The purpose of skip_prefix() is much clearer than memcmp(). Also
skip_prefix() takes one less argument and its return value makes more
sense.
Signed-off-by: Yuxuan Shui <yshuiv7@xxxxxxxxx>
---
fsck.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)
diff --git a/fsck.c b/fsck.c
index 1789c34..7e6b829 100644
--- a/fsck.c
+++ b/fsck.c
@@ -281,7 +281,7 @@ static int fsck_ident(const char **ident, struct object *obj, fsck_error error_f
static int fsck_commit(struct commit *commit, fsck_error error_func)
{
- char *buffer = commit->buffer;
+ const char *buffer = commit->buffer, *tmp;
unsigned char tree_sha1[20], sha1[20];
struct commit_graft *graft;
int parents = 0;
@@ -290,15 +290,17 @@ static int fsck_commit(struct commit *commit, fsck_error error_func)
if (commit->date == ULONG_MAX)
return error_func(&commit->object, FSCK_ERROR, "invalid author/committer line");
- if (memcmp(buffer, "tree ", 5))
+ buffer = skip_prefix(buffer, "tree ");
+ if (buffer == NULL)
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'tree' line");
- if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
+ if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n')
return error_func(&commit->object, FSCK_ERROR, "invalid 'tree' line format - bad sha1");
- buffer += 46;
- while (!memcmp(buffer, "parent ", 7)) {
- if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
+ buffer += 41;
+ while ((tmp = skip_prefix(buffer, "parent "))) {
+ buffer = tmp;
+ if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n')
return error_func(&commit->object, FSCK_ERROR, "invalid 'parent' line format - bad sha1");
- buffer += 48;
+ buffer += 41;
parents++;
}
graft = lookup_commit_graft(commit->object.sha1);
@@ -322,15 +324,15 @@ static int fsck_commit(struct commit *commit, fsck_error error_func)
if (p || parents)
return error_func(&commit->object, FSCK_ERROR, "parent objects missing");
}
- if (memcmp(buffer, "author ", 7))
+ buffer = skip_prefix(buffer, "author ");
+ if (buffer == NULL)
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'author' line");
- buffer += 7;
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
- if (memcmp(buffer, "committer ", strlen("committer ")))
+ buffer = skip_prefix(buffer, "committer ");
+ if (buffer == NULL)
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'committer' line");
- buffer += strlen("committer ");
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
--
1.9.0
--
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