Orkuncakilkaya
2ddf830f0b
Crypto (#19): add the OS cryptographically-secure random surface (random_bytes/random_hex/random_u32, reading /dev/urandom) and a standard base64 encoder, completing the library alongside the existing SHA-256/ HMAC-SHA256/verify_hmac/hex/ct_equal. All pure integer IR, C-free. Uuid (#16): a new namespace for stable, collision-free IDs — v4 (random) and v7 (time-ordered) generation, plus parse/is_valid/to_text/equals/nil. UUIDs are canonical lowercase 36-char strings; v4 and v7's random tail draw from the crypto CSPRNG, so both carry the documented determinism caveat (mint at the edges, never inside lockstep simulation). Reuses the crypto prelude's fn_secure_bytes / fn_hex_encode. - examples/library/{crypto,uuid}.ludic: known-answer vectors (SHA-256, HMAC, base64 per RFC 4231/4648) and structural invariants (uuid version/variant bits, parse/equals), wired into `x test` (now 51 passed). - docs: per-symbol pages for every new method + a new Uuid section; inventory and impl-vs-docs coverage check pass. - seed regenerated; `x bootstrap-cfree` fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
1.7 KiB
| id | title | order |
|---|---|---|
| uuid | Uuid | 6 |
Universally-unique identifiers — stable IDs that don't collide, generated locally with no central authority handing out numbers. Reach for a UUID whenever something needs an identity that survives being saved, shared, or sent over a network: players and sessions in multiplayer, user-created content (levels, items, mods) that has to merge cleanly across installs, or a per-install / per-run ID for analytics and bug reports.
Two versions are provided. Uuid.new makes a v4 (random) UUID — 122 bits of entropy, effectively never colliding. Uuid.new_v7 makes a v7 (time-ordered) UUID whose leading bits are a millisecond timestamp, so a batch of v7 IDs sorts by creation time — friendly to database indexes and append logs. Both set the RFC 4122 version and variant bits correctly.
A UUID is represented as its canonical lowercase 36-character text form (8-4-4-4-12), the same shape you store, print, send, and compare — so there is no conversion at each boundary. Validate untrusted input with Uuid.is_valid or normalise it with Uuid.parse, and compare with Uuid.equals, which ignores case.
Determinism caveat. v4 and the random tail of v7 come from the OS cryptographically-secure RNG (Crypto), which is non-deterministic by design. Minting a UUID inside the lockstep simulation will desync replays and networked peers — generate IDs at the edges (on connect, on save, on spawn-from-input), never per tick in reproducible gameplay code.