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>>> ~3,~2,~1,~0,~-1,~-2,~3
(-4, -3, -2, -1, 0, 1, -4)
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>>> import binascii
>>> binascii.crc32("ÎÒÃÇ")
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dwCrc32 = dwCrc32 ^ 0xFFFFFFFFL
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dwCrc32 = ~dwCrc32
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#coding=gbk
def mycrc32(szString):
m_pdwCrc32Table = [0 for x in range(0,256)]
dwPolynomial = 0xEDB88320;
dwCrc = 0
for i in range(0,255):
dwCrc = i
for j in [8,7,6,5,4,3,2,1]:
if dwCrc & 1:
dwCrc = (dwCrc >> 1) ^ dwPolynomial
else:
dwCrc >>= 1
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