зеркало из https://github.com/mozilla/pjs.git
272 строки
7.0 KiB
C++
272 строки
7.0 KiB
C++
/*
|
|
* The contents of this file are subject to the Mozilla Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is TransforMiiX XSLT processor.
|
|
*
|
|
* The Initial Developer of the Original Code is The MITRE Corporation.
|
|
* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
|
|
*
|
|
* Portions created by Keith Visco as a Non MITRE employee,
|
|
* (C) 1999 Keith Visco. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Keith Visco, kvisco@ziplink.net
|
|
* -- original author.
|
|
*
|
|
* Larry Fitzpatrick, OpenText, lef@opentext.com
|
|
* -- moved initialization of DEFAULT_SIZE from NodeStack.h to here
|
|
*
|
|
* $Id: NodeStack.cpp,v 1.2 1999-11-15 07:13:16 nisheeth%netscape.com Exp $
|
|
*/
|
|
|
|
#include "NodeStack.h"
|
|
#include <iostream.h>
|
|
|
|
/**
|
|
* @author <a href="kvisco@ziplink.net">Keith Visco</a>
|
|
* @version $Revision: 1.2 $ $Date: 1999-11-15 07:13:16 $
|
|
**/
|
|
|
|
|
|
//-------------/
|
|
//- Constants -/
|
|
//-------------/
|
|
const int NodeStack::DEFAULT_SIZE = 25;
|
|
|
|
//----------------/
|
|
//- Constructors -/
|
|
//----------------/
|
|
|
|
/**
|
|
* Creates a new NodeStack with the default Size
|
|
**/
|
|
NodeStack::NodeStack() {
|
|
initialize(DEFAULT_SIZE);
|
|
} //-- NodeStack
|
|
|
|
/**
|
|
* Creates a new NodeStack with the specified size
|
|
**/
|
|
NodeStack::NodeStack(int size) {
|
|
initialize(size);
|
|
} //-- NodeStack
|
|
|
|
/**
|
|
* Helper method for Constructors
|
|
**/
|
|
void NodeStack::initialize(int size) {
|
|
elements = new Node*[size];
|
|
elementCount = 0;
|
|
bufferSize = size;
|
|
initialSize = size;
|
|
} //-- initialize
|
|
|
|
/**
|
|
* Destructor for NodeSet
|
|
**/
|
|
NodeStack::~NodeStack() {
|
|
delete [] elements;
|
|
} //-- ~NodeStack
|
|
|
|
/**
|
|
* Returns the specified Node from the top of this Stack,
|
|
* without removing it from the stack.
|
|
* @param node the Node to add to the top of the Stack
|
|
* @return a pointer to the Node that is the top of this Stack
|
|
**/
|
|
Node* NodeStack::peek() {
|
|
return get(size()-1);
|
|
} //-- peek
|
|
|
|
/**
|
|
* Removes the specified Node from the top of this Stack.
|
|
* @param node the Node to add to the top of the Stack
|
|
* @return a pointer to the Node that was the top of this Stack
|
|
**/
|
|
Node* NodeStack::pop() {
|
|
return remove(size()-1);
|
|
} //-- pop
|
|
|
|
/**
|
|
* Adds the specified Node to the top of this Stack.
|
|
* @param node the Node to add to the top of the Stack
|
|
**/
|
|
void NodeStack::push(Node* node) {
|
|
if (elementCount == bufferSize) increaseSize();
|
|
elements[elementCount++] = node;
|
|
} //-- push
|
|
|
|
|
|
/**
|
|
* Removes all elements from the Stack
|
|
**/
|
|
void NodeStack::clear() {
|
|
for (int i = 0; i < elementCount; i++) {
|
|
elements[i] = 0;
|
|
}
|
|
elementCount = 0;
|
|
} //-- clear
|
|
|
|
/**
|
|
* Returns true if the specified Node is contained in the Stack.
|
|
* if the specfied Node is null, then if the NodeStack contains a null
|
|
* value, true will be returned.
|
|
* @param node the element to search the NodeStack for
|
|
* @return true if specified Node is contained in the NodeStack
|
|
**/
|
|
MBool NodeStack::contains(Node* node) {
|
|
cout << "NodeStack#contains [enter]\n";
|
|
MBool retVal = (indexOf(node) >= 0) ? MB_TRUE : MB_FALSE;
|
|
cout << "NodeStack#contains [exit]\n";
|
|
return retVal;
|
|
|
|
} //-- contains
|
|
|
|
/**
|
|
* Compares the specified NodeStack with this NodeStack for equality.
|
|
* Returns true if and only if the specified NodeStack is the same
|
|
* size as this NodeSet and all of its associated
|
|
* Nodes are contained within this NodeStack in the same order.
|
|
* @return true if and only if the specified NodeStack is the
|
|
* same size as this NodeStack and all of its associated
|
|
* Nodes are contained within this NodeStack in the same order.
|
|
**/
|
|
MBool NodeStack::equals(NodeStack* nodeStack) {
|
|
if (!nodeStack) return MB_FALSE;
|
|
if (nodeStack->size() != size()) return MB_FALSE;
|
|
|
|
for (int i = 0; i < size(); i++) {
|
|
if (nodeStack->get(i) != get(i)) return MB_FALSE;
|
|
}
|
|
return MB_TRUE;
|
|
} //-- equals
|
|
|
|
/**
|
|
* Returns the Node at the specified position in this NodeStack.
|
|
* @param index the position of the Node to return
|
|
**/
|
|
Node* NodeStack::get(int index) {
|
|
if ((index < 0) || index >= elementCount) return 0;
|
|
return elements[index];
|
|
} //-- get
|
|
|
|
|
|
/**
|
|
* Returns the index of the specified Node,
|
|
* or -1 if the Node is not contained in the NodeStack
|
|
* @param node the Node to get the index for
|
|
**/
|
|
int NodeStack::indexOf(Node* node) {
|
|
|
|
for (int i = 0; i < elementCount; i++) {
|
|
if (node == elements[i]) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
} //-- indexOf
|
|
|
|
/**
|
|
* Returns true if there are no Nodes in the NodeStack.
|
|
* @return true if there are no Nodes in the NodeStack.
|
|
**/
|
|
MBool NodeStack::isEmpty() {
|
|
return (elementCount == 0) ? MB_TRUE : MB_FALSE;
|
|
} //-- isEmpty
|
|
|
|
/**
|
|
* Removes the Node at the specified index from the NodeStack
|
|
* @param index the position in the NodeStack to remove the Node from
|
|
* @return the Node that was removed from the NodeStack
|
|
**/
|
|
Node* NodeStack::remove(int index) {
|
|
|
|
if ((index < 0) || (index > elementCount)) return 0;
|
|
Node* node = elements[index];
|
|
shiftDown(index+1);
|
|
--elementCount;
|
|
return node;
|
|
} //-- remove
|
|
|
|
/**
|
|
* Removes the the specified Node from the NodeStack
|
|
* @param node the Node to remove from the NodeStack
|
|
* @return true if the Node was removed from the list
|
|
**/
|
|
MBool NodeStack::remove(Node* node) {
|
|
int index = indexOf(node);
|
|
|
|
if (index > -1) {
|
|
remove(index);
|
|
}
|
|
else return MB_FALSE;
|
|
|
|
return MB_TRUE;
|
|
} //-- remove
|
|
|
|
|
|
/**
|
|
* Returns the number of elements in the NodeStack
|
|
* @return the number of elements in the NodeStack
|
|
**/
|
|
int NodeStack::size() {
|
|
return elementCount;
|
|
} //-- size
|
|
|
|
//-------------------/
|
|
//- Private Methods -/
|
|
//-------------------/
|
|
|
|
/**
|
|
* increase the NodeStack capacity by a factor of its initial size
|
|
**/
|
|
void NodeStack::increaseSize() {
|
|
|
|
bufferSize += bufferSize;
|
|
Node** tmpNodes = elements;
|
|
elements = new Node*[bufferSize];
|
|
for (int i=0;i < elementCount; i++) {
|
|
elements[i] = tmpNodes[i];
|
|
}
|
|
delete [] tmpNodes;
|
|
|
|
} //-- increaseSize
|
|
|
|
/**
|
|
* Shifts all elements at the specified index to down by 1
|
|
**/
|
|
void NodeStack::shiftDown(int index) {
|
|
if ((index <= 0) || (index >= elementCount)) return;
|
|
|
|
//-- from Java
|
|
//-- System.arraycopy(elements, index, elements, index - 1, elementCount - index);
|
|
for (int i = index; i < elementCount; i++) {
|
|
elements[index-1] = elements[index];
|
|
}
|
|
|
|
elements[elementCount-1] = 0;
|
|
} //-- shiftDown
|
|
|
|
/**
|
|
* Shifts all elements at the specified index up by 1
|
|
**/
|
|
void NodeStack::shiftUp(int index) {
|
|
if (index == elementCount) return;
|
|
if (elementCount == bufferSize) increaseSize();
|
|
|
|
//-- from Java
|
|
//-- System.arraycopy(elements, index, elements, index + 1, elementCount - index);
|
|
for (int i = elementCount; i > index; i--) {
|
|
elements[i] = elements[i-1];
|
|
}
|
|
} //-- shiftUp
|
|
|