| 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 14591 2013-12-27 15:58:16Z mevenson $ |
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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 | } |
|---|
| 486 | |
|---|
| 487 | public synchronized void dispose() |
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| 488 | { |
|---|
| 489 | Debug.trace("Interpreter.dispose"); |
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| 490 | Debug.assertTrue(interpreter == this); |
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| 491 | interpreter = null; |
|---|
| 492 | } |
|---|
| 493 | |
|---|
| 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"); |
|---|
| 498 | } |
|---|
| 499 | |
|---|
| 500 | public static final class UnhandledCondition extends Error |
|---|
| 501 | { |
|---|
| 502 | LispObject condition; |
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| 503 | |
|---|
| 504 | UnhandledCondition(LispObject condition) { |
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| 505 | this.condition = condition; |
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| 506 | } |
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| 507 | |
|---|
| 508 | public LispObject getCondition() { |
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| 509 | return condition; |
|---|
| 510 | } |
|---|
| 511 | |
|---|
| 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); |
|---|
| 518 | try { |
|---|
| 519 | conditionText = getCondition().princToString(); |
|---|
| 520 | } catch (Throwable t) { |
|---|
| 521 | conditionText = "<error printing Lisp condition>"; |
|---|
| 522 | } finally { |
|---|
| 523 | thread.resetSpecialBindings(mark); |
|---|
| 524 | } |
|---|
| 525 | |
|---|
| 526 | return "Unhandled lisp condition: " + conditionText; |
|---|
| 527 | } |
|---|
| 528 | |
|---|
| 529 | |
|---|
| 530 | }; |
|---|
| 531 | |
|---|
| 532 | private static final Primitive _DEBUGGER_HOOK_FUNCTION = |
|---|
| 533 | new Primitive("%debugger-hook-function", PACKAGE_SYS, false) |
|---|
| 534 | { |
|---|
| 535 | @Override |
|---|
| 536 | public LispObject execute(LispObject first, LispObject second) |
|---|
| 537 | { |
|---|
| 538 | final LispObject condition = first; |
|---|
| 539 | if (interpreter == null) { |
|---|
| 540 | final LispThread thread = LispThread.currentThread(); |
|---|
| 541 | final SpecialBindingsMark mark = thread.markSpecialBindings(); |
|---|
| 542 | thread.bindSpecial(Symbol.PRINT_ESCAPE, NIL); |
|---|
| 543 | try { |
|---|
| 544 | final LispObject truename = |
|---|
| 545 | Symbol.LOAD_TRUENAME.symbolValue(thread); |
|---|
| 546 | if (truename != NIL) { |
|---|
| 547 | final LispObject stream = |
|---|
| 548 | _LOAD_STREAM_.symbolValue(thread); |
|---|
| 549 | if (stream instanceof Stream) { |
|---|
| 550 | final int lineNumber = |
|---|
| 551 | ((Stream)stream).getLineNumber() + 1; |
|---|
| 552 | final int offset = |
|---|
| 553 | ((Stream)stream).getOffset(); |
|---|
| 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 = null; |
|---|
| 599 | |
|---|
| 600 | final SpecialBindingsMark mark0 = thread.markSpecialBindings(); |
|---|
| 601 | thread.bindSpecial(Symbol.DEBUGGER_HOOK, _DEBUGGER_HOOK_FUNCTION); |
|---|
| 602 | try { // catch possible errors from use of SHARPSIGN_DOT macros in --eval stanzas |
|---|
| 603 | obj = stream.read(false, EOF, false, thread, |
|---|
| 604 | Stream.currentReadtable); |
|---|
| 605 | } finally { |
|---|
| 606 | thread.resetSpecialBindings(mark0); |
|---|
| 607 | } |
|---|
| 608 | if (obj == EOF) |
|---|
| 609 | return error(new EndOfFile(stream)); |
|---|
| 610 | |
|---|
| 611 | final SpecialBindingsMark mark = thread.markSpecialBindings(); |
|---|
| 612 | thread.bindSpecial(Symbol.DEBUGGER_HOOK, _DEBUGGER_HOOK_FUNCTION); |
|---|
| 613 | try { |
|---|
| 614 | return Lisp.eval(obj, new Environment(), thread); |
|---|
| 615 | } |
|---|
| 616 | finally { |
|---|
| 617 | thread.resetSpecialBindings(mark); |
|---|
| 618 | } |
|---|
| 619 | } |
|---|
| 620 | |
|---|
| 621 | private static final String build; |
|---|
| 622 | |
|---|
| 623 | static { |
|---|
| 624 | String s = null; |
|---|
| 625 | InputStream in = Interpreter.class.getResourceAsStream("build"); |
|---|
| 626 | if (in != null) { |
|---|
| 627 | try { |
|---|
| 628 | BufferedReader reader = |
|---|
| 629 | new BufferedReader(new InputStreamReader(in)); |
|---|
| 630 | s = reader.readLine(); |
|---|
| 631 | reader.close(); |
|---|
| 632 | } |
|---|
| 633 | catch (IOException e) {} |
|---|
| 634 | } |
|---|
| 635 | build = s; |
|---|
| 636 | } |
|---|
| 637 | |
|---|
| 638 | private static String banner() |
|---|
| 639 | { |
|---|
| 640 | final String sep = System.getProperty("line.separator"); |
|---|
| 641 | StringBuilder sb = new StringBuilder("Armed Bear Common Lisp "); |
|---|
| 642 | sb.append(Version.getVersion()); |
|---|
| 643 | if (build != null) { |
|---|
| 644 | sb.append(" (built "); |
|---|
| 645 | sb.append(build); |
|---|
| 646 | sb.append(')'); |
|---|
| 647 | } |
|---|
| 648 | sb.append(sep); |
|---|
| 649 | sb.append("Java "); |
|---|
| 650 | sb.append(System.getProperty("java.version")); |
|---|
| 651 | sb.append(' '); |
|---|
| 652 | sb.append(System.getProperty("java.vendor")); |
|---|
| 653 | sb.append(sep); |
|---|
| 654 | String vm = System.getProperty("java.vm.name"); |
|---|
| 655 | if (vm != null) { |
|---|
| 656 | sb.append(vm); |
|---|
| 657 | sb.append(sep); |
|---|
| 658 | } |
|---|
| 659 | return sb.toString(); |
|---|
| 660 | } |
|---|
| 661 | private static String help() |
|---|
| 662 | { |
|---|
| 663 | final String sep = System.getProperty("line.separator"); |
|---|
| 664 | StringBuilder sb = new StringBuilder("Parameters:"); |
|---|
| 665 | sb.append(sep); |
|---|
| 666 | sb.append("--help").append(sep) |
|---|
| 667 | .append(" Displays this message."); |
|---|
| 668 | sb.append(sep); |
|---|
| 669 | sb.append("--noinform").append(sep) |
|---|
| 670 | .append(" Suppresses the printing of startup information and banner."); |
|---|
| 671 | sb.append(sep); |
|---|
| 672 | sb.append("--noinit").append(sep) |
|---|
| 673 | .append(" Suppresses the loading of the '~/.abclrc' startup file."); |
|---|
| 674 | sb.append(sep); |
|---|
| 675 | sb.append("--nosystem").append(sep) |
|---|
| 676 | .append(" Suppresses loading the 'system.lisp' customization file. "); |
|---|
| 677 | sb.append(sep); |
|---|
| 678 | sb.append("--eval <FORM>").append(sep) |
|---|
| 679 | .append(" Evaluates the <FORM> before initializing REPL."); |
|---|
| 680 | sb.append(sep); |
|---|
| 681 | sb.append("--load <FILE>").append(sep) |
|---|
| 682 | .append(" Loads the file <FILE> before initializing REPL."); |
|---|
| 683 | sb.append(sep); |
|---|
| 684 | sb.append("--load-system-file <FILE>").append(sep) |
|---|
| 685 | .append(" Loads the system file <FILE> before initializing REPL."); |
|---|
| 686 | sb.append(sep); |
|---|
| 687 | sb.append("--batch").append(sep) |
|---|
| 688 | .append(" The process evaluates forms specified by arguments and possibly by those").append(sep) |
|---|
| 689 | .append(" by those in the intialization file '~/.abcl', and then exits."); |
|---|
| 690 | sb.append(sep); |
|---|
| 691 | sb.append(sep); |
|---|
| 692 | sb.append("The occurance of '--' copies the remaining arguments, unprocessed, into").append(sep) |
|---|
| 693 | .append("the variable EXTENSIONS:*COMMAND-LINE-ARGUMENT-LIST*."); |
|---|
| 694 | sb.append(sep); |
|---|
| 695 | |
|---|
| 696 | return sb.toString(); |
|---|
| 697 | } |
|---|
| 698 | } |
|---|