public static CompressResult Decompress([NotNull] Stream compressedFile, [NotNull] Stream outputFile, int bufferSize = 0x100000, Action <CompressResult> blockCallback = null)
{
long position;
if (compressedFile == null)
{
throw new ArgumentNullException(nameof(compressedFile));
}
if (outputFile == null)
{
throw new ArgumentNullException(nameof(outputFile));
}
byte[] buffer = new byte[bufferSize];
CompressResult result = new CompressResult();
try
{
position = compressedFile.Position;
}
catch (Exception)
{
position = -1L;
result.Bytes = -1L;
}
using (Lz4DecompressionStream stream = new Lz4DecompressionStream(compressedFile))
{
int num2;
while ((num2 = stream.Read(buffer, 0, buffer.Length)) > 0)
{
outputFile.Write(buffer, 0, num2);
result.CompressedBytes += num2;
if (position != -1L)
{
long num3 = compressedFile.Position;
result.Bytes += num3 - position;
position = num3;
}
if (blockCallback != null)
{
blockCallback(result);
}
}
}
return(result);
}
public void StreamCompression_FileStream_1Mb()
{
var filename = System.IO.Path.GetRandomFileName();
int currentSz = 0;
int sz = 0;
int maxSz = 1024 * 1024 * 10;
List <uint> hashes = new List <uint> (1024);
byte[] buffer;
try
{
// create file
using (var stream = new Lz4CompressionStream(new System.IO.FileStream(filename, System.IO.FileMode.Create), 1 << 18, Lz4Mode.HighCompression, true))
{
while (currentSz < maxSz)
{
buffer = GetStringsAsByte(1024);
stream.Write(buffer, 0, buffer.Length);
currentSz += buffer.Length;
// save hash
hashes.Add(SimpleHash(buffer));
}
}
// read
buffer = new byte[1024];
int ix = 0;
using (var stream = new Lz4DecompressionStream(new System.IO.FileStream(filename, System.IO.FileMode.Open), true))
{
while ((sz = stream.Read(buffer, 0, buffer.Length)) > 0)
{
// check hash
Assert.IsTrue(SimpleHash(buffer) == hashes[ix++], "Hash mismatch");
}
}
}
finally
{
System.IO.File.Delete(filename);
}
}
public void StreamCompression_SimpleTest()
{
var txt = sampleTxt + sampleTxt + sampleTxt + sampleTxt + sampleTxt + sampleTxt;
var mem = new System.IO.MemoryStream();
using (var stream = new Lz4CompressionStream(mem, 1 << 18, Lz4Mode.HighCompression))
{
var b = System.Text.Encoding.UTF8.GetBytes(txt);
stream.Write(b, 0, b.Length);
}
// reset stream position
mem.Position = 0;
using (var stream = new Lz4DecompressionStream(mem))
{
var b = new byte[1024];
int sz = stream.Read(b, 0, b.Length);
// validate
Assert.IsTrue(txt == System.Text.Encoding.UTF8.GetString(b, 0, sz));
}
}
public static CompressResult Decompress([NotNull] Stream compressedFile, [NotNull] Stream outputFile, int bufferSize = 0x100000, Action<CompressResult> blockCallback = null)
{
long position;
if (compressedFile == null)
{
throw new ArgumentNullException("compressedFile");
}
if (outputFile == null)
{
throw new ArgumentNullException("outputFile");
}
byte[] buffer = new byte[bufferSize];
CompressResult result = new CompressResult();
try
{
position = compressedFile.Position;
}
catch (Exception)
{
position = -1L;
result.Bytes = -1L;
}
using (Lz4DecompressionStream stream = new Lz4DecompressionStream(compressedFile))
{
int num2;
while ((num2 = stream.Read(buffer, 0, buffer.Length)) > 0)
{
outputFile.Write(buffer, 0, num2);
result.CompressedBytes += num2;
if (position != -1L)
{
long num3 = compressedFile.Position;
result.Bytes += num3 - position;
position = num3;
}
if (blockCallback != null)
{
blockCallback(result);
}
}
}
return result;
}