diff options
Diffstat (limited to 'rdr/NullOutStream.cxx')
-rw-r--r-- | rdr/NullOutStream.cxx | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/rdr/NullOutStream.cxx b/rdr/NullOutStream.cxx new file mode 100644 index 0000000..aae999d --- /dev/null +++ b/rdr/NullOutStream.cxx @@ -0,0 +1,60 @@ +// +// 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. + +#include <rdr/NullOutStream.h> +#include <rdr/Exception.h> + +using namespace rdr; + +static const int bufferSize = 1024; + +NullOutStream::NullOutStream() + : offset(0) +{ + start = ptr = new U8[bufferSize]; + end = start + bufferSize; +} + +NullOutStream::~NullOutStream() +{ + delete [] start; +} + +int NullOutStream::length() +{ + return offset + ptr - start; +} + +void NullOutStream::writeBytes(const void* data, int length) +{ + offset += length; +} + +int NullOutStream::overrun(int itemSize, int nItems) +{ + if (itemSize > bufferSize) + throw Exception("NullOutStream overrun: max itemSize exceeded"); + + offset += ptr - start; + ptr = start; + + if (itemSize * nItems > end - ptr) + nItems = (end - ptr) / itemSize; + + return nItems; +} |