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authorJeff King <peff@peff.net>2014-08-27 07:56:01 (GMT)
committerJunio C Hamano <gitster@pobox.com>2014-08-27 17:25:28 (GMT)
commitfe6eb7f2c506190c817407accf27834005a57f2b (patch)
treefde1f530c243bfa9b71762fe29862528320f7ec4 /commit.c
parent6c4ab27f2378ce67940b4496365043119d7ffff2 (diff)
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commit: provide a function to find a header in a buffer
Usually when we parse a commit, we read it line by line and handle each individual line (e.g., parse_commit and parse_commit_header). Sometimes, however, we only care about extracting a single header. Code in this situation is stuck doing an ad-hoc parse of the commit buffer. Let's provide a reusable function to locate a header within the commit. The code is modeled after pretty.c's get_header, which is used to extract the encoding. Since some callers may not have the "struct commit" to go along with the buffer, we drop that parameter. The only thing lost is a warning for truncated commits, but that's OK. This shouldn't happen in practice, and even if it does, there's no particular reason that this function needs to complain about it. It either finds the header it was asked for, or it doesn't (and in the latter case, the caller will typically complain). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'commit.c')
-rw-r--r--commit.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/commit.c b/commit.c
index ae7f2b1..b6ffd62 100644
--- a/commit.c
+++ b/commit.c
@@ -1660,3 +1660,25 @@ void print_commit_list(struct commit_list *list,
printf(format, sha1_to_hex(list->item->object.sha1));
}
}
+
+const char *find_commit_header(const char *msg, const char *key, size_t *out_len)
+{
+ int key_len = strlen(key);
+ const char *line = msg;
+
+ while (line) {
+ const char *eol = strchrnul(line, '\n');
+
+ if (line == eol)
+ return NULL;
+
+ if (eol - line > key_len &&
+ !strncmp(line, key, key_len) &&
+ line[key_len] == ' ') {
+ *out_len = eol - line - key_len - 1;
+ return line + key_len + 1;
+ }
+ line = *eol ? eol + 1 : NULL;
+ }
+ return NULL;
+}