/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

/*	Copyright (c) 1988 AT&T	*/

/*	  All Rights Reserved  	*/

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*

 * convert base 64 ascii to long int

 * char set is [./0-9A-Za-z]

 *

 */

#include "lint.h"

#include <sys/types.h>

#include <stdlib.h>

#define	BITSPERCHAR	6 /* to hold entire character set */

#define	MAXBITS		(6 * BITSPERCHAR) /* maximum number */

			/* of 6 chars converted */

long

a64l(const char *s)

{

	int i, c;

	int lg = 0;

	for (i = 0; ((c = *s++) != '\0') && (i < MAXBITS); i += BITSPERCHAR) {

		if (c > 'Z')

			c -= 'a' - 'Z' - 1;

		if (c > '9')

			c -= 'A' - '9' - 1;

		lg |= (c - ('0' - 2)) << i;

	}

	return ((long)lg);

}