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refactor merge_bases() as preparation to libify merge-base

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Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Johannes Schindelin 2006-06-29 15:16:46 +02:00 committed by Junio C Hamano
parent 75dedd5a21
commit 52cab8a084
1 changed files with 46 additions and 18 deletions
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64
merge-base.c
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@ -124,8 +124,6 @@ static struct commit *interesting(struct commit_list *list)
* to contaminate D and E. * to contaminate D and E.
*/ */
static int show_all = 0;
static void mark_reachable_commits(struct commit_list *result, static void mark_reachable_commits(struct commit_list *result,
struct commit_list *list) struct commit_list *list)
{ {
@ -167,34 +165,33 @@ static void mark_reachable_commits(struct commit_list *result,
} }
} }
static int merge_base(struct commit *rev1, struct commit *rev2) struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2)
{ {
struct commit_list *list = NULL; struct commit_list *list = NULL;
struct commit_list *result = NULL; struct commit_list *result = NULL;
struct commit_list *tmp = NULL; struct commit_list *tmp = NULL;
if (rev1 == rev2) { if (rev1 == rev2)
printf("%s\n", sha1_to_hex(rev1->object.sha1)); return commit_list_insert(rev1, &result);
return 0;
}
parse_commit(rev1); parse_commit(rev1);
parse_commit(rev2); parse_commit(rev2);
rev1->object.flags |= 1; rev1->object.flags |= PARENT1;
rev2->object.flags |= 2; rev2->object.flags |= PARENT2;
insert_by_date(rev1, &list); insert_by_date(rev1, &list);
insert_by_date(rev2, &list); insert_by_date(rev2, &list);
while (interesting(list)) { while (interesting(list)) {
struct commit *commit = list->item; struct commit *commit = list->item;
struct commit_list *parents; struct commit_list *parents;
int flags = commit->object.flags & 7; int flags = commit->object.flags
& (PARENT1 | PARENT2 | UNINTERESTING);
tmp = list; tmp = list;
list = list->next; list = list->next;
free(tmp); free(tmp);
if (flags == 3) { if (flags == (PARENT1 | PARENT2)) {
insert_by_date(commit, &result); insert_by_date(commit, &result);
/* Mark parents of a found merge uninteresting */ /* Mark parents of a found merge uninteresting */
@ -213,21 +210,52 @@ static int merge_base(struct commit *rev1, struct commit *rev2)
} }
if (!result) if (!result)
return 1; return NULL;
if (result->next && list) if (result->next && list)
mark_reachable_commits(result, list); mark_reachable_commits(result, list);
/* cull duplicates */
for (tmp = result, list = NULL; tmp; ) {
struct commit *commit = tmp->item;
struct commit_list *next = tmp->next;
if (commit->object.flags & UNINTERESTING) {
if (list != NULL)
list->next = next;
free(tmp);
} else {
if (list == NULL)
result = tmp;
list = tmp;
commit->object.flags |= UNINTERESTING;
}
tmp = next;
}
/* reset flags */
clear_commit_marks(rev1, PARENT1 | PARENT2 | UNINTERESTING);
clear_commit_marks(rev2, PARENT1 | PARENT2 | UNINTERESTING);
return result;
}
static int show_all = 0;
static int merge_base(struct commit *rev1, struct commit *rev2)
{
struct commit_list *result = get_merge_bases(rev1, rev2);
if (!result)
return 1;
while (result) { while (result) {
struct commit *commit = result->item; printf("%s\n", sha1_to_hex(result->item->object.sha1));
result = result->next;
if (commit->object.flags & UNINTERESTING)
continue;
printf("%s\n", sha1_to_hex(commit->object.sha1));
if (!show_all) if (!show_all)
return 0; return 0;
commit->object.flags |= UNINTERESTING; result = result->next;
} }
return 0; return 0;
} }