rarfile.py 文件源码

def _read_comment_v3(self, inf, psw=None):

        # read data
        rf = XFile(inf.volume_file)
        rf.seek(inf.file_offset)
        data = rf.read(inf.compress_size)
        rf.close()

        # decompress
        cmt = rar_decompress(inf.extract_version, inf.compress_type, data,
                             inf.file_size, inf.flags, inf.CRC, psw, inf.salt)

        # check crc
        if self._crc_check:
            crc = crc32(cmt)
            if crc < 0:
                crc += (1 << 32)
            if crc != inf.CRC:
                return None

        return self._decode_comment(cmt)

    # write in-memory archive to temp file - needed for solid archives