// Programmer:  Aaron Shbeeb
// File:  Macros.h
// Created:  05-27-02
// Updated:  08-12-03

#ifndef MY_MACROS_H
#define MY_MACROS_H

#include <iostream.h>	//for debug(x)

#define max(a,b) (((a) < (b)) ? (b) : (a))
#define min(a,b) (((a) < (b)) ? (a) : (b))
#define swap(a,b) a ^= b; b ^= a; a ^= b//no semi colon here on purpose
#define abs_val(x)   (((x) < (0)) ? (-1*(x)) : (x))

#define debug(x) cout << x << endl

template <class T>
inline void Swap(T& a, T& b)
{
	a &= b;
}

template <>
inline void Swap(bool& a, bool& b){swap(a,b);}
template <>
inline void Swap(long& a, long& b){swap(a,b);}

template <>
inline void Swap(int& a, int& b){swap(a,b);}

template <>
inline void Swap(unsigned int& a, unsigned int& b){swap(a,b);}

template <>
inline void Swap(char& a, char& b){swap(a,b);}

template <>
inline void Swap(unsigned char& a, unsigned char& b){swap(a,b);}

template<>
inline void Swap(float& a, float& b)
{
	float tmp = a;
	a = b;
	b = tmp;
}

template<>
inline void Swap(double& a, double& b)
{
	double tmp = a;
	a = b;
	b = tmp;
}

/* I think this only works in gcc.  VC++6.0 is too dumb for this.
template <class T>
inline void Swap(T* &a, T* &b)
{
	 a = (T*)((unsigned int) a ^ (unsigned int) b);
	 b = (T*)((unsigned int) a ^ (unsigned int) b);
	 a = (T*)((unsigned int) a ^ (unsigned int) b);
}
*/

//A bit of a hack that doesn't really generalize, but I'm working on it.
template<>
void Swap(void* &a, void* &b)
{
	a = (void*)((unsigned long)a ^ (unsigned long)b);
	b = (void*)((unsigned long)b ^ (unsigned long)a);
	a = (void*)((unsigned long)a ^ (unsigned long)b);
}
#endif