From 7a544489aef4f4071efed1d6a6f5e01d830b74ae Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Wed, 6 Jul 2011 22:47:47 -0400
Subject: [PATCH] Command Line

- Added a method for extracting unstructured text from the command line.
---
 src/Arguments.cpp | 56 +++++++++++++++++++++++++++++++++++++++++++++++
 src/Arguments.h   |  1 +
 2 files changed, 57 insertions(+)

diff --git a/src/Arguments.cpp b/src/Arguments.cpp
index 5494e1d0b..aa020cc33 100644
--- a/src/Arguments.cpp
+++ b/src/Arguments.cpp
@@ -1502,6 +1502,62 @@ Arguments Arguments::extract_modifications ()
   return modifications;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+Arguments Arguments::extract_simple_words ()
+{
+  Arguments filter;
+
+  std::vector <Triple>::iterator arg;
+  for (arg = this->begin (); arg != this->end (); ++arg)
+  {
+    // Excluded.
+    if (arg->_third == "program"  ||
+        arg->_third == "command"  ||
+        arg->_third == "rc"       ||
+        arg->_third == "override" ||
+        arg->_third == "attr"     ||
+        arg->_third == "attmod")
+    {
+      ;
+    }
+
+    // Included.
+    else if (arg->_third == "tag"       ||
+             arg->_third == "pattern"   ||
+             arg->_third == "seq"       ||
+             arg->_third == "op"        ||
+             arg->_third == "exp"       ||
+             arg->_third == "word")
+    {
+      // "limit" is special - it is recognized but not included in filters.
+      if (arg->_first.find ("limit:") == std::string::npos)
+        filter.push_back (*arg);
+    }
+
+    // Error.
+    else
+    {
+      if (arg->_third == "tag")
+        throw std::string ("A tag '") + arg->_first + "' is not allowed "
+          "with this command.";
+
+      else if (arg->_third == "pattern")
+        throw std::string ("A pattern '") + arg->_first + "' is not allowed "
+          "with this command.";
+
+      else if (arg->_third == "substitution")
+        throw std::string ("A substitution '") + arg->_first + "' is not allowed "
+          "with this command.";
+
+      else
+        throw std::string ("Argument '") + arg->_first + "' is not allowed "
+          "with this command.";
+    }
+  }
+
+  return filter;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 bool Arguments::valid_modifier (const std::string& modifier)
 {
diff --git a/src/Arguments.h b/src/Arguments.h
index 1730ec5ea..5b6506b39 100644
--- a/src/Arguments.h
+++ b/src/Arguments.h
@@ -132,6 +132,7 @@ public:
   Arguments extract_read_only_filter ();
   Arguments extract_write_filter ();
   Arguments extract_modifications ();
+  Arguments extract_simple_words ();
 
   static bool valid_modifier (const std::string&);