public void PutAllCompressedFilesTogether()
{
var previousBuffer = new Dictionary <int, int>();
for (int i = 0; i < _partsCount; i++)
{
Console.Write(".");
long offset = i * (long)_compressBufferSize;
var file = Archiver.FormNewFileName(_targetCompressedFile, offset);
using (FileStream nextFile = new FileStream(file, FileMode.Open))
{
var bufferMessage = new byte[nextFile.Length];
nextFile.Read(bufferMessage, 0, bufferMessage.Length);
previousBuffer.Add(i, bufferMessage.Length);
using (FileStream targetStream = new FileStream(_targetCompressedFile, FileMode.OpenOrCreate))
{
var localOffset = CountAllPreviouslyOffset(previousBuffer, i);
targetStream.Seek(localOffset, SeekOrigin.Begin);
targetStream.Write(bufferMessage, 0, bufferMessage.Length);
}
}
File.Delete(file);
}
}
public void Compressing()
{
try
{
Console.Write(".");
using (var sourceStream =
new FileStream(_sourceFile, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Read))
{
var newFile = Archiver.FormNewFileName(_targetCompressedFile, _offset);
using (var targetStream =
new FileStream(newFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write))
{
sourceStream.Seek(_offset, SeekOrigin.Begin);
var remainingLength = sourceStream.Length - _offset;
var bufferMessage = remainingLength < _compressBufferSize
? new byte[remainingLength]
: new byte[_compressBufferSize];
sourceStream.Read(bufferMessage, 0, bufferMessage.Length);
using (var memoryStream = new MemoryStream())
{
using (var compressionStream = new GZipStream(memoryStream, CompressionMode.Compress))
{
compressionStream.Write(bufferMessage, 0, bufferMessage.Length);
}
var compressedBlock = memoryStream.ToArray();
AddMetaDataToBlock(ref compressedBlock);
targetStream.Write(compressedBlock, 0, compressedBlock.Length);
}
}
}
}
catch (IOException e)
{
if (Validator.IsDiskFull(e))
{
Console.WriteLine(
"Not enought disk space where your source file located. Please, free up some memory on this disk.");
Console.WriteLine("App completed with code 0");
Environment.Exit(0);
}
}
catch (OutOfMemoryException)
{
Console.WriteLine("Lack of RAM. Please, close other application and try again.");
Console.WriteLine("App completed with code 0");
Environment.Exit(0);
}
catch (UnauthorizedAccessException)
{
Console.WriteLine($"App hasn't acces to file {_sourceFile} or {_targetCompressedFile}");
Console.WriteLine("App completed with code 0");
Environment.Exit(0);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine("App completed with code 0");
Environment.Exit(0);
}
}
