use crate::off_t;
use crate::prelude::*;

pub type c_char = i8;
pub type wchar_t = i32;
pub type nlink_t = u64;
pub type blksize_t = c_long;
pub type __u64 = c_ulonglong;

s! {
    pub struct stat {
        pub st_dev: crate::dev_t,
        pub st_ino: crate::ino_t,
        pub st_nlink: crate::nlink_t,
        pub st_mode: crate::mode_t,
        pub st_uid: crate::uid_t,
        pub st_gid: crate::gid_t,
        __pad0: c_int,
        pub st_rdev: crate::dev_t,
        pub st_size: off_t,
        pub st_blksize: crate::blksize_t,
        pub st_blocks: crate::blkcnt_t,
        pub st_atime: crate::time_t,
        pub st_atime_nsec: c_long,
        pub st_mtime: crate::time_t,
        pub st_mtime_nsec: c_long,
        pub st_ctime: crate::time_t,
        pub st_ctime_nsec: c_long,
        __unused: [c_long; 3],
    }

    pub struct stat64 {
        pub st_dev: crate::dev_t,
        pub st_ino: crate::ino64_t,
        pub st_nlink: crate::nlink_t,
        pub st_mode: crate::mode_t,
        pub st_uid: crate::uid_t,
        pub st_gid: crate::gid_t,
        __pad0: c_int,
        pub st_rdev: crate::dev_t,
        pub st_size: off_t,
        pub st_blksize: crate::blksize_t,
        pub st_blocks: crate::blkcnt64_t,
        pub st_atime: crate::time_t,
        pub st_atime_nsec: c_long,
        pub st_mtime: crate::time_t,
        pub st_mtime_nsec: c_long,
        pub st_ctime: crate::time_t,
        pub st_ctime_nsec: c_long,
        __reserved: [c_long; 3],
    }

    pub struct mcontext_t {
        __private: [u64; 32],
    }

    pub struct ipc_perm {
        pub __ipc_perm_key: crate::key_t,
        pub uid: crate::uid_t,
        pub gid: crate::gid_t,
        pub cuid: crate::uid_t,
        pub cgid: crate::gid_t,
        pub mode: crate::mode_t,
        pub __seq: c_int,
        __unused1: c_long,
        __unused2: c_long,
    }
}

s_no_extra_traits! {
    pub struct ucontext_t {
        pub uc_flags: c_ulong,
        pub uc_link: *mut ucontext_t,
        pub uc_stack: crate::stack_t,
        pub uc_mcontext: mcontext_t,
        pub uc_sigmask: crate::sigset_t,
        __private: [u8; 512],
    }
}

cfg_if! {
    if #[cfg(feature = "extra_traits")] {
        impl PartialEq for ucontext_t {
            fn eq(&self, other: &ucontext_t) -> bool {
                self.uc_flags == other.uc_flags
                    && self.uc_link == other.uc_link
                    && self.uc_stack == other.uc_stack
                    && self.uc_mcontext == other.uc_mcontext
                    && self.uc_sigmask == other.uc_sigmask
                    && self
                        .__private
                        .iter()
                        .zip(other.__private.iter())
                        .all(|(a, b)| a == b)
            }
        }
        impl Eq for ucontext_t {}
        impl fmt::Debug for ucontext_t {
            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
                f.debug_struct("ucontext_t")
                    .field("uc_flags", &self.uc_flags)
                    .field("uc_link", &self.uc_link)
                    .field("uc_stack", &self.uc_stack)
                    .field("uc_mcontext", &self.uc_mcontext)
                    .field("uc_sigmask", &self.uc_sigmask)
                    // FIXME: .field("__private", &self.__private)
                    .finish()
            }
        }
        impl hash::Hash for ucontext_t {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.uc_flags.hash(state);
                self.uc_link.hash(state);
                self.uc_stack.hash(state);
                self.uc_mcontext.hash(state);
                self.uc_sigmask.hash(state);
                self.__private.hash(state);
            }
        }
    }
}

// offsets in user_regs_structs, from sys/reg.h
pub const R15: c_int = 0;
pub const R14: c_int = 1;
pub const R13: c_int = 2;
pub const R12: c_int = 3;
pub const RBP: c_int = 4;
pub const RBX: c_int = 5;
pub const R11: c_int = 6;
pub const R10: c_int = 7;
pub const R9: c_int = 8;
pub const R8: c_int = 9;
pub const RAX: c_int = 10;
pub const RCX: c_int = 11;
pub const RDX: c_int = 12;
pub const RSI: c_int = 13;
pub const RDI: c_int = 14;
pub const ORIG_RAX: c_int = 15;
pub const RIP: c_int = 16;
pub const CS: c_int = 17;
pub const EFLAGS: c_int = 18;
pub const RSP: c_int = 19;
pub const SS: c_int = 20;
pub const FS_BASE: c_int = 21;
pub const GS_BASE: c_int = 22;
pub const DS: c_int = 23;
pub const ES: c_int = 24;
pub const FS: c_int = 25;
pub const GS: c_int = 26;

pub const MAP_32BIT: c_int = 0x0040;

pub const SIGSTKSZ: size_t = 8192;
pub const MINSIGSTKSZ: size_t = 2048;