--- a/ChangeLog	Sat Mar 26 02:18:11 2011 +0100
+++ b/ChangeLog	Sat Mar 26 00:52:51 2011 +0100
@@ -1,3 +1,10 @@
+2011-03-25  Bruno Haible  <bruno@clisp.org>
+
+	New module 'unictype/combining-class-name'.
+	* lib/unictype.in.h (uc_combining_class_name): New declaration.
+	* lib/unictype/combiningclass_name.c: New file.
+	* modules/unictype/combining-class-name: New file.
+
 2011-03-25  Bruno Haible  <bruno@clisp.org>
 
 	unictype/combining-class: Rename source files.

--- a/lib/unictype.in.h	Sat Mar 26 02:18:11 2011 +0100
+++ b/lib/unictype.in.h	Sat Mar 26 00:52:51 2011 +0100
@@ -264,6 +264,10 @@
 extern int
        uc_combining_class (ucs4_t uc);
 
+/* Return the name of a canonical combining class.  */
+extern const char *
+       uc_combining_class_name (int ccc);
+
 /* ========================================================================= */
 
 /* Field 4 of Unicode Character Database: Bidi class.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/unictype/combiningclass_name.c	Sat Mar 26 00:52:51 2011 +0100
@@ -0,0 +1,130 @@
+/* Canonical combining classes of Unicode characters.
+   Copyright (C) 2002, 2006-2007, 2011 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unictype.h"
+
+#include <stdlib.h>
+
+static const signed char u_combining_class_index_part1[10] =
+{
+   0, /* Not Reordered */
+   1, /* Overlay */
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+   2, /* Nukta */
+   3, /* Kana Voicing */
+   4  /* Virama */
+};
+static const signed char u_combining_class_index_part2[241 - 200] =
+{
+   5, /* Attached Below Left */
+  -1,
+   6, /* Attached Below */
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+   7, /* Attached Above */
+  -1,
+   8, /* Attached Above Right */
+  -1,
+   9, /* Below Left */
+  -1,
+  10, /* Below */
+  -1,
+  11, /* Below Right */
+  -1,
+  12, /* Left */
+  -1,
+  13, /* Right */
+  -1,
+  14, /* Above Left */
+  -1,
+  15, /* Above */
+  -1,
+  16, /* Above Right */
+  17, /* Double Below */
+  18, /* Double Above */
+  -1,
+  -1,
+  -1,
+  -1,
+  -1,
+  19  /* Iota Subscript */
+};
+
+static const char u_combining_class_name[20][5] =
+{
+  "NR",   /* Not Reordered */
+  "OV",   /* Overlay */
+  "NK",   /* Nukta */
+  "KV",   /* Kana Voicing */
+  "VR",   /* Virama */
+  "ATBL", /* Attached Below Left */
+  "ATB",  /* Attached Below */
+  "ATA",  /* Attached Above */
+  "ATAR", /* Attached Above Right */
+  "BL",   /* Below Left */
+  "B",    /* Below */
+  "BR",   /* Below Right */
+  "L",    /* Left */
+  "R",    /* Right */
+  "AL",   /* Above Left */
+  "A",    /* Above */
+  "AR",   /* Above Right */
+  "DB",   /* Double Below */
+  "DA",   /* Double Above */
+  "IS"    /* Iota Subscript */
+};
+
+const char *
+uc_combining_class_name (int ccc)
+{
+  if (ccc >= 0)
+    {
+      int index;
+
+      if (ccc < 10)
+        index = u_combining_class_index_part1[ccc];
+      else if (ccc >= 200 && ccc < 241)
+        index = u_combining_class_index_part2[ccc - 200];
+      else
+        return NULL;
+
+      if (index >= 0)
+        {
+          if (index < sizeof (u_combining_class_name) / sizeof (u_combining_class_name[0]))
+            return u_combining_class_name[index];
+          else
+            abort ();
+        }
+    }
+  return NULL;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/unictype/combining-class-name	Sat Mar 26 00:52:51 2011 +0100
@@ -0,0 +1,25 @@
+Description:
+Name of Unicode character canonical combining class.
+
+Files:
+lib/unictype/combiningclass_name.c
+
+Depends-on:
+unictype/base
+
+configure.ac:
+gl_LIBUNISTRING_MODULE([0.9.4], [unictype/combining-class-name])
+
+Makefile.am:
+if LIBUNISTRING_COMPILE_UNICTYPE_COMBINING_CLASS_NAME
+lib_SOURCES += unictype/combiningclass_name.c
+endif
+
+Include:
+"unictype.h"
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible