esvm_rlp/error.rs
1// Copyright 2015-2017 Parity Technologies
2//
3// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6// option. This file may not be copied, modified, or distributed
7// except according to those terms.
8
9use std::fmt;
10use std::error::Error as StdError;
11
12#[derive(Debug, PartialEq, Eq)]
13/// Error concerning the RLP decoder.
14pub enum DecoderError {
15 /// Data has additional bytes at the end of the valid RLP fragment.
16 RlpIsTooBig,
17 /// Data has too few bytes for valid RLP.
18 RlpIsTooShort,
19 /// Expect an encoded list, RLP was something else.
20 RlpExpectedToBeList,
21 /// Expect encoded data, RLP was something else.
22 RlpExpectedToBeData,
23 /// Expected a different size list.
24 RlpIncorrectListLen,
25 /// Data length number has a prefixed zero byte, invalid for numbers.
26 RlpDataLenWithZeroPrefix,
27 /// List length number has a prefixed zero byte, invalid for numbers.
28 RlpListLenWithZeroPrefix,
29 /// Non-canonical (longer than necessary) representation used for data or list.
30 RlpInvalidIndirection,
31 /// Declared length is inconsistent with data specified after.
32 RlpInconsistentLengthAndData,
33 /// Custom rlp decoding error.
34 Custom(&'static str),
35}
36
37impl StdError for DecoderError {
38 fn description(&self) -> &str {
39 "builder error"
40 }
41}
42
43impl fmt::Display for DecoderError {
44 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
45 fmt::Debug::fmt(&self, f)
46 }
47}