2 * Copyright (c) 2002 Tim J. Robbins
5 * Copyright (c) 2011 The FreeBSD Foundation
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
40 #include "xlocale_private.h"
43 * Convert date and time to a wide-character string.
45 * This is the wide-character counterpart of strftime(). So that we do not
46 * have to duplicate the code of strftime(), we convert the format string to
47 * multibyte, call strftime(), then convert the result back into wide
50 * This technique loses in the presence of stateful multibyte encoding if any
51 * of the conversions in the format string change conversion state. When
52 * stateful encoding is implemented, we will need to reset the state between
53 * format specifications in the format string.
56 wcsftime_l(wchar_t * __restrict wcs, size_t maxsize,
57 const wchar_t * __restrict format, const struct tm * __restrict timeptr,
60 static const mbstate_t initial;
64 const wchar_t *formatp;
72 * Convert the supplied format string to a multibyte representation
73 * for strftime(), which only handles single-byte characters.
77 sflen = wcsrtombs_l(NULL, &formatp, 0, &mbs, locale);
78 if (sflen == (size_t)-1)
80 if ((sformat = malloc(sflen + 1)) == NULL)
83 wcsrtombs_l(sformat, &formatp, sflen + 1, &mbs, locale);
86 * Allocate memory for longest multibyte sequence that will fit
87 * into the caller's buffer and call strftime() to fill it.
88 * Then, copy and convert the result back into wide characters in
89 * the caller's buffer.
91 if (SIZE_T_MAX / MB_CUR_MAX <= maxsize) {
92 /* maxsize is prepostorously large - avoid int. overflow. */
96 if ((dst = malloc(maxsize * MB_CUR_MAX)) == NULL)
98 if (strftime_l(dst, maxsize, sformat, timeptr, locale) == 0)
102 n = mbsrtowcs_l(wcs, &dstp, maxsize, &mbs, locale);
103 if (n == (size_t)-2 || n == (size_t)-1 || dstp != NULL)
118 wcsftime(wchar_t * __restrict wcs, size_t maxsize,
119 const wchar_t * __restrict format, const struct tm * __restrict timeptr)
121 return wcsftime_l(wcs, maxsize, format, timeptr, __get_locale());