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
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/* $NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 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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#include <LibConfig.h>
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#include <sys/EfiCdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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__FBSDID("$FreeBSD: src/lib/libc/locale/wcsftime.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");
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#else
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__RCSID("$NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 tnozaki Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <time.h>
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#include <wchar.h>
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#include <machine/int_limits.h>
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/*
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* Convert date and time to a wide-character string.
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*
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* This is the wide-character counterpart of strftime(). So that we do not
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* have to duplicate the code of strftime(), we convert the format string to
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* multibyte, call strftime(), then convert the result back into wide
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* characters.
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*
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* This technique loses in the presence of stateful multibyte encoding if any
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* of the conversions in the format string change conversion state. When
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* stateful encoding is implemented, we will need to reset the state between
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* format specifications in the format string.
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*/
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size_t
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wcsftime(wchar_t *wcs, size_t maxsize,
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const wchar_t *format, const struct tm *timeptr)
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{
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char *dst, *dstp, *sformat;
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size_t n, sflen;
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int sverrno;
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sformat = dst = NULL;
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/*
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* Convert the supplied format string to a multibyte representation
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* for strftime(), which only handles single-byte characters.
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*/
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sflen = wcstombs(NULL, format, 0);
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if (sflen == (size_t)-1)
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goto error;
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if ((sformat = malloc(sflen + 1)) == NULL)
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goto error;
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wcstombs(sformat, format, sflen + 1);
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/*
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* Allocate memory for longest multibyte sequence that will fit
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* into the caller's buffer and call strftime() to fill it.
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* Then, copy and convert the result back into wide characters in
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* the caller's buffer.
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*/
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if (SIZE_T_MAX / MB_CUR_MAX <= maxsize) {
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/* maxsize is preposturously large - avoid int. overflow. */
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errno = EINVAL;
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goto error;
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}
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dst = malloc(maxsize * MB_CUR_MAX);
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if (dst == NULL)
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goto error;
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if (strftime(dst, maxsize, sformat, timeptr) == 0)
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goto error;
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dstp = dst;
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n = mbstowcs(wcs, dstp, maxsize);
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if (n == (size_t)-2 || n == (size_t)-1)
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goto error;
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free(sformat);
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free(dst);
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return n;
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error:
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sverrno = errno;
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free(sformat);
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free(dst);
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errno = sverrno;
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return 0;
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}
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