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/*
File: file_gp5.c
Copyright (C) 2009 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_gp5)
#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_gp5(file_stat_t *file_stat);
const file_hint_t file_hint_gp5= {
.extension="gp5",
.description="Guitar Pro 4 & 5",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_gp5
};
/*@
@ requires file_recovery->file_check == &file_check_gp5;
@ requires valid_file_check_param(file_recovery);
@ ensures valid_file_check_result(file_recovery);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_gp5(file_recovery_t *file_recovery)
{
const unsigned char gp5_footer[13]= {
0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x40,
0x00, 0x00, 0x00, 0x00, 0x00
};
file_search_footer(file_recovery, gp5_footer, sizeof(gp5_footer), 0);
}
/*@
@ requires buffer_size >= 23;
@ requires separation: \separated(&file_hint_gp5, 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_gp5(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[22]!='.')
return 0;
if(buffer[21]=='4')
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension="gp4";
return 1;
}
if(buffer[21]!='5')
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_gp5.extension;
file_recovery_new->file_check=&file_check_gp5;
return 1;
}
static void register_header_check_gp5(file_stat_t *file_stat)
{
static const unsigned char gp5_header[21]= {
0x18, 'F' , 'I' , 'C' , 'H' , 'I' , 'E' , 'R' ,
' ' , 'G' , 'U' , 'I' , 'T' , 'A' , 'R' , ' ' ,
'P' , 'R' , 'O' , ' ' , 'v'
};
register_header_check(0, gp5_header, sizeof(gp5_header), &header_check_gp5, file_stat);
}
#endif
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