Unicode.h

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/*
 * Deskflow -- mouse and keyboard sharing utility
 * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
 * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
 * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
 */
 
#pragma once
 
#include <cstdint>
#include <string>


class Unicode
{
public:



  static bool isUTF8(const std::string &);


  static std::string UTF8ToUCS2(const std::string &, bool *errors = nullptr);


  static std::string UTF8ToUCS4(const std::string &, bool *errors = nullptr);


  static std::string UTF8ToUTF16(const std::string &, bool *errors = nullptr);


  static std::string UTF8ToUTF32(const std::string &, bool *errors = nullptr);


  static std::string UCS2ToUTF8(const std::string_view &, bool *errors = nullptr);


  static std::string UCS4ToUTF8(const std::string_view &, bool *errors = nullptr);


  static std::string UTF16ToUTF8(const std::string_view &, bool *errors = nullptr);


  static std::string UTF32ToUTF8(const std::string_view &, bool *errors = nullptr);

 
private:
  // internal conversion to UTF8
  static std::string doUCS2ToUTF8(const uint8_t *src, uint32_t n, bool *errors);
  static std::string doUCS4ToUTF8(const uint8_t *src, uint32_t n, bool *errors);
  static std::string doUTF16ToUTF8(const uint8_t *src, uint32_t n, bool *errors);
  static std::string doUTF32ToUTF8(const uint8_t *src, uint32_t n, bool *errors);
 
  // convert characters to/from UTF8
  static uint32_t fromUTF8(const uint8_t *&src, uint32_t &size);
  static void toUTF8(std::string &dst, uint32_t c, bool *errors);
 
private:
  static uint32_t s_invalid;
  static uint32_t s_replacement;
};