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/**************************************************************************/
/* */
/* 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;
}
}
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