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Sudoku up through chapter 7

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This commit is contained in:
Dan Buch
2022-11-26 09:42:41 -05:00
parent 7d2ac20ce1
commit 7f2f579241
3 changed files with 88 additions and 37 deletions
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67
piston-tutorials/sudoku/src/gameboard.rs
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@@ -1,21 +1,42 @@
//! Game board logic.
use std::fs::read_to_string;
const SIZE: usize = 9;
#[derive(Clone, Copy, Debug, Default, PartialEq)]
pub struct Cell {
pub value: u8,
pub loaded: bool,
}
#[derive(Debug, PartialEq)]
pub struct Gameboard {
pub cells: [[u8; SIZE]; SIZE],
pub cells: [[Cell; SIZE]; SIZE],
}
impl Gameboard {
pub fn new() -> Gameboard {
Gameboard {
cells: [[0; SIZE]; SIZE],
cells: [[Cell::default(); SIZE]; SIZE],
}
}
pub fn from_cells(cells: [[u8; SIZE]; SIZE]) -> Gameboard {
let mut ret = Gameboard::new();
for (i, row) in cells.iter().enumerate() {
for (j, &col) in row.iter().enumerate() {
ret.cells[i][j] = Cell {
value: col,
loaded: col != 0,
};
}
}
ret
}
pub fn char(&self, ind: [usize; 2]) -> Option<char> {
Some(match self.cells[ind[1]][ind[0]] {
Some(match self.cells[ind[1]][ind[0]].value {
1 => '1',
2 => '2',
3 => '3',
@@ -30,14 +51,14 @@ impl Gameboard {
}
pub fn set(&mut self, ind: [usize; 2], val: u8) {
self.cells[ind[1]][ind[0]] = val;
if !self.cells[ind[1]][ind[0]].loaded {
self.cells[ind[1]][ind[0]].value = val;
}
}
pub fn load_sdm(filename: &str) -> Self {
use std::fs::read_to_string;
let data = read_to_string(filename).expect("failed to read SDM file");
let mut cells = [[0; SIZE]; SIZE];
let mut cells = [[Cell::default(); SIZE]; SIZE];
let mut row = 0;
let mut col = 0;
for c in data.chars() {
@@ -45,8 +66,12 @@ impl Gameboard {
col = 0;
row += 1;
}
if let Some(d) = c.to_digit(10) {
cells[row][col] = d as u8;
if let Some(v) = c.to_digit(10) {
let value = v as u8;
cells[row][col] = Cell {
value,
loaded: value != 0,
};
col += 1;
}
}
@@ -62,19 +87,17 @@ mod tests {
#[test]
fn load_sdm() {
let got = Gameboard::load_sdm("static/puzzle.sdm");
let want = Gameboard {
cells: [
[0, 1, 6, 4, 0, 0, 0, 0, 0],
[2, 0, 0, 0, 0, 9, 0, 0, 0],
[4, 0, 0, 0, 0, 0, 0, 6, 2],
[0, 7, 0, 2, 3, 0, 1, 0, 0],
[1, 0, 0, 0, 0, 0, 0, 0, 3],
[0, 0, 3, 0, 8, 7, 0, 4, 0],
[9, 6, 0, 0, 0, 0, 0, 0, 5],
[0, 0, 0, 8, 0, 0, 0, 0, 7],
[0, 0, 0, 0, 0, 6, 8, 2, 0],
],
};
let want = Gameboard::from_cells([
[0, 1, 6, 4, 0, 0, 0, 0, 0],
[2, 0, 0, 0, 0, 9, 0, 0, 0],
[4, 0, 0, 0, 0, 0, 0, 6, 2],
[0, 7, 0, 2, 3, 0, 1, 0, 0],
[1, 0, 0, 0, 0, 0, 0, 0, 3],
[0, 0, 3, 0, 8, 7, 0, 4, 0],
[9, 6, 0, 0, 0, 0, 0, 0, 5],
[0, 0, 0, 8, 0, 0, 0, 0, 7],
[0, 0, 0, 0, 0, 6, 8, 2, 0],
]);
assert_eq!(got, want);
}
}