// * This file is part of the COLOBOT source code
// * Copyright (C) 2014 Polish Portal of Colobot (PPC)
// *
// * This program 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.
// *
// * This program 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 this program. If not, see  http://www.gnu.org/licenses/.

#pragma once

#include <streambuf>
#include <string>
#include <physfs.h>

class CInputStreamBuffer : public std::streambuf
{
public:
    CInputStreamBuffer(size_t buffer_size = 512);
    virtual ~CInputStreamBuffer();
    
    void open(const std::string &filename);
    void close();
    bool is_open();
    size_t size();

private:
    int_type underflow();

    std::streampos seekpos(std::streampos sp, std::ios_base::openmode which);
    std::streampos seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode which);

    // copy ctor and assignment not implemented;
    // copying not allowed
    CInputStreamBuffer(const CInputStreamBuffer &);
    CInputStreamBuffer &operator= (const CInputStreamBuffer &);
    
    PHYSFS_File *m_file;
    char *m_buffer;
    size_t m_buffer_size;
};