2020-08-18 16:46:07 +00:00
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#[doc(hidden)]
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pub use core::convert::Into;
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#[doc(hidden)]
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pub use core::fmt;
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#[doc(hidden)]
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pub use core::mem::size_of;
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use num_traits::Num;
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum Direction {
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Left = 0,
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Up = 1,
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Right = 2,
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Bottom = 3,
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}
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impl Direction {
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pub fn from_int(val: usize) -> Option<Direction> {
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match val {
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0 => { Some(Direction::Left) }
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1 => { Some(Direction::Up) }
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2 => { Some(Direction::Right) }
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3 => { Some(Direction::Bottom) }
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_ => { None }
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}
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}
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}
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#[derive(Debug, Clone, Copy)]
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pub struct Rect<T: Num + Copy = isize> {
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pub left: T,
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pub top: T,
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pub right: T,
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pub bottom: T,
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}
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impl<S: Num + Copy> Rect<S> {
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pub fn new<T: Num + Copy>(left: T, top: T, right: T, bottom: T) -> Rect<T> {
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Rect {
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left,
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top,
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right,
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bottom,
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}
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}
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pub fn new_size<T: Num + Copy>(x: T, y: T, width: T, height: T) -> Rect<T> {
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Rect {
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left: x,
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top: y,
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right: x.add(width),
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bottom: y.add(height),
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}
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}
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2020-08-19 19:11:32 +00:00
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pub fn from(rect: crate::ggez::graphics::Rect) -> Rect<f32> {
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2020-08-18 16:46:07 +00:00
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Rect {
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left: rect.x,
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top: rect.y,
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right: (rect.x + rect.w),
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bottom: (rect.y + rect.h),
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}
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}
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}
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#[macro_export]
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macro_rules! str {
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() => {
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String::new()
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};
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($x:expr) => {
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ToString::to_string(&$x)
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};
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}
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// extended version of https://github.com/dzamlo/rust-bitfield
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#[macro_export(local_inner_macros)]
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macro_rules! bitfield_fields {
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, _, $setter:ident: $msb:expr,
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$lsb:expr, $count:expr) => {
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$(#[$attribute])*
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#[allow(unknown_lints)]
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#[allow(eq_op)]
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$($vis)* fn $setter(&mut self, index: usize, value: $from) {
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use crate::common::BitRange;
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__bitfield_debug_assert!(index < $count);
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let width = $msb - $lsb + 1;
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let lsb = $lsb + index*width;
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let msb = lsb + width - 1;
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self.set_bit_range(msb, lsb, crate::common::Into::<$t>::into(value));
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, _, $setter:ident: $msb:expr,
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$lsb:expr) => {
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$(#[$attribute])*
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$($vis)* fn $setter(&mut self, value: $from) {
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use crate::common::BitRange;
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self.set_bit_range($msb, $lsb, crate::common::Into::<$t>::into(value));
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, _, $setter:ident: $bit:expr) => {
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$(#[$attribute])*
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$($vis)* fn $setter(&mut self, value: bool) {
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use crate::common::Bit;
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self.set_bit($bit, value);
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, $getter:ident, _: $msb:expr,
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$lsb:expr, $count:expr) => {
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$(#[$attribute])*
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#[allow(unknown_lints)]
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#[allow(eq_op)]
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$($vis)* fn $getter(&self, index: usize) -> $into {
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use crate::common::BitRange;
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__bitfield_debug_assert!(index < $count);
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let width = $msb - $lsb + 1;
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let lsb = $lsb + index*width;
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let msb = lsb + width - 1;
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let raw_value: $t = self.bit_range(msb, lsb);
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crate::common::Into::into(raw_value)
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, $getter:ident, _: $msb:expr,
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$lsb:expr) => {
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$(#[$attribute])*
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$($vis)* fn $getter(&self) -> $into {
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use crate::common::BitRange;
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let raw_value: $t = self.bit_range($msb, $lsb);
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crate::common::Into::into(raw_value)
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, $getter:ident, _: $bit:expr) => {
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$(#[$attribute])*
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$($vis)* fn $getter(&self) -> bool {
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use crate::common::Bit;
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self.bit($bit)
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}
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paste::paste! {
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$($vis)* fn [<only_ $getter>](&self) -> bool {
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use crate::common::Bit;
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self.bit_only($bit)
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}
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}
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};
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(@field $(#[$attribute:meta])* ($($vis:tt)*) $t:ty, $from:ty, $into:ty, $getter:ident, $setter:ident:
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$($exprs:expr),*) => {
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bitfield_fields!(@field $(#[$attribute])* ($($vis)*) $t, $from, $into, $getter, _: $($exprs),*);
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bitfield_fields!(@field $(#[$attribute])* ($($vis)*) $t, $from, $into, _, $setter: $($exprs),*);
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};
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($t:ty;) => {};
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($default_ty:ty; pub $($rest:tt)*) => {
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bitfield_fields!{$default_ty; () pub $($rest)*}
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};
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($default_ty:ty; #[$attribute:meta] $($rest:tt)*) => {
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bitfield_fields!{$default_ty; (#[$attribute]) $($rest)*}
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};
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($default_ty:ty; ($(#[$attributes:meta])*) #[$attribute:meta] $($rest:tt)*) => {
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bitfield_fields!{$default_ty; ($(#[$attributes])* #[$attribute]) $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub $t:ty, from into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $t, $into, $into, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub $t:ty, into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $t, $t, $into, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub $t:ty, $getter:tt, $setter:tt: $($exprs:expr),*;
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$($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $t, $t, $t, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub from into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $default_ty, $into, $into, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $default_ty, $default_ty, $into, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) pub $getter:tt, $setter:tt: $($exprs:expr),*;
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$($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* (pub) $default_ty, $default_ty, $default_ty, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) $t:ty, from into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $t, $into, $into, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) $t:ty, into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $t, $t, $into, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) $t:ty, $getter:tt, $setter:tt: $($exprs:expr),*;
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$($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $t, $t, $t, $getter, $setter: $($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) from into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $default_ty, $into, $into, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) into $into:ty, $getter:tt, $setter:tt:
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$($exprs:expr),*; $($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $default_ty, $default_ty, $into, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; ($(#[$attribute:meta])*) $getter:tt, $setter:tt: $($exprs:expr),*;
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$($rest:tt)*) => {
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bitfield_fields!{@field $(#[$attribute])* () $default_ty, $default_ty, $default_ty, $getter, $setter:
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$($exprs),*}
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($previous_default_ty:ty; $default_ty:ty; $($rest:tt)*) => {
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bitfield_fields!{$default_ty; $($rest)*}
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};
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($default_ty:ty; $($rest:tt)*) => {
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bitfield_fields!{$default_ty; () $($rest)*}
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};
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($($rest:tt)*) => {
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bitfield_fields!{SET_A_DEFAULT_TYPE_OR_SPECIFY_THE_TYPE_FOR_EACH_FIELDS; $($rest)*}
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}
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}
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/// Generates a `fmt::Debug` implementation.
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///
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/// This macros must be called from a `impl Debug for ...` block. It will generate the `fmt` method.
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///
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/// In most of the case, you will not directly call this macros, but use `bitfield`.
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///
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/// The syntax is `struct TheNameOfTheStruct` followed by the syntax of `bitfield_fields`.
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///
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/// The write-only fields are ignored.
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///
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/// # Example
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///
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/// ```rust
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/// # #[macro_use] extern crate bitfield;
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/// struct FooBar(u32);
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/// bitfield_bitrange!{struct FooBar(u32)}
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/// impl FooBar{
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/// bitfield_fields!{
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/// u32;
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/// field1, _: 7, 0;
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/// field2, _: 31, 24;
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/// }
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/// }
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///
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/// impl std::fmt::Debug for FooBar {
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/// bitfield_debug!{
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/// struct FooBar;
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/// field1, _: 7, 0;
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/// field2, _: 31, 24;
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/// }
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/// }
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///
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/// fn main() {
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/// let foobar = FooBar(0x11223344);
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/// println!("{:?}", foobar);
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/// }
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/// ```
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#[macro_export(local_inner_macros)]
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macro_rules! bitfield_debug {
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(struct $name:ident; $($rest:tt)*) => {
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|
|
fn fmt(&self, f: &mut crate::common::fmt::Formatter) -> crate::common::fmt::Result {
|
|
|
|
|
let mut debug_struct = f.debug_struct(__bitfield_stringify!($name));
|
|
|
|
|
debug_struct.field(".0", &self.0);
|
|
|
|
|
bitfield_debug!{debug_struct, self, $($rest)*}
|
|
|
|
|
debug_struct.finish()
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, #[$attribute:meta] $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, pub $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, _, $setter:tt: $($exprs:expr),*; $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, $type:ty; $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, $getter:ident, $setter:tt: $msb:expr, $lsb:expr, $count:expr;
|
|
|
|
|
$($rest:tt)*) => {
|
|
|
|
|
let mut array = [$self.$getter(0); $count];
|
|
|
|
|
for (i, e) in (&mut array).into_iter().enumerate() {
|
|
|
|
|
*e = $self.$getter(i);
|
|
|
|
|
}
|
|
|
|
|
$debug_struct.field(__bitfield_stringify!($getter), &array);
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, $getter:ident, $setter:tt: $($exprs:expr),*; $($rest:tt)*)
|
|
|
|
|
=> {
|
|
|
|
|
$debug_struct.field(__bitfield_stringify!($getter), &$self.$getter());
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, from into $into:ty, $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, into $into:ty, $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, $type:ty, $($rest:tt)*) => {
|
|
|
|
|
bitfield_debug!{$debug_struct, $self, $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($debug_struct:ident, $self:ident, ) => {};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Implements `BitRange` for a tuple struct (or "newtype").
|
|
|
|
|
///
|
|
|
|
|
/// This macro will generate an implementation of the `BitRange` trait for an existing single
|
|
|
|
|
/// element tuple struct.
|
|
|
|
|
///
|
|
|
|
|
/// The syntax is more or less the same as declaring a "newtype", **without** the attributes,
|
|
|
|
|
/// documentation comments and pub keyword.
|
|
|
|
|
///
|
|
|
|
|
/// The difference with a normal "newtype" is the type in parentheses. If the type is `[t]` (where
|
|
|
|
|
/// `t` is any of the unsigned integer type), the "newtype" will be generic and implement
|
|
|
|
|
/// `BitRange` for `T: AsMut<[t]> + AsRef<[t]>` (for example a slice, an array or a `Vec`). You can
|
|
|
|
|
/// also use `MSB0 [t]`. The difference will be the positions of the bit. You can use the
|
|
|
|
|
/// `bits_positions` example to see where each bits is. If the type is neither of this two, the
|
|
|
|
|
/// "newtype" will wrap a value of the specified type and implements `BitRange` the same ways as
|
|
|
|
|
/// the wrapped type.
|
|
|
|
|
///
|
|
|
|
|
/// # Examples
|
|
|
|
|
///
|
|
|
|
|
/// ```rust
|
|
|
|
|
/// # #[macro_use] extern crate bitfield;
|
|
|
|
|
/// # fn main() {}
|
|
|
|
|
/// struct BitField1(u32);
|
|
|
|
|
/// bitfield_bitrange!{struct BitField1(u32)}
|
|
|
|
|
///
|
|
|
|
|
/// struct BitField2<T>(T);
|
|
|
|
|
/// bitfield_bitrange!{struct BitField2([u8])}
|
|
|
|
|
///
|
|
|
|
|
/// struct BitField3<T>(T);
|
|
|
|
|
/// bitfield_bitrange!{struct BitField3(MSB0 [u8])}
|
|
|
|
|
/// ```
|
|
|
|
|
///
|
|
|
|
|
#[macro_export(local_inner_macros)]
|
|
|
|
|
macro_rules! bitfield_bitrange {
|
|
|
|
|
(@impl_bitrange_slice $name:ident, $slice_ty:ty, $bitrange_ty:ty) => {
|
|
|
|
|
impl<T: AsMut<[$slice_ty]> + AsRef<[$slice_ty]>> crate::common::BitRange<$bitrange_ty>
|
|
|
|
|
for $name<T> {
|
|
|
|
|
fn bit_range(&self, msb: usize, lsb: usize) -> $bitrange_ty {
|
|
|
|
|
let bit_len = crate::common::size_of::<$slice_ty>()*8;
|
|
|
|
|
let value_bit_len = crate::common::size_of::<$bitrange_ty>()*8;
|
|
|
|
|
let mut value = 0;
|
|
|
|
|
for i in (lsb..=msb).rev() {
|
|
|
|
|
value <<= 1;
|
|
|
|
|
value |= ((self.0.as_ref()[i/bit_len] >> (i%bit_len)) & 1) as $bitrange_ty;
|
|
|
|
|
}
|
|
|
|
|
value << (value_bit_len - (msb - lsb + 1)) >> (value_bit_len - (msb - lsb + 1))
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn set_bit_range(&mut self, msb: usize, lsb: usize, value: $bitrange_ty) {
|
|
|
|
|
let bit_len = crate::common::size_of::<$slice_ty>()*8;
|
|
|
|
|
let mut value = value;
|
|
|
|
|
for i in lsb..=msb {
|
|
|
|
|
self.0.as_mut()[i/bit_len] &= !(1 << (i%bit_len));
|
|
|
|
|
self.0.as_mut()[i/bit_len] |= (value & 1) as $slice_ty << (i%bit_len);
|
|
|
|
|
value >>= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
(@impl_bitrange_slice_msb0 $name:ident, $slice_ty:ty, $bitrange_ty:ty) => {
|
|
|
|
|
impl<T: AsMut<[$slice_ty]> + AsRef<[$slice_ty]>> crate::common::BitRange<$bitrange_ty>
|
|
|
|
|
for $name<T> {
|
|
|
|
|
fn bit_range(&self, msb: usize, lsb: usize) -> $bitrange_ty {
|
|
|
|
|
let bit_len = crate::common::size_of::<$slice_ty>()*8;
|
|
|
|
|
let value_bit_len = crate::common::size_of::<$bitrange_ty>()*8;
|
|
|
|
|
let mut value = 0;
|
|
|
|
|
for i in lsb..=msb {
|
|
|
|
|
value <<= 1;
|
|
|
|
|
value |= ((self.0.as_ref()[i/bit_len] >> (bit_len - i%bit_len - 1)) & 1)
|
|
|
|
|
as $bitrange_ty;
|
|
|
|
|
}
|
|
|
|
|
value << (value_bit_len - (msb - lsb + 1)) >> (value_bit_len - (msb - lsb + 1))
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn set_bit_range(&mut self, msb: usize, lsb: usize, value: $bitrange_ty) {
|
|
|
|
|
let bit_len = crate::common::size_of::<$slice_ty>()*8;
|
|
|
|
|
let mut value = value;
|
|
|
|
|
for i in (lsb..=msb).rev() {
|
|
|
|
|
self.0.as_mut()[i/bit_len] &= !(1 << (bit_len - i%bit_len - 1));
|
|
|
|
|
self.0.as_mut()[i/bit_len] |= (value & 1) as $slice_ty
|
|
|
|
|
<< (bit_len - i%bit_len - 1);
|
|
|
|
|
value >>= 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
(struct $name:ident([$t:ty])) => {
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, u8);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, u16);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, u32);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, u64);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, u128);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, i8);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, i16);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, i32);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, i64);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice $name, $t, i128);
|
|
|
|
|
};
|
|
|
|
|
(struct $name:ident(MSB0 [$t:ty])) => {
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, u8);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, u16);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, u32);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, u64);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, u128);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, i8);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, i16);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, i32);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, i64);
|
|
|
|
|
bitfield_bitrange!(@impl_bitrange_slice_msb0 $name, $t, i128);
|
|
|
|
|
};
|
|
|
|
|
(struct $name:ident($t:ty)) => {
|
|
|
|
|
impl<T> crate::common::BitRange<T> for $name where $t: crate::common::BitRange<T> {
|
|
|
|
|
fn get(&self) -> T {
|
|
|
|
|
self.0.get()
|
|
|
|
|
}
|
|
|
|
|
fn bit_range(&self, msb: usize, lsb: usize) -> T {
|
|
|
|
|
self.0.bit_range(msb, lsb)
|
|
|
|
|
}
|
|
|
|
|
fn set_bit_range(&mut self, msb: usize, lsb: usize, value: T) {
|
|
|
|
|
self.0.set_bit_range(msb, lsb, value);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Combines `bitfield_bitrange` and `bitfield_fields`.
|
|
|
|
|
///
|
|
|
|
|
/// The syntax of this macro is the syntax of a tuple struct, including attributes and
|
|
|
|
|
/// documentation comments, followed by a semicolon, some optional elements, and finally the fields
|
|
|
|
|
/// as described in the `bitfield_fields` documentation.
|
|
|
|
|
///
|
|
|
|
|
/// The first optional element is `no default BitRange;`. With that, no implementation of
|
|
|
|
|
/// `BitRange` will be generated.
|
|
|
|
|
///
|
|
|
|
|
/// The second optional element is `impl Debug;`. This will generate an implementation of
|
|
|
|
|
/// `fmt::Debug` with the `bitfield_debug` macro.
|
|
|
|
|
///
|
|
|
|
|
/// The difference with calling those macros separately is that `bitfield_fields` is called
|
|
|
|
|
/// from an appropriate `impl` block. If you use the non-slice form of `bitfield_bitrange`, the
|
|
|
|
|
/// default type for `bitfield_fields` will be set to the wrapped fields.
|
|
|
|
|
///
|
|
|
|
|
/// See the documentation of these macros for more information on their respective syntax.
|
|
|
|
|
///
|
|
|
|
|
/// # Example
|
|
|
|
|
///
|
|
|
|
|
/// ```rust
|
|
|
|
|
/// # #[macro_use] extern crate bitfield;
|
|
|
|
|
/// # fn main() {}
|
|
|
|
|
/// bitfield!{
|
|
|
|
|
/// pub struct BitField1(u16);
|
|
|
|
|
/// impl Debug;
|
|
|
|
|
/// // The fields default to u16
|
|
|
|
|
/// field1, set_field1: 10, 0;
|
|
|
|
|
/// pub field2, _ : 12, 3;
|
|
|
|
|
/// }
|
|
|
|
|
/// ```
|
|
|
|
|
///
|
|
|
|
|
/// or with a custom `BitRange` implementation :
|
|
|
|
|
/// ```rust
|
|
|
|
|
/// # #[macro_use] extern crate bitfield;
|
|
|
|
|
/// # use bitfield::BitRange;
|
|
|
|
|
/// # fn main() {}
|
|
|
|
|
/// bitfield!{
|
|
|
|
|
/// pub struct BitField1(u16);
|
|
|
|
|
/// no default BitRange;
|
|
|
|
|
/// impl Debug;
|
|
|
|
|
/// u8;
|
|
|
|
|
/// field1, set_field1: 10, 0;
|
|
|
|
|
/// pub field2, _ : 12, 3;
|
|
|
|
|
/// }
|
|
|
|
|
/// impl BitRange<u8> for BitField1 {
|
|
|
|
|
/// fn bit_range(&self, msb: usize, lsb: usize) -> u8 {
|
|
|
|
|
/// let width = msb - lsb + 1;
|
|
|
|
|
/// let mask = (1 << width) - 1;
|
|
|
|
|
/// ((self.0 >> lsb) & mask) as u8
|
|
|
|
|
/// }
|
|
|
|
|
/// fn set_bit_range(&mut self, msb: usize, lsb: usize, value: u8) {
|
|
|
|
|
/// self.0 = (value as u16) << lsb;
|
|
|
|
|
/// }
|
|
|
|
|
/// }
|
|
|
|
|
/// ```
|
|
|
|
|
#[macro_export(local_inner_macros)]
|
|
|
|
|
macro_rules! bitfield {
|
|
|
|
|
($(#[$attribute:meta])* pub struct $($rest:tt)*) => {
|
|
|
|
|
bitfield!($(#[$attribute])* (pub) struct $($rest)*);
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* struct $($rest:tt)*) => {
|
|
|
|
|
bitfield!($(#[$attribute])* () struct $($rest)*);
|
|
|
|
|
};
|
|
|
|
|
// Force `impl Debug` to always be after `no default BitRange` it the two are present.
|
|
|
|
|
// This simplify the rest of the macro.
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident($($type:tt)*); impl Debug; no default BitRange; $($rest:tt)*) => {
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name($($type)*); no default BitRange; impl Debug; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// If we have `impl Debug` without `no default BitRange`, we will still match, because when
|
|
|
|
|
// we call `bitfield_bitrange`, we add `no default BitRange`.
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident([$t:ty]); no default BitRange; impl Debug; $($rest:tt)*) => {
|
|
|
|
|
impl<T: AsMut<[$t]> + AsRef<[$t]> + crate::common::fmt::Debug> crate::common::fmt::Debug for $name<T> {
|
|
|
|
|
bitfield_debug!{struct $name; $($rest)*}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name([$t]); no default BitRange; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident([$t:ty]); no default BitRange; $($rest:tt)*) => {
|
|
|
|
|
$(#[$attribute])*
|
|
|
|
|
$($vis)* struct $name<T>(pub T);
|
|
|
|
|
|
|
|
|
|
impl<T: AsMut<[$t]> + AsRef<[$t]>> $name<T> {
|
|
|
|
|
bitfield_fields!{$($rest)*}
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident([$t:ty]); $($rest:tt)*) => {
|
|
|
|
|
bitfield_bitrange!(struct $name([$t]));
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name([$t]); no default BitRange; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// The only difference between the MSB0 version anf the non-MSB0 version, is the BitRange
|
|
|
|
|
// implementation. We delegate everything else to the non-MSB0 version of the macro.
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident(MSB0 [$t:ty]); no default BitRange; $($rest:tt)*) => {
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name([$t]); no default BitRange; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident(MSB0 [$t:ty]); $($rest:tt)*) => {
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|
|
bitfield_bitrange!(struct $name(MSB0 [$t]));
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bitfield!{$(#[$attribute])* ($($vis)*) struct $name([$t]); no default BitRange; $($rest)*}
|
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|
|
|
};
|
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|
|
|
|
|
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|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident($t:ty); no default BitRange; impl Debug; $($rest:tt)*) => {
|
|
|
|
|
impl crate::common::fmt::Debug for $name {
|
|
|
|
|
bitfield_debug!{struct $name; $($rest)*}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name($t); no default BitRange; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident($t:ty); no default BitRange; $($rest:tt)*) => {
|
|
|
|
|
$(#[$attribute])*
|
|
|
|
|
$($vis)* struct $name(pub $t);
|
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|
|
|
|
|
|
|
|
impl $name {
|
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|
|
|
bitfield_fields!{$t; $($rest)*}
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
($(#[$attribute:meta])* ($($vis:tt)*) struct $name:ident($t:ty); $($rest:tt)*) => {
|
|
|
|
|
bitfield_bitrange!(struct $name($t));
|
|
|
|
|
bitfield!{$(#[$attribute])* ($($vis)*) struct $name($t); no default BitRange; $($rest)*}
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// A trait to get or set ranges of bits.
|
|
|
|
|
pub trait BitRange<T> {
|
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|
|
|
fn get(&self) -> T;
|
|
|
|
|
/// Get a range of bits.
|
|
|
|
|
fn bit_range(&self, msb: usize, lsb: usize) -> T;
|
|
|
|
|
/// Set a range of bits.
|
|
|
|
|
fn set_bit_range(&mut self, msb: usize, lsb: usize, value: T);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// A trait to get or set a single bit.
|
|
|
|
|
///
|
|
|
|
|
/// This trait is implemented for all type that implement `BitRange<u8>`.
|
|
|
|
|
pub trait Bit {
|
|
|
|
|
/// Get a single bit.
|
|
|
|
|
fn bit(&self, bit: usize) -> bool;
|
|
|
|
|
|
|
|
|
|
/// Check if only specific bit is set.
|
|
|
|
|
fn bit_only(&self, bit: usize) -> bool;
|
|
|
|
|
|
|
|
|
|
/// Set a single bit.
|
|
|
|
|
fn set_bit(&mut self, bit: usize, value: bool);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
impl<T: BitRange<u8>> Bit for T {
|
|
|
|
|
fn bit(&self, bit: usize) -> bool {
|
|
|
|
|
self.bit_range(bit, bit) != 0
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn bit_only(&self, bit: usize) -> bool {
|
|
|
|
|
self.get() == (1 << bit) as u8
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn set_bit(&mut self, bit: usize, value: bool) {
|
|
|
|
|
self.set_bit_range(bit, bit, value as u8);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
macro_rules! impl_bitrange_for_u {
|
|
|
|
|
($t:ty, $bitrange_ty:ty) => {
|
|
|
|
|
impl BitRange<$bitrange_ty> for $t {
|
|
|
|
|
#[inline]
|
|
|
|
|
fn get(&self) -> $bitrange_ty {
|
|
|
|
|
*self as $bitrange_ty
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
|
fn bit_range(&self, msb: usize, lsb: usize) -> $bitrange_ty {
|
|
|
|
|
let bit_len = size_of::<$t>()*8;
|
|
|
|
|
let result_bit_len = size_of::<$bitrange_ty>()*8;
|
|
|
|
|
let result = ((*self << (bit_len - msb - 1)) >> (bit_len - msb - 1 + lsb))
|
|
|
|
|
as $bitrange_ty;
|
|
|
|
|
result << (result_bit_len - (msb - lsb + 1)) >> (result_bit_len - (msb - lsb + 1))
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
|
fn set_bit_range(&mut self, msb: usize, lsb: usize, value: $bitrange_ty) {
|
|
|
|
|
let bit_len = size_of::<$t>()*8;
|
|
|
|
|
let mask: $t = !(0 as $t)
|
|
|
|
|
<< (bit_len - msb - 1)
|
|
|
|
|
>> (bit_len - msb - 1 + lsb)
|
|
|
|
|
<< (lsb);
|
|
|
|
|
*self &= !mask;
|
|
|
|
|
*self |= (value as $t << lsb) & mask;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
macro_rules! impl_bitrange_for_u_combinations {
|
|
|
|
|
((),($($bitrange_ty:ty),*)) => {
|
|
|
|
|
|
|
|
|
|
};
|
|
|
|
|
(($t:ty),($($bitrange_ty:ty),*)) => {
|
|
|
|
|
$(impl_bitrange_for_u!{$t, $bitrange_ty})*
|
|
|
|
|
};
|
|
|
|
|
(($t_head:ty, $($t_rest:ty),*),($($bitrange_ty:ty),*)) => {
|
|
|
|
|
impl_bitrange_for_u_combinations!{($t_head), ($($bitrange_ty),*)}
|
|
|
|
|
impl_bitrange_for_u_combinations!{($($t_rest),*), ($($bitrange_ty),*)}
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
impl_bitrange_for_u_combinations! {(u8, u16, u32, u64, u128), (u8, u16, u32, u64, u128)}
|
|
|
|
|
impl_bitrange_for_u_combinations! {(u8, u16, u32, u64, u128), (i8, i16, i32, i64, i128)}
|
|
|
|
|
|
|
|
|
|
// Same as std::stringify but callable from local_inner_macros macros defined inside
|
|
|
|
|
// this crate.
|
|
|
|
|
#[macro_export]
|
|
|
|
|
#[doc(hidden)]
|
|
|
|
|
macro_rules! __bitfield_stringify {
|
|
|
|
|
($s:ident) => {
|
|
|
|
|
stringify!($s)
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Same as std::debug_assert but callable from local_inner_macros macros defined inside
|
|
|
|
|
// this crate.
|
|
|
|
|
#[macro_export]
|
|
|
|
|
#[doc(hidden)]
|
|
|
|
|
macro_rules! __bitfield_debug_assert {
|
|
|
|
|
($e:expr) => {
|
|
|
|
|
debug_assert!($e)
|
|
|
|
|
};
|
|
|
|
|
}
|
