/* common.c
 *
 * Created by Rory Healy (healyr@student.unimelb.edu.au)
 * Created on 25th August 2021
 * Last modified 9th September 2021
 *
 * Contains functions for general use throughout other files.
 *
 */

#ifndef COMMON_HEADER
#include "common.h"
#endif 

void checkNullPointer(void *ptr) {
	if (!ptr) {
		fputs("Error: Cannot allocate memory.\n", stderr);
		exit(EXIT_FAILURE);
	}
}

FILE *safeFileOpen(FILE **f, char *fileName, char *mode) {
    *f = fopen(fileName, mode);
    if (*f == NULL) {
        fprintf(stderr, "Error: Unable to open file %s\n", fileName);
        exit(EXIT_FAILURE);
    }
    return *f;
}