Initial revision

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519

1 files changed, 60 insertions, 0 deletions

diff --git a/rdr/NullOutStream.cxx b/rdr/NullOutStream.cxx
new file mode 100644
index 00000000..e940f2af
--- /dev/null
+++ b/rdr/NullOutStream.cxx
@@ -0,0 +1,60 @@
+/* Copyright (C) 2002-2003 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;
+}