8558     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8559 }
8560 
8561 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8562 
8563     static void
8564 findfilendir(argvars, rettv, dir)
8565     typval_T	*argvars;
8566     typval_T	*rettv;
8567     int		dir;
8568 {
8569 #ifdef FEAT_SEARCHPATH
8570     char_u	*fname;
8571     char_u	*fresult = NULL;
8572     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8573     char_u	*p;
8574     char_u	pathbuf[NUMBUFLEN];
8575     int		count = 1;
8576     int		first = TRUE;
8577 
8578     fname = get_tv_string(&argvars[0]);
8579 
8580     if (argvars[1].v_type != VAR_UNKNOWN)
8581     {
8582 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8583 	if (p == NULL)
8584 	    count = -1;	    /* error */
8585 	else
8586 	{
8587 	    if (*p != NUL)
8588 		path = p;
8589 
8590 	    if (argvars[2].v_type != VAR_UNKNOWN)
8591 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8592 	}
8593     }
8594 
8595     if (*fname != NUL && count >= 0)
8596     {
8597 	do
8598 	{
8599 	    vim_free(fresult);
8600 	    fresult = find_file_in_path_option(first ? fname : NULL,
8601 					       first ? (int)STRLEN(fname) : 0,
8602 					       0, first, path, dir, NULL);
8603 	    first = FALSE;
8604 	} while (--count > 0 && fresult != NULL);
8605     }
8606 
8607     rettv->vval.v_string = fresult;
8608 #else
8609     rettv->vval.v_string = NULL;
8610 #endif
8611     rettv->v_type = VAR_STRING;
8612 }
8613 
8614 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8615 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8616 
8617 /*
8618  * Implementation of map() and filter().
8619  */
8620     static void
8621 filter_map(argvars, rettv, map)
8622     typval_T	*argvars;
8623     typval_T	*rettv;
8624     int		map;
8625 {
8626     char_u	buf[NUMBUFLEN];
8627     char_u	*expr;
8628     listitem_T	*li, *nli;
8629     list_T	*l = NULL;
8630     dictitem_T	*di;
8631     hashtab_T	*ht;
8632     hashitem_T	*hi;
8633     dict_T	*d = NULL;
8634     typval_T	save_val;
8635     typval_T	save_key;
8636     int		rem;
8637     int		todo;
8638     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8639 
8640 
8641     rettv->vval.v_number = 0;
8642     if (argvars[0].v_type == VAR_LIST)
8643     {
8644 	if ((l = argvars[0].vval.v_list) == NULL
8645 		|| (map && tv_check_lock(l->lv_lock, msg)))
8646 	    return;
8647     }
8648     else if (argvars[0].v_type == VAR_DICT)
8649     {
8650 	if ((d = argvars[0].vval.v_dict) == NULL
8651 		|| (map && tv_check_lock(d->dv_lock, msg)))
8652 	    return;
8653     }
8654     else
8655     {
8656 	EMSG2(_(e_listdictarg), msg);
8657 	return;
8658     }
8659 
8660     expr = get_tv_string_buf_chk(&argvars[1], buf);
8661     /* On type errors, the preceding call has already displayed an error
8662      * message.  Avoid a misleading error message for an empty string that
8663      * was not passed as argument. */
8664     if (expr != NULL)
8665     {
8666 	prepare_vimvar(VV_VAL, &save_val);
8667 	expr = skipwhite(expr);
8668 
8669 	if (argvars[0].v_type == VAR_DICT)
8670 	{
8671 	    prepare_vimvar(VV_KEY, &save_key);
8672 	    vimvars[VV_KEY].vv_type = VAR_STRING;
8673 
8674 	    ht = &d->dv_hashtab;
8675 	    hash_lock(ht);
8676 	    todo = ht->ht_used;
8677 	    for (hi = ht->ht_array; todo > 0; ++hi)
8678 	    {
8679 		if (!HASHITEM_EMPTY(hi))
8680 		{
8681 		    --todo;
8682 		    di = HI2DI(hi);
8683 		    if (tv_check_lock(di->di_tv.v_lock, msg))
8684 			break;
8685 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
8686 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL)
8687 			break;
8688 		    if (!map && rem)
8689 			dictitem_remove(d, di);
8690 		    clear_tv(&vimvars[VV_KEY].vv_tv);
8691 		}
8692 	    }
8693 	    hash_unlock(ht);
8694 
8695 	    restore_vimvar(VV_KEY, &save_key);
8696 	}
8697 	else
8698 	{
8699 	    for (li = l->lv_first; li != NULL; li = nli)
8700 	    {
8701 		if (tv_check_lock(li->li_tv.v_lock, msg))
8702 		    break;
8703 		nli = li->li_next;
8704 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL)
8705 		    break;
8706 		if (!map && rem)
8707 		    listitem_remove(l, li);
8708 	    }
8709 	}
8710 
8711 	restore_vimvar(VV_VAL, &save_val);
8712     }
8713 
8714     copy_tv(&argvars[0], rettv);
8715 }
8716 
8717     static int
8718 filter_map_one(tv, expr, map, remp)
8719     typval_T	*tv;
8720     char_u	*expr;
8721     int		map;
8722     int		*remp;
8723 {
8724     typval_T	rettv;
8725     char_u	*s;
8726 
8727     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
8728     s = expr;
8729     if (eval1(&s, &rettv, TRUE) == FAIL)
8730 	return FAIL;
8731     if (*s != NUL)  /* check for trailing chars after expr */
8732     {
8733 	EMSG2(_(e_invexpr2), s);
8734 	return FAIL;
8735     }
8736     if (map)
8737     {
8738 	/* map(): replace the list item value */
8739 	clear_tv(tv);
8740 	*tv = rettv;
8741     }
8742     else
8743     {
8744 	int	    error = FALSE;
8745 
8746 	/* filter(): when expr is zero remove the item */
8747 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
8748 	clear_tv(&rettv);
8749 	/* On type error, nothing has been removed; return FAIL to stop the
8750 	 * loop.  The error message was given by get_tv_number_chk(). */
8751 	if (error)
8752 	    return FAIL;
8753     }
8754     clear_tv(&vimvars[VV_VAL].vv_tv);
8755     return OK;
8756 }
8757 
8758 /*
8759  * "filter()" function
8760  */
8761     static void
8762 f_filter(argvars, rettv)
8763     typval_T	*argvars;
8764     typval_T	*rettv;
8765 {
8766     filter_map(argvars, rettv, FALSE);
8767 }
8768 
8769 /*
8770  * "finddir({fname}[, {path}[, {count}]])" function
8771  */
8772     static void
8773 f_finddir(argvars, rettv)
8774     typval_T	*argvars;
8775     typval_T	*rettv;
8776 {
8777     findfilendir(argvars, rettv, TRUE);
8778 }
8779 
8780 /*
8781  * "findfile({fname}[, {path}[, {count}]])" function
8782  */
8783     static void
8784 f_findfile(argvars, rettv)
8785     typval_T	*argvars;
8786     typval_T	*rettv;
8787 {
8788     findfilendir(argvars, rettv, FALSE);
8789 }
8790 
8791 /*
8792  * "fnamemodify({fname}, {mods})" function
8793  */
8794     static void
8795 f_fnamemodify(argvars, rettv)
8796     typval_T	*argvars;
8797     typval_T	*rettv;
8798 {
8799     char_u	*fname;
8800     char_u	*mods;
8801     int		usedlen = 0;
8802     int		len;
8803     char_u	*fbuf = NULL;
8804     char_u	buf[NUMBUFLEN];
8805 
8806     fname = get_tv_string_chk(&argvars[0]);
8807     mods = get_tv_string_buf_chk(&argvars[1], buf);
8808     if (fname == NULL || mods == NULL)
8809 	fname = NULL;
8810     else
8811     {
8812 	len = (int)STRLEN(fname);
8813 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
8814     }
8815 
8816     rettv->v_type = VAR_STRING;
8817     if (fname == NULL)
8818 	rettv->vval.v_string = NULL;
8819     else
8820 	rettv->vval.v_string = vim_strnsave(fname, len);
8821     vim_free(fbuf);
8822 }
8823 
8824 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
8825 
8826 /*
8827  * "foldclosed()" function
8828  */
8829     static void
8830 foldclosed_both(argvars, rettv, end)
8831     typval_T	*argvars;
8832     typval_T	*rettv;
8833     int		end;
8834 {
8835 #ifdef FEAT_FOLDING
8836     linenr_T	lnum;
8837     linenr_T	first, last;
8838 
8839     lnum = get_tv_lnum(argvars);
8840     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8841     {
8842 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
8843 	{
8844 	    if (end)
8845 		rettv->vval.v_number = (varnumber_T)last;
8846 	    else
8847 		rettv->vval.v_number = (varnumber_T)first;
8848 	    return;
8849 	}
8850     }
8851 #endif
8852     rettv->vval.v_number = -1;
8853 }
8854 
8855 /*
8856  * "foldclosed()" function
8857  */
8858     static void
8859 f_foldclosed(argvars, rettv)
8860     typval_T	*argvars;
8861     typval_T	*rettv;
8862 {
8863     foldclosed_both(argvars, rettv, FALSE);
8864 }
8865 
8866 /*
8867  * "foldclosedend()" function
8868  */
8869     static void
8870 f_foldclosedend(argvars, rettv)
8871     typval_T	*argvars;
8872     typval_T	*rettv;
8873 {
8874     foldclosed_both(argvars, rettv, TRUE);
8875 }
8876 
8877 /*
8878  * "foldlevel()" function
8879  */
8880     static void
8881 f_foldlevel(argvars, rettv)
8882     typval_T	*argvars;
8883     typval_T	*rettv;
8884 {
8885 #ifdef FEAT_FOLDING
8886     linenr_T	lnum;
8887 
8888     lnum = get_tv_lnum(argvars);
8889     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8890 	rettv->vval.v_number = foldLevel(lnum);
8891     else
8892 #endif
8893 	rettv->vval.v_number = 0;
8894 }
8895 
8896 /*
8897  * "foldtext()" function
8898  */
8899 /*ARGSUSED*/
8900     static void
8901 f_foldtext(argvars, rettv)
8902     typval_T	*argvars;
8903     typval_T	*rettv;
8904 {
8905 #ifdef FEAT_FOLDING
8906     linenr_T	lnum;
8907     char_u	*s;
8908     char_u	*r;
8909     int		len;
8910     char	*txt;
8911 #endif
8912 
8913     rettv->v_type = VAR_STRING;
8914     rettv->vval.v_string = NULL;
8915 #ifdef FEAT_FOLDING
8916     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
8917 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
8918 						 <= curbuf->b_ml.ml_line_count
8919 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
8920     {
8921 	/* Find first non-empty line in the fold. */
8922 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
8923 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8924 	{
8925 	    if (!linewhite(lnum))
8926 		break;
8927 	    ++lnum;
8928 	}
8929 
8930 	/* Find interesting text in this line. */
8931 	s = skipwhite(ml_get(lnum));
8932 	/* skip C comment-start */
8933 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
8934 	{
8935 	    s = skipwhite(s + 2);
8936 	    if (*skipwhite(s) == NUL
8937 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
8938 	    {
8939 		s = skipwhite(ml_get(lnum + 1));
8940 		if (*s == '*')
8941 		    s = skipwhite(s + 1);
8942 	    }
8943 	}
8944 	txt = _("+-%s%3ld lines: ");
8945 	r = alloc((unsigned)(STRLEN(txt)
8946 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
8947 		    + 20				    /* for %3ld */
8948 		    + STRLEN(s)));			    /* concatenated */
8949 	if (r != NULL)
8950 	{
8951 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
8952 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
8953 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
8954 	    len = (int)STRLEN(r);
8955 	    STRCAT(r, s);
8956 	    /* remove 'foldmarker' and 'commentstring' */
8957 	    foldtext_cleanup(r + len);
8958 	    rettv->vval.v_string = r;
8959 	}
8960     }
8961 #endif
8962 }
8963 
8964 /*
8965  * "foldtextresult(lnum)" function
8966  */
8967 /*ARGSUSED*/
8968     static void
8969 f_foldtextresult(argvars, rettv)
8970     typval_T	*argvars;
8971     typval_T	*rettv;
8972 {
8973 #ifdef FEAT_FOLDING
8974     linenr_T	lnum;
8975     char_u	*text;
8976     char_u	buf[51];
8977     foldinfo_T  foldinfo;
8978     int		fold_count;
8979 #endif
8980 
8981     rettv->v_type = VAR_STRING;
8982     rettv->vval.v_string = NULL;
8983 #ifdef FEAT_FOLDING
8984     lnum = get_tv_lnum(argvars);
8985     /* treat illegal types and illegal string values for {lnum} the same */
8986     if (lnum < 0)
8987 	lnum = 0;
8988     fold_count = foldedCount(curwin, lnum, &foldinfo);
8989     if (fold_count > 0)
8990     {
8991 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
8992 							      &foldinfo, buf);
8993 	if (text == buf)
8994 	    text = vim_strsave(text);
8995 	rettv->vval.v_string = text;
8996     }
8997 #endif
8998 }
8999 
9000 /*
9001  * "foreground()" function
9002  */
9003 /*ARGSUSED*/
9004     static void
9005 f_foreground(argvars, rettv)
9006     typval_T	*argvars;
9007     typval_T	*rettv;
9008 {
9009     rettv->vval.v_number = 0;
9010 #ifdef FEAT_GUI
9011     if (gui.in_use)
9012 	gui_mch_set_foreground();
9013 #else
9014 # ifdef WIN32
9015     win32_set_foreground();
9016 # endif
9017 #endif
9018 }
9019 
9020 /*
9021  * "function()" function
9022  */
9023 /*ARGSUSED*/
9024     static void
9025 f_function(argvars, rettv)
9026     typval_T	*argvars;
9027     typval_T	*rettv;
9028 {
9029     char_u	*s;
9030 
9031     rettv->vval.v_number = 0;
9032     s = get_tv_string(&argvars[0]);
9033     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9034 	EMSG2(_(e_invarg2), s);
9035     else if (!function_exists(s))
9036 	EMSG2(_("E700: Unknown function: %s"), s);
9037     else
9038     {
9039 	rettv->vval.v_string = vim_strsave(s);
9040 	rettv->v_type = VAR_FUNC;
9041     }
9042 }
9043 
9044 /*
9045  * "garbagecollect()" function
9046  */
9047 /*ARGSUSED*/
9048     static void
9049 f_garbagecollect(argvars, rettv)
9050     typval_T	*argvars;
9051     typval_T	*rettv;
9052 {
9053     garbage_collect();
9054 }
9055 
9056 /*
9057  * "get()" function
9058  */
9059     static void
9060 f_get(argvars, rettv)
9061     typval_T	*argvars;
9062     typval_T	*rettv;
9063 {
9064     listitem_T	*li;
9065     list_T	*l;
9066     dictitem_T	*di;
9067     dict_T	*d;
9068     typval_T	*tv = NULL;
9069 
9070     if (argvars[0].v_type == VAR_LIST)
9071     {
9072 	if ((l = argvars[0].vval.v_list) != NULL)
9073 	{
9074 	    int		error = FALSE;
9075 
9076 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9077 	    if (!error && li != NULL)
9078 		tv = &li->li_tv;
9079 	}
9080     }
9081     else if (argvars[0].v_type == VAR_DICT)
9082     {
9083 	if ((d = argvars[0].vval.v_dict) != NULL)
9084 	{
9085 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9086 	    if (di != NULL)
9087 		tv = &di->di_tv;
9088 	}
9089     }
9090     else
9091 	EMSG2(_(e_listdictarg), "get()");
9092 
9093     if (tv == NULL)
9094     {
9095 	if (argvars[2].v_type == VAR_UNKNOWN)
9096 	    rettv->vval.v_number = 0;
9097 	else
9098 	    copy_tv(&argvars[2], rettv);
9099     }
9100     else
9101 	copy_tv(tv, rettv);
9102 }
9103 
9104 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9105 
9106 /*
9107  * Get line or list of lines from buffer "buf" into "rettv".
9108  * Return a range (from start to end) of lines in rettv from the specified
9109  * buffer.
9110  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9111  */
9112     static void
9113 get_buffer_lines(buf, start, end, retlist, rettv)
9114     buf_T	*buf;
9115     linenr_T	start;
9116     linenr_T	end;
9117     int		retlist;
9118     typval_T	*rettv;
9119 {
9120     char_u	*p;
9121     list_T	*l = NULL;
9122     listitem_T	*li;
9123 
9124     if (retlist)
9125     {
9126 	l = list_alloc();
9127 	if (l == NULL)
9128 	    return;
9129 
9130 	rettv->vval.v_list = l;
9131 	rettv->v_type = VAR_LIST;
9132 	++l->lv_refcount;
9133     }
9134     else
9135 	rettv->vval.v_number = 0;
9136 
9137     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9138 	return;
9139 
9140     if (!retlist)
9141     {
9142 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9143 	    p = ml_get_buf(buf, start, FALSE);
9144 	else
9145 	    p = (char_u *)"";
9146 
9147 	rettv->v_type = VAR_STRING;
9148 	rettv->vval.v_string = vim_strsave(p);
9149     }
9150     else
9151     {
9152 	if (end < start)
9153 	    return;
9154 
9155 	if (start < 1)
9156 	    start = 1;
9157 	if (end > buf->b_ml.ml_line_count)
9158 	    end = buf->b_ml.ml_line_count;
9159 	while (start <= end)
9160 	{
9161 	    li = listitem_alloc();
9162 	    if (li == NULL)
9163 		break;
9164 	    list_append(l, li);
9165 	    li->li_tv.v_type = VAR_STRING;
9166 	    li->li_tv.v_lock = 0;
9167 	    li->li_tv.vval.v_string =
9168 		vim_strsave(ml_get_buf(buf, start++, FALSE));
9169 	}
9170     }
9171 }
9172 
9173 /*
9174  * "getbufline()" function
9175  */
9176     static void
9177 f_getbufline(argvars, rettv)
9178     typval_T	*argvars;
9179     typval_T	*rettv;
9180 {
9181     linenr_T	lnum;
9182     linenr_T	end;
9183     buf_T	*buf;
9184 
9185     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9186     ++emsg_off;
9187     buf = get_buf_tv(&argvars[0]);
9188     --emsg_off;
9189 
9190     lnum = get_tv_lnum(&argvars[1]);
9191     if (argvars[2].v_type == VAR_UNKNOWN)
9192 	end = lnum;
9193     else
9194 	end = get_tv_lnum(&argvars[2]);
9195     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9196 }
9197 
9198 /*
9199  * "getbufvar()" function
9200  */
9201     static void
9202 f_getbufvar(argvars, rettv)
9203     typval_T	*argvars;
9204     typval_T	*rettv;
9205 {
9206     buf_T	*buf;
9207     buf_T	*save_curbuf;
9208     char_u	*varname;
9209     dictitem_T	*v;
9210 
9211     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9212     varname = get_tv_string_chk(&argvars[1]);
9213     ++emsg_off;
9214     buf = get_buf_tv(&argvars[0]);
9215 
9216     rettv->v_type = VAR_STRING;
9217     rettv->vval.v_string = NULL;
9218 
9219     if (buf != NULL && varname != NULL)
9220     {
9221 	if (*varname == '&')	/* buffer-local-option */
9222 	{
9223 	    /* set curbuf to be our buf, temporarily */
9224 	    save_curbuf = curbuf;
9225 	    curbuf = buf;
9226 
9227 	    get_option_tv(&varname, rettv, TRUE);
9228 
9229 	    /* restore previous notion of curbuf */
9230 	    curbuf = save_curbuf;
9231 	}
9232 	else
9233 	{
9234 	    if (*varname == NUL)
9235 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9236 		 * scope prefix before the NUL byte is required by
9237 		 * find_var_in_ht(). */
9238 		varname = (char_u *)"b:" + 2;
9239 	    /* look up the variable */
9240 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9241 	    if (v != NULL)
9242 		copy_tv(&v->di_tv, rettv);
9243 	}
9244     }
9245 
9246     --emsg_off;
9247 }
9248 
9249 /*
9250  * "getchar()" function
9251  */
9252     static void
9253 f_getchar(argvars, rettv)
9254     typval_T	*argvars;
9255     typval_T	*rettv;
9256 {
9257     varnumber_T		n;
9258     int			error = FALSE;
9259 
9260     ++no_mapping;
9261     ++allow_keys;
9262     if (argvars[0].v_type == VAR_UNKNOWN)
9263 	/* getchar(): blocking wait. */
9264 	n = safe_vgetc();
9265     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9266 	/* getchar(1): only check if char avail */
9267 	n = vpeekc();
9268     else if (error || vpeekc() == NUL)
9269 	/* illegal argument or getchar(0) and no char avail: return zero */
9270 	n = 0;
9271     else
9272 	/* getchar(0) and char avail: return char */
9273 	n = safe_vgetc();
9274     --no_mapping;
9275     --allow_keys;
9276 
9277     rettv->vval.v_number = n;
9278     if (IS_SPECIAL(n) || mod_mask != 0)
9279     {
9280 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9281 	int		i = 0;
9282 
9283 	/* Turn a special key into three bytes, plus modifier. */
9284 	if (mod_mask != 0)
9285 	{
9286 	    temp[i++] = K_SPECIAL;
9287 	    temp[i++] = KS_MODIFIER;
9288 	    temp[i++] = mod_mask;
9289 	}
9290 	if (IS_SPECIAL(n))
9291 	{
9292 	    temp[i++] = K_SPECIAL;
9293 	    temp[i++] = K_SECOND(n);
9294 	    temp[i++] = K_THIRD(n);
9295 	}
9296 #ifdef FEAT_MBYTE
9297 	else if (has_mbyte)
9298 	    i += (*mb_char2bytes)(n, temp + i);
9299 #endif
9300 	else
9301 	    temp[i++] = n;
9302 	temp[i++] = NUL;
9303 	rettv->v_type = VAR_STRING;
9304 	rettv->vval.v_string = vim_strsave(temp);
9305     }
9306 }
9307 
9308 /*
9309  * "getcharmod()" function
9310  */
9311 /*ARGSUSED*/
9312     static void
9313 f_getcharmod(argvars, rettv)
9314     typval_T	*argvars;
9315     typval_T	*rettv;
9316 {
9317     rettv->vval.v_number = mod_mask;
9318 }
9319 
9320 /*
9321  * "getcmdline()" function
9322  */
9323 /*ARGSUSED*/
9324     static void
9325 f_getcmdline(argvars, rettv)
9326     typval_T	*argvars;
9327     typval_T	*rettv;
9328 {
9329     rettv->v_type = VAR_STRING;
9330     rettv->vval.v_string = get_cmdline_str();
9331 }
9332 
9333 /*
9334  * "getcmdpos()" function
9335  */
9336 /*ARGSUSED*/
9337     static void
9338 f_getcmdpos(argvars, rettv)
9339     typval_T	*argvars;
9340     typval_T	*rettv;
9341 {
9342     rettv->vval.v_number = get_cmdline_pos() + 1;
9343 }
9344 
9345 /*
9346  * "getcwd()" function
9347  */
9348 /*ARGSUSED*/
9349     static void
9350 f_getcwd(argvars, rettv)
9351     typval_T	*argvars;
9352     typval_T	*rettv;
9353 {
9354     char_u	cwd[MAXPATHL];
9355 
9356     rettv->v_type = VAR_STRING;
9357     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9358 	rettv->vval.v_string = NULL;
9359     else
9360     {
9361 	rettv->vval.v_string = vim_strsave(cwd);
9362 #ifdef BACKSLASH_IN_FILENAME
9363 	if (rettv->vval.v_string != NULL)
9364 	    slash_adjust(rettv->vval.v_string);
9365 #endif
9366     }
9367 }
9368 
9369 /*
9370  * "getfontname()" function
9371  */
9372 /*ARGSUSED*/
9373     static void
9374 f_getfontname(argvars, rettv)
9375     typval_T	*argvars;
9376     typval_T	*rettv;
9377 {
9378     rettv->v_type = VAR_STRING;
9379     rettv->vval.v_string = NULL;
9380 #ifdef FEAT_GUI
9381     if (gui.in_use)
9382     {
9383 	GuiFont font;
9384 	char_u	*name = NULL;
9385 
9386 	if (argvars[0].v_type == VAR_UNKNOWN)
9387 	{
9388 	    /* Get the "Normal" font.  Either the name saved by
9389 	     * hl_set_font_name() or from the font ID. */
9390 	    font = gui.norm_font;
9391 	    name = hl_get_font_name();
9392 	}
9393 	else
9394 	{
9395 	    name = get_tv_string(&argvars[0]);
9396 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9397 		return;
9398 	    font = gui_mch_get_font(name, FALSE);
9399 	    if (font == NOFONT)
9400 		return;	    /* Invalid font name, return empty string. */
9401 	}
9402 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9403 	if (argvars[0].v_type != VAR_UNKNOWN)
9404 	    gui_mch_free_font(font);
9405     }
9406 #endif
9407 }
9408 
9409 /*
9410  * "getfperm({fname})" function
9411  */
9412     static void
9413 f_getfperm(argvars, rettv)
9414     typval_T	*argvars;
9415     typval_T	*rettv;
9416 {
9417     char_u	*fname;
9418     struct stat st;
9419     char_u	*perm = NULL;
9420     char_u	flags[] = "rwx";
9421     int		i;
9422 
9423     fname = get_tv_string(&argvars[0]);
9424 
9425     rettv->v_type = VAR_STRING;
9426     if (mch_stat((char *)fname, &st) >= 0)
9427     {
9428 	perm = vim_strsave((char_u *)"---------");
9429 	if (perm != NULL)
9430 	{
9431 	    for (i = 0; i < 9; i++)
9432 	    {
9433 		if (st.st_mode & (1 << (8 - i)))
9434 		    perm[i] = flags[i % 3];
9435 	    }
9436 	}
9437     }
9438     rettv->vval.v_string = perm;
9439 }
9440 
9441 /*
9442  * "getfsize({fname})" function
9443  */
9444     static void
9445 f_getfsize(argvars, rettv)
9446     typval_T	*argvars;
9447     typval_T	*rettv;
9448 {
9449     char_u	*fname;
9450     struct stat	st;
9451 
9452     fname = get_tv_string(&argvars[0]);
9453 
9454     rettv->v_type = VAR_NUMBER;
9455 
9456     if (mch_stat((char *)fname, &st) >= 0)
9457     {
9458 	if (mch_isdir(fname))
9459 	    rettv->vval.v_number = 0;
9460 	else
9461 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9462     }
9463     else
9464 	  rettv->vval.v_number = -1;
9465 }
9466 
9467 /*
9468  * "getftime({fname})" function
9469  */
9470     static void
9471 f_getftime(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     if (mch_stat((char *)fname, &st) >= 0)
9481 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9482     else
9483 	rettv->vval.v_number = -1;
9484 }
9485 
9486 /*
9487  * "getftype({fname})" function
9488  */
9489     static void
9490 f_getftype(argvars, rettv)
9491     typval_T	*argvars;
9492     typval_T	*rettv;
9493 {
9494     char_u	*fname;
9495     struct stat st;
9496     char_u	*type = NULL;
9497     char	*t;
9498 
9499     fname = get_tv_string(&argvars[0]);
9500 
9501     rettv->v_type = VAR_STRING;
9502     if (mch_lstat((char *)fname, &st) >= 0)
9503     {
9504 #ifdef S_ISREG
9505 	if (S_ISREG(st.st_mode))
9506 	    t = "file";
9507 	else if (S_ISDIR(st.st_mode))
9508 	    t = "dir";
9509 # ifdef S_ISLNK
9510 	else if (S_ISLNK(st.st_mode))
9511 	    t = "link";
9512 # endif
9513 # ifdef S_ISBLK
9514 	else if (S_ISBLK(st.st_mode))
9515 	    t = "bdev";
9516 # endif
9517 # ifdef S_ISCHR
9518 	else if (S_ISCHR(st.st_mode))
9519 	    t = "cdev";
9520 # endif
9521 # ifdef S_ISFIFO
9522 	else if (S_ISFIFO(st.st_mode))
9523 	    t = "fifo";
9524 # endif
9525 # ifdef S_ISSOCK
9526 	else if (S_ISSOCK(st.st_mode))
9527 	    t = "fifo";
9528 # endif
9529 	else
9530 	    t = "other";
9531 #else
9532 # ifdef S_IFMT
9533 	switch (st.st_mode & S_IFMT)
9534 	{
9535 	    case S_IFREG: t = "file"; break;
9536 	    case S_IFDIR: t = "dir"; break;
9537 #  ifdef S_IFLNK
9538 	    case S_IFLNK: t = "link"; break;
9539 #  endif
9540 #  ifdef S_IFBLK
9541 	    case S_IFBLK: t = "bdev"; break;
9542 #  endif
9543 #  ifdef S_IFCHR
9544 	    case S_IFCHR: t = "cdev"; break;
9545 #  endif
9546 #  ifdef S_IFIFO
9547 	    case S_IFIFO: t = "fifo"; break;
9548 #  endif
9549 #  ifdef S_IFSOCK
9550 	    case S_IFSOCK: t = "socket"; break;
9551 #  endif
9552 	    default: t = "other";
9553 	}
9554 # else
9555 	if (mch_isdir(fname))
9556 	    t = "dir";
9557 	else
9558 	    t = "file";
9559 # endif
9560 #endif
9561 	type = vim_strsave((char_u *)t);
9562     }
9563     rettv->vval.v_string = type;
9564 }
9565 
9566 /*
9567  * "getline(lnum, [end])" function
9568  */
9569     static void
9570 f_getline(argvars, rettv)
9571     typval_T	*argvars;
9572     typval_T	*rettv;
9573 {
9574     linenr_T	lnum;
9575     linenr_T	end;
9576     int		retlist;
9577 
9578     lnum = get_tv_lnum(argvars);
9579     if (argvars[1].v_type == VAR_UNKNOWN)
9580     {
9581 	end = 0;
9582 	retlist = FALSE;
9583     }
9584     else
9585     {
9586 	end = get_tv_lnum(&argvars[1]);
9587 	retlist = TRUE;
9588     }
9589 
9590     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9591 }
9592 
9593 /*
9594  * "getqflist()" function
9595  */
9596 /*ARGSUSED*/
9597     static void
9598 f_getqflist(argvars, rettv)
9599     typval_T	*argvars;
9600     typval_T	*rettv;
9601 {
9602 #ifdef FEAT_QUICKFIX
9603     list_T	*l;
9604 #endif
9605 
9606     rettv->vval.v_number = FALSE;
9607 #ifdef FEAT_QUICKFIX
9608     l = list_alloc();
9609     if (l != NULL)
9610     {
9611 	if (get_errorlist(l) != FAIL)
9612 	{
9613 	    rettv->vval.v_list = l;
9614 	    rettv->v_type = VAR_LIST;
9615 	    ++l->lv_refcount;
9616 	}
9617 	else
9618 	    list_free(l);
9619     }
9620 #endif
9621 }
9622 
9623 /*
9624  * "getreg()" function
9625  */
9626     static void
9627 f_getreg(argvars, rettv)
9628     typval_T	*argvars;
9629     typval_T	*rettv;
9630 {
9631     char_u	*strregname;
9632     int		regname;
9633     int		arg2 = FALSE;
9634     int		error = FALSE;
9635 
9636     if (argvars[0].v_type != VAR_UNKNOWN)
9637     {
9638 	strregname = get_tv_string_chk(&argvars[0]);
9639 	error = strregname == NULL;
9640 	if (argvars[1].v_type != VAR_UNKNOWN)
9641 	    arg2 = get_tv_number_chk(&argvars[1], &error);
9642     }
9643     else
9644 	strregname = vimvars[VV_REG].vv_str;
9645     regname = (strregname == NULL ? '"' : *strregname);
9646     if (regname == 0)
9647 	regname = '"';
9648 
9649     rettv->v_type = VAR_STRING;
9650     rettv->vval.v_string = error ? NULL :
9651 				    get_reg_contents(regname, TRUE, arg2);
9652 }
9653 
9654 /*
9655  * "getregtype()" function
9656  */
9657     static void
9658 f_getregtype(argvars, rettv)
9659     typval_T	*argvars;
9660     typval_T	*rettv;
9661 {
9662     char_u	*strregname;
9663     int		regname;
9664     char_u	buf[NUMBUFLEN + 2];
9665     long	reglen = 0;
9666 
9667     if (argvars[0].v_type != VAR_UNKNOWN)
9668     {
9669 	strregname = get_tv_string_chk(&argvars[0]);
9670 	if (strregname == NULL)	    /* type error; errmsg already given */
9671 	{
9672 	    rettv->v_type = VAR_STRING;
9673 	    rettv->vval.v_string = NULL;
9674 	    return;
9675 	}
9676     }
9677     else
9678 	/* Default to v:register */
9679 	strregname = vimvars[VV_REG].vv_str;
9680 
9681     regname = (strregname == NULL ? '"' : *strregname);
9682     if (regname == 0)
9683 	regname = '"';
9684 
9685     buf[0] = NUL;
9686     buf[1] = NUL;
9687     switch (get_reg_type(regname, &reglen))
9688     {
9689 	case MLINE: buf[0] = 'V'; break;
9690 	case MCHAR: buf[0] = 'v'; break;
9691 #ifdef FEAT_VISUAL
9692 	case MBLOCK:
9693 		buf[0] = Ctrl_V;
9694 		sprintf((char *)buf + 1, "%ld", reglen + 1);
9695 		break;
9696 #endif
9697     }
9698     rettv->v_type = VAR_STRING;
9699     rettv->vval.v_string = vim_strsave(buf);
9700 }
9701 
9702 /*
9703  * "getwinposx()" function
9704  */
9705 /*ARGSUSED*/
9706     static void
9707 f_getwinposx(argvars, rettv)
9708     typval_T	*argvars;
9709     typval_T	*rettv;
9710 {
9711     rettv->vval.v_number = -1;
9712 #ifdef FEAT_GUI
9713     if (gui.in_use)
9714     {
9715 	int	    x, y;
9716 
9717 	if (gui_mch_get_winpos(&x, &y) == OK)
9718 	    rettv->vval.v_number = x;
9719     }
9720 #endif
9721 }
9722 
9723 /*
9724  * "getwinposy()" function
9725  */
9726 /*ARGSUSED*/
9727     static void
9728 f_getwinposy(argvars, rettv)
9729     typval_T	*argvars;
9730     typval_T	*rettv;
9731 {
9732     rettv->vval.v_number = -1;
9733 #ifdef FEAT_GUI
9734     if (gui.in_use)
9735     {
9736 	int	    x, y;
9737 
9738 	if (gui_mch_get_winpos(&x, &y) == OK)
9739 	    rettv->vval.v_number = y;
9740     }
9741 #endif
9742 }
9743 
9744 static win_T *find_win_by_nr __ARGS((typval_T *vp));
9745 
9746     static win_T *
9747 find_win_by_nr(vp)
9748     typval_T	*vp;
9749 {
9750 #ifdef FEAT_WINDOWS
9751     win_T	*wp;
9752 #endif
9753     int		nr;
9754 
9755     nr = get_tv_number_chk(vp, NULL);
9756 
9757 #ifdef FEAT_WINDOWS
9758     if (nr < 0)
9759 	return NULL;
9760     if (nr == 0)
9761 	return curwin;
9762 
9763     for (wp = firstwin; wp != NULL; wp = wp->w_next)
9764 	if (--nr <= 0)
9765 	    break;
9766     return wp;
9767 #else
9768     if (nr == 0 || nr == 1)
9769 	return curwin;
9770     return NULL;
9771 #endif
9772 }
9773 
9774 /*
9775  * "getwinvar()" function
9776  */
9777     static void
9778 f_getwinvar(argvars, rettv)
9779     typval_T	*argvars;
9780     typval_T	*rettv;
9781 {
9782     win_T	*win, *oldcurwin;
9783     char_u	*varname;
9784     dictitem_T	*v;
9785 
9786     win = find_win_by_nr(&argvars[0]);
9787     varname = get_tv_string_chk(&argvars[1]);
9788     ++emsg_off;
9789 
9790     rettv->v_type = VAR_STRING;
9791     rettv->vval.v_string = NULL;
9792 
9793     if (win != NULL && varname != NULL)
9794     {
9795 	if (*varname == '&')	/* window-local-option */
9796 	{
9797 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
9798 	     * that we can get buffer-local options. */
9799 	    oldcurwin = curwin;
9800 	    curwin = win;
9801 	    curbuf = win->w_buffer;
9802 
9803 	    get_option_tv(&varname, rettv, 1);
9804 
9805 	    /* restore previous notion of curwin */
9806 	    curwin = oldcurwin;
9807 	    curbuf = curwin->w_buffer;
9808 	}
9809 	else
9810 	{
9811 	    if (*varname == NUL)
9812 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
9813 		 * scope prefix before the NUL byte is required by
9814 		 * find_var_in_ht(). */
9815 		varname = (char_u *)"w:" + 2;
9816 	    /* look up the variable */
9817 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
9818 	    if (v != NULL)
9819 		copy_tv(&v->di_tv, rettv);
9820 	}
9821     }
9822 
9823     --emsg_off;
9824 }
9825 
9826 /*
9827  * "glob()" function
9828  */
9829     static void
9830 f_glob(argvars, rettv)
9831     typval_T	*argvars;
9832     typval_T	*rettv;
9833 {
9834     expand_T	xpc;
9835 
9836     ExpandInit(&xpc);
9837     xpc.xp_context = EXPAND_FILES;
9838     rettv->v_type = VAR_STRING;
9839     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
9840 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
9841     ExpandCleanup(&xpc);
9842 }
9843 
9844 /*
9845  * "globpath()" function
9846  */
9847     static void
9848 f_globpath(argvars, rettv)
9849     typval_T	*argvars;
9850     typval_T	*rettv;
9851 {
9852     char_u	buf1[NUMBUFLEN];
9853     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
9854 
9855     rettv->v_type = VAR_STRING;
9856     if (file == NULL)
9857 	rettv->vval.v_string = NULL;
9858     else
9859 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
9860 }
9861 
9862 /*
9863  * "has()" function
9864  */
9865     static void
9866 f_has(argvars, rettv)
9867     typval_T	*argvars;
9868     typval_T	*rettv;
9869 {
9870     int		i;
9871     char_u	*name;
9872     int		n = FALSE;
9873     static char	*(has_list[]) =
9874     {
9875 #ifdef AMIGA
9876 	"amiga",
9877 # ifdef FEAT_ARP
9878 	"arp",
9879 # endif
9880 #endif
9881 #ifdef __BEOS__
9882 	"beos",
9883 #endif
9884 #ifdef MSDOS
9885 # ifdef DJGPP
9886 	"dos32",
9887 # else
9888 	"dos16",
9889 # endif
9890 #endif
9891 #ifdef MACOS /* TODO: Should we add MACOS_CLASSIC, MACOS_X? (Dany) */
9892 	"mac",
9893 #endif
9894 #if defined(MACOS_X_UNIX)
9895 	"macunix",
9896 #endif
9897 #ifdef OS2
9898 	"os2",
9899 #endif
9900 #ifdef __QNX__
9901 	"qnx",
9902 #endif
9903 #ifdef RISCOS
9904 	"riscos",
9905 #endif
9906 #ifdef UNIX
9907 	"unix",
9908 #endif
9909 #ifdef VMS
9910 	"vms",
9911 #endif
9912 #ifdef WIN16
9913 	"win16",
9914 #endif
9915 #ifdef WIN32
9916 	"win32",
9917 #endif
9918 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
9919 	"win32unix",
9920 #endif
9921 #ifdef WIN64
9922 	"win64",
9923 #endif
9924 #ifdef EBCDIC
9925 	"ebcdic",
9926 #endif
9927 #ifndef CASE_INSENSITIVE_FILENAME
9928 	"fname_case",
9929 #endif
9930 #ifdef FEAT_ARABIC
9931 	"arabic",
9932 #endif
9933 #ifdef FEAT_AUTOCMD
9934 	"autocmd",
9935 #endif
9936 #ifdef FEAT_BEVAL
9937 	"balloon_eval",
9938 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
9939 	"balloon_multiline",
9940 # endif
9941 #endif
9942 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
9943 	"builtin_terms",
9944 # ifdef ALL_BUILTIN_TCAPS
9945 	"all_builtin_terms",
9946 # endif
9947 #endif
9948 #ifdef FEAT_BYTEOFF
9949 	"byte_offset",
9950 #endif
9951 #ifdef FEAT_CINDENT
9952 	"cindent",
9953 #endif
9954 #ifdef FEAT_CLIENTSERVER
9955 	"clientserver",
9956 #endif
9957 #ifdef FEAT_CLIPBOARD
9958 	"clipboard",
9959 #endif
9960 #ifdef FEAT_CMDL_COMPL
9961 	"cmdline_compl",
9962 #endif
9963 #ifdef FEAT_CMDHIST
9964 	"cmdline_hist",
9965 #endif
9966 #ifdef FEAT_COMMENTS
9967 	"comments",
9968 #endif
9969 #ifdef FEAT_CRYPT
9970 	"cryptv",
9971 #endif
9972 #ifdef FEAT_CSCOPE
9973 	"cscope",
9974 #endif
9975 #ifdef DEBUG
9976 	"debug",
9977 #endif
9978 #ifdef FEAT_CON_DIALOG
9979 	"dialog_con",
9980 #endif
9981 #ifdef FEAT_GUI_DIALOG
9982 	"dialog_gui",
9983 #endif
9984 #ifdef FEAT_DIFF
9985 	"diff",
9986 #endif
9987 #ifdef FEAT_DIGRAPHS
9988 	"digraphs",
9989 #endif
9990 #ifdef FEAT_DND
9991 	"dnd",
9992 #endif
9993 #ifdef FEAT_EMACS_TAGS
9994 	"emacs_tags",
9995 #endif
9996 	"eval",	    /* always present, of course! */
9997 #ifdef FEAT_EX_EXTRA
9998 	"ex_extra",
9999 #endif
10000 #ifdef FEAT_SEARCH_EXTRA
10001 	"extra_search",
10002 #endif
10003 #ifdef FEAT_FKMAP
10004 	"farsi",
10005 #endif
10006 #ifdef FEAT_SEARCHPATH
10007 	"file_in_path",
10008 #endif
10009 #if defined(UNIX) && !defined(USE_SYSTEM)
10010 	"filterpipe",
10011 #endif
10012 #ifdef FEAT_FIND_ID
10013 	"find_in_path",
10014 #endif
10015 #ifdef FEAT_FOLDING
10016 	"folding",
10017 #endif
10018 #ifdef FEAT_FOOTER
10019 	"footer",
10020 #endif
10021 #if !defined(USE_SYSTEM) && defined(UNIX)
10022 	"fork",
10023 #endif
10024 #ifdef FEAT_GETTEXT
10025 	"gettext",
10026 #endif
10027 #ifdef FEAT_GUI
10028 	"gui",
10029 #endif
10030 #ifdef FEAT_GUI_ATHENA
10031 # ifdef FEAT_GUI_NEXTAW
10032 	"gui_neXtaw",
10033 # else
10034 	"gui_athena",
10035 # endif
10036 #endif
10037 #ifdef FEAT_GUI_KDE
10038 	"gui_kde",
10039 #endif
10040 #ifdef FEAT_GUI_GTK
10041 	"gui_gtk",
10042 # ifdef HAVE_GTK2
10043 	"gui_gtk2",
10044 # endif
10045 #endif
10046 #ifdef FEAT_GUI_MAC
10047 	"gui_mac",
10048 #endif
10049 #ifdef FEAT_GUI_MOTIF
10050 	"gui_motif",
10051 #endif
10052 #ifdef FEAT_GUI_PHOTON
10053 	"gui_photon",
10054 #endif
10055 #ifdef FEAT_GUI_W16
10056 	"gui_win16",
10057 #endif
10058 #ifdef FEAT_GUI_W32
10059 	"gui_win32",
10060 #endif
10061 #ifdef FEAT_HANGULIN
10062 	"hangul_input",
10063 #endif
10064 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10065 	"iconv",
10066 #endif
10067 #ifdef FEAT_INS_EXPAND
10068 	"insert_expand",
10069 #endif
10070 #ifdef FEAT_JUMPLIST
10071 	"jumplist",
10072 #endif
10073 #ifdef FEAT_KEYMAP
10074 	"keymap",
10075 #endif
10076 #ifdef FEAT_LANGMAP
10077 	"langmap",
10078 #endif
10079 #ifdef FEAT_LIBCALL
10080 	"libcall",
10081 #endif
10082 #ifdef FEAT_LINEBREAK
10083 	"linebreak",
10084 #endif
10085 #ifdef FEAT_LISP
10086 	"lispindent",
10087 #endif
10088 #ifdef FEAT_LISTCMDS
10089 	"listcmds",
10090 #endif
10091 #ifdef FEAT_LOCALMAP
10092 	"localmap",
10093 #endif
10094 #ifdef FEAT_MENU
10095 	"menu",
10096 #endif
10097 #ifdef FEAT_SESSION
10098 	"mksession",
10099 #endif
10100 #ifdef FEAT_MODIFY_FNAME
10101 	"modify_fname",
10102 #endif
10103 #ifdef FEAT_MOUSE
10104 	"mouse",
10105 #endif
10106 #ifdef FEAT_MOUSESHAPE
10107 	"mouseshape",
10108 #endif
10109 #if defined(UNIX) || defined(VMS)
10110 # ifdef FEAT_MOUSE_DEC
10111 	"mouse_dec",
10112 # endif
10113 # ifdef FEAT_MOUSE_GPM
10114 	"mouse_gpm",
10115 # endif
10116 # ifdef FEAT_MOUSE_JSB
10117 	"mouse_jsbterm",
10118 # endif
10119 # ifdef FEAT_MOUSE_NET
10120 	"mouse_netterm",
10121 # endif
10122 # ifdef FEAT_MOUSE_PTERM
10123 	"mouse_pterm",
10124 # endif
10125 # ifdef FEAT_MOUSE_XTERM
10126 	"mouse_xterm",
10127 # endif
10128 #endif
10129 #ifdef FEAT_MBYTE
10130 	"multi_byte",
10131 #endif
10132 #ifdef FEAT_MBYTE_IME
10133 	"multi_byte_ime",
10134 #endif
10135 #ifdef FEAT_MULTI_LANG
10136 	"multi_lang",
10137 #endif
10138 #ifdef FEAT_MZSCHEME
10139 #ifndef DYNAMIC_MZSCHEME
10140 	"mzscheme",
10141 #endif
10142 #endif
10143 #ifdef FEAT_OLE
10144 	"ole",
10145 #endif
10146 #ifdef FEAT_OSFILETYPE
10147 	"osfiletype",
10148 #endif
10149 #ifdef FEAT_PATH_EXTRA
10150 	"path_extra",
10151 #endif
10152 #ifdef FEAT_PERL
10153 #ifndef DYNAMIC_PERL
10154 	"perl",
10155 #endif
10156 #endif
10157 #ifdef FEAT_PYTHON
10158 #ifndef DYNAMIC_PYTHON
10159 	"python",
10160 #endif
10161 #endif
10162 #ifdef FEAT_POSTSCRIPT
10163 	"postscript",
10164 #endif
10165 #ifdef FEAT_PRINTER
10166 	"printer",
10167 #endif
10168 #ifdef FEAT_PROFILE
10169 	"profile",
10170 #endif
10171 #ifdef FEAT_QUICKFIX
10172 	"quickfix",
10173 #endif
10174 #ifdef FEAT_RIGHTLEFT
10175 	"rightleft",
10176 #endif
10177 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10178 	"ruby",
10179 #endif
10180 #ifdef FEAT_SCROLLBIND
10181 	"scrollbind",
10182 #endif
10183 #ifdef FEAT_CMDL_INFO
10184 	"showcmd",
10185 	"cmdline_info",
10186 #endif
10187 #ifdef FEAT_SIGNS
10188 	"signs",
10189 #endif
10190 #ifdef FEAT_SMARTINDENT
10191 	"smartindent",
10192 #endif
10193 #ifdef FEAT_SNIFF
10194 	"sniff",
10195 #endif
10196 #ifdef FEAT_STL_OPT
10197 	"statusline",
10198 #endif
10199 #ifdef FEAT_SUN_WORKSHOP
10200 	"sun_workshop",
10201 #endif
10202 #ifdef FEAT_NETBEANS_INTG
10203 	"netbeans_intg",
10204 #endif
10205 #ifdef FEAT_SYN_HL
10206 	"spell",
10207 #endif
10208 #ifdef FEAT_SYN_HL
10209 	"syntax",
10210 #endif
10211 #if defined(USE_SYSTEM) || !defined(UNIX)
10212 	"system",
10213 #endif
10214 #ifdef FEAT_TAG_BINS
10215 	"tag_binary",
10216 #endif
10217 #ifdef FEAT_TAG_OLDSTATIC
10218 	"tag_old_static",
10219 #endif
10220 #ifdef FEAT_TAG_ANYWHITE
10221 	"tag_any_white",
10222 #endif
10223 #ifdef FEAT_TCL
10224 # ifndef DYNAMIC_TCL
10225 	"tcl",
10226 # endif
10227 #endif
10228 #ifdef TERMINFO
10229 	"terminfo",
10230 #endif
10231 #ifdef FEAT_TERMRESPONSE
10232 	"termresponse",
10233 #endif
10234 #ifdef FEAT_TEXTOBJ
10235 	"textobjects",
10236 #endif
10237 #ifdef HAVE_TGETENT
10238 	"tgetent",
10239 #endif
10240 #ifdef FEAT_TITLE
10241 	"title",
10242 #endif
10243 #ifdef FEAT_TOOLBAR
10244 	"toolbar",
10245 #endif
10246 #ifdef FEAT_USR_CMDS
10247 	"user-commands",    /* was accidentally included in 5.4 */
10248 	"user_commands",
10249 #endif
10250 #ifdef FEAT_VIMINFO
10251 	"viminfo",
10252 #endif
10253 #ifdef FEAT_VERTSPLIT
10254 	"vertsplit",
10255 #endif
10256 #ifdef FEAT_VIRTUALEDIT
10257 	"virtualedit",
10258 #endif
10259 #ifdef FEAT_VISUAL
10260 	"visual",
10261 #endif
10262 #ifdef FEAT_VISUALEXTRA
10263 	"visualextra",
10264 #endif
10265 #ifdef FEAT_VREPLACE
10266 	"vreplace",
10267 #endif
10268 #ifdef FEAT_WILDIGN
10269 	"wildignore",
10270 #endif
10271 #ifdef FEAT_WILDMENU
10272 	"wildmenu",
10273 #endif
10274 #ifdef FEAT_WINDOWS
10275 	"windows",
10276 #endif
10277 #ifdef FEAT_WAK
10278 	"winaltkeys",
10279 #endif
10280 #ifdef FEAT_WRITEBACKUP
10281 	"writebackup",
10282 #endif
10283 #ifdef FEAT_XIM
10284 	"xim",
10285 #endif
10286 #ifdef FEAT_XFONTSET
10287 	"xfontset",
10288 #endif
10289 #ifdef USE_XSMP
10290 	"xsmp",
10291 #endif
10292 #ifdef USE_XSMP_INTERACT
10293 	"xsmp_interact",
10294 #endif
10295 #ifdef FEAT_XCLIPBOARD
10296 	"xterm_clipboard",
10297 #endif
10298 #ifdef FEAT_XTERM_SAVE
10299 	"xterm_save",
10300 #endif
10301 #if defined(UNIX) && defined(FEAT_X11)
10302 	"X11",
10303 #endif
10304 	NULL
10305     };
10306 
10307     name = get_tv_string(&argvars[0]);
10308     for (i = 0; has_list[i] != NULL; ++i)
10309 	if (STRICMP(name, has_list[i]) == 0)
10310 	{
10311 	    n = TRUE;
10312 	    break;
10313 	}
10314 
10315     if (n == FALSE)
10316     {
10317 	if (STRNICMP(name, "patch", 5) == 0)
10318 	    n = has_patch(atoi((char *)name + 5));
10319 	else if (STRICMP(name, "vim_starting") == 0)
10320 	    n = (starting != 0);
10321 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10322 	else if (STRICMP(name, "balloon_multiline") == 0)
10323 	    n = multiline_balloon_available();
10324 #endif
10325 #ifdef DYNAMIC_TCL
10326 	else if (STRICMP(name, "tcl") == 0)
10327 	    n = tcl_enabled(FALSE);
10328 #endif
10329 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10330 	else if (STRICMP(name, "iconv") == 0)
10331 	    n = iconv_enabled(FALSE);
10332 #endif
10333 #ifdef DYNAMIC_MZSCHEME
10334 	else if (STRICMP(name, "mzscheme") == 0)
10335 	    n = mzscheme_enabled(FALSE);
10336 #endif
10337 #ifdef DYNAMIC_RUBY
10338 	else if (STRICMP(name, "ruby") == 0)
10339 	    n = ruby_enabled(FALSE);
10340 #endif
10341 #ifdef DYNAMIC_PYTHON
10342 	else if (STRICMP(name, "python") == 0)
10343 	    n = python_enabled(FALSE);
10344 #endif
10345 #ifdef DYNAMIC_PERL
10346 	else if (STRICMP(name, "perl") == 0)
10347 	    n = perl_enabled(FALSE);
10348 #endif
10349 #ifdef FEAT_GUI
10350 	else if (STRICMP(name, "gui_running") == 0)
10351 	    n = (gui.in_use || gui.starting);
10352 # ifdef FEAT_GUI_W32
10353 	else if (STRICMP(name, "gui_win32s") == 0)
10354 	    n = gui_is_win32s();
10355 # endif
10356 # ifdef FEAT_BROWSE
10357 	else if (STRICMP(name, "browse") == 0)
10358 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10359 # endif
10360 #endif
10361 #ifdef FEAT_SYN_HL
10362 	else if (STRICMP(name, "syntax_items") == 0)
10363 	    n = syntax_present(curbuf);
10364 #endif
10365 #if defined(WIN3264)
10366 	else if (STRICMP(name, "win95") == 0)
10367 	    n = mch_windows95();
10368 #endif
10369 #ifdef FEAT_NETBEANS_INTG
10370 	else if (STRICMP(name, "netbeans_enabled") == 0)
10371 	    n = usingNetbeans;
10372 #endif
10373     }
10374 
10375     rettv->vval.v_number = n;
10376 }
10377 
10378 /*
10379  * "has_key()" function
10380  */
10381     static void
10382 f_has_key(argvars, rettv)
10383     typval_T	*argvars;
10384     typval_T	*rettv;
10385 {
10386     rettv->vval.v_number = 0;
10387     if (argvars[0].v_type != VAR_DICT)
10388     {
10389 	EMSG(_(e_dictreq));
10390 	return;
10391     }
10392     if (argvars[0].vval.v_dict == NULL)
10393 	return;
10394 
10395     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10396 				      get_tv_string(&argvars[1]), -1) != NULL;
10397 }
10398 
10399 /*
10400  * "hasmapto()" function
10401  */
10402     static void
10403 f_hasmapto(argvars, rettv)
10404     typval_T	*argvars;
10405     typval_T	*rettv;
10406 {
10407     char_u	*name;
10408     char_u	*mode;
10409     char_u	buf[NUMBUFLEN];
10410 
10411     name = get_tv_string(&argvars[0]);
10412     if (argvars[1].v_type == VAR_UNKNOWN)
10413 	mode = (char_u *)"nvo";
10414     else
10415 	mode = get_tv_string_buf(&argvars[1], buf);
10416 
10417     if (map_to_exists(name, mode))
10418 	rettv->vval.v_number = TRUE;
10419     else
10420 	rettv->vval.v_number = FALSE;
10421 }
10422 
10423 /*
10424  * "histadd()" function
10425  */
10426 /*ARGSUSED*/
10427     static void
10428 f_histadd(argvars, rettv)
10429     typval_T	*argvars;
10430     typval_T	*rettv;
10431 {
10432 #ifdef FEAT_CMDHIST
10433     int		histype;
10434     char_u	*str;
10435     char_u	buf[NUMBUFLEN];
10436 #endif
10437 
10438     rettv->vval.v_number = FALSE;
10439     if (check_restricted() || check_secure())
10440 	return;
10441 #ifdef FEAT_CMDHIST
10442     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10443     histype = str != NULL ? get_histtype(str) : -1;
10444     if (histype >= 0)
10445     {
10446 	str = get_tv_string_buf(&argvars[1], buf);
10447 	if (*str != NUL)
10448 	{
10449 	    add_to_history(histype, str, FALSE, NUL);
10450 	    rettv->vval.v_number = TRUE;
10451 	    return;
10452 	}
10453     }
10454 #endif
10455 }
10456 
10457 /*
10458  * "histdel()" function
10459  */
10460 /*ARGSUSED*/
10461     static void
10462 f_histdel(argvars, rettv)
10463     typval_T	*argvars;
10464     typval_T	*rettv;
10465 {
10466 #ifdef FEAT_CMDHIST
10467     int		n;
10468     char_u	buf[NUMBUFLEN];
10469     char_u	*str;
10470 
10471     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10472     if (str == NULL)
10473 	n = 0;
10474     else if (argvars[1].v_type == VAR_UNKNOWN)
10475 	/* only one argument: clear entire history */
10476 	n = clr_history(get_histtype(str));
10477     else if (argvars[1].v_type == VAR_NUMBER)
10478 	/* index given: remove that entry */
10479 	n = del_history_idx(get_histtype(str),
10480 					  (int)get_tv_number(&argvars[1]));
10481     else
10482 	/* string given: remove all matching entries */
10483 	n = del_history_entry(get_histtype(str),
10484 				      get_tv_string_buf(&argvars[1], buf));
10485     rettv->vval.v_number = n;
10486 #else
10487     rettv->vval.v_number = 0;
10488 #endif
10489 }
10490 
10491 /*
10492  * "histget()" function
10493  */
10494 /*ARGSUSED*/
10495     static void
10496 f_histget(argvars, rettv)
10497     typval_T	*argvars;
10498     typval_T	*rettv;
10499 {
10500 #ifdef FEAT_CMDHIST
10501     int		type;
10502     int		idx;
10503     char_u	*str;
10504 
10505     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10506     if (str == NULL)
10507 	rettv->vval.v_string = NULL;
10508     else
10509     {
10510 	type = get_histtype(str);
10511 	if (argvars[1].v_type == VAR_UNKNOWN)
10512 	    idx = get_history_idx(type);
10513 	else
10514 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10515 						    /* -1 on type error */
10516 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10517     }
10518 #else
10519     rettv->vval.v_string = NULL;
10520 #endif
10521     rettv->v_type = VAR_STRING;
10522 }
10523 
10524 /*
10525  * "histnr()" function
10526  */
10527 /*ARGSUSED*/
10528     static void
10529 f_histnr(argvars, rettv)
10530     typval_T	*argvars;
10531     typval_T	*rettv;
10532 {
10533     int		i;
10534 
10535 #ifdef FEAT_CMDHIST
10536     char_u	*history = get_tv_string_chk(&argvars[0]);
10537 
10538     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10539     if (i >= HIST_CMD && i < HIST_COUNT)
10540 	i = get_history_idx(i);
10541     else
10542 #endif
10543 	i = -1;
10544     rettv->vval.v_number = i;
10545 }
10546 
10547 /*
10548  * "highlightID(name)" function
10549  */
10550     static void
10551 f_hlID(argvars, rettv)
10552     typval_T	*argvars;
10553     typval_T	*rettv;
10554 {
10555     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10556 }
10557 
10558 /*
10559  * "highlight_exists()" function
10560  */
10561     static void
10562 f_hlexists(argvars, rettv)
10563     typval_T	*argvars;
10564     typval_T	*rettv;
10565 {
10566     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10567 }
10568 
10569 /*
10570  * "hostname()" function
10571  */
10572 /*ARGSUSED*/
10573     static void
10574 f_hostname(argvars, rettv)
10575     typval_T	*argvars;
10576     typval_T	*rettv;
10577 {
10578     char_u hostname[256];
10579 
10580     mch_get_host_name(hostname, 256);
10581     rettv->v_type = VAR_STRING;
10582     rettv->vval.v_string = vim_strsave(hostname);
10583 }
10584 
10585 /*
10586  * iconv() function
10587  */
10588 /*ARGSUSED*/
10589     static void
10590 f_iconv(argvars, rettv)
10591     typval_T	*argvars;
10592     typval_T	*rettv;
10593 {
10594 #ifdef FEAT_MBYTE
10595     char_u	buf1[NUMBUFLEN];
10596     char_u	buf2[NUMBUFLEN];
10597     char_u	*from, *to, *str;
10598     vimconv_T	vimconv;
10599 #endif
10600 
10601     rettv->v_type = VAR_STRING;
10602     rettv->vval.v_string = NULL;
10603 
10604 #ifdef FEAT_MBYTE
10605     str = get_tv_string(&argvars[0]);
10606     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10607     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10608     vimconv.vc_type = CONV_NONE;
10609     convert_setup(&vimconv, from, to);
10610 
10611     /* If the encodings are equal, no conversion needed. */
10612     if (vimconv.vc_type == CONV_NONE)
10613 	rettv->vval.v_string = vim_strsave(str);
10614     else
10615 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10616 
10617     convert_setup(&vimconv, NULL, NULL);
10618     vim_free(from);
10619     vim_free(to);
10620 #endif
10621 }
10622 
10623 /*
10624  * "indent()" function
10625  */
10626     static void
10627 f_indent(argvars, rettv)
10628     typval_T	*argvars;
10629     typval_T	*rettv;
10630 {
10631     linenr_T	lnum;
10632 
10633     lnum = get_tv_lnum(argvars);
10634     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10635 	rettv->vval.v_number = get_indent_lnum(lnum);
10636     else
10637 	rettv->vval.v_number = -1;
10638 }
10639 
10640 /*
10641  * "index()" function
10642  */
10643     static void
10644 f_index(argvars, rettv)
10645     typval_T	*argvars;
10646     typval_T	*rettv;
10647 {
10648     list_T	*l;
10649     listitem_T	*item;
10650     long	idx = 0;
10651     int		ic = FALSE;
10652 
10653     rettv->vval.v_number = -1;
10654     if (argvars[0].v_type != VAR_LIST)
10655     {
10656 	EMSG(_(e_listreq));
10657 	return;
10658     }
10659     l = argvars[0].vval.v_list;
10660     if (l != NULL)
10661     {
10662 	item = l->lv_first;
10663 	if (argvars[2].v_type != VAR_UNKNOWN)
10664 	{
10665 	    int		error = FALSE;
10666 
10667 	    /* Start at specified item.  Use the cached index that list_find()
10668 	     * sets, so that a negative number also works. */
10669 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10670 	    idx = l->lv_idx;
10671 	    if (argvars[3].v_type != VAR_UNKNOWN)
10672 		ic = get_tv_number_chk(&argvars[3], &error);
10673 	    if (error)
10674 		item = NULL;
10675 	}
10676 
10677 	for ( ; item != NULL; item = item->li_next, ++idx)
10678 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10679 	    {
10680 		rettv->vval.v_number = idx;
10681 		break;
10682 	    }
10683     }
10684 }
10685 
10686 static int inputsecret_flag = 0;
10687 
10688 /*
10689  * "input()" function
10690  *     Also handles inputsecret() when inputsecret is set.
10691  */
10692     static void
10693 f_input(argvars, rettv)
10694     typval_T	*argvars;
10695     typval_T	*rettv;
10696 {
10697     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10698     char_u	*p = NULL;
10699     int		c;
10700     char_u	buf[NUMBUFLEN];
10701     int		cmd_silent_save = cmd_silent;
10702     char_u	*defstr = (char_u *)"";
10703 
10704     rettv->v_type = VAR_STRING;
10705 
10706 #ifdef NO_CONSOLE_INPUT
10707     /* While starting up, there is no place to enter text. */
10708     if (no_console_input())
10709     {
10710 	rettv->vval.v_string = NULL;
10711 	return;
10712     }
10713 #endif
10714 
10715     cmd_silent = FALSE;		/* Want to see the prompt. */
10716     if (prompt != NULL)
10717     {
10718 	/* Only the part of the message after the last NL is considered as
10719 	 * prompt for the command line */
10720 	p = vim_strrchr(prompt, '\n');
10721 	if (p == NULL)
10722 	    p = prompt;
10723 	else
10724 	{
10725 	    ++p;
10726 	    c = *p;
10727 	    *p = NUL;
10728 	    msg_start();
10729 	    msg_clr_eos();
10730 	    msg_puts_attr(prompt, echo_attr);
10731 	    msg_didout = FALSE;
10732 	    msg_starthere();
10733 	    *p = c;
10734 	}
10735 	cmdline_row = msg_row;
10736 
10737 	if (argvars[1].v_type != VAR_UNKNOWN)
10738 	{
10739 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10740 	    if (defstr != NULL)
10741 		stuffReadbuffSpec(defstr);
10742 	}
10743 
10744 	if (defstr != NULL)
10745 	    rettv->vval.v_string =
10746 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr);
10747 
10748 	/* since the user typed this, no need to wait for return */
10749 	need_wait_return = FALSE;
10750 	msg_didout = FALSE;
10751     }
10752     cmd_silent = cmd_silent_save;
10753 }
10754 
10755 /*
10756  * "inputdialog()" function
10757  */
10758     static void
10759 f_inputdialog(argvars, rettv)
10760     typval_T	*argvars;
10761     typval_T	*rettv;
10762 {
10763 #if defined(FEAT_GUI_TEXTDIALOG)
10764     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10765     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10766     {
10767 	char_u	*message;
10768 	char_u	buf[NUMBUFLEN];
10769 	char_u	*defstr = (char_u *)"";
10770 
10771 	message = get_tv_string_chk(&argvars[0]);
10772 	if (argvars[1].v_type != VAR_UNKNOWN
10773 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10774 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10775 	else
10776 	    IObuff[0] = NUL;
10777 	if (message != NULL && defstr != NULL
10778 		&& do_dialog(VIM_QUESTION, NULL, message,
10779 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10780 	    rettv->vval.v_string = vim_strsave(IObuff);
10781 	else
10782 	{
10783 	    if (message != NULL && defstr != NULL
10784 					&& argvars[1].v_type != VAR_UNKNOWN
10785 					&& argvars[2].v_type != VAR_UNKNOWN)
10786 		rettv->vval.v_string = vim_strsave(
10787 				      get_tv_string_buf(&argvars[2], buf));
10788 	    else
10789 		rettv->vval.v_string = NULL;
10790 	}
10791 	rettv->v_type = VAR_STRING;
10792     }
10793     else
10794 #endif
10795 	f_input(argvars, rettv);
10796 }
10797 
10798 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10799 
10800 /*
10801  * "inputrestore()" function
10802  */
10803 /*ARGSUSED*/
10804     static void
10805 f_inputrestore(argvars, rettv)
10806     typval_T	*argvars;
10807     typval_T	*rettv;
10808 {
10809     if (ga_userinput.ga_len > 0)
10810     {
10811 	--ga_userinput.ga_len;
10812 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10813 						       + ga_userinput.ga_len);
10814 	rettv->vval.v_number = 0; /* OK */
10815     }
10816     else if (p_verbose > 1)
10817     {
10818 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
10819 	rettv->vval.v_number = 1; /* Failed */
10820     }
10821 }
10822 
10823 /*
10824  * "inputsave()" function
10825  */
10826 /*ARGSUSED*/
10827     static void
10828 f_inputsave(argvars, rettv)
10829     typval_T	*argvars;
10830     typval_T	*rettv;
10831 {
10832     /* Add an entry to the stack of typehead storage. */
10833     if (ga_grow(&ga_userinput, 1) == OK)
10834     {
10835 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
10836 						       + ga_userinput.ga_len);
10837 	++ga_userinput.ga_len;
10838 	rettv->vval.v_number = 0; /* OK */
10839     }
10840     else
10841 	rettv->vval.v_number = 1; /* Failed */
10842 }
10843 
10844 /*
10845  * "inputsecret()" function
10846  */
10847     static void
10848 f_inputsecret(argvars, rettv)
10849     typval_T	*argvars;
10850     typval_T	*rettv;
10851 {
10852     ++cmdline_star;
10853     ++inputsecret_flag;
10854     f_input(argvars, rettv);
10855     --cmdline_star;
10856     --inputsecret_flag;
10857 }
10858 
10859 /*
10860  * "insert()" function
10861  */
10862     static void
10863 f_insert(argvars, rettv)
10864     typval_T	*argvars;
10865     typval_T	*rettv;
10866 {
10867     long	before = 0;
10868     listitem_T	*item;
10869     list_T	*l;
10870     int		error = FALSE;
10871 
10872     rettv->vval.v_number = 0;
10873     if (argvars[0].v_type != VAR_LIST)
10874 	EMSG2(_(e_listarg), "insert()");
10875     else if ((l = argvars[0].vval.v_list) != NULL
10876 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
10877     {
10878 	if (argvars[2].v_type != VAR_UNKNOWN)
10879 	    before = get_tv_number_chk(&argvars[2], &error);
10880 	if (error)
10881 	    return;		/* type error; errmsg already given */
10882 
10883 	if (before == l->lv_len)
10884 	    item = NULL;
10885 	else
10886 	{
10887 	    item = list_find(l, before);
10888 	    if (item == NULL)
10889 	    {
10890 		EMSGN(_(e_listidx), before);
10891 		l = NULL;
10892 	    }
10893 	}
10894 	if (l != NULL)
10895 	{
10896 	    list_insert_tv(l, &argvars[1], item);
10897 	    copy_tv(&argvars[0], rettv);
10898 	}
10899     }
10900 }
10901 
10902 /*
10903  * "isdirectory()" function
10904  */
10905     static void
10906 f_isdirectory(argvars, rettv)
10907     typval_T	*argvars;
10908     typval_T	*rettv;
10909 {
10910     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
10911 }
10912 
10913 /*
10914  * "islocked()" function
10915  */
10916     static void
10917 f_islocked(argvars, rettv)
10918     typval_T	*argvars;
10919     typval_T	*rettv;
10920 {
10921     lval_T	lv;
10922     char_u	*end;
10923     dictitem_T	*di;
10924 
10925     rettv->vval.v_number = -1;
10926     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
10927 							     FNE_CHECK_START);
10928     if (end != NULL && lv.ll_name != NULL)
10929     {
10930 	if (*end != NUL)
10931 	    EMSG(_(e_trailing));
10932 	else
10933 	{
10934 	    if (lv.ll_tv == NULL)
10935 	    {
10936 		if (check_changedtick(lv.ll_name))
10937 		    rettv->vval.v_number = 1;	    /* always locked */
10938 		else
10939 		{
10940 		    di = find_var(lv.ll_name, NULL);
10941 		    if (di != NULL)
10942 		    {
10943 			/* Consider a variable locked when:
10944 			 * 1. the variable itself is locked
10945 			 * 2. the value of the variable is locked.
10946 			 * 3. the List or Dict value is locked.
10947 			 */
10948 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
10949 						  || tv_islocked(&di->di_tv));
10950 		    }
10951 		}
10952 	    }
10953 	    else if (lv.ll_range)
10954 		EMSG(_("E745: Range not allowed"));
10955 	    else if (lv.ll_newkey != NULL)
10956 		EMSG2(_(e_dictkey), lv.ll_newkey);
10957 	    else if (lv.ll_list != NULL)
10958 		/* List item. */
10959 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
10960 	    else
10961 		/* Dictionary item. */
10962 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
10963 	}
10964     }
10965 
10966     clear_lval(&lv);
10967 }
10968 
10969 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
10970 
10971 /*
10972  * Turn a dict into a list:
10973  * "what" == 0: list of keys
10974  * "what" == 1: list of values
10975  * "what" == 2: list of items
10976  */
10977     static void
10978 dict_list(argvars, rettv, what)
10979     typval_T	*argvars;
10980     typval_T	*rettv;
10981     int		what;
10982 {
10983     list_T	*l;
10984     list_T	*l2;
10985     dictitem_T	*di;
10986     hashitem_T	*hi;
10987     listitem_T	*li;
10988     listitem_T	*li2;
10989     dict_T	*d;
10990     int		todo;
10991 
10992     rettv->vval.v_number = 0;
10993     if (argvars[0].v_type != VAR_DICT)
10994     {
10995 	EMSG(_(e_dictreq));
10996 	return;
10997     }
10998     if ((d = argvars[0].vval.v_dict) == NULL)
10999 	return;
11000 
11001     l = list_alloc();
11002     if (l == NULL)
11003 	return;
11004     rettv->v_type = VAR_LIST;
11005     rettv->vval.v_list = l;
11006     ++l->lv_refcount;
11007 
11008     todo = d->dv_hashtab.ht_used;
11009     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11010     {
11011 	if (!HASHITEM_EMPTY(hi))
11012 	{
11013 	    --todo;
11014 	    di = HI2DI(hi);
11015 
11016 	    li = listitem_alloc();
11017 	    if (li == NULL)
11018 		break;
11019 	    list_append(l, li);
11020 
11021 	    if (what == 0)
11022 	    {
11023 		/* keys() */
11024 		li->li_tv.v_type = VAR_STRING;
11025 		li->li_tv.v_lock = 0;
11026 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11027 	    }
11028 	    else if (what == 1)
11029 	    {
11030 		/* values() */
11031 		copy_tv(&di->di_tv, &li->li_tv);
11032 	    }
11033 	    else
11034 	    {
11035 		/* items() */
11036 		l2 = list_alloc();
11037 		li->li_tv.v_type = VAR_LIST;
11038 		li->li_tv.v_lock = 0;
11039 		li->li_tv.vval.v_list = l2;
11040 		if (l2 == NULL)
11041 		    break;
11042 		++l2->lv_refcount;
11043 
11044 		li2 = listitem_alloc();
11045 		if (li2 == NULL)
11046 		    break;
11047 		list_append(l2, li2);
11048 		li2->li_tv.v_type = VAR_STRING;
11049 		li2->li_tv.v_lock = 0;
11050 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11051 
11052 		li2 = listitem_alloc();
11053 		if (li2 == NULL)
11054 		    break;
11055 		list_append(l2, li2);
11056 		copy_tv(&di->di_tv, &li2->li_tv);
11057 	    }
11058 	}
11059     }
11060 }
11061 
11062 /*
11063  * "items(dict)" function
11064  */
11065     static void
11066 f_items(argvars, rettv)
11067     typval_T	*argvars;
11068     typval_T	*rettv;
11069 {
11070     dict_list(argvars, rettv, 2);
11071 }
11072 
11073 /*
11074  * "join()" function
11075  */
11076     static void
11077 f_join(argvars, rettv)
11078     typval_T	*argvars;
11079     typval_T	*rettv;
11080 {
11081     garray_T	ga;
11082     char_u	*sep;
11083 
11084     rettv->vval.v_number = 0;
11085     if (argvars[0].v_type != VAR_LIST)
11086     {
11087 	EMSG(_(e_listreq));
11088 	return;
11089     }
11090     if (argvars[0].vval.v_list == NULL)
11091 	return;
11092     if (argvars[1].v_type == VAR_UNKNOWN)
11093 	sep = (char_u *)" ";
11094     else
11095 	sep = get_tv_string_chk(&argvars[1]);
11096 
11097     rettv->v_type = VAR_STRING;
11098 
11099     if (sep != NULL)
11100     {
11101 	ga_init2(&ga, (int)sizeof(char), 80);
11102 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11103 	ga_append(&ga, NUL);
11104 	rettv->vval.v_string = (char_u *)ga.ga_data;
11105     }
11106     else
11107 	rettv->vval.v_string = NULL;
11108 }
11109 
11110 /*
11111  * "keys()" function
11112  */
11113     static void
11114 f_keys(argvars, rettv)
11115     typval_T	*argvars;
11116     typval_T	*rettv;
11117 {
11118     dict_list(argvars, rettv, 0);
11119 }
11120 
11121 /*
11122  * "last_buffer_nr()" function.
11123  */
11124 /*ARGSUSED*/
11125     static void
11126 f_last_buffer_nr(argvars, rettv)
11127     typval_T	*argvars;
11128     typval_T	*rettv;
11129 {
11130     int		n = 0;
11131     buf_T	*buf;
11132 
11133     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11134 	if (n < buf->b_fnum)
11135 	    n = buf->b_fnum;
11136 
11137     rettv->vval.v_number = n;
11138 }
11139 
11140 /*
11141  * "len()" function
11142  */
11143     static void
11144 f_len(argvars, rettv)
11145     typval_T	*argvars;
11146     typval_T	*rettv;
11147 {
11148     switch (argvars[0].v_type)
11149     {
11150 	case VAR_STRING:
11151 	case VAR_NUMBER:
11152 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11153 					       get_tv_string(&argvars[0]));
11154 	    break;
11155 	case VAR_LIST:
11156 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11157 	    break;
11158 	case VAR_DICT:
11159 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11160 	    break;
11161 	default:
11162 	    EMSG(_("E701: Invalid type for len()"));
11163 	    break;
11164     }
11165 }
11166 
11167 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11168 
11169     static void
11170 libcall_common(argvars, rettv, type)
11171     typval_T	*argvars;
11172     typval_T	*rettv;
11173     int		type;
11174 {
11175 #ifdef FEAT_LIBCALL
11176     char_u		*string_in;
11177     char_u		**string_result;
11178     int			nr_result;
11179 #endif
11180 
11181     rettv->v_type = type;
11182     if (type == VAR_NUMBER)
11183 	rettv->vval.v_number = 0;
11184     else
11185 	rettv->vval.v_string = NULL;
11186 
11187     if (check_restricted() || check_secure())
11188 	return;
11189 
11190 #ifdef FEAT_LIBCALL
11191     /* The first two args must be strings, otherwise its meaningless */
11192     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11193     {
11194 	string_in = NULL;
11195 	if (argvars[2].v_type == VAR_STRING)
11196 	    string_in = argvars[2].vval.v_string;
11197 	if (type == VAR_NUMBER)
11198 	    string_result = NULL;
11199 	else
11200 	    string_result = &rettv->vval.v_string;
11201 	if (mch_libcall(argvars[0].vval.v_string,
11202 			     argvars[1].vval.v_string,
11203 			     string_in,
11204 			     argvars[2].vval.v_number,
11205 			     string_result,
11206 			     &nr_result) == OK
11207 		&& type == VAR_NUMBER)
11208 	    rettv->vval.v_number = nr_result;
11209     }
11210 #endif
11211 }
11212 
11213 /*
11214  * "libcall()" function
11215  */
11216     static void
11217 f_libcall(argvars, rettv)
11218     typval_T	*argvars;
11219     typval_T	*rettv;
11220 {
11221     libcall_common(argvars, rettv, VAR_STRING);
11222 }
11223 
11224 /*
11225  * "libcallnr()" function
11226  */
11227     static void
11228 f_libcallnr(argvars, rettv)
11229     typval_T	*argvars;
11230     typval_T	*rettv;
11231 {
11232     libcall_common(argvars, rettv, VAR_NUMBER);
11233 }
11234 
11235 /*
11236  * "line(string)" function
11237  */
11238     static void
11239 f_line(argvars, rettv)
11240     typval_T	*argvars;
11241     typval_T	*rettv;
11242 {
11243     linenr_T	lnum = 0;
11244     pos_T	*fp;
11245 
11246     fp = var2fpos(&argvars[0], TRUE);
11247     if (fp != NULL)
11248 	lnum = fp->lnum;
11249     rettv->vval.v_number = lnum;
11250 }
11251 
11252 /*
11253  * "line2byte(lnum)" function
11254  */
11255 /*ARGSUSED*/
11256     static void
11257 f_line2byte(argvars, rettv)
11258     typval_T	*argvars;
11259     typval_T	*rettv;
11260 {
11261 #ifndef FEAT_BYTEOFF
11262     rettv->vval.v_number = -1;
11263 #else
11264     linenr_T	lnum;
11265 
11266     lnum = get_tv_lnum(argvars);
11267     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11268 	rettv->vval.v_number = -1;
11269     else
11270 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11271     if (rettv->vval.v_number >= 0)
11272 	++rettv->vval.v_number;
11273 #endif
11274 }
11275 
11276 /*
11277  * "lispindent(lnum)" function
11278  */
11279     static void
11280 f_lispindent(argvars, rettv)
11281     typval_T	*argvars;
11282     typval_T	*rettv;
11283 {
11284 #ifdef FEAT_LISP
11285     pos_T	pos;
11286     linenr_T	lnum;
11287 
11288     pos = curwin->w_cursor;
11289     lnum = get_tv_lnum(argvars);
11290     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11291     {
11292 	curwin->w_cursor.lnum = lnum;
11293 	rettv->vval.v_number = get_lisp_indent();
11294 	curwin->w_cursor = pos;
11295     }
11296     else
11297 #endif
11298 	rettv->vval.v_number = -1;
11299 }
11300 
11301 /*
11302  * "localtime()" function
11303  */
11304 /*ARGSUSED*/
11305     static void
11306 f_localtime(argvars, rettv)
11307     typval_T	*argvars;
11308     typval_T	*rettv;
11309 {
11310     rettv->vval.v_number = (varnumber_T)time(NULL);
11311 }
11312 
11313 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11314 
11315     static void
11316 get_maparg(argvars, rettv, exact)
11317     typval_T	*argvars;
11318     typval_T	*rettv;
11319     int		exact;
11320 {
11321     char_u	*keys;
11322     char_u	*which;
11323     char_u	buf[NUMBUFLEN];
11324     char_u	*keys_buf = NULL;
11325     char_u	*rhs;
11326     int		mode;
11327     garray_T	ga;
11328 
11329     /* return empty string for failure */
11330     rettv->v_type = VAR_STRING;
11331     rettv->vval.v_string = NULL;
11332 
11333     keys = get_tv_string(&argvars[0]);
11334     if (*keys == NUL)
11335 	return;
11336 
11337     if (argvars[1].v_type != VAR_UNKNOWN)
11338 	which = get_tv_string_buf_chk(&argvars[1], buf);
11339     else
11340 	which = (char_u *)"";
11341     if (which == NULL)
11342 	return;
11343 
11344     mode = get_map_mode(&which, 0);
11345 
11346     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11347     rhs = check_map(keys, mode, exact, FALSE);
11348     vim_free(keys_buf);
11349     if (rhs != NULL)
11350     {
11351 	ga_init(&ga);
11352 	ga.ga_itemsize = 1;
11353 	ga.ga_growsize = 40;
11354 
11355 	while (*rhs != NUL)
11356 	    ga_concat(&ga, str2special(&rhs, FALSE));
11357 
11358 	ga_append(&ga, NUL);
11359 	rettv->vval.v_string = (char_u *)ga.ga_data;
11360     }
11361 }
11362 
11363 /*
11364  * "map()" function
11365  */
11366     static void
11367 f_map(argvars, rettv)
11368     typval_T	*argvars;
11369     typval_T	*rettv;
11370 {
11371     filter_map(argvars, rettv, TRUE);
11372 }
11373 
11374 /*
11375  * "maparg()" function
11376  */
11377     static void
11378 f_maparg(argvars, rettv)
11379     typval_T	*argvars;
11380     typval_T	*rettv;
11381 {
11382     get_maparg(argvars, rettv, TRUE);
11383 }
11384 
11385 /*
11386  * "mapcheck()" function
11387  */
11388     static void
11389 f_mapcheck(argvars, rettv)
11390     typval_T	*argvars;
11391     typval_T	*rettv;
11392 {
11393     get_maparg(argvars, rettv, FALSE);
11394 }
11395 
11396 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11397 
11398     static void
11399 find_some_match(argvars, rettv, type)
11400     typval_T	*argvars;
11401     typval_T	*rettv;
11402     int		type;
11403 {
11404     char_u	*str = NULL;
11405     char_u	*expr = NULL;
11406     char_u	*pat;
11407     regmatch_T	regmatch;
11408     char_u	patbuf[NUMBUFLEN];
11409     char_u	strbuf[NUMBUFLEN];
11410     char_u	*save_cpo;
11411     long	start = 0;
11412     long	nth = 1;
11413     int		match = 0;
11414     list_T	*l = NULL;
11415     listitem_T	*li = NULL;
11416     long	idx = 0;
11417     char_u	*tofree = NULL;
11418 
11419     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11420     save_cpo = p_cpo;
11421     p_cpo = (char_u *)"";
11422 
11423     rettv->vval.v_number = -1;
11424     if (type == 3)
11425     {
11426 	/* return empty list when there are no matches */
11427 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11428 	    goto theend;
11429 	rettv->v_type = VAR_LIST;
11430 	++rettv->vval.v_list->lv_refcount;
11431     }
11432     else if (type == 2)
11433     {
11434 	rettv->v_type = VAR_STRING;
11435 	rettv->vval.v_string = NULL;
11436     }
11437 
11438     if (argvars[0].v_type == VAR_LIST)
11439     {
11440 	if ((l = argvars[0].vval.v_list) == NULL)
11441 	    goto theend;
11442 	li = l->lv_first;
11443     }
11444     else
11445 	expr = str = get_tv_string(&argvars[0]);
11446 
11447     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11448     if (pat == NULL)
11449 	goto theend;
11450 
11451     if (argvars[2].v_type != VAR_UNKNOWN)
11452     {
11453 	int	    error = FALSE;
11454 
11455 	start = get_tv_number_chk(&argvars[2], &error);
11456 	if (error)
11457 	    goto theend;
11458 	if (l != NULL)
11459 	{
11460 	    li = list_find(l, start);
11461 	    if (li == NULL)
11462 		goto theend;
11463 	    idx = l->lv_idx;	/* use the cached index */
11464 	}
11465 	else
11466 	{
11467 	    if (start < 0)
11468 		start = 0;
11469 	    if (start > (long)STRLEN(str))
11470 		goto theend;
11471 	    str += start;
11472 	}
11473 
11474 	if (argvars[3].v_type != VAR_UNKNOWN)
11475 	    nth = get_tv_number_chk(&argvars[3], &error);
11476 	if (error)
11477 	    goto theend;
11478     }
11479 
11480     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11481     if (regmatch.regprog != NULL)
11482     {
11483 	regmatch.rm_ic = p_ic;
11484 
11485 	for (;;)
11486 	{
11487 	    if (l != NULL)
11488 	    {
11489 		if (li == NULL)
11490 		{
11491 		    match = FALSE;
11492 		    break;
11493 		}
11494 		vim_free(tofree);
11495 		str = echo_string(&li->li_tv, &tofree, strbuf);
11496 		if (str == NULL)
11497 		    break;
11498 	    }
11499 
11500 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11501 
11502 	    if (match && --nth <= 0)
11503 		break;
11504 	    if (l == NULL && !match)
11505 		break;
11506 
11507 	    /* Advance to just after the match. */
11508 	    if (l != NULL)
11509 	    {
11510 		li = li->li_next;
11511 		++idx;
11512 	    }
11513 	    else
11514 	    {
11515 #ifdef FEAT_MBYTE
11516 		str = regmatch.startp[0] + mb_ptr2len_check(regmatch.startp[0]);
11517 #else
11518 		str = regmatch.startp[0] + 1;
11519 #endif
11520 	    }
11521 	}
11522 
11523 	if (match)
11524 	{
11525 	    if (type == 3)
11526 	    {
11527 		int i;
11528 
11529 		/* return list with matched string and submatches */
11530 		for (i = 0; i < NSUBEXP; ++i)
11531 		{
11532 		    if (regmatch.endp[i] == NULL)
11533 			break;
11534 		    li = listitem_alloc();
11535 		    if (li == NULL)
11536 			break;
11537 		    li->li_tv.v_type = VAR_STRING;
11538 		    li->li_tv.v_lock = 0;
11539 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11540 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11541 		    list_append(rettv->vval.v_list, li);
11542 		}
11543 	    }
11544 	    else if (type == 2)
11545 	    {
11546 		/* return matched string */
11547 		if (l != NULL)
11548 		    copy_tv(&li->li_tv, rettv);
11549 		else
11550 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11551 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11552 	    }
11553 	    else if (l != NULL)
11554 		rettv->vval.v_number = idx;
11555 	    else
11556 	    {
11557 		if (type != 0)
11558 		    rettv->vval.v_number =
11559 				      (varnumber_T)(regmatch.startp[0] - str);
11560 		else
11561 		    rettv->vval.v_number =
11562 					(varnumber_T)(regmatch.endp[0] - str);
11563 		rettv->vval.v_number += str - expr;
11564 	    }
11565 	}
11566 	vim_free(regmatch.regprog);
11567     }
11568 
11569 theend:
11570     vim_free(tofree);
11571     p_cpo = save_cpo;
11572 }
11573 
11574 /*
11575  * "match()" function
11576  */
11577     static void
11578 f_match(argvars, rettv)
11579     typval_T	*argvars;
11580     typval_T	*rettv;
11581 {
11582     find_some_match(argvars, rettv, 1);
11583 }
11584 
11585 /*
11586  * "matchend()" function
11587  */
11588     static void
11589 f_matchend(argvars, rettv)
11590     typval_T	*argvars;
11591     typval_T	*rettv;
11592 {
11593     find_some_match(argvars, rettv, 0);
11594 }
11595 
11596 /*
11597  * "matchlist()" function
11598  */
11599     static void
11600 f_matchlist(argvars, rettv)
11601     typval_T	*argvars;
11602     typval_T	*rettv;
11603 {
11604     find_some_match(argvars, rettv, 3);
11605 }
11606 
11607 /*
11608  * "matchstr()" function
11609  */
11610     static void
11611 f_matchstr(argvars, rettv)
11612     typval_T	*argvars;
11613     typval_T	*rettv;
11614 {
11615     find_some_match(argvars, rettv, 2);
11616 }
11617 
11618 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11619 
11620     static void
11621 max_min(argvars, rettv, domax)
11622     typval_T	*argvars;
11623     typval_T	*rettv;
11624     int		domax;
11625 {
11626     long	n = 0;
11627     long	i;
11628     int		error = FALSE;
11629 
11630     if (argvars[0].v_type == VAR_LIST)
11631     {
11632 	list_T		*l;
11633 	listitem_T	*li;
11634 
11635 	l = argvars[0].vval.v_list;
11636 	if (l != NULL)
11637 	{
11638 	    li = l->lv_first;
11639 	    if (li != NULL)
11640 	    {
11641 		n = get_tv_number_chk(&li->li_tv, &error);
11642 		for (;;)
11643 		{
11644 		    li = li->li_next;
11645 		    if (li == NULL)
11646 			break;
11647 		    i = get_tv_number_chk(&li->li_tv, &error);
11648 		    if (domax ? i > n : i < n)
11649 			n = i;
11650 		}
11651 	    }
11652 	}
11653     }
11654     else if (argvars[0].v_type == VAR_DICT)
11655     {
11656 	dict_T		*d;
11657 	int		first = TRUE;
11658 	hashitem_T	*hi;
11659 	int		todo;
11660 
11661 	d = argvars[0].vval.v_dict;
11662 	if (d != NULL)
11663 	{
11664 	    todo = d->dv_hashtab.ht_used;
11665 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11666 	    {
11667 		if (!HASHITEM_EMPTY(hi))
11668 		{
11669 		    --todo;
11670 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11671 		    if (first)
11672 		    {
11673 			n = i;
11674 			first = FALSE;
11675 		    }
11676 		    else if (domax ? i > n : i < n)
11677 			n = i;
11678 		}
11679 	    }
11680 	}
11681     }
11682     else
11683 	EMSG(_(e_listdictarg));
11684     rettv->vval.v_number = error ? 0 : n;
11685 }
11686 
11687 /*
11688  * "max()" function
11689  */
11690     static void
11691 f_max(argvars, rettv)
11692     typval_T	*argvars;
11693     typval_T	*rettv;
11694 {
11695     max_min(argvars, rettv, TRUE);
11696 }
11697 
11698 /*
11699  * "min()" function
11700  */
11701     static void
11702 f_min(argvars, rettv)
11703     typval_T	*argvars;
11704     typval_T	*rettv;
11705 {
11706     max_min(argvars, rettv, FALSE);
11707 }
11708 
11709 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11710 
11711 /*
11712  * Create the directory in which "dir" is located, and higher levels when
11713  * needed.
11714  */
11715     static int
11716 mkdir_recurse(dir, prot)
11717     char_u	*dir;
11718     int		prot;
11719 {
11720     char_u	*p;
11721     char_u	*updir;
11722     int		r = FAIL;
11723 
11724     /* Get end of directory name in "dir".
11725      * We're done when it's "/" or "c:/". */
11726     p = gettail_sep(dir);
11727     if (p <= get_past_head(dir))
11728 	return OK;
11729 
11730     /* If the directory exists we're done.  Otherwise: create it.*/
11731     updir = vim_strnsave(dir, (int)(p - dir));
11732     if (updir == NULL)
11733 	return FAIL;
11734     if (mch_isdir(updir))
11735 	r = OK;
11736     else if (mkdir_recurse(updir, prot) == OK)
11737 	r = vim_mkdir_emsg(updir, prot);
11738     vim_free(updir);
11739     return r;
11740 }
11741 
11742 #ifdef vim_mkdir
11743 /*
11744  * "mkdir()" function
11745  */
11746     static void
11747 f_mkdir(argvars, rettv)
11748     typval_T	*argvars;
11749     typval_T	*rettv;
11750 {
11751     char_u	*dir;
11752     char_u	buf[NUMBUFLEN];
11753     int		prot = 0755;
11754 
11755     rettv->vval.v_number = FAIL;
11756     if (check_restricted() || check_secure())
11757 	return;
11758 
11759     dir = get_tv_string_buf(&argvars[0], buf);
11760     if (argvars[1].v_type != VAR_UNKNOWN)
11761     {
11762 	if (argvars[2].v_type != VAR_UNKNOWN)
11763 	    prot = get_tv_number_chk(&argvars[2], NULL);
11764 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11765 	    mkdir_recurse(dir, prot);
11766     }
11767     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11768 }
11769 #endif
11770 
11771 /*
11772  * "mode()" function
11773  */
11774 /*ARGSUSED*/
11775     static void
11776 f_mode(argvars, rettv)
11777     typval_T	*argvars;
11778     typval_T	*rettv;
11779 {
11780     char_u	buf[2];
11781 
11782 #ifdef FEAT_VISUAL
11783     if (VIsual_active)
11784     {
11785 	if (VIsual_select)
11786 	    buf[0] = VIsual_mode + 's' - 'v';
11787 	else
11788 	    buf[0] = VIsual_mode;
11789     }
11790     else
11791 #endif
11792 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11793 	buf[0] = 'r';
11794     else if (State & INSERT)
11795     {
11796 	if (State & REPLACE_FLAG)
11797 	    buf[0] = 'R';
11798 	else
11799 	    buf[0] = 'i';
11800     }
11801     else if (State & CMDLINE)
11802 	buf[0] = 'c';
11803     else
11804 	buf[0] = 'n';
11805 
11806     buf[1] = NUL;
11807     rettv->vval.v_string = vim_strsave(buf);
11808     rettv->v_type = VAR_STRING;
11809 }
11810 
11811 /*
11812  * "nextnonblank()" function
11813  */
11814     static void
11815 f_nextnonblank(argvars, rettv)
11816     typval_T	*argvars;
11817     typval_T	*rettv;
11818 {
11819     linenr_T	lnum;
11820 
11821     for (lnum = get_tv_lnum(argvars); ; ++lnum)
11822     {
11823 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
11824 	{
11825 	    lnum = 0;
11826 	    break;
11827 	}
11828 	if (*skipwhite(ml_get(lnum)) != NUL)
11829 	    break;
11830     }
11831     rettv->vval.v_number = lnum;
11832 }
11833 
11834 /*
11835  * "nr2char()" function
11836  */
11837     static void
11838 f_nr2char(argvars, rettv)
11839     typval_T	*argvars;
11840     typval_T	*rettv;
11841 {
11842     char_u	buf[NUMBUFLEN];
11843 
11844 #ifdef FEAT_MBYTE
11845     if (has_mbyte)
11846 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
11847     else
11848 #endif
11849     {
11850 	buf[0] = (char_u)get_tv_number(&argvars[0]);
11851 	buf[1] = NUL;
11852     }
11853     rettv->v_type = VAR_STRING;
11854     rettv->vval.v_string = vim_strsave(buf);
11855 }
11856 
11857 /*
11858  * "prevnonblank()" function
11859  */
11860     static void
11861 f_prevnonblank(argvars, rettv)
11862     typval_T	*argvars;
11863     typval_T	*rettv;
11864 {
11865     linenr_T	lnum;
11866 
11867     lnum = get_tv_lnum(argvars);
11868     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
11869 	lnum = 0;
11870     else
11871 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
11872 	    --lnum;
11873     rettv->vval.v_number = lnum;
11874 }
11875 
11876 /*
11877  * "range()" function
11878  */
11879     static void
11880 f_range(argvars, rettv)
11881     typval_T	*argvars;
11882     typval_T	*rettv;
11883 {
11884     long	start;
11885     long	end;
11886     long	stride = 1;
11887     long	i;
11888     list_T	*l;
11889     listitem_T	*li;
11890     int		error = FALSE;
11891 
11892     start = get_tv_number_chk(&argvars[0], &error);
11893     if (argvars[1].v_type == VAR_UNKNOWN)
11894     {
11895 	end = start - 1;
11896 	start = 0;
11897     }
11898     else
11899     {
11900 	end = get_tv_number_chk(&argvars[1], &error);
11901 	if (argvars[2].v_type != VAR_UNKNOWN)
11902 	    stride = get_tv_number_chk(&argvars[2], &error);
11903     }
11904 
11905     rettv->vval.v_number = 0;
11906     if (error)
11907 	return;		/* type error; errmsg already given */
11908     if (stride == 0)
11909 	EMSG(_("E726: Stride is zero"));
11910     else if (stride > 0 ? end + 1 < start : end - 1 > start)
11911 	EMSG(_("E727: Start past end"));
11912     else
11913     {
11914 	l = list_alloc();
11915 	if (l != NULL)
11916 	{
11917 	    rettv->v_type = VAR_LIST;
11918 	    rettv->vval.v_list = l;
11919 	    ++l->lv_refcount;
11920 
11921 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
11922 	    {
11923 		li = listitem_alloc();
11924 		if (li == NULL)
11925 		    break;
11926 		li->li_tv.v_type = VAR_NUMBER;
11927 		li->li_tv.v_lock = 0;
11928 		li->li_tv.vval.v_number = i;
11929 		list_append(l, li);
11930 	    }
11931 	}
11932     }
11933 }
11934 
11935 /*
11936  * "readfile()" function
11937  */
11938     static void
11939 f_readfile(argvars, rettv)
11940     typval_T	*argvars;
11941     typval_T	*rettv;
11942 {
11943     int		binary = FALSE;
11944     char_u	*fname;
11945     FILE	*fd;
11946     list_T	*l;
11947     listitem_T	*li;
11948 #define FREAD_SIZE 200	    /* optimized for text lines */
11949     char_u	buf[FREAD_SIZE];
11950     int		readlen;    /* size of last fread() */
11951     int		buflen;	    /* nr of valid chars in buf[] */
11952     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
11953     int		tolist;	    /* first byte in buf[] still to be put in list */
11954     int		chop;	    /* how many CR to chop off */
11955     char_u	*prev = NULL;	/* previously read bytes, if any */
11956     int		prevlen = 0;    /* length of "prev" if not NULL */
11957     char_u	*s;
11958     int		len;
11959     long	maxline = MAXLNUM;
11960     long	cnt = 0;
11961 
11962     if (argvars[1].v_type != VAR_UNKNOWN)
11963     {
11964 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
11965 	    binary = TRUE;
11966 	if (argvars[2].v_type != VAR_UNKNOWN)
11967 	    maxline = get_tv_number(&argvars[2]);
11968     }
11969 
11970     l = list_alloc();
11971     if (l == NULL)
11972 	return;
11973     rettv->v_type = VAR_LIST;
11974     rettv->vval.v_list = l;
11975     l->lv_refcount = 1;
11976 
11977     /* Always open the file in binary mode, library functions have a mind of
11978      * their own about CR-LF conversion. */
11979     fname = get_tv_string(&argvars[0]);
11980     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
11981     {
11982 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
11983 	return;
11984     }
11985 
11986     filtd = 0;
11987     while (cnt < maxline || maxline < 0)
11988     {
11989 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
11990 	buflen = filtd + readlen;
11991 	tolist = 0;
11992 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
11993 	{
11994 	    if (buf[filtd] == '\n' || readlen <= 0)
11995 	    {
11996 		/* Only when in binary mode add an empty list item when the
11997 		 * last line ends in a '\n'. */
11998 		if (!binary && readlen == 0 && filtd == 0)
11999 		    break;
12000 
12001 		/* Found end-of-line or end-of-file: add a text line to the
12002 		 * list. */
12003 		chop = 0;
12004 		if (!binary)
12005 		    while (filtd - chop - 1 >= tolist
12006 					  && buf[filtd - chop - 1] == '\r')
12007 			++chop;
12008 		len = filtd - tolist - chop;
12009 		if (prev == NULL)
12010 		    s = vim_strnsave(buf + tolist, len);
12011 		else
12012 		{
12013 		    s = alloc((unsigned)(prevlen + len + 1));
12014 		    if (s != NULL)
12015 		    {
12016 			mch_memmove(s, prev, prevlen);
12017 			vim_free(prev);
12018 			prev = NULL;
12019 			mch_memmove(s + prevlen, buf + tolist, len);
12020 			s[prevlen + len] = NUL;
12021 		    }
12022 		}
12023 		tolist = filtd + 1;
12024 
12025 		li = listitem_alloc();
12026 		if (li == NULL)
12027 		{
12028 		    vim_free(s);
12029 		    break;
12030 		}
12031 		li->li_tv.v_type = VAR_STRING;
12032 		li->li_tv.v_lock = 0;
12033 		li->li_tv.vval.v_string = s;
12034 		list_append(l, li);
12035 
12036 		if (++cnt >= maxline && maxline >= 0)
12037 		    break;
12038 		if (readlen <= 0)
12039 		    break;
12040 	    }
12041 	    else if (buf[filtd] == NUL)
12042 		buf[filtd] = '\n';
12043 	}
12044 	if (readlen <= 0)
12045 	    break;
12046 
12047 	if (tolist == 0)
12048 	{
12049 	    /* "buf" is full, need to move text to an allocated buffer */
12050 	    if (prev == NULL)
12051 	    {
12052 		prev = vim_strnsave(buf, buflen);
12053 		prevlen = buflen;
12054 	    }
12055 	    else
12056 	    {
12057 		s = alloc((unsigned)(prevlen + buflen));
12058 		if (s != NULL)
12059 		{
12060 		    mch_memmove(s, prev, prevlen);
12061 		    mch_memmove(s + prevlen, buf, buflen);
12062 		    vim_free(prev);
12063 		    prev = s;
12064 		    prevlen += buflen;
12065 		}
12066 	    }
12067 	    filtd = 0;
12068 	}
12069 	else
12070 	{
12071 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12072 	    filtd -= tolist;
12073 	}
12074     }
12075 
12076     /*
12077      * For a negative line count use only the lines at the end of the file,
12078      * free the rest.
12079      */
12080     if (maxline < 0)
12081 	while (cnt > -maxline)
12082 	{
12083 	    listitem_remove(l, l->lv_first);
12084 	    --cnt;
12085 	}
12086 
12087     vim_free(prev);
12088     fclose(fd);
12089 }
12090 
12091 
12092 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12093 static void make_connection __ARGS((void));
12094 static int check_connection __ARGS((void));
12095 
12096     static void
12097 make_connection()
12098 {
12099     if (X_DISPLAY == NULL
12100 # ifdef FEAT_GUI
12101 	    && !gui.in_use
12102 # endif
12103 	    )
12104     {
12105 	x_force_connect = TRUE;
12106 	setup_term_clip();
12107 	x_force_connect = FALSE;
12108     }
12109 }
12110 
12111     static int
12112 check_connection()
12113 {
12114     make_connection();
12115     if (X_DISPLAY == NULL)
12116     {
12117 	EMSG(_("E240: No connection to Vim server"));
12118 	return FAIL;
12119     }
12120     return OK;
12121 }
12122 #endif
12123 
12124 #ifdef FEAT_CLIENTSERVER
12125 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12126 
12127     static void
12128 remote_common(argvars, rettv, expr)
12129     typval_T	*argvars;
12130     typval_T	*rettv;
12131     int		expr;
12132 {
12133     char_u	*server_name;
12134     char_u	*keys;
12135     char_u	*r = NULL;
12136     char_u	buf[NUMBUFLEN];
12137 # ifdef WIN32
12138     HWND	w;
12139 # else
12140     Window	w;
12141 # endif
12142 
12143     if (check_restricted() || check_secure())
12144 	return;
12145 
12146 # ifdef FEAT_X11
12147     if (check_connection() == FAIL)
12148 	return;
12149 # endif
12150 
12151     server_name = get_tv_string_chk(&argvars[0]);
12152     if (server_name == NULL)
12153 	return;		/* type error; errmsg already given */
12154     keys = get_tv_string_buf(&argvars[1], buf);
12155 # ifdef WIN32
12156     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12157 # else
12158     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12159 									  < 0)
12160 # endif
12161     {
12162 	if (r != NULL)
12163 	    EMSG(r);		/* sending worked but evaluation failed */
12164 	else
12165 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12166 	return;
12167     }
12168 
12169     rettv->vval.v_string = r;
12170 
12171     if (argvars[2].v_type != VAR_UNKNOWN)
12172     {
12173 	dictitem_T	v;
12174 	char_u		str[30];
12175 	char_u		*idvar;
12176 
12177 	sprintf((char *)str, "0x%x", (unsigned int)w);
12178 	v.di_tv.v_type = VAR_STRING;
12179 	v.di_tv.vval.v_string = vim_strsave(str);
12180 	idvar = get_tv_string_chk(&argvars[2]);
12181 	if (idvar != NULL)
12182 	    set_var(idvar, &v.di_tv, FALSE);
12183 	vim_free(v.di_tv.vval.v_string);
12184     }
12185 }
12186 #endif
12187 
12188 /*
12189  * "remote_expr()" function
12190  */
12191 /*ARGSUSED*/
12192     static void
12193 f_remote_expr(argvars, rettv)
12194     typval_T	*argvars;
12195     typval_T	*rettv;
12196 {
12197     rettv->v_type = VAR_STRING;
12198     rettv->vval.v_string = NULL;
12199 #ifdef FEAT_CLIENTSERVER
12200     remote_common(argvars, rettv, TRUE);
12201 #endif
12202 }
12203 
12204 /*
12205  * "remote_foreground()" function
12206  */
12207 /*ARGSUSED*/
12208     static void
12209 f_remote_foreground(argvars, rettv)
12210     typval_T	*argvars;
12211     typval_T	*rettv;
12212 {
12213     rettv->vval.v_number = 0;
12214 #ifdef FEAT_CLIENTSERVER
12215 # ifdef WIN32
12216     /* On Win32 it's done in this application. */
12217     {
12218 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12219 
12220 	if (server_name != NULL)
12221 	    serverForeground(server_name);
12222     }
12223 # else
12224     /* Send a foreground() expression to the server. */
12225     argvars[1].v_type = VAR_STRING;
12226     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12227     argvars[2].v_type = VAR_UNKNOWN;
12228     remote_common(argvars, rettv, TRUE);
12229     vim_free(argvars[1].vval.v_string);
12230 # endif
12231 #endif
12232 }
12233 
12234 /*ARGSUSED*/
12235     static void
12236 f_remote_peek(argvars, rettv)
12237     typval_T	*argvars;
12238     typval_T	*rettv;
12239 {
12240 #ifdef FEAT_CLIENTSERVER
12241     dictitem_T	v;
12242     char_u	*s = NULL;
12243 # ifdef WIN32
12244     int		n = 0;
12245 # endif
12246     char_u	*serverid;
12247 
12248     if (check_restricted() || check_secure())
12249     {
12250 	rettv->vval.v_number = -1;
12251 	return;
12252     }
12253     serverid = get_tv_string_chk(&argvars[0]);
12254     if (serverid == NULL)
12255     {
12256 	rettv->vval.v_number = -1;
12257 	return;		/* type error; errmsg already given */
12258     }
12259 # ifdef WIN32
12260     sscanf(serverid, "%x", &n);
12261     if (n == 0)
12262 	rettv->vval.v_number = -1;
12263     else
12264     {
12265 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12266 	rettv->vval.v_number = (s != NULL);
12267     }
12268 # else
12269     rettv->vval.v_number = 0;
12270     if (check_connection() == FAIL)
12271 	return;
12272 
12273     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12274 						serverStrToWin(serverid), &s);
12275 # endif
12276 
12277     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12278     {
12279 	char_u		*retvar;
12280 
12281 	v.di_tv.v_type = VAR_STRING;
12282 	v.di_tv.vval.v_string = vim_strsave(s);
12283 	retvar = get_tv_string_chk(&argvars[1]);
12284 	if (retvar != NULL)
12285 	    set_var(retvar, &v.di_tv, FALSE);
12286 	vim_free(v.di_tv.vval.v_string);
12287     }
12288 #else
12289     rettv->vval.v_number = -1;
12290 #endif
12291 }
12292 
12293 /*ARGSUSED*/
12294     static void
12295 f_remote_read(argvars, rettv)
12296     typval_T	*argvars;
12297     typval_T	*rettv;
12298 {
12299     char_u	*r = NULL;
12300 
12301 #ifdef FEAT_CLIENTSERVER
12302     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12303 
12304     if (serverid != NULL && !check_restricted() && !check_secure())
12305     {
12306 # ifdef WIN32
12307 	/* The server's HWND is encoded in the 'id' parameter */
12308 	int		n = 0;
12309 
12310 	sscanf(serverid, "%x", &n);
12311 	if (n != 0)
12312 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12313 	if (r == NULL)
12314 # else
12315 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12316 		serverStrToWin(serverid), &r, FALSE) < 0)
12317 # endif
12318 	    EMSG(_("E277: Unable to read a server reply"));
12319     }
12320 #endif
12321     rettv->v_type = VAR_STRING;
12322     rettv->vval.v_string = r;
12323 }
12324 
12325 /*
12326  * "remote_send()" function
12327  */
12328 /*ARGSUSED*/
12329     static void
12330 f_remote_send(argvars, rettv)
12331     typval_T	*argvars;
12332     typval_T	*rettv;
12333 {
12334     rettv->v_type = VAR_STRING;
12335     rettv->vval.v_string = NULL;
12336 #ifdef FEAT_CLIENTSERVER
12337     remote_common(argvars, rettv, FALSE);
12338 #endif
12339 }
12340 
12341 /*
12342  * "remove()" function
12343  */
12344     static void
12345 f_remove(argvars, rettv)
12346     typval_T	*argvars;
12347     typval_T	*rettv;
12348 {
12349     list_T	*l;
12350     listitem_T	*item, *item2;
12351     listitem_T	*li;
12352     long	idx;
12353     long	end;
12354     char_u	*key;
12355     dict_T	*d;
12356     dictitem_T	*di;
12357 
12358     rettv->vval.v_number = 0;
12359     if (argvars[0].v_type == VAR_DICT)
12360     {
12361 	if (argvars[2].v_type != VAR_UNKNOWN)
12362 	    EMSG2(_(e_toomanyarg), "remove()");
12363 	else if ((d = argvars[0].vval.v_dict) != NULL
12364 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12365 	{
12366 	    key = get_tv_string_chk(&argvars[1]);
12367 	    if (key != NULL)
12368 	    {
12369 		di = dict_find(d, key, -1);
12370 		if (di == NULL)
12371 		    EMSG2(_(e_dictkey), key);
12372 		else
12373 		{
12374 		    *rettv = di->di_tv;
12375 		    init_tv(&di->di_tv);
12376 		    dictitem_remove(d, di);
12377 		}
12378 	    }
12379 	}
12380     }
12381     else if (argvars[0].v_type != VAR_LIST)
12382 	EMSG2(_(e_listdictarg), "remove()");
12383     else if ((l = argvars[0].vval.v_list) != NULL
12384 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12385     {
12386 	int	    error = FALSE;
12387 
12388 	idx = get_tv_number_chk(&argvars[1], &error);
12389 	if (error)
12390 	    ;		/* type error: do nothing, errmsg already given */
12391 	else if ((item = list_find(l, idx)) == NULL)
12392 	    EMSGN(_(e_listidx), idx);
12393 	else
12394 	{
12395 	    if (argvars[2].v_type == VAR_UNKNOWN)
12396 	    {
12397 		/* Remove one item, return its value. */
12398 		list_remove(l, item, item);
12399 		*rettv = item->li_tv;
12400 		vim_free(item);
12401 	    }
12402 	    else
12403 	    {
12404 		/* Remove range of items, return list with values. */
12405 		end = get_tv_number_chk(&argvars[2], &error);
12406 		if (error)
12407 		    ;		/* type error: do nothing */
12408 		else if ((item2 = list_find(l, end)) == NULL)
12409 		    EMSGN(_(e_listidx), end);
12410 		else
12411 		{
12412 		    int	    cnt = 0;
12413 
12414 		    for (li = item; li != NULL; li = li->li_next)
12415 		    {
12416 			++cnt;
12417 			if (li == item2)
12418 			    break;
12419 		    }
12420 		    if (li == NULL)  /* didn't find "item2" after "item" */
12421 			EMSG(_(e_invrange));
12422 		    else
12423 		    {
12424 			list_remove(l, item, item2);
12425 			l = list_alloc();
12426 			if (l != NULL)
12427 			{
12428 			    rettv->v_type = VAR_LIST;
12429 			    rettv->vval.v_list = l;
12430 			    l->lv_first = item;
12431 			    l->lv_last = item2;
12432 			    l->lv_refcount = 1;
12433 			    item->li_prev = NULL;
12434 			    item2->li_next = NULL;
12435 			    l->lv_len = cnt;
12436 			}
12437 		    }
12438 		}
12439 	    }
12440 	}
12441     }
12442 }
12443 
12444 /*
12445  * "rename({from}, {to})" function
12446  */
12447     static void
12448 f_rename(argvars, rettv)
12449     typval_T	*argvars;
12450     typval_T	*rettv;
12451 {
12452     char_u	buf[NUMBUFLEN];
12453 
12454     if (check_restricted() || check_secure())
12455 	rettv->vval.v_number = -1;
12456     else
12457 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12458 				      get_tv_string_buf(&argvars[1], buf));
12459 }
12460 
12461 /*
12462  * "repeat()" function
12463  */
12464 /*ARGSUSED*/
12465     static void
12466 f_repeat(argvars, rettv)
12467     typval_T	*argvars;
12468     typval_T	*rettv;
12469 {
12470     char_u	*p;
12471     int		n;
12472     int		slen;
12473     int		len;
12474     char_u	*r;
12475     int		i;
12476     list_T	*l;
12477 
12478     n = get_tv_number(&argvars[1]);
12479     if (argvars[0].v_type == VAR_LIST)
12480     {
12481 	l = list_alloc();
12482 	if (l != NULL && argvars[0].vval.v_list != NULL)
12483 	{
12484 	    l->lv_refcount = 1;
12485 	    while (n-- > 0)
12486 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12487 		    break;
12488 	}
12489 	rettv->v_type = VAR_LIST;
12490 	rettv->vval.v_list = l;
12491     }
12492     else
12493     {
12494 	p = get_tv_string(&argvars[0]);
12495 	rettv->v_type = VAR_STRING;
12496 	rettv->vval.v_string = NULL;
12497 
12498 	slen = (int)STRLEN(p);
12499 	len = slen * n;
12500 	if (len <= 0)
12501 	    return;
12502 
12503 	r = alloc(len + 1);
12504 	if (r != NULL)
12505 	{
12506 	    for (i = 0; i < n; i++)
12507 		mch_memmove(r + i * slen, p, (size_t)slen);
12508 	    r[len] = NUL;
12509 	}
12510 
12511 	rettv->vval.v_string = r;
12512     }
12513 }
12514 
12515 /*
12516  * "resolve()" function
12517  */
12518     static void
12519 f_resolve(argvars, rettv)
12520     typval_T	*argvars;
12521     typval_T	*rettv;
12522 {
12523     char_u	*p;
12524 
12525     p = get_tv_string(&argvars[0]);
12526 #ifdef FEAT_SHORTCUT
12527     {
12528 	char_u	*v = NULL;
12529 
12530 	v = mch_resolve_shortcut(p);
12531 	if (v != NULL)
12532 	    rettv->vval.v_string = v;
12533 	else
12534 	    rettv->vval.v_string = vim_strsave(p);
12535     }
12536 #else
12537 # ifdef HAVE_READLINK
12538     {
12539 	char_u	buf[MAXPATHL + 1];
12540 	char_u	*cpy;
12541 	int	len;
12542 	char_u	*remain = NULL;
12543 	char_u	*q;
12544 	int	is_relative_to_current = FALSE;
12545 	int	has_trailing_pathsep = FALSE;
12546 	int	limit = 100;
12547 
12548 	p = vim_strsave(p);
12549 
12550 	if (p[0] == '.' && (vim_ispathsep(p[1])
12551 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12552 	    is_relative_to_current = TRUE;
12553 
12554 	len = STRLEN(p);
12555 	if (len > 0 && after_pathsep(p, p + len))
12556 	    has_trailing_pathsep = TRUE;
12557 
12558 	q = getnextcomp(p);
12559 	if (*q != NUL)
12560 	{
12561 	    /* Separate the first path component in "p", and keep the
12562 	     * remainder (beginning with the path separator). */
12563 	    remain = vim_strsave(q - 1);
12564 	    q[-1] = NUL;
12565 	}
12566 
12567 	for (;;)
12568 	{
12569 	    for (;;)
12570 	    {
12571 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12572 		if (len <= 0)
12573 		    break;
12574 		buf[len] = NUL;
12575 
12576 		if (limit-- == 0)
12577 		{
12578 		    vim_free(p);
12579 		    vim_free(remain);
12580 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12581 		    rettv->vval.v_string = NULL;
12582 		    goto fail;
12583 		}
12584 
12585 		/* Ensure that the result will have a trailing path separator
12586 		 * if the argument has one. */
12587 		if (remain == NULL && has_trailing_pathsep)
12588 		    add_pathsep(buf);
12589 
12590 		/* Separate the first path component in the link value and
12591 		 * concatenate the remainders. */
12592 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12593 		if (*q != NUL)
12594 		{
12595 		    if (remain == NULL)
12596 			remain = vim_strsave(q - 1);
12597 		    else
12598 		    {
12599 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12600 			if (cpy != NULL)
12601 			{
12602 			    STRCAT(cpy, remain);
12603 			    vim_free(remain);
12604 			    remain = cpy;
12605 			}
12606 		    }
12607 		    q[-1] = NUL;
12608 		}
12609 
12610 		q = gettail(p);
12611 		if (q > p && *q == NUL)
12612 		{
12613 		    /* Ignore trailing path separator. */
12614 		    q[-1] = NUL;
12615 		    q = gettail(p);
12616 		}
12617 		if (q > p && !mch_isFullName(buf))
12618 		{
12619 		    /* symlink is relative to directory of argument */
12620 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12621 		    if (cpy != NULL)
12622 		    {
12623 			STRCPY(cpy, p);
12624 			STRCPY(gettail(cpy), buf);
12625 			vim_free(p);
12626 			p = cpy;
12627 		    }
12628 		}
12629 		else
12630 		{
12631 		    vim_free(p);
12632 		    p = vim_strsave(buf);
12633 		}
12634 	    }
12635 
12636 	    if (remain == NULL)
12637 		break;
12638 
12639 	    /* Append the first path component of "remain" to "p". */
12640 	    q = getnextcomp(remain + 1);
12641 	    len = q - remain - (*q != NUL);
12642 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12643 	    if (cpy != NULL)
12644 	    {
12645 		STRNCAT(cpy, remain, len);
12646 		vim_free(p);
12647 		p = cpy;
12648 	    }
12649 	    /* Shorten "remain". */
12650 	    if (*q != NUL)
12651 		STRCPY(remain, q - 1);
12652 	    else
12653 	    {
12654 		vim_free(remain);
12655 		remain = NULL;
12656 	    }
12657 	}
12658 
12659 	/* If the result is a relative path name, make it explicitly relative to
12660 	 * the current directory if and only if the argument had this form. */
12661 	if (!vim_ispathsep(*p))
12662 	{
12663 	    if (is_relative_to_current
12664 		    && *p != NUL
12665 		    && !(p[0] == '.'
12666 			&& (p[1] == NUL
12667 			    || vim_ispathsep(p[1])
12668 			    || (p[1] == '.'
12669 				&& (p[2] == NUL
12670 				    || vim_ispathsep(p[2]))))))
12671 	    {
12672 		/* Prepend "./". */
12673 		cpy = concat_str((char_u *)"./", p);
12674 		if (cpy != NULL)
12675 		{
12676 		    vim_free(p);
12677 		    p = cpy;
12678 		}
12679 	    }
12680 	    else if (!is_relative_to_current)
12681 	    {
12682 		/* Strip leading "./". */
12683 		q = p;
12684 		while (q[0] == '.' && vim_ispathsep(q[1]))
12685 		    q += 2;
12686 		if (q > p)
12687 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12688 	    }
12689 	}
12690 
12691 	/* Ensure that the result will have no trailing path separator
12692 	 * if the argument had none.  But keep "/" or "//". */
12693 	if (!has_trailing_pathsep)
12694 	{
12695 	    q = p + STRLEN(p);
12696 	    if (after_pathsep(p, q))
12697 		*gettail_sep(p) = NUL;
12698 	}
12699 
12700 	rettv->vval.v_string = p;
12701     }
12702 # else
12703     rettv->vval.v_string = vim_strsave(p);
12704 # endif
12705 #endif
12706 
12707     simplify_filename(rettv->vval.v_string);
12708 
12709 #ifdef HAVE_READLINK
12710 fail:
12711 #endif
12712     rettv->v_type = VAR_STRING;
12713 }
12714 
12715 /*
12716  * "reverse({list})" function
12717  */
12718     static void
12719 f_reverse(argvars, rettv)
12720     typval_T	*argvars;
12721     typval_T	*rettv;
12722 {
12723     list_T	*l;
12724     listitem_T	*li, *ni;
12725 
12726     rettv->vval.v_number = 0;
12727     if (argvars[0].v_type != VAR_LIST)
12728 	EMSG2(_(e_listarg), "reverse()");
12729     else if ((l = argvars[0].vval.v_list) != NULL
12730 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12731     {
12732 	li = l->lv_last;
12733 	l->lv_first = l->lv_last = NULL;
12734 	l->lv_len = 0;
12735 	while (li != NULL)
12736 	{
12737 	    ni = li->li_prev;
12738 	    list_append(l, li);
12739 	    li = ni;
12740 	}
12741 	rettv->vval.v_list = l;
12742 	rettv->v_type = VAR_LIST;
12743 	++l->lv_refcount;
12744     }
12745 }
12746 
12747 #define SP_NOMOVE	1	/* don't move cursor */
12748 #define SP_REPEAT	2	/* repeat to find outer pair */
12749 #define SP_RETCOUNT	4	/* return matchcount */
12750 #define SP_SETPCMARK	8       /* set previous context mark */
12751 
12752 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12753 
12754 /*
12755  * Get flags for a search function.
12756  * Possibly sets "p_ws".
12757  * Returns BACKWARD, FORWARD or zero (for an error).
12758  */
12759     static int
12760 get_search_arg(varp, flagsp)
12761     typval_T	*varp;
12762     int		*flagsp;
12763 {
12764     int		dir = FORWARD;
12765     char_u	*flags;
12766     char_u	nbuf[NUMBUFLEN];
12767     int		mask;
12768 
12769     if (varp->v_type != VAR_UNKNOWN)
12770     {
12771 	flags = get_tv_string_buf_chk(varp, nbuf);
12772 	if (flags == NULL)
12773 	    return 0;		/* type error; errmsg already given */
12774 	while (*flags != NUL)
12775 	{
12776 	    switch (*flags)
12777 	    {
12778 		case 'b': dir = BACKWARD; break;
12779 		case 'w': p_ws = TRUE; break;
12780 		case 'W': p_ws = FALSE; break;
12781 		default:  mask = 0;
12782 			  if (flagsp != NULL)
12783 			     switch (*flags)
12784 			     {
12785 				 case 'n': mask = SP_NOMOVE; break;
12786 				 case 'r': mask = SP_REPEAT; break;
12787 				 case 'm': mask = SP_RETCOUNT; break;
12788 				 case 's': mask = SP_SETPCMARK; break;
12789 			     }
12790 			  if (mask == 0)
12791 			  {
12792 			      EMSG2(_(e_invarg2), flags);
12793 			      dir = 0;
12794 			  }
12795 			  else
12796 			      *flagsp |= mask;
12797 	    }
12798 	    if (dir == 0)
12799 		break;
12800 	    ++flags;
12801 	}
12802     }
12803     return dir;
12804 }
12805 
12806 /*
12807  * "search()" function
12808  */
12809     static void
12810 f_search(argvars, rettv)
12811     typval_T	*argvars;
12812     typval_T	*rettv;
12813 {
12814     char_u	*pat;
12815     pos_T	pos;
12816     pos_T	save_cursor;
12817     int		save_p_ws = p_ws;
12818     int		dir;
12819     int		flags = 0;
12820 
12821     rettv->vval.v_number = 0;	/* default: FAIL */
12822 
12823     pat = get_tv_string(&argvars[0]);
12824     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
12825     if (dir == 0)
12826 	goto theend;
12827     /*
12828      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
12829      * Check to make sure only those flags are set.
12830      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
12831      * flags cannot be set. Check for that condition also.
12832      */
12833     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
12834 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
12835     {
12836 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12837 	goto theend;
12838     }
12839 
12840     pos = save_cursor = curwin->w_cursor;
12841     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
12842 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
12843     {
12844 	rettv->vval.v_number = pos.lnum;
12845 	if (flags & SP_SETPCMARK)
12846 	    setpcmark();
12847 	curwin->w_cursor = pos;
12848 	/* "/$" will put the cursor after the end of the line, may need to
12849 	 * correct that here */
12850 	check_cursor();
12851     }
12852 
12853     /* If 'n' flag is used: restore cursor position. */
12854     if (flags & SP_NOMOVE)
12855 	curwin->w_cursor = save_cursor;
12856 theend:
12857     p_ws = save_p_ws;
12858 }
12859 
12860 /*
12861  * "searchpair()" function
12862  */
12863     static void
12864 f_searchpair(argvars, rettv)
12865     typval_T	*argvars;
12866     typval_T	*rettv;
12867 {
12868     char_u	*spat, *mpat, *epat;
12869     char_u	*skip;
12870     int		save_p_ws = p_ws;
12871     int		dir;
12872     int		flags = 0;
12873     char_u	nbuf1[NUMBUFLEN];
12874     char_u	nbuf2[NUMBUFLEN];
12875     char_u	nbuf3[NUMBUFLEN];
12876 
12877     rettv->vval.v_number = 0;	/* default: FAIL */
12878 
12879     /* Get the three pattern arguments: start, middle, end. */
12880     spat = get_tv_string_chk(&argvars[0]);
12881     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
12882     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
12883     if (spat == NULL || mpat == NULL || epat == NULL)
12884 	goto theend;	    /* type error */
12885 
12886     /* Handle the optional fourth argument: flags */
12887     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
12888     if (dir == 0)
12889 	goto theend;
12890     /*
12891      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
12892      */
12893     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
12894     {
12895 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
12896 	goto theend;
12897     }
12898 
12899     /* Optional fifth argument: skip expresion */
12900     if (argvars[3].v_type == VAR_UNKNOWN
12901 	    || argvars[4].v_type == VAR_UNKNOWN)
12902 	skip = (char_u *)"";
12903     else
12904 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
12905     if (skip == NULL)
12906 	goto theend;	    /* type error */
12907 
12908     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
12909 
12910 theend:
12911     p_ws = save_p_ws;
12912 }
12913 
12914 /*
12915  * Search for a start/middle/end thing.
12916  * Used by searchpair(), see its documentation for the details.
12917  * Returns 0 or -1 for no match,
12918  */
12919     long
12920 do_searchpair(spat, mpat, epat, dir, skip, flags)
12921     char_u	*spat;	    /* start pattern */
12922     char_u	*mpat;	    /* middle pattern */
12923     char_u	*epat;	    /* end pattern */
12924     int		dir;	    /* BACKWARD or FORWARD */
12925     char_u	*skip;	    /* skip expression */
12926     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
12927 {
12928     char_u	*save_cpo;
12929     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
12930     long	retval = 0;
12931     pos_T	pos;
12932     pos_T	firstpos;
12933     pos_T	foundpos;
12934     pos_T	save_cursor;
12935     pos_T	save_pos;
12936     int		n;
12937     int		r;
12938     int		nest = 1;
12939     int		err;
12940 
12941     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
12942     save_cpo = p_cpo;
12943     p_cpo = (char_u *)"";
12944 
12945     /* Make two search patterns: start/end (pat2, for in nested pairs) and
12946      * start/middle/end (pat3, for the top pair). */
12947     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
12948     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
12949     if (pat2 == NULL || pat3 == NULL)
12950 	goto theend;
12951     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
12952     if (*mpat == NUL)
12953 	STRCPY(pat3, pat2);
12954     else
12955 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
12956 							    spat, epat, mpat);
12957 
12958     save_cursor = curwin->w_cursor;
12959     pos = curwin->w_cursor;
12960     firstpos.lnum = 0;
12961     foundpos.lnum = 0;
12962     pat = pat3;
12963     for (;;)
12964     {
12965 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
12966 						      SEARCH_KEEP, RE_SEARCH);
12967 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
12968 	    /* didn't find it or found the first match again: FAIL */
12969 	    break;
12970 
12971 	if (firstpos.lnum == 0)
12972 	    firstpos = pos;
12973 	if (equalpos(pos, foundpos))
12974 	{
12975 	    /* Found the same position again.  Can happen with a pattern that
12976 	     * has "\zs" at the end and searching backwards.  Advance one
12977 	     * character and try again. */
12978 	    if (dir == BACKWARD)
12979 		decl(&pos);
12980 	    else
12981 		incl(&pos);
12982 	}
12983 	foundpos = pos;
12984 
12985 	/* If the skip pattern matches, ignore this match. */
12986 	if (*skip != NUL)
12987 	{
12988 	    save_pos = curwin->w_cursor;
12989 	    curwin->w_cursor = pos;
12990 	    r = eval_to_bool(skip, &err, NULL, FALSE);
12991 	    curwin->w_cursor = save_pos;
12992 	    if (err)
12993 	    {
12994 		/* Evaluating {skip} caused an error, break here. */
12995 		curwin->w_cursor = save_cursor;
12996 		retval = -1;
12997 		break;
12998 	    }
12999 	    if (r)
13000 		continue;
13001 	}
13002 
13003 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13004 	{
13005 	    /* Found end when searching backwards or start when searching
13006 	     * forward: nested pair. */
13007 	    ++nest;
13008 	    pat = pat2;		/* nested, don't search for middle */
13009 	}
13010 	else
13011 	{
13012 	    /* Found end when searching forward or start when searching
13013 	     * backward: end of (nested) pair; or found middle in outer pair. */
13014 	    if (--nest == 1)
13015 		pat = pat3;	/* outer level, search for middle */
13016 	}
13017 
13018 	if (nest == 0)
13019 	{
13020 	    /* Found the match: return matchcount or line number. */
13021 	    if (flags & SP_RETCOUNT)
13022 		++retval;
13023 	    else
13024 		retval = pos.lnum;
13025 	    if (flags & SP_SETPCMARK)
13026 		setpcmark();
13027 	    curwin->w_cursor = pos;
13028 	    if (!(flags & SP_REPEAT))
13029 		break;
13030 	    nest = 1;	    /* search for next unmatched */
13031 	}
13032     }
13033 
13034     /* If 'n' flag is used or search failed: restore cursor position. */
13035     if ((flags & SP_NOMOVE) || retval == 0)
13036 	curwin->w_cursor = save_cursor;
13037 
13038 theend:
13039     vim_free(pat2);
13040     vim_free(pat3);
13041     p_cpo = save_cpo;
13042 
13043     return retval;
13044 }
13045 
13046 /*ARGSUSED*/
13047     static void
13048 f_server2client(argvars, rettv)
13049     typval_T	*argvars;
13050     typval_T	*rettv;
13051 {
13052 #ifdef FEAT_CLIENTSERVER
13053     char_u	buf[NUMBUFLEN];
13054     char_u	*server = get_tv_string_chk(&argvars[0]);
13055     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13056 
13057     rettv->vval.v_number = -1;
13058     if (server == NULL || reply == NULL)
13059 	return;
13060     if (check_restricted() || check_secure())
13061 	return;
13062 # ifdef FEAT_X11
13063     if (check_connection() == FAIL)
13064 	return;
13065 # endif
13066 
13067     if (serverSendReply(server, reply) < 0)
13068     {
13069 	EMSG(_("E258: Unable to send to client"));
13070 	return;
13071     }
13072     rettv->vval.v_number = 0;
13073 #else
13074     rettv->vval.v_number = -1;
13075 #endif
13076 }
13077 
13078 /*ARGSUSED*/
13079     static void
13080 f_serverlist(argvars, rettv)
13081     typval_T	*argvars;
13082     typval_T	*rettv;
13083 {
13084     char_u	*r = NULL;
13085 
13086 #ifdef FEAT_CLIENTSERVER
13087 # ifdef WIN32
13088     r = serverGetVimNames();
13089 # else
13090     make_connection();
13091     if (X_DISPLAY != NULL)
13092 	r = serverGetVimNames(X_DISPLAY);
13093 # endif
13094 #endif
13095     rettv->v_type = VAR_STRING;
13096     rettv->vval.v_string = r;
13097 }
13098 
13099 /*
13100  * "setbufvar()" function
13101  */
13102 /*ARGSUSED*/
13103     static void
13104 f_setbufvar(argvars, rettv)
13105     typval_T	*argvars;
13106     typval_T	*rettv;
13107 {
13108     buf_T	*buf;
13109 #ifdef FEAT_AUTOCMD
13110     aco_save_T	aco;
13111 #else
13112     buf_T	*save_curbuf;
13113 #endif
13114     char_u	*varname, *bufvarname;
13115     typval_T	*varp;
13116     char_u	nbuf[NUMBUFLEN];
13117 
13118     rettv->vval.v_number = 0;
13119 
13120     if (check_restricted() || check_secure())
13121 	return;
13122     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13123     varname = get_tv_string_chk(&argvars[1]);
13124     buf = get_buf_tv(&argvars[0]);
13125     varp = &argvars[2];
13126 
13127     if (buf != NULL && varname != NULL && varp != NULL)
13128     {
13129 	/* set curbuf to be our buf, temporarily */
13130 #ifdef FEAT_AUTOCMD
13131 	aucmd_prepbuf(&aco, buf);
13132 #else
13133 	save_curbuf = curbuf;
13134 	curbuf = buf;
13135 #endif
13136 
13137 	if (*varname == '&')
13138 	{
13139 	    long	numval;
13140 	    char_u	*strval;
13141 	    int		error = FALSE;
13142 
13143 	    ++varname;
13144 	    numval = get_tv_number_chk(varp, &error);
13145 	    strval = get_tv_string_buf_chk(varp, nbuf);
13146 	    if (!error && strval != NULL)
13147 		set_option_value(varname, numval, strval, OPT_LOCAL);
13148 	}
13149 	else
13150 	{
13151 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13152 	    if (bufvarname != NULL)
13153 	    {
13154 		STRCPY(bufvarname, "b:");
13155 		STRCPY(bufvarname + 2, varname);
13156 		set_var(bufvarname, varp, TRUE);
13157 		vim_free(bufvarname);
13158 	    }
13159 	}
13160 
13161 	/* reset notion of buffer */
13162 #ifdef FEAT_AUTOCMD
13163 	aucmd_restbuf(&aco);
13164 #else
13165 	curbuf = save_curbuf;
13166 #endif
13167     }
13168 }
13169 
13170 /*
13171  * "setcmdpos()" function
13172  */
13173     static void
13174 f_setcmdpos(argvars, rettv)
13175     typval_T	*argvars;
13176     typval_T	*rettv;
13177 {
13178     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13179 
13180     if (pos >= 0)
13181 	rettv->vval.v_number = set_cmdline_pos(pos);
13182 }
13183 
13184 /*
13185  * "setline()" function
13186  */
13187     static void
13188 f_setline(argvars, rettv)
13189     typval_T	*argvars;
13190     typval_T	*rettv;
13191 {
13192     linenr_T	lnum;
13193     char_u	*line = NULL;
13194     list_T	*l = NULL;
13195     listitem_T	*li = NULL;
13196     long	added = 0;
13197     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13198 
13199     lnum = get_tv_lnum(&argvars[0]);
13200     if (argvars[1].v_type == VAR_LIST)
13201     {
13202 	l = argvars[1].vval.v_list;
13203 	li = l->lv_first;
13204     }
13205     else
13206 	line = get_tv_string_chk(&argvars[1]);
13207 
13208     rettv->vval.v_number = 0;		/* OK */
13209     for (;;)
13210     {
13211 	if (l != NULL)
13212 	{
13213 	    /* list argument, get next string */
13214 	    if (li == NULL)
13215 		break;
13216 	    line = get_tv_string_chk(&li->li_tv);
13217 	    li = li->li_next;
13218 	}
13219 
13220 	rettv->vval.v_number = 1;	/* FAIL */
13221 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13222 	    break;
13223 	if (lnum <= curbuf->b_ml.ml_line_count)
13224 	{
13225 	    /* existing line, replace it */
13226 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13227 	    {
13228 		changed_bytes(lnum, 0);
13229 		check_cursor_col();
13230 		rettv->vval.v_number = 0;	/* OK */
13231 	    }
13232 	}
13233 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13234 	{
13235 	    /* lnum is one past the last line, append the line */
13236 	    ++added;
13237 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13238 		rettv->vval.v_number = 0;	/* OK */
13239 	}
13240 
13241 	if (l == NULL)			/* only one string argument */
13242 	    break;
13243 	++lnum;
13244     }
13245 
13246     if (added > 0)
13247 	appended_lines_mark(lcount, added);
13248 }
13249 
13250 /*
13251  * "setqflist()" function
13252  */
13253 /*ARGSUSED*/
13254     static void
13255 f_setqflist(argvars, rettv)
13256     typval_T	*argvars;
13257     typval_T	*rettv;
13258 {
13259     char_u	*act;
13260     int		action = ' ';
13261 
13262     rettv->vval.v_number = -1;
13263 
13264 #ifdef FEAT_QUICKFIX
13265     if (argvars[0].v_type != VAR_LIST)
13266 	EMSG(_(e_listreq));
13267     else
13268     {
13269 	list_T  *l = argvars[0].vval.v_list;
13270 
13271 	if (argvars[1].v_type == VAR_STRING)
13272 	{
13273 	    act = get_tv_string_chk(&argvars[1]);
13274 	    if (act == NULL)
13275 		return;		/* type error; errmsg already given */
13276 	    if (*act == 'a' || *act == 'r')
13277 		action = *act;
13278 	}
13279 
13280 	if (l != NULL && set_errorlist(l, action) == OK)
13281 	    rettv->vval.v_number = 0;
13282     }
13283 #endif
13284 }
13285 
13286 /*
13287  * "setreg()" function
13288  */
13289     static void
13290 f_setreg(argvars, rettv)
13291     typval_T	*argvars;
13292     typval_T	*rettv;
13293 {
13294     int		regname;
13295     char_u	*strregname;
13296     char_u	*stropt;
13297     char_u	*strval;
13298     int		append;
13299     char_u	yank_type;
13300     long	block_len;
13301 
13302     block_len = -1;
13303     yank_type = MAUTO;
13304     append = FALSE;
13305 
13306     strregname = get_tv_string_chk(argvars);
13307     rettv->vval.v_number = 1;		/* FAIL is default */
13308 
13309     if (strregname == NULL)
13310 	return;		/* type error; errmsg already given */
13311     regname = *strregname;
13312     if (regname == 0 || regname == '@')
13313 	regname = '"';
13314     else if (regname == '=')
13315 	return;
13316 
13317     if (argvars[2].v_type != VAR_UNKNOWN)
13318     {
13319 	stropt = get_tv_string_chk(&argvars[2]);
13320 	if (stropt == NULL)
13321 	    return;		/* type error */
13322 	for (; *stropt != NUL; ++stropt)
13323 	    switch (*stropt)
13324 	    {
13325 		case 'a': case 'A':	/* append */
13326 		    append = TRUE;
13327 		    break;
13328 		case 'v': case 'c':	/* character-wise selection */
13329 		    yank_type = MCHAR;
13330 		    break;
13331 		case 'V': case 'l':	/* line-wise selection */
13332 		    yank_type = MLINE;
13333 		    break;
13334 #ifdef FEAT_VISUAL
13335 		case 'b': case Ctrl_V:	/* block-wise selection */
13336 		    yank_type = MBLOCK;
13337 		    if (VIM_ISDIGIT(stropt[1]))
13338 		    {
13339 			++stropt;
13340 			block_len = getdigits(&stropt) - 1;
13341 			--stropt;
13342 		    }
13343 		    break;
13344 #endif
13345 	    }
13346     }
13347 
13348     strval = get_tv_string_chk(&argvars[1]);
13349     if (strval != NULL)
13350 	write_reg_contents_ex(regname, strval, -1,
13351 						append, yank_type, block_len);
13352     rettv->vval.v_number = 0;
13353 }
13354 
13355 
13356 /*
13357  * "setwinvar(expr)" function
13358  */
13359 /*ARGSUSED*/
13360     static void
13361 f_setwinvar(argvars, rettv)
13362     typval_T	*argvars;
13363     typval_T	*rettv;
13364 {
13365     win_T	*win;
13366 #ifdef FEAT_WINDOWS
13367     win_T	*save_curwin;
13368 #endif
13369     char_u	*varname, *winvarname;
13370     typval_T	*varp;
13371     char_u	nbuf[NUMBUFLEN];
13372 
13373     rettv->vval.v_number = 0;
13374 
13375     if (check_restricted() || check_secure())
13376 	return;
13377     win = find_win_by_nr(&argvars[0]);
13378     varname = get_tv_string_chk(&argvars[1]);
13379     varp = &argvars[2];
13380 
13381     if (win != NULL && varname != NULL && varp != NULL)
13382     {
13383 #ifdef FEAT_WINDOWS
13384 	/* set curwin to be our win, temporarily */
13385 	save_curwin = curwin;
13386 	curwin = win;
13387 	curbuf = curwin->w_buffer;
13388 #endif
13389 
13390 	if (*varname == '&')
13391 	{
13392 	    long	numval;
13393 	    char_u	*strval;
13394 	    int		error = FALSE;
13395 
13396 	    ++varname;
13397 	    numval = get_tv_number_chk(varp, &error);
13398 	    strval = get_tv_string_buf_chk(varp, nbuf);
13399 	    if (!error && strval != NULL)
13400 		set_option_value(varname, numval, strval, OPT_LOCAL);
13401 	}
13402 	else
13403 	{
13404 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13405 	    if (winvarname != NULL)
13406 	    {
13407 		STRCPY(winvarname, "w:");
13408 		STRCPY(winvarname + 2, varname);
13409 		set_var(winvarname, varp, TRUE);
13410 		vim_free(winvarname);
13411 	    }
13412 	}
13413 
13414 #ifdef FEAT_WINDOWS
13415 	/* Restore current window, if it's still valid (autocomands can make
13416 	 * it invalid). */
13417 	if (win_valid(save_curwin))
13418 	{
13419 	    curwin = save_curwin;
13420 	    curbuf = curwin->w_buffer;
13421 	}
13422 #endif
13423     }
13424 }
13425 
13426 /*
13427  * "simplify()" function
13428  */
13429     static void
13430 f_simplify(argvars, rettv)
13431     typval_T	*argvars;
13432     typval_T	*rettv;
13433 {
13434     char_u	*p;
13435 
13436     p = get_tv_string(&argvars[0]);
13437     rettv->vval.v_string = vim_strsave(p);
13438     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13439     rettv->v_type = VAR_STRING;
13440 }
13441 
13442 static int
13443 #ifdef __BORLANDC__
13444     _RTLENTRYF
13445 #endif
13446 	item_compare __ARGS((const void *s1, const void *s2));
13447 static int
13448 #ifdef __BORLANDC__
13449     _RTLENTRYF
13450 #endif
13451 	item_compare2 __ARGS((const void *s1, const void *s2));
13452 
13453 static int	item_compare_ic;
13454 static char_u	*item_compare_func;
13455 static int	item_compare_func_err;
13456 #define ITEM_COMPARE_FAIL 999
13457 
13458 /*
13459  * Compare functions for f_sort() below.
13460  */
13461     static int
13462 #ifdef __BORLANDC__
13463 _RTLENTRYF
13464 #endif
13465 item_compare(s1, s2)
13466     const void	*s1;
13467     const void	*s2;
13468 {
13469     char_u	*p1, *p2;
13470     char_u	*tofree1, *tofree2;
13471     int		res;
13472     char_u	numbuf1[NUMBUFLEN];
13473     char_u	numbuf2[NUMBUFLEN];
13474 
13475     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13476     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13477     if (item_compare_ic)
13478 	res = STRICMP(p1, p2);
13479     else
13480 	res = STRCMP(p1, p2);
13481     vim_free(tofree1);
13482     vim_free(tofree2);
13483     return res;
13484 }
13485 
13486     static int
13487 #ifdef __BORLANDC__
13488 _RTLENTRYF
13489 #endif
13490 item_compare2(s1, s2)
13491     const void	*s1;
13492     const void	*s2;
13493 {
13494     int		res;
13495     typval_T	rettv;
13496     typval_T	argv[2];
13497     int		dummy;
13498 
13499     /* shortcut after failure in previous call; compare all items equal */
13500     if (item_compare_func_err)
13501 	return 0;
13502 
13503     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13504      * in the copy without changing the original list items. */
13505     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13506     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13507 
13508     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13509     res = call_func(item_compare_func, STRLEN(item_compare_func),
13510 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13511     clear_tv(&argv[0]);
13512     clear_tv(&argv[1]);
13513 
13514     if (res == FAIL)
13515 	res = ITEM_COMPARE_FAIL;
13516     else
13517 	/* return value has wrong type */
13518 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13519     if (item_compare_func_err)
13520 	res = ITEM_COMPARE_FAIL;
13521     clear_tv(&rettv);
13522     return res;
13523 }
13524 
13525 /*
13526  * "sort({list})" function
13527  */
13528     static void
13529 f_sort(argvars, rettv)
13530     typval_T	*argvars;
13531     typval_T	*rettv;
13532 {
13533     list_T	*l;
13534     listitem_T	*li;
13535     listitem_T	**ptrs;
13536     long	len;
13537     long	i;
13538 
13539     rettv->vval.v_number = 0;
13540     if (argvars[0].v_type != VAR_LIST)
13541 	EMSG2(_(e_listarg), "sort()");
13542     else
13543     {
13544 	l = argvars[0].vval.v_list;
13545 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13546 	    return;
13547 	rettv->vval.v_list = l;
13548 	rettv->v_type = VAR_LIST;
13549 	++l->lv_refcount;
13550 
13551 	len = list_len(l);
13552 	if (len <= 1)
13553 	    return;	/* short list sorts pretty quickly */
13554 
13555 	item_compare_ic = FALSE;
13556 	item_compare_func = NULL;
13557 	if (argvars[1].v_type != VAR_UNKNOWN)
13558 	{
13559 	    if (argvars[1].v_type == VAR_FUNC)
13560 		item_compare_func = argvars[1].vval.v_string;
13561 	    else
13562 	    {
13563 		int	    error = FALSE;
13564 
13565 		i = get_tv_number_chk(&argvars[1], &error);
13566 		if (error)
13567 		    return;		/* type error; errmsg already given */
13568 		if (i == 1)
13569 		    item_compare_ic = TRUE;
13570 		else
13571 		    item_compare_func = get_tv_string(&argvars[1]);
13572 	    }
13573 	}
13574 
13575 	/* Make an array with each entry pointing to an item in the List. */
13576 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13577 	if (ptrs == NULL)
13578 	    return;
13579 	i = 0;
13580 	for (li = l->lv_first; li != NULL; li = li->li_next)
13581 	    ptrs[i++] = li;
13582 
13583 	item_compare_func_err = FALSE;
13584 	/* test the compare function */
13585 	if (item_compare_func != NULL
13586 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13587 							 == ITEM_COMPARE_FAIL)
13588 	    EMSG(_("E702: Sort compare function failed"));
13589 	else
13590 	{
13591 	    /* Sort the array with item pointers. */
13592 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13593 		    item_compare_func == NULL ? item_compare : item_compare2);
13594 
13595 	    if (!item_compare_func_err)
13596 	    {
13597 		/* Clear the List and append the items in the sorted order. */
13598 		l->lv_first = l->lv_last = NULL;
13599 		l->lv_len = 0;
13600 		for (i = 0; i < len; ++i)
13601 		    list_append(l, ptrs[i]);
13602 	    }
13603 	}
13604 
13605 	vim_free(ptrs);
13606     }
13607 }
13608 
13609 /*
13610  * "soundfold({word})" function
13611  */
13612     static void
13613 f_soundfold(argvars, rettv)
13614     typval_T	*argvars;
13615     typval_T	*rettv;
13616 {
13617     char_u	*s;
13618 
13619     rettv->v_type = VAR_STRING;
13620     s = get_tv_string(&argvars[0]);
13621 #ifdef FEAT_SYN_HL
13622     rettv->vval.v_string = eval_soundfold(s);
13623 #else
13624     rettv->vval.v_string = vim_strsave(s);
13625 #endif
13626 }
13627 
13628 /*
13629  * "spellbadword()" function
13630  */
13631 /* ARGSUSED */
13632     static void
13633 f_spellbadword(argvars, rettv)
13634     typval_T	*argvars;
13635     typval_T	*rettv;
13636 {
13637     int		attr;
13638     char_u	*ptr;
13639     int		len;
13640 
13641     rettv->vval.v_string = NULL;
13642     rettv->v_type = VAR_STRING;
13643 
13644 #ifdef FEAT_SYN_HL
13645     /* Find the start of the badly spelled word. */
13646     if (spell_move_to(FORWARD, TRUE, TRUE) == FAIL)
13647 	return;
13648 
13649     /* Get the length of the word and copy it. */
13650     ptr = ml_get_cursor();
13651     len = spell_check(curwin, ptr, &attr, NULL);
13652     rettv->vval.v_string = vim_strnsave(ptr, len);
13653 #endif
13654 }
13655 
13656 /*
13657  * "spellsuggest()" function
13658  */
13659     static void
13660 f_spellsuggest(argvars, rettv)
13661     typval_T	*argvars;
13662     typval_T	*rettv;
13663 {
13664     char_u	*str;
13665     int		maxcount;
13666     garray_T	ga;
13667     list_T	*l;
13668     listitem_T	*li;
13669     int		i;
13670 
13671     l = list_alloc();
13672     if (l == NULL)
13673 	return;
13674     rettv->v_type = VAR_LIST;
13675     rettv->vval.v_list = l;
13676     ++l->lv_refcount;
13677 
13678 #ifdef FEAT_SYN_HL
13679     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13680     {
13681 	str = get_tv_string(&argvars[0]);
13682 	if (argvars[1].v_type != VAR_UNKNOWN)
13683 	{
13684 	    maxcount = get_tv_number(&argvars[1]);
13685 	    if (maxcount <= 0)
13686 		return;
13687 	}
13688 	else
13689 	    maxcount = 25;
13690 
13691 	spell_suggest_list(&ga, str, maxcount);
13692 
13693 	for (i = 0; i < ga.ga_len; ++i)
13694 	{
13695 	    str = ((char_u **)ga.ga_data)[i];
13696 
13697 	    li = listitem_alloc();
13698 	    if (li == NULL)
13699 		vim_free(str);
13700 	    else
13701 	    {
13702 		li->li_tv.v_type = VAR_STRING;
13703 		li->li_tv.v_lock = 0;
13704 		li->li_tv.vval.v_string = str;
13705 		list_append(l, li);
13706 	    }
13707 	}
13708 	ga_clear(&ga);
13709     }
13710 #endif
13711 }
13712 
13713     static void
13714 f_split(argvars, rettv)
13715     typval_T	*argvars;
13716     typval_T	*rettv;
13717 {
13718     char_u	*str;
13719     char_u	*end;
13720     char_u	*pat = NULL;
13721     regmatch_T	regmatch;
13722     char_u	patbuf[NUMBUFLEN];
13723     char_u	*save_cpo;
13724     int		match;
13725     listitem_T	*ni;
13726     list_T	*l;
13727     colnr_T	col = 0;
13728     int		keepempty = FALSE;
13729     int		typeerr = FALSE;
13730 
13731     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13732     save_cpo = p_cpo;
13733     p_cpo = (char_u *)"";
13734 
13735     str = get_tv_string(&argvars[0]);
13736     if (argvars[1].v_type != VAR_UNKNOWN)
13737     {
13738 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13739 	if (pat == NULL)
13740 	    typeerr = TRUE;
13741 	if (argvars[2].v_type != VAR_UNKNOWN)
13742 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13743     }
13744     if (pat == NULL || *pat == NUL)
13745 	pat = (char_u *)"[\\x01- ]\\+";
13746 
13747     l = list_alloc();
13748     if (l == NULL)
13749 	return;
13750     rettv->v_type = VAR_LIST;
13751     rettv->vval.v_list = l;
13752     ++l->lv_refcount;
13753     if (typeerr)
13754 	return;
13755 
13756     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
13757     if (regmatch.regprog != NULL)
13758     {
13759 	regmatch.rm_ic = FALSE;
13760 	while (*str != NUL || keepempty)
13761 	{
13762 	    if (*str == NUL)
13763 		match = FALSE;	/* empty item at the end */
13764 	    else
13765 		match = vim_regexec_nl(&regmatch, str, col);
13766 	    if (match)
13767 		end = regmatch.startp[0];
13768 	    else
13769 		end = str + STRLEN(str);
13770 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
13771 					  && match && end < regmatch.endp[0]))
13772 	    {
13773 		ni = listitem_alloc();
13774 		if (ni == NULL)
13775 		    break;
13776 		ni->li_tv.v_type = VAR_STRING;
13777 		ni->li_tv.v_lock = 0;
13778 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
13779 		list_append(l, ni);
13780 	    }
13781 	    if (!match)
13782 		break;
13783 	    /* Advance to just after the match. */
13784 	    if (regmatch.endp[0] > str)
13785 		col = 0;
13786 	    else
13787 	    {
13788 		/* Don't get stuck at the same match. */
13789 #ifdef FEAT_MBYTE
13790 		col = mb_ptr2len_check(regmatch.endp[0]);
13791 #else
13792 		col = 1;
13793 #endif
13794 	    }
13795 	    str = regmatch.endp[0];
13796 	}
13797 
13798 	vim_free(regmatch.regprog);
13799     }
13800 
13801     p_cpo = save_cpo;
13802 }
13803 
13804 #ifdef HAVE_STRFTIME
13805 /*
13806  * "strftime({format}[, {time}])" function
13807  */
13808     static void
13809 f_strftime(argvars, rettv)
13810     typval_T	*argvars;
13811     typval_T	*rettv;
13812 {
13813     char_u	result_buf[256];
13814     struct tm	*curtime;
13815     time_t	seconds;
13816     char_u	*p;
13817 
13818     rettv->v_type = VAR_STRING;
13819 
13820     p = get_tv_string(&argvars[0]);
13821     if (argvars[1].v_type == VAR_UNKNOWN)
13822 	seconds = time(NULL);
13823     else
13824 	seconds = (time_t)get_tv_number(&argvars[1]);
13825     curtime = localtime(&seconds);
13826     /* MSVC returns NULL for an invalid value of seconds. */
13827     if (curtime == NULL)
13828 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
13829     else
13830     {
13831 # ifdef FEAT_MBYTE
13832 	vimconv_T   conv;
13833 	char_u	    *enc;
13834 
13835 	conv.vc_type = CONV_NONE;
13836 	enc = enc_locale();
13837 	convert_setup(&conv, p_enc, enc);
13838 	if (conv.vc_type != CONV_NONE)
13839 	    p = string_convert(&conv, p, NULL);
13840 # endif
13841 	if (p != NULL)
13842 	    (void)strftime((char *)result_buf, sizeof(result_buf),
13843 							  (char *)p, curtime);
13844 	else
13845 	    result_buf[0] = NUL;
13846 
13847 # ifdef FEAT_MBYTE
13848 	if (conv.vc_type != CONV_NONE)
13849 	    vim_free(p);
13850 	convert_setup(&conv, enc, p_enc);
13851 	if (conv.vc_type != CONV_NONE)
13852 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
13853 	else
13854 # endif
13855 	    rettv->vval.v_string = vim_strsave(result_buf);
13856 
13857 # ifdef FEAT_MBYTE
13858 	/* Release conversion descriptors */
13859 	convert_setup(&conv, NULL, NULL);
13860 	vim_free(enc);
13861 # endif
13862     }
13863 }
13864 #endif
13865 
13866 /*
13867  * "stridx()" function
13868  */
13869     static void
13870 f_stridx(argvars, rettv)
13871     typval_T	*argvars;
13872     typval_T	*rettv;
13873 {
13874     char_u	buf[NUMBUFLEN];
13875     char_u	*needle;
13876     char_u	*haystack;
13877     char_u	*save_haystack;
13878     char_u	*pos;
13879     int		start_idx;
13880 
13881     needle = get_tv_string_chk(&argvars[1]);
13882     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
13883     rettv->vval.v_number = -1;
13884     if (needle == NULL || haystack == NULL)
13885 	return;		/* type error; errmsg already given */
13886 
13887     if (argvars[2].v_type != VAR_UNKNOWN)
13888     {
13889 	int	    error = FALSE;
13890 
13891 	start_idx = get_tv_number_chk(&argvars[2], &error);
13892 	if (error || start_idx >= (int)STRLEN(haystack))
13893 	    return;
13894 	if (start_idx >= 0)
13895 	    haystack += start_idx;
13896     }
13897 
13898     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
13899     if (pos != NULL)
13900 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
13901 }
13902 
13903 /*
13904  * "string()" function
13905  */
13906     static void
13907 f_string(argvars, rettv)
13908     typval_T	*argvars;
13909     typval_T	*rettv;
13910 {
13911     char_u	*tofree;
13912     char_u	numbuf[NUMBUFLEN];
13913 
13914     rettv->v_type = VAR_STRING;
13915     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
13916     if (tofree == NULL)
13917 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
13918 }
13919 
13920 /*
13921  * "strlen()" function
13922  */
13923     static void
13924 f_strlen(argvars, rettv)
13925     typval_T	*argvars;
13926     typval_T	*rettv;
13927 {
13928     rettv->vval.v_number = (varnumber_T)(STRLEN(
13929 					      get_tv_string(&argvars[0])));
13930 }
13931 
13932 /*
13933  * "strpart()" function
13934  */
13935     static void
13936 f_strpart(argvars, rettv)
13937     typval_T	*argvars;
13938     typval_T	*rettv;
13939 {
13940     char_u	*p;
13941     int		n;
13942     int		len;
13943     int		slen;
13944     int		error = FALSE;
13945 
13946     p = get_tv_string(&argvars[0]);
13947     slen = (int)STRLEN(p);
13948 
13949     n = get_tv_number_chk(&argvars[1], &error);
13950     if (error)
13951 	len = 0;
13952     else if (argvars[2].v_type != VAR_UNKNOWN)
13953 	len = get_tv_number(&argvars[2]);
13954     else
13955 	len = slen - n;	    /* default len: all bytes that are available. */
13956 
13957     /*
13958      * Only return the overlap between the specified part and the actual
13959      * string.
13960      */
13961     if (n < 0)
13962     {
13963 	len += n;
13964 	n = 0;
13965     }
13966     else if (n > slen)
13967 	n = slen;
13968     if (len < 0)
13969 	len = 0;
13970     else if (n + len > slen)
13971 	len = slen - n;
13972 
13973     rettv->v_type = VAR_STRING;
13974     rettv->vval.v_string = vim_strnsave(p + n, len);
13975 }
13976 
13977 /*
13978  * "strridx()" function
13979  */
13980     static void
13981 f_strridx(argvars, rettv)
13982     typval_T	*argvars;
13983     typval_T	*rettv;
13984 {
13985     char_u	buf[NUMBUFLEN];
13986     char_u	*needle;
13987     char_u	*haystack;
13988     char_u	*rest;
13989     char_u	*lastmatch = NULL;
13990     int		haystack_len, end_idx;
13991 
13992     needle = get_tv_string_chk(&argvars[1]);
13993     haystack = get_tv_string_buf_chk(&argvars[0], buf);
13994     haystack_len = STRLEN(haystack);
13995 
13996     rettv->vval.v_number = -1;
13997     if (needle == NULL || haystack == NULL)
13998 	return;		/* type error; errmsg already given */
13999     if (argvars[2].v_type != VAR_UNKNOWN)
14000     {
14001 	/* Third argument: upper limit for index */
14002 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14003 	if (end_idx < 0)
14004 	    return;	/* can never find a match */
14005     }
14006     else
14007 	end_idx = haystack_len;
14008 
14009     if (*needle == NUL)
14010     {
14011 	/* Empty string matches past the end. */
14012 	lastmatch = haystack + end_idx;
14013     }
14014     else
14015     {
14016 	for (rest = haystack; *rest != '\0'; ++rest)
14017 	{
14018 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14019 	    if (rest == NULL || rest > haystack + end_idx)
14020 		break;
14021 	    lastmatch = rest;
14022 	}
14023     }
14024 
14025     if (lastmatch == NULL)
14026 	rettv->vval.v_number = -1;
14027     else
14028 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14029 }
14030 
14031 /*
14032  * "strtrans()" function
14033  */
14034     static void
14035 f_strtrans(argvars, rettv)
14036     typval_T	*argvars;
14037     typval_T	*rettv;
14038 {
14039     rettv->v_type = VAR_STRING;
14040     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14041 }
14042 
14043 /*
14044  * "submatch()" function
14045  */
14046     static void
14047 f_submatch(argvars, rettv)
14048     typval_T	*argvars;
14049     typval_T	*rettv;
14050 {
14051     rettv->v_type = VAR_STRING;
14052     rettv->vval.v_string =
14053 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14054 }
14055 
14056 /*
14057  * "substitute()" function
14058  */
14059     static void
14060 f_substitute(argvars, rettv)
14061     typval_T	*argvars;
14062     typval_T	*rettv;
14063 {
14064     char_u	patbuf[NUMBUFLEN];
14065     char_u	subbuf[NUMBUFLEN];
14066     char_u	flagsbuf[NUMBUFLEN];
14067 
14068     char_u	*str = get_tv_string_chk(&argvars[0]);
14069     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14070     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14071     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14072 
14073     rettv->v_type = VAR_STRING;
14074     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14075 	rettv->vval.v_string = NULL;
14076     else
14077 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14078 }
14079 
14080 /*
14081  * "synID(lnum, col, trans)" function
14082  */
14083 /*ARGSUSED*/
14084     static void
14085 f_synID(argvars, rettv)
14086     typval_T	*argvars;
14087     typval_T	*rettv;
14088 {
14089     int		id = 0;
14090 #ifdef FEAT_SYN_HL
14091     long	lnum;
14092     long	col;
14093     int		trans;
14094     int		transerr = FALSE;
14095 
14096     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14097     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14098     trans = get_tv_number_chk(&argvars[2], &transerr);
14099 
14100     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14101 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14102 	id = syn_get_id(lnum, (colnr_T)col, trans, NULL);
14103 #endif
14104 
14105     rettv->vval.v_number = id;
14106 }
14107 
14108 /*
14109  * "synIDattr(id, what [, mode])" function
14110  */
14111 /*ARGSUSED*/
14112     static void
14113 f_synIDattr(argvars, rettv)
14114     typval_T	*argvars;
14115     typval_T	*rettv;
14116 {
14117     char_u	*p = NULL;
14118 #ifdef FEAT_SYN_HL
14119     int		id;
14120     char_u	*what;
14121     char_u	*mode;
14122     char_u	modebuf[NUMBUFLEN];
14123     int		modec;
14124 
14125     id = get_tv_number(&argvars[0]);
14126     what = get_tv_string(&argvars[1]);
14127     if (argvars[2].v_type != VAR_UNKNOWN)
14128     {
14129 	mode = get_tv_string_buf(&argvars[2], modebuf);
14130 	modec = TOLOWER_ASC(mode[0]);
14131 	if (modec != 't' && modec != 'c'
14132 #ifdef FEAT_GUI
14133 		&& modec != 'g'
14134 #endif
14135 		)
14136 	    modec = 0;	/* replace invalid with current */
14137     }
14138     else
14139     {
14140 #ifdef FEAT_GUI
14141 	if (gui.in_use)
14142 	    modec = 'g';
14143 	else
14144 #endif
14145 	    if (t_colors > 1)
14146 	    modec = 'c';
14147 	else
14148 	    modec = 't';
14149     }
14150 
14151 
14152     switch (TOLOWER_ASC(what[0]))
14153     {
14154 	case 'b':
14155 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14156 		    p = highlight_color(id, what, modec);
14157 		else					/* bold */
14158 		    p = highlight_has_attr(id, HL_BOLD, modec);
14159 		break;
14160 
14161 	case 'f':					/* fg[#] */
14162 		p = highlight_color(id, what, modec);
14163 		break;
14164 
14165 	case 'i':
14166 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14167 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14168 		else					/* italic */
14169 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14170 		break;
14171 
14172 	case 'n':					/* name */
14173 		p = get_highlight_name(NULL, id - 1);
14174 		break;
14175 
14176 	case 'r':					/* reverse */
14177 		p = highlight_has_attr(id, HL_INVERSE, modec);
14178 		break;
14179 
14180 	case 's':					/* standout */
14181 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14182 		break;
14183 
14184 	case 'u':
14185 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14186 							/* underline */
14187 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14188 		else
14189 							/* undercurl */
14190 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14191 		break;
14192     }
14193 
14194     if (p != NULL)
14195 	p = vim_strsave(p);
14196 #endif
14197     rettv->v_type = VAR_STRING;
14198     rettv->vval.v_string = p;
14199 }
14200 
14201 /*
14202  * "synIDtrans(id)" function
14203  */
14204 /*ARGSUSED*/
14205     static void
14206 f_synIDtrans(argvars, rettv)
14207     typval_T	*argvars;
14208     typval_T	*rettv;
14209 {
14210     int		id;
14211 
14212 #ifdef FEAT_SYN_HL
14213     id = get_tv_number(&argvars[0]);
14214 
14215     if (id > 0)
14216 	id = syn_get_final_id(id);
14217     else
14218 #endif
14219 	id = 0;
14220 
14221     rettv->vval.v_number = id;
14222 }
14223 
14224 /*
14225  * "system()" function
14226  */
14227     static void
14228 f_system(argvars, rettv)
14229     typval_T	*argvars;
14230     typval_T	*rettv;
14231 {
14232     char_u	*res = NULL;
14233     char_u	*p;
14234     char_u	*infile = NULL;
14235     char_u	buf[NUMBUFLEN];
14236     int		err = FALSE;
14237     FILE	*fd;
14238 
14239     if (argvars[1].v_type != VAR_UNKNOWN)
14240     {
14241 	/*
14242 	 * Write the string to a temp file, to be used for input of the shell
14243 	 * command.
14244 	 */
14245 	if ((infile = vim_tempname('i')) == NULL)
14246 	{
14247 	    EMSG(_(e_notmp));
14248 	    return;
14249 	}
14250 
14251 	fd = mch_fopen((char *)infile, WRITEBIN);
14252 	if (fd == NULL)
14253 	{
14254 	    EMSG2(_(e_notopen), infile);
14255 	    goto done;
14256 	}
14257 	p = get_tv_string_buf_chk(&argvars[1], buf);
14258 	if (p == NULL)
14259 	    goto done;		/* type error; errmsg already given */
14260 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14261 	    err = TRUE;
14262 	if (fclose(fd) != 0)
14263 	    err = TRUE;
14264 	if (err)
14265 	{
14266 	    EMSG(_("E677: Error writing temp file"));
14267 	    goto done;
14268 	}
14269     }
14270 
14271     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14272 
14273 #ifdef USE_CR
14274     /* translate <CR> into <NL> */
14275     if (res != NULL)
14276     {
14277 	char_u	*s;
14278 
14279 	for (s = res; *s; ++s)
14280 	{
14281 	    if (*s == CAR)
14282 		*s = NL;
14283 	}
14284     }
14285 #else
14286 # ifdef USE_CRNL
14287     /* translate <CR><NL> into <NL> */
14288     if (res != NULL)
14289     {
14290 	char_u	*s, *d;
14291 
14292 	d = res;
14293 	for (s = res; *s; ++s)
14294 	{
14295 	    if (s[0] == CAR && s[1] == NL)
14296 		++s;
14297 	    *d++ = *s;
14298 	}
14299 	*d = NUL;
14300     }
14301 # endif
14302 #endif
14303 
14304 done:
14305     if (infile != NULL)
14306     {
14307 	mch_remove(infile);
14308 	vim_free(infile);
14309     }
14310     rettv->v_type = VAR_STRING;
14311     rettv->vval.v_string = res;
14312 }
14313 
14314 /*
14315  * "taglist()" function
14316  */
14317     static void
14318 f_taglist(argvars, rettv)
14319     typval_T  *argvars;
14320     typval_T  *rettv;
14321 {
14322     char_u  *tag_pattern;
14323     list_T  *l;
14324 
14325     tag_pattern = get_tv_string(&argvars[0]);
14326 
14327     rettv->vval.v_number = FALSE;
14328     if (*tag_pattern == NUL)
14329 	return;
14330 
14331     l = list_alloc();
14332     if (l != NULL)
14333     {
14334 	if (get_tags(l, tag_pattern) != FAIL)
14335 	{
14336 	    rettv->vval.v_list = l;
14337 	    rettv->v_type = VAR_LIST;
14338 	    ++l->lv_refcount;
14339 	}
14340 	else
14341 	    list_free(l);
14342     }
14343 }
14344 
14345 /*
14346  * "tempname()" function
14347  */
14348 /*ARGSUSED*/
14349     static void
14350 f_tempname(argvars, rettv)
14351     typval_T	*argvars;
14352     typval_T	*rettv;
14353 {
14354     static int	x = 'A';
14355 
14356     rettv->v_type = VAR_STRING;
14357     rettv->vval.v_string = vim_tempname(x);
14358 
14359     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14360      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14361     do
14362     {
14363 	if (x == 'Z')
14364 	    x = '0';
14365 	else if (x == '9')
14366 	    x = 'A';
14367 	else
14368 	{
14369 #ifdef EBCDIC
14370 	    if (x == 'I')
14371 		x = 'J';
14372 	    else if (x == 'R')
14373 		x = 'S';
14374 	    else
14375 #endif
14376 		++x;
14377 	}
14378     } while (x == 'I' || x == 'O');
14379 }
14380 
14381 /*
14382  * "tolower(string)" function
14383  */
14384     static void
14385 f_tolower(argvars, rettv)
14386     typval_T	*argvars;
14387     typval_T	*rettv;
14388 {
14389     char_u	*p;
14390 
14391     p = vim_strsave(get_tv_string(&argvars[0]));
14392     rettv->v_type = VAR_STRING;
14393     rettv->vval.v_string = p;
14394 
14395     if (p != NULL)
14396 	while (*p != NUL)
14397 	{
14398 #ifdef FEAT_MBYTE
14399 	    int		l;
14400 
14401 	    if (enc_utf8)
14402 	    {
14403 		int c, lc;
14404 
14405 		c = utf_ptr2char(p);
14406 		lc = utf_tolower(c);
14407 		l = utf_ptr2len_check(p);
14408 		/* TODO: reallocate string when byte count changes. */
14409 		if (utf_char2len(lc) == l)
14410 		    utf_char2bytes(lc, p);
14411 		p += l;
14412 	    }
14413 	    else if (has_mbyte && (l = (*mb_ptr2len_check)(p)) > 1)
14414 		p += l;		/* skip multi-byte character */
14415 	    else
14416 #endif
14417 	    {
14418 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14419 		++p;
14420 	    }
14421 	}
14422 }
14423 
14424 /*
14425  * "toupper(string)" function
14426  */
14427     static void
14428 f_toupper(argvars, rettv)
14429     typval_T	*argvars;
14430     typval_T	*rettv;
14431 {
14432     rettv->v_type = VAR_STRING;
14433     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14434 }
14435 
14436 /*
14437  * "tr(string, fromstr, tostr)" function
14438  */
14439     static void
14440 f_tr(argvars, rettv)
14441     typval_T	*argvars;
14442     typval_T	*rettv;
14443 {
14444     char_u	*instr;
14445     char_u	*fromstr;
14446     char_u	*tostr;
14447     char_u	*p;
14448 #ifdef FEAT_MBYTE
14449     int		inlen;
14450     int		fromlen;
14451     int		tolen;
14452     int		idx;
14453     char_u	*cpstr;
14454     int		cplen;
14455     int		first = TRUE;
14456 #endif
14457     char_u	buf[NUMBUFLEN];
14458     char_u	buf2[NUMBUFLEN];
14459     garray_T	ga;
14460 
14461     instr = get_tv_string(&argvars[0]);
14462     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14463     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14464 
14465     /* Default return value: empty string. */
14466     rettv->v_type = VAR_STRING;
14467     rettv->vval.v_string = NULL;
14468     if (fromstr == NULL || tostr == NULL)
14469 	    return;		/* type error; errmsg already given */
14470     ga_init2(&ga, (int)sizeof(char), 80);
14471 
14472 #ifdef FEAT_MBYTE
14473     if (!has_mbyte)
14474 #endif
14475 	/* not multi-byte: fromstr and tostr must be the same length */
14476 	if (STRLEN(fromstr) != STRLEN(tostr))
14477 	{
14478 #ifdef FEAT_MBYTE
14479 error:
14480 #endif
14481 	    EMSG2(_(e_invarg2), fromstr);
14482 	    ga_clear(&ga);
14483 	    return;
14484 	}
14485 
14486     /* fromstr and tostr have to contain the same number of chars */
14487     while (*instr != NUL)
14488     {
14489 #ifdef FEAT_MBYTE
14490 	if (has_mbyte)
14491 	{
14492 	    inlen = mb_ptr2len_check(instr);
14493 	    cpstr = instr;
14494 	    cplen = inlen;
14495 	    idx = 0;
14496 	    for (p = fromstr; *p != NUL; p += fromlen)
14497 	    {
14498 		fromlen = mb_ptr2len_check(p);
14499 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14500 		{
14501 		    for (p = tostr; *p != NUL; p += tolen)
14502 		    {
14503 			tolen = mb_ptr2len_check(p);
14504 			if (idx-- == 0)
14505 			{
14506 			    cplen = tolen;
14507 			    cpstr = p;
14508 			    break;
14509 			}
14510 		    }
14511 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14512 			goto error;
14513 		    break;
14514 		}
14515 		++idx;
14516 	    }
14517 
14518 	    if (first && cpstr == instr)
14519 	    {
14520 		/* Check that fromstr and tostr have the same number of
14521 		 * (multi-byte) characters.  Done only once when a character
14522 		 * of instr doesn't appear in fromstr. */
14523 		first = FALSE;
14524 		for (p = tostr; *p != NUL; p += tolen)
14525 		{
14526 		    tolen = mb_ptr2len_check(p);
14527 		    --idx;
14528 		}
14529 		if (idx != 0)
14530 		    goto error;
14531 	    }
14532 
14533 	    ga_grow(&ga, cplen);
14534 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14535 	    ga.ga_len += cplen;
14536 
14537 	    instr += inlen;
14538 	}
14539 	else
14540 #endif
14541 	{
14542 	    /* When not using multi-byte chars we can do it faster. */
14543 	    p = vim_strchr(fromstr, *instr);
14544 	    if (p != NULL)
14545 		ga_append(&ga, tostr[p - fromstr]);
14546 	    else
14547 		ga_append(&ga, *instr);
14548 	    ++instr;
14549 	}
14550     }
14551 
14552     rettv->vval.v_string = ga.ga_data;
14553 }
14554 
14555 /*
14556  * "type(expr)" function
14557  */
14558     static void
14559 f_type(argvars, rettv)
14560     typval_T	*argvars;
14561     typval_T	*rettv;
14562 {
14563     int n;
14564 
14565     switch (argvars[0].v_type)
14566     {
14567 	case VAR_NUMBER: n = 0; break;
14568 	case VAR_STRING: n = 1; break;
14569 	case VAR_FUNC:   n = 2; break;
14570 	case VAR_LIST:   n = 3; break;
14571 	case VAR_DICT:   n = 4; break;
14572 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14573     }
14574     rettv->vval.v_number = n;
14575 }
14576 
14577 /*
14578  * "values(dict)" function
14579  */
14580     static void
14581 f_values(argvars, rettv)
14582     typval_T	*argvars;
14583     typval_T	*rettv;
14584 {
14585     dict_list(argvars, rettv, 1);
14586 }
14587 
14588 /*
14589  * "virtcol(string)" function
14590  */
14591     static void
14592 f_virtcol(argvars, rettv)
14593     typval_T	*argvars;
14594     typval_T	*rettv;
14595 {
14596     colnr_T	vcol = 0;
14597     pos_T	*fp;
14598 
14599     fp = var2fpos(&argvars[0], FALSE);
14600     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14601     {
14602 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14603 	++vcol;
14604     }
14605 
14606     rettv->vval.v_number = vcol;
14607 }
14608 
14609 /*
14610  * "visualmode()" function
14611  */
14612 /*ARGSUSED*/
14613     static void
14614 f_visualmode(argvars, rettv)
14615     typval_T	*argvars;
14616     typval_T	*rettv;
14617 {
14618 #ifdef FEAT_VISUAL
14619     char_u	str[2];
14620 
14621     rettv->v_type = VAR_STRING;
14622     str[0] = curbuf->b_visual_mode_eval;
14623     str[1] = NUL;
14624     rettv->vval.v_string = vim_strsave(str);
14625 
14626     /* A non-zero number or non-empty string argument: reset mode. */
14627     if ((argvars[0].v_type == VAR_NUMBER
14628 		&& argvars[0].vval.v_number != 0)
14629 	    || (argvars[0].v_type == VAR_STRING
14630 		&& *get_tv_string(&argvars[0]) != NUL))
14631 	curbuf->b_visual_mode_eval = NUL;
14632 #else
14633     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14634 #endif
14635 }
14636 
14637 /*
14638  * "winbufnr(nr)" function
14639  */
14640     static void
14641 f_winbufnr(argvars, rettv)
14642     typval_T	*argvars;
14643     typval_T	*rettv;
14644 {
14645     win_T	*wp;
14646 
14647     wp = find_win_by_nr(&argvars[0]);
14648     if (wp == NULL)
14649 	rettv->vval.v_number = -1;
14650     else
14651 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14652 }
14653 
14654 /*
14655  * "wincol()" function
14656  */
14657 /*ARGSUSED*/
14658     static void
14659 f_wincol(argvars, rettv)
14660     typval_T	*argvars;
14661     typval_T	*rettv;
14662 {
14663     validate_cursor();
14664     rettv->vval.v_number = curwin->w_wcol + 1;
14665 }
14666 
14667 /*
14668  * "winheight(nr)" function
14669  */
14670     static void
14671 f_winheight(argvars, rettv)
14672     typval_T	*argvars;
14673     typval_T	*rettv;
14674 {
14675     win_T	*wp;
14676 
14677     wp = find_win_by_nr(&argvars[0]);
14678     if (wp == NULL)
14679 	rettv->vval.v_number = -1;
14680     else
14681 	rettv->vval.v_number = wp->w_height;
14682 }
14683 
14684 /*
14685  * "winline()" function
14686  */
14687 /*ARGSUSED*/
14688     static void
14689 f_winline(argvars, rettv)
14690     typval_T	*argvars;
14691     typval_T	*rettv;
14692 {
14693     validate_cursor();
14694     rettv->vval.v_number = curwin->w_wrow + 1;
14695 }
14696 
14697 /*
14698  * "winnr()" function
14699  */
14700 /* ARGSUSED */
14701     static void
14702 f_winnr(argvars, rettv)
14703     typval_T	*argvars;
14704     typval_T	*rettv;
14705 {
14706     int		nr = 1;
14707 #ifdef FEAT_WINDOWS
14708     win_T	*wp;
14709     win_T	*twin = curwin;
14710     char_u	*arg;
14711 
14712     if (argvars[0].v_type != VAR_UNKNOWN)
14713     {
14714 	arg = get_tv_string_chk(&argvars[0]);
14715 	if (arg == NULL)
14716 	    nr = 0;		/* type error; errmsg already given */
14717 	else if (STRCMP(arg, "$") == 0)
14718 	    twin = lastwin;
14719 	else if (STRCMP(arg, "#") == 0)
14720 	{
14721 	    twin = prevwin;
14722 	    if (prevwin == NULL)
14723 		nr = 0;
14724 	}
14725 	else
14726 	{
14727 	    EMSG2(_(e_invexpr2), arg);
14728 	    nr = 0;
14729 	}
14730     }
14731 
14732     if (nr > 0)
14733 	for (wp = firstwin; wp != twin; wp = wp->w_next)
14734 	    ++nr;
14735 #endif
14736     rettv->vval.v_number = nr;
14737 }
14738 
14739 /*
14740  * "winrestcmd()" function
14741  */
14742 /* ARGSUSED */
14743     static void
14744 f_winrestcmd(argvars, rettv)
14745     typval_T	*argvars;
14746     typval_T	*rettv;
14747 {
14748 #ifdef FEAT_WINDOWS
14749     win_T	*wp;
14750     int		winnr = 1;
14751     garray_T	ga;
14752     char_u	buf[50];
14753 
14754     ga_init2(&ga, (int)sizeof(char), 70);
14755     for (wp = firstwin; wp != NULL; wp = wp->w_next)
14756     {
14757 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
14758 	ga_concat(&ga, buf);
14759 # ifdef FEAT_VERTSPLIT
14760 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
14761 	ga_concat(&ga, buf);
14762 # endif
14763 	++winnr;
14764     }
14765     ga_append(&ga, NUL);
14766 
14767     rettv->vval.v_string = ga.ga_data;
14768 #else
14769     rettv->vval.v_string = NULL;
14770 #endif
14771     rettv->v_type = VAR_STRING;
14772 }
14773 
14774 /*
14775  * "winwidth(nr)" function
14776  */
14777     static void
14778 f_winwidth(argvars, rettv)
14779     typval_T	*argvars;
14780     typval_T	*rettv;
14781 {
14782     win_T	*wp;
14783 
14784     wp = find_win_by_nr(&argvars[0]);
14785     if (wp == NULL)
14786 	rettv->vval.v_number = -1;
14787     else
14788 #ifdef FEAT_VERTSPLIT
14789 	rettv->vval.v_number = wp->w_width;
14790 #else
14791 	rettv->vval.v_number = Columns;
14792 #endif
14793 }
14794 
14795 /*
14796  * "writefile()" function
14797  */
14798     static void
14799 f_writefile(argvars, rettv)
14800     typval_T	*argvars;
14801     typval_T	*rettv;
14802 {
14803     int		binary = FALSE;
14804     char_u	*fname;
14805     FILE	*fd;
14806     listitem_T	*li;
14807     char_u	*s;
14808     int		ret = 0;
14809     int		c;
14810 
14811     if (argvars[0].v_type != VAR_LIST)
14812     {
14813 	EMSG2(_(e_listarg), "writefile()");
14814 	return;
14815     }
14816     if (argvars[0].vval.v_list == NULL)
14817 	return;
14818 
14819     if (argvars[2].v_type != VAR_UNKNOWN
14820 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
14821 	binary = TRUE;
14822 
14823     /* Always open the file in binary mode, library functions have a mind of
14824      * their own about CR-LF conversion. */
14825     fname = get_tv_string(&argvars[1]);
14826     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
14827     {
14828 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
14829 	ret = -1;
14830     }
14831     else
14832     {
14833 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
14834 							     li = li->li_next)
14835 	{
14836 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
14837 	    {
14838 		if (*s == '\n')
14839 		    c = putc(NUL, fd);
14840 		else
14841 		    c = putc(*s, fd);
14842 		if (c == EOF)
14843 		{
14844 		    ret = -1;
14845 		    break;
14846 		}
14847 	    }
14848 	    if (!binary || li->li_next != NULL)
14849 		if (putc('\n', fd) == EOF)
14850 		{
14851 		    ret = -1;
14852 		    break;
14853 		}
14854 	    if (ret < 0)
14855 	    {
14856 		EMSG(_(e_write));
14857 		break;
14858 	    }
14859 	}
14860 	fclose(fd);
14861     }
14862 
14863     rettv->vval.v_number = ret;
14864 }
14865 
14866 /*
14867  * Translate a String variable into a position.
14868  */
14869     static pos_T *
14870 var2fpos(varp, lnum)
14871     typval_T	*varp;
14872     int		lnum;		/* TRUE when $ is last line */
14873 {
14874     char_u	*name;
14875     static pos_T	pos;
14876     pos_T	*pp;
14877 
14878     name = get_tv_string_chk(varp);
14879     if (name == NULL)
14880 	return NULL;
14881     if (name[0] == '.')		/* cursor */
14882 	return &curwin->w_cursor;
14883     if (name[0] == '\'')	/* mark */
14884     {
14885 	pp = getmark(name[1], FALSE);
14886 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
14887 	    return NULL;
14888 	return pp;
14889     }
14890     if (name[0] == '$')		/* last column or line */
14891     {
14892 	if (lnum)
14893 	{
14894 	    pos.lnum = curbuf->b_ml.ml_line_count;
14895 	    pos.col = 0;
14896 	}
14897 	else
14898 	{
14899 	    pos.lnum = curwin->w_cursor.lnum;
14900 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
14901 	}
14902 	return &pos;
14903     }
14904     return NULL;
14905 }
14906 
14907 /*
14908  * Get the length of an environment variable name.
14909  * Advance "arg" to the first character after the name.
14910  * Return 0 for error.
14911  */
14912     static int
14913 get_env_len(arg)
14914     char_u	**arg;
14915 {
14916     char_u	*p;
14917     int		len;
14918 
14919     for (p = *arg; vim_isIDc(*p); ++p)
14920 	;
14921     if (p == *arg)	    /* no name found */
14922 	return 0;
14923 
14924     len = (int)(p - *arg);
14925     *arg = p;
14926     return len;
14927 }
14928 
14929 /*
14930  * Get the length of the name of a function or internal variable.
14931  * "arg" is advanced to the first non-white character after the name.
14932  * Return 0 if something is wrong.
14933  */
14934     static int
14935 get_id_len(arg)
14936     char_u	**arg;
14937 {
14938     char_u	*p;
14939     int		len;
14940 
14941     /* Find the end of the name. */
14942     for (p = *arg; eval_isnamec(*p); ++p)
14943 	;
14944     if (p == *arg)	    /* no name found */
14945 	return 0;
14946 
14947     len = (int)(p - *arg);
14948     *arg = skipwhite(p);
14949 
14950     return len;
14951 }
14952 
14953 /*
14954  * Get the length of the name of a variable or function.
14955  * Only the name is recognized, does not handle ".key" or "[idx]".
14956  * "arg" is advanced to the first non-white character after the name.
14957  * Return -1 if curly braces expansion failed.
14958  * Return 0 if something else is wrong.
14959  * If the name contains 'magic' {}'s, expand them and return the
14960  * expanded name in an allocated string via 'alias' - caller must free.
14961  */
14962     static int
14963 get_name_len(arg, alias, evaluate, verbose)
14964     char_u	**arg;
14965     char_u	**alias;
14966     int		evaluate;
14967     int		verbose;
14968 {
14969     int		len;
14970     char_u	*p;
14971     char_u	*expr_start;
14972     char_u	*expr_end;
14973 
14974     *alias = NULL;  /* default to no alias */
14975 
14976     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
14977 						  && (*arg)[2] == (int)KE_SNR)
14978     {
14979 	/* hard coded <SNR>, already translated */
14980 	*arg += 3;
14981 	return get_id_len(arg) + 3;
14982     }
14983     len = eval_fname_script(*arg);
14984     if (len > 0)
14985     {
14986 	/* literal "<SID>", "s:" or "<SNR>" */
14987 	*arg += len;
14988     }
14989 
14990     /*
14991      * Find the end of the name; check for {} construction.
14992      */
14993     p = find_name_end(*arg, &expr_start, &expr_end,
14994 					       len > 0 ? 0 : FNE_CHECK_START);
14995     if (expr_start != NULL)
14996     {
14997 	char_u	*temp_string;
14998 
14999 	if (!evaluate)
15000 	{
15001 	    len += (int)(p - *arg);
15002 	    *arg = skipwhite(p);
15003 	    return len;
15004 	}
15005 
15006 	/*
15007 	 * Include any <SID> etc in the expanded string:
15008 	 * Thus the -len here.
15009 	 */
15010 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15011 	if (temp_string == NULL)
15012 	    return -1;
15013 	*alias = temp_string;
15014 	*arg = skipwhite(p);
15015 	return (int)STRLEN(temp_string);
15016     }
15017 
15018     len += get_id_len(arg);
15019     if (len == 0 && verbose)
15020 	EMSG2(_(e_invexpr2), *arg);
15021 
15022     return len;
15023 }
15024 
15025 /*
15026  * Find the end of a variable or function name, taking care of magic braces.
15027  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15028  * start and end of the first magic braces item.
15029  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15030  * Return a pointer to just after the name.  Equal to "arg" if there is no
15031  * valid name.
15032  */
15033     static char_u *
15034 find_name_end(arg, expr_start, expr_end, flags)
15035     char_u	*arg;
15036     char_u	**expr_start;
15037     char_u	**expr_end;
15038     int		flags;
15039 {
15040     int		mb_nest = 0;
15041     int		br_nest = 0;
15042     char_u	*p;
15043 
15044     if (expr_start != NULL)
15045     {
15046 	*expr_start = NULL;
15047 	*expr_end = NULL;
15048     }
15049 
15050     /* Quick check for valid starting character. */
15051     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15052 	return arg;
15053 
15054     for (p = arg; *p != NUL
15055 		    && (eval_isnamec(*p)
15056 			|| *p == '{'
15057 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15058 			|| mb_nest != 0
15059 			|| br_nest != 0); ++p)
15060     {
15061 	if (mb_nest == 0)
15062 	{
15063 	    if (*p == '[')
15064 		++br_nest;
15065 	    else if (*p == ']')
15066 		--br_nest;
15067 	}
15068 	if (br_nest == 0)
15069 	{
15070 	    if (*p == '{')
15071 	    {
15072 		mb_nest++;
15073 		if (expr_start != NULL && *expr_start == NULL)
15074 		    *expr_start = p;
15075 	    }
15076 	    else if (*p == '}')
15077 	    {
15078 		mb_nest--;
15079 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15080 		    *expr_end = p;
15081 	    }
15082 	}
15083     }
15084 
15085     return p;
15086 }
15087 
15088 /*
15089  * Expands out the 'magic' {}'s in a variable/function name.
15090  * Note that this can call itself recursively, to deal with
15091  * constructs like foo{bar}{baz}{bam}
15092  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15093  *			"in_start"      ^
15094  *			"expr_start"	   ^
15095  *			"expr_end"		 ^
15096  *			"in_end"			    ^
15097  *
15098  * Returns a new allocated string, which the caller must free.
15099  * Returns NULL for failure.
15100  */
15101     static char_u *
15102 make_expanded_name(in_start, expr_start, expr_end, in_end)
15103     char_u	*in_start;
15104     char_u	*expr_start;
15105     char_u	*expr_end;
15106     char_u	*in_end;
15107 {
15108     char_u	c1;
15109     char_u	*retval = NULL;
15110     char_u	*temp_result;
15111     char_u	*nextcmd = NULL;
15112 
15113     if (expr_end == NULL || in_end == NULL)
15114 	return NULL;
15115     *expr_start	= NUL;
15116     *expr_end = NUL;
15117     c1 = *in_end;
15118     *in_end = NUL;
15119 
15120     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15121     if (temp_result != NULL && nextcmd == NULL)
15122     {
15123 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15124 						   + (in_end - expr_end) + 1));
15125 	if (retval != NULL)
15126 	{
15127 	    STRCPY(retval, in_start);
15128 	    STRCAT(retval, temp_result);
15129 	    STRCAT(retval, expr_end + 1);
15130 	}
15131     }
15132     vim_free(temp_result);
15133 
15134     *in_end = c1;		/* put char back for error messages */
15135     *expr_start = '{';
15136     *expr_end = '}';
15137 
15138     if (retval != NULL)
15139     {
15140 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15141 	if (expr_start != NULL)
15142 	{
15143 	    /* Further expansion! */
15144 	    temp_result = make_expanded_name(retval, expr_start,
15145 						       expr_end, temp_result);
15146 	    vim_free(retval);
15147 	    retval = temp_result;
15148 	}
15149     }
15150 
15151     return retval;
15152 }
15153 
15154 /*
15155  * Return TRUE if character "c" can be used in a variable or function name.
15156  * Does not include '{' or '}' for magic braces.
15157  */
15158     static int
15159 eval_isnamec(c)
15160     int	    c;
15161 {
15162     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15163 }
15164 
15165 /*
15166  * Return TRUE if character "c" can be used as the first character in a
15167  * variable or function name (excluding '{' and '}').
15168  */
15169     static int
15170 eval_isnamec1(c)
15171     int	    c;
15172 {
15173     return (ASCII_ISALPHA(c) || c == '_');
15174 }
15175 
15176 /*
15177  * Set number v: variable to "val".
15178  */
15179     void
15180 set_vim_var_nr(idx, val)
15181     int		idx;
15182     long	val;
15183 {
15184     vimvars[idx].vv_nr = val;
15185 }
15186 
15187 /*
15188  * Get number v: variable value.
15189  */
15190     long
15191 get_vim_var_nr(idx)
15192     int		idx;
15193 {
15194     return vimvars[idx].vv_nr;
15195 }
15196 
15197 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15198 /*
15199  * Get string v: variable value.  Uses a static buffer, can only be used once.
15200  */
15201     char_u *
15202 get_vim_var_str(idx)
15203     int		idx;
15204 {
15205     return get_tv_string(&vimvars[idx].vv_tv);
15206 }
15207 #endif
15208 
15209 /*
15210  * Set v:count, v:count1 and v:prevcount.
15211  */
15212     void
15213 set_vcount(count, count1)
15214     long	count;
15215     long	count1;
15216 {
15217     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15218     vimvars[VV_COUNT].vv_nr = count;
15219     vimvars[VV_COUNT1].vv_nr = count1;
15220 }
15221 
15222 /*
15223  * Set string v: variable to a copy of "val".
15224  */
15225     void
15226 set_vim_var_string(idx, val, len)
15227     int		idx;
15228     char_u	*val;
15229     int		len;	    /* length of "val" to use or -1 (whole string) */
15230 {
15231     /* Need to do this (at least) once, since we can't initialize a union.
15232      * Will always be invoked when "v:progname" is set. */
15233     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15234 
15235     vim_free(vimvars[idx].vv_str);
15236     if (val == NULL)
15237 	vimvars[idx].vv_str = NULL;
15238     else if (len == -1)
15239 	vimvars[idx].vv_str = vim_strsave(val);
15240     else
15241 	vimvars[idx].vv_str = vim_strnsave(val, len);
15242 }
15243 
15244 /*
15245  * Set v:register if needed.
15246  */
15247     void
15248 set_reg_var(c)
15249     int		c;
15250 {
15251     char_u	regname;
15252 
15253     if (c == 0 || c == ' ')
15254 	regname = '"';
15255     else
15256 	regname = c;
15257     /* Avoid free/alloc when the value is already right. */
15258     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15259 	set_vim_var_string(VV_REG, &regname, 1);
15260 }
15261 
15262 /*
15263  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15264  * Otherwise, restore the value to "oldval" and return NULL.
15265  * Must always be called in pairs to save and restore v:exception!  Does not
15266  * take care of memory allocations.
15267  */
15268     char_u *
15269 v_exception(oldval)
15270     char_u	*oldval;
15271 {
15272     if (oldval == NULL)
15273 	return vimvars[VV_EXCEPTION].vv_str;
15274 
15275     vimvars[VV_EXCEPTION].vv_str = oldval;
15276     return NULL;
15277 }
15278 
15279 /*
15280  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15281  * Otherwise, restore the value to "oldval" and return NULL.
15282  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15283  * take care of memory allocations.
15284  */
15285     char_u *
15286 v_throwpoint(oldval)
15287     char_u	*oldval;
15288 {
15289     if (oldval == NULL)
15290 	return vimvars[VV_THROWPOINT].vv_str;
15291 
15292     vimvars[VV_THROWPOINT].vv_str = oldval;
15293     return NULL;
15294 }
15295 
15296 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15297 /*
15298  * Set v:cmdarg.
15299  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15300  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15301  * Must always be called in pairs!
15302  */
15303     char_u *
15304 set_cmdarg(eap, oldarg)
15305     exarg_T	*eap;
15306     char_u	*oldarg;
15307 {
15308     char_u	*oldval;
15309     char_u	*newval;
15310     unsigned	len;
15311 
15312     oldval = vimvars[VV_CMDARG].vv_str;
15313     if (eap == NULL)
15314     {
15315 	vim_free(oldval);
15316 	vimvars[VV_CMDARG].vv_str = oldarg;
15317 	return NULL;
15318     }
15319 
15320     if (eap->force_bin == FORCE_BIN)
15321 	len = 6;
15322     else if (eap->force_bin == FORCE_NOBIN)
15323 	len = 8;
15324     else
15325 	len = 0;
15326     if (eap->force_ff != 0)
15327 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15328 # ifdef FEAT_MBYTE
15329     if (eap->force_enc != 0)
15330 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15331 # endif
15332 
15333     newval = alloc(len + 1);
15334     if (newval == NULL)
15335 	return NULL;
15336 
15337     if (eap->force_bin == FORCE_BIN)
15338 	sprintf((char *)newval, " ++bin");
15339     else if (eap->force_bin == FORCE_NOBIN)
15340 	sprintf((char *)newval, " ++nobin");
15341     else
15342 	*newval = NUL;
15343     if (eap->force_ff != 0)
15344 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15345 						eap->cmd + eap->force_ff);
15346 # ifdef FEAT_MBYTE
15347     if (eap->force_enc != 0)
15348 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15349 					       eap->cmd + eap->force_enc);
15350 # endif
15351     vimvars[VV_CMDARG].vv_str = newval;
15352     return oldval;
15353 }
15354 #endif
15355 
15356 /*
15357  * Get the value of internal variable "name".
15358  * Return OK or FAIL.
15359  */
15360     static int
15361 get_var_tv(name, len, rettv, verbose)
15362     char_u	*name;
15363     int		len;		/* length of "name" */
15364     typval_T	*rettv;		/* NULL when only checking existence */
15365     int		verbose;	/* may give error message */
15366 {
15367     int		ret = OK;
15368     typval_T	*tv = NULL;
15369     typval_T	atv;
15370     dictitem_T	*v;
15371     int		cc;
15372 
15373     /* truncate the name, so that we can use strcmp() */
15374     cc = name[len];
15375     name[len] = NUL;
15376 
15377     /*
15378      * Check for "b:changedtick".
15379      */
15380     if (STRCMP(name, "b:changedtick") == 0)
15381     {
15382 	atv.v_type = VAR_NUMBER;
15383 	atv.vval.v_number = curbuf->b_changedtick;
15384 	tv = &atv;
15385     }
15386 
15387     /*
15388      * Check for user-defined variables.
15389      */
15390     else
15391     {
15392 	v = find_var(name, NULL);
15393 	if (v != NULL)
15394 	    tv = &v->di_tv;
15395     }
15396 
15397     if (tv == NULL)
15398     {
15399 	if (rettv != NULL && verbose)
15400 	    EMSG2(_(e_undefvar), name);
15401 	ret = FAIL;
15402     }
15403     else if (rettv != NULL)
15404 	copy_tv(tv, rettv);
15405 
15406     name[len] = cc;
15407 
15408     return ret;
15409 }
15410 
15411 /*
15412  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15413  * Also handle function call with Funcref variable: func(expr)
15414  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15415  */
15416     static int
15417 handle_subscript(arg, rettv, evaluate, verbose)
15418     char_u	**arg;
15419     typval_T	*rettv;
15420     int		evaluate;	/* do more than finding the end */
15421     int		verbose;	/* give error messages */
15422 {
15423     int		ret = OK;
15424     dict_T	*selfdict = NULL;
15425     char_u	*s;
15426     int		len;
15427     typval_T	functv;
15428 
15429     while (ret == OK
15430 	    && (**arg == '['
15431 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15432 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15433 	    && !vim_iswhite(*(*arg - 1)))
15434     {
15435 	if (**arg == '(')
15436 	{
15437 	    /* need to copy the funcref so that we can clear rettv */
15438 	    functv = *rettv;
15439 	    rettv->v_type = VAR_UNKNOWN;
15440 
15441 	    /* Invoke the function.  Recursive! */
15442 	    s = functv.vval.v_string;
15443 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15444 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15445 			&len, evaluate, selfdict);
15446 
15447 	    /* Clear the funcref afterwards, so that deleting it while
15448 	     * evaluating the arguments is possible (see test55). */
15449 	    clear_tv(&functv);
15450 
15451 	    /* Stop the expression evaluation when immediately aborting on
15452 	     * error, or when an interrupt occurred or an exception was thrown
15453 	     * but not caught. */
15454 	    if (aborting())
15455 	    {
15456 		if (ret == OK)
15457 		    clear_tv(rettv);
15458 		ret = FAIL;
15459 	    }
15460 	    dict_unref(selfdict);
15461 	    selfdict = NULL;
15462 	}
15463 	else /* **arg == '[' || **arg == '.' */
15464 	{
15465 	    dict_unref(selfdict);
15466 	    if (rettv->v_type == VAR_DICT)
15467 	    {
15468 		selfdict = rettv->vval.v_dict;
15469 		if (selfdict != NULL)
15470 		    ++selfdict->dv_refcount;
15471 	    }
15472 	    else
15473 		selfdict = NULL;
15474 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15475 	    {
15476 		clear_tv(rettv);
15477 		ret = FAIL;
15478 	    }
15479 	}
15480     }
15481     dict_unref(selfdict);
15482     return ret;
15483 }
15484 
15485 /*
15486  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15487  * value).
15488  */
15489     static typval_T *
15490 alloc_tv()
15491 {
15492     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15493 }
15494 
15495 /*
15496  * Allocate memory for a variable type-value, and assign a string to it.
15497  * The string "s" must have been allocated, it is consumed.
15498  * Return NULL for out of memory, the variable otherwise.
15499  */
15500     static typval_T *
15501 alloc_string_tv(s)
15502     char_u	*s;
15503 {
15504     typval_T	*rettv;
15505 
15506     rettv = alloc_tv();
15507     if (rettv != NULL)
15508     {
15509 	rettv->v_type = VAR_STRING;
15510 	rettv->vval.v_string = s;
15511     }
15512     else
15513 	vim_free(s);
15514     return rettv;
15515 }
15516 
15517 /*
15518  * Free the memory for a variable type-value.
15519  */
15520     static void
15521 free_tv(varp)
15522     typval_T *varp;
15523 {
15524     if (varp != NULL)
15525     {
15526 	switch (varp->v_type)
15527 	{
15528 	    case VAR_FUNC:
15529 		func_unref(varp->vval.v_string);
15530 		/*FALLTHROUGH*/
15531 	    case VAR_STRING:
15532 		vim_free(varp->vval.v_string);
15533 		break;
15534 	    case VAR_LIST:
15535 		list_unref(varp->vval.v_list);
15536 		break;
15537 	    case VAR_DICT:
15538 		dict_unref(varp->vval.v_dict);
15539 		break;
15540 	    case VAR_NUMBER:
15541 	    case VAR_UNKNOWN:
15542 		break;
15543 	    default:
15544 		EMSG2(_(e_intern2), "free_tv()");
15545 		break;
15546 	}
15547 	vim_free(varp);
15548     }
15549 }
15550 
15551 /*
15552  * Free the memory for a variable value and set the value to NULL or 0.
15553  */
15554     void
15555 clear_tv(varp)
15556     typval_T *varp;
15557 {
15558     if (varp != NULL)
15559     {
15560 	switch (varp->v_type)
15561 	{
15562 	    case VAR_FUNC:
15563 		func_unref(varp->vval.v_string);
15564 		/*FALLTHROUGH*/
15565 	    case VAR_STRING:
15566 		vim_free(varp->vval.v_string);
15567 		varp->vval.v_string = NULL;
15568 		break;
15569 	    case VAR_LIST:
15570 		list_unref(varp->vval.v_list);
15571 		varp->vval.v_list = NULL;
15572 		break;
15573 	    case VAR_DICT:
15574 		dict_unref(varp->vval.v_dict);
15575 		varp->vval.v_dict = NULL;
15576 		break;
15577 	    case VAR_NUMBER:
15578 		varp->vval.v_number = 0;
15579 		break;
15580 	    case VAR_UNKNOWN:
15581 		break;
15582 	    default:
15583 		EMSG2(_(e_intern2), "clear_tv()");
15584 	}
15585 	varp->v_lock = 0;
15586     }
15587 }
15588 
15589 /*
15590  * Set the value of a variable to NULL without freeing items.
15591  */
15592     static void
15593 init_tv(varp)
15594     typval_T *varp;
15595 {
15596     if (varp != NULL)
15597 	vim_memset(varp, 0, sizeof(typval_T));
15598 }
15599 
15600 /*
15601  * Get the number value of a variable.
15602  * If it is a String variable, uses vim_str2nr().
15603  * For incompatible types, return 0.
15604  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15605  * caller of incompatible types: it sets *denote to TRUE if "denote"
15606  * is not NULL or returns -1 otherwise.
15607  */
15608     static long
15609 get_tv_number(varp)
15610     typval_T	*varp;
15611 {
15612     int		error = FALSE;
15613 
15614     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15615 }
15616 
15617     static long
15618 get_tv_number_chk(varp, denote)
15619     typval_T	*varp;
15620     int		*denote;
15621 {
15622     long	n = 0L;
15623 
15624     switch (varp->v_type)
15625     {
15626 	case VAR_NUMBER:
15627 	    return (long)(varp->vval.v_number);
15628 	case VAR_FUNC:
15629 	    EMSG(_("E703: Using a Funcref as a number"));
15630 	    break;
15631 	case VAR_STRING:
15632 	    if (varp->vval.v_string != NULL)
15633 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15634 							TRUE, TRUE, &n, NULL);
15635 	    return n;
15636 	case VAR_LIST:
15637 	    EMSG(_("E745: Using a List as a number"));
15638 	    break;
15639 	case VAR_DICT:
15640 	    EMSG(_("E728: Using a Dictionary as a number"));
15641 	    break;
15642 	default:
15643 	    EMSG2(_(e_intern2), "get_tv_number()");
15644 	    break;
15645     }
15646     if (denote == NULL)		/* useful for values that must be unsigned */
15647 	n = -1;
15648     else
15649 	*denote = TRUE;
15650     return n;
15651 }
15652 
15653 /*
15654  * Get the lnum from the first argument.  Also accepts ".", "$", etc.
15655  * Returns -1 on error.
15656  */
15657     static linenr_T
15658 get_tv_lnum(argvars)
15659     typval_T	*argvars;
15660 {
15661     typval_T	rettv;
15662     linenr_T	lnum;
15663 
15664     lnum = get_tv_number_chk(&argvars[0], NULL);
15665     if (lnum == 0)  /* no valid number, try using line() */
15666     {
15667 	rettv.v_type = VAR_NUMBER;
15668 	f_line(argvars, &rettv);
15669 	lnum = rettv.vval.v_number;
15670 	clear_tv(&rettv);
15671     }
15672     return lnum;
15673 }
15674 
15675 /*
15676  * Get the string value of a variable.
15677  * If it is a Number variable, the number is converted into a string.
15678  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
15679  * get_tv_string_buf() uses a given buffer.
15680  * If the String variable has never been set, return an empty string.
15681  * Never returns NULL;
15682  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
15683  * NULL on error.
15684  */
15685     static char_u *
15686 get_tv_string(varp)
15687     typval_T	*varp;
15688 {
15689     static char_u   mybuf[NUMBUFLEN];
15690 
15691     return get_tv_string_buf(varp, mybuf);
15692 }
15693 
15694     static char_u *
15695 get_tv_string_buf(varp, buf)
15696     typval_T	*varp;
15697     char_u	*buf;
15698 {
15699     char_u	*res =  get_tv_string_buf_chk(varp, buf);
15700 
15701     return res != NULL ? res : (char_u *)"";
15702 }
15703 
15704     static char_u *
15705 get_tv_string_chk(varp)
15706     typval_T	*varp;
15707 {
15708     static char_u   mybuf[NUMBUFLEN];
15709 
15710     return get_tv_string_buf_chk(varp, mybuf);
15711 }
15712 
15713     static char_u *
15714 get_tv_string_buf_chk(varp, buf)
15715     typval_T	*varp;
15716     char_u	*buf;
15717 {
15718     switch (varp->v_type)
15719     {
15720 	case VAR_NUMBER:
15721 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
15722 	    return buf;
15723 	case VAR_FUNC:
15724 	    EMSG(_("E729: using Funcref as a String"));
15725 	    break;
15726 	case VAR_LIST:
15727 	    EMSG(_("E730: using List as a String"));
15728 	    break;
15729 	case VAR_DICT:
15730 	    EMSG(_("E731: using Dictionary as a String"));
15731 	    break;
15732 	case VAR_STRING:
15733 	    if (varp->vval.v_string != NULL)
15734 		return varp->vval.v_string;
15735 	    return (char_u *)"";
15736 	default:
15737 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
15738 	    break;
15739     }
15740     return NULL;
15741 }
15742 
15743 /*
15744  * Find variable "name" in the list of variables.
15745  * Return a pointer to it if found, NULL if not found.
15746  * Careful: "a:0" variables don't have a name.
15747  * When "htp" is not NULL we are writing to the variable, set "htp" to the
15748  * hashtab_T used.
15749  */
15750     static dictitem_T *
15751 find_var(name, htp)
15752     char_u	*name;
15753     hashtab_T	**htp;
15754 {
15755     char_u	*varname;
15756     hashtab_T	*ht;
15757 
15758     ht = find_var_ht(name, &varname);
15759     if (htp != NULL)
15760 	*htp = ht;
15761     if (ht == NULL)
15762 	return NULL;
15763     return find_var_in_ht(ht, varname, htp != NULL);
15764 }
15765 
15766 /*
15767  * Find variable "varname" in hashtab "ht".
15768  * Returns NULL if not found.
15769  */
15770     static dictitem_T *
15771 find_var_in_ht(ht, varname, writing)
15772     hashtab_T	*ht;
15773     char_u	*varname;
15774     int		writing;
15775 {
15776     hashitem_T	*hi;
15777 
15778     if (*varname == NUL)
15779     {
15780 	/* Must be something like "s:", otherwise "ht" would be NULL. */
15781 	switch (varname[-2])
15782 	{
15783 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
15784 	    case 'g': return &globvars_var;
15785 	    case 'v': return &vimvars_var;
15786 	    case 'b': return &curbuf->b_bufvar;
15787 	    case 'w': return &curwin->w_winvar;
15788 	    case 'l': return current_funccal == NULL
15789 					? NULL : &current_funccal->l_vars_var;
15790 	    case 'a': return current_funccal == NULL
15791 				       ? NULL : &current_funccal->l_avars_var;
15792 	}
15793 	return NULL;
15794     }
15795 
15796     hi = hash_find(ht, varname);
15797     if (HASHITEM_EMPTY(hi))
15798     {
15799 	/* For global variables we may try auto-loading the script.  If it
15800 	 * worked find the variable again.  Don't auto-load a script if it was
15801 	 * loaded already, otherwise it would be loaded every time when
15802 	 * checking if a function name is a Funcref variable. */
15803 	if (ht == &globvarht && !writing
15804 			    && script_autoload(varname, FALSE) && !aborting())
15805 	    hi = hash_find(ht, varname);
15806 	if (HASHITEM_EMPTY(hi))
15807 	    return NULL;
15808     }
15809     return HI2DI(hi);
15810 }
15811 
15812 /*
15813  * Find the hashtab used for a variable name.
15814  * Set "varname" to the start of name without ':'.
15815  */
15816     static hashtab_T *
15817 find_var_ht(name, varname)
15818     char_u  *name;
15819     char_u  **varname;
15820 {
15821     hashitem_T	*hi;
15822 
15823     if (name[1] != ':')
15824     {
15825 	/* The name must not start with a colon or #. */
15826 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
15827 	    return NULL;
15828 	*varname = name;
15829 
15830 	/* "version" is "v:version" in all scopes */
15831 	hi = hash_find(&compat_hashtab, name);
15832 	if (!HASHITEM_EMPTY(hi))
15833 	    return &compat_hashtab;
15834 
15835 	if (current_funccal == NULL)
15836 	    return &globvarht;			/* global variable */
15837 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
15838     }
15839     *varname = name + 2;
15840     if (*name == 'g')				/* global variable */
15841 	return &globvarht;
15842     /* There must be no ':' or '#' in the rest of the name, unless g: is used
15843      */
15844     if (vim_strchr(name + 2, ':') != NULL
15845 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
15846 	return NULL;
15847     if (*name == 'b')				/* buffer variable */
15848 	return &curbuf->b_vars.dv_hashtab;
15849     if (*name == 'w')				/* window variable */
15850 	return &curwin->w_vars.dv_hashtab;
15851     if (*name == 'v')				/* v: variable */
15852 	return &vimvarht;
15853     if (*name == 'a' && current_funccal != NULL) /* function argument */
15854 	return &current_funccal->l_avars.dv_hashtab;
15855     if (*name == 'l' && current_funccal != NULL) /* local function variable */
15856 	return &current_funccal->l_vars.dv_hashtab;
15857     if (*name == 's'				/* script variable */
15858 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
15859 	return &SCRIPT_VARS(current_SID);
15860     return NULL;
15861 }
15862 
15863 /*
15864  * Get the string value of a (global/local) variable.
15865  * Returns NULL when it doesn't exist.
15866  */
15867     char_u *
15868 get_var_value(name)
15869     char_u	*name;
15870 {
15871     dictitem_T	*v;
15872 
15873     v = find_var(name, NULL);
15874     if (v == NULL)
15875 	return NULL;
15876     return get_tv_string(&v->di_tv);
15877 }
15878 
15879 /*
15880  * Allocate a new hashtab for a sourced script.  It will be used while
15881  * sourcing this script and when executing functions defined in the script.
15882  */
15883     void
15884 new_script_vars(id)
15885     scid_T id;
15886 {
15887     int		i;
15888     hashtab_T	*ht;
15889     scriptvar_T *sv;
15890 
15891     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
15892     {
15893 	/* Re-allocating ga_data means that an ht_array pointing to
15894 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
15895 	 * at its init value.  Also reset "v_dict", it's always the same. */
15896 	for (i = 1; i <= ga_scripts.ga_len; ++i)
15897 	{
15898 	    ht = &SCRIPT_VARS(i);
15899 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
15900 		ht->ht_array = ht->ht_smallarray;
15901 	    sv = &SCRIPT_SV(i);
15902 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
15903 	}
15904 
15905 	while (ga_scripts.ga_len < id)
15906 	{
15907 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
15908 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
15909 	    ++ga_scripts.ga_len;
15910 	}
15911     }
15912 }
15913 
15914 /*
15915  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
15916  * point to it.
15917  */
15918     void
15919 init_var_dict(dict, dict_var)
15920     dict_T	*dict;
15921     dictitem_T	*dict_var;
15922 {
15923     hash_init(&dict->dv_hashtab);
15924     dict->dv_refcount = 99999;
15925     dict_var->di_tv.vval.v_dict = dict;
15926     dict_var->di_tv.v_type = VAR_DICT;
15927     dict_var->di_tv.v_lock = VAR_FIXED;
15928     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
15929     dict_var->di_key[0] = NUL;
15930 }
15931 
15932 /*
15933  * Clean up a list of internal variables.
15934  * Frees all allocated variables and the value they contain.
15935  * Clears hashtab "ht", does not free it.
15936  */
15937     void
15938 vars_clear(ht)
15939     hashtab_T *ht;
15940 {
15941     vars_clear_ext(ht, TRUE);
15942 }
15943 
15944 /*
15945  * Like vars_clear(), but only free the value if "free_val" is TRUE.
15946  */
15947     static void
15948 vars_clear_ext(ht, free_val)
15949     hashtab_T	*ht;
15950     int		free_val;
15951 {
15952     int		todo;
15953     hashitem_T	*hi;
15954     dictitem_T	*v;
15955 
15956     hash_lock(ht);
15957     todo = ht->ht_used;
15958     for (hi = ht->ht_array; todo > 0; ++hi)
15959     {
15960 	if (!HASHITEM_EMPTY(hi))
15961 	{
15962 	    --todo;
15963 
15964 	    /* Free the variable.  Don't remove it from the hashtab,
15965 	     * ht_array might change then.  hash_clear() takes care of it
15966 	     * later. */
15967 	    v = HI2DI(hi);
15968 	    if (free_val)
15969 		clear_tv(&v->di_tv);
15970 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
15971 		vim_free(v);
15972 	}
15973     }
15974     hash_clear(ht);
15975     ht->ht_used = 0;
15976 }
15977 
15978 /*
15979  * Delete a variable from hashtab "ht" at item "hi".
15980  * Clear the variable value and free the dictitem.
15981  */
15982     static void
15983 delete_var(ht, hi)
15984     hashtab_T	*ht;
15985     hashitem_T	*hi;
15986 {
15987     dictitem_T	*di = HI2DI(hi);
15988 
15989     hash_remove(ht, hi);
15990     clear_tv(&di->di_tv);
15991     vim_free(di);
15992 }
15993 
15994 /*
15995  * List the value of one internal variable.
15996  */
15997     static void
15998 list_one_var(v, prefix)
15999     dictitem_T	*v;
16000     char_u	*prefix;
16001 {
16002     char_u	*tofree;
16003     char_u	*s;
16004     char_u	numbuf[NUMBUFLEN];
16005 
16006     s = echo_string(&v->di_tv, &tofree, numbuf);
16007     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16008 						s == NULL ? (char_u *)"" : s);
16009     vim_free(tofree);
16010 }
16011 
16012     static void
16013 list_one_var_a(prefix, name, type, string)
16014     char_u	*prefix;
16015     char_u	*name;
16016     int		type;
16017     char_u	*string;
16018 {
16019     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16020     if (name != NULL)	/* "a:" vars don't have a name stored */
16021 	msg_puts(name);
16022     msg_putchar(' ');
16023     msg_advance(22);
16024     if (type == VAR_NUMBER)
16025 	msg_putchar('#');
16026     else if (type == VAR_FUNC)
16027 	msg_putchar('*');
16028     else if (type == VAR_LIST)
16029     {
16030 	msg_putchar('[');
16031 	if (*string == '[')
16032 	    ++string;
16033     }
16034     else if (type == VAR_DICT)
16035     {
16036 	msg_putchar('{');
16037 	if (*string == '{')
16038 	    ++string;
16039     }
16040     else
16041 	msg_putchar(' ');
16042 
16043     msg_outtrans(string);
16044 
16045     if (type == VAR_FUNC)
16046 	msg_puts((char_u *)"()");
16047 }
16048 
16049 /*
16050  * Set variable "name" to value in "tv".
16051  * If the variable already exists, the value is updated.
16052  * Otherwise the variable is created.
16053  */
16054     static void
16055 set_var(name, tv, copy)
16056     char_u	*name;
16057     typval_T	*tv;
16058     int		copy;	    /* make copy of value in "tv" */
16059 {
16060     dictitem_T	*v;
16061     char_u	*varname;
16062     hashtab_T	*ht;
16063     char_u	*p;
16064 
16065     if (tv->v_type == VAR_FUNC)
16066     {
16067 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16068 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16069 							 ? name[2] : name[0]))
16070 	{
16071 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16072 	    return;
16073 	}
16074 	if (function_exists(name))
16075 	{
16076 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16077 									name);
16078 	    return;
16079 	}
16080     }
16081 
16082     ht = find_var_ht(name, &varname);
16083     if (ht == NULL || *varname == NUL)
16084     {
16085 	EMSG2(_(e_illvar), name);
16086 	return;
16087     }
16088 
16089     v = find_var_in_ht(ht, varname, TRUE);
16090     if (v != NULL)
16091     {
16092 	/* existing variable, need to clear the value */
16093 	if (var_check_ro(v->di_flags, name)
16094 				      || tv_check_lock(v->di_tv.v_lock, name))
16095 	    return;
16096 	if (v->di_tv.v_type != tv->v_type
16097 		&& !((v->di_tv.v_type == VAR_STRING
16098 			|| v->di_tv.v_type == VAR_NUMBER)
16099 		    && (tv->v_type == VAR_STRING
16100 			|| tv->v_type == VAR_NUMBER)))
16101 	{
16102 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16103 	    return;
16104 	}
16105 
16106 	/*
16107 	 * Handle setting internal v: variables separately: we don't change
16108 	 * the type.
16109 	 */
16110 	if (ht == &vimvarht)
16111 	{
16112 	    if (v->di_tv.v_type == VAR_STRING)
16113 	    {
16114 		vim_free(v->di_tv.vval.v_string);
16115 		if (copy || tv->v_type != VAR_STRING)
16116 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16117 		else
16118 		{
16119 		    /* Take over the string to avoid an extra alloc/free. */
16120 		    v->di_tv.vval.v_string = tv->vval.v_string;
16121 		    tv->vval.v_string = NULL;
16122 		}
16123 	    }
16124 	    else if (v->di_tv.v_type != VAR_NUMBER)
16125 		EMSG2(_(e_intern2), "set_var()");
16126 	    else
16127 		v->di_tv.vval.v_number = get_tv_number(tv);
16128 	    return;
16129 	}
16130 
16131 	clear_tv(&v->di_tv);
16132     }
16133     else		    /* add a new variable */
16134     {
16135 	/* Make sure the variable name is valid. */
16136 	for (p = varname; *p != NUL; ++p)
16137 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16138 	    {
16139 		EMSG2(_(e_illvar), varname);
16140 		return;
16141 	    }
16142 
16143 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16144 							  + STRLEN(varname)));
16145 	if (v == NULL)
16146 	    return;
16147 	STRCPY(v->di_key, varname);
16148 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16149 	{
16150 	    vim_free(v);
16151 	    return;
16152 	}
16153 	v->di_flags = 0;
16154     }
16155 
16156     if (copy || tv->v_type == VAR_NUMBER)
16157 	copy_tv(tv, &v->di_tv);
16158     else
16159     {
16160 	v->di_tv = *tv;
16161 	v->di_tv.v_lock = 0;
16162 	init_tv(tv);
16163     }
16164 }
16165 
16166 /*
16167  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16168  * Also give an error message.
16169  */
16170     static int
16171 var_check_ro(flags, name)
16172     int		flags;
16173     char_u	*name;
16174 {
16175     if (flags & DI_FLAGS_RO)
16176     {
16177 	EMSG2(_(e_readonlyvar), name);
16178 	return TRUE;
16179     }
16180     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16181     {
16182 	EMSG2(_(e_readonlysbx), name);
16183 	return TRUE;
16184     }
16185     return FALSE;
16186 }
16187 
16188 /*
16189  * Return TRUE if typeval "tv" is set to be locked (immutable).
16190  * Also give an error message, using "name".
16191  */
16192     static int
16193 tv_check_lock(lock, name)
16194     int		lock;
16195     char_u	*name;
16196 {
16197     if (lock & VAR_LOCKED)
16198     {
16199 	EMSG2(_("E741: Value is locked: %s"),
16200 				name == NULL ? (char_u *)_("Unknown") : name);
16201 	return TRUE;
16202     }
16203     if (lock & VAR_FIXED)
16204     {
16205 	EMSG2(_("E742: Cannot change value of %s"),
16206 				name == NULL ? (char_u *)_("Unknown") : name);
16207 	return TRUE;
16208     }
16209     return FALSE;
16210 }
16211 
16212 /*
16213  * Copy the values from typval_T "from" to typval_T "to".
16214  * When needed allocates string or increases reference count.
16215  * Does not make a copy of a list or dict but copies the reference!
16216  */
16217     static void
16218 copy_tv(from, to)
16219     typval_T *from;
16220     typval_T *to;
16221 {
16222     to->v_type = from->v_type;
16223     to->v_lock = 0;
16224     switch (from->v_type)
16225     {
16226 	case VAR_NUMBER:
16227 	    to->vval.v_number = from->vval.v_number;
16228 	    break;
16229 	case VAR_STRING:
16230 	case VAR_FUNC:
16231 	    if (from->vval.v_string == NULL)
16232 		to->vval.v_string = NULL;
16233 	    else
16234 	    {
16235 		to->vval.v_string = vim_strsave(from->vval.v_string);
16236 		if (from->v_type == VAR_FUNC)
16237 		    func_ref(to->vval.v_string);
16238 	    }
16239 	    break;
16240 	case VAR_LIST:
16241 	    if (from->vval.v_list == NULL)
16242 		to->vval.v_list = NULL;
16243 	    else
16244 	    {
16245 		to->vval.v_list = from->vval.v_list;
16246 		++to->vval.v_list->lv_refcount;
16247 	    }
16248 	    break;
16249 	case VAR_DICT:
16250 	    if (from->vval.v_dict == NULL)
16251 		to->vval.v_dict = NULL;
16252 	    else
16253 	    {
16254 		to->vval.v_dict = from->vval.v_dict;
16255 		++to->vval.v_dict->dv_refcount;
16256 	    }
16257 	    break;
16258 	default:
16259 	    EMSG2(_(e_intern2), "copy_tv()");
16260 	    break;
16261     }
16262 }
16263 
16264 /*
16265  * Make a copy of an item.
16266  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16267  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16268  * reference to an already copied list/dict can be used.
16269  * Returns FAIL or OK.
16270  */
16271     static int
16272 item_copy(from, to, deep, copyID)
16273     typval_T	*from;
16274     typval_T	*to;
16275     int		deep;
16276     int		copyID;
16277 {
16278     static int	recurse = 0;
16279     int		ret = OK;
16280 
16281     if (recurse >= DICT_MAXNEST)
16282     {
16283 	EMSG(_("E698: variable nested too deep for making a copy"));
16284 	return FAIL;
16285     }
16286     ++recurse;
16287 
16288     switch (from->v_type)
16289     {
16290 	case VAR_NUMBER:
16291 	case VAR_STRING:
16292 	case VAR_FUNC:
16293 	    copy_tv(from, to);
16294 	    break;
16295 	case VAR_LIST:
16296 	    to->v_type = VAR_LIST;
16297 	    to->v_lock = 0;
16298 	    if (from->vval.v_list == NULL)
16299 		to->vval.v_list = NULL;
16300 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16301 	    {
16302 		/* use the copy made earlier */
16303 		to->vval.v_list = from->vval.v_list->lv_copylist;
16304 		++to->vval.v_list->lv_refcount;
16305 	    }
16306 	    else
16307 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16308 	    if (to->vval.v_list == NULL)
16309 		ret = FAIL;
16310 	    break;
16311 	case VAR_DICT:
16312 	    to->v_type = VAR_DICT;
16313 	    to->v_lock = 0;
16314 	    if (from->vval.v_dict == NULL)
16315 		to->vval.v_dict = NULL;
16316 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16317 	    {
16318 		/* use the copy made earlier */
16319 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16320 		++to->vval.v_dict->dv_refcount;
16321 	    }
16322 	    else
16323 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16324 	    if (to->vval.v_dict == NULL)
16325 		ret = FAIL;
16326 	    break;
16327 	default:
16328 	    EMSG2(_(e_intern2), "item_copy()");
16329 	    ret = FAIL;
16330     }
16331     --recurse;
16332     return ret;
16333 }
16334 
16335 /*
16336  * ":echo expr1 ..."	print each argument separated with a space, add a
16337  *			newline at the end.
16338  * ":echon expr1 ..."	print each argument plain.
16339  */
16340     void
16341 ex_echo(eap)
16342     exarg_T	*eap;
16343 {
16344     char_u	*arg = eap->arg;
16345     typval_T	rettv;
16346     char_u	*tofree;
16347     char_u	*p;
16348     int		needclr = TRUE;
16349     int		atstart = TRUE;
16350     char_u	numbuf[NUMBUFLEN];
16351 
16352     if (eap->skip)
16353 	++emsg_skip;
16354     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16355     {
16356 	p = arg;
16357 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16358 	{
16359 	    /*
16360 	     * Report the invalid expression unless the expression evaluation
16361 	     * has been cancelled due to an aborting error, an interrupt, or an
16362 	     * exception.
16363 	     */
16364 	    if (!aborting())
16365 		EMSG2(_(e_invexpr2), p);
16366 	    break;
16367 	}
16368 	if (!eap->skip)
16369 	{
16370 	    if (atstart)
16371 	    {
16372 		atstart = FALSE;
16373 		/* Call msg_start() after eval1(), evaluating the expression
16374 		 * may cause a message to appear. */
16375 		if (eap->cmdidx == CMD_echo)
16376 		    msg_start();
16377 	    }
16378 	    else if (eap->cmdidx == CMD_echo)
16379 		msg_puts_attr((char_u *)" ", echo_attr);
16380 	    p = echo_string(&rettv, &tofree, numbuf);
16381 	    if (p != NULL)
16382 		for ( ; *p != NUL && !got_int; ++p)
16383 		{
16384 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16385 		    {
16386 			if (*p != TAB && needclr)
16387 			{
16388 			    /* remove any text still there from the command */
16389 			    msg_clr_eos();
16390 			    needclr = FALSE;
16391 			}
16392 			msg_putchar_attr(*p, echo_attr);
16393 		    }
16394 		    else
16395 		    {
16396 #ifdef FEAT_MBYTE
16397 			if (has_mbyte)
16398 			{
16399 			    int i = (*mb_ptr2len_check)(p);
16400 
16401 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16402 			    p += i - 1;
16403 			}
16404 			else
16405 #endif
16406 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16407 		    }
16408 		}
16409 	    vim_free(tofree);
16410 	}
16411 	clear_tv(&rettv);
16412 	arg = skipwhite(arg);
16413     }
16414     eap->nextcmd = check_nextcmd(arg);
16415 
16416     if (eap->skip)
16417 	--emsg_skip;
16418     else
16419     {
16420 	/* remove text that may still be there from the command */
16421 	if (needclr)
16422 	    msg_clr_eos();
16423 	if (eap->cmdidx == CMD_echo)
16424 	    msg_end();
16425     }
16426 }
16427 
16428 /*
16429  * ":echohl {name}".
16430  */
16431     void
16432 ex_echohl(eap)
16433     exarg_T	*eap;
16434 {
16435     int		id;
16436 
16437     id = syn_name2id(eap->arg);
16438     if (id == 0)
16439 	echo_attr = 0;
16440     else
16441 	echo_attr = syn_id2attr(id);
16442 }
16443 
16444 /*
16445  * ":execute expr1 ..."	execute the result of an expression.
16446  * ":echomsg expr1 ..."	Print a message
16447  * ":echoerr expr1 ..."	Print an error
16448  * Each gets spaces around each argument and a newline at the end for
16449  * echo commands
16450  */
16451     void
16452 ex_execute(eap)
16453     exarg_T	*eap;
16454 {
16455     char_u	*arg = eap->arg;
16456     typval_T	rettv;
16457     int		ret = OK;
16458     char_u	*p;
16459     garray_T	ga;
16460     int		len;
16461     int		save_did_emsg;
16462 
16463     ga_init2(&ga, 1, 80);
16464 
16465     if (eap->skip)
16466 	++emsg_skip;
16467     while (*arg != NUL && *arg != '|' && *arg != '\n')
16468     {
16469 	p = arg;
16470 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16471 	{
16472 	    /*
16473 	     * Report the invalid expression unless the expression evaluation
16474 	     * has been cancelled due to an aborting error, an interrupt, or an
16475 	     * exception.
16476 	     */
16477 	    if (!aborting())
16478 		EMSG2(_(e_invexpr2), p);
16479 	    ret = FAIL;
16480 	    break;
16481 	}
16482 
16483 	if (!eap->skip)
16484 	{
16485 	    p = get_tv_string(&rettv);
16486 	    len = (int)STRLEN(p);
16487 	    if (ga_grow(&ga, len + 2) == FAIL)
16488 	    {
16489 		clear_tv(&rettv);
16490 		ret = FAIL;
16491 		break;
16492 	    }
16493 	    if (ga.ga_len)
16494 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16495 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16496 	    ga.ga_len += len;
16497 	}
16498 
16499 	clear_tv(&rettv);
16500 	arg = skipwhite(arg);
16501     }
16502 
16503     if (ret != FAIL && ga.ga_data != NULL)
16504     {
16505 	if (eap->cmdidx == CMD_echomsg)
16506 	    MSG_ATTR(ga.ga_data, echo_attr);
16507 	else if (eap->cmdidx == CMD_echoerr)
16508 	{
16509 	    /* We don't want to abort following commands, restore did_emsg. */
16510 	    save_did_emsg = did_emsg;
16511 	    EMSG((char_u *)ga.ga_data);
16512 	    if (!force_abort)
16513 		did_emsg = save_did_emsg;
16514 	}
16515 	else if (eap->cmdidx == CMD_execute)
16516 	    do_cmdline((char_u *)ga.ga_data,
16517 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16518     }
16519 
16520     ga_clear(&ga);
16521 
16522     if (eap->skip)
16523 	--emsg_skip;
16524 
16525     eap->nextcmd = check_nextcmd(arg);
16526 }
16527 
16528 /*
16529  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16530  * "arg" points to the "&" or '+' when called, to "option" when returning.
16531  * Returns NULL when no option name found.  Otherwise pointer to the char
16532  * after the option name.
16533  */
16534     static char_u *
16535 find_option_end(arg, opt_flags)
16536     char_u	**arg;
16537     int		*opt_flags;
16538 {
16539     char_u	*p = *arg;
16540 
16541     ++p;
16542     if (*p == 'g' && p[1] == ':')
16543     {
16544 	*opt_flags = OPT_GLOBAL;
16545 	p += 2;
16546     }
16547     else if (*p == 'l' && p[1] == ':')
16548     {
16549 	*opt_flags = OPT_LOCAL;
16550 	p += 2;
16551     }
16552     else
16553 	*opt_flags = 0;
16554 
16555     if (!ASCII_ISALPHA(*p))
16556 	return NULL;
16557     *arg = p;
16558 
16559     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16560 	p += 4;	    /* termcap option */
16561     else
16562 	while (ASCII_ISALPHA(*p))
16563 	    ++p;
16564     return p;
16565 }
16566 
16567 /*
16568  * ":function"
16569  */
16570     void
16571 ex_function(eap)
16572     exarg_T	*eap;
16573 {
16574     char_u	*theline;
16575     int		j;
16576     int		c;
16577     int		saved_did_emsg;
16578     char_u	*name = NULL;
16579     char_u	*p;
16580     char_u	*arg;
16581     garray_T	newargs;
16582     garray_T	newlines;
16583     int		varargs = FALSE;
16584     int		mustend = FALSE;
16585     int		flags = 0;
16586     ufunc_T	*fp;
16587     int		indent;
16588     int		nesting;
16589     char_u	*skip_until = NULL;
16590     dictitem_T	*v;
16591     funcdict_T	fudi;
16592     static int	func_nr = 0;	    /* number for nameless function */
16593     int		paren;
16594     hashtab_T	*ht;
16595     int		todo;
16596     hashitem_T	*hi;
16597 
16598     /*
16599      * ":function" without argument: list functions.
16600      */
16601     if (ends_excmd(*eap->arg))
16602     {
16603 	if (!eap->skip)
16604 	{
16605 	    todo = func_hashtab.ht_used;
16606 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16607 	    {
16608 		if (!HASHITEM_EMPTY(hi))
16609 		{
16610 		    --todo;
16611 		    fp = HI2UF(hi);
16612 		    if (!isdigit(*fp->uf_name))
16613 			list_func_head(fp, FALSE);
16614 		}
16615 	    }
16616 	}
16617 	eap->nextcmd = check_nextcmd(eap->arg);
16618 	return;
16619     }
16620 
16621     /*
16622      * Get the function name.  There are these situations:
16623      * func	    normal function name
16624      *		    "name" == func, "fudi.fd_dict" == NULL
16625      * dict.func    new dictionary entry
16626      *		    "name" == NULL, "fudi.fd_dict" set,
16627      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
16628      * dict.func    existing dict entry with a Funcref
16629      *		    "name" == func, "fudi.fd_dict" set,
16630      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16631      * dict.func    existing dict entry that's not a Funcref
16632      *		    "name" == NULL, "fudi.fd_dict" set,
16633      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
16634      */
16635     p = eap->arg;
16636     name = trans_function_name(&p, eap->skip, 0, &fudi);
16637     paren = (vim_strchr(p, '(') != NULL);
16638     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
16639     {
16640 	/*
16641 	 * Return on an invalid expression in braces, unless the expression
16642 	 * evaluation has been cancelled due to an aborting error, an
16643 	 * interrupt, or an exception.
16644 	 */
16645 	if (!aborting())
16646 	{
16647 	    if (!eap->skip && fudi.fd_newkey != NULL)
16648 		EMSG2(_(e_dictkey), fudi.fd_newkey);
16649 	    vim_free(fudi.fd_newkey);
16650 	    return;
16651 	}
16652 	else
16653 	    eap->skip = TRUE;
16654     }
16655     /* An error in a function call during evaluation of an expression in magic
16656      * braces should not cause the function not to be defined. */
16657     saved_did_emsg = did_emsg;
16658     did_emsg = FALSE;
16659 
16660     /*
16661      * ":function func" with only function name: list function.
16662      */
16663     if (!paren)
16664     {
16665 	if (!ends_excmd(*skipwhite(p)))
16666 	{
16667 	    EMSG(_(e_trailing));
16668 	    goto ret_free;
16669 	}
16670 	eap->nextcmd = check_nextcmd(p);
16671 	if (eap->nextcmd != NULL)
16672 	    *p = NUL;
16673 	if (!eap->skip && !got_int)
16674 	{
16675 	    fp = find_func(name);
16676 	    if (fp != NULL)
16677 	    {
16678 		list_func_head(fp, TRUE);
16679 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
16680 		{
16681 		    msg_putchar('\n');
16682 		    msg_outnum((long)(j + 1));
16683 		    if (j < 9)
16684 			msg_putchar(' ');
16685 		    if (j < 99)
16686 			msg_putchar(' ');
16687 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
16688 		    out_flush();	/* show a line at a time */
16689 		    ui_breakcheck();
16690 		}
16691 		if (!got_int)
16692 		{
16693 		    msg_putchar('\n');
16694 		    msg_puts((char_u *)"   endfunction");
16695 		}
16696 	    }
16697 	    else
16698 		emsg_funcname("E123: Undefined function: %s", name);
16699 	}
16700 	goto ret_free;
16701     }
16702 
16703     /*
16704      * ":function name(arg1, arg2)" Define function.
16705      */
16706     p = skipwhite(p);
16707     if (*p != '(')
16708     {
16709 	if (!eap->skip)
16710 	{
16711 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
16712 	    goto ret_free;
16713 	}
16714 	/* attempt to continue by skipping some text */
16715 	if (vim_strchr(p, '(') != NULL)
16716 	    p = vim_strchr(p, '(');
16717     }
16718     p = skipwhite(p + 1);
16719 
16720     ga_init2(&newargs, (int)sizeof(char_u *), 3);
16721     ga_init2(&newlines, (int)sizeof(char_u *), 3);
16722 
16723     if (!eap->skip)
16724     {
16725 	/* Check the name of the function. */
16726 	if (name != NULL)
16727 	    arg = name;
16728 	else
16729 	    arg = fudi.fd_newkey;
16730 	if (arg != NULL)
16731 	{
16732 	    if (*arg == K_SPECIAL)
16733 		j = 3;
16734 	    else
16735 		j = 0;
16736 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
16737 						      : eval_isnamec(arg[j])))
16738 		++j;
16739 	    if (arg[j] != NUL)
16740 		emsg_funcname(_(e_invarg2), arg);
16741 	}
16742     }
16743 
16744     /*
16745      * Isolate the arguments: "arg1, arg2, ...)"
16746      */
16747     while (*p != ')')
16748     {
16749 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
16750 	{
16751 	    varargs = TRUE;
16752 	    p += 3;
16753 	    mustend = TRUE;
16754 	}
16755 	else
16756 	{
16757 	    arg = p;
16758 	    while (ASCII_ISALNUM(*p) || *p == '_')
16759 		++p;
16760 	    if (arg == p || isdigit(*arg)
16761 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
16762 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
16763 	    {
16764 		if (!eap->skip)
16765 		    EMSG2(_("E125: Illegal argument: %s"), arg);
16766 		break;
16767 	    }
16768 	    if (ga_grow(&newargs, 1) == FAIL)
16769 		goto erret;
16770 	    c = *p;
16771 	    *p = NUL;
16772 	    arg = vim_strsave(arg);
16773 	    if (arg == NULL)
16774 		goto erret;
16775 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
16776 	    *p = c;
16777 	    newargs.ga_len++;
16778 	    if (*p == ',')
16779 		++p;
16780 	    else
16781 		mustend = TRUE;
16782 	}
16783 	p = skipwhite(p);
16784 	if (mustend && *p != ')')
16785 	{
16786 	    if (!eap->skip)
16787 		EMSG2(_(e_invarg2), eap->arg);
16788 	    break;
16789 	}
16790     }
16791     ++p;	/* skip the ')' */
16792 
16793     /* find extra arguments "range", "dict" and "abort" */
16794     for (;;)
16795     {
16796 	p = skipwhite(p);
16797 	if (STRNCMP(p, "range", 5) == 0)
16798 	{
16799 	    flags |= FC_RANGE;
16800 	    p += 5;
16801 	}
16802 	else if (STRNCMP(p, "dict", 4) == 0)
16803 	{
16804 	    flags |= FC_DICT;
16805 	    p += 4;
16806 	}
16807 	else if (STRNCMP(p, "abort", 5) == 0)
16808 	{
16809 	    flags |= FC_ABORT;
16810 	    p += 5;
16811 	}
16812 	else
16813 	    break;
16814     }
16815 
16816     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
16817 	EMSG(_(e_trailing));
16818 
16819     /*
16820      * Read the body of the function, until ":endfunction" is found.
16821      */
16822     if (KeyTyped)
16823     {
16824 	/* Check if the function already exists, don't let the user type the
16825 	 * whole function before telling him it doesn't work!  For a script we
16826 	 * need to skip the body to be able to find what follows. */
16827 	if (!eap->skip && !eap->forceit)
16828 	{
16829 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
16830 		EMSG(_(e_funcdict));
16831 	    else if (name != NULL && find_func(name) != NULL)
16832 		emsg_funcname(e_funcexts, name);
16833 	}
16834 
16835 	if (!eap->skip && did_emsg)
16836 	    goto erret;
16837 
16838 	msg_putchar('\n');	    /* don't overwrite the function name */
16839 	cmdline_row = msg_row;
16840     }
16841 
16842     indent = 2;
16843     nesting = 0;
16844     for (;;)
16845     {
16846 	msg_scroll = TRUE;
16847 	need_wait_return = FALSE;
16848 	if (eap->getline == NULL)
16849 	    theline = getcmdline(':', 0L, indent);
16850 	else
16851 	    theline = eap->getline(':', eap->cookie, indent);
16852 	if (KeyTyped)
16853 	    lines_left = Rows - 1;
16854 	if (theline == NULL)
16855 	{
16856 	    EMSG(_("E126: Missing :endfunction"));
16857 	    goto erret;
16858 	}
16859 
16860 	if (skip_until != NULL)
16861 	{
16862 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
16863 	     * don't check for ":endfunc". */
16864 	    if (STRCMP(theline, skip_until) == 0)
16865 	    {
16866 		vim_free(skip_until);
16867 		skip_until = NULL;
16868 	    }
16869 	}
16870 	else
16871 	{
16872 	    /* skip ':' and blanks*/
16873 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
16874 		;
16875 
16876 	    /* Check for "endfunction". */
16877 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
16878 	    {
16879 		vim_free(theline);
16880 		break;
16881 	    }
16882 
16883 	    /* Increase indent inside "if", "while", "for" and "try", decrease
16884 	     * at "end". */
16885 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
16886 		indent -= 2;
16887 	    else if (STRNCMP(p, "if", 2) == 0
16888 		    || STRNCMP(p, "wh", 2) == 0
16889 		    || STRNCMP(p, "for", 3) == 0
16890 		    || STRNCMP(p, "try", 3) == 0)
16891 		indent += 2;
16892 
16893 	    /* Check for defining a function inside this function. */
16894 	    if (checkforcmd(&p, "function", 2))
16895 	    {
16896 		if (*p == '!')
16897 		    p = skipwhite(p + 1);
16898 		p += eval_fname_script(p);
16899 		if (ASCII_ISALPHA(*p))
16900 		{
16901 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
16902 		    if (*skipwhite(p) == '(')
16903 		    {
16904 			++nesting;
16905 			indent += 2;
16906 		    }
16907 		}
16908 	    }
16909 
16910 	    /* Check for ":append" or ":insert". */
16911 	    p = skip_range(p, NULL);
16912 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
16913 		    || (p[0] == 'i'
16914 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
16915 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
16916 		skip_until = vim_strsave((char_u *)".");
16917 
16918 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
16919 	    arg = skipwhite(skiptowhite(p));
16920 	    if (arg[0] == '<' && arg[1] =='<'
16921 		    && ((p[0] == 'p' && p[1] == 'y'
16922 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
16923 			|| (p[0] == 'p' && p[1] == 'e'
16924 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
16925 			|| (p[0] == 't' && p[1] == 'c'
16926 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
16927 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
16928 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
16929 			|| (p[0] == 'm' && p[1] == 'z'
16930 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
16931 			))
16932 	    {
16933 		/* ":python <<" continues until a dot, like ":append" */
16934 		p = skipwhite(arg + 2);
16935 		if (*p == NUL)
16936 		    skip_until = vim_strsave((char_u *)".");
16937 		else
16938 		    skip_until = vim_strsave(p);
16939 	    }
16940 	}
16941 
16942 	/* Add the line to the function. */
16943 	if (ga_grow(&newlines, 1) == FAIL)
16944 	{
16945 	    vim_free(theline);
16946 	    goto erret;
16947 	}
16948 
16949 	/* Copy the line to newly allocated memory.  get_one_sourceline()
16950 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
16951 	 * is an extra alloc/free. */
16952 	p = vim_strsave(theline);
16953 	if (p != NULL)
16954 	{
16955 	    vim_free(theline);
16956 	    theline = p;
16957 	}
16958 
16959 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
16960 	newlines.ga_len++;
16961     }
16962 
16963     /* Don't define the function when skipping commands or when an error was
16964      * detected. */
16965     if (eap->skip || did_emsg)
16966 	goto erret;
16967 
16968     /*
16969      * If there are no errors, add the function
16970      */
16971     if (fudi.fd_dict == NULL)
16972     {
16973 	v = find_var(name, &ht);
16974 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
16975 	{
16976 	    emsg_funcname("E707: Function name conflicts with variable: %s",
16977 									name);
16978 	    goto erret;
16979 	}
16980 
16981 	fp = find_func(name);
16982 	if (fp != NULL)
16983 	{
16984 	    if (!eap->forceit)
16985 	    {
16986 		emsg_funcname(e_funcexts, name);
16987 		goto erret;
16988 	    }
16989 	    if (fp->uf_calls > 0)
16990 	    {
16991 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
16992 									name);
16993 		goto erret;
16994 	    }
16995 	    /* redefine existing function */
16996 	    ga_clear_strings(&(fp->uf_args));
16997 	    ga_clear_strings(&(fp->uf_lines));
16998 	    vim_free(name);
16999 	    name = NULL;
17000 	}
17001     }
17002     else
17003     {
17004 	char	numbuf[20];
17005 
17006 	fp = NULL;
17007 	if (fudi.fd_newkey == NULL && !eap->forceit)
17008 	{
17009 	    EMSG(_(e_funcdict));
17010 	    goto erret;
17011 	}
17012 	if (fudi.fd_di == NULL)
17013 	{
17014 	    /* Can't add a function to a locked dictionary */
17015 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17016 		goto erret;
17017 	}
17018 	    /* Can't change an existing function if it is locked */
17019 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17020 	    goto erret;
17021 
17022 	/* Give the function a sequential number.  Can only be used with a
17023 	 * Funcref! */
17024 	vim_free(name);
17025 	sprintf(numbuf, "%d", ++func_nr);
17026 	name = vim_strsave((char_u *)numbuf);
17027 	if (name == NULL)
17028 	    goto erret;
17029     }
17030 
17031     if (fp == NULL)
17032     {
17033 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17034 	{
17035 	    int	    slen, plen;
17036 	    char_u  *scriptname;
17037 
17038 	    /* Check that the autoload name matches the script name. */
17039 	    j = FAIL;
17040 	    if (sourcing_name != NULL)
17041 	    {
17042 		scriptname = autoload_name(name);
17043 		if (scriptname != NULL)
17044 		{
17045 		    p = vim_strchr(scriptname, '/');
17046 		    plen = STRLEN(p);
17047 		    slen = STRLEN(sourcing_name);
17048 		    if (slen > plen && fnamecmp(p,
17049 					    sourcing_name + slen - plen) == 0)
17050 			j = OK;
17051 		    vim_free(scriptname);
17052 		}
17053 	    }
17054 	    if (j == FAIL)
17055 	    {
17056 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17057 		goto erret;
17058 	    }
17059 	}
17060 
17061 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17062 	if (fp == NULL)
17063 	    goto erret;
17064 
17065 	if (fudi.fd_dict != NULL)
17066 	{
17067 	    if (fudi.fd_di == NULL)
17068 	    {
17069 		/* add new dict entry */
17070 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17071 		if (fudi.fd_di == NULL)
17072 		{
17073 		    vim_free(fp);
17074 		    goto erret;
17075 		}
17076 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17077 		{
17078 		    vim_free(fudi.fd_di);
17079 		    goto erret;
17080 		}
17081 	    }
17082 	    else
17083 		/* overwrite existing dict entry */
17084 		clear_tv(&fudi.fd_di->di_tv);
17085 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17086 	    fudi.fd_di->di_tv.v_lock = 0;
17087 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17088 	    fp->uf_refcount = 1;
17089 	}
17090 
17091 	/* insert the new function in the function list */
17092 	STRCPY(fp->uf_name, name);
17093 	hash_add(&func_hashtab, UF2HIKEY(fp));
17094     }
17095     fp->uf_args = newargs;
17096     fp->uf_lines = newlines;
17097 #ifdef FEAT_PROFILE
17098     fp->uf_tml_count = NULL;
17099     fp->uf_tml_total = NULL;
17100     fp->uf_tml_self = NULL;
17101     fp->uf_profiling = FALSE;
17102     if (prof_def_func())
17103 	func_do_profile(fp);
17104 #endif
17105     fp->uf_varargs = varargs;
17106     fp->uf_flags = flags;
17107     fp->uf_calls = 0;
17108     fp->uf_script_ID = current_SID;
17109     goto ret_free;
17110 
17111 erret:
17112     ga_clear_strings(&newargs);
17113     ga_clear_strings(&newlines);
17114 ret_free:
17115     vim_free(skip_until);
17116     vim_free(fudi.fd_newkey);
17117     vim_free(name);
17118     did_emsg |= saved_did_emsg;
17119 }
17120 
17121 /*
17122  * Get a function name, translating "<SID>" and "<SNR>".
17123  * Also handles a Funcref in a List or Dictionary.
17124  * Returns the function name in allocated memory, or NULL for failure.
17125  * flags:
17126  * TFN_INT:   internal function name OK
17127  * TFN_QUIET: be quiet
17128  * Advances "pp" to just after the function name (if no error).
17129  */
17130     static char_u *
17131 trans_function_name(pp, skip, flags, fdp)
17132     char_u	**pp;
17133     int		skip;		/* only find the end, don't evaluate */
17134     int		flags;
17135     funcdict_T	*fdp;		/* return: info about dictionary used */
17136 {
17137     char_u	*name = NULL;
17138     char_u	*start;
17139     char_u	*end;
17140     int		lead;
17141     char_u	sid_buf[20];
17142     int		len;
17143     lval_T	lv;
17144 
17145     if (fdp != NULL)
17146 	vim_memset(fdp, 0, sizeof(funcdict_T));
17147     start = *pp;
17148 
17149     /* Check for hard coded <SNR>: already translated function ID (from a user
17150      * command). */
17151     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17152 						   && (*pp)[2] == (int)KE_SNR)
17153     {
17154 	*pp += 3;
17155 	len = get_id_len(pp) + 3;
17156 	return vim_strnsave(start, len);
17157     }
17158 
17159     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17160      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17161     lead = eval_fname_script(start);
17162     if (lead > 2)
17163 	start += lead;
17164 
17165     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17166 					      lead > 2 ? 0 : FNE_CHECK_START);
17167     if (end == start)
17168     {
17169 	if (!skip)
17170 	    EMSG(_("E129: Function name required"));
17171 	goto theend;
17172     }
17173     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17174     {
17175 	/*
17176 	 * Report an invalid expression in braces, unless the expression
17177 	 * evaluation has been cancelled due to an aborting error, an
17178 	 * interrupt, or an exception.
17179 	 */
17180 	if (!aborting())
17181 	{
17182 	    if (end != NULL)
17183 		EMSG2(_(e_invarg2), start);
17184 	}
17185 	else
17186 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17187 	goto theend;
17188     }
17189 
17190     if (lv.ll_tv != NULL)
17191     {
17192 	if (fdp != NULL)
17193 	{
17194 	    fdp->fd_dict = lv.ll_dict;
17195 	    fdp->fd_newkey = lv.ll_newkey;
17196 	    lv.ll_newkey = NULL;
17197 	    fdp->fd_di = lv.ll_di;
17198 	}
17199 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17200 	{
17201 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17202 	    *pp = end;
17203 	}
17204 	else
17205 	{
17206 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17207 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17208 		EMSG(_(e_funcref));
17209 	    else
17210 		*pp = end;
17211 	    name = NULL;
17212 	}
17213 	goto theend;
17214     }
17215 
17216     if (lv.ll_name == NULL)
17217     {
17218 	/* Error found, but continue after the function name. */
17219 	*pp = end;
17220 	goto theend;
17221     }
17222 
17223     if (lv.ll_exp_name != NULL)
17224 	len = STRLEN(lv.ll_exp_name);
17225     else
17226     {
17227 	if (lead == 2)	/* skip over "s:" */
17228 	    lv.ll_name += 2;
17229 	len = (int)(end - lv.ll_name);
17230     }
17231 
17232     /*
17233      * Copy the function name to allocated memory.
17234      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17235      * Accept <SNR>123_name() outside a script.
17236      */
17237     if (skip)
17238 	lead = 0;	/* do nothing */
17239     else if (lead > 0)
17240     {
17241 	lead = 3;
17242 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17243 	{
17244 	    if (current_SID <= 0)
17245 	    {
17246 		EMSG(_(e_usingsid));
17247 		goto theend;
17248 	    }
17249 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17250 	    lead += (int)STRLEN(sid_buf);
17251 	}
17252     }
17253     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17254     {
17255 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17256 	goto theend;
17257     }
17258     name = alloc((unsigned)(len + lead + 1));
17259     if (name != NULL)
17260     {
17261 	if (lead > 0)
17262 	{
17263 	    name[0] = K_SPECIAL;
17264 	    name[1] = KS_EXTRA;
17265 	    name[2] = (int)KE_SNR;
17266 	    if (lead > 3)	/* If it's "<SID>" */
17267 		STRCPY(name + 3, sid_buf);
17268 	}
17269 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17270 	name[len + lead] = NUL;
17271     }
17272     *pp = end;
17273 
17274 theend:
17275     clear_lval(&lv);
17276     return name;
17277 }
17278 
17279 /*
17280  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17281  * Return 2 if "p" starts with "s:".
17282  * Return 0 otherwise.
17283  */
17284     static int
17285 eval_fname_script(p)
17286     char_u	*p;
17287 {
17288     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17289 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17290 	return 5;
17291     if (p[0] == 's' && p[1] == ':')
17292 	return 2;
17293     return 0;
17294 }
17295 
17296 /*
17297  * Return TRUE if "p" starts with "<SID>" or "s:".
17298  * Only works if eval_fname_script() returned non-zero for "p"!
17299  */
17300     static int
17301 eval_fname_sid(p)
17302     char_u	*p;
17303 {
17304     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17305 }
17306 
17307 /*
17308  * List the head of the function: "name(arg1, arg2)".
17309  */
17310     static void
17311 list_func_head(fp, indent)
17312     ufunc_T	*fp;
17313     int		indent;
17314 {
17315     int		j;
17316 
17317     msg_start();
17318     if (indent)
17319 	MSG_PUTS("   ");
17320     MSG_PUTS("function ");
17321     if (fp->uf_name[0] == K_SPECIAL)
17322     {
17323 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17324 	msg_puts(fp->uf_name + 3);
17325     }
17326     else
17327 	msg_puts(fp->uf_name);
17328     msg_putchar('(');
17329     for (j = 0; j < fp->uf_args.ga_len; ++j)
17330     {
17331 	if (j)
17332 	    MSG_PUTS(", ");
17333 	msg_puts(FUNCARG(fp, j));
17334     }
17335     if (fp->uf_varargs)
17336     {
17337 	if (j)
17338 	    MSG_PUTS(", ");
17339 	MSG_PUTS("...");
17340     }
17341     msg_putchar(')');
17342 }
17343 
17344 /*
17345  * Find a function by name, return pointer to it in ufuncs.
17346  * Return NULL for unknown function.
17347  */
17348     static ufunc_T *
17349 find_func(name)
17350     char_u	*name;
17351 {
17352     hashitem_T	*hi;
17353 
17354     hi = hash_find(&func_hashtab, name);
17355     if (!HASHITEM_EMPTY(hi))
17356 	return HI2UF(hi);
17357     return NULL;
17358 }
17359 
17360 #if defined(EXITFREE) || defined(PROTO)
17361     void
17362 free_all_functions()
17363 {
17364     hashitem_T	*hi;
17365 
17366     /* Need to start all over every time, because func_free() may change the
17367      * hash table. */
17368     while (func_hashtab.ht_used > 0)
17369 	for (hi = func_hashtab.ht_array; ; ++hi)
17370 	    if (!HASHITEM_EMPTY(hi))
17371 	    {
17372 		func_free(HI2UF(hi));
17373 		break;
17374 	    }
17375 }
17376 #endif
17377 
17378 /*
17379  * Return TRUE if a function "name" exists.
17380  */
17381     static int
17382 function_exists(name)
17383     char_u *name;
17384 {
17385     char_u  *p = name;
17386     int	    n = FALSE;
17387 
17388     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17389     if (p != NULL)
17390     {
17391 	if (builtin_function(p))
17392 	    n = (find_internal_func(p) >= 0);
17393 	else
17394 	    n = (find_func(p) != NULL);
17395 	vim_free(p);
17396     }
17397     return n;
17398 }
17399 
17400 /*
17401  * Return TRUE if "name" looks like a builtin function name: starts with a
17402  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17403  */
17404     static int
17405 builtin_function(name)
17406     char_u *name;
17407 {
17408     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17409 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17410 }
17411 
17412 #if defined(FEAT_PROFILE) || defined(PROTO)
17413 /*
17414  * Start profiling function "fp".
17415  */
17416     static void
17417 func_do_profile(fp)
17418     ufunc_T	*fp;
17419 {
17420     fp->uf_tm_count = 0;
17421     profile_zero(&fp->uf_tm_self);
17422     profile_zero(&fp->uf_tm_total);
17423     if (fp->uf_tml_count == NULL)
17424 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17425 					 (sizeof(int) * fp->uf_lines.ga_len));
17426     if (fp->uf_tml_total == NULL)
17427 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17428 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17429     if (fp->uf_tml_self == NULL)
17430 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17431 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17432     fp->uf_tml_idx = -1;
17433     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17434 						   || fp->uf_tml_self == NULL)
17435 	return;	    /* out of memory */
17436 
17437     fp->uf_profiling = TRUE;
17438 }
17439 
17440 /*
17441  * Dump the profiling results for all functions in file "fd".
17442  */
17443     void
17444 func_dump_profile(fd)
17445     FILE    *fd;
17446 {
17447     hashitem_T	*hi;
17448     int		todo;
17449     ufunc_T	*fp;
17450     int		i;
17451     ufunc_T	**sorttab;
17452     int		st_len = 0;
17453 
17454     todo = func_hashtab.ht_used;
17455     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17456 
17457     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17458     {
17459 	if (!HASHITEM_EMPTY(hi))
17460 	{
17461 	    --todo;
17462 	    fp = HI2UF(hi);
17463 	    if (fp->uf_profiling)
17464 	    {
17465 		if (sorttab != NULL)
17466 		    sorttab[st_len++] = fp;
17467 
17468 		if (fp->uf_name[0] == K_SPECIAL)
17469 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17470 		else
17471 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17472 		if (fp->uf_tm_count == 1)
17473 		    fprintf(fd, "Called 1 time\n");
17474 		else
17475 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17476 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17477 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17478 		fprintf(fd, "\n");
17479 		fprintf(fd, "count  total (s)   self (s)\n");
17480 
17481 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17482 		{
17483 		    prof_func_line(fd, fp->uf_tml_count[i],
17484 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17485 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17486 		}
17487 		fprintf(fd, "\n");
17488 	    }
17489 	}
17490     }
17491 
17492     if (sorttab != NULL && st_len > 0)
17493     {
17494 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17495 							      prof_total_cmp);
17496 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17497 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17498 							      prof_self_cmp);
17499 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17500     }
17501 }
17502 
17503     static void
17504 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17505     FILE	*fd;
17506     ufunc_T	**sorttab;
17507     int		st_len;
17508     char	*title;
17509     int		prefer_self;	/* when equal print only self time */
17510 {
17511     int		i;
17512     ufunc_T	*fp;
17513 
17514     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17515     fprintf(fd, "count  total (s)   self (s)  function\n");
17516     for (i = 0; i < 20 && i < st_len; ++i)
17517     {
17518 	fp = sorttab[i];
17519 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17520 								 prefer_self);
17521 	if (fp->uf_name[0] == K_SPECIAL)
17522 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17523 	else
17524 	    fprintf(fd, " %s()\n", fp->uf_name);
17525     }
17526     fprintf(fd, "\n");
17527 }
17528 
17529 /*
17530  * Print the count and times for one function or function line.
17531  */
17532     static void
17533 prof_func_line(fd, count, total, self, prefer_self)
17534     FILE	*fd;
17535     int		count;
17536     proftime_T	*total;
17537     proftime_T	*self;
17538     int		prefer_self;	/* when equal print only self time */
17539 {
17540     if (count > 0)
17541     {
17542 	fprintf(fd, "%5d ", count);
17543 	if (prefer_self && profile_equal(total, self))
17544 	    fprintf(fd, "           ");
17545 	else
17546 	    fprintf(fd, "%s ", profile_msg(total));
17547 	if (!prefer_self && profile_equal(total, self))
17548 	    fprintf(fd, "           ");
17549 	else
17550 	    fprintf(fd, "%s ", profile_msg(self));
17551     }
17552     else
17553 	fprintf(fd, "                            ");
17554 }
17555 
17556 /*
17557  * Compare function for total time sorting.
17558  */
17559     static int
17560 #ifdef __BORLANDC__
17561 _RTLENTRYF
17562 #endif
17563 prof_total_cmp(s1, s2)
17564     const void	*s1;
17565     const void	*s2;
17566 {
17567     ufunc_T	*p1, *p2;
17568 
17569     p1 = *(ufunc_T **)s1;
17570     p2 = *(ufunc_T **)s2;
17571     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17572 }
17573 
17574 /*
17575  * Compare function for self time sorting.
17576  */
17577     static int
17578 #ifdef __BORLANDC__
17579 _RTLENTRYF
17580 #endif
17581 prof_self_cmp(s1, s2)
17582     const void	*s1;
17583     const void	*s2;
17584 {
17585     ufunc_T	*p1, *p2;
17586 
17587     p1 = *(ufunc_T **)s1;
17588     p2 = *(ufunc_T **)s2;
17589     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17590 }
17591 
17592 #endif
17593 
17594 /* The names of packages that once were loaded is remembered. */
17595 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17596 
17597 /*
17598  * If "name" has a package name try autoloading the script for it.
17599  * Return TRUE if a package was loaded.
17600  */
17601     static int
17602 script_autoload(name, reload)
17603     char_u	*name;
17604     int		reload;	    /* load script again when already loaded */
17605 {
17606     char_u	*p;
17607     char_u	*scriptname, *tofree;
17608     int		ret = FALSE;
17609     int		i;
17610 
17611     /* If there is no '#' after name[0] there is no package name. */
17612     p = vim_strchr(name, AUTOLOAD_CHAR);
17613     if (p == NULL || p == name)
17614 	return FALSE;
17615 
17616     tofree = scriptname = autoload_name(name);
17617 
17618     /* Find the name in the list of previously loaded package names.  Skip
17619      * "autoload/", it's always the same. */
17620     for (i = 0; i < ga_loaded.ga_len; ++i)
17621 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
17622 	    break;
17623     if (!reload && i < ga_loaded.ga_len)
17624 	ret = FALSE;	    /* was loaded already */
17625     else
17626     {
17627 	/* Remember the name if it wasn't loaded already. */
17628 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
17629 	{
17630 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
17631 	    tofree = NULL;
17632 	}
17633 
17634 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
17635 	if (cmd_runtime(scriptname, FALSE) == OK)
17636 	    ret = TRUE;
17637     }
17638 
17639     vim_free(tofree);
17640     return ret;
17641 }
17642 
17643 /*
17644  * Return the autoload script name for a function or variable name.
17645  * Returns NULL when out of memory.
17646  */
17647     static char_u *
17648 autoload_name(name)
17649     char_u	*name;
17650 {
17651     char_u	*p;
17652     char_u	*scriptname;
17653 
17654     /* Get the script file name: replace '#' with '/', append ".vim". */
17655     scriptname = alloc((unsigned)(STRLEN(name) + 14));
17656     if (scriptname == NULL)
17657 	return FALSE;
17658     STRCPY(scriptname, "autoload/");
17659     STRCAT(scriptname, name);
17660     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
17661     STRCAT(scriptname, ".vim");
17662     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
17663 	*p = '/';
17664     return scriptname;
17665 }
17666 
17667 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
17668 
17669 /*
17670  * Function given to ExpandGeneric() to obtain the list of user defined
17671  * function names.
17672  */
17673     char_u *
17674 get_user_func_name(xp, idx)
17675     expand_T	*xp;
17676     int		idx;
17677 {
17678     static long_u	done;
17679     static hashitem_T	*hi;
17680     ufunc_T		*fp;
17681 
17682     if (idx == 0)
17683     {
17684 	done = 0;
17685 	hi = func_hashtab.ht_array;
17686     }
17687     if (done < func_hashtab.ht_used)
17688     {
17689 	if (done++ > 0)
17690 	    ++hi;
17691 	while (HASHITEM_EMPTY(hi))
17692 	    ++hi;
17693 	fp = HI2UF(hi);
17694 
17695 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
17696 	    return fp->uf_name;	/* prevents overflow */
17697 
17698 	cat_func_name(IObuff, fp);
17699 	if (xp->xp_context != EXPAND_USER_FUNC)
17700 	{
17701 	    STRCAT(IObuff, "(");
17702 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
17703 		STRCAT(IObuff, ")");
17704 	}
17705 	return IObuff;
17706     }
17707     return NULL;
17708 }
17709 
17710 #endif /* FEAT_CMDL_COMPL */
17711 
17712 /*
17713  * Copy the function name of "fp" to buffer "buf".
17714  * "buf" must be able to hold the function name plus three bytes.
17715  * Takes care of script-local function names.
17716  */
17717     static void
17718 cat_func_name(buf, fp)
17719     char_u	*buf;
17720     ufunc_T	*fp;
17721 {
17722     if (fp->uf_name[0] == K_SPECIAL)
17723     {
17724 	STRCPY(buf, "<SNR>");
17725 	STRCAT(buf, fp->uf_name + 3);
17726     }
17727     else
17728 	STRCPY(buf, fp->uf_name);
17729 }
17730 
17731 /*
17732  * ":delfunction {name}"
17733  */
17734     void
17735 ex_delfunction(eap)
17736     exarg_T	*eap;
17737 {
17738     ufunc_T	*fp = NULL;
17739     char_u	*p;
17740     char_u	*name;
17741     funcdict_T	fudi;
17742 
17743     p = eap->arg;
17744     name = trans_function_name(&p, eap->skip, 0, &fudi);
17745     vim_free(fudi.fd_newkey);
17746     if (name == NULL)
17747     {
17748 	if (fudi.fd_dict != NULL && !eap->skip)
17749 	    EMSG(_(e_funcref));
17750 	return;
17751     }
17752     if (!ends_excmd(*skipwhite(p)))
17753     {
17754 	vim_free(name);
17755 	EMSG(_(e_trailing));
17756 	return;
17757     }
17758     eap->nextcmd = check_nextcmd(p);
17759     if (eap->nextcmd != NULL)
17760 	*p = NUL;
17761 
17762     if (!eap->skip)
17763 	fp = find_func(name);
17764     vim_free(name);
17765 
17766     if (!eap->skip)
17767     {
17768 	if (fp == NULL)
17769 	{
17770 	    EMSG2(_(e_nofunc), eap->arg);
17771 	    return;
17772 	}
17773 	if (fp->uf_calls > 0)
17774 	{
17775 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
17776 	    return;
17777 	}
17778 
17779 	if (fudi.fd_dict != NULL)
17780 	{
17781 	    /* Delete the dict item that refers to the function, it will
17782 	     * invoke func_unref() and possibly delete the function. */
17783 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
17784 	}
17785 	else
17786 	    func_free(fp);
17787     }
17788 }
17789 
17790 /*
17791  * Free a function and remove it from the list of functions.
17792  */
17793     static void
17794 func_free(fp)
17795     ufunc_T *fp;
17796 {
17797     hashitem_T	*hi;
17798 
17799     /* clear this function */
17800     ga_clear_strings(&(fp->uf_args));
17801     ga_clear_strings(&(fp->uf_lines));
17802 #ifdef FEAT_PROFILE
17803     vim_free(fp->uf_tml_count);
17804     vim_free(fp->uf_tml_total);
17805     vim_free(fp->uf_tml_self);
17806 #endif
17807 
17808     /* remove the function from the function hashtable */
17809     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
17810     if (HASHITEM_EMPTY(hi))
17811 	EMSG2(_(e_intern2), "func_free()");
17812     else
17813 	hash_remove(&func_hashtab, hi);
17814 
17815     vim_free(fp);
17816 }
17817 
17818 /*
17819  * Unreference a Function: decrement the reference count and free it when it
17820  * becomes zero.  Only for numbered functions.
17821  */
17822     static void
17823 func_unref(name)
17824     char_u	*name;
17825 {
17826     ufunc_T *fp;
17827 
17828     if (name != NULL && isdigit(*name))
17829     {
17830 	fp = find_func(name);
17831 	if (fp == NULL)
17832 	    EMSG2(_(e_intern2), "func_unref()");
17833 	else if (--fp->uf_refcount <= 0)
17834 	{
17835 	    /* Only delete it when it's not being used.  Otherwise it's done
17836 	     * when "uf_calls" becomes zero. */
17837 	    if (fp->uf_calls == 0)
17838 		func_free(fp);
17839 	}
17840     }
17841 }
17842 
17843 /*
17844  * Count a reference to a Function.
17845  */
17846     static void
17847 func_ref(name)
17848     char_u	*name;
17849 {
17850     ufunc_T *fp;
17851 
17852     if (name != NULL && isdigit(*name))
17853     {
17854 	fp = find_func(name);
17855 	if (fp == NULL)
17856 	    EMSG2(_(e_intern2), "func_ref()");
17857 	else
17858 	    ++fp->uf_refcount;
17859     }
17860 }
17861 
17862 /*
17863  * Call a user function.
17864  */
17865     static void
17866 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
17867     ufunc_T	*fp;		/* pointer to function */
17868     int		argcount;	/* nr of args */
17869     typval_T	*argvars;	/* arguments */
17870     typval_T	*rettv;		/* return value */
17871     linenr_T	firstline;	/* first line of range */
17872     linenr_T	lastline;	/* last line of range */
17873     dict_T	*selfdict;	/* Dictionary for "self" */
17874 {
17875     char_u	*save_sourcing_name;
17876     linenr_T	save_sourcing_lnum;
17877     scid_T	save_current_SID;
17878     funccall_T	fc;
17879     int		save_did_emsg;
17880     static int	depth = 0;
17881     dictitem_T	*v;
17882     int		fixvar_idx = 0;	/* index in fixvar[] */
17883     int		i;
17884     int		ai;
17885     char_u	numbuf[NUMBUFLEN];
17886     char_u	*name;
17887 #ifdef FEAT_PROFILE
17888     proftime_T	wait_start;
17889 #endif
17890 
17891     /* If depth of calling is getting too high, don't execute the function */
17892     if (depth >= p_mfd)
17893     {
17894 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
17895 	rettv->v_type = VAR_NUMBER;
17896 	rettv->vval.v_number = -1;
17897 	return;
17898     }
17899     ++depth;
17900 
17901     line_breakcheck();		/* check for CTRL-C hit */
17902 
17903     fc.caller = current_funccal;
17904     current_funccal = &fc;
17905     fc.func = fp;
17906     fc.rettv = rettv;
17907     rettv->vval.v_number = 0;
17908     fc.linenr = 0;
17909     fc.returned = FALSE;
17910     fc.level = ex_nesting_level;
17911     /* Check if this function has a breakpoint. */
17912     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
17913     fc.dbg_tick = debug_tick;
17914 
17915     /*
17916      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
17917      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
17918      * each argument variable and saves a lot of time.
17919      */
17920     /*
17921      * Init l: variables.
17922      */
17923     init_var_dict(&fc.l_vars, &fc.l_vars_var);
17924     if (selfdict != NULL)
17925     {
17926 	/* Set l:self to "selfdict". */
17927 	v = &fc.fixvar[fixvar_idx++].var;
17928 	STRCPY(v->di_key, "self");
17929 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
17930 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
17931 	v->di_tv.v_type = VAR_DICT;
17932 	v->di_tv.v_lock = 0;
17933 	v->di_tv.vval.v_dict = selfdict;
17934 	++selfdict->dv_refcount;
17935     }
17936 
17937     /*
17938      * Init a: variables.
17939      * Set a:0 to "argcount".
17940      * Set a:000 to a list with room for the "..." arguments.
17941      */
17942     init_var_dict(&fc.l_avars, &fc.l_avars_var);
17943     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
17944 				(varnumber_T)(argcount - fp->uf_args.ga_len));
17945     v = &fc.fixvar[fixvar_idx++].var;
17946     STRCPY(v->di_key, "000");
17947     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
17948     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
17949     v->di_tv.v_type = VAR_LIST;
17950     v->di_tv.v_lock = VAR_FIXED;
17951     v->di_tv.vval.v_list = &fc.l_varlist;
17952     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
17953     fc.l_varlist.lv_refcount = 99999;
17954 
17955     /*
17956      * Set a:firstline to "firstline" and a:lastline to "lastline".
17957      * Set a:name to named arguments.
17958      * Set a:N to the "..." arguments.
17959      */
17960     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
17961 						      (varnumber_T)firstline);
17962     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
17963 						       (varnumber_T)lastline);
17964     for (i = 0; i < argcount; ++i)
17965     {
17966 	ai = i - fp->uf_args.ga_len;
17967 	if (ai < 0)
17968 	    /* named argument a:name */
17969 	    name = FUNCARG(fp, i);
17970 	else
17971 	{
17972 	    /* "..." argument a:1, a:2, etc. */
17973 	    sprintf((char *)numbuf, "%d", ai + 1);
17974 	    name = numbuf;
17975 	}
17976 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
17977 	{
17978 	    v = &fc.fixvar[fixvar_idx++].var;
17979 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
17980 	}
17981 	else
17982 	{
17983 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
17984 							     + STRLEN(name)));
17985 	    if (v == NULL)
17986 		break;
17987 	    v->di_flags = DI_FLAGS_RO;
17988 	}
17989 	STRCPY(v->di_key, name);
17990 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
17991 
17992 	/* Note: the values are copied directly to avoid alloc/free.
17993 	 * "argvars" must have VAR_FIXED for v_lock. */
17994 	v->di_tv = argvars[i];
17995 	v->di_tv.v_lock = VAR_FIXED;
17996 
17997 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
17998 	{
17999 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18000 	    fc.l_listitems[ai].li_tv = argvars[i];
18001 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18002 	}
18003     }
18004 
18005     /* Don't redraw while executing the function. */
18006     ++RedrawingDisabled;
18007     save_sourcing_name = sourcing_name;
18008     save_sourcing_lnum = sourcing_lnum;
18009     sourcing_lnum = 1;
18010     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18011 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18012     if (sourcing_name != NULL)
18013     {
18014 	if (save_sourcing_name != NULL
18015 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18016 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18017 	else
18018 	    STRCPY(sourcing_name, "function ");
18019 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18020 
18021 	if (p_verbose >= 12)
18022 	{
18023 	    ++no_wait_return;
18024 	    verbose_enter_scroll();
18025 
18026 	    smsg((char_u *)_("calling %s"), sourcing_name);
18027 	    if (p_verbose >= 14)
18028 	    {
18029 		char_u	buf[MSG_BUF_LEN];
18030 		char_u	numbuf[NUMBUFLEN];
18031 		char_u	*tofree;
18032 
18033 		msg_puts((char_u *)"(");
18034 		for (i = 0; i < argcount; ++i)
18035 		{
18036 		    if (i > 0)
18037 			msg_puts((char_u *)", ");
18038 		    if (argvars[i].v_type == VAR_NUMBER)
18039 			msg_outnum((long)argvars[i].vval.v_number);
18040 		    else
18041 		    {
18042 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18043 							    buf, MSG_BUF_CLEN);
18044 			msg_puts(buf);
18045 			vim_free(tofree);
18046 		    }
18047 		}
18048 		msg_puts((char_u *)")");
18049 	    }
18050 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18051 
18052 	    verbose_leave_scroll();
18053 	    --no_wait_return;
18054 	}
18055     }
18056 #ifdef FEAT_PROFILE
18057     if (do_profiling)
18058     {
18059 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18060 	    func_do_profile(fp);
18061 	if (fp->uf_profiling
18062 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18063 	{
18064 	    ++fp->uf_tm_count;
18065 	    profile_start(&fp->uf_tm_start);
18066 	    profile_zero(&fp->uf_tm_children);
18067 	}
18068 	script_prof_save(&wait_start);
18069     }
18070 #endif
18071 
18072     save_current_SID = current_SID;
18073     current_SID = fp->uf_script_ID;
18074     save_did_emsg = did_emsg;
18075     did_emsg = FALSE;
18076 
18077     /* call do_cmdline() to execute the lines */
18078     do_cmdline(NULL, get_func_line, (void *)&fc,
18079 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18080 
18081     --RedrawingDisabled;
18082 
18083     /* when the function was aborted because of an error, return -1 */
18084     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18085     {
18086 	clear_tv(rettv);
18087 	rettv->v_type = VAR_NUMBER;
18088 	rettv->vval.v_number = -1;
18089     }
18090 
18091 #ifdef FEAT_PROFILE
18092     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18093     {
18094 	profile_end(&fp->uf_tm_start);
18095 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18096 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18097 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18098 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18099 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18100 	{
18101 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18102 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18103 	}
18104     }
18105 #endif
18106 
18107     /* when being verbose, mention the return value */
18108     if (p_verbose >= 12)
18109     {
18110 	++no_wait_return;
18111 	verbose_enter_scroll();
18112 
18113 	if (aborting())
18114 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18115 	else if (fc.rettv->v_type == VAR_NUMBER)
18116 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18117 					       (long)fc.rettv->vval.v_number);
18118 	else
18119 	{
18120 	    char_u	buf[MSG_BUF_LEN];
18121 	    char_u	numbuf[NUMBUFLEN];
18122 	    char_u	*tofree;
18123 
18124 	    /* The value may be very long.  Skip the middle part, so that we
18125 	     * have some idea how it starts and ends. smsg() would always
18126 	     * truncate it at the end. */
18127 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18128 							   buf, MSG_BUF_CLEN);
18129 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18130 	    vim_free(tofree);
18131 	}
18132 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18133 
18134 	verbose_leave_scroll();
18135 	--no_wait_return;
18136     }
18137 
18138     vim_free(sourcing_name);
18139     sourcing_name = save_sourcing_name;
18140     sourcing_lnum = save_sourcing_lnum;
18141     current_SID = save_current_SID;
18142 #ifdef FEAT_PROFILE
18143     if (do_profiling)
18144 	script_prof_restore(&wait_start);
18145 #endif
18146 
18147     if (p_verbose >= 12 && sourcing_name != NULL)
18148     {
18149 	++no_wait_return;
18150 	verbose_enter_scroll();
18151 
18152 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18153 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18154 
18155 	verbose_leave_scroll();
18156 	--no_wait_return;
18157     }
18158 
18159     did_emsg |= save_did_emsg;
18160     current_funccal = fc.caller;
18161 
18162     /* The a: variables typevals were not alloced, only free the allocated
18163      * variables. */
18164     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18165 
18166     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18167     --depth;
18168 }
18169 
18170 /*
18171  * Add a number variable "name" to dict "dp" with value "nr".
18172  */
18173     static void
18174 add_nr_var(dp, v, name, nr)
18175     dict_T	*dp;
18176     dictitem_T	*v;
18177     char	*name;
18178     varnumber_T nr;
18179 {
18180     STRCPY(v->di_key, name);
18181     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18182     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18183     v->di_tv.v_type = VAR_NUMBER;
18184     v->di_tv.v_lock = VAR_FIXED;
18185     v->di_tv.vval.v_number = nr;
18186 }
18187 
18188 /*
18189  * ":return [expr]"
18190  */
18191     void
18192 ex_return(eap)
18193     exarg_T	*eap;
18194 {
18195     char_u	*arg = eap->arg;
18196     typval_T	rettv;
18197     int		returning = FALSE;
18198 
18199     if (current_funccal == NULL)
18200     {
18201 	EMSG(_("E133: :return not inside a function"));
18202 	return;
18203     }
18204 
18205     if (eap->skip)
18206 	++emsg_skip;
18207 
18208     eap->nextcmd = NULL;
18209     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18210 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18211     {
18212 	if (!eap->skip)
18213 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18214 	else
18215 	    clear_tv(&rettv);
18216     }
18217     /* It's safer to return also on error. */
18218     else if (!eap->skip)
18219     {
18220 	/*
18221 	 * Return unless the expression evaluation has been cancelled due to an
18222 	 * aborting error, an interrupt, or an exception.
18223 	 */
18224 	if (!aborting())
18225 	    returning = do_return(eap, FALSE, TRUE, NULL);
18226     }
18227 
18228     /* When skipping or the return gets pending, advance to the next command
18229      * in this line (!returning).  Otherwise, ignore the rest of the line.
18230      * Following lines will be ignored by get_func_line(). */
18231     if (returning)
18232 	eap->nextcmd = NULL;
18233     else if (eap->nextcmd == NULL)	    /* no argument */
18234 	eap->nextcmd = check_nextcmd(arg);
18235 
18236     if (eap->skip)
18237 	--emsg_skip;
18238 }
18239 
18240 /*
18241  * Return from a function.  Possibly makes the return pending.  Also called
18242  * for a pending return at the ":endtry" or after returning from an extra
18243  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18244  * when called due to a ":return" command.  "rettv" may point to a typval_T
18245  * with the return rettv.  Returns TRUE when the return can be carried out,
18246  * FALSE when the return gets pending.
18247  */
18248     int
18249 do_return(eap, reanimate, is_cmd, rettv)
18250     exarg_T	*eap;
18251     int		reanimate;
18252     int		is_cmd;
18253     void	*rettv;
18254 {
18255     int		idx;
18256     struct condstack *cstack = eap->cstack;
18257 
18258     if (reanimate)
18259 	/* Undo the return. */
18260 	current_funccal->returned = FALSE;
18261 
18262     /*
18263      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18264      * not in its finally clause (which then is to be executed next) is found.
18265      * In this case, make the ":return" pending for execution at the ":endtry".
18266      * Otherwise, return normally.
18267      */
18268     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18269     if (idx >= 0)
18270     {
18271 	cstack->cs_pending[idx] = CSTP_RETURN;
18272 
18273 	if (!is_cmd && !reanimate)
18274 	    /* A pending return again gets pending.  "rettv" points to an
18275 	     * allocated variable with the rettv of the original ":return"'s
18276 	     * argument if present or is NULL else. */
18277 	    cstack->cs_rettv[idx] = rettv;
18278 	else
18279 	{
18280 	    /* When undoing a return in order to make it pending, get the stored
18281 	     * return rettv. */
18282 	    if (reanimate)
18283 		rettv = current_funccal->rettv;
18284 
18285 	    if (rettv != NULL)
18286 	    {
18287 		/* Store the value of the pending return. */
18288 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18289 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18290 		else
18291 		    EMSG(_(e_outofmem));
18292 	    }
18293 	    else
18294 		cstack->cs_rettv[idx] = NULL;
18295 
18296 	    if (reanimate)
18297 	    {
18298 		/* The pending return value could be overwritten by a ":return"
18299 		 * without argument in a finally clause; reset the default
18300 		 * return value. */
18301 		current_funccal->rettv->v_type = VAR_NUMBER;
18302 		current_funccal->rettv->vval.v_number = 0;
18303 	    }
18304 	}
18305 	report_make_pending(CSTP_RETURN, rettv);
18306     }
18307     else
18308     {
18309 	current_funccal->returned = TRUE;
18310 
18311 	/* If the return is carried out now, store the return value.  For
18312 	 * a return immediately after reanimation, the value is already
18313 	 * there. */
18314 	if (!reanimate && rettv != NULL)
18315 	{
18316 	    clear_tv(current_funccal->rettv);
18317 	    *current_funccal->rettv = *(typval_T *)rettv;
18318 	    if (!is_cmd)
18319 		vim_free(rettv);
18320 	}
18321     }
18322 
18323     return idx < 0;
18324 }
18325 
18326 /*
18327  * Free the variable with a pending return value.
18328  */
18329     void
18330 discard_pending_return(rettv)
18331     void	*rettv;
18332 {
18333     free_tv((typval_T *)rettv);
18334 }
18335 
18336 /*
18337  * Generate a return command for producing the value of "rettv".  The result
18338  * is an allocated string.  Used by report_pending() for verbose messages.
18339  */
18340     char_u *
18341 get_return_cmd(rettv)
18342     void	*rettv;
18343 {
18344     char_u	*s = NULL;
18345     char_u	*tofree = NULL;
18346     char_u	numbuf[NUMBUFLEN];
18347 
18348     if (rettv != NULL)
18349 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18350     if (s == NULL)
18351 	s = (char_u *)"";
18352 
18353     STRCPY(IObuff, ":return ");
18354     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18355     if (STRLEN(s) + 8 >= IOSIZE)
18356 	STRCPY(IObuff + IOSIZE - 4, "...");
18357     vim_free(tofree);
18358     return vim_strsave(IObuff);
18359 }
18360 
18361 /*
18362  * Get next function line.
18363  * Called by do_cmdline() to get the next line.
18364  * Returns allocated string, or NULL for end of function.
18365  */
18366 /* ARGSUSED */
18367     char_u *
18368 get_func_line(c, cookie, indent)
18369     int	    c;		    /* not used */
18370     void    *cookie;
18371     int	    indent;	    /* not used */
18372 {
18373     funccall_T	*fcp = (funccall_T *)cookie;
18374     ufunc_T	*fp = fcp->func;
18375     char_u	*retval;
18376     garray_T	*gap;  /* growarray with function lines */
18377 
18378     /* If breakpoints have been added/deleted need to check for it. */
18379     if (fcp->dbg_tick != debug_tick)
18380     {
18381 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18382 							       sourcing_lnum);
18383 	fcp->dbg_tick = debug_tick;
18384     }
18385 #ifdef FEAT_PROFILE
18386     if (do_profiling)
18387 	func_line_end(cookie);
18388 #endif
18389 
18390     gap = &fp->uf_lines;
18391     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18392 	retval = NULL;
18393     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18394 	retval = NULL;
18395     else
18396     {
18397 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18398 	sourcing_lnum = fcp->linenr;
18399 #ifdef FEAT_PROFILE
18400 	if (do_profiling)
18401 	    func_line_start(cookie);
18402 #endif
18403     }
18404 
18405     /* Did we encounter a breakpoint? */
18406     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18407     {
18408 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18409 	/* Find next breakpoint. */
18410 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18411 							       sourcing_lnum);
18412 	fcp->dbg_tick = debug_tick;
18413     }
18414 
18415     return retval;
18416 }
18417 
18418 #if defined(FEAT_PROFILE) || defined(PROTO)
18419 /*
18420  * Called when starting to read a function line.
18421  * "sourcing_lnum" must be correct!
18422  * When skipping lines it may not actually be executed, but we won't find out
18423  * until later and we need to store the time now.
18424  */
18425     void
18426 func_line_start(cookie)
18427     void    *cookie;
18428 {
18429     funccall_T	*fcp = (funccall_T *)cookie;
18430     ufunc_T	*fp = fcp->func;
18431 
18432     if (fp->uf_profiling && sourcing_lnum >= 1
18433 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18434     {
18435 	fp->uf_tml_idx = sourcing_lnum - 1;
18436 	fp->uf_tml_execed = FALSE;
18437 	profile_start(&fp->uf_tml_start);
18438 	profile_zero(&fp->uf_tml_children);
18439 	profile_get_wait(&fp->uf_tml_wait);
18440     }
18441 }
18442 
18443 /*
18444  * Called when actually executing a function line.
18445  */
18446     void
18447 func_line_exec(cookie)
18448     void    *cookie;
18449 {
18450     funccall_T	*fcp = (funccall_T *)cookie;
18451     ufunc_T	*fp = fcp->func;
18452 
18453     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18454 	fp->uf_tml_execed = TRUE;
18455 }
18456 
18457 /*
18458  * Called when done with a function line.
18459  */
18460     void
18461 func_line_end(cookie)
18462     void    *cookie;
18463 {
18464     funccall_T	*fcp = (funccall_T *)cookie;
18465     ufunc_T	*fp = fcp->func;
18466 
18467     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18468     {
18469 	if (fp->uf_tml_execed)
18470 	{
18471 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18472 	    profile_end(&fp->uf_tml_start);
18473 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18474 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18475 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18476 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18477 	}
18478 	fp->uf_tml_idx = -1;
18479     }
18480 }
18481 #endif
18482 
18483 /*
18484  * Return TRUE if the currently active function should be ended, because a
18485  * return was encountered or an error occured.  Used inside a ":while".
18486  */
18487     int
18488 func_has_ended(cookie)
18489     void    *cookie;
18490 {
18491     funccall_T  *fcp = (funccall_T *)cookie;
18492 
18493     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18494      * an error inside a try conditional. */
18495     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18496 	    || fcp->returned);
18497 }
18498 
18499 /*
18500  * return TRUE if cookie indicates a function which "abort"s on errors.
18501  */
18502     int
18503 func_has_abort(cookie)
18504     void    *cookie;
18505 {
18506     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18507 }
18508 
18509 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18510 typedef enum
18511 {
18512     VAR_FLAVOUR_DEFAULT,
18513     VAR_FLAVOUR_SESSION,
18514     VAR_FLAVOUR_VIMINFO
18515 } var_flavour_T;
18516 
18517 static var_flavour_T var_flavour __ARGS((char_u *varname));
18518 
18519     static var_flavour_T
18520 var_flavour(varname)
18521     char_u *varname;
18522 {
18523     char_u *p = varname;
18524 
18525     if (ASCII_ISUPPER(*p))
18526     {
18527 	while (*(++p))
18528 	    if (ASCII_ISLOWER(*p))
18529 		return VAR_FLAVOUR_SESSION;
18530 	return VAR_FLAVOUR_VIMINFO;
18531     }
18532     else
18533 	return VAR_FLAVOUR_DEFAULT;
18534 }
18535 #endif
18536 
18537 #if defined(FEAT_VIMINFO) || defined(PROTO)
18538 /*
18539  * Restore global vars that start with a capital from the viminfo file
18540  */
18541     int
18542 read_viminfo_varlist(virp, writing)
18543     vir_T	*virp;
18544     int		writing;
18545 {
18546     char_u	*tab;
18547     int		is_string = FALSE;
18548     typval_T	tv;
18549 
18550     if (!writing && (find_viminfo_parameter('!') != NULL))
18551     {
18552 	tab = vim_strchr(virp->vir_line + 1, '\t');
18553 	if (tab != NULL)
18554 	{
18555 	    *tab++ = '\0';	/* isolate the variable name */
18556 	    if (*tab == 'S')	/* string var */
18557 		is_string = TRUE;
18558 
18559 	    tab = vim_strchr(tab, '\t');
18560 	    if (tab != NULL)
18561 	    {
18562 		if (is_string)
18563 		{
18564 		    tv.v_type = VAR_STRING;
18565 		    tv.vval.v_string = viminfo_readstring(virp,
18566 				       (int)(tab - virp->vir_line + 1), TRUE);
18567 		}
18568 		else
18569 		{
18570 		    tv.v_type = VAR_NUMBER;
18571 		    tv.vval.v_number = atol((char *)tab + 1);
18572 		}
18573 		set_var(virp->vir_line + 1, &tv, FALSE);
18574 		if (is_string)
18575 		    vim_free(tv.vval.v_string);
18576 	    }
18577 	}
18578     }
18579 
18580     return viminfo_readline(virp);
18581 }
18582 
18583 /*
18584  * Write global vars that start with a capital to the viminfo file
18585  */
18586     void
18587 write_viminfo_varlist(fp)
18588     FILE    *fp;
18589 {
18590     hashitem_T	*hi;
18591     dictitem_T	*this_var;
18592     int		todo;
18593     char	*s;
18594     char_u	*p;
18595     char_u	*tofree;
18596     char_u	numbuf[NUMBUFLEN];
18597 
18598     if (find_viminfo_parameter('!') == NULL)
18599 	return;
18600 
18601     fprintf(fp, _("\n# global variables:\n"));
18602 
18603     todo = globvarht.ht_used;
18604     for (hi = globvarht.ht_array; todo > 0; ++hi)
18605     {
18606 	if (!HASHITEM_EMPTY(hi))
18607 	{
18608 	    --todo;
18609 	    this_var = HI2DI(hi);
18610 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18611 	    {
18612 		switch (this_var->di_tv.v_type)
18613 		{
18614 		    case VAR_STRING: s = "STR"; break;
18615 		    case VAR_NUMBER: s = "NUM"; break;
18616 		    default: continue;
18617 		}
18618 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
18619 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
18620 		if (p != NULL)
18621 		    viminfo_writestring(fp, p);
18622 		vim_free(tofree);
18623 	    }
18624 	}
18625     }
18626 }
18627 #endif
18628 
18629 #if defined(FEAT_SESSION) || defined(PROTO)
18630     int
18631 store_session_globals(fd)
18632     FILE	*fd;
18633 {
18634     hashitem_T	*hi;
18635     dictitem_T	*this_var;
18636     int		todo;
18637     char_u	*p, *t;
18638 
18639     todo = globvarht.ht_used;
18640     for (hi = globvarht.ht_array; todo > 0; ++hi)
18641     {
18642 	if (!HASHITEM_EMPTY(hi))
18643 	{
18644 	    --todo;
18645 	    this_var = HI2DI(hi);
18646 	    if ((this_var->di_tv.v_type == VAR_NUMBER
18647 			|| this_var->di_tv.v_type == VAR_STRING)
18648 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
18649 	    {
18650 		/* Escape special characters with a backslash.  Turn a LF and
18651 		 * CR into \n and \r. */
18652 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
18653 							(char_u *)"\\\"\n\r");
18654 		if (p == NULL)	    /* out of memory */
18655 		    break;
18656 		for (t = p; *t != NUL; ++t)
18657 		    if (*t == '\n')
18658 			*t = 'n';
18659 		    else if (*t == '\r')
18660 			*t = 'r';
18661 		if ((fprintf(fd, "let %s = %c%s%c",
18662 				this_var->di_key,
18663 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18664 									: ' ',
18665 				p,
18666 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
18667 								   : ' ') < 0)
18668 			|| put_eol(fd) == FAIL)
18669 		{
18670 		    vim_free(p);
18671 		    return FAIL;
18672 		}
18673 		vim_free(p);
18674 	    }
18675 	}
18676     }
18677     return OK;
18678 }
18679 #endif
18680 
18681 #endif /* FEAT_EVAL */
18682 
18683 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
18684 
18685 
18686 #ifdef WIN3264
18687 /*
18688  * Functions for ":8" filename modifier: get 8.3 version of a filename.
18689  */
18690 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18691 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
18692 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
18693 
18694 /*
18695  * Get the short pathname of a file.
18696  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
18697  */
18698     static int
18699 get_short_pathname(fnamep, bufp, fnamelen)
18700     char_u	**fnamep;
18701     char_u	**bufp;
18702     int		*fnamelen;
18703 {
18704     int		l,len;
18705     char_u	*newbuf;
18706 
18707     len = *fnamelen;
18708 
18709     l = GetShortPathName(*fnamep, *fnamep, len);
18710     if (l > len - 1)
18711     {
18712 	/* If that doesn't work (not enough space), then save the string
18713 	 * and try again with a new buffer big enough
18714 	 */
18715 	newbuf = vim_strnsave(*fnamep, l);
18716 	if (newbuf == NULL)
18717 	    return 0;
18718 
18719 	vim_free(*bufp);
18720 	*fnamep = *bufp = newbuf;
18721 
18722 	l = GetShortPathName(*fnamep,*fnamep,l+1);
18723 
18724 	/* Really should always succeed, as the buffer is big enough */
18725     }
18726 
18727     *fnamelen = l;
18728     return 1;
18729 }
18730 
18731 /*
18732  * Create a short path name.  Returns the length of the buffer it needs.
18733  * Doesn't copy over the end of the buffer passed in.
18734  */
18735     static int
18736 shortpath_for_invalid_fname(fname, bufp, fnamelen)
18737     char_u	**fname;
18738     char_u	**bufp;
18739     int		*fnamelen;
18740 {
18741     char_u	*s, *p, *pbuf2, *pbuf3;
18742     char_u	ch;
18743     int		len, len2, plen, slen;
18744 
18745     /* Make a copy */
18746     len2 = *fnamelen;
18747     pbuf2 = vim_strnsave(*fname, len2);
18748     pbuf3 = NULL;
18749 
18750     s = pbuf2 + len2 - 1; /* Find the end */
18751     slen = 1;
18752     plen = len2;
18753 
18754     if (after_pathsep(pbuf2, s + 1))
18755     {
18756 	--s;
18757 	++slen;
18758 	--plen;
18759     }
18760 
18761     do
18762     {
18763 	/* Go back one path-seperator */
18764 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
18765 	{
18766 	    --s;
18767 	    ++slen;
18768 	    --plen;
18769 	}
18770 	if (s <= pbuf2)
18771 	    break;
18772 
18773 	/* Remeber the character that is about to be blatted */
18774 	ch = *s;
18775 	*s = 0; /* get_short_pathname requires a null-terminated string */
18776 
18777 	/* Try it in situ */
18778 	p = pbuf2;
18779 	if (!get_short_pathname(&p, &pbuf3, &plen))
18780 	{
18781 	    vim_free(pbuf2);
18782 	    return -1;
18783 	}
18784 	*s = ch;    /* Preserve the string */
18785     } while (plen == 0);
18786 
18787     if (plen > 0)
18788     {
18789 	/* Remeber the length of the new string.  */
18790 	*fnamelen = len = plen + slen;
18791 	vim_free(*bufp);
18792 	if (len > len2)
18793 	{
18794 	    /* If there's not enough space in the currently allocated string,
18795 	     * then copy it to a buffer big enough.
18796 	     */
18797 	    *fname= *bufp = vim_strnsave(p, len);
18798 	    if (*fname == NULL)
18799 		return -1;
18800 	}
18801 	else
18802 	{
18803 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
18804 	    *fname = *bufp = pbuf2;
18805 	    if (p != pbuf2)
18806 		strncpy(*fname, p, plen);
18807 	    pbuf2 = NULL;
18808 	}
18809 	/* Concat the next bit */
18810 	strncpy(*fname + plen, s, slen);
18811 	(*fname)[len] = '\0';
18812     }
18813     vim_free(pbuf3);
18814     vim_free(pbuf2);
18815     return 0;
18816 }
18817 
18818 /*
18819  * Get a pathname for a partial path.
18820  */
18821     static int
18822 shortpath_for_partial(fnamep, bufp, fnamelen)
18823     char_u	**fnamep;
18824     char_u	**bufp;
18825     int		*fnamelen;
18826 {
18827     int		sepcount, len, tflen;
18828     char_u	*p;
18829     char_u	*pbuf, *tfname;
18830     int		hasTilde;
18831 
18832     /* Count up the path seperators from the RHS.. so we know which part
18833      * of the path to return.
18834      */
18835     sepcount = 0;
18836     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
18837 	if (vim_ispathsep(*p))
18838 	    ++sepcount;
18839 
18840     /* Need full path first (use expand_env() to remove a "~/") */
18841     hasTilde = (**fnamep == '~');
18842     if (hasTilde)
18843 	pbuf = tfname = expand_env_save(*fnamep);
18844     else
18845 	pbuf = tfname = FullName_save(*fnamep, FALSE);
18846 
18847     len = tflen = STRLEN(tfname);
18848 
18849     if (!get_short_pathname(&tfname, &pbuf, &len))
18850 	return -1;
18851 
18852     if (len == 0)
18853     {
18854 	/* Don't have a valid filename, so shorten the rest of the
18855 	 * path if we can. This CAN give us invalid 8.3 filenames, but
18856 	 * there's not a lot of point in guessing what it might be.
18857 	 */
18858 	len = tflen;
18859 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
18860 	    return -1;
18861     }
18862 
18863     /* Count the paths backward to find the beginning of the desired string. */
18864     for (p = tfname + len - 1; p >= tfname; --p)
18865     {
18866 #ifdef FEAT_MBYTE
18867 	if (has_mbyte)
18868 	    p -= mb_head_off(tfname, p);
18869 #endif
18870 	if (vim_ispathsep(*p))
18871 	{
18872 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
18873 		break;
18874 	    else
18875 		sepcount --;
18876 	}
18877     }
18878     if (hasTilde)
18879     {
18880 	--p;
18881 	if (p >= tfname)
18882 	    *p = '~';
18883 	else
18884 	    return -1;
18885     }
18886     else
18887 	++p;
18888 
18889     /* Copy in the string - p indexes into tfname - allocated at pbuf */
18890     vim_free(*bufp);
18891     *fnamelen = (int)STRLEN(p);
18892     *bufp = pbuf;
18893     *fnamep = p;
18894 
18895     return 0;
18896 }
18897 #endif /* WIN3264 */
18898 
18899 /*
18900  * Adjust a filename, according to a string of modifiers.
18901  * *fnamep must be NUL terminated when called.  When returning, the length is
18902  * determined by *fnamelen.
18903  * Returns valid flags.
18904  * When there is an error, *fnamep is set to NULL.
18905  */
18906     int
18907 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
18908     char_u	*src;		/* string with modifiers */
18909     int		*usedlen;	/* characters after src that are used */
18910     char_u	**fnamep;	/* file name so far */
18911     char_u	**bufp;		/* buffer for allocated file name or NULL */
18912     int		*fnamelen;	/* length of fnamep */
18913 {
18914     int		valid = 0;
18915     char_u	*tail;
18916     char_u	*s, *p, *pbuf;
18917     char_u	dirname[MAXPATHL];
18918     int		c;
18919     int		has_fullname = 0;
18920 #ifdef WIN3264
18921     int		has_shortname = 0;
18922 #endif
18923 
18924 repeat:
18925     /* ":p" - full path/file_name */
18926     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
18927     {
18928 	has_fullname = 1;
18929 
18930 	valid |= VALID_PATH;
18931 	*usedlen += 2;
18932 
18933 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
18934 	if ((*fnamep)[0] == '~'
18935 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
18936 		&& ((*fnamep)[1] == '/'
18937 # ifdef BACKSLASH_IN_FILENAME
18938 		    || (*fnamep)[1] == '\\'
18939 # endif
18940 		    || (*fnamep)[1] == NUL)
18941 
18942 #endif
18943 	   )
18944 	{
18945 	    *fnamep = expand_env_save(*fnamep);
18946 	    vim_free(*bufp);	/* free any allocated file name */
18947 	    *bufp = *fnamep;
18948 	    if (*fnamep == NULL)
18949 		return -1;
18950 	}
18951 
18952 	/* When "/." or "/.." is used: force expansion to get rid of it. */
18953 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
18954 	{
18955 	    if (vim_ispathsep(*p)
18956 		    && p[1] == '.'
18957 		    && (p[2] == NUL
18958 			|| vim_ispathsep(p[2])
18959 			|| (p[2] == '.'
18960 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
18961 		break;
18962 	}
18963 
18964 	/* FullName_save() is slow, don't use it when not needed. */
18965 	if (*p != NUL || !vim_isAbsName(*fnamep))
18966 	{
18967 	    *fnamep = FullName_save(*fnamep, *p != NUL);
18968 	    vim_free(*bufp);	/* free any allocated file name */
18969 	    *bufp = *fnamep;
18970 	    if (*fnamep == NULL)
18971 		return -1;
18972 	}
18973 
18974 	/* Append a path separator to a directory. */
18975 	if (mch_isdir(*fnamep))
18976 	{
18977 	    /* Make room for one or two extra characters. */
18978 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
18979 	    vim_free(*bufp);	/* free any allocated file name */
18980 	    *bufp = *fnamep;
18981 	    if (*fnamep == NULL)
18982 		return -1;
18983 	    add_pathsep(*fnamep);
18984 	}
18985     }
18986 
18987     /* ":." - path relative to the current directory */
18988     /* ":~" - path relative to the home directory */
18989     /* ":8" - shortname path - postponed till after */
18990     while (src[*usedlen] == ':'
18991 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
18992     {
18993 	*usedlen += 2;
18994 	if (c == '8')
18995 	{
18996 #ifdef WIN3264
18997 	    has_shortname = 1; /* Postpone this. */
18998 #endif
18999 	    continue;
19000 	}
19001 	pbuf = NULL;
19002 	/* Need full path first (use expand_env() to remove a "~/") */
19003 	if (!has_fullname)
19004 	{
19005 	    if (c == '.' && **fnamep == '~')
19006 		p = pbuf = expand_env_save(*fnamep);
19007 	    else
19008 		p = pbuf = FullName_save(*fnamep, FALSE);
19009 	}
19010 	else
19011 	    p = *fnamep;
19012 
19013 	has_fullname = 0;
19014 
19015 	if (p != NULL)
19016 	{
19017 	    if (c == '.')
19018 	    {
19019 		mch_dirname(dirname, MAXPATHL);
19020 		s = shorten_fname(p, dirname);
19021 		if (s != NULL)
19022 		{
19023 		    *fnamep = s;
19024 		    if (pbuf != NULL)
19025 		    {
19026 			vim_free(*bufp);   /* free any allocated file name */
19027 			*bufp = pbuf;
19028 			pbuf = NULL;
19029 		    }
19030 		}
19031 	    }
19032 	    else
19033 	    {
19034 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19035 		/* Only replace it when it starts with '~' */
19036 		if (*dirname == '~')
19037 		{
19038 		    s = vim_strsave(dirname);
19039 		    if (s != NULL)
19040 		    {
19041 			*fnamep = s;
19042 			vim_free(*bufp);
19043 			*bufp = s;
19044 		    }
19045 		}
19046 	    }
19047 	    vim_free(pbuf);
19048 	}
19049     }
19050 
19051     tail = gettail(*fnamep);
19052     *fnamelen = (int)STRLEN(*fnamep);
19053 
19054     /* ":h" - head, remove "/file_name", can be repeated  */
19055     /* Don't remove the first "/" or "c:\" */
19056     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19057     {
19058 	valid |= VALID_HEAD;
19059 	*usedlen += 2;
19060 	s = get_past_head(*fnamep);
19061 	while (tail > s && after_pathsep(s, tail))
19062 	    --tail;
19063 	*fnamelen = (int)(tail - *fnamep);
19064 #ifdef VMS
19065 	if (*fnamelen > 0)
19066 	    *fnamelen += 1; /* the path separator is part of the path */
19067 #endif
19068 	while (tail > s && !after_pathsep(s, tail))
19069 	    mb_ptr_back(*fnamep, tail);
19070     }
19071 
19072     /* ":8" - shortname  */
19073     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19074     {
19075 	*usedlen += 2;
19076 #ifdef WIN3264
19077 	has_shortname = 1;
19078 #endif
19079     }
19080 
19081 #ifdef WIN3264
19082     /* Check shortname after we have done 'heads' and before we do 'tails'
19083      */
19084     if (has_shortname)
19085     {
19086 	pbuf = NULL;
19087 	/* Copy the string if it is shortened by :h */
19088 	if (*fnamelen < (int)STRLEN(*fnamep))
19089 	{
19090 	    p = vim_strnsave(*fnamep, *fnamelen);
19091 	    if (p == 0)
19092 		return -1;
19093 	    vim_free(*bufp);
19094 	    *bufp = *fnamep = p;
19095 	}
19096 
19097 	/* Split into two implementations - makes it easier.  First is where
19098 	 * there isn't a full name already, second is where there is.
19099 	 */
19100 	if (!has_fullname && !vim_isAbsName(*fnamep))
19101 	{
19102 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19103 		return -1;
19104 	}
19105 	else
19106 	{
19107 	    int		l;
19108 
19109 	    /* Simple case, already have the full-name
19110 	     * Nearly always shorter, so try first time. */
19111 	    l = *fnamelen;
19112 	    if (!get_short_pathname(fnamep, bufp, &l))
19113 		return -1;
19114 
19115 	    if (l == 0)
19116 	    {
19117 		/* Couldn't find the filename.. search the paths.
19118 		 */
19119 		l = *fnamelen;
19120 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19121 		    return -1;
19122 	    }
19123 	    *fnamelen = l;
19124 	}
19125     }
19126 #endif /* WIN3264 */
19127 
19128     /* ":t" - tail, just the basename */
19129     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19130     {
19131 	*usedlen += 2;
19132 	*fnamelen -= (int)(tail - *fnamep);
19133 	*fnamep = tail;
19134     }
19135 
19136     /* ":e" - extension, can be repeated */
19137     /* ":r" - root, without extension, can be repeated */
19138     while (src[*usedlen] == ':'
19139 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19140     {
19141 	/* find a '.' in the tail:
19142 	 * - for second :e: before the current fname
19143 	 * - otherwise: The last '.'
19144 	 */
19145 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19146 	    s = *fnamep - 2;
19147 	else
19148 	    s = *fnamep + *fnamelen - 1;
19149 	for ( ; s > tail; --s)
19150 	    if (s[0] == '.')
19151 		break;
19152 	if (src[*usedlen + 1] == 'e')		/* :e */
19153 	{
19154 	    if (s > tail)
19155 	    {
19156 		*fnamelen += (int)(*fnamep - (s + 1));
19157 		*fnamep = s + 1;
19158 #ifdef VMS
19159 		/* cut version from the extension */
19160 		s = *fnamep + *fnamelen - 1;
19161 		for ( ; s > *fnamep; --s)
19162 		    if (s[0] == ';')
19163 			break;
19164 		if (s > *fnamep)
19165 		    *fnamelen = s - *fnamep;
19166 #endif
19167 	    }
19168 	    else if (*fnamep <= tail)
19169 		*fnamelen = 0;
19170 	}
19171 	else				/* :r */
19172 	{
19173 	    if (s > tail)	/* remove one extension */
19174 		*fnamelen = (int)(s - *fnamep);
19175 	}
19176 	*usedlen += 2;
19177     }
19178 
19179     /* ":s?pat?foo?" - substitute */
19180     /* ":gs?pat?foo?" - global substitute */
19181     if (src[*usedlen] == ':'
19182 	    && (src[*usedlen + 1] == 's'
19183 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19184     {
19185 	char_u	    *str;
19186 	char_u	    *pat;
19187 	char_u	    *sub;
19188 	int	    sep;
19189 	char_u	    *flags;
19190 	int	    didit = FALSE;
19191 
19192 	flags = (char_u *)"";
19193 	s = src + *usedlen + 2;
19194 	if (src[*usedlen + 1] == 'g')
19195 	{
19196 	    flags = (char_u *)"g";
19197 	    ++s;
19198 	}
19199 
19200 	sep = *s++;
19201 	if (sep)
19202 	{
19203 	    /* find end of pattern */
19204 	    p = vim_strchr(s, sep);
19205 	    if (p != NULL)
19206 	    {
19207 		pat = vim_strnsave(s, (int)(p - s));
19208 		if (pat != NULL)
19209 		{
19210 		    s = p + 1;
19211 		    /* find end of substitution */
19212 		    p = vim_strchr(s, sep);
19213 		    if (p != NULL)
19214 		    {
19215 			sub = vim_strnsave(s, (int)(p - s));
19216 			str = vim_strnsave(*fnamep, *fnamelen);
19217 			if (sub != NULL && str != NULL)
19218 			{
19219 			    *usedlen = (int)(p + 1 - src);
19220 			    s = do_string_sub(str, pat, sub, flags);
19221 			    if (s != NULL)
19222 			    {
19223 				*fnamep = s;
19224 				*fnamelen = (int)STRLEN(s);
19225 				vim_free(*bufp);
19226 				*bufp = s;
19227 				didit = TRUE;
19228 			    }
19229 			}
19230 			vim_free(sub);
19231 			vim_free(str);
19232 		    }
19233 		    vim_free(pat);
19234 		}
19235 	    }
19236 	    /* after using ":s", repeat all the modifiers */
19237 	    if (didit)
19238 		goto repeat;
19239 	}
19240     }
19241 
19242     return valid;
19243 }
19244 
19245 /*
19246  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19247  * "flags" can be "g" to do a global substitute.
19248  * Returns an allocated string, NULL for error.
19249  */
19250     char_u *
19251 do_string_sub(str, pat, sub, flags)
19252     char_u	*str;
19253     char_u	*pat;
19254     char_u	*sub;
19255     char_u	*flags;
19256 {
19257     int		sublen;
19258     regmatch_T	regmatch;
19259     int		i;
19260     int		do_all;
19261     char_u	*tail;
19262     garray_T	ga;
19263     char_u	*ret;
19264     char_u	*save_cpo;
19265 
19266     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19267     save_cpo = p_cpo;
19268     p_cpo = (char_u *)"";
19269 
19270     ga_init2(&ga, 1, 200);
19271 
19272     do_all = (flags[0] == 'g');
19273 
19274     regmatch.rm_ic = p_ic;
19275     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19276     if (regmatch.regprog != NULL)
19277     {
19278 	tail = str;
19279 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19280 	{
19281 	    /*
19282 	     * Get some space for a temporary buffer to do the substitution
19283 	     * into.  It will contain:
19284 	     * - The text up to where the match is.
19285 	     * - The substituted text.
19286 	     * - The text after the match.
19287 	     */
19288 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19289 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19290 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19291 	    {
19292 		ga_clear(&ga);
19293 		break;
19294 	    }
19295 
19296 	    /* copy the text up to where the match is */
19297 	    i = (int)(regmatch.startp[0] - tail);
19298 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19299 	    /* add the substituted text */
19300 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19301 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19302 	    ga.ga_len += i + sublen - 1;
19303 	    /* avoid getting stuck on a match with an empty string */
19304 	    if (tail == regmatch.endp[0])
19305 	    {
19306 		if (*tail == NUL)
19307 		    break;
19308 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19309 		++ga.ga_len;
19310 	    }
19311 	    else
19312 	    {
19313 		tail = regmatch.endp[0];
19314 		if (*tail == NUL)
19315 		    break;
19316 	    }
19317 	    if (!do_all)
19318 		break;
19319 	}
19320 
19321 	if (ga.ga_data != NULL)
19322 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19323 
19324 	vim_free(regmatch.regprog);
19325     }
19326 
19327     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19328     ga_clear(&ga);
19329     p_cpo = save_cpo;
19330 
19331     return ret;
19332 }
19333 
19334 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19335