1 | /* |
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2 | * StructureObject.java |
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3 | * |
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4 | * Copyright (C) 2003-2006 Peter Graves |
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5 | * $Id: StructureObject.java 12756 2010-06-17 20:14:10Z astalla $ |
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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 | public class StructureObject extends LispObject |
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39 | { |
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40 | private final StructureClass structureClass; |
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41 | final LispObject[] slots; |
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42 | |
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43 | public StructureObject(Symbol symbol) |
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44 | |
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45 | { |
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46 | structureClass = (StructureClass) LispClass.findClass(symbol/*, true*/); // Might return null. |
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47 | if (structureClass == null) { |
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48 | System.err.println("No mitens sitten: " + BuiltInClass.SYSTEM_STREAM.toString()); |
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49 | System.err.println("joopa joo:" + Symbol.SYSTEM_STREAM.name); |
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50 | System.err.println("Oh noes, structure object got a null class:" + symbol.toString() + ", symbol name:" + symbol.name ); |
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51 | } |
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52 | slots = new LispObject[0]; |
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53 | } |
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54 | |
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55 | public StructureObject(Symbol symbol, LispObject[] slots) |
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56 | |
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57 | { |
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58 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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59 | this.slots = slots; |
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60 | } |
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61 | |
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62 | public StructureObject(Symbol symbol, LispObject obj0) |
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63 | |
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64 | { |
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65 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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66 | LispObject[] slots = new LispObject[1]; |
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67 | slots[0] = obj0; |
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68 | this.slots = slots; |
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69 | } |
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70 | |
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71 | public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1) |
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72 | |
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73 | { |
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74 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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75 | LispObject[] slots = new LispObject[2]; |
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76 | slots[0] = obj0; |
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77 | slots[1] = obj1; |
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78 | this.slots = slots; |
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79 | } |
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80 | |
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81 | public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1, |
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82 | LispObject obj2) |
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83 | |
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84 | { |
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85 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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86 | LispObject[] slots = new LispObject[3]; |
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87 | slots[0] = obj0; |
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88 | slots[1] = obj1; |
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89 | slots[2] = obj2; |
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90 | this.slots = slots; |
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91 | } |
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92 | |
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93 | public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1, |
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94 | LispObject obj2, LispObject obj3) |
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95 | |
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96 | { |
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97 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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98 | LispObject[] slots = new LispObject[4]; |
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99 | slots[0] = obj0; |
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100 | slots[1] = obj1; |
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101 | slots[2] = obj2; |
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102 | slots[3] = obj3; |
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103 | this.slots = slots; |
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104 | } |
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105 | |
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106 | public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1, |
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107 | LispObject obj2, LispObject obj3, LispObject obj4) |
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108 | |
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109 | { |
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110 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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111 | LispObject[] slots = new LispObject[5]; |
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112 | slots[0] = obj0; |
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113 | slots[1] = obj1; |
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114 | slots[2] = obj2; |
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115 | slots[3] = obj3; |
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116 | slots[4] = obj4; |
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117 | this.slots = slots; |
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118 | } |
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119 | |
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120 | public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1, |
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121 | LispObject obj2, LispObject obj3, LispObject obj4, |
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122 | LispObject obj5) |
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123 | |
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124 | { |
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125 | structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null. |
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126 | LispObject[] slots = new LispObject[6]; |
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127 | slots[0] = obj0; |
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128 | slots[1] = obj1; |
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129 | slots[2] = obj2; |
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130 | slots[3] = obj3; |
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131 | slots[4] = obj4; |
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132 | slots[5] = obj5; |
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133 | this.slots = slots; |
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134 | } |
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135 | |
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136 | public StructureObject(StructureObject obj) |
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137 | { |
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138 | this.structureClass = obj.structureClass; |
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139 | slots = new LispObject[obj.slots.length]; |
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140 | for (int i = slots.length; i-- > 0;) |
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141 | slots[i] = obj.slots[i]; |
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142 | } |
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143 | |
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144 | @Override |
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145 | public LispObject typeOf() |
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146 | { |
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147 | return structureClass.getName(); |
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148 | } |
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149 | |
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150 | @Override |
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151 | public LispObject classOf() |
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152 | { |
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153 | return structureClass; |
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154 | } |
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155 | |
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156 | protected int getSlotIndex(LispObject slotName) { |
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157 | LispObject effectiveSlots = structureClass.getSlotDefinitions(); |
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158 | LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray(); |
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159 | for (int i = 0; i < slots.length; i++) { |
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160 | SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i]; |
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161 | LispObject candidateSlotName = slotDefinition.AREF(1); |
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162 | if(slotName == candidateSlotName) { |
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163 | return i; |
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164 | } |
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165 | } |
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166 | return -1; |
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167 | } |
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168 | |
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169 | @Override |
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170 | public LispObject SLOT_VALUE(LispObject slotName) |
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171 | { |
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172 | LispObject value; |
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173 | final int index = getSlotIndex(slotName); |
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174 | if (index >= 0) { |
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175 | value = slots[index]; |
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176 | } else { |
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177 | value = UNBOUND_VALUE; |
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178 | value = Symbol.SLOT_UNBOUND.execute(structureClass, this, slotName); |
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179 | LispThread.currentThread()._values = null; |
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180 | } |
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181 | return value; |
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182 | } |
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183 | |
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184 | public void setSlotValue(LispObject slotName, LispObject newValue) { |
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185 | final int index = getSlotIndex(slotName); |
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186 | if (index >= 0) { |
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187 | slots[index] = newValue; |
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188 | } else { |
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189 | LispObject[] args = new LispObject[5]; |
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190 | args[0] = structureClass; |
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191 | args[1] = this; |
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192 | args[2] = slotName; |
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193 | args[3] = Symbol.SETF; |
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194 | args[4] = newValue; |
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195 | Symbol.SLOT_MISSING.execute(args); |
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196 | } |
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197 | } |
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198 | |
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199 | @Override |
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200 | public LispObject getParts() |
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201 | { |
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202 | LispObject result = NIL; |
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203 | result = result.push(new Cons("class", structureClass)); |
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204 | LispObject effectiveSlots = structureClass.getSlotDefinitions(); |
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205 | LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray(); |
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206 | Debug.assertTrue(effectiveSlotsArray.length == slots.length); |
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207 | for (int i = 0; i < slots.length; i++) |
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208 | { |
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209 | SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i]; |
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210 | LispObject slotName = slotDefinition.AREF(1); |
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211 | result = result.push(new Cons(slotName, slots[i])); |
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212 | } |
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213 | return result.nreverse(); |
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214 | } |
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215 | |
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216 | @Override |
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217 | public LispObject typep(LispObject type) |
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218 | { |
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219 | if (type instanceof StructureClass) |
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220 | return memq(type, structureClass.getCPL()) ? T : NIL; |
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221 | if (type == structureClass.getName()) |
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222 | return T; |
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223 | if (type == Symbol.STRUCTURE_OBJECT) |
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224 | return T; |
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225 | if (type == BuiltInClass.STRUCTURE_OBJECT) |
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226 | return T; |
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227 | if (type instanceof Symbol) |
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228 | { |
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229 | LispClass c = LispClass.findClass((Symbol)type); |
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230 | if (c != null) |
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231 | return memq(c, structureClass.getCPL()) ? T : NIL; |
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232 | } |
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233 | return super.typep(type); |
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234 | } |
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235 | |
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236 | @Override |
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237 | public boolean equalp(LispObject obj) |
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238 | { |
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239 | if (this == obj) |
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240 | return true; |
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241 | if (obj instanceof StructureObject) |
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242 | { |
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243 | StructureObject o = (StructureObject) obj; |
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244 | if (structureClass != o.structureClass) |
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245 | return false; |
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246 | for (int i = 0; i < slots.length; i++) |
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247 | { |
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248 | if (!slots[i].equalp(o.slots[i])) |
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249 | return false; |
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250 | } |
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251 | return true; |
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252 | } |
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253 | return false; |
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254 | } |
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255 | |
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256 | @Override |
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257 | public LispObject getSlotValue_0() |
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258 | { |
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259 | try |
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260 | { |
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261 | return slots[0]; |
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262 | } |
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263 | catch (ArrayIndexOutOfBoundsException e) |
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264 | { |
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265 | return badIndex(0); |
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266 | } |
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267 | } |
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268 | |
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269 | @Override |
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270 | public LispObject getSlotValue_1() |
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271 | { |
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272 | try |
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273 | { |
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274 | return slots[1]; |
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275 | } |
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276 | catch (ArrayIndexOutOfBoundsException e) |
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277 | { |
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278 | return badIndex(1); |
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279 | } |
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280 | } |
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281 | |
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282 | @Override |
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283 | public LispObject getSlotValue_2() |
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284 | { |
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285 | try |
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286 | { |
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287 | return slots[2]; |
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288 | } |
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289 | catch (ArrayIndexOutOfBoundsException e) |
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290 | { |
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291 | return badIndex(2); |
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292 | } |
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293 | } |
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294 | |
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295 | @Override |
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296 | public LispObject getSlotValue_3() |
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297 | { |
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298 | try |
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299 | { |
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300 | return slots[3]; |
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301 | } |
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302 | catch (ArrayIndexOutOfBoundsException e) |
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303 | { |
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304 | return badIndex(3); |
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305 | } |
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306 | } |
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307 | |
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308 | @Override |
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309 | public LispObject getSlotValue(int index) |
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310 | { |
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311 | try |
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312 | { |
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313 | return slots[index]; |
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314 | } |
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315 | catch (ArrayIndexOutOfBoundsException e) |
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316 | { |
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317 | return badIndex(index); |
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318 | } |
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319 | } |
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320 | |
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321 | @Override |
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322 | public int getFixnumSlotValue(int index) |
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323 | { |
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324 | try |
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325 | { |
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326 | return Fixnum.getValue(slots[index]); |
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327 | } |
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328 | catch (ArrayIndexOutOfBoundsException e) |
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329 | { |
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330 | badIndex(index); |
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331 | // Not reached. |
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332 | return 0; |
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333 | } |
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334 | } |
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335 | |
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336 | @Override |
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337 | public boolean getSlotValueAsBoolean(int index) |
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338 | { |
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339 | try |
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340 | { |
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341 | return slots[index] != NIL ? true : false; |
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342 | } |
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343 | catch (ArrayIndexOutOfBoundsException e) |
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344 | { |
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345 | badIndex(index); |
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346 | // Not reached. |
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347 | return false; |
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348 | } |
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349 | } |
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350 | |
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351 | @Override |
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352 | public void setSlotValue_0(LispObject value) |
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353 | |
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354 | { |
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355 | try |
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356 | { |
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357 | slots[0] = value; |
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358 | } |
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359 | catch (ArrayIndexOutOfBoundsException e) |
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360 | { |
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361 | badIndex(0); |
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362 | } |
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363 | } |
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364 | |
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365 | @Override |
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366 | public void setSlotValue_1(LispObject value) |
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367 | |
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368 | { |
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369 | try |
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370 | { |
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371 | slots[1] = value; |
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372 | } |
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373 | catch (ArrayIndexOutOfBoundsException e) |
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374 | { |
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375 | badIndex(1); |
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376 | } |
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377 | } |
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378 | |
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379 | @Override |
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380 | public void setSlotValue_2(LispObject value) |
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381 | |
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382 | { |
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383 | try |
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384 | { |
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385 | slots[2] = value; |
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386 | } |
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387 | catch (ArrayIndexOutOfBoundsException e) |
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388 | { |
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389 | badIndex(2); |
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390 | } |
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391 | } |
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392 | |
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393 | @Override |
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394 | public void setSlotValue_3(LispObject value) |
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395 | |
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396 | { |
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397 | try |
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398 | { |
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399 | slots[3] = value; |
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400 | } |
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401 | catch (ArrayIndexOutOfBoundsException e) |
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402 | { |
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403 | badIndex(3); |
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404 | } |
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405 | } |
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406 | |
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407 | @Override |
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408 | public void setSlotValue(int index, LispObject value) |
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409 | |
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410 | { |
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411 | try |
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412 | { |
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413 | slots[index] = value; |
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414 | } |
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415 | catch (ArrayIndexOutOfBoundsException e) |
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416 | { |
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417 | badIndex(index); |
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418 | } |
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419 | } |
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420 | |
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421 | private LispObject badIndex(int n) |
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422 | { |
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423 | StringBuilder sb = new StringBuilder("Invalid slot index "); |
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424 | sb.append(Fixnum.getInstance(n).writeToString()); |
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425 | sb.append(" for "); |
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426 | sb.append(writeToString()); |
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427 | return error(new LispError(sb.toString())); |
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428 | } |
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429 | |
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430 | @Override |
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431 | public final int psxhash() |
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432 | { |
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433 | return psxhash(4); |
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434 | } |
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435 | |
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436 | @Override |
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437 | public final int psxhash(int depth) |
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438 | { |
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439 | int result = mix(structureClass.sxhash(), 7814971); |
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440 | if (depth > 0) |
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441 | { |
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442 | int limit = slots.length; |
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443 | if (limit > 4) |
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444 | limit = 4; |
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445 | for (int i = 0; i < limit; i++) |
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446 | result = mix(slots[i].psxhash(depth - 1), result); |
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447 | } |
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448 | return result & 0x7fffffff; |
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449 | } |
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450 | |
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451 | @Override |
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452 | public String writeToString() |
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453 | { |
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454 | try |
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455 | { |
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456 | final LispThread thread = LispThread.currentThread(); |
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457 | // FIXME |
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458 | if (typep(Symbol.RESTART) != NIL) |
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459 | { |
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460 | Symbol PRINT_RESTART = PACKAGE_SYS.intern("PRINT-RESTART"); |
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461 | LispObject fun = PRINT_RESTART.getSymbolFunction(); |
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462 | StringOutputStream stream = new StringOutputStream(); |
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463 | thread.execute(fun, this, stream); |
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464 | return stream.getString().getStringValue(); |
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465 | } |
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466 | if (_PRINT_STRUCTURE_.symbolValue(thread) == NIL) |
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467 | return unreadableString(structureClass.getName().writeToString()); |
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468 | int maxLevel = Integer.MAX_VALUE; |
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469 | LispObject printLevel = Symbol.PRINT_LEVEL.symbolValue(thread); |
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470 | if (printLevel instanceof Fixnum) |
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471 | maxLevel = ((Fixnum)printLevel).value; |
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472 | LispObject currentPrintLevel = |
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473 | _CURRENT_PRINT_LEVEL_.symbolValue(thread); |
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474 | int currentLevel = Fixnum.getValue(currentPrintLevel); |
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475 | if (currentLevel >= maxLevel && slots.length > 0) |
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476 | return "#"; |
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477 | StringBuilder sb = new StringBuilder("#S("); |
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478 | sb.append(structureClass.getName().writeToString()); |
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479 | if (currentLevel < maxLevel) |
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480 | { |
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481 | LispObject effectiveSlots = structureClass.getSlotDefinitions(); |
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482 | LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray(); |
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483 | Debug.assertTrue(effectiveSlotsArray.length == slots.length); |
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484 | final LispObject printLength = Symbol.PRINT_LENGTH.symbolValue(thread); |
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485 | final int limit; |
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486 | if (printLength instanceof Fixnum) |
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487 | limit = Math.min(slots.length, ((Fixnum)printLength).value); |
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488 | else |
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489 | limit = slots.length; |
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490 | final boolean printCircle = |
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491 | (Symbol.PRINT_CIRCLE.symbolValue(thread) != NIL); |
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492 | for (int i = 0; i < limit; i++) |
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493 | { |
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494 | sb.append(' '); |
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495 | SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i]; |
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496 | // FIXME AREF(1) |
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497 | LispObject slotName = slotDefinition.AREF(1); |
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498 | Debug.assertTrue(slotName instanceof Symbol); |
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499 | sb.append(':'); |
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500 | sb.append(((Symbol)slotName).name.getStringValue()); |
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501 | sb.append(' '); |
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502 | if (printCircle) |
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503 | { |
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504 | StringOutputStream stream = new StringOutputStream(); |
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505 | thread.execute(Symbol.OUTPUT_OBJECT.getSymbolFunction(), |
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506 | slots[i], stream); |
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507 | sb.append(stream.getString().getStringValue()); |
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508 | } |
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509 | else |
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510 | sb.append(slots[i].writeToString()); |
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511 | } |
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512 | if (limit < slots.length) |
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513 | sb.append(" ..."); |
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514 | } |
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515 | sb.append(')'); |
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516 | return sb.toString(); |
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517 | } |
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518 | catch (StackOverflowError e) |
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519 | { |
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520 | error(new StorageCondition("Stack overflow.")); |
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521 | return null; // Not reached. |
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522 | } |
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523 | } |
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524 | |
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525 | // ### structure-object-p object => generalized-boolean |
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526 | private static final Primitive STRUCTURE_OBJECT_P = |
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527 | new Primitive("structure-object-p", PACKAGE_SYS, true, "object") |
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528 | { |
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529 | @Override |
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530 | public LispObject execute(LispObject arg) |
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531 | { |
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532 | return arg instanceof StructureObject ? T : NIL; |
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533 | } |
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534 | }; |
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535 | |
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536 | // ### structure-length instance => length |
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537 | private static final Primitive STRUCTURE_LENGTH = |
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538 | new Primitive("structure-length", PACKAGE_SYS, true, "instance") |
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539 | { |
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540 | @Override |
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541 | public LispObject execute(LispObject arg) |
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542 | { |
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543 | if (arg instanceof StructureObject) |
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544 | return Fixnum.getInstance(((StructureObject)arg).slots.length); |
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545 | return type_error(arg, Symbol.STRUCTURE_OBJECT); |
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546 | } |
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547 | }; |
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548 | |
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549 | // ### structure-ref instance index => value |
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550 | private static final Primitive STRUCTURE_REF = |
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551 | new Primitive("structure-ref", PACKAGE_SYS, true) |
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552 | { |
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553 | @Override |
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554 | public LispObject execute(LispObject first, LispObject second) |
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555 | |
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556 | { |
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557 | if (first instanceof StructureObject) |
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558 | try |
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559 | { |
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560 | return ((StructureObject)first).slots[Fixnum.getValue(second)]; |
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561 | } |
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562 | catch (ArrayIndexOutOfBoundsException e) |
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563 | { |
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564 | // Shouldn't happen. |
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565 | return error(new LispError("Internal error.")); |
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566 | } |
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567 | return type_error(first, Symbol.STRUCTURE_OBJECT); |
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568 | } |
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569 | }; |
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570 | |
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571 | // ### structure-set instance index new-value => new-value |
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572 | private static final Primitive STRUCTURE_SET = |
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573 | new Primitive("structure-set", PACKAGE_SYS, true) |
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574 | { |
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575 | @Override |
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576 | public LispObject execute(LispObject first, LispObject second, |
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577 | LispObject third) |
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578 | |
---|
579 | { |
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580 | |
---|
581 | if (first instanceof StructureObject) |
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582 | try |
---|
583 | { |
---|
584 | ((StructureObject)first).slots[Fixnum.getValue(second)] = third; |
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585 | return third; |
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586 | } |
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587 | catch (ArrayIndexOutOfBoundsException e) |
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588 | { |
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589 | // Shouldn't happen. |
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590 | return error(new LispError("Internal error.")); |
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591 | } |
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592 | return type_error(first, Symbol.STRUCTURE_OBJECT); |
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593 | } |
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594 | }; |
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595 | |
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596 | // ### make-structure |
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597 | private static final Primitive MAKE_STRUCTURE = |
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598 | new Primitive("make-structure", PACKAGE_SYS, true) |
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599 | { |
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600 | @Override |
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601 | public LispObject execute(LispObject first, LispObject second) |
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602 | |
---|
603 | { |
---|
604 | return new StructureObject(checkSymbol(first), second); |
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605 | } |
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606 | @Override |
---|
607 | public LispObject execute(LispObject first, LispObject second, |
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608 | LispObject third) |
---|
609 | |
---|
610 | { |
---|
611 | return new StructureObject(checkSymbol(first), second, third); |
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612 | } |
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613 | @Override |
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614 | public LispObject execute(LispObject first, LispObject second, |
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615 | LispObject third, LispObject fourth) |
---|
616 | |
---|
617 | { |
---|
618 | return new StructureObject(checkSymbol(first), second, third, fourth); |
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619 | } |
---|
620 | @Override |
---|
621 | public LispObject execute(LispObject first, LispObject second, |
---|
622 | LispObject third, LispObject fourth, |
---|
623 | LispObject fifth) |
---|
624 | |
---|
625 | { |
---|
626 | return new StructureObject(checkSymbol(first), second, third, fourth, |
---|
627 | fifth); |
---|
628 | } |
---|
629 | @Override |
---|
630 | public LispObject execute(LispObject first, LispObject second, |
---|
631 | LispObject third, LispObject fourth, |
---|
632 | LispObject fifth, LispObject sixth) |
---|
633 | |
---|
634 | { |
---|
635 | return new StructureObject(checkSymbol(first), second, third, fourth, |
---|
636 | fifth, sixth); |
---|
637 | } |
---|
638 | @Override |
---|
639 | public LispObject execute(LispObject first, LispObject second, |
---|
640 | LispObject third, LispObject fourth, |
---|
641 | LispObject fifth, LispObject sixth, |
---|
642 | LispObject seventh) |
---|
643 | |
---|
644 | { |
---|
645 | return new StructureObject(checkSymbol(first), second, third, fourth, |
---|
646 | fifth, sixth, seventh); |
---|
647 | } |
---|
648 | }; |
---|
649 | |
---|
650 | // ### %make-structure name slot-values => object |
---|
651 | private static final Primitive _MAKE_STRUCTURE = |
---|
652 | new Primitive("%make-structure", PACKAGE_SYS, true) |
---|
653 | { |
---|
654 | @Override |
---|
655 | public LispObject execute(LispObject first, LispObject second) |
---|
656 | |
---|
657 | { |
---|
658 | return new StructureObject(checkSymbol(first), second.copyToArray()); |
---|
659 | } |
---|
660 | }; |
---|
661 | |
---|
662 | // ### copy-structure structure => copy |
---|
663 | private static final Primitive COPY_STRUCTURE = |
---|
664 | new Primitive(Symbol.COPY_STRUCTURE, "structure") |
---|
665 | { |
---|
666 | @Override |
---|
667 | public LispObject execute(LispObject arg) |
---|
668 | { |
---|
669 | if (arg instanceof StructureObject) |
---|
670 | return new StructureObject((StructureObject)arg); |
---|
671 | return type_error(arg, Symbol.STRUCTURE_OBJECT); |
---|
672 | } |
---|
673 | }; |
---|
674 | } |
---|