1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */
23*0Sstevel@tonic-gate /* All Rights Reserved */
24*0Sstevel@tonic-gate
25*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.5 */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /*LINTLIBRARY*/
28*0Sstevel@tonic-gate /*
29*0Sstevel@tonic-gate * convert long int to base 64 ascii
30*0Sstevel@tonic-gate * char set is [./0-9A-Za-z]
31*0Sstevel@tonic-gate * two's complement negatives are assumed,
32*0Sstevel@tonic-gate * but no assumptions are made about sign propagation on right shift
33*0Sstevel@tonic-gate *
34*0Sstevel@tonic-gate */
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #include <values.h>
37*0Sstevel@tonic-gate #define BITSPERCHAR 6 /* to hold entire character set */
38*0Sstevel@tonic-gate #define BITSPERLONG (BITSPERBYTE * sizeof(long))
39*0Sstevel@tonic-gate #define NMAX ((BITSPERLONG + BITSPERCHAR - 1)/BITSPERCHAR)
40*0Sstevel@tonic-gate #define SIGN (-(1L << (BITSPERLONG - BITSPERCHAR - 1)))
41*0Sstevel@tonic-gate #define CHARMASK ((1 << BITSPERCHAR) - 1)
42*0Sstevel@tonic-gate #define WORDMASK ((1L << ((NMAX - 1) * BITSPERCHAR)) - 1)
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate static char buf[NMAX + 1];
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate char *
l64a(lg)47*0Sstevel@tonic-gate l64a(lg)
48*0Sstevel@tonic-gate register long lg;
49*0Sstevel@tonic-gate {
50*0Sstevel@tonic-gate register char *s = buf;
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate while (lg != 0) {
53*0Sstevel@tonic-gate
54*0Sstevel@tonic-gate register int c = ((int)lg & CHARMASK) + ('0' - 2);
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate if (c > '9')
57*0Sstevel@tonic-gate c += 'A' - '9' - 1;
58*0Sstevel@tonic-gate if (c > 'Z')
59*0Sstevel@tonic-gate c += 'a' - 'Z' - 1;
60*0Sstevel@tonic-gate *s++ = c;
61*0Sstevel@tonic-gate /* fill high-order CHAR if negative */
62*0Sstevel@tonic-gate /* but suppress sign propagation */
63*0Sstevel@tonic-gate lg = ((lg < 0) ? (lg >> BITSPERCHAR) | SIGN :
64*0Sstevel@tonic-gate lg >> BITSPERCHAR) & WORDMASK;
65*0Sstevel@tonic-gate }
66*0Sstevel@tonic-gate *s = '\0';
67*0Sstevel@tonic-gate return (buf);
68*0Sstevel@tonic-gate }
69