Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/IntMap.java @ 331:a37ce7145c3f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Access to repository configuration
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 05 Nov 2011 04:21:18 +0100
parents 81e9a3c9bafe
children ee8264d80747 2e402c12ebc6
rev   line source
276
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2011 TMate Software Ltd
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.util.NoSuchElementException;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22 /**
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 * Map implementation that uses plain int keys and performs with log n effectiveness.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 *
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 * @author Artem Tikhomirov
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 * @author TMate Software Ltd.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 */
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 public class IntMap<V> {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 private int[] keys;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 private Object[] values;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 private int size;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 public IntMap(int size) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 keys = new int[size <= 0 ? 16 : size];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36 values = new Object[keys.length];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
38
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
39 public int size() {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 return size;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
42
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43 public int firstKey() {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44 if (size == 0) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 throw new NoSuchElementException();
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
46 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 return keys[0];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
49
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50 public int lastKey() {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 if (size == 0) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 throw new NoSuchElementException();
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
54 return keys[size-1];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
55 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 public void trimToSize() {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58 if (size < keys.length) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
59 int[] newKeys = new int[size];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
60 Object[] newValues = new Object[size];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
61 System.arraycopy(keys, 0, newKeys, 0, size);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
62 System.arraycopy(values, 0, newValues, 0, size);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
63 keys = newKeys;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64 values = newValues;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
66 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 public void put(int key, V value) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69 int ix = binarySearch(keys, size, key);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 if (ix < 0) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 final int insertPoint = -ix - 1;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 assert insertPoint <= size; // can't be greater, provided binarySearch didn't malfunction.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73 if (size == keys.length) {
278
55fad5e0e98b Ensure capacity grows regardless of initial map size. Separate unit test
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 276
diff changeset
74 int capInc = size >>> 2; // +25%
55fad5e0e98b Ensure capacity grows regardless of initial map size. Separate unit test
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 276
diff changeset
75 int newCapacity = size + (capInc < 2 ? 2 : capInc) ;
276
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
76 int[] newKeys = new int[newCapacity];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
77 Object[] newValues = new Object[newCapacity];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
78 System.arraycopy(keys, 0, newKeys, 0, insertPoint);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
79 System.arraycopy(keys, insertPoint, newKeys, insertPoint+1, keys.length - insertPoint);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
80 System.arraycopy(values, 0, newValues, 0, insertPoint);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
81 System.arraycopy(values, insertPoint, newValues, insertPoint+1, values.length - insertPoint);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
82 keys = newKeys;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
83 values = newValues;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
84 } else {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
85 // arrays got enough capacity
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
86 if (insertPoint != size) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
87 System.arraycopy(keys, insertPoint, keys, insertPoint+1, keys.length - insertPoint - 1);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
88 System.arraycopy(values, insertPoint, values, insertPoint+1, values.length - insertPoint - 1);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
89 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
90 // else insertPoint is past known elements, no need to copy arrays
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
91 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
92 keys[insertPoint] = key;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
93 values[insertPoint] = value;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
94 size++;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
95 } else {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
96 values[ix] = value;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
97 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
98 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
99
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
100 public boolean containsKey(int key) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
101 return binarySearch(keys, size, key) >= 0;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
102 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
103
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
104 @SuppressWarnings("unchecked")
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
105 public V get(int key) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
106 int ix = binarySearch(keys, size, key);
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
107 if (ix >= 0) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
108 return (V) values[ix];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
109 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
110 return null;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
111 }
281
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
112
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
113 public void remove(int key) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
114 int ix = binarySearch(keys, size, key);
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
115 if (ix >= 0) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
116 if (ix <= size - 1) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
117 System.arraycopy(keys, ix+1, keys, ix, size - ix - 1);
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
118 System.arraycopy(values, ix+1, values, ix, size - ix - 1);
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
119 } // if ix points to last element, no reason to attempt a copy
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
120 size--;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
121 keys[size] = 0;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
122 values[size] = null;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
123 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
124 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
125
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
126 /**
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
127 * Forget first N entries (in natural order) in the map.
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
128 */
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
129 @Experimental
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
130 public void removeFromStart(int count) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
131 if (count > 0 && count <= size) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
132 if (count < size) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
133 System.arraycopy(keys, count, keys, 0, size - count);
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
134 System.arraycopy(values, count, values, 0, size - count);
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
135 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
136 for (int i = size - count; i < size; i++) {
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
137 keys[i] = 0;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
138 values[i] = null;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
139 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
140 size -= count;
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
141 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
142 }
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
143
81e9a3c9bafe Utilize IntMap when caching manifest revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 278
diff changeset
144
276
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
145
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
146 // copy of Arrays.binarySearch, with upper search limit as argument
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
147 private static int binarySearch(int[] a, int high, int key) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 int low = 0;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
149 high--;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
150
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
151 while (low <= high) {
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
152 int mid = (low + high) >> 1;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
153 int midVal = a[mid];
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
154
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
155 if (midVal < key)
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
156 low = mid + 1;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
157 else if (midVal > key)
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
158 high = mid - 1;
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
159 else
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
160 return mid; // key found
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
161 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
162 return -(low + 1); // key not found.
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
163 }
6355ecda1f08 Tailored Map implementation with int keys
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
164 }