package SevenZip; public class LzmaAlone { static public class CommandLine { public static final int kEncode = 0; public static final int kDecode = 1; public static final int kBenchmak = 2; public int Command = -1; public int NumBenchmarkPasses = 10; public int DictionarySize = 1 << 23; public boolean DictionarySizeIsDefined = false; public int Lc = 3; public int Lp = 0; public int Pb = 2; public int Fb = 128; public boolean FbIsDefined = false; public boolean Eos = false; public int Algorithm = 2; public int MatchFinder = 1; public String InFile; public String OutFile; boolean ParseSwitch(String s) { if (s.startsWith("d")) { DictionarySize = 1 << Integer.parseInt(s.substring(1)); DictionarySizeIsDefined = true; } else if (s.startsWith("fb")) { Fb = Integer.parseInt(s.substring(2)); FbIsDefined = true; } else if (s.startsWith("a")) Algorithm = Integer.parseInt(s.substring(1)); else if (s.startsWith("lc")) Lc = Integer.parseInt(s.substring(2)); else if (s.startsWith("lp")) Lp = Integer.parseInt(s.substring(2)); else if (s.startsWith("pb")) Pb = Integer.parseInt(s.substring(2)); else if (s.startsWith("eos")) Eos = true; else if (s.startsWith("mf")) { String mfs = s.substring(2); if (mfs.equals("bt2")) MatchFinder = 0; else if (mfs.equals("bt4")) MatchFinder = 1; else if (mfs.equals("bt4b")) MatchFinder = 2; else return false; } else return false; return true; } public boolean Parse(String[] args) throws Exception { int pos = 0; boolean switchMode = true; for (int i = 0; i < args.length; i++) { String s = args[i]; if (s.length() == 0) return false; if (switchMode) { if (s.compareTo("--") == 0) { switchMode = false; continue; } if (s.charAt(0) == '-') { String sw = s.substring(1).toLowerCase(); if (sw.length() == 0) return false; try { if (!ParseSwitch(sw)) return false; } catch (NumberFormatException e) { return false; } continue; } } if (pos == 0) { if (s.equalsIgnoreCase("e")) Command = kEncode; else if (s.equalsIgnoreCase("d")) Command = kDecode; else if (s.equalsIgnoreCase("b")) Command = kBenchmak; else return false; } else if(pos == 1) { if (Command == kBenchmak) { try { NumBenchmarkPasses = Integer.parseInt(s); if (NumBenchmarkPasses < 1) return false; } catch (NumberFormatException e) { return false; } } else InFile = s; } else if(pos == 2) OutFile = s; else return false; pos++; continue; } return true; } } static void PrintHelp() { System.out.println( "\nUsage: LZMA <e|d> [<switches>...] inputFile outputFile\n" + " e: encode file\n" + " d: decode file\n" + " b: Benchmark\n" + "<Switches>\n" + // " -a{N}: set compression mode - [0, 1], default: 1 (max)\n" + " -d{N}: set dictionary - [0,28], default: 23 (8MB)\n" + " -fb{N}: set number of fast bytes - [5, 273], default: 128\n" + " -lc{N}: set number of literal context bits - [0, 8], default: 3\n" + " -lp{N}: set number of literal pos bits - [0, 4], default: 0\n" + " -pb{N}: set number of pos bits - [0, 4], default: 2\n" + " -mf{MF_ID}: set Match Finder: [bt2, bt4], default: bt4\n" + " -eos: write End Of Stream marker\n" ); } public static void main(String[] args) throws Exception { System.out.println("\nLZMA (Java) 4.42 Copyright (c) 1999-2006 Igor Pavlov 2006-05-15\n"); if (args.length < 1) { PrintHelp(); return; } CommandLine params = new CommandLine(); if (!params.Parse(args)) { System.out.println("\nIncorrect command"); return; } if (params.Command == CommandLine.kBenchmak) { int dictionary = (1 << 21); if (params.DictionarySizeIsDefined) dictionary = params.DictionarySize; if (params.MatchFinder > 1) throw new Exception("Unsupported match finder"); SevenZip.LzmaBench.LzmaBenchmark(params.NumBenchmarkPasses, dictionary); } else if (params.Command == CommandLine.kEncode || params.Command == CommandLine.kDecode) { java.io.File inFile = new java.io.File(params.InFile); java.io.File outFile = new java.io.File(params.OutFile); java.io.BufferedInputStream inStream = new java.io.BufferedInputStream(new java.io.FileInputStream(inFile)); java.io.BufferedOutputStream outStream = new java.io.BufferedOutputStream(new java.io.FileOutputStream(outFile)); boolean eos = false; if (params.Eos) eos = true; if (params.Command == CommandLine.kEncode) { SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder(); if (!encoder.SetAlgorithm(params.Algorithm)) throw new Exception("Incorrect compression mode"); if (!encoder.SetDictionarySize(params.DictionarySize)) throw new Exception("Incorrect dictionary size"); if (!encoder.SetNumFastBytes(params.Fb)) throw new Exception("Incorrect -fb value"); if (!encoder.SetMatchFinder(params.MatchFinder)) throw new Exception("Incorrect -mf value"); if (!encoder.SetLcLpPb(params.Lc, params.Lp, params.Pb)) throw new Exception("Incorrect -lc or -lp or -pb value"); encoder.SetEndMarkerMode(eos); encoder.WriteCoderProperties(outStream); long fileSize; if (eos) fileSize = -1; else fileSize = inFile.length(); for (int i = 0; i < 8; i++) outStream.write((int)(fileSize >>> (8 * i)) & 0xFF); encoder.Code(inStream, outStream, -1, -1, null); } else { int propertiesSize = 5; byte[] properties = new byte[propertiesSize]; if (inStream.read(properties, 0, propertiesSize) != propertiesSize) throw new Exception("input .lzma file is too short"); SevenZip.Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder(properties); long outSize = 0; for (int i = 0; i < 8; i++) { int v = inStream.read(); if (v < 0) throw new Exception("Can't read stream size"); outSize |= ((long)v) << (8 * i); } decoder.Code(inStream, outStream, outSize, null); } outStream.flush(); outStream.close(); inStream.close(); } else throw new Exception("Incorrect command"); return; } }