From: Cyril Hrubis <chrubis@suse.cz>
To: Petr Vorel <pvorel@suse.cz>
Cc: ltp@lists.linux.it, linux-nfs@vger.kernel.org,
Andrea Cervesato <andrea.cervesato@suse.com>
Subject: Re: [PATCH 1/1] aiodio: Fix format string for 32bit
Date: Fri, 5 Aug 2022 11:34:31 +0200 [thread overview]
Message-ID: <YuzkJ8cwOVEEkAVT@yuki> (raw)
In-Reply-To: <20220803173211.14292-1-pvorel@suse.cz>
Hi!
> On 32bit char pointer is int and size_t is unsigned int,
> Cast to long / unsigned long.
Actually char pointer is char pointer, that is not an integer type at
all. If you do a pointer difference you end up with an signed integer
value of ptrdiff_t type, because unlike the result of sizeof(foo)
pointer difference can be negative as well. In C99 ptrdiff_t can be
printed as %td see the "Length modifier" part of man 3 printf.
--
Cyril Hrubis
chrubis@suse.cz
prev parent reply other threads:[~2022-08-05 9:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 17:32 [PATCH 1/1] aiodio: Fix format string for 32bit Petr Vorel
2022-08-05 9:34 ` Cyril Hrubis [this message]
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