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// Copyright (C) 2017 - Will Glozer. All rights reserved.

use std::fmt;
use errno::Errno;

#[macro_use(io, iow, ioc)]
extern crate ioctl_sys;

#[macro_use]
mod macros {
    #[cfg(target_env = "gnu")]
    #[macro_export]
    macro_rules! IOCTL {
        ($name:ident, $ty:expr, $nr:expr) => (
            const $name: std::os::raw::c_ulong = io!($ty, $nr) as std::os::raw::c_ulong;
        );
        ($name:ident, $ty:expr, $nr:expr, $arg:ty) => (
            const $name: std::os::raw::c_ulong = iow!($ty, $nr, std::mem::size_of::<$arg>()) as std::os::raw::c_ulong;
        );
    }

    #[cfg(target_env = "musl")]
    #[macro_export]
    macro_rules! IOCTL {
        ($name:ident, $ty:expr, $nr:expr) => (
            const $name: std::os::raw::c_int = io!($ty, $nr) as std::os::raw::c_int;
        );
        ($name:ident, $ty:expr, $nr:expr, $arg:ty) => (
            const $name: std::os::raw::c_int = iow!($ty, $nr, std::mem::size_of::<$arg>()) as std::os::raw::c_int;
        );
    }
}

pub mod map;
pub mod ffi;
pub mod sys;

#[derive(Debug)]
pub struct Error(Errno);

impl From<Errno> for Error {
    fn from(err: Errno) -> Self {
        Self(err)
    }
}

impl std::error::Error for Error {}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}