1/*-
2 * Copyright (c) 2002, 2003 Tim J. Robbins
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: src/lib/libc/locale/wcstold.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");
29
30#include "xlocale_private.h"
31
32#include <stdlib.h>
33#include <wchar.h>
34#include <wctype.h>
35#include <_simple.h>
36
37/*
38 * See wcstod() for comments as to the logic used.
39 */
40
41extern size_t __wcs_end_offset(const char * __restrict buf, const char * __restrict end, locale_t loc);
42
43long double
44wcstold_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
45    locale_t loc)
46{
47	static const mbstate_t initial;
48	mbstate_t mbs;
49	long double val;
50	char *buf, *end;
51	size_t len;
52	locale_t ctype;
53	_SIMPLE_STRING b;
54	char mb[MB_CUR_MAX + 1];
55	const wchar_t *nptr0 = nptr;
56	const wchar_t *first;
57
58	NORMALIZE_LOCALE(loc);
59	ctype = __numeric_ctype(loc);
60
61	while (iswspace_l(*nptr, ctype))
62		nptr++;
63
64	if ((b = _simple_salloc()) == NULL)
65		return (0.0);
66
67	first = nptr;
68	mbs = initial;
69	while (*nptr && (len = wcrtomb_l(mb, *nptr, &mbs, ctype)) != (size_t)-1) {
70		mb[len] = 0;
71		if (_simple_sappend(b, mb) < 0) { /* no memory */
72			_simple_sfree(b);
73			return (0.0);
74		}
75		nptr++;
76	}
77
78	buf = _simple_string(b);
79	val = strtold_l(buf, &end, loc);
80
81	if (endptr != NULL)
82		*endptr = (end == buf) ? (wchar_t *)nptr0 : ((wchar_t *)first + __wcs_end_offset(buf, end, loc));
83
84	_simple_sfree(b);
85
86	return (val);
87}
88
89long double
90wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
91{
92	return wcstold_l(nptr, endptr, __current_locale());
93}
94