reader_binary.py 文件源码

def _int_factory(sign, data):
    def parse_int():
        value = 0
        length = len(data)
        while length >= 8:
            segment = _rslice(data, length, 8)
            value <<= 64
            value |= unpack('>Q', segment)[0]
            length -= 8
        if length >= 4:
            segment = _rslice(data, length, 4)
            value <<= 32
            value |= unpack('>I', segment)[0]
            length -= 4
        if length >= 2:
            segment = _rslice(data, length, 2)
            value <<= 16
            value |= unpack('>H', segment)[0]
            length -= 2
        if length == 1:
            value <<= 8
            value |= six.indexbytes(data, -length)
        return sign * value
    return parse_int