1 | /* |
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2 | * Bignum.java |
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3 | * |
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4 | * Copyright (C) 2003-2007 Peter Graves |
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5 | * $Id: Bignum.java 15548 2022-02-11 08:58:41Z mevenson $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | import java.math.BigInteger; |
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39 | |
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40 | public final class Bignum extends LispInteger |
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41 | { |
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42 | public final BigInteger value; |
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43 | |
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44 | private static BigInteger MOST_NEGATIVE_FIXNUM = |
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45 | BigInteger.valueOf(Integer.MIN_VALUE); |
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46 | private static BigInteger MOST_POSITIVE_FIXNUM = |
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47 | BigInteger.valueOf(Integer.MAX_VALUE); |
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48 | |
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49 | public static LispInteger getInstance(long l) { |
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50 | if (Integer.MIN_VALUE <= l && l <= Integer.MAX_VALUE) |
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51 | return Fixnum.getInstance(l); |
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52 | else |
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53 | return new Bignum(l); |
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54 | } |
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55 | |
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56 | public static LispInteger getInstance(BigInteger n) { |
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57 | if (MOST_NEGATIVE_FIXNUM.compareTo(n) < 0 || |
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58 | MOST_POSITIVE_FIXNUM.compareTo(n) > 0) |
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59 | return new Bignum(n); |
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60 | else |
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61 | return Fixnum.getInstance(n.intValue()); |
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62 | } |
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63 | |
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64 | public static LispInteger getInstance(String s, int radix) { |
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65 | BigInteger value = new BigInteger(s, radix); |
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66 | |
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67 | return Bignum.getInstance(value); |
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68 | } |
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69 | |
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70 | private Bignum(long l) |
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71 | { |
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72 | value = BigInteger.valueOf(l); |
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73 | } |
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74 | |
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75 | private Bignum(BigInteger n) |
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76 | { |
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77 | value = n; |
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78 | } |
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79 | |
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80 | @Override |
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81 | public Object javaInstance() |
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82 | { |
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83 | return value; |
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84 | } |
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85 | |
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86 | @Override |
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87 | public Object javaInstance(Class c) { |
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88 | if (c == Byte.class || c == byte.class) |
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89 | return Byte.valueOf((byte)value.intValue()); |
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90 | if (c == Short.class || c == short.class) |
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91 | return Short.valueOf((short)value.intValue()); |
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92 | if (c == Integer.class || c == int.class) |
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93 | return Integer.valueOf(value.intValue()); |
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94 | if (c == Long.class || c == long.class) |
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95 | return Long.valueOf((long)value.longValue()); |
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96 | return javaInstance(); |
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97 | } |
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98 | |
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99 | |
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100 | @Override |
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101 | public LispObject typeOf() |
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102 | { |
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103 | if (value.signum() > 0) |
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104 | return list(Symbol.INTEGER, |
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105 | new Bignum((long)Integer.MAX_VALUE + 1)); |
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106 | return Symbol.BIGNUM; |
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107 | } |
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108 | |
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109 | @Override |
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110 | public LispObject classOf() |
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111 | { |
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112 | return BuiltInClass.BIGNUM; |
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113 | } |
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114 | |
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115 | @Override |
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116 | public LispObject typep(LispObject type) |
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117 | { |
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118 | if (type instanceof Symbol) |
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119 | { |
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120 | if (type == Symbol.BIGNUM) |
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121 | return T; |
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122 | if (type == Symbol.INTEGER) |
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123 | return T; |
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124 | if (type == Symbol.RATIONAL) |
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125 | return T; |
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126 | if (type == Symbol.REAL) |
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127 | return T; |
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128 | if (type == Symbol.NUMBER) |
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129 | return T; |
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130 | if (type == Symbol.SIGNED_BYTE) |
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131 | return T; |
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132 | if (type == Symbol.UNSIGNED_BYTE) |
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133 | return value.signum() >= 0 ? T : NIL; |
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134 | } |
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135 | else if (type instanceof LispClass) |
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136 | { |
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137 | if (type == BuiltInClass.BIGNUM) |
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138 | return T; |
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139 | if (type == BuiltInClass.INTEGER) |
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140 | return T; |
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141 | if (type == BuiltInClass.RATIONAL) |
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142 | return T; |
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143 | if (type == BuiltInClass.REAL) |
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144 | return T; |
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145 | if (type == BuiltInClass.NUMBER) |
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146 | return T; |
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147 | } |
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148 | else if (type instanceof Cons) |
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149 | { |
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150 | if (type.equal(UNSIGNED_BYTE_8)) |
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151 | return NIL; |
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152 | if (type.equal(UNSIGNED_BYTE_32)) |
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153 | { |
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154 | if (minusp()) |
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155 | return NIL; |
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156 | return isLessThanOrEqualTo(UNSIGNED_BYTE_32_MAX_VALUE) ? T : NIL; |
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157 | } |
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158 | } |
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159 | return super.typep(type); |
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160 | } |
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161 | |
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162 | @Override |
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163 | public boolean numberp() |
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164 | { |
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165 | return true; |
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166 | } |
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167 | |
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168 | @Override |
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169 | public boolean integerp() |
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170 | { |
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171 | return true; |
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172 | } |
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173 | |
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174 | @Override |
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175 | public boolean rationalp() |
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176 | { |
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177 | return true; |
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178 | } |
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179 | |
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180 | @Override |
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181 | public boolean realp() |
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182 | { |
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183 | return true; |
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184 | } |
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185 | |
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186 | @Override |
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187 | public boolean eql(LispObject obj) |
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188 | { |
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189 | if (this == obj) |
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190 | return true; |
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191 | if (obj instanceof Bignum) |
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192 | { |
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193 | if (value.equals(((Bignum)obj).value)) |
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194 | return true; |
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195 | } |
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196 | return false; |
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197 | } |
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198 | |
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199 | @Override |
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200 | public boolean equal(LispObject obj) |
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201 | { |
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202 | if (this == obj) |
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203 | return true; |
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204 | if (obj instanceof Bignum) |
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205 | { |
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206 | if (value.equals(((Bignum)obj).value)) |
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207 | return true; |
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208 | } |
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209 | return false; |
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210 | } |
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211 | |
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212 | @Override |
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213 | public boolean equalp(LispObject obj) |
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214 | { |
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215 | if (obj != null && obj.numberp()) |
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216 | return isEqualTo(obj); |
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217 | return false; |
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218 | } |
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219 | |
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220 | @Override |
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221 | public LispObject ABS() |
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222 | { |
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223 | if (value.signum() >= 0) |
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224 | return this; |
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225 | return new Bignum(value.negate()); |
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226 | } |
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227 | |
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228 | @Override |
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229 | public LispObject NUMERATOR() |
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230 | { |
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231 | return this; |
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232 | } |
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233 | |
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234 | @Override |
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235 | public LispObject DENOMINATOR() |
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236 | { |
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237 | return Fixnum.ONE; |
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238 | } |
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239 | |
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240 | @Override |
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241 | public boolean evenp() |
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242 | { |
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243 | return !value.testBit(0); |
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244 | } |
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245 | |
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246 | @Override |
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247 | public boolean oddp() |
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248 | { |
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249 | return value.testBit(0); |
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250 | } |
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251 | |
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252 | @Override |
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253 | public boolean plusp() |
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254 | { |
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255 | return value.signum() > 0; |
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256 | } |
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257 | |
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258 | @Override |
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259 | public boolean minusp() |
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260 | { |
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261 | return value.signum() < 0; |
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262 | } |
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263 | |
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264 | @Override |
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265 | public boolean zerop() |
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266 | { |
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267 | return false; |
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268 | } |
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269 | |
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270 | @Override |
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271 | public int intValue() |
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272 | { |
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273 | return value.intValue(); |
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274 | } |
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275 | |
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276 | @Override |
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277 | public long longValue() |
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278 | { |
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279 | return value.longValue(); |
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280 | } |
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281 | |
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282 | @Override |
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283 | public float floatValue() |
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284 | { |
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285 | float f = value.floatValue(); |
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286 | if (Float.isInfinite(f)) |
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287 | error(new TypeError("The value " + princToString() + |
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288 | " is too large to be converted to a single float.")); |
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289 | return f; |
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290 | } |
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291 | |
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292 | @Override |
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293 | public double doubleValue() |
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294 | { |
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295 | double d = value.doubleValue(); |
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296 | if (Double.isInfinite(d)) |
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297 | error(new TypeError("The value " + princToString() + |
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298 | " is too large to be converted to a double float.")); |
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299 | return d; |
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300 | } |
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301 | |
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302 | public static BigInteger getValue(LispObject obj) |
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303 | { |
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304 | |
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305 | if (obj instanceof Bignum) |
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306 | { |
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307 | return ((Bignum)obj).value; |
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308 | } |
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309 | type_error(obj, Symbol.BIGNUM); |
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310 | // Not reached. |
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311 | return null; |
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312 | } |
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313 | |
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314 | @Override |
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315 | public final LispObject incr() |
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316 | { |
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317 | return number(value.add(BigInteger.ONE)); |
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318 | } |
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319 | |
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320 | @Override |
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321 | public final LispObject decr() |
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322 | { |
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323 | return number(value.subtract(BigInteger.ONE)); |
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324 | } |
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325 | |
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326 | @Override |
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327 | public LispObject add(int n) |
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328 | { |
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329 | return number(value.add(BigInteger.valueOf(n))); |
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330 | } |
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331 | |
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332 | @Override |
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333 | public LispObject add(LispObject obj) |
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334 | { |
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335 | if (obj instanceof Fixnum) |
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336 | return number(value.add(Fixnum.getBigInteger(obj))); |
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337 | if (obj instanceof Bignum) |
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338 | return number(value.add(((Bignum)obj).value)); |
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339 | if (obj instanceof Ratio) |
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340 | { |
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341 | BigInteger numerator = ((Ratio)obj).numerator(); |
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342 | BigInteger denominator = ((Ratio)obj).denominator(); |
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343 | return number(value.multiply(denominator).add(numerator), |
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344 | denominator); |
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345 | } |
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346 | if (obj instanceof SingleFloat) |
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347 | return new SingleFloat(floatValue() + ((SingleFloat)obj).value); |
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348 | if (obj instanceof DoubleFloat) |
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349 | return new DoubleFloat(doubleValue() + ((DoubleFloat)obj).value); |
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350 | if (obj instanceof Complex) |
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351 | { |
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352 | Complex c = (Complex) obj; |
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353 | return Complex.getInstance(add(c.getRealPart()), c.getImaginaryPart()); |
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354 | } |
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355 | return type_error(obj, Symbol.NUMBER); |
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356 | } |
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357 | |
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358 | @Override |
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359 | public LispObject subtract(LispObject obj) |
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360 | { |
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361 | if (obj instanceof Fixnum) |
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362 | return number(value.subtract(Fixnum.getBigInteger(obj))); |
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363 | if (obj instanceof Bignum) |
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364 | return number(value.subtract(((Bignum)obj).value)); |
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365 | if (obj instanceof Ratio) |
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366 | { |
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367 | BigInteger numerator = ((Ratio)obj).numerator(); |
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368 | BigInteger denominator = ((Ratio)obj).denominator(); |
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369 | return number(value.multiply(denominator).subtract(numerator), |
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370 | denominator); |
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371 | } |
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372 | if (obj instanceof SingleFloat) |
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373 | return new SingleFloat(floatValue() - ((SingleFloat)obj).value); |
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374 | if (obj instanceof DoubleFloat) |
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375 | return new DoubleFloat(doubleValue() - ((DoubleFloat)obj).value); |
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376 | if (obj instanceof Complex) |
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377 | { |
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378 | Complex c = (Complex) obj; |
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379 | return Complex.getInstance(subtract(c.getRealPart()), |
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380 | Fixnum.ZERO.subtract(c.getImaginaryPart())); |
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381 | } |
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382 | return type_error(obj, Symbol.NUMBER); |
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383 | } |
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384 | |
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385 | @Override |
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386 | public LispObject multiplyBy(int n) |
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387 | { |
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388 | if (n == 0) |
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389 | return Fixnum.ZERO; |
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390 | if (n == 1) |
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391 | return this; |
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392 | return new Bignum(value.multiply(BigInteger.valueOf(n))); |
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393 | } |
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394 | |
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395 | @Override |
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396 | public LispObject multiplyBy(LispObject obj) |
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397 | { |
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398 | if (obj instanceof Fixnum) |
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399 | { |
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400 | int n = ((Fixnum)obj).value; |
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401 | if (n == 0) |
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402 | return Fixnum.ZERO; |
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403 | if (n == 1) |
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404 | return this; |
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405 | return new Bignum(value.multiply(BigInteger.valueOf(n))); |
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406 | } |
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407 | if (obj instanceof Bignum) |
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408 | return new Bignum(value.multiply(((Bignum)obj).value)); |
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409 | if (obj instanceof Ratio) |
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410 | { |
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411 | BigInteger n = ((Ratio)obj).numerator(); |
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412 | return number(n.multiply(value), ((Ratio)obj).denominator()); |
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413 | } |
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414 | if (obj instanceof SingleFloat) |
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415 | return new SingleFloat(floatValue() * ((SingleFloat)obj).value); |
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416 | if (obj instanceof DoubleFloat) |
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417 | return new DoubleFloat(doubleValue() * ((DoubleFloat)obj).value); |
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418 | if (obj instanceof Complex) |
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419 | { |
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420 | Complex c = (Complex) obj; |
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421 | return Complex.getInstance(multiplyBy(c.getRealPart()), |
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422 | multiplyBy(c.getImaginaryPart())); |
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423 | } |
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424 | return type_error(obj, Symbol.NUMBER); |
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425 | } |
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426 | |
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427 | @Override |
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428 | public LispObject divideBy(LispObject obj) |
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429 | { |
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430 | if (obj instanceof Fixnum) |
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431 | return number(value, Fixnum.getBigInteger(obj)); |
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432 | if (obj instanceof Bignum) |
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433 | return number(value, ((Bignum)obj).value); |
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434 | if (obj instanceof Ratio) |
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435 | { |
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436 | BigInteger d = ((Ratio)obj).denominator(); |
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437 | return number(d.multiply(value), ((Ratio)obj).numerator()); |
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438 | } |
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439 | if (obj instanceof SingleFloat) |
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440 | return new SingleFloat(floatValue() / ((SingleFloat)obj).value); |
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441 | if (obj instanceof DoubleFloat) |
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442 | return new DoubleFloat(doubleValue() / ((DoubleFloat)obj).value); |
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443 | if (obj instanceof Complex) |
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444 | { |
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445 | Complex c = (Complex) obj; |
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446 | LispObject realPart = c.getRealPart(); |
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447 | LispObject imagPart = c.getImaginaryPart(); |
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448 | LispObject denominator = |
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449 | realPart.multiplyBy(realPart).add(imagPart.multiplyBy(imagPart)); |
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450 | return Complex.getInstance(multiplyBy(realPart).divideBy(denominator), |
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451 | Fixnum.ZERO.subtract(multiplyBy(imagPart).divideBy(denominator))); |
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452 | } |
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453 | return type_error(obj, Symbol.NUMBER); |
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454 | } |
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455 | |
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456 | @Override |
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457 | public boolean isEqualTo(LispObject obj) |
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458 | { |
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459 | if (obj instanceof Bignum) |
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460 | return value.equals(((Bignum)obj).value); |
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461 | if (obj instanceof SingleFloat) |
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462 | return isEqualTo(((SingleFloat)obj).rational()); |
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463 | if (obj instanceof DoubleFloat) |
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464 | return isEqualTo(((DoubleFloat)obj).rational()); |
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465 | if (obj.numberp()) |
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466 | return false; |
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467 | type_error(obj, Symbol.NUMBER); |
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468 | // Not reached. |
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469 | return false; |
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470 | } |
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471 | |
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472 | @Override |
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473 | public boolean isNotEqualTo(LispObject obj) |
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474 | { |
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475 | if (obj instanceof Bignum) |
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476 | return !value.equals(((Bignum)obj).value); |
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477 | if (obj instanceof SingleFloat) |
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478 | return isNotEqualTo(((SingleFloat)obj).rational()); |
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479 | if (obj instanceof DoubleFloat) |
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480 | return isNotEqualTo(((DoubleFloat)obj).rational()); |
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481 | if (obj.numberp()) |
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482 | return true; |
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483 | type_error(obj, Symbol.NUMBER); |
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484 | // Not reached. |
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485 | return false; |
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486 | } |
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487 | |
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488 | @Override |
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489 | public boolean isLessThan(LispObject obj) |
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490 | { |
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491 | if (obj instanceof Fixnum) |
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492 | return value.compareTo(Fixnum.getBigInteger(obj)) < 0; |
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493 | if (obj instanceof Bignum) |
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494 | return value.compareTo(((Bignum)obj).value) < 0; |
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495 | if (obj instanceof Ratio) |
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496 | { |
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497 | BigInteger n = value.multiply(((Ratio)obj).denominator()); |
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498 | return n.compareTo(((Ratio)obj).numerator()) < 0; |
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499 | } |
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500 | if (obj instanceof SingleFloat) |
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501 | return isLessThan(((SingleFloat)obj).rational()); |
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502 | if (obj instanceof DoubleFloat) |
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503 | return isLessThan(((DoubleFloat)obj).rational()); |
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504 | type_error(obj, Symbol.REAL); |
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505 | // Not reached. |
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506 | return false; |
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507 | } |
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508 | |
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509 | @Override |
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510 | public boolean isGreaterThan(LispObject obj) |
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511 | { |
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512 | if (obj instanceof Fixnum) |
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513 | return value.compareTo(Fixnum.getBigInteger(obj)) > 0; |
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514 | if (obj instanceof Bignum) |
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515 | return value.compareTo(((Bignum)obj).value) > 0; |
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516 | if (obj instanceof Ratio) |
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517 | { |
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518 | BigInteger n = value.multiply(((Ratio)obj).denominator()); |
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519 | return n.compareTo(((Ratio)obj).numerator()) > 0; |
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520 | } |
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521 | if (obj instanceof SingleFloat) |
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522 | return isGreaterThan(((SingleFloat)obj).rational()); |
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523 | if (obj instanceof DoubleFloat) |
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524 | return isGreaterThan(((DoubleFloat)obj).rational()); |
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525 | type_error(obj, Symbol.REAL); |
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526 | // Not reached. |
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527 | return false; |
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528 | } |
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529 | |
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530 | @Override |
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531 | public boolean isLessThanOrEqualTo(LispObject obj) |
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532 | { |
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533 | if (obj instanceof Fixnum) |
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534 | return value.compareTo(Fixnum.getBigInteger(obj)) <= 0; |
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535 | if (obj instanceof Bignum) |
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536 | return value.compareTo(((Bignum)obj).value) <= 0; |
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537 | if (obj instanceof Ratio) |
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538 | { |
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539 | BigInteger n = value.multiply(((Ratio)obj).denominator()); |
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540 | return n.compareTo(((Ratio)obj).numerator()) <= 0; |
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541 | } |
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542 | if (obj instanceof SingleFloat) |
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543 | return isLessThanOrEqualTo(((SingleFloat)obj).rational()); |
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544 | if (obj instanceof DoubleFloat) |
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545 | return isLessThanOrEqualTo(((DoubleFloat)obj).rational()); |
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546 | type_error(obj, Symbol.REAL); |
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547 | // Not reached. |
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548 | return false; |
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549 | } |
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550 | |
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551 | @Override |
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552 | public boolean isGreaterThanOrEqualTo(LispObject obj) |
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553 | { |
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554 | if (obj instanceof Fixnum) |
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555 | return value.compareTo(Fixnum.getBigInteger(obj)) >= 0; |
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556 | if (obj instanceof Bignum) |
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557 | return value.compareTo(((Bignum)obj).value) >= 0; |
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558 | if (obj instanceof Ratio) |
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559 | { |
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560 | BigInteger n = value.multiply(((Ratio)obj).denominator()); |
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561 | return n.compareTo(((Ratio)obj).numerator()) >= 0; |
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562 | } |
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563 | if (obj instanceof SingleFloat) |
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564 | return isGreaterThanOrEqualTo(((SingleFloat)obj).rational()); |
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565 | if (obj instanceof DoubleFloat) |
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566 | return isGreaterThanOrEqualTo(((DoubleFloat)obj).rational()); |
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567 | type_error(obj, Symbol.REAL); |
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568 | // Not reached. |
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569 | return false; |
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570 | } |
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571 | |
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572 | @Override |
---|
573 | public LispObject truncate(LispObject obj) |
---|
574 | { |
---|
575 | final LispThread thread = LispThread.currentThread(); |
---|
576 | LispObject value1, value2; |
---|
577 | try |
---|
578 | { |
---|
579 | if (obj instanceof Fixnum) |
---|
580 | { |
---|
581 | BigInteger divisor = ((Fixnum)obj).getBigInteger(); |
---|
582 | BigInteger[] results = value.divideAndRemainder(divisor); |
---|
583 | BigInteger quotient = results[0]; |
---|
584 | BigInteger remainder = results[1]; |
---|
585 | value1 = number(quotient); |
---|
586 | value2 = (remainder.signum() == 0) ? Fixnum.ZERO : number(remainder); |
---|
587 | } |
---|
588 | else if (obj instanceof Bignum) |
---|
589 | { |
---|
590 | BigInteger divisor = ((Bignum)obj).value; |
---|
591 | BigInteger[] results = value.divideAndRemainder(divisor); |
---|
592 | BigInteger quotient = results[0]; |
---|
593 | BigInteger remainder = results[1]; |
---|
594 | value1 = number(quotient); |
---|
595 | value2 = (remainder.signum() == 0) ? Fixnum.ZERO : number(remainder); |
---|
596 | } |
---|
597 | else if (obj instanceof Ratio) |
---|
598 | { |
---|
599 | Ratio divisor = (Ratio) obj; |
---|
600 | LispObject quotient = |
---|
601 | multiplyBy(divisor.DENOMINATOR()).truncate(divisor.NUMERATOR()); |
---|
602 | LispObject remainder = |
---|
603 | subtract(quotient.multiplyBy(divisor)); |
---|
604 | value1 = quotient; |
---|
605 | value2 = remainder; |
---|
606 | } |
---|
607 | else if (obj instanceof SingleFloat) |
---|
608 | { |
---|
609 | // "When rationals and floats are combined by a numerical |
---|
610 | // function, the rational is first converted to a float of the |
---|
611 | // same format." 12.1.4.1 |
---|
612 | return new SingleFloat(floatValue()).truncate(obj); |
---|
613 | } |
---|
614 | else if (obj instanceof DoubleFloat) |
---|
615 | { |
---|
616 | // "When rationals and floats are combined by a numerical |
---|
617 | // function, the rational is first converted to a float of the |
---|
618 | // same format." 12.1.4.1 |
---|
619 | return new DoubleFloat(doubleValue()).truncate(obj); |
---|
620 | } |
---|
621 | else |
---|
622 | return type_error(obj, Symbol.REAL); |
---|
623 | } |
---|
624 | catch (ArithmeticException e) |
---|
625 | { |
---|
626 | if (obj.zerop()) { |
---|
627 | LispObject operands = new Cons(this, new Cons(obj)); |
---|
628 | LispObject args = new Cons(Keyword.OPERATION, |
---|
629 | new Cons(Symbol.TRUNCATE, |
---|
630 | new Cons(Keyword.OPERANDS, |
---|
631 | new Cons(operands)))); |
---|
632 | |
---|
633 | return error(new DivisionByZero(args)); |
---|
634 | } |
---|
635 | else |
---|
636 | return error(new ArithmeticError(e.getMessage())); |
---|
637 | } |
---|
638 | return thread.setValues(value1, value2); |
---|
639 | } |
---|
640 | |
---|
641 | @Override |
---|
642 | public LispObject ash(LispObject obj) |
---|
643 | { |
---|
644 | BigInteger n = value; |
---|
645 | if (obj instanceof Fixnum) |
---|
646 | { |
---|
647 | int count = ((Fixnum)obj).value; |
---|
648 | if (count == 0) |
---|
649 | return this; |
---|
650 | // BigInteger.shiftLeft() succumbs to a stack overflow if count |
---|
651 | // is Integer.MIN_VALUE, so... |
---|
652 | if (count == Integer.MIN_VALUE) |
---|
653 | return n.signum() >= 0 ? Fixnum.ZERO : Fixnum.MINUS_ONE; |
---|
654 | return number(n.shiftLeft(count)); |
---|
655 | } |
---|
656 | if (obj instanceof Bignum) |
---|
657 | { |
---|
658 | BigInteger count = ((Bignum)obj).value; |
---|
659 | if (count.signum() > 0) |
---|
660 | return error(new LispError("Can't represent result of left shift.")); |
---|
661 | if (count.signum() < 0) |
---|
662 | return n.signum() >= 0 ? Fixnum.ZERO : Fixnum.MINUS_ONE; |
---|
663 | Debug.bug(); // Shouldn't happen. |
---|
664 | } |
---|
665 | return type_error(obj, Symbol.INTEGER); |
---|
666 | } |
---|
667 | |
---|
668 | @Override |
---|
669 | public LispObject LOGNOT() |
---|
670 | { |
---|
671 | return number(value.not()); |
---|
672 | } |
---|
673 | |
---|
674 | @Override |
---|
675 | public LispObject LOGAND(int n) |
---|
676 | { |
---|
677 | if (n >= 0) |
---|
678 | return Fixnum.getInstance(value.intValue() & n); |
---|
679 | else |
---|
680 | return number(value.and(BigInteger.valueOf(n))); |
---|
681 | } |
---|
682 | |
---|
683 | @Override |
---|
684 | public LispObject LOGAND(LispObject obj) |
---|
685 | { |
---|
686 | if (obj instanceof Fixnum) |
---|
687 | { |
---|
688 | int n = ((Fixnum)obj).value; |
---|
689 | if (n >= 0) |
---|
690 | return Fixnum.getInstance(value.intValue() & n); |
---|
691 | else |
---|
692 | return number(value.and(BigInteger.valueOf(n))); |
---|
693 | } |
---|
694 | else if (obj instanceof Bignum) |
---|
695 | { |
---|
696 | final BigInteger n = ((Bignum)obj).value; |
---|
697 | return number(value.and(n)); |
---|
698 | } |
---|
699 | else |
---|
700 | return type_error(obj, Symbol.INTEGER); |
---|
701 | } |
---|
702 | |
---|
703 | @Override |
---|
704 | public LispObject LOGIOR(int n) |
---|
705 | { |
---|
706 | return number(value.or(BigInteger.valueOf(n))); |
---|
707 | } |
---|
708 | |
---|
709 | @Override |
---|
710 | public LispObject LOGIOR(LispObject obj) |
---|
711 | { |
---|
712 | if (obj instanceof Fixnum) |
---|
713 | { |
---|
714 | final BigInteger n = ((Fixnum)obj).getBigInteger(); |
---|
715 | return number(value.or(n)); |
---|
716 | } |
---|
717 | else if (obj instanceof Bignum) |
---|
718 | { |
---|
719 | final BigInteger n = ((Bignum)obj).value; |
---|
720 | return number(value.or(n)); |
---|
721 | } |
---|
722 | else |
---|
723 | return type_error(obj, Symbol.INTEGER); |
---|
724 | } |
---|
725 | |
---|
726 | @Override |
---|
727 | public LispObject LOGXOR(int n) |
---|
728 | { |
---|
729 | return number(value.xor(BigInteger.valueOf(n))); |
---|
730 | } |
---|
731 | |
---|
732 | @Override |
---|
733 | public LispObject LOGXOR(LispObject obj) |
---|
734 | { |
---|
735 | final BigInteger n; |
---|
736 | if (obj instanceof Fixnum) |
---|
737 | n = ((Fixnum)obj).getBigInteger(); |
---|
738 | else if (obj instanceof Bignum) |
---|
739 | n = ((Bignum)obj).value; |
---|
740 | else |
---|
741 | return type_error(obj, Symbol.INTEGER); |
---|
742 | return number(value.xor(n)); |
---|
743 | } |
---|
744 | |
---|
745 | @Override |
---|
746 | public LispObject LDB(int size, int position) |
---|
747 | { |
---|
748 | BigInteger n = value.shiftRight(position); |
---|
749 | BigInteger mask = BigInteger.ONE.shiftLeft(size).subtract(BigInteger.ONE); |
---|
750 | return number(n.and(mask)); |
---|
751 | } |
---|
752 | |
---|
753 | @Override |
---|
754 | public int hashCode() |
---|
755 | { |
---|
756 | return value.hashCode(); |
---|
757 | } |
---|
758 | |
---|
759 | @Override |
---|
760 | public String printObject() |
---|
761 | { |
---|
762 | final LispThread thread = LispThread.currentThread(); |
---|
763 | final int base = Fixnum.getValue(Symbol.PRINT_BASE.symbolValue(thread)); |
---|
764 | String s = value.toString(base).toUpperCase(); |
---|
765 | if (Symbol.PRINT_RADIX.symbolValue(thread) != NIL) |
---|
766 | { |
---|
767 | StringBuffer sb = new StringBuffer(); |
---|
768 | switch (base) |
---|
769 | { |
---|
770 | case 2: |
---|
771 | sb.append("#b"); |
---|
772 | sb.append(s); |
---|
773 | break; |
---|
774 | case 8: |
---|
775 | sb.append("#o"); |
---|
776 | sb.append(s); |
---|
777 | break; |
---|
778 | case 10: |
---|
779 | sb.append(s); |
---|
780 | sb.append('.'); |
---|
781 | break; |
---|
782 | case 16: |
---|
783 | sb.append("#x"); |
---|
784 | sb.append(s); |
---|
785 | break; |
---|
786 | default: |
---|
787 | sb.append('#'); |
---|
788 | sb.append(String.valueOf(base)); |
---|
789 | sb.append('r'); |
---|
790 | sb.append(s); |
---|
791 | break; |
---|
792 | } |
---|
793 | s = sb.toString(); |
---|
794 | } |
---|
795 | return s; |
---|
796 | } |
---|
797 | } |
---|