From 3b9a4e5ef78e3785e647fd183ee9404b9a72940a Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Wed, 28 Mar 2007 21:37:03 +0000
Subject: [PATCH] New module 'unistr/u32-mbtoucr'.

---
 lib/unistr/u32-mbtoucr.c   | 41 ++++++++++++++++++++++++++++++++++++++
 modules/unistr/u32-mbtoucr | 24 ++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 lib/unistr/u32-mbtoucr.c
 create mode 100644 modules/unistr/u32-mbtoucr

diff --git a/lib/unistr/u32-mbtoucr.c b/lib/unistr/u32-mbtoucr.c
new file mode 100644
index 0000000000..48afbcddfa
--- /dev/null
+++ b/lib/unistr/u32-mbtoucr.c
@@ -0,0 +1,41 @@
+/* Look at first character in UTF-32 string, returning an error code.
+   Copyright (C) 2002, 2006-2007 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+int
+u32_mbtoucr (ucs4_t *puc, const uint32_t *s, size_t n)
+{
+  uint32_t c = *s;
+
+  if (c < 0xd800 || (c >= 0xe000 && c < 0x110000))
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    {
+      /* invalid multibyte character */
+      *puc = 0xfffd;
+      return -1;
+    }
+}
diff --git a/modules/unistr/u32-mbtoucr b/modules/unistr/u32-mbtoucr
new file mode 100644
index 0000000000..37493b71c9
--- /dev/null
+++ b/modules/unistr/u32-mbtoucr
@@ -0,0 +1,24 @@
+Description:
+Look at first character in UTF-32 string, returning an error code upon failure.
+
+Files:
+lib/unistr/u32-mbtoucr.c
+
+Depends-on:
+unistr/base
+
+configure.ac:
+gl_MODULE_INDICATOR([unistr/u32-mbtoucr])
+
+Makefile.am:
+lib_SOURCES += unistr/u32-mbtoucr.c
+
+Include:
+"unistr.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+
-- 
2.30.2