internal/

Package ccharvest holds the shared harvest primitives used by the Common Crawl tooling (tools/ccfetch and tools/ccrun): WARC range fetching, WARC record decoding, OPC/OOXML validation and real-type classification, the DNS-over-HTTPS blocklist gate for live refetches, and small digest/dedup helpers.

Package faultio provides writers that fail part-way through, so a save can be tested against the failure it will eventually meet.

Package fuzzbound bounds the resources one parse of attacker-controlled bytes may consume, so that a fuzz target fails on a resource blow-up instead of merely surviving it.

Package fuzzseed provides shared helpers for the fuzz targets in opc, pptx, docx, and xlsx: in-memory zip assembly, zip entry replacement, and optional seeding from the (gitignored) Common Crawl corpus when present.

Package imagesniff identifies image bytes by their magic prefix.

Package maporder analyses this repository's serialization packages for map iteration whose order reaches the output.

Package schemavalid validates parts this library authors against the OOXML XML Schema definitions, using libxml2 through the xmllint binary.

Package sheetref formats the worksheet part of an A1-style formula reference.

Package testutil provides shared test helpers for round-trip testing of Office documents (PPTX, DOCX, XLSX).