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Add GetThreadPreferredUILanguages

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2023-10-01 22:48:33 +02:00
parent 7637d86c7d
commit c1bd614597
1 changed files with 30 additions and 0 deletions
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30
include/WinStd/Win.h
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@ -2476,6 +2476,36 @@ static DWORD SetEntriesInAclW(_In_ ULONG cCountOfExplicitEntries, _In_reads_opt_
return ERROR_SUCCESS;
}
///
/// Retrieves the thread preferred UI languages for the current thread.
///
/// \sa [GetThreadPreferredUILanguages function](https://learn.microsoft.com/en-us/windows/win32/api/winnls/nf-winnls-getthreadpreferreduilanguages)
///
template<class _Traits, class _Ax>
_Success_(return != 0) BOOL GetThreadPreferredUILanguages(_In_ DWORD dwFlags, _Out_ PULONG pulNumLanguages, _Out_ std::basic_string<wchar_t, _Traits, _Ax> &sValue)
{
wchar_t szStackBuffer[WINSTD_STACK_BUFFER_BYTES/sizeof(wchar_t)];
ULONG ulSize = _countof(szStackBuffer);
// Try with stack buffer first.
if (GetThreadPreferredUILanguages(dwFlags, pulNumLanguages, szStackBuffer, &ulSize)) {
// Copy from stack.
sValue.assign(szStackBuffer, ulSize - 1);
return TRUE;
} else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
// Query required size.
ulSize = 0;
GetThreadPreferredUILanguages(dwFlags, pulNumLanguages, NULL, &ulSize);
// Allocate on heap and retry.
std::unique_ptr<WCHAR[]> szBuffer(new WCHAR[ulSize]);
if (GetThreadPreferredUILanguages(dwFlags, pulNumLanguages, szBuffer.get(), &ulSize)) {
sValue.assign(szBuffer.get(), ulSize - 1);
return TRUE;
}
}
return FALSE;
}
#pragma warning(pop)
/// @}