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/** @file
*
* VBox HDD container test utility - scripting engine.
*/
/*
* Copyright (C) 2013-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#ifndef VBOX_INCLUDED_SRC_testcase_VDScript_h
#define VBOX_INCLUDED_SRC_testcase_VDScript_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/** 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,
VDSCRIPTTYPE_POINTER,
/** 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;
void *p;
};
} VDSCRIPTARG;
/** Pointer to an argument. */
typedef VDSCRIPTARG *PVDSCRIPTARG;
/** Script callback. */
typedef DECLCALLBACKTYPE(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;
/**
* @{
*/
/** The address space stays assigned to a variable
* even if the pointer is casted to another type.
*/
#define VDSCRIPT_AS_FLAGS_TRANSITIVE RT_BIT(0)
/** @} */
/**
* Address space read callback
*
* @returns VBox status code.
* @param pvUser Opaque user data given on registration.
* @param Address The address to read from, address is stored in the member for
* base type given on registration.
* @param pvBuf Where to store the read bits.
* @param cbRead How much to read.
*/
typedef DECLCALLBACKTYPE(int, FNVDSCRIPTASREAD,(void *pvUser, VDSCRIPTARG Address, void *pvBuf, size_t cbRead));
/** Pointer to a read callback. */
typedef FNVDSCRIPTASREAD *PFNVDSCRIPTASREAD;
/**
* Address space write callback
*
* @returns VBox status code.
* @param pvUser Opaque user data given on registration.
* @param Address The address to write to, address is stored in the member for
* base type given on registration.
* @param pvBuf Data to write.
* @param cbWrite How much to write.
*/
typedef DECLCALLBACKTYPE(int, FNVDSCRIPTASWRITE,(void *pvUser, VDSCRIPTARG Address, const void *pvBuf, size_t cbWrite));
/** Pointer to a write callback. */
typedef FNVDSCRIPTASWRITE *PFNVDSCRIPTASWRITE;
/**
* 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);
/**
* Registers a new address space provider.
*
* @returns VBox status code.
* @param hScriptCtx The script context handle.
* @param pszType The type string.
* @param enmBaseType The base integer type to use for the address space.
* Bool and String are not supported of course.
* @param pfnRead The read callback for the registered address space.
* @param pfnWrite The write callback for the registered address space.
* @param pvUser Opaque user data to pass to the read and write callbacks.
* @param fFlags Flags, see VDSCRIPT_AS_FLAGS_*.
*
* @note This will automatically register a new type with the identifier given in pszType
* used for the pointer. Every variable with this type is automatically treated as a pointer.
*
* @note If the transitive flag is set the address space stays assigned even if the pointer value
* is casted to another pointer type.
* In the following example the pointer pStruct will use the registered address space for RTGCPHYS
* and dereferencing the pointer causes the read/write callbacks to be triggered.
*
* ...
* Struct *pStruct = (Struct *)(RTGCPHYS)0x12345678;
* pStruct->count++;
* ...
*/
DECLHIDDEN(int) VDScriptCtxAsRegister(VDSCRIPTCTX hScriptCtx, const char *pszType, VDSCRIPTTYPE enmBaseType,
PFNVDSCRIPTASREAD pfnRead, PFNVDSCRIPTASWRITE pfnWrite, void *pvUser,
uint32_t fFlags);
#endif /* !VBOX_INCLUDED_SRC_testcase_VDScript_h */
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