#ifndef STDIO_HEADER
#define STDIO_HEADER

#include <stdio.h>

#endif

#ifndef STDLIB_HEADER
#define STDLIB_HEADER

#include <stdlib.h>

#endif

#ifndef STRING_HEADER

#define STRING_HEADER
#include <string.h>

#endif

#ifndef INPUT_HEADER
#define INPUT_HEADER

enum stages {
    STAGE_1 = 1,
    STAGE_2 = 2,
    STAGE_3 = 3,
    STAGE_4 = 4,
    STAGE_ERROR = -1
};

/* Gets the current stage from the command-line argument */
enum stages getStage(char *stage);

/* Checks the validity of the command line input arguments */
void checkInputArgs(int argc, char **argv);

/* Gets the expected number of arguments for a given stage */
int getExpectedArgs(enum stages stage);

/* Prints the corresponding usage strings for a given stage */
void printArgError(enum stages stage, char *errorMessage);

/* Opens a file and checks if the file is safe to use */
FILE *safeFileOpen(FILE **f, char *fileName, char *mode);

#endif