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
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 1987 by Sun Microsystems, Inc.
*/
#include <errno.h>
#include <stdio.h>
#include <values.h>
#include <floatingpoint.h>
double
strtod(cp, ptr)
char *cp;
char **ptr;
{
double x;
decimal_mode mr;
decimal_record dr;
fp_exception_field_type fs;
enum decimal_string_form form;
char *pechar;
string_to_decimal(&cp, MAXINT, 0, &dr, &form, &pechar);
if (ptr != (char **) NULL)
*ptr = cp;
if (form == invalid_form)
return 0.0; /* Shameful kluge for SVID's sake. */
mr.rd = fp_direction;
decimal_to_double(&x, &mr, &dr, &fs);
if (fs & (1 << fp_overflow)) { /* Overflow. */
errno = ERANGE;
}
if (fs & (1 << fp_underflow)) { /* underflow */
errno = ERANGE;
}
return x;
}