65 lines
1.5 KiB
Rust
65 lines
1.5 KiB
Rust
use crate::ffi::{CStr, OsStr, OsString};
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use crate::marker::PhantomData;
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use crate::os::wasi::ffi::OsStrExt;
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use crate::vec;
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pub unsafe fn init(_argc: isize, _argv: *const *const u8) {}
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pub unsafe fn cleanup() {}
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pub struct Args {
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iter: vec::IntoIter<OsString>,
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_dont_send_or_sync_me: PhantomData<*mut ()>,
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}
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/// Returns the command line arguments
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pub fn args() -> Args {
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Args {
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iter: maybe_args().unwrap_or(Vec::new()).into_iter(),
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_dont_send_or_sync_me: PhantomData,
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}
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}
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fn maybe_args() -> Option<Vec<OsString>> {
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unsafe {
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let (argc, buf_size) = wasi::args_sizes_get().ok()?;
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let mut argv = Vec::with_capacity(argc);
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let mut buf = Vec::with_capacity(buf_size);
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wasi::args_get(argv.as_mut_ptr(), buf.as_mut_ptr()).ok()?;
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let mut ret = Vec::with_capacity(argc);
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for ptr in argv {
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let s = CStr::from_ptr(ptr.cast());
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ret.push(OsStr::from_bytes(s.to_bytes()).to_owned());
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}
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Some(ret)
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}
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}
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impl Args {
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pub fn inner_debug(&self) -> &[OsString] {
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self.iter.as_slice()
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}
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}
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impl Iterator for Args {
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type Item = OsString;
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fn next(&mut self) -> Option<OsString> {
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self.iter.next()
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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self.iter.size_hint()
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}
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}
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impl ExactSizeIterator for Args {
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fn len(&self) -> usize {
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self.iter.len()
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}
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}
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impl DoubleEndedIterator for Args {
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fn next_back(&mut self) -> Option<OsString> {
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self.iter.next_back()
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}
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}
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