#ifndef _UTILITY_
#define _UTILITY_

#ifndef FILE
#include <stdio.h>
#endif

#define Max(a, b) ((a)>(b)?(a):(b))
#define Min(a, b) ((a)<(b)?(a):(b))

#define RoundUp(n, unit) ((((n) + (unit) - 1) / (unit)) * (unit))
#define RoundDown(n, unit) (((n) / (unit)) * (unit))

extern FILE * CheckOpen ();
	/* String fileName, String access */

extern void CheckReadLine ();
	/* FILE * file, char line[], int maxLength */

extern void Trace ();
	/* String message */
	
#endif