1 files changed, 162 insertions, 0 deletions
diff --git a/nxcomp/SequenceQueue.cpp b/nxcomp/SequenceQueue.cpp
new file mode 100755
index 000000000..b8e7d234e
--- /dev/null
+++ b/nxcomp/SequenceQueue.cpp
@@ -0,0 +1,162 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 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 NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include "SequenceQueue.h"
+
+static const unsigned int INITIAL_SIZE_    = 16;
+static const unsigned int GROWTH_INCREMENT = 16;
+
+SequenceQueue::SequenceQueue()
+
+  : queue_(new RequestSequence[INITIAL_SIZE_]), size_(INITIAL_SIZE_),
+        length_(0), start_(0), end_(0)
+{
+}
+
+SequenceQueue::~SequenceQueue()
+{
+  delete [] queue_;
+}
+
+void SequenceQueue::push(unsigned short int sequence, unsigned char opcode,
+                             unsigned int data1, unsigned int data2,
+                                 unsigned int data3)
+{
+  if (length_ == 0)
+  {
+    start_ = end_ = 0;
+
+    queue_[0].opcode   = opcode;
+    queue_[0].sequence = sequence;
+
+    queue_[0].data1 = data1;
+    queue_[0].data2 = data2;
+    queue_[0].data3 = data3;
+
+    length_ = 1;
+
+    return;
+  }
+
+  if (length_ == size_)
+  {
+    size_ += GROWTH_INCREMENT;
+
+    RequestSequence *newQueue = new RequestSequence[size_];
+
+    for (int i = start_; (unsigned int) i < length_; i++)
+    {
+      newQueue[i - start_] = queue_[i];
+    }
+
+    for (int i1 = 0; (unsigned int) i1 < start_; i1++)
+    {
+      newQueue[i1 + length_ - start_] = queue_[i1];
+    }
+
+    delete [] queue_;
+
+    queue_ = newQueue;
+
+    start_ = 0;
+
+    end_ = length_ - 1;
+  }
+
+  end_++;
+
+  if (end_ == size_)
+  {
+    end_ = 0;
+  }
+
+  queue_[end_].opcode   = opcode;
+  queue_[end_].sequence = sequence;
+
+  queue_[end_].data1 = data1;
+  queue_[end_].data2 = data2;
+  queue_[end_].data3 = data3;
+
+  length_++;
+}
+
+int SequenceQueue::peek(unsigned short int &sequence,
+                            unsigned char &opcode)
+{
+  if (length_ == 0)
+  {
+    return 0;
+  }
+  else
+  {
+    opcode   = queue_[start_].opcode;
+    sequence = queue_[start_].sequence;
+
+    return 1;
+  }
+}
+
+int SequenceQueue::peek(unsigned short int &sequence, unsigned char &opcode,
+                            unsigned int &data1, unsigned int &data2,
+                                unsigned int &data3)
+{
+  if (length_ == 0)
+  {
+    return 0;
+  }
+  else
+  {
+    opcode   = queue_[start_].opcode;
+    sequence = queue_[start_].sequence;
+
+    data1 = queue_[start_].data1;
+    data2 = queue_[start_].data2;
+    data3 = queue_[start_].data3;
+
+    return 1;
+  }
+}
+
+int SequenceQueue::pop(unsigned short int &sequence, unsigned char &opcode, 
+                           unsigned int &data1, unsigned int &data2,
+                               unsigned int &data3)
+{
+  if (length_ == 0)
+  {
+    return 0;
+  }
+  else
+  {
+    opcode   = queue_[start_].opcode;
+    sequence = queue_[start_].sequence;
+
+    data1 = queue_[start_].data1;
+    data2 = queue_[start_].data2;
+    data3 = queue_[start_].data3;
+
+    start_++;
+
+    if (start_ == size_)
+    {
+      start_ = 0;
+    }
+
+    length_--;
+
+    return 1;
+  }
+}