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* The Apache Software License, Version 1.1
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* Copyright (c) 2000-2002 The Apache Software Foundation.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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* 4. The names "Xerces" and "Apache Software Foundation" must
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* not be used to endorse or promote products derived from this
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* software without prior written permission. For written
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* permission, please contact apache@apache.org.
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* 5. Products derived from this software may not be called "Apache",
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* nor may "Apache" appear in their name, without prior written
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* permission of the Apache Software Foundation.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* ====================================================================
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation and was
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* originally based on software copyright (c) 1999, International
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* Business Machines, Inc., http://www.apache.org. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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package org.apache.xerces.util;
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* A simple integer based stack.
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* moved to org.apache.xerces.util by neilg to support the
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* @author Andy Clark, IBM
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* @version $Id: IntStack.java,v 1.4 2003/10/17 18:14:30 mrglavas Exp $
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public final class IntStack {
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/** Returns the size of the stack. */
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/** Pushes a value onto the stack. */
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public void push(int value) {
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ensureCapacity(fDepth + 1);
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fData[fDepth++] = value;
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/** Peeks at the top of the stack. */
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return fData[fDepth - 1];
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/** Returns the element at the specified depth in the stack. */
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public int elementAt(int depth) {
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/** Pops a value off of the stack. */
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return fData[--fDepth];
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/** Clears the stack. */
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public void clear() {
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/** Prints the stack. */
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public void print() {
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System.out.print('(');
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System.out.print(fDepth);
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System.out.print(") {");
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for (int i = 0; i < fDepth; i++) {
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System.out.print(" ...");
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System.out.print(' ');
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System.out.print(fData[i]);
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if (i < fDepth - 1) {
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System.out.print(',');
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System.out.print(" }");
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System.out.println();
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/** Ensures capacity. */
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private void ensureCapacity(int size) {
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else if (fData.length <= size) {
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int[] newdata = new int[fData.length * 2];
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System.arraycopy(fData, 0, newdata, 0, fData.length);