#![allow(
    clippy::missing_safety_doc,
    clippy::redundant_static_lifetimes,
    clippy::too_many_arguments,
    clippy::unreadable_literal,
    clippy::upper_case_acronyms,
    improper_ctypes,
    non_camel_case_types,
    non_snake_case,
    non_upper_case_globals,
    unused_imports
)]
#![cfg_attr(docsrs, feature(doc_auto_cfg))]

use std::convert::TryInto;
use std::ffi::c_void;
use std::os::raw::{c_char, c_int, c_uint, c_ulong};

#[allow(
    clippy::useless_transmute,
    clippy::derive_partial_eq_without_eq,
    dead_code
)]
mod generated {
    include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
}
pub use generated::*;

#[cfg(target_pointer_width = "64")]
pub type BN_ULONG = u64;
#[cfg(target_pointer_width = "32")]
pub type BN_ULONG = u32;

pub const fn ERR_PACK(l: c_int, f: c_int, r: c_int) -> c_ulong {
    ((l as c_ulong & 0x0FF) << 24) | ((f as c_ulong & 0xFFF) << 12) | (r as c_ulong & 0xFFF)
}

pub const fn ERR_GET_LIB(l: c_uint) -> c_int {
    ((l >> 24) & 0x0FF) as c_int
}

pub const fn ERR_GET_FUNC(l: c_uint) -> c_int {
    ((l >> 12) & 0xFFF) as c_int
}

pub const fn ERR_GET_REASON(l: c_uint) -> c_int {
    (l & 0xFFF) as c_int
}

pub fn init() {
    use std::ptr;
    use std::sync::Once;

    // explicitly initialize to work around https://github.com/openssl/openssl/issues/3505
    static INIT: Once = Once::new();

    let init_options = OPENSSL_INIT_LOAD_SSL_STRINGS;

    INIT.call_once(|| {
        assert_eq!(
            unsafe { OPENSSL_init_ssl(init_options.try_into().unwrap(), ptr::null_mut()) },
            1
        )
    });
}