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https://github.com/DeusData/codebase-memory-mcp.git
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Martin Vogel
7814dacf15
Two loose ends from the bounds work. The decompression side already took size_t so a >2 GiB capacity could not wrap through int, but compression still took int for both the source length and the destination capacity, and the artifact export cast a size_t database size down to reach it. A database past 2 GiB would have handed the encoder a negative length. Both lengths and the bound helper are size_t now, and the function returns int64_t like its decompressing counterpart. The discovery walk now prunes the cache directory by absolute path. A custom CBM_CACHE_DIR may sit inside a repository — tests do it routinely — and walking into it pulls every other project's graph database into this project's file list. This is the narrow form of a concern that was briefly implemented as refusing any root that contained the cache; refusing a whole root was too blunt, and not walking the cache is what the concern actually asks for. The test fails without the prune: a .go file planted under the cache is otherwise discovered, and "cache" is not in the built-in skip list, so the assertion is not vacuous. Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
28 lines
1.3 KiB
C
28 lines
1.3 KiB
C
#ifndef CBM_ZSTD_STORE_H
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#define CBM_ZSTD_STORE_H
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#include <stddef.h>
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#include <stdint.h>
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// Zstd compression at specified level (1=fast .. 22=best).
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// srcLen/dstCap are size_t for the same reason decompression's are: a >2 GiB
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// database would otherwise wrap through int and hand the encoder a capacity that
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// disagrees with the real buffer. Returns compressed size on success, 0 on error.
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int64_t cbm_zstd_compress(const char *src, size_t srcLen, char *dst, size_t dstCap, int level);
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// Zstd decompression. srcLen/dstCap are size_t so a >2 GiB destination capacity
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// is never truncated (a large DB artifact, or a crafted one, would otherwise
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// wrap through int and desync the real buffer size from the decoder capacity).
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// Returns decompressed size on success (>0), 0 on error.
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int64_t cbm_zstd_decompress(const char *src, size_t srcLen, char *dst, size_t dstCap);
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// Declared decompressed content size of a zstd frame (from its header), or 0
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// when unknown/unreadable. Lets the caller size the destination from the frame
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// itself instead of trusting a separate, attacker-controllable size field.
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size_t cbm_zstd_frame_content_size(const char *src, size_t srcLen);
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// Maximum compressed size bound for given input size.
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size_t cbm_zstd_compress_bound(size_t inputSize);
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#endif // CBM_ZSTD_STORE_H
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