From 738ff9dc04fb0e70108415994d5e45ee26258acb Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Wed, 19 Feb 2025 11:02:20 +0200
Subject: [PATCH] [NDK] Add some Vista+ Rtl locale functions

---
 sdk/include/ndk/rtlfuncs.h | 53 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/sdk/include/ndk/rtlfuncs.h b/sdk/include/ndk/rtlfuncs.h
index 6b37f4a0766..41ecb3d8f31 100644
--- a/sdk/include/ndk/rtlfuncs.h
+++ b/sdk/include/ndk/rtlfuncs.h
@@ -5112,6 +5112,59 @@ VOID
 NTAPI
 RtlReleaseSRWLockExclusive(IN OUT PRTL_SRWLOCK SRWLock);
 
+NTSYSAPI
+NTSTATUS
+NTAPI
+RtlConvertLCIDToString(
+    _In_ LCID LcidValue,
+    _In_ ULONG Base,
+    _In_ ULONG Padding,
+    _Out_writes_(Size) PWSTR pResultBuf,
+    _In_ ULONG Size);
+
+_Success_(return != FALSE)
+NTSYSAPI
+BOOLEAN
+NTAPI
+RtlCultureNameToLCID(
+    _In_ PCUNICODE_STRING String,
+    _Out_ PLCID Lcid);
+
+_Success_(return != FALSE)
+NTSYSAPI
+BOOLEAN
+NTAPI
+RtlLCIDToCultureName(
+    _In_ LCID Lcid,
+    _Inout_ PUNICODE_STRING String);
+
+NTSYSAPI
+NTSTATUS
+NTAPI
+RtlLcidToLocaleName(
+    _In_ LCID Lcid,
+    _Inout_ PUNICODE_STRING LocaleName,
+    _In_ ULONG Flags,
+    _In_ BOOLEAN AllocateDestinationString);
+
+NTSYSAPI
+NTSTATUS
+NTAPI
+RtlLocaleNameToLcid(
+    _In_ PCWSTR LocaleName,
+    _Out_ PLCID Lcid,
+    _In_ ULONG Flags);
+
+NTSYSAPI
+BOOLEAN
+NTAPI
+RtlIsValidLocaleName(
+    _In_ LPCWSTR LocaleName,
+    _In_ ULONG Flags);
+
+// Flags for RtlLocaleNameToLcid / RtlLcidToLocaleName / RtlIsValidLocaleName
+#define RTL_LOCALE_ALLOW_NEUTRAL_NAMES 0x00000002 // Return locales like "en" or "de"
+
 #endif /* Win vista or Reactos Ntdll build */
 
 #if (_WIN32_WINNT >= _WIN32_WINNT_WIN7) || (defined(__REACTOS__) && defined(_NTDLLBUILD_))