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#include |
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namespace panda { namespace encode { |
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static const int XX = 255; /* illegal char */ |
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static const char basis16[] = "0123456789abcdef"; |
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static const char basis16up[] = "0123456789ABCDEF"; |
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static const unsigned char index16[256] = { |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX, |
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XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, |
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XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX |
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}; |
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size_t encode_base16 (const string_view source, char* dest, bool upper) { |
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100
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const char* basis = upper ? basis16up : basis16; |
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unsigned const char* str = (unsigned const char*)source.data(); |
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unsigned const char* const end = str + source.length(); |
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char* ptr = dest; |
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100
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for (; str != end; ++str) { |
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512
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unsigned char c = *str; |
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512
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*ptr++ = basis[c / 16]; |
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512
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*ptr++ = basis[c % 16]; |
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} |
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return ptr - dest; |
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} |
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size_t decode_base16 (const string_view source, char* dest) { |
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unsigned const char* str = (unsigned const char*)source.data(); |
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unsigned const char* const end = str + source.length(); |
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char* ptr = dest; |
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100
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while (str + 1 < end) { |
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512
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*ptr++ = index16[*str] * 16 + index16[str[1]]; |
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512
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str += 2; |
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} |
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return ptr - dest; |
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} |
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}} |