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Diffstat (limited to '')
-rw-r--r-- | library/std/src/sys/hermit/args.rs | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/library/std/src/sys/hermit/args.rs b/library/std/src/sys/hermit/args.rs new file mode 100644 index 000000000..1c7e1dd8d --- /dev/null +++ b/library/std/src/sys/hermit/args.rs @@ -0,0 +1,94 @@ +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() + } + } +} |