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use libc::*;

pub const ERR_TXT_MALLOCED: c_int = 0x01;
pub const ERR_TXT_STRING: c_int = 0x02;

pub const ERR_LIB_PEM: c_int = 9;

const_fn! {
    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_ulong) -> c_int {
        ((l >> 24) & 0x0FF) as c_int
    }

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

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

#[repr(C)]
pub struct ERR_STRING_DATA {
    pub error: c_ulong,
    pub string: *const c_char,
}

extern "C" {
    pub fn ERR_put_error(lib: c_int, func: c_int, reason: c_int, file: *const c_char, line: c_int);
    pub fn ERR_set_error_data(data: *mut c_char, flags: c_int);

    pub fn ERR_get_error() -> c_ulong;
    pub fn ERR_get_error_line_data(
        file: *mut *const c_char,
        line: *mut c_int,
        data: *mut *const c_char,
        flags: *mut c_int,
    ) -> c_ulong;
    pub fn ERR_peek_last_error() -> c_ulong;
    pub fn ERR_clear_error();
    pub fn ERR_lib_error_string(err: c_ulong) -> *const c_char;
    pub fn ERR_func_error_string(err: c_ulong) -> *const c_char;
    pub fn ERR_reason_error_string(err: c_ulong) -> *const c_char;
    #[cfg(ossl110)]
    pub fn ERR_load_strings(lib: c_int, str: *mut ERR_STRING_DATA) -> c_int;
    #[cfg(not(ossl110))]
    pub fn ERR_load_strings(lib: c_int, str: *mut ERR_STRING_DATA);
    #[cfg(not(ossl110))]
    pub fn ERR_load_crypto_strings();

    pub fn ERR_get_next_error_library() -> c_int;
}