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