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 "log-tree.h"
9static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent)
11{
12 struct diff_queue_struct *q = &diff_queued_diff;
13 struct combine_diff_path *p;
14 int i;
15 if (!n) {
17 struct combine_diff_path *list = NULL, **tail = &list;
18 for (i = 0; i < q->nr; i++) {
19 int len;
20 const char *path;
21 if (diff_unmodified_pair(q->queue[i]))
22 continue;
23 path = q->queue[i]->two->path;
24 len = strlen(path);
25 p = xmalloc(combine_diff_path_size(num_parent, len));
26 p->path = (char*) &(p->parent[num_parent]);
27 memcpy(p->path, path, len);
28 p->path[len] = 0;
29 p->len = len;
30 p->next = NULL;
31 memset(p->parent, 0,
32 sizeof(p->parent[0]) * num_parent);
33 memcpy(p->sha1, q->queue[i]->two->sha1, 20);
35 p->mode = q->queue[i]->two->mode;
36 memcpy(p->parent[n].sha1, q->queue[i]->one->sha1, 20);
37 p->parent[n].mode = q->queue[i]->one->mode;
38 p->parent[n].status = q->queue[i]->status;
39 *tail = p;
40 tail = &p->next;
41 }
42 return list;
43 }
44 for (p = curr; p; p = p->next) {
46 int found = 0;
47 if (!p->len)
48 continue;
49 for (i = 0; i < q->nr; i++) {
50 const char *path;
51 int len;
52 if (diff_unmodified_pair(q->queue[i]))
54 continue;
55 path = q->queue[i]->two->path;
56 len = strlen(path);
57 if (len == p->len && !memcmp(path, p->path, len)) {
58 found = 1;
59 memcpy(p->parent[n].sha1,
60 q->queue[i]->one->sha1, 20);
61 p->parent[n].mode = q->queue[i]->one->mode;
62 p->parent[n].status = q->queue[i]->status;
63 break;
64 }
65 }
66 if (!found)
67 p->len = 0;
68 }
69 return curr;
70}
71/* Lines lost from parent */
73struct lline {
74 struct lline *next;
75 int len;
76 unsigned long parent_map;
77 char line[FLEX_ARRAY];
78};
79/* Lines surviving in the merge result */
81struct sline {
82 struct lline *lost_head, **lost_tail;
83 char *bol;
84 int len;
85 /* bit 0 up to (N-1) are on if the parent has this line (i.e.
86 * we did not change it).
87 * bit N is used for "interesting" lines, including context.
88 */
89 unsigned long flag;
90 unsigned long *p_lno;
91};
92static char *grab_blob(const unsigned char *sha1, unsigned long *size)
94{
95 char *blob;
96 char type[20];
97 if (is_null_sha1(sha1)) {
98 /* deleted blob */
99 *size = 0;
100 return xcalloc(1, 1);
101 }
102 blob = read_sha1_file(sha1, type, size);
103 if (strcmp(type, blob_type))
104 die("object '%s' is not a blob!", sha1_to_hex(sha1));
105 return blob;
106}
107static void append_lost(struct sline *sline, int n, const char *line, int len)
109{
110 struct lline *lline;
111 unsigned long this_mask = (1UL<<n);
112 if (line[len-1] == '\n')
113 len--;
114 /* Check to see if we can squash things */
116 if (sline->lost_head) {
117 struct lline *last_one = NULL;
118 /* We cannot squash it with earlier one */
119 for (lline = sline->lost_head;
120 lline;
121 lline = lline->next)
122 if (lline->parent_map & this_mask)
123 last_one = lline;
124 lline = last_one ? last_one->next : sline->lost_head;
125 while (lline) {
126 if (lline->len == len &&
127 !memcmp(lline->line, line, len)) {
128 lline->parent_map |= this_mask;
129 return;
130 }
131 lline = lline->next;
132 }
133 }
134 lline = xmalloc(sizeof(*lline) + len + 1);
136 lline->len = len;
137 lline->next = NULL;
138 lline->parent_map = this_mask;
139 memcpy(lline->line, line, len);
140 lline->line[len] = 0;
141 *sline->lost_tail = lline;
142 sline->lost_tail = &lline->next;
143}
144struct combine_diff_state {
146 struct xdiff_emit_state xm;
147 unsigned int lno;
149 int ob, on, nb, nn;
150 unsigned long nmask;
151 int num_parent;
152 int n;
153 struct sline *sline;
154 struct sline *lost_bucket;
155};
156static void consume_line(void *state_, char *line, unsigned long len)
158{
159 struct combine_diff_state *state = state_;
160 if (5 < len && !memcmp("@@ -", line, 4)) {
161 if (parse_hunk_header(line, len,
162 &state->ob, &state->on,
163 &state->nb, &state->nn))
164 return;
165 state->lno = state->nb;
166 if (!state->nb)
167 /* @@ -1,2 +0,0 @@ to remove the
168 * first two lines...
169 */
170 state->nb = 1;
171 if (state->nn == 0)
172 /* @@ -X,Y +N,0 @@ removed Y lines
173 * that would have come *after* line N
174 * in the result. Our lost buckets hang
175 * to the line after the removed lines,
176 */
177 state->lost_bucket = &state->sline[state->nb];
178 else
179 state->lost_bucket = &state->sline[state->nb-1];
180 if (!state->sline[state->nb-1].p_lno)
181 state->sline[state->nb-1].p_lno =
182 xcalloc(state->num_parent,
183 sizeof(unsigned long));
184 state->sline[state->nb-1].p_lno[state->n] = state->ob;
185 return;
186 }
187 if (!state->lost_bucket)
188 return; /* not in any hunk yet */
189 switch (line[0]) {
190 case '-':
191 append_lost(state->lost_bucket, state->n, line+1, len-1);
192 break;
193 case '+':
194 state->sline[state->lno-1].flag |= state->nmask;
195 state->lno++;
196 break;
197 }
198}
199static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
201 struct sline *sline, unsigned int cnt, int n,
202 int num_parent)
203{
204 unsigned int p_lno, lno;
205 unsigned long nmask = (1UL << n);
206 xpparam_t xpp;
207 xdemitconf_t xecfg;
208 mmfile_t parent_file;
209 xdemitcb_t ecb;
210 struct combine_diff_state state;
211 unsigned long sz;
212 if (!cnt)
214 return; /* result deleted */
215 parent_file.ptr = grab_blob(parent, &sz);
217 parent_file.size = sz;
218 xpp.flags = XDF_NEED_MINIMAL;
219 xecfg.ctxlen = 0;
220 xecfg.flags = 0;
221 ecb.outf = xdiff_outf;
222 ecb.priv = &state;
223 memset(&state, 0, sizeof(state));
224 state.xm.consume = consume_line;
225 state.nmask = nmask;
226 state.sline = sline;
227 state.lno = 1;
228 state.num_parent = num_parent;
229 state.n = n;
230 xdl_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
232 free(parent_file.ptr);
233 /* Assign line numbers for this parent.
235 *
236 * sline[lno].p_lno[n] records the first line number
237 * (counting from 1) for parent N if the final hunk display
238 * started by showing sline[lno] (possibly showing the lost
239 * lines attached to it first).
240 */
241 for (lno = 0, p_lno = 1; lno <= cnt; lno++) {
242 struct lline *ll;
243 sline[lno].p_lno[n] = p_lno;
244 /* How many lines would this sline advance the p_lno? */
246 ll = sline[lno].lost_head;
247 while (ll) {
248 if (ll->parent_map & nmask)
249 p_lno++; /* '-' means parent had it */
250 ll = ll->next;
251 }
252 if (lno < cnt && !(sline[lno].flag & nmask))
253 p_lno++; /* no '+' means parent had it */
254 }
255 sline[lno].p_lno[n] = p_lno; /* trailer */
256}
257static unsigned long context = 3;
259static char combine_marker = '@';
260static int interesting(struct sline *sline, unsigned long all_mask)
262{
263 /* If some parents lost lines here, or if we have added to
264 * some parent, it is interesting.
265 */
266 return ((sline->flag & all_mask) || sline->lost_head);
267}
268static unsigned long adjust_hunk_tail(struct sline *sline,
270 unsigned long all_mask,
271 unsigned long hunk_begin,
272 unsigned long i)
273{
274 /* i points at the first uninteresting line. If the last line
275 * of the hunk was interesting only because it has some
276 * deletion, then it is not all that interesting for the
277 * purpose of giving trailing context lines. This is because
278 * we output '-' line and then unmodified sline[i-1] itself in
279 * that case which gives us one extra context line.
280 */
281 if ((hunk_begin + 1 <= i) && !(sline[i-1].flag & all_mask))
282 i--;
283 return i;
284}
285static unsigned long find_next(struct sline *sline,
287 unsigned long mark,
288 unsigned long i,
289 unsigned long cnt,
290 int look_for_uninteresting)
291{
292 /* We have examined up to i-1 and are about to look at i.
293 * Find next interesting or uninteresting line. Here,
294 * "interesting" does not mean interesting(), but marked by
295 * the give_context() function below (i.e. it includes context
296 * lines that are not interesting to interesting() function
297 * that are surrounded by interesting() ones.
298 */
299 while (i <= cnt)
300 if (look_for_uninteresting
301 ? !(sline[i].flag & mark)
302 : (sline[i].flag & mark))
303 return i;
304 else
305 i++;
306 return i;
307}
308static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
310{
311 unsigned long all_mask = (1UL<<num_parent) - 1;
312 unsigned long mark = (1UL<<num_parent);
313 unsigned long i;
314 /* Two groups of interesting lines may have a short gap of
316 * uninteresting lines. Connect such groups to give them a
317 * bit of context.
318 *
319 * We first start from what the interesting() function says,
320 * and mark them with "mark", and paint context lines with the
321 * mark. So interesting() would still say false for such context
322 * lines but they are treated as "interesting" in the end.
323 */
324 i = find_next(sline, mark, 0, cnt, 0);
325 if (cnt < i)
326 return 0;
327 while (i <= cnt) {
329 unsigned long j = (context < i) ? (i - context) : 0;
330 unsigned long k;
331 /* Paint a few lines before the first interesting line. */
333 while (j < i)
334 sline[j++].flag |= mark;
335 again:
337 /* we know up to i is to be included. where does the
338 * next uninteresting one start?
339 */
340 j = find_next(sline, mark, i, cnt, 1);
341 if (cnt < j)
342 break; /* the rest are all interesting */
343 /* lookahead context lines */
345 k = find_next(sline, mark, j, cnt, 0);
346 j = adjust_hunk_tail(sline, all_mask, i, j);
347 if (k < j + context) {
349 /* k is interesting and [j,k) are not, but
350 * paint them interesting because the gap is small.
351 */
352 while (j < k)
353 sline[j++].flag |= mark;
354 i = k;
355 goto again;
356 }
357 /* j is the first uninteresting line and there is
359 * no overlap beyond it within context lines. Paint
360 * the trailing edge a bit.
361 */
362 i = k;
363 k = (j + context < cnt+1) ? j + context : cnt+1;
364 while (j < k)
365 sline[j++].flag |= mark;
366 }
367 return 1;
368}
369static int make_hunks(struct sline *sline, unsigned long cnt,
371 int num_parent, int dense)
372{
373 unsigned long all_mask = (1UL<<num_parent) - 1;
374 unsigned long mark = (1UL<<num_parent);
375 unsigned long i;
376 int has_interesting = 0;
377 for (i = 0; i <= cnt; i++) {
379 if (interesting(&sline[i], all_mask))
380 sline[i].flag |= mark;
381 else
382 sline[i].flag &= ~mark;
383 }
384 if (!dense)
385 return give_context(sline, cnt, num_parent);
386 /* Look at each hunk, and if we have changes from only one
388 * parent, or the changes are the same from all but one
389 * parent, mark that uninteresting.
390 */
391 i = 0;
392 while (i <= cnt) {
393 unsigned long j, hunk_begin, hunk_end;
394 unsigned long same_diff;
395 while (i <= cnt && !(sline[i].flag & mark))
396 i++;
397 if (cnt < i)
398 break; /* No more interesting hunks */
399 hunk_begin = i;
400 for (j = i + 1; j <= cnt; j++) {
401 if (!(sline[j].flag & mark)) {
402 /* Look beyond the end to see if there
403 * is an interesting line after this
404 * hunk within context span.
405 */
406 unsigned long la; /* lookahead */
407 int contin = 0;
408 la = adjust_hunk_tail(sline, all_mask,
409 hunk_begin, j);
410 la = (la + context < cnt + 1) ?
411 (la + context) : cnt + 1;
412 while (j <= --la) {
413 if (sline[la].flag & mark) {
414 contin = 1;
415 break;
416 }
417 }
418 if (!contin)
419 break;
420 j = la;
421 }
422 }
423 hunk_end = j;
424 /* [i..hunk_end) are interesting. Now is it really
426 * interesting? We check if there are only two versions
427 * and the result matches one of them. That is, we look
428 * at:
429 * (+) line, which records lines added to which parents;
430 * this line appears in the result.
431 * (-) line, which records from what parents the line
432 * was removed; this line does not appear in the result.
433 * then check the set of parents the result has difference
434 * from, from all lines. If there are lines that has
435 * different set of parents that the result has differences
436 * from, that means we have more than two versions.
437 *
438 * Even when we have only two versions, if the result does
439 * not match any of the parents, the it should be considered
440 * interesting. In such a case, we would have all '+' line.
441 * After passing the above "two versions" test, that would
442 * appear as "the same set of parents" to be "all parents".
443 */
444 same_diff = 0;
445 has_interesting = 0;
446 for (j = i; j < hunk_end && !has_interesting; j++) {
447 unsigned long this_diff = sline[j].flag & all_mask;
448 struct lline *ll = sline[j].lost_head;
449 if (this_diff) {
450 /* This has some changes. Is it the
451 * same as others?
452 */
453 if (!same_diff)
454 same_diff = this_diff;
455 else if (same_diff != this_diff) {
456 has_interesting = 1;
457 break;
458 }
459 }
460 while (ll && !has_interesting) {
461 /* Lost this line from these parents;
462 * who are they? Are they the same?
463 */
464 this_diff = ll->parent_map;
465 if (!same_diff)
466 same_diff = this_diff;
467 else if (same_diff != this_diff) {
468 has_interesting = 1;
469 }
470 ll = ll->next;
471 }
472 }
473 if (!has_interesting && same_diff != all_mask) {
475 /* This hunk is not that interesting after all */
476 for (j = hunk_begin; j < hunk_end; j++)
477 sline[j].flag &= ~mark;
478 }
479 i = hunk_end;
480 }
481 has_interesting = give_context(sline, cnt, num_parent);
483 return has_interesting;
484}
485static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n)
487{
488 l0 = sline[l0].p_lno[n];
489 l1 = sline[l1].p_lno[n];
490 printf(" -%lu,%lu", l0, l1-l0);
491}
492static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
494 int use_color)
495{
496 unsigned long mark = (1UL<<num_parent);
497 int i;
498 unsigned long lno = 0;
499 const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO);
500 const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW);
501 const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD);
502 const char *c_plain = diff_get_color(use_color, DIFF_PLAIN);
503 const char *c_reset = diff_get_color(use_color, DIFF_RESET);
504 if (!cnt)
506 return; /* result deleted */
507 while (1) {
509 struct sline *sl = &sline[lno];
510 unsigned long hunk_end;
511 unsigned long rlines;
512 while (lno <= cnt && !(sline[lno].flag & mark))
513 lno++;
514 if (cnt < lno)
515 break;
516 else {
517 for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++)
518 if (!(sline[hunk_end].flag & mark))
519 break;
520 }
521 rlines = hunk_end - lno;
522 if (cnt < hunk_end)
523 rlines--; /* pointing at the last delete hunk */
524 fputs(c_frag, stdout);
525 for (i = 0; i <= num_parent; i++) putchar(combine_marker);
526 for (i = 0; i < num_parent; i++)
527 show_parent_lno(sline, lno, hunk_end, i);
528 printf(" +%lu,%lu ", lno+1, rlines);
529 for (i = 0; i <= num_parent; i++) putchar(combine_marker);
530 printf("%s\n", c_reset);
531 while (lno < hunk_end) {
532 struct lline *ll;
533 int j;
534 unsigned long p_mask;
535 sl = &sline[lno++];
536 ll = sl->lost_head;
537 while (ll) {
538 fputs(c_old, stdout);
539 for (j = 0; j < num_parent; j++) {
540 if (ll->parent_map & (1UL<<j))
541 putchar('-');
542 else
543 putchar(' ');
544 }
545 printf("%s%s\n", ll->line, c_reset);
546 ll = ll->next;
547 }
548 if (cnt < lno)
549 break;
550 p_mask = 1;
551 if (!(sl->flag & (mark-1)))
552 fputs(c_plain, stdout);
553 else
554 fputs(c_new, stdout);
555 for (j = 0; j < num_parent; j++) {
556 if (p_mask & sl->flag)
557 putchar('+');
558 else
559 putchar(' ');
560 p_mask <<= 1;
561 }
562 printf("%.*s%s\n", sl->len, sl->bol, c_reset);
563 }
564 }
565}
566static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
568 int i, int j)
569{
570 /* We have already examined parent j and we know parent i
571 * and parent j are the same, so reuse the combined result
572 * of parent j for parent i.
573 */
574 unsigned long lno, imask, jmask;
575 imask = (1UL<<i);
576 jmask = (1UL<<j);
577 for (lno = 0; lno <= cnt; lno++) {
579 struct lline *ll = sline->lost_head;
580 sline->p_lno[i] = sline->p_lno[j];
581 while (ll) {
582 if (ll->parent_map & jmask)
583 ll->parent_map |= imask;
584 ll = ll->next;
585 }
586 if (sline->flag & jmask)
587 sline->flag |= imask;
588 sline++;
589 }
590 /* the overall size of the file (sline[cnt]) */
591 sline->p_lno[i] = sline->p_lno[j];
592}
593static void dump_quoted_path(const char *prefix, const char *path,
595 const char *c_meta, const char *c_reset)
596{
597 printf("%s%s", c_meta, prefix);
598 if (quote_c_style(path, NULL, NULL, 0))
599 quote_c_style(path, NULL, stdout, 0);
600 else
601 printf("%s", path);
602 printf("%s\n", c_reset);
603}
604static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
606 int dense, struct rev_info *rev)
607{
608 struct diff_options *opt = &rev->diffopt;
609 unsigned long result_size, cnt, lno;
610 char *result, *cp;
611 struct sline *sline; /* survived lines */
612 int mode_differs = 0;
613 int i, show_hunks;
614 int working_tree_file = is_null_sha1(elem->sha1);
615 int abbrev = opt->full_index ? 40 : DEFAULT_ABBREV;
616 mmfile_t result_file;
617 context = opt->context;
619 /* Read the result of merge first */
620 if (!working_tree_file)
621 result = grab_blob(elem->sha1, &result_size);
622 else {
623 /* Used by diff-tree to read from the working tree */
624 struct stat st;
625 int fd;
626 if (0 <= (fd = open(elem->path, O_RDONLY)) &&
627 !fstat(fd, &st)) {
628 int len = st.st_size;
629 int sz = 0;
630 elem->mode = canon_mode(st.st_mode);
632 result_size = len;
633 result = xmalloc(len + 1);
634 while (sz < len) {
635 int done = xread(fd, result+sz, len-sz);
636 if (done == 0)
637 break;
638 if (done < 0)
639 die("read error '%s'", elem->path);
640 sz += done;
641 }
642 result[len] = 0;
643 }
644 else {
645 /* deleted file */
646 result_size = 0;
647 elem->mode = 0;
648 result = xcalloc(1, 1);
649 }
650 if (0 <= fd)
651 close(fd);
652 }
653 for (cnt = 0, cp = result; cp < result + result_size; cp++) {
655 if (*cp == '\n')
656 cnt++;
657 }
658 if (result_size && result[result_size-1] != '\n')
659 cnt++; /* incomplete line */
660 sline = xcalloc(cnt+2, sizeof(*sline));
662 sline[0].bol = result;
663 for (lno = 0; lno <= cnt + 1; lno++) {
664 sline[lno].lost_tail = &sline[lno].lost_head;
665 sline[lno].flag = 0;
666 }
667 for (lno = 0, cp = result; cp < result + result_size; cp++) {
668 if (*cp == '\n') {
669 sline[lno].len = cp - sline[lno].bol;
670 lno++;
671 if (lno < cnt)
672 sline[lno].bol = cp + 1;
673 }
674 }
675 if (result_size && result[result_size-1] != '\n')
676 sline[cnt-1].len = result_size - (sline[cnt-1].bol - result);
677 result_file.ptr = result;
679 result_file.size = result_size;
680 /* Even p_lno[cnt+1] is valid -- that is for the end line number
682 * for deletion hunk at the end.
683 */
684 sline[0].p_lno = xcalloc((cnt+2) * num_parent, sizeof(unsigned long));
685 for (lno = 0; lno <= cnt; lno++)
686 sline[lno+1].p_lno = sline[lno].p_lno + num_parent;
687 for (i = 0; i < num_parent; i++) {
689 int j;
690 for (j = 0; j < i; j++) {
691 if (!hashcmp(elem->parent[i].sha1,
692 elem->parent[j].sha1)) {
693 reuse_combine_diff(sline, cnt, i, j);
694 break;
695 }
696 }
697 if (i <= j)
698 combine_diff(elem->parent[i].sha1, &result_file, sline,
699 cnt, i, num_parent);
700 if (elem->parent[i].mode != elem->mode)
701 mode_differs = 1;
702 }
703 show_hunks = make_hunks(sline, cnt, num_parent, dense);
705 if (show_hunks || mode_differs || working_tree_file) {
707 const char *abb;
708 int use_color = opt->color_diff;
709 const char *c_meta = diff_get_color(use_color, DIFF_METAINFO);
710 const char *c_reset = diff_get_color(use_color, DIFF_RESET);
711 if (rev->loginfo)
713 show_log(rev, opt->msg_sep);
714 dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
715 elem->path, c_meta, c_reset);
716 printf("%sindex ", c_meta);
717 for (i = 0; i < num_parent; i++) {
718 abb = find_unique_abbrev(elem->parent[i].sha1,
719 abbrev);
720 printf("%s%s", i ? "," : "", abb);
721 }
722 abb = find_unique_abbrev(elem->sha1, abbrev);
723 printf("..%s%s\n", abb, c_reset);
724 if (mode_differs) {
726 int added = !!elem->mode;
727 for (i = 0; added && i < num_parent; i++)
728 if (elem->parent[i].status !=
729 DIFF_STATUS_ADDED)
730 added = 0;
731 if (added)
732 printf("%snew file mode %06o",
733 c_meta, elem->mode);
734 else {
735 if (!elem->mode)
736 printf("%sdeleted file ", c_meta);
737 printf("mode ");
738 for (i = 0; i < num_parent; i++) {
739 printf("%s%06o", i ? "," : "",
740 elem->parent[i].mode);
741 }
742 if (elem->mode)
743 printf("..%06o", elem->mode);
744 }
745 printf("%s\n", c_reset);
746 }
747 dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
748 dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
749 dump_sline(sline, cnt, num_parent, opt->color_diff);
750 }
751 free(result);
752 for (lno = 0; lno < cnt; lno++) {
754 if (sline[lno].lost_head) {
755 struct lline *ll = sline[lno].lost_head;
756 while (ll) {
757 struct lline *tmp = ll;
758 ll = ll->next;
759 free(tmp);
760 }
761 }
762 }
763 free(sline[0].p_lno);
764 free(sline);
765}
766#define COLONS "::::::::::::::::::::::::::::::::"
768static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct rev_info *rev)
770{
771 struct diff_options *opt = &rev->diffopt;
772 int i, offset;
773 const char *prefix;
774 int line_termination, inter_name_termination;
775 line_termination = opt->line_termination;
777 inter_name_termination = '\t';
778 if (!line_termination)
779 inter_name_termination = 0;
780 if (rev->loginfo)
782 show_log(rev, opt->msg_sep);
783 if (opt->output_format & DIFF_FORMAT_RAW) {
785 offset = strlen(COLONS) - num_parent;
786 if (offset < 0)
787 offset = 0;
788 prefix = COLONS + offset;
789 /* Show the modes */
791 for (i = 0; i < num_parent; i++) {
792 printf("%s%06o", prefix, p->parent[i].mode);
793 prefix = " ";
794 }
795 printf("%s%06o", prefix, p->mode);
796 /* Show sha1's */
798 for (i = 0; i < num_parent; i++)
799 printf(" %s", diff_unique_abbrev(p->parent[i].sha1,
800 opt->abbrev));
801 printf(" %s ", diff_unique_abbrev(p->sha1, opt->abbrev));
802 }
803 if (opt->output_format & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) {
805 for (i = 0; i < num_parent; i++)
806 putchar(p->parent[i].status);
807 putchar(inter_name_termination);
808 }
809 if (line_termination) {
811 if (quote_c_style(p->path, NULL, NULL, 0))
812 quote_c_style(p->path, NULL, stdout, 0);
813 else
814 printf("%s", p->path);
815 putchar(line_termination);
816 }
817 else {
818 printf("%s%c", p->path, line_termination);
819 }
820}
821void show_combined_diff(struct combine_diff_path *p,
823 int num_parent,
824 int dense,
825 struct rev_info *rev)
826{
827 struct diff_options *opt = &rev->diffopt;
828 if (!p->len)
829 return;
830 if (opt->output_format & (DIFF_FORMAT_RAW |
831 DIFF_FORMAT_NAME |
832 DIFF_FORMAT_NAME_STATUS))
833 show_raw_diff(p, num_parent, rev);
834 else if (opt->output_format & DIFF_FORMAT_PATCH)
835 show_patch_diff(p, num_parent, dense, rev);
836}
837void diff_tree_combined(const unsigned char *sha1,
839 const unsigned char parent[][20],
840 int num_parent,
841 int dense,
842 struct rev_info *rev)
843{
844 struct diff_options *opt = &rev->diffopt;
845 struct diff_options diffopts;
846 struct combine_diff_path *p, *paths = NULL;
847 int i, num_paths, needsep, show_log_first;
848 diffopts = *opt;
850 diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
851 diffopts.recursive = 1;
852 show_log_first = !!rev->loginfo;
854 needsep = 0;
855 /* find set of paths that everybody touches */
856 for (i = 0; i < num_parent; i++) {
857 /* show stat against the first parent even
858 * when doing combined diff.
859 */
860 if (i == 0 && opt->output_format & DIFF_FORMAT_DIFFSTAT)
861 diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
862 else
863 diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
864 diff_tree_sha1(parent[i], sha1, "", &diffopts);
865 diffcore_std(&diffopts);
866 paths = intersect_paths(paths, i, num_parent);
867 if (show_log_first && i == 0) {
869 show_log(rev, opt->msg_sep);
870 if (rev->verbose_header && opt->output_format)
871 putchar(opt->line_termination);
872 }
873 diff_flush(&diffopts);
874 }
875 /* find out surviving paths */
877 for (num_paths = 0, p = paths; p; p = p->next) {
878 if (p->len)
879 num_paths++;
880 }
881 if (num_paths) {
882 if (opt->output_format & (DIFF_FORMAT_RAW |
883 DIFF_FORMAT_NAME |
884 DIFF_FORMAT_NAME_STATUS)) {
885 for (p = paths; p; p = p->next) {
886 if (p->len)
887 show_raw_diff(p, num_parent, rev);
888 }
889 needsep = 1;
890 }
891 else if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
892 needsep = 1;
893 if (opt->output_format & DIFF_FORMAT_PATCH) {
894 if (needsep)
895 putchar(opt->line_termination);
896 for (p = paths; p; p = p->next) {
897 if (p->len)
898 show_patch_diff(p, num_parent, dense,
899 rev);
900 }
901 }
902 }
903 /* Clean things up */
905 while (paths) {
906 struct combine_diff_path *tmp = paths;
907 paths = paths->next;
908 free(tmp);
909 }
910}
911void diff_tree_combined_merge(const unsigned char *sha1,
913 int dense, struct rev_info *rev)
914{
915 int num_parent;
916 const unsigned char (*parent)[20];
917 struct commit *commit = lookup_commit(sha1);
918 struct commit_list *parents;
919 /* count parents */
921 for (parents = commit->parents, num_parent = 0;
922 parents;
923 parents = parents->next, num_parent++)
924 ; /* nothing */
925 parent = xmalloc(num_parent * sizeof(*parent));
927 for (parents = commit->parents, num_parent = 0;
928 parents;
929 parents = parents->next, num_parent++)
930 memcpy(parent + num_parent, parents->item->object.sha1, 20);
931 diff_tree_combined(sha1, parent, num_parent, dense, rev);
932}