xref: /vim-8.2.3635/src/structs.h (revision e2db6c97)
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 if 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 } vir_T;
1012 
1013 #define CONV_NONE		0
1014 #define CONV_TO_UTF8		1
1015 #define CONV_9_TO_UTF8		2
1016 #define CONV_TO_LATIN1		3
1017 #define CONV_TO_LATIN9		4
1018 #define CONV_ICONV		5
1019 #ifdef WIN3264
1020 # define CONV_CODEPAGE		10	/* codepage -> codepage */
1021 #endif
1022 #ifdef MACOS_X
1023 # define CONV_MAC_LATIN1	20
1024 # define CONV_LATIN1_MAC	21
1025 # define CONV_MAC_UTF8		22
1026 # define CONV_UTF8_MAC		23
1027 #endif
1028 
1029 /*
1030  * Structure used for mappings and abbreviations.
1031  */
1032 typedef struct mapblock mapblock_T;
1033 struct mapblock
1034 {
1035     mapblock_T	*m_next;	/* next mapblock in list */
1036     char_u	*m_keys;	/* mapped from, lhs */
1037     char_u	*m_str;		/* mapped to, rhs */
1038     char_u	*m_orig_str;	/* rhs as entered by the user */
1039     int		m_keylen;	/* strlen(m_keys) */
1040     int		m_mode;		/* valid mode */
1041     int		m_noremap;	/* if non-zero no re-mapping for m_str */
1042     char	m_silent;	/* <silent> used, don't echo commands */
1043     char	m_nowait;	/* <nowait> used */
1044 #ifdef FEAT_EVAL
1045     char	m_expr;		/* <expr> used, m_str is an expression */
1046     scid_T	m_script_ID;	/* ID of script where map was defined */
1047 #endif
1048 };
1049 
1050 /*
1051  * Used for highlighting in the status line.
1052  */
1053 struct stl_hlrec
1054 {
1055     char_u	*start;
1056     int		userhl;		/* 0: no HL, 1-9: User HL, < 0 for syn ID */
1057 };
1058 
1059 
1060 /*
1061  * Syntax items - usually buffer-specific.
1062  */
1063 
1064 /* Item for a hashtable.  "hi_key" can be one of three values:
1065  * NULL:	   Never been used
1066  * HI_KEY_REMOVED: Entry was removed
1067  * Otherwise:	   Used item, pointer to the actual key; this usually is
1068  *		   inside the item, subtract an offset to locate the item.
1069  *		   This reduces the size of hashitem by 1/3.
1070  */
1071 typedef struct hashitem_S
1072 {
1073     long_u	hi_hash;	/* cached hash number of hi_key */
1074     char_u	*hi_key;
1075 } hashitem_T;
1076 
1077 /* The address of "hash_removed" is used as a magic number for hi_key to
1078  * indicate a removed item. */
1079 #define HI_KEY_REMOVED &hash_removed
1080 #define HASHITEM_EMPTY(hi) ((hi)->hi_key == NULL || (hi)->hi_key == &hash_removed)
1081 
1082 /* Initial size for a hashtable.  Our items are relatively small and growing
1083  * is expensive, thus use 16 as a start.  Must be a power of 2. */
1084 #define HT_INIT_SIZE 16
1085 
1086 typedef struct hashtable_S
1087 {
1088     long_u	ht_mask;	/* mask used for hash value (nr of items in
1089 				 * array is "ht_mask" + 1) */
1090     long_u	ht_used;	/* number of items used */
1091     long_u	ht_filled;	/* number of items used + removed */
1092     int		ht_locked;	/* counter for hash_lock() */
1093     int		ht_error;	/* when set growing failed, can't add more
1094 				   items before growing works */
1095     hashitem_T	*ht_array;	/* points to the array, allocated when it's
1096 				   not "ht_smallarray" */
1097     hashitem_T	ht_smallarray[HT_INIT_SIZE];   /* initial array */
1098 } hashtab_T;
1099 
1100 typedef long_u hash_T;		/* Type for hi_hash */
1101 
1102 
1103 #if VIM_SIZEOF_INT <= 3		/* use long if int is smaller than 32 bits */
1104 typedef long	varnumber_T;
1105 #else
1106 typedef int	varnumber_T;
1107 #endif
1108 typedef double	float_T;
1109 
1110 typedef struct listvar_S list_T;
1111 typedef struct dictvar_S dict_T;
1112 
1113 /*
1114  * Structure to hold an internal variable without a name.
1115  */
1116 typedef struct
1117 {
1118     char	v_type;	    /* see below: VAR_NUMBER, VAR_STRING, etc. */
1119     char	v_lock;	    /* see below: VAR_LOCKED, VAR_FIXED */
1120     union
1121     {
1122 	varnumber_T	v_number;	/* number value */
1123 #ifdef FEAT_FLOAT
1124 	float_T		v_float;	/* floating number value */
1125 #endif
1126 	char_u		*v_string;	/* string value (can be NULL!) */
1127 	list_T		*v_list;	/* list value (can be NULL!) */
1128 	dict_T		*v_dict;	/* dict value (can be NULL!) */
1129     }		vval;
1130 } typval_T;
1131 
1132 /* Values for "v_type". */
1133 #define VAR_UNKNOWN 0
1134 #define VAR_NUMBER  1	/* "v_number" is used */
1135 #define VAR_STRING  2	/* "v_string" is used */
1136 #define VAR_FUNC    3	/* "v_string" is function name */
1137 #define VAR_LIST    4	/* "v_list" is used */
1138 #define VAR_DICT    5	/* "v_dict" is used */
1139 #define VAR_FLOAT   6	/* "v_float" is used */
1140 
1141 /* Values for "dv_scope". */
1142 #define VAR_SCOPE     1	/* a:, v:, s:, etc. scope dictionaries */
1143 #define VAR_DEF_SCOPE 2	/* l:, g: scope dictionaries: here funcrefs are not
1144 			   allowed to mask existing functions */
1145 
1146 /* Values for "v_lock". */
1147 #define VAR_LOCKED  1	/* locked with lock(), can use unlock() */
1148 #define VAR_FIXED   2	/* locked forever */
1149 
1150 /*
1151  * Structure to hold an item of a list: an internal variable without a name.
1152  */
1153 typedef struct listitem_S listitem_T;
1154 
1155 struct listitem_S
1156 {
1157     listitem_T	*li_next;	/* next item in list */
1158     listitem_T	*li_prev;	/* previous item in list */
1159     typval_T	li_tv;		/* type and value of the variable */
1160 };
1161 
1162 /*
1163  * Struct used by those that are using an item in a list.
1164  */
1165 typedef struct listwatch_S listwatch_T;
1166 
1167 struct listwatch_S
1168 {
1169     listitem_T		*lw_item;	/* item being watched */
1170     listwatch_T		*lw_next;	/* next watcher */
1171 };
1172 
1173 /*
1174  * Structure to hold info about a list.
1175  */
1176 struct listvar_S
1177 {
1178     listitem_T	*lv_first;	/* first item, NULL if none */
1179     listitem_T	*lv_last;	/* last item, NULL if none */
1180     int		lv_refcount;	/* reference count */
1181     int		lv_len;		/* number of items */
1182     listwatch_T	*lv_watch;	/* first watcher, NULL if none */
1183     int		lv_idx;		/* cached index of an item */
1184     listitem_T	*lv_idx_item;	/* when not NULL item at index "lv_idx" */
1185     int		lv_copyID;	/* ID used by deepcopy() */
1186     list_T	*lv_copylist;	/* copied list used by deepcopy() */
1187     char	lv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1188     list_T	*lv_used_next;	/* next list in used lists list */
1189     list_T	*lv_used_prev;	/* previous list in used lists list */
1190 };
1191 
1192 /*
1193  * Structure to hold an item of a Dictionary.
1194  * Also used for a variable.
1195  * The key is copied into "di_key" to avoid an extra alloc/free for it.
1196  */
1197 struct dictitem_S
1198 {
1199     typval_T	di_tv;		/* type and value of the variable */
1200     char_u	di_flags;	/* flags (only used for variable) */
1201     char_u	di_key[1];	/* key (actually longer!) */
1202 };
1203 
1204 typedef struct dictitem_S dictitem_T;
1205 
1206 #define DI_FLAGS_RO	1  /* "di_flags" value: read-only variable */
1207 #define DI_FLAGS_RO_SBX 2  /* "di_flags" value: read-only in the sandbox */
1208 #define DI_FLAGS_FIX	4  /* "di_flags" value: fixed: no :unlet or remove() */
1209 #define DI_FLAGS_LOCK	8  /* "di_flags" value: locked variable */
1210 #define DI_FLAGS_ALLOC	16 /* "di_flags" value: separately allocated */
1211 
1212 /*
1213  * Structure to hold info about a Dictionary.
1214  */
1215 struct dictvar_S
1216 {
1217     char	dv_lock;	/* zero, VAR_LOCKED, VAR_FIXED */
1218     char	dv_scope;	/* zero, VAR_SCOPE, VAR_DEF_SCOPE */
1219     int		dv_refcount;	/* reference count */
1220     int		dv_copyID;	/* ID used by deepcopy() */
1221     hashtab_T	dv_hashtab;	/* hashtab that refers to the items */
1222     dict_T	*dv_copydict;	/* copied dict used by deepcopy() */
1223     dict_T	*dv_used_next;	/* next dict in used dicts list */
1224     dict_T	*dv_used_prev;	/* previous dict in used dicts list */
1225 };
1226 
1227 /* structure used for explicit stack while garbage collecting hash tables */
1228 typedef struct ht_stack_S
1229 {
1230     hashtab_T		*ht;
1231     struct ht_stack_S	*prev;
1232 } ht_stack_T;
1233 
1234 /* structure used for explicit stack while garbage collecting lists */
1235 typedef struct list_stack_S
1236 {
1237     list_T		*list;
1238     struct list_stack_S	*prev;
1239 } list_stack_T;
1240 
1241 /* values for b_syn_spell: what to do with toplevel text */
1242 #define SYNSPL_DEFAULT	0	/* spell check if @Spell not defined */
1243 #define SYNSPL_TOP	1	/* spell check toplevel text */
1244 #define SYNSPL_NOTOP	2	/* don't spell check toplevel text */
1245 
1246 /* avoid #ifdefs for when b_spell is not available */
1247 #ifdef FEAT_SPELL
1248 # define B_SPELL(buf)  ((buf)->b_spell)
1249 #else
1250 # define B_SPELL(buf)  (0)
1251 #endif
1252 
1253 #ifdef FEAT_QUICKFIX
1254 typedef struct qf_info_S qf_info_T;
1255 #endif
1256 
1257 #ifdef FEAT_PROFILE
1258 /*
1259  * Used for :syntime: timing of executing a syntax pattern.
1260  */
1261 typedef struct {
1262     proftime_T	total;		/* total time used */
1263     proftime_T	slowest;	/* time of slowest call */
1264     long	count;		/* nr of times used */
1265     long	match;		/* nr of times matched */
1266 } syn_time_T;
1267 #endif
1268 
1269 #ifdef FEAT_CRYPT
1270 /*
1271  * Structure to hold the type of encryption and the state of encryption or
1272  * decryption.
1273  */
1274 typedef struct {
1275     int	    method_nr;
1276     void    *method_state;  /* method-specific state information */
1277 } cryptstate_T;
1278 
1279 /* values for method_nr */
1280 # define CRYPT_M_ZIP	0
1281 # define CRYPT_M_BF	1
1282 # define CRYPT_M_BF2	2
1283 # define CRYPT_M_COUNT	3 /* number of crypt methods */
1284 #endif
1285 
1286 
1287 /*
1288  * These are items normally related to a buffer.  But when using ":ownsyntax"
1289  * a window may have its own instance.
1290  */
1291 typedef struct {
1292 #ifdef FEAT_SYN_HL
1293     hashtab_T	b_keywtab;		/* syntax keywords hash table */
1294     hashtab_T	b_keywtab_ic;		/* idem, ignore case */
1295     int		b_syn_error;		/* TRUE when error occurred in HL */
1296     int		b_syn_ic;		/* ignore case for :syn cmds */
1297     int		b_syn_spell;		/* SYNSPL_ values */
1298     garray_T	b_syn_patterns;		/* table for syntax patterns */
1299     garray_T	b_syn_clusters;		/* table for syntax clusters */
1300     int		b_spell_cluster_id;	/* @Spell cluster ID or 0 */
1301     int		b_nospell_cluster_id;	/* @NoSpell cluster ID or 0 */
1302     int		b_syn_containedin;	/* TRUE when there is an item with a
1303 					   "containedin" argument */
1304     int		b_syn_sync_flags;	/* flags about how to sync */
1305     short	b_syn_sync_id;		/* group to sync on */
1306     long	b_syn_sync_minlines;	/* minimal sync lines offset */
1307     long	b_syn_sync_maxlines;	/* maximal sync lines offset */
1308     long	b_syn_sync_linebreaks;	/* offset for multi-line pattern */
1309     char_u	*b_syn_linecont_pat;	/* line continuation pattern */
1310     regprog_T	*b_syn_linecont_prog;	/* line continuation program */
1311 #ifdef FEAT_PROFILE
1312     syn_time_T  b_syn_linecont_time;
1313 #endif
1314     int		b_syn_linecont_ic;	/* ignore-case flag for above */
1315     int		b_syn_topgrp;		/* for ":syntax include" */
1316 # ifdef FEAT_CONCEAL
1317     int		b_syn_conceal;		/* auto-conceal for :syn cmds */
1318 # endif
1319 # ifdef FEAT_FOLDING
1320     int		b_syn_folditems;	/* number of patterns with the HL_FOLD
1321 					   flag set */
1322 # endif
1323     /*
1324      * b_sst_array[] contains the state stack for a number of lines, for the
1325      * start of that line (col == 0).  This avoids having to recompute the
1326      * syntax state too often.
1327      * b_sst_array[] is allocated to hold the state for all displayed lines,
1328      * and states for 1 out of about 20 other lines.
1329      * b_sst_array	pointer to an array of synstate_T
1330      * b_sst_len	number of entries in b_sst_array[]
1331      * b_sst_first	pointer to first used entry in b_sst_array[] or NULL
1332      * b_sst_firstfree	pointer to first free entry in b_sst_array[] or NULL
1333      * b_sst_freecount	number of free entries in b_sst_array[]
1334      * b_sst_check_lnum	entries after this lnum need to be checked for
1335      *			validity (MAXLNUM means no check needed)
1336      */
1337     synstate_T	*b_sst_array;
1338     int		b_sst_len;
1339     synstate_T	*b_sst_first;
1340     synstate_T	*b_sst_firstfree;
1341     int		b_sst_freecount;
1342     linenr_T	b_sst_check_lnum;
1343     short_u	b_sst_lasttick;	/* last display tick */
1344 #endif /* FEAT_SYN_HL */
1345 
1346 #ifdef FEAT_SPELL
1347     /* for spell checking */
1348     garray_T	b_langp;	/* list of pointers to slang_T, see spell.c */
1349     char_u	b_spell_ismw[256];/* flags: is midword char */
1350 # ifdef FEAT_MBYTE
1351     char_u	*b_spell_ismw_mb; /* multi-byte midword chars */
1352 # endif
1353     char_u	*b_p_spc;	/* 'spellcapcheck' */
1354     regprog_T	*b_cap_prog;	/* program for 'spellcapcheck' */
1355     char_u	*b_p_spf;	/* 'spellfile' */
1356     char_u	*b_p_spl;	/* 'spelllang' */
1357 # ifdef FEAT_MBYTE
1358     int		b_cjk;		/* all CJK letters as OK */
1359 # endif
1360 #endif
1361 #if !defined(FEAT_SYN_HL) && !defined(FEAT_SPELL)
1362     int		dummy;
1363 #endif
1364 } synblock_T;
1365 
1366 
1367 /*
1368  * buffer: structure that holds information about one file
1369  *
1370  * Several windows can share a single Buffer
1371  * A buffer is unallocated if there is no memfile for it.
1372  * A buffer is new if the associated file has never been loaded yet.
1373  */
1374 
1375 struct file_buffer
1376 {
1377     memline_T	b_ml;		/* associated memline (also contains line
1378 				   count) */
1379 
1380     buf_T	*b_next;	/* links in list of buffers */
1381     buf_T	*b_prev;
1382 
1383     int		b_nwindows;	/* nr of windows open on this buffer */
1384 
1385     int		b_flags;	/* various BF_ flags */
1386 #ifdef FEAT_AUTOCMD
1387     int		b_closing;	/* buffer is being closed, don't let
1388 				   autocommands close it too. */
1389 #endif
1390 
1391     /*
1392      * b_ffname has the full path of the file (NULL for no name).
1393      * b_sfname is the name as the user typed it (or NULL).
1394      * b_fname is the same as b_sfname, unless ":cd" has been done,
1395      *		then it is the same as b_ffname (NULL for no name).
1396      */
1397     char_u	*b_ffname;	/* full path file name */
1398     char_u	*b_sfname;	/* short file name */
1399     char_u	*b_fname;	/* current file name */
1400 
1401 #ifdef UNIX
1402     int		b_dev_valid;	/* TRUE when b_dev has a valid number */
1403     dev_t	b_dev;		/* device number */
1404     ino_t	b_ino;		/* inode number */
1405 #endif
1406 #ifdef FEAT_CW_EDITOR
1407     FSSpec	b_FSSpec;	/* MacOS File Identification */
1408 #endif
1409 #ifdef VMS
1410     char	 b_fab_rfm;	/* Record format    */
1411     char	 b_fab_rat;	/* Record attribute */
1412     unsigned int b_fab_mrs;	/* Max record size  */
1413 #endif
1414 #ifdef FEAT_SNIFF
1415     int		b_sniff;	/* file was loaded through Sniff */
1416 #endif
1417 
1418     int		b_fnum;		/* buffer number for this file. */
1419 
1420     int		b_changed;	/* 'modified': Set to TRUE if something in the
1421 				   file has been changed and not written out. */
1422     int		b_changedtick;	/* incremented for each change, also for undo */
1423 
1424     int		b_saving;	/* Set to TRUE if we are in the middle of
1425 				   saving the buffer. */
1426 
1427     /*
1428      * Changes to a buffer require updating of the display.  To minimize the
1429      * work, remember changes made and update everything at once.
1430      */
1431     int		b_mod_set;	/* TRUE when there are changes since the last
1432 				   time the display was updated */
1433     linenr_T	b_mod_top;	/* topmost lnum that was changed */
1434     linenr_T	b_mod_bot;	/* lnum below last changed line, AFTER the
1435 				   change */
1436     long	b_mod_xlines;	/* number of extra buffer lines inserted;
1437 				   negative when lines were deleted */
1438 
1439     wininfo_T	*b_wininfo;	/* list of last used info for each window */
1440 
1441     long	b_mtime;	/* last change time of original file */
1442     long	b_mtime_read;	/* last change time when reading */
1443     off_t	b_orig_size;	/* size of original file in bytes */
1444     int		b_orig_mode;	/* mode of original file */
1445 
1446     pos_T	b_namedm[NMARKS]; /* current named marks (mark.c) */
1447 
1448     /* These variables are set when VIsual_active becomes FALSE */
1449     visualinfo_T b_visual;
1450 #ifdef FEAT_EVAL
1451     int		b_visual_mode_eval;  /* b_visual.vi_mode for visualmode() */
1452 #endif
1453 
1454     pos_T	b_last_cursor;	/* cursor position when last unloading this
1455 				   buffer */
1456     pos_T	b_last_insert;	/* where Insert mode was left */
1457     pos_T	b_last_change;	/* position of last change: '. mark */
1458 
1459 #ifdef FEAT_JUMPLIST
1460     /*
1461      * the changelist contains old change positions
1462      */
1463     pos_T	b_changelist[JUMPLISTSIZE];
1464     int		b_changelistlen;	/* number of active entries */
1465     int		b_new_change;		/* set by u_savecommon() */
1466 #endif
1467 
1468     /*
1469      * Character table, only used in charset.c for 'iskeyword'
1470      * 32 bytes of 8 bits: 1 bit per character 0-255.
1471      */
1472     char_u	b_chartab[32];
1473 
1474 #ifdef FEAT_LOCALMAP
1475     /* Table used for mappings local to a buffer. */
1476     mapblock_T	*(b_maphash[256]);
1477 
1478     /* First abbreviation local to a buffer. */
1479     mapblock_T	*b_first_abbr;
1480 #endif
1481 #ifdef FEAT_USR_CMDS
1482     /* User commands local to the buffer. */
1483     garray_T	b_ucmds;
1484 #endif
1485     /*
1486      * start and end of an operator, also used for '[ and ']
1487      */
1488     pos_T	b_op_start;
1489     pos_T	b_op_start_orig;  /* used for Insstart_orig */
1490     pos_T	b_op_end;
1491 
1492 #ifdef FEAT_VIMINFO
1493     int		b_marks_read;	/* Have we read viminfo marks yet? */
1494 #endif
1495 
1496     /*
1497      * The following only used in undo.c.
1498      */
1499     u_header_T	*b_u_oldhead;	/* pointer to oldest header */
1500     u_header_T	*b_u_newhead;	/* pointer to newest header; may not be valid
1501 				   if b_u_curhead is not NULL */
1502     u_header_T	*b_u_curhead;	/* pointer to current header */
1503     int		b_u_numhead;	/* current number of headers */
1504     int		b_u_synced;	/* entry lists are synced */
1505     long	b_u_seq_last;	/* last used undo sequence number */
1506     long	b_u_save_nr_last; /* counter for last file write */
1507     long	b_u_seq_cur;	/* hu_seq of header below which we are now */
1508     time_t	b_u_time_cur;	/* uh_time of header below which we are now */
1509     long	b_u_save_nr_cur; /* file write nr after which we are now */
1510 
1511     /*
1512      * variables for "U" command in undo.c
1513      */
1514     char_u	*b_u_line_ptr;	/* saved line for "U" command */
1515     linenr_T	b_u_line_lnum;	/* line number of line in u_line */
1516     colnr_T	b_u_line_colnr;	/* optional column number */
1517 
1518 #ifdef FEAT_INS_EXPAND
1519     int		b_scanned;	/* ^N/^P have scanned this buffer */
1520 #endif
1521 
1522     /* flags for use of ":lmap" and IM control */
1523     long	b_p_iminsert;	/* input mode for insert */
1524     long	b_p_imsearch;	/* input mode for search */
1525 #define B_IMODE_USE_INSERT -1	/*	Use b_p_iminsert value for search */
1526 #define B_IMODE_NONE 0		/*	Input via none */
1527 #define B_IMODE_LMAP 1		/*	Input via langmap */
1528 #ifndef USE_IM_CONTROL
1529 # define B_IMODE_LAST 1
1530 #else
1531 # define B_IMODE_IM 2		/*	Input via input method */
1532 # define B_IMODE_LAST 2
1533 #endif
1534 
1535 #ifdef FEAT_KEYMAP
1536     short	b_kmap_state;	/* using "lmap" mappings */
1537 # define KEYMAP_INIT	1	/* 'keymap' was set, call keymap_init() */
1538 # define KEYMAP_LOADED	2	/* 'keymap' mappings have been loaded */
1539     garray_T	b_kmap_ga;	/* the keymap table */
1540 #endif
1541 
1542     /*
1543      * Options local to a buffer.
1544      * They are here because their value depends on the type of file
1545      * or contents of the file being edited.
1546      */
1547     int		b_p_initialized;	/* set when options initialized */
1548 
1549 #ifdef FEAT_EVAL
1550     int		b_p_scriptID[BV_COUNT];	/* SIDs for buffer-local options */
1551 #endif
1552 
1553     int		b_p_ai;		/* 'autoindent' */
1554     int		b_p_ai_nopaste;	/* b_p_ai saved for paste mode */
1555     char_u	*b_p_bkc;	/* 'backupcopy' */
1556     unsigned	b_bkc_flags;    /* flags for 'backupcopy' */
1557     int		b_p_ci;		/* 'copyindent' */
1558     int		b_p_bin;	/* 'binary' */
1559 #ifdef FEAT_MBYTE
1560     int		b_p_bomb;	/* 'bomb' */
1561 #endif
1562 #if defined(FEAT_QUICKFIX)
1563     char_u	*b_p_bh;	/* 'bufhidden' */
1564     char_u	*b_p_bt;	/* 'buftype' */
1565 #endif
1566     int		b_p_bl;		/* 'buflisted' */
1567 #ifdef FEAT_CINDENT
1568     int		b_p_cin;	/* 'cindent' */
1569     char_u	*b_p_cino;	/* 'cinoptions' */
1570     char_u	*b_p_cink;	/* 'cinkeys' */
1571 #endif
1572 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
1573     char_u	*b_p_cinw;	/* 'cinwords' */
1574 #endif
1575 #ifdef FEAT_COMMENTS
1576     char_u	*b_p_com;	/* 'comments' */
1577 #endif
1578 #ifdef FEAT_FOLDING
1579     char_u	*b_p_cms;	/* 'commentstring' */
1580 #endif
1581 #ifdef FEAT_INS_EXPAND
1582     char_u	*b_p_cpt;	/* 'complete' */
1583 #endif
1584 #ifdef FEAT_COMPL_FUNC
1585     char_u	*b_p_cfu;	/* 'completefunc' */
1586     char_u	*b_p_ofu;	/* 'omnifunc' */
1587 #endif
1588     int		b_p_eol;	/* 'endofline' */
1589     int		b_p_et;		/* 'expandtab' */
1590     int		b_p_et_nobin;	/* b_p_et saved for binary mode */
1591 #ifdef FEAT_MBYTE
1592     char_u	*b_p_fenc;	/* 'fileencoding' */
1593 #endif
1594     char_u	*b_p_ff;	/* 'fileformat' */
1595 #ifdef FEAT_AUTOCMD
1596     char_u	*b_p_ft;	/* 'filetype' */
1597 #endif
1598     char_u	*b_p_fo;	/* 'formatoptions' */
1599     char_u	*b_p_flp;	/* 'formatlistpat' */
1600     int		b_p_inf;	/* 'infercase' */
1601     char_u	*b_p_isk;	/* 'iskeyword' */
1602 #ifdef FEAT_FIND_ID
1603     char_u	*b_p_def;	/* 'define' local value */
1604     char_u	*b_p_inc;	/* 'include' */
1605 # ifdef FEAT_EVAL
1606     char_u	*b_p_inex;	/* 'includeexpr' */
1607     long_u	b_p_inex_flags;	/* flags for 'includeexpr' */
1608 # endif
1609 #endif
1610 #if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
1611     char_u	*b_p_inde;	/* 'indentexpr' */
1612     long_u	b_p_inde_flags;	/* flags for 'indentexpr' */
1613     char_u	*b_p_indk;	/* 'indentkeys' */
1614 #endif
1615 #if defined(FEAT_EVAL)
1616     char_u	*b_p_fex;	/* 'formatexpr' */
1617     long_u	b_p_fex_flags;	/* flags for 'formatexpr' */
1618 #endif
1619 #ifdef FEAT_CRYPT
1620     char_u	*b_p_key;	/* 'key' */
1621 #endif
1622     char_u	*b_p_kp;	/* 'keywordprg' */
1623 #ifdef FEAT_LISP
1624     int		b_p_lisp;	/* 'lisp' */
1625 #endif
1626     char_u	*b_p_mps;	/* 'matchpairs' */
1627     int		b_p_ml;		/* 'modeline' */
1628     int		b_p_ml_nobin;	/* b_p_ml saved for binary mode */
1629     int		b_p_ma;		/* 'modifiable' */
1630     char_u	*b_p_nf;	/* 'nrformats' */
1631     int		b_p_pi;		/* 'preserveindent' */
1632 #ifdef FEAT_TEXTOBJ
1633     char_u	*b_p_qe;	/* 'quoteescape' */
1634 #endif
1635     int		b_p_ro;		/* 'readonly' */
1636     long	b_p_sw;		/* 'shiftwidth' */
1637 #ifndef SHORT_FNAME
1638     int		b_p_sn;		/* 'shortname' */
1639 #endif
1640 #ifdef FEAT_SMARTINDENT
1641     int		b_p_si;		/* 'smartindent' */
1642 #endif
1643     long	b_p_sts;	/* 'softtabstop' */
1644     long	b_p_sts_nopaste; /* b_p_sts saved for paste mode */
1645 #ifdef FEAT_SEARCHPATH
1646     char_u	*b_p_sua;	/* 'suffixesadd' */
1647 #endif
1648     int		b_p_swf;	/* 'swapfile' */
1649 #ifdef FEAT_SYN_HL
1650     long	b_p_smc;	/* 'synmaxcol' */
1651     char_u	*b_p_syn;	/* 'syntax' */
1652 #endif
1653     long	b_p_ts;		/* 'tabstop' */
1654     int		b_p_tx;		/* 'textmode' */
1655     long	b_p_tw;		/* 'textwidth' */
1656     long	b_p_tw_nobin;	/* b_p_tw saved for binary mode */
1657     long	b_p_tw_nopaste;	/* b_p_tw saved for paste mode */
1658     long	b_p_wm;		/* 'wrapmargin' */
1659     long	b_p_wm_nobin;	/* b_p_wm saved for binary mode */
1660     long	b_p_wm_nopaste;	/* b_p_wm saved for paste mode */
1661 #ifdef FEAT_KEYMAP
1662     char_u	*b_p_keymap;	/* 'keymap' */
1663 #endif
1664 
1665     /* local values for options which are normally global */
1666 #ifdef FEAT_QUICKFIX
1667     char_u	*b_p_gp;	/* 'grepprg' local value */
1668     char_u	*b_p_mp;	/* 'makeprg' local value */
1669     char_u	*b_p_efm;	/* 'errorformat' local value */
1670 #endif
1671     char_u	*b_p_ep;	/* 'equalprg' local value */
1672     char_u	*b_p_path;	/* 'path' local value */
1673     int		b_p_ar;		/* 'autoread' local value */
1674     char_u	*b_p_tags;	/* 'tags' local value */
1675 #ifdef FEAT_INS_EXPAND
1676     char_u	*b_p_dict;	/* 'dictionary' local value */
1677     char_u	*b_p_tsr;	/* 'thesaurus' local value */
1678 #endif
1679     long	b_p_ul;		/* 'undolevels' local value */
1680 #ifdef FEAT_PERSISTENT_UNDO
1681     int		b_p_udf;	/* 'undofile' */
1682 #endif
1683 #ifdef FEAT_LISP
1684     char_u	*b_p_lw;	/* 'lispwords' local value */
1685 #endif
1686 
1687     /* end of buffer options */
1688 
1689 #ifdef FEAT_CINDENT
1690     /* values set from b_p_cino */
1691     int		b_ind_level;
1692     int		b_ind_open_imag;
1693     int		b_ind_no_brace;
1694     int		b_ind_first_open;
1695     int		b_ind_open_extra;
1696     int		b_ind_close_extra;
1697     int		b_ind_open_left_imag;
1698     int		b_ind_jump_label;
1699     int		b_ind_case;
1700     int		b_ind_case_code;
1701     int		b_ind_case_break;
1702     int		b_ind_param;
1703     int		b_ind_func_type;
1704     int		b_ind_comment;
1705     int		b_ind_in_comment;
1706     int		b_ind_in_comment2;
1707     int		b_ind_cpp_baseclass;
1708     int		b_ind_continuation;
1709     int		b_ind_unclosed;
1710     int		b_ind_unclosed2;
1711     int		b_ind_unclosed_noignore;
1712     int		b_ind_unclosed_wrapped;
1713     int		b_ind_unclosed_whiteok;
1714     int		b_ind_matching_paren;
1715     int		b_ind_paren_prev;
1716     int		b_ind_maxparen;
1717     int		b_ind_maxcomment;
1718     int		b_ind_scopedecl;
1719     int		b_ind_scopedecl_code;
1720     int		b_ind_java;
1721     int		b_ind_js;
1722     int		b_ind_keep_case_label;
1723     int		b_ind_hash_comment;
1724     int		b_ind_cpp_namespace;
1725     int		b_ind_if_for_while;
1726 #endif
1727 
1728     linenr_T	b_no_eol_lnum;	/* non-zero lnum when last line of next binary
1729 				 * write should not have an end-of-line */
1730 
1731     int		b_start_eol;	/* last line had eol when it was read */
1732     int		b_start_ffc;	/* first char of 'ff' when edit started */
1733 #ifdef FEAT_MBYTE
1734     char_u	*b_start_fenc;	/* 'fileencoding' when edit started or NULL */
1735     int		b_bad_char;	/* "++bad=" argument when edit started or 0 */
1736     int		b_start_bomb;	/* 'bomb' when it was read */
1737 #endif
1738 
1739 #ifdef FEAT_EVAL
1740     dictitem_T	b_bufvar;	/* variable for "b:" Dictionary */
1741     dict_T	*b_vars;	/* internal variables, local to buffer */
1742 #endif
1743 
1744 #if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
1745     char_u	*b_p_bexpr;	/* 'balloonexpr' local value */
1746     long_u	b_p_bexpr_flags;/* flags for 'balloonexpr' */
1747 #endif
1748 #ifdef FEAT_CRYPT
1749     char_u	*b_p_cm;	/* 'cryptmethod' */
1750 #endif
1751 
1752     /* When a buffer is created, it starts without a swap file.  b_may_swap is
1753      * then set to indicate that a swap file may be opened later.  It is reset
1754      * if a swap file could not be opened.
1755      */
1756     int		b_may_swap;
1757     int		b_did_warn;	/* Set to 1 if user has been warned on first
1758 				   change of a read-only file */
1759 
1760     /* Two special kinds of buffers:
1761      * help buffer  - used for help files, won't use a swap file.
1762      * spell buffer - used for spell info, never displayed and doesn't have a
1763      *		      file name.
1764      */
1765     int		b_help;		/* TRUE for help file buffer (when set b_p_bt
1766 				   is "help") */
1767 #ifdef FEAT_SPELL
1768     int		b_spell;	/* TRUE for a spell file buffer, most fields
1769 				   are not used!  Use the B_SPELL macro to
1770 				   access b_spell without #ifdef. */
1771 #endif
1772 
1773 #ifndef SHORT_FNAME
1774     int		b_shortname;	/* this file has an 8.3 file name */
1775 #endif
1776 
1777 #ifdef FEAT_MZSCHEME
1778     void	*b_mzscheme_ref; /* The MzScheme reference to this buffer */
1779 #endif
1780 
1781 #ifdef FEAT_PERL
1782     void	*b_perl_private;
1783 #endif
1784 
1785 #ifdef FEAT_PYTHON
1786     void	*b_python_ref;	/* The Python reference to this buffer */
1787 #endif
1788 
1789 #ifdef FEAT_PYTHON3
1790     void	*b_python3_ref;	/* The Python3 reference to this buffer */
1791 #endif
1792 
1793 #ifdef FEAT_TCL
1794     void	*b_tcl_ref;
1795 #endif
1796 
1797 #ifdef FEAT_RUBY
1798     void	*b_ruby_ref;
1799 #endif
1800 
1801 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
1802     synblock_T	b_s;		/* Info related to syntax highlighting.  w_s
1803 				 * normally points to this, but some windows
1804 				 * may use a different synblock_T. */
1805 #endif
1806 
1807 #ifdef FEAT_SIGNS
1808     signlist_T	*b_signlist;	/* list of signs to draw */
1809 # ifdef FEAT_NETBEANS_INTG
1810     int		b_has_sign_column; /* Flag that is set when a first sign is
1811 				    * added and remains set until the end of
1812 				    * the netbeans session. */
1813 # endif
1814 #endif
1815 
1816 #ifdef FEAT_NETBEANS_INTG
1817     int		b_netbeans_file;    /* TRUE when buffer is owned by NetBeans */
1818     int		b_was_netbeans_file;/* TRUE if b_netbeans_file was once set */
1819 #endif
1820 
1821 #ifdef FEAT_CRYPT
1822     cryptstate_T *b_cryptstate;	/* Encryption state while reading or writing
1823 				 * the file. NULL when not using encryption. */
1824 #endif
1825     int		b_mapped_ctrl_c; /* modes where CTRL-C is mapped */
1826 
1827 }; /* file_buffer */
1828 
1829 
1830 #ifdef FEAT_DIFF
1831 /*
1832  * Stuff for diff mode.
1833  */
1834 # define DB_COUNT 4	/* up to four buffers can be diff'ed */
1835 
1836 /*
1837  * Each diffblock defines where a block of lines starts in each of the buffers
1838  * and how many lines it occupies in that buffer.  When the lines are missing
1839  * in the buffer the df_count[] is zero.  This is all counted in
1840  * buffer lines.
1841  * There is always at least one unchanged line in between the diffs.
1842  * Otherwise it would have been included in the diff above or below it.
1843  * df_lnum[] + df_count[] is the lnum below the change.  When in one buffer
1844  * lines have been inserted, in the other buffer df_lnum[] is the line below
1845  * the insertion and df_count[] is zero.  When appending lines at the end of
1846  * the buffer, df_lnum[] is one beyond the end!
1847  * This is using a linked list, because the number of differences is expected
1848  * to be reasonable small.  The list is sorted on lnum.
1849  */
1850 typedef struct diffblock_S diff_T;
1851 struct diffblock_S
1852 {
1853     diff_T	*df_next;
1854     linenr_T	df_lnum[DB_COUNT];	/* line number in buffer */
1855     linenr_T	df_count[DB_COUNT];	/* nr of inserted/changed lines */
1856 };
1857 #endif
1858 
1859 #define SNAP_HELP_IDX	0
1860 #ifdef FEAT_AUTOCMD
1861 # define SNAP_AUCMD_IDX 1
1862 # define SNAP_COUNT	2
1863 #else
1864 # define SNAP_COUNT	1
1865 #endif
1866 
1867 /*
1868  * Tab pages point to the top frame of each tab page.
1869  * Note: Most values are NOT valid for the current tab page!  Use "curwin",
1870  * "firstwin", etc. for that.  "tp_topframe" is always valid and can be
1871  * compared against "topframe" to find the current tab page.
1872  */
1873 typedef struct tabpage_S tabpage_T;
1874 struct tabpage_S
1875 {
1876     tabpage_T	    *tp_next;	    /* next tabpage or NULL */
1877     frame_T	    *tp_topframe;   /* topframe for the windows */
1878     win_T	    *tp_curwin;	    /* current window in this Tab page */
1879     win_T	    *tp_prevwin;    /* previous window in this Tab page */
1880     win_T	    *tp_firstwin;   /* first window in this Tab page */
1881     win_T	    *tp_lastwin;    /* last window in this Tab page */
1882     long	    tp_old_Rows;    /* Rows when Tab page was left */
1883     long	    tp_old_Columns; /* Columns when Tab page was left */
1884     long	    tp_ch_used;	    /* value of 'cmdheight' when frame size
1885 				       was set */
1886 #ifdef FEAT_GUI
1887     int		    tp_prev_which_scrollbars[3];
1888 				    /* previous value of which_scrollbars */
1889 #endif
1890 #ifdef FEAT_DIFF
1891     diff_T	    *tp_first_diff;
1892     buf_T	    *(tp_diffbuf[DB_COUNT]);
1893     int		    tp_diff_invalid;	/* list of diffs is outdated */
1894 #endif
1895     frame_T	    *(tp_snapshot[SNAP_COUNT]);  /* window layout snapshots */
1896 #ifdef FEAT_EVAL
1897     dictitem_T	    tp_winvar;	    /* variable for "t:" Dictionary */
1898     dict_T	    *tp_vars;	    /* internal variables, local to tab page */
1899 #endif
1900 
1901 #ifdef FEAT_PYTHON
1902     void	    *tp_python_ref;	/* The Python value for this tab page */
1903 #endif
1904 
1905 #ifdef FEAT_PYTHON3
1906     void	    *tp_python3_ref;	/* The Python value for this tab page */
1907 #endif
1908 };
1909 
1910 /*
1911  * Structure to cache info for displayed lines in w_lines[].
1912  * Each logical line has one entry.
1913  * The entry tells how the logical line is currently displayed in the window.
1914  * This is updated when displaying the window.
1915  * When the display is changed (e.g., when clearing the screen) w_lines_valid
1916  * is changed to exclude invalid entries.
1917  * When making changes to the buffer, wl_valid is reset to indicate wl_size
1918  * may not reflect what is actually in the buffer.  When wl_valid is FALSE,
1919  * the entries can only be used to count the number of displayed lines used.
1920  * wl_lnum and wl_lastlnum are invalid too.
1921  */
1922 typedef struct w_line
1923 {
1924     linenr_T	wl_lnum;	/* buffer line number for logical line */
1925     short_u	wl_size;	/* height in screen lines */
1926     char	wl_valid;	/* TRUE values are valid for text in buffer */
1927 #ifdef FEAT_FOLDING
1928     char	wl_folded;	/* TRUE when this is a range of folded lines */
1929     linenr_T	wl_lastlnum;	/* last buffer line number for logical line */
1930 #endif
1931 } wline_T;
1932 
1933 /*
1934  * Windows are kept in a tree of frames.  Each frame has a column (FR_COL)
1935  * or row (FR_ROW) layout or is a leaf, which has a window.
1936  */
1937 struct frame_S
1938 {
1939     char	fr_layout;	/* FR_LEAF, FR_COL or FR_ROW */
1940 #ifdef FEAT_VERTSPLIT
1941     int		fr_width;
1942     int		fr_newwidth;	/* new width used in win_equal_rec() */
1943 #endif
1944     int		fr_height;
1945     int		fr_newheight;	/* new height used in win_equal_rec() */
1946     frame_T	*fr_parent;	/* containing frame or NULL */
1947     frame_T	*fr_next;	/* frame right or below in same parent, NULL
1948 				   for first */
1949     frame_T	*fr_prev;	/* frame left or above in same parent, NULL
1950 				   for last */
1951     /* fr_child and fr_win are mutually exclusive */
1952     frame_T	*fr_child;	/* first contained frame */
1953     win_T	*fr_win;	/* window that fills this frame */
1954 };
1955 
1956 #define FR_LEAF	0	/* frame is a leaf */
1957 #define FR_ROW	1	/* frame with a row of windows */
1958 #define FR_COL	2	/* frame with a column of windows */
1959 
1960 /*
1961  * Struct used for highlighting 'hlsearch' matches, matches defined by
1962  * ":match" and matches defined by match functions.
1963  * For 'hlsearch' there is one pattern for all windows.  For ":match" and the
1964  * match functions there is a different pattern for each window.
1965  */
1966 typedef struct
1967 {
1968     regmmatch_T	rm;	/* points to the regexp program; contains last found
1969 			   match (may continue in next line) */
1970     buf_T	*buf;	/* the buffer to search for a match */
1971     linenr_T	lnum;	/* the line to search for a match */
1972     int		attr;	/* attributes to be used for a match */
1973     int		attr_cur; /* attributes currently active in win_line() */
1974     linenr_T	first_lnum;	/* first lnum to search for multi-line pat */
1975     colnr_T	startcol; /* in win_line() points to char where HL starts */
1976     colnr_T	endcol;	 /* in win_line() points to char where HL ends */
1977 #ifdef FEAT_RELTIME
1978     proftime_T	tm;	/* for a time limit */
1979 #endif
1980 } match_T;
1981 
1982 /* number of positions supported by matchaddpos() */
1983 #define MAXPOSMATCH 8
1984 
1985 /*
1986  * Same as lpos_T, but with additional field len.
1987  */
1988 typedef struct
1989 {
1990     linenr_T	lnum;	/* line number */
1991     colnr_T	col;	/* column number */
1992     int		len;	/* length: 0 - to the end of line */
1993 } llpos_T;
1994 
1995 /*
1996  * posmatch_T provides an array for storing match items for matchaddpos()
1997  * function.
1998  */
1999 typedef struct posmatch posmatch_T;
2000 struct posmatch
2001 {
2002     llpos_T	pos[MAXPOSMATCH];	/* array of positions */
2003     int		cur;			/* internal position counter */
2004     linenr_T	toplnum;		/* top buffer line */
2005     linenr_T	botlnum;		/* bottom buffer line */
2006 };
2007 
2008 /*
2009  * matchitem_T provides a linked list for storing match items for ":match" and
2010  * the match functions.
2011  */
2012 typedef struct matchitem matchitem_T;
2013 struct matchitem
2014 {
2015     matchitem_T	*next;
2016     int		id;	    /* match ID */
2017     int		priority;   /* match priority */
2018     char_u	*pattern;   /* pattern to highlight */
2019     int		hlg_id;	    /* highlight group ID */
2020     regmmatch_T	match;	    /* regexp program for pattern */
2021     posmatch_T	pos;	    /* position matches */
2022     match_T	hl;	    /* struct for doing the actual highlighting */
2023 };
2024 
2025 /*
2026  * Structure which contains all information that belongs to a window
2027  *
2028  * All row numbers are relative to the start of the window, except w_winrow.
2029  */
2030 struct window_S
2031 {
2032     buf_T	*w_buffer;	    /* buffer we are a window into (used
2033 				       often, keep it the first item!) */
2034 
2035 #if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
2036     synblock_T	*w_s;		    /* for :ownsyntax */
2037 #endif
2038 
2039 #ifdef FEAT_WINDOWS
2040     win_T	*w_prev;	    /* link to previous window */
2041     win_T	*w_next;	    /* link to next window */
2042 #endif
2043 #ifdef FEAT_AUTOCMD
2044     int		w_closing;	    /* window is being closed, don't let
2045 				       autocommands close it too. */
2046 #endif
2047 
2048     frame_T	*w_frame;	    /* frame containing this window */
2049 
2050     pos_T	w_cursor;	    /* cursor position in buffer */
2051 
2052     colnr_T	w_curswant;	    /* The column we'd like to be at.  This is
2053 				       used to try to stay in the same column
2054 				       for up/down cursor motions. */
2055 
2056     int		w_set_curswant;	    /* If set, then update w_curswant the next
2057 				       time through cursupdate() to the
2058 				       current virtual column */
2059 
2060     /*
2061      * the next six are used to update the visual part
2062      */
2063     char	w_old_visual_mode;  /* last known VIsual_mode */
2064     linenr_T	w_old_cursor_lnum;  /* last known end of visual part */
2065     colnr_T	w_old_cursor_fcol;  /* first column for block visual part */
2066     colnr_T	w_old_cursor_lcol;  /* last column for block visual part */
2067     linenr_T	w_old_visual_lnum;  /* last known start of visual part */
2068     colnr_T	w_old_visual_col;   /* last known start of visual part */
2069     colnr_T	w_old_curswant;	    /* last known value of Curswant */
2070 
2071     /*
2072      * "w_topline", "w_leftcol" and "w_skipcol" specify the offsets for
2073      * displaying the buffer.
2074      */
2075     linenr_T	w_topline;	    /* buffer line number of the line at the
2076 				       top of the window */
2077 #ifdef FEAT_AUTOCMD
2078     char	w_topline_was_set;  /* flag set to TRUE when topline is set,
2079 				       e.g. by winrestview() */
2080 #endif
2081 #ifdef FEAT_DIFF
2082     int		w_topfill;	    /* number of filler lines above w_topline */
2083     int		w_old_topfill;	    /* w_topfill at last redraw */
2084     int		w_botfill;	    /* TRUE when filler lines are actually
2085 				       below w_topline (at end of file) */
2086     int		w_old_botfill;	    /* w_botfill at last redraw */
2087 #endif
2088     colnr_T	w_leftcol;	    /* window column number of the left most
2089 				       character in the window; used when
2090 				       'wrap' is off */
2091     colnr_T	w_skipcol;	    /* starting column when a single line
2092 				       doesn't fit in the window */
2093 
2094     /*
2095      * Layout of the window in the screen.
2096      * May need to add "msg_scrolled" to "w_winrow" in rare situations.
2097      */
2098 #ifdef FEAT_WINDOWS
2099     int		w_winrow;	    /* first row of window in screen */
2100 #endif
2101     int		w_height;	    /* number of rows in window, excluding
2102 				       status/command line(s) */
2103 #ifdef FEAT_WINDOWS
2104     int		w_status_height;    /* number of status lines (0 or 1) */
2105 #endif
2106 #ifdef FEAT_VERTSPLIT
2107     int		w_wincol;	    /* Leftmost column of window in screen.
2108 				       use W_WINCOL() */
2109     int		w_width;	    /* Width of window, excluding separation.
2110 				       use W_WIDTH() */
2111     int		w_vsep_width;	    /* Number of separator columns (0 or 1).
2112 				       use W_VSEP_WIDTH() */
2113 #endif
2114 
2115     /*
2116      * === start of cached values ====
2117      */
2118     /*
2119      * Recomputing is minimized by storing the result of computations.
2120      * Use functions in screen.c to check if they are valid and to update.
2121      * w_valid is a bitfield of flags, which indicate if specific values are
2122      * valid or need to be recomputed.	See screen.c for values.
2123      */
2124     int		w_valid;
2125     pos_T	w_valid_cursor;	    /* last known position of w_cursor, used
2126 				       to adjust w_valid */
2127     colnr_T	w_valid_leftcol;    /* last known w_leftcol */
2128 
2129     /*
2130      * w_cline_height is the number of physical lines taken by the buffer line
2131      * that the cursor is on.  We use this to avoid extra calls to plines().
2132      */
2133     int		w_cline_height;	    /* current size of cursor line */
2134 #ifdef FEAT_FOLDING
2135     int		w_cline_folded;	    /* cursor line is folded */
2136 #endif
2137 
2138     int		w_cline_row;	    /* starting row of the cursor line */
2139 
2140     colnr_T	w_virtcol;	    /* column number of the cursor in the
2141 				       buffer line, as opposed to the column
2142 				       number we're at on the screen.  This
2143 				       makes a difference on lines which span
2144 				       more than one screen line or when
2145 				       w_leftcol is non-zero */
2146 
2147     /*
2148      * w_wrow and w_wcol specify the cursor position in the window.
2149      * This is related to positions in the window, not in the display or
2150      * buffer, thus w_wrow is relative to w_winrow.
2151      */
2152     int		w_wrow, w_wcol;	    /* cursor position in window */
2153 
2154     linenr_T	w_botline;	    /* number of the line below the bottom of
2155 				       the screen */
2156     int		w_empty_rows;	    /* number of ~ rows in window */
2157 #ifdef FEAT_DIFF
2158     int		w_filler_rows;	    /* number of filler rows at the end of the
2159 				       window */
2160 #endif
2161 
2162     /*
2163      * Info about the lines currently in the window is remembered to avoid
2164      * recomputing it every time.  The allocated size of w_lines[] is Rows.
2165      * Only the w_lines_valid entries are actually valid.
2166      * When the display is up-to-date w_lines[0].wl_lnum is equal to w_topline
2167      * and w_lines[w_lines_valid - 1].wl_lnum is equal to w_botline.
2168      * Between changing text and updating the display w_lines[] represents
2169      * what is currently displayed.  wl_valid is reset to indicated this.
2170      * This is used for efficient redrawing.
2171      */
2172     int		w_lines_valid;	    /* number of valid entries */
2173     wline_T	*w_lines;
2174 
2175 #ifdef FEAT_FOLDING
2176     garray_T	w_folds;	    /* array of nested folds */
2177     char	w_fold_manual;	    /* when TRUE: some folds are opened/closed
2178 				       manually */
2179     char	w_foldinvalid;	    /* when TRUE: folding needs to be
2180 				       recomputed */
2181 #endif
2182 #ifdef FEAT_LINEBREAK
2183     int		w_nrwidth;	    /* width of 'number' and 'relativenumber'
2184 				       column being used */
2185 #endif
2186 
2187     /*
2188      * === end of cached values ===
2189      */
2190 
2191     int		w_redr_type;	    /* type of redraw to be performed on win */
2192     int		w_upd_rows;	    /* number of window lines to update when
2193 				       w_redr_type is REDRAW_TOP */
2194     linenr_T	w_redraw_top;	    /* when != 0: first line needing redraw */
2195     linenr_T	w_redraw_bot;	    /* when != 0: last line needing redraw */
2196 #ifdef FEAT_WINDOWS
2197     int		w_redr_status;	    /* if TRUE status line must be redrawn */
2198 #endif
2199 
2200 #ifdef FEAT_CMDL_INFO
2201     /* remember what is shown in the ruler for this window (if 'ruler' set) */
2202     pos_T	w_ru_cursor;	    /* cursor position shown in ruler */
2203     colnr_T	w_ru_virtcol;	    /* virtcol shown in ruler */
2204     linenr_T	w_ru_topline;	    /* topline shown in ruler */
2205     linenr_T	w_ru_line_count;    /* line count used for ruler */
2206 # ifdef FEAT_DIFF
2207     int		w_ru_topfill;	    /* topfill shown in ruler */
2208 # endif
2209     char	w_ru_empty;	    /* TRUE if ruler shows 0-1 (empty line) */
2210 #endif
2211 
2212     int		w_alt_fnum;	    /* alternate file (for # and CTRL-^) */
2213 
2214 #ifdef FEAT_WINDOWS
2215     alist_T	*w_alist;	    /* pointer to arglist for this window */
2216 #endif
2217     int		w_arg_idx;	    /* current index in argument list (can be
2218 				       out of range!) */
2219     int		w_arg_idx_invalid;  /* editing another file than w_arg_idx */
2220 
2221     char_u	*w_localdir;	    /* absolute path of local directory or
2222 				       NULL */
2223     /*
2224      * Options local to a window.
2225      * They are local because they influence the layout of the window or
2226      * depend on the window layout.
2227      * There are two values: w_onebuf_opt is local to the buffer currently in
2228      * this window, w_allbuf_opt is for all buffers in this window.
2229      */
2230     winopt_T	w_onebuf_opt;
2231     winopt_T	w_allbuf_opt;
2232 
2233     /* A few options have local flags for P_INSECURE. */
2234 #ifdef FEAT_STL_OPT
2235     long_u	w_p_stl_flags;	    /* flags for 'statusline' */
2236 #endif
2237 #ifdef FEAT_EVAL
2238     long_u	w_p_fde_flags;	    /* flags for 'foldexpr' */
2239     long_u	w_p_fdt_flags;	    /* flags for 'foldtext' */
2240 #endif
2241 #ifdef FEAT_SYN_HL
2242     int		*w_p_cc_cols;	    /* array of columns to highlight or NULL */
2243 #endif
2244 #ifdef FEAT_LINEBREAK
2245     int		w_p_brimin;	    /* minimum width for breakindent */
2246     int		w_p_brishift;	    /* additional shift for breakindent */
2247     int		w_p_brisbr;	    /* sbr in 'briopt' */
2248 #endif
2249 
2250     /* transform a pointer to a "onebuf" option into a "allbuf" option */
2251 #define GLOBAL_WO(p)	((char *)p + sizeof(winopt_T))
2252 
2253 #ifdef FEAT_SCROLLBIND
2254     long	w_scbind_pos;
2255 #endif
2256 
2257 #ifdef FEAT_EVAL
2258     dictitem_T	w_winvar;	/* variable for "w:" Dictionary */
2259     dict_T	*w_vars;	/* internal variables, local to window */
2260 #endif
2261 
2262 #if defined(FEAT_RIGHTLEFT) && defined(FEAT_FKMAP)
2263     int		w_farsi;	/* for the window dependent Farsi functions */
2264 #endif
2265 
2266     /*
2267      * The w_prev_pcmark field is used to check whether we really did jump to
2268      * a new line after setting the w_pcmark.  If not, then we revert to
2269      * using the previous w_pcmark.
2270      */
2271     pos_T	w_pcmark;	/* previous context mark */
2272     pos_T	w_prev_pcmark;	/* previous w_pcmark */
2273 
2274 #ifdef FEAT_JUMPLIST
2275     /*
2276      * the jumplist contains old cursor positions
2277      */
2278     xfmark_T	w_jumplist[JUMPLISTSIZE];
2279     int		w_jumplistlen;		/* number of active entries */
2280     int		w_jumplistidx;		/* current position */
2281 
2282     int		w_changelistidx;	/* current position in b_changelist */
2283 #endif
2284 
2285 #ifdef FEAT_SEARCH_EXTRA
2286     matchitem_T	*w_match_head;		/* head of match list */
2287     int		w_next_match_id;	/* next match ID */
2288 #endif
2289 
2290     /*
2291      * the tagstack grows from 0 upwards:
2292      * entry 0: older
2293      * entry 1: newer
2294      * entry 2: newest
2295      */
2296     taggy_T	w_tagstack[TAGSTACKSIZE];	/* the tag stack */
2297     int		w_tagstackidx;		/* idx just below active entry */
2298     int		w_tagstacklen;		/* number of tags on stack */
2299 
2300     /*
2301      * w_fraction is the fractional row of the cursor within the window, from
2302      * 0 at the top row to FRACTION_MULT at the last row.
2303      * w_prev_fraction_row was the actual cursor row when w_fraction was last
2304      * calculated.
2305      */
2306     int		w_fraction;
2307     int		w_prev_fraction_row;
2308 
2309 #ifdef FEAT_GUI
2310     scrollbar_T	w_scrollbars[2];	/* vert. Scrollbars for this window */
2311 #endif
2312 #ifdef FEAT_LINEBREAK
2313     linenr_T	w_nrwidth_line_count;	/* line count when ml_nrwidth_width
2314 					 * was computed. */
2315     long	w_nuw_cached;		/* 'numberwidth' option cached */
2316     int		w_nrwidth_width;	/* nr of chars to print line count. */
2317 #endif
2318 
2319 #ifdef FEAT_QUICKFIX
2320     qf_info_T	*w_llist;		/* Location list for this window */
2321     /*
2322      * Location list reference used in the location list window.
2323      * In a non-location list window, w_llist_ref is NULL.
2324      */
2325     qf_info_T	*w_llist_ref;
2326 #endif
2327 
2328 
2329 #ifdef FEAT_MZSCHEME
2330     void	*w_mzscheme_ref;	/* The MzScheme value for this window */
2331 #endif
2332 
2333 #ifdef FEAT_PERL
2334     void	*w_perl_private;
2335 #endif
2336 
2337 #ifdef FEAT_PYTHON
2338     void	*w_python_ref;		/* The Python value for this window */
2339 #endif
2340 
2341 #ifdef FEAT_PYTHON3
2342     void	*w_python3_ref;		/* The Python value for this window */
2343 #endif
2344 
2345 #ifdef FEAT_TCL
2346     void	*w_tcl_ref;
2347 #endif
2348 
2349 #ifdef FEAT_RUBY
2350     void	*w_ruby_ref;
2351 #endif
2352 };
2353 
2354 /*
2355  * Arguments for operators.
2356  */
2357 typedef struct oparg_S
2358 {
2359     int		op_type;	/* current pending operator type */
2360     int		regname;	/* register to use for the operator */
2361     int		motion_type;	/* type of the current cursor motion */
2362     int		motion_force;	/* force motion type: 'v', 'V' or CTRL-V */
2363     int		use_reg_one;	/* TRUE if delete uses reg 1 even when not
2364 				   linewise */
2365     int		inclusive;	/* TRUE if char motion is inclusive (only
2366 				   valid when motion_type is MCHAR */
2367     int		end_adjusted;	/* backuped b_op_end one char (only used by
2368 				   do_format()) */
2369     pos_T	start;		/* start of the operator */
2370     pos_T	end;		/* end of the operator */
2371     pos_T	cursor_start;	/* cursor position before motion for "gw" */
2372 
2373     long	line_count;	/* number of lines from op_start to op_end
2374 				   (inclusive) */
2375     int		empty;		/* op_start and op_end the same (only used by
2376 				   do_change()) */
2377     int		is_VIsual;	/* operator on Visual area */
2378     int		block_mode;	/* current operator is Visual block mode */
2379     colnr_T	start_vcol;	/* start col for block mode operator */
2380     colnr_T	end_vcol;	/* end col for block mode operator */
2381 #ifdef FEAT_AUTOCMD
2382     long	prev_opcount;	/* ca.opcount saved for K_CURSORHOLD */
2383     long	prev_count0;	/* ca.count0 saved for K_CURSORHOLD */
2384 #endif
2385 } oparg_T;
2386 
2387 /*
2388  * Arguments for Normal mode commands.
2389  */
2390 typedef struct cmdarg_S
2391 {
2392     oparg_T	*oap;		/* Operator arguments */
2393     int		prechar;	/* prefix character (optional, always 'g') */
2394     int		cmdchar;	/* command character */
2395     int		nchar;		/* next command character (optional) */
2396 #ifdef FEAT_MBYTE
2397     int		ncharC1;	/* first composing character (optional) */
2398     int		ncharC2;	/* second composing character (optional) */
2399 #endif
2400     int		extra_char;	/* yet another character (optional) */
2401     long	opcount;	/* count before an operator */
2402     long	count0;		/* count before command, default 0 */
2403     long	count1;		/* count before command, default 1 */
2404     int		arg;		/* extra argument from nv_cmds[] */
2405     int		retval;		/* return: CA_* values */
2406     char_u	*searchbuf;	/* return: pointer to search pattern or NULL */
2407 } cmdarg_T;
2408 
2409 /* values for retval: */
2410 #define CA_COMMAND_BUSY	    1	/* skip restarting edit() once */
2411 #define CA_NO_ADJ_OP_END    2	/* don't adjust operator end */
2412 
2413 #ifdef CURSOR_SHAPE
2414 /*
2415  * struct to store values from 'guicursor' and 'mouseshape'
2416  */
2417 /* Indexes in shape_table[] */
2418 #define SHAPE_IDX_N	0	/* Normal mode */
2419 #define SHAPE_IDX_V	1	/* Visual mode */
2420 #define SHAPE_IDX_I	2	/* Insert mode */
2421 #define SHAPE_IDX_R	3	/* Replace mode */
2422 #define SHAPE_IDX_C	4	/* Command line Normal mode */
2423 #define SHAPE_IDX_CI	5	/* Command line Insert mode */
2424 #define SHAPE_IDX_CR	6	/* Command line Replace mode */
2425 #define SHAPE_IDX_O	7	/* Operator-pending mode */
2426 #define SHAPE_IDX_VE	8	/* Visual mode with 'selection' exclusive */
2427 #define SHAPE_IDX_CLINE	9	/* On command line */
2428 #define SHAPE_IDX_STATUS 10	/* A status line */
2429 #define SHAPE_IDX_SDRAG 11	/* dragging a status line */
2430 #define SHAPE_IDX_VSEP	12	/* A vertical separator line */
2431 #define SHAPE_IDX_VDRAG 13	/* dragging a vertical separator line */
2432 #define SHAPE_IDX_MORE	14	/* Hit-return or More */
2433 #define SHAPE_IDX_MOREL	15	/* Hit-return or More in last line */
2434 #define SHAPE_IDX_SM	16	/* showing matching paren */
2435 #define SHAPE_IDX_COUNT	17
2436 
2437 #define SHAPE_BLOCK	0	/* block cursor */
2438 #define SHAPE_HOR	1	/* horizontal bar cursor */
2439 #define SHAPE_VER	2	/* vertical bar cursor */
2440 
2441 #define MSHAPE_NUMBERED	1000	/* offset for shapes identified by number */
2442 #define MSHAPE_HIDE	1	/* hide mouse pointer */
2443 
2444 #define SHAPE_MOUSE	1	/* used for mouse pointer shape */
2445 #define SHAPE_CURSOR	2	/* used for text cursor shape */
2446 
2447 typedef struct cursor_entry
2448 {
2449     int		shape;		/* one of the SHAPE_ defines */
2450     int		mshape;		/* one of the MSHAPE defines */
2451     int		percentage;	/* percentage of cell for bar */
2452     long	blinkwait;	/* blinking, wait time before blinking starts */
2453     long	blinkon;	/* blinking, on time */
2454     long	blinkoff;	/* blinking, off time */
2455     int		id;		/* highlight group ID */
2456     int		id_lm;		/* highlight group ID for :lmap mode */
2457     char	*name;		/* mode name (fixed) */
2458     char	used_for;	/* SHAPE_MOUSE and/or SHAPE_CURSOR */
2459 } cursorentry_T;
2460 #endif /* CURSOR_SHAPE */
2461 
2462 #ifdef FEAT_MENU
2463 
2464 /* Indices into vimmenu_T->strings[] and vimmenu_T->noremap[] for each mode */
2465 #define MENU_INDEX_INVALID	-1
2466 #define MENU_INDEX_NORMAL	0
2467 #define MENU_INDEX_VISUAL	1
2468 #define MENU_INDEX_SELECT	2
2469 #define MENU_INDEX_OP_PENDING	3
2470 #define MENU_INDEX_INSERT	4
2471 #define MENU_INDEX_CMDLINE	5
2472 #define MENU_INDEX_TIP		6
2473 #define MENU_MODES		7
2474 
2475 /* Menu modes */
2476 #define MENU_NORMAL_MODE	(1 << MENU_INDEX_NORMAL)
2477 #define MENU_VISUAL_MODE	(1 << MENU_INDEX_VISUAL)
2478 #define MENU_SELECT_MODE	(1 << MENU_INDEX_SELECT)
2479 #define MENU_OP_PENDING_MODE	(1 << MENU_INDEX_OP_PENDING)
2480 #define MENU_INSERT_MODE	(1 << MENU_INDEX_INSERT)
2481 #define MENU_CMDLINE_MODE	(1 << MENU_INDEX_CMDLINE)
2482 #define MENU_TIP_MODE		(1 << MENU_INDEX_TIP)
2483 #define MENU_ALL_MODES		((1 << MENU_INDEX_TIP) - 1)
2484 /*note MENU_INDEX_TIP is not a 'real' mode*/
2485 
2486 /* Start a menu name with this to not include it on the main menu bar */
2487 #define MNU_HIDDEN_CHAR		']'
2488 
2489 typedef struct VimMenu vimmenu_T;
2490 
2491 struct VimMenu
2492 {
2493     int		modes;		    /* Which modes is this menu visible for? */
2494     int		enabled;	    /* for which modes the menu is enabled */
2495     char_u	*name;		    /* Name of menu, possibly translated */
2496     char_u	*dname;		    /* Displayed Name ("name" without '&') */
2497 #ifdef FEAT_MULTI_LANG
2498     char_u	*en_name;	    /* "name" untranslated, NULL when "name"
2499 				     * was not translated */
2500     char_u	*en_dname;	    /* "dname" untranslated, NULL when "dname"
2501 				     * was not translated */
2502 #endif
2503     int		mnemonic;	    /* mnemonic key (after '&') */
2504     char_u	*actext;	    /* accelerator text (after TAB) */
2505     int		priority;	    /* Menu order priority */
2506 #ifdef FEAT_GUI
2507     void	(*cb) __ARGS((vimmenu_T *));	    /* Call-back routine */
2508 #endif
2509 #ifdef FEAT_TOOLBAR
2510     char_u	*iconfile;	    /* name of file for icon or NULL */
2511     int		iconidx;	    /* icon index (-1 if not set) */
2512     int		icon_builtin;	    /* icon names is BuiltIn{nr} */
2513 #endif
2514     char_u	*strings[MENU_MODES]; /* Mapped string for each mode */
2515     int		noremap[MENU_MODES]; /* A REMAP_ flag for each mode */
2516     char	silent[MENU_MODES]; /* A silent flag for each mode */
2517     vimmenu_T	*children;	    /* Children of sub-menu */
2518     vimmenu_T	*parent;	    /* Parent of menu */
2519     vimmenu_T	*next;		    /* Next item in menu */
2520 #ifdef FEAT_GUI_X11
2521     Widget	id;		    /* Manage this to enable item */
2522     Widget	submenu_id;	    /* If this is submenu, add children here */
2523 #endif
2524 #ifdef FEAT_GUI_GTK
2525     GtkWidget	*id;		    /* Manage this to enable item */
2526     GtkWidget	*submenu_id;	    /* If this is submenu, add children here */
2527     GtkWidget	*tearoff_handle;
2528     GtkWidget   *label;		    /* Used by "set wak=" code. */
2529 #endif
2530 #ifdef FEAT_GUI_MOTIF
2531     int		sensitive;	    /* turn button on/off */
2532     char	**xpm;		    /* pixmap data */
2533     char	*xpm_fname;	    /* file with pixmap data */
2534 #endif
2535 #ifdef FEAT_GUI_ATHENA
2536     Pixmap	image;		    /* Toolbar image */
2537 #endif
2538 #ifdef FEAT_BEVAL_TIP
2539     BalloonEval *tip;		    /* tooltip for this menu item */
2540 #endif
2541 #ifdef FEAT_GUI_W16
2542     UINT	id;		    /* Id of menu item */
2543     HMENU	submenu_id;	    /* If this is submenu, add children here */
2544 #endif
2545 #ifdef FEAT_GUI_W32
2546     UINT	id;		    /* Id of menu item */
2547     HMENU	submenu_id;	    /* If this is submenu, add children here */
2548     HWND	tearoff_handle;	    /* hWnd of tearoff if created */
2549 #endif
2550 #ifdef FEAT_GUI_MAC
2551 /*  MenuHandle	id; */
2552 /*  short	index;	*/	    /* the item index within the father menu */
2553     short	menu_id;	    /* the menu id to which this item belong */
2554     short	submenu_id;	    /* the menu id of the children (could be
2555 				       get through some tricks) */
2556     MenuHandle	menu_handle;
2557     MenuHandle	submenu_handle;
2558 #endif
2559 #ifdef FEAT_GUI_PHOTON
2560     PtWidget_t	*id;
2561     PtWidget_t	*submenu_id;
2562 #endif
2563 };
2564 #else
2565 /* For generating prototypes when FEAT_MENU isn't defined. */
2566 typedef int vimmenu_T;
2567 
2568 #endif /* FEAT_MENU */
2569 
2570 /*
2571  * Struct to save values in before executing autocommands for a buffer that is
2572  * not the current buffer.  Without FEAT_AUTOCMD only "curbuf" is remembered.
2573  */
2574 typedef struct
2575 {
2576     buf_T	*save_curbuf;	/* saved curbuf */
2577 #ifdef FEAT_AUTOCMD
2578     int		use_aucmd_win;	/* using aucmd_win */
2579     win_T	*save_curwin;	/* saved curwin */
2580     win_T	*new_curwin;	/* new curwin */
2581     buf_T	*new_curbuf;	/* new curbuf */
2582     char_u	*globaldir;	/* saved value of globaldir */
2583 #endif
2584 } aco_save_T;
2585 
2586 /*
2587  * Generic option table item, only used for printer at the moment.
2588  */
2589 typedef struct
2590 {
2591     const char	*name;
2592     int		hasnum;
2593     long	number;
2594     char_u	*string;	/* points into option string */
2595     int		strlen;
2596     int		present;
2597 } option_table_T;
2598 
2599 /*
2600  * Structure to hold printing color and font attributes.
2601  */
2602 typedef struct
2603 {
2604     long_u	fg_color;
2605     long_u	bg_color;
2606     int		bold;
2607     int		italic;
2608     int		underline;
2609     int		undercurl;
2610 } prt_text_attr_T;
2611 
2612 /*
2613  * Structure passed back to the generic printer code.
2614  */
2615 typedef struct
2616 {
2617     int		n_collated_copies;
2618     int		n_uncollated_copies;
2619     int		duplex;
2620     int		chars_per_line;
2621     int		lines_per_page;
2622     int		has_color;
2623     prt_text_attr_T number;
2624 #ifdef FEAT_SYN_HL
2625     int		modec;
2626     int		do_syntax;
2627 #endif
2628     int		user_abort;
2629     char_u	*jobname;
2630 #ifdef FEAT_POSTSCRIPT
2631     char_u	*outfile;
2632     char_u	*arguments;
2633 #endif
2634 } prt_settings_T;
2635 
2636 #define PRINT_NUMBER_WIDTH 8
2637 
2638 /*
2639  * Used for popup menu items.
2640  */
2641 typedef struct
2642 {
2643     char_u	*pum_text;	/* main menu text */
2644     char_u	*pum_kind;	/* extra kind text (may be truncated) */
2645     char_u	*pum_extra;	/* extra menu text (may be truncated) */
2646     char_u	*pum_info;	/* extra info */
2647 } pumitem_T;
2648 
2649 /*
2650  * Structure used for get_tagfname().
2651  */
2652 typedef struct
2653 {
2654     char_u	*tn_tags;	/* value of 'tags' when starting */
2655     char_u	*tn_np;		/* current position in tn_tags */
2656     int		tn_did_filefind_init;
2657     int		tn_hf_idx;
2658     void	*tn_search_ctx;
2659 } tagname_T;
2660 
2661 /*
2662  * Array indexes used for cptext argument of ins_compl_add().
2663  */
2664 #define CPT_ABBR    0	/* "abbr" */
2665 #define CPT_MENU    1	/* "menu" */
2666 #define CPT_KIND    2	/* "kind" */
2667 #define CPT_INFO    3	/* "info" */
2668 #define CPT_COUNT   4	/* Number of entries */
2669 
2670 typedef struct {
2671   UINT32_T total[2];
2672   UINT32_T state[8];
2673   char_u   buffer[64];
2674 } context_sha256_T;
2675