protected override void ProcessDataBuffer(FileBlock fileBlockToProcess, FileBlock freeFileBlock)
{
using (var memoryStream = new MemoryStream(fileBlockToProcess.Buffer, 0, fileBlockToProcess.BufferSize))
{
using (var gZipStream = new GZipStream(memoryStream, CompressionMode.Decompress, true))
{
freeFileBlock.BufferSize = gZipStream.Read(freeFileBlock.Buffer, 0, GZipConstants.BufferSize);
}
}
}
protected override void ProcessDataBuffer(FileBlock fileBlockToProcess, FileBlock freeFileBlock)
{
using (var memoryStream = new MemoryStream(freeFileBlock.Buffer, 0, GZipConstants.MaxCompressedBufferSize))
{
using (var gZipStream = new GZipStream(memoryStream, CompressionMode.Compress, true))
{
gZipStream.Write(fileBlockToProcess.Buffer, 0, fileBlockToProcess.BufferSize);
}
freeFileBlock.BufferSize = (int)memoryStream.Position;
}
}
protected static FileBlock[] CreateBlocks(int blockSize, int blockCount)
{
if (blockSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(blockSize));
}
if (blockCount <= 0)
{
throw new ArgumentOutOfRangeException(nameof(blockCount));
}
var blocks = new FileBlock[blockCount];
for (int i = 0; i < blockCount; i++)
{
blocks[i] = new FileBlock(new byte[blockSize]);
}
return(blocks);
}
protected override int ReadSourceFile(FileStream fileStream, FileBlock freeFileBlock)
{
int bytesRead;
if ((bytesRead = fileStream.Read(_blockSizeBuffer, 0, GZipConstants.BlockSizeSize)) < GZipConstants.BlockSizeSize)
{
if (bytesRead == 0)
{
return(0);
}
throw new FileFormatException(_badArchiveMessage);
}
freeFileBlock.BufferSize = BitConverter.ToInt32(_blockSizeBuffer, 0);
if (fileStream.Read(freeFileBlock.Buffer, 0, freeFileBlock.BufferSize) < freeFileBlock.BufferSize)
{
throw new FileFormatException(_badArchiveMessage);
}
return(freeFileBlock.BufferSize);
}
protected abstract void WriteDestinationFile(FileStream fileStream, FileBlock fileBlockToWrite);
protected abstract int ReadSourceFile(FileStream fileStream, FileBlock freeFileBlock);
protected abstract void ProcessDataBuffer(FileBlock fileBlockToProcess, FileBlock freeFileBlock);
protected override void WriteDestinationFile(FileStream fileStream, FileBlock fileBlockToWrite)
{
fileStream.Write(fileBlockToWrite.Buffer, 0, fileBlockToWrite.BufferSize);
}
protected override void WriteDestinationFile(FileStream fileStream, FileBlock fileBlockToWrite)
{
fileStream.Write(BitConverter.GetBytes(fileBlockToWrite.BufferSize), 0, GZipConstants.BlockSizeSize);
fileStream.Write(fileBlockToWrite.Buffer, 0, fileBlockToWrite.BufferSize);
}
protected override int ReadSourceFile(FileStream fileStream, FileBlock freeFileBlock)
{
freeFileBlock.BufferSize = fileStream.Read(freeFileBlock.Buffer, 0, GZipConstants.BufferSize);
return(freeFileBlock.BufferSize);
}
