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use std::io;
use sys;
pub const STRING_BUFFER_LENGTH: usize = 0x200;
pub fn convert_error(e: sys::Error) -> io::Error {
match e {
sys::Error::Sys(errno) => errno.into(),
_ => sys::Errno::EINVAL.into(),
}
}
macro_rules! impl_iterable {
(@impliter $name: ident($start:expr, $count:expr)) => {
impl ::bitmask::BitmaskTrait for $name {
type Array = [u8; (Self::COUNT + 7) / 8];
type Index = $name;
fn array_default() -> Self::Array { unsafe { ::std::mem::zeroed() } }
fn array_slice(array: &Self::Array) -> &[u8] { array }
fn array_slice_mut(array: &mut Self::Array) -> &mut [u8] { array }
fn index(index: Self::Index) -> usize { index as usize }
}
impl ::enum_iterator::IterableEnum for $name {
fn iter_next(v: usize) -> Option<(usize, Self)> {
if v < Self::COUNT {
unsafe {
Some((v + 1, ::std::mem::transmute(v as u16)))
}
} else {
None
}
}
fn iter() -> ::enum_iterator::EnumIterator<Self> {
::enum_iterator::EnumIterator::new($start)
}
}
impl $name {
pub const COUNT: usize = $count as usize;
pub fn iter() -> ::enum_iterator::EnumIterator<Self> {
::enum_iterator::IterableEnum::iter()
}
pub fn bitmask() -> ::bitmask::Bitmask<Self> {
Default::default()
}
}
impl From<$name> for u16 {
fn from(v: $name) -> Self {
v as _
}
}
};
(@implcode $name: ident($start:expr, $count:expr)) => {
impl $name {
pub fn from_code(code: u16) -> Result<Self, ::kinds::RangeError> {
use std::mem;
if code < Self::COUNT as u16 {
Ok(unsafe { mem::transmute(code) })
} else {
Err(Default::default())
}
}
}
#[cfg(feature = "unstable")]
impl TryFrom<u16> for $name {
type Error = kinds::RangeError;
fn try_from(code: u16) -> Result<Self, Self::Error> {
Self::from_code(code)
}
}
};
($name: ident($start:expr, $count:expr)) => {
impl_iterable! { @impliter $name($start, $count) }
impl_iterable! { @implcode $name($start, $count) }
};
(@nofromcode $name: ident($start:expr, $count:expr)) => {
impl_iterable! { @impliter $name($start, $count) }
};
}
macro_rules! ioctl_impl {
($(#[$attr:meta])* @get $f:ident = $ev:ident -> $ret:ty) => {
$(#[$attr])*
pub fn $f(&self) -> io::Result<$ret> {
unsafe {
let mut v = ::std::mem::uninitialized();
sys::$ev(self.0, &mut v)
.map(|_| v.into())
.map_err(::macros::convert_error)
}
}
};
($(#[$attr:meta])* @call $f:ident = $ev:ident) => {
$(#[$attr])*
pub fn $f(&self) -> io::Result<()> {
unsafe {
sys::$ev(self.0)
.map(drop)
.map_err(::macros::convert_error)
}
}
};
($(#[$attr:meta])* @get_buf $f:ident($ty:ty) = $ev:ident) => {
$(#[$attr])*
pub fn $f(&self, buffer: &mut [$ty]) -> io::Result<usize> {
unsafe {
sys::$ev(self.0, &mut *(buffer as *mut [$ty] as *mut [_]))
.map(|len| len as _)
.map_err(::macros::convert_error)
}
}
};
($(#[$attr:meta])* @get_str $f:ident, $fbuf:ident = $ev:ident) => {
ioctl_impl! {
$(#[$attr])*
@get_buf $fbuf(u8) = $ev
}
$(#[$attr])*
pub fn $f(&self) -> io::Result<Vec<u8>> {
let mut buf = vec![0; ::macros::STRING_BUFFER_LENGTH];
self.$fbuf(&mut buf[..]).map(move |len| {
buf.truncate(len as _);
buf
})
}
};
($(#[$attr:meta])* @set_str $f:ident = $ev:ident) => {
$(#[$attr])*
pub fn $f(&self, value: &::std::ffi::CStr) -> io::Result<()> {
unsafe {
sys::$ev(self.0, value.as_ptr())
.map(drop)
.map_err(::macros::convert_error)
}
}
};
($(#[$attr:meta])* @set $f:ident($in:ty) = $ev:ident) => {
$(#[$attr])*
pub fn $f(&self, value: $in) -> io::Result<()> {
unsafe {
sys::$ev(self.0, value as _)
.map(drop)
.map_err(::macros::convert_error)
}
}
};
($({ $($tt:tt)* })*) => {
$(
ioctl_impl! {$($tt)*}
)*
};
}
macro_rules! impl_bitmasks {
{ $kind:path, $event: expr, $name_mask:ident, $name_mask_set:ident, $name_bits:ident } => {
pub fn $name_mask(&self) -> io::Result<::bitmask::Bitmask<$kind>> {
let mut bitmask = ::bitmask::Bitmask::default();
self.event_mask_raw($event, &mut bitmask).map(|_| bitmask)
}
pub fn $name_mask_set(&self, bitmask: &::bitmask::Bitmask<$kind>) -> io::Result<()> {
self.set_event_mask_raw($event, bitmask)
}
pub fn $name_bits(&self) -> io::Result<::bitmask::Bitmask<$kind>> {
let mut bitmask = ::bitmask::Bitmask::default();
self.event_bits_raw($event, &mut bitmask).map(|_| bitmask)
}
};
}