fw_builder/bundle-tools/fwcs.c

/*
    A small tool to calculate Wyse WinTerm firmware image checksums
    Copyright (C) 2005  Wilmer van der Gaast <wilmer@gaast.net>
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the second version of the GNU
    General Public License as published by the Free Software
    Foundation.
    
    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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>

#if BYTE_ORDER == BIG_ENDIAN
#define cvt32(x) ((((x)&0xff)<<24) | (((x)&0xff00)<<8) | (((x)&0xff0000)>>8) | (((x)&0xff000000)>>24))
#else
#define cvt32(x) (x)
#endif

int main( int argc, char *argv[] )
{
	unsigned int checksum = 0xFFFE1000;
	unsigned int tmp;
	int fd;
	
	if( argc < 2 )
	{
		fprintf( stderr, "Invalid number of arguments!\n" );
		return( 1 );
	}
	
	fd = open( argv[1], O_RDONLY );
	if( fd < 0 )
	{
		perror( "open" );
		return( 1 );
	}
	
	while( read( fd, &tmp, 4 ) > 0 )
	{
		checksum -= cvt32( tmp );
		tmp = 0;
	}
	
	printf( "%08x\n", checksum );
	
	return( 0 );
}
1	/*
2	A small tool to calculate Wyse WinTerm firmware image checksums
3	Copyright (C) 2005 Wilmer van der Gaast <wilmer@gaast.net>
4
5	This program is free software; you can redistribute it and/or
6	modify it under the terms of the second version of the GNU
7	General Public License as published by the Free Software
8	Foundation.
9
10	This program is distributed in the hope that it will be useful,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	GNU General Public License for more details.
14
15	You should have received a copy of the GNU General Public License
16	along with this program; if not, write to the Free Software
17	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18	*/
19
20	#include <sys/types.h>
21	#include <sys/stat.h>
22	#include <fcntl.h>
23	#include <unistd.h>
24	#include <stdio.h>
25
26	#if BYTE_ORDER == BIG_ENDIAN
27	#define cvt32(x) ((((x)&0xff)<<24) \| (((x)&0xff00)<<8) \| (((x)&0xff0000)>>8) \| (((x)&0xff000000)>>24))
28	#else
29	#define cvt32(x) (x)
30	#endif
31
32	int main( int argc, char *argv[] )
33	{
34	unsigned int checksum = 0xFFFE1000;
35	unsigned int tmp;
36	int fd;
37
38	if( argc < 2 )
39	{
40	fprintf( stderr, "Invalid number of arguments!\n" );
41	return( 1 );
42	}
43
44	fd = open( argv[1], O_RDONLY );
45	if( fd < 0 )
46	{
47	perror( "open" );
48	return( 1 );
49	}
50
51	while( read( fd, &tmp, 4 ) > 0 )
52	{
53	checksum -= cvt32( tmp );
54	tmp = 0;
55	}
56
57	printf( "%08x\n", checksum );
58
59	return( 0 );
60	}