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-rwxr-xr-x[-rw-r--r--]model/src/moves.rs590
1 files changed, 295 insertions, 295 deletions
diff --git a/model/src/moves.rs b/model/src/moves.rs
index c840e8f..c6dd060 100644..100755
--- a/model/src/moves.rs
+++ b/model/src/moves.rs
@@ -1,295 +1,295 @@
-use crate::{CheckersBitBoard, SquareCoordinate};
-use std::fmt::{Display, Formatter};
-
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
-#[repr(C)]
-pub enum MoveDirection {
- ForwardLeft = 0,
- ForwardRight = 1,
- BackwardLeft = 2,
- BackwardRight = 3,
-}
-
-/// A checkers move
-// This is stored as a single byte. The first five bits represent the starting
-// position, the next two bits represent the direction, and the last bit
-// represents whether or not the move is a jump.
-//
-// starting position direction jump
-// |--------------------|--------|----|
-// 5 2 1
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
-pub struct Move(u8);
-
-impl Move {
- /// Create a new move
- ///
- /// # Arguments
- ///
- /// * `start` - The location of the piece that should move
- /// * `direction` - The direction the piece should move in
- /// * `jump` - Whether or not the piece should jump
- pub const fn new(start: usize, direction: MoveDirection, jump: bool) -> Self {
- Self(((start as u8) << 3) | ((direction as u8) << 1) | jump as u8)
- }
-
- /// The stating position of the move
- pub const fn start(self) -> u32 {
- ((self.0 >> 3) & 0b11111) as u32
- }
-
- /// The direction the move goes in
- pub const fn direction(self) -> MoveDirection {
- match (self.0 >> 1) & 0b11 {
- 0 => MoveDirection::ForwardLeft,
- 1 => MoveDirection::ForwardRight,
- 2 => MoveDirection::BackwardLeft,
- 3 => MoveDirection::BackwardRight,
- _ => unreachable!(),
- }
- }
-
- /// Returns `true` if the move is a jump
- pub const fn is_jump(self) -> bool {
- (self.0 & 1) == 1
- }
-
- /// Calculates the value of the end position of the move
- pub const fn end_position(self) -> usize {
- let dest = match self.is_jump() {
- false => match self.direction() {
- MoveDirection::ForwardLeft => (self.start() + 7) % 32,
- MoveDirection::ForwardRight => (self.start() + 1) % 32,
- MoveDirection::BackwardLeft => self.start().wrapping_sub(1) % 32,
- MoveDirection::BackwardRight => self.start().wrapping_sub(7) % 32,
- },
- true => match self.direction() {
- MoveDirection::ForwardLeft => (self.start() + 14) % 32,
- MoveDirection::ForwardRight => (self.start() + 2) % 32,
- MoveDirection::BackwardLeft => self.start().wrapping_sub(2) % 32,
- MoveDirection::BackwardRight => self.start().wrapping_sub(14) % 32,
- },
- };
- dest as usize
- }
-
- /// Calculates the value of the position that was jumped over
- ///
- /// # Safety
- ///
- /// The result of this function is undefined if the move isn't a jump
- pub const unsafe fn jump_position(self) -> usize {
- let pos = match self.direction() {
- MoveDirection::ForwardLeft => (self.start() + 7) % 32,
- MoveDirection::ForwardRight => (self.start() + 1) % 32,
- MoveDirection::BackwardLeft => self.start().wrapping_sub(1) % 32,
- MoveDirection::BackwardRight => self.start().wrapping_sub(7) % 32,
- };
- pos as usize
- }
-
- /// Apply the move to a board. This does not mutate the original board,
- /// but instead returns a new one.
- ///
- /// # Arguments
- ///
- /// * `board` - The board to apply the move to
- ///
- /// # Panics
- ///
- /// Panics if the starting position of this move is greater than or equal to 32
- ///
- /// # Safety
- ///
- /// Applying an illegal move to the board is undefined behavior.
- /// This functions results in undefined behavior if:
- /// * The piece moves in a direction which would move it outside of the board
- /// * The starting position of this move doesn't contain a piece
- /// * The end position already contains a piece
- /// * A jump occurs where jumps are not allowed
- /// * A move is not a jump even though jumps are available
- pub const unsafe fn apply_to(self, board: CheckersBitBoard) -> CheckersBitBoard {
- match self.is_jump() {
- false => match self.direction() {
- MoveDirection::ForwardLeft => {
- board.move_piece_forward_left_unchecked(self.start() as usize)
- }
- MoveDirection::ForwardRight => {
- board.move_piece_forward_right_unchecked(self.start() as usize)
- }
- MoveDirection::BackwardLeft => {
- board.move_piece_backward_left_unchecked(self.start() as usize)
- }
- MoveDirection::BackwardRight => {
- board.move_piece_backward_right_unchecked(self.start() as usize)
- }
- },
- true => match self.direction() {
- MoveDirection::ForwardLeft => {
- board.jump_piece_forward_left_unchecked(self.start() as usize)
- }
- MoveDirection::ForwardRight => {
- board.jump_piece_forward_right_unchecked(self.start() as usize)
- }
- MoveDirection::BackwardLeft => {
- board.jump_piece_backward_left_unchecked(self.start() as usize)
- }
- MoveDirection::BackwardRight => {
- board.jump_piece_backward_right_unchecked(self.start() as usize)
- }
- },
- }
- }
-}
-
-impl Display for Move {
- fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
- let Some(start) =
- SquareCoordinate::from_ampere_value(self.start() as usize).to_normal_value()
- else {
- return Err(std::fmt::Error);
- };
-
- let separator = if self.is_jump() { "x" } else { "-" };
-
- let Some(end) = SquareCoordinate::from_ampere_value(self.end_position()).to_normal_value()
- else {
- return Err(std::fmt::Error);
- };
-
- write!(f, "{start}{separator}{end}")
- }
-}
-
-#[cfg(test)]
-mod tests {
-
- use super::*;
- use proptest::prelude::*;
-
- proptest! {
- #[test]
- fn new(start in 0usize..32, jump in proptest::bool::ANY) {
- let direction = MoveDirection::ForwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.start() as usize, start);
- assert_eq!(move_test.direction(), direction);
- assert_eq!(move_test.is_jump(), jump);
-
- let direction = MoveDirection::ForwardRight;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.start() as usize, start);
- assert_eq!(move_test.direction(), direction);
- assert_eq!(move_test.is_jump(), jump);
-
- let direction = MoveDirection::BackwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.start() as usize, start);
- assert_eq!(move_test.direction(), direction);
- assert_eq!(move_test.is_jump(), jump);
-
- let direction = MoveDirection::BackwardRight;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.start() as usize, start);
- assert_eq!(move_test.direction(), direction);
- assert_eq!(move_test.is_jump(), jump);
- }
-
- #[test]
- fn start(start in 0usize..32, jump in proptest::bool::ANY) {
- let direction = MoveDirection::ForwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.start(), start as u32);
- }
-
- #[test]
- fn direction(start in 0usize..32, jump in proptest::bool::ANY) {
- let direction = MoveDirection::ForwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.direction(), direction);
-
- let direction = MoveDirection::ForwardRight;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.direction(), direction);
-
- let direction = MoveDirection::BackwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.direction(), direction);
-
- let direction = MoveDirection::BackwardRight;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.direction(), direction);
- }
-
- #[test]
- fn is_jump(start in 0usize..32, jump in proptest::bool::ANY) {
- let direction = MoveDirection::ForwardLeft;
- let move_test = Move::new(start, direction, jump);
- assert_eq!(move_test.is_jump(), jump);
- }
- }
-
- #[test]
- fn end_position_forward_left_slide() {
- let direction = MoveDirection::ForwardLeft;
- let start = 8;
- let move_test = Move::new(start, direction, false);
- assert_eq!(move_test.end_position(), 15);
- }
-
- #[test]
- fn end_position_forward_right_slide() {
- let direction = MoveDirection::ForwardRight;
- let start = 26;
- let move_test = Move::new(start, direction, false);
- assert_eq!(move_test.end_position(), 27);
- }
-
- #[test]
- fn end_position_backward_right_slide() {
- let direction = MoveDirection::BackwardRight;
- let start = 2;
- let move_test = Move::new(start, direction, false);
- assert_eq!(move_test.end_position(), 27);
- }
-
- #[test]
- fn end_position_backward_left_slide() {
- let direction = MoveDirection::BackwardLeft;
- let start = 16;
- let move_test = Move::new(start, direction, false);
- assert_eq!(move_test.end_position(), 15);
- }
-
- #[test]
- fn end_position_forward_left_jump() {
- let direction = MoveDirection::ForwardLeft;
- let start = 8;
- let move_test = Move::new(start, direction, true);
- assert_eq!(move_test.end_position(), 22);
- }
-
- #[test]
- fn end_position_forward_right_jump() {
- let direction = MoveDirection::ForwardRight;
- let start = 26;
- let move_test = Move::new(start, direction, true);
- assert_eq!(move_test.end_position(), 28);
- }
-
- #[test]
- fn end_position_backward_right_jump() {
- let direction = MoveDirection::BackwardRight;
- let start = 2;
- let move_test = Move::new(start, direction, true);
- assert_eq!(move_test.end_position(), 20);
- }
-
- #[test]
- fn end_position_backward_left_jump() {
- let direction = MoveDirection::BackwardLeft;
- let start = 16;
- let move_test = Move::new(start, direction, true);
- assert_eq!(move_test.end_position(), 14);
- }
-}
+use crate::{CheckersBitBoard, SquareCoordinate};
+use std::fmt::{Display, Formatter};
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+#[repr(C)]
+pub enum MoveDirection {
+ ForwardLeft = 0,
+ ForwardRight = 1,
+ BackwardLeft = 2,
+ BackwardRight = 3,
+}
+
+/// A checkers move
+// This is stored as a single byte. The first five bits represent the starting
+// position, the next two bits represent the direction, and the last bit
+// represents whether or not the move is a jump.
+//
+// starting position direction jump
+// |--------------------|--------|----|
+// 5 2 1
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
+pub struct Move(u8);
+
+impl Move {
+ /// Create a new move
+ ///
+ /// # Arguments
+ ///
+ /// * `start` - The location of the piece that should move
+ /// * `direction` - The direction the piece should move in
+ /// * `jump` - Whether or not the piece should jump
+ pub const fn new(start: usize, direction: MoveDirection, jump: bool) -> Self {
+ Self(((start as u8) << 3) | ((direction as u8) << 1) | jump as u8)
+ }
+
+ /// The stating position of the move
+ pub const fn start(self) -> u32 {
+ ((self.0 >> 3) & 0b11111) as u32
+ }
+
+ /// The direction the move goes in
+ pub const fn direction(self) -> MoveDirection {
+ match (self.0 >> 1) & 0b11 {
+ 0 => MoveDirection::ForwardLeft,
+ 1 => MoveDirection::ForwardRight,
+ 2 => MoveDirection::BackwardLeft,
+ 3 => MoveDirection::BackwardRight,
+ _ => unreachable!(),
+ }
+ }
+
+ /// Returns `true` if the move is a jump
+ pub const fn is_jump(self) -> bool {
+ (self.0 & 1) == 1
+ }
+
+ /// Calculates the value of the end position of the move
+ pub const fn end_position(self) -> usize {
+ let dest = match self.is_jump() {
+ false => match self.direction() {
+ MoveDirection::ForwardLeft => (self.start() + 7) % 32,
+ MoveDirection::ForwardRight => (self.start() + 1) % 32,
+ MoveDirection::BackwardLeft => self.start().wrapping_sub(1) % 32,
+ MoveDirection::BackwardRight => self.start().wrapping_sub(7) % 32,
+ },
+ true => match self.direction() {
+ MoveDirection::ForwardLeft => (self.start() + 14) % 32,
+ MoveDirection::ForwardRight => (self.start() + 2) % 32,
+ MoveDirection::BackwardLeft => self.start().wrapping_sub(2) % 32,
+ MoveDirection::BackwardRight => self.start().wrapping_sub(14) % 32,
+ },
+ };
+ dest as usize
+ }
+
+ /// Calculates the value of the position that was jumped over
+ ///
+ /// # Safety
+ ///
+ /// The result of this function is undefined if the move isn't a jump
+ pub const unsafe fn jump_position(self) -> usize {
+ let pos = match self.direction() {
+ MoveDirection::ForwardLeft => (self.start() + 7) % 32,
+ MoveDirection::ForwardRight => (self.start() + 1) % 32,
+ MoveDirection::BackwardLeft => self.start().wrapping_sub(1) % 32,
+ MoveDirection::BackwardRight => self.start().wrapping_sub(7) % 32,
+ };
+ pos as usize
+ }
+
+ /// Apply the move to a board. This does not mutate the original board,
+ /// but instead returns a new one.
+ ///
+ /// # Arguments
+ ///
+ /// * `board` - The board to apply the move to
+ ///
+ /// # Panics
+ ///
+ /// Panics if the starting position of this move is greater than or equal to 32
+ ///
+ /// # Safety
+ ///
+ /// Applying an illegal move to the board is undefined behavior.
+ /// This functions results in undefined behavior if:
+ /// * The piece moves in a direction which would move it outside of the board
+ /// * The starting position of this move doesn't contain a piece
+ /// * The end position already contains a piece
+ /// * A jump occurs where jumps are not allowed
+ /// * A move is not a jump even though jumps are available
+ pub const unsafe fn apply_to(self, board: CheckersBitBoard) -> CheckersBitBoard {
+ match self.is_jump() {
+ false => match self.direction() {
+ MoveDirection::ForwardLeft => {
+ board.move_piece_forward_left_unchecked(self.start() as usize)
+ }
+ MoveDirection::ForwardRight => {
+ board.move_piece_forward_right_unchecked(self.start() as usize)
+ }
+ MoveDirection::BackwardLeft => {
+ board.move_piece_backward_left_unchecked(self.start() as usize)
+ }
+ MoveDirection::BackwardRight => {
+ board.move_piece_backward_right_unchecked(self.start() as usize)
+ }
+ },
+ true => match self.direction() {
+ MoveDirection::ForwardLeft => {
+ board.jump_piece_forward_left_unchecked(self.start() as usize)
+ }
+ MoveDirection::ForwardRight => {
+ board.jump_piece_forward_right_unchecked(self.start() as usize)
+ }
+ MoveDirection::BackwardLeft => {
+ board.jump_piece_backward_left_unchecked(self.start() as usize)
+ }
+ MoveDirection::BackwardRight => {
+ board.jump_piece_backward_right_unchecked(self.start() as usize)
+ }
+ },
+ }
+ }
+}
+
+impl Display for Move {
+ fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+ let Some(start) =
+ SquareCoordinate::from_ampere_value(self.start() as usize).to_normal_value()
+ else {
+ return Err(std::fmt::Error);
+ };
+
+ let separator = if self.is_jump() { "x" } else { "-" };
+
+ let Some(end) = SquareCoordinate::from_ampere_value(self.end_position()).to_normal_value()
+ else {
+ return Err(std::fmt::Error);
+ };
+
+ write!(f, "{start}{separator}{end}")
+ }
+}
+
+#[cfg(test)]
+mod tests {
+
+ use super::*;
+ use proptest::prelude::*;
+
+ proptest! {
+ #[test]
+ fn new(start in 0usize..32, jump in proptest::bool::ANY) {
+ let direction = MoveDirection::ForwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.start() as usize, start);
+ assert_eq!(move_test.direction(), direction);
+ assert_eq!(move_test.is_jump(), jump);
+
+ let direction = MoveDirection::ForwardRight;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.start() as usize, start);
+ assert_eq!(move_test.direction(), direction);
+ assert_eq!(move_test.is_jump(), jump);
+
+ let direction = MoveDirection::BackwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.start() as usize, start);
+ assert_eq!(move_test.direction(), direction);
+ assert_eq!(move_test.is_jump(), jump);
+
+ let direction = MoveDirection::BackwardRight;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.start() as usize, start);
+ assert_eq!(move_test.direction(), direction);
+ assert_eq!(move_test.is_jump(), jump);
+ }
+
+ #[test]
+ fn start(start in 0usize..32, jump in proptest::bool::ANY) {
+ let direction = MoveDirection::ForwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.start(), start as u32);
+ }
+
+ #[test]
+ fn direction(start in 0usize..32, jump in proptest::bool::ANY) {
+ let direction = MoveDirection::ForwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.direction(), direction);
+
+ let direction = MoveDirection::ForwardRight;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.direction(), direction);
+
+ let direction = MoveDirection::BackwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.direction(), direction);
+
+ let direction = MoveDirection::BackwardRight;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.direction(), direction);
+ }
+
+ #[test]
+ fn is_jump(start in 0usize..32, jump in proptest::bool::ANY) {
+ let direction = MoveDirection::ForwardLeft;
+ let move_test = Move::new(start, direction, jump);
+ assert_eq!(move_test.is_jump(), jump);
+ }
+ }
+
+ #[test]
+ fn end_position_forward_left_slide() {
+ let direction = MoveDirection::ForwardLeft;
+ let start = 8;
+ let move_test = Move::new(start, direction, false);
+ assert_eq!(move_test.end_position(), 15);
+ }
+
+ #[test]
+ fn end_position_forward_right_slide() {
+ let direction = MoveDirection::ForwardRight;
+ let start = 26;
+ let move_test = Move::new(start, direction, false);
+ assert_eq!(move_test.end_position(), 27);
+ }
+
+ #[test]
+ fn end_position_backward_right_slide() {
+ let direction = MoveDirection::BackwardRight;
+ let start = 2;
+ let move_test = Move::new(start, direction, false);
+ assert_eq!(move_test.end_position(), 27);
+ }
+
+ #[test]
+ fn end_position_backward_left_slide() {
+ let direction = MoveDirection::BackwardLeft;
+ let start = 16;
+ let move_test = Move::new(start, direction, false);
+ assert_eq!(move_test.end_position(), 15);
+ }
+
+ #[test]
+ fn end_position_forward_left_jump() {
+ let direction = MoveDirection::ForwardLeft;
+ let start = 8;
+ let move_test = Move::new(start, direction, true);
+ assert_eq!(move_test.end_position(), 22);
+ }
+
+ #[test]
+ fn end_position_forward_right_jump() {
+ let direction = MoveDirection::ForwardRight;
+ let start = 26;
+ let move_test = Move::new(start, direction, true);
+ assert_eq!(move_test.end_position(), 28);
+ }
+
+ #[test]
+ fn end_position_backward_right_jump() {
+ let direction = MoveDirection::BackwardRight;
+ let start = 2;
+ let move_test = Move::new(start, direction, true);
+ assert_eq!(move_test.end_position(), 20);
+ }
+
+ #[test]
+ fn end_position_backward_left_jump() {
+ let direction = MoveDirection::BackwardLeft;
+ let start = 16;
+ let move_test = Move::new(start, direction, true);
+ assert_eq!(move_test.end_position(), 14);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2026-03-04 08:48:14 +0000