struct object *parse_object(unsigned char *sha1) { unsigned long mapsize; void *map = map_sha1_file(sha1, &mapsize); if (map) { char type[100]; unsigned long size; void *buffer = unpack_sha1_file(map, mapsize, type, &size); if (!buffer) return NULL; if (check_sha1_signature(sha1, buffer, size, type) < 0) printf("sha1 mismatch %s\n", sha1_to_hex(sha1)); munmap(map, mapsize); if (!strcmp(type, "blob")) { struct blob *ret = lookup_blob(sha1); parse_blob(ret); return &ret->object; } else if (!strcmp(type, "tree")) { struct tree *ret = lookup_tree(sha1); parse_tree(ret); return &ret->object; } else if (!strcmp(type, "commit")) { struct commit *ret = lookup_commit(sha1); parse_commit(ret); return &ret->object; } else if (!strcmp(type, "tag")) { struct tag *ret = lookup_tag(sha1); parse_tag(ret); return &ret->object; } else { return NULL; } } return NULL; }
/* * We refuse to tag something we can't verify. Just because. */ static int verify_object(unsigned char *sha1, const char *expected_type) { int ret = -1; enum object_type type; unsigned long size; void *buffer = read_sha1_file(sha1, &type, &size); if (buffer) { if (type == type_from_string(expected_type)) ret = check_sha1_signature(sha1, buffer, size, expected_type); free(buffer); } return ret; }