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use std::error::Error as StdError;
use std::fmt;
use std::io;
use std::result;
use std::str;
use std::str::Utf8Error;
use protobuf::ProtobufError;
pub(crate) fn new_error(kind: ErrorKind) -> Error {
Error(Box::new(kind))
}
pub(crate) fn new_blob_error(kind: BlobError) -> Error {
Error(Box::new(ErrorKind::Blob(kind)))
}
pub(crate) fn new_protobuf_error(err: ProtobufError, location: &'static str) -> Error {
Error(Box::new(ErrorKind::Protobuf { err, location }))
}
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug)]
pub struct Error(Box<ErrorKind>);
impl Error {
pub fn kind(&self) -> &ErrorKind {
&self.0
}
pub fn into_kind(self) -> ErrorKind {
*self.0
}
}
#[derive(Debug)]
pub enum ErrorKind {
Io(io::Error),
Protobuf {
err: ProtobufError,
location: &'static str,
},
StringtableUtf8 { err: Utf8Error, index: usize },
StringtableIndexOutOfBounds { index: usize },
Blob(BlobError),
#[doc(hidden)]
__Nonexhaustive,
}
#[derive(Debug)]
pub enum BlobError {
InvalidHeaderSize,
HeaderTooBig {
size: u64,
},
MessageTooBig {
size: u64,
},
Empty,
#[doc(hidden)]
__Nonexhaustive,
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
new_error(ErrorKind::Io(err))
}
}
impl From<Error> for io::Error {
fn from(err: Error) -> io::Error {
io::Error::new(io::ErrorKind::Other, err)
}
}
impl StdError for Error {
fn description(&self) -> &str {
match *self.0 {
ErrorKind::Io(ref err, ..) => {
use std::io::ErrorKind;
match err.kind() {
ErrorKind::NotFound => "io error: not found",
ErrorKind::PermissionDenied => "io error: permission denied",
ErrorKind::ConnectionRefused => "io error: connection refused",
ErrorKind::ConnectionReset => "io error: connection reset",
ErrorKind::ConnectionAborted => "io error: connection aborted",
ErrorKind::NotConnected => "io error: not connected",
ErrorKind::AddrInUse => "io error: address in use",
ErrorKind::AddrNotAvailable => "io error: address not available",
ErrorKind::BrokenPipe => "io error: broken pipe",
ErrorKind::AlreadyExists => "io error: already exists",
ErrorKind::WouldBlock => "io error: would block",
ErrorKind::InvalidInput => "io error: invalid input",
ErrorKind::InvalidData => "io error: invalid data",
ErrorKind::TimedOut => "io error: timed out",
ErrorKind::WriteZero => "io error: write zero",
ErrorKind::Interrupted => "io error: interrupted",
ErrorKind::Other => "io error: other",
ErrorKind::UnexpectedEof => "io error: unexpected EOF",
_ => "io error",
}
}
ErrorKind::Protobuf { .. } => "protobuf error",
ErrorKind::StringtableUtf8 { .. } => "UTF-8 error in stringtable",
ErrorKind::StringtableIndexOutOfBounds { .. } => "stringtable index out of bounds",
ErrorKind::Blob(BlobError::InvalidHeaderSize) => {
"blob header size could not be decoded"
}
ErrorKind::Blob(BlobError::HeaderTooBig { .. }) => "blob header is too big",
ErrorKind::Blob(BlobError::MessageTooBig { .. }) => "blob message is too big",
ErrorKind::Blob(BlobError::Empty) => "blob is missing fields 'raw' and 'zlib_data",
_ => unreachable!(),
}
}
fn cause(&self) -> Option<&dyn StdError> {
match *self.0 {
ErrorKind::Io(ref err) => Some(err),
ErrorKind::Protobuf { ref err, .. } => Some(err),
ErrorKind::StringtableUtf8 { ref err, .. } => Some(err),
ErrorKind::StringtableIndexOutOfBounds { .. } => None,
ErrorKind::Blob(BlobError::InvalidHeaderSize) => None,
ErrorKind::Blob(BlobError::HeaderTooBig { .. }) => None,
ErrorKind::Blob(BlobError::MessageTooBig { .. }) => None,
ErrorKind::Blob(BlobError::Empty) => None,
_ => unreachable!(),
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self.0 {
ErrorKind::Io(ref err) => err.fmt(f),
ErrorKind::Protobuf { ref err, location } => {
write!(f, "protobuf error at '{}': {}", location, err)
}
ErrorKind::StringtableUtf8 { ref err, index } => {
write!(f, "invalid UTF-8 at string table index {}: {}", index, err)
}
ErrorKind::StringtableIndexOutOfBounds { index } => {
write!(f, "stringtable index out of bounds: {}", index)
}
ErrorKind::Blob(BlobError::InvalidHeaderSize) => {
write!(f, "blob header size could not be decoded")
}
ErrorKind::Blob(BlobError::HeaderTooBig { size }) => {
write!(f, "blob header is too big: {} bytes", size)
}
ErrorKind::Blob(BlobError::MessageTooBig { size }) => {
write!(f, "blob message is too big: {} bytes", size)
}
ErrorKind::Blob(BlobError::Empty) => {
write!(f, "blob is missing fields 'raw' and 'zlib_data'")
}
_ => unreachable!(),
}
}
}