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/*
* 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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "base_conversion.h"
#include <string.h>
#include <sys/types.h>
#include "libc.h"
/*
* Copies the appropriate string for a datum of class cl into *buf,
* choosing "Inf" or "Infinity" according to ndigits, the desired
* output string length.
*/
void
__infnanstring(enum fp_class_type cl, int ndigits, char *buf)
{
if (cl == fp_infinity) {
if (ndigits < 8)
(void) memcpy(buf, "Inf", 4);
else
(void) memcpy(buf, "Infinity", 9);
__inf_written = 1;
} else {
(void) memcpy(buf, "NaN", 4);
__nan_written = 1;
}
}
char *
econvert(double arg, int ndigits, int *decpt, int *sign, char *buf)
{
decimal_mode dm;
decimal_record dr;
fp_exception_field_type ef;
int i;
#if defined(__sparc)
dm.rd = _QgetRD();
#elif defined(__i386) || defined(__amd64)
dm.rd = __xgetRD();
#else
#error Unknown architecture
#endif
dm.df = floating_form; /* E format. */
if (ndigits <= 0)
ndigits = 1;
else if (ndigits >= DECIMAL_STRING_LENGTH)
ndigits = DECIMAL_STRING_LENGTH - 1;
dm.ndigits = ndigits; /* Number of significant digits. */
double_to_decimal(&arg, &dm, &dr, &ef);
*sign = dr.sign;
switch (dr.fpclass) {
case fp_normal:
case fp_subnormal:
*decpt = dr.exponent + ndigits;
for (i = 0; i < ndigits; i++)
buf[i] = dr.ds[i];
buf[ndigits] = 0;
break;
case fp_zero:
*decpt = 1;
for (i = 0; i < ndigits; i++)
buf[i] = '0';
buf[ndigits] = 0;
break;
default:
*decpt = 0;
__infnanstring(dr.fpclass, ndigits, buf);
break;
}
return (buf);
}
char *
seconvert(single *arg, int ndigits, int *decpt, int *sign, char *buf)
{
decimal_mode dm;
decimal_record dr;
fp_exception_field_type ef;
int i;
#if defined(__sparc)
dm.rd = _QgetRD();
#elif defined(__i386) || defined(__amd64)
dm.rd = __xgetRD();
#else
#error Unknown architecture
#endif
dm.df = floating_form; /* E format. */
if (ndigits <= 0)
ndigits = 1;
else if (ndigits >= DECIMAL_STRING_LENGTH)
ndigits = DECIMAL_STRING_LENGTH - 1;
dm.ndigits = ndigits; /* Number of significant digits. */
single_to_decimal(arg, &dm, &dr, &ef);
*sign = dr.sign;
switch (dr.fpclass) {
case fp_normal:
case fp_subnormal:
*decpt = dr.exponent + ndigits;
for (i = 0; i < ndigits; i++)
buf[i] = dr.ds[i];
buf[ndigits] = 0;
break;
case fp_zero:
*decpt = 1;
for (i = 0; i < ndigits; i++)
buf[i] = '0';
buf[ndigits] = 0;
break;
default:
*decpt = 0;
__infnanstring(dr.fpclass, ndigits, buf);
break;
}
return (buf);
}
char *
qeconvert(quadruple *arg, int ndigits, int *decpt, int *sign, char *buf)
{
decimal_mode dm;
decimal_record dr;
fp_exception_field_type ef;
int i;
#if defined(__sparc)
dm.rd = _QgetRD();
#elif defined(__i386) || defined(__amd64)
dm.rd = __xgetRD();
#else
#error Unknown architecture
#endif
dm.df = floating_form; /* E format. */
if (ndigits <= 0)
ndigits = 1;
else if (ndigits >= DECIMAL_STRING_LENGTH)
ndigits = DECIMAL_STRING_LENGTH - 1;
dm.ndigits = ndigits; /* Number of significant digits. */
#if defined(__sparc)
quadruple_to_decimal(arg, &dm, &dr, &ef);
#elif defined(__i386) || defined(__amd64)
extended_to_decimal((extended *)arg, &dm, &dr, &ef);
#else
#error Unknown architecture
#endif
*sign = dr.sign;
switch (dr.fpclass) {
case fp_normal:
case fp_subnormal:
*decpt = dr.exponent + ndigits;
for (i = 0; i < ndigits; i++)
buf[i] = dr.ds[i];
buf[ndigits] = 0;
break;
case fp_zero:
*decpt = 1;
for (i = 0; i < ndigits; i++)
buf[i] = '0';
buf[ndigits] = 0;
break;
default:
*decpt = 0;
__infnanstring(dr.fpclass, ndigits, buf);
break;
}
return (buf);
}
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