Program Listing for File IfcCharacterDecoder.h

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/********************************************************************************
*                                                                              *
* This file is part of IfcOpenShell.                                           *
*                                                                              *
* IfcOpenShell is free software: you can redistribute it and/or modify         *
* it under the terms of the Lesser GNU General Public License as published by  *
* the Free Software Foundation, either version 3.0 of the License, or          *
* (at your option) any later version.                                          *
*                                                                              *
* IfcOpenShell 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                 *
* Lesser GNU General Public License for more details.                          *
*                                                                              *
* You should have received a copy of the Lesser GNU General Public License     *
* along with this program. If not, see <http://www.gnu.org/licenses/>.         *
*                                                                              *
********************************************************************************/

/********************************************************************************
*                                                                               *
* Implementation of character decoding as described in ISO 10303-21 table 2 and *
* table 4                                                                       *
*                                                                               *
********************************************************************************/

#ifndef IFCCHARACTERDECODER_H
#define IFCCHARACTERDECODER_H

#include <string>
#include <sstream>

#include "../ifcparse/IfcSpfStream.h"

namespace IfcUtil {
    std::wstring::value_type convert_codepage(int codepage, int c);
    std::string convert_utf8(const std::wstring& s);
    std::wstring convert_utf8(const std::string& s);
}

namespace IfcParse {

    class IFC_PARSE_API IfcCharacterDecoder {
    private:
        IfcParse::IfcSpfStream* file;
        int codepage_;
    public:
        enum ConversionMode {SUBSTITUTE, UTF8, ESCAPE};
        static ConversionMode mode;
        static char substitution_character;
        IfcCharacterDecoder(IfcParse::IfcSpfStream* file);
        ~IfcCharacterDecoder();
        // Only advances the underlying token stream read pointer
        // to the next token.
        void skip();
        // Gets a decoded string representation at the token stream
        // read pointer and advances the underlying token stream.
        operator std::string();
        // Gets a decoded string representation at the offset provided,
        // does not mutate the underlying token stream read pointer.
        std::string get(unsigned int&);
    };

}

namespace IfcWrite {

    class IFC_PARSE_API IfcCharacterEncoder {
    private:
        std::wstring str;
    public:
        IfcCharacterEncoder(const std::string& input);
        operator std::string();
    };

}

#endif