www.gusucode.com > VC++简单多人聊天室源码-源码程序 > VC++简单多人聊天室源码-源码程序\code\Chatter\Instruction.cpp
// Instruction.cpp: implementation of the CInstruction class. // Download by http://www.NewXing.com ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "chatter.h" #include "Instruction.h" #include "buffer.h" #ifdef _DEBUG #undef THIS_FILE static char THIS_FILE[]=__FILE__; #define new DEBUG_NEW #endif ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// CInstruction::CInstruction() { } CInstruction::~CInstruction() { } //从缓冲区中得到一条合法指令, //指令以两个字母开头,并以'\0'结尾 BOOL CInstruction::HasInstrunction(CBuffer &buffer) { m_strInstruction.Empty(); CHAR byte[] = "\0"; //扫描是否有合法指令到达 int nPos = buffer.Scan(byte, 0); //没有合法指令,返回 if(nPos == 0) return FALSE; PCHAR pBuffer = new CHAR[nPos]; memset(pBuffer, 0, nPos); int nSize = buffer.Read(pBuffer, nPos); //开头的字母小于2,非法指令 if(nSize < 2) { delete pBuffer; return FALSE; } m_strInstruction = pBuffer; delete pBuffer; return TRUE; } //获得有效数据 LPCSTR CInstruction::GetValidMessage() { return m_strInstruction.Mid(2); } //是否是新用户加入(New User) BOOL CInstruction::IsNewUser() { return (m_strInstruction.Left(2).CompareNoCase("NU")==0); } //是否是欢迎消息(Welcome) BOOL CInstruction::IsWCMessage() { return (m_strInstruction.Left(2).CompareNoCase("WC")==0); } //是否是所有用户列表(All Users) BOOL CInstruction::IsAllUsers() { return (m_strInstruction.Left(2).CompareNoCase("AU")==0); } //是否是新信息(New Information) BOOL CInstruction::IsNewInformation() { return (m_strInstruction.Left(2).CompareNoCase("NI")==0); } //是否是用户退出(User Exit) BOOL CInstruction::IsUserExit() { return (m_strInstruction.Left(2).CompareNoCase("UE")==0); } //获得发送给服务器的登陆指令(LOGIN) LPCSTR CInstruction::GetLoginInstruction(LPCSTR strUser) { return CString("LG")+strUser; } //获得发送给服务器的"话" (User say) LPCSTR CInstruction::GetSayInstruction(LPCSTR strSay) { return CString("US")+strSay; }