jedarden
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b1317457e7
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feat(pdftract-3nnqy): implement StreamDecoder trait, filter pipeline, and bomb limit
- StreamDecoder trait with decode() method for filter-specific decoding
- Per-filter implementations: FlateDecoder, ASCII85Decoder, ASCIIHexDecoder, PassthroughDecoder
- decode_stream() function with single and array filter handling
- Filter abbreviation normalization (/A85 -> ASCII85Decode, /Fl -> FlateDecode)
- ExtractionOptions with max_decompress_bytes (default 2 GB)
- Document-level decompression counter with chunked bomb limit checking
- Unknown filter returns raw bytes with STRUCT_UNKNOWN_FILTER diagnostic
- All 183 tests pass
Acceptance criteria:
- decode_stream() handles single-filter and array-filter cases: PASS
- /DecodeParms array correctly paired with /Filter array: PASS
- Critical test [/ASCII85Decode /FlateDecode] applies filters in order: PASS
- Filter abbreviations normalized: PASS
- 2 GB bomb limit with STREAM_BOMB diagnostic: PASS
- Unknown filter passthrough with STRUCT_UNKNOWN_FILTER: PASS
- INV-8 maintained (no panics, partial bytes on error): PASS
Co-Authored-By: Claude Code <noreply@anthropic.com>
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2026-05-18 00:34:28 -04:00 |
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