Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/IntVector.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 58a6900f845d
children
rev   line source
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1 /*
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2 * Copyright (c) 2011-2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import java.util.Arrays;
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20
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21 /**
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22 * Vector of primitive values
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23 *
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24 * @author Artem Tikhomirov
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25 * @author TMate Software Ltd.
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26 */
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27 public class IntVector implements Cloneable {
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28
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29 private int[] data;
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30 private final int increment;
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31 private int count;
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32
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33
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34 public IntVector() {
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35 this(16, -1);
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36 }
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37
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38 // increment == -1: grow by power of two.
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39 // increment == 0: no resize (Exception will be thrown on attempt to add past capacity)
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40 public IntVector(int initialCapacity, int increment) {
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41 data = new int[initialCapacity];
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42 this.increment = increment;
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43 }
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44
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45 public void add(int v) {
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46 if (count == data.length) {
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47 grow(0);
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48 }
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49 data[count++] = v;
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50 }
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51
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52 public void add(int... values) {
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53 if (count + values.length > data.length) {
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54 grow(count + values.length);
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55 }
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56 for (int v : values) {
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57 data[count++] = v;
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58 }
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59 }
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61 public void addAll(IntVector other) {
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62 final int otherLen = other.count;
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63 if (count + otherLen > data.length) {
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64 grow(count + otherLen);
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65 }
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66 for (int i = 0; i < otherLen; i++) {
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67 data[count++] = other.data[i];
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68 }
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69 }
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71 public int get(int i) {
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72 if (i < 0 || i >= count) {
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73 throw new IndexOutOfBoundsException(String.format("Index: %d, size: %d", i, count));
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74 }
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75 return data[i];
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76 }
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77
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78 public void set(int i, int v) {
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79 if (i < 0 || i >= count) {
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80 throw new IndexOutOfBoundsException(String.format("Index: %d, size: %d", i, count));
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81 }
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82 data[i] = v;
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83 }
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85 public int size() {
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86 return count;
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87 }
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88
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89 public boolean isEmpty() {
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90 return count == 0;
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91 }
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92
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93 public void clear() {
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94 count = 0;
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95 }
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97 public void trimTo(int newSize) {
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98 if (newSize < 0 || newSize > count) {
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99 throw new IllegalArgumentException(String.format("Can't trim vector of size %d to %d", count, newSize));
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100 }
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101 count = newSize;
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102 }
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103
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104 public void trimToSize() {
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105 data = toArray(true);
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106 }
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108
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109 public int[] toArray() {
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110 int[] rv = new int[count];
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111 System.arraycopy(data, 0, rv, 0, count);
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112 return rv;
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113 }
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115 public void reverse() {
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116 for (int a = 0, b = count-1; a < b; a++, b--) {
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117 int t = data[b];
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118 data[b] = data[a];
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119 data[a] = t;
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120 }
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121 }
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122
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123 /**
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124 *
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125 * @param ascending <code>true</code> to sort in ascending order, <code>false</code> for descending
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126 */
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127 public void sort(boolean ascending) {
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128 Arrays.sort(data, 0, count);
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129 if (!ascending) {
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130 reverse();
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131 }
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132 }
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133
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134
552
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135 @Override
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136 public String toString() {
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137 return String.format("%s[%d]", IntVector.class.getSimpleName(), size());
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138 }
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139
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140 @Override
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141 public IntVector clone() {
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142 try {
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143 return (IntVector) super.clone();
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144 } catch (CloneNotSupportedException ex) {
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145 throw new Error(ex);
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146 }
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147 }
288
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148
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149 /**
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150 * Use only when this instance won't be used any longer
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151 */
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152 int[] toArray(boolean internalIfSizeMatchCapacity) {
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153 if (count == data.length) {
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154 return data;
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155 }
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156 return toArray();
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157 }
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158
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159 private void grow(int newCapacityHint) {
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160 if (increment == 0) {
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161 throw new UnsupportedOperationException("This vector is not allowed to expand");
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162 }
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163 int newCapacity = increment < 0 ? data.length << 1 : (data.length + increment);
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164 if (newCapacityHint > 0 && newCapacity < newCapacityHint) {
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165 newCapacity = newCapacityHint;
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166 }
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167 assert newCapacity > 0 && newCapacity != data.length : newCapacity;
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168 int[] newData = new int[newCapacity];
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169 System.arraycopy(data, 0, newData, 0, count);
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170 data = newData;
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171 }
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172 }