brk: first commit

_src/structs/height_map.rs

@@ -0,0 +1,64 @@
+use std::{iter::Sum, ops::RangeInclusive};
+
+use itertools::Itertools;
+
+use super::{AnyMap, GenericMap, Height, HeightMapChunkId, MapValue, SerializedVec};
+
+pub const HEIGHT_MAP_CHUNK_SIZE: u32 = 10_000;
+
+pub type HeightMap<Value> = GenericMap<Height, Value, HeightMapChunkId, SerializedVec<Value>>;
+
+impl<Value> HeightMap<Value>
+where
+    Value: MapValue,
+{
+    pub fn sum_range(&self, range: &RangeInclusive<u32>) -> Value
+    where
+        Value: Sum,
+    {
+        range
+            .to_owned()
+            .flat_map(|height| self.get(&Height::new(height)))
+            .sum::<Value>()
+    }
+
+    pub fn get_or_import_range_inclusive(&mut self, first: Height, last: Height) -> Vec<Value> {
+        ((*first)..=(*last))
+            .map(Height::new)
+            .map(|h| self.get_or_import(&h).unwrap())
+            .collect_vec()
+    }
+}
+
+pub trait AnyHeightMap: AnyMap {
+    fn get_initial_first_unsafe_height(&self) -> Option<Height>;
+
+    fn get_initial_last_height(&self) -> Option<Height>;
+
+    fn as_any_map(&self) -> &(dyn AnyMap + Send + Sync);
+
+    fn as_any_mut_map(&mut self) -> &mut dyn AnyMap;
+}
+
+impl<T> AnyHeightMap for HeightMap<T>
+where
+    T: MapValue,
+{
+    #[inline(always)]
+    fn get_initial_first_unsafe_height(&self) -> Option<Height> {
+        self.initial_first_unsafe_key
+    }
+
+    #[inline(always)]
+    fn get_initial_last_height(&self) -> Option<Height> {
+        self.initial_last_key
+    }
+
+    fn as_any_map(&self) -> &(dyn AnyMap + Send + Sync) {
+        self
+    }
+
+    fn as_any_mut_map(&mut self) -> &mut dyn AnyMap {
+        self
+    }
+}