Red Bear OS
56 lines
1.4 KiB
Rust
56 lines
1.4 KiB
Rust
use std::convert;
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use std::fmt;
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use std::io::Error as IOError;
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use std::result;
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use syscall::error::Error as SyscallError;
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#[derive(Debug)]
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enum ErrorType {
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Syscall(SyscallError),
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IOError(IOError),
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}
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#[derive(Debug)]
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pub struct Error {
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error_type: ErrorType,
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descr: String,
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}
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impl Error {
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pub fn from_syscall_error<S: Into<String>>(syscall_error: SyscallError, descr: S) -> Error {
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Error {
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error_type: ErrorType::Syscall(syscall_error),
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descr: descr.into(),
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}
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}
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pub fn from_io_error<S: Into<String>>(io_error: IOError, descr: S) -> Error {
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Error {
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error_type: ErrorType::IOError(io_error),
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descr: descr.into(),
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}
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}
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
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match self.error_type {
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ErrorType::Syscall(ref syscall_error) => {
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write!(f, "{}: syscall error: {}", self.descr, syscall_error)
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}
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ErrorType::IOError(ref io_error) => {
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write!(f, "{} : io error : {}", self.descr, io_error)
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}
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}
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}
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}
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impl std::error::Error for Error {}
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impl convert::From<IOError> for Error {
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fn from(e: IOError) -> Self {
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Error::from_io_error(e, "generic error")
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}
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}
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pub type Result<T> = result::Result<T, Error>;
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