Latin1Codec.h

/*
 * Copyright (C) 2020 by Marc Boris Duerner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

#ifndef PT_LATIN1CODEC_H
#define PT_LATIN1CODEC_H

#include <Pt/Api.h>
#include <Pt/TextCodec.h>

namespace Pt {

class PT_API Latin1Codec : public Pt::TextCodec<Pt::Char, char>
{
    public:
        explicit Latin1Codec(std::size_t ref = 0);

        virtual ~Latin1Codec();

        // inheritdoc
        virtual result do_in(Pt::MBState& s, 
                             const char* from, const char* fromEnd, const char*& fromNext,
                             Pt::Char* to, Pt::Char* toEnd, Pt::Char*& toNext) const;
        
        // inheritdoc
        virtual result do_out(Pt::MBState& s, const Pt::Char* fromBegin,
                              const Pt::Char* fromEnd, const Pt::Char*& fromNext,
                              char* toBegin, char* toEnd, char*& toNext) const;

        // inheritdoc
        virtual bool do_always_noconv() const throw()
        { return false; }

        // inheritdoc
        virtual int do_length(Pt::MBState& s, const char* fromBegin, 
                              const char* fromEnd, std::size_t max) const
        {
            std::size_t avail = fromEnd - fromBegin;
            return avail < max ? avail : max;
        }

        // inheritdoc
        virtual int do_max_length() const throw()
        { return 1; }

        // inheritdoc
        std::codecvt_base::result do_unshift(Pt::MBState&, char*, char*, char*&) const
        { return std::codecvt_base::noconv; }

        // inheritdoc
        int do_encoding() const throw()
        { return 1; }
};

} // namespace

#endif