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KenM76andClaude Opus 5.5
b4ba4edc7f
Review fixes from #6087: - Picture and uncompressed blocks are charged to the parse ceiling before they are copied. File-structure headers may overlap, so each structure's copy counts. The ceiling test now includes the 3-byte picture. - Schema expressions use checked multiply, add and subtract; an overflow is Malformed rather than a wrapped loop count. - Each face's triangles are counted from its entity sizes and charged before it is triangulated. - Matrix::mirrors divides each row by its largest entry before taking the determinants, so a mirror whose determinant underflows still reverses the winding. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SqmHYx8FiWM5PcsoiErgp9
47 lines
1.8 KiB
Rust
47 lines
1.8 KiB
Rust
//! The crate's error type.
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/// Why a PRC stream could not be read.
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#[derive(Debug, Clone, PartialEq, Eq, thiserror::Error)]
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#[non_exhaustive]
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pub enum PrcError {
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/// The data does not start with the `PRC` magic [WD 6.1.1].
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#[error("not a PRC stream: missing the \"PRC\" magic")]
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NotPrc,
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/// A value ran past the end of its byte or bit stream.
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#[error("PRC data truncated while reading {0}")]
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Truncated(&'static str),
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/// A structural field holds a value the format forbids.
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#[error("malformed PRC: {0}")]
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Malformed(String),
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/// No `Double` code of up to 22 bits matched [WD 11.17].
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#[error("PRC Double: no code matches the next 22 bits")]
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UnknownDoubleCode,
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/// A section is not a valid zlib stream.
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#[error("PRC {section} section does not inflate: {reason}")]
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Inflate {
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/// The section's name.
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section: &'static str,
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/// The decoder's message.
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reason: String,
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},
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/// The inflated sections and copied blocks together exceed the ceiling
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/// ([`crate::MAX_INFLATED_BYTES`] or the caller's limit).
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#[error("PRC sections inflate past the {limit}-byte ceiling")]
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TooLarge {
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/// The ceiling that was hit.
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limit: usize,
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},
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/// The arrays read from one stream hold more elements than [`crate::MAX_DECODED_ELEMENTS`].
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/// One bit can decode to a 4- or 8-byte element, so the inflation ceiling alone does not
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/// bound the memory the arrays take.
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#[error("PRC arrays decode past the {limit}-element ceiling")]
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TooManyElements {
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/// The ceiling that was hit.
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limit: usize,
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},
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/// A construct this reader does not decode; the part of the file holding it cannot be
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/// read past.
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#[error("PRC {0} is not supported")]
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Unsupported(&'static str),
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}
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