Esempio n. 1
0
        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);
            }
        }
Esempio n. 2
0
        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();
            }
        }
Esempio n. 3
0
        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);
            }
        }
Esempio n. 4
0
        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);
            }
        }