[echoix]

A reviewer on #720 asked whether C translation strings can use positional placeholders (%1$s, %2$s) so translators can reorder arguments. GRASS messages go through G_vasprintf() to vsnprintf, and I don't know whether that supports %N$ on Windows.

This adds a throwaway workflow that compiles a small C program with MSVC and with MSYS2 MinGW64 (with and without __USE_MINGW_ANSI_STDIO) and prints PASS/FAIL for snprintf, a vsnprintf wrapper and, on MSVC, _snprintf_p/_vsprintf_p. It does not build GRASS and is not meant to be merged upstream.

I used Claude to help write the workflow.

[github-actions]

[pre-commit] _{reported by reviewdog 🐶}

Suggested change

	#define DEFINE_WRAPPER(name, vfunc) \
	static int name(char *buf, size_t n, const char *fmt, ...) \
	{ \
	va_list ap; \
	int ret; \
	\
	va_start(ap, fmt); \
	ret = vfunc(buf, n, fmt, ap); \
	va_end(ap); \
	return ret; \
	#define DEFINE_WRAPPER(name, vfunc) \
	static int name(char *buf, size_t n, const char *fmt, ...) \
	{ \
	va_list ap; \
	int ret; \
	\
	va_start(ap, fmt); \
	ret = vfunc(buf, n, fmt, ap); \
	va_end(ap); \
	return ret; \

[github-actions]

[pre-commit] _{reported by reviewdog 🐶}

Suggested change

	#define RUN_CASES(label, fn) \
	do { \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$s %1$s", "a", "b"); \
	report(label, "%2$s %1$s", buf, "b a"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$d %1$s", "x", 42); \
	report(label, "%2$d %1$s", buf, "42 x"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$lu %1$llu", 5ULL, 7UL); \
	report(label, "%2$lu %1$llu", buf, "7 5"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$" PRIu64 " %1$s", "x", (uint64_t)123); \
	report(label, "%2$" PRIu64 " %1$s", buf, "123 x"); \
	#define RUN_CASES(label, fn) \
	do { \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$s %1$s", "a", "b"); \
	report(label, "%2$s %1$s", buf, "b a"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$d %1$s", "x", 42); \
	report(label, "%2$d %1$s", buf, "42 x"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$lu %1$llu", 5ULL, 7UL); \
	report(label, "%2$lu %1$llu", buf, "7 5"); \
	memset(buf, 0, sizeof buf); \
	fn(buf, sizeof buf, "%2$" PRIu64 " %1$s", "x", (uint64_t)123); \
	report(label, "%2$" PRIu64 " %1$s", buf, "123 x"); \