117 lines
4.3 KiB
C++
117 lines
4.3 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2023
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
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* street, Riga, Latvia, EU, LV-1050.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#pragma once
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#ifndef UTILITY_CODECVT_INCLUDE_H_
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#define UTILITY_CODECVT_INCLUDE_H_
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/** Several code conversions facets.
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E.g. this is how to convert UCS-2 to UTF-8
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@code
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wifstream ifs("input", ios_base::binary);
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wofstream ofs("output", ios_base::binary);
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ifs.rdbuf()->pubimbue(locale(locale(), new ucs2_conversion()));
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ofs.rbbuf()->pubimbue(locale(locale(), new utf8_conversion()));
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ofs << ifs.rdbuf();
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@endcode
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@author Vladimir Prus <ghost@cs.msu.su>
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@file
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*/
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#include <locale>
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/** Conversion facet that allows to use Unicode files in UCS-2 encoding */
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class ucs2_conversion : public std::codecvt<wchar_t, char, std::mbstate_t>
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{
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protected:
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result do_in(std::mbstate_t& state,
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const char* from, const char* from_end, const char*& from_next,
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wchar_t* to, wchar_t* to_limit, wchar_t*& to_next) const;
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result do_out(std::mbstate_t& state,
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const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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char* to, char* to_limit, char*& to_next) const;
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bool do_always_noconv() const throw() { return false; }
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int do_encoding() const throw() { return 2; }
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};
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class ube_conversion : public std::codecvt<wchar_t, char, std::mbstate_t>
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{
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protected:
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result do_in(std::mbstate_t& state,
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const char* from, const char* from_end, const char*& from_next,
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wchar_t* to, wchar_t* to_limit, wchar_t*& to_next) const;
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result do_out(std::mbstate_t& state,
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const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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char* to, char* to_limit, char*& to_next) const;
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bool do_always_noconv() const throw() { return false; }
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int do_encoding() const throw() { return 2; }
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};
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/** Conversion facet that allows to read Unicode files in UTF-8 encoding */
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class utf8_conversion : public std::codecvt<wchar_t, char, std::mbstate_t>
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{
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protected:
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result do_in(std::mbstate_t& state,
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const char* from, const char* from_end, const char*& from_next,
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wchar_t* to, wchar_t* to_limit, wchar_t*& to_next) const;
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result in(std::mbstate_t& state,
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const char* from, const char* from_end, const char*& from_next,
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wchar_t* to, wchar_t* to_limit, wchar_t*& to_next) const;
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result do_out(std::mbstate_t& state,
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const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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char* to, char* to_limit, char*& to_next) const;
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result out(std::mbstate_t& state,
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const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next,
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char* to, char* to_limit, char*& to_next) const;
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bool do_always_noconv() const throw() { return false; }
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int do_encoding() const throw() { return 2; }
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private:
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const unsigned char take_6_bits(const unsigned int value, const size_t right_position) const;
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const size_t most_signifant_bit_position(const unsigned int value) const;
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};
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#endif // UTILITY_CODECVT_INCLUDE_H_
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