From: Bobby Bingham <email@example.com>
Subject: Re: [RFC] new qsort implementation
Date: Mon, 1 Sep 2014 16:46:23 -0500 [thread overview]
Message-ID: <20140901214623.GA10395@duality.lan> (raw)
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On Mon, Sep 01, 2014 at 04:53:42PM -0400, Rich Felker wrote:
> > I thought I recalled hearing that SSIZE_MAX was the upper bound on all
> > object sizes in musl, but if we still allow larger mmaps than that, I
> > guess not. I'll find a different approach when I send the next version
> > of the code.
> You are correct and nsz is mistaken on this. musl does not permit any
> object size larger than SSIZE_MAX. mmap and malloc both enforce this.
> But I'm not sure why you've written bsearch to need this assumption.
> The bsearch in musl gets by fine without it.
The point of this was that bsearch returns NULL if the element is not
found, but I need to know where the element would have been had it been
present. The bitwise complement is used so that bsearch, written as a
wrapper around __bsearch, can tell whether the element was present or
not without requiring an extra comparison.
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next prev parent reply other threads:[~2014-09-01 21:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 7:12 Bobby Bingham
2014-09-01 11:17 ` Szabolcs Nagy
2014-09-01 18:20 ` Bobby Bingham
2014-09-01 20:53 ` Rich Felker
2014-09-01 21:46 ` Bobby Bingham [this message]
2014-09-01 11:25 ` Alexander Monakov
2014-09-01 18:27 ` Bobby Bingham
2023-02-17 15:51 ` [musl] " Rich Felker
2023-02-17 22:53 ` Rich Felker
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