added trim operand function.

ZString.h

@@ -248,6 +248,14 @@ namespace coreutils {
       ///
       
       bool eod();
+
+      ///
+      /// Go to the end of data.
+      ///
+      /// Return number of bytes the cursor was moved. 
+      ///
+
+      int goeod();
       
       ///
       ///
@@ -312,7 +320,7 @@ namespace coreutils {
       
       ///
       /// Advance the cursor through the ZString for each whitespace character
-      /// encountered.
+      /// encountered. 
       ///
       
       int skipWhitespace();
@@ -321,6 +329,12 @@ namespace coreutils {
       ///
       ///
 
+      int trimTrailingWhitespace();
+      
+      ///
+      ///
+      ///
+
       bool lineIsWhitespace();
       
       ///