zerodds_types/
error.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright 2026 ZeroDDS Contributors
3//! Fehlertypen fuer zerodds-types.
4
5use core::fmt;
6
7use zerodds_cdr::{DecodeError, EncodeError};
8
9/// Fehler beim Encoden/Decoden von TypeObject / TypeIdentifier.
10#[derive(Debug, Clone, PartialEq, Eq)]
11#[non_exhaustive]
12pub enum TypeCodecError {
13    /// Wire-Encode-Fehler aus dem CDR-Layer.
14    Encode(EncodeError),
15    /// Wire-Decode-Fehler.
16    Decode(DecodeError),
17    /// Unbekannter TypeKind-Diskriminator beim Decoden.
18    UnknownTypeKind {
19        /// Tatsaechlich gelesener Byte-Wert.
20        kind: u8,
21    },
22}
23
24impl fmt::Display for TypeCodecError {
25    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
26        match self {
27            Self::Encode(e) => write!(f, "type codec encode error: {e}"),
28            Self::Decode(e) => write!(f, "type codec decode error: {e}"),
29            Self::UnknownTypeKind { kind } => {
30                write!(f, "unknown TypeKind discriminator 0x{kind:02x}")
31            }
32        }
33    }
34}
35
36#[cfg(feature = "std")]
37extern crate std;
38
39#[cfg(feature = "std")]
40impl std::error::Error for TypeCodecError {}
41
42impl From<EncodeError> for TypeCodecError {
43    fn from(e: EncodeError) -> Self {
44        Self::Encode(e)
45    }
46}
47
48impl From<DecodeError> for TypeCodecError {
49    fn from(e: DecodeError) -> Self {
50        Self::Decode(e)
51    }
52}
53
54#[cfg(test)]
55mod tests {
56    use super::*;
57    use alloc::string::ToString;
58
59    #[test]
60    fn display_unknown_type_kind_hex_formatted() {
61        let e = TypeCodecError::UnknownTypeKind { kind: 0xAB };
62        let s = e.to_string();
63        assert!(s.contains("0xab") || s.contains("0xAB"), "got: {s}");
64    }
65
66    #[test]
67    fn from_encode_and_decode_error() {
68        let enc = EncodeError::ValueOutOfRange { message: "test" };
69        let e1 = TypeCodecError::from(enc);
70        assert!(matches!(e1, TypeCodecError::Encode(_)));
71
72        let dec = DecodeError::UnexpectedEof {
73            needed: 4,
74            offset: 0,
75        };
76        let e2 = TypeCodecError::from(dec);
77        assert!(matches!(e2, TypeCodecError::Decode(_)));
78    }
79
80    #[test]
81    fn display_encode_decode_variants_dont_panic() {
82        let _ = TypeCodecError::Encode(EncodeError::ValueOutOfRange { message: "x" }).to_string();
83        let _ = TypeCodecError::Decode(DecodeError::UnexpectedEof {
84            needed: 1,
85            offset: 2,
86        })
87        .to_string();
88    }
89}
zerodds_types/error.rs

zerodds_types/
error.rs
