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/* Copyright (C) 2002-2005 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.
*/
//
// rdr::MemInStream is an InStream which streams from a given memory buffer.
// If the deleteWhenDone parameter is true then the buffer will be delete[]d in
// the destructor. Note that it is delete[]d as a uint8_t* - strictly speaking this
// means it ought to be new[]ed as a uint8_t* as well, but on most platforms this
// doesn't matter.
//
#ifndef __RDR_MEMINSTREAM_H__
#define __RDR_MEMINSTREAM_H__
#include <rdr/InStream.h>
#include <rdr/Exception.h>
namespace rdr {
class MemInStream : public InStream {
public:
MemInStream(const void* data, size_t len, bool deleteWhenDone_=false)
: start((const uint8_t*)data), deleteWhenDone(deleteWhenDone_)
{
ptr = start;
end = start + len;
#ifdef RFB_INSTREAM_CHECK
// MemInStream cannot add more data, so callers are assumed to already
// new the total size
avail();
#endif
}
virtual ~MemInStream() {
if (deleteWhenDone)
delete [] start;
}
size_t pos() { return ptr - start; }
void reposition(size_t pos) { ptr = start + pos; }
private:
bool overrun(size_t /*needed*/) { throw EndOfStream(); }
const uint8_t* start;
bool deleteWhenDone;
};
}
#endif
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