Function fread 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn fread(
    ptr: *mut c_void,
    size: size_t,
    nitems: size_t,
    stream: *mut FILE,
) -> size_t

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/fread.html.

Read nitems of size size into ptr from stream