108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is [Open Source Virtual Machine.].
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*
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* The Initial Developer of the Original Code is
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* Adobe System Incorporated.
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* Portions created by the Initial Developer are Copyright (C) 2004-2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Adobe AS3 Team
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __avmplus_Stack__
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#define __avmplus_Stack__
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namespace avmplus
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{
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/**
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* The Stack<T> template implements a simple stack, which can
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* be templated to support different types.
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*/
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template <class T>
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class Stack
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{
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public:
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enum { kInitialCapacity = 128 };
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Stack()
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{
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data = new T[kInitialCapacity];
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len = 0;
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max = kInitialCapacity;
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}
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virtual ~Stack()
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{
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delete [] data;
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}
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void add(T value)
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{
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if (len >= max) {
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grow();
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}
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data[len++] = value;
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}
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bool isEmpty()
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{
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return len == 0;
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}
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T pop()
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{
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return data[--len];
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}
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void reset()
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{
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len = 0;
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}
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int size()
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{
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return len;
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}
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private:
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T *data;
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int len;
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int max;
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void grow()
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{
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int newMax = max * 5 / 4;
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T *newData = new T[newMax];
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for (int i=0; i<len; i++) {
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newData[i] = data[i];
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}
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delete [] data;
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data = newData;
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max = newMax;
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}
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};
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}
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#endif /* __avmplus_Stack__ */
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