Function barnacl_sys::crypto_stream_xsalsa20_xor

pub unsafe extern "C" fn crypto_stream_xsalsa20_xor(
    c: *mut u8, 
    m: *const u8, 
    mlen: c_ulonglong, 
    n: *const [u8; 24], 
    k: *const [u8; 32]
) -> c_int