自学教程：C++ switchState函数代码示例

int main(int argc, char **argv){    pthread_t thread_lan;    void *retval; // pthread线程的返回值，本程序中没有实际用处#ifdef ENABLE_NLS	textdomain(GETTEXT_PACKAGE);	setlocale(LC_ALL, "");#endif	atexit(exit_handle);	initConfig(argc, argv);	signal(SIGALRM, sig_handle);	/* 定时器 */	signal(SIGHUP, sig_handle);	 /* 注销时 */	signal(SIGINT, sig_handle);	 /* Ctrl+C */	signal(SIGQUIT, sig_handle);	/* Ctrl+/ */	signal(SIGTSTP, sig_handle);	/* Ctrl+Z */	signal(SIGTERM, sig_handle);	/* 被结束时 */	if (dhcpMode == 3)	  /* 认证前DHCP */		switchState(ID_DHCP);	else		if (proxyMode == 0)			switchState(ID_START);	/* 不使用代理时直接开始认证 */		else			switchState(ID_WAITCLIENT); /* 开启代理时等待客户端认证 */	if (proxyMode == 0) {		wan_thread(); // 非代理模式，直接执行，不使用多线程	} else { // 代理模式，为LAN多开一个线程		pthread_create(&thread_lan, NULL, lan_thread, 0);		wan_thread();		pthread_join(thread_lan, &retval);	}	exit(EXIT_FAILURE);}

int main(int argc, char **argv){	atexit(exit_handle);	if(initConfig(argc, argv))		exit(EXIT_FAILURE);	signal(SIGALRM, sig_handle);	/* 定时器 */	signal(SIGHUP, sig_handle);	 /* 注销时 */	signal(SIGINT, sig_handle);	 /* Ctrl+C */	signal(SIGQUIT, sig_handle);	/* Ctrl+/ */	signal(SIGTSTP, sig_handle);	/* Ctrl+Z */	signal(SIGTERM, sig_handle);	/* 被结束时 */	signal(SIGKILL, sig_handle);	if (dhcpMode == 3)	  /* 认证前DHCP */		switchState(ID_DHCP);	else		switchState(ID_START);	/* 开始认证 */	if (-1 == pcap_loop(hPcap, -1, pcap_handle, NULL)) { /* 开始捕获数据包 */		printf("!! 捕获数据包失败，请检查网络连接！/n");#ifndef NO_NOTIFY		if (showNotify)			show_notify("MentoHUST - 错误提示", "捕获数据包失败，请检查网络连接！");#endif	}	exit(EXIT_FAILURE);}

int switchState(int type){	if (state == type) /* 跟上次是同一状态？ */		sendCount++;	else	{		state = type;		sendCount = 0;	}	if (sendCount>=MAX_SEND_COUNT && type!=ID_ECHO)  /* 超时太多次？ */	{		switch (type)		{		case ID_START:			printf(_(">> 找不到服务器，重启认证!/n"));			break;		case ID_IDENTITY:			printf(_(">> 发送用户名超时，重启认证!/n"));			break;		case ID_CHALLENGE:			printf(_(">> 发送密码超时，重启认证!/n"));			break;		case ID_WAITECHO:			printf(_(">> 等候响应包超时，自行响应!/n"));			return switchState(ID_ECHO);		}		return restart();	}	switch (type)	{	case ID_DHCP:		return renewIP();	case ID_START:		return sendStartPacket();	case ID_IDENTITY:		return sendIdentityPacket();	case ID_CHALLENGE:		return sendChallengePacket();	case ID_WAITECHO:	/* 塞尔的就不ping了，不好计时 */		return waitEchoPacket();	case ID_ECHO:		if (pingHost && sendCount*echoInterval > 60) {	/* 1分钟左右 */			if (isOnline() == -1) {				printf(_(">> 认证掉线，开始重连!/n"));				return switchState(ID_START);			}			sendCount = 1;		}#ifndef NO_ARP		if (gateMAC[0] != 0xFE)			sendArpPacket();#endif		return sendEchoPacket();	case ID_DISCONNECT:		return sendLogoffPacket();	}	return 0;}

void OptionState::step_impl(){	const int MAX_BOT_DELAY = 25;		// 25 frames = 0.33s (gamespeed: normal)	IMGUI& imgui = IMGUI::getSingleton();	imgui.doCursor();	imgui.doImage(GEN_ID, Vector2(400.0, 300.0), "background");	imgui.doOverlay(GEN_ID, Vector2(0.0, 0.0), Vector2(800.0, 600.0));	imgui.doEditbox(GEN_ID, Vector2(5.0, 10.0), 15, mPlayerName[LEFT_PLAYER], mPlayerNamePosition[LEFT_PLAYER]);	imgui.doEditbox(GEN_ID, Vector2(425.0, 10.0), 15, mPlayerName[RIGHT_PLAYER], mPlayerNamePosition[RIGHT_PLAYER]);	imgui.doSelectbox(GEN_ID, Vector2(5.0, 50.0), Vector2(375.0, 300.0), mScriptNames, mPlayerOptions[LEFT_PLAYER]);	imgui.doSelectbox(GEN_ID, Vector2(425.0, 50.0), Vector2(795.0, 300.0), mScriptNames, mPlayerOptions[RIGHT_PLAYER]);	imgui.doText(GEN_ID, Vector2(270.0, 310.0), TextManager::OP_DIFFICULTY );	float f = 1.f - (float)mBotStrength[0] / MAX_BOT_DELAY;	imgui.doScrollbar(GEN_ID, Vector2(15.0, 350.0), f);	mBotStrength[0] = static_cast<unsigned int> ((1.f-f) * MAX_BOT_DELAY + 0.5f);	imgui.doText(GEN_ID, Vector2(235.0, 350.0), f > 0.66 ? TextManager::OP_STRONG :											 	(f > 0.33 ? TextManager::OP_MEDIUM:												TextManager::OP_WEAK));	f = 1.f - (float)mBotStrength[1] / MAX_BOT_DELAY;	imgui.doScrollbar(GEN_ID, Vector2(440.0, 350.0), f);	mBotStrength[1] = static_cast<unsigned int> ((1.f - f) * MAX_BOT_DELAY + 0.5f);	imgui.doText(GEN_ID, Vector2(660.0, 350.0), f > 0.66 ? TextManager::OP_STRONG :											 	(f > 0.33 ? TextManager::OP_MEDIUM:												TextManager::OP_WEAK));	if (imgui.doButton(GEN_ID, Vector2(40.0, 390.0), TextManager::OP_INPUT_OP))	{		save();		switchState(new InputOptionsState());	}	if (imgui.doButton(GEN_ID, Vector2(40.0, 430.0), TextManager::OP_GFX_OP))	{		save();		switchState(new GraphicOptionsState());	}	if (imgui.doButton(GEN_ID, Vector2(40.0, 470.0), TextManager::OP_MISC))	{		save();		switchState(new MiscOptionsState());	}	if (imgui.doButton(GEN_ID, Vector2(224.0, 530.0), TextManager::LBL_OK))	{		save();		switchState(new MainMenuState());	}	if (imgui.doButton(GEN_ID, Vector2(424.0, 530.0), TextManager::LBL_CANCEL))	{		switchState(new MainMenuState());	}}

static int renewIP(){	setTimer(0);	/* 取消定时器 */	printf(_(">> 正在获取IP.../n"));	system(dhcpScript);	printf(_(">> 操作结束。/n"));	dhcpMode += 3; /* 标记为已获取，123变为456，5不需再认证*/	if (fillHeader() == -1)		exit(EXIT_FAILURE);	if (dhcpMode == 5)		return switchState(ID_ECHO);	return switchState(ID_START);}

int main(int argc, char *argv[]){    QCoreApplication::setOrganizationName("SRFGames");    QCoreApplication::setOrganizationDomain("sol-online.org"),    QCoreApplication::setApplicationName("ShareYourClipboard");#ifdef Q_OS_MAC    QDir dir(argv[0]);    dir.cdUp();    QString currentDir = dir.absolutePath();    dir.cdUp();    dir.cd("PlugIns");    QCoreApplication::setLibraryPaths(QStringList(dir.absolutePath()));#endif    QApplication a(argc, argv);    QApplication::setQuitOnLastWindowClosed(false);#ifdef Q_OS_MAC    QDir::setCurrent(currentDir);#endif    qDebug() << "init manager/n";    cClipboardManager manager(a.clipboard());    qDebug() << "init tray icon/n";    cTrayIcon trIcon(&manager);    QObject::connect(&trIcon, SIGNAL(switchState()), &manager, SLOT(switchState()));    QObject::connect(&trIcon, SIGNAL(pasteFiles()), &manager, SLOT(pasteFiles()));    QObject::connect(&manager, SIGNAL(onStateChanged(cClipboardManager::eClipboardState)), &trIcon, SLOT(setState(cClipboardManager::eClipboardState)));    qDebug() << "init settings window/n";    SettingsWindow settingsWindow(&manager);    QObject::connect(&trIcon, SIGNAL(showSettings()), &settingsWindow, SLOT(showNormal()));    QObject::connect(&settingsWindow, SIGNAL(preferencesChange()), &manager, SLOT(onPreferencesChanged()));    qDebug() << "init copy dialog/n";    CopyProgressDialog copydialog;    QObject::connect(&manager, SIGNAL(onStartCopyProcess(QString)), &copydialog, SLOT(start(QString)));    QObject::connect(&manager, SIGNAL(onStopCopyProcess()), &copydialog, SLOT(stop()));    QObject::connect(&manager, SIGNAL(showMessage(QString)), &copydialog, SLOT(showMessage(QString)));    QObject::connect(&manager, SIGNAL(onSetProgressMain(QString,int,int)), &copydialog, SLOT(setProgressMain(QString,int,int)));    QObject::connect(&manager, SIGNAL(onSetProgressSecond(QString,int,int)), &copydialog, SLOT(setProgressSecond(QString,int,int)));    QObject::connect(&copydialog, SIGNAL(cancel()), &manager, SLOT(cancelDownloading()));    qDebug() << "start app loop/n";    int result = a.exec();    qDebug() << "application close/n";    return result;}

void telemetryInterrupt10ms(){  if (jetiReady) {    jetiKeys = JETI_KEY_NOCHANGE;    if (switchState((EnumKeys)(KEY_UP))) jetiKeys &= JETI_KEY_UP;    if (switchState((EnumKeys)(KEY_DOWN))) jetiKeys &= JETI_KEY_DOWN;    if (switchState((EnumKeys)(KEY_LEFT))) jetiKeys &= JETI_KEY_LEFT;    if (switchState((EnumKeys)(KEY_RIGHT))) jetiKeys &= JETI_KEY_RIGHT;    jetiReady = 0;    // invalidate buffer    JETI_EnableTXD();  }}

void cTrayIcon::onTray(QSystemTrayIcon::ActivationReason reason){#ifndef Q_OS_MAC    if (reason==QSystemTrayIcon::Trigger)        emit switchState();#endif}

 void getHit() {     currState->hit();     auto x = dynamic_cast<InvincMarioState*>(currState);     if (x) { return; }     //if not invincible, convert to short mario     switchState(new ShortMarioState()); }

 void getStarMan() {     //better way would be to use a transition table     auto x = dynamic_cast<InvincMarioState*>(currState);     if (!x) {         switchState(new InvincMarioState());     } }

static int sendEchoPacket(){	if (startMode%3 == 2)	/* 赛尔 */	{		*(u_int16_t *)(sendPacket+0x0E) = htons(0x0106);		*(u_int16_t *)(sendPacket+0x10) = 0;		memset(sendPacket+0x12, 0xa5, 42);		switchState(ID_WAITECHO);	/* 继续等待 */		return pcap_sendpacket(hPcap, sendPacket, 60);	}	if (sendCount == 0)	{		u_char echo[] =		{			0x00,0x1E,0xFF,0xFF,0x37,0x77,0x7F,0x9F,0xFF,0xFF,0xD9,0x13,0xFF,0xFF,0x37,0x77,			0x7F,0x9F,0xFF,0xFF,0xF7,0x2B,0xFF,0xFF,0x37,0x77,0x7F,0x3F,0xFF		};		printf(_(">> 发送心跳包以保持在线.../n"));		fillEtherAddr(0x888E01BF);		memcpy(sendPacket+0x10, echo, sizeof(echo));		setTimer(echoInterval);	}	fillEchoPacket(sendPacket);	return pcap_sendpacket(hPcap, sendPacket, 0x2D);}

ImapSession::~ImapSession() {    switchState(ImapSessionState::EXIT);    if (service_)        delete service_;    if (socket_)        delete socket_;}

 void Dodge::onAnimationEnd() {     State::onAnimationEnd();     Movement newMvt(_mvt);     newMvt.setAction(Movement::Shield);     switchState(newMvt & ~Movement::Up & ~Movement::Down); }

 void message(const NetMessage* msg) {     T new_state = current->message(msg);     if ( new_state != state )     {         switchState(new_state);     } }

void sstvRx::eraseImage(){  switchState(RESTART);  while(SSTVState!=HUNTING)    {      QApplication::processEvents();    }}

void QgsAddRemoveMultiFrameCommand::undo(){  if ( checkFirstRun() )  {    return;  }  switchState();}

 void process() {     T new_state = current->process();     if ( new_state != state )     {         switchState(new_state);     } }

 void Crouch::onRight(const Event & e) {     State::onRight(e);     if (e.edge == Event::RisingEdge)     {         switchState(Movement::Crouch | Movement::Right);         setNextStateAnimationFrameToCurrentFrame();     } }

ImapSession::ImapSession(service::Service *service, net::SocketSingle *socket)        : state_(ImapSessionState::START), service_(service), socket_(socket),          onExitCallback_(nullptr) {    if (service_ == nullptr)        throw invalid_argument("ImapSession::ImapSession: service is nullptr");    if (socket_ == nullptr)        throw invalid_argument("ImapSession::ImapSession: socket is nullptr");    switchState(ImapSessionState::CONNECTED);}

int main(){	MemController<CarState> ctrl = MemController<CarState>();	CarState state;	//initial state:	state = ctrl.getLastElement();	memset(&state,0,sizeof(state));	ctrl.pushElement(state);	while(1)	{		for(int i=0;i<5000;i++){;}		int nios;		// get the lastest car state from the shared memory		state = ctrl.getLastElement(true);		// print some diagnostics information		int speed = state.motorEcus[0].iCurrentSpeed + state.motorEcus[1].iCurrentSpeed + state.motorEcus[2].iCurrentSpeed + state.motorEcus[3].iCurrentSpeed;		LOG_DEBUG("/rSpeed: %+5d mm/s, OpMode: %#x ", speed, state.currMode);		//LOG_DEBUG("yippee!");		// perform state switch if requested.		if(state.reqMode != state.currMode)		{			switchState(&state);		}		state.counterCarControl=state.counterComm;		setMotorSpeeds(&state);		if(state.currMode==OPMODE_MANUDRIVE){			state.ip1=state.reqip1;			state.ip2=state.reqip2;			state.ip3=state.reqip3;			state.ip4=state.reqip4;		}		else{			state.ip1=VCIPPart1;			state.ip2=VCIPPart2;			state.ip3=VCIPPart3;			state.ip4=VCIPPart4;		}		ctrl.pushElement(state);		// TODO: write a delay function w/ timer. Otherwise we might run into problems blocking the mutex from all the shared memory reads...		//delay(10);		for (int i = 0; i < 10000; i++) {;}	}	return -1;}

 void Run::onLeft(const Event & e) {     State::onLeft(e);     if (e.edge == Event::RisingEdge)     {         if (_mvt.flag() & Movement::Right)         {             switchState(Movement::Walk | Movement::Left);         }         else if (_mvt.flag() & Movement::Left)         {             switchState(Movement::Run | Movement::Left);         }     }     else if (e.edge == Event::FallingEdge)     {         switchState(Movement::Idle | Movement::Left);     } }

void KscreenEffect::prePaintScreen(ScreenPrePaintData &data, int time){    if (m_state == StateFadingIn || m_state == StateFadingOut) {        m_timeLine.setCurrentTime(m_timeLine.currentTime() + time);        if (m_timeLine.currentValue() >= 1.0) {            switchState();        }    }    effects->prePaintScreen(data, time);}

void QgsAddRemoveItemCommand::redo(){  QUndoCommand::redo(); // call redo() on all children  if ( mFirstRun )  {    mFirstRun = false;    return;  }  switchState();}

void QgsAddRemoveItemCommand::undo(){  QUndoCommand::undo(); // call undo() on all children, in reverse order  if ( mFirstRun )  {    mFirstRun = false;    return;  }  switchState();}