]>
Commit | Line | Data |
---|---|---|
1 | #include "cache.h" | |
2 | #include "commit.h" | |
3 | #include "blob.h" | |
4 | #include "diff.h" | |
5 | #include "diffcore.h" | |
6 | #include "quote.h" | |
7 | #include "xdiff-interface.h" | |
8 | #include "xdiff/xmacros.h" | |
9 | #include "log-tree.h" | |
10 | #include "refs.h" | |
11 | #include "userdiff.h" | |
12 | #include "sha1-array.h" | |
13 | #include "revision.h" | |
14 | ||
15 | static int compare_paths(const struct combine_diff_path *one, | |
16 | const struct diff_filespec *two) | |
17 | { | |
18 | if (!S_ISDIR(one->mode) && !S_ISDIR(two->mode)) | |
19 | return strcmp(one->path, two->path); | |
20 | ||
21 | return base_name_compare(one->path, strlen(one->path), one->mode, | |
22 | two->path, strlen(two->path), two->mode); | |
23 | } | |
24 | ||
25 | static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent) | |
26 | { | |
27 | struct diff_queue_struct *q = &diff_queued_diff; | |
28 | struct combine_diff_path *p, **tail = &curr; | |
29 | int i, cmp; | |
30 | ||
31 | if (!n) { | |
32 | for (i = 0; i < q->nr; i++) { | |
33 | int len; | |
34 | const char *path; | |
35 | if (diff_unmodified_pair(q->queue[i])) | |
36 | continue; | |
37 | path = q->queue[i]->two->path; | |
38 | len = strlen(path); | |
39 | p = xmalloc(combine_diff_path_size(num_parent, len)); | |
40 | p->path = (char *) &(p->parent[num_parent]); | |
41 | memcpy(p->path, path, len); | |
42 | p->path[len] = 0; | |
43 | p->next = NULL; | |
44 | memset(p->parent, 0, | |
45 | sizeof(p->parent[0]) * num_parent); | |
46 | ||
47 | oidcpy(&p->oid, &q->queue[i]->two->oid); | |
48 | p->mode = q->queue[i]->two->mode; | |
49 | oidcpy(&p->parent[n].oid, &q->queue[i]->one->oid); | |
50 | p->parent[n].mode = q->queue[i]->one->mode; | |
51 | p->parent[n].status = q->queue[i]->status; | |
52 | *tail = p; | |
53 | tail = &p->next; | |
54 | } | |
55 | return curr; | |
56 | } | |
57 | ||
58 | /* | |
59 | * paths in curr (linked list) and q->queue[] (array) are | |
60 | * both sorted in the tree order. | |
61 | */ | |
62 | i = 0; | |
63 | while ((p = *tail) != NULL) { | |
64 | cmp = ((i >= q->nr) | |
65 | ? -1 : compare_paths(p, q->queue[i]->two)); | |
66 | ||
67 | if (cmp < 0) { | |
68 | /* p->path not in q->queue[]; drop it */ | |
69 | *tail = p->next; | |
70 | free(p); | |
71 | continue; | |
72 | } | |
73 | ||
74 | if (cmp > 0) { | |
75 | /* q->queue[i] not in p->path; skip it */ | |
76 | i++; | |
77 | continue; | |
78 | } | |
79 | ||
80 | oidcpy(&p->parent[n].oid, &q->queue[i]->one->oid); | |
81 | p->parent[n].mode = q->queue[i]->one->mode; | |
82 | p->parent[n].status = q->queue[i]->status; | |
83 | ||
84 | tail = &p->next; | |
85 | i++; | |
86 | } | |
87 | return curr; | |
88 | } | |
89 | ||
90 | /* Lines lost from parent */ | |
91 | struct lline { | |
92 | struct lline *next, *prev; | |
93 | int len; | |
94 | unsigned long parent_map; | |
95 | char line[FLEX_ARRAY]; | |
96 | }; | |
97 | ||
98 | /* Lines lost from current parent (before coalescing) */ | |
99 | struct plost { | |
100 | struct lline *lost_head, *lost_tail; | |
101 | int len; | |
102 | }; | |
103 | ||
104 | /* Lines surviving in the merge result */ | |
105 | struct sline { | |
106 | /* Accumulated and coalesced lost lines */ | |
107 | struct lline *lost; | |
108 | int lenlost; | |
109 | struct plost plost; | |
110 | char *bol; | |
111 | int len; | |
112 | /* bit 0 up to (N-1) are on if the parent has this line (i.e. | |
113 | * we did not change it). | |
114 | * bit N is used for "interesting" lines, including context. | |
115 | * bit (N+1) is used for "do not show deletion before this". | |
116 | */ | |
117 | unsigned long flag; | |
118 | unsigned long *p_lno; | |
119 | }; | |
120 | ||
121 | static int match_string_spaces(const char *line1, int len1, | |
122 | const char *line2, int len2, | |
123 | long flags) | |
124 | { | |
125 | if (flags & XDF_WHITESPACE_FLAGS) { | |
126 | for (; len1 > 0 && XDL_ISSPACE(line1[len1 - 1]); len1--); | |
127 | for (; len2 > 0 && XDL_ISSPACE(line2[len2 - 1]); len2--); | |
128 | } | |
129 | ||
130 | if (!(flags & (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE))) | |
131 | return (len1 == len2 && !memcmp(line1, line2, len1)); | |
132 | ||
133 | while (len1 > 0 && len2 > 0) { | |
134 | len1--; | |
135 | len2--; | |
136 | if (XDL_ISSPACE(line1[len1]) || XDL_ISSPACE(line2[len2])) { | |
137 | if ((flags & XDF_IGNORE_WHITESPACE_CHANGE) && | |
138 | (!XDL_ISSPACE(line1[len1]) || !XDL_ISSPACE(line2[len2]))) | |
139 | return 0; | |
140 | ||
141 | for (; len1 > 0 && XDL_ISSPACE(line1[len1]); len1--); | |
142 | for (; len2 > 0 && XDL_ISSPACE(line2[len2]); len2--); | |
143 | } | |
144 | if (line1[len1] != line2[len2]) | |
145 | return 0; | |
146 | } | |
147 | ||
148 | if (flags & XDF_IGNORE_WHITESPACE) { | |
149 | /* Consume remaining spaces */ | |
150 | for (; len1 > 0 && XDL_ISSPACE(line1[len1 - 1]); len1--); | |
151 | for (; len2 > 0 && XDL_ISSPACE(line2[len2 - 1]); len2--); | |
152 | } | |
153 | ||
154 | /* We matched full line1 and line2 */ | |
155 | if (!len1 && !len2) | |
156 | return 1; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | enum coalesce_direction { MATCH, BASE, NEW }; | |
162 | ||
163 | /* Coalesce new lines into base by finding LCS */ | |
164 | static struct lline *coalesce_lines(struct lline *base, int *lenbase, | |
165 | struct lline *new, int lennew, | |
166 | unsigned long parent, long flags) | |
167 | { | |
168 | int **lcs; | |
169 | enum coalesce_direction **directions; | |
170 | struct lline *baseend, *newend = NULL; | |
171 | int i, j, origbaselen = *lenbase; | |
172 | ||
173 | if (new == NULL) | |
174 | return base; | |
175 | ||
176 | if (base == NULL) { | |
177 | *lenbase = lennew; | |
178 | return new; | |
179 | } | |
180 | ||
181 | /* | |
182 | * Coalesce new lines into base by finding the LCS | |
183 | * - Create the table to run dynamic programming | |
184 | * - Compute the LCS | |
185 | * - Then reverse read the direction structure: | |
186 | * - If we have MATCH, assign parent to base flag, and consume | |
187 | * both baseend and newend | |
188 | * - Else if we have BASE, consume baseend | |
189 | * - Else if we have NEW, insert newend lline into base and | |
190 | * consume newend | |
191 | */ | |
192 | lcs = xcalloc(st_add(origbaselen, 1), sizeof(int*)); | |
193 | directions = xcalloc(st_add(origbaselen, 1), sizeof(enum coalesce_direction*)); | |
194 | for (i = 0; i < origbaselen + 1; i++) { | |
195 | lcs[i] = xcalloc(st_add(lennew, 1), sizeof(int)); | |
196 | directions[i] = xcalloc(st_add(lennew, 1), sizeof(enum coalesce_direction)); | |
197 | directions[i][0] = BASE; | |
198 | } | |
199 | for (j = 1; j < lennew + 1; j++) | |
200 | directions[0][j] = NEW; | |
201 | ||
202 | for (i = 1, baseend = base; i < origbaselen + 1; i++) { | |
203 | for (j = 1, newend = new; j < lennew + 1; j++) { | |
204 | if (match_string_spaces(baseend->line, baseend->len, | |
205 | newend->line, newend->len, flags)) { | |
206 | lcs[i][j] = lcs[i - 1][j - 1] + 1; | |
207 | directions[i][j] = MATCH; | |
208 | } else if (lcs[i][j - 1] >= lcs[i - 1][j]) { | |
209 | lcs[i][j] = lcs[i][j - 1]; | |
210 | directions[i][j] = NEW; | |
211 | } else { | |
212 | lcs[i][j] = lcs[i - 1][j]; | |
213 | directions[i][j] = BASE; | |
214 | } | |
215 | if (newend->next) | |
216 | newend = newend->next; | |
217 | } | |
218 | if (baseend->next) | |
219 | baseend = baseend->next; | |
220 | } | |
221 | ||
222 | for (i = 0; i < origbaselen + 1; i++) | |
223 | free(lcs[i]); | |
224 | free(lcs); | |
225 | ||
226 | /* At this point, baseend and newend point to the end of each lists */ | |
227 | i--; | |
228 | j--; | |
229 | while (i != 0 || j != 0) { | |
230 | if (directions[i][j] == MATCH) { | |
231 | baseend->parent_map |= 1<<parent; | |
232 | baseend = baseend->prev; | |
233 | newend = newend->prev; | |
234 | i--; | |
235 | j--; | |
236 | } else if (directions[i][j] == NEW) { | |
237 | struct lline *lline; | |
238 | ||
239 | lline = newend; | |
240 | /* Remove lline from new list and update newend */ | |
241 | if (lline->prev) | |
242 | lline->prev->next = lline->next; | |
243 | else | |
244 | new = lline->next; | |
245 | if (lline->next) | |
246 | lline->next->prev = lline->prev; | |
247 | ||
248 | newend = lline->prev; | |
249 | j--; | |
250 | ||
251 | /* Add lline to base list */ | |
252 | if (baseend) { | |
253 | lline->next = baseend->next; | |
254 | lline->prev = baseend; | |
255 | if (lline->prev) | |
256 | lline->prev->next = lline; | |
257 | } | |
258 | else { | |
259 | lline->next = base; | |
260 | base = lline; | |
261 | } | |
262 | (*lenbase)++; | |
263 | ||
264 | if (lline->next) | |
265 | lline->next->prev = lline; | |
266 | ||
267 | } else { | |
268 | baseend = baseend->prev; | |
269 | i--; | |
270 | } | |
271 | } | |
272 | ||
273 | newend = new; | |
274 | while (newend) { | |
275 | struct lline *lline = newend; | |
276 | newend = newend->next; | |
277 | free(lline); | |
278 | } | |
279 | ||
280 | for (i = 0; i < origbaselen + 1; i++) | |
281 | free(directions[i]); | |
282 | free(directions); | |
283 | ||
284 | return base; | |
285 | } | |
286 | ||
287 | static char *grab_blob(const struct object_id *oid, unsigned int mode, | |
288 | unsigned long *size, struct userdiff_driver *textconv, | |
289 | const char *path) | |
290 | { | |
291 | char *blob; | |
292 | enum object_type type; | |
293 | ||
294 | if (S_ISGITLINK(mode)) { | |
295 | struct strbuf buf = STRBUF_INIT; | |
296 | strbuf_addf(&buf, "Subproject commit %s\n", oid_to_hex(oid)); | |
297 | *size = buf.len; | |
298 | blob = strbuf_detach(&buf, NULL); | |
299 | } else if (is_null_oid(oid)) { | |
300 | /* deleted blob */ | |
301 | *size = 0; | |
302 | return xcalloc(1, 1); | |
303 | } else if (textconv) { | |
304 | struct diff_filespec *df = alloc_filespec(path); | |
305 | fill_filespec(df, oid, 1, mode); | |
306 | *size = fill_textconv(textconv, df, &blob); | |
307 | free_filespec(df); | |
308 | } else { | |
309 | blob = read_sha1_file(oid->hash, &type, size); | |
310 | if (type != OBJ_BLOB) | |
311 | die("object '%s' is not a blob!", oid_to_hex(oid)); | |
312 | } | |
313 | return blob; | |
314 | } | |
315 | ||
316 | static void append_lost(struct sline *sline, int n, const char *line, int len) | |
317 | { | |
318 | struct lline *lline; | |
319 | unsigned long this_mask = (1UL<<n); | |
320 | if (line[len-1] == '\n') | |
321 | len--; | |
322 | ||
323 | FLEX_ALLOC_MEM(lline, line, line, len); | |
324 | lline->len = len; | |
325 | lline->next = NULL; | |
326 | lline->prev = sline->plost.lost_tail; | |
327 | if (lline->prev) | |
328 | lline->prev->next = lline; | |
329 | else | |
330 | sline->plost.lost_head = lline; | |
331 | sline->plost.lost_tail = lline; | |
332 | sline->plost.len++; | |
333 | lline->parent_map = this_mask; | |
334 | } | |
335 | ||
336 | struct combine_diff_state { | |
337 | unsigned int lno; | |
338 | int ob, on, nb, nn; | |
339 | unsigned long nmask; | |
340 | int num_parent; | |
341 | int n; | |
342 | struct sline *sline; | |
343 | struct sline *lost_bucket; | |
344 | }; | |
345 | ||
346 | static void consume_line(void *state_, char *line, unsigned long len) | |
347 | { | |
348 | struct combine_diff_state *state = state_; | |
349 | if (5 < len && !memcmp("@@ -", line, 4)) { | |
350 | if (parse_hunk_header(line, len, | |
351 | &state->ob, &state->on, | |
352 | &state->nb, &state->nn)) | |
353 | return; | |
354 | state->lno = state->nb; | |
355 | if (state->nn == 0) { | |
356 | /* @@ -X,Y +N,0 @@ removed Y lines | |
357 | * that would have come *after* line N | |
358 | * in the result. Our lost buckets hang | |
359 | * to the line after the removed lines, | |
360 | * | |
361 | * Note that this is correct even when N == 0, | |
362 | * in which case the hunk removes the first | |
363 | * line in the file. | |
364 | */ | |
365 | state->lost_bucket = &state->sline[state->nb]; | |
366 | if (!state->nb) | |
367 | state->nb = 1; | |
368 | } else { | |
369 | state->lost_bucket = &state->sline[state->nb-1]; | |
370 | } | |
371 | if (!state->sline[state->nb-1].p_lno) | |
372 | state->sline[state->nb-1].p_lno = | |
373 | xcalloc(state->num_parent, | |
374 | sizeof(unsigned long)); | |
375 | state->sline[state->nb-1].p_lno[state->n] = state->ob; | |
376 | return; | |
377 | } | |
378 | if (!state->lost_bucket) | |
379 | return; /* not in any hunk yet */ | |
380 | switch (line[0]) { | |
381 | case '-': | |
382 | append_lost(state->lost_bucket, state->n, line+1, len-1); | |
383 | break; | |
384 | case '+': | |
385 | state->sline[state->lno-1].flag |= state->nmask; | |
386 | state->lno++; | |
387 | break; | |
388 | } | |
389 | } | |
390 | ||
391 | static void combine_diff(const struct object_id *parent, unsigned int mode, | |
392 | mmfile_t *result_file, | |
393 | struct sline *sline, unsigned int cnt, int n, | |
394 | int num_parent, int result_deleted, | |
395 | struct userdiff_driver *textconv, | |
396 | const char *path, long flags) | |
397 | { | |
398 | unsigned int p_lno, lno; | |
399 | unsigned long nmask = (1UL << n); | |
400 | xpparam_t xpp; | |
401 | xdemitconf_t xecfg; | |
402 | mmfile_t parent_file; | |
403 | struct combine_diff_state state; | |
404 | unsigned long sz; | |
405 | ||
406 | if (result_deleted) | |
407 | return; /* result deleted */ | |
408 | ||
409 | parent_file.ptr = grab_blob(parent, mode, &sz, textconv, path); | |
410 | parent_file.size = sz; | |
411 | memset(&xpp, 0, sizeof(xpp)); | |
412 | xpp.flags = flags; | |
413 | memset(&xecfg, 0, sizeof(xecfg)); | |
414 | memset(&state, 0, sizeof(state)); | |
415 | state.nmask = nmask; | |
416 | state.sline = sline; | |
417 | state.lno = 1; | |
418 | state.num_parent = num_parent; | |
419 | state.n = n; | |
420 | ||
421 | if (xdi_diff_outf(&parent_file, result_file, consume_line, &state, | |
422 | &xpp, &xecfg)) | |
423 | die("unable to generate combined diff for %s", | |
424 | oid_to_hex(parent)); | |
425 | free(parent_file.ptr); | |
426 | ||
427 | /* Assign line numbers for this parent. | |
428 | * | |
429 | * sline[lno].p_lno[n] records the first line number | |
430 | * (counting from 1) for parent N if the final hunk display | |
431 | * started by showing sline[lno] (possibly showing the lost | |
432 | * lines attached to it first). | |
433 | */ | |
434 | for (lno = 0, p_lno = 1; lno <= cnt; lno++) { | |
435 | struct lline *ll; | |
436 | sline[lno].p_lno[n] = p_lno; | |
437 | ||
438 | /* Coalesce new lines */ | |
439 | if (sline[lno].plost.lost_head) { | |
440 | struct sline *sl = &sline[lno]; | |
441 | sl->lost = coalesce_lines(sl->lost, &sl->lenlost, | |
442 | sl->plost.lost_head, | |
443 | sl->plost.len, n, flags); | |
444 | sl->plost.lost_head = sl->plost.lost_tail = NULL; | |
445 | sl->plost.len = 0; | |
446 | } | |
447 | ||
448 | /* How many lines would this sline advance the p_lno? */ | |
449 | ll = sline[lno].lost; | |
450 | while (ll) { | |
451 | if (ll->parent_map & nmask) | |
452 | p_lno++; /* '-' means parent had it */ | |
453 | ll = ll->next; | |
454 | } | |
455 | if (lno < cnt && !(sline[lno].flag & nmask)) | |
456 | p_lno++; /* no '+' means parent had it */ | |
457 | } | |
458 | sline[lno].p_lno[n] = p_lno; /* trailer */ | |
459 | } | |
460 | ||
461 | static unsigned long context = 3; | |
462 | static char combine_marker = '@'; | |
463 | ||
464 | static int interesting(struct sline *sline, unsigned long all_mask) | |
465 | { | |
466 | /* If some parents lost lines here, or if we have added to | |
467 | * some parent, it is interesting. | |
468 | */ | |
469 | return ((sline->flag & all_mask) || sline->lost); | |
470 | } | |
471 | ||
472 | static unsigned long adjust_hunk_tail(struct sline *sline, | |
473 | unsigned long all_mask, | |
474 | unsigned long hunk_begin, | |
475 | unsigned long i) | |
476 | { | |
477 | /* i points at the first uninteresting line. If the last line | |
478 | * of the hunk was interesting only because it has some | |
479 | * deletion, then it is not all that interesting for the | |
480 | * purpose of giving trailing context lines. This is because | |
481 | * we output '-' line and then unmodified sline[i-1] itself in | |
482 | * that case which gives us one extra context line. | |
483 | */ | |
484 | if ((hunk_begin + 1 <= i) && !(sline[i-1].flag & all_mask)) | |
485 | i--; | |
486 | return i; | |
487 | } | |
488 | ||
489 | static unsigned long find_next(struct sline *sline, | |
490 | unsigned long mark, | |
491 | unsigned long i, | |
492 | unsigned long cnt, | |
493 | int look_for_uninteresting) | |
494 | { | |
495 | /* We have examined up to i-1 and are about to look at i. | |
496 | * Find next interesting or uninteresting line. Here, | |
497 | * "interesting" does not mean interesting(), but marked by | |
498 | * the give_context() function below (i.e. it includes context | |
499 | * lines that are not interesting to interesting() function | |
500 | * that are surrounded by interesting() ones. | |
501 | */ | |
502 | while (i <= cnt) | |
503 | if (look_for_uninteresting | |
504 | ? !(sline[i].flag & mark) | |
505 | : (sline[i].flag & mark)) | |
506 | return i; | |
507 | else | |
508 | i++; | |
509 | return i; | |
510 | } | |
511 | ||
512 | static int give_context(struct sline *sline, unsigned long cnt, int num_parent) | |
513 | { | |
514 | unsigned long all_mask = (1UL<<num_parent) - 1; | |
515 | unsigned long mark = (1UL<<num_parent); | |
516 | unsigned long no_pre_delete = (2UL<<num_parent); | |
517 | unsigned long i; | |
518 | ||
519 | /* Two groups of interesting lines may have a short gap of | |
520 | * uninteresting lines. Connect such groups to give them a | |
521 | * bit of context. | |
522 | * | |
523 | * We first start from what the interesting() function says, | |
524 | * and mark them with "mark", and paint context lines with the | |
525 | * mark. So interesting() would still say false for such context | |
526 | * lines but they are treated as "interesting" in the end. | |
527 | */ | |
528 | i = find_next(sline, mark, 0, cnt, 0); | |
529 | if (cnt < i) | |
530 | return 0; | |
531 | ||
532 | while (i <= cnt) { | |
533 | unsigned long j = (context < i) ? (i - context) : 0; | |
534 | unsigned long k; | |
535 | ||
536 | /* Paint a few lines before the first interesting line. */ | |
537 | while (j < i) { | |
538 | if (!(sline[j].flag & mark)) | |
539 | sline[j].flag |= no_pre_delete; | |
540 | sline[j++].flag |= mark; | |
541 | } | |
542 | ||
543 | again: | |
544 | /* we know up to i is to be included. where does the | |
545 | * next uninteresting one start? | |
546 | */ | |
547 | j = find_next(sline, mark, i, cnt, 1); | |
548 | if (cnt < j) | |
549 | break; /* the rest are all interesting */ | |
550 | ||
551 | /* lookahead context lines */ | |
552 | k = find_next(sline, mark, j, cnt, 0); | |
553 | j = adjust_hunk_tail(sline, all_mask, i, j); | |
554 | ||
555 | if (k < j + context) { | |
556 | /* k is interesting and [j,k) are not, but | |
557 | * paint them interesting because the gap is small. | |
558 | */ | |
559 | while (j < k) | |
560 | sline[j++].flag |= mark; | |
561 | i = k; | |
562 | goto again; | |
563 | } | |
564 | ||
565 | /* j is the first uninteresting line and there is | |
566 | * no overlap beyond it within context lines. Paint | |
567 | * the trailing edge a bit. | |
568 | */ | |
569 | i = k; | |
570 | k = (j + context < cnt+1) ? j + context : cnt+1; | |
571 | while (j < k) | |
572 | sline[j++].flag |= mark; | |
573 | } | |
574 | return 1; | |
575 | } | |
576 | ||
577 | static int make_hunks(struct sline *sline, unsigned long cnt, | |
578 | int num_parent, int dense) | |
579 | { | |
580 | unsigned long all_mask = (1UL<<num_parent) - 1; | |
581 | unsigned long mark = (1UL<<num_parent); | |
582 | unsigned long i; | |
583 | int has_interesting = 0; | |
584 | ||
585 | for (i = 0; i <= cnt; i++) { | |
586 | if (interesting(&sline[i], all_mask)) | |
587 | sline[i].flag |= mark; | |
588 | else | |
589 | sline[i].flag &= ~mark; | |
590 | } | |
591 | if (!dense) | |
592 | return give_context(sline, cnt, num_parent); | |
593 | ||
594 | /* Look at each hunk, and if we have changes from only one | |
595 | * parent, or the changes are the same from all but one | |
596 | * parent, mark that uninteresting. | |
597 | */ | |
598 | i = 0; | |
599 | while (i <= cnt) { | |
600 | unsigned long j, hunk_begin, hunk_end; | |
601 | unsigned long same_diff; | |
602 | while (i <= cnt && !(sline[i].flag & mark)) | |
603 | i++; | |
604 | if (cnt < i) | |
605 | break; /* No more interesting hunks */ | |
606 | hunk_begin = i; | |
607 | for (j = i + 1; j <= cnt; j++) { | |
608 | if (!(sline[j].flag & mark)) { | |
609 | /* Look beyond the end to see if there | |
610 | * is an interesting line after this | |
611 | * hunk within context span. | |
612 | */ | |
613 | unsigned long la; /* lookahead */ | |
614 | int contin = 0; | |
615 | la = adjust_hunk_tail(sline, all_mask, | |
616 | hunk_begin, j); | |
617 | la = (la + context < cnt + 1) ? | |
618 | (la + context) : cnt + 1; | |
619 | while (la && j <= --la) { | |
620 | if (sline[la].flag & mark) { | |
621 | contin = 1; | |
622 | break; | |
623 | } | |
624 | } | |
625 | if (!contin) | |
626 | break; | |
627 | j = la; | |
628 | } | |
629 | } | |
630 | hunk_end = j; | |
631 | ||
632 | /* [i..hunk_end) are interesting. Now is it really | |
633 | * interesting? We check if there are only two versions | |
634 | * and the result matches one of them. That is, we look | |
635 | * at: | |
636 | * (+) line, which records lines added to which parents; | |
637 | * this line appears in the result. | |
638 | * (-) line, which records from what parents the line | |
639 | * was removed; this line does not appear in the result. | |
640 | * then check the set of parents the result has difference | |
641 | * from, from all lines. If there are lines that has | |
642 | * different set of parents that the result has differences | |
643 | * from, that means we have more than two versions. | |
644 | * | |
645 | * Even when we have only two versions, if the result does | |
646 | * not match any of the parents, the it should be considered | |
647 | * interesting. In such a case, we would have all '+' line. | |
648 | * After passing the above "two versions" test, that would | |
649 | * appear as "the same set of parents" to be "all parents". | |
650 | */ | |
651 | same_diff = 0; | |
652 | has_interesting = 0; | |
653 | for (j = i; j < hunk_end && !has_interesting; j++) { | |
654 | unsigned long this_diff = sline[j].flag & all_mask; | |
655 | struct lline *ll = sline[j].lost; | |
656 | if (this_diff) { | |
657 | /* This has some changes. Is it the | |
658 | * same as others? | |
659 | */ | |
660 | if (!same_diff) | |
661 | same_diff = this_diff; | |
662 | else if (same_diff != this_diff) { | |
663 | has_interesting = 1; | |
664 | break; | |
665 | } | |
666 | } | |
667 | while (ll && !has_interesting) { | |
668 | /* Lost this line from these parents; | |
669 | * who are they? Are they the same? | |
670 | */ | |
671 | this_diff = ll->parent_map; | |
672 | if (!same_diff) | |
673 | same_diff = this_diff; | |
674 | else if (same_diff != this_diff) { | |
675 | has_interesting = 1; | |
676 | } | |
677 | ll = ll->next; | |
678 | } | |
679 | } | |
680 | ||
681 | if (!has_interesting && same_diff != all_mask) { | |
682 | /* This hunk is not that interesting after all */ | |
683 | for (j = hunk_begin; j < hunk_end; j++) | |
684 | sline[j].flag &= ~mark; | |
685 | } | |
686 | i = hunk_end; | |
687 | } | |
688 | ||
689 | has_interesting = give_context(sline, cnt, num_parent); | |
690 | return has_interesting; | |
691 | } | |
692 | ||
693 | static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n, unsigned long null_context) | |
694 | { | |
695 | l0 = sline[l0].p_lno[n]; | |
696 | l1 = sline[l1].p_lno[n]; | |
697 | printf(" -%lu,%lu", l0, l1-l0-null_context); | |
698 | } | |
699 | ||
700 | static int hunk_comment_line(const char *bol) | |
701 | { | |
702 | int ch; | |
703 | ||
704 | if (!bol) | |
705 | return 0; | |
706 | ch = *bol & 0xff; | |
707 | return (isalpha(ch) || ch == '_' || ch == '$'); | |
708 | } | |
709 | ||
710 | static void show_line_to_eol(const char *line, int len, const char *reset) | |
711 | { | |
712 | int saw_cr_at_eol = 0; | |
713 | if (len < 0) | |
714 | len = strlen(line); | |
715 | saw_cr_at_eol = (len && line[len-1] == '\r'); | |
716 | ||
717 | printf("%.*s%s%s\n", len - saw_cr_at_eol, line, | |
718 | reset, | |
719 | saw_cr_at_eol ? "\r" : ""); | |
720 | } | |
721 | ||
722 | static void dump_sline(struct sline *sline, const char *line_prefix, | |
723 | unsigned long cnt, int num_parent, | |
724 | int use_color, int result_deleted) | |
725 | { | |
726 | unsigned long mark = (1UL<<num_parent); | |
727 | unsigned long no_pre_delete = (2UL<<num_parent); | |
728 | int i; | |
729 | unsigned long lno = 0; | |
730 | const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO); | |
731 | const char *c_func = diff_get_color(use_color, DIFF_FUNCINFO); | |
732 | const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW); | |
733 | const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD); | |
734 | const char *c_context = diff_get_color(use_color, DIFF_CONTEXT); | |
735 | const char *c_reset = diff_get_color(use_color, DIFF_RESET); | |
736 | ||
737 | if (result_deleted) | |
738 | return; /* result deleted */ | |
739 | ||
740 | while (1) { | |
741 | unsigned long hunk_end; | |
742 | unsigned long rlines; | |
743 | const char *hunk_comment = NULL; | |
744 | unsigned long null_context = 0; | |
745 | ||
746 | while (lno <= cnt && !(sline[lno].flag & mark)) { | |
747 | if (hunk_comment_line(sline[lno].bol)) | |
748 | hunk_comment = sline[lno].bol; | |
749 | lno++; | |
750 | } | |
751 | if (cnt < lno) | |
752 | break; | |
753 | else { | |
754 | for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++) | |
755 | if (!(sline[hunk_end].flag & mark)) | |
756 | break; | |
757 | } | |
758 | rlines = hunk_end - lno; | |
759 | if (cnt < hunk_end) | |
760 | rlines--; /* pointing at the last delete hunk */ | |
761 | ||
762 | if (!context) { | |
763 | /* | |
764 | * Even when running with --unified=0, all | |
765 | * lines in the hunk needs to be processed in | |
766 | * the loop below in order to show the | |
767 | * deletion recorded in lost_head. However, | |
768 | * we do not want to show the resulting line | |
769 | * with all blank context markers in such a | |
770 | * case. Compensate. | |
771 | */ | |
772 | unsigned long j; | |
773 | for (j = lno; j < hunk_end; j++) | |
774 | if (!(sline[j].flag & (mark-1))) | |
775 | null_context++; | |
776 | rlines -= null_context; | |
777 | } | |
778 | ||
779 | printf("%s%s", line_prefix, c_frag); | |
780 | for (i = 0; i <= num_parent; i++) putchar(combine_marker); | |
781 | for (i = 0; i < num_parent; i++) | |
782 | show_parent_lno(sline, lno, hunk_end, i, null_context); | |
783 | printf(" +%lu,%lu ", lno+1, rlines); | |
784 | for (i = 0; i <= num_parent; i++) putchar(combine_marker); | |
785 | ||
786 | if (hunk_comment) { | |
787 | int comment_end = 0; | |
788 | for (i = 0; i < 40; i++) { | |
789 | int ch = hunk_comment[i] & 0xff; | |
790 | if (!ch || ch == '\n') | |
791 | break; | |
792 | if (!isspace(ch)) | |
793 | comment_end = i; | |
794 | } | |
795 | if (comment_end) | |
796 | printf("%s%s %s%s", c_reset, | |
797 | c_context, c_reset, | |
798 | c_func); | |
799 | for (i = 0; i < comment_end; i++) | |
800 | putchar(hunk_comment[i]); | |
801 | } | |
802 | ||
803 | printf("%s\n", c_reset); | |
804 | while (lno < hunk_end) { | |
805 | struct lline *ll; | |
806 | int j; | |
807 | unsigned long p_mask; | |
808 | struct sline *sl = &sline[lno++]; | |
809 | ll = (sl->flag & no_pre_delete) ? NULL : sl->lost; | |
810 | while (ll) { | |
811 | printf("%s%s", line_prefix, c_old); | |
812 | for (j = 0; j < num_parent; j++) { | |
813 | if (ll->parent_map & (1UL<<j)) | |
814 | putchar('-'); | |
815 | else | |
816 | putchar(' '); | |
817 | } | |
818 | show_line_to_eol(ll->line, -1, c_reset); | |
819 | ll = ll->next; | |
820 | } | |
821 | if (cnt < lno) | |
822 | break; | |
823 | p_mask = 1; | |
824 | fputs(line_prefix, stdout); | |
825 | if (!(sl->flag & (mark-1))) { | |
826 | /* | |
827 | * This sline was here to hang the | |
828 | * lost lines in front of it. | |
829 | */ | |
830 | if (!context) | |
831 | continue; | |
832 | fputs(c_context, stdout); | |
833 | } | |
834 | else | |
835 | fputs(c_new, stdout); | |
836 | for (j = 0; j < num_parent; j++) { | |
837 | if (p_mask & sl->flag) | |
838 | putchar('+'); | |
839 | else | |
840 | putchar(' '); | |
841 | p_mask <<= 1; | |
842 | } | |
843 | show_line_to_eol(sl->bol, sl->len, c_reset); | |
844 | } | |
845 | } | |
846 | } | |
847 | ||
848 | static void reuse_combine_diff(struct sline *sline, unsigned long cnt, | |
849 | int i, int j) | |
850 | { | |
851 | /* We have already examined parent j and we know parent i | |
852 | * and parent j are the same, so reuse the combined result | |
853 | * of parent j for parent i. | |
854 | */ | |
855 | unsigned long lno, imask, jmask; | |
856 | imask = (1UL<<i); | |
857 | jmask = (1UL<<j); | |
858 | ||
859 | for (lno = 0; lno <= cnt; lno++) { | |
860 | struct lline *ll = sline->lost; | |
861 | sline->p_lno[i] = sline->p_lno[j]; | |
862 | while (ll) { | |
863 | if (ll->parent_map & jmask) | |
864 | ll->parent_map |= imask; | |
865 | ll = ll->next; | |
866 | } | |
867 | if (sline->flag & jmask) | |
868 | sline->flag |= imask; | |
869 | sline++; | |
870 | } | |
871 | /* the overall size of the file (sline[cnt]) */ | |
872 | sline->p_lno[i] = sline->p_lno[j]; | |
873 | } | |
874 | ||
875 | static void dump_quoted_path(const char *head, | |
876 | const char *prefix, | |
877 | const char *path, | |
878 | const char *line_prefix, | |
879 | const char *c_meta, const char *c_reset) | |
880 | { | |
881 | static struct strbuf buf = STRBUF_INIT; | |
882 | ||
883 | strbuf_reset(&buf); | |
884 | strbuf_addstr(&buf, line_prefix); | |
885 | strbuf_addstr(&buf, c_meta); | |
886 | strbuf_addstr(&buf, head); | |
887 | quote_two_c_style(&buf, prefix, path, 0); | |
888 | strbuf_addstr(&buf, c_reset); | |
889 | puts(buf.buf); | |
890 | } | |
891 | ||
892 | static void show_combined_header(struct combine_diff_path *elem, | |
893 | int num_parent, | |
894 | int dense, | |
895 | struct rev_info *rev, | |
896 | const char *line_prefix, | |
897 | int mode_differs, | |
898 | int show_file_header) | |
899 | { | |
900 | struct diff_options *opt = &rev->diffopt; | |
901 | int abbrev = opt->flags.full_index ? GIT_SHA1_HEXSZ : DEFAULT_ABBREV; | |
902 | const char *a_prefix = opt->a_prefix ? opt->a_prefix : "a/"; | |
903 | const char *b_prefix = opt->b_prefix ? opt->b_prefix : "b/"; | |
904 | const char *c_meta = diff_get_color_opt(opt, DIFF_METAINFO); | |
905 | const char *c_reset = diff_get_color_opt(opt, DIFF_RESET); | |
906 | const char *abb; | |
907 | int added = 0; | |
908 | int deleted = 0; | |
909 | int i; | |
910 | ||
911 | if (rev->loginfo && !rev->no_commit_id) | |
912 | show_log(rev); | |
913 | ||
914 | dump_quoted_path(dense ? "diff --cc " : "diff --combined ", | |
915 | "", elem->path, line_prefix, c_meta, c_reset); | |
916 | printf("%s%sindex ", line_prefix, c_meta); | |
917 | for (i = 0; i < num_parent; i++) { | |
918 | abb = find_unique_abbrev(elem->parent[i].oid.hash, | |
919 | abbrev); | |
920 | printf("%s%s", i ? "," : "", abb); | |
921 | } | |
922 | abb = find_unique_abbrev(elem->oid.hash, abbrev); | |
923 | printf("..%s%s\n", abb, c_reset); | |
924 | ||
925 | if (mode_differs) { | |
926 | deleted = !elem->mode; | |
927 | ||
928 | /* We say it was added if nobody had it */ | |
929 | added = !deleted; | |
930 | for (i = 0; added && i < num_parent; i++) | |
931 | if (elem->parent[i].status != | |
932 | DIFF_STATUS_ADDED) | |
933 | added = 0; | |
934 | if (added) | |
935 | printf("%s%snew file mode %06o", | |
936 | line_prefix, c_meta, elem->mode); | |
937 | else { | |
938 | if (deleted) | |
939 | printf("%s%sdeleted file ", | |
940 | line_prefix, c_meta); | |
941 | printf("mode "); | |
942 | for (i = 0; i < num_parent; i++) { | |
943 | printf("%s%06o", i ? "," : "", | |
944 | elem->parent[i].mode); | |
945 | } | |
946 | if (elem->mode) | |
947 | printf("..%06o", elem->mode); | |
948 | } | |
949 | printf("%s\n", c_reset); | |
950 | } | |
951 | ||
952 | if (!show_file_header) | |
953 | return; | |
954 | ||
955 | if (added) | |
956 | dump_quoted_path("--- ", "", "/dev/null", | |
957 | line_prefix, c_meta, c_reset); | |
958 | else | |
959 | dump_quoted_path("--- ", a_prefix, elem->path, | |
960 | line_prefix, c_meta, c_reset); | |
961 | if (deleted) | |
962 | dump_quoted_path("+++ ", "", "/dev/null", | |
963 | line_prefix, c_meta, c_reset); | |
964 | else | |
965 | dump_quoted_path("+++ ", b_prefix, elem->path, | |
966 | line_prefix, c_meta, c_reset); | |
967 | } | |
968 | ||
969 | static void show_patch_diff(struct combine_diff_path *elem, int num_parent, | |
970 | int dense, int working_tree_file, | |
971 | struct rev_info *rev) | |
972 | { | |
973 | struct diff_options *opt = &rev->diffopt; | |
974 | unsigned long result_size, cnt, lno; | |
975 | int result_deleted = 0; | |
976 | char *result, *cp; | |
977 | struct sline *sline; /* survived lines */ | |
978 | int mode_differs = 0; | |
979 | int i, show_hunks; | |
980 | mmfile_t result_file; | |
981 | struct userdiff_driver *userdiff; | |
982 | struct userdiff_driver *textconv = NULL; | |
983 | int is_binary; | |
984 | const char *line_prefix = diff_line_prefix(opt); | |
985 | ||
986 | context = opt->context; | |
987 | userdiff = userdiff_find_by_path(elem->path); | |
988 | if (!userdiff) | |
989 | userdiff = userdiff_find_by_name("default"); | |
990 | if (opt->flags.allow_textconv) | |
991 | textconv = userdiff_get_textconv(userdiff); | |
992 | ||
993 | /* Read the result of merge first */ | |
994 | if (!working_tree_file) | |
995 | result = grab_blob(&elem->oid, elem->mode, &result_size, | |
996 | textconv, elem->path); | |
997 | else { | |
998 | /* Used by diff-tree to read from the working tree */ | |
999 | struct stat st; | |
1000 | int fd = -1; | |
1001 | ||
1002 | if (lstat(elem->path, &st) < 0) | |
1003 | goto deleted_file; | |
1004 | ||
1005 | if (S_ISLNK(st.st_mode)) { | |
1006 | struct strbuf buf = STRBUF_INIT; | |
1007 | ||
1008 | if (strbuf_readlink(&buf, elem->path, st.st_size) < 0) { | |
1009 | error_errno("readlink(%s)", elem->path); | |
1010 | return; | |
1011 | } | |
1012 | result_size = buf.len; | |
1013 | result = strbuf_detach(&buf, NULL); | |
1014 | elem->mode = canon_mode(st.st_mode); | |
1015 | } else if (S_ISDIR(st.st_mode)) { | |
1016 | struct object_id oid; | |
1017 | if (resolve_gitlink_ref(elem->path, "HEAD", &oid) < 0) | |
1018 | result = grab_blob(&elem->oid, elem->mode, | |
1019 | &result_size, NULL, NULL); | |
1020 | else | |
1021 | result = grab_blob(&oid, elem->mode, | |
1022 | &result_size, NULL, NULL); | |
1023 | } else if (textconv) { | |
1024 | struct diff_filespec *df = alloc_filespec(elem->path); | |
1025 | fill_filespec(df, &null_oid, 0, st.st_mode); | |
1026 | result_size = fill_textconv(textconv, df, &result); | |
1027 | free_filespec(df); | |
1028 | } else if (0 <= (fd = open(elem->path, O_RDONLY))) { | |
1029 | size_t len = xsize_t(st.st_size); | |
1030 | ssize_t done; | |
1031 | int is_file, i; | |
1032 | ||
1033 | elem->mode = canon_mode(st.st_mode); | |
1034 | /* if symlinks don't work, assume symlink if all parents | |
1035 | * are symlinks | |
1036 | */ | |
1037 | is_file = has_symlinks; | |
1038 | for (i = 0; !is_file && i < num_parent; i++) | |
1039 | is_file = !S_ISLNK(elem->parent[i].mode); | |
1040 | if (!is_file) | |
1041 | elem->mode = canon_mode(S_IFLNK); | |
1042 | ||
1043 | result_size = len; | |
1044 | result = xmallocz(len); | |
1045 | ||
1046 | done = read_in_full(fd, result, len); | |
1047 | if (done < 0) | |
1048 | die_errno("read error '%s'", elem->path); | |
1049 | else if (done < len) | |
1050 | die("early EOF '%s'", elem->path); | |
1051 | ||
1052 | /* If not a fake symlink, apply filters, e.g. autocrlf */ | |
1053 | if (is_file) { | |
1054 | struct strbuf buf = STRBUF_INIT; | |
1055 | ||
1056 | if (convert_to_git(&the_index, elem->path, result, len, &buf, safe_crlf)) { | |
1057 | free(result); | |
1058 | result = strbuf_detach(&buf, &len); | |
1059 | result_size = len; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | else { | |
1064 | deleted_file: | |
1065 | result_deleted = 1; | |
1066 | result_size = 0; | |
1067 | elem->mode = 0; | |
1068 | result = xcalloc(1, 1); | |
1069 | } | |
1070 | ||
1071 | if (0 <= fd) | |
1072 | close(fd); | |
1073 | } | |
1074 | ||
1075 | for (i = 0; i < num_parent; i++) { | |
1076 | if (elem->parent[i].mode != elem->mode) { | |
1077 | mode_differs = 1; | |
1078 | break; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | if (textconv) | |
1083 | is_binary = 0; | |
1084 | else if (userdiff->binary != -1) | |
1085 | is_binary = userdiff->binary; | |
1086 | else { | |
1087 | is_binary = buffer_is_binary(result, result_size); | |
1088 | for (i = 0; !is_binary && i < num_parent; i++) { | |
1089 | char *buf; | |
1090 | unsigned long size; | |
1091 | buf = grab_blob(&elem->parent[i].oid, | |
1092 | elem->parent[i].mode, | |
1093 | &size, NULL, NULL); | |
1094 | if (buffer_is_binary(buf, size)) | |
1095 | is_binary = 1; | |
1096 | free(buf); | |
1097 | } | |
1098 | } | |
1099 | if (is_binary) { | |
1100 | show_combined_header(elem, num_parent, dense, rev, | |
1101 | line_prefix, mode_differs, 0); | |
1102 | printf("Binary files differ\n"); | |
1103 | free(result); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | for (cnt = 0, cp = result; cp < result + result_size; cp++) { | |
1108 | if (*cp == '\n') | |
1109 | cnt++; | |
1110 | } | |
1111 | if (result_size && result[result_size-1] != '\n') | |
1112 | cnt++; /* incomplete line */ | |
1113 | ||
1114 | sline = xcalloc(st_add(cnt, 2), sizeof(*sline)); | |
1115 | sline[0].bol = result; | |
1116 | for (lno = 0, cp = result; cp < result + result_size; cp++) { | |
1117 | if (*cp == '\n') { | |
1118 | sline[lno].len = cp - sline[lno].bol; | |
1119 | lno++; | |
1120 | if (lno < cnt) | |
1121 | sline[lno].bol = cp + 1; | |
1122 | } | |
1123 | } | |
1124 | if (result_size && result[result_size-1] != '\n') | |
1125 | sline[cnt-1].len = result_size - (sline[cnt-1].bol - result); | |
1126 | ||
1127 | result_file.ptr = result; | |
1128 | result_file.size = result_size; | |
1129 | ||
1130 | /* Even p_lno[cnt+1] is valid -- that is for the end line number | |
1131 | * for deletion hunk at the end. | |
1132 | */ | |
1133 | sline[0].p_lno = xcalloc(st_mult(st_add(cnt, 2), num_parent), sizeof(unsigned long)); | |
1134 | for (lno = 0; lno <= cnt; lno++) | |
1135 | sline[lno+1].p_lno = sline[lno].p_lno + num_parent; | |
1136 | ||
1137 | for (i = 0; i < num_parent; i++) { | |
1138 | int j; | |
1139 | for (j = 0; j < i; j++) { | |
1140 | if (!oidcmp(&elem->parent[i].oid, | |
1141 | &elem->parent[j].oid)) { | |
1142 | reuse_combine_diff(sline, cnt, i, j); | |
1143 | break; | |
1144 | } | |
1145 | } | |
1146 | if (i <= j) | |
1147 | combine_diff(&elem->parent[i].oid, | |
1148 | elem->parent[i].mode, | |
1149 | &result_file, sline, | |
1150 | cnt, i, num_parent, result_deleted, | |
1151 | textconv, elem->path, opt->xdl_opts); | |
1152 | } | |
1153 | ||
1154 | show_hunks = make_hunks(sline, cnt, num_parent, dense); | |
1155 | ||
1156 | if (show_hunks || mode_differs || working_tree_file) { | |
1157 | show_combined_header(elem, num_parent, dense, rev, | |
1158 | line_prefix, mode_differs, 1); | |
1159 | dump_sline(sline, line_prefix, cnt, num_parent, | |
1160 | opt->use_color, result_deleted); | |
1161 | } | |
1162 | free(result); | |
1163 | ||
1164 | for (lno = 0; lno < cnt; lno++) { | |
1165 | if (sline[lno].lost) { | |
1166 | struct lline *ll = sline[lno].lost; | |
1167 | while (ll) { | |
1168 | struct lline *tmp = ll; | |
1169 | ll = ll->next; | |
1170 | free(tmp); | |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | free(sline[0].p_lno); | |
1175 | free(sline); | |
1176 | } | |
1177 | ||
1178 | static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct rev_info *rev) | |
1179 | { | |
1180 | struct diff_options *opt = &rev->diffopt; | |
1181 | int line_termination, inter_name_termination, i; | |
1182 | const char *line_prefix = diff_line_prefix(opt); | |
1183 | ||
1184 | line_termination = opt->line_termination; | |
1185 | inter_name_termination = '\t'; | |
1186 | if (!line_termination) | |
1187 | inter_name_termination = 0; | |
1188 | ||
1189 | if (rev->loginfo && !rev->no_commit_id) | |
1190 | show_log(rev); | |
1191 | ||
1192 | ||
1193 | if (opt->output_format & DIFF_FORMAT_RAW) { | |
1194 | printf("%s", line_prefix); | |
1195 | ||
1196 | /* As many colons as there are parents */ | |
1197 | for (i = 0; i < num_parent; i++) | |
1198 | putchar(':'); | |
1199 | ||
1200 | /* Show the modes */ | |
1201 | for (i = 0; i < num_parent; i++) | |
1202 | printf("%06o ", p->parent[i].mode); | |
1203 | printf("%06o", p->mode); | |
1204 | ||
1205 | /* Show sha1's */ | |
1206 | for (i = 0; i < num_parent; i++) | |
1207 | printf(" %s", diff_aligned_abbrev(&p->parent[i].oid, | |
1208 | opt->abbrev)); | |
1209 | printf(" %s ", diff_aligned_abbrev(&p->oid, opt->abbrev)); | |
1210 | } | |
1211 | ||
1212 | if (opt->output_format & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) { | |
1213 | for (i = 0; i < num_parent; i++) | |
1214 | putchar(p->parent[i].status); | |
1215 | putchar(inter_name_termination); | |
1216 | } | |
1217 | ||
1218 | write_name_quoted(p->path, stdout, line_termination); | |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * The result (p->elem) is from the working tree and their | |
1223 | * parents are typically from multiple stages during a merge | |
1224 | * (i.e. diff-files) or the state in HEAD and in the index | |
1225 | * (i.e. diff-index). | |
1226 | */ | |
1227 | void show_combined_diff(struct combine_diff_path *p, | |
1228 | int num_parent, | |
1229 | int dense, | |
1230 | struct rev_info *rev) | |
1231 | { | |
1232 | struct diff_options *opt = &rev->diffopt; | |
1233 | ||
1234 | if (opt->output_format & (DIFF_FORMAT_RAW | | |
1235 | DIFF_FORMAT_NAME | | |
1236 | DIFF_FORMAT_NAME_STATUS)) | |
1237 | show_raw_diff(p, num_parent, rev); | |
1238 | else if (opt->output_format & DIFF_FORMAT_PATCH) | |
1239 | show_patch_diff(p, num_parent, dense, 1, rev); | |
1240 | } | |
1241 | ||
1242 | static void free_combined_pair(struct diff_filepair *pair) | |
1243 | { | |
1244 | free(pair->two); | |
1245 | free(pair); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * A combine_diff_path expresses N parents on the LHS against 1 merge | |
1250 | * result. Synthesize a diff_filepair that has N entries on the "one" | |
1251 | * side and 1 entry on the "two" side. | |
1252 | * | |
1253 | * In the future, we might want to add more data to combine_diff_path | |
1254 | * so that we can fill fields we are ignoring (most notably, size) here, | |
1255 | * but currently nobody uses it, so this should suffice for now. | |
1256 | */ | |
1257 | static struct diff_filepair *combined_pair(struct combine_diff_path *p, | |
1258 | int num_parent) | |
1259 | { | |
1260 | int i; | |
1261 | struct diff_filepair *pair; | |
1262 | struct diff_filespec *pool; | |
1263 | ||
1264 | pair = xmalloc(sizeof(*pair)); | |
1265 | pool = xcalloc(st_add(num_parent, 1), sizeof(struct diff_filespec)); | |
1266 | pair->one = pool + 1; | |
1267 | pair->two = pool; | |
1268 | ||
1269 | for (i = 0; i < num_parent; i++) { | |
1270 | pair->one[i].path = p->path; | |
1271 | pair->one[i].mode = p->parent[i].mode; | |
1272 | oidcpy(&pair->one[i].oid, &p->parent[i].oid); | |
1273 | pair->one[i].oid_valid = !is_null_oid(&p->parent[i].oid); | |
1274 | pair->one[i].has_more_entries = 1; | |
1275 | } | |
1276 | pair->one[num_parent - 1].has_more_entries = 0; | |
1277 | ||
1278 | pair->two->path = p->path; | |
1279 | pair->two->mode = p->mode; | |
1280 | oidcpy(&pair->two->oid, &p->oid); | |
1281 | pair->two->oid_valid = !is_null_oid(&p->oid); | |
1282 | return pair; | |
1283 | } | |
1284 | ||
1285 | static void handle_combined_callback(struct diff_options *opt, | |
1286 | struct combine_diff_path *paths, | |
1287 | int num_parent, | |
1288 | int num_paths) | |
1289 | { | |
1290 | struct combine_diff_path *p; | |
1291 | struct diff_queue_struct q; | |
1292 | int i; | |
1293 | ||
1294 | q.queue = xcalloc(num_paths, sizeof(struct diff_filepair *)); | |
1295 | q.alloc = num_paths; | |
1296 | q.nr = num_paths; | |
1297 | for (i = 0, p = paths; p; p = p->next) | |
1298 | q.queue[i++] = combined_pair(p, num_parent); | |
1299 | opt->format_callback(&q, opt, opt->format_callback_data); | |
1300 | for (i = 0; i < num_paths; i++) | |
1301 | free_combined_pair(q.queue[i]); | |
1302 | free(q.queue); | |
1303 | } | |
1304 | ||
1305 | static const char *path_path(void *obj) | |
1306 | { | |
1307 | struct combine_diff_path *path = (struct combine_diff_path *)obj; | |
1308 | ||
1309 | return path->path; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | /* find set of paths that every parent touches */ | |
1314 | static struct combine_diff_path *find_paths_generic(const struct object_id *oid, | |
1315 | const struct oid_array *parents, struct diff_options *opt) | |
1316 | { | |
1317 | struct combine_diff_path *paths = NULL; | |
1318 | int i, num_parent = parents->nr; | |
1319 | ||
1320 | int output_format = opt->output_format; | |
1321 | const char *orderfile = opt->orderfile; | |
1322 | ||
1323 | opt->output_format = DIFF_FORMAT_NO_OUTPUT; | |
1324 | /* tell diff_tree to emit paths in sorted (=tree) order */ | |
1325 | opt->orderfile = NULL; | |
1326 | ||
1327 | /* D(A,P1...Pn) = D(A,P1) ^ ... ^ D(A,Pn) (wrt paths) */ | |
1328 | for (i = 0; i < num_parent; i++) { | |
1329 | /* | |
1330 | * show stat against the first parent even when doing | |
1331 | * combined diff. | |
1332 | */ | |
1333 | int stat_opt = (output_format & | |
1334 | (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT)); | |
1335 | if (i == 0 && stat_opt) | |
1336 | opt->output_format = stat_opt; | |
1337 | else | |
1338 | opt->output_format = DIFF_FORMAT_NO_OUTPUT; | |
1339 | diff_tree_oid(&parents->oid[i], oid, "", opt); | |
1340 | diffcore_std(opt); | |
1341 | paths = intersect_paths(paths, i, num_parent); | |
1342 | ||
1343 | /* if showing diff, show it in requested order */ | |
1344 | if (opt->output_format != DIFF_FORMAT_NO_OUTPUT && | |
1345 | orderfile) { | |
1346 | diffcore_order(orderfile); | |
1347 | } | |
1348 | ||
1349 | diff_flush(opt); | |
1350 | } | |
1351 | ||
1352 | opt->output_format = output_format; | |
1353 | opt->orderfile = orderfile; | |
1354 | return paths; | |
1355 | } | |
1356 | ||
1357 | ||
1358 | /* | |
1359 | * find set of paths that everybody touches, assuming diff is run without | |
1360 | * rename/copy detection, etc, comparing all trees simultaneously (= faster). | |
1361 | */ | |
1362 | static struct combine_diff_path *find_paths_multitree( | |
1363 | const struct object_id *oid, const struct oid_array *parents, | |
1364 | struct diff_options *opt) | |
1365 | { | |
1366 | int i, nparent = parents->nr; | |
1367 | const struct object_id **parents_oid; | |
1368 | struct combine_diff_path paths_head; | |
1369 | struct strbuf base; | |
1370 | ||
1371 | ALLOC_ARRAY(parents_oid, nparent); | |
1372 | for (i = 0; i < nparent; i++) | |
1373 | parents_oid[i] = &parents->oid[i]; | |
1374 | ||
1375 | /* fake list head, so worker can assume it is non-NULL */ | |
1376 | paths_head.next = NULL; | |
1377 | ||
1378 | strbuf_init(&base, PATH_MAX); | |
1379 | diff_tree_paths(&paths_head, oid, parents_oid, nparent, &base, opt); | |
1380 | ||
1381 | strbuf_release(&base); | |
1382 | free(parents_oid); | |
1383 | return paths_head.next; | |
1384 | } | |
1385 | ||
1386 | ||
1387 | void diff_tree_combined(const struct object_id *oid, | |
1388 | const struct oid_array *parents, | |
1389 | int dense, | |
1390 | struct rev_info *rev) | |
1391 | { | |
1392 | struct diff_options *opt = &rev->diffopt; | |
1393 | struct diff_options diffopts; | |
1394 | struct combine_diff_path *p, *paths; | |
1395 | int i, num_paths, needsep, show_log_first, num_parent = parents->nr; | |
1396 | int need_generic_pathscan; | |
1397 | ||
1398 | /* nothing to do, if no parents */ | |
1399 | if (!num_parent) | |
1400 | return; | |
1401 | ||
1402 | show_log_first = !!rev->loginfo && !rev->no_commit_id; | |
1403 | needsep = 0; | |
1404 | if (show_log_first) { | |
1405 | show_log(rev); | |
1406 | ||
1407 | if (rev->verbose_header && opt->output_format && | |
1408 | opt->output_format != DIFF_FORMAT_NO_OUTPUT && | |
1409 | !commit_format_is_empty(rev->commit_format)) | |
1410 | printf("%s%c", diff_line_prefix(opt), | |
1411 | opt->line_termination); | |
1412 | } | |
1413 | ||
1414 | diffopts = *opt; | |
1415 | copy_pathspec(&diffopts.pathspec, &opt->pathspec); | |
1416 | diffopts.flags.recursive = 1; | |
1417 | diffopts.flags.allow_external = 0; | |
1418 | ||
1419 | /* find set of paths that everybody touches | |
1420 | * | |
1421 | * NOTE | |
1422 | * | |
1423 | * Diffcore transformations are bound to diff_filespec and logic | |
1424 | * comparing two entries - i.e. they do not apply directly to combine | |
1425 | * diff. | |
1426 | * | |
1427 | * If some of such transformations is requested - we launch generic | |
1428 | * path scanning, which works significantly slower compared to | |
1429 | * simultaneous all-trees-in-one-go scan in find_paths_multitree(). | |
1430 | * | |
1431 | * TODO some of the filters could be ported to work on | |
1432 | * combine_diff_paths - i.e. all functionality that skips paths, so in | |
1433 | * theory, we could end up having only multitree path scanning. | |
1434 | * | |
1435 | * NOTE please keep this semantically in sync with diffcore_std() | |
1436 | */ | |
1437 | need_generic_pathscan = opt->skip_stat_unmatch || | |
1438 | opt->flags.follow_renames || | |
1439 | opt->break_opt != -1 || | |
1440 | opt->detect_rename || | |
1441 | opt->pickaxe || | |
1442 | opt->filter; | |
1443 | ||
1444 | ||
1445 | if (need_generic_pathscan) { | |
1446 | /* | |
1447 | * NOTE generic case also handles --stat, as it computes | |
1448 | * diff(sha1,parent_i) for all i to do the job, specifically | |
1449 | * for parent0. | |
1450 | */ | |
1451 | paths = find_paths_generic(oid, parents, &diffopts); | |
1452 | } | |
1453 | else { | |
1454 | int stat_opt; | |
1455 | paths = find_paths_multitree(oid, parents, &diffopts); | |
1456 | ||
1457 | /* | |
1458 | * show stat against the first parent even | |
1459 | * when doing combined diff. | |
1460 | */ | |
1461 | stat_opt = (opt->output_format & | |
1462 | (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT)); | |
1463 | if (stat_opt) { | |
1464 | diffopts.output_format = stat_opt; | |
1465 | ||
1466 | diff_tree_oid(&parents->oid[0], oid, "", &diffopts); | |
1467 | diffcore_std(&diffopts); | |
1468 | if (opt->orderfile) | |
1469 | diffcore_order(opt->orderfile); | |
1470 | diff_flush(&diffopts); | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | /* find out number of surviving paths */ | |
1475 | for (num_paths = 0, p = paths; p; p = p->next) | |
1476 | num_paths++; | |
1477 | ||
1478 | /* order paths according to diffcore_order */ | |
1479 | if (opt->orderfile && num_paths) { | |
1480 | struct obj_order *o; | |
1481 | ||
1482 | ALLOC_ARRAY(o, num_paths); | |
1483 | for (i = 0, p = paths; p; p = p->next, i++) | |
1484 | o[i].obj = p; | |
1485 | order_objects(opt->orderfile, path_path, o, num_paths); | |
1486 | for (i = 0; i < num_paths - 1; i++) { | |
1487 | p = o[i].obj; | |
1488 | p->next = o[i+1].obj; | |
1489 | } | |
1490 | ||
1491 | p = o[num_paths-1].obj; | |
1492 | p->next = NULL; | |
1493 | paths = o[0].obj; | |
1494 | free(o); | |
1495 | } | |
1496 | ||
1497 | ||
1498 | if (num_paths) { | |
1499 | if (opt->output_format & (DIFF_FORMAT_RAW | | |
1500 | DIFF_FORMAT_NAME | | |
1501 | DIFF_FORMAT_NAME_STATUS)) { | |
1502 | for (p = paths; p; p = p->next) | |
1503 | show_raw_diff(p, num_parent, rev); | |
1504 | needsep = 1; | |
1505 | } | |
1506 | else if (opt->output_format & | |
1507 | (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT)) | |
1508 | needsep = 1; | |
1509 | else if (opt->output_format & DIFF_FORMAT_CALLBACK) | |
1510 | handle_combined_callback(opt, paths, num_parent, num_paths); | |
1511 | ||
1512 | if (opt->output_format & DIFF_FORMAT_PATCH) { | |
1513 | if (needsep) | |
1514 | printf("%s%c", diff_line_prefix(opt), | |
1515 | opt->line_termination); | |
1516 | for (p = paths; p; p = p->next) | |
1517 | show_patch_diff(p, num_parent, dense, | |
1518 | 0, rev); | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | /* Clean things up */ | |
1523 | while (paths) { | |
1524 | struct combine_diff_path *tmp = paths; | |
1525 | paths = paths->next; | |
1526 | free(tmp); | |
1527 | } | |
1528 | ||
1529 | clear_pathspec(&diffopts.pathspec); | |
1530 | } | |
1531 | ||
1532 | void diff_tree_combined_merge(const struct commit *commit, int dense, | |
1533 | struct rev_info *rev) | |
1534 | { | |
1535 | struct commit_list *parent = get_saved_parents(rev, commit); | |
1536 | struct oid_array parents = OID_ARRAY_INIT; | |
1537 | ||
1538 | while (parent) { | |
1539 | oid_array_append(&parents, &parent->item->object.oid); | |
1540 | parent = parent->next; | |
1541 | } | |
1542 | diff_tree_combined(&commit->object.oid, &parents, dense, rev); | |
1543 | oid_array_clear(&parents); | |
1544 | } |