Update from laptop before wipe

2021-07-11/array-queue/Cargo.lock

@@ -0,0 +1,627 @@
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+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

2021-07-11/array-queue/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "array-queue"
+version = "0.1.0"
+authors = ["Rekai Musuka <rekai@musuka.dev>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+thiserror = "1.0.26"
+
+[dev-dependencies]
+criterion = "0.3.4"
+
+[[bench]]
+name = "benchmarks"
+harness = false

2021-07-11/array-queue/benches/benchmarks.rs

@@ -0,0 +1,17 @@
+use array_queue::ArrayQueue;
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+fn push_pop_50(mut queue: ArrayQueue<u8, 100>) {
+    for _ in 0..50 {
+        queue.push(5);
+        let _ = queue.pop();
+    }
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let queue = ArrayQueue::default();
+    c.bench_function("push/pull 50", |b| b.iter(move || push_pop_50(queue)));
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

2021-07-11/array-queue/src/alloc.rs

@@ -0,0 +1 @@
+

2021-07-11/array-queue/src/error.rs

@@ -0,0 +1,7 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum ArrayQueueError {
+    #[error("Array queue capacity reached")]
+    CapacityReached,
+}

2021-07-11/array-queue/src/lib.rs

@@ -0,0 +1,157 @@
+use crate::error::ArrayQueueError;
+
+mod alloc;
+mod error;
+
+#[derive(Clone, Copy, Debug)]
+pub struct ArrayQueue<T, const N: usize> {
+    inner: [T; N],
+    head: usize,
+    tail: usize,
+}
+
+impl<T: Default + Copy, const N: usize> Default for ArrayQueue<T, N> {
+    fn default() -> Self {
+        Self {
+            inner: [T::default(); N],
+            head: Default::default(),
+            tail: Default::default(),
+        }
+    }
+}
+
+impl<T: Copy, const N: usize> ArrayQueue<T, N> {
+    pub fn new(default: T) -> Self {
+        Self {
+            inner: [default; N],
+            head: Default::default(),
+            tail: Default::default(),
+        }
+    }
+
+    pub fn push(&mut self, value: T) -> Result<(), ArrayQueueError> {
+        if self.tail >= N {
+            return Err(ArrayQueueError::CapacityReached);
+        }
+
+        self.inner[self.tail] = value;
+        self.tail += 1;
+
+        Ok(())
+    }
+
+    pub fn pop(&mut self) -> Option<&T> {
+        let prev_head = self.head;
+        self.head += 1;
+
+        if prev_head < self.tail {
+            self.inner.get(prev_head)
+        } else {
+            None
+        }
+    }
+
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.tail - self.head
+    }
+
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    #[inline]
+    pub fn capacity(&self) -> usize {
+        N
+    }
+
+    pub fn clear(&mut self) {
+        self.head = 0;
+        self.tail = 0;
+    }
+}
+
+trait Queue<T> {}
+
+#[cfg(test)]
+mod tests {
+
+    use super::ArrayQueue;
+
+    #[test]
+    fn init_with_default() {
+        let _queue: ArrayQueue<u8, 5> = Default::default();
+    }
+
+    #[test]
+    fn init_with_new() {
+        let _queue: ArrayQueue<u8, 5> = ArrayQueue::new(5);
+    }
+
+    #[test]
+    fn default_create_default_values() {
+        let queue: ArrayQueue<u8, 2> = Default::default();
+
+        assert_eq!(queue.inner[0], 0);
+        assert_eq!(queue.inner[1], 0);
+        assert_eq!(queue.inner.len(), 2);
+    }
+
+    #[test]
+    fn new_create_default_values() {
+        let queue: ArrayQueue<u8, 2> = ArrayQueue::new(5);
+
+        assert_eq!(queue.inner[0], 5);
+        assert_eq!(queue.inner[1], 5);
+        assert_eq!(queue.inner.len(), 2);
+    }
+
+    #[test]
+    fn new_queue_is_empty() {
+        let queue: ArrayQueue<u8, 5> = Default::default();
+
+        assert!(queue.is_empty());
+    }
+
+    #[test]
+    #[should_panic]
+    fn push_too_much() {
+        let mut queue: ArrayQueue<u8, 10> = Default::default();
+
+        for _ in 0..100 {
+            queue.push(1).unwrap();
+        }
+    }
+
+    #[test]
+    fn basic_len() {
+        let mut queue: ArrayQueue<u8, 10> = Default::default();
+
+        assert_eq!(queue.len(), 0);
+        queue.push(1).unwrap();
+        assert_eq!(queue.len(), 1);
+        let _ = queue.pop();
+        assert_eq!(queue.len(), 0);
+    }
+
+    #[test]
+    fn basic_push() {
+        let mut queue: ArrayQueue<u8, 10> = Default::default();
+
+        queue.push(255).unwrap();
+
+        assert_eq!(queue.inner[0], 255);
+    }
+
+    #[test]
+    fn basic_pop() {
+        let mut queue: ArrayQueue<u8, 10> = Default::default();
+
+        queue.push(255).unwrap();
+        let left = queue.pop();
+
+        assert_eq!(left, Some(&255));
+        assert_eq!(queue.inner[0], 255);
+    }
+}