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/*
File: file_it.c
Copyright (C) 2011 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_it)
#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"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_it(file_stat_t *file_stat);
const file_hint_t file_hint_it= {
.extension="it",
.description="Impulse Tracker",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_it
};
/* https://github.com/schismtracker/schismtracker/wiki/ITTECH.TXT */
struct impulse_header
{
uint32_t magic;
char song_name[26];
uint16_t PHiligt;
uint16_t OrdNum;
uint16_t InsNum;
uint16_t SmpNum;
uint16_t PatNum;
uint16_t Cwtv;
uint16_t Cmwt;
uint16_t Flags;
uint16_t Special;
uint8_t GV;
uint8_t MV;
uint8_t IS;
uint8_t IT;
uint8_t Sep;
uint8_t PWD;
uint16_t MsgLgth;
uint16_t MsgOff;
uint32_t Reserved;
char Chnl_Pan[64];
char Chnl_Vol[64];
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct impulse_header);
@ requires separation: \separated(&file_hint_it, 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_it(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 impulse_header *header=(const struct impulse_header *)buffer;
if(header->Reserved!=0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_it.extension;
return 1;
}
static void register_header_check_it(file_stat_t *file_stat)
{
register_header_check(0, "IMPM", 4, &header_check_it, file_stat);
}
#endif
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