1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
// Copyright 2015-2017 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![cfg_attr(not(feature = "std"), no_std)]
#![cfg_attr(not(feature = "std"), feature(alloc))]
//! Recursive Length Prefix serialization crate.
//!
//! Allows encoding, decoding, and view onto rlp-slice
//!
//!# What should you use when?
//!
//!### Use `encode` function when:
//! * You want to encode something inline.
//! * You do not work on big set of data.
//! * You want to encode whole data structure at once.
//!
//!### Use `decode` function when:
//! * You want to decode something inline.
//! * You do not work on big set of data.
//! * You want to decode whole rlp at once.
//!
//!### Use `RlpStream` when:
//! * You want to encode something in portions.
//! * You encode a big set of data.
//!
//!### Use `Rlp` when:
//! * You are working on trusted data (not corrupted).
//! * You want to get view onto rlp-slice.
//! * You don't want to decode whole rlp at once.
//!
//!### Use `UntrustedRlp` when:
//! * You are working on untrusted data (~corrupted).
//! * You need to handle data corruption errors.
//! * You are working on input data.
//! * You want to get view onto rlp-slice.
//! * You don't want to decode whole rlp at once.
extern crate byteorder;
extern crate elastic_array;
extern crate hexutil;
#[cfg(not(feature = "std"))]
extern crate alloc;
#[cfg(feature = "std")]
#[macro_use]
extern crate lazy_static;
mod traits;
mod error;
mod rlpin;
mod untrusted_rlp;
mod stream;
mod compression;
mod common;
mod impls;
#[cfg(not(feature = "std"))]use alloc::vec::Vec;
#[cfg(not(feature = "std"))]use alloc::string::String;
#[cfg(feature = "std")] use std::borrow::Borrow;
#[cfg(not(feature = "std"))] use core::borrow::Borrow;
use elastic_array::ElasticArray1024;
pub use error::DecoderError;
pub use traits::{Decodable, Encodable, Compressible};
pub use untrusted_rlp::{UntrustedRlp, UntrustedRlpIterator, PayloadInfo, Prototype};
pub use rlpin::{Rlp, RlpIterator};
pub use stream::RlpStream;
pub use compression::RlpType;
/// The RLP encoded empty data (used to mean "null value").
pub const NULL_RLP: [u8; 1] = [0x80; 1];
/// The RLP encoded empty list.
pub const EMPTY_LIST_RLP: [u8; 1] = [0xC0; 1];
/// Shortcut function to decode trusted rlp
///
/// ```rust
/// extern crate rlp;
///
/// fn main () {
/// let data = vec![0x83, b'c', b'a', b't'];
/// let animal: String = rlp::decode(&data);
/// assert_eq!(animal, "cat".to_owned());
/// }
/// ```
pub fn decode<T>(bytes: &[u8]) -> T where T: Decodable {
let rlp = Rlp::new(bytes);
rlp.as_val()
}
pub fn decode_list<T>(bytes: &[u8]) -> Vec<T> where T: Decodable {
let rlp = Rlp::new(bytes);
rlp.as_list()
}
/// Shortcut function to encode structure into rlp.
///
/// ```rust
/// extern crate rlp;
///
/// fn main () {
/// let animal = "cat";
/// let out = rlp::encode(&animal).to_vec();
/// assert_eq!(out, vec![0x83, b'c', b'a', b't']);
/// }
/// ```
pub fn encode<E>(object: &E) -> ElasticArray1024<u8> where E: Encodable {
let mut stream = RlpStream::new();
stream.append(object);
stream.drain()
}
pub fn encode_list<E, K>(object: &[K]) -> ElasticArray1024<u8> where E: Encodable, K: Borrow<E> {
let mut stream = RlpStream::new();
stream.append_list(object);
stream.drain()
}