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32 lines
772 B
C++
32 lines
772 B
C++
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#include <boost/crc.hpp>
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#include <boost/config.hpp>
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extern "C"
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{
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short crc13 (unsigned char const * data, int length);
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bool crc13_check (unsigned char const * data, int length);
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}
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#define POLY 0x15D7
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#ifdef BOOST_NO_CXX11_CONSTEXPR
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#define TRUNCATED_POLYNOMIAL POLY
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#else
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namespace
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{
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unsigned long constexpr TRUNCATED_POLYNOMIAL = POLY;
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}
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#endif
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// assumes CRC is last 13 bits of the data and is set to zero
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// caller should assign the returned CRC into the message in big endian byte order
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short crc13 (unsigned char const * data, int length)
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{
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return boost::augmented_crc<13, TRUNCATED_POLYNOMIAL> (data, length);
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}
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bool crc13_check (unsigned char const * data, int length)
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{
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return !boost::augmented_crc<13, TRUNCATED_POLYNOMIAL> (data, length);
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}
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