// 返回值:
// 0, 正常
// 如果是网络出错,则抛出 CSocketException 异常
int CTcpSocket::SendEx(const char* szBuf, int nBufLen, int nFlag)
{
int nCode = 0;
int nSended = 0;
const char* pszBuf = szBuf;

if (m_hSocket<=0)
commlogInt(loglevel5,"异常：m_hSocket=",m_hSocket);

while (true)
{
nSended = send(m_hSocket, pszBuf, nBufLen, nFlag);
if (nSended < 0) // 网络错误
{
nCode = CSocketException::GetOsCode();
throw CSocketException(nCode, CSocketException::GetOsMsg(nCode).c_str());
}
else
{
// 发送完毕则终止循环
if (nSended == nBufLen)
break;

nBufLen -= nSended;
pszBuf += nSended;
}
}

return 0;
}