From xie at yihui.name  Fri May 16 21:52:58 2014
From: xie at yihui.name (Yihui Xie)
Date: Fri, 16 May 2014 14:52:58 -0500
Subject: [Rd] Bug in read.dcf(all = TRUE)?
In-Reply-To: <CANROs4fMB6ReAcZOcXZDTxc_ELP3ju7rNWi7vdy0ZkROqqbvxQ@mail.gmail.com>
References: <CANROs4fMB6ReAcZOcXZDTxc_ELP3ju7rNWi7vdy0ZkROqqbvxQ@mail.gmail.com>
Message-ID: <CANROs4dhbLs-yQUfm-eWXph_odtGQLcZ8mG0oOZhrC=jtH4F_g@mail.gmail.com>

Cc'ing Kurt since the version control history shows he brought it in a
few years ago: https://github.com/wch/r-source/commit/53d4b432f7

The fix can be fairly simple if someone has one minute:

    lc_ctype <- Sys.getlocale("LC_CTYPE")
    on.exit(Sys.setlocale("LC_CTYPE", lc_ctype), add = TRUE)
    Sys.setlocale("LC_CTYPE", "C")

although I do not really understand why LC_CTYPE has to be changed to "C".

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Web: http://yihui.name


On Wed, May 14, 2014 at 4:34 PM, Yihui Xie <xie at yihui.name> wrote:
> Hi,
>
> read.dcf() can modify the locale variable LC_CTYPE, and here is a
> minimal example:
>
>> Sys.getlocale('LC_CTYPE')
> [1] "en_US.UTF-8"
>> read.dcf(textConnection('a: b'), all = TRUE)
>   a
> 1 b
>> Sys.getlocale('LC_CTYPE')
> [1] "C"
>
> After diagnosing the problem, it seems the on.exit() call in
> read.dcf() is the culprit:
>
>     on.exit(Sys.setlocale("LC_CTYPE", Sys.getlocale("LC_CTYPE")), add = TRUE)
>     Sys.setlocale("LC_CTYPE", "C")
>
> https://github.com/wch/r-source/blob/96a2cc920/src/library/base/R/dcf.R#L68-L69
>
>> sessionInfo()
> R version 3.1.0 (2014-04-10)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
>  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
> LC_TIME=en_US.UTF-8
>  [4] LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8
> LC_MESSAGES=en_US.UTF-8
>  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
> LC_ADDRESS=C
> [10] LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8
> LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> loaded via a namespace (and not attached):
> [1] tools_3.1.0
>
>
> Regards,
> Yihui
> --
> Yihui Xie <xieyihui at gmail.com>
> Web: http://yihui.name



[Rd] Bug in read.dcf(all = TRUE)?
Yihui Xie