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arraymap.rs
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#[derive(Clone)]
pub struct ArrayMap<T> {
offset: usize,
elements: Vec<Option<T>>
}
impl <T: std::clone::Clone> ArrayMap<T> {
pub fn new(start_key: usize, end_key: usize) -> ArrayMap<T> {
ArrayMap {
offset: start_key,
elements: vec![None; end_key - start_key]
}
}
pub fn insert(&mut self, key: usize, value: T) {
self.elements[key - self.offset] = Some(value);
}
pub fn get(&self, key: usize) -> Option<&T> {
self.elements[key - self.offset].as_ref()
}
pub fn get_mut(&mut self, key: usize) -> Option<&mut T> {
self.elements[key - self.offset].as_mut()
}
pub fn keys(&self) -> Vec<usize> {
let mut result = Vec::with_capacity(self.elements.len());
for i in 0..self.elements.len() {
if self.elements[i].is_some() {
result.push(i + self.offset);
}
}
return result;
}
}
#[derive(Clone)]
pub struct UsizeArrayMap {
offset: usize,
elements: Vec<usize>
}
impl UsizeArrayMap {
pub fn new(start_key: usize, end_key: usize) -> UsizeArrayMap {
UsizeArrayMap {
offset: start_key,
elements: vec![0; end_key - start_key]
}
}
pub fn swap(&mut self, key: usize, other_key: usize) {
self.elements.swap(key, other_key);
}
pub fn insert(&mut self, key: usize, value: usize) {
self.elements[key - self.offset] = value;
}
pub fn get(&self, key: usize) -> usize {
self.elements[key - self.offset]
}
pub fn decrement(&mut self, key: usize) {
self.elements[key - self.offset] -= 1;
}
pub fn increment(&mut self, key: usize) {
self.elements[key - self.offset] += 1;
}
}
#[derive(Clone)]
pub struct BoolArrayMap {
offset: usize,
elements: Vec<bool>
}
impl BoolArrayMap {
pub fn new(start_key: usize, end_key: usize) -> BoolArrayMap {
BoolArrayMap {
offset: start_key,
elements: vec![false; end_key - start_key]
}
}
pub fn insert(&mut self, key: usize, value: bool) {
self.elements[key - self.offset] = value;
}
pub fn get(&self, key: usize) -> bool {
self.elements[key - self.offset]
}
}