From: rick.jones2@hp.com   
      
   Jorgen Grahn  wrote:   
   > A brief question: are htonl(), ntohl() and friends allowed to   
   > evaluate their argument more than once (i.e. if they're implemented   
   > naively as macros?)   
      
   > The man pages I've seen are silent on the subject so one would   
   > assume they behave like normal functions -- but I've wasted a day   
   > debugging a problem caused by my (in-house) implementation   
   > evaluating the argument four times.   
      
   Not that I've ever seen any real chapter and verse on htonl/ntohl, my   
   gut is telling me I bet that sort of issue was never really   
   considered and so would be undefined.   
      
   rick jones   
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