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use std::collections::hash_map;
use std::iter::Iterator;
use crate::headers::{HeaderName, HeaderValue, HeaderValues};
#[derive(Debug)]
pub struct Values<'a> {
pub(super) inner: Option<hash_map::Values<'a, HeaderName, HeaderValues>>,
slot: Option<&'a HeaderValues>,
cursor: usize,
}
impl<'a> Values<'a> {
pub(crate) fn new(inner: hash_map::Values<'a, HeaderName, HeaderValues>) -> Self {
Self {
inner: Some(inner),
slot: None,
cursor: 0,
}
}
pub(crate) fn new_values(values: &'a HeaderValues) -> Self {
Self {
inner: None,
slot: Some(values),
cursor: 0,
}
}
}
impl<'a> Iterator for Values<'a> {
type Item = &'a HeaderValue;
fn next(&mut self) -> Option<Self::Item> {
loop {
if self.slot.is_none() {
let next = match self.inner.as_mut() {
Some(inner) => inner.next()?,
None => return None,
};
self.cursor = 0;
self.slot = Some(next);
}
match self.slot.unwrap().get(self.cursor) {
Some(item) => {
self.cursor += 1;
return Some(item);
}
None => {
self.slot = None;
continue;
}
}
}
}
#[inline]
fn size_hint(&self) -> (usize, Option<usize>) {
match self.inner.as_ref() {
Some(inner) => inner.size_hint(),
None => (0, None),
}
}
}