dirname/basename ported verbatim from ref/hare/path/posix.ha:17,37,
re-routing Hare's byte scanning to bytes.rtrim/rindex. Additive to the
c2-stack buffer core; no harness/Makefile/module-const changes.
Work-var renamed path->p to avoid Hare's param-shadowing
`let path = toutf8(path)`: ww's cgen N_LET prepends the new local into the
name-keyed localfind chain BEFORE the init is emitted, so the shadow-init
reads the fresh uninit slot — a silent miscompile, both-wrong-identical,
filed #152 and fixed independently next. drew ruled path->p a permanent
acceptable spelling (internal work-var, not API surface; avoids a
param-shadow footgun; not a rule-7 workaround). WHY-comment + #152 pointer
at both sites.
Tests: 10-row dirname/basename table (posix.ha:51-71 verbatim) — root,
no-sep, empty, trailing-sep, multi-sep all covered, expecteds traced.
C-first: cstage @test green; the str-view-vs-literal rows are #146-deferred
(wwstage byte-id, rides #125). Gate: all 324 passed, byte-id 990-997 green,
w6c/w6c_ww unchanged (lib-only additive).
Faithful realignment of lib/path to Hare's buffer-centric API
(ref/hare/path/{stack,buffer}.ha). Replaces the old str-only path.ww
wholesale (zero consumers). Scope = stack-core: init() deferred (returns
~4KB (buffer|error), rides the #40 arc / #147); abs/dirname/basename land
in c3; extension/join dropped.
appendlit uses the #145 slice-copy-assign arm (buf.buf[lo:hi]=bs), no hand
loop. dot/dotdot are faithful module-global []u8 (D2 #148). MAX =
os.PATH_MAX-1. Divergences (size->i32 indices, frombytes, module-global
consts) cited inline.
Tests: lib/path/pathtest.ww (table-driven), wired at test/wcc/989_path_run.c;
push rows mirror stack.ha:107-111 verbatim incl the restored "/d"
intermediate. Slot 989 (overflow bucket) since 970 is taken.
C-first: cstage @test green; wwstage byte-id deferred to the #125 batch.
path classified M_WWREJECT in 989_lib_byteid (w6c_ww rejects the module-
global slice consts = #120/#29; + the #148 twin #151) — self-graduates back
to M_ID the day wwstage accepts. path moved off the 900_stdlib standalone
list (import-dependent: os.PATH_MAX def-dim + match over imported error
types; coverage at 989_path_run), per the bytes/fmt/os precedent.
Gate: all 324 passed, byte-id 990-997 green, w6c/w6c_ww unchanged
(lib-only, non-embedded).
