X-Git-Url: http://git.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/util/HashtableOfLong.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/util/HashtableOfLong.java
new file mode 100644
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--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/util/HashtableOfLong.java
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.compiler.util;
+ 
+ /**
+  *	Hashtable for non-zero long keys.
+  */
+  
+public final class HashtableOfLong {
+	// to avoid using Enumerations, walk the individual tables skipping nulls
+	public long[] keyTable;
+	public Object[] valueTable;
+
+	int elementSize; // number of elements in the table
+	int threshold;
+public HashtableOfLong() {
+	this(13);
+}
+public HashtableOfLong(int size) {
+	this.elementSize = 0;
+	this.threshold = size; // size represents the expected number of elements
+	int extraRoom = (int) (size * 1.75f);
+	if (this.threshold == extraRoom)
+		extraRoom++;
+	this.keyTable = new long[extraRoom];
+	this.valueTable = new Object[extraRoom];
+}
+public boolean containsKey(long key) {
+	int index = ((int)(key >>> 32)) % valueTable.length;
+	long currentKey;
+	while ((currentKey = keyTable[index]) != 0) {
+		if (currentKey == key)
+			return true;
+		index = (index + 1) % keyTable.length;
+	}
+	return false;
+}
+public Object get(long key) {
+	int index = ((int)(key >>> 32)) % valueTable.length;
+	long currentKey;
+	while ((currentKey = keyTable[index]) != 0) {
+		if (currentKey == key)  return valueTable[index];
+		index = (index + 1) % keyTable.length;
+	}
+	return null;
+}
+public Object put(long key, Object value) {
+	int index = ((int)(key >>> 32)) % valueTable.length;
+	long currentKey;
+	while ((currentKey = keyTable[index]) != 0) {
+		if (currentKey == key)  return valueTable[index] = value;
+		index = (index + 1) % keyTable.length;
+	}
+	keyTable[index] = key;
+	valueTable[index] = value;
+
+	// assumes the threshold is never equal to the size of the table
+	if (++elementSize > threshold)
+		rehash();
+	return value;
+}
+private void rehash() {
+	HashtableOfLong newHashtable = new HashtableOfLong(elementSize * 2); // double the number of expected elements
+	long currentKey;
+	for (int i = keyTable.length; --i >= 0;)
+		if ((currentKey = keyTable[i]) != 0)
+			newHashtable.put(currentKey, valueTable[i]);
+
+	this.keyTable = newHashtable.keyTable;
+	this.valueTable = newHashtable.valueTable;
+	this.threshold = newHashtable.threshold;
+}
+public int size() {
+	return elementSize;
+}
+public String toString() {
+	String s = ""; //$NON-NLS-1$
+	Object object;
+	for (int i = 0, length = valueTable.length; i < length; i++)
+		if ((object = valueTable[i]) != null)
+			s += keyTable[i] + " -> " + object.toString() + "\n"; //$NON-NLS-2$ //$NON-NLS-1$
+	return s;
+}
+}