114 lines
3.4 KiB
Rust
114 lines
3.4 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Recursive Length Prefix serialization crate.
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//!
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//! Allows encoding, decoding, and view onto rlp-slice
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//!
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//!# What should you use when?
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//!
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//!### Use `encode` function when:
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//! * You want to encode something inline.
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//! * You do not work on big set of data.
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//! * You want to encode whole data structure at once.
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//!
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//!### Use `decode` function when:
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//! * You want to decode something inline.
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//! * You do not work on big set of data.
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//! * You want to decode whole rlp at once.
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//!
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//!### Use `RlpStream` when:
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//! * You want to encode something in portions.
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//! * You encode a big set of data.
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//!
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//!### Use `Rlp` when:
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//! * You are working on trusted data (not corrupted).
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//! * You want to get view onto rlp-slice.
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//! * You don't want to decode whole rlp at once.
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//!
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//!### Use `UntrustedRlp` when:
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//! * You are working on untrusted data (~corrupted).
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//! * You need to handle data corruption errors.
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//! * You are working on input data.
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//! * You want to get view onto rlp-slice.
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//! * You don't want to decode whole rlp at once.
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pub mod rlptraits;
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mod rlperrors;
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mod rlpin;
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mod untrusted_rlp;
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mod rlpstream;
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mod rlpcompression;
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mod commonrlps;
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mod bytes;
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#[cfg(test)]
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mod tests;
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pub use self::rlperrors::DecoderError;
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pub use self::rlptraits::{Decoder, Decodable, View, Stream, Encodable, Encoder, RlpEncodable, RlpDecodable, Compressible};
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pub use self::untrusted_rlp::{UntrustedRlp, UntrustedRlpIterator, PayloadInfo, Prototype};
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pub use self::rlpin::{Rlp, RlpIterator};
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pub use self::rlpstream::RlpStream;
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pub use self::rlpcompression::RlpType;
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extern crate ethcore_bigint as bigint;
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extern crate elastic_array;
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extern crate rustc_serialize;
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#[macro_use]
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extern crate lazy_static;
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use elastic_array::ElasticArray1024;
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/// The RLP encoded empty data (used to mean "null value").
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pub const NULL_RLP: [u8; 1] = [0x80; 1];
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/// The RLP encoded empty list.
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pub const EMPTY_LIST_RLP: [u8; 1] = [0xC0; 1];
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/// Shortcut function to decode trusted rlp
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///
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/// ```rust
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/// extern crate rlp;
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///
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/// fn main () {
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/// let data = vec![0xc8, 0x83, b'c', b'a', b't', 0x83, b'd', b'o', b'g'];
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/// let animals: Vec<String> = rlp::decode(&data);
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/// assert_eq!(animals, vec!["cat".to_string(), "dog".to_string()]);
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/// }
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/// ```
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pub fn decode<T>(bytes: &[u8]) -> T where T: RlpDecodable {
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let rlp = Rlp::new(bytes);
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rlp.as_val()
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}
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/// Shortcut function to encode structure into rlp.
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///
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/// ```rust
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/// extern crate rlp;
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///
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/// fn main () {
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/// let animal = "cat";
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/// let out = rlp::encode(&animal).to_vec();
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/// assert_eq!(out, vec![0x83, b'c', b'a', b't']);
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/// }
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/// ```
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pub fn encode<E>(object: &E) -> ElasticArray1024<u8> where E: RlpEncodable {
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let mut stream = RlpStream::new();
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stream.append(object);
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stream.drain()
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}
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