2aa62f2bc9
This set of three packages: AppPkg, StdLib, StdLibPrivateInternalFiles; contains the implementation of libraries based upon non-UEFI standards such as ISO/IEC-9899, the library portion of the C Language Standard, POSIX, etc. AppPkg contains applications that make use of the standard libraries defined in the StdLib Package. StdLib contains header (include) files and the implementations of the standard libraries. StdLibPrivateInternalFiles contains files for the exclusive use of the library implementations in StdLib. These files should never be directly referenced from applications or other code. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11600 6f19259b-4bc3-4df7-8a09-765794883524
127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/* $NetBSD: _wcstod.h,v 1.1 2006/04/15 12:17:23 tnozaki 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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