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use super::abi::usercalls::{alloc, raw::ByteBuffer};
use crate::ffi::OsString;
use crate::fmt;
use crate::slice;
use crate::sync::atomic::{AtomicUsize, Ordering};
use crate::sys::os_str::Buf;
use crate::sys_common::FromInner;
#[cfg_attr(test, linkage = "available_externally")]
#[export_name = "_ZN16__rust_internals3std3sys3sgx4args4ARGSE"]
static ARGS: AtomicUsize = AtomicUsize::new(0);
type ArgsStore = Vec<OsString>;
#[cfg_attr(test, allow(dead_code))]
pub unsafe fn init(argc: isize, argv: *const *const u8) {
if argc != 0 {
let args = unsafe { alloc::User::<[ByteBuffer]>::from_raw_parts(argv as _, argc as _) };
let args = args
.iter()
.map(|a| OsString::from_inner(Buf { inner: a.copy_user_buffer() }))
.collect::<ArgsStore>();
ARGS.store(Box::into_raw(Box::new(args)) as _, Ordering::Relaxed);
}
}
pub fn args() -> Args {
let args = unsafe { (ARGS.load(Ordering::Relaxed) as *const ArgsStore).as_ref() };
if let Some(args) = args { Args(args.iter()) } else { Args([].iter()) }
}
pub struct Args(slice::Iter<'static, OsString>);
impl fmt::Debug for Args {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.as_slice().fmt(f)
}
}
impl Iterator for Args {
type Item = OsString;
fn next(&mut self) -> Option<OsString> {
self.0.next().cloned()
}
fn size_hint(&self) -> (usize, Option<usize>) {
self.0.size_hint()
}
}
impl ExactSizeIterator for Args {
fn len(&self) -> usize {
self.0.len()
}
}
impl DoubleEndedIterator for Args {
fn next_back(&mut self) -> Option<OsString> {
self.0.next_back().cloned()
}
}
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