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This has already been done for most files that have the Foundation as the only listed copyright holder. Do it now for files that list multiple copyright holders, but have the Foundation copyright in its own section. Sponsored by: The FreeBSD Foundation
124 lines
4 KiB
C
124 lines
4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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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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* Copyright (c) 2011 The FreeBSD Foundation
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*
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 "xlocale_private.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_l(wchar_t * __restrict wcs, size_t maxsize,
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const wchar_t * __restrict format, const struct tm * __restrict timeptr,
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locale_t locale)
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{
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static const mbstate_t initial;
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mbstate_t mbs;
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char *dst, *sformat;
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const char *dstp;
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const wchar_t *formatp;
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size_t n, sflen;
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int sverrno;
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FIX_LOCALE(locale);
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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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mbs = initial;
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formatp = format;
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sflen = wcsrtombs_l(NULL, &formatp, 0, &mbs, locale);
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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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mbs = initial;
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wcsrtombs_l(sformat, &formatp, sflen + 1, &mbs, locale);
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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 prepostorously large - avoid int. overflow. */
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errno = EINVAL;
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goto error;
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}
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if ((dst = malloc(maxsize * MB_CUR_MAX)) == NULL)
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goto error;
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if (strftime_l(dst, maxsize, sformat, timeptr, locale) == 0)
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goto error;
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dstp = dst;
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mbs = initial;
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n = mbsrtowcs_l(wcs, &dstp, maxsize, &mbs, locale);
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if (n == (size_t)-2 || n == (size_t)-1 || dstp != NULL)
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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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size_t
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wcsftime(wchar_t * __restrict wcs, size_t maxsize,
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const wchar_t * __restrict format, const struct tm * __restrict timeptr)
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{
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return wcsftime_l(wcs, maxsize, format, timeptr, __get_locale());
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}
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