Sphinx\SphinxClient::unpackI64 PHP Method

    public function unpackI64($v)
    {
        list($hi, $lo) = array_values(unpack('N*N*', $v));
        // x64
        if (PHP_INT_SIZE >= 8) {
            if ($hi < 0) {
                // because php 5.2.2 to 5.2.5 is totally fucked up again
                $hi += 1 << 32;
            }
            if ($lo < 0) {
                $lo += 1 << 32;
            }
            return ($hi << 32) + $lo;
        }
        // x32, int
        if ($hi == 0) {
            if ($lo > 0) {
                return $lo;
            }
            return sprintf('%u', $lo);
        } elseif ($hi == -1) {
            // x32, int
            if ($lo < 0) {
                return $lo;
            }
            return sprintf('%.0f', $lo - 4294967296.0);
        }
        $neg = '';
        $c = 0;
        if ($hi < 0) {
            $hi = ~$hi;
            $lo = ~$lo;
            $c = 1;
            $neg = '-';
        }
        $hi = sprintf('%u', $hi);
        $lo = sprintf('%u', $lo);
        // x32, bcmath
        if (function_exists('bcmul')) {
            return $neg . bcadd(bcadd($lo, bcmul($hi, '4294967296')), $c);
        }
        // x32, no-bcmath
        $hi = (double) $hi;
        $lo = (double) $lo;
        $q = floor($hi / 10000000.0);
        $r = $hi - $q * 10000000.0;
        $m = $lo + $r * 4967296.0;
        $mq = floor($m / 10000000.0);
        $l = $m - $mq * 10000000.0 + $c;
        $h = $q * 4294967296.0 + $r * 429.0 + $mq;
        if ($l == 10000000) {
            $l = 0;
            $h++;
        }
        $h = sprintf('%.0f', $h);
        $l = sprintf('%07.0f', $l);
        if ($h == '0') {
            return $neg . sprintf('%.0f', (double) $l);
        }
        return $neg . $h . $l;
    }

 /**
  * @dataProvider provideBigintSigned
  */
 public function testPackBigintSigned($bigint)
 {
     $sphinx = new SphinxClient();
     // packing and unpacking may not preserve data type
     $this->assertEquals($sphinx->unpackI64($sphinx->packI64($bigint)), $bigint);
 }