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

Signed-off-by: Antoine Pelisse <apeli...@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

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