UCompactIntArray.java revision 0
4141N/A/*
4141N/A * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
4141N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4141N/A *
4141N/A * This code is free software; you can redistribute it and/or modify it
4141N/A * under the terms of the GNU General Public License version 2 only, as
4141N/A * published by the Free Software Foundation. Sun designates this
4141N/A * particular file as subject to the "Classpath" exception as provided
4141N/A * by Sun in the LICENSE file that accompanied this code.
4141N/A *
4141N/A * This code is distributed in the hope that it will be useful, but WITHOUT
4141N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4141N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
4141N/A * version 2 for more details (a copy is included in the LICENSE file that
4141N/A * accompanied this code).
4141N/A *
4141N/A * You should have received a copy of the GNU General Public License version
4141N/A * 2 along with this work; if not, write to the Free Software Foundation,
4141N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
4141N/A *
4141N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
4141N/A * CA 95054 USA or visit www.sun.com if you need additional information or
4141N/A * have any questions.
4141N/A */
4141N/A
4141N/Apackage sun.text;
4141N/A
4141N/Apublic final class UCompactIntArray implements Cloneable {
4141N/A /**
4141N/A * Default constructor for UCompactIntArray, the default value of the
4141N/A * compact array is 0.
4141N/A */
4141N/A public UCompactIntArray() {
4141N/A values = new int[16][];
4346N/A indices = new short[16][];
4346N/A blockTouched = new boolean[16][];
4141N/A planeTouched = new boolean[16];
4141N/A }
4141N/A
4141N/A public UCompactIntArray(int defaultValue) {
4141N/A this();
4141N/A this.defaultValue = defaultValue;
4141N/A }
4141N/A
4141N/A /**
4141N/A * Get the mapped value of a Unicode character.
4141N/A * @param index the character to get the mapped value with
4141N/A * @return the mapped value of the given character
4141N/A */
4141N/A public int elementAt(int index) {
4141N/A int plane = (index & PLANEMASK) >> PLANESHIFT;
4346N/A if (!planeTouched[plane]) {
4346N/A return defaultValue;
4141N/A }
4141N/A index &= CODEPOINTMASK;
4141N/A return values[plane][(indices[plane][index >> BLOCKSHIFT] & 0xFFFF)
4141N/A + (index & BLOCKMASK)];
4141N/A }
4141N/A
4141N/A
4141N/A /**
4141N/A * Set a new value for a Unicode character.
4141N/A * Set automatically expands the array if it is compacted.
4141N/A * @param index the character to set the mapped value with
4141N/A * @param value the new mapped value
4141N/A */
4141N/A public void setElementAt(int index, int value) {
4141N/A if (isCompact) {
4141N/A expand();
4141N/A }
4141N/A int plane = (index & PLANEMASK) >> PLANESHIFT;
4141N/A if (!planeTouched[plane]) {
4141N/A initPlane(plane);
4141N/A }
4141N/A index &= CODEPOINTMASK;
4141N/A values[plane][index] = value;
4346N/A blockTouched[plane][index >> BLOCKSHIFT] = true;
4346N/A }
4141N/A
4141N/A
4141N/A /**
4141N/A * Compact the array.
4141N/A */
4141N/A public void compact() {
4141N/A if (isCompact) {
4141N/A return;
4141N/A }
4141N/A for (int plane = 0; plane < PLANECOUNT; plane++) {
4141N/A if (!planeTouched[plane]) {
4141N/A continue;
4141N/A }
4141N/A int limitCompacted = 0;
4141N/A int iBlockStart = 0;
4141N/A short iUntouched = -1;
4141N/A
4141N/A for (int i = 0; i < indices[plane].length; ++i, iBlockStart += BLOCKCOUNT) {
4141N/A indices[plane][i] = -1;
4141N/A if (!blockTouched[plane][i] && iUntouched != -1) {
4141N/A // If no values in this block were set, we can just set its
4141N/A // index to be the same as some other block with no values
4141N/A // set, assuming we've seen one yet.
4141N/A indices[plane][i] = iUntouched;
4141N/A } else {
4141N/A int jBlockStart = limitCompacted * BLOCKCOUNT;
4141N/A if (i > limitCompacted) {
4141N/A System.arraycopy(values[plane], iBlockStart,
4141N/A values[plane], jBlockStart, BLOCKCOUNT);
4141N/A }
4141N/A if (!blockTouched[plane][i]) {
4141N/A // If this is the first untouched block we've seen, remember it.
4141N/A iUntouched = (short)jBlockStart;
4141N/A }
4141N/A indices[plane][i] = (short)jBlockStart;
4141N/A limitCompacted++;
4141N/A }
4141N/A }
4346N/A
4346N/A // we are done compacting, so now make the array shorter
4141N/A int newSize = limitCompacted * BLOCKCOUNT;
4141N/A int[] result = new int[newSize];
4141N/A System.arraycopy(values[plane], 0, result, 0, newSize);
4141N/A values[plane] = result;
4141N/A blockTouched[plane] = null;
4141N/A }
4141N/A isCompact = true;
4141N/A }
// --------------------------------------------------------------
// private
// --------------------------------------------------------------
/**
* Expanded takes the array back to a 0x10ffff element array
*/
private void expand() {
int i;
if (isCompact) {
int[] tempArray;
for (int plane = 0; plane < PLANECOUNT; plane++) {
if (!planeTouched[plane]) {
continue;
}
blockTouched[plane] = new boolean[INDEXCOUNT];
tempArray = new int[UNICODECOUNT];
for (i = 0; i < UNICODECOUNT; ++i) {
tempArray[i] = values[plane][indices[plane][i >> BLOCKSHIFT]
& 0xffff + (i & BLOCKMASK)];
blockTouched[plane][i >> BLOCKSHIFT] = true;
}
for (i = 0; i < INDEXCOUNT; ++i) {
indices[plane][i] = (short)(i<<BLOCKSHIFT);
}
values[plane] = tempArray;
}
isCompact = false;
}
}
private void initPlane(int plane) {
values[plane] = new int[UNICODECOUNT];
indices[plane] = new short[INDEXCOUNT];
blockTouched[plane] = new boolean[INDEXCOUNT];
planeTouched[plane] = true;
if (planeTouched[0] && plane != 0) {
System.arraycopy(indices[0], 0, indices[plane], 0, INDEXCOUNT);
} else {
for (int i = 0; i < INDEXCOUNT; ++i) {
indices[plane][i] = (short)(i<<BLOCKSHIFT);
}
}
for (int i = 0; i < UNICODECOUNT; ++i) {
values[plane][i] = defaultValue;
}
}
public int getKSize() {
int size = 0;
for (int plane = 0; plane < PLANECOUNT; plane++) {
if (planeTouched[plane]) {
size += (values[plane].length * 4 + indices[plane].length * 2);
}
}
return size / 1024;
}
private static final int PLANEMASK = 0x30000;
private static final int PLANESHIFT = 16;
private static final int PLANECOUNT = 0x10;
private static final int CODEPOINTMASK = 0xffff;
private static final int UNICODECOUNT = 0x10000;
private static final int BLOCKSHIFT = 7;
private static final int BLOCKCOUNT = (1<<BLOCKSHIFT);
private static final int INDEXSHIFT = (16-BLOCKSHIFT);
private static final int INDEXCOUNT = (1<<INDEXSHIFT);
private static final int BLOCKMASK = BLOCKCOUNT - 1;
private int defaultValue;
private int values[][];
private short indices[][];
private boolean isCompact;
private boolean[][] blockTouched;
private boolean[] planeTouched;
};