Function next_record

refs/packed-backend.c:886–978

* Move the iterator to the next record in the snapshot. Adjust the fields in * `iter` and return `ITER_OK` or `ITER_DONE`. This function does not free the * iterator in the case of `ITER_DONE`. */

 * iterator in the case of `ITER_DONE`.
 */
static int next_record(struct packed_ref_iterator *iter)
{
	const char *p, *eol;

	memset(&iter->base.ref, 0, sizeof(iter->base.ref));
	strbuf_reset(&iter->refname_buf);

	/*
	 * If iter->pos is contained within a skipped region, jump past
	 * it.
	 *
	 * Note that each skipped region is considered at most once,
	 * since they are ordered based on their starting position.
	 */
	while (iter->jump_cur < iter->jump_nr) {
		struct jump_list_entry *curr = &iter->jump[iter->jump_cur];
		if (iter->pos < curr->start)
			break; /* not to the next jump yet */

		iter->jump_cur++;
		if (iter->pos < curr->end) {
			iter->pos = curr->end;
			trace2_counter_add(TRACE2_COUNTER_ID_PACKED_REFS_JUMPS, 1);
			/* jumps are coalesced, so only one jump is necessary */
			break;
		}
	}

	if (iter->pos == iter->eof)
		return ITER_DONE;

	iter->base.ref.flags = REF_ISPACKED;
	p = iter->pos;

	if (iter->eof - p < snapshot_hexsz(iter->snapshot) + 2 ||
	    parse_oid_hex_algop(p, &iter->oid, &p, iter->repo->hash_algo) ||
	    !isspace(*p++))
		die_invalid_line(iter->snapshot->refs->path,
				 iter->pos, iter->eof - iter->pos);
	iter->base.ref.oid = &iter->oid;

	eol = memchr(p, '\n', iter->eof - p);
	if (!eol)
		die_unterminated_line(iter->snapshot->refs->path,
				      iter->pos, iter->eof - iter->pos);

	strbuf_add(&iter->refname_buf, p, eol - p);
	iter->base.ref.name = iter->refname_buf.buf;

	if (refname_contains_nul(&iter->refname_buf))
		die("packed refname contains embedded NULL: %s", iter->base.ref.name);

	if (check_refname_format(iter->base.ref.name, REFNAME_ALLOW_ONELEVEL)) {
		if (!refname_is_safe(iter->base.ref.name))
			die("packed refname is dangerous: %s",
			    iter->base.ref.name);
		oidclr(&iter->oid, iter->repo->hash_algo);
		iter->base.ref.flags |= REF_BAD_NAME | REF_ISBROKEN;