strtod.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include "synonyms.h"
#include <errno.h>
#include <stdio.h>
#include <values.h>
#include <floatingpoint.h>
#include <stdlib.h>
#include <sys/types.h>
#include "libc.h"
#include "xpg6.h"
double
strtod(const char *cp, char **ptr)
{
double x;
decimal_mode mr;
decimal_record dr;
fp_exception_field_type fs;
enum decimal_string_form form;
char *pechar;
int lc;
lc = (__xpg6 & _C99SUSv3_recognize_hexfp)? -1 : 0;
string_to_decimal((char **)&cp, MAXINT, lc, &dr, &form, &pechar);
if (ptr != NULL)
*ptr = (char *)cp;
if (form == invalid_form)
return (0.0); /* Shameful kluge for SVID's sake. */
#if defined(__sparc)
mr.rd = _QgetRD();
#elif defined(__i386) || defined(__amd64)
mr.rd = __xgetRD();
#else
#error Unknown architecture
#endif
if ((int)form < 0)
__hex_to_double(&dr, mr.rd, &x, &fs);
else
decimal_to_double(&x, &mr, &dr, &fs);
if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
errno = ERANGE;
return (x);
}
float
strtof(const char *cp, char **ptr)
{
float x;
decimal_mode mr;
decimal_record dr;
fp_exception_field_type fs;
enum decimal_string_form form;
char *pechar;
string_to_decimal((char **)&cp, MAXINT, -1, &dr, &form, &pechar);
if (ptr != NULL)
*ptr = (char *)cp;
if (form == invalid_form)
return (0.0f);
#if defined(__sparc)
mr.rd = _QgetRD();
#elif defined(__i386) || defined(__amd64)
mr.rd = __xgetRD();
#else
#error Unknown architecture
#endif
if ((int)form < 0)
__hex_to_single(&dr, mr.rd, &x, &fs);
else
decimal_to_single(&x, &mr, &dr, &fs);
if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
errno = ERANGE;
return (x);
}
long double
strtold(const char *cp, char **ptr)
{
long double x;
decimal_mode mr;
decimal_record dr;
fp_exception_field_type fs;
enum decimal_string_form form;
char *pechar;
string_to_decimal((char **)&cp, MAXINT, -1, &dr, &form, &pechar);
if (ptr != NULL)
*ptr = (char *)cp;
if (form == invalid_form)
return (0.0L);
#if defined(__sparc)
mr.rd = _QgetRD();
if ((int)form < 0)
__hex_to_quadruple(&dr, mr.rd, &x, &fs);
else
decimal_to_quadruple(&x, &mr, &dr, &fs);
#elif defined(__i386) || defined(__amd64)
mr.rd = __xgetRD();
if ((int)form < 0)
__hex_to_extended(&dr, mr.rd, (extended *)&x, &fs);
else
decimal_to_extended((extended *)&x, &mr, &dr, &fs);
#else
#error Unknown architecture
#endif
if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
errno = ERANGE;
return (x);
}