BufferedInStream.h

/*
 *  BufferedInStream class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2008, IRIT UPS.
 * 
 *  OTAWA 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  OTAWA 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 OTAWA; if not, write to the Free Software 
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef ELM_BUFFEREDINSTREAM_H_
#define ELM_BUFFEREDINSTREAM_H_
 
#include <elm/io.h>
#include <elm/io/InStream.h>
 
namespace elm { namespace io {
 
// BufferedInStream class
class BufferedInStream: public InStream {
public:
    static const int default_size = 4096;
    
    BufferedInStream(InStream& input, int size = default_size);
    BufferedInStream(InStream *input, bool close = false, int size = default_size);
    ~BufferedInStream() override;
 
    inline InStream& stream() const { return *in; }
    void setStream(InStream& str);
    void reset();
 
    int read(void *buffer, int size) override;
    int read(void) override;
 
private:
    int refill();
    InStream *in;
    char *buf;
    int pos, top, buf_size;
    bool _close;
};
 
} } // elm::io
 
#endif /* ELM_BUFFEREDINSTREAM_H_ */