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Add bitwise rotate function

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Danny Robson 2012-01-04 17:06:57 +11:00
parent 857dd8a111
commit e01fcdcd59
1 changed files with 9 additions and 0 deletions
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9
bitwise.hpp
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@ -22,6 +22,8 @@
#include <cstdint>
#include "debug.hpp"
const uint8_t BITMASK_1BITS = 0x01;
const uint8_t BITMASK_2BITS = 0x03;
const uint8_t BITMASK_3BITS = 0x07;
@ -32,6 +34,13 @@ const uint8_t BITMASK_7BITS = 0x7F;
const uint8_t BITMASK_8BITS = 0xFF;
template <typename T>
T rotate (const T &value, int magnitude) {
check_hard (magnitude < sizeof (value) * 8 &&
magnitude > -sizeof (value) * 8);
return (value << magnitude) | (value >> sizeof (value) * 8 - magnitude);
}
#endif