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miloyip/IsWhitespace_Arithmetic.cpp

Created February 15, 2016 07:10
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IsWhitespace_Arithmetic
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IsWhitespace_Arithmetic.cpp
inline uint32_t IsWhitespace_Arithmetic(char c) {
uint32_t v = (static_cast<uint32_t>(c) * 0x01010101u) ^ 0x200A0D09u;
return (v - 0x01010101u) & ~v & 0x80808080u; // https://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord
}
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