--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v0.5
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.internal.compiler.codegen;
+
+public class FloatCache {
+ private float keyTable[];
+ private int valueTable[];
+ private int elementSize;
+/**
+ * Constructs a new, empty hashtable. A default capacity and
+ * load factor is used. Note that the hashtable will automatically
+ * grow when it gets full.
+ */
+public FloatCache() {
+ this(13);
+}
+/**
+ * Constructs a new, empty hashtable with the specified initial
+ * capacity.
+ * @param initialCapacity int
+ * the initial number of buckets
+ */
+public FloatCache(int initialCapacity) {
+ elementSize = 0;
+ keyTable = new float[initialCapacity];
+ valueTable = new int[initialCapacity];
+}
+/**
+ * Clears the hash table so that it has no more elements in it.
+ */
+public void clear() {
+ for (int i = keyTable.length; --i >= 0;) {
+ keyTable[i] = 0.0f;
+ valueTable[i] = 0;
+ }
+ elementSize = 0;
+}
+/** Returns true if the collection contains an element for the key.
+ *
+ * @param key <CODE>float</CODE> the key that we are looking for
+ * @return boolean
+ */
+public boolean containsKey(float key) {
+ if (key == 0.0f) {
+ for (int i = 0, max = elementSize; i < max; i++) {
+ if (keyTable[i] == 0.0f) {
+ int value1 = Float.floatToIntBits(key);
+ int value2 = Float.floatToIntBits(keyTable[i]);
+ if (value1 == -2147483648 && value2 == -2147483648)
+ return true;
+ if (value1 == 0 && value2 == 0)
+ return true;
+ }
+ }
+ } else {
+ for (int i = 0, max = elementSize; i < max; i++) {
+ if (keyTable[i] == key) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+/** Gets the object associated with the specified key in the
+ * hashtable.
+ * @param key <CODE>float</CODE> the specified key
+ * @return int the element for the key or -1 if the key is not
+ * defined in the hash table.
+ */
+public int get(float key) {
+ if (key == 0.0f) {
+ for (int i = 0, max = elementSize; i < max; i++) {
+ if (keyTable[i] == 0.0f) {
+ int value1 = Float.floatToIntBits(key);
+ int value2 = Float.floatToIntBits(keyTable[i]);
+ if (value1 == -2147483648 && value2 == -2147483648)
+ return valueTable[i];
+ if (value1 == 0 && value2 == 0)
+ return valueTable[i];
+ }
+ }
+ } else {
+ for (int i = 0, max = elementSize; i < max; i++) {
+ if (keyTable[i] == key) {
+ return valueTable[i];
+ }
+ }
+ }
+ return -1;
+}
+/**
+ * Puts the specified element into the hashtable, using the specified
+ * key. The element may be retrieved by doing a get() with the same key.
+ *
+ * @param key <CODE>float</CODE> the specified key in the hashtable
+ * @param value <CODE>int</CODE> the specified element
+ * @return int value
+ */
+public int put(float key, int value) {
+ if (elementSize == keyTable.length) {
+ // resize
+ System.arraycopy(keyTable, 0, (keyTable = new float[elementSize * 2]), 0, elementSize);
+ System.arraycopy(valueTable, 0, (valueTable = new int[elementSize * 2]), 0, elementSize);
+ }
+ keyTable[elementSize] = key;
+ valueTable[elementSize] = value;
+ elementSize++;
+ return value;
+}
+/**
+ * Converts to a rather lengthy String.
+ *
+ * @return String the ascii representation of the receiver
+ */
+public String toString() {
+ int max = elementSize;
+ StringBuffer buf = new StringBuffer();
+ buf.append("{"); //$NON-NLS-1$
+ for (int i = 0; i < max; ++i) {
+ if ((keyTable[i] != 0) || ((keyTable[i] == 0) && (valueTable[i] != 0))) {
+ buf.append(keyTable[i]).append("->").append(valueTable[i]); //$NON-NLS-1$
+ }
+ if (i < max) {
+ buf.append(", "); //$NON-NLS-1$
+ }
+ }
+ buf.append("}"); //$NON-NLS-1$
+ return buf.toString();
+}
+}