[PATCH 02/14] revert: Inline add_message_to_msg function

[Ramkumar Ramachandra <artagnon@gmail.com>]

The add_message_to_msg function is poorly implemented, has an unclear
API, and only one callsite.  Replace the callsite with a cleaner
implementation.  Additionally, fix a bug introduced in 9509af6 (Make
git-revert & git-cherry-pick a builtin, 2007-03-01) -- a NULL pointer
was being incremented when "\n\n" was not found in "message".

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 builtin/revert.c |   20 ++++++--------------
 1 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/builtin/revert.c b/builtin/revert.c
index 1f27c63..19d604c 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -185,19 +185,6 @@ static char *get_encoding(const char *message)
 	return NULL;
 }
 
-static void add_message_to_msg(struct strbuf *msgbuf, const char *message)
-{
-	const char *p = message;
-	while (*p && (*p != '\n' || p[1] != '\n'))
-		p++;
-
-	if (!*p)
-		strbuf_addstr(msgbuf, sha1_to_hex(commit->object.sha1));
-
-	p += 2;
-	strbuf_addstr(msgbuf, p);
-}
-
 static void write_cherry_pick_head(void)
 {
 	int fd;
@@ -471,11 +458,16 @@ static int do_pick_commit(void)
 		}
 		strbuf_addstr(&msgbuf, ".\n");
 	} else {
+		const char *p = strstr(msg.message, "\n\n");
+
 		base = parent;
 		base_label = msg.parent_label;
 		next = commit;
 		next_label = msg.label;
-		add_message_to_msg(&msgbuf, msg.message);
+
+		p = p ? p + 2 : sha1_to_hex(commit->object.sha1);
+		strbuf_addstr(&msgbuf, p);
+
 		if (no_replay) {
 			strbuf_addstr(&msgbuf, "(cherry picked from commit ");
 			strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
-- 
1.7.5.GIT