prefix_hex/
error.rs

1// Copyright 2022 IOTA Stiftung
2// SPDX-License-Identifier: Apache-2.0
3
4use core::fmt;
5
6use hex::FromHexError;
7
8#[derive(Debug, PartialEq, Eq)]
9pub enum Error {
10    InvalidPrefix { c0: char, c1: char },
11    InvalidHexCharacter { c: char, index: usize },
12    InvalidStringLength,
13    InvalidStringLengthSlice { expected: usize, actual: usize },
14    OddLength,
15}
16
17#[cfg(feature = "std")]
18impl std::error::Error for Error {}
19
20impl From<FromHexError> for Error {
21    fn from(v: FromHexError) -> Error {
22        match v {
23            FromHexError::InvalidHexCharacter { c, index } => Error::InvalidHexCharacter { c, index },
24            FromHexError::InvalidStringLength => Error::InvalidStringLength,
25            FromHexError::OddLength => Error::OddLength,
26        }
27    }
28}
29
30impl fmt::Display for Error {
31    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
32        match self {
33            Error::InvalidPrefix { c0, c1 } => {
34                write!(f, "Invalid hex prefix: expected `0x` but got `{c0}{c1}`")
35            }
36            Error::InvalidHexCharacter { c, index } => {
37                write!(f, "Invalid hex character {:?} at position {}", c, index)
38            }
39            Error::InvalidStringLength => write!(f, "Invalid hex string length"),
40            Error::InvalidStringLengthSlice { expected, actual } => write!(
41                f,
42                "Invalid hex string length for slice: expected {expected} got {actual}"
43            ),
44            Error::OddLength => write!(f, "Odd number of digits in hex string"),
45        }
46    }
47}
prefix_hex/error.rs

prefix_hex/
error.rs
