88 lines
2.9 KiB
Rust
88 lines
2.9 KiB
Rust
//! Rlp serialization module
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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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pub mod rlperrors;
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pub mod rlpin;
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pub mod untrusted_rlp;
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pub mod rlpstream;
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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};
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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,RlpStandard};
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use super::hash::H256;
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pub const NULL_RLP: [u8; 1] = [0x80; 1];
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pub const EMPTY_LIST_RLP: [u8; 1] = [0xC0; 1];
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pub const SHA3_NULL_RLP: H256 = H256( [0x56, 0xe8, 0x1f, 0x17, 0x1b, 0xcc, 0x55, 0xa6, 0xff, 0x83, 0x45, 0xe6, 0x92, 0xc0, 0xf8, 0x6e, 0x5b, 0x48, 0xe0, 0x1b, 0x99, 0x6c, 0xad, 0xc0, 0x01, 0x62, 0x2f, 0xb5, 0xe3, 0x63, 0xb4, 0x21] );
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pub const SHA3_EMPTY_LIST_RLP: H256 = H256( [0x1d, 0xcc, 0x4d, 0xe8, 0xde, 0xc7, 0x5d, 0x7a, 0xab, 0x85, 0xb5, 0x67, 0xb6, 0xcc, 0xd4, 0x1a, 0xd3, 0x12, 0x45, 0x1b, 0x94, 0x8a, 0x74, 0x13, 0xf0, 0xa1, 0x42, 0xfd, 0x40, 0xd4, 0x93, 0x47] );
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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 ethcore_util as util;
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/// use util::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> = 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: Decodable {
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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 ethcore_util as util;
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/// use util::rlp::*;
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///
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/// fn main () {
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/// let animals = vec!["cat", "dog"];
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/// let out = encode(&animals);
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/// assert_eq!(out, vec![0xc8, 0x83, b'c', b'a', b't', 0x83, b'd', b'o', b'g']);
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/// }
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/// ```
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pub fn encode<E>(object: &E) -> Vec<u8> where E: Encodable {
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let mut stream = RlpStream::new();
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stream.append(object);
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stream.out()
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}
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