hxstack.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxstack.cpp,v 1.2.36.3 2004/07/09 01:45:59 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
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 * ***** END LICENSE BLOCK ***** */

#include "hxstack.h"
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif


CHXStack::CHXStack(void) : CHXPtrArray()
{
	top = GetSize();
	zero = top;
}

	//virtual ~CHXStack(void) {};
void * CHXStack::Pop() {
	if (top > zero)
	{
		void * retval = ElementAt(--top);
        RemoveAt(top);
        return retval;        
	} else
	{
		return (void *)0;		
	}
}
		
void CHXStack::Push(void * Pushee)
{
	InsertAt(top++, Pushee); 
}

void *
CHXStack::TopOfStack()
{
    void* pPtr = NULL;
    if(top > zero)
    {
	pPtr = ElementAt(top - 1);
    }
    return pPtr;
}