--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/vec2d/Cargo.toml Sun Oct 14 21:13:32 2018 +0200
@@ -0,0 +1,6 @@
+[package]
+name = "vec2d"
+version = "0.1.0"
+authors = ["Andrey Korotaev <a.korotaev@hedgewars.org>"]
+
+[dependencies]
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/vec2d/src/lib.rs Sun Oct 14 21:13:32 2018 +0200
@@ -0,0 +1,77 @@
+use std::iter;
+use std::ops::{Index, IndexMut};
+
+struct Vec2D<T> {
+ data: Vec<T>,
+ width: usize,
+ height: usize,
+}
+
+impl<T> Index<usize> for Vec2D<T> {
+ type Output = [T];
+
+ #[inline]
+ fn index(&self, row: usize) -> &[T] {
+ debug_assert!(row < self.height);
+
+ let pos = row * self.width;
+
+ &self.data[pos..pos + self.width]
+ }
+}
+
+impl<T> IndexMut<usize> for Vec2D<T> {
+ #[inline]
+ fn index_mut(&mut self, row: usize) -> &mut [T] {
+ debug_assert!(row < self.height);
+
+ let pos = row * self.width;
+
+ &mut self.data[pos..pos + self.width]
+ }
+}
+
+impl<T: Copy> Vec2D<T> {
+ pub fn new(width: usize, height: usize, value: T) -> Self {
+ let mut vec = Self {
+ data: Vec::new(),
+ width,
+ height,
+ };
+
+ vec.data.extend(iter::repeat(value).take(width * height));
+
+ vec
+ }
+
+ #[inline]
+ pub fn width(&self) -> usize {
+ self.width
+ }
+
+ #[inline]
+ pub fn height(&self) -> usize {
+ self.height
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn basics() {
+ let mut v: Vec2D<u8> = Vec2D::new(2, 3, 0xff);
+
+ assert_eq!(v.width, 2);
+ assert_eq!(v.height, 3);
+
+ assert_eq!(v[0][0], 0xff);
+ assert_eq!(v[2][1], 0xff);
+
+ v[2][1] = 0;
+
+ assert_eq!(v[2][0], 0xff);
+ assert_eq!(v[2][1], 0);
+ }
+}