xavier_internal/deserialize/
instructions.rs

1use quick_xml::events::Event;
2use quick_xml::Reader;
3use crate::deserialize::error::PError;
4
5#[macro_export]
6macro_rules! instructions {
7    ($expr:expr, $tag:expr) => { xavier::deserialize::instructions::parse($expr, $tag) };
8}
9
10pub fn parse(xml: &str, function: fn(tag: String, instruction: String, params: String) -> ()) -> Result<(), PError> {
11    let mut reader = Reader::from_str(xml);
12    let mut stack: Vec<String> = vec![];
13    loop {
14        match reader.read_event() {
15            Err(error) => { return Err(PError::new(&format!("Error at position {}: {:?}", reader.buffer_position(), error))) },
16            Ok(Event::Eof) => { break },
17            Ok(Event::Start(event)) => {
18                for context in &stack {
19                    if let Some(context) = pi_obj(&context) {
20                        function(String::from_utf8(event.name().0.to_vec())?, context.0.to_string(), context.1.to_string());
21                    }
22                }
23                stack.clear()
24            },
25            Ok(Event::End(_)) => {},
26            Ok(Event::Empty(_)) => {},
27            Ok(Event::Decl(_)) => {},
28            Ok(Event::PI(event)) => {
29                stack.push(String::from_utf8(event.to_vec())?);
30            }
31            Ok(Event::DocType(_)) => {},
32            Ok(Event::Text(_)) => {},
33            Ok(Event::Comment(_)) => {},
34            Ok(Event::CData(_)) => {},
35        };
36    };
37    Ok(())
38}
39
40fn pi_obj(input: &str) -> Option<(String, String)> {
41
42    let start_index = match input.find(' ') {
43        Some(idx) => idx,
44        None => {
45            return None;
46        }
47    };
48    let name = &input[0..start_index];
49    let params = &input[start_index + 1..input.len()];
50    Some((name.to_string(), params.to_string()))
51}
52
53
54
xavier_internal/deserialize/instructions.rs

xavier_internal/deserialize/
instructions.rs
