utcopy.c

acpi tools for linux include acpiexec and acpixtract

    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (UtCopyEobjectToIobject);


    if (ExternalObject->Type == ACPI_TYPE_PACKAGE)
    {
        Status = AcpiUtCopyEpackageToIpackage (ExternalObject, InternalObject);
    }
    else
    {
        /*
         * Build a simple object (no nested objects)
         */
        Status = AcpiUtCopyEsimpleToIsimple (ExternalObject, InternalObject);
    }

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopySimpleObject
 *
 * PARAMETERS:  SourceDesc          - The internal object to be copied
 *              DestDesc            - New target object
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Simple copy of one internal object to another.  Reference count
 *              of the destination object is preserved.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopySimpleObject (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_OPERAND_OBJECT     *DestDesc)
{
    UINT16                  ReferenceCount;
    ACPI_OPERAND_OBJECT     *NextObject;


    /* Save fields from destination that we don't want to overwrite */

    ReferenceCount = DestDesc->Common.ReferenceCount;
    NextObject = DestDesc->Common.NextObject;

    /* Copy the entire source object over the destination object*/

    ACPI_MEMCPY ((char *) DestDesc, (char *) SourceDesc,
                    sizeof (ACPI_OPERAND_OBJECT));

    /* Restore the saved fields */

    DestDesc->Common.ReferenceCount = ReferenceCount;
    DestDesc->Common.NextObject = NextObject;

    /* New object is not static, regardless of source */

    DestDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER;

    /* Handle the objects with extra data */

    switch (ACPI_GET_OBJECT_TYPE (DestDesc))
    {
    case ACPI_TYPE_BUFFER:
        /*
         * Allocate and copy the actual buffer if and only if:
         * 1) There is a valid buffer pointer
         * 2) The buffer has a length > 0
         */
        if ((SourceDesc->Buffer.Pointer) &&
            (SourceDesc->Buffer.Length))
        {
            DestDesc->Buffer.Pointer =
                ACPI_ALLOCATE (SourceDesc->Buffer.Length);
            if (!DestDesc->Buffer.Pointer)
            {
                return (AE_NO_MEMORY);
            }

            /* Copy the actual buffer data */

            ACPI_MEMCPY (DestDesc->Buffer.Pointer,
                    SourceDesc->Buffer.Pointer,
                    SourceDesc->Buffer.Length);
        }
        break;

    case ACPI_TYPE_STRING:
        /*
         * Allocate and copy the actual string if and only if:
         * 1) There is a valid string pointer
         * (Pointer to a NULL string is allowed)
         */
        if (SourceDesc->String.Pointer)
        {
            DestDesc->String.Pointer =
                ACPI_ALLOCATE ((ACPI_SIZE) SourceDesc->String.Length + 1);
            if (!DestDesc->String.Pointer)
            {
                return (AE_NO_MEMORY);
            }

            /* Copy the actual string data */

            ACPI_MEMCPY (DestDesc->String.Pointer, SourceDesc->String.Pointer,
                         (ACPI_SIZE) SourceDesc->String.Length + 1);
        }
        break;

    case ACPI_TYPE_LOCAL_REFERENCE:
        /*
         * We copied the reference object, so we now must add a reference
         * to the object pointed to by the reference
         *
         * DDBHandle reference (from Load/LoadTable is a special reference,
         * it's Reference.Object is the table index, so does not need to
         * increase the reference count
         */
        if (SourceDesc->Reference.Opcode == AML_LOAD_OP)
        {
            break;
        }

        AcpiUtAddReference (SourceDesc->Reference.Object);
        break;

    case ACPI_TYPE_REGION:
        /*
         * We copied the Region Handler, so we now must add a reference
         */
        if (DestDesc->Region.Handler)
        {
            AcpiUtAddReference (DestDesc->Region.Handler);
        }
        break;

    default:
        /* Nothing to do for other simple objects */
        break;
    }

    return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIelementToIelement
 *
 * PARAMETERS:  ACPI_PKG_CALLBACK
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy one package element to another package element
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyIelementToIelement (
    UINT8                   ObjectType,
    ACPI_OPERAND_OBJECT     *SourceObject,
    ACPI_GENERIC_STATE      *State,
    void                    *Context)
{
    ACPI_STATUS             Status = AE_OK;
    UINT32                  ThisIndex;
    ACPI_OPERAND_OBJECT     **ThisTargetPtr;
    ACPI_OPERAND_OBJECT     *TargetObject;


    ACPI_FUNCTION_ENTRY ();


    ThisIndex     = State->Pkg.Index;
    ThisTargetPtr = (ACPI_OPERAND_OBJECT **)
                        &State->Pkg.DestObject->Package.Elements[ThisIndex];

    switch (ObjectType)
    {
    case ACPI_COPY_TYPE_SIMPLE:

        /* A null source object indicates a (legal) null package element */

        if (SourceObject)
        {
            /*
             * This is a simple object, just copy it
             */
            TargetObject = AcpiUtCreateInternalObject (
                                ACPI_GET_OBJECT_TYPE (SourceObject));
            if (!TargetObject)
            {
                return (AE_NO_MEMORY);
            }

            Status = AcpiUtCopySimpleObject (SourceObject, TargetObject);
            if (ACPI_FAILURE (Status))
            {
                goto ErrorExit;
            }

            *ThisTargetPtr = TargetObject;
        }
        else
        {
            /* Pass through a null element */

            *ThisTargetPtr = NULL;
        }
        break;


    case ACPI_COPY_TYPE_PACKAGE:

        /*
         * This object is a package - go down another nesting level
         * Create and build the package object
         */
        TargetObject = AcpiUtCreatePackageObject (SourceObject->Package.Count);
        if (!TargetObject)
        {
            return (AE_NO_MEMORY);
        }

        TargetObject->Common.Flags = SourceObject->Common.Flags;

        /* Pass the new package object back to the package walk routine */

        State->Pkg.ThisTargetObj = TargetObject;

        /* Store the object pointer in the parent package object */

        *ThisTargetPtr = TargetObject;
        break;


    default:
        return (AE_BAD_PARAMETER);
    }

    return (Status);

ErrorExit:
    AcpiUtRemoveReference (TargetObject);
    return (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIpackageToIpackage
 *
 * PARAMETERS:  *SourceObj      - Pointer to the source package object
 *              *DestObj        - Where the internal object is returned
 *
 * RETURN:      Status          - the status of the call
 *
 * DESCRIPTION: This function is called to copy an internal package object
 *              into another internal package object.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyIpackageToIpackage (
    ACPI_OPERAND_OBJECT     *SourceObj,
    ACPI_OPERAND_OBJECT     *DestObj,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (UtCopyIpackageToIpackage);


    DestObj->Common.Type    = ACPI_GET_OBJECT_TYPE (SourceObj);
    DestObj->Common.Flags   = SourceObj->Common.Flags;
    DestObj->Package.Count  = SourceObj->Package.Count;

    /*
     * Create the object array and walk the source package tree
     */
    DestObj->Package.Elements = ACPI_ALLOCATE_ZEROED (
                                    ((ACPI_SIZE) SourceObj->Package.Count + 1) *
                                    sizeof (void *));
    if (!DestObj->Package.Elements)
    {
        ACPI_ERROR ((AE_INFO, "Package allocation failure"));
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /*
     * Copy the package element-by-element by walking the package "tree".
     * This handles nested packages of arbitrary depth.
     */
    Status = AcpiUtWalkPackageTree (SourceObj, DestObj,
                AcpiUtCopyIelementToIelement, WalkState);
    if (ACPI_FAILURE (Status))
    {
        /* On failure, delete the destination package object */

        AcpiUtRemoveReference (DestObj);
    }

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIobjectToIobject
 *
 * PARAMETERS:  WalkState           - Current walk state
 *              SourceDesc          - The internal object to be copied
 *              DestDesc            - Where the copied object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy an internal object to a new internal object
 *
 ******************************************************************************/

ACPI_STATUS
AcpiUtCopyIobjectToIobject (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_OPERAND_OBJECT     **DestDesc,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (UtCopyIobjectToIobject);


    /* Create the top level object */

    *DestDesc = AcpiUtCreateInternalObject (ACPI_GET_OBJECT_TYPE (SourceDesc));
    if (!*DestDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Copy the object and possible subobjects */

    if (ACPI_GET_OBJECT_TYPE (SourceDesc) == ACPI_TYPE_PACKAGE)
    {
        Status = AcpiUtCopyIpackageToIpackage (SourceDesc, *DestDesc,
                        WalkState);
    }
    else
    {
        Status = AcpiUtCopySimpleObject (SourceDesc, *DestDesc);
    }

    return_ACPI_STATUS (Status);
}