src/idom/IDNodeVector.cpp

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
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 *
 * 5. Products derived from this software may not be called "Apache",
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
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/*
 * $Log$
 * Revision 1.6  2001/05/29 20:06:35  tng
 * IDOM: fix wrong void* p cast
 *
 * Revision 1.5  2001/05/29 18:49:57  tng
 * IDOM: call allocate directly for array allocation to avoid overloading operator new[] which leads to compilation error on SUN CC 4.2
 *
 * Revision 1.4  2001/05/23 13:11:39  tng
 * IDOM: Memory fix.
 *
 * Revision 1.3  2001/05/17 15:58:47  tng
 * IDOM: Add Unix build, and other idom udpates.
 *
 * Revision 1.2  2001/05/11 13:25:46  tng
 * Copyright update.
 *
 * Revision 1.1.1.1  2001/04/03 00:14:26  andyh
 * IDOM
 *
 */

//
//	file:   IDNodeVector.cpp
//			Implementation of class IDNodeVector.
//			(Use of STL vector, or equivalent, would have been nice,
//			but is not available.  'IDOM_Node *' is the only type
//			kept in Vectors in this DOM implementation, so this is
//			a hardwired implementation for that type.
//

#include "IDNodeVector.hpp"
#include "IDDocumentImpl.hpp"
#include <assert.h>

IDNodeVector::IDNodeVector(IDOM_Document *doc)
{
	init(doc, 10);
};

IDNodeVector::IDNodeVector(IDOM_Document *doc, unsigned int size) {
	init(doc, size);
};


void IDNodeVector::init(IDOM_Document *doc, unsigned int size) {
    assert(size > 0);
    //data = new (doc) IDOM_Node *[size];
    data = (IDOM_Node**) ((IDDocumentImpl *)doc)->allocate(sizeof(IDOM_Node*) * size);
    assert(data != 0);
    unsigned int i;
    for (i=0; i<size; i++)
        data[i] = 0;
    allocatedSize = size;
    nextFreeSlot = 0;
};


IDNodeVector::~IDNodeVector() {
};


void IDNodeVector::addElement(IDOM_Node *elem) {
	checkSpace();
	data[nextFreeSlot] = elem;
	++nextFreeSlot;
};


void IDNodeVector::checkSpace() {
    if (nextFreeSlot == allocatedSize) {
        unsigned int grow = allocatedSize/2;
        if (grow < 50) grow = 50;
        unsigned int newAllocatedSize = allocatedSize + grow;
        IDOM_Document *doc = data[0]->getOwnerDocument();

        //IDOM_Node **newData = new (doc) IDOM_Node *[newAllocatedSize];
        IDOM_Node **newData = (IDOM_Node**) ((IDDocumentImpl *)doc)->allocate(sizeof(IDOM_Node*) * newAllocatedSize);

        assert(newData != 0);
        for (unsigned int i=0; i<allocatedSize; i++) {
            newData[i] = data[i];
        };
        // delete [] data;  // idom_revisit.  Can't delete!  Recycle?
        allocatedSize = newAllocatedSize;
        data = newData;
    }
}

	
IDOM_Node *IDNodeVector::elementAt(unsigned int index) {
    if (index >= nextFreeSlot)
        return 0;
	return data[index];
};

IDOM_Node *IDNodeVector::lastElement() {
	if (nextFreeSlot == 0)
		return 0;
	return data[nextFreeSlot-1];
};


void IDNodeVector::insertElementAt(IDOM_Node *elem, unsigned int index) {
	unsigned int i;

	assert(index <= nextFreeSlot);

	checkSpace();
	for (i=nextFreeSlot; i>index; --i) {
		data[i] = data[i-1];
	}
	data[index] = elem;
	++nextFreeSlot;

};


void IDNodeVector::removeElementAt(unsigned int index) {
	assert(index < nextFreeSlot);
	for (unsigned int i=index; i<nextFreeSlot-1; ++i) {
		data[i] = data[i+1];
	}
	--nextFreeSlot;
};

void IDNodeVector::reset() {
	nextFreeSlot = 0;
};

void IDNodeVector::setElementAt(IDOM_Node *elem, unsigned int index) {
	assert(index < nextFreeSlot);
	data[index] = elem;
};


unsigned int IDNodeVector::size() {
	return nextFreeSlot;
};