Function convert_commit_object

object-file-convert.c:150–251

}

static int convert_commit_object(struct repository *repo,
				 struct strbuf *out,
				 const struct git_hash_algo *from,
				 const struct git_hash_algo *to,
				 const char *buffer, size_t size)
{
	const char *tail = buffer;
	const char *bufptr = buffer;
	const int tree_entry_len = from->hexsz + 5;
	const int parent_entry_len = from->hexsz + 7;
	struct object_id oid, mapped_oid;
	const char *p, *eol;

	tail += size;

	while ((bufptr < tail) && (*bufptr != '\n')) {
		eol = memchr(bufptr, '\n', tail - bufptr);
		if (!eol)
			return error(_("bad %s in commit"), "line");

		if (((bufptr + 5) < eol) && !memcmp(bufptr, "tree ", 5))
		{
			if (((bufptr + tree_entry_len) != eol) ||
			    parse_oid_hex_algop(bufptr + 5, &oid, &p, from) ||
			    (p != eol))
				return error(_("bad %s in commit"), "tree");

			if (repo_oid_to_algop(repo, &oid, to, &mapped_oid))
				return error(_("unable to map %s %s in commit object"),
					     "tree", oid_to_hex(&oid));
			strbuf_addf(out, "tree %s\n", oid_to_hex(&mapped_oid));
		}
		else if (((bufptr + 7) < eol) && !memcmp(bufptr, "parent ", 7))
		{
			if (((bufptr + parent_entry_len) != eol) ||
			    parse_oid_hex_algop(bufptr + 7, &oid, &p, from) ||
			    (p != eol))
				return error(_("bad %s in commit"), "parent");

			if (repo_oid_to_algop(repo, &oid, to, &mapped_oid))
				return error(_("unable to map %s %s in commit object"),
					     "parent", oid_to_hex(&oid));

			strbuf_addf(out, "parent %s\n", oid_to_hex(&mapped_oid));
		}
		else if (((bufptr + 9) < eol) && !memcmp(bufptr, "mergetag ", 9))
		{
			struct strbuf tag = STRBUF_INIT, new_tag = STRBUF_INIT;

			/* Recover the tag object from the mergetag */
			strbuf_add(&tag, bufptr + 9, (eol - (bufptr + 9)) + 1);

			bufptr = eol + 1;
			while ((bufptr < tail) && (*bufptr == ' ')) {
				eol = memchr(bufptr, '\n', tail - bufptr);
				if (!eol) {
					strbuf_release(&tag);
					return error(_("bad %s in commit"), "mergetag continuation");