utcopy.c

acpi tools for linux include acpiexec and acpixtract

            return (Status);
        }
        break;


    case ACPI_COPY_TYPE_PACKAGE:

        /*
         * Build the package object
         */
        TargetObject->Type              = ACPI_TYPE_PACKAGE;
        TargetObject->Package.Count     = SourceObject->Package.Count;
        TargetObject->Package.Elements  =
            ACPI_CAST_PTR (ACPI_OBJECT, Info->FreeSpace);

        /*
         * Pass the new package object back to the package walk routine
         */
        State->Pkg.ThisTargetObj = TargetObject;

        /*
         * Save space for the array of objects (Package elements)
         * update the buffer length counter
         */
        ObjectSpace = ACPI_ROUND_UP_TO_NATIVE_WORD (
                            (ACPI_SIZE) TargetObject->Package.Count *
                            sizeof (ACPI_OBJECT));
        break;


    default:
        return (AE_BAD_PARAMETER);
    }

    Info->FreeSpace   += ObjectSpace;
    Info->Length      += ObjectSpace;
    return (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIpackageToEpackage
 *
 * PARAMETERS:  InternalObject      - Pointer to the object we are returning
 *              Buffer              - Where the object is returned
 *              SpaceUsed           - Where the object length is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to place a package object in a user
 *              buffer.  A package object by definition contains other objects.
 *
 *              The buffer is assumed to have sufficient space for the object.
 *              The caller must have verified the buffer length needed using the
 *              AcpiUtGetObjectSize function before calling this function.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyIpackageToEpackage (
    ACPI_OPERAND_OBJECT     *InternalObject,
    UINT8                   *Buffer,
    ACPI_SIZE               *SpaceUsed)
{
    ACPI_OBJECT             *ExternalObject;
    ACPI_STATUS             Status;
    ACPI_PKG_INFO           Info;


    ACPI_FUNCTION_TRACE (UtCopyIpackageToEpackage);


    /*
     * First package at head of the buffer
     */
    ExternalObject = ACPI_CAST_PTR (ACPI_OBJECT, Buffer);

    /*
     * Free space begins right after the first package
     */
    Info.Length      = ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
    Info.FreeSpace   = Buffer + ACPI_ROUND_UP_TO_NATIVE_WORD (
                                    sizeof (ACPI_OBJECT));
    Info.ObjectSpace = 0;
    Info.NumPackages = 1;

    ExternalObject->Type             = ACPI_GET_OBJECT_TYPE (InternalObject);
    ExternalObject->Package.Count    = InternalObject->Package.Count;
    ExternalObject->Package.Elements = ACPI_CAST_PTR (ACPI_OBJECT,
                                            Info.FreeSpace);

    /*
     * Leave room for an array of ACPI_OBJECTS in the buffer
     * and move the free space past it
     */
    Info.Length    += (ACPI_SIZE) ExternalObject->Package.Count *
                            ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
    Info.FreeSpace += ExternalObject->Package.Count *
                            ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));

    Status = AcpiUtWalkPackageTree (InternalObject, ExternalObject,
                AcpiUtCopyIelementToEelement, &Info);

    *SpaceUsed = Info.Length;
    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyIobjectToEobject
 *
 * PARAMETERS:  InternalObject      - The internal object to be converted
 *              BufferPtr           - Where the object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to build an API object to be returned to
 *              the caller.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiUtCopyIobjectToEobject (
    ACPI_OPERAND_OBJECT     *InternalObject,
    ACPI_BUFFER             *RetBuffer)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (UtCopyIobjectToEobject);


    if (ACPI_GET_OBJECT_TYPE (InternalObject) == ACPI_TYPE_PACKAGE)
    {
        /*
         * Package object:  Copy all subobjects (including
         * nested packages)
         */
        Status = AcpiUtCopyIpackageToEpackage (InternalObject,
                        RetBuffer->Pointer, &RetBuffer->Length);
    }
    else
    {
        /*
         * Build a simple object (no nested objects)
         */
        Status = AcpiUtCopyIsimpleToEsimple (InternalObject,
                    ACPI_CAST_PTR (ACPI_OBJECT, RetBuffer->Pointer),
                    ACPI_ADD_PTR (UINT8, RetBuffer->Pointer,
                        ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT))),
                    &RetBuffer->Length);
        /*
         * build simple does not include the object size in the length
         * so we add it in here
         */
        RetBuffer->Length += sizeof (ACPI_OBJECT);
    }

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyEsimpleToIsimple
 *
 * PARAMETERS:  ExternalObject      - The external object to be converted
 *              RetInternalObject   - Where the internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function copies an external object to an internal one.
 *              NOTE: Pointers can be copied, we don't need to copy data.
 *              (The pointers have to be valid in our address space no matter
 *              what we do with them!)
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyEsimpleToIsimple (
    ACPI_OBJECT             *ExternalObject,
    ACPI_OPERAND_OBJECT     **RetInternalObject)
{
    ACPI_OPERAND_OBJECT     *InternalObject;


    ACPI_FUNCTION_TRACE (UtCopyEsimpleToIsimple);


    /*
     * Simple types supported are: String, Buffer, Integer
     */
    switch (ExternalObject->Type)
    {
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:
    case ACPI_TYPE_INTEGER:

        InternalObject = AcpiUtCreateInternalObject (
                            (UINT8) ExternalObject->Type);
        if (!InternalObject)
        {
            return_ACPI_STATUS (AE_NO_MEMORY);
        }
        break;

    default:
        /* All other types are not supported */

        ACPI_ERROR ((AE_INFO, "Unsupported object type, cannot convert to internal object: %s",
            AcpiUtGetTypeName (ExternalObject->Type)));

        return_ACPI_STATUS (AE_SUPPORT);
    }


    /* Must COPY string and buffer contents */

    switch (ExternalObject->Type)
    {
    case ACPI_TYPE_STRING:

        InternalObject->String.Pointer =
            ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) ExternalObject->String.Length + 1);
        if (!InternalObject->String.Pointer)
        {
            goto ErrorExit;
        }

        ACPI_MEMCPY (InternalObject->String.Pointer,
                     ExternalObject->String.Pointer,
                     ExternalObject->String.Length);

        InternalObject->String.Length  = ExternalObject->String.Length;
        break;


    case ACPI_TYPE_BUFFER:

        InternalObject->Buffer.Pointer =
            ACPI_ALLOCATE_ZEROED (ExternalObject->Buffer.Length);
        if (!InternalObject->Buffer.Pointer)
        {
            goto ErrorExit;
        }

        ACPI_MEMCPY (InternalObject->Buffer.Pointer,
                     ExternalObject->Buffer.Pointer,
                     ExternalObject->Buffer.Length);

        InternalObject->Buffer.Length  = ExternalObject->Buffer.Length;

        /* Mark buffer data valid */

        InternalObject->Buffer.Flags |= AOPOBJ_DATA_VALID;
        break;


    case ACPI_TYPE_INTEGER:

        InternalObject->Integer.Value   = ExternalObject->Integer.Value;
        break;

    default:
        /* Other types can't get here */
        break;
    }

    *RetInternalObject = InternalObject;
    return_ACPI_STATUS (AE_OK);


ErrorExit:
    AcpiUtRemoveReference (InternalObject);
    return_ACPI_STATUS (AE_NO_MEMORY);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyEpackageToIpackage
 *
 * PARAMETERS:  ExternalObject      - The external object to be converted
 *              InternalObject      - Where the internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy an external package object to an internal package.
 *              Handles nested packages.
 *
 ******************************************************************************/

static ACPI_STATUS
AcpiUtCopyEpackageToIpackage (
    ACPI_OBJECT             *ExternalObject,
    ACPI_OPERAND_OBJECT     **InternalObject)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *PackageObject;
    ACPI_OPERAND_OBJECT     **PackageElements;
    ACPI_NATIVE_UINT        i;


    ACPI_FUNCTION_TRACE (UtCopyEpackageToIpackage);


    /* Create the package object */

    PackageObject = AcpiUtCreatePackageObject (ExternalObject->Package.Count);
    if (!PackageObject)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    PackageElements = PackageObject->Package.Elements;

    /*
     * Recursive implementation. Probably ok, since nested external packages
     * as parameters should be very rare.
     */
    for (i = 0; i < ExternalObject->Package.Count; i++)
    {
        Status = AcpiUtCopyEobjectToIobject (
                    &ExternalObject->Package.Elements[i],
                    &PackageElements[i]);
        if (ACPI_FAILURE (Status))
        {
            /* Truncate package and delete it */

            PackageObject->Package.Count = (UINT32) i;
            PackageElements[i] = NULL;
            AcpiUtRemoveReference (PackageObject);
            return_ACPI_STATUS (Status);
        }
    }

    /* Mark package data valid */
    
    PackageObject->Package.Flags |= AOPOBJ_DATA_VALID;

    *InternalObject = PackageObject;
    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiUtCopyEobjectToIobject
 *
 * PARAMETERS:  ExternalObject      - The external object to be converted
 *              InternalObject      - Where the internal object is returned
 *
 * RETURN:      Status              - the status of the call
 *
 * DESCRIPTION: Converts an external object to an internal object.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiUtCopyEobjectToIobject (
    ACPI_OBJECT             *ExternalObject,
    ACPI_OPERAND_OBJECT     **InternalObject)
{