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Re: [PATCH] READLINE_POINT with multibyte locales

From: Chet Ramey
Subject: Re: [PATCH] READLINE_POINT with multibyte locales
Date: Mon, 9 Apr 2018 11:26:40 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.7.0

On 4/9/18 10:51 AM, Koichi Murase wrote:

> Bash Version: 4.4
> Patch Level: 19
> Release Status: release
> Description:
>   Currently `READLINE_POINT' counts the number of bytes but not
> characters. This makes difficult to properly implement shell functions
> for `bind -x' that uses `READLINE_POINT'. In fact, almost all the
> implementations of `bind -x' functions which can be found in the
> internet is broken for this point.

Because the underlying readline variable that it controls, rl_point, is
kept in bytes -- an index into the line buffer. If you change this, it
will set the point to the wrong place in the buffer (exposed to that
function as READLINE_LINE).

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/

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