1 /*
   2  * Copyright (c) 2018, Raffaello Giulietti. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  * This particular file is subject to the "Classpath" exception as provided
   9  * in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21 
  22 import java.math.BigDecimal;
  23 
  24 /**
  25  * @author Raffaello Giulietti
  26  */
  27 class DoubleToStringChecker extends StringChecker {
  28 
  29     private double v;
  30 
  31     DoubleToStringChecker(double v, String s) {
  32         super(s);
  33         this.v = v;
  34     }
  35 
  36     @Override
  37     BigDecimal toBigDecimal() {
  38         return new BigDecimal(v);
  39     }
  40 
  41     @Override
  42     boolean recovers(BigDecimal b) {
  43         return b.doubleValue() == v;
  44     }
  45 
  46     @Override
  47     boolean recovers(String s) {
  48         return Double.parseDouble(s) == v;
  49     }
  50 
  51     @Override
  52     int maxExp() {
  53         return 309;
  54     }
  55 
  56     @Override
  57     int minExp() {
  58         return -323;
  59     }
  60 
  61     @Override
  62     int maxLen10() {
  63         return 17;
  64     }
  65 
  66     @Override
  67     boolean isZero() {
  68         return v == 0;
  69     }
  70 
  71     @Override
  72     boolean isInfinity() {
  73         return v == Double.POSITIVE_INFINITY;
  74     }
  75 
  76     @Override
  77     void invert() {
  78         v = -v;
  79     }
  80 
  81     @Override
  82     boolean isNegative() {
  83         return Double.doubleToRawLongBits(v) < 0;
  84     }
  85 
  86     @Override
  87     boolean isNaN() {
  88         return v != v;
  89     }
  90 
  91 }