xref: /vim-8.2.3635/src/eval.c (revision bfd8fc05) 
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_append_string __ARGS((list_T *l, char_u *str));
413 static int list_insert_tv __ARGS((list_T *l, typval_T *tv, listitem_T *item));
414 static int list_extend __ARGS((list_T	*l1, list_T *l2, listitem_T *bef));
415 static int list_concat __ARGS((list_T *l1, list_T *l2, typval_T *tv));
416 static list_T *list_copy __ARGS((list_T *orig, int deep, int copyID));
417 static void list_remove __ARGS((list_T *l, listitem_T *item, listitem_T *item2));
418 static char_u *list2string __ARGS((typval_T *tv));
419 static int list_join __ARGS((garray_T *gap, list_T *l, char_u *sep, int echo));
420 static void set_ref_in_ht __ARGS((hashtab_T *ht, int copyID));
421 static void set_ref_in_list __ARGS((list_T *l, int copyID));
422 static void set_ref_in_item __ARGS((typval_T *tv, int copyID));
423 static void dict_unref __ARGS((dict_T *d));
424 static void dict_free __ARGS((dict_T *d));
425 static dictitem_T *dictitem_alloc __ARGS((char_u *key));
426 static dictitem_T *dictitem_copy __ARGS((dictitem_T *org));
427 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
428 static void dictitem_free __ARGS((dictitem_T *item));
429 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
430 static int dict_add __ARGS((dict_T *d, dictitem_T *item));
431 static long dict_len __ARGS((dict_T *d));
432 static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
433 static char_u *dict2string __ARGS((typval_T *tv));
434 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
435 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf));
436 static char_u *tv2string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf));
437 static char_u *string_quote __ARGS((char_u *str, int function));
438 static int get_env_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
439 static int find_internal_func __ARGS((char_u *name));
440 static char_u *deref_func_name __ARGS((char_u *name, int *lenp));
441 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));
442 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));
443 static void emsg_funcname __ARGS((char *msg, char_u *name));
444 
445 static void f_add __ARGS((typval_T *argvars, typval_T *rettv));
446 static void f_append __ARGS((typval_T *argvars, typval_T *rettv));
447 static void f_argc __ARGS((typval_T *argvars, typval_T *rettv));
448 static void f_argidx __ARGS((typval_T *argvars, typval_T *rettv));
449 static void f_argv __ARGS((typval_T *argvars, typval_T *rettv));
450 static void f_browse __ARGS((typval_T *argvars, typval_T *rettv));
451 static void f_browsedir __ARGS((typval_T *argvars, typval_T *rettv));
452 static void f_bufexists __ARGS((typval_T *argvars, typval_T *rettv));
453 static void f_buflisted __ARGS((typval_T *argvars, typval_T *rettv));
454 static void f_bufloaded __ARGS((typval_T *argvars, typval_T *rettv));
455 static void f_bufname __ARGS((typval_T *argvars, typval_T *rettv));
456 static void f_bufnr __ARGS((typval_T *argvars, typval_T *rettv));
457 static void f_bufwinnr __ARGS((typval_T *argvars, typval_T *rettv));
458 static void f_byte2line __ARGS((typval_T *argvars, typval_T *rettv));
459 static void f_byteidx __ARGS((typval_T *argvars, typval_T *rettv));
460 static void f_call __ARGS((typval_T *argvars, typval_T *rettv));
461 static void f_char2nr __ARGS((typval_T *argvars, typval_T *rettv));
462 static void f_cindent __ARGS((typval_T *argvars, typval_T *rettv));
463 static void f_col __ARGS((typval_T *argvars, typval_T *rettv));
464 #if defined(FEAT_INS_EXPAND)
465 static void f_complete_add __ARGS((typval_T *argvars, typval_T *rettv));
466 static void f_complete_check __ARGS((typval_T *argvars, typval_T *rettv));
467 #endif
468 static void f_confirm __ARGS((typval_T *argvars, typval_T *rettv));
469 static void f_copy __ARGS((typval_T *argvars, typval_T *rettv));
470 static void f_count __ARGS((typval_T *argvars, typval_T *rettv));
471 static void f_cscope_connection __ARGS((typval_T *argvars, typval_T *rettv));
472 static void f_cursor __ARGS((typval_T *argsvars, typval_T *rettv));
473 static void f_deepcopy __ARGS((typval_T *argvars, typval_T *rettv));
474 static void f_delete __ARGS((typval_T *argvars, typval_T *rettv));
475 static void f_did_filetype __ARGS((typval_T *argvars, typval_T *rettv));
476 static void f_diff_filler __ARGS((typval_T *argvars, typval_T *rettv));
477 static void f_diff_hlID __ARGS((typval_T *argvars, typval_T *rettv));
478 static void f_empty __ARGS((typval_T *argvars, typval_T *rettv));
479 static void f_escape __ARGS((typval_T *argvars, typval_T *rettv));
480 static void f_eval __ARGS((typval_T *argvars, typval_T *rettv));
481 static void f_eventhandler __ARGS((typval_T *argvars, typval_T *rettv));
482 static void f_executable __ARGS((typval_T *argvars, typval_T *rettv));
483 static void f_exists __ARGS((typval_T *argvars, typval_T *rettv));
484 static void f_expand __ARGS((typval_T *argvars, typval_T *rettv));
485 static void f_extend __ARGS((typval_T *argvars, typval_T *rettv));
486 static void f_filereadable __ARGS((typval_T *argvars, typval_T *rettv));
487 static void f_filewritable __ARGS((typval_T *argvars, typval_T *rettv));
488 static void f_filter __ARGS((typval_T *argvars, typval_T *rettv));
489 static void f_finddir __ARGS((typval_T *argvars, typval_T *rettv));
490 static void f_findfile __ARGS((typval_T *argvars, typval_T *rettv));
491 static void f_fnamemodify __ARGS((typval_T *argvars, typval_T *rettv));
492 static void f_foldclosed __ARGS((typval_T *argvars, typval_T *rettv));
493 static void f_foldclosedend __ARGS((typval_T *argvars, typval_T *rettv));
494 static void f_foldlevel __ARGS((typval_T *argvars, typval_T *rettv));
495 static void f_foldtext __ARGS((typval_T *argvars, typval_T *rettv));
496 static void f_foldtextresult __ARGS((typval_T *argvars, typval_T *rettv));
497 static void f_foreground __ARGS((typval_T *argvars, typval_T *rettv));
498 static void f_function __ARGS((typval_T *argvars, typval_T *rettv));
499 static void f_garbagecollect __ARGS((typval_T *argvars, typval_T *rettv));
500 static void f_get __ARGS((typval_T *argvars, typval_T *rettv));
501 static void f_getbufline __ARGS((typval_T *argvars, typval_T *rettv));
502 static void f_getbufvar __ARGS((typval_T *argvars, typval_T *rettv));
503 static void f_getchar __ARGS((typval_T *argvars, typval_T *rettv));
504 static void f_getcharmod __ARGS((typval_T *argvars, typval_T *rettv));
505 static void f_getcmdline __ARGS((typval_T *argvars, typval_T *rettv));
506 static void f_getcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
507 static void f_getcmdtype __ARGS((typval_T *argvars, typval_T *rettv));
508 static void f_getcwd __ARGS((typval_T *argvars, typval_T *rettv));
509 static void f_getfontname __ARGS((typval_T *argvars, typval_T *rettv));
510 static void f_getfperm __ARGS((typval_T *argvars, typval_T *rettv));
511 static void f_getfsize __ARGS((typval_T *argvars, typval_T *rettv));
512 static void f_getftime __ARGS((typval_T *argvars, typval_T *rettv));
513 static void f_getftype __ARGS((typval_T *argvars, typval_T *rettv));
514 static void f_getline __ARGS((typval_T *argvars, typval_T *rettv));
515 static void f_getqflist __ARGS((typval_T *argvars, typval_T *rettv));
516 static void f_getreg __ARGS((typval_T *argvars, typval_T *rettv));
517 static void f_getregtype __ARGS((typval_T *argvars, typval_T *rettv));
518 static void f_getwinposx __ARGS((typval_T *argvars, typval_T *rettv));
519 static void f_getwinposy __ARGS((typval_T *argvars, typval_T *rettv));
520 static void f_getwinvar __ARGS((typval_T *argvars, typval_T *rettv));
521 static void f_glob __ARGS((typval_T *argvars, typval_T *rettv));
522 static void f_globpath __ARGS((typval_T *argvars, typval_T *rettv));
523 static void f_has __ARGS((typval_T *argvars, typval_T *rettv));
524 static void f_has_key __ARGS((typval_T *argvars, typval_T *rettv));
525 static void f_hasmapto __ARGS((typval_T *argvars, typval_T *rettv));
526 static void f_histadd __ARGS((typval_T *argvars, typval_T *rettv));
527 static void f_histdel __ARGS((typval_T *argvars, typval_T *rettv));
528 static void f_histget __ARGS((typval_T *argvars, typval_T *rettv));
529 static void f_histnr __ARGS((typval_T *argvars, typval_T *rettv));
530 static void f_hlID __ARGS((typval_T *argvars, typval_T *rettv));
531 static void f_hlexists __ARGS((typval_T *argvars, typval_T *rettv));
532 static void f_hostname __ARGS((typval_T *argvars, typval_T *rettv));
533 static void f_iconv __ARGS((typval_T *argvars, typval_T *rettv));
534 static void f_indent __ARGS((typval_T *argvars, typval_T *rettv));
535 static void f_index __ARGS((typval_T *argvars, typval_T *rettv));
536 static void f_input __ARGS((typval_T *argvars, typval_T *rettv));
537 static void f_inputdialog __ARGS((typval_T *argvars, typval_T *rettv));
538 static void f_inputlist __ARGS((typval_T *argvars, typval_T *rettv));
539 static void f_inputrestore __ARGS((typval_T *argvars, typval_T *rettv));
540 static void f_inputsave __ARGS((typval_T *argvars, typval_T *rettv));
541 static void f_inputsecret __ARGS((typval_T *argvars, typval_T *rettv));
542 static void f_insert __ARGS((typval_T *argvars, typval_T *rettv));
543 static void f_isdirectory __ARGS((typval_T *argvars, typval_T *rettv));
544 static void f_islocked __ARGS((typval_T *argvars, typval_T *rettv));
545 static void f_items __ARGS((typval_T *argvars, typval_T *rettv));
546 static void f_join __ARGS((typval_T *argvars, typval_T *rettv));
547 static void f_keys __ARGS((typval_T *argvars, typval_T *rettv));
548 static void f_last_buffer_nr __ARGS((typval_T *argvars, typval_T *rettv));
549 static void f_len __ARGS((typval_T *argvars, typval_T *rettv));
550 static void f_libcall __ARGS((typval_T *argvars, typval_T *rettv));
551 static void f_libcallnr __ARGS((typval_T *argvars, typval_T *rettv));
552 static void f_line __ARGS((typval_T *argvars, typval_T *rettv));
553 static void f_line2byte __ARGS((typval_T *argvars, typval_T *rettv));
554 static void f_lispindent __ARGS((typval_T *argvars, typval_T *rettv));
555 static void f_localtime __ARGS((typval_T *argvars, typval_T *rettv));
556 static void f_map __ARGS((typval_T *argvars, typval_T *rettv));
557 static void f_maparg __ARGS((typval_T *argvars, typval_T *rettv));
558 static void f_mapcheck __ARGS((typval_T *argvars, typval_T *rettv));
559 static void f_match __ARGS((typval_T *argvars, typval_T *rettv));
560 static void f_matchend __ARGS((typval_T *argvars, typval_T *rettv));
561 static void f_matchlist __ARGS((typval_T *argvars, typval_T *rettv));
562 static void f_matchstr __ARGS((typval_T *argvars, typval_T *rettv));
563 static void f_max __ARGS((typval_T *argvars, typval_T *rettv));
564 static void f_min __ARGS((typval_T *argvars, typval_T *rettv));
565 #ifdef vim_mkdir
566 static void f_mkdir __ARGS((typval_T *argvars, typval_T *rettv));
567 #endif
568 static void f_mode __ARGS((typval_T *argvars, typval_T *rettv));
569 static void f_nextnonblank __ARGS((typval_T *argvars, typval_T *rettv));
570 static void f_nr2char __ARGS((typval_T *argvars, typval_T *rettv));
571 static void f_prevnonblank __ARGS((typval_T *argvars, typval_T *rettv));
572 static void f_printf __ARGS((typval_T *argvars, typval_T *rettv));
573 static void f_range __ARGS((typval_T *argvars, typval_T *rettv));
574 static void f_readfile __ARGS((typval_T *argvars, typval_T *rettv));
575 static void f_remote_expr __ARGS((typval_T *argvars, typval_T *rettv));
576 static void f_remote_foreground __ARGS((typval_T *argvars, typval_T *rettv));
577 static void f_remote_peek __ARGS((typval_T *argvars, typval_T *rettv));
578 static void f_remote_read __ARGS((typval_T *argvars, typval_T *rettv));
579 static void f_remote_send __ARGS((typval_T *argvars, typval_T *rettv));
580 static void f_remove __ARGS((typval_T *argvars, typval_T *rettv));
581 static void f_rename __ARGS((typval_T *argvars, typval_T *rettv));
582 static void f_repeat __ARGS((typval_T *argvars, typval_T *rettv));
583 static void f_resolve __ARGS((typval_T *argvars, typval_T *rettv));
584 static void f_reverse __ARGS((typval_T *argvars, typval_T *rettv));
585 static void f_search __ARGS((typval_T *argvars, typval_T *rettv));
586 static void f_searchdecl __ARGS((typval_T *argvars, typval_T *rettv));
587 static void f_searchpair __ARGS((typval_T *argvars, typval_T *rettv));
588 static void f_server2client __ARGS((typval_T *argvars, typval_T *rettv));
589 static void f_serverlist __ARGS((typval_T *argvars, typval_T *rettv));
590 static void f_setbufvar __ARGS((typval_T *argvars, typval_T *rettv));
591 static void f_setcmdpos __ARGS((typval_T *argvars, typval_T *rettv));
592 static void f_setline __ARGS((typval_T *argvars, typval_T *rettv));
593 static void f_setqflist __ARGS((typval_T *argvars, typval_T *rettv));
594 static void f_setreg __ARGS((typval_T *argvars, typval_T *rettv));
595 static void f_setwinvar __ARGS((typval_T *argvars, typval_T *rettv));
596 static void f_simplify __ARGS((typval_T *argvars, typval_T *rettv));
597 static void f_sort __ARGS((typval_T *argvars, typval_T *rettv));
598 static void f_soundfold __ARGS((typval_T *argvars, typval_T *rettv));
599 static void f_spellbadword __ARGS((typval_T *argvars, typval_T *rettv));
600 static void f_spellsuggest __ARGS((typval_T *argvars, typval_T *rettv));
601 static void f_split __ARGS((typval_T *argvars, typval_T *rettv));
602 #ifdef HAVE_STRFTIME
603 static void f_strftime __ARGS((typval_T *argvars, typval_T *rettv));
604 #endif
605 static void f_stridx __ARGS((typval_T *argvars, typval_T *rettv));
606 static void f_string __ARGS((typval_T *argvars, typval_T *rettv));
607 static void f_strlen __ARGS((typval_T *argvars, typval_T *rettv));
608 static void f_strpart __ARGS((typval_T *argvars, typval_T *rettv));
609 static void f_strridx __ARGS((typval_T *argvars, typval_T *rettv));
610 static void f_strtrans __ARGS((typval_T *argvars, typval_T *rettv));
611 static void f_submatch __ARGS((typval_T *argvars, typval_T *rettv));
612 static void f_substitute __ARGS((typval_T *argvars, typval_T *rettv));
613 static void f_synID __ARGS((typval_T *argvars, typval_T *rettv));
614 static void f_synIDattr __ARGS((typval_T *argvars, typval_T *rettv));
615 static void f_synIDtrans __ARGS((typval_T *argvars, typval_T *rettv));
616 static void f_system __ARGS((typval_T *argvars, typval_T *rettv));
617 static void f_taglist __ARGS((typval_T *argvars, typval_T *rettv));
618 static void f_tagfiles __ARGS((typval_T *argvars, typval_T *rettv));
619 static void f_tempname __ARGS((typval_T *argvars, typval_T *rettv));
620 static void f_test __ARGS((typval_T *argvars, typval_T *rettv));
621 static void f_tolower __ARGS((typval_T *argvars, typval_T *rettv));
622 static void f_toupper __ARGS((typval_T *argvars, typval_T *rettv));
623 static void f_tr __ARGS((typval_T *argvars, typval_T *rettv));
624 static void f_type __ARGS((typval_T *argvars, typval_T *rettv));
625 static void f_values __ARGS((typval_T *argvars, typval_T *rettv));
626 static void f_virtcol __ARGS((typval_T *argvars, typval_T *rettv));
627 static void f_visualmode __ARGS((typval_T *argvars, typval_T *rettv));
628 static void f_winbufnr __ARGS((typval_T *argvars, typval_T *rettv));
629 static void f_wincol __ARGS((typval_T *argvars, typval_T *rettv));
630 static void f_winheight __ARGS((typval_T *argvars, typval_T *rettv));
631 static void f_winline __ARGS((typval_T *argvars, typval_T *rettv));
632 static void f_winnr __ARGS((typval_T *argvars, typval_T *rettv));
633 static void f_winrestcmd __ARGS((typval_T *argvars, typval_T *rettv));
634 static void f_winwidth __ARGS((typval_T *argvars, typval_T *rettv));
635 static void f_writefile __ARGS((typval_T *argvars, typval_T *rettv));
636 
637 static pos_T *var2fpos __ARGS((typval_T *varp, int lnum));
638 static int get_env_len __ARGS((char_u **arg));
639 static int get_id_len __ARGS((char_u **arg));
640 static int get_name_len __ARGS((char_u **arg, char_u **alias, int evaluate, int verbose));
641 static char_u *find_name_end __ARGS((char_u *arg, char_u **expr_start, char_u **expr_end, int flags));
642 #define FNE_INCL_BR	1	/* find_name_end(): include [] in name */
643 #define FNE_CHECK_START	2	/* find_name_end(): check name starts with
644 				   valid character */
645 static char_u * make_expanded_name __ARGS((char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end));
646 static int eval_isnamec __ARGS((int c));
647 static int eval_isnamec1 __ARGS((int c));
648 static int get_var_tv __ARGS((char_u *name, int len, typval_T *rettv, int verbose));
649 static int handle_subscript __ARGS((char_u **arg, typval_T *rettv, int evaluate, int verbose));
650 static typval_T *alloc_tv __ARGS((void));
651 static typval_T *alloc_string_tv __ARGS((char_u *string));
652 static void free_tv __ARGS((typval_T *varp));
653 static void init_tv __ARGS((typval_T *varp));
654 static long get_tv_number __ARGS((typval_T *varp));
655 static linenr_T get_tv_lnum __ARGS((typval_T *argvars));
656 static linenr_T get_tv_lnum_buf __ARGS((typval_T *argvars, buf_T *buf));
657 static char_u *get_tv_string __ARGS((typval_T *varp));
658 static char_u *get_tv_string_buf __ARGS((typval_T *varp, char_u *buf));
659 static char_u *get_tv_string_buf_chk __ARGS((typval_T *varp, char_u *buf));
660 static dictitem_T *find_var __ARGS((char_u *name, hashtab_T **htp));
661 static dictitem_T *find_var_in_ht __ARGS((hashtab_T *ht, char_u *varname, int writing));
662 static hashtab_T *find_var_ht __ARGS((char_u *name, char_u **varname));
663 static void vars_clear_ext __ARGS((hashtab_T *ht, int free_val));
664 static void delete_var __ARGS((hashtab_T *ht, hashitem_T *hi));
665 static void list_one_var __ARGS((dictitem_T *v, char_u *prefix));
666 static void list_one_var_a __ARGS((char_u *prefix, char_u *name, int type, char_u *string));
667 static void set_var __ARGS((char_u *name, typval_T *varp, int copy));
668 static int var_check_ro __ARGS((int flags, char_u *name));
669 static int tv_check_lock __ARGS((int lock, char_u *name));
670 static void copy_tv __ARGS((typval_T *from, typval_T *to));
671 static int item_copy __ARGS((typval_T *from, typval_T *to, int deep, int copyID));
672 static char_u *find_option_end __ARGS((char_u **arg, int *opt_flags));
673 static char_u *trans_function_name __ARGS((char_u **pp, int skip, int flags, funcdict_T *fd));
674 static int eval_fname_script __ARGS((char_u *p));
675 static int eval_fname_sid __ARGS((char_u *p));
676 static void list_func_head __ARGS((ufunc_T *fp, int indent));
677 static ufunc_T *find_func __ARGS((char_u *name));
678 static int function_exists __ARGS((char_u *name));
679 static int builtin_function __ARGS((char_u *name));
680 #ifdef FEAT_PROFILE
681 static void func_do_profile __ARGS((ufunc_T *fp));
682 static void prof_sort_list __ARGS((FILE *fd, ufunc_T **sorttab, int st_len, char *title, int prefer_self));
683 static void prof_func_line __ARGS((FILE *fd, int count, proftime_T *total, proftime_T *self, int prefer_self));
684 static int
685 # ifdef __BORLANDC__
686     _RTLENTRYF
687 # endif
688 	prof_total_cmp __ARGS((const void *s1, const void *s2));
689 static int
690 # ifdef __BORLANDC__
691     _RTLENTRYF
692 # endif
693 	prof_self_cmp __ARGS((const void *s1, const void *s2));
694 #endif
695 static int script_autoload __ARGS((char_u *name, int reload));
696 static char_u *autoload_name __ARGS((char_u *name));
697 static void cat_func_name __ARGS((char_u *buf, ufunc_T *fp));
698 static void func_free __ARGS((ufunc_T *fp));
699 static void func_unref __ARGS((char_u *name));
700 static void func_ref __ARGS((char_u *name));
701 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));
702 static void add_nr_var __ARGS((dict_T *dp, dictitem_T *v, char *name, varnumber_T nr));
703 
704 /* Character used as separated in autoload function/variable names. */
705 #define AUTOLOAD_CHAR '#'
706 
707 /*
708  * Initialize the global and v: variables.
709  */
710     void
711 eval_init()
712 {
713     int		    i;
714     struct vimvar   *p;
715 
716     init_var_dict(&globvardict, &globvars_var);
717     init_var_dict(&vimvardict, &vimvars_var);
718     hash_init(&compat_hashtab);
719     hash_init(&func_hashtab);
720 
721     for (i = 0; i < VV_LEN; ++i)
722     {
723 	p = &vimvars[i];
724 	STRCPY(p->vv_di.di_key, p->vv_name);
725 	if (p->vv_flags & VV_RO)
726 	    p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
727 	else if (p->vv_flags & VV_RO_SBX)
728 	    p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
729 	else
730 	    p->vv_di.di_flags = DI_FLAGS_FIX;
731 
732 	/* add to v: scope dict, unless the value is not always available */
733 	if (p->vv_type != VAR_UNKNOWN)
734 	    hash_add(&vimvarht, p->vv_di.di_key);
735 	if (p->vv_flags & VV_COMPAT)
736 	    /* add to compat scope dict */
737 	    hash_add(&compat_hashtab, p->vv_di.di_key);
738     }
739 }
740 
741 #if defined(EXITFREE) || defined(PROTO)
742     void
743 eval_clear()
744 {
745     int		    i;
746     struct vimvar   *p;
747 
748     for (i = 0; i < VV_LEN; ++i)
749     {
750 	p = &vimvars[i];
751 	if (p->vv_di.di_tv.v_type == VAR_STRING)
752 	{
753 	    vim_free(p->vv_di.di_tv.vval.v_string);
754 	    p->vv_di.di_tv.vval.v_string = NULL;
755 	}
756     }
757     hash_clear(&vimvarht);
758     hash_clear(&compat_hashtab);
759 
760     /* script-local variables */
761     for (i = 1; i <= ga_scripts.ga_len; ++i)
762 	vars_clear(&SCRIPT_VARS(i));
763     ga_clear(&ga_scripts);
764     free_scriptnames();
765 
766     /* global variables */
767     vars_clear(&globvarht);
768 
769     /* functions */
770     free_all_functions();
771     hash_clear(&func_hashtab);
772 
773     /* unreferenced lists and dicts */
774     (void)garbage_collect();
775 }
776 #endif
777 
778 /*
779  * Return the name of the executed function.
780  */
781     char_u *
782 func_name(cookie)
783     void *cookie;
784 {
785     return ((funccall_T *)cookie)->func->uf_name;
786 }
787 
788 /*
789  * Return the address holding the next breakpoint line for a funccall cookie.
790  */
791     linenr_T *
792 func_breakpoint(cookie)
793     void *cookie;
794 {
795     return &((funccall_T *)cookie)->breakpoint;
796 }
797 
798 /*
799  * Return the address holding the debug tick for a funccall cookie.
800  */
801     int *
802 func_dbg_tick(cookie)
803     void *cookie;
804 {
805     return &((funccall_T *)cookie)->dbg_tick;
806 }
807 
808 /*
809  * Return the nesting level for a funccall cookie.
810  */
811     int
812 func_level(cookie)
813     void *cookie;
814 {
815     return ((funccall_T *)cookie)->level;
816 }
817 
818 /* pointer to funccal for currently active function */
819 funccall_T *current_funccal = NULL;
820 
821 /*
822  * Return TRUE when a function was ended by a ":return" command.
823  */
824     int
825 current_func_returned()
826 {
827     return current_funccal->returned;
828 }
829 
830 
831 /*
832  * Set an internal variable to a string value. Creates the variable if it does
833  * not already exist.
834  */
835     void
836 set_internal_string_var(name, value)
837     char_u	*name;
838     char_u	*value;
839 {
840     char_u	*val;
841     typval_T	*tvp;
842 
843     val = vim_strsave(value);
844     if (val != NULL)
845     {
846 	tvp = alloc_string_tv(val);
847 	if (tvp != NULL)
848 	{
849 	    set_var(name, tvp, FALSE);
850 	    free_tv(tvp);
851 	}
852     }
853 }
854 
855 static lval_T	*redir_lval = NULL;
856 static char_u	*redir_endp = NULL;
857 static char_u	*redir_varname = NULL;
858 
859 /*
860  * Start recording command output to a variable
861  * Returns OK if successfully completed the setup.  FAIL otherwise.
862  */
863     int
864 var_redir_start(name, append)
865     char_u	*name;
866     int		append;		/* append to an existing variable */
867 {
868     int		save_emsg;
869     int		err;
870     typval_T	tv;
871 
872     /* Make sure a valid variable name is specified */
873     if (!eval_isnamec1(*name))
874     {
875 	EMSG(_(e_invarg));
876 	return FAIL;
877     }
878 
879     redir_varname = vim_strsave(name);
880     if (redir_varname == NULL)
881 	return FAIL;
882 
883     redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
884     if (redir_lval == NULL)
885     {
886 	var_redir_stop();
887 	return FAIL;
888     }
889 
890     /* Parse the variable name (can be a dict or list entry). */
891     redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
892 							     FNE_CHECK_START);
893     if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
894     {
895 	if (redir_endp != NULL && *redir_endp != NUL)
896 	    /* Trailing characters are present after the variable name */
897 	    EMSG(_(e_trailing));
898 	else
899 	    EMSG(_(e_invarg));
900 	var_redir_stop();
901 	return FAIL;
902     }
903 
904     /* check if we can write to the variable: set it to or append an empty
905      * string */
906     save_emsg = did_emsg;
907     did_emsg = FALSE;
908     tv.v_type = VAR_STRING;
909     tv.vval.v_string = (char_u *)"";
910     if (append)
911 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
912     else
913 	set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
914     err = did_emsg;
915     did_emsg += save_emsg;
916     if (err)
917     {
918 	var_redir_stop();
919 	return FAIL;
920     }
921     if (redir_lval->ll_newkey != NULL)
922     {
923 	/* Dictionary item was created, don't do it again. */
924 	vim_free(redir_lval->ll_newkey);
925 	redir_lval->ll_newkey = NULL;
926     }
927 
928     return OK;
929 }
930 
931 /*
932  * Append "value[len]" to the variable set by var_redir_start().
933  */
934     void
935 var_redir_str(value, len)
936     char_u	*value;
937     int		len;
938 {
939     char_u	*val;
940     typval_T	tv;
941     int		save_emsg;
942     int		err;
943 
944     if (redir_lval == NULL)
945 	return;
946 
947     if (len == -1)
948 	/* Append the entire string */
949 	val = vim_strsave(value);
950     else
951 	/* Append only the specified number of characters */
952 	val = vim_strnsave(value, len);
953     if (val == NULL)
954 	return;
955 
956     tv.v_type = VAR_STRING;
957     tv.vval.v_string = val;
958 
959     save_emsg = did_emsg;
960     did_emsg = FALSE;
961     set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
962     err = did_emsg;
963     did_emsg += save_emsg;
964     if (err)
965 	var_redir_stop();
966 
967     vim_free(tv.vval.v_string);
968 }
969 
970 /*
971  * Stop redirecting command output to a variable.
972  */
973     void
974 var_redir_stop()
975 {
976     if (redir_lval != NULL)
977     {
978 	clear_lval(redir_lval);
979 	vim_free(redir_lval);
980 	redir_lval = NULL;
981     }
982     vim_free(redir_varname);
983     redir_varname = NULL;
984 }
985 
986 # if defined(FEAT_MBYTE) || defined(PROTO)
987     int
988 eval_charconvert(enc_from, enc_to, fname_from, fname_to)
989     char_u	*enc_from;
990     char_u	*enc_to;
991     char_u	*fname_from;
992     char_u	*fname_to;
993 {
994     int		err = FALSE;
995 
996     set_vim_var_string(VV_CC_FROM, enc_from, -1);
997     set_vim_var_string(VV_CC_TO, enc_to, -1);
998     set_vim_var_string(VV_FNAME_IN, fname_from, -1);
999     set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
1000     if (eval_to_bool(p_ccv, &err, NULL, FALSE))
1001 	err = TRUE;
1002     set_vim_var_string(VV_CC_FROM, NULL, -1);
1003     set_vim_var_string(VV_CC_TO, NULL, -1);
1004     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1005     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1006 
1007     if (err)
1008 	return FAIL;
1009     return OK;
1010 }
1011 # endif
1012 
1013 # if defined(FEAT_POSTSCRIPT) || defined(PROTO)
1014     int
1015 eval_printexpr(fname, args)
1016     char_u	*fname;
1017     char_u	*args;
1018 {
1019     int		err = FALSE;
1020 
1021     set_vim_var_string(VV_FNAME_IN, fname, -1);
1022     set_vim_var_string(VV_CMDARG, args, -1);
1023     if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
1024 	err = TRUE;
1025     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1026     set_vim_var_string(VV_CMDARG, NULL, -1);
1027 
1028     if (err)
1029     {
1030 	mch_remove(fname);
1031 	return FAIL;
1032     }
1033     return OK;
1034 }
1035 # endif
1036 
1037 # if defined(FEAT_DIFF) || defined(PROTO)
1038     void
1039 eval_diff(origfile, newfile, outfile)
1040     char_u	*origfile;
1041     char_u	*newfile;
1042     char_u	*outfile;
1043 {
1044     int		err = FALSE;
1045 
1046     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1047     set_vim_var_string(VV_FNAME_NEW, newfile, -1);
1048     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1049     (void)eval_to_bool(p_dex, &err, NULL, FALSE);
1050     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1051     set_vim_var_string(VV_FNAME_NEW, NULL, -1);
1052     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1053 }
1054 
1055     void
1056 eval_patch(origfile, difffile, outfile)
1057     char_u	*origfile;
1058     char_u	*difffile;
1059     char_u	*outfile;
1060 {
1061     int		err;
1062 
1063     set_vim_var_string(VV_FNAME_IN, origfile, -1);
1064     set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
1065     set_vim_var_string(VV_FNAME_OUT, outfile, -1);
1066     (void)eval_to_bool(p_pex, &err, NULL, FALSE);
1067     set_vim_var_string(VV_FNAME_IN, NULL, -1);
1068     set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
1069     set_vim_var_string(VV_FNAME_OUT, NULL, -1);
1070 }
1071 # endif
1072 
1073 /*
1074  * Top level evaluation function, returning a boolean.
1075  * Sets "error" to TRUE if there was an error.
1076  * Return TRUE or FALSE.
1077  */
1078     int
1079 eval_to_bool(arg, error, nextcmd, skip)
1080     char_u	*arg;
1081     int		*error;
1082     char_u	**nextcmd;
1083     int		skip;	    /* only parse, don't execute */
1084 {
1085     typval_T	tv;
1086     int		retval = FALSE;
1087 
1088     if (skip)
1089 	++emsg_skip;
1090     if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
1091 	*error = TRUE;
1092     else
1093     {
1094 	*error = FALSE;
1095 	if (!skip)
1096 	{
1097 	    retval = (get_tv_number_chk(&tv, error) != 0);
1098 	    clear_tv(&tv);
1099 	}
1100     }
1101     if (skip)
1102 	--emsg_skip;
1103 
1104     return retval;
1105 }
1106 
1107 /*
1108  * Top level evaluation function, returning a string.  If "skip" is TRUE,
1109  * only parsing to "nextcmd" is done, without reporting errors.  Return
1110  * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
1111  */
1112     char_u *
1113 eval_to_string_skip(arg, nextcmd, skip)
1114     char_u	*arg;
1115     char_u	**nextcmd;
1116     int		skip;	    /* only parse, don't execute */
1117 {
1118     typval_T	tv;
1119     char_u	*retval;
1120 
1121     if (skip)
1122 	++emsg_skip;
1123     if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
1124 	retval = NULL;
1125     else
1126     {
1127 	retval = vim_strsave(get_tv_string(&tv));
1128 	clear_tv(&tv);
1129     }
1130     if (skip)
1131 	--emsg_skip;
1132 
1133     return retval;
1134 }
1135 
1136 /*
1137  * Skip over an expression at "*pp".
1138  * Return FAIL for an error, OK otherwise.
1139  */
1140     int
1141 skip_expr(pp)
1142     char_u	**pp;
1143 {
1144     typval_T	rettv;
1145 
1146     *pp = skipwhite(*pp);
1147     return eval1(pp, &rettv, FALSE);
1148 }
1149 
1150 /*
1151  * Top level evaluation function, returning a string.
1152  * Return pointer to allocated memory, or NULL for failure.
1153  */
1154     char_u *
1155 eval_to_string(arg, nextcmd)
1156     char_u	*arg;
1157     char_u	**nextcmd;
1158 {
1159     typval_T	tv;
1160     char_u	*retval;
1161 
1162     if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
1163 	retval = NULL;
1164     else
1165     {
1166 	retval = vim_strsave(get_tv_string(&tv));
1167 	clear_tv(&tv);
1168     }
1169 
1170     return retval;
1171 }
1172 
1173 /*
1174  * Call eval_to_string() with "sandbox" set and not using local variables.
1175  */
1176     char_u *
1177 eval_to_string_safe(arg, nextcmd)
1178     char_u	*arg;
1179     char_u	**nextcmd;
1180 {
1181     char_u	*retval;
1182     void	*save_funccalp;
1183 
1184     save_funccalp = save_funccal();
1185     ++sandbox;
1186     retval = eval_to_string(arg, nextcmd);
1187     --sandbox;
1188     restore_funccal(save_funccalp);
1189     return retval;
1190 }
1191 
1192 /*
1193  * Top level evaluation function, returning a number.
1194  * Evaluates "expr" silently.
1195  * Returns -1 for an error.
1196  */
1197     int
1198 eval_to_number(expr)
1199     char_u	*expr;
1200 {
1201     typval_T	rettv;
1202     int		retval;
1203     char_u	*p = skipwhite(expr);
1204 
1205     ++emsg_off;
1206 
1207     if (eval1(&p, &rettv, TRUE) == FAIL)
1208 	retval = -1;
1209     else
1210     {
1211 	retval = get_tv_number_chk(&rettv, NULL);
1212 	clear_tv(&rettv);
1213     }
1214     --emsg_off;
1215 
1216     return retval;
1217 }
1218 
1219 /*
1220  * Prepare v: variable "idx" to be used.
1221  * Save the current typeval in "save_tv".
1222  * When not used yet add the variable to the v: hashtable.
1223  */
1224     static void
1225 prepare_vimvar(idx, save_tv)
1226     int		idx;
1227     typval_T	*save_tv;
1228 {
1229     *save_tv = vimvars[idx].vv_tv;
1230     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1231 	hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
1232 }
1233 
1234 /*
1235  * Restore v: variable "idx" to typeval "save_tv".
1236  * When no longer defined, remove the variable from the v: hashtable.
1237  */
1238     static void
1239 restore_vimvar(idx, save_tv)
1240     int		idx;
1241     typval_T	*save_tv;
1242 {
1243     hashitem_T	*hi;
1244 
1245     clear_tv(&vimvars[idx].vv_tv);
1246     vimvars[idx].vv_tv = *save_tv;
1247     if (vimvars[idx].vv_type == VAR_UNKNOWN)
1248     {
1249 	hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
1250 	if (HASHITEM_EMPTY(hi))
1251 	    EMSG2(_(e_intern2), "restore_vimvar()");
1252 	else
1253 	    hash_remove(&vimvarht, hi);
1254     }
1255 }
1256 
1257 #if defined(FEAT_SYN_HL) || defined(PROTO)
1258 /*
1259  * Evaluate an expression to a list with suggestions.
1260  * For the "expr:" part of 'spellsuggest'.
1261  */
1262     list_T *
1263 eval_spell_expr(badword, expr)
1264     char_u	*badword;
1265     char_u	*expr;
1266 {
1267     typval_T	save_val;
1268     typval_T	rettv;
1269     list_T	*list = NULL;
1270     char_u	*p = skipwhite(expr);
1271 
1272     /* Set "v:val" to the bad word. */
1273     prepare_vimvar(VV_VAL, &save_val);
1274     vimvars[VV_VAL].vv_type = VAR_STRING;
1275     vimvars[VV_VAL].vv_str = badword;
1276     if (p_verbose == 0)
1277 	++emsg_off;
1278 
1279     if (eval1(&p, &rettv, TRUE) == OK)
1280     {
1281 	if (rettv.v_type != VAR_LIST)
1282 	    clear_tv(&rettv);
1283 	else
1284 	    list = rettv.vval.v_list;
1285     }
1286 
1287     if (p_verbose == 0)
1288 	--emsg_off;
1289     vimvars[VV_VAL].vv_str = NULL;
1290     restore_vimvar(VV_VAL, &save_val);
1291 
1292     return list;
1293 }
1294 
1295 /*
1296  * "list" is supposed to contain two items: a word and a number.  Return the
1297  * word in "pp" and the number as the return value.
1298  * Return -1 if anything isn't right.
1299  * Used to get the good word and score from the eval_spell_expr() result.
1300  */
1301     int
1302 get_spellword(list, pp)
1303     list_T	*list;
1304     char_u	**pp;
1305 {
1306     listitem_T	*li;
1307 
1308     li = list->lv_first;
1309     if (li == NULL)
1310 	return -1;
1311     *pp = get_tv_string(&li->li_tv);
1312 
1313     li = li->li_next;
1314     if (li == NULL)
1315 	return -1;
1316     return get_tv_number(&li->li_tv);
1317 }
1318 #endif
1319 
1320 /*
1321  * Top level evaluation function,
1322  */
1323     typval_T *
1324 eval_expr(arg, nextcmd)
1325     char_u	*arg;
1326     char_u	**nextcmd;
1327 {
1328     typval_T	*tv;
1329 
1330     tv = (typval_T *)alloc(sizeof(typval_T));
1331     if (!tv)
1332 	return NULL;
1333 
1334     if (eval0(arg, tv, nextcmd, TRUE) == FAIL)
1335     {
1336 	vim_free(tv);
1337 	return NULL;
1338     }
1339 
1340     return tv;
1341 }
1342 
1343 
1344 #if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
1345 /*
1346  * Call some vimL function and return the result in "*rettv".
1347  * Uses argv[argc] for the function arguments.
1348  * Returns OK or FAIL.
1349  */
1350     static int
1351 call_vim_function(func, argc, argv, safe, rettv)
1352     char_u      *func;
1353     int		argc;
1354     char_u      **argv;
1355     int		safe;		/* use the sandbox */
1356     typval_T	*rettv;
1357 {
1358     typval_T	*argvars;
1359     long	n;
1360     int		len;
1361     int		i;
1362     int		doesrange;
1363     void	*save_funccalp = NULL;
1364     int		ret;
1365 
1366     argvars = (typval_T *)alloc((unsigned)(argc * sizeof(typval_T)));
1367     if (argvars == NULL)
1368 	return FAIL;
1369 
1370     for (i = 0; i < argc; i++)
1371     {
1372 	/* Pass a NULL or empty argument as an empty string */
1373 	if (argv[i] == NULL || *argv[i] == NUL)
1374 	{
1375 	    argvars[i].v_type = VAR_STRING;
1376 	    argvars[i].vval.v_string = (char_u *)"";
1377 	    continue;
1378 	}
1379 
1380 	/* Recognize a number argument, the others must be strings. */
1381 	vim_str2nr(argv[i], NULL, &len, TRUE, TRUE, &n, NULL);
1382 	if (len != 0 && len == (int)STRLEN(argv[i]))
1383 	{
1384 	    argvars[i].v_type = VAR_NUMBER;
1385 	    argvars[i].vval.v_number = n;
1386 	}
1387 	else
1388 	{
1389 	    argvars[i].v_type = VAR_STRING;
1390 	    argvars[i].vval.v_string = argv[i];
1391 	}
1392     }
1393 
1394     if (safe)
1395     {
1396 	save_funccalp = save_funccal();
1397 	++sandbox;
1398     }
1399 
1400     rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
1401     ret = call_func(func, (int)STRLEN(func), rettv, argc, argvars,
1402 		    curwin->w_cursor.lnum, curwin->w_cursor.lnum,
1403 		    &doesrange, TRUE, NULL);
1404     if (safe)
1405     {
1406 	--sandbox;
1407 	restore_funccal(save_funccalp);
1408     }
1409     vim_free(argvars);
1410 
1411     if (ret == FAIL)
1412 	clear_tv(rettv);
1413 
1414     return ret;
1415 }
1416 
1417 /*
1418  * Call vimL function "func" and return the result as a string.
1419  * Returns NULL when calling the function fails.
1420  * Uses argv[argc] for the function arguments.
1421  */
1422     void *
1423 call_func_retstr(func, argc, argv, safe)
1424     char_u      *func;
1425     int		argc;
1426     char_u      **argv;
1427     int		safe;		/* use the sandbox */
1428 {
1429     typval_T	rettv;
1430     char_u	*retval;
1431 
1432     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1433 	return NULL;
1434 
1435     retval = vim_strsave(get_tv_string(&rettv));
1436     clear_tv(&rettv);
1437     return retval;
1438 }
1439 
1440 #if defined(FEAT_COMPL_FUNC) || defined(PROTO)
1441 /*
1442  * Call vimL function "func" and return the result as a number.
1443  * Returns -1 when calling the function fails.
1444  * Uses argv[argc] for the function arguments.
1445  */
1446     long
1447 call_func_retnr(func, argc, argv, safe)
1448     char_u      *func;
1449     int		argc;
1450     char_u      **argv;
1451     int		safe;		/* use the sandbox */
1452 {
1453     typval_T	rettv;
1454     long	retval;
1455 
1456     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1457 	return -1;
1458 
1459     retval = get_tv_number_chk(&rettv, NULL);
1460     clear_tv(&rettv);
1461     return retval;
1462 }
1463 #endif
1464 
1465 /*
1466  * Call vimL function "func" and return the result as a list
1467  * Uses argv[argc] for the function arguments.
1468  */
1469     void *
1470 call_func_retlist(func, argc, argv, safe)
1471     char_u      *func;
1472     int		argc;
1473     char_u      **argv;
1474     int		safe;		/* use the sandbox */
1475 {
1476     typval_T	rettv;
1477 
1478     if (call_vim_function(func, argc, argv, safe, &rettv) == FAIL)
1479 	return NULL;
1480 
1481     if (rettv.v_type != VAR_LIST)
1482     {
1483 	clear_tv(&rettv);
1484 	return NULL;
1485     }
1486 
1487     return rettv.vval.v_list;
1488 }
1489 
1490 #endif
1491 
1492 /*
1493  * Save the current function call pointer, and set it to NULL.
1494  * Used when executing autocommands and for ":source".
1495  */
1496     void *
1497 save_funccal()
1498 {
1499     funccall_T *fc = current_funccal;
1500 
1501     current_funccal = NULL;
1502     return (void *)fc;
1503 }
1504 
1505     void
1506 restore_funccal(vfc)
1507     void *vfc;
1508 {
1509     funccall_T *fc = (funccall_T *)vfc;
1510 
1511     current_funccal = fc;
1512 }
1513 
1514 #if defined(FEAT_PROFILE) || defined(PROTO)
1515 /*
1516  * Prepare profiling for entering a child or something else that is not
1517  * counted for the script/function itself.
1518  * Should always be called in pair with prof_child_exit().
1519  */
1520     void
1521 prof_child_enter(tm)
1522     proftime_T *tm;	/* place to store waittime */
1523 {
1524     funccall_T *fc = current_funccal;
1525 
1526     if (fc != NULL && fc->func->uf_profiling)
1527 	profile_start(&fc->prof_child);
1528     script_prof_save(tm);
1529 }
1530 
1531 /*
1532  * Take care of time spent in a child.
1533  * Should always be called after prof_child_enter().
1534  */
1535     void
1536 prof_child_exit(tm)
1537     proftime_T *tm;	/* where waittime was stored */
1538 {
1539     funccall_T *fc = current_funccal;
1540 
1541     if (fc != NULL && fc->func->uf_profiling)
1542     {
1543 	profile_end(&fc->prof_child);
1544 	profile_sub_wait(tm, &fc->prof_child); /* don't count waiting time */
1545 	profile_add(&fc->func->uf_tm_children, &fc->prof_child);
1546 	profile_add(&fc->func->uf_tml_children, &fc->prof_child);
1547     }
1548     script_prof_restore(tm);
1549 }
1550 #endif
1551 
1552 
1553 #ifdef FEAT_FOLDING
1554 /*
1555  * Evaluate 'foldexpr'.  Returns the foldlevel, and any character preceding
1556  * it in "*cp".  Doesn't give error messages.
1557  */
1558     int
1559 eval_foldexpr(arg, cp)
1560     char_u	*arg;
1561     int		*cp;
1562 {
1563     typval_T	tv;
1564     int		retval;
1565     char_u	*s;
1566 
1567     ++emsg_off;
1568     ++sandbox;
1569     *cp = NUL;
1570     if (eval0(arg, &tv, NULL, TRUE) == FAIL)
1571 	retval = 0;
1572     else
1573     {
1574 	/* If the result is a number, just return the number. */
1575 	if (tv.v_type == VAR_NUMBER)
1576 	    retval = tv.vval.v_number;
1577 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
1578 	    retval = 0;
1579 	else
1580 	{
1581 	    /* If the result is a string, check if there is a non-digit before
1582 	     * the number. */
1583 	    s = tv.vval.v_string;
1584 	    if (!VIM_ISDIGIT(*s) && *s != '-')
1585 		*cp = *s++;
1586 	    retval = atol((char *)s);
1587 	}
1588 	clear_tv(&tv);
1589     }
1590     --emsg_off;
1591     --sandbox;
1592 
1593     return retval;
1594 }
1595 #endif
1596 
1597 /*
1598  * ":let"			list all variable values
1599  * ":let var1 var2"		list variable values
1600  * ":let var = expr"		assignment command.
1601  * ":let var += expr"		assignment command.
1602  * ":let var -= expr"		assignment command.
1603  * ":let var .= expr"		assignment command.
1604  * ":let [var1, var2] = expr"	unpack list.
1605  */
1606     void
1607 ex_let(eap)
1608     exarg_T	*eap;
1609 {
1610     char_u	*arg = eap->arg;
1611     char_u	*expr = NULL;
1612     typval_T	rettv;
1613     int		i;
1614     int		var_count = 0;
1615     int		semicolon = 0;
1616     char_u	op[2];
1617 
1618     expr = skip_var_list(arg, &var_count, &semicolon);
1619     if (expr == NULL)
1620 	return;
1621     expr = vim_strchr(expr, '=');
1622     if (expr == NULL)
1623     {
1624 	/*
1625 	 * ":let" without "=": list variables
1626 	 */
1627 	if (*arg == '[')
1628 	    EMSG(_(e_invarg));
1629 	else if (!ends_excmd(*arg))
1630 	    /* ":let var1 var2" */
1631 	    arg = list_arg_vars(eap, arg);
1632 	else if (!eap->skip)
1633 	{
1634 	    /* ":let" */
1635 	    list_glob_vars();
1636 	    list_buf_vars();
1637 	    list_win_vars();
1638 	    list_vim_vars();
1639 	}
1640 	eap->nextcmd = check_nextcmd(arg);
1641     }
1642     else
1643     {
1644 	op[0] = '=';
1645 	op[1] = NUL;
1646 	if (expr > arg)
1647 	{
1648 	    if (vim_strchr((char_u *)"+-.", expr[-1]) != NULL)
1649 		op[0] = expr[-1];   /* +=, -= or .= */
1650 	}
1651 	expr = skipwhite(expr + 1);
1652 
1653 	if (eap->skip)
1654 	    ++emsg_skip;
1655 	i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
1656 	if (eap->skip)
1657 	{
1658 	    if (i != FAIL)
1659 		clear_tv(&rettv);
1660 	    --emsg_skip;
1661 	}
1662 	else if (i != FAIL)
1663 	{
1664 	    (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
1665 									  op);
1666 	    clear_tv(&rettv);
1667 	}
1668     }
1669 }
1670 
1671 /*
1672  * Assign the typevalue "tv" to the variable or variables at "arg_start".
1673  * Handles both "var" with any type and "[var, var; var]" with a list type.
1674  * When "nextchars" is not NULL it points to a string with characters that
1675  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
1676  * or concatenate.
1677  * Returns OK or FAIL;
1678  */
1679     static int
1680 ex_let_vars(arg_start, tv, copy, semicolon, var_count, nextchars)
1681     char_u	*arg_start;
1682     typval_T	*tv;
1683     int		copy;		/* copy values from "tv", don't move */
1684     int		semicolon;	/* from skip_var_list() */
1685     int		var_count;	/* from skip_var_list() */
1686     char_u	*nextchars;
1687 {
1688     char_u	*arg = arg_start;
1689     list_T	*l;
1690     int		i;
1691     listitem_T	*item;
1692     typval_T	ltv;
1693 
1694     if (*arg != '[')
1695     {
1696 	/*
1697 	 * ":let var = expr" or ":for var in list"
1698 	 */
1699 	if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
1700 	    return FAIL;
1701 	return OK;
1702     }
1703 
1704     /*
1705      * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
1706      */
1707     if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
1708     {
1709 	EMSG(_(e_listreq));
1710 	return FAIL;
1711     }
1712 
1713     i = list_len(l);
1714     if (semicolon == 0 && var_count < i)
1715     {
1716 	EMSG(_("E687: Less targets than List items"));
1717 	return FAIL;
1718     }
1719     if (var_count - semicolon > i)
1720     {
1721 	EMSG(_("E688: More targets than List items"));
1722 	return FAIL;
1723     }
1724 
1725     item = l->lv_first;
1726     while (*arg != ']')
1727     {
1728 	arg = skipwhite(arg + 1);
1729 	arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
1730 	item = item->li_next;
1731 	if (arg == NULL)
1732 	    return FAIL;
1733 
1734 	arg = skipwhite(arg);
1735 	if (*arg == ';')
1736 	{
1737 	    /* Put the rest of the list (may be empty) in the var after ';'.
1738 	     * Create a new list for this. */
1739 	    l = list_alloc();
1740 	    if (l == NULL)
1741 		return FAIL;
1742 	    while (item != NULL)
1743 	    {
1744 		list_append_tv(l, &item->li_tv);
1745 		item = item->li_next;
1746 	    }
1747 
1748 	    ltv.v_type = VAR_LIST;
1749 	    ltv.v_lock = 0;
1750 	    ltv.vval.v_list = l;
1751 	    l->lv_refcount = 1;
1752 
1753 	    arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
1754 						    (char_u *)"]", nextchars);
1755 	    clear_tv(&ltv);
1756 	    if (arg == NULL)
1757 		return FAIL;
1758 	    break;
1759 	}
1760 	else if (*arg != ',' && *arg != ']')
1761 	{
1762 	    EMSG2(_(e_intern2), "ex_let_vars()");
1763 	    return FAIL;
1764 	}
1765     }
1766 
1767     return OK;
1768 }
1769 
1770 /*
1771  * Skip over assignable variable "var" or list of variables "[var, var]".
1772  * Used for ":let varvar = expr" and ":for varvar in expr".
1773  * For "[var, var]" increment "*var_count" for each variable.
1774  * for "[var, var; var]" set "semicolon".
1775  * Return NULL for an error.
1776  */
1777     static char_u *
1778 skip_var_list(arg, var_count, semicolon)
1779     char_u	*arg;
1780     int		*var_count;
1781     int		*semicolon;
1782 {
1783     char_u	*p, *s;
1784 
1785     if (*arg == '[')
1786     {
1787 	/* "[var, var]": find the matching ']'. */
1788 	p = arg;
1789 	for (;;)
1790 	{
1791 	    p = skipwhite(p + 1);	/* skip whites after '[', ';' or ',' */
1792 	    s = skip_var_one(p);
1793 	    if (s == p)
1794 	    {
1795 		EMSG2(_(e_invarg2), p);
1796 		return NULL;
1797 	    }
1798 	    ++*var_count;
1799 
1800 	    p = skipwhite(s);
1801 	    if (*p == ']')
1802 		break;
1803 	    else if (*p == ';')
1804 	    {
1805 		if (*semicolon == 1)
1806 		{
1807 		    EMSG(_("Double ; in list of variables"));
1808 		    return NULL;
1809 		}
1810 		*semicolon = 1;
1811 	    }
1812 	    else if (*p != ',')
1813 	    {
1814 		EMSG2(_(e_invarg2), p);
1815 		return NULL;
1816 	    }
1817 	}
1818 	return p + 1;
1819     }
1820     else
1821 	return skip_var_one(arg);
1822 }
1823 
1824 /*
1825  * Skip one (assignable) variable name, includig @r, $VAR, &option, d.key,
1826  * l[idx].
1827  */
1828     static char_u *
1829 skip_var_one(arg)
1830     char_u	*arg;
1831 {
1832     if (*arg == '@' && arg[1] != NUL)
1833 	return arg + 2;
1834     return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
1835 				   NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1836 }
1837 
1838 /*
1839  * List variables for hashtab "ht" with prefix "prefix".
1840  * If "empty" is TRUE also list NULL strings as empty strings.
1841  */
1842     static void
1843 list_hashtable_vars(ht, prefix, empty)
1844     hashtab_T	*ht;
1845     char_u	*prefix;
1846     int		empty;
1847 {
1848     hashitem_T	*hi;
1849     dictitem_T	*di;
1850     int		todo;
1851 
1852     todo = ht->ht_used;
1853     for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
1854     {
1855 	if (!HASHITEM_EMPTY(hi))
1856 	{
1857 	    --todo;
1858 	    di = HI2DI(hi);
1859 	    if (empty || di->di_tv.v_type != VAR_STRING
1860 					   || di->di_tv.vval.v_string != NULL)
1861 		list_one_var(di, prefix);
1862 	}
1863     }
1864 }
1865 
1866 /*
1867  * List global variables.
1868  */
1869     static void
1870 list_glob_vars()
1871 {
1872     list_hashtable_vars(&globvarht, (char_u *)"", TRUE);
1873 }
1874 
1875 /*
1876  * List buffer variables.
1877  */
1878     static void
1879 list_buf_vars()
1880 {
1881     char_u	numbuf[NUMBUFLEN];
1882 
1883     list_hashtable_vars(&curbuf->b_vars.dv_hashtab, (char_u *)"b:", TRUE);
1884 
1885     sprintf((char *)numbuf, "%ld", (long)curbuf->b_changedtick);
1886     list_one_var_a((char_u *)"b:", (char_u *)"changedtick", VAR_NUMBER, numbuf);
1887 }
1888 
1889 /*
1890  * List window variables.
1891  */
1892     static void
1893 list_win_vars()
1894 {
1895     list_hashtable_vars(&curwin->w_vars.dv_hashtab, (char_u *)"w:", TRUE);
1896 }
1897 
1898 /*
1899  * List Vim variables.
1900  */
1901     static void
1902 list_vim_vars()
1903 {
1904     list_hashtable_vars(&vimvarht, (char_u *)"v:", FALSE);
1905 }
1906 
1907 /*
1908  * List variables in "arg".
1909  */
1910     static char_u *
1911 list_arg_vars(eap, arg)
1912     exarg_T	*eap;
1913     char_u	*arg;
1914 {
1915     int		error = FALSE;
1916     int		len;
1917     char_u	*name;
1918     char_u	*name_start;
1919     char_u	*arg_subsc;
1920     char_u	*tofree;
1921     typval_T    tv;
1922 
1923     while (!ends_excmd(*arg) && !got_int)
1924     {
1925 	if (error || eap->skip)
1926 	{
1927 	    arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
1928 	    if (!vim_iswhite(*arg) && !ends_excmd(*arg))
1929 	    {
1930 		emsg_severe = TRUE;
1931 		EMSG(_(e_trailing));
1932 		break;
1933 	    }
1934 	}
1935 	else
1936 	{
1937 	    /* get_name_len() takes care of expanding curly braces */
1938 	    name_start = name = arg;
1939 	    len = get_name_len(&arg, &tofree, TRUE, TRUE);
1940 	    if (len <= 0)
1941 	    {
1942 		/* This is mainly to keep test 49 working: when expanding
1943 		 * curly braces fails overrule the exception error message. */
1944 		if (len < 0 && !aborting())
1945 		{
1946 		    emsg_severe = TRUE;
1947 		    EMSG2(_(e_invarg2), arg);
1948 		    break;
1949 		}
1950 		error = TRUE;
1951 	    }
1952 	    else
1953 	    {
1954 		if (tofree != NULL)
1955 		    name = tofree;
1956 		if (get_var_tv(name, len, &tv, TRUE) == FAIL)
1957 		    error = TRUE;
1958 		else
1959 		{
1960 		    /* handle d.key, l[idx], f(expr) */
1961 		    arg_subsc = arg;
1962 		    if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
1963 			error = TRUE;
1964 		    else
1965 		    {
1966 			if (arg == arg_subsc && len == 2 && name[1] == ':')
1967 			{
1968 			    switch (*name)
1969 			    {
1970 				case 'g': list_glob_vars(); break;
1971 				case 'b': list_buf_vars(); break;
1972 				case 'w': list_win_vars(); break;
1973 				case 'v': list_vim_vars(); break;
1974 				default:
1975 					  EMSG2(_("E738: Can't list variables for %s"), name);
1976 			    }
1977 			}
1978 			else
1979 			{
1980 			    char_u	numbuf[NUMBUFLEN];
1981 			    char_u	*tf;
1982 			    int		c;
1983 			    char_u	*s;
1984 
1985 			    s = echo_string(&tv, &tf, numbuf);
1986 			    c = *arg;
1987 			    *arg = NUL;
1988 			    list_one_var_a((char_u *)"",
1989 				    arg == arg_subsc ? name : name_start,
1990 				    tv.v_type, s == NULL ? (char_u *)"" : s);
1991 			    *arg = c;
1992 			    vim_free(tf);
1993 			}
1994 			clear_tv(&tv);
1995 		    }
1996 		}
1997 	    }
1998 
1999 	    vim_free(tofree);
2000 	}
2001 
2002 	arg = skipwhite(arg);
2003     }
2004 
2005     return arg;
2006 }
2007 
2008 /*
2009  * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
2010  * Returns a pointer to the char just after the var name.
2011  * Returns NULL if there is an error.
2012  */
2013     static char_u *
2014 ex_let_one(arg, tv, copy, endchars, op)
2015     char_u	*arg;		/* points to variable name */
2016     typval_T	*tv;		/* value to assign to variable */
2017     int		copy;		/* copy value from "tv" */
2018     char_u	*endchars;	/* valid chars after variable name  or NULL */
2019     char_u	*op;		/* "+", "-", "."  or NULL*/
2020 {
2021     int		c1;
2022     char_u	*name;
2023     char_u	*p;
2024     char_u	*arg_end = NULL;
2025     int		len;
2026     int		opt_flags;
2027     char_u	*tofree = NULL;
2028 
2029     /*
2030      * ":let $VAR = expr": Set environment variable.
2031      */
2032     if (*arg == '$')
2033     {
2034 	/* Find the end of the name. */
2035 	++arg;
2036 	name = arg;
2037 	len = get_env_len(&arg);
2038 	if (len == 0)
2039 	    EMSG2(_(e_invarg2), name - 1);
2040 	else
2041 	{
2042 	    if (op != NULL && (*op == '+' || *op == '-'))
2043 		EMSG2(_(e_letwrong), op);
2044 	    else if (endchars != NULL
2045 			     && vim_strchr(endchars, *skipwhite(arg)) == NULL)
2046 		EMSG(_(e_letunexp));
2047 	    else
2048 	    {
2049 		c1 = name[len];
2050 		name[len] = NUL;
2051 		p = get_tv_string_chk(tv);
2052 		if (p != NULL && op != NULL && *op == '.')
2053 		{
2054 		    int	    mustfree = FALSE;
2055 		    char_u  *s = vim_getenv(name, &mustfree);
2056 
2057 		    if (s != NULL)
2058 		    {
2059 			p = tofree = concat_str(s, p);
2060 			if (mustfree)
2061 			    vim_free(s);
2062 		    }
2063 		}
2064 		if (p != NULL)
2065 		{
2066 		    vim_setenv(name, p);
2067 		    if (STRICMP(name, "HOME") == 0)
2068 			init_homedir();
2069 		    else if (didset_vim && STRICMP(name, "VIM") == 0)
2070 			didset_vim = FALSE;
2071 		    else if (didset_vimruntime
2072 					&& STRICMP(name, "VIMRUNTIME") == 0)
2073 			didset_vimruntime = FALSE;
2074 		    arg_end = arg;
2075 		}
2076 		name[len] = c1;
2077 		vim_free(tofree);
2078 	    }
2079 	}
2080     }
2081 
2082     /*
2083      * ":let &option = expr": Set option value.
2084      * ":let &l:option = expr": Set local option value.
2085      * ":let &g:option = expr": Set global option value.
2086      */
2087     else if (*arg == '&')
2088     {
2089 	/* Find the end of the name. */
2090 	p = find_option_end(&arg, &opt_flags);
2091 	if (p == NULL || (endchars != NULL
2092 			      && vim_strchr(endchars, *skipwhite(p)) == NULL))
2093 	    EMSG(_(e_letunexp));
2094 	else
2095 	{
2096 	    long	n;
2097 	    int		opt_type;
2098 	    long	numval;
2099 	    char_u	*stringval = NULL;
2100 	    char_u	*s;
2101 
2102 	    c1 = *p;
2103 	    *p = NUL;
2104 
2105 	    n = get_tv_number(tv);
2106 	    s = get_tv_string_chk(tv);	    /* != NULL if number or string */
2107 	    if (s != NULL && op != NULL && *op != '=')
2108 	    {
2109 		opt_type = get_option_value(arg, &numval,
2110 						       &stringval, opt_flags);
2111 		if ((opt_type == 1 && *op == '.')
2112 			|| (opt_type == 0 && *op != '.'))
2113 		    EMSG2(_(e_letwrong), op);
2114 		else
2115 		{
2116 		    if (opt_type == 1)  /* number */
2117 		    {
2118 			if (*op == '+')
2119 			    n = numval + n;
2120 			else
2121 			    n = numval - n;
2122 		    }
2123 		    else if (opt_type == 0 && stringval != NULL) /* string */
2124 		    {
2125 			s = concat_str(stringval, s);
2126 			vim_free(stringval);
2127 			stringval = s;
2128 		    }
2129 		}
2130 	    }
2131 	    if (s != NULL)
2132 	    {
2133 		set_option_value(arg, n, s, opt_flags);
2134 		arg_end = p;
2135 	    }
2136 	    *p = c1;
2137 	    vim_free(stringval);
2138 	}
2139     }
2140 
2141     /*
2142      * ":let @r = expr": Set register contents.
2143      */
2144     else if (*arg == '@')
2145     {
2146 	++arg;
2147 	if (op != NULL && (*op == '+' || *op == '-'))
2148 	    EMSG2(_(e_letwrong), op);
2149 	else if (endchars != NULL
2150 			 && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
2151 	    EMSG(_(e_letunexp));
2152 	else
2153 	{
2154 	    char_u	*tofree = NULL;
2155 	    char_u	*s;
2156 
2157 	    p = get_tv_string_chk(tv);
2158 	    if (p != NULL && op != NULL && *op == '.')
2159 	    {
2160 		s = get_reg_contents(*arg == '@' ? '"' : *arg, TRUE, TRUE);
2161 		if (s != NULL)
2162 		{
2163 		    p = tofree = concat_str(s, p);
2164 		    vim_free(s);
2165 		}
2166 	    }
2167 	    if (p != NULL)
2168 	    {
2169 		write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
2170 		arg_end = arg + 1;
2171 	    }
2172 	    vim_free(tofree);
2173 	}
2174     }
2175 
2176     /*
2177      * ":let var = expr": Set internal variable.
2178      * ":let {expr} = expr": Idem, name made with curly braces
2179      */
2180     else if (eval_isnamec1(*arg) || *arg == '{')
2181     {
2182 	lval_T	lv;
2183 
2184 	p = get_lval(arg, tv, &lv, FALSE, FALSE, FALSE, FNE_CHECK_START);
2185 	if (p != NULL && lv.ll_name != NULL)
2186 	{
2187 	    if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
2188 		EMSG(_(e_letunexp));
2189 	    else
2190 	    {
2191 		set_var_lval(&lv, p, tv, copy, op);
2192 		arg_end = p;
2193 	    }
2194 	}
2195 	clear_lval(&lv);
2196     }
2197 
2198     else
2199 	EMSG2(_(e_invarg2), arg);
2200 
2201     return arg_end;
2202 }
2203 
2204 /*
2205  * If "arg" is equal to "b:changedtick" give an error and return TRUE.
2206  */
2207     static int
2208 check_changedtick(arg)
2209     char_u	*arg;
2210 {
2211     if (STRNCMP(arg, "b:changedtick", 13) == 0 && !eval_isnamec(arg[13]))
2212     {
2213 	EMSG2(_(e_readonlyvar), arg);
2214 	return TRUE;
2215     }
2216     return FALSE;
2217 }
2218 
2219 /*
2220  * Get an lval: variable, Dict item or List item that can be assigned a value
2221  * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
2222  * "name.key", "name.key[expr]" etc.
2223  * Indexing only works if "name" is an existing List or Dictionary.
2224  * "name" points to the start of the name.
2225  * If "rettv" is not NULL it points to the value to be assigned.
2226  * "unlet" is TRUE for ":unlet": slightly different behavior when something is
2227  * wrong; must end in space or cmd separator.
2228  *
2229  * Returns a pointer to just after the name, including indexes.
2230  * When an evaluation error occurs "lp->ll_name" is NULL;
2231  * Returns NULL for a parsing error.  Still need to free items in "lp"!
2232  */
2233     static char_u *
2234 get_lval(name, rettv, lp, unlet, skip, quiet, fne_flags)
2235     char_u	*name;
2236     typval_T	*rettv;
2237     lval_T	*lp;
2238     int		unlet;
2239     int		skip;
2240     int		quiet;	    /* don't give error messages */
2241     int		fne_flags;  /* flags for find_name_end() */
2242 {
2243     char_u	*p;
2244     char_u	*expr_start, *expr_end;
2245     int		cc;
2246     dictitem_T	*v;
2247     typval_T	var1;
2248     typval_T	var2;
2249     int		empty1 = FALSE;
2250     listitem_T	*ni;
2251     char_u	*key = NULL;
2252     int		len;
2253     hashtab_T	*ht;
2254 
2255     /* Clear everything in "lp". */
2256     vim_memset(lp, 0, sizeof(lval_T));
2257 
2258     if (skip)
2259     {
2260 	/* When skipping just find the end of the name. */
2261 	lp->ll_name = name;
2262 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
2263     }
2264 
2265     /* Find the end of the name. */
2266     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
2267     if (expr_start != NULL)
2268     {
2269 	/* Don't expand the name when we already know there is an error. */
2270 	if (unlet && !vim_iswhite(*p) && !ends_excmd(*p)
2271 						    && *p != '[' && *p != '.')
2272 	{
2273 	    EMSG(_(e_trailing));
2274 	    return NULL;
2275 	}
2276 
2277 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
2278 	if (lp->ll_exp_name == NULL)
2279 	{
2280 	    /* Report an invalid expression in braces, unless the
2281 	     * expression evaluation has been cancelled due to an
2282 	     * aborting error, an interrupt, or an exception. */
2283 	    if (!aborting() && !quiet)
2284 	    {
2285 		emsg_severe = TRUE;
2286 		EMSG2(_(e_invarg2), name);
2287 		return NULL;
2288 	    }
2289 	}
2290 	lp->ll_name = lp->ll_exp_name;
2291     }
2292     else
2293 	lp->ll_name = name;
2294 
2295     /* Without [idx] or .key we are done. */
2296     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
2297 	return p;
2298 
2299     cc = *p;
2300     *p = NUL;
2301     v = find_var(lp->ll_name, &ht);
2302     if (v == NULL && !quiet)
2303 	EMSG2(_(e_undefvar), lp->ll_name);
2304     *p = cc;
2305     if (v == NULL)
2306 	return NULL;
2307 
2308     /*
2309      * Loop until no more [idx] or .key is following.
2310      */
2311     lp->ll_tv = &v->di_tv;
2312     while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
2313     {
2314 	if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
2315 		&& !(lp->ll_tv->v_type == VAR_DICT
2316 					   && lp->ll_tv->vval.v_dict != NULL))
2317 	{
2318 	    if (!quiet)
2319 		EMSG(_("E689: Can only index a List or Dictionary"));
2320 	    return NULL;
2321 	}
2322 	if (lp->ll_range)
2323 	{
2324 	    if (!quiet)
2325 		EMSG(_("E708: [:] must come last"));
2326 	    return NULL;
2327 	}
2328 
2329 	len = -1;
2330 	if (*p == '.')
2331 	{
2332 	    key = p + 1;
2333 	    for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
2334 		;
2335 	    if (len == 0)
2336 	    {
2337 		if (!quiet)
2338 		    EMSG(_(e_emptykey));
2339 		return NULL;
2340 	    }
2341 	    p = key + len;
2342 	}
2343 	else
2344 	{
2345 	    /* Get the index [expr] or the first index [expr: ]. */
2346 	    p = skipwhite(p + 1);
2347 	    if (*p == ':')
2348 		empty1 = TRUE;
2349 	    else
2350 	    {
2351 		empty1 = FALSE;
2352 		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
2353 		    return NULL;
2354 		if (get_tv_string_chk(&var1) == NULL)
2355 		{
2356 		    /* not a number or string */
2357 		    clear_tv(&var1);
2358 		    return NULL;
2359 		}
2360 	    }
2361 
2362 	    /* Optionally get the second index [ :expr]. */
2363 	    if (*p == ':')
2364 	    {
2365 		if (lp->ll_tv->v_type == VAR_DICT)
2366 		{
2367 		    if (!quiet)
2368 			EMSG(_(e_dictrange));
2369 		    if (!empty1)
2370 			clear_tv(&var1);
2371 		    return NULL;
2372 		}
2373 		if (rettv != NULL && (rettv->v_type != VAR_LIST
2374 					       || rettv->vval.v_list == NULL))
2375 		{
2376 		    if (!quiet)
2377 			EMSG(_("E709: [:] requires a List value"));
2378 		    if (!empty1)
2379 			clear_tv(&var1);
2380 		    return NULL;
2381 		}
2382 		p = skipwhite(p + 1);
2383 		if (*p == ']')
2384 		    lp->ll_empty2 = TRUE;
2385 		else
2386 		{
2387 		    lp->ll_empty2 = FALSE;
2388 		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
2389 		    {
2390 			if (!empty1)
2391 			    clear_tv(&var1);
2392 			return NULL;
2393 		    }
2394 		    if (get_tv_string_chk(&var2) == NULL)
2395 		    {
2396 			/* not a number or string */
2397 			if (!empty1)
2398 			    clear_tv(&var1);
2399 			clear_tv(&var2);
2400 			return NULL;
2401 		    }
2402 		}
2403 		lp->ll_range = TRUE;
2404 	    }
2405 	    else
2406 		lp->ll_range = FALSE;
2407 
2408 	    if (*p != ']')
2409 	    {
2410 		if (!quiet)
2411 		    EMSG(_(e_missbrac));
2412 		if (!empty1)
2413 		    clear_tv(&var1);
2414 		if (lp->ll_range && !lp->ll_empty2)
2415 		    clear_tv(&var2);
2416 		return NULL;
2417 	    }
2418 
2419 	    /* Skip to past ']'. */
2420 	    ++p;
2421 	}
2422 
2423 	if (lp->ll_tv->v_type == VAR_DICT)
2424 	{
2425 	    if (len == -1)
2426 	    {
2427 		/* "[key]": get key from "var1" */
2428 		key = get_tv_string(&var1);	/* is number or string */
2429 		if (*key == NUL)
2430 		{
2431 		    if (!quiet)
2432 			EMSG(_(e_emptykey));
2433 		    clear_tv(&var1);
2434 		    return NULL;
2435 		}
2436 	    }
2437 	    lp->ll_list = NULL;
2438 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
2439 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
2440 	    if (lp->ll_di == NULL)
2441 	    {
2442 		/* Key does not exist in dict: may need to add it. */
2443 		if (*p == '[' || *p == '.' || unlet)
2444 		{
2445 		    if (!quiet)
2446 			EMSG2(_(e_dictkey), key);
2447 		    if (len == -1)
2448 			clear_tv(&var1);
2449 		    return NULL;
2450 		}
2451 		if (len == -1)
2452 		    lp->ll_newkey = vim_strsave(key);
2453 		else
2454 		    lp->ll_newkey = vim_strnsave(key, len);
2455 		if (len == -1)
2456 		    clear_tv(&var1);
2457 		if (lp->ll_newkey == NULL)
2458 		    p = NULL;
2459 		break;
2460 	    }
2461 	    if (len == -1)
2462 		clear_tv(&var1);
2463 	    lp->ll_tv = &lp->ll_di->di_tv;
2464 	}
2465 	else
2466 	{
2467 	    /*
2468 	     * Get the number and item for the only or first index of the List.
2469 	     */
2470 	    if (empty1)
2471 		lp->ll_n1 = 0;
2472 	    else
2473 	    {
2474 		lp->ll_n1 = get_tv_number(&var1);   /* is number or string */
2475 		clear_tv(&var1);
2476 	    }
2477 	    lp->ll_dict = NULL;
2478 	    lp->ll_list = lp->ll_tv->vval.v_list;
2479 	    lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
2480 	    if (lp->ll_li == NULL)
2481 	    {
2482 		if (!quiet)
2483 		    EMSGN(_(e_listidx), lp->ll_n1);
2484 		if (lp->ll_range && !lp->ll_empty2)
2485 		    clear_tv(&var2);
2486 		return NULL;
2487 	    }
2488 
2489 	    /*
2490 	     * May need to find the item or absolute index for the second
2491 	     * index of a range.
2492 	     * When no index given: "lp->ll_empty2" is TRUE.
2493 	     * Otherwise "lp->ll_n2" is set to the second index.
2494 	     */
2495 	    if (lp->ll_range && !lp->ll_empty2)
2496 	    {
2497 		lp->ll_n2 = get_tv_number(&var2);   /* is number or string */
2498 		clear_tv(&var2);
2499 		if (lp->ll_n2 < 0)
2500 		{
2501 		    ni = list_find(lp->ll_list, lp->ll_n2);
2502 		    if (ni == NULL)
2503 		    {
2504 			if (!quiet)
2505 			    EMSGN(_(e_listidx), lp->ll_n2);
2506 			return NULL;
2507 		    }
2508 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
2509 		}
2510 
2511 		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
2512 		if (lp->ll_n1 < 0)
2513 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
2514 		if (lp->ll_n2 < lp->ll_n1)
2515 		{
2516 		    if (!quiet)
2517 			EMSGN(_(e_listidx), lp->ll_n2);
2518 		    return NULL;
2519 		}
2520 	    }
2521 
2522 	    lp->ll_tv = &lp->ll_li->li_tv;
2523 	}
2524     }
2525 
2526     return p;
2527 }
2528 
2529 /*
2530  * Clear lval "lp" that was filled by get_lval().
2531  */
2532     static void
2533 clear_lval(lp)
2534     lval_T	*lp;
2535 {
2536     vim_free(lp->ll_exp_name);
2537     vim_free(lp->ll_newkey);
2538 }
2539 
2540 /*
2541  * Set a variable that was parsed by get_lval() to "rettv".
2542  * "endp" points to just after the parsed name.
2543  * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
2544  */
2545     static void
2546 set_var_lval(lp, endp, rettv, copy, op)
2547     lval_T	*lp;
2548     char_u	*endp;
2549     typval_T	*rettv;
2550     int		copy;
2551     char_u	*op;
2552 {
2553     int		cc;
2554     listitem_T	*ni;
2555     listitem_T	*ri;
2556     dictitem_T	*di;
2557 
2558     if (lp->ll_tv == NULL)
2559     {
2560 	if (!check_changedtick(lp->ll_name))
2561 	{
2562 	    cc = *endp;
2563 	    *endp = NUL;
2564 	    if (op != NULL && *op != '=')
2565 	    {
2566 		typval_T tv;
2567 
2568 		/* handle +=, -= and .= */
2569 		if (get_var_tv(lp->ll_name, STRLEN(lp->ll_name),
2570 							     &tv, TRUE) == OK)
2571 		{
2572 		    if (tv_op(&tv, rettv, op) == OK)
2573 			set_var(lp->ll_name, &tv, FALSE);
2574 		    clear_tv(&tv);
2575 		}
2576 	    }
2577 	    else
2578 		set_var(lp->ll_name, rettv, copy);
2579 	    *endp = cc;
2580 	}
2581     }
2582     else if (tv_check_lock(lp->ll_newkey == NULL
2583 		? lp->ll_tv->v_lock
2584 		: lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name))
2585 	;
2586     else if (lp->ll_range)
2587     {
2588 	/*
2589 	 * Assign the List values to the list items.
2590 	 */
2591 	for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
2592 	{
2593 	    if (op != NULL && *op != '=')
2594 		tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
2595 	    else
2596 	    {
2597 		clear_tv(&lp->ll_li->li_tv);
2598 		copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
2599 	    }
2600 	    ri = ri->li_next;
2601 	    if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
2602 		break;
2603 	    if (lp->ll_li->li_next == NULL)
2604 	    {
2605 		/* Need to add an empty item. */
2606 		ni = listitem_alloc();
2607 		if (ni == NULL)
2608 		{
2609 		    ri = NULL;
2610 		    break;
2611 		}
2612 		ni->li_tv.v_type = VAR_NUMBER;
2613 		ni->li_tv.v_lock = 0;
2614 		ni->li_tv.vval.v_number = 0;
2615 		list_append(lp->ll_list, ni);
2616 	    }
2617 	    lp->ll_li = lp->ll_li->li_next;
2618 	    ++lp->ll_n1;
2619 	}
2620 	if (ri != NULL)
2621 	    EMSG(_("E710: List value has more items than target"));
2622 	else if (lp->ll_empty2
2623 		? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
2624 		: lp->ll_n1 != lp->ll_n2)
2625 	    EMSG(_("E711: List value has not enough items"));
2626     }
2627     else
2628     {
2629 	/*
2630 	 * Assign to a List or Dictionary item.
2631 	 */
2632 	if (lp->ll_newkey != NULL)
2633 	{
2634 	    if (op != NULL && *op != '=')
2635 	    {
2636 		EMSG2(_(e_letwrong), op);
2637 		return;
2638 	    }
2639 
2640 	    /* Need to add an item to the Dictionary. */
2641 	    di = dictitem_alloc(lp->ll_newkey);
2642 	    if (di == NULL)
2643 		return;
2644 	    if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
2645 	    {
2646 		vim_free(di);
2647 		return;
2648 	    }
2649 	    lp->ll_tv = &di->di_tv;
2650 	}
2651 	else if (op != NULL && *op != '=')
2652 	{
2653 	    tv_op(lp->ll_tv, rettv, op);
2654 	    return;
2655 	}
2656 	else
2657 	    clear_tv(lp->ll_tv);
2658 
2659 	/*
2660 	 * Assign the value to the variable or list item.
2661 	 */
2662 	if (copy)
2663 	    copy_tv(rettv, lp->ll_tv);
2664 	else
2665 	{
2666 	    *lp->ll_tv = *rettv;
2667 	    lp->ll_tv->v_lock = 0;
2668 	    init_tv(rettv);
2669 	}
2670     }
2671 }
2672 
2673 /*
2674  * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
2675  * Returns OK or FAIL.
2676  */
2677     static int
2678 tv_op(tv1, tv2, op)
2679     typval_T *tv1;
2680     typval_T *tv2;
2681     char_u  *op;
2682 {
2683     long	n;
2684     char_u	numbuf[NUMBUFLEN];
2685     char_u	*s;
2686 
2687     /* Can't do anything with a Funcref or a Dict on the right. */
2688     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT)
2689     {
2690 	switch (tv1->v_type)
2691 	{
2692 	    case VAR_DICT:
2693 	    case VAR_FUNC:
2694 		break;
2695 
2696 	    case VAR_LIST:
2697 		if (*op != '+' || tv2->v_type != VAR_LIST)
2698 		    break;
2699 		/* List += List */
2700 		if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
2701 		    list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
2702 		return OK;
2703 
2704 	    case VAR_NUMBER:
2705 	    case VAR_STRING:
2706 		if (tv2->v_type == VAR_LIST)
2707 		    break;
2708 		if (*op == '+' || *op == '-')
2709 		{
2710 		    /* nr += nr  or  nr -= nr*/
2711 		    n = get_tv_number(tv1);
2712 		    if (*op == '+')
2713 			n += get_tv_number(tv2);
2714 		    else
2715 			n -= get_tv_number(tv2);
2716 		    clear_tv(tv1);
2717 		    tv1->v_type = VAR_NUMBER;
2718 		    tv1->vval.v_number = n;
2719 		}
2720 		else
2721 		{
2722 		    /* str .= str */
2723 		    s = get_tv_string(tv1);
2724 		    s = concat_str(s, get_tv_string_buf(tv2, numbuf));
2725 		    clear_tv(tv1);
2726 		    tv1->v_type = VAR_STRING;
2727 		    tv1->vval.v_string = s;
2728 		}
2729 		return OK;
2730 	}
2731     }
2732 
2733     EMSG2(_(e_letwrong), op);
2734     return FAIL;
2735 }
2736 
2737 /*
2738  * Add a watcher to a list.
2739  */
2740     static void
2741 list_add_watch(l, lw)
2742     list_T	*l;
2743     listwatch_T	*lw;
2744 {
2745     lw->lw_next = l->lv_watch;
2746     l->lv_watch = lw;
2747 }
2748 
2749 /*
2750  * Remove a watcher from a list.
2751  * No warning when it isn't found...
2752  */
2753     static void
2754 list_rem_watch(l, lwrem)
2755     list_T	*l;
2756     listwatch_T	*lwrem;
2757 {
2758     listwatch_T	*lw, **lwp;
2759 
2760     lwp = &l->lv_watch;
2761     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2762     {
2763 	if (lw == lwrem)
2764 	{
2765 	    *lwp = lw->lw_next;
2766 	    break;
2767 	}
2768 	lwp = &lw->lw_next;
2769     }
2770 }
2771 
2772 /*
2773  * Just before removing an item from a list: advance watchers to the next
2774  * item.
2775  */
2776     static void
2777 list_fix_watch(l, item)
2778     list_T	*l;
2779     listitem_T	*item;
2780 {
2781     listwatch_T	*lw;
2782 
2783     for (lw = l->lv_watch; lw != NULL; lw = lw->lw_next)
2784 	if (lw->lw_item == item)
2785 	    lw->lw_item = item->li_next;
2786 }
2787 
2788 /*
2789  * Evaluate the expression used in a ":for var in expr" command.
2790  * "arg" points to "var".
2791  * Set "*errp" to TRUE for an error, FALSE otherwise;
2792  * Return a pointer that holds the info.  Null when there is an error.
2793  */
2794     void *
2795 eval_for_line(arg, errp, nextcmdp, skip)
2796     char_u	*arg;
2797     int		*errp;
2798     char_u	**nextcmdp;
2799     int		skip;
2800 {
2801     forinfo_T	*fi;
2802     char_u	*expr;
2803     typval_T	tv;
2804     list_T	*l;
2805 
2806     *errp = TRUE;	/* default: there is an error */
2807 
2808     fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
2809     if (fi == NULL)
2810 	return NULL;
2811 
2812     expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
2813     if (expr == NULL)
2814 	return fi;
2815 
2816     expr = skipwhite(expr);
2817     if (expr[0] != 'i' || expr[1] != 'n' || !vim_iswhite(expr[2]))
2818     {
2819 	EMSG(_("E690: Missing \"in\" after :for"));
2820 	return fi;
2821     }
2822 
2823     if (skip)
2824 	++emsg_skip;
2825     if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
2826     {
2827 	*errp = FALSE;
2828 	if (!skip)
2829 	{
2830 	    l = tv.vval.v_list;
2831 	    if (tv.v_type != VAR_LIST || l == NULL)
2832 	    {
2833 		EMSG(_(e_listreq));
2834 		clear_tv(&tv);
2835 	    }
2836 	    else
2837 	    {
2838 		/* No need to increment the refcount, it's already set for the
2839 		 * list being used in "tv". */
2840 		fi->fi_list = l;
2841 		list_add_watch(l, &fi->fi_lw);
2842 		fi->fi_lw.lw_item = l->lv_first;
2843 	    }
2844 	}
2845     }
2846     if (skip)
2847 	--emsg_skip;
2848 
2849     return fi;
2850 }
2851 
2852 /*
2853  * Use the first item in a ":for" list.  Advance to the next.
2854  * Assign the values to the variable (list).  "arg" points to the first one.
2855  * Return TRUE when a valid item was found, FALSE when at end of list or
2856  * something wrong.
2857  */
2858     int
2859 next_for_item(fi_void, arg)
2860     void	*fi_void;
2861     char_u	*arg;
2862 {
2863     forinfo_T    *fi = (forinfo_T *)fi_void;
2864     int		result;
2865     listitem_T	*item;
2866 
2867     item = fi->fi_lw.lw_item;
2868     if (item == NULL)
2869 	result = FALSE;
2870     else
2871     {
2872 	fi->fi_lw.lw_item = item->li_next;
2873 	result = (ex_let_vars(arg, &item->li_tv, TRUE,
2874 			      fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
2875     }
2876     return result;
2877 }
2878 
2879 /*
2880  * Free the structure used to store info used by ":for".
2881  */
2882     void
2883 free_for_info(fi_void)
2884     void *fi_void;
2885 {
2886     forinfo_T    *fi = (forinfo_T *)fi_void;
2887 
2888     if (fi != NULL && fi->fi_list != NULL)
2889     {
2890 	list_rem_watch(fi->fi_list, &fi->fi_lw);
2891 	list_unref(fi->fi_list);
2892     }
2893     vim_free(fi);
2894 }
2895 
2896 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
2897 
2898     void
2899 set_context_for_expression(xp, arg, cmdidx)
2900     expand_T	*xp;
2901     char_u	*arg;
2902     cmdidx_T	cmdidx;
2903 {
2904     int		got_eq = FALSE;
2905     int		c;
2906     char_u	*p;
2907 
2908     if (cmdidx == CMD_let)
2909     {
2910 	xp->xp_context = EXPAND_USER_VARS;
2911 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
2912 	{
2913 	    /* ":let var1 var2 ...": find last space. */
2914 	    for (p = arg + STRLEN(arg); p >= arg; )
2915 	    {
2916 		xp->xp_pattern = p;
2917 		mb_ptr_back(arg, p);
2918 		if (vim_iswhite(*p))
2919 		    break;
2920 	    }
2921 	    return;
2922 	}
2923     }
2924     else
2925 	xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
2926 							  : EXPAND_EXPRESSION;
2927     while ((xp->xp_pattern = vim_strpbrk(arg,
2928 				  (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
2929     {
2930 	c = *xp->xp_pattern;
2931 	if (c == '&')
2932 	{
2933 	    c = xp->xp_pattern[1];
2934 	    if (c == '&')
2935 	    {
2936 		++xp->xp_pattern;
2937 		xp->xp_context = cmdidx != CMD_let || got_eq
2938 					 ? EXPAND_EXPRESSION : EXPAND_NOTHING;
2939 	    }
2940 	    else if (c != ' ')
2941 	    {
2942 		xp->xp_context = EXPAND_SETTINGS;
2943 		if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
2944 		    xp->xp_pattern += 2;
2945 
2946 	    }
2947 	}
2948 	else if (c == '$')
2949 	{
2950 	    /* environment variable */
2951 	    xp->xp_context = EXPAND_ENV_VARS;
2952 	}
2953 	else if (c == '=')
2954 	{
2955 	    got_eq = TRUE;
2956 	    xp->xp_context = EXPAND_EXPRESSION;
2957 	}
2958 	else if (c == '<'
2959 		&& xp->xp_context == EXPAND_FUNCTIONS
2960 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
2961 	{
2962 	    /* Function name can start with "<SNR>" */
2963 	    break;
2964 	}
2965 	else if (cmdidx != CMD_let || got_eq)
2966 	{
2967 	    if (c == '"')	    /* string */
2968 	    {
2969 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
2970 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
2971 			++xp->xp_pattern;
2972 		xp->xp_context = EXPAND_NOTHING;
2973 	    }
2974 	    else if (c == '\'')	    /* literal string */
2975 	    {
2976 		/* Trick: '' is like stopping and starting a literal string. */
2977 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
2978 		    /* skip */ ;
2979 		xp->xp_context = EXPAND_NOTHING;
2980 	    }
2981 	    else if (c == '|')
2982 	    {
2983 		if (xp->xp_pattern[1] == '|')
2984 		{
2985 		    ++xp->xp_pattern;
2986 		    xp->xp_context = EXPAND_EXPRESSION;
2987 		}
2988 		else
2989 		    xp->xp_context = EXPAND_COMMANDS;
2990 	    }
2991 	    else
2992 		xp->xp_context = EXPAND_EXPRESSION;
2993 	}
2994 	else
2995 	    /* Doesn't look like something valid, expand as an expression
2996 	     * anyway. */
2997 	    xp->xp_context = EXPAND_EXPRESSION;
2998 	arg = xp->xp_pattern;
2999 	if (*arg != NUL)
3000 	    while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
3001 		/* skip */ ;
3002     }
3003     xp->xp_pattern = arg;
3004 }
3005 
3006 #endif /* FEAT_CMDL_COMPL */
3007 
3008 /*
3009  * ":1,25call func(arg1, arg2)"	function call.
3010  */
3011     void
3012 ex_call(eap)
3013     exarg_T	*eap;
3014 {
3015     char_u	*arg = eap->arg;
3016     char_u	*startarg;
3017     char_u	*name;
3018     char_u	*tofree;
3019     int		len;
3020     typval_T	rettv;
3021     linenr_T	lnum;
3022     int		doesrange;
3023     int		failed = FALSE;
3024     funcdict_T	fudi;
3025 
3026     tofree = trans_function_name(&arg, eap->skip, TFN_INT, &fudi);
3027     vim_free(fudi.fd_newkey);
3028     if (tofree == NULL)
3029 	return;
3030 
3031     /* Increase refcount on dictionary, it could get deleted when evaluating
3032      * the arguments. */
3033     if (fudi.fd_dict != NULL)
3034 	++fudi.fd_dict->dv_refcount;
3035 
3036     /* If it is the name of a variable of type VAR_FUNC use its contents. */
3037     len = STRLEN(tofree);
3038     name = deref_func_name(tofree, &len);
3039 
3040     /* Skip white space to allow ":call func ()".  Not good, but required for
3041      * backward compatibility. */
3042     startarg = skipwhite(arg);
3043     rettv.v_type = VAR_UNKNOWN;	/* clear_tv() uses this */
3044 
3045     if (*startarg != '(')
3046     {
3047 	EMSG2(_("E107: Missing braces: %s"), eap->arg);
3048 	goto end;
3049     }
3050 
3051     /*
3052      * When skipping, evaluate the function once, to find the end of the
3053      * arguments.
3054      * When the function takes a range, this is discovered after the first
3055      * call, and the loop is broken.
3056      */
3057     if (eap->skip)
3058     {
3059 	++emsg_skip;
3060 	lnum = eap->line2;	/* do it once, also with an invalid range */
3061     }
3062     else
3063 	lnum = eap->line1;
3064     for ( ; lnum <= eap->line2; ++lnum)
3065     {
3066 	if (!eap->skip && eap->addr_count > 0)
3067 	{
3068 	    curwin->w_cursor.lnum = lnum;
3069 	    curwin->w_cursor.col = 0;
3070 	}
3071 	arg = startarg;
3072 	if (get_func_tv(name, STRLEN(name), &rettv, &arg,
3073 		    eap->line1, eap->line2, &doesrange,
3074 					    !eap->skip, fudi.fd_dict) == FAIL)
3075 	{
3076 	    failed = TRUE;
3077 	    break;
3078 	}
3079 	clear_tv(&rettv);
3080 	if (doesrange || eap->skip)
3081 	    break;
3082 	/* Stop when immediately aborting on error, or when an interrupt
3083 	 * occurred or an exception was thrown but not caught.
3084 	 * get_func_tv() returned OK, so that the check for trailing
3085 	 * characters below is executed. */
3086 	if (aborting())
3087 	    break;
3088     }
3089     if (eap->skip)
3090 	--emsg_skip;
3091 
3092     if (!failed)
3093     {
3094 	/* Check for trailing illegal characters and a following command. */
3095 	if (!ends_excmd(*arg))
3096 	{
3097 	    emsg_severe = TRUE;
3098 	    EMSG(_(e_trailing));
3099 	}
3100 	else
3101 	    eap->nextcmd = check_nextcmd(arg);
3102     }
3103 
3104 end:
3105     dict_unref(fudi.fd_dict);
3106     vim_free(tofree);
3107 }
3108 
3109 /*
3110  * ":unlet[!] var1 ... " command.
3111  */
3112     void
3113 ex_unlet(eap)
3114     exarg_T	*eap;
3115 {
3116     ex_unletlock(eap, eap->arg, 0);
3117 }
3118 
3119 /*
3120  * ":lockvar" and ":unlockvar" commands
3121  */
3122     void
3123 ex_lockvar(eap)
3124     exarg_T	*eap;
3125 {
3126     char_u	*arg = eap->arg;
3127     int		deep = 2;
3128 
3129     if (eap->forceit)
3130 	deep = -1;
3131     else if (vim_isdigit(*arg))
3132     {
3133 	deep = getdigits(&arg);
3134 	arg = skipwhite(arg);
3135     }
3136 
3137     ex_unletlock(eap, arg, deep);
3138 }
3139 
3140 /*
3141  * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
3142  */
3143     static void
3144 ex_unletlock(eap, argstart, deep)
3145     exarg_T	*eap;
3146     char_u	*argstart;
3147     int		deep;
3148 {
3149     char_u	*arg = argstart;
3150     char_u	*name_end;
3151     int		error = FALSE;
3152     lval_T	lv;
3153 
3154     do
3155     {
3156 	/* Parse the name and find the end. */
3157 	name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, FALSE,
3158 							     FNE_CHECK_START);
3159 	if (lv.ll_name == NULL)
3160 	    error = TRUE;	    /* error but continue parsing */
3161 	if (name_end == NULL || (!vim_iswhite(*name_end)
3162 						   && !ends_excmd(*name_end)))
3163 	{
3164 	    if (name_end != NULL)
3165 	    {
3166 		emsg_severe = TRUE;
3167 		EMSG(_(e_trailing));
3168 	    }
3169 	    if (!(eap->skip || error))
3170 		clear_lval(&lv);
3171 	    break;
3172 	}
3173 
3174 	if (!error && !eap->skip)
3175 	{
3176 	    if (eap->cmdidx == CMD_unlet)
3177 	    {
3178 		if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
3179 		    error = TRUE;
3180 	    }
3181 	    else
3182 	    {
3183 		if (do_lock_var(&lv, name_end, deep,
3184 					  eap->cmdidx == CMD_lockvar) == FAIL)
3185 		    error = TRUE;
3186 	    }
3187 	}
3188 
3189 	if (!eap->skip)
3190 	    clear_lval(&lv);
3191 
3192 	arg = skipwhite(name_end);
3193     } while (!ends_excmd(*arg));
3194 
3195     eap->nextcmd = check_nextcmd(arg);
3196 }
3197 
3198     static int
3199 do_unlet_var(lp, name_end, forceit)
3200     lval_T	*lp;
3201     char_u	*name_end;
3202     int		forceit;
3203 {
3204     int		ret = OK;
3205     int		cc;
3206 
3207     if (lp->ll_tv == NULL)
3208     {
3209 	cc = *name_end;
3210 	*name_end = NUL;
3211 
3212 	/* Normal name or expanded name. */
3213 	if (check_changedtick(lp->ll_name))
3214 	    ret = FAIL;
3215 	else if (do_unlet(lp->ll_name, forceit) == FAIL)
3216 	    ret = FAIL;
3217 	*name_end = cc;
3218     }
3219     else if (tv_check_lock(lp->ll_tv->v_lock, lp->ll_name))
3220 	return FAIL;
3221     else if (lp->ll_range)
3222     {
3223 	listitem_T    *li;
3224 
3225 	/* Delete a range of List items. */
3226 	while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3227 	{
3228 	    li = lp->ll_li->li_next;
3229 	    listitem_remove(lp->ll_list, lp->ll_li);
3230 	    lp->ll_li = li;
3231 	    ++lp->ll_n1;
3232 	}
3233     }
3234     else
3235     {
3236 	if (lp->ll_list != NULL)
3237 	    /* unlet a List item. */
3238 	    listitem_remove(lp->ll_list, lp->ll_li);
3239 	else
3240 	    /* unlet a Dictionary item. */
3241 	    dictitem_remove(lp->ll_dict, lp->ll_di);
3242     }
3243 
3244     return ret;
3245 }
3246 
3247 /*
3248  * "unlet" a variable.  Return OK if it existed, FAIL if not.
3249  * When "forceit" is TRUE don't complain if the variable doesn't exist.
3250  */
3251     int
3252 do_unlet(name, forceit)
3253     char_u	*name;
3254     int		forceit;
3255 {
3256     hashtab_T	*ht;
3257     hashitem_T	*hi;
3258     char_u	*varname;
3259 
3260     ht = find_var_ht(name, &varname);
3261     if (ht != NULL && *varname != NUL)
3262     {
3263 	hi = hash_find(ht, varname);
3264 	if (!HASHITEM_EMPTY(hi))
3265 	{
3266 	    if (var_check_ro(HI2DI(hi)->di_flags, name))
3267 		return FAIL;
3268 	    delete_var(ht, hi);
3269 	    return OK;
3270 	}
3271     }
3272     if (forceit)
3273 	return OK;
3274     EMSG2(_("E108: No such variable: \"%s\""), name);
3275     return FAIL;
3276 }
3277 
3278 /*
3279  * Lock or unlock variable indicated by "lp".
3280  * "deep" is the levels to go (-1 for unlimited);
3281  * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
3282  */
3283     static int
3284 do_lock_var(lp, name_end, deep, lock)
3285     lval_T	*lp;
3286     char_u	*name_end;
3287     int		deep;
3288     int		lock;
3289 {
3290     int		ret = OK;
3291     int		cc;
3292     dictitem_T	*di;
3293 
3294     if (deep == 0)	/* nothing to do */
3295 	return OK;
3296 
3297     if (lp->ll_tv == NULL)
3298     {
3299 	cc = *name_end;
3300 	*name_end = NUL;
3301 
3302 	/* Normal name or expanded name. */
3303 	if (check_changedtick(lp->ll_name))
3304 	    ret = FAIL;
3305 	else
3306 	{
3307 	    di = find_var(lp->ll_name, NULL);
3308 	    if (di == NULL)
3309 		ret = FAIL;
3310 	    else
3311 	    {
3312 		if (lock)
3313 		    di->di_flags |= DI_FLAGS_LOCK;
3314 		else
3315 		    di->di_flags &= ~DI_FLAGS_LOCK;
3316 		item_lock(&di->di_tv, deep, lock);
3317 	    }
3318 	}
3319 	*name_end = cc;
3320     }
3321     else if (lp->ll_range)
3322     {
3323 	listitem_T    *li = lp->ll_li;
3324 
3325 	/* (un)lock a range of List items. */
3326 	while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
3327 	{
3328 	    item_lock(&li->li_tv, deep, lock);
3329 	    li = li->li_next;
3330 	    ++lp->ll_n1;
3331 	}
3332     }
3333     else if (lp->ll_list != NULL)
3334 	/* (un)lock a List item. */
3335 	item_lock(&lp->ll_li->li_tv, deep, lock);
3336     else
3337 	/* un(lock) a Dictionary item. */
3338 	item_lock(&lp->ll_di->di_tv, deep, lock);
3339 
3340     return ret;
3341 }
3342 
3343 /*
3344  * Lock or unlock an item.  "deep" is nr of levels to go.
3345  */
3346     static void
3347 item_lock(tv, deep, lock)
3348     typval_T	*tv;
3349     int		deep;
3350     int		lock;
3351 {
3352     static int	recurse = 0;
3353     list_T	*l;
3354     listitem_T	*li;
3355     dict_T	*d;
3356     hashitem_T	*hi;
3357     int		todo;
3358 
3359     if (recurse >= DICT_MAXNEST)
3360     {
3361 	EMSG(_("E743: variable nested too deep for (un)lock"));
3362 	return;
3363     }
3364     if (deep == 0)
3365 	return;
3366     ++recurse;
3367 
3368     /* lock/unlock the item itself */
3369     if (lock)
3370 	tv->v_lock |= VAR_LOCKED;
3371     else
3372 	tv->v_lock &= ~VAR_LOCKED;
3373 
3374     switch (tv->v_type)
3375     {
3376 	case VAR_LIST:
3377 	    if ((l = tv->vval.v_list) != NULL)
3378 	    {
3379 		if (lock)
3380 		    l->lv_lock |= VAR_LOCKED;
3381 		else
3382 		    l->lv_lock &= ~VAR_LOCKED;
3383 		if (deep < 0 || deep > 1)
3384 		    /* recursive: lock/unlock the items the List contains */
3385 		    for (li = l->lv_first; li != NULL; li = li->li_next)
3386 			item_lock(&li->li_tv, deep - 1, lock);
3387 	    }
3388 	    break;
3389 	case VAR_DICT:
3390 	    if ((d = tv->vval.v_dict) != NULL)
3391 	    {
3392 		if (lock)
3393 		    d->dv_lock |= VAR_LOCKED;
3394 		else
3395 		    d->dv_lock &= ~VAR_LOCKED;
3396 		if (deep < 0 || deep > 1)
3397 		{
3398 		    /* recursive: lock/unlock the items the List contains */
3399 		    todo = d->dv_hashtab.ht_used;
3400 		    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
3401 		    {
3402 			if (!HASHITEM_EMPTY(hi))
3403 			{
3404 			    --todo;
3405 			    item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
3406 			}
3407 		    }
3408 		}
3409 	    }
3410     }
3411     --recurse;
3412 }
3413 
3414 /*
3415  * Return TRUE if typeval "tv" is locked: Either tha value is locked itself or
3416  * it refers to a List or Dictionary that is locked.
3417  */
3418     static int
3419 tv_islocked(tv)
3420     typval_T	*tv;
3421 {
3422     return (tv->v_lock & VAR_LOCKED)
3423 	|| (tv->v_type == VAR_LIST
3424 		&& tv->vval.v_list != NULL
3425 		&& (tv->vval.v_list->lv_lock & VAR_LOCKED))
3426 	|| (tv->v_type == VAR_DICT
3427 		&& tv->vval.v_dict != NULL
3428 		&& (tv->vval.v_dict->dv_lock & VAR_LOCKED));
3429 }
3430 
3431 #if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
3432 /*
3433  * Delete all "menutrans_" variables.
3434  */
3435     void
3436 del_menutrans_vars()
3437 {
3438     hashitem_T	*hi;
3439     int		todo;
3440 
3441     hash_lock(&globvarht);
3442     todo = globvarht.ht_used;
3443     for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
3444     {
3445 	if (!HASHITEM_EMPTY(hi))
3446 	{
3447 	    --todo;
3448 	    if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
3449 		delete_var(&globvarht, hi);
3450 	}
3451     }
3452     hash_unlock(&globvarht);
3453 }
3454 #endif
3455 
3456 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
3457 
3458 /*
3459  * Local string buffer for the next two functions to store a variable name
3460  * with its prefix. Allocated in cat_prefix_varname(), freed later in
3461  * get_user_var_name().
3462  */
3463 
3464 static char_u *cat_prefix_varname __ARGS((int prefix, char_u *name));
3465 
3466 static char_u	*varnamebuf = NULL;
3467 static int	varnamebuflen = 0;
3468 
3469 /*
3470  * Function to concatenate a prefix and a variable name.
3471  */
3472     static char_u *
3473 cat_prefix_varname(prefix, name)
3474     int		prefix;
3475     char_u	*name;
3476 {
3477     int		len;
3478 
3479     len = (int)STRLEN(name) + 3;
3480     if (len > varnamebuflen)
3481     {
3482 	vim_free(varnamebuf);
3483 	len += 10;			/* some additional space */
3484 	varnamebuf = alloc(len);
3485 	if (varnamebuf == NULL)
3486 	{
3487 	    varnamebuflen = 0;
3488 	    return NULL;
3489 	}
3490 	varnamebuflen = len;
3491     }
3492     *varnamebuf = prefix;
3493     varnamebuf[1] = ':';
3494     STRCPY(varnamebuf + 2, name);
3495     return varnamebuf;
3496 }
3497 
3498 /*
3499  * Function given to ExpandGeneric() to obtain the list of user defined
3500  * (global/buffer/window/built-in) variable names.
3501  */
3502 /*ARGSUSED*/
3503     char_u *
3504 get_user_var_name(xp, idx)
3505     expand_T	*xp;
3506     int		idx;
3507 {
3508     static long_u	gdone;
3509     static long_u	bdone;
3510     static long_u	wdone;
3511     static int		vidx;
3512     static hashitem_T	*hi;
3513     hashtab_T		*ht;
3514 
3515     if (idx == 0)
3516 	gdone = bdone = wdone = vidx = 0;
3517 
3518     /* Global variables */
3519     if (gdone < globvarht.ht_used)
3520     {
3521 	if (gdone++ == 0)
3522 	    hi = globvarht.ht_array;
3523 	else
3524 	    ++hi;
3525 	while (HASHITEM_EMPTY(hi))
3526 	    ++hi;
3527 	if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
3528 	    return cat_prefix_varname('g', hi->hi_key);
3529 	return hi->hi_key;
3530     }
3531 
3532     /* b: variables */
3533     ht = &curbuf->b_vars.dv_hashtab;
3534     if (bdone < ht->ht_used)
3535     {
3536 	if (bdone++ == 0)
3537 	    hi = ht->ht_array;
3538 	else
3539 	    ++hi;
3540 	while (HASHITEM_EMPTY(hi))
3541 	    ++hi;
3542 	return cat_prefix_varname('b', hi->hi_key);
3543     }
3544     if (bdone == ht->ht_used)
3545     {
3546 	++bdone;
3547 	return (char_u *)"b:changedtick";
3548     }
3549 
3550     /* w: variables */
3551     ht = &curwin->w_vars.dv_hashtab;
3552     if (wdone < ht->ht_used)
3553     {
3554 	if (wdone++ == 0)
3555 	    hi = ht->ht_array;
3556 	else
3557 	    ++hi;
3558 	while (HASHITEM_EMPTY(hi))
3559 	    ++hi;
3560 	return cat_prefix_varname('w', hi->hi_key);
3561     }
3562 
3563     /* v: variables */
3564     if (vidx < VV_LEN)
3565 	return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
3566 
3567     vim_free(varnamebuf);
3568     varnamebuf = NULL;
3569     varnamebuflen = 0;
3570     return NULL;
3571 }
3572 
3573 #endif /* FEAT_CMDL_COMPL */
3574 
3575 /*
3576  * types for expressions.
3577  */
3578 typedef enum
3579 {
3580     TYPE_UNKNOWN = 0
3581     , TYPE_EQUAL	/* == */
3582     , TYPE_NEQUAL	/* != */
3583     , TYPE_GREATER	/* >  */
3584     , TYPE_GEQUAL	/* >= */
3585     , TYPE_SMALLER	/* <  */
3586     , TYPE_SEQUAL	/* <= */
3587     , TYPE_MATCH	/* =~ */
3588     , TYPE_NOMATCH	/* !~ */
3589 } exptype_T;
3590 
3591 /*
3592  * The "evaluate" argument: When FALSE, the argument is only parsed but not
3593  * executed.  The function may return OK, but the rettv will be of type
3594  * VAR_UNKNOWN.  The function still returns FAIL for a syntax error.
3595  */
3596 
3597 /*
3598  * Handle zero level expression.
3599  * This calls eval1() and handles error message and nextcmd.
3600  * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
3601  * Return OK or FAIL.
3602  */
3603     static int
3604 eval0(arg, rettv, nextcmd, evaluate)
3605     char_u	*arg;
3606     typval_T	*rettv;
3607     char_u	**nextcmd;
3608     int		evaluate;
3609 {
3610     int		ret;
3611     char_u	*p;
3612 
3613     p = skipwhite(arg);
3614     ret = eval1(&p, rettv, evaluate);
3615     if (ret == FAIL || !ends_excmd(*p))
3616     {
3617 	if (ret != FAIL)
3618 	    clear_tv(rettv);
3619 	/*
3620 	 * Report the invalid expression unless the expression evaluation has
3621 	 * been cancelled due to an aborting error, an interrupt, or an
3622 	 * exception.
3623 	 */
3624 	if (!aborting())
3625 	    EMSG2(_(e_invexpr2), arg);
3626 	ret = FAIL;
3627     }
3628     if (nextcmd != NULL)
3629 	*nextcmd = check_nextcmd(p);
3630 
3631     return ret;
3632 }
3633 
3634 /*
3635  * Handle top level expression:
3636  *	expr1 ? expr0 : expr0
3637  *
3638  * "arg" must point to the first non-white of the expression.
3639  * "arg" is advanced to the next non-white after the recognized expression.
3640  *
3641  * Return OK or FAIL.
3642  */
3643     static int
3644 eval1(arg, rettv, evaluate)
3645     char_u	**arg;
3646     typval_T	*rettv;
3647     int		evaluate;
3648 {
3649     int		result;
3650     typval_T	var2;
3651 
3652     /*
3653      * Get the first variable.
3654      */
3655     if (eval2(arg, rettv, evaluate) == FAIL)
3656 	return FAIL;
3657 
3658     if ((*arg)[0] == '?')
3659     {
3660 	result = FALSE;
3661 	if (evaluate)
3662 	{
3663 	    int		error = FALSE;
3664 
3665 	    if (get_tv_number_chk(rettv, &error) != 0)
3666 		result = TRUE;
3667 	    clear_tv(rettv);
3668 	    if (error)
3669 		return FAIL;
3670 	}
3671 
3672 	/*
3673 	 * Get the second variable.
3674 	 */
3675 	*arg = skipwhite(*arg + 1);
3676 	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
3677 	    return FAIL;
3678 
3679 	/*
3680 	 * Check for the ":".
3681 	 */
3682 	if ((*arg)[0] != ':')
3683 	{
3684 	    EMSG(_("E109: Missing ':' after '?'"));
3685 	    if (evaluate && result)
3686 		clear_tv(rettv);
3687 	    return FAIL;
3688 	}
3689 
3690 	/*
3691 	 * Get the third variable.
3692 	 */
3693 	*arg = skipwhite(*arg + 1);
3694 	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
3695 	{
3696 	    if (evaluate && result)
3697 		clear_tv(rettv);
3698 	    return FAIL;
3699 	}
3700 	if (evaluate && !result)
3701 	    *rettv = var2;
3702     }
3703 
3704     return OK;
3705 }
3706 
3707 /*
3708  * Handle first level expression:
3709  *	expr2 || expr2 || expr2	    logical OR
3710  *
3711  * "arg" must point to the first non-white of the expression.
3712  * "arg" is advanced to the next non-white after the recognized expression.
3713  *
3714  * Return OK or FAIL.
3715  */
3716     static int
3717 eval2(arg, rettv, evaluate)
3718     char_u	**arg;
3719     typval_T	*rettv;
3720     int		evaluate;
3721 {
3722     typval_T	var2;
3723     long	result;
3724     int		first;
3725     int		error = FALSE;
3726 
3727     /*
3728      * Get the first variable.
3729      */
3730     if (eval3(arg, rettv, evaluate) == FAIL)
3731 	return FAIL;
3732 
3733     /*
3734      * Repeat until there is no following "||".
3735      */
3736     first = TRUE;
3737     result = FALSE;
3738     while ((*arg)[0] == '|' && (*arg)[1] == '|')
3739     {
3740 	if (evaluate && first)
3741 	{
3742 	    if (get_tv_number_chk(rettv, &error) != 0)
3743 		result = TRUE;
3744 	    clear_tv(rettv);
3745 	    if (error)
3746 		return FAIL;
3747 	    first = FALSE;
3748 	}
3749 
3750 	/*
3751 	 * Get the second variable.
3752 	 */
3753 	*arg = skipwhite(*arg + 2);
3754 	if (eval3(arg, &var2, evaluate && !result) == FAIL)
3755 	    return FAIL;
3756 
3757 	/*
3758 	 * Compute the result.
3759 	 */
3760 	if (evaluate && !result)
3761 	{
3762 	    if (get_tv_number_chk(&var2, &error) != 0)
3763 		result = TRUE;
3764 	    clear_tv(&var2);
3765 	    if (error)
3766 		return FAIL;
3767 	}
3768 	if (evaluate)
3769 	{
3770 	    rettv->v_type = VAR_NUMBER;
3771 	    rettv->vval.v_number = result;
3772 	}
3773     }
3774 
3775     return OK;
3776 }
3777 
3778 /*
3779  * Handle second level expression:
3780  *	expr3 && expr3 && expr3	    logical AND
3781  *
3782  * "arg" must point to the first non-white of the expression.
3783  * "arg" is advanced to the next non-white after the recognized expression.
3784  *
3785  * Return OK or FAIL.
3786  */
3787     static int
3788 eval3(arg, rettv, evaluate)
3789     char_u	**arg;
3790     typval_T	*rettv;
3791     int		evaluate;
3792 {
3793     typval_T	var2;
3794     long	result;
3795     int		first;
3796     int		error = FALSE;
3797 
3798     /*
3799      * Get the first variable.
3800      */
3801     if (eval4(arg, rettv, evaluate) == FAIL)
3802 	return FAIL;
3803 
3804     /*
3805      * Repeat until there is no following "&&".
3806      */
3807     first = TRUE;
3808     result = TRUE;
3809     while ((*arg)[0] == '&' && (*arg)[1] == '&')
3810     {
3811 	if (evaluate && first)
3812 	{
3813 	    if (get_tv_number_chk(rettv, &error) == 0)
3814 		result = FALSE;
3815 	    clear_tv(rettv);
3816 	    if (error)
3817 		return FAIL;
3818 	    first = FALSE;
3819 	}
3820 
3821 	/*
3822 	 * Get the second variable.
3823 	 */
3824 	*arg = skipwhite(*arg + 2);
3825 	if (eval4(arg, &var2, evaluate && result) == FAIL)
3826 	    return FAIL;
3827 
3828 	/*
3829 	 * Compute the result.
3830 	 */
3831 	if (evaluate && result)
3832 	{
3833 	    if (get_tv_number_chk(&var2, &error) == 0)
3834 		result = FALSE;
3835 	    clear_tv(&var2);
3836 	    if (error)
3837 		return FAIL;
3838 	}
3839 	if (evaluate)
3840 	{
3841 	    rettv->v_type = VAR_NUMBER;
3842 	    rettv->vval.v_number = result;
3843 	}
3844     }
3845 
3846     return OK;
3847 }
3848 
3849 /*
3850  * Handle third level expression:
3851  *	var1 == var2
3852  *	var1 =~ var2
3853  *	var1 != var2
3854  *	var1 !~ var2
3855  *	var1 > var2
3856  *	var1 >= var2
3857  *	var1 < var2
3858  *	var1 <= var2
3859  *	var1 is var2
3860  *	var1 isnot var2
3861  *
3862  * "arg" must point to the first non-white of the expression.
3863  * "arg" is advanced to the next non-white after the recognized expression.
3864  *
3865  * Return OK or FAIL.
3866  */
3867     static int
3868 eval4(arg, rettv, evaluate)
3869     char_u	**arg;
3870     typval_T	*rettv;
3871     int		evaluate;
3872 {
3873     typval_T	var2;
3874     char_u	*p;
3875     int		i;
3876     exptype_T	type = TYPE_UNKNOWN;
3877     int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
3878     int		len = 2;
3879     long	n1, n2;
3880     char_u	*s1, *s2;
3881     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
3882     regmatch_T	regmatch;
3883     int		ic;
3884     char_u	*save_cpo;
3885 
3886     /*
3887      * Get the first variable.
3888      */
3889     if (eval5(arg, rettv, evaluate) == FAIL)
3890 	return FAIL;
3891 
3892     p = *arg;
3893     switch (p[0])
3894     {
3895 	case '=':   if (p[1] == '=')
3896 			type = TYPE_EQUAL;
3897 		    else if (p[1] == '~')
3898 			type = TYPE_MATCH;
3899 		    break;
3900 	case '!':   if (p[1] == '=')
3901 			type = TYPE_NEQUAL;
3902 		    else if (p[1] == '~')
3903 			type = TYPE_NOMATCH;
3904 		    break;
3905 	case '>':   if (p[1] != '=')
3906 		    {
3907 			type = TYPE_GREATER;
3908 			len = 1;
3909 		    }
3910 		    else
3911 			type = TYPE_GEQUAL;
3912 		    break;
3913 	case '<':   if (p[1] != '=')
3914 		    {
3915 			type = TYPE_SMALLER;
3916 			len = 1;
3917 		    }
3918 		    else
3919 			type = TYPE_SEQUAL;
3920 		    break;
3921 	case 'i':   if (p[1] == 's')
3922 		    {
3923 			if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
3924 			    len = 5;
3925 			if (!vim_isIDc(p[len]))
3926 			{
3927 			    type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
3928 			    type_is = TRUE;
3929 			}
3930 		    }
3931 		    break;
3932     }
3933 
3934     /*
3935      * If there is a comparitive operator, use it.
3936      */
3937     if (type != TYPE_UNKNOWN)
3938     {
3939 	/* extra question mark appended: ignore case */
3940 	if (p[len] == '?')
3941 	{
3942 	    ic = TRUE;
3943 	    ++len;
3944 	}
3945 	/* extra '#' appended: match case */
3946 	else if (p[len] == '#')
3947 	{
3948 	    ic = FALSE;
3949 	    ++len;
3950 	}
3951 	/* nothing appened: use 'ignorecase' */
3952 	else
3953 	    ic = p_ic;
3954 
3955 	/*
3956 	 * Get the second variable.
3957 	 */
3958 	*arg = skipwhite(p + len);
3959 	if (eval5(arg, &var2, evaluate) == FAIL)
3960 	{
3961 	    clear_tv(rettv);
3962 	    return FAIL;
3963 	}
3964 
3965 	if (evaluate)
3966 	{
3967 	    if (type_is && rettv->v_type != var2.v_type)
3968 	    {
3969 		/* For "is" a different type always means FALSE, for "notis"
3970 		 * it means TRUE. */
3971 		n1 = (type == TYPE_NEQUAL);
3972 	    }
3973 	    else if (rettv->v_type == VAR_LIST || var2.v_type == VAR_LIST)
3974 	    {
3975 		if (type_is)
3976 		{
3977 		    n1 = (rettv->v_type == var2.v_type
3978 				   && rettv->vval.v_list == var2.vval.v_list);
3979 		    if (type == TYPE_NEQUAL)
3980 			n1 = !n1;
3981 		}
3982 		else if (rettv->v_type != var2.v_type
3983 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
3984 		{
3985 		    if (rettv->v_type != var2.v_type)
3986 			EMSG(_("E691: Can only compare List with List"));
3987 		    else
3988 			EMSG(_("E692: Invalid operation for Lists"));
3989 		    clear_tv(rettv);
3990 		    clear_tv(&var2);
3991 		    return FAIL;
3992 		}
3993 		else
3994 		{
3995 		    /* Compare two Lists for being equal or unequal. */
3996 		    n1 = list_equal(rettv->vval.v_list, var2.vval.v_list, ic);
3997 		    if (type == TYPE_NEQUAL)
3998 			n1 = !n1;
3999 		}
4000 	    }
4001 
4002 	    else if (rettv->v_type == VAR_DICT || var2.v_type == VAR_DICT)
4003 	    {
4004 		if (type_is)
4005 		{
4006 		    n1 = (rettv->v_type == var2.v_type
4007 				   && rettv->vval.v_dict == var2.vval.v_dict);
4008 		    if (type == TYPE_NEQUAL)
4009 			n1 = !n1;
4010 		}
4011 		else if (rettv->v_type != var2.v_type
4012 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4013 		{
4014 		    if (rettv->v_type != var2.v_type)
4015 			EMSG(_("E735: Can only compare Dictionary with Dictionary"));
4016 		    else
4017 			EMSG(_("E736: Invalid operation for Dictionary"));
4018 		    clear_tv(rettv);
4019 		    clear_tv(&var2);
4020 		    return FAIL;
4021 		}
4022 		else
4023 		{
4024 		    /* Compare two Dictionaries for being equal or unequal. */
4025 		    n1 = dict_equal(rettv->vval.v_dict, var2.vval.v_dict, ic);
4026 		    if (type == TYPE_NEQUAL)
4027 			n1 = !n1;
4028 		}
4029 	    }
4030 
4031 	    else if (rettv->v_type == VAR_FUNC || var2.v_type == VAR_FUNC)
4032 	    {
4033 		if (rettv->v_type != var2.v_type
4034 			|| (type != TYPE_EQUAL && type != TYPE_NEQUAL))
4035 		{
4036 		    if (rettv->v_type != var2.v_type)
4037 			EMSG(_("E693: Can only compare Funcref with Funcref"));
4038 		    else
4039 			EMSG(_("E694: Invalid operation for Funcrefs"));
4040 		    clear_tv(rettv);
4041 		    clear_tv(&var2);
4042 		    return FAIL;
4043 		}
4044 		else
4045 		{
4046 		    /* Compare two Funcrefs for being equal or unequal. */
4047 		    if (rettv->vval.v_string == NULL
4048 						|| var2.vval.v_string == NULL)
4049 			n1 = FALSE;
4050 		    else
4051 			n1 = STRCMP(rettv->vval.v_string,
4052 						     var2.vval.v_string) == 0;
4053 		    if (type == TYPE_NEQUAL)
4054 			n1 = !n1;
4055 		}
4056 	    }
4057 
4058 	    /*
4059 	     * If one of the two variables is a number, compare as a number.
4060 	     * When using "=~" or "!~", always compare as string.
4061 	     */
4062 	    else if ((rettv->v_type == VAR_NUMBER || var2.v_type == VAR_NUMBER)
4063 		    && type != TYPE_MATCH && type != TYPE_NOMATCH)
4064 	    {
4065 		n1 = get_tv_number(rettv);
4066 		n2 = get_tv_number(&var2);
4067 		switch (type)
4068 		{
4069 		    case TYPE_EQUAL:    n1 = (n1 == n2); break;
4070 		    case TYPE_NEQUAL:   n1 = (n1 != n2); break;
4071 		    case TYPE_GREATER:  n1 = (n1 > n2); break;
4072 		    case TYPE_GEQUAL:   n1 = (n1 >= n2); break;
4073 		    case TYPE_SMALLER:  n1 = (n1 < n2); break;
4074 		    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
4075 		    case TYPE_UNKNOWN:
4076 		    case TYPE_MATCH:
4077 		    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
4078 		}
4079 	    }
4080 	    else
4081 	    {
4082 		s1 = get_tv_string_buf(rettv, buf1);
4083 		s2 = get_tv_string_buf(&var2, buf2);
4084 		if (type != TYPE_MATCH && type != TYPE_NOMATCH)
4085 		    i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
4086 		else
4087 		    i = 0;
4088 		n1 = FALSE;
4089 		switch (type)
4090 		{
4091 		    case TYPE_EQUAL:    n1 = (i == 0); break;
4092 		    case TYPE_NEQUAL:   n1 = (i != 0); break;
4093 		    case TYPE_GREATER:  n1 = (i > 0); break;
4094 		    case TYPE_GEQUAL:   n1 = (i >= 0); break;
4095 		    case TYPE_SMALLER:  n1 = (i < 0); break;
4096 		    case TYPE_SEQUAL:   n1 = (i <= 0); break;
4097 
4098 		    case TYPE_MATCH:
4099 		    case TYPE_NOMATCH:
4100 			    /* avoid 'l' flag in 'cpoptions' */
4101 			    save_cpo = p_cpo;
4102 			    p_cpo = (char_u *)"";
4103 			    regmatch.regprog = vim_regcomp(s2,
4104 							RE_MAGIC + RE_STRING);
4105 			    regmatch.rm_ic = ic;
4106 			    if (regmatch.regprog != NULL)
4107 			    {
4108 				n1 = vim_regexec_nl(&regmatch, s1, (colnr_T)0);
4109 				vim_free(regmatch.regprog);
4110 				if (type == TYPE_NOMATCH)
4111 				    n1 = !n1;
4112 			    }
4113 			    p_cpo = save_cpo;
4114 			    break;
4115 
4116 		    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
4117 		}
4118 	    }
4119 	    clear_tv(rettv);
4120 	    clear_tv(&var2);
4121 	    rettv->v_type = VAR_NUMBER;
4122 	    rettv->vval.v_number = n1;
4123 	}
4124     }
4125 
4126     return OK;
4127 }
4128 
4129 /*
4130  * Handle fourth level expression:
4131  *	+	number addition
4132  *	-	number subtraction
4133  *	.	string concatenation
4134  *
4135  * "arg" must point to the first non-white of the expression.
4136  * "arg" is advanced to the next non-white after the recognized expression.
4137  *
4138  * Return OK or FAIL.
4139  */
4140     static int
4141 eval5(arg, rettv, evaluate)
4142     char_u	**arg;
4143     typval_T	*rettv;
4144     int		evaluate;
4145 {
4146     typval_T	var2;
4147     typval_T	var3;
4148     int		op;
4149     long	n1, n2;
4150     char_u	*s1, *s2;
4151     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
4152     char_u	*p;
4153 
4154     /*
4155      * Get the first variable.
4156      */
4157     if (eval6(arg, rettv, evaluate) == FAIL)
4158 	return FAIL;
4159 
4160     /*
4161      * Repeat computing, until no '+', '-' or '.' is following.
4162      */
4163     for (;;)
4164     {
4165 	op = **arg;
4166 	if (op != '+' && op != '-' && op != '.')
4167 	    break;
4168 
4169 	if (op != '+' || rettv->v_type != VAR_LIST)
4170 	{
4171 	    /* For "list + ...", an illegal use of the first operand as
4172 	     * a number cannot be determined before evaluating the 2nd
4173 	     * operand: if this is also a list, all is ok.
4174 	     * For "something . ...", "something - ..." or "non-list + ...",
4175 	     * we know that the first operand needs to be a string or number
4176 	     * without evaluating the 2nd operand.  So check before to avoid
4177 	     * side effects after an error. */
4178 	    if (evaluate && get_tv_string_chk(rettv) == NULL)
4179 	    {
4180 		clear_tv(rettv);
4181 		return FAIL;
4182 	    }
4183 	}
4184 
4185 	/*
4186 	 * Get the second variable.
4187 	 */
4188 	*arg = skipwhite(*arg + 1);
4189 	if (eval6(arg, &var2, evaluate) == FAIL)
4190 	{
4191 	    clear_tv(rettv);
4192 	    return FAIL;
4193 	}
4194 
4195 	if (evaluate)
4196 	{
4197 	    /*
4198 	     * Compute the result.
4199 	     */
4200 	    if (op == '.')
4201 	    {
4202 		s1 = get_tv_string_buf(rettv, buf1);	/* already checked */
4203 		s2 = get_tv_string_buf_chk(&var2, buf2);
4204 		if (s2 == NULL)		/* type error ? */
4205 		{
4206 		    clear_tv(rettv);
4207 		    clear_tv(&var2);
4208 		    return FAIL;
4209 		}
4210 		p = concat_str(s1, s2);
4211 		clear_tv(rettv);
4212 		rettv->v_type = VAR_STRING;
4213 		rettv->vval.v_string = p;
4214 	    }
4215 	    else if (op == '+' && rettv->v_type == VAR_LIST
4216 						   && var2.v_type == VAR_LIST)
4217 	    {
4218 		/* concatenate Lists */
4219 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
4220 							       &var3) == FAIL)
4221 		{
4222 		    clear_tv(rettv);
4223 		    clear_tv(&var2);
4224 		    return FAIL;
4225 		}
4226 		clear_tv(rettv);
4227 		*rettv = var3;
4228 	    }
4229 	    else
4230 	    {
4231 		int	    error = FALSE;
4232 
4233 		n1 = get_tv_number_chk(rettv, &error);
4234 		if (error)
4235 		{
4236 		    /* This can only happen for "list + non-list".
4237 		     * For "non-list + ..." or "something - ...", we returned
4238 		     * before evaluating the 2nd operand. */
4239 		    clear_tv(rettv);
4240 		    return FAIL;
4241 		}
4242 		n2 = get_tv_number_chk(&var2, &error);
4243 		if (error)
4244 		{
4245 		    clear_tv(rettv);
4246 		    clear_tv(&var2);
4247 		    return FAIL;
4248 		}
4249 		clear_tv(rettv);
4250 		if (op == '+')
4251 		    n1 = n1 + n2;
4252 		else
4253 		    n1 = n1 - n2;
4254 		rettv->v_type = VAR_NUMBER;
4255 		rettv->vval.v_number = n1;
4256 	    }
4257 	    clear_tv(&var2);
4258 	}
4259     }
4260     return OK;
4261 }
4262 
4263 /*
4264  * Handle fifth level expression:
4265  *	*	number multiplication
4266  *	/	number division
4267  *	%	number modulo
4268  *
4269  * "arg" must point to the first non-white of the expression.
4270  * "arg" is advanced to the next non-white after the recognized expression.
4271  *
4272  * Return OK or FAIL.
4273  */
4274     static int
4275 eval6(arg, rettv, evaluate)
4276     char_u	**arg;
4277     typval_T	*rettv;
4278     int		evaluate;
4279 {
4280     typval_T	var2;
4281     int		op;
4282     long	n1, n2;
4283     int		error = FALSE;
4284 
4285     /*
4286      * Get the first variable.
4287      */
4288     if (eval7(arg, rettv, evaluate) == FAIL)
4289 	return FAIL;
4290 
4291     /*
4292      * Repeat computing, until no '*', '/' or '%' is following.
4293      */
4294     for (;;)
4295     {
4296 	op = **arg;
4297 	if (op != '*' && op != '/' && op != '%')
4298 	    break;
4299 
4300 	if (evaluate)
4301 	{
4302 	    n1 = get_tv_number_chk(rettv, &error);
4303 	    clear_tv(rettv);
4304 	    if (error)
4305 		return FAIL;
4306 	}
4307 	else
4308 	    n1 = 0;
4309 
4310 	/*
4311 	 * Get the second variable.
4312 	 */
4313 	*arg = skipwhite(*arg + 1);
4314 	if (eval7(arg, &var2, evaluate) == FAIL)
4315 	    return FAIL;
4316 
4317 	if (evaluate)
4318 	{
4319 	    n2 = get_tv_number_chk(&var2, &error);
4320 	    clear_tv(&var2);
4321 	    if (error)
4322 		return FAIL;
4323 
4324 	    /*
4325 	     * Compute the result.
4326 	     */
4327 	    if (op == '*')
4328 		n1 = n1 * n2;
4329 	    else if (op == '/')
4330 	    {
4331 		if (n2 == 0)	/* give an error message? */
4332 		    n1 = 0x7fffffffL;
4333 		else
4334 		    n1 = n1 / n2;
4335 	    }
4336 	    else
4337 	    {
4338 		if (n2 == 0)	/* give an error message? */
4339 		    n1 = 0;
4340 		else
4341 		    n1 = n1 % n2;
4342 	    }
4343 	    rettv->v_type = VAR_NUMBER;
4344 	    rettv->vval.v_number = n1;
4345 	}
4346     }
4347 
4348     return OK;
4349 }
4350 
4351 /*
4352  * Handle sixth level expression:
4353  *  number		number constant
4354  *  "string"		string contstant
4355  *  'string'		literal string contstant
4356  *  &option-name	option value
4357  *  @r			register contents
4358  *  identifier		variable value
4359  *  function()		function call
4360  *  $VAR		environment variable
4361  *  (expression)	nested expression
4362  *  [expr, expr]	List
4363  *  {key: val, key: val}  Dictionary
4364  *
4365  *  Also handle:
4366  *  ! in front		logical NOT
4367  *  - in front		unary minus
4368  *  + in front		unary plus (ignored)
4369  *  trailing []		subscript in String or List
4370  *  trailing .name	entry in Dictionary
4371  *
4372  * "arg" must point to the first non-white of the expression.
4373  * "arg" is advanced to the next non-white after the recognized expression.
4374  *
4375  * Return OK or FAIL.
4376  */
4377     static int
4378 eval7(arg, rettv, evaluate)
4379     char_u	**arg;
4380     typval_T	*rettv;
4381     int		evaluate;
4382 {
4383     long	n;
4384     int		len;
4385     char_u	*s;
4386     int		val;
4387     char_u	*start_leader, *end_leader;
4388     int		ret = OK;
4389     char_u	*alias;
4390 
4391     /*
4392      * Initialise variable so that clear_tv() can't mistake this for a
4393      * string and free a string that isn't there.
4394      */
4395     rettv->v_type = VAR_UNKNOWN;
4396 
4397     /*
4398      * Skip '!' and '-' characters.  They are handled later.
4399      */
4400     start_leader = *arg;
4401     while (**arg == '!' || **arg == '-' || **arg == '+')
4402 	*arg = skipwhite(*arg + 1);
4403     end_leader = *arg;
4404 
4405     switch (**arg)
4406     {
4407     /*
4408      * Number constant.
4409      */
4410     case '0':
4411     case '1':
4412     case '2':
4413     case '3':
4414     case '4':
4415     case '5':
4416     case '6':
4417     case '7':
4418     case '8':
4419     case '9':
4420 		vim_str2nr(*arg, NULL, &len, TRUE, TRUE, &n, NULL);
4421 		*arg += len;
4422 		if (evaluate)
4423 		{
4424 		    rettv->v_type = VAR_NUMBER;
4425 		    rettv->vval.v_number = n;
4426 		}
4427 		break;
4428 
4429     /*
4430      * String constant: "string".
4431      */
4432     case '"':	ret = get_string_tv(arg, rettv, evaluate);
4433 		break;
4434 
4435     /*
4436      * Literal string constant: 'str''ing'.
4437      */
4438     case '\'':	ret = get_lit_string_tv(arg, rettv, evaluate);
4439 		break;
4440 
4441     /*
4442      * List: [expr, expr]
4443      */
4444     case '[':	ret = get_list_tv(arg, rettv, evaluate);
4445 		break;
4446 
4447     /*
4448      * Dictionary: {key: val, key: val}
4449      */
4450     case '{':	ret = get_dict_tv(arg, rettv, evaluate);
4451 		break;
4452 
4453     /*
4454      * Option value: &name
4455      */
4456     case '&':	ret = get_option_tv(arg, rettv, evaluate);
4457 		break;
4458 
4459     /*
4460      * Environment variable: $VAR.
4461      */
4462     case '$':	ret = get_env_tv(arg, rettv, evaluate);
4463 		break;
4464 
4465     /*
4466      * Register contents: @r.
4467      */
4468     case '@':	++*arg;
4469 		if (evaluate)
4470 		{
4471 		    rettv->v_type = VAR_STRING;
4472 		    rettv->vval.v_string = get_reg_contents(**arg, TRUE, TRUE);
4473 		}
4474 		if (**arg != NUL)
4475 		    ++*arg;
4476 		break;
4477 
4478     /*
4479      * nested expression: (expression).
4480      */
4481     case '(':	*arg = skipwhite(*arg + 1);
4482 		ret = eval1(arg, rettv, evaluate);	/* recursive! */
4483 		if (**arg == ')')
4484 		    ++*arg;
4485 		else if (ret == OK)
4486 		{
4487 		    EMSG(_("E110: Missing ')'"));
4488 		    clear_tv(rettv);
4489 		    ret = FAIL;
4490 		}
4491 		break;
4492 
4493     default:	ret = NOTDONE;
4494 		break;
4495     }
4496 
4497     if (ret == NOTDONE)
4498     {
4499 	/*
4500 	 * Must be a variable or function name.
4501 	 * Can also be a curly-braces kind of name: {expr}.
4502 	 */
4503 	s = *arg;
4504 	len = get_name_len(arg, &alias, evaluate, TRUE);
4505 	if (alias != NULL)
4506 	    s = alias;
4507 
4508 	if (len <= 0)
4509 	    ret = FAIL;
4510 	else
4511 	{
4512 	    if (**arg == '(')		/* recursive! */
4513 	    {
4514 		/* If "s" is the name of a variable of type VAR_FUNC
4515 		 * use its contents. */
4516 		s = deref_func_name(s, &len);
4517 
4518 		/* Invoke the function. */
4519 		ret = get_func_tv(s, len, rettv, arg,
4520 			  curwin->w_cursor.lnum, curwin->w_cursor.lnum,
4521 			  &len, evaluate, NULL);
4522 		/* Stop the expression evaluation when immediately
4523 		 * aborting on error, or when an interrupt occurred or
4524 		 * an exception was thrown but not caught. */
4525 		if (aborting())
4526 		{
4527 		    if (ret == OK)
4528 			clear_tv(rettv);
4529 		    ret = FAIL;
4530 		}
4531 	    }
4532 	    else if (evaluate)
4533 		ret = get_var_tv(s, len, rettv, TRUE);
4534 	    else
4535 		ret = OK;
4536 	}
4537 
4538 	if (alias != NULL)
4539 	    vim_free(alias);
4540     }
4541 
4542     *arg = skipwhite(*arg);
4543 
4544     /* Handle following '[', '(' and '.' for expr[expr], expr.name,
4545      * expr(expr). */
4546     if (ret == OK)
4547 	ret = handle_subscript(arg, rettv, evaluate, TRUE);
4548 
4549     /*
4550      * Apply logical NOT and unary '-', from right to left, ignore '+'.
4551      */
4552     if (ret == OK && evaluate && end_leader > start_leader)
4553     {
4554 	int	    error = FALSE;
4555 
4556 	val = get_tv_number_chk(rettv, &error);
4557 	if (error)
4558 	{
4559 	    clear_tv(rettv);
4560 	    ret = FAIL;
4561 	}
4562 	else
4563 	{
4564 	    while (end_leader > start_leader)
4565 	    {
4566 		--end_leader;
4567 		if (*end_leader == '!')
4568 		    val = !val;
4569 		else if (*end_leader == '-')
4570 		    val = -val;
4571 	    }
4572 	    clear_tv(rettv);
4573 	    rettv->v_type = VAR_NUMBER;
4574 	    rettv->vval.v_number = val;
4575 	}
4576     }
4577 
4578     return ret;
4579 }
4580 
4581 /*
4582  * Evaluate an "[expr]" or "[expr:expr]" index.
4583  * "*arg" points to the '['.
4584  * Returns FAIL or OK. "*arg" is advanced to after the ']'.
4585  */
4586     static int
4587 eval_index(arg, rettv, evaluate, verbose)
4588     char_u	**arg;
4589     typval_T	*rettv;
4590     int		evaluate;
4591     int		verbose;	/* give error messages */
4592 {
4593     int		empty1 = FALSE, empty2 = FALSE;
4594     typval_T	var1, var2;
4595     long	n1, n2 = 0;
4596     long	len = -1;
4597     int		range = FALSE;
4598     char_u	*s;
4599     char_u	*key = NULL;
4600 
4601     if (rettv->v_type == VAR_FUNC)
4602     {
4603 	if (verbose)
4604 	    EMSG(_("E695: Cannot index a Funcref"));
4605 	return FAIL;
4606     }
4607 
4608     if (**arg == '.')
4609     {
4610 	/*
4611 	 * dict.name
4612 	 */
4613 	key = *arg + 1;
4614 	for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
4615 	    ;
4616 	if (len == 0)
4617 	    return FAIL;
4618 	*arg = skipwhite(key + len);
4619     }
4620     else
4621     {
4622 	/*
4623 	 * something[idx]
4624 	 *
4625 	 * Get the (first) variable from inside the [].
4626 	 */
4627 	*arg = skipwhite(*arg + 1);
4628 	if (**arg == ':')
4629 	    empty1 = TRUE;
4630 	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
4631 	    return FAIL;
4632 	else if (evaluate && get_tv_string_chk(&var1) == NULL)
4633 	{
4634 	    /* not a number or string */
4635 	    clear_tv(&var1);
4636 	    return FAIL;
4637 	}
4638 
4639 	/*
4640 	 * Get the second variable from inside the [:].
4641 	 */
4642 	if (**arg == ':')
4643 	{
4644 	    range = TRUE;
4645 	    *arg = skipwhite(*arg + 1);
4646 	    if (**arg == ']')
4647 		empty2 = TRUE;
4648 	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
4649 	    {
4650 		if (!empty1)
4651 		    clear_tv(&var1);
4652 		return FAIL;
4653 	    }
4654 	    else if (evaluate && get_tv_string_chk(&var2) == NULL)
4655 	    {
4656 		/* not a number or string */
4657 		if (!empty1)
4658 		    clear_tv(&var1);
4659 		clear_tv(&var2);
4660 		return FAIL;
4661 	    }
4662 	}
4663 
4664 	/* Check for the ']'. */
4665 	if (**arg != ']')
4666 	{
4667 	    if (verbose)
4668 		EMSG(_(e_missbrac));
4669 	    clear_tv(&var1);
4670 	    if (range)
4671 		clear_tv(&var2);
4672 	    return FAIL;
4673 	}
4674 	*arg = skipwhite(*arg + 1);	/* skip the ']' */
4675     }
4676 
4677     if (evaluate)
4678     {
4679 	n1 = 0;
4680 	if (!empty1 && rettv->v_type != VAR_DICT)
4681 	{
4682 	    n1 = get_tv_number(&var1);
4683 	    clear_tv(&var1);
4684 	}
4685 	if (range)
4686 	{
4687 	    if (empty2)
4688 		n2 = -1;
4689 	    else
4690 	    {
4691 		n2 = get_tv_number(&var2);
4692 		clear_tv(&var2);
4693 	    }
4694 	}
4695 
4696 	switch (rettv->v_type)
4697 	{
4698 	    case VAR_NUMBER:
4699 	    case VAR_STRING:
4700 		s = get_tv_string(rettv);
4701 		len = (long)STRLEN(s);
4702 		if (range)
4703 		{
4704 		    /* The resulting variable is a substring.  If the indexes
4705 		     * are out of range the result is empty. */
4706 		    if (n1 < 0)
4707 		    {
4708 			n1 = len + n1;
4709 			if (n1 < 0)
4710 			    n1 = 0;
4711 		    }
4712 		    if (n2 < 0)
4713 			n2 = len + n2;
4714 		    else if (n2 >= len)
4715 			n2 = len;
4716 		    if (n1 >= len || n2 < 0 || n1 > n2)
4717 			s = NULL;
4718 		    else
4719 			s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
4720 		}
4721 		else
4722 		{
4723 		    /* The resulting variable is a string of a single
4724 		     * character.  If the index is too big or negative the
4725 		     * result is empty. */
4726 		    if (n1 >= len || n1 < 0)
4727 			s = NULL;
4728 		    else
4729 			s = vim_strnsave(s + n1, 1);
4730 		}
4731 		clear_tv(rettv);
4732 		rettv->v_type = VAR_STRING;
4733 		rettv->vval.v_string = s;
4734 		break;
4735 
4736 	    case VAR_LIST:
4737 		len = list_len(rettv->vval.v_list);
4738 		if (n1 < 0)
4739 		    n1 = len + n1;
4740 		if (!empty1 && (n1 < 0 || n1 >= len))
4741 		{
4742 		    if (verbose)
4743 			EMSGN(_(e_listidx), n1);
4744 		    return FAIL;
4745 		}
4746 		if (range)
4747 		{
4748 		    list_T	*l;
4749 		    listitem_T	*item;
4750 
4751 		    if (n2 < 0)
4752 			n2 = len + n2;
4753 		    if (!empty2 && (n2 < 0 || n2 >= len || n2 + 1 < n1))
4754 		    {
4755 			if (verbose)
4756 			    EMSGN(_(e_listidx), n2);
4757 			return FAIL;
4758 		    }
4759 		    l = list_alloc();
4760 		    if (l == NULL)
4761 			return FAIL;
4762 		    for (item = list_find(rettv->vval.v_list, n1);
4763 							       n1 <= n2; ++n1)
4764 		    {
4765 			if (list_append_tv(l, &item->li_tv) == FAIL)
4766 			{
4767 			    list_free(l);
4768 			    return FAIL;
4769 			}
4770 			item = item->li_next;
4771 		    }
4772 		    clear_tv(rettv);
4773 		    rettv->v_type = VAR_LIST;
4774 		    rettv->vval.v_list = l;
4775 		    ++l->lv_refcount;
4776 		}
4777 		else
4778 		{
4779 		    copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv,
4780 								       &var1);
4781 		    clear_tv(rettv);
4782 		    *rettv = var1;
4783 		}
4784 		break;
4785 
4786 	    case VAR_DICT:
4787 		if (range)
4788 		{
4789 		    if (verbose)
4790 			EMSG(_(e_dictrange));
4791 		    if (len == -1)
4792 			clear_tv(&var1);
4793 		    return FAIL;
4794 		}
4795 		{
4796 		    dictitem_T	*item;
4797 
4798 		    if (len == -1)
4799 		    {
4800 			key = get_tv_string(&var1);
4801 			if (*key == NUL)
4802 			{
4803 			    if (verbose)
4804 				EMSG(_(e_emptykey));
4805 			    clear_tv(&var1);
4806 			    return FAIL;
4807 			}
4808 		    }
4809 
4810 		    item = dict_find(rettv->vval.v_dict, key, (int)len);
4811 
4812 		    if (item == NULL && verbose)
4813 			EMSG2(_(e_dictkey), key);
4814 		    if (len == -1)
4815 			clear_tv(&var1);
4816 		    if (item == NULL)
4817 			return FAIL;
4818 
4819 		    copy_tv(&item->di_tv, &var1);
4820 		    clear_tv(rettv);
4821 		    *rettv = var1;
4822 		}
4823 		break;
4824 	}
4825     }
4826 
4827     return OK;
4828 }
4829 
4830 /*
4831  * Get an option value.
4832  * "arg" points to the '&' or '+' before the option name.
4833  * "arg" is advanced to character after the option name.
4834  * Return OK or FAIL.
4835  */
4836     static int
4837 get_option_tv(arg, rettv, evaluate)
4838     char_u	**arg;
4839     typval_T	*rettv;	/* when NULL, only check if option exists */
4840     int		evaluate;
4841 {
4842     char_u	*option_end;
4843     long	numval;
4844     char_u	*stringval;
4845     int		opt_type;
4846     int		c;
4847     int		working = (**arg == '+');    /* has("+option") */
4848     int		ret = OK;
4849     int		opt_flags;
4850 
4851     /*
4852      * Isolate the option name and find its value.
4853      */
4854     option_end = find_option_end(arg, &opt_flags);
4855     if (option_end == NULL)
4856     {
4857 	if (rettv != NULL)
4858 	    EMSG2(_("E112: Option name missing: %s"), *arg);
4859 	return FAIL;
4860     }
4861 
4862     if (!evaluate)
4863     {
4864 	*arg = option_end;
4865 	return OK;
4866     }
4867 
4868     c = *option_end;
4869     *option_end = NUL;
4870     opt_type = get_option_value(*arg, &numval,
4871 			       rettv == NULL ? NULL : &stringval, opt_flags);
4872 
4873     if (opt_type == -3)			/* invalid name */
4874     {
4875 	if (rettv != NULL)
4876 	    EMSG2(_("E113: Unknown option: %s"), *arg);
4877 	ret = FAIL;
4878     }
4879     else if (rettv != NULL)
4880     {
4881 	if (opt_type == -2)		/* hidden string option */
4882 	{
4883 	    rettv->v_type = VAR_STRING;
4884 	    rettv->vval.v_string = NULL;
4885 	}
4886 	else if (opt_type == -1)	/* hidden number option */
4887 	{
4888 	    rettv->v_type = VAR_NUMBER;
4889 	    rettv->vval.v_number = 0;
4890 	}
4891 	else if (opt_type == 1)		/* number option */
4892 	{
4893 	    rettv->v_type = VAR_NUMBER;
4894 	    rettv->vval.v_number = numval;
4895 	}
4896 	else				/* string option */
4897 	{
4898 	    rettv->v_type = VAR_STRING;
4899 	    rettv->vval.v_string = stringval;
4900 	}
4901     }
4902     else if (working && (opt_type == -2 || opt_type == -1))
4903 	ret = FAIL;
4904 
4905     *option_end = c;		    /* put back for error messages */
4906     *arg = option_end;
4907 
4908     return ret;
4909 }
4910 
4911 /*
4912  * Allocate a variable for a string constant.
4913  * Return OK or FAIL.
4914  */
4915     static int
4916 get_string_tv(arg, rettv, evaluate)
4917     char_u	**arg;
4918     typval_T	*rettv;
4919     int		evaluate;
4920 {
4921     char_u	*p;
4922     char_u	*name;
4923     int		extra = 0;
4924 
4925     /*
4926      * Find the end of the string, skipping backslashed characters.
4927      */
4928     for (p = *arg + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
4929     {
4930 	if (*p == '\\' && p[1] != NUL)
4931 	{
4932 	    ++p;
4933 	    /* A "\<x>" form occupies at least 4 characters, and produces up
4934 	     * to 6 characters: reserve space for 2 extra */
4935 	    if (*p == '<')
4936 		extra += 2;
4937 	}
4938     }
4939 
4940     if (*p != '"')
4941     {
4942 	EMSG2(_("E114: Missing quote: %s"), *arg);
4943 	return FAIL;
4944     }
4945 
4946     /* If only parsing, set *arg and return here */
4947     if (!evaluate)
4948     {
4949 	*arg = p + 1;
4950 	return OK;
4951     }
4952 
4953     /*
4954      * Copy the string into allocated memory, handling backslashed
4955      * characters.
4956      */
4957     name = alloc((unsigned)(p - *arg + extra));
4958     if (name == NULL)
4959 	return FAIL;
4960     rettv->v_type = VAR_STRING;
4961     rettv->vval.v_string = name;
4962 
4963     for (p = *arg + 1; *p != NUL && *p != '"'; )
4964     {
4965 	if (*p == '\\')
4966 	{
4967 	    switch (*++p)
4968 	    {
4969 		case 'b': *name++ = BS; ++p; break;
4970 		case 'e': *name++ = ESC; ++p; break;
4971 		case 'f': *name++ = FF; ++p; break;
4972 		case 'n': *name++ = NL; ++p; break;
4973 		case 'r': *name++ = CAR; ++p; break;
4974 		case 't': *name++ = TAB; ++p; break;
4975 
4976 		case 'X': /* hex: "\x1", "\x12" */
4977 		case 'x':
4978 		case 'u': /* Unicode: "\u0023" */
4979 		case 'U':
4980 			  if (vim_isxdigit(p[1]))
4981 			  {
4982 			      int	n, nr;
4983 			      int	c = toupper(*p);
4984 
4985 			      if (c == 'X')
4986 				  n = 2;
4987 			      else
4988 				  n = 4;
4989 			      nr = 0;
4990 			      while (--n >= 0 && vim_isxdigit(p[1]))
4991 			      {
4992 				  ++p;
4993 				  nr = (nr << 4) + hex2nr(*p);
4994 			      }
4995 			      ++p;
4996 #ifdef FEAT_MBYTE
4997 			      /* For "\u" store the number according to
4998 			       * 'encoding'. */
4999 			      if (c != 'X')
5000 				  name += (*mb_char2bytes)(nr, name);
5001 			      else
5002 #endif
5003 				  *name++ = nr;
5004 			  }
5005 			  break;
5006 
5007 			  /* octal: "\1", "\12", "\123" */
5008 		case '0':
5009 		case '1':
5010 		case '2':
5011 		case '3':
5012 		case '4':
5013 		case '5':
5014 		case '6':
5015 		case '7': *name = *p++ - '0';
5016 			  if (*p >= '0' && *p <= '7')
5017 			  {
5018 			      *name = (*name << 3) + *p++ - '0';
5019 			      if (*p >= '0' && *p <= '7')
5020 				  *name = (*name << 3) + *p++ - '0';
5021 			  }
5022 			  ++name;
5023 			  break;
5024 
5025 			    /* Special key, e.g.: "\<C-W>" */
5026 		case '<': extra = trans_special(&p, name, TRUE);
5027 			  if (extra != 0)
5028 			  {
5029 			      name += extra;
5030 			      break;
5031 			  }
5032 			  /* FALLTHROUGH */
5033 
5034 		default:  MB_COPY_CHAR(p, name);
5035 			  break;
5036 	    }
5037 	}
5038 	else
5039 	    MB_COPY_CHAR(p, name);
5040 
5041     }
5042     *name = NUL;
5043     *arg = p + 1;
5044 
5045     return OK;
5046 }
5047 
5048 /*
5049  * Allocate a variable for a 'str''ing' constant.
5050  * Return OK or FAIL.
5051  */
5052     static int
5053 get_lit_string_tv(arg, rettv, evaluate)
5054     char_u	**arg;
5055     typval_T	*rettv;
5056     int		evaluate;
5057 {
5058     char_u	*p;
5059     char_u	*str;
5060     int		reduce = 0;
5061 
5062     /*
5063      * Find the end of the string, skipping ''.
5064      */
5065     for (p = *arg + 1; *p != NUL; mb_ptr_adv(p))
5066     {
5067 	if (*p == '\'')
5068 	{
5069 	    if (p[1] != '\'')
5070 		break;
5071 	    ++reduce;
5072 	    ++p;
5073 	}
5074     }
5075 
5076     if (*p != '\'')
5077     {
5078 	EMSG2(_("E115: Missing quote: %s"), *arg);
5079 	return FAIL;
5080     }
5081 
5082     /* If only parsing return after setting "*arg" */
5083     if (!evaluate)
5084     {
5085 	*arg = p + 1;
5086 	return OK;
5087     }
5088 
5089     /*
5090      * Copy the string into allocated memory, handling '' to ' reduction.
5091      */
5092     str = alloc((unsigned)((p - *arg) - reduce));
5093     if (str == NULL)
5094 	return FAIL;
5095     rettv->v_type = VAR_STRING;
5096     rettv->vval.v_string = str;
5097 
5098     for (p = *arg + 1; *p != NUL; )
5099     {
5100 	if (*p == '\'')
5101 	{
5102 	    if (p[1] != '\'')
5103 		break;
5104 	    ++p;
5105 	}
5106 	MB_COPY_CHAR(p, str);
5107     }
5108     *str = NUL;
5109     *arg = p + 1;
5110 
5111     return OK;
5112 }
5113 
5114 /*
5115  * Allocate a variable for a List and fill it from "*arg".
5116  * Return OK or FAIL.
5117  */
5118     static int
5119 get_list_tv(arg, rettv, evaluate)
5120     char_u	**arg;
5121     typval_T	*rettv;
5122     int		evaluate;
5123 {
5124     list_T	*l = NULL;
5125     typval_T	tv;
5126     listitem_T	*item;
5127 
5128     if (evaluate)
5129     {
5130 	l = list_alloc();
5131 	if (l == NULL)
5132 	    return FAIL;
5133     }
5134 
5135     *arg = skipwhite(*arg + 1);
5136     while (**arg != ']' && **arg != NUL)
5137     {
5138 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
5139 	    goto failret;
5140 	if (evaluate)
5141 	{
5142 	    item = listitem_alloc();
5143 	    if (item != NULL)
5144 	    {
5145 		item->li_tv = tv;
5146 		item->li_tv.v_lock = 0;
5147 		list_append(l, item);
5148 	    }
5149 	    else
5150 		clear_tv(&tv);
5151 	}
5152 
5153 	if (**arg == ']')
5154 	    break;
5155 	if (**arg != ',')
5156 	{
5157 	    EMSG2(_("E696: Missing comma in List: %s"), *arg);
5158 	    goto failret;
5159 	}
5160 	*arg = skipwhite(*arg + 1);
5161     }
5162 
5163     if (**arg != ']')
5164     {
5165 	EMSG2(_("E697: Missing end of List ']': %s"), *arg);
5166 failret:
5167 	if (evaluate)
5168 	    list_free(l);
5169 	return FAIL;
5170     }
5171 
5172     *arg = skipwhite(*arg + 1);
5173     if (evaluate)
5174     {
5175 	rettv->v_type = VAR_LIST;
5176 	rettv->vval.v_list = l;
5177 	++l->lv_refcount;
5178     }
5179 
5180     return OK;
5181 }
5182 
5183 /*
5184  * Allocate an empty header for a list.
5185  * Caller should take care of the reference count.
5186  */
5187     static list_T *
5188 list_alloc()
5189 {
5190     list_T  *l;
5191 
5192     l = (list_T *)alloc_clear(sizeof(list_T));
5193     if (l != NULL)
5194     {
5195 	/* Prepend the list to the list of lists for garbage collection. */
5196 	if (first_list != NULL)
5197 	    first_list->lv_used_prev = l;
5198 	l->lv_used_prev = NULL;
5199 	l->lv_used_next = first_list;
5200 	first_list = l;
5201     }
5202     return l;
5203 }
5204 
5205 /*
5206  * Unreference a list: decrement the reference count and free it when it
5207  * becomes zero.
5208  */
5209     void
5210 list_unref(l)
5211     list_T *l;
5212 {
5213     if (l != NULL && l->lv_refcount != DEL_REFCOUNT && --l->lv_refcount <= 0)
5214 	list_free(l);
5215 }
5216 
5217 /*
5218  * Free a list, including all items it points to.
5219  * Ignores the reference count.
5220  */
5221     static void
5222 list_free(l)
5223     list_T *l;
5224 {
5225     listitem_T *item;
5226 
5227     /* Avoid that recursive reference to the list frees us again. */
5228     l->lv_refcount = DEL_REFCOUNT;
5229 
5230     /* Remove the list from the list of lists for garbage collection. */
5231     if (l->lv_used_prev == NULL)
5232 	first_list = l->lv_used_next;
5233     else
5234 	l->lv_used_prev->lv_used_next = l->lv_used_next;
5235     if (l->lv_used_next != NULL)
5236 	l->lv_used_next->lv_used_prev = l->lv_used_prev;
5237 
5238     for (item = l->lv_first; item != NULL; item = l->lv_first)
5239     {
5240 	/* Remove the item before deleting it. */
5241 	l->lv_first = item->li_next;
5242 	listitem_free(item);
5243     }
5244     vim_free(l);
5245 }
5246 
5247 /*
5248  * Allocate a list item.
5249  */
5250     static listitem_T *
5251 listitem_alloc()
5252 {
5253     return (listitem_T *)alloc(sizeof(listitem_T));
5254 }
5255 
5256 /*
5257  * Free a list item.  Also clears the value.  Does not notify watchers.
5258  */
5259     static void
5260 listitem_free(item)
5261     listitem_T *item;
5262 {
5263     clear_tv(&item->li_tv);
5264     vim_free(item);
5265 }
5266 
5267 /*
5268  * Remove a list item from a List and free it.  Also clears the value.
5269  */
5270     static void
5271 listitem_remove(l, item)
5272     list_T  *l;
5273     listitem_T *item;
5274 {
5275     list_remove(l, item, item);
5276     listitem_free(item);
5277 }
5278 
5279 /*
5280  * Get the number of items in a list.
5281  */
5282     static long
5283 list_len(l)
5284     list_T	*l;
5285 {
5286     if (l == NULL)
5287 	return 0L;
5288     return l->lv_len;
5289 }
5290 
5291 /*
5292  * Return TRUE when two lists have exactly the same values.
5293  */
5294     static int
5295 list_equal(l1, l2, ic)
5296     list_T	*l1;
5297     list_T	*l2;
5298     int		ic;	/* ignore case for strings */
5299 {
5300     listitem_T	*item1, *item2;
5301 
5302     if (list_len(l1) != list_len(l2))
5303 	return FALSE;
5304 
5305     for (item1 = l1->lv_first, item2 = l2->lv_first;
5306 	    item1 != NULL && item2 != NULL;
5307 			       item1 = item1->li_next, item2 = item2->li_next)
5308 	if (!tv_equal(&item1->li_tv, &item2->li_tv, ic))
5309 	    return FALSE;
5310     return item1 == NULL && item2 == NULL;
5311 }
5312 
5313 /*
5314  * Return TRUE when two dictionaries have exactly the same key/values.
5315  */
5316     static int
5317 dict_equal(d1, d2, ic)
5318     dict_T	*d1;
5319     dict_T	*d2;
5320     int		ic;	/* ignore case for strings */
5321 {
5322     hashitem_T	*hi;
5323     dictitem_T	*item2;
5324     int		todo;
5325 
5326     if (dict_len(d1) != dict_len(d2))
5327 	return FALSE;
5328 
5329     todo = d1->dv_hashtab.ht_used;
5330     for (hi = d1->dv_hashtab.ht_array; todo > 0; ++hi)
5331     {
5332 	if (!HASHITEM_EMPTY(hi))
5333 	{
5334 	    item2 = dict_find(d2, hi->hi_key, -1);
5335 	    if (item2 == NULL)
5336 		return FALSE;
5337 	    if (!tv_equal(&HI2DI(hi)->di_tv, &item2->di_tv, ic))
5338 		return FALSE;
5339 	    --todo;
5340 	}
5341     }
5342     return TRUE;
5343 }
5344 
5345 /*
5346  * Return TRUE if "tv1" and "tv2" have the same value.
5347  * Compares the items just like "==" would compare them, but strings and
5348  * numbers are different.
5349  */
5350     static int
5351 tv_equal(tv1, tv2, ic)
5352     typval_T *tv1;
5353     typval_T *tv2;
5354     int	    ic;	    /* ignore case */
5355 {
5356     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
5357     char_u	*s1, *s2;
5358 
5359     if (tv1->v_type != tv2->v_type)
5360 	return FALSE;
5361 
5362     switch (tv1->v_type)
5363     {
5364 	case VAR_LIST:
5365 	    /* recursive! */
5366 	    return list_equal(tv1->vval.v_list, tv2->vval.v_list, ic);
5367 
5368 	case VAR_DICT:
5369 	    /* recursive! */
5370 	    return dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic);
5371 
5372 	case VAR_FUNC:
5373 	    return (tv1->vval.v_string != NULL
5374 		    && tv2->vval.v_string != NULL
5375 		    && STRCMP(tv1->vval.v_string, tv2->vval.v_string) == 0);
5376 
5377 	case VAR_NUMBER:
5378 	    return tv1->vval.v_number == tv2->vval.v_number;
5379 
5380 	case VAR_STRING:
5381 	    s1 = get_tv_string_buf(tv1, buf1);
5382 	    s2 = get_tv_string_buf(tv2, buf2);
5383 	    return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
5384     }
5385 
5386     EMSG2(_(e_intern2), "tv_equal()");
5387     return TRUE;
5388 }
5389 
5390 /*
5391  * Locate item with index "n" in list "l" and return it.
5392  * A negative index is counted from the end; -1 is the last item.
5393  * Returns NULL when "n" is out of range.
5394  */
5395     static listitem_T *
5396 list_find(l, n)
5397     list_T	*l;
5398     long	n;
5399 {
5400     listitem_T	*item;
5401     long	idx;
5402 
5403     if (l == NULL)
5404 	return NULL;
5405 
5406     /* Negative index is relative to the end. */
5407     if (n < 0)
5408 	n = l->lv_len + n;
5409 
5410     /* Check for index out of range. */
5411     if (n < 0 || n >= l->lv_len)
5412 	return NULL;
5413 
5414     /* When there is a cached index may start search from there. */
5415     if (l->lv_idx_item != NULL)
5416     {
5417 	if (n < l->lv_idx / 2)
5418 	{
5419 	    /* closest to the start of the list */
5420 	    item = l->lv_first;
5421 	    idx = 0;
5422 	}
5423 	else if (n > (l->lv_idx + l->lv_len) / 2)
5424 	{
5425 	    /* closest to the end of the list */
5426 	    item = l->lv_last;
5427 	    idx = l->lv_len - 1;
5428 	}
5429 	else
5430 	{
5431 	    /* closest to the cached index */
5432 	    item = l->lv_idx_item;
5433 	    idx = l->lv_idx;
5434 	}
5435     }
5436     else
5437     {
5438 	if (n < l->lv_len / 2)
5439 	{
5440 	    /* closest to the start of the list */
5441 	    item = l->lv_first;
5442 	    idx = 0;
5443 	}
5444 	else
5445 	{
5446 	    /* closest to the end of the list */
5447 	    item = l->lv_last;
5448 	    idx = l->lv_len - 1;
5449 	}
5450     }
5451 
5452     while (n > idx)
5453     {
5454 	/* search forward */
5455 	item = item->li_next;
5456 	++idx;
5457     }
5458     while (n < idx)
5459     {
5460 	/* search backward */
5461 	item = item->li_prev;
5462 	--idx;
5463     }
5464 
5465     /* cache the used index */
5466     l->lv_idx = idx;
5467     l->lv_idx_item = item;
5468 
5469     return item;
5470 }
5471 
5472 /*
5473  * Locate "item" list "l" and return its index.
5474  * Returns -1 when "item" is not in the list.
5475  */
5476     static long
5477 list_idx_of_item(l, item)
5478     list_T	*l;
5479     listitem_T	*item;
5480 {
5481     long	idx = 0;
5482     listitem_T	*li;
5483 
5484     if (l == NULL)
5485 	return -1;
5486     idx = 0;
5487     for (li = l->lv_first; li != NULL && li != item; li = li->li_next)
5488 	++idx;
5489     if (li == NULL)
5490 	return -1;
5491     return idx;
5492 }
5493 
5494 /*
5495  * Append item "item" to the end of list "l".
5496  */
5497     static void
5498 list_append(l, item)
5499     list_T	*l;
5500     listitem_T	*item;
5501 {
5502     if (l->lv_last == NULL)
5503     {
5504 	/* empty list */
5505 	l->lv_first = item;
5506 	l->lv_last = item;
5507 	item->li_prev = NULL;
5508     }
5509     else
5510     {
5511 	l->lv_last->li_next = item;
5512 	item->li_prev = l->lv_last;
5513 	l->lv_last = item;
5514     }
5515     ++l->lv_len;
5516     item->li_next = NULL;
5517 }
5518 
5519 /*
5520  * Append typval_T "tv" to the end of list "l".
5521  * Return FAIL when out of memory.
5522  */
5523     static int
5524 list_append_tv(l, tv)
5525     list_T	*l;
5526     typval_T	*tv;
5527 {
5528     listitem_T	*li = listitem_alloc();
5529 
5530     if (li == NULL)
5531 	return FAIL;
5532     copy_tv(tv, &li->li_tv);
5533     list_append(l, li);
5534     return OK;
5535 }
5536 
5537 /*
5538  * Add a dictionary to a list.  Used by getqflist().
5539  * Return FAIL when out of memory.
5540  */
5541     int
5542 list_append_dict(list, dict)
5543     list_T	*list;
5544     dict_T	*dict;
5545 {
5546     listitem_T	*li = listitem_alloc();
5547 
5548     if (li == NULL)
5549 	return FAIL;
5550     li->li_tv.v_type = VAR_DICT;
5551     li->li_tv.v_lock = 0;
5552     li->li_tv.vval.v_dict = dict;
5553     list_append(list, li);
5554     ++dict->dv_refcount;
5555     return OK;
5556 }
5557 
5558 /*
5559  * Make a copy of "str" and append it as an item to list "l".
5560  * Returns FAIL when out of memory.
5561  */
5562     static int
5563 list_append_string(l, str)
5564     list_T	*l;
5565     char_u	*str;
5566 {
5567     listitem_T *li = listitem_alloc();
5568 
5569     if (li == NULL)
5570 	return FAIL;
5571     list_append(l, li);
5572     li->li_tv.v_type = VAR_STRING;
5573     li->li_tv.v_lock = 0;
5574     if ((li->li_tv.vval.v_string = vim_strsave(str)) == NULL)
5575 	return FAIL;
5576     return OK;
5577 }
5578 
5579 /*
5580  * Insert typval_T "tv" in list "l" before "item".
5581  * If "item" is NULL append at the end.
5582  * Return FAIL when out of memory.
5583  */
5584     static int
5585 list_insert_tv(l, tv, item)
5586     list_T	*l;
5587     typval_T	*tv;
5588     listitem_T	*item;
5589 {
5590     listitem_T	*ni = listitem_alloc();
5591 
5592     if (ni == NULL)
5593 	return FAIL;
5594     copy_tv(tv, &ni->li_tv);
5595     if (item == NULL)
5596 	/* Append new item at end of list. */
5597 	list_append(l, ni);
5598     else
5599     {
5600 	/* Insert new item before existing item. */
5601 	ni->li_prev = item->li_prev;
5602 	ni->li_next = item;
5603 	if (item->li_prev == NULL)
5604 	{
5605 	    l->lv_first = ni;
5606 	    ++l->lv_idx;
5607 	}
5608 	else
5609 	{
5610 	    item->li_prev->li_next = ni;
5611 	    l->lv_idx_item = NULL;
5612 	}
5613 	item->li_prev = ni;
5614 	++l->lv_len;
5615     }
5616     return OK;
5617 }
5618 
5619 /*
5620  * Extend "l1" with "l2".
5621  * If "bef" is NULL append at the end, otherwise insert before this item.
5622  * Returns FAIL when out of memory.
5623  */
5624     static int
5625 list_extend(l1, l2, bef)
5626     list_T	*l1;
5627     list_T	*l2;
5628     listitem_T	*bef;
5629 {
5630     listitem_T	*item;
5631 
5632     for (item = l2->lv_first; item != NULL; item = item->li_next)
5633 	if (list_insert_tv(l1, &item->li_tv, bef) == FAIL)
5634 	    return FAIL;
5635     return OK;
5636 }
5637 
5638 /*
5639  * Concatenate lists "l1" and "l2" into a new list, stored in "tv".
5640  * Return FAIL when out of memory.
5641  */
5642     static int
5643 list_concat(l1, l2, tv)
5644     list_T	*l1;
5645     list_T	*l2;
5646     typval_T	*tv;
5647 {
5648     list_T	*l;
5649 
5650     /* make a copy of the first list. */
5651     l = list_copy(l1, FALSE, 0);
5652     if (l == NULL)
5653 	return FAIL;
5654     tv->v_type = VAR_LIST;
5655     tv->vval.v_list = l;
5656 
5657     /* append all items from the second list */
5658     return list_extend(l, l2, NULL);
5659 }
5660 
5661 /*
5662  * Make a copy of list "orig".  Shallow if "deep" is FALSE.
5663  * The refcount of the new list is set to 1.
5664  * See item_copy() for "copyID".
5665  * Returns NULL when out of memory.
5666  */
5667     static list_T *
5668 list_copy(orig, deep, copyID)
5669     list_T	*orig;
5670     int		deep;
5671     int		copyID;
5672 {
5673     list_T	*copy;
5674     listitem_T	*item;
5675     listitem_T	*ni;
5676 
5677     if (orig == NULL)
5678 	return NULL;
5679 
5680     copy = list_alloc();
5681     if (copy != NULL)
5682     {
5683 	if (copyID != 0)
5684 	{
5685 	    /* Do this before adding the items, because one of the items may
5686 	     * refer back to this list. */
5687 	    orig->lv_copyID = copyID;
5688 	    orig->lv_copylist = copy;
5689 	}
5690 	for (item = orig->lv_first; item != NULL && !got_int;
5691 							 item = item->li_next)
5692 	{
5693 	    ni = listitem_alloc();
5694 	    if (ni == NULL)
5695 		break;
5696 	    if (deep)
5697 	    {
5698 		if (item_copy(&item->li_tv, &ni->li_tv, deep, copyID) == FAIL)
5699 		{
5700 		    vim_free(ni);
5701 		    break;
5702 		}
5703 	    }
5704 	    else
5705 		copy_tv(&item->li_tv, &ni->li_tv);
5706 	    list_append(copy, ni);
5707 	}
5708 	++copy->lv_refcount;
5709 	if (item != NULL)
5710 	{
5711 	    list_unref(copy);
5712 	    copy = NULL;
5713 	}
5714     }
5715 
5716     return copy;
5717 }
5718 
5719 /*
5720  * Remove items "item" to "item2" from list "l".
5721  * Does not free the listitem or the value!
5722  */
5723     static void
5724 list_remove(l, item, item2)
5725     list_T	*l;
5726     listitem_T	*item;
5727     listitem_T	*item2;
5728 {
5729     listitem_T	*ip;
5730 
5731     /* notify watchers */
5732     for (ip = item; ip != NULL; ip = ip->li_next)
5733     {
5734 	--l->lv_len;
5735 	list_fix_watch(l, ip);
5736 	if (ip == item2)
5737 	    break;
5738     }
5739 
5740     if (item2->li_next == NULL)
5741 	l->lv_last = item->li_prev;
5742     else
5743 	item2->li_next->li_prev = item->li_prev;
5744     if (item->li_prev == NULL)
5745 	l->lv_first = item2->li_next;
5746     else
5747 	item->li_prev->li_next = item2->li_next;
5748     l->lv_idx_item = NULL;
5749 }
5750 
5751 /*
5752  * Return an allocated string with the string representation of a list.
5753  * May return NULL.
5754  */
5755     static char_u *
5756 list2string(tv)
5757     typval_T	*tv;
5758 {
5759     garray_T	ga;
5760 
5761     if (tv->vval.v_list == NULL)
5762 	return NULL;
5763     ga_init2(&ga, (int)sizeof(char), 80);
5764     ga_append(&ga, '[');
5765     if (list_join(&ga, tv->vval.v_list, (char_u *)", ", FALSE) == FAIL)
5766     {
5767 	vim_free(ga.ga_data);
5768 	return NULL;
5769     }
5770     ga_append(&ga, ']');
5771     ga_append(&ga, NUL);
5772     return (char_u *)ga.ga_data;
5773 }
5774 
5775 /*
5776  * Join list "l" into a string in "*gap", using separator "sep".
5777  * When "echo" is TRUE use String as echoed, otherwise as inside a List.
5778  * Return FAIL or OK.
5779  */
5780     static int
5781 list_join(gap, l, sep, echo)
5782     garray_T	*gap;
5783     list_T	*l;
5784     char_u	*sep;
5785     int		echo;
5786 {
5787     int		first = TRUE;
5788     char_u	*tofree;
5789     char_u	numbuf[NUMBUFLEN];
5790     listitem_T	*item;
5791     char_u	*s;
5792 
5793     for (item = l->lv_first; item != NULL && !got_int; item = item->li_next)
5794     {
5795 	if (first)
5796 	    first = FALSE;
5797 	else
5798 	    ga_concat(gap, sep);
5799 
5800 	if (echo)
5801 	    s = echo_string(&item->li_tv, &tofree, numbuf);
5802 	else
5803 	    s = tv2string(&item->li_tv, &tofree, numbuf);
5804 	if (s != NULL)
5805 	    ga_concat(gap, s);
5806 	vim_free(tofree);
5807 	if (s == NULL)
5808 	    return FAIL;
5809     }
5810     return OK;
5811 }
5812 
5813 /*
5814  * Garbage collection for lists and dictionaries.
5815  *
5816  * We use reference counts to be able to free most items right away when they
5817  * are no longer used.  But for composite items it's possible that it becomes
5818  * unused while the reference count is > 0: When there is a recursive
5819  * reference.  Example:
5820  *	:let l = [1, 2, 3]
5821  *	:let d = {9: l}
5822  *	:let l[1] = d
5823  *
5824  * Since this is quite unusual we handle this with garbage collection: every
5825  * once in a while find out which lists and dicts are not referenced from any
5826  * variable.
5827  *
5828  * Here is a good reference text about garbage collection (refers to Python
5829  * but it applies to all reference-counting mechanisms):
5830  *	http://python.ca/nas/python/gc/
5831  */
5832 
5833 /*
5834  * Do garbage collection for lists and dicts.
5835  * Return TRUE if some memory was freed.
5836  */
5837     int
5838 garbage_collect()
5839 {
5840     dict_T	*dd;
5841     list_T	*ll;
5842     int		copyID = ++current_copyID;
5843     buf_T	*buf;
5844     win_T	*wp;
5845     int		i;
5846     funccall_T	*fc;
5847     int		did_free = FALSE;
5848 
5849     /*
5850      * 1. Go through all accessible variables and mark all lists and dicts
5851      *    with copyID.
5852      */
5853     /* script-local variables */
5854     for (i = 1; i <= ga_scripts.ga_len; ++i)
5855 	set_ref_in_ht(&SCRIPT_VARS(i), copyID);
5856 
5857     /* buffer-local variables */
5858     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
5859 	set_ref_in_ht(&buf->b_vars.dv_hashtab, copyID);
5860 
5861     /* window-local variables */
5862     FOR_ALL_WINDOWS(wp)
5863 	set_ref_in_ht(&wp->w_vars.dv_hashtab, copyID);
5864 
5865     /* global variables */
5866     set_ref_in_ht(&globvarht, copyID);
5867 
5868     /* function-local variables */
5869     for (fc = current_funccal; fc != NULL; fc = fc->caller)
5870     {
5871 	set_ref_in_ht(&fc->l_vars.dv_hashtab, copyID);
5872 	set_ref_in_ht(&fc->l_avars.dv_hashtab, copyID);
5873     }
5874 
5875     /*
5876      * 2. Go through the list of dicts and free items without the copyID.
5877      */
5878     for (dd = first_dict; dd != NULL; )
5879 	if (dd->dv_copyID != copyID)
5880 	{
5881 	    dict_free(dd);
5882 	    did_free = TRUE;
5883 
5884 	    /* restart, next dict may also have been freed */
5885 	    dd = first_dict;
5886 	}
5887 	else
5888 	    dd = dd->dv_used_next;
5889 
5890     /*
5891      * 3. Go through the list of lists and free items without the copyID.
5892      *    But don't free a list that has a watcher (used in a for loop), these
5893      *    are not referenced anywhere.
5894      */
5895     for (ll = first_list; ll != NULL; )
5896 	if (ll->lv_copyID != copyID && ll->lv_watch == NULL)
5897 	{
5898 	    list_free(ll);
5899 	    did_free = TRUE;
5900 
5901 	    /* restart, next list may also have been freed */
5902 	    ll = first_list;
5903 	}
5904 	else
5905 	    ll = ll->lv_used_next;
5906 
5907     return did_free;
5908 }
5909 
5910 /*
5911  * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
5912  */
5913     static void
5914 set_ref_in_ht(ht, copyID)
5915     hashtab_T	*ht;
5916     int		copyID;
5917 {
5918     int		todo;
5919     hashitem_T	*hi;
5920 
5921     todo = ht->ht_used;
5922     for (hi = ht->ht_array; todo > 0; ++hi)
5923 	if (!HASHITEM_EMPTY(hi))
5924 	{
5925 	    --todo;
5926 	    set_ref_in_item(&HI2DI(hi)->di_tv, copyID);
5927 	}
5928 }
5929 
5930 /*
5931  * Mark all lists and dicts referenced through list "l" with "copyID".
5932  */
5933     static void
5934 set_ref_in_list(l, copyID)
5935     list_T	*l;
5936     int		copyID;
5937 {
5938     listitem_T *li;
5939 
5940     for (li = l->lv_first; li != NULL; li = li->li_next)
5941 	set_ref_in_item(&li->li_tv, copyID);
5942 }
5943 
5944 /*
5945  * Mark all lists and dicts referenced through typval "tv" with "copyID".
5946  */
5947     static void
5948 set_ref_in_item(tv, copyID)
5949     typval_T	*tv;
5950     int		copyID;
5951 {
5952     dict_T	*dd;
5953     list_T	*ll;
5954 
5955     switch (tv->v_type)
5956     {
5957 	case VAR_DICT:
5958 	    dd = tv->vval.v_dict;
5959 	    if (dd->dv_copyID != copyID)
5960 	    {
5961 		/* Didn't see this dict yet. */
5962 		dd->dv_copyID = copyID;
5963 		set_ref_in_ht(&dd->dv_hashtab, copyID);
5964 	    }
5965 	    break;
5966 
5967 	case VAR_LIST:
5968 	    ll = tv->vval.v_list;
5969 	    if (ll->lv_copyID != copyID)
5970 	    {
5971 		/* Didn't see this list yet. */
5972 		ll->lv_copyID = copyID;
5973 		set_ref_in_list(ll, copyID);
5974 	    }
5975 	    break;
5976     }
5977     return;
5978 }
5979 
5980 /*
5981  * Allocate an empty header for a dictionary.
5982  */
5983     dict_T *
5984 dict_alloc()
5985 {
5986     dict_T *d;
5987 
5988     d = (dict_T *)alloc(sizeof(dict_T));
5989     if (d != NULL)
5990     {
5991 	/* Add the list to the hashtable for garbage collection. */
5992 	if (first_dict != NULL)
5993 	    first_dict->dv_used_prev = d;
5994 	d->dv_used_next = first_dict;
5995 	d->dv_used_prev = NULL;
5996 
5997 	hash_init(&d->dv_hashtab);
5998 	d->dv_lock = 0;
5999 	d->dv_refcount = 0;
6000 	d->dv_copyID = 0;
6001     }
6002     return d;
6003 }
6004 
6005 /*
6006  * Unreference a Dictionary: decrement the reference count and free it when it
6007  * becomes zero.
6008  */
6009     static void
6010 dict_unref(d)
6011     dict_T *d;
6012 {
6013     if (d != NULL && d->dv_refcount != DEL_REFCOUNT && --d->dv_refcount <= 0)
6014 	dict_free(d);
6015 }
6016 
6017 /*
6018  * Free a Dictionary, including all items it contains.
6019  * Ignores the reference count.
6020  */
6021     static void
6022 dict_free(d)
6023     dict_T *d;
6024 {
6025     int		todo;
6026     hashitem_T	*hi;
6027     dictitem_T	*di;
6028 
6029     /* Avoid that recursive reference to the dict frees us again. */
6030     d->dv_refcount = DEL_REFCOUNT;
6031 
6032     /* Remove the dict from the list of dicts for garbage collection. */
6033     if (d->dv_used_prev == NULL)
6034 	first_dict = d->dv_used_next;
6035     else
6036 	d->dv_used_prev->dv_used_next = d->dv_used_next;
6037     if (d->dv_used_next != NULL)
6038 	d->dv_used_next->dv_used_prev = d->dv_used_prev;
6039 
6040     /* Lock the hashtab, we don't want it to resize while freeing items. */
6041     hash_lock(&d->dv_hashtab);
6042     todo = d->dv_hashtab.ht_used;
6043     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
6044     {
6045 	if (!HASHITEM_EMPTY(hi))
6046 	{
6047 	    /* Remove the item before deleting it, just in case there is
6048 	     * something recursive causing trouble. */
6049 	    di = HI2DI(hi);
6050 	    hash_remove(&d->dv_hashtab, hi);
6051 	    dictitem_free(di);
6052 	    --todo;
6053 	}
6054     }
6055     hash_clear(&d->dv_hashtab);
6056     vim_free(d);
6057 }
6058 
6059 /*
6060  * Allocate a Dictionary item.
6061  * The "key" is copied to the new item.
6062  * Note that the value of the item "di_tv" still needs to be initialized!
6063  * Returns NULL when out of memory.
6064  */
6065     static dictitem_T *
6066 dictitem_alloc(key)
6067     char_u	*key;
6068 {
6069     dictitem_T *di;
6070 
6071     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(key));
6072     if (di != NULL)
6073     {
6074 	STRCPY(di->di_key, key);
6075 	di->di_flags = 0;
6076     }
6077     return di;
6078 }
6079 
6080 /*
6081  * Make a copy of a Dictionary item.
6082  */
6083     static dictitem_T *
6084 dictitem_copy(org)
6085     dictitem_T *org;
6086 {
6087     dictitem_T *di;
6088 
6089     di = (dictitem_T *)alloc(sizeof(dictitem_T) + STRLEN(org->di_key));
6090     if (di != NULL)
6091     {
6092 	STRCPY(di->di_key, org->di_key);
6093 	di->di_flags = 0;
6094 	copy_tv(&org->di_tv, &di->di_tv);
6095     }
6096     return di;
6097 }
6098 
6099 /*
6100  * Remove item "item" from Dictionary "dict" and free it.
6101  */
6102     static void
6103 dictitem_remove(dict, item)
6104     dict_T	*dict;
6105     dictitem_T	*item;
6106 {
6107     hashitem_T	*hi;
6108 
6109     hi = hash_find(&dict->dv_hashtab, item->di_key);
6110     if (HASHITEM_EMPTY(hi))
6111 	EMSG2(_(e_intern2), "dictitem_remove()");
6112     else
6113 	hash_remove(&dict->dv_hashtab, hi);
6114     dictitem_free(item);
6115 }
6116 
6117 /*
6118  * Free a dict item.  Also clears the value.
6119  */
6120     static void
6121 dictitem_free(item)
6122     dictitem_T *item;
6123 {
6124     clear_tv(&item->di_tv);
6125     vim_free(item);
6126 }
6127 
6128 /*
6129  * Make a copy of dict "d".  Shallow if "deep" is FALSE.
6130  * The refcount of the new dict is set to 1.
6131  * See item_copy() for "copyID".
6132  * Returns NULL when out of memory.
6133  */
6134     static dict_T *
6135 dict_copy(orig, deep, copyID)
6136     dict_T	*orig;
6137     int		deep;
6138     int		copyID;
6139 {
6140     dict_T	*copy;
6141     dictitem_T	*di;
6142     int		todo;
6143     hashitem_T	*hi;
6144 
6145     if (orig == NULL)
6146 	return NULL;
6147 
6148     copy = dict_alloc();
6149     if (copy != NULL)
6150     {
6151 	if (copyID != 0)
6152 	{
6153 	    orig->dv_copyID = copyID;
6154 	    orig->dv_copydict = copy;
6155 	}
6156 	todo = orig->dv_hashtab.ht_used;
6157 	for (hi = orig->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6158 	{
6159 	    if (!HASHITEM_EMPTY(hi))
6160 	    {
6161 		--todo;
6162 
6163 		di = dictitem_alloc(hi->hi_key);
6164 		if (di == NULL)
6165 		    break;
6166 		if (deep)
6167 		{
6168 		    if (item_copy(&HI2DI(hi)->di_tv, &di->di_tv, deep,
6169 							      copyID) == FAIL)
6170 		    {
6171 			vim_free(di);
6172 			break;
6173 		    }
6174 		}
6175 		else
6176 		    copy_tv(&HI2DI(hi)->di_tv, &di->di_tv);
6177 		if (dict_add(copy, di) == FAIL)
6178 		{
6179 		    dictitem_free(di);
6180 		    break;
6181 		}
6182 	    }
6183 	}
6184 
6185 	++copy->dv_refcount;
6186 	if (todo > 0)
6187 	{
6188 	    dict_unref(copy);
6189 	    copy = NULL;
6190 	}
6191     }
6192 
6193     return copy;
6194 }
6195 
6196 /*
6197  * Add item "item" to Dictionary "d".
6198  * Returns FAIL when out of memory and when key already existed.
6199  */
6200     static int
6201 dict_add(d, item)
6202     dict_T	*d;
6203     dictitem_T	*item;
6204 {
6205     return hash_add(&d->dv_hashtab, item->di_key);
6206 }
6207 
6208 /*
6209  * Add a number or string entry to dictionary "d".
6210  * When "str" is NULL use number "nr", otherwise use "str".
6211  * Returns FAIL when out of memory and when key already exists.
6212  */
6213     int
6214 dict_add_nr_str(d, key, nr, str)
6215     dict_T	*d;
6216     char	*key;
6217     long	nr;
6218     char_u	*str;
6219 {
6220     dictitem_T	*item;
6221 
6222     item = dictitem_alloc((char_u *)key);
6223     if (item == NULL)
6224 	return FAIL;
6225     item->di_tv.v_lock = 0;
6226     if (str == NULL)
6227     {
6228 	item->di_tv.v_type = VAR_NUMBER;
6229 	item->di_tv.vval.v_number = nr;
6230     }
6231     else
6232     {
6233 	item->di_tv.v_type = VAR_STRING;
6234 	item->di_tv.vval.v_string = vim_strsave(str);
6235     }
6236     if (dict_add(d, item) == FAIL)
6237     {
6238 	dictitem_free(item);
6239 	return FAIL;
6240     }
6241     return OK;
6242 }
6243 
6244 /*
6245  * Get the number of items in a Dictionary.
6246  */
6247     static long
6248 dict_len(d)
6249     dict_T	*d;
6250 {
6251     if (d == NULL)
6252 	return 0L;
6253     return d->dv_hashtab.ht_used;
6254 }
6255 
6256 /*
6257  * Find item "key[len]" in Dictionary "d".
6258  * If "len" is negative use strlen(key).
6259  * Returns NULL when not found.
6260  */
6261     static dictitem_T *
6262 dict_find(d, key, len)
6263     dict_T	*d;
6264     char_u	*key;
6265     int		len;
6266 {
6267 #define AKEYLEN 200
6268     char_u	buf[AKEYLEN];
6269     char_u	*akey;
6270     char_u	*tofree = NULL;
6271     hashitem_T	*hi;
6272 
6273     if (len < 0)
6274 	akey = key;
6275     else if (len >= AKEYLEN)
6276     {
6277 	tofree = akey = vim_strnsave(key, len);
6278 	if (akey == NULL)
6279 	    return NULL;
6280     }
6281     else
6282     {
6283 	/* Avoid a malloc/free by using buf[]. */
6284 	vim_strncpy(buf, key, len);
6285 	akey = buf;
6286     }
6287 
6288     hi = hash_find(&d->dv_hashtab, akey);
6289     vim_free(tofree);
6290     if (HASHITEM_EMPTY(hi))
6291 	return NULL;
6292     return HI2DI(hi);
6293 }
6294 
6295 /*
6296  * Get a string item from a dictionary in allocated memory.
6297  * Returns NULL if the entry doesn't exist or out of memory.
6298  */
6299     char_u *
6300 get_dict_string(d, key)
6301     dict_T	*d;
6302     char_u	*key;
6303 {
6304     dictitem_T	*di;
6305 
6306     di = dict_find(d, key, -1);
6307     if (di == NULL)
6308 	return NULL;
6309     return vim_strsave(get_tv_string(&di->di_tv));
6310 }
6311 
6312 /*
6313  * Get a number item from a dictionary.
6314  * Returns 0 if the entry doesn't exist or out of memory.
6315  */
6316     long
6317 get_dict_number(d, key)
6318     dict_T	*d;
6319     char_u	*key;
6320 {
6321     dictitem_T	*di;
6322 
6323     di = dict_find(d, key, -1);
6324     if (di == NULL)
6325 	return 0;
6326     return get_tv_number(&di->di_tv);
6327 }
6328 
6329 /*
6330  * Return an allocated string with the string representation of a Dictionary.
6331  * May return NULL.
6332  */
6333     static char_u *
6334 dict2string(tv)
6335     typval_T	*tv;
6336 {
6337     garray_T	ga;
6338     int		first = TRUE;
6339     char_u	*tofree;
6340     char_u	numbuf[NUMBUFLEN];
6341     hashitem_T	*hi;
6342     char_u	*s;
6343     dict_T	*d;
6344     int		todo;
6345 
6346     if ((d = tv->vval.v_dict) == NULL)
6347 	return NULL;
6348     ga_init2(&ga, (int)sizeof(char), 80);
6349     ga_append(&ga, '{');
6350 
6351     todo = d->dv_hashtab.ht_used;
6352     for (hi = d->dv_hashtab.ht_array; todo > 0 && !got_int; ++hi)
6353     {
6354 	if (!HASHITEM_EMPTY(hi))
6355 	{
6356 	    --todo;
6357 
6358 	    if (first)
6359 		first = FALSE;
6360 	    else
6361 		ga_concat(&ga, (char_u *)", ");
6362 
6363 	    tofree = string_quote(hi->hi_key, FALSE);
6364 	    if (tofree != NULL)
6365 	    {
6366 		ga_concat(&ga, tofree);
6367 		vim_free(tofree);
6368 	    }
6369 	    ga_concat(&ga, (char_u *)": ");
6370 	    s = tv2string(&HI2DI(hi)->di_tv, &tofree, numbuf);
6371 	    if (s != NULL)
6372 		ga_concat(&ga, s);
6373 	    vim_free(tofree);
6374 	    if (s == NULL)
6375 		break;
6376 	}
6377     }
6378     if (todo > 0)
6379     {
6380 	vim_free(ga.ga_data);
6381 	return NULL;
6382     }
6383 
6384     ga_append(&ga, '}');
6385     ga_append(&ga, NUL);
6386     return (char_u *)ga.ga_data;
6387 }
6388 
6389 /*
6390  * Allocate a variable for a Dictionary and fill it from "*arg".
6391  * Return OK or FAIL.  Returns NOTDONE for {expr}.
6392  */
6393     static int
6394 get_dict_tv(arg, rettv, evaluate)
6395     char_u	**arg;
6396     typval_T	*rettv;
6397     int		evaluate;
6398 {
6399     dict_T	*d = NULL;
6400     typval_T	tvkey;
6401     typval_T	tv;
6402     char_u	*key;
6403     dictitem_T	*item;
6404     char_u	*start = skipwhite(*arg + 1);
6405     char_u	buf[NUMBUFLEN];
6406 
6407     /*
6408      * First check if it's not a curly-braces thing: {expr}.
6409      * Must do this without evaluating, otherwise a function may be called
6410      * twice.  Unfortunately this means we need to call eval1() twice for the
6411      * first item.
6412      * But {} is an empty Dictionary.
6413      */
6414     if (*start != '}')
6415     {
6416 	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
6417 	    return FAIL;
6418 	if (*start == '}')
6419 	    return NOTDONE;
6420     }
6421 
6422     if (evaluate)
6423     {
6424 	d = dict_alloc();
6425 	if (d == NULL)
6426 	    return FAIL;
6427     }
6428     tvkey.v_type = VAR_UNKNOWN;
6429     tv.v_type = VAR_UNKNOWN;
6430 
6431     *arg = skipwhite(*arg + 1);
6432     while (**arg != '}' && **arg != NUL)
6433     {
6434 	if (eval1(arg, &tvkey, evaluate) == FAIL)	/* recursive! */
6435 	    goto failret;
6436 	if (**arg != ':')
6437 	{
6438 	    EMSG2(_("E720: Missing colon in Dictionary: %s"), *arg);
6439 	    clear_tv(&tvkey);
6440 	    goto failret;
6441 	}
6442 	key = get_tv_string_buf_chk(&tvkey, buf);
6443 	if (key == NULL || *key == NUL)
6444 	{
6445 	    /* "key" is NULL when get_tv_string_buf_chk() gave an errmsg */
6446 	    if (key != NULL)
6447 		EMSG(_(e_emptykey));
6448 	    clear_tv(&tvkey);
6449 	    goto failret;
6450 	}
6451 
6452 	*arg = skipwhite(*arg + 1);
6453 	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
6454 	{
6455 	    clear_tv(&tvkey);
6456 	    goto failret;
6457 	}
6458 	if (evaluate)
6459 	{
6460 	    item = dict_find(d, key, -1);
6461 	    if (item != NULL)
6462 	    {
6463 		EMSG2(_("E721: Duplicate key in Dictionary: \"%s\""), key);
6464 		clear_tv(&tvkey);
6465 		clear_tv(&tv);
6466 		goto failret;
6467 	    }
6468 	    item = dictitem_alloc(key);
6469 	    clear_tv(&tvkey);
6470 	    if (item != NULL)
6471 	    {
6472 		item->di_tv = tv;
6473 		item->di_tv.v_lock = 0;
6474 		if (dict_add(d, item) == FAIL)
6475 		    dictitem_free(item);
6476 	    }
6477 	}
6478 
6479 	if (**arg == '}')
6480 	    break;
6481 	if (**arg != ',')
6482 	{
6483 	    EMSG2(_("E722: Missing comma in Dictionary: %s"), *arg);
6484 	    goto failret;
6485 	}
6486 	*arg = skipwhite(*arg + 1);
6487     }
6488 
6489     if (**arg != '}')
6490     {
6491 	EMSG2(_("E723: Missing end of Dictionary '}': %s"), *arg);
6492 failret:
6493 	if (evaluate)
6494 	    dict_free(d);
6495 	return FAIL;
6496     }
6497 
6498     *arg = skipwhite(*arg + 1);
6499     if (evaluate)
6500     {
6501 	rettv->v_type = VAR_DICT;
6502 	rettv->vval.v_dict = d;
6503 	++d->dv_refcount;
6504     }
6505 
6506     return OK;
6507 }
6508 
6509 /*
6510  * Return a string with the string representation of a variable.
6511  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6512  * "numbuf" is used for a number.
6513  * Does not put quotes around strings, as ":echo" displays values.
6514  * May return NULL;
6515  */
6516     static char_u *
6517 echo_string(tv, tofree, numbuf)
6518     typval_T	*tv;
6519     char_u	**tofree;
6520     char_u	*numbuf;
6521 {
6522     static int	recurse = 0;
6523     char_u	*r = NULL;
6524 
6525     if (recurse >= DICT_MAXNEST)
6526     {
6527 	EMSG(_("E724: variable nested too deep for displaying"));
6528 	*tofree = NULL;
6529 	return NULL;
6530     }
6531     ++recurse;
6532 
6533     switch (tv->v_type)
6534     {
6535 	case VAR_FUNC:
6536 	    *tofree = NULL;
6537 	    r = tv->vval.v_string;
6538 	    break;
6539 	case VAR_LIST:
6540 	    *tofree = list2string(tv);
6541 	    r = *tofree;
6542 	    break;
6543 	case VAR_DICT:
6544 	    *tofree = dict2string(tv);
6545 	    r = *tofree;
6546 	    break;
6547 	case VAR_STRING:
6548 	case VAR_NUMBER:
6549 	    *tofree = NULL;
6550 	    r = get_tv_string_buf(tv, numbuf);
6551 	    break;
6552 	default:
6553 	    EMSG2(_(e_intern2), "echo_string()");
6554 	    *tofree = NULL;
6555     }
6556 
6557     --recurse;
6558     return r;
6559 }
6560 
6561 /*
6562  * Return a string with the string representation of a variable.
6563  * If the memory is allocated "tofree" is set to it, otherwise NULL.
6564  * "numbuf" is used for a number.
6565  * Puts quotes around strings, so that they can be parsed back by eval().
6566  * May return NULL;
6567  */
6568     static char_u *
6569 tv2string(tv, tofree, numbuf)
6570     typval_T	*tv;
6571     char_u	**tofree;
6572     char_u	*numbuf;
6573 {
6574     switch (tv->v_type)
6575     {
6576 	case VAR_FUNC:
6577 	    *tofree = string_quote(tv->vval.v_string, TRUE);
6578 	    return *tofree;
6579 	case VAR_STRING:
6580 	    *tofree = string_quote(tv->vval.v_string, FALSE);
6581 	    return *tofree;
6582 	case VAR_NUMBER:
6583 	case VAR_LIST:
6584 	case VAR_DICT:
6585 	    break;
6586 	default:
6587 	    EMSG2(_(e_intern2), "tv2string()");
6588     }
6589     return echo_string(tv, tofree, numbuf);
6590 }
6591 
6592 /*
6593  * Return string "str" in ' quotes, doubling ' characters.
6594  * If "str" is NULL an empty string is assumed.
6595  * If "function" is TRUE make it function('string').
6596  */
6597     static char_u *
6598 string_quote(str, function)
6599     char_u	*str;
6600     int		function;
6601 {
6602     unsigned	len;
6603     char_u	*p, *r, *s;
6604 
6605     len = (function ? 13 : 3);
6606     if (str != NULL)
6607     {
6608 	len += STRLEN(str);
6609 	for (p = str; *p != NUL; mb_ptr_adv(p))
6610 	    if (*p == '\'')
6611 		++len;
6612     }
6613     s = r = alloc(len);
6614     if (r != NULL)
6615     {
6616 	if (function)
6617 	{
6618 	    STRCPY(r, "function('");
6619 	    r += 10;
6620 	}
6621 	else
6622 	    *r++ = '\'';
6623 	if (str != NULL)
6624 	    for (p = str; *p != NUL; )
6625 	    {
6626 		if (*p == '\'')
6627 		    *r++ = '\'';
6628 		MB_COPY_CHAR(p, r);
6629 	    }
6630 	*r++ = '\'';
6631 	if (function)
6632 	    *r++ = ')';
6633 	*r++ = NUL;
6634     }
6635     return s;
6636 }
6637 
6638 /*
6639  * Get the value of an environment variable.
6640  * "arg" is pointing to the '$'.  It is advanced to after the name.
6641  * If the environment variable was not set, silently assume it is empty.
6642  * Always return OK.
6643  */
6644     static int
6645 get_env_tv(arg, rettv, evaluate)
6646     char_u	**arg;
6647     typval_T	*rettv;
6648     int		evaluate;
6649 {
6650     char_u	*string = NULL;
6651     int		len;
6652     int		cc;
6653     char_u	*name;
6654     int		mustfree = FALSE;
6655 
6656     ++*arg;
6657     name = *arg;
6658     len = get_env_len(arg);
6659     if (evaluate)
6660     {
6661 	if (len != 0)
6662 	{
6663 	    cc = name[len];
6664 	    name[len] = NUL;
6665 	    /* first try vim_getenv(), fast for normal environment vars */
6666 	    string = vim_getenv(name, &mustfree);
6667 	    if (string != NULL && *string != NUL)
6668 	    {
6669 		if (!mustfree)
6670 		    string = vim_strsave(string);
6671 	    }
6672 	    else
6673 	    {
6674 		if (mustfree)
6675 		    vim_free(string);
6676 
6677 		/* next try expanding things like $VIM and ${HOME} */
6678 		string = expand_env_save(name - 1);
6679 		if (string != NULL && *string == '$')
6680 		{
6681 		    vim_free(string);
6682 		    string = NULL;
6683 		}
6684 	    }
6685 	    name[len] = cc;
6686 	}
6687 	rettv->v_type = VAR_STRING;
6688 	rettv->vval.v_string = string;
6689     }
6690 
6691     return OK;
6692 }
6693 
6694 /*
6695  * Array with names and number of arguments of all internal functions
6696  * MUST BE KEPT SORTED IN strcmp() ORDER FOR BINARY SEARCH!
6697  */
6698 static struct fst
6699 {
6700     char	*f_name;	/* function name */
6701     char	f_min_argc;	/* minimal number of arguments */
6702     char	f_max_argc;	/* maximal number of arguments */
6703     void	(*f_func) __ARGS((typval_T *args, typval_T *rvar));
6704 				/* implemenation of function */
6705 } functions[] =
6706 {
6707     {"add",		2, 2, f_add},
6708     {"append",		2, 2, f_append},
6709     {"argc",		0, 0, f_argc},
6710     {"argidx",		0, 0, f_argidx},
6711     {"argv",		1, 1, f_argv},
6712     {"browse",		4, 4, f_browse},
6713     {"browsedir",	2, 2, f_browsedir},
6714     {"bufexists",	1, 1, f_bufexists},
6715     {"buffer_exists",	1, 1, f_bufexists},	/* obsolete */
6716     {"buffer_name",	1, 1, f_bufname},	/* obsolete */
6717     {"buffer_number",	1, 1, f_bufnr},		/* obsolete */
6718     {"buflisted",	1, 1, f_buflisted},
6719     {"bufloaded",	1, 1, f_bufloaded},
6720     {"bufname",		1, 1, f_bufname},
6721     {"bufnr",		1, 1, f_bufnr},
6722     {"bufwinnr",	1, 1, f_bufwinnr},
6723     {"byte2line",	1, 1, f_byte2line},
6724     {"byteidx",		2, 2, f_byteidx},
6725     {"call",		2, 3, f_call},
6726     {"char2nr",		1, 1, f_char2nr},
6727     {"cindent",		1, 1, f_cindent},
6728     {"col",		1, 1, f_col},
6729 #if defined(FEAT_INS_EXPAND)
6730     {"complete_add",	1, 1, f_complete_add},
6731     {"complete_check",	0, 0, f_complete_check},
6732 #endif
6733     {"confirm",		1, 4, f_confirm},
6734     {"copy",		1, 1, f_copy},
6735     {"count",		2, 4, f_count},
6736     {"cscope_connection",0,3, f_cscope_connection},
6737     {"cursor",		2, 2, f_cursor},
6738     {"deepcopy",	1, 2, f_deepcopy},
6739     {"delete",		1, 1, f_delete},
6740     {"did_filetype",	0, 0, f_did_filetype},
6741     {"diff_filler",	1, 1, f_diff_filler},
6742     {"diff_hlID",	2, 2, f_diff_hlID},
6743     {"empty",		1, 1, f_empty},
6744     {"escape",		2, 2, f_escape},
6745     {"eval",		1, 1, f_eval},
6746     {"eventhandler",	0, 0, f_eventhandler},
6747     {"executable",	1, 1, f_executable},
6748     {"exists",		1, 1, f_exists},
6749     {"expand",		1, 2, f_expand},
6750     {"extend",		2, 3, f_extend},
6751     {"file_readable",	1, 1, f_filereadable},	/* obsolete */
6752     {"filereadable",	1, 1, f_filereadable},
6753     {"filewritable",	1, 1, f_filewritable},
6754     {"filter",		2, 2, f_filter},
6755     {"finddir",		1, 3, f_finddir},
6756     {"findfile",	1, 3, f_findfile},
6757     {"fnamemodify",	2, 2, f_fnamemodify},
6758     {"foldclosed",	1, 1, f_foldclosed},
6759     {"foldclosedend",	1, 1, f_foldclosedend},
6760     {"foldlevel",	1, 1, f_foldlevel},
6761     {"foldtext",	0, 0, f_foldtext},
6762     {"foldtextresult",	1, 1, f_foldtextresult},
6763     {"foreground",	0, 0, f_foreground},
6764     {"function",	1, 1, f_function},
6765     {"garbagecollect",	0, 0, f_garbagecollect},
6766     {"get",		2, 3, f_get},
6767     {"getbufline",	2, 3, f_getbufline},
6768     {"getbufvar",	2, 2, f_getbufvar},
6769     {"getchar",		0, 1, f_getchar},
6770     {"getcharmod",	0, 0, f_getcharmod},
6771     {"getcmdline",	0, 0, f_getcmdline},
6772     {"getcmdpos",	0, 0, f_getcmdpos},
6773     {"getcmdtype",	0, 0, f_getcmdtype},
6774     {"getcwd",		0, 0, f_getcwd},
6775     {"getfontname",	0, 1, f_getfontname},
6776     {"getfperm",	1, 1, f_getfperm},
6777     {"getfsize",	1, 1, f_getfsize},
6778     {"getftime",	1, 1, f_getftime},
6779     {"getftype",	1, 1, f_getftype},
6780     {"getline",		1, 2, f_getline},
6781     {"getqflist",	0, 0, f_getqflist},
6782     {"getreg",		0, 2, f_getreg},
6783     {"getregtype",	0, 1, f_getregtype},
6784     {"getwinposx",	0, 0, f_getwinposx},
6785     {"getwinposy",	0, 0, f_getwinposy},
6786     {"getwinvar",	2, 2, f_getwinvar},
6787     {"glob",		1, 1, f_glob},
6788     {"globpath",	2, 2, f_globpath},
6789     {"has",		1, 1, f_has},
6790     {"has_key",		2, 2, f_has_key},
6791     {"hasmapto",	1, 2, f_hasmapto},
6792     {"highlightID",	1, 1, f_hlID},		/* obsolete */
6793     {"highlight_exists",1, 1, f_hlexists},	/* obsolete */
6794     {"histadd",		2, 2, f_histadd},
6795     {"histdel",		1, 2, f_histdel},
6796     {"histget",		1, 2, f_histget},
6797     {"histnr",		1, 1, f_histnr},
6798     {"hlID",		1, 1, f_hlID},
6799     {"hlexists",	1, 1, f_hlexists},
6800     {"hostname",	0, 0, f_hostname},
6801     {"iconv",		3, 3, f_iconv},
6802     {"indent",		1, 1, f_indent},
6803     {"index",		2, 4, f_index},
6804     {"input",		1, 3, f_input},
6805     {"inputdialog",	1, 3, f_inputdialog},
6806     {"inputlist",	1, 1, f_inputlist},
6807     {"inputrestore",	0, 0, f_inputrestore},
6808     {"inputsave",	0, 0, f_inputsave},
6809     {"inputsecret",	1, 2, f_inputsecret},
6810     {"insert",		2, 3, f_insert},
6811     {"isdirectory",	1, 1, f_isdirectory},
6812     {"islocked",	1, 1, f_islocked},
6813     {"items",		1, 1, f_items},
6814     {"join",		1, 2, f_join},
6815     {"keys",		1, 1, f_keys},
6816     {"last_buffer_nr",	0, 0, f_last_buffer_nr},/* obsolete */
6817     {"len",		1, 1, f_len},
6818     {"libcall",		3, 3, f_libcall},
6819     {"libcallnr",	3, 3, f_libcallnr},
6820     {"line",		1, 1, f_line},
6821     {"line2byte",	1, 1, f_line2byte},
6822     {"lispindent",	1, 1, f_lispindent},
6823     {"localtime",	0, 0, f_localtime},
6824     {"map",		2, 2, f_map},
6825     {"maparg",		1, 2, f_maparg},
6826     {"mapcheck",	1, 2, f_mapcheck},
6827     {"match",		2, 4, f_match},
6828     {"matchend",	2, 4, f_matchend},
6829     {"matchlist",	2, 4, f_matchlist},
6830     {"matchstr",	2, 4, f_matchstr},
6831     {"max",		1, 1, f_max},
6832     {"min",		1, 1, f_min},
6833 #ifdef vim_mkdir
6834     {"mkdir",		1, 3, f_mkdir},
6835 #endif
6836     {"mode",		0, 0, f_mode},
6837     {"nextnonblank",	1, 1, f_nextnonblank},
6838     {"nr2char",		1, 1, f_nr2char},
6839     {"prevnonblank",	1, 1, f_prevnonblank},
6840     {"printf",		2, 19, f_printf},
6841     {"range",		1, 3, f_range},
6842     {"readfile",	1, 3, f_readfile},
6843     {"remote_expr",	2, 3, f_remote_expr},
6844     {"remote_foreground", 1, 1, f_remote_foreground},
6845     {"remote_peek",	1, 2, f_remote_peek},
6846     {"remote_read",	1, 1, f_remote_read},
6847     {"remote_send",	2, 3, f_remote_send},
6848     {"remove",		2, 3, f_remove},
6849     {"rename",		2, 2, f_rename},
6850     {"repeat",		2, 2, f_repeat},
6851     {"resolve",		1, 1, f_resolve},
6852     {"reverse",		1, 1, f_reverse},
6853     {"search",		1, 2, f_search},
6854     {"searchdecl",	1, 3, f_searchdecl},
6855     {"searchpair",	3, 5, f_searchpair},
6856     {"server2client",	2, 2, f_server2client},
6857     {"serverlist",	0, 0, f_serverlist},
6858     {"setbufvar",	3, 3, f_setbufvar},
6859     {"setcmdpos",	1, 1, f_setcmdpos},
6860     {"setline",		2, 2, f_setline},
6861     {"setqflist",	1, 2, f_setqflist},
6862     {"setreg",		2, 3, f_setreg},
6863     {"setwinvar",	3, 3, f_setwinvar},
6864     {"simplify",	1, 1, f_simplify},
6865     {"sort",		1, 2, f_sort},
6866     {"soundfold",	1, 1, f_soundfold},
6867     {"spellbadword",	0, 0, f_spellbadword},
6868     {"spellsuggest",	1, 2, f_spellsuggest},
6869     {"split",		1, 3, f_split},
6870 #ifdef HAVE_STRFTIME
6871     {"strftime",	1, 2, f_strftime},
6872 #endif
6873     {"stridx",		2, 3, f_stridx},
6874     {"string",		1, 1, f_string},
6875     {"strlen",		1, 1, f_strlen},
6876     {"strpart",		2, 3, f_strpart},
6877     {"strridx",		2, 3, f_strridx},
6878     {"strtrans",	1, 1, f_strtrans},
6879     {"submatch",	1, 1, f_submatch},
6880     {"substitute",	4, 4, f_substitute},
6881     {"synID",		3, 3, f_synID},
6882     {"synIDattr",	2, 3, f_synIDattr},
6883     {"synIDtrans",	1, 1, f_synIDtrans},
6884     {"system",		1, 2, f_system},
6885     {"tagfiles",	0, 0, f_tagfiles},
6886     {"taglist",		1, 1, f_taglist},
6887     {"tempname",	0, 0, f_tempname},
6888     {"test",		1, 1, f_test},
6889     {"tolower",		1, 1, f_tolower},
6890     {"toupper",		1, 1, f_toupper},
6891     {"tr",		3, 3, f_tr},
6892     {"type",		1, 1, f_type},
6893     {"values",		1, 1, f_values},
6894     {"virtcol",		1, 1, f_virtcol},
6895     {"visualmode",	0, 1, f_visualmode},
6896     {"winbufnr",	1, 1, f_winbufnr},
6897     {"wincol",		0, 0, f_wincol},
6898     {"winheight",	1, 1, f_winheight},
6899     {"winline",		0, 0, f_winline},
6900     {"winnr",		0, 1, f_winnr},
6901     {"winrestcmd",	0, 0, f_winrestcmd},
6902     {"winwidth",	1, 1, f_winwidth},
6903     {"writefile",	2, 3, f_writefile},
6904 };
6905 
6906 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
6907 
6908 /*
6909  * Function given to ExpandGeneric() to obtain the list of internal
6910  * or user defined function names.
6911  */
6912     char_u *
6913 get_function_name(xp, idx)
6914     expand_T	*xp;
6915     int		idx;
6916 {
6917     static int	intidx = -1;
6918     char_u	*name;
6919 
6920     if (idx == 0)
6921 	intidx = -1;
6922     if (intidx < 0)
6923     {
6924 	name = get_user_func_name(xp, idx);
6925 	if (name != NULL)
6926 	    return name;
6927     }
6928     if (++intidx < (int)(sizeof(functions) / sizeof(struct fst)))
6929     {
6930 	STRCPY(IObuff, functions[intidx].f_name);
6931 	STRCAT(IObuff, "(");
6932 	if (functions[intidx].f_max_argc == 0)
6933 	    STRCAT(IObuff, ")");
6934 	return IObuff;
6935     }
6936 
6937     return NULL;
6938 }
6939 
6940 /*
6941  * Function given to ExpandGeneric() to obtain the list of internal or
6942  * user defined variable or function names.
6943  */
6944 /*ARGSUSED*/
6945     char_u *
6946 get_expr_name(xp, idx)
6947     expand_T	*xp;
6948     int		idx;
6949 {
6950     static int	intidx = -1;
6951     char_u	*name;
6952 
6953     if (idx == 0)
6954 	intidx = -1;
6955     if (intidx < 0)
6956     {
6957 	name = get_function_name(xp, idx);
6958 	if (name != NULL)
6959 	    return name;
6960     }
6961     return get_user_var_name(xp, ++intidx);
6962 }
6963 
6964 #endif /* FEAT_CMDL_COMPL */
6965 
6966 /*
6967  * Find internal function in table above.
6968  * Return index, or -1 if not found
6969  */
6970     static int
6971 find_internal_func(name)
6972     char_u	*name;		/* name of the function */
6973 {
6974     int		first = 0;
6975     int		last = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
6976     int		cmp;
6977     int		x;
6978 
6979     /*
6980      * Find the function name in the table. Binary search.
6981      */
6982     while (first <= last)
6983     {
6984 	x = first + ((unsigned)(last - first) >> 1);
6985 	cmp = STRCMP(name, functions[x].f_name);
6986 	if (cmp < 0)
6987 	    last = x - 1;
6988 	else if (cmp > 0)
6989 	    first = x + 1;
6990 	else
6991 	    return x;
6992     }
6993     return -1;
6994 }
6995 
6996 /*
6997  * Check if "name" is a variable of type VAR_FUNC.  If so, return the function
6998  * name it contains, otherwise return "name".
6999  */
7000     static char_u *
7001 deref_func_name(name, lenp)
7002     char_u	*name;
7003     int		*lenp;
7004 {
7005     dictitem_T	*v;
7006     int		cc;
7007 
7008     cc = name[*lenp];
7009     name[*lenp] = NUL;
7010     v = find_var(name, NULL);
7011     name[*lenp] = cc;
7012     if (v != NULL && v->di_tv.v_type == VAR_FUNC)
7013     {
7014 	if (v->di_tv.vval.v_string == NULL)
7015 	{
7016 	    *lenp = 0;
7017 	    return (char_u *)"";	/* just in case */
7018 	}
7019 	*lenp = STRLEN(v->di_tv.vval.v_string);
7020 	return v->di_tv.vval.v_string;
7021     }
7022 
7023     return name;
7024 }
7025 
7026 /*
7027  * Allocate a variable for the result of a function.
7028  * Return OK or FAIL.
7029  */
7030     static int
7031 get_func_tv(name, len, rettv, arg, firstline, lastline, doesrange,
7032 							   evaluate, selfdict)
7033     char_u	*name;		/* name of the function */
7034     int		len;		/* length of "name" */
7035     typval_T	*rettv;
7036     char_u	**arg;		/* argument, pointing to the '(' */
7037     linenr_T	firstline;	/* first line of range */
7038     linenr_T	lastline;	/* last line of range */
7039     int		*doesrange;	/* return: function handled range */
7040     int		evaluate;
7041     dict_T	*selfdict;	/* Dictionary for "self" */
7042 {
7043     char_u	*argp;
7044     int		ret = OK;
7045     typval_T	argvars[MAX_FUNC_ARGS];	/* vars for arguments */
7046     int		argcount = 0;		/* number of arguments found */
7047 
7048     /*
7049      * Get the arguments.
7050      */
7051     argp = *arg;
7052     while (argcount < MAX_FUNC_ARGS)
7053     {
7054 	argp = skipwhite(argp + 1);	    /* skip the '(' or ',' */
7055 	if (*argp == ')' || *argp == ',' || *argp == NUL)
7056 	    break;
7057 	if (eval1(&argp, &argvars[argcount], evaluate) == FAIL)
7058 	{
7059 	    ret = FAIL;
7060 	    break;
7061 	}
7062 	++argcount;
7063 	if (*argp != ',')
7064 	    break;
7065     }
7066     if (*argp == ')')
7067 	++argp;
7068     else
7069 	ret = FAIL;
7070 
7071     if (ret == OK)
7072 	ret = call_func(name, len, rettv, argcount, argvars,
7073 			  firstline, lastline, doesrange, evaluate, selfdict);
7074     else if (!aborting())
7075     {
7076 	if (argcount == MAX_FUNC_ARGS)
7077 	    emsg_funcname("E740: Too many arguments for function %s", name);
7078 	else
7079 	    emsg_funcname("E116: Invalid arguments for function %s", name);
7080     }
7081 
7082     while (--argcount >= 0)
7083 	clear_tv(&argvars[argcount]);
7084 
7085     *arg = skipwhite(argp);
7086     return ret;
7087 }
7088 
7089 
7090 /*
7091  * Call a function with its resolved parameters
7092  * Return OK or FAIL.
7093  */
7094     static int
7095 call_func(name, len, rettv, argcount, argvars, firstline, lastline,
7096 						doesrange, evaluate, selfdict)
7097     char_u	*name;		/* name of the function */
7098     int		len;		/* length of "name" */
7099     typval_T	*rettv;		/* return value goes here */
7100     int		argcount;	/* number of "argvars" */
7101     typval_T	*argvars;	/* vars for arguments */
7102     linenr_T	firstline;	/* first line of range */
7103     linenr_T	lastline;	/* last line of range */
7104     int		*doesrange;	/* return: function handled range */
7105     int		evaluate;
7106     dict_T	*selfdict;	/* Dictionary for "self" */
7107 {
7108     int		ret = FAIL;
7109 #define ERROR_UNKNOWN	0
7110 #define ERROR_TOOMANY	1
7111 #define ERROR_TOOFEW	2
7112 #define ERROR_SCRIPT	3
7113 #define ERROR_DICT	4
7114 #define ERROR_NONE	5
7115 #define ERROR_OTHER	6
7116     int		error = ERROR_NONE;
7117     int		i;
7118     int		llen;
7119     ufunc_T	*fp;
7120     int		cc;
7121 #define FLEN_FIXED 40
7122     char_u	fname_buf[FLEN_FIXED + 1];
7123     char_u	*fname;
7124 
7125     /*
7126      * In a script change <SID>name() and s:name() to K_SNR 123_name().
7127      * Change <SNR>123_name() to K_SNR 123_name().
7128      * Use fname_buf[] when it fits, otherwise allocate memory (slow).
7129      */
7130     cc = name[len];
7131     name[len] = NUL;
7132     llen = eval_fname_script(name);
7133     if (llen > 0)
7134     {
7135 	fname_buf[0] = K_SPECIAL;
7136 	fname_buf[1] = KS_EXTRA;
7137 	fname_buf[2] = (int)KE_SNR;
7138 	i = 3;
7139 	if (eval_fname_sid(name))	/* "<SID>" or "s:" */
7140 	{
7141 	    if (current_SID <= 0)
7142 		error = ERROR_SCRIPT;
7143 	    else
7144 	    {
7145 		sprintf((char *)fname_buf + 3, "%ld_", (long)current_SID);
7146 		i = (int)STRLEN(fname_buf);
7147 	    }
7148 	}
7149 	if (i + STRLEN(name + llen) < FLEN_FIXED)
7150 	{
7151 	    STRCPY(fname_buf + i, name + llen);
7152 	    fname = fname_buf;
7153 	}
7154 	else
7155 	{
7156 	    fname = alloc((unsigned)(i + STRLEN(name + llen) + 1));
7157 	    if (fname == NULL)
7158 		error = ERROR_OTHER;
7159 	    else
7160 	    {
7161 		mch_memmove(fname, fname_buf, (size_t)i);
7162 		STRCPY(fname + i, name + llen);
7163 	    }
7164 	}
7165     }
7166     else
7167 	fname = name;
7168 
7169     *doesrange = FALSE;
7170 
7171 
7172     /* execute the function if no errors detected and executing */
7173     if (evaluate && error == ERROR_NONE)
7174     {
7175 	rettv->v_type = VAR_NUMBER;	/* default is number rettv */
7176 	error = ERROR_UNKNOWN;
7177 
7178 	if (!builtin_function(fname))
7179 	{
7180 	    /*
7181 	     * User defined function.
7182 	     */
7183 	    fp = find_func(fname);
7184 
7185 #ifdef FEAT_AUTOCMD
7186 	    /* Trigger FuncUndefined event, may load the function. */
7187 	    if (fp == NULL
7188 		    && apply_autocmds(EVENT_FUNCUNDEFINED,
7189 						     fname, fname, TRUE, NULL)
7190 		    && !aborting())
7191 	    {
7192 		/* executed an autocommand, search for the function again */
7193 		fp = find_func(fname);
7194 	    }
7195 #endif
7196 	    /* Try loading a package. */
7197 	    if (fp == NULL && script_autoload(fname, TRUE) && !aborting())
7198 	    {
7199 		/* loaded a package, search for the function again */
7200 		fp = find_func(fname);
7201 	    }
7202 
7203 	    if (fp != NULL)
7204 	    {
7205 		if (fp->uf_flags & FC_RANGE)
7206 		    *doesrange = TRUE;
7207 		if (argcount < fp->uf_args.ga_len)
7208 		    error = ERROR_TOOFEW;
7209 		else if (!fp->uf_varargs && argcount > fp->uf_args.ga_len)
7210 		    error = ERROR_TOOMANY;
7211 		else if ((fp->uf_flags & FC_DICT) && selfdict == NULL)
7212 		    error = ERROR_DICT;
7213 		else
7214 		{
7215 		    /*
7216 		     * Call the user function.
7217 		     * Save and restore search patterns, script variables and
7218 		     * redo buffer.
7219 		     */
7220 		    save_search_patterns();
7221 		    saveRedobuff();
7222 		    ++fp->uf_calls;
7223 		    call_user_func(fp, argcount, argvars, rettv,
7224 					       firstline, lastline,
7225 				  (fp->uf_flags & FC_DICT) ? selfdict : NULL);
7226 		    if (--fp->uf_calls <= 0 && isdigit(*fp->uf_name)
7227 						      && fp->uf_refcount <= 0)
7228 			/* Function was unreferenced while being used, free it
7229 			 * now. */
7230 			func_free(fp);
7231 		    restoreRedobuff();
7232 		    restore_search_patterns();
7233 		    error = ERROR_NONE;
7234 		}
7235 	    }
7236 	}
7237 	else
7238 	{
7239 	    /*
7240 	     * Find the function name in the table, call its implementation.
7241 	     */
7242 	    i = find_internal_func(fname);
7243 	    if (i >= 0)
7244 	    {
7245 		if (argcount < functions[i].f_min_argc)
7246 		    error = ERROR_TOOFEW;
7247 		else if (argcount > functions[i].f_max_argc)
7248 		    error = ERROR_TOOMANY;
7249 		else
7250 		{
7251 		    argvars[argcount].v_type = VAR_UNKNOWN;
7252 		    functions[i].f_func(argvars, rettv);
7253 		    error = ERROR_NONE;
7254 		}
7255 	    }
7256 	}
7257 	/*
7258 	 * The function call (or "FuncUndefined" autocommand sequence) might
7259 	 * have been aborted by an error, an interrupt, or an explicitly thrown
7260 	 * exception that has not been caught so far.  This situation can be
7261 	 * tested for by calling aborting().  For an error in an internal
7262 	 * function or for the "E132" error in call_user_func(), however, the
7263 	 * throw point at which the "force_abort" flag (temporarily reset by
7264 	 * emsg()) is normally updated has not been reached yet. We need to
7265 	 * update that flag first to make aborting() reliable.
7266 	 */
7267 	update_force_abort();
7268     }
7269     if (error == ERROR_NONE)
7270 	ret = OK;
7271 
7272     /*
7273      * Report an error unless the argument evaluation or function call has been
7274      * cancelled due to an aborting error, an interrupt, or an exception.
7275      */
7276     if (!aborting())
7277     {
7278 	switch (error)
7279 	{
7280 	    case ERROR_UNKNOWN:
7281 		    emsg_funcname("E117: Unknown function: %s", name);
7282 		    break;
7283 	    case ERROR_TOOMANY:
7284 		    emsg_funcname(e_toomanyarg, name);
7285 		    break;
7286 	    case ERROR_TOOFEW:
7287 		    emsg_funcname("E119: Not enough arguments for function: %s",
7288 									name);
7289 		    break;
7290 	    case ERROR_SCRIPT:
7291 		    emsg_funcname("E120: Using <SID> not in a script context: %s",
7292 									name);
7293 		    break;
7294 	    case ERROR_DICT:
7295 		    emsg_funcname("E725: Calling dict function without Dictionary: %s",
7296 									name);
7297 		    break;
7298 	}
7299     }
7300 
7301     name[len] = cc;
7302     if (fname != name && fname != fname_buf)
7303 	vim_free(fname);
7304 
7305     return ret;
7306 }
7307 
7308 /*
7309  * Give an error message with a function name.  Handle <SNR> things.
7310  */
7311     static void
7312 emsg_funcname(msg, name)
7313     char	*msg;
7314     char_u	*name;
7315 {
7316     char_u	*p;
7317 
7318     if (*name == K_SPECIAL)
7319 	p = concat_str((char_u *)"<SNR>", name + 3);
7320     else
7321 	p = name;
7322     EMSG2(_(msg), p);
7323     if (p != name)
7324 	vim_free(p);
7325 }
7326 
7327 /*********************************************
7328  * Implementation of the built-in functions
7329  */
7330 
7331 /*
7332  * "add(list, item)" function
7333  */
7334     static void
7335 f_add(argvars, rettv)
7336     typval_T	*argvars;
7337     typval_T	*rettv;
7338 {
7339     list_T	*l;
7340 
7341     rettv->vval.v_number = 1; /* Default: Failed */
7342     if (argvars[0].v_type == VAR_LIST)
7343     {
7344 	if ((l = argvars[0].vval.v_list) != NULL
7345 		&& !tv_check_lock(l->lv_lock, (char_u *)"add()")
7346 		&& list_append_tv(l, &argvars[1]) == OK)
7347 	    copy_tv(&argvars[0], rettv);
7348     }
7349     else
7350 	EMSG(_(e_listreq));
7351 }
7352 
7353 /*
7354  * "append(lnum, string/list)" function
7355  */
7356     static void
7357 f_append(argvars, rettv)
7358     typval_T	*argvars;
7359     typval_T	*rettv;
7360 {
7361     long	lnum;
7362     char_u	*line;
7363     list_T	*l = NULL;
7364     listitem_T	*li = NULL;
7365     typval_T	*tv;
7366     long	added = 0;
7367 
7368     lnum = get_tv_lnum(argvars);
7369     if (lnum >= 0
7370 	    && lnum <= curbuf->b_ml.ml_line_count
7371 	    && u_save(lnum, lnum + 1) == OK)
7372     {
7373 	if (argvars[1].v_type == VAR_LIST)
7374 	{
7375 	    l = argvars[1].vval.v_list;
7376 	    if (l == NULL)
7377 		return;
7378 	    li = l->lv_first;
7379 	}
7380 	rettv->vval.v_number = 0;	/* Default: Success */
7381 	for (;;)
7382 	{
7383 	    if (l == NULL)
7384 		tv = &argvars[1];	/* append a string */
7385 	    else if (li == NULL)
7386 		break;			/* end of list */
7387 	    else
7388 		tv = &li->li_tv;	/* append item from list */
7389 	    line = get_tv_string_chk(tv);
7390 	    if (line == NULL)		/* type error */
7391 	    {
7392 		rettv->vval.v_number = 1;	/* Failed */
7393 		break;
7394 	    }
7395 	    ml_append(lnum + added, line, (colnr_T)0, FALSE);
7396 	    ++added;
7397 	    if (l == NULL)
7398 		break;
7399 	    li = li->li_next;
7400 	}
7401 
7402 	appended_lines_mark(lnum, added);
7403 	if (curwin->w_cursor.lnum > lnum)
7404 	    curwin->w_cursor.lnum += added;
7405     }
7406     else
7407 	rettv->vval.v_number = 1;	/* Failed */
7408 }
7409 
7410 /*
7411  * "argc()" function
7412  */
7413 /* ARGSUSED */
7414     static void
7415 f_argc(argvars, rettv)
7416     typval_T	*argvars;
7417     typval_T	*rettv;
7418 {
7419     rettv->vval.v_number = ARGCOUNT;
7420 }
7421 
7422 /*
7423  * "argidx()" function
7424  */
7425 /* ARGSUSED */
7426     static void
7427 f_argidx(argvars, rettv)
7428     typval_T	*argvars;
7429     typval_T	*rettv;
7430 {
7431     rettv->vval.v_number = curwin->w_arg_idx;
7432 }
7433 
7434 /*
7435  * "argv(nr)" function
7436  */
7437     static void
7438 f_argv(argvars, rettv)
7439     typval_T	*argvars;
7440     typval_T	*rettv;
7441 {
7442     int		idx;
7443 
7444     idx = get_tv_number_chk(&argvars[0], NULL);
7445     if (idx >= 0 && idx < ARGCOUNT)
7446 	rettv->vval.v_string = vim_strsave(alist_name(&ARGLIST[idx]));
7447     else
7448 	rettv->vval.v_string = NULL;
7449     rettv->v_type = VAR_STRING;
7450 }
7451 
7452 /*
7453  * "browse(save, title, initdir, default)" function
7454  */
7455 /* ARGSUSED */
7456     static void
7457 f_browse(argvars, rettv)
7458     typval_T	*argvars;
7459     typval_T	*rettv;
7460 {
7461 #ifdef FEAT_BROWSE
7462     int		save;
7463     char_u	*title;
7464     char_u	*initdir;
7465     char_u	*defname;
7466     char_u	buf[NUMBUFLEN];
7467     char_u	buf2[NUMBUFLEN];
7468     int		error = FALSE;
7469 
7470     save = get_tv_number_chk(&argvars[0], &error);
7471     title = get_tv_string_chk(&argvars[1]);
7472     initdir = get_tv_string_buf_chk(&argvars[2], buf);
7473     defname = get_tv_string_buf_chk(&argvars[3], buf2);
7474 
7475     if (error || title == NULL || initdir == NULL || defname == NULL)
7476 	rettv->vval.v_string = NULL;
7477     else
7478 	rettv->vval.v_string =
7479 		 do_browse(save ? BROWSE_SAVE : 0,
7480 				 title, defname, NULL, initdir, NULL, curbuf);
7481 #else
7482     rettv->vval.v_string = NULL;
7483 #endif
7484     rettv->v_type = VAR_STRING;
7485 }
7486 
7487 /*
7488  * "browsedir(title, initdir)" function
7489  */
7490 /* ARGSUSED */
7491     static void
7492 f_browsedir(argvars, rettv)
7493     typval_T	*argvars;
7494     typval_T	*rettv;
7495 {
7496 #ifdef FEAT_BROWSE
7497     char_u	*title;
7498     char_u	*initdir;
7499     char_u	buf[NUMBUFLEN];
7500 
7501     title = get_tv_string_chk(&argvars[0]);
7502     initdir = get_tv_string_buf_chk(&argvars[1], buf);
7503 
7504     if (title == NULL || initdir == NULL)
7505 	rettv->vval.v_string = NULL;
7506     else
7507 	rettv->vval.v_string = do_browse(BROWSE_DIR,
7508 				    title, NULL, NULL, initdir, NULL, curbuf);
7509 #else
7510     rettv->vval.v_string = NULL;
7511 #endif
7512     rettv->v_type = VAR_STRING;
7513 }
7514 
7515 static buf_T *find_buffer __ARGS((typval_T *avar));
7516 
7517 /*
7518  * Find a buffer by number or exact name.
7519  */
7520     static buf_T *
7521 find_buffer(avar)
7522     typval_T	*avar;
7523 {
7524     buf_T	*buf = NULL;
7525 
7526     if (avar->v_type == VAR_NUMBER)
7527 	buf = buflist_findnr((int)avar->vval.v_number);
7528     else if (avar->v_type == VAR_STRING && avar->vval.v_string != NULL)
7529     {
7530 	buf = buflist_findname_exp(avar->vval.v_string);
7531 	if (buf == NULL)
7532 	{
7533 	    /* No full path name match, try a match with a URL or a "nofile"
7534 	     * buffer, these don't use the full path. */
7535 	    for (buf = firstbuf; buf != NULL; buf = buf->b_next)
7536 		if (buf->b_fname != NULL
7537 			&& (path_with_url(buf->b_fname)
7538 #ifdef FEAT_QUICKFIX
7539 			    || bt_nofile(buf)
7540 #endif
7541 			   )
7542 			&& STRCMP(buf->b_fname, avar->vval.v_string) == 0)
7543 		    break;
7544 	}
7545     }
7546     return buf;
7547 }
7548 
7549 /*
7550  * "bufexists(expr)" function
7551  */
7552     static void
7553 f_bufexists(argvars, rettv)
7554     typval_T	*argvars;
7555     typval_T	*rettv;
7556 {
7557     rettv->vval.v_number = (find_buffer(&argvars[0]) != NULL);
7558 }
7559 
7560 /*
7561  * "buflisted(expr)" function
7562  */
7563     static void
7564 f_buflisted(argvars, rettv)
7565     typval_T	*argvars;
7566     typval_T	*rettv;
7567 {
7568     buf_T	*buf;
7569 
7570     buf = find_buffer(&argvars[0]);
7571     rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
7572 }
7573 
7574 /*
7575  * "bufloaded(expr)" function
7576  */
7577     static void
7578 f_bufloaded(argvars, rettv)
7579     typval_T	*argvars;
7580     typval_T	*rettv;
7581 {
7582     buf_T	*buf;
7583 
7584     buf = find_buffer(&argvars[0]);
7585     rettv->vval.v_number = (buf != NULL && buf->b_ml.ml_mfp != NULL);
7586 }
7587 
7588 static buf_T *get_buf_tv __ARGS((typval_T *tv));
7589 
7590 /*
7591  * Get buffer by number or pattern.
7592  */
7593     static buf_T *
7594 get_buf_tv(tv)
7595     typval_T	*tv;
7596 {
7597     char_u	*name = tv->vval.v_string;
7598     int		save_magic;
7599     char_u	*save_cpo;
7600     buf_T	*buf;
7601 
7602     if (tv->v_type == VAR_NUMBER)
7603 	return buflist_findnr((int)tv->vval.v_number);
7604     if (tv->v_type != VAR_STRING)
7605 	return NULL;
7606     if (name == NULL || *name == NUL)
7607 	return curbuf;
7608     if (name[0] == '$' && name[1] == NUL)
7609 	return lastbuf;
7610 
7611     /* Ignore 'magic' and 'cpoptions' here to make scripts portable */
7612     save_magic = p_magic;
7613     p_magic = TRUE;
7614     save_cpo = p_cpo;
7615     p_cpo = (char_u *)"";
7616 
7617     buf = buflist_findnr(buflist_findpat(name, name + STRLEN(name),
7618 								TRUE, FALSE));
7619 
7620     p_magic = save_magic;
7621     p_cpo = save_cpo;
7622 
7623     /* If not found, try expanding the name, like done for bufexists(). */
7624     if (buf == NULL)
7625 	buf = find_buffer(tv);
7626 
7627     return buf;
7628 }
7629 
7630 /*
7631  * "bufname(expr)" function
7632  */
7633     static void
7634 f_bufname(argvars, rettv)
7635     typval_T	*argvars;
7636     typval_T	*rettv;
7637 {
7638     buf_T	*buf;
7639 
7640     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7641     ++emsg_off;
7642     buf = get_buf_tv(&argvars[0]);
7643     rettv->v_type = VAR_STRING;
7644     if (buf != NULL && buf->b_fname != NULL)
7645 	rettv->vval.v_string = vim_strsave(buf->b_fname);
7646     else
7647 	rettv->vval.v_string = NULL;
7648     --emsg_off;
7649 }
7650 
7651 /*
7652  * "bufnr(expr)" function
7653  */
7654     static void
7655 f_bufnr(argvars, rettv)
7656     typval_T	*argvars;
7657     typval_T	*rettv;
7658 {
7659     buf_T	*buf;
7660 
7661     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7662     ++emsg_off;
7663     buf = get_buf_tv(&argvars[0]);
7664     if (buf != NULL)
7665 	rettv->vval.v_number = buf->b_fnum;
7666     else
7667 	rettv->vval.v_number = -1;
7668     --emsg_off;
7669 }
7670 
7671 /*
7672  * "bufwinnr(nr)" function
7673  */
7674     static void
7675 f_bufwinnr(argvars, rettv)
7676     typval_T	*argvars;
7677     typval_T	*rettv;
7678 {
7679 #ifdef FEAT_WINDOWS
7680     win_T	*wp;
7681     int		winnr = 0;
7682 #endif
7683     buf_T	*buf;
7684 
7685     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
7686     ++emsg_off;
7687     buf = get_buf_tv(&argvars[0]);
7688 #ifdef FEAT_WINDOWS
7689     for (wp = firstwin; wp; wp = wp->w_next)
7690     {
7691 	++winnr;
7692 	if (wp->w_buffer == buf)
7693 	    break;
7694     }
7695     rettv->vval.v_number = (wp != NULL ? winnr : -1);
7696 #else
7697     rettv->vval.v_number = (curwin->w_buffer == buf ? 1 : -1);
7698 #endif
7699     --emsg_off;
7700 }
7701 
7702 /*
7703  * "byte2line(byte)" function
7704  */
7705 /*ARGSUSED*/
7706     static void
7707 f_byte2line(argvars, rettv)
7708     typval_T	*argvars;
7709     typval_T	*rettv;
7710 {
7711 #ifndef FEAT_BYTEOFF
7712     rettv->vval.v_number = -1;
7713 #else
7714     long	boff = 0;
7715 
7716     boff = get_tv_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
7717     if (boff < 0)
7718 	rettv->vval.v_number = -1;
7719     else
7720 	rettv->vval.v_number = ml_find_line_or_offset(curbuf,
7721 							  (linenr_T)0, &boff);
7722 #endif
7723 }
7724 
7725 /*
7726  * "byteidx()" function
7727  */
7728 /*ARGSUSED*/
7729     static void
7730 f_byteidx(argvars, rettv)
7731     typval_T	*argvars;
7732     typval_T	*rettv;
7733 {
7734 #ifdef FEAT_MBYTE
7735     char_u	*t;
7736 #endif
7737     char_u	*str;
7738     long	idx;
7739 
7740     str = get_tv_string_chk(&argvars[0]);
7741     idx = get_tv_number_chk(&argvars[1], NULL);
7742     rettv->vval.v_number = -1;
7743     if (str == NULL || idx < 0)
7744 	return;
7745 
7746 #ifdef FEAT_MBYTE
7747     t = str;
7748     for ( ; idx > 0; idx--)
7749     {
7750 	if (*t == NUL)		/* EOL reached */
7751 	    return;
7752 	t += (*mb_ptr2len)(t);
7753     }
7754     rettv->vval.v_number = t - str;
7755 #else
7756     if (idx <= STRLEN(str))
7757 	rettv->vval.v_number = idx;
7758 #endif
7759 }
7760 
7761 /*
7762  * "call(func, arglist)" function
7763  */
7764     static void
7765 f_call(argvars, rettv)
7766     typval_T	*argvars;
7767     typval_T	*rettv;
7768 {
7769     char_u	*func;
7770     typval_T	argv[MAX_FUNC_ARGS];
7771     int		argc = 0;
7772     listitem_T	*item;
7773     int		dummy;
7774     dict_T	*selfdict = NULL;
7775 
7776     rettv->vval.v_number = 0;
7777     if (argvars[1].v_type != VAR_LIST)
7778     {
7779 	EMSG(_(e_listreq));
7780 	return;
7781     }
7782     if (argvars[1].vval.v_list == NULL)
7783 	return;
7784 
7785     if (argvars[0].v_type == VAR_FUNC)
7786 	func = argvars[0].vval.v_string;
7787     else
7788 	func = get_tv_string(&argvars[0]);
7789     if (*func == NUL)
7790 	return;		/* type error or empty name */
7791 
7792     if (argvars[2].v_type != VAR_UNKNOWN)
7793     {
7794 	if (argvars[2].v_type != VAR_DICT)
7795 	{
7796 	    EMSG(_(e_dictreq));
7797 	    return;
7798 	}
7799 	selfdict = argvars[2].vval.v_dict;
7800     }
7801 
7802     for (item = argvars[1].vval.v_list->lv_first; item != NULL;
7803 							 item = item->li_next)
7804     {
7805 	if (argc == MAX_FUNC_ARGS)
7806 	{
7807 	    EMSG(_("E699: Too many arguments"));
7808 	    break;
7809 	}
7810 	/* Make a copy of each argument.  This is needed to be able to set
7811 	 * v_lock to VAR_FIXED in the copy without changing the original list.
7812 	 */
7813 	copy_tv(&item->li_tv, &argv[argc++]);
7814     }
7815 
7816     if (item == NULL)
7817 	(void)call_func(func, STRLEN(func), rettv, argc, argv,
7818 				 curwin->w_cursor.lnum, curwin->w_cursor.lnum,
7819 						      &dummy, TRUE, selfdict);
7820 
7821     /* Free the arguments. */
7822     while (argc > 0)
7823 	clear_tv(&argv[--argc]);
7824 }
7825 
7826 /*
7827  * "char2nr(string)" function
7828  */
7829     static void
7830 f_char2nr(argvars, rettv)
7831     typval_T	*argvars;
7832     typval_T	*rettv;
7833 {
7834 #ifdef FEAT_MBYTE
7835     if (has_mbyte)
7836 	rettv->vval.v_number = (*mb_ptr2char)(get_tv_string(&argvars[0]));
7837     else
7838 #endif
7839     rettv->vval.v_number = get_tv_string(&argvars[0])[0];
7840 }
7841 
7842 /*
7843  * "cindent(lnum)" function
7844  */
7845     static void
7846 f_cindent(argvars, rettv)
7847     typval_T	*argvars;
7848     typval_T	*rettv;
7849 {
7850 #ifdef FEAT_CINDENT
7851     pos_T	pos;
7852     linenr_T	lnum;
7853 
7854     pos = curwin->w_cursor;
7855     lnum = get_tv_lnum(argvars);
7856     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
7857     {
7858 	curwin->w_cursor.lnum = lnum;
7859 	rettv->vval.v_number = get_c_indent();
7860 	curwin->w_cursor = pos;
7861     }
7862     else
7863 #endif
7864 	rettv->vval.v_number = -1;
7865 }
7866 
7867 /*
7868  * "col(string)" function
7869  */
7870     static void
7871 f_col(argvars, rettv)
7872     typval_T	*argvars;
7873     typval_T	*rettv;
7874 {
7875     colnr_T	col = 0;
7876     pos_T	*fp;
7877 
7878     fp = var2fpos(&argvars[0], FALSE);
7879     if (fp != NULL)
7880     {
7881 	if (fp->col == MAXCOL)
7882 	{
7883 	    /* '> can be MAXCOL, get the length of the line then */
7884 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
7885 		col = STRLEN(ml_get(fp->lnum)) + 1;
7886 	    else
7887 		col = MAXCOL;
7888 	}
7889 	else
7890 	{
7891 	    col = fp->col + 1;
7892 #ifdef FEAT_VIRTUALEDIT
7893 	    /* col(".") when the cursor is on the NUL at the end of the line
7894 	     * because of "coladd" can be seen as an extra column. */
7895 	    if (virtual_active() && fp == &curwin->w_cursor)
7896 	    {
7897 		char_u	*p = ml_get_cursor();
7898 
7899 		if (curwin->w_cursor.coladd >= (colnr_T)chartabsize(p,
7900 				 curwin->w_virtcol - curwin->w_cursor.coladd))
7901 		{
7902 # ifdef FEAT_MBYTE
7903 		    int		l;
7904 
7905 		    if (*p != NUL && p[(l = (*mb_ptr2len)(p))] == NUL)
7906 			col += l;
7907 # else
7908 		    if (*p != NUL && p[1] == NUL)
7909 			++col;
7910 # endif
7911 		}
7912 	    }
7913 #endif
7914 	}
7915     }
7916     rettv->vval.v_number = col;
7917 }
7918 
7919 #if defined(FEAT_INS_EXPAND)
7920 /*
7921  * "complete_add()" function
7922  */
7923 /*ARGSUSED*/
7924     static void
7925 f_complete_add(argvars, rettv)
7926     typval_T	*argvars;
7927     typval_T	*rettv;
7928 {
7929     char_u	*s;
7930 
7931     s = get_tv_string_chk(&argvars[0]);
7932     if (s != NULL)
7933 	rettv->vval.v_number = ins_compl_add(s, -1, NULL, FORWARD, 0);
7934 }
7935 
7936 /*
7937  * "complete_check()" function
7938  */
7939 /*ARGSUSED*/
7940     static void
7941 f_complete_check(argvars, rettv)
7942     typval_T	*argvars;
7943     typval_T	*rettv;
7944 {
7945     int		saved = RedrawingDisabled;
7946 
7947     RedrawingDisabled = 0;
7948     ins_compl_check_keys(0);
7949     rettv->vval.v_number = compl_interrupted;
7950     RedrawingDisabled = saved;
7951 }
7952 #endif
7953 
7954 /*
7955  * "confirm(message, buttons[, default [, type]])" function
7956  */
7957 /*ARGSUSED*/
7958     static void
7959 f_confirm(argvars, rettv)
7960     typval_T	*argvars;
7961     typval_T	*rettv;
7962 {
7963 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
7964     char_u	*message;
7965     char_u	*buttons = NULL;
7966     char_u	buf[NUMBUFLEN];
7967     char_u	buf2[NUMBUFLEN];
7968     int		def = 1;
7969     int		type = VIM_GENERIC;
7970     char_u	*typestr;
7971     int		error = FALSE;
7972 
7973     message = get_tv_string_chk(&argvars[0]);
7974     if (message == NULL)
7975 	error = TRUE;
7976     if (argvars[1].v_type != VAR_UNKNOWN)
7977     {
7978 	buttons = get_tv_string_buf_chk(&argvars[1], buf);
7979 	if (buttons == NULL)
7980 	    error = TRUE;
7981 	if (argvars[2].v_type != VAR_UNKNOWN)
7982 	{
7983 	    def = get_tv_number_chk(&argvars[2], &error);
7984 	    if (argvars[3].v_type != VAR_UNKNOWN)
7985 	    {
7986 		typestr = get_tv_string_buf_chk(&argvars[3], buf2);
7987 		if (typestr == NULL)
7988 		    error = TRUE;
7989 		else
7990 		{
7991 		    switch (TOUPPER_ASC(*typestr))
7992 		    {
7993 			case 'E': type = VIM_ERROR; break;
7994 			case 'Q': type = VIM_QUESTION; break;
7995 			case 'I': type = VIM_INFO; break;
7996 			case 'W': type = VIM_WARNING; break;
7997 			case 'G': type = VIM_GENERIC; break;
7998 		    }
7999 		}
8000 	    }
8001 	}
8002     }
8003 
8004     if (buttons == NULL || *buttons == NUL)
8005 	buttons = (char_u *)_("&Ok");
8006 
8007     if (error)
8008 	rettv->vval.v_number = 0;
8009     else
8010 	rettv->vval.v_number = do_dialog(type, NULL, message, buttons,
8011 								   def, NULL);
8012 #else
8013     rettv->vval.v_number = 0;
8014 #endif
8015 }
8016 
8017 /*
8018  * "copy()" function
8019  */
8020     static void
8021 f_copy(argvars, rettv)
8022     typval_T	*argvars;
8023     typval_T	*rettv;
8024 {
8025     item_copy(&argvars[0], rettv, FALSE, 0);
8026 }
8027 
8028 /*
8029  * "count()" function
8030  */
8031     static void
8032 f_count(argvars, rettv)
8033     typval_T	*argvars;
8034     typval_T	*rettv;
8035 {
8036     long	n = 0;
8037     int		ic = FALSE;
8038 
8039     if (argvars[0].v_type == VAR_LIST)
8040     {
8041 	listitem_T	*li;
8042 	list_T		*l;
8043 	long		idx;
8044 
8045 	if ((l = argvars[0].vval.v_list) != NULL)
8046 	{
8047 	    li = l->lv_first;
8048 	    if (argvars[2].v_type != VAR_UNKNOWN)
8049 	    {
8050 		int error = FALSE;
8051 
8052 		ic = get_tv_number_chk(&argvars[2], &error);
8053 		if (argvars[3].v_type != VAR_UNKNOWN)
8054 		{
8055 		    idx = get_tv_number_chk(&argvars[3], &error);
8056 		    if (!error)
8057 		    {
8058 			li = list_find(l, idx);
8059 			if (li == NULL)
8060 			    EMSGN(_(e_listidx), idx);
8061 		    }
8062 		}
8063 		if (error)
8064 		    li = NULL;
8065 	    }
8066 
8067 	    for ( ; li != NULL; li = li->li_next)
8068 		if (tv_equal(&li->li_tv, &argvars[1], ic))
8069 		    ++n;
8070 	}
8071     }
8072     else if (argvars[0].v_type == VAR_DICT)
8073     {
8074 	int		todo;
8075 	dict_T		*d;
8076 	hashitem_T	*hi;
8077 
8078 	if ((d = argvars[0].vval.v_dict) != NULL)
8079 	{
8080 	    int error = FALSE;
8081 
8082 	    if (argvars[2].v_type != VAR_UNKNOWN)
8083 	    {
8084 		ic = get_tv_number_chk(&argvars[2], &error);
8085 		if (argvars[3].v_type != VAR_UNKNOWN)
8086 		    EMSG(_(e_invarg));
8087 	    }
8088 
8089 	    todo = error ? 0 : d->dv_hashtab.ht_used;
8090 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
8091 	    {
8092 		if (!HASHITEM_EMPTY(hi))
8093 		{
8094 		    --todo;
8095 		    if (tv_equal(&HI2DI(hi)->di_tv, &argvars[1], ic))
8096 			++n;
8097 		}
8098 	    }
8099 	}
8100     }
8101     else
8102 	EMSG2(_(e_listdictarg), "count()");
8103     rettv->vval.v_number = n;
8104 }
8105 
8106 /*
8107  * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
8108  *
8109  * Checks the existence of a cscope connection.
8110  */
8111 /*ARGSUSED*/
8112     static void
8113 f_cscope_connection(argvars, rettv)
8114     typval_T	*argvars;
8115     typval_T	*rettv;
8116 {
8117 #ifdef FEAT_CSCOPE
8118     int		num = 0;
8119     char_u	*dbpath = NULL;
8120     char_u	*prepend = NULL;
8121     char_u	buf[NUMBUFLEN];
8122 
8123     if (argvars[0].v_type != VAR_UNKNOWN
8124 	    && argvars[1].v_type != VAR_UNKNOWN)
8125     {
8126 	num = (int)get_tv_number(&argvars[0]);
8127 	dbpath = get_tv_string(&argvars[1]);
8128 	if (argvars[2].v_type != VAR_UNKNOWN)
8129 	    prepend = get_tv_string_buf(&argvars[2], buf);
8130     }
8131 
8132     rettv->vval.v_number = cs_connection(num, dbpath, prepend);
8133 #else
8134     rettv->vval.v_number = 0;
8135 #endif
8136 }
8137 
8138 /*
8139  * "cursor(lnum, col)" function
8140  *
8141  * Moves the cursor to the specified line and column
8142  */
8143 /*ARGSUSED*/
8144     static void
8145 f_cursor(argvars, rettv)
8146     typval_T	*argvars;
8147     typval_T	*rettv;
8148 {
8149     long	line, col;
8150 
8151     line = get_tv_lnum(argvars);
8152     col = get_tv_number_chk(&argvars[1], NULL);
8153     if (line < 0 || col < 0)
8154 	return;		/* type error; errmsg already given */
8155     if (line > 0)
8156 	curwin->w_cursor.lnum = line;
8157     if (col > 0)
8158 	curwin->w_cursor.col = col - 1;
8159 #ifdef FEAT_VIRTUALEDIT
8160     curwin->w_cursor.coladd = 0;
8161 #endif
8162 
8163     /* Make sure the cursor is in a valid position. */
8164     check_cursor();
8165 #ifdef FEAT_MBYTE
8166     /* Correct cursor for multi-byte character. */
8167     if (has_mbyte)
8168 	mb_adjust_cursor();
8169 #endif
8170 
8171     curwin->w_set_curswant = TRUE;
8172 }
8173 
8174 /*
8175  * "deepcopy()" function
8176  */
8177     static void
8178 f_deepcopy(argvars, rettv)
8179     typval_T	*argvars;
8180     typval_T	*rettv;
8181 {
8182     int		noref = 0;
8183 
8184     if (argvars[1].v_type != VAR_UNKNOWN)
8185 	noref = get_tv_number_chk(&argvars[1], NULL);
8186     if (noref < 0 || noref > 1)
8187 	EMSG(_(e_invarg));
8188     else
8189 	item_copy(&argvars[0], rettv, TRUE, noref == 0 ? ++current_copyID : 0);
8190 }
8191 
8192 /*
8193  * "delete()" function
8194  */
8195     static void
8196 f_delete(argvars, rettv)
8197     typval_T	*argvars;
8198     typval_T	*rettv;
8199 {
8200     if (check_restricted() || check_secure())
8201 	rettv->vval.v_number = -1;
8202     else
8203 	rettv->vval.v_number = mch_remove(get_tv_string(&argvars[0]));
8204 }
8205 
8206 /*
8207  * "did_filetype()" function
8208  */
8209 /*ARGSUSED*/
8210     static void
8211 f_did_filetype(argvars, rettv)
8212     typval_T	*argvars;
8213     typval_T	*rettv;
8214 {
8215 #ifdef FEAT_AUTOCMD
8216     rettv->vval.v_number = did_filetype;
8217 #else
8218     rettv->vval.v_number = 0;
8219 #endif
8220 }
8221 
8222 /*
8223  * "diff_filler()" function
8224  */
8225 /*ARGSUSED*/
8226     static void
8227 f_diff_filler(argvars, rettv)
8228     typval_T	*argvars;
8229     typval_T	*rettv;
8230 {
8231 #ifdef FEAT_DIFF
8232     rettv->vval.v_number = diff_check_fill(curwin, get_tv_lnum(argvars));
8233 #endif
8234 }
8235 
8236 /*
8237  * "diff_hlID()" function
8238  */
8239 /*ARGSUSED*/
8240     static void
8241 f_diff_hlID(argvars, rettv)
8242     typval_T	*argvars;
8243     typval_T	*rettv;
8244 {
8245 #ifdef FEAT_DIFF
8246     linenr_T		lnum = get_tv_lnum(argvars);
8247     static linenr_T	prev_lnum = 0;
8248     static int		changedtick = 0;
8249     static int		fnum = 0;
8250     static int		change_start = 0;
8251     static int		change_end = 0;
8252     static enum hlf_value hlID = 0;
8253     int			filler_lines;
8254     int			col;
8255 
8256     if (lnum < 0)	/* ignore type error in {lnum} arg */
8257 	lnum = 0;
8258     if (lnum != prev_lnum
8259 	    || changedtick != curbuf->b_changedtick
8260 	    || fnum != curbuf->b_fnum)
8261     {
8262 	/* New line, buffer, change: need to get the values. */
8263 	filler_lines = diff_check(curwin, lnum);
8264 	if (filler_lines < 0)
8265 	{
8266 	    if (filler_lines == -1)
8267 	    {
8268 		change_start = MAXCOL;
8269 		change_end = -1;
8270 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
8271 		    hlID = HLF_ADD;	/* added line */
8272 		else
8273 		    hlID = HLF_CHD;	/* changed line */
8274 	    }
8275 	    else
8276 		hlID = HLF_ADD;	/* added line */
8277 	}
8278 	else
8279 	    hlID = (enum hlf_value)0;
8280 	prev_lnum = lnum;
8281 	changedtick = curbuf->b_changedtick;
8282 	fnum = curbuf->b_fnum;
8283     }
8284 
8285     if (hlID == HLF_CHD || hlID == HLF_TXD)
8286     {
8287 	col = get_tv_number(&argvars[1]) - 1; /* ignore type error in {col} */
8288 	if (col >= change_start && col <= change_end)
8289 	    hlID = HLF_TXD;			/* changed text */
8290 	else
8291 	    hlID = HLF_CHD;			/* changed line */
8292     }
8293     rettv->vval.v_number = hlID == (enum hlf_value)0 ? 0 : (int)hlID;
8294 #endif
8295 }
8296 
8297 /*
8298  * "empty({expr})" function
8299  */
8300     static void
8301 f_empty(argvars, rettv)
8302     typval_T	*argvars;
8303     typval_T	*rettv;
8304 {
8305     int		n;
8306 
8307     switch (argvars[0].v_type)
8308     {
8309 	case VAR_STRING:
8310 	case VAR_FUNC:
8311 	    n = argvars[0].vval.v_string == NULL
8312 					  || *argvars[0].vval.v_string == NUL;
8313 	    break;
8314 	case VAR_NUMBER:
8315 	    n = argvars[0].vval.v_number == 0;
8316 	    break;
8317 	case VAR_LIST:
8318 	    n = argvars[0].vval.v_list == NULL
8319 				  || argvars[0].vval.v_list->lv_first == NULL;
8320 	    break;
8321 	case VAR_DICT:
8322 	    n = argvars[0].vval.v_dict == NULL
8323 			|| argvars[0].vval.v_dict->dv_hashtab.ht_used == 0;
8324 	    break;
8325 	default:
8326 	    EMSG2(_(e_intern2), "f_empty()");
8327 	    n = 0;
8328     }
8329 
8330     rettv->vval.v_number = n;
8331 }
8332 
8333 /*
8334  * "escape({string}, {chars})" function
8335  */
8336     static void
8337 f_escape(argvars, rettv)
8338     typval_T	*argvars;
8339     typval_T	*rettv;
8340 {
8341     char_u	buf[NUMBUFLEN];
8342 
8343     rettv->vval.v_string = vim_strsave_escaped(get_tv_string(&argvars[0]),
8344 					 get_tv_string_buf(&argvars[1], buf));
8345     rettv->v_type = VAR_STRING;
8346 }
8347 
8348 /*
8349  * "eval()" function
8350  */
8351 /*ARGSUSED*/
8352     static void
8353 f_eval(argvars, rettv)
8354     typval_T	*argvars;
8355     typval_T	*rettv;
8356 {
8357     char_u	*s;
8358 
8359     s = get_tv_string_chk(&argvars[0]);
8360     if (s != NULL)
8361 	s = skipwhite(s);
8362 
8363     if (s == NULL || eval1(&s, rettv, TRUE) == FAIL)
8364     {
8365 	rettv->v_type = VAR_NUMBER;
8366 	rettv->vval.v_number = 0;
8367     }
8368     else if (*s != NUL)
8369 	EMSG(_(e_trailing));
8370 }
8371 
8372 /*
8373  * "eventhandler()" function
8374  */
8375 /*ARGSUSED*/
8376     static void
8377 f_eventhandler(argvars, rettv)
8378     typval_T	*argvars;
8379     typval_T	*rettv;
8380 {
8381     rettv->vval.v_number = vgetc_busy;
8382 }
8383 
8384 /*
8385  * "executable()" function
8386  */
8387     static void
8388 f_executable(argvars, rettv)
8389     typval_T	*argvars;
8390     typval_T	*rettv;
8391 {
8392     rettv->vval.v_number = mch_can_exe(get_tv_string(&argvars[0]));
8393 }
8394 
8395 /*
8396  * "exists()" function
8397  */
8398     static void
8399 f_exists(argvars, rettv)
8400     typval_T	*argvars;
8401     typval_T	*rettv;
8402 {
8403     char_u	*p;
8404     char_u	*name;
8405     int		n = FALSE;
8406     int		len = 0;
8407 
8408     p = get_tv_string(&argvars[0]);
8409     if (*p == '$')			/* environment variable */
8410     {
8411 	/* first try "normal" environment variables (fast) */
8412 	if (mch_getenv(p + 1) != NULL)
8413 	    n = TRUE;
8414 	else
8415 	{
8416 	    /* try expanding things like $VIM and ${HOME} */
8417 	    p = expand_env_save(p);
8418 	    if (p != NULL && *p != '$')
8419 		n = TRUE;
8420 	    vim_free(p);
8421 	}
8422     }
8423     else if (*p == '&' || *p == '+')			/* option */
8424 	n = (get_option_tv(&p, NULL, TRUE) == OK);
8425     else if (*p == '*')			/* internal or user defined function */
8426     {
8427 	n = function_exists(p + 1);
8428     }
8429     else if (*p == ':')
8430     {
8431 	n = cmd_exists(p + 1);
8432     }
8433     else if (*p == '#')
8434     {
8435 #ifdef FEAT_AUTOCMD
8436 	name = p + 1;
8437 	p = vim_strchr(name, '#');
8438 	if (p != NULL)
8439 	    n = au_exists(name, p, p + 1);
8440 	else
8441 	    n = au_exists(name, name + STRLEN(name), NULL);
8442 #endif
8443     }
8444     else				/* internal variable */
8445     {
8446 	char_u	    *tofree;
8447 	typval_T    tv;
8448 
8449 	/* get_name_len() takes care of expanding curly braces */
8450 	name = p;
8451 	len = get_name_len(&p, &tofree, TRUE, FALSE);
8452 	if (len > 0)
8453 	{
8454 	    if (tofree != NULL)
8455 		name = tofree;
8456 	    n = (get_var_tv(name, len, &tv, FALSE) == OK);
8457 	    if (n)
8458 	    {
8459 		/* handle d.key, l[idx], f(expr) */
8460 		n = (handle_subscript(&p, &tv, TRUE, FALSE) == OK);
8461 		if (n)
8462 		    clear_tv(&tv);
8463 	    }
8464 	}
8465 
8466 	vim_free(tofree);
8467     }
8468 
8469     rettv->vval.v_number = n;
8470 }
8471 
8472 /*
8473  * "expand()" function
8474  */
8475     static void
8476 f_expand(argvars, rettv)
8477     typval_T	*argvars;
8478     typval_T	*rettv;
8479 {
8480     char_u	*s;
8481     int		len;
8482     char_u	*errormsg;
8483     int		flags = WILD_SILENT|WILD_USE_NL|WILD_LIST_NOTFOUND;
8484     expand_T	xpc;
8485     int		error = FALSE;
8486 
8487     rettv->v_type = VAR_STRING;
8488     s = get_tv_string(&argvars[0]);
8489     if (*s == '%' || *s == '#' || *s == '<')
8490     {
8491 	++emsg_off;
8492 	rettv->vval.v_string = eval_vars(s, &len, NULL, &errormsg, s);
8493 	--emsg_off;
8494     }
8495     else
8496     {
8497 	/* When the optional second argument is non-zero, don't remove matches
8498 	 * for 'suffixes' and 'wildignore' */
8499 	if (argvars[1].v_type != VAR_UNKNOWN
8500 				    && get_tv_number_chk(&argvars[1], &error))
8501 	    flags |= WILD_KEEP_ALL;
8502 	if (!error)
8503 	{
8504 	    ExpandInit(&xpc);
8505 	    xpc.xp_context = EXPAND_FILES;
8506 	    rettv->vval.v_string = ExpandOne(&xpc, s, NULL, flags, WILD_ALL);
8507 	    ExpandCleanup(&xpc);
8508 	}
8509 	else
8510 	    rettv->vval.v_string = NULL;
8511     }
8512 }
8513 
8514 /*
8515  * "extend(list, list [, idx])" function
8516  * "extend(dict, dict [, action])" function
8517  */
8518     static void
8519 f_extend(argvars, rettv)
8520     typval_T	*argvars;
8521     typval_T	*rettv;
8522 {
8523     rettv->vval.v_number = 0;
8524     if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
8525     {
8526 	list_T		*l1, *l2;
8527 	listitem_T	*item;
8528 	long		before;
8529 	int		error = FALSE;
8530 
8531 	l1 = argvars[0].vval.v_list;
8532 	l2 = argvars[1].vval.v_list;
8533 	if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
8534 		&& l2 != NULL)
8535 	{
8536 	    if (argvars[2].v_type != VAR_UNKNOWN)
8537 	    {
8538 		before = get_tv_number_chk(&argvars[2], &error);
8539 		if (error)
8540 		    return;		/* type error; errmsg already given */
8541 
8542 		if (before == l1->lv_len)
8543 		    item = NULL;
8544 		else
8545 		{
8546 		    item = list_find(l1, before);
8547 		    if (item == NULL)
8548 		    {
8549 			EMSGN(_(e_listidx), before);
8550 			return;
8551 		    }
8552 		}
8553 	    }
8554 	    else
8555 		item = NULL;
8556 	    list_extend(l1, l2, item);
8557 
8558 	    copy_tv(&argvars[0], rettv);
8559 	}
8560     }
8561     else if (argvars[0].v_type == VAR_DICT && argvars[1].v_type == VAR_DICT)
8562     {
8563 	dict_T		*d1, *d2;
8564 	dictitem_T	*di1;
8565 	char_u		*action;
8566 	int		i;
8567 	hashitem_T	*hi2;
8568 	int		todo;
8569 
8570 	d1 = argvars[0].vval.v_dict;
8571 	d2 = argvars[1].vval.v_dict;
8572 	if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
8573 		&& d2 != NULL)
8574 	{
8575 	    /* Check the third argument. */
8576 	    if (argvars[2].v_type != VAR_UNKNOWN)
8577 	    {
8578 		static char *(av[]) = {"keep", "force", "error"};
8579 
8580 		action = get_tv_string_chk(&argvars[2]);
8581 		if (action == NULL)
8582 		    return;		/* type error; errmsg already given */
8583 		for (i = 0; i < 3; ++i)
8584 		    if (STRCMP(action, av[i]) == 0)
8585 			break;
8586 		if (i == 3)
8587 		{
8588 		    EMSGN(_(e_invarg2), action);
8589 		    return;
8590 		}
8591 	    }
8592 	    else
8593 		action = (char_u *)"force";
8594 
8595 	    /* Go over all entries in the second dict and add them to the
8596 	     * first dict. */
8597 	    todo = d2->dv_hashtab.ht_used;
8598 	    for (hi2 = d2->dv_hashtab.ht_array; todo > 0; ++hi2)
8599 	    {
8600 		if (!HASHITEM_EMPTY(hi2))
8601 		{
8602 		    --todo;
8603 		    di1 = dict_find(d1, hi2->hi_key, -1);
8604 		    if (di1 == NULL)
8605 		    {
8606 			di1 = dictitem_copy(HI2DI(hi2));
8607 			if (di1 != NULL && dict_add(d1, di1) == FAIL)
8608 			    dictitem_free(di1);
8609 		    }
8610 		    else if (*action == 'e')
8611 		    {
8612 			EMSG2(_("E737: Key already exists: %s"), hi2->hi_key);
8613 			break;
8614 		    }
8615 		    else if (*action == 'f')
8616 		    {
8617 			clear_tv(&di1->di_tv);
8618 			copy_tv(&HI2DI(hi2)->di_tv, &di1->di_tv);
8619 		    }
8620 		}
8621 	    }
8622 
8623 	    copy_tv(&argvars[0], rettv);
8624 	}
8625     }
8626     else
8627 	EMSG2(_(e_listdictarg), "extend()");
8628 }
8629 
8630 /*
8631  * "filereadable()" function
8632  */
8633     static void
8634 f_filereadable(argvars, rettv)
8635     typval_T	*argvars;
8636     typval_T	*rettv;
8637 {
8638     FILE	*fd;
8639     char_u	*p;
8640     int		n;
8641 
8642     p = get_tv_string(&argvars[0]);
8643     if (*p && !mch_isdir(p) && (fd = mch_fopen((char *)p, "r")) != NULL)
8644     {
8645 	n = TRUE;
8646 	fclose(fd);
8647     }
8648     else
8649 	n = FALSE;
8650 
8651     rettv->vval.v_number = n;
8652 }
8653 
8654 /*
8655  * Return 0 for not writable, 1 for writable file, 2 for a dir which we have
8656  * rights to write into.
8657  */
8658     static void
8659 f_filewritable(argvars, rettv)
8660     typval_T	*argvars;
8661     typval_T	*rettv;
8662 {
8663     rettv->vval.v_number = filewritable(get_tv_string(&argvars[0]));
8664 }
8665 
8666 static void findfilendir __ARGS((typval_T *argvars, typval_T *rettv, int dir));
8667 
8668     static void
8669 findfilendir(argvars, rettv, dir)
8670     typval_T	*argvars;
8671     typval_T	*rettv;
8672     int		dir;
8673 {
8674 #ifdef FEAT_SEARCHPATH
8675     char_u	*fname;
8676     char_u	*fresult = NULL;
8677     char_u	*path = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
8678     char_u	*p;
8679     char_u	pathbuf[NUMBUFLEN];
8680     int		count = 1;
8681     int		first = TRUE;
8682 
8683     fname = get_tv_string(&argvars[0]);
8684 
8685     if (argvars[1].v_type != VAR_UNKNOWN)
8686     {
8687 	p = get_tv_string_buf_chk(&argvars[1], pathbuf);
8688 	if (p == NULL)
8689 	    count = -1;	    /* error */
8690 	else
8691 	{
8692 	    if (*p != NUL)
8693 		path = p;
8694 
8695 	    if (argvars[2].v_type != VAR_UNKNOWN)
8696 		count = get_tv_number_chk(&argvars[2], NULL); /* -1: error */
8697 	}
8698     }
8699 
8700     if (*fname != NUL && count >= 0)
8701     {
8702 	do
8703 	{
8704 	    vim_free(fresult);
8705 	    fresult = find_file_in_path_option(first ? fname : NULL,
8706 					       first ? (int)STRLEN(fname) : 0,
8707 					       0, first, path, dir, NULL);
8708 	    first = FALSE;
8709 	} while (--count > 0 && fresult != NULL);
8710     }
8711 
8712     rettv->vval.v_string = fresult;
8713 #else
8714     rettv->vval.v_string = NULL;
8715 #endif
8716     rettv->v_type = VAR_STRING;
8717 }
8718 
8719 static void filter_map __ARGS((typval_T *argvars, typval_T *rettv, int map));
8720 static int filter_map_one __ARGS((typval_T *tv, char_u *expr, int map, int *remp));
8721 
8722 /*
8723  * Implementation of map() and filter().
8724  */
8725     static void
8726 filter_map(argvars, rettv, map)
8727     typval_T	*argvars;
8728     typval_T	*rettv;
8729     int		map;
8730 {
8731     char_u	buf[NUMBUFLEN];
8732     char_u	*expr;
8733     listitem_T	*li, *nli;
8734     list_T	*l = NULL;
8735     dictitem_T	*di;
8736     hashtab_T	*ht;
8737     hashitem_T	*hi;
8738     dict_T	*d = NULL;
8739     typval_T	save_val;
8740     typval_T	save_key;
8741     int		rem;
8742     int		todo;
8743     char_u	*msg = map ? (char_u *)"map()" : (char_u *)"filter()";
8744 
8745 
8746     rettv->vval.v_number = 0;
8747     if (argvars[0].v_type == VAR_LIST)
8748     {
8749 	if ((l = argvars[0].vval.v_list) == NULL
8750 		|| (map && tv_check_lock(l->lv_lock, msg)))
8751 	    return;
8752     }
8753     else if (argvars[0].v_type == VAR_DICT)
8754     {
8755 	if ((d = argvars[0].vval.v_dict) == NULL
8756 		|| (map && tv_check_lock(d->dv_lock, msg)))
8757 	    return;
8758     }
8759     else
8760     {
8761 	EMSG2(_(e_listdictarg), msg);
8762 	return;
8763     }
8764 
8765     expr = get_tv_string_buf_chk(&argvars[1], buf);
8766     /* On type errors, the preceding call has already displayed an error
8767      * message.  Avoid a misleading error message for an empty string that
8768      * was not passed as argument. */
8769     if (expr != NULL)
8770     {
8771 	prepare_vimvar(VV_VAL, &save_val);
8772 	expr = skipwhite(expr);
8773 
8774 	if (argvars[0].v_type == VAR_DICT)
8775 	{
8776 	    prepare_vimvar(VV_KEY, &save_key);
8777 	    vimvars[VV_KEY].vv_type = VAR_STRING;
8778 
8779 	    ht = &d->dv_hashtab;
8780 	    hash_lock(ht);
8781 	    todo = ht->ht_used;
8782 	    for (hi = ht->ht_array; todo > 0; ++hi)
8783 	    {
8784 		if (!HASHITEM_EMPTY(hi))
8785 		{
8786 		    --todo;
8787 		    di = HI2DI(hi);
8788 		    if (tv_check_lock(di->di_tv.v_lock, msg))
8789 			break;
8790 		    vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
8791 		    if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL)
8792 			break;
8793 		    if (!map && rem)
8794 			dictitem_remove(d, di);
8795 		    clear_tv(&vimvars[VV_KEY].vv_tv);
8796 		}
8797 	    }
8798 	    hash_unlock(ht);
8799 
8800 	    restore_vimvar(VV_KEY, &save_key);
8801 	}
8802 	else
8803 	{
8804 	    for (li = l->lv_first; li != NULL; li = nli)
8805 	    {
8806 		if (tv_check_lock(li->li_tv.v_lock, msg))
8807 		    break;
8808 		nli = li->li_next;
8809 		if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL)
8810 		    break;
8811 		if (!map && rem)
8812 		    listitem_remove(l, li);
8813 	    }
8814 	}
8815 
8816 	restore_vimvar(VV_VAL, &save_val);
8817     }
8818 
8819     copy_tv(&argvars[0], rettv);
8820 }
8821 
8822     static int
8823 filter_map_one(tv, expr, map, remp)
8824     typval_T	*tv;
8825     char_u	*expr;
8826     int		map;
8827     int		*remp;
8828 {
8829     typval_T	rettv;
8830     char_u	*s;
8831 
8832     copy_tv(tv, &vimvars[VV_VAL].vv_tv);
8833     s = expr;
8834     if (eval1(&s, &rettv, TRUE) == FAIL)
8835 	return FAIL;
8836     if (*s != NUL)  /* check for trailing chars after expr */
8837     {
8838 	EMSG2(_(e_invexpr2), s);
8839 	return FAIL;
8840     }
8841     if (map)
8842     {
8843 	/* map(): replace the list item value */
8844 	clear_tv(tv);
8845 	*tv = rettv;
8846     }
8847     else
8848     {
8849 	int	    error = FALSE;
8850 
8851 	/* filter(): when expr is zero remove the item */
8852 	*remp = (get_tv_number_chk(&rettv, &error) == 0);
8853 	clear_tv(&rettv);
8854 	/* On type error, nothing has been removed; return FAIL to stop the
8855 	 * loop.  The error message was given by get_tv_number_chk(). */
8856 	if (error)
8857 	    return FAIL;
8858     }
8859     clear_tv(&vimvars[VV_VAL].vv_tv);
8860     return OK;
8861 }
8862 
8863 /*
8864  * "filter()" function
8865  */
8866     static void
8867 f_filter(argvars, rettv)
8868     typval_T	*argvars;
8869     typval_T	*rettv;
8870 {
8871     filter_map(argvars, rettv, FALSE);
8872 }
8873 
8874 /*
8875  * "finddir({fname}[, {path}[, {count}]])" function
8876  */
8877     static void
8878 f_finddir(argvars, rettv)
8879     typval_T	*argvars;
8880     typval_T	*rettv;
8881 {
8882     findfilendir(argvars, rettv, TRUE);
8883 }
8884 
8885 /*
8886  * "findfile({fname}[, {path}[, {count}]])" function
8887  */
8888     static void
8889 f_findfile(argvars, rettv)
8890     typval_T	*argvars;
8891     typval_T	*rettv;
8892 {
8893     findfilendir(argvars, rettv, FALSE);
8894 }
8895 
8896 /*
8897  * "fnamemodify({fname}, {mods})" function
8898  */
8899     static void
8900 f_fnamemodify(argvars, rettv)
8901     typval_T	*argvars;
8902     typval_T	*rettv;
8903 {
8904     char_u	*fname;
8905     char_u	*mods;
8906     int		usedlen = 0;
8907     int		len;
8908     char_u	*fbuf = NULL;
8909     char_u	buf[NUMBUFLEN];
8910 
8911     fname = get_tv_string_chk(&argvars[0]);
8912     mods = get_tv_string_buf_chk(&argvars[1], buf);
8913     if (fname == NULL || mods == NULL)
8914 	fname = NULL;
8915     else
8916     {
8917 	len = (int)STRLEN(fname);
8918 	(void)modify_fname(mods, &usedlen, &fname, &fbuf, &len);
8919     }
8920 
8921     rettv->v_type = VAR_STRING;
8922     if (fname == NULL)
8923 	rettv->vval.v_string = NULL;
8924     else
8925 	rettv->vval.v_string = vim_strnsave(fname, len);
8926     vim_free(fbuf);
8927 }
8928 
8929 static void foldclosed_both __ARGS((typval_T *argvars, typval_T *rettv, int end));
8930 
8931 /*
8932  * "foldclosed()" function
8933  */
8934     static void
8935 foldclosed_both(argvars, rettv, end)
8936     typval_T	*argvars;
8937     typval_T	*rettv;
8938     int		end;
8939 {
8940 #ifdef FEAT_FOLDING
8941     linenr_T	lnum;
8942     linenr_T	first, last;
8943 
8944     lnum = get_tv_lnum(argvars);
8945     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8946     {
8947 	if (hasFoldingWin(curwin, lnum, &first, &last, FALSE, NULL))
8948 	{
8949 	    if (end)
8950 		rettv->vval.v_number = (varnumber_T)last;
8951 	    else
8952 		rettv->vval.v_number = (varnumber_T)first;
8953 	    return;
8954 	}
8955     }
8956 #endif
8957     rettv->vval.v_number = -1;
8958 }
8959 
8960 /*
8961  * "foldclosed()" function
8962  */
8963     static void
8964 f_foldclosed(argvars, rettv)
8965     typval_T	*argvars;
8966     typval_T	*rettv;
8967 {
8968     foldclosed_both(argvars, rettv, FALSE);
8969 }
8970 
8971 /*
8972  * "foldclosedend()" function
8973  */
8974     static void
8975 f_foldclosedend(argvars, rettv)
8976     typval_T	*argvars;
8977     typval_T	*rettv;
8978 {
8979     foldclosed_both(argvars, rettv, TRUE);
8980 }
8981 
8982 /*
8983  * "foldlevel()" function
8984  */
8985     static void
8986 f_foldlevel(argvars, rettv)
8987     typval_T	*argvars;
8988     typval_T	*rettv;
8989 {
8990 #ifdef FEAT_FOLDING
8991     linenr_T	lnum;
8992 
8993     lnum = get_tv_lnum(argvars);
8994     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
8995 	rettv->vval.v_number = foldLevel(lnum);
8996     else
8997 #endif
8998 	rettv->vval.v_number = 0;
8999 }
9000 
9001 /*
9002  * "foldtext()" function
9003  */
9004 /*ARGSUSED*/
9005     static void
9006 f_foldtext(argvars, rettv)
9007     typval_T	*argvars;
9008     typval_T	*rettv;
9009 {
9010 #ifdef FEAT_FOLDING
9011     linenr_T	lnum;
9012     char_u	*s;
9013     char_u	*r;
9014     int		len;
9015     char	*txt;
9016 #endif
9017 
9018     rettv->v_type = VAR_STRING;
9019     rettv->vval.v_string = NULL;
9020 #ifdef FEAT_FOLDING
9021     if ((linenr_T)vimvars[VV_FOLDSTART].vv_nr > 0
9022 	    && (linenr_T)vimvars[VV_FOLDEND].vv_nr
9023 						 <= curbuf->b_ml.ml_line_count
9024 	    && vimvars[VV_FOLDDASHES].vv_str != NULL)
9025     {
9026 	/* Find first non-empty line in the fold. */
9027 	lnum = (linenr_T)vimvars[VV_FOLDSTART].vv_nr;
9028 	while (lnum < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9029 	{
9030 	    if (!linewhite(lnum))
9031 		break;
9032 	    ++lnum;
9033 	}
9034 
9035 	/* Find interesting text in this line. */
9036 	s = skipwhite(ml_get(lnum));
9037 	/* skip C comment-start */
9038 	if (s[0] == '/' && (s[1] == '*' || s[1] == '/'))
9039 	{
9040 	    s = skipwhite(s + 2);
9041 	    if (*skipwhite(s) == NUL
9042 			    && lnum + 1 < (linenr_T)vimvars[VV_FOLDEND].vv_nr)
9043 	    {
9044 		s = skipwhite(ml_get(lnum + 1));
9045 		if (*s == '*')
9046 		    s = skipwhite(s + 1);
9047 	    }
9048 	}
9049 	txt = _("+-%s%3ld lines: ");
9050 	r = alloc((unsigned)(STRLEN(txt)
9051 		    + STRLEN(vimvars[VV_FOLDDASHES].vv_str)    /* for %s */
9052 		    + 20				    /* for %3ld */
9053 		    + STRLEN(s)));			    /* concatenated */
9054 	if (r != NULL)
9055 	{
9056 	    sprintf((char *)r, txt, vimvars[VV_FOLDDASHES].vv_str,
9057 		    (long)((linenr_T)vimvars[VV_FOLDEND].vv_nr
9058 				- (linenr_T)vimvars[VV_FOLDSTART].vv_nr + 1));
9059 	    len = (int)STRLEN(r);
9060 	    STRCAT(r, s);
9061 	    /* remove 'foldmarker' and 'commentstring' */
9062 	    foldtext_cleanup(r + len);
9063 	    rettv->vval.v_string = r;
9064 	}
9065     }
9066 #endif
9067 }
9068 
9069 /*
9070  * "foldtextresult(lnum)" function
9071  */
9072 /*ARGSUSED*/
9073     static void
9074 f_foldtextresult(argvars, rettv)
9075     typval_T	*argvars;
9076     typval_T	*rettv;
9077 {
9078 #ifdef FEAT_FOLDING
9079     linenr_T	lnum;
9080     char_u	*text;
9081     char_u	buf[51];
9082     foldinfo_T  foldinfo;
9083     int		fold_count;
9084 #endif
9085 
9086     rettv->v_type = VAR_STRING;
9087     rettv->vval.v_string = NULL;
9088 #ifdef FEAT_FOLDING
9089     lnum = get_tv_lnum(argvars);
9090     /* treat illegal types and illegal string values for {lnum} the same */
9091     if (lnum < 0)
9092 	lnum = 0;
9093     fold_count = foldedCount(curwin, lnum, &foldinfo);
9094     if (fold_count > 0)
9095     {
9096 	text = get_foldtext(curwin, lnum, lnum + fold_count - 1,
9097 							      &foldinfo, buf);
9098 	if (text == buf)
9099 	    text = vim_strsave(text);
9100 	rettv->vval.v_string = text;
9101     }
9102 #endif
9103 }
9104 
9105 /*
9106  * "foreground()" function
9107  */
9108 /*ARGSUSED*/
9109     static void
9110 f_foreground(argvars, rettv)
9111     typval_T	*argvars;
9112     typval_T	*rettv;
9113 {
9114     rettv->vval.v_number = 0;
9115 #ifdef FEAT_GUI
9116     if (gui.in_use)
9117 	gui_mch_set_foreground();
9118 #else
9119 # ifdef WIN32
9120     win32_set_foreground();
9121 # endif
9122 #endif
9123 }
9124 
9125 /*
9126  * "function()" function
9127  */
9128 /*ARGSUSED*/
9129     static void
9130 f_function(argvars, rettv)
9131     typval_T	*argvars;
9132     typval_T	*rettv;
9133 {
9134     char_u	*s;
9135 
9136     rettv->vval.v_number = 0;
9137     s = get_tv_string(&argvars[0]);
9138     if (s == NULL || *s == NUL || VIM_ISDIGIT(*s))
9139 	EMSG2(_(e_invarg2), s);
9140     else if (!function_exists(s))
9141 	EMSG2(_("E700: Unknown function: %s"), s);
9142     else
9143     {
9144 	rettv->vval.v_string = vim_strsave(s);
9145 	rettv->v_type = VAR_FUNC;
9146     }
9147 }
9148 
9149 /*
9150  * "garbagecollect()" function
9151  */
9152 /*ARGSUSED*/
9153     static void
9154 f_garbagecollect(argvars, rettv)
9155     typval_T	*argvars;
9156     typval_T	*rettv;
9157 {
9158     garbage_collect();
9159 }
9160 
9161 /*
9162  * "get()" function
9163  */
9164     static void
9165 f_get(argvars, rettv)
9166     typval_T	*argvars;
9167     typval_T	*rettv;
9168 {
9169     listitem_T	*li;
9170     list_T	*l;
9171     dictitem_T	*di;
9172     dict_T	*d;
9173     typval_T	*tv = NULL;
9174 
9175     if (argvars[0].v_type == VAR_LIST)
9176     {
9177 	if ((l = argvars[0].vval.v_list) != NULL)
9178 	{
9179 	    int		error = FALSE;
9180 
9181 	    li = list_find(l, get_tv_number_chk(&argvars[1], &error));
9182 	    if (!error && li != NULL)
9183 		tv = &li->li_tv;
9184 	}
9185     }
9186     else if (argvars[0].v_type == VAR_DICT)
9187     {
9188 	if ((d = argvars[0].vval.v_dict) != NULL)
9189 	{
9190 	    di = dict_find(d, get_tv_string(&argvars[1]), -1);
9191 	    if (di != NULL)
9192 		tv = &di->di_tv;
9193 	}
9194     }
9195     else
9196 	EMSG2(_(e_listdictarg), "get()");
9197 
9198     if (tv == NULL)
9199     {
9200 	if (argvars[2].v_type == VAR_UNKNOWN)
9201 	    rettv->vval.v_number = 0;
9202 	else
9203 	    copy_tv(&argvars[2], rettv);
9204     }
9205     else
9206 	copy_tv(tv, rettv);
9207 }
9208 
9209 static void get_buffer_lines __ARGS((buf_T *buf, linenr_T start, linenr_T end, int retlist, typval_T *rettv));
9210 
9211 /*
9212  * Get line or list of lines from buffer "buf" into "rettv".
9213  * Return a range (from start to end) of lines in rettv from the specified
9214  * buffer.
9215  * If 'retlist' is TRUE, then the lines are returned as a Vim List.
9216  */
9217     static void
9218 get_buffer_lines(buf, start, end, retlist, rettv)
9219     buf_T	*buf;
9220     linenr_T	start;
9221     linenr_T	end;
9222     int		retlist;
9223     typval_T	*rettv;
9224 {
9225     char_u	*p;
9226     list_T	*l = NULL;
9227 
9228     if (retlist)
9229     {
9230 	l = list_alloc();
9231 	if (l == NULL)
9232 	    return;
9233 
9234 	rettv->vval.v_list = l;
9235 	rettv->v_type = VAR_LIST;
9236 	++l->lv_refcount;
9237     }
9238     else
9239 	rettv->vval.v_number = 0;
9240 
9241     if (buf == NULL || buf->b_ml.ml_mfp == NULL || start < 0)
9242 	return;
9243 
9244     if (!retlist)
9245     {
9246 	if (start >= 1 && start <= buf->b_ml.ml_line_count)
9247 	    p = ml_get_buf(buf, start, FALSE);
9248 	else
9249 	    p = (char_u *)"";
9250 
9251 	rettv->v_type = VAR_STRING;
9252 	rettv->vval.v_string = vim_strsave(p);
9253     }
9254     else
9255     {
9256 	if (end < start)
9257 	    return;
9258 
9259 	if (start < 1)
9260 	    start = 1;
9261 	if (end > buf->b_ml.ml_line_count)
9262 	    end = buf->b_ml.ml_line_count;
9263 	while (start <= end)
9264 	    if (list_append_string(l, ml_get_buf(buf, start++, FALSE)) == FAIL)
9265 		break;
9266     }
9267 }
9268 
9269 /*
9270  * "getbufline()" function
9271  */
9272     static void
9273 f_getbufline(argvars, rettv)
9274     typval_T	*argvars;
9275     typval_T	*rettv;
9276 {
9277     linenr_T	lnum;
9278     linenr_T	end;
9279     buf_T	*buf;
9280 
9281     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9282     ++emsg_off;
9283     buf = get_buf_tv(&argvars[0]);
9284     --emsg_off;
9285 
9286     lnum = get_tv_lnum_buf(&argvars[1], buf);
9287     if (argvars[2].v_type == VAR_UNKNOWN)
9288 	end = lnum;
9289     else
9290 	end = get_tv_lnum_buf(&argvars[2], buf);
9291 
9292     get_buffer_lines(buf, lnum, end, TRUE, rettv);
9293 }
9294 
9295 /*
9296  * "getbufvar()" function
9297  */
9298     static void
9299 f_getbufvar(argvars, rettv)
9300     typval_T	*argvars;
9301     typval_T	*rettv;
9302 {
9303     buf_T	*buf;
9304     buf_T	*save_curbuf;
9305     char_u	*varname;
9306     dictitem_T	*v;
9307 
9308     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
9309     varname = get_tv_string_chk(&argvars[1]);
9310     ++emsg_off;
9311     buf = get_buf_tv(&argvars[0]);
9312 
9313     rettv->v_type = VAR_STRING;
9314     rettv->vval.v_string = NULL;
9315 
9316     if (buf != NULL && varname != NULL)
9317     {
9318 	if (*varname == '&')	/* buffer-local-option */
9319 	{
9320 	    /* set curbuf to be our buf, temporarily */
9321 	    save_curbuf = curbuf;
9322 	    curbuf = buf;
9323 
9324 	    get_option_tv(&varname, rettv, TRUE);
9325 
9326 	    /* restore previous notion of curbuf */
9327 	    curbuf = save_curbuf;
9328 	}
9329 	else
9330 	{
9331 	    if (*varname == NUL)
9332 		/* let getbufvar({nr}, "") return the "b:" dictionary.  The
9333 		 * scope prefix before the NUL byte is required by
9334 		 * find_var_in_ht(). */
9335 		varname = (char_u *)"b:" + 2;
9336 	    /* look up the variable */
9337 	    v = find_var_in_ht(&buf->b_vars.dv_hashtab, varname, FALSE);
9338 	    if (v != NULL)
9339 		copy_tv(&v->di_tv, rettv);
9340 	}
9341     }
9342 
9343     --emsg_off;
9344 }
9345 
9346 /*
9347  * "getchar()" function
9348  */
9349     static void
9350 f_getchar(argvars, rettv)
9351     typval_T	*argvars;
9352     typval_T	*rettv;
9353 {
9354     varnumber_T		n;
9355     int			error = FALSE;
9356 
9357     ++no_mapping;
9358     ++allow_keys;
9359     if (argvars[0].v_type == VAR_UNKNOWN)
9360 	/* getchar(): blocking wait. */
9361 	n = safe_vgetc();
9362     else if (get_tv_number_chk(&argvars[0], &error) == 1)
9363 	/* getchar(1): only check if char avail */
9364 	n = vpeekc();
9365     else if (error || vpeekc() == NUL)
9366 	/* illegal argument or getchar(0) and no char avail: return zero */
9367 	n = 0;
9368     else
9369 	/* getchar(0) and char avail: return char */
9370 	n = safe_vgetc();
9371     --no_mapping;
9372     --allow_keys;
9373 
9374     rettv->vval.v_number = n;
9375     if (IS_SPECIAL(n) || mod_mask != 0)
9376     {
9377 	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
9378 	int		i = 0;
9379 
9380 	/* Turn a special key into three bytes, plus modifier. */
9381 	if (mod_mask != 0)
9382 	{
9383 	    temp[i++] = K_SPECIAL;
9384 	    temp[i++] = KS_MODIFIER;
9385 	    temp[i++] = mod_mask;
9386 	}
9387 	if (IS_SPECIAL(n))
9388 	{
9389 	    temp[i++] = K_SPECIAL;
9390 	    temp[i++] = K_SECOND(n);
9391 	    temp[i++] = K_THIRD(n);
9392 	}
9393 #ifdef FEAT_MBYTE
9394 	else if (has_mbyte)
9395 	    i += (*mb_char2bytes)(n, temp + i);
9396 #endif
9397 	else
9398 	    temp[i++] = n;
9399 	temp[i++] = NUL;
9400 	rettv->v_type = VAR_STRING;
9401 	rettv->vval.v_string = vim_strsave(temp);
9402     }
9403 }
9404 
9405 /*
9406  * "getcharmod()" function
9407  */
9408 /*ARGSUSED*/
9409     static void
9410 f_getcharmod(argvars, rettv)
9411     typval_T	*argvars;
9412     typval_T	*rettv;
9413 {
9414     rettv->vval.v_number = mod_mask;
9415 }
9416 
9417 /*
9418  * "getcmdline()" function
9419  */
9420 /*ARGSUSED*/
9421     static void
9422 f_getcmdline(argvars, rettv)
9423     typval_T	*argvars;
9424     typval_T	*rettv;
9425 {
9426     rettv->v_type = VAR_STRING;
9427     rettv->vval.v_string = get_cmdline_str();
9428 }
9429 
9430 /*
9431  * "getcmdpos()" function
9432  */
9433 /*ARGSUSED*/
9434     static void
9435 f_getcmdpos(argvars, rettv)
9436     typval_T	*argvars;
9437     typval_T	*rettv;
9438 {
9439     rettv->vval.v_number = get_cmdline_pos() + 1;
9440 }
9441 
9442 /*
9443  * "getcmdtype()" function
9444  */
9445 /*ARGSUSED*/
9446     static void
9447 f_getcmdtype(argvars, rettv)
9448     typval_T	*argvars;
9449     typval_T	*rettv;
9450 {
9451     rettv->v_type = VAR_STRING;
9452     rettv->vval.v_string = alloc(2);
9453     if (rettv->vval.v_string != NULL)
9454     {
9455 	rettv->vval.v_string[0] = get_cmdline_type();
9456 	rettv->vval.v_string[1] = NUL;
9457     }
9458 }
9459 
9460 /*
9461  * "getcwd()" function
9462  */
9463 /*ARGSUSED*/
9464     static void
9465 f_getcwd(argvars, rettv)
9466     typval_T	*argvars;
9467     typval_T	*rettv;
9468 {
9469     char_u	cwd[MAXPATHL];
9470 
9471     rettv->v_type = VAR_STRING;
9472     if (mch_dirname(cwd, MAXPATHL) == FAIL)
9473 	rettv->vval.v_string = NULL;
9474     else
9475     {
9476 	rettv->vval.v_string = vim_strsave(cwd);
9477 #ifdef BACKSLASH_IN_FILENAME
9478 	if (rettv->vval.v_string != NULL)
9479 	    slash_adjust(rettv->vval.v_string);
9480 #endif
9481     }
9482 }
9483 
9484 /*
9485  * "getfontname()" function
9486  */
9487 /*ARGSUSED*/
9488     static void
9489 f_getfontname(argvars, rettv)
9490     typval_T	*argvars;
9491     typval_T	*rettv;
9492 {
9493     rettv->v_type = VAR_STRING;
9494     rettv->vval.v_string = NULL;
9495 #ifdef FEAT_GUI
9496     if (gui.in_use)
9497     {
9498 	GuiFont font;
9499 	char_u	*name = NULL;
9500 
9501 	if (argvars[0].v_type == VAR_UNKNOWN)
9502 	{
9503 	    /* Get the "Normal" font.  Either the name saved by
9504 	     * hl_set_font_name() or from the font ID. */
9505 	    font = gui.norm_font;
9506 	    name = hl_get_font_name();
9507 	}
9508 	else
9509 	{
9510 	    name = get_tv_string(&argvars[0]);
9511 	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
9512 		return;
9513 	    font = gui_mch_get_font(name, FALSE);
9514 	    if (font == NOFONT)
9515 		return;	    /* Invalid font name, return empty string. */
9516 	}
9517 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
9518 	if (argvars[0].v_type != VAR_UNKNOWN)
9519 	    gui_mch_free_font(font);
9520     }
9521 #endif
9522 }
9523 
9524 /*
9525  * "getfperm({fname})" function
9526  */
9527     static void
9528 f_getfperm(argvars, rettv)
9529     typval_T	*argvars;
9530     typval_T	*rettv;
9531 {
9532     char_u	*fname;
9533     struct stat st;
9534     char_u	*perm = NULL;
9535     char_u	flags[] = "rwx";
9536     int		i;
9537 
9538     fname = get_tv_string(&argvars[0]);
9539 
9540     rettv->v_type = VAR_STRING;
9541     if (mch_stat((char *)fname, &st) >= 0)
9542     {
9543 	perm = vim_strsave((char_u *)"---------");
9544 	if (perm != NULL)
9545 	{
9546 	    for (i = 0; i < 9; i++)
9547 	    {
9548 		if (st.st_mode & (1 << (8 - i)))
9549 		    perm[i] = flags[i % 3];
9550 	    }
9551 	}
9552     }
9553     rettv->vval.v_string = perm;
9554 }
9555 
9556 /*
9557  * "getfsize({fname})" function
9558  */
9559     static void
9560 f_getfsize(argvars, rettv)
9561     typval_T	*argvars;
9562     typval_T	*rettv;
9563 {
9564     char_u	*fname;
9565     struct stat	st;
9566 
9567     fname = get_tv_string(&argvars[0]);
9568 
9569     rettv->v_type = VAR_NUMBER;
9570 
9571     if (mch_stat((char *)fname, &st) >= 0)
9572     {
9573 	if (mch_isdir(fname))
9574 	    rettv->vval.v_number = 0;
9575 	else
9576 	    rettv->vval.v_number = (varnumber_T)st.st_size;
9577     }
9578     else
9579 	  rettv->vval.v_number = -1;
9580 }
9581 
9582 /*
9583  * "getftime({fname})" function
9584  */
9585     static void
9586 f_getftime(argvars, rettv)
9587     typval_T	*argvars;
9588     typval_T	*rettv;
9589 {
9590     char_u	*fname;
9591     struct stat	st;
9592 
9593     fname = get_tv_string(&argvars[0]);
9594 
9595     if (mch_stat((char *)fname, &st) >= 0)
9596 	rettv->vval.v_number = (varnumber_T)st.st_mtime;
9597     else
9598 	rettv->vval.v_number = -1;
9599 }
9600 
9601 /*
9602  * "getftype({fname})" function
9603  */
9604     static void
9605 f_getftype(argvars, rettv)
9606     typval_T	*argvars;
9607     typval_T	*rettv;
9608 {
9609     char_u	*fname;
9610     struct stat st;
9611     char_u	*type = NULL;
9612     char	*t;
9613 
9614     fname = get_tv_string(&argvars[0]);
9615 
9616     rettv->v_type = VAR_STRING;
9617     if (mch_lstat((char *)fname, &st) >= 0)
9618     {
9619 #ifdef S_ISREG
9620 	if (S_ISREG(st.st_mode))
9621 	    t = "file";
9622 	else if (S_ISDIR(st.st_mode))
9623 	    t = "dir";
9624 # ifdef S_ISLNK
9625 	else if (S_ISLNK(st.st_mode))
9626 	    t = "link";
9627 # endif
9628 # ifdef S_ISBLK
9629 	else if (S_ISBLK(st.st_mode))
9630 	    t = "bdev";
9631 # endif
9632 # ifdef S_ISCHR
9633 	else if (S_ISCHR(st.st_mode))
9634 	    t = "cdev";
9635 # endif
9636 # ifdef S_ISFIFO
9637 	else if (S_ISFIFO(st.st_mode))
9638 	    t = "fifo";
9639 # endif
9640 # ifdef S_ISSOCK
9641 	else if (S_ISSOCK(st.st_mode))
9642 	    t = "fifo";
9643 # endif
9644 	else
9645 	    t = "other";
9646 #else
9647 # ifdef S_IFMT
9648 	switch (st.st_mode & S_IFMT)
9649 	{
9650 	    case S_IFREG: t = "file"; break;
9651 	    case S_IFDIR: t = "dir"; break;
9652 #  ifdef S_IFLNK
9653 	    case S_IFLNK: t = "link"; break;
9654 #  endif
9655 #  ifdef S_IFBLK
9656 	    case S_IFBLK: t = "bdev"; break;
9657 #  endif
9658 #  ifdef S_IFCHR
9659 	    case S_IFCHR: t = "cdev"; break;
9660 #  endif
9661 #  ifdef S_IFIFO
9662 	    case S_IFIFO: t = "fifo"; break;
9663 #  endif
9664 #  ifdef S_IFSOCK
9665 	    case S_IFSOCK: t = "socket"; break;
9666 #  endif
9667 	    default: t = "other";
9668 	}
9669 # else
9670 	if (mch_isdir(fname))
9671 	    t = "dir";
9672 	else
9673 	    t = "file";
9674 # endif
9675 #endif
9676 	type = vim_strsave((char_u *)t);
9677     }
9678     rettv->vval.v_string = type;
9679 }
9680 
9681 /*
9682  * "getline(lnum, [end])" function
9683  */
9684     static void
9685 f_getline(argvars, rettv)
9686     typval_T	*argvars;
9687     typval_T	*rettv;
9688 {
9689     linenr_T	lnum;
9690     linenr_T	end;
9691     int		retlist;
9692 
9693     lnum = get_tv_lnum(argvars);
9694     if (argvars[1].v_type == VAR_UNKNOWN)
9695     {
9696 	end = 0;
9697 	retlist = FALSE;
9698     }
9699     else
9700     {
9701 	end = get_tv_lnum(&argvars[1]);
9702 	retlist = TRUE;
9703     }
9704 
9705     get_buffer_lines(curbuf, lnum, end, retlist, rettv);
9706 }
9707 
9708 /*
9709  * "getqflist()" function
9710  */
9711 /*ARGSUSED*/
9712     static void
9713 f_getqflist(argvars, rettv)
9714     typval_T	*argvars;
9715     typval_T	*rettv;
9716 {
9717 #ifdef FEAT_QUICKFIX
9718     list_T	*l;
9719 #endif
9720 
9721     rettv->vval.v_number = FALSE;
9722 #ifdef FEAT_QUICKFIX
9723     l = list_alloc();
9724     if (l != NULL)
9725     {
9726 	rettv->vval.v_list = l;
9727 	rettv->v_type = VAR_LIST;
9728 	++l->lv_refcount;
9729 	(void)get_errorlist(l);
9730     }
9731 #endif
9732 }
9733 
9734 /*
9735  * "getreg()" function
9736  */
9737     static void
9738 f_getreg(argvars, rettv)
9739     typval_T	*argvars;
9740     typval_T	*rettv;
9741 {
9742     char_u	*strregname;
9743     int		regname;
9744     int		arg2 = FALSE;
9745     int		error = FALSE;
9746 
9747     if (argvars[0].v_type != VAR_UNKNOWN)
9748     {
9749 	strregname = get_tv_string_chk(&argvars[0]);
9750 	error = strregname == NULL;
9751 	if (argvars[1].v_type != VAR_UNKNOWN)
9752 	    arg2 = get_tv_number_chk(&argvars[1], &error);
9753     }
9754     else
9755 	strregname = vimvars[VV_REG].vv_str;
9756     regname = (strregname == NULL ? '"' : *strregname);
9757     if (regname == 0)
9758 	regname = '"';
9759 
9760     rettv->v_type = VAR_STRING;
9761     rettv->vval.v_string = error ? NULL :
9762 				    get_reg_contents(regname, TRUE, arg2);
9763 }
9764 
9765 /*
9766  * "getregtype()" function
9767  */
9768     static void
9769 f_getregtype(argvars, rettv)
9770     typval_T	*argvars;
9771     typval_T	*rettv;
9772 {
9773     char_u	*strregname;
9774     int		regname;
9775     char_u	buf[NUMBUFLEN + 2];
9776     long	reglen = 0;
9777 
9778     if (argvars[0].v_type != VAR_UNKNOWN)
9779     {
9780 	strregname = get_tv_string_chk(&argvars[0]);
9781 	if (strregname == NULL)	    /* type error; errmsg already given */
9782 	{
9783 	    rettv->v_type = VAR_STRING;
9784 	    rettv->vval.v_string = NULL;
9785 	    return;
9786 	}
9787     }
9788     else
9789 	/* Default to v:register */
9790 	strregname = vimvars[VV_REG].vv_str;
9791 
9792     regname = (strregname == NULL ? '"' : *strregname);
9793     if (regname == 0)
9794 	regname = '"';
9795 
9796     buf[0] = NUL;
9797     buf[1] = NUL;
9798     switch (get_reg_type(regname, &reglen))
9799     {
9800 	case MLINE: buf[0] = 'V'; break;
9801 	case MCHAR: buf[0] = 'v'; break;
9802 #ifdef FEAT_VISUAL
9803 	case MBLOCK:
9804 		buf[0] = Ctrl_V;
9805 		sprintf((char *)buf + 1, "%ld", reglen + 1);
9806 		break;
9807 #endif
9808     }
9809     rettv->v_type = VAR_STRING;
9810     rettv->vval.v_string = vim_strsave(buf);
9811 }
9812 
9813 /*
9814  * "getwinposx()" function
9815  */
9816 /*ARGSUSED*/
9817     static void
9818 f_getwinposx(argvars, rettv)
9819     typval_T	*argvars;
9820     typval_T	*rettv;
9821 {
9822     rettv->vval.v_number = -1;
9823 #ifdef FEAT_GUI
9824     if (gui.in_use)
9825     {
9826 	int	    x, y;
9827 
9828 	if (gui_mch_get_winpos(&x, &y) == OK)
9829 	    rettv->vval.v_number = x;
9830     }
9831 #endif
9832 }
9833 
9834 /*
9835  * "getwinposy()" function
9836  */
9837 /*ARGSUSED*/
9838     static void
9839 f_getwinposy(argvars, rettv)
9840     typval_T	*argvars;
9841     typval_T	*rettv;
9842 {
9843     rettv->vval.v_number = -1;
9844 #ifdef FEAT_GUI
9845     if (gui.in_use)
9846     {
9847 	int	    x, y;
9848 
9849 	if (gui_mch_get_winpos(&x, &y) == OK)
9850 	    rettv->vval.v_number = y;
9851     }
9852 #endif
9853 }
9854 
9855 static win_T *find_win_by_nr __ARGS((typval_T *vp));
9856 
9857     static win_T *
9858 find_win_by_nr(vp)
9859     typval_T	*vp;
9860 {
9861 #ifdef FEAT_WINDOWS
9862     win_T	*wp;
9863 #endif
9864     int		nr;
9865 
9866     nr = get_tv_number_chk(vp, NULL);
9867 
9868 #ifdef FEAT_WINDOWS
9869     if (nr < 0)
9870 	return NULL;
9871     if (nr == 0)
9872 	return curwin;
9873 
9874     for (wp = firstwin; wp != NULL; wp = wp->w_next)
9875 	if (--nr <= 0)
9876 	    break;
9877     return wp;
9878 #else
9879     if (nr == 0 || nr == 1)
9880 	return curwin;
9881     return NULL;
9882 #endif
9883 }
9884 
9885 /*
9886  * "getwinvar()" function
9887  */
9888     static void
9889 f_getwinvar(argvars, rettv)
9890     typval_T	*argvars;
9891     typval_T	*rettv;
9892 {
9893     win_T	*win, *oldcurwin;
9894     char_u	*varname;
9895     dictitem_T	*v;
9896 
9897     win = find_win_by_nr(&argvars[0]);
9898     varname = get_tv_string_chk(&argvars[1]);
9899     ++emsg_off;
9900 
9901     rettv->v_type = VAR_STRING;
9902     rettv->vval.v_string = NULL;
9903 
9904     if (win != NULL && varname != NULL)
9905     {
9906 	if (*varname == '&')	/* window-local-option */
9907 	{
9908 	    /* Set curwin to be our win, temporarily.  Also set curbuf, so
9909 	     * that we can get buffer-local options. */
9910 	    oldcurwin = curwin;
9911 	    curwin = win;
9912 	    curbuf = win->w_buffer;
9913 
9914 	    get_option_tv(&varname, rettv, 1);
9915 
9916 	    /* restore previous notion of curwin */
9917 	    curwin = oldcurwin;
9918 	    curbuf = curwin->w_buffer;
9919 	}
9920 	else
9921 	{
9922 	    if (*varname == NUL)
9923 		/* let getwinvar({nr}, "") return the "w:" dictionary.  The
9924 		 * scope prefix before the NUL byte is required by
9925 		 * find_var_in_ht(). */
9926 		varname = (char_u *)"w:" + 2;
9927 	    /* look up the variable */
9928 	    v = find_var_in_ht(&win->w_vars.dv_hashtab, varname, FALSE);
9929 	    if (v != NULL)
9930 		copy_tv(&v->di_tv, rettv);
9931 	}
9932     }
9933 
9934     --emsg_off;
9935 }
9936 
9937 /*
9938  * "glob()" function
9939  */
9940     static void
9941 f_glob(argvars, rettv)
9942     typval_T	*argvars;
9943     typval_T	*rettv;
9944 {
9945     expand_T	xpc;
9946 
9947     ExpandInit(&xpc);
9948     xpc.xp_context = EXPAND_FILES;
9949     rettv->v_type = VAR_STRING;
9950     rettv->vval.v_string = ExpandOne(&xpc, get_tv_string(&argvars[0]),
9951 				     NULL, WILD_USE_NL|WILD_SILENT, WILD_ALL);
9952     ExpandCleanup(&xpc);
9953 }
9954 
9955 /*
9956  * "globpath()" function
9957  */
9958     static void
9959 f_globpath(argvars, rettv)
9960     typval_T	*argvars;
9961     typval_T	*rettv;
9962 {
9963     char_u	buf1[NUMBUFLEN];
9964     char_u	*file = get_tv_string_buf_chk(&argvars[1], buf1);
9965 
9966     rettv->v_type = VAR_STRING;
9967     if (file == NULL)
9968 	rettv->vval.v_string = NULL;
9969     else
9970 	rettv->vval.v_string = globpath(get_tv_string(&argvars[0]), file);
9971 }
9972 
9973 /*
9974  * "has()" function
9975  */
9976     static void
9977 f_has(argvars, rettv)
9978     typval_T	*argvars;
9979     typval_T	*rettv;
9980 {
9981     int		i;
9982     char_u	*name;
9983     int		n = FALSE;
9984     static char	*(has_list[]) =
9985     {
9986 #ifdef AMIGA
9987 	"amiga",
9988 # ifdef FEAT_ARP
9989 	"arp",
9990 # endif
9991 #endif
9992 #ifdef __BEOS__
9993 	"beos",
9994 #endif
9995 #ifdef MSDOS
9996 # ifdef DJGPP
9997 	"dos32",
9998 # else
9999 	"dos16",
10000 # endif
10001 #endif
10002 #ifdef MACOS /* TODO: Should we add MACOS_CLASSIC, MACOS_X? (Dany) */
10003 	"mac",
10004 #endif
10005 #if defined(MACOS_X_UNIX)
10006 	"macunix",
10007 #endif
10008 #ifdef OS2
10009 	"os2",
10010 #endif
10011 #ifdef __QNX__
10012 	"qnx",
10013 #endif
10014 #ifdef RISCOS
10015 	"riscos",
10016 #endif
10017 #ifdef UNIX
10018 	"unix",
10019 #endif
10020 #ifdef VMS
10021 	"vms",
10022 #endif
10023 #ifdef WIN16
10024 	"win16",
10025 #endif
10026 #ifdef WIN32
10027 	"win32",
10028 #endif
10029 #if defined(UNIX) && (defined(__CYGWIN32__) || defined(__CYGWIN__))
10030 	"win32unix",
10031 #endif
10032 #ifdef WIN64
10033 	"win64",
10034 #endif
10035 #ifdef EBCDIC
10036 	"ebcdic",
10037 #endif
10038 #ifndef CASE_INSENSITIVE_FILENAME
10039 	"fname_case",
10040 #endif
10041 #ifdef FEAT_ARABIC
10042 	"arabic",
10043 #endif
10044 #ifdef FEAT_AUTOCMD
10045 	"autocmd",
10046 #endif
10047 #ifdef FEAT_BEVAL
10048 	"balloon_eval",
10049 # ifndef FEAT_GUI_W32 /* other GUIs always have multiline balloons */
10050 	"balloon_multiline",
10051 # endif
10052 #endif
10053 #if defined(SOME_BUILTIN_TCAPS) || defined(ALL_BUILTIN_TCAPS)
10054 	"builtin_terms",
10055 # ifdef ALL_BUILTIN_TCAPS
10056 	"all_builtin_terms",
10057 # endif
10058 #endif
10059 #ifdef FEAT_BYTEOFF
10060 	"byte_offset",
10061 #endif
10062 #ifdef FEAT_CINDENT
10063 	"cindent",
10064 #endif
10065 #ifdef FEAT_CLIENTSERVER
10066 	"clientserver",
10067 #endif
10068 #ifdef FEAT_CLIPBOARD
10069 	"clipboard",
10070 #endif
10071 #ifdef FEAT_CMDL_COMPL
10072 	"cmdline_compl",
10073 #endif
10074 #ifdef FEAT_CMDHIST
10075 	"cmdline_hist",
10076 #endif
10077 #ifdef FEAT_COMMENTS
10078 	"comments",
10079 #endif
10080 #ifdef FEAT_CRYPT
10081 	"cryptv",
10082 #endif
10083 #ifdef FEAT_CSCOPE
10084 	"cscope",
10085 #endif
10086 #ifdef CURSOR_SHAPE
10087 	"cursorshape",
10088 #endif
10089 #ifdef DEBUG
10090 	"debug",
10091 #endif
10092 #ifdef FEAT_CON_DIALOG
10093 	"dialog_con",
10094 #endif
10095 #ifdef FEAT_GUI_DIALOG
10096 	"dialog_gui",
10097 #endif
10098 #ifdef FEAT_DIFF
10099 	"diff",
10100 #endif
10101 #ifdef FEAT_DIGRAPHS
10102 	"digraphs",
10103 #endif
10104 #ifdef FEAT_DND
10105 	"dnd",
10106 #endif
10107 #ifdef FEAT_EMACS_TAGS
10108 	"emacs_tags",
10109 #endif
10110 	"eval",	    /* always present, of course! */
10111 #ifdef FEAT_EX_EXTRA
10112 	"ex_extra",
10113 #endif
10114 #ifdef FEAT_SEARCH_EXTRA
10115 	"extra_search",
10116 #endif
10117 #ifdef FEAT_FKMAP
10118 	"farsi",
10119 #endif
10120 #ifdef FEAT_SEARCHPATH
10121 	"file_in_path",
10122 #endif
10123 #if defined(UNIX) && !defined(USE_SYSTEM)
10124 	"filterpipe",
10125 #endif
10126 #ifdef FEAT_FIND_ID
10127 	"find_in_path",
10128 #endif
10129 #ifdef FEAT_FOLDING
10130 	"folding",
10131 #endif
10132 #ifdef FEAT_FOOTER
10133 	"footer",
10134 #endif
10135 #if !defined(USE_SYSTEM) && defined(UNIX)
10136 	"fork",
10137 #endif
10138 #ifdef FEAT_GETTEXT
10139 	"gettext",
10140 #endif
10141 #ifdef FEAT_GUI
10142 	"gui",
10143 #endif
10144 #ifdef FEAT_GUI_ATHENA
10145 # ifdef FEAT_GUI_NEXTAW
10146 	"gui_neXtaw",
10147 # else
10148 	"gui_athena",
10149 # endif
10150 #endif
10151 #ifdef FEAT_GUI_KDE
10152 	"gui_kde",
10153 #endif
10154 #ifdef FEAT_GUI_GTK
10155 	"gui_gtk",
10156 # ifdef HAVE_GTK2
10157 	"gui_gtk2",
10158 # endif
10159 #endif
10160 #ifdef FEAT_GUI_MAC
10161 	"gui_mac",
10162 #endif
10163 #ifdef FEAT_GUI_MOTIF
10164 	"gui_motif",
10165 #endif
10166 #ifdef FEAT_GUI_PHOTON
10167 	"gui_photon",
10168 #endif
10169 #ifdef FEAT_GUI_W16
10170 	"gui_win16",
10171 #endif
10172 #ifdef FEAT_GUI_W32
10173 	"gui_win32",
10174 #endif
10175 #ifdef FEAT_HANGULIN
10176 	"hangul_input",
10177 #endif
10178 #if defined(HAVE_ICONV_H) && defined(USE_ICONV)
10179 	"iconv",
10180 #endif
10181 #ifdef FEAT_INS_EXPAND
10182 	"insert_expand",
10183 #endif
10184 #ifdef FEAT_JUMPLIST
10185 	"jumplist",
10186 #endif
10187 #ifdef FEAT_KEYMAP
10188 	"keymap",
10189 #endif
10190 #ifdef FEAT_LANGMAP
10191 	"langmap",
10192 #endif
10193 #ifdef FEAT_LIBCALL
10194 	"libcall",
10195 #endif
10196 #ifdef FEAT_LINEBREAK
10197 	"linebreak",
10198 #endif
10199 #ifdef FEAT_LISP
10200 	"lispindent",
10201 #endif
10202 #ifdef FEAT_LISTCMDS
10203 	"listcmds",
10204 #endif
10205 #ifdef FEAT_LOCALMAP
10206 	"localmap",
10207 #endif
10208 #ifdef FEAT_MENU
10209 	"menu",
10210 #endif
10211 #ifdef FEAT_SESSION
10212 	"mksession",
10213 #endif
10214 #ifdef FEAT_MODIFY_FNAME
10215 	"modify_fname",
10216 #endif
10217 #ifdef FEAT_MOUSE
10218 	"mouse",
10219 #endif
10220 #ifdef FEAT_MOUSESHAPE
10221 	"mouseshape",
10222 #endif
10223 #if defined(UNIX) || defined(VMS)
10224 # ifdef FEAT_MOUSE_DEC
10225 	"mouse_dec",
10226 # endif
10227 # ifdef FEAT_MOUSE_GPM
10228 	"mouse_gpm",
10229 # endif
10230 # ifdef FEAT_MOUSE_JSB
10231 	"mouse_jsbterm",
10232 # endif
10233 # ifdef FEAT_MOUSE_NET
10234 	"mouse_netterm",
10235 # endif
10236 # ifdef FEAT_MOUSE_PTERM
10237 	"mouse_pterm",
10238 # endif
10239 # ifdef FEAT_MOUSE_XTERM
10240 	"mouse_xterm",
10241 # endif
10242 #endif
10243 #ifdef FEAT_MBYTE
10244 	"multi_byte",
10245 #endif
10246 #ifdef FEAT_MBYTE_IME
10247 	"multi_byte_ime",
10248 #endif
10249 #ifdef FEAT_MULTI_LANG
10250 	"multi_lang",
10251 #endif
10252 #ifdef FEAT_MZSCHEME
10253 #ifndef DYNAMIC_MZSCHEME
10254 	"mzscheme",
10255 #endif
10256 #endif
10257 #ifdef FEAT_OLE
10258 	"ole",
10259 #endif
10260 #ifdef FEAT_OSFILETYPE
10261 	"osfiletype",
10262 #endif
10263 #ifdef FEAT_PATH_EXTRA
10264 	"path_extra",
10265 #endif
10266 #ifdef FEAT_PERL
10267 #ifndef DYNAMIC_PERL
10268 	"perl",
10269 #endif
10270 #endif
10271 #ifdef FEAT_PYTHON
10272 #ifndef DYNAMIC_PYTHON
10273 	"python",
10274 #endif
10275 #endif
10276 #ifdef FEAT_POSTSCRIPT
10277 	"postscript",
10278 #endif
10279 #ifdef FEAT_PRINTER
10280 	"printer",
10281 #endif
10282 #ifdef FEAT_PROFILE
10283 	"profile",
10284 #endif
10285 #ifdef FEAT_QUICKFIX
10286 	"quickfix",
10287 #endif
10288 #ifdef FEAT_RIGHTLEFT
10289 	"rightleft",
10290 #endif
10291 #if defined(FEAT_RUBY) && !defined(DYNAMIC_RUBY)
10292 	"ruby",
10293 #endif
10294 #ifdef FEAT_SCROLLBIND
10295 	"scrollbind",
10296 #endif
10297 #ifdef FEAT_CMDL_INFO
10298 	"showcmd",
10299 	"cmdline_info",
10300 #endif
10301 #ifdef FEAT_SIGNS
10302 	"signs",
10303 #endif
10304 #ifdef FEAT_SMARTINDENT
10305 	"smartindent",
10306 #endif
10307 #ifdef FEAT_SNIFF
10308 	"sniff",
10309 #endif
10310 #ifdef FEAT_STL_OPT
10311 	"statusline",
10312 #endif
10313 #ifdef FEAT_SUN_WORKSHOP
10314 	"sun_workshop",
10315 #endif
10316 #ifdef FEAT_NETBEANS_INTG
10317 	"netbeans_intg",
10318 #endif
10319 #ifdef FEAT_SYN_HL
10320 	"spell",
10321 #endif
10322 #ifdef FEAT_SYN_HL
10323 	"syntax",
10324 #endif
10325 #if defined(USE_SYSTEM) || !defined(UNIX)
10326 	"system",
10327 #endif
10328 #ifdef FEAT_TAG_BINS
10329 	"tag_binary",
10330 #endif
10331 #ifdef FEAT_TAG_OLDSTATIC
10332 	"tag_old_static",
10333 #endif
10334 #ifdef FEAT_TAG_ANYWHITE
10335 	"tag_any_white",
10336 #endif
10337 #ifdef FEAT_TCL
10338 # ifndef DYNAMIC_TCL
10339 	"tcl",
10340 # endif
10341 #endif
10342 #ifdef TERMINFO
10343 	"terminfo",
10344 #endif
10345 #ifdef FEAT_TERMRESPONSE
10346 	"termresponse",
10347 #endif
10348 #ifdef FEAT_TEXTOBJ
10349 	"textobjects",
10350 #endif
10351 #ifdef HAVE_TGETENT
10352 	"tgetent",
10353 #endif
10354 #ifdef FEAT_TITLE
10355 	"title",
10356 #endif
10357 #ifdef FEAT_TOOLBAR
10358 	"toolbar",
10359 #endif
10360 #ifdef FEAT_USR_CMDS
10361 	"user-commands",    /* was accidentally included in 5.4 */
10362 	"user_commands",
10363 #endif
10364 #ifdef FEAT_VIMINFO
10365 	"viminfo",
10366 #endif
10367 #ifdef FEAT_VERTSPLIT
10368 	"vertsplit",
10369 #endif
10370 #ifdef FEAT_VIRTUALEDIT
10371 	"virtualedit",
10372 #endif
10373 #ifdef FEAT_VISUAL
10374 	"visual",
10375 #endif
10376 #ifdef FEAT_VISUALEXTRA
10377 	"visualextra",
10378 #endif
10379 #ifdef FEAT_VREPLACE
10380 	"vreplace",
10381 #endif
10382 #ifdef FEAT_WILDIGN
10383 	"wildignore",
10384 #endif
10385 #ifdef FEAT_WILDMENU
10386 	"wildmenu",
10387 #endif
10388 #ifdef FEAT_WINDOWS
10389 	"windows",
10390 #endif
10391 #ifdef FEAT_WAK
10392 	"winaltkeys",
10393 #endif
10394 #ifdef FEAT_WRITEBACKUP
10395 	"writebackup",
10396 #endif
10397 #ifdef FEAT_XIM
10398 	"xim",
10399 #endif
10400 #ifdef FEAT_XFONTSET
10401 	"xfontset",
10402 #endif
10403 #ifdef USE_XSMP
10404 	"xsmp",
10405 #endif
10406 #ifdef USE_XSMP_INTERACT
10407 	"xsmp_interact",
10408 #endif
10409 #ifdef FEAT_XCLIPBOARD
10410 	"xterm_clipboard",
10411 #endif
10412 #ifdef FEAT_XTERM_SAVE
10413 	"xterm_save",
10414 #endif
10415 #if defined(UNIX) && defined(FEAT_X11)
10416 	"X11",
10417 #endif
10418 	NULL
10419     };
10420 
10421     name = get_tv_string(&argvars[0]);
10422     for (i = 0; has_list[i] != NULL; ++i)
10423 	if (STRICMP(name, has_list[i]) == 0)
10424 	{
10425 	    n = TRUE;
10426 	    break;
10427 	}
10428 
10429     if (n == FALSE)
10430     {
10431 	if (STRNICMP(name, "patch", 5) == 0)
10432 	    n = has_patch(atoi((char *)name + 5));
10433 	else if (STRICMP(name, "vim_starting") == 0)
10434 	    n = (starting != 0);
10435 #if defined(FEAT_BEVAL) && defined(FEAT_GUI_W32)
10436 	else if (STRICMP(name, "balloon_multiline") == 0)
10437 	    n = multiline_balloon_available();
10438 #endif
10439 #ifdef DYNAMIC_TCL
10440 	else if (STRICMP(name, "tcl") == 0)
10441 	    n = tcl_enabled(FALSE);
10442 #endif
10443 #if defined(USE_ICONV) && defined(DYNAMIC_ICONV)
10444 	else if (STRICMP(name, "iconv") == 0)
10445 	    n = iconv_enabled(FALSE);
10446 #endif
10447 #ifdef DYNAMIC_MZSCHEME
10448 	else if (STRICMP(name, "mzscheme") == 0)
10449 	    n = mzscheme_enabled(FALSE);
10450 #endif
10451 #ifdef DYNAMIC_RUBY
10452 	else if (STRICMP(name, "ruby") == 0)
10453 	    n = ruby_enabled(FALSE);
10454 #endif
10455 #ifdef DYNAMIC_PYTHON
10456 	else if (STRICMP(name, "python") == 0)
10457 	    n = python_enabled(FALSE);
10458 #endif
10459 #ifdef DYNAMIC_PERL
10460 	else if (STRICMP(name, "perl") == 0)
10461 	    n = perl_enabled(FALSE);
10462 #endif
10463 #ifdef FEAT_GUI
10464 	else if (STRICMP(name, "gui_running") == 0)
10465 	    n = (gui.in_use || gui.starting);
10466 # ifdef FEAT_GUI_W32
10467 	else if (STRICMP(name, "gui_win32s") == 0)
10468 	    n = gui_is_win32s();
10469 # endif
10470 # ifdef FEAT_BROWSE
10471 	else if (STRICMP(name, "browse") == 0)
10472 	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
10473 # endif
10474 #endif
10475 #ifdef FEAT_SYN_HL
10476 	else if (STRICMP(name, "syntax_items") == 0)
10477 	    n = syntax_present(curbuf);
10478 #endif
10479 #if defined(WIN3264)
10480 	else if (STRICMP(name, "win95") == 0)
10481 	    n = mch_windows95();
10482 #endif
10483 #ifdef FEAT_NETBEANS_INTG
10484 	else if (STRICMP(name, "netbeans_enabled") == 0)
10485 	    n = usingNetbeans;
10486 #endif
10487     }
10488 
10489     rettv->vval.v_number = n;
10490 }
10491 
10492 /*
10493  * "has_key()" function
10494  */
10495     static void
10496 f_has_key(argvars, rettv)
10497     typval_T	*argvars;
10498     typval_T	*rettv;
10499 {
10500     rettv->vval.v_number = 0;
10501     if (argvars[0].v_type != VAR_DICT)
10502     {
10503 	EMSG(_(e_dictreq));
10504 	return;
10505     }
10506     if (argvars[0].vval.v_dict == NULL)
10507 	return;
10508 
10509     rettv->vval.v_number = dict_find(argvars[0].vval.v_dict,
10510 				      get_tv_string(&argvars[1]), -1) != NULL;
10511 }
10512 
10513 /*
10514  * "hasmapto()" function
10515  */
10516     static void
10517 f_hasmapto(argvars, rettv)
10518     typval_T	*argvars;
10519     typval_T	*rettv;
10520 {
10521     char_u	*name;
10522     char_u	*mode;
10523     char_u	buf[NUMBUFLEN];
10524 
10525     name = get_tv_string(&argvars[0]);
10526     if (argvars[1].v_type == VAR_UNKNOWN)
10527 	mode = (char_u *)"nvo";
10528     else
10529 	mode = get_tv_string_buf(&argvars[1], buf);
10530 
10531     if (map_to_exists(name, mode))
10532 	rettv->vval.v_number = TRUE;
10533     else
10534 	rettv->vval.v_number = FALSE;
10535 }
10536 
10537 /*
10538  * "histadd()" function
10539  */
10540 /*ARGSUSED*/
10541     static void
10542 f_histadd(argvars, rettv)
10543     typval_T	*argvars;
10544     typval_T	*rettv;
10545 {
10546 #ifdef FEAT_CMDHIST
10547     int		histype;
10548     char_u	*str;
10549     char_u	buf[NUMBUFLEN];
10550 #endif
10551 
10552     rettv->vval.v_number = FALSE;
10553     if (check_restricted() || check_secure())
10554 	return;
10555 #ifdef FEAT_CMDHIST
10556     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10557     histype = str != NULL ? get_histtype(str) : -1;
10558     if (histype >= 0)
10559     {
10560 	str = get_tv_string_buf(&argvars[1], buf);
10561 	if (*str != NUL)
10562 	{
10563 	    add_to_history(histype, str, FALSE, NUL);
10564 	    rettv->vval.v_number = TRUE;
10565 	    return;
10566 	}
10567     }
10568 #endif
10569 }
10570 
10571 /*
10572  * "histdel()" function
10573  */
10574 /*ARGSUSED*/
10575     static void
10576 f_histdel(argvars, rettv)
10577     typval_T	*argvars;
10578     typval_T	*rettv;
10579 {
10580 #ifdef FEAT_CMDHIST
10581     int		n;
10582     char_u	buf[NUMBUFLEN];
10583     char_u	*str;
10584 
10585     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10586     if (str == NULL)
10587 	n = 0;
10588     else if (argvars[1].v_type == VAR_UNKNOWN)
10589 	/* only one argument: clear entire history */
10590 	n = clr_history(get_histtype(str));
10591     else if (argvars[1].v_type == VAR_NUMBER)
10592 	/* index given: remove that entry */
10593 	n = del_history_idx(get_histtype(str),
10594 					  (int)get_tv_number(&argvars[1]));
10595     else
10596 	/* string given: remove all matching entries */
10597 	n = del_history_entry(get_histtype(str),
10598 				      get_tv_string_buf(&argvars[1], buf));
10599     rettv->vval.v_number = n;
10600 #else
10601     rettv->vval.v_number = 0;
10602 #endif
10603 }
10604 
10605 /*
10606  * "histget()" function
10607  */
10608 /*ARGSUSED*/
10609     static void
10610 f_histget(argvars, rettv)
10611     typval_T	*argvars;
10612     typval_T	*rettv;
10613 {
10614 #ifdef FEAT_CMDHIST
10615     int		type;
10616     int		idx;
10617     char_u	*str;
10618 
10619     str = get_tv_string_chk(&argvars[0]);	/* NULL on type error */
10620     if (str == NULL)
10621 	rettv->vval.v_string = NULL;
10622     else
10623     {
10624 	type = get_histtype(str);
10625 	if (argvars[1].v_type == VAR_UNKNOWN)
10626 	    idx = get_history_idx(type);
10627 	else
10628 	    idx = (int)get_tv_number_chk(&argvars[1], NULL);
10629 						    /* -1 on type error */
10630 	rettv->vval.v_string = vim_strsave(get_history_entry(type, idx));
10631     }
10632 #else
10633     rettv->vval.v_string = NULL;
10634 #endif
10635     rettv->v_type = VAR_STRING;
10636 }
10637 
10638 /*
10639  * "histnr()" function
10640  */
10641 /*ARGSUSED*/
10642     static void
10643 f_histnr(argvars, rettv)
10644     typval_T	*argvars;
10645     typval_T	*rettv;
10646 {
10647     int		i;
10648 
10649 #ifdef FEAT_CMDHIST
10650     char_u	*history = get_tv_string_chk(&argvars[0]);
10651 
10652     i = history == NULL ? HIST_CMD - 1 : get_histtype(history);
10653     if (i >= HIST_CMD && i < HIST_COUNT)
10654 	i = get_history_idx(i);
10655     else
10656 #endif
10657 	i = -1;
10658     rettv->vval.v_number = i;
10659 }
10660 
10661 /*
10662  * "highlightID(name)" function
10663  */
10664     static void
10665 f_hlID(argvars, rettv)
10666     typval_T	*argvars;
10667     typval_T	*rettv;
10668 {
10669     rettv->vval.v_number = syn_name2id(get_tv_string(&argvars[0]));
10670 }
10671 
10672 /*
10673  * "highlight_exists()" function
10674  */
10675     static void
10676 f_hlexists(argvars, rettv)
10677     typval_T	*argvars;
10678     typval_T	*rettv;
10679 {
10680     rettv->vval.v_number = highlight_exists(get_tv_string(&argvars[0]));
10681 }
10682 
10683 /*
10684  * "hostname()" function
10685  */
10686 /*ARGSUSED*/
10687     static void
10688 f_hostname(argvars, rettv)
10689     typval_T	*argvars;
10690     typval_T	*rettv;
10691 {
10692     char_u hostname[256];
10693 
10694     mch_get_host_name(hostname, 256);
10695     rettv->v_type = VAR_STRING;
10696     rettv->vval.v_string = vim_strsave(hostname);
10697 }
10698 
10699 /*
10700  * iconv() function
10701  */
10702 /*ARGSUSED*/
10703     static void
10704 f_iconv(argvars, rettv)
10705     typval_T	*argvars;
10706     typval_T	*rettv;
10707 {
10708 #ifdef FEAT_MBYTE
10709     char_u	buf1[NUMBUFLEN];
10710     char_u	buf2[NUMBUFLEN];
10711     char_u	*from, *to, *str;
10712     vimconv_T	vimconv;
10713 #endif
10714 
10715     rettv->v_type = VAR_STRING;
10716     rettv->vval.v_string = NULL;
10717 
10718 #ifdef FEAT_MBYTE
10719     str = get_tv_string(&argvars[0]);
10720     from = enc_canonize(enc_skip(get_tv_string_buf(&argvars[1], buf1)));
10721     to = enc_canonize(enc_skip(get_tv_string_buf(&argvars[2], buf2)));
10722     vimconv.vc_type = CONV_NONE;
10723     convert_setup(&vimconv, from, to);
10724 
10725     /* If the encodings are equal, no conversion needed. */
10726     if (vimconv.vc_type == CONV_NONE)
10727 	rettv->vval.v_string = vim_strsave(str);
10728     else
10729 	rettv->vval.v_string = string_convert(&vimconv, str, NULL);
10730 
10731     convert_setup(&vimconv, NULL, NULL);
10732     vim_free(from);
10733     vim_free(to);
10734 #endif
10735 }
10736 
10737 /*
10738  * "indent()" function
10739  */
10740     static void
10741 f_indent(argvars, rettv)
10742     typval_T	*argvars;
10743     typval_T	*rettv;
10744 {
10745     linenr_T	lnum;
10746 
10747     lnum = get_tv_lnum(argvars);
10748     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
10749 	rettv->vval.v_number = get_indent_lnum(lnum);
10750     else
10751 	rettv->vval.v_number = -1;
10752 }
10753 
10754 /*
10755  * "index()" function
10756  */
10757     static void
10758 f_index(argvars, rettv)
10759     typval_T	*argvars;
10760     typval_T	*rettv;
10761 {
10762     list_T	*l;
10763     listitem_T	*item;
10764     long	idx = 0;
10765     int		ic = FALSE;
10766 
10767     rettv->vval.v_number = -1;
10768     if (argvars[0].v_type != VAR_LIST)
10769     {
10770 	EMSG(_(e_listreq));
10771 	return;
10772     }
10773     l = argvars[0].vval.v_list;
10774     if (l != NULL)
10775     {
10776 	item = l->lv_first;
10777 	if (argvars[2].v_type != VAR_UNKNOWN)
10778 	{
10779 	    int		error = FALSE;
10780 
10781 	    /* Start at specified item.  Use the cached index that list_find()
10782 	     * sets, so that a negative number also works. */
10783 	    item = list_find(l, get_tv_number_chk(&argvars[2], &error));
10784 	    idx = l->lv_idx;
10785 	    if (argvars[3].v_type != VAR_UNKNOWN)
10786 		ic = get_tv_number_chk(&argvars[3], &error);
10787 	    if (error)
10788 		item = NULL;
10789 	}
10790 
10791 	for ( ; item != NULL; item = item->li_next, ++idx)
10792 	    if (tv_equal(&item->li_tv, &argvars[1], ic))
10793 	    {
10794 		rettv->vval.v_number = idx;
10795 		break;
10796 	    }
10797     }
10798 }
10799 
10800 static int inputsecret_flag = 0;
10801 
10802 /*
10803  * "input()" function
10804  *     Also handles inputsecret() when inputsecret is set.
10805  */
10806     static void
10807 f_input(argvars, rettv)
10808     typval_T	*argvars;
10809     typval_T	*rettv;
10810 {
10811     char_u	*prompt = get_tv_string_chk(&argvars[0]);
10812     char_u	*p = NULL;
10813     int		c;
10814     char_u	buf[NUMBUFLEN];
10815     int		cmd_silent_save = cmd_silent;
10816     char_u	*defstr = (char_u *)"";
10817     int		xp_type = EXPAND_NOTHING;
10818     char_u	*xp_arg = NULL;
10819 
10820     rettv->v_type = VAR_STRING;
10821 
10822 #ifdef NO_CONSOLE_INPUT
10823     /* While starting up, there is no place to enter text. */
10824     if (no_console_input())
10825     {
10826 	rettv->vval.v_string = NULL;
10827 	return;
10828     }
10829 #endif
10830 
10831     cmd_silent = FALSE;		/* Want to see the prompt. */
10832     if (prompt != NULL)
10833     {
10834 	/* Only the part of the message after the last NL is considered as
10835 	 * prompt for the command line */
10836 	p = vim_strrchr(prompt, '\n');
10837 	if (p == NULL)
10838 	    p = prompt;
10839 	else
10840 	{
10841 	    ++p;
10842 	    c = *p;
10843 	    *p = NUL;
10844 	    msg_start();
10845 	    msg_clr_eos();
10846 	    msg_puts_attr(prompt, echo_attr);
10847 	    msg_didout = FALSE;
10848 	    msg_starthere();
10849 	    *p = c;
10850 	}
10851 	cmdline_row = msg_row;
10852 
10853 	if (argvars[1].v_type != VAR_UNKNOWN)
10854 	{
10855 	    defstr = get_tv_string_buf_chk(&argvars[1], buf);
10856 	    if (defstr != NULL)
10857 		stuffReadbuffSpec(defstr);
10858 	}
10859 
10860 	if (argvars[2].v_type != VAR_UNKNOWN)
10861 	{
10862 	    char_u	*xp_name;
10863 	    int		xp_namelen;
10864 	    long	argt;
10865 
10866 	    rettv->vval.v_string = NULL;
10867 
10868 	    xp_name = get_tv_string_buf_chk(&argvars[2], buf);
10869 	    if (xp_name == NULL)
10870 		return;
10871 
10872 	    xp_namelen = STRLEN(xp_name);
10873 
10874 	    if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt, &xp_arg)
10875 								      == FAIL)
10876 		return;
10877 	}
10878 
10879 	if (defstr != NULL)
10880 	    rettv->vval.v_string =
10881 		getcmdline_prompt(inputsecret_flag ? NUL : '@', p, echo_attr,
10882 				  xp_type, xp_arg);
10883 
10884 	vim_free(xp_arg);
10885 
10886 	/* since the user typed this, no need to wait for return */
10887 	need_wait_return = FALSE;
10888 	msg_didout = FALSE;
10889     }
10890     cmd_silent = cmd_silent_save;
10891 }
10892 
10893 /*
10894  * "inputdialog()" function
10895  */
10896     static void
10897 f_inputdialog(argvars, rettv)
10898     typval_T	*argvars;
10899     typval_T	*rettv;
10900 {
10901 #if defined(FEAT_GUI_TEXTDIALOG)
10902     /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
10903     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
10904     {
10905 	char_u	*message;
10906 	char_u	buf[NUMBUFLEN];
10907 	char_u	*defstr = (char_u *)"";
10908 
10909 	message = get_tv_string_chk(&argvars[0]);
10910 	if (argvars[1].v_type != VAR_UNKNOWN
10911 	    && (defstr = get_tv_string_buf_chk(&argvars[1], buf)) != NULL)
10912 	    vim_strncpy(IObuff, defstr, IOSIZE - 1);
10913 	else
10914 	    IObuff[0] = NUL;
10915 	if (message != NULL && defstr != NULL
10916 		&& do_dialog(VIM_QUESTION, NULL, message,
10917 				(char_u *)_("&OK\n&Cancel"), 1, IObuff) == 1)
10918 	    rettv->vval.v_string = vim_strsave(IObuff);
10919 	else
10920 	{
10921 	    if (message != NULL && defstr != NULL
10922 					&& argvars[1].v_type != VAR_UNKNOWN
10923 					&& argvars[2].v_type != VAR_UNKNOWN)
10924 		rettv->vval.v_string = vim_strsave(
10925 				      get_tv_string_buf(&argvars[2], buf));
10926 	    else
10927 		rettv->vval.v_string = NULL;
10928 	}
10929 	rettv->v_type = VAR_STRING;
10930     }
10931     else
10932 #endif
10933 	f_input(argvars, rettv);
10934 }
10935 
10936 /*
10937  * "inputlist()" function
10938  */
10939     static void
10940 f_inputlist(argvars, rettv)
10941     typval_T	*argvars;
10942     typval_T	*rettv;
10943 {
10944     listitem_T	*li;
10945     int		selected;
10946     int		mouse_used;
10947 
10948     rettv->vval.v_number = 0;
10949 #ifdef NO_CONSOLE_INPUT
10950     /* While starting up, there is no place to enter text. */
10951     if (no_console_input())
10952 	return;
10953 #endif
10954     if (argvars[0].v_type != VAR_LIST || argvars[0].vval.v_list == NULL)
10955     {
10956 	EMSG2(_(e_listarg), "inputlist()");
10957 	return;
10958     }
10959 
10960     msg_start();
10961     lines_left = Rows;	/* avoid more prompt */
10962     msg_scroll = TRUE;
10963     msg_clr_eos();
10964 
10965     for (li = argvars[0].vval.v_list->lv_first; li != NULL; li = li->li_next)
10966     {
10967 	msg_puts(get_tv_string(&li->li_tv));
10968 	msg_putchar('\n');
10969     }
10970 
10971     /* Ask for choice. */
10972     selected = prompt_for_number(&mouse_used);
10973     if (mouse_used)
10974 	selected -= lines_left;
10975 
10976     rettv->vval.v_number = selected;
10977 }
10978 
10979 
10980 static garray_T	    ga_userinput = {0, 0, sizeof(tasave_T), 4, NULL};
10981 
10982 /*
10983  * "inputrestore()" function
10984  */
10985 /*ARGSUSED*/
10986     static void
10987 f_inputrestore(argvars, rettv)
10988     typval_T	*argvars;
10989     typval_T	*rettv;
10990 {
10991     if (ga_userinput.ga_len > 0)
10992     {
10993 	--ga_userinput.ga_len;
10994 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
10995 						       + ga_userinput.ga_len);
10996 	rettv->vval.v_number = 0; /* OK */
10997     }
10998     else if (p_verbose > 1)
10999     {
11000 	verb_msg((char_u *)_("called inputrestore() more often than inputsave()"));
11001 	rettv->vval.v_number = 1; /* Failed */
11002     }
11003 }
11004 
11005 /*
11006  * "inputsave()" function
11007  */
11008 /*ARGSUSED*/
11009     static void
11010 f_inputsave(argvars, rettv)
11011     typval_T	*argvars;
11012     typval_T	*rettv;
11013 {
11014     /* Add an entry to the stack of typehead storage. */
11015     if (ga_grow(&ga_userinput, 1) == OK)
11016     {
11017 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
11018 						       + ga_userinput.ga_len);
11019 	++ga_userinput.ga_len;
11020 	rettv->vval.v_number = 0; /* OK */
11021     }
11022     else
11023 	rettv->vval.v_number = 1; /* Failed */
11024 }
11025 
11026 /*
11027  * "inputsecret()" function
11028  */
11029     static void
11030 f_inputsecret(argvars, rettv)
11031     typval_T	*argvars;
11032     typval_T	*rettv;
11033 {
11034     ++cmdline_star;
11035     ++inputsecret_flag;
11036     f_input(argvars, rettv);
11037     --cmdline_star;
11038     --inputsecret_flag;
11039 }
11040 
11041 /*
11042  * "insert()" function
11043  */
11044     static void
11045 f_insert(argvars, rettv)
11046     typval_T	*argvars;
11047     typval_T	*rettv;
11048 {
11049     long	before = 0;
11050     listitem_T	*item;
11051     list_T	*l;
11052     int		error = FALSE;
11053 
11054     rettv->vval.v_number = 0;
11055     if (argvars[0].v_type != VAR_LIST)
11056 	EMSG2(_(e_listarg), "insert()");
11057     else if ((l = argvars[0].vval.v_list) != NULL
11058 	    && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
11059     {
11060 	if (argvars[2].v_type != VAR_UNKNOWN)
11061 	    before = get_tv_number_chk(&argvars[2], &error);
11062 	if (error)
11063 	    return;		/* type error; errmsg already given */
11064 
11065 	if (before == l->lv_len)
11066 	    item = NULL;
11067 	else
11068 	{
11069 	    item = list_find(l, before);
11070 	    if (item == NULL)
11071 	    {
11072 		EMSGN(_(e_listidx), before);
11073 		l = NULL;
11074 	    }
11075 	}
11076 	if (l != NULL)
11077 	{
11078 	    list_insert_tv(l, &argvars[1], item);
11079 	    copy_tv(&argvars[0], rettv);
11080 	}
11081     }
11082 }
11083 
11084 /*
11085  * "isdirectory()" function
11086  */
11087     static void
11088 f_isdirectory(argvars, rettv)
11089     typval_T	*argvars;
11090     typval_T	*rettv;
11091 {
11092     rettv->vval.v_number = mch_isdir(get_tv_string(&argvars[0]));
11093 }
11094 
11095 /*
11096  * "islocked()" function
11097  */
11098     static void
11099 f_islocked(argvars, rettv)
11100     typval_T	*argvars;
11101     typval_T	*rettv;
11102 {
11103     lval_T	lv;
11104     char_u	*end;
11105     dictitem_T	*di;
11106 
11107     rettv->vval.v_number = -1;
11108     end = get_lval(get_tv_string(&argvars[0]), NULL, &lv, FALSE, FALSE, FALSE,
11109 							     FNE_CHECK_START);
11110     if (end != NULL && lv.ll_name != NULL)
11111     {
11112 	if (*end != NUL)
11113 	    EMSG(_(e_trailing));
11114 	else
11115 	{
11116 	    if (lv.ll_tv == NULL)
11117 	    {
11118 		if (check_changedtick(lv.ll_name))
11119 		    rettv->vval.v_number = 1;	    /* always locked */
11120 		else
11121 		{
11122 		    di = find_var(lv.ll_name, NULL);
11123 		    if (di != NULL)
11124 		    {
11125 			/* Consider a variable locked when:
11126 			 * 1. the variable itself is locked
11127 			 * 2. the value of the variable is locked.
11128 			 * 3. the List or Dict value is locked.
11129 			 */
11130 			rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
11131 						  || tv_islocked(&di->di_tv));
11132 		    }
11133 		}
11134 	    }
11135 	    else if (lv.ll_range)
11136 		EMSG(_("E745: Range not allowed"));
11137 	    else if (lv.ll_newkey != NULL)
11138 		EMSG2(_(e_dictkey), lv.ll_newkey);
11139 	    else if (lv.ll_list != NULL)
11140 		/* List item. */
11141 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
11142 	    else
11143 		/* Dictionary item. */
11144 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
11145 	}
11146     }
11147 
11148     clear_lval(&lv);
11149 }
11150 
11151 static void dict_list __ARGS((typval_T *argvars, typval_T *rettv, int what));
11152 
11153 /*
11154  * Turn a dict into a list:
11155  * "what" == 0: list of keys
11156  * "what" == 1: list of values
11157  * "what" == 2: list of items
11158  */
11159     static void
11160 dict_list(argvars, rettv, what)
11161     typval_T	*argvars;
11162     typval_T	*rettv;
11163     int		what;
11164 {
11165     list_T	*l;
11166     list_T	*l2;
11167     dictitem_T	*di;
11168     hashitem_T	*hi;
11169     listitem_T	*li;
11170     listitem_T	*li2;
11171     dict_T	*d;
11172     int		todo;
11173 
11174     rettv->vval.v_number = 0;
11175     if (argvars[0].v_type != VAR_DICT)
11176     {
11177 	EMSG(_(e_dictreq));
11178 	return;
11179     }
11180     if ((d = argvars[0].vval.v_dict) == NULL)
11181 	return;
11182 
11183     l = list_alloc();
11184     if (l == NULL)
11185 	return;
11186     rettv->v_type = VAR_LIST;
11187     rettv->vval.v_list = l;
11188     ++l->lv_refcount;
11189 
11190     todo = d->dv_hashtab.ht_used;
11191     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11192     {
11193 	if (!HASHITEM_EMPTY(hi))
11194 	{
11195 	    --todo;
11196 	    di = HI2DI(hi);
11197 
11198 	    li = listitem_alloc();
11199 	    if (li == NULL)
11200 		break;
11201 	    list_append(l, li);
11202 
11203 	    if (what == 0)
11204 	    {
11205 		/* keys() */
11206 		li->li_tv.v_type = VAR_STRING;
11207 		li->li_tv.v_lock = 0;
11208 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
11209 	    }
11210 	    else if (what == 1)
11211 	    {
11212 		/* values() */
11213 		copy_tv(&di->di_tv, &li->li_tv);
11214 	    }
11215 	    else
11216 	    {
11217 		/* items() */
11218 		l2 = list_alloc();
11219 		li->li_tv.v_type = VAR_LIST;
11220 		li->li_tv.v_lock = 0;
11221 		li->li_tv.vval.v_list = l2;
11222 		if (l2 == NULL)
11223 		    break;
11224 		++l2->lv_refcount;
11225 
11226 		li2 = listitem_alloc();
11227 		if (li2 == NULL)
11228 		    break;
11229 		list_append(l2, li2);
11230 		li2->li_tv.v_type = VAR_STRING;
11231 		li2->li_tv.v_lock = 0;
11232 		li2->li_tv.vval.v_string = vim_strsave(di->di_key);
11233 
11234 		li2 = listitem_alloc();
11235 		if (li2 == NULL)
11236 		    break;
11237 		list_append(l2, li2);
11238 		copy_tv(&di->di_tv, &li2->li_tv);
11239 	    }
11240 	}
11241     }
11242 }
11243 
11244 /*
11245  * "items(dict)" function
11246  */
11247     static void
11248 f_items(argvars, rettv)
11249     typval_T	*argvars;
11250     typval_T	*rettv;
11251 {
11252     dict_list(argvars, rettv, 2);
11253 }
11254 
11255 /*
11256  * "join()" function
11257  */
11258     static void
11259 f_join(argvars, rettv)
11260     typval_T	*argvars;
11261     typval_T	*rettv;
11262 {
11263     garray_T	ga;
11264     char_u	*sep;
11265 
11266     rettv->vval.v_number = 0;
11267     if (argvars[0].v_type != VAR_LIST)
11268     {
11269 	EMSG(_(e_listreq));
11270 	return;
11271     }
11272     if (argvars[0].vval.v_list == NULL)
11273 	return;
11274     if (argvars[1].v_type == VAR_UNKNOWN)
11275 	sep = (char_u *)" ";
11276     else
11277 	sep = get_tv_string_chk(&argvars[1]);
11278 
11279     rettv->v_type = VAR_STRING;
11280 
11281     if (sep != NULL)
11282     {
11283 	ga_init2(&ga, (int)sizeof(char), 80);
11284 	list_join(&ga, argvars[0].vval.v_list, sep, TRUE);
11285 	ga_append(&ga, NUL);
11286 	rettv->vval.v_string = (char_u *)ga.ga_data;
11287     }
11288     else
11289 	rettv->vval.v_string = NULL;
11290 }
11291 
11292 /*
11293  * "keys()" function
11294  */
11295     static void
11296 f_keys(argvars, rettv)
11297     typval_T	*argvars;
11298     typval_T	*rettv;
11299 {
11300     dict_list(argvars, rettv, 0);
11301 }
11302 
11303 /*
11304  * "last_buffer_nr()" function.
11305  */
11306 /*ARGSUSED*/
11307     static void
11308 f_last_buffer_nr(argvars, rettv)
11309     typval_T	*argvars;
11310     typval_T	*rettv;
11311 {
11312     int		n = 0;
11313     buf_T	*buf;
11314 
11315     for (buf = firstbuf; buf != NULL; buf = buf->b_next)
11316 	if (n < buf->b_fnum)
11317 	    n = buf->b_fnum;
11318 
11319     rettv->vval.v_number = n;
11320 }
11321 
11322 /*
11323  * "len()" function
11324  */
11325     static void
11326 f_len(argvars, rettv)
11327     typval_T	*argvars;
11328     typval_T	*rettv;
11329 {
11330     switch (argvars[0].v_type)
11331     {
11332 	case VAR_STRING:
11333 	case VAR_NUMBER:
11334 	    rettv->vval.v_number = (varnumber_T)STRLEN(
11335 					       get_tv_string(&argvars[0]));
11336 	    break;
11337 	case VAR_LIST:
11338 	    rettv->vval.v_number = list_len(argvars[0].vval.v_list);
11339 	    break;
11340 	case VAR_DICT:
11341 	    rettv->vval.v_number = dict_len(argvars[0].vval.v_dict);
11342 	    break;
11343 	default:
11344 	    EMSG(_("E701: Invalid type for len()"));
11345 	    break;
11346     }
11347 }
11348 
11349 static void libcall_common __ARGS((typval_T *argvars, typval_T *rettv, int type));
11350 
11351     static void
11352 libcall_common(argvars, rettv, type)
11353     typval_T	*argvars;
11354     typval_T	*rettv;
11355     int		type;
11356 {
11357 #ifdef FEAT_LIBCALL
11358     char_u		*string_in;
11359     char_u		**string_result;
11360     int			nr_result;
11361 #endif
11362 
11363     rettv->v_type = type;
11364     if (type == VAR_NUMBER)
11365 	rettv->vval.v_number = 0;
11366     else
11367 	rettv->vval.v_string = NULL;
11368 
11369     if (check_restricted() || check_secure())
11370 	return;
11371 
11372 #ifdef FEAT_LIBCALL
11373     /* The first two args must be strings, otherwise its meaningless */
11374     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
11375     {
11376 	string_in = NULL;
11377 	if (argvars[2].v_type == VAR_STRING)
11378 	    string_in = argvars[2].vval.v_string;
11379 	if (type == VAR_NUMBER)
11380 	    string_result = NULL;
11381 	else
11382 	    string_result = &rettv->vval.v_string;
11383 	if (mch_libcall(argvars[0].vval.v_string,
11384 			     argvars[1].vval.v_string,
11385 			     string_in,
11386 			     argvars[2].vval.v_number,
11387 			     string_result,
11388 			     &nr_result) == OK
11389 		&& type == VAR_NUMBER)
11390 	    rettv->vval.v_number = nr_result;
11391     }
11392 #endif
11393 }
11394 
11395 /*
11396  * "libcall()" function
11397  */
11398     static void
11399 f_libcall(argvars, rettv)
11400     typval_T	*argvars;
11401     typval_T	*rettv;
11402 {
11403     libcall_common(argvars, rettv, VAR_STRING);
11404 }
11405 
11406 /*
11407  * "libcallnr()" function
11408  */
11409     static void
11410 f_libcallnr(argvars, rettv)
11411     typval_T	*argvars;
11412     typval_T	*rettv;
11413 {
11414     libcall_common(argvars, rettv, VAR_NUMBER);
11415 }
11416 
11417 /*
11418  * "line(string)" function
11419  */
11420     static void
11421 f_line(argvars, rettv)
11422     typval_T	*argvars;
11423     typval_T	*rettv;
11424 {
11425     linenr_T	lnum = 0;
11426     pos_T	*fp;
11427 
11428     fp = var2fpos(&argvars[0], TRUE);
11429     if (fp != NULL)
11430 	lnum = fp->lnum;
11431     rettv->vval.v_number = lnum;
11432 }
11433 
11434 /*
11435  * "line2byte(lnum)" function
11436  */
11437 /*ARGSUSED*/
11438     static void
11439 f_line2byte(argvars, rettv)
11440     typval_T	*argvars;
11441     typval_T	*rettv;
11442 {
11443 #ifndef FEAT_BYTEOFF
11444     rettv->vval.v_number = -1;
11445 #else
11446     linenr_T	lnum;
11447 
11448     lnum = get_tv_lnum(argvars);
11449     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
11450 	rettv->vval.v_number = -1;
11451     else
11452 	rettv->vval.v_number = ml_find_line_or_offset(curbuf, lnum, NULL);
11453     if (rettv->vval.v_number >= 0)
11454 	++rettv->vval.v_number;
11455 #endif
11456 }
11457 
11458 /*
11459  * "lispindent(lnum)" function
11460  */
11461     static void
11462 f_lispindent(argvars, rettv)
11463     typval_T	*argvars;
11464     typval_T	*rettv;
11465 {
11466 #ifdef FEAT_LISP
11467     pos_T	pos;
11468     linenr_T	lnum;
11469 
11470     pos = curwin->w_cursor;
11471     lnum = get_tv_lnum(argvars);
11472     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count)
11473     {
11474 	curwin->w_cursor.lnum = lnum;
11475 	rettv->vval.v_number = get_lisp_indent();
11476 	curwin->w_cursor = pos;
11477     }
11478     else
11479 #endif
11480 	rettv->vval.v_number = -1;
11481 }
11482 
11483 /*
11484  * "localtime()" function
11485  */
11486 /*ARGSUSED*/
11487     static void
11488 f_localtime(argvars, rettv)
11489     typval_T	*argvars;
11490     typval_T	*rettv;
11491 {
11492     rettv->vval.v_number = (varnumber_T)time(NULL);
11493 }
11494 
11495 static void get_maparg __ARGS((typval_T *argvars, typval_T *rettv, int exact));
11496 
11497     static void
11498 get_maparg(argvars, rettv, exact)
11499     typval_T	*argvars;
11500     typval_T	*rettv;
11501     int		exact;
11502 {
11503     char_u	*keys;
11504     char_u	*which;
11505     char_u	buf[NUMBUFLEN];
11506     char_u	*keys_buf = NULL;
11507     char_u	*rhs;
11508     int		mode;
11509     garray_T	ga;
11510 
11511     /* return empty string for failure */
11512     rettv->v_type = VAR_STRING;
11513     rettv->vval.v_string = NULL;
11514 
11515     keys = get_tv_string(&argvars[0]);
11516     if (*keys == NUL)
11517 	return;
11518 
11519     if (argvars[1].v_type != VAR_UNKNOWN)
11520 	which = get_tv_string_buf_chk(&argvars[1], buf);
11521     else
11522 	which = (char_u *)"";
11523     if (which == NULL)
11524 	return;
11525 
11526     mode = get_map_mode(&which, 0);
11527 
11528     keys = replace_termcodes(keys, &keys_buf, TRUE, TRUE);
11529     rhs = check_map(keys, mode, exact, FALSE);
11530     vim_free(keys_buf);
11531     if (rhs != NULL)
11532     {
11533 	ga_init(&ga);
11534 	ga.ga_itemsize = 1;
11535 	ga.ga_growsize = 40;
11536 
11537 	while (*rhs != NUL)
11538 	    ga_concat(&ga, str2special(&rhs, FALSE));
11539 
11540 	ga_append(&ga, NUL);
11541 	rettv->vval.v_string = (char_u *)ga.ga_data;
11542     }
11543 }
11544 
11545 /*
11546  * "map()" function
11547  */
11548     static void
11549 f_map(argvars, rettv)
11550     typval_T	*argvars;
11551     typval_T	*rettv;
11552 {
11553     filter_map(argvars, rettv, TRUE);
11554 }
11555 
11556 /*
11557  * "maparg()" function
11558  */
11559     static void
11560 f_maparg(argvars, rettv)
11561     typval_T	*argvars;
11562     typval_T	*rettv;
11563 {
11564     get_maparg(argvars, rettv, TRUE);
11565 }
11566 
11567 /*
11568  * "mapcheck()" function
11569  */
11570     static void
11571 f_mapcheck(argvars, rettv)
11572     typval_T	*argvars;
11573     typval_T	*rettv;
11574 {
11575     get_maparg(argvars, rettv, FALSE);
11576 }
11577 
11578 static void find_some_match __ARGS((typval_T *argvars, typval_T *rettv, int start));
11579 
11580     static void
11581 find_some_match(argvars, rettv, type)
11582     typval_T	*argvars;
11583     typval_T	*rettv;
11584     int		type;
11585 {
11586     char_u	*str = NULL;
11587     char_u	*expr = NULL;
11588     char_u	*pat;
11589     regmatch_T	regmatch;
11590     char_u	patbuf[NUMBUFLEN];
11591     char_u	strbuf[NUMBUFLEN];
11592     char_u	*save_cpo;
11593     long	start = 0;
11594     long	nth = 1;
11595     int		match = 0;
11596     list_T	*l = NULL;
11597     listitem_T	*li = NULL;
11598     long	idx = 0;
11599     char_u	*tofree = NULL;
11600 
11601     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
11602     save_cpo = p_cpo;
11603     p_cpo = (char_u *)"";
11604 
11605     rettv->vval.v_number = -1;
11606     if (type == 3)
11607     {
11608 	/* return empty list when there are no matches */
11609 	if ((rettv->vval.v_list = list_alloc()) == NULL)
11610 	    goto theend;
11611 	rettv->v_type = VAR_LIST;
11612 	++rettv->vval.v_list->lv_refcount;
11613     }
11614     else if (type == 2)
11615     {
11616 	rettv->v_type = VAR_STRING;
11617 	rettv->vval.v_string = NULL;
11618     }
11619 
11620     if (argvars[0].v_type == VAR_LIST)
11621     {
11622 	if ((l = argvars[0].vval.v_list) == NULL)
11623 	    goto theend;
11624 	li = l->lv_first;
11625     }
11626     else
11627 	expr = str = get_tv_string(&argvars[0]);
11628 
11629     pat = get_tv_string_buf_chk(&argvars[1], patbuf);
11630     if (pat == NULL)
11631 	goto theend;
11632 
11633     if (argvars[2].v_type != VAR_UNKNOWN)
11634     {
11635 	int	    error = FALSE;
11636 
11637 	start = get_tv_number_chk(&argvars[2], &error);
11638 	if (error)
11639 	    goto theend;
11640 	if (l != NULL)
11641 	{
11642 	    li = list_find(l, start);
11643 	    if (li == NULL)
11644 		goto theend;
11645 	    idx = l->lv_idx;	/* use the cached index */
11646 	}
11647 	else
11648 	{
11649 	    if (start < 0)
11650 		start = 0;
11651 	    if (start > (long)STRLEN(str))
11652 		goto theend;
11653 	    str += start;
11654 	}
11655 
11656 	if (argvars[3].v_type != VAR_UNKNOWN)
11657 	    nth = get_tv_number_chk(&argvars[3], &error);
11658 	if (error)
11659 	    goto theend;
11660     }
11661 
11662     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
11663     if (regmatch.regprog != NULL)
11664     {
11665 	regmatch.rm_ic = p_ic;
11666 
11667 	for (;;)
11668 	{
11669 	    if (l != NULL)
11670 	    {
11671 		if (li == NULL)
11672 		{
11673 		    match = FALSE;
11674 		    break;
11675 		}
11676 		vim_free(tofree);
11677 		str = echo_string(&li->li_tv, &tofree, strbuf);
11678 		if (str == NULL)
11679 		    break;
11680 	    }
11681 
11682 	    match = vim_regexec_nl(&regmatch, str, (colnr_T)0);
11683 
11684 	    if (match && --nth <= 0)
11685 		break;
11686 	    if (l == NULL && !match)
11687 		break;
11688 
11689 	    /* Advance to just after the match. */
11690 	    if (l != NULL)
11691 	    {
11692 		li = li->li_next;
11693 		++idx;
11694 	    }
11695 	    else
11696 	    {
11697 #ifdef FEAT_MBYTE
11698 		str = regmatch.startp[0] + (*mb_ptr2len)(regmatch.startp[0]);
11699 #else
11700 		str = regmatch.startp[0] + 1;
11701 #endif
11702 	    }
11703 	}
11704 
11705 	if (match)
11706 	{
11707 	    if (type == 3)
11708 	    {
11709 		int i;
11710 
11711 		/* return list with matched string and submatches */
11712 		for (i = 0; i < NSUBEXP; ++i)
11713 		{
11714 		    if (regmatch.endp[i] == NULL)
11715 			break;
11716 		    li = listitem_alloc();
11717 		    if (li == NULL)
11718 			break;
11719 		    li->li_tv.v_type = VAR_STRING;
11720 		    li->li_tv.v_lock = 0;
11721 		    li->li_tv.vval.v_string = vim_strnsave(regmatch.startp[i],
11722 				(int)(regmatch.endp[i] - regmatch.startp[i]));
11723 		    list_append(rettv->vval.v_list, li);
11724 		}
11725 	    }
11726 	    else if (type == 2)
11727 	    {
11728 		/* return matched string */
11729 		if (l != NULL)
11730 		    copy_tv(&li->li_tv, rettv);
11731 		else
11732 		    rettv->vval.v_string = vim_strnsave(regmatch.startp[0],
11733 				(int)(regmatch.endp[0] - regmatch.startp[0]));
11734 	    }
11735 	    else if (l != NULL)
11736 		rettv->vval.v_number = idx;
11737 	    else
11738 	    {
11739 		if (type != 0)
11740 		    rettv->vval.v_number =
11741 				      (varnumber_T)(regmatch.startp[0] - str);
11742 		else
11743 		    rettv->vval.v_number =
11744 					(varnumber_T)(regmatch.endp[0] - str);
11745 		rettv->vval.v_number += str - expr;
11746 	    }
11747 	}
11748 	vim_free(regmatch.regprog);
11749     }
11750 
11751 theend:
11752     vim_free(tofree);
11753     p_cpo = save_cpo;
11754 }
11755 
11756 /*
11757  * "match()" function
11758  */
11759     static void
11760 f_match(argvars, rettv)
11761     typval_T	*argvars;
11762     typval_T	*rettv;
11763 {
11764     find_some_match(argvars, rettv, 1);
11765 }
11766 
11767 /*
11768  * "matchend()" function
11769  */
11770     static void
11771 f_matchend(argvars, rettv)
11772     typval_T	*argvars;
11773     typval_T	*rettv;
11774 {
11775     find_some_match(argvars, rettv, 0);
11776 }
11777 
11778 /*
11779  * "matchlist()" function
11780  */
11781     static void
11782 f_matchlist(argvars, rettv)
11783     typval_T	*argvars;
11784     typval_T	*rettv;
11785 {
11786     find_some_match(argvars, rettv, 3);
11787 }
11788 
11789 /*
11790  * "matchstr()" function
11791  */
11792     static void
11793 f_matchstr(argvars, rettv)
11794     typval_T	*argvars;
11795     typval_T	*rettv;
11796 {
11797     find_some_match(argvars, rettv, 2);
11798 }
11799 
11800 static void max_min __ARGS((typval_T *argvars, typval_T *rettv, int domax));
11801 
11802     static void
11803 max_min(argvars, rettv, domax)
11804     typval_T	*argvars;
11805     typval_T	*rettv;
11806     int		domax;
11807 {
11808     long	n = 0;
11809     long	i;
11810     int		error = FALSE;
11811 
11812     if (argvars[0].v_type == VAR_LIST)
11813     {
11814 	list_T		*l;
11815 	listitem_T	*li;
11816 
11817 	l = argvars[0].vval.v_list;
11818 	if (l != NULL)
11819 	{
11820 	    li = l->lv_first;
11821 	    if (li != NULL)
11822 	    {
11823 		n = get_tv_number_chk(&li->li_tv, &error);
11824 		for (;;)
11825 		{
11826 		    li = li->li_next;
11827 		    if (li == NULL)
11828 			break;
11829 		    i = get_tv_number_chk(&li->li_tv, &error);
11830 		    if (domax ? i > n : i < n)
11831 			n = i;
11832 		}
11833 	    }
11834 	}
11835     }
11836     else if (argvars[0].v_type == VAR_DICT)
11837     {
11838 	dict_T		*d;
11839 	int		first = TRUE;
11840 	hashitem_T	*hi;
11841 	int		todo;
11842 
11843 	d = argvars[0].vval.v_dict;
11844 	if (d != NULL)
11845 	{
11846 	    todo = d->dv_hashtab.ht_used;
11847 	    for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
11848 	    {
11849 		if (!HASHITEM_EMPTY(hi))
11850 		{
11851 		    --todo;
11852 		    i = get_tv_number_chk(&HI2DI(hi)->di_tv, &error);
11853 		    if (first)
11854 		    {
11855 			n = i;
11856 			first = FALSE;
11857 		    }
11858 		    else if (domax ? i > n : i < n)
11859 			n = i;
11860 		}
11861 	    }
11862 	}
11863     }
11864     else
11865 	EMSG(_(e_listdictarg));
11866     rettv->vval.v_number = error ? 0 : n;
11867 }
11868 
11869 /*
11870  * "max()" function
11871  */
11872     static void
11873 f_max(argvars, rettv)
11874     typval_T	*argvars;
11875     typval_T	*rettv;
11876 {
11877     max_min(argvars, rettv, TRUE);
11878 }
11879 
11880 /*
11881  * "min()" function
11882  */
11883     static void
11884 f_min(argvars, rettv)
11885     typval_T	*argvars;
11886     typval_T	*rettv;
11887 {
11888     max_min(argvars, rettv, FALSE);
11889 }
11890 
11891 static int mkdir_recurse __ARGS((char_u *dir, int prot));
11892 
11893 /*
11894  * Create the directory in which "dir" is located, and higher levels when
11895  * needed.
11896  */
11897     static int
11898 mkdir_recurse(dir, prot)
11899     char_u	*dir;
11900     int		prot;
11901 {
11902     char_u	*p;
11903     char_u	*updir;
11904     int		r = FAIL;
11905 
11906     /* Get end of directory name in "dir".
11907      * We're done when it's "/" or "c:/". */
11908     p = gettail_sep(dir);
11909     if (p <= get_past_head(dir))
11910 	return OK;
11911 
11912     /* If the directory exists we're done.  Otherwise: create it.*/
11913     updir = vim_strnsave(dir, (int)(p - dir));
11914     if (updir == NULL)
11915 	return FAIL;
11916     if (mch_isdir(updir))
11917 	r = OK;
11918     else if (mkdir_recurse(updir, prot) == OK)
11919 	r = vim_mkdir_emsg(updir, prot);
11920     vim_free(updir);
11921     return r;
11922 }
11923 
11924 #ifdef vim_mkdir
11925 /*
11926  * "mkdir()" function
11927  */
11928     static void
11929 f_mkdir(argvars, rettv)
11930     typval_T	*argvars;
11931     typval_T	*rettv;
11932 {
11933     char_u	*dir;
11934     char_u	buf[NUMBUFLEN];
11935     int		prot = 0755;
11936 
11937     rettv->vval.v_number = FAIL;
11938     if (check_restricted() || check_secure())
11939 	return;
11940 
11941     dir = get_tv_string_buf(&argvars[0], buf);
11942     if (argvars[1].v_type != VAR_UNKNOWN)
11943     {
11944 	if (argvars[2].v_type != VAR_UNKNOWN)
11945 	    prot = get_tv_number_chk(&argvars[2], NULL);
11946 	if (prot != -1 && STRCMP(get_tv_string(&argvars[1]), "p") == 0)
11947 	    mkdir_recurse(dir, prot);
11948     }
11949     rettv->vval.v_number = prot != -1 ? vim_mkdir_emsg(dir, prot) : 0;
11950 }
11951 #endif
11952 
11953 /*
11954  * "mode()" function
11955  */
11956 /*ARGSUSED*/
11957     static void
11958 f_mode(argvars, rettv)
11959     typval_T	*argvars;
11960     typval_T	*rettv;
11961 {
11962     char_u	buf[2];
11963 
11964 #ifdef FEAT_VISUAL
11965     if (VIsual_active)
11966     {
11967 	if (VIsual_select)
11968 	    buf[0] = VIsual_mode + 's' - 'v';
11969 	else
11970 	    buf[0] = VIsual_mode;
11971     }
11972     else
11973 #endif
11974 	if (State == HITRETURN || State == ASKMORE || State == SETWSIZE)
11975 	buf[0] = 'r';
11976     else if (State & INSERT)
11977     {
11978 	if (State & REPLACE_FLAG)
11979 	    buf[0] = 'R';
11980 	else
11981 	    buf[0] = 'i';
11982     }
11983     else if (State & CMDLINE)
11984 	buf[0] = 'c';
11985     else
11986 	buf[0] = 'n';
11987 
11988     buf[1] = NUL;
11989     rettv->vval.v_string = vim_strsave(buf);
11990     rettv->v_type = VAR_STRING;
11991 }
11992 
11993 /*
11994  * "nextnonblank()" function
11995  */
11996     static void
11997 f_nextnonblank(argvars, rettv)
11998     typval_T	*argvars;
11999     typval_T	*rettv;
12000 {
12001     linenr_T	lnum;
12002 
12003     for (lnum = get_tv_lnum(argvars); ; ++lnum)
12004     {
12005 	if (lnum < 0 || lnum > curbuf->b_ml.ml_line_count)
12006 	{
12007 	    lnum = 0;
12008 	    break;
12009 	}
12010 	if (*skipwhite(ml_get(lnum)) != NUL)
12011 	    break;
12012     }
12013     rettv->vval.v_number = lnum;
12014 }
12015 
12016 /*
12017  * "nr2char()" function
12018  */
12019     static void
12020 f_nr2char(argvars, rettv)
12021     typval_T	*argvars;
12022     typval_T	*rettv;
12023 {
12024     char_u	buf[NUMBUFLEN];
12025 
12026 #ifdef FEAT_MBYTE
12027     if (has_mbyte)
12028 	buf[(*mb_char2bytes)((int)get_tv_number(&argvars[0]), buf)] = NUL;
12029     else
12030 #endif
12031     {
12032 	buf[0] = (char_u)get_tv_number(&argvars[0]);
12033 	buf[1] = NUL;
12034     }
12035     rettv->v_type = VAR_STRING;
12036     rettv->vval.v_string = vim_strsave(buf);
12037 }
12038 
12039 /*
12040  * "prevnonblank()" function
12041  */
12042     static void
12043 f_prevnonblank(argvars, rettv)
12044     typval_T	*argvars;
12045     typval_T	*rettv;
12046 {
12047     linenr_T	lnum;
12048 
12049     lnum = get_tv_lnum(argvars);
12050     if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count)
12051 	lnum = 0;
12052     else
12053 	while (lnum >= 1 && *skipwhite(ml_get(lnum)) == NUL)
12054 	    --lnum;
12055     rettv->vval.v_number = lnum;
12056 }
12057 
12058 #ifdef HAVE_STDARG_H
12059 /* This dummy va_list is here because:
12060  * - passing a NULL pointer doesn't work when va_list isn't a pointer
12061  * - locally in the function results in a "used before set" warning
12062  * - using va_start() to initialize it gives "function with fixed args" error */
12063 static va_list	ap;
12064 #endif
12065 
12066 /*
12067  * "printf()" function
12068  */
12069     static void
12070 f_printf(argvars, rettv)
12071     typval_T	*argvars;
12072     typval_T	*rettv;
12073 {
12074     rettv->v_type = VAR_STRING;
12075     rettv->vval.v_string = NULL;
12076 #ifdef HAVE_STDARG_H	    /* only very old compilers can't do this */
12077     {
12078 	char_u	buf[NUMBUFLEN];
12079 	int	len;
12080 	char_u	*s;
12081 	int	saved_did_emsg = did_emsg;
12082 	char	*fmt;
12083 
12084 	/* Get the required length, allocate the buffer and do it for real. */
12085 	did_emsg = FALSE;
12086 	fmt = (char *)get_tv_string_buf(&argvars[0], buf);
12087 	len = vim_vsnprintf(NULL, 0, fmt, ap, argvars + 1);
12088 	if (!did_emsg)
12089 	{
12090 	    s = alloc(len + 1);
12091 	    if (s != NULL)
12092 	    {
12093 		rettv->vval.v_string = s;
12094 		(void)vim_vsnprintf((char *)s, len + 1, fmt, ap, argvars + 1);
12095 	    }
12096 	}
12097 	did_emsg |= saved_did_emsg;
12098     }
12099 #endif
12100 }
12101 
12102 /*
12103  * "range()" function
12104  */
12105     static void
12106 f_range(argvars, rettv)
12107     typval_T	*argvars;
12108     typval_T	*rettv;
12109 {
12110     long	start;
12111     long	end;
12112     long	stride = 1;
12113     long	i;
12114     list_T	*l;
12115     listitem_T	*li;
12116     int		error = FALSE;
12117 
12118     start = get_tv_number_chk(&argvars[0], &error);
12119     if (argvars[1].v_type == VAR_UNKNOWN)
12120     {
12121 	end = start - 1;
12122 	start = 0;
12123     }
12124     else
12125     {
12126 	end = get_tv_number_chk(&argvars[1], &error);
12127 	if (argvars[2].v_type != VAR_UNKNOWN)
12128 	    stride = get_tv_number_chk(&argvars[2], &error);
12129     }
12130 
12131     rettv->vval.v_number = 0;
12132     if (error)
12133 	return;		/* type error; errmsg already given */
12134     if (stride == 0)
12135 	EMSG(_("E726: Stride is zero"));
12136     else if (stride > 0 ? end + 1 < start : end - 1 > start)
12137 	EMSG(_("E727: Start past end"));
12138     else
12139     {
12140 	l = list_alloc();
12141 	if (l != NULL)
12142 	{
12143 	    rettv->v_type = VAR_LIST;
12144 	    rettv->vval.v_list = l;
12145 	    ++l->lv_refcount;
12146 
12147 	    for (i = start; stride > 0 ? i <= end : i >= end; i += stride)
12148 	    {
12149 		li = listitem_alloc();
12150 		if (li == NULL)
12151 		    break;
12152 		li->li_tv.v_type = VAR_NUMBER;
12153 		li->li_tv.v_lock = 0;
12154 		li->li_tv.vval.v_number = i;
12155 		list_append(l, li);
12156 	    }
12157 	}
12158     }
12159 }
12160 
12161 /*
12162  * "readfile()" function
12163  */
12164     static void
12165 f_readfile(argvars, rettv)
12166     typval_T	*argvars;
12167     typval_T	*rettv;
12168 {
12169     int		binary = FALSE;
12170     char_u	*fname;
12171     FILE	*fd;
12172     list_T	*l;
12173     listitem_T	*li;
12174 #define FREAD_SIZE 200	    /* optimized for text lines */
12175     char_u	buf[FREAD_SIZE];
12176     int		readlen;    /* size of last fread() */
12177     int		buflen;	    /* nr of valid chars in buf[] */
12178     int		filtd;	    /* how much in buf[] was NUL -> '\n' filtered */
12179     int		tolist;	    /* first byte in buf[] still to be put in list */
12180     int		chop;	    /* how many CR to chop off */
12181     char_u	*prev = NULL;	/* previously read bytes, if any */
12182     int		prevlen = 0;    /* length of "prev" if not NULL */
12183     char_u	*s;
12184     int		len;
12185     long	maxline = MAXLNUM;
12186     long	cnt = 0;
12187 
12188     if (argvars[1].v_type != VAR_UNKNOWN)
12189     {
12190 	if (STRCMP(get_tv_string(&argvars[1]), "b") == 0)
12191 	    binary = TRUE;
12192 	if (argvars[2].v_type != VAR_UNKNOWN)
12193 	    maxline = get_tv_number(&argvars[2]);
12194     }
12195 
12196     l = list_alloc();
12197     if (l == NULL)
12198 	return;
12199     rettv->v_type = VAR_LIST;
12200     rettv->vval.v_list = l;
12201     l->lv_refcount = 1;
12202 
12203     /* Always open the file in binary mode, library functions have a mind of
12204      * their own about CR-LF conversion. */
12205     fname = get_tv_string(&argvars[0]);
12206     if (*fname == NUL || (fd = mch_fopen((char *)fname, READBIN)) == NULL)
12207     {
12208 	EMSG2(_(e_notopen), *fname == NUL ? (char_u *)_("<empty>") : fname);
12209 	return;
12210     }
12211 
12212     filtd = 0;
12213     while (cnt < maxline || maxline < 0)
12214     {
12215 	readlen = fread(buf + filtd, 1, FREAD_SIZE - filtd, fd);
12216 	buflen = filtd + readlen;
12217 	tolist = 0;
12218 	for ( ; filtd < buflen || readlen <= 0; ++filtd)
12219 	{
12220 	    if (buf[filtd] == '\n' || readlen <= 0)
12221 	    {
12222 		/* Only when in binary mode add an empty list item when the
12223 		 * last line ends in a '\n'. */
12224 		if (!binary && readlen == 0 && filtd == 0)
12225 		    break;
12226 
12227 		/* Found end-of-line or end-of-file: add a text line to the
12228 		 * list. */
12229 		chop = 0;
12230 		if (!binary)
12231 		    while (filtd - chop - 1 >= tolist
12232 					  && buf[filtd - chop - 1] == '\r')
12233 			++chop;
12234 		len = filtd - tolist - chop;
12235 		if (prev == NULL)
12236 		    s = vim_strnsave(buf + tolist, len);
12237 		else
12238 		{
12239 		    s = alloc((unsigned)(prevlen + len + 1));
12240 		    if (s != NULL)
12241 		    {
12242 			mch_memmove(s, prev, prevlen);
12243 			vim_free(prev);
12244 			prev = NULL;
12245 			mch_memmove(s + prevlen, buf + tolist, len);
12246 			s[prevlen + len] = NUL;
12247 		    }
12248 		}
12249 		tolist = filtd + 1;
12250 
12251 		li = listitem_alloc();
12252 		if (li == NULL)
12253 		{
12254 		    vim_free(s);
12255 		    break;
12256 		}
12257 		li->li_tv.v_type = VAR_STRING;
12258 		li->li_tv.v_lock = 0;
12259 		li->li_tv.vval.v_string = s;
12260 		list_append(l, li);
12261 
12262 		if (++cnt >= maxline && maxline >= 0)
12263 		    break;
12264 		if (readlen <= 0)
12265 		    break;
12266 	    }
12267 	    else if (buf[filtd] == NUL)
12268 		buf[filtd] = '\n';
12269 	}
12270 	if (readlen <= 0)
12271 	    break;
12272 
12273 	if (tolist == 0)
12274 	{
12275 	    /* "buf" is full, need to move text to an allocated buffer */
12276 	    if (prev == NULL)
12277 	    {
12278 		prev = vim_strnsave(buf, buflen);
12279 		prevlen = buflen;
12280 	    }
12281 	    else
12282 	    {
12283 		s = alloc((unsigned)(prevlen + buflen));
12284 		if (s != NULL)
12285 		{
12286 		    mch_memmove(s, prev, prevlen);
12287 		    mch_memmove(s + prevlen, buf, buflen);
12288 		    vim_free(prev);
12289 		    prev = s;
12290 		    prevlen += buflen;
12291 		}
12292 	    }
12293 	    filtd = 0;
12294 	}
12295 	else
12296 	{
12297 	    mch_memmove(buf, buf + tolist, buflen - tolist);
12298 	    filtd -= tolist;
12299 	}
12300     }
12301 
12302     /*
12303      * For a negative line count use only the lines at the end of the file,
12304      * free the rest.
12305      */
12306     if (maxline < 0)
12307 	while (cnt > -maxline)
12308 	{
12309 	    listitem_remove(l, l->lv_first);
12310 	    --cnt;
12311 	}
12312 
12313     vim_free(prev);
12314     fclose(fd);
12315 }
12316 
12317 
12318 #if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
12319 static void make_connection __ARGS((void));
12320 static int check_connection __ARGS((void));
12321 
12322     static void
12323 make_connection()
12324 {
12325     if (X_DISPLAY == NULL
12326 # ifdef FEAT_GUI
12327 	    && !gui.in_use
12328 # endif
12329 	    )
12330     {
12331 	x_force_connect = TRUE;
12332 	setup_term_clip();
12333 	x_force_connect = FALSE;
12334     }
12335 }
12336 
12337     static int
12338 check_connection()
12339 {
12340     make_connection();
12341     if (X_DISPLAY == NULL)
12342     {
12343 	EMSG(_("E240: No connection to Vim server"));
12344 	return FAIL;
12345     }
12346     return OK;
12347 }
12348 #endif
12349 
12350 #ifdef FEAT_CLIENTSERVER
12351 static void remote_common __ARGS((typval_T *argvars, typval_T *rettv, int expr));
12352 
12353     static void
12354 remote_common(argvars, rettv, expr)
12355     typval_T	*argvars;
12356     typval_T	*rettv;
12357     int		expr;
12358 {
12359     char_u	*server_name;
12360     char_u	*keys;
12361     char_u	*r = NULL;
12362     char_u	buf[NUMBUFLEN];
12363 # ifdef WIN32
12364     HWND	w;
12365 # else
12366     Window	w;
12367 # endif
12368 
12369     if (check_restricted() || check_secure())
12370 	return;
12371 
12372 # ifdef FEAT_X11
12373     if (check_connection() == FAIL)
12374 	return;
12375 # endif
12376 
12377     server_name = get_tv_string_chk(&argvars[0]);
12378     if (server_name == NULL)
12379 	return;		/* type error; errmsg already given */
12380     keys = get_tv_string_buf(&argvars[1], buf);
12381 # ifdef WIN32
12382     if (serverSendToVim(server_name, keys, &r, &w, expr, TRUE) < 0)
12383 # else
12384     if (serverSendToVim(X_DISPLAY, server_name, keys, &r, &w, expr, 0, TRUE)
12385 									  < 0)
12386 # endif
12387     {
12388 	if (r != NULL)
12389 	    EMSG(r);		/* sending worked but evaluation failed */
12390 	else
12391 	    EMSG2(_("E241: Unable to send to %s"), server_name);
12392 	return;
12393     }
12394 
12395     rettv->vval.v_string = r;
12396 
12397     if (argvars[2].v_type != VAR_UNKNOWN)
12398     {
12399 	dictitem_T	v;
12400 	char_u		str[30];
12401 	char_u		*idvar;
12402 
12403 	sprintf((char *)str, "0x%x", (unsigned int)w);
12404 	v.di_tv.v_type = VAR_STRING;
12405 	v.di_tv.vval.v_string = vim_strsave(str);
12406 	idvar = get_tv_string_chk(&argvars[2]);
12407 	if (idvar != NULL)
12408 	    set_var(idvar, &v.di_tv, FALSE);
12409 	vim_free(v.di_tv.vval.v_string);
12410     }
12411 }
12412 #endif
12413 
12414 /*
12415  * "remote_expr()" function
12416  */
12417 /*ARGSUSED*/
12418     static void
12419 f_remote_expr(argvars, rettv)
12420     typval_T	*argvars;
12421     typval_T	*rettv;
12422 {
12423     rettv->v_type = VAR_STRING;
12424     rettv->vval.v_string = NULL;
12425 #ifdef FEAT_CLIENTSERVER
12426     remote_common(argvars, rettv, TRUE);
12427 #endif
12428 }
12429 
12430 /*
12431  * "remote_foreground()" function
12432  */
12433 /*ARGSUSED*/
12434     static void
12435 f_remote_foreground(argvars, rettv)
12436     typval_T	*argvars;
12437     typval_T	*rettv;
12438 {
12439     rettv->vval.v_number = 0;
12440 #ifdef FEAT_CLIENTSERVER
12441 # ifdef WIN32
12442     /* On Win32 it's done in this application. */
12443     {
12444 	char_u	*server_name = get_tv_string_chk(&argvars[0]);
12445 
12446 	if (server_name != NULL)
12447 	    serverForeground(server_name);
12448     }
12449 # else
12450     /* Send a foreground() expression to the server. */
12451     argvars[1].v_type = VAR_STRING;
12452     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
12453     argvars[2].v_type = VAR_UNKNOWN;
12454     remote_common(argvars, rettv, TRUE);
12455     vim_free(argvars[1].vval.v_string);
12456 # endif
12457 #endif
12458 }
12459 
12460 /*ARGSUSED*/
12461     static void
12462 f_remote_peek(argvars, rettv)
12463     typval_T	*argvars;
12464     typval_T	*rettv;
12465 {
12466 #ifdef FEAT_CLIENTSERVER
12467     dictitem_T	v;
12468     char_u	*s = NULL;
12469 # ifdef WIN32
12470     int		n = 0;
12471 # endif
12472     char_u	*serverid;
12473 
12474     if (check_restricted() || check_secure())
12475     {
12476 	rettv->vval.v_number = -1;
12477 	return;
12478     }
12479     serverid = get_tv_string_chk(&argvars[0]);
12480     if (serverid == NULL)
12481     {
12482 	rettv->vval.v_number = -1;
12483 	return;		/* type error; errmsg already given */
12484     }
12485 # ifdef WIN32
12486     sscanf(serverid, "%x", &n);
12487     if (n == 0)
12488 	rettv->vval.v_number = -1;
12489     else
12490     {
12491 	s = serverGetReply((HWND)n, FALSE, FALSE, FALSE);
12492 	rettv->vval.v_number = (s != NULL);
12493     }
12494 # else
12495     rettv->vval.v_number = 0;
12496     if (check_connection() == FAIL)
12497 	return;
12498 
12499     rettv->vval.v_number = serverPeekReply(X_DISPLAY,
12500 						serverStrToWin(serverid), &s);
12501 # endif
12502 
12503     if (argvars[1].v_type != VAR_UNKNOWN && rettv->vval.v_number > 0)
12504     {
12505 	char_u		*retvar;
12506 
12507 	v.di_tv.v_type = VAR_STRING;
12508 	v.di_tv.vval.v_string = vim_strsave(s);
12509 	retvar = get_tv_string_chk(&argvars[1]);
12510 	if (retvar != NULL)
12511 	    set_var(retvar, &v.di_tv, FALSE);
12512 	vim_free(v.di_tv.vval.v_string);
12513     }
12514 #else
12515     rettv->vval.v_number = -1;
12516 #endif
12517 }
12518 
12519 /*ARGSUSED*/
12520     static void
12521 f_remote_read(argvars, rettv)
12522     typval_T	*argvars;
12523     typval_T	*rettv;
12524 {
12525     char_u	*r = NULL;
12526 
12527 #ifdef FEAT_CLIENTSERVER
12528     char_u	*serverid = get_tv_string_chk(&argvars[0]);
12529 
12530     if (serverid != NULL && !check_restricted() && !check_secure())
12531     {
12532 # ifdef WIN32
12533 	/* The server's HWND is encoded in the 'id' parameter */
12534 	int		n = 0;
12535 
12536 	sscanf(serverid, "%x", &n);
12537 	if (n != 0)
12538 	    r = serverGetReply((HWND)n, FALSE, TRUE, TRUE);
12539 	if (r == NULL)
12540 # else
12541 	if (check_connection() == FAIL || serverReadReply(X_DISPLAY,
12542 		serverStrToWin(serverid), &r, FALSE) < 0)
12543 # endif
12544 	    EMSG(_("E277: Unable to read a server reply"));
12545     }
12546 #endif
12547     rettv->v_type = VAR_STRING;
12548     rettv->vval.v_string = r;
12549 }
12550 
12551 /*
12552  * "remote_send()" function
12553  */
12554 /*ARGSUSED*/
12555     static void
12556 f_remote_send(argvars, rettv)
12557     typval_T	*argvars;
12558     typval_T	*rettv;
12559 {
12560     rettv->v_type = VAR_STRING;
12561     rettv->vval.v_string = NULL;
12562 #ifdef FEAT_CLIENTSERVER
12563     remote_common(argvars, rettv, FALSE);
12564 #endif
12565 }
12566 
12567 /*
12568  * "remove()" function
12569  */
12570     static void
12571 f_remove(argvars, rettv)
12572     typval_T	*argvars;
12573     typval_T	*rettv;
12574 {
12575     list_T	*l;
12576     listitem_T	*item, *item2;
12577     listitem_T	*li;
12578     long	idx;
12579     long	end;
12580     char_u	*key;
12581     dict_T	*d;
12582     dictitem_T	*di;
12583 
12584     rettv->vval.v_number = 0;
12585     if (argvars[0].v_type == VAR_DICT)
12586     {
12587 	if (argvars[2].v_type != VAR_UNKNOWN)
12588 	    EMSG2(_(e_toomanyarg), "remove()");
12589 	else if ((d = argvars[0].vval.v_dict) != NULL
12590 		&& !tv_check_lock(d->dv_lock, (char_u *)"remove()"))
12591 	{
12592 	    key = get_tv_string_chk(&argvars[1]);
12593 	    if (key != NULL)
12594 	    {
12595 		di = dict_find(d, key, -1);
12596 		if (di == NULL)
12597 		    EMSG2(_(e_dictkey), key);
12598 		else
12599 		{
12600 		    *rettv = di->di_tv;
12601 		    init_tv(&di->di_tv);
12602 		    dictitem_remove(d, di);
12603 		}
12604 	    }
12605 	}
12606     }
12607     else if (argvars[0].v_type != VAR_LIST)
12608 	EMSG2(_(e_listdictarg), "remove()");
12609     else if ((l = argvars[0].vval.v_list) != NULL
12610 	    && !tv_check_lock(l->lv_lock, (char_u *)"remove()"))
12611     {
12612 	int	    error = FALSE;
12613 
12614 	idx = get_tv_number_chk(&argvars[1], &error);
12615 	if (error)
12616 	    ;		/* type error: do nothing, errmsg already given */
12617 	else if ((item = list_find(l, idx)) == NULL)
12618 	    EMSGN(_(e_listidx), idx);
12619 	else
12620 	{
12621 	    if (argvars[2].v_type == VAR_UNKNOWN)
12622 	    {
12623 		/* Remove one item, return its value. */
12624 		list_remove(l, item, item);
12625 		*rettv = item->li_tv;
12626 		vim_free(item);
12627 	    }
12628 	    else
12629 	    {
12630 		/* Remove range of items, return list with values. */
12631 		end = get_tv_number_chk(&argvars[2], &error);
12632 		if (error)
12633 		    ;		/* type error: do nothing */
12634 		else if ((item2 = list_find(l, end)) == NULL)
12635 		    EMSGN(_(e_listidx), end);
12636 		else
12637 		{
12638 		    int	    cnt = 0;
12639 
12640 		    for (li = item; li != NULL; li = li->li_next)
12641 		    {
12642 			++cnt;
12643 			if (li == item2)
12644 			    break;
12645 		    }
12646 		    if (li == NULL)  /* didn't find "item2" after "item" */
12647 			EMSG(_(e_invrange));
12648 		    else
12649 		    {
12650 			list_remove(l, item, item2);
12651 			l = list_alloc();
12652 			if (l != NULL)
12653 			{
12654 			    rettv->v_type = VAR_LIST;
12655 			    rettv->vval.v_list = l;
12656 			    l->lv_first = item;
12657 			    l->lv_last = item2;
12658 			    l->lv_refcount = 1;
12659 			    item->li_prev = NULL;
12660 			    item2->li_next = NULL;
12661 			    l->lv_len = cnt;
12662 			}
12663 		    }
12664 		}
12665 	    }
12666 	}
12667     }
12668 }
12669 
12670 /*
12671  * "rename({from}, {to})" function
12672  */
12673     static void
12674 f_rename(argvars, rettv)
12675     typval_T	*argvars;
12676     typval_T	*rettv;
12677 {
12678     char_u	buf[NUMBUFLEN];
12679 
12680     if (check_restricted() || check_secure())
12681 	rettv->vval.v_number = -1;
12682     else
12683 	rettv->vval.v_number = vim_rename(get_tv_string(&argvars[0]),
12684 				      get_tv_string_buf(&argvars[1], buf));
12685 }
12686 
12687 /*
12688  * "repeat()" function
12689  */
12690 /*ARGSUSED*/
12691     static void
12692 f_repeat(argvars, rettv)
12693     typval_T	*argvars;
12694     typval_T	*rettv;
12695 {
12696     char_u	*p;
12697     int		n;
12698     int		slen;
12699     int		len;
12700     char_u	*r;
12701     int		i;
12702     list_T	*l;
12703 
12704     n = get_tv_number(&argvars[1]);
12705     if (argvars[0].v_type == VAR_LIST)
12706     {
12707 	l = list_alloc();
12708 	if (l != NULL && argvars[0].vval.v_list != NULL)
12709 	{
12710 	    l->lv_refcount = 1;
12711 	    while (n-- > 0)
12712 		if (list_extend(l, argvars[0].vval.v_list, NULL) == FAIL)
12713 		    break;
12714 	}
12715 	rettv->v_type = VAR_LIST;
12716 	rettv->vval.v_list = l;
12717     }
12718     else
12719     {
12720 	p = get_tv_string(&argvars[0]);
12721 	rettv->v_type = VAR_STRING;
12722 	rettv->vval.v_string = NULL;
12723 
12724 	slen = (int)STRLEN(p);
12725 	len = slen * n;
12726 	if (len <= 0)
12727 	    return;
12728 
12729 	r = alloc(len + 1);
12730 	if (r != NULL)
12731 	{
12732 	    for (i = 0; i < n; i++)
12733 		mch_memmove(r + i * slen, p, (size_t)slen);
12734 	    r[len] = NUL;
12735 	}
12736 
12737 	rettv->vval.v_string = r;
12738     }
12739 }
12740 
12741 /*
12742  * "resolve()" function
12743  */
12744     static void
12745 f_resolve(argvars, rettv)
12746     typval_T	*argvars;
12747     typval_T	*rettv;
12748 {
12749     char_u	*p;
12750 
12751     p = get_tv_string(&argvars[0]);
12752 #ifdef FEAT_SHORTCUT
12753     {
12754 	char_u	*v = NULL;
12755 
12756 	v = mch_resolve_shortcut(p);
12757 	if (v != NULL)
12758 	    rettv->vval.v_string = v;
12759 	else
12760 	    rettv->vval.v_string = vim_strsave(p);
12761     }
12762 #else
12763 # ifdef HAVE_READLINK
12764     {
12765 	char_u	buf[MAXPATHL + 1];
12766 	char_u	*cpy;
12767 	int	len;
12768 	char_u	*remain = NULL;
12769 	char_u	*q;
12770 	int	is_relative_to_current = FALSE;
12771 	int	has_trailing_pathsep = FALSE;
12772 	int	limit = 100;
12773 
12774 	p = vim_strsave(p);
12775 
12776 	if (p[0] == '.' && (vim_ispathsep(p[1])
12777 				   || (p[1] == '.' && (vim_ispathsep(p[2])))))
12778 	    is_relative_to_current = TRUE;
12779 
12780 	len = STRLEN(p);
12781 	if (len > 0 && after_pathsep(p, p + len))
12782 	    has_trailing_pathsep = TRUE;
12783 
12784 	q = getnextcomp(p);
12785 	if (*q != NUL)
12786 	{
12787 	    /* Separate the first path component in "p", and keep the
12788 	     * remainder (beginning with the path separator). */
12789 	    remain = vim_strsave(q - 1);
12790 	    q[-1] = NUL;
12791 	}
12792 
12793 	for (;;)
12794 	{
12795 	    for (;;)
12796 	    {
12797 		len = readlink((char *)p, (char *)buf, MAXPATHL);
12798 		if (len <= 0)
12799 		    break;
12800 		buf[len] = NUL;
12801 
12802 		if (limit-- == 0)
12803 		{
12804 		    vim_free(p);
12805 		    vim_free(remain);
12806 		    EMSG(_("E655: Too many symbolic links (cycle?)"));
12807 		    rettv->vval.v_string = NULL;
12808 		    goto fail;
12809 		}
12810 
12811 		/* Ensure that the result will have a trailing path separator
12812 		 * if the argument has one. */
12813 		if (remain == NULL && has_trailing_pathsep)
12814 		    add_pathsep(buf);
12815 
12816 		/* Separate the first path component in the link value and
12817 		 * concatenate the remainders. */
12818 		q = getnextcomp(vim_ispathsep(*buf) ? buf + 1 : buf);
12819 		if (*q != NUL)
12820 		{
12821 		    if (remain == NULL)
12822 			remain = vim_strsave(q - 1);
12823 		    else
12824 		    {
12825 			cpy = vim_strnsave(q-1, STRLEN(q-1) + STRLEN(remain));
12826 			if (cpy != NULL)
12827 			{
12828 			    STRCAT(cpy, remain);
12829 			    vim_free(remain);
12830 			    remain = cpy;
12831 			}
12832 		    }
12833 		    q[-1] = NUL;
12834 		}
12835 
12836 		q = gettail(p);
12837 		if (q > p && *q == NUL)
12838 		{
12839 		    /* Ignore trailing path separator. */
12840 		    q[-1] = NUL;
12841 		    q = gettail(p);
12842 		}
12843 		if (q > p && !mch_isFullName(buf))
12844 		{
12845 		    /* symlink is relative to directory of argument */
12846 		    cpy = alloc((unsigned)(STRLEN(p) + STRLEN(buf) + 1));
12847 		    if (cpy != NULL)
12848 		    {
12849 			STRCPY(cpy, p);
12850 			STRCPY(gettail(cpy), buf);
12851 			vim_free(p);
12852 			p = cpy;
12853 		    }
12854 		}
12855 		else
12856 		{
12857 		    vim_free(p);
12858 		    p = vim_strsave(buf);
12859 		}
12860 	    }
12861 
12862 	    if (remain == NULL)
12863 		break;
12864 
12865 	    /* Append the first path component of "remain" to "p". */
12866 	    q = getnextcomp(remain + 1);
12867 	    len = q - remain - (*q != NUL);
12868 	    cpy = vim_strnsave(p, STRLEN(p) + len);
12869 	    if (cpy != NULL)
12870 	    {
12871 		STRNCAT(cpy, remain, len);
12872 		vim_free(p);
12873 		p = cpy;
12874 	    }
12875 	    /* Shorten "remain". */
12876 	    if (*q != NUL)
12877 		STRCPY(remain, q - 1);
12878 	    else
12879 	    {
12880 		vim_free(remain);
12881 		remain = NULL;
12882 	    }
12883 	}
12884 
12885 	/* If the result is a relative path name, make it explicitly relative to
12886 	 * the current directory if and only if the argument had this form. */
12887 	if (!vim_ispathsep(*p))
12888 	{
12889 	    if (is_relative_to_current
12890 		    && *p != NUL
12891 		    && !(p[0] == '.'
12892 			&& (p[1] == NUL
12893 			    || vim_ispathsep(p[1])
12894 			    || (p[1] == '.'
12895 				&& (p[2] == NUL
12896 				    || vim_ispathsep(p[2]))))))
12897 	    {
12898 		/* Prepend "./". */
12899 		cpy = concat_str((char_u *)"./", p);
12900 		if (cpy != NULL)
12901 		{
12902 		    vim_free(p);
12903 		    p = cpy;
12904 		}
12905 	    }
12906 	    else if (!is_relative_to_current)
12907 	    {
12908 		/* Strip leading "./". */
12909 		q = p;
12910 		while (q[0] == '.' && vim_ispathsep(q[1]))
12911 		    q += 2;
12912 		if (q > p)
12913 		    mch_memmove(p, p + 2, STRLEN(p + 2) + (size_t)1);
12914 	    }
12915 	}
12916 
12917 	/* Ensure that the result will have no trailing path separator
12918 	 * if the argument had none.  But keep "/" or "//". */
12919 	if (!has_trailing_pathsep)
12920 	{
12921 	    q = p + STRLEN(p);
12922 	    if (after_pathsep(p, q))
12923 		*gettail_sep(p) = NUL;
12924 	}
12925 
12926 	rettv->vval.v_string = p;
12927     }
12928 # else
12929     rettv->vval.v_string = vim_strsave(p);
12930 # endif
12931 #endif
12932 
12933     simplify_filename(rettv->vval.v_string);
12934 
12935 #ifdef HAVE_READLINK
12936 fail:
12937 #endif
12938     rettv->v_type = VAR_STRING;
12939 }
12940 
12941 /*
12942  * "reverse({list})" function
12943  */
12944     static void
12945 f_reverse(argvars, rettv)
12946     typval_T	*argvars;
12947     typval_T	*rettv;
12948 {
12949     list_T	*l;
12950     listitem_T	*li, *ni;
12951 
12952     rettv->vval.v_number = 0;
12953     if (argvars[0].v_type != VAR_LIST)
12954 	EMSG2(_(e_listarg), "reverse()");
12955     else if ((l = argvars[0].vval.v_list) != NULL
12956 	    && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
12957     {
12958 	li = l->lv_last;
12959 	l->lv_first = l->lv_last = NULL;
12960 	l->lv_len = 0;
12961 	while (li != NULL)
12962 	{
12963 	    ni = li->li_prev;
12964 	    list_append(l, li);
12965 	    li = ni;
12966 	}
12967 	rettv->vval.v_list = l;
12968 	rettv->v_type = VAR_LIST;
12969 	++l->lv_refcount;
12970     }
12971 }
12972 
12973 #define SP_NOMOVE	1	/* don't move cursor */
12974 #define SP_REPEAT	2	/* repeat to find outer pair */
12975 #define SP_RETCOUNT	4	/* return matchcount */
12976 #define SP_SETPCMARK	8       /* set previous context mark */
12977 
12978 static int get_search_arg __ARGS((typval_T *varp, int *flagsp));
12979 
12980 /*
12981  * Get flags for a search function.
12982  * Possibly sets "p_ws".
12983  * Returns BACKWARD, FORWARD or zero (for an error).
12984  */
12985     static int
12986 get_search_arg(varp, flagsp)
12987     typval_T	*varp;
12988     int		*flagsp;
12989 {
12990     int		dir = FORWARD;
12991     char_u	*flags;
12992     char_u	nbuf[NUMBUFLEN];
12993     int		mask;
12994 
12995     if (varp->v_type != VAR_UNKNOWN)
12996     {
12997 	flags = get_tv_string_buf_chk(varp, nbuf);
12998 	if (flags == NULL)
12999 	    return 0;		/* type error; errmsg already given */
13000 	while (*flags != NUL)
13001 	{
13002 	    switch (*flags)
13003 	    {
13004 		case 'b': dir = BACKWARD; break;
13005 		case 'w': p_ws = TRUE; break;
13006 		case 'W': p_ws = FALSE; break;
13007 		default:  mask = 0;
13008 			  if (flagsp != NULL)
13009 			     switch (*flags)
13010 			     {
13011 				 case 'n': mask = SP_NOMOVE; break;
13012 				 case 'r': mask = SP_REPEAT; break;
13013 				 case 'm': mask = SP_RETCOUNT; break;
13014 				 case 's': mask = SP_SETPCMARK; break;
13015 			     }
13016 			  if (mask == 0)
13017 			  {
13018 			      EMSG2(_(e_invarg2), flags);
13019 			      dir = 0;
13020 			  }
13021 			  else
13022 			      *flagsp |= mask;
13023 	    }
13024 	    if (dir == 0)
13025 		break;
13026 	    ++flags;
13027 	}
13028     }
13029     return dir;
13030 }
13031 
13032 /*
13033  * "search()" function
13034  */
13035     static void
13036 f_search(argvars, rettv)
13037     typval_T	*argvars;
13038     typval_T	*rettv;
13039 {
13040     char_u	*pat;
13041     pos_T	pos;
13042     pos_T	save_cursor;
13043     int		save_p_ws = p_ws;
13044     int		dir;
13045     int		flags = 0;
13046 
13047     rettv->vval.v_number = 0;	/* default: FAIL */
13048 
13049     pat = get_tv_string(&argvars[0]);
13050     dir = get_search_arg(&argvars[1], &flags);	/* may set p_ws */
13051     if (dir == 0)
13052 	goto theend;
13053     /*
13054      * This function accepts only SP_NOMOVE and SP_SETPCMARK flags.
13055      * Check to make sure only those flags are set.
13056      * Also, Only the SP_NOMOVE or the SP_SETPCMARK flag can be set. Both
13057      * flags cannot be set. Check for that condition also.
13058      */
13059     if (((flags & ~(SP_NOMOVE | SP_SETPCMARK)) != 0) ||
13060 	((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
13061     {
13062 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13063 	goto theend;
13064     }
13065 
13066     pos = save_cursor = curwin->w_cursor;
13067     if (searchit(curwin, curbuf, &pos, dir, pat, 1L,
13068 					      SEARCH_KEEP, RE_SEARCH) != FAIL)
13069     {
13070 	rettv->vval.v_number = pos.lnum;
13071 	if (flags & SP_SETPCMARK)
13072 	    setpcmark();
13073 	curwin->w_cursor = pos;
13074 	/* "/$" will put the cursor after the end of the line, may need to
13075 	 * correct that here */
13076 	check_cursor();
13077     }
13078 
13079     /* If 'n' flag is used: restore cursor position. */
13080     if (flags & SP_NOMOVE)
13081 	curwin->w_cursor = save_cursor;
13082 theend:
13083     p_ws = save_p_ws;
13084 }
13085 
13086 /*
13087  * "searchdecl()" function
13088  */
13089     static void
13090 f_searchdecl(argvars, rettv)
13091     typval_T	*argvars;
13092     typval_T	*rettv;
13093 {
13094     int		locally = 1;
13095     int		thisblock = 0;
13096     int		error = FALSE;
13097     char_u	*name;
13098 
13099     rettv->vval.v_number = 1;	/* default: FAIL */
13100 
13101     name = get_tv_string_chk(&argvars[0]);
13102     if (argvars[1].v_type != VAR_UNKNOWN)
13103     {
13104 	locally = get_tv_number_chk(&argvars[1], &error) == 0;
13105 	if (!error && argvars[2].v_type != VAR_UNKNOWN)
13106 	    thisblock = get_tv_number_chk(&argvars[2], &error) != 0;
13107     }
13108     if (!error && name != NULL)
13109 	rettv->vval.v_number = find_decl(name, (int)STRLEN(name),
13110 				     locally, thisblock, SEARCH_KEEP) == FAIL;
13111 }
13112 
13113 /*
13114  * "searchpair()" function
13115  */
13116     static void
13117 f_searchpair(argvars, rettv)
13118     typval_T	*argvars;
13119     typval_T	*rettv;
13120 {
13121     char_u	*spat, *mpat, *epat;
13122     char_u	*skip;
13123     int		save_p_ws = p_ws;
13124     int		dir;
13125     int		flags = 0;
13126     char_u	nbuf1[NUMBUFLEN];
13127     char_u	nbuf2[NUMBUFLEN];
13128     char_u	nbuf3[NUMBUFLEN];
13129 
13130     rettv->vval.v_number = 0;	/* default: FAIL */
13131 
13132     /* Get the three pattern arguments: start, middle, end. */
13133     spat = get_tv_string_chk(&argvars[0]);
13134     mpat = get_tv_string_buf_chk(&argvars[1], nbuf1);
13135     epat = get_tv_string_buf_chk(&argvars[2], nbuf2);
13136     if (spat == NULL || mpat == NULL || epat == NULL)
13137 	goto theend;	    /* type error */
13138 
13139     /* Handle the optional fourth argument: flags */
13140     dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
13141     if (dir == 0)
13142 	goto theend;
13143     /*
13144      * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
13145      */
13146     if ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK))
13147     {
13148 	EMSG2(_(e_invarg2), get_tv_string(&argvars[1]));
13149 	goto theend;
13150     }
13151 
13152     /* Optional fifth argument: skip expresion */
13153     if (argvars[3].v_type == VAR_UNKNOWN
13154 	    || argvars[4].v_type == VAR_UNKNOWN)
13155 	skip = (char_u *)"";
13156     else
13157 	skip = get_tv_string_buf_chk(&argvars[4], nbuf3);
13158     if (skip == NULL)
13159 	goto theend;	    /* type error */
13160 
13161     rettv->vval.v_number = do_searchpair(spat, mpat, epat, dir, skip, flags);
13162 
13163 theend:
13164     p_ws = save_p_ws;
13165 }
13166 
13167 /*
13168  * Search for a start/middle/end thing.
13169  * Used by searchpair(), see its documentation for the details.
13170  * Returns 0 or -1 for no match,
13171  */
13172     long
13173 do_searchpair(spat, mpat, epat, dir, skip, flags)
13174     char_u	*spat;	    /* start pattern */
13175     char_u	*mpat;	    /* middle pattern */
13176     char_u	*epat;	    /* end pattern */
13177     int		dir;	    /* BACKWARD or FORWARD */
13178     char_u	*skip;	    /* skip expression */
13179     int		flags;	    /* SP_RETCOUNT, SP_REPEAT, SP_NOMOVE */
13180 {
13181     char_u	*save_cpo;
13182     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
13183     long	retval = 0;
13184     pos_T	pos;
13185     pos_T	firstpos;
13186     pos_T	foundpos;
13187     pos_T	save_cursor;
13188     pos_T	save_pos;
13189     int		n;
13190     int		r;
13191     int		nest = 1;
13192     int		err;
13193 
13194     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13195     save_cpo = p_cpo;
13196     p_cpo = (char_u *)"";
13197 
13198     /* Make two search patterns: start/end (pat2, for in nested pairs) and
13199      * start/middle/end (pat3, for the top pair). */
13200     pat2 = alloc((unsigned)(STRLEN(spat) + STRLEN(epat) + 15));
13201     pat3 = alloc((unsigned)(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 23));
13202     if (pat2 == NULL || pat3 == NULL)
13203 	goto theend;
13204     sprintf((char *)pat2, "\\(%s\\m\\)\\|\\(%s\\m\\)", spat, epat);
13205     if (*mpat == NUL)
13206 	STRCPY(pat3, pat2);
13207     else
13208 	sprintf((char *)pat3, "\\(%s\\m\\)\\|\\(%s\\m\\)\\|\\(%s\\m\\)",
13209 							    spat, epat, mpat);
13210 
13211     save_cursor = curwin->w_cursor;
13212     pos = curwin->w_cursor;
13213     firstpos.lnum = 0;
13214     foundpos.lnum = 0;
13215     pat = pat3;
13216     for (;;)
13217     {
13218 	n = searchit(curwin, curbuf, &pos, dir, pat, 1L,
13219 						      SEARCH_KEEP, RE_SEARCH);
13220 	if (n == FAIL || (firstpos.lnum != 0 && equalpos(pos, firstpos)))
13221 	    /* didn't find it or found the first match again: FAIL */
13222 	    break;
13223 
13224 	if (firstpos.lnum == 0)
13225 	    firstpos = pos;
13226 	if (equalpos(pos, foundpos))
13227 	{
13228 	    /* Found the same position again.  Can happen with a pattern that
13229 	     * has "\zs" at the end and searching backwards.  Advance one
13230 	     * character and try again. */
13231 	    if (dir == BACKWARD)
13232 		decl(&pos);
13233 	    else
13234 		incl(&pos);
13235 	}
13236 	foundpos = pos;
13237 
13238 	/* If the skip pattern matches, ignore this match. */
13239 	if (*skip != NUL)
13240 	{
13241 	    save_pos = curwin->w_cursor;
13242 	    curwin->w_cursor = pos;
13243 	    r = eval_to_bool(skip, &err, NULL, FALSE);
13244 	    curwin->w_cursor = save_pos;
13245 	    if (err)
13246 	    {
13247 		/* Evaluating {skip} caused an error, break here. */
13248 		curwin->w_cursor = save_cursor;
13249 		retval = -1;
13250 		break;
13251 	    }
13252 	    if (r)
13253 		continue;
13254 	}
13255 
13256 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
13257 	{
13258 	    /* Found end when searching backwards or start when searching
13259 	     * forward: nested pair. */
13260 	    ++nest;
13261 	    pat = pat2;		/* nested, don't search for middle */
13262 	}
13263 	else
13264 	{
13265 	    /* Found end when searching forward or start when searching
13266 	     * backward: end of (nested) pair; or found middle in outer pair. */
13267 	    if (--nest == 1)
13268 		pat = pat3;	/* outer level, search for middle */
13269 	}
13270 
13271 	if (nest == 0)
13272 	{
13273 	    /* Found the match: return matchcount or line number. */
13274 	    if (flags & SP_RETCOUNT)
13275 		++retval;
13276 	    else
13277 		retval = pos.lnum;
13278 	    if (flags & SP_SETPCMARK)
13279 		setpcmark();
13280 	    curwin->w_cursor = pos;
13281 	    if (!(flags & SP_REPEAT))
13282 		break;
13283 	    nest = 1;	    /* search for next unmatched */
13284 	}
13285     }
13286 
13287     /* If 'n' flag is used or search failed: restore cursor position. */
13288     if ((flags & SP_NOMOVE) || retval == 0)
13289 	curwin->w_cursor = save_cursor;
13290 
13291 theend:
13292     vim_free(pat2);
13293     vim_free(pat3);
13294     p_cpo = save_cpo;
13295 
13296     return retval;
13297 }
13298 
13299 /*ARGSUSED*/
13300     static void
13301 f_server2client(argvars, rettv)
13302     typval_T	*argvars;
13303     typval_T	*rettv;
13304 {
13305 #ifdef FEAT_CLIENTSERVER
13306     char_u	buf[NUMBUFLEN];
13307     char_u	*server = get_tv_string_chk(&argvars[0]);
13308     char_u	*reply = get_tv_string_buf_chk(&argvars[1], buf);
13309 
13310     rettv->vval.v_number = -1;
13311     if (server == NULL || reply == NULL)
13312 	return;
13313     if (check_restricted() || check_secure())
13314 	return;
13315 # ifdef FEAT_X11
13316     if (check_connection() == FAIL)
13317 	return;
13318 # endif
13319 
13320     if (serverSendReply(server, reply) < 0)
13321     {
13322 	EMSG(_("E258: Unable to send to client"));
13323 	return;
13324     }
13325     rettv->vval.v_number = 0;
13326 #else
13327     rettv->vval.v_number = -1;
13328 #endif
13329 }
13330 
13331 /*ARGSUSED*/
13332     static void
13333 f_serverlist(argvars, rettv)
13334     typval_T	*argvars;
13335     typval_T	*rettv;
13336 {
13337     char_u	*r = NULL;
13338 
13339 #ifdef FEAT_CLIENTSERVER
13340 # ifdef WIN32
13341     r = serverGetVimNames();
13342 # else
13343     make_connection();
13344     if (X_DISPLAY != NULL)
13345 	r = serverGetVimNames(X_DISPLAY);
13346 # endif
13347 #endif
13348     rettv->v_type = VAR_STRING;
13349     rettv->vval.v_string = r;
13350 }
13351 
13352 /*
13353  * "setbufvar()" function
13354  */
13355 /*ARGSUSED*/
13356     static void
13357 f_setbufvar(argvars, rettv)
13358     typval_T	*argvars;
13359     typval_T	*rettv;
13360 {
13361     buf_T	*buf;
13362 #ifdef FEAT_AUTOCMD
13363     aco_save_T	aco;
13364 #else
13365     buf_T	*save_curbuf;
13366 #endif
13367     char_u	*varname, *bufvarname;
13368     typval_T	*varp;
13369     char_u	nbuf[NUMBUFLEN];
13370 
13371     rettv->vval.v_number = 0;
13372 
13373     if (check_restricted() || check_secure())
13374 	return;
13375     (void)get_tv_number(&argvars[0]);	    /* issue errmsg if type error */
13376     varname = get_tv_string_chk(&argvars[1]);
13377     buf = get_buf_tv(&argvars[0]);
13378     varp = &argvars[2];
13379 
13380     if (buf != NULL && varname != NULL && varp != NULL)
13381     {
13382 	/* set curbuf to be our buf, temporarily */
13383 #ifdef FEAT_AUTOCMD
13384 	aucmd_prepbuf(&aco, buf);
13385 #else
13386 	save_curbuf = curbuf;
13387 	curbuf = buf;
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 	    bufvarname = alloc((unsigned)STRLEN(varname) + 3);
13405 	    if (bufvarname != NULL)
13406 	    {
13407 		STRCPY(bufvarname, "b:");
13408 		STRCPY(bufvarname + 2, varname);
13409 		set_var(bufvarname, varp, TRUE);
13410 		vim_free(bufvarname);
13411 	    }
13412 	}
13413 
13414 	/* reset notion of buffer */
13415 #ifdef FEAT_AUTOCMD
13416 	aucmd_restbuf(&aco);
13417 #else
13418 	curbuf = save_curbuf;
13419 #endif
13420     }
13421 }
13422 
13423 /*
13424  * "setcmdpos()" function
13425  */
13426     static void
13427 f_setcmdpos(argvars, rettv)
13428     typval_T	*argvars;
13429     typval_T	*rettv;
13430 {
13431     int		pos = (int)get_tv_number(&argvars[0]) - 1;
13432 
13433     if (pos >= 0)
13434 	rettv->vval.v_number = set_cmdline_pos(pos);
13435 }
13436 
13437 /*
13438  * "setline()" function
13439  */
13440     static void
13441 f_setline(argvars, rettv)
13442     typval_T	*argvars;
13443     typval_T	*rettv;
13444 {
13445     linenr_T	lnum;
13446     char_u	*line = NULL;
13447     list_T	*l = NULL;
13448     listitem_T	*li = NULL;
13449     long	added = 0;
13450     linenr_T	lcount = curbuf->b_ml.ml_line_count;
13451 
13452     lnum = get_tv_lnum(&argvars[0]);
13453     if (argvars[1].v_type == VAR_LIST)
13454     {
13455 	l = argvars[1].vval.v_list;
13456 	li = l->lv_first;
13457     }
13458     else
13459 	line = get_tv_string_chk(&argvars[1]);
13460 
13461     rettv->vval.v_number = 0;		/* OK */
13462     for (;;)
13463     {
13464 	if (l != NULL)
13465 	{
13466 	    /* list argument, get next string */
13467 	    if (li == NULL)
13468 		break;
13469 	    line = get_tv_string_chk(&li->li_tv);
13470 	    li = li->li_next;
13471 	}
13472 
13473 	rettv->vval.v_number = 1;	/* FAIL */
13474 	if (line == NULL || lnum < 1 || lnum > curbuf->b_ml.ml_line_count + 1)
13475 	    break;
13476 	if (lnum <= curbuf->b_ml.ml_line_count)
13477 	{
13478 	    /* existing line, replace it */
13479 	    if (u_savesub(lnum) == OK && ml_replace(lnum, line, TRUE) == OK)
13480 	    {
13481 		changed_bytes(lnum, 0);
13482 		check_cursor_col();
13483 		rettv->vval.v_number = 0;	/* OK */
13484 	    }
13485 	}
13486 	else if (added > 0 || u_save(lnum - 1, lnum) == OK)
13487 	{
13488 	    /* lnum is one past the last line, append the line */
13489 	    ++added;
13490 	    if (ml_append(lnum - 1, line, (colnr_T)0, FALSE) == OK)
13491 		rettv->vval.v_number = 0;	/* OK */
13492 	}
13493 
13494 	if (l == NULL)			/* only one string argument */
13495 	    break;
13496 	++lnum;
13497     }
13498 
13499     if (added > 0)
13500 	appended_lines_mark(lcount, added);
13501 }
13502 
13503 /*
13504  * "setqflist()" function
13505  */
13506 /*ARGSUSED*/
13507     static void
13508 f_setqflist(argvars, rettv)
13509     typval_T	*argvars;
13510     typval_T	*rettv;
13511 {
13512     char_u	*act;
13513     int		action = ' ';
13514 
13515     rettv->vval.v_number = -1;
13516 
13517 #ifdef FEAT_QUICKFIX
13518     if (argvars[0].v_type != VAR_LIST)
13519 	EMSG(_(e_listreq));
13520     else
13521     {
13522 	list_T  *l = argvars[0].vval.v_list;
13523 
13524 	if (argvars[1].v_type == VAR_STRING)
13525 	{
13526 	    act = get_tv_string_chk(&argvars[1]);
13527 	    if (act == NULL)
13528 		return;		/* type error; errmsg already given */
13529 	    if (*act == 'a' || *act == 'r')
13530 		action = *act;
13531 	}
13532 
13533 	if (l != NULL && set_errorlist(l, action) == OK)
13534 	    rettv->vval.v_number = 0;
13535     }
13536 #endif
13537 }
13538 
13539 /*
13540  * "setreg()" function
13541  */
13542     static void
13543 f_setreg(argvars, rettv)
13544     typval_T	*argvars;
13545     typval_T	*rettv;
13546 {
13547     int		regname;
13548     char_u	*strregname;
13549     char_u	*stropt;
13550     char_u	*strval;
13551     int		append;
13552     char_u	yank_type;
13553     long	block_len;
13554 
13555     block_len = -1;
13556     yank_type = MAUTO;
13557     append = FALSE;
13558 
13559     strregname = get_tv_string_chk(argvars);
13560     rettv->vval.v_number = 1;		/* FAIL is default */
13561 
13562     if (strregname == NULL)
13563 	return;		/* type error; errmsg already given */
13564     regname = *strregname;
13565     if (regname == 0 || regname == '@')
13566 	regname = '"';
13567     else if (regname == '=')
13568 	return;
13569 
13570     if (argvars[2].v_type != VAR_UNKNOWN)
13571     {
13572 	stropt = get_tv_string_chk(&argvars[2]);
13573 	if (stropt == NULL)
13574 	    return;		/* type error */
13575 	for (; *stropt != NUL; ++stropt)
13576 	    switch (*stropt)
13577 	    {
13578 		case 'a': case 'A':	/* append */
13579 		    append = TRUE;
13580 		    break;
13581 		case 'v': case 'c':	/* character-wise selection */
13582 		    yank_type = MCHAR;
13583 		    break;
13584 		case 'V': case 'l':	/* line-wise selection */
13585 		    yank_type = MLINE;
13586 		    break;
13587 #ifdef FEAT_VISUAL
13588 		case 'b': case Ctrl_V:	/* block-wise selection */
13589 		    yank_type = MBLOCK;
13590 		    if (VIM_ISDIGIT(stropt[1]))
13591 		    {
13592 			++stropt;
13593 			block_len = getdigits(&stropt) - 1;
13594 			--stropt;
13595 		    }
13596 		    break;
13597 #endif
13598 	    }
13599     }
13600 
13601     strval = get_tv_string_chk(&argvars[1]);
13602     if (strval != NULL)
13603 	write_reg_contents_ex(regname, strval, -1,
13604 						append, yank_type, block_len);
13605     rettv->vval.v_number = 0;
13606 }
13607 
13608 
13609 /*
13610  * "setwinvar(expr)" function
13611  */
13612 /*ARGSUSED*/
13613     static void
13614 f_setwinvar(argvars, rettv)
13615     typval_T	*argvars;
13616     typval_T	*rettv;
13617 {
13618     win_T	*win;
13619 #ifdef FEAT_WINDOWS
13620     win_T	*save_curwin;
13621 #endif
13622     char_u	*varname, *winvarname;
13623     typval_T	*varp;
13624     char_u	nbuf[NUMBUFLEN];
13625 
13626     rettv->vval.v_number = 0;
13627 
13628     if (check_restricted() || check_secure())
13629 	return;
13630     win = find_win_by_nr(&argvars[0]);
13631     varname = get_tv_string_chk(&argvars[1]);
13632     varp = &argvars[2];
13633 
13634     if (win != NULL && varname != NULL && varp != NULL)
13635     {
13636 #ifdef FEAT_WINDOWS
13637 	/* set curwin to be our win, temporarily */
13638 	save_curwin = curwin;
13639 	curwin = win;
13640 	curbuf = curwin->w_buffer;
13641 #endif
13642 
13643 	if (*varname == '&')
13644 	{
13645 	    long	numval;
13646 	    char_u	*strval;
13647 	    int		error = FALSE;
13648 
13649 	    ++varname;
13650 	    numval = get_tv_number_chk(varp, &error);
13651 	    strval = get_tv_string_buf_chk(varp, nbuf);
13652 	    if (!error && strval != NULL)
13653 		set_option_value(varname, numval, strval, OPT_LOCAL);
13654 	}
13655 	else
13656 	{
13657 	    winvarname = alloc((unsigned)STRLEN(varname) + 3);
13658 	    if (winvarname != NULL)
13659 	    {
13660 		STRCPY(winvarname, "w:");
13661 		STRCPY(winvarname + 2, varname);
13662 		set_var(winvarname, varp, TRUE);
13663 		vim_free(winvarname);
13664 	    }
13665 	}
13666 
13667 #ifdef FEAT_WINDOWS
13668 	/* Restore current window, if it's still valid (autocomands can make
13669 	 * it invalid). */
13670 	if (win_valid(save_curwin))
13671 	{
13672 	    curwin = save_curwin;
13673 	    curbuf = curwin->w_buffer;
13674 	}
13675 #endif
13676     }
13677 }
13678 
13679 /*
13680  * "simplify()" function
13681  */
13682     static void
13683 f_simplify(argvars, rettv)
13684     typval_T	*argvars;
13685     typval_T	*rettv;
13686 {
13687     char_u	*p;
13688 
13689     p = get_tv_string(&argvars[0]);
13690     rettv->vval.v_string = vim_strsave(p);
13691     simplify_filename(rettv->vval.v_string);	/* simplify in place */
13692     rettv->v_type = VAR_STRING;
13693 }
13694 
13695 static int
13696 #ifdef __BORLANDC__
13697     _RTLENTRYF
13698 #endif
13699 	item_compare __ARGS((const void *s1, const void *s2));
13700 static int
13701 #ifdef __BORLANDC__
13702     _RTLENTRYF
13703 #endif
13704 	item_compare2 __ARGS((const void *s1, const void *s2));
13705 
13706 static int	item_compare_ic;
13707 static char_u	*item_compare_func;
13708 static int	item_compare_func_err;
13709 #define ITEM_COMPARE_FAIL 999
13710 
13711 /*
13712  * Compare functions for f_sort() below.
13713  */
13714     static int
13715 #ifdef __BORLANDC__
13716 _RTLENTRYF
13717 #endif
13718 item_compare(s1, s2)
13719     const void	*s1;
13720     const void	*s2;
13721 {
13722     char_u	*p1, *p2;
13723     char_u	*tofree1, *tofree2;
13724     int		res;
13725     char_u	numbuf1[NUMBUFLEN];
13726     char_u	numbuf2[NUMBUFLEN];
13727 
13728     p1 = tv2string(&(*(listitem_T **)s1)->li_tv, &tofree1, numbuf1);
13729     p2 = tv2string(&(*(listitem_T **)s2)->li_tv, &tofree2, numbuf2);
13730     if (item_compare_ic)
13731 	res = STRICMP(p1, p2);
13732     else
13733 	res = STRCMP(p1, p2);
13734     vim_free(tofree1);
13735     vim_free(tofree2);
13736     return res;
13737 }
13738 
13739     static int
13740 #ifdef __BORLANDC__
13741 _RTLENTRYF
13742 #endif
13743 item_compare2(s1, s2)
13744     const void	*s1;
13745     const void	*s2;
13746 {
13747     int		res;
13748     typval_T	rettv;
13749     typval_T	argv[2];
13750     int		dummy;
13751 
13752     /* shortcut after failure in previous call; compare all items equal */
13753     if (item_compare_func_err)
13754 	return 0;
13755 
13756     /* copy the values.  This is needed to be able to set v_lock to VAR_FIXED
13757      * in the copy without changing the original list items. */
13758     copy_tv(&(*(listitem_T **)s1)->li_tv, &argv[0]);
13759     copy_tv(&(*(listitem_T **)s2)->li_tv, &argv[1]);
13760 
13761     rettv.v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
13762     res = call_func(item_compare_func, STRLEN(item_compare_func),
13763 				 &rettv, 2, argv, 0L, 0L, &dummy, TRUE, NULL);
13764     clear_tv(&argv[0]);
13765     clear_tv(&argv[1]);
13766 
13767     if (res == FAIL)
13768 	res = ITEM_COMPARE_FAIL;
13769     else
13770 	/* return value has wrong type */
13771 	res = get_tv_number_chk(&rettv, &item_compare_func_err);
13772     if (item_compare_func_err)
13773 	res = ITEM_COMPARE_FAIL;
13774     clear_tv(&rettv);
13775     return res;
13776 }
13777 
13778 /*
13779  * "sort({list})" function
13780  */
13781     static void
13782 f_sort(argvars, rettv)
13783     typval_T	*argvars;
13784     typval_T	*rettv;
13785 {
13786     list_T	*l;
13787     listitem_T	*li;
13788     listitem_T	**ptrs;
13789     long	len;
13790     long	i;
13791 
13792     rettv->vval.v_number = 0;
13793     if (argvars[0].v_type != VAR_LIST)
13794 	EMSG2(_(e_listarg), "sort()");
13795     else
13796     {
13797 	l = argvars[0].vval.v_list;
13798 	if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
13799 	    return;
13800 	rettv->vval.v_list = l;
13801 	rettv->v_type = VAR_LIST;
13802 	++l->lv_refcount;
13803 
13804 	len = list_len(l);
13805 	if (len <= 1)
13806 	    return;	/* short list sorts pretty quickly */
13807 
13808 	item_compare_ic = FALSE;
13809 	item_compare_func = NULL;
13810 	if (argvars[1].v_type != VAR_UNKNOWN)
13811 	{
13812 	    if (argvars[1].v_type == VAR_FUNC)
13813 		item_compare_func = argvars[1].vval.v_string;
13814 	    else
13815 	    {
13816 		int	    error = FALSE;
13817 
13818 		i = get_tv_number_chk(&argvars[1], &error);
13819 		if (error)
13820 		    return;		/* type error; errmsg already given */
13821 		if (i == 1)
13822 		    item_compare_ic = TRUE;
13823 		else
13824 		    item_compare_func = get_tv_string(&argvars[1]);
13825 	    }
13826 	}
13827 
13828 	/* Make an array with each entry pointing to an item in the List. */
13829 	ptrs = (listitem_T **)alloc((int)(len * sizeof(listitem_T *)));
13830 	if (ptrs == NULL)
13831 	    return;
13832 	i = 0;
13833 	for (li = l->lv_first; li != NULL; li = li->li_next)
13834 	    ptrs[i++] = li;
13835 
13836 	item_compare_func_err = FALSE;
13837 	/* test the compare function */
13838 	if (item_compare_func != NULL
13839 		&& item_compare2((void *)&ptrs[0], (void *)&ptrs[1])
13840 							 == ITEM_COMPARE_FAIL)
13841 	    EMSG(_("E702: Sort compare function failed"));
13842 	else
13843 	{
13844 	    /* Sort the array with item pointers. */
13845 	    qsort((void *)ptrs, (size_t)len, sizeof(listitem_T *),
13846 		    item_compare_func == NULL ? item_compare : item_compare2);
13847 
13848 	    if (!item_compare_func_err)
13849 	    {
13850 		/* Clear the List and append the items in the sorted order. */
13851 		l->lv_first = l->lv_last = NULL;
13852 		l->lv_len = 0;
13853 		for (i = 0; i < len; ++i)
13854 		    list_append(l, ptrs[i]);
13855 	    }
13856 	}
13857 
13858 	vim_free(ptrs);
13859     }
13860 }
13861 
13862 /*
13863  * "soundfold({word})" function
13864  */
13865     static void
13866 f_soundfold(argvars, rettv)
13867     typval_T	*argvars;
13868     typval_T	*rettv;
13869 {
13870     char_u	*s;
13871 
13872     rettv->v_type = VAR_STRING;
13873     s = get_tv_string(&argvars[0]);
13874 #ifdef FEAT_SYN_HL
13875     rettv->vval.v_string = eval_soundfold(s);
13876 #else
13877     rettv->vval.v_string = vim_strsave(s);
13878 #endif
13879 }
13880 
13881 /*
13882  * "spellbadword()" function
13883  */
13884 /* ARGSUSED */
13885     static void
13886 f_spellbadword(argvars, rettv)
13887     typval_T	*argvars;
13888     typval_T	*rettv;
13889 {
13890     int		len;
13891 
13892     rettv->vval.v_string = NULL;
13893     rettv->v_type = VAR_STRING;
13894 
13895 #ifdef FEAT_SYN_HL
13896     /* Find the start and length of the badly spelled word. */
13897     len = spell_move_to(curwin, FORWARD, TRUE, TRUE, NULL);
13898     if (len != 0)
13899 	rettv->vval.v_string = vim_strnsave(ml_get_cursor(), len);
13900 #endif
13901 }
13902 
13903 /*
13904  * "spellsuggest()" function
13905  */
13906     static void
13907 f_spellsuggest(argvars, rettv)
13908     typval_T	*argvars;
13909     typval_T	*rettv;
13910 {
13911     char_u	*str;
13912     int		maxcount;
13913     garray_T	ga;
13914     list_T	*l;
13915     listitem_T	*li;
13916     int		i;
13917 
13918     l = list_alloc();
13919     if (l == NULL)
13920 	return;
13921     rettv->v_type = VAR_LIST;
13922     rettv->vval.v_list = l;
13923     ++l->lv_refcount;
13924 
13925 #ifdef FEAT_SYN_HL
13926     if (curwin->w_p_spell && *curbuf->b_p_spl != NUL)
13927     {
13928 	str = get_tv_string(&argvars[0]);
13929 	if (argvars[1].v_type != VAR_UNKNOWN)
13930 	{
13931 	    maxcount = get_tv_number(&argvars[1]);
13932 	    if (maxcount <= 0)
13933 		return;
13934 	}
13935 	else
13936 	    maxcount = 25;
13937 
13938 	spell_suggest_list(&ga, str, maxcount, FALSE);
13939 
13940 	for (i = 0; i < ga.ga_len; ++i)
13941 	{
13942 	    str = ((char_u **)ga.ga_data)[i];
13943 
13944 	    li = listitem_alloc();
13945 	    if (li == NULL)
13946 		vim_free(str);
13947 	    else
13948 	    {
13949 		li->li_tv.v_type = VAR_STRING;
13950 		li->li_tv.v_lock = 0;
13951 		li->li_tv.vval.v_string = str;
13952 		list_append(l, li);
13953 	    }
13954 	}
13955 	ga_clear(&ga);
13956     }
13957 #endif
13958 }
13959 
13960     static void
13961 f_split(argvars, rettv)
13962     typval_T	*argvars;
13963     typval_T	*rettv;
13964 {
13965     char_u	*str;
13966     char_u	*end;
13967     char_u	*pat = NULL;
13968     regmatch_T	regmatch;
13969     char_u	patbuf[NUMBUFLEN];
13970     char_u	*save_cpo;
13971     int		match;
13972     listitem_T	*ni;
13973     list_T	*l;
13974     colnr_T	col = 0;
13975     int		keepempty = FALSE;
13976     int		typeerr = FALSE;
13977 
13978     /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
13979     save_cpo = p_cpo;
13980     p_cpo = (char_u *)"";
13981 
13982     str = get_tv_string(&argvars[0]);
13983     if (argvars[1].v_type != VAR_UNKNOWN)
13984     {
13985 	pat = get_tv_string_buf_chk(&argvars[1], patbuf);
13986 	if (pat == NULL)
13987 	    typeerr = TRUE;
13988 	if (argvars[2].v_type != VAR_UNKNOWN)
13989 	    keepempty = get_tv_number_chk(&argvars[2], &typeerr);
13990     }
13991     if (pat == NULL || *pat == NUL)
13992 	pat = (char_u *)"[\\x01- ]\\+";
13993 
13994     l = list_alloc();
13995     if (l == NULL)
13996 	return;
13997     rettv->v_type = VAR_LIST;
13998     rettv->vval.v_list = l;
13999     ++l->lv_refcount;
14000     if (typeerr)
14001 	return;
14002 
14003     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
14004     if (regmatch.regprog != NULL)
14005     {
14006 	regmatch.rm_ic = FALSE;
14007 	while (*str != NUL || keepempty)
14008 	{
14009 	    if (*str == NUL)
14010 		match = FALSE;	/* empty item at the end */
14011 	    else
14012 		match = vim_regexec_nl(&regmatch, str, col);
14013 	    if (match)
14014 		end = regmatch.startp[0];
14015 	    else
14016 		end = str + STRLEN(str);
14017 	    if (keepempty || end > str || (l->lv_len > 0 && *str != NUL
14018 					  && match && end < regmatch.endp[0]))
14019 	    {
14020 		ni = listitem_alloc();
14021 		if (ni == NULL)
14022 		    break;
14023 		ni->li_tv.v_type = VAR_STRING;
14024 		ni->li_tv.v_lock = 0;
14025 		ni->li_tv.vval.v_string = vim_strnsave(str, end - str);
14026 		list_append(l, ni);
14027 	    }
14028 	    if (!match)
14029 		break;
14030 	    /* Advance to just after the match. */
14031 	    if (regmatch.endp[0] > str)
14032 		col = 0;
14033 	    else
14034 	    {
14035 		/* Don't get stuck at the same match. */
14036 #ifdef FEAT_MBYTE
14037 		col = (*mb_ptr2len)(regmatch.endp[0]);
14038 #else
14039 		col = 1;
14040 #endif
14041 	    }
14042 	    str = regmatch.endp[0];
14043 	}
14044 
14045 	vim_free(regmatch.regprog);
14046     }
14047 
14048     p_cpo = save_cpo;
14049 }
14050 
14051 #ifdef HAVE_STRFTIME
14052 /*
14053  * "strftime({format}[, {time}])" function
14054  */
14055     static void
14056 f_strftime(argvars, rettv)
14057     typval_T	*argvars;
14058     typval_T	*rettv;
14059 {
14060     char_u	result_buf[256];
14061     struct tm	*curtime;
14062     time_t	seconds;
14063     char_u	*p;
14064 
14065     rettv->v_type = VAR_STRING;
14066 
14067     p = get_tv_string(&argvars[0]);
14068     if (argvars[1].v_type == VAR_UNKNOWN)
14069 	seconds = time(NULL);
14070     else
14071 	seconds = (time_t)get_tv_number(&argvars[1]);
14072     curtime = localtime(&seconds);
14073     /* MSVC returns NULL for an invalid value of seconds. */
14074     if (curtime == NULL)
14075 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
14076     else
14077     {
14078 # ifdef FEAT_MBYTE
14079 	vimconv_T   conv;
14080 	char_u	    *enc;
14081 
14082 	conv.vc_type = CONV_NONE;
14083 	enc = enc_locale();
14084 	convert_setup(&conv, p_enc, enc);
14085 	if (conv.vc_type != CONV_NONE)
14086 	    p = string_convert(&conv, p, NULL);
14087 # endif
14088 	if (p != NULL)
14089 	    (void)strftime((char *)result_buf, sizeof(result_buf),
14090 							  (char *)p, curtime);
14091 	else
14092 	    result_buf[0] = NUL;
14093 
14094 # ifdef FEAT_MBYTE
14095 	if (conv.vc_type != CONV_NONE)
14096 	    vim_free(p);
14097 	convert_setup(&conv, enc, p_enc);
14098 	if (conv.vc_type != CONV_NONE)
14099 	    rettv->vval.v_string = string_convert(&conv, result_buf, NULL);
14100 	else
14101 # endif
14102 	    rettv->vval.v_string = vim_strsave(result_buf);
14103 
14104 # ifdef FEAT_MBYTE
14105 	/* Release conversion descriptors */
14106 	convert_setup(&conv, NULL, NULL);
14107 	vim_free(enc);
14108 # endif
14109     }
14110 }
14111 #endif
14112 
14113 /*
14114  * "stridx()" function
14115  */
14116     static void
14117 f_stridx(argvars, rettv)
14118     typval_T	*argvars;
14119     typval_T	*rettv;
14120 {
14121     char_u	buf[NUMBUFLEN];
14122     char_u	*needle;
14123     char_u	*haystack;
14124     char_u	*save_haystack;
14125     char_u	*pos;
14126     int		start_idx;
14127 
14128     needle = get_tv_string_chk(&argvars[1]);
14129     save_haystack = haystack = get_tv_string_buf_chk(&argvars[0], buf);
14130     rettv->vval.v_number = -1;
14131     if (needle == NULL || haystack == NULL)
14132 	return;		/* type error; errmsg already given */
14133 
14134     if (argvars[2].v_type != VAR_UNKNOWN)
14135     {
14136 	int	    error = FALSE;
14137 
14138 	start_idx = get_tv_number_chk(&argvars[2], &error);
14139 	if (error || start_idx >= (int)STRLEN(haystack))
14140 	    return;
14141 	if (start_idx >= 0)
14142 	    haystack += start_idx;
14143     }
14144 
14145     pos	= (char_u *)strstr((char *)haystack, (char *)needle);
14146     if (pos != NULL)
14147 	rettv->vval.v_number = (varnumber_T)(pos - save_haystack);
14148 }
14149 
14150 /*
14151  * "string()" function
14152  */
14153     static void
14154 f_string(argvars, rettv)
14155     typval_T	*argvars;
14156     typval_T	*rettv;
14157 {
14158     char_u	*tofree;
14159     char_u	numbuf[NUMBUFLEN];
14160 
14161     rettv->v_type = VAR_STRING;
14162     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf);
14163     if (tofree == NULL)
14164 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
14165 }
14166 
14167 /*
14168  * "strlen()" function
14169  */
14170     static void
14171 f_strlen(argvars, rettv)
14172     typval_T	*argvars;
14173     typval_T	*rettv;
14174 {
14175     rettv->vval.v_number = (varnumber_T)(STRLEN(
14176 					      get_tv_string(&argvars[0])));
14177 }
14178 
14179 /*
14180  * "strpart()" function
14181  */
14182     static void
14183 f_strpart(argvars, rettv)
14184     typval_T	*argvars;
14185     typval_T	*rettv;
14186 {
14187     char_u	*p;
14188     int		n;
14189     int		len;
14190     int		slen;
14191     int		error = FALSE;
14192 
14193     p = get_tv_string(&argvars[0]);
14194     slen = (int)STRLEN(p);
14195 
14196     n = get_tv_number_chk(&argvars[1], &error);
14197     if (error)
14198 	len = 0;
14199     else if (argvars[2].v_type != VAR_UNKNOWN)
14200 	len = get_tv_number(&argvars[2]);
14201     else
14202 	len = slen - n;	    /* default len: all bytes that are available. */
14203 
14204     /*
14205      * Only return the overlap between the specified part and the actual
14206      * string.
14207      */
14208     if (n < 0)
14209     {
14210 	len += n;
14211 	n = 0;
14212     }
14213     else if (n > slen)
14214 	n = slen;
14215     if (len < 0)
14216 	len = 0;
14217     else if (n + len > slen)
14218 	len = slen - n;
14219 
14220     rettv->v_type = VAR_STRING;
14221     rettv->vval.v_string = vim_strnsave(p + n, len);
14222 }
14223 
14224 /*
14225  * "strridx()" function
14226  */
14227     static void
14228 f_strridx(argvars, rettv)
14229     typval_T	*argvars;
14230     typval_T	*rettv;
14231 {
14232     char_u	buf[NUMBUFLEN];
14233     char_u	*needle;
14234     char_u	*haystack;
14235     char_u	*rest;
14236     char_u	*lastmatch = NULL;
14237     int		haystack_len, end_idx;
14238 
14239     needle = get_tv_string_chk(&argvars[1]);
14240     haystack = get_tv_string_buf_chk(&argvars[0], buf);
14241     haystack_len = STRLEN(haystack);
14242 
14243     rettv->vval.v_number = -1;
14244     if (needle == NULL || haystack == NULL)
14245 	return;		/* type error; errmsg already given */
14246     if (argvars[2].v_type != VAR_UNKNOWN)
14247     {
14248 	/* Third argument: upper limit for index */
14249 	end_idx = get_tv_number_chk(&argvars[2], NULL);
14250 	if (end_idx < 0)
14251 	    return;	/* can never find a match */
14252     }
14253     else
14254 	end_idx = haystack_len;
14255 
14256     if (*needle == NUL)
14257     {
14258 	/* Empty string matches past the end. */
14259 	lastmatch = haystack + end_idx;
14260     }
14261     else
14262     {
14263 	for (rest = haystack; *rest != '\0'; ++rest)
14264 	{
14265 	    rest = (char_u *)strstr((char *)rest, (char *)needle);
14266 	    if (rest == NULL || rest > haystack + end_idx)
14267 		break;
14268 	    lastmatch = rest;
14269 	}
14270     }
14271 
14272     if (lastmatch == NULL)
14273 	rettv->vval.v_number = -1;
14274     else
14275 	rettv->vval.v_number = (varnumber_T)(lastmatch - haystack);
14276 }
14277 
14278 /*
14279  * "strtrans()" function
14280  */
14281     static void
14282 f_strtrans(argvars, rettv)
14283     typval_T	*argvars;
14284     typval_T	*rettv;
14285 {
14286     rettv->v_type = VAR_STRING;
14287     rettv->vval.v_string = transstr(get_tv_string(&argvars[0]));
14288 }
14289 
14290 /*
14291  * "submatch()" function
14292  */
14293     static void
14294 f_submatch(argvars, rettv)
14295     typval_T	*argvars;
14296     typval_T	*rettv;
14297 {
14298     rettv->v_type = VAR_STRING;
14299     rettv->vval.v_string =
14300 		    reg_submatch((int)get_tv_number_chk(&argvars[0], NULL));
14301 }
14302 
14303 /*
14304  * "substitute()" function
14305  */
14306     static void
14307 f_substitute(argvars, rettv)
14308     typval_T	*argvars;
14309     typval_T	*rettv;
14310 {
14311     char_u	patbuf[NUMBUFLEN];
14312     char_u	subbuf[NUMBUFLEN];
14313     char_u	flagsbuf[NUMBUFLEN];
14314 
14315     char_u	*str = get_tv_string_chk(&argvars[0]);
14316     char_u	*pat = get_tv_string_buf_chk(&argvars[1], patbuf);
14317     char_u	*sub = get_tv_string_buf_chk(&argvars[2], subbuf);
14318     char_u	*flg = get_tv_string_buf_chk(&argvars[3], flagsbuf);
14319 
14320     rettv->v_type = VAR_STRING;
14321     if (str == NULL || pat == NULL || sub == NULL || flg == NULL)
14322 	rettv->vval.v_string = NULL;
14323     else
14324 	rettv->vval.v_string = do_string_sub(str, pat, sub, flg);
14325 }
14326 
14327 /*
14328  * "synID(lnum, col, trans)" function
14329  */
14330 /*ARGSUSED*/
14331     static void
14332 f_synID(argvars, rettv)
14333     typval_T	*argvars;
14334     typval_T	*rettv;
14335 {
14336     int		id = 0;
14337 #ifdef FEAT_SYN_HL
14338     long	lnum;
14339     long	col;
14340     int		trans;
14341     int		transerr = FALSE;
14342 
14343     lnum = get_tv_lnum(argvars);		/* -1 on type error */
14344     col = get_tv_number(&argvars[1]) - 1;	/* -1 on type error */
14345     trans = get_tv_number_chk(&argvars[2], &transerr);
14346 
14347     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
14348 	    && col >= 0 && col < (long)STRLEN(ml_get(lnum)))
14349 	id = syn_get_id(curwin, lnum, (colnr_T)col, trans, NULL);
14350 #endif
14351 
14352     rettv->vval.v_number = id;
14353 }
14354 
14355 /*
14356  * "synIDattr(id, what [, mode])" function
14357  */
14358 /*ARGSUSED*/
14359     static void
14360 f_synIDattr(argvars, rettv)
14361     typval_T	*argvars;
14362     typval_T	*rettv;
14363 {
14364     char_u	*p = NULL;
14365 #ifdef FEAT_SYN_HL
14366     int		id;
14367     char_u	*what;
14368     char_u	*mode;
14369     char_u	modebuf[NUMBUFLEN];
14370     int		modec;
14371 
14372     id = get_tv_number(&argvars[0]);
14373     what = get_tv_string(&argvars[1]);
14374     if (argvars[2].v_type != VAR_UNKNOWN)
14375     {
14376 	mode = get_tv_string_buf(&argvars[2], modebuf);
14377 	modec = TOLOWER_ASC(mode[0]);
14378 	if (modec != 't' && modec != 'c'
14379 #ifdef FEAT_GUI
14380 		&& modec != 'g'
14381 #endif
14382 		)
14383 	    modec = 0;	/* replace invalid with current */
14384     }
14385     else
14386     {
14387 #ifdef FEAT_GUI
14388 	if (gui.in_use)
14389 	    modec = 'g';
14390 	else
14391 #endif
14392 	    if (t_colors > 1)
14393 	    modec = 'c';
14394 	else
14395 	    modec = 't';
14396     }
14397 
14398 
14399     switch (TOLOWER_ASC(what[0]))
14400     {
14401 	case 'b':
14402 		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
14403 		    p = highlight_color(id, what, modec);
14404 		else					/* bold */
14405 		    p = highlight_has_attr(id, HL_BOLD, modec);
14406 		break;
14407 
14408 	case 'f':					/* fg[#] */
14409 		p = highlight_color(id, what, modec);
14410 		break;
14411 
14412 	case 'i':
14413 		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
14414 		    p = highlight_has_attr(id, HL_INVERSE, modec);
14415 		else					/* italic */
14416 		    p = highlight_has_attr(id, HL_ITALIC, modec);
14417 		break;
14418 
14419 	case 'n':					/* name */
14420 		p = get_highlight_name(NULL, id - 1);
14421 		break;
14422 
14423 	case 'r':					/* reverse */
14424 		p = highlight_has_attr(id, HL_INVERSE, modec);
14425 		break;
14426 
14427 	case 's':					/* standout */
14428 		p = highlight_has_attr(id, HL_STANDOUT, modec);
14429 		break;
14430 
14431 	case 'u':
14432 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
14433 							/* underline */
14434 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
14435 		else
14436 							/* undercurl */
14437 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
14438 		break;
14439     }
14440 
14441     if (p != NULL)
14442 	p = vim_strsave(p);
14443 #endif
14444     rettv->v_type = VAR_STRING;
14445     rettv->vval.v_string = p;
14446 }
14447 
14448 /*
14449  * "synIDtrans(id)" function
14450  */
14451 /*ARGSUSED*/
14452     static void
14453 f_synIDtrans(argvars, rettv)
14454     typval_T	*argvars;
14455     typval_T	*rettv;
14456 {
14457     int		id;
14458 
14459 #ifdef FEAT_SYN_HL
14460     id = get_tv_number(&argvars[0]);
14461 
14462     if (id > 0)
14463 	id = syn_get_final_id(id);
14464     else
14465 #endif
14466 	id = 0;
14467 
14468     rettv->vval.v_number = id;
14469 }
14470 
14471 /*
14472  * "system()" function
14473  */
14474     static void
14475 f_system(argvars, rettv)
14476     typval_T	*argvars;
14477     typval_T	*rettv;
14478 {
14479     char_u	*res = NULL;
14480     char_u	*p;
14481     char_u	*infile = NULL;
14482     char_u	buf[NUMBUFLEN];
14483     int		err = FALSE;
14484     FILE	*fd;
14485 
14486     if (argvars[1].v_type != VAR_UNKNOWN)
14487     {
14488 	/*
14489 	 * Write the string to a temp file, to be used for input of the shell
14490 	 * command.
14491 	 */
14492 	if ((infile = vim_tempname('i')) == NULL)
14493 	{
14494 	    EMSG(_(e_notmp));
14495 	    return;
14496 	}
14497 
14498 	fd = mch_fopen((char *)infile, WRITEBIN);
14499 	if (fd == NULL)
14500 	{
14501 	    EMSG2(_(e_notopen), infile);
14502 	    goto done;
14503 	}
14504 	p = get_tv_string_buf_chk(&argvars[1], buf);
14505 	if (p == NULL)
14506 	    goto done;		/* type error; errmsg already given */
14507 	if (fwrite(p, STRLEN(p), 1, fd) != 1)
14508 	    err = TRUE;
14509 	if (fclose(fd) != 0)
14510 	    err = TRUE;
14511 	if (err)
14512 	{
14513 	    EMSG(_("E677: Error writing temp file"));
14514 	    goto done;
14515 	}
14516     }
14517 
14518     res = get_cmd_output(get_tv_string(&argvars[0]), infile, SHELL_SILENT);
14519 
14520 #ifdef USE_CR
14521     /* translate <CR> into <NL> */
14522     if (res != NULL)
14523     {
14524 	char_u	*s;
14525 
14526 	for (s = res; *s; ++s)
14527 	{
14528 	    if (*s == CAR)
14529 		*s = NL;
14530 	}
14531     }
14532 #else
14533 # ifdef USE_CRNL
14534     /* translate <CR><NL> into <NL> */
14535     if (res != NULL)
14536     {
14537 	char_u	*s, *d;
14538 
14539 	d = res;
14540 	for (s = res; *s; ++s)
14541 	{
14542 	    if (s[0] == CAR && s[1] == NL)
14543 		++s;
14544 	    *d++ = *s;
14545 	}
14546 	*d = NUL;
14547     }
14548 # endif
14549 #endif
14550 
14551 done:
14552     if (infile != NULL)
14553     {
14554 	mch_remove(infile);
14555 	vim_free(infile);
14556     }
14557     rettv->v_type = VAR_STRING;
14558     rettv->vval.v_string = res;
14559 }
14560 
14561 /*
14562  * "tagfiles()" function
14563  */
14564 /*ARGSUSED*/
14565     static void
14566 f_tagfiles(argvars, rettv)
14567     typval_T	*argvars;
14568     typval_T	*rettv;
14569 {
14570     char_u	fname[MAXPATHL + 1];
14571     list_T	*l;
14572 
14573     l = list_alloc();
14574     if (l == NULL)
14575     {
14576 	rettv->vval.v_number = 0;
14577 	return;
14578     }
14579     rettv->vval.v_list = l;
14580     rettv->v_type = VAR_LIST;
14581     ++l->lv_refcount;
14582 
14583     get_tagfname(TRUE, NULL);
14584     for (;;)
14585 	if (get_tagfname(FALSE, fname) == FAIL
14586 		|| list_append_string(l, fname) == FAIL)
14587 	    break;
14588 }
14589 
14590 /*
14591  * "taglist()" function
14592  */
14593     static void
14594 f_taglist(argvars, rettv)
14595     typval_T  *argvars;
14596     typval_T  *rettv;
14597 {
14598     char_u  *tag_pattern;
14599     list_T  *l;
14600 
14601     tag_pattern = get_tv_string(&argvars[0]);
14602 
14603     rettv->vval.v_number = FALSE;
14604     if (*tag_pattern == NUL)
14605 	return;
14606 
14607     l = list_alloc();
14608     if (l != NULL)
14609     {
14610 	if (get_tags(l, tag_pattern) != FAIL)
14611 	{
14612 	    rettv->vval.v_list = l;
14613 	    rettv->v_type = VAR_LIST;
14614 	    ++l->lv_refcount;
14615 	}
14616 	else
14617 	    list_free(l);
14618     }
14619 }
14620 
14621 /*
14622  * "tempname()" function
14623  */
14624 /*ARGSUSED*/
14625     static void
14626 f_tempname(argvars, rettv)
14627     typval_T	*argvars;
14628     typval_T	*rettv;
14629 {
14630     static int	x = 'A';
14631 
14632     rettv->v_type = VAR_STRING;
14633     rettv->vval.v_string = vim_tempname(x);
14634 
14635     /* Advance 'x' to use A-Z and 0-9, so that there are at least 34 different
14636      * names.  Skip 'I' and 'O', they are used for shell redirection. */
14637     do
14638     {
14639 	if (x == 'Z')
14640 	    x = '0';
14641 	else if (x == '9')
14642 	    x = 'A';
14643 	else
14644 	{
14645 #ifdef EBCDIC
14646 	    if (x == 'I')
14647 		x = 'J';
14648 	    else if (x == 'R')
14649 		x = 'S';
14650 	    else
14651 #endif
14652 		++x;
14653 	}
14654     } while (x == 'I' || x == 'O');
14655 }
14656 
14657 /*
14658  * "test(list)" function: Just checking the walls...
14659  */
14660 /*ARGSUSED*/
14661     static void
14662 f_test(argvars, rettv)
14663     typval_T	*argvars;
14664     typval_T	*rettv;
14665 {
14666     /* Used for unit testing.  Change the code below to your liking. */
14667 #if 0
14668     listitem_T	*li;
14669     list_T	*l;
14670     char_u	*bad, *good;
14671 
14672     if (argvars[0].v_type != VAR_LIST)
14673 	return;
14674     l = argvars[0].vval.v_list;
14675     if (l == NULL)
14676 	return;
14677     li = l->lv_first;
14678     if (li == NULL)
14679 	return;
14680     bad = get_tv_string(&li->li_tv);
14681     li = li->li_next;
14682     if (li == NULL)
14683 	return;
14684     good = get_tv_string(&li->li_tv);
14685     rettv->vval.v_number = test_edit_score(bad, good);
14686 #endif
14687 }
14688 
14689 /*
14690  * "tolower(string)" function
14691  */
14692     static void
14693 f_tolower(argvars, rettv)
14694     typval_T	*argvars;
14695     typval_T	*rettv;
14696 {
14697     char_u	*p;
14698 
14699     p = vim_strsave(get_tv_string(&argvars[0]));
14700     rettv->v_type = VAR_STRING;
14701     rettv->vval.v_string = p;
14702 
14703     if (p != NULL)
14704 	while (*p != NUL)
14705 	{
14706 #ifdef FEAT_MBYTE
14707 	    int		l;
14708 
14709 	    if (enc_utf8)
14710 	    {
14711 		int c, lc;
14712 
14713 		c = utf_ptr2char(p);
14714 		lc = utf_tolower(c);
14715 		l = utf_ptr2len(p);
14716 		/* TODO: reallocate string when byte count changes. */
14717 		if (utf_char2len(lc) == l)
14718 		    utf_char2bytes(lc, p);
14719 		p += l;
14720 	    }
14721 	    else if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
14722 		p += l;		/* skip multi-byte character */
14723 	    else
14724 #endif
14725 	    {
14726 		*p = TOLOWER_LOC(*p); /* note that tolower() can be a macro */
14727 		++p;
14728 	    }
14729 	}
14730 }
14731 
14732 /*
14733  * "toupper(string)" function
14734  */
14735     static void
14736 f_toupper(argvars, rettv)
14737     typval_T	*argvars;
14738     typval_T	*rettv;
14739 {
14740     rettv->v_type = VAR_STRING;
14741     rettv->vval.v_string = strup_save(get_tv_string(&argvars[0]));
14742 }
14743 
14744 /*
14745  * "tr(string, fromstr, tostr)" function
14746  */
14747     static void
14748 f_tr(argvars, rettv)
14749     typval_T	*argvars;
14750     typval_T	*rettv;
14751 {
14752     char_u	*instr;
14753     char_u	*fromstr;
14754     char_u	*tostr;
14755     char_u	*p;
14756 #ifdef FEAT_MBYTE
14757     int		inlen;
14758     int		fromlen;
14759     int		tolen;
14760     int		idx;
14761     char_u	*cpstr;
14762     int		cplen;
14763     int		first = TRUE;
14764 #endif
14765     char_u	buf[NUMBUFLEN];
14766     char_u	buf2[NUMBUFLEN];
14767     garray_T	ga;
14768 
14769     instr = get_tv_string(&argvars[0]);
14770     fromstr = get_tv_string_buf_chk(&argvars[1], buf);
14771     tostr = get_tv_string_buf_chk(&argvars[2], buf2);
14772 
14773     /* Default return value: empty string. */
14774     rettv->v_type = VAR_STRING;
14775     rettv->vval.v_string = NULL;
14776     if (fromstr == NULL || tostr == NULL)
14777 	    return;		/* type error; errmsg already given */
14778     ga_init2(&ga, (int)sizeof(char), 80);
14779 
14780 #ifdef FEAT_MBYTE
14781     if (!has_mbyte)
14782 #endif
14783 	/* not multi-byte: fromstr and tostr must be the same length */
14784 	if (STRLEN(fromstr) != STRLEN(tostr))
14785 	{
14786 #ifdef FEAT_MBYTE
14787 error:
14788 #endif
14789 	    EMSG2(_(e_invarg2), fromstr);
14790 	    ga_clear(&ga);
14791 	    return;
14792 	}
14793 
14794     /* fromstr and tostr have to contain the same number of chars */
14795     while (*instr != NUL)
14796     {
14797 #ifdef FEAT_MBYTE
14798 	if (has_mbyte)
14799 	{
14800 	    inlen = (*mb_ptr2len)(instr);
14801 	    cpstr = instr;
14802 	    cplen = inlen;
14803 	    idx = 0;
14804 	    for (p = fromstr; *p != NUL; p += fromlen)
14805 	    {
14806 		fromlen = (*mb_ptr2len)(p);
14807 		if (fromlen == inlen && STRNCMP(instr, p, inlen) == 0)
14808 		{
14809 		    for (p = tostr; *p != NUL; p += tolen)
14810 		    {
14811 			tolen = (*mb_ptr2len)(p);
14812 			if (idx-- == 0)
14813 			{
14814 			    cplen = tolen;
14815 			    cpstr = p;
14816 			    break;
14817 			}
14818 		    }
14819 		    if (*p == NUL)	/* tostr is shorter than fromstr */
14820 			goto error;
14821 		    break;
14822 		}
14823 		++idx;
14824 	    }
14825 
14826 	    if (first && cpstr == instr)
14827 	    {
14828 		/* Check that fromstr and tostr have the same number of
14829 		 * (multi-byte) characters.  Done only once when a character
14830 		 * of instr doesn't appear in fromstr. */
14831 		first = FALSE;
14832 		for (p = tostr; *p != NUL; p += tolen)
14833 		{
14834 		    tolen = (*mb_ptr2len)(p);
14835 		    --idx;
14836 		}
14837 		if (idx != 0)
14838 		    goto error;
14839 	    }
14840 
14841 	    ga_grow(&ga, cplen);
14842 	    mch_memmove((char *)ga.ga_data + ga.ga_len, cpstr, (size_t)cplen);
14843 	    ga.ga_len += cplen;
14844 
14845 	    instr += inlen;
14846 	}
14847 	else
14848 #endif
14849 	{
14850 	    /* When not using multi-byte chars we can do it faster. */
14851 	    p = vim_strchr(fromstr, *instr);
14852 	    if (p != NULL)
14853 		ga_append(&ga, tostr[p - fromstr]);
14854 	    else
14855 		ga_append(&ga, *instr);
14856 	    ++instr;
14857 	}
14858     }
14859 
14860     rettv->vval.v_string = ga.ga_data;
14861 }
14862 
14863 /*
14864  * "type(expr)" function
14865  */
14866     static void
14867 f_type(argvars, rettv)
14868     typval_T	*argvars;
14869     typval_T	*rettv;
14870 {
14871     int n;
14872 
14873     switch (argvars[0].v_type)
14874     {
14875 	case VAR_NUMBER: n = 0; break;
14876 	case VAR_STRING: n = 1; break;
14877 	case VAR_FUNC:   n = 2; break;
14878 	case VAR_LIST:   n = 3; break;
14879 	case VAR_DICT:   n = 4; break;
14880 	default: EMSG2(_(e_intern2), "f_type()"); n = 0; break;
14881     }
14882     rettv->vval.v_number = n;
14883 }
14884 
14885 /*
14886  * "values(dict)" function
14887  */
14888     static void
14889 f_values(argvars, rettv)
14890     typval_T	*argvars;
14891     typval_T	*rettv;
14892 {
14893     dict_list(argvars, rettv, 1);
14894 }
14895 
14896 /*
14897  * "virtcol(string)" function
14898  */
14899     static void
14900 f_virtcol(argvars, rettv)
14901     typval_T	*argvars;
14902     typval_T	*rettv;
14903 {
14904     colnr_T	vcol = 0;
14905     pos_T	*fp;
14906 
14907     fp = var2fpos(&argvars[0], FALSE);
14908     if (fp != NULL && fp->lnum <= curbuf->b_ml.ml_line_count)
14909     {
14910 	getvvcol(curwin, fp, NULL, NULL, &vcol);
14911 	++vcol;
14912     }
14913 
14914     rettv->vval.v_number = vcol;
14915 }
14916 
14917 /*
14918  * "visualmode()" function
14919  */
14920 /*ARGSUSED*/
14921     static void
14922 f_visualmode(argvars, rettv)
14923     typval_T	*argvars;
14924     typval_T	*rettv;
14925 {
14926 #ifdef FEAT_VISUAL
14927     char_u	str[2];
14928 
14929     rettv->v_type = VAR_STRING;
14930     str[0] = curbuf->b_visual_mode_eval;
14931     str[1] = NUL;
14932     rettv->vval.v_string = vim_strsave(str);
14933 
14934     /* A non-zero number or non-empty string argument: reset mode. */
14935     if ((argvars[0].v_type == VAR_NUMBER
14936 		&& argvars[0].vval.v_number != 0)
14937 	    || (argvars[0].v_type == VAR_STRING
14938 		&& *get_tv_string(&argvars[0]) != NUL))
14939 	curbuf->b_visual_mode_eval = NUL;
14940 #else
14941     rettv->vval.v_number = 0; /* return anything, it won't work anyway */
14942 #endif
14943 }
14944 
14945 /*
14946  * "winbufnr(nr)" function
14947  */
14948     static void
14949 f_winbufnr(argvars, rettv)
14950     typval_T	*argvars;
14951     typval_T	*rettv;
14952 {
14953     win_T	*wp;
14954 
14955     wp = find_win_by_nr(&argvars[0]);
14956     if (wp == NULL)
14957 	rettv->vval.v_number = -1;
14958     else
14959 	rettv->vval.v_number = wp->w_buffer->b_fnum;
14960 }
14961 
14962 /*
14963  * "wincol()" function
14964  */
14965 /*ARGSUSED*/
14966     static void
14967 f_wincol(argvars, rettv)
14968     typval_T	*argvars;
14969     typval_T	*rettv;
14970 {
14971     validate_cursor();
14972     rettv->vval.v_number = curwin->w_wcol + 1;
14973 }
14974 
14975 /*
14976  * "winheight(nr)" function
14977  */
14978     static void
14979 f_winheight(argvars, rettv)
14980     typval_T	*argvars;
14981     typval_T	*rettv;
14982 {
14983     win_T	*wp;
14984 
14985     wp = find_win_by_nr(&argvars[0]);
14986     if (wp == NULL)
14987 	rettv->vval.v_number = -1;
14988     else
14989 	rettv->vval.v_number = wp->w_height;
14990 }
14991 
14992 /*
14993  * "winline()" function
14994  */
14995 /*ARGSUSED*/
14996     static void
14997 f_winline(argvars, rettv)
14998     typval_T	*argvars;
14999     typval_T	*rettv;
15000 {
15001     validate_cursor();
15002     rettv->vval.v_number = curwin->w_wrow + 1;
15003 }
15004 
15005 /*
15006  * "winnr()" function
15007  */
15008 /* ARGSUSED */
15009     static void
15010 f_winnr(argvars, rettv)
15011     typval_T	*argvars;
15012     typval_T	*rettv;
15013 {
15014     int		nr = 1;
15015 #ifdef FEAT_WINDOWS
15016     win_T	*wp;
15017     win_T	*twin = curwin;
15018     char_u	*arg;
15019 
15020     if (argvars[0].v_type != VAR_UNKNOWN)
15021     {
15022 	arg = get_tv_string_chk(&argvars[0]);
15023 	if (arg == NULL)
15024 	    nr = 0;		/* type error; errmsg already given */
15025 	else if (STRCMP(arg, "$") == 0)
15026 	    twin = lastwin;
15027 	else if (STRCMP(arg, "#") == 0)
15028 	{
15029 	    twin = prevwin;
15030 	    if (prevwin == NULL)
15031 		nr = 0;
15032 	}
15033 	else
15034 	{
15035 	    EMSG2(_(e_invexpr2), arg);
15036 	    nr = 0;
15037 	}
15038     }
15039 
15040     if (nr > 0)
15041 	for (wp = firstwin; wp != twin; wp = wp->w_next)
15042 	    ++nr;
15043 #endif
15044     rettv->vval.v_number = nr;
15045 }
15046 
15047 /*
15048  * "winrestcmd()" function
15049  */
15050 /* ARGSUSED */
15051     static void
15052 f_winrestcmd(argvars, rettv)
15053     typval_T	*argvars;
15054     typval_T	*rettv;
15055 {
15056 #ifdef FEAT_WINDOWS
15057     win_T	*wp;
15058     int		winnr = 1;
15059     garray_T	ga;
15060     char_u	buf[50];
15061 
15062     ga_init2(&ga, (int)sizeof(char), 70);
15063     for (wp = firstwin; wp != NULL; wp = wp->w_next)
15064     {
15065 	sprintf((char *)buf, "%dresize %d|", winnr, wp->w_height);
15066 	ga_concat(&ga, buf);
15067 # ifdef FEAT_VERTSPLIT
15068 	sprintf((char *)buf, "vert %dresize %d|", winnr, wp->w_width);
15069 	ga_concat(&ga, buf);
15070 # endif
15071 	++winnr;
15072     }
15073     ga_append(&ga, NUL);
15074 
15075     rettv->vval.v_string = ga.ga_data;
15076 #else
15077     rettv->vval.v_string = NULL;
15078 #endif
15079     rettv->v_type = VAR_STRING;
15080 }
15081 
15082 /*
15083  * "winwidth(nr)" function
15084  */
15085     static void
15086 f_winwidth(argvars, rettv)
15087     typval_T	*argvars;
15088     typval_T	*rettv;
15089 {
15090     win_T	*wp;
15091 
15092     wp = find_win_by_nr(&argvars[0]);
15093     if (wp == NULL)
15094 	rettv->vval.v_number = -1;
15095     else
15096 #ifdef FEAT_VERTSPLIT
15097 	rettv->vval.v_number = wp->w_width;
15098 #else
15099 	rettv->vval.v_number = Columns;
15100 #endif
15101 }
15102 
15103 /*
15104  * "writefile()" function
15105  */
15106     static void
15107 f_writefile(argvars, rettv)
15108     typval_T	*argvars;
15109     typval_T	*rettv;
15110 {
15111     int		binary = FALSE;
15112     char_u	*fname;
15113     FILE	*fd;
15114     listitem_T	*li;
15115     char_u	*s;
15116     int		ret = 0;
15117     int		c;
15118 
15119     if (argvars[0].v_type != VAR_LIST)
15120     {
15121 	EMSG2(_(e_listarg), "writefile()");
15122 	return;
15123     }
15124     if (argvars[0].vval.v_list == NULL)
15125 	return;
15126 
15127     if (argvars[2].v_type != VAR_UNKNOWN
15128 			      && STRCMP(get_tv_string(&argvars[2]), "b") == 0)
15129 	binary = TRUE;
15130 
15131     /* Always open the file in binary mode, library functions have a mind of
15132      * their own about CR-LF conversion. */
15133     fname = get_tv_string(&argvars[1]);
15134     if (*fname == NUL || (fd = mch_fopen((char *)fname, WRITEBIN)) == NULL)
15135     {
15136 	EMSG2(_(e_notcreate), *fname == NUL ? (char_u *)_("<empty>") : fname);
15137 	ret = -1;
15138     }
15139     else
15140     {
15141 	for (li = argvars[0].vval.v_list->lv_first; li != NULL;
15142 							     li = li->li_next)
15143 	{
15144 	    for (s = get_tv_string(&li->li_tv); *s != NUL; ++s)
15145 	    {
15146 		if (*s == '\n')
15147 		    c = putc(NUL, fd);
15148 		else
15149 		    c = putc(*s, fd);
15150 		if (c == EOF)
15151 		{
15152 		    ret = -1;
15153 		    break;
15154 		}
15155 	    }
15156 	    if (!binary || li->li_next != NULL)
15157 		if (putc('\n', fd) == EOF)
15158 		{
15159 		    ret = -1;
15160 		    break;
15161 		}
15162 	    if (ret < 0)
15163 	    {
15164 		EMSG(_(e_write));
15165 		break;
15166 	    }
15167 	}
15168 	fclose(fd);
15169     }
15170 
15171     rettv->vval.v_number = ret;
15172 }
15173 
15174 /*
15175  * Translate a String variable into a position.
15176  */
15177     static pos_T *
15178 var2fpos(varp, lnum)
15179     typval_T	*varp;
15180     int		lnum;		/* TRUE when $ is last line */
15181 {
15182     char_u	*name;
15183     static pos_T	pos;
15184     pos_T	*pp;
15185 
15186     name = get_tv_string_chk(varp);
15187     if (name == NULL)
15188 	return NULL;
15189     if (name[0] == '.')		/* cursor */
15190 	return &curwin->w_cursor;
15191     if (name[0] == '\'')	/* mark */
15192     {
15193 	pp = getmark(name[1], FALSE);
15194 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
15195 	    return NULL;
15196 	return pp;
15197     }
15198     if (name[0] == '$')		/* last column or line */
15199     {
15200 	if (lnum)
15201 	{
15202 	    pos.lnum = curbuf->b_ml.ml_line_count;
15203 	    pos.col = 0;
15204 	}
15205 	else
15206 	{
15207 	    pos.lnum = curwin->w_cursor.lnum;
15208 	    pos.col = (colnr_T)STRLEN(ml_get_curline());
15209 	}
15210 	return &pos;
15211     }
15212     return NULL;
15213 }
15214 
15215 /*
15216  * Get the length of an environment variable name.
15217  * Advance "arg" to the first character after the name.
15218  * Return 0 for error.
15219  */
15220     static int
15221 get_env_len(arg)
15222     char_u	**arg;
15223 {
15224     char_u	*p;
15225     int		len;
15226 
15227     for (p = *arg; vim_isIDc(*p); ++p)
15228 	;
15229     if (p == *arg)	    /* no name found */
15230 	return 0;
15231 
15232     len = (int)(p - *arg);
15233     *arg = p;
15234     return len;
15235 }
15236 
15237 /*
15238  * Get the length of the name of a function or internal variable.
15239  * "arg" is advanced to the first non-white character after the name.
15240  * Return 0 if something is wrong.
15241  */
15242     static int
15243 get_id_len(arg)
15244     char_u	**arg;
15245 {
15246     char_u	*p;
15247     int		len;
15248 
15249     /* Find the end of the name. */
15250     for (p = *arg; eval_isnamec(*p); ++p)
15251 	;
15252     if (p == *arg)	    /* no name found */
15253 	return 0;
15254 
15255     len = (int)(p - *arg);
15256     *arg = skipwhite(p);
15257 
15258     return len;
15259 }
15260 
15261 /*
15262  * Get the length of the name of a variable or function.
15263  * Only the name is recognized, does not handle ".key" or "[idx]".
15264  * "arg" is advanced to the first non-white character after the name.
15265  * Return -1 if curly braces expansion failed.
15266  * Return 0 if something else is wrong.
15267  * If the name contains 'magic' {}'s, expand them and return the
15268  * expanded name in an allocated string via 'alias' - caller must free.
15269  */
15270     static int
15271 get_name_len(arg, alias, evaluate, verbose)
15272     char_u	**arg;
15273     char_u	**alias;
15274     int		evaluate;
15275     int		verbose;
15276 {
15277     int		len;
15278     char_u	*p;
15279     char_u	*expr_start;
15280     char_u	*expr_end;
15281 
15282     *alias = NULL;  /* default to no alias */
15283 
15284     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
15285 						  && (*arg)[2] == (int)KE_SNR)
15286     {
15287 	/* hard coded <SNR>, already translated */
15288 	*arg += 3;
15289 	return get_id_len(arg) + 3;
15290     }
15291     len = eval_fname_script(*arg);
15292     if (len > 0)
15293     {
15294 	/* literal "<SID>", "s:" or "<SNR>" */
15295 	*arg += len;
15296     }
15297 
15298     /*
15299      * Find the end of the name; check for {} construction.
15300      */
15301     p = find_name_end(*arg, &expr_start, &expr_end,
15302 					       len > 0 ? 0 : FNE_CHECK_START);
15303     if (expr_start != NULL)
15304     {
15305 	char_u	*temp_string;
15306 
15307 	if (!evaluate)
15308 	{
15309 	    len += (int)(p - *arg);
15310 	    *arg = skipwhite(p);
15311 	    return len;
15312 	}
15313 
15314 	/*
15315 	 * Include any <SID> etc in the expanded string:
15316 	 * Thus the -len here.
15317 	 */
15318 	temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
15319 	if (temp_string == NULL)
15320 	    return -1;
15321 	*alias = temp_string;
15322 	*arg = skipwhite(p);
15323 	return (int)STRLEN(temp_string);
15324     }
15325 
15326     len += get_id_len(arg);
15327     if (len == 0 && verbose)
15328 	EMSG2(_(e_invexpr2), *arg);
15329 
15330     return len;
15331 }
15332 
15333 /*
15334  * Find the end of a variable or function name, taking care of magic braces.
15335  * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
15336  * start and end of the first magic braces item.
15337  * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
15338  * Return a pointer to just after the name.  Equal to "arg" if there is no
15339  * valid name.
15340  */
15341     static char_u *
15342 find_name_end(arg, expr_start, expr_end, flags)
15343     char_u	*arg;
15344     char_u	**expr_start;
15345     char_u	**expr_end;
15346     int		flags;
15347 {
15348     int		mb_nest = 0;
15349     int		br_nest = 0;
15350     char_u	*p;
15351 
15352     if (expr_start != NULL)
15353     {
15354 	*expr_start = NULL;
15355 	*expr_end = NULL;
15356     }
15357 
15358     /* Quick check for valid starting character. */
15359     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
15360 	return arg;
15361 
15362     for (p = arg; *p != NUL
15363 		    && (eval_isnamec(*p)
15364 			|| *p == '{'
15365 			|| ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
15366 			|| mb_nest != 0
15367 			|| br_nest != 0); mb_ptr_adv(p))
15368     {
15369 	if (*p == '\'')
15370 	{
15371 	    /* skip over 'string' to avoid counting [ and ] inside it. */
15372 	    for (p = p + 1; *p != NUL && *p != '\''; mb_ptr_adv(p))
15373 		;
15374 	    if (*p == NUL)
15375 		break;
15376 	}
15377 	else if (*p == '"')
15378 	{
15379 	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
15380 	    for (p = p + 1; *p != NUL && *p != '"'; mb_ptr_adv(p))
15381 		if (*p == '\\' && p[1] != NUL)
15382 		    ++p;
15383 	    if (*p == NUL)
15384 		break;
15385 	}
15386 
15387 	if (mb_nest == 0)
15388 	{
15389 	    if (*p == '[')
15390 		++br_nest;
15391 	    else if (*p == ']')
15392 		--br_nest;
15393 	}
15394 
15395 	if (br_nest == 0)
15396 	{
15397 	    if (*p == '{')
15398 	    {
15399 		mb_nest++;
15400 		if (expr_start != NULL && *expr_start == NULL)
15401 		    *expr_start = p;
15402 	    }
15403 	    else if (*p == '}')
15404 	    {
15405 		mb_nest--;
15406 		if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
15407 		    *expr_end = p;
15408 	    }
15409 	}
15410     }
15411 
15412     return p;
15413 }
15414 
15415 /*
15416  * Expands out the 'magic' {}'s in a variable/function name.
15417  * Note that this can call itself recursively, to deal with
15418  * constructs like foo{bar}{baz}{bam}
15419  * The four pointer arguments point to "foo{expre}ss{ion}bar"
15420  *			"in_start"      ^
15421  *			"expr_start"	   ^
15422  *			"expr_end"		 ^
15423  *			"in_end"			    ^
15424  *
15425  * Returns a new allocated string, which the caller must free.
15426  * Returns NULL for failure.
15427  */
15428     static char_u *
15429 make_expanded_name(in_start, expr_start, expr_end, in_end)
15430     char_u	*in_start;
15431     char_u	*expr_start;
15432     char_u	*expr_end;
15433     char_u	*in_end;
15434 {
15435     char_u	c1;
15436     char_u	*retval = NULL;
15437     char_u	*temp_result;
15438     char_u	*nextcmd = NULL;
15439 
15440     if (expr_end == NULL || in_end == NULL)
15441 	return NULL;
15442     *expr_start	= NUL;
15443     *expr_end = NUL;
15444     c1 = *in_end;
15445     *in_end = NUL;
15446 
15447     temp_result = eval_to_string(expr_start + 1, &nextcmd);
15448     if (temp_result != NULL && nextcmd == NULL)
15449     {
15450 	retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
15451 						   + (in_end - expr_end) + 1));
15452 	if (retval != NULL)
15453 	{
15454 	    STRCPY(retval, in_start);
15455 	    STRCAT(retval, temp_result);
15456 	    STRCAT(retval, expr_end + 1);
15457 	}
15458     }
15459     vim_free(temp_result);
15460 
15461     *in_end = c1;		/* put char back for error messages */
15462     *expr_start = '{';
15463     *expr_end = '}';
15464 
15465     if (retval != NULL)
15466     {
15467 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
15468 	if (expr_start != NULL)
15469 	{
15470 	    /* Further expansion! */
15471 	    temp_result = make_expanded_name(retval, expr_start,
15472 						       expr_end, temp_result);
15473 	    vim_free(retval);
15474 	    retval = temp_result;
15475 	}
15476     }
15477 
15478     return retval;
15479 }
15480 
15481 /*
15482  * Return TRUE if character "c" can be used in a variable or function name.
15483  * Does not include '{' or '}' for magic braces.
15484  */
15485     static int
15486 eval_isnamec(c)
15487     int	    c;
15488 {
15489     return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
15490 }
15491 
15492 /*
15493  * Return TRUE if character "c" can be used as the first character in a
15494  * variable or function name (excluding '{' and '}').
15495  */
15496     static int
15497 eval_isnamec1(c)
15498     int	    c;
15499 {
15500     return (ASCII_ISALPHA(c) || c == '_');
15501 }
15502 
15503 /*
15504  * Set number v: variable to "val".
15505  */
15506     void
15507 set_vim_var_nr(idx, val)
15508     int		idx;
15509     long	val;
15510 {
15511     vimvars[idx].vv_nr = val;
15512 }
15513 
15514 /*
15515  * Get number v: variable value.
15516  */
15517     long
15518 get_vim_var_nr(idx)
15519     int		idx;
15520 {
15521     return vimvars[idx].vv_nr;
15522 }
15523 
15524 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15525 /*
15526  * Get string v: variable value.  Uses a static buffer, can only be used once.
15527  */
15528     char_u *
15529 get_vim_var_str(idx)
15530     int		idx;
15531 {
15532     return get_tv_string(&vimvars[idx].vv_tv);
15533 }
15534 #endif
15535 
15536 /*
15537  * Set v:count, v:count1 and v:prevcount.
15538  */
15539     void
15540 set_vcount(count, count1)
15541     long	count;
15542     long	count1;
15543 {
15544     vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
15545     vimvars[VV_COUNT].vv_nr = count;
15546     vimvars[VV_COUNT1].vv_nr = count1;
15547 }
15548 
15549 /*
15550  * Set string v: variable to a copy of "val".
15551  */
15552     void
15553 set_vim_var_string(idx, val, len)
15554     int		idx;
15555     char_u	*val;
15556     int		len;	    /* length of "val" to use or -1 (whole string) */
15557 {
15558     /* Need to do this (at least) once, since we can't initialize a union.
15559      * Will always be invoked when "v:progname" is set. */
15560     vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
15561 
15562     vim_free(vimvars[idx].vv_str);
15563     if (val == NULL)
15564 	vimvars[idx].vv_str = NULL;
15565     else if (len == -1)
15566 	vimvars[idx].vv_str = vim_strsave(val);
15567     else
15568 	vimvars[idx].vv_str = vim_strnsave(val, len);
15569 }
15570 
15571 /*
15572  * Set v:register if needed.
15573  */
15574     void
15575 set_reg_var(c)
15576     int		c;
15577 {
15578     char_u	regname;
15579 
15580     if (c == 0 || c == ' ')
15581 	regname = '"';
15582     else
15583 	regname = c;
15584     /* Avoid free/alloc when the value is already right. */
15585     if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
15586 	set_vim_var_string(VV_REG, &regname, 1);
15587 }
15588 
15589 /*
15590  * Get or set v:exception.  If "oldval" == NULL, return the current value.
15591  * Otherwise, restore the value to "oldval" and return NULL.
15592  * Must always be called in pairs to save and restore v:exception!  Does not
15593  * take care of memory allocations.
15594  */
15595     char_u *
15596 v_exception(oldval)
15597     char_u	*oldval;
15598 {
15599     if (oldval == NULL)
15600 	return vimvars[VV_EXCEPTION].vv_str;
15601 
15602     vimvars[VV_EXCEPTION].vv_str = oldval;
15603     return NULL;
15604 }
15605 
15606 /*
15607  * Get or set v:throwpoint.  If "oldval" == NULL, return the current value.
15608  * Otherwise, restore the value to "oldval" and return NULL.
15609  * Must always be called in pairs to save and restore v:throwpoint!  Does not
15610  * take care of memory allocations.
15611  */
15612     char_u *
15613 v_throwpoint(oldval)
15614     char_u	*oldval;
15615 {
15616     if (oldval == NULL)
15617 	return vimvars[VV_THROWPOINT].vv_str;
15618 
15619     vimvars[VV_THROWPOINT].vv_str = oldval;
15620     return NULL;
15621 }
15622 
15623 #if defined(FEAT_AUTOCMD) || defined(PROTO)
15624 /*
15625  * Set v:cmdarg.
15626  * If "eap" != NULL, use "eap" to generate the value and return the old value.
15627  * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
15628  * Must always be called in pairs!
15629  */
15630     char_u *
15631 set_cmdarg(eap, oldarg)
15632     exarg_T	*eap;
15633     char_u	*oldarg;
15634 {
15635     char_u	*oldval;
15636     char_u	*newval;
15637     unsigned	len;
15638 
15639     oldval = vimvars[VV_CMDARG].vv_str;
15640     if (eap == NULL)
15641     {
15642 	vim_free(oldval);
15643 	vimvars[VV_CMDARG].vv_str = oldarg;
15644 	return NULL;
15645     }
15646 
15647     if (eap->force_bin == FORCE_BIN)
15648 	len = 6;
15649     else if (eap->force_bin == FORCE_NOBIN)
15650 	len = 8;
15651     else
15652 	len = 0;
15653     if (eap->force_ff != 0)
15654 	len += (unsigned)STRLEN(eap->cmd + eap->force_ff) + 6;
15655 # ifdef FEAT_MBYTE
15656     if (eap->force_enc != 0)
15657 	len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
15658 # endif
15659 
15660     newval = alloc(len + 1);
15661     if (newval == NULL)
15662 	return NULL;
15663 
15664     if (eap->force_bin == FORCE_BIN)
15665 	sprintf((char *)newval, " ++bin");
15666     else if (eap->force_bin == FORCE_NOBIN)
15667 	sprintf((char *)newval, " ++nobin");
15668     else
15669 	*newval = NUL;
15670     if (eap->force_ff != 0)
15671 	sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
15672 						eap->cmd + eap->force_ff);
15673 # ifdef FEAT_MBYTE
15674     if (eap->force_enc != 0)
15675 	sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
15676 					       eap->cmd + eap->force_enc);
15677 # endif
15678     vimvars[VV_CMDARG].vv_str = newval;
15679     return oldval;
15680 }
15681 #endif
15682 
15683 /*
15684  * Get the value of internal variable "name".
15685  * Return OK or FAIL.
15686  */
15687     static int
15688 get_var_tv(name, len, rettv, verbose)
15689     char_u	*name;
15690     int		len;		/* length of "name" */
15691     typval_T	*rettv;		/* NULL when only checking existence */
15692     int		verbose;	/* may give error message */
15693 {
15694     int		ret = OK;
15695     typval_T	*tv = NULL;
15696     typval_T	atv;
15697     dictitem_T	*v;
15698     int		cc;
15699 
15700     /* truncate the name, so that we can use strcmp() */
15701     cc = name[len];
15702     name[len] = NUL;
15703 
15704     /*
15705      * Check for "b:changedtick".
15706      */
15707     if (STRCMP(name, "b:changedtick") == 0)
15708     {
15709 	atv.v_type = VAR_NUMBER;
15710 	atv.vval.v_number = curbuf->b_changedtick;
15711 	tv = &atv;
15712     }
15713 
15714     /*
15715      * Check for user-defined variables.
15716      */
15717     else
15718     {
15719 	v = find_var(name, NULL);
15720 	if (v != NULL)
15721 	    tv = &v->di_tv;
15722     }
15723 
15724     if (tv == NULL)
15725     {
15726 	if (rettv != NULL && verbose)
15727 	    EMSG2(_(e_undefvar), name);
15728 	ret = FAIL;
15729     }
15730     else if (rettv != NULL)
15731 	copy_tv(tv, rettv);
15732 
15733     name[len] = cc;
15734 
15735     return ret;
15736 }
15737 
15738 /*
15739  * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
15740  * Also handle function call with Funcref variable: func(expr)
15741  * Can all be combined: dict.func(expr)[idx]['func'](expr)
15742  */
15743     static int
15744 handle_subscript(arg, rettv, evaluate, verbose)
15745     char_u	**arg;
15746     typval_T	*rettv;
15747     int		evaluate;	/* do more than finding the end */
15748     int		verbose;	/* give error messages */
15749 {
15750     int		ret = OK;
15751     dict_T	*selfdict = NULL;
15752     char_u	*s;
15753     int		len;
15754     typval_T	functv;
15755 
15756     while (ret == OK
15757 	    && (**arg == '['
15758 		|| (**arg == '.' && rettv->v_type == VAR_DICT)
15759 		|| (**arg == '(' && rettv->v_type == VAR_FUNC))
15760 	    && !vim_iswhite(*(*arg - 1)))
15761     {
15762 	if (**arg == '(')
15763 	{
15764 	    /* need to copy the funcref so that we can clear rettv */
15765 	    functv = *rettv;
15766 	    rettv->v_type = VAR_UNKNOWN;
15767 
15768 	    /* Invoke the function.  Recursive! */
15769 	    s = functv.vval.v_string;
15770 	    ret = get_func_tv(s, STRLEN(s), rettv, arg,
15771 			curwin->w_cursor.lnum, curwin->w_cursor.lnum,
15772 			&len, evaluate, selfdict);
15773 
15774 	    /* Clear the funcref afterwards, so that deleting it while
15775 	     * evaluating the arguments is possible (see test55). */
15776 	    clear_tv(&functv);
15777 
15778 	    /* Stop the expression evaluation when immediately aborting on
15779 	     * error, or when an interrupt occurred or an exception was thrown
15780 	     * but not caught. */
15781 	    if (aborting())
15782 	    {
15783 		if (ret == OK)
15784 		    clear_tv(rettv);
15785 		ret = FAIL;
15786 	    }
15787 	    dict_unref(selfdict);
15788 	    selfdict = NULL;
15789 	}
15790 	else /* **arg == '[' || **arg == '.' */
15791 	{
15792 	    dict_unref(selfdict);
15793 	    if (rettv->v_type == VAR_DICT)
15794 	    {
15795 		selfdict = rettv->vval.v_dict;
15796 		if (selfdict != NULL)
15797 		    ++selfdict->dv_refcount;
15798 	    }
15799 	    else
15800 		selfdict = NULL;
15801 	    if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
15802 	    {
15803 		clear_tv(rettv);
15804 		ret = FAIL;
15805 	    }
15806 	}
15807     }
15808     dict_unref(selfdict);
15809     return ret;
15810 }
15811 
15812 /*
15813  * Allocate memory for a variable type-value, and make it emtpy (0 or NULL
15814  * value).
15815  */
15816     static typval_T *
15817 alloc_tv()
15818 {
15819     return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
15820 }
15821 
15822 /*
15823  * Allocate memory for a variable type-value, and assign a string to it.
15824  * The string "s" must have been allocated, it is consumed.
15825  * Return NULL for out of memory, the variable otherwise.
15826  */
15827     static typval_T *
15828 alloc_string_tv(s)
15829     char_u	*s;
15830 {
15831     typval_T	*rettv;
15832 
15833     rettv = alloc_tv();
15834     if (rettv != NULL)
15835     {
15836 	rettv->v_type = VAR_STRING;
15837 	rettv->vval.v_string = s;
15838     }
15839     else
15840 	vim_free(s);
15841     return rettv;
15842 }
15843 
15844 /*
15845  * Free the memory for a variable type-value.
15846  */
15847     static void
15848 free_tv(varp)
15849     typval_T *varp;
15850 {
15851     if (varp != NULL)
15852     {
15853 	switch (varp->v_type)
15854 	{
15855 	    case VAR_FUNC:
15856 		func_unref(varp->vval.v_string);
15857 		/*FALLTHROUGH*/
15858 	    case VAR_STRING:
15859 		vim_free(varp->vval.v_string);
15860 		break;
15861 	    case VAR_LIST:
15862 		list_unref(varp->vval.v_list);
15863 		break;
15864 	    case VAR_DICT:
15865 		dict_unref(varp->vval.v_dict);
15866 		break;
15867 	    case VAR_NUMBER:
15868 	    case VAR_UNKNOWN:
15869 		break;
15870 	    default:
15871 		EMSG2(_(e_intern2), "free_tv()");
15872 		break;
15873 	}
15874 	vim_free(varp);
15875     }
15876 }
15877 
15878 /*
15879  * Free the memory for a variable value and set the value to NULL or 0.
15880  */
15881     void
15882 clear_tv(varp)
15883     typval_T *varp;
15884 {
15885     if (varp != NULL)
15886     {
15887 	switch (varp->v_type)
15888 	{
15889 	    case VAR_FUNC:
15890 		func_unref(varp->vval.v_string);
15891 		/*FALLTHROUGH*/
15892 	    case VAR_STRING:
15893 		vim_free(varp->vval.v_string);
15894 		varp->vval.v_string = NULL;
15895 		break;
15896 	    case VAR_LIST:
15897 		list_unref(varp->vval.v_list);
15898 		varp->vval.v_list = NULL;
15899 		break;
15900 	    case VAR_DICT:
15901 		dict_unref(varp->vval.v_dict);
15902 		varp->vval.v_dict = NULL;
15903 		break;
15904 	    case VAR_NUMBER:
15905 		varp->vval.v_number = 0;
15906 		break;
15907 	    case VAR_UNKNOWN:
15908 		break;
15909 	    default:
15910 		EMSG2(_(e_intern2), "clear_tv()");
15911 	}
15912 	varp->v_lock = 0;
15913     }
15914 }
15915 
15916 /*
15917  * Set the value of a variable to NULL without freeing items.
15918  */
15919     static void
15920 init_tv(varp)
15921     typval_T *varp;
15922 {
15923     if (varp != NULL)
15924 	vim_memset(varp, 0, sizeof(typval_T));
15925 }
15926 
15927 /*
15928  * Get the number value of a variable.
15929  * If it is a String variable, uses vim_str2nr().
15930  * For incompatible types, return 0.
15931  * get_tv_number_chk() is similar to get_tv_number(), but informs the
15932  * caller of incompatible types: it sets *denote to TRUE if "denote"
15933  * is not NULL or returns -1 otherwise.
15934  */
15935     static long
15936 get_tv_number(varp)
15937     typval_T	*varp;
15938 {
15939     int		error = FALSE;
15940 
15941     return get_tv_number_chk(varp, &error);	/* return 0L on error */
15942 }
15943 
15944     long
15945 get_tv_number_chk(varp, denote)
15946     typval_T	*varp;
15947     int		*denote;
15948 {
15949     long	n = 0L;
15950 
15951     switch (varp->v_type)
15952     {
15953 	case VAR_NUMBER:
15954 	    return (long)(varp->vval.v_number);
15955 	case VAR_FUNC:
15956 	    EMSG(_("E703: Using a Funcref as a number"));
15957 	    break;
15958 	case VAR_STRING:
15959 	    if (varp->vval.v_string != NULL)
15960 		vim_str2nr(varp->vval.v_string, NULL, NULL,
15961 							TRUE, TRUE, &n, NULL);
15962 	    return n;
15963 	case VAR_LIST:
15964 	    EMSG(_("E745: Using a List as a number"));
15965 	    break;
15966 	case VAR_DICT:
15967 	    EMSG(_("E728: Using a Dictionary as a number"));
15968 	    break;
15969 	default:
15970 	    EMSG2(_(e_intern2), "get_tv_number()");
15971 	    break;
15972     }
15973     if (denote == NULL)		/* useful for values that must be unsigned */
15974 	n = -1;
15975     else
15976 	*denote = TRUE;
15977     return n;
15978 }
15979 
15980 /*
15981  * Get the lnum from the first argument.
15982  * Also accepts ".", "$", etc., but that only works for the current buffer.
15983  * Returns -1 on error.
15984  */
15985     static linenr_T
15986 get_tv_lnum(argvars)
15987     typval_T	*argvars;
15988 {
15989     typval_T	rettv;
15990     linenr_T	lnum;
15991 
15992     lnum = get_tv_number_chk(&argvars[0], NULL);
15993     if (lnum == 0)  /* no valid number, try using line() */
15994     {
15995 	rettv.v_type = VAR_NUMBER;
15996 	f_line(argvars, &rettv);
15997 	lnum = rettv.vval.v_number;
15998 	clear_tv(&rettv);
15999     }
16000     return lnum;
16001 }
16002 
16003 /*
16004  * Get the lnum from the first argument.
16005  * Also accepts "$", then "buf" is used.
16006  * Returns 0 on error.
16007  */
16008     static linenr_T
16009 get_tv_lnum_buf(argvars, buf)
16010     typval_T	*argvars;
16011     buf_T	*buf;
16012 {
16013     if (argvars[0].v_type == VAR_STRING
16014 	    && argvars[0].vval.v_string != NULL
16015 	    && argvars[0].vval.v_string[0] == '$'
16016 	    && buf != NULL)
16017 	return buf->b_ml.ml_line_count;
16018     return get_tv_number_chk(&argvars[0], NULL);
16019 }
16020 
16021 /*
16022  * Get the string value of a variable.
16023  * If it is a Number variable, the number is converted into a string.
16024  * get_tv_string() uses a single, static buffer.  YOU CAN ONLY USE IT ONCE!
16025  * get_tv_string_buf() uses a given buffer.
16026  * If the String variable has never been set, return an empty string.
16027  * Never returns NULL;
16028  * get_tv_string_chk() and get_tv_string_buf_chk() are similar, but return
16029  * NULL on error.
16030  */
16031     static char_u *
16032 get_tv_string(varp)
16033     typval_T	*varp;
16034 {
16035     static char_u   mybuf[NUMBUFLEN];
16036 
16037     return get_tv_string_buf(varp, mybuf);
16038 }
16039 
16040     static char_u *
16041 get_tv_string_buf(varp, buf)
16042     typval_T	*varp;
16043     char_u	*buf;
16044 {
16045     char_u	*res =  get_tv_string_buf_chk(varp, buf);
16046 
16047     return res != NULL ? res : (char_u *)"";
16048 }
16049 
16050     char_u *
16051 get_tv_string_chk(varp)
16052     typval_T	*varp;
16053 {
16054     static char_u   mybuf[NUMBUFLEN];
16055 
16056     return get_tv_string_buf_chk(varp, mybuf);
16057 }
16058 
16059     static char_u *
16060 get_tv_string_buf_chk(varp, buf)
16061     typval_T	*varp;
16062     char_u	*buf;
16063 {
16064     switch (varp->v_type)
16065     {
16066 	case VAR_NUMBER:
16067 	    sprintf((char *)buf, "%ld", (long)varp->vval.v_number);
16068 	    return buf;
16069 	case VAR_FUNC:
16070 	    EMSG(_("E729: using Funcref as a String"));
16071 	    break;
16072 	case VAR_LIST:
16073 	    EMSG(_("E730: using List as a String"));
16074 	    break;
16075 	case VAR_DICT:
16076 	    EMSG(_("E731: using Dictionary as a String"));
16077 	    break;
16078 	case VAR_STRING:
16079 	    if (varp->vval.v_string != NULL)
16080 		return varp->vval.v_string;
16081 	    return (char_u *)"";
16082 	default:
16083 	    EMSG2(_(e_intern2), "get_tv_string_buf()");
16084 	    break;
16085     }
16086     return NULL;
16087 }
16088 
16089 /*
16090  * Find variable "name" in the list of variables.
16091  * Return a pointer to it if found, NULL if not found.
16092  * Careful: "a:0" variables don't have a name.
16093  * When "htp" is not NULL we are writing to the variable, set "htp" to the
16094  * hashtab_T used.
16095  */
16096     static dictitem_T *
16097 find_var(name, htp)
16098     char_u	*name;
16099     hashtab_T	**htp;
16100 {
16101     char_u	*varname;
16102     hashtab_T	*ht;
16103 
16104     ht = find_var_ht(name, &varname);
16105     if (htp != NULL)
16106 	*htp = ht;
16107     if (ht == NULL)
16108 	return NULL;
16109     return find_var_in_ht(ht, varname, htp != NULL);
16110 }
16111 
16112 /*
16113  * Find variable "varname" in hashtab "ht".
16114  * Returns NULL if not found.
16115  */
16116     static dictitem_T *
16117 find_var_in_ht(ht, varname, writing)
16118     hashtab_T	*ht;
16119     char_u	*varname;
16120     int		writing;
16121 {
16122     hashitem_T	*hi;
16123 
16124     if (*varname == NUL)
16125     {
16126 	/* Must be something like "s:", otherwise "ht" would be NULL. */
16127 	switch (varname[-2])
16128 	{
16129 	    case 's': return &SCRIPT_SV(current_SID).sv_var;
16130 	    case 'g': return &globvars_var;
16131 	    case 'v': return &vimvars_var;
16132 	    case 'b': return &curbuf->b_bufvar;
16133 	    case 'w': return &curwin->w_winvar;
16134 	    case 'l': return current_funccal == NULL
16135 					? NULL : &current_funccal->l_vars_var;
16136 	    case 'a': return current_funccal == NULL
16137 				       ? NULL : &current_funccal->l_avars_var;
16138 	}
16139 	return NULL;
16140     }
16141 
16142     hi = hash_find(ht, varname);
16143     if (HASHITEM_EMPTY(hi))
16144     {
16145 	/* For global variables we may try auto-loading the script.  If it
16146 	 * worked find the variable again.  Don't auto-load a script if it was
16147 	 * loaded already, otherwise it would be loaded every time when
16148 	 * checking if a function name is a Funcref variable. */
16149 	if (ht == &globvarht && !writing
16150 			    && script_autoload(varname, FALSE) && !aborting())
16151 	    hi = hash_find(ht, varname);
16152 	if (HASHITEM_EMPTY(hi))
16153 	    return NULL;
16154     }
16155     return HI2DI(hi);
16156 }
16157 
16158 /*
16159  * Find the hashtab used for a variable name.
16160  * Set "varname" to the start of name without ':'.
16161  */
16162     static hashtab_T *
16163 find_var_ht(name, varname)
16164     char_u  *name;
16165     char_u  **varname;
16166 {
16167     hashitem_T	*hi;
16168 
16169     if (name[1] != ':')
16170     {
16171 	/* The name must not start with a colon or #. */
16172 	if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
16173 	    return NULL;
16174 	*varname = name;
16175 
16176 	/* "version" is "v:version" in all scopes */
16177 	hi = hash_find(&compat_hashtab, name);
16178 	if (!HASHITEM_EMPTY(hi))
16179 	    return &compat_hashtab;
16180 
16181 	if (current_funccal == NULL)
16182 	    return &globvarht;			/* global variable */
16183 	return &current_funccal->l_vars.dv_hashtab; /* l: variable */
16184     }
16185     *varname = name + 2;
16186     if (*name == 'g')				/* global variable */
16187 	return &globvarht;
16188     /* There must be no ':' or '#' in the rest of the name, unless g: is used
16189      */
16190     if (vim_strchr(name + 2, ':') != NULL
16191 			       || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
16192 	return NULL;
16193     if (*name == 'b')				/* buffer variable */
16194 	return &curbuf->b_vars.dv_hashtab;
16195     if (*name == 'w')				/* window variable */
16196 	return &curwin->w_vars.dv_hashtab;
16197     if (*name == 'v')				/* v: variable */
16198 	return &vimvarht;
16199     if (*name == 'a' && current_funccal != NULL) /* function argument */
16200 	return &current_funccal->l_avars.dv_hashtab;
16201     if (*name == 'l' && current_funccal != NULL) /* local function variable */
16202 	return &current_funccal->l_vars.dv_hashtab;
16203     if (*name == 's'				/* script variable */
16204 	    && current_SID > 0 && current_SID <= ga_scripts.ga_len)
16205 	return &SCRIPT_VARS(current_SID);
16206     return NULL;
16207 }
16208 
16209 /*
16210  * Get the string value of a (global/local) variable.
16211  * Returns NULL when it doesn't exist.
16212  */
16213     char_u *
16214 get_var_value(name)
16215     char_u	*name;
16216 {
16217     dictitem_T	*v;
16218 
16219     v = find_var(name, NULL);
16220     if (v == NULL)
16221 	return NULL;
16222     return get_tv_string(&v->di_tv);
16223 }
16224 
16225 /*
16226  * Allocate a new hashtab for a sourced script.  It will be used while
16227  * sourcing this script and when executing functions defined in the script.
16228  */
16229     void
16230 new_script_vars(id)
16231     scid_T id;
16232 {
16233     int		i;
16234     hashtab_T	*ht;
16235     scriptvar_T *sv;
16236 
16237     if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
16238     {
16239 	/* Re-allocating ga_data means that an ht_array pointing to
16240 	 * ht_smallarray becomes invalid.  We can recognize this: ht_mask is
16241 	 * at its init value.  Also reset "v_dict", it's always the same. */
16242 	for (i = 1; i <= ga_scripts.ga_len; ++i)
16243 	{
16244 	    ht = &SCRIPT_VARS(i);
16245 	    if (ht->ht_mask == HT_INIT_SIZE - 1)
16246 		ht->ht_array = ht->ht_smallarray;
16247 	    sv = &SCRIPT_SV(i);
16248 	    sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
16249 	}
16250 
16251 	while (ga_scripts.ga_len < id)
16252 	{
16253 	    sv = &SCRIPT_SV(ga_scripts.ga_len + 1);
16254 	    init_var_dict(&sv->sv_dict, &sv->sv_var);
16255 	    ++ga_scripts.ga_len;
16256 	}
16257     }
16258 }
16259 
16260 /*
16261  * Initialize dictionary "dict" as a scope and set variable "dict_var" to
16262  * point to it.
16263  */
16264     void
16265 init_var_dict(dict, dict_var)
16266     dict_T	*dict;
16267     dictitem_T	*dict_var;
16268 {
16269     hash_init(&dict->dv_hashtab);
16270     dict->dv_refcount = 99999;
16271     dict_var->di_tv.vval.v_dict = dict;
16272     dict_var->di_tv.v_type = VAR_DICT;
16273     dict_var->di_tv.v_lock = VAR_FIXED;
16274     dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
16275     dict_var->di_key[0] = NUL;
16276 }
16277 
16278 /*
16279  * Clean up a list of internal variables.
16280  * Frees all allocated variables and the value they contain.
16281  * Clears hashtab "ht", does not free it.
16282  */
16283     void
16284 vars_clear(ht)
16285     hashtab_T *ht;
16286 {
16287     vars_clear_ext(ht, TRUE);
16288 }
16289 
16290 /*
16291  * Like vars_clear(), but only free the value if "free_val" is TRUE.
16292  */
16293     static void
16294 vars_clear_ext(ht, free_val)
16295     hashtab_T	*ht;
16296     int		free_val;
16297 {
16298     int		todo;
16299     hashitem_T	*hi;
16300     dictitem_T	*v;
16301 
16302     hash_lock(ht);
16303     todo = ht->ht_used;
16304     for (hi = ht->ht_array; todo > 0; ++hi)
16305     {
16306 	if (!HASHITEM_EMPTY(hi))
16307 	{
16308 	    --todo;
16309 
16310 	    /* Free the variable.  Don't remove it from the hashtab,
16311 	     * ht_array might change then.  hash_clear() takes care of it
16312 	     * later. */
16313 	    v = HI2DI(hi);
16314 	    if (free_val)
16315 		clear_tv(&v->di_tv);
16316 	    if ((v->di_flags & DI_FLAGS_FIX) == 0)
16317 		vim_free(v);
16318 	}
16319     }
16320     hash_clear(ht);
16321     ht->ht_used = 0;
16322 }
16323 
16324 /*
16325  * Delete a variable from hashtab "ht" at item "hi".
16326  * Clear the variable value and free the dictitem.
16327  */
16328     static void
16329 delete_var(ht, hi)
16330     hashtab_T	*ht;
16331     hashitem_T	*hi;
16332 {
16333     dictitem_T	*di = HI2DI(hi);
16334 
16335     hash_remove(ht, hi);
16336     clear_tv(&di->di_tv);
16337     vim_free(di);
16338 }
16339 
16340 /*
16341  * List the value of one internal variable.
16342  */
16343     static void
16344 list_one_var(v, prefix)
16345     dictitem_T	*v;
16346     char_u	*prefix;
16347 {
16348     char_u	*tofree;
16349     char_u	*s;
16350     char_u	numbuf[NUMBUFLEN];
16351 
16352     s = echo_string(&v->di_tv, &tofree, numbuf);
16353     list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
16354 						s == NULL ? (char_u *)"" : s);
16355     vim_free(tofree);
16356 }
16357 
16358     static void
16359 list_one_var_a(prefix, name, type, string)
16360     char_u	*prefix;
16361     char_u	*name;
16362     int		type;
16363     char_u	*string;
16364 {
16365     msg_attr(prefix, 0);    /* don't use msg(), it overwrites "v:statusmsg" */
16366     if (name != NULL)	/* "a:" vars don't have a name stored */
16367 	msg_puts(name);
16368     msg_putchar(' ');
16369     msg_advance(22);
16370     if (type == VAR_NUMBER)
16371 	msg_putchar('#');
16372     else if (type == VAR_FUNC)
16373 	msg_putchar('*');
16374     else if (type == VAR_LIST)
16375     {
16376 	msg_putchar('[');
16377 	if (*string == '[')
16378 	    ++string;
16379     }
16380     else if (type == VAR_DICT)
16381     {
16382 	msg_putchar('{');
16383 	if (*string == '{')
16384 	    ++string;
16385     }
16386     else
16387 	msg_putchar(' ');
16388 
16389     msg_outtrans(string);
16390 
16391     if (type == VAR_FUNC)
16392 	msg_puts((char_u *)"()");
16393 }
16394 
16395 /*
16396  * Set variable "name" to value in "tv".
16397  * If the variable already exists, the value is updated.
16398  * Otherwise the variable is created.
16399  */
16400     static void
16401 set_var(name, tv, copy)
16402     char_u	*name;
16403     typval_T	*tv;
16404     int		copy;	    /* make copy of value in "tv" */
16405 {
16406     dictitem_T	*v;
16407     char_u	*varname;
16408     hashtab_T	*ht;
16409     char_u	*p;
16410 
16411     if (tv->v_type == VAR_FUNC)
16412     {
16413 	if (!(vim_strchr((char_u *)"wbs", name[0]) != NULL && name[1] == ':')
16414 		&& !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
16415 							 ? name[2] : name[0]))
16416 	{
16417 	    EMSG2(_("E704: Funcref variable name must start with a capital: %s"), name);
16418 	    return;
16419 	}
16420 	if (function_exists(name))
16421 	{
16422 	    EMSG2(_("E705: Variable name conflicts with existing function: %s"),
16423 									name);
16424 	    return;
16425 	}
16426     }
16427 
16428     ht = find_var_ht(name, &varname);
16429     if (ht == NULL || *varname == NUL)
16430     {
16431 	EMSG2(_(e_illvar), name);
16432 	return;
16433     }
16434 
16435     v = find_var_in_ht(ht, varname, TRUE);
16436     if (v != NULL)
16437     {
16438 	/* existing variable, need to clear the value */
16439 	if (var_check_ro(v->di_flags, name)
16440 				      || tv_check_lock(v->di_tv.v_lock, name))
16441 	    return;
16442 	if (v->di_tv.v_type != tv->v_type
16443 		&& !((v->di_tv.v_type == VAR_STRING
16444 			|| v->di_tv.v_type == VAR_NUMBER)
16445 		    && (tv->v_type == VAR_STRING
16446 			|| tv->v_type == VAR_NUMBER)))
16447 	{
16448 	    EMSG2(_("E706: Variable type mismatch for: %s"), name);
16449 	    return;
16450 	}
16451 
16452 	/*
16453 	 * Handle setting internal v: variables separately: we don't change
16454 	 * the type.
16455 	 */
16456 	if (ht == &vimvarht)
16457 	{
16458 	    if (v->di_tv.v_type == VAR_STRING)
16459 	    {
16460 		vim_free(v->di_tv.vval.v_string);
16461 		if (copy || tv->v_type != VAR_STRING)
16462 		    v->di_tv.vval.v_string = vim_strsave(get_tv_string(tv));
16463 		else
16464 		{
16465 		    /* Take over the string to avoid an extra alloc/free. */
16466 		    v->di_tv.vval.v_string = tv->vval.v_string;
16467 		    tv->vval.v_string = NULL;
16468 		}
16469 	    }
16470 	    else if (v->di_tv.v_type != VAR_NUMBER)
16471 		EMSG2(_(e_intern2), "set_var()");
16472 	    else
16473 		v->di_tv.vval.v_number = get_tv_number(tv);
16474 	    return;
16475 	}
16476 
16477 	clear_tv(&v->di_tv);
16478     }
16479     else		    /* add a new variable */
16480     {
16481 	/* Make sure the variable name is valid. */
16482 	for (p = varname; *p != NUL; ++p)
16483 	    if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p)))
16484 	    {
16485 		EMSG2(_(e_illvar), varname);
16486 		return;
16487 	    }
16488 
16489 	v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
16490 							  + STRLEN(varname)));
16491 	if (v == NULL)
16492 	    return;
16493 	STRCPY(v->di_key, varname);
16494 	if (hash_add(ht, DI2HIKEY(v)) == FAIL)
16495 	{
16496 	    vim_free(v);
16497 	    return;
16498 	}
16499 	v->di_flags = 0;
16500     }
16501 
16502     if (copy || tv->v_type == VAR_NUMBER)
16503 	copy_tv(tv, &v->di_tv);
16504     else
16505     {
16506 	v->di_tv = *tv;
16507 	v->di_tv.v_lock = 0;
16508 	init_tv(tv);
16509     }
16510 }
16511 
16512 /*
16513  * Return TRUE if di_flags "flags" indicate read-only variable "name".
16514  * Also give an error message.
16515  */
16516     static int
16517 var_check_ro(flags, name)
16518     int		flags;
16519     char_u	*name;
16520 {
16521     if (flags & DI_FLAGS_RO)
16522     {
16523 	EMSG2(_(e_readonlyvar), name);
16524 	return TRUE;
16525     }
16526     if ((flags & DI_FLAGS_RO_SBX) && sandbox)
16527     {
16528 	EMSG2(_(e_readonlysbx), name);
16529 	return TRUE;
16530     }
16531     return FALSE;
16532 }
16533 
16534 /*
16535  * Return TRUE if typeval "tv" is set to be locked (immutable).
16536  * Also give an error message, using "name".
16537  */
16538     static int
16539 tv_check_lock(lock, name)
16540     int		lock;
16541     char_u	*name;
16542 {
16543     if (lock & VAR_LOCKED)
16544     {
16545 	EMSG2(_("E741: Value is locked: %s"),
16546 				name == NULL ? (char_u *)_("Unknown") : name);
16547 	return TRUE;
16548     }
16549     if (lock & VAR_FIXED)
16550     {
16551 	EMSG2(_("E742: Cannot change value of %s"),
16552 				name == NULL ? (char_u *)_("Unknown") : name);
16553 	return TRUE;
16554     }
16555     return FALSE;
16556 }
16557 
16558 /*
16559  * Copy the values from typval_T "from" to typval_T "to".
16560  * When needed allocates string or increases reference count.
16561  * Does not make a copy of a list or dict but copies the reference!
16562  */
16563     static void
16564 copy_tv(from, to)
16565     typval_T *from;
16566     typval_T *to;
16567 {
16568     to->v_type = from->v_type;
16569     to->v_lock = 0;
16570     switch (from->v_type)
16571     {
16572 	case VAR_NUMBER:
16573 	    to->vval.v_number = from->vval.v_number;
16574 	    break;
16575 	case VAR_STRING:
16576 	case VAR_FUNC:
16577 	    if (from->vval.v_string == NULL)
16578 		to->vval.v_string = NULL;
16579 	    else
16580 	    {
16581 		to->vval.v_string = vim_strsave(from->vval.v_string);
16582 		if (from->v_type == VAR_FUNC)
16583 		    func_ref(to->vval.v_string);
16584 	    }
16585 	    break;
16586 	case VAR_LIST:
16587 	    if (from->vval.v_list == NULL)
16588 		to->vval.v_list = NULL;
16589 	    else
16590 	    {
16591 		to->vval.v_list = from->vval.v_list;
16592 		++to->vval.v_list->lv_refcount;
16593 	    }
16594 	    break;
16595 	case VAR_DICT:
16596 	    if (from->vval.v_dict == NULL)
16597 		to->vval.v_dict = NULL;
16598 	    else
16599 	    {
16600 		to->vval.v_dict = from->vval.v_dict;
16601 		++to->vval.v_dict->dv_refcount;
16602 	    }
16603 	    break;
16604 	default:
16605 	    EMSG2(_(e_intern2), "copy_tv()");
16606 	    break;
16607     }
16608 }
16609 
16610 /*
16611  * Make a copy of an item.
16612  * Lists and Dictionaries are also copied.  A deep copy if "deep" is set.
16613  * For deepcopy() "copyID" is zero for a full copy or the ID for when a
16614  * reference to an already copied list/dict can be used.
16615  * Returns FAIL or OK.
16616  */
16617     static int
16618 item_copy(from, to, deep, copyID)
16619     typval_T	*from;
16620     typval_T	*to;
16621     int		deep;
16622     int		copyID;
16623 {
16624     static int	recurse = 0;
16625     int		ret = OK;
16626 
16627     if (recurse >= DICT_MAXNEST)
16628     {
16629 	EMSG(_("E698: variable nested too deep for making a copy"));
16630 	return FAIL;
16631     }
16632     ++recurse;
16633 
16634     switch (from->v_type)
16635     {
16636 	case VAR_NUMBER:
16637 	case VAR_STRING:
16638 	case VAR_FUNC:
16639 	    copy_tv(from, to);
16640 	    break;
16641 	case VAR_LIST:
16642 	    to->v_type = VAR_LIST;
16643 	    to->v_lock = 0;
16644 	    if (from->vval.v_list == NULL)
16645 		to->vval.v_list = NULL;
16646 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
16647 	    {
16648 		/* use the copy made earlier */
16649 		to->vval.v_list = from->vval.v_list->lv_copylist;
16650 		++to->vval.v_list->lv_refcount;
16651 	    }
16652 	    else
16653 		to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
16654 	    if (to->vval.v_list == NULL)
16655 		ret = FAIL;
16656 	    break;
16657 	case VAR_DICT:
16658 	    to->v_type = VAR_DICT;
16659 	    to->v_lock = 0;
16660 	    if (from->vval.v_dict == NULL)
16661 		to->vval.v_dict = NULL;
16662 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
16663 	    {
16664 		/* use the copy made earlier */
16665 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
16666 		++to->vval.v_dict->dv_refcount;
16667 	    }
16668 	    else
16669 		to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
16670 	    if (to->vval.v_dict == NULL)
16671 		ret = FAIL;
16672 	    break;
16673 	default:
16674 	    EMSG2(_(e_intern2), "item_copy()");
16675 	    ret = FAIL;
16676     }
16677     --recurse;
16678     return ret;
16679 }
16680 
16681 /*
16682  * ":echo expr1 ..."	print each argument separated with a space, add a
16683  *			newline at the end.
16684  * ":echon expr1 ..."	print each argument plain.
16685  */
16686     void
16687 ex_echo(eap)
16688     exarg_T	*eap;
16689 {
16690     char_u	*arg = eap->arg;
16691     typval_T	rettv;
16692     char_u	*tofree;
16693     char_u	*p;
16694     int		needclr = TRUE;
16695     int		atstart = TRUE;
16696     char_u	numbuf[NUMBUFLEN];
16697 
16698     if (eap->skip)
16699 	++emsg_skip;
16700     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
16701     {
16702 	p = arg;
16703 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16704 	{
16705 	    /*
16706 	     * Report the invalid expression unless the expression evaluation
16707 	     * has been cancelled due to an aborting error, an interrupt, or an
16708 	     * exception.
16709 	     */
16710 	    if (!aborting())
16711 		EMSG2(_(e_invexpr2), p);
16712 	    break;
16713 	}
16714 	if (!eap->skip)
16715 	{
16716 	    if (atstart)
16717 	    {
16718 		atstart = FALSE;
16719 		/* Call msg_start() after eval1(), evaluating the expression
16720 		 * may cause a message to appear. */
16721 		if (eap->cmdidx == CMD_echo)
16722 		    msg_start();
16723 	    }
16724 	    else if (eap->cmdidx == CMD_echo)
16725 		msg_puts_attr((char_u *)" ", echo_attr);
16726 	    p = echo_string(&rettv, &tofree, numbuf);
16727 	    if (p != NULL)
16728 		for ( ; *p != NUL && !got_int; ++p)
16729 		{
16730 		    if (*p == '\n' || *p == '\r' || *p == TAB)
16731 		    {
16732 			if (*p != TAB && needclr)
16733 			{
16734 			    /* remove any text still there from the command */
16735 			    msg_clr_eos();
16736 			    needclr = FALSE;
16737 			}
16738 			msg_putchar_attr(*p, echo_attr);
16739 		    }
16740 		    else
16741 		    {
16742 #ifdef FEAT_MBYTE
16743 			if (has_mbyte)
16744 			{
16745 			    int i = (*mb_ptr2len)(p);
16746 
16747 			    (void)msg_outtrans_len_attr(p, i, echo_attr);
16748 			    p += i - 1;
16749 			}
16750 			else
16751 #endif
16752 			    (void)msg_outtrans_len_attr(p, 1, echo_attr);
16753 		    }
16754 		}
16755 	    vim_free(tofree);
16756 	}
16757 	clear_tv(&rettv);
16758 	arg = skipwhite(arg);
16759     }
16760     eap->nextcmd = check_nextcmd(arg);
16761 
16762     if (eap->skip)
16763 	--emsg_skip;
16764     else
16765     {
16766 	/* remove text that may still be there from the command */
16767 	if (needclr)
16768 	    msg_clr_eos();
16769 	if (eap->cmdidx == CMD_echo)
16770 	    msg_end();
16771     }
16772 }
16773 
16774 /*
16775  * ":echohl {name}".
16776  */
16777     void
16778 ex_echohl(eap)
16779     exarg_T	*eap;
16780 {
16781     int		id;
16782 
16783     id = syn_name2id(eap->arg);
16784     if (id == 0)
16785 	echo_attr = 0;
16786     else
16787 	echo_attr = syn_id2attr(id);
16788 }
16789 
16790 /*
16791  * ":execute expr1 ..."	execute the result of an expression.
16792  * ":echomsg expr1 ..."	Print a message
16793  * ":echoerr expr1 ..."	Print an error
16794  * Each gets spaces around each argument and a newline at the end for
16795  * echo commands
16796  */
16797     void
16798 ex_execute(eap)
16799     exarg_T	*eap;
16800 {
16801     char_u	*arg = eap->arg;
16802     typval_T	rettv;
16803     int		ret = OK;
16804     char_u	*p;
16805     garray_T	ga;
16806     int		len;
16807     int		save_did_emsg;
16808 
16809     ga_init2(&ga, 1, 80);
16810 
16811     if (eap->skip)
16812 	++emsg_skip;
16813     while (*arg != NUL && *arg != '|' && *arg != '\n')
16814     {
16815 	p = arg;
16816 	if (eval1(&arg, &rettv, !eap->skip) == FAIL)
16817 	{
16818 	    /*
16819 	     * Report the invalid expression unless the expression evaluation
16820 	     * has been cancelled due to an aborting error, an interrupt, or an
16821 	     * exception.
16822 	     */
16823 	    if (!aborting())
16824 		EMSG2(_(e_invexpr2), p);
16825 	    ret = FAIL;
16826 	    break;
16827 	}
16828 
16829 	if (!eap->skip)
16830 	{
16831 	    p = get_tv_string(&rettv);
16832 	    len = (int)STRLEN(p);
16833 	    if (ga_grow(&ga, len + 2) == FAIL)
16834 	    {
16835 		clear_tv(&rettv);
16836 		ret = FAIL;
16837 		break;
16838 	    }
16839 	    if (ga.ga_len)
16840 		((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
16841 	    STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
16842 	    ga.ga_len += len;
16843 	}
16844 
16845 	clear_tv(&rettv);
16846 	arg = skipwhite(arg);
16847     }
16848 
16849     if (ret != FAIL && ga.ga_data != NULL)
16850     {
16851 	if (eap->cmdidx == CMD_echomsg)
16852 	    MSG_ATTR(ga.ga_data, echo_attr);
16853 	else if (eap->cmdidx == CMD_echoerr)
16854 	{
16855 	    /* We don't want to abort following commands, restore did_emsg. */
16856 	    save_did_emsg = did_emsg;
16857 	    EMSG((char_u *)ga.ga_data);
16858 	    if (!force_abort)
16859 		did_emsg = save_did_emsg;
16860 	}
16861 	else if (eap->cmdidx == CMD_execute)
16862 	    do_cmdline((char_u *)ga.ga_data,
16863 		       eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
16864     }
16865 
16866     ga_clear(&ga);
16867 
16868     if (eap->skip)
16869 	--emsg_skip;
16870 
16871     eap->nextcmd = check_nextcmd(arg);
16872 }
16873 
16874 /*
16875  * Skip over the name of an option: "&option", "&g:option" or "&l:option".
16876  * "arg" points to the "&" or '+' when called, to "option" when returning.
16877  * Returns NULL when no option name found.  Otherwise pointer to the char
16878  * after the option name.
16879  */
16880     static char_u *
16881 find_option_end(arg, opt_flags)
16882     char_u	**arg;
16883     int		*opt_flags;
16884 {
16885     char_u	*p = *arg;
16886 
16887     ++p;
16888     if (*p == 'g' && p[1] == ':')
16889     {
16890 	*opt_flags = OPT_GLOBAL;
16891 	p += 2;
16892     }
16893     else if (*p == 'l' && p[1] == ':')
16894     {
16895 	*opt_flags = OPT_LOCAL;
16896 	p += 2;
16897     }
16898     else
16899 	*opt_flags = 0;
16900 
16901     if (!ASCII_ISALPHA(*p))
16902 	return NULL;
16903     *arg = p;
16904 
16905     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
16906 	p += 4;	    /* termcap option */
16907     else
16908 	while (ASCII_ISALPHA(*p))
16909 	    ++p;
16910     return p;
16911 }
16912 
16913 /*
16914  * ":function"
16915  */
16916     void
16917 ex_function(eap)
16918     exarg_T	*eap;
16919 {
16920     char_u	*theline;
16921     int		j;
16922     int		c;
16923     int		saved_did_emsg;
16924     char_u	*name = NULL;
16925     char_u	*p;
16926     char_u	*arg;
16927     garray_T	newargs;
16928     garray_T	newlines;
16929     int		varargs = FALSE;
16930     int		mustend = FALSE;
16931     int		flags = 0;
16932     ufunc_T	*fp;
16933     int		indent;
16934     int		nesting;
16935     char_u	*skip_until = NULL;
16936     dictitem_T	*v;
16937     funcdict_T	fudi;
16938     static int	func_nr = 0;	    /* number for nameless function */
16939     int		paren;
16940     hashtab_T	*ht;
16941     int		todo;
16942     hashitem_T	*hi;
16943 
16944     /*
16945      * ":function" without argument: list functions.
16946      */
16947     if (ends_excmd(*eap->arg))
16948     {
16949 	if (!eap->skip)
16950 	{
16951 	    todo = func_hashtab.ht_used;
16952 	    for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16953 	    {
16954 		if (!HASHITEM_EMPTY(hi))
16955 		{
16956 		    --todo;
16957 		    fp = HI2UF(hi);
16958 		    if (!isdigit(*fp->uf_name))
16959 			list_func_head(fp, FALSE);
16960 		}
16961 	    }
16962 	}
16963 	eap->nextcmd = check_nextcmd(eap->arg);
16964 	return;
16965     }
16966 
16967     /*
16968      * ":function /pat": list functions matching pattern.
16969      */
16970     if (*eap->arg == '/')
16971     {
16972 	p = skip_regexp(eap->arg + 1, '/', TRUE, NULL);
16973 	if (!eap->skip)
16974 	{
16975 	    regmatch_T	regmatch;
16976 
16977 	    c = *p;
16978 	    *p = NUL;
16979 	    regmatch.regprog = vim_regcomp(eap->arg + 1, RE_MAGIC);
16980 	    *p = c;
16981 	    if (regmatch.regprog != NULL)
16982 	    {
16983 		regmatch.rm_ic = p_ic;
16984 
16985 		todo = func_hashtab.ht_used;
16986 		for (hi = func_hashtab.ht_array; todo > 0 && !got_int; ++hi)
16987 		{
16988 		    if (!HASHITEM_EMPTY(hi))
16989 		    {
16990 			--todo;
16991 			fp = HI2UF(hi);
16992 			if (!isdigit(*fp->uf_name)
16993 				    && vim_regexec(&regmatch, fp->uf_name, 0))
16994 			    list_func_head(fp, FALSE);
16995 		    }
16996 		}
16997 	    }
16998 	}
16999 	if (*p == '/')
17000 	    ++p;
17001 	eap->nextcmd = check_nextcmd(p);
17002 	return;
17003     }
17004 
17005     /*
17006      * Get the function name.  There are these situations:
17007      * func	    normal function name
17008      *		    "name" == func, "fudi.fd_dict" == NULL
17009      * dict.func    new dictionary entry
17010      *		    "name" == NULL, "fudi.fd_dict" set,
17011      *		    "fudi.fd_di" == NULL, "fudi.fd_newkey" == func
17012      * dict.func    existing dict entry with a Funcref
17013      *		    "name" == func, "fudi.fd_dict" set,
17014      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
17015      * dict.func    existing dict entry that's not a Funcref
17016      *		    "name" == NULL, "fudi.fd_dict" set,
17017      *		    "fudi.fd_di" set, "fudi.fd_newkey" == NULL
17018      */
17019     p = eap->arg;
17020     name = trans_function_name(&p, eap->skip, 0, &fudi);
17021     paren = (vim_strchr(p, '(') != NULL);
17022     if (name == NULL && (fudi.fd_dict == NULL || !paren) && !eap->skip)
17023     {
17024 	/*
17025 	 * Return on an invalid expression in braces, unless the expression
17026 	 * evaluation has been cancelled due to an aborting error, an
17027 	 * interrupt, or an exception.
17028 	 */
17029 	if (!aborting())
17030 	{
17031 	    if (!eap->skip && fudi.fd_newkey != NULL)
17032 		EMSG2(_(e_dictkey), fudi.fd_newkey);
17033 	    vim_free(fudi.fd_newkey);
17034 	    return;
17035 	}
17036 	else
17037 	    eap->skip = TRUE;
17038     }
17039     /* An error in a function call during evaluation of an expression in magic
17040      * braces should not cause the function not to be defined. */
17041     saved_did_emsg = did_emsg;
17042     did_emsg = FALSE;
17043 
17044     /*
17045      * ":function func" with only function name: list function.
17046      */
17047     if (!paren)
17048     {
17049 	if (!ends_excmd(*skipwhite(p)))
17050 	{
17051 	    EMSG(_(e_trailing));
17052 	    goto ret_free;
17053 	}
17054 	eap->nextcmd = check_nextcmd(p);
17055 	if (eap->nextcmd != NULL)
17056 	    *p = NUL;
17057 	if (!eap->skip && !got_int)
17058 	{
17059 	    fp = find_func(name);
17060 	    if (fp != NULL)
17061 	    {
17062 		list_func_head(fp, TRUE);
17063 		for (j = 0; j < fp->uf_lines.ga_len && !got_int; ++j)
17064 		{
17065 		    msg_putchar('\n');
17066 		    msg_outnum((long)(j + 1));
17067 		    if (j < 9)
17068 			msg_putchar(' ');
17069 		    if (j < 99)
17070 			msg_putchar(' ');
17071 		    msg_prt_line(FUNCLINE(fp, j), FALSE);
17072 		    out_flush();	/* show a line at a time */
17073 		    ui_breakcheck();
17074 		}
17075 		if (!got_int)
17076 		{
17077 		    msg_putchar('\n');
17078 		    msg_puts((char_u *)"   endfunction");
17079 		}
17080 	    }
17081 	    else
17082 		emsg_funcname("E123: Undefined function: %s", name);
17083 	}
17084 	goto ret_free;
17085     }
17086 
17087     /*
17088      * ":function name(arg1, arg2)" Define function.
17089      */
17090     p = skipwhite(p);
17091     if (*p != '(')
17092     {
17093 	if (!eap->skip)
17094 	{
17095 	    EMSG2(_("E124: Missing '(': %s"), eap->arg);
17096 	    goto ret_free;
17097 	}
17098 	/* attempt to continue by skipping some text */
17099 	if (vim_strchr(p, '(') != NULL)
17100 	    p = vim_strchr(p, '(');
17101     }
17102     p = skipwhite(p + 1);
17103 
17104     ga_init2(&newargs, (int)sizeof(char_u *), 3);
17105     ga_init2(&newlines, (int)sizeof(char_u *), 3);
17106 
17107     if (!eap->skip)
17108     {
17109 	/* Check the name of the function. */
17110 	if (name != NULL)
17111 	    arg = name;
17112 	else
17113 	    arg = fudi.fd_newkey;
17114 	if (arg != NULL)
17115 	{
17116 	    if (*arg == K_SPECIAL)
17117 		j = 3;
17118 	    else
17119 		j = 0;
17120 	    while (arg[j] != NUL && (j == 0 ? eval_isnamec1(arg[j])
17121 						      : eval_isnamec(arg[j])))
17122 		++j;
17123 	    if (arg[j] != NUL)
17124 		emsg_funcname(_(e_invarg2), arg);
17125 	}
17126     }
17127 
17128     /*
17129      * Isolate the arguments: "arg1, arg2, ...)"
17130      */
17131     while (*p != ')')
17132     {
17133 	if (p[0] == '.' && p[1] == '.' && p[2] == '.')
17134 	{
17135 	    varargs = TRUE;
17136 	    p += 3;
17137 	    mustend = TRUE;
17138 	}
17139 	else
17140 	{
17141 	    arg = p;
17142 	    while (ASCII_ISALNUM(*p) || *p == '_')
17143 		++p;
17144 	    if (arg == p || isdigit(*arg)
17145 		    || (p - arg == 9 && STRNCMP(arg, "firstline", 9) == 0)
17146 		    || (p - arg == 8 && STRNCMP(arg, "lastline", 8) == 0))
17147 	    {
17148 		if (!eap->skip)
17149 		    EMSG2(_("E125: Illegal argument: %s"), arg);
17150 		break;
17151 	    }
17152 	    if (ga_grow(&newargs, 1) == FAIL)
17153 		goto erret;
17154 	    c = *p;
17155 	    *p = NUL;
17156 	    arg = vim_strsave(arg);
17157 	    if (arg == NULL)
17158 		goto erret;
17159 	    ((char_u **)(newargs.ga_data))[newargs.ga_len] = arg;
17160 	    *p = c;
17161 	    newargs.ga_len++;
17162 	    if (*p == ',')
17163 		++p;
17164 	    else
17165 		mustend = TRUE;
17166 	}
17167 	p = skipwhite(p);
17168 	if (mustend && *p != ')')
17169 	{
17170 	    if (!eap->skip)
17171 		EMSG2(_(e_invarg2), eap->arg);
17172 	    break;
17173 	}
17174     }
17175     ++p;	/* skip the ')' */
17176 
17177     /* find extra arguments "range", "dict" and "abort" */
17178     for (;;)
17179     {
17180 	p = skipwhite(p);
17181 	if (STRNCMP(p, "range", 5) == 0)
17182 	{
17183 	    flags |= FC_RANGE;
17184 	    p += 5;
17185 	}
17186 	else if (STRNCMP(p, "dict", 4) == 0)
17187 	{
17188 	    flags |= FC_DICT;
17189 	    p += 4;
17190 	}
17191 	else if (STRNCMP(p, "abort", 5) == 0)
17192 	{
17193 	    flags |= FC_ABORT;
17194 	    p += 5;
17195 	}
17196 	else
17197 	    break;
17198     }
17199 
17200     if (*p != NUL && *p != '"' && *p != '\n' && !eap->skip && !did_emsg)
17201 	EMSG(_(e_trailing));
17202 
17203     /*
17204      * Read the body of the function, until ":endfunction" is found.
17205      */
17206     if (KeyTyped)
17207     {
17208 	/* Check if the function already exists, don't let the user type the
17209 	 * whole function before telling him it doesn't work!  For a script we
17210 	 * need to skip the body to be able to find what follows. */
17211 	if (!eap->skip && !eap->forceit)
17212 	{
17213 	    if (fudi.fd_dict != NULL && fudi.fd_newkey == NULL)
17214 		EMSG(_(e_funcdict));
17215 	    else if (name != NULL && find_func(name) != NULL)
17216 		emsg_funcname(e_funcexts, name);
17217 	}
17218 
17219 	if (!eap->skip && did_emsg)
17220 	    goto erret;
17221 
17222 	msg_putchar('\n');	    /* don't overwrite the function name */
17223 	cmdline_row = msg_row;
17224     }
17225 
17226     indent = 2;
17227     nesting = 0;
17228     for (;;)
17229     {
17230 	msg_scroll = TRUE;
17231 	need_wait_return = FALSE;
17232 	if (eap->getline == NULL)
17233 	    theline = getcmdline(':', 0L, indent);
17234 	else
17235 	    theline = eap->getline(':', eap->cookie, indent);
17236 	if (KeyTyped)
17237 	    lines_left = Rows - 1;
17238 	if (theline == NULL)
17239 	{
17240 	    EMSG(_("E126: Missing :endfunction"));
17241 	    goto erret;
17242 	}
17243 
17244 	if (skip_until != NULL)
17245 	{
17246 	    /* between ":append" and "." and between ":python <<EOF" and "EOF"
17247 	     * don't check for ":endfunc". */
17248 	    if (STRCMP(theline, skip_until) == 0)
17249 	    {
17250 		vim_free(skip_until);
17251 		skip_until = NULL;
17252 	    }
17253 	}
17254 	else
17255 	{
17256 	    /* skip ':' and blanks*/
17257 	    for (p = theline; vim_iswhite(*p) || *p == ':'; ++p)
17258 		;
17259 
17260 	    /* Check for "endfunction". */
17261 	    if (checkforcmd(&p, "endfunction", 4) && nesting-- == 0)
17262 	    {
17263 		vim_free(theline);
17264 		break;
17265 	    }
17266 
17267 	    /* Increase indent inside "if", "while", "for" and "try", decrease
17268 	     * at "end". */
17269 	    if (indent > 2 && STRNCMP(p, "end", 3) == 0)
17270 		indent -= 2;
17271 	    else if (STRNCMP(p, "if", 2) == 0
17272 		    || STRNCMP(p, "wh", 2) == 0
17273 		    || STRNCMP(p, "for", 3) == 0
17274 		    || STRNCMP(p, "try", 3) == 0)
17275 		indent += 2;
17276 
17277 	    /* Check for defining a function inside this function. */
17278 	    if (checkforcmd(&p, "function", 2))
17279 	    {
17280 		if (*p == '!')
17281 		    p = skipwhite(p + 1);
17282 		p += eval_fname_script(p);
17283 		if (ASCII_ISALPHA(*p))
17284 		{
17285 		    vim_free(trans_function_name(&p, TRUE, 0, NULL));
17286 		    if (*skipwhite(p) == '(')
17287 		    {
17288 			++nesting;
17289 			indent += 2;
17290 		    }
17291 		}
17292 	    }
17293 
17294 	    /* Check for ":append" or ":insert". */
17295 	    p = skip_range(p, NULL);
17296 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
17297 		    || (p[0] == 'i'
17298 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
17299 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))
17300 		skip_until = vim_strsave((char_u *)".");
17301 
17302 	    /* Check for ":python <<EOF", ":tcl <<EOF", etc. */
17303 	    arg = skipwhite(skiptowhite(p));
17304 	    if (arg[0] == '<' && arg[1] =='<'
17305 		    && ((p[0] == 'p' && p[1] == 'y'
17306 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 't'))
17307 			|| (p[0] == 'p' && p[1] == 'e'
17308 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'r'))
17309 			|| (p[0] == 't' && p[1] == 'c'
17310 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 'l'))
17311 			|| (p[0] == 'r' && p[1] == 'u' && p[2] == 'b'
17312 				    && (!ASCII_ISALPHA(p[3]) || p[3] == 'y'))
17313 			|| (p[0] == 'm' && p[1] == 'z'
17314 				    && (!ASCII_ISALPHA(p[2]) || p[2] == 's'))
17315 			))
17316 	    {
17317 		/* ":python <<" continues until a dot, like ":append" */
17318 		p = skipwhite(arg + 2);
17319 		if (*p == NUL)
17320 		    skip_until = vim_strsave((char_u *)".");
17321 		else
17322 		    skip_until = vim_strsave(p);
17323 	    }
17324 	}
17325 
17326 	/* Add the line to the function. */
17327 	if (ga_grow(&newlines, 1) == FAIL)
17328 	{
17329 	    vim_free(theline);
17330 	    goto erret;
17331 	}
17332 
17333 	/* Copy the line to newly allocated memory.  get_one_sourceline()
17334 	 * allocates 250 bytes per line, this saves 80% on average.  The cost
17335 	 * is an extra alloc/free. */
17336 	p = vim_strsave(theline);
17337 	if (p != NULL)
17338 	{
17339 	    vim_free(theline);
17340 	    theline = p;
17341 	}
17342 
17343 	((char_u **)(newlines.ga_data))[newlines.ga_len] = theline;
17344 	newlines.ga_len++;
17345     }
17346 
17347     /* Don't define the function when skipping commands or when an error was
17348      * detected. */
17349     if (eap->skip || did_emsg)
17350 	goto erret;
17351 
17352     /*
17353      * If there are no errors, add the function
17354      */
17355     if (fudi.fd_dict == NULL)
17356     {
17357 	v = find_var(name, &ht);
17358 	if (v != NULL && v->di_tv.v_type == VAR_FUNC)
17359 	{
17360 	    emsg_funcname("E707: Function name conflicts with variable: %s",
17361 									name);
17362 	    goto erret;
17363 	}
17364 
17365 	fp = find_func(name);
17366 	if (fp != NULL)
17367 	{
17368 	    if (!eap->forceit)
17369 	    {
17370 		emsg_funcname(e_funcexts, name);
17371 		goto erret;
17372 	    }
17373 	    if (fp->uf_calls > 0)
17374 	    {
17375 		emsg_funcname("E127: Cannot redefine function %s: It is in use",
17376 									name);
17377 		goto erret;
17378 	    }
17379 	    /* redefine existing function */
17380 	    ga_clear_strings(&(fp->uf_args));
17381 	    ga_clear_strings(&(fp->uf_lines));
17382 	    vim_free(name);
17383 	    name = NULL;
17384 	}
17385     }
17386     else
17387     {
17388 	char	numbuf[20];
17389 
17390 	fp = NULL;
17391 	if (fudi.fd_newkey == NULL && !eap->forceit)
17392 	{
17393 	    EMSG(_(e_funcdict));
17394 	    goto erret;
17395 	}
17396 	if (fudi.fd_di == NULL)
17397 	{
17398 	    /* Can't add a function to a locked dictionary */
17399 	    if (tv_check_lock(fudi.fd_dict->dv_lock, eap->arg))
17400 		goto erret;
17401 	}
17402 	    /* Can't change an existing function if it is locked */
17403 	else if (tv_check_lock(fudi.fd_di->di_tv.v_lock, eap->arg))
17404 	    goto erret;
17405 
17406 	/* Give the function a sequential number.  Can only be used with a
17407 	 * Funcref! */
17408 	vim_free(name);
17409 	sprintf(numbuf, "%d", ++func_nr);
17410 	name = vim_strsave((char_u *)numbuf);
17411 	if (name == NULL)
17412 	    goto erret;
17413     }
17414 
17415     if (fp == NULL)
17416     {
17417 	if (fudi.fd_dict == NULL && vim_strchr(name, AUTOLOAD_CHAR) != NULL)
17418 	{
17419 	    int	    slen, plen;
17420 	    char_u  *scriptname;
17421 
17422 	    /* Check that the autoload name matches the script name. */
17423 	    j = FAIL;
17424 	    if (sourcing_name != NULL)
17425 	    {
17426 		scriptname = autoload_name(name);
17427 		if (scriptname != NULL)
17428 		{
17429 		    p = vim_strchr(scriptname, '/');
17430 		    plen = STRLEN(p);
17431 		    slen = STRLEN(sourcing_name);
17432 		    if (slen > plen && fnamecmp(p,
17433 					    sourcing_name + slen - plen) == 0)
17434 			j = OK;
17435 		    vim_free(scriptname);
17436 		}
17437 	    }
17438 	    if (j == FAIL)
17439 	    {
17440 		EMSG2(_("E746: Function name does not match script file name: %s"), name);
17441 		goto erret;
17442 	    }
17443 	}
17444 
17445 	fp = (ufunc_T *)alloc((unsigned)(sizeof(ufunc_T) + STRLEN(name)));
17446 	if (fp == NULL)
17447 	    goto erret;
17448 
17449 	if (fudi.fd_dict != NULL)
17450 	{
17451 	    if (fudi.fd_di == NULL)
17452 	    {
17453 		/* add new dict entry */
17454 		fudi.fd_di = dictitem_alloc(fudi.fd_newkey);
17455 		if (fudi.fd_di == NULL)
17456 		{
17457 		    vim_free(fp);
17458 		    goto erret;
17459 		}
17460 		if (dict_add(fudi.fd_dict, fudi.fd_di) == FAIL)
17461 		{
17462 		    vim_free(fudi.fd_di);
17463 		    goto erret;
17464 		}
17465 	    }
17466 	    else
17467 		/* overwrite existing dict entry */
17468 		clear_tv(&fudi.fd_di->di_tv);
17469 	    fudi.fd_di->di_tv.v_type = VAR_FUNC;
17470 	    fudi.fd_di->di_tv.v_lock = 0;
17471 	    fudi.fd_di->di_tv.vval.v_string = vim_strsave(name);
17472 	    fp->uf_refcount = 1;
17473 	}
17474 
17475 	/* insert the new function in the function list */
17476 	STRCPY(fp->uf_name, name);
17477 	hash_add(&func_hashtab, UF2HIKEY(fp));
17478     }
17479     fp->uf_args = newargs;
17480     fp->uf_lines = newlines;
17481 #ifdef FEAT_PROFILE
17482     fp->uf_tml_count = NULL;
17483     fp->uf_tml_total = NULL;
17484     fp->uf_tml_self = NULL;
17485     fp->uf_profiling = FALSE;
17486     if (prof_def_func())
17487 	func_do_profile(fp);
17488 #endif
17489     fp->uf_varargs = varargs;
17490     fp->uf_flags = flags;
17491     fp->uf_calls = 0;
17492     fp->uf_script_ID = current_SID;
17493     goto ret_free;
17494 
17495 erret:
17496     ga_clear_strings(&newargs);
17497     ga_clear_strings(&newlines);
17498 ret_free:
17499     vim_free(skip_until);
17500     vim_free(fudi.fd_newkey);
17501     vim_free(name);
17502     did_emsg |= saved_did_emsg;
17503 }
17504 
17505 /*
17506  * Get a function name, translating "<SID>" and "<SNR>".
17507  * Also handles a Funcref in a List or Dictionary.
17508  * Returns the function name in allocated memory, or NULL for failure.
17509  * flags:
17510  * TFN_INT:   internal function name OK
17511  * TFN_QUIET: be quiet
17512  * Advances "pp" to just after the function name (if no error).
17513  */
17514     static char_u *
17515 trans_function_name(pp, skip, flags, fdp)
17516     char_u	**pp;
17517     int		skip;		/* only find the end, don't evaluate */
17518     int		flags;
17519     funcdict_T	*fdp;		/* return: info about dictionary used */
17520 {
17521     char_u	*name = NULL;
17522     char_u	*start;
17523     char_u	*end;
17524     int		lead;
17525     char_u	sid_buf[20];
17526     int		len;
17527     lval_T	lv;
17528 
17529     if (fdp != NULL)
17530 	vim_memset(fdp, 0, sizeof(funcdict_T));
17531     start = *pp;
17532 
17533     /* Check for hard coded <SNR>: already translated function ID (from a user
17534      * command). */
17535     if ((*pp)[0] == K_SPECIAL && (*pp)[1] == KS_EXTRA
17536 						   && (*pp)[2] == (int)KE_SNR)
17537     {
17538 	*pp += 3;
17539 	len = get_id_len(pp) + 3;
17540 	return vim_strnsave(start, len);
17541     }
17542 
17543     /* A name starting with "<SID>" or "<SNR>" is local to a script.  But
17544      * don't skip over "s:", get_lval() needs it for "s:dict.func". */
17545     lead = eval_fname_script(start);
17546     if (lead > 2)
17547 	start += lead;
17548 
17549     end = get_lval(start, NULL, &lv, FALSE, skip, flags & TFN_QUIET,
17550 					      lead > 2 ? 0 : FNE_CHECK_START);
17551     if (end == start)
17552     {
17553 	if (!skip)
17554 	    EMSG(_("E129: Function name required"));
17555 	goto theend;
17556     }
17557     if (end == NULL || (lv.ll_tv != NULL && (lead > 2 || lv.ll_range)))
17558     {
17559 	/*
17560 	 * Report an invalid expression in braces, unless the expression
17561 	 * evaluation has been cancelled due to an aborting error, an
17562 	 * interrupt, or an exception.
17563 	 */
17564 	if (!aborting())
17565 	{
17566 	    if (end != NULL)
17567 		EMSG2(_(e_invarg2), start);
17568 	}
17569 	else
17570 	    *pp = find_name_end(start, NULL, NULL, FNE_INCL_BR);
17571 	goto theend;
17572     }
17573 
17574     if (lv.ll_tv != NULL)
17575     {
17576 	if (fdp != NULL)
17577 	{
17578 	    fdp->fd_dict = lv.ll_dict;
17579 	    fdp->fd_newkey = lv.ll_newkey;
17580 	    lv.ll_newkey = NULL;
17581 	    fdp->fd_di = lv.ll_di;
17582 	}
17583 	if (lv.ll_tv->v_type == VAR_FUNC && lv.ll_tv->vval.v_string != NULL)
17584 	{
17585 	    name = vim_strsave(lv.ll_tv->vval.v_string);
17586 	    *pp = end;
17587 	}
17588 	else
17589 	{
17590 	    if (!skip && !(flags & TFN_QUIET) && (fdp == NULL
17591 			     || lv.ll_dict == NULL || fdp->fd_newkey == NULL))
17592 		EMSG(_(e_funcref));
17593 	    else
17594 		*pp = end;
17595 	    name = NULL;
17596 	}
17597 	goto theend;
17598     }
17599 
17600     if (lv.ll_name == NULL)
17601     {
17602 	/* Error found, but continue after the function name. */
17603 	*pp = end;
17604 	goto theend;
17605     }
17606 
17607     if (lv.ll_exp_name != NULL)
17608 	len = STRLEN(lv.ll_exp_name);
17609     else
17610     {
17611 	if (lead == 2)	/* skip over "s:" */
17612 	    lv.ll_name += 2;
17613 	len = (int)(end - lv.ll_name);
17614     }
17615 
17616     /*
17617      * Copy the function name to allocated memory.
17618      * Accept <SID>name() inside a script, translate into <SNR>123_name().
17619      * Accept <SNR>123_name() outside a script.
17620      */
17621     if (skip)
17622 	lead = 0;	/* do nothing */
17623     else if (lead > 0)
17624     {
17625 	lead = 3;
17626 	if (eval_fname_sid(*pp))	/* If it's "<SID>" */
17627 	{
17628 	    if (current_SID <= 0)
17629 	    {
17630 		EMSG(_(e_usingsid));
17631 		goto theend;
17632 	    }
17633 	    sprintf((char *)sid_buf, "%ld_", (long)current_SID);
17634 	    lead += (int)STRLEN(sid_buf);
17635 	}
17636     }
17637     else if (!(flags & TFN_INT) && builtin_function(lv.ll_name))
17638     {
17639 	EMSG2(_("E128: Function name must start with a capital or contain a colon: %s"), lv.ll_name);
17640 	goto theend;
17641     }
17642     name = alloc((unsigned)(len + lead + 1));
17643     if (name != NULL)
17644     {
17645 	if (lead > 0)
17646 	{
17647 	    name[0] = K_SPECIAL;
17648 	    name[1] = KS_EXTRA;
17649 	    name[2] = (int)KE_SNR;
17650 	    if (lead > 3)	/* If it's "<SID>" */
17651 		STRCPY(name + 3, sid_buf);
17652 	}
17653 	mch_memmove(name + lead, lv.ll_name, (size_t)len);
17654 	name[len + lead] = NUL;
17655     }
17656     *pp = end;
17657 
17658 theend:
17659     clear_lval(&lv);
17660     return name;
17661 }
17662 
17663 /*
17664  * Return 5 if "p" starts with "<SID>" or "<SNR>" (ignoring case).
17665  * Return 2 if "p" starts with "s:".
17666  * Return 0 otherwise.
17667  */
17668     static int
17669 eval_fname_script(p)
17670     char_u	*p;
17671 {
17672     if (p[0] == '<' && (STRNICMP(p + 1, "SID>", 4) == 0
17673 					  || STRNICMP(p + 1, "SNR>", 4) == 0))
17674 	return 5;
17675     if (p[0] == 's' && p[1] == ':')
17676 	return 2;
17677     return 0;
17678 }
17679 
17680 /*
17681  * Return TRUE if "p" starts with "<SID>" or "s:".
17682  * Only works if eval_fname_script() returned non-zero for "p"!
17683  */
17684     static int
17685 eval_fname_sid(p)
17686     char_u	*p;
17687 {
17688     return (*p == 's' || TOUPPER_ASC(p[2]) == 'I');
17689 }
17690 
17691 /*
17692  * List the head of the function: "name(arg1, arg2)".
17693  */
17694     static void
17695 list_func_head(fp, indent)
17696     ufunc_T	*fp;
17697     int		indent;
17698 {
17699     int		j;
17700 
17701     msg_start();
17702     if (indent)
17703 	MSG_PUTS("   ");
17704     MSG_PUTS("function ");
17705     if (fp->uf_name[0] == K_SPECIAL)
17706     {
17707 	MSG_PUTS_ATTR("<SNR>", hl_attr(HLF_8));
17708 	msg_puts(fp->uf_name + 3);
17709     }
17710     else
17711 	msg_puts(fp->uf_name);
17712     msg_putchar('(');
17713     for (j = 0; j < fp->uf_args.ga_len; ++j)
17714     {
17715 	if (j)
17716 	    MSG_PUTS(", ");
17717 	msg_puts(FUNCARG(fp, j));
17718     }
17719     if (fp->uf_varargs)
17720     {
17721 	if (j)
17722 	    MSG_PUTS(", ");
17723 	MSG_PUTS("...");
17724     }
17725     msg_putchar(')');
17726     msg_clr_eos();
17727     if (p_verbose > 0)
17728 	last_set_msg(fp->uf_script_ID);
17729 }
17730 
17731 /*
17732  * Find a function by name, return pointer to it in ufuncs.
17733  * Return NULL for unknown function.
17734  */
17735     static ufunc_T *
17736 find_func(name)
17737     char_u	*name;
17738 {
17739     hashitem_T	*hi;
17740 
17741     hi = hash_find(&func_hashtab, name);
17742     if (!HASHITEM_EMPTY(hi))
17743 	return HI2UF(hi);
17744     return NULL;
17745 }
17746 
17747 #if defined(EXITFREE) || defined(PROTO)
17748     void
17749 free_all_functions()
17750 {
17751     hashitem_T	*hi;
17752 
17753     /* Need to start all over every time, because func_free() may change the
17754      * hash table. */
17755     while (func_hashtab.ht_used > 0)
17756 	for (hi = func_hashtab.ht_array; ; ++hi)
17757 	    if (!HASHITEM_EMPTY(hi))
17758 	    {
17759 		func_free(HI2UF(hi));
17760 		break;
17761 	    }
17762 }
17763 #endif
17764 
17765 /*
17766  * Return TRUE if a function "name" exists.
17767  */
17768     static int
17769 function_exists(name)
17770     char_u *name;
17771 {
17772     char_u  *p = name;
17773     int	    n = FALSE;
17774 
17775     p = trans_function_name(&p, FALSE, TFN_INT|TFN_QUIET, NULL);
17776     if (p != NULL)
17777     {
17778 	if (builtin_function(p))
17779 	    n = (find_internal_func(p) >= 0);
17780 	else
17781 	    n = (find_func(p) != NULL);
17782 	vim_free(p);
17783     }
17784     return n;
17785 }
17786 
17787 /*
17788  * Return TRUE if "name" looks like a builtin function name: starts with a
17789  * lower case letter and doesn't contain a ':' or AUTOLOAD_CHAR.
17790  */
17791     static int
17792 builtin_function(name)
17793     char_u *name;
17794 {
17795     return ASCII_ISLOWER(name[0]) && vim_strchr(name, ':') == NULL
17796 				   && vim_strchr(name, AUTOLOAD_CHAR) == NULL;
17797 }
17798 
17799 #if defined(FEAT_PROFILE) || defined(PROTO)
17800 /*
17801  * Start profiling function "fp".
17802  */
17803     static void
17804 func_do_profile(fp)
17805     ufunc_T	*fp;
17806 {
17807     fp->uf_tm_count = 0;
17808     profile_zero(&fp->uf_tm_self);
17809     profile_zero(&fp->uf_tm_total);
17810     if (fp->uf_tml_count == NULL)
17811 	fp->uf_tml_count = (int *)alloc_clear((unsigned)
17812 					 (sizeof(int) * fp->uf_lines.ga_len));
17813     if (fp->uf_tml_total == NULL)
17814 	fp->uf_tml_total = (proftime_T *)alloc_clear((unsigned)
17815 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17816     if (fp->uf_tml_self == NULL)
17817 	fp->uf_tml_self = (proftime_T *)alloc_clear((unsigned)
17818 				  (sizeof(proftime_T) * fp->uf_lines.ga_len));
17819     fp->uf_tml_idx = -1;
17820     if (fp->uf_tml_count == NULL || fp->uf_tml_total == NULL
17821 						   || fp->uf_tml_self == NULL)
17822 	return;	    /* out of memory */
17823 
17824     fp->uf_profiling = TRUE;
17825 }
17826 
17827 /*
17828  * Dump the profiling results for all functions in file "fd".
17829  */
17830     void
17831 func_dump_profile(fd)
17832     FILE    *fd;
17833 {
17834     hashitem_T	*hi;
17835     int		todo;
17836     ufunc_T	*fp;
17837     int		i;
17838     ufunc_T	**sorttab;
17839     int		st_len = 0;
17840 
17841     todo = func_hashtab.ht_used;
17842     sorttab = (ufunc_T **)alloc((unsigned)(sizeof(ufunc_T) * todo));
17843 
17844     for (hi = func_hashtab.ht_array; todo > 0; ++hi)
17845     {
17846 	if (!HASHITEM_EMPTY(hi))
17847 	{
17848 	    --todo;
17849 	    fp = HI2UF(hi);
17850 	    if (fp->uf_profiling)
17851 	    {
17852 		if (sorttab != NULL)
17853 		    sorttab[st_len++] = fp;
17854 
17855 		if (fp->uf_name[0] == K_SPECIAL)
17856 		    fprintf(fd, "FUNCTION  <SNR>%s()\n", fp->uf_name + 3);
17857 		else
17858 		    fprintf(fd, "FUNCTION  %s()\n", fp->uf_name);
17859 		if (fp->uf_tm_count == 1)
17860 		    fprintf(fd, "Called 1 time\n");
17861 		else
17862 		    fprintf(fd, "Called %d times\n", fp->uf_tm_count);
17863 		fprintf(fd, "Total time: %s\n", profile_msg(&fp->uf_tm_total));
17864 		fprintf(fd, " Self time: %s\n", profile_msg(&fp->uf_tm_self));
17865 		fprintf(fd, "\n");
17866 		fprintf(fd, "count  total (s)   self (s)\n");
17867 
17868 		for (i = 0; i < fp->uf_lines.ga_len; ++i)
17869 		{
17870 		    prof_func_line(fd, fp->uf_tml_count[i],
17871 			     &fp->uf_tml_total[i], &fp->uf_tml_self[i], TRUE);
17872 		    fprintf(fd, "%s\n", FUNCLINE(fp, i));
17873 		}
17874 		fprintf(fd, "\n");
17875 	    }
17876 	}
17877     }
17878 
17879     if (sorttab != NULL && st_len > 0)
17880     {
17881 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17882 							      prof_total_cmp);
17883 	prof_sort_list(fd, sorttab, st_len, "TOTAL", FALSE);
17884 	qsort((void *)sorttab, (size_t)st_len, sizeof(ufunc_T *),
17885 							      prof_self_cmp);
17886 	prof_sort_list(fd, sorttab, st_len, "SELF", TRUE);
17887     }
17888 }
17889 
17890     static void
17891 prof_sort_list(fd, sorttab, st_len, title, prefer_self)
17892     FILE	*fd;
17893     ufunc_T	**sorttab;
17894     int		st_len;
17895     char	*title;
17896     int		prefer_self;	/* when equal print only self time */
17897 {
17898     int		i;
17899     ufunc_T	*fp;
17900 
17901     fprintf(fd, "FUNCTIONS SORTED ON %s TIME\n", title);
17902     fprintf(fd, "count  total (s)   self (s)  function\n");
17903     for (i = 0; i < 20 && i < st_len; ++i)
17904     {
17905 	fp = sorttab[i];
17906 	prof_func_line(fd, fp->uf_tm_count, &fp->uf_tm_total, &fp->uf_tm_self,
17907 								 prefer_self);
17908 	if (fp->uf_name[0] == K_SPECIAL)
17909 	    fprintf(fd, " <SNR>%s()\n", fp->uf_name + 3);
17910 	else
17911 	    fprintf(fd, " %s()\n", fp->uf_name);
17912     }
17913     fprintf(fd, "\n");
17914 }
17915 
17916 /*
17917  * Print the count and times for one function or function line.
17918  */
17919     static void
17920 prof_func_line(fd, count, total, self, prefer_self)
17921     FILE	*fd;
17922     int		count;
17923     proftime_T	*total;
17924     proftime_T	*self;
17925     int		prefer_self;	/* when equal print only self time */
17926 {
17927     if (count > 0)
17928     {
17929 	fprintf(fd, "%5d ", count);
17930 	if (prefer_self && profile_equal(total, self))
17931 	    fprintf(fd, "           ");
17932 	else
17933 	    fprintf(fd, "%s ", profile_msg(total));
17934 	if (!prefer_self && profile_equal(total, self))
17935 	    fprintf(fd, "           ");
17936 	else
17937 	    fprintf(fd, "%s ", profile_msg(self));
17938     }
17939     else
17940 	fprintf(fd, "                            ");
17941 }
17942 
17943 /*
17944  * Compare function for total time sorting.
17945  */
17946     static int
17947 #ifdef __BORLANDC__
17948 _RTLENTRYF
17949 #endif
17950 prof_total_cmp(s1, s2)
17951     const void	*s1;
17952     const void	*s2;
17953 {
17954     ufunc_T	*p1, *p2;
17955 
17956     p1 = *(ufunc_T **)s1;
17957     p2 = *(ufunc_T **)s2;
17958     return profile_cmp(&p1->uf_tm_total, &p2->uf_tm_total);
17959 }
17960 
17961 /*
17962  * Compare function for self time sorting.
17963  */
17964     static int
17965 #ifdef __BORLANDC__
17966 _RTLENTRYF
17967 #endif
17968 prof_self_cmp(s1, s2)
17969     const void	*s1;
17970     const void	*s2;
17971 {
17972     ufunc_T	*p1, *p2;
17973 
17974     p1 = *(ufunc_T **)s1;
17975     p2 = *(ufunc_T **)s2;
17976     return profile_cmp(&p1->uf_tm_self, &p2->uf_tm_self);
17977 }
17978 
17979 #endif
17980 
17981 /* The names of packages that once were loaded is remembered. */
17982 static garray_T	    ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
17983 
17984 /*
17985  * If "name" has a package name try autoloading the script for it.
17986  * Return TRUE if a package was loaded.
17987  */
17988     static int
17989 script_autoload(name, reload)
17990     char_u	*name;
17991     int		reload;	    /* load script again when already loaded */
17992 {
17993     char_u	*p;
17994     char_u	*scriptname, *tofree;
17995     int		ret = FALSE;
17996     int		i;
17997 
17998     /* If there is no '#' after name[0] there is no package name. */
17999     p = vim_strchr(name, AUTOLOAD_CHAR);
18000     if (p == NULL || p == name)
18001 	return FALSE;
18002 
18003     tofree = scriptname = autoload_name(name);
18004 
18005     /* Find the name in the list of previously loaded package names.  Skip
18006      * "autoload/", it's always the same. */
18007     for (i = 0; i < ga_loaded.ga_len; ++i)
18008 	if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
18009 	    break;
18010     if (!reload && i < ga_loaded.ga_len)
18011 	ret = FALSE;	    /* was loaded already */
18012     else
18013     {
18014 	/* Remember the name if it wasn't loaded already. */
18015 	if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
18016 	{
18017 	    ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
18018 	    tofree = NULL;
18019 	}
18020 
18021 	/* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
18022 	if (source_runtime(scriptname, FALSE) == OK)
18023 	    ret = TRUE;
18024     }
18025 
18026     vim_free(tofree);
18027     return ret;
18028 }
18029 
18030 /*
18031  * Return the autoload script name for a function or variable name.
18032  * Returns NULL when out of memory.
18033  */
18034     static char_u *
18035 autoload_name(name)
18036     char_u	*name;
18037 {
18038     char_u	*p;
18039     char_u	*scriptname;
18040 
18041     /* Get the script file name: replace '#' with '/', append ".vim". */
18042     scriptname = alloc((unsigned)(STRLEN(name) + 14));
18043     if (scriptname == NULL)
18044 	return FALSE;
18045     STRCPY(scriptname, "autoload/");
18046     STRCAT(scriptname, name);
18047     *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
18048     STRCAT(scriptname, ".vim");
18049     while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
18050 	*p = '/';
18051     return scriptname;
18052 }
18053 
18054 #if defined(FEAT_CMDL_COMPL) || defined(PROTO)
18055 
18056 /*
18057  * Function given to ExpandGeneric() to obtain the list of user defined
18058  * function names.
18059  */
18060     char_u *
18061 get_user_func_name(xp, idx)
18062     expand_T	*xp;
18063     int		idx;
18064 {
18065     static long_u	done;
18066     static hashitem_T	*hi;
18067     ufunc_T		*fp;
18068 
18069     if (idx == 0)
18070     {
18071 	done = 0;
18072 	hi = func_hashtab.ht_array;
18073     }
18074     if (done < func_hashtab.ht_used)
18075     {
18076 	if (done++ > 0)
18077 	    ++hi;
18078 	while (HASHITEM_EMPTY(hi))
18079 	    ++hi;
18080 	fp = HI2UF(hi);
18081 
18082 	if (STRLEN(fp->uf_name) + 4 >= IOSIZE)
18083 	    return fp->uf_name;	/* prevents overflow */
18084 
18085 	cat_func_name(IObuff, fp);
18086 	if (xp->xp_context != EXPAND_USER_FUNC)
18087 	{
18088 	    STRCAT(IObuff, "(");
18089 	    if (!fp->uf_varargs && fp->uf_args.ga_len == 0)
18090 		STRCAT(IObuff, ")");
18091 	}
18092 	return IObuff;
18093     }
18094     return NULL;
18095 }
18096 
18097 #endif /* FEAT_CMDL_COMPL */
18098 
18099 /*
18100  * Copy the function name of "fp" to buffer "buf".
18101  * "buf" must be able to hold the function name plus three bytes.
18102  * Takes care of script-local function names.
18103  */
18104     static void
18105 cat_func_name(buf, fp)
18106     char_u	*buf;
18107     ufunc_T	*fp;
18108 {
18109     if (fp->uf_name[0] == K_SPECIAL)
18110     {
18111 	STRCPY(buf, "<SNR>");
18112 	STRCAT(buf, fp->uf_name + 3);
18113     }
18114     else
18115 	STRCPY(buf, fp->uf_name);
18116 }
18117 
18118 /*
18119  * ":delfunction {name}"
18120  */
18121     void
18122 ex_delfunction(eap)
18123     exarg_T	*eap;
18124 {
18125     ufunc_T	*fp = NULL;
18126     char_u	*p;
18127     char_u	*name;
18128     funcdict_T	fudi;
18129 
18130     p = eap->arg;
18131     name = trans_function_name(&p, eap->skip, 0, &fudi);
18132     vim_free(fudi.fd_newkey);
18133     if (name == NULL)
18134     {
18135 	if (fudi.fd_dict != NULL && !eap->skip)
18136 	    EMSG(_(e_funcref));
18137 	return;
18138     }
18139     if (!ends_excmd(*skipwhite(p)))
18140     {
18141 	vim_free(name);
18142 	EMSG(_(e_trailing));
18143 	return;
18144     }
18145     eap->nextcmd = check_nextcmd(p);
18146     if (eap->nextcmd != NULL)
18147 	*p = NUL;
18148 
18149     if (!eap->skip)
18150 	fp = find_func(name);
18151     vim_free(name);
18152 
18153     if (!eap->skip)
18154     {
18155 	if (fp == NULL)
18156 	{
18157 	    EMSG2(_(e_nofunc), eap->arg);
18158 	    return;
18159 	}
18160 	if (fp->uf_calls > 0)
18161 	{
18162 	    EMSG2(_("E131: Cannot delete function %s: It is in use"), eap->arg);
18163 	    return;
18164 	}
18165 
18166 	if (fudi.fd_dict != NULL)
18167 	{
18168 	    /* Delete the dict item that refers to the function, it will
18169 	     * invoke func_unref() and possibly delete the function. */
18170 	    dictitem_remove(fudi.fd_dict, fudi.fd_di);
18171 	}
18172 	else
18173 	    func_free(fp);
18174     }
18175 }
18176 
18177 /*
18178  * Free a function and remove it from the list of functions.
18179  */
18180     static void
18181 func_free(fp)
18182     ufunc_T *fp;
18183 {
18184     hashitem_T	*hi;
18185 
18186     /* clear this function */
18187     ga_clear_strings(&(fp->uf_args));
18188     ga_clear_strings(&(fp->uf_lines));
18189 #ifdef FEAT_PROFILE
18190     vim_free(fp->uf_tml_count);
18191     vim_free(fp->uf_tml_total);
18192     vim_free(fp->uf_tml_self);
18193 #endif
18194 
18195     /* remove the function from the function hashtable */
18196     hi = hash_find(&func_hashtab, UF2HIKEY(fp));
18197     if (HASHITEM_EMPTY(hi))
18198 	EMSG2(_(e_intern2), "func_free()");
18199     else
18200 	hash_remove(&func_hashtab, hi);
18201 
18202     vim_free(fp);
18203 }
18204 
18205 /*
18206  * Unreference a Function: decrement the reference count and free it when it
18207  * becomes zero.  Only for numbered functions.
18208  */
18209     static void
18210 func_unref(name)
18211     char_u	*name;
18212 {
18213     ufunc_T *fp;
18214 
18215     if (name != NULL && isdigit(*name))
18216     {
18217 	fp = find_func(name);
18218 	if (fp == NULL)
18219 	    EMSG2(_(e_intern2), "func_unref()");
18220 	else if (--fp->uf_refcount <= 0)
18221 	{
18222 	    /* Only delete it when it's not being used.  Otherwise it's done
18223 	     * when "uf_calls" becomes zero. */
18224 	    if (fp->uf_calls == 0)
18225 		func_free(fp);
18226 	}
18227     }
18228 }
18229 
18230 /*
18231  * Count a reference to a Function.
18232  */
18233     static void
18234 func_ref(name)
18235     char_u	*name;
18236 {
18237     ufunc_T *fp;
18238 
18239     if (name != NULL && isdigit(*name))
18240     {
18241 	fp = find_func(name);
18242 	if (fp == NULL)
18243 	    EMSG2(_(e_intern2), "func_ref()");
18244 	else
18245 	    ++fp->uf_refcount;
18246     }
18247 }
18248 
18249 /*
18250  * Call a user function.
18251  */
18252     static void
18253 call_user_func(fp, argcount, argvars, rettv, firstline, lastline, selfdict)
18254     ufunc_T	*fp;		/* pointer to function */
18255     int		argcount;	/* nr of args */
18256     typval_T	*argvars;	/* arguments */
18257     typval_T	*rettv;		/* return value */
18258     linenr_T	firstline;	/* first line of range */
18259     linenr_T	lastline;	/* last line of range */
18260     dict_T	*selfdict;	/* Dictionary for "self" */
18261 {
18262     char_u	*save_sourcing_name;
18263     linenr_T	save_sourcing_lnum;
18264     scid_T	save_current_SID;
18265     funccall_T	fc;
18266     int		save_did_emsg;
18267     static int	depth = 0;
18268     dictitem_T	*v;
18269     int		fixvar_idx = 0;	/* index in fixvar[] */
18270     int		i;
18271     int		ai;
18272     char_u	numbuf[NUMBUFLEN];
18273     char_u	*name;
18274 #ifdef FEAT_PROFILE
18275     proftime_T	wait_start;
18276 #endif
18277 
18278     /* If depth of calling is getting too high, don't execute the function */
18279     if (depth >= p_mfd)
18280     {
18281 	EMSG(_("E132: Function call depth is higher than 'maxfuncdepth'"));
18282 	rettv->v_type = VAR_NUMBER;
18283 	rettv->vval.v_number = -1;
18284 	return;
18285     }
18286     ++depth;
18287 
18288     line_breakcheck();		/* check for CTRL-C hit */
18289 
18290     fc.caller = current_funccal;
18291     current_funccal = &fc;
18292     fc.func = fp;
18293     fc.rettv = rettv;
18294     rettv->vval.v_number = 0;
18295     fc.linenr = 0;
18296     fc.returned = FALSE;
18297     fc.level = ex_nesting_level;
18298     /* Check if this function has a breakpoint. */
18299     fc.breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name, (linenr_T)0);
18300     fc.dbg_tick = debug_tick;
18301 
18302     /*
18303      * Note about using fc.fixvar[]: This is an array of FIXVAR_CNT variables
18304      * with names up to VAR_SHORT_LEN long.  This avoids having to alloc/free
18305      * each argument variable and saves a lot of time.
18306      */
18307     /*
18308      * Init l: variables.
18309      */
18310     init_var_dict(&fc.l_vars, &fc.l_vars_var);
18311     if (selfdict != NULL)
18312     {
18313 	/* Set l:self to "selfdict". */
18314 	v = &fc.fixvar[fixvar_idx++].var;
18315 	STRCPY(v->di_key, "self");
18316 	v->di_flags = DI_FLAGS_RO + DI_FLAGS_FIX;
18317 	hash_add(&fc.l_vars.dv_hashtab, DI2HIKEY(v));
18318 	v->di_tv.v_type = VAR_DICT;
18319 	v->di_tv.v_lock = 0;
18320 	v->di_tv.vval.v_dict = selfdict;
18321 	++selfdict->dv_refcount;
18322     }
18323 
18324     /*
18325      * Init a: variables.
18326      * Set a:0 to "argcount".
18327      * Set a:000 to a list with room for the "..." arguments.
18328      */
18329     init_var_dict(&fc.l_avars, &fc.l_avars_var);
18330     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "0",
18331 				(varnumber_T)(argcount - fp->uf_args.ga_len));
18332     v = &fc.fixvar[fixvar_idx++].var;
18333     STRCPY(v->di_key, "000");
18334     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18335     hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18336     v->di_tv.v_type = VAR_LIST;
18337     v->di_tv.v_lock = VAR_FIXED;
18338     v->di_tv.vval.v_list = &fc.l_varlist;
18339     vim_memset(&fc.l_varlist, 0, sizeof(list_T));
18340     fc.l_varlist.lv_refcount = 99999;
18341 
18342     /*
18343      * Set a:firstline to "firstline" and a:lastline to "lastline".
18344      * Set a:name to named arguments.
18345      * Set a:N to the "..." arguments.
18346      */
18347     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "firstline",
18348 						      (varnumber_T)firstline);
18349     add_nr_var(&fc.l_avars, &fc.fixvar[fixvar_idx++].var, "lastline",
18350 						       (varnumber_T)lastline);
18351     for (i = 0; i < argcount; ++i)
18352     {
18353 	ai = i - fp->uf_args.ga_len;
18354 	if (ai < 0)
18355 	    /* named argument a:name */
18356 	    name = FUNCARG(fp, i);
18357 	else
18358 	{
18359 	    /* "..." argument a:1, a:2, etc. */
18360 	    sprintf((char *)numbuf, "%d", ai + 1);
18361 	    name = numbuf;
18362 	}
18363 	if (fixvar_idx < FIXVAR_CNT && STRLEN(name) <= VAR_SHORT_LEN)
18364 	{
18365 	    v = &fc.fixvar[fixvar_idx++].var;
18366 	    v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18367 	}
18368 	else
18369 	{
18370 	    v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
18371 							     + STRLEN(name)));
18372 	    if (v == NULL)
18373 		break;
18374 	    v->di_flags = DI_FLAGS_RO;
18375 	}
18376 	STRCPY(v->di_key, name);
18377 	hash_add(&fc.l_avars.dv_hashtab, DI2HIKEY(v));
18378 
18379 	/* Note: the values are copied directly to avoid alloc/free.
18380 	 * "argvars" must have VAR_FIXED for v_lock. */
18381 	v->di_tv = argvars[i];
18382 	v->di_tv.v_lock = VAR_FIXED;
18383 
18384 	if (ai >= 0 && ai < MAX_FUNC_ARGS)
18385 	{
18386 	    list_append(&fc.l_varlist, &fc.l_listitems[ai]);
18387 	    fc.l_listitems[ai].li_tv = argvars[i];
18388 	    fc.l_listitems[ai].li_tv.v_lock = VAR_FIXED;
18389 	}
18390     }
18391 
18392     /* Don't redraw while executing the function. */
18393     ++RedrawingDisabled;
18394     save_sourcing_name = sourcing_name;
18395     save_sourcing_lnum = sourcing_lnum;
18396     sourcing_lnum = 1;
18397     sourcing_name = alloc((unsigned)((save_sourcing_name == NULL ? 0
18398 		: STRLEN(save_sourcing_name)) + STRLEN(fp->uf_name) + 13));
18399     if (sourcing_name != NULL)
18400     {
18401 	if (save_sourcing_name != NULL
18402 			  && STRNCMP(save_sourcing_name, "function ", 9) == 0)
18403 	    sprintf((char *)sourcing_name, "%s..", save_sourcing_name);
18404 	else
18405 	    STRCPY(sourcing_name, "function ");
18406 	cat_func_name(sourcing_name + STRLEN(sourcing_name), fp);
18407 
18408 	if (p_verbose >= 12)
18409 	{
18410 	    ++no_wait_return;
18411 	    verbose_enter_scroll();
18412 
18413 	    smsg((char_u *)_("calling %s"), sourcing_name);
18414 	    if (p_verbose >= 14)
18415 	    {
18416 		char_u	buf[MSG_BUF_LEN];
18417 		char_u	numbuf[NUMBUFLEN];
18418 		char_u	*tofree;
18419 
18420 		msg_puts((char_u *)"(");
18421 		for (i = 0; i < argcount; ++i)
18422 		{
18423 		    if (i > 0)
18424 			msg_puts((char_u *)", ");
18425 		    if (argvars[i].v_type == VAR_NUMBER)
18426 			msg_outnum((long)argvars[i].vval.v_number);
18427 		    else
18428 		    {
18429 			trunc_string(tv2string(&argvars[i], &tofree, numbuf),
18430 							    buf, MSG_BUF_CLEN);
18431 			msg_puts(buf);
18432 			vim_free(tofree);
18433 		    }
18434 		}
18435 		msg_puts((char_u *)")");
18436 	    }
18437 	    msg_puts((char_u *)"\n");   /* don't overwrite this either */
18438 
18439 	    verbose_leave_scroll();
18440 	    --no_wait_return;
18441 	}
18442     }
18443 #ifdef FEAT_PROFILE
18444     if (do_profiling)
18445     {
18446 	if (!fp->uf_profiling && has_profiling(FALSE, fp->uf_name, NULL))
18447 	    func_do_profile(fp);
18448 	if (fp->uf_profiling
18449 		       || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18450 	{
18451 	    ++fp->uf_tm_count;
18452 	    profile_start(&fp->uf_tm_start);
18453 	    profile_zero(&fp->uf_tm_children);
18454 	}
18455 	script_prof_save(&wait_start);
18456     }
18457 #endif
18458 
18459     save_current_SID = current_SID;
18460     current_SID = fp->uf_script_ID;
18461     save_did_emsg = did_emsg;
18462     did_emsg = FALSE;
18463 
18464     /* call do_cmdline() to execute the lines */
18465     do_cmdline(NULL, get_func_line, (void *)&fc,
18466 				     DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
18467 
18468     --RedrawingDisabled;
18469 
18470     /* when the function was aborted because of an error, return -1 */
18471     if ((did_emsg && (fp->uf_flags & FC_ABORT)) || rettv->v_type == VAR_UNKNOWN)
18472     {
18473 	clear_tv(rettv);
18474 	rettv->v_type = VAR_NUMBER;
18475 	rettv->vval.v_number = -1;
18476     }
18477 
18478 #ifdef FEAT_PROFILE
18479     if (fp->uf_profiling || (fc.caller != NULL && &fc.caller->func->uf_profiling))
18480     {
18481 	profile_end(&fp->uf_tm_start);
18482 	profile_sub_wait(&wait_start, &fp->uf_tm_start);
18483 	profile_add(&fp->uf_tm_total, &fp->uf_tm_start);
18484 	profile_add(&fp->uf_tm_self, &fp->uf_tm_start);
18485 	profile_sub(&fp->uf_tm_self, &fp->uf_tm_children);
18486 	if (fc.caller != NULL && &fc.caller->func->uf_profiling)
18487 	{
18488 	    profile_add(&fc.caller->func->uf_tm_children, &fp->uf_tm_start);
18489 	    profile_add(&fc.caller->func->uf_tml_children, &fp->uf_tm_start);
18490 	}
18491     }
18492 #endif
18493 
18494     /* when being verbose, mention the return value */
18495     if (p_verbose >= 12)
18496     {
18497 	++no_wait_return;
18498 	verbose_enter_scroll();
18499 
18500 	if (aborting())
18501 	    smsg((char_u *)_("%s aborted"), sourcing_name);
18502 	else if (fc.rettv->v_type == VAR_NUMBER)
18503 	    smsg((char_u *)_("%s returning #%ld"), sourcing_name,
18504 					       (long)fc.rettv->vval.v_number);
18505 	else
18506 	{
18507 	    char_u	buf[MSG_BUF_LEN];
18508 	    char_u	numbuf[NUMBUFLEN];
18509 	    char_u	*tofree;
18510 
18511 	    /* The value may be very long.  Skip the middle part, so that we
18512 	     * have some idea how it starts and ends. smsg() would always
18513 	     * truncate it at the end. */
18514 	    trunc_string(tv2string(fc.rettv, &tofree, numbuf),
18515 							   buf, MSG_BUF_CLEN);
18516 	    smsg((char_u *)_("%s returning %s"), sourcing_name, buf);
18517 	    vim_free(tofree);
18518 	}
18519 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18520 
18521 	verbose_leave_scroll();
18522 	--no_wait_return;
18523     }
18524 
18525     vim_free(sourcing_name);
18526     sourcing_name = save_sourcing_name;
18527     sourcing_lnum = save_sourcing_lnum;
18528     current_SID = save_current_SID;
18529 #ifdef FEAT_PROFILE
18530     if (do_profiling)
18531 	script_prof_restore(&wait_start);
18532 #endif
18533 
18534     if (p_verbose >= 12 && sourcing_name != NULL)
18535     {
18536 	++no_wait_return;
18537 	verbose_enter_scroll();
18538 
18539 	smsg((char_u *)_("continuing in %s"), sourcing_name);
18540 	msg_puts((char_u *)"\n");   /* don't overwrite this either */
18541 
18542 	verbose_leave_scroll();
18543 	--no_wait_return;
18544     }
18545 
18546     did_emsg |= save_did_emsg;
18547     current_funccal = fc.caller;
18548 
18549     /* The a: variables typevals were not alloced, only free the allocated
18550      * variables. */
18551     vars_clear_ext(&fc.l_avars.dv_hashtab, FALSE);
18552 
18553     vars_clear(&fc.l_vars.dv_hashtab);		/* free all l: variables */
18554     --depth;
18555 }
18556 
18557 /*
18558  * Add a number variable "name" to dict "dp" with value "nr".
18559  */
18560     static void
18561 add_nr_var(dp, v, name, nr)
18562     dict_T	*dp;
18563     dictitem_T	*v;
18564     char	*name;
18565     varnumber_T nr;
18566 {
18567     STRCPY(v->di_key, name);
18568     v->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
18569     hash_add(&dp->dv_hashtab, DI2HIKEY(v));
18570     v->di_tv.v_type = VAR_NUMBER;
18571     v->di_tv.v_lock = VAR_FIXED;
18572     v->di_tv.vval.v_number = nr;
18573 }
18574 
18575 /*
18576  * ":return [expr]"
18577  */
18578     void
18579 ex_return(eap)
18580     exarg_T	*eap;
18581 {
18582     char_u	*arg = eap->arg;
18583     typval_T	rettv;
18584     int		returning = FALSE;
18585 
18586     if (current_funccal == NULL)
18587     {
18588 	EMSG(_("E133: :return not inside a function"));
18589 	return;
18590     }
18591 
18592     if (eap->skip)
18593 	++emsg_skip;
18594 
18595     eap->nextcmd = NULL;
18596     if ((*arg != NUL && *arg != '|' && *arg != '\n')
18597 	    && eval0(arg, &rettv, &eap->nextcmd, !eap->skip) != FAIL)
18598     {
18599 	if (!eap->skip)
18600 	    returning = do_return(eap, FALSE, TRUE, &rettv);
18601 	else
18602 	    clear_tv(&rettv);
18603     }
18604     /* It's safer to return also on error. */
18605     else if (!eap->skip)
18606     {
18607 	/*
18608 	 * Return unless the expression evaluation has been cancelled due to an
18609 	 * aborting error, an interrupt, or an exception.
18610 	 */
18611 	if (!aborting())
18612 	    returning = do_return(eap, FALSE, TRUE, NULL);
18613     }
18614 
18615     /* When skipping or the return gets pending, advance to the next command
18616      * in this line (!returning).  Otherwise, ignore the rest of the line.
18617      * Following lines will be ignored by get_func_line(). */
18618     if (returning)
18619 	eap->nextcmd = NULL;
18620     else if (eap->nextcmd == NULL)	    /* no argument */
18621 	eap->nextcmd = check_nextcmd(arg);
18622 
18623     if (eap->skip)
18624 	--emsg_skip;
18625 }
18626 
18627 /*
18628  * Return from a function.  Possibly makes the return pending.  Also called
18629  * for a pending return at the ":endtry" or after returning from an extra
18630  * do_cmdline().  "reanimate" is used in the latter case.  "is_cmd" is set
18631  * when called due to a ":return" command.  "rettv" may point to a typval_T
18632  * with the return rettv.  Returns TRUE when the return can be carried out,
18633  * FALSE when the return gets pending.
18634  */
18635     int
18636 do_return(eap, reanimate, is_cmd, rettv)
18637     exarg_T	*eap;
18638     int		reanimate;
18639     int		is_cmd;
18640     void	*rettv;
18641 {
18642     int		idx;
18643     struct condstack *cstack = eap->cstack;
18644 
18645     if (reanimate)
18646 	/* Undo the return. */
18647 	current_funccal->returned = FALSE;
18648 
18649     /*
18650      * Cleanup (and inactivate) conditionals, but stop when a try conditional
18651      * not in its finally clause (which then is to be executed next) is found.
18652      * In this case, make the ":return" pending for execution at the ":endtry".
18653      * Otherwise, return normally.
18654      */
18655     idx = cleanup_conditionals(eap->cstack, 0, TRUE);
18656     if (idx >= 0)
18657     {
18658 	cstack->cs_pending[idx] = CSTP_RETURN;
18659 
18660 	if (!is_cmd && !reanimate)
18661 	    /* A pending return again gets pending.  "rettv" points to an
18662 	     * allocated variable with the rettv of the original ":return"'s
18663 	     * argument if present or is NULL else. */
18664 	    cstack->cs_rettv[idx] = rettv;
18665 	else
18666 	{
18667 	    /* When undoing a return in order to make it pending, get the stored
18668 	     * return rettv. */
18669 	    if (reanimate)
18670 		rettv = current_funccal->rettv;
18671 
18672 	    if (rettv != NULL)
18673 	    {
18674 		/* Store the value of the pending return. */
18675 		if ((cstack->cs_rettv[idx] = alloc_tv()) != NULL)
18676 		    *(typval_T *)cstack->cs_rettv[idx] = *(typval_T *)rettv;
18677 		else
18678 		    EMSG(_(e_outofmem));
18679 	    }
18680 	    else
18681 		cstack->cs_rettv[idx] = NULL;
18682 
18683 	    if (reanimate)
18684 	    {
18685 		/* The pending return value could be overwritten by a ":return"
18686 		 * without argument in a finally clause; reset the default
18687 		 * return value. */
18688 		current_funccal->rettv->v_type = VAR_NUMBER;
18689 		current_funccal->rettv->vval.v_number = 0;
18690 	    }
18691 	}
18692 	report_make_pending(CSTP_RETURN, rettv);
18693     }
18694     else
18695     {
18696 	current_funccal->returned = TRUE;
18697 
18698 	/* If the return is carried out now, store the return value.  For
18699 	 * a return immediately after reanimation, the value is already
18700 	 * there. */
18701 	if (!reanimate && rettv != NULL)
18702 	{
18703 	    clear_tv(current_funccal->rettv);
18704 	    *current_funccal->rettv = *(typval_T *)rettv;
18705 	    if (!is_cmd)
18706 		vim_free(rettv);
18707 	}
18708     }
18709 
18710     return idx < 0;
18711 }
18712 
18713 /*
18714  * Free the variable with a pending return value.
18715  */
18716     void
18717 discard_pending_return(rettv)
18718     void	*rettv;
18719 {
18720     free_tv((typval_T *)rettv);
18721 }
18722 
18723 /*
18724  * Generate a return command for producing the value of "rettv".  The result
18725  * is an allocated string.  Used by report_pending() for verbose messages.
18726  */
18727     char_u *
18728 get_return_cmd(rettv)
18729     void	*rettv;
18730 {
18731     char_u	*s = NULL;
18732     char_u	*tofree = NULL;
18733     char_u	numbuf[NUMBUFLEN];
18734 
18735     if (rettv != NULL)
18736 	s = echo_string((typval_T *)rettv, &tofree, numbuf);
18737     if (s == NULL)
18738 	s = (char_u *)"";
18739 
18740     STRCPY(IObuff, ":return ");
18741     STRNCPY(IObuff + 8, s, IOSIZE - 8);
18742     if (STRLEN(s) + 8 >= IOSIZE)
18743 	STRCPY(IObuff + IOSIZE - 4, "...");
18744     vim_free(tofree);
18745     return vim_strsave(IObuff);
18746 }
18747 
18748 /*
18749  * Get next function line.
18750  * Called by do_cmdline() to get the next line.
18751  * Returns allocated string, or NULL for end of function.
18752  */
18753 /* ARGSUSED */
18754     char_u *
18755 get_func_line(c, cookie, indent)
18756     int	    c;		    /* not used */
18757     void    *cookie;
18758     int	    indent;	    /* not used */
18759 {
18760     funccall_T	*fcp = (funccall_T *)cookie;
18761     ufunc_T	*fp = fcp->func;
18762     char_u	*retval;
18763     garray_T	*gap;  /* growarray with function lines */
18764 
18765     /* If breakpoints have been added/deleted need to check for it. */
18766     if (fcp->dbg_tick != debug_tick)
18767     {
18768 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18769 							       sourcing_lnum);
18770 	fcp->dbg_tick = debug_tick;
18771     }
18772 #ifdef FEAT_PROFILE
18773     if (do_profiling)
18774 	func_line_end(cookie);
18775 #endif
18776 
18777     gap = &fp->uf_lines;
18778     if ((fp->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18779 	retval = NULL;
18780     else if (fcp->returned || fcp->linenr >= gap->ga_len)
18781 	retval = NULL;
18782     else
18783     {
18784 	retval = vim_strsave(((char_u **)(gap->ga_data))[fcp->linenr++]);
18785 	sourcing_lnum = fcp->linenr;
18786 #ifdef FEAT_PROFILE
18787 	if (do_profiling)
18788 	    func_line_start(cookie);
18789 #endif
18790     }
18791 
18792     /* Did we encounter a breakpoint? */
18793     if (fcp->breakpoint != 0 && fcp->breakpoint <= sourcing_lnum)
18794     {
18795 	dbg_breakpoint(fp->uf_name, sourcing_lnum);
18796 	/* Find next breakpoint. */
18797 	fcp->breakpoint = dbg_find_breakpoint(FALSE, fp->uf_name,
18798 							       sourcing_lnum);
18799 	fcp->dbg_tick = debug_tick;
18800     }
18801 
18802     return retval;
18803 }
18804 
18805 #if defined(FEAT_PROFILE) || defined(PROTO)
18806 /*
18807  * Called when starting to read a function line.
18808  * "sourcing_lnum" must be correct!
18809  * When skipping lines it may not actually be executed, but we won't find out
18810  * until later and we need to store the time now.
18811  */
18812     void
18813 func_line_start(cookie)
18814     void    *cookie;
18815 {
18816     funccall_T	*fcp = (funccall_T *)cookie;
18817     ufunc_T	*fp = fcp->func;
18818 
18819     if (fp->uf_profiling && sourcing_lnum >= 1
18820 				      && sourcing_lnum <= fp->uf_lines.ga_len)
18821     {
18822 	fp->uf_tml_idx = sourcing_lnum - 1;
18823 	fp->uf_tml_execed = FALSE;
18824 	profile_start(&fp->uf_tml_start);
18825 	profile_zero(&fp->uf_tml_children);
18826 	profile_get_wait(&fp->uf_tml_wait);
18827     }
18828 }
18829 
18830 /*
18831  * Called when actually executing a function line.
18832  */
18833     void
18834 func_line_exec(cookie)
18835     void    *cookie;
18836 {
18837     funccall_T	*fcp = (funccall_T *)cookie;
18838     ufunc_T	*fp = fcp->func;
18839 
18840     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18841 	fp->uf_tml_execed = TRUE;
18842 }
18843 
18844 /*
18845  * Called when done with a function line.
18846  */
18847     void
18848 func_line_end(cookie)
18849     void    *cookie;
18850 {
18851     funccall_T	*fcp = (funccall_T *)cookie;
18852     ufunc_T	*fp = fcp->func;
18853 
18854     if (fp->uf_profiling && fp->uf_tml_idx >= 0)
18855     {
18856 	if (fp->uf_tml_execed)
18857 	{
18858 	    ++fp->uf_tml_count[fp->uf_tml_idx];
18859 	    profile_end(&fp->uf_tml_start);
18860 	    profile_sub_wait(&fp->uf_tml_wait, &fp->uf_tml_start);
18861 	    profile_add(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_start);
18862 	    profile_add(&fp->uf_tml_total[fp->uf_tml_idx], &fp->uf_tml_start);
18863 	    profile_sub(&fp->uf_tml_self[fp->uf_tml_idx], &fp->uf_tml_children);
18864 	}
18865 	fp->uf_tml_idx = -1;
18866     }
18867 }
18868 #endif
18869 
18870 /*
18871  * Return TRUE if the currently active function should be ended, because a
18872  * return was encountered or an error occured.  Used inside a ":while".
18873  */
18874     int
18875 func_has_ended(cookie)
18876     void    *cookie;
18877 {
18878     funccall_T  *fcp = (funccall_T *)cookie;
18879 
18880     /* Ignore the "abort" flag if the abortion behavior has been changed due to
18881      * an error inside a try conditional. */
18882     return (((fcp->func->uf_flags & FC_ABORT) && did_emsg && !aborted_in_try())
18883 	    || fcp->returned);
18884 }
18885 
18886 /*
18887  * return TRUE if cookie indicates a function which "abort"s on errors.
18888  */
18889     int
18890 func_has_abort(cookie)
18891     void    *cookie;
18892 {
18893     return ((funccall_T *)cookie)->func->uf_flags & FC_ABORT;
18894 }
18895 
18896 #if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
18897 typedef enum
18898 {
18899     VAR_FLAVOUR_DEFAULT,
18900     VAR_FLAVOUR_SESSION,
18901     VAR_FLAVOUR_VIMINFO
18902 } var_flavour_T;
18903 
18904 static var_flavour_T var_flavour __ARGS((char_u *varname));
18905 
18906     static var_flavour_T
18907 var_flavour(varname)
18908     char_u *varname;
18909 {
18910     char_u *p = varname;
18911 
18912     if (ASCII_ISUPPER(*p))
18913     {
18914 	while (*(++p))
18915 	    if (ASCII_ISLOWER(*p))
18916 		return VAR_FLAVOUR_SESSION;
18917 	return VAR_FLAVOUR_VIMINFO;
18918     }
18919     else
18920 	return VAR_FLAVOUR_DEFAULT;
18921 }
18922 #endif
18923 
18924 #if defined(FEAT_VIMINFO) || defined(PROTO)
18925 /*
18926  * Restore global vars that start with a capital from the viminfo file
18927  */
18928     int
18929 read_viminfo_varlist(virp, writing)
18930     vir_T	*virp;
18931     int		writing;
18932 {
18933     char_u	*tab;
18934     int		is_string = FALSE;
18935     typval_T	tv;
18936 
18937     if (!writing && (find_viminfo_parameter('!') != NULL))
18938     {
18939 	tab = vim_strchr(virp->vir_line + 1, '\t');
18940 	if (tab != NULL)
18941 	{
18942 	    *tab++ = '\0';	/* isolate the variable name */
18943 	    if (*tab == 'S')	/* string var */
18944 		is_string = TRUE;
18945 
18946 	    tab = vim_strchr(tab, '\t');
18947 	    if (tab != NULL)
18948 	    {
18949 		if (is_string)
18950 		{
18951 		    tv.v_type = VAR_STRING;
18952 		    tv.vval.v_string = viminfo_readstring(virp,
18953 				       (int)(tab - virp->vir_line + 1), TRUE);
18954 		}
18955 		else
18956 		{
18957 		    tv.v_type = VAR_NUMBER;
18958 		    tv.vval.v_number = atol((char *)tab + 1);
18959 		}
18960 		set_var(virp->vir_line + 1, &tv, FALSE);
18961 		if (is_string)
18962 		    vim_free(tv.vval.v_string);
18963 	    }
18964 	}
18965     }
18966 
18967     return viminfo_readline(virp);
18968 }
18969 
18970 /*
18971  * Write global vars that start with a capital to the viminfo file
18972  */
18973     void
18974 write_viminfo_varlist(fp)
18975     FILE    *fp;
18976 {
18977     hashitem_T	*hi;
18978     dictitem_T	*this_var;
18979     int		todo;
18980     char	*s;
18981     char_u	*p;
18982     char_u	*tofree;
18983     char_u	numbuf[NUMBUFLEN];
18984 
18985     if (find_viminfo_parameter('!') == NULL)
18986 	return;
18987 
18988     fprintf(fp, _("\n# global variables:\n"));
18989 
18990     todo = globvarht.ht_used;
18991     for (hi = globvarht.ht_array; todo > 0; ++hi)
18992     {
18993 	if (!HASHITEM_EMPTY(hi))
18994 	{
18995 	    --todo;
18996 	    this_var = HI2DI(hi);
18997 	    if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
18998 	    {
18999 		switch (this_var->di_tv.v_type)
19000 		{
19001 		    case VAR_STRING: s = "STR"; break;
19002 		    case VAR_NUMBER: s = "NUM"; break;
19003 		    default: continue;
19004 		}
19005 		fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
19006 		p = echo_string(&this_var->di_tv, &tofree, numbuf);
19007 		if (p != NULL)
19008 		    viminfo_writestring(fp, p);
19009 		vim_free(tofree);
19010 	    }
19011 	}
19012     }
19013 }
19014 #endif
19015 
19016 #if defined(FEAT_SESSION) || defined(PROTO)
19017     int
19018 store_session_globals(fd)
19019     FILE	*fd;
19020 {
19021     hashitem_T	*hi;
19022     dictitem_T	*this_var;
19023     int		todo;
19024     char_u	*p, *t;
19025 
19026     todo = globvarht.ht_used;
19027     for (hi = globvarht.ht_array; todo > 0; ++hi)
19028     {
19029 	if (!HASHITEM_EMPTY(hi))
19030 	{
19031 	    --todo;
19032 	    this_var = HI2DI(hi);
19033 	    if ((this_var->di_tv.v_type == VAR_NUMBER
19034 			|| this_var->di_tv.v_type == VAR_STRING)
19035 		    && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
19036 	    {
19037 		/* Escape special characters with a backslash.  Turn a LF and
19038 		 * CR into \n and \r. */
19039 		p = vim_strsave_escaped(get_tv_string(&this_var->di_tv),
19040 							(char_u *)"\\\"\n\r");
19041 		if (p == NULL)	    /* out of memory */
19042 		    break;
19043 		for (t = p; *t != NUL; ++t)
19044 		    if (*t == '\n')
19045 			*t = 'n';
19046 		    else if (*t == '\r')
19047 			*t = 'r';
19048 		if ((fprintf(fd, "let %s = %c%s%c",
19049 				this_var->di_key,
19050 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
19051 									: ' ',
19052 				p,
19053 				(this_var->di_tv.v_type == VAR_STRING) ? '"'
19054 								   : ' ') < 0)
19055 			|| put_eol(fd) == FAIL)
19056 		{
19057 		    vim_free(p);
19058 		    return FAIL;
19059 		}
19060 		vim_free(p);
19061 	    }
19062 	}
19063     }
19064     return OK;
19065 }
19066 #endif
19067 
19068 /*
19069  * Display script name where an item was last set.
19070  * Should only be invoked when 'verbose' is non-zero.
19071  */
19072     void
19073 last_set_msg(scriptID)
19074     scid_T scriptID;
19075 {
19076     char_u *p;
19077 
19078     if (scriptID != 0)
19079     {
19080 	p = home_replace_save(NULL, get_scriptname(scriptID));
19081 	if (p != NULL)
19082 	{
19083 	    verbose_enter();
19084 	    MSG_PUTS(_("\n\tLast set from "));
19085 	    MSG_PUTS(p);
19086 	    vim_free(p);
19087 	    verbose_leave();
19088 	}
19089     }
19090 }
19091 
19092 #endif /* FEAT_EVAL */
19093 
19094 #if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
19095 
19096 
19097 #ifdef WIN3264
19098 /*
19099  * Functions for ":8" filename modifier: get 8.3 version of a filename.
19100  */
19101 static int get_short_pathname __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
19102 static int shortpath_for_invalid_fname __ARGS((char_u **fname, char_u **bufp, int *fnamelen));
19103 static int shortpath_for_partial __ARGS((char_u **fnamep, char_u **bufp, int *fnamelen));
19104 
19105 /*
19106  * Get the short pathname of a file.
19107  * Returns 1 on success. *fnamelen is 0 for nonexistant path.
19108  */
19109     static int
19110 get_short_pathname(fnamep, bufp, fnamelen)
19111     char_u	**fnamep;
19112     char_u	**bufp;
19113     int		*fnamelen;
19114 {
19115     int		l,len;
19116     char_u	*newbuf;
19117 
19118     len = *fnamelen;
19119 
19120     l = GetShortPathName(*fnamep, *fnamep, len);
19121     if (l > len - 1)
19122     {
19123 	/* If that doesn't work (not enough space), then save the string
19124 	 * and try again with a new buffer big enough
19125 	 */
19126 	newbuf = vim_strnsave(*fnamep, l);
19127 	if (newbuf == NULL)
19128 	    return 0;
19129 
19130 	vim_free(*bufp);
19131 	*fnamep = *bufp = newbuf;
19132 
19133 	l = GetShortPathName(*fnamep,*fnamep,l+1);
19134 
19135 	/* Really should always succeed, as the buffer is big enough */
19136     }
19137 
19138     *fnamelen = l;
19139     return 1;
19140 }
19141 
19142 /*
19143  * Create a short path name.  Returns the length of the buffer it needs.
19144  * Doesn't copy over the end of the buffer passed in.
19145  */
19146     static int
19147 shortpath_for_invalid_fname(fname, bufp, fnamelen)
19148     char_u	**fname;
19149     char_u	**bufp;
19150     int		*fnamelen;
19151 {
19152     char_u	*s, *p, *pbuf2, *pbuf3;
19153     char_u	ch;
19154     int		len, len2, plen, slen;
19155 
19156     /* Make a copy */
19157     len2 = *fnamelen;
19158     pbuf2 = vim_strnsave(*fname, len2);
19159     pbuf3 = NULL;
19160 
19161     s = pbuf2 + len2 - 1; /* Find the end */
19162     slen = 1;
19163     plen = len2;
19164 
19165     if (after_pathsep(pbuf2, s + 1))
19166     {
19167 	--s;
19168 	++slen;
19169 	--plen;
19170     }
19171 
19172     do
19173     {
19174 	/* Go back one path-seperator */
19175 	while (s > pbuf2 && !after_pathsep(pbuf2, s + 1))
19176 	{
19177 	    --s;
19178 	    ++slen;
19179 	    --plen;
19180 	}
19181 	if (s <= pbuf2)
19182 	    break;
19183 
19184 	/* Remeber the character that is about to be blatted */
19185 	ch = *s;
19186 	*s = 0; /* get_short_pathname requires a null-terminated string */
19187 
19188 	/* Try it in situ */
19189 	p = pbuf2;
19190 	if (!get_short_pathname(&p, &pbuf3, &plen))
19191 	{
19192 	    vim_free(pbuf2);
19193 	    return -1;
19194 	}
19195 	*s = ch;    /* Preserve the string */
19196     } while (plen == 0);
19197 
19198     if (plen > 0)
19199     {
19200 	/* Remeber the length of the new string.  */
19201 	*fnamelen = len = plen + slen;
19202 	vim_free(*bufp);
19203 	if (len > len2)
19204 	{
19205 	    /* If there's not enough space in the currently allocated string,
19206 	     * then copy it to a buffer big enough.
19207 	     */
19208 	    *fname= *bufp = vim_strnsave(p, len);
19209 	    if (*fname == NULL)
19210 		return -1;
19211 	}
19212 	else
19213 	{
19214 	    /* Transfer pbuf2 to being the main buffer  (it's big enough) */
19215 	    *fname = *bufp = pbuf2;
19216 	    if (p != pbuf2)
19217 		strncpy(*fname, p, plen);
19218 	    pbuf2 = NULL;
19219 	}
19220 	/* Concat the next bit */
19221 	strncpy(*fname + plen, s, slen);
19222 	(*fname)[len] = '\0';
19223     }
19224     vim_free(pbuf3);
19225     vim_free(pbuf2);
19226     return 0;
19227 }
19228 
19229 /*
19230  * Get a pathname for a partial path.
19231  */
19232     static int
19233 shortpath_for_partial(fnamep, bufp, fnamelen)
19234     char_u	**fnamep;
19235     char_u	**bufp;
19236     int		*fnamelen;
19237 {
19238     int		sepcount, len, tflen;
19239     char_u	*p;
19240     char_u	*pbuf, *tfname;
19241     int		hasTilde;
19242 
19243     /* Count up the path seperators from the RHS.. so we know which part
19244      * of the path to return.
19245      */
19246     sepcount = 0;
19247     for (p = *fnamep; p < *fnamep + *fnamelen; mb_ptr_adv(p))
19248 	if (vim_ispathsep(*p))
19249 	    ++sepcount;
19250 
19251     /* Need full path first (use expand_env() to remove a "~/") */
19252     hasTilde = (**fnamep == '~');
19253     if (hasTilde)
19254 	pbuf = tfname = expand_env_save(*fnamep);
19255     else
19256 	pbuf = tfname = FullName_save(*fnamep, FALSE);
19257 
19258     len = tflen = STRLEN(tfname);
19259 
19260     if (!get_short_pathname(&tfname, &pbuf, &len))
19261 	return -1;
19262 
19263     if (len == 0)
19264     {
19265 	/* Don't have a valid filename, so shorten the rest of the
19266 	 * path if we can. This CAN give us invalid 8.3 filenames, but
19267 	 * there's not a lot of point in guessing what it might be.
19268 	 */
19269 	len = tflen;
19270 	if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == -1)
19271 	    return -1;
19272     }
19273 
19274     /* Count the paths backward to find the beginning of the desired string. */
19275     for (p = tfname + len - 1; p >= tfname; --p)
19276     {
19277 #ifdef FEAT_MBYTE
19278 	if (has_mbyte)
19279 	    p -= mb_head_off(tfname, p);
19280 #endif
19281 	if (vim_ispathsep(*p))
19282 	{
19283 	    if (sepcount == 0 || (hasTilde && sepcount == 1))
19284 		break;
19285 	    else
19286 		sepcount --;
19287 	}
19288     }
19289     if (hasTilde)
19290     {
19291 	--p;
19292 	if (p >= tfname)
19293 	    *p = '~';
19294 	else
19295 	    return -1;
19296     }
19297     else
19298 	++p;
19299 
19300     /* Copy in the string - p indexes into tfname - allocated at pbuf */
19301     vim_free(*bufp);
19302     *fnamelen = (int)STRLEN(p);
19303     *bufp = pbuf;
19304     *fnamep = p;
19305 
19306     return 0;
19307 }
19308 #endif /* WIN3264 */
19309 
19310 /*
19311  * Adjust a filename, according to a string of modifiers.
19312  * *fnamep must be NUL terminated when called.  When returning, the length is
19313  * determined by *fnamelen.
19314  * Returns valid flags.
19315  * When there is an error, *fnamep is set to NULL.
19316  */
19317     int
19318 modify_fname(src, usedlen, fnamep, bufp, fnamelen)
19319     char_u	*src;		/* string with modifiers */
19320     int		*usedlen;	/* characters after src that are used */
19321     char_u	**fnamep;	/* file name so far */
19322     char_u	**bufp;		/* buffer for allocated file name or NULL */
19323     int		*fnamelen;	/* length of fnamep */
19324 {
19325     int		valid = 0;
19326     char_u	*tail;
19327     char_u	*s, *p, *pbuf;
19328     char_u	dirname[MAXPATHL];
19329     int		c;
19330     int		has_fullname = 0;
19331 #ifdef WIN3264
19332     int		has_shortname = 0;
19333 #endif
19334 
19335 repeat:
19336     /* ":p" - full path/file_name */
19337     if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
19338     {
19339 	has_fullname = 1;
19340 
19341 	valid |= VALID_PATH;
19342 	*usedlen += 2;
19343 
19344 	/* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
19345 	if ((*fnamep)[0] == '~'
19346 #if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
19347 		&& ((*fnamep)[1] == '/'
19348 # ifdef BACKSLASH_IN_FILENAME
19349 		    || (*fnamep)[1] == '\\'
19350 # endif
19351 		    || (*fnamep)[1] == NUL)
19352 
19353 #endif
19354 	   )
19355 	{
19356 	    *fnamep = expand_env_save(*fnamep);
19357 	    vim_free(*bufp);	/* free any allocated file name */
19358 	    *bufp = *fnamep;
19359 	    if (*fnamep == NULL)
19360 		return -1;
19361 	}
19362 
19363 	/* When "/." or "/.." is used: force expansion to get rid of it. */
19364 	for (p = *fnamep; *p != NUL; mb_ptr_adv(p))
19365 	{
19366 	    if (vim_ispathsep(*p)
19367 		    && p[1] == '.'
19368 		    && (p[2] == NUL
19369 			|| vim_ispathsep(p[2])
19370 			|| (p[2] == '.'
19371 			    && (p[3] == NUL || vim_ispathsep(p[3])))))
19372 		break;
19373 	}
19374 
19375 	/* FullName_save() is slow, don't use it when not needed. */
19376 	if (*p != NUL || !vim_isAbsName(*fnamep))
19377 	{
19378 	    *fnamep = FullName_save(*fnamep, *p != NUL);
19379 	    vim_free(*bufp);	/* free any allocated file name */
19380 	    *bufp = *fnamep;
19381 	    if (*fnamep == NULL)
19382 		return -1;
19383 	}
19384 
19385 	/* Append a path separator to a directory. */
19386 	if (mch_isdir(*fnamep))
19387 	{
19388 	    /* Make room for one or two extra characters. */
19389 	    *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
19390 	    vim_free(*bufp);	/* free any allocated file name */
19391 	    *bufp = *fnamep;
19392 	    if (*fnamep == NULL)
19393 		return -1;
19394 	    add_pathsep(*fnamep);
19395 	}
19396     }
19397 
19398     /* ":." - path relative to the current directory */
19399     /* ":~" - path relative to the home directory */
19400     /* ":8" - shortname path - postponed till after */
19401     while (src[*usedlen] == ':'
19402 		  && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
19403     {
19404 	*usedlen += 2;
19405 	if (c == '8')
19406 	{
19407 #ifdef WIN3264
19408 	    has_shortname = 1; /* Postpone this. */
19409 #endif
19410 	    continue;
19411 	}
19412 	pbuf = NULL;
19413 	/* Need full path first (use expand_env() to remove a "~/") */
19414 	if (!has_fullname)
19415 	{
19416 	    if (c == '.' && **fnamep == '~')
19417 		p = pbuf = expand_env_save(*fnamep);
19418 	    else
19419 		p = pbuf = FullName_save(*fnamep, FALSE);
19420 	}
19421 	else
19422 	    p = *fnamep;
19423 
19424 	has_fullname = 0;
19425 
19426 	if (p != NULL)
19427 	{
19428 	    if (c == '.')
19429 	    {
19430 		mch_dirname(dirname, MAXPATHL);
19431 		s = shorten_fname(p, dirname);
19432 		if (s != NULL)
19433 		{
19434 		    *fnamep = s;
19435 		    if (pbuf != NULL)
19436 		    {
19437 			vim_free(*bufp);   /* free any allocated file name */
19438 			*bufp = pbuf;
19439 			pbuf = NULL;
19440 		    }
19441 		}
19442 	    }
19443 	    else
19444 	    {
19445 		home_replace(NULL, p, dirname, MAXPATHL, TRUE);
19446 		/* Only replace it when it starts with '~' */
19447 		if (*dirname == '~')
19448 		{
19449 		    s = vim_strsave(dirname);
19450 		    if (s != NULL)
19451 		    {
19452 			*fnamep = s;
19453 			vim_free(*bufp);
19454 			*bufp = s;
19455 		    }
19456 		}
19457 	    }
19458 	    vim_free(pbuf);
19459 	}
19460     }
19461 
19462     tail = gettail(*fnamep);
19463     *fnamelen = (int)STRLEN(*fnamep);
19464 
19465     /* ":h" - head, remove "/file_name", can be repeated  */
19466     /* Don't remove the first "/" or "c:\" */
19467     while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
19468     {
19469 	valid |= VALID_HEAD;
19470 	*usedlen += 2;
19471 	s = get_past_head(*fnamep);
19472 	while (tail > s && after_pathsep(s, tail))
19473 	    --tail;
19474 	*fnamelen = (int)(tail - *fnamep);
19475 #ifdef VMS
19476 	if (*fnamelen > 0)
19477 	    *fnamelen += 1; /* the path separator is part of the path */
19478 #endif
19479 	while (tail > s && !after_pathsep(s, tail))
19480 	    mb_ptr_back(*fnamep, tail);
19481     }
19482 
19483     /* ":8" - shortname  */
19484     if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
19485     {
19486 	*usedlen += 2;
19487 #ifdef WIN3264
19488 	has_shortname = 1;
19489 #endif
19490     }
19491 
19492 #ifdef WIN3264
19493     /* Check shortname after we have done 'heads' and before we do 'tails'
19494      */
19495     if (has_shortname)
19496     {
19497 	pbuf = NULL;
19498 	/* Copy the string if it is shortened by :h */
19499 	if (*fnamelen < (int)STRLEN(*fnamep))
19500 	{
19501 	    p = vim_strnsave(*fnamep, *fnamelen);
19502 	    if (p == 0)
19503 		return -1;
19504 	    vim_free(*bufp);
19505 	    *bufp = *fnamep = p;
19506 	}
19507 
19508 	/* Split into two implementations - makes it easier.  First is where
19509 	 * there isn't a full name already, second is where there is.
19510 	 */
19511 	if (!has_fullname && !vim_isAbsName(*fnamep))
19512 	{
19513 	    if (shortpath_for_partial(fnamep, bufp, fnamelen) == -1)
19514 		return -1;
19515 	}
19516 	else
19517 	{
19518 	    int		l;
19519 
19520 	    /* Simple case, already have the full-name
19521 	     * Nearly always shorter, so try first time. */
19522 	    l = *fnamelen;
19523 	    if (!get_short_pathname(fnamep, bufp, &l))
19524 		return -1;
19525 
19526 	    if (l == 0)
19527 	    {
19528 		/* Couldn't find the filename.. search the paths.
19529 		 */
19530 		l = *fnamelen;
19531 		if (shortpath_for_invalid_fname(fnamep, bufp, &l ) == -1)
19532 		    return -1;
19533 	    }
19534 	    *fnamelen = l;
19535 	}
19536     }
19537 #endif /* WIN3264 */
19538 
19539     /* ":t" - tail, just the basename */
19540     if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
19541     {
19542 	*usedlen += 2;
19543 	*fnamelen -= (int)(tail - *fnamep);
19544 	*fnamep = tail;
19545     }
19546 
19547     /* ":e" - extension, can be repeated */
19548     /* ":r" - root, without extension, can be repeated */
19549     while (src[*usedlen] == ':'
19550 	    && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
19551     {
19552 	/* find a '.' in the tail:
19553 	 * - for second :e: before the current fname
19554 	 * - otherwise: The last '.'
19555 	 */
19556 	if (src[*usedlen + 1] == 'e' && *fnamep > tail)
19557 	    s = *fnamep - 2;
19558 	else
19559 	    s = *fnamep + *fnamelen - 1;
19560 	for ( ; s > tail; --s)
19561 	    if (s[0] == '.')
19562 		break;
19563 	if (src[*usedlen + 1] == 'e')		/* :e */
19564 	{
19565 	    if (s > tail)
19566 	    {
19567 		*fnamelen += (int)(*fnamep - (s + 1));
19568 		*fnamep = s + 1;
19569 #ifdef VMS
19570 		/* cut version from the extension */
19571 		s = *fnamep + *fnamelen - 1;
19572 		for ( ; s > *fnamep; --s)
19573 		    if (s[0] == ';')
19574 			break;
19575 		if (s > *fnamep)
19576 		    *fnamelen = s - *fnamep;
19577 #endif
19578 	    }
19579 	    else if (*fnamep <= tail)
19580 		*fnamelen = 0;
19581 	}
19582 	else				/* :r */
19583 	{
19584 	    if (s > tail)	/* remove one extension */
19585 		*fnamelen = (int)(s - *fnamep);
19586 	}
19587 	*usedlen += 2;
19588     }
19589 
19590     /* ":s?pat?foo?" - substitute */
19591     /* ":gs?pat?foo?" - global substitute */
19592     if (src[*usedlen] == ':'
19593 	    && (src[*usedlen + 1] == 's'
19594 		|| (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
19595     {
19596 	char_u	    *str;
19597 	char_u	    *pat;
19598 	char_u	    *sub;
19599 	int	    sep;
19600 	char_u	    *flags;
19601 	int	    didit = FALSE;
19602 
19603 	flags = (char_u *)"";
19604 	s = src + *usedlen + 2;
19605 	if (src[*usedlen + 1] == 'g')
19606 	{
19607 	    flags = (char_u *)"g";
19608 	    ++s;
19609 	}
19610 
19611 	sep = *s++;
19612 	if (sep)
19613 	{
19614 	    /* find end of pattern */
19615 	    p = vim_strchr(s, sep);
19616 	    if (p != NULL)
19617 	    {
19618 		pat = vim_strnsave(s, (int)(p - s));
19619 		if (pat != NULL)
19620 		{
19621 		    s = p + 1;
19622 		    /* find end of substitution */
19623 		    p = vim_strchr(s, sep);
19624 		    if (p != NULL)
19625 		    {
19626 			sub = vim_strnsave(s, (int)(p - s));
19627 			str = vim_strnsave(*fnamep, *fnamelen);
19628 			if (sub != NULL && str != NULL)
19629 			{
19630 			    *usedlen = (int)(p + 1 - src);
19631 			    s = do_string_sub(str, pat, sub, flags);
19632 			    if (s != NULL)
19633 			    {
19634 				*fnamep = s;
19635 				*fnamelen = (int)STRLEN(s);
19636 				vim_free(*bufp);
19637 				*bufp = s;
19638 				didit = TRUE;
19639 			    }
19640 			}
19641 			vim_free(sub);
19642 			vim_free(str);
19643 		    }
19644 		    vim_free(pat);
19645 		}
19646 	    }
19647 	    /* after using ":s", repeat all the modifiers */
19648 	    if (didit)
19649 		goto repeat;
19650 	}
19651     }
19652 
19653     return valid;
19654 }
19655 
19656 /*
19657  * Perform a substitution on "str" with pattern "pat" and substitute "sub".
19658  * "flags" can be "g" to do a global substitute.
19659  * Returns an allocated string, NULL for error.
19660  */
19661     char_u *
19662 do_string_sub(str, pat, sub, flags)
19663     char_u	*str;
19664     char_u	*pat;
19665     char_u	*sub;
19666     char_u	*flags;
19667 {
19668     int		sublen;
19669     regmatch_T	regmatch;
19670     int		i;
19671     int		do_all;
19672     char_u	*tail;
19673     garray_T	ga;
19674     char_u	*ret;
19675     char_u	*save_cpo;
19676 
19677     /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
19678     save_cpo = p_cpo;
19679     p_cpo = (char_u *)"";
19680 
19681     ga_init2(&ga, 1, 200);
19682 
19683     do_all = (flags[0] == 'g');
19684 
19685     regmatch.rm_ic = p_ic;
19686     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
19687     if (regmatch.regprog != NULL)
19688     {
19689 	tail = str;
19690 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
19691 	{
19692 	    /*
19693 	     * Get some space for a temporary buffer to do the substitution
19694 	     * into.  It will contain:
19695 	     * - The text up to where the match is.
19696 	     * - The substituted text.
19697 	     * - The text after the match.
19698 	     */
19699 	    sublen = vim_regsub(&regmatch, sub, tail, FALSE, TRUE, FALSE);
19700 	    if (ga_grow(&ga, (int)(STRLEN(tail) + sublen -
19701 			    (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
19702 	    {
19703 		ga_clear(&ga);
19704 		break;
19705 	    }
19706 
19707 	    /* copy the text up to where the match is */
19708 	    i = (int)(regmatch.startp[0] - tail);
19709 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
19710 	    /* add the substituted text */
19711 	    (void)vim_regsub(&regmatch, sub, (char_u *)ga.ga_data
19712 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
19713 	    ga.ga_len += i + sublen - 1;
19714 	    /* avoid getting stuck on a match with an empty string */
19715 	    if (tail == regmatch.endp[0])
19716 	    {
19717 		if (*tail == NUL)
19718 		    break;
19719 		*((char_u *)ga.ga_data + ga.ga_len) = *tail++;
19720 		++ga.ga_len;
19721 	    }
19722 	    else
19723 	    {
19724 		tail = regmatch.endp[0];
19725 		if (*tail == NUL)
19726 		    break;
19727 	    }
19728 	    if (!do_all)
19729 		break;
19730 	}
19731 
19732 	if (ga.ga_data != NULL)
19733 	    STRCPY((char *)ga.ga_data + ga.ga_len, tail);
19734 
19735 	vim_free(regmatch.regprog);
19736     }
19737 
19738     ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
19739     ga_clear(&ga);
19740     p_cpo = save_cpo;
19741 
19742     return ret;
19743 }
19744 
19745 #endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
19746