Bug Summary

File:revision.c
Location:line 768, column 8
Description:Access to field 'parents' results in a dereference of a null pointer (loaded from variable 'p')

Annotated Source Code

1#include "cache.h"
2#include "tag.h"
3#include "blob.h"
4#include "tree.h"
5#include "commit.h"
6#include "diff.h"
7#include "refs.h"
8#include "revision.h"
9#include "graph.h"
10#include "grep.h"
11#include "reflog-walk.h"
12#include "patch-ids.h"
13#include "decorate.h"
14#include "log-tree.h"
15#include "string-list.h"
16#include "line-log.h"
17#include "mailmap.h"
18#include "commit-slab.h"
19#include "dir.h"
20#include "cache-tree.h"
21#include "bisect.h"
22
23volatile show_early_output_fn_t show_early_output;
24
25static const char *term_bad;
26static const char *term_good;
27
28void show_object_with_name(FILE *out, struct object *obj, const char *name)
29{
30 const char *p;
31
32 fprintf(out, "%s ", oid_to_hex(&obj->oid));
33 for (p = name; *p && *p != '\n'; p++)
34 fputc(*p, out);
35 fputc('\n', out);
36}
37
38static void mark_blob_uninteresting(struct blob *blob)
39{
40 if (!blob)
41 return;
42 if (blob->object.flags & UNINTERESTING(1u<<1))
43 return;
44 blob->object.flags |= UNINTERESTING(1u<<1);
45}
46
47static void mark_tree_contents_uninteresting(struct tree *tree)
48{
49 struct tree_desc desc;
50 struct name_entry entry;
51 struct object *obj = &tree->object;
52
53 if (!has_object_file(&obj->oid))
54 return;
55 if (parse_tree(tree) < 0)
56 die("bad tree %s", oid_to_hex(&obj->oid));
57
58 init_tree_desc(&desc, tree->buffer, tree->size);
59 while (tree_entry(&desc, &entry)) {
60 switch (object_type(entry.mode)) {
61 case OBJ_TREE:
62 mark_tree_uninteresting(lookup_tree(entry.oid->hash));
63 break;
64 case OBJ_BLOB:
65 mark_blob_uninteresting(lookup_blob(entry.oid->hash));
66 break;
67 default:
68 /* Subproject commit - not in this repository */
69 break;
70 }
71 }
72
73 /*
74 * We don't care about the tree any more
75 * after it has been marked uninteresting.
76 */
77 free_tree_buffer(tree);
78}
79
80void mark_tree_uninteresting(struct tree *tree)
81{
82 struct object *obj;
83
84 if (!tree)
85 return;
86
87 obj = &tree->object;
88 if (obj->flags & UNINTERESTING(1u<<1))
89 return;
90 obj->flags |= UNINTERESTING(1u<<1);
91 mark_tree_contents_uninteresting(tree);
92}
93
94void mark_parents_uninteresting(struct commit *commit)
95{
96 struct commit_list *parents = NULL((void*)0), *l;
97
98 for (l = commit->parents; l; l = l->next)
99 commit_list_insert(l->item, &parents);
100
101 while (parents) {
102 struct commit *commit = pop_commit(&parents);
103
104 while (commit) {
105 /*
106 * A missing commit is ok iff its parent is marked
107 * uninteresting.
108 *
109 * We just mark such a thing parsed, so that when
110 * it is popped next time around, we won't be trying
111 * to parse it and get an error.
112 */
113 if (!has_object_file(&commit->object.oid))
114 commit->object.parsed = 1;
115
116 if (commit->object.flags & UNINTERESTING(1u<<1))
117 break;
118
119 commit->object.flags |= UNINTERESTING(1u<<1);
120
121 /*
122 * Normally we haven't parsed the parent
123 * yet, so we won't have a parent of a parent
124 * here. However, it may turn out that we've
125 * reached this commit some other way (where it
126 * wasn't uninteresting), in which case we need
127 * to mark its parents recursively too..
128 */
129 if (!commit->parents)
130 break;
131
132 for (l = commit->parents->next; l; l = l->next)
133 commit_list_insert(l->item, &parents);
134 commit = commit->parents->item;
135 }
136 }
137}
138
139static void add_pending_object_with_path(struct rev_info *revs,
140 struct object *obj,
141 const char *name, unsigned mode,
142 const char *path)
143{
144 if (!obj)
145 return;
146 if (revs->no_walk && (obj->flags & UNINTERESTING(1u<<1)))
147 revs->no_walk = 0;
148 if (revs->reflog_info && obj->type == OBJ_COMMIT) {
149 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
150 int len = interpret_branch_name(name, 0, &buf);
151 int st;
152
153 if (0 < len && name[len] && buf.len)
154 strbuf_addstr(&buf, name + len);
155 st = add_reflog_for_walk(revs->reflog_info,
156 (struct commit *)obj,
157 buf.buf[0] ? buf.buf: name);
158 strbuf_release(&buf);
159 if (st)
160 return;
161 }
162 add_object_array_with_path(obj, name, &revs->pending, mode, path);
163}
164
165static void add_pending_object_with_mode(struct rev_info *revs,
166 struct object *obj,
167 const char *name, unsigned mode)
168{
169 add_pending_object_with_path(revs, obj, name, mode, NULL((void*)0));
170}
171
172void add_pending_object(struct rev_info *revs,
173 struct object *obj, const char *name)
174{
175 add_pending_object_with_mode(revs, obj, name, S_IFINVALID0030000);
176}
177
178void add_head_to_pending(struct rev_info *revs)
179{
180 unsigned char sha1[20];
181 struct object *obj;
182 if (get_sha1("HEAD", sha1))
183 return;
184 obj = parse_object(sha1);
185 if (!obj)
186 return;
187 add_pending_object(revs, obj, "HEAD");
188}
189
190static struct object *get_reference(struct rev_info *revs, const char *name,
191 const unsigned char *sha1,
192 unsigned int flags)
193{
194 struct object *object;
195
196 object = parse_object(sha1);
197 if (!object) {
198 if (revs->ignore_missing)
199 return object;
200 die("bad object %s", name);
201 }
202 object->flags |= flags;
203 return object;
204}
205
206void add_pending_sha1(struct rev_info *revs, const char *name,
207 const unsigned char *sha1, unsigned int flags)
208{
209 struct object *object = get_reference(revs, name, sha1, flags);
210 add_pending_object(revs, object, name);
211}
212
213static struct commit *handle_commit(struct rev_info *revs,
214 struct object_array_entry *entry)
215{
216 struct object *object = entry->item;
217 const char *name = entry->name;
218 const char *path = entry->path;
219 unsigned int mode = entry->mode;
220 unsigned long flags = object->flags;
221
222 /*
223 * Tag object? Look what it points to..
224 */
225 while (object->type == OBJ_TAG) {
226 struct tag *tag = (struct tag *) object;
227 if (revs->tag_objects && !(flags & UNINTERESTING(1u<<1)))
228 add_pending_object(revs, object, tag->tag);
229 if (!tag->tagged)
230 die("bad tag");
231 object = parse_object(tag->tagged->oid.hash);
232 if (!object) {
233 if (flags & UNINTERESTING(1u<<1))
234 return NULL((void*)0);
235 die("bad object %s", oid_to_hex(&tag->tagged->oid));
236 }
237 object->flags |= flags;
238 /*
239 * We'll handle the tagged object by looping or dropping
240 * through to the non-tag handlers below. Do not
241 * propagate path data from the tag's pending entry.
242 */
243 path = NULL((void*)0);
244 mode = 0;
245 }
246
247 /*
248 * Commit object? Just return it, we'll do all the complex
249 * reachability crud.
250 */
251 if (object->type == OBJ_COMMIT) {
252 struct commit *commit = (struct commit *)object;
253 if (parse_commit(commit) < 0)
254 die("unable to parse commit %s", name);
255 if (flags & UNINTERESTING(1u<<1)) {
256 mark_parents_uninteresting(commit);
257 revs->limited = 1;
258 }
259 if (revs->show_source && !commit->util)
260 commit->util = xstrdup(name);
261 return commit;
262 }
263
264 /*
265 * Tree object? Either mark it uninteresting, or add it
266 * to the list of objects to look at later..
267 */
268 if (object->type == OBJ_TREE) {
269 struct tree *tree = (struct tree *)object;
270 if (!revs->tree_objects)
271 return NULL((void*)0);
272 if (flags & UNINTERESTING(1u<<1)) {
273 mark_tree_contents_uninteresting(tree);
274 return NULL((void*)0);
275 }
276 add_pending_object_with_path(revs, object, name, mode, path);
277 return NULL((void*)0);
278 }
279
280 /*
281 * Blob object? You know the drill by now..
282 */
283 if (object->type == OBJ_BLOB) {
284 if (!revs->blob_objects)
285 return NULL((void*)0);
286 if (flags & UNINTERESTING(1u<<1))
287 return NULL((void*)0);
288 add_pending_object_with_path(revs, object, name, mode, path);
289 return NULL((void*)0);
290 }
291 die("%s is unknown object", name);
292}
293
294static int everybody_uninteresting(struct commit_list *orig,
295 struct commit **interesting_cache)
296{
297 struct commit_list *list = orig;
298
299 if (*interesting_cache) {
300 struct commit *commit = *interesting_cache;
301 if (!(commit->object.flags & UNINTERESTING(1u<<1)))
302 return 0;
303 }
304
305 while (list) {
306 struct commit *commit = list->item;
307 list = list->next;
308 if (commit->object.flags & UNINTERESTING(1u<<1))
309 continue;
310
311 *interesting_cache = commit;
312 return 0;
313 }
314 return 1;
315}
316
317/*
318 * A definition of "relevant" commit that we can use to simplify limited graphs
319 * by eliminating side branches.
320 *
321 * A "relevant" commit is one that is !UNINTERESTING (ie we are including it
322 * in our list), or that is a specified BOTTOM commit. Then after computing
323 * a limited list, during processing we can generally ignore boundary merges
324 * coming from outside the graph, (ie from irrelevant parents), and treat
325 * those merges as if they were single-parent. TREESAME is defined to consider
326 * only relevant parents, if any. If we are TREESAME to our on-graph parents,
327 * we don't care if we were !TREESAME to non-graph parents.
328 *
329 * Treating bottom commits as relevant ensures that a limited graph's
330 * connection to the actual bottom commit is not viewed as a side branch, but
331 * treated as part of the graph. For example:
332 *
333 * ....Z...A---X---o---o---B
334 * . /
335 * W---Y
336 *
337 * When computing "A..B", the A-X connection is at least as important as
338 * Y-X, despite A being flagged UNINTERESTING.
339 *
340 * And when computing --ancestry-path "A..B", the A-X connection is more
341 * important than Y-X, despite both A and Y being flagged UNINTERESTING.
342 */
343static inline int relevant_commit(struct commit *commit)
344{
345 return (commit->object.flags & (UNINTERESTING(1u<<1) | BOTTOM(1u<<10))) != UNINTERESTING(1u<<1);
346}
347
348/*
349 * Return a single relevant commit from a parent list. If we are a TREESAME
350 * commit, and this selects one of our parents, then we can safely simplify to
351 * that parent.
352 */
353static struct commit *one_relevant_parent(const struct rev_info *revs,
354 struct commit_list *orig)
355{
356 struct commit_list *list = orig;
357 struct commit *relevant = NULL((void*)0);
358
359 if (!orig)
360 return NULL((void*)0);
361
362 /*
363 * For 1-parent commits, or if first-parent-only, then return that
364 * first parent (even if not "relevant" by the above definition).
365 * TREESAME will have been set purely on that parent.
366 */
367 if (revs->first_parent_only || !orig->next)
368 return orig->item;
369
370 /*
371 * For multi-parent commits, identify a sole relevant parent, if any.
372 * If we have only one relevant parent, then TREESAME will be set purely
373 * with regard to that parent, and we can simplify accordingly.
374 *
375 * If we have more than one relevant parent, or no relevant parents
376 * (and multiple irrelevant ones), then we can't select a parent here
377 * and return NULL.
378 */
379 while (list) {
380 struct commit *commit = list->item;
381 list = list->next;
382 if (relevant_commit(commit)) {
383 if (relevant)
384 return NULL((void*)0);
385 relevant = commit;
386 }
387 }
388 return relevant;
389}
390
391/*
392 * The goal is to get REV_TREE_NEW as the result only if the
393 * diff consists of all '+' (and no other changes), REV_TREE_OLD
394 * if the whole diff is removal of old data, and otherwise
395 * REV_TREE_DIFFERENT (of course if the trees are the same we
396 * want REV_TREE_SAME).
397 * That means that once we get to REV_TREE_DIFFERENT, we do not
398 * have to look any further.
399 */
400static int tree_difference = REV_TREE_SAME0;
401
402static void file_add_remove(struct diff_options *options,
403 int addremove, unsigned mode,
404 const unsigned char *sha1,
405 int sha1_valid,
406 const char *fullpath, unsigned dirty_submodule)
407{
408 int diff = addremove == '+' ? REV_TREE_NEW1 : REV_TREE_OLD2;
409
410 tree_difference |= diff;
411 if (tree_difference == REV_TREE_DIFFERENT3)
412 DIFF_OPT_SET(options, HAS_CHANGES)(((options)->flags |= (1 << 10)),((options)->touched_flags
|= (1 << 10)));
413}
414
415static void file_change(struct diff_options *options,
416 unsigned old_mode, unsigned new_mode,
417 const unsigned char *old_sha1,
418 const unsigned char *new_sha1,
419 int old_sha1_valid, int new_sha1_valid,
420 const char *fullpath,
421 unsigned old_dirty_submodule, unsigned new_dirty_submodule)
422{
423 tree_difference = REV_TREE_DIFFERENT3;
424 DIFF_OPT_SET(options, HAS_CHANGES)(((options)->flags |= (1 << 10)),((options)->touched_flags
|= (1 << 10)));
425}
426
427static int rev_compare_tree(struct rev_info *revs,
428 struct commit *parent, struct commit *commit)
429{
430 struct tree *t1 = parent->tree;
431 struct tree *t2 = commit->tree;
432
433 if (!t1)
434 return REV_TREE_NEW1;
435 if (!t2)
436 return REV_TREE_OLD2;
437
438 if (revs->simplify_by_decoration) {
439 /*
440 * If we are simplifying by decoration, then the commit
441 * is worth showing if it has a tag pointing at it.
442 */
443 if (get_name_decoration(&commit->object))
444 return REV_TREE_DIFFERENT3;
445 /*
446 * A commit that is not pointed by a tag is uninteresting
447 * if we are not limited by path. This means that you will
448 * see the usual "commits that touch the paths" plus any
449 * tagged commit by specifying both --simplify-by-decoration
450 * and pathspec.
451 */
452 if (!revs->prune_data.nr)
453 return REV_TREE_SAME0;
454 }
455
456 tree_difference = REV_TREE_SAME0;
457 DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES)(((&revs->pruning)->flags &= ~(1 << 10)),
((&revs->pruning)->touched_flags |= (1 << 10)
));
458 if (diff_tree_sha1(t1->object.oid.hash, t2->object.oid.hash, "",
459 &revs->pruning) < 0)
460 return REV_TREE_DIFFERENT3;
461 return tree_difference;
462}
463
464static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
465{
466 int retval;
467 struct tree *t1 = commit->tree;
468
469 if (!t1)
470 return 0;
471
472 tree_difference = REV_TREE_SAME0;
473 DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES)(((&revs->pruning)->flags &= ~(1 << 10)),
((&revs->pruning)->touched_flags |= (1 << 10)
));
474 retval = diff_tree_sha1(NULL((void*)0), t1->object.oid.hash, "", &revs->pruning);
475
476 return retval >= 0 && (tree_difference == REV_TREE_SAME0);
477}
478
479struct treesame_state {
480 unsigned int nparents;
481 unsigned char treesame[FLEX_ARRAY];
482};
483
484static struct treesame_state *initialise_treesame(struct rev_info *revs, struct commit *commit)
485{
486 unsigned n = commit_list_count(commit->parents);
487 struct treesame_state *st = xcalloc(1, st_add(sizeof(*st), n));
488 st->nparents = n;
489 add_decoration(&revs->treesame, &commit->object, st);
490 return st;
491}
492
493/*
494 * Must be called immediately after removing the nth_parent from a commit's
495 * parent list, if we are maintaining the per-parent treesame[] decoration.
496 * This does not recalculate the master TREESAME flag - update_treesame()
497 * should be called to update it after a sequence of treesame[] modifications
498 * that may have affected it.
499 */
500static int compact_treesame(struct rev_info *revs, struct commit *commit, unsigned nth_parent)
501{
502 struct treesame_state *st;
503 int old_same;
504
505 if (!commit->parents) {
506 /*
507 * Have just removed the only parent from a non-merge.
508 * Different handling, as we lack decoration.
509 */
510 if (nth_parent != 0)
511 die("compact_treesame %u", nth_parent);
512 old_same = !!(commit->object.flags & TREESAME(1u<<2));
513 if (rev_same_tree_as_empty(revs, commit))
514 commit->object.flags |= TREESAME(1u<<2);
515 else
516 commit->object.flags &= ~TREESAME(1u<<2);
517 return old_same;
518 }
519
520 st = lookup_decoration(&revs->treesame, &commit->object);
521 if (!st || nth_parent >= st->nparents)
522 die("compact_treesame %u", nth_parent);
523
524 old_same = st->treesame[nth_parent];
525 memmove(st->treesame + nth_parent,__builtin___memmove_chk (st->treesame + nth_parent, st->
treesame + nth_parent + 1, st->nparents - nth_parent - 1, __builtin_object_size
(st->treesame + nth_parent, 0))
526 st->treesame + nth_parent + 1,__builtin___memmove_chk (st->treesame + nth_parent, st->
treesame + nth_parent + 1, st->nparents - nth_parent - 1, __builtin_object_size
(st->treesame + nth_parent, 0))
527 st->nparents - nth_parent - 1)__builtin___memmove_chk (st->treesame + nth_parent, st->
treesame + nth_parent + 1, st->nparents - nth_parent - 1, __builtin_object_size
(st->treesame + nth_parent, 0));
528
529 /*
530 * If we've just become a non-merge commit, update TREESAME
531 * immediately, and remove the no-longer-needed decoration.
532 * If still a merge, defer update until update_treesame().
533 */
534 if (--st->nparents == 1) {
535 if (commit->parents->next)
536 die("compact_treesame parents mismatch");
537 if (st->treesame[0] && revs->dense)
538 commit->object.flags |= TREESAME(1u<<2);
539 else
540 commit->object.flags &= ~TREESAME(1u<<2);
541 free(add_decoration(&revs->treesame, &commit->object, NULL((void*)0)));
542 }
543
544 return old_same;
545}
546
547static unsigned update_treesame(struct rev_info *revs, struct commit *commit)
548{
549 if (commit->parents && commit->parents->next) {
550 unsigned n;
551 struct treesame_state *st;
552 struct commit_list *p;
553 unsigned relevant_parents;
554 unsigned relevant_change, irrelevant_change;
555
556 st = lookup_decoration(&revs->treesame, &commit->object);
557 if (!st)
558 die("update_treesame %s", oid_to_hex(&commit->object.oid));
559 relevant_parents = 0;
560 relevant_change = irrelevant_change = 0;
561 for (p = commit->parents, n = 0; p; n++, p = p->next) {
562 if (relevant_commit(p->item)) {
563 relevant_change |= !st->treesame[n];
564 relevant_parents++;
565 } else
566 irrelevant_change |= !st->treesame[n];
567 }
568 if (relevant_parents ? relevant_change : irrelevant_change)
569 commit->object.flags &= ~TREESAME(1u<<2);
570 else
571 commit->object.flags |= TREESAME(1u<<2);
572 }
573
574 return commit->object.flags & TREESAME(1u<<2);
575}
576
577static inline int limiting_can_increase_treesame(const struct rev_info *revs)
578{
579 /*
580 * TREESAME is irrelevant unless prune && dense;
581 * if simplify_history is set, we can't have a mixture of TREESAME and
582 * !TREESAME INTERESTING parents (and we don't have treesame[]
583 * decoration anyway);
584 * if first_parent_only is set, then the TREESAME flag is locked
585 * against the first parent (and again we lack treesame[] decoration).
586 */
587 return revs->prune && revs->dense &&
588 !revs->simplify_history &&
589 !revs->first_parent_only;
590}
591
592static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
593{
594 struct commit_list **pp, *parent;
595 struct treesame_state *ts = NULL((void*)0);
596 int relevant_change = 0, irrelevant_change = 0;
597 int relevant_parents, nth_parent;
598
599 /*
600 * If we don't do pruning, everything is interesting
601 */
602 if (!revs->prune)
603 return;
604
605 if (!commit->tree)
606 return;
607
608 if (!commit->parents) {
609 if (rev_same_tree_as_empty(revs, commit))
610 commit->object.flags |= TREESAME(1u<<2);
611 return;
612 }
613
614 /*
615 * Normal non-merge commit? If we don't want to make the
616 * history dense, we consider it always to be a change..
617 */
618 if (!revs->dense && !commit->parents->next)
619 return;
620
621 for (pp = &commit->parents, nth_parent = 0, relevant_parents = 0;
622 (parent = *pp) != NULL((void*)0);
623 pp = &parent->next, nth_parent++) {
624 struct commit *p = parent->item;
625 if (relevant_commit(p))
626 relevant_parents++;
627
628 if (nth_parent == 1) {
629 /*
630 * This our second loop iteration - so we now know
631 * we're dealing with a merge.
632 *
633 * Do not compare with later parents when we care only about
634 * the first parent chain, in order to avoid derailing the
635 * traversal to follow a side branch that brought everything
636 * in the path we are limited to by the pathspec.
637 */
638 if (revs->first_parent_only)
639 break;
640 /*
641 * If this will remain a potentially-simplifiable
642 * merge, remember per-parent treesame if needed.
643 * Initialise the array with the comparison from our
644 * first iteration.
645 */
646 if (revs->treesame.name &&
647 !revs->simplify_history &&
648 !(commit->object.flags & UNINTERESTING(1u<<1))) {
649 ts = initialise_treesame(revs, commit);
650 if (!(irrelevant_change || relevant_change))
651 ts->treesame[0] = 1;
652 }
653 }
654 if (parse_commit(p) < 0)
655 die("cannot simplify commit %s (because of %s)",
656 oid_to_hex(&commit->object.oid),
657 oid_to_hex(&p->object.oid));
658 switch (rev_compare_tree(revs, p, commit)) {
659 case REV_TREE_SAME0:
660 if (!revs->simplify_history || !relevant_commit(p)) {
661 /* Even if a merge with an uninteresting
662 * side branch brought the entire change
663 * we are interested in, we do not want
664 * to lose the other branches of this
665 * merge, so we just keep going.
666 */
667 if (ts)
668 ts->treesame[nth_parent] = 1;
669 continue;
670 }
671 parent->next = NULL((void*)0);
672 commit->parents = parent;
673 commit->object.flags |= TREESAME(1u<<2);
674 return;
675
676 case REV_TREE_NEW1:
677 if (revs->remove_empty_trees &&
678 rev_same_tree_as_empty(revs, p)) {
679 /* We are adding all the specified
680 * paths from this parent, so the
681 * history beyond this parent is not
682 * interesting. Remove its parents
683 * (they are grandparents for us).
684 * IOW, we pretend this parent is a
685 * "root" commit.
686 */
687 if (parse_commit(p) < 0)
688 die("cannot simplify commit %s (invalid %s)",
689 oid_to_hex(&commit->object.oid),
690 oid_to_hex(&p->object.oid));
691 p->parents = NULL((void*)0);
692 }
693 /* fallthrough */
694 case REV_TREE_OLD2:
695 case REV_TREE_DIFFERENT3:
696 if (relevant_commit(p))
697 relevant_change = 1;
698 else
699 irrelevant_change = 1;
700 continue;
701 }
702 die("bad tree compare for commit %s", oid_to_hex(&commit->object.oid));
703 }
704
705 /*
706 * TREESAME is straightforward for single-parent commits. For merge
707 * commits, it is most useful to define it so that "irrelevant"
708 * parents cannot make us !TREESAME - if we have any relevant
709 * parents, then we only consider TREESAMEness with respect to them,
710 * allowing irrelevant merges from uninteresting branches to be
711 * simplified away. Only if we have only irrelevant parents do we
712 * base TREESAME on them. Note that this logic is replicated in
713 * update_treesame, which should be kept in sync.
714 */
715 if (relevant_parents ? !relevant_change : !irrelevant_change)
716 commit->object.flags |= TREESAME(1u<<2);
717}
718
719static void commit_list_insert_by_date_cached(struct commit *p, struct commit_list **head,
720 struct commit_list *cached_base, struct commit_list **cache)
721{
722 struct commit_list *new_entry;
723
724 if (cached_base && p->date < cached_base->item->date)
725 new_entry = commit_list_insert_by_date(p, &cached_base->next);
726 else
727 new_entry = commit_list_insert_by_date(p, head);
728
729 if (cache && (!*cache || p->date < (*cache)->item->date))
730 *cache = new_entry;
731}
732
733static int add_parents_to_list(struct rev_info *revs, struct commit *commit,
734 struct commit_list **list, struct commit_list **cache_ptr)
735{
736 struct commit_list *parent = commit->parents;
737 unsigned left_flag;
738 struct commit_list *cached_base = cache_ptr ? *cache_ptr : NULL((void*)0);
22
←
'?' condition is true
→
739
740 if (commit->object.flags & ADDED(1u<<7))
23
←
Taking false branch
→
741 return 0;
742 commit->object.flags |= ADDED(1u<<7);
743
744 if (revs->include_check &&
745 !revs->include_check(commit, revs->include_check_data))
746 return 0;
747
748 /*
749 * If the commit is uninteresting, don't try to
750 * prune parents - we want the maximal uninteresting
751 * set.
752 *
753 * Normally we haven't parsed the parent
754 * yet, so we won't have a parent of a parent
755 * here. However, it may turn out that we've
756 * reached this commit some other way (where it
757 * wasn't uninteresting), in which case we need
758 * to mark its parents recursively too..
759 */
760 if (commit->object.flags & UNINTERESTING(1u<<1)) {
24
←
Taking true branch
→
761 while (parent) {
25
←
Loop condition is true. Entering loop body
→
762 struct commit *p = parent->item;
26
←
'p' initialized here
→
763 parent = parent->next;
764 if (p)
27
←
Assuming 'p' is null
→
28
←
Taking false branch
→
765 p->object.flags |= UNINTERESTING(1u<<1);
766 if (parse_commit_gently(p, 1) < 0)
29
←
Taking false branch
→
767 continue;
768 if (p->parents)
30
←
Access to field 'parents' results in a dereference of a null pointer (loaded from variable 'p')
769 mark_parents_uninteresting(p);
770 if (p->object.flags & SEEN(1u<<0))
771 continue;
772 p->object.flags |= SEEN(1u<<0);
773 commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
774 }
775 return 0;
776 }
777
778 /*
779 * Ok, the commit wasn't uninteresting. Try to
780 * simplify the commit history and find the parent
781 * that has no differences in the path set if one exists.
782 */
783 try_to_simplify_commit(revs, commit);
784
785 if (revs->no_walk)
786 return 0;
787
788 left_flag = (commit->object.flags & SYMMETRIC_LEFT(1u<<8));
789
790 for (parent = commit->parents; parent; parent = parent->next) {
791 struct commit *p = parent->item;
792
793 if (parse_commit_gently(p, revs->ignore_missing_links) < 0)
794 return -1;
795 if (revs->show_source && !p->util)
796 p->util = commit->util;
797 p->object.flags |= left_flag;
798 if (!(p->object.flags & SEEN(1u<<0))) {
799 p->object.flags |= SEEN(1u<<0);
800 commit_list_insert_by_date_cached(p, list, cached_base, cache_ptr);
801 }
802 if (revs->first_parent_only)
803 break;
804 }
805 return 0;
806}
807
808static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
809{
810 struct commit_list *p;
811 int left_count = 0, right_count = 0;
812 int left_first;
813 struct patch_ids ids;
814 unsigned cherry_flag;
815
816 /* First count the commits on the left and on the right */
817 for (p = list; p; p = p->next) {
818 struct commit *commit = p->item;
819 unsigned flags = commit->object.flags;
820 if (flags & BOUNDARY(1u<<5))
821 ;
822 else if (flags & SYMMETRIC_LEFT(1u<<8))
823 left_count++;
824 else
825 right_count++;
826 }
827
828 if (!left_count || !right_count)
829 return;
830
831 left_first = left_count < right_count;
832 init_patch_ids(&ids);
833 ids.diffopts.pathspec = revs->diffopt.pathspec;
834
835 /* Compute patch-ids for one side */
836 for (p = list; p; p = p->next) {
837 struct commit *commit = p->item;
838 unsigned flags = commit->object.flags;
839
840 if (flags & BOUNDARY(1u<<5))
841 continue;
842 /*
843 * If we have fewer left, left_first is set and we omit
844 * commits on the right branch in this loop. If we have
845 * fewer right, we skip the left ones.
846 */
847 if (left_first != !!(flags & SYMMETRIC_LEFT(1u<<8)))
848 continue;
849 add_commit_patch_id(commit, &ids);
850 }
851
852 /* either cherry_mark or cherry_pick are true */
853 cherry_flag = revs->cherry_mark ? PATCHSAME(1u<<9) : SHOWN(1u<<3);
854
855 /* Check the other side */
856 for (p = list; p; p = p->next) {
857 struct commit *commit = p->item;
858 struct patch_id *id;
859 unsigned flags = commit->object.flags;
860
861 if (flags & BOUNDARY(1u<<5))
862 continue;
863 /*
864 * If we have fewer left, left_first is set and we omit
865 * commits on the left branch in this loop.
866 */
867 if (left_first == !!(flags & SYMMETRIC_LEFT(1u<<8)))
868 continue;
869
870 /*
871 * Have we seen the same patch id?
872 */
873 id = has_commit_patch_id(commit, &ids);
874 if (!id)
875 continue;
876
877 commit->object.flags |= cherry_flag;
878 id->commit->object.flags |= cherry_flag;
879 }
880
881 free_patch_ids(&ids);
882}
883
884/* How many extra uninteresting commits we want to see.. */
885#define SLOP5 5
886
887static int still_interesting(struct commit_list *src, unsigned long date, int slop,
888 struct commit **interesting_cache)
889{
890 /*
891 * No source list at all? We're definitely done..
892 */
893 if (!src)
894 return 0;
895
896 /*
897 * Does the destination list contain entries with a date
898 * before the source list? Definitely _not_ done.
899 */
900 if (date <= src->item->date)
901 return SLOP5;
902
903 /*
904 * Does the source list still have interesting commits in
905 * it? Definitely not done..
906 */
907 if (!everybody_uninteresting(src, interesting_cache))
908 return SLOP5;
909
910 /* Ok, we're closing in.. */
911 return slop-1;
912}
913
914/*
915 * "rev-list --ancestry-path A..B" computes commits that are ancestors
916 * of B but not ancestors of A but further limits the result to those
917 * that are descendants of A. This takes the list of bottom commits and
918 * the result of "A..B" without --ancestry-path, and limits the latter
919 * further to the ones that can reach one of the commits in "bottom".
920 */
921static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *list)
922{
923 struct commit_list *p;
924 struct commit_list *rlist = NULL((void*)0);
925 int made_progress;
926
927 /*
928 * Reverse the list so that it will be likely that we would
929 * process parents before children.
930 */
931 for (p = list; p; p = p->next)
932 commit_list_insert(p->item, &rlist);
933
934 for (p = bottom; p; p = p->next)
935 p->item->object.flags |= TMP_MARK(1u<<4);
936
937 /*
938 * Mark the ones that can reach bottom commits in "list",
939 * in a bottom-up fashion.
940 */
941 do {
942 made_progress = 0;
943 for (p = rlist; p; p = p->next) {
944 struct commit *c = p->item;
945 struct commit_list *parents;
946 if (c->object.flags & (TMP_MARK(1u<<4) | UNINTERESTING(1u<<1)))
947 continue;
948 for (parents = c->parents;
949 parents;
950 parents = parents->next) {
951 if (!(parents->item->object.flags & TMP_MARK(1u<<4)))
952 continue;
953 c->object.flags |= TMP_MARK(1u<<4);
954 made_progress = 1;
955 break;
956 }
957 }
958 } while (made_progress);
959
960 /*
961 * NEEDSWORK: decide if we want to remove parents that are
962 * not marked with TMP_MARK from commit->parents for commits
963 * in the resulting list. We may not want to do that, though.
964 */
965
966 /*
967 * The ones that are not marked with TMP_MARK are uninteresting
968 */
969 for (p = list; p; p = p->next) {
970 struct commit *c = p->item;
971 if (c->object.flags & TMP_MARK(1u<<4))
972 continue;
973 c->object.flags |= UNINTERESTING(1u<<1);
974 }
975
976 /* We are done with the TMP_MARK */
977 for (p = list; p; p = p->next)
978 p->item->object.flags &= ~TMP_MARK(1u<<4);
979 for (p = bottom; p; p = p->next)
980 p->item->object.flags &= ~TMP_MARK(1u<<4);
981 free_commit_list(rlist);
982}
983
984/*
985 * Before walking the history, keep the set of "negative" refs the
986 * caller has asked to exclude.
987 *
988 * This is used to compute "rev-list --ancestry-path A..B", as we need
989 * to filter the result of "A..B" further to the ones that can actually
990 * reach A.
991 */
992static struct commit_list *collect_bottom_commits(struct commit_list *list)
993{
994 struct commit_list *elem, *bottom = NULL((void*)0);
995 for (elem = list; elem; elem = elem->next)
996 if (elem->item->object.flags & BOTTOM(1u<<10))
997 commit_list_insert(elem->item, &bottom);
998 return bottom;
999}
1000
1001/* Assumes either left_only or right_only is set */
1002static void limit_left_right(struct commit_list *list, struct rev_info *revs)
1003{
1004 struct commit_list *p;
1005
1006 for (p = list; p; p = p->next) {
1007 struct commit *commit = p->item;
1008
1009 if (revs->right_only) {
1010 if (commit->object.flags & SYMMETRIC_LEFT(1u<<8))
1011 commit->object.flags |= SHOWN(1u<<3);
1012 } else /* revs->left_only is set */
1013 if (!(commit->object.flags & SYMMETRIC_LEFT(1u<<8)))
1014 commit->object.flags |= SHOWN(1u<<3);
1015 }
1016}
1017
1018static int limit_list(struct rev_info *revs)
1019{
1020 int slop = SLOP5;
1021 unsigned long date = ~0ul;
1022 struct commit_list *list = revs->commits;
1023 struct commit_list *newlist = NULL((void*)0);
1024 struct commit_list **p = &newlist;
1025 struct commit_list *bottom = NULL((void*)0);
1026 struct commit *interesting_cache = NULL((void*)0);
1027
1028 if (revs->ancestry_path) {
1029 bottom = collect_bottom_commits(list);
1030 if (!bottom)
1031 die("--ancestry-path given but there are no bottom commits");
1032 }
1033
1034 while (list) {
1035 struct commit *commit = pop_commit(&list);
1036 struct object *obj = &commit->object;
1037 show_early_output_fn_t show;
1038
1039 if (commit == interesting_cache)
1040 interesting_cache = NULL((void*)0);
1041
1042 if (revs->max_age != -1 && (commit->date < revs->max_age))
1043 obj->flags |= UNINTERESTING(1u<<1);
1044 if (add_parents_to_list(revs, commit, &list, NULL((void*)0)) < 0)
1045 return -1;
1046 if (obj->flags & UNINTERESTING(1u<<1)) {
1047 mark_parents_uninteresting(commit);
1048 if (revs->show_all)
1049 p = &commit_list_insert(commit, p)->next;
1050 slop = still_interesting(list, date, slop, &interesting_cache);
1051 if (slop)
1052 continue;
1053 /* If showing all, add the whole pending list to the end */
1054 if (revs->show_all)
1055 *p = list;
1056 break;
1057 }
1058 if (revs->min_age != -1 && (commit->date > revs->min_age))
1059 continue;
1060 date = commit->date;
1061 p = &commit_list_insert(commit, p)->next;
1062
1063 show = show_early_output;
1064 if (!show)
1065 continue;
1066
1067 show(revs, newlist);
1068 show_early_output = NULL((void*)0);
1069 }
1070 if (revs->cherry_pick || revs->cherry_mark)
1071 cherry_pick_list(newlist, revs);
1072
1073 if (revs->left_only || revs->right_only)
1074 limit_left_right(newlist, revs);
1075
1076 if (bottom) {
1077 limit_to_ancestry(bottom, newlist);
1078 free_commit_list(bottom);
1079 }
1080
1081 /*
1082 * Check if any commits have become TREESAME by some of their parents
1083 * becoming UNINTERESTING.
1084 */
1085 if (limiting_can_increase_treesame(revs))
1086 for (list = newlist; list; list = list->next) {
1087 struct commit *c = list->item;
1088 if (c->object.flags & (UNINTERESTING(1u<<1) | TREESAME(1u<<2)))
1089 continue;
1090 update_treesame(revs, c);
1091 }
1092
1093 revs->commits = newlist;
1094 return 0;
1095}
1096
1097/*
1098 * Add an entry to refs->cmdline with the specified information.
1099 * *name is copied.
1100 */
1101static void add_rev_cmdline(struct rev_info *revs,
1102 struct object *item,
1103 const char *name,
1104 int whence,
1105 unsigned flags)
1106{
1107 struct rev_cmdline_info *info = &revs->cmdline;
1108 int nr = info->nr;
1109
1110 ALLOC_GROW(info->rev, nr + 1, info->alloc)do { if ((nr + 1) > info->alloc) { if ((((info->alloc
)+16)*3/2) < (nr + 1)) info->alloc = (nr + 1); else info
->alloc = (((info->alloc)+16)*3/2); (info->rev) = xrealloc
((info->rev), st_mult(sizeof(*(info->rev)), (info->alloc
))); } } while (0);
1111 info->rev[nr].item = item;
1112 info->rev[nr].name = xstrdup(name);
1113 info->rev[nr].whence = whence;
1114 info->rev[nr].flags = flags;
1115 info->nr++;
1116}
1117
1118static void add_rev_cmdline_list(struct rev_info *revs,
1119 struct commit_list *commit_list,
1120 int whence,
1121 unsigned flags)
1122{
1123 while (commit_list) {
1124 struct object *object = &commit_list->item->object;
1125 add_rev_cmdline(revs, object, oid_to_hex(&object->oid),
1126 whence, flags);
1127 commit_list = commit_list->next;
1128 }
1129}
1130
1131struct all_refs_cb {
1132 int all_flags;
1133 int warned_bad_reflog;
1134 struct rev_info *all_revs;
1135 const char *name_for_errormsg;
1136};
1137
1138int ref_excluded(struct string_list *ref_excludes, const char *path)
1139{
1140 struct string_list_item *item;
1141
1142 if (!ref_excludes)
1143 return 0;
1144 for_each_string_list_item(item, ref_excludes)for (item = (ref_excludes)->items; item < (ref_excludes
)->items + (ref_excludes)->nr; ++item) {
1145 if (!wildmatch(item->string, path, 0, NULL((void*)0)))
1146 return 1;
1147 }
1148 return 0;
1149}
1150
1151static int handle_one_ref(const char *path, const struct object_id *oid,
1152 int flag, void *cb_data)
1153{
1154 struct all_refs_cb *cb = cb_data;
1155 struct object *object;
1156
1157 if (ref_excluded(cb->all_revs->ref_excludes, path))
1158 return 0;
1159
1160 object = get_reference(cb->all_revs, path, oid->hash, cb->all_flags);
1161 add_rev_cmdline(cb->all_revs, object, path, REV_CMD_REF, cb->all_flags);
1162 add_pending_sha1(cb->all_revs, path, oid->hash, cb->all_flags);
1163 return 0;
1164}
1165
1166static void init_all_refs_cb(struct all_refs_cb *cb, struct rev_info *revs,
1167 unsigned flags)
1168{
1169 cb->all_revs = revs;
1170 cb->all_flags = flags;
1171}
1172
1173void clear_ref_exclusion(struct string_list **ref_excludes_p)
1174{
1175 if (*ref_excludes_p) {
1176 string_list_clear(*ref_excludes_p, 0);
1177 free(*ref_excludes_p);
1178 }
1179 *ref_excludes_p = NULL((void*)0);
1180}
1181
1182void add_ref_exclusion(struct string_list **ref_excludes_p, const char *exclude)
1183{
1184 if (!*ref_excludes_p) {
1185 *ref_excludes_p = xcalloc(1, sizeof(**ref_excludes_p));
1186 (*ref_excludes_p)->strdup_strings = 1;
1187 }
1188 string_list_append(*ref_excludes_p, exclude);
1189}
1190
1191static void handle_refs(const char *submodule, struct rev_info *revs, unsigned flags,
1192 int (*for_each)(const char *, each_ref_fn, void *))
1193{
1194 struct all_refs_cb cb;
1195 init_all_refs_cb(&cb, revs, flags);
1196 for_each(submodule, handle_one_ref, &cb);
1197}
1198
1199static void handle_one_reflog_commit(unsigned char *sha1, void *cb_data)
1200{
1201 struct all_refs_cb *cb = cb_data;
1202 if (!is_null_sha1(sha1)) {
1203 struct object *o = parse_object(sha1);
1204 if (o) {
1205 o->flags |= cb->all_flags;
1206 /* ??? CMDLINEFLAGS ??? */
1207 add_pending_object(cb->all_revs, o, "");
1208 }
1209 else if (!cb->warned_bad_reflog) {
1210 warning("reflog of '%s' references pruned commits",
1211 cb->name_for_errormsg);
1212 cb->warned_bad_reflog = 1;
1213 }
1214 }
1215}
1216
1217static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
1218 const char *email, unsigned long timestamp, int tz,
1219 const char *message, void *cb_data)
1220{
1221 handle_one_reflog_commit(osha1, cb_data);
1222 handle_one_reflog_commit(nsha1, cb_data);
1223 return 0;
1224}
1225
1226static int handle_one_reflog(const char *path, const struct object_id *oid,
1227 int flag, void *cb_data)
1228{
1229 struct all_refs_cb *cb = cb_data;
1230 cb->warned_bad_reflog = 0;
1231 cb->name_for_errormsg = path;
1232 for_each_reflog_ent(path, handle_one_reflog_ent, cb_data);
1233 return 0;
1234}
1235
1236void add_reflogs_to_pending(struct rev_info *revs, unsigned flags)
1237{
1238 struct all_refs_cb cb;
1239
1240 cb.all_revs = revs;
1241 cb.all_flags = flags;
1242 for_each_reflog(handle_one_reflog, &cb);
1243}
1244
1245static void add_cache_tree(struct cache_tree *it, struct rev_info *revs,
1246 struct strbuf *path)
1247{
1248 size_t baselen = path->len;
1249 int i;
1250
1251 if (it->entry_count >= 0) {
1252 struct tree *tree = lookup_tree(it->sha1);
1253 add_pending_object_with_path(revs, &tree->object, "",
1254 040000, path->buf);
1255 }
1256
1257 for (i = 0; i < it->subtree_nr; i++) {
1258 struct cache_tree_sub *sub = it->down[i];
1259 strbuf_addf(path, "%s%s", baselen ? "/" : "", sub->name);
1260 add_cache_tree(sub->cache_tree, revs, path);
1261 strbuf_setlen(path, baselen);
1262 }
1263
1264}
1265
1266void add_index_objects_to_pending(struct rev_info *revs, unsigned flags)
1267{
1268 int i;
1269
1270 read_cache()read_index(&the_index);
1271 for (i = 0; i < active_nr(the_index.cache_nr); i++) {
1272 struct cache_entry *ce = active_cache(the_index.cache)[i];
1273 struct blob *blob;
1274
1275 if (S_ISGITLINK(ce->ce_mode)(((ce->ce_mode) & 0170000) == 0160000))
1276 continue;
1277
1278 blob = lookup_blob(ce->oid.hash);
1279 if (!blob)
1280 die("unable to add index blob to traversal");
1281 add_pending_object_with_path(revs, &blob->object, "",
1282 ce->ce_mode, ce->name);
1283 }
1284
1285 if (active_cache_tree(the_index.cache_tree)) {
1286 struct strbuf path = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
1287 add_cache_tree(active_cache_tree(the_index.cache_tree), revs, &path);
1288 strbuf_release(&path);
1289 }
1290}
1291
1292static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
1293 int exclude_parent)
1294{
1295 unsigned char sha1[20];
1296 struct object *it;
1297 struct commit *commit;
1298 struct commit_list *parents;
1299 int parent_number;
1300 const char *arg = arg_;
1301
1302 if (*arg == '^') {
1303 flags ^= UNINTERESTING(1u<<1) | BOTTOM(1u<<10);
1304 arg++;
1305 }
1306 if (get_sha1_committish(arg, sha1))
1307 return 0;
1308 while (1) {
1309 it = get_reference(revs, arg, sha1, 0);
1310 if (!it && revs->ignore_missing)
1311 return 0;
1312 if (it->type != OBJ_TAG)
1313 break;
1314 if (!((struct tag*)it)->tagged)
1315 return 0;
1316 hashcpy(sha1, ((struct tag*)it)->tagged->oid.hash);
1317 }
1318 if (it->type != OBJ_COMMIT)
1319 return 0;
1320 commit = (struct commit *)it;
1321 if (exclude_parent &&
1322 exclude_parent > commit_list_count(commit->parents))
1323 return 0;
1324 for (parents = commit->parents, parent_number = 1;
1325 parents;
1326 parents = parents->next, parent_number++) {
1327 if (exclude_parent && parent_number != exclude_parent)
1328 continue;
1329
1330 it = &parents->item->object;
1331 it->flags |= flags;
1332 add_rev_cmdline(revs, it, arg_, REV_CMD_PARENTS_ONLY, flags);
1333 add_pending_object(revs, it, arg);
1334 }
1335 return 1;
1336}
1337
1338void init_revisions(struct rev_info *revs, const char *prefix)
1339{
1340 memset(revs, 0, sizeof(*revs))__builtin___memset_chk (revs, 0, sizeof(*revs), __builtin_object_size
(revs, 0));
1341
1342 revs->abbrev = DEFAULT_ABBREVdefault_abbrev;
1343 revs->ignore_merges = 1;
1344 revs->simplify_history = 1;
1345 DIFF_OPT_SET(&revs->pruning, RECURSIVE)(((&revs->pruning)->flags |= (1 << 0)),((&
revs->pruning)->touched_flags |= (1 << 0)));
1346 DIFF_OPT_SET(&revs->pruning, QUICK)(((&revs->pruning)->flags |= (1 << 11)),((&
revs->pruning)->touched_flags |= (1 << 11)));
1347 revs->pruning.add_remove = file_add_remove;
1348 revs->pruning.change = file_change;
1349 revs->sort_order = REV_SORT_IN_GRAPH_ORDER;
1350 revs->dense = 1;
1351 revs->prefix = prefix;
1352 revs->max_age = -1;
1353 revs->min_age = -1;
1354 revs->skip_count = -1;
1355 revs->max_count = -1;
1356 revs->max_parents = -1;
1357 revs->expand_tabs_in_log = -1;
1358
1359 revs->commit_format = CMIT_FMT_DEFAULT;
1360 revs->expand_tabs_in_log_default = 8;
1361
1362 init_grep_defaults();
1363 grep_init(&revs->grep_filter, prefix);
1364 revs->grep_filter.status_only = 1;
1365 revs->grep_filter.regflags = REG_NEWLINE((1 << 1) << 1);
1366
1367 diff_setup(&revs->diffopt);
1368 if (prefix && !revs->diffopt.prefix) {
1369 revs->diffopt.prefix = prefix;
1370 revs->diffopt.prefix_length = strlen(prefix);
1371 }
1372
1373 revs->notes_opt.use_default_notes = -1;
1374}
1375
1376static void add_pending_commit_list(struct rev_info *revs,
1377 struct commit_list *commit_list,
1378 unsigned int flags)
1379{
1380 while (commit_list) {
1381 struct object *object = &commit_list->item->object;
1382 object->flags |= flags;
1383 add_pending_object(revs, object, oid_to_hex(&object->oid));
1384 commit_list = commit_list->next;
1385 }
1386}
1387
1388static void prepare_show_merge(struct rev_info *revs)
1389{
1390 struct commit_list *bases;
1391 struct commit *head, *other;
1392 unsigned char sha1[20];
1393 const char **prune = NULL((void*)0);
1394 int i, prune_num = 1; /* counting terminating NULL */
1395
1396 if (get_sha1("HEAD", sha1))
1397 die("--merge without HEAD?");
1398 head = lookup_commit_or_die(sha1, "HEAD");
1399 if (get_sha1("MERGE_HEAD", sha1))
1400 die("--merge without MERGE_HEAD?");
1401 other = lookup_commit_or_die(sha1, "MERGE_HEAD");
1402 add_pending_object(revs, &head->object, "HEAD");
1403 add_pending_object(revs, &other->object, "MERGE_HEAD");
1404 bases = get_merge_bases(head, other);
1405 add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING(1u<<1) | BOTTOM(1u<<10));
1406 add_pending_commit_list(revs, bases, UNINTERESTING(1u<<1) | BOTTOM(1u<<10));
1407 free_commit_list(bases);
1408 head->object.flags |= SYMMETRIC_LEFT(1u<<8);
1409
1410 if (!active_nr(the_index.cache_nr))
1411 read_cache()read_index(&the_index);
1412 for (i = 0; i < active_nr(the_index.cache_nr); i++) {
1413 const struct cache_entry *ce = active_cache(the_index.cache)[i];
1414 if (!ce_stage(ce)(((0x3000) & (ce)->ce_flags) >> 12))
1415 continue;
1416 if (ce_path_match(ce, &revs->prune_data, NULL((void*)0))) {
1417 prune_num++;
1418 REALLOC_ARRAY(prune, prune_num)(prune) = xrealloc((prune), st_mult(sizeof(*(prune)), (prune_num
)));
1419 prune[prune_num-2] = ce->name;
1420 prune[prune_num-1] = NULL((void*)0);
1421 }
1422 while ((i+1 < active_nr(the_index.cache_nr)) &&
1423 ce_same_name(ce, active_cache(the_index.cache)[i+1]))
1424 i++;
1425 }
1426 clear_pathspec(&revs->prune_data);
1427 parse_pathspec(&revs->prune_data, PATHSPEC_ALL_MAGIC((1<<0) | (1<<1) | (1<<2) | (1<<3) | (
1<<4) | (1<<5)) & ~PATHSPEC_LITERAL(1<<2),
1428 PATHSPEC_PREFER_FULL(1<<1) | PATHSPEC_LITERAL_PATH(1<<8), "", prune);
1429 revs->limited = 1;
1430}
1431
1432int handle_revision_arg(const char *arg_, struct rev_info *revs, int flags, unsigned revarg_opt)
1433{
1434 struct object_context oc;
1435 char *dotdot;
1436 struct object *object;
1437 unsigned char sha1[20];
1438 int local_flags;
1439 const char *arg = arg_;
1440 int cant_be_filename = revarg_opt & REVARG_CANNOT_BE_FILENAME01;
1441 unsigned get_sha1_flags = 0;
1442
1443 flags = flags & UNINTERESTING(1u<<1) ? flags | BOTTOM(1u<<10) : flags & ~BOTTOM(1u<<10);
1444
1445 dotdot = strstr(arg, "..");
1446 if (dotdot) {
1447 unsigned char from_sha1[20];
1448 const char *next = dotdot + 2;
1449 const char *this = arg;
1450 int symmetric = *next == '.';
1451 unsigned int flags_exclude = flags ^ (UNINTERESTING(1u<<1) | BOTTOM(1u<<10));
1452 static const char head_by_default[] = "HEAD";
1453 unsigned int a_flags;
1454
1455 *dotdot = 0;
1456 next += symmetric;
1457
1458 if (!*next)
1459 next = head_by_default;
1460 if (dotdot == arg)
1461 this = head_by_default;
1462 if (this == head_by_default && next == head_by_default &&
1463 !symmetric) {
1464 /*
1465 * Just ".."? That is not a range but the
1466 * pathspec for the parent directory.
1467 */
1468 if (!cant_be_filename) {
1469 *dotdot = '.';
1470 return -1;
1471 }
1472 }
1473 if (!get_sha1_committish(this, from_sha1) &&
1474 !get_sha1_committish(next, sha1)) {
1475 struct object *a_obj, *b_obj;
1476
1477 if (!cant_be_filename) {
1478 *dotdot = '.';
1479 verify_non_filename(revs->prefix, arg);
1480 }
1481
1482 a_obj = parse_object(from_sha1);
1483 b_obj = parse_object(sha1);
1484 if (!a_obj || !b_obj) {
1485 missing:
1486 if (revs->ignore_missing)
1487 return 0;
1488 die(symmetric
1489 ? "Invalid symmetric difference expression %s"
1490 : "Invalid revision range %s", arg);
1491 }
1492
1493 if (!symmetric) {
1494 /* just A..B */
1495 a_flags = flags_exclude;
1496 } else {
1497 /* A...B -- find merge bases between the two */
1498 struct commit *a, *b;
1499 struct commit_list *exclude;
1500
1501 a = (a_obj->type == OBJ_COMMIT
1502 ? (struct commit *)a_obj
1503 : lookup_commit_reference(a_obj->oid.hash));
1504 b = (b_obj->type == OBJ_COMMIT
1505 ? (struct commit *)b_obj
1506 : lookup_commit_reference(b_obj->oid.hash));
1507 if (!a || !b)
1508 goto missing;
1509 exclude = get_merge_bases(a, b);
1510 add_rev_cmdline_list(revs, exclude,
1511 REV_CMD_MERGE_BASE,
1512 flags_exclude);
1513 add_pending_commit_list(revs, exclude,
1514 flags_exclude);
1515 free_commit_list(exclude);
1516
1517 a_flags = flags | SYMMETRIC_LEFT(1u<<8);
1518 }
1519
1520 a_obj->flags |= a_flags;
1521 b_obj->flags |= flags;
1522 add_rev_cmdline(revs, a_obj, this,
1523 REV_CMD_LEFT, a_flags);
1524 add_rev_cmdline(revs, b_obj, next,
1525 REV_CMD_RIGHT, flags);
1526 add_pending_object(revs, a_obj, this);
1527 add_pending_object(revs, b_obj, next);
1528 return 0;
1529 }
1530 *dotdot = '.';
1531 }
1532
1533 dotdot = strstr(arg, "^@");
1534 if (dotdot && !dotdot[2]) {
1535 *dotdot = 0;
1536 if (add_parents_only(revs, arg, flags, 0))
1537 return 0;
1538 *dotdot = '^';
1539 }
1540 dotdot = strstr(arg, "^!");
1541 if (dotdot && !dotdot[2]) {
1542 *dotdot = 0;
1543 if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING(1u<<1) | BOTTOM(1u<<10)), 0))
1544 *dotdot = '^';
1545 }
1546 dotdot = strstr(arg, "^-");
1547 if (dotdot) {
1548 int exclude_parent = 1;
1549
1550 if (dotdot[2]) {
1551 char *end;
1552 exclude_parent = strtoul(dotdot + 2, &end, 10);
1553 if (*end != '\0' || !exclude_parent)
1554 return -1;
1555 }
1556
1557 *dotdot = 0;
1558 if (!add_parents_only(revs, arg, flags ^ (UNINTERESTING(1u<<1) | BOTTOM(1u<<10)), exclude_parent))
1559 *dotdot = '^';
1560 }
1561
1562 local_flags = 0;
1563 if (*arg == '^') {
1564 local_flags = UNINTERESTING(1u<<1) | BOTTOM(1u<<10);
1565 arg++;
1566 }
1567
1568 if (revarg_opt & REVARG_COMMITTISH02)
1569 get_sha1_flags = GET_SHA1_COMMITTISH04;
1570
1571 if (get_sha1_with_context(arg, get_sha1_flags, sha1, &oc))
1572 return revs->ignore_missing ? 0 : -1;
1573 if (!cant_be_filename)
1574 verify_non_filename(revs->prefix, arg);
1575 object = get_reference(revs, arg, sha1, flags ^ local_flags);
1576 add_rev_cmdline(revs, object, arg_, REV_CMD_REV, flags ^ local_flags);
1577 add_pending_object_with_mode(revs, object, arg, oc.mode);
1578 return 0;
1579}
1580
1581struct cmdline_pathspec {
1582 int alloc;
1583 int nr;
1584 const char **path;
1585};
1586
1587static void append_prune_data(struct cmdline_pathspec *prune, const char **av)
1588{
1589 while (*av) {
1590 ALLOC_GROW(prune->path, prune->nr + 1, prune->alloc)do { if ((prune->nr + 1) > prune->alloc) { if ((((prune
->alloc)+16)*3/2) < (prune->nr + 1)) prune->alloc
= (prune->nr + 1); else prune->alloc = (((prune->alloc
)+16)*3/2); (prune->path) = xrealloc((prune->path), st_mult
(sizeof(*(prune->path)), (prune->alloc))); } } while (0
);
1591 prune->path[prune->nr++] = *(av++);
1592 }
1593}
1594
1595static void read_pathspec_from_stdin(struct rev_info *revs, struct strbuf *sb,
1596 struct cmdline_pathspec *prune)
1597{
1598 while (strbuf_getline(sb, stdin__stdinp) != EOF(-1)) {
1599 ALLOC_GROW(prune->path, prune->nr + 1, prune->alloc)do { if ((prune->nr + 1) > prune->alloc) { if ((((prune
->alloc)+16)*3/2) < (prune->nr + 1)) prune->alloc
= (prune->nr + 1); else prune->alloc = (((prune->alloc
)+16)*3/2); (prune->path) = xrealloc((prune->path), st_mult
(sizeof(*(prune->path)), (prune->alloc))); } } while (0
);
1600 prune->path[prune->nr++] = xstrdup(sb->buf);
1601 }
1602}
1603
1604static void read_revisions_from_stdin(struct rev_info *revs,
1605 struct cmdline_pathspec *prune)
1606{
1607 struct strbuf sb;
1608 int seen_dashdash = 0;
1609 int save_warning;
1610
1611 save_warning = warn_on_object_refname_ambiguity;
1612 warn_on_object_refname_ambiguity = 0;
1613
1614 strbuf_init(&sb, 1000);
1615 while (strbuf_getline(&sb, stdin__stdinp) != EOF(-1)) {
1616 int len = sb.len;
1617 if (!len)
1618 break;
1619 if (sb.buf[0] == '-') {
1620 if (len == 2 && sb.buf[1] == '-') {
1621 seen_dashdash = 1;
1622 break;
1623 }
1624 die("options not supported in --stdin mode");
1625 }
1626 if (handle_revision_arg(sb.buf, revs, 0,
1627 REVARG_CANNOT_BE_FILENAME01))
1628 die("bad revision '%s'", sb.buf);
1629 }
1630 if (seen_dashdash)
1631 read_pathspec_from_stdin(revs, &sb, prune);
1632
1633 strbuf_release(&sb);
1634 warn_on_object_refname_ambiguity = save_warning;
1635}
1636
1637static void add_grep(struct rev_info *revs, const char *ptn, enum grep_pat_token what)
1638{
1639 append_grep_pattern(&revs->grep_filter, ptn, "command line", 0, what);
1640}
1641
1642static void add_header_grep(struct rev_info *revs, enum grep_header_field field, const char *pattern)
1643{
1644 append_header_grep_pattern(&revs->grep_filter, field, pattern);
1645}
1646
1647static void add_message_grep(struct rev_info *revs, const char *pattern)
1648{
1649 add_grep(revs, pattern, GREP_PATTERN_BODY);
1650}
1651
1652static int handle_revision_opt(struct rev_info *revs, int argc, const char **argv,
1653 int *unkc, const char **unkv)
1654{
1655 const char *arg = argv[0];
1656 const char *optarg;
1657 int argcount;
1658
1659 /* pseudo revision arguments */
1660 if (!strcmp(arg, "--all") || !strcmp(arg, "--branches") ||
1661 !strcmp(arg, "--tags") || !strcmp(arg, "--remotes") ||
1662 !strcmp(arg, "--reflog") || !strcmp(arg, "--not") ||
1663 !strcmp(arg, "--no-walk") || !strcmp(arg, "--do-walk") ||
1664 !strcmp(arg, "--bisect") || starts_with(arg, "--glob=") ||
1665 !strcmp(arg, "--indexed-objects") ||
1666 starts_with(arg, "--exclude=") ||
1667 starts_with(arg, "--branches=") || starts_with(arg, "--tags=") ||
1668 starts_with(arg, "--remotes=") || starts_with(arg, "--no-walk="))
1669 {
1670 unkv[(*unkc)++] = arg;
1671 return 1;
1672 }
1673
1674 if ((argcount = parse_long_opt("max-count", argv, &optarg))) {
1675 revs->max_count = atoi(optarg);
1676 revs->no_walk = 0;
1677 return argcount;
1678 } else if ((argcount = parse_long_opt("skip", argv, &optarg))) {
1679 revs->skip_count = atoi(optarg);
1680 return argcount;
1681 } else if ((*arg == '-') && isdigit(arg[1])((sane_ctype[(unsigned char)(arg[1])] & (0x02)) != 0)) {
1682 /* accept -<digit>, like traditional "head" */
1683 if (strtol_i(arg + 1, 10, &revs->max_count) < 0 ||
1684 revs->max_count < 0)
1685 die("'%s': not a non-negative integer", arg + 1);
1686 revs->no_walk = 0;
1687 } else if (!strcmp(arg, "-n")) {
1688 if (argc <= 1)
1689 return error("-n requires an argument")(error("-n requires an argument"), const_error());
1690 revs->max_count = atoi(argv[1]);
1691 revs->no_walk = 0;
1692 return 2;
1693 } else if (starts_with(arg, "-n")) {
1694 revs->max_count = atoi(arg + 2);
1695 revs->no_walk = 0;
1696 } else if ((argcount = parse_long_opt("max-age", argv, &optarg))) {
1697 revs->max_age = atoi(optarg);
1698 return argcount;
1699 } else if ((argcount = parse_long_opt("since", argv, &optarg))) {
1700 revs->max_age = approxidate(optarg)approxidate_careful((optarg), ((void*)0));
1701 return argcount;
1702 } else if ((argcount = parse_long_opt("after", argv, &optarg))) {
1703 revs->max_age = approxidate(optarg)approxidate_careful((optarg), ((void*)0));
1704 return argcount;
1705 } else if ((argcount = parse_long_opt("min-age", argv, &optarg))) {
1706 revs->min_age = atoi(optarg);
1707 return argcount;
1708 } else if ((argcount = parse_long_opt("before", argv, &optarg))) {
1709 revs->min_age = approxidate(optarg)approxidate_careful((optarg), ((void*)0));
1710 return argcount;
1711 } else if ((argcount = parse_long_opt("until", argv, &optarg))) {
1712 revs->min_age = approxidate(optarg)approxidate_careful((optarg), ((void*)0));
1713 return argcount;
1714 } else if (!strcmp(arg, "--first-parent")) {
1715 revs->first_parent_only = 1;
1716 } else if (!strcmp(arg, "--ancestry-path")) {
1717 revs->ancestry_path = 1;
1718 revs->simplify_history = 0;
1719 revs->limited = 1;
1720 } else if (!strcmp(arg, "-g") || !strcmp(arg, "--walk-reflogs")) {
1721 init_reflog_walk(&revs->reflog_info);
1722 } else if (!strcmp(arg, "--default")) {
1723 if (argc <= 1)
1724 return error("bad --default argument")(error("bad --default argument"), const_error());
1725 revs->def = argv[1];
1726 return 2;
1727 } else if (!strcmp(arg, "--merge")) {
1728 revs->show_merge = 1;
1729 } else if (!strcmp(arg, "--topo-order")) {
1730 revs->sort_order = REV_SORT_IN_GRAPH_ORDER;
1731 revs->topo_order = 1;
1732 } else if (!strcmp(arg, "--simplify-merges")) {
1733 revs->simplify_merges = 1;
1734 revs->topo_order = 1;
1735 revs->rewrite_parents = 1;
1736 revs->simplify_history = 0;
1737 revs->limited = 1;
1738 } else if (!strcmp(arg, "--simplify-by-decoration")) {
1739 revs->simplify_merges = 1;
1740 revs->topo_order = 1;
1741 revs->rewrite_parents = 1;
1742 revs->simplify_history = 0;
1743 revs->simplify_by_decoration = 1;
1744 revs->limited = 1;
1745 revs->prune = 1;
1746 load_ref_decorations(DECORATE_SHORT_REFS1);
1747 } else if (!strcmp(arg, "--date-order")) {
1748 revs->sort_order = REV_SORT_BY_COMMIT_DATE;
1749 revs->topo_order = 1;
1750 } else if (!strcmp(arg, "--author-date-order")) {
1751 revs->sort_order = REV_SORT_BY_AUTHOR_DATE;
1752 revs->topo_order = 1;
1753 } else if (starts_with(arg, "--early-output")) {
1754 int count = 100;
1755 switch (arg[14]) {
1756 case '=':
1757 count = atoi(arg+15);
1758 /* Fallthrough */
1759 case 0:
1760 revs->topo_order = 1;
1761 revs->early_output = count;
1762 }
1763 } else if (!strcmp(arg, "--parents")) {
1764 revs->rewrite_parents = 1;
1765 revs->print_parents = 1;
1766 } else if (!strcmp(arg, "--dense")) {
1767 revs->dense = 1;
1768 } else if (!strcmp(arg, "--sparse")) {
1769 revs->dense = 0;
1770 } else if (!strcmp(arg, "--show-all")) {
1771 revs->show_all = 1;
1772 } else if (!strcmp(arg, "--remove-empty")) {
1773 revs->remove_empty_trees = 1;
1774 } else if (!strcmp(arg, "--merges")) {
1775 revs->min_parents = 2;
1776 } else if (!strcmp(arg, "--no-merges")) {
1777 revs->max_parents = 1;
1778 } else if (starts_with(arg, "--min-parents=")) {
1779 revs->min_parents = atoi(arg+14);
1780 } else if (starts_with(arg, "--no-min-parents")) {
1781 revs->min_parents = 0;
1782 } else if (starts_with(arg, "--max-parents=")) {
1783 revs->max_parents = atoi(arg+14);
1784 } else if (starts_with(arg, "--no-max-parents")) {
1785 revs->max_parents = -1;
1786 } else if (!strcmp(arg, "--boundary")) {
1787 revs->boundary = 1;
1788 } else if (!strcmp(arg, "--left-right")) {
1789 revs->left_right = 1;
1790 } else if (!strcmp(arg, "--left-only")) {
1791 if (revs->right_only)
1792 die("--left-only is incompatible with --right-only"
1793 " or --cherry");
1794 revs->left_only = 1;
1795 } else if (!strcmp(arg, "--right-only")) {
1796 if (revs->left_only)
1797 die("--right-only is incompatible with --left-only");
1798 revs->right_only = 1;
1799 } else if (!strcmp(arg, "--cherry")) {
1800 if (revs->left_only)
1801 die("--cherry is incompatible with --left-only");
1802 revs->cherry_mark = 1;
1803 revs->right_only = 1;
1804 revs->max_parents = 1;
1805 revs->limited = 1;
1806 } else if (!strcmp(arg, "--count")) {
1807 revs->count = 1;
1808 } else if (!strcmp(arg, "--cherry-mark")) {
1809 if (revs->cherry_pick)
1810 die("--cherry-mark is incompatible with --cherry-pick");
1811 revs->cherry_mark = 1;
1812 revs->limited = 1; /* needs limit_list() */
1813 } else if (!strcmp(arg, "--cherry-pick")) {
1814 if (revs->cherry_mark)
1815 die("--cherry-pick is incompatible with --cherry-mark");
1816 revs->cherry_pick = 1;
1817 revs->limited = 1;
1818 } else if (!strcmp(arg, "--objects")) {
1819 revs->tag_objects = 1;
1820 revs->tree_objects = 1;
1821 revs->blob_objects = 1;
1822 } else if (!strcmp(arg, "--objects-edge")) {
1823 revs->tag_objects = 1;
1824 revs->tree_objects = 1;
1825 revs->blob_objects = 1;
1826 revs->edge_hint = 1;
1827 } else if (!strcmp(arg, "--objects-edge-aggressive")) {
1828 revs->tag_objects = 1;
1829 revs->tree_objects = 1;
1830 revs->blob_objects = 1;
1831 revs->edge_hint = 1;
1832 revs->edge_hint_aggressive = 1;
1833 } else if (!strcmp(arg, "--verify-objects")) {
1834 revs->tag_objects = 1;
1835 revs->tree_objects = 1;
1836 revs->blob_objects = 1;
1837 revs->verify_objects = 1;
1838 } else if (!strcmp(arg, "--unpacked")) {
1839 revs->unpacked = 1;
1840 } else if (starts_with(arg, "--unpacked=")) {
1841 die("--unpacked=<packfile> no longer supported.");
1842 } else if (!strcmp(arg, "-r")) {
1843 revs->diff = 1;
1844 DIFF_OPT_SET(&revs->diffopt, RECURSIVE)(((&revs->diffopt)->flags |= (1 << 0)),((&
revs->diffopt)->touched_flags |= (1 << 0)));
1845 } else if (!strcmp(arg, "-t")) {
1846 revs->diff = 1;
1847 DIFF_OPT_SET(&revs->diffopt, RECURSIVE)(((&revs->diffopt)->flags |= (1 << 0)),((&
revs->diffopt)->touched_flags |= (1 << 0)));
1848 DIFF_OPT_SET(&revs->diffopt, TREE_IN_RECURSIVE)(((&revs->diffopt)->flags |= (1 << 1)),((&
revs->diffopt)->touched_flags |= (1 << 1)));
1849 } else if (!strcmp(arg, "-m")) {
1850 revs->ignore_merges = 0;
1851 } else if (!strcmp(arg, "-c")) {
1852 revs->diff = 1;
1853 revs->dense_combined_merges = 0;
1854 revs->combine_merges = 1;
1855 } else if (!strcmp(arg, "--cc")) {
1856 revs->diff = 1;
1857 revs->dense_combined_merges = 1;
1858 revs->combine_merges = 1;
1859 } else if (!strcmp(arg, "-v")) {
1860 revs->verbose_header = 1;
1861 } else if (!strcmp(arg, "--pretty")) {
1862 revs->verbose_header = 1;
1863 revs->pretty_given = 1;
1864 get_commit_format(NULL((void*)0), revs);
1865 } else if (starts_with(arg, "--pretty=") || starts_with(arg, "--format=")) {
1866 /*
1867 * Detached form ("--pretty X" as opposed to "--pretty=X")
1868 * not allowed, since the argument is optional.
1869 */
1870 revs->verbose_header = 1;
1871 revs->pretty_given = 1;
1872 get_commit_format(arg+9, revs);
1873 } else if (!strcmp(arg, "--expand-tabs")) {
1874 revs->expand_tabs_in_log = 8;
1875 } else if (!strcmp(arg, "--no-expand-tabs")) {
1876 revs->expand_tabs_in_log = 0;
1877 } else if (skip_prefix(arg, "--expand-tabs=", &arg)) {
1878 int val;
1879 if (strtol_i(arg, 10, &val) < 0 || val < 0)
1880 die("'%s': not a non-negative integer", arg);
1881 revs->expand_tabs_in_log = val;
1882 } else if (!strcmp(arg, "--show-notes") || !strcmp(arg, "--notes")) {
1883 revs->show_notes = 1;
1884 revs->show_notes_given = 1;
1885 revs->notes_opt.use_default_notes = 1;
1886 } else if (!strcmp(arg, "--show-signature")) {
1887 revs->show_signature = 1;
1888 } else if (!strcmp(arg, "--no-show-signature")) {
1889 revs->show_signature = 0;
1890 } else if (!strcmp(arg, "--show-linear-break") ||
1891 starts_with(arg, "--show-linear-break=")) {
1892 if (starts_with(arg, "--show-linear-break="))
1893 revs->break_bar = xstrdup(arg + 20);
1894 else
1895 revs->break_bar = " ..........";
1896 revs->track_linear = 1;
1897 revs->track_first_time = 1;
1898 } else if (starts_with(arg, "--show-notes=") ||
1899 starts_with(arg, "--notes=")) {
1900 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
1901 revs->show_notes = 1;
1902 revs->show_notes_given = 1;
1903 if (starts_with(arg, "--show-notes")) {
1904 if (revs->notes_opt.use_default_notes < 0)
1905 revs->notes_opt.use_default_notes = 1;
1906 strbuf_addstr(&buf, arg+13);
1907 }
1908 else
1909 strbuf_addstr(&buf, arg+8);
1910 expand_notes_ref(&buf);
1911 string_list_append(&revs->notes_opt.extra_notes_refs,
1912 strbuf_detach(&buf, NULL((void*)0)));
1913 } else if (!strcmp(arg, "--no-notes")) {
1914 revs->show_notes = 0;
1915 revs->show_notes_given = 1;
1916 revs->notes_opt.use_default_notes = -1;
1917 /* we have been strdup'ing ourselves, so trick
1918 * string_list into free()ing strings */
1919 revs->notes_opt.extra_notes_refs.strdup_strings = 1;
1920 string_list_clear(&revs->notes_opt.extra_notes_refs, 0);
1921 revs->notes_opt.extra_notes_refs.strdup_strings = 0;
1922 } else if (!strcmp(arg, "--standard-notes")) {
1923 revs->show_notes_given = 1;
1924 revs->notes_opt.use_default_notes = 1;
1925 } else if (!strcmp(arg, "--no-standard-notes")) {
1926 revs->notes_opt.use_default_notes = 0;
1927 } else if (!strcmp(arg, "--oneline")) {
1928 revs->verbose_header = 1;
1929 get_commit_format("oneline", revs);
1930 revs->pretty_given = 1;
1931 revs->abbrev_commit = 1;
1932 } else if (!strcmp(arg, "--graph")) {
1933 revs->topo_order = 1;
1934 revs->rewrite_parents = 1;
1935 revs->graph = graph_init(revs);
1936 } else if (!strcmp(arg, "--root")) {
1937 revs->show_root_diff = 1;
1938 } else if (!strcmp(arg, "--no-commit-id")) {
1939 revs->no_commit_id = 1;
1940 } else if (!strcmp(arg, "--always")) {
1941 revs->always_show_header = 1;
1942 } else if (!strcmp(arg, "--no-abbrev")) {
1943 revs->abbrev = 0;
1944 } else if (!strcmp(arg, "--abbrev")) {
1945 revs->abbrev = DEFAULT_ABBREVdefault_abbrev;
1946 } else if (starts_with(arg, "--abbrev=")) {
1947 revs->abbrev = strtoul(arg + 9, NULL((void*)0), 10);
1948 if (revs->abbrev < MINIMUM_ABBREVminimum_abbrev)
1949 revs->abbrev = MINIMUM_ABBREVminimum_abbrev;
1950 else if (revs->abbrev > 40)
1951 revs->abbrev = 40;
1952 } else if (!strcmp(arg, "--abbrev-commit")) {
1953 revs->abbrev_commit = 1;
1954 revs->abbrev_commit_given = 1;
1955 } else if (!strcmp(arg, "--no-abbrev-commit")) {
1956 revs->abbrev_commit = 0;
1957 } else if (!strcmp(arg, "--full-diff")) {
1958 revs->diff = 1;
1959 revs->full_diff = 1;
1960 } else if (!strcmp(arg, "--full-history")) {
1961 revs->simplify_history = 0;
1962 } else if (!strcmp(arg, "--relative-date")) {
1963 revs->date_mode.type = DATE_RELATIVE;
1964 revs->date_mode_explicit = 1;
1965 } else if ((argcount = parse_long_opt("date", argv, &optarg))) {
1966 parse_date_format(optarg, &revs->date_mode);
1967 revs->date_mode_explicit = 1;
1968 return argcount;
1969 } else if (!strcmp(arg, "--log-size")) {
1970 revs->show_log_size = 1;
1971 }
1972 /*
1973 * Grepping the commit log
1974 */
1975 else if ((argcount = parse_long_opt("author", argv, &optarg))) {
1976 add_header_grep(revs, GREP_HEADER_AUTHOR, optarg);
1977 return argcount;
1978 } else if ((argcount = parse_long_opt("committer", argv, &optarg))) {
1979 add_header_grep(revs, GREP_HEADER_COMMITTER, optarg);
1980 return argcount;
1981 } else if ((argcount = parse_long_opt("grep-reflog", argv, &optarg))) {
1982 add_header_grep(revs, GREP_HEADER_REFLOG, optarg);
1983 return argcount;
1984 } else if ((argcount = parse_long_opt("grep", argv, &optarg))) {
1985 add_message_grep(revs, optarg);
1986 return argcount;
1987 } else if (!strcmp(arg, "--grep-debug")) {
1988 revs->grep_filter.debug = 1;
1989 } else if (!strcmp(arg, "--basic-regexp")) {
1990 revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_BRE;
1991 } else if (!strcmp(arg, "--extended-regexp") || !strcmp(arg, "-E")) {
1992 revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_ERE;
1993 } else if (!strcmp(arg, "--regexp-ignore-case") || !strcmp(arg, "-i")) {
1994 revs->grep_filter.regflags |= REG_ICASE(1 << 1);
1995 DIFF_OPT_SET(&revs->diffopt, PICKAXE_IGNORE_CASE)(((&revs->diffopt)->flags |= (1 << 30)),((&
revs->diffopt)->touched_flags |= (1 << 30)));
1996 } else if (!strcmp(arg, "--fixed-strings") || !strcmp(arg, "-F")) {
1997 revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_FIXED;
1998 } else if (!strcmp(arg, "--perl-regexp")) {
1999 revs->grep_filter.pattern_type_option = GREP_PATTERN_TYPE_PCRE;
2000 } else if (!strcmp(arg, "--all-match")) {
2001 revs->grep_filter.all_match = 1;
2002 } else if (!strcmp(arg, "--invert-grep")) {
2003 revs->invert_grep = 1;
2004 } else if ((argcount = parse_long_opt("encoding", argv, &optarg))) {
2005 if (strcmp(optarg, "none"))
2006 git_log_output_encoding = xstrdup(optarg);
2007 else
2008 git_log_output_encoding = "";
2009 return argcount;
2010 } else if (!strcmp(arg, "--reverse")) {
2011 revs->reverse ^= 1;
2012 } else if (!strcmp(arg, "--children")) {
2013 revs->children.name = "children";
2014 revs->limited = 1;
2015 } else if (!strcmp(arg, "--ignore-missing")) {
2016 revs->ignore_missing = 1;
2017 } else {
2018 int opts = diff_opt_parse(&revs->diffopt, argv, argc, revs->prefix);
2019 if (!opts)
2020 unkv[(*unkc)++] = arg;
2021 return opts;
2022 }
2023 if (revs->graph && revs->track_linear)
2024 die("--show-linear-break and --graph are incompatible");
2025
2026 return 1;
2027}
2028
2029void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
2030 const struct option *options,
2031 const char * const usagestr[])
2032{
2033 int n = handle_revision_opt(revs, ctx->argc, ctx->argv,
2034 &ctx->cpidx, ctx->out);
2035 if (n <= 0) {
2036 error("unknown option `%s'", ctx->argv[0])(error("unknown option `%s'", ctx->argv[0]), const_error()
);
2037 usage_with_options(usagestr, options);
2038 }
2039 ctx->argv += n;
2040 ctx->argc -= n;
2041}
2042
2043static int for_each_bisect_ref(const char *submodule, each_ref_fn fn, void *cb_data, const char *term) {
2044 struct strbuf bisect_refs = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
2045 int status;
2046 strbuf_addf(&bisect_refs, "refs/bisect/%s", term);
2047 status = for_each_ref_in_submodule(submodule, bisect_refs.buf, fn, cb_data);
2048 strbuf_release(&bisect_refs);
2049 return status;
2050}
2051
2052static int for_each_bad_bisect_ref(const char *submodule, each_ref_fn fn, void *cb_data)
2053{
2054 return for_each_bisect_ref(submodule, fn, cb_data, term_bad);
2055}
2056
2057static int for_each_good_bisect_ref(const char *submodule, each_ref_fn fn, void *cb_data)
2058{
2059 return for_each_bisect_ref(submodule, fn, cb_data, term_good);
2060}
2061
2062static int handle_revision_pseudo_opt(const char *submodule,
2063 struct rev_info *revs,
2064 int argc, const char **argv, int *flags)
2065{
2066 const char *arg = argv[0];
2067 const char *optarg;
2068 int argcount;
2069
2070 /*
2071 * NOTE!
2072 *
2073 * Commands like "git shortlog" will not accept the options below
2074 * unless parse_revision_opt queues them (as opposed to erroring
2075 * out).
2076 *
2077 * When implementing your new pseudo-option, remember to
2078 * register it in the list at the top of handle_revision_opt.
2079 */
2080 if (!strcmp(arg, "--all")) {
2081 handle_refs(submodule, revs, *flags, for_each_ref_submodule);
2082 handle_refs(submodule, revs, *flags, head_ref_submodule);
2083 clear_ref_exclusion(&revs->ref_excludes);
2084 } else if (!strcmp(arg, "--branches")) {
2085 handle_refs(submodule, revs, *flags, for_each_branch_ref_submodule);
2086 clear_ref_exclusion(&revs->ref_excludes);
2087 } else if (!strcmp(arg, "--bisect")) {
2088 read_bisect_terms(&term_bad, &term_good);
2089 handle_refs(submodule, revs, *flags, for_each_bad_bisect_ref);
2090 handle_refs(submodule, revs, *flags ^ (UNINTERESTING(1u<<1) | BOTTOM(1u<<10)), for_each_good_bisect_ref);
2091 revs->bisect = 1;
2092 } else if (!strcmp(arg, "--tags")) {
2093 handle_refs(submodule, revs, *flags, for_each_tag_ref_submodule);
2094 clear_ref_exclusion(&revs->ref_excludes);
2095 } else if (!strcmp(arg, "--remotes")) {
2096 handle_refs(submodule, revs, *flags, for_each_remote_ref_submodule);
2097 clear_ref_exclusion(&revs->ref_excludes);
2098 } else if ((argcount = parse_long_opt("glob", argv, &optarg))) {
2099 struct all_refs_cb cb;
2100 init_all_refs_cb(&cb, revs, *flags);
2101 for_each_glob_ref(handle_one_ref, optarg, &cb);
2102 clear_ref_exclusion(&revs->ref_excludes);
2103 return argcount;
2104 } else if ((argcount = parse_long_opt("exclude", argv, &optarg))) {
2105 add_ref_exclusion(&revs->ref_excludes, optarg);
2106 return argcount;
2107 } else if (starts_with(arg, "--branches=")) {
2108 struct all_refs_cb cb;
2109 init_all_refs_cb(&cb, revs, *flags);
2110 for_each_glob_ref_in(handle_one_ref, arg + 11, "refs/heads/", &cb);
2111 clear_ref_exclusion(&revs->ref_excludes);
2112 } else if (starts_with(arg, "--tags=")) {
2113 struct all_refs_cb cb;
2114 init_all_refs_cb(&cb, revs, *flags);
2115 for_each_glob_ref_in(handle_one_ref, arg + 7, "refs/tags/", &cb);
2116 clear_ref_exclusion(&revs->ref_excludes);
2117 } else if (starts_with(arg, "--remotes=")) {
2118 struct all_refs_cb cb;
2119 init_all_refs_cb(&cb, revs, *flags);
2120 for_each_glob_ref_in(handle_one_ref, arg + 10, "refs/remotes/", &cb);
2121 clear_ref_exclusion(&revs->ref_excludes);
2122 } else if (!strcmp(arg, "--reflog")) {
2123 add_reflogs_to_pending(revs, *flags);
2124 } else if (!strcmp(arg, "--indexed-objects")) {
2125 add_index_objects_to_pending(revs, *flags);
2126 } else if (!strcmp(arg, "--not")) {
2127 *flags ^= UNINTERESTING(1u<<1) | BOTTOM(1u<<10);
2128 } else if (!strcmp(arg, "--no-walk")) {
2129 revs->no_walk = REVISION_WALK_NO_WALK_SORTED1;
2130 } else if (starts_with(arg, "--no-walk=")) {
2131 /*
2132 * Detached form ("--no-walk X" as opposed to "--no-walk=X")
2133 * not allowed, since the argument is optional.
2134 */
2135 if (!strcmp(arg + 10, "sorted"))
2136 revs->no_walk = REVISION_WALK_NO_WALK_SORTED1;
2137 else if (!strcmp(arg + 10, "unsorted"))
2138 revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED2;
2139 else
2140 return error("invalid argument to --no-walk")(error("invalid argument to --no-walk"), const_error());
2141 } else if (!strcmp(arg, "--do-walk")) {
2142 revs->no_walk = 0;
2143 } else {
2144 return 0;
2145 }
2146
2147 return 1;
2148}
2149
2150static void NORETURN__attribute__((__noreturn__)) diagnose_missing_default(const char *def)
2151{
2152 unsigned char sha1[20];
2153 int flags;
2154 const char *refname;
2155
2156 refname = resolve_ref_unsafe(def, 0, sha1, &flags);
2157 if (!refname || !(flags & REF_ISSYMREF0x01) || (flags & REF_ISBROKEN0x04))
2158 die(_("your current branch appears to be broken"));
2159
2160 skip_prefix(refname, "refs/heads/", &refname);
2161 die(_("your current branch '%s' does not have any commits yet"),
2162 refname);
2163}
2164
2165/*
2166 * Parse revision information, filling in the "rev_info" structure,
2167 * and removing the used arguments from the argument list.
2168 *
2169 * Returns the number of arguments left that weren't recognized
2170 * (which are also moved to the head of the argument list)
2171 */
2172int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct setup_revision_opt *opt)
2173{
2174 int i, flags, left, seen_dashdash, read_from_stdin, got_rev_arg = 0, revarg_opt;
2175 struct cmdline_pathspec prune_data;
2176 const char *submodule = NULL((void*)0);
2177
2178 memset(&prune_data, 0, sizeof(prune_data))__builtin___memset_chk (&prune_data, 0, sizeof(prune_data
), __builtin_object_size (&prune_data, 0));
2179 if (opt)
2180 submodule = opt->submodule;
2181
2182 /* First, search for "--" */
2183 if (opt && opt->assume_dashdash) {
2184 seen_dashdash = 1;
2185 } else {
2186 seen_dashdash = 0;
2187 for (i = 1; i < argc; i++) {
2188 const char *arg = argv[i];
2189 if (strcmp(arg, "--"))
2190 continue;
2191 argv[i] = NULL((void*)0);
2192 argc = i;
2193 if (argv[i + 1])
2194 append_prune_data(&prune_data, argv + i + 1);
2195 seen_dashdash = 1;
2196 break;
2197 }
2198 }
2199
2200 /* Second, deal with arguments and options */
2201 flags = 0;
2202 revarg_opt = opt ? opt->revarg_opt : 0;
2203 if (seen_dashdash)
2204 revarg_opt |= REVARG_CANNOT_BE_FILENAME01;
2205 read_from_stdin = 0;
2206 for (left = i = 1; i < argc; i++) {
2207 const char *arg = argv[i];
2208 if (*arg == '-') {
2209 int opts;
2210
2211 opts = handle_revision_pseudo_opt(submodule,
2212 revs, argc - i, argv + i,
2213 &flags);
2214 if (opts > 0) {
2215 i += opts - 1;
2216 continue;
2217 }
2218
2219 if (!strcmp(arg, "--stdin")) {
2220 if (revs->disable_stdin) {
2221 argv[left++] = arg;
2222 continue;
2223 }
2224 if (read_from_stdin++)
2225 die("--stdin given twice?");
2226 read_revisions_from_stdin(revs, &prune_data);
2227 continue;
2228 }
2229
2230 opts = handle_revision_opt(revs, argc - i, argv + i, &left, argv);
2231 if (opts > 0) {
2232 i += opts - 1;
2233 continue;
2234 }
2235 if (opts < 0)
2236 exit(128);
2237 continue;
2238 }
2239
2240
2241 if (handle_revision_arg(arg, revs, flags, revarg_opt)) {
2242 int j;
2243 if (seen_dashdash || *arg == '^')
2244 die("bad revision '%s'", arg);
2245
2246 /* If we didn't have a "--":
2247 * (1) all filenames must exist;
2248 * (2) all rev-args must not be interpretable
2249 * as a valid filename.
2250 * but the latter we have checked in the main loop.
2251 */
2252 for (j = i; j < argc; j++)
2253 verify_filename(revs->prefix, argv[j], j == i);
2254
2255 append_prune_data(&prune_data, argv + i);
2256 break;
2257 }
2258 else
2259 got_rev_arg = 1;
2260 }
2261
2262 if (prune_data.nr) {
2263 /*
2264 * If we need to introduce the magic "a lone ':' means no
2265 * pathspec whatsoever", here is the place to do so.
2266 *
2267 * if (prune_data.nr == 1 && !strcmp(prune_data[0], ":")) {
2268 * prune_data.nr = 0;
2269 * prune_data.alloc = 0;
2270 * free(prune_data.path);
2271 * prune_data.path = NULL;
2272 * } else {
2273 * terminate prune_data.alloc with NULL and
2274 * call init_pathspec() to set revs->prune_data here.
2275 * }
2276 */
2277 ALLOC_GROW(prune_data.path, prune_data.nr + 1, prune_data.alloc)do { if ((prune_data.nr + 1) > prune_data.alloc) { if ((((
prune_data.alloc)+16)*3/2) < (prune_data.nr + 1)) prune_data
.alloc = (prune_data.nr + 1); else prune_data.alloc = (((prune_data
.alloc)+16)*3/2); (prune_data.path) = xrealloc((prune_data.path
), st_mult(sizeof(*(prune_data.path)), (prune_data.alloc))); }
} while (0);
2278 prune_data.path[prune_data.nr++] = NULL((void*)0);
2279 parse_pathspec(&revs->prune_data, 0, 0,
2280 revs->prefix, prune_data.path);
2281 }
2282
2283 if (revs->def == NULL((void*)0))
2284 revs->def = opt ? opt->def : NULL((void*)0);
2285 if (opt && opt->tweak)
2286 opt->tweak(revs, opt);
2287 if (revs->show_merge)
2288 prepare_show_merge(revs);
2289 if (revs->def && !revs->pending.nr && !got_rev_arg) {
2290 unsigned char sha1[20];
2291 struct object *object;
2292 struct object_context oc;
2293 if (get_sha1_with_context(revs->def, 0, sha1, &oc))
2294 diagnose_missing_default(revs->def);
2295 object = get_reference(revs, revs->def, sha1, 0);
2296 add_pending_object_with_mode(revs, object, revs->def, oc.mode);
2297 }
2298
2299 /* Did the user ask for any diff output? Run the diff! */
2300 if (revs->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT0x0800)
2301 revs->diff = 1;
2302
2303 /* Pickaxe, diff-filter and rename following need diffs */
2304 if (revs->diffopt.pickaxe ||
2305 revs->diffopt.filter ||
2306 DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES)((&revs->diffopt)->flags & (1 << 7)))
2307 revs->diff = 1;
2308
2309 if (revs->topo_order)
2310 revs->limited = 1;
2311
2312 if (revs->prune_data.nr) {
2313 copy_pathspec(&revs->pruning.pathspec, &revs->prune_data);
2314 /* Can't prune commits with rename following: the paths change.. */
2315 if (!DIFF_OPT_TST(&revs->diffopt, FOLLOW_RENAMES)((&revs->diffopt)->flags & (1 << 7)))
2316 revs->prune = 1;
2317 if (!revs->full_diff)
2318 copy_pathspec(&revs->diffopt.pathspec,
2319 &revs->prune_data);
2320 }
2321 if (revs->combine_merges)
2322 revs->ignore_merges = 0;
2323 revs->diffopt.abbrev = revs->abbrev;
2324
2325 if (revs->line_level_traverse) {
2326 revs->limited = 1;
2327 revs->topo_order = 1;
2328 }
2329
2330 diff_setup_done(&revs->diffopt);
2331
2332 grep_commit_pattern_type(GREP_PATTERN_TYPE_UNSPECIFIED,
2333 &revs->grep_filter);
2334 compile_grep_patterns(&revs->grep_filter);
2335
2336 if (revs->reverse && revs->reflog_info)
2337 die("cannot combine --reverse with --walk-reflogs");
2338 if (revs->rewrite_parents && revs->children.name)
2339 die("cannot combine --parents and --children");
2340
2341 /*
2342 * Limitations on the graph functionality
2343 */
2344 if (revs->reverse && revs->graph)
2345 die("cannot combine --reverse with --graph");
2346
2347 if (revs->reflog_info && revs->graph)
2348 die("cannot combine --walk-reflogs with --graph");
2349 if (revs->no_walk && revs->graph)
2350 die("cannot combine --no-walk with --graph");
2351 if (!revs->reflog_info && revs->grep_filter.use_reflog_filter)
2352 die("cannot use --grep-reflog without --walk-reflogs");
2353
2354 if (revs->first_parent_only && revs->bisect)
2355 die(_("--first-parent is incompatible with --bisect"));
2356
2357 if (revs->expand_tabs_in_log < 0)
2358 revs->expand_tabs_in_log = revs->expand_tabs_in_log_default;
2359
2360 return left;
2361}
2362
2363static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
2364{
2365 struct commit_list *l = xcalloc(1, sizeof(*l));
2366
2367 l->item = child;
2368 l->next = add_decoration(&revs->children, &parent->object, l);
2369}
2370
2371static int remove_duplicate_parents(struct rev_info *revs, struct commit *commit)
2372{
2373 struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
2374 struct commit_list **pp, *p;
2375 int surviving_parents;
2376
2377 /* Examine existing parents while marking ones we have seen... */
2378 pp = &commit->parents;
2379 surviving_parents = 0;
2380 while ((p = *pp) != NULL((void*)0)) {
2381 struct commit *parent = p->item;
2382 if (parent->object.flags & TMP_MARK(1u<<4)) {
2383 *pp = p->next;
2384 if (ts)
2385 compact_treesame(revs, commit, surviving_parents);
2386 continue;
2387 }
2388 parent->object.flags |= TMP_MARK(1u<<4);
2389 surviving_parents++;
2390 pp = &p->next;
2391 }
2392 /* clear the temporary mark */
2393 for (p = commit->parents; p; p = p->next) {
2394 p->item->object.flags &= ~TMP_MARK(1u<<4);
2395 }
2396 /* no update_treesame() - removing duplicates can't affect TREESAME */
2397 return surviving_parents;
2398}
2399
2400struct merge_simplify_state {
2401 struct commit *simplified;
2402};
2403
2404static struct merge_simplify_state *locate_simplify_state(struct rev_info *revs, struct commit *commit)
2405{
2406 struct merge_simplify_state *st;
2407
2408 st = lookup_decoration(&revs->merge_simplification, &commit->object);
2409 if (!st) {
2410 st = xcalloc(1, sizeof(*st));
2411 add_decoration(&revs->merge_simplification, &commit->object, st);
2412 }
2413 return st;
2414}
2415
2416static int mark_redundant_parents(struct rev_info *revs, struct commit *commit)
2417{
2418 struct commit_list *h = reduce_heads(commit->parents);
2419 int i = 0, marked = 0;
2420 struct commit_list *po, *pn;
2421
2422 /* Want these for sanity-checking only */
2423 int orig_cnt = commit_list_count(commit->parents);
2424 int cnt = commit_list_count(h);
2425
2426 /*
2427 * Not ready to remove items yet, just mark them for now, based
2428 * on the output of reduce_heads(). reduce_heads outputs the reduced
2429 * set in its original order, so this isn't too hard.
2430 */
2431 po = commit->parents;
2432 pn = h;
2433 while (po) {
2434 if (pn && po->item == pn->item) {
2435 pn = pn->next;
2436 i++;
2437 } else {
2438 po->item->object.flags |= TMP_MARK(1u<<4);
2439 marked++;
2440 }
2441 po=po->next;
2442 }
2443
2444 if (i != cnt || cnt+marked != orig_cnt)
2445 die("mark_redundant_parents %d %d %d %d", orig_cnt, cnt, i, marked);
2446
2447 free_commit_list(h);
2448
2449 return marked;
2450}
2451
2452static int mark_treesame_root_parents(struct rev_info *revs, struct commit *commit)
2453{
2454 struct commit_list *p;
2455 int marked = 0;
2456
2457 for (p = commit->parents; p; p = p->next) {
2458 struct commit *parent = p->item;
2459 if (!parent->parents && (parent->object.flags & TREESAME(1u<<2))) {
2460 parent->object.flags |= TMP_MARK(1u<<4);
2461 marked++;
2462 }
2463 }
2464
2465 return marked;
2466}
2467
2468/*
2469 * Awkward naming - this means one parent we are TREESAME to.
2470 * cf mark_treesame_root_parents: root parents that are TREESAME (to an
2471 * empty tree). Better name suggestions?
2472 */
2473static int leave_one_treesame_to_parent(struct rev_info *revs, struct commit *commit)
2474{
2475 struct treesame_state *ts = lookup_decoration(&revs->treesame, &commit->object);
2476 struct commit *unmarked = NULL((void*)0), *marked = NULL((void*)0);
2477 struct commit_list *p;
2478 unsigned n;
2479
2480 for (p = commit->parents, n = 0; p; p = p->next, n++) {
2481 if (ts->treesame[n]) {
2482 if (p->item->object.flags & TMP_MARK(1u<<4)) {
2483 if (!marked)
2484 marked = p->item;
2485 } else {
2486 if (!unmarked) {
2487 unmarked = p->item;
2488 break;
2489 }
2490 }
2491 }
2492 }
2493
2494 /*
2495 * If we are TREESAME to a marked-for-deletion parent, but not to any
2496 * unmarked parents, unmark the first TREESAME parent. This is the
2497 * parent that the default simplify_history==1 scan would have followed,
2498 * and it doesn't make sense to omit that path when asking for a
2499 * simplified full history. Retaining it improves the chances of
2500 * understanding odd missed merges that took an old version of a file.
2501 *
2502 * Example:
2503 *
2504 * I--------*X A modified the file, but mainline merge X used
2505 * \ / "-s ours", so took the version from I. X is
2506 * `-*A--' TREESAME to I and !TREESAME to A.
2507 *
2508 * Default log from X would produce "I". Without this check,
2509 * --full-history --simplify-merges would produce "I-A-X", showing
2510 * the merge commit X and that it changed A, but not making clear that
2511 * it had just taken the I version. With this check, the topology above
2512 * is retained.
2513 *
2514 * Note that it is possible that the simplification chooses a different
2515 * TREESAME parent from the default, in which case this test doesn't
2516 * activate, and we _do_ drop the default parent. Example:
2517 *
2518 * I------X A modified the file, but it was reverted in B,
2519 * \ / meaning mainline merge X is TREESAME to both
2520 * *A-*B parents.
2521 *
2522 * Default log would produce "I" by following the first parent;
2523 * --full-history --simplify-merges will produce "I-A-B". But this is a
2524 * reasonable result - it presents a logical full history leading from
2525 * I to X, and X is not an important merge.
2526 */
2527 if (!unmarked && marked) {
2528 marked->object.flags &= ~TMP_MARK(1u<<4);
2529 return 1;
2530 }
2531
2532 return 0;
2533}
2534
2535static int remove_marked_parents(struct rev_info *revs, struct commit *commit)
2536{
2537 struct commit_list **pp, *p;
2538 int nth_parent, removed = 0;
2539
2540 pp = &commit->parents;
2541 nth_parent = 0;
2542 while ((p = *pp) != NULL((void*)0)) {
2543 struct commit *parent = p->item;
2544 if (parent->object.flags & TMP_MARK(1u<<4)) {
2545 parent->object.flags &= ~TMP_MARK(1u<<4);
2546 *pp = p->next;
2547 free(p);
2548 removed++;
2549 compact_treesame(revs, commit, nth_parent);
2550 continue;
2551 }
2552 pp = &p->next;
2553 nth_parent++;
2554 }
2555
2556 /* Removing parents can only increase TREESAMEness */
2557 if (removed && !(commit->object.flags & TREESAME(1u<<2)))
2558 update_treesame(revs, commit);
2559
2560 return nth_parent;
2561}
2562
2563static struct commit_list **simplify_one(struct rev_info *revs, struct commit *commit, struct commit_list **tail)
2564{
2565 struct commit_list *p;
2566 struct commit *parent;
2567 struct merge_simplify_state *st, *pst;
2568 int cnt;
2569
2570 st = locate_simplify_state(revs, commit);
2571
2572 /*
2573 * Have we handled this one?
2574 */
2575 if (st->simplified)
2576 return tail;
2577
2578 /*
2579 * An UNINTERESTING commit simplifies to itself, so does a
2580 * root commit. We do not rewrite parents of such commit
2581 * anyway.
2582 */
2583 if ((commit->object.flags & UNINTERESTING(1u<<1)) || !commit->parents) {
2584 st->simplified = commit;
2585 return tail;
2586 }
2587
2588 /*
2589 * Do we know what commit all of our parents that matter
2590 * should be rewritten to? Otherwise we are not ready to
2591 * rewrite this one yet.
2592 */
2593 for (cnt = 0, p = commit->parents; p; p = p->next) {
2594 pst = locate_simplify_state(revs, p->item);
2595 if (!pst->simplified) {
2596 tail = &commit_list_insert(p->item, tail)->next;
2597 cnt++;
2598 }
2599 if (revs->first_parent_only)
2600 break;
2601 }
2602 if (cnt) {
2603 tail = &commit_list_insert(commit, tail)->next;
2604 return tail;
2605 }
2606
2607 /*
2608 * Rewrite our list of parents. Note that this cannot
2609 * affect our TREESAME flags in any way - a commit is
2610 * always TREESAME to its simplification.
2611 */
2612 for (p = commit->parents; p; p = p->next) {
2613 pst = locate_simplify_state(revs, p->item);
2614 p->item = pst->simplified;
2615 if (revs->first_parent_only)
2616 break;
2617 }
2618
2619 if (revs->first_parent_only)
2620 cnt = 1;
2621 else
2622 cnt = remove_duplicate_parents(revs, commit);
2623
2624 /*
2625 * It is possible that we are a merge and one side branch
2626 * does not have any commit that touches the given paths;
2627 * in such a case, the immediate parent from that branch
2628 * will be rewritten to be the merge base.
2629 *
2630 * o----X X: the commit we are looking at;
2631 * / / o: a commit that touches the paths;
2632 * ---o----'
2633 *
2634 * Further, a merge of an independent branch that doesn't
2635 * touch the path will reduce to a treesame root parent:
2636 *
2637 * ----o----X X: the commit we are looking at;
2638 * / o: a commit that touches the paths;
2639 * r r: a root commit not touching the paths
2640 *
2641 * Detect and simplify both cases.
2642 */
2643 if (1 < cnt) {
2644 int marked = mark_redundant_parents(revs, commit);
2645 marked += mark_treesame_root_parents(revs, commit);
2646 if (marked)
2647 marked -= leave_one_treesame_to_parent(revs, commit);
2648 if (marked)
2649 cnt = remove_marked_parents(revs, commit);
2650 }
2651
2652 /*
2653 * A commit simplifies to itself if it is a root, if it is
2654 * UNINTERESTING, if it touches the given paths, or if it is a
2655 * merge and its parents don't simplify to one relevant commit
2656 * (the first two cases are already handled at the beginning of
2657 * this function).
2658 *
2659 * Otherwise, it simplifies to what its sole relevant parent
2660 * simplifies to.
2661 */
2662 if (!cnt ||
2663 (commit->object.flags & UNINTERESTING(1u<<1)) ||
2664 !(commit->object.flags & TREESAME(1u<<2)) ||
2665 (parent = one_relevant_parent(revs, commit->parents)) == NULL((void*)0))
2666 st->simplified = commit;
2667 else {
2668 pst = locate_simplify_state(revs, parent);
2669 st->simplified = pst->simplified;
2670 }
2671 return tail;
2672}
2673
2674static void simplify_merges(struct rev_info *revs)
2675{
2676 struct commit_list *list, *next;
2677 struct commit_list *yet_to_do, **tail;
2678 struct commit *commit;
2679
2680 if (!revs->prune)
2681 return;
2682
2683 /* feed the list reversed */
2684 yet_to_do = NULL((void*)0);
2685 for (list = revs->commits; list; list = next) {
2686 commit = list->item;
2687 next = list->next;
2688 /*
2689 * Do not free(list) here yet; the original list
2690 * is used later in this function.
2691 */
2692 commit_list_insert(commit, &yet_to_do);
2693 }
2694 while (yet_to_do) {
2695 list = yet_to_do;
2696 yet_to_do = NULL((void*)0);
2697 tail = &yet_to_do;
2698 while (list) {
2699 commit = pop_commit(&list);
2700 tail = simplify_one(revs, commit, tail);
2701 }
2702 }
2703
2704 /* clean up the result, removing the simplified ones */
2705 list = revs->commits;
2706 revs->commits = NULL((void*)0);
2707 tail = &revs->commits;
2708 while (list) {
2709 struct merge_simplify_state *st;
2710
2711 commit = pop_commit(&list);
2712 st = locate_simplify_state(revs, commit);
2713 if (st->simplified == commit)
2714 tail = &commit_list_insert(commit, tail)->next;
2715 }
2716}
2717
2718static void set_children(struct rev_info *revs)
2719{
2720 struct commit_list *l;
2721 for (l = revs->commits; l; l = l->next) {
2722 struct commit *commit = l->item;
2723 struct commit_list *p;
2724
2725 for (p = commit->parents; p; p = p->next)
2726 add_child(revs, p->item, commit);
2727 }
2728}
2729
2730void reset_revision_walk(void)
2731{
2732 clear_object_flags(SEEN(1u<<0) | ADDED(1u<<7) | SHOWN(1u<<3));
2733}
2734
2735int prepare_revision_walk(struct rev_info *revs)
2736{
2737 int i;
2738 struct object_array old_pending;
2739 struct commit_list **next = &revs->commits;
2740
2741 memcpy(&old_pending, &revs->pending, sizeof(old_pending))__builtin___memcpy_chk (&old_pending, &revs->pending
, sizeof(old_pending), __builtin_object_size (&old_pending
, 0));
2742 revs->pending.nr = 0;
2743 revs->pending.alloc = 0;
2744 revs->pending.objects = NULL((void*)0);
2745 for (i = 0; i < old_pending.nr; i++) {
2746 struct object_array_entry *e = old_pending.objects + i;
2747 struct commit *commit = handle_commit(revs, e);
2748 if (commit) {
2749 if (!(commit->object.flags & SEEN(1u<<0))) {
2750 commit->object.flags |= SEEN(1u<<0);
2751 next = commit_list_append(commit, next);
2752 }
2753 }
2754 }
2755 if (!revs->leak_pending)
2756 object_array_clear(&old_pending);
2757
2758 /* Signal whether we need per-parent treesame decoration */
2759 if (revs->simplify_merges ||
2760 (revs->limited && limiting_can_increase_treesame(revs)))
2761 revs->treesame.name = "treesame";
2762
2763 if (revs->no_walk != REVISION_WALK_NO_WALK_UNSORTED2)
2764 commit_list_sort_by_date(&revs->commits);
2765 if (revs->no_walk)
2766 return 0;
2767 if (revs->limited)
2768 if (limit_list(revs) < 0)
2769 return -1;
2770 if (revs->topo_order)
2771 sort_in_topological_order(&revs->commits, revs->sort_order);
2772 if (revs->line_level_traverse)
2773 line_log_filter(revs);
2774 if (revs->simplify_merges)
2775 simplify_merges(revs);
2776 if (revs->children.name)
2777 set_children(revs);
2778 return 0;
2779}
2780
2781static enum rewrite_result rewrite_one(struct rev_info *revs, struct commit **pp)
2782{
2783 struct commit_list *cache = NULL((void*)0);
2784
2785 for (;;) {
1
Loop condition is true. Entering loop body
→
7
←
Loop condition is true. Entering loop body
→
13
←
Loop condition is true. Entering loop body
→
19
←
Loop condition is true. Entering loop body
→
2786 struct commit *p = *pp;
2787 if (!revs->limited)
2
←
Taking false branch
→
8
←
Taking false branch
→
14
←
Taking false branch
→
20
←
Taking true branch
→
2788 if (add_parents_to_list(revs, p, &revs->commits, &cache) < 0)
21
←
Calling 'add_parents_to_list'
→
2789 return rewrite_one_error;
2790 if (p->object.flags & UNINTERESTING(1u<<1))
3
←
Taking false branch
→
9
←
Taking false branch
→
15
←
Taking false branch
→
2791 return rewrite_one_ok;
2792 if (!(p->object.flags & TREESAME(1u<<2)))
4
←
Taking false branch
→
10
←
Taking false branch
→
16
←
Taking false branch
→
2793 return rewrite_one_ok;
2794 if (!p->parents)
5
←
Taking false branch
→
11
←
Taking false branch
→
17
←
Taking false branch
→
2795 return rewrite_one_noparents;
2796 if ((p = one_relevant_parent(revs, p->parents)) == NULL((void*)0))
6
←
Taking false branch
→
12
←
Taking false branch
→
18
←
Taking false branch
→
2797 return rewrite_one_ok;
2798 *pp = p;
2799 }
2800}
2801
2802int rewrite_parents(struct rev_info *revs, struct commit *commit,
2803 rewrite_parent_fn_t rewrite_parent)
2804{
2805 struct commit_list **pp = &commit->parents;
2806 while (*pp) {
2807 struct commit_list *parent = *pp;
2808 switch (rewrite_parent(revs, &parent->item)) {
2809 case rewrite_one_ok:
2810 break;
2811 case rewrite_one_noparents:
2812 *pp = parent->next;
2813 continue;
2814 case rewrite_one_error:
2815 return -1;
2816 }
2817 pp = &parent->next;
2818 }
2819 remove_duplicate_parents(revs, commit);
2820 return 0;
2821}
2822
2823static int commit_rewrite_person(struct strbuf *buf, const char *what, struct string_list *mailmap)
2824{
2825 char *person, *endp;
2826 size_t len, namelen, maillen;
2827 const char *name;
2828 const char *mail;
2829 struct ident_split ident;
2830
2831 person = strstr(buf->buf, what);
2832 if (!person)
2833 return 0;
2834
2835 person += strlen(what);
2836 endp = strchr(person, '\n');
2837 if (!endp)
2838 return 0;
2839
2840 len = endp - person;
2841
2842 if (split_ident_line(&ident, person, len))
2843 return 0;
2844
2845 mail = ident.mail_begin;
2846 maillen = ident.mail_end - ident.mail_begin;
2847 name = ident.name_begin;
2848 namelen = ident.name_end - ident.name_begin;
2849
2850 if (map_user(mailmap, &mail, &maillen, &name, &namelen)) {
2851 struct strbuf namemail = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
2852
2853 strbuf_addf(&namemail, "%.*s <%.*s>",
2854 (int)namelen, name, (int)maillen, mail);
2855
2856 strbuf_splice(buf, ident.name_begin - buf->buf,
2857 ident.mail_end - ident.name_begin + 1,
2858 namemail.buf, namemail.len);
2859
2860 strbuf_release(&namemail);
2861
2862 return 1;
2863 }
2864
2865 return 0;
2866}
2867
2868static int commit_match(struct commit *commit, struct rev_info *opt)
2869{
2870 int retval;
2871 const char *encoding;
2872 const char *message;
2873 struct strbuf buf = STRBUF_INIT{ 0, 0, strbuf_slopbuf };
2874
2875 if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list)
2876 return 1;
2877
2878 /* Prepend "fake" headers as needed */
2879 if (opt->grep_filter.use_reflog_filter) {
2880 strbuf_addstr(&buf, "reflog ");
2881 get_reflog_message(&buf, opt->reflog_info);
2882 strbuf_addch(&buf, '\n');
2883 }
2884
2885 /*
2886 * We grep in the user's output encoding, under the assumption that it
2887 * is the encoding they are most likely to write their grep pattern
2888 * for. In addition, it means we will match the "notes" encoding below,
2889 * so we will not end up with a buffer that has two different encodings
2890 * in it.
2891 */
2892 encoding = get_log_output_encoding();
2893 message = logmsg_reencode(commit, NULL((void*)0), encoding);
2894
2895 /* Copy the commit to temporary if we are using "fake" headers */
2896 if (buf.len)
2897 strbuf_addstr(&buf, message);
2898
2899 if (opt->grep_filter.header_list && opt->mailmap) {
2900 if (!buf.len)
2901 strbuf_addstr(&buf, message);
2902
2903 commit_rewrite_person(&buf, "\nauthor ", opt->mailmap);
2904 commit_rewrite_person(&buf, "\ncommitter ", opt->mailmap);
2905 }
2906
2907 /* Append "fake" message parts as needed */
2908 if (opt->show_notes) {
2909 if (!buf.len)
2910 strbuf_addstr(&buf, message);
2911 format_display_notes(commit->object.oid.hash, &buf, encoding, 1);
2912 }
2913
2914 /*
2915 * Find either in the original commit message, or in the temporary.
2916 * Note that we cast away the constness of "message" here. It is
2917 * const because it may come from the cached commit buffer. That's OK,
2918 * because we know that it is modifiable heap memory, and that while
2919 * grep_buffer may modify it for speed, it will restore any
2920 * changes before returning.
2921 */
2922 if (buf.len)
2923 retval = grep_buffer(&opt->grep_filter, buf.buf, buf.len);
2924 else
2925 retval = grep_buffer(&opt->grep_filter,
2926 (char *)message, strlen(message));
2927 strbuf_release(&buf);
2928 unuse_commit_buffer(commit, message);
2929 return opt->invert_grep ? !retval : retval;
2930}
2931
2932static inline int want_ancestry(const struct rev_info *revs)
2933{
2934 return (revs->rewrite_parents || revs->children.name);
2935}
2936
2937enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit)
2938{
2939 if (commit->object.flags & SHOWN(1u<<3))
2940 return commit_ignore;
2941 if (revs->unpacked && has_sha1_pack(commit->object.oid.hash))
2942 return commit_ignore;
2943 if (revs->show_all)
2944 return commit_show;
2945 if (commit->object.flags & UNINTERESTING(1u<<1))
2946 return commit_ignore;
2947 if (revs->min_age != -1 && (commit->date > revs->min_age))
2948 return commit_ignore;
2949 if (revs->min_parents || (revs->max_parents >= 0)) {
2950 int n = commit_list_count(commit->parents);
2951 if ((n < revs->min_parents) ||
2952 ((revs->max_parents >= 0) && (n > revs->max_parents)))
2953 return commit_ignore;
2954 }
2955 if (!commit_match(commit, revs))
2956 return commit_ignore;
2957 if (revs->prune && revs->dense) {
2958 /* Commit without changes? */
2959 if (commit->object.flags & TREESAME(1u<<2)) {
2960 int n;
2961 struct commit_list *p;
2962 /* drop merges unless we want parenthood */
2963 if (!want_ancestry(revs))
2964 return commit_ignore;
2965 /*
2966 * If we want ancestry, then need to keep any merges
2967 * between relevant commits to tie together topology.
2968 * For consistency with TREESAME and simplification
2969 * use "relevant" here rather than just INTERESTING,
2970 * to treat bottom commit(s) as part of the topology.
2971 */
2972 for (n = 0, p = commit->parents; p; p = p->next)
2973 if (relevant_commit(p->item))
2974 if (++n >= 2)
2975 return commit_show;
2976 return commit_ignore;
2977 }
2978 }
2979 return commit_show;
2980}
2981
2982define_commit_slab(saved_parents, struct commit_list *)struct saved_parents { unsigned slab_size; unsigned stride; unsigned
slab_count; struct commit_list * **slab; }; static int stat_saved_parentsrealloc
; static __attribute__((__unused__)) void init_saved_parents_with_stride
(struct saved_parents *s, unsigned stride) { unsigned int elem_size
; if (!stride) stride = 1; s->stride = stride; elem_size =
sizeof(struct commit_list *) * stride; s->slab_size = (512
*1024-32) / elem_size; s->slab_count = 0; s->slab = ((void
*)0); } static __attribute__((__unused__)) void init_saved_parents
(struct saved_parents *s) { init_saved_parents_with_stride(s,
1); } static __attribute__((__unused__)) void clear_saved_parents
(struct saved_parents *s) { int i; for (i = 0; i < s->slab_count
; i++) free(s->slab[i]); s->slab_count = 0; free(s->
slab); s->slab = ((void*)0); } static __attribute__((__unused__
)) struct commit_list * *saved_parents_at_peek(struct saved_parents
*s, const struct commit *c, int add_if_missing) { int nth_slab
, nth_slot; nth_slab = c->index / s->slab_size; nth_slot
= c->index % s->slab_size; if (s->slab_count <= nth_slab
) { int i; if (!add_if_missing) return ((void*)0); (s->slab
) = xrealloc((s->slab), st_mult(sizeof(*(s->slab)), (nth_slab
+ 1))); stat_saved_parentsrealloc++; for (i = s->slab_count
; i <= nth_slab; i++) s->slab[i] = ((void*)0); s->slab_count
= nth_slab + 1; } if (!s->slab[nth_slab]) { if (!add_if_missing
) return ((void*)0); s->slab[nth_slab] = xcalloc(s->slab_size
, sizeof(**s->slab) * s->stride); } return &s->slab
[nth_slab][nth_slot * s->stride]; } static __attribute__((
__unused__)) struct commit_list * *saved_parents_at(struct saved_parents
*s, const struct commit *c) { return saved_parents_at_peek(s
, c, 1); } static __attribute__((__unused__)) struct commit_list
* *saved_parents_peek(struct saved_parents *s, const struct commit
*c) { return saved_parents_at_peek(s, c, 0); } struct saved_parents;
2983
2984#define EMPTY_PARENT_LIST((struct commit_list *)-1) ((struct commit_list *)-1)
2985
2986/*
2987 * You may only call save_parents() once per commit (this is checked
2988 * for non-root commits).
2989 */
2990static void save_parents(struct rev_info *revs, struct commit *commit)
2991{
2992 struct commit_list **pp;
2993
2994 if (!revs->saved_parents_slab) {
2995 revs->saved_parents_slab = xmalloc(sizeof(struct saved_parents));
2996 init_saved_parents(revs->saved_parents_slab);
2997 }
2998
2999 pp = saved_parents_at(revs->saved_parents_slab, commit);
3000
3001 /*
3002 * When walking with reflogs, we may visit the same commit
3003 * several times: once for each appearance in the reflog.
3004 *
3005 * In this case, save_parents() will be called multiple times.
3006 * We want to keep only the first set of parents. We need to
3007 * store a sentinel value for an empty (i.e., NULL) parent
3008 * list to distinguish it from a not-yet-saved list, however.
3009 */
3010 if (*pp)
3011 return;
3012 if (commit->parents)
3013 *pp = copy_commit_list(commit->parents);
3014 else
3015 *pp = EMPTY_PARENT_LIST((struct commit_list *)-1);
3016}
3017
3018static void free_saved_parents(struct rev_info *revs)
3019{
3020 if (revs->saved_parents_slab)
3021 clear_saved_parents(revs->saved_parents_slab);
3022}
3023
3024struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit)
3025{
3026 struct commit_list *parents;
3027
3028 if (!revs->saved_parents_slab)
3029 return commit->parents;
3030
3031 parents = *saved_parents_at(revs->saved_parents_slab, commit);
3032 if (parents == EMPTY_PARENT_LIST((struct commit_list *)-1))
3033 return NULL((void*)0);
3034 return parents;
3035}
3036
3037enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
3038{
3039 enum commit_action action = get_commit_action(revs, commit);
3040
3041 if (action == commit_show &&
3042 !revs->show_all &&
3043 revs->prune && revs->dense && want_ancestry(revs)) {
3044 /*
3045 * --full-diff on simplified parents is no good: it
3046 * will show spurious changes from the commits that
3047 * were elided. So we save the parents on the side
3048 * when --full-diff is in effect.
3049 */
3050 if (revs->full_diff)
3051 save_parents(revs, commit);
3052 if (rewrite_parents(revs, commit, rewrite_one) < 0)
3053 return commit_error;
3054 }
3055 return action;
3056}
3057
3058static void track_linear(struct rev_info *revs, struct commit *commit)
3059{
3060 if (revs->track_first_time) {
3061 revs->linear = 1;
3062 revs->track_first_time = 0;
3063 } else {
3064 struct commit_list *p;
3065 for (p = revs->previous_parents; p; p = p->next)
3066 if (p->item == NULL((void*)0) || /* first commit */
3067 !oidcmp(&p->item->object.oid, &commit->object.oid))
3068 break;
3069 revs->linear = p != NULL((void*)0);
3070 }
3071 if (revs->reverse) {
3072 if (revs->linear)
3073 commit->object.flags |= TRACK_LINEAR(1u<<26);
3074 }
3075 free_commit_list(revs->previous_parents);
3076 revs->previous_parents = copy_commit_list(commit->parents);
3077}
3078
3079static struct commit *get_revision_1(struct rev_info *revs)
3080{
3081 if (!revs->commits)
3082 return NULL((void*)0);
3083
3084 do {
3085 struct commit *commit = pop_commit(&revs->commits);
3086
3087 if (revs->reflog_info) {
3088 save_parents(revs, commit);
3089 fake_reflog_parent(revs->reflog_info, commit);
3090 commit->object.flags &= ~(ADDED(1u<<7) | SEEN(1u<<0) | SHOWN(1u<<3));
3091 }
3092
3093 /*
3094 * If we haven't done the list limiting, we need to look at
3095 * the parents here. We also need to do the date-based limiting
3096 * that we'd otherwise have done in limit_list().
3097 */
3098 if (!revs->limited) {
3099 if (revs->max_age != -1 &&
3100 (commit->date < revs->max_age))
3101 continue;
3102 if (add_parents_to_list(revs, commit, &revs->commits, NULL((void*)0)) < 0) {
3103 if (!revs->ignore_missing_links)
3104 die("Failed to traverse parents of commit %s",
3105 oid_to_hex(&commit->object.oid));
3106 }
3107 }
3108
3109 switch (simplify_commit(revs, commit)) {
3110 case commit_ignore:
3111 continue;
3112 case commit_error:
3113 die("Failed to simplify parents of commit %s",
3114 oid_to_hex(&commit->object.oid));
3115 default:
3116 if (revs->track_linear)
3117 track_linear(revs, commit);
3118 return commit;
3119 }
3120 } while (revs->commits);
3121 return NULL((void*)0);
3122}
3123
3124/*
3125 * Return true for entries that have not yet been shown. (This is an
3126 * object_array_each_func_t.)
3127 */
3128static int entry_unshown(struct object_array_entry *entry, void *cb_data_unused)
3129{
3130 return !(entry->item->flags & SHOWN(1u<<3));
3131}
3132
3133/*
3134 * If array is on the verge of a realloc, garbage-collect any entries
3135 * that have already been shown to try to free up some space.
3136 */
3137static void gc_boundary(struct object_array *array)
3138{
3139 if (array->nr == array->alloc)
3140 object_array_filter(array, entry_unshown, NULL((void*)0));
3141}
3142
3143static void create_boundary_commit_list(struct rev_info *revs)
3144{
3145 unsigned i;
3146 struct commit *c;
3147 struct object_array *array = &revs->boundary_commits;
3148 struct object_array_entry *objects = array->objects;
3149
3150 /*
3151 * If revs->commits is non-NULL at this point, an error occurred in
3152 * get_revision_1(). Ignore the error and continue printing the
3153 * boundary commits anyway. (This is what the code has always
3154 * done.)
3155 */
3156 if (revs->commits) {
3157 free_commit_list(revs->commits);
3158 revs->commits = NULL((void*)0);
3159 }
3160
3161 /*
3162 * Put all of the actual boundary commits from revs->boundary_commits
3163 * into revs->commits
3164 */
3165 for (i = 0; i < array->nr; i++) {
3166 c = (struct commit *)(objects[i].item);
3167 if (!c)
3168 continue;
3169 if (!(c->object.flags & CHILD_SHOWN(1u<<6)))
3170 continue;
3171 if (c->object.flags & (SHOWN(1u<<3) | BOUNDARY(1u<<5)))
3172 continue;
3173 c->object.flags |= BOUNDARY(1u<<5);
3174 commit_list_insert(c, &revs->commits);
3175 }
3176
3177 /*
3178 * If revs->topo_order is set, sort the boundary commits
3179 * in topological order
3180 */
3181 sort_in_topological_order(&revs->commits, revs->sort_order);
3182}
3183
3184static struct commit *get_revision_internal(struct rev_info *revs)
3185{
3186 struct commit *c = NULL((void*)0);
3187 struct commit_list *l;
3188
3189 if (revs->boundary == 2) {
3190 /*
3191 * All of the normal commits have already been returned,
3192 * and we are now returning boundary commits.
3193 * create_boundary_commit_list() has populated
3194 * revs->commits with the remaining commits to return.
3195 */
3196 c = pop_commit(&revs->commits);
3197 if (c)
3198 c->object.flags |= SHOWN(1u<<3);
3199 return c;
3200 }
3201
3202 /*
3203 * If our max_count counter has reached zero, then we are done. We
3204 * don't simply return NULL because we still might need to show
3205 * boundary commits. But we want to avoid calling get_revision_1, which
3206 * might do a considerable amount of work finding the next commit only
3207 * for us to throw it away.
3208 *
3209 * If it is non-zero, then either we don't have a max_count at all
3210 * (-1), or it is still counting, in which case we decrement.
3211 */
3212 if (revs->max_count) {
3213 c = get_revision_1(revs);
3214 if (c) {
3215 while (revs->skip_count > 0) {
3216 revs->skip_count--;
3217 c = get_revision_1(revs);
3218 if (!c)
3219 break;
3220 }
3221 }
3222
3223 if (revs->max_count > 0)
3224 revs->max_count--;
3225 }
3226
3227 if (c)
3228 c->object.flags |= SHOWN(1u<<3);
3229
3230 if (!revs->boundary)
3231 return c;
3232
3233 if (!c) {
3234 /*
3235 * get_revision_1() runs out the commits, and
3236 * we are done computing the boundaries.
3237 * switch to boundary commits output mode.
3238 */
3239 revs->boundary = 2;
3240
3241 /*
3242 * Update revs->commits to contain the list of
3243 * boundary commits.
3244 */
3245 create_boundary_commit_list(revs);
3246
3247 return get_revision_internal(revs);
3248 }
3249
3250 /*
3251 * boundary commits are the commits that are parents of the
3252 * ones we got from get_revision_1() but they themselves are
3253 * not returned from get_revision_1(). Before returning
3254 * 'c', we need to mark its parents that they could be boundaries.
3255 */
3256
3257 for (l = c->parents; l; l = l->next) {
3258 struct object *p;
3259 p = &(l->item->object);
3260 if (p->flags & (CHILD_SHOWN(1u<<6) | SHOWN(1u<<3)))
3261 continue;
3262 p->flags |= CHILD_SHOWN(1u<<6);
3263 gc_boundary(&revs->boundary_commits);
3264 add_object_array(p, NULL((void*)0), &revs->boundary_commits);
3265 }
3266
3267 return c;
3268}
3269
3270struct commit *get_revision(struct rev_info *revs)
3271{
3272 struct commit *c;
3273 struct commit_list *reversed;
3274
3275 if (revs->reverse) {
3276 reversed = NULL((void*)0);
3277 while ((c = get_revision_internal(revs)))
3278 commit_list_insert(c, &reversed);
3279 revs->commits = reversed;
3280 revs->reverse = 0;
3281 revs->reverse_output_stage = 1;
3282 }
3283
3284 if (revs->reverse_output_stage) {
3285 c = pop_commit(&revs->commits);
3286 if (revs->track_linear)
3287 revs->linear = !!(c && c->object.flags & TRACK_LINEAR(1u<<26));
3288 return c;
3289 }
3290
3291 c = get_revision_internal(revs);
3292 if (c && revs->graph)
3293 graph_update(revs->graph, c);
3294 if (!c) {
3295 free_saved_parents(revs);
3296 if (revs->previous_parents) {
3297 free_commit_list(revs->previous_parents);
3298 revs->previous_parents = NULL((void*)0);
3299 }
3300 }
3301 return c;
3302}
3303
3304char *get_revision_mark(const struct rev_info *revs, const struct commit *commit)
3305{
3306 if (commit->object.flags & BOUNDARY(1u<<5))
3307 return "-";
3308 else if (commit->object.flags & UNINTERESTING(1u<<1))
3309 return "^";
3310 else if (commit->object.flags & PATCHSAME(1u<<9))
3311 return "=";
3312 else if (!revs || revs->left_right) {
3313 if (commit->object.flags & SYMMETRIC_LEFT(1u<<8))
3314 return "<";
3315 else
3316 return ">";
3317 } else if (revs->graph)
3318 return "*";
3319 else if (revs->cherry_mark)
3320 return "+";
3321 return "";
3322}
3323
3324void put_revision_mark(const struct rev_info *revs, const struct commit *commit)
3325{
3326 char *mark = get_revision_mark(revs, commit);
3327 if (!strlen(mark))
3328 return;
3329 fputs(mark, stdout__stdoutp);
3330 putchar(' ');
3331}