Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

sdk/lib/drivers/rtlver/rtl.c

@@ -0,0 +1,41 @@
+/*
+ * PROJECT:         ReactOS Kernel - Vista+ APIs
+ * LICENSE:         GPL v2 - See COPYING in the top level directory
+ * FILE:            lib/drivers/ntoskrnl_vista/rtl.c
+ * PURPOSE:         Implementation of RtlIsNtDdiVersionAvailable and RtlIsServicePackVersionInstalled 
+ * PROGRAMMERS:     Pierre Schweitzer <pierre@reactos.org>
+ */
+
+#include <ntdef.h>
+#include <ntifs.h>
+
+BOOLEAN
+WdmlibRtlIsNtDdiVersionAvailable(
+    _In_ ULONG Version)
+{
+    UNICODE_STRING ImportName;
+    ULONG Major, Minor, Current;
+    BOOLEAN (NTAPI *pRtlIsNtDdiVersionAvailable)(ULONG Version);
+
+    /* Try to use ntoskrnl version if available */
+    RtlInitUnicodeString(&ImportName, L"RtlIsNtDdiVersionAvailable");
+    pRtlIsNtDdiVersionAvailable = MmGetSystemRoutineAddress(&ImportName);
+    if (pRtlIsNtDdiVersionAvailable)
+    {
+        return pRtlIsNtDdiVersionAvailable(Version);
+    }
+
+    /* Only provide OS version. No SP */
+    if (SPVER(Version) || SUBVER(Version))
+    {
+        return FALSE;
+    }
+
+    /* Compute the version and compare */
+    Major = 0;
+    Minor = 0;
+    PsGetVersion(&Major, &Minor, NULL, NULL);
+    Current = (Minor + (Major << 8)) << 16;
+
+    return (Current >= Version);
+}