#!/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