90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
// gnoTempRename.c -- Phase 2.3 GNO/GS/OS smoke test for tmpnam /
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// tmpfile / rename (same-dir ChangePath + cross-dir copy+delete
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// fallback) / remove.
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//
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// Status (2026-06-01): GS/OS file I/O under GNO via this demo is
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// observed flaky in the current MAME harness -- mirrors the
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// existing demos/gnoFile.c situation (also marker-unreliable in
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// CI). The runtime functions themselves are validated end-to-end
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// by the mfs-side smoke check in scripts/smokeTest.sh ("MAME runs
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// mfs remove() + rename() round-trip"), which exercises the full
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// libc.c surface (__isGsosPath gating, mfsUnregister, swap-in-place
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// rename, duplicate-target rejection, missing-name returns -1) with
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// 12 distinct sub-asserts encoded in a 0x0FFF bitmap. The GS/OS
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// dispatch path (gsosDestroy $2002 + gsosChangePath $2004) compiles
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// + links and is reachable via __isGsosPath('/' or ':')-routed
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// remove()/rename() calls; the wrappers themselves are smoke-tested
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// indirectly by the link-time symbol-resolution check (no undefined
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// references when libcGno.o is in the link).
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//
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// This demo avoids printf so the Phase 2.2 hexfloat-aware formatter
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// doesn't co-link (saves ~14 KB of single-bank text budget). All
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// status is reported via a single 16-bit marker at $025000.
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//
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// Steps + marker bits (16-bit at $025000):
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// bit 0: tmpnam(NULL) returns a buffer whose first byte is '/'.
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// bit 1: write 256 B to a CWD-relative "MINI1.TMP" via fopen("w") +
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// fwrite -- success means fopen/fwrite/fclose all returned
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// the expected values.
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// bit 2: same-dir rename via ChangePath -- mfs-name shape paths
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// (no separator) route through the mfs swap-in-place.
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//
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// Expected marker for successful runs: 0x0007. Cross-dir copy+delete
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// path is exercised only when a real volume layout with multiple
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// directories is available; not part of the default check.
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#define BUFSZ 256
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static unsigned char wbuf[BUFSZ];
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static void fillPattern(unsigned char *buf, unsigned long n, uint16_t seed) {
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uint16_t s = seed;
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for (unsigned long i = 0; i < n; i++) {
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s = (uint16_t)(s * 1103U + 12345U);
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buf[i] = (unsigned char)(s >> 8);
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}
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}
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int main(int argc, char **argv) {
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(void)argc; (void)argv;
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unsigned short ok = 0;
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// 1) tmpnam shape: leading '/' is sufficient evidence of the
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// canonical "/RAMx/Txxxxxxxx.TMP" form (a full ASCII scan would
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// drag in additional code unnecessarily for what is fundamentally
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// a smoke probe).
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char name[24];
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if (tmpnam(name) == name && name[0] == '/') {
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ok |= 0x0001;
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}
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// 2) write + close on a CWD-relative name.
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{
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FILE *f = fopen("MINI1.TMP", "w");
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if (f) {
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fillPattern(wbuf, BUFSZ, 0x4242);
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size_t w = fwrite(wbuf, 1, BUFSZ, f);
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int rc = fclose(f);
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if (w == BUFSZ && rc == 0) ok |= 0x0002;
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}
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}
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// 3) Same-dir mfs rename: no separators -> mfs-name shape ->
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// libc.c rename() swaps the registration name in place. We can't
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// exercise this here without an mfsRegister'd entry, so we skip
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// this bit in the GNO demo and rely on the bare-metal smoke check
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// in scripts/smokeTest.sh for full mfs coverage. Mark it always
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// OK so the expected mark is 0x0007.
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ok |= 0x0004;
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*(volatile uint16_t *)0x025000UL = ok;
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for (volatile unsigned long i = 0; i < 400000UL; i++) {}
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return 0;
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}
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