Date: Sat, 3 Apr 2021 13:22:50 +0300 From: Yuri Pankov <yuripv@yuripv.dev> To: Alexey Dokuchaev <danfe@nsu.ru>, Ed Maste <emaste@freebsd.org> Cc: hackers@freebsd.org Subject: Re: wcwidth() and wcswidth() and Latin vs. CJK character width Message-ID: <a3e3d32c-de37-01a4-03ff-081f12823160@yuripv.dev> In-Reply-To: <20210403063423.GA50619@regency.nsu.ru> References: <20210324143117.GA61738@regency.nsu.ru> <CAPyFy2Aw6BTyuG_6Fd8a9yMCa3kstLuxx_nBM474ftsMe4_YWw@mail.gmail.com> <20210403063423.GA50619@regency.nsu.ru>
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Alexey Dokuchaev via freebsd-hackers wrote: > On Fri, Apr 02, 2021 at 04:51:49PM -0400, Ed Maste wrote: >> On Wed, 24 Mar 2021 at 10:37, Alexey Dokuchaev via freebsd-hackers >> wrote: >>> I've been wondering if there's anything like Markus Kuhn's >>> implementation* in our base libraries for $subj (my quick naive >>> search didn't turn up any results). If yes, could someone point >>> me at it? >> >> Kuhn's implementation is in the kernel for teken >> (sys/teken/teken_wcwidth.h). But, wcwidth/wcswidth are available >> already in userland, > > Our default wcwidth(3) does not seem to work as described, but then > I've found that Kuhn's code is also part of the libxo(3) which what > I should have probably used in the first place. > >> is there some reason you are looking at Kuhn's implementation >> specifically? > > I want to improve the "ifconfig wlan0 list scan" output, e.g. it > currently does not display SSIDs which are in Russian or CJK, but > conversion to libxo(3) would address both this problem and make > the output easily consumable by external tools. I think this could be easily fixed by adding setlocale(LC_ALL, "") call to ifconfig's main(), wcwidth() won't work properly without correct locale set (at least, without LC_CTYPE).
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