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authorJeff King <peff@peff.net>2014-06-10 17:39:30 -0400
committerJunio C Hamano <gitster@pobox.com>2014-06-12 10:29:43 -0700
commitb000c59b0c80fc187e5e0e48dc9396cd60576c4e (patch)
treeeceae4f00fdd8ddc384ec7d04739686e7b3ea4e1 /revision.c
parent10322a0aaf84382d8901f9ab59e59c39f0c035bb (diff)
downloadgit-b000c59b0c80fc187e5e0e48dc9396cd60576c4e.tar.gz
git-b000c59b0c80fc187e5e0e48dc9396cd60576c4e.tar.xz
logmsg_reencode: return const buffer
The return value from logmsg_reencode may be either a newly allocated buffer or a pointer to the existing commit->buffer. We would not want the caller to accidentally free() or modify the latter, so let's mark it as const. We can cast away the constness in logmsg_free, but only once we have determined that it is a free-able buffer. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'revision.c')
-rw-r--r--revision.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/revision.c b/revision.c
index 71e233742..be151ef46 100644
--- a/revision.c
+++ b/revision.c
@@ -2788,7 +2788,7 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
{
int retval;
const char *encoding;
- char *message;
+ const char *message;
struct strbuf buf = STRBUF_INIT;
if (!opt->grep_filter.pattern_list && !opt->grep_filter.header_list)
@@ -2830,12 +2830,19 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
format_display_notes(commit->object.sha1, &buf, encoding, 1);
}
- /* Find either in the original commit message, or in the temporary */
+ /*
+ * Find either in the original commit message, or in the temporary.
+ * Note that we cast away the constness of "message" here. It is
+ * const because it may come from the cached commit buffer. That's OK,
+ * because we know that it is modifiable heap memory, and that while
+ * grep_buffer may modify it for speed, it will restore any
+ * changes before returning.
+ */
if (buf.len)
retval = grep_buffer(&opt->grep_filter, buf.buf, buf.len);
else
retval = grep_buffer(&opt->grep_filter,
- message, strlen(message));
+ (char *)message, strlen(message));
strbuf_release(&buf);
logmsg_free(message, commit);
return retval;