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Add the ability to safely read into ReadBuf #3509

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notgull opened this issue Dec 30, 2023 · 2 comments · May be fixed by #3515
Open

Add the ability to safely read into ReadBuf #3509

notgull opened this issue Dec 30, 2023 · 2 comments · May be fixed by #3515
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C-feature Category: feature. This is adding a new feature.

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@notgull
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notgull commented Dec 30, 2023

Is your feature request related to a problem? Please describe.
It is impossible to write an implementation of hyper::rt::Read because ReadBufCursor cannot be written to safely.

Describe the solution you'd like
Have a method that initializes the read buffer by zeroing it and then returning an &mut [u8] that can be filled safely. E.g. this.

Describe alternatives you've considered
N/A

@notgull notgull added the C-feature Category: feature. This is adding a new feature. label Dec 30, 2023
@seanmonstar
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Yea, I purposefully stuck with the smallest API possible, so that an overly eager method wouldn't restrict it's internal design. I'm happy to have proposals for new methods to add.

You're specifically asking for a way to access the slice as &mut [u8], instead of the &mut [MaybeUninit<u8>], right?

@notgull
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notgull commented Jan 1, 2024

Yes, that would be best. See my implementation where I have to use unsafe code to read into the buffer. If I could pass a &mut [u8] to the underlying reader I would be able to mark this crate as forbid(unsafe_code).

notgull added a commit to forkgull/hyper that referenced this issue Jan 5, 2024
@notgull notgull linked a pull request Jan 5, 2024 that will close this issue
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Labels
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