use std::ops;
#[derive(Debug)]
pub struct Window<T> {
inner: T,
range: ops::Range<usize>,
}
impl<T: AsRef<[u8]>> Window<T> {
pub fn new(t: T) -> Window<T> {
Window {
range: 0..t.as_ref().len(),
inner: t,
}
}
pub fn get_ref(&self) -> &T {
&self.inner
}
pub fn get_mut(&mut self) -> &mut T {
&mut self.inner
}
pub fn into_inner(self) -> T {
self.inner
}
pub fn start(&self) -> usize {
self.range.start
}
pub fn end(&self) -> usize {
self.range.end
}
pub fn set_start(&mut self, start: usize) -> &mut Window<T> {
assert!(start <= self.inner.as_ref().len());
assert!(start <= self.range.end);
self.range.start = start;
self
}
pub fn set_end(&mut self, end: usize) -> &mut Window<T> {
assert!(end <= self.inner.as_ref().len());
assert!(self.range.start <= end);
self.range.end = end;
self
}
}
impl<T: AsRef<[u8]>> AsRef<[u8]> for Window<T> {
fn as_ref(&self) -> &[u8] {
&self.inner.as_ref()[self.range.start..self.range.end]
}
}
impl<T: AsMut<[u8]>> AsMut<[u8]> for Window<T> {
fn as_mut(&mut self) -> &mut [u8] {
&mut self.inner.as_mut()[self.range.start..self.range.end]
}
}