77 lines
2 KiB
C
77 lines
2 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Christian Hack
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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static FILE * openinfile( const char * filename )
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{
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FILE * F = fopen( filename, "rb" );
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if( F == NULL )
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{
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fprintf( stderr, "Couldn't open input file %s\n", filename );
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perror( "Error was " );
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exit( -1 );
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};
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return F;
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};
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static FILE * openoutfile( const char * filename )
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{
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FILE * F = fopen( filename, "wb" );
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if( F == NULL )
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{
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fprintf( stderr, "Couldn't open output file %s\n", filename );
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perror( "Error was " );
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exit( -1 );
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};
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return F;
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};
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int gigabeat_code(char *infile, char *outfile)
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{
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FILE *in, *out;
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unsigned long size = 0;
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unsigned long bytes_read;
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unsigned long data;
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unsigned long key = 0x19751217;
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in = openinfile(infile);
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out = openoutfile(outfile);
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while (!feof(in)) {
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bytes_read = fread(&data, 1, 4, in);
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data = data ^ key;
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key = key + (key << 1);
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key = key + 0x19751217;
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size += bytes_read;
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fwrite(&data, 1, bytes_read, out);
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}
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fprintf(stderr, "File processed successfully\n" );
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fclose(in);
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fclose(out);
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return(0);
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}
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