26 lines
897 B
Rust
26 lines
897 B
Rust
// Copyright 2018 Developers of the Rand project.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Implementation for WASI
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use crate::Error;
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use core::{
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mem::MaybeUninit,
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num::{NonZeroU16, NonZeroU32},
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};
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use wasi::random_get;
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pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
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unsafe { random_get(dest.as_mut_ptr() as *mut u8, dest.len()) }.map_err(|e| {
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// The WASI errno will always be non-zero, but we check just in case.
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match NonZeroU16::new(e.raw()) {
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Some(r) => Error::from(NonZeroU32::from(r)),
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None => Error::ERRNO_NOT_POSITIVE,
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}
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})
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}
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