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commit: implement commit_list_contains() 

It can be helpful to check if a commit_list contains a commit. Use
pointer equality, assuming lookup_commit() was used.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Derrick Stolee 2020-12-08 17:04:13 -05:00 committed by Junio C Hamano
parent ed03a58b65
commit 597b2c39af
2 changed files with 13 additions and 0 deletions
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11
commit.c
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@ -544,6 +544,17 @@ struct commit_list *commit_list_insert(struct commit *item, struct commit_list *
return new_list;
}

int commit_list_contains(struct commit *item, struct commit_list *list)
{
while (list) {
if (list->item == item)
return 1;
list = list->next;
}

return 0;
}

unsigned commit_list_count(const struct commit_list *l)
{
unsigned c = 0;

2
commit.h
View File

@ -167,6 +167,8 @@ int find_commit_subject(const char *commit_buffer, const char **subject);

struct commit_list *commit_list_insert(struct commit *item,
struct commit_list **list);
int commit_list_contains(struct commit *item,
struct commit_list *list);
struct commit_list **commit_list_append(struct commit *commit,
struct commit_list **next);
unsigned commit_list_count(const struct commit_list *l);