compat: Add simplified merge sort implementation from glibc

diff --git a/builtin-fmt-merge-msg.c b/builtin-fmt-merge-msg.c
index ae60fccea74077b4d2456919d2f911f8a257c5b4..6163bd4975e3e361e36ffc89ea4c91d0edd02949 100644 (file)
--- a/builtin-fmt-merge-msg.c
+++ b/builtin-fmt-merge-msg.c
@@ -140,12 +140,10 @@ static int handle_line(char *line)
        if (!strcmp(".", src) || !strcmp(src, origin)) {
                int len = strlen(origin);
                if (origin[0] == '\'' && origin[len - 1] == '\'') {
-                       char *new_origin = xmalloc(len - 1);
-                       memcpy(new_origin, origin + 1, len - 2);
-                       new_origin[len - 2] = 0;
-                       origin = new_origin;
-               } else
+                       origin = xmemdupz(origin + 1, len - 2);
+               } else {
                        origin = xstrdup(origin);
+               }
        } else {
                char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
                sprintf(new_origin, "%s of %s", origin, src);
@@ -178,7 +176,7 @@ static void shortlog(const char *name, unsigned char *sha1,
        struct commit *commit;
        struct object *branch;
        struct list subjects = { NULL, NULL, 0, 0 };
-       int flags = UNINTERESTING | TREECHANGE | SEEN | SHOWN | ADDED;
+       int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
 
        branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
        if (!branch || branch->type != OBJ_COMMIT)
@@ -211,14 +209,11 @@ static void shortlog(const char *name, unsigned char *sha1,
 
                bol += 2;
                eol = strchr(bol, '\n');
-
                if (eol) {
-                       int len = eol - bol;
-                       oneline = xmalloc(len + 1);
-                       memcpy(oneline, bol, len);
-                       oneline[len] = 0;
-               } else
+                       oneline = xmemdupz(bol, eol - bol);
+               } else {
                        oneline = xstrdup(bol);
+               }
                append_to_list(&subjects, oneline, NULL);
        }