--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xkeysymtounicodetablegen.rb	Thu May 25 09:42:28 2017 +0100
@@ -0,0 +1,157 @@
+#!/usr/bin/env ruby
+# 
+#  Copyright (c) 2017-now Jan Vrany
+#  
+#  Permission is hereby granted, free of charge, to any person obtaining
+#  a copy of this software and associated documentation files (the
+#  "Software"), to deal in the Software without restriction, including
+#  without limitation the rights to use, copy, modify, merge, publish,
+#  distribute, sublicense, and/or sell copies of the Software, and to
+#  permit persons to whom the Software is furnished to do so, subject to
+#  the following conditions:
+#  
+#  The above copyright notice and this permission notice shall be
+#  included in all copies or substantial portions of the Software.
+#  
+#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+#  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+#  MeERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+#  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+#  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+#  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+#  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+#
+# A quick and dirty generator of character lookup table used
+# by XKeysymToUnicode(). 
+#
+# Usage: 
+#
+#   ruby xkeysymtounicodetablegen.rb > xkeysymtounicodetable.h
+#
+
+KEYSYMDEF_H = '/usr/include/X11/keysymdef.h'
+KEYSYMDEF_MATCHER = /^#define (XK_[A-Za-z_]+)+\ +0x([0-9A-Fa-f]+)  \/\* U\+([0-9A-Fa-f]+) (.+) \*\/$/
+KEYSYM_DIRECT_LOW_NAME = "XK_space"
+
+keysyms = []
+keysym_direct_low = nil
+keysym_direct_high = nil
+
+class KeySym
+  attr_accessor :x_code, :x_name, :u_code, :u_name
+
+  def initialize(xcode, xname, ucode, uname) 
+    @x_code = xcode
+    @x_name = xname
+    @u_code = ucode
+    @u_name = uname
+  end
+
+  def to_s
+    return "#define #{x_name} 0x#{x_code.to_s(16)} /* U+#{u_code.to_s(16)} #{u_name} */"
+  end
+end
+
+File.open(KEYSYMDEF_H).each do | line |
+  m = line.match(KEYSYMDEF_MATCHER)
+  if m then
+    x_name, x_code, u_code, u_name = m.captures
+    keysym = KeySym.new(x_code.to_i(16), x_name, u_code.to_i(16), u_name)    
+    if keysym.x_code != 0 then
+      keysyms << keysym
+      if keysym.x_name == KEYSYM_DIRECT_LOW_NAME then
+        keysym_direct_low = keysym
+        keysym_direct_high = keysym
+      end
+    end
+  end
+end
+
+keysyms.sort! { | a, b | a.x_code <=> b.x_code }
+
+begin
+  i = keysyms.index(keysym_direct_low) + 1
+  while (true)
+    keysym = keysyms[i]
+    i = i + 1
+
+    if (keysym.x_code == keysym.u_code && keysym.x_code >= keysym_direct_high.x_code) then
+      keysym_direct_high = keysym      
+    else
+      break
+    end
+  end
+end
+
+print <<-end
+/* 
+ * Automatically generated - do not edit! 
+ */
+
+/* 
+ * Copyright (c) 2017-now Jan Vrany
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MeERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* 
+ * This header contain table definitions for XKeysymToUnicode() function. 
+ *
+ * Automatically generated by `xkeysymtounicodetablegen.rb` from `keysymdef.h`.
+ */
+
+#ifndef _XKEYSYMTOUNICODETABLE_H_
+#define _XKEYSYMTOUNICODETABLE_H_
+
+#include <stdint.h>
+#include <X11/X.h>
+#include <X11/keysym.h>
+
+#define XKEYSYMTOUNICODE_DIRECT_LO 0x#{keysym_direct_low.x_code.to_s(16)} /* #{keysym_direct_low.x_name}, #{keysym_direct_low.u_name} */
+#define XKEYSYMTOUNICODE_DIRECT_HI 0x#{keysym_direct_high.x_code.to_s(16)} /* #{keysym_direct_high.x_name}, #{keysym_direct_high.u_name} */
+
+typedef struct _xkeysymtounicode_table_entry {
+  KeySym keysym;
+  uint16_t codepoint;
+} xkeysymtounicode_table_entry_t;
+
+static const xkeysymtounicode_table_entry_t 
+xkeysymtounicode_table[] = {
+end
+
+keysyms_size = 0
+keysyms.each do | keysym | 
+  if keysym.x_code < keysym_direct_low.x_code || keysym.x_code > keysym_direct_high.x_code
+    keysyms_size = keysyms_size + 1 
+    print "    { 0x#{keysym.x_code.to_s(16)}, 0x#{keysym.u_code.to_s(16)} }, /* #{keysym.x_name}, #{keysym.u_name} */\n"
+  end
+end
+print "    { 0, 0 } /* -- terminator -- */\n"
+print "};\n"
+
+print <<-end
+
+static const int 
+xkeysymtounicode_table_size = #{keysyms_size};
+
+#endif // _XKEYSYMTOUNICODETABLE_H_
+end
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