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use quick_xml::events::Event;
use quick_xml::Reader;
pub fn count_highway_crossings(buffer: &[u8]) -> usize {
let mut reader = Reader::from_reader(buffer);
reader.config_mut().check_end_names = false;
let mut count = 0usize;
let mut in_node = false;
loop {
match reader.read_event() {
Ok(Event::Eof) => break,
Ok(Event::Start(e)) if e.name().as_ref() == b"node" => {
in_node = true;
}
Ok(Event::End(e)) if e.name().as_ref() == b"node" => {
in_node = false;
}
Ok(Event::Start(e)) | Ok(Event::Empty(e))
if in_node && e.name().as_ref() == b"tag" =>
{
let mut attrs = e.attributes();
if attrs.next().unwrap().unwrap().value.as_ref() == b"highway"
&& attrs.next().unwrap().unwrap().value.as_ref() == b"crossing" {
count += 1;
}
}
Ok(_) => {}
Err(_) => break,
}
}
count
}
pub fn count_highway_crossings_cheat_and_early_out(buffer: &[u8]) -> usize {
let mut reader = Reader::from_reader(buffer);
reader.config_mut().check_end_names = false;
let mut count = 0usize;
loop {
match reader.read_event() {
Ok(Event::Eof) => break,
Ok(Event::Start(e)) | Ok(Event::Empty(e))
if e.name().as_ref() == b"tag" =>
{
let mut attrs = e.attributes();
if attrs.next().unwrap().unwrap().value.as_ref() == b"highway"
&& attrs.next().unwrap().unwrap().value.as_ref() == b"crossing" {
count += 1;
}
}
Ok(Event::Start(e)) | Ok(Event::Empty(e))
if e.name().as_ref() == b"way" =>
{
break;
}
Ok(_) => {}
Err(_) => break,
}
}
count
}
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