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<?php
namespace Tarantool\Client\Packer;
use Tarantool\Client\Exception\Exception;
abstract class PackUtils
{
private static $offsets = [
// MP_UINT
0xcd => 2,
0xce => 4,
0xcf => 8,
// MP_INT
0xd1 => 2,
0xd2 => 4,
0xd3 => 8,
];
public static function packLength($length)
return pack('CN', 0xce, $length);
}
public static function unpackLength($data)
if (false === $data = @unpack('C_/Nlength', $data)) {
throw new Exception('Unable to unpack length value.');
return $data['length'];
public static function getHeaderSize($buffer)
$offset = 0;
$len = strlen($buffer);
while ($offset < $len) {
$c = ord($buffer[$offset]);
if (self::isMap($c) && $offset) {
break;
$offset += isset(self::$offsets[$c]) ? self::$offsets[$c] + 1 : 1;
return $offset;
private static function isMap($c)
return 0x80 === ($c & 0xf0) || 0xde === $c || 0xdf === $c;
tarantool-php /
client
