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From: Yoann Padioleau <padiolea@merlin.irisa.fr>
Newsgroups: comp.lang.ada,comp.lang.c,comp.lang.c++,comp.lang.functional
Subject: Re: How Ada could have prevented the Red Code distributed denial of
    service attack.
Date: 06 Aug 2001 17:02:55 +0200
Organization: IRISA, Campus de Beaulieu, 35042 Rennes Cedex, FRANCE
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Xref: archiver1.google.com comp.lang.ada:11371 comp.lang.c:72461
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Date: 2001-08-06T15:03:07+00:00
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info@hoekstra-uitgeverij.nl (Richard Bos) writes:

> Ted Dennison<dennison@telepath.com> wrote:
> 
> > compiler. Remember, "printf" actually has to stop and interpret the input string
> > to look for replacements.
> 
> No, it doesn't; not unless the format string isn't a constant.
Yes it does. The source code from printf is in the C library, so the compiler
cant optimise code such as 'printf("%d    %f   %s",i,f,str)', he cant
generate print_int(i);print_space(4);print_float(f);....
This is called partial evaluation, and in practice it is hard to put
in a compiler.



> Richard

-- 
Yoann  Padioleau,  INSA de Rennes, France,   http://www.irisa.fr/prive/padiolea
Opinions expressed here are only mine. Je n'�cris qu'� titre personnel.
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