public override void Reader(string source, ref SynchronizedQueue <Chunk> readerQueue)
{
try
{
using (BinaryReader br = new BinaryReader(new FileStream(source, FileMode.Open, FileAccess.Read, FileShare.None)))
{
_blockCount = br.ReadInt64();
for (int count = 0; count < _blockCount; count++)
{
int blockNumber = br.ReadInt32();
int blockLength = br.ReadInt32();
byte[] blockValue = br.ReadBytes(blockLength);
if (blockValue == null)
{
throw new ArgumentNullException("Error read compressing file");
}
Chunk readerChunk = new Chunk(blockNumber, blockValue);
if (!readerQueue.TryEnqueue(readerChunk))
{
return;
}
}
}
}
catch (Exception e)
{
OnCancel();
OnError();
Console.WriteLine(e.Message);
return;
}
}
public override void Writer(string sink, ref SynchronizedQueue <Chunk> writerQueue)
{
int counter = 0;
int blockNumber = -1;
byte[] blockValue = null;
try
{
using (BinaryWriter bw = new BinaryWriter(new FileStream(sink, FileMode.Create, FileAccess.Write, FileShare.None)))
{
bw.Write(BitConverter.GetBytes(_blockCount));
while (true)
{
Chunk writerChunk = new Chunk(blockNumber, blockValue);
if (!writerQueue.TryDequeue(out writerChunk))
{
return;
}
if (writerChunk.Data == null)
{
break;
}
try
{
bw.Write(BitConverter.GetBytes(writerChunk.Id));
bw.Write(writerChunk.Data.Length);
bw.Write(writerChunk.Data);
}
catch (IOException)
{
OnCancel();
OnError();
Console.WriteLine("Error write compressing file");
bw.Close();
File.Delete(sink);
return;
}
counter++;
if (counter == _blockCount)
{
OnCancel();
}
}
}
}
catch (Exception)
{
OnCancel();
OnError();
Console.WriteLine("Error write compressing file");
}
}
public override void Writer(string sink, ref SynchronizedQueue <Chunk> writerQueue)
{
int cnt = 0;
int blockNumber = -1;
byte[] blockValue = null;
Dictionary <int, byte[]> buffer = new Dictionary <int, byte[]>();
try
{
using (BinaryWriter bw = new BinaryWriter(new FileStream(sink, FileMode.Create, FileAccess.Write, FileShare.None)))
{
while (true)
{
Chunk writerChunk = new Chunk(blockNumber, blockValue);
if (!writerQueue.TryDequeue(out writerChunk))
{
return;
}
if (writerChunk.Data == null)
{
break;
}
buffer[writerChunk.Id] = writerChunk.Data;
while (buffer.ContainsKey(cnt))
{
bw.Write(buffer[cnt]);
buffer.Remove(cnt);
cnt++;
if (cnt == _blockCount)
{
OnCancel();
return;
}
}
}
}
}
catch (Exception)
{
OnCancel();
OnError();
Console.WriteLine("Error write decompressing file");
}
}
public override void Reader(string source, ref SynchronizedQueue <Chunk> readerQueue)
{
try
{
FileInfo fi = new FileInfo(source);
_blockCount = fi.Length / GZip.BUFFER_SIZE;
if (fi.Length % GZip.BUFFER_SIZE > 0)
{
_blockCount++;
}
}
catch (Exception)
{
OnCancel();
OnError();
Console.WriteLine("Error read file");
return;
}
try
{
using (BinaryReader br = new BinaryReader(new FileStream(source, FileMode.Open, FileAccess.Read, FileShare.None)))
{
for (int blockNumber = 0; blockNumber < _blockCount; blockNumber++)
{
byte[] blockValue = br.ReadBytes(GZip.BUFFER_SIZE);
if (blockValue == null)
{
throw new ArgumentNullException("Error read file");
}
Chunk readerChunk = new Chunk(blockNumber, blockValue);
if (!readerQueue.TryEnqueue(readerChunk))
{
return;
}
}
}
}
catch (Exception e)
{
OnCancel();
OnError();
Console.WriteLine(e.Message);
return;
}
}
public override void Process(ref SynchronizedQueue <Chunk> readerQueue, ref SynchronizedQueue <Chunk> writerQueue)
{
int blockNumber = -1;
byte[] blockValue = null;
while (true)
{
try
{
Chunk readerChunk = new Chunk(blockNumber, blockValue);
if (!readerQueue.TryDequeue(out readerChunk))
{
return;
}
if (readerChunk.Data == null)
{
break;
}
byte[] blockData = Operation(readerChunk.Data);
Chunk writerChunk = new Chunk(readerChunk.Id, blockData);
if (!writerQueue.TryEnqueue(writerChunk))
{
return;
}
}
catch (Exception)
{
Cancel();
Error();
Console.WriteLine("Error compressing");
return;
}
}
}
