Function encode_in_pack_object_header

pack-write.c:507–528

* The per-object header is a pretty dense thing, which is * - first byte: low four bits are "size", then three bits of "type", * and the high bit is "size continues". * - each byte afterwards: low seven bits are size continuation, * with the high bit being "size continues" */

 *    with the high bit being "size continues"
 */
int encode_in_pack_object_header(unsigned char *hdr, int hdr_len,
				 enum object_type type, uintmax_t size)
{
	int n = 1;
	unsigned char c;

	if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
		die("bad type %d", type);

	c = (type << 4) | (size & 15);
	size >>= 4;
	while (size) {
		if (n == hdr_len)
			die("object size is too enormous to format");
		*hdr++ = c | 0x80;
		c = size & 0x7f;
		size >>= 7;
		n++;
	}
	*hdr = c;
	return n;
}

struct hashfile *create_tmp_packfile(struct repository *repo,
				     char **pack_tmp_name)