71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/*-
|
|
* Copyright (c) 2002, 2003 Tim J. Robbins
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include <wctype.h>
|
|
|
|
/*
|
|
* See wcstod() for comments as to the logic used.
|
|
*/
|
|
long double
|
|
wcstold(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
|
|
{
|
|
static const mbstate_t initial;
|
|
mbstate_t mbs;
|
|
long double val;
|
|
char *buf, *end;
|
|
const wchar_t *wcp;
|
|
size_t len;
|
|
|
|
while (iswspace(*nptr))
|
|
nptr++;
|
|
|
|
wcp = nptr;
|
|
mbs = initial;
|
|
if ((len = wcsrtombs(NULL, &wcp, 0, &mbs)) == (size_t)-1) {
|
|
if (endptr != NULL)
|
|
*endptr = (wchar_t *)nptr;
|
|
return (0.0);
|
|
}
|
|
if ((buf = malloc(len + 1)) == NULL)
|
|
return (0.0);
|
|
mbs = initial;
|
|
wcsrtombs(buf, &wcp, len + 1, &mbs);
|
|
|
|
val = strtold(buf, &end);
|
|
|
|
if (endptr != NULL)
|
|
*endptr = (wchar_t *)nptr + (end - buf);
|
|
|
|
free(buf);
|
|
|
|
return (val);
|
|
}
|