// This file is part of w3c - wwwcam.

// w3c is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// w3c 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 General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with w3c. If not, see <http://www.gnu.org/licenses/>.
//
// (C) Copyright 2015 by Sebastian Büttner <sebastian.buettner@iem.thm.de>

#ifndef HELPER_BINARY_READER_H
#define HELPER_BINARY_READER_H

#include <cstring>
#include <type_traits>

namespace w3c {

class binary_reader {
public:
    binary_reader(const char *data);

    template<typename T>
    binary_reader& operator>>(T &value)
    {
        value = read<T>();
        return *this;
    }

    template<typename T>
    T read()
    {
    static_assert(std::is_arithmetic<T>::value || std::is_pod<T>::value,
                  "Only arithmetic types and pod can be read");

        T value;
        std::memcpy((void*)&value, m_ptr, sizeof(T));
        m_ptr += sizeof(T);
        return value;
    }

    void read(char *ptr, size_t size)
    {
        std::memcpy(ptr, m_ptr, size);
        m_ptr += size;
    }

private:
    const char *m_ptr;
};

}

#endif