[PATCH v2 2/7] mailmap: Remove buffer length limit in map_user

[Antoine Pelisse <apelisse@gmail.com>]

Remove the hard limit set by mail buffer in map_user and
use the strbuf API to replace it.

Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
---
 mailmap.c |   17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/mailmap.c b/mailmap.c
index ea4b471..3bc6491 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -193,7 +193,7 @@ int map_user(struct string_list *map,
 	char *end_of_email;
 	struct string_list_item *item;
 	struct mailmap_entry *me;
-	char buf[1024], *mailbuf;
+	struct strbuf mailbuf = STRBUF_INIT;
 	int i;
 
 	/* figure out space requirement for email */
@@ -204,18 +204,14 @@ int map_user(struct string_list *map,
 		if (!end_of_email)
 			return 0;
 	}
-	if (end_of_email - email + 1 < sizeof(buf))
-		mailbuf = buf;
-	else
-		mailbuf = xmalloc(end_of_email - email + 1);
 
 	/* downcase the email address */
+	strbuf_grow(&mailbuf, end_of_email - email);
 	for (i = 0; i < end_of_email - email; i++)
-		mailbuf[i] = tolower(email[i]);
-	mailbuf[i] = 0;
+		strbuf_addch(&mailbuf, tolower(email[i]));
 
-	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf);
-	item = string_list_lookup(map, mailbuf);
+	debug_mm("map_user: map '%s' <%s>\n", name, mailbuf.buf);
+	item = string_list_lookup(map, mailbuf.buf);
 	if (item != NULL) {
 		me = (struct mailmap_entry *)item->util;
 		if (me->namemap.nr) {
@@ -226,8 +222,7 @@ int map_user(struct string_list *map,
 				item = subitem;
 		}
 	}
-	if (mailbuf != buf)
-		free(mailbuf);
+	strbuf_release(&mailbuf);
 	if (item != NULL) {
 		struct mailmap_info *mi = (struct mailmap_info *)item->util;
 		if (mi->name == NULL && (mi->email == NULL || maxlen_email == 0)) {
-- 
1.7.9.5