1 files changed, 102 insertions, 0 deletions

diff --git a/src/engine/variant.h b/src/engine/variant.h
new file mode 100644
index 00000000..9259f05a
--- /dev/null
+++ b/src/engine/variant.h
@@ -0,0 +1,102 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// constants
+
+enum BURN_VARIANT_TYPE
+{
+    BURN_VARIANT_TYPE_NONE,
+    BURN_VARIANT_TYPE_NUMERIC,
+    BURN_VARIANT_TYPE_STRING,
+    BURN_VARIANT_TYPE_VERSION,
+};
+
+
+// struct
+
+typedef struct _BURN_VARIANT
+{
+    union
+    {
+        LONGLONG llValue;
+        DWORD64 qwValue;
+        LPWSTR sczValue;
+        BYTE encryptionPadding[CRYP_ENCRYPT_MEMORY_SIZE];
+    };
+    BURN_VARIANT_TYPE Type;
+    BOOL fEncryptValue;
+} BURN_VARIANT;
+
+
+// function declarations
+
+void BVariantUninitialize(
+    __in BURN_VARIANT* pVariant
+    );
+HRESULT BVariantGetNumeric(
+    __in BURN_VARIANT* pVariant,
+    __out LONGLONG* pllValue
+    );
+HRESULT BVariantGetString(
+    __in BURN_VARIANT* pVariant,
+    __out_z LPWSTR* psczValue
+    );
+HRESULT BVariantGetVersion(
+    __in BURN_VARIANT* pVariant,
+    __out DWORD64* pqwValue
+    );
+HRESULT BVariantSetNumeric(
+    __in BURN_VARIANT* pVariant,
+    __in LONGLONG llValue
+    );
+HRESULT BVariantSetString(
+    __in BURN_VARIANT* pVariant,
+    __in_z_opt LPCWSTR wzValue,
+    __in DWORD_PTR cchValue
+    );
+HRESULT BVariantSetVersion(
+    __in BURN_VARIANT* pVariant,
+    __in DWORD64 qwValue
+    );
+/********************************************************************
+BVariantSetValue - Convenience function that calls BVariantUninitialize,
+                   BVariantSetNumeric, BVariantSetString, or 
+                   BVariantSetVersion based on the type of pValue.
+                   The encryption state of pVariant is preserved.
+********************************************************************/
+HRESULT BVariantSetValue(
+    __in BURN_VARIANT* pVariant,
+    __in BURN_VARIANT* pValue
+    );
+/********************************************************************
+BVariantCopy - creates a copy of pSource.
+               The encryption state of pTarget is set to
+               the encryption state of pSource.
+********************************************************************/
+HRESULT BVariantCopy(
+    __in BURN_VARIANT* pSource,
+    __out BURN_VARIANT* pTarget
+    );
+HRESULT BVariantChangeType(
+    __in BURN_VARIANT* pVariant,
+    __in BURN_VARIANT_TYPE type
+    );
+/********************************************************************
+BVariantSetEncryption - sets the encryption state of pVariant.
+                        If the encryption state matches the requested
+                        state, this function does nothing.
+********************************************************************/
+HRESULT BVariantSetEncryption(
+    __in BURN_VARIANT* pVariant,
+    __in BOOL fEncrypt
+    );
+
+#if defined(__cplusplus)
+}
+#endif