The next module for ISO C 99 multibyte functions: wctob.
2008-12-18 Bruno Haible <br...@clisp.org>
New module 'wctob'.
* lib/wchar.in.h (wctob): New declaration.
* lib/wctob.c: New file.
* m4/wctob.m4: New file.
* modules/wctob: New file.
* m4/wchar.m4 (gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCTOB and
HAVE_WCTOB.
* modules/wchar (Makefile.am): Substitute GNULIB_WCTOB and HAVE_WCTOB.
* doc/posix-functions/wctob.texi: Document the new module.
================================= lib/wctob.c =================================
/* Convert wide character to unibyte character.
Copyright (C) 2008 Free Software Foundation, Inc.
Written by Bruno Haible <br...@clisp.org>, 2008.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <wchar.h>
#include <stdio.h>
#include <stdlib.h>
int
wctob (wint_t wc)
{
char buf[64];
if (!(MB_CUR_MAX <= sizeof (buf)))
abort ();
if (wctomb (buf, wc) == 1)
return (unsigned char) buf[0];
else
return EOF;
}
================================= m4/wctob.m4 =================================
# wctob.m4 serial 1
dnl Copyright (C) 2008 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_WCTOB],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([wctob])
if test $ac_cv_func_wctob = no; then
HAVE_WCTOB=0
gl_REPLACE_WCHAR_H
AC_LIBOBJ([wctob])
gl_PREREQ_WCTOB
fi
])
# Prerequisites of lib/wctob.c.
AC_DEFUN([gl_PREREQ_WCTOB], [
:
])
================================ modules/wctob ================================
Description:
wctob() function: convert wide character to unibyte character.
Files:
lib/wctob.c
m4/wctob.m4
Depends-on:
wchar
configure.ac:
gl_FUNC_WCTOB
gl_WCHAR_MODULE_INDICATOR([wctob])
Makefile.am:
Include:
<wchar.h>
License:
LGPL
Maintainer:
Bruno Haible
===============================================================================
--- lib/wchar.in.h.orig 2008-12-19 03:06:19.000000000 +0100
+++ lib/wchar.in.h 2008-12-19 03:06:05.000000000 +0100
@@ -85,6 +85,20 @@
#endif
+/* Convert a wide character to a single-byte character. */
+#if @GNULIB_WCTOB@
+# if !...@have_wctob@
+extern int wctob (wint_t wc);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef wctob
+# define wctob(w) \
+ (GL_LINK_WARNING ("wctob is unportable - " \
+ "use gnulib module wctob for portability"), \
+ wctob (w))
+#endif
+
+
/* Test whether *PS is in the initial state. */
#if @GNULIB_MBSINIT@
# if !...@have_mbsinit@
--- m4/wchar.m4.orig 2008-12-19 03:06:19.000000000 +0100
+++ m4/wchar.m4 2008-12-19 03:06:05.000000000 +0100
@@ -7,7 +7,7 @@
dnl Written by Eric Blake.
-# wchar.m4 serial 8
+# wchar.m4 serial 9
AC_DEFUN([gl_WCHAR_H],
[
@@ -62,10 +62,12 @@
AC_DEFUN([gl_WCHAR_H_DEFAULTS],
[
GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
+ GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
+ HAVE_WCTOB=1; AC_SUBST([HAVE_WCTOB])
HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
--- modules/wchar.orig 2008-12-19 03:06:19.000000000 +0100
+++ modules/wchar 2008-12-19 03:06:05.000000000 +0100
@@ -24,12 +24,14 @@
sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
-e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
-e 's|@''NEXT_WCHAR_H''@|$(NEXT_WCHAR_H)|g' \
- -e 's/@''HAVE_WCHAR_H''@/$(HAVE_WCHAR_H)/g' \
+ -e 's|@''HAVE_WCHAR_H''@|$(HAVE_WCHAR_H)|g' \
-e 's|@''GNULIB_BTOWC''@|$(GNULIB_BTOWC)|g' \
+ -e 's|@''GNULIB_WCTOB''@|$(GNULIB_WCTOB)|g' \
-e 's|@''GNULIB_MBSINIT''@|$(GNULIB_MBSINIT)|g' \
-e 's|@''GNULIB_WCWIDTH''@|$(GNULIB_WCWIDTH)|g' \
- -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \
+ -e 's|@''HAVE_WINT_T''@|$(HAVE_WINT_T)|g' \
-e 's|@''HAVE_BTOWC''@|$(HAVE_BTOWC)|g' \
+ -e 's|@''HAVE_WCTOB''@|$(HAVE_WCTOB)|g' \
-e 's|@''HAVE_MBSINIT''@|$(HAVE_MBSINIT)|g' \
-e 's|@''HAVE_DECL_WCWIDTH''@|$(HAVE_DECL_WCWIDTH)|g' \
-e 's|@''REPLACE_WCWIDTH''@|$(REPLACE_WCWIDTH)|g' \
--- doc/posix-functions/wctob.texi.orig 2008-12-19 03:06:19.000000000 +0100
+++ doc/posix-functions/wctob.texi 2008-12-19 03:06:05.000000000 +0100
@@ -4,18 +4,18 @@
POSIX specification:
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/wctob.html}
-Gnulib module: ---
+Gnulib module: wctob
Portability problems fixed by Gnulib:
@itemize
+...@item
+This function is missing on some platforms:
+HP-UX 11, IRIX 5.3, Solaris 2.6, mingw, Interix 3.5.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
-This function is missing on some platforms:
-HP-UX 11, IRIX 5.3, Solaris 2.6, mingw, Interix 3.5.
-...@item
On Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
@end itemize
