搭建PVB架构，实现前端的基础布局、菜单、表格、图示等功能

libs/pvb/include/rllib/rlcommandlineinterface.h

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+/***************************************************************************
+                          rlcommandlineinterface.h  -  description
+                             -------------------
+    begin                : Sat Mar 27 2010
+    copyright            : (C) 2010 by R. Lehrig
+    email                : lehrig@t-online.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as        *
+ *   published by the Free Software Foundation                             *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef _RL_COMMANDLINE_INTERFACE_H_
+#define _RL_COMMANDLINE_INTERFACE_H_
+
+#include "rldefine.h"
+#include "rlsocket.h"
+#include "rlserial.h"
+#include "rlspawn.h"
+
+/*! <pre>
+Commandline interface that allows applications to communicate over pipe || socket || serial line || stdio .
+
+The parameters of start() are as follows:
+start("stdio");                    // use stdin and stdout
+start("pipe","command");           // run "command" and connect it's stdio with us (runs on unix only)
+start("host:5050");                // connect to "host" on port 5050 and communicate with the server (tip: define a server with xinted on "host" port 5050)
+start("localhost:5050","command"); // run "command" and then try to connect to "localhost" port 5050 for communication with "command"
+start("server.localhost:5050");    // act as a server on "localhost" port 5050 (can serve only 1 client. if you want to serve more clients use rlSocket)
+start(tty);                        // use serial interface for communication
+
+Return values:
+start()      returns -1 on error
+readLine()   returns the read string or NULL
+readBlock()  returns the number of read bytes or -1 on error
+printf()     returns the number of written characters or -1 on error
+writeBlock() returns the number of written bytes or -1 on error
+</pre> */
+class rlCommandlineInterface
+{
+public:
+  rlCommandlineInterface();
+  virtual    ~rlCommandlineInterface();
+  int         start(const char *how, const char *command=NULL);
+  int         start(rlSerial *tty);
+  const char *readLine(int timeout=0);
+  int         readBlock(void *buf, int len, int timeout=0);
+  int         printf(const char *format, ...);
+  int         writeBlock(void *buf, int len);
+private:
+  char        line[rl_PRINTF_LENGTH];
+  rlSocket    *sock;
+  rlSpawn     *spawn;
+  rlSerial    *tty;
+};
+#endif
+