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365 lines
10 KiB
C#
365 lines
10 KiB
C#
using System;
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using System.IO;
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namespace SevenZip
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{
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using CommandLineParser;
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public class CDoubleStream: Stream
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{
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public System.IO.Stream s1;
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public System.IO.Stream s2;
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public int fileIndex;
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public long skipSize;
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public override bool CanRead { get { return true; }}
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public override bool CanWrite { get { return false; }}
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public override bool CanSeek { get { return false; }}
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public override long Length { get { return s1.Length + s2.Length - skipSize; } }
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public override long Position
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{
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get { return 0; }
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set { }
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}
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public override void Flush() { }
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public override int Read(byte[] buffer, int offset, int count)
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{
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int numTotal = 0;
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while (count > 0)
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{
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if (fileIndex == 0)
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{
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int num = s1.Read(buffer, offset, count);
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offset += num;
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count -= num;
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numTotal += num;
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if (num == 0)
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fileIndex++;
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}
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if (fileIndex == 1)
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{
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numTotal += s2.Read(buffer, offset, count);
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return numTotal;
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}
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}
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return numTotal;
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}
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public override void Write(byte[] buffer, int offset, int count)
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{
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throw (new Exception("can't Write"));
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}
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public override long Seek(long offset, System.IO.SeekOrigin origin)
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{
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throw (new Exception("can't Seek"));
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}
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public override void SetLength(long value)
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{
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throw (new Exception("can't SetLength"));
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}
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}
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class LzmaAlone
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{
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enum Key
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{
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Help1 = 0,
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Help2,
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Mode,
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Dictionary,
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FastBytes,
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LitContext,
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LitPos,
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PosBits,
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MatchFinder,
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EOS,
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StdIn,
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StdOut,
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Train
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};
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static void PrintHelp()
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{
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System.Console.WriteLine("\nUsage: LZMA <e|d> [<switches>...] inputFile outputFile\n" +
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" e: encode file\n" +
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" d: decode file\n" +
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" b: Benchmark\n" +
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"<Switches>\n" +
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// " -a{N}: set compression mode - [0, 1], default: 1 (max)\n" +
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" -d{N}: set dictionary - [0, 29], default: 23 (8MB)\n" +
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" -fb{N}: set number of fast bytes - [5, 273], default: 128\n" +
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" -lc{N}: set number of literal context bits - [0, 8], default: 3\n" +
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" -lp{N}: set number of literal pos bits - [0, 4], default: 0\n" +
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" -pb{N}: set number of pos bits - [0, 4], default: 2\n" +
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" -mf{MF_ID}: set Match Finder: [bt2, bt4], default: bt4\n" +
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" -eos: write End Of Stream marker\n"
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// + " -si: read data from stdin\n"
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// + " -so: write data to stdout\n"
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);
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}
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static bool GetNumber(string s, out Int32 v)
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{
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v = 0;
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for (int i = 0; i < s.Length; i++)
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{
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char c = s[i];
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if (c < '0' || c > '9')
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return false;
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v *= 10;
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v += (Int32)(c - '0');
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}
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return true;
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}
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static int IncorrectCommand()
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{
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throw (new Exception("Command line error"));
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// System.Console.WriteLine("\nCommand line error\n");
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// return 1;
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}
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static int Main2(string[] args)
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{
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System.Console.WriteLine("\nLZMA# 4.61 2008-11-23\n");
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if (args.Length == 0)
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{
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PrintHelp();
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return 0;
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}
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SwitchForm[] kSwitchForms = new SwitchForm[13];
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int sw = 0;
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kSwitchForms[sw++] = new SwitchForm("?", SwitchType.Simple, false);
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kSwitchForms[sw++] = new SwitchForm("H", SwitchType.Simple, false);
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kSwitchForms[sw++] = new SwitchForm("A", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("D", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("FB", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("LC", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("LP", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("PB", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("MF", SwitchType.UnLimitedPostString, false, 1);
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kSwitchForms[sw++] = new SwitchForm("EOS", SwitchType.Simple, false);
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kSwitchForms[sw++] = new SwitchForm("SI", SwitchType.Simple, false);
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kSwitchForms[sw++] = new SwitchForm("SO", SwitchType.Simple, false);
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kSwitchForms[sw++] = new SwitchForm("T", SwitchType.UnLimitedPostString, false, 1);
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Parser parser = new Parser(sw);
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try
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{
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parser.ParseStrings(kSwitchForms, args);
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}
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catch
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{
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return IncorrectCommand();
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}
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if (parser[(int)Key.Help1].ThereIs || parser[(int)Key.Help2].ThereIs)
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{
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PrintHelp();
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return 0;
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}
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System.Collections.ArrayList nonSwitchStrings = parser.NonSwitchStrings;
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int paramIndex = 0;
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if (paramIndex >= nonSwitchStrings.Count)
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return IncorrectCommand();
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string command = (string)nonSwitchStrings[paramIndex++];
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command = command.ToLower();
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bool dictionaryIsDefined = false;
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Int32 dictionary = 1 << 21;
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if (parser[(int)Key.Dictionary].ThereIs)
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{
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Int32 dicLog;
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if (!GetNumber((string)parser[(int)Key.Dictionary].PostStrings[0], out dicLog))
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IncorrectCommand();
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dictionary = (Int32)1 << dicLog;
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dictionaryIsDefined = true;
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}
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string mf = "bt4";
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if (parser[(int)Key.MatchFinder].ThereIs)
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mf = (string)parser[(int)Key.MatchFinder].PostStrings[0];
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mf = mf.ToLower();
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if (command == "b")
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{
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const Int32 kNumDefaultItereations = 10;
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Int32 numIterations = kNumDefaultItereations;
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if (paramIndex < nonSwitchStrings.Count)
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if (!GetNumber((string)nonSwitchStrings[paramIndex++], out numIterations))
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numIterations = kNumDefaultItereations;
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return LzmaBench.LzmaBenchmark(numIterations, (UInt32)dictionary);
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}
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string train = "";
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if (parser[(int)Key.Train].ThereIs)
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train = (string)parser[(int)Key.Train].PostStrings[0];
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bool encodeMode = false;
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if (command == "e")
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encodeMode = true;
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else if (command == "d")
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encodeMode = false;
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else
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IncorrectCommand();
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bool stdInMode = parser[(int)Key.StdIn].ThereIs;
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bool stdOutMode = parser[(int)Key.StdOut].ThereIs;
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Stream inStream = null;
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if (stdInMode)
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{
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throw (new Exception("Not implemeted"));
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}
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else
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{
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if (paramIndex >= nonSwitchStrings.Count)
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IncorrectCommand();
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string inputName = (string)nonSwitchStrings[paramIndex++];
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inStream = new FileStream(inputName, FileMode.Open, FileAccess.Read);
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}
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FileStream outStream = null;
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if (stdOutMode)
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{
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throw (new Exception("Not implemeted"));
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}
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else
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{
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if (paramIndex >= nonSwitchStrings.Count)
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IncorrectCommand();
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string outputName = (string)nonSwitchStrings[paramIndex++];
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outStream = new FileStream(outputName, FileMode.Create, FileAccess.Write);
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}
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FileStream trainStream = null;
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if (train.Length != 0)
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trainStream = new FileStream(train, FileMode.Open, FileAccess.Read);
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if (encodeMode)
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{
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if (!dictionaryIsDefined)
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dictionary = 1 << 23;
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Int32 posStateBits = 2;
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Int32 litContextBits = 3; // for normal files
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// UInt32 litContextBits = 0; // for 32-bit data
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Int32 litPosBits = 0;
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// UInt32 litPosBits = 2; // for 32-bit data
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Int32 algorithm = 2;
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Int32 numFastBytes = 128;
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bool eos = parser[(int)Key.EOS].ThereIs || stdInMode;
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if (parser[(int)Key.Mode].ThereIs)
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if (!GetNumber((string)parser[(int)Key.Mode].PostStrings[0], out algorithm))
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IncorrectCommand();
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if (parser[(int)Key.FastBytes].ThereIs)
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if (!GetNumber((string)parser[(int)Key.FastBytes].PostStrings[0], out numFastBytes))
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IncorrectCommand();
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if (parser[(int)Key.LitContext].ThereIs)
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if (!GetNumber((string)parser[(int)Key.LitContext].PostStrings[0], out litContextBits))
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IncorrectCommand();
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if (parser[(int)Key.LitPos].ThereIs)
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if (!GetNumber((string)parser[(int)Key.LitPos].PostStrings[0], out litPosBits))
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IncorrectCommand();
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if (parser[(int)Key.PosBits].ThereIs)
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if (!GetNumber((string)parser[(int)Key.PosBits].PostStrings[0], out posStateBits))
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IncorrectCommand();
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CoderPropID[] propIDs =
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{
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CoderPropID.DictionarySize,
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CoderPropID.PosStateBits,
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CoderPropID.LitContextBits,
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CoderPropID.LitPosBits,
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CoderPropID.Algorithm,
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CoderPropID.NumFastBytes,
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CoderPropID.MatchFinder,
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CoderPropID.EndMarker
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};
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object[] properties =
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{
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(Int32)(dictionary),
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(Int32)(posStateBits),
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(Int32)(litContextBits),
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(Int32)(litPosBits),
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(Int32)(algorithm),
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(Int32)(numFastBytes),
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mf,
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eos
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};
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Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
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encoder.SetCoderProperties(propIDs, properties);
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encoder.WriteCoderProperties(outStream);
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Int64 fileSize;
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if (eos || stdInMode)
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fileSize = -1;
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else
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fileSize = inStream.Length;
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for (int i = 0; i < 8; i++)
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outStream.WriteByte((Byte)(fileSize >> (8 * i)));
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if (trainStream != null)
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{
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CDoubleStream doubleStream = new CDoubleStream();
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doubleStream.s1 = trainStream;
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doubleStream.s2 = inStream;
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doubleStream.fileIndex = 0;
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inStream = doubleStream;
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long trainFileSize = trainStream.Length;
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doubleStream.skipSize = 0;
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if (trainFileSize > dictionary)
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doubleStream.skipSize = trainFileSize - dictionary;
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trainStream.Seek(doubleStream.skipSize, SeekOrigin.Begin);
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encoder.SetTrainSize((uint)(trainFileSize - doubleStream.skipSize));
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}
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encoder.Code(inStream, outStream, -1, -1, null);
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}
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else if (command == "d")
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{
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byte[] properties = new byte[5];
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if (inStream.Read(properties, 0, 5) != 5)
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throw (new Exception("input .lzma is too short"));
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Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
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decoder.SetDecoderProperties(properties);
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if (trainStream != null)
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{
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if (!decoder.Train(trainStream))
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throw (new Exception("can't train"));
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}
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long outSize = 0;
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for (int i = 0; i < 8; i++)
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{
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int v = inStream.ReadByte();
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if (v < 0)
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throw (new Exception("Can't Read 1"));
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outSize |= ((long)(byte)v) << (8 * i);
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}
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long compressedSize = inStream.Length - inStream.Position;
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decoder.Code(inStream, outStream, compressedSize, outSize, null);
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}
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else
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throw (new Exception("Command Error"));
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return 0;
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}
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[STAThread]
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static int Main(string[] args)
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{
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try
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{
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return Main2(args);
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}
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catch (Exception e)
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{
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Console.WriteLine("{0} Caught exception #1.", e);
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// throw e;
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return 1;
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}
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}
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}
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}
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