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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: iso646.h
Date: Wed, 31 Jan 2024 13:26:33 -0800
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Kaz Kylheku <433-929-6894@kylheku.com> writes:
> On 2024-01-31, Keith Thompson <Keith.S.Thompson+u@gmail.com> wrote:
>> Terminal control sequences (almost always based on VT100 these days) are
>> typically not printable, but tend to avoid null characters, which means
>> you can very probably use printf to print them (assuming you're on a
>> POSIX-like system).
>
> They use text. For instance, a cursor position is both accepted and
> reported in a decimal format like 13;17.  All the commands and
> delimiting characters are textual, except for part of the CSI (control
> sequence introducer). The 7 bit CSI uses two characters, ESC and [.
> Except for that one ESC, everything is printable.

I'd describe "printable except for ESC" as binary.  And some sequences
use other non-printable characters like ASCII BEL (Ctl-G) (perhaps not
VT100 standard, but for example commands to change fonts and colors for
xterm).

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */