1 | package SevenZip;
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2 |
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3 | public class LzmaAlone
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4 | {
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5 | static public class CommandLine
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6 | {
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7 | public static final int kEncode = 0;
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8 | public static final int kDecode = 1;
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9 | public static final int kBenchmak = 2;
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10 |
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11 | public int Command = -1;
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12 | public int NumBenchmarkPasses = 10;
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13 |
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14 | public int DictionarySize = 1 << 23;
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15 | public boolean DictionarySizeIsDefined = false;
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16 |
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17 | public int Lc = 3;
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18 | public int Lp = 0;
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19 | public int Pb = 2;
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20 |
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21 | public int Fb = 128;
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22 | public boolean FbIsDefined = false;
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23 |
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24 | public boolean Eos = false;
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25 |
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26 | public int Algorithm = 2;
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27 | public int MatchFinder = 1;
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28 |
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29 | public String InFile;
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30 | public String OutFile;
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31 |
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32 | boolean ParseSwitch(String s)
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33 | {
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34 | if (s.startsWith("d"))
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35 | {
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36 | DictionarySize = 1 << Integer.parseInt(s.substring(1));
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37 | DictionarySizeIsDefined = true;
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38 | }
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39 | else if (s.startsWith("fb"))
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40 | {
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41 | Fb = Integer.parseInt(s.substring(2));
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42 | FbIsDefined = true;
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43 | }
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44 | else if (s.startsWith("a"))
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45 | Algorithm = Integer.parseInt(s.substring(1));
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46 | else if (s.startsWith("lc"))
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47 | Lc = Integer.parseInt(s.substring(2));
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48 | else if (s.startsWith("lp"))
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49 | Lp = Integer.parseInt(s.substring(2));
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50 | else if (s.startsWith("pb"))
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51 | Pb = Integer.parseInt(s.substring(2));
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52 | else if (s.startsWith("eos"))
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53 | Eos = true;
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54 | else if (s.startsWith("mf"))
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55 | {
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56 | String mfs = s.substring(2);
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57 | if (mfs.equals("bt2"))
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58 | MatchFinder = 0;
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59 | else if (mfs.equals("bt4"))
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60 | MatchFinder = 1;
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61 | else if (mfs.equals("bt4b"))
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62 | MatchFinder = 2;
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63 | else
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64 | return false;
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65 | }
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66 | else
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67 | return false;
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68 | return true;
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69 | }
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70 |
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71 | public boolean Parse(String[] args) throws Exception
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72 | {
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73 | int pos = 0;
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74 | boolean switchMode = true;
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75 | for (int i = 0; i < args.length; i++)
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76 | {
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77 | String s = args[i];
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78 | if (s.length() == 0)
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79 | return false;
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80 | if (switchMode)
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81 | {
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82 | if (s.compareTo("--") == 0)
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83 | {
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84 | switchMode = false;
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85 | continue;
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86 | }
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87 | if (s.charAt(0) == '-')
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88 | {
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89 | String sw = s.substring(1).toLowerCase();
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90 | if (sw.length() == 0)
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91 | return false;
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92 | try
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93 | {
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94 | if (!ParseSwitch(sw))
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95 | return false;
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96 | }
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97 | catch (NumberFormatException e)
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98 | {
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99 | return false;
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100 | }
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101 | continue;
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102 | }
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103 | }
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104 | if (pos == 0)
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105 | {
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106 | if (s.equalsIgnoreCase("e"))
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107 | Command = kEncode;
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108 | else if (s.equalsIgnoreCase("d"))
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109 | Command = kDecode;
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110 | else if (s.equalsIgnoreCase("b"))
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111 | Command = kBenchmak;
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112 | else
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113 | return false;
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114 | }
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115 | else if(pos == 1)
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116 | {
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117 | if (Command == kBenchmak)
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118 | {
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119 | try
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120 | {
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121 | NumBenchmarkPasses = Integer.parseInt(s);
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122 | if (NumBenchmarkPasses < 1)
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123 | return false;
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124 | }
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125 | catch (NumberFormatException e)
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126 | {
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127 | return false;
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128 | }
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129 | }
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130 | else
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131 | InFile = s;
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132 | }
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133 | else if(pos == 2)
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134 | OutFile = s;
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135 | else
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136 | return false;
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137 | pos++;
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138 | continue;
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139 | }
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140 | return true;
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141 | }
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142 | }
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143 |
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144 |
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145 | static void PrintHelp()
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146 | {
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147 | System.out.println(
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148 | "\nUsage: LZMA <e|d> [<switches>...] inputFile outputFile\n" +
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149 | " e: encode file\n" +
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150 | " d: decode file\n" +
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151 | " b: Benchmark\n" +
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152 | "<Switches>\n" +
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153 | // " -a{N}: set compression mode - [0, 1], default: 1 (max)\n" +
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154 | " -d{N}: set dictionary - [0,28], default: 23 (8MB)\n" +
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155 | " -fb{N}: set number of fast bytes - [5, 273], default: 128\n" +
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156 | " -lc{N}: set number of literal context bits - [0, 8], default: 3\n" +
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157 | " -lp{N}: set number of literal pos bits - [0, 4], default: 0\n" +
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158 | " -pb{N}: set number of pos bits - [0, 4], default: 2\n" +
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159 | " -mf{MF_ID}: set Match Finder: [bt2, bt4], default: bt4\n" +
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160 | " -eos: write End Of Stream marker\n"
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161 | );
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162 | }
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163 |
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164 | public static void main2(String[] args) throws Exception {
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165 | main( args );
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166 | }
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167 |
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168 | public static void main(String[] args) throws Exception
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169 | {
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170 | System.out.println("\nLZMA (Java) 4.42 Copyright (c) 1999-2006 Igor Pavlov 2006-05-15\n");
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171 |
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172 | if (args.length < 1)
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173 | {
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174 | PrintHelp();
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175 | return;
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176 | }
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177 |
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178 | CommandLine params = new CommandLine();
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179 | if (!params.Parse(args))
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180 | {
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181 | System.out.println("\nIncorrect command");
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182 | return;
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183 | }
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184 |
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185 | if (params.Command == CommandLine.kBenchmak)
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186 | {
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187 | int dictionary = (1 << 21);
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188 | if (params.DictionarySizeIsDefined)
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189 | dictionary = params.DictionarySize;
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190 | if (params.MatchFinder > 1)
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191 | throw new Exception("Unsupported match finder");
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192 | SevenZip.LzmaBench.LzmaBenchmark(params.NumBenchmarkPasses, dictionary);
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193 | }
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194 | else if (params.Command == CommandLine.kEncode || params.Command == CommandLine.kDecode)
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195 | {
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196 | java.io.File inFile = new java.io.File(params.InFile);
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197 | java.io.File outFile = new java.io.File(params.OutFile);
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198 |
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199 | java.io.BufferedInputStream inStream = new java.io.BufferedInputStream(new java.io.FileInputStream(inFile));
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200 | java.io.BufferedOutputStream outStream = new java.io.BufferedOutputStream(new java.io.FileOutputStream(outFile));
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201 |
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202 | boolean eos = false;
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203 | if (params.Eos)
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204 | eos = true;
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205 | if (params.Command == CommandLine.kEncode)
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206 | {
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207 | SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();
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208 | if (!encoder.SetAlgorithm(params.Algorithm))
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209 | throw new Exception("Incorrect compression mode");
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210 | if (!encoder.SetDictionarySize(params.DictionarySize))
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211 | throw new Exception("Incorrect dictionary size");
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212 | if (!encoder.SeNumFastBytes(params.Fb))
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213 | throw new Exception("Incorrect -fb value");
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214 | if (!encoder.SetMatchFinder(params.MatchFinder))
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215 | throw new Exception("Incorrect -mf value");
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216 | if (!encoder.SetLcLpPb(params.Lc, params.Lp, params.Pb))
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217 | throw new Exception("Incorrect -lc or -lp or -pb value");
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218 | encoder.SetEndMarkerMode(eos);
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219 | encoder.WriteCoderProperties(outStream);
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220 | long fileSize;
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221 | if (eos)
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222 | fileSize = -1;
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223 | else
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224 | fileSize = inFile.length();
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225 | for (int i = 0; i < 8; i++)
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226 | outStream.write((int)(fileSize >>> (8 * i)) & 0xFF);
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227 | encoder.Code(inStream, outStream, -1, -1, null);
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228 | }
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229 | else
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230 | {
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231 | int propertiesSize = 5;
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232 | byte[] properties = new byte[propertiesSize];
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233 | if (inStream.read(properties, 0, propertiesSize) != propertiesSize)
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234 | throw new Exception("input .lzma file is too short");
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235 | SevenZip.Compression.LZMA.Decoder decoder = new SevenZip.Compression.LZMA.Decoder();
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236 | if (!decoder.SetDecoderProperties(properties))
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237 | throw new Exception("Incorrect stream properties");
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238 | long outSize = 0;
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239 | for (int i = 0; i < 8; i++)
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240 | {
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241 | int v = inStream.read();
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242 | if (v < 0)
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243 | throw new Exception("Can't read stream size");
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244 | outSize |= ((long)v) << (8 * i);
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245 | }
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246 | if (!decoder.Code(inStream, outStream, outSize))
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247 | throw new Exception("Error in data stream");
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248 | }
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249 | outStream.flush();
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250 | outStream.close();
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251 | inStream.close();
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252 | }
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253 | else
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254 | throw new Exception("Incorrect command");
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255 | return;
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256 | }
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257 | }
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