Message-ID:	<37B5D75B.7DB28AC@unb.ca>
From:	Endlisnis <s257m AT unb DOT ca>
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: From Bytes to Int and Char
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Date:	Sat, 14 Aug 1999 20:54:57 GMT
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Chris Holmes wrote:

> Endlisnis wrote:
> >
> >     But, your code did the same thing, it casted it as a short* (which you stored in a
> > temporary variable) and then augmented it with an offset.  You code would do the EXACT
> > same thing as mine on any and all machines.  Both mechanisms were interpreting the int in
> > a 'native' way.  What I was trying to say, was that if the file was saved in a big-endian
> > machine and you were using a little-endian machine... both of our codes would not work.
>
>   Yes, BUT if you RECOMPILED my code with a big-endian compiler, it
> would at least in theory produce the right output.  My code put the
> work for conversion on the compiler's head, so if I moved to a
> big-endian compiler, then I wouldn't have to change my code.

char*Buff;

Your code:
short* int_buff = (short*)buff;
int val = int_buff[8];

My code;

int val = *(short*)(Buff+8);
//I don't remember if the index really was '8' but that's not the point.


My code, if compiled on a big-endian compiler, would also produce the right output (if the
buffer was written by a big-endian program).  The only way to make it really endian safe, would
be to use one of the POSIX function that comes with tcp/ip libraries which converts local
format to big-endian format.  It is designed to be portable.

--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT HotMail DOT com
          ICQ: 32959047

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