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use std::io;
use std::error::Error;
use std::fmt;
use std::str;
use wire_format::WireType;
pub type ProtobufResult<T> = Result<T, ProtobufError>;
#[derive(Debug)]
pub enum WireError {
UnexpectedEof,
UnexpectedWireType(WireType),
IncorrectTag(u32),
IncompleteMap,
IncorrectVarint,
Utf8Error,
InvalidEnumValue(i32),
TruncatedMessage,
Other,
}
#[derive(Debug)]
pub enum ProtobufError {
IoError(io::Error),
WireError(WireError),
Utf8(str::Utf8Error),
MessageNotInitialized { message: &'static str },
}
impl ProtobufError {
pub fn message_not_initialized(message: &'static str) -> ProtobufError {
ProtobufError::MessageNotInitialized { message: message }
}
}
impl fmt::Display for ProtobufError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(self, f)
}
}
impl Error for ProtobufError {
fn description(&self) -> &str {
match self {
&ProtobufError::IoError(ref e) => e.description(),
&ProtobufError::WireError(ref e) => {
match *e {
WireError::Utf8Error => "invalid UTF-8 sequence",
WireError::UnexpectedWireType(..) => "unexpected wire type",
WireError::InvalidEnumValue(..) => "invalid enum value",
WireError::IncorrectTag(..) => "incorrect tag",
WireError::IncorrectVarint => "incorrect varint",
WireError::IncompleteMap => "incomplete map",
WireError::UnexpectedEof => "unexpected EOF",
WireError::TruncatedMessage => "truncated message",
WireError::Other => "other error",
}
}
&ProtobufError::Utf8(ref e) => &e.description(),
&ProtobufError::MessageNotInitialized { .. } => "not all message fields set",
}
}
fn cause(&self) -> Option<&Error> {
match self {
&ProtobufError::IoError(ref e) => Some(e),
&ProtobufError::Utf8(ref e) => Some(e),
&ProtobufError::WireError(..) => None,
&ProtobufError::MessageNotInitialized { .. } => None,
}
}
}
impl From<io::Error> for ProtobufError {
fn from(err: io::Error) -> Self {
ProtobufError::IoError(err)
}
}
impl From<str::Utf8Error> for ProtobufError {
fn from(err: str::Utf8Error) -> Self {
ProtobufError::Utf8(err)
}
}
impl From<ProtobufError> for io::Error {
fn from(err: ProtobufError) -> Self {
match err {
ProtobufError::IoError(e) => e,
ProtobufError::WireError(e) => {
io::Error::new(io::ErrorKind::InvalidData, ProtobufError::WireError(e))
}
ProtobufError::MessageNotInitialized { message: msg } => {
io::Error::new(
io::ErrorKind::InvalidInput,
ProtobufError::MessageNotInitialized { message: msg },
)
}
e => io::Error::new(io::ErrorKind::Other, Box::new(e)),
}
}
}