1 /*-
2 * Copyright (c) 2002, 2003 Tim J. Robbins
3 * All rights reserved.
4 *
5 * Copyright (c) 2011 The FreeBSD Foundation
6 * All rights reserved.
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD: head/lib/libc/locale/wcstold.c 326193 2017-11-25 17:12:48Z pfg $
32 */
33
34
35 #include <stdlib.h>
36 #include <wchar.h>
37 #include <wctype.h>
38 #include "xlocale_private.h"
39
40 /*
41 * See wcstod() for comments as to the logic used.
42 */
43 long double
wcstold_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,locale_t locale)44 wcstold_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
45 locale_t locale)
46 {
47 static const mbstate_t initial;
48 mbstate_t mbs;
49 long double val;
50 char *buf, *end;
51 const wchar_t *wcp;
52 size_t len;
53 size_t spaces;
54 FIX_LOCALE(locale);
55
56 wcp = nptr;
57 spaces = 0;
58 while (iswspace_l(*wcp, locale)) {
59 wcp++;
60 spaces++;
61 }
62
63 mbs = initial;
64 if ((len = wcsrtombs_l(NULL, &wcp, 0, &mbs, locale)) == (size_t)-1) {
65 if (endptr != NULL)
66 *endptr = (wchar_t *)nptr;
67 return (0.0);
68 }
69 if ((buf = malloc(len + 1)) == NULL) {
70 if (endptr != NULL)
71 *endptr = (wchar_t *)nptr;
72 return (0.0);
73 }
74 mbs = initial;
75 wcsrtombs_l(buf, &wcp, len + 1, &mbs, locale);
76
77 val = strtold_l(buf, &end, locale);
78
79 if (endptr != NULL) {
80 *endptr = (wchar_t *)nptr + (end - buf);
81 if (buf != end)
82 *endptr += spaces;
83 }
84
85 free(buf);
86
87 return (val);
88 }
89 long double
wcstold(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr)90 wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
91 {
92 return wcstold_l(nptr, endptr, __get_locale());
93 }
94