From: Damian Yerrick <MYNAMEISd_yerrick AT hotmail DOT comNO2CANNEDHAM>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: big-endian and little endian binaries
Organization: Pin Eight Software <http://pineight.8m.com/>
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References: <85reog$bqi$1 AT plato DOT harvard DOT edu>
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NNTP-Posting-Date: Sun, 16 Jan 2000 03:58:42 GMT
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Date: Sun, 16 Jan 2000 03:58:42 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

"Greg Wellenius" <gwelleni AT hsph DOT harvard DOT edu> wrote in message
<85reog$bqi$1 AT plato DOT harvard DOT edu>...
>Hello,
>
>Any ideas on how, in C++,  I might be able to write big-endian numbers
>(2-byte ints in this case) to a binary file when I'm on a machine that uses
>little-endian format?

You could start with these:


/* fputbe2i()
 * write a big-endian (Motorola) 2-byte integer to a file
 */

int fputbe2i(FILE *fp, short n)
{
  fputc((n >>  8) & 0xff, fp);
  fputc((n      ) & 0xff, fp);
}


/* fputbe4i()
 * write a big-endian (Motorola) 4-byte integer to a file
 */

int fputbe4i(FILE *fp, int n)
{
  fputc((n >> 24) & 0xff, fp);
  fputc((n >> 16) & 0xff, fp);
  fputc((n >>  8) & 0xff, fp);
  fputc((n      ) & 0xff, fp);
}


I know I may be reinventing the wheel, but I couldn't find anything of
the sort in info libc.

-- 
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