| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.util.containers; |
| |
| |
| |
| public class HugeArray { |
| private Object[][] myRows; |
| private final int myRowBits; |
| private final int myColumnMask; |
| private int myMaxIndex = -1; |
| |
| public HugeArray(int rowBits) { |
| myRowBits = rowBits; |
| int rowLength = 1 << rowBits; |
| myRows = new Object[rowLength][]; |
| myColumnMask = rowLength - 1; |
| } |
| |
| public void put(int index, Object object) { |
| int rowIndex = calcRow(index); |
| Object[] row = myRows[rowIndex]; |
| if (row == null) { |
| row = new Object[myColumnMask + 1]; |
| myRows[rowIndex] = row; |
| } |
| row[calcColumn(index)] = object; |
| if (myMaxIndex < index) myMaxIndex = index; |
| } |
| |
| public Object get(int index) { |
| return myRows[calcRow(index)][calcColumn(index)]; |
| } |
| |
| public final int calcColumn(int index) { |
| return index & myColumnMask; |
| } |
| |
| public final int calcRow(int index) { |
| return index >> myRowBits; |
| } |
| |
| public int size() { |
| return myMaxIndex + 1; |
| } |
| |
| public Object[] toArray() { |
| return toArray(new Object[size()]); |
| } |
| |
| public Object[] toArray(Object[] array) { |
| int firstIndex = 0; |
| final int rowLength = myColumnMask + 1; |
| int lastRowToCopy = calcRow(array.length) + (calcColumn(array.length) == 0 ? 0 : 1); |
| for (int rowIndex = 0; rowIndex < lastRowToCopy; rowIndex++) { |
| System.arraycopy(myRows[rowIndex], 0, array, firstIndex, Math.min(array.length - firstIndex, rowLength)); |
| firstIndex += rowLength; |
| } |
| return array; |
| } |
| |
| public void add(Object object) { |
| put(myMaxIndex + 1, object); |
| } |
| } |