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panda/src/express/subStream.h

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// Filename: subStream.h
// Created by:  drose (02Aug02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef SUBSTREAM_H
#define SUBSTREAM_H

#include "pandabase.h"
#include "subStreamBuf.h"

////////////////////////////////////////////////////////////////////
//       Class : ISubStream
// Description : An istream object that presents a subwindow into
//               another istream.  The first character read from this
//               stream will be the "start" character from the source
//               istream; just before the file pointer reaches the
//               "end" character, eof is returned.
//
//               The source stream must be one that we can randomly
//               seek within.  The resulting ISubStream will also
//               support arbitrary seeks.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDAEXPRESS ISubStream : public istream {
public:
  INLINE ISubStream();
  INLINE ISubStream(istream *source, streampos start, streampos end);

  INLINE ISubStream &open(istream *source, streampos start, streampos end);
  INLINE ISubStream &close();

private:
  SubStreamBuf _buf;
};

#include "subStream.I"

#endif

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