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diff --git a/src/VBox/Storage/testcase/VDScript.h b/src/VBox/Storage/testcase/VDScript.h
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+++ b/src/VBox/Storage/testcase/VDScript.h
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+/** @file
+ *
+ * VBox HDD container test utility - scripting engine.
+ */
+
+/*
+ * Copyright (C) 2013 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+#ifndef _VDScript_h__
+#define _VDScript_h__
+
+/** Handle to the scripting context. */
+typedef struct VDSCRIPTCTXINT *VDSCRIPTCTX;
+/** Pointer to a scripting context handle. */
+typedef VDSCRIPTCTX *PVDSCRIPTCTX;
+
+/**
+ * Supprted primitive types in the scripting engine.
+ */
+typedef enum VDSCRIPTTYPE
+{
+    /** Invalid type, do not use. */
+    VDSCRIPTTYPE_INVALID = 0,
+    /** void type, used for no return value of methods. */
+    VDSCRIPTTYPE_VOID,
+    /** unsigned 8bit integer. */
+    VDSCRIPTTYPE_UINT8,
+    VDSCRIPTTYPE_INT8,
+    VDSCRIPTTYPE_UINT16,
+    VDSCRIPTTYPE_INT16,
+    VDSCRIPTTYPE_UINT32,
+    VDSCRIPTTYPE_INT32,
+    VDSCRIPTTYPE_UINT64,
+    VDSCRIPTTYPE_INT64,
+    VDSCRIPTTYPE_STRING,
+    VDSCRIPTTYPE_BOOL,
+    /** As usual, the 32bit blowup hack. */
+    VDSCRIPTTYPE_32BIT_HACK = 0x7fffffff
+} VDSCRIPTTYPE;
+/** Pointer to a type. */
+typedef VDSCRIPTTYPE *PVDSCRIPTTYPE;
+/** Pointer to a const type. */
+typedef const VDSCRIPTTYPE *PCVDSCRIPTTYPE;
+
+/**
+ * Script argument.
+ */
+typedef struct VDSCRIPTARG
+{
+    /** Type of the argument. */
+    VDSCRIPTTYPE    enmType;
+    /** Value */
+    union
+    {
+        uint8_t     u8;
+        int8_t      i8;
+        uint16_t    u16;
+        int16_t     i16;
+        uint32_t    u32;
+        int32_t     i32;
+        uint64_t    u64;
+        int64_t     i64;
+        const char *psz;
+        bool        f;
+    };
+} VDSCRIPTARG;
+/** Pointer to an argument. */
+typedef VDSCRIPTARG *PVDSCRIPTARG;
+
+/** Script callback. */
+typedef DECLCALLBACK(int) FNVDSCRIPTCALLBACK(PVDSCRIPTARG paScriptArgs, void *pvUser);
+/** Pointer to a script callback. */
+typedef FNVDSCRIPTCALLBACK *PFNVDSCRIPTCALLBACK;
+
+/**
+ * Callback registration structure.
+ */
+typedef struct VDSCRIPTCALLBACK
+{
+    /** The function name. */
+    const char            *pszFnName;
+    /** The return type of the function. */
+    VDSCRIPTTYPE           enmTypeReturn;
+    /** Pointer to the array of argument types. */
+    PCVDSCRIPTTYPE         paArgs;
+    /** Number of arguments this method takes. */
+    unsigned               cArgs;
+    /** The callback handler. */
+    PFNVDSCRIPTCALLBACK    pfnCallback;
+} VDSCRIPTCALLBACK;
+/** Pointer to a callback register entry. */
+typedef VDSCRIPTCALLBACK *PVDSCRIPTCALLBACK;
+/** Pointer to a const callback register entry. */
+typedef const VDSCRIPTCALLBACK *PCVDSCRIPTCALLBACK;
+
+/**
+ * Create a new scripting context.
+ *
+ * @returns VBox status code.
+ * @param   phScriptCtx    Where to store the scripting context on success.
+ */
+DECLHIDDEN(int) VDScriptCtxCreate(PVDSCRIPTCTX phScriptCtx);
+
+/**
+ * Destroys the given scripting context.
+ *
+ * @returns nothing.
+ * @param   hScriptCtx     The script context to destroy.
+ */
+DECLHIDDEN(void) VDScriptCtxDestroy(VDSCRIPTCTX hScriptCtx);
+
+/**
+ * Register callbacks for the scripting context.
+ *
+ * @returns VBox status code.
+ * @param   hScriptCtx     The script context handle.
+ * @param   paCallbacks    Pointer to the callbacks to register.
+ * @param   cCallbacks     Number of callbacks in the array.
+ * @param   pvUser         Opaque user data to pass on the callback invocation.
+ */
+DECLHIDDEN(int) VDScriptCtxCallbacksRegister(VDSCRIPTCTX hScriptCtx, PCVDSCRIPTCALLBACK paCallbacks,
+                                             unsigned cCallbacks, void *pvUser);
+
+/**
+ * Load a given script into the context.
+ *
+ * @returns VBox status code.
+ * @param   hScriptCtx     The script context handle.
+ * @param   pszScript      Pointer to the char buffer containing the script.
+ */
+DECLHIDDEN(int) VDScriptCtxLoadScript(VDSCRIPTCTX hScriptCtx, const char *pszScript);
+
+/**
+ * Execute a given method in the script context.
+ *
+ * @returns VBox status code.
+ * @param   hScriptCtx     The script context handle.
+ * @param   pszFnCall      The method to call.
+ * @param   paArgs         Pointer to arguments to pass.
+ * @param   cArgs          Number of arguments.
+ */
+DECLHIDDEN(int) VDScriptCtxCallFn(VDSCRIPTCTX hScriptCtx, const char *pszFnCall,
+                                  PVDSCRIPTARG paArgs, unsigned cArgs);
+
+#endif /* _VDScript_h__ */