[DrunkOnJava]

Summary

Unit-suite staged deletion, area container, sections and primitives. The inline #[cfg(test)] modules of 14 files build synthetic byte buffers, bit streams and page maps in each parser's own layout and assert its fields. They are unit tests, which this repository bans, and no job runs them since the Test job moved to tools/ci/run_test_targets.sh (#428). Git history is the archive.

File	Tests	Lines
bitcursor.rs	14	260
lz77.rs	12	234
r2007.rs	9	128
section.rs	9	124
api.rs	14	122
crc.rs	11	121
r21_lz.rs	9	105
limits.rs	9	94
section_map.rs	4	59
cipher.rs	4	50
object_type.rs	6	49
metadata.rs	4	46
reed_solomon.rs	4	37
header.rs	2	22

Lines removed: 1,467. Production code is unchanged: each file's #[cfg(test)] items are its test modules (three in limits.rs), so no test-only helper goes with them, and no item can become dead code (one used only by tests would already warn in the non-test library build, which CI compiles with -D warnings).

No open PR touches these files, checked against gh pr list --state open at push time. string_stream.rs is left out on purpose: its pub(crate) mod tests supplies bits_of and build_payload to the test modules of 33 files under entities/, objects/ and tables/, some of which the open PRs #323 to #412 touch, so it goes after the last of them. reader.rs, object.rs, version.rs, header_vars.rs and classes.rs wait for the same PRs.

Coverage of the area

• Every pinned drawing opens through these files. samples, corpus_roundtrip, class_census and r2013_entity_values (class real) read the 19 corpus drawings; the Corpus job measures every pinned drawing against tools/corpus/baseline.tsv, so a changed bit code, CRC, cipher, LZ77 or section-map result moves a decoded or errored count.
• Checksums, ciphers and codes on real pages: probe_data_page_header --strict (the R2004-family page header and its CRC32 on every data page), probe_header_vars (the header CRC and every stream boundary), probe_r2007_rs (every Reed-Solomon codeword of every pinned R2007 drawing, intact, re-encoded and corrected after damage), and probe_code_page.
• The specification's own worked examples (the §2 bit codes, §4.7 LZ77 and the rest of the printed tables) run in CI's Test job as examples/spec_examples.
• object_type: code_table_agreement (class contract) checks it against the dispatcher's table and the specification's Table 4.
• limits, api: no job checks the relationship between the three limit profiles or the diagnostics bookkeeping directly; both are exercised only through the CLIs and the corpus counts. Neither is a check on a value that real files give.

Spec reference

Not a decoder change. No corpus count moves: tools/corpus/baseline.tsv and tools/oracle/baseline.tsv are untouched.

Test plan

• cargo fmt --all -- --check passes (run locally; nothing else is built here).
• CI evidence, run 40675188160, all 25 checks green: Clippy (--all-targets --all-features -D warnings, which builds the lib test target, where a helper left without a user fails as dead code), the six Test legs, Corpus (public DWG) with tools/corpus/baseline.tsv and tools/oracle/baseline.tsv unchanged, and Coverage smoke. This branch is based on main before chore(ci): class every tests/ target and run all but the unit ones #428, so its Test legs ran the old cargo test; chore(ci): class every tests/ target and run all but the unit ones #428's run 40674359229 shows the classed runner, and CI runs again on this branch once chore(ci): class every tests/ target and run all but the unit ones #428 lands.

Source-provenance declaration

By submitting this PR I certify that my contribution does not incorporate executable code from any source whose license is incompatible with Apache-2.0. Specifically:

• No Autodesk DWG SDK source (RealDWG, ObjectARX, ObjectDBX) or NDA-protected Autodesk documentation was consulted or imported.
• No Open Design Alliance Teigha / Drawings SDK source was consulted or imported. The ODA's public Open Design Specification for .dwg files PDF is explicitly allowed (see CLEANROOM.md).
• No GPL-licensed DWG implementation source (LibreDWG, etc.) was consulted or imported. This matters because dwg-rs is Apache-2.0 and must remain compatible.

My contribution is based on:

• The ODA's freely-redistributable Open Design Specification for .dwg files (v5.4.1);
• Public reverse-engineering notes, research papers, or blog posts cited inline;
• Reading algorithm-description comments (not executable code) in permissively-licensed projects (MIT / Apache / BSD) to resolve spec ambiguities: none were read for this change.

See CLEANROOM.md for the full allowed/forbidden source list and the honest scope of what "clean-room" means for this project.

Developer Certificate of Origin

By submitting this PR, I certify that the contribution complies with the Developer Certificate of Origin 1.1. Specifically, I affirm that the contribution is my own work (or rightfully licensed to me) and that it can be distributed under the project's Apache-2.0 license.

[chatgpt-codex-connector]

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-28T12:42:33.896904Z	fab2bd4	New commits

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