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cbor4ii
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CBOR: Concise Binary Object Representation
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# CBOR 0x(4+4)9 0x49 [](https://github.com/quininer/cbor4ii/actions) [](https://crates.io/crates/cbor4ii) [](https://github.com/quininer/cbor4ii/blob/master/LICENSE) [](https://docs.rs/cbor4ii/) “The Concise Binary Object Representation (CBOR) is a data format whose design goals include the possibility of extremely small code size, fairly small message size, and extensibility without the need for version negotiation.” see [rfc8949](https://www.rfc-editor.org/rfc/rfc8949.html) ## Compatibility The `core` mod should be fully compatible with rfc8949, but some extensions will not be implemented in this crate, such as `datetime`, `bignum`, `bigfloat`. The `serde` mod defines how Rust types should be expressed in CBOR, which is not any standard, so different crate may have inconsistent behavior. This library is intended to be compatible with `serde_cbor`, but will not follow some unreasonable designs of `serde_cbor`. * `cbor4ii` will express the unit type as an empty array instead of null. This avoids the problem that `serde_cbor` cannot distinguish between `None` and `Some(())`. see <https://github.com/pyfisch/cbor/issues/185> * `cbor4ii` does not support packed mode, and it may be implemented in future, but it may not be compatible with `serde_cbor`. If you want packed mode, you should look at `bincode`. ## Performance It is not specifically optimized for performance in implementation, but benchmarks shows that its performance is slightly better than `serde_cbor`. And it supports zero-copy deserialization and `deserialize_ignored_any` of serde, so in some scenarios it may perform better than crate that do not support such feature. ## Robustness The decode part has been fuzz tested, and it should not crash or panic during the decoding process. The decode of serde module has a depth limit to prevent stack overflow or OOM caused by specially constructed input. If you want to turn off deep inspection or adjust parameters, you can implement the `dec::Read` trait yourself. # License This project is licensed under [the MIT license](LICENSE).
