1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2002, 2003 Tim J. Robbins
5 * All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
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 <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37#include <stdlib.h>
38#include <wchar.h>
39#include <wctype.h>
40#include "xlocale_private.h"
41
42/*
43 * See wcstod() for comments as to the logic used.
44 */
45float
46wcstof_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
47		locale_t locale)
48{
49	static const mbstate_t initial;
50	mbstate_t mbs;
51	float val;
52	char *buf, *end;
53	const wchar_t *wcp;
54	size_t len;
55	size_t spaces;
56	FIX_LOCALE(locale);
57
58	wcp = nptr;
59	spaces = 0;
60	while (iswspace_l(*wcp, locale)) {
61		wcp++;
62		spaces++;
63	}
64
65	mbs = initial;
66	if ((len = wcsrtombs_l(NULL, &wcp, 0, &mbs, locale)) == (size_t)-1) {
67		if (endptr != NULL)
68			*endptr = (wchar_t *)nptr;
69		return (0.0);
70	}
71	if ((buf = malloc(len + 1)) == NULL) {
72		if (endptr != NULL)
73			*endptr = (wchar_t *)nptr;
74		return (0.0);
75	}
76	mbs = initial;
77	wcsrtombs_l(buf, &wcp, len + 1, &mbs, locale);
78
79	val = strtof_l(buf, &end, locale);
80
81	if (endptr != NULL) {
82		*endptr = (wchar_t *)nptr + (end - buf);
83		if (buf != end)
84			*endptr += spaces;
85	}
86
87	free(buf);
88
89	return (val);
90}
91float
92wcstof(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
93{
94	return wcstof_l(nptr, endptr, __get_locale());
95}
96