UWfirmforce
/* $Id: bzip2.c,v 1.1 2009/02/21 21:25:19 khorben Exp $ */
/* Copyright (c) 2007 khorben of Uberwall */
/* This program 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 version 2 of the License.
*
* 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 to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <stdio.h>
#include <string.h>
#include "plugin.h"
/* bzip2 */
/* public */
/* variables */
/* magic */
static unsigned char sig1[] = "BZh1\x31\x41\x59\x26\x53\x59";
static unsigned char sig2[] = "BZh2\x31\x41\x59\x26\x53\x59";
static unsigned char sig3[] = "BZh3\x31\x41\x59\x26\x53\x59";
static unsigned char sig4[] = "BZh4\x31\x41\x59\x26\x53\x59";
static unsigned char sig5[] = "BZh5\x31\x41\x59\x26\x53\x59";
static unsigned char sig6[] = "BZh6\x31\x41\x59\x26\x53\x59";
static unsigned char sig7[] = "BZh7\x31\x41\x59\x26\x53\x59";
static unsigned char sig8[] = "BZh8\x31\x41\x59\x26\x53\x59";
static unsigned char sig9[] = "BZh9\x31\x41\x59\x26\x53\x59";
static unsigned char flbck1[] = "\x31\x41\x59\x26\x53\x59";
static unsigned char flbck2[] = "\x17\x72\x45\x38\x50\x90";
static unsigned char flbck3[] = "BZh";
static PluginMagic bzip2_magic[] =
{
{ 0, 0, sig1, sizeof(sig1)-1 },
{ 0, 0, sig2, sizeof(sig2)-1 },
{ 0, 0, sig3, sizeof(sig3)-1 },
{ 0, 0, sig4, sizeof(sig4)-1 },
{ 0, 0, sig5, sizeof(sig5)-1 },
{ 0, 0, sig6, sizeof(sig6)-1 },
{ 0, 0, sig7, sizeof(sig7)-1 },
{ 0, 0, sig8, sizeof(sig8)-1 },
{ 0, 0, sig9, sizeof(sig9)-1 },
{ 0, 4, flbck1, sizeof(flbck1)-1},
{ 0, 4, flbck2, sizeof(flbck2)-1},
{ 0, 0, flbck3, sizeof(flbck3)-1},
{ 0, 0, NULL, 0, }
};
/* functions */
static int bzip2_callback(PluginHelper * ph, int signature, FILE * fp);
/* plugin */
Plugin plugin =
{
PT_ARCHIVE | PT_COMPRESSION,
"BZIP2",
bzip2_magic,
bzip2_callback
};
/* private */
/* functions */
/* bzip2_callback */
static int bzip2_callback(PluginHelper * ph, int signature, FILE * fp)
{
char buf[4+sizeof(flbck1)];
if(fread(&buf, sizeof(buf), 1, fp) != 1)
return 0;
if(strncmp("BZh", buf, 3) != 0)
return 0;
if(buf[3] < '0' || buf[3] > '9')
return 0;
ph->printf(ph, "compression %c\n", buf[3]);
if(memcmp(&buf[4], flbck1, sizeof(flbck1)-1) == 0
|| memcmp(&buf[4], flbck2, sizeof(flbck2)-1) == 0)
return 100;
return 50;
}