msdevset.cpp

一个通讯管理机的源代码。比较好用。推荐

#include "msdevset.h"

bool CMSDevSet::GetFirst()
{
	bool bRet = false;
	if ( GetFirstRecord() == XB_NO_ERROR )
	{
		m_wDevID = GetLongField(devno);
		m_wChannelID = GetLongField(channelno);
		m_strName = GetStringField(devname);
		m_byDllAddr = GetLongField(dlladdr);
		m_bIsOn = GetLogicalField(ison);
		m_wPasswd = (WORD)GetLongField(passwd);
		bRet = true;
	}
	return bRet;
}
	
bool CMSDevSet::GetNext()
{
	bool bRet = false;
	if (GetNextRecord() == XB_NO_ERROR )
	{
		m_wDevID = GetLongField(devno);
		m_wChannelID = GetLongField(channelno);
		m_strName = GetStringField(devname);
		m_byDllAddr = GetLongField(dlladdr);
		m_bIsOn = GetLogicalField(ison);
		m_wPasswd = (WORD)GetLongField(passwd);
		bRet = true;
	}
	return bRet;
}
	
bool CMSDevSet::GetFirst(WORD wChannelNo)
{
	bool bRet = false;
	if ( GetFirstRecord() == XB_NO_ERROR )
	{
		do {
			m_wDevID = GetLongField(devno);
			m_wChannelID = GetLongField(channelno);
			m_strName = GetStringField(devname);
			m_byDllAddr = GetLongField(dlladdr);
			m_bIsOn = GetLogicalField(ison);
			m_wPasswd = (WORD)GetLongField(passwd);
		} while ((m_wChannelID != wChannelNo) && (GetNextRecord() == XB_NO_ERROR ));
		if (m_wChannelID == wChannelNo)
			bRet = true;
	}
	return bRet;
}
	
bool CMSDevSet::GetNext(WORD wChannelNo)
{
	bool bRet = false;
	if (GetNextRecord() == XB_NO_ERROR )
	{
		do {
			m_wDevID = GetLongField(devno);
			m_wChannelID = GetLongField(channelno);
			m_strName = GetStringField(devname);
			m_byDllAddr = GetLongField(dlladdr);
			m_bIsOn = GetLogicalField(ison);
			m_wPasswd = (WORD)GetLongField(passwd);
		} while ((m_wChannelID != wChannelNo) && (GetNextRecord() == XB_NO_ERROR ));
		if (m_wChannelID == wChannelNo)
			bRet = true;
	}
	return bRet;
}
	
short CMSDevSet::Update()
{
	PutLongField(devno,m_wDevID);
	PutField(devname,m_strName.data());
	PutLongField(dlladdr,m_byDllAddr);
	PutLongField(channelno,m_wChannelID);
	PutField(ison,m_bIsOn?"T":"F");
	PutLongField(passwd,m_wPasswd);
	return PutRecord(GetCurRecNo());
}

short CMSDevSet::Add()
{
	BlankRecord();			/* blank out the record buffer */
	PutLongField(devno,m_wDevID);
	PutField(devname,m_strName.data());
	PutLongField(dlladdr,m_byDllAddr);
	PutLongField(channelno,m_wChannelID);
	PutField(ison,m_bIsOn?"T":"F");
	PutLongField(passwd,m_wPasswd);
	return AppendRecord();
}

void CMSDevSet::Delete(WORD	wDevNo)
{
	ExclusiveLock( F_SETLKW ); /* lock the files for our exclusive use */
	
	if (GetFirst())
	{
		do {
			if (m_wDevID == wDevNo)
			{
				DeleteRecord();
				if (RecordDeleted())
					PackDatabase(F_SETLKW);
				break;
			}
		} while(GetNext());
	}
	ExclusiveUnlock();     /* unlock the files */
}

void CMSDevSet::DeleteAll()
{
	if ( NoOfRecords())
	{
		if(GetFirstRecord() == XB_NO_ERROR )
		{
			while( 1 )
			{
				if( !RecordDeleted())
				{
					if(DeleteRecord() != XB_NO_ERROR )
						break;
				}
				if(GetNextRecord() != XB_NO_ERROR )
					break;
			}
		}
		PackDatabase(F_SETLKW);
	}
//	ExclusiveLock( F_SETLKW ); /* lock the files for our exclusive use */
///
//	while (GetFirst())
//	{
//		DeleteRecord();
//	}
//		if (RecordDeleted())
//			PackDatabase(F_SETLKW);
//	ExclusiveUnlock();     /* unlock the files */
}