1 | /* |
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2 | * Interpreter.java |
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3 | * |
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4 | * Copyright (C) 2002-2006 Peter Graves |
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5 | * $Id: Interpreter.java 14089 2012-08-14 21:06:34Z ehuelsmann $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | import java.io.BufferedReader; |
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39 | import java.io.File; |
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40 | import java.io.IOException; |
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41 | import java.io.InputStream; |
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42 | import java.io.InputStreamReader; |
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43 | import java.io.OutputStream; |
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44 | |
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45 | public final class Interpreter |
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46 | { |
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47 | // There can only be one interpreter. |
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48 | public static Interpreter interpreter; |
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49 | |
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50 | private final boolean jlisp; |
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51 | private final InputStream inputStream; |
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52 | private final OutputStream outputStream; |
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53 | |
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54 | private static boolean noinit = false; |
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55 | private static boolean nosystem = false; |
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56 | private static boolean noinform = false; |
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57 | private static boolean help = false; |
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58 | private static boolean doubledash = false; |
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59 | |
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60 | public static synchronized Interpreter getInstance() |
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61 | { |
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62 | return interpreter; |
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63 | } |
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64 | |
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65 | // Interface. |
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66 | public static synchronized Interpreter createInstance() |
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67 | { |
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68 | if (interpreter != null) |
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69 | return null; |
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70 | interpreter = new Interpreter(); |
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71 | _NOINFORM_.setSymbolValue(T); |
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72 | initializeLisp(); |
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73 | return interpreter; |
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74 | } |
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75 | |
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76 | public static synchronized Interpreter createDefaultInstance(String[] args) |
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77 | { |
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78 | if (interpreter != null) |
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79 | return null; |
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80 | interpreter = new Interpreter(); |
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81 | |
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82 | if (args != null) |
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83 | preprocessCommandLineArguments(args); |
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84 | if (!noinform) { |
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85 | Stream out = getStandardOutput(); |
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86 | out._writeString(banner()); |
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87 | out._finishOutput(); |
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88 | } |
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89 | if (help) { |
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90 | Stream out = getStandardOutput(); |
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91 | out._writeString(help()); |
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92 | out._finishOutput(); |
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93 | exit(0); // FIXME |
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94 | } |
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95 | if (noinform) |
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96 | _NOINFORM_.setSymbolValue(T); |
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97 | else { |
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98 | double uptime = (System.currentTimeMillis() - Main.startTimeMillis) / 1000.0; |
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99 | getStandardOutput()._writeString("Low-level initialization completed in " + |
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100 | uptime + " seconds.\n"); |
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101 | } |
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102 | initializeLisp(); |
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103 | initializeTopLevel(); |
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104 | if (!nosystem) |
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105 | initializeSystem(); |
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106 | if (!noinit) |
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107 | processInitializationFile(); |
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108 | doubledash = false; |
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109 | if (args != null) |
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110 | postprocessCommandLineArguments(args); |
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111 | |
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112 | return interpreter; |
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113 | } |
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114 | |
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115 | public static synchronized Interpreter createJLispInstance( |
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116 | InputStream in, |
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117 | OutputStream out, |
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118 | String initialDirectory, |
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119 | String version) |
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120 | { |
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121 | if (interpreter != null) |
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122 | return null; |
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123 | interpreter = new Interpreter(in, out, initialDirectory); |
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124 | |
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125 | Stream stdout = getStandardOutput(); |
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126 | stdout._writeLine(version); |
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127 | stdout._writeString(banner()); |
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128 | stdout._finishOutput(); |
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129 | |
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130 | initializeJLisp(); |
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131 | initializeTopLevel(); |
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132 | initializeSystem(); |
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133 | processInitializationFile(); |
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134 | return interpreter; |
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135 | } |
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136 | |
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137 | public static boolean initialized() { |
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138 | return initialized; |
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139 | } |
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140 | |
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141 | private Interpreter() |
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142 | { |
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143 | jlisp = false; |
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144 | inputStream = null; |
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145 | outputStream = null; |
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146 | } |
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147 | |
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148 | private Interpreter(InputStream inputStream, OutputStream outputStream, |
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149 | String initialDirectory) |
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150 | { |
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151 | jlisp = true; |
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152 | this.inputStream = inputStream; |
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153 | this.outputStream = outputStream; |
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154 | resetIO(new Stream(Symbol.SYSTEM_STREAM, inputStream, Symbol.CHARACTER), |
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155 | new Stream(Symbol.SYSTEM_STREAM, outputStream, Symbol.CHARACTER)); |
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156 | if (!initialDirectory.endsWith(File.separator)) |
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157 | initialDirectory = initialDirectory.concat(File.separator); |
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158 | Symbol.DEFAULT_PATHNAME_DEFAULTS.setSymbolValue(new Pathname(initialDirectory)); |
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159 | } |
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160 | |
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161 | // Interface. |
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162 | public LispObject eval(String s) |
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163 | { |
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164 | return Lisp.eval(new StringInputStream(s).read(true, NIL, false, |
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165 | LispThread.currentThread(), |
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166 | Stream.currentReadtable)); |
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167 | } |
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168 | |
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169 | public static synchronized void initializeLisp() |
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170 | { |
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171 | if (!initialized) { |
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172 | Load.loadSystemFile("boot.lisp", false, false, false); |
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173 | initialized = true; |
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174 | } |
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175 | } |
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176 | |
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177 | public static synchronized void initializeJLisp() |
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178 | { |
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179 | if (!initialized) { |
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180 | Symbol.FEATURES.setSymbolValue(new Cons(Keyword.J, |
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181 | Symbol.FEATURES.getSymbolValue())); |
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182 | Load.loadSystemFile("boot.lisp", false, false, false); |
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183 | |
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184 | try { |
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185 | Class.forName("org.armedbear.j.LispAPI"); |
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186 | } |
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187 | catch (ClassNotFoundException e) { } // FIXME: what to do? |
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188 | |
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189 | Load.loadSystemFile("j.lisp", false); // not being autoloaded |
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190 | |
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191 | initialized = true; |
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192 | } |
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193 | } |
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194 | |
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195 | private static boolean topLevelInitialized; |
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196 | |
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197 | private static synchronized void initializeTopLevel() |
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198 | { |
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199 | if (!topLevelInitialized) { |
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200 | // Resolve top-level-loop autoload. |
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201 | Symbol TOP_LEVEL_LOOP = intern("TOP-LEVEL-LOOP", PACKAGE_TPL); |
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202 | LispObject tplFun = TOP_LEVEL_LOOP.getSymbolFunction(); |
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203 | if (tplFun instanceof Autoload) { |
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204 | Autoload autoload = (Autoload) tplFun; |
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205 | autoload.load(); |
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206 | } |
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207 | |
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208 | topLevelInitialized = true; |
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209 | } |
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210 | } |
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211 | |
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212 | private static synchronized void processInitializationFile() |
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213 | { |
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214 | try { |
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215 | String userHome = System.getProperty("user.home"); |
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216 | File file = new File(userHome, ".abclrc"); |
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217 | if (file.isFile()) { |
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218 | final double startLoad = System.currentTimeMillis(); |
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219 | Load.load(file.getCanonicalPath()); |
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220 | if (!noinform) { |
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221 | final double loadtime |
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222 | = (System.currentTimeMillis() - startLoad) / 1000.0; |
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223 | getStandardOutput() |
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224 | ._writeString("Loading " + file + " completed in " |
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225 | + loadtime + " seconds.\n"); |
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226 | } |
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227 | return; |
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228 | } |
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229 | } |
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230 | catch (IOException e) { |
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231 | e.printStackTrace(); |
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232 | } |
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233 | } |
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234 | |
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235 | private static synchronized void initializeSystem() |
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236 | { |
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237 | Load.loadSystemFile("system", false); // not being autoloaded |
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238 | } |
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239 | |
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240 | // Check for --noinit; verify that arguments are supplied for --load and |
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241 | // --eval options. Copy all unrecognized arguments into |
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242 | // ext:*command-line-argument-list* |
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243 | private static void preprocessCommandLineArguments(String[] args) |
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244 | { |
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245 | LispObject arglist = NIL; |
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246 | |
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247 | if (args != null) { |
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248 | for (int i = 0; i < args.length; ++i) { |
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249 | String arg = args[i]; |
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250 | if (doubledash) { |
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251 | arglist = new Cons(args[i], arglist); |
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252 | } else if (arg.equals("--")) { |
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253 | doubledash = true; |
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254 | } else if (arg.equals("--noinit")) { |
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255 | noinit = true; |
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256 | } else if (arg.equals("--nosystem")) { |
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257 | nosystem = true; |
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258 | } else if (arg.equals("--noinform")) { |
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259 | noinform = true; |
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260 | } else if (arg.equals("--help")) { |
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261 | help = true; |
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262 | } else if (arg.equals("--batch")) { |
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263 | _BATCH_MODE_.setSymbolValue(T); |
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264 | } else if (arg.equals("--eval")) { |
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265 | if (i + 1 < args.length) { |
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266 | ++i; |
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267 | } else { |
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268 | System.err.println("No argument supplied to --eval"); |
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269 | exit(1); // FIXME |
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270 | } |
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271 | } else if (arg.equals("--load") || |
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272 | arg.equals("--load-system-file")) { |
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273 | if (i + 1 < args.length) { |
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274 | ++i; |
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275 | } else { |
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276 | System.err.println("No argument supplied to --load"); |
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277 | exit(1); // FIXME |
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278 | } |
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279 | } else { |
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280 | arglist = new Cons(args[i], arglist); |
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281 | } |
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282 | } |
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283 | } |
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284 | arglist.nreverse(); |
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285 | |
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286 | _COMMAND_LINE_ARGUMENT_LIST_.setSymbolValue(arglist); |
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287 | } |
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288 | |
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289 | // Do the --load and --eval actions. |
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290 | private static void postprocessCommandLineArguments(String[] args) |
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291 | |
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292 | { |
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293 | if (args != null) { |
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294 | for (int i = 0; i < args.length; ++i) { |
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295 | String arg = args[i]; |
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296 | if (doubledash) { |
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297 | continue; |
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298 | } else if (arg.equals("--")) { |
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299 | doubledash = true; |
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300 | } else if (arg.equals("--eval")) { |
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301 | if (i + 1 < args.length) { |
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302 | try { |
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303 | evaluate(args[i + 1]); |
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304 | } |
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305 | catch (UnhandledCondition c) { |
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306 | final String separator = |
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307 | System.getProperty("line.separator"); |
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308 | StringBuilder sb = new StringBuilder(); |
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309 | sb.append(separator); |
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310 | sb.append("Caught "); |
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311 | sb.append(c.getCondition().typeOf().printObject()); |
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312 | sb.append(" while processing --eval option \"" + |
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313 | args[i + 1] + "\":"); |
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314 | sb.append(separator); |
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315 | sb.append(" "); |
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316 | final LispThread thread = LispThread.currentThread(); |
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317 | thread.bindSpecial(Symbol.PRINT_ESCAPE, NIL); |
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318 | sb.append(c.getCondition().princToString()); |
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319 | sb.append(separator); |
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320 | System.err.print(sb.toString()); |
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321 | exit(2); // FIXME |
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322 | } |
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323 | ++i; |
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324 | } else { |
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325 | // Shouldn't happen. |
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326 | System.err.println("No argument supplied to --eval"); |
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327 | exit(1); // FIXME |
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328 | } |
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329 | } else if (arg.equals("--load") || |
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330 | arg.equals("--load-system-file")) { |
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331 | if (i + 1 < args.length) { |
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332 | if (arg.equals("--load")) |
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333 | Load.load(Pathname.mergePathnames(new Pathname(args[i + 1]), |
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334 | checkPathname(Symbol.DEFAULT_PATHNAME_DEFAULTS.getSymbolValue())), |
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335 | false, false, true); |
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336 | |
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337 | else |
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338 | Load.loadSystemFile(args[i + 1], false); // not being autoloaded |
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339 | ++i; |
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340 | } else { |
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341 | // Shouldn't happen. |
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342 | System.err.println("No argument supplied to --load"); |
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343 | exit(1); // FIXME |
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344 | } |
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345 | } |
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346 | } |
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347 | } |
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348 | if (_BATCH_MODE_.getSymbolValue() == T) { |
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349 | exit(0); // FIXME |
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350 | } |
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351 | } |
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352 | |
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353 | @SuppressWarnings("CallToThreadDumpStack") |
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354 | public void run() |
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355 | { |
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356 | final LispThread thread = LispThread.currentThread(); |
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357 | try { |
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358 | Symbol TOP_LEVEL_LOOP = intern("TOP-LEVEL-LOOP", PACKAGE_TPL); |
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359 | LispObject tplFun = TOP_LEVEL_LOOP.getSymbolFunction(); |
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360 | if (tplFun instanceof Function) { |
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361 | thread.execute(tplFun); |
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362 | return; |
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363 | } |
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364 | } |
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365 | catch (ProcessingTerminated e) { |
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366 | throw e; |
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367 | } |
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368 | catch (IntegrityError e) { |
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369 | return; |
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370 | } |
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371 | catch (Throwable t) { |
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372 | t.printStackTrace(); |
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373 | return; |
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374 | } |
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375 | |
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376 | // We only arrive here if something went wrong and we weren't able |
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377 | // to load top-level.lisp and run the normal top-level loop. |
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378 | Stream out = getStandardOutput(); |
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379 | while (true) { |
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380 | try { |
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381 | thread.resetStack(); |
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382 | thread.clearSpecialBindings(); |
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383 | out._writeString("* "); |
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384 | out._finishOutput(); |
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385 | LispObject object = |
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386 | getStandardInput().read(false, EOF, false, thread, |
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387 | Stream.currentReadtable); |
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388 | if (object == EOF) |
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389 | break; |
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390 | out.setCharPos(0); |
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391 | Symbol.MINUS.setSymbolValue(object); |
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392 | LispObject result = Lisp.eval(object, new Environment(), thread); |
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393 | Debug.assertTrue(result != null); |
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394 | Symbol.STAR_STAR_STAR.setSymbolValue(Symbol.STAR_STAR.getSymbolValue()); |
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395 | Symbol.STAR_STAR.setSymbolValue(Symbol.STAR.getSymbolValue()); |
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396 | Symbol.STAR.setSymbolValue(result); |
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397 | Symbol.PLUS_PLUS_PLUS.setSymbolValue(Symbol.PLUS_PLUS.getSymbolValue()); |
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398 | Symbol.PLUS_PLUS.setSymbolValue(Symbol.PLUS.getSymbolValue()); |
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399 | Symbol.PLUS.setSymbolValue(Symbol.MINUS.getSymbolValue()); |
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400 | out = getStandardOutput(); |
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401 | out.freshLine(); |
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402 | LispObject[] values = thread.getValues(); |
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403 | Symbol.SLASH_SLASH_SLASH.setSymbolValue(Symbol.SLASH_SLASH.getSymbolValue()); |
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404 | Symbol.SLASH_SLASH.setSymbolValue(Symbol.SLASH.getSymbolValue()); |
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405 | if (values != null) { |
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406 | LispObject slash = NIL; |
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407 | for (int i = values.length; i-- > 0;) |
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408 | slash = new Cons(values[i], slash); |
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409 | Symbol.SLASH.setSymbolValue(slash); |
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410 | for (int i = 0; i < values.length; i++) |
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411 | out._writeLine(values[i].printObject()); |
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412 | } else { |
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413 | Symbol.SLASH.setSymbolValue(new Cons(result)); |
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414 | out._writeLine(result.printObject()); |
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415 | } |
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416 | out._finishOutput(); |
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417 | } |
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418 | catch (StackOverflowError e) { |
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419 | getStandardInput().clearInput(); |
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420 | out._writeLine("Stack overflow"); |
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421 | } |
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422 | catch (ControlTransfer c) { |
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423 | // We're on the toplevel, if this occurs, |
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424 | // we're toast... |
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425 | reportError(c, thread); |
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426 | } |
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427 | catch (ProcessingTerminated e) { |
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428 | throw e; |
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429 | } |
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430 | catch (IntegrityError e) { |
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431 | return; |
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432 | } |
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433 | catch (Throwable t) { |
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434 | getStandardInput().clearInput(); |
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435 | out.printStackTrace(t); |
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436 | thread.printBacktrace(); |
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437 | } |
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438 | } |
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439 | } |
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440 | |
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441 | private static void reportError(ControlTransfer c, LispThread thread) |
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442 | { |
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443 | getStandardInput().clearInput(); |
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444 | Stream out = getStandardOutput(); |
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445 | out.freshLine(); |
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446 | Condition condition = (Condition) c.getCondition(); |
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447 | out._writeLine("Error: unhandled condition: " + |
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448 | condition.princToString()); |
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449 | if (thread != null) |
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450 | thread.printBacktrace(); |
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451 | } |
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452 | |
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453 | private static void reportError(UnhandledCondition c, LispThread thread) |
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454 | { |
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455 | getStandardInput().clearInput(); |
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456 | Stream out = getStandardOutput(); |
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457 | out.freshLine(); |
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458 | Condition condition = (Condition) c.getCondition(); |
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459 | out._writeLine("Error: unhandled condition: " + |
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460 | condition.princToString()); |
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461 | if (thread != null) |
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462 | thread.printBacktrace(); |
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463 | } |
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464 | |
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465 | public void kill(int status) |
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466 | { |
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467 | if (jlisp) { |
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468 | try { |
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469 | inputStream.close(); |
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470 | } |
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471 | catch (IOException e) { |
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472 | Debug.trace(e); |
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473 | } |
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474 | try { |
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475 | outputStream.close(); |
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476 | } |
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477 | catch (IOException e) { |
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478 | Debug.trace(e); |
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479 | } |
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480 | } else { |
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481 | ((Stream)Symbol.STANDARD_OUTPUT.getSymbolValue())._finishOutput(); |
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482 | ((Stream)Symbol.ERROR_OUTPUT.getSymbolValue())._finishOutput(); |
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483 | System.exit(status); |
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484 | } |
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485 | } |
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486 | |
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487 | public synchronized void dispose() |
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488 | { |
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489 | Debug.trace("Interpreter.dispose"); |
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490 | Debug.assertTrue(interpreter == this); |
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491 | interpreter = null; |
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492 | } |
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493 | |
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494 | @Override |
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495 | protected void finalize() throws Throwable |
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496 | { |
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497 | System.err.println("Interpreter.finalize"); |
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498 | } |
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499 | |
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500 | public static final class UnhandledCondition extends Error |
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501 | { |
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502 | LispObject condition; |
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503 | |
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504 | UnhandledCondition(LispObject condition) { |
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505 | this.condition = condition; |
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506 | } |
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507 | |
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508 | public LispObject getCondition() { |
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509 | return condition; |
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510 | } |
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511 | |
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512 | @Override |
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513 | public String getMessage() { |
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514 | String conditionText; |
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515 | LispThread thread = LispThread.currentThread(); |
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516 | SpecialBindingsMark mark = thread.markSpecialBindings(); |
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517 | thread.bindSpecial(Symbol.PRINT_ESCAPE, NIL); |
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518 | try { |
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519 | conditionText = getCondition().princToString(); |
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520 | } catch (Throwable t) { |
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521 | conditionText = "<error printing Lisp condition>"; |
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522 | } finally { |
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523 | thread.resetSpecialBindings(mark); |
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524 | } |
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525 | |
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526 | return "Unhandled lisp condition: " + conditionText; |
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527 | } |
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528 | |
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529 | |
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530 | }; |
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531 | |
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532 | private static final Primitive _DEBUGGER_HOOK_FUNCTION = |
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533 | new Primitive("%debugger-hook-function", PACKAGE_SYS, false) |
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534 | { |
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535 | @Override |
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536 | public LispObject execute(LispObject first, LispObject second) |
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537 | { |
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538 | final LispObject condition = first; |
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539 | if (interpreter == null) { |
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540 | final LispThread thread = LispThread.currentThread(); |
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541 | final SpecialBindingsMark mark = thread.markSpecialBindings(); |
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542 | thread.bindSpecial(Symbol.PRINT_ESCAPE, NIL); |
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543 | try { |
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544 | final LispObject truename = |
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545 | Symbol.LOAD_TRUENAME.symbolValue(thread); |
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546 | if (truename != NIL) { |
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547 | final LispObject stream = |
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548 | _LOAD_STREAM_.symbolValue(thread); |
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549 | if (stream instanceof Stream) { |
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550 | final int lineNumber = |
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551 | ((Stream)stream).getLineNumber() + 1; |
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552 | final int offset = |
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553 | ((Stream)stream).getOffset(); |
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554 | Debug.trace("Error loading " + |
---|
555 | truename.princToString() + |
---|
556 | " at line " + lineNumber + |
---|
557 | " (offset " + offset + ")"); |
---|
558 | } |
---|
559 | } |
---|
560 | Debug.trace("Encountered unhandled condition of type " + |
---|
561 | condition.typeOf().princToString() + ':'); |
---|
562 | Debug.trace(" " + condition.princToString()); |
---|
563 | } |
---|
564 | catch (Throwable t) {} // catch any exception to throw below |
---|
565 | finally { |
---|
566 | thread.resetSpecialBindings(mark); |
---|
567 | } |
---|
568 | } |
---|
569 | UnhandledCondition uc = new UnhandledCondition(condition); |
---|
570 | if (condition.typep(Symbol.JAVA_EXCEPTION) != NIL) |
---|
571 | uc.initCause((Throwable)JavaException |
---|
572 | .JAVA_EXCEPTION_CAUSE.execute(condition).javaInstance()); |
---|
573 | throw uc; |
---|
574 | } |
---|
575 | }; |
---|
576 | |
---|
577 | public static final LispObject readFromString(String s) |
---|
578 | { |
---|
579 | return new StringInputStream(s).read(true, NIL, false, |
---|
580 | LispThread.currentThread(), |
---|
581 | Stream.currentReadtable); |
---|
582 | } |
---|
583 | |
---|
584 | // For j. |
---|
585 | /** Runs its input string through the lisp reader and evaluates the result. |
---|
586 | * |
---|
587 | * @param s A string with a valid Common Lisp expression |
---|
588 | * @return The result of the evaluation |
---|
589 | * @exception UnhandledCondition in case the an error occurs which |
---|
590 | * should be passed to the Lisp debugger |
---|
591 | */ |
---|
592 | public static LispObject evaluate(String s) |
---|
593 | { |
---|
594 | if (!initialized) |
---|
595 | initializeJLisp(); |
---|
596 | StringInputStream stream = new StringInputStream(s); |
---|
597 | final LispThread thread = LispThread.currentThread(); |
---|
598 | LispObject obj = stream.read(false, EOF, false, thread, |
---|
599 | Stream.currentReadtable); |
---|
600 | if (obj == EOF) |
---|
601 | return error(new EndOfFile(stream)); |
---|
602 | final SpecialBindingsMark mark = thread.markSpecialBindings(); |
---|
603 | thread.bindSpecial(Symbol.DEBUGGER_HOOK, _DEBUGGER_HOOK_FUNCTION); |
---|
604 | try { |
---|
605 | return Lisp.eval(obj, new Environment(), thread); |
---|
606 | } |
---|
607 | finally { |
---|
608 | thread.resetSpecialBindings(mark); |
---|
609 | } |
---|
610 | } |
---|
611 | |
---|
612 | private static final String build; |
---|
613 | |
---|
614 | static { |
---|
615 | String s = null; |
---|
616 | InputStream in = Interpreter.class.getResourceAsStream("build"); |
---|
617 | if (in != null) { |
---|
618 | try { |
---|
619 | BufferedReader reader = |
---|
620 | new BufferedReader(new InputStreamReader(in)); |
---|
621 | s = reader.readLine(); |
---|
622 | reader.close(); |
---|
623 | } |
---|
624 | catch (IOException e) {} |
---|
625 | } |
---|
626 | build = s; |
---|
627 | } |
---|
628 | |
---|
629 | private static String banner() |
---|
630 | { |
---|
631 | final String sep = System.getProperty("line.separator"); |
---|
632 | StringBuilder sb = new StringBuilder("Armed Bear Common Lisp "); |
---|
633 | sb.append(Version.getVersion()); |
---|
634 | if (build != null) { |
---|
635 | sb.append(" (built "); |
---|
636 | sb.append(build); |
---|
637 | sb.append(')'); |
---|
638 | } |
---|
639 | sb.append(sep); |
---|
640 | sb.append("Java "); |
---|
641 | sb.append(System.getProperty("java.version")); |
---|
642 | sb.append(' '); |
---|
643 | sb.append(System.getProperty("java.vendor")); |
---|
644 | sb.append(sep); |
---|
645 | String vm = System.getProperty("java.vm.name"); |
---|
646 | if (vm != null) { |
---|
647 | sb.append(vm); |
---|
648 | sb.append(sep); |
---|
649 | } |
---|
650 | return sb.toString(); |
---|
651 | } |
---|
652 | private static String help() |
---|
653 | { |
---|
654 | final String sep = System.getProperty("line.separator"); |
---|
655 | StringBuilder sb = new StringBuilder("Parameters:"); |
---|
656 | sb.append(sep); |
---|
657 | sb.append("--help").append(sep) |
---|
658 | .append(" Displays this message."); |
---|
659 | sb.append(sep); |
---|
660 | sb.append("--noinform").append(sep) |
---|
661 | .append(" Suppresses the printing of startup information and banner."); |
---|
662 | sb.append(sep); |
---|
663 | sb.append("--noinit").append(sep) |
---|
664 | .append(" Suppresses the loading of the '~/.abclrc' startup file."); |
---|
665 | sb.append(sep); |
---|
666 | sb.append("--nosystem").append(sep) |
---|
667 | .append(" Suppresses loading the 'system.lisp' customization file. "); |
---|
668 | sb.append(sep); |
---|
669 | sb.append("--eval <FORM>").append(sep) |
---|
670 | .append(" Evaluates the <FORM> before initializing REPL."); |
---|
671 | sb.append(sep); |
---|
672 | sb.append("--load <FILE>").append(sep) |
---|
673 | .append(" Loads the file <FILE> before initializing REPL."); |
---|
674 | sb.append(sep); |
---|
675 | sb.append("--load-system-file <FILE>").append(sep) |
---|
676 | .append(" Loads the system file <FILE> before initializing REPL."); |
---|
677 | sb.append(sep); |
---|
678 | sb.append("--batch").append(sep) |
---|
679 | .append(" The process evaluates forms specified by arguments and possibly by those").append(sep) |
---|
680 | .append(" by those in the intialization file '~/.abcl', and then exits."); |
---|
681 | sb.append(sep); |
---|
682 | sb.append(sep); |
---|
683 | sb.append("The occurance of '--' copies the remaining arguments, unprocessed, into").append(sep) |
---|
684 | .append("the variable EXTENSIONS:*COMMAND-LINE-ARGUMENT-LIST*."); |
---|
685 | sb.append(sep); |
---|
686 | |
---|
687 | return sb.toString(); |
---|
688 | } |
---|
689 | } |
---|