private static void ExampleCompression()
{
string file = Path.GetTempFileName();
try
{
// Write file data
using (FileStream fs = File.OpenWrite(file))
{
byte[] data = Encoding.ASCII.GetBytes("The white bunny jumps over the brown dog in a carparking lot");
for (int i = 0; i < 20000; i++)
{
fs.Write(data, 0, data.Length);
}
}
Console.WriteLine(@"## Exmaple with {0} ##", file);
SafeFileHandle fileHandle = CreateFile(file, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, FileAttributes.Normal, IntPtr.Zero);
if (fileHandle.IsInvalid)
{
int lastError = Marshal.GetLastWin32Error();
Console.WriteLine(@"!! Invalid {0}; Error ({1}): {2}", file, lastError, new Win32Exception(lastError).Message);
Console.WriteLine();
return;
}
using (FilesystemDeviceWrapper fileIo = new FilesystemDeviceWrapper(fileHandle, true))
{
FileInfo fileInfo = new FileInfo(file);
Console.WriteLine("File size: {0:N0} (compressed: {1:N0})", fileInfo.Length, GetCompressedSize(file));
Console.WriteLine("Compression: {0} ({1})", fileInfo.Attributes.HasFlag(FileAttributes.Compressed), fileIo.FileSystemGetCompression());
Console.WriteLine(" Enabling compression (LZNT1)");
fileIo.FileSystemSetCompression(COMPRESSION_FORMAT.LZNT1);
fileInfo.Refresh();
Console.WriteLine("File size: {0:N0} (compressed: {1:N0})", fileInfo.Length, GetCompressedSize(file));
Console.WriteLine("Compression: {0} ({1})", fileInfo.Attributes.HasFlag(FileAttributes.Compressed), fileIo.FileSystemGetCompression());
}
}
finally
{
if (File.Exists(file))
{
File.Delete(file);
}
}
}
public void CompressedFile()
{
using (TempFile tmpFile = new TempFile())
{
// Create a file
// Write file data
using (FileStream fs = File.OpenWrite(tmpFile.File.FullName))
{
byte[] data = Encoding.ASCII.GetBytes("The white bunny jumps over the brown dog in a carparking lot");
for (int i = 0; i < 20000; i++)
{
fs.Write(data, 0, data.Length);
}
}
using (FilesystemDeviceWrapper wrapper = Win32.GetFileWrapper(tmpFile.File.FullName))
{
wrapper.FileSystemSetCompression(COMPRESSION_FORMAT.LZNT1);
}
// Discover it via the NTFS lib
char driveLetter = tmpFile.File.FullName[0];
RawDisk disk = new RawDisk(driveLetter);
NTFSDiskProvider provider = new NTFSDiskProvider(disk);
NTFSWrapper ntfsWrapper = new NTFSWrapper(provider, 0);
NtfsDirectory ntfsDir = NTFSHelpers.OpenDir(ntfsWrapper, tmpFile.File.DirectoryName);
NtfsFile ntfsFile = NTFSHelpers.OpenFile(ntfsDir, tmpFile.File.Name);
Assert.IsNotNull(ntfsFile);
Assert.IsTrue(tmpFile.File.Attributes.HasFlag(FileAttributes.Compressed));
AttributeData attributeData = ntfsFile.MFTRecord.Attributes.OfType <AttributeData>().Single();
Assert.IsTrue(attributeData.DataFragments.Any(s => s.IsCompressed));
// Read it
using (Stream actualStream = File.OpenRead(tmpFile.File.FullName))
using (Stream ntfsStream = ntfsFile.OpenRead())
{
bool equal = StreamUtils.CompareStreams(actualStream, ntfsStream);
Assert.IsTrue(equal);
}
}
}
private static void ExampleCompression()
{
string file = Path.GetTempFileName();
try
{
// Write file data
using (FileStream fs = File.OpenWrite(file))
{
byte[] data = Encoding.ASCII.GetBytes("The white bunny jumps over the brown dog in a carparking lot");
for (int i = 0; i < 20000; i++)
{
fs.Write(data, 0, data.Length);
}
}
Console.WriteLine(@"## Exmaple with {0} ##", file);
SafeFileHandle fileHandle = CreateFile(file, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, FileAttributes.Normal, IntPtr.Zero);
if (fileHandle.IsInvalid)
{
int lastError = Marshal.GetLastWin32Error();
Console.WriteLine(@"!! Invalid {0}; Error ({1}): {2}", file, lastError, new Win32Exception(lastError).Message);
Console.WriteLine();
return;
}
using (FilesystemDeviceWrapper fileIo = new FilesystemDeviceWrapper(fileHandle, true))
{
FileInfo fileInfo = new FileInfo(file);
Console.WriteLine("File size: {0:N0} (compressed: {1:N0})", fileInfo.Length, GetCompressedSize(file));
Console.WriteLine("Compression: {0} ({1})", fileInfo.Attributes.HasFlag(FileAttributes.Compressed), fileIo.FileSystemGetCompression());
Console.WriteLine(" Enabling compression (LZNT1)");
fileIo.FileSystemSetCompression(COMPRESSION_FORMAT.LZNT1);
fileInfo.Refresh();
Console.WriteLine("File size: {0:N0} (compressed: {1:N0})", fileInfo.Length, GetCompressedSize(file));
Console.WriteLine("Compression: {0} ({1})", fileInfo.Attributes.HasFlag(FileAttributes.Compressed), fileIo.FileSystemGetCompression());
}
}
finally
{
if (File.Exists(file))
File.Delete(file);
}
}