use core::slice;

use crate::{
    error::ResultExt,
    platform::{types::*, Pal, Sys},
};

pub const GRND_NONBLOCK: c_uint = 1;
pub const GRND_RANDOM: c_uint = 2;

#[no_mangle]
pub unsafe extern "C" fn getrandom(buf: *mut c_void, buflen: size_t, flags: c_uint) -> ssize_t {
    Sys::getrandom(
        slice::from_raw_parts_mut(buf as *mut u8, buflen as usize),
        flags,
    )
    .map(|read| read as ssize_t)
    .or_minus_one_errno()
}