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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * convert long int to base 64 ascii 35 * char set is [./0-9A-Za-z] 36 * two's complement negatives are assumed, 37 * but no assumptions are made about sign propagation on right shift 38 * 39 */ 40 41 #pragma weak l64a = _l64a 42 43 #include "synonyms.h" 44 #include "mtlib.h" 45 #include "libc.h" 46 #include <values.h> 47 #include <synch.h> 48 #include <thread.h> 49 #include <stdlib.h> 50 #include <sys/types.h> 51 #include "tsd.h" 52 53 #define BITSPERCHAR 6 /* to hold entire character set */ 54 #define BITSUSED (BITSPERBYTE * sizeof (int)) 55 #define NMAX ((BITSUSED + BITSPERCHAR - 1)/BITSPERCHAR) 56 #define SIGN (-(1 << (BITSUSED - BITSPERCHAR - 1))) 57 #define CHARMASK ((1 << BITSPERCHAR) - 1) 58 #define WORDMASK ((1 << ((NMAX - 1) * BITSPERCHAR)) - 1) 59 60 char * 61 l64a(long value) 62 { 63 /* XPG4: only the lower 32 bits are used */ 64 int lg = (int)value; 65 char *buf = tsdalloc(_T_L64A, NMAX + 1, NULL); 66 char *s = buf; 67 68 if (buf == NULL) 69 return (NULL); 70 71 while (lg != 0) { 72 73 int c = (lg & CHARMASK) + ('0' - 2); 74 75 if (c > '9') 76 c += 'A' - '9' - 1; 77 if (c > 'Z') 78 c += 'a' - 'Z' - 1; 79 *s++ = (char)c; 80 /* fill high-order CHAR if negative */ 81 /* but suppress sign propagation */ 82 lg = ((lg < 0) ? (lg >> BITSPERCHAR) | SIGN : 83 lg >> BITSPERCHAR) & WORDMASK; 84 } 85 *s = '\0'; 86 return (buf); 87 } 88