facet-xdr

XDR (External Data Representation) format support via facet-format.

XDR is a binary format defined in RFC 4506 for encoding structured data. It is primarily used in Sun RPC (ONC RPC) protocols.

Key characteristics:

• Big-endian byte order
• Fixed-size integers (4 bytes for i32/u32, 8 bytes for i64/u64)
• No support for i128/u128
• Strings are length-prefixed with 4-byte aligned padding
• Arrays have explicit length prefixes

Serialization

use facet::Facet;
use facet_xdr::to_vec;

#[derive(Facet)]
struct Point { x: i32, y: i32 }

let point = Point { x: 10, y: 20 };
let bytes = to_vec(&point).unwrap();

Deserialization

use facet::Facet;
use facet_xdr::from_slice;

#[derive(Facet, Debug, PartialEq)]
struct Point { x: i32, y: i32 }

// XDR encoding of Point { x: 10, y: 20 }
let bytes = &[0, 0, 0, 10, 0, 0, 0, 20];
let point: Point = from_slice(bytes).unwrap();
assert_eq!(point.x, 10);
assert_eq!(point.y, 20);