Display, graphic, or printable characters? Lassi Kortela (11 Nov 2019 13:34 UTC)
Re: Display, graphic, or printable characters? John Cowan (11 Nov 2019 21:57 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (11 Nov 2019 22:07 UTC)
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Re: Display, graphic, or printable characters? Lassi Kortela (12 Nov 2019 11:53 UTC)
Re: Display, graphic, or printable characters? John Cowan (12 Nov 2019 17:13 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (18 Nov 2019 19:46 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (22 Nov 2019 12:56 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (22 Nov 2019 13:18 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (22 Nov 2019 13:20 UTC)
Re: Display, graphic, or printable characters? Lassi Kortela (11 Nov 2019 23:34 UTC)

Re: Display, graphic, or printable characters? Lassi Kortela 11 Nov 2019 23:34 UTC

>>> A character is "graphic" if it takes up room on the display surface: thus a
>>> letter, number, punctuation mark, symbol, combining character (none in
>>> ASCII), or any of Unicode's various space separator characters.  It is
>>> "printable" if it also leaves ink on the display surface, which excludes
>>> the last group.  (Unicode does not define "printable", but ISO C and C++
>>> do.)
>>
>> Based on BSD manual pages, isprint() is like isgraph() but also includes
>> the space character. isprint() does not include tab or newline.
>>
>
> Right.  Those move you around on the display surface as opposed to
> occupying it.

I guess the distinction is somewhat moot nowadays on video displays, and
especially in GUIs. A tab's width is still N characters' width.

The BSD graphic vs printable distinction is also swapped from your
explanation.