C++ parseCommand函数代码示例

//Pipe function to allow piping between two programs.
void pipe(const std::string command, std::chrono::duration<double>& totalTime){
	char** argv1;
	char** argv2;

	//Getting two char** argv's from the one already made, 
	//splitting it by the '|' character/argument in argv.
	std::string command1 = "";
	std::string command2 = "";
	std::stringstream ss;
	ss.str(command);
	getline(ss, command1, '|');
	getline(ss, command2);
	parseCommand(command1, argv1);
	parseCommand(command2, argv2);
	
	//Constants setup
	const int PIPE_COUNT = 2;
	const int PIPE_READ_END = 0;
	const int PIPE_WRITE_END = 1;
	const int STDIN = 0;
	const int STDOUT = 1;
	
	//Pipe creation
	int pids[PIPE_COUNT];
	pipe(pids);
	
	//Duplicate stdout and stdin to use to connect the 
	//ends back together later
	int savedStdout = dup(STDOUT);
	int savedStdin = dup(STDIN);
	
	//First process: put the pipe's write end in place of stdout.
	pid_t pid1 = fork();
	if (pid1 == 0){
		dup2(pids[PIPE_WRITE_END], STDOUT);
		runAndTimeChildProcess(argv1[0], argv1, totalTime);
		exit(111);
	}
	//Second process: put the pipe's read end in place of stdin, 
	//and close the pipe's write end to tell 2nd process no more 
	//data is coming for it to read.
	pid_t pid2 = fork();
	if (pid2 == 0){
		dup2(pids[PIPE_READ_END], STDIN);
		close(pids[PIPE_WRITE_END]);
		runAndTimeChildProcess(argv2[0], argv2, totalTime);
		exit(111);
	}
	int status;
	waitpid(pid1, &status, 0);
	close(pids[PIPE_WRITE_END]);
	close(pids[PIPE_READ_END]);
	waitpid(pid2, &status, 0);
	
	dup2(savedStdout, STDOUT);
	dup2(savedStdin, STDIN);

}

int main(int argc, char*argv[]){

    string test = "PUT:fileName:DATA";
    int t = parseCommand(test);
    string data = listen(PORT);
    int command = parseCommand(data);
    if(command == PUT){
        string fileName = getFileName(data);
        string dataToWrite = getData(data);
        writeFile(fileName, dataToWrite);
    }
    return 0;
}

int connectionReceiveCommand(connection *con) {
	int socketFD = con->tArgs->socketFD;
	command *cmd = con->cmd;
	error *err = con->err;

	// if (cmd->args != NULL) {
	// 	free(cmd->args);
	// 	cmd->args = NULL;
	// }
	destroyCommandArgs(cmd);

	printf("\n>====== Waiting to receive command from client...\n");

	char buf[BUFSIZE];
	memset(buf, 0, BUFSIZE);

	int term;
	if (messageReceive(socketFD, buf, &(con->dataBytes), &(con->data), &term)) {
		if (term) {
			ERROR(err, E_EXIT);
		} else {
			ERROR(err, E_MSG);
		}

		return 1;
	}

	return parseCommand(buf, cmd, err);
}

void ClientThread::run()
{
    QTcpSocket tcpSocket;
    if (!tcpSocket.setSocketDescriptor(m_socketDescriptor)) {
        qWarning() << ":(((";
        emit error(tcpSocket.error());
        return;
    }

    m_running = true;

    QString command, response;

    // Send greetings
    tcpSocket.write("OK MPD 0.12.2\n");

    while (m_running && (tcpSocket.state() == QAbstractSocket::ConnectedState)) {
        m_running = tcpSocket.waitForReadyRead();   // Wait for command, 
                                                    // if none is received until timeout
                                                    // (default 30 seconds, stop running).

        command = QString(tcpSocket.readLine()).trimmed();
       
        qDebug() << command;

        tcpSocket.write(parseCommand(command).toLocal8Bit());
    }

    tcpSocket.disconnectFromHost();
}

void browsers::CellBrowser::OnWXOpenCell(wxCommandEvent& event)
{
   _activeStructure = top_structure = RBcellID;
   wxString cmd; 
   cmd << wxT("opencell(\"") << GetItemText(RBcellID) <<wxT("\");");
   parseCommand(cmd);
}

CMD *parseCommand(token **lstHead)
{
	CMD *cmd = parseAndOr(lstHead);
	if(cmd->type == ERROR)
	{
		//propagate an error
		return cmd;
	}

	//check to make sure that end of linked list not reached
	if(cmd && *lstHead && ((*lstHead)->type == SEP_END || 
							(*lstHead)->type == SEP_BG))
	{
		CMD *andorCMD = cmd;
		cmd = mallocCMD();
		cmd->type = (*lstHead)->type;
		cmd->left = andorCMD;
		*lstHead = (*lstHead)->next;
		if(*lstHead)
		{
			cmd->right = parseCommand(lstHead);
			if(cmd->right->type == ERROR)
			{
				//propagate along an error
				return cmd->right;
			}
		}
	}
	return cmd;
}

static void handleCommand(char *command) {
	commandinfo *cinfo = parseCommand(command, MSG_OUTGOING);

	switch (cinfo->command) {
		case C_QUIT:
			cleanup(0);
			break;

		case C_SYNACK:
			sendMessage(sock, "ACK");
			break;

		case C_GET:
			if (cinfo->param == P_POSTS) {
				sendMessage(sock, command);
			} else if (cinfo->param == P_POST) {
				sendMessage(sock, command);
			}
			break;

		default:
			sendMessage(sock, command);
			break;
	}

	freeCommandInfo(cinfo);
}

//Ingresa un string que puede ser tanto un comando, una variable o un literal
//por lo que se procesa y devuelve resuelto, si corresponde, en formato de lista
std::vector<std::string> InterpreteLISP::procesarComandoLISP(
		const std::string &input) const {
	std::vector<std::string> comando;
	std::string palabra;
	if (input.empty()) return comando;
	if (input.at(0) =='(') {
		//el string ingresado es comando LISP
		comando = parseCommand(input);

		std::string nombreFuncion;
		nombreFuncion = comando.front();
		comando.erase(comando.begin());
		FuncionLISP* funcion = (*funcionesAmbiente)[nombreFuncion];
		comando = funcion->resolver(comando, *this);
	} else {
		//el string ingresado es un simbolo
		if ((*variablesAmbiente)[input] != NULL) {
			//el simbolo es una variable definida anteriormente
			return *((*variablesAmbiente)[input])->getVariable();
		} else {
			//el simbolo ingresado es un literal
			comando.push_back(input);
		}
	}
	return comando;
}

void printNetDevSentBytes(const char *cmd)
{
	int i;
	char **retval;
	
	retval = parseCommand(cmd);
	
	if (retval == NULL)
		return;

	for (i = 0; i < NetDevCnt; i++) {
		if (!strcmp(NetDevs[i].name, retval[0])) {
			if (!strncmp(retval[1], "data", 4))
				fprintf(CurrentClient, "%lu", (u_long)((NetDevs[i].sentBytes - NetDevsOld[i].sentBytes) / (1024 * elapsed)));
			if (!strncmp(retval[1], "packets", 7))
				fprintf(CurrentClient, "%lu", (u_long)((NetDevs[i].sentPacks - NetDevsOld[i].sentPacks) / elapsed));
			if (!strncmp(retval[1], "errors", 6))
				fprintf(CurrentClient, "%lu", (u_long)((NetDevs[i].sentErrs - NetDevsOld[i].sentErrs) / elapsed));
			if (!strncmp(retval[1], "multicast", 9))
				fprintf(CurrentClient, "%lu", (u_long)((NetDevs[i].sentMulticast - NetDevsOld[i].sentMulticast) / elapsed));
			if (!strncmp(retval[1], "collisions", 10))
				fprintf(CurrentClient, "%lu", (u_long)((NetDevs[i].sentColls - NetDevsOld[i].sentColls) / elapsed));
		}
	}
	free(retval[0]);
	free(retval[1]);
	free(retval);

	fprintf(CurrentClient, "\n");
}

void Client::listen() {
	string line;
	string response = "";
	string request = "";

	cout << "% ";

	// loop to handle user interface
	while (getline(cin,line)) {
		request = parseCommand(line);
		if(request.size() == 0){
			cout << "% ";
			continue;
		}
		bool success = sendRequest(request);
		// break if an error occurred
		if (not success)
			break;
		// get a response
		success = getResponse();
		// break if an error occurred
		if (not success)
			break;
		cout << "% ";

	}
	close(server_);
}

void parseByte (int newByte)  // parse an incoming commandbyte from serial interface, perform command if valid
{
   static uint8_t cmdlen=0;
  
   if (CimParserActive)
          parse_CIM_protocol(newByte);   // handle AsTeRICS CIM protocol messages !
   else
   {
      switch (readstate) {
        case 0: 
                if ((newByte=='A') || (newByte=='a')) readstate++;
                if (newByte=='@') { readstate++; CimParserActive=1; }  // switch to AsTeRICS CIM protocol parser
             break;
        case 1: 
                if ((newByte=='T') || (newByte=='t')) readstate++; else readstate=0;
            break;
        case 2: 
                if ((newByte=='\r') || (newByte=='\n'))  // AT reply: "OK" 
                {  Serial.println("OK");  readstate=0; }
                else if (newByte==' ') { cmdlen=0; readstate++; } 
                else goto err;
            break;
        case 3: 
                if ((newByte=='\r') || (newByte=='\n') || (cmdlen>=MAX_CMDLEN-1))
                {  tmpstring[cmdlen]=0;  parseCommand(tmpstring); 
                  readstate=0; }
                else tmpstring[cmdlen++]=newByte;
            break;   
        default: err: Serial.println("?");readstate=0;
      }
   }
}

// Checked: 2009-12-27 (RLVa-1.1.0k) | Modified: RLVa-1.1.0k
RlvCommand::RlvCommand(const LLUUID& idObj, const std::string& strCommand)
	: m_idObj(idObj), m_eBehaviour(RLV_BHVR_UNKNOWN), m_fStrict(false), m_eParamType(RLV_TYPE_UNKNOWN)
{
	if ((m_fValid = parseCommand(strCommand, m_strBehaviour, m_strOption, m_strParam)))
	{
		S32 nTemp = 0;
		if ( ("n" == m_strParam) || ("add" == m_strParam) )
			m_eParamType = RLV_TYPE_ADD;
		else if ( ("y" == m_strParam) || ("rem" == m_strParam) )
			m_eParamType = RLV_TYPE_REMOVE;
		else if (m_strBehaviour == "clear")						// clear is the odd one out so just make it its own type
			m_eParamType = RLV_TYPE_CLEAR;
		else if ("force" == m_strParam)
			m_eParamType = RLV_TYPE_FORCE;
		else if (LLStringUtil::convertToS32(m_strParam, nTemp))	// Assume it's a reply command if we can convert <param> to an S32
			m_eParamType = RLV_TYPE_REPLY;
		else
		{
			m_eParamType = RLV_TYPE_UNKNOWN;
			m_fValid = false;
		}
	}

	if (!m_fValid)
	{
		m_strBehaviour = m_strOption = m_strParam = "";
		return;
	}

	// HACK: all those @addoutfit* synonyms are rather tedious (and error-prone) to deal with so replace them their @attach* equivalent
	if ( (RLV_TYPE_FORCE == m_eParamType) && (0 == m_strBehaviour.find("addoutfit")) )
		m_strBehaviour.replace(0, 9, "attach");
	m_eBehaviour = getBehaviourFromString(m_strBehaviour, &m_fStrict);
}

void Client::readClient() {
    //qDebug()<<"Client::readClient";
    QTcpSocket* socket = (QTcpSocket*)sender();
    QByteArray buffer=socket->readLine();
    QString response=parseCommand(QString(buffer));
    socket->write(response.toLatin1());
}

int Programmanalisator::processCommand(QString* Kadr, int LNum)
{
    int Typ=parseCommand(Kadr, LNum); // анализируем кадр

    if (Typ<0) {

        return -1;
    }

    switch (Typ) { // выдача сигнала по результатам команды
    case BULK_FORM1 : break;
    case BULK_FORM2 : emit Kommand(BULK_FORM2, Q1, Q2, Q3, Q4, Q5, Q6, 0);
                      break;
    case FRES_X     : emit Kommand(FRES_X,Q1,0,0,0,0,0,0);
                      break;
    case FRES_Y     : emit Kommand(FRES_Y,Q1,0,0,0,0,0,0);
                      break;
    case FRES_Z     : emit Kommand(FRES_Z,Q1,0,0,0,0,0,0);
                      break;
    case FRES_IX    : emit Kommand(FRES_IX,Q1,0,0,0,0,0,0);
                      break;
    case FRES_IY    : emit Kommand(FRES_IY,Q1,0,0,0,0,0,0);
                      break;
    case FRES_IZ    : emit Kommand(FRES_IZ,Q1,0,0,0,0,0,0);
                      break;
    case TOOL_CALL  : emit Kommand(TOOL_CALL,0,0,0,0,0,0,I1);
                      break;
    case LBL_CALL   : return I1;
                      break;
    default : break;

    }
    return 0;
}

void prvCommsTask(void *pvParameters)
{
    pvParameters = pvParameters;

    static uint8_t line[80];
    static uint8_t characterPosition = 0;

    initGlobals();

/* Timer to cause outgoing communications to cease if nothing received for 10
seconds */
    lapseCommsTimer = xTimerCreate("Lapse Comms",10000,pdFALSE,0,lapseCommsCallback);

    while(1)
    {
/* Build a command line string before actioning. The task will block
indefinitely waiting for input. */
        char character;
        xQueueReceive(commsReceiveQueue,&character,portMAX_DELAY);
        if ((character == 0x0D) || (character == 0x0A) || (characterPosition > 78))
        {
            if (lapseCommsTimer != NULL) xTimerReset(lapseCommsTimer,0);
            line[characterPosition] = 0;
            characterPosition = 0;
            parseCommand(line);
        }
        else line[characterPosition++] = character;
    }
}