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#include <stdio.h>
#include <stdlib.h>
#include "lzss.h"
#include "fileutils.h"

void process_one_file(int  f, int  d, int n) {
    char nom_du_fichier[100];
    char zeros[4] = {0, 0, 0, 0}, * datas;
    long script_position, true_length, delta, data_length;
    int  f_part;
    
    fprintf(stderr, "  Copying header\n");
    
    lseek(f, 0x14c, SEEK_SET);
    read(f, &script_position, 4);
    lseek(f, 0, SEEK_SET);
    copy(f, d, script_position);
    
    lseek(f, 0x150, SEEK_SET);
    read(f, &script_position, 4);
    lseek(f, script_position, SEEK_SET);
    
    data_length = filesize(f) - script_position;
    
    datas = (char *) malloc(data_length);
    read(f, datas, data_length);
    
    fprintf(stderr, "  Processing script\n");
    sprintf(nom_du_fichier, "xeno_d1/ROOMS/%04i/script.comp", n);

    f_part = open(nom_du_fichier, O_RDONLY);
    true_length = filesize(f_part);

    script_position = lseek(d, 0, SEEK_CUR);
    lseek(d, 0x14c, SEEK_SET);
    write(d, &script_position, 4);
    lseek(d, 0x128, SEEK_SET);
    write(d, &true_length, 4);
    lseek(d, 0, SEEK_END);
	
    lzss_comp(f_part, d, &delta);
	
    close(f_part);
	
    script_position = lseek(d, 0, SEEK_CUR);
    if ((true_length = (script_position & 3))) {
        write(d, zeros, 4 - true_length);
    }
    
    fprintf(stderr, "  Processing extra datas\n");
    script_position = lseek(d, 0, SEEK_CUR);
    lseek(d, 0x150, SEEK_SET);
    write(d, &script_position, 4);
    lseek(d, 0, SEEK_END);
    
    write(d, datas, data_length);
    
    free(datas);
}

int main(int argc, char ** argv)
{
    int f_script_comp, f_new_script;
    int i;
    int num = 0;
    char nom_du_fichier[100];

    for (i = 384; i < 1844; i = i + 2) {
	fprintf(stderr, "CD1 - File %d -> Script %d\n", i, num);
	sprintf(nom_du_fichier, "xeno_d1/ROOMS/%04d.out", i);
	f_script_comp = open(nom_du_fichier, O_RDONLY);
	sprintf(nom_du_fichier, "xeno_d1/ROOMS/%04d.out-new", i);
	f_new_script = open(nom_du_fichier, O_WRONLY | O_CREAT | O_TRUNC, 00644);
	
	process_one_file(f_script_comp, f_new_script, num);

	close(f_script_comp);
	num++;
    }
    num = 0;
    

    for (i = 379; i < 1838; i = i + 2) {
	fprintf(stderr, "CD2 - File %d -> Script %d\n", i, num);
	sprintf(nom_du_fichier, "xeno_d2/ROOMS/%04d.out", i);
	f_script_comp = open(nom_du_fichier, O_RDONLY);
	sprintf(nom_du_fichier, "xeno_d2/ROOMS/%04d.out-new", i);
	f_new_script = open(nom_du_fichier, O_WRONLY | O_CREAT | O_TRUNC, 00644);
	
	process_one_file(f_script_comp, f_new_script, num);

	close(f_script_comp);
	num++;
    }
    fprintf(stderr, "Done !\n");
}