389-ds-base/ldap/servers/slapd/tools/eggencode.c

/** BEGIN COPYRIGHT BLOCK
 * 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.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif


/*
 * Easter egg encoder.  See ../fedse.c:egg_decode() for the mirror image.
 */
#include <stdio.h>

static unsigned char egg_nibble2char( int nibble );

int
main( int argc, char *argv[] )
{
	int		c, colcount;
	char	outc;

	if ( argc > 1 ) {
		fprintf( stderr, "usage: %s < in > out\n", argv[0] );
		return 2;
	}

	colcount = 0;
	while (( c = getchar()) != EOF ) {
		if ( 0 == colcount ) {
			putchar( '"' );
		}
		c ^= 122;
		outc = egg_nibble2char( (c & 0xF0) >> 4 );
		putchar( outc );
		++colcount;
		outc = egg_nibble2char( c & 0x0F );
		putchar( outc );
		++colcount;
		if ( colcount > 72 ) {
			colcount = 0;
			putchar( '"' );
			putchar( '\n' );
		}
	}

	if ( colcount > 0 ) {
		putchar( '"' );
		putchar( '\n' );
	}

	return 0;
}


static unsigned char
egg_nibble2char( int nibble )
{
	return ( nibble < 10 ) ? nibble + '0' : ( nibble - 10 ) + 'A';
}