Merge branch 'nxcomp'

1 files changed, 126 insertions, 0 deletions

diff --git a/nxcomp/WriteBuffer.h b/nxcomp/WriteBuffer.h
new file mode 100644
index 000000000..4673cecee
--- /dev/null
+++ b/nxcomp/WriteBuffer.h
@@ -0,0 +1,126 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMP, NX protocol compression and NX extensions to this software     */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of Medialogic S.p.A.                   */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef WriteBuffer_H
+#define WriteBuffer_H
+
+#include "Misc.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define WRITE_BUFFER_DEFAULT_SIZE         16384
+
+//
+// Adjust for the biggest reply that we could receive.
+// This is likely to be a reply to a X_ListFonts where
+// user has a large amount of installed fonts.
+//
+
+#define WRITE_BUFFER_OVERFLOW_SIZE        4194304
+
+class WriteBuffer
+{
+  public:
+
+  WriteBuffer();
+
+  ~WriteBuffer();
+
+  void setSize(unsigned int initialSize, unsigned int thresholdSize,
+                   unsigned int maximumSize);
+
+  unsigned char *addMessage(unsigned int numBytes);
+
+  unsigned char *removeMessage(unsigned int numBytes);
+
+  unsigned char *addScratchMessage(unsigned int numBytes);
+
+  //
+  // This form allows user to provide its own
+  // buffer as write buffer's scratch area.
+  //
+
+  unsigned char *addScratchMessage(unsigned char *newBuffer, unsigned int numBytes);
+
+  void removeScratchMessage();
+
+  void partialReset();
+
+  void fullReset();
+
+  unsigned char *getData() const
+  {
+    return buffer_;
+  }
+
+  unsigned int getLength() const
+  {
+    return length_;
+  }
+
+  unsigned int getAvailable() const
+  {
+    return (size_ - length_);
+  }
+
+  unsigned char *getScratchData() const
+  {
+    return scratchBuffer_;
+  }
+
+  unsigned int getScratchLength() const
+  {
+    return scratchLength_;
+  }
+
+  unsigned int getTotalLength() const
+  {
+    return (length_ + scratchLength_);
+  }
+
+  void registerPointer(unsigned char **pointer)
+  {
+    index_ = pointer;
+  }
+
+  void unregisterPointer()
+  {
+    index_ = 0;
+  }
+
+  private:
+
+  unsigned int size_;
+  unsigned int length_;
+
+  unsigned char *buffer_;
+  unsigned char **index_;
+
+  unsigned int  scratchLength_;
+  unsigned char *scratchBuffer_;
+
+  int scratchOwner_;
+
+  unsigned int initialSize_;
+  unsigned int thresholdSize_;
+  unsigned int maximumSize_;
+};
+
+#endif /* WriteBuffer_H */