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Refactor the Golay 24,12,8 code and its uses.

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This commit is contained in:
Jonathan Naylor 2021-04-07 19:56:28 +01:00
parent 8dc54ed21f
commit ffb4bdb042
6 changed files with 43 additions and 32 deletions
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20
Golay24128.cpp
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@ -1090,23 +1090,25 @@ unsigned int CGolay24128::decode23127(unsigned int code)
return code >> 11;
}
unsigned int CGolay24128::decode24128(unsigned int input, bool& valid)
bool CGolay24128::decode24128(unsigned int in, unsigned int& out)
{
unsigned int syndrome = ::get_syndrome_23127(input >> 1);
unsigned int syndrome = ::get_syndrome_23127(in >> 1);
unsigned int error_pattern = DECODING_TABLE_23127[syndrome] << 1;
unsigned int output = input ^ error_pattern;
out = in ^ error_pattern;
valid = (CUtils::countBits(syndrome) < 3U) || !(CUtils::countBits(output) & 1);
bool valid = (CUtils::countBits(syndrome) < 3U) || !(CUtils::countBits(out) & 1);
return output >> 12;
out >>= 12;
return valid;
}
unsigned int CGolay24128::decode24128(unsigned char* bytes, bool& valid)
bool CGolay24128::decode24128(unsigned char* in, unsigned int& out)
{
assert(bytes != NULL);
assert(in != NULL);
unsigned int code = (bytes[0U] << 16) | (bytes[1U] << 8) | (bytes[2U] << 0);
unsigned int code = (in[0U] << 16) | (in[1U] << 8) | (in[2U] << 0);
return decode24128(code, valid);
return decode24128(code, out);
}