There are more than 100 places in the code base where ftell() and fseek() calls are used and at all these places the integer constants have been used instead of the symbolic names. To fix this would be a more general improvement work where a lot of files would have to be touched. I don't want to do such a change now as it is not related to adding the windows support. I just followed the existing convention in the code (although you are right with your comment). You may update it as a separate commit.