From: Jens Gustedt <jens.gustedt@inria.fr>
To: musl@lists.openwall.com
Subject: Re: Possible infinite loop in qsort()
Date: Sun, 10 Jan 2016 17:45:06 +0100 [thread overview]
Message-ID: <1452444306.13025.1.camel@inria.fr> (raw)
In-Reply-To: <CANv4PN=+v50LQdYM5TjJ-ejdWwrzz3PpXrWF-o9mZfhiNhG87g@mail.gmail.com>
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Am Sonntag, den 10.01.2016, 11:35 -0500 schrieb Morten Welinder:
> > In that case, you can massively optimize out the whole sort
> > by just counting the number of times each byte appears [...]
>
> That isn't. sizeof(char) is guaranteed to be 1. Is it not, however,
> required to represent bytes. You could have sizeof(pointer) be
> 1 also and if you so, you really cannot do sorting by counting.
Generally for C it isn't, but for POSIX it is. char there always have
8 bit. So if we are also supposing that pointers have more than 8 bit :)
we never have sizeof(pointer) to be 1. So in that sense we are safe for
musl.
Jens
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next prev parent reply other threads:[~2016-01-10 16:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-09 8:21 Markus Wichmann
2016-01-09 9:07 ` Felix Janda
2016-01-10 4:05 ` Rich Felker
2016-01-10 10:33 ` Szabolcs Nagy
2016-01-10 11:38 ` Alexander Monakov
2016-01-10 11:38 ` Markus Wichmann
2016-01-10 12:15 ` Szabolcs Nagy
2016-01-12 12:25 ` Alexander Cherepanov
2016-01-12 12:48 ` Szabolcs Nagy
2016-01-12 14:31 ` Alexander Cherepanov
2016-01-12 16:22 ` Szabolcs Nagy
2016-01-14 22:21 ` Rich Felker
2016-01-14 22:17 ` Rich Felker
2016-01-10 16:35 ` Morten Welinder
2016-01-10 16:45 ` Jens Gustedt [this message]
2016-01-12 10:30 ` Alexander Cherepanov
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