testdisk/src/file_wad.c
2021-01-06 18:52:23 +01:00

72 lines
2.2 KiB
C

/*
File: file_wad.c
Copyright (C) 2020 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_wad)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "common.h"
#include "filegen.h"
static void register_header_check_wad(file_stat_t *file_stat);
const file_hint_t file_hint_wad= {
.extension="wad",
.description="Doom",
.max_filesize=PHOTOREC_MAX_SIZE_32,
.recover=1,
.enable_by_default=1,
.register_header_check=&register_header_check_wad
};
struct wad_header
{
uint32_t identification;
uint32_t numlumps;
uint32_t infotableofs;
} __attribute__ ((gcc_struct, __packed__));
static int header_check_wad(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)
{
const struct wad_header *hdr=(const struct wad_header *)buffer;
const unsigned int infotableofs=le32(hdr->infotableofs);
if(le32(hdr->numlumps) == 0)
return 0;
if(infotableofs < sizeof(struct wad_header))
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_wad.extension;
file_recovery_new->min_filesize=infotableofs;
return 1;
}
static void register_header_check_wad(file_stat_t *file_stat)
{
register_header_check(0, "PWAD", 4, &header_check_wad, file_stat);
register_header_check(0, "IWAD", 4, &header_check_wad, file_stat);
}
#endif