Re: Can't convert control characters

[Mitsuru Chinen]

Hello,

Thomas Dickey <address@hidden> wrote:

> > At that line, setcchar() returns ERR when wcwidth() returns negative value.
> > Because wcwidth() returns -1 when a wide character is non-printable,
> > setcchar() returns ERR if control character is given.
> 
> ok (the last few occurrences of wcwidth that I fixed were for the case
> when its parameter was a printable 8-bit character).  At the moment it's
> not clear whether "non-printable" in this sense applies to control
> characters, or non-spacing characters.

I applyed "non-printable" to control characters.
I meant "non-printable" as the character classification of Locale.
Namely, when "non-printable" characters are checked by iswprint(),
the function returns 0.
Control characters are not able to be included in print character class
according to POSIX.

I suppose non-spacing characters are classified as printable character
and its width is 0.

Regards,
-------
Mitsuru Chinen
// AP Linux Technology Center, 
// Yamato Software Lab., SWG, IBM;