Function libsodium_sys::crypto_aead_chacha20poly1305_decrypt

pub unsafe extern fn crypto_aead_chacha20poly1305_decrypt(m: *mut u8,
                                                          mlen: *mut c_ulonglong,
                                                          nsec: *mut [u8; 0],
                                                          c: *const u8,
                                                          clen: c_ulonglong,
                                                          ad: *const u8,
                                                          adlen: c_ulonglong,
                                                          npub: *const [u8; 8],
                                                          k: *const [u8; 32])
                                                          -> c_int