xref: /vim-8.2.3635/src/structs.h (revision aedfcbe1)
1 /* vi:set ts=8 sts=4 sw=4:
2  *
3  * VIM - Vi IMproved	by Bram Moolenaar
4  *
5  * Do ":help uganda"  in Vim to read copying and usage conditions.
6  * Do ":help credits" in Vim to see a list of people who contributed.
7  */
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 
72 /*
73  * This is here because regexp.h needs pos_T and below regprog_T is used.
74  */
75 #include "regexp.h"
76 
77 /*
78  * This is here because gui.h needs the pos_T and win_T, and win_T needs gui.h
79  * for scrollbar_T.
80  */
81 #ifdef FEAT_GUI
82 # include "gui.h"
83 #else
84 # ifdef FEAT_XCLIPBOARD
85 #  include <X11/Intrinsic.h>
86 # endif
87 # define guicolor_T int		/* avoid error in prototypes */
88 #endif
89 
90 /*
91  * marks: positions in a file
92  * (a normal mark is a lnum/col pair, the same as a file position)
93  */
94 
95 /* (Note: for EBCDIC there are more than 26, because there are gaps in the
96  * alphabet coding.  To minimize changes to the code, I decided to just
97  * increase the number of possible marks. */
98 #define NMARKS		('z' - 'a' + 1)	/* max. # of named marks */
99 #define JUMPLISTSIZE	100		/* max. # of marks in jump list */
100 #define TAGSTACKSIZE	20		/* max. # of tags in tag stack */
101 
102 typedef struct filemark
103 {
104     pos_T	mark;		/* cursor position */
105     int		fnum;		/* file number */
106 } fmark_T;
107 
108 /* Xtended file mark: also has a file name */
109 typedef struct xfilemark
110 {
111     fmark_T	fmark;
112     char_u	*fname;		/* file name, used when fnum == 0 */
113 } xfmark_T;
114 
115 /*
116  * The taggy struct is used to store the information about a :tag command.
117  */
118 typedef struct taggy
119 {
120     char_u	*tagname;	/* tag name */
121     fmark_T	fmark;		/* cursor position BEFORE ":tag" */
122     int		cur_match;	/* match number */
123     int		cur_fnum;	/* buffer number used for cur_match */
124 } taggy_T;
125 
126 /*
127  * Structure that contains all options that are local to a window.
128  * Used twice in a window: for the current buffer and for all buffers.
129  * Also used in wininfo_T.
130  */
131 typedef struct
132 {
133 #ifdef FEAT_ARABIC
134     int		wo_arab;
135 # define w_p_arab w_onebuf_opt.wo_arab	/* 'arabic' */
136 #endif
137 #ifdef FEAT_LINEBREAK
138     int		wo_bri;
139 # define w_p_bri w_onebuf_opt.wo_bri	/* 'breakindent' */
140     char_u	*wo_briopt;
141 # define w_p_briopt w_onebuf_opt.wo_briopt /* 'breakindentopt' */
142 #endif
143 #ifdef FEAT_DIFF
144     int		wo_diff;
145 # define w_p_diff w_onebuf_opt.wo_diff	/* 'diff' */
146 #endif
147 #ifdef FEAT_FOLDING
148     long	wo_fdc;
149 # define w_p_fdc w_onebuf_opt.wo_fdc	/* 'foldcolumn' */
150     int		wo_fdc_save;
151 # define w_p_fdc_save w_onebuf_opt.wo_fdc_save	/* 'foldenable' saved for diff mode */
152     int		wo_fen;
153 # define w_p_fen w_onebuf_opt.wo_fen	/* 'foldenable' */
154     int		wo_fen_save;
155 # define w_p_fen_save w_onebuf_opt.wo_fen_save	/* 'foldenable' saved for diff mode */
156     char_u	*wo_fdi;
157 # define w_p_fdi w_onebuf_opt.wo_fdi	/* 'foldignore' */
158     long	wo_fdl;
159 # define w_p_fdl w_onebuf_opt.wo_fdl	/* 'foldlevel' */
160     int		wo_fdl_save;
161 # define w_p_fdl_save w_onebuf_opt.wo_fdl_save	/* 'foldlevel' state saved for diff mode */
162     char_u	*wo_fdm;
163 # define w_p_fdm w_onebuf_opt.wo_fdm	/* 'foldmethod' */
164     char_u	*wo_fdm_save;
165 # define w_p_fdm_save w_onebuf_opt.wo_fdm_save	/* 'fdm' saved for diff mode */
166     long	wo_fml;
167 # define w_p_fml w_onebuf_opt.wo_fml	/* 'foldminlines' */
168     long	wo_fdn;
169 # define w_p_fdn w_onebuf_opt.wo_fdn	/* 'foldnestmax' */
170 # ifdef FEAT_EVAL
171     char_u	*wo_fde;
172 # define w_p_fde w_onebuf_opt.wo_fde	/* 'foldexpr' */
173     char_u	*wo_fdt;
174 #  define w_p_fdt w_onebuf_opt.wo_fdt	/* 'foldtext' */
175 # endif
176     char_u	*wo_fmr;
177 # define w_p_fmr w_onebuf_opt.wo_fmr	/* 'foldmarker' */
178 #endif
179 #ifdef FEAT_LINEBREAK
180     int		wo_lbr;
181 # define w_p_lbr w_onebuf_opt.wo_lbr	/* 'linebreak' */
182 #endif
183     int		wo_list;
184 #define w_p_list w_onebuf_opt.wo_list	/* 'list' */
185     int		wo_nu;
186 #define w_p_nu w_onebuf_opt.wo_nu	/* 'number' */
187     int		wo_rnu;
188 #define w_p_rnu w_onebuf_opt.wo_rnu	/* 'relativenumber' */
189 #ifdef FEAT_LINEBREAK
190     long	wo_nuw;
191 # define w_p_nuw w_onebuf_opt.wo_nuw	/* 'numberwidth' */
192 #endif
193 #if defined(FEAT_WINDOWS)
194     int		wo_wfh;
195 # define w_p_wfh w_onebuf_opt.wo_wfh	/* 'winfixheight' */
196     int		wo_wfw;
197 # define w_p_wfw w_onebuf_opt.wo_wfw	/* 'winfixwidth' */
198 #endif
199 #if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
200     int		wo_pvw;
201 # define w_p_pvw w_onebuf_opt.wo_pvw	/* 'previewwindow' */
202 #endif
203 #ifdef FEAT_RIGHTLEFT
204     int		wo_rl;
205 # define w_p_rl w_onebuf_opt.wo_rl	/* 'rightleft' */
206     char_u	*wo_rlc;
207 # define w_p_rlc w_onebuf_opt.wo_rlc	/* 'rightleftcmd' */
208 #endif
209     long	wo_scr;
210 #define w_p_scr w_onebuf_opt.wo_scr	/* 'scroll' */
211 #ifdef FEAT_SPELL
212     int		wo_spell;
213 # define w_p_spell w_onebuf_opt.wo_spell /* 'spell' */
214 #endif
215 #ifdef FEAT_SYN_HL
216     int		wo_cuc;
217 # define w_p_cuc w_onebuf_opt.wo_cuc	/* 'cursorcolumn' */
218     int		wo_cul;
219 # define w_p_cul w_onebuf_opt.wo_cul	/* 'cursorline' */
220     char_u	*wo_cc;
221 # define w_p_cc w_onebuf_opt.wo_cc	/* 'colorcolumn' */
222 #endif
223 #ifdef FEAT_STL_OPT
224     char_u	*wo_stl;
225 #define w_p_stl w_onebuf_opt.wo_stl	/* 'statusline' */
226 #endif
227 #ifdef FEAT_SCROLLBIND
228     int		wo_scb;
229 # define w_p_scb w_onebuf_opt.wo_scb	/* 'scrollbind' */
230     int		wo_diff_saved; /* options were saved for starting diff mode */
231 # define w_p_diff_saved w_onebuf_opt.wo_diff_saved
232     int		wo_scb_save;	/* 'scrollbind' saved for diff mode*/
233 # define w_p_scb_save w_onebuf_opt.wo_scb_save
234 #endif
235     int		wo_wrap;
236 #define w_p_wrap w_onebuf_opt.wo_wrap	/* 'wrap' */
237 #ifdef FEAT_DIFF
238     int		wo_wrap_save;	/* 'wrap' state saved for diff mode*/
239 # define w_p_wrap_save w_onebuf_opt.wo_wrap_save
240 #endif
241 #ifdef FEAT_CONCEAL
242     char_u	*wo_cocu;		/* 'concealcursor' */
243 # define w_p_cocu w_onebuf_opt.wo_cocu
244     long	wo_cole;		/* 'conceallevel' */
245 # define w_p_cole w_onebuf_opt.wo_cole
246 #endif
247 #ifdef FEAT_CURSORBIND
248     int		wo_crb;
249 # define w_p_crb w_onebuf_opt.wo_crb	/* 'cursorbind' */
250     int		wo_crb_save;	/* 'cursorbind' state saved for diff mode*/
251 # define w_p_crb_save w_onebuf_opt.wo_crb_save
252 #endif
253 
254 #ifdef FEAT_EVAL
255     int		wo_scriptID[WV_COUNT];	/* SIDs for window-local options */
256 # define w_p_scriptID w_onebuf_opt.wo_scriptID
257 #endif
258 } winopt_T;
259 
260 /*
261  * Window info stored with a buffer.
262  *
263  * Two types of info are kept for a buffer which are associated with a
264  * specific window:
265  * 1. Each window can have a different line number associated with a buffer.
266  * 2. The window-local options for a buffer work in a similar way.
267  * The window-info is kept in a list at b_wininfo.  It is kept in
268  * most-recently-used order.
269  */
270 struct wininfo_S
271 {
272     wininfo_T	*wi_next;	/* next entry or NULL for last entry */
273     wininfo_T	*wi_prev;	/* previous entry or NULL for first entry */
274     win_T	*wi_win;	/* pointer to window that did set wi_fpos */
275     pos_T	wi_fpos;	/* last cursor position in the file */
276     int		wi_optset;	/* TRUE when wi_opt has useful values */
277     winopt_T	wi_opt;		/* local window options */
278 #ifdef FEAT_FOLDING
279     int		wi_fold_manual;	/* copy of w_fold_manual */
280     garray_T	wi_folds;	/* clone of w_folds */
281 #endif
282 };
283 
284 /*
285  * Info used to pass info about a fold from the fold-detection code to the
286  * code that displays the foldcolumn.
287  */
288 typedef struct foldinfo
289 {
290     int		fi_level;	/* level of the fold; when this is zero the
291 				   other fields are invalid */
292     int		fi_lnum;	/* line number where fold starts */
293     int		fi_low_level;	/* lowest fold level that starts in the same
294 				   line */
295 } foldinfo_T;
296 
297 /* Structure to store info about the Visual area. */
298 typedef struct
299 {
300     pos_T	vi_start;	/* start pos of last VIsual */
301     pos_T	vi_end;		/* end position of last VIsual */
302     int		vi_mode;	/* VIsual_mode of last VIsual */
303     colnr_T	vi_curswant;	/* MAXCOL from w_curswant */
304 } visualinfo_T;
305 
306 /*
307  * structures used for undo
308  */
309 
310 typedef struct u_entry u_entry_T;
311 typedef struct u_header u_header_T;
312 struct u_entry
313 {
314     u_entry_T	*ue_next;	/* pointer to next entry in list */
315     linenr_T	ue_top;		/* number of line above undo block */
316     linenr_T	ue_bot;		/* number of line below undo block */
317     linenr_T	ue_lcount;	/* linecount when u_save called */
318     char_u	**ue_array;	/* array of lines in undo block */
319     long	ue_size;	/* number of lines in ue_array */
320 #ifdef U_DEBUG
321     int		ue_magic;	/* magic number to check allocation */
322 #endif
323 };
324 
325 struct u_header
326 {
327     /* The following have a pointer and a number. The number is used when
328      * reading the undo file in u_read_undo() */
329     union {
330 	u_header_T *ptr;	/* pointer to next undo header in list */
331 	long	   seq;
332     } uh_next;
333     union {
334 	u_header_T *ptr;	/* pointer to previous header in list */
335 	long	   seq;
336     } uh_prev;
337     union {
338 	u_header_T *ptr;	/* pointer to next header for alt. redo */
339 	long	   seq;
340     } uh_alt_next;
341     union {
342 	u_header_T *ptr;	/* pointer to previous header for alt. redo */
343 	long	   seq;
344     } uh_alt_prev;
345     long	uh_seq;		/* sequence number, higher == newer undo */
346     int		uh_walk;	/* used by undo_time() */
347     u_entry_T	*uh_entry;	/* pointer to first entry */
348     u_entry_T	*uh_getbot_entry; /* pointer to where ue_bot must be set */
349     pos_T	uh_cursor;	/* cursor position before saving */
350 #ifdef FEAT_VIRTUALEDIT
351     long	uh_cursor_vcol;
352 #endif
353     int		uh_flags;	/* see below */
354     pos_T	uh_namedm[NMARKS];	/* marks before undo/after redo */
355     visualinfo_T uh_visual;	/* Visual areas before undo/after redo */
356     time_t	uh_time;	/* timestamp when the change was made */
357     long	uh_save_nr;	/* set when the file was saved after the
358 				   changes in this block */
359 #ifdef U_DEBUG
360     int		uh_magic;	/* magic number to check allocation */
361 #endif
362 };
363 
364 /* values for uh_flags */
365 #define UH_CHANGED  0x01	/* b_changed flag before undo/after redo */
366 #define UH_EMPTYBUF 0x02	/* buffer was empty */
367 
368 /*
369  * structures used in undo.c
370  */
371 #if VIM_SIZEOF_INT > 2
372 # define ALIGN_LONG	/* longword alignment and use filler byte */
373 # define ALIGN_SIZE (sizeof(long))
374 #else
375 # define ALIGN_SIZE (sizeof(short))
376 #endif
377 
378 #define ALIGN_MASK (ALIGN_SIZE - 1)
379 
380 typedef struct m_info minfo_T;
381 
382 /*
383  * structure used to link chunks in one of the free chunk lists.
384  */
385 struct m_info
386 {
387 #ifdef ALIGN_LONG
388     long_u	m_size;		/* size of the chunk (including m_info) */
389 #else
390     short_u	m_size;		/* size of the chunk (including m_info) */
391 #endif
392     minfo_T	*m_next;	/* pointer to next free chunk in the list */
393 };
394 
395 /*
396  * things used in memfile.c
397  */
398 
399 typedef struct block_hdr    bhdr_T;
400 typedef struct memfile	    memfile_T;
401 typedef long		    blocknr_T;
402 
403 /*
404  * mf_hashtab_T is a chained hashtable with blocknr_T key and arbitrary
405  * structures as items.  This is an intrusive data structure: we require
406  * that items begin with mf_hashitem_T which contains the key and linked
407  * list pointers.  List of items in each bucket is doubly-linked.
408  */
409 
410 typedef struct mf_hashitem_S mf_hashitem_T;
411 
412 struct mf_hashitem_S
413 {
414     mf_hashitem_T   *mhi_next;
415     mf_hashitem_T   *mhi_prev;
416     blocknr_T	    mhi_key;
417 };
418 
419 #define MHT_INIT_SIZE   64
420 
421 typedef struct mf_hashtab_S
422 {
423     long_u	    mht_mask;	    /* mask used for hash value (nr of items
424 				     * in array is "mht_mask" + 1) */
425     long_u	    mht_count;	    /* nr of items inserted into hashtable */
426     mf_hashitem_T   **mht_buckets;  /* points to mht_small_buckets or
427 				     *dynamically allocated array */
428     mf_hashitem_T   *mht_small_buckets[MHT_INIT_SIZE];   /* initial buckets */
429     char	    mht_fixed;	    /* non-zero value forbids growth */
430 } mf_hashtab_T;
431 
432 /*
433  * for each (previously) used block in the memfile there is one block header.
434  *
435  * The block may be linked in the used list OR in the free list.
436  * The used blocks are also kept in hash lists.
437  *
438  * The used list is a doubly linked list, most recently used block first.
439  *	The blocks in the used list have a block of memory allocated.
440  *	mf_used_count is the number of pages in the used list.
441  * The hash lists are used to quickly find a block in the used list.
442  * The free list is a single linked list, not sorted.
443  *	The blocks in the free list have no block of memory allocated and
444  *	the contents of the block in the file (if any) is irrelevant.
445  */
446 
447 struct block_hdr
448 {
449     mf_hashitem_T bh_hashitem;      /* header for hash table and key */
450 #define bh_bnum bh_hashitem.mhi_key /* block number, part of bh_hashitem */
451 
452     bhdr_T	*bh_next;	    /* next block_hdr in free or used list */
453     bhdr_T	*bh_prev;	    /* previous block_hdr in used list */
454     char_u	*bh_data;	    /* pointer to memory (for used block) */
455     int		bh_page_count;	    /* number of pages in this block */
456 
457 #define BH_DIRTY    1
458 #define BH_LOCKED   2
459     char	bh_flags;	    /* BH_DIRTY or BH_LOCKED */
460 };
461 
462 /*
463  * when a block with a negative number is flushed to the file, it gets
464  * a positive number. Because the reference to the block is still the negative
465  * number, we remember the translation to the new positive number in the
466  * double linked trans lists. The structure is the same as the hash lists.
467  */
468 typedef struct nr_trans NR_TRANS;
469 
470 struct nr_trans
471 {
472     mf_hashitem_T nt_hashitem;		/* header for hash table and key */
473 #define nt_old_bnum nt_hashitem.mhi_key	/* old, negative, number */
474 
475     blocknr_T	nt_new_bnum;		/* new, positive, number */
476 };
477 
478 
479 typedef struct buffblock buffblock_T;
480 typedef struct buffheader buffheader_T;
481 
482 /*
483  * structure used to store one block of the stuff/redo/recording buffers
484  */
485 struct buffblock
486 {
487     buffblock_T	*b_next;	/* pointer to next buffblock */
488     char_u	b_str[1];	/* contents (actually longer) */
489 };
490 
491 /*
492  * header used for the stuff buffer and the redo buffer
493  */
494 struct buffheader
495 {
496     buffblock_T	bh_first;	/* first (dummy) block of list */
497     buffblock_T	*bh_curr;	/* buffblock for appending */
498     int		bh_index;	/* index for reading */
499     int		bh_space;	/* space in bh_curr for appending */
500 };
501 
502 /*
503  * used for completion on the command line
504  */
505 typedef struct expand
506 {
507     int		xp_context;		/* type of expansion */
508     char_u	*xp_pattern;		/* start of item to expand */
509     int		xp_pattern_len;		/* bytes in xp_pattern before cursor */
510 #if defined(FEAT_USR_CMDS) && defined(FEAT_EVAL) && defined(FEAT_CMDL_COMPL)
511     char_u	*xp_arg;		/* completion function */
512     int		xp_scriptID;		/* SID for completion function */
513 #endif
514     int		xp_backslash;		/* one of the XP_BS_ values */
515 #ifndef BACKSLASH_IN_FILENAME
516     int		xp_shell;		/* TRUE for a shell command, more
517 					   characters need to be escaped */
518 #endif
519     int		xp_numfiles;		/* number of files found by
520 						    file name completion */
521     char_u	**xp_files;		/* list of files */
522     char_u	*xp_line;		/* text being completed */
523     int		xp_col;			/* cursor position in line */
524 } expand_T;
525 
526 /* values for xp_backslash */
527 #define XP_BS_NONE	0	/* nothing special for backslashes */
528 #define XP_BS_ONE	1	/* uses one backslash before a space */
529 #define XP_BS_THREE	2	/* uses three backslashes before a space */
530 
531 /*
532  * Command modifiers ":vertical", ":browse", ":confirm" and ":hide" set a flag.
533  * This needs to be saved for recursive commands, put them in a structure for
534  * easy manipulation.
535  */
536 typedef struct
537 {
538     int		hide;			/* TRUE when ":hide" was used */
539 # ifdef FEAT_BROWSE_CMD
540     int		browse;			/* TRUE to invoke file dialog */
541 # endif
542 # ifdef FEAT_WINDOWS
543     int		split;			/* flags for win_split() */
544     int		tab;			/* > 0 when ":tab" was used */
545 # endif
546 # if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
547     int		confirm;		/* TRUE to invoke yes/no dialog */
548 # endif
549     int		keepalt;		/* TRUE when ":keepalt" was used */
550     int		keepmarks;		/* TRUE when ":keepmarks" was used */
551     int		keepjumps;		/* TRUE when ":keepjumps" was used */
552     int		lockmarks;		/* TRUE when ":lockmarks" was used */
553     int		keeppatterns;		/* TRUE when ":keeppatterns" was used */
554     int		noswapfile;		/* TRUE when ":noswapfile" was used */
555 # ifdef FEAT_AUTOCMD
556     char_u	*save_ei;		/* saved value of 'eventignore' */
557 # endif
558 } cmdmod_T;
559 
560 #define MF_SEED_LEN	8
561 
562 struct memfile
563 {
564     char_u	*mf_fname;		/* name of the file */
565     char_u	*mf_ffname;		/* idem, full path */
566     int		mf_fd;			/* file descriptor */
567     bhdr_T	*mf_free_first;		/* first block_hdr in free list */
568     bhdr_T	*mf_used_first;		/* mru block_hdr in used list */
569     bhdr_T	*mf_used_last;		/* lru block_hdr in used list */
570     unsigned	mf_used_count;		/* number of pages in used list */
571     unsigned	mf_used_count_max;	/* maximum number of pages in memory */
572     mf_hashtab_T mf_hash;		/* hash lists */
573     mf_hashtab_T mf_trans;		/* trans lists */
574     blocknr_T	mf_blocknr_max;		/* highest positive block number + 1*/
575     blocknr_T	mf_blocknr_min;		/* lowest negative block number - 1 */
576     blocknr_T	mf_neg_count;		/* number of negative blocks numbers */
577     blocknr_T	mf_infile_count;	/* number of pages in the file */
578     unsigned	mf_page_size;		/* number of bytes in a page */
579     int		mf_dirty;		/* TRUE if there are dirty blocks */
580 #ifdef FEAT_CRYPT
581     buf_T	*mf_buffer;		/* buffer this memfile is for */
582     char_u	mf_seed[MF_SEED_LEN];	/* seed for encryption */
583 
584     /* Values for key, method and seed used for reading data blocks when
585      * updating for a newly set key or method. Only when mf_old_key != NULL. */
586     char_u	*mf_old_key;
587     int		mf_old_cm;
588     char_u	mf_old_seed[MF_SEED_LEN];
589 #endif
590 };
591 
592 /*
593  * things used in memline.c
594  */
595 /*
596  * When searching for a specific line, we remember what blocks in the tree
597  * are the branches leading to that block. This is stored in ml_stack.  Each
598  * entry is a pointer to info in a block (may be data block or pointer block)
599  */
600 typedef struct info_pointer
601 {
602     blocknr_T	ip_bnum;	/* block number */
603     linenr_T	ip_low;		/* lowest lnum in this block */
604     linenr_T	ip_high;	/* highest lnum in this block */
605     int		ip_index;	/* index for block with current lnum */
606 } infoptr_T;	/* block/index pair */
607 
608 #ifdef FEAT_BYTEOFF
609 typedef struct ml_chunksize
610 {
611     int		mlcs_numlines;
612     long	mlcs_totalsize;
613 } chunksize_T;
614 
615  /* Flags when calling ml_updatechunk() */
616 
617 #define ML_CHNK_ADDLINE 1
618 #define ML_CHNK_DELLINE 2
619 #define ML_CHNK_UPDLINE 3
620 #endif
621 
622 /*
623  * the memline structure holds all the information about a memline
624  */
625 typedef struct memline
626 {
627     linenr_T	ml_line_count;	/* number of lines in the buffer */
628 
629     memfile_T	*ml_mfp;	/* pointer to associated memfile */
630 
631 #define ML_EMPTY	1	/* empty buffer */
632 #define ML_LINE_DIRTY	2	/* cached line was changed and allocated */
633 #define ML_LOCKED_DIRTY	4	/* ml_locked was changed */
634 #define ML_LOCKED_POS	8	/* ml_locked needs positive block number */
635     int		ml_flags;
636 
637     infoptr_T	*ml_stack;	/* stack of pointer blocks (array of IPTRs) */
638     int		ml_stack_top;	/* current top of ml_stack */
639     int		ml_stack_size;	/* total number of entries in ml_stack */
640 
641     linenr_T	ml_line_lnum;	/* line number of cached line, 0 if not valid */
642     char_u	*ml_line_ptr;	/* pointer to cached line */
643 
644     bhdr_T	*ml_locked;	/* block used by last ml_get */
645     linenr_T	ml_locked_low;	/* first line in ml_locked */
646     linenr_T	ml_locked_high;	/* last line in ml_locked */
647     int		ml_locked_lineadd;  /* number of lines inserted in ml_locked */
648 #ifdef FEAT_BYTEOFF
649     chunksize_T *ml_chunksize;
650     int		ml_numchunks;
651     int		ml_usedchunks;
652 #endif
653 } memline_T;
654 
655 #if defined(FEAT_SIGNS) || defined(PROTO)
656 typedef struct signlist signlist_T;
657 
658 struct signlist
659 {
660     int		id;		/* unique identifier for each placed sign */
661     linenr_T	lnum;		/* line number which has this sign */
662     int		typenr;		/* typenr of sign */
663     signlist_T	*next;		/* next signlist entry */
664 # ifdef FEAT_NETBEANS_INTG
665     signlist_T  *prev;		/* previous entry -- for easy reordering */
666 # endif
667 };
668 
669 /* type argument for buf_getsigntype() */
670 #define SIGN_ANY	0
671 #define SIGN_LINEHL	1
672 #define SIGN_ICON	2
673 #define SIGN_TEXT	3
674 #endif
675 
676 /*
677  * Argument list: Array of file names.
678  * Used for the global argument list and the argument lists local to a window.
679  */
680 typedef struct arglist
681 {
682     garray_T	al_ga;		/* growarray with the array of file names */
683     int		al_refcount;	/* number of windows using this arglist */
684     int		id;		/* id of this arglist */
685 } alist_T;
686 
687 /*
688  * For each argument remember the file name as it was given, and the buffer
689  * number that contains the expanded file name (required for when ":cd" is
690  * used.
691  */
692 typedef struct argentry
693 {
694     char_u	*ae_fname;	/* file name as specified */
695     int		ae_fnum;	/* buffer number with expanded file name */
696 } aentry_T;
697 
698 #ifdef FEAT_WINDOWS
699 # define ALIST(win) (win)->w_alist
700 #else
701 # define ALIST(win) (&global_alist)
702 #endif
703 #define GARGLIST	((aentry_T *)global_alist.al_ga.ga_data)
704 #define ARGLIST		((aentry_T *)ALIST(curwin)->al_ga.ga_data)
705 #define WARGLIST(wp)	((aentry_T *)ALIST(wp)->al_ga.ga_data)
706 #define AARGLIST(al)	((aentry_T *)((al)->al_ga.ga_data))
707 #define GARGCOUNT	(global_alist.al_ga.ga_len)
708 #define ARGCOUNT	(ALIST(curwin)->al_ga.ga_len)
709 #define WARGCOUNT(wp)	(ALIST(wp)->al_ga.ga_len)
710 
711 /*
712  * A list used for saving values of "emsg_silent".  Used by ex_try() to save the
713  * value of "emsg_silent" if it was non-zero.  When this is done, the CSF_SILENT
714  * flag below is set.
715  */
716 
717 typedef struct eslist_elem eslist_T;
718 struct eslist_elem
719 {
720     int		saved_emsg_silent;	/* saved value of "emsg_silent" */
721     eslist_T	*next;			/* next element on the list */
722 };
723 
724 /*
725  * For conditional commands a stack is kept of nested conditionals.
726  * When cs_idx < 0, there is no conditional command.
727  */
728 #define CSTACK_LEN	50
729 
730 struct condstack
731 {
732     short	cs_flags[CSTACK_LEN];	/* CSF_ flags */
733     char	cs_pending[CSTACK_LEN];	/* CSTP_: what's pending in ":finally"*/
734     union {
735 	void	*csp_rv[CSTACK_LEN];	/* return typeval for pending return */
736 	void	*csp_ex[CSTACK_LEN];	/* exception for pending throw */
737     }		cs_pend;
738     void	*cs_forinfo[CSTACK_LEN]; /* info used by ":for" */
739     int		cs_line[CSTACK_LEN];	/* line nr of ":while"/":for" line */
740     int		cs_idx;			/* current entry, or -1 if none */
741     int		cs_looplevel;		/* nr of nested ":while"s and ":for"s */
742     int		cs_trylevel;		/* nr of nested ":try"s */
743     eslist_T	*cs_emsg_silent_list;	/* saved values of "emsg_silent" */
744     char	cs_lflags;		/* loop flags: CSL_ flags */
745 };
746 # define cs_rettv	cs_pend.csp_rv
747 # define cs_exception	cs_pend.csp_ex
748 
749 /* There is no CSF_IF, the lack of CSF_WHILE, CSF_FOR and CSF_TRY means ":if"
750  * was used. */
751 # define CSF_TRUE	0x0001	/* condition was TRUE */
752 # define CSF_ACTIVE	0x0002	/* current state is active */
753 # define CSF_ELSE	0x0004	/* ":else" has been passed */
754 # define CSF_WHILE	0x0008	/* is a ":while" */
755 # define CSF_FOR	0x0010	/* is a ":for" */
756 
757 # define CSF_TRY	0x0100	/* is a ":try" */
758 # define CSF_FINALLY	0x0200	/* ":finally" has been passed */
759 # define CSF_THROWN	0x0400	/* exception thrown to this try conditional */
760 # define CSF_CAUGHT	0x0800  /* exception caught by this try conditional */
761 # define CSF_SILENT	0x1000	/* "emsg_silent" reset by ":try" */
762 /* Note that CSF_ELSE is only used when CSF_TRY and CSF_WHILE are unset
763  * (an ":if"), and CSF_SILENT is only used when CSF_TRY is set. */
764 
765 /*
766  * What's pending for being reactivated at the ":endtry" of this try
767  * conditional:
768  */
769 # define CSTP_NONE	0	/* nothing pending in ":finally" clause */
770 # define CSTP_ERROR	1	/* an error is pending */
771 # define CSTP_INTERRUPT	2	/* an interrupt is pending */
772 # define CSTP_THROW	4	/* a throw is pending */
773 # define CSTP_BREAK	8	/* ":break" is pending */
774 # define CSTP_CONTINUE	16	/* ":continue" is pending */
775 # define CSTP_RETURN	24	/* ":return" is pending */
776 # define CSTP_FINISH	32	/* ":finish" is pending */
777 
778 /*
779  * Flags for the cs_lflags item in struct condstack.
780  */
781 # define CSL_HAD_LOOP	 1	/* just found ":while" or ":for" */
782 # define CSL_HAD_ENDLOOP 2	/* just found ":endwhile" or ":endfor" */
783 # define CSL_HAD_CONT	 4	/* just found ":continue" */
784 # define CSL_HAD_FINA	 8	/* just found ":finally" */
785 
786 /*
787  * A list of error messages that can be converted to an exception.  "throw_msg"
788  * is only set in the first element of the list.  Usually, it points to the
789  * original message stored in that element, but sometimes it points to a later
790  * message in the list.  See cause_errthrow() below.
791  */
792 struct msglist
793 {
794     char_u		*msg;		/* original message */
795     char_u		*throw_msg;	/* msg to throw: usually original one */
796     struct msglist	*next;		/* next of several messages in a row */
797 };
798 
799 /*
800  * Structure describing an exception.
801  * (don't use "struct exception", it's used by the math library).
802  */
803 typedef struct vim_exception except_T;
804 struct vim_exception
805 {
806     int			type;		/* exception type */
807     char_u		*value;		/* exception value */
808     struct msglist	*messages;	/* message(s) causing error exception */
809     char_u		*throw_name;	/* name of the throw point */
810     linenr_T		throw_lnum;	/* line number of the throw point */
811     except_T		*caught;	/* next exception on the caught stack */
812 };
813 
814 /*
815  * The exception types.
816  */
817 #define ET_USER		0	/* exception caused by ":throw" command */
818 #define ET_ERROR	1	/* error exception */
819 #define ET_INTERRUPT	2	/* interrupt exception triggered by Ctrl-C */
820 
821 /*
822  * Structure to save the error/interrupt/exception state between calls to
823  * enter_cleanup() and leave_cleanup().  Must be allocated as an automatic
824  * variable by the (common) caller of these functions.
825  */
826 typedef struct cleanup_stuff cleanup_T;
827 struct cleanup_stuff
828 {
829     int pending;		/* error/interrupt/exception state */
830     except_T *exception;	/* exception value */
831 };
832 
833 #ifdef FEAT_SYN_HL
834 /* struct passed to in_id_list() */
835 struct sp_syn
836 {
837     int		inc_tag;	/* ":syn include" unique tag */
838     short	id;		/* highlight group ID of item */
839     short	*cont_in_list;	/* cont.in group IDs, if non-zero */
840 };
841 
842 /*
843  * Each keyword has one keyentry, which is linked in a hash list.
844  */
845 typedef struct keyentry keyentry_T;
846 
847 struct keyentry
848 {
849     keyentry_T	*ke_next;	/* next entry with identical "keyword[]" */
850     struct sp_syn k_syn;	/* struct passed to in_id_list() */
851     short	*next_list;	/* ID list for next match (if non-zero) */
852     int		flags;
853     int		k_char;		/* conceal substitute character */
854     char_u	keyword[1];	/* actually longer */
855 };
856 
857 /*
858  * Struct used to store one state of the state stack.
859  */
860 typedef struct buf_state
861 {
862     int		    bs_idx;	 /* index of pattern */
863     int		    bs_flags;	 /* flags for pattern */
864 #ifdef FEAT_CONCEAL
865     int		    bs_seqnr;	 /* stores si_seqnr */
866     int		    bs_cchar;	 /* stores si_cchar */
867 #endif
868     reg_extmatch_T *bs_extmatch; /* external matches from start pattern */
869 } bufstate_T;
870 
871 /*
872  * syn_state contains the syntax state stack for the start of one line.
873  * Used by b_sst_array[].
874  */
875 typedef struct syn_state synstate_T;
876 
877 struct syn_state
878 {
879     synstate_T	*sst_next;	/* next entry in used or free list */
880     linenr_T	sst_lnum;	/* line number for this state */
881     union
882     {
883 	bufstate_T	sst_stack[SST_FIX_STATES]; /* short state stack */
884 	garray_T	sst_ga;	/* growarray for long state stack */
885     } sst_union;
886     int		sst_next_flags;	/* flags for sst_next_list */
887     int		sst_stacksize;	/* number of states on the stack */
888     short	*sst_next_list;	/* "nextgroup" list in this state
889 				 * (this is a copy, don't free it! */
890     disptick_T	sst_tick;	/* tick when last displayed */
891     linenr_T	sst_change_lnum;/* when non-zero, change in this line
892 				 * may have made the state invalid */
893 };
894 #endif /* FEAT_SYN_HL */
895 
896 /*
897  * Structure shared between syntax.c, screen.c and gui_x11.c.
898  */
899 typedef struct attr_entry
900 {
901     short	    ae_attr;		/* HL_BOLD, etc. */
902     union
903     {
904 	struct
905 	{
906 	    char_u	    *start;	/* start escape sequence */
907 	    char_u	    *stop;	/* stop escape sequence */
908 	} term;
909 	struct
910 	{
911 	    /* These colors need to be > 8 bits to hold 256. */
912 	    short_u	    fg_color;	/* foreground color number */
913 	    short_u	    bg_color;	/* background color number */
914 	} cterm;
915 # ifdef FEAT_GUI
916 	struct
917 	{
918 	    guicolor_T	    fg_color;	/* foreground color handle */
919 	    guicolor_T	    bg_color;	/* background color handle */
920 	    guicolor_T	    sp_color;	/* special color handle */
921 	    GuiFont	    font;	/* font handle */
922 #  ifdef FEAT_XFONTSET
923 	    GuiFontset	    fontset;	/* fontset handle */
924 #  endif
925 	} gui;
926 # endif
927     } ae_u;
928 } attrentry_T;
929 
930 #ifdef USE_ICONV
931 # ifdef HAVE_ICONV_H
932 #  include <iconv.h>
933 # else
934 #  if defined(MACOS_X)
935 #   include <sys/errno.h>
936 #   define EILSEQ ENOENT /* MacOS X does not have EILSEQ */
937 typedef struct _iconv_t *iconv_t;
938 #  else
939 #   if defined(MACOS_CLASSIC)
940 typedef struct _iconv_t *iconv_t;
941 #    define EINVAL	22
942 #    define E2BIG	7
943 #    define ENOENT	2
944 #    define EFAULT	14
945 #    define EILSEQ	123
946 #   else
947 #    include <errno.h>
948 #   endif
949 #  endif
950 typedef void *iconv_t;
951 # endif
952 #endif
953 
954 /*
955  * Used for the typeahead buffer: typebuf.
956  */
957 typedef struct
958 {
959     char_u	*tb_buf;	/* buffer for typed characters */
960     char_u	*tb_noremap;	/* mapping flags for characters in tb_buf[] */
961     int		tb_buflen;	/* size of tb_buf[] */
962     int		tb_off;		/* current position in tb_buf[] */
963     int		tb_len;		/* number of valid bytes in tb_buf[] */
964     int		tb_maplen;	/* nr of mapped bytes in tb_buf[] */
965     int		tb_silent;	/* nr of silently mapped bytes in tb_buf[] */
966     int		tb_no_abbr_cnt; /* nr of bytes without abbrev. in tb_buf[] */
967     int		tb_change_cnt;	/* nr of time tb_buf was changed; never zero */
968 } typebuf_T;
969 
970 /* Struct to hold the saved typeahead for save_typeahead(). */
971 typedef struct
972 {
973     typebuf_T		save_typebuf;
974     int			typebuf_valid;	    /* TRUE when save_typebuf valid */
975     int			old_char;
976     int			old_mod_mask;
977     buffheader_T	save_readbuf1;
978     buffheader_T	save_readbuf2;
979 #ifdef USE_INPUT_BUF
980     char_u		*save_inputbuf;
981 #endif
982 } tasave_T;
983 
984 /*
985  * Used for conversion of terminal I/O and script files.
986  */
987 typedef struct
988 {
989     int		vc_type;	/* zero or one of the CONV_ values */
990     int		vc_factor;	/* max. expansion factor */
991 # ifdef WIN3264
992     int		vc_cpfrom;	/* codepage to convert from (CONV_CODEPAGE) */
993     int		vc_cpto;	/* codepage to convert to (CONV_CODEPAGE) */
994 # endif
995 # ifdef USE_ICONV
996     iconv_t	vc_fd;		/* for CONV_ICONV */
997 # endif
998     int		vc_fail;	/* fail for invalid char, don't use '?' */
999 } vimconv_T;
1000 
1001 /*
1002  * Structure used for reading from the viminfo file.
1003  */
1004 typedef struct
1005 {
1006     char_u	*vir_line;	/* text of the current line */
1007     FILE	*vir_fd;	/* file descriptor */
1008 #ifdef FEAT_MBYTE
1009     vimconv_T	vir_conv;	/* encoding conversion */
1010 #endif
1011     garray_T	vir_barlines;	/* lines starting with | */
1012 } vir_T;
1013 
1014 #define CONV_NONE		0
1015 #define CONV_TO_UTF8		1
1016 #define CONV_9_TO_UTF8		2
1017 #define CONV_TO_LATIN1		3
1018 #define CONV_TO_LATIN9		4
1019 #define CONV_ICONV		5
1020 #ifdef WIN3264
1021 # define CONV_CODEPAGE		10	/* codepage -> codepage */
1022 #endif
1023 #ifdef MACOS_X
1024 # define CONV_MAC_LATIN1	20
1025 # define CONV_LATIN1_MAC	21
1026 # define CONV_MAC_UTF8		22
1027 # define CONV_UTF8_MAC		23
1028 #endif
1029 
1030 /*
1031  * Structure used for mappings and abbreviations.
1032  */
1033 typedef struct mapblock mapblock_T;
1034 struct mapblock
1035 {
1036     mapblock_T	*m_next;	/* next mapblock in list */
1037     char_u	*m_keys;	/* mapped from, lhs */
1038     char_u	*m_str;		/* mapped to, rhs */
1039     char_u	*m_orig_str;	/* rhs as entered by the user */
1040     int		m_keylen;	/* strlen(m_keys) */
1041     int		m_mode;		/* valid mode */
1042     int		m_noremap;	/* if non-zero no re-mapping for m_str */
1043     char	m_silent;	/* <silent> used, don't echo commands */
1044     char	m_nowait;	/* <nowait> used */
1045 #ifdef FEAT_EVAL
1046     char	m_expr;		/* <expr> used, m_str is an expression */
1047     scid_T	m_script_ID;	/* ID of script where map was defined */
1048 #endif
1049 };
1050 
1051 /*
1052  * Used for highlighting in the status line.
1053  */
1054 struct stl_hlrec
1055 {
1056     char_u	*start;
1057     int		userhl;		/* 0: no HL, 1-9: User HL, < 0 for syn ID */
1058 };
1059 
1060 
1061 /*
1062  * Syntax items - usually buffer-specific.
1063  */
1064 
1065 /* Item for a hashtable.  "hi_key" can be one of three values:
1066  * NULL:	   Never been used
1067  * HI_KEY_REMOVED: Entry was removed
1068  * Otherwise:	   Used item, pointer to the actual key; this usually is
1069  *		   inside the item, subtract an offset to locate the item.
1070  *		   This reduces the size of hashitem by 1/3.
1071  */
1072 typedef struct hashitem_S
1073 {
1074     long_u	hi_hash;	/* cached hash number of hi_key */
1075     char_u	*hi_key;
1076 } hashitem_T;
1077 
1078 /* The address of "hash_removed" is used as a magic number for hi_key to
1079  * indicate a removed item. */
1080 #define HI_KEY_REMOVED &hash_removed
1081 #define HASHITEM_EMPTY(hi) ((hi)->hi_key == NULL || (hi)->hi_key == &hash_removed)
1082 
1083 /* Initial size for a hashtable.  Our items are relatively small and growing
1084  * is expensive, thus use 16 as a start.  Must be a power of 2. */
1085 #define HT_INIT_SIZE 16
1086 
1087 typedef struct hashtable_S
1088 {
1089     long_u	ht_mask;	/* mask used for hash value (nr of items in
1090 				 * array is "ht_mask" + 1) */
1091     long_u	ht_used;	/* number of items used */
1092     long_u	ht_filled;	/* number of items used + removed */
1093     int		ht_locked;	/* counter for hash_lock() */
1094     int		ht_error;	/* when set growing failed, can't add more
1095 				   items before growing works */
1096     hashitem_T	*ht_array;	/* points to the array, allocated when it's
1097 				   not "ht_smallarray" */
1098     hashitem_T	ht_smallarray[HT_INIT_SIZE];   /* initial array */
1099 } hashtab_T;
1100 
1101 typedef long_u hash_T;		/* Type for hi_hash */
1102 
1103 
1104 #if VIM_SIZEOF_INT <= 3		/* use long if int is smaller than 32 bits */
1105 typedef long	varnumber_T;
1106 #else
1107 typedef int	varnumber_T;
1108 #endif
1109 typedef double	float_T;
1110 
1111 typedef struct listvar_S list_T;
1112 typedef struct dictvar_S dict_T;
1113 typedef struct partial_S partial_T;
1114 
1115 typedef struct jobvar_S job_T;
1116 typedef struct readq_S readq_T;
1117 typedef struct jsonq_S jsonq_T;
1118 typedef struct cbq_S cbq_T;
1119 typedef struct channel_S channel_T;
1120 
1121 typedef enum
1122 {
1123     VAR_UNKNOWN = 0,
1124     VAR_NUMBER,	 /* "v_number" is used */
1125     VAR_STRING,	 /* "v_string" is used */
1126     VAR_FUNC,	 /* "v_string" is function name */
1127     VAR_PARTIAL, /* "v_partial" is used */
1128     VAR_LIST,	 /* "v_list" is used */
1129     VAR_DICT,	 /* "v_dict" is used */
1130     VAR_FLOAT,	 /* "v_float" is used */
1131     VAR_SPECIAL, /* "v_number" is used */
1132     VAR_JOB,	 /* "v_job" is used */
1133     VAR_CHANNEL	 /* "v_channel" is used */
1134 } vartype_T;
1135 
1136 /*
1137  * Structure to hold an internal variable without a name.
1138  */
1139 typedef struct
1140 {
1141     vartype_T	v_type;
1142     char	v_lock;	    /* see below: VAR_LOCKED, VAR_FIXED */
1143     union
1144     {
1145 	varnumber_T	v_number;	/* number value */
1146 #ifdef FEAT_FLOAT
1147 	float_T		v_float;	/* floating number value */
1148 #endif
1149 	char_u		*v_string;	/* string value (can be NULL!) */
1150 	list_T		*v_list;	/* list value (can be NULL!) */
1151 	dict_T		*v_dict;	/* dict value (can be NULL!) */
1152 	partial_T	*v_partial;	/* closure: function with args */
1153 #ifdef FEAT_JOB_CHANNEL
1154 	job_T		*v_job;		/* job value (can be NULL!) */
1155 	channel_T	*v_channel;	/* channel value (can be NULL!) */
1156 #endif
1157     }		vval;
1158 } typval_T;
1159 
1160 /* Values for "dv_scope". */
1161 #define VAR_SCOPE     1	/* a:, v:, s:, etc. scope dictionaries */
1162 #define VAR_DEF_SCOPE 2	/* l:, g: scope dictionaries: here funcrefs are not
1163 			   allowed to mask existing functions */
1164 
1165 /* Values for "v_lock". */
1166 #define VAR_LOCKED  1	/* locked with lock(), can use unlock() */
1167 #define VAR_FIXED   2	/* locked forever */
1168 
1169 /*
1170  * Structure to hold an item of a list: an internal variable without a name.
1171  */
1172 typedef struct listitem_S listitem_T;
1173 
1174 struct listitem_S
1175 {
1176     listitem_T	*li_next;	/* next item in list */
1177     listitem_T	*li_prev;	/* previous item in list */
1178     typval_T	li_tv;		/* type and value of the variable */
1179 };
1180 
1181 /*
1182  * Struct used by those that are using an item in a list.
1183  */
1184 typedef struct listwatch_S listwatch_T;
1185 
1186 struct listwatch_S
1187 {
1188     listitem_T		*lw_item;	/* item being watched */
1189     listwatch_T		*lw_next;	/* next watcher */
1190 };
1191 
1192 /*
1193  * Structure to hold info about a list.
1194  */
1195 struct listvar_S
1196 {
1197     listitem_T	*lv_first;	/* first item, NULL if none */
1198     listitem_T	*lv_last;	/* last item, NULL if none */
1199     int		lv_refcount;	/* reference count */
1200     int		lv_len;		/* number of items */
1201     listwatch_T	*lv_watch;	/* first watcher, NULL if none */
1202     int		lv_idx;		/* cached index of an item */
1203     listitem_T	*lv_idx_item;	/* when not NULL item at index "lv_idx" */
1204     int		lv_copyID;	/* ID used by deepcopy() */
1205     list_T	*lv_copylist;	/* copied list used by deepcopy() */
1206     char	lv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1207     list_T	*lv_used_next;	/* next list in used lists list */
1208     list_T	*lv_used_prev;	/* previous list in used lists list */
1209 };
1210 
1211 /*
1212  * Structure to hold an item of a Dictionary.
1213  * Also used for a variable.
1214  * The key is copied into "di_key" to avoid an extra alloc/free for it.
1215  */
1216 struct dictitem_S
1217 {
1218     typval_T	di_tv;		/* type and value of the variable */
1219     char_u	di_flags;	/* flags (only used for variable) */
1220     char_u	di_key[1];	/* key (actually longer!) */
1221 };
1222 typedef struct dictitem_S dictitem_T;
1223 
1224 /* A dictitem with a 16 character key (plus NUL). */
1225 struct dictitem16_S
1226 {
1227     typval_T	di_tv;		/* type and value of the variable */
1228     char_u	di_flags;	/* flags (only used for variable) */
1229     char_u	di_key[17];	/* key */
1230 };
1231 typedef struct dictitem16_S dictitem16_T;
1232 
1233 #define DI_FLAGS_RO	1  /* "di_flags" value: read-only variable */
1234 #define DI_FLAGS_RO_SBX 2  /* "di_flags" value: read-only in the sandbox */
1235 #define DI_FLAGS_FIX	4  /* "di_flags" value: fixed: no :unlet or remove() */
1236 #define DI_FLAGS_LOCK	8  /* "di_flags" value: locked variable */
1237 #define DI_FLAGS_ALLOC	16 /* "di_flags" value: separately allocated */
1238 
1239 /*
1240  * Structure to hold info about a Dictionary.
1241  */
1242 struct dictvar_S
1243 {
1244     char	dv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1245     char	dv_scope;	/* zero, VAR_SCOPE, VAR_DEF_SCOPE */
1246     int		dv_refcount;	/* reference count */
1247     int		dv_copyID;	/* ID used by deepcopy() */
1248     hashtab_T	dv_hashtab;	/* hashtab that refers to the items */
1249     dict_T	*dv_copydict;	/* copied dict used by deepcopy() */
1250     dict_T	*dv_used_next;	/* next dict in used dicts list */
1251     dict_T	*dv_used_prev;	/* previous dict in used dicts list */
1252 };
1253 
1254 struct partial_S
1255 {
1256     int		pt_refcount;	/* reference count */
1257     char_u	*pt_name;	/* function name */
1258     int		pt_argc;	/* number of arguments */
1259     typval_T	*pt_argv;	/* arguments in allocated array */
1260     dict_T	*pt_dict;	/* dict for "self" */
1261 };
1262 
1263 typedef enum
1264 {
1265     JOB_FAILED,
1266     JOB_STARTED,
1267     JOB_ENDED
1268 } jobstatus_T;
1269 
1270 /*
1271  * Structure to hold info about a Job.
1272  */
1273 struct jobvar_S
1274 {
1275     job_T	*jv_next;
1276     job_T	*jv_prev;
1277 #ifdef UNIX
1278     pid_t	jv_pid;
1279 #endif
1280 #ifdef WIN32
1281     PROCESS_INFORMATION	jv_proc_info;
1282     HANDLE		jv_job_object;
1283 #endif
1284     jobstatus_T	jv_status;
1285     char_u	*jv_stoponexit; /* allocated */
1286     int		jv_exitval;
1287     char_u	*jv_exit_cb;	/* allocated */
1288     partial_T	*jv_exit_partial;
1289 
1290     buf_T	*jv_in_buf;	/* buffer from "in-name" */
1291 
1292     int		jv_refcount;	/* reference count */
1293     channel_T	*jv_channel;	/* channel for I/O, reference counted */
1294 };
1295 
1296 /*
1297  * Structures to hold info about a Channel.
1298  */
1299 struct readq_S
1300 {
1301     char_u	*rq_buffer;
1302     readq_T	*rq_next;
1303     readq_T	*rq_prev;
1304 };
1305 
1306 struct jsonq_S
1307 {
1308     typval_T	*jq_value;
1309     jsonq_T	*jq_next;
1310     jsonq_T	*jq_prev;
1311 };
1312 
1313 struct cbq_S
1314 {
1315     char_u	*cq_callback;
1316     partial_T	*cq_partial;
1317     int		cq_seq_nr;
1318     cbq_T	*cq_next;
1319     cbq_T	*cq_prev;
1320 };
1321 
1322 /* mode for a channel */
1323 typedef enum
1324 {
1325     MODE_NL = 0,
1326     MODE_RAW,
1327     MODE_JSON,
1328     MODE_JS
1329 } ch_mode_T;
1330 
1331 typedef enum {
1332     JIO_PIPE,	    /* default */
1333     JIO_NULL,
1334     JIO_FILE,
1335     JIO_BUFFER,
1336     JIO_OUT
1337 } job_io_T;
1338 
1339 /* Ordering matters, it is used in for loops: IN is last, only SOCK/OUT/ERR
1340  * are polled. */
1341 #define PART_SOCK   0
1342 #define CH_SOCK_FD	ch_part[PART_SOCK].ch_fd
1343 
1344 #ifdef FEAT_JOB_CHANNEL
1345 # define INVALID_FD  (-1)
1346 
1347 # define PART_OUT   1
1348 # define PART_ERR   2
1349 # define PART_IN    3
1350 # define CH_OUT_FD	ch_part[PART_OUT].ch_fd
1351 # define CH_ERR_FD	ch_part[PART_ERR].ch_fd
1352 # define CH_IN_FD	ch_part[PART_IN].ch_fd
1353 #endif
1354 
1355 /* The per-fd info for a channel. */
1356 typedef struct {
1357     sock_T	ch_fd;	    /* socket/stdin/stdout/stderr, -1 if not used */
1358 
1359 # if defined(UNIX) && !defined(HAVE_SELECT)
1360     int		ch_poll_idx;	/* used by channel_poll_setup() */
1361 # endif
1362 
1363 #ifdef FEAT_GUI_X11
1364     XtInputId	ch_inputHandler; /* Cookie for input */
1365 #endif
1366 #ifdef FEAT_GUI_GTK
1367     gint	ch_inputHandler; /* Cookie for input */
1368 #endif
1369 
1370     ch_mode_T	ch_mode;
1371     job_io_T	ch_io;
1372     int		ch_timeout;	/* request timeout in msec */
1373 
1374     readq_T	ch_head;	/* header for circular raw read queue */
1375     jsonq_T	ch_json_head;	/* header for circular json read queue */
1376     int		ch_block_id;	/* ID that channel_read_json_block() is
1377 				   waiting for */
1378     /* When ch_waiting is TRUE use ch_deadline to wait for incomplete message
1379      * to be complete. */
1380     int		ch_waiting;
1381 #ifdef WIN32
1382     DWORD	ch_deadline;
1383 #else
1384     struct timeval ch_deadline;
1385 #endif
1386 
1387     cbq_T	ch_cb_head;	/* dummy node for per-request callbacks */
1388     char_u	*ch_callback;	/* call when a msg is not handled */
1389     partial_T	*ch_partial;
1390 
1391     buf_T	*ch_buffer;	/* buffer to read from or write to */
1392     linenr_T	ch_buf_top;	/* next line to send */
1393     linenr_T	ch_buf_bot;	/* last line to send */
1394 } chanpart_T;
1395 
1396 struct channel_S {
1397     channel_T	*ch_next;
1398     channel_T	*ch_prev;
1399 
1400     int		ch_id;		/* ID of the channel */
1401     int		ch_last_msg_id;	/* ID of the last message */
1402 
1403     chanpart_T	ch_part[4];	/* info for socket, out, err and in */
1404 
1405     char	*ch_hostname;	/* only for socket, allocated */
1406     int		ch_port;	/* only for socket */
1407 
1408     int		ch_error;	/* When TRUE an error was reported.  Avoids
1409 				 * giving pages full of error messages when
1410 				 * the other side has exited, only mention the
1411 				 * first error until the connection works
1412 				 * again. */
1413 
1414     void	(*ch_nb_close_cb)(void);
1415 				/* callback for Netbeans when channel is
1416 				 * closed */
1417 
1418     char_u	*ch_callback;	/* call when any msg is not handled */
1419     partial_T	*ch_partial;
1420     char_u	*ch_close_cb;	/* call when channel is closed */
1421     partial_T	*ch_close_partial;
1422 
1423     job_T	*ch_job;	/* Job that uses this channel; this does not
1424 				 * count as a reference to avoid a circular
1425 				 * reference. */
1426     int		ch_job_killed;	/* TRUE when there was a job and it was killed
1427 				 * or we know it died. */
1428 
1429     int		ch_refcount;	/* reference count */
1430 };
1431 
1432 #define JO_MODE		    0x0001	/* channel mode */
1433 #define JO_IN_MODE	    0x0002	/* stdin mode */
1434 #define JO_OUT_MODE	    0x0004	/* stdout mode */
1435 #define JO_ERR_MODE	    0x0008	/* stderr mode */
1436 #define JO_CALLBACK	    0x0010	/* channel callback */
1437 #define JO_OUT_CALLBACK	    0x0020	/* stdout callback */
1438 #define JO_ERR_CALLBACK	    0x0040	/* stderr callback */
1439 #define JO_CLOSE_CALLBACK   0x0080	/* close callback */
1440 #define JO_WAITTIME	    0x0100	/* only for ch_open() */
1441 #define JO_TIMEOUT	    0x0200	/* all timeouts */
1442 #define JO_OUT_TIMEOUT	    0x0400	/* stdout timeouts */
1443 #define JO_ERR_TIMEOUT	    0x0800	/* stderr timeouts */
1444 #define JO_PART		    0x1000	/* "part" */
1445 #define JO_ID		    0x2000	/* "id" */
1446 #define JO_STOPONEXIT	    0x4000	/* "stoponexit" */
1447 #define JO_EXIT_CB	    0x8000	/* "exit_cb" */
1448 #define JO_OUT_IO	    0x10000	/* "out_io" */
1449 #define JO_ERR_IO	    0x20000	/* "err_io" (JO_OUT_IO << 1) */
1450 #define JO_IN_IO	    0x40000	/* "in_io" (JO_OUT_IO << 2) */
1451 #define JO_OUT_NAME	    0x80000	/* "out_name" */
1452 #define JO_ERR_NAME	    0x100000	/* "err_name" (JO_OUT_NAME << 1) */
1453 #define JO_IN_NAME	    0x200000	/* "in_name" (JO_OUT_NAME << 2) */
1454 #define JO_IN_TOP	    0x400000	/* "in_top" */
1455 #define JO_IN_BOT	    0x800000	/* "in_bot" */
1456 #define JO_OUT_BUF	    0x1000000	/* "out_buf" */
1457 #define JO_ERR_BUF	    0x2000000	/* "err_buf" (JO_OUT_BUF << 1) */
1458 #define JO_IN_BUF	    0x4000000	/* "in_buf" (JO_OUT_BUF << 2) */
1459 #define JO_CHANNEL	    0x8000000	/* "channel" */
1460 #define JO_ALL		    0xfffffff
1461 
1462 #define JO_MODE_ALL	(JO_MODE + JO_IN_MODE + JO_OUT_MODE + JO_ERR_MODE)
1463 #define JO_CB_ALL \
1464     (JO_CALLBACK + JO_OUT_CALLBACK + JO_ERR_CALLBACK + JO_CLOSE_CALLBACK)
1465 #define JO_TIMEOUT_ALL	(JO_TIMEOUT + JO_OUT_TIMEOUT + JO_ERR_TIMEOUT)
1466 
1467 /*
1468  * Options for job and channel commands.
1469  */
1470 typedef struct
1471 {
1472     int		jo_set;		/* JO_ bits for values that were set */
1473 
1474     ch_mode_T	jo_mode;
1475     ch_mode_T	jo_in_mode;
1476     ch_mode_T	jo_out_mode;
1477     ch_mode_T	jo_err_mode;
1478 
1479     job_io_T	jo_io[4];	/* PART_OUT, PART_ERR, PART_IN */
1480     char_u	jo_io_name_buf[4][NUMBUFLEN];
1481     char_u	*jo_io_name[4];	/* not allocated! */
1482     int		jo_io_buf[4];
1483     channel_T	*jo_channel;
1484 
1485     linenr_T	jo_in_top;
1486     linenr_T	jo_in_bot;
1487 
1488     char_u	*jo_callback;	/* not allocated! */
1489     partial_T	*jo_partial;	/* not referenced! */
1490     char_u	*jo_out_cb;	/* not allocated! */
1491     partial_T	*jo_out_partial; /* not referenced! */
1492     char_u	*jo_err_cb;	/* not allocated! */
1493     partial_T	*jo_err_partial; /* not referenced! */
1494     char_u	*jo_close_cb;	/* not allocated! */
1495     partial_T	*jo_close_partial; /* not referenced! */
1496     char_u	*jo_exit_cb;	/* not allocated! */
1497     partial_T	*jo_exit_partial; /* not referenced! */
1498     int		jo_waittime;
1499     int		jo_timeout;
1500     int		jo_out_timeout;
1501     int		jo_err_timeout;
1502     int		jo_part;
1503     int		jo_id;
1504     char_u	jo_soe_buf[NUMBUFLEN];
1505     char_u	*jo_stoponexit;
1506     char_u	jo_ecb_buf[NUMBUFLEN];
1507 } jobopt_T;
1508 
1509 
1510 /* structure used for explicit stack while garbage collecting hash tables */
1511 typedef struct ht_stack_S
1512 {
1513     hashtab_T		*ht;
1514     struct ht_stack_S	*prev;
1515 } ht_stack_T;
1516 
1517 /* structure used for explicit stack while garbage collecting lists */
1518 typedef struct list_stack_S
1519 {
1520     list_T		*list;
1521     struct list_stack_S	*prev;
1522 } list_stack_T;
1523 
1524 /* values for b_syn_spell: what to do with toplevel text */
1525 #define SYNSPL_DEFAULT	0	/* spell check if @Spell not defined */
1526 #define SYNSPL_TOP	1	/* spell check toplevel text */
1527 #define SYNSPL_NOTOP	2	/* don't spell check toplevel text */
1528 
1529 /* avoid #ifdefs for when b_spell is not available */
1530 #ifdef FEAT_SPELL
1531 # define B_SPELL(buf)  ((buf)->b_spell)
1532 #else
1533 # define B_SPELL(buf)  (0)
1534 #endif
1535 
1536 #ifdef FEAT_QUICKFIX
1537 typedef struct qf_info_S qf_info_T;
1538 #endif
1539 
1540 #ifdef FEAT_PROFILE
1541 /*
1542  * Used for :syntime: timing of executing a syntax pattern.
1543  */
1544 typedef struct {
1545     proftime_T	total;		/* total time used */
1546     proftime_T	slowest;	/* time of slowest call */
1547     long	count;		/* nr of times used */
1548     long	match;		/* nr of times matched */
1549 } syn_time_T;
1550 #endif
1551 
1552 #ifdef FEAT_CRYPT
1553 /*
1554  * Structure to hold the type of encryption and the state of encryption or
1555  * decryption.
1556  */
1557 typedef struct {
1558     int	    method_nr;
1559     void    *method_state;  /* method-specific state information */
1560 } cryptstate_T;
1561 
1562 /* values for method_nr */
1563 # define CRYPT_M_ZIP	0
1564 # define CRYPT_M_BF	1
1565 # define CRYPT_M_BF2	2
1566 # define CRYPT_M_COUNT	3 /* number of crypt methods */
1567 #endif
1568 
1569 
1570 /*
1571  * These are items normally related to a buffer.  But when using ":ownsyntax"
1572  * a window may have its own instance.
1573  */
1574 typedef struct {
1575 #ifdef FEAT_SYN_HL
1576     hashtab_T	b_keywtab;		/* syntax keywords hash table */
1577     hashtab_T	b_keywtab_ic;		/* idem, ignore case */
1578     int		b_syn_error;		/* TRUE when error occurred in HL */
1579     int		b_syn_ic;		/* ignore case for :syn cmds */
1580     int		b_syn_spell;		/* SYNSPL_ values */
1581     garray_T	b_syn_patterns;		/* table for syntax patterns */
1582     garray_T	b_syn_clusters;		/* table for syntax clusters */
1583     int		b_spell_cluster_id;	/* @Spell cluster ID or 0 */
1584     int		b_nospell_cluster_id;	/* @NoSpell cluster ID or 0 */
1585     int		b_syn_containedin;	/* TRUE when there is an item with a
1586 					   "containedin" argument */
1587     int		b_syn_sync_flags;	/* flags about how to sync */
1588     short	b_syn_sync_id;		/* group to sync on */
1589     long	b_syn_sync_minlines;	/* minimal sync lines offset */
1590     long	b_syn_sync_maxlines;	/* maximal sync lines offset */
1591     long	b_syn_sync_linebreaks;	/* offset for multi-line pattern */
1592     char_u	*b_syn_linecont_pat;	/* line continuation pattern */
1593     regprog_T	*b_syn_linecont_prog;	/* line continuation program */
1594 #ifdef FEAT_PROFILE
1595     syn_time_T  b_syn_linecont_time;
1596 #endif
1597     int		b_syn_linecont_ic;	/* ignore-case flag for above */
1598     int		b_syn_topgrp;		/* for ":syntax include" */
1599 # ifdef FEAT_CONCEAL
1600     int		b_syn_conceal;		/* auto-conceal for :syn cmds */
1601 # endif
1602 # ifdef FEAT_FOLDING
1603     int		b_syn_folditems;	/* number of patterns with the HL_FOLD
1604 					   flag set */
1605 # endif
1606     /*
1607      * b_sst_array[] contains the state stack for a number of lines, for the
1608      * start of that line (col == 0).  This avoids having to recompute the
1609      * syntax state too often.
1610      * b_sst_array[] is allocated to hold the state for all displayed lines,
1611      * and states for 1 out of about 20 other lines.
1612      * b_sst_array	pointer to an array of synstate_T
1613      * b_sst_len	number of entries in b_sst_array[]
1614      * b_sst_first	pointer to first used entry in b_sst_array[] or NULL
1615      * b_sst_firstfree	pointer to first free entry in b_sst_array[] or NULL
1616      * b_sst_freecount	number of free entries in b_sst_array[]
1617      * b_sst_check_lnum	entries after this lnum need to be checked for
1618      *			validity (MAXLNUM means no check needed)
1619      */
1620     synstate_T	*b_sst_array;
1621     int		b_sst_len;
1622     synstate_T	*b_sst_first;
1623     synstate_T	*b_sst_firstfree;
1624     int		b_sst_freecount;
1625     linenr_T	b_sst_check_lnum;
1626     short_u	b_sst_lasttick;	/* last display tick */
1627 #endif /* FEAT_SYN_HL */
1628 
1629 #ifdef FEAT_SPELL
1630     /* for spell checking */
1631     garray_T	b_langp;	/* list of pointers to slang_T, see spell.c */
1632     char_u	b_spell_ismw[256];/* flags: is midword char */
1633 # ifdef FEAT_MBYTE
1634     char_u	*b_spell_ismw_mb; /* multi-byte midword chars */
1635 # endif
1636     char_u	*b_p_spc;	/* 'spellcapcheck' */
1637     regprog_T	*b_cap_prog;	/* program for 'spellcapcheck' */
1638     char_u	*b_p_spf;	/* 'spellfile' */
1639     char_u	*b_p_spl;	/* 'spelllang' */
1640 # ifdef FEAT_MBYTE
1641     int		b_cjk;		/* all CJK letters as OK */
1642 # endif
1643 #endif
1644 #if !defined(FEAT_SYN_HL) && !defined(FEAT_SPELL)
1645     int		dummy;
1646 #endif
1647     char_u	b_syn_chartab[32];	/* syntax iskeyword option */
1648     char_u	*b_syn_isk;		/* iskeyword option */
1649 } synblock_T;
1650 
1651 
1652 /*
1653  * buffer: structure that holds information about one file
1654  *
1655  * Several windows can share a single Buffer
1656  * A buffer is unallocated if there is no memfile for it.
1657  * A buffer is new if the associated file has never been loaded yet.
1658  */
1659 
1660 struct file_buffer
1661 {
1662     memline_T	b_ml;		/* associated memline (also contains line
1663 				   count) */
1664 
1665     buf_T	*b_next;	/* links in list of buffers */
1666     buf_T	*b_prev;
1667 
1668     int		b_nwindows;	/* nr of windows open on this buffer */
1669 
1670     int		b_flags;	/* various BF_ flags */
1671 #ifdef FEAT_AUTOCMD
1672     int		b_closing;	/* buffer is being closed, don't let
1673 				   autocommands close it too. */
1674 #endif
1675 
1676     /*
1677      * b_ffname has the full path of the file (NULL for no name).
1678      * b_sfname is the name as the user typed it (or NULL).
1679      * b_fname is the same as b_sfname, unless ":cd" has been done,
1680      *		then it is the same as b_ffname (NULL for no name).
1681      */
1682     char_u	*b_ffname;	/* full path file name */
1683     char_u	*b_sfname;	/* short file name */
1684     char_u	*b_fname;	/* current file name */
1685 
1686 #ifdef UNIX
1687     int		b_dev_valid;	/* TRUE when b_dev has a valid number */
1688     dev_t	b_dev;		/* device number */
1689     ino_t	b_ino;		/* inode number */
1690 #endif
1691 #ifdef FEAT_CW_EDITOR
1692     FSSpec	b_FSSpec;	/* MacOS File Identification */
1693 #endif
1694 #ifdef VMS
1695     char	 b_fab_rfm;	/* Record format    */
1696     char	 b_fab_rat;	/* Record attribute */
1697     unsigned int b_fab_mrs;	/* Max record size  */
1698 #endif
1699     int		b_fnum;		/* buffer number for this file. */
1700 
1701     int		b_changed;	/* 'modified': Set to TRUE if something in the
1702 				   file has been changed and not written out. */
1703     int		b_changedtick;	/* incremented for each change, also for undo */
1704 
1705     int		b_saving;	/* Set to TRUE if we are in the middle of
1706 				   saving the buffer. */
1707 
1708     /*
1709      * Changes to a buffer require updating of the display.  To minimize the
1710      * work, remember changes made and update everything at once.
1711      */
1712     int		b_mod_set;	/* TRUE when there are changes since the last
1713 				   time the display was updated */
1714     linenr_T	b_mod_top;	/* topmost lnum that was changed */
1715     linenr_T	b_mod_bot;	/* lnum below last changed line, AFTER the
1716 				   change */
1717     long	b_mod_xlines;	/* number of extra buffer lines inserted;
1718 				   negative when lines were deleted */
1719 
1720     wininfo_T	*b_wininfo;	/* list of last used info for each window */
1721 
1722     long	b_mtime;	/* last change time of original file */
1723     long	b_mtime_read;	/* last change time when reading */
1724     off_t	b_orig_size;	/* size of original file in bytes */
1725     int		b_orig_mode;	/* mode of original file */
1726 
1727     pos_T	b_namedm[NMARKS]; /* current named marks (mark.c) */
1728 
1729     /* These variables are set when VIsual_active becomes FALSE */
1730     visualinfo_T b_visual;
1731 #ifdef FEAT_EVAL
1732     int		b_visual_mode_eval;  /* b_visual.vi_mode for visualmode() */
1733 #endif
1734 
1735     pos_T	b_last_cursor;	/* cursor position when last unloading this
1736 				   buffer */
1737     pos_T	b_last_insert;	/* where Insert mode was left */
1738     pos_T	b_last_change;	/* position of last change: '. mark */
1739 
1740 #ifdef FEAT_JUMPLIST
1741     /*
1742      * the changelist contains old change positions
1743      */
1744     pos_T	b_changelist[JUMPLISTSIZE];
1745     int		b_changelistlen;	/* number of active entries */
1746     int		b_new_change;		/* set by u_savecommon() */
1747 #endif
1748 
1749     /*
1750      * Character table, only used in charset.c for 'iskeyword'
1751      * 32 bytes of 8 bits: 1 bit per character 0-255.
1752      */
1753     char_u	b_chartab[32];
1754 
1755 #ifdef FEAT_LOCALMAP
1756     /* Table used for mappings local to a buffer. */
1757     mapblock_T	*(b_maphash[256]);
1758 
1759     /* First abbreviation local to a buffer. */
1760     mapblock_T	*b_first_abbr;
1761 #endif
1762 #ifdef FEAT_USR_CMDS
1763     /* User commands local to the buffer. */
1764     garray_T	b_ucmds;
1765 #endif
1766     /*
1767      * start and end of an operator, also used for '[ and ']
1768      */
1769     pos_T	b_op_start;
1770     pos_T	b_op_start_orig;  /* used for Insstart_orig */
1771     pos_T	b_op_end;
1772 
1773 #ifdef FEAT_VIMINFO
1774     int		b_marks_read;	/* Have we read viminfo marks yet? */
1775 #endif
1776 
1777     /*
1778      * The following only used in undo.c.
1779      */
1780     u_header_T	*b_u_oldhead;	/* pointer to oldest header */
1781     u_header_T	*b_u_newhead;	/* pointer to newest header; may not be valid
1782 				   if b_u_curhead is not NULL */
1783     u_header_T	*b_u_curhead;	/* pointer to current header */
1784     int		b_u_numhead;	/* current number of headers */
1785     int		b_u_synced;	/* entry lists are synced */
1786     long	b_u_seq_last;	/* last used undo sequence number */
1787     long	b_u_save_nr_last; /* counter for last file write */
1788     long	b_u_seq_cur;	/* hu_seq of header below which we are now */
1789     time_t	b_u_time_cur;	/* uh_time of header below which we are now */
1790     long	b_u_save_nr_cur; /* file write nr after which we are now */
1791 
1792     /*
1793      * variables for "U" command in undo.c
1794      */
1795     char_u	*b_u_line_ptr;	/* saved line for "U" command */
1796     linenr_T	b_u_line_lnum;	/* line number of line in u_line */
1797     colnr_T	b_u_line_colnr;	/* optional column number */
1798 
1799 #ifdef FEAT_INS_EXPAND
1800     int		b_scanned;	/* ^N/^P have scanned this buffer */
1801 #endif
1802 
1803     /* flags for use of ":lmap" and IM control */
1804     long	b_p_iminsert;	/* input mode for insert */
1805     long	b_p_imsearch;	/* input mode for search */
1806 #define B_IMODE_USE_INSERT -1	/*	Use b_p_iminsert value for search */
1807 #define B_IMODE_NONE 0		/*	Input via none */
1808 #define B_IMODE_LMAP 1		/*	Input via langmap */
1809 #ifndef USE_IM_CONTROL
1810 # define B_IMODE_LAST 1
1811 #else
1812 # define B_IMODE_IM 2		/*	Input via input method */
1813 # define B_IMODE_LAST 2
1814 #endif
1815 
1816 #ifdef FEAT_KEYMAP
1817     short	b_kmap_state;	/* using "lmap" mappings */
1818 # define KEYMAP_INIT	1	/* 'keymap' was set, call keymap_init() */
1819 # define KEYMAP_LOADED	2	/* 'keymap' mappings have been loaded */
1820     garray_T	b_kmap_ga;	/* the keymap table */
1821 #endif
1822 
1823     /*
1824      * Options local to a buffer.
1825      * They are here because their value depends on the type of file
1826      * or contents of the file being edited.
1827      */
1828     int		b_p_initialized;	/* set when options initialized */
1829 
1830 #ifdef FEAT_EVAL
1831     int		b_p_scriptID[BV_COUNT];	/* SIDs for buffer-local options */
1832 #endif
1833 
1834     int		b_p_ai;		/* 'autoindent' */
1835     int		b_p_ai_nopaste;	/* b_p_ai saved for paste mode */
1836     char_u	*b_p_bkc;	/* 'backupcopy' */
1837     unsigned	b_bkc_flags;    /* flags for 'backupcopy' */
1838     int		b_p_ci;		/* 'copyindent' */
1839     int		b_p_bin;	/* 'binary' */
1840 #ifdef FEAT_MBYTE
1841     int		b_p_bomb;	/* 'bomb' */
1842 #endif
1843 #if defined(FEAT_QUICKFIX)
1844     char_u	*b_p_bh;	/* 'bufhidden' */
1845     char_u	*b_p_bt;	/* 'buftype' */
1846 #endif
1847     int		b_p_bl;		/* 'buflisted' */
1848 #ifdef FEAT_CINDENT
1849     int		b_p_cin;	/* 'cindent' */
1850     char_u	*b_p_cino;	/* 'cinoptions' */
1851     char_u	*b_p_cink;	/* 'cinkeys' */
1852 #endif
1853 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
1854     char_u	*b_p_cinw;	/* 'cinwords' */
1855 #endif
1856 #ifdef FEAT_COMMENTS
1857     char_u	*b_p_com;	/* 'comments' */
1858 #endif
1859 #ifdef FEAT_FOLDING
1860     char_u	*b_p_cms;	/* 'commentstring' */
1861 #endif
1862 #ifdef FEAT_INS_EXPAND
1863     char_u	*b_p_cpt;	/* 'complete' */
1864 #endif
1865 #ifdef FEAT_COMPL_FUNC
1866     char_u	*b_p_cfu;	/* 'completefunc' */
1867     char_u	*b_p_ofu;	/* 'omnifunc' */
1868 #endif
1869     int		b_p_eol;	/* 'endofline' */
1870     int		b_p_fixeol;	/* 'fixendofline' */
1871     int		b_p_et;		/* 'expandtab' */
1872     int		b_p_et_nobin;	/* b_p_et saved for binary mode */
1873     int	        b_p_et_nopaste; /* b_p_et saved for paste mode */
1874 #ifdef FEAT_MBYTE
1875     char_u	*b_p_fenc;	/* 'fileencoding' */
1876 #endif
1877     char_u	*b_p_ff;	/* 'fileformat' */
1878 #ifdef FEAT_AUTOCMD
1879     char_u	*b_p_ft;	/* 'filetype' */
1880 #endif
1881     char_u	*b_p_fo;	/* 'formatoptions' */
1882     char_u	*b_p_flp;	/* 'formatlistpat' */
1883     int		b_p_inf;	/* 'infercase' */
1884     char_u	*b_p_isk;	/* 'iskeyword' */
1885 #ifdef FEAT_FIND_ID
1886     char_u	*b_p_def;	/* 'define' local value */
1887     char_u	*b_p_inc;	/* 'include' */
1888 # ifdef FEAT_EVAL
1889     char_u	*b_p_inex;	/* 'includeexpr' */
1890     long_u	b_p_inex_flags;	/* flags for 'includeexpr' */
1891 # endif
1892 #endif
1893 #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
1894     char_u	*b_p_inde;	/* 'indentexpr' */
1895     long_u	b_p_inde_flags;	/* flags for 'indentexpr' */
1896     char_u	*b_p_indk;	/* 'indentkeys' */
1897 #endif
1898 #if defined(FEAT_EVAL)
1899     char_u	*b_p_fex;	/* 'formatexpr' */
1900     long_u	b_p_fex_flags;	/* flags for 'formatexpr' */
1901 #endif
1902 #ifdef FEAT_CRYPT
1903     char_u	*b_p_key;	/* 'key' */
1904 #endif
1905     char_u	*b_p_kp;	/* 'keywordprg' */
1906 #ifdef FEAT_LISP
1907     int		b_p_lisp;	/* 'lisp' */
1908 #endif
1909     char_u	*b_p_mps;	/* 'matchpairs' */
1910     int		b_p_ml;		/* 'modeline' */
1911     int		b_p_ml_nobin;	/* b_p_ml saved for binary mode */
1912     int		b_p_ma;		/* 'modifiable' */
1913     char_u	*b_p_nf;	/* 'nrformats' */
1914     int		b_p_pi;		/* 'preserveindent' */
1915 #ifdef FEAT_TEXTOBJ
1916     char_u	*b_p_qe;	/* 'quoteescape' */
1917 #endif
1918     int		b_p_ro;		/* 'readonly' */
1919     long	b_p_sw;		/* 'shiftwidth' */
1920     int		b_p_sn;		/* 'shortname' */
1921 #ifdef FEAT_SMARTINDENT
1922     int		b_p_si;		/* 'smartindent' */
1923 #endif
1924     long	b_p_sts;	/* 'softtabstop' */
1925     long	b_p_sts_nopaste; /* b_p_sts saved for paste mode */
1926 #ifdef FEAT_SEARCHPATH
1927     char_u	*b_p_sua;	/* 'suffixesadd' */
1928 #endif
1929     int		b_p_swf;	/* 'swapfile' */
1930 #ifdef FEAT_SYN_HL
1931     long	b_p_smc;	/* 'synmaxcol' */
1932     char_u	*b_p_syn;	/* 'syntax' */
1933 #endif
1934     long	b_p_ts;		/* 'tabstop' */
1935     int		b_p_tx;		/* 'textmode' */
1936     long	b_p_tw;		/* 'textwidth' */
1937     long	b_p_tw_nobin;	/* b_p_tw saved for binary mode */
1938     long	b_p_tw_nopaste;	/* b_p_tw saved for paste mode */
1939     long	b_p_wm;		/* 'wrapmargin' */
1940     long	b_p_wm_nobin;	/* b_p_wm saved for binary mode */
1941     long	b_p_wm_nopaste;	/* b_p_wm saved for paste mode */
1942 #ifdef FEAT_KEYMAP
1943     char_u	*b_p_keymap;	/* 'keymap' */
1944 #endif
1945 
1946     /* local values for options which are normally global */
1947 #ifdef FEAT_QUICKFIX
1948     char_u	*b_p_gp;	/* 'grepprg' local value */
1949     char_u	*b_p_mp;	/* 'makeprg' local value */
1950     char_u	*b_p_efm;	/* 'errorformat' local value */
1951 #endif
1952     char_u	*b_p_ep;	/* 'equalprg' local value */
1953     char_u	*b_p_path;	/* 'path' local value */
1954     int		b_p_ar;		/* 'autoread' local value */
1955     char_u	*b_p_tags;	/* 'tags' local value */
1956     char_u	*b_p_tc;	/* 'tagcase' local value */
1957     unsigned	b_tc_flags;     /* flags for 'tagcase' */
1958 #ifdef FEAT_INS_EXPAND
1959     char_u	*b_p_dict;	/* 'dictionary' local value */
1960     char_u	*b_p_tsr;	/* 'thesaurus' local value */
1961 #endif
1962     long	b_p_ul;		/* 'undolevels' local value */
1963 #ifdef FEAT_PERSISTENT_UNDO
1964     int		b_p_udf;	/* 'undofile' */
1965 #endif
1966 #ifdef FEAT_LISP
1967     char_u	*b_p_lw;	/* 'lispwords' local value */
1968 #endif
1969 
1970     /* end of buffer options */
1971 
1972 #ifdef FEAT_CINDENT
1973     /* values set from b_p_cino */
1974     int		b_ind_level;
1975     int		b_ind_open_imag;
1976     int		b_ind_no_brace;
1977     int		b_ind_first_open;
1978     int		b_ind_open_extra;
1979     int		b_ind_close_extra;
1980     int		b_ind_open_left_imag;
1981     int		b_ind_jump_label;
1982     int		b_ind_case;
1983     int		b_ind_case_code;
1984     int		b_ind_case_break;
1985     int		b_ind_param;
1986     int		b_ind_func_type;
1987     int		b_ind_comment;
1988     int		b_ind_in_comment;
1989     int		b_ind_in_comment2;
1990     int		b_ind_cpp_baseclass;
1991     int		b_ind_continuation;
1992     int		b_ind_unclosed;
1993     int		b_ind_unclosed2;
1994     int		b_ind_unclosed_noignore;
1995     int		b_ind_unclosed_wrapped;
1996     int		b_ind_unclosed_whiteok;
1997     int		b_ind_matching_paren;
1998     int		b_ind_paren_prev;
1999     int		b_ind_maxparen;
2000     int		b_ind_maxcomment;
2001     int		b_ind_scopedecl;
2002     int		b_ind_scopedecl_code;
2003     int		b_ind_java;
2004     int		b_ind_js;
2005     int		b_ind_keep_case_label;
2006     int		b_ind_hash_comment;
2007     int		b_ind_cpp_namespace;
2008     int		b_ind_if_for_while;
2009 #endif
2010 
2011     linenr_T	b_no_eol_lnum;	/* non-zero lnum when last line of next binary
2012 				 * write should not have an end-of-line */
2013 
2014     int		b_start_eol;	/* last line had eol when it was read */
2015     int		b_start_ffc;	/* first char of 'ff' when edit started */
2016 #ifdef FEAT_MBYTE
2017     char_u	*b_start_fenc;	/* 'fileencoding' when edit started or NULL */
2018     int		b_bad_char;	/* "++bad=" argument when edit started or 0 */
2019     int		b_start_bomb;	/* 'bomb' when it was read */
2020 #endif
2021 
2022 #ifdef FEAT_EVAL
2023     dictitem_T	b_bufvar;	/* variable for "b:" Dictionary */
2024     dict_T	*b_vars;	/* internal variables, local to buffer */
2025 #endif
2026 
2027 #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
2028     char_u	*b_p_bexpr;	/* 'balloonexpr' local value */
2029     long_u	b_p_bexpr_flags;/* flags for 'balloonexpr' */
2030 #endif
2031 #ifdef FEAT_CRYPT
2032     char_u	*b_p_cm;	/* 'cryptmethod' */
2033 #endif
2034 
2035     /* When a buffer is created, it starts without a swap file.  b_may_swap is
2036      * then set to indicate that a swap file may be opened later.  It is reset
2037      * if a swap file could not be opened.
2038      */
2039     int		b_may_swap;
2040     int		b_did_warn;	/* Set to 1 if user has been warned on first
2041 				   change of a read-only file */
2042 
2043     /* Two special kinds of buffers:
2044      * help buffer  - used for help files, won't use a swap file.
2045      * spell buffer - used for spell info, never displayed and doesn't have a
2046      *		      file name.
2047      */
2048     int		b_help;		/* TRUE for help file buffer (when set b_p_bt
2049 				   is "help") */
2050 #ifdef FEAT_SPELL
2051     int		b_spell;	/* TRUE for a spell file buffer, most fields
2052 				   are not used!  Use the B_SPELL macro to
2053 				   access b_spell without #ifdef. */
2054 #endif
2055 
2056     int		b_shortname;	/* this file has an 8.3 file name */
2057 
2058 #ifdef FEAT_MZSCHEME
2059     void	*b_mzscheme_ref; /* The MzScheme reference to this buffer */
2060 #endif
2061 
2062 #ifdef FEAT_PERL
2063     void	*b_perl_private;
2064 #endif
2065 
2066 #ifdef FEAT_PYTHON
2067     void	*b_python_ref;	/* The Python reference to this buffer */
2068 #endif
2069 
2070 #ifdef FEAT_PYTHON3
2071     void	*b_python3_ref;	/* The Python3 reference to this buffer */
2072 #endif
2073 
2074 #ifdef FEAT_TCL
2075     void	*b_tcl_ref;
2076 #endif
2077 
2078 #ifdef FEAT_RUBY
2079     void	*b_ruby_ref;
2080 #endif
2081 
2082 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
2083     synblock_T	b_s;		/* Info related to syntax highlighting.  w_s
2084 				 * normally points to this, but some windows
2085 				 * may use a different synblock_T. */
2086 #endif
2087 
2088 #ifdef FEAT_SIGNS
2089     signlist_T	*b_signlist;	/* list of signs to draw */
2090 # ifdef FEAT_NETBEANS_INTG
2091     int		b_has_sign_column; /* Flag that is set when a first sign is
2092 				    * added and remains set until the end of
2093 				    * the netbeans session. */
2094 # endif
2095 #endif
2096 
2097 #ifdef FEAT_NETBEANS_INTG
2098     int		b_netbeans_file;    /* TRUE when buffer is owned by NetBeans */
2099     int		b_was_netbeans_file;/* TRUE if b_netbeans_file was once set */
2100 #endif
2101 #ifdef FEAT_JOB_CHANNEL
2102     int		b_write_to_channel; /* TRUE when appended lines are written to
2103 				     * a channel. */
2104 #endif
2105 
2106 #ifdef FEAT_CRYPT
2107     cryptstate_T *b_cryptstate;	/* Encryption state while reading or writing
2108 				 * the file. NULL when not using encryption. */
2109 #endif
2110     int		b_mapped_ctrl_c; /* modes where CTRL-C is mapped */
2111 
2112 }; /* file_buffer */
2113 
2114 
2115 #ifdef FEAT_DIFF
2116 /*
2117  * Stuff for diff mode.
2118  */
2119 # define DB_COUNT 4	/* up to four buffers can be diff'ed */
2120 
2121 /*
2122  * Each diffblock defines where a block of lines starts in each of the buffers
2123  * and how many lines it occupies in that buffer.  When the lines are missing
2124  * in the buffer the df_count[] is zero.  This is all counted in
2125  * buffer lines.
2126  * There is always at least one unchanged line in between the diffs.
2127  * Otherwise it would have been included in the diff above or below it.
2128  * df_lnum[] + df_count[] is the lnum below the change.  When in one buffer
2129  * lines have been inserted, in the other buffer df_lnum[] is the line below
2130  * the insertion and df_count[] is zero.  When appending lines at the end of
2131  * the buffer, df_lnum[] is one beyond the end!
2132  * This is using a linked list, because the number of differences is expected
2133  * to be reasonable small.  The list is sorted on lnum.
2134  */
2135 typedef struct diffblock_S diff_T;
2136 struct diffblock_S
2137 {
2138     diff_T	*df_next;
2139     linenr_T	df_lnum[DB_COUNT];	/* line number in buffer */
2140     linenr_T	df_count[DB_COUNT];	/* nr of inserted/changed lines */
2141 };
2142 #endif
2143 
2144 #define SNAP_HELP_IDX	0
2145 #ifdef FEAT_AUTOCMD
2146 # define SNAP_AUCMD_IDX 1
2147 # define SNAP_COUNT	2
2148 #else
2149 # define SNAP_COUNT	1
2150 #endif
2151 
2152 /*
2153  * Tab pages point to the top frame of each tab page.
2154  * Note: Most values are NOT valid for the current tab page!  Use "curwin",
2155  * "firstwin", etc. for that.  "tp_topframe" is always valid and can be
2156  * compared against "topframe" to find the current tab page.
2157  */
2158 typedef struct tabpage_S tabpage_T;
2159 struct tabpage_S
2160 {
2161     tabpage_T	    *tp_next;	    /* next tabpage or NULL */
2162     frame_T	    *tp_topframe;   /* topframe for the windows */
2163     win_T	    *tp_curwin;	    /* current window in this Tab page */
2164     win_T	    *tp_prevwin;    /* previous window in this Tab page */
2165     win_T	    *tp_firstwin;   /* first window in this Tab page */
2166     win_T	    *tp_lastwin;    /* last window in this Tab page */
2167     long	    tp_old_Rows;    /* Rows when Tab page was left */
2168     long	    tp_old_Columns; /* Columns when Tab page was left */
2169     long	    tp_ch_used;	    /* value of 'cmdheight' when frame size
2170 				       was set */
2171 #ifdef FEAT_GUI
2172     int		    tp_prev_which_scrollbars[3];
2173 				    /* previous value of which_scrollbars */
2174 #endif
2175 #ifdef FEAT_DIFF
2176     diff_T	    *tp_first_diff;
2177     buf_T	    *(tp_diffbuf[DB_COUNT]);
2178     int		    tp_diff_invalid;	/* list of diffs is outdated */
2179 #endif
2180     frame_T	    *(tp_snapshot[SNAP_COUNT]);  /* window layout snapshots */
2181 #ifdef FEAT_EVAL
2182     dictitem_T	    tp_winvar;	    /* variable for "t:" Dictionary */
2183     dict_T	    *tp_vars;	    /* internal variables, local to tab page */
2184 #endif
2185 
2186 #ifdef FEAT_PYTHON
2187     void	    *tp_python_ref;	/* The Python value for this tab page */
2188 #endif
2189 
2190 #ifdef FEAT_PYTHON3
2191     void	    *tp_python3_ref;	/* The Python value for this tab page */
2192 #endif
2193 };
2194 
2195 /*
2196  * Structure to cache info for displayed lines in w_lines[].
2197  * Each logical line has one entry.
2198  * The entry tells how the logical line is currently displayed in the window.
2199  * This is updated when displaying the window.
2200  * When the display is changed (e.g., when clearing the screen) w_lines_valid
2201  * is changed to exclude invalid entries.
2202  * When making changes to the buffer, wl_valid is reset to indicate wl_size
2203  * may not reflect what is actually in the buffer.  When wl_valid is FALSE,
2204  * the entries can only be used to count the number of displayed lines used.
2205  * wl_lnum and wl_lastlnum are invalid too.
2206  */
2207 typedef struct w_line
2208 {
2209     linenr_T	wl_lnum;	/* buffer line number for logical line */
2210     short_u	wl_size;	/* height in screen lines */
2211     char	wl_valid;	/* TRUE values are valid for text in buffer */
2212 #ifdef FEAT_FOLDING
2213     char	wl_folded;	/* TRUE when this is a range of folded lines */
2214     linenr_T	wl_lastlnum;	/* last buffer line number for logical line */
2215 #endif
2216 } wline_T;
2217 
2218 /*
2219  * Windows are kept in a tree of frames.  Each frame has a column (FR_COL)
2220  * or row (FR_ROW) layout or is a leaf, which has a window.
2221  */
2222 struct frame_S
2223 {
2224     char	fr_layout;	/* FR_LEAF, FR_COL or FR_ROW */
2225 #ifdef FEAT_WINDOWS
2226     int		fr_width;
2227     int		fr_newwidth;	/* new width used in win_equal_rec() */
2228 #endif
2229     int		fr_height;
2230     int		fr_newheight;	/* new height used in win_equal_rec() */
2231     frame_T	*fr_parent;	/* containing frame or NULL */
2232     frame_T	*fr_next;	/* frame right or below in same parent, NULL
2233 				   for first */
2234     frame_T	*fr_prev;	/* frame left or above in same parent, NULL
2235 				   for last */
2236     /* fr_child and fr_win are mutually exclusive */
2237     frame_T	*fr_child;	/* first contained frame */
2238     win_T	*fr_win;	/* window that fills this frame */
2239 };
2240 
2241 #define FR_LEAF	0	/* frame is a leaf */
2242 #define FR_ROW	1	/* frame with a row of windows */
2243 #define FR_COL	2	/* frame with a column of windows */
2244 
2245 /*
2246  * Struct used for highlighting 'hlsearch' matches, matches defined by
2247  * ":match" and matches defined by match functions.
2248  * For 'hlsearch' there is one pattern for all windows.  For ":match" and the
2249  * match functions there is a different pattern for each window.
2250  */
2251 typedef struct
2252 {
2253     regmmatch_T	rm;	/* points to the regexp program; contains last found
2254 			   match (may continue in next line) */
2255     buf_T	*buf;	/* the buffer to search for a match */
2256     linenr_T	lnum;	/* the line to search for a match */
2257     int		attr;	/* attributes to be used for a match */
2258     int		attr_cur; /* attributes currently active in win_line() */
2259     linenr_T	first_lnum;	/* first lnum to search for multi-line pat */
2260     colnr_T	startcol; /* in win_line() points to char where HL starts */
2261     colnr_T	endcol;	 /* in win_line() points to char where HL ends */
2262 #ifdef FEAT_RELTIME
2263     proftime_T	tm;	/* for a time limit */
2264 #endif
2265 } match_T;
2266 
2267 /* number of positions supported by matchaddpos() */
2268 #define MAXPOSMATCH 8
2269 
2270 /*
2271  * Same as lpos_T, but with additional field len.
2272  */
2273 typedef struct
2274 {
2275     linenr_T	lnum;	/* line number */
2276     colnr_T	col;	/* column number */
2277     int		len;	/* length: 0 - to the end of line */
2278 } llpos_T;
2279 
2280 /*
2281  * posmatch_T provides an array for storing match items for matchaddpos()
2282  * function.
2283  */
2284 typedef struct posmatch posmatch_T;
2285 struct posmatch
2286 {
2287     llpos_T	pos[MAXPOSMATCH];	/* array of positions */
2288     int		cur;			/* internal position counter */
2289     linenr_T	toplnum;		/* top buffer line */
2290     linenr_T	botlnum;		/* bottom buffer line */
2291 };
2292 
2293 /*
2294  * matchitem_T provides a linked list for storing match items for ":match" and
2295  * the match functions.
2296  */
2297 typedef struct matchitem matchitem_T;
2298 struct matchitem
2299 {
2300     matchitem_T	*next;
2301     int		id;	    /* match ID */
2302     int		priority;   /* match priority */
2303     char_u	*pattern;   /* pattern to highlight */
2304     int		hlg_id;	    /* highlight group ID */
2305     regmmatch_T	match;	    /* regexp program for pattern */
2306     posmatch_T	pos;	    /* position matches */
2307     match_T	hl;	    /* struct for doing the actual highlighting */
2308 #ifdef FEAT_CONCEAL
2309     int		conceal_char; /* cchar for Conceal highlighting */
2310 #endif
2311 };
2312 
2313 /*
2314  * Structure which contains all information that belongs to a window
2315  *
2316  * All row numbers are relative to the start of the window, except w_winrow.
2317  */
2318 struct window_S
2319 {
2320     int		w_id;		    /* unique window ID */
2321 
2322     buf_T	*w_buffer;	    /* buffer we are a window into (used
2323 				       often, keep it the first item!) */
2324 
2325 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
2326     synblock_T	*w_s;		    /* for :ownsyntax */
2327 #endif
2328 
2329 #ifdef FEAT_WINDOWS
2330     win_T	*w_prev;	    /* link to previous window */
2331     win_T	*w_next;	    /* link to next window */
2332 #endif
2333 #ifdef FEAT_AUTOCMD
2334     int		w_closing;	    /* window is being closed, don't let
2335 				       autocommands close it too. */
2336 #endif
2337 
2338     frame_T	*w_frame;	    /* frame containing this window */
2339 
2340     pos_T	w_cursor;	    /* cursor position in buffer */
2341 
2342     colnr_T	w_curswant;	    /* The column we'd like to be at.  This is
2343 				       used to try to stay in the same column
2344 				       for up/down cursor motions. */
2345 
2346     int		w_set_curswant;	    /* If set, then update w_curswant the next
2347 				       time through cursupdate() to the
2348 				       current virtual column */
2349 
2350     /*
2351      * the next seven are used to update the visual part
2352      */
2353     char	w_old_visual_mode;  /* last known VIsual_mode */
2354     linenr_T	w_old_cursor_lnum;  /* last known end of visual part */
2355     colnr_T	w_old_cursor_fcol;  /* first column for block visual part */
2356     colnr_T	w_old_cursor_lcol;  /* last column for block visual part */
2357     linenr_T	w_old_visual_lnum;  /* last known start of visual part */
2358     colnr_T	w_old_visual_col;   /* last known start of visual part */
2359     colnr_T	w_old_curswant;	    /* last known value of Curswant */
2360 
2361     /*
2362      * "w_topline", "w_leftcol" and "w_skipcol" specify the offsets for
2363      * displaying the buffer.
2364      */
2365     linenr_T	w_topline;	    /* buffer line number of the line at the
2366 				       top of the window */
2367 #ifdef FEAT_AUTOCMD
2368     char	w_topline_was_set;  /* flag set to TRUE when topline is set,
2369 				       e.g. by winrestview() */
2370 #endif
2371 #ifdef FEAT_DIFF
2372     int		w_topfill;	    /* number of filler lines above w_topline */
2373     int		w_old_topfill;	    /* w_topfill at last redraw */
2374     int		w_botfill;	    /* TRUE when filler lines are actually
2375 				       below w_topline (at end of file) */
2376     int		w_old_botfill;	    /* w_botfill at last redraw */
2377 #endif
2378     colnr_T	w_leftcol;	    /* window column number of the left most
2379 				       character in the window; used when
2380 				       'wrap' is off */
2381     colnr_T	w_skipcol;	    /* starting column when a single line
2382 				       doesn't fit in the window */
2383 
2384     /*
2385      * Layout of the window in the screen.
2386      * May need to add "msg_scrolled" to "w_winrow" in rare situations.
2387      */
2388 #ifdef FEAT_WINDOWS
2389     int		w_winrow;	    /* first row of window in screen */
2390 #endif
2391     int		w_height;	    /* number of rows in window, excluding
2392 				       status/command line(s) */
2393 #ifdef FEAT_WINDOWS
2394     int		w_status_height;    /* number of status lines (0 or 1) */
2395     int		w_wincol;	    /* Leftmost column of window in screen.
2396 				       use W_WINCOL() */
2397     int		w_width;	    /* Width of window, excluding separation.
2398 				       use W_WIDTH() */
2399     int		w_vsep_width;	    /* Number of separator columns (0 or 1).
2400 				       use W_VSEP_WIDTH() */
2401 #endif
2402 
2403     /*
2404      * === start of cached values ====
2405      */
2406     /*
2407      * Recomputing is minimized by storing the result of computations.
2408      * Use functions in screen.c to check if they are valid and to update.
2409      * w_valid is a bitfield of flags, which indicate if specific values are
2410      * valid or need to be recomputed.	See screen.c for values.
2411      */
2412     int		w_valid;
2413     pos_T	w_valid_cursor;	    /* last known position of w_cursor, used
2414 				       to adjust w_valid */
2415     colnr_T	w_valid_leftcol;    /* last known w_leftcol */
2416 
2417     /*
2418      * w_cline_height is the number of physical lines taken by the buffer line
2419      * that the cursor is on.  We use this to avoid extra calls to plines().
2420      */
2421     int		w_cline_height;	    /* current size of cursor line */
2422 #ifdef FEAT_FOLDING
2423     int		w_cline_folded;	    /* cursor line is folded */
2424 #endif
2425 
2426     int		w_cline_row;	    /* starting row of the cursor line */
2427 
2428     colnr_T	w_virtcol;	    /* column number of the cursor in the
2429 				       buffer line, as opposed to the column
2430 				       number we're at on the screen.  This
2431 				       makes a difference on lines which span
2432 				       more than one screen line or when
2433 				       w_leftcol is non-zero */
2434 
2435     /*
2436      * w_wrow and w_wcol specify the cursor position in the window.
2437      * This is related to positions in the window, not in the display or
2438      * buffer, thus w_wrow is relative to w_winrow.
2439      */
2440     int		w_wrow, w_wcol;	    /* cursor position in window */
2441 
2442     linenr_T	w_botline;	    /* number of the line below the bottom of
2443 				       the screen */
2444     int		w_empty_rows;	    /* number of ~ rows in window */
2445 #ifdef FEAT_DIFF
2446     int		w_filler_rows;	    /* number of filler rows at the end of the
2447 				       window */
2448 #endif
2449 
2450     /*
2451      * Info about the lines currently in the window is remembered to avoid
2452      * recomputing it every time.  The allocated size of w_lines[] is Rows.
2453      * Only the w_lines_valid entries are actually valid.
2454      * When the display is up-to-date w_lines[0].wl_lnum is equal to w_topline
2455      * and w_lines[w_lines_valid - 1].wl_lnum is equal to w_botline.
2456      * Between changing text and updating the display w_lines[] represents
2457      * what is currently displayed.  wl_valid is reset to indicated this.
2458      * This is used for efficient redrawing.
2459      */
2460     int		w_lines_valid;	    /* number of valid entries */
2461     wline_T	*w_lines;
2462 
2463 #ifdef FEAT_FOLDING
2464     garray_T	w_folds;	    /* array of nested folds */
2465     char	w_fold_manual;	    /* when TRUE: some folds are opened/closed
2466 				       manually */
2467     char	w_foldinvalid;	    /* when TRUE: folding needs to be
2468 				       recomputed */
2469 #endif
2470 #ifdef FEAT_LINEBREAK
2471     int		w_nrwidth;	    /* width of 'number' and 'relativenumber'
2472 				       column being used */
2473 #endif
2474 
2475     /*
2476      * === end of cached values ===
2477      */
2478 
2479     int		w_redr_type;	    /* type of redraw to be performed on win */
2480     int		w_upd_rows;	    /* number of window lines to update when
2481 				       w_redr_type is REDRAW_TOP */
2482     linenr_T	w_redraw_top;	    /* when != 0: first line needing redraw */
2483     linenr_T	w_redraw_bot;	    /* when != 0: last line needing redraw */
2484 #ifdef FEAT_WINDOWS
2485     int		w_redr_status;	    /* if TRUE status line must be redrawn */
2486 #endif
2487 
2488 #ifdef FEAT_CMDL_INFO
2489     /* remember what is shown in the ruler for this window (if 'ruler' set) */
2490     pos_T	w_ru_cursor;	    /* cursor position shown in ruler */
2491     colnr_T	w_ru_virtcol;	    /* virtcol shown in ruler */
2492     linenr_T	w_ru_topline;	    /* topline shown in ruler */
2493     linenr_T	w_ru_line_count;    /* line count used for ruler */
2494 # ifdef FEAT_DIFF
2495     int		w_ru_topfill;	    /* topfill shown in ruler */
2496 # endif
2497     char	w_ru_empty;	    /* TRUE if ruler shows 0-1 (empty line) */
2498 #endif
2499 
2500     int		w_alt_fnum;	    /* alternate file (for # and CTRL-^) */
2501 
2502 #ifdef FEAT_WINDOWS
2503     alist_T	*w_alist;	    /* pointer to arglist for this window */
2504 #endif
2505     int		w_arg_idx;	    /* current index in argument list (can be
2506 				       out of range!) */
2507     int		w_arg_idx_invalid;  /* editing another file than w_arg_idx */
2508 
2509     char_u	*w_localdir;	    /* absolute path of local directory or
2510 				       NULL */
2511     /*
2512      * Options local to a window.
2513      * They are local because they influence the layout of the window or
2514      * depend on the window layout.
2515      * There are two values: w_onebuf_opt is local to the buffer currently in
2516      * this window, w_allbuf_opt is for all buffers in this window.
2517      */
2518     winopt_T	w_onebuf_opt;
2519     winopt_T	w_allbuf_opt;
2520 
2521     /* A few options have local flags for P_INSECURE. */
2522 #ifdef FEAT_STL_OPT
2523     long_u	w_p_stl_flags;	    /* flags for 'statusline' */
2524 #endif
2525 #ifdef FEAT_EVAL
2526     long_u	w_p_fde_flags;	    /* flags for 'foldexpr' */
2527     long_u	w_p_fdt_flags;	    /* flags for 'foldtext' */
2528 #endif
2529 #ifdef FEAT_SYN_HL
2530     int		*w_p_cc_cols;	    /* array of columns to highlight or NULL */
2531 #endif
2532 #ifdef FEAT_LINEBREAK
2533     int		w_p_brimin;	    /* minimum width for breakindent */
2534     int		w_p_brishift;	    /* additional shift for breakindent */
2535     int		w_p_brisbr;	    /* sbr in 'briopt' */
2536 #endif
2537 
2538     /* transform a pointer to a "onebuf" option into a "allbuf" option */
2539 #define GLOBAL_WO(p)	((char *)p + sizeof(winopt_T))
2540 
2541 #ifdef FEAT_SCROLLBIND
2542     long	w_scbind_pos;
2543 #endif
2544 
2545 #ifdef FEAT_EVAL
2546     dictitem_T	w_winvar;	/* variable for "w:" Dictionary */
2547     dict_T	*w_vars;	/* internal variables, local to window */
2548 #endif
2549 
2550 #if defined(FEAT_RIGHTLEFT) && defined(FEAT_FKMAP)
2551     int		w_farsi;	/* for the window dependent Farsi functions */
2552 #endif
2553 
2554     /*
2555      * The w_prev_pcmark field is used to check whether we really did jump to
2556      * a new line after setting the w_pcmark.  If not, then we revert to
2557      * using the previous w_pcmark.
2558      */
2559     pos_T	w_pcmark;	/* previous context mark */
2560     pos_T	w_prev_pcmark;	/* previous w_pcmark */
2561 
2562 #ifdef FEAT_JUMPLIST
2563     /*
2564      * the jumplist contains old cursor positions
2565      */
2566     xfmark_T	w_jumplist[JUMPLISTSIZE];
2567     int		w_jumplistlen;		/* number of active entries */
2568     int		w_jumplistidx;		/* current position */
2569 
2570     int		w_changelistidx;	/* current position in b_changelist */
2571 #endif
2572 
2573 #ifdef FEAT_SEARCH_EXTRA
2574     matchitem_T	*w_match_head;		/* head of match list */
2575     int		w_next_match_id;	/* next match ID */
2576 #endif
2577 
2578     /*
2579      * the tagstack grows from 0 upwards:
2580      * entry 0: older
2581      * entry 1: newer
2582      * entry 2: newest
2583      */
2584     taggy_T	w_tagstack[TAGSTACKSIZE];	/* the tag stack */
2585     int		w_tagstackidx;		/* idx just below active entry */
2586     int		w_tagstacklen;		/* number of tags on stack */
2587 
2588     /*
2589      * w_fraction is the fractional row of the cursor within the window, from
2590      * 0 at the top row to FRACTION_MULT at the last row.
2591      * w_prev_fraction_row was the actual cursor row when w_fraction was last
2592      * calculated.
2593      */
2594     int		w_fraction;
2595     int		w_prev_fraction_row;
2596 
2597 #ifdef FEAT_GUI
2598     scrollbar_T	w_scrollbars[2];	/* vert. Scrollbars for this window */
2599 #endif
2600 #ifdef FEAT_LINEBREAK
2601     linenr_T	w_nrwidth_line_count;	/* line count when ml_nrwidth_width
2602 					 * was computed. */
2603     long	w_nuw_cached;		/* 'numberwidth' option cached */
2604     int		w_nrwidth_width;	/* nr of chars to print line count. */
2605 #endif
2606 
2607 #ifdef FEAT_QUICKFIX
2608     qf_info_T	*w_llist;		/* Location list for this window */
2609     /*
2610      * Location list reference used in the location list window.
2611      * In a non-location list window, w_llist_ref is NULL.
2612      */
2613     qf_info_T	*w_llist_ref;
2614 #endif
2615 
2616 
2617 #ifdef FEAT_MZSCHEME
2618     void	*w_mzscheme_ref;	/* The MzScheme value for this window */
2619 #endif
2620 
2621 #ifdef FEAT_PERL
2622     void	*w_perl_private;
2623 #endif
2624 
2625 #ifdef FEAT_PYTHON
2626     void	*w_python_ref;		/* The Python value for this window */
2627 #endif
2628 
2629 #ifdef FEAT_PYTHON3
2630     void	*w_python3_ref;		/* The Python value for this window */
2631 #endif
2632 
2633 #ifdef FEAT_TCL
2634     void	*w_tcl_ref;
2635 #endif
2636 
2637 #ifdef FEAT_RUBY
2638     void	*w_ruby_ref;
2639 #endif
2640 };
2641 
2642 /*
2643  * Arguments for operators.
2644  */
2645 typedef struct oparg_S
2646 {
2647     int		op_type;	/* current pending operator type */
2648     int		regname;	/* register to use for the operator */
2649     int		motion_type;	/* type of the current cursor motion */
2650     int		motion_force;	/* force motion type: 'v', 'V' or CTRL-V */
2651     int		use_reg_one;	/* TRUE if delete uses reg 1 even when not
2652 				   linewise */
2653     int		inclusive;	/* TRUE if char motion is inclusive (only
2654 				   valid when motion_type is MCHAR */
2655     int		end_adjusted;	/* backuped b_op_end one char (only used by
2656 				   do_format()) */
2657     pos_T	start;		/* start of the operator */
2658     pos_T	end;		/* end of the operator */
2659     pos_T	cursor_start;	/* cursor position before motion for "gw" */
2660 
2661     long	line_count;	/* number of lines from op_start to op_end
2662 				   (inclusive) */
2663     int		empty;		/* op_start and op_end the same (only used by
2664 				   do_change()) */
2665     int		is_VIsual;	/* operator on Visual area */
2666     int		block_mode;	/* current operator is Visual block mode */
2667     colnr_T	start_vcol;	/* start col for block mode operator */
2668     colnr_T	end_vcol;	/* end col for block mode operator */
2669 #ifdef FEAT_AUTOCMD
2670     long	prev_opcount;	/* ca.opcount saved for K_CURSORHOLD */
2671     long	prev_count0;	/* ca.count0 saved for K_CURSORHOLD */
2672 #endif
2673 } oparg_T;
2674 
2675 /*
2676  * Arguments for Normal mode commands.
2677  */
2678 typedef struct cmdarg_S
2679 {
2680     oparg_T	*oap;		/* Operator arguments */
2681     int		prechar;	/* prefix character (optional, always 'g') */
2682     int		cmdchar;	/* command character */
2683     int		nchar;		/* next command character (optional) */
2684 #ifdef FEAT_MBYTE
2685     int		ncharC1;	/* first composing character (optional) */
2686     int		ncharC2;	/* second composing character (optional) */
2687 #endif
2688     int		extra_char;	/* yet another character (optional) */
2689     long	opcount;	/* count before an operator */
2690     long	count0;		/* count before command, default 0 */
2691     long	count1;		/* count before command, default 1 */
2692     int		arg;		/* extra argument from nv_cmds[] */
2693     int		retval;		/* return: CA_* values */
2694     char_u	*searchbuf;	/* return: pointer to search pattern or NULL */
2695 } cmdarg_T;
2696 
2697 /* values for retval: */
2698 #define CA_COMMAND_BUSY	    1	/* skip restarting edit() once */
2699 #define CA_NO_ADJ_OP_END    2	/* don't adjust operator end */
2700 
2701 #ifdef CURSOR_SHAPE
2702 /*
2703  * struct to store values from 'guicursor' and 'mouseshape'
2704  */
2705 /* Indexes in shape_table[] */
2706 #define SHAPE_IDX_N	0	/* Normal mode */
2707 #define SHAPE_IDX_V	1	/* Visual mode */
2708 #define SHAPE_IDX_I	2	/* Insert mode */
2709 #define SHAPE_IDX_R	3	/* Replace mode */
2710 #define SHAPE_IDX_C	4	/* Command line Normal mode */
2711 #define SHAPE_IDX_CI	5	/* Command line Insert mode */
2712 #define SHAPE_IDX_CR	6	/* Command line Replace mode */
2713 #define SHAPE_IDX_O	7	/* Operator-pending mode */
2714 #define SHAPE_IDX_VE	8	/* Visual mode with 'selection' exclusive */
2715 #define SHAPE_IDX_CLINE	9	/* On command line */
2716 #define SHAPE_IDX_STATUS 10	/* A status line */
2717 #define SHAPE_IDX_SDRAG 11	/* dragging a status line */
2718 #define SHAPE_IDX_VSEP	12	/* A vertical separator line */
2719 #define SHAPE_IDX_VDRAG 13	/* dragging a vertical separator line */
2720 #define SHAPE_IDX_MORE	14	/* Hit-return or More */
2721 #define SHAPE_IDX_MOREL	15	/* Hit-return or More in last line */
2722 #define SHAPE_IDX_SM	16	/* showing matching paren */
2723 #define SHAPE_IDX_COUNT	17
2724 
2725 #define SHAPE_BLOCK	0	/* block cursor */
2726 #define SHAPE_HOR	1	/* horizontal bar cursor */
2727 #define SHAPE_VER	2	/* vertical bar cursor */
2728 
2729 #define MSHAPE_NUMBERED	1000	/* offset for shapes identified by number */
2730 #define MSHAPE_HIDE	1	/* hide mouse pointer */
2731 
2732 #define SHAPE_MOUSE	1	/* used for mouse pointer shape */
2733 #define SHAPE_CURSOR	2	/* used for text cursor shape */
2734 
2735 typedef struct cursor_entry
2736 {
2737     int		shape;		/* one of the SHAPE_ defines */
2738     int		mshape;		/* one of the MSHAPE defines */
2739     int		percentage;	/* percentage of cell for bar */
2740     long	blinkwait;	/* blinking, wait time before blinking starts */
2741     long	blinkon;	/* blinking, on time */
2742     long	blinkoff;	/* blinking, off time */
2743     int		id;		/* highlight group ID */
2744     int		id_lm;		/* highlight group ID for :lmap mode */
2745     char	*name;		/* mode name (fixed) */
2746     char	used_for;	/* SHAPE_MOUSE and/or SHAPE_CURSOR */
2747 } cursorentry_T;
2748 #endif /* CURSOR_SHAPE */
2749 
2750 #ifdef FEAT_MENU
2751 
2752 /* Indices into vimmenu_T->strings[] and vimmenu_T->noremap[] for each mode */
2753 #define MENU_INDEX_INVALID	-1
2754 #define MENU_INDEX_NORMAL	0
2755 #define MENU_INDEX_VISUAL	1
2756 #define MENU_INDEX_SELECT	2
2757 #define MENU_INDEX_OP_PENDING	3
2758 #define MENU_INDEX_INSERT	4
2759 #define MENU_INDEX_CMDLINE	5
2760 #define MENU_INDEX_TIP		6
2761 #define MENU_MODES		7
2762 
2763 /* Menu modes */
2764 #define MENU_NORMAL_MODE	(1 << MENU_INDEX_NORMAL)
2765 #define MENU_VISUAL_MODE	(1 << MENU_INDEX_VISUAL)
2766 #define MENU_SELECT_MODE	(1 << MENU_INDEX_SELECT)
2767 #define MENU_OP_PENDING_MODE	(1 << MENU_INDEX_OP_PENDING)
2768 #define MENU_INSERT_MODE	(1 << MENU_INDEX_INSERT)
2769 #define MENU_CMDLINE_MODE	(1 << MENU_INDEX_CMDLINE)
2770 #define MENU_TIP_MODE		(1 << MENU_INDEX_TIP)
2771 #define MENU_ALL_MODES		((1 << MENU_INDEX_TIP) - 1)
2772 /*note MENU_INDEX_TIP is not a 'real' mode*/
2773 
2774 /* Start a menu name with this to not include it on the main menu bar */
2775 #define MNU_HIDDEN_CHAR		']'
2776 
2777 typedef struct VimMenu vimmenu_T;
2778 
2779 struct VimMenu
2780 {
2781     int		modes;		    /* Which modes is this menu visible for? */
2782     int		enabled;	    /* for which modes the menu is enabled */
2783     char_u	*name;		    /* Name of menu, possibly translated */
2784     char_u	*dname;		    /* Displayed Name ("name" without '&') */
2785 #ifdef FEAT_MULTI_LANG
2786     char_u	*en_name;	    /* "name" untranslated, NULL when "name"
2787 				     * was not translated */
2788     char_u	*en_dname;	    /* "dname" untranslated, NULL when "dname"
2789 				     * was not translated */
2790 #endif
2791     int		mnemonic;	    /* mnemonic key (after '&') */
2792     char_u	*actext;	    /* accelerator text (after TAB) */
2793     int		priority;	    /* Menu order priority */
2794 #ifdef FEAT_GUI
2795     void	(*cb)(vimmenu_T *);	    /* Call-back routine */
2796 #endif
2797 #ifdef FEAT_TOOLBAR
2798     char_u	*iconfile;	    /* name of file for icon or NULL */
2799     int		iconidx;	    /* icon index (-1 if not set) */
2800     int		icon_builtin;	    /* icon names is BuiltIn{nr} */
2801 #endif
2802     char_u	*strings[MENU_MODES]; /* Mapped string for each mode */
2803     int		noremap[MENU_MODES]; /* A REMAP_ flag for each mode */
2804     char	silent[MENU_MODES]; /* A silent flag for each mode */
2805     vimmenu_T	*children;	    /* Children of sub-menu */
2806     vimmenu_T	*parent;	    /* Parent of menu */
2807     vimmenu_T	*next;		    /* Next item in menu */
2808 #ifdef FEAT_GUI_X11
2809     Widget	id;		    /* Manage this to enable item */
2810     Widget	submenu_id;	    /* If this is submenu, add children here */
2811 #endif
2812 #ifdef FEAT_GUI_GTK
2813     GtkWidget	*id;		    /* Manage this to enable item */
2814     GtkWidget	*submenu_id;	    /* If this is submenu, add children here */
2815 # if defined(GTK_CHECK_VERSION) && !GTK_CHECK_VERSION(3,4,0)
2816     GtkWidget	*tearoff_handle;
2817 # endif
2818     GtkWidget   *label;		    /* Used by "set wak=" code. */
2819 #endif
2820 #ifdef FEAT_GUI_MOTIF
2821     int		sensitive;	    /* turn button on/off */
2822     char	**xpm;		    /* pixmap data */
2823     char	*xpm_fname;	    /* file with pixmap data */
2824 #endif
2825 #ifdef FEAT_GUI_ATHENA
2826     Pixmap	image;		    /* Toolbar image */
2827 #endif
2828 #ifdef FEAT_BEVAL_TIP
2829     BalloonEval *tip;		    /* tooltip for this menu item */
2830 #endif
2831 #ifdef FEAT_GUI_W32
2832     UINT	id;		    /* Id of menu item */
2833     HMENU	submenu_id;	    /* If this is submenu, add children here */
2834     HWND	tearoff_handle;	    /* hWnd of tearoff if created */
2835 #endif
2836 #ifdef FEAT_GUI_MAC
2837 /*  MenuHandle	id; */
2838 /*  short	index;	*/	    /* the item index within the father menu */
2839     short	menu_id;	    /* the menu id to which this item belong */
2840     short	submenu_id;	    /* the menu id of the children (could be
2841 				       get through some tricks) */
2842     MenuHandle	menu_handle;
2843     MenuHandle	submenu_handle;
2844 #endif
2845 #ifdef FEAT_GUI_PHOTON
2846     PtWidget_t	*id;
2847     PtWidget_t	*submenu_id;
2848 #endif
2849 };
2850 #else
2851 /* For generating prototypes when FEAT_MENU isn't defined. */
2852 typedef int vimmenu_T;
2853 
2854 #endif /* FEAT_MENU */
2855 
2856 /*
2857  * Struct to save values in before executing autocommands for a buffer that is
2858  * not the current buffer.  Without FEAT_AUTOCMD only "curbuf" is remembered.
2859  */
2860 typedef struct
2861 {
2862     buf_T	*save_curbuf;	/* saved curbuf */
2863 #ifdef FEAT_AUTOCMD
2864     int		use_aucmd_win;	/* using aucmd_win */
2865     win_T	*save_curwin;	/* saved curwin */
2866     win_T	*new_curwin;	/* new curwin */
2867     buf_T	*new_curbuf;	/* new curbuf */
2868     char_u	*globaldir;	/* saved value of globaldir */
2869 #endif
2870 } aco_save_T;
2871 
2872 /*
2873  * Generic option table item, only used for printer at the moment.
2874  */
2875 typedef struct
2876 {
2877     const char	*name;
2878     int		hasnum;
2879     long	number;
2880     char_u	*string;	/* points into option string */
2881     int		strlen;
2882     int		present;
2883 } option_table_T;
2884 
2885 /*
2886  * Structure to hold printing color and font attributes.
2887  */
2888 typedef struct
2889 {
2890     long_u	fg_color;
2891     long_u	bg_color;
2892     int		bold;
2893     int		italic;
2894     int		underline;
2895     int		undercurl;
2896 } prt_text_attr_T;
2897 
2898 /*
2899  * Structure passed back to the generic printer code.
2900  */
2901 typedef struct
2902 {
2903     int		n_collated_copies;
2904     int		n_uncollated_copies;
2905     int		duplex;
2906     int		chars_per_line;
2907     int		lines_per_page;
2908     int		has_color;
2909     prt_text_attr_T number;
2910 #ifdef FEAT_SYN_HL
2911     int		modec;
2912     int		do_syntax;
2913 #endif
2914     int		user_abort;
2915     char_u	*jobname;
2916 #ifdef FEAT_POSTSCRIPT
2917     char_u	*outfile;
2918     char_u	*arguments;
2919 #endif
2920 } prt_settings_T;
2921 
2922 #define PRINT_NUMBER_WIDTH 8
2923 
2924 /*
2925  * Used for popup menu items.
2926  */
2927 typedef struct
2928 {
2929     char_u	*pum_text;	/* main menu text */
2930     char_u	*pum_kind;	/* extra kind text (may be truncated) */
2931     char_u	*pum_extra;	/* extra menu text (may be truncated) */
2932     char_u	*pum_info;	/* extra info */
2933 } pumitem_T;
2934 
2935 /*
2936  * Structure used for get_tagfname().
2937  */
2938 typedef struct
2939 {
2940     char_u	*tn_tags;	/* value of 'tags' when starting */
2941     char_u	*tn_np;		/* current position in tn_tags */
2942     int		tn_did_filefind_init;
2943     int		tn_hf_idx;
2944     void	*tn_search_ctx;
2945 } tagname_T;
2946 
2947 /*
2948  * Array indexes used for cptext argument of ins_compl_add().
2949  */
2950 #define CPT_ABBR    0	/* "abbr" */
2951 #define CPT_MENU    1	/* "menu" */
2952 #define CPT_KIND    2	/* "kind" */
2953 #define CPT_INFO    3	/* "info" */
2954 #define CPT_COUNT   4	/* Number of entries */
2955 
2956 typedef struct {
2957   UINT32_T total[2];
2958   UINT32_T state[8];
2959   char_u   buffer[64];
2960 } context_sha256_T;
2961 
2962 /*
2963  * Structure used for reading in json_decode().
2964  */
2965 struct js_reader
2966 {
2967     char_u	*js_buf;	/* text to be decoded */
2968     char_u	*js_end;	/* NUL in js_buf */
2969     int		js_used;	/* bytes used from js_buf */
2970     int		(*js_fill)(struct js_reader *);
2971 				/* function to fill the buffer or NULL;
2972                                  * return TRUE when the buffer was filled */
2973     void	*js_cookie;	/* can be used by js_fill */
2974 };
2975 typedef struct js_reader js_read_T;
2976 
2977 typedef struct timer_S timer_T;
2978 struct timer_S
2979 {
2980     int		tr_id;
2981 #ifdef FEAT_TIMERS
2982     timer_T	*tr_next;
2983     timer_T	*tr_prev;
2984     proftime_T	tr_due;		    /* when the callback is to be invoked */
2985     int		tr_repeat;	    /* number of times to repeat, -1 forever */
2986     long	tr_interval;	    /* only set when it repeats */
2987     char_u	*tr_callback;	    /* allocated */
2988     partial_T	*tr_partial;
2989 #endif
2990 };
2991