1 | /* |
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2 | * Extensions.java |
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3 | * |
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4 | * Copyright (C) 2002-2007 Peter Graves |
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5 | * $Id: Extensions.java 14404 2013-02-26 16:13:50Z 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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.File; |
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39 | import java.io.IOException; |
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40 | import java.util.*; |
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41 | |
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42 | public final class Extensions |
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43 | { |
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44 | // ### *ed-functions* |
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45 | public static final Symbol _ED_FUNCTIONS_ = |
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46 | exportSpecial("*ED-FUNCTIONS*", PACKAGE_EXT, |
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47 | list(intern("DEFAULT-ED-FUNCTION", PACKAGE_SYS))); |
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48 | |
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49 | // ### truly-the value-type form => result* |
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50 | private static final SpecialOperator TRULY_THE = new truly_the(); |
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51 | private static class truly_the extends SpecialOperator { |
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52 | truly_the() { |
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53 | super("truly-the", PACKAGE_EXT, true, "type value"); |
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54 | } |
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55 | @Override |
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56 | public LispObject execute(LispObject args, Environment env) |
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57 | { |
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58 | if (args.length() != 2) |
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59 | return error(new WrongNumberOfArgumentsException(this, 2)); |
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60 | return eval(args.cadr(), env, LispThread.currentThread()); |
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61 | } |
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62 | } |
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63 | |
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64 | // ### neq |
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65 | private static final Primitive NEQ = new neq(); |
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66 | private static class neq extends Primitive |
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67 | { |
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68 | neq() |
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69 | { |
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70 | super(Symbol.NEQ, "obj1 obj2"); |
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71 | } |
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72 | @Override |
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73 | public LispObject execute(LispObject first, LispObject second) |
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74 | { |
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75 | return first != second ? T : NIL; |
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76 | } |
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77 | } |
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78 | |
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79 | // ### memq item list => tail |
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80 | private static final Primitive MEMQ = new memq(); |
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81 | private static class memq extends Primitive |
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82 | { |
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83 | memq() |
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84 | { |
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85 | super(Symbol.MEMQ, "item list"); |
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86 | } |
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87 | @Override |
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88 | public LispObject execute(LispObject item, LispObject list) |
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89 | { |
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90 | while (list instanceof Cons) |
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91 | { |
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92 | if (item == ((Cons)list).car) |
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93 | return list; |
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94 | list = ((Cons)list).cdr; |
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95 | } |
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96 | if (list != NIL) |
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97 | type_error(list, Symbol.LIST); |
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98 | return NIL; |
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99 | } |
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100 | } |
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101 | |
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102 | // ### memql item list => tail |
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103 | private static final Primitive MEMQL = new memql(); |
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104 | private static class memql extends Primitive |
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105 | { |
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106 | memql() { |
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107 | super(Symbol.MEMQL, "item list"); |
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108 | } |
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109 | @Override |
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110 | public LispObject execute(LispObject item, LispObject list) |
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111 | { |
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112 | while (list instanceof Cons) |
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113 | { |
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114 | if (item.eql(((Cons)list).car)) |
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115 | return list; |
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116 | list = ((Cons)list).cdr; |
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117 | } |
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118 | if (list != NIL) |
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119 | type_error(list, Symbol.LIST); |
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120 | return NIL; |
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121 | } |
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122 | } |
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123 | |
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124 | // ### adjoin-eql item list => new-list |
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125 | private static final Primitive ADJOIN_EQL = new adjoin_eql(); |
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126 | private static class adjoin_eql extends Primitive { |
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127 | adjoin_eql() { |
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128 | super(Symbol.ADJOIN_EQL, "item list"); |
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129 | } |
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130 | @Override |
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131 | public LispObject execute(LispObject item, LispObject list) |
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132 | { |
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133 | return memql(item, list) ? list : new Cons(item, list); |
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134 | } |
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135 | } |
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136 | |
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137 | // ### special-variable-p |
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138 | private static final Primitive SPECIAL_VARIABLE_P = new special_variable_p(); |
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139 | private static class special_variable_p extends Primitive { |
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140 | special_variable_p() { |
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141 | super("special-variable-p", PACKAGE_EXT, true); |
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142 | } |
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143 | @Override |
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144 | public LispObject execute(LispObject arg) |
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145 | { |
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146 | return arg.isSpecialVariable() ? T : NIL; |
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147 | } |
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148 | } |
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149 | |
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150 | // ### source symbol |
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151 | private static final Primitive SOURCE = new source(); |
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152 | private static class source extends Primitive { |
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153 | source() { |
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154 | super("source", PACKAGE_EXT, true); |
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155 | } |
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156 | @Override |
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157 | public LispObject execute(LispObject arg) |
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158 | { |
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159 | return get(arg, Symbol._SOURCE, NIL); |
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160 | } |
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161 | } |
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162 | |
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163 | // ### source-file-position symbol |
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164 | private static final Primitive SOURCE_FILE_POSITION = new source_file_position(); |
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165 | private static class source_file_position extends Primitive { |
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166 | source_file_position() { |
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167 | super("source-file-position", PACKAGE_EXT, true); |
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168 | } |
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169 | @Override |
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170 | public LispObject execute(LispObject arg) |
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171 | { |
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172 | LispObject obj = get(arg, Symbol._SOURCE, NIL); |
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173 | if (obj instanceof Cons) |
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174 | return obj.cdr(); |
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175 | return NIL; |
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176 | } |
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177 | } |
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178 | |
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179 | // XXX rename to something else as it doesn't always refer to a pathname. |
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180 | public static final Primitive SOURCE_PATHNAME = new pf_source_pathname(); |
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181 | @DocString( |
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182 | name="source-pathname", |
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183 | args="symbol", |
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184 | doc="Returns either the pathname corresponding to the file from which this symbol was compiled," |
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185 | + "or the keyword :TOP-LEVEL." |
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186 | ) |
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187 | private static class pf_source_pathname extends Primitive { |
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188 | pf_source_pathname() { |
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189 | super("source-pathname", PACKAGE_EXT, true); |
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190 | } |
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191 | @Override |
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192 | public LispObject execute(LispObject arg) |
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193 | { |
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194 | LispObject obj = get(arg, Symbol._SOURCE, NIL); |
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195 | if (obj instanceof Cons) |
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196 | return obj.car(); |
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197 | return obj; |
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198 | } |
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199 | } |
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200 | |
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201 | // ### exit |
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202 | private static final Primitive EXIT = new exit(); |
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203 | private static class exit extends Primitive { |
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204 | exit() { |
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205 | super("exit", PACKAGE_EXT, true, "&key status"); |
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206 | } |
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207 | @Override |
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208 | public LispObject execute() |
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209 | { |
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210 | throw new ProcessingTerminated(); |
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211 | } |
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212 | @Override |
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213 | public LispObject execute(LispObject first, LispObject second) |
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214 | |
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215 | { |
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216 | int status = 0; |
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217 | if (first == Keyword.STATUS) |
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218 | { |
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219 | if (second instanceof Fixnum) |
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220 | status = ((Fixnum)second).value; |
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221 | } |
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222 | throw new ProcessingTerminated(status); |
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223 | } |
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224 | } |
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225 | |
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226 | // ### quit |
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227 | private static final Primitive QUIT = new quit(); |
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228 | private static class quit extends Primitive { |
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229 | quit() { |
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230 | super("quit", PACKAGE_EXT, true, "&key status"); |
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231 | } |
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232 | @Override |
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233 | public LispObject execute() |
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234 | { |
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235 | ((Stream)Symbol.STANDARD_OUTPUT.getSymbolValue())._finishOutput(); |
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236 | ((Stream)Symbol.ERROR_OUTPUT.getSymbolValue())._finishOutput(); |
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237 | throw new ProcessingTerminated(); |
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238 | } |
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239 | @Override |
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240 | public LispObject execute(LispObject first, LispObject second) |
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241 | { |
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242 | int status = 0; |
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243 | if (first == Keyword.STATUS) |
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244 | { |
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245 | if (second instanceof Fixnum) |
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246 | status = ((Fixnum)second).value; |
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247 | } |
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248 | throw new ProcessingTerminated(status); |
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249 | } |
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250 | } |
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251 | |
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252 | // ### dump-java-stack |
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253 | private static final Primitive DUMP_JAVA_STACK = new dump_java_stack(); |
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254 | private static class dump_java_stack extends Primitive { |
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255 | dump_java_stack() { |
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256 | super("dump-java-stack", PACKAGE_EXT, true); |
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257 | } |
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258 | @Override |
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259 | public LispObject execute() |
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260 | { |
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261 | Thread.dumpStack(); |
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262 | return LispThread.currentThread().nothing(); |
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263 | } |
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264 | } |
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265 | |
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266 | public static final Primitive MAKE_TEMP_FILE = new make_temp_file(); |
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267 | @DocString(name="make_temp_file", |
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268 | doc="Create and return the pathname of a previously non-existent file.") |
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269 | private static class make_temp_file extends Primitive { |
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270 | make_temp_file() { |
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271 | super("make-temp-file", PACKAGE_EXT, true, ""); |
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272 | } |
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273 | @Override |
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274 | public LispObject execute() |
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275 | { |
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276 | try |
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277 | { |
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278 | File file = File.createTempFile("abcl", null, null); |
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279 | if (file != null) |
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280 | return new Pathname(file.getPath()); |
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281 | } |
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282 | catch (IOException e) |
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283 | { |
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284 | Debug.trace(e); |
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285 | } |
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286 | return NIL; |
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287 | } |
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288 | } |
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289 | |
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290 | public static final Primitive MAKE_TEMP_DIRECTORY = new make_temp_directory(); |
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291 | @DocString(name="make_temp_directory", |
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292 | doc="Create and return the pathname of a previously non-existent directory.") |
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293 | private static class make_temp_directory extends Primitive { |
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294 | make_temp_directory() { |
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295 | super("make-temp-directory", PACKAGE_EXT, true, ""); |
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296 | } |
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297 | @Override |
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298 | public LispObject execute() |
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299 | { |
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300 | try { |
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301 | File dir = File.createTempFile("abcl", null); |
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302 | dir.delete(); |
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303 | if (dir.mkdirs()) { |
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304 | return new Pathname(dir + "/"); |
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305 | } |
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306 | } catch (Throwable t) { |
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307 | Debug.trace(t); |
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308 | } |
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309 | return NIL; |
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310 | } |
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311 | } |
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312 | |
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313 | // ### interrupt-lisp |
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314 | private static final Primitive INTERRUPT_LISP = new interrupt_lisp(); |
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315 | private static class interrupt_lisp extends Primitive { |
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316 | interrupt_lisp() { |
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317 | super("interrupt-lisp", PACKAGE_EXT, true, ""); |
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318 | } |
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319 | @Override |
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320 | public LispObject execute() |
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321 | { |
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322 | setInterrupted(true); |
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323 | return T; |
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324 | } |
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325 | } |
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326 | |
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327 | // ### getenv variable => string |
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328 | private static final Primitive GETENV = new getenv(); |
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329 | private static class getenv extends Primitive |
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330 | { |
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331 | getenv() |
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332 | { |
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333 | super("getenv", PACKAGE_EXT, true, "variable", |
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334 | "Return the value of the environment VARIABLE if it exists, otherwise return NIL."); |
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335 | } |
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336 | @Override |
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337 | public LispObject execute(LispObject arg) |
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338 | { |
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339 | AbstractString string; |
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340 | if (arg instanceof AbstractString) { |
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341 | string = (AbstractString) arg; |
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342 | } else |
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343 | return type_error(arg, Symbol.STRING); |
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344 | String result = System.getenv(string.getStringValue()); |
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345 | if (result != null) |
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346 | return new SimpleString(result); |
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347 | else |
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348 | return NIL; |
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349 | } |
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350 | } |
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351 | |
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352 | // ### getenv-all variable => string |
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353 | private static final Primitive GETENV_ALL = new getenv_all(); |
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354 | private static class getenv_all extends Primitive |
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355 | { |
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356 | getenv_all() |
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357 | { |
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358 | super("getenv-all", PACKAGE_EXT, true, "variable", |
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359 | "Returns all environment variables as an alist containing (name . value)"); |
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360 | } |
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361 | @Override |
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362 | public LispObject execute() |
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363 | { |
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364 | Cons result = new Cons(NIL); |
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365 | Map<String, String> env = System.getenv(); |
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366 | for (Map.Entry<String, String> entry : env.entrySet()) { |
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367 | Cons entryPair = new Cons(new SimpleString(entry.getKey()), |
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368 | new SimpleString(entry.getValue())); |
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369 | result = new Cons(entryPair, result); |
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370 | } |
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371 | return result; |
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372 | } |
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373 | } |
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374 | |
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375 | } |
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