forked from bonsai/harakit
98 lines
2.7 KiB
Rust
98 lines
2.7 KiB
Rust
/*
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* Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
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* Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see https://www.gnu.org/licenses/.
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*/
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use std::{
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env::args,
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process::ExitCode
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};
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extern crate getopt;
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extern crate sysexits;
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use getopt::GetOpt;
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use sysexits::EX_USAGE;
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#[cfg(target_os="openbsd")] use sysexits::EX_OSERR;
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#[cfg(target_os="openbsd")] extern crate openbsd;
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#[cfg(target_os="openbsd")] extern crate strerror;
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#[cfg(target_os="openbsd")] use openbsd::{ Promises, pledge };
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#[cfg(target_os="openbsd")] use strerror::StrError;
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fn usage(s: &str) -> ExitCode {
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eprintln!("Usage: {} [-egl] integer integer...", s);
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ExitCode::from(EX_USAGE as u8)
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}
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fn main() -> ExitCode {
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let argv = args().collect::<Vec<String>>();
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#[cfg(target_os="openbsd")] {
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let promises = Promises::new("stdio");
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if let Err(e) = pledge(Some(promises), None) {
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eprintln!("{}: {}", argv[0], e.strerror());
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return ExitCode::from(EX_OSERR as u8);
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}
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}
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let mut e = false; /* args can be == */
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let mut g = false; /* args can be > */
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let mut l = false; /* args can be < */
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let mut optind = 0;
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if argv.len() < 3 { return usage(&argv[0]); }
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while let Some(opt) = argv.getopt("egl") {
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match opt.opt() {
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Ok("e") => e = true,
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Ok("g") => g = true,
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Ok("l") => l = true,
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_ => return usage(&argv[0]),
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}
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optind = opt.ind();
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}
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if !e & !g & !l { return usage(&argv[0]); }
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if argv.len() - optind < 2 /* see usage */ { return usage(&argv[0]); }
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let mut prev: Option<usize> = None; /* no previous operand */
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let mut currn: usize;
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for arg in argv.iter().skip(optind) { /* iterate operands */
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match arg.parse::<usize>() { /* parse current operand */
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Ok(n) => currn = n,
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Err(e) => {
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eprintln!("{}: {}: {}", &argv[0], arg, e);
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return ExitCode::from(EX_USAGE as u8);
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}
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}
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if let Some(prevn) = prev { /* if there was a previous opr., test */
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if (!e && prevn == currn)
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|| (!g && prevn > currn)
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|| (!l && prevn < currn)
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{ return ExitCode::FAILURE; }
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}
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prev = Some(currn); /* there is a previous operand */
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}
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ExitCode::SUCCESS
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}
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