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use crate::ffi::OsString;
use crate::fmt;
use crate::vec;
/// One-time global initialization.
pub unsafe fn init(argc: isize, argv: *const *const u8) {
imp::init(argc, argv)
}
/// One-time global cleanup.
pub unsafe fn cleanup() {
imp::cleanup()
}
/// Returns the command line arguments
pub fn args() -> Args {
imp::args()
}
pub struct Args {
iter: vec::IntoIter<OsString>,
}
impl fmt::Debug for Args {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.iter.as_slice().fmt(f)
}
}
impl !Send for Args {}
impl !Sync for Args {}
impl Iterator for Args {
type Item = OsString;
fn next(&mut self) -> Option<OsString> {
self.iter.next()
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
}
impl ExactSizeIterator for Args {
fn len(&self) -> usize {
self.iter.len()
}
}
impl DoubleEndedIterator for Args {
fn next_back(&mut self) -> Option<OsString> {
self.iter.next_back()
}
}
mod imp {
use super::Args;
use crate::ffi::{CStr, OsString};
use crate::os::unix::ffi::OsStringExt;
use crate::ptr;
use crate::sys_common::mutex::StaticMutex;
static mut ARGC: isize = 0;
static mut ARGV: *const *const u8 = ptr::null();
static LOCK: StaticMutex = StaticMutex::new();
pub unsafe fn init(argc: isize, argv: *const *const u8) {
let _guard = LOCK.lock();
ARGC = argc;
ARGV = argv;
}
pub unsafe fn cleanup() {
let _guard = LOCK.lock();
ARGC = 0;
ARGV = ptr::null();
}
pub fn args() -> Args {
Args { iter: clone().into_iter() }
}
fn clone() -> Vec<OsString> {
unsafe {
let _guard = LOCK.lock();
(0..ARGC)
.map(|i| {
let cstr = CStr::from_ptr(*ARGV.offset(i) as *const i8);
OsStringExt::from_vec(cstr.to_bytes().to_vec())
})
.collect()
}
}
}
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