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use rustc_serialize::hex::FromHexError;
use rlp::DecoderError;
use std::fmt;
use hash::H256;
#[derive(Debug)]
pub enum BaseDataError {
NegativelyReferencedHash(H256),
AlreadyExists(H256),
}
impl fmt::Display for BaseDataError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
BaseDataError::NegativelyReferencedHash(hash) =>
write!(f, "Entry {} removed from database more times than it was added.", hash),
BaseDataError::AlreadyExists(hash) =>
write!(f, "Committed key already exists in database: {}", hash),
}
}
}
#[derive(Debug)]
pub enum UtilError {
StdIo(::std::io::Error),
FromHex(FromHexError),
BaseData(BaseDataError),
Decoder(DecoderError),
SimpleString(String),
BadSize,
Snappy(::snappy::InvalidInput),
}
impl fmt::Display for UtilError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
UtilError::StdIo(ref err) => f.write_fmt(format_args!("{}", err)),
UtilError::FromHex(ref err) => f.write_fmt(format_args!("{}", err)),
UtilError::BaseData(ref err) => f.write_fmt(format_args!("{}", err)),
UtilError::Decoder(ref err) => f.write_fmt(format_args!("{}", err)),
UtilError::SimpleString(ref msg) => f.write_str(msg),
UtilError::BadSize => f.write_str("Bad input size."),
UtilError::Snappy(ref err) => f.write_fmt(format_args!("{}", err)),
}
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub struct Mismatch<T: fmt::Debug> {
pub expected: T,
pub found: T,
}
impl<T: fmt::Debug + fmt::Display> fmt::Display for Mismatch<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_fmt(format_args!("Expected {}, found {}", self.expected, self.found))
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub struct OutOfBounds<T: fmt::Debug> {
pub min: Option<T>,
pub max: Option<T>,
pub found: T,
}
impl<T: fmt::Debug + fmt::Display> fmt::Display for OutOfBounds<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let msg = match (self.min.as_ref(), self.max.as_ref()) {
(Some(min), Some(max)) => format!("Min={}, Max={}", min, max),
(Some(min), _) => format!("Min={}", min),
(_, Some(max)) => format!("Max={}", max),
(None, None) => "".into(),
};
f.write_fmt(format_args!("Value {} out of bounds. {}", self.found, msg))
}
}
impl From<FromHexError> for UtilError {
fn from(err: FromHexError) -> UtilError {
UtilError::FromHex(err)
}
}
impl From<BaseDataError> for UtilError {
fn from(err: BaseDataError) -> UtilError {
UtilError::BaseData(err)
}
}
impl From<::std::io::Error> for UtilError {
fn from(err: ::std::io::Error) -> UtilError {
UtilError::StdIo(err)
}
}
impl From<::rlp::DecoderError> for UtilError {
fn from(err: ::rlp::DecoderError) -> UtilError {
UtilError::Decoder(err)
}
}
impl From<String> for UtilError {
fn from(err: String) -> UtilError {
UtilError::SimpleString(err)
}
}
impl From<::snappy::InvalidInput> for UtilError {
fn from(err: ::snappy::InvalidInput) -> UtilError {
UtilError::Snappy(err)
}
}