Charlie Barto (Nov 28 2022 at 11:11): Charlie Barto (Nov 28 2022 at 11:11):I'm looking at cap_std::fs_utf8 and seeing that it's calling from_utf8 on the supplied paths quite frequently, which is Ok(path.as_ref().as_std_path().to_path_buf()), This is dispite it only really needing a Path, not a PathBuf. Is there any particular reason for this or is fs_utf8 just not widely used?
It looks like maybe a real conversion might be required for arf_strings, but even they shouldn't have any additional data for valid UTF-8
Dan Gohman (Nov 28 2022 at 20:34):Good find! There isn't a particular reason for it; the original code used arf_strings, and we didn't notice this when arf_strings were made optional.
Charlie Barto (Nov 29 2022 at 02:46):oddly this issue was introduced after that
Charlie Barto (Nov 29 2022 at 02:48):oh, no, that's not true; it was introduced in the same commit
Charlie Barto (Nov 29 2022 at 02:52):actually, looking at the subsequent code I don't really see why they would need this allocation _either_, since afaict an arf_string of valid utf-8 that said valid utf-8
Dan Gohman (Nov 29 2022 at 17:03):An arf_string of an ill-formed string needs an allocation.
Dan Gohman (Nov 29 2022 at 17:03):I believe from_utf8 has returned a PathBuf since it was first introduced.
Dan Gohman (Dec 15 2022 at 22:41):I've now submitted https://github.com/bytecodealliance/cap-std/pull/285 which fixes this, for the non-arf-strings case.
Last updated: Dec 23 2024 at 12:05 UTC