1 | /* |
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2 | * HashTableFunctions.java |
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3 | * |
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4 | * Copyright (C) 2002-2006 Peter Graves |
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5 | * $Id: HashTableFunctions.java 13440 2011-08-05 21:25:10Z ehuelsmann $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | public final class HashTableFunctions |
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39 | { |
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40 | static final LispObject FUNCTION_EQ = |
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41 | Symbol.EQ.getSymbolFunction(); |
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42 | static final LispObject FUNCTION_EQL = |
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43 | Symbol.EQL.getSymbolFunction(); |
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44 | static final LispObject FUNCTION_EQUAL = |
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45 | Symbol.EQUAL.getSymbolFunction(); |
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46 | static final LispObject FUNCTION_EQUALP = |
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47 | Symbol.EQUALP.getSymbolFunction(); |
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48 | |
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49 | private static final Primitive _MAKE_HASH_TABLE |
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50 | = new pf__make_hash_table(); |
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51 | @DocString(name="%make-hash-table") |
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52 | private static final class pf__make_hash_table extends Primitive { |
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53 | pf__make_hash_table() { |
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54 | super("%make-hash-table", PACKAGE_SYS, false); |
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55 | } |
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56 | |
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57 | @Override |
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58 | public LispObject execute(LispObject test, LispObject size, |
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59 | LispObject rehashSize, |
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60 | LispObject rehashThreshold) |
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61 | { |
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62 | final int n = Fixnum.getValue(size); |
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63 | if (test == FUNCTION_EQL || test == NIL) |
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64 | return HashTable.newEqlHashTable(n, rehashSize, rehashThreshold); |
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65 | if (test == FUNCTION_EQ) |
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66 | return HashTable.newEqHashTable(n, rehashSize, rehashThreshold); |
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67 | if (test == FUNCTION_EQUAL) |
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68 | return HashTable.newEqualHashTable(n, rehashSize, rehashThreshold); |
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69 | if (test == FUNCTION_EQUALP) |
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70 | return HashTable.newEqualpHashTable(n, rehashSize, rehashThreshold); |
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71 | return error(new LispError("Unsupported test for MAKE-HASH-TABLE: " + |
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72 | test.princToString())); |
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73 | } |
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74 | }; |
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75 | |
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76 | |
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77 | private static final Primitive _MAKE_WEAK_HASH_TABLE |
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78 | = new pf__make_weak_hash_table(); |
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79 | @DocString(name="%make-weak-hash-table") |
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80 | private static final class pf__make_weak_hash_table extends Primitive { |
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81 | pf__make_weak_hash_table() { |
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82 | super("%make-weak-hash-table", PACKAGE_SYS, false); |
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83 | } |
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84 | @Override |
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85 | public LispObject execute(LispObject test, |
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86 | LispObject size, |
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87 | LispObject rehashSize, |
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88 | LispObject rehashThreshold, |
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89 | LispObject weakness) |
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90 | { |
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91 | final int n = Fixnum.getValue(size); |
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92 | if (test == FUNCTION_EQL || test == NIL) |
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93 | return WeakHashTable.newEqlHashTable(n, rehashSize, |
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94 | rehashThreshold, weakness); |
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95 | if (test == FUNCTION_EQ) |
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96 | return WeakHashTable.newEqHashTable(n, rehashSize, |
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97 | rehashThreshold, weakness); |
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98 | if (test == FUNCTION_EQUAL) |
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99 | return WeakHashTable.newEqualHashTable(n, rehashSize, |
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100 | rehashThreshold, weakness); |
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101 | if (test == FUNCTION_EQUALP) |
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102 | return WeakHashTable.newEqualpHashTable(n, rehashSize, |
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103 | rehashThreshold, weakness); |
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104 | return error(new LispError("Unsupported test for MAKE-HASH-TABLE: " + |
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105 | test.princToString())); |
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106 | } |
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107 | }; |
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108 | |
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109 | private static final Primitive GETHASH |
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110 | = new pf_gethash(); |
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111 | @DocString(name="gethash", |
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112 | args="key hash-table &optional default", |
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113 | returns="value, present-p", |
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114 | doc="Returns the value associated with KEY in HASH-TABLE.") |
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115 | private static final class pf_gethash extends Primitive { |
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116 | pf_gethash() { |
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117 | super(Symbol.GETHASH, "key hash-table &optional default"); |
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118 | } |
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119 | |
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120 | @Override |
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121 | public LispObject execute(LispObject key, LispObject ht) |
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122 | |
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123 | { |
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124 | if (ht instanceof WeakHashTable) { |
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125 | return ((WeakHashTable)ht).gethash(key); |
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126 | } |
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127 | return checkHashTable(ht).gethash(key); |
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128 | } |
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129 | |
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130 | @Override |
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131 | public LispObject execute(LispObject key, LispObject ht, |
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132 | LispObject defaultValue) |
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133 | { |
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134 | if (ht instanceof WeakHashTable) { |
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135 | return ((WeakHashTable)ht).gethash(key, defaultValue); |
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136 | } |
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137 | return checkHashTable(ht).gethash(key, defaultValue); |
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138 | } |
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139 | }; |
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140 | |
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141 | private static final Primitive GETHASH1 |
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142 | = new pf_gethash1(); |
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143 | @DocString(name="gethash1", |
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144 | args="key hash-table", returns="value") |
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145 | private static final class pf_gethash1 extends Primitive { |
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146 | pf_gethash1() { |
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147 | super(Symbol.GETHASH1, "key hash-table"); |
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148 | } |
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149 | @Override |
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150 | public LispObject execute(LispObject first, LispObject second) { |
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151 | if (second instanceof WeakHashTable) { |
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152 | final WeakHashTable ht = (WeakHashTable) second; |
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153 | synchronized (ht) { |
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154 | final LispObject value = ht.get(first); |
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155 | return value != null ? value : NIL; |
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156 | } |
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157 | } else { |
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158 | final HashTable ht = checkHashTable(second); |
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159 | synchronized (ht) { |
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160 | final LispObject value = ht.get(first); |
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161 | return value != null ? value : NIL; |
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162 | } |
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163 | } |
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164 | } |
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165 | }; |
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166 | |
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167 | private static final Primitive PUTHASH |
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168 | = new pf_puthash(); |
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169 | @DocString(name="puthash", |
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170 | args="key hash-table new-value &optional default", returns="value") |
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171 | private static final class pf_puthash extends Primitive { |
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172 | pf_puthash() { |
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173 | super(Symbol.PUTHASH, |
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174 | "key hash-table new-value &optional default"); |
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175 | } |
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176 | @Override |
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177 | public LispObject execute(LispObject key, LispObject ht, |
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178 | LispObject value) |
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179 | { |
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180 | if (ht instanceof WeakHashTable) { |
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181 | return ((WeakHashTable)ht).puthash(key, value); |
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182 | } |
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183 | return checkHashTable(ht).puthash(key, value); |
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184 | } |
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185 | @Override |
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186 | public LispObject execute(LispObject key, LispObject ht, |
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187 | LispObject ignored, LispObject value) |
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188 | { |
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189 | if (ht instanceof WeakHashTable) { |
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190 | return ((WeakHashTable)ht).puthash(key, value); |
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191 | } |
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192 | return checkHashTable(ht).puthash(key, value); |
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193 | } |
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194 | }; |
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195 | |
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196 | private static final Primitive REMHASH |
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197 | = new pf_remhash(); |
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198 | @DocString(name="remhash", |
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199 | args="key hash-table", returns="generalized-boolean", |
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200 | doc="Removes the value for KEY in HASH-TABLE, if any.") |
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201 | private static final class pf_remhash extends Primitive { |
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202 | pf_remhash() { |
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203 | super(Symbol.REMHASH, "key hash-table"); |
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204 | } |
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205 | @Override |
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206 | public LispObject execute(LispObject key, LispObject ht) { |
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207 | if (ht instanceof WeakHashTable) { |
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208 | return ((WeakHashTable)ht).remhash(key); |
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209 | } |
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210 | return checkHashTable(ht).remhash(key); |
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211 | } |
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212 | }; |
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213 | |
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214 | private static final Primitive CLRHASH |
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215 | = new pf_clrhash(); |
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216 | @DocString(name="clrhash", |
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217 | args="hash-table", returns="hash-table") |
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218 | private static final class pf_clrhash extends Primitive { |
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219 | pf_clrhash() { |
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220 | super(Symbol.CLRHASH, "hash-table"); |
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221 | } |
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222 | @Override |
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223 | public LispObject execute(LispObject ht) |
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224 | { |
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225 | if (ht instanceof WeakHashTable) { |
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226 | ((WeakHashTable)ht).clear(); |
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227 | return ht; |
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228 | } |
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229 | checkHashTable(ht).clear(); |
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230 | return ht; |
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231 | } |
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232 | }; |
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233 | |
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234 | private static final Primitive HASH_TABLE_COUNT |
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235 | = new pf_hash_table_count(); |
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236 | @DocString(name="hash-table-count", |
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237 | args="hash-table", |
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238 | doc="Returns the number of entries in HASH-TABLE.") |
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239 | private static final class pf_hash_table_count extends Primitive { |
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240 | pf_hash_table_count() { |
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241 | super(Symbol.HASH_TABLE_COUNT, "hash-table"); |
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242 | } |
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243 | @Override |
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244 | public LispObject execute(LispObject arg) |
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245 | { |
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246 | if (arg instanceof WeakHashTable) { |
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247 | return Fixnum.getInstance(((WeakHashTable)arg).getCount()); |
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248 | } |
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249 | return Fixnum.getInstance(checkHashTable(arg).getCount()); |
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250 | } |
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251 | }; |
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252 | |
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253 | private static final Primitive SXHASH |
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254 | = new pf_sxhash(); |
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255 | @DocString(name="sxhash", |
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256 | args="object => hash-code") |
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257 | private static final class pf_sxhash extends Primitive { |
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258 | pf_sxhash() { |
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259 | super(Symbol.SXHASH, "object"); |
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260 | } |
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261 | @Override |
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262 | public LispObject execute(LispObject arg) |
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263 | { |
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264 | return Fixnum.getInstance(arg.sxhash()); |
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265 | } |
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266 | }; |
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267 | |
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268 | // For EQUALP hash tables. |
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269 | @DocString(name="psxhash", |
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270 | args="object") |
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271 | private static final Primitive PSXHASH |
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272 | = new pf_psxhash(); |
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273 | private static final class pf_psxhash extends Primitive { |
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274 | pf_psxhash() { |
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275 | super("psxhash", PACKAGE_SYS, true, "object"); |
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276 | } |
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277 | @Override |
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278 | public LispObject execute(LispObject arg) |
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279 | { |
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280 | return Fixnum.getInstance(arg.psxhash()); |
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281 | } |
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282 | }; |
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283 | |
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284 | private static final Primitive HASH_TABLE_P |
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285 | = new pf_hash_table_p(); |
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286 | @DocString(name="hash-table-p", |
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287 | args="object", |
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288 | doc="Whether OBJECT is an instance of a hash-table.") |
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289 | private static final class pf_hash_table_p extends Primitive { |
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290 | pf_hash_table_p(){ |
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291 | super(Symbol.HASH_TABLE_P,"object"); |
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292 | } |
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293 | @Override |
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294 | public LispObject execute(LispObject arg) |
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295 | { |
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296 | if (arg instanceof WeakHashTable) return T; |
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297 | return arg instanceof HashTable ? T : NIL; |
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298 | } |
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299 | }; |
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300 | |
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301 | private static final Primitive HASH_TABLE_ENTRIES |
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302 | = new pf_hash_table_entries(); |
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303 | @DocString(name="hah-table-entries", |
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304 | args="hash-table", |
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305 | doc="Returns a list of all key/values pairs in HASH-TABLE.") |
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306 | private static final class pf_hash_table_entries extends Primitive { |
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307 | pf_hash_table_entries() { |
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308 | super("hash-table-entries", PACKAGE_SYS, false); |
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309 | } |
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310 | @Override |
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311 | public LispObject execute(LispObject arg) |
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312 | { |
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313 | if (arg instanceof WeakHashTable) { |
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314 | return ((WeakHashTable)arg).ENTRIES(); |
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315 | } |
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316 | return checkHashTable(arg).ENTRIES(); |
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317 | } |
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318 | }; |
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319 | |
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320 | private static final Primitive HASH_TABLE_TEST |
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321 | = new pf_hash_table_test(); |
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322 | @DocString(name="hash-table-test", |
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323 | args="hash-table", |
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324 | doc="Return the test used for the keys of HASH-TABLE.") |
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325 | private static final class pf_hash_table_test extends Primitive { |
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326 | pf_hash_table_test() { |
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327 | super(Symbol.HASH_TABLE_TEST, "hash-table"); |
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328 | } |
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329 | public LispObject execute(LispObject arg) |
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330 | { |
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331 | if (arg instanceof WeakHashTable) { |
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332 | return ((WeakHashTable)arg).getTest(); |
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333 | } |
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334 | return checkHashTable(arg).getTest(); |
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335 | } |
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336 | }; |
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337 | |
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338 | private static final Primitive HASH_TABLE_SIZE |
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339 | = new pf_hash_table_size(); |
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340 | @DocString(name="hash-table-size", |
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341 | args="hash-table", |
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342 | doc="Returns the number of storage buckets in HASH-TABLE.") |
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343 | private static final class pf_hash_table_size extends Primitive { |
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344 | pf_hash_table_size() { |
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345 | super(Symbol.HASH_TABLE_SIZE, "hash-table"); |
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346 | } |
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347 | @Override |
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348 | public LispObject execute(LispObject arg) |
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349 | { |
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350 | if (arg instanceof WeakHashTable) { |
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351 | return Fixnum.getInstance(((WeakHashTable)arg).getSize()); |
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352 | } |
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353 | return Fixnum.getInstance(checkHashTable(arg).getSize()); |
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354 | } |
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355 | }; |
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356 | |
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357 | private static final Primitive HASH_TABLE_REHASH_SIZE |
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358 | = new pf_hash_table_rehash_size(); |
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359 | @DocString(name="hash-table-rehash-size", |
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360 | args="hash-table") |
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361 | private static final class pf_hash_table_rehash_size extends Primitive { |
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362 | pf_hash_table_rehash_size() { |
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363 | super(Symbol.HASH_TABLE_REHASH_SIZE, "hash-table"); |
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364 | } |
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365 | @Override |
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366 | public LispObject execute(LispObject arg) |
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367 | { |
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368 | if (arg instanceof WeakHashTable) { |
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369 | return ((WeakHashTable)arg).getRehashSize(); |
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370 | } |
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371 | return checkHashTable(arg).getRehashSize(); |
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372 | } |
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373 | }; |
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374 | |
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375 | private static final Primitive HASH_TABLE_REHASH_THRESHOLD |
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376 | = new pf_hash_table_rehash_threshold(); |
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377 | @DocString(name="hash-table-rehash-threshold", |
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378 | args="hash-table") |
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379 | private static final class pf_hash_table_rehash_threshold extends Primitive { |
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380 | pf_hash_table_rehash_threshold() { |
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381 | super(Symbol.HASH_TABLE_REHASH_THRESHOLD, "hash-table"); |
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382 | } |
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383 | @Override |
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384 | public LispObject execute(LispObject arg) |
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385 | { |
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386 | if (arg instanceof WeakHashTable) { |
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387 | return ((WeakHashTable)arg).getRehashThreshold(); |
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388 | } |
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389 | return checkHashTable(arg).getRehashThreshold(); |
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390 | } |
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391 | }; |
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392 | |
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393 | private static final Primitive MAPHASH |
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394 | = new pf_maphash(); |
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395 | @DocString(name="maphash", |
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396 | args="function hash-table", |
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397 | doc="Iterates over all entries in the hash-table. For each entry," |
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398 | + " the function is called with two arguments--the key and the" |
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399 | + " value of that entry.") |
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400 | private static final class pf_maphash extends Primitive { |
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401 | pf_maphash() { |
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402 | super(Symbol.MAPHASH, "function hash-table"); |
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403 | } |
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404 | @Override |
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405 | public LispObject execute(LispObject first, LispObject second) |
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406 | { |
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407 | if (second instanceof WeakHashTable) { |
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408 | return ((WeakHashTable)second).MAPHASH(first); |
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409 | } |
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410 | return checkHashTable(second).MAPHASH(first); |
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411 | } |
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412 | }; |
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413 | |
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414 | private static final Primitive HASH_TABLE_WEAKNESS |
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415 | = new pf_hash_table_weakness(); |
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416 | @DocString(name="hash-table-weakness", |
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417 | args="hash-table", |
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418 | doc="Return weakness property of HASH-TABLE, or NIL if it has none.") |
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419 | private static final class pf_hash_table_weakness extends Primitive { |
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420 | pf_hash_table_weakness() { |
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421 | super(Symbol.HASH_TABLE_WEAKNESS, "hash-table"); |
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422 | } |
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423 | @Override |
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424 | public LispObject execute(LispObject first) |
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425 | { |
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426 | if (first instanceof HashTable) { |
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427 | return NIL; |
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428 | } else if (first instanceof WeakHashTable) { |
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429 | return ((WeakHashTable)first).getWeakness(); |
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430 | } |
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431 | return error(new TypeError(first, Symbol.HASH_TABLE)); |
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432 | } |
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433 | }; |
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434 | |
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435 | protected static HashTable checkHashTable(LispObject ht) { |
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436 | if (ht instanceof HashTable) return (HashTable)ht; |
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437 | type_error(ht, Symbol.HASH_TABLE); |
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438 | return null; |
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439 | } |
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440 | } |
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