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#![feature(const_generics)]
mod collection;
mod error;
mod object;
mod reader;
mod writer;
pub use ltv_derive::*;
#[derive(Debug, PartialEq, Eq)]
pub enum ByteOrder {
BE,
LE,
}
pub const DEFAULT_ED: ByteOrder = ByteOrder::BE;
pub use error::{LTVError, LTVResult};
pub use object::{LTVItem, LTVItemMany, LTVObject, LTVObjectConvertable, LTVObjectGroup};
pub use reader::LTVReader;
pub use writer::LTVContainer;
pub use writer::LTVWriter;
pub type LTVWriterBE<W, const LENGTH_SIZE: usize> = LTVWriter<W, { ByteOrder::BE }, LENGTH_SIZE>;
pub type LTVWriterLE<W, const LENGTH_SIZE: usize> = LTVWriter<W, { ByteOrder::LE }, LENGTH_SIZE>;
pub type LTVReaderBE<'a, const LENGTH_SIZE: usize> = LTVReader<'a, { ByteOrder::BE }, LENGTH_SIZE>;
pub type LTVReaderLE<'a, const LENGTH_SIZE: usize> = LTVReader<'a, { ByteOrder::LE }, LENGTH_SIZE>;
pub fn get_ltv<T: LTVItem<ED>, const ED: ByteOrder>(obj: &T) -> Vec<u8> {
obj.to_ltv()
}
#[cfg(test)]
mod tests {
use crate::*;
#[derive(Debug, PartialEq, Eq)]
struct BasicLTV {
field1: u8,
}
impl<'a> LTVItem<{ ByteOrder::BE }> for BasicLTV {
fn from_ltv(_: u8, data: &[u8]) -> LTVResult<Self> {
let reader = LTVReaderLE::<1>::new(data);
Ok(BasicLTV {
field1: reader.get_item::<u8>(0x01)?,
})
}
fn to_ltv(&self) -> Vec<u8> {
let mut writer = LTVWriterLE::<_, 1>::new(Vec::with_capacity(3));
writer.write_ltv(0x01, &self.field1).ok();
writer.into_inner()
}
}
#[test]
fn writer_to_reader() {
let original = BasicLTV { field1: 0x35 };
let buffer = original.to_ltv();
let out = BasicLTV::from_ltv(0x01, &buffer).unwrap();
assert_eq!(original, out);
assert_eq!(&buffer, &[2, 0x01, 0x35]);
}
#[derive(Debug, PartialEq, Eq)]
struct LTVNoBody {
}
impl<'a> LTVItem<{ ByteOrder::LE }> for LTVNoBody {
fn from_ltv(_: u8, data: &[u8]) -> LTVResult<Self> {
let _reader = LTVReaderLE::<1>::new(data);
Ok(LTVNoBody{})
}
fn to_ltv(&self) -> Vec<u8> {
Vec::new()
}
}
impl LTVObject<2> for LTVNoBody {
const OBJECT_ID: u8 = 3;
}
#[test]
fn no_body_ltv() {
let data = vec![
1,
0,
3
];
let original = LTVNoBody::from_ltv_object(&data).unwrap();
assert_eq!(original, LTVNoBody{});
assert_eq!(
original.to_ltv_object(),
data
);
}
}