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/* $OpenBSD: _wcstod.h,v 1.4 2015/10/01 02:32:07 guenther Exp $ */
/* $NetBSD: wcstod.c,v 1.4 2001/10/28 12:08:43 yamt Exp $ */
/*-
* Copyright (c)1999, 2000, 2001 Citrus Project,
* 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.
*
* $Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstod.c,v 1.2 2001/09/27 16:23:57 yamt Exp $
*/
/*
* function template for wcstof, wcstod and wcstold.
*
* parameters:
* FUNCNAME : function name
* float_type : return type
* STRTOD_FUNC : conversion function
*/
float_type
FUNCNAME(const wchar_t *nptr, wchar_t **endptr)
{
const wchar_t *src;
size_t size;
const wchar_t *start;
const wchar_t *aftersign;
/*
* check length of string and call strtod
*/
src = nptr;
/* skip space first */
while (iswspace(*src)) {
src++;
}
/* get length of string */
start = src;
if (*src && wcschr(L"+-", *src))
src++;
aftersign = src;
if (wcsncasecmp(src, L"inf", 3) == 0) {
src += 3;
if (wcsncasecmp(src, L"inity", 5) == 0)
src += 5;
goto match;
}
if (wcsncasecmp(src, L"nan", 3) == 0) {
src += 3;
if (*src == L'(') {
size = 1;
while (src[size] != L'\0' && src[size] != L')')
size++;
if (src[size] == L')')
src += size + 1;
}
goto match;
}
size = wcsspn(src, L"0123456789");
src += size;
if (*src == L'.') {/* XXX use localeconv */
src++;
size = wcsspn(src, L"0123456789");
src += size;
}
if (*src && wcschr(L"Ee", *src)) {
src++;
if (*src && wcschr(L"+-", *src))
src++;
size = wcsspn(src, L"0123456789");
src += size;
}
match:
size = src - start;
/*
* convert to a char-string and pass it to strtod.
*/
if (src > aftersign) {
mbstate_t st;
char *buf;
char *end;
const wchar_t *s;
size_t size_converted;
float_type result;
size_t bufsize;
s = start;
memset(&st, 0, sizeof(st));
bufsize = wcsnrtombs(NULL, &s, size, 0, &st);
buf = malloc(bufsize + 1);
if (!buf) {
errno = ENOMEM; /* XXX */
goto fail;
}
s = start;
memset(&st, 0, sizeof(st));
size_converted = wcsnrtombs(buf, &s, size, bufsize, &st);
if (size_converted != bufsize) {
/* XXX should not happen */
free(buf);
errno = EILSEQ;
goto fail;
}
buf[bufsize] = 0;
result = STRTOD_FUNC(buf, &end);
if (endptr) {
const char *s = buf;
memset(&st, 0, sizeof(st));
size = mbsnrtowcs(NULL, &s, end - buf, 0, &st);
*endptr = (wchar_t*)start + size;
}
free(buf);
return result;
}
fail:
if (endptr)
*endptr = (wchar_t*)nptr;
return 0;
}
DEF_STRONG(FUNCNAME);
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