Added lineIsWhitespace function.

ZString.cpp

@@ -311,6 +311,19 @@ namespace coreutils {
       return len;
    }
 
+   bool ZString::lineIsWhitespace() {
+      char *end = data + length;
+      char *temp = cursor;
+      while(temp < end) {
+	 if(*temp == '\n')
+	   return true;
+	 if((*temp != ' ') && (*temp != '\t'))
+	   return false;
+	 ++temp;
+      }
+      return true;
+   }
+      
    ZString ZString::goeol() {
       bool set = false;
       char *temp = cursor;

ZString.h

@@ -298,6 +298,12 @@ namespace coreutils {
       ///
       ///
 
+      bool lineIsWhitespace();
+      
+      ///
+      ///
+      ///
+      
       ZString goeol();
       
       ///

testing/zstring_test.cpp

@@ -64,4 +64,11 @@ int main(int argc, char **argv) {
    coreutils::ZString test6 = test5.getTokenExclude("\n");
    std::cout << test6 << std::endl;
 
+   coreutils::ZString test7 = "this is a line\n       \nthis is another line\n     ";
+   std::cout << test7.lineIsWhitespace() << test7.goeol() << std::endl;
+   std::cout << test7.lineIsWhitespace() << test7.goeol() << std::endl;
+   std::cout << test7.lineIsWhitespace() << test7.goeol() << std::endl;
+   std::cout << test7.lineIsWhitespace() << test7.goeol() << std::endl;
+   
+   
 }