utf8_reader.h

/*
**  UICore
**  Copyright (c) 1997-2015 The UICore Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries UICore may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**   Mark Page
*/

#pragma once

#include <memory>

namespace uicore
{
    class UTF8_Reader_Impl;

    class UTF8_Reader
    {
    public:
        UTF8_Reader(const std::string::value_type *text, std::string::size_type length);

        bool is_end();

        unsigned int character();

        std::string::size_type char_length();

        void prev();

        void next();

        void move_to_leadbyte();

        std::string::size_type position();

        void set_position(std::string::size_type position);

    private:
        std::string::size_type current_position = 0;
        std::string::size_type length = 0;
        const unsigned char *data = nullptr;
    };
}