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 /* 31 * convert base 64 ascii to long int 32 * char set is [./0-9A-Za-z] 33 * 34 */ 35 #include "lint.h" 36 #include <sys/types.h> 37 #include <stdlib.h> 38 39 #define BITSPERCHAR 6 /* to hold entire character set */ 40 #define MAXBITS (6 * BITSPERCHAR) /* maximum number */ 41 /* of 6 chars converted */ 42 43 long 44 a64l(const char *s) 45 { 46 int i, c; 47 int lg = 0; 48 49 for (i = 0; ((c = *s++) != '\0') && (i < MAXBITS); i += BITSPERCHAR) { 50 if (c > 'Z') 51 c -= 'a' - 'Z' - 1; 52 if (c > '9') 53 c -= 'A' - '9' - 1; 54 lg |= (c - ('0' - 2)) << i; 55 } 56 return ((long)lg); 57 } 58