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Date: Fri, 27 Sep 2013 15:43:53 -0700
From: Michael Forney <>
Subject: Re: [PATCH] mbsrtowcs: Fix bug when wn is a multiple of 4

On Fri, 27 Sep 2013 11:56:18 -0400, Rich Felker <> wrote:
> > Rather than adding an extra branch here, why not just either change
> > the >=4 condition to >=5 or unconditionally continue here? Any
> > thoughts on what would be better?
> Forget what I said about just continuing; it would lead to an infinite
> loop. I think checking for wn>=5 is probably the best solution to
> avoid extra branches in a fairly common code path (ASCII at an aligned
> position but not 4 ASCII characters in a row). At some point perhaps
> all of this code should be reworked (with proper benchmarking to
> measure the effect of changes) but for now we just need a fix.
> Rich

Yeah, I didn't make any performance considerations, I just figured this
would be the easiest/simplest fix. The solution you've committed is
fine. Thanks!

Michael Forney <>

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