Eremey Valetov
c736b19bae
Root cause: the original UC2 Pro expects csize=0 in the cdir COMPRESS record (it ignores the field entirely). UC2 v3 was writing the actual compressed size, which confused the original's archive reader. Additional changes: - Use default Huffman tree for all blocks (ensures tree encoding compat) - Write method=compression_level in cdir COMPRESS (was hardcoded to 1) - Add tests/scripts/bitdump.py for bit-level bitstream analysis Single-file UC2 v3 archives are now fully readable by the original UC2 Pro (listing and extraction verified in DOSBox-X). Multi-file archives still hang — the cdir bitstream decodes correctly in our Python analyzer but fails in the original's ASM decompressor kernel. Investigation continues; the bitdump.py tool enables targeted comparison.
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1.6 KiB
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43 lines
1.6 KiB
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Roadmap
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=======
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The development roadmap is maintained in ``ROADMAP.md`` at the project
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root. Key phases:
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1. **Decompression MVP** — Done. Portable decompressor, CLI tool,
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CMake build system.
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2. **Original Compression Engine** — Done. LZ77+Huffman compressor.
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Cross-tool round-trip verified: original UC2 Pro archives extract
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correctly in UC2 v3. Reverse direction partial: single-file UC2
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v3 archives are now readable by the original (listing + extraction).
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Multi-file archives still hang; under investigation.
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3. **Modernized Master-Block Deduplication** — In progress.
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Content-fingerprint grouping and custom master-block generation done
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(FNV-1a sampling, MASMETA cdir records, SuperMaster-compressed
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masters). Remaining: content-defined chunking, Merkle DAG,
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cross-archive dedup, near-duplicate detection.
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4. **Modern Compression Backends** — ANS entropy coding,
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zstd-inspired dictionary compression, content-aware preprocessing.
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5. **Quantum-Resistant Encryption** — CRYSTALS-Kyber + AES-256-GCM.
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6. **DOS / FreeDOS / Retro-Computing** — DJGPP toolchain, vintage
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hardware support, self-extracting archives.
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7. **Cryptographic Integrity & Timestamping** — BLAKE3 hashing,
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OpenTimestamps.
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8. **Decentralized & Cloud Integration** — IPFS pinning,
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content-addressable dedup, cloud archiving.
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9. **Zero-Knowledge Proofs** — Privacy-preserving archive verification.
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10. **Ecosystem Integrations** — libarchive plugin, streaming dedup
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ingestion, file manager plugins.
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See the full roadmap: `ROADMAP.md on GitHub
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<https://github.com/evvaletov/uc2/blob/main/ROADMAP.md>`_.
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