xref: /vim-8.2.3635/src/structs.h (revision e4f25e4a)
1 /* vi:set ts=8 sts=4 sw=4 noet:
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  */
8 
9 /*
10  * This file contains various definitions of structures that are used by Vim
11  */
12 
13 /*
14  * There is something wrong in the SAS compiler that makes typedefs not
15  * valid in include files.  Has been fixed in version 6.58.
16  */
17 #if defined(SASC) && SASC < 658
18 typedef long		linenr_T;
19 typedef int		colnr_T;
20 typedef unsigned short	short_u;
21 #endif
22 
23 /*
24  * position in file or buffer
25  */
26 typedef struct
27 {
28     linenr_T	lnum;	/* line number */
29     colnr_T	col;	/* column number */
30 #ifdef FEAT_VIRTUALEDIT
31     colnr_T	coladd;
32 #endif
33 } pos_T;
34 
35 #ifdef FEAT_VIRTUALEDIT
36 # define INIT_POS_T(l, c, ca) {l, c, ca}
37 #else
38 # define INIT_POS_T(l, c, ca) {l, c}
39 #endif
40 
41 /*
42  * Same, but without coladd.
43  */
44 typedef struct
45 {
46     linenr_T	lnum;	/* line number */
47     colnr_T	col;	/* column number */
48 } lpos_T;
49 
50 /*
51  * Structure used for growing arrays.
52  * This is used to store information that only grows, is deleted all at
53  * once, and needs to be accessed by index.  See ga_clear() and ga_grow().
54  */
55 typedef struct growarray
56 {
57     int	    ga_len;		    /* current number of items used */
58     int	    ga_maxlen;		    /* maximum number of items possible */
59     int	    ga_itemsize;	    /* sizeof(item) */
60     int	    ga_growsize;	    /* number of items to grow each time */
61     void    *ga_data;		    /* pointer to the first item */
62 } garray_T;
63 
64 #define GA_EMPTY    {0, 0, 0, 0, NULL}
65 
66 typedef struct window_S		win_T;
67 typedef struct wininfo_S	wininfo_T;
68 typedef struct frame_S		frame_T;
69 typedef int			scid_T;		/* script ID */
70 typedef struct file_buffer	buf_T;  /* forward declaration */
71 typedef struct terminal_S	term_T;
72 
73 /*
74  * Reference to a buffer that stores the value of buf_free_count.
75  * bufref_valid() only needs to check "buf" when the count differs.
76  */
77 typedef struct {
78     buf_T   *br_buf;
79     int	    br_fnum;
80     int	    br_buf_free_count;
81 } bufref_T;
82 
83 /*
84  * This is here because regexp.h needs pos_T and below regprog_T is used.
85  */
86 #include "regexp.h"
87 
88 /*
89  * This is here because gui.h needs the pos_T and win_T, and win_T needs gui.h
90  * for scrollbar_T.
91  */
92 #ifdef FEAT_GUI
93 # include "gui.h"
94 #else
95 # ifdef FEAT_XCLIPBOARD
96 #  include <X11/Intrinsic.h>
97 # endif
98 # define guicolor_T long
99 # define INVALCOLOR ((guicolor_T)0x1ffffff)
100 #endif
101 
102 /*
103  * marks: positions in a file
104  * (a normal mark is a lnum/col pair, the same as a file position)
105  */
106 
107 /* (Note: for EBCDIC there are more than 26, because there are gaps in the
108  * alphabet coding.  To minimize changes to the code, I decided to just
109  * increase the number of possible marks. */
110 #define NMARKS		('z' - 'a' + 1)	/* max. # of named marks */
111 #define JUMPLISTSIZE	100		/* max. # of marks in jump list */
112 #define TAGSTACKSIZE	20		/* max. # of tags in tag stack */
113 
114 typedef struct filemark
115 {
116     pos_T	mark;		/* cursor position */
117     int		fnum;		/* file number */
118 } fmark_T;
119 
120 /* Xtended file mark: also has a file name */
121 typedef struct xfilemark
122 {
123     fmark_T	fmark;
124     char_u	*fname;		/* file name, used when fnum == 0 */
125 #ifdef FEAT_VIMINFO
126     time_T	time_set;
127 #endif
128 } xfmark_T;
129 
130 /*
131  * The taggy struct is used to store the information about a :tag command.
132  */
133 typedef struct taggy
134 {
135     char_u	*tagname;	/* tag name */
136     fmark_T	fmark;		/* cursor position BEFORE ":tag" */
137     int		cur_match;	/* match number */
138     int		cur_fnum;	/* buffer number used for cur_match */
139 } taggy_T;
140 
141 /*
142  * Structure that contains all options that are local to a window.
143  * Used twice in a window: for the current buffer and for all buffers.
144  * Also used in wininfo_T.
145  */
146 typedef struct
147 {
148 #ifdef FEAT_ARABIC
149     int		wo_arab;
150 # define w_p_arab w_onebuf_opt.wo_arab	/* 'arabic' */
151 #endif
152 #ifdef FEAT_LINEBREAK
153     int		wo_bri;
154 # define w_p_bri w_onebuf_opt.wo_bri	/* 'breakindent' */
155     char_u	*wo_briopt;
156 # define w_p_briopt w_onebuf_opt.wo_briopt /* 'breakindentopt' */
157 #endif
158 #ifdef FEAT_DIFF
159     int		wo_diff;
160 # define w_p_diff w_onebuf_opt.wo_diff	/* 'diff' */
161 #endif
162 #ifdef FEAT_FOLDING
163     long	wo_fdc;
164 # define w_p_fdc w_onebuf_opt.wo_fdc	/* 'foldcolumn' */
165     int		wo_fdc_save;
166 # define w_p_fdc_save w_onebuf_opt.wo_fdc_save	/* 'foldenable' saved for diff mode */
167     int		wo_fen;
168 # define w_p_fen w_onebuf_opt.wo_fen	/* 'foldenable' */
169     int		wo_fen_save;
170 # define w_p_fen_save w_onebuf_opt.wo_fen_save	/* 'foldenable' saved for diff mode */
171     char_u	*wo_fdi;
172 # define w_p_fdi w_onebuf_opt.wo_fdi	/* 'foldignore' */
173     long	wo_fdl;
174 # define w_p_fdl w_onebuf_opt.wo_fdl	/* 'foldlevel' */
175     int		wo_fdl_save;
176 # define w_p_fdl_save w_onebuf_opt.wo_fdl_save	/* 'foldlevel' state saved for diff mode */
177     char_u	*wo_fdm;
178 # define w_p_fdm w_onebuf_opt.wo_fdm	/* 'foldmethod' */
179     char_u	*wo_fdm_save;
180 # define w_p_fdm_save w_onebuf_opt.wo_fdm_save	/* 'fdm' saved for diff mode */
181     long	wo_fml;
182 # define w_p_fml w_onebuf_opt.wo_fml	/* 'foldminlines' */
183     long	wo_fdn;
184 # define w_p_fdn w_onebuf_opt.wo_fdn	/* 'foldnestmax' */
185 # ifdef FEAT_EVAL
186     char_u	*wo_fde;
187 # define w_p_fde w_onebuf_opt.wo_fde	/* 'foldexpr' */
188     char_u	*wo_fdt;
189 #  define w_p_fdt w_onebuf_opt.wo_fdt	/* 'foldtext' */
190 # endif
191     char_u	*wo_fmr;
192 # define w_p_fmr w_onebuf_opt.wo_fmr	/* 'foldmarker' */
193 #endif
194 #ifdef FEAT_LINEBREAK
195     int		wo_lbr;
196 # define w_p_lbr w_onebuf_opt.wo_lbr	/* 'linebreak' */
197 #endif
198     int		wo_list;
199 #define w_p_list w_onebuf_opt.wo_list	/* 'list' */
200     int		wo_nu;
201 #define w_p_nu w_onebuf_opt.wo_nu	/* 'number' */
202     int		wo_rnu;
203 #define w_p_rnu w_onebuf_opt.wo_rnu	/* 'relativenumber' */
204 #ifdef FEAT_LINEBREAK
205     long	wo_nuw;
206 # define w_p_nuw w_onebuf_opt.wo_nuw	/* 'numberwidth' */
207 #endif
208 #if defined(FEAT_WINDOWS)
209     int		wo_wfh;
210 # define w_p_wfh w_onebuf_opt.wo_wfh	/* 'winfixheight' */
211     int		wo_wfw;
212 # define w_p_wfw w_onebuf_opt.wo_wfw	/* 'winfixwidth' */
213 #endif
214 #if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
215     int		wo_pvw;
216 # define w_p_pvw w_onebuf_opt.wo_pvw	/* 'previewwindow' */
217 #endif
218 #ifdef FEAT_RIGHTLEFT
219     int		wo_rl;
220 # define w_p_rl w_onebuf_opt.wo_rl	/* 'rightleft' */
221     char_u	*wo_rlc;
222 # define w_p_rlc w_onebuf_opt.wo_rlc	/* 'rightleftcmd' */
223 #endif
224     long	wo_scr;
225 #define w_p_scr w_onebuf_opt.wo_scr	/* 'scroll' */
226 #ifdef FEAT_SPELL
227     int		wo_spell;
228 # define w_p_spell w_onebuf_opt.wo_spell /* 'spell' */
229 #endif
230 #ifdef FEAT_SYN_HL
231     int		wo_cuc;
232 # define w_p_cuc w_onebuf_opt.wo_cuc	/* 'cursorcolumn' */
233     int		wo_cul;
234 # define w_p_cul w_onebuf_opt.wo_cul	/* 'cursorline' */
235     char_u	*wo_cc;
236 # define w_p_cc w_onebuf_opt.wo_cc	/* 'colorcolumn' */
237 #endif
238 #ifdef FEAT_STL_OPT
239     char_u	*wo_stl;
240 #define w_p_stl w_onebuf_opt.wo_stl	/* 'statusline' */
241 #endif
242 #ifdef FEAT_SCROLLBIND
243     int		wo_scb;
244 # define w_p_scb w_onebuf_opt.wo_scb	/* 'scrollbind' */
245     int		wo_diff_saved; /* options were saved for starting diff mode */
246 # define w_p_diff_saved w_onebuf_opt.wo_diff_saved
247     int		wo_scb_save;	/* 'scrollbind' saved for diff mode*/
248 # define w_p_scb_save w_onebuf_opt.wo_scb_save
249 #endif
250     int		wo_wrap;
251 #define w_p_wrap w_onebuf_opt.wo_wrap	/* 'wrap' */
252 #ifdef FEAT_DIFF
253     int		wo_wrap_save;	/* 'wrap' state saved for diff mode*/
254 # define w_p_wrap_save w_onebuf_opt.wo_wrap_save
255 #endif
256 #ifdef FEAT_CONCEAL
257     char_u	*wo_cocu;		/* 'concealcursor' */
258 # define w_p_cocu w_onebuf_opt.wo_cocu
259     long	wo_cole;		/* 'conceallevel' */
260 # define w_p_cole w_onebuf_opt.wo_cole
261 #endif
262 #ifdef FEAT_CURSORBIND
263     int		wo_crb;
264 # define w_p_crb w_onebuf_opt.wo_crb	/* 'cursorbind' */
265     int		wo_crb_save;	/* 'cursorbind' state saved for diff mode*/
266 # define w_p_crb_save w_onebuf_opt.wo_crb_save
267 #endif
268 #ifdef FEAT_SIGNS
269     char_u	*wo_scl;
270 # define w_p_scl w_onebuf_opt.wo_scl	/* 'signcolumn' */
271 #endif
272 #ifdef FEAT_TERMINAL
273     char_u	*wo_tms;
274 #define w_p_tms w_onebuf_opt.wo_tms	/* 'termsize' */
275 #endif
276 
277 #ifdef FEAT_EVAL
278     int		wo_scriptID[WV_COUNT];	/* SIDs for window-local options */
279 # define w_p_scriptID w_onebuf_opt.wo_scriptID
280 #endif
281 } winopt_T;
282 
283 /*
284  * Window info stored with a buffer.
285  *
286  * Two types of info are kept for a buffer which are associated with a
287  * specific window:
288  * 1. Each window can have a different line number associated with a buffer.
289  * 2. The window-local options for a buffer work in a similar way.
290  * The window-info is kept in a list at b_wininfo.  It is kept in
291  * most-recently-used order.
292  */
293 struct wininfo_S
294 {
295     wininfo_T	*wi_next;	/* next entry or NULL for last entry */
296     wininfo_T	*wi_prev;	/* previous entry or NULL for first entry */
297     win_T	*wi_win;	/* pointer to window that did set wi_fpos */
298     pos_T	wi_fpos;	/* last cursor position in the file */
299     int		wi_optset;	/* TRUE when wi_opt has useful values */
300     winopt_T	wi_opt;		/* local window options */
301 #ifdef FEAT_FOLDING
302     int		wi_fold_manual;	/* copy of w_fold_manual */
303     garray_T	wi_folds;	/* clone of w_folds */
304 #endif
305 };
306 
307 /*
308  * Info used to pass info about a fold from the fold-detection code to the
309  * code that displays the foldcolumn.
310  */
311 typedef struct foldinfo
312 {
313     int		fi_level;	/* level of the fold; when this is zero the
314 				   other fields are invalid */
315     int		fi_lnum;	/* line number where fold starts */
316     int		fi_low_level;	/* lowest fold level that starts in the same
317 				   line */
318 } foldinfo_T;
319 
320 /* Structure to store info about the Visual area. */
321 typedef struct
322 {
323     pos_T	vi_start;	/* start pos of last VIsual */
324     pos_T	vi_end;		/* end position of last VIsual */
325     int		vi_mode;	/* VIsual_mode of last VIsual */
326     colnr_T	vi_curswant;	/* MAXCOL from w_curswant */
327 } visualinfo_T;
328 
329 /*
330  * structures used for undo
331  */
332 
333 typedef struct u_entry u_entry_T;
334 typedef struct u_header u_header_T;
335 struct u_entry
336 {
337     u_entry_T	*ue_next;	/* pointer to next entry in list */
338     linenr_T	ue_top;		/* number of line above undo block */
339     linenr_T	ue_bot;		/* number of line below undo block */
340     linenr_T	ue_lcount;	/* linecount when u_save called */
341     char_u	**ue_array;	/* array of lines in undo block */
342     long	ue_size;	/* number of lines in ue_array */
343 #ifdef U_DEBUG
344     int		ue_magic;	/* magic number to check allocation */
345 #endif
346 };
347 
348 struct u_header
349 {
350     /* The following have a pointer and a number. The number is used when
351      * reading the undo file in u_read_undo() */
352     union {
353 	u_header_T *ptr;	/* pointer to next undo header in list */
354 	long	   seq;
355     } uh_next;
356     union {
357 	u_header_T *ptr;	/* pointer to previous header in list */
358 	long	   seq;
359     } uh_prev;
360     union {
361 	u_header_T *ptr;	/* pointer to next header for alt. redo */
362 	long	   seq;
363     } uh_alt_next;
364     union {
365 	u_header_T *ptr;	/* pointer to previous header for alt. redo */
366 	long	   seq;
367     } uh_alt_prev;
368     long	uh_seq;		/* sequence number, higher == newer undo */
369     int		uh_walk;	/* used by undo_time() */
370     u_entry_T	*uh_entry;	/* pointer to first entry */
371     u_entry_T	*uh_getbot_entry; /* pointer to where ue_bot must be set */
372     pos_T	uh_cursor;	/* cursor position before saving */
373 #ifdef FEAT_VIRTUALEDIT
374     long	uh_cursor_vcol;
375 #endif
376     int		uh_flags;	/* see below */
377     pos_T	uh_namedm[NMARKS];	/* marks before undo/after redo */
378     visualinfo_T uh_visual;	/* Visual areas before undo/after redo */
379     time_T	uh_time;	/* timestamp when the change was made */
380     long	uh_save_nr;	/* set when the file was saved after the
381 				   changes in this block */
382 #ifdef U_DEBUG
383     int		uh_magic;	/* magic number to check allocation */
384 #endif
385 };
386 
387 /* values for uh_flags */
388 #define UH_CHANGED  0x01	/* b_changed flag before undo/after redo */
389 #define UH_EMPTYBUF 0x02	/* buffer was empty */
390 
391 /*
392  * structures used in undo.c
393  */
394 #if VIM_SIZEOF_INT > 2
395 # define ALIGN_LONG	/* longword alignment and use filler byte */
396 # define ALIGN_SIZE (sizeof(long))
397 #else
398 # define ALIGN_SIZE (sizeof(short))
399 #endif
400 
401 #define ALIGN_MASK (ALIGN_SIZE - 1)
402 
403 typedef struct m_info minfo_T;
404 
405 /*
406  * structure used to link chunks in one of the free chunk lists.
407  */
408 struct m_info
409 {
410 #ifdef ALIGN_LONG
411     long_u	m_size;		/* size of the chunk (including m_info) */
412 #else
413     short_u	m_size;		/* size of the chunk (including m_info) */
414 #endif
415     minfo_T	*m_next;	/* pointer to next free chunk in the list */
416 };
417 
418 /*
419  * things used in memfile.c
420  */
421 
422 typedef struct block_hdr    bhdr_T;
423 typedef struct memfile	    memfile_T;
424 typedef long		    blocknr_T;
425 
426 /*
427  * mf_hashtab_T is a chained hashtable with blocknr_T key and arbitrary
428  * structures as items.  This is an intrusive data structure: we require
429  * that items begin with mf_hashitem_T which contains the key and linked
430  * list pointers.  List of items in each bucket is doubly-linked.
431  */
432 
433 typedef struct mf_hashitem_S mf_hashitem_T;
434 
435 struct mf_hashitem_S
436 {
437     mf_hashitem_T   *mhi_next;
438     mf_hashitem_T   *mhi_prev;
439     blocknr_T	    mhi_key;
440 };
441 
442 #define MHT_INIT_SIZE   64
443 
444 typedef struct mf_hashtab_S
445 {
446     long_u	    mht_mask;	    /* mask used for hash value (nr of items
447 				     * in array is "mht_mask" + 1) */
448     long_u	    mht_count;	    /* nr of items inserted into hashtable */
449     mf_hashitem_T   **mht_buckets;  /* points to mht_small_buckets or
450 				     *dynamically allocated array */
451     mf_hashitem_T   *mht_small_buckets[MHT_INIT_SIZE];   /* initial buckets */
452     char	    mht_fixed;	    /* non-zero value forbids growth */
453 } mf_hashtab_T;
454 
455 /*
456  * for each (previously) used block in the memfile there is one block header.
457  *
458  * The block may be linked in the used list OR in the free list.
459  * The used blocks are also kept in hash lists.
460  *
461  * The used list is a doubly linked list, most recently used block first.
462  *	The blocks in the used list have a block of memory allocated.
463  *	mf_used_count is the number of pages in the used list.
464  * The hash lists are used to quickly find a block in the used list.
465  * The free list is a single linked list, not sorted.
466  *	The blocks in the free list have no block of memory allocated and
467  *	the contents of the block in the file (if any) is irrelevant.
468  */
469 
470 struct block_hdr
471 {
472     mf_hashitem_T bh_hashitem;      /* header for hash table and key */
473 #define bh_bnum bh_hashitem.mhi_key /* block number, part of bh_hashitem */
474 
475     bhdr_T	*bh_next;	    /* next block_hdr in free or used list */
476     bhdr_T	*bh_prev;	    /* previous block_hdr in used list */
477     char_u	*bh_data;	    /* pointer to memory (for used block) */
478     int		bh_page_count;	    /* number of pages in this block */
479 
480 #define BH_DIRTY    1
481 #define BH_LOCKED   2
482     char	bh_flags;	    /* BH_DIRTY or BH_LOCKED */
483 };
484 
485 /*
486  * when a block with a negative number is flushed to the file, it gets
487  * a positive number. Because the reference to the block is still the negative
488  * number, we remember the translation to the new positive number in the
489  * double linked trans lists. The structure is the same as the hash lists.
490  */
491 typedef struct nr_trans NR_TRANS;
492 
493 struct nr_trans
494 {
495     mf_hashitem_T nt_hashitem;		/* header for hash table and key */
496 #define nt_old_bnum nt_hashitem.mhi_key	/* old, negative, number */
497 
498     blocknr_T	nt_new_bnum;		/* new, positive, number */
499 };
500 
501 
502 typedef struct buffblock buffblock_T;
503 typedef struct buffheader buffheader_T;
504 
505 /*
506  * structure used to store one block of the stuff/redo/recording buffers
507  */
508 struct buffblock
509 {
510     buffblock_T	*b_next;	/* pointer to next buffblock */
511     char_u	b_str[1];	/* contents (actually longer) */
512 };
513 
514 /*
515  * header used for the stuff buffer and the redo buffer
516  */
517 struct buffheader
518 {
519     buffblock_T	bh_first;	/* first (dummy) block of list */
520     buffblock_T	*bh_curr;	/* buffblock for appending */
521     int		bh_index;	/* index for reading */
522     int		bh_space;	/* space in bh_curr for appending */
523 };
524 
525 typedef struct
526 {
527     buffheader_T sr_redobuff;
528     buffheader_T sr_old_redobuff;
529 } save_redo_T;
530 
531 /*
532  * used for completion on the command line
533  */
534 typedef struct expand
535 {
536     int		xp_context;		/* type of expansion */
537     char_u	*xp_pattern;		/* start of item to expand */
538     int		xp_pattern_len;		/* bytes in xp_pattern before cursor */
539 #if defined(FEAT_USR_CMDS) && defined(FEAT_EVAL) && defined(FEAT_CMDL_COMPL)
540     char_u	*xp_arg;		/* completion function */
541     int		xp_scriptID;		/* SID for completion function */
542 #endif
543     int		xp_backslash;		/* one of the XP_BS_ values */
544 #ifndef BACKSLASH_IN_FILENAME
545     int		xp_shell;		/* TRUE for a shell command, more
546 					   characters need to be escaped */
547 #endif
548     int		xp_numfiles;		/* number of files found by
549 						    file name completion */
550     char_u	**xp_files;		/* list of files */
551     char_u	*xp_line;		/* text being completed */
552     int		xp_col;			/* cursor position in line */
553 } expand_T;
554 
555 /* values for xp_backslash */
556 #define XP_BS_NONE	0	/* nothing special for backslashes */
557 #define XP_BS_ONE	1	/* uses one backslash before a space */
558 #define XP_BS_THREE	2	/* uses three backslashes before a space */
559 
560 /*
561  * Command modifiers ":vertical", ":browse", ":confirm" and ":hide" set a flag.
562  * This needs to be saved for recursive commands, put them in a structure for
563  * easy manipulation.
564  */
565 typedef struct
566 {
567     int		hide;			/* TRUE when ":hide" was used */
568 # ifdef FEAT_BROWSE_CMD
569     int		browse;			/* TRUE to invoke file dialog */
570 # endif
571 # ifdef FEAT_WINDOWS
572     int		split;			/* flags for win_split() */
573     int		tab;			/* > 0 when ":tab" was used */
574 # endif
575 # if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
576     int		confirm;		/* TRUE to invoke yes/no dialog */
577 # endif
578     int		keepalt;		/* TRUE when ":keepalt" was used */
579     int		keepmarks;		/* TRUE when ":keepmarks" was used */
580     int		keepjumps;		/* TRUE when ":keepjumps" was used */
581     int		lockmarks;		/* TRUE when ":lockmarks" was used */
582     int		keeppatterns;		/* TRUE when ":keeppatterns" was used */
583     int		noswapfile;		/* TRUE when ":noswapfile" was used */
584 # ifdef FEAT_AUTOCMD
585     char_u	*save_ei;		/* saved value of 'eventignore' */
586 # endif
587     regmatch_T	filter_regmatch;	/* set by :filter /pat/ */
588     int		filter_force;		/* set for :filter! */
589 } cmdmod_T;
590 
591 #define MF_SEED_LEN	8
592 
593 struct memfile
594 {
595     char_u	*mf_fname;		/* name of the file */
596     char_u	*mf_ffname;		/* idem, full path */
597     int		mf_fd;			/* file descriptor */
598     bhdr_T	*mf_free_first;		/* first block_hdr in free list */
599     bhdr_T	*mf_used_first;		/* mru block_hdr in used list */
600     bhdr_T	*mf_used_last;		/* lru block_hdr in used list */
601     unsigned	mf_used_count;		/* number of pages in used list */
602     unsigned	mf_used_count_max;	/* maximum number of pages in memory */
603     mf_hashtab_T mf_hash;		/* hash lists */
604     mf_hashtab_T mf_trans;		/* trans lists */
605     blocknr_T	mf_blocknr_max;		/* highest positive block number + 1*/
606     blocknr_T	mf_blocknr_min;		/* lowest negative block number - 1 */
607     blocknr_T	mf_neg_count;		/* number of negative blocks numbers */
608     blocknr_T	mf_infile_count;	/* number of pages in the file */
609     unsigned	mf_page_size;		/* number of bytes in a page */
610     int		mf_dirty;		/* TRUE if there are dirty blocks */
611 #ifdef FEAT_CRYPT
612     buf_T	*mf_buffer;		/* buffer this memfile is for */
613     char_u	mf_seed[MF_SEED_LEN];	/* seed for encryption */
614 
615     /* Values for key, method and seed used for reading data blocks when
616      * updating for a newly set key or method. Only when mf_old_key != NULL. */
617     char_u	*mf_old_key;
618     int		mf_old_cm;
619     char_u	mf_old_seed[MF_SEED_LEN];
620 #endif
621 };
622 
623 /*
624  * things used in memline.c
625  */
626 /*
627  * When searching for a specific line, we remember what blocks in the tree
628  * are the branches leading to that block. This is stored in ml_stack.  Each
629  * entry is a pointer to info in a block (may be data block or pointer block)
630  */
631 typedef struct info_pointer
632 {
633     blocknr_T	ip_bnum;	/* block number */
634     linenr_T	ip_low;		/* lowest lnum in this block */
635     linenr_T	ip_high;	/* highest lnum in this block */
636     int		ip_index;	/* index for block with current lnum */
637 } infoptr_T;	/* block/index pair */
638 
639 #ifdef FEAT_BYTEOFF
640 typedef struct ml_chunksize
641 {
642     int		mlcs_numlines;
643     long	mlcs_totalsize;
644 } chunksize_T;
645 
646  /* Flags when calling ml_updatechunk() */
647 
648 #define ML_CHNK_ADDLINE 1
649 #define ML_CHNK_DELLINE 2
650 #define ML_CHNK_UPDLINE 3
651 #endif
652 
653 /*
654  * the memline structure holds all the information about a memline
655  */
656 typedef struct memline
657 {
658     linenr_T	ml_line_count;	/* number of lines in the buffer */
659 
660     memfile_T	*ml_mfp;	/* pointer to associated memfile */
661 
662 #define ML_EMPTY	1	/* empty buffer */
663 #define ML_LINE_DIRTY	2	/* cached line was changed and allocated */
664 #define ML_LOCKED_DIRTY	4	/* ml_locked was changed */
665 #define ML_LOCKED_POS	8	/* ml_locked needs positive block number */
666     int		ml_flags;
667 
668     infoptr_T	*ml_stack;	/* stack of pointer blocks (array of IPTRs) */
669     int		ml_stack_top;	/* current top of ml_stack */
670     int		ml_stack_size;	/* total number of entries in ml_stack */
671 
672     linenr_T	ml_line_lnum;	/* line number of cached line, 0 if not valid */
673     char_u	*ml_line_ptr;	/* pointer to cached line */
674 
675     bhdr_T	*ml_locked;	/* block used by last ml_get */
676     linenr_T	ml_locked_low;	/* first line in ml_locked */
677     linenr_T	ml_locked_high;	/* last line in ml_locked */
678     int		ml_locked_lineadd;  /* number of lines inserted in ml_locked */
679 #ifdef FEAT_BYTEOFF
680     chunksize_T *ml_chunksize;
681     int		ml_numchunks;
682     int		ml_usedchunks;
683 #endif
684 } memline_T;
685 
686 #if defined(FEAT_SIGNS) || defined(PROTO)
687 typedef struct signlist signlist_T;
688 
689 struct signlist
690 {
691     int		id;		/* unique identifier for each placed sign */
692     linenr_T	lnum;		/* line number which has this sign */
693     int		typenr;		/* typenr of sign */
694     signlist_T	*next;		/* next signlist entry */
695 # ifdef FEAT_NETBEANS_INTG
696     signlist_T  *prev;		/* previous entry -- for easy reordering */
697 # endif
698 };
699 
700 /* type argument for buf_getsigntype() */
701 #define SIGN_ANY	0
702 #define SIGN_LINEHL	1
703 #define SIGN_ICON	2
704 #define SIGN_TEXT	3
705 #endif
706 
707 /*
708  * Argument list: Array of file names.
709  * Used for the global argument list and the argument lists local to a window.
710  */
711 typedef struct arglist
712 {
713     garray_T	al_ga;		/* growarray with the array of file names */
714     int		al_refcount;	/* number of windows using this arglist */
715     int		id;		/* id of this arglist */
716 } alist_T;
717 
718 /*
719  * For each argument remember the file name as it was given, and the buffer
720  * number that contains the expanded file name (required for when ":cd" is
721  * used.
722  */
723 typedef struct argentry
724 {
725     char_u	*ae_fname;	/* file name as specified */
726     int		ae_fnum;	/* buffer number with expanded file name */
727 } aentry_T;
728 
729 #ifdef FEAT_WINDOWS
730 # define ALIST(win) (win)->w_alist
731 #else
732 # define ALIST(win) (&global_alist)
733 #endif
734 #define GARGLIST	((aentry_T *)global_alist.al_ga.ga_data)
735 #define ARGLIST		((aentry_T *)ALIST(curwin)->al_ga.ga_data)
736 #define WARGLIST(wp)	((aentry_T *)ALIST(wp)->al_ga.ga_data)
737 #define AARGLIST(al)	((aentry_T *)((al)->al_ga.ga_data))
738 #define GARGCOUNT	(global_alist.al_ga.ga_len)
739 #define ARGCOUNT	(ALIST(curwin)->al_ga.ga_len)
740 #define WARGCOUNT(wp)	(ALIST(wp)->al_ga.ga_len)
741 
742 /*
743  * A list used for saving values of "emsg_silent".  Used by ex_try() to save the
744  * value of "emsg_silent" if it was non-zero.  When this is done, the CSF_SILENT
745  * flag below is set.
746  */
747 
748 typedef struct eslist_elem eslist_T;
749 struct eslist_elem
750 {
751     int		saved_emsg_silent;	/* saved value of "emsg_silent" */
752     eslist_T	*next;			/* next element on the list */
753 };
754 
755 /*
756  * For conditional commands a stack is kept of nested conditionals.
757  * When cs_idx < 0, there is no conditional command.
758  */
759 #define CSTACK_LEN	50
760 
761 struct condstack
762 {
763     short	cs_flags[CSTACK_LEN];	/* CSF_ flags */
764     char	cs_pending[CSTACK_LEN];	/* CSTP_: what's pending in ":finally"*/
765     union {
766 	void	*csp_rv[CSTACK_LEN];	/* return typeval for pending return */
767 	void	*csp_ex[CSTACK_LEN];	/* exception for pending throw */
768     }		cs_pend;
769     void	*cs_forinfo[CSTACK_LEN]; /* info used by ":for" */
770     int		cs_line[CSTACK_LEN];	/* line nr of ":while"/":for" line */
771     int		cs_idx;			/* current entry, or -1 if none */
772     int		cs_looplevel;		/* nr of nested ":while"s and ":for"s */
773     int		cs_trylevel;		/* nr of nested ":try"s */
774     eslist_T	*cs_emsg_silent_list;	/* saved values of "emsg_silent" */
775     char	cs_lflags;		/* loop flags: CSL_ flags */
776 };
777 # define cs_rettv	cs_pend.csp_rv
778 # define cs_exception	cs_pend.csp_ex
779 
780 /* There is no CSF_IF, the lack of CSF_WHILE, CSF_FOR and CSF_TRY means ":if"
781  * was used. */
782 # define CSF_TRUE	0x0001	/* condition was TRUE */
783 # define CSF_ACTIVE	0x0002	/* current state is active */
784 # define CSF_ELSE	0x0004	/* ":else" has been passed */
785 # define CSF_WHILE	0x0008	/* is a ":while" */
786 # define CSF_FOR	0x0010	/* is a ":for" */
787 
788 # define CSF_TRY	0x0100	/* is a ":try" */
789 # define CSF_FINALLY	0x0200	/* ":finally" has been passed */
790 # define CSF_THROWN	0x0400	/* exception thrown to this try conditional */
791 # define CSF_CAUGHT	0x0800  /* exception caught by this try conditional */
792 # define CSF_SILENT	0x1000	/* "emsg_silent" reset by ":try" */
793 /* Note that CSF_ELSE is only used when CSF_TRY and CSF_WHILE are unset
794  * (an ":if"), and CSF_SILENT is only used when CSF_TRY is set. */
795 
796 /*
797  * What's pending for being reactivated at the ":endtry" of this try
798  * conditional:
799  */
800 # define CSTP_NONE	0	/* nothing pending in ":finally" clause */
801 # define CSTP_ERROR	1	/* an error is pending */
802 # define CSTP_INTERRUPT	2	/* an interrupt is pending */
803 # define CSTP_THROW	4	/* a throw is pending */
804 # define CSTP_BREAK	8	/* ":break" is pending */
805 # define CSTP_CONTINUE	16	/* ":continue" is pending */
806 # define CSTP_RETURN	24	/* ":return" is pending */
807 # define CSTP_FINISH	32	/* ":finish" is pending */
808 
809 /*
810  * Flags for the cs_lflags item in struct condstack.
811  */
812 # define CSL_HAD_LOOP	 1	/* just found ":while" or ":for" */
813 # define CSL_HAD_ENDLOOP 2	/* just found ":endwhile" or ":endfor" */
814 # define CSL_HAD_CONT	 4	/* just found ":continue" */
815 # define CSL_HAD_FINA	 8	/* just found ":finally" */
816 
817 /*
818  * A list of error messages that can be converted to an exception.  "throw_msg"
819  * is only set in the first element of the list.  Usually, it points to the
820  * original message stored in that element, but sometimes it points to a later
821  * message in the list.  See cause_errthrow() below.
822  */
823 struct msglist
824 {
825     char_u		*msg;		/* original message */
826     char_u		*throw_msg;	/* msg to throw: usually original one */
827     struct msglist	*next;		/* next of several messages in a row */
828 };
829 
830 /*
831  * The exception types.
832  */
833 typedef enum
834 {
835     ET_USER,		/* exception caused by ":throw" command */
836     ET_ERROR,		/* error exception */
837     ET_INTERRUPT	/* interrupt exception triggered by Ctrl-C */
838 } except_type_T;
839 
840 /*
841  * Structure describing an exception.
842  * (don't use "struct exception", it's used by the math library).
843  */
844 typedef struct vim_exception except_T;
845 struct vim_exception
846 {
847     except_type_T	type;		/* exception type */
848     char_u		*value;		/* exception value */
849     struct msglist	*messages;	/* message(s) causing error exception */
850     char_u		*throw_name;	/* name of the throw point */
851     linenr_T		throw_lnum;	/* line number of the throw point */
852     except_T		*caught;	/* next exception on the caught stack */
853 };
854 
855 /*
856  * Structure to save the error/interrupt/exception state between calls to
857  * enter_cleanup() and leave_cleanup().  Must be allocated as an automatic
858  * variable by the (common) caller of these functions.
859  */
860 typedef struct cleanup_stuff cleanup_T;
861 struct cleanup_stuff
862 {
863     int pending;		/* error/interrupt/exception state */
864     except_T *exception;	/* exception value */
865 };
866 
867 #ifdef FEAT_SYN_HL
868 /* struct passed to in_id_list() */
869 struct sp_syn
870 {
871     int		inc_tag;	/* ":syn include" unique tag */
872     short	id;		/* highlight group ID of item */
873     short	*cont_in_list;	/* cont.in group IDs, if non-zero */
874 };
875 
876 /*
877  * Each keyword has one keyentry, which is linked in a hash list.
878  */
879 typedef struct keyentry keyentry_T;
880 
881 struct keyentry
882 {
883     keyentry_T	*ke_next;	/* next entry with identical "keyword[]" */
884     struct sp_syn k_syn;	/* struct passed to in_id_list() */
885     short	*next_list;	/* ID list for next match (if non-zero) */
886     int		flags;
887     int		k_char;		/* conceal substitute character */
888     char_u	keyword[1];	/* actually longer */
889 };
890 
891 /*
892  * Struct used to store one state of the state stack.
893  */
894 typedef struct buf_state
895 {
896     int		    bs_idx;	 /* index of pattern */
897     int		    bs_flags;	 /* flags for pattern */
898 #ifdef FEAT_CONCEAL
899     int		    bs_seqnr;	 /* stores si_seqnr */
900     int		    bs_cchar;	 /* stores si_cchar */
901 #endif
902     reg_extmatch_T *bs_extmatch; /* external matches from start pattern */
903 } bufstate_T;
904 
905 /*
906  * syn_state contains the syntax state stack for the start of one line.
907  * Used by b_sst_array[].
908  */
909 typedef struct syn_state synstate_T;
910 
911 struct syn_state
912 {
913     synstate_T	*sst_next;	/* next entry in used or free list */
914     linenr_T	sst_lnum;	/* line number for this state */
915     union
916     {
917 	bufstate_T	sst_stack[SST_FIX_STATES]; /* short state stack */
918 	garray_T	sst_ga;	/* growarray for long state stack */
919     } sst_union;
920     int		sst_next_flags;	/* flags for sst_next_list */
921     int		sst_stacksize;	/* number of states on the stack */
922     short	*sst_next_list;	/* "nextgroup" list in this state
923 				 * (this is a copy, don't free it! */
924     disptick_T	sst_tick;	/* tick when last displayed */
925     linenr_T	sst_change_lnum;/* when non-zero, change in this line
926 				 * may have made the state invalid */
927 };
928 #endif /* FEAT_SYN_HL */
929 
930 /*
931  * Structure shared between syntax.c, screen.c and gui_x11.c.
932  */
933 typedef struct attr_entry
934 {
935     short	    ae_attr;		/* HL_BOLD, etc. */
936     union
937     {
938 	struct
939 	{
940 	    char_u	    *start;	/* start escape sequence */
941 	    char_u	    *stop;	/* stop escape sequence */
942 	} term;
943 	struct
944 	{
945 	    /* These colors need to be > 8 bits to hold 256. */
946 	    short_u	    fg_color;	/* foreground color number */
947 	    short_u	    bg_color;	/* background color number */
948 # ifdef FEAT_TERMGUICOLORS
949 	    guicolor_T	    fg_rgb;	/* foreground color RGB */
950 	    guicolor_T	    bg_rgb;	/* background color RGB */
951 # endif
952 	} cterm;
953 # ifdef FEAT_GUI
954 	struct
955 	{
956 	    guicolor_T	    fg_color;	/* foreground color handle */
957 	    guicolor_T	    bg_color;	/* background color handle */
958 	    guicolor_T	    sp_color;	/* special color handle */
959 	    GuiFont	    font;	/* font handle */
960 #  ifdef FEAT_XFONTSET
961 	    GuiFontset	    fontset;	/* fontset handle */
962 #  endif
963 	} gui;
964 # endif
965     } ae_u;
966 } attrentry_T;
967 
968 #ifdef USE_ICONV
969 # ifdef HAVE_ICONV_H
970 #  include <iconv.h>
971 # else
972 #  if defined(MACOS_X)
973 #   include <sys/errno.h>
974 #   define EILSEQ ENOENT /* MacOS X does not have EILSEQ */
975 typedef struct _iconv_t *iconv_t;
976 #  else
977 #   if defined(MACOS_CLASSIC)
978 typedef struct _iconv_t *iconv_t;
979 #    define EINVAL	22
980 #    define E2BIG	7
981 #    define ENOENT	2
982 #    define EFAULT	14
983 #    define EILSEQ	123
984 #   else
985 #    include <errno.h>
986 #   endif
987 #  endif
988 typedef void *iconv_t;
989 # endif
990 #endif
991 
992 /*
993  * Used for the typeahead buffer: typebuf.
994  */
995 typedef struct
996 {
997     char_u	*tb_buf;	/* buffer for typed characters */
998     char_u	*tb_noremap;	/* mapping flags for characters in tb_buf[] */
999     int		tb_buflen;	/* size of tb_buf[] */
1000     int		tb_off;		/* current position in tb_buf[] */
1001     int		tb_len;		/* number of valid bytes in tb_buf[] */
1002     int		tb_maplen;	/* nr of mapped bytes in tb_buf[] */
1003     int		tb_silent;	/* nr of silently mapped bytes in tb_buf[] */
1004     int		tb_no_abbr_cnt; /* nr of bytes without abbrev. in tb_buf[] */
1005     int		tb_change_cnt;	/* nr of time tb_buf was changed; never zero */
1006 } typebuf_T;
1007 
1008 /* Struct to hold the saved typeahead for save_typeahead(). */
1009 typedef struct
1010 {
1011     typebuf_T		save_typebuf;
1012     int			typebuf_valid;	    /* TRUE when save_typebuf valid */
1013     int			old_char;
1014     int			old_mod_mask;
1015     buffheader_T	save_readbuf1;
1016     buffheader_T	save_readbuf2;
1017 #ifdef USE_INPUT_BUF
1018     char_u		*save_inputbuf;
1019 #endif
1020 } tasave_T;
1021 
1022 /*
1023  * Used for conversion of terminal I/O and script files.
1024  */
1025 typedef struct
1026 {
1027     int		vc_type;	/* zero or one of the CONV_ values */
1028     int		vc_factor;	/* max. expansion factor */
1029 # ifdef WIN3264
1030     int		vc_cpfrom;	/* codepage to convert from (CONV_CODEPAGE) */
1031     int		vc_cpto;	/* codepage to convert to (CONV_CODEPAGE) */
1032 # endif
1033 # ifdef USE_ICONV
1034     iconv_t	vc_fd;		/* for CONV_ICONV */
1035 # endif
1036     int		vc_fail;	/* fail for invalid char, don't use '?' */
1037 } vimconv_T;
1038 
1039 /*
1040  * Structure used for reading from the viminfo file.
1041  */
1042 typedef struct
1043 {
1044     char_u	*vir_line;	/* text of the current line */
1045     FILE	*vir_fd;	/* file descriptor */
1046 #ifdef FEAT_MBYTE
1047     vimconv_T	vir_conv;	/* encoding conversion */
1048 #endif
1049     int		vir_version;	/* viminfo version detected or -1 */
1050     garray_T	vir_barlines;	/* lines starting with | */
1051 } vir_T;
1052 
1053 #define CONV_NONE		0
1054 #define CONV_TO_UTF8		1
1055 #define CONV_9_TO_UTF8		2
1056 #define CONV_TO_LATIN1		3
1057 #define CONV_TO_LATIN9		4
1058 #define CONV_ICONV		5
1059 #ifdef WIN3264
1060 # define CONV_CODEPAGE		10	/* codepage -> codepage */
1061 #endif
1062 #ifdef MACOS_X
1063 # define CONV_MAC_LATIN1	20
1064 # define CONV_LATIN1_MAC	21
1065 # define CONV_MAC_UTF8		22
1066 # define CONV_UTF8_MAC		23
1067 #endif
1068 
1069 /*
1070  * Structure used for mappings and abbreviations.
1071  */
1072 typedef struct mapblock mapblock_T;
1073 struct mapblock
1074 {
1075     mapblock_T	*m_next;	/* next mapblock in list */
1076     char_u	*m_keys;	/* mapped from, lhs */
1077     char_u	*m_str;		/* mapped to, rhs */
1078     char_u	*m_orig_str;	/* rhs as entered by the user */
1079     int		m_keylen;	/* strlen(m_keys) */
1080     int		m_mode;		/* valid mode */
1081     int		m_noremap;	/* if non-zero no re-mapping for m_str */
1082     char	m_silent;	/* <silent> used, don't echo commands */
1083     char	m_nowait;	/* <nowait> used */
1084 #ifdef FEAT_EVAL
1085     char	m_expr;		/* <expr> used, m_str is an expression */
1086     scid_T	m_script_ID;	/* ID of script where map was defined */
1087 #endif
1088 };
1089 
1090 /*
1091  * Used for highlighting in the status line.
1092  */
1093 struct stl_hlrec
1094 {
1095     char_u	*start;
1096     int		userhl;		/* 0: no HL, 1-9: User HL, < 0 for syn ID */
1097 };
1098 
1099 
1100 /*
1101  * Syntax items - usually buffer-specific.
1102  */
1103 
1104 /* Item for a hashtable.  "hi_key" can be one of three values:
1105  * NULL:	   Never been used
1106  * HI_KEY_REMOVED: Entry was removed
1107  * Otherwise:	   Used item, pointer to the actual key; this usually is
1108  *		   inside the item, subtract an offset to locate the item.
1109  *		   This reduces the size of hashitem by 1/3.
1110  */
1111 typedef struct hashitem_S
1112 {
1113     long_u	hi_hash;	/* cached hash number of hi_key */
1114     char_u	*hi_key;
1115 } hashitem_T;
1116 
1117 /* The address of "hash_removed" is used as a magic number for hi_key to
1118  * indicate a removed item. */
1119 #define HI_KEY_REMOVED &hash_removed
1120 #define HASHITEM_EMPTY(hi) ((hi)->hi_key == NULL || (hi)->hi_key == &hash_removed)
1121 
1122 /* Initial size for a hashtable.  Our items are relatively small and growing
1123  * is expensive, thus use 16 as a start.  Must be a power of 2. */
1124 #define HT_INIT_SIZE 16
1125 
1126 typedef struct hashtable_S
1127 {
1128     long_u	ht_mask;	/* mask used for hash value (nr of items in
1129 				 * array is "ht_mask" + 1) */
1130     long_u	ht_used;	/* number of items used */
1131     long_u	ht_filled;	/* number of items used + removed */
1132     int		ht_locked;	/* counter for hash_lock() */
1133     int		ht_error;	/* when set growing failed, can't add more
1134 				   items before growing works */
1135     hashitem_T	*ht_array;	/* points to the array, allocated when it's
1136 				   not "ht_smallarray" */
1137     hashitem_T	ht_smallarray[HT_INIT_SIZE];   /* initial array */
1138 } hashtab_T;
1139 
1140 typedef long_u hash_T;		/* Type for hi_hash */
1141 
1142 
1143 #ifdef FEAT_NUM64
1144 /* Use 64-bit Number. */
1145 # ifdef WIN3264
1146 #  ifdef PROTO
1147 typedef long		    varnumber_T;
1148 typedef unsigned long	    uvarnumber_T;
1149 #define VARNUM_MIN	    LONG_MIN
1150 #define VARNUM_MAX	    LONG_MAX
1151 #define UVARNUM_MAX	    ULONG_MAX
1152 #  else
1153 typedef __int64		    varnumber_T;
1154 typedef unsigned __int64    uvarnumber_T;
1155 #define VARNUM_MIN	    _I64_MIN
1156 #define VARNUM_MAX	    _I64_MAX
1157 #define UVARNUM_MAX	    _UI64_MAX
1158 #  endif
1159 # elif defined(HAVE_STDINT_H)
1160 typedef int64_t		    varnumber_T;
1161 typedef uint64_t	    uvarnumber_T;
1162 #define VARNUM_MIN	    INT64_MIN
1163 #define VARNUM_MAX	    INT64_MAX
1164 #define UVARNUM_MAX	    UINT64_MAX
1165 # else
1166 typedef long		    varnumber_T;
1167 typedef unsigned long	    uvarnumber_T;
1168 #define VARNUM_MIN	    LONG_MIN
1169 #define VARNUM_MAX	    LONG_MAX
1170 #define UVARNUM_MAX	    ULONG_MAX
1171 # endif
1172 #else
1173 /* Use 32-bit Number. */
1174 # if VIM_SIZEOF_INT <= 3	/* use long if int is smaller than 32 bits */
1175 typedef long		    varnumber_T;
1176 typedef unsigned long	    uvarnumber_T;
1177 #define VARNUM_MIN	    LONG_MIN
1178 #define VARNUM_MAX	    LONG_MAX
1179 #define UVARNUM_MAX	    ULONG_MAX
1180 # else
1181 typedef int		    varnumber_T;
1182 typedef unsigned int	    uvarnumber_T;
1183 #define VARNUM_MIN	    INT_MIN
1184 #define VARNUM_MAX	    INT_MAX
1185 #define UVARNUM_MAX	    UINT_MAX
1186 # endif
1187 #endif
1188 
1189 typedef double	float_T;
1190 
1191 typedef struct listvar_S list_T;
1192 typedef struct dictvar_S dict_T;
1193 typedef struct partial_S partial_T;
1194 
1195 typedef struct jobvar_S job_T;
1196 typedef struct readq_S readq_T;
1197 typedef struct jsonq_S jsonq_T;
1198 typedef struct cbq_S cbq_T;
1199 typedef struct channel_S channel_T;
1200 
1201 typedef enum
1202 {
1203     VAR_UNKNOWN = 0,
1204     VAR_NUMBER,	 /* "v_number" is used */
1205     VAR_STRING,	 /* "v_string" is used */
1206     VAR_FUNC,	 /* "v_string" is function name */
1207     VAR_PARTIAL, /* "v_partial" is used */
1208     VAR_LIST,	 /* "v_list" is used */
1209     VAR_DICT,	 /* "v_dict" is used */
1210     VAR_FLOAT,	 /* "v_float" is used */
1211     VAR_SPECIAL, /* "v_number" is used */
1212     VAR_JOB,	 /* "v_job" is used */
1213     VAR_CHANNEL	 /* "v_channel" is used */
1214 } vartype_T;
1215 
1216 /*
1217  * Structure to hold an internal variable without a name.
1218  */
1219 typedef struct
1220 {
1221     vartype_T	v_type;
1222     char	v_lock;	    /* see below: VAR_LOCKED, VAR_FIXED */
1223     union
1224     {
1225 	varnumber_T	v_number;	/* number value */
1226 #ifdef FEAT_FLOAT
1227 	float_T		v_float;	/* floating number value */
1228 #endif
1229 	char_u		*v_string;	/* string value (can be NULL!) */
1230 	list_T		*v_list;	/* list value (can be NULL!) */
1231 	dict_T		*v_dict;	/* dict value (can be NULL!) */
1232 	partial_T	*v_partial;	/* closure: function with args */
1233 #ifdef FEAT_JOB_CHANNEL
1234 	job_T		*v_job;		/* job value (can be NULL!) */
1235 	channel_T	*v_channel;	/* channel value (can be NULL!) */
1236 #endif
1237     }		vval;
1238 } typval_T;
1239 
1240 /* Values for "dv_scope". */
1241 #define VAR_SCOPE     1	/* a:, v:, s:, etc. scope dictionaries */
1242 #define VAR_DEF_SCOPE 2	/* l:, g: scope dictionaries: here funcrefs are not
1243 			   allowed to mask existing functions */
1244 
1245 /* Values for "v_lock". */
1246 #define VAR_LOCKED  1	/* locked with lock(), can use unlock() */
1247 #define VAR_FIXED   2	/* locked forever */
1248 
1249 /*
1250  * Structure to hold an item of a list: an internal variable without a name.
1251  */
1252 typedef struct listitem_S listitem_T;
1253 
1254 struct listitem_S
1255 {
1256     listitem_T	*li_next;	/* next item in list */
1257     listitem_T	*li_prev;	/* previous item in list */
1258     typval_T	li_tv;		/* type and value of the variable */
1259 };
1260 
1261 /*
1262  * Struct used by those that are using an item in a list.
1263  */
1264 typedef struct listwatch_S listwatch_T;
1265 
1266 struct listwatch_S
1267 {
1268     listitem_T		*lw_item;	/* item being watched */
1269     listwatch_T		*lw_next;	/* next watcher */
1270 };
1271 
1272 /*
1273  * Structure to hold info about a list.
1274  */
1275 struct listvar_S
1276 {
1277     listitem_T	*lv_first;	/* first item, NULL if none */
1278     listitem_T	*lv_last;	/* last item, NULL if none */
1279     int		lv_refcount;	/* reference count */
1280     int		lv_len;		/* number of items */
1281     listwatch_T	*lv_watch;	/* first watcher, NULL if none */
1282     int		lv_idx;		/* cached index of an item */
1283     listitem_T	*lv_idx_item;	/* when not NULL item at index "lv_idx" */
1284     int		lv_copyID;	/* ID used by deepcopy() */
1285     list_T	*lv_copylist;	/* copied list used by deepcopy() */
1286     char	lv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1287     list_T	*lv_used_next;	/* next list in used lists list */
1288     list_T	*lv_used_prev;	/* previous list in used lists list */
1289 };
1290 
1291 /*
1292  * Static list with 10 items.  Use init_static_list() to initialize.
1293  */
1294 typedef struct {
1295     list_T	sl_list;	/* must be first */
1296     listitem_T	sl_items[10];
1297 } staticList10_T;
1298 
1299 /*
1300  * Structure to hold an item of a Dictionary.
1301  * Also used for a variable.
1302  * The key is copied into "di_key" to avoid an extra alloc/free for it.
1303  */
1304 struct dictitem_S
1305 {
1306     typval_T	di_tv;		/* type and value of the variable */
1307     char_u	di_flags;	/* flags (only used for variable) */
1308     char_u	di_key[1];	/* key (actually longer!) */
1309 };
1310 typedef struct dictitem_S dictitem_T;
1311 
1312 /* A dictitem with a 16 character key (plus NUL). */
1313 struct dictitem16_S
1314 {
1315     typval_T	di_tv;		/* type and value of the variable */
1316     char_u	di_flags;	/* flags (only used for variable) */
1317     char_u	di_key[17];	/* key */
1318 };
1319 typedef struct dictitem16_S dictitem16_T;
1320 
1321 #define DI_FLAGS_RO	1  /* "di_flags" value: read-only variable */
1322 #define DI_FLAGS_RO_SBX 2  /* "di_flags" value: read-only in the sandbox */
1323 #define DI_FLAGS_FIX	4  /* "di_flags" value: fixed: no :unlet or remove() */
1324 #define DI_FLAGS_LOCK	8  /* "di_flags" value: locked variable */
1325 #define DI_FLAGS_ALLOC	16 /* "di_flags" value: separately allocated */
1326 
1327 /*
1328  * Structure to hold info about a Dictionary.
1329  */
1330 struct dictvar_S
1331 {
1332     char	dv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1333     char	dv_scope;	/* zero, VAR_SCOPE, VAR_DEF_SCOPE */
1334     int		dv_refcount;	/* reference count */
1335     int		dv_copyID;	/* ID used by deepcopy() */
1336     hashtab_T	dv_hashtab;	/* hashtab that refers to the items */
1337     dict_T	*dv_copydict;	/* copied dict used by deepcopy() */
1338     dict_T	*dv_used_next;	/* next dict in used dicts list */
1339     dict_T	*dv_used_prev;	/* previous dict in used dicts list */
1340 };
1341 
1342 #if defined(FEAT_EVAL) || defined(PROTO)
1343 typedef struct funccall_S funccall_T;
1344 
1345 /*
1346  * Structure to hold info for a user function.
1347  */
1348 typedef struct
1349 {
1350     int		uf_varargs;	/* variable nr of arguments */
1351     int		uf_flags;
1352     int		uf_calls;	/* nr of active calls */
1353     int		uf_cleared;	/* func_clear() was already called */
1354     garray_T	uf_args;	/* arguments */
1355     garray_T	uf_lines;	/* function lines */
1356 #ifdef FEAT_PROFILE
1357     int		uf_profiling;	/* TRUE when func is being profiled */
1358     /* profiling the function as a whole */
1359     int		uf_tm_count;	/* nr of calls */
1360     proftime_T	uf_tm_total;	/* time spent in function + children */
1361     proftime_T	uf_tm_self;	/* time spent in function itself */
1362     proftime_T	uf_tm_children;	/* time spent in children this call */
1363     /* profiling the function per line */
1364     int		*uf_tml_count;	/* nr of times line was executed */
1365     proftime_T	*uf_tml_total;	/* time spent in a line + children */
1366     proftime_T	*uf_tml_self;	/* time spent in a line itself */
1367     proftime_T	uf_tml_start;	/* start time for current line */
1368     proftime_T	uf_tml_children; /* time spent in children for this line */
1369     proftime_T	uf_tml_wait;	/* start wait time for current line */
1370     int		uf_tml_idx;	/* index of line being timed; -1 if none */
1371     int		uf_tml_execed;	/* line being timed was executed */
1372 #endif
1373     scid_T	uf_script_ID;	/* ID of script where function was defined,
1374 				   used for s: variables */
1375     int		uf_refcount;	/* reference count, see func_name_refcount() */
1376     funccall_T	*uf_scoped;	/* l: local variables for closure */
1377     char_u	uf_name[1];	/* name of function (actually longer); can
1378 				   start with <SNR>123_ (<SNR> is K_SPECIAL
1379 				   KS_EXTRA KE_SNR) */
1380 } ufunc_T;
1381 
1382 #define MAX_FUNC_ARGS	20	/* maximum number of function arguments */
1383 #define VAR_SHORT_LEN	20	/* short variable name length */
1384 #define FIXVAR_CNT	12	/* number of fixed variables */
1385 
1386 /* structure to hold info for a function that is currently being executed. */
1387 struct funccall_S
1388 {
1389     ufunc_T	*func;		/* function being called */
1390     int		linenr;		/* next line to be executed */
1391     int		returned;	/* ":return" used */
1392     struct			/* fixed variables for arguments */
1393     {
1394 	dictitem_T	var;		/* variable (without room for name) */
1395 	char_u	room[VAR_SHORT_LEN];	/* room for the name */
1396     } fixvar[FIXVAR_CNT];
1397     dict_T	l_vars;		/* l: local function variables */
1398     dictitem_T	l_vars_var;	/* variable for l: scope */
1399     dict_T	l_avars;	/* a: argument variables */
1400     dictitem_T	l_avars_var;	/* variable for a: scope */
1401     list_T	l_varlist;	/* list for a:000 */
1402     listitem_T	l_listitems[MAX_FUNC_ARGS];	/* listitems for a:000 */
1403     typval_T	*rettv;		/* return value */
1404     linenr_T	breakpoint;	/* next line with breakpoint or zero */
1405     int		dbg_tick;	/* debug_tick when breakpoint was set */
1406     int		level;		/* top nesting level of executed function */
1407 #ifdef FEAT_PROFILE
1408     proftime_T	prof_child;	/* time spent in a child */
1409 #endif
1410     funccall_T	*caller;	/* calling function or NULL */
1411 
1412     /* for closure */
1413     int		fc_refcount;	/* number of user functions that reference this
1414 				 * funccal */
1415     int		fc_copyID;	/* for garbage collection */
1416     garray_T	fc_funcs;	/* list of ufunc_T* which keep a reference to
1417 				 * "func" */
1418 };
1419 
1420 /*
1421  * Struct used by trans_function_name()
1422  */
1423 typedef struct
1424 {
1425     dict_T	*fd_dict;	/* Dictionary used */
1426     char_u	*fd_newkey;	/* new key in "dict" in allocated memory */
1427     dictitem_T	*fd_di;		/* Dictionary item used */
1428 } funcdict_T;
1429 
1430 #else
1431 /* dummy typedefs for function prototypes */
1432 typedef struct
1433 {
1434     int	    dummy;
1435 } ufunc_T;
1436 typedef struct
1437 {
1438     int	    dummy;
1439 } funcdict_T;
1440 #endif
1441 
1442 struct partial_S
1443 {
1444     int		pt_refcount;	/* reference count */
1445     char_u	*pt_name;	/* function name; when NULL use
1446 				 * pt_func->uf_name */
1447     ufunc_T	*pt_func;	/* function pointer; when NULL lookup function
1448 				 * with pt_name */
1449     int		pt_auto;	/* when TRUE the partial was created for using
1450 				   dict.member in handle_subscript() */
1451     int		pt_argc;	/* number of arguments */
1452     typval_T	*pt_argv;	/* arguments in allocated array */
1453     dict_T	*pt_dict;	/* dict for "self" */
1454 };
1455 
1456 /* Status of a job.  Order matters! */
1457 typedef enum
1458 {
1459     JOB_FAILED,
1460     JOB_STARTED,
1461     JOB_ENDED,	    /* detected job done */
1462     JOB_FINISHED    /* job done and cleanup done */
1463 } jobstatus_T;
1464 
1465 /*
1466  * Structure to hold info about a Job.
1467  */
1468 struct jobvar_S
1469 {
1470     job_T	*jv_next;
1471     job_T	*jv_prev;
1472 #ifdef UNIX
1473     pid_t	jv_pid;
1474 #endif
1475 #ifdef WIN32
1476     PROCESS_INFORMATION	jv_proc_info;
1477     HANDLE		jv_job_object;
1478 #endif
1479     jobstatus_T	jv_status;
1480     char_u	*jv_stoponexit; /* allocated */
1481     int		jv_exitval;
1482     char_u	*jv_exit_cb;	/* allocated */
1483     partial_T	*jv_exit_partial;
1484 
1485     buf_T	*jv_in_buf;	/* buffer from "in-name" */
1486 
1487     int		jv_refcount;	/* reference count */
1488     int		jv_copyID;
1489 
1490     channel_T	*jv_channel;	/* channel for I/O, reference counted */
1491 };
1492 
1493 /*
1494  * Structures to hold info about a Channel.
1495  */
1496 struct readq_S
1497 {
1498     char_u	*rq_buffer;
1499     long_u	rq_buflen;
1500     readq_T	*rq_next;
1501     readq_T	*rq_prev;
1502 };
1503 
1504 struct jsonq_S
1505 {
1506     typval_T	*jq_value;
1507     jsonq_T	*jq_next;
1508     jsonq_T	*jq_prev;
1509     int		jq_no_callback; /* TRUE when no callback was found */
1510 };
1511 
1512 struct cbq_S
1513 {
1514     char_u	*cq_callback;
1515     partial_T	*cq_partial;
1516     int		cq_seq_nr;
1517     cbq_T	*cq_next;
1518     cbq_T	*cq_prev;
1519 };
1520 
1521 /* mode for a channel */
1522 typedef enum
1523 {
1524     MODE_NL = 0,
1525     MODE_RAW,
1526     MODE_JSON,
1527     MODE_JS
1528 } ch_mode_T;
1529 
1530 typedef enum {
1531     JIO_PIPE,	    /* default */
1532     JIO_NULL,
1533     JIO_FILE,
1534     JIO_BUFFER,
1535     JIO_OUT
1536 } job_io_T;
1537 
1538 /* Ordering matters, it is used in for loops: IN is last, only SOCK/OUT/ERR
1539  * are polled. */
1540 typedef enum {
1541     PART_SOCK = 0,
1542 #define CH_SOCK_FD	ch_part[PART_SOCK].ch_fd
1543 #ifdef FEAT_JOB_CHANNEL
1544     PART_OUT,
1545 # define CH_OUT_FD	ch_part[PART_OUT].ch_fd
1546     PART_ERR,
1547 # define CH_ERR_FD	ch_part[PART_ERR].ch_fd
1548     PART_IN,
1549 # define CH_IN_FD	ch_part[PART_IN].ch_fd
1550 #endif
1551     PART_COUNT
1552 } ch_part_T;
1553 
1554 #define INVALID_FD	(-1)
1555 
1556 /* The per-fd info for a channel. */
1557 typedef struct {
1558     sock_T	ch_fd;	    /* socket/stdin/stdout/stderr, -1 if not used */
1559 
1560 # if defined(UNIX) && !defined(HAVE_SELECT)
1561     int		ch_poll_idx;	/* used by channel_poll_setup() */
1562 # endif
1563 
1564 #ifdef FEAT_GUI_X11
1565     XtInputId	ch_inputHandler; /* Cookie for input */
1566 #endif
1567 #ifdef FEAT_GUI_GTK
1568     gint	ch_inputHandler; /* Cookie for input */
1569 #endif
1570 
1571     ch_mode_T	ch_mode;
1572     job_io_T	ch_io;
1573     int		ch_timeout;	/* request timeout in msec */
1574 
1575     readq_T	ch_head;	/* header for circular raw read queue */
1576     jsonq_T	ch_json_head;	/* header for circular json read queue */
1577     int		ch_block_id;	/* ID that channel_read_json_block() is
1578 				   waiting for */
1579     /* When ch_wait_len is non-zero use ch_deadline to wait for incomplete
1580      * message to be complete. The value is the length of the incomplete
1581      * message when the deadline was set.  If it gets longer (something was
1582      * received) the deadline is reset. */
1583     size_t	ch_wait_len;
1584 #ifdef WIN32
1585     DWORD	ch_deadline;
1586 #else
1587     struct timeval ch_deadline;
1588 #endif
1589     int		ch_block_write;	/* for testing: 0 when not used, -1 when write
1590 				 * does not block, 1 simulate blocking */
1591 
1592     cbq_T	ch_cb_head;	/* dummy node for per-request callbacks */
1593     char_u	*ch_callback;	/* call when a msg is not handled */
1594     partial_T	*ch_partial;
1595 
1596     bufref_T	ch_bufref;	/* buffer to read from or write to */
1597     int		ch_nomodifiable; /* TRUE when buffer can be 'nomodifiable' */
1598     int		ch_nomod_error;	/* TRUE when e_modifiable was given */
1599     int		ch_buf_append;	/* write appended lines instead top-bot */
1600     linenr_T	ch_buf_top;	/* next line to send */
1601     linenr_T	ch_buf_bot;	/* last line to send */
1602 } chanpart_T;
1603 
1604 struct channel_S {
1605     channel_T	*ch_next;
1606     channel_T	*ch_prev;
1607 
1608     int		ch_id;		/* ID of the channel */
1609     int		ch_last_msg_id;	/* ID of the last message */
1610 
1611     chanpart_T	ch_part[PART_COUNT]; /* info for socket, out, err and in */
1612 
1613     char	*ch_hostname;	/* only for socket, allocated */
1614     int		ch_port;	/* only for socket */
1615 
1616     int		ch_to_be_closed; /* bitset of readable fds to be closed.
1617 				  * When all readable fds have been closed,
1618 				  * set to (1 << PART_COUNT). */
1619     int		ch_to_be_freed; /* When TRUE channel must be freed when it's
1620 				 * safe to invoke callbacks. */
1621     int		ch_error;	/* When TRUE an error was reported.  Avoids
1622 				 * giving pages full of error messages when
1623 				 * the other side has exited, only mention the
1624 				 * first error until the connection works
1625 				 * again. */
1626 
1627     void	(*ch_nb_close_cb)(void);
1628 				/* callback for Netbeans when channel is
1629 				 * closed */
1630 
1631     char_u	*ch_callback;	/* call when any msg is not handled */
1632     partial_T	*ch_partial;
1633     char_u	*ch_close_cb;	/* call when channel is closed */
1634     partial_T	*ch_close_partial;
1635     int		ch_drop_never;
1636 
1637     job_T	*ch_job;	/* Job that uses this channel; this does not
1638 				 * count as a reference to avoid a circular
1639 				 * reference, the job refers to the channel. */
1640     int		ch_job_killed;	/* TRUE when there was a job and it was killed
1641 				 * or we know it died. */
1642 
1643     int		ch_refcount;	/* reference count */
1644     int		ch_copyID;
1645 };
1646 
1647 #define JO_MODE		    0x0001	/* channel mode */
1648 #define JO_IN_MODE	    0x0002	/* stdin mode */
1649 #define JO_OUT_MODE	    0x0004	/* stdout mode */
1650 #define JO_ERR_MODE	    0x0008	/* stderr mode */
1651 #define JO_CALLBACK	    0x0010	/* channel callback */
1652 #define JO_OUT_CALLBACK	    0x0020	/* stdout callback */
1653 #define JO_ERR_CALLBACK	    0x0040	/* stderr callback */
1654 #define JO_CLOSE_CALLBACK   0x0080	/* close callback */
1655 #define JO_WAITTIME	    0x0100	/* only for ch_open() */
1656 #define JO_TIMEOUT	    0x0200	/* all timeouts */
1657 #define JO_OUT_TIMEOUT	    0x0400	/* stdout timeouts */
1658 #define JO_ERR_TIMEOUT	    0x0800	/* stderr timeouts */
1659 #define JO_PART		    0x1000	/* "part" */
1660 #define JO_ID		    0x2000	/* "id" */
1661 #define JO_STOPONEXIT	    0x4000	/* "stoponexit" */
1662 #define JO_EXIT_CB	    0x8000	/* "exit_cb" */
1663 #define JO_OUT_IO	    0x10000	/* "out_io" */
1664 #define JO_ERR_IO	    0x20000	/* "err_io" (JO_OUT_IO << 1) */
1665 #define JO_IN_IO	    0x40000	/* "in_io" (JO_OUT_IO << 2) */
1666 #define JO_OUT_NAME	    0x80000	/* "out_name" */
1667 #define JO_ERR_NAME	    0x100000	/* "err_name" (JO_OUT_NAME << 1) */
1668 #define JO_IN_NAME	    0x200000	/* "in_name" (JO_OUT_NAME << 2) */
1669 #define JO_IN_TOP	    0x400000	/* "in_top" */
1670 #define JO_IN_BOT	    0x800000	/* "in_bot" */
1671 #define JO_OUT_BUF	    0x1000000	/* "out_buf" */
1672 #define JO_ERR_BUF	    0x2000000	/* "err_buf" (JO_OUT_BUF << 1) */
1673 #define JO_IN_BUF	    0x4000000	/* "in_buf" (JO_OUT_BUF << 2) */
1674 #define JO_CHANNEL	    0x8000000	/* "channel" */
1675 #define JO_BLOCK_WRITE	    0x10000000	/* "block_write" */
1676 #define JO_OUT_MODIFIABLE   0x20000000	/* "out_modifiable" */
1677 #define JO_ERR_MODIFIABLE   0x40000000	/* "err_modifiable" (JO_OUT_ << 1) */
1678 #define JO_ALL		    0x7fffffff
1679 
1680 #define JO2_OUT_MSG	    0x0001	/* "out_msg" */
1681 #define JO2_ERR_MSG	    0x0002	/* "err_msg" (JO_OUT_ << 1) */
1682 #define JO2_ALL		    0x0003
1683 
1684 #define JO_MODE_ALL	(JO_MODE + JO_IN_MODE + JO_OUT_MODE + JO_ERR_MODE)
1685 #define JO_CB_ALL \
1686     (JO_CALLBACK + JO_OUT_CALLBACK + JO_ERR_CALLBACK + JO_CLOSE_CALLBACK)
1687 #define JO_TIMEOUT_ALL	(JO_TIMEOUT + JO_OUT_TIMEOUT + JO_ERR_TIMEOUT)
1688 
1689 /*
1690  * Options for job and channel commands.
1691  */
1692 typedef struct
1693 {
1694     int		jo_set;		/* JO_ bits for values that were set */
1695     int		jo_set2;	/* JO2_ bits for values that were set */
1696 
1697     ch_mode_T	jo_mode;
1698     ch_mode_T	jo_in_mode;
1699     ch_mode_T	jo_out_mode;
1700     ch_mode_T	jo_err_mode;
1701 
1702     job_io_T	jo_io[4];	/* PART_OUT, PART_ERR, PART_IN */
1703     char_u	jo_io_name_buf[4][NUMBUFLEN];
1704     char_u	*jo_io_name[4];	/* not allocated! */
1705     int		jo_io_buf[4];
1706     int		jo_modifiable[4];
1707     int		jo_message[4];
1708     channel_T	*jo_channel;
1709 
1710     linenr_T	jo_in_top;
1711     linenr_T	jo_in_bot;
1712 
1713     char_u	*jo_callback;	/* not allocated! */
1714     partial_T	*jo_partial;	/* not referenced! */
1715     char_u	*jo_out_cb;	/* not allocated! */
1716     partial_T	*jo_out_partial; /* not referenced! */
1717     char_u	*jo_err_cb;	/* not allocated! */
1718     partial_T	*jo_err_partial; /* not referenced! */
1719     char_u	*jo_close_cb;	/* not allocated! */
1720     partial_T	*jo_close_partial; /* not referenced! */
1721     char_u	*jo_exit_cb;	/* not allocated! */
1722     partial_T	*jo_exit_partial; /* not referenced! */
1723     int		jo_drop_never;
1724     int		jo_waittime;
1725     int		jo_timeout;
1726     int		jo_out_timeout;
1727     int		jo_err_timeout;
1728     int		jo_block_write;	/* for testing only */
1729     int		jo_part;
1730     int		jo_id;
1731     char_u	jo_soe_buf[NUMBUFLEN];
1732     char_u	*jo_stoponexit;
1733 } jobopt_T;
1734 
1735 
1736 /* structure used for explicit stack while garbage collecting hash tables */
1737 typedef struct ht_stack_S
1738 {
1739     hashtab_T		*ht;
1740     struct ht_stack_S	*prev;
1741 } ht_stack_T;
1742 
1743 /* structure used for explicit stack while garbage collecting lists */
1744 typedef struct list_stack_S
1745 {
1746     list_T		*list;
1747     struct list_stack_S	*prev;
1748 } list_stack_T;
1749 
1750 /* values for b_syn_spell: what to do with toplevel text */
1751 #define SYNSPL_DEFAULT	0	/* spell check if @Spell not defined */
1752 #define SYNSPL_TOP	1	/* spell check toplevel text */
1753 #define SYNSPL_NOTOP	2	/* don't spell check toplevel text */
1754 
1755 /* avoid #ifdefs for when b_spell is not available */
1756 #ifdef FEAT_SPELL
1757 # define B_SPELL(buf)  ((buf)->b_spell)
1758 #else
1759 # define B_SPELL(buf)  (0)
1760 #endif
1761 
1762 #ifdef FEAT_QUICKFIX
1763 typedef struct qf_info_S qf_info_T;
1764 #endif
1765 
1766 #ifdef FEAT_PROFILE
1767 /*
1768  * Used for :syntime: timing of executing a syntax pattern.
1769  */
1770 typedef struct {
1771     proftime_T	total;		/* total time used */
1772     proftime_T	slowest;	/* time of slowest call */
1773     long	count;		/* nr of times used */
1774     long	match;		/* nr of times matched */
1775 } syn_time_T;
1776 #endif
1777 
1778 #ifdef FEAT_CRYPT
1779 /*
1780  * Structure to hold the type of encryption and the state of encryption or
1781  * decryption.
1782  */
1783 typedef struct {
1784     int	    method_nr;
1785     void    *method_state;  /* method-specific state information */
1786 } cryptstate_T;
1787 
1788 /* values for method_nr */
1789 # define CRYPT_M_ZIP	0
1790 # define CRYPT_M_BF	1
1791 # define CRYPT_M_BF2	2
1792 # define CRYPT_M_COUNT	3 /* number of crypt methods */
1793 #endif
1794 
1795 
1796 /*
1797  * These are items normally related to a buffer.  But when using ":ownsyntax"
1798  * a window may have its own instance.
1799  */
1800 typedef struct {
1801 #ifdef FEAT_SYN_HL
1802     hashtab_T	b_keywtab;		/* syntax keywords hash table */
1803     hashtab_T	b_keywtab_ic;		/* idem, ignore case */
1804     int		b_syn_error;		/* TRUE when error occurred in HL */
1805 # ifdef FEAT_RELTIME
1806     int		b_syn_slow;		/* TRUE when 'redrawtime' reached */
1807 # endif
1808     int		b_syn_ic;		/* ignore case for :syn cmds */
1809     int		b_syn_spell;		/* SYNSPL_ values */
1810     garray_T	b_syn_patterns;		/* table for syntax patterns */
1811     garray_T	b_syn_clusters;		/* table for syntax clusters */
1812     int		b_spell_cluster_id;	/* @Spell cluster ID or 0 */
1813     int		b_nospell_cluster_id;	/* @NoSpell cluster ID or 0 */
1814     int		b_syn_containedin;	/* TRUE when there is an item with a
1815 					   "containedin" argument */
1816     int		b_syn_sync_flags;	/* flags about how to sync */
1817     short	b_syn_sync_id;		/* group to sync on */
1818     long	b_syn_sync_minlines;	/* minimal sync lines offset */
1819     long	b_syn_sync_maxlines;	/* maximal sync lines offset */
1820     long	b_syn_sync_linebreaks;	/* offset for multi-line pattern */
1821     char_u	*b_syn_linecont_pat;	/* line continuation pattern */
1822     regprog_T	*b_syn_linecont_prog;	/* line continuation program */
1823 #ifdef FEAT_PROFILE
1824     syn_time_T  b_syn_linecont_time;
1825 #endif
1826     int		b_syn_linecont_ic;	/* ignore-case flag for above */
1827     int		b_syn_topgrp;		/* for ":syntax include" */
1828 # ifdef FEAT_CONCEAL
1829     int		b_syn_conceal;		/* auto-conceal for :syn cmds */
1830 # endif
1831 # ifdef FEAT_FOLDING
1832     int		b_syn_folditems;	/* number of patterns with the HL_FOLD
1833 					   flag set */
1834 # endif
1835     /*
1836      * b_sst_array[] contains the state stack for a number of lines, for the
1837      * start of that line (col == 0).  This avoids having to recompute the
1838      * syntax state too often.
1839      * b_sst_array[] is allocated to hold the state for all displayed lines,
1840      * and states for 1 out of about 20 other lines.
1841      * b_sst_array	pointer to an array of synstate_T
1842      * b_sst_len	number of entries in b_sst_array[]
1843      * b_sst_first	pointer to first used entry in b_sst_array[] or NULL
1844      * b_sst_firstfree	pointer to first free entry in b_sst_array[] or NULL
1845      * b_sst_freecount	number of free entries in b_sst_array[]
1846      * b_sst_check_lnum	entries after this lnum need to be checked for
1847      *			validity (MAXLNUM means no check needed)
1848      */
1849     synstate_T	*b_sst_array;
1850     int		b_sst_len;
1851     synstate_T	*b_sst_first;
1852     synstate_T	*b_sst_firstfree;
1853     int		b_sst_freecount;
1854     linenr_T	b_sst_check_lnum;
1855     short_u	b_sst_lasttick;	/* last display tick */
1856 #endif /* FEAT_SYN_HL */
1857 
1858 #ifdef FEAT_SPELL
1859     /* for spell checking */
1860     garray_T	b_langp;	/* list of pointers to slang_T, see spell.c */
1861     char_u	b_spell_ismw[256];/* flags: is midword char */
1862 # ifdef FEAT_MBYTE
1863     char_u	*b_spell_ismw_mb; /* multi-byte midword chars */
1864 # endif
1865     char_u	*b_p_spc;	/* 'spellcapcheck' */
1866     regprog_T	*b_cap_prog;	/* program for 'spellcapcheck' */
1867     char_u	*b_p_spf;	/* 'spellfile' */
1868     char_u	*b_p_spl;	/* 'spelllang' */
1869 # ifdef FEAT_MBYTE
1870     int		b_cjk;		/* all CJK letters as OK */
1871 # endif
1872 #endif
1873 #if !defined(FEAT_SYN_HL) && !defined(FEAT_SPELL)
1874     int		dummy;
1875 #endif
1876     char_u	b_syn_chartab[32];	/* syntax iskeyword option */
1877     char_u	*b_syn_isk;		/* iskeyword option */
1878 } synblock_T;
1879 
1880 
1881 /*
1882  * buffer: structure that holds information about one file
1883  *
1884  * Several windows can share a single Buffer
1885  * A buffer is unallocated if there is no memfile for it.
1886  * A buffer is new if the associated file has never been loaded yet.
1887  */
1888 
1889 struct file_buffer
1890 {
1891     memline_T	b_ml;		/* associated memline (also contains line
1892 				   count) */
1893 
1894     buf_T	*b_next;	/* links in list of buffers */
1895     buf_T	*b_prev;
1896 
1897     int		b_nwindows;	/* nr of windows open on this buffer */
1898 
1899     int		b_flags;	/* various BF_ flags */
1900 #ifdef FEAT_AUTOCMD
1901     int		b_locked;	/* Buffer is being closed or referenced, don't
1902 				   let autocommands wipe it out. */
1903 #endif
1904 
1905     /*
1906      * b_ffname has the full path of the file (NULL for no name).
1907      * b_sfname is the name as the user typed it (or NULL).
1908      * b_fname is the same as b_sfname, unless ":cd" has been done,
1909      *		then it is the same as b_ffname (NULL for no name).
1910      */
1911     char_u	*b_ffname;	/* full path file name */
1912     char_u	*b_sfname;	/* short file name */
1913     char_u	*b_fname;	/* current file name */
1914 
1915 #ifdef UNIX
1916     int		b_dev_valid;	/* TRUE when b_dev has a valid number */
1917     dev_t	b_dev;		/* device number */
1918     ino_t	b_ino;		/* inode number */
1919 #endif
1920 #ifdef FEAT_CW_EDITOR
1921     FSSpec	b_FSSpec;	/* MacOS File Identification */
1922 #endif
1923 #ifdef VMS
1924     char	 b_fab_rfm;	/* Record format    */
1925     char	 b_fab_rat;	/* Record attribute */
1926     unsigned int b_fab_mrs;	/* Max record size  */
1927 #endif
1928     int		b_fnum;		/* buffer number for this file. */
1929     char_u	b_key[VIM_SIZEOF_INT * 2 + 1];
1930 				/* key used for buf_hashtab, holds b_fnum as
1931 				   hex string */
1932 
1933     int		b_changed;	/* 'modified': Set to TRUE if something in the
1934 				   file has been changed and not written out. */
1935     dictitem16_T b_ct_di;	/* holds the b:changedtick value in
1936 				   b_ct_di.di_tv.vval.v_number;
1937 				   incremented for each change, also for undo */
1938 #define CHANGEDTICK(buf) ((buf)->b_ct_di.di_tv.vval.v_number)
1939 
1940     int		b_saving;	/* Set to TRUE if we are in the middle of
1941 				   saving the buffer. */
1942 
1943     /*
1944      * Changes to a buffer require updating of the display.  To minimize the
1945      * work, remember changes made and update everything at once.
1946      */
1947     int		b_mod_set;	/* TRUE when there are changes since the last
1948 				   time the display was updated */
1949     linenr_T	b_mod_top;	/* topmost lnum that was changed */
1950     linenr_T	b_mod_bot;	/* lnum below last changed line, AFTER the
1951 				   change */
1952     long	b_mod_xlines;	/* number of extra buffer lines inserted;
1953 				   negative when lines were deleted */
1954 
1955     wininfo_T	*b_wininfo;	/* list of last used info for each window */
1956 
1957     long	b_mtime;	/* last change time of original file */
1958     long	b_mtime_read;	/* last change time when reading */
1959     off_T	b_orig_size;	/* size of original file in bytes */
1960     int		b_orig_mode;	/* mode of original file */
1961 #ifdef FEAT_VIMINFO
1962     time_T	b_last_used;	/* time when the buffer was last used; used
1963 				 * for viminfo */
1964 #endif
1965 
1966     pos_T	b_namedm[NMARKS]; /* current named marks (mark.c) */
1967 
1968     /* These variables are set when VIsual_active becomes FALSE */
1969     visualinfo_T b_visual;
1970 #ifdef FEAT_EVAL
1971     int		b_visual_mode_eval;  /* b_visual.vi_mode for visualmode() */
1972 #endif
1973 
1974     pos_T	b_last_cursor;	/* cursor position when last unloading this
1975 				   buffer */
1976     pos_T	b_last_insert;	/* where Insert mode was left */
1977     pos_T	b_last_change;	/* position of last change: '. mark */
1978 
1979 #ifdef FEAT_JUMPLIST
1980     /*
1981      * the changelist contains old change positions
1982      */
1983     pos_T	b_changelist[JUMPLISTSIZE];
1984     int		b_changelistlen;	/* number of active entries */
1985     int		b_new_change;		/* set by u_savecommon() */
1986 #endif
1987 
1988     /*
1989      * Character table, only used in charset.c for 'iskeyword'
1990      * 32 bytes of 8 bits: 1 bit per character 0-255.
1991      */
1992     char_u	b_chartab[32];
1993 
1994 #ifdef FEAT_LOCALMAP
1995     /* Table used for mappings local to a buffer. */
1996     mapblock_T	*(b_maphash[256]);
1997 
1998     /* First abbreviation local to a buffer. */
1999     mapblock_T	*b_first_abbr;
2000 #endif
2001 #ifdef FEAT_USR_CMDS
2002     /* User commands local to the buffer. */
2003     garray_T	b_ucmds;
2004 #endif
2005     /*
2006      * start and end of an operator, also used for '[ and ']
2007      */
2008     pos_T	b_op_start;
2009     pos_T	b_op_start_orig;  /* used for Insstart_orig */
2010     pos_T	b_op_end;
2011 
2012 #ifdef FEAT_VIMINFO
2013     int		b_marks_read;	/* Have we read viminfo marks yet? */
2014 #endif
2015 
2016     /*
2017      * The following only used in undo.c.
2018      */
2019     u_header_T	*b_u_oldhead;	/* pointer to oldest header */
2020     u_header_T	*b_u_newhead;	/* pointer to newest header; may not be valid
2021 				   if b_u_curhead is not NULL */
2022     u_header_T	*b_u_curhead;	/* pointer to current header */
2023     int		b_u_numhead;	/* current number of headers */
2024     int		b_u_synced;	/* entry lists are synced */
2025     long	b_u_seq_last;	/* last used undo sequence number */
2026     long	b_u_save_nr_last; /* counter for last file write */
2027     long	b_u_seq_cur;	/* hu_seq of header below which we are now */
2028     time_T	b_u_time_cur;	/* uh_time of header below which we are now */
2029     long	b_u_save_nr_cur; /* file write nr after which we are now */
2030 
2031     /*
2032      * variables for "U" command in undo.c
2033      */
2034     char_u	*b_u_line_ptr;	/* saved line for "U" command */
2035     linenr_T	b_u_line_lnum;	/* line number of line in u_line */
2036     colnr_T	b_u_line_colnr;	/* optional column number */
2037 
2038 #ifdef FEAT_INS_EXPAND
2039     int		b_scanned;	/* ^N/^P have scanned this buffer */
2040 #endif
2041 
2042     /* flags for use of ":lmap" and IM control */
2043     long	b_p_iminsert;	/* input mode for insert */
2044     long	b_p_imsearch;	/* input mode for search */
2045 #define B_IMODE_USE_INSERT -1	/*	Use b_p_iminsert value for search */
2046 #define B_IMODE_NONE 0		/*	Input via none */
2047 #define B_IMODE_LMAP 1		/*	Input via langmap */
2048 #ifndef USE_IM_CONTROL
2049 # define B_IMODE_LAST 1
2050 #else
2051 # define B_IMODE_IM 2		/*	Input via input method */
2052 # define B_IMODE_LAST 2
2053 #endif
2054 
2055 #ifdef FEAT_KEYMAP
2056     short	b_kmap_state;	/* using "lmap" mappings */
2057 # define KEYMAP_INIT	1	/* 'keymap' was set, call keymap_init() */
2058 # define KEYMAP_LOADED	2	/* 'keymap' mappings have been loaded */
2059     garray_T	b_kmap_ga;	/* the keymap table */
2060 #endif
2061 
2062     /*
2063      * Options local to a buffer.
2064      * They are here because their value depends on the type of file
2065      * or contents of the file being edited.
2066      */
2067     int		b_p_initialized;	/* set when options initialized */
2068 
2069 #ifdef FEAT_EVAL
2070     int		b_p_scriptID[BV_COUNT];	/* SIDs for buffer-local options */
2071 #endif
2072 
2073     int		b_p_ai;		/* 'autoindent' */
2074     int		b_p_ai_nopaste;	/* b_p_ai saved for paste mode */
2075     char_u	*b_p_bkc;	/* 'backupcopy' */
2076     unsigned	b_bkc_flags;    /* flags for 'backupcopy' */
2077     int		b_p_ci;		/* 'copyindent' */
2078     int		b_p_bin;	/* 'binary' */
2079 #ifdef FEAT_MBYTE
2080     int		b_p_bomb;	/* 'bomb' */
2081 #endif
2082 #ifdef FEAT_QUICKFIX
2083     char_u	*b_p_bh;	/* 'bufhidden' */
2084     char_u	*b_p_bt;	/* 'buftype' */
2085 #define BUF_HAS_QF_ENTRY 1
2086 #define BUF_HAS_LL_ENTRY 2
2087     int		b_has_qf_entry;
2088 #endif
2089     int		b_p_bl;		/* 'buflisted' */
2090 #ifdef FEAT_CINDENT
2091     int		b_p_cin;	/* 'cindent' */
2092     char_u	*b_p_cino;	/* 'cinoptions' */
2093     char_u	*b_p_cink;	/* 'cinkeys' */
2094 #endif
2095 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
2096     char_u	*b_p_cinw;	/* 'cinwords' */
2097 #endif
2098 #ifdef FEAT_COMMENTS
2099     char_u	*b_p_com;	/* 'comments' */
2100 #endif
2101 #ifdef FEAT_FOLDING
2102     char_u	*b_p_cms;	/* 'commentstring' */
2103 #endif
2104 #ifdef FEAT_INS_EXPAND
2105     char_u	*b_p_cpt;	/* 'complete' */
2106 #endif
2107 #ifdef FEAT_COMPL_FUNC
2108     char_u	*b_p_cfu;	/* 'completefunc' */
2109     char_u	*b_p_ofu;	/* 'omnifunc' */
2110 #endif
2111     int		b_p_eol;	/* 'endofline' */
2112     int		b_p_fixeol;	/* 'fixendofline' */
2113     int		b_p_et;		/* 'expandtab' */
2114     int		b_p_et_nobin;	/* b_p_et saved for binary mode */
2115     int	        b_p_et_nopaste; /* b_p_et saved for paste mode */
2116 #ifdef FEAT_MBYTE
2117     char_u	*b_p_fenc;	/* 'fileencoding' */
2118 #endif
2119     char_u	*b_p_ff;	/* 'fileformat' */
2120 #ifdef FEAT_AUTOCMD
2121     char_u	*b_p_ft;	/* 'filetype' */
2122 #endif
2123     char_u	*b_p_fo;	/* 'formatoptions' */
2124     char_u	*b_p_flp;	/* 'formatlistpat' */
2125     int		b_p_inf;	/* 'infercase' */
2126     char_u	*b_p_isk;	/* 'iskeyword' */
2127 #ifdef FEAT_FIND_ID
2128     char_u	*b_p_def;	/* 'define' local value */
2129     char_u	*b_p_inc;	/* 'include' */
2130 # ifdef FEAT_EVAL
2131     char_u	*b_p_inex;	/* 'includeexpr' */
2132     long_u	b_p_inex_flags;	/* flags for 'includeexpr' */
2133 # endif
2134 #endif
2135 #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
2136     char_u	*b_p_inde;	/* 'indentexpr' */
2137     long_u	b_p_inde_flags;	/* flags for 'indentexpr' */
2138     char_u	*b_p_indk;	/* 'indentkeys' */
2139 #endif
2140     char_u	*b_p_fp;	/* 'formatprg' */
2141 #if defined(FEAT_EVAL)
2142     char_u	*b_p_fex;	/* 'formatexpr' */
2143     long_u	b_p_fex_flags;	/* flags for 'formatexpr' */
2144 #endif
2145 #ifdef FEAT_CRYPT
2146     char_u	*b_p_key;	/* 'key' */
2147 #endif
2148     char_u	*b_p_kp;	/* 'keywordprg' */
2149 #ifdef FEAT_LISP
2150     int		b_p_lisp;	/* 'lisp' */
2151 #endif
2152 #ifdef FEAT_MBYTE
2153     char_u	*b_p_menc;	/* 'makeencoding' */
2154 #endif
2155     char_u	*b_p_mps;	/* 'matchpairs' */
2156     int		b_p_ml;		/* 'modeline' */
2157     int		b_p_ml_nobin;	/* b_p_ml saved for binary mode */
2158     int		b_p_ma;		/* 'modifiable' */
2159     char_u	*b_p_nf;	/* 'nrformats' */
2160     int		b_p_pi;		/* 'preserveindent' */
2161 #ifdef FEAT_TEXTOBJ
2162     char_u	*b_p_qe;	/* 'quoteescape' */
2163 #endif
2164     int		b_p_ro;		/* 'readonly' */
2165     long	b_p_sw;		/* 'shiftwidth' */
2166     int		b_p_sn;		/* 'shortname' */
2167 #ifdef FEAT_SMARTINDENT
2168     int		b_p_si;		/* 'smartindent' */
2169 #endif
2170     long	b_p_sts;	/* 'softtabstop' */
2171     long	b_p_sts_nopaste; /* b_p_sts saved for paste mode */
2172 #ifdef FEAT_SEARCHPATH
2173     char_u	*b_p_sua;	/* 'suffixesadd' */
2174 #endif
2175     int		b_p_swf;	/* 'swapfile' */
2176 #ifdef FEAT_SYN_HL
2177     long	b_p_smc;	/* 'synmaxcol' */
2178     char_u	*b_p_syn;	/* 'syntax' */
2179 #endif
2180     long	b_p_ts;		/* 'tabstop' */
2181     int		b_p_tx;		/* 'textmode' */
2182     long	b_p_tw;		/* 'textwidth' */
2183     long	b_p_tw_nobin;	/* b_p_tw saved for binary mode */
2184     long	b_p_tw_nopaste;	/* b_p_tw saved for paste mode */
2185     long	b_p_wm;		/* 'wrapmargin' */
2186     long	b_p_wm_nobin;	/* b_p_wm saved for binary mode */
2187     long	b_p_wm_nopaste;	/* b_p_wm saved for paste mode */
2188 #ifdef FEAT_KEYMAP
2189     char_u	*b_p_keymap;	/* 'keymap' */
2190 #endif
2191 
2192     /* local values for options which are normally global */
2193 #ifdef FEAT_QUICKFIX
2194     char_u	*b_p_gp;	/* 'grepprg' local value */
2195     char_u	*b_p_mp;	/* 'makeprg' local value */
2196     char_u	*b_p_efm;	/* 'errorformat' local value */
2197 #endif
2198     char_u	*b_p_ep;	/* 'equalprg' local value */
2199     char_u	*b_p_path;	/* 'path' local value */
2200     int		b_p_ar;		/* 'autoread' local value */
2201     char_u	*b_p_tags;	/* 'tags' local value */
2202     char_u	*b_p_tc;	/* 'tagcase' local value */
2203     unsigned	b_tc_flags;     /* flags for 'tagcase' */
2204 #ifdef FEAT_INS_EXPAND
2205     char_u	*b_p_dict;	/* 'dictionary' local value */
2206     char_u	*b_p_tsr;	/* 'thesaurus' local value */
2207 #endif
2208     long	b_p_ul;		/* 'undolevels' local value */
2209 #ifdef FEAT_PERSISTENT_UNDO
2210     int		b_p_udf;	/* 'undofile' */
2211 #endif
2212 #ifdef FEAT_LISP
2213     char_u	*b_p_lw;	/* 'lispwords' local value */
2214 #endif
2215 
2216     /* end of buffer options */
2217 
2218 #ifdef FEAT_CINDENT
2219     /* values set from b_p_cino */
2220     int		b_ind_level;
2221     int		b_ind_open_imag;
2222     int		b_ind_no_brace;
2223     int		b_ind_first_open;
2224     int		b_ind_open_extra;
2225     int		b_ind_close_extra;
2226     int		b_ind_open_left_imag;
2227     int		b_ind_jump_label;
2228     int		b_ind_case;
2229     int		b_ind_case_code;
2230     int		b_ind_case_break;
2231     int		b_ind_param;
2232     int		b_ind_func_type;
2233     int		b_ind_comment;
2234     int		b_ind_in_comment;
2235     int		b_ind_in_comment2;
2236     int		b_ind_cpp_baseclass;
2237     int		b_ind_continuation;
2238     int		b_ind_unclosed;
2239     int		b_ind_unclosed2;
2240     int		b_ind_unclosed_noignore;
2241     int		b_ind_unclosed_wrapped;
2242     int		b_ind_unclosed_whiteok;
2243     int		b_ind_matching_paren;
2244     int		b_ind_paren_prev;
2245     int		b_ind_maxparen;
2246     int		b_ind_maxcomment;
2247     int		b_ind_scopedecl;
2248     int		b_ind_scopedecl_code;
2249     int		b_ind_java;
2250     int		b_ind_js;
2251     int		b_ind_keep_case_label;
2252     int		b_ind_hash_comment;
2253     int		b_ind_cpp_namespace;
2254     int		b_ind_if_for_while;
2255     int		b_ind_cpp_extern_c;
2256 #endif
2257 
2258     linenr_T	b_no_eol_lnum;	/* non-zero lnum when last line of next binary
2259 				 * write should not have an end-of-line */
2260 
2261     int		b_start_eol;	/* last line had eol when it was read */
2262     int		b_start_ffc;	/* first char of 'ff' when edit started */
2263 #ifdef FEAT_MBYTE
2264     char_u	*b_start_fenc;	/* 'fileencoding' when edit started or NULL */
2265     int		b_bad_char;	/* "++bad=" argument when edit started or 0 */
2266     int		b_start_bomb;	/* 'bomb' when it was read */
2267 #endif
2268 
2269 #ifdef FEAT_EVAL
2270     dictitem_T	b_bufvar;	/* variable for "b:" Dictionary */
2271     dict_T	*b_vars;	/* internal variables, local to buffer */
2272 #endif
2273 
2274 #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
2275     char_u	*b_p_bexpr;	/* 'balloonexpr' local value */
2276     long_u	b_p_bexpr_flags;/* flags for 'balloonexpr' */
2277 #endif
2278 #ifdef FEAT_CRYPT
2279     char_u	*b_p_cm;	/* 'cryptmethod' */
2280 #endif
2281 
2282     /* When a buffer is created, it starts without a swap file.  b_may_swap is
2283      * then set to indicate that a swap file may be opened later.  It is reset
2284      * if a swap file could not be opened.
2285      */
2286     int		b_may_swap;
2287     int		b_did_warn;	/* Set to 1 if user has been warned on first
2288 				   change of a read-only file */
2289 
2290     /* Two special kinds of buffers:
2291      * help buffer  - used for help files, won't use a swap file.
2292      * spell buffer - used for spell info, never displayed and doesn't have a
2293      *		      file name.
2294      */
2295     int		b_help;		/* TRUE for help file buffer (when set b_p_bt
2296 				   is "help") */
2297 #ifdef FEAT_SPELL
2298     int		b_spell;	/* TRUE for a spell file buffer, most fields
2299 				   are not used!  Use the B_SPELL macro to
2300 				   access b_spell without #ifdef. */
2301 #endif
2302 
2303     int		b_shortname;	/* this file has an 8.3 file name */
2304 
2305 #ifdef FEAT_MZSCHEME
2306     void	*b_mzscheme_ref; /* The MzScheme reference to this buffer */
2307 #endif
2308 
2309 #ifdef FEAT_PERL
2310     void	*b_perl_private;
2311 #endif
2312 
2313 #ifdef FEAT_PYTHON
2314     void	*b_python_ref;	/* The Python reference to this buffer */
2315 #endif
2316 
2317 #ifdef FEAT_PYTHON3
2318     void	*b_python3_ref;	/* The Python3 reference to this buffer */
2319 #endif
2320 
2321 #ifdef FEAT_TCL
2322     void	*b_tcl_ref;
2323 #endif
2324 
2325 #ifdef FEAT_RUBY
2326     void	*b_ruby_ref;
2327 #endif
2328 
2329 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
2330     synblock_T	b_s;		/* Info related to syntax highlighting.  w_s
2331 				 * normally points to this, but some windows
2332 				 * may use a different synblock_T. */
2333 #endif
2334 
2335 #ifdef FEAT_SIGNS
2336     signlist_T	*b_signlist;	/* list of signs to draw */
2337 # ifdef FEAT_NETBEANS_INTG
2338     int		b_has_sign_column; /* Flag that is set when a first sign is
2339 				    * added and remains set until the end of
2340 				    * the netbeans session. */
2341 # endif
2342 #endif
2343 
2344 #ifdef FEAT_NETBEANS_INTG
2345     int		b_netbeans_file;    /* TRUE when buffer is owned by NetBeans */
2346     int		b_was_netbeans_file;/* TRUE if b_netbeans_file was once set */
2347 #endif
2348 #ifdef FEAT_JOB_CHANNEL
2349     int		b_write_to_channel; /* TRUE when appended lines are written to
2350 				     * a channel. */
2351 #endif
2352 
2353 #ifdef FEAT_CRYPT
2354     cryptstate_T *b_cryptstate;	/* Encryption state while reading or writing
2355 				 * the file. NULL when not using encryption. */
2356 #endif
2357     int		b_mapped_ctrl_c; /* modes where CTRL-C is mapped */
2358 
2359 #ifdef FEAT_TERMINAL
2360     term_T	*b_term;	/* When not NULL this buffer is for a terminal
2361 				 * window. */
2362 #endif
2363 
2364 }; /* file_buffer */
2365 
2366 
2367 #ifdef FEAT_DIFF
2368 /*
2369  * Stuff for diff mode.
2370  */
2371 # define DB_COUNT 8	/* up to eight buffers can be diff'ed */
2372 
2373 /*
2374  * Each diffblock defines where a block of lines starts in each of the buffers
2375  * and how many lines it occupies in that buffer.  When the lines are missing
2376  * in the buffer the df_count[] is zero.  This is all counted in
2377  * buffer lines.
2378  * There is always at least one unchanged line in between the diffs.
2379  * Otherwise it would have been included in the diff above or below it.
2380  * df_lnum[] + df_count[] is the lnum below the change.  When in one buffer
2381  * lines have been inserted, in the other buffer df_lnum[] is the line below
2382  * the insertion and df_count[] is zero.  When appending lines at the end of
2383  * the buffer, df_lnum[] is one beyond the end!
2384  * This is using a linked list, because the number of differences is expected
2385  * to be reasonable small.  The list is sorted on lnum.
2386  */
2387 typedef struct diffblock_S diff_T;
2388 struct diffblock_S
2389 {
2390     diff_T	*df_next;
2391     linenr_T	df_lnum[DB_COUNT];	/* line number in buffer */
2392     linenr_T	df_count[DB_COUNT];	/* nr of inserted/changed lines */
2393 };
2394 #endif
2395 
2396 #define SNAP_HELP_IDX	0
2397 #ifdef FEAT_AUTOCMD
2398 # define SNAP_AUCMD_IDX 1
2399 # define SNAP_COUNT	2
2400 #else
2401 # define SNAP_COUNT	1
2402 #endif
2403 
2404 /*
2405  * Tab pages point to the top frame of each tab page.
2406  * Note: Most values are NOT valid for the current tab page!  Use "curwin",
2407  * "firstwin", etc. for that.  "tp_topframe" is always valid and can be
2408  * compared against "topframe" to find the current tab page.
2409  */
2410 typedef struct tabpage_S tabpage_T;
2411 struct tabpage_S
2412 {
2413     tabpage_T	    *tp_next;	    /* next tabpage or NULL */
2414     frame_T	    *tp_topframe;   /* topframe for the windows */
2415     win_T	    *tp_curwin;	    /* current window in this Tab page */
2416     win_T	    *tp_prevwin;    /* previous window in this Tab page */
2417     win_T	    *tp_firstwin;   /* first window in this Tab page */
2418     win_T	    *tp_lastwin;    /* last window in this Tab page */
2419     long	    tp_old_Rows;    /* Rows when Tab page was left */
2420     long	    tp_old_Columns; /* Columns when Tab page was left */
2421     long	    tp_ch_used;	    /* value of 'cmdheight' when frame size
2422 				       was set */
2423 #ifdef FEAT_GUI
2424     int		    tp_prev_which_scrollbars[3];
2425 				    /* previous value of which_scrollbars */
2426 #endif
2427 #ifdef FEAT_DIFF
2428     diff_T	    *tp_first_diff;
2429     buf_T	    *(tp_diffbuf[DB_COUNT]);
2430     int		    tp_diff_invalid;	/* list of diffs is outdated */
2431 #endif
2432     frame_T	    *(tp_snapshot[SNAP_COUNT]);  /* window layout snapshots */
2433 #ifdef FEAT_EVAL
2434     dictitem_T	    tp_winvar;	    /* variable for "t:" Dictionary */
2435     dict_T	    *tp_vars;	    /* internal variables, local to tab page */
2436 #endif
2437 
2438 #ifdef FEAT_PYTHON
2439     void	    *tp_python_ref;	/* The Python value for this tab page */
2440 #endif
2441 
2442 #ifdef FEAT_PYTHON3
2443     void	    *tp_python3_ref;	/* The Python value for this tab page */
2444 #endif
2445 };
2446 
2447 /*
2448  * Structure to cache info for displayed lines in w_lines[].
2449  * Each logical line has one entry.
2450  * The entry tells how the logical line is currently displayed in the window.
2451  * This is updated when displaying the window.
2452  * When the display is changed (e.g., when clearing the screen) w_lines_valid
2453  * is changed to exclude invalid entries.
2454  * When making changes to the buffer, wl_valid is reset to indicate wl_size
2455  * may not reflect what is actually in the buffer.  When wl_valid is FALSE,
2456  * the entries can only be used to count the number of displayed lines used.
2457  * wl_lnum and wl_lastlnum are invalid too.
2458  */
2459 typedef struct w_line
2460 {
2461     linenr_T	wl_lnum;	/* buffer line number for logical line */
2462     short_u	wl_size;	/* height in screen lines */
2463     char	wl_valid;	/* TRUE values are valid for text in buffer */
2464 #ifdef FEAT_FOLDING
2465     char	wl_folded;	/* TRUE when this is a range of folded lines */
2466     linenr_T	wl_lastlnum;	/* last buffer line number for logical line */
2467 #endif
2468 } wline_T;
2469 
2470 /*
2471  * Windows are kept in a tree of frames.  Each frame has a column (FR_COL)
2472  * or row (FR_ROW) layout or is a leaf, which has a window.
2473  */
2474 struct frame_S
2475 {
2476     char	fr_layout;	/* FR_LEAF, FR_COL or FR_ROW */
2477 #ifdef FEAT_WINDOWS
2478     int		fr_width;
2479     int		fr_newwidth;	/* new width used in win_equal_rec() */
2480 #endif
2481     int		fr_height;
2482     int		fr_newheight;	/* new height used in win_equal_rec() */
2483     frame_T	*fr_parent;	/* containing frame or NULL */
2484     frame_T	*fr_next;	/* frame right or below in same parent, NULL
2485 				   for first */
2486     frame_T	*fr_prev;	/* frame left or above in same parent, NULL
2487 				   for last */
2488     /* fr_child and fr_win are mutually exclusive */
2489     frame_T	*fr_child;	/* first contained frame */
2490     win_T	*fr_win;	/* window that fills this frame */
2491 };
2492 
2493 #define FR_LEAF	0	/* frame is a leaf */
2494 #define FR_ROW	1	/* frame with a row of windows */
2495 #define FR_COL	2	/* frame with a column of windows */
2496 
2497 /*
2498  * Struct used for highlighting 'hlsearch' matches, matches defined by
2499  * ":match" and matches defined by match functions.
2500  * For 'hlsearch' there is one pattern for all windows.  For ":match" and the
2501  * match functions there is a different pattern for each window.
2502  */
2503 typedef struct
2504 {
2505     regmmatch_T	rm;	/* points to the regexp program; contains last found
2506 			   match (may continue in next line) */
2507     buf_T	*buf;	/* the buffer to search for a match */
2508     linenr_T	lnum;	/* the line to search for a match */
2509     int		attr;	/* attributes to be used for a match */
2510     int		attr_cur; /* attributes currently active in win_line() */
2511     linenr_T	first_lnum;	/* first lnum to search for multi-line pat */
2512     colnr_T	startcol; /* in win_line() points to char where HL starts */
2513     colnr_T	endcol;	 /* in win_line() points to char where HL ends */
2514     int		is_addpos;	/* position specified directly by
2515 				   matchaddpos(). TRUE/FALSE */
2516 #ifdef FEAT_RELTIME
2517     proftime_T	tm;	/* for a time limit */
2518 #endif
2519 } match_T;
2520 
2521 /* number of positions supported by matchaddpos() */
2522 #define MAXPOSMATCH 8
2523 
2524 /*
2525  * Same as lpos_T, but with additional field len.
2526  */
2527 typedef struct
2528 {
2529     linenr_T	lnum;	/* line number */
2530     colnr_T	col;	/* column number */
2531     int		len;	/* length: 0 - to the end of line */
2532 } llpos_T;
2533 
2534 /*
2535  * posmatch_T provides an array for storing match items for matchaddpos()
2536  * function.
2537  */
2538 typedef struct posmatch posmatch_T;
2539 struct posmatch
2540 {
2541     llpos_T	pos[MAXPOSMATCH];	/* array of positions */
2542     int		cur;			/* internal position counter */
2543     linenr_T	toplnum;		/* top buffer line */
2544     linenr_T	botlnum;		/* bottom buffer line */
2545 };
2546 
2547 /*
2548  * matchitem_T provides a linked list for storing match items for ":match" and
2549  * the match functions.
2550  */
2551 typedef struct matchitem matchitem_T;
2552 struct matchitem
2553 {
2554     matchitem_T	*next;
2555     int		id;	    /* match ID */
2556     int		priority;   /* match priority */
2557     char_u	*pattern;   /* pattern to highlight */
2558     int		hlg_id;	    /* highlight group ID */
2559     regmmatch_T	match;	    /* regexp program for pattern */
2560     posmatch_T	pos;	    /* position matches */
2561     match_T	hl;	    /* struct for doing the actual highlighting */
2562 #ifdef FEAT_CONCEAL
2563     int		conceal_char; /* cchar for Conceal highlighting */
2564 #endif
2565 };
2566 
2567 /*
2568  * Structure which contains all information that belongs to a window
2569  *
2570  * All row numbers are relative to the start of the window, except w_winrow.
2571  */
2572 struct window_S
2573 {
2574     int		w_id;		    /* unique window ID */
2575 
2576     buf_T	*w_buffer;	    /* buffer we are a window into (used
2577 				       often, keep it the first item!) */
2578 
2579 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
2580     synblock_T	*w_s;		    /* for :ownsyntax */
2581 #endif
2582 
2583 #ifdef FEAT_WINDOWS
2584     win_T	*w_prev;	    /* link to previous window */
2585     win_T	*w_next;	    /* link to next window */
2586 #endif
2587 #ifdef FEAT_AUTOCMD
2588     int		w_closing;	    /* window is being closed, don't let
2589 				       autocommands close it too. */
2590 #endif
2591 
2592     frame_T	*w_frame;	    /* frame containing this window */
2593 
2594     pos_T	w_cursor;	    /* cursor position in buffer */
2595 
2596     colnr_T	w_curswant;	    /* The column we'd like to be at.  This is
2597 				       used to try to stay in the same column
2598 				       for up/down cursor motions. */
2599 
2600     int		w_set_curswant;	    /* If set, then update w_curswant the next
2601 				       time through cursupdate() to the
2602 				       current virtual column */
2603 
2604     /*
2605      * the next seven are used to update the visual part
2606      */
2607     char	w_old_visual_mode;  /* last known VIsual_mode */
2608     linenr_T	w_old_cursor_lnum;  /* last known end of visual part */
2609     colnr_T	w_old_cursor_fcol;  /* first column for block visual part */
2610     colnr_T	w_old_cursor_lcol;  /* last column for block visual part */
2611     linenr_T	w_old_visual_lnum;  /* last known start of visual part */
2612     colnr_T	w_old_visual_col;   /* last known start of visual part */
2613     colnr_T	w_old_curswant;	    /* last known value of Curswant */
2614 
2615     /*
2616      * "w_topline", "w_leftcol" and "w_skipcol" specify the offsets for
2617      * displaying the buffer.
2618      */
2619     linenr_T	w_topline;	    /* buffer line number of the line at the
2620 				       top of the window */
2621 #ifdef FEAT_AUTOCMD
2622     char	w_topline_was_set;  /* flag set to TRUE when topline is set,
2623 				       e.g. by winrestview() */
2624 #endif
2625 #ifdef FEAT_DIFF
2626     int		w_topfill;	    /* number of filler lines above w_topline */
2627     int		w_old_topfill;	    /* w_topfill at last redraw */
2628     int		w_botfill;	    /* TRUE when filler lines are actually
2629 				       below w_topline (at end of file) */
2630     int		w_old_botfill;	    /* w_botfill at last redraw */
2631 #endif
2632     colnr_T	w_leftcol;	    /* window column number of the left most
2633 				       character in the window; used when
2634 				       'wrap' is off */
2635     colnr_T	w_skipcol;	    /* starting column when a single line
2636 				       doesn't fit in the window */
2637 
2638     /*
2639      * Layout of the window in the screen.
2640      * May need to add "msg_scrolled" to "w_winrow" in rare situations.
2641      */
2642 #ifdef FEAT_WINDOWS
2643     int		w_winrow;	    /* first row of window in screen */
2644 #endif
2645     int		w_height;	    /* number of rows in window, excluding
2646 				       status/command line(s) */
2647 #ifdef FEAT_WINDOWS
2648     int		w_status_height;    /* number of status lines (0 or 1) */
2649     int		w_wincol;	    /* Leftmost column of window in screen.
2650 				       use W_WINCOL() */
2651     int		w_width;	    /* Width of window, excluding separation.
2652 				       use W_WIDTH() */
2653     int		w_vsep_width;	    /* Number of separator columns (0 or 1).
2654 				       use W_VSEP_WIDTH() */
2655 #endif
2656 
2657     /*
2658      * === start of cached values ====
2659      */
2660     /*
2661      * Recomputing is minimized by storing the result of computations.
2662      * Use functions in screen.c to check if they are valid and to update.
2663      * w_valid is a bitfield of flags, which indicate if specific values are
2664      * valid or need to be recomputed.	See screen.c for values.
2665      */
2666     int		w_valid;
2667     pos_T	w_valid_cursor;	    /* last known position of w_cursor, used
2668 				       to adjust w_valid */
2669     colnr_T	w_valid_leftcol;    /* last known w_leftcol */
2670 
2671     /*
2672      * w_cline_height is the number of physical lines taken by the buffer line
2673      * that the cursor is on.  We use this to avoid extra calls to plines().
2674      */
2675     int		w_cline_height;	    /* current size of cursor line */
2676 #ifdef FEAT_FOLDING
2677     int		w_cline_folded;	    /* cursor line is folded */
2678 #endif
2679 
2680     int		w_cline_row;	    /* starting row of the cursor line */
2681 
2682     colnr_T	w_virtcol;	    /* column number of the cursor in the
2683 				       buffer line, as opposed to the column
2684 				       number we're at on the screen.  This
2685 				       makes a difference on lines which span
2686 				       more than one screen line or when
2687 				       w_leftcol is non-zero */
2688 
2689     /*
2690      * w_wrow and w_wcol specify the cursor position in the window.
2691      * This is related to positions in the window, not in the display or
2692      * buffer, thus w_wrow is relative to w_winrow.
2693      */
2694     int		w_wrow, w_wcol;	    /* cursor position in window */
2695 
2696     linenr_T	w_botline;	    /* number of the line below the bottom of
2697 				       the window */
2698     int		w_empty_rows;	    /* number of ~ rows in window */
2699 #ifdef FEAT_DIFF
2700     int		w_filler_rows;	    /* number of filler rows at the end of the
2701 				       window */
2702 #endif
2703 
2704     /*
2705      * Info about the lines currently in the window is remembered to avoid
2706      * recomputing it every time.  The allocated size of w_lines[] is Rows.
2707      * Only the w_lines_valid entries are actually valid.
2708      * When the display is up-to-date w_lines[0].wl_lnum is equal to w_topline
2709      * and w_lines[w_lines_valid - 1].wl_lnum is equal to w_botline.
2710      * Between changing text and updating the display w_lines[] represents
2711      * what is currently displayed.  wl_valid is reset to indicated this.
2712      * This is used for efficient redrawing.
2713      */
2714     int		w_lines_valid;	    /* number of valid entries */
2715     wline_T	*w_lines;
2716 
2717 #ifdef FEAT_FOLDING
2718     garray_T	w_folds;	    /* array of nested folds */
2719     char	w_fold_manual;	    /* when TRUE: some folds are opened/closed
2720 				       manually */
2721     char	w_foldinvalid;	    /* when TRUE: folding needs to be
2722 				       recomputed */
2723 #endif
2724 #ifdef FEAT_LINEBREAK
2725     int		w_nrwidth;	    /* width of 'number' and 'relativenumber'
2726 				       column being used */
2727 #endif
2728 
2729     /*
2730      * === end of cached values ===
2731      */
2732 
2733     int		w_redr_type;	    /* type of redraw to be performed on win */
2734     int		w_upd_rows;	    /* number of window lines to update when
2735 				       w_redr_type is REDRAW_TOP */
2736     linenr_T	w_redraw_top;	    /* when != 0: first line needing redraw */
2737     linenr_T	w_redraw_bot;	    /* when != 0: last line needing redraw */
2738 #ifdef FEAT_WINDOWS
2739     int		w_redr_status;	    /* if TRUE status line must be redrawn */
2740 #endif
2741 
2742 #ifdef FEAT_CMDL_INFO
2743     /* remember what is shown in the ruler for this window (if 'ruler' set) */
2744     pos_T	w_ru_cursor;	    /* cursor position shown in ruler */
2745     colnr_T	w_ru_virtcol;	    /* virtcol shown in ruler */
2746     linenr_T	w_ru_topline;	    /* topline shown in ruler */
2747     linenr_T	w_ru_line_count;    /* line count used for ruler */
2748 # ifdef FEAT_DIFF
2749     int		w_ru_topfill;	    /* topfill shown in ruler */
2750 # endif
2751     char	w_ru_empty;	    /* TRUE if ruler shows 0-1 (empty line) */
2752 #endif
2753 
2754     int		w_alt_fnum;	    /* alternate file (for # and CTRL-^) */
2755 
2756 #ifdef FEAT_WINDOWS
2757     alist_T	*w_alist;	    /* pointer to arglist for this window */
2758 #endif
2759     int		w_arg_idx;	    /* current index in argument list (can be
2760 				       out of range!) */
2761     int		w_arg_idx_invalid;  /* editing another file than w_arg_idx */
2762 
2763     char_u	*w_localdir;	    /* absolute path of local directory or
2764 				       NULL */
2765     /*
2766      * Options local to a window.
2767      * They are local because they influence the layout of the window or
2768      * depend on the window layout.
2769      * There are two values: w_onebuf_opt is local to the buffer currently in
2770      * this window, w_allbuf_opt is for all buffers in this window.
2771      */
2772     winopt_T	w_onebuf_opt;
2773     winopt_T	w_allbuf_opt;
2774 
2775     /* A few options have local flags for P_INSECURE. */
2776 #ifdef FEAT_STL_OPT
2777     long_u	w_p_stl_flags;	    /* flags for 'statusline' */
2778 #endif
2779 #ifdef FEAT_EVAL
2780     long_u	w_p_fde_flags;	    /* flags for 'foldexpr' */
2781     long_u	w_p_fdt_flags;	    /* flags for 'foldtext' */
2782 #endif
2783 #ifdef FEAT_SYN_HL
2784     int		*w_p_cc_cols;	    /* array of columns to highlight or NULL */
2785 #endif
2786 #ifdef FEAT_LINEBREAK
2787     int		w_p_brimin;	    /* minimum width for breakindent */
2788     int		w_p_brishift;	    /* additional shift for breakindent */
2789     int		w_p_brisbr;	    /* sbr in 'briopt' */
2790 #endif
2791 
2792     /* transform a pointer to a "onebuf" option into a "allbuf" option */
2793 #define GLOBAL_WO(p)	((char *)p + sizeof(winopt_T))
2794 
2795 #ifdef FEAT_SCROLLBIND
2796     long	w_scbind_pos;
2797 #endif
2798 
2799 #ifdef FEAT_EVAL
2800     dictitem_T	w_winvar;	/* variable for "w:" Dictionary */
2801     dict_T	*w_vars;	/* internal variables, local to window */
2802 #endif
2803 
2804 #if defined(FEAT_RIGHTLEFT) && defined(FEAT_FKMAP)
2805     int		w_farsi;	/* for the window dependent Farsi functions */
2806 #endif
2807 
2808     /*
2809      * The w_prev_pcmark field is used to check whether we really did jump to
2810      * a new line after setting the w_pcmark.  If not, then we revert to
2811      * using the previous w_pcmark.
2812      */
2813     pos_T	w_pcmark;	/* previous context mark */
2814     pos_T	w_prev_pcmark;	/* previous w_pcmark */
2815 
2816 #ifdef FEAT_JUMPLIST
2817     /*
2818      * the jumplist contains old cursor positions
2819      */
2820     xfmark_T	w_jumplist[JUMPLISTSIZE];
2821     int		w_jumplistlen;		/* number of active entries */
2822     int		w_jumplistidx;		/* current position */
2823 
2824     int		w_changelistidx;	/* current position in b_changelist */
2825 #endif
2826 
2827 #ifdef FEAT_SEARCH_EXTRA
2828     matchitem_T	*w_match_head;		/* head of match list */
2829     int		w_next_match_id;	/* next match ID */
2830 #endif
2831 
2832     /*
2833      * the tagstack grows from 0 upwards:
2834      * entry 0: older
2835      * entry 1: newer
2836      * entry 2: newest
2837      */
2838     taggy_T	w_tagstack[TAGSTACKSIZE];	/* the tag stack */
2839     int		w_tagstackidx;		/* idx just below active entry */
2840     int		w_tagstacklen;		/* number of tags on stack */
2841 
2842     /*
2843      * w_fraction is the fractional row of the cursor within the window, from
2844      * 0 at the top row to FRACTION_MULT at the last row.
2845      * w_prev_fraction_row was the actual cursor row when w_fraction was last
2846      * calculated.
2847      */
2848     int		w_fraction;
2849     int		w_prev_fraction_row;
2850 
2851 #ifdef FEAT_GUI
2852     scrollbar_T	w_scrollbars[2];	/* vert. Scrollbars for this window */
2853 #endif
2854 #ifdef FEAT_LINEBREAK
2855     linenr_T	w_nrwidth_line_count;	/* line count when ml_nrwidth_width
2856 					 * was computed. */
2857     long	w_nuw_cached;		/* 'numberwidth' option cached */
2858     int		w_nrwidth_width;	/* nr of chars to print line count. */
2859 #endif
2860 
2861 #ifdef FEAT_QUICKFIX
2862     qf_info_T	*w_llist;		/* Location list for this window */
2863     /*
2864      * Location list reference used in the location list window.
2865      * In a non-location list window, w_llist_ref is NULL.
2866      */
2867     qf_info_T	*w_llist_ref;
2868 #endif
2869 
2870 
2871 #ifdef FEAT_MZSCHEME
2872     void	*w_mzscheme_ref;	/* The MzScheme value for this window */
2873 #endif
2874 
2875 #ifdef FEAT_PERL
2876     void	*w_perl_private;
2877 #endif
2878 
2879 #ifdef FEAT_PYTHON
2880     void	*w_python_ref;		/* The Python value for this window */
2881 #endif
2882 
2883 #ifdef FEAT_PYTHON3
2884     void	*w_python3_ref;		/* The Python value for this window */
2885 #endif
2886 
2887 #ifdef FEAT_TCL
2888     void	*w_tcl_ref;
2889 #endif
2890 
2891 #ifdef FEAT_RUBY
2892     void	*w_ruby_ref;
2893 #endif
2894 };
2895 
2896 /*
2897  * Arguments for operators.
2898  */
2899 typedef struct oparg_S
2900 {
2901     int		op_type;	/* current pending operator type */
2902     int		regname;	/* register to use for the operator */
2903     int		motion_type;	/* type of the current cursor motion */
2904     int		motion_force;	/* force motion type: 'v', 'V' or CTRL-V */
2905     int		use_reg_one;	/* TRUE if delete uses reg 1 even when not
2906 				   linewise */
2907     int		inclusive;	/* TRUE if char motion is inclusive (only
2908 				   valid when motion_type is MCHAR */
2909     int		end_adjusted;	/* backuped b_op_end one char (only used by
2910 				   do_format()) */
2911     pos_T	start;		/* start of the operator */
2912     pos_T	end;		/* end of the operator */
2913     pos_T	cursor_start;	/* cursor position before motion for "gw" */
2914 
2915     long	line_count;	/* number of lines from op_start to op_end
2916 				   (inclusive) */
2917     int		empty;		/* op_start and op_end the same (only used by
2918 				   do_change()) */
2919     int		is_VIsual;	/* operator on Visual area */
2920     int		block_mode;	/* current operator is Visual block mode */
2921     colnr_T	start_vcol;	/* start col for block mode operator */
2922     colnr_T	end_vcol;	/* end col for block mode operator */
2923 #ifdef FEAT_AUTOCMD
2924     long	prev_opcount;	/* ca.opcount saved for K_CURSORHOLD */
2925     long	prev_count0;	/* ca.count0 saved for K_CURSORHOLD */
2926 #endif
2927 } oparg_T;
2928 
2929 /*
2930  * Arguments for Normal mode commands.
2931  */
2932 typedef struct cmdarg_S
2933 {
2934     oparg_T	*oap;		/* Operator arguments */
2935     int		prechar;	/* prefix character (optional, always 'g') */
2936     int		cmdchar;	/* command character */
2937     int		nchar;		/* next command character (optional) */
2938 #ifdef FEAT_MBYTE
2939     int		ncharC1;	/* first composing character (optional) */
2940     int		ncharC2;	/* second composing character (optional) */
2941 #endif
2942     int		extra_char;	/* yet another character (optional) */
2943     long	opcount;	/* count before an operator */
2944     long	count0;		/* count before command, default 0 */
2945     long	count1;		/* count before command, default 1 */
2946     int		arg;		/* extra argument from nv_cmds[] */
2947     int		retval;		/* return: CA_* values */
2948     char_u	*searchbuf;	/* return: pointer to search pattern or NULL */
2949 } cmdarg_T;
2950 
2951 /* values for retval: */
2952 #define CA_COMMAND_BUSY	    1	/* skip restarting edit() once */
2953 #define CA_NO_ADJ_OP_END    2	/* don't adjust operator end */
2954 
2955 #ifdef CURSOR_SHAPE
2956 /*
2957  * struct to store values from 'guicursor' and 'mouseshape'
2958  */
2959 /* Indexes in shape_table[] */
2960 #define SHAPE_IDX_N	0	/* Normal mode */
2961 #define SHAPE_IDX_V	1	/* Visual mode */
2962 #define SHAPE_IDX_I	2	/* Insert mode */
2963 #define SHAPE_IDX_R	3	/* Replace mode */
2964 #define SHAPE_IDX_C	4	/* Command line Normal mode */
2965 #define SHAPE_IDX_CI	5	/* Command line Insert mode */
2966 #define SHAPE_IDX_CR	6	/* Command line Replace mode */
2967 #define SHAPE_IDX_O	7	/* Operator-pending mode */
2968 #define SHAPE_IDX_VE	8	/* Visual mode with 'selection' exclusive */
2969 #define SHAPE_IDX_CLINE	9	/* On command line */
2970 #define SHAPE_IDX_STATUS 10	/* A status line */
2971 #define SHAPE_IDX_SDRAG 11	/* dragging a status line */
2972 #define SHAPE_IDX_VSEP	12	/* A vertical separator line */
2973 #define SHAPE_IDX_VDRAG 13	/* dragging a vertical separator line */
2974 #define SHAPE_IDX_MORE	14	/* Hit-return or More */
2975 #define SHAPE_IDX_MOREL	15	/* Hit-return or More in last line */
2976 #define SHAPE_IDX_SM	16	/* showing matching paren */
2977 #define SHAPE_IDX_COUNT	17
2978 
2979 #define SHAPE_BLOCK	0	/* block cursor */
2980 #define SHAPE_HOR	1	/* horizontal bar cursor */
2981 #define SHAPE_VER	2	/* vertical bar cursor */
2982 
2983 #define MSHAPE_NUMBERED	1000	/* offset for shapes identified by number */
2984 #define MSHAPE_HIDE	1	/* hide mouse pointer */
2985 
2986 #define SHAPE_MOUSE	1	/* used for mouse pointer shape */
2987 #define SHAPE_CURSOR	2	/* used for text cursor shape */
2988 
2989 typedef struct cursor_entry
2990 {
2991     int		shape;		/* one of the SHAPE_ defines */
2992     int		mshape;		/* one of the MSHAPE defines */
2993     int		percentage;	/* percentage of cell for bar */
2994     long	blinkwait;	/* blinking, wait time before blinking starts */
2995     long	blinkon;	/* blinking, on time */
2996     long	blinkoff;	/* blinking, off time */
2997     int		id;		/* highlight group ID */
2998     int		id_lm;		/* highlight group ID for :lmap mode */
2999     char	*name;		/* mode name (fixed) */
3000     char	used_for;	/* SHAPE_MOUSE and/or SHAPE_CURSOR */
3001 } cursorentry_T;
3002 #endif /* CURSOR_SHAPE */
3003 
3004 #ifdef FEAT_MENU
3005 
3006 /* Indices into vimmenu_T->strings[] and vimmenu_T->noremap[] for each mode */
3007 #define MENU_INDEX_INVALID	-1
3008 #define MENU_INDEX_NORMAL	0
3009 #define MENU_INDEX_VISUAL	1
3010 #define MENU_INDEX_SELECT	2
3011 #define MENU_INDEX_OP_PENDING	3
3012 #define MENU_INDEX_INSERT	4
3013 #define MENU_INDEX_CMDLINE	5
3014 #define MENU_INDEX_TIP		6
3015 #define MENU_MODES		7
3016 
3017 /* Menu modes */
3018 #define MENU_NORMAL_MODE	(1 << MENU_INDEX_NORMAL)
3019 #define MENU_VISUAL_MODE	(1 << MENU_INDEX_VISUAL)
3020 #define MENU_SELECT_MODE	(1 << MENU_INDEX_SELECT)
3021 #define MENU_OP_PENDING_MODE	(1 << MENU_INDEX_OP_PENDING)
3022 #define MENU_INSERT_MODE	(1 << MENU_INDEX_INSERT)
3023 #define MENU_CMDLINE_MODE	(1 << MENU_INDEX_CMDLINE)
3024 #define MENU_TIP_MODE		(1 << MENU_INDEX_TIP)
3025 #define MENU_ALL_MODES		((1 << MENU_INDEX_TIP) - 1)
3026 /*note MENU_INDEX_TIP is not a 'real' mode*/
3027 
3028 /* Start a menu name with this to not include it on the main menu bar */
3029 #define MNU_HIDDEN_CHAR		']'
3030 
3031 typedef struct VimMenu vimmenu_T;
3032 
3033 struct VimMenu
3034 {
3035     int		modes;		    /* Which modes is this menu visible for? */
3036     int		enabled;	    /* for which modes the menu is enabled */
3037     char_u	*name;		    /* Name of menu, possibly translated */
3038     char_u	*dname;		    /* Displayed Name ("name" without '&') */
3039 #ifdef FEAT_MULTI_LANG
3040     char_u	*en_name;	    /* "name" untranslated, NULL when "name"
3041 				     * was not translated */
3042     char_u	*en_dname;	    /* "dname" untranslated, NULL when "dname"
3043 				     * was not translated */
3044 #endif
3045     int		mnemonic;	    /* mnemonic key (after '&') */
3046     char_u	*actext;	    /* accelerator text (after TAB) */
3047     int		priority;	    /* Menu order priority */
3048 #ifdef FEAT_GUI
3049     void	(*cb)(vimmenu_T *);	    /* Call-back routine */
3050 #endif
3051 #ifdef FEAT_TOOLBAR
3052     char_u	*iconfile;	    /* name of file for icon or NULL */
3053     int		iconidx;	    /* icon index (-1 if not set) */
3054     int		icon_builtin;	    /* icon names is BuiltIn{nr} */
3055 #endif
3056     char_u	*strings[MENU_MODES]; /* Mapped string for each mode */
3057     int		noremap[MENU_MODES]; /* A REMAP_ flag for each mode */
3058     char	silent[MENU_MODES]; /* A silent flag for each mode */
3059     vimmenu_T	*children;	    /* Children of sub-menu */
3060     vimmenu_T	*parent;	    /* Parent of menu */
3061     vimmenu_T	*next;		    /* Next item in menu */
3062 #ifdef FEAT_GUI_X11
3063     Widget	id;		    /* Manage this to enable item */
3064     Widget	submenu_id;	    /* If this is submenu, add children here */
3065 #endif
3066 #ifdef FEAT_GUI_GTK
3067     GtkWidget	*id;		    /* Manage this to enable item */
3068     GtkWidget	*submenu_id;	    /* If this is submenu, add children here */
3069 # if defined(GTK_CHECK_VERSION) && !GTK_CHECK_VERSION(3,4,0)
3070     GtkWidget	*tearoff_handle;
3071 # endif
3072     GtkWidget   *label;		    /* Used by "set wak=" code. */
3073 #endif
3074 #ifdef FEAT_GUI_MOTIF
3075     int		sensitive;	    /* turn button on/off */
3076     char	**xpm;		    /* pixmap data */
3077     char	*xpm_fname;	    /* file with pixmap data */
3078 #endif
3079 #ifdef FEAT_GUI_ATHENA
3080     Pixmap	image;		    /* Toolbar image */
3081 #endif
3082 #ifdef FEAT_BEVAL_TIP
3083     BalloonEval *tip;		    /* tooltip for this menu item */
3084 #endif
3085 #ifdef FEAT_GUI_W32
3086     UINT	id;		    /* Id of menu item */
3087     HMENU	submenu_id;	    /* If this is submenu, add children here */
3088     HWND	tearoff_handle;	    /* hWnd of tearoff if created */
3089 #endif
3090 #ifdef FEAT_GUI_MAC
3091 /*  MenuHandle	id; */
3092 /*  short	index;	*/	    /* the item index within the father menu */
3093     short	menu_id;	    /* the menu id to which this item belong */
3094     short	submenu_id;	    /* the menu id of the children (could be
3095 				       get through some tricks) */
3096     MenuHandle	menu_handle;
3097     MenuHandle	submenu_handle;
3098 #endif
3099 #ifdef FEAT_GUI_PHOTON
3100     PtWidget_t	*id;
3101     PtWidget_t	*submenu_id;
3102 #endif
3103 };
3104 #else
3105 /* For generating prototypes when FEAT_MENU isn't defined. */
3106 typedef int vimmenu_T;
3107 
3108 #endif /* FEAT_MENU */
3109 
3110 /*
3111  * Struct to save values in before executing autocommands for a buffer that is
3112  * not the current buffer.  Without FEAT_AUTOCMD only "curbuf" is remembered.
3113  */
3114 typedef struct
3115 {
3116     buf_T	*save_curbuf;	/* saved curbuf */
3117 #ifdef FEAT_AUTOCMD
3118     int		use_aucmd_win;	/* using aucmd_win */
3119     win_T	*save_curwin;	/* saved curwin */
3120     win_T	*new_curwin;	/* new curwin */
3121     bufref_T	new_curbuf;	/* new curbuf */
3122     char_u	*globaldir;	/* saved value of globaldir */
3123 #endif
3124 } aco_save_T;
3125 
3126 /*
3127  * Generic option table item, only used for printer at the moment.
3128  */
3129 typedef struct
3130 {
3131     const char	*name;
3132     int		hasnum;
3133     long	number;
3134     char_u	*string;	/* points into option string */
3135     int		strlen;
3136     int		present;
3137 } option_table_T;
3138 
3139 /*
3140  * Structure to hold printing color and font attributes.
3141  */
3142 typedef struct
3143 {
3144     long_u	fg_color;
3145     long_u	bg_color;
3146     int		bold;
3147     int		italic;
3148     int		underline;
3149     int		undercurl;
3150 } prt_text_attr_T;
3151 
3152 /*
3153  * Structure passed back to the generic printer code.
3154  */
3155 typedef struct
3156 {
3157     int		n_collated_copies;
3158     int		n_uncollated_copies;
3159     int		duplex;
3160     int		chars_per_line;
3161     int		lines_per_page;
3162     int		has_color;
3163     prt_text_attr_T number;
3164 #ifdef FEAT_SYN_HL
3165     int		modec;
3166     int		do_syntax;
3167 #endif
3168     int		user_abort;
3169     char_u	*jobname;
3170 #ifdef FEAT_POSTSCRIPT
3171     char_u	*outfile;
3172     char_u	*arguments;
3173 #endif
3174 } prt_settings_T;
3175 
3176 #define PRINT_NUMBER_WIDTH 8
3177 
3178 /*
3179  * Used for popup menu items.
3180  */
3181 typedef struct
3182 {
3183     char_u	*pum_text;	/* main menu text */
3184     char_u	*pum_kind;	/* extra kind text (may be truncated) */
3185     char_u	*pum_extra;	/* extra menu text (may be truncated) */
3186     char_u	*pum_info;	/* extra info */
3187 } pumitem_T;
3188 
3189 /*
3190  * Structure used for get_tagfname().
3191  */
3192 typedef struct
3193 {
3194     char_u	*tn_tags;	/* value of 'tags' when starting */
3195     char_u	*tn_np;		/* current position in tn_tags */
3196     int		tn_did_filefind_init;
3197     int		tn_hf_idx;
3198     void	*tn_search_ctx;
3199 } tagname_T;
3200 
3201 /*
3202  * Array indexes used for cptext argument of ins_compl_add().
3203  */
3204 #define CPT_ABBR    0	/* "abbr" */
3205 #define CPT_MENU    1	/* "menu" */
3206 #define CPT_KIND    2	/* "kind" */
3207 #define CPT_INFO    3	/* "info" */
3208 #define CPT_COUNT   4	/* Number of entries */
3209 
3210 typedef struct {
3211   UINT32_T total[2];
3212   UINT32_T state[8];
3213   char_u   buffer[64];
3214 } context_sha256_T;
3215 
3216 /*
3217  * Structure used for reading in json_decode().
3218  */
3219 struct js_reader
3220 {
3221     char_u	*js_buf;	/* text to be decoded */
3222     char_u	*js_end;	/* NUL in js_buf */
3223     int		js_used;	/* bytes used from js_buf */
3224     int		(*js_fill)(struct js_reader *);
3225 				/* function to fill the buffer or NULL;
3226                                  * return TRUE when the buffer was filled */
3227     void	*js_cookie;	/* can be used by js_fill */
3228     int		js_cookie_arg;	/* can be used by js_fill */
3229 };
3230 typedef struct js_reader js_read_T;
3231 
3232 typedef struct timer_S timer_T;
3233 struct timer_S
3234 {
3235     long	tr_id;
3236 #ifdef FEAT_TIMERS
3237     timer_T	*tr_next;
3238     timer_T	*tr_prev;
3239     proftime_T	tr_due;		    /* when the callback is to be invoked */
3240     char	tr_firing;	    /* when TRUE callback is being called */
3241     char	tr_paused;	    /* when TRUE callback is not invoked */
3242     int		tr_repeat;	    /* number of times to repeat, -1 forever */
3243     long	tr_interval;	    /* msec */
3244     char_u	*tr_callback;	    /* allocated */
3245     partial_T	*tr_partial;
3246 #endif
3247 };
3248 
3249 /* Maximum number of commands from + or -c arguments. */
3250 #define MAX_ARG_CMDS 10
3251 
3252 /* values for "window_layout" */
3253 #define WIN_HOR	    1	    /* "-o" horizontally split windows */
3254 #define	WIN_VER	    2	    /* "-O" vertically split windows */
3255 #define	WIN_TABS    3	    /* "-p" windows on tab pages */
3256 
3257 /* Struct for various parameters passed between main() and other functions. */
3258 typedef struct
3259 {
3260     int		argc;
3261     char	**argv;
3262 
3263     char_u	*fname;			/* first file to edit */
3264 
3265     int		evim_mode;		/* started as "evim" */
3266     char_u	*use_vimrc;		/* vimrc from -u argument */
3267 
3268     int		n_commands;		     /* no. of commands from + or -c */
3269     char_u	*commands[MAX_ARG_CMDS];     /* commands from + or -c arg. */
3270     char_u	cmds_tofree[MAX_ARG_CMDS];   /* commands that need free() */
3271     int		n_pre_commands;		     /* no. of commands from --cmd */
3272     char_u	*pre_commands[MAX_ARG_CMDS]; /* commands from --cmd argument */
3273 
3274     int		edit_type;		/* type of editing to do */
3275     char_u	*tagname;		/* tag from -t argument */
3276 #ifdef FEAT_QUICKFIX
3277     char_u	*use_ef;		/* 'errorfile' from -q argument */
3278 #endif
3279 
3280     int		want_full_screen;
3281     int		not_a_term;		/* no warning for missing term? */
3282     int		tty_fail;		/* exit if not a tty */
3283     char_u	*term;			/* specified terminal name */
3284 #ifdef FEAT_CRYPT
3285     int		ask_for_key;		/* -x argument */
3286 #endif
3287     int		no_swap_file;		/* "-n" argument used */
3288 #ifdef FEAT_EVAL
3289     int		use_debug_break_level;
3290 #endif
3291 #ifdef FEAT_WINDOWS
3292     int		window_count;		/* number of windows to use */
3293     int		window_layout;		/* 0, WIN_HOR, WIN_VER or WIN_TABS */
3294 #endif
3295 
3296 #ifdef FEAT_CLIENTSERVER
3297     int		serverArg;		/* TRUE when argument for a server */
3298     char_u	*serverName_arg;	/* cmdline arg for server name */
3299     char_u	*serverStr;		/* remote server command */
3300     char_u	*serverStrEnc;		/* encoding of serverStr */
3301     char_u	*servername;		/* allocated name for our server */
3302 #endif
3303 #if !defined(UNIX)
3304 # define EXPAND_FILENAMES
3305     int		literal;		/* don't expand file names */
3306 #endif
3307 #ifdef MSWIN
3308     int		full_path;		/* file name argument was full path */
3309 #endif
3310 #ifdef FEAT_DIFF
3311     int		diff_mode;		/* start with 'diff' set */
3312 #endif
3313 } mparm_T;
3314 
3315 /*
3316  * Structure returned by get_lval() and used by set_var_lval().
3317  * For a plain name:
3318  *	"name"	    points to the variable name.
3319  *	"exp_name"  is NULL.
3320  *	"tv"	    is NULL
3321  * For a magic braces name:
3322  *	"name"	    points to the expanded variable name.
3323  *	"exp_name"  is non-NULL, to be freed later.
3324  *	"tv"	    is NULL
3325  * For an index in a list:
3326  *	"name"	    points to the (expanded) variable name.
3327  *	"exp_name"  NULL or non-NULL, to be freed later.
3328  *	"tv"	    points to the (first) list item value
3329  *	"li"	    points to the (first) list item
3330  *	"range", "n1", "n2" and "empty2" indicate what items are used.
3331  * For an existing Dict item:
3332  *	"name"	    points to the (expanded) variable name.
3333  *	"exp_name"  NULL or non-NULL, to be freed later.
3334  *	"tv"	    points to the dict item value
3335  *	"newkey"    is NULL
3336  * For a non-existing Dict item:
3337  *	"name"	    points to the (expanded) variable name.
3338  *	"exp_name"  NULL or non-NULL, to be freed later.
3339  *	"tv"	    points to the Dictionary typval_T
3340  *	"newkey"    is the key for the new item.
3341  */
3342 typedef struct lval_S
3343 {
3344     char_u	*ll_name;	/* start of variable name (can be NULL) */
3345     char_u	*ll_exp_name;	/* NULL or expanded name in allocated memory. */
3346     typval_T	*ll_tv;		/* Typeval of item being used.  If "newkey"
3347 				   isn't NULL it's the Dict to which to add
3348 				   the item. */
3349     listitem_T	*ll_li;		/* The list item or NULL. */
3350     list_T	*ll_list;	/* The list or NULL. */
3351     int		ll_range;	/* TRUE when a [i:j] range was used */
3352     long	ll_n1;		/* First index for list */
3353     long	ll_n2;		/* Second index for list range */
3354     int		ll_empty2;	/* Second index is empty: [i:] */
3355     dict_T	*ll_dict;	/* The Dictionary or NULL */
3356     dictitem_T	*ll_di;		/* The dictitem or NULL */
3357     char_u	*ll_newkey;	/* New key for Dict in alloc. mem or NULL. */
3358 } lval_T;
3359