-static void show_rev(int type, const unsigned char *sha1)
-{
- if (no_revs)
- return;
- output_revs++;
- printf("%s%s\n", type == show_type ? "" : "^", sha1_to_hex(sha1));
-}
-
-static void show_rev_arg(char *rev)
-{
- if (no_revs)
- return;
- puts(rev);
-}
-
-static void show_norev(char *norev)
-{
- if (revs_only)
- return;
- puts(norev);
-}
-
-static void show_arg(char *arg)
-{
- if (do_rev_argument && is_rev_argument(arg))
- show_rev_arg(arg);
- else
- show_norev(arg);
-}
-
-static int get_parent(char *name, unsigned char *result, int idx)
-{
- unsigned char sha1[20];
- int ret = get_extended_sha1(name, sha1);
- struct commit *commit;
- struct commit_list *p;
-
- if (ret)
- return ret;
- commit = lookup_commit_reference(sha1);
- if (!commit)
- return -1;
- if (parse_commit(commit))
- return -1;
- p = commit->parents;
- while (p) {
- if (!--idx) {
- memcpy(result, p->item->object.sha1, 20);
- return 0;
- }
- p = p->next;
- }
- return -1;
-}
-
-static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
-{
- static char dirname[PATH_MAX];
- char hex[40];
- DIR *dir;
- int found;
-
- snprintf(dirname, sizeof(dirname), "%s/%.2s", get_object_directory(), name);
- dir = opendir(dirname);
- sprintf(hex, "%.2s", name);
- found = 0;
- if (dir) {
- struct dirent *de;
- while ((de = readdir(dir)) != NULL) {
- if (strlen(de->d_name) != 38)
- continue;
- if (memcmp(de->d_name, name + 2, len-2))
- continue;
- memcpy(hex + 2, de->d_name, 38);
- if (++found > 1)
- break;
- }
- closedir(dir);
- }
- if (found == 1)
- return get_sha1_hex(hex, sha1) == 0;
- return 0;
-}
-
-static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b)
-{
- do {
- if (*a != *b)
- return 0;
- a++;
- b++;
- len -= 2;
- } while (len > 1);
- if (len)
- if ((*a ^ *b) & 0xf0)
- return 0;
- return 1;
-}
-
-static int find_short_packed_object(int len, const unsigned char *match, unsigned char *sha1)