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crcmod
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examples.py
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test_crcmod.py
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Editing: examples.py
#----------------------------------------------------------------------------- # Demonstrate the use of the code generator from crcmod import Crc g8 = 0x185 g16 = 0x11021 g24 = 0x15D6DCB g32 = 0x104C11DB7 def polyFromBits(bits): p = 0 for n in bits: p = p | (1 << n) return p # The following is from Standard ECMA-182 "Data Interchange on 12,7 mm 48-Track # Magnetic Tape Cartridges -DLT1 Format-", December 1992. g64 = polyFromBits([64, 62, 57, 55, 54, 53, 52, 47, 46, 45, 40, 39, 38, 37, 35, 33, 32, 31, 29, 27, 24, 23, 22, 21, 19, 17, 13, 12, 10, 9, 7, 4, 1, 0]) print('Generating examples.c') out = open('examples.c', 'w') out.write('''// Define the required data types typedef unsigned char UINT8; typedef unsigned short UINT16; typedef unsigned int UINT32; typedef unsigned long long UINT64; ''') Crc(g8, rev=False).generateCode('crc8',out) Crc(g8, rev=True).generateCode('crc8r',out) Crc(g16, rev=False).generateCode('crc16',out) Crc(g16, rev=True).generateCode('crc16r',out) Crc(g24, rev=False).generateCode('crc24',out) Crc(g24, rev=True).generateCode('crc24r',out) Crc(g32, rev=False).generateCode('crc32',out) Crc(g32, rev=True).generateCode('crc32r',out) Crc(g64, rev=False).generateCode('crc64',out) Crc(g64, rev=True).generateCode('crc64r',out) # Check out the XOR-out feature. Crc(g16, initCrc=0, rev=True, xorOut=~0).generateCode('crc16x',out) Crc(g24, initCrc=0, rev=True, xorOut=~0).generateCode('crc24x',out) Crc(g32, initCrc=0, rev=True, xorOut=~0).generateCode('crc32x',out) Crc(g64, initCrc=0, rev=True, xorOut=~0).generateCode('crc64x',out) out.close() print('Done')
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