# listinfo-rs
[![Latest Version](https://img.shields.io/crates/v/listinfo.svg)](https://crates.io/crates/listinfo) [![Docs](https://docs.rs/listinfo/badge.svg)](https://docs.rs/listinfo) ![License](https://img.shields.io/crates/l/listinfo)
A zero-copy MAME ListInfo format DAT files parser.
---
## Usage
listinfo-rs provides a lower-level zero-copy expression tree API as well as a more user friendly Serde deserialization API. See the crate documentation or tests for more detail examples.
```rust
#[test]
fn parse_cave_story() {
const CAVE_STORY: &str =
r#"clrmamepro (
name "Cave Story"
description "Cave Story"
version 20161204
comment "libretro | www.libretro.com"
)"#;
let document = parse::parse_document(CAVE_STORY).unwrap();
let header = document.entry("clrmamepro").unwrap().next().unwrap();
let game = document.entry("game").unwrap().next().unwrap();
let rom = game.entry_unique("rom").unwrap();
assert_eq!(
header.entry_unique("name"),
Some(&EntryData::Scalar("Cave Story"))
);
}
```
## Serde Deserialization
listinfo-rs supports deserialization with `serde`, after enabling support in `Cargo.toml`
```toml
listinfo = { version = "0.4", features = ["deserialize"] }
```
Deserialization works like any other Serde deserializer crate.
```rust
use serde::Deserialize;
#[derive(Debug, Deserialize)]
struct Header {
name: String,
description: String,
version: String,
comment: String,
}
#[derive(Debug, Deserialize)]
struct Game {
name: String,
releaseyear: u32,
developer: String,
rom: Vec<Rom>,
}
#[derive(Debug, Deserialize)]
struct Rom {
name: String,
size: u64,
// Supports serialize hex strings to byte arrays
#[serde(with = "serde_bytes")]
crc: Vec<u8>,
#[serde(with = "serde_bytes")]
md5: Vec<u8>,
#[serde(with = "serde_bytes")]
sha1: Vec<u8>,
}
#[derive(Debug, Deserialize)]
struct CaveStory {
clrmamepro: Header,
game: Vec<Game>,
}
#[test]
fn deserialize_cave_story() {
const CAVE_STORY: &str = r#"clrmamepro (
name "Cave Story"
description "Cave Story"
version 20161204
comment "libretro | www.libretro.com"
)
game (
name "Cave Story (En)"
description "Cave Story (En)"
developer "Studio Pixel"
releaseyear "2004"
rom (
name "Doukutsu.exe"
size 1478656
crc c5a2a3f6
md5 38695d3d69d7a0ada8178072dad4c58b
sha1 bb2d0441e073da9c584f23c2ad8c7ab8aac293bf
)
)
"#;
let cave_story = listinfo::de::from_str::<CaveStory>(CAVE_STORY).unwrap();
assert_eq!(cave_story.clrmamepro.name, "Cave Story");
assert_eq!(cave_story.game.first().unwrap().rom.first().unwrap().name, "Doukutsu.exe");
assert_eq!(cave_story.game.first().unwrap().rom.first().unwrap().size, 1478656);
assert_eq!(cave_story.game.first().unwrap().rom.first().unwrap().crc, &[0xc5, 0xa2, 0xa3, 0xf6]);
}
```
## `no_std`
listinfo-rs supports `no_std`, but requires `alloc`.
You can disable `std` support in `Cargo.toml`.
```toml
listinfo = { version = "0.4", default-features = false }
```