Mercurial > vim
annotate src/memline.c @ 2172:9e265d9089fd vim73
updated for version 7.2.436
Problem: Reproducible crash in syntax HL. (George Reilly, Dominique Pelle)
Solution: Make sst_stacksize an int instead of short. (Dominique Pelle)
author | Bram Moolenaar <bram@vim.org> |
---|---|
date | Sun, 16 May 2010 13:56:06 +0200 |
parents | 0527eb0f6918 |
children | 733f0dc510c3 8c6a66e2b3cc |
rev | line source |
---|---|
7 | 1 /* vi:set ts=8 sts=4 sw=4: |
2 * | |
3 * VIM - Vi IMproved by Bram Moolenaar | |
4 * | |
5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
6 * Do ":help credits" in Vim to see a list of people who contributed. | |
7 * See README.txt for an overview of the Vim source code. | |
8 */ | |
9 | |
10 /* for debugging */ | |
11 /* #define CHECK(c, s) if (c) EMSG(s) */ | |
12 #define CHECK(c, s) | |
13 | |
14 /* | |
15 * memline.c: Contains the functions for appending, deleting and changing the | |
625 | 16 * text lines. The memfile functions are used to store the information in |
17 * blocks of memory, backed up by a file. The structure of the information is | |
18 * a tree. The root of the tree is a pointer block. The leaves of the tree | |
19 * are data blocks. In between may be several layers of pointer blocks, | |
20 * forming branches. | |
7 | 21 * |
22 * Three types of blocks are used: | |
23 * - Block nr 0 contains information for recovery | |
24 * - Pointer blocks contain list of pointers to other blocks. | |
25 * - Data blocks contain the actual text. | |
26 * | |
27 * Block nr 0 contains the block0 structure (see below). | |
28 * | |
29 * Block nr 1 is the first pointer block. It is the root of the tree. | |
30 * Other pointer blocks are branches. | |
31 * | |
32 * If a line is too big to fit in a single page, the block containing that | |
33 * line is made big enough to hold the line. It may span several pages. | |
34 * Otherwise all blocks are one page. | |
35 * | |
36 * A data block that was filled when starting to edit a file and was not | |
37 * changed since then, can have a negative block number. This means that it | |
38 * has not yet been assigned a place in the file. When recovering, the lines | |
39 * in this data block can be read from the original file. When the block is | |
40 * changed (lines appended/deleted/changed) or when it is flushed it gets a | |
41 * positive number. Use mf_trans_del() to get the new number, before calling | |
42 * mf_get(). | |
43 */ | |
44 | |
1668 | 45 #if defined(MSDOS) || defined(WIN16) || defined(WIN32) || defined(_WIN64) |
1624 | 46 # include "vimio.h" /* for mch_open(), must be before vim.h */ |
7 | 47 #endif |
48 | |
49 #include "vim.h" | |
50 | |
51 #ifndef UNIX /* it's in os_unix.h for Unix */ | |
52 # include <time.h> | |
53 #endif | |
54 | |
1030 | 55 #if defined(SASC) || defined(__amigaos4__) |
7 | 56 # include <proto/dos.h> /* for Open() and Close() */ |
57 #endif | |
58 | |
1030 | 59 #ifdef HAVE_ERRNO_H |
60 # include <errno.h> | |
61 #endif | |
62 | |
7 | 63 typedef struct block0 ZERO_BL; /* contents of the first block */ |
64 typedef struct pointer_block PTR_BL; /* contents of a pointer block */ | |
65 typedef struct data_block DATA_BL; /* contents of a data block */ | |
66 typedef struct pointer_entry PTR_EN; /* block/line-count pair */ | |
67 | |
68 #define DATA_ID (('d' << 8) + 'a') /* data block id */ | |
69 #define PTR_ID (('p' << 8) + 't') /* pointer block id */ | |
70 #define BLOCK0_ID0 'b' /* block 0 id 0 */ | |
71 #define BLOCK0_ID1 '0' /* block 0 id 1 */ | |
72 | |
73 /* | |
74 * pointer to a block, used in a pointer block | |
75 */ | |
76 struct pointer_entry | |
77 { | |
78 blocknr_T pe_bnum; /* block number */ | |
79 linenr_T pe_line_count; /* number of lines in this branch */ | |
80 linenr_T pe_old_lnum; /* lnum for this block (for recovery) */ | |
81 int pe_page_count; /* number of pages in block pe_bnum */ | |
82 }; | |
83 | |
84 /* | |
85 * A pointer block contains a list of branches in the tree. | |
86 */ | |
87 struct pointer_block | |
88 { | |
89 short_u pb_id; /* ID for pointer block: PTR_ID */ | |
90 short_u pb_count; /* number of pointer in this block */ | |
91 short_u pb_count_max; /* maximum value for pb_count */ | |
92 PTR_EN pb_pointer[1]; /* list of pointers to blocks (actually longer) | |
93 * followed by empty space until end of page */ | |
94 }; | |
95 | |
96 /* | |
97 * A data block is a leaf in the tree. | |
98 * | |
99 * The text of the lines is at the end of the block. The text of the first line | |
100 * in the block is put at the end, the text of the second line in front of it, | |
101 * etc. Thus the order of the lines is the opposite of the line number. | |
102 */ | |
103 struct data_block | |
104 { | |
105 short_u db_id; /* ID for data block: DATA_ID */ | |
106 unsigned db_free; /* free space available */ | |
107 unsigned db_txt_start; /* byte where text starts */ | |
108 unsigned db_txt_end; /* byte just after data block */ | |
109 linenr_T db_line_count; /* number of lines in this block */ | |
110 unsigned db_index[1]; /* index for start of line (actually bigger) | |
111 * followed by empty space upto db_txt_start | |
112 * followed by the text in the lines until | |
113 * end of page */ | |
114 }; | |
115 | |
116 /* | |
117 * The low bits of db_index hold the actual index. The topmost bit is | |
118 * used for the global command to be able to mark a line. | |
119 * This method is not clean, but otherwise there would be at least one extra | |
120 * byte used for each line. | |
121 * The mark has to be in this place to keep it with the correct line when other | |
122 * lines are inserted or deleted. | |
123 */ | |
124 #define DB_MARKED ((unsigned)1 << ((sizeof(unsigned) * 8) - 1)) | |
125 #define DB_INDEX_MASK (~DB_MARKED) | |
126 | |
127 #define INDEX_SIZE (sizeof(unsigned)) /* size of one db_index entry */ | |
128 #define HEADER_SIZE (sizeof(DATA_BL) - INDEX_SIZE) /* size of data block header */ | |
129 | |
39 | 130 #define B0_FNAME_SIZE_ORG 900 /* what it was in older versions */ |
131 #define B0_FNAME_SIZE 898 | |
132 #define B0_UNAME_SIZE 40 | |
133 #define B0_HNAME_SIZE 40 | |
7 | 134 /* |
135 * Restrict the numbers to 32 bits, otherwise most compilers will complain. | |
136 * This won't detect a 64 bit machine that only swaps a byte in the top 32 | |
137 * bits, but that is crazy anyway. | |
138 */ | |
139 #define B0_MAGIC_LONG 0x30313233L | |
140 #define B0_MAGIC_INT 0x20212223L | |
141 #define B0_MAGIC_SHORT 0x10111213L | |
142 #define B0_MAGIC_CHAR 0x55 | |
143 | |
144 /* | |
145 * Block zero holds all info about the swap file. | |
146 * | |
147 * NOTE: DEFINITION OF BLOCK 0 SHOULD NOT CHANGE! It would make all existing | |
148 * swap files unusable! | |
149 * | |
150 * If size of block0 changes anyway, adjust MIN_SWAP_PAGE_SIZE in vim.h!! | |
151 * | |
1228 | 152 * This block is built up of single bytes, to make it portable across |
7 | 153 * different machines. b0_magic_* is used to check the byte order and size of |
154 * variables, because the rest of the swap file is not portable. | |
155 */ | |
156 struct block0 | |
157 { | |
158 char_u b0_id[2]; /* id for block 0: BLOCK0_ID0 and BLOCK0_ID1 */ | |
159 char_u b0_version[10]; /* Vim version string */ | |
160 char_u b0_page_size[4];/* number of bytes per page */ | |
161 char_u b0_mtime[4]; /* last modification time of file */ | |
162 char_u b0_ino[4]; /* inode of b0_fname */ | |
163 char_u b0_pid[4]; /* process id of creator (or 0) */ | |
164 char_u b0_uname[B0_UNAME_SIZE]; /* name of user (uid if no name) */ | |
165 char_u b0_hname[B0_HNAME_SIZE]; /* host name (if it has a name) */ | |
39 | 166 char_u b0_fname[B0_FNAME_SIZE_ORG]; /* name of file being edited */ |
7 | 167 long b0_magic_long; /* check for byte order of long */ |
168 int b0_magic_int; /* check for byte order of int */ | |
169 short b0_magic_short; /* check for byte order of short */ | |
170 char_u b0_magic_char; /* check for last char */ | |
171 }; | |
39 | 172 |
173 /* | |
625 | 174 * Note: b0_dirty and b0_flags are put at the end of the file name. For very |
39 | 175 * long file names in older versions of Vim they are invalid. |
176 * The 'fileencoding' comes before b0_flags, with a NUL in front. But only | |
177 * when there is room, for very long file names it's omitted. | |
178 */ | |
179 #define B0_DIRTY 0x55 | |
180 #define b0_dirty b0_fname[B0_FNAME_SIZE_ORG-1] | |
181 | |
182 /* | |
183 * The b0_flags field is new in Vim 7.0. | |
184 */ | |
185 #define b0_flags b0_fname[B0_FNAME_SIZE_ORG-2] | |
186 | |
187 /* The lowest two bits contain the fileformat. Zero means it's not set | |
188 * (compatible with Vim 6.x), otherwise it's EOL_UNIX + 1, EOL_DOS + 1 or | |
189 * EOL_MAC + 1. */ | |
190 #define B0_FF_MASK 3 | |
191 | |
192 /* Swap file is in directory of edited file. Used to find the file from | |
193 * different mount points. */ | |
194 #define B0_SAME_DIR 4 | |
195 | |
196 /* The 'fileencoding' is at the end of b0_fname[], with a NUL in front of it. | |
197 * When empty there is only the NUL. */ | |
198 #define B0_HAS_FENC 8 | |
7 | 199 |
200 #define STACK_INCR 5 /* nr of entries added to ml_stack at a time */ | |
201 | |
202 /* | |
203 * The line number where the first mark may be is remembered. | |
204 * If it is 0 there are no marks at all. | |
205 * (always used for the current buffer only, no buffer change possible while | |
206 * executing a global command). | |
207 */ | |
208 static linenr_T lowest_marked = 0; | |
209 | |
210 /* | |
211 * arguments for ml_find_line() | |
212 */ | |
213 #define ML_DELETE 0x11 /* delete line */ | |
214 #define ML_INSERT 0x12 /* insert line */ | |
215 #define ML_FIND 0x13 /* just find the line */ | |
216 #define ML_FLUSH 0x02 /* flush locked block */ | |
217 #define ML_SIMPLE(x) (x & 0x10) /* DEL, INS or FIND */ | |
218 | |
944 | 219 static void ml_upd_block0 __ARGS((buf_T *buf, int set_fname)); |
7 | 220 static void set_b0_fname __ARGS((ZERO_BL *, buf_T *buf)); |
39 | 221 static void set_b0_dir_flag __ARGS((ZERO_BL *b0p, buf_T *buf)); |
222 #ifdef FEAT_MBYTE | |
223 static void add_b0_fenc __ARGS((ZERO_BL *b0p, buf_T *buf)); | |
224 #endif | |
7 | 225 static time_t swapfile_info __ARGS((char_u *)); |
226 static int recov_file_names __ARGS((char_u **, char_u *, int prepend_dot)); | |
227 static int ml_append_int __ARGS((buf_T *, linenr_T, char_u *, colnr_T, int, int)); | |
228 static int ml_delete_int __ARGS((buf_T *, linenr_T, int)); | |
229 static char_u *findswapname __ARGS((buf_T *, char_u **, char_u *)); | |
230 static void ml_flush_line __ARGS((buf_T *)); | |
231 static bhdr_T *ml_new_data __ARGS((memfile_T *, int, int)); | |
232 static bhdr_T *ml_new_ptr __ARGS((memfile_T *)); | |
233 static bhdr_T *ml_find_line __ARGS((buf_T *, linenr_T, int)); | |
234 static int ml_add_stack __ARGS((buf_T *)); | |
235 static void ml_lineadd __ARGS((buf_T *, int)); | |
236 static int b0_magic_wrong __ARGS((ZERO_BL *)); | |
237 #ifdef CHECK_INODE | |
238 static int fnamecmp_ino __ARGS((char_u *, char_u *, long)); | |
239 #endif | |
240 static void long_to_char __ARGS((long, char_u *)); | |
241 static long char_to_long __ARGS((char_u *)); | |
242 #if defined(UNIX) || defined(WIN3264) | |
243 static char_u *make_percent_swname __ARGS((char_u *dir, char_u *name)); | |
244 #endif | |
245 #ifdef FEAT_BYTEOFF | |
246 static void ml_updatechunk __ARGS((buf_T *buf, long line, long len, int updtype)); | |
247 #endif | |
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248 #ifdef HAVE_READLINK |
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249 static int resolve_symlink __ARGS((char_u *fname, char_u *buf)); |
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250 #endif |
7 | 251 |
252 /* | |
625 | 253 * Open a new memline for "buf". |
7 | 254 * |
625 | 255 * Return FAIL for failure, OK otherwise. |
7 | 256 */ |
257 int | |
625 | 258 ml_open(buf) |
259 buf_T *buf; | |
7 | 260 { |
261 memfile_T *mfp; | |
262 bhdr_T *hp = NULL; | |
263 ZERO_BL *b0p; | |
264 PTR_BL *pp; | |
265 DATA_BL *dp; | |
266 | |
625 | 267 /* |
268 * init fields in memline struct | |
269 */ | |
270 buf->b_ml.ml_stack_size = 0; /* no stack yet */ | |
271 buf->b_ml.ml_stack = NULL; /* no stack yet */ | |
272 buf->b_ml.ml_stack_top = 0; /* nothing in the stack */ | |
273 buf->b_ml.ml_locked = NULL; /* no cached block */ | |
274 buf->b_ml.ml_line_lnum = 0; /* no cached line */ | |
7 | 275 #ifdef FEAT_BYTEOFF |
625 | 276 buf->b_ml.ml_chunksize = NULL; |
7 | 277 #endif |
278 | |
625 | 279 /* |
280 * When 'updatecount' is non-zero swap file may be opened later. | |
281 */ | |
282 if (p_uc && buf->b_p_swf) | |
283 buf->b_may_swap = TRUE; | |
7 | 284 else |
625 | 285 buf->b_may_swap = FALSE; |
286 | |
287 /* | |
288 * Open the memfile. No swap file is created yet. | |
289 */ | |
7 | 290 mfp = mf_open(NULL, 0); |
291 if (mfp == NULL) | |
292 goto error; | |
293 | |
625 | 294 buf->b_ml.ml_mfp = mfp; |
295 buf->b_ml.ml_flags = ML_EMPTY; | |
296 buf->b_ml.ml_line_count = 1; | |
13 | 297 #ifdef FEAT_LINEBREAK |
298 curwin->w_nrwidth_line_count = 0; | |
299 #endif | |
7 | 300 |
301 #if defined(MSDOS) && !defined(DJGPP) | |
302 /* for 16 bit MS-DOS create a swapfile now, because we run out of | |
303 * memory very quickly */ | |
304 if (p_uc != 0) | |
625 | 305 ml_open_file(buf); |
7 | 306 #endif |
307 | |
308 /* | |
309 * fill block0 struct and write page 0 | |
310 */ | |
311 if ((hp = mf_new(mfp, FALSE, 1)) == NULL) | |
312 goto error; | |
313 if (hp->bh_bnum != 0) | |
314 { | |
315 EMSG(_("E298: Didn't get block nr 0?")); | |
316 goto error; | |
317 } | |
318 b0p = (ZERO_BL *)(hp->bh_data); | |
319 | |
320 b0p->b0_id[0] = BLOCK0_ID0; | |
321 b0p->b0_id[1] = BLOCK0_ID1; | |
322 b0p->b0_magic_long = (long)B0_MAGIC_LONG; | |
323 b0p->b0_magic_int = (int)B0_MAGIC_INT; | |
324 b0p->b0_magic_short = (short)B0_MAGIC_SHORT; | |
325 b0p->b0_magic_char = B0_MAGIC_CHAR; | |
326 STRNCPY(b0p->b0_version, "VIM ", 4); | |
327 STRNCPY(b0p->b0_version + 4, Version, 6); | |
328 long_to_char((long)mfp->mf_page_size, b0p->b0_page_size); | |
625 | 329 |
800 | 330 #ifdef FEAT_SPELL |
331 if (!buf->b_spell) | |
332 #endif | |
625 | 333 { |
334 b0p->b0_dirty = buf->b_changed ? B0_DIRTY : 0; | |
335 b0p->b0_flags = get_fileformat(buf) + 1; | |
336 set_b0_fname(b0p, buf); | |
337 (void)get_user_name(b0p->b0_uname, B0_UNAME_SIZE); | |
338 b0p->b0_uname[B0_UNAME_SIZE - 1] = NUL; | |
339 mch_get_host_name(b0p->b0_hname, B0_HNAME_SIZE); | |
340 b0p->b0_hname[B0_HNAME_SIZE - 1] = NUL; | |
341 long_to_char(mch_get_pid(), b0p->b0_pid); | |
342 } | |
7 | 343 |
344 /* | |
345 * Always sync block number 0 to disk, so we can check the file name in | |
625 | 346 * the swap file in findswapname(). Don't do this for help files though |
347 * and spell buffer though. | |
7 | 348 * Only works when there's a swapfile, otherwise it's done when the file |
349 * is created. | |
350 */ | |
351 mf_put(mfp, hp, TRUE, FALSE); | |
625 | 352 if (!buf->b_help && !B_SPELL(buf)) |
7 | 353 (void)mf_sync(mfp, 0); |
354 | |
625 | 355 /* |
356 * Fill in root pointer block and write page 1. | |
357 */ | |
7 | 358 if ((hp = ml_new_ptr(mfp)) == NULL) |
359 goto error; | |
360 if (hp->bh_bnum != 1) | |
361 { | |
362 EMSG(_("E298: Didn't get block nr 1?")); | |
363 goto error; | |
364 } | |
365 pp = (PTR_BL *)(hp->bh_data); | |
366 pp->pb_count = 1; | |
367 pp->pb_pointer[0].pe_bnum = 2; | |
368 pp->pb_pointer[0].pe_page_count = 1; | |
369 pp->pb_pointer[0].pe_old_lnum = 1; | |
370 pp->pb_pointer[0].pe_line_count = 1; /* line count after insertion */ | |
371 mf_put(mfp, hp, TRUE, FALSE); | |
372 | |
625 | 373 /* |
374 * Allocate first data block and create an empty line 1. | |
375 */ | |
7 | 376 if ((hp = ml_new_data(mfp, FALSE, 1)) == NULL) |
377 goto error; | |
378 if (hp->bh_bnum != 2) | |
379 { | |
380 EMSG(_("E298: Didn't get block nr 2?")); | |
381 goto error; | |
382 } | |
383 | |
384 dp = (DATA_BL *)(hp->bh_data); | |
385 dp->db_index[0] = --dp->db_txt_start; /* at end of block */ | |
386 dp->db_free -= 1 + INDEX_SIZE; | |
387 dp->db_line_count = 1; | |
2003 | 388 *((char_u *)dp + dp->db_txt_start) = NUL; /* empty line */ |
7 | 389 |
390 return OK; | |
391 | |
392 error: | |
393 if (mfp != NULL) | |
394 { | |
395 if (hp) | |
396 mf_put(mfp, hp, FALSE, FALSE); | |
397 mf_close(mfp, TRUE); /* will also free(mfp->mf_fname) */ | |
398 } | |
625 | 399 buf->b_ml.ml_mfp = NULL; |
7 | 400 return FAIL; |
401 } | |
402 | |
403 /* | |
404 * ml_setname() is called when the file name of "buf" has been changed. | |
405 * It may rename the swap file. | |
406 */ | |
407 void | |
408 ml_setname(buf) | |
409 buf_T *buf; | |
410 { | |
411 int success = FALSE; | |
412 memfile_T *mfp; | |
413 char_u *fname; | |
414 char_u *dirp; | |
415 #if defined(MSDOS) || defined(MSWIN) | |
416 char_u *p; | |
417 #endif | |
418 | |
419 mfp = buf->b_ml.ml_mfp; | |
420 if (mfp->mf_fd < 0) /* there is no swap file yet */ | |
421 { | |
422 /* | |
423 * When 'updatecount' is 0 and 'noswapfile' there is no swap file. | |
424 * For help files we will make a swap file now. | |
425 */ | |
426 if (p_uc != 0) | |
427 ml_open_file(buf); /* create a swap file */ | |
428 return; | |
429 } | |
430 | |
431 /* | |
432 * Try all directories in the 'directory' option. | |
433 */ | |
434 dirp = p_dir; | |
435 for (;;) | |
436 { | |
437 if (*dirp == NUL) /* tried all directories, fail */ | |
438 break; | |
43 | 439 fname = findswapname(buf, &dirp, mfp->mf_fname); |
440 /* alloc's fname */ | |
7 | 441 if (fname == NULL) /* no file name found for this dir */ |
442 continue; | |
443 | |
444 #if defined(MSDOS) || defined(MSWIN) | |
445 /* | |
446 * Set full pathname for swap file now, because a ":!cd dir" may | |
447 * change directory without us knowing it. | |
448 */ | |
449 p = FullName_save(fname, FALSE); | |
450 vim_free(fname); | |
451 fname = p; | |
452 if (fname == NULL) | |
453 continue; | |
454 #endif | |
455 /* if the file name is the same we don't have to do anything */ | |
456 if (fnamecmp(fname, mfp->mf_fname) == 0) | |
457 { | |
458 vim_free(fname); | |
459 success = TRUE; | |
460 break; | |
461 } | |
462 /* need to close the swap file before renaming */ | |
463 if (mfp->mf_fd >= 0) | |
464 { | |
465 close(mfp->mf_fd); | |
466 mfp->mf_fd = -1; | |
467 } | |
468 | |
469 /* try to rename the swap file */ | |
470 if (vim_rename(mfp->mf_fname, fname) == 0) | |
471 { | |
472 success = TRUE; | |
473 vim_free(mfp->mf_fname); | |
474 mfp->mf_fname = fname; | |
475 vim_free(mfp->mf_ffname); | |
476 #if defined(MSDOS) || defined(MSWIN) | |
477 mfp->mf_ffname = NULL; /* mf_fname is full pathname already */ | |
478 #else | |
479 mf_set_ffname(mfp); | |
480 #endif | |
39 | 481 ml_upd_block0(buf, FALSE); |
7 | 482 break; |
483 } | |
484 vim_free(fname); /* this fname didn't work, try another */ | |
485 } | |
486 | |
487 if (mfp->mf_fd == -1) /* need to (re)open the swap file */ | |
488 { | |
489 mfp->mf_fd = mch_open((char *)mfp->mf_fname, O_RDWR | O_EXTRA, 0); | |
490 if (mfp->mf_fd < 0) | |
491 { | |
492 /* could not (re)open the swap file, what can we do???? */ | |
493 EMSG(_("E301: Oops, lost the swap file!!!")); | |
494 return; | |
495 } | |
2003 | 496 #ifdef HAVE_FD_CLOEXEC |
497 { | |
498 int fdflags = fcntl(mfp->mf_fd, F_GETFD); | |
499 if (fdflags >= 0 && (fdflags & FD_CLOEXEC) == 0) | |
500 fcntl(mfp->mf_fd, F_SETFD, fdflags | FD_CLOEXEC); | |
501 } | |
502 #endif | |
7 | 503 } |
504 if (!success) | |
505 EMSG(_("E302: Could not rename swap file")); | |
506 } | |
507 | |
508 /* | |
509 * Open a file for the memfile for all buffers that are not readonly or have | |
510 * been modified. | |
511 * Used when 'updatecount' changes from zero to non-zero. | |
512 */ | |
513 void | |
514 ml_open_files() | |
515 { | |
516 buf_T *buf; | |
517 | |
518 for (buf = firstbuf; buf != NULL; buf = buf->b_next) | |
519 if (!buf->b_p_ro || buf->b_changed) | |
520 ml_open_file(buf); | |
521 } | |
522 | |
523 /* | |
524 * Open a swap file for an existing memfile, if there is no swap file yet. | |
525 * If we are unable to find a file name, mf_fname will be NULL | |
526 * and the memfile will be in memory only (no recovery possible). | |
527 */ | |
528 void | |
529 ml_open_file(buf) | |
530 buf_T *buf; | |
531 { | |
532 memfile_T *mfp; | |
533 char_u *fname; | |
534 char_u *dirp; | |
535 | |
536 mfp = buf->b_ml.ml_mfp; | |
537 if (mfp == NULL || mfp->mf_fd >= 0 || !buf->b_p_swf) | |
538 return; /* nothing to do */ | |
539 | |
748 | 540 #ifdef FEAT_SPELL |
625 | 541 /* For a spell buffer use a temp file name. */ |
542 if (buf->b_spell) | |
543 { | |
544 fname = vim_tempname('s'); | |
545 if (fname != NULL) | |
546 (void)mf_open_file(mfp, fname); /* consumes fname! */ | |
547 buf->b_may_swap = FALSE; | |
548 return; | |
549 } | |
550 #endif | |
551 | |
7 | 552 /* |
553 * Try all directories in 'directory' option. | |
554 */ | |
555 dirp = p_dir; | |
556 for (;;) | |
557 { | |
558 if (*dirp == NUL) | |
559 break; | |
560 /* There is a small chance that between chosing the swap file name and | |
561 * creating it, another Vim creates the file. In that case the | |
562 * creation will fail and we will use another directory. */ | |
43 | 563 fname = findswapname(buf, &dirp, NULL); /* allocates fname */ |
7 | 564 if (fname == NULL) |
565 continue; | |
566 if (mf_open_file(mfp, fname) == OK) /* consumes fname! */ | |
567 { | |
568 #if defined(MSDOS) || defined(MSWIN) || defined(RISCOS) | |
569 /* | |
570 * set full pathname for swap file now, because a ":!cd dir" may | |
571 * change directory without us knowing it. | |
572 */ | |
573 mf_fullname(mfp); | |
574 #endif | |
39 | 575 ml_upd_block0(buf, FALSE); |
576 | |
7 | 577 /* Flush block zero, so others can read it */ |
578 if (mf_sync(mfp, MFS_ZERO) == OK) | |
630 | 579 { |
580 /* Mark all blocks that should be in the swapfile as dirty. | |
581 * Needed for when the 'swapfile' option was reset, so that | |
582 * the swap file was deleted, and then on again. */ | |
583 mf_set_dirty(mfp); | |
7 | 584 break; |
630 | 585 } |
7 | 586 /* Writing block 0 failed: close the file and try another dir */ |
587 mf_close_file(buf, FALSE); | |
588 } | |
589 } | |
590 | |
591 if (mfp->mf_fname == NULL) /* Failed! */ | |
592 { | |
593 need_wait_return = TRUE; /* call wait_return later */ | |
594 ++no_wait_return; | |
595 (void)EMSG2(_("E303: Unable to open swap file for \"%s\", recovery impossible"), | |
596 buf_spname(buf) != NULL | |
597 ? (char_u *)buf_spname(buf) | |
598 : buf->b_fname); | |
599 --no_wait_return; | |
600 } | |
601 | |
602 /* don't try to open a swap file again */ | |
603 buf->b_may_swap = FALSE; | |
604 } | |
605 | |
606 /* | |
607 * If still need to create a swap file, and starting to edit a not-readonly | |
608 * file, or reading into an existing buffer, create a swap file now. | |
609 */ | |
610 void | |
611 check_need_swap(newfile) | |
612 int newfile; /* reading file into new buffer */ | |
613 { | |
614 if (curbuf->b_may_swap && (!curbuf->b_p_ro || !newfile)) | |
615 ml_open_file(curbuf); | |
616 } | |
617 | |
618 /* | |
619 * Close memline for buffer 'buf'. | |
620 * If 'del_file' is TRUE, delete the swap file | |
621 */ | |
622 void | |
623 ml_close(buf, del_file) | |
624 buf_T *buf; | |
625 int del_file; | |
626 { | |
627 if (buf->b_ml.ml_mfp == NULL) /* not open */ | |
628 return; | |
629 mf_close(buf->b_ml.ml_mfp, del_file); /* close the .swp file */ | |
630 if (buf->b_ml.ml_line_lnum != 0 && (buf->b_ml.ml_flags & ML_LINE_DIRTY)) | |
631 vim_free(buf->b_ml.ml_line_ptr); | |
632 vim_free(buf->b_ml.ml_stack); | |
633 #ifdef FEAT_BYTEOFF | |
634 vim_free(buf->b_ml.ml_chunksize); | |
635 buf->b_ml.ml_chunksize = NULL; | |
636 #endif | |
637 buf->b_ml.ml_mfp = NULL; | |
638 | |
639 /* Reset the "recovered" flag, give the ATTENTION prompt the next time | |
640 * this buffer is loaded. */ | |
641 buf->b_flags &= ~BF_RECOVERED; | |
642 } | |
643 | |
644 /* | |
645 * Close all existing memlines and memfiles. | |
646 * Only used when exiting. | |
647 * When 'del_file' is TRUE, delete the memfiles. | |
165 | 648 * But don't delete files that were ":preserve"d when we are POSIX compatible. |
7 | 649 */ |
650 void | |
651 ml_close_all(del_file) | |
652 int del_file; | |
653 { | |
654 buf_T *buf; | |
655 | |
656 for (buf = firstbuf; buf != NULL; buf = buf->b_next) | |
165 | 657 ml_close(buf, del_file && ((buf->b_flags & BF_PRESERVED) == 0 |
658 || vim_strchr(p_cpo, CPO_PRESERVE) == NULL)); | |
7 | 659 #ifdef TEMPDIRNAMES |
660 vim_deltempdir(); /* delete created temp directory */ | |
661 #endif | |
662 } | |
663 | |
664 /* | |
665 * Close all memfiles for not modified buffers. | |
666 * Only use just before exiting! | |
667 */ | |
668 void | |
669 ml_close_notmod() | |
670 { | |
671 buf_T *buf; | |
672 | |
673 for (buf = firstbuf; buf != NULL; buf = buf->b_next) | |
674 if (!bufIsChanged(buf)) | |
675 ml_close(buf, TRUE); /* close all not-modified buffers */ | |
676 } | |
677 | |
678 /* | |
679 * Update the timestamp in the .swp file. | |
680 * Used when the file has been written. | |
681 */ | |
682 void | |
683 ml_timestamp(buf) | |
684 buf_T *buf; | |
685 { | |
39 | 686 ml_upd_block0(buf, TRUE); |
687 } | |
688 | |
689 /* | |
690 * Update the timestamp or the B0_SAME_DIR flag of the .swp file. | |
691 */ | |
692 static void | |
944 | 693 ml_upd_block0(buf, set_fname) |
39 | 694 buf_T *buf; |
944 | 695 int set_fname; |
39 | 696 { |
7 | 697 memfile_T *mfp; |
698 bhdr_T *hp; | |
699 ZERO_BL *b0p; | |
700 | |
701 mfp = buf->b_ml.ml_mfp; | |
702 if (mfp == NULL || (hp = mf_get(mfp, (blocknr_T)0, 1)) == NULL) | |
703 return; | |
704 b0p = (ZERO_BL *)(hp->bh_data); | |
705 if (b0p->b0_id[0] != BLOCK0_ID0 || b0p->b0_id[1] != BLOCK0_ID1) | |
39 | 706 EMSG(_("E304: ml_upd_block0(): Didn't get block 0??")); |
7 | 707 else |
39 | 708 { |
944 | 709 if (set_fname) |
39 | 710 set_b0_fname(b0p, buf); |
711 else | |
712 set_b0_dir_flag(b0p, buf); | |
713 } | |
7 | 714 mf_put(mfp, hp, TRUE, FALSE); |
715 } | |
716 | |
717 /* | |
718 * Write file name and timestamp into block 0 of a swap file. | |
719 * Also set buf->b_mtime. | |
720 * Don't use NameBuff[]!!! | |
721 */ | |
722 static void | |
723 set_b0_fname(b0p, buf) | |
724 ZERO_BL *b0p; | |
725 buf_T *buf; | |
726 { | |
727 struct stat st; | |
728 | |
729 if (buf->b_ffname == NULL) | |
730 b0p->b0_fname[0] = NUL; | |
731 else | |
732 { | |
733 #if defined(MSDOS) || defined(MSWIN) || defined(AMIGA) || defined(RISCOS) | |
39 | 734 /* Systems that cannot translate "~user" back into a path: copy the |
735 * file name unmodified. Do use slashes instead of backslashes for | |
736 * portability. */ | |
419 | 737 vim_strncpy(b0p->b0_fname, buf->b_ffname, B0_FNAME_SIZE - 1); |
39 | 738 # ifdef BACKSLASH_IN_FILENAME |
739 forward_slash(b0p->b0_fname); | |
740 # endif | |
7 | 741 #else |
742 size_t flen, ulen; | |
743 char_u uname[B0_UNAME_SIZE]; | |
744 | |
745 /* | |
746 * For a file under the home directory of the current user, we try to | |
747 * replace the home directory path with "~user". This helps when | |
748 * editing the same file on different machines over a network. | |
749 * First replace home dir path with "~/" with home_replace(). | |
750 * Then insert the user name to get "~user/". | |
751 */ | |
752 home_replace(NULL, buf->b_ffname, b0p->b0_fname, B0_FNAME_SIZE, TRUE); | |
753 if (b0p->b0_fname[0] == '~') | |
754 { | |
755 flen = STRLEN(b0p->b0_fname); | |
756 /* If there is no user name or it is too long, don't use "~/" */ | |
757 if (get_user_name(uname, B0_UNAME_SIZE) == FAIL | |
758 || (ulen = STRLEN(uname)) + flen > B0_FNAME_SIZE - 1) | |
419 | 759 vim_strncpy(b0p->b0_fname, buf->b_ffname, B0_FNAME_SIZE - 1); |
7 | 760 else |
761 { | |
762 mch_memmove(b0p->b0_fname + ulen + 1, b0p->b0_fname + 1, flen); | |
763 mch_memmove(b0p->b0_fname + 1, uname, ulen); | |
764 } | |
765 } | |
766 #endif | |
767 if (mch_stat((char *)buf->b_ffname, &st) >= 0) | |
768 { | |
769 long_to_char((long)st.st_mtime, b0p->b0_mtime); | |
770 #ifdef CHECK_INODE | |
771 long_to_char((long)st.st_ino, b0p->b0_ino); | |
772 #endif | |
773 buf_store_time(buf, &st, buf->b_ffname); | |
774 buf->b_mtime_read = buf->b_mtime; | |
775 } | |
776 else | |
777 { | |
778 long_to_char(0L, b0p->b0_mtime); | |
779 #ifdef CHECK_INODE | |
780 long_to_char(0L, b0p->b0_ino); | |
781 #endif | |
782 buf->b_mtime = 0; | |
783 buf->b_mtime_read = 0; | |
784 buf->b_orig_size = 0; | |
785 buf->b_orig_mode = 0; | |
786 } | |
787 } | |
39 | 788 |
789 #ifdef FEAT_MBYTE | |
790 /* Also add the 'fileencoding' if there is room. */ | |
791 add_b0_fenc(b0p, curbuf); | |
792 #endif | |
7 | 793 } |
794 | |
795 /* | |
39 | 796 * Update the B0_SAME_DIR flag of the swap file. It's set if the file and the |
797 * swapfile for "buf" are in the same directory. | |
798 * This is fail safe: if we are not sure the directories are equal the flag is | |
799 * not set. | |
800 */ | |
801 static void | |
802 set_b0_dir_flag(b0p, buf) | |
803 ZERO_BL *b0p; | |
804 buf_T *buf; | |
805 { | |
806 if (same_directory(buf->b_ml.ml_mfp->mf_fname, buf->b_ffname)) | |
807 b0p->b0_flags |= B0_SAME_DIR; | |
808 else | |
809 b0p->b0_flags &= ~B0_SAME_DIR; | |
810 } | |
811 | |
812 #ifdef FEAT_MBYTE | |
813 /* | |
814 * When there is room, add the 'fileencoding' to block zero. | |
815 */ | |
816 static void | |
817 add_b0_fenc(b0p, buf) | |
818 ZERO_BL *b0p; | |
819 buf_T *buf; | |
820 { | |
821 int n; | |
822 | |
835 | 823 n = (int)STRLEN(buf->b_p_fenc); |
39 | 824 if (STRLEN(b0p->b0_fname) + n + 1 > B0_FNAME_SIZE) |
825 b0p->b0_flags &= ~B0_HAS_FENC; | |
826 else | |
827 { | |
828 mch_memmove((char *)b0p->b0_fname + B0_FNAME_SIZE - n, | |
829 (char *)buf->b_p_fenc, (size_t)n); | |
830 *(b0p->b0_fname + B0_FNAME_SIZE - n - 1) = NUL; | |
831 b0p->b0_flags |= B0_HAS_FENC; | |
832 } | |
833 } | |
834 #endif | |
835 | |
836 | |
837 /* | |
7 | 838 * try to recover curbuf from the .swp file |
839 */ | |
840 void | |
841 ml_recover() | |
842 { | |
843 buf_T *buf = NULL; | |
844 memfile_T *mfp = NULL; | |
845 char_u *fname; | |
846 bhdr_T *hp = NULL; | |
847 ZERO_BL *b0p; | |
39 | 848 int b0_ff; |
849 char_u *b0_fenc = NULL; | |
7 | 850 PTR_BL *pp; |
851 DATA_BL *dp; | |
852 infoptr_T *ip; | |
853 blocknr_T bnum; | |
854 int page_count; | |
855 struct stat org_stat, swp_stat; | |
856 int len; | |
857 int directly; | |
858 linenr_T lnum; | |
859 char_u *p; | |
860 int i; | |
861 long error; | |
862 int cannot_open; | |
863 linenr_T line_count; | |
864 int has_error; | |
865 int idx; | |
866 int top; | |
867 int txt_start; | |
868 off_t size; | |
869 int called_from_main; | |
870 int serious_error = TRUE; | |
871 long mtime; | |
872 int attr; | |
2162
0527eb0f6918
After recovery check if the text changed. If it did mark the buffer as
Bram Moolenaar <bram@vim.org>
parents:
2145
diff
changeset
|
873 int orig_file_status = NOTDONE; |
7 | 874 |
875 recoverymode = TRUE; | |
876 called_from_main = (curbuf->b_ml.ml_mfp == NULL); | |
877 attr = hl_attr(HLF_E); | |
1975 | 878 |
879 /* | |
880 * If the file name ends in ".s[uvw][a-z]" we assume this is the swap file. | |
881 * Otherwise a search is done to find the swap file(s). | |
882 */ | |
7 | 883 fname = curbuf->b_fname; |
884 if (fname == NULL) /* When there is no file name */ | |
885 fname = (char_u *)""; | |
886 len = (int)STRLEN(fname); | |
887 if (len >= 4 && | |
888 #if defined(VMS) || defined(RISCOS) | |
1975 | 889 STRNICMP(fname + len - 4, "_s" , 2) |
7 | 890 #else |
1975 | 891 STRNICMP(fname + len - 4, ".s" , 2) |
7 | 892 #endif |
1975 | 893 == 0 |
894 && vim_strchr((char_u *)"UVWuvw", fname[len - 2]) != NULL | |
895 && ASCII_ISALPHA(fname[len - 1])) | |
7 | 896 { |
897 directly = TRUE; | |
898 fname = vim_strsave(fname); /* make a copy for mf_open() */ | |
899 } | |
900 else | |
901 { | |
902 directly = FALSE; | |
903 | |
904 /* count the number of matching swap files */ | |
905 len = recover_names(&fname, FALSE, 0); | |
906 if (len == 0) /* no swap files found */ | |
907 { | |
908 EMSG2(_("E305: No swap file found for %s"), fname); | |
909 goto theend; | |
910 } | |
911 if (len == 1) /* one swap file found, use it */ | |
912 i = 1; | |
913 else /* several swap files found, choose */ | |
914 { | |
915 /* list the names of the swap files */ | |
916 (void)recover_names(&fname, TRUE, 0); | |
917 msg_putchar('\n'); | |
918 MSG_PUTS(_("Enter number of swap file to use (0 to quit): ")); | |
374 | 919 i = get_number(FALSE, NULL); |
7 | 920 if (i < 1 || i > len) |
921 goto theend; | |
922 } | |
923 /* get the swap file name that will be used */ | |
924 (void)recover_names(&fname, FALSE, i); | |
925 } | |
926 if (fname == NULL) | |
927 goto theend; /* out of memory */ | |
928 | |
929 /* When called from main() still need to initialize storage structure */ | |
625 | 930 if (called_from_main && ml_open(curbuf) == FAIL) |
7 | 931 getout(1); |
932 | |
933 /* | |
934 * allocate a buffer structure (only the memline in it is really used) | |
935 */ | |
936 buf = (buf_T *)alloc((unsigned)sizeof(buf_T)); | |
937 if (buf == NULL) | |
938 { | |
939 vim_free(fname); | |
940 goto theend; | |
941 } | |
942 | |
943 /* | |
944 * init fields in memline struct | |
945 */ | |
946 buf->b_ml.ml_stack_size = 0; /* no stack yet */ | |
947 buf->b_ml.ml_stack = NULL; /* no stack yet */ | |
948 buf->b_ml.ml_stack_top = 0; /* nothing in the stack */ | |
949 buf->b_ml.ml_line_lnum = 0; /* no cached line */ | |
950 buf->b_ml.ml_locked = NULL; /* no locked block */ | |
951 buf->b_ml.ml_flags = 0; | |
952 | |
953 /* | |
954 * open the memfile from the old swap file | |
955 */ | |
956 p = vim_strsave(fname); /* save fname for the message | |
957 (mf_open() may free fname) */ | |
958 mfp = mf_open(fname, O_RDONLY); /* consumes fname! */ | |
959 if (mfp == NULL || mfp->mf_fd < 0) | |
960 { | |
961 if (p != NULL) | |
962 { | |
963 EMSG2(_("E306: Cannot open %s"), p); | |
964 vim_free(p); | |
965 } | |
966 goto theend; | |
967 } | |
968 vim_free(p); | |
969 buf->b_ml.ml_mfp = mfp; | |
970 | |
971 /* | |
972 * The page size set in mf_open() might be different from the page size | |
973 * used in the swap file, we must get it from block 0. But to read block | |
974 * 0 we need a page size. Use the minimal size for block 0 here, it will | |
975 * be set to the real value below. | |
976 */ | |
977 mfp->mf_page_size = MIN_SWAP_PAGE_SIZE; | |
978 | |
979 /* | |
980 * try to read block 0 | |
981 */ | |
982 if ((hp = mf_get(mfp, (blocknr_T)0, 1)) == NULL) | |
983 { | |
984 msg_start(); | |
985 MSG_PUTS_ATTR(_("Unable to read block 0 from "), attr | MSG_HIST); | |
986 msg_outtrans_attr(mfp->mf_fname, attr | MSG_HIST); | |
987 MSG_PUTS_ATTR( | |
988 _("\nMaybe no changes were made or Vim did not update the swap file."), | |
989 attr | MSG_HIST); | |
990 msg_end(); | |
991 goto theend; | |
992 } | |
993 b0p = (ZERO_BL *)(hp->bh_data); | |
994 if (STRNCMP(b0p->b0_version, "VIM 3.0", 7) == 0) | |
995 { | |
996 msg_start(); | |
997 msg_outtrans_attr(mfp->mf_fname, MSG_HIST); | |
998 MSG_PUTS_ATTR(_(" cannot be used with this version of Vim.\n"), | |
999 MSG_HIST); | |
1000 MSG_PUTS_ATTR(_("Use Vim version 3.0.\n"), MSG_HIST); | |
1001 msg_end(); | |
1002 goto theend; | |
1003 } | |
1004 if (b0p->b0_id[0] != BLOCK0_ID0 || b0p->b0_id[1] != BLOCK0_ID1) | |
1005 { | |
1006 EMSG2(_("E307: %s does not look like a Vim swap file"), mfp->mf_fname); | |
1007 goto theend; | |
1008 } | |
1009 if (b0_magic_wrong(b0p)) | |
1010 { | |
1011 msg_start(); | |
1012 msg_outtrans_attr(mfp->mf_fname, attr | MSG_HIST); | |
1013 #if defined(MSDOS) || defined(MSWIN) | |
1014 if (STRNCMP(b0p->b0_hname, "PC ", 3) == 0) | |
1015 MSG_PUTS_ATTR(_(" cannot be used with this version of Vim.\n"), | |
1016 attr | MSG_HIST); | |
1017 else | |
1018 #endif | |
1019 MSG_PUTS_ATTR(_(" cannot be used on this computer.\n"), | |
1020 attr | MSG_HIST); | |
1021 MSG_PUTS_ATTR(_("The file was created on "), attr | MSG_HIST); | |
1022 /* avoid going past the end of a currupted hostname */ | |
1023 b0p->b0_fname[0] = NUL; | |
1024 MSG_PUTS_ATTR(b0p->b0_hname, attr | MSG_HIST); | |
1025 MSG_PUTS_ATTR(_(",\nor the file has been damaged."), attr | MSG_HIST); | |
1026 msg_end(); | |
1027 goto theend; | |
1028 } | |
1105 | 1029 |
7 | 1030 /* |
1031 * If we guessed the wrong page size, we have to recalculate the | |
1032 * highest block number in the file. | |
1033 */ | |
1034 if (mfp->mf_page_size != (unsigned)char_to_long(b0p->b0_page_size)) | |
1035 { | |
1105 | 1036 unsigned previous_page_size = mfp->mf_page_size; |
1037 | |
7 | 1038 mf_new_page_size(mfp, (unsigned)char_to_long(b0p->b0_page_size)); |
1105 | 1039 if (mfp->mf_page_size < previous_page_size) |
1040 { | |
1041 msg_start(); | |
1042 msg_outtrans_attr(mfp->mf_fname, attr | MSG_HIST); | |
1043 MSG_PUTS_ATTR(_(" has been damaged (page size is smaller than minimum value).\n"), | |
1044 attr | MSG_HIST); | |
1045 msg_end(); | |
1046 goto theend; | |
1047 } | |
7 | 1048 if ((size = lseek(mfp->mf_fd, (off_t)0L, SEEK_END)) <= 0) |
1049 mfp->mf_blocknr_max = 0; /* no file or empty file */ | |
1050 else | |
1051 mfp->mf_blocknr_max = (blocknr_T)(size / mfp->mf_page_size); | |
1052 mfp->mf_infile_count = mfp->mf_blocknr_max; | |
1105 | 1053 |
1054 /* need to reallocate the memory used to store the data */ | |
1055 p = alloc(mfp->mf_page_size); | |
1056 if (p == NULL) | |
1057 goto theend; | |
1058 mch_memmove(p, hp->bh_data, previous_page_size); | |
1059 vim_free(hp->bh_data); | |
1060 hp->bh_data = p; | |
1061 b0p = (ZERO_BL *)(hp->bh_data); | |
7 | 1062 } |
1063 | |
1064 /* | |
1065 * If .swp file name given directly, use name from swap file for buffer. | |
1066 */ | |
1067 if (directly) | |
1068 { | |
1069 expand_env(b0p->b0_fname, NameBuff, MAXPATHL); | |
1070 if (setfname(curbuf, NameBuff, NULL, TRUE) == FAIL) | |
1071 goto theend; | |
1072 } | |
1073 | |
1074 home_replace(NULL, mfp->mf_fname, NameBuff, MAXPATHL, TRUE); | |
274 | 1075 smsg((char_u *)_("Using swap file \"%s\""), NameBuff); |
7 | 1076 |
1077 if (buf_spname(curbuf) != NULL) | |
1078 STRCPY(NameBuff, buf_spname(curbuf)); | |
1079 else | |
1080 home_replace(NULL, curbuf->b_ffname, NameBuff, MAXPATHL, TRUE); | |
274 | 1081 smsg((char_u *)_("Original file \"%s\""), NameBuff); |
7 | 1082 msg_putchar('\n'); |
1083 | |
1084 /* | |
1085 * check date of swap file and original file | |
1086 */ | |
1087 mtime = char_to_long(b0p->b0_mtime); | |
1088 if (curbuf->b_ffname != NULL | |
1089 && mch_stat((char *)curbuf->b_ffname, &org_stat) != -1 | |
1090 && ((mch_stat((char *)mfp->mf_fname, &swp_stat) != -1 | |
1091 && org_stat.st_mtime > swp_stat.st_mtime) | |
1092 || org_stat.st_mtime != mtime)) | |
1093 { | |
1094 EMSG(_("E308: Warning: Original file may have been changed")); | |
1095 } | |
1096 out_flush(); | |
39 | 1097 |
1098 /* Get the 'fileformat' and 'fileencoding' from block zero. */ | |
1099 b0_ff = (b0p->b0_flags & B0_FF_MASK); | |
1100 if (b0p->b0_flags & B0_HAS_FENC) | |
1101 { | |
1102 for (p = b0p->b0_fname + B0_FNAME_SIZE; | |
1103 p > b0p->b0_fname && p[-1] != NUL; --p) | |
1104 ; | |
835 | 1105 b0_fenc = vim_strnsave(p, (int)(b0p->b0_fname + B0_FNAME_SIZE - p)); |
39 | 1106 } |
1107 | |
7 | 1108 mf_put(mfp, hp, FALSE, FALSE); /* release block 0 */ |
1109 hp = NULL; | |
1110 | |
1111 /* | |
1112 * Now that we are sure that the file is going to be recovered, clear the | |
1113 * contents of the current buffer. | |
1114 */ | |
1115 while (!(curbuf->b_ml.ml_flags & ML_EMPTY)) | |
1116 ml_delete((linenr_T)1, FALSE); | |
1117 | |
1118 /* | |
1119 * Try reading the original file to obtain the values of 'fileformat', | |
1120 * 'fileencoding', etc. Ignore errors. The text itself is not used. | |
1121 */ | |
1122 if (curbuf->b_ffname != NULL) | |
2162
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After recovery check if the text changed. If it did mark the buffer as
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diff
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|
1123 orig_file_status = readfile(curbuf->b_ffname, NULL, (linenr_T)0, |
7 | 1124 (linenr_T)0, (linenr_T)MAXLNUM, NULL, READ_NEW); |
1125 | |
39 | 1126 /* Use the 'fileformat' and 'fileencoding' as stored in the swap file. */ |
1127 if (b0_ff != 0) | |
1128 set_fileformat(b0_ff - 1, OPT_LOCAL); | |
1129 if (b0_fenc != NULL) | |
1130 { | |
1131 set_option_value((char_u *)"fenc", 0L, b0_fenc, OPT_LOCAL); | |
1132 vim_free(b0_fenc); | |
1133 } | |
1134 unchanged(curbuf, TRUE); | |
1135 | |
7 | 1136 bnum = 1; /* start with block 1 */ |
1137 page_count = 1; /* which is 1 page */ | |
1138 lnum = 0; /* append after line 0 in curbuf */ | |
1139 line_count = 0; | |
1140 idx = 0; /* start with first index in block 1 */ | |
1141 error = 0; | |
1142 buf->b_ml.ml_stack_top = 0; | |
1143 buf->b_ml.ml_stack = NULL; | |
1144 buf->b_ml.ml_stack_size = 0; /* no stack yet */ | |
1145 | |
1146 if (curbuf->b_ffname == NULL) | |
1147 cannot_open = TRUE; | |
1148 else | |
1149 cannot_open = FALSE; | |
1150 | |
1151 serious_error = FALSE; | |
1152 for ( ; !got_int; line_breakcheck()) | |
1153 { | |
1154 if (hp != NULL) | |
1155 mf_put(mfp, hp, FALSE, FALSE); /* release previous block */ | |
1156 | |
1157 /* | |
1158 * get block | |
1159 */ | |
1160 if ((hp = mf_get(mfp, (blocknr_T)bnum, page_count)) == NULL) | |
1161 { | |
1162 if (bnum == 1) | |
1163 { | |
1164 EMSG2(_("E309: Unable to read block 1 from %s"), mfp->mf_fname); | |
1165 goto theend; | |
1166 } | |
1167 ++error; | |
1168 ml_append(lnum++, (char_u *)_("???MANY LINES MISSING"), | |
1169 (colnr_T)0, TRUE); | |
1170 } | |
1171 else /* there is a block */ | |
1172 { | |
1173 pp = (PTR_BL *)(hp->bh_data); | |
1174 if (pp->pb_id == PTR_ID) /* it is a pointer block */ | |
1175 { | |
1176 /* check line count when using pointer block first time */ | |
1177 if (idx == 0 && line_count != 0) | |
1178 { | |
1179 for (i = 0; i < (int)pp->pb_count; ++i) | |
1180 line_count -= pp->pb_pointer[i].pe_line_count; | |
1181 if (line_count != 0) | |
1182 { | |
1183 ++error; | |
1184 ml_append(lnum++, (char_u *)_("???LINE COUNT WRONG"), | |
1185 (colnr_T)0, TRUE); | |
1186 } | |
1187 } | |
1188 | |
1189 if (pp->pb_count == 0) | |
1190 { | |
1191 ml_append(lnum++, (char_u *)_("???EMPTY BLOCK"), | |
1192 (colnr_T)0, TRUE); | |
1193 ++error; | |
1194 } | |
1195 else if (idx < (int)pp->pb_count) /* go a block deeper */ | |
1196 { | |
1197 if (pp->pb_pointer[idx].pe_bnum < 0) | |
1198 { | |
1199 /* | |
1200 * Data block with negative block number. | |
1201 * Try to read lines from the original file. | |
1202 * This is slow, but it works. | |
1203 */ | |
1204 if (!cannot_open) | |
1205 { | |
1206 line_count = pp->pb_pointer[idx].pe_line_count; | |
1207 if (readfile(curbuf->b_ffname, NULL, lnum, | |
1208 pp->pb_pointer[idx].pe_old_lnum - 1, | |
1209 line_count, NULL, 0) == FAIL) | |
1210 cannot_open = TRUE; | |
1211 else | |
1212 lnum += line_count; | |
1213 } | |
1214 if (cannot_open) | |
1215 { | |
1216 ++error; | |
1217 ml_append(lnum++, (char_u *)_("???LINES MISSING"), | |
1218 (colnr_T)0, TRUE); | |
1219 } | |
1220 ++idx; /* get same block again for next index */ | |
1221 continue; | |
1222 } | |
1223 | |
1224 /* | |
1225 * going one block deeper in the tree | |
1226 */ | |
1227 if ((top = ml_add_stack(buf)) < 0) /* new entry in stack */ | |
1228 { | |
1229 ++error; | |
1230 break; /* out of memory */ | |
1231 } | |
1232 ip = &(buf->b_ml.ml_stack[top]); | |
1233 ip->ip_bnum = bnum; | |
1234 ip->ip_index = idx; | |
1235 | |
1236 bnum = pp->pb_pointer[idx].pe_bnum; | |
1237 line_count = pp->pb_pointer[idx].pe_line_count; | |
1238 page_count = pp->pb_pointer[idx].pe_page_count; | |
1239 continue; | |
1240 } | |
1241 } | |
1242 else /* not a pointer block */ | |
1243 { | |
1244 dp = (DATA_BL *)(hp->bh_data); | |
1245 if (dp->db_id != DATA_ID) /* block id wrong */ | |
1246 { | |
1247 if (bnum == 1) | |
1248 { | |
1249 EMSG2(_("E310: Block 1 ID wrong (%s not a .swp file?)"), | |
1250 mfp->mf_fname); | |
1251 goto theend; | |
1252 } | |
1253 ++error; | |
1254 ml_append(lnum++, (char_u *)_("???BLOCK MISSING"), | |
1255 (colnr_T)0, TRUE); | |
1256 } | |
1257 else | |
1258 { | |
1259 /* | |
1260 * it is a data block | |
1261 * Append all the lines in this block | |
1262 */ | |
1263 has_error = FALSE; | |
1264 /* | |
1265 * check length of block | |
1266 * if wrong, use length in pointer block | |
1267 */ | |
1268 if (page_count * mfp->mf_page_size != dp->db_txt_end) | |
1269 { | |
1270 ml_append(lnum++, (char_u *)_("??? from here until ???END lines may be messed up"), | |
1271 (colnr_T)0, TRUE); | |
1272 ++error; | |
1273 has_error = TRUE; | |
1274 dp->db_txt_end = page_count * mfp->mf_page_size; | |
1275 } | |
1276 | |
1277 /* make sure there is a NUL at the end of the block */ | |
1278 *((char_u *)dp + dp->db_txt_end - 1) = NUL; | |
1279 | |
1280 /* | |
1281 * check number of lines in block | |
1282 * if wrong, use count in data block | |
1283 */ | |
1284 if (line_count != dp->db_line_count) | |
1285 { | |
1286 ml_append(lnum++, (char_u *)_("??? from here until ???END lines may have been inserted/deleted"), | |
1287 (colnr_T)0, TRUE); | |
1288 ++error; | |
1289 has_error = TRUE; | |
1290 } | |
1291 | |
1292 for (i = 0; i < dp->db_line_count; ++i) | |
1293 { | |
1294 txt_start = (dp->db_index[i] & DB_INDEX_MASK); | |
1978 | 1295 if (txt_start <= (int)HEADER_SIZE |
7 | 1296 || txt_start >= (int)dp->db_txt_end) |
1297 { | |
1298 p = (char_u *)"???"; | |
1299 ++error; | |
1300 } | |
1301 else | |
1302 p = (char_u *)dp + txt_start; | |
1303 ml_append(lnum++, p, (colnr_T)0, TRUE); | |
1304 } | |
1305 if (has_error) | |
1978 | 1306 ml_append(lnum++, (char_u *)_("???END"), |
1307 (colnr_T)0, TRUE); | |
7 | 1308 } |
1309 } | |
1310 } | |
1311 | |
1312 if (buf->b_ml.ml_stack_top == 0) /* finished */ | |
1313 break; | |
1314 | |
1315 /* | |
1316 * go one block up in the tree | |
1317 */ | |
1318 ip = &(buf->b_ml.ml_stack[--(buf->b_ml.ml_stack_top)]); | |
1319 bnum = ip->ip_bnum; | |
1320 idx = ip->ip_index + 1; /* go to next index */ | |
1321 page_count = 1; | |
1322 } | |
1323 | |
1324 /* | |
2162
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1325 * Compare the buffer contents with the original file. When they differ |
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1326 * set the 'modified' flag. |
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1327 * Lines 1 - lnum are the new contents. |
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1328 * Lines lnum + 1 to ml_line_count are the original contents. |
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|
1329 * Line ml_line_count + 1 in the dummy empty line. |
7 | 1330 */ |
2162
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1331 if (orig_file_status != OK || curbuf->b_ml.ml_line_count != lnum * 2 + 1) |
0527eb0f6918
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1332 { |
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1333 /* Recovering an empty file results in two lines and the first line is |
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1334 * empty. Don't set the modified flag then. */ |
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|
1335 if (!(curbuf->b_ml.ml_line_count == 2 && *ml_get(1) == NUL)) |
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1336 { |
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|
1337 changed_int(); |
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|
1338 ++curbuf->b_changedtick; |
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1339 } |
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1340 } |
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|
1341 else |
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|
1342 { |
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1343 for (idx = 1; idx <= lnum; ++idx) |
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After recovery check if the text changed. If it did mark the buffer as
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|
1344 { |
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After recovery check if the text changed. If it did mark the buffer as
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|
1345 /* Need to copy one line, fetching the other one may flush it. */ |
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|
1346 p = vim_strsave(ml_get(idx)); |
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|
1347 i = STRCMP(p, ml_get(idx + lnum)); |
0527eb0f6918
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|
1348 vim_free(p); |
0527eb0f6918
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|
1349 if (i != 0) |
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1350 { |
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|
1351 changed_int(); |
0527eb0f6918
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|
1352 ++curbuf->b_changedtick; |
0527eb0f6918
After recovery check if the text changed. If it did mark the buffer as
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changeset
|
1353 break; |
0527eb0f6918
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|
1354 } |
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|
1355 } |
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|
1356 } |
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|
1357 |
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|
1358 /* |
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diff
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|
1359 * Delete the lines from the original file and the dummy line from the |
0527eb0f6918
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diff
changeset
|
1360 * empty buffer. These will now be after the last line in the buffer. |
0527eb0f6918
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|
1361 */ |
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1362 while (curbuf->b_ml.ml_line_count > lnum |
0527eb0f6918
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1363 && !(curbuf->b_ml.ml_flags & ML_EMPTY)) |
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1364 ml_delete(curbuf->b_ml.ml_line_count, FALSE); |
7 | 1365 curbuf->b_flags |= BF_RECOVERED; |
1366 | |
1367 recoverymode = FALSE; | |
1368 if (got_int) | |
1369 EMSG(_("E311: Recovery Interrupted")); | |
1370 else if (error) | |
1371 { | |
1372 ++no_wait_return; | |
1373 MSG(">>>>>>>>>>>>>"); | |
1374 EMSG(_("E312: Errors detected while recovering; look for lines starting with ???")); | |
1375 --no_wait_return; | |
1376 MSG(_("See \":help E312\" for more information.")); | |
1377 MSG(">>>>>>>>>>>>>"); | |
1378 } | |
1379 else | |
1380 { | |
2162
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1381 if (curbuf->b_changed) |
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1382 { |
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1383 MSG(_("Recovery completed. You should check if everything is OK.")); |
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1384 MSG_PUTS(_("\n(You might want to write out this file under another name\n")); |
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1385 MSG_PUTS(_("and run diff with the original file to check for changes)")); |
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|
1386 } |
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|
1387 else |
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|
1388 MSG(_("Recovery completed. Buffer contents equals file contents.")); |
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1389 MSG_PUTS(_("\nYou may want to delete the .swp file now.\n\n")); |
7 | 1390 cmdline_row = msg_row; |
1391 } | |
1392 redraw_curbuf_later(NOT_VALID); | |
1393 | |
1394 theend: | |
1395 recoverymode = FALSE; | |
1396 if (mfp != NULL) | |
1397 { | |
1398 if (hp != NULL) | |
1399 mf_put(mfp, hp, FALSE, FALSE); | |
1400 mf_close(mfp, FALSE); /* will also vim_free(mfp->mf_fname) */ | |
1401 } | |
1053 | 1402 if (buf != NULL) |
1403 { | |
1404 vim_free(buf->b_ml.ml_stack); | |
1405 vim_free(buf); | |
1406 } | |
7 | 1407 if (serious_error && called_from_main) |
1408 ml_close(curbuf, TRUE); | |
1409 #ifdef FEAT_AUTOCMD | |
1410 else | |
1411 { | |
1412 apply_autocmds(EVENT_BUFREADPOST, NULL, curbuf->b_fname, FALSE, curbuf); | |
1413 apply_autocmds(EVENT_BUFWINENTER, NULL, curbuf->b_fname, FALSE, curbuf); | |
1414 } | |
1415 #endif | |
1416 return; | |
1417 } | |
1418 | |
1419 /* | |
1420 * Find the names of swap files in current directory and the directory given | |
1421 * with the 'directory' option. | |
1422 * | |
1423 * Used to: | |
1424 * - list the swap files for "vim -r" | |
1425 * - count the number of swap files when recovering | |
1426 * - list the swap files when recovering | |
1427 * - find the name of the n'th swap file when recovering | |
1428 */ | |
1429 int | |
1430 recover_names(fname, list, nr) | |
1431 char_u **fname; /* base for swap file name */ | |
1432 int list; /* when TRUE, list the swap file names */ | |
1433 int nr; /* when non-zero, return nr'th swap file name */ | |
1434 { | |
1435 int num_names; | |
1436 char_u *(names[6]); | |
1437 char_u *tail; | |
1438 char_u *p; | |
1439 int num_files; | |
1440 int file_count = 0; | |
1441 char_u **files; | |
1442 int i; | |
1443 char_u *dirp; | |
1444 char_u *dir_name; | |
2145
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1445 char_u *fname_res = *fname; |
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1446 #ifdef HAVE_READLINK |
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1447 char_u fname_buf[MAXPATHL]; |
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1448 |
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1449 /* Expand symlink in the file name, because the swap file is created with |
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1450 * the actual file instead of with the symlink. */ |
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1451 if (resolve_symlink(*fname, fname_buf) == OK) |
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1452 fname_res = fname_buf; |
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1453 #endif |
7 | 1454 |
1455 if (list) | |
1456 { | |
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1457 /* use msg() to start the scrolling properly */ |
7 | 1458 msg((char_u *)_("Swap files found:")); |
1459 msg_putchar('\n'); | |
1460 } | |
1461 | |
1462 /* | |
1463 * Do the loop for every directory in 'directory'. | |
1464 * First allocate some memory to put the directory name in. | |
1465 */ | |
1466 dir_name = alloc((unsigned)STRLEN(p_dir) + 1); | |
1467 dirp = p_dir; | |
1468 while (dir_name != NULL && *dirp) | |
1469 { | |
1470 /* | |
1471 * Isolate a directory name from *dirp and put it in dir_name (we know | |
1472 * it is large enough, so use 31000 for length). | |
1473 * Advance dirp to next directory name. | |
1474 */ | |
1475 (void)copy_option_part(&dirp, dir_name, 31000, ","); | |
1476 | |
1477 if (dir_name[0] == '.' && dir_name[1] == NUL) /* check current dir */ | |
1478 { | |
1479 if (fname == NULL || *fname == NULL) | |
1480 { | |
1481 #ifdef VMS | |
1482 names[0] = vim_strsave((char_u *)"*_sw%"); | |
1483 #else | |
1484 # ifdef RISCOS | |
1485 names[0] = vim_strsave((char_u *)"*_sw#"); | |
1486 # else | |
1487 names[0] = vim_strsave((char_u *)"*.sw?"); | |
1488 # endif | |
1489 #endif | |
1005 | 1490 #if defined(UNIX) || defined(WIN3264) |
1491 /* For Unix names starting with a dot are special. MS-Windows | |
1492 * supports this too, on some file systems. */ | |
7 | 1493 names[1] = vim_strsave((char_u *)".*.sw?"); |
1494 names[2] = vim_strsave((char_u *)".sw?"); | |
1495 num_names = 3; | |
1496 #else | |
1497 # ifdef VMS | |
1498 names[1] = vim_strsave((char_u *)".*_sw%"); | |
1499 num_names = 2; | |
1500 # else | |
1501 num_names = 1; | |
1502 # endif | |
1503 #endif | |
1504 } | |
1505 else | |
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1506 num_names = recov_file_names(names, fname_res, TRUE); |
7 | 1507 } |
1508 else /* check directory dir_name */ | |
1509 { | |
1510 if (fname == NULL || *fname == NULL) | |
1511 { | |
1512 #ifdef VMS | |
1513 names[0] = concat_fnames(dir_name, (char_u *)"*_sw%", TRUE); | |
1514 #else | |
1515 # ifdef RISCOS | |
1516 names[0] = concat_fnames(dir_name, (char_u *)"*_sw#", TRUE); | |
1517 # else | |
1518 names[0] = concat_fnames(dir_name, (char_u *)"*.sw?", TRUE); | |
1519 # endif | |
1520 #endif | |
1005 | 1521 #if defined(UNIX) || defined(WIN3264) |
1522 /* For Unix names starting with a dot are special. MS-Windows | |
1523 * supports this too, on some file systems. */ | |
7 | 1524 names[1] = concat_fnames(dir_name, (char_u *)".*.sw?", TRUE); |
1525 names[2] = concat_fnames(dir_name, (char_u *)".sw?", TRUE); | |
1526 num_names = 3; | |
1527 #else | |
1528 # ifdef VMS | |
1529 names[1] = concat_fnames(dir_name, (char_u *)".*_sw%", TRUE); | |
1530 num_names = 2; | |
1531 # else | |
1532 num_names = 1; | |
1533 # endif | |
1534 #endif | |
1535 } | |
1536 else | |
1537 { | |
1538 #if defined(UNIX) || defined(WIN3264) | |
1539 p = dir_name + STRLEN(dir_name); | |
39 | 1540 if (after_pathsep(dir_name, p) && p[-1] == p[-2]) |
7 | 1541 { |
1542 /* Ends with '//', Use Full path for swap name */ | |
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1543 tail = make_percent_swname(dir_name, fname_res); |
7 | 1544 } |
1545 else | |
1546 #endif | |
1547 { | |
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1548 tail = gettail(fname_res); |
7 | 1549 tail = concat_fnames(dir_name, tail, TRUE); |
1550 } | |
1551 if (tail == NULL) | |
1552 num_names = 0; | |
1553 else | |
1554 { | |
1555 num_names = recov_file_names(names, tail, FALSE); | |
1556 vim_free(tail); | |
1557 } | |
1558 } | |
1559 } | |
1560 | |
1561 /* check for out-of-memory */ | |
1562 for (i = 0; i < num_names; ++i) | |
1563 { | |
1564 if (names[i] == NULL) | |
1565 { | |
1566 for (i = 0; i < num_names; ++i) | |
1567 vim_free(names[i]); | |
1568 num_names = 0; | |
1569 } | |
1570 } | |
1571 if (num_names == 0) | |
1572 num_files = 0; | |
1573 else if (expand_wildcards(num_names, names, &num_files, &files, | |
1574 EW_KEEPALL|EW_FILE|EW_SILENT) == FAIL) | |
1575 num_files = 0; | |
1576 | |
1577 /* | |
1578 * When no swap file found, wildcard expansion might have failed (e.g. | |
1579 * not able to execute the shell). | |
1580 * Try finding a swap file by simply adding ".swp" to the file name. | |
1581 */ | |
1582 if (*dirp == NUL && file_count + num_files == 0 | |
1583 && fname != NULL && *fname != NULL) | |
1584 { | |
1585 struct stat st; | |
1586 char_u *swapname; | |
1587 | |
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1588 swapname = modname(fname_res, |
7 | 1589 #if defined(VMS) || defined(RISCOS) |
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1590 (char_u *)"_swp", FALSE |
7 | 1591 #else |
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1592 (char_u *)".swp", TRUE |
7 | 1593 #endif |
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1594 ); |
7 | 1595 if (swapname != NULL) |
1596 { | |
1597 if (mch_stat((char *)swapname, &st) != -1) /* It exists! */ | |
1598 { | |
1599 files = (char_u **)alloc((unsigned)sizeof(char_u *)); | |
1600 if (files != NULL) | |
1601 { | |
1602 files[0] = swapname; | |
1603 swapname = NULL; | |
1604 num_files = 1; | |
1605 } | |
1606 } | |
1607 vim_free(swapname); | |
1608 } | |
1609 } | |
1610 | |
1611 /* | |
1612 * remove swapfile name of the current buffer, it must be ignored | |
1613 */ | |
1614 if (curbuf->b_ml.ml_mfp != NULL | |
1615 && (p = curbuf->b_ml.ml_mfp->mf_fname) != NULL) | |
1616 { | |
1617 for (i = 0; i < num_files; ++i) | |
1618 if (fullpathcmp(p, files[i], TRUE) & FPC_SAME) | |
1619 { | |
1855 | 1620 /* Remove the name from files[i]. Move further entries |
1621 * down. When the array becomes empty free it here, since | |
1622 * FreeWild() won't be called below. */ | |
7 | 1623 vim_free(files[i]); |
1855 | 1624 if (--num_files == 0) |
1625 vim_free(files); | |
1626 else | |
1627 for ( ; i < num_files; ++i) | |
1628 files[i] = files[i + 1]; | |
7 | 1629 } |
1630 } | |
838 | 1631 if (nr > 0) |
7 | 1632 { |
1633 file_count += num_files; | |
1634 if (nr <= file_count) | |
1635 { | |
1636 *fname = vim_strsave(files[nr - 1 + num_files - file_count]); | |
1637 dirp = (char_u *)""; /* stop searching */ | |
1638 } | |
1639 } | |
1640 else if (list) | |
1641 { | |
1642 if (dir_name[0] == '.' && dir_name[1] == NUL) | |
1643 { | |
1644 if (fname == NULL || *fname == NULL) | |
1645 MSG_PUTS(_(" In current directory:\n")); | |
1646 else | |
1647 MSG_PUTS(_(" Using specified name:\n")); | |
1648 } | |
1649 else | |
1650 { | |
1651 MSG_PUTS(_(" In directory ")); | |
1652 msg_home_replace(dir_name); | |
1653 MSG_PUTS(":\n"); | |
1654 } | |
1655 | |
1656 if (num_files) | |
1657 { | |
1658 for (i = 0; i < num_files; ++i) | |
1659 { | |
1660 /* print the swap file name */ | |
1661 msg_outnum((long)++file_count); | |
1662 MSG_PUTS(". "); | |
1663 msg_puts(gettail(files[i])); | |
1664 msg_putchar('\n'); | |
1665 (void)swapfile_info(files[i]); | |
1666 } | |
1667 } | |
1668 else | |
1669 MSG_PUTS(_(" -- none --\n")); | |
1670 out_flush(); | |
1671 } | |
1672 else | |
1673 file_count += num_files; | |
1674 | |
1675 for (i = 0; i < num_names; ++i) | |
1676 vim_free(names[i]); | |
838 | 1677 if (num_files > 0) |
1678 FreeWild(num_files, files); | |
7 | 1679 } |
1680 vim_free(dir_name); | |
1681 return file_count; | |
1682 } | |
1683 | |
1684 #if defined(UNIX) || defined(WIN3264) /* Need _very_ long file names */ | |
1685 /* | |
1686 * Append the full path to name with path separators made into percent | |
1687 * signs, to dir. An unnamed buffer is handled as "" (<currentdir>/"") | |
1688 */ | |
1689 static char_u * | |
1690 make_percent_swname(dir, name) | |
1691 char_u *dir; | |
1692 char_u *name; | |
1693 { | |
39 | 1694 char_u *d, *s, *f; |
7 | 1695 |
1696 f = fix_fname(name != NULL ? name : (char_u *) ""); | |
1697 d = NULL; | |
1698 if (f != NULL) | |
1699 { | |
1700 s = alloc((unsigned)(STRLEN(f) + 1)); | |
1701 if (s != NULL) | |
1702 { | |
39 | 1703 STRCPY(s, f); |
1704 for (d = s; *d != NUL; mb_ptr_adv(d)) | |
1705 if (vim_ispathsep(*d)) | |
1706 *d = '%'; | |
7 | 1707 d = concat_fnames(dir, s, TRUE); |
1708 vim_free(s); | |
1709 } | |
1710 vim_free(f); | |
1711 } | |
1712 return d; | |
1713 } | |
1714 #endif | |
1715 | |
1716 #if (defined(UNIX) || defined(__EMX__) || defined(VMS)) && (defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)) | |
1717 static int process_still_running; | |
1718 #endif | |
1719 | |
1720 /* | |
580 | 1721 * Give information about an existing swap file. |
7 | 1722 * Returns timestamp (0 when unknown). |
1723 */ | |
1724 static time_t | |
1725 swapfile_info(fname) | |
1726 char_u *fname; | |
1727 { | |
1728 struct stat st; | |
1729 int fd; | |
1730 struct block0 b0; | |
1731 time_t x = (time_t)0; | |
1001 | 1732 char *p; |
7 | 1733 #ifdef UNIX |
1734 char_u uname[B0_UNAME_SIZE]; | |
1735 #endif | |
1736 | |
1737 /* print the swap file date */ | |
1738 if (mch_stat((char *)fname, &st) != -1) | |
1739 { | |
1740 #ifdef UNIX | |
1741 /* print name of owner of the file */ | |
1742 if (mch_get_uname(st.st_uid, uname, B0_UNAME_SIZE) == OK) | |
1743 { | |
1744 MSG_PUTS(_(" owned by: ")); | |
1745 msg_outtrans(uname); | |
1746 MSG_PUTS(_(" dated: ")); | |
1747 } | |
1748 else | |
1749 #endif | |
1750 MSG_PUTS(_(" dated: ")); | |
1751 x = st.st_mtime; /* Manx C can't do &st.st_mtime */ | |
1001 | 1752 p = ctime(&x); /* includes '\n' */ |
1753 if (p == NULL) | |
1754 MSG_PUTS("(invalid)\n"); | |
1755 else | |
1756 MSG_PUTS(p); | |
7 | 1757 } |
1758 | |
1759 /* | |
1760 * print the original file name | |
1761 */ | |
1762 fd = mch_open((char *)fname, O_RDONLY | O_EXTRA, 0); | |
1763 if (fd >= 0) | |
1764 { | |
1765 if (read(fd, (char *)&b0, sizeof(b0)) == sizeof(b0)) | |
1766 { | |
1767 if (STRNCMP(b0.b0_version, "VIM 3.0", 7) == 0) | |
1768 { | |
1769 MSG_PUTS(_(" [from Vim version 3.0]")); | |
1770 } | |
1771 else if (b0.b0_id[0] != BLOCK0_ID0 || b0.b0_id[1] != BLOCK0_ID1) | |
1772 { | |
1773 MSG_PUTS(_(" [does not look like a Vim swap file]")); | |
1774 } | |
1775 else | |
1776 { | |
1777 MSG_PUTS(_(" file name: ")); | |
1778 if (b0.b0_fname[0] == NUL) | |
9 | 1779 MSG_PUTS(_("[No Name]")); |
7 | 1780 else |
1781 msg_outtrans(b0.b0_fname); | |
1782 | |
1783 MSG_PUTS(_("\n modified: ")); | |
1784 MSG_PUTS(b0.b0_dirty ? _("YES") : _("no")); | |
1785 | |
1786 if (*(b0.b0_uname) != NUL) | |
1787 { | |
1788 MSG_PUTS(_("\n user name: ")); | |
1789 msg_outtrans(b0.b0_uname); | |
1790 } | |
1791 | |
1792 if (*(b0.b0_hname) != NUL) | |
1793 { | |
1794 if (*(b0.b0_uname) != NUL) | |
1795 MSG_PUTS(_(" host name: ")); | |
1796 else | |
1797 MSG_PUTS(_("\n host name: ")); | |
1798 msg_outtrans(b0.b0_hname); | |
1799 } | |
1800 | |
1801 if (char_to_long(b0.b0_pid) != 0L) | |
1802 { | |
1803 MSG_PUTS(_("\n process ID: ")); | |
1804 msg_outnum(char_to_long(b0.b0_pid)); | |
1805 #if defined(UNIX) || defined(__EMX__) | |
1806 /* EMX kill() not working correctly, it seems */ | |
1807 if (kill((pid_t)char_to_long(b0.b0_pid), 0) == 0) | |
1808 { | |
1809 MSG_PUTS(_(" (still running)")); | |
1810 # if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG) | |
1811 process_still_running = TRUE; | |
1812 # endif | |
1813 } | |
1814 #endif | |
1815 } | |
1816 | |
1817 if (b0_magic_wrong(&b0)) | |
1818 { | |
1819 #if defined(MSDOS) || defined(MSWIN) | |
1820 if (STRNCMP(b0.b0_hname, "PC ", 3) == 0) | |
1821 MSG_PUTS(_("\n [not usable with this version of Vim]")); | |
1822 else | |
1823 #endif | |
1824 MSG_PUTS(_("\n [not usable on this computer]")); | |
1825 } | |
1826 } | |
1827 } | |
1828 else | |
1829 MSG_PUTS(_(" [cannot be read]")); | |
1830 close(fd); | |
1831 } | |
1832 else | |
1833 MSG_PUTS(_(" [cannot be opened]")); | |
1834 msg_putchar('\n'); | |
1835 | |
1836 return x; | |
1837 } | |
1838 | |
1839 static int | |
1840 recov_file_names(names, path, prepend_dot) | |
1841 char_u **names; | |
1842 char_u *path; | |
1843 int prepend_dot; | |
1844 { | |
1845 int num_names; | |
1846 | |
1847 #ifdef SHORT_FNAME | |
1848 /* | |
1849 * (MS-DOS) always short names | |
1850 */ | |
1851 names[0] = modname(path, (char_u *)".sw?", FALSE); | |
1852 num_names = 1; | |
1853 #else /* !SHORT_FNAME */ | |
1854 /* | |
1855 * (Win32 and Win64) never short names, but do prepend a dot. | |
1856 * (Not MS-DOS or Win32 or Win64) maybe short name, maybe not: Try both. | |
1857 * Only use the short name if it is different. | |
1858 */ | |
1859 char_u *p; | |
1860 int i; | |
1861 # ifndef WIN3264 | |
1862 int shortname = curbuf->b_shortname; | |
1863 | |
1864 curbuf->b_shortname = FALSE; | |
1865 # endif | |
1866 | |
1867 num_names = 0; | |
1868 | |
1869 /* | |
1870 * May also add the file name with a dot prepended, for swap file in same | |
1871 * dir as original file. | |
1872 */ | |
1873 if (prepend_dot) | |
1874 { | |
1875 names[num_names] = modname(path, (char_u *)".sw?", TRUE); | |
1876 if (names[num_names] == NULL) | |
1877 goto end; | |
1878 ++num_names; | |
1879 } | |
1880 | |
1881 /* | |
1882 * Form the normal swap file name pattern by appending ".sw?". | |
1883 */ | |
1884 #ifdef VMS | |
1885 names[num_names] = concat_fnames(path, (char_u *)"_sw%", FALSE); | |
1886 #else | |
1887 # ifdef RISCOS | |
1888 names[num_names] = concat_fnames(path, (char_u *)"_sw#", FALSE); | |
1889 # else | |
1890 names[num_names] = concat_fnames(path, (char_u *)".sw?", FALSE); | |
1891 # endif | |
1892 #endif | |
1893 if (names[num_names] == NULL) | |
1894 goto end; | |
1895 if (num_names >= 1) /* check if we have the same name twice */ | |
1896 { | |
1897 p = names[num_names - 1]; | |
1898 i = (int)STRLEN(names[num_names - 1]) - (int)STRLEN(names[num_names]); | |
1899 if (i > 0) | |
1900 p += i; /* file name has been expanded to full path */ | |
1901 | |
1902 if (STRCMP(p, names[num_names]) != 0) | |
1903 ++num_names; | |
1904 else | |
1905 vim_free(names[num_names]); | |
1906 } | |
1907 else | |
1908 ++num_names; | |
1909 | |
1910 # ifndef WIN3264 | |
1911 /* | |
1912 * Also try with 'shortname' set, in case the file is on a DOS filesystem. | |
1913 */ | |
1914 curbuf->b_shortname = TRUE; | |
1915 #ifdef VMS | |
1916 names[num_names] = modname(path, (char_u *)"_sw%", FALSE); | |
1917 #else | |
1918 # ifdef RISCOS | |
1919 names[num_names] = modname(path, (char_u *)"_sw#", FALSE); | |
1920 # else | |
1921 names[num_names] = modname(path, (char_u *)".sw?", FALSE); | |
1922 # endif | |
1923 #endif | |
1924 if (names[num_names] == NULL) | |
1925 goto end; | |
1926 | |
1927 /* | |
1928 * Remove the one from 'shortname', if it's the same as with 'noshortname'. | |
1929 */ | |
1930 p = names[num_names]; | |
1931 i = STRLEN(names[num_names]) - STRLEN(names[num_names - 1]); | |
1932 if (i > 0) | |
1933 p += i; /* file name has been expanded to full path */ | |
1934 if (STRCMP(names[num_names - 1], p) == 0) | |
1935 vim_free(names[num_names]); | |
1936 else | |
1937 ++num_names; | |
1938 # endif | |
1939 | |
1940 end: | |
1941 # ifndef WIN3264 | |
1942 curbuf->b_shortname = shortname; | |
1943 # endif | |
1944 | |
1945 #endif /* !SHORT_FNAME */ | |
1946 | |
1947 return num_names; | |
1948 } | |
1949 | |
1950 /* | |
1951 * sync all memlines | |
1952 * | |
1953 * If 'check_file' is TRUE, check if original file exists and was not changed. | |
1954 * If 'check_char' is TRUE, stop syncing when character becomes available, but | |
1955 * always sync at least one block. | |
1956 */ | |
1957 void | |
1958 ml_sync_all(check_file, check_char) | |
1959 int check_file; | |
1960 int check_char; | |
1961 { | |
1962 buf_T *buf; | |
1963 struct stat st; | |
1964 | |
1965 for (buf = firstbuf; buf != NULL; buf = buf->b_next) | |
1966 { | |
1967 if (buf->b_ml.ml_mfp == NULL || buf->b_ml.ml_mfp->mf_fname == NULL) | |
1968 continue; /* no file */ | |
1969 | |
1970 ml_flush_line(buf); /* flush buffered line */ | |
1971 /* flush locked block */ | |
1972 (void)ml_find_line(buf, (linenr_T)0, ML_FLUSH); | |
1973 if (bufIsChanged(buf) && check_file && mf_need_trans(buf->b_ml.ml_mfp) | |
1974 && buf->b_ffname != NULL) | |
1975 { | |
1976 /* | |
1977 * If the original file does not exist anymore or has been changed | |
1978 * call ml_preserve() to get rid of all negative numbered blocks. | |
1979 */ | |
1980 if (mch_stat((char *)buf->b_ffname, &st) == -1 | |
1981 || st.st_mtime != buf->b_mtime_read | |
1982 || (size_t)st.st_size != buf->b_orig_size) | |
1983 { | |
1984 ml_preserve(buf, FALSE); | |
1985 did_check_timestamps = FALSE; | |
1986 need_check_timestamps = TRUE; /* give message later */ | |
1987 } | |
1988 } | |
1989 if (buf->b_ml.ml_mfp->mf_dirty) | |
1990 { | |
1991 (void)mf_sync(buf->b_ml.ml_mfp, (check_char ? MFS_STOP : 0) | |
1992 | (bufIsChanged(buf) ? MFS_FLUSH : 0)); | |
1993 if (check_char && ui_char_avail()) /* character available now */ | |
1994 break; | |
1995 } | |
1996 } | |
1997 } | |
1998 | |
1999 /* | |
2000 * sync one buffer, including negative blocks | |
2001 * | |
2002 * after this all the blocks are in the swap file | |
2003 * | |
2004 * Used for the :preserve command and when the original file has been | |
2005 * changed or deleted. | |
2006 * | |
2007 * when message is TRUE the success of preserving is reported | |
2008 */ | |
2009 void | |
2010 ml_preserve(buf, message) | |
2011 buf_T *buf; | |
2012 int message; | |
2013 { | |
2014 bhdr_T *hp; | |
2015 linenr_T lnum; | |
2016 memfile_T *mfp = buf->b_ml.ml_mfp; | |
2017 int status; | |
2018 int got_int_save = got_int; | |
2019 | |
2020 if (mfp == NULL || mfp->mf_fname == NULL) | |
2021 { | |
2022 if (message) | |
2023 EMSG(_("E313: Cannot preserve, there is no swap file")); | |
2024 return; | |
2025 } | |
2026 | |
2027 /* We only want to stop when interrupted here, not when interrupted | |
2028 * before. */ | |
2029 got_int = FALSE; | |
2030 | |
2031 ml_flush_line(buf); /* flush buffered line */ | |
2032 (void)ml_find_line(buf, (linenr_T)0, ML_FLUSH); /* flush locked block */ | |
2033 status = mf_sync(mfp, MFS_ALL | MFS_FLUSH); | |
2034 | |
2035 /* stack is invalid after mf_sync(.., MFS_ALL) */ | |
2036 buf->b_ml.ml_stack_top = 0; | |
2037 | |
2038 /* | |
2039 * Some of the data blocks may have been changed from negative to | |
2040 * positive block number. In that case the pointer blocks need to be | |
2041 * updated. | |
2042 * | |
2043 * We don't know in which pointer block the references are, so we visit | |
2044 * all data blocks until there are no more translations to be done (or | |
2045 * we hit the end of the file, which can only happen in case a write fails, | |
2046 * e.g. when file system if full). | |
2047 * ml_find_line() does the work by translating the negative block numbers | |
2048 * when getting the first line of each data block. | |
2049 */ | |
2050 if (mf_need_trans(mfp) && !got_int) | |
2051 { | |
2052 lnum = 1; | |
2053 while (mf_need_trans(mfp) && lnum <= buf->b_ml.ml_line_count) | |
2054 { | |
2055 hp = ml_find_line(buf, lnum, ML_FIND); | |
2056 if (hp == NULL) | |
2057 { | |
2058 status = FAIL; | |
2059 goto theend; | |
2060 } | |
2061 CHECK(buf->b_ml.ml_locked_low != lnum, "low != lnum"); | |
2062 lnum = buf->b_ml.ml_locked_high + 1; | |
2063 } | |
2064 (void)ml_find_line(buf, (linenr_T)0, ML_FLUSH); /* flush locked block */ | |
2065 /* sync the updated pointer blocks */ | |
2066 if (mf_sync(mfp, MFS_ALL | MFS_FLUSH) == FAIL) | |
2067 status = FAIL; | |
2068 buf->b_ml.ml_stack_top = 0; /* stack is invalid now */ | |
2069 } | |
2070 theend: | |
2071 got_int |= got_int_save; | |
2072 | |
2073 if (message) | |
2074 { | |
2075 if (status == OK) | |
2076 MSG(_("File preserved")); | |
2077 else | |
2078 EMSG(_("E314: Preserve failed")); | |
2079 } | |
2080 } | |
2081 | |
2082 /* | |
2083 * NOTE: The pointer returned by the ml_get_*() functions only remains valid | |
2084 * until the next call! | |
2085 * line1 = ml_get(1); | |
2086 * line2 = ml_get(2); // line1 is now invalid! | |
2087 * Make a copy of the line if necessary. | |
2088 */ | |
2089 /* | |
2090 * get a pointer to a (read-only copy of a) line | |
2091 * | |
2092 * On failure an error message is given and IObuff is returned (to avoid | |
2093 * having to check for error everywhere). | |
2094 */ | |
2095 char_u * | |
2096 ml_get(lnum) | |
2097 linenr_T lnum; | |
2098 { | |
2099 return ml_get_buf(curbuf, lnum, FALSE); | |
2100 } | |
2101 | |
2102 /* | |
2103 * ml_get_pos: get pointer to position 'pos' | |
2104 */ | |
2105 char_u * | |
2106 ml_get_pos(pos) | |
2107 pos_T *pos; | |
2108 { | |
2109 return (ml_get_buf(curbuf, pos->lnum, FALSE) + pos->col); | |
2110 } | |
2111 | |
2112 /* | |
2113 * ml_get_curline: get pointer to cursor line. | |
2114 */ | |
2115 char_u * | |
2116 ml_get_curline() | |
2117 { | |
2118 return ml_get_buf(curbuf, curwin->w_cursor.lnum, FALSE); | |
2119 } | |
2120 | |
2121 /* | |
2122 * ml_get_cursor: get pointer to cursor position | |
2123 */ | |
2124 char_u * | |
2125 ml_get_cursor() | |
2126 { | |
2127 return (ml_get_buf(curbuf, curwin->w_cursor.lnum, FALSE) + | |
2128 curwin->w_cursor.col); | |
2129 } | |
2130 | |
2131 /* | |
2132 * get a pointer to a line in a specific buffer | |
2133 * | |
2134 * "will_change": if TRUE mark the buffer dirty (chars in the line will be | |
2135 * changed) | |
2136 */ | |
2137 char_u * | |
2138 ml_get_buf(buf, lnum, will_change) | |
2139 buf_T *buf; | |
2140 linenr_T lnum; | |
2141 int will_change; /* line will be changed */ | |
2142 { | |
1068 | 2143 bhdr_T *hp; |
2144 DATA_BL *dp; | |
2145 char_u *ptr; | |
2146 static int recursive = 0; | |
7 | 2147 |
2148 if (lnum > buf->b_ml.ml_line_count) /* invalid line number */ | |
2149 { | |
1068 | 2150 if (recursive == 0) |
2151 { | |
2152 /* Avoid giving this message for a recursive call, may happen when | |
2153 * the GUI redraws part of the text. */ | |
2154 ++recursive; | |
2155 EMSGN(_("E315: ml_get: invalid lnum: %ld"), lnum); | |
2156 --recursive; | |
2157 } | |
7 | 2158 errorret: |
2159 STRCPY(IObuff, "???"); | |
2160 return IObuff; | |
2161 } | |
2162 if (lnum <= 0) /* pretend line 0 is line 1 */ | |
2163 lnum = 1; | |
2164 | |
2165 if (buf->b_ml.ml_mfp == NULL) /* there are no lines */ | |
2166 return (char_u *)""; | |
2167 | |
2108
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|
2168 /* |
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parents:
2075
diff
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|
2169 * See if it is the same line as requested last time. |
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Bram Moolenaar <bram@zimbu.org>
parents:
2075
diff
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|
2170 * Otherwise may need to flush last used line. |
3cdf2a653e00
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Bram Moolenaar <bram@zimbu.org>
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2075
diff
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|
2171 * Don't use the last used line when 'swapfile' is reset, need to load all |
3cdf2a653e00
updated for version 7.2.391
Bram Moolenaar <bram@zimbu.org>
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diff
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|
2172 * blocks. |
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diff
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|
2173 */ |
1066 | 2174 if (buf->b_ml.ml_line_lnum != lnum || mf_dont_release) |
7 | 2175 { |
2176 ml_flush_line(buf); | |
2177 | |
2178 /* | |
2179 * Find the data block containing the line. | |
2180 * This also fills the stack with the blocks from the root to the data | |
2181 * block and releases any locked block. | |
2182 */ | |
2183 if ((hp = ml_find_line(buf, lnum, ML_FIND)) == NULL) | |
2184 { | |
1068 | 2185 if (recursive == 0) |
2186 { | |
2187 /* Avoid giving this message for a recursive call, may happen | |
2188 * when the GUI redraws part of the text. */ | |
2189 ++recursive; | |
2190 EMSGN(_("E316: ml_get: cannot find line %ld"), lnum); | |
2191 --recursive; | |
2192 } | |
7 | 2193 goto errorret; |
2194 } | |
2195 | |
2196 dp = (DATA_BL *)(hp->bh_data); | |
2197 | |
2198 ptr = (char_u *)dp + ((dp->db_index[lnum - buf->b_ml.ml_locked_low]) & DB_INDEX_MASK); | |
2199 buf->b_ml.ml_line_ptr = ptr; | |
2200 buf->b_ml.ml_line_lnum = lnum; | |
2201 buf->b_ml.ml_flags &= ~ML_LINE_DIRTY; | |
2202 } | |
2203 if (will_change) | |
2204 buf->b_ml.ml_flags |= (ML_LOCKED_DIRTY | ML_LOCKED_POS); | |
2205 | |
2206 return buf->b_ml.ml_line_ptr; | |
2207 } | |
2208 | |
2209 /* | |
2210 * Check if a line that was just obtained by a call to ml_get | |
2211 * is in allocated memory. | |
2212 */ | |
2213 int | |
2214 ml_line_alloced() | |
2215 { | |
2216 return (curbuf->b_ml.ml_flags & ML_LINE_DIRTY); | |
2217 } | |
2218 | |
2219 /* | |
2220 * Append a line after lnum (may be 0 to insert a line in front of the file). | |
2221 * "line" does not need to be allocated, but can't be another line in a | |
2222 * buffer, unlocking may make it invalid. | |
2223 * | |
2224 * newfile: TRUE when starting to edit a new file, meaning that pe_old_lnum | |
2225 * will be set for recovery | |
2226 * Check: The caller of this function should probably also call | |
2227 * appended_lines(). | |
2228 * | |
2229 * return FAIL for failure, OK otherwise | |
2230 */ | |
2231 int | |
2232 ml_append(lnum, line, len, newfile) | |
2233 linenr_T lnum; /* append after this line (can be 0) */ | |
2234 char_u *line; /* text of the new line */ | |
2235 colnr_T len; /* length of new line, including NUL, or 0 */ | |
2236 int newfile; /* flag, see above */ | |
2237 { | |
2238 /* When starting up, we might still need to create the memfile */ | |
2239 if (curbuf->b_ml.ml_mfp == NULL && open_buffer(FALSE, NULL) == FAIL) | |
2240 return FAIL; | |
2241 | |
2242 if (curbuf->b_ml.ml_line_lnum != 0) | |
2243 ml_flush_line(curbuf); | |
2244 return ml_append_int(curbuf, lnum, line, len, newfile, FALSE); | |
2245 } | |
2246 | |
748 | 2247 #if defined(FEAT_SPELL) || defined(PROTO) |
625 | 2248 /* |
2249 * Like ml_append() but for an arbitrary buffer. The buffer must already have | |
2250 * a memline. | |
2251 */ | |
2252 int | |
2253 ml_append_buf(buf, lnum, line, len, newfile) | |
2254 buf_T *buf; | |
2255 linenr_T lnum; /* append after this line (can be 0) */ | |
2256 char_u *line; /* text of the new line */ | |
2257 colnr_T len; /* length of new line, including NUL, or 0 */ | |
2258 int newfile; /* flag, see above */ | |
2259 { | |
2260 if (buf->b_ml.ml_mfp == NULL) | |
2261 return FAIL; | |
2262 | |
2263 if (buf->b_ml.ml_line_lnum != 0) | |
2264 ml_flush_line(buf); | |
2265 return ml_append_int(buf, lnum, line, len, newfile, FALSE); | |
2266 } | |
2267 #endif | |
2268 | |
7 | 2269 static int |
2270 ml_append_int(buf, lnum, line, len, newfile, mark) | |
2271 buf_T *buf; | |
2272 linenr_T lnum; /* append after this line (can be 0) */ | |
2273 char_u *line; /* text of the new line */ | |
2274 colnr_T len; /* length of line, including NUL, or 0 */ | |
2275 int newfile; /* flag, see above */ | |
2276 int mark; /* mark the new line */ | |
2277 { | |
2278 int i; | |
2279 int line_count; /* number of indexes in current block */ | |
2280 int offset; | |
2281 int from, to; | |
2282 int space_needed; /* space needed for new line */ | |
2283 int page_size; | |
2284 int page_count; | |
2285 int db_idx; /* index for lnum in data block */ | |
2286 bhdr_T *hp; | |
2287 memfile_T *mfp; | |
2288 DATA_BL *dp; | |
2289 PTR_BL *pp; | |
2290 infoptr_T *ip; | |
2291 | |
2292 /* lnum out of range */ | |
2293 if (lnum > buf->b_ml.ml_line_count || buf->b_ml.ml_mfp == NULL) | |
2294 return FAIL; | |
2295 | |
2296 if (lowest_marked && lowest_marked > lnum) | |
2297 lowest_marked = lnum + 1; | |
2298 | |
2299 if (len == 0) | |
2300 len = (colnr_T)STRLEN(line) + 1; /* space needed for the text */ | |
2301 space_needed = len + INDEX_SIZE; /* space needed for text + index */ | |
2302 | |
2303 mfp = buf->b_ml.ml_mfp; | |
2304 page_size = mfp->mf_page_size; | |
2305 | |
2306 /* | |
2307 * find the data block containing the previous line | |
2308 * This also fills the stack with the blocks from the root to the data block | |
2309 * This also releases any locked block. | |
2310 */ | |
2311 if ((hp = ml_find_line(buf, lnum == 0 ? (linenr_T)1 : lnum, | |
2312 ML_INSERT)) == NULL) | |
2313 return FAIL; | |
2314 | |
2315 buf->b_ml.ml_flags &= ~ML_EMPTY; | |
2316 | |
2317 if (lnum == 0) /* got line one instead, correct db_idx */ | |
2318 db_idx = -1; /* careful, it is negative! */ | |
2319 else | |
2320 db_idx = lnum - buf->b_ml.ml_locked_low; | |
2321 /* get line count before the insertion */ | |
2322 line_count = buf->b_ml.ml_locked_high - buf->b_ml.ml_locked_low; | |
2323 | |
2324 dp = (DATA_BL *)(hp->bh_data); | |
2325 | |
2326 /* | |
2327 * If | |
2328 * - there is not enough room in the current block | |
2329 * - appending to the last line in the block | |
2330 * - not appending to the last line in the file | |
2331 * insert in front of the next block. | |
2332 */ | |
2333 if ((int)dp->db_free < space_needed && db_idx == line_count - 1 | |
2334 && lnum < buf->b_ml.ml_line_count) | |
2335 { | |
2336 /* | |
2337 * Now that the line is not going to be inserted in the block that we | |
2338 * expected, the line count has to be adjusted in the pointer blocks | |
2339 * by using ml_locked_lineadd. | |
2340 */ | |
2341 --(buf->b_ml.ml_locked_lineadd); | |
2342 --(buf->b_ml.ml_locked_high); | |
2343 if ((hp = ml_find_line(buf, lnum + 1, ML_INSERT)) == NULL) | |
2344 return FAIL; | |
2345 | |
2346 db_idx = -1; /* careful, it is negative! */ | |
2347 /* get line count before the insertion */ | |
2348 line_count = buf->b_ml.ml_locked_high - buf->b_ml.ml_locked_low; | |
2349 CHECK(buf->b_ml.ml_locked_low != lnum + 1, "locked_low != lnum + 1"); | |
2350 | |
2351 dp = (DATA_BL *)(hp->bh_data); | |
2352 } | |
2353 | |
2354 ++buf->b_ml.ml_line_count; | |
2355 | |
2356 if ((int)dp->db_free >= space_needed) /* enough room in data block */ | |
2357 { | |
2358 /* | |
2359 * Insert new line in existing data block, or in data block allocated above. | |
2360 */ | |
2361 dp->db_txt_start -= len; | |
2362 dp->db_free -= space_needed; | |
2363 ++(dp->db_line_count); | |
2364 | |
2365 /* | |
2366 * move the text of the lines that follow to the front | |
2367 * adjust the indexes of the lines that follow | |
2368 */ | |
2369 if (line_count > db_idx + 1) /* if there are following lines */ | |
2370 { | |
2371 /* | |
2372 * Offset is the start of the previous line. | |
2373 * This will become the character just after the new line. | |
2374 */ | |
2375 if (db_idx < 0) | |
2376 offset = dp->db_txt_end; | |
2377 else | |
2378 offset = ((dp->db_index[db_idx]) & DB_INDEX_MASK); | |
2379 mch_memmove((char *)dp + dp->db_txt_start, | |
2380 (char *)dp + dp->db_txt_start + len, | |
2381 (size_t)(offset - (dp->db_txt_start + len))); | |
2382 for (i = line_count - 1; i > db_idx; --i) | |
2383 dp->db_index[i + 1] = dp->db_index[i] - len; | |
2384 dp->db_index[db_idx + 1] = offset - len; | |
2385 } | |
2386 else /* add line at the end */ | |
2387 dp->db_index[db_idx + 1] = dp->db_txt_start; | |
2388 | |
2389 /* | |
2390 * copy the text into the block | |
2391 */ | |
2392 mch_memmove((char *)dp + dp->db_index[db_idx + 1], line, (size_t)len); | |
2393 if (mark) | |
2394 dp->db_index[db_idx + 1] |= DB_MARKED; | |
2395 | |
2396 /* | |
2397 * Mark the block dirty. | |
2398 */ | |
2399 buf->b_ml.ml_flags |= ML_LOCKED_DIRTY; | |
2400 if (!newfile) | |
2401 buf->b_ml.ml_flags |= ML_LOCKED_POS; | |
2402 } | |
2403 else /* not enough space in data block */ | |
2404 { | |
2405 /* | |
2406 * If there is not enough room we have to create a new data block and copy some | |
2407 * lines into it. | |
2408 * Then we have to insert an entry in the pointer block. | |
2409 * If this pointer block also is full, we go up another block, and so on, up | |
2410 * to the root if necessary. | |
2411 * The line counts in the pointer blocks have already been adjusted by | |
2412 * ml_find_line(). | |
2413 */ | |
2414 long line_count_left, line_count_right; | |
2415 int page_count_left, page_count_right; | |
2416 bhdr_T *hp_left; | |
2417 bhdr_T *hp_right; | |
2418 bhdr_T *hp_new; | |
2419 int lines_moved; | |
2420 int data_moved = 0; /* init to shut up gcc */ | |
2421 int total_moved = 0; /* init to shut up gcc */ | |
2422 DATA_BL *dp_right, *dp_left; | |
2423 int stack_idx; | |
2424 int in_left; | |
2425 int lineadd; | |
2426 blocknr_T bnum_left, bnum_right; | |
2427 linenr_T lnum_left, lnum_right; | |
2428 int pb_idx; | |
2429 PTR_BL *pp_new; | |
2430 | |
2431 /* | |
2432 * We are going to allocate a new data block. Depending on the | |
2433 * situation it will be put to the left or right of the existing | |
2434 * block. If possible we put the new line in the left block and move | |
2435 * the lines after it to the right block. Otherwise the new line is | |
2436 * also put in the right block. This method is more efficient when | |
2437 * inserting a lot of lines at one place. | |
2438 */ | |
2439 if (db_idx < 0) /* left block is new, right block is existing */ | |
2440 { | |
2441 lines_moved = 0; | |
2442 in_left = TRUE; | |
2443 /* space_needed does not change */ | |
2444 } | |
2445 else /* left block is existing, right block is new */ | |
2446 { | |
2447 lines_moved = line_count - db_idx - 1; | |
2448 if (lines_moved == 0) | |
2449 in_left = FALSE; /* put new line in right block */ | |
2450 /* space_needed does not change */ | |
2451 else | |
2452 { | |
2453 data_moved = ((dp->db_index[db_idx]) & DB_INDEX_MASK) - | |
2454 dp->db_txt_start; | |
2455 total_moved = data_moved + lines_moved * INDEX_SIZE; | |
2456 if ((int)dp->db_free + total_moved >= space_needed) | |
2457 { | |
2458 in_left = TRUE; /* put new line in left block */ | |
2459 space_needed = total_moved; | |
2460 } | |
2461 else | |
2462 { | |
2463 in_left = FALSE; /* put new line in right block */ | |
2464 space_needed += total_moved; | |
2465 } | |
2466 } | |
2467 } | |
2468 | |
2469 page_count = ((space_needed + HEADER_SIZE) + page_size - 1) / page_size; | |
2470 if ((hp_new = ml_new_data(mfp, newfile, page_count)) == NULL) | |
2471 { | |
2472 /* correct line counts in pointer blocks */ | |
2473 --(buf->b_ml.ml_locked_lineadd); | |
2474 --(buf->b_ml.ml_locked_high); | |
2475 return FAIL; | |
2476 } | |
2477 if (db_idx < 0) /* left block is new */ | |
2478 { | |
2479 hp_left = hp_new; | |
2480 hp_right = hp; | |
2481 line_count_left = 0; | |
2482 line_count_right = line_count; | |
2483 } | |
2484 else /* right block is new */ | |
2485 { | |
2486 hp_left = hp; | |
2487 hp_right = hp_new; | |
2488 line_count_left = line_count; | |
2489 line_count_right = 0; | |
2490 } | |
2491 dp_right = (DATA_BL *)(hp_right->bh_data); | |
2492 dp_left = (DATA_BL *)(hp_left->bh_data); | |
2493 bnum_left = hp_left->bh_bnum; | |
2494 bnum_right = hp_right->bh_bnum; | |
2495 page_count_left = hp_left->bh_page_count; | |
2496 page_count_right = hp_right->bh_page_count; | |
2497 | |
2498 /* | |
2499 * May move the new line into the right/new block. | |
2500 */ | |
2501 if (!in_left) | |
2502 { | |
2503 dp_right->db_txt_start -= len; | |
2504 dp_right->db_free -= len + INDEX_SIZE; | |
2505 dp_right->db_index[0] = dp_right->db_txt_start; | |
2506 if (mark) | |
2507 dp_right->db_index[0] |= DB_MARKED; | |
2508 | |
2509 mch_memmove((char *)dp_right + dp_right->db_txt_start, | |
2510 line, (size_t)len); | |
2511 ++line_count_right; | |
2512 } | |
2513 /* | |
2514 * may move lines from the left/old block to the right/new one. | |
2515 */ | |
2516 if (lines_moved) | |
2517 { | |
2518 /* | |
2519 */ | |
2520 dp_right->db_txt_start -= data_moved; | |
2521 dp_right->db_free -= total_moved; | |
2522 mch_memmove((char *)dp_right + dp_right->db_txt_start, | |
2523 (char *)dp_left + dp_left->db_txt_start, | |
2524 (size_t)data_moved); | |
2525 offset = dp_right->db_txt_start - dp_left->db_txt_start; | |
2526 dp_left->db_txt_start += data_moved; | |
2527 dp_left->db_free += total_moved; | |
2528 | |
2529 /* | |
2530 * update indexes in the new block | |
2531 */ | |
2532 for (to = line_count_right, from = db_idx + 1; | |
2533 from < line_count_left; ++from, ++to) | |
2534 dp_right->db_index[to] = dp->db_index[from] + offset; | |
2535 line_count_right += lines_moved; | |
2536 line_count_left -= lines_moved; | |
2537 } | |
2538 | |
2539 /* | |
2540 * May move the new line into the left (old or new) block. | |
2541 */ | |
2542 if (in_left) | |
2543 { | |
2544 dp_left->db_txt_start -= len; | |
2545 dp_left->db_free -= len + INDEX_SIZE; | |
2546 dp_left->db_index[line_count_left] = dp_left->db_txt_start; | |
2547 if (mark) | |
2548 dp_left->db_index[line_count_left] |= DB_MARKED; | |
2549 mch_memmove((char *)dp_left + dp_left->db_txt_start, | |
2550 line, (size_t)len); | |
2551 ++line_count_left; | |
2552 } | |
2553 | |
2554 if (db_idx < 0) /* left block is new */ | |
2555 { | |
2556 lnum_left = lnum + 1; | |
2557 lnum_right = 0; | |
2558 } | |
2559 else /* right block is new */ | |
2560 { | |
2561 lnum_left = 0; | |
2562 if (in_left) | |
2563 lnum_right = lnum + 2; | |
2564 else | |
2565 lnum_right = lnum + 1; | |
2566 } | |
2567 dp_left->db_line_count = line_count_left; | |
2568 dp_right->db_line_count = line_count_right; | |
2569 | |
2570 /* | |
2571 * release the two data blocks | |
2572 * The new one (hp_new) already has a correct blocknumber. | |
2573 * The old one (hp, in ml_locked) gets a positive blocknumber if | |
2574 * we changed it and we are not editing a new file. | |
2575 */ | |
2576 if (lines_moved || in_left) | |
2577 buf->b_ml.ml_flags |= ML_LOCKED_DIRTY; | |
2578 if (!newfile && db_idx >= 0 && in_left) | |
2579 buf->b_ml.ml_flags |= ML_LOCKED_POS; | |
2580 mf_put(mfp, hp_new, TRUE, FALSE); | |
2581 | |
2582 /* | |
2583 * flush the old data block | |
2584 * set ml_locked_lineadd to 0, because the updating of the | |
2585 * pointer blocks is done below | |
2586 */ | |
2587 lineadd = buf->b_ml.ml_locked_lineadd; | |
2588 buf->b_ml.ml_locked_lineadd = 0; | |
2589 ml_find_line(buf, (linenr_T)0, ML_FLUSH); /* flush data block */ | |
2590 | |
2591 /* | |
2592 * update pointer blocks for the new data block | |
2593 */ | |
2594 for (stack_idx = buf->b_ml.ml_stack_top - 1; stack_idx >= 0; | |
2595 --stack_idx) | |
2596 { | |
2597 ip = &(buf->b_ml.ml_stack[stack_idx]); | |
2598 pb_idx = ip->ip_index; | |
2599 if ((hp = mf_get(mfp, ip->ip_bnum, 1)) == NULL) | |
2600 return FAIL; | |
2601 pp = (PTR_BL *)(hp->bh_data); /* must be pointer block */ | |
2602 if (pp->pb_id != PTR_ID) | |
2603 { | |
2604 EMSG(_("E317: pointer block id wrong 3")); | |
2605 mf_put(mfp, hp, FALSE, FALSE); | |
2606 return FAIL; | |
2607 } | |
2608 /* | |
2609 * TODO: If the pointer block is full and we are adding at the end | |
2610 * try to insert in front of the next block | |
2611 */ | |
2612 /* block not full, add one entry */ | |
2613 if (pp->pb_count < pp->pb_count_max) | |
2614 { | |
2615 if (pb_idx + 1 < (int)pp->pb_count) | |
2616 mch_memmove(&pp->pb_pointer[pb_idx + 2], | |
2617 &pp->pb_pointer[pb_idx + 1], | |
2618 (size_t)(pp->pb_count - pb_idx - 1) * sizeof(PTR_EN)); | |
2619 ++pp->pb_count; | |
2620 pp->pb_pointer[pb_idx].pe_line_count = line_count_left; | |
2621 pp->pb_pointer[pb_idx].pe_bnum = bnum_left; | |
2622 pp->pb_pointer[pb_idx].pe_page_count = page_count_left; | |
2623 pp->pb_pointer[pb_idx + 1].pe_line_count = line_count_right; | |
2624 pp->pb_pointer[pb_idx + 1].pe_bnum = bnum_right; | |
2625 pp->pb_pointer[pb_idx + 1].pe_page_count = page_count_right; | |
2626 | |
2627 if (lnum_left != 0) | |
2628 pp->pb_pointer[pb_idx].pe_old_lnum = lnum_left; | |
2629 if (lnum_right != 0) | |
2630 pp->pb_pointer[pb_idx + 1].pe_old_lnum = lnum_right; | |
2631 | |
2632 mf_put(mfp, hp, TRUE, FALSE); | |
2633 buf->b_ml.ml_stack_top = stack_idx + 1; /* truncate stack */ | |
2634 | |
2635 if (lineadd) | |
2636 { | |
2637 --(buf->b_ml.ml_stack_top); | |
1167 | 2638 /* fix line count for rest of blocks in the stack */ |
7 | 2639 ml_lineadd(buf, lineadd); |
2640 /* fix stack itself */ | |
2641 buf->b_ml.ml_stack[buf->b_ml.ml_stack_top].ip_high += | |
2642 lineadd; | |
2643 ++(buf->b_ml.ml_stack_top); | |
2644 } | |
2645 | |
2646 /* | |
2647 * We are finished, break the loop here. | |
2648 */ | |
2649 break; | |
2650 } | |
2651 else /* pointer block full */ | |
2652 { | |
2653 /* | |
2654 * split the pointer block | |
2655 * allocate a new pointer block | |
2656 * move some of the pointer into the new block | |
2657 * prepare for updating the parent block | |
2658 */ | |
2659 for (;;) /* do this twice when splitting block 1 */ | |
2660 { | |
2661 hp_new = ml_new_ptr(mfp); | |
2662 if (hp_new == NULL) /* TODO: try to fix tree */ | |
2663 return FAIL; | |
2664 pp_new = (PTR_BL *)(hp_new->bh_data); | |
2665 | |
2666 if (hp->bh_bnum != 1) | |
2667 break; | |
2668 | |
2669 /* | |
2670 * if block 1 becomes full the tree is given an extra level | |
2671 * The pointers from block 1 are moved into the new block. | |
2672 * block 1 is updated to point to the new block | |
2673 * then continue to split the new block | |
2674 */ | |
2675 mch_memmove(pp_new, pp, (size_t)page_size); | |
2676 pp->pb_count = 1; | |
2677 pp->pb_pointer[0].pe_bnum = hp_new->bh_bnum; | |
2678 pp->pb_pointer[0].pe_line_count = buf->b_ml.ml_line_count; | |
2679 pp->pb_pointer[0].pe_old_lnum = 1; | |
2680 pp->pb_pointer[0].pe_page_count = 1; | |
2681 mf_put(mfp, hp, TRUE, FALSE); /* release block 1 */ | |
2682 hp = hp_new; /* new block is to be split */ | |
2683 pp = pp_new; | |
2684 CHECK(stack_idx != 0, _("stack_idx should be 0")); | |
2685 ip->ip_index = 0; | |
2686 ++stack_idx; /* do block 1 again later */ | |
2687 } | |
2688 /* | |
2689 * move the pointers after the current one to the new block | |
2690 * If there are none, the new entry will be in the new block. | |
2691 */ | |
2692 total_moved = pp->pb_count - pb_idx - 1; | |
2693 if (total_moved) | |
2694 { | |
2695 mch_memmove(&pp_new->pb_pointer[0], | |
2696 &pp->pb_pointer[pb_idx + 1], | |
2697 (size_t)(total_moved) * sizeof(PTR_EN)); | |
2698 pp_new->pb_count = total_moved; | |
2699 pp->pb_count -= total_moved - 1; | |
2700 pp->pb_pointer[pb_idx + 1].pe_bnum = bnum_right; | |
2701 pp->pb_pointer[pb_idx + 1].pe_line_count = line_count_right; | |
2702 pp->pb_pointer[pb_idx + 1].pe_page_count = page_count_right; | |
2703 if (lnum_right) | |
2704 pp->pb_pointer[pb_idx + 1].pe_old_lnum = lnum_right; | |
2705 } | |
2706 else | |
2707 { | |
2708 pp_new->pb_count = 1; | |
2709 pp_new->pb_pointer[0].pe_bnum = bnum_right; | |
2710 pp_new->pb_pointer[0].pe_line_count = line_count_right; | |
2711 pp_new->pb_pointer[0].pe_page_count = page_count_right; | |
2712 pp_new->pb_pointer[0].pe_old_lnum = lnum_right; | |
2713 } | |
2714 pp->pb_pointer[pb_idx].pe_bnum = bnum_left; | |
2715 pp->pb_pointer[pb_idx].pe_line_count = line_count_left; | |
2716 pp->pb_pointer[pb_idx].pe_page_count = page_count_left; | |
2717 if (lnum_left) | |
2718 pp->pb_pointer[pb_idx].pe_old_lnum = lnum_left; | |
2719 lnum_left = 0; | |
2720 lnum_right = 0; | |
2721 | |
2722 /* | |
2723 * recompute line counts | |
2724 */ | |
2725 line_count_right = 0; | |
2726 for (i = 0; i < (int)pp_new->pb_count; ++i) | |
2727 line_count_right += pp_new->pb_pointer[i].pe_line_count; | |
2728 line_count_left = 0; | |
2729 for (i = 0; i < (int)pp->pb_count; ++i) | |
2730 line_count_left += pp->pb_pointer[i].pe_line_count; | |
2731 | |
2732 bnum_left = hp->bh_bnum; | |
2733 bnum_right = hp_new->bh_bnum; | |
2734 page_count_left = 1; | |
2735 page_count_right = 1; | |
2736 mf_put(mfp, hp, TRUE, FALSE); | |
2737 mf_put(mfp, hp_new, TRUE, FALSE); | |
2738 } | |
2739 } | |
2740 | |
2741 /* | |
2742 * Safety check: fallen out of for loop? | |
2743 */ | |
2744 if (stack_idx < 0) | |
2745 { | |
2746 EMSG(_("E318: Updated too many blocks?")); | |
2747 buf->b_ml.ml_stack_top = 0; /* invalidate stack */ | |
2748 } | |
2749 } | |
2750 | |
2751 #ifdef FEAT_BYTEOFF | |
2752 /* The line was inserted below 'lnum' */ | |
2753 ml_updatechunk(buf, lnum + 1, (long)len, ML_CHNK_ADDLINE); | |
2754 #endif | |
2755 #ifdef FEAT_NETBEANS_INTG | |
2756 if (usingNetbeans) | |
2757 { | |
2758 if (STRLEN(line) > 0) | |
835 | 2759 netbeans_inserted(buf, lnum+1, (colnr_T)0, line, (int)STRLEN(line)); |
34 | 2760 netbeans_inserted(buf, lnum+1, (colnr_T)STRLEN(line), |
7 | 2761 (char_u *)"\n", 1); |
2762 } | |
2763 #endif | |
2764 return OK; | |
2765 } | |
2766 | |
2767 /* | |
625 | 2768 * Replace line lnum, with buffering, in current buffer. |
7 | 2769 * |
720 | 2770 * If "copy" is TRUE, make a copy of the line, otherwise the line has been |
7 | 2771 * copied to allocated memory already. |
2772 * | |
2773 * Check: The caller of this function should probably also call | |
2774 * changed_lines(), unless update_screen(NOT_VALID) is used. | |
2775 * | |
2776 * return FAIL for failure, OK otherwise | |
2777 */ | |
2778 int | |
2779 ml_replace(lnum, line, copy) | |
2780 linenr_T lnum; | |
2781 char_u *line; | |
2782 int copy; | |
2783 { | |
2784 if (line == NULL) /* just checking... */ | |
2785 return FAIL; | |
2786 | |
2787 /* When starting up, we might still need to create the memfile */ | |
2788 if (curbuf->b_ml.ml_mfp == NULL && open_buffer(FALSE, NULL) == FAIL) | |
2789 return FAIL; | |
2790 | |
2791 if (copy && (line = vim_strsave(line)) == NULL) /* allocate memory */ | |
2792 return FAIL; | |
2793 #ifdef FEAT_NETBEANS_INTG | |
2794 if (usingNetbeans) | |
2795 { | |
2796 netbeans_removed(curbuf, lnum, 0, (long)STRLEN(ml_get(lnum))); | |
835 | 2797 netbeans_inserted(curbuf, lnum, 0, line, (int)STRLEN(line)); |
7 | 2798 } |
2799 #endif | |
2800 if (curbuf->b_ml.ml_line_lnum != lnum) /* other line buffered */ | |
2801 ml_flush_line(curbuf); /* flush it */ | |
2802 else if (curbuf->b_ml.ml_flags & ML_LINE_DIRTY) /* same line allocated */ | |
2803 vim_free(curbuf->b_ml.ml_line_ptr); /* free it */ | |
2804 curbuf->b_ml.ml_line_ptr = line; | |
2805 curbuf->b_ml.ml_line_lnum = lnum; | |
2806 curbuf->b_ml.ml_flags = (curbuf->b_ml.ml_flags | ML_LINE_DIRTY) & ~ML_EMPTY; | |
2807 | |
2808 return OK; | |
2809 } | |
2810 | |
2811 /* | |
625 | 2812 * Delete line 'lnum' in the current buffer. |
7 | 2813 * |
2814 * Check: The caller of this function should probably also call | |
2815 * deleted_lines() after this. | |
2816 * | |
2817 * return FAIL for failure, OK otherwise | |
2818 */ | |
2819 int | |
2820 ml_delete(lnum, message) | |
2821 linenr_T lnum; | |
2822 int message; | |
2823 { | |
2824 ml_flush_line(curbuf); | |
2825 return ml_delete_int(curbuf, lnum, message); | |
2826 } | |
2827 | |
2828 static int | |
2829 ml_delete_int(buf, lnum, message) | |
2830 buf_T *buf; | |
2831 linenr_T lnum; | |
2832 int message; | |
2833 { | |
2834 bhdr_T *hp; | |
2835 memfile_T *mfp; | |
2836 DATA_BL *dp; | |
2837 PTR_BL *pp; | |
2838 infoptr_T *ip; | |
2839 int count; /* number of entries in block */ | |
2840 int idx; | |
2841 int stack_idx; | |
2842 int text_start; | |
2843 int line_start; | |
2844 long line_size; | |
2845 int i; | |
2846 | |
2847 if (lnum < 1 || lnum > buf->b_ml.ml_line_count) | |
2848 return FAIL; | |
2849 | |
2850 if (lowest_marked && lowest_marked > lnum) | |
2851 lowest_marked--; | |
2852 | |
2853 /* | |
2854 * If the file becomes empty the last line is replaced by an empty line. | |
2855 */ | |
2856 if (buf->b_ml.ml_line_count == 1) /* file becomes empty */ | |
2857 { | |
2858 if (message | |
2859 #ifdef FEAT_NETBEANS_INTG | |
2860 && !netbeansSuppressNoLines | |
2861 #endif | |
2862 ) | |
680 | 2863 set_keep_msg((char_u *)_(no_lines_msg), 0); |
2864 | |
7 | 2865 /* FEAT_BYTEOFF already handled in there, dont worry 'bout it below */ |
2866 i = ml_replace((linenr_T)1, (char_u *)"", TRUE); | |
2867 buf->b_ml.ml_flags |= ML_EMPTY; | |
2868 | |
2869 return i; | |
2870 } | |
2871 | |
2872 /* | |
2873 * find the data block containing the line | |
2874 * This also fills the stack with the blocks from the root to the data block | |
2875 * This also releases any locked block. | |
2876 */ | |
2877 mfp = buf->b_ml.ml_mfp; | |
2878 if (mfp == NULL) | |
2879 return FAIL; | |
2880 | |
2881 if ((hp = ml_find_line(buf, lnum, ML_DELETE)) == NULL) | |
2882 return FAIL; | |
2883 | |
2884 dp = (DATA_BL *)(hp->bh_data); | |
2885 /* compute line count before the delete */ | |
2886 count = (long)(buf->b_ml.ml_locked_high) | |
2887 - (long)(buf->b_ml.ml_locked_low) + 2; | |
2888 idx = lnum - buf->b_ml.ml_locked_low; | |
2889 | |
2890 --buf->b_ml.ml_line_count; | |
2891 | |
2892 line_start = ((dp->db_index[idx]) & DB_INDEX_MASK); | |
2893 if (idx == 0) /* first line in block, text at the end */ | |
2894 line_size = dp->db_txt_end - line_start; | |
2895 else | |
2896 line_size = ((dp->db_index[idx - 1]) & DB_INDEX_MASK) - line_start; | |
2897 | |
2898 #ifdef FEAT_NETBEANS_INTG | |
2899 if (usingNetbeans) | |
34 | 2900 netbeans_removed(buf, lnum, 0, (long)line_size); |
7 | 2901 #endif |
2902 | |
2903 /* | |
2904 * special case: If there is only one line in the data block it becomes empty. | |
2905 * Then we have to remove the entry, pointing to this data block, from the | |
2906 * pointer block. If this pointer block also becomes empty, we go up another | |
2907 * block, and so on, up to the root if necessary. | |
2908 * The line counts in the pointer blocks have already been adjusted by | |
2909 * ml_find_line(). | |
2910 */ | |
2911 if (count == 1) | |
2912 { | |
2913 mf_free(mfp, hp); /* free the data block */ | |
2914 buf->b_ml.ml_locked = NULL; | |
2915 | |
2916 for (stack_idx = buf->b_ml.ml_stack_top - 1; stack_idx >= 0; --stack_idx) | |
2917 { | |
2918 buf->b_ml.ml_stack_top = 0; /* stack is invalid when failing */ | |
2919 ip = &(buf->b_ml.ml_stack[stack_idx]); | |
2920 idx = ip->ip_index; | |
2921 if ((hp = mf_get(mfp, ip->ip_bnum, 1)) == NULL) | |
2922 return FAIL; | |
2923 pp = (PTR_BL *)(hp->bh_data); /* must be pointer block */ | |
2924 if (pp->pb_id != PTR_ID) | |
2925 { | |
2926 EMSG(_("E317: pointer block id wrong 4")); | |
2927 mf_put(mfp, hp, FALSE, FALSE); | |
2928 return FAIL; | |
2929 } | |
2930 count = --(pp->pb_count); | |
2931 if (count == 0) /* the pointer block becomes empty! */ | |
2932 mf_free(mfp, hp); | |
2933 else | |
2934 { | |
2935 if (count != idx) /* move entries after the deleted one */ | |
2936 mch_memmove(&pp->pb_pointer[idx], &pp->pb_pointer[idx + 1], | |
2937 (size_t)(count - idx) * sizeof(PTR_EN)); | |
2938 mf_put(mfp, hp, TRUE, FALSE); | |
2939 | |
2940 buf->b_ml.ml_stack_top = stack_idx; /* truncate stack */ | |
1167 | 2941 /* fix line count for rest of blocks in the stack */ |
2942 if (buf->b_ml.ml_locked_lineadd != 0) | |
7 | 2943 { |
2944 ml_lineadd(buf, buf->b_ml.ml_locked_lineadd); | |
2945 buf->b_ml.ml_stack[buf->b_ml.ml_stack_top].ip_high += | |
1167 | 2946 buf->b_ml.ml_locked_lineadd; |
7 | 2947 } |
2948 ++(buf->b_ml.ml_stack_top); | |
2949 | |
2950 break; | |
2951 } | |
2952 } | |
2953 CHECK(stack_idx < 0, _("deleted block 1?")); | |
2954 } | |
2955 else | |
2956 { | |
2957 /* | |
2958 * delete the text by moving the next lines forwards | |
2959 */ | |
2960 text_start = dp->db_txt_start; | |
2961 mch_memmove((char *)dp + text_start + line_size, | |
2962 (char *)dp + text_start, (size_t)(line_start - text_start)); | |
2963 | |
2964 /* | |
2965 * delete the index by moving the next indexes backwards | |
2966 * Adjust the indexes for the text movement. | |
2967 */ | |
2968 for (i = idx; i < count - 1; ++i) | |
2969 dp->db_index[i] = dp->db_index[i + 1] + line_size; | |
2970 | |
2971 dp->db_free += line_size + INDEX_SIZE; | |
2972 dp->db_txt_start += line_size; | |
2973 --(dp->db_line_count); | |
2974 | |
2975 /* | |
2976 * mark the block dirty and make sure it is in the file (for recovery) | |
2977 */ | |
2978 buf->b_ml.ml_flags |= (ML_LOCKED_DIRTY | ML_LOCKED_POS); | |
2979 } | |
2980 | |
2981 #ifdef FEAT_BYTEOFF | |
2982 ml_updatechunk(buf, lnum, line_size, ML_CHNK_DELLINE); | |
2983 #endif | |
2984 return OK; | |
2985 } | |
2986 | |
2987 /* | |
2988 * set the B_MARKED flag for line 'lnum' | |
2989 */ | |
2990 void | |
2991 ml_setmarked(lnum) | |
2992 linenr_T lnum; | |
2993 { | |
2994 bhdr_T *hp; | |
2995 DATA_BL *dp; | |
2996 /* invalid line number */ | |
2997 if (lnum < 1 || lnum > curbuf->b_ml.ml_line_count | |
2998 || curbuf->b_ml.ml_mfp == NULL) | |
2999 return; /* give error message? */ | |
3000 | |
3001 if (lowest_marked == 0 || lowest_marked > lnum) | |
3002 lowest_marked = lnum; | |
3003 | |
3004 /* | |
3005 * find the data block containing the line | |
3006 * This also fills the stack with the blocks from the root to the data block | |
3007 * This also releases any locked block. | |
3008 */ | |
3009 if ((hp = ml_find_line(curbuf, lnum, ML_FIND)) == NULL) | |
3010 return; /* give error message? */ | |
3011 | |
3012 dp = (DATA_BL *)(hp->bh_data); | |
3013 dp->db_index[lnum - curbuf->b_ml.ml_locked_low] |= DB_MARKED; | |
3014 curbuf->b_ml.ml_flags |= ML_LOCKED_DIRTY; | |
3015 } | |
3016 | |
3017 /* | |
3018 * find the first line with its B_MARKED flag set | |
3019 */ | |
3020 linenr_T | |
3021 ml_firstmarked() | |
3022 { | |
3023 bhdr_T *hp; | |
3024 DATA_BL *dp; | |
3025 linenr_T lnum; | |
3026 int i; | |
3027 | |
3028 if (curbuf->b_ml.ml_mfp == NULL) | |
3029 return (linenr_T) 0; | |
3030 | |
3031 /* | |
3032 * The search starts with lowest_marked line. This is the last line where | |
3033 * a mark was found, adjusted by inserting/deleting lines. | |
3034 */ | |
3035 for (lnum = lowest_marked; lnum <= curbuf->b_ml.ml_line_count; ) | |
3036 { | |
3037 /* | |
3038 * Find the data block containing the line. | |
3039 * This also fills the stack with the blocks from the root to the data | |
3040 * block This also releases any locked block. | |
3041 */ | |
3042 if ((hp = ml_find_line(curbuf, lnum, ML_FIND)) == NULL) | |
3043 return (linenr_T)0; /* give error message? */ | |
3044 | |
3045 dp = (DATA_BL *)(hp->bh_data); | |
3046 | |
3047 for (i = lnum - curbuf->b_ml.ml_locked_low; | |
3048 lnum <= curbuf->b_ml.ml_locked_high; ++i, ++lnum) | |
3049 if ((dp->db_index[i]) & DB_MARKED) | |
3050 { | |
3051 (dp->db_index[i]) &= DB_INDEX_MASK; | |
3052 curbuf->b_ml.ml_flags |= ML_LOCKED_DIRTY; | |
3053 lowest_marked = lnum + 1; | |
3054 return lnum; | |
3055 } | |
3056 } | |
3057 | |
3058 return (linenr_T) 0; | |
3059 } | |
3060 | |
3061 #if 0 /* not used */ | |
3062 /* | |
3063 * return TRUE if line 'lnum' has a mark | |
3064 */ | |
3065 int | |
3066 ml_has_mark(lnum) | |
3067 linenr_T lnum; | |
3068 { | |
3069 bhdr_T *hp; | |
3070 DATA_BL *dp; | |
3071 | |
3072 if (curbuf->b_ml.ml_mfp == NULL | |
3073 || (hp = ml_find_line(curbuf, lnum, ML_FIND)) == NULL) | |
3074 return FALSE; | |
3075 | |
3076 dp = (DATA_BL *)(hp->bh_data); | |
3077 return (int)((dp->db_index[lnum - curbuf->b_ml.ml_locked_low]) & DB_MARKED); | |
3078 } | |
3079 #endif | |
3080 | |
3081 /* | |
3082 * clear all DB_MARKED flags | |
3083 */ | |
3084 void | |
3085 ml_clearmarked() | |
3086 { | |
3087 bhdr_T *hp; | |
3088 DATA_BL *dp; | |
3089 linenr_T lnum; | |
3090 int i; | |
3091 | |
3092 if (curbuf->b_ml.ml_mfp == NULL) /* nothing to do */ | |
3093 return; | |
3094 | |
3095 /* | |
3096 * The search starts with line lowest_marked. | |
3097 */ | |
3098 for (lnum = lowest_marked; lnum <= curbuf->b_ml.ml_line_count; ) | |
3099 { | |
3100 /* | |
3101 * Find the data block containing the line. | |
3102 * This also fills the stack with the blocks from the root to the data | |
3103 * block and releases any locked block. | |
3104 */ | |
3105 if ((hp = ml_find_line(curbuf, lnum, ML_FIND)) == NULL) | |
3106 return; /* give error message? */ | |
3107 | |
3108 dp = (DATA_BL *)(hp->bh_data); | |
3109 | |
3110 for (i = lnum - curbuf->b_ml.ml_locked_low; | |
3111 lnum <= curbuf->b_ml.ml_locked_high; ++i, ++lnum) | |
3112 if ((dp->db_index[i]) & DB_MARKED) | |
3113 { | |
3114 (dp->db_index[i]) &= DB_INDEX_MASK; | |
3115 curbuf->b_ml.ml_flags |= ML_LOCKED_DIRTY; | |
3116 } | |
3117 } | |
3118 | |
3119 lowest_marked = 0; | |
3120 return; | |
3121 } | |
3122 | |
3123 /* | |
3124 * flush ml_line if necessary | |
3125 */ | |
3126 static void | |
3127 ml_flush_line(buf) | |
3128 buf_T *buf; | |
3129 { | |
3130 bhdr_T *hp; | |
3131 DATA_BL *dp; | |
3132 linenr_T lnum; | |
3133 char_u *new_line; | |
3134 char_u *old_line; | |
3135 colnr_T new_len; | |
3136 int old_len; | |
3137 int extra; | |
3138 int idx; | |
3139 int start; | |
3140 int count; | |
3141 int i; | |
2075
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diff
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|
3142 static int entered = FALSE; |
7 | 3143 |
3144 if (buf->b_ml.ml_line_lnum == 0 || buf->b_ml.ml_mfp == NULL) | |
3145 return; /* nothing to do */ | |
3146 | |
3147 if (buf->b_ml.ml_flags & ML_LINE_DIRTY) | |
3148 { | |
2075
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diff
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|
3149 /* This code doesn't work recursively, but Netbeans may call back here |
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diff
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|
3150 * when obtaining the cursor position. */ |
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diff
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|
3151 if (entered) |
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diff
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|
3152 return; |
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diff
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|
3153 entered = TRUE; |
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diff
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|
3154 |
7 | 3155 lnum = buf->b_ml.ml_line_lnum; |
3156 new_line = buf->b_ml.ml_line_ptr; | |
3157 | |
3158 hp = ml_find_line(buf, lnum, ML_FIND); | |
3159 if (hp == NULL) | |
3160 EMSGN(_("E320: Cannot find line %ld"), lnum); | |
3161 else | |
3162 { | |
3163 dp = (DATA_BL *)(hp->bh_data); | |
3164 idx = lnum - buf->b_ml.ml_locked_low; | |
3165 start = ((dp->db_index[idx]) & DB_INDEX_MASK); | |
3166 old_line = (char_u *)dp + start; | |
3167 if (idx == 0) /* line is last in block */ | |
3168 old_len = dp->db_txt_end - start; | |
3169 else /* text of previous line follows */ | |
3170 old_len = (dp->db_index[idx - 1] & DB_INDEX_MASK) - start; | |
3171 new_len = (colnr_T)STRLEN(new_line) + 1; | |
3172 extra = new_len - old_len; /* negative if lines gets smaller */ | |
3173 | |
3174 /* | |
3175 * if new line fits in data block, replace directly | |
3176 */ | |
3177 if ((int)dp->db_free >= extra) | |
3178 { | |
3179 /* if the length changes and there are following lines */ | |
3180 count = buf->b_ml.ml_locked_high - buf->b_ml.ml_locked_low + 1; | |
3181 if (extra != 0 && idx < count - 1) | |
3182 { | |
3183 /* move text of following lines */ | |
3184 mch_memmove((char *)dp + dp->db_txt_start - extra, | |
3185 (char *)dp + dp->db_txt_start, | |
3186 (size_t)(start - dp->db_txt_start)); | |
3187 | |
3188 /* adjust pointers of this and following lines */ | |
3189 for (i = idx + 1; i < count; ++i) | |
3190 dp->db_index[i] -= extra; | |
3191 } | |
3192 dp->db_index[idx] -= extra; | |
3193 | |
3194 /* adjust free space */ | |
3195 dp->db_free -= extra; | |
3196 dp->db_txt_start -= extra; | |
3197 | |
3198 /* copy new line into the data block */ | |
3199 mch_memmove(old_line - extra, new_line, (size_t)new_len); | |
3200 buf->b_ml.ml_flags |= (ML_LOCKED_DIRTY | ML_LOCKED_POS); | |
3201 #ifdef FEAT_BYTEOFF | |
3202 /* The else case is already covered by the insert and delete */ | |
3203 ml_updatechunk(buf, lnum, (long)extra, ML_CHNK_UPDLINE); | |
3204 #endif | |
3205 } | |
3206 else | |
3207 { | |
3208 /* | |
3209 * Cannot do it in one data block: Delete and append. | |
3210 * Append first, because ml_delete_int() cannot delete the | |
3211 * last line in a buffer, which causes trouble for a buffer | |
3212 * that has only one line. | |
3213 * Don't forget to copy the mark! | |
3214 */ | |
3215 /* How about handling errors??? */ | |
3216 (void)ml_append_int(buf, lnum, new_line, new_len, FALSE, | |
3217 (dp->db_index[idx] & DB_MARKED)); | |
3218 (void)ml_delete_int(buf, lnum, FALSE); | |
3219 } | |
3220 } | |
3221 vim_free(new_line); | |
2075
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|
3222 |
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2003
diff
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|
3223 entered = FALSE; |
7 | 3224 } |
3225 | |
3226 buf->b_ml.ml_line_lnum = 0; | |
3227 } | |
3228 | |
3229 /* | |
3230 * create a new, empty, data block | |
3231 */ | |
3232 static bhdr_T * | |
3233 ml_new_data(mfp, negative, page_count) | |
3234 memfile_T *mfp; | |
3235 int negative; | |
3236 int page_count; | |
3237 { | |
3238 bhdr_T *hp; | |
3239 DATA_BL *dp; | |
3240 | |
3241 if ((hp = mf_new(mfp, negative, page_count)) == NULL) | |
3242 return NULL; | |
3243 | |
3244 dp = (DATA_BL *)(hp->bh_data); | |
3245 dp->db_id = DATA_ID; | |
3246 dp->db_txt_start = dp->db_txt_end = page_count * mfp->mf_page_size; | |
3247 dp->db_free = dp->db_txt_start - HEADER_SIZE; | |
3248 dp->db_line_count = 0; | |
3249 | |
3250 return hp; | |
3251 } | |
3252 | |
3253 /* | |
3254 * create a new, empty, pointer block | |
3255 */ | |
3256 static bhdr_T * | |
3257 ml_new_ptr(mfp) | |
3258 memfile_T *mfp; | |
3259 { | |
3260 bhdr_T *hp; | |
3261 PTR_BL *pp; | |
3262 | |
3263 if ((hp = mf_new(mfp, FALSE, 1)) == NULL) | |
3264 return NULL; | |
3265 | |
3266 pp = (PTR_BL *)(hp->bh_data); | |
3267 pp->pb_id = PTR_ID; | |
3268 pp->pb_count = 0; | |
3269 pp->pb_count_max = (short_u)((mfp->mf_page_size - sizeof(PTR_BL)) / sizeof(PTR_EN) + 1); | |
3270 | |
3271 return hp; | |
3272 } | |
3273 | |
3274 /* | |
3275 * lookup line 'lnum' in a memline | |
3276 * | |
3277 * action: if ML_DELETE or ML_INSERT the line count is updated while searching | |
3278 * if ML_FLUSH only flush a locked block | |
3279 * if ML_FIND just find the line | |
3280 * | |
3281 * If the block was found it is locked and put in ml_locked. | |
3282 * The stack is updated to lead to the locked block. The ip_high field in | |
3283 * the stack is updated to reflect the last line in the block AFTER the | |
3284 * insert or delete, also if the pointer block has not been updated yet. But | |
1167 | 3285 * if ml_locked != NULL ml_locked_lineadd must be added to ip_high. |
7 | 3286 * |
3287 * return: NULL for failure, pointer to block header otherwise | |
3288 */ | |
3289 static bhdr_T * | |
3290 ml_find_line(buf, lnum, action) | |
3291 buf_T *buf; | |
3292 linenr_T lnum; | |
3293 int action; | |
3294 { | |
3295 DATA_BL *dp; | |
3296 PTR_BL *pp; | |
3297 infoptr_T *ip; | |
3298 bhdr_T *hp; | |
3299 memfile_T *mfp; | |
3300 linenr_T t; | |
3301 blocknr_T bnum, bnum2; | |
3302 int dirty; | |
3303 linenr_T low, high; | |
3304 int top; | |
3305 int page_count; | |
3306 int idx; | |
3307 | |
3308 mfp = buf->b_ml.ml_mfp; | |
3309 | |
3310 /* | |
3311 * If there is a locked block check if the wanted line is in it. | |
3312 * If not, flush and release the locked block. | |
3313 * Don't do this for ML_INSERT_SAME, because the stack need to be updated. | |
3314 * Don't do this for ML_FLUSH, because we want to flush the locked block. | |
1066 | 3315 * Don't do this when 'swapfile' is reset, we want to load all the blocks. |
7 | 3316 */ |
3317 if (buf->b_ml.ml_locked) | |
3318 { | |
1066 | 3319 if (ML_SIMPLE(action) |
3320 && buf->b_ml.ml_locked_low <= lnum | |
3321 && buf->b_ml.ml_locked_high >= lnum | |
3322 && !mf_dont_release) | |
7 | 3323 { |
1066 | 3324 /* remember to update pointer blocks and stack later */ |
7 | 3325 if (action == ML_INSERT) |
3326 { | |
3327 ++(buf->b_ml.ml_locked_lineadd); | |
3328 ++(buf->b_ml.ml_locked_high); | |
3329 } | |
3330 else if (action == ML_DELETE) | |
3331 { | |
3332 --(buf->b_ml.ml_locked_lineadd); | |
3333 --(buf->b_ml.ml_locked_high); | |
3334 } | |
3335 return (buf->b_ml.ml_locked); | |
3336 } | |
3337 | |
3338 mf_put(mfp, buf->b_ml.ml_locked, buf->b_ml.ml_flags & ML_LOCKED_DIRTY, | |
3339 buf->b_ml.ml_flags & ML_LOCKED_POS); | |
3340 buf->b_ml.ml_locked = NULL; | |
3341 | |
1167 | 3342 /* |
3343 * If lines have been added or deleted in the locked block, need to | |
3344 * update the line count in pointer blocks. | |
3345 */ | |
3346 if (buf->b_ml.ml_locked_lineadd != 0) | |
7 | 3347 ml_lineadd(buf, buf->b_ml.ml_locked_lineadd); |
3348 } | |
3349 | |
3350 if (action == ML_FLUSH) /* nothing else to do */ | |
3351 return NULL; | |
3352 | |
3353 bnum = 1; /* start at the root of the tree */ | |
3354 page_count = 1; | |
3355 low = 1; | |
3356 high = buf->b_ml.ml_line_count; | |
3357 | |
3358 if (action == ML_FIND) /* first try stack entries */ | |
3359 { | |
3360 for (top = buf->b_ml.ml_stack_top - 1; top >= 0; --top) | |
3361 { | |
3362 ip = &(buf->b_ml.ml_stack[top]); | |
3363 if (ip->ip_low <= lnum && ip->ip_high >= lnum) | |
3364 { | |
3365 bnum = ip->ip_bnum; | |
3366 low = ip->ip_low; | |
3367 high = ip->ip_high; | |
3368 buf->b_ml.ml_stack_top = top; /* truncate stack at prev entry */ | |
3369 break; | |
3370 } | |
3371 } | |
3372 if (top < 0) | |
3373 buf->b_ml.ml_stack_top = 0; /* not found, start at the root */ | |
3374 } | |
3375 else /* ML_DELETE or ML_INSERT */ | |
3376 buf->b_ml.ml_stack_top = 0; /* start at the root */ | |
3377 | |
3378 /* | |
3379 * search downwards in the tree until a data block is found | |
3380 */ | |
3381 for (;;) | |
3382 { | |
3383 if ((hp = mf_get(mfp, bnum, page_count)) == NULL) | |
3384 goto error_noblock; | |
3385 | |
3386 /* | |
3387 * update high for insert/delete | |
3388 */ | |
3389 if (action == ML_INSERT) | |
3390 ++high; | |
3391 else if (action == ML_DELETE) | |
3392 --high; | |
3393 | |
3394 dp = (DATA_BL *)(hp->bh_data); | |
3395 if (dp->db_id == DATA_ID) /* data block */ | |
3396 { | |
3397 buf->b_ml.ml_locked = hp; | |
3398 buf->b_ml.ml_locked_low = low; | |
3399 buf->b_ml.ml_locked_high = high; | |
3400 buf->b_ml.ml_locked_lineadd = 0; | |
3401 buf->b_ml.ml_flags &= ~(ML_LOCKED_DIRTY | ML_LOCKED_POS); | |
3402 return hp; | |
3403 } | |
3404 | |
3405 pp = (PTR_BL *)(dp); /* must be pointer block */ | |
3406 if (pp->pb_id != PTR_ID) | |
3407 { | |
3408 EMSG(_("E317: pointer block id wrong")); | |
3409 goto error_block; | |
3410 } | |
3411 | |
3412 if ((top = ml_add_stack(buf)) < 0) /* add new entry to stack */ | |
3413 goto error_block; | |
3414 ip = &(buf->b_ml.ml_stack[top]); | |
3415 ip->ip_bnum = bnum; | |
3416 ip->ip_low = low; | |
3417 ip->ip_high = high; | |
3418 ip->ip_index = -1; /* index not known yet */ | |
3419 | |
3420 dirty = FALSE; | |
3421 for (idx = 0; idx < (int)pp->pb_count; ++idx) | |
3422 { | |
3423 t = pp->pb_pointer[idx].pe_line_count; | |
3424 CHECK(t == 0, _("pe_line_count is zero")); | |
3425 if ((low += t) > lnum) | |
3426 { | |
3427 ip->ip_index = idx; | |
3428 bnum = pp->pb_pointer[idx].pe_bnum; | |
3429 page_count = pp->pb_pointer[idx].pe_page_count; | |
3430 high = low - 1; | |
3431 low -= t; | |
3432 | |
3433 /* | |
3434 * a negative block number may have been changed | |
3435 */ | |
3436 if (bnum < 0) | |
3437 { | |
3438 bnum2 = mf_trans_del(mfp, bnum); | |
3439 if (bnum != bnum2) | |
3440 { | |
3441 bnum = bnum2; | |
3442 pp->pb_pointer[idx].pe_bnum = bnum; | |
3443 dirty = TRUE; | |
3444 } | |
3445 } | |
3446 | |
3447 break; | |
3448 } | |
3449 } | |
3450 if (idx >= (int)pp->pb_count) /* past the end: something wrong! */ | |
3451 { | |
3452 if (lnum > buf->b_ml.ml_line_count) | |
3453 EMSGN(_("E322: line number out of range: %ld past the end"), | |
3454 lnum - buf->b_ml.ml_line_count); | |
3455 | |
3456 else | |
3457 EMSGN(_("E323: line count wrong in block %ld"), bnum); | |
3458 goto error_block; | |
3459 } | |
3460 if (action == ML_DELETE) | |
3461 { | |
3462 pp->pb_pointer[idx].pe_line_count--; | |
3463 dirty = TRUE; | |
3464 } | |
3465 else if (action == ML_INSERT) | |
3466 { | |
3467 pp->pb_pointer[idx].pe_line_count++; | |
3468 dirty = TRUE; | |
3469 } | |
3470 mf_put(mfp, hp, dirty, FALSE); | |
3471 } | |
3472 | |
3473 error_block: | |
3474 mf_put(mfp, hp, FALSE, FALSE); | |
3475 error_noblock: | |
3476 /* | |
3477 * If action is ML_DELETE or ML_INSERT we have to correct the tree for | |
3478 * the incremented/decremented line counts, because there won't be a line | |
3479 * inserted/deleted after all. | |
3480 */ | |
3481 if (action == ML_DELETE) | |
3482 ml_lineadd(buf, 1); | |
3483 else if (action == ML_INSERT) | |
3484 ml_lineadd(buf, -1); | |
3485 buf->b_ml.ml_stack_top = 0; | |
3486 return NULL; | |
3487 } | |
3488 | |
3489 /* | |
3490 * add an entry to the info pointer stack | |
3491 * | |
3492 * return -1 for failure, number of the new entry otherwise | |
3493 */ | |
3494 static int | |
3495 ml_add_stack(buf) | |
3496 buf_T *buf; | |
3497 { | |
3498 int top; | |
3499 infoptr_T *newstack; | |
3500 | |
3501 top = buf->b_ml.ml_stack_top; | |
3502 | |
3503 /* may have to increase the stack size */ | |
3504 if (top == buf->b_ml.ml_stack_size) | |
3505 { | |
3506 CHECK(top > 0, _("Stack size increases")); /* more than 5 levels??? */ | |
3507 | |
3508 newstack = (infoptr_T *)alloc((unsigned)sizeof(infoptr_T) * | |
3509 (buf->b_ml.ml_stack_size + STACK_INCR)); | |
3510 if (newstack == NULL) | |
3511 return -1; | |
1624 | 3512 mch_memmove(newstack, buf->b_ml.ml_stack, |
3513 (size_t)top * sizeof(infoptr_T)); | |
7 | 3514 vim_free(buf->b_ml.ml_stack); |
3515 buf->b_ml.ml_stack = newstack; | |
3516 buf->b_ml.ml_stack_size += STACK_INCR; | |
3517 } | |
3518 | |
3519 buf->b_ml.ml_stack_top++; | |
3520 return top; | |
3521 } | |
3522 | |
3523 /* | |
3524 * Update the pointer blocks on the stack for inserted/deleted lines. | |
3525 * The stack itself is also updated. | |
3526 * | |
3527 * When a insert/delete line action fails, the line is not inserted/deleted, | |
3528 * but the pointer blocks have already been updated. That is fixed here by | |
3529 * walking through the stack. | |
3530 * | |
3531 * Count is the number of lines added, negative if lines have been deleted. | |
3532 */ | |
3533 static void | |
3534 ml_lineadd(buf, count) | |
3535 buf_T *buf; | |
3536 int count; | |
3537 { | |
3538 int idx; | |
3539 infoptr_T *ip; | |
3540 PTR_BL *pp; | |
3541 memfile_T *mfp = buf->b_ml.ml_mfp; | |
3542 bhdr_T *hp; | |
3543 | |
3544 for (idx = buf->b_ml.ml_stack_top - 1; idx >= 0; --idx) | |
3545 { | |
3546 ip = &(buf->b_ml.ml_stack[idx]); | |
3547 if ((hp = mf_get(mfp, ip->ip_bnum, 1)) == NULL) | |
3548 break; | |
3549 pp = (PTR_BL *)(hp->bh_data); /* must be pointer block */ | |
3550 if (pp->pb_id != PTR_ID) | |
3551 { | |
3552 mf_put(mfp, hp, FALSE, FALSE); | |
3553 EMSG(_("E317: pointer block id wrong 2")); | |
3554 break; | |
3555 } | |
3556 pp->pb_pointer[ip->ip_index].pe_line_count += count; | |
3557 ip->ip_high += count; | |
3558 mf_put(mfp, hp, TRUE, FALSE); | |
3559 } | |
3560 } | |
3561 | |
594 | 3562 #ifdef HAVE_READLINK |
3563 /* | |
3564 * Resolve a symlink in the last component of a file name. | |
3565 * Note that f_resolve() does it for every part of the path, we don't do that | |
3566 * here. | |
3567 * If it worked returns OK and the resolved link in "buf[MAXPATHL]". | |
3568 * Otherwise returns FAIL. | |
3569 */ | |
3570 static int | |
3571 resolve_symlink(fname, buf) | |
3572 char_u *fname; | |
3573 char_u *buf; | |
3574 { | |
3575 char_u tmp[MAXPATHL]; | |
3576 int ret; | |
3577 int depth = 0; | |
3578 | |
3579 if (fname == NULL) | |
3580 return FAIL; | |
3581 | |
3582 /* Put the result so far in tmp[], starting with the original name. */ | |
3583 vim_strncpy(tmp, fname, MAXPATHL - 1); | |
3584 | |
3585 for (;;) | |
3586 { | |
3587 /* Limit symlink depth to 100, catch recursive loops. */ | |
3588 if (++depth == 100) | |
3589 { | |
3590 EMSG2(_("E773: Symlink loop for \"%s\""), fname); | |
3591 return FAIL; | |
3592 } | |
3593 | |
3594 ret = readlink((char *)tmp, (char *)buf, MAXPATHL - 1); | |
3595 if (ret <= 0) | |
3596 { | |
619 | 3597 if (errno == EINVAL || errno == ENOENT) |
594 | 3598 { |
619 | 3599 /* Found non-symlink or not existing file, stop here. |
1855 | 3600 * When at the first level use the unmodified name, skip the |
594 | 3601 * call to vim_FullName(). */ |
3602 if (depth == 1) | |
3603 return FAIL; | |
3604 | |
3605 /* Use the resolved name in tmp[]. */ | |
3606 break; | |
3607 } | |
3608 | |
3609 /* There must be some error reading links, use original name. */ | |
3610 return FAIL; | |
3611 } | |
3612 buf[ret] = NUL; | |
3613 | |
3614 /* | |
3615 * Check whether the symlink is relative or absolute. | |
3616 * If it's relative, build a new path based on the directory | |
3617 * portion of the filename (if any) and the path the symlink | |
3618 * points to. | |
3619 */ | |
3620 if (mch_isFullName(buf)) | |
3621 STRCPY(tmp, buf); | |
3622 else | |
3623 { | |
3624 char_u *tail; | |
3625 | |
3626 tail = gettail(tmp); | |
3627 if (STRLEN(tail) + STRLEN(buf) >= MAXPATHL) | |
3628 return FAIL; | |
3629 STRCPY(tail, buf); | |
3630 } | |
3631 } | |
3632 | |
3633 /* | |
3634 * Try to resolve the full name of the file so that the swapfile name will | |
3635 * be consistent even when opening a relative symlink from different | |
3636 * working directories. | |
3637 */ | |
3638 return vim_FullName(tmp, buf, MAXPATHL, TRUE); | |
3639 } | |
3640 #endif | |
3641 | |
7 | 3642 /* |
460 | 3643 * Make swap file name out of the file name and a directory name. |
3644 * Returns pointer to allocated memory or NULL. | |
7 | 3645 */ |
460 | 3646 char_u * |
3647 makeswapname(fname, ffname, buf, dir_name) | |
3648 char_u *fname; | |
1978 | 3649 char_u *ffname UNUSED; |
7 | 3650 buf_T *buf; |
3651 char_u *dir_name; | |
3652 { | |
3653 char_u *r, *s; | |
2145
de0e7ca61893
updated for version 7.2.427
Bram Moolenaar <bram@zimbu.org>
parents:
2108
diff
changeset
|
3654 char_u *fname_res = fname; |
594 | 3655 #ifdef HAVE_READLINK |
3656 char_u fname_buf[MAXPATHL]; | |
3657 #endif | |
7 | 3658 |
3659 #if defined(UNIX) || defined(WIN3264) /* Need _very_ long file names */ | |
3660 s = dir_name + STRLEN(dir_name); | |
39 | 3661 if (after_pathsep(dir_name, s) && s[-1] == s[-2]) |
7 | 3662 { /* Ends with '//', Use Full path */ |
3663 r = NULL; | |
460 | 3664 if ((s = make_percent_swname(dir_name, fname)) != NULL) |
7 | 3665 { |
3666 r = modname(s, (char_u *)".swp", FALSE); | |
3667 vim_free(s); | |
3668 } | |
3669 return r; | |
3670 } | |
3671 #endif | |
3672 | |
594 | 3673 #ifdef HAVE_READLINK |
3674 /* Expand symlink in the file name, so that we put the swap file with the | |
3675 * actual file instead of with the symlink. */ | |
3676 if (resolve_symlink(fname, fname_buf) == OK) | |
3677 fname_res = fname_buf; | |
3678 #endif | |
3679 | |
7 | 3680 r = buf_modname( |
3681 #ifdef SHORT_FNAME | |
3682 TRUE, | |
3683 #else | |
3684 (buf->b_p_sn || buf->b_shortname), | |
3685 #endif | |
1082 | 3686 #ifdef RISCOS |
3687 /* Avoid problems if fname has special chars, eg <Wimp$Scrap> */ | |
460 | 3688 ffname, |
7 | 3689 #else |
594 | 3690 fname_res, |
7 | 3691 #endif |
3692 (char_u *) | |
3693 #if defined(VMS) || defined(RISCOS) | |
3694 "_swp", | |
3695 #else | |
3696 ".swp", | |
3697 #endif | |
3698 #ifdef SHORT_FNAME /* always 8.3 file name */ | |
3699 FALSE | |
3700 #else | |
3701 /* Prepend a '.' to the swap file name for the current directory. */ | |
3702 dir_name[0] == '.' && dir_name[1] == NUL | |
3703 #endif | |
3704 ); | |
3705 if (r == NULL) /* out of memory */ | |
3706 return NULL; | |
3707 | |
3708 s = get_file_in_dir(r, dir_name); | |
3709 vim_free(r); | |
3710 return s; | |
3711 } | |
3712 | |
3713 /* | |
3714 * Get file name to use for swap file or backup file. | |
3715 * Use the name of the edited file "fname" and an entry in the 'dir' or 'bdir' | |
3716 * option "dname". | |
3717 * - If "dname" is ".", return "fname" (swap file in dir of file). | |
3718 * - If "dname" starts with "./", insert "dname" in "fname" (swap file | |
3719 * relative to dir of file). | |
3720 * - Otherwise, prepend "dname" to the tail of "fname" (swap file in specific | |
3721 * dir). | |
3722 * | |
3723 * The return value is an allocated string and can be NULL. | |
3724 */ | |
3725 char_u * | |
3726 get_file_in_dir(fname, dname) | |
3727 char_u *fname; | |
3728 char_u *dname; /* don't use "dirname", it is a global for Alpha */ | |
3729 { | |
3730 char_u *t; | |
3731 char_u *tail; | |
3732 char_u *retval; | |
3733 int save_char; | |
3734 | |
3735 tail = gettail(fname); | |
3736 | |
3737 if (dname[0] == '.' && dname[1] == NUL) | |
3738 retval = vim_strsave(fname); | |
3739 else if (dname[0] == '.' && vim_ispathsep(dname[1])) | |
3740 { | |
3741 if (tail == fname) /* no path before file name */ | |
3742 retval = concat_fnames(dname + 2, tail, TRUE); | |
3743 else | |
3744 { | |
3745 save_char = *tail; | |
3746 *tail = NUL; | |
3747 t = concat_fnames(fname, dname + 2, TRUE); | |
3748 *tail = save_char; | |
3749 if (t == NULL) /* out of memory */ | |
3750 retval = NULL; | |
3751 else | |
3752 { | |
3753 retval = concat_fnames(t, tail, TRUE); | |
3754 vim_free(t); | |
3755 } | |
3756 } | |
3757 } | |
3758 else | |
3759 retval = concat_fnames(dname, tail, TRUE); | |
3760 | |
3761 return retval; | |
3762 } | |
3763 | |
580 | 3764 static void attention_message __ARGS((buf_T *buf, char_u *fname)); |
3765 | |
3766 /* | |
3767 * Print the ATTENTION message: info about an existing swap file. | |
3768 */ | |
3769 static void | |
3770 attention_message(buf, fname) | |
3771 buf_T *buf; /* buffer being edited */ | |
3772 char_u *fname; /* swap file name */ | |
3773 { | |
3774 struct stat st; | |
3775 time_t x, sx; | |
1001 | 3776 char *p; |
580 | 3777 |
3778 ++no_wait_return; | |
3779 (void)EMSG(_("E325: ATTENTION")); | |
3780 MSG_PUTS(_("\nFound a swap file by the name \"")); | |
3781 msg_home_replace(fname); | |
3782 MSG_PUTS("\"\n"); | |
3783 sx = swapfile_info(fname); | |
3784 MSG_PUTS(_("While opening file \"")); | |
3785 msg_outtrans(buf->b_fname); | |
3786 MSG_PUTS("\"\n"); | |
3787 if (mch_stat((char *)buf->b_fname, &st) != -1) | |
3788 { | |
3789 MSG_PUTS(_(" dated: ")); | |
3790 x = st.st_mtime; /* Manx C can't do &st.st_mtime */ | |
1001 | 3791 p = ctime(&x); /* includes '\n' */ |
3792 if (p == NULL) | |
3793 MSG_PUTS("(invalid)\n"); | |
3794 else | |
3795 MSG_PUTS(p); | |
580 | 3796 if (sx != 0 && x > sx) |
3797 MSG_PUTS(_(" NEWER than swap file!\n")); | |
3798 } | |
3799 /* Some of these messages are long to allow translation to | |
3800 * other languages. */ | |
3801 MSG_PUTS(_("\n(1) Another program may be editing the same file.\n If this is the case, be careful not to end up with two\n different instances of the same file when making changes.\n")); | |
3802 MSG_PUTS(_(" Quit, or continue with caution.\n")); | |
3803 MSG_PUTS(_("\n(2) An edit session for this file crashed.\n")); | |
3804 MSG_PUTS(_(" If this is the case, use \":recover\" or \"vim -r ")); | |
3805 msg_outtrans(buf->b_fname); | |
3806 MSG_PUTS(_("\"\n to recover the changes (see \":help recovery\").\n")); | |
3807 MSG_PUTS(_(" If you did this already, delete the swap file \"")); | |
3808 msg_outtrans(fname); | |
3809 MSG_PUTS(_("\"\n to avoid this message.\n")); | |
3810 cmdline_row = msg_row; | |
3811 --no_wait_return; | |
3812 } | |
3813 | |
3814 #ifdef FEAT_AUTOCMD | |
3815 static int do_swapexists __ARGS((buf_T *buf, char_u *fname)); | |
3816 | |
3817 /* | |
3818 * Trigger the SwapExists autocommands. | |
3819 * Returns a value for equivalent to do_dialog() (see below): | |
3820 * 0: still need to ask for a choice | |
3821 * 1: open read-only | |
3822 * 2: edit anyway | |
3823 * 3: recover | |
3824 * 4: delete it | |
3825 * 5: quit | |
3826 * 6: abort | |
3827 */ | |
3828 static int | |
3829 do_swapexists(buf, fname) | |
3830 buf_T *buf; | |
3831 char_u *fname; | |
3832 { | |
3833 set_vim_var_string(VV_SWAPNAME, fname, -1); | |
3834 set_vim_var_string(VV_SWAPCHOICE, NULL, -1); | |
3835 | |
3836 /* Trigger SwapExists autocommands with <afile> set to the file being | |
1856 | 3837 * edited. Disallow changing directory here. */ |
3838 ++allbuf_lock; | |
580 | 3839 apply_autocmds(EVENT_SWAPEXISTS, buf->b_fname, NULL, FALSE, NULL); |
1856 | 3840 --allbuf_lock; |
580 | 3841 |
3842 set_vim_var_string(VV_SWAPNAME, NULL, -1); | |
3843 | |
3844 switch (*get_vim_var_str(VV_SWAPCHOICE)) | |
3845 { | |
3846 case 'o': return 1; | |
3847 case 'e': return 2; | |
3848 case 'r': return 3; | |
3849 case 'd': return 4; | |
3850 case 'q': return 5; | |
3851 case 'a': return 6; | |
3852 } | |
3853 | |
3854 return 0; | |
3855 } | |
3856 #endif | |
3857 | |
7 | 3858 /* |
3859 * Find out what name to use for the swap file for buffer 'buf'. | |
3860 * | |
3861 * Several names are tried to find one that does not exist | |
460 | 3862 * Returns the name in allocated memory or NULL. |
7 | 3863 * |
3864 * Note: If BASENAMELEN is not correct, you will get error messages for | |
3865 * not being able to open the swapfile | |
1856 | 3866 * Note: May trigger SwapExists autocmd, pointers may change! |
7 | 3867 */ |
3868 static char_u * | |
3869 findswapname(buf, dirp, old_fname) | |
3870 buf_T *buf; | |
3871 char_u **dirp; /* pointer to list of directories */ | |
3872 char_u *old_fname; /* don't give warning for this file name */ | |
3873 { | |
3874 char_u *fname; | |
3875 int n; | |
3876 char_u *dir_name; | |
3877 #ifdef AMIGA | |
3878 BPTR fh; | |
3879 #endif | |
3880 #ifndef SHORT_FNAME | |
3881 int r; | |
3882 #endif | |
3883 | |
3884 #if !defined(SHORT_FNAME) \ | |
3885 && ((!defined(UNIX) && !defined(OS2)) || defined(ARCHIE)) | |
3886 # define CREATE_DUMMY_FILE | |
3887 FILE *dummyfd = NULL; | |
3888 | |
3889 /* | |
3890 * If we start editing a new file, e.g. "test.doc", which resides on an MSDOS | |
3891 * compatible filesystem, it is possible that the file "test.doc.swp" which we | |
3892 * create will be exactly the same file. To avoid this problem we temporarily | |
3893 * create "test.doc". | |
3894 * Don't do this when the check below for a 8.3 file name is used. | |
3895 */ | |
3896 if (!(buf->b_p_sn || buf->b_shortname) && buf->b_fname != NULL | |
3897 && mch_getperm(buf->b_fname) < 0) | |
3898 dummyfd = mch_fopen((char *)buf->b_fname, "w"); | |
3899 #endif | |
3900 | |
3901 /* | |
3902 * Isolate a directory name from *dirp and put it in dir_name. | |
3903 * First allocate some memory to put the directory name in. | |
3904 */ | |
3905 dir_name = alloc((unsigned)STRLEN(*dirp) + 1); | |
3906 if (dir_name != NULL) | |
3907 (void)copy_option_part(dirp, dir_name, 31000, ","); | |
3908 | |
3909 /* | |
3910 * we try different names until we find one that does not exist yet | |
3911 */ | |
3912 if (dir_name == NULL) /* out of memory */ | |
3913 fname = NULL; | |
3914 else | |
460 | 3915 fname = makeswapname(buf->b_fname, buf->b_ffname, buf, dir_name); |
7 | 3916 |
3917 for (;;) | |
3918 { | |
3919 if (fname == NULL) /* must be out of memory */ | |
3920 break; | |
3921 if ((n = (int)STRLEN(fname)) == 0) /* safety check */ | |
3922 { | |
3923 vim_free(fname); | |
3924 fname = NULL; | |
3925 break; | |
3926 } | |
3927 #if (defined(UNIX) || defined(OS2)) && !defined(ARCHIE) && !defined(SHORT_FNAME) | |
3928 /* | |
3929 * Some systems have a MS-DOS compatible filesystem that use 8.3 character | |
3930 * file names. If this is the first try and the swap file name does not fit in | |
3931 * 8.3, detect if this is the case, set shortname and try again. | |
3932 */ | |
3933 if (fname[n - 2] == 'w' && fname[n - 1] == 'p' | |
3934 && !(buf->b_p_sn || buf->b_shortname)) | |
3935 { | |
3936 char_u *tail; | |
3937 char_u *fname2; | |
3938 struct stat s1, s2; | |
3939 int f1, f2; | |
3940 int created1 = FALSE, created2 = FALSE; | |
3941 int same = FALSE; | |
3942 | |
3943 /* | |
3944 * Check if swapfile name does not fit in 8.3: | |
3945 * It either contains two dots, is longer than 8 chars, or starts | |
3946 * with a dot. | |
3947 */ | |
3948 tail = gettail(buf->b_fname); | |
3949 if ( vim_strchr(tail, '.') != NULL | |
3950 || STRLEN(tail) > (size_t)8 | |
3951 || *gettail(fname) == '.') | |
3952 { | |
3953 fname2 = alloc(n + 2); | |
3954 if (fname2 != NULL) | |
3955 { | |
3956 STRCPY(fname2, fname); | |
3957 /* if fname == "xx.xx.swp", fname2 = "xx.xx.swx" | |
3958 * if fname == ".xx.swp", fname2 = ".xx.swpx" | |
3959 * if fname == "123456789.swp", fname2 = "12345678x.swp" | |
3960 */ | |
3961 if (vim_strchr(tail, '.') != NULL) | |
3962 fname2[n - 1] = 'x'; | |
3963 else if (*gettail(fname) == '.') | |
3964 { | |
3965 fname2[n] = 'x'; | |
3966 fname2[n + 1] = NUL; | |
3967 } | |
3968 else | |
3969 fname2[n - 5] += 1; | |
3970 /* | |
3971 * may need to create the files to be able to use mch_stat() | |
3972 */ | |
3973 f1 = mch_open((char *)fname, O_RDONLY | O_EXTRA, 0); | |
3974 if (f1 < 0) | |
3975 { | |
3976 f1 = mch_open_rw((char *)fname, | |
3977 O_RDWR|O_CREAT|O_EXCL|O_EXTRA); | |
3978 #if defined(OS2) | |
3979 if (f1 < 0 && errno == ENOENT) | |
3980 same = TRUE; | |
3981 #endif | |
3982 created1 = TRUE; | |
3983 } | |
3984 if (f1 >= 0) | |
3985 { | |
3986 f2 = mch_open((char *)fname2, O_RDONLY | O_EXTRA, 0); | |
3987 if (f2 < 0) | |
3988 { | |
3989 f2 = mch_open_rw((char *)fname2, | |
3990 O_RDWR|O_CREAT|O_EXCL|O_EXTRA); | |
3991 created2 = TRUE; | |
3992 } | |
3993 if (f2 >= 0) | |
3994 { | |
3995 /* | |
3996 * Both files exist now. If mch_stat() returns the | |
3997 * same device and inode they are the same file. | |
3998 */ | |
3999 if (mch_fstat(f1, &s1) != -1 | |
4000 && mch_fstat(f2, &s2) != -1 | |
4001 && s1.st_dev == s2.st_dev | |
4002 && s1.st_ino == s2.st_ino) | |
4003 same = TRUE; | |
4004 close(f2); | |
4005 if (created2) | |
4006 mch_remove(fname2); | |
4007 } | |
4008 close(f1); | |
4009 if (created1) | |
4010 mch_remove(fname); | |
4011 } | |
4012 vim_free(fname2); | |
4013 if (same) | |
4014 { | |
4015 buf->b_shortname = TRUE; | |
4016 vim_free(fname); | |
460 | 4017 fname = makeswapname(buf->b_fname, buf->b_ffname, |
4018 buf, dir_name); | |
7 | 4019 continue; /* try again with b_shortname set */ |
4020 } | |
4021 } | |
4022 } | |
4023 } | |
4024 #endif | |
4025 /* | |
4026 * check if the swapfile already exists | |
4027 */ | |
4028 if (mch_getperm(fname) < 0) /* it does not exist */ | |
4029 { | |
4030 #ifdef HAVE_LSTAT | |
4031 struct stat sb; | |
4032 | |
4033 /* | |
4034 * Extra security check: When a swap file is a symbolic link, this | |
4035 * is most likely a symlink attack. | |
4036 */ | |
4037 if (mch_lstat((char *)fname, &sb) < 0) | |
4038 #else | |
4039 # ifdef AMIGA | |
4040 fh = Open((UBYTE *)fname, (long)MODE_NEWFILE); | |
4041 /* | |
4042 * on the Amiga mch_getperm() will return -1 when the file exists | |
4043 * but is being used by another program. This happens if you edit | |
4044 * a file twice. | |
4045 */ | |
4046 if (fh != (BPTR)NULL) /* can open file, OK */ | |
4047 { | |
4048 Close(fh); | |
4049 mch_remove(fname); | |
4050 break; | |
4051 } | |
4052 if (IoErr() != ERROR_OBJECT_IN_USE | |
4053 && IoErr() != ERROR_OBJECT_EXISTS) | |
4054 # endif | |
4055 #endif | |
4056 break; | |
4057 } | |
4058 | |
4059 /* | |
4060 * A file name equal to old_fname is OK to use. | |
4061 */ | |
4062 if (old_fname != NULL && fnamecmp(fname, old_fname) == 0) | |
4063 break; | |
4064 | |
4065 /* | |
4066 * get here when file already exists | |
4067 */ | |
4068 if (fname[n - 2] == 'w' && fname[n - 1] == 'p') /* first try */ | |
4069 { | |
4070 #ifndef SHORT_FNAME | |
4071 /* | |
4072 * on MS-DOS compatible filesystems (e.g. messydos) file.doc.swp | |
4073 * and file.doc are the same file. To guess if this problem is | |
4074 * present try if file.doc.swx exists. If it does, we set | |
4075 * buf->b_shortname and try file_doc.swp (dots replaced by | |
4076 * underscores for this file), and try again. If it doesn't we | |
4077 * assume that "file.doc.swp" already exists. | |
4078 */ | |
4079 if (!(buf->b_p_sn || buf->b_shortname)) /* not tried yet */ | |
4080 { | |
4081 fname[n - 1] = 'x'; | |
4082 r = mch_getperm(fname); /* try "file.swx" */ | |
4083 fname[n - 1] = 'p'; | |
4084 if (r >= 0) /* "file.swx" seems to exist */ | |
4085 { | |
4086 buf->b_shortname = TRUE; | |
4087 vim_free(fname); | |
460 | 4088 fname = makeswapname(buf->b_fname, buf->b_ffname, |
4089 buf, dir_name); | |
7 | 4090 continue; /* try again with '.' replaced with '_' */ |
4091 } | |
4092 } | |
4093 #endif | |
4094 /* | |
4095 * If we get here the ".swp" file really exists. | |
4096 * Give an error message, unless recovering, no file name, we are | |
4097 * viewing a help file or when the path of the file is different | |
4098 * (happens when all .swp files are in one directory). | |
4099 */ | |
43 | 4100 if (!recoverymode && buf->b_fname != NULL |
4101 && !buf->b_help && !(buf->b_flags & BF_DUMMY)) | |
7 | 4102 { |
4103 int fd; | |
4104 struct block0 b0; | |
4105 int differ = FALSE; | |
4106 | |
4107 /* | |
4108 * Try to read block 0 from the swap file to get the original | |
4109 * file name (and inode number). | |
4110 */ | |
4111 fd = mch_open((char *)fname, O_RDONLY | O_EXTRA, 0); | |
4112 if (fd >= 0) | |
4113 { | |
4114 if (read(fd, (char *)&b0, sizeof(b0)) == sizeof(b0)) | |
4115 { | |
4116 /* | |
39 | 4117 * If the swapfile has the same directory as the |
4118 * buffer don't compare the directory names, they can | |
4119 * have a different mountpoint. | |
7 | 4120 */ |
39 | 4121 if (b0.b0_flags & B0_SAME_DIR) |
4122 { | |
4123 if (fnamecmp(gettail(buf->b_ffname), | |
4124 gettail(b0.b0_fname)) != 0 | |
4125 || !same_directory(fname, buf->b_ffname)) | |
594 | 4126 { |
4127 #ifdef CHECK_INODE | |
4128 /* Symlinks may point to the same file even | |
4129 * when the name differs, need to check the | |
4130 * inode too. */ | |
4131 expand_env(b0.b0_fname, NameBuff, MAXPATHL); | |
4132 if (fnamecmp_ino(buf->b_ffname, NameBuff, | |
4133 char_to_long(b0.b0_ino))) | |
4134 #endif | |
4135 differ = TRUE; | |
4136 } | |
39 | 4137 } |
4138 else | |
4139 { | |
4140 /* | |
4141 * The name in the swap file may be | |
4142 * "~user/path/file". Expand it first. | |
4143 */ | |
4144 expand_env(b0.b0_fname, NameBuff, MAXPATHL); | |
7 | 4145 #ifdef CHECK_INODE |
39 | 4146 if (fnamecmp_ino(buf->b_ffname, NameBuff, |
594 | 4147 char_to_long(b0.b0_ino))) |
39 | 4148 differ = TRUE; |
7 | 4149 #else |
39 | 4150 if (fnamecmp(NameBuff, buf->b_ffname) != 0) |
4151 differ = TRUE; | |
7 | 4152 #endif |
39 | 4153 } |
7 | 4154 } |
4155 close(fd); | |
4156 } | |
4157 #ifdef RISCOS | |
4158 else | |
4159 /* Can't open swap file, though it does exist. | |
4160 * Assume that the user is editing two files with | |
4161 * the same name in different directories. No error. | |
4162 */ | |
4163 differ = TRUE; | |
4164 #endif | |
4165 | |
4166 /* give the ATTENTION message when there is an old swap file | |
4167 * for the current file, and the buffer was not recovered. */ | |
4168 if (differ == FALSE && !(curbuf->b_flags & BF_RECOVERED) | |
4169 && vim_strchr(p_shm, SHM_ATTENTION) == NULL) | |
4170 { | |
580 | 4171 #if defined(HAS_SWAP_EXISTS_ACTION) |
4172 int choice = 0; | |
4173 #endif | |
7 | 4174 #ifdef CREATE_DUMMY_FILE |
4175 int did_use_dummy = FALSE; | |
4176 | |
4177 /* Avoid getting a warning for the file being created | |
4178 * outside of Vim, it was created at the start of this | |
4179 * function. Delete the file now, because Vim might exit | |
4180 * here if the window is closed. */ | |
4181 if (dummyfd != NULL) | |
4182 { | |
4183 fclose(dummyfd); | |
4184 dummyfd = NULL; | |
4185 mch_remove(buf->b_fname); | |
4186 did_use_dummy = TRUE; | |
4187 } | |
4188 #endif | |
4189 | |
4190 #if (defined(UNIX) || defined(__EMX__) || defined(VMS)) && (defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)) | |
4191 process_still_running = FALSE; | |
4192 #endif | |
580 | 4193 #ifdef FEAT_AUTOCMD |
4194 /* | |
4195 * If there is an SwapExists autocommand and we can handle | |
4196 * the response, trigger it. It may return 0 to ask the | |
4197 * user anyway. | |
4198 */ | |
4199 if (swap_exists_action != SEA_NONE | |
4200 && has_autocmd(EVENT_SWAPEXISTS, buf->b_fname, buf)) | |
4201 choice = do_swapexists(buf, fname); | |
4202 | |
4203 if (choice == 0) | |
4204 #endif | |
7 | 4205 { |
580 | 4206 #ifdef FEAT_GUI |
4207 /* If we are supposed to start the GUI but it wasn't | |
4208 * completely started yet, start it now. This makes | |
4209 * the messages displayed in the Vim window when | |
4210 * loading a session from the .gvimrc file. */ | |
4211 if (gui.starting && !gui.in_use) | |
4212 gui_start(); | |
4213 #endif | |
4214 /* Show info about the existing swap file. */ | |
4215 attention_message(buf, fname); | |
4216 | |
4217 /* We don't want a 'q' typed at the more-prompt | |
4218 * interrupt loading a file. */ | |
4219 got_int = FALSE; | |
7 | 4220 } |
4221 | |
4222 #if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG) | |
580 | 4223 if (swap_exists_action != SEA_NONE && choice == 0) |
7 | 4224 { |
4225 char_u *name; | |
4226 | |
4227 name = alloc((unsigned)(STRLEN(fname) | |
4228 + STRLEN(_("Swap file \"")) | |
4229 + STRLEN(_("\" already exists!")) + 5)); | |
4230 if (name != NULL) | |
4231 { | |
4232 STRCPY(name, _("Swap file \"")); | |
4233 home_replace(NULL, fname, name + STRLEN(name), | |
4234 1000, TRUE); | |
4235 STRCAT(name, _("\" already exists!")); | |
4236 } | |
580 | 4237 choice = do_dialog(VIM_WARNING, |
7 | 4238 (char_u *)_("VIM - ATTENTION"), |
4239 name == NULL | |
4240 ? (char_u *)_("Swap file already exists!") | |
4241 : name, | |
4242 # if defined(UNIX) || defined(__EMX__) || defined(VMS) | |
4243 process_still_running | |
4244 ? (char_u *)_("&Open Read-Only\n&Edit anyway\n&Recover\n&Quit\n&Abort") : | |
4245 # endif | |
580 | 4246 (char_u *)_("&Open Read-Only\n&Edit anyway\n&Recover\n&Delete it\n&Quit\n&Abort"), 1, NULL); |
4247 | |
4248 # if defined(UNIX) || defined(__EMX__) || defined(VMS) | |
4249 if (process_still_running && choice >= 4) | |
4250 choice++; /* Skip missing "Delete it" button */ | |
4251 # endif | |
4252 vim_free(name); | |
4253 | |
4254 /* pretend screen didn't scroll, need redraw anyway */ | |
4255 msg_scrolled = 0; | |
4256 redraw_all_later(NOT_VALID); | |
4257 } | |
4258 #endif | |
4259 | |
4260 #if defined(HAS_SWAP_EXISTS_ACTION) | |
4261 if (choice > 0) | |
4262 { | |
4263 switch (choice) | |
7 | 4264 { |
4265 case 1: | |
4266 buf->b_p_ro = TRUE; | |
4267 break; | |
4268 case 2: | |
4269 break; | |
4270 case 3: | |
4271 swap_exists_action = SEA_RECOVER; | |
4272 break; | |
4273 case 4: | |
580 | 4274 mch_remove(fname); |
4275 break; | |
4276 case 5: | |
7 | 4277 swap_exists_action = SEA_QUIT; |
4278 break; | |
580 | 4279 case 6: |
7 | 4280 swap_exists_action = SEA_QUIT; |
4281 got_int = TRUE; | |
4282 break; | |
4283 } | |
4284 | |
4285 /* If the file was deleted this fname can be used. */ | |
4286 if (mch_getperm(fname) < 0) | |
4287 break; | |
4288 } | |
4289 else | |
4290 #endif | |
4291 { | |
4292 MSG_PUTS("\n"); | |
625 | 4293 if (msg_silent == 0) |
4294 /* call wait_return() later */ | |
4295 need_wait_return = TRUE; | |
7 | 4296 } |
4297 | |
4298 #ifdef CREATE_DUMMY_FILE | |
4299 /* Going to try another name, need the dummy file again. */ | |
4300 if (did_use_dummy) | |
4301 dummyfd = mch_fopen((char *)buf->b_fname, "w"); | |
4302 #endif | |
4303 } | |
4304 } | |
4305 } | |
4306 | |
4307 /* | |
4308 * Change the ".swp" extension to find another file that can be used. | |
4309 * First decrement the last char: ".swo", ".swn", etc. | |
4310 * If that still isn't enough decrement the last but one char: ".svz" | |
9 | 4311 * Can happen when editing many "No Name" buffers. |
7 | 4312 */ |
4313 if (fname[n - 1] == 'a') /* ".s?a" */ | |
4314 { | |
4315 if (fname[n - 2] == 'a') /* ".saa": tried enough, give up */ | |
4316 { | |
4317 EMSG(_("E326: Too many swap files found")); | |
4318 vim_free(fname); | |
4319 fname = NULL; | |
4320 break; | |
4321 } | |
4322 --fname[n - 2]; /* ".svz", ".suz", etc. */ | |
4323 fname[n - 1] = 'z' + 1; | |
4324 } | |
4325 --fname[n - 1]; /* ".swo", ".swn", etc. */ | |
4326 } | |
4327 | |
4328 vim_free(dir_name); | |
4329 #ifdef CREATE_DUMMY_FILE | |
4330 if (dummyfd != NULL) /* file has been created temporarily */ | |
4331 { | |
4332 fclose(dummyfd); | |
4333 mch_remove(buf->b_fname); | |
4334 } | |
4335 #endif | |
4336 return fname; | |
4337 } | |
4338 | |
4339 static int | |
4340 b0_magic_wrong(b0p) | |
4341 ZERO_BL *b0p; | |
4342 { | |
4343 return (b0p->b0_magic_long != (long)B0_MAGIC_LONG | |
4344 || b0p->b0_magic_int != (int)B0_MAGIC_INT | |
4345 || b0p->b0_magic_short != (short)B0_MAGIC_SHORT | |
4346 || b0p->b0_magic_char != B0_MAGIC_CHAR); | |
4347 } | |
4348 | |
4349 #ifdef CHECK_INODE | |
4350 /* | |
4351 * Compare current file name with file name from swap file. | |
4352 * Try to use inode numbers when possible. | |
4353 * Return non-zero when files are different. | |
4354 * | |
4355 * When comparing file names a few things have to be taken into consideration: | |
4356 * - When working over a network the full path of a file depends on the host. | |
4357 * We check the inode number if possible. It is not 100% reliable though, | |
4358 * because the device number cannot be used over a network. | |
4359 * - When a file does not exist yet (editing a new file) there is no inode | |
4360 * number. | |
4361 * - The file name in a swap file may not be valid on the current host. The | |
4362 * "~user" form is used whenever possible to avoid this. | |
4363 * | |
4364 * This is getting complicated, let's make a table: | |
4365 * | |
4366 * ino_c ino_s fname_c fname_s differ = | |
4367 * | |
4368 * both files exist -> compare inode numbers: | |
4369 * != 0 != 0 X X ino_c != ino_s | |
4370 * | |
4371 * inode number(s) unknown, file names available -> compare file names | |
4372 * == 0 X OK OK fname_c != fname_s | |
4373 * X == 0 OK OK fname_c != fname_s | |
4374 * | |
4375 * current file doesn't exist, file for swap file exist, file name(s) not | |
4376 * available -> probably different | |
4377 * == 0 != 0 FAIL X TRUE | |
4378 * == 0 != 0 X FAIL TRUE | |
4379 * | |
4380 * current file exists, inode for swap unknown, file name(s) not | |
4381 * available -> probably different | |
4382 * != 0 == 0 FAIL X TRUE | |
4383 * != 0 == 0 X FAIL TRUE | |
4384 * | |
4385 * current file doesn't exist, inode for swap unknown, one file name not | |
4386 * available -> probably different | |
4387 * == 0 == 0 FAIL OK TRUE | |
4388 * == 0 == 0 OK FAIL TRUE | |
4389 * | |
4390 * current file doesn't exist, inode for swap unknown, both file names not | |
4391 * available -> probably same file | |
4392 * == 0 == 0 FAIL FAIL FALSE | |
4393 * | |
4394 * Note that when the ino_t is 64 bits, only the last 32 will be used. This | |
4395 * can't be changed without making the block 0 incompatible with 32 bit | |
4396 * versions. | |
4397 */ | |
4398 | |
4399 static int | |
4400 fnamecmp_ino(fname_c, fname_s, ino_block0) | |
4401 char_u *fname_c; /* current file name */ | |
4402 char_u *fname_s; /* file name from swap file */ | |
4403 long ino_block0; | |
4404 { | |
4405 struct stat st; | |
4406 ino_t ino_c = 0; /* ino of current file */ | |
4407 ino_t ino_s; /* ino of file from swap file */ | |
4408 char_u buf_c[MAXPATHL]; /* full path of fname_c */ | |
4409 char_u buf_s[MAXPATHL]; /* full path of fname_s */ | |
4410 int retval_c; /* flag: buf_c valid */ | |
4411 int retval_s; /* flag: buf_s valid */ | |
4412 | |
4413 if (mch_stat((char *)fname_c, &st) == 0) | |
4414 ino_c = (ino_t)st.st_ino; | |
4415 | |
4416 /* | |
4417 * First we try to get the inode from the file name, because the inode in | |
4418 * the swap file may be outdated. If that fails (e.g. this path is not | |
4419 * valid on this machine), use the inode from block 0. | |
4420 */ | |
4421 if (mch_stat((char *)fname_s, &st) == 0) | |
4422 ino_s = (ino_t)st.st_ino; | |
4423 else | |
4424 ino_s = (ino_t)ino_block0; | |
4425 | |
4426 if (ino_c && ino_s) | |
4427 return (ino_c != ino_s); | |
4428 | |
4429 /* | |
4430 * One of the inode numbers is unknown, try a forced vim_FullName() and | |
4431 * compare the file names. | |
4432 */ | |
4433 retval_c = vim_FullName(fname_c, buf_c, MAXPATHL, TRUE); | |
4434 retval_s = vim_FullName(fname_s, buf_s, MAXPATHL, TRUE); | |
4435 if (retval_c == OK && retval_s == OK) | |
4436 return (STRCMP(buf_c, buf_s) != 0); | |
4437 | |
4438 /* | |
4439 * Can't compare inodes or file names, guess that the files are different, | |
4440 * unless both appear not to exist at all. | |
4441 */ | |
4442 if (ino_s == 0 && ino_c == 0 && retval_c == FAIL && retval_s == FAIL) | |
4443 return FALSE; | |
4444 return TRUE; | |
4445 } | |
4446 #endif /* CHECK_INODE */ | |
4447 | |
4448 /* | |
4449 * Move a long integer into a four byte character array. | |
4450 * Used for machine independency in block zero. | |
4451 */ | |
4452 static void | |
4453 long_to_char(n, s) | |
4454 long n; | |
4455 char_u *s; | |
4456 { | |
4457 s[0] = (char_u)(n & 0xff); | |
4458 n = (unsigned)n >> 8; | |
4459 s[1] = (char_u)(n & 0xff); | |
4460 n = (unsigned)n >> 8; | |
4461 s[2] = (char_u)(n & 0xff); | |
4462 n = (unsigned)n >> 8; | |
4463 s[3] = (char_u)(n & 0xff); | |
4464 } | |
4465 | |
4466 static long | |
4467 char_to_long(s) | |
4468 char_u *s; | |
4469 { | |
4470 long retval; | |
4471 | |
4472 retval = s[3]; | |
4473 retval <<= 8; | |
4474 retval |= s[2]; | |
4475 retval <<= 8; | |
4476 retval |= s[1]; | |
4477 retval <<= 8; | |
4478 retval |= s[0]; | |
4479 | |
4480 return retval; | |
4481 } | |
4482 | |
39 | 4483 /* |
4484 * Set the flags in the first block of the swap file: | |
4485 * - file is modified or not: buf->b_changed | |
4486 * - 'fileformat' | |
4487 * - 'fileencoding' | |
4488 */ | |
7 | 4489 void |
39 | 4490 ml_setflags(buf) |
7 | 4491 buf_T *buf; |
4492 { | |
4493 bhdr_T *hp; | |
4494 ZERO_BL *b0p; | |
4495 | |
4496 if (!buf->b_ml.ml_mfp) | |
4497 return; | |
4498 for (hp = buf->b_ml.ml_mfp->mf_used_last; hp != NULL; hp = hp->bh_prev) | |
4499 { | |
4500 if (hp->bh_bnum == 0) | |
4501 { | |
4502 b0p = (ZERO_BL *)(hp->bh_data); | |
39 | 4503 b0p->b0_dirty = buf->b_changed ? B0_DIRTY : 0; |
4504 b0p->b0_flags = (b0p->b0_flags & ~B0_FF_MASK) | |
4505 | (get_fileformat(buf) + 1); | |
4506 #ifdef FEAT_MBYTE | |
4507 add_b0_fenc(b0p, buf); | |
4508 #endif | |
7 | 4509 hp->bh_flags |= BH_DIRTY; |
4510 mf_sync(buf->b_ml.ml_mfp, MFS_ZERO); | |
4511 break; | |
4512 } | |
4513 } | |
4514 } | |
4515 | |
4516 #if defined(FEAT_BYTEOFF) || defined(PROTO) | |
4517 | |
4518 #define MLCS_MAXL 800 /* max no of lines in chunk */ | |
4519 #define MLCS_MINL 400 /* should be half of MLCS_MAXL */ | |
4520 | |
4521 /* | |
4522 * Keep information for finding byte offset of a line, updtytpe may be one of: | |
4523 * ML_CHNK_ADDLINE: Add len to parent chunk, possibly splitting it | |
4524 * Careful: ML_CHNK_ADDLINE may cause ml_find_line() to be called. | |
4525 * ML_CHNK_DELLINE: Subtract len from parent chunk, possibly deleting it | |
4526 * ML_CHNK_UPDLINE: Add len to parent chunk, as a signed entity. | |
4527 */ | |
4528 static void | |
4529 ml_updatechunk(buf, line, len, updtype) | |
4530 buf_T *buf; | |
4531 linenr_T line; | |
4532 long len; | |
4533 int updtype; | |
4534 { | |
4535 static buf_T *ml_upd_lastbuf = NULL; | |
4536 static linenr_T ml_upd_lastline; | |
4537 static linenr_T ml_upd_lastcurline; | |
4538 static int ml_upd_lastcurix; | |
4539 | |
4540 linenr_T curline = ml_upd_lastcurline; | |
4541 int curix = ml_upd_lastcurix; | |
4542 long size; | |
4543 chunksize_T *curchnk; | |
4544 int rest; | |
4545 bhdr_T *hp; | |
4546 DATA_BL *dp; | |
4547 | |
4548 if (buf->b_ml.ml_usedchunks == -1 || len == 0) | |
4549 return; | |
4550 if (buf->b_ml.ml_chunksize == NULL) | |
4551 { | |
4552 buf->b_ml.ml_chunksize = (chunksize_T *) | |
4553 alloc((unsigned)sizeof(chunksize_T) * 100); | |
4554 if (buf->b_ml.ml_chunksize == NULL) | |
4555 { | |
4556 buf->b_ml.ml_usedchunks = -1; | |
4557 return; | |
4558 } | |
4559 buf->b_ml.ml_numchunks = 100; | |
4560 buf->b_ml.ml_usedchunks = 1; | |
4561 buf->b_ml.ml_chunksize[0].mlcs_numlines = 1; | |
4562 buf->b_ml.ml_chunksize[0].mlcs_totalsize = 1; | |
4563 } | |
4564 | |
4565 if (updtype == ML_CHNK_UPDLINE && buf->b_ml.ml_line_count == 1) | |
4566 { | |
4567 /* | |
4568 * First line in empty buffer from ml_flush_line() -- reset | |
4569 */ | |
4570 buf->b_ml.ml_usedchunks = 1; | |
4571 buf->b_ml.ml_chunksize[0].mlcs_numlines = 1; | |
4572 buf->b_ml.ml_chunksize[0].mlcs_totalsize = | |
4573 (long)STRLEN(buf->b_ml.ml_line_ptr) + 1; | |
4574 return; | |
4575 } | |
4576 | |
4577 /* | |
4578 * Find chunk that our line belongs to, curline will be at start of the | |
4579 * chunk. | |
4580 */ | |
4581 if (buf != ml_upd_lastbuf || line != ml_upd_lastline + 1 | |
4582 || updtype != ML_CHNK_ADDLINE) | |
4583 { | |
4584 for (curline = 1, curix = 0; | |
4585 curix < buf->b_ml.ml_usedchunks - 1 | |
4586 && line >= curline + buf->b_ml.ml_chunksize[curix].mlcs_numlines; | |
4587 curix++) | |
4588 { | |
4589 curline += buf->b_ml.ml_chunksize[curix].mlcs_numlines; | |
4590 } | |
4591 } | |
4592 else if (line >= curline + buf->b_ml.ml_chunksize[curix].mlcs_numlines | |
4593 && curix < buf->b_ml.ml_usedchunks - 1) | |
4594 { | |
4595 /* Adjust cached curix & curline */ | |
4596 curline += buf->b_ml.ml_chunksize[curix].mlcs_numlines; | |
4597 curix++; | |
4598 } | |
4599 curchnk = buf->b_ml.ml_chunksize + curix; | |
4600 | |
4601 if (updtype == ML_CHNK_DELLINE) | |
1030 | 4602 len = -len; |
7 | 4603 curchnk->mlcs_totalsize += len; |
4604 if (updtype == ML_CHNK_ADDLINE) | |
4605 { | |
4606 curchnk->mlcs_numlines++; | |
4607 | |
4608 /* May resize here so we don't have to do it in both cases below */ | |
4609 if (buf->b_ml.ml_usedchunks + 1 >= buf->b_ml.ml_numchunks) | |
4610 { | |
4611 buf->b_ml.ml_numchunks = buf->b_ml.ml_numchunks * 3 / 2; | |
4612 buf->b_ml.ml_chunksize = (chunksize_T *) | |
4613 vim_realloc(buf->b_ml.ml_chunksize, | |
4614 sizeof(chunksize_T) * buf->b_ml.ml_numchunks); | |
4615 if (buf->b_ml.ml_chunksize == NULL) | |
4616 { | |
4617 /* Hmmmm, Give up on offset for this buffer */ | |
4618 buf->b_ml.ml_usedchunks = -1; | |
4619 return; | |
4620 } | |
4621 } | |
4622 | |
4623 if (buf->b_ml.ml_chunksize[curix].mlcs_numlines >= MLCS_MAXL) | |
4624 { | |
4625 int count; /* number of entries in block */ | |
4626 int idx; | |
4627 int text_end; | |
4628 int linecnt; | |
4629 | |
4630 mch_memmove(buf->b_ml.ml_chunksize + curix + 1, | |
4631 buf->b_ml.ml_chunksize + curix, | |
4632 (buf->b_ml.ml_usedchunks - curix) * | |
4633 sizeof(chunksize_T)); | |
1855 | 4634 /* Compute length of first half of lines in the split chunk */ |
7 | 4635 size = 0; |
4636 linecnt = 0; | |
4637 while (curline < buf->b_ml.ml_line_count | |
4638 && linecnt < MLCS_MINL) | |
4639 { | |
4640 if ((hp = ml_find_line(buf, curline, ML_FIND)) == NULL) | |
4641 { | |
4642 buf->b_ml.ml_usedchunks = -1; | |
4643 return; | |
4644 } | |
4645 dp = (DATA_BL *)(hp->bh_data); | |
4646 count = (long)(buf->b_ml.ml_locked_high) - | |
4647 (long)(buf->b_ml.ml_locked_low) + 1; | |
4648 idx = curline - buf->b_ml.ml_locked_low; | |
4649 curline = buf->b_ml.ml_locked_high + 1; | |
4650 if (idx == 0)/* first line in block, text at the end */ | |
4651 text_end = dp->db_txt_end; | |
4652 else | |
4653 text_end = ((dp->db_index[idx - 1]) & DB_INDEX_MASK); | |
4654 /* Compute index of last line to use in this MEMLINE */ | |
4655 rest = count - idx; | |
4656 if (linecnt + rest > MLCS_MINL) | |
4657 { | |
4658 idx += MLCS_MINL - linecnt - 1; | |
4659 linecnt = MLCS_MINL; | |
4660 } | |
4661 else | |
4662 { | |
4663 idx = count - 1; | |
4664 linecnt += rest; | |
4665 } | |
4666 size += text_end - ((dp->db_index[idx]) & DB_INDEX_MASK); | |
4667 } | |
4668 buf->b_ml.ml_chunksize[curix].mlcs_numlines = linecnt; | |
4669 buf->b_ml.ml_chunksize[curix + 1].mlcs_numlines -= linecnt; | |
4670 buf->b_ml.ml_chunksize[curix].mlcs_totalsize = size; | |
4671 buf->b_ml.ml_chunksize[curix + 1].mlcs_totalsize -= size; | |
4672 buf->b_ml.ml_usedchunks++; | |
4673 ml_upd_lastbuf = NULL; /* Force recalc of curix & curline */ | |
4674 return; | |
4675 } | |
4676 else if (buf->b_ml.ml_chunksize[curix].mlcs_numlines >= MLCS_MINL | |
4677 && curix == buf->b_ml.ml_usedchunks - 1 | |
4678 && buf->b_ml.ml_line_count - line <= 1) | |
4679 { | |
4680 /* | |
4681 * We are in the last chunk and it is cheap to crate a new one | |
4682 * after this. Do it now to avoid the loop above later on | |
4683 */ | |
4684 curchnk = buf->b_ml.ml_chunksize + curix + 1; | |
4685 buf->b_ml.ml_usedchunks++; | |
4686 if (line == buf->b_ml.ml_line_count) | |
4687 { | |
4688 curchnk->mlcs_numlines = 0; | |
4689 curchnk->mlcs_totalsize = 0; | |
4690 } | |
4691 else | |
4692 { | |
4693 /* | |
4694 * Line is just prior to last, move count for last | |
4695 * This is the common case when loading a new file | |
4696 */ | |
4697 hp = ml_find_line(buf, buf->b_ml.ml_line_count, ML_FIND); | |
4698 if (hp == NULL) | |
4699 { | |
4700 buf->b_ml.ml_usedchunks = -1; | |
4701 return; | |
4702 } | |
4703 dp = (DATA_BL *)(hp->bh_data); | |
4704 if (dp->db_line_count == 1) | |
4705 rest = dp->db_txt_end - dp->db_txt_start; | |
4706 else | |
4707 rest = | |
4708 ((dp->db_index[dp->db_line_count - 2]) & DB_INDEX_MASK) | |
4709 - dp->db_txt_start; | |
4710 curchnk->mlcs_totalsize = rest; | |
4711 curchnk->mlcs_numlines = 1; | |
4712 curchnk[-1].mlcs_totalsize -= rest; | |
4713 curchnk[-1].mlcs_numlines -= 1; | |
4714 } | |
4715 } | |
4716 } | |
4717 else if (updtype == ML_CHNK_DELLINE) | |
4718 { | |
4719 curchnk->mlcs_numlines--; | |
4720 ml_upd_lastbuf = NULL; /* Force recalc of curix & curline */ | |
4721 if (curix < (buf->b_ml.ml_usedchunks - 1) | |
4722 && (curchnk->mlcs_numlines + curchnk[1].mlcs_numlines) | |
4723 <= MLCS_MINL) | |
4724 { | |
4725 curix++; | |
4726 curchnk = buf->b_ml.ml_chunksize + curix; | |
4727 } | |
4728 else if (curix == 0 && curchnk->mlcs_numlines <= 0) | |
4729 { | |
4730 buf->b_ml.ml_usedchunks--; | |
4731 mch_memmove(buf->b_ml.ml_chunksize, buf->b_ml.ml_chunksize + 1, | |
4732 buf->b_ml.ml_usedchunks * sizeof(chunksize_T)); | |
4733 return; | |
4734 } | |
4735 else if (curix == 0 || (curchnk->mlcs_numlines > 10 | |
4736 && (curchnk->mlcs_numlines + curchnk[-1].mlcs_numlines) | |
4737 > MLCS_MINL)) | |
4738 { | |
4739 return; | |
4740 } | |
4741 | |
4742 /* Collapse chunks */ | |
4743 curchnk[-1].mlcs_numlines += curchnk->mlcs_numlines; | |
4744 curchnk[-1].mlcs_totalsize += curchnk->mlcs_totalsize; | |
4745 buf->b_ml.ml_usedchunks--; | |
4746 if (curix < buf->b_ml.ml_usedchunks) | |
4747 { | |
4748 mch_memmove(buf->b_ml.ml_chunksize + curix, | |
4749 buf->b_ml.ml_chunksize + curix + 1, | |
4750 (buf->b_ml.ml_usedchunks - curix) * | |
4751 sizeof(chunksize_T)); | |
4752 } | |
4753 return; | |
4754 } | |
4755 ml_upd_lastbuf = buf; | |
4756 ml_upd_lastline = line; | |
4757 ml_upd_lastcurline = curline; | |
4758 ml_upd_lastcurix = curix; | |
4759 } | |
4760 | |
4761 /* | |
4762 * Find offset for line or line with offset. | |
169 | 4763 * Find line with offset if "lnum" is 0; return remaining offset in offp |
4764 * Find offset of line if "lnum" > 0 | |
7 | 4765 * return -1 if information is not available |
4766 */ | |
4767 long | |
169 | 4768 ml_find_line_or_offset(buf, lnum, offp) |
7 | 4769 buf_T *buf; |
169 | 4770 linenr_T lnum; |
7 | 4771 long *offp; |
4772 { | |
4773 linenr_T curline; | |
4774 int curix; | |
4775 long size; | |
4776 bhdr_T *hp; | |
4777 DATA_BL *dp; | |
4778 int count; /* number of entries in block */ | |
4779 int idx; | |
4780 int start_idx; | |
4781 int text_end; | |
4782 long offset; | |
4783 int len; | |
4784 int ffdos = (get_fileformat(buf) == EOL_DOS); | |
4785 int extra = 0; | |
4786 | |
169 | 4787 /* take care of cached line first */ |
4788 ml_flush_line(curbuf); | |
4789 | |
7 | 4790 if (buf->b_ml.ml_usedchunks == -1 |
4791 || buf->b_ml.ml_chunksize == NULL | |
169 | 4792 || lnum < 0) |
7 | 4793 return -1; |
4794 | |
4795 if (offp == NULL) | |
4796 offset = 0; | |
4797 else | |
4798 offset = *offp; | |
169 | 4799 if (lnum == 0 && offset <= 0) |
7 | 4800 return 1; /* Not a "find offset" and offset 0 _must_ be in line 1 */ |
4801 /* | |
4802 * Find the last chunk before the one containing our line. Last chunk is | |
4803 * special because it will never qualify | |
4804 */ | |
4805 curline = 1; | |
4806 curix = size = 0; | |
4807 while (curix < buf->b_ml.ml_usedchunks - 1 | |
169 | 4808 && ((lnum != 0 |
4809 && lnum >= curline + buf->b_ml.ml_chunksize[curix].mlcs_numlines) | |
7 | 4810 || (offset != 0 |
4811 && offset > size + buf->b_ml.ml_chunksize[curix].mlcs_totalsize | |
4812 + ffdos * buf->b_ml.ml_chunksize[curix].mlcs_numlines))) | |
4813 { | |
4814 curline += buf->b_ml.ml_chunksize[curix].mlcs_numlines; | |
4815 size += buf->b_ml.ml_chunksize[curix].mlcs_totalsize; | |
4816 if (offset && ffdos) | |
4817 size += buf->b_ml.ml_chunksize[curix].mlcs_numlines; | |
4818 curix++; | |
4819 } | |
4820 | |
169 | 4821 while ((lnum != 0 && curline < lnum) || (offset != 0 && size < offset)) |
7 | 4822 { |
4823 if (curline > buf->b_ml.ml_line_count | |
4824 || (hp = ml_find_line(buf, curline, ML_FIND)) == NULL) | |
4825 return -1; | |
4826 dp = (DATA_BL *)(hp->bh_data); | |
4827 count = (long)(buf->b_ml.ml_locked_high) - | |
4828 (long)(buf->b_ml.ml_locked_low) + 1; | |
4829 start_idx = idx = curline - buf->b_ml.ml_locked_low; | |
4830 if (idx == 0)/* first line in block, text at the end */ | |
4831 text_end = dp->db_txt_end; | |
4832 else | |
4833 text_end = ((dp->db_index[idx - 1]) & DB_INDEX_MASK); | |
4834 /* Compute index of last line to use in this MEMLINE */ | |
169 | 4835 if (lnum != 0) |
7 | 4836 { |
169 | 4837 if (curline + (count - idx) >= lnum) |
4838 idx += lnum - curline - 1; | |
7 | 4839 else |
4840 idx = count - 1; | |
4841 } | |
4842 else | |
4843 { | |
4844 extra = 0; | |
4845 while (offset >= size | |
4846 + text_end - (int)((dp->db_index[idx]) & DB_INDEX_MASK) | |
4847 + ffdos) | |
4848 { | |
4849 if (ffdos) | |
4850 size++; | |
4851 if (idx == count - 1) | |
4852 { | |
4853 extra = 1; | |
4854 break; | |
4855 } | |
4856 idx++; | |
4857 } | |
4858 } | |
4859 len = text_end - ((dp->db_index[idx]) & DB_INDEX_MASK); | |
4860 size += len; | |
4861 if (offset != 0 && size >= offset) | |
4862 { | |
4863 if (size + ffdos == offset) | |
4864 *offp = 0; | |
4865 else if (idx == start_idx) | |
4866 *offp = offset - size + len; | |
4867 else | |
4868 *offp = offset - size + len | |
4869 - (text_end - ((dp->db_index[idx - 1]) & DB_INDEX_MASK)); | |
4870 curline += idx - start_idx + extra; | |
4871 if (curline > buf->b_ml.ml_line_count) | |
4872 return -1; /* exactly one byte beyond the end */ | |
4873 return curline; | |
4874 } | |
4875 curline = buf->b_ml.ml_locked_high + 1; | |
4876 } | |
4877 | |
169 | 4878 if (lnum != 0) |
20 | 4879 { |
4880 /* Count extra CR characters. */ | |
4881 if (ffdos) | |
169 | 4882 size += lnum - 1; |
20 | 4883 |
4884 /* Don't count the last line break if 'bin' and 'noeol'. */ | |
4885 if (buf->b_p_bin && !buf->b_p_eol) | |
4886 size -= ffdos + 1; | |
4887 } | |
4888 | |
7 | 4889 return size; |
4890 } | |
4891 | |
4892 /* | |
4893 * Goto byte in buffer with offset 'cnt'. | |
4894 */ | |
4895 void | |
4896 goto_byte(cnt) | |
4897 long cnt; | |
4898 { | |
4899 long boff = cnt; | |
4900 linenr_T lnum; | |
4901 | |
4902 ml_flush_line(curbuf); /* cached line may be dirty */ | |
4903 setpcmark(); | |
4904 if (boff) | |
4905 --boff; | |
4906 lnum = ml_find_line_or_offset(curbuf, (linenr_T)0, &boff); | |
4907 if (lnum < 1) /* past the end */ | |
4908 { | |
4909 curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count; | |
4910 curwin->w_curswant = MAXCOL; | |
4911 coladvance((colnr_T)MAXCOL); | |
4912 } | |
4913 else | |
4914 { | |
4915 curwin->w_cursor.lnum = lnum; | |
4916 curwin->w_cursor.col = (colnr_T)boff; | |
572 | 4917 # ifdef FEAT_VIRTUALEDIT |
4918 curwin->w_cursor.coladd = 0; | |
4919 # endif | |
7 | 4920 curwin->w_set_curswant = TRUE; |
4921 } | |
4922 check_cursor(); | |
4923 | |
4924 # ifdef FEAT_MBYTE | |
4925 /* Make sure the cursor is on the first byte of a multi-byte char. */ | |
4926 if (has_mbyte) | |
4927 mb_adjust_cursor(); | |
4928 # endif | |
4929 } | |
4930 #endif |