From 5f5cd9d0b813ebc54b63008e1ccea578606e81e4 Mon Sep 17 00:00:00 2001 From: tjr Date: Wed, 11 Sep 2002 08:57:11 +0000 Subject: Add an implementation of wcsftime() (wide character version of strftime()). --- lib/libc/locale/Makefile.inc | 6 ++- lib/libc/locale/wcsftime.3 | 61 +++++++++++++++++++++++++++++++ lib/libc/locale/wcsftime.c | 87 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 152 insertions(+), 2 deletions(-) create mode 100644 lib/libc/locale/wcsftime.3 create mode 100644 lib/libc/locale/wcsftime.c (limited to 'lib/libc/locale') diff --git a/lib/libc/locale/Makefile.inc b/lib/libc/locale/Makefile.inc index f3f4644..fd76446 100644 --- a/lib/libc/locale/Makefile.inc +++ b/lib/libc/locale/Makefile.inc @@ -11,7 +11,8 @@ SRCS+= big5.c btowc.c collate.c collcmp.c euc.c fix_grouping.c frune.c \ mbrtowc.c mbrune.c mbsinit.c mbsrtowcs.c mbtowc.c mbstowcs.c \ mskanji.c nl_langinfo.c nomacros.c none.c rune.c \ runetype.c setinvalidrune.c setlocale.c setrunelocale.c table.c \ - tolower.c toupper.c utf2.c wcrtomb.c wcsrtombs.c wcstol.c wcstombs.c \ + tolower.c toupper.c utf2.c wcrtomb.c wcsrtombs.c wcsftime.c wcstol.c \ + wcstombs.c \ wcstoul.c wctob.c wctomb.c wctrans.c wctype.c wcwidth.c .if ${LIB} == "c" @@ -22,7 +23,8 @@ MAN+= btowc.3 \ mbsrtowcs.3 multibyte.3 \ nl_langinfo.3 \ rune.3 \ - setlocale.3 toascii.3 tolower.3 toupper.3 towlower.3 wcrtomb.3 \ + setlocale.3 toascii.3 tolower.3 toupper.3 towlower.3 wcsftime.3 \ + wcrtomb.3 \ wcsrtombs.3 wcstol.3 \ wctrans.3 wctype.3 wcwidth.3 MAN+= euc.4 utf2.4 diff --git a/lib/libc/locale/wcsftime.3 b/lib/libc/locale/wcsftime.3 new file mode 100644 index 0000000..3c43469 --- /dev/null +++ b/lib/libc/locale/wcsftime.3 @@ -0,0 +1,61 @@ +.\" Copyright (c) 2002 Tim J. Robbins +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd September 8, 2002 +.Dt WCSFTIME 3 +.Os +.Sh NAME +.Nm wcsftime +.Nd "convert date and time to a wide-character string" +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In wchar.h +.Ft size_t +.Fn wcsftime "wchar_t * restrict wcs" "size_t maxsize" "const wchar_t * restrict format" "const struct tm * restrict timeptr" +.Sh DESCRIPTION +The +.Fn wcsftime +function is equivalent to the +.Fn strftime +function except for the types of its arguments. +Refer to +.Xr strftime 3 +for a detailed description. +.Sh COMPATIBILITY +Some early implementations of +.Fn wcsftime +had a format argument with type +.Vt "const char *" +instead of +.Vt "const wchar_t *" . +.Sh SEE ALSO +.Xr strftime 3 +.Sh STANDARDS +The +.Fn wcsftime +function conforms to +.St -isoC-99 . diff --git a/lib/libc/locale/wcsftime.c b/lib/libc/locale/wcsftime.c new file mode 100644 index 0000000..31a1c4c --- /dev/null +++ b/lib/libc/locale/wcsftime.c @@ -0,0 +1,87 @@ +/*- + * Copyright (c) 2002 Tim J. Robbins + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include + +/* + * Convert date and time to a wide-character string. + * + * This is the wide-character counterpart of strftime(). So that we do not + * have to duplicate the code of strftime(), we convert the format string to + * multibyte, call strftime(), then convert the result back into wide + * characters. + * + * This technique loses in the presence of stateful multibyte encoding if any + * of the conversions in the format string change conversion state. When + * stateful encoding is implemented, we will need to reset the state between + * format specifications in the format string. + */ +size_t +wcsftime(wchar_t * __restrict wcs, size_t maxsize, + const wchar_t * __restrict format, const struct tm * __restrict timeptr) +{ + static const mbstate_t initial; + mbstate_t state; + char *dst, *sformat; + size_t n, sflen; + + /* + * Convert the supplied format string to a multibyte representation + * for strftime(), which only handles single-byte characters. + */ + state = initial; + sflen = wcsrtombs(NULL, &format, 0, &state); + if (sflen == (size_t)-1) + return (0); + sformat = alloca(sflen + 1); + state = initial; + wcsrtombs(sformat, &format, sflen + 1, &state); + + /* + * Allocate memory for longest multibyte sequence that will fit + * into the caller's buffer and call strftime() to fill it. + * Then, copy and convert the result back into wide characters in + * the caller's buffer. + */ + if (SIZE_T_MAX / MB_CUR_MAX <= maxsize) + /* maxsize is prepostorously large - avoid int. overflow. */ + return (0); + dst = alloca(maxsize * MB_CUR_MAX); + if (strftime(dst, maxsize, sformat, timeptr) == 0) + return (0); + state = initial; + n = mbsrtowcs(wcs, (const char **)&dst, maxsize, &state); + if (n == (size_t)-2 || n == (size_t)-1 || dst != NULL) + return (0); + + return (n); +} -- cgit v1.1