Files
sx/examples/1213-ffi-05-string-args.h
agra 4e942b5373 test: migrate examples to XXXX-category-name layout + split expected streams
Rename all example tests/companions to the XXXX-category-test-name scheme
(per-category 100-blocks: basic 0010, types 0100, ... errors 1000,
diagnostics 1100, ffi 1200, ffi-objc 1300, ffi-jni 1400, vectors 1500,
platform 1600). Companions and dir/C fixtures move in lockstep with their
parent test; #import/#source/#include paths rewritten to match.

Expected output now lives in examples/expected/ (a sibling dir of the
tests) split into three streams per the new convention:
  <name>.exit / <name>.stdout / <name>.stderr  (+ optional <name>.ir)

run_examples.sh rewritten: scans examples/ and issues/ for an
expected/<name>.exit marker, captures stdout and stderr separately (no
more 2>&1), compares each stream + exit + optional IR snapshot.

Behavior validated unchanged: every renamed test reproduces its prior
merged output + exit (diffs limited to file paths/basenames embedded in
diagnostics + traces, which correctly reflect the new names). Suite:
292 passed, 0 failed. 50-smoke.sx split + issue relocation + docs follow
in subsequent commits.
2026-06-01 19:05:15 +03:00

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C

// String / byte-pointer FFI baselines. Covers the three shapes
// callers actually use at the sx ↔ C boundary:
// - null-terminated `[:0]u8` (C-style string)
// - raw byte pointer `[*]u8` + length (slice-style)
// - sx `string` decayed to `ptr` (the slice-decay branch
// in coerceArg pulls .ptr)
#include <stddef.h>
int ffi_strlen (const char *s);
int ffi_first_byte (const char *s);
int ffi_sum_bytes (const unsigned char *buf, int len);
void ffi_write_byte (unsigned char *buf, int idx, unsigned char val);
const char* ffi_static_greeting(void);