# include <stdio.h>

//
//  Program 12.4, Stephen Kochan, Programming in C.
//
int main ( void );
unsigned int rotate ( unsigned int value, int n );

int main ( void )
{
  unsigned int w1 = 0xabcdef00u;
  unsigned int w2 = 0xffff1122u;

  printf ( "%x\n", rotate ( w1,   8 ) );
  printf ( "%x\n", rotate ( w1, -16 ) );
  printf ( "%x\n", rotate ( w2,   4 ) );
  printf ( "%x\n", rotate ( w2,  -2 ) );
  printf ( "%x\n", rotate ( w1,   0 ) );
  printf ( "%x\n", rotate ( w1,  44 ) );

  return 0;
}


unsigned int rotate ( unsigned int value, int n )
{
  unsigned int result;
  unsigned int bits;

  if ( 0 < n )
  {
    n = n % 32;
  }
  else
  {
    n = - ( ( - n ) % 32 );
  }

  if ( n == 0 )
  {
    result = value;
  }
  else if ( 0 < n )
  {
    bits = ( value >> ( 32 - n ) );
    result = ( value << n ) | bits;
  }
  else
  {
    n = - n;
    bits = ( value << ( 32 - n ) );
    result = ( value >> n ) | bits;
  }
  return result;
}