[PATCH 08/10] Introduce get_octopus_merge_bases() in commit.c
From: Miklos Vajna <hidden>
Date: 2016-06-15 22:44:43
Subsystem:
the rest · Maintainer:
Linus Torvalds
This is like get_merge_bases() but it works for multiple heads, like show-branch --merge-base. Signed-off-by: Miklos Vajna <redacted> --- commit.c | 32 ++++++++++++++++++++++++++++++++ commit.h | 1 + 2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/commit.c b/commit.c
index bbf9c75..13fa39d 100644
--- a/commit.c
+++ b/commit.c@@ -600,6 +600,38 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two) return result; } +struct commit_list *get_octopus_merge_bases(struct commit_list *in, int cleanup) +{ + struct commit_list *i, *j, *k, *ret = NULL; + + for (i = in; i; i = i->next) { + if (!ret) + commit_list_append(i->item, &ret); + else { + struct commit_list *new = NULL, *end = NULL; + + for (j = ret; j; j = j->next) { + struct commit_list *bases; + bases = get_merge_bases(i->item, j->item, cleanup); + /* + * Now we just append bases to new, but + * calling commit_list_append() for each + * item would be expensive, so do it by + * hand. + */ + if (!new) + new = bases; + else + end->next = bases; + for (k = bases; k; k = k->next) + end = k; + } + ret = new; + } + } + return ret; +} + struct commit_list *get_merge_bases(struct commit *one, struct commit *two, int cleanup) {
diff --git a/commit.h b/commit.h
index 7f8c5ee..ca858ed 100644
--- a/commit.h
+++ b/commit.h@@ -121,6 +121,7 @@ int read_graft_file(const char *graft_file); struct commit_graft *lookup_commit_graft(const unsigned char *sha1); extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup); +extern struct commit_list *get_octopus_merge_bases(struct commit_list *in, int cleanup); extern int register_shallow(const unsigned char *sha1); extern int unregister_shallow(const unsigned char *sha1);
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1.5.6.rc2.dirty