update.cpp

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// Update.cpp: implementation of the CUpdate class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Database.h"
#include "Update.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CUpdate::CUpdate()
{
    current=0;  
}

CUpdate::~CUpdate()
{
    delete []up_itms;
}

CUpdate::CUpdate(WORD Num):UpNum(Num)
{
	current=0;
    this->up_itms=new UpdateItem[UpNum];
}

BOOL CUpdate::AddUpItem(WORD attr_idx, CString v)
{
    if(current>=UpNum)
		return FALSE;
	else
	{
		up_itms[current++]=UpdateItem(attr_idx,v);
		return TRUE;
	}
}



CUpdate & CUpdate::operator =(CUpdate &up)
{
	delete []up_itms;
    this->UpNum=up.UpNum;
    this->current=up.current;
	this->up_itms=new UpdateItem[UpNum];
	WORD i;
	for(i=0;i<current;i++)
		up_itms[i]=up.up_itms[i];

	return *this;
}

CUpdate::CUpdate(CUpdate &up)
{
    this->UpNum=up.UpNum;
    this->current=up.current;
	this->up_itms=new UpdateItem[UpNum];
	WORD i;
	for(i=0;i<current;i++)
		up_itms[i]=up.up_itms[i];
}

bool CUpdate::IsUpdated(WORD AttrNo)
{
    for(WORD i=0;i<current;i++)
	{
		if(up_itms[i].index==AttrNo)
			return true;
	}
	return false;
}