Messages in this thread | | | Date | Wed, 7 Jul 2004 11:41:50 -0700 (PDT) | From | tom st denis <> | Subject | Re: 0xdeadbeef vs 0xdeadbeefL |
| |
--- 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
__________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |