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76ee07f61c
Co-authored-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com> Co-committed-by: Alexander Trofimov <alexander.trofimov@onlyoffice.com>
120 lines
4.3 KiB
C++
120 lines
4.3 KiB
C++
/*
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* Copyright (C) Ascensio System SIA, 2009-2026
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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, together with the
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* additional terms provided in the LICENSE file.
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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: https://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA by email at info@onlyoffice.com
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* or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
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* LV-1050, Latvia, European Union.
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*
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* The interactive user interfaces in modified versions of the Program
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* are required to display Appropriate Legal Notices in accordance with
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* Section 5 of the GNU AGPL version 3.
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*
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* No trademark rights are granted under this License.
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*
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* All non-code elements of the Product, including illustrations,
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* icon sets, and technical writing content, are licensed under the
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* Creative Commons Attribution-ShareAlike 4.0 International License:
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* https://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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* This license applies only to such non-code elements and does not
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* modify or replace the licensing terms applicable to the Program's
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* source code, which remains licensed under the GNU Affero General
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* Public License v3.
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*
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* SPDX-License-Identifier: AGPL-3.0-only
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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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