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- // Copyright (c) 2018, The Tor Project, Inc.
- // Copyright (c) 2018, isis agora lovecruft
- // See LICENSE for licensing information
- //! Various errors which may occur during protocol version parsing.
- use std::fmt;
- use std::fmt::Display;
- /// All errors which may occur during protover parsing routines.
- #[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
- #[allow(missing_docs)] // See Display impl for error descriptions
- pub enum ProtoverError {
- Overlap,
- LowGreaterThanHigh,
- Unparseable,
- ExceedsMax,
- ExceedsExpansionLimit,
- UnknownProtocol,
- ExceedsNameLimit,
- InvalidProtocol,
- }
- /// Descriptive error messages for `ProtoverError` variants.
- impl Display for ProtoverError {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- match *self {
- ProtoverError::Overlap => write!(
- f,
- "Two or more (low, high) protover ranges would overlap once expanded."
- ),
- ProtoverError::LowGreaterThanHigh => write!(
- f,
- "The low in a (low, high) protover range was greater than high."
- ),
- ProtoverError::Unparseable => write!(f, "The protover string was unparseable."),
- ProtoverError::ExceedsMax => write!(
- f,
- "The high in a (low, high) protover range exceeds u32::MAX."
- ),
- ProtoverError::ExceedsExpansionLimit => write!(
- f,
- "The protover string would exceed the maximum expansion limit."
- ),
- ProtoverError::UnknownProtocol => write!(
- f,
- "A protocol in the protover string we attempted to parse is unknown."
- ),
- ProtoverError::ExceedsNameLimit => {
- write!(f, "An unrecognised protocol name was too long.")
- }
- ProtoverError::InvalidProtocol => {
- write!(f, "A protocol name includes invalid characters.")
- }
- }
- }
- }
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