utility.h

#ifndef UTILITY_H
#define UTILITY_H
#include <string.h>
#include "data.h"
#include "instr.h"
#include "error_helper.h"
#include "memory_constants.h"
#include "debug.h"
#include "interrupt.h"
#include <stdio.h>
#include <stdlib.h>

// Macro to flush stdin
#define FLUSH_STDIN(x) {if (x[strlen(x)-1] != '\n') {do fgets(Junk,16,stdin); while (Junk[strlen(Junk)-1] != '\n'); } else x[strlen(x) - 1] = '\0';}
char Junk[16];	// buffer for discarding excessive user input, 
				// used by "FLUSH_STDIN" macro

/*
 * Gets the instruction pointed by IP, to the argument
 * Return 0 on success
 * Returns -1 on error after setting IP to exception handler
 */
int getInstruction(char *); 

void emptyPage(int page_no);
struct address translate (int virtual_addr);
int getInteger(char* str );
void storeInteger(char *str, int num);
int getType(char* str);
int isSafeState();
Exception isSafeState2();
char * resolveOperand(int r, int flag1, int flag2, char * string);
Exception isRegisterInaccessible(int);
void raiseException(Exception);
#endif