/*
* 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 long int to base 64 ascii
* char set is [./0-9A-Za-z]
* two's complement negatives are assumed,
* but no assumptions are made about sign propagation on right shift
*
*/
#include "lint.h"
#include "mtlib.h"
#include "libc.h"
#include <values.h>
#include <synch.h>
#include <thread.h>
#include <stdlib.h>
#include <sys/types.h>
#include "tsd.h"
#define BITSPERCHAR 6 /* to hold entire character set */
#define BITSUSED (BITSPERBYTE * sizeof (int))
#define NMAX ((BITSUSED + BITSPERCHAR - 1)/BITSPERCHAR)
#define SIGN (-(1 << (BITSUSED - BITSPERCHAR - 1)))
#define CHARMASK ((1 << BITSPERCHAR) - 1)
#define WORDMASK ((1 << ((NMAX - 1) * BITSPERCHAR)) - 1)
char *
l64a(long value)
{
/* XPG4: only the lower 32 bits are used */
int lg = (int)value;
char *buf = tsdalloc(_T_L64A, NMAX + 1, NULL);
char *s = buf;
if (buf == NULL)
return (NULL);
while (lg != 0) {
int c = (lg & CHARMASK) + ('0' - 2);
if (c > '9')
c += 'A' - '9' - 1;
if (c > 'Z')
c += 'a' - 'Z' - 1;
*s++ = (char)c;
/* fill high-order CHAR if negative */
/* but suppress sign propagation */
lg = ((lg < 0) ? (lg >> BITSPERCHAR) | SIGN :
lg >> BITSPERCHAR) & WORDMASK;
}
*s = '\0';
return (buf);
}