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pub const NRBITS: u32 = 8;
pub const TYPEBITS: u32 = 8;
pub const SIZEBITS: u32 = 14;
pub const DIRBITS: u32 = 2;
pub const NONE: u32 = 0;
pub const WRITE: u32 = 1;
pub const READ: u32 = 2;
pub const NRMASK: u32 = (1 << NRBITS) - 1;
pub const TYPEMASK: u32 = (1 << TYPEBITS) - 1;
pub const SIZEMASK: u32 = (1 << SIZEBITS) - 1;
pub const DIRMASK: u32 = (1 << DIRBITS) - 1;
pub const NRSHIFT: u32 = 0;
pub const TYPESHIFT: u32 = NRSHIFT + NRBITS;
pub const SIZESHIFT: u32 = TYPESHIFT + TYPEBITS;
pub const DIRSHIFT: u32 = SIZESHIFT + SIZEBITS;
#[macro_export]
macro_rules! ioc {
($dr:expr, $ty:expr, $nr:expr, $sz:expr) => {
(($dr as u32) << $crate::DIRSHIFT) |
(($ty as u32) << $crate::TYPESHIFT) |
(($nr as u32) << $crate::NRSHIFT) |
(($sz as u32) << $crate::SIZESHIFT)
}
}
#[macro_export]
macro_rules! io {
($ty:expr, $nr:expr) => {
ioc!($crate::NONE, $ty, $nr, 0)
}
}
#[macro_export]
macro_rules! ior {
($ty:expr, $nr:expr, $sz:expr) => {
ioc!($crate::READ, $ty, $nr, $sz)
}
}
#[macro_export]
macro_rules! iow {
($ty:expr, $nr:expr, $sz:expr) => {
ioc!($crate::WRITE, $ty, $nr, $sz)
}
}
#[macro_export]
macro_rules! iowr {
($ty:expr, $nr:expr, $sz:expr) => {
ioc!($crate::READ | $crate::WRITE, $ty, $nr, $sz)
}
}
#[macro_export]
macro_rules! ioc_dir {
($n:expr) => { ($n >> $crate::DIRSHIFT) & $crate::DIRMASK }
}
#[macro_export]
macro_rules! ioc_type {
($n:expr) => { ($n >> $crate::TYPESHIFT) & $crate::TYPEMASK }
}
#[macro_export]
macro_rules! ioc_nr {
($n:expr) => { ($n >> $crate::NRSHIFT) & $crate::NRMASK }
}
#[macro_export]
macro_rules! ioc_size {
($n:expr) => { ($n >> $crate::SIZESHIFT) & $crate::SIZEMASK }
}