Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!ames!pasteur!ucbvax!van-bc!rsoft!mindlink!a464
From: a464@mindlink.UUCP (Bruce Dawson)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Fonts and freeing memory
Message-ID: <956@mindlink.UUCP>
Date: 16 Jan 90 17:12:02 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 16


     Ignoring the fact that OpenFont() is NOT needed before a call to
OpenDiskFont(), there is nothing wrong with the following code:

     if (!(winfont = (struct TextFont *)OpenFont(&ta)) &&
          !(winfont = (struct TextFont *)OpenDiskFont(&ta)))
               blah blah it didn't work.

     C _guarantees_ that the first expression will be evaluated first.
Furthermore, it guarantees that if the first expression fails, the second
expression will not be executed at all.  If you look at K&R, you will find some
programs that _depend_ on this for proper execution.  However, as has been
pointed out, from an Amiga point of view that code is bunk, because the call to
OpenFont() isn't necessary.

.Bruce.