118 lines
4.1 KiB
Rust
118 lines
4.1 KiB
Rust
/*
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* Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
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* SPDX-License-Identifier: LGPL-3.0-or-later
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*
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* This file is part of yacexits.
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*
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* Yacexits is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser 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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* Yacexits is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser 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 Lesser General Public License
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* along with yacexits. If not, see <https://www.gnu.org/licenses/>.
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*
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* This file incorporates work covered by the following copyright and permission
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* notice:
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*
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* Copyright 2023 Douman
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*
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* Boost Software License - Version 1.0 - August 17th, 2003
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*
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* Permission is hereby granted, free of charge, to any person or
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* organization obtaining a copy of the software and accompanying
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* documentation covered by this license (the "Software") to use, reproduce,
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* display, distribute, execute, and transmit the Software, and to prepare
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* derivative works of the Software, and to permit third-parties to whom the
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* Software is furnished to do so, all subject to the following:
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*
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* The copyright notices in the Software and this entire statement,
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* including the above license grant, this restriction and the following
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* disclaimer, must be included in all copies of the Software, in whole or
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* in part, and all derivative works of the Software, unless such copies or
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* derivative works are solely in the form of machine-executable object code
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* generated by a source language processor.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
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* DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY,
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* WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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mod args;
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mod errors;
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pub use args::Args;
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pub use errors::*;
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use crate::{
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exit,
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EX_USAGE,
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};
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use libc::{
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c_int,
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strlen,
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};
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use libc_print::libc_eprintln;
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///Converts C string to Rust's, verifying it is UTF-8
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///
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///It is UB to pass non-C string as it requires \0
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pub unsafe fn c_str_to_rust(
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ptr: *const u8
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) -> Result<&'static str, core::str::Utf8Error> {
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let len = strlen(ptr as *const i8);
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let parts = core::slice::from_raw_parts(ptr, len);
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core::str::from_utf8(parts)
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}
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///Converts C string to Rust's one assuming it is UTF-8
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///
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///It is UB to pass non-C string as it requires \0
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pub unsafe fn c_str_to_rust_unchecked(ptr: *const u8) -> &'static str {
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let len = strlen(ptr as *const i8);
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let parts = core::slice::from_raw_parts(ptr, len);
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core::str::from_utf8_unchecked(parts)
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}
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extern "Rust" {
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fn rust_main(args: args::Args) -> Result<u32, YacError>;
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}
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#[doc(hidden)]
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#[cfg(not(test))]
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#[no_mangle]
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pub unsafe extern fn main(argc: c_int, argv: *const *const u8) -> c_int {
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match Args::new(argc as isize, argv) {
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Ok(args) => {
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let argv0 = &args
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.into_iter()
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.next()
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.unwrap_or_else(|| {
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libc_eprintln!("Unable to ascertain argv[0].");
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exit(71);
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});
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rust_main(args).unwrap_or_else(|err| {
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if err.code == EX_USAGE {
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libc_eprintln!("Usage: {} {}", argv0, err.message);
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} else { libc_eprintln!("{}: {}", argv0, err.message); }
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err.code
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}) as _
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},
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Err(_) => {
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libc_eprintln!("Arguments are not valid UTF-8.");
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65
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},
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}
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}
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