Message-ID: <339C40FA.15F9@piper.hamline.edu>
Date: Mon, 09 Jun 1997 12:44:26 -0500
From: Randall Maas <rcmaas AT piper DOT hamline DOT edu>
Reply-To: rcmaas AT piper DOT hamline DOT edu
Organization: Geek Week
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: VBE Bankswitch in Pmode
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To: djgpp AT delorie DOT com
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>> #if !defined(__GO32_H)
>> #include <go32.h>
>> #endif

>All those #ifs and #endifs are redundant: all of the header files in
>question are idempotent, that is wrapped in the same #ifs inside
>themselves to begin with. All header files that are distributed with >DJGPP are. Any decent header file is...

True.  But having those checks inside our your .c .h files is also
good.  If you didn't, the cpp has to *load* and *parse* the .h file
again, even though it adds nothing.  By checking to see if you already
included it, you can save yourself the load and scan time.  (Of course,
a good file cache also helps trim down the load time).


Randy Maas
randym AT xiotech DOT com