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	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
	41	extern size_t __wcs_end_offset(const char * __restrict buf, const char * __restrict end, locale_t loc);
	42
	43	long double
	44	wcstold_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
	89	long double
	90	wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
	91	{
	92	return wcstold_l(nptr, endptr, __current_locale());
	93	}