From a9ba68d33abcadfbed7aa64aecd5e5b221246eff Mon Sep 17 00:00:00 2001
From: Franklin Wei <frankhwei536@gmail.com>
Date: Sun, 6 Apr 2014 21:56:55 +0100
Subject: Added command parser

---
 parse.cpp | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 parse.h   |   3 ++
 2 files changed, 115 insertions(+)
 create mode 100644 parse.cpp
 create mode 100644 parse.h

diff --git a/parse.cpp b/parse.cpp
new file mode 100644
index 0000000..a0f0300
--- /dev/null
+++ b/parse.cpp
@@ -0,0 +1,112 @@
+#include <iostream>
+#include <cstdlib>
+#include <string>
+#include <sstream>
+#include <vector>
+#include <led.h>
+#include <morse.h>
+#include <unistd.h>
+void pish_parse(const string& str)
+{
+  stringstream ss(str);
+  string cmd;
+  ss>>cmd;
+  vector<string> args;
+  while(ss)
+    {
+      string arg;
+      ss >> arg;
+      args.push_back(arg);
+    }
+  string argstr;
+  for(int i=0;i<args.size();++i)
+    {
+      argstr+=args[i]+' ';
+    }
+  if(cmd.length()==0)
+    return; // exit early
+  if(cmd=="exit" or cmd=="quit")
+    {
+      dash();
+      exit(0);
+    }
+  else if(cmd=="morse")
+    {
+      if(argstr!="")
+	{
+	  dash();
+	  usleep(250000);
+	  transmit(argstr);
+	  usleep(250000);
+	  dash();
+	}
+      else
+	{
+	  cerr << "morse requires an argument" << endl;
+	  dot();
+	  usleep(250000);
+	  dot();
+	}
+    }
+  else if(cmd=="exec")
+    {
+      if(argstr=="")
+	{
+	  dot();
+	  usleep(250000);
+	  dot();
+	}
+      else
+	{
+	  dash();
+	  usleep(250000);
+	  int ret=system(argstr.c_str());
+	  if(ret!=EXIT_SUCCESS)
+	    {
+	      cerr << "Command exited with return value " << ret << endl;
+	      dot();
+	      usleep(250000);
+	      dot();
+	    }
+	  else
+	    {
+	      cerr << "Command exited normally." << endl;
+	      dash();
+	    }
+	}
+    }
+  else if(cmd=="cd")
+    {
+      if(argstr!="")
+	{
+	  dash();
+	  usleep(250000);
+	  chdir(argstr.c_str());
+	  dash();
+	}
+      else
+	{
+	  cerr << "Need an argument" << endl;
+	  dot();
+	  usleep(250000);
+	  dot();
+	}
+    }
+  else if(cmd=="pwd")
+    {
+      dash();
+      usleep(250000);
+      char* pwd=getcwd(0,0);
+      transmit(string(pwd));
+      free(pwd);
+      usleep(25000);
+      dash();
+    }
+  else
+    {
+      cerr << "Invalid command." << endl;
+      dot();
+      usleep(250000);
+      dot();
+    }
+}
diff --git a/parse.h b/parse.h
new file mode 100644
index 0000000..7e21fd4
--- /dev/null
+++ b/parse.h
@@ -0,0 +1,3 @@
+#include <string>
+using namespace std;
+void pish_parse(const string& str);
-- 
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