b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* $NetBSD: _wcstod.h,v 1.2 2010/12/16 17:42:27 wiz Exp $ */
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/*-
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* Copyright (c) 2002 Tim J. Robbins
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Original version ID:
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* FreeBSD: /repoman/r/ncvs/src/lib/libc/locale/wcstod.c,v 1.4 2004/04/07 09:47:56 tjr Exp
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* NetBSD: wcstod.c,v 1.8 2006/04/13 01:25:13 tnozaki Exp
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*/
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/*
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* function template for wcstof, wcstod, wcstold.
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*
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* parameters:
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* _FUNCNAME : function name
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* _RETURN_TYPE : return type
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* _STRTOD_FUNC : real conversion function
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*/
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#ifndef __WCSTOD_H_
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#define __WCSTOD_H_
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/*
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* Convert a string to a double-precision number.
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*
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* This is the wide-character counterpart of strto{f,d,ld}(). So that
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* we do not have to duplicate the code of strto{f,d,ld}() here,
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* we convert the supplied wide-character string to multibyte and
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* call strto{f,d,ld}() on the result.
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* This assumes that the multibyte encoding is compatible with ASCII
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* for at least the digits, radix character and letters.
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*/
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_RETURN_TYPE
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_FUNCNAME(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
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{
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const wchar_t *src, *start;
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_RETURN_TYPE val;
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char *buf, *end;
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size_t bufsiz, len;
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_DIAGASSERT(nptr != NULL);
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/* endptr may be null */
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src = nptr;
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while (iswspace((wint_t)*src) != 0)
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++src;
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if (*src == L'\0')
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goto no_convert;
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/*
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* Convert the supplied numeric wide-char. string to multibyte.
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*
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* We could attempt to find the end of the numeric portion of the
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* wide-char. string to avoid converting unneeded characters but
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* choose not to bother; optimising the uncommon case where
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* the input string contains a lot of text after the number
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* duplicates a lot of strto{f,d,ld}()'s functionality and
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* slows down the most common cases.
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*/
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start = src;
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len = wcstombs(NULL, src, 0);
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if (len == (size_t)-1)
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/* errno = EILSEQ */
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goto no_convert;
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_DIAGASSERT(len > 0);
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bufsiz = len;
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buf = (void *)malloc(bufsiz + 1);
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if (buf == NULL)
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/* errno = ENOMEM */
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goto no_convert;
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len = wcstombs(buf, src, bufsiz + 1);
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_DIAGASSERT(len == bufsiz);
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_DIAGASSERT(buf[len] == '\0');
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/* Let strto{f,d,ld}() do most of the work for us. */
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val = _STRTOD_FUNC(buf, &end);
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if (buf == end) {
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free(buf);
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goto no_convert;
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}
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/*
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* We only know where the number ended in the _multibyte_
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* representation of the string. If the caller wants to know
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* where it ended, count multibyte characters to find the
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* corresponding position in the wide-char string.
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*/
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if (endptr != NULL)
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/* XXX Assume each wide char is one byte. */
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*endptr = __UNCONST(start + (size_t)(end - buf));
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free(buf);
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return val;
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no_convert:
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if (endptr != NULL)
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*endptr = __UNCONST(nptr);
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return 0;
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}
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#endif /*__WCSTOD_H_*/
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