use std::{error::Error, fmt};
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct EncodingError(pub usize);
impl fmt::Display for EncodingError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "invalid length ({})", self.0)
}
}
impl Error for EncodingError {
fn cause(&self) -> Option<&dyn Error> {
None
}
fn description(&self) -> &str {
"invalid length"
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum DecodingError {
InvalidLength(usize),
NoPrefix,
InvalidPrefix(String),
ChecksumFailed(u64),
InvalidChar(char),
InvalidVersion(u8),
MixedCase,
Other(String),
}
impl fmt::Display for DecodingError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
DecodingError::ChecksumFailed(actual) => {
write!(f, "invalid checksum (actual {} != 0)", actual)
}
DecodingError::InvalidChar(index) => write!(f, "invalid char ({})", index),
DecodingError::NoPrefix => write!(f, "zero or multiple prefixes"),
DecodingError::MixedCase => write!(f, "mixed case string"),
DecodingError::InvalidVersion(c) => write!(f, "invalid version byte ({})", c),
DecodingError::InvalidPrefix(prefix) => write!(f, "invalid prefix ({})", prefix),
DecodingError::InvalidLength(length) => write!(f, "invalid length ({})", length),
DecodingError::Other(error) => write!(f, "other error ({})", error),
}
}
}
impl Error for DecodingError {
fn cause(&self) -> Option<&dyn Error> {
None
}
fn description(&self) -> &str {
match *self {
DecodingError::ChecksumFailed { .. } => "invalid checksum",
DecodingError::InvalidChar(_) => "invalid char",
DecodingError::NoPrefix => "zero or multiple prefixes",
DecodingError::MixedCase => "mixed case string",
DecodingError::InvalidVersion(_) => "invalid version byte",
DecodingError::InvalidPrefix(_) => "invalid prefix",
DecodingError::InvalidLength(_) => "invalid length",
DecodingError::Other(_) => "other",
}
}
}