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259f1055cb
Provides safety against them accidentally becoming negative because of bugs in the calculations. Also does the same to CharArray and friends as they were strongly connection to the stream objects.
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// rdr::MemInStream is an InStream which streams from a given memory buffer.
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// If the deleteWhenDone parameter is true then the buffer will be delete[]d in
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// the destructor. Note that it is delete[]d as a U8* - strictly speaking this
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// means it ought to be new[]ed as a U8* as well, but on most platforms this
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// doesn't matter.
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//
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#ifndef __RDR_MEMINSTREAM_H__
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#define __RDR_MEMINSTREAM_H__
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#include <rdr/InStream.h>
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#include <rdr/Exception.h>
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namespace rdr {
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class MemInStream : public InStream {
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public:
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MemInStream(const void* data, size_t len, bool deleteWhenDone_=false)
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: start((const U8*)data), deleteWhenDone(deleteWhenDone_)
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{
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ptr = start;
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end = start + len;
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}
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virtual ~MemInStream() {
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if (deleteWhenDone)
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delete [] start;
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}
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size_t pos() { return ptr - start; }
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void reposition(size_t pos) { ptr = start + pos; }
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private:
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size_t overrun(size_t itemSize, size_t nItems, bool wait) { throw EndOfStream(); }
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const U8* start;
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bool deleteWhenDone;
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};
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}
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#endif
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