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use byteorder::{LittleEndian, WriteBytesExt};
use failure::{bail, Error};
use crate::{
chunks::TOKEN_XML_TAG_START,
model::{
owned::{AttributeBuf, OwnedBuf},
AttributeTrait, TagStart,
},
};
#[derive(Debug)]
pub struct XmlTagStartBuf {
attributes: Vec<AttributeBuf>,
name: u32,
namespace: u32,
line: u32,
field1: u32,
field2: u32,
class: u32,
}
impl XmlTagStartBuf {
pub fn new(line: u32, field1: u32, namespace: u32, name: u32, field2: u32, class: u32) -> Self {
Self {
attributes: Vec::new(),
name,
namespace,
line,
field1,
field2,
class,
}
}
pub fn add_attribute(&mut self, attribute: AttributeBuf) {
self.attributes.push(attribute);
}
}
impl TagStart for XmlTagStartBuf {
type Attribute = AttributeBuf;
fn get_line(&self) -> Result<u32, Error> {
Ok(self.line)
}
fn get_field1(&self) -> Result<u32, Error> {
Ok(self.field1)
}
fn get_namespace_index(&self) -> Result<u32, Error> {
Ok(self.namespace)
}
fn get_element_name_index(&self) -> Result<u32, Error> {
Ok(self.name)
}
fn get_field2(&self) -> Result<u32, Error> {
Ok(self.field2)
}
fn get_attributes_amount(&self) -> Result<u32, Error> {
Ok(self.attributes.len() as u32)
}
fn get_class(&self) -> Result<u32, Error> {
Ok(self.class)
}
fn get_attribute(&self, index: u32) -> Result<Self::Attribute, Error> {
if let Some(attr) = self.attributes.get(index as usize) {
Ok(*attr)
} else {
bail!("requested attribute out of bounds")
}
}
}
impl OwnedBuf for XmlTagStartBuf {
fn get_token(&self) -> u16 {
TOKEN_XML_TAG_START
}
fn get_body_data(&self) -> Result<Vec<u8>, Error> {
let mut out = Vec::new();
out.write_u32::<LittleEndian>(self.namespace)?;
out.write_u32::<LittleEndian>(self.name)?;
out.write_u32::<LittleEndian>(self.field2)?;
out.write_u32::<LittleEndian>(self.attributes.len() as u32)?;
out.write_u32::<LittleEndian>(self.class)?;
for a in &self.attributes {
out.write_u32::<LittleEndian>(a.get_namespace()?)?;
out.write_u32::<LittleEndian>(a.get_name()?)?;
out.write_u32::<LittleEndian>(a.get_class()?)?;
out.write_u32::<LittleEndian>(a.get_resource_value()?)?;
out.write_u32::<LittleEndian>(a.get_data()?)?;
}
Ok(out)
}
fn get_header(&self) -> Result<Vec<u8>, Error> {
let mut out = Vec::new();
out.write_u32::<LittleEndian>(self.line)?;
out.write_u32::<LittleEndian>(self.field1)?;
Ok(out)
}
}
#[cfg(test)]
mod tests {
use super::{AttributeTrait, OwnedBuf, TagStart, XmlTagStartBuf};
use crate::{
chunks::XmlTagStartWrapper, model::owned::AttributeBuf, raw_chunks::EXAMPLE_TAG_START,
test::compare_chunks,
};
#[test]
fn it_can_generate_a_chunk_with_the_given_data() {
let attribute1 = AttributeBuf::new(1, 2, 3, 5, 6);
let attribute2 = AttributeBuf::new(7, 8, 9, 11, 12);
let mut tag_start = XmlTagStartBuf::new(10, 22, 0xFFFF_FFFF, 7, 5, 3);
tag_start.add_attribute(attribute1);
tag_start.add_attribute(attribute2);
assert_eq!(10, tag_start.get_line().unwrap());
assert_eq!(22, tag_start.get_field1().unwrap());
assert_eq!(7, tag_start.get_element_name_index().unwrap());
assert_eq!(5, tag_start.get_field2().unwrap());
assert_eq!(3, tag_start.get_class().unwrap());
assert_eq!(2, tag_start.get_attributes_amount().unwrap());
assert_eq!(0xFFFF_FFFF, tag_start.get_namespace_index().unwrap());
let first_attribute = tag_start.get_attribute(0).unwrap();
assert_eq!(1, first_attribute.get_namespace().unwrap());
let third_attribute = tag_start.get_attribute(2);
assert!(third_attribute.is_err());
}
#[test]
fn identity() {
let raw = EXAMPLE_TAG_START;
let wrapper = XmlTagStartWrapper::new(raw);
let owned = wrapper.to_buffer().unwrap();
let new_raw = owned.to_vec().unwrap();
compare_chunks(&raw, &new_raw);
}
}