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 hashcpy(p->sha1, q->queue[i]->two->sha1);
35 p->mode = q->queue[i]->two->mode;
36 hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
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 hashcpy(p->parent[n].sha1, q->queue[i]->one->sha1);
60 p->parent[n].mode = q->queue[i]->one->mode;
61 p->parent[n].status = q->queue[i]->status;
62 break;
63 }
64 }
65 if (!found)
66 p->len = 0;
67 }
68 return curr;
69}
70/* Lines lost from parent */
72struct lline {
73 struct lline *next;
74 int len;
75 unsigned long parent_map;
76 char line[FLEX_ARRAY];
77};
78/* Lines surviving in the merge result */
80struct sline {
81 struct lline *lost_head, **lost_tail;
82 char *bol;
83 int len;
84 /* bit 0 up to (N-1) are on if the parent has this line (i.e.
85 * we did not change it).
86 * bit N is used for "interesting" lines, including context.
87 */
88 unsigned long flag;
89 unsigned long *p_lno;
90};
91static char *grab_blob(const unsigned char *sha1, unsigned long *size)
93{
94 char *blob;
95 char type[20];
96 if (is_null_sha1(sha1)) {
97 /* deleted blob */
98 *size = 0;
99 return xcalloc(1, 1);
100 }
101 blob = read_sha1_file(sha1, type, size);
102 if (strcmp(type, blob_type))
103 die("object '%s' is not a blob!", sha1_to_hex(sha1));
104 return blob;
105}
106static void append_lost(struct sline *sline, int n, const char *line, int len)
108{
109 struct lline *lline;
110 unsigned long this_mask = (1UL<<n);
111 if (line[len-1] == '\n')
112 len--;
113 /* Check to see if we can squash things */
115 if (sline->lost_head) {
116 struct lline *last_one = NULL;
117 /* We cannot squash it with earlier one */
118 for (lline = sline->lost_head;
119 lline;
120 lline = lline->next)
121 if (lline->parent_map & this_mask)
122 last_one = lline;
123 lline = last_one ? last_one->next : sline->lost_head;
124 while (lline) {
125 if (lline->len == len &&
126 !memcmp(lline->line, line, len)) {
127 lline->parent_map |= this_mask;
128 return;
129 }
130 lline = lline->next;
131 }
132 }
133 lline = xmalloc(sizeof(*lline) + len + 1);
135 lline->len = len;
136 lline->next = NULL;
137 lline->parent_map = this_mask;
138 memcpy(lline->line, line, len);
139 lline->line[len] = 0;
140 *sline->lost_tail = lline;
141 sline->lost_tail = &lline->next;
142}
143struct combine_diff_state {
145 struct xdiff_emit_state xm;
146 unsigned int lno;
148 int ob, on, nb, nn;
149 unsigned long nmask;
150 int num_parent;
151 int n;
152 struct sline *sline;
153 struct sline *lost_bucket;
154};
155static void consume_line(void *state_, char *line, unsigned long len)
157{
158 struct combine_diff_state *state = state_;
159 if (5 < len && !memcmp("@@ -", line, 4)) {
160 if (parse_hunk_header(line, len,
161 &state->ob, &state->on,
162 &state->nb, &state->nn))
163 return;
164 state->lno = state->nb;
165 if (!state->nb)
166 /* @@ -1,2 +0,0 @@ to remove the
167 * first two lines...
168 */
169 state->nb = 1;
170 if (state->nn == 0)
171 /* @@ -X,Y +N,0 @@ removed Y lines
172 * that would have come *after* line N
173 * in the result. Our lost buckets hang
174 * to the line after the removed lines,
175 */
176 state->lost_bucket = &state->sline[state->nb];
177 else
178 state->lost_bucket = &state->sline[state->nb-1];
179 if (!state->sline[state->nb-1].p_lno)
180 state->sline[state->nb-1].p_lno =
181 xcalloc(state->num_parent,
182 sizeof(unsigned long));
183 state->sline[state->nb-1].p_lno[state->n] = state->ob;
184 return;
185 }
186 if (!state->lost_bucket)
187 return; /* not in any hunk yet */
188 switch (line[0]) {
189 case '-':
190 append_lost(state->lost_bucket, state->n, line+1, len-1);
191 break;
192 case '+':
193 state->sline[state->lno-1].flag |= state->nmask;
194 state->lno++;
195 break;
196 }
197}
198static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
200 struct sline *sline, unsigned int cnt, int n,
201 int num_parent)
202{
203 unsigned int p_lno, lno;
204 unsigned long nmask = (1UL << n);
205 xpparam_t xpp;
206 xdemitconf_t xecfg;
207 mmfile_t parent_file;
208 xdemitcb_t ecb;
209 struct combine_diff_state state;
210 unsigned long sz;
211 if (!cnt)
213 return; /* result deleted */
214 parent_file.ptr = grab_blob(parent, &sz);
216 parent_file.size = sz;
217 xpp.flags = XDF_NEED_MINIMAL;
218 xecfg.ctxlen = 0;
219 xecfg.flags = 0;
220 ecb.outf = xdiff_outf;
221 ecb.priv = &state;
222 memset(&state, 0, sizeof(state));
223 state.xm.consume = consume_line;
224 state.nmask = nmask;
225 state.sline = sline;
226 state.lno = 1;
227 state.num_parent = num_parent;
228 state.n = n;
229 xdl_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
231 free(parent_file.ptr);
232 /* Assign line numbers for this parent.
234 *
235 * sline[lno].p_lno[n] records the first line number
236 * (counting from 1) for parent N if the final hunk display
237 * started by showing sline[lno] (possibly showing the lost
238 * lines attached to it first).
239 */
240 for (lno = 0, p_lno = 1; lno <= cnt; lno++) {
241 struct lline *ll;
242 sline[lno].p_lno[n] = p_lno;
243 /* How many lines would this sline advance the p_lno? */
245 ll = sline[lno].lost_head;
246 while (ll) {
247 if (ll->parent_map & nmask)
248 p_lno++; /* '-' means parent had it */
249 ll = ll->next;
250 }
251 if (lno < cnt && !(sline[lno].flag & nmask))
252 p_lno++; /* no '+' means parent had it */
253 }
254 sline[lno].p_lno[n] = p_lno; /* trailer */
255}
256static unsigned long context = 3;
258static char combine_marker = '@';
259static int interesting(struct sline *sline, unsigned long all_mask)
261{
262 /* If some parents lost lines here, or if we have added to
263 * some parent, it is interesting.
264 */
265 return ((sline->flag & all_mask) || sline->lost_head);
266}
267static unsigned long adjust_hunk_tail(struct sline *sline,
269 unsigned long all_mask,
270 unsigned long hunk_begin,
271 unsigned long i)
272{
273 /* i points at the first uninteresting line. If the last line
274 * of the hunk was interesting only because it has some
275 * deletion, then it is not all that interesting for the
276 * purpose of giving trailing context lines. This is because
277 * we output '-' line and then unmodified sline[i-1] itself in
278 * that case which gives us one extra context line.
279 */
280 if ((hunk_begin + 1 <= i) && !(sline[i-1].flag & all_mask))
281 i--;
282 return i;
283}
284static unsigned long find_next(struct sline *sline,
286 unsigned long mark,
287 unsigned long i,
288 unsigned long cnt,
289 int look_for_uninteresting)
290{
291 /* We have examined up to i-1 and are about to look at i.
292 * Find next interesting or uninteresting line. Here,
293 * "interesting" does not mean interesting(), but marked by
294 * the give_context() function below (i.e. it includes context
295 * lines that are not interesting to interesting() function
296 * that are surrounded by interesting() ones.
297 */
298 while (i <= cnt)
299 if (look_for_uninteresting
300 ? !(sline[i].flag & mark)
301 : (sline[i].flag & mark))
302 return i;
303 else
304 i++;
305 return i;
306}
307static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
309{
310 unsigned long all_mask = (1UL<<num_parent) - 1;
311 unsigned long mark = (1UL<<num_parent);
312 unsigned long i;
313 /* Two groups of interesting lines may have a short gap of
315 * uninteresting lines. Connect such groups to give them a
316 * bit of context.
317 *
318 * We first start from what the interesting() function says,
319 * and mark them with "mark", and paint context lines with the
320 * mark. So interesting() would still say false for such context
321 * lines but they are treated as "interesting" in the end.
322 */
323 i = find_next(sline, mark, 0, cnt, 0);
324 if (cnt < i)
325 return 0;
326 while (i <= cnt) {
328 unsigned long j = (context < i) ? (i - context) : 0;
329 unsigned long k;
330 /* Paint a few lines before the first interesting line. */
332 while (j < i)
333 sline[j++].flag |= mark;
334 again:
336 /* we know up to i is to be included. where does the
337 * next uninteresting one start?
338 */
339 j = find_next(sline, mark, i, cnt, 1);
340 if (cnt < j)
341 break; /* the rest are all interesting */
342 /* lookahead context lines */
344 k = find_next(sline, mark, j, cnt, 0);
345 j = adjust_hunk_tail(sline, all_mask, i, j);
346 if (k < j + context) {
348 /* k is interesting and [j,k) are not, but
349 * paint them interesting because the gap is small.
350 */
351 while (j < k)
352 sline[j++].flag |= mark;
353 i = k;
354 goto again;
355 }
356 /* j is the first uninteresting line and there is
358 * no overlap beyond it within context lines. Paint
359 * the trailing edge a bit.
360 */
361 i = k;
362 k = (j + context < cnt+1) ? j + context : cnt+1;
363 while (j < k)
364 sline[j++].flag |= mark;
365 }
366 return 1;
367}
368static int make_hunks(struct sline *sline, unsigned long cnt,
370 int num_parent, int dense)
371{
372 unsigned long all_mask = (1UL<<num_parent) - 1;
373 unsigned long mark = (1UL<<num_parent);
374 unsigned long i;
375 int has_interesting = 0;
376 for (i = 0; i <= cnt; i++) {
378 if (interesting(&sline[i], all_mask))
379 sline[i].flag |= mark;
380 else
381 sline[i].flag &= ~mark;
382 }
383 if (!dense)
384 return give_context(sline, cnt, num_parent);
385 /* Look at each hunk, and if we have changes from only one
387 * parent, or the changes are the same from all but one
388 * parent, mark that uninteresting.
389 */
390 i = 0;
391 while (i <= cnt) {
392 unsigned long j, hunk_begin, hunk_end;
393 unsigned long same_diff;
394 while (i <= cnt && !(sline[i].flag & mark))
395 i++;
396 if (cnt < i)
397 break; /* No more interesting hunks */
398 hunk_begin = i;
399 for (j = i + 1; j <= cnt; j++) {
400 if (!(sline[j].flag & mark)) {
401 /* Look beyond the end to see if there
402 * is an interesting line after this
403 * hunk within context span.
404 */
405 unsigned long la; /* lookahead */
406 int contin = 0;
407 la = adjust_hunk_tail(sline, all_mask,
408 hunk_begin, j);
409 la = (la + context < cnt + 1) ?
410 (la + context) : cnt + 1;
411 while (j <= --la) {
412 if (sline[la].flag & mark) {
413 contin = 1;
414 break;
415 }
416 }
417 if (!contin)
418 break;
419 j = la;
420 }
421 }
422 hunk_end = j;
423 /* [i..hunk_end) are interesting. Now is it really
425 * interesting? We check if there are only two versions
426 * and the result matches one of them. That is, we look
427 * at:
428 * (+) line, which records lines added to which parents;
429 * this line appears in the result.
430 * (-) line, which records from what parents the line
431 * was removed; this line does not appear in the result.
432 * then check the set of parents the result has difference
433 * from, from all lines. If there are lines that has
434 * different set of parents that the result has differences
435 * from, that means we have more than two versions.
436 *
437 * Even when we have only two versions, if the result does
438 * not match any of the parents, the it should be considered
439 * interesting. In such a case, we would have all '+' line.
440 * After passing the above "two versions" test, that would
441 * appear as "the same set of parents" to be "all parents".
442 */
443 same_diff = 0;
444 has_interesting = 0;
445 for (j = i; j < hunk_end && !has_interesting; j++) {
446 unsigned long this_diff = sline[j].flag & all_mask;
447 struct lline *ll = sline[j].lost_head;
448 if (this_diff) {
449 /* This has some changes. Is it the
450 * same as others?
451 */
452 if (!same_diff)
453 same_diff = this_diff;
454 else if (same_diff != this_diff) {
455 has_interesting = 1;
456 break;
457 }
458 }
459 while (ll && !has_interesting) {
460 /* Lost this line from these parents;
461 * who are they? Are they the same?
462 */
463 this_diff = ll->parent_map;
464 if (!same_diff)
465 same_diff = this_diff;
466 else if (same_diff != this_diff) {
467 has_interesting = 1;
468 }
469 ll = ll->next;
470 }
471 }
472 if (!has_interesting && same_diff != all_mask) {
474 /* This hunk is not that interesting after all */
475 for (j = hunk_begin; j < hunk_end; j++)
476 sline[j].flag &= ~mark;
477 }
478 i = hunk_end;
479 }
480 has_interesting = give_context(sline, cnt, num_parent);
482 return has_interesting;
483}
484static void show_parent_lno(struct sline *sline, unsigned long l0, unsigned long l1, int n)
486{
487 l0 = sline[l0].p_lno[n];
488 l1 = sline[l1].p_lno[n];
489 printf(" -%lu,%lu", l0, l1-l0);
490}
491static int hunk_comment_line(const char *bol)
493{
494 int ch;
495 if (!bol)
497 return 0;
498 ch = *bol & 0xff;
499 return (isalpha(ch) || ch == '_' || ch == '$');
500}
501static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
503 int use_color)
504{
505 unsigned long mark = (1UL<<num_parent);
506 int i;
507 unsigned long lno = 0;
508 const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO);
509 const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW);
510 const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD);
511 const char *c_plain = diff_get_color(use_color, DIFF_PLAIN);
512 const char *c_reset = diff_get_color(use_color, DIFF_RESET);
513 if (!cnt)
515 return; /* result deleted */
516 while (1) {
518 struct sline *sl = &sline[lno];
519 unsigned long hunk_end;
520 unsigned long rlines;
521 const char *hunk_comment = NULL;
522 while (lno <= cnt && !(sline[lno].flag & mark)) {
524 if (hunk_comment_line(sline[lno].bol))
525 hunk_comment = sline[lno].bol;
526 lno++;
527 }
528 if (cnt < lno)
529 break;
530 else {
531 for (hunk_end = lno + 1; hunk_end <= cnt; hunk_end++)
532 if (!(sline[hunk_end].flag & mark))
533 break;
534 }
535 rlines = hunk_end - lno;
536 if (cnt < hunk_end)
537 rlines--; /* pointing at the last delete hunk */
538 fputs(c_frag, stdout);
539 for (i = 0; i <= num_parent; i++) putchar(combine_marker);
540 for (i = 0; i < num_parent; i++)
541 show_parent_lno(sline, lno, hunk_end, i);
542 printf(" +%lu,%lu ", lno+1, rlines);
543 for (i = 0; i <= num_parent; i++) putchar(combine_marker);
544 if (hunk_comment) {
546 int comment_end = 0;
547 for (i = 0; i < 40; i++) {
548 int ch = hunk_comment[i] & 0xff;
549 if (!ch || ch == '\n')
550 break;
551 if (!isspace(ch))
552 comment_end = i;
553 }
554 if (comment_end)
555 putchar(' ');
556 for (i = 0; i < comment_end; i++)
557 putchar(hunk_comment[i]);
558 }
559 printf("%s\n", c_reset);
561 while (lno < hunk_end) {
562 struct lline *ll;
563 int j;
564 unsigned long p_mask;
565 sl = &sline[lno++];
566 ll = sl->lost_head;
567 while (ll) {
568 fputs(c_old, stdout);
569 for (j = 0; j < num_parent; j++) {
570 if (ll->parent_map & (1UL<<j))
571 putchar('-');
572 else
573 putchar(' ');
574 }
575 printf("%s%s\n", ll->line, c_reset);
576 ll = ll->next;
577 }
578 if (cnt < lno)
579 break;
580 p_mask = 1;
581 if (!(sl->flag & (mark-1)))
582 fputs(c_plain, stdout);
583 else
584 fputs(c_new, stdout);
585 for (j = 0; j < num_parent; j++) {
586 if (p_mask & sl->flag)
587 putchar('+');
588 else
589 putchar(' ');
590 p_mask <<= 1;
591 }
592 printf("%.*s%s\n", sl->len, sl->bol, c_reset);
593 }
594 }
595}
596static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
598 int i, int j)
599{
600 /* We have already examined parent j and we know parent i
601 * and parent j are the same, so reuse the combined result
602 * of parent j for parent i.
603 */
604 unsigned long lno, imask, jmask;
605 imask = (1UL<<i);
606 jmask = (1UL<<j);
607 for (lno = 0; lno <= cnt; lno++) {
609 struct lline *ll = sline->lost_head;
610 sline->p_lno[i] = sline->p_lno[j];
611 while (ll) {
612 if (ll->parent_map & jmask)
613 ll->parent_map |= imask;
614 ll = ll->next;
615 }
616 if (sline->flag & jmask)
617 sline->flag |= imask;
618 sline++;
619 }
620 /* the overall size of the file (sline[cnt]) */
621 sline->p_lno[i] = sline->p_lno[j];
622}
623static void dump_quoted_path(const char *prefix, const char *path,
625 const char *c_meta, const char *c_reset)
626{
627 printf("%s%s", c_meta, prefix);
628 if (quote_c_style(path, NULL, NULL, 0))
629 quote_c_style(path, NULL, stdout, 0);
630 else
631 printf("%s", path);
632 printf("%s\n", c_reset);
633}
634static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
636 int dense, struct rev_info *rev)
637{
638 struct diff_options *opt = &rev->diffopt;
639 unsigned long result_size, cnt, lno;
640 char *result, *cp;
641 struct sline *sline; /* survived lines */
642 int mode_differs = 0;
643 int i, show_hunks;
644 int working_tree_file = is_null_sha1(elem->sha1);
645 int abbrev = opt->full_index ? 40 : DEFAULT_ABBREV;
646 mmfile_t result_file;
647 context = opt->context;
649 /* Read the result of merge first */
650 if (!working_tree_file)
651 result = grab_blob(elem->sha1, &result_size);
652 else {
653 /* Used by diff-tree to read from the working tree */
654 struct stat st;
655 int fd;
656 if (0 <= (fd = open(elem->path, O_RDONLY)) &&
657 !fstat(fd, &st)) {
658 int len = st.st_size;
659 int sz = 0;
660 elem->mode = canon_mode(st.st_mode);
662 result_size = len;
663 result = xmalloc(len + 1);
664 while (sz < len) {
665 int done = xread(fd, result+sz, len-sz);
666 if (done == 0)
667 break;
668 if (done < 0)
669 die("read error '%s'", elem->path);
670 sz += done;
671 }
672 result[len] = 0;
673 }
674 else {
675 /* deleted file */
676 result_size = 0;
677 elem->mode = 0;
678 result = xcalloc(1, 1);
679 }
680 if (0 <= fd)
681 close(fd);
682 }
683 for (cnt = 0, cp = result; cp < result + result_size; cp++) {
685 if (*cp == '\n')
686 cnt++;
687 }
688 if (result_size && result[result_size-1] != '\n')
689 cnt++; /* incomplete line */
690 sline = xcalloc(cnt+2, sizeof(*sline));
692 sline[0].bol = result;
693 for (lno = 0; lno <= cnt + 1; lno++) {
694 sline[lno].lost_tail = &sline[lno].lost_head;
695 sline[lno].flag = 0;
696 }
697 for (lno = 0, cp = result; cp < result + result_size; cp++) {
698 if (*cp == '\n') {
699 sline[lno].len = cp - sline[lno].bol;
700 lno++;
701 if (lno < cnt)
702 sline[lno].bol = cp + 1;
703 }
704 }
705 if (result_size && result[result_size-1] != '\n')
706 sline[cnt-1].len = result_size - (sline[cnt-1].bol - result);
707 result_file.ptr = result;
709 result_file.size = result_size;
710 /* Even p_lno[cnt+1] is valid -- that is for the end line number
712 * for deletion hunk at the end.
713 */
714 sline[0].p_lno = xcalloc((cnt+2) * num_parent, sizeof(unsigned long));
715 for (lno = 0; lno <= cnt; lno++)
716 sline[lno+1].p_lno = sline[lno].p_lno + num_parent;
717 for (i = 0; i < num_parent; i++) {
719 int j;
720 for (j = 0; j < i; j++) {
721 if (!hashcmp(elem->parent[i].sha1,
722 elem->parent[j].sha1)) {
723 reuse_combine_diff(sline, cnt, i, j);
724 break;
725 }
726 }
727 if (i <= j)
728 combine_diff(elem->parent[i].sha1, &result_file, sline,
729 cnt, i, num_parent);
730 if (elem->parent[i].mode != elem->mode)
731 mode_differs = 1;
732 }
733 show_hunks = make_hunks(sline, cnt, num_parent, dense);
735 if (show_hunks || mode_differs || working_tree_file) {
737 const char *abb;
738 int use_color = opt->color_diff;
739 const char *c_meta = diff_get_color(use_color, DIFF_METAINFO);
740 const char *c_reset = diff_get_color(use_color, DIFF_RESET);
741 int added = 0;
742 int deleted = 0;
743 if (rev->loginfo && !rev->no_commit_id)
745 show_log(rev, opt->msg_sep);
746 dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
747 elem->path, c_meta, c_reset);
748 printf("%sindex ", c_meta);
749 for (i = 0; i < num_parent; i++) {
750 abb = find_unique_abbrev(elem->parent[i].sha1,
751 abbrev);
752 printf("%s%s", i ? "," : "", abb);
753 }
754 abb = find_unique_abbrev(elem->sha1, abbrev);
755 printf("..%s%s\n", abb, c_reset);
756 if (mode_differs) {
758 deleted = !elem->mode;
759 /* We say it was added if nobody had it */
761 added = !deleted;
762 for (i = 0; added && i < num_parent; i++)
763 if (elem->parent[i].status !=
764 DIFF_STATUS_ADDED)
765 added = 0;
766 if (added)
767 printf("%snew file mode %06o",
768 c_meta, elem->mode);
769 else {
770 if (deleted)
771 printf("%sdeleted file ", c_meta);
772 printf("mode ");
773 for (i = 0; i < num_parent; i++) {
774 printf("%s%06o", i ? "," : "",
775 elem->parent[i].mode);
776 }
777 if (elem->mode)
778 printf("..%06o", elem->mode);
779 }
780 printf("%s\n", c_reset);
781 }
782 if (added)
783 dump_quoted_path("--- /dev/", "null", c_meta, c_reset);
784 else
785 dump_quoted_path("--- a/", elem->path, c_meta, c_reset);
786 if (deleted)
787 dump_quoted_path("+++ /dev/", "null", c_meta, c_reset);
788 else
789 dump_quoted_path("+++ b/", elem->path, c_meta, c_reset);
790 dump_sline(sline, cnt, num_parent, opt->color_diff);
791 }
792 free(result);
793 for (lno = 0; lno < cnt; lno++) {
795 if (sline[lno].lost_head) {
796 struct lline *ll = sline[lno].lost_head;
797 while (ll) {
798 struct lline *tmp = ll;
799 ll = ll->next;
800 free(tmp);
801 }
802 }
803 }
804 free(sline[0].p_lno);
805 free(sline);
806}
807#define COLONS "::::::::::::::::::::::::::::::::"
809static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct rev_info *rev)
811{
812 struct diff_options *opt = &rev->diffopt;
813 int i, offset;
814 const char *prefix;
815 int line_termination, inter_name_termination;
816 line_termination = opt->line_termination;
818 inter_name_termination = '\t';
819 if (!line_termination)
820 inter_name_termination = 0;
821 if (rev->loginfo && !rev->no_commit_id)
823 show_log(rev, opt->msg_sep);
824 if (opt->output_format & DIFF_FORMAT_RAW) {
826 offset = strlen(COLONS) - num_parent;
827 if (offset < 0)
828 offset = 0;
829 prefix = COLONS + offset;
830 /* Show the modes */
832 for (i = 0; i < num_parent; i++) {
833 printf("%s%06o", prefix, p->parent[i].mode);
834 prefix = " ";
835 }
836 printf("%s%06o", prefix, p->mode);
837 /* Show sha1's */
839 for (i = 0; i < num_parent; i++)
840 printf(" %s", diff_unique_abbrev(p->parent[i].sha1,
841 opt->abbrev));
842 printf(" %s ", diff_unique_abbrev(p->sha1, opt->abbrev));
843 }
844 if (opt->output_format & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) {
846 for (i = 0; i < num_parent; i++)
847 putchar(p->parent[i].status);
848 putchar(inter_name_termination);
849 }
850 if (line_termination) {
852 if (quote_c_style(p->path, NULL, NULL, 0))
853 quote_c_style(p->path, NULL, stdout, 0);
854 else
855 printf("%s", p->path);
856 putchar(line_termination);
857 }
858 else {
859 printf("%s%c", p->path, line_termination);
860 }
861}
862void show_combined_diff(struct combine_diff_path *p,
864 int num_parent,
865 int dense,
866 struct rev_info *rev)
867{
868 struct diff_options *opt = &rev->diffopt;
869 if (!p->len)
870 return;
871 if (opt->output_format & (DIFF_FORMAT_RAW |
872 DIFF_FORMAT_NAME |
873 DIFF_FORMAT_NAME_STATUS))
874 show_raw_diff(p, num_parent, rev);
875 else if (opt->output_format & DIFF_FORMAT_PATCH)
876 show_patch_diff(p, num_parent, dense, rev);
877}
878void diff_tree_combined(const unsigned char *sha1,
880 const unsigned char parent[][20],
881 int num_parent,
882 int dense,
883 struct rev_info *rev)
884{
885 struct diff_options *opt = &rev->diffopt;
886 struct diff_options diffopts;
887 struct combine_diff_path *p, *paths = NULL;
888 int i, num_paths, needsep, show_log_first;
889 diffopts = *opt;
891 diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
892 diffopts.recursive = 1;
893 show_log_first = !!rev->loginfo && !rev->no_commit_id;
895 needsep = 0;
896 /* find set of paths that everybody touches */
897 for (i = 0; i < num_parent; i++) {
898 /* show stat against the first parent even
899 * when doing combined diff.
900 */
901 if (i == 0 && opt->output_format & DIFF_FORMAT_DIFFSTAT)
902 diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
903 else
904 diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
905 diff_tree_sha1(parent[i], sha1, "", &diffopts);
906 diffcore_std(&diffopts);
907 paths = intersect_paths(paths, i, num_parent);
908 if (show_log_first && i == 0) {
910 show_log(rev, opt->msg_sep);
911 if (rev->verbose_header && opt->output_format)
912 putchar(opt->line_termination);
913 }
914 diff_flush(&diffopts);
915 }
916 /* find out surviving paths */
918 for (num_paths = 0, p = paths; p; p = p->next) {
919 if (p->len)
920 num_paths++;
921 }
922 if (num_paths) {
923 if (opt->output_format & (DIFF_FORMAT_RAW |
924 DIFF_FORMAT_NAME |
925 DIFF_FORMAT_NAME_STATUS)) {
926 for (p = paths; p; p = p->next) {
927 if (p->len)
928 show_raw_diff(p, num_parent, rev);
929 }
930 needsep = 1;
931 }
932 else if (opt->output_format & DIFF_FORMAT_DIFFSTAT)
933 needsep = 1;
934 if (opt->output_format & DIFF_FORMAT_PATCH) {
935 if (needsep)
936 putchar(opt->line_termination);
937 for (p = paths; p; p = p->next) {
938 if (p->len)
939 show_patch_diff(p, num_parent, dense,
940 rev);
941 }
942 }
943 }
944 /* Clean things up */
946 while (paths) {
947 struct combine_diff_path *tmp = paths;
948 paths = paths->next;
949 free(tmp);
950 }
951}
952void diff_tree_combined_merge(const unsigned char *sha1,
954 int dense, struct rev_info *rev)
955{
956 int num_parent;
957 const unsigned char (*parent)[20];
958 struct commit *commit = lookup_commit(sha1);
959 struct commit_list *parents;
960 /* count parents */
962 for (parents = commit->parents, num_parent = 0;
963 parents;
964 parents = parents->next, num_parent++)
965 ; /* nothing */
966 parent = xmalloc(num_parent * sizeof(*parent));
968 for (parents = commit->parents, num_parent = 0;
969 parents;
970 parents = parents->next, num_parent++)
971 hashcpy((unsigned char*)(parent + num_parent),
972 parents->item->object.sha1);
973 diff_tree_combined(sha1, parent, num_parent, dense, rev);
974}