strstore.cpp

WinCE下文字滚动的实例

// StrStore.cpp: implementation of the CStrStore class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "StrStore.h"

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

CStrStore::CStrStore()
{
	m_pFirstData = NULL;
	m_pEndData = NULL;
	m_iAmount = 0;
}

CStrStore::~CStrStore()
{
	DeleteAllData();
}


//----------------------------------------------------------------------
//Description:
//	Add the TCHAR string
//----------------------------------------------------------------------
BOOL CStrStore::Add(const TCHAR * pszIn)
{
	PSTOREDATA pNewData = new STOREDATA();
	
	if(pNewData == NULL)
	{
		return FALSE;
	}

	int iLen = _tcslen(pszIn);
	pNewData->pszString = new TCHAR [iLen + 1];
	if(pNewData->pszString == NULL)
	{
		delete pNewData;
		return FALSE;
	}
	_tcscpy(pNewData->pszString,pszIn);
	
	
	pNewData->pNextData = NULL;

	if(m_pFirstData == NULL)
	{
		m_pFirstData = pNewData;
	}
	else
	{
		m_pEndData->pNextData = pNewData;
	}

	m_pEndData = pNewData;

	m_iAmount ++;

	return TRUE;
}


//----------------------------------------------------------------------
//Description:
//	Delete all the stored data
//----------------------------------------------------------------------
void CStrStore::DeleteAllData()
{
	if(m_pFirstData == NULL)
	{
		return ;
	}

	PSTOREDATA pDeleteData = m_pFirstData;

	while(m_pFirstData->pNextData != NULL)
	{
		m_pFirstData = m_pFirstData->pNextData;

		delete []pDeleteData->pszString;
		delete pDeleteData;
		
		pDeleteData = m_pFirstData;
	}

	//Delete the last one
	delete pDeleteData;

	m_pFirstData = NULL;
	m_pEndData = NULL;

	m_iAmount = 0;
}


//----------------------------------------------------------------------
//Description:
//	Get the amount
//----------------------------------------------------------------------
int CStrStore::GetAmount()
{
	return m_iAmount;
}


//----------------------------------------------------------------------
//Description:
//	Get the data base on the index. And the begin index is 0.
//----------------------------------------------------------------------
BOOL CStrStore::GetData(int iIndex, TCHAR *pszOut, int iSize)
{
	if(iIndex < 0 || iIndex >= m_iAmount || pszOut == NULL)
	{
		return FALSE;
	}

	int iCount = 0;
	PSTOREDATA pData = m_pFirstData;

	while(iCount != iIndex)
	{
		pData = pData->pNextData;
		iCount ++;
	}

	int iLen = _tcslen(pData->pszString);
	
	if(iSize < iLen + 1)
	{
		return FALSE;
	}

	_tcscpy(pszOut,pData->pszString);


	return TRUE;
}


//----------------------------------------------------------------------
//Description:
//	Find the string data and return the index in the storage.
//
//Parameters:
//	pcszFind: [in] The string to find
//
//Return Values:
//	-1 : failed
//	others: succeed.
//----------------------------------------------------------------------
int CStrStore::FindData(const TCHAR *pcszFind)
{
	int iIndexFind = 0;


	PSTOREDATA pData = m_pFirstData;

	while(iIndexFind < m_iAmount)
	{
		if(_tcscmp(pData->pszString,pcszFind) == 0)
		{
			break;
		}

		pData = pData->pNextData;
		iIndexFind ++;
	}

	if(iIndexFind >= m_iAmount)
	{
		//Failed in finding the string
		iIndexFind = -1;
	}

	return iIndexFind;
}


//----------------------------------------------------------------------
//Description:
//	Get the length of the string data base on the index. And the begin index is 0.
//
//Parameters:
//	iIndex : [in] The index in the stored data,and it's base on 0.
//
//Return Values:
//	-1 : failed
//	others: succeed.
//----------------------------------------------------------------------
int CStrStore::GetDataLength(int iIndex)
{
	if(iIndex < 0 || iIndex >= m_iAmount)
	{
		return -1;
	}

	int iCount = 0;
	PSTOREDATA pData = m_pFirstData;

	while(iCount != iIndex)
	{
		pData = pData->pNextData;
		iCount ++;
	}

	return  _tcslen(pData->pszString);

}