titaniumtown/othello
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

coords: use num::Integer::div_mod_floor for from_index

Browse Source
This commit is contained in:
Simon Gardling 2025-02-27 23:35:59 -05:00
parent cbf47482ad
commit 00238fc1f1
Signed by: titaniumtown
GPG Key ID: 9AB28AC10ECE533D
1 changed files with 6 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/repr/coords.rs
View File

@ -1,6 +1,5 @@
use std::fmt::Display;
use super::Board;
use num::Integer;
use static_assertions::const_assert;
// PERF! having `Coord` be of type `u8` (instead of usize) increases
@ -15,7 +14,7 @@ const_assert!(CoordPairInner::MAX as usize >= Board::BOARD_AREA as usize);
#[derive(PartialEq, Eq, Copy, Clone, Hash)]
pub struct CoordPair(pub CoordPairInner);
impl Display for CoordPair {
impl std::fmt::Display for CoordPair {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let (i, j) = (*self).into();
write!(f, "({}, {})", i, j)
@ -29,14 +28,12 @@ impl std::fmt::Debug for CoordPair {
}
/// Convert a row and column to an index in the board
pub const fn get_index(row: CoordAxis, col: CoordAxis) -> CoordPair {
const fn get_index(row: CoordAxis, col: CoordAxis) -> CoordPair {
CoordPair(row * Board::BOARD_SIZE + col)
}
pub const fn from_index(index: CoordPair) -> (CoordAxis, CoordAxis) {
let row = index.0 % Board::BOARD_SIZE;
let col = (index.0 - row) / Board::BOARD_SIZE;
(col, row)
fn from_index(index: CoordPair) -> (CoordAxis, CoordAxis) {
index.0.div_mod_floor(&Board::BOARD_SIZE)
}
impl From<(CoordAxis, CoordAxis)> for CoordPair {
@ -56,7 +53,7 @@ mod tests {
use super::*;
#[test]
fn into_outof() {
fn into_out_of() {
let a: CoordPair = (1, 3).into();
let back: (CoordAxis, CoordAxis) = a.into();
assert_eq!(back, (1, 3));