xref: /onnv-gate/usr/src/lib/libbc/libc/gen/common/strtod.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
23*0Sstevel@tonic-gate 
24*0Sstevel@tonic-gate /*
25*0Sstevel@tonic-gate  * Copyright (c) 1987 by Sun Microsystems, Inc.
26*0Sstevel@tonic-gate  */
27*0Sstevel@tonic-gate 
28*0Sstevel@tonic-gate #include <errno.h>
29*0Sstevel@tonic-gate #include <stdio.h>
30*0Sstevel@tonic-gate #include <values.h>
31*0Sstevel@tonic-gate #include <floatingpoint.h>
32*0Sstevel@tonic-gate 
33*0Sstevel@tonic-gate double
strtod(cp,ptr)34*0Sstevel@tonic-gate strtod(cp, ptr)
35*0Sstevel@tonic-gate 	char           *cp;
36*0Sstevel@tonic-gate 	char          **ptr;
37*0Sstevel@tonic-gate {
38*0Sstevel@tonic-gate 	double          x;
39*0Sstevel@tonic-gate 	decimal_mode    mr;
40*0Sstevel@tonic-gate 	decimal_record  dr;
41*0Sstevel@tonic-gate 	fp_exception_field_type fs;
42*0Sstevel@tonic-gate 	enum decimal_string_form form;
43*0Sstevel@tonic-gate 	char           *pechar;
44*0Sstevel@tonic-gate 
45*0Sstevel@tonic-gate 	string_to_decimal(&cp, MAXINT, 0, &dr, &form, &pechar);
46*0Sstevel@tonic-gate 	if (ptr != (char **) NULL)
47*0Sstevel@tonic-gate 		*ptr = cp;
48*0Sstevel@tonic-gate 	if (form == invalid_form)
49*0Sstevel@tonic-gate 		return 0.0;	/* Shameful kluge for SVID's sake. */
50*0Sstevel@tonic-gate 	mr.rd = fp_direction;
51*0Sstevel@tonic-gate 	decimal_to_double(&x, &mr, &dr, &fs);
52*0Sstevel@tonic-gate 	if (fs & (1 << fp_overflow)) {	/* Overflow. */
53*0Sstevel@tonic-gate 		errno = ERANGE;
54*0Sstevel@tonic-gate 	}
55*0Sstevel@tonic-gate 	if (fs & (1 << fp_underflow)) {	/* underflow */
56*0Sstevel@tonic-gate 		errno = ERANGE;
57*0Sstevel@tonic-gate 	}
58*0Sstevel@tonic-gate 	return x;
59*0Sstevel@tonic-gate }
60