4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* $NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 tnozaki Exp $ */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*-
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 2002 Tim J. Robbins
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * are met:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * documentation and/or other materials provided with the distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <LibConfig.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/EfiCdefs.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if defined(LIBC_SCCS) && !defined(lint)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if 0
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync__FBSDID("$FreeBSD: src/lib/libc/locale/wcsftime.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync__RCSID("$NetBSD: wcsftime.c,v 1.2 2006/10/04 14:19:16 tnozaki Exp $");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* LIBC_SCCS and not lint */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <errno.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <limits.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <stdlib.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <time.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <wchar.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <machine/int_limits.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Convert date and time to a wide-character string.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This is the wide-character counterpart of strftime(). So that we do not
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * have to duplicate the code of strftime(), we convert the format string to
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * multibyte, call strftime(), then convert the result back into wide
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * characters.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This technique loses in the presence of stateful multibyte encoding if any
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * of the conversions in the format string change conversion state. When
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * stateful encoding is implemented, we will need to reset the state between
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * format specifications in the format string.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncsize_t
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncwcsftime(wchar_t *wcs, size_t maxsize,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync const wchar_t *format, const struct tm *timeptr)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char *dst, *dstp, *sformat;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync size_t n, sflen;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int sverrno;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sformat = dst = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Convert the supplied format string to a multibyte representation
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * for strftime(), which only handles single-byte characters.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sflen = wcstombs(NULL, format, 0);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (sflen == (size_t)-1)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((sformat = malloc(sflen + 1)) == NULL)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync wcstombs(sformat, format, sflen + 1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Allocate memory for longest multibyte sequence that will fit
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * into the caller's buffer and call strftime() to fill it.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Then, copy and convert the result back into wide characters in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * the caller's buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (SIZE_T_MAX / MB_CUR_MAX <= maxsize) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /* maxsize is preposturously large - avoid int. overflow. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync errno = EINVAL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync dst = malloc(maxsize * MB_CUR_MAX);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (dst == NULL)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (strftime(dst, maxsize, sformat, timeptr) == 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync dstp = dst;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync n = mbstowcs(wcs, dstp, maxsize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (n == (size_t)-2 || n == (size_t)-1)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync goto error;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync free(sformat);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync free(dst);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncerror:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sverrno = errno;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync free(sformat);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync free(dst);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync errno = sverrno;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}