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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1988 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 /*
     33  * convert base 64 ascii to long int
     34  * char set is [./0-9A-Za-z]
     35  *
     36  */
     37 #include "lint.h"
     38 #include <sys/types.h>
     39 #include <stdlib.h>
     40 
     41 #define	BITSPERCHAR	6 /* to hold entire character set */
     42 #define	MAXBITS		(6 * BITSPERCHAR) /* maximum number */
     43 			/* of 6 chars converted */
     44 
     45 long
     46 a64l(const char *s)
     47 {
     48 	int i, c;
     49 	int lg = 0;
     50 
     51 	for (i = 0; ((c = *s++) != '\0') && (i < MAXBITS); i += BITSPERCHAR) {
     52 		if (c > 'Z')
     53 			c -= 'a' - 'Z' - 1;
     54 		if (c > '9')
     55 			c -= 'A' - '9' - 1;
     56 		lg |= (c - ('0' - 2)) << i;
     57 	}
     58 	return ((long)lg);
     59 }
     60