Nibbler

- Implemented Nibbler::getN, which allows for faster extraction of
  compound tokens if the length is known.

src/Nibbler.cpp

@@ -216,6 +216,19 @@ bool Nibbler::getUntilEOS (std::string& result)
   return false;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool Nibbler::getN (const int quantity, std::string& result)
+{
+  if (mCursor + quantity < mLength)
+  {
+    result = mInput.substr (mCursor, quantity);
+    mCursor += quantity;
+    return true;
+  }
+
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 bool Nibbler::getQuoted (
   char c,