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Newsgroups: comp.std.c
From: "Greg A. Woods" <woods@robohack.org>
Subject: Re: PRI* considered harmful
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Date: Fri, 08 Jul 2011 23:14:27 -0700
Xref: x330-a1.tempe.blueboxinc.net comp.std.c:670

Richard Kettlewell <rjk@greenend.org.uk> writes:

> "Greg A. Woods" <woods@robohack.org> writes:
>> Keith Thompson <kst-u@mib.org> writes:
>
>>> I suggest that, at least in this specific case, you're looking for
>>> problems that are unlikely to exist in any real implementation.
>>
>> You mean like in some versions GNU/Linux, or more specifically, I think,
>> some(all?) versions of glibc where PRId32 is "%ld" even on 32-bit
>> systems with 32-bit ints and where int32_t is a "signed int"?  At least
>> as far as I can tell. (I don't generally use GNU/Linux, and I despise
>> glibc for many other reasons than this :-))
>
> Glibc on 32-bit Linux has int32_t = signed int and PRId32 = %d.

I've seen dozens of examples in internet searches where PRId32 is "ld"
on many kinds of GNU/Linux distributions.

Even the manual page prid32(3) says so in representative examples that
I've bothered to look at.  (google's "lucky one" at the moment is this
one <URL:http://linux.die.net/man/3/prid32>)

Where did you find it to be just "d"?  (I'm asuming you mean just "d",
not really "%d" :-))


I couldn't quite work out whether int32_t was usually "signed int" or
not though without getting a login on a representative machine to
compile some test code on, but that's what I was assuming.

-- 
						Greg A. Woods
						RoboHack

<woods@robohack.ca>     living on the edge      http://www.robohack.ca/