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/*
File: file_bmp.c
Copyright (C) 1998-2006 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "photorec.h"
static const char* header_check_bmp(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, t_file_recovery *file_recovery);
static int data_check_bmp(const unsigned char *buffer, const unsigned int buffer_size, t_file_recovery *file_recovery);
static void file_check_bmp(t_file_recovery *file_recovery);
const t_file_hint file_hint_bmp= {
.extension="bmp",
.description="BMP bitmap image",
.min_header_distance=0,
.min_filesize=65,
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.header_check=&header_check_bmp,
.data_check=&data_check_bmp,
.file_check=&file_check_bmp
};
static uint64_t bmp_file_size=0;
static const char* header_check_bmp(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, t_file_recovery *file_recovery)
{
if(buffer[0]=='B' && buffer[1]=='M' &&
buffer[6]==0x00 && buffer[7]==0x00 && buffer[8]==0x00 && buffer[9]==0x00)
{
bmp_file_size=(uint64_t)buffer[2]+(((uint64_t)buffer[3])<<8)+(((uint64_t)buffer[4])<<16)+(((uint64_t)buffer[5])<<24);
return file_hint_bmp.extension;
}
return NULL;
}
static int data_check_bmp(const unsigned char *buffer, const unsigned int buffer_size, t_file_recovery *file_recovery)
{
if(file_recovery->file_size>=bmp_file_size)
{
file_recovery->file_size=bmp_file_size;
return 2;
}
return 1;
}
static void file_check_bmp(t_file_recovery *file_recovery)
{
if(file_recovery->file_size<bmp_file_size)
file_recovery->file_size=0;
else
file_recovery->file_size=bmp_file_size;
}
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