fmt-merge-msg: don't use static buffer in record_person

The record_person function just parses out the "name" field
of the person line in a commit and adds it to a string_list.
The only reason we need an extra buffer is that the
string_list functions require a NUL-terminated string.

Instead of the static buffer, we can just allocate a
temporary NUL-terminated copy. In addition to removing a
useless limit, this removes the only user of MAX_GITNAME
outside of ident.c.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index a517f1794a1c1bcc0939ad8b81d482356c20d2ba..4ee6a88d754c3a64dd562ae835779c7ee5c660e5 100644 (file)
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -230,7 +230,7 @@ static void add_branch_desc(struct strbuf *out, const char *name)
 static void record_person(int which, struct string_list *people,
                          struct commit *commit)
 {
-       char name_buf[MAX_GITNAME], *name, *name_end;
+       char *name_buf, *name, *name_end;
        struct string_list_item *elem;
        const char *field = (which == 'a') ? "\nauthor " : "\ncommitter ";
 
@@ -243,10 +243,9 @@ static void record_person(int which, struct string_list *people,
                name_end--;
        while (isspace(*name_end) && name <= name_end)
                name_end--;
-       if (name_end < name || name + MAX_GITNAME <= name_end)
+       if (name_end < name)
                return;
-       memcpy(name_buf, name, name_end - name + 1);
-       name_buf[name_end - name + 1] = '\0';
+       name_buf = xmemdupz(name, name_end - name + 1);
 
        elem = string_list_lookup(people, name_buf);
        if (!elem) {
@@ -254,6 +253,7 @@ static void record_person(int which, struct string_list *people,
                elem->util = (void *)0;
        }
        elem->util = (void*)(util_as_integral(elem) + 1);
+       free(name_buf);
 }
 
 static int cmp_string_list_util_as_integral(const void *a_, const void *b_)