8a53986961
* adds extract_* functions to CBOR library * hides Value implementation details * CBOR API fixes * README adapted to API changes
55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
# CBOR Parsing Library
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[](https://crates.io/crates/sk-cbor)
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[](https://crates.io/crates/sk-cbor)
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[](https://docs.rs/sk-cbor)
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[](https://crates.io/crates/sk-cbor)
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[](https://crates.io/crates/sk-cbor)
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This crate implements Concise Binary Object Representation (CBOR) from [RFC
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8949](https://datatracker.ietf.org/doc/html/rfc8949).
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## Usage
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```rust
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fn main() {
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// Build a CBOR object with the crate's convenience macros. Note that this
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// object is not built in canonical order.
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let map_object = cbor_map! {
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1 => cbor_array![2, 3],
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"tstr" => cbor_bytes!(vec![1, 2, 3]),
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-2 => cbor_null!(),
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3 => cbor_true!(),
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};
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println!("Object {:?}", map_object);
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// Serialize to bytes.
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let mut map_data = vec![];
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sk_cbor::writer::write(map_object, &mut map_data).unwrap();
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let hex_map_data = hex::encode(&map_data);
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// Serialized version is in canonical order.
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println!("Serializes to {}", hex_map_data);
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assert_eq!(
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hex_map_data,
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concat!(
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"a4", // 4-map
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"01", // int(1) =>
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"820203", // 2-array [2, 3],
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"03", // int(3) =>
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"f5", // true,
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"21", // nint(-2) =>
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"f6", // null,
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"6474737472", // 4-tstr "tstr" =>
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"43010203" // 3-bstr
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)
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);
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// Convert back to an object. This is different than the original object,
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// because the map is now in canonical order.
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let recovered_object = sk_cbor::reader::read(&map_data).unwrap();
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println!("Deserializes to {:?}", recovered_object);
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}
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```
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