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Commit | Line | Data |
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af3feefa JH |
1 | #include "cache.h" |
2 | #include "commit.h" | |
3 | #include "diff.h" | |
4 | #include "diffcore.h" | |
5 | #include "quote.h" | |
6 | ||
af3feefa JH |
7 | static int uninteresting(struct diff_filepair *p) |
8 | { | |
9 | if (diff_unmodified_pair(p)) | |
10 | return 1; | |
11 | if (!S_ISREG(p->one->mode) || !S_ISREG(p->two->mode)) | |
12 | return 1; | |
13 | return 0; | |
14 | } | |
15 | ||
ea726d02 | 16 | static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent) |
af3feefa JH |
17 | { |
18 | struct diff_queue_struct *q = &diff_queued_diff; | |
ea726d02 | 19 | struct combine_diff_path *p; |
af3feefa JH |
20 | int i; |
21 | ||
22 | if (!n) { | |
ea726d02 | 23 | struct combine_diff_path *list = NULL, **tail = &list; |
af3feefa JH |
24 | for (i = 0; i < q->nr; i++) { |
25 | int len; | |
26 | const char *path; | |
27 | if (uninteresting(q->queue[i])) | |
28 | continue; | |
29 | path = q->queue[i]->two->path; | |
30 | len = strlen(path); | |
31 | ||
32 | p = xmalloc(sizeof(*p) + len + 1 + num_parent * 20); | |
33 | p->path = (char*) &(p->parent_sha1[num_parent][0]); | |
34 | memcpy(p->path, path, len); | |
35 | p->path[len] = 0; | |
36 | p->len = len; | |
37 | p->next = NULL; | |
38 | memcpy(p->sha1, q->queue[i]->two->sha1, 20); | |
39 | memcpy(p->parent_sha1[n], q->queue[i]->one->sha1, 20); | |
5290a0f8 JH |
40 | *tail = p; |
41 | tail = &p->next; | |
af3feefa JH |
42 | } |
43 | return list; | |
44 | } | |
45 | ||
46 | for (p = curr; p; p = p->next) { | |
47 | int found = 0; | |
48 | if (!p->len) | |
49 | continue; | |
50 | for (i = 0; i < q->nr; i++) { | |
51 | const char *path; | |
52 | int len; | |
53 | ||
54 | if (uninteresting(q->queue[i])) | |
55 | continue; | |
56 | path = q->queue[i]->two->path; | |
57 | len = strlen(path); | |
58 | if (len == p->len && !memcmp(path, p->path, len)) { | |
59 | found = 1; | |
60 | memcpy(p->parent_sha1[n], | |
61 | q->queue[i]->one->sha1, 20); | |
62 | break; | |
63 | } | |
64 | } | |
65 | if (!found) | |
66 | p->len = 0; | |
67 | } | |
68 | return curr; | |
69 | } | |
70 | ||
71 | struct lline { | |
72 | struct lline *next; | |
73 | int len; | |
74 | unsigned long parent_map; | |
75 | char line[FLEX_ARRAY]; | |
76 | }; | |
77 | ||
78 | struct sline { | |
79 | struct lline *lost_head, **lost_tail; | |
80 | char *bol; | |
81 | int len; | |
82 | unsigned long flag; | |
83 | }; | |
84 | ||
85 | static char *grab_blob(const unsigned char *sha1, unsigned long *size) | |
86 | { | |
87 | char *blob; | |
88 | char type[20]; | |
89 | if (!memcmp(sha1, null_sha1, 20)) { | |
90 | /* deleted blob */ | |
91 | *size = 0; | |
92 | return xcalloc(1, 1); | |
93 | } | |
94 | blob = read_sha1_file(sha1, type, size); | |
95 | if (strcmp(type, "blob")) | |
96 | die("object '%s' is not a blob!", sha1_to_hex(sha1)); | |
97 | return blob; | |
98 | } | |
99 | ||
100 | #define TMPPATHLEN 50 | |
101 | #define MAXLINELEN 10240 | |
102 | ||
103 | static void write_to_temp_file(char *tmpfile, void *blob, unsigned long size) | |
104 | { | |
105 | int fd = git_mkstemp(tmpfile, TMPPATHLEN, ".diff_XXXXXX"); | |
106 | if (fd < 0) | |
107 | die("unable to create temp-file"); | |
108 | if (write(fd, blob, size) != size) | |
109 | die("unable to write temp-file"); | |
110 | close(fd); | |
111 | } | |
112 | ||
113 | static void write_temp_blob(char *tmpfile, const unsigned char *sha1) | |
114 | { | |
115 | unsigned long size; | |
116 | void *blob; | |
117 | blob = grab_blob(sha1, &size); | |
118 | write_to_temp_file(tmpfile, blob, size); | |
119 | free(blob); | |
120 | } | |
121 | ||
122 | static int parse_num(char **cp_p, unsigned int *num_p) | |
123 | { | |
124 | char *cp = *cp_p; | |
125 | unsigned int num = 0; | |
126 | int read_some; | |
127 | ||
128 | while ('0' <= *cp && *cp <= '9') | |
129 | num = num * 10 + *cp++ - '0'; | |
130 | if (!(read_some = cp - *cp_p)) | |
131 | return -1; | |
132 | *cp_p = cp; | |
133 | *num_p = num; | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static int parse_hunk_header(char *line, int len, | |
138 | unsigned int *ob, unsigned int *on, | |
139 | unsigned int *nb, unsigned int *nn) | |
140 | { | |
141 | char *cp; | |
142 | cp = line + 4; | |
143 | if (parse_num(&cp, ob)) { | |
144 | bad_line: | |
145 | return error("malformed diff output: %s", line); | |
146 | } | |
147 | if (*cp == ',') { | |
148 | cp++; | |
149 | if (parse_num(&cp, on)) | |
150 | goto bad_line; | |
151 | } | |
152 | else | |
153 | *on = 1; | |
154 | if (*cp++ != ' ' || *cp++ != '+') | |
155 | goto bad_line; | |
156 | if (parse_num(&cp, nb)) | |
157 | goto bad_line; | |
158 | if (*cp == ',') { | |
159 | cp++; | |
160 | if (parse_num(&cp, nn)) | |
161 | goto bad_line; | |
162 | } | |
163 | else | |
164 | *nn = 1; | |
165 | return -!!memcmp(cp, " @@", 3); | |
166 | } | |
167 | ||
168 | static void append_lost(struct sline *sline, int n, const char *line) | |
169 | { | |
170 | struct lline *lline; | |
171 | int len = strlen(line); | |
172 | unsigned long this_mask = (1UL<<n); | |
173 | if (line[len-1] == '\n') | |
174 | len--; | |
175 | ||
176 | /* Check to see if we can squash things */ | |
177 | if (sline->lost_head) { | |
178 | struct lline *last_one = NULL; | |
179 | /* We cannot squash it with earlier one */ | |
180 | for (lline = sline->lost_head; | |
181 | lline; | |
182 | lline = lline->next) | |
183 | if (lline->parent_map & this_mask) | |
184 | last_one = lline; | |
185 | lline = last_one ? last_one->next : sline->lost_head; | |
186 | while (lline) { | |
187 | if (lline->len == len && | |
188 | !memcmp(lline->line, line, len)) { | |
189 | lline->parent_map |= this_mask; | |
190 | return; | |
191 | } | |
192 | lline = lline->next; | |
193 | } | |
194 | } | |
195 | ||
196 | lline = xmalloc(sizeof(*lline) + len + 1); | |
197 | lline->len = len; | |
198 | lline->next = NULL; | |
199 | lline->parent_map = this_mask; | |
200 | memcpy(lline->line, line, len); | |
201 | lline->line[len] = 0; | |
5290a0f8 | 202 | *sline->lost_tail = lline; |
af3feefa JH |
203 | sline->lost_tail = &lline->next; |
204 | } | |
205 | ||
206 | static void combine_diff(const unsigned char *parent, const char *ourtmp, | |
207 | struct sline *sline, int cnt, int n) | |
208 | { | |
209 | FILE *in; | |
210 | char parent_tmp[TMPPATHLEN]; | |
211 | char cmd[TMPPATHLEN * 2 + 1024]; | |
212 | char line[MAXLINELEN]; | |
213 | unsigned int lno, ob, on, nb, nn; | |
214 | unsigned long pmask = ~(1UL << n); | |
215 | struct sline *lost_bucket = NULL; | |
216 | ||
217 | write_temp_blob(parent_tmp, parent); | |
218 | sprintf(cmd, "diff --unified=0 -La/x -Lb/x '%s' '%s'", | |
219 | parent_tmp, ourtmp); | |
220 | in = popen(cmd, "r"); | |
221 | if (!in) | |
222 | return; | |
223 | ||
224 | lno = 1; | |
225 | while (fgets(line, sizeof(line), in) != NULL) { | |
226 | int len = strlen(line); | |
227 | if (5 < len && !memcmp("@@ -", line, 4)) { | |
228 | if (parse_hunk_header(line, len, | |
229 | &ob, &on, &nb, &nn)) | |
230 | break; | |
231 | lno = nb; | |
232 | if (!nb) { | |
233 | /* @@ -1,2 +0,0 @@ to remove the | |
234 | * first two lines... | |
235 | */ | |
236 | nb = 1; | |
237 | } | |
238 | lost_bucket = &sline[nb-1]; /* sline is 0 based */ | |
239 | continue; | |
240 | } | |
241 | if (!lost_bucket) | |
242 | continue; | |
243 | switch (line[0]) { | |
244 | case '-': | |
245 | append_lost(lost_bucket, n, line+1); | |
246 | break; | |
247 | case '+': | |
248 | sline[lno-1].flag &= pmask; | |
249 | lno++; | |
250 | break; | |
251 | } | |
252 | } | |
253 | fclose(in); | |
254 | unlink(parent_tmp); | |
255 | } | |
256 | ||
257 | static unsigned long context = 3; | |
258 | static char combine_marker = '@'; | |
259 | ||
260 | static int interesting(struct sline *sline, unsigned long all_mask) | |
261 | { | |
262 | return ((sline->flag & all_mask) != all_mask || sline->lost_head); | |
263 | } | |
264 | ||
263eee29 | 265 | static unsigned long line_common_diff(struct sline *sline, unsigned long all_mask) |
d8f4790e JH |
266 | { |
267 | /* | |
263eee29 JH |
268 | * Look at the line and see from which parents we have the |
269 | * same difference. | |
d8f4790e | 270 | */ |
263eee29 JH |
271 | |
272 | /* Lower bits of sline->flag records if the parent had this | |
273 | * line, so XOR with all_mask gives us on-bits for parents we | |
274 | * have differences with. | |
275 | */ | |
276 | unsigned long common_adds = (sline->flag ^ all_mask) & all_mask; | |
277 | unsigned long common_removes = all_mask; | |
278 | ||
279 | /* If all the parents have this line, that also counts as | |
280 | * having the same difference. | |
281 | */ | |
282 | if (!common_adds) | |
283 | common_adds = all_mask; | |
284 | ||
285 | if (sline->lost_head) { | |
286 | /* Lost head list records the lines removed from | |
287 | * the parents, and parent_map records from which | |
288 | * parent the line was removed. | |
289 | */ | |
290 | struct lline *ll; | |
291 | for (ll = sline->lost_head; ll; ll = ll->next) { | |
292 | common_removes &= ll->parent_map; | |
293 | } | |
294 | } | |
295 | return common_adds & common_removes; | |
296 | } | |
297 | ||
298 | static unsigned long line_all_diff(struct sline *sline, unsigned long all_mask) | |
299 | { | |
300 | /* | |
301 | * Look at the line and see from which parents we have some difference. | |
302 | */ | |
303 | unsigned long different = (sline->flag ^ all_mask) & all_mask; | |
d8f4790e | 304 | if (sline->lost_head) { |
263eee29 JH |
305 | /* Lost head list records the lines removed from |
306 | * the parents, and parent_map records from which | |
307 | * parent the line was removed. | |
308 | */ | |
d8f4790e | 309 | struct lline *ll; |
263eee29 JH |
310 | for (ll = sline->lost_head; ll; ll = ll->next) { |
311 | different |= ll->parent_map; | |
312 | } | |
d8f4790e | 313 | } |
263eee29 | 314 | return different; |
d8f4790e JH |
315 | } |
316 | ||
3ec1909f JH |
317 | static unsigned long adjust_hunk_tail(struct sline *sline, |
318 | unsigned long all_mask, | |
319 | unsigned long hunk_begin, | |
320 | unsigned long i) | |
321 | { | |
322 | /* i points at the first uninteresting line. | |
323 | * If the last line of the hunk was interesting | |
324 | * only because it has some deletion, then | |
325 | * it is not all that interesting for the | |
326 | * purpose of giving trailing context lines. | |
327 | */ | |
328 | if ((hunk_begin + 1 <= i) && | |
329 | ((sline[i-1].flag & all_mask) == all_mask)) | |
330 | i--; | |
331 | return i; | |
332 | } | |
333 | ||
334 | static unsigned long next_interesting(struct sline *sline, | |
335 | unsigned long mark, | |
336 | unsigned long i, | |
337 | unsigned long cnt, | |
338 | int uninteresting) | |
339 | { | |
340 | while (i < cnt) | |
341 | if (uninteresting ? | |
342 | !(sline[i].flag & mark) : | |
343 | (sline[i].flag & mark)) | |
344 | return i; | |
345 | else | |
346 | i++; | |
347 | return cnt; | |
348 | } | |
349 | ||
350 | static int give_context(struct sline *sline, unsigned long cnt, int num_parent) | |
af3feefa JH |
351 | { |
352 | unsigned long all_mask = (1UL<<num_parent) - 1; | |
353 | unsigned long mark = (1UL<<num_parent); | |
354 | unsigned long i; | |
355 | ||
3ec1909f JH |
356 | i = next_interesting(sline, mark, 0, cnt, 0); |
357 | if (cnt <= i) | |
358 | return 0; | |
359 | ||
af3feefa | 360 | while (i < cnt) { |
3ec1909f JH |
361 | unsigned long j = (context < i) ? (i - context) : 0; |
362 | unsigned long k; | |
363 | while (j < i) | |
364 | sline[j++].flag |= mark; | |
365 | ||
366 | again: | |
367 | j = next_interesting(sline, mark, i, cnt, 1); | |
368 | if (cnt <= j) | |
369 | break; /* the rest are all interesting */ | |
370 | ||
371 | /* lookahead context lines */ | |
372 | k = next_interesting(sline, mark, j, cnt, 0); | |
373 | j = adjust_hunk_tail(sline, all_mask, i, j); | |
374 | ||
375 | if (k < j + context) { | |
376 | /* k is interesting and [j,k) are not, but | |
377 | * paint them interesting because the gap is small. | |
378 | */ | |
379 | while (j < k) | |
af3feefa | 380 | sline[j++].flag |= mark; |
3ec1909f JH |
381 | i = k; |
382 | goto again; | |
af3feefa | 383 | } |
3ec1909f JH |
384 | |
385 | /* j is the first uninteresting line and there is | |
386 | * no overlap beyond it within context lines. | |
387 | */ | |
388 | i = k; | |
389 | k = (j + context < cnt) ? j + context : cnt; | |
390 | while (j < k) | |
391 | sline[j++].flag |= mark; | |
392 | } | |
393 | return 1; | |
394 | } | |
395 | ||
396 | static int make_hunks(struct sline *sline, unsigned long cnt, | |
397 | int num_parent, int dense) | |
398 | { | |
399 | unsigned long all_mask = (1UL<<num_parent) - 1; | |
400 | unsigned long mark = (1UL<<num_parent); | |
401 | unsigned long i; | |
402 | int has_interesting = 0; | |
403 | ||
404 | for (i = 0; i < cnt; i++) { | |
405 | if (interesting(&sline[i], all_mask)) | |
406 | sline[i].flag |= mark; | |
407 | else | |
408 | sline[i].flag &= ~mark; | |
af3feefa | 409 | } |
d8f4790e | 410 | if (!dense) |
3ec1909f | 411 | return give_context(sline, cnt, num_parent); |
d8f4790e | 412 | |
263eee29 JH |
413 | /* Look at each hunk, and if we have changes from only one |
414 | * parent, or the changes are the same from all but one | |
415 | * parent, mark that uninteresting. | |
d8f4790e JH |
416 | */ |
417 | i = 0; | |
418 | while (i < cnt) { | |
3ec1909f JH |
419 | unsigned long j, hunk_begin, hunk_end; |
420 | int same, diff; | |
8828cdcb | 421 | unsigned long same_diff, all_diff; |
d8f4790e JH |
422 | while (i < cnt && !(sline[i].flag & mark)) |
423 | i++; | |
424 | if (cnt <= i) | |
425 | break; /* No more interesting hunks */ | |
3ec1909f JH |
426 | hunk_begin = i; |
427 | for (j = i + 1; j < cnt; j++) { | |
428 | if (!(sline[j].flag & mark)) { | |
429 | /* Look beyond the end to see if there | |
430 | * is an interesting line after this | |
431 | * hunk within context span. | |
432 | */ | |
433 | unsigned long la; /* lookahead */ | |
434 | int contin = 0; | |
435 | la = adjust_hunk_tail(sline, all_mask, | |
436 | hunk_begin, j); | |
437 | la = (la + context < cnt) ? | |
438 | (la + context) : cnt; | |
439 | while (j <= --la) { | |
440 | if (sline[la].flag & mark) { | |
441 | contin = 1; | |
442 | break; | |
443 | } | |
444 | } | |
445 | if (!contin) | |
446 | break; | |
447 | j = la; | |
448 | } | |
449 | } | |
450 | hunk_end = j; | |
451 | ||
263eee29 JH |
452 | /* [i..hunk_end) are interesting. Now does it have |
453 | * the same change with all but one parent? | |
d8f4790e | 454 | */ |
263eee29 JH |
455 | same_diff = all_mask; |
456 | all_diff = 0; | |
457 | for (j = i; j < hunk_end; j++) { | |
458 | same_diff &= line_common_diff(sline + j, all_mask); | |
459 | all_diff |= line_all_diff(sline + j, all_mask); | |
460 | } | |
461 | diff = same = 0; | |
d8f4790e | 462 | for (j = 0; j < num_parent; j++) { |
263eee29 JH |
463 | if (same_diff & (1UL<<j)) |
464 | same++; | |
465 | if (all_diff & (1UL<<j)) | |
466 | diff++; | |
d8f4790e | 467 | } |
263eee29 | 468 | if ((num_parent - 1 <= same) || (diff == 1)) { |
d8f4790e | 469 | /* This hunk is not that interesting after all */ |
3ec1909f | 470 | for (j = hunk_begin; j < hunk_end; j++) |
d8f4790e JH |
471 | sline[j].flag &= ~mark; |
472 | } | |
473 | i = hunk_end; | |
474 | } | |
3ec1909f JH |
475 | |
476 | has_interesting = give_context(sline, cnt, num_parent); | |
8828cdcb | 477 | return has_interesting; |
af3feefa JH |
478 | } |
479 | ||
480 | static void dump_sline(struct sline *sline, int cnt, int num_parent) | |
481 | { | |
482 | unsigned long mark = (1UL<<num_parent); | |
483 | int i; | |
484 | int lno = 0; | |
485 | ||
486 | while (1) { | |
487 | struct sline *sl = &sline[lno]; | |
488 | int hunk_end; | |
489 | while (lno < cnt && !(sline[lno].flag & mark)) | |
490 | lno++; | |
491 | if (cnt <= lno) | |
492 | break; | |
493 | for (hunk_end = lno + 1; hunk_end < cnt; hunk_end++) | |
494 | if (!(sline[hunk_end].flag & mark)) | |
495 | break; | |
496 | for (i = 0; i <= num_parent; i++) putchar(combine_marker); | |
497 | printf(" +%d,%d ", lno+1, hunk_end-lno); | |
498 | for (i = 0; i <= num_parent; i++) putchar(combine_marker); | |
499 | putchar('\n'); | |
500 | while (lno < hunk_end) { | |
501 | struct lline *ll; | |
502 | int j; | |
503 | sl = &sline[lno++]; | |
504 | ll = sl->lost_head; | |
505 | while (ll) { | |
506 | for (j = 0; j < num_parent; j++) { | |
507 | if (ll->parent_map & (1UL<<j)) | |
508 | putchar('-'); | |
509 | else | |
510 | putchar(' '); | |
511 | } | |
af3feefa JH |
512 | puts(ll->line); |
513 | ll = ll->next; | |
514 | } | |
515 | for (j = 0; j < num_parent; j++) { | |
516 | if ((1UL<<j) & sl->flag) | |
517 | putchar(' '); | |
518 | else | |
519 | putchar('+'); | |
520 | } | |
e2283409 | 521 | printf("%.*s\n", sl->len, sl->bol); |
af3feefa JH |
522 | } |
523 | } | |
524 | } | |
525 | ||
3c39e9bd JH |
526 | static void reuse_combine_diff(struct sline *sline, unsigned long cnt, |
527 | int i, int j) | |
528 | { | |
529 | /* We have already examined parent j and we know parent i | |
530 | * and parent j are the same, so reuse the combined result | |
531 | * of parent j for parent i. | |
532 | */ | |
533 | unsigned long lno, imask, jmask; | |
534 | imask = (1UL<<i); | |
535 | jmask = (1UL<<j); | |
536 | ||
537 | for (lno = 0; lno < cnt; lno++) { | |
538 | struct lline *ll = sline->lost_head; | |
539 | while (ll) { | |
540 | if (ll->parent_map & jmask) | |
541 | ll->parent_map |= imask; | |
542 | ll = ll->next; | |
543 | } | |
544 | if (!(sline->flag & jmask)) | |
545 | sline->flag &= ~imask; | |
546 | sline++; | |
547 | } | |
548 | } | |
549 | ||
ea726d02 JH |
550 | int show_combined_diff(struct combine_diff_path *elem, int num_parent, |
551 | int dense, const char *header, int show_empty) | |
af3feefa JH |
552 | { |
553 | unsigned long size, cnt, lno; | |
554 | char *result, *cp, *ep; | |
555 | struct sline *sline; /* survived lines */ | |
8828cdcb | 556 | int i, show_hunks, shown_header = 0; |
ea726d02 JH |
557 | char ourtmp_buf[TMPPATHLEN]; |
558 | char *ourtmp = ourtmp_buf; | |
af3feefa JH |
559 | |
560 | /* Read the result of merge first */ | |
ea726d02 JH |
561 | if (memcmp(elem->sha1, null_sha1, 20)) { |
562 | result = grab_blob(elem->sha1, &size); | |
563 | write_to_temp_file(ourtmp, result, size); | |
564 | } | |
565 | else { | |
566 | struct stat st; | |
567 | int fd; | |
568 | ourtmp = elem->path; | |
569 | if (0 <= (fd = open(ourtmp, O_RDONLY)) && | |
570 | !fstat(fd, &st)) { | |
571 | int len = st.st_size; | |
572 | int cnt = 0; | |
573 | ||
574 | size = len; | |
575 | result = xmalloc(len + 1); | |
576 | while (cnt < len) { | |
577 | int done = xread(fd, result+cnt, len-cnt); | |
578 | if (done == 0) | |
579 | break; | |
580 | if (done < 0) | |
581 | die("read error '%s'", ourtmp); | |
582 | cnt += done; | |
583 | } | |
584 | result[len] = 0; | |
585 | } | |
586 | else { | |
587 | /* deleted file */ | |
588 | size = 0; | |
589 | result = xmalloc(1); | |
590 | result[0] = 0; | |
591 | ourtmp = "/dev/null"; | |
592 | } | |
593 | if (0 <= fd) | |
594 | close(fd); | |
595 | } | |
af3feefa JH |
596 | |
597 | for (cnt = 0, cp = result; cp - result < size; cp++) { | |
598 | if (*cp == '\n') | |
599 | cnt++; | |
600 | } | |
601 | if (result[size-1] != '\n') | |
602 | cnt++; /* incomplete line */ | |
603 | ||
604 | sline = xcalloc(cnt, sizeof(*sline)); | |
605 | ep = result; | |
606 | sline[0].bol = result; | |
607 | for (lno = 0, cp = result; cp - result < size; cp++) { | |
608 | if (*cp == '\n') { | |
5290a0f8 | 609 | sline[lno].lost_tail = &sline[lno].lost_head; |
af3feefa JH |
610 | sline[lno].len = cp - sline[lno].bol; |
611 | sline[lno].flag = (1UL<<num_parent) - 1; | |
612 | lno++; | |
613 | if (lno < cnt) | |
614 | sline[lno].bol = cp + 1; | |
615 | } | |
616 | } | |
617 | if (result[size-1] != '\n') { | |
5290a0f8 | 618 | sline[cnt-1].lost_tail = &sline[cnt-1].lost_head; |
af3feefa JH |
619 | sline[cnt-1].len = size - (sline[cnt-1].bol - result); |
620 | sline[cnt-1].flag = (1UL<<num_parent) - 1; | |
621 | } | |
622 | ||
3c39e9bd JH |
623 | for (i = 0; i < num_parent; i++) { |
624 | int j; | |
625 | for (j = 0; j < i; j++) { | |
626 | if (!memcmp(elem->parent_sha1[i], | |
627 | elem->parent_sha1[j], 20)) { | |
628 | reuse_combine_diff(sline, cnt, i, j); | |
629 | break; | |
630 | } | |
631 | } | |
632 | if (i <= j) | |
633 | combine_diff(elem->parent_sha1[i], ourtmp, sline, | |
634 | cnt, i); | |
635 | } | |
af3feefa | 636 | |
8828cdcb | 637 | show_hunks = make_hunks(sline, cnt, num_parent, dense); |
af3feefa | 638 | |
8828cdcb JH |
639 | if (header && (show_hunks || show_empty)) { |
640 | shown_header++; | |
641 | puts(header); | |
642 | } | |
643 | if (show_hunks) { | |
644 | printf("diff --%s ", dense ? "cc" : "combined"); | |
645 | if (quote_c_style(elem->path, NULL, NULL, 0)) | |
646 | quote_c_style(elem->path, NULL, stdout, 0); | |
647 | else | |
648 | printf("%s", elem->path); | |
649 | putchar('\n'); | |
650 | dump_sline(sline, cnt, num_parent); | |
651 | } | |
ea726d02 JH |
652 | if (ourtmp == ourtmp_buf) |
653 | unlink(ourtmp); | |
af3feefa JH |
654 | free(result); |
655 | ||
656 | for (i = 0; i < cnt; i++) { | |
657 | if (sline[i].lost_head) { | |
658 | struct lline *ll = sline[i].lost_head; | |
659 | while (ll) { | |
660 | struct lline *tmp = ll; | |
661 | ll = ll->next; | |
662 | free(tmp); | |
663 | } | |
664 | } | |
665 | } | |
666 | free(sline); | |
8828cdcb | 667 | return shown_header; |
af3feefa JH |
668 | } |
669 | ||
670 | int diff_tree_combined_merge(const unsigned char *sha1, | |
d8f4790e JH |
671 | const char *header, |
672 | int show_empty_merge, int dense) | |
af3feefa JH |
673 | { |
674 | struct commit *commit = lookup_commit(sha1); | |
675 | struct diff_options diffopts; | |
676 | struct commit_list *parents; | |
ea726d02 | 677 | struct combine_diff_path *p, *paths = NULL; |
af3feefa JH |
678 | int num_parent, i, num_paths; |
679 | ||
680 | diff_setup(&diffopts); | |
681 | diffopts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
682 | diffopts.recursive = 1; | |
683 | ||
684 | /* count parents */ | |
685 | for (parents = commit->parents, num_parent = 0; | |
686 | parents; | |
687 | parents = parents->next, num_parent++) | |
688 | ; /* nothing */ | |
689 | ||
690 | /* find set of paths that everybody touches */ | |
691 | for (parents = commit->parents, i = 0; | |
692 | parents; | |
693 | parents = parents->next, i++) { | |
694 | struct commit *parent = parents->item; | |
695 | diff_tree_sha1(parent->object.sha1, commit->object.sha1, "", | |
696 | &diffopts); | |
697 | paths = intersect_paths(paths, i, num_parent); | |
698 | diff_flush(&diffopts); | |
699 | } | |
700 | ||
701 | /* find out surviving paths */ | |
702 | for (num_paths = 0, p = paths; p; p = p->next) { | |
703 | if (p->len) | |
704 | num_paths++; | |
705 | } | |
706 | if (num_paths || show_empty_merge) { | |
af3feefa JH |
707 | for (p = paths; p; p = p->next) { |
708 | if (!p->len) | |
709 | continue; | |
8828cdcb JH |
710 | if (show_combined_diff(p, num_parent, dense, header, |
711 | show_empty_merge)) | |
712 | header = NULL; | |
af3feefa JH |
713 | } |
714 | } | |
715 | ||
716 | /* Clean things up */ | |
717 | while (paths) { | |
ea726d02 | 718 | struct combine_diff_path *tmp = paths; |
af3feefa JH |
719 | paths = paths->next; |
720 | free(tmp); | |
721 | } | |
722 | return 0; | |
723 | } |