public void AddFile(FileSegment segment, CancellationToken cancellationToken, IProgressHandler progress)
{
string name = segment.Name;
string path = segment.Path;
Guard.IsNotNullOrEmpty(name, nameof(name));
Guard.IsNotNullOrEmpty(path, nameof(path));
stream.Write(StreamKind.FS_CODE);
stream.Write(2 * name.Length);
for (int n = 0; n < name.Length; n++)
{
stream.Write(name[n]);
}
IStreamPosition sizePosition = stream.SavePosition();
stream.Write(0L);
using (FileEncodingInputStream fileStream = new FileEncodingInputStream(path, platform)) {
long sequenceLength = encoder.Encode(fileStream, stream, encodingToken, cancellationToken, progress);
LayoutStreamInMemory(sequenceLength);
IStreamPosition endPosition = stream.SavePosition();
stream.RestorePosition(sizePosition);
stream.Write(sequenceLength);
stream.RestorePosition(endPosition);
}
}
private byte[] Encode(byte[] data, out HuffmanTreeBase tree, out long streamSize)
{
MemoryStream outputMemoryStream = new MemoryStream();
FileEncodingInputStream inputStream = CreateFileEncodingInputStream(data);
FileEncodingOutputStream outputStream = CreateFileEncodingOutputStream(outputMemoryStream);
HuffmanEncoder encoder = new HuffmanEncoder();
try {
outputStream.BeginWrite();
EncodingToken token = encoder.CreateEncodingToken(inputStream, CancellationToken.None);
streamSize = encoder.Encode(inputStream, outputStream, token, CancellationToken.None, null);
outputStream.EndWrite();
tree = token.HuffmanTree;
return(outputMemoryStream.ToArray());
}
finally {
inputStream.Dispose();
outputStream.Dispose();
}
}
public void ReadSymbolTest()
{
byte[] data = { 0xFF, 0x33, 0x00, 0x12, 0x78 };
byte symbol;
using (FileEncodingInputStream stream = CreateFileEncodingInputStream(data)) {
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0xFF, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x33, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x00, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x12, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x78, symbol);
Assert.IsFalse(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x00, symbol);
Assert.IsFalse(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x00, symbol);
}
}
public void ResetTest()
{
byte[] data = { 0x12, 0x35, 0x01, 0x14 };
byte symbol;
using (FileEncodingInputStream stream = CreateFileEncodingInputStream(data)) {
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x12, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x35, symbol);
stream.Reset();
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x12, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x35, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x01, symbol);
Assert.IsTrue(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x14, symbol);
Assert.IsFalse(stream.ReadSymbol(out symbol));
Assert.AreEqual(0x00, symbol);
}
}