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/*
File: file_wld.c
Copyright (C) 2016 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_wld)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_wld(file_stat_t *file_stat);
const file_hint_t file_hint_wld = {
.extension = "wld",
.description = "Terraria world",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = ®ister_header_check_wld
};
/* See http://ludwig.schafer.free.fr for WLD file format */
/*@
@ requires file_recovery->file_rename==&file_rename_wld;
@ requires valid_file_rename_param(file_recovery);
@ ensures valid_file_rename_result(file_recovery);
@*/
static void file_rename_wld(file_recovery_t *file_recovery)
{
uint32_t offset;
unsigned char buffer[256];
FILE *file;
if((file = fopen(file_recovery->filename, "rb")) == NULL)
return;
if(fseek(file, 0x1a, SEEK_SET) == -1 || fread(&offset, 4, 1, file) != 1 || fseek(file, le32(offset), SEEK_SET) == -1 || fread(&buffer, 256, 1, file) != 1)
{
fclose(file);
return;
}
fclose(file);
file_rename(file_recovery, &buffer[1], buffer[0], 0, NULL, 1);
}
/*@
@ requires buffer_size >= 0xc;
@ requires separation: \separated(&file_hint_wld, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_wld(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
if(buffer[0xB] <= 0 || buffer[0xB] > 3)
return 0;
reset_file_recovery(file_recovery_new);
switch(buffer[0xb])
{
case 0x01:
file_recovery_new->extension = "map";
break;
case 0x02:
file_recovery_new->extension = file_hint_wld.extension;
file_recovery_new->file_rename = &file_rename_wld;
break;
case 0x03:
file_recovery_new->extension = "plr";
break;
}
return 1;
}
static void register_header_check_wld(file_stat_t *file_stat)
{
static const unsigned char wld_header[10] = {
0x00, 0x00, 0x00,
'r', 'e', 'l', 'o', 'g', 'i', 'c'
};
register_header_check(1, wld_header, sizeof(wld_header), &header_check_wld, file_stat);
}
#endif
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