public static int Compress(Stream input, Stream output)
{
var length = (int)(input.Length - input.Position);
var varInt = new VarInt32(length).GetEncodedValue();
output.Write(varInt, 0, varInt.Length);
int bytesWritten = varInt.Length;
int bytesToRead = Math.Min(length, CompressorConstants.BlockSize);
var fragment = MemoryPool.Instance.Take(bytesToRead);
int maxOutput = MaxCompressedOutput(bytesToRead);
var block = MemoryPool.Instance.Take(maxOutput);
while (length > 0)
{
var fragmentSize = input.Read(fragment, 0, bytesToRead);
var hashTable = new HashTable(fragmentSize);
int blockSize = CompressFragment(fragment, fragmentSize, hashTable, block);
output.Write(block, 0, blockSize);
bytesWritten += blockSize;
length -= bytesToRead;
}
MemoryPool.Instance.Return(fragment);
MemoryPool.Instance.Return(block);
return(bytesWritten);
}
public int Compress(Stream input, Stream output)
{
var length = (int) input.Length;
var varInt = new VarInt32(length).GetEncodedValue();
output.Write(varInt, 0, varInt.Length);
int bytesWritten = varInt.Length;
int bytesToRead = Math.Min(length, CompressorConstants.BlockSize);
var fragment = new byte[bytesToRead];
int maxOutput = MaxCompressedOutput(bytesToRead);
var block = new byte[maxOutput];
while (length > 0)
{
var fragmentSize = input.Read(fragment, 0, bytesToRead);
var hashTable = new HashTable(fragmentSize);
int blockSize = CompressFragment(fragment, fragmentSize, hashTable, block);
output.Write(block, 0, blockSize);
bytesWritten += blockSize;
length -= bytesToRead;
}
return bytesWritten;
}
public static int Compress(Stream input, Stream output)
{
var length = (int)(input.Length - input.Position);
var varInt = new VarInt32(length).GetEncodedValue();
output.Write(varInt, 0, varInt.Length);
int bytesWritten = varInt.Length;
int bytesToRead = Math.Min(length, CompressorConstants.BlockSize);
var fragment = MemoryPool.Instance.Take(bytesToRead);
int maxOutput = MaxCompressedOutput(bytesToRead);
var block = MemoryPool.Instance.Take(maxOutput);
while (length > 0)
{
var fragmentSize = input.Read(fragment, 0, bytesToRead);
var hashTable = new HashTable(fragmentSize);
int blockSize = CompressFragment(fragment, fragmentSize, hashTable, block);
output.Write(block, 0, blockSize);
bytesWritten += blockSize;
length -= bytesToRead;
}
MemoryPool.Instance.Return(fragment);
MemoryPool.Instance.Return(block);
return bytesWritten;
}
public void QuadByteEncode()
{
var varint = new VarInt32(0x200000);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0x80, 0x80, 0x80, 0x01 }));
varint = new VarInt32(0xfffffff);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0xff, 0xff, 0xff, 0x7f }));
}
public void NegativeEncode()
{
var varint = new VarInt32(-1);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0xff, 0xff, 0xff, 0xff, 0xf }));
varint = new VarInt32(int.MinValue);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0x80, 0x80, 0x80, 0x80, 0x8 }));
}
public void FullByteEncode()
{
var varint = new VarInt32(0x10000000);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0x80, 0x80, 0x80, 0x80, 0x01 }));
varint = new VarInt32(int.MaxValue);
Assert.That(varint.GetEncodedValue(), Is.EqualTo(new byte[] { 0xff, 0xff, 0xff, 0xff, 0x7 }));
}
public void DoubleByteDecode()
{
var varint = new VarInt32(new byte[] { 0x80, 0x1 });
Assert.That(varint.Value, Is.EqualTo(128));
}