lib/writeexcel/helper.rb in writeexcel-0.6.4 vs lib/writeexcel/helper.rb in writeexcel-0.6.5

@@ -64,5 +64,12 @@
       expn += 1
     end
     col
   end
   private :chars_to_col
+
+  NonAscii = /[^!"#\$%&'\(\)\*\+,\-\.\/\:\;<=>\?@0-9A-Za-z_\[\\\]\{\}^` ~\0\n]/
+
+  def is_utf8?(str)
+    ruby_18 { str =~ NonAscii } ||
+    ruby_19 { str.encoding == Encoding::UTF_8 }
+  end