1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2002, 2003 Tim J. Robbins
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 *
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include <stdlib.h>
35 #include <wchar.h>
36 #include <wctype.h>
37 #include "xlocale_private.h"
38
39 /*
40 * See wcstod() for comments as to the logic used.
41 */
42 float
wcstof_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,locale_t locale)43 wcstof_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
44 locale_t locale)
45 {
46 static const mbstate_t initial;
47 mbstate_t mbs;
48 float val;
49 char *buf, *end;
50 const wchar_t *wcp;
51 size_t len;
52 size_t spaces;
53 FIX_LOCALE(locale);
54
55 wcp = nptr;
56 spaces = 0;
57 while (iswspace_l(*wcp, locale)) {
58 wcp++;
59 spaces++;
60 }
61
62 mbs = initial;
63 if ((len = wcsrtombs_l(NULL, &wcp, 0, &mbs, locale)) == (size_t)-1) {
64 if (endptr != NULL)
65 *endptr = (wchar_t *)nptr;
66 return (0.0);
67 }
68 if ((buf = malloc(len + 1)) == NULL) {
69 if (endptr != NULL)
70 *endptr = (wchar_t *)nptr;
71 return (0.0);
72 }
73 mbs = initial;
74 wcsrtombs_l(buf, &wcp, len + 1, &mbs, locale);
75
76 val = strtof_l(buf, &end, locale);
77
78 if (endptr != NULL) {
79 *endptr = (wchar_t *)nptr + (end - buf);
80 if (buf != end)
81 *endptr += spaces;
82 }
83
84 free(buf);
85
86 return (val);
87 }
88 float
wcstof(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr)89 wcstof(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
90 {
91 return wcstof_l(nptr, endptr, __get_locale());
92 }
93