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//! Error type returned by every parser in this crate.
use thiserror::Error;
/// Crate-wide result alias.
pub type Result<T> = core::result::Result<T, Error>;
/// Error variants that parsers + builders can return.
///
/// Spec references inside `#[error(...)]` strings quote clauses from
/// ETSI EN 300 468 v1.19.1 where applicable.
#[derive(Debug, Error, PartialEq, Eq, Clone)]
#[non_exhaustive]
pub enum Error {
/// Input buffer was shorter than the smallest valid encoding for the type.
#[error(transparent)]
BufferTooShort(#[from] broadcast_common::error::BufferTooShort),
/// CRC-32 validation failed for a table section.
#[error(transparent)]
CrcMismatch(#[from] broadcast_common::error::CrcMismatch),
/// `table_id` byte doesn't match any expected value for the parser invoked.
#[error("unexpected table_id {table_id:#04x} for {what} (expected one of {expected:?})")]
UnexpectedTableId {
/// Byte value actually read.
table_id: u8,
/// Table names or parser expecting it.
what: &'static str,
/// The permitted set.
expected: &'static [u8],
},
/// Descriptor payload failed semantic validation.
#[error("invalid descriptor (tag {tag:#04x}): {reason}")]
InvalidDescriptor {
/// Descriptor tag being parsed.
tag: u8,
/// Specific failure reason.
reason: &'static str,
},
/// A decoded value passed to a `set_*` accessor could not be encoded to the
/// field's fixed wire representation (e.g. a duration ≥ 100 hours, or a date
/// outside the 16-bit MJD range).
#[error("value out of range for {field}: {reason}")]
ValueOutOfRange {
/// Field being set.
field: &'static str,
/// Why the value is not representable.
reason: &'static str,
},
/// A `section_length` declared more bytes than the containing buffer could hold.
#[error("section_length {declared} exceeds remaining buffer ({available} bytes)")]
SectionLengthOverflow {
/// Length bytes declared inside the section header.
declared: usize,
/// Bytes actually available after the header.
available: usize,
},
/// A reserved or fixed-value bit group was not in the state a spec clause
/// requires. Most parsers are permissive about reserved bits; this is only
/// emitted when a clause specifically requires a value.
#[error(transparent)]
ReservedBits(#[from] broadcast_common::error::ReservedBits),
/// A field held a value its spec clause forbids.
#[error(transparent)]
InvalidValue(#[from] broadcast_common::error::InvalidValue),
/// A field is structurally invalid with no single offending number.
#[error(transparent)]
InvalidField(#[from] broadcast_common::error::InvalidField),
/// Write buffer passed to `serialize_into` was smaller than `serialized_len()`.
#[error(transparent)]
OutputBufferTooSmall(#[from] broadcast_common::error::OutputBufferTooSmall),
/// A fixed marker did not match (TS sync byte, expected `0x47`).
#[error(transparent)]
InvalidSync(#[from] broadcast_common::error::InvalidSync),
/// A serializer's length or count value did not fit its wire field.
/// Returned instead of silently narrowing (`as u8`/`as u16`/masking),
/// which would emit a misframed section (see #1129).
#[error(transparent)]
FieldOverflow(#[from] broadcast_common::len::FieldOverflow),
}
impl From<mpeg_ts::Error> for Error {
fn from(e: mpeg_ts::Error) -> Self {
match e {
mpeg_ts::Error::BufferTooShort(e) => Error::BufferTooShort(e),
mpeg_ts::Error::CrcMismatch(e) => Error::CrcMismatch(e),
mpeg_ts::Error::InvalidSync(e) => Error::InvalidSync(e),
mpeg_ts::Error::OutputBufferTooSmall(e) => Error::OutputBufferTooSmall(e),
mpeg_ts::Error::SectionLengthOverflow {
declared,
available,
} => Error::SectionLengthOverflow {
declared,
available,
},
// mpeg_ts::Error is #[non_exhaustive]; catch future variants generically.
_ => Error::BufferTooShort(broadcast_common::error::BufferTooShort {
need: 0,
have: 0,
what: "mpeg_ts (unknown error)",
}),
}
}
}