From f7a7bf20a99b1d52ef5f936705611ce24a1006b7 Mon Sep 17 00:00:00 2001
From: Micha White <botahamec@outlook.com>
Date: Wed, 27 Sep 2023 09:41:01 -0400
Subject: Edited some of the crates

---
 ai/src/transposition_table.rs | 157 ------------------------------------------
 1 file changed, 157 deletions(-)
 delete mode 100644 ai/src/transposition_table.rs

(limited to 'ai/src/transposition_table.rs')

diff --git a/ai/src/transposition_table.rs b/ai/src/transposition_table.rs
deleted file mode 100644
index 2b56a66..0000000
--- a/ai/src/transposition_table.rs
+++ /dev/null
@@ -1,157 +0,0 @@
-use crate::CheckersBitBoard;
-use parking_lot::RwLock;
-use std::num::NonZeroU8;
-
-#[derive(Copy, Clone, Debug)]
-struct TranspositionTableEntry {
-	board: CheckersBitBoard,
-	eval: f32,
-	depth: NonZeroU8,
-}
-
-impl TranspositionTableEntry {
-	const fn new(board: CheckersBitBoard, eval: f32, depth: NonZeroU8) -> Self {
-		Self { board, eval, depth }
-	}
-}
-
-pub struct TranspositionTable {
-	replace_table: Box<[RwLock<Option<TranspositionTableEntry>>]>,
-	depth_table: Box<[RwLock<Option<TranspositionTableEntry>>]>,
-}
-
-#[derive(Copy, Clone, Debug)]
-pub struct TranspositionTableRef<'a> {
-	replace_table: &'a [RwLock<Option<TranspositionTableEntry>>],
-	depth_table: &'a [RwLock<Option<TranspositionTableEntry>>],
-}
-
-impl<'a> TranspositionTableRef<'a> {
-	pub fn get(self, board: CheckersBitBoard, depth: u8) -> Option<f32> {
-		let table_len = self.replace_table.as_ref().len();
-
-		// try the replace table
-		let entry = unsafe {
-			self.replace_table
-				.as_ref()
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.read()
-		};
-		if let Some(entry) = *entry {
-			if entry.board == board && entry.depth.get() >= depth {
-				return Some(entry.eval);
-			}
-		}
-
-		// try the depth table
-		let entry = unsafe {
-			self.depth_table
-				.as_ref()
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.read()
-		};
-		match *entry {
-			Some(entry) => {
-				if entry.board == board {
-					if entry.depth.get() >= depth {
-						Some(entry.eval)
-					} else {
-						None
-					}
-				} else {
-					None
-				}
-			}
-			None => None,
-		}
-	}
-
-	pub fn get_any_depth(self, board: CheckersBitBoard) -> Option<f32> {
-		let table_len = self.replace_table.as_ref().len();
-
-		// try the depth table
-		let entry = unsafe {
-			self.depth_table
-				.as_ref()
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.read()
-		};
-		if let Some(entry) = *entry {
-			if entry.board == board {
-				return Some(entry.eval);
-			}
-		}
-
-		// try the replace table
-		let entry = unsafe {
-			self.replace_table
-				.as_ref()
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.read()
-		};
-		match *entry {
-			Some(entry) => {
-				if entry.board == board {
-					Some(entry.eval)
-				} else {
-					None
-				}
-			}
-			None => None,
-		}
-	}
-
-	pub fn insert(&self, board: CheckersBitBoard, eval: f32, depth: NonZeroU8) {
-		let table_len = self.replace_table.as_ref().len();
-
-		// insert to the replace table
-		let mut entry = unsafe {
-			self.replace_table
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.write()
-		};
-		*entry = Some(TranspositionTableEntry::new(board, eval, depth));
-
-		// insert to the depth table, only if the new depth is higher
-		let mut entry = unsafe {
-			self.depth_table
-				.get_unchecked(board.hash_code() as usize % table_len)
-				.write()
-		};
-		match *entry {
-			Some(entry_val) => {
-				if depth >= entry_val.depth {
-					*entry = Some(TranspositionTableEntry::new(board, eval, depth));
-				}
-			}
-			None => *entry = Some(TranspositionTableEntry::new(board, eval, depth)),
-		}
-	}
-}
-
-impl TranspositionTable {
-	pub fn new(table_size: usize) -> Self {
-		let mut replace_table = Box::new_uninit_slice(table_size / 2);
-		let mut depth_table = Box::new_uninit_slice(table_size / 2);
-
-		for entry in replace_table.iter_mut() {
-			entry.write(RwLock::new(None));
-		}
-
-		for entry in depth_table.iter_mut() {
-			entry.write(RwLock::new(None));
-		}
-
-		Self {
-			replace_table: unsafe { replace_table.assume_init() },
-			depth_table: unsafe { depth_table.assume_init() },
-		}
-	}
-
-	pub fn mut_ref(&mut self) -> TranspositionTableRef {
-		TranspositionTableRef {
-			replace_table: &self.replace_table,
-			depth_table: &self.depth_table,
-		}
-	}
-}
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