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spot62/byte_utils.cpp

Created April 23, 2019 08:40
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Byte clamp
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byte_utils.cpp
static unsigned char byte_clamp(int c)
{
unsigned char rc = { static_cast<unsigned char>(c), 255, 0 };
unsigned uc = static_cast<unsigned>(c);
// +1 if greater 255
// and +1 if bit of sign 1
return rc[!!(uc & ~0xff) + !!(uc & ~(~0u >> 1))];
}
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