[gnutls-devel] GnuTLS | Re-introduce topendir on Windows with Unicode support (!932)

[Development of GNU's TLS library]

Hugo Beauzée-Luyssen commented on a discussion on lib/x509/verify-high2.c:

> +	gnutls_datum_t utf16 = {NULL, 0};
> +
> +	r = _gnutls_utf8_to_ucs2(dirname, strlen(dirname), &utf16);
> +	if (r < 0)
> +		return gnutls_assert_val(r);
> +	dirp = _topendir((_TCHAR*)utf16.data);
> +	gnutls_free(utf16.data);
> +	if (dirp != NULL) {
> +		do {
> +			d = _treaddir(dirp);
> +			if (d != NULL
> +#ifdef _DIRENT_HAVE_D_TYPE
> +				&& (d->d_type == DT_REG || d->d_type == DT_LNK || d->d_type == DT_UNKNOWN)
> +#endif
> +			) {
> +				snprintf(path, sizeof(path), "%s/%S",

My bad, I thought %S was covered by the standard, but it seems it's not.

Regarding the 2nd part of your question, my understanding is that they are converted indeed
```
If an l length modifier is present, the argument shall be a pointer to the initial
element of an array of wchar_t type. Wide characters from the array are
converted to multibyte characters
```
N1548 - §7.21.6.1

I'll make the change locally and will check with the testsuite

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