dvb_t2mi/
error.rs

1//! Error type returned by every parser in this crate.
2
3use thiserror::Error;
4
5/// Crate-wide result alias.
6pub type Result<T> = core::result::Result<T, Error>;
7
8/// Error variants that parsers + builders can return.
9///
10/// Spec references inside `#[error(...)]` strings quote clauses from
11/// ETSI TS 102 773 v1.4.1 where applicable.
12#[derive(Debug, Error, PartialEq, Eq)]
13#[non_exhaustive]
14pub enum Error {
15    /// Input buffer was shorter than the smallest valid encoding for the type.
16    #[error("buffer too short: need {need} bytes, have {have} (while parsing {what})")]
17    BufferTooShort {
18        /// Bytes required to proceed.
19        need: usize,
20        /// Bytes actually available.
21        have: usize,
22        /// Human-readable name of the type or field being parsed.
23        what: &'static str,
24    },
25
26    /// `packet_type` byte is not in Table 1 (0x00..=0x02, 0x10..=0x12, 0x20..=0x21, 0x30..=0x33).
27    #[error("invalid T2-MI packet_type {found:#04x} — reserved per ETSI TS 102 773 Table 1")]
28    InvalidPacketType {
29        /// Byte value actually read.
30        found: u8,
31    },
32
33    /// A reserved bit was not in the expected state.
34    #[error("reserved bits violation in {field}: {reason}")]
35    ReservedBitsViolation {
36        /// Where.
37        field: &'static str,
38        /// Why.
39        reason: &'static str,
40    },
41
42    /// Write buffer passed to `serialize_into` was smaller than `serialized_len()`.
43    #[error("serialize: output buffer too small — need {need}, have {have}")]
44    OutputBufferTooSmall {
45        /// Required size.
46        need: usize,
47        /// Actual size.
48        have: usize,
49    },
50
51    /// Payload length declared more bits than remaining bytes.
52    #[error(
53        "payload length mismatch: {declared_bits} bits declared, {remaining_bytes} bytes remaining"
54    )]
55    PayloadLengthMismatch {
56        /// Declared payload_len_bits from header.
57        declared_bits: u16,
58        /// Actual remaining bytes.
59        remaining_bytes: usize,
60    },
61
62    /// CRC-32 validation failed.
63    #[error("CRC-32 mismatch: computed {computed:#010x}, expected {expected:#010x}")]
64    CrcMismatch {
65        /// CRC we calculated over the payload bytes.
66        computed: u32,
67        /// CRC carried at the end of the packet.
68        expected: u32,
69    },
70}
dvb_t2mi/error.rs

dvb_t2mi/
error.rs
