Re: 0xdeadbeef vs 0xdeadbeefL

From: tom st denis (tomstdenis_at_yahoo.com)
Date: 07/07/04

  • Next message: Andrea Arcangeli: "Re: Unnecessary barrier in sync_page()?" 
    Date:	Wed, 7 Jul 2004 11:41:50 -0700 (PDT)
To: Gabriel Paubert <paubert@iram.es>

    --- Gabriel Paubert <paubert@iram.es> wrote:
    > > So I'd say it thinks that all of the constants are "int". In this
    > case
    > > 0xFF is greater than 127 [max for char] and 0xFFFFFFFFFFULL is
    > larger
    >
    > You are aware that this statement is plainly and simply wrong,
    > aren't you?

    That goes right up there with, um nope. The only reason why the
    compiler doesn't error about it is because it's not an error. Doesn't
    mean it's right.

    > On many platforms a "plain" char is unsigned. You can't write
    > portable
    > code without knowing this.

    Um, actually "char" like "int" and "long" in C99 is signed. So while
    you can write

    signed int x = -3;

    You don't have to. in fact if you "have" to then your compiler is
    broken. Now I know that GCC offers "unsigned chars" but that's an
    EXTENSION not part of the actual standard.

    You ought to distinguish "what my compiler does" with "what the
    standard actually says". If you want unsigned chars don't be lazy,
    just write "unsigned char".

    As for writing portable code, um, jacka#!, BitKeeper, you know, that
    thingy that hosts the Linux kernel? Yeah it uses LibTomCrypt. Why not
    goto http://libtomcrypt.org and find out who the author is. Oh yeah,
    that would be me. Why not email Wayne Scott [who has code in
    LibTomCrypt btw...] and ask him about it?

    Who elses uses LibTomCrypt? Oh yeah, Sony, Gracenote, IBM [um Joy
    Latten can chip in about that], Intel, various schools including
    Harvard, Stanford, MIT, BYU, ...

    I write code that builds on basically any box with GCC which includes
    regular PCs, Macs, Gameboys, PS2, Suns, etc, etc, etc. All without
    changes....

    Tom

                    
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  • Next message: Andrea Arcangeli: "Re: Unnecessary barrier in sync_page()?"

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