rotate a value to the left (or right) arguments: x - value to rotate count - number of times to rotate. negative counter means rotate to the right nbits - number of bits to rotate offset - offset of the first bit to rotate returns: the value with the specified field rotated all other bits are not modified Thread-safe function.long rotate_left(long value, long count, long nbits, long offset);
#define rotate_dword(x, count) rotate_left(x, count, 32, 0) #define rotate_word(x, count) rotate_left(x, count, 16, 0) #define rotate_byte(x, count) rotate_left(x, count, 8, 0)