www.pudn.com > manypeopleallchat.rar > Instruction.cpp

// Instruction.cpp: implementation of the CInstruction class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#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; 
}