>From 3eeecb071856c21573b1faf0dff1a5e76a7ffa55 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sat, 25 Jan 2020 23:50:35 +0100
Subject: [PATCH 08/25] c32iscntrl: New module.

* lib/c32iscntrl.c: New file.
* modules/c32iscntrl: New file.
* doc/posix-functions/iswcntrl.texi: Mention the new module.
---
 ChangeLog                         |  7 +++++++
 doc/posix-functions/iswcntrl.texi |  7 +++++--
 lib/c32iscntrl.c                  | 25 +++++++++++++++++++++++++
 modules/c32iscntrl                | 33 +++++++++++++++++++++++++++++++++
 4 files changed, 70 insertions(+), 2 deletions(-)
 create mode 100644 lib/c32iscntrl.c
 create mode 100644 modules/c32iscntrl

diff --git a/ChangeLog b/ChangeLog
index 0cedfbb..ac130a2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2020-01-25  Bruno Haible  <address@hidden>
 
+	c32iscntrl: New module.
+	* lib/c32iscntrl.c: New file.
+	* modules/c32iscntrl: New file.
+	* doc/posix-functions/iswcntrl.texi: Mention the new module.
+
+2020-01-25  Bruno Haible  <address@hidden>
+
 	c32isblank: Add tests.
 	* tests/test-c32isblank.c: New file.
 	* tests/test-c32isblank.sh: New file.
diff --git a/doc/posix-functions/iswcntrl.texi b/doc/posix-functions/iswcntrl.texi
index a71a419..77ee139 100644
--- a/doc/posix-functions/iswcntrl.texi
+++ b/doc/posix-functions/iswcntrl.texi
@@ -20,8 +20,11 @@ OS X 10.8.
 Portability problems not fixed by Gnulib:
 @itemize
 @item
-On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and therefore cannot
-accommodate all Unicode characters.
+On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and
+therefore cannot accommodate all Unicode characters.
+However, the Gnulib function @code{c32iscntrl}, provided by Gnulib module
+@code{c32iscntrl}, operates on 32-bit wide characters and therefore does not
+have this limitation.
 @item
 This function returns 0 for U+2028 (LINE SEPARATOR) and
 U+2029 (PARAGRAPH SEPARATOR) on some platforms:
diff --git a/lib/c32iscntrl.c b/lib/c32iscntrl.c
new file mode 100644
index 0000000..cad2091
--- /dev/null
+++ b/lib/c32iscntrl.c
@@ -0,0 +1,25 @@
+/* Test 32-bit wide character for being a control character.
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+   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 2, 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 <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <uchar.h>
+
+#define FUNC c32iscntrl
+#define WCHAR_FUNC iswcntrl
+#define UCS_FUNC uc_is_cntrl
+#include "c32is-impl.h"
diff --git a/modules/c32iscntrl b/modules/c32iscntrl
new file mode 100644
index 0000000..4fb6484
--- /dev/null
+++ b/modules/c32iscntrl
@@ -0,0 +1,33 @@
+Description:
+c32iscntrl() function: test 32-bit wide character for being a control character.
+
+Files:
+lib/c32iscntrl.c
+lib/c32is-impl.h
+m4/mbrtoc32.m4
+
+Depends-on:
+uchar
+wchar
+wctype-h
+localcharset    [test $REPLACE_MBSTATE_T = 1]
+streq           [test $REPLACE_MBSTATE_T = 1]
+unictype/ctype-cntrl
+verify
+
+configure.ac:
+AC_REQUIRE([gl_UCHAR_H])
+AC_REQUIRE([gl_MBRTOC32_SANITYCHECK])
+gl_UCHAR_MODULE_INDICATOR([c32iscntrl])
+
+Makefile.am:
+lib_SOURCES += c32iscntrl.c
+
+Include:
+<uchar.h>
+
+License:
+LGPLv3+ or GPLv2
+
+Maintainer:
+Bruno Haible
-- 
2.7.4