lutra_bin/
typed_data.rs

1//! Typed data format
2//!
3//! Utilities for combinding data with types into a single serialized buffer.
4//!
5//! It is serialized with the following schema:
6//! ```lt
7//! type TypedData: {ty: ir::Ty, ty_defs: [ir::TyDef], data: [uint8]}
8//! ```
9
10use crate::ir;
11use crate::vec;
12use crate::{ArrayReader, Decode, Encode, Layout, Result};
13
14pub fn data_offset() -> usize {
15    let ty_size = ir::Ty::head_size().div_ceil(8);
16
17    let ty_defs_size = <vec::Vec<ir::TyDef> as Layout>::head_size().div_ceil(8);
18
19    ty_size + ty_defs_size
20}
21
22pub fn decode(buffer: &[u8]) -> Result<(&[u8], ir::Ty, vec::Vec<ir::TyDef>)> {
23    let ty = ir::Ty::decode(buffer)?;
24    let field_size = ir::Ty::head_size().div_ceil(8);
25    let buffer = &buffer[field_size..];
26
27    let ty_defs: vec::Vec<ir::TyDef> = Decode::decode(buffer)?;
28    let field_size = <vec::Vec<ir::TyDef> as Layout>::head_size().div_ceil(8);
29    let buffer = &buffer[field_size..];
30
31    let (offset, len) = ArrayReader::<&[u8]>::read_head(buffer);
32    let data = &buffer[offset..offset + len];
33
34    Ok((data, ty, ty_defs))
35}
36
37pub fn encode(
38    buffer: &mut bytes::BytesMut,
39    data: &[u8],
40    ty: &ir::Ty,
41    ty_defs: &[ir::TyDef],
42) -> Result<()> {
43    let ty_res = ty.encode_head(buffer);
44    let ty_defs_res = ty_defs.encode_head(buffer);
45    let data_res = data.encode_head(buffer);
46
47    ty.encode_body(ty_res, buffer);
48    ty_defs.encode_body(ty_defs_res, buffer);
49    data.encode_body(data_res, buffer);
50
51    Ok(())
52}
lutra_bin/typed_data.rs

lutra_bin/
typed_data.rs
