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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 1988 by Sun Microsystems, Inc.
*/
/*
* gcvt - Floating output conversion to minimal length string
*/
#include "base_conversion.h"
#ifndef PRE41
#include <locale.h>
#endif
void
_gcvt(ndigit, pd, trailing, buf)
int ndigit;
decimal_record *pd;
char *buf;
{
char *p, *pstring;
int i;
static char *inf8 = "Infinity";
static char *inf3 = "Inf";
static char *nan = "NaN";
#ifdef PRE41
char decpt = '.';
#else
char decpt = *(localeconv()->decimal_point);
#endif
p = buf;
if (pd->sign)
*(p++) = '-';
switch (pd->fpclass) {
case fp_zero:
*(p++) = '0';
if (trailing != 0) {
*(p++) = decpt;
for (i = 0; i < ndigit - 1; i++)
*(p++) = '0';
}
break;
case fp_infinity:
if (ndigit < 8)
pstring = inf3;
else
pstring = inf8;
goto copystring;
case fp_quiet:
case fp_signaling:
pstring = nan;
copystring:
for (i = 0; *pstring != 0;)
*(p++) = *(pstring++);
break;
default:
if ((pd->exponent > 0) || (pd->exponent < -(ndigit + 3))) { /* E format. */
char estring[4];
int n;
i = 0;
*(p++) = pd->ds[0];
*(p++) = decpt;
for (i = 1; pd->ds[i] != 0;)
*(p++) = pd->ds[i++];
if (trailing == 0) { /* Remove trailing zeros and . */
p--;
while (*p == '0')
p--;
if (*p != decpt)
p++;
}
*(p++) = 'e';
n = pd->exponent + i - 1;
if (n >= 0)
*(p++) = '+';
else {
*(p++) = '-';
n = -n;
}
_fourdigitsquick((short unsigned) n, estring);
for (i = 0; estring[i] == '0'; i++); /* Find end of zeros. */
if (i > 2)
i = 2; /* Guarantee two zeros. */
for (; i <= 3;)
*(p++) = estring[i++]; /* Copy exp digits. */
} else { /* F format. */
if (pd->exponent >= (1 - ndigit)) { /* x.xxx */
for (i = 0; i < (ndigit + pd->exponent);)
*(p++) = pd->ds[i++];
*(p++) = decpt;
if (pd->ds[i] != 0) { /* More follows point. */
for (; i < ndigit;)
*(p++) = pd->ds[i++];
}
} else {/* 0.00xxxx */
*(p++) = '0';
*(p++) = decpt;
for (i = 0; i < -(pd->exponent + ndigit); i++)
*(p++) = '0';
for (i = 0; pd->ds[i] != 0;)
*(p++) = pd->ds[i++];
}
if (trailing == 0) { /* Remove trailing zeros and point. */
p--;
while (*p == '0')
p--;
if (*p != decpt)
p++;
}
}
}
*(p++) = 0;
}
char *
gconvert(number, ndigit, trailing, buf)
double number;
int ndigit, trailing;
char *buf;
{
decimal_mode dm;
decimal_record dr;
fp_exception_field_type fef;
dm.rd = fp_direction;
dm.df = floating_form;
dm.ndigits = ndigit;
double_to_decimal(&number, &dm, &dr, &fef);
_gcvt(ndigit, &dr, trailing, buf);
return (buf);
}
char *
gcvt(number, ndigit, buf)
double number;
int ndigit;
char *buf;
{
return (gconvert(number, ndigit, 0, buf));
}
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