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Diffstat (limited to 'src/solaris/classes/sun/java2d/xr/GrowableIntArray.java')
-rw-r--r-- | src/solaris/classes/sun/java2d/xr/GrowableIntArray.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/solaris/classes/sun/java2d/xr/GrowableIntArray.java b/src/solaris/classes/sun/java2d/xr/GrowableIntArray.java new file mode 100644 index 000000000..12c03622c --- /dev/null +++ b/src/solaris/classes/sun/java2d/xr/GrowableIntArray.java @@ -0,0 +1,114 @@ +/* + * Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Sun designates this + * particular file as subject to the "Classpath" exception as provided + * by Sun in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + */ + +package sun.java2d.xr; + +import java.util.*; + +/** + * Growable int array, designed to allow subclasses to emulate + * the behaviour of value types. + * + * @author Clemens Eisserer + */ + +public class GrowableIntArray { + + int[] array; + int size; + int cellSize; + + public GrowableIntArray(int cellSize, int initialSize) { + array = new int[initialSize]; + size = 0; + this.cellSize = cellSize; + } + + private int getNextCellIndex() { + int oldSize = size; + size += cellSize; + + if (size >= array.length) { + growArray(); + } + + return oldSize; + } + + /** + * @return a direct reference to the backing array. + */ + public int[] getArray() { + return array; + } + + /** + * @return a copy of the backing array. + */ + public int[] getSizedArray() { + return Arrays.copyOf(array, getSize()); + } + + /** + * Returns the index of the next free cell, + * and grows the backing arrays if required. + */ + public final int getNextIndex() { + return getNextCellIndex() / cellSize; + } + + protected final int getCellIndex(int cellIndex) { + return cellSize * cellIndex; + } + + public final int getInt(int cellIndex) { + return array[cellIndex]; + } + + public final void addInt(int i) { + int nextIndex = getNextIndex(); + array[nextIndex] = i; + } + + /** + * @return The number of stored cells. + */ + public final int getSize() { + return size / cellSize; + } + + public void clear() { + size = 0; + } + + protected void growArray() { + int newSize = Math.max(array.length * 2, 10); + int[] oldArray = array; + array = new int[newSize]; + + System.arraycopy(oldArray, 0, array, 0, oldArray.length); + } + +} |