Re: readline 5.0 bug with utf-8 characters + editing ?

[Chet Ramey]

Danny Milosavljevic wrote:
> Hi,
>
> Thank you for bash and readline :)
> I use it every day...
>
> However, I wonder if this is a known problem:

I do not believe that this is a readline problem.

> I use readline 5.0, and try the following:
>
> /* gcc -o testreadline testreadline.c -lreadline
> -ltermcap */
> /* readline 5.0 */
> /* set locale to some UTF-8 locale */

By this, I assume you mean you sent and export LANG or a similar
environment variable.

> /* run, enter "aaaäää" and press "Home" key. -> cursor
> pos wrong. 
> (ä is 2 bytes: octal 303, 244)
>    then enter any character -> cursor pos more wrong
>  */
>
> #include <stdio.h>
> #include <readline/readline.h>
>
> int
> main(int argc, char *argv[])
> {
>         char const*     line;
>         /* \033[1;31m */
>         while ((line =
> readline("\1\1\033[1;31m\1\2\343\200\216 bla
> \343\200\217 bla \343\200\207 ") )) {
>                 if (line && *line)
>                         add_history (line);
>         }
>
>         return 0;
> }

Unless you call setlocale() at the beginning of main(), the C
library will not arrange for the correct things to happen.  Even
things like MB_CUR_MAX will not evaluate the way you expect.

Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet )
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Chet Ramey, ITS, CWRU    chet@po.CWRU.Edu 
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