yxset.cpp

一个通讯管理机的源代码。比较好用。推荐

#include "yxset.h"

bool CYXSet::GetFirst()
{
	bool bRet = false;
	if ( GetFirstRecord() == XB_NO_ERROR )
	{
		m_wLocalNo = GetLongField(localno);
		m_wDevNo = GetLongField(devno);
		m_bNOT = GetLogicalField(bnot);
		m_strName = GetStringField(name);
		bRet = true;
	}
	return bRet;
}

bool CYXSet::GetNext()
{
	bool bRet = false;
	if (GetNextRecord() == XB_NO_ERROR )
	{
		m_wLocalNo = GetLongField(localno);
		m_wDevNo = GetLongField(devno);
		m_bNOT = GetLogicalField(bnot);
		m_strName = GetStringField(name);
		bRet = true;
	}
	return bRet;
}
	
short CYXSet::Update()
{
	PutLongField(localno,m_wLocalNo);
	PutLongField(devno,m_wDevNo);
	PutField(bnot,m_bNOT?"T":"F");
	PutField(name,m_strName.data());
	return PutRecord(GetCurRecNo());
}

short CYXSet::Add()
{
	BlankRecord();			/* blank out the record buffer */
	PutLongField(localno,m_wLocalNo);
	PutLongField(devno,m_wDevNo);
	PutField(bnot,m_bNOT?"T":"F");
	PutField(name,m_strName.data());
	return AppendRecord();
}

void CYXSet::Delete(BYTE	wDevNo,WORD	wLocalNo)
{
	ExclusiveLock( F_SETLKW ); /* lock the files for our exclusive use */
	if (GetFirst())
	{
		do {
			if ((m_wDevNo == wDevNo) && (m_wLocalNo == wLocalNo))
			{
				DeleteRecord();
				if (RecordDeleted())
					PackDatabase(F_SETLKW);
				break;
			}
		} while(GetNext());
	}
	ExclusiveUnlock();     /* unlock the files */
}