/*====================================================/
/ Name:    bitFunctions.cc                            /
/ Author:  Joy Schoenberger                           /
/ Date:    April 2002                                 /
/ Purpose: Implementation of bitwise functions for    /
/          CS710 Masters research project: Genetic    /
/          Algorithms for Musical Composition with    /
/          Coherency Through Genotype                 /
/====================================================*/

#include "bitFunctions.h"

unsigned int setBit(unsigned int value, int index){
  unsigned int Mask = (unsigned int)pow(2.0,(double)index);
  return (value | Mask);
}

unsigned int setAll(){
  return INT_MAX;
}

bool isSet(unsigned int value, int index){
  unsigned int Mask, test;
  Mask = (unsigned int)pow(2.0,(double)index);
  test = value | Mask;
  return (test == value );
}
  
unsigned int unset(unsigned int value, int index){
  unsigned int Mask = (unsigned int)pow(2.0,(double)index);
  if(isSet(value,index)) 
    return (value ^ Mask);
  else return value;
}

unsigned int clearAll(){
  return 0;
}

int numSet(unsigned int value){
  // returns number of set bits
  int sum = 0;
  for(int i = 0;(unsigned int)i<sizeof(value)*8;i++)
    if(isSet(value,i)) sum++;
  return sum;
}