codepages.h

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/*
  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - <http://www.fabgl.com>
  Copyright (c) 2019-2022 Fabrizio Di Vittorio.
  All rights reserved.
 
 
* Please contact fdivitto2013@gmail.com if you need a commercial license.
 
 
* This library and related software is available under GPL v3.
 
  FabGL 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 3 of the License, or
  (at your option) any later version.
 
  FabGL 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 FabGL.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
 
#pragma once
 
 
#include "fabutils.h"
 
 
namespace fabgl {
 
 
 
// associates virtual key to ASCII code
struct VirtualKeyToASCII {
  VirtualKey vk;
  uint8_t    ASCII;
};
 
 
struct CodePage {
  uint16_t                  codepage;
  const VirtualKeyToASCII * convTable;  // last item has vk = VK_NONE (ending marker)
};
 
 
extern const CodePage CodePage437;
extern const CodePage CodePage1252;
 
 
struct CodePages {
  static int count() { return 2; }
  static CodePage const * get(uint16_t codepage, CodePage const * defaultValue = &CodePage437) {
    static const CodePage * codepages[] = { &CodePage437, &CodePage1252 };
    for (int i = 0; i < sizeof(CodePage) / sizeof(CodePage*); ++i)
      if (codepages[i]->codepage == codepage)
        return codepages[i];
    return defaultValue;
  }
};
 
 
 
int virtualKeyToASCII(VirtualKeyItem const & item, CodePage const * codepage);
 
 
 
} // fabgl namespace