/**
* @brief Fetch an object in its binary representation by name.
*
* Throws an exception if the object cannot be found.
*
* @param $object_name (string) name of the object (binary SHA1)
* @return (array) an array consisting of the object type name (string) and the
* binary representation of the object (string)
*/
public function getRawObject(SHA $sha)
{
static $cache = array();
/* FIXME allow limiting the cache to a certain size */
if (!isset($cache[(string) $sha])) {
$path = sprintf('%s/objects/%s/%s', $this->dir, substr($sha->hex(), 0, 2), substr($sha->hex(), 2));
if (file_exists($path)) {
list($hdr, $object_data) = explode("", gzuncompress(file_get_contents($path)), 2);
sscanf($hdr, "%s %d", $type, $object_size);
$cache[(string) $sha] = array($type, $object_data);
} else {
if ($x = $this->findPackedObject($sha)) {
list($pack_sha, $object_offset) = $x;
$pack = fopen(sprintf('%s/objects/pack/pack-%s.pack', $this->dir, $pack_sha->hex()), 'rb');
flock($pack, LOCK_SH);
/* check magic and version */
$magic = fread($pack, 4);
$version = Binary::fuint32($pack);
if ($magic != 'PACK' || $version != 2) {
throw new Exception('unsupported pack format');
}
$cache[(string) $sha] = $this->unpackObject($pack, $object_offset);
fclose($pack);
} else {
throw new Exception(sprintf('object not found: %s', $sha->hex()));
}
}
}
return $cache[(string) $sha];
}
