a64l.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* 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);
}