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Diffstat (limited to 'rdr/ZlibInStream.h')
-rw-r--r-- | rdr/ZlibInStream.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/rdr/ZlibInStream.h b/rdr/ZlibInStream.h new file mode 100644 index 0000000..14ad6f0 --- /dev/null +++ b/rdr/ZlibInStream.h @@ -0,0 +1,59 @@ +// +// Copyright (C) 2002 RealVNC Ltd. All Rights Reserved. +// +// This 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. +// +// This software 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 software; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// +// ZlibInStream streams from a compressed data stream ("underlying"), +// decompressing with zlib on the fly. +// + +#ifndef __RDR_ZLIBINSTREAM_H__ +#define __RDR_ZLIBINSTREAM_H__ + +#include <rdr/InStream.h> + +struct z_stream_s; + +namespace rdr { + + class ZlibInStream : public InStream { + + public: + + ZlibInStream(int bufSize=0); + virtual ~ZlibInStream(); + + void setUnderlying(InStream* is, int bytesIn); + void reset(); + int pos(); + + private: + + int overrun(int itemSize, int nItems); + void decompress(); + + InStream* underlying; + int bufSize; + int offset; + z_stream_s* zs; + int bytesIn; + U8* start; + }; + +} // end of namespace rdr + +#endif |