#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "fonctions.h"

int codage(int argc, char *argv[]) {
	FILE *f_m, *f_k, *f_mc; /* strcutures permettant, une fois FOPEN 
	exécuté de recupérer des informations pour manipuler les fichiers
	en C */
	int c;
	int k1;
	int calcul;
	int count;
	char cle[100];
	char * cheminFic_m = "message.txt";
	char * cheminFic_k = "cle.txt";
	char * cheminFic_mc = "message_c.txt";
	
//1
	f_m = fopen(cheminFic_m, "r");
	for (c = getc(f_m); c != EOF; c = getc(f_m))
	{
        count = count + 1;
	}
	generate(count);
    fclose(f_m);

//2
	f_k = fopen(cheminFic_k, "wb");
    if (f_k) 
    {
    	fwrite(cle, sizeof(char), count, f_k);
    } 
    else 
    {
        return EXIT_FAILURE;
	}
	f_k = fopen(cheminFic_k, "r");
	/* Traitement erreur */
	fclose(f_k);

//3
	f_mc = fopen(cheminFic_mc, "w");
	/* Traitement erreur */
	fclose(f_mc);
	
	f_m = fopen(cheminFic_m, "r");
	f_k = fopen(cheminFic_k, "r");
	f_mc = fopen(cheminFic_mc, "wb");
	while ((c = fgetc(f_m)) != EOF)
	{
		k1 = fgetc(f_k);
		calcul = (c+k1) % 256;
		fputc(calcul, f_mc);
	}
	fclose(f_m);
	fclose(f_k);
	fclose(f_mc);
	
	return EXIT_SUCCESS;
	
}