//! This module corresponds to `mach/message.h`.

use kern_return::kern_return_t;
use port::{mach_port_name_t, mach_port_t};
use vm_types::{integer_t, natural_t};

pub type mach_msg_timeout_t = natural_t;

pub type mach_msg_bits_t = ::libc::c_uint;
pub type mach_msg_id_t = integer_t;
pub type mach_msg_size_t = natural_t;

pub type mach_msg_copy_options_t = ::libc::c_uint;
pub type mach_msg_descriptor_type_t = ::libc::c_uint;
pub type mach_msg_type_name_t = ::libc::c_uint;

pub type mach_msg_trailer_type_t = ::libc::c_uint;
pub type mach_msg_trailer_size_t = ::libc::c_uint;

pub type mach_msg_option_t = integer_t;

pub type mach_msg_type_number_t = natural_t;
pub type mach_msg_type_size_t = natural_t;

pub type mach_msg_return_t = kern_return_t;

pub const MACH_MSG_TIMEOUT_NONE: mach_msg_timeout_t = 0;

pub const MACH_MSGH_BITS_ZERO: mach_msg_bits_t = 0x0000_0000;

pub const MACH_MSGH_BITS_REMOTE_MASK: mach_msg_bits_t = 0x0000_001f;
pub const MACH_MSGH_BITS_LOCAL_MASK: mach_msg_bits_t = 0x0000_1f00;
pub const MACH_MSGH_BITS_VOUCHER_MASK: mach_msg_bits_t = 0x001f_0000;

pub const MACH_MSGH_BITS_PORTS_MASK: mach_msg_bits_t =
    MACH_MSGH_BITS_REMOTE_MASK | MACH_MSGH_BITS_LOCAL_MASK | MACH_MSGH_BITS_VOUCHER_MASK;

pub const MACH_MSGH_BITS_COMPLEX: mach_msg_bits_t = 0x8000_0000;

pub const MACH_MSGH_BITS_USER: mach_msg_bits_t = 0x801f_1f1f;

#[allow(non_snake_case)]
pub fn MACH_MSGH_BITS(remote: mach_msg_bits_t, local: mach_msg_bits_t) -> mach_msg_bits_t {
    remote | (local << 8)
}

pub const MACH_MSG_TYPE_MOVE_RECEIVE: mach_msg_type_name_t = 16;
pub const MACH_MSG_TYPE_MOVE_SEND: mach_msg_type_name_t = 17;
pub const MACH_MSG_TYPE_MOVE_SEND_ONCE: mach_msg_type_name_t = 18;
pub const MACH_MSG_TYPE_COPY_SEND: mach_msg_type_name_t = 19;
pub const MACH_MSG_TYPE_MAKE_SEND: mach_msg_type_name_t = 20;
pub const MACH_MSG_TYPE_MAKE_SEND_ONCE: mach_msg_type_name_t = 21;
pub const MACH_MSG_TYPE_COPY_RECEIVE: mach_msg_type_name_t = 22;
pub const MACH_MSG_TYPE_DISPOSE_RECEIVE: mach_msg_type_name_t = 24;
pub const MACH_MSG_TYPE_DISPOSE_SEND: mach_msg_type_name_t = 25;
pub const MACH_MSG_TYPE_DISPOSE_SEND_ONCE: mach_msg_type_name_t = 26;

pub const MACH_MSG_PHYSICAL_COPY: mach_msg_copy_options_t = 0;
pub const MACH_MSG_VIRTUAL_COPY: mach_msg_copy_options_t = 1;
pub const MACH_MSG_ALLOCATE: mach_msg_copy_options_t = 2;

pub const MACH_MSG_PORT_DESCRIPTOR: mach_msg_descriptor_type_t = 0;
pub const MACH_MSG_OOL_DESCRIPTOR: mach_msg_descriptor_type_t = 1;
pub const MACH_MSG_OOL_PORTS_DESCRIPTOR: mach_msg_descriptor_type_t = 2;
pub const MACH_MSG_OOL_VOLATILE_DESCRIPTOR: mach_msg_descriptor_type_t = 3;

pub const MACH_MSG_OPTION_NONE: mach_msg_option_t = 0x0000_0000;

pub const MACH_SEND_MSG: mach_msg_option_t = 0x0000_0001;
pub const MACH_RCV_MSG: mach_msg_option_t = 0x0000_0002;

pub const MACH_RCV_LARGE: mach_msg_option_t = 0x0000_0004;
pub const MACH_RCV_LARGE_IDENTITY: mach_msg_option_t = 0x0000_0008;

pub const MACH_SEND_TIMEOUT: mach_msg_option_t = 0x0000_0010;
pub const MACH_SEND_INTERRUPT: mach_msg_option_t = 0x0000_0040;
pub const MACH_SEND_NOTIFY: mach_msg_option_t = 0x0000_0080;
pub const MACH_SEND_ALWAYS: mach_msg_option_t = 0x0001_0000;
pub const MACH_SEND_TRAILER: mach_msg_option_t = 0x0002_0000;
pub const MACH_SEND_NOIMPORTANCE: mach_msg_option_t = 0x0004_0000;
pub const MACH_SEND_NODENAP: mach_msg_option_t = MACH_SEND_NOIMPORTANCE;
pub const MACH_SEND_IMPORTANCE: mach_msg_option_t = 0x0008_0000;

pub const MACH_RCV_TIMEOUT: mach_msg_option_t = 0x0000_0100;
pub const MACH_RCV_NOTIFY: mach_msg_option_t = 0x0000_0000;
pub const MACH_RCV_INTERRUPT: mach_msg_option_t = 0x0000_0400;
pub const MACH_RCV_VOUCHER: mach_msg_option_t = 0x0000_0800;
pub const MACH_RCV_OVERWRITE: mach_msg_option_t = 0x0000_0000;

pub const MACH_MSG_SUCCESS: mach_msg_return_t = 0x0000_0000;

pub const MACH_MSG_MASK: mach_msg_return_t = 0x0000_3e00;
pub const MACH_MSG_IPC_SPACE: mach_msg_return_t = 0x0000_2000;
pub const MACH_MSG_VM_SPACE: mach_msg_return_t = 0x0000_1000;
pub const MACH_MSG_IPC_KERNEL: mach_msg_return_t = 0x0000_0800;
pub const MACH_MSG_VM_KERNEL: mach_msg_return_t = 0x0000_0400;

pub const MACH_SEND_IN_PROGRESS: mach_msg_return_t = 0x1000_0001;
pub const MACH_SEND_INVALID_DATA: mach_msg_return_t = 0x1000_0002;
pub const MACH_SEND_INVALID_DEST: mach_msg_return_t = 0x1000_0003;
pub const MACH_SEND_TIMED_OUT: mach_msg_return_t = 0x1000_0004;
pub const MACH_SEND_INVALID_VOUCHER: mach_msg_return_t = 0x1000_0005;
pub const MACH_SEND_INTERRUPTED: mach_msg_return_t = 0x1000_0007;
pub const MACH_SEND_MSG_TOO_SMALL: mach_msg_return_t = 0x1000_0008;
pub const MACH_SEND_INVALID_REPLY: mach_msg_return_t = 0x1000_0009;
pub const MACH_SEND_INVALID_RIGHT: mach_msg_return_t = 0x1000_000a;
pub const MACH_SEND_INVALID_NOTIFY: mach_msg_return_t = 0x1000_000b;
pub const MACH_SEND_INVALID_MEMORY: mach_msg_return_t = 0x1000_000c;
pub const MACH_SEND_NO_BUFFER: mach_msg_return_t = 0x1000_000d;
pub const MACH_SEND_TOO_LARGE: mach_msg_return_t = 0x1000_000e;
pub const MACH_SEND_INVALID_TYPE: mach_msg_return_t = 0x1000_000f;
pub const MACH_SEND_INVALID_HEADER: mach_msg_return_t = 0x1000_0010;
pub const MACH_SEND_INVALID_TRAILER: mach_msg_return_t = 0x1000_0011;
pub const MACH_SEND_INVALID_RT_OOL_SIZE: mach_msg_return_t = 0x1000_0015;

pub const MACH_RCV_IN_PROGRESS: mach_msg_return_t = 0x1000_4001;
pub const MACH_RCV_INVALID_NAME: mach_msg_return_t = 0x1000_4002;
pub const MACH_RCV_TIMED_OUT: mach_msg_return_t = 0x1000_4003;
pub const MACH_RCV_TOO_LARGE: mach_msg_return_t = 0x1000_4004;
pub const MACH_RCV_INTERRUPTED: mach_msg_return_t = 0x1000_4005;
pub const MACH_RCV_PORT_CHANGED: mach_msg_return_t = 0x1000_4006;
pub const MACH_RCV_INVALID_NOTIFY: mach_msg_return_t = 0x1000_4007;
pub const MACH_RCV_INVALID_DATA: mach_msg_return_t = 0x1000_4008;
pub const MACH_RCV_PORT_DIED: mach_msg_return_t = 0x1000_4009;
pub const MACH_RCV_IN_SET: mach_msg_return_t = 0x1000_400a;
pub const MACH_RCV_HEADER_ERROR: mach_msg_return_t = 0x1000_400b;
pub const MACH_RCV_BODY_ERROR: mach_msg_return_t = 0x1000_400c;
pub const MACH_RCV_INVALID_TYPE: mach_msg_return_t = 0x1000_400d;
pub const MACH_RCV_SCATTER_SMALL: mach_msg_return_t = 0x1000_400e;
pub const MACH_RCV_INVALID_TRAILER: mach_msg_return_t = 0x1000_400f;
pub const MACH_RCV_IN_PROGRESS_TIMED: mach_msg_return_t = 0x1000_4011;

#[repr(C)]
#[derive(Copy, Clone, Debug, Default, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_header_t {
    pub msgh_bits: mach_msg_bits_t,
    pub msgh_size: mach_msg_size_t,
    pub msgh_remote_port: mach_port_t,
    pub msgh_local_port: mach_port_t,
    pub msgh_voucher_port: mach_port_name_t,
    pub msgh_id: mach_msg_id_t,
}

#[repr(C)]
#[derive(Copy, Clone, Debug, Default, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_body_t {
    pub msgh_descriptor_count: mach_msg_size_t,
}

#[repr(C)]
#[derive(Copy, Clone, Debug, Default, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_base_t {
    pub header: mach_msg_header_t,
    pub body: mach_msg_body_t,
}

pub const MACH_MSG_TRAILER_FORMAT_0: mach_msg_trailer_type_t = 0;

#[repr(C)]
#[derive(Copy, Clone, Debug, Default, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_trailer_t {
    pub msgh_trailer_type: mach_msg_trailer_type_t,
    pub msgh_trailer_size: mach_msg_trailer_size_t,
}

#[repr(C)]
#[derive(Copy, Clone, Debug, Default, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_port_descriptor_t {
    pub name: mach_port_t,
    pub pad1: mach_msg_size_t,
    pub pad2: u16,
    pub disposition: u8, // mach_msg_type_name_t bitfield
    pub type_: u8,       // mach_msg_descriptor_type_t bitfield
}

impl mach_msg_port_descriptor_t {
    pub fn new(name: mach_port_t, disposition: mach_msg_type_name_t) -> Self {
        Self {
            name,
            pad1: 0,
            pad2: 0,
            disposition: disposition as u8,
            type_: MACH_MSG_PORT_DESCRIPTOR as u8,
        }
    }
}

#[repr(C)]
#[derive(Copy, Clone, Debug, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_ool_descriptor_t {
    pub address: *mut ::libc::c_void,
    #[cfg(not(target_pointer_width = "64"))]
    pub size: mach_msg_size_t,
    pub deallocate: u8, // boolean_t bitfield
    pub copy: u8,       // mach_msg_copy_options_t bitfield
    pub pad1: u8,
    pub type_: u8, // mach_msg_descriptor_type_t bitfield
    #[cfg(target_pointer_width = "64")]
    pub size: mach_msg_size_t,
}

impl mach_msg_ool_descriptor_t {
    pub fn new(
        address: *mut ::libc::c_void,
        deallocate: bool,
        copy: mach_msg_copy_options_t,
        size: u32,
    ) -> Self {
        Self {
            address,
            deallocate: if deallocate { 1 } else { 0 },
            copy: copy as u8,
            pad1: 0,
            type_: MACH_MSG_OOL_DESCRIPTOR as u8,
            size,
        }
    }
}

#[repr(C)]
#[derive(Copy, Clone, Debug, Hash, PartialOrd, PartialEq, Eq, Ord)]
pub struct mach_msg_ool_ports_descriptor_t {
    pub address: *mut ::libc::c_void,
    #[cfg(not(target_pointer_width = "64"))]
    pub count: mach_msg_size_t,
    pub deallocate: u8,  // boolean_t bitfield
    pub copy: u8,        // mach_msg_copy_options_t bitfield
    pub disposition: u8, // mach_msg_type_name_t bitfield
    pub type_: u8,       // mach_msg_descriptor_type_t bitfield
    #[cfg(target_pointer_width = "64")]
    pub count: mach_msg_size_t,
}

extern "C" {
    pub fn mach_msg(
        msg: *mut mach_msg_header_t,
        option: mach_msg_option_t,
        send_size: mach_msg_size_t,
        recv_size: mach_msg_size_t,
        recv_name: mach_port_name_t,
        timeout: mach_msg_timeout_t,
        notify: mach_port_name_t,
    ) -> mach_msg_return_t;

    // from mach/mach.h
    pub fn mach_msg_send(msg: *mut mach_msg_header_t) -> mach_msg_return_t;
    pub fn mach_msg_destroy(msg: *mut mach_msg_header_t);
}
