1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * Copyright 2025 Bill Sommerfeld
32 */
33
34 #include "lint.h"
35 #include <errno.h>
36 #include <stdio.h>
37 #include <values.h>
38 #include <floatingpoint.h>
39 #include <stdlib.h>
40 #include <sys/types.h>
41 #include <xlocale.h>
42 #include "libc.h"
43 #include "xpg6.h"
44
45 double
strtod(const char * cp,char ** ptr)46 strtod(const char *cp, char **ptr)
47 {
48 return (strtod_l(cp, ptr, uselocale(NULL)));
49 }
50
51 double
strtod_l(const char * cp,char ** ptr,locale_t loc)52 strtod_l(const char *cp, char **ptr, locale_t loc)
53 {
54 double x;
55 decimal_mode mr;
56 decimal_record dr;
57 fp_exception_field_type fs;
58 enum decimal_string_form form;
59 char *pechar;
60 int lc;
61
62 lc = (__xpg6 & _C99SUSv3_recognize_hexfp)? -1 : 0;
63 string_to_decimal_l((char **)&cp, MAXINT, lc, &dr, &form, &pechar, loc);
64 if (ptr != NULL)
65 *ptr = (char *)cp;
66 if (form == invalid_form)
67 return (0.0); /* Shameful kluge for SVID's sake. */
68 #if defined(__sparc)
69 mr.rd = _QgetRD();
70 #elif defined(__i386) || defined(__amd64)
71 mr.rd = __xgetRD();
72 #else
73 #error Unknown architecture
74 #endif
75 if ((int)form < 0)
76 __hex_to_double(&dr, mr.rd, &x, &fs);
77 else
78 decimal_to_double(&x, &mr, &dr, &fs);
79 if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
80 errno = ERANGE;
81 return (x);
82 }
83
84 float
strtof(const char * cp,char ** ptr)85 strtof(const char *cp, char **ptr)
86 {
87 return (strtof_l(cp, ptr, uselocale(NULL)));
88 }
89
90 float
strtof_l(const char * cp,char ** ptr,locale_t loc)91 strtof_l(const char *cp, char **ptr, locale_t loc)
92 {
93 float x;
94 decimal_mode mr;
95 decimal_record dr;
96 fp_exception_field_type fs;
97 enum decimal_string_form form;
98 char *pechar;
99
100 string_to_decimal_l((char **)&cp, MAXINT, -1, &dr, &form, &pechar, loc);
101 if (ptr != NULL)
102 *ptr = (char *)cp;
103 if (form == invalid_form)
104 return (0.0f);
105 #if defined(__sparc)
106 mr.rd = _QgetRD();
107 #elif defined(__i386) || defined(__amd64)
108 mr.rd = __xgetRD();
109 #else
110 #error Unknown architecture
111 #endif
112 if ((int)form < 0)
113 __hex_to_single(&dr, mr.rd, &x, &fs);
114 else
115 decimal_to_single(&x, &mr, &dr, &fs);
116 if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
117 errno = ERANGE;
118 return (x);
119 }
120
121 long double
strtold(const char * cp,char ** ptr)122 strtold(const char *cp, char **ptr)
123 {
124 return (strtold_l(cp, ptr, uselocale(NULL)));
125 }
126
127 long double
strtold_l(const char * cp,char ** ptr,locale_t loc)128 strtold_l(const char *cp, char **ptr, locale_t loc)
129 {
130 long double x;
131 decimal_mode mr;
132 decimal_record dr;
133 fp_exception_field_type fs;
134 enum decimal_string_form form;
135 char *pechar;
136
137 string_to_decimal_l((char **)&cp, MAXINT, -1, &dr, &form, &pechar, loc);
138 if (ptr != NULL)
139 *ptr = (char *)cp;
140 if (form == invalid_form)
141 return (0.0L);
142 #if defined(__sparc)
143 mr.rd = _QgetRD();
144 if ((int)form < 0)
145 __hex_to_quadruple(&dr, mr.rd, &x, &fs);
146 else
147 decimal_to_quadruple(&x, &mr, &dr, &fs);
148 #elif defined(__i386) || defined(__amd64)
149 mr.rd = __xgetRD();
150 if ((int)form < 0)
151 __hex_to_extended(&dr, mr.rd, (extended *)&x, &fs);
152 else
153 decimal_to_extended((extended *)&x, &mr, &dr, &fs);
154 #else
155 #error Unknown architecture
156 #endif
157 if (fs & ((1 << fp_overflow) | (1 << fp_underflow)))
158 errno = ERANGE;
159 return (x);
160 }
161