/** * @param Buffer $buffer * @return int */ private function parseBuffer(Buffer $buffer) { $size = $buffer->getSize(); if ($size === 0) { return '0'; } $chars = array_map(function ($binary) { return ord($binary); }, str_split($buffer->flip()->getBinary(), 1)); $result = 0; for ($i = 0; $i < $size; $i++) { $mul = $this->math->mul($i, 8); $byte = $this->math->leftShift($chars[$i], $mul); $result = $this->math->bitwiseOr($result, $byte); } if ($chars[0] & 0x80) { $mask = gmp_strval(gmp_com($this->math->leftShift(0x80, 8 * ($size - 1))), 10); return $this->math->sub(0, $this->math->bitwiseAnd($result, $mask)); } return $result; }