Makefile

@@ -28,7 +28,7 @@ RUSTLIBS = --extern getopt=build/o/libgetopt.rlib \
 CFLAGS += -I$(SYSEXITS)
 
 .PHONY: all
-all: dj false fop hru intcmp mm npc rpn scrut str strcmp swab true
+all: dj false fop hru intcmp mm npc rpn scrut str strcmp stris swab true
 
 build:
 	# keep build/include until bindgen(1) has stdin support
@@ -123,6 +123,14 @@ str: build/bin/str
 build/bin/str: src/str.c build
 	$(CC) $(CFLAGS) -o $@ src/str.c
 
+.PHONY: stris
+stris: build/bin/stris
+build/bin/stris: src/stris.rs build build/o/libgetopt.rlib \
+		build/o/libsysexits.rlib
+	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
+		--extern sysexits=build/o/libsysexits.rlib \
+		-o $@ src/stris.rs
+
 .PHONY: strcmp
 strcmp: build/bin/strcmp
 build/bin/strcmp: src/strcmp.c build
@@ -130,7 +138,8 @@ build/bin/strcmp: src/strcmp.c build
 
 .PHONY: swab
 swab: build/bin/swab
-build/bin/swab: src/swab.rs build build/o/libsysexits.rlib
+build/bin/swab: src/swab.rs build build/o/libgetopt.rlib \
+		build/o/libsysexits.rlib
 	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
 		--extern sysexits=build/o/libsysexits.rlib \
 		-o $@ src/swab.rs

docs/stris.1

@@ -0,0 +1,118 @@
+.\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
+.\" Copyright (c) 2023 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 STRIS 1
+
+.SH NAME
+
+stris \(en test the character types of string arguments
+
+.SH SYNOPSIS
+
+stris
+.RB ( -7bcdlu )
+.RB ( -i [ inclusions ])
+.RB [ strings... ]
+
+.SH DESCRIPTION
+
+Stris tests each rune in an arbitrary quantity of string arguments, ensuring
+each meets any of the parameters specified in the program options.
+
+.SH OPTIONS
+
+.B -7
+.RS
+Tests to see if runes are fit within seven bits; that is, that they are encoded
+with ASCII.
+.RE
+
+.B -b
+.RS
+Tests to see if runes are blank or "whitespace"; characters that do not print
+but fill a predictable amount of space.
+.RE
+
+.B -c
+.RS
+Tests to see if runes are control characters; characters that are not printing
+or graphical.
+.RE
+
+.B -d
+.RS
+Tests to see if runes are numeric. This test does not only allow the ASCII
+digits but any numeric symbol.
+.RE
+
+.B -i
+.RS
+Permits, in addition to the given specified parameters, all of the runes
+supplied in its option argument.
+.RE
+
+.B -l
+.RS
+Tests to see if runes are in their lower case.
+.RE
+
+.B -u
+.RS
+Tests to see if runes are in their upper case, or capitalized.
+.RE
+
+.SH DIAGNOSTICS
+
+Stris exits successfully if all runes in all given strings meet any of the
+specified parameters, or if no parameters were specified but all given strings
+were legibly encoded. It exits unsuccessfully if the previous is untrue, and if
+invalid options were given, or if no strings were given, a usage synopsis will
+be printed to the standard error.
+
+.SH BUGS
+
+There's no way of knowing which argument failed the test without re-testing
+arguments individually.
+
+Some runes that can losslessly be encoded into ASCII from UTF-8 but in an
+"overlong encoding", where the rune was encoded with unnecessary leading
+zeroes causing it to span multiple bytes, won't be detected as ASCII.
+
+.SH EXAMPLES
+
+This is an sh(1p) snippet that checks to see if an environment variable is an
+ASCII digit.
+
+.RS
+.R stris -7 "$v" && stris -d "$v" && echo ASCII digit.
+.RE
+
+This is an sh(1p) snippet that checks to see if an environment variable is a
+hexadecimal number.
+
+.RS
+.R stris -7 "$v" && stris -di ABCDEFabcdef "$v" && echo Hexadecimal number.
+.RE
+
+.SH AUTHOR
+
+Written by DTB <trinity@trinity.moe>.
+
+.SH HISTORY
+
+Stris replaces the former str(1) which took the name of a function from
+ctype(3) as its first argument and checked the following strings against it;
+str(1) exited unsuccessfully when it encountered any non-ASCII runes and could
+only have one parameter specified.
+
+.SH COPYRIGHT
+
+Copyright © 2023–2024 DTB. License AGPLv3+: GNU AGPL version 3 or later
+<https://gnu.org/licenses/gpl.html>.
+
+.SH SEE ALSO
+
+ascii(7), ctype(3p), strcmp(1)

src/stris.rs

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
+ * Copyright (c) 2023 Marceline Cramer <mars@tebibyte.media>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see https://www.gnu.org/licenses/.
+ */
+
+use std::{
+	env::args,
+	process::ExitCode
+};
+
+extern crate getopt;
+use getopt::{ Opt, Parser };
+
+extern crate sysexits;
+use sysexits::EX_USAGE;
+
+struct Reqs {
+	ascii: bool, blank: bool, cntrl: bool, digit: bool, lower: bool,
+	upper: bool, inuse: bool, extra: String
+}
+
+fn usage(s: &str) -> ExitCode {
+	eprintln!("Usage: {} (-7bcdlu) (-i [inclusions]) [strings...]", s);
+	ExitCode::from(EX_USAGE as u8)
+}
+
+fn main() -> ExitCode {
+	let argv = args().collect::<Vec<String>>();
+	let mut opts = Parser::new(&argv, "7bcdi:lu");
+	let mut reqs = Reqs {
+		ascii: false, blank: false, cntrl: false, digit: false, lower: false,
+		upper: false, inuse: false, extra: String::new()
+	};
+
+	loop {
+		match opts.next() {
+			None => break,
+			Some(opt) => {
+				match opt {
+					Ok(Opt('7', None)) => reqs.ascii = true,
+					Ok(Opt('b', None)) => reqs.blank = true,
+					Ok(Opt('c', None)) => reqs.cntrl = true,
+					Ok(Opt('d', None)) => reqs.digit = true,
+					Ok(Opt('i', Some(arg))) => reqs.extra = arg,
+					Ok(Opt('l', None)) => reqs.lower = true,
+					Ok(Opt('u', None)) => reqs.upper = true,
+					_ => { return usage(&argv[0]); }
+				}
+				reqs.inuse = true;
+			}
+		}
+	}
+
+	if argv.len() == opts.index() {
+		return usage(&argv[0]);
+	}
+
+	drop(argv);
+
+	if reqs.inuse {
+		'args: for arg in args().skip(opts.index()) {
+			for c in arg.chars() {
+				if (reqs.ascii && c.is_ascii())
+						|| (reqs.blank && c.is_whitespace())
+						|| (reqs.cntrl && c.is_control())
+						|| (reqs.digit && c.is_numeric())
+						|| (reqs.lower && c.is_lowercase())
+						|| (reqs.upper && c.is_uppercase())
+						|| reqs.extra.contains(c) {
+					continue 'args;
+				} else {
+					return ExitCode::FAILURE;
+				}
+			}
+		}
+	}
+
+	ExitCode::SUCCESS
+}