Rotating bits of any integer in C
- by Tim
Pass a integer 2 to this function and then return a integer which is 4
x = 2;
x = rotateInt('L', x, 1);
(left shift the bits by 1)
Example:
00000010 - rotate left by 1 - 00000100
but if I pass this:
x = rotateInt('R', x, 3);
it will return 64, 01000000
Here is the code, can someone correct the error... thanks
int rotateInt(char direction, unsigned int x, int y)
{
unsigned int mask = 0;
int num = 0, result = 0;
int i;
for(i = 0; i < y; i++)
{
if(direction == 'R')
{
if((x & 1) == 1)
x = (x ^ 129);
else
x = x >> 1;
}
else if(direction == 'L')
{
if((x & 128) == 1)
x = (x ^ 129);
else
x = x << 1;
}
}
result = (result ^ x);
return result;
}
