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//! Implementation for iOS, tvOS, and watchOS where `getentropy` is unavailable.
use crate::Error;
use core::{ffi::c_void, mem::MaybeUninit};
pub use crate::util::{inner_u32, inner_u64};
pub fn fill_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
let dst_ptr = dest.as_mut_ptr().cast::<c_void>();
let ret = unsafe { libc::CCRandomGenerateBytes(dst_ptr, dest.len()) };
if ret == libc::kCCSuccess {
Ok(())
} else {
Err(Error::IOS_RANDOM_GEN)
}
}
impl Error {
/// Call to `CCRandomGenerateBytes` failed.
pub(crate) const IOS_RANDOM_GEN: Error = Self::new_internal(10);
}