fwunpack.py 文件源码

def gzipcrc32(filename):
    datafile = open(filename, 'rb')
    datafile.seek(0)
    databuffer = datafile.read(10000000)
    crc32 = binascii.crc32('')
    while databuffer != '':
        crc32 = binascii.crc32(databuffer, crc32)
        databuffer = datafile.read(10000000)
    datafile.close()
    crc32 = crc32 & 0xffffffff
    return crc32