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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.runtime.core.range;
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11
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12 import com.oracle.truffle.ruby.runtime.core.*;
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13 import com.oracle.truffle.ruby.runtime.core.array.*;
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14
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15 /**
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16 * A range that has {@code Fixnum} begin and end.
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17 */
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18 public class FixnumRange extends RubyRange {
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19
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20 private final int begin;
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21 private final int end;
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22 private final boolean excludeEnd;
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23
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24 public FixnumRange(RubyClass rangeClass, int begin, int end, boolean excludeEnd) {
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25 super(rangeClass);
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26 this.begin = begin;
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27 this.end = end;
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28 this.excludeEnd = excludeEnd;
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29 }
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30
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31 @Override
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32 public String toString() {
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33 if (excludeEnd) {
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34 return begin + "..." + end;
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35 } else {
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36 return begin + ".." + end;
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37 }
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38 }
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39
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40 @Override
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41 public RubyArray toArray() {
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42 final int length = getLength();
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43
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44 if (length < 0) {
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45 return new RubyArray(getRubyClass().getContext().getCoreLibrary().getArrayClass());
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46 } else {
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47 final int[] values = new int[length];
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48
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49 for (int n = 0; n < length; n++) {
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50 values[n] = begin + n;
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51 }
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52
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53 return new RubyArray(getRubyClass().getContext().getCoreLibrary().getArrayClass(), new FixnumArrayStore(values));
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54 }
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55 }
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56
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57 private int getLength() {
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58 if (excludeEnd) {
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59 return end - begin;
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60 } else {
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61 return end - begin + 1;
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62 }
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63 }
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64
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65 public final int getBegin() {
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66 return begin;
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67 }
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68
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69 public final int getEnd() {
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70 return end;
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71 }
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72
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73 public final int getInclusiveEnd() {
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74 if (excludeEnd) {
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75 return end - 1;
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76 } else {
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77 return end;
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78 }
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79 }
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80
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81 public final int getExclusiveEnd() {
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82 if (excludeEnd) {
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83 return end;
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84 } else {
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85 return end + 1;
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86 }
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87 }
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88
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89 @Override
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90 public boolean doesExcludeEnd() {
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91 return excludeEnd;
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92 }
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93
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94 @Override
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95 public int hashCode() {
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96 final int prime = 31;
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97 int result = 1;
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98 result = prime * result + begin;
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99 result = prime * result + end;
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100 result = prime * result + (excludeEnd ? 1231 : 1237);
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101 return result;
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102 }
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103
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104 @Override
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105 public boolean equals(Object obj) {
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106 if (this == obj) {
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107 return true;
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108 }
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109 if (obj == null) {
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110 return false;
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111 }
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112 if (!(obj instanceof FixnumRange)) {
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113 return false;
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114 }
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115 FixnumRange other = (FixnumRange) obj;
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116 if (begin != other.begin) {
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117 return false;
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118 }
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119 if (end != other.end) {
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120 return false;
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121 }
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122 if (excludeEnd != other.excludeEnd) {
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123 return false;
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124 }
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125 return true;
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126 }
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127
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128 }
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