Exemplo n.º 1
0
    public static void DecompressFileLZMA(Stream input, Stream output)
    {
        SevenZip.Compression.Lzma.Decoder coder = new SevenZip.Compression.Lzma.Decoder();
        input.Seek(0, SeekOrigin.Begin);
        output.Seek(0, SeekOrigin.Begin);

        // Read the decoder properties
        byte[] properties = new byte[kPropSize];
        input.Read(properties, 0, kPropSize);

        // Read in the decompress file size.
        byte[] fileLengthBytes = new byte[sizeof(long)];
        input.Read(fileLengthBytes, 0, 8);
        long fileLength = BitConverter.ToInt64(fileLengthBytes, 0);

        // Decompress the file.
        coder.SetDecoderProperties(properties);
        coder.Code(input, output, input.Length, fileLength, null);
        output.Flush();

        output.Seek(0, SeekOrigin.Begin);
    }
Exemplo n.º 2
0
        static int Main2(string[] args)
        {
            System.Console.WriteLine("\nLZMA# 4.61  2008-11-23\n");

            if (args.Length == 0)
            {
                PrintHelp();
                return(0);
            }

            SwitchForm[] kSwitchForms = new SwitchForm[13];
            int          sw           = 0;

            kSwitchForms[sw++] = new SwitchForm("?", SwitchType.Simple, false);
            kSwitchForms[sw++] = new SwitchForm("H", SwitchType.Simple, false);
            kSwitchForms[sw++] = new SwitchForm("A", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("D", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("FB", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("LC", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("LP", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("PB", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("MF", SwitchType.UnLimitedPostString, false, 1);
            kSwitchForms[sw++] = new SwitchForm("EOS", SwitchType.Simple, false);
            kSwitchForms[sw++] = new SwitchForm("SI", SwitchType.Simple, false);
            kSwitchForms[sw++] = new SwitchForm("SO", SwitchType.Simple, false);
            kSwitchForms[sw++] = new SwitchForm("T", SwitchType.UnLimitedPostString, false, 1);


            Parser parser = new Parser(sw);

            try
            {
                parser.ParseStrings(kSwitchForms, args);
            }
            catch
            {
                return(IncorrectCommand());
            }

            if (parser[(int)Key.Help1].ThereIs || parser[(int)Key.Help2].ThereIs)
            {
                PrintHelp();
                return(0);
            }

            System.Collections.ArrayList nonSwitchStrings = parser.NonSwitchStrings;

            int paramIndex = 0;

            if (paramIndex >= nonSwitchStrings.Count)
            {
                return(IncorrectCommand());
            }
            string command = (string)nonSwitchStrings[paramIndex++];

            command = command.ToLower();

            bool  dictionaryIsDefined = false;
            Int32 dictionary          = 1 << 21;

            if (parser[(int)Key.Dictionary].ThereIs)
            {
                Int32 dicLog;
                if (!GetNumber((string)parser[(int)Key.Dictionary].PostStrings[0], out dicLog))
                {
                    IncorrectCommand();
                }
                dictionary          = (Int32)1 << dicLog;
                dictionaryIsDefined = true;
            }
            string mf = "bt4";

            if (parser[(int)Key.MatchFinder].ThereIs)
            {
                mf = (string)parser[(int)Key.MatchFinder].PostStrings[0];
            }
            mf = mf.ToLower();

            if (command == "b")
            {
                const Int32 kNumDefaultItereations = 10;
                Int32       numIterations          = kNumDefaultItereations;
                if (paramIndex < nonSwitchStrings.Count)
                {
                    if (!GetNumber((string)nonSwitchStrings[paramIndex++], out numIterations))
                    {
                        numIterations = kNumDefaultItereations;
                    }
                }
                return(LzmaBench.LzmaBenchmark(numIterations, (UInt32)dictionary));
            }

            string train = "";

            if (parser[(int)Key.Train].ThereIs)
            {
                train = (string)parser[(int)Key.Train].PostStrings[0];
            }

            bool encodeMode = false;

            if (command == "e")
            {
                encodeMode = true;
            }
            else if (command == "d")
            {
                encodeMode = false;
            }
            else
            {
                IncorrectCommand();
            }

            bool stdInMode  = parser[(int)Key.StdIn].ThereIs;
            bool stdOutMode = parser[(int)Key.StdOut].ThereIs;

            Stream inStream = null;

            if (stdInMode)
            {
                throw (new Exception("Not implemeted"));
            }
            else
            {
                if (paramIndex >= nonSwitchStrings.Count)
                {
                    IncorrectCommand();
                }
                string inputName = (string)nonSwitchStrings[paramIndex++];
                inStream = new FileStream(inputName, FileMode.Open, FileAccess.Read);
            }

            FileStream outStream = null;

            if (stdOutMode)
            {
                throw (new Exception("Not implemeted"));
            }
            else
            {
                if (paramIndex >= nonSwitchStrings.Count)
                {
                    IncorrectCommand();
                }
                string outputName = (string)nonSwitchStrings[paramIndex++];
                outStream = new FileStream(outputName, FileMode.Create, FileAccess.Write);
            }

            FileStream trainStream = null;

            if (train.Length != 0)
            {
                trainStream = new FileStream(train, FileMode.Open, FileAccess.Read);
            }

            if (encodeMode)
            {
                if (!dictionaryIsDefined)
                {
                    dictionary = 1 << 23;
                }

                Int32 posStateBits   = 2;
                Int32 litContextBits = 3;                 // for normal files
                // UInt32 litContextBits = 0; // for 32-bit data
                Int32 litPosBits = 0;
                // UInt32 litPosBits = 2; // for 32-bit data
                Int32 algorithm    = 2;
                Int32 numFastBytes = 128;

                bool eos = parser[(int)Key.EOS].ThereIs || stdInMode;

                if (parser[(int)Key.Mode].ThereIs)
                {
                    if (!GetNumber((string)parser[(int)Key.Mode].PostStrings[0], out algorithm))
                    {
                        IncorrectCommand();
                    }
                }

                if (parser[(int)Key.FastBytes].ThereIs)
                {
                    if (!GetNumber((string)parser[(int)Key.FastBytes].PostStrings[0], out numFastBytes))
                    {
                        IncorrectCommand();
                    }
                }
                if (parser[(int)Key.LitContext].ThereIs)
                {
                    if (!GetNumber((string)parser[(int)Key.LitContext].PostStrings[0], out litContextBits))
                    {
                        IncorrectCommand();
                    }
                }
                if (parser[(int)Key.LitPos].ThereIs)
                {
                    if (!GetNumber((string)parser[(int)Key.LitPos].PostStrings[0], out litPosBits))
                    {
                        IncorrectCommand();
                    }
                }
                if (parser[(int)Key.PosBits].ThereIs)
                {
                    if (!GetNumber((string)parser[(int)Key.PosBits].PostStrings[0], out posStateBits))
                    {
                        IncorrectCommand();
                    }
                }

                CoderPropID[] propIDs =
                {
                    CoderPropID.DictionarySize,
                    CoderPropID.PosStateBits,
                    CoderPropID.LitContextBits,
                    CoderPropID.LitPosBits,
                    CoderPropID.Algorithm,
                    CoderPropID.NumFastBytes,
                    CoderPropID.MatchFinder,
                    CoderPropID.EndMarker
                };
                object[] properties =
                {
                    (Int32)(dictionary),
                    (Int32)(posStateBits),
                    (Int32)(litContextBits),
                    (Int32)(litPosBits),
                    (Int32)(algorithm),
                    (Int32)(numFastBytes),
                    mf,
                    eos
                };

                Compression.Lzma.Encoder encoder = new Compression.Lzma.Encoder();
                encoder.SetCoderProperties(propIDs, properties);
                encoder.WriteCoderProperties(outStream);
                Int64 fileSize;
                if (eos || stdInMode)
                {
                    fileSize = -1;
                }
                else
                {
                    fileSize = inStream.Length;
                }
                for (int i = 0; i < 8; i++)
                {
                    outStream.WriteByte((Byte)(fileSize >> (8 * i)));
                }
                if (trainStream != null)
                {
                    CDoubleStream doubleStream = new CDoubleStream();
                    doubleStream.s1        = trainStream;
                    doubleStream.s2        = inStream;
                    doubleStream.fileIndex = 0;
                    inStream = doubleStream;
                    long trainFileSize = trainStream.Length;
                    doubleStream.skipSize = 0;
                    if (trainFileSize > dictionary)
                    {
                        doubleStream.skipSize = trainFileSize - dictionary;
                    }
                    trainStream.Seek(doubleStream.skipSize, SeekOrigin.Begin);
                    encoder.SetTrainSize((uint)(trainFileSize - doubleStream.skipSize));
                }
                encoder.Code(inStream, outStream, -1, -1, null);
            }
            else if (command == "d")
            {
                byte[] properties = new byte[5];
                if (inStream.Read(properties, 0, 5) != 5)
                {
                    throw (new Exception("input .lzma is too short"));
                }
                Compression.Lzma.Decoder decoder = new Compression.Lzma.Decoder();
                decoder.SetDecoderProperties(properties);
                if (trainStream != null)
                {
                    if (!decoder.Train(trainStream))
                    {
                        throw (new Exception("can't train"));
                    }
                }
                long outSize = 0;
                for (int i = 0; i < 8; i++)
                {
                    int v = inStream.ReadByte();
                    if (v < 0)
                    {
                        throw (new Exception("Can't Read 1"));
                    }
                    outSize |= ((long)(byte)v) << (8 * i);
                }
                long compressedSize = inStream.Length - inStream.Position;
                decoder.Code(inStream, outStream, compressedSize, outSize, null);
            }
            else
            {
                throw (new Exception("Command Error"));
            }
            return(0);
        }
Exemplo n.º 3
0
        static public int LzmaBenchmark(Int32 numIterations, UInt32 dictionarySize)
        {
            if (numIterations <= 0)
            {
                return(0);
            }
            if (dictionarySize < (1 << 18))
            {
                System.Console.WriteLine("\nError: dictionary size for benchmark must be >= 19 (512 KB)");
                return(1);
            }
            System.Console.Write("\n       Compressing                Decompressing\n\n");

            Compression.Lzma.Encoder encoder = new Compression.Lzma.Encoder();
            Compression.Lzma.Decoder decoder = new Compression.Lzma.Decoder();


            CoderPropID[] propIDs =
            {
                CoderPropID.DictionarySize,
            };
            object[] properties =
            {
                (Int32)(dictionarySize),
            };

            UInt32 kBufferSize           = dictionarySize + kAdditionalSize;
            UInt32 kCompressedBufferSize = (kBufferSize / 2) + kCompressedAdditionalSize;

            encoder.SetCoderProperties(propIDs, properties);
            System.IO.MemoryStream propStream = new System.IO.MemoryStream();
            encoder.WriteCoderProperties(propStream);
            byte[] propArray = propStream.ToArray();

            CBenchRandomGenerator rg = new CBenchRandomGenerator();

            rg.Set(kBufferSize);
            rg.Generate();
            CRC crc = new CRC();

            crc.Init();
            crc.Update(rg.Buffer, 0, rg.BufferSize);

            CProgressInfo progressInfo = new CProgressInfo();

            progressInfo.ApprovedStart = dictionarySize;

            UInt64 totalBenchSize      = 0;
            UInt64 totalEncodeTime     = 0;
            UInt64 totalDecodeTime     = 0;
            UInt64 totalCompressedSize = 0;

            MemoryStream inStream         = new MemoryStream(rg.Buffer, 0, (int)rg.BufferSize);
            MemoryStream compressedStream = new MemoryStream((int)kCompressedBufferSize);
            CrcOutStream crcOutStream     = new CrcOutStream();

            for (Int32 i = 0; i < numIterations; i++)
            {
                progressInfo.Init();
                inStream.Seek(0, SeekOrigin.Begin);
                compressedStream.Seek(0, SeekOrigin.Begin);
                encoder.Code(inStream, compressedStream, -1, -1, progressInfo);
                TimeSpan sp2        = DateTime.UtcNow - progressInfo.Time;
                UInt64   encodeTime = (UInt64)sp2.Ticks;

                long compressedSize = compressedStream.Position;
                if (progressInfo.InSize == 0)
                {
                    throw (new Exception("Internal ERROR 1282"));
                }

                UInt64 decodeTime = 0;
                for (int j = 0; j < 2; j++)
                {
                    compressedStream.Seek(0, SeekOrigin.Begin);
                    crcOutStream.Init();

                    decoder.SetDecoderProperties(propArray);
                    UInt64          outSize   = kBufferSize;
                    System.DateTime startTime = DateTime.UtcNow;
                    decoder.Code(compressedStream, crcOutStream, 0, (Int64)outSize, null);
                    TimeSpan sp = (DateTime.UtcNow - startTime);
                    decodeTime = (ulong)sp.Ticks;
                    if (crcOutStream.GetDigest() != crc.GetDigest())
                    {
                        throw (new Exception("CRC Error"));
                    }
                }
                UInt64 benchSize = kBufferSize - (UInt64)progressInfo.InSize;
                PrintResults(dictionarySize, encodeTime, benchSize, false, 0);
                System.Console.Write("     ");
                PrintResults(dictionarySize, decodeTime, kBufferSize, true, (ulong)compressedSize);
                System.Console.WriteLine();

                totalBenchSize      += benchSize;
                totalEncodeTime     += encodeTime;
                totalDecodeTime     += decodeTime;
                totalCompressedSize += (ulong)compressedSize;
            }
            System.Console.WriteLine("---------------------------------------------------");
            PrintResults(dictionarySize, totalEncodeTime, totalBenchSize, false, 0);
            System.Console.Write("     ");
            PrintResults(dictionarySize, totalDecodeTime,
                         kBufferSize * (UInt64)numIterations, true, totalCompressedSize);
            System.Console.WriteLine("    Average");
            return(0);
        }