.\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
.\"
.\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
.\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
.\"
.TH STR 1
.SH NAME
str \(en test the character types of string arguments
.\"
.SH SYNOPSIS
.\"
str
.RB [ type ]
.RB [ string... ]
.\"
.SH DESCRIPTION
.\"
Test string arguments.

The tests in this program are equivalent to the functions with the same names in
.BR ctype.h (0p)
and are the methods by which string arguments are tested.
.\"
.SH DIAGNOSTICS
.\"
If all tests pass, the program will exit with an exit code of 0. If any of the
tests fail, the program will exit unsuccessfully with an error code of 1.

An empty string will cause an unsuccessful exit as none of its contents pass any
tests.

When invoked incorrectly, a debug message will be printed and the program will
exit with the appropriate sysexits.h(3) error code.
.\"
.SH CAVEATS
.\"
There’s no way of knowing which argument failed the test without re-testing
arguments individually.

If a character in a string isn't valid ASCII str will exit unsuccessfully.
.\"
.SH AUTHOR
.\"
Written by DTB
.MT trinity@trinity.moe
.ME .
.\"
.SH COPYRIGHT
.\"
Copyright © 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
<https://gnu.org/licenses/gpl.html>.
.\"
.SH SEE ALSO
.BR ctype (3p),
.BR strcmp(1),
.BR ascii(7)