utcopy.c

h内核

				  external_object->buffer.pointer,
				  external_object->buffer.length);

		internal_object->buffer.length = external_object->buffer.length;
		break;


	case ACPI_TYPE_INTEGER:

		internal_object->integer.value  = external_object->integer.value;
		break;

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

	*ret_internal_object = internal_object;
	return_ACPI_STATUS (AE_OK);


error_exit:
	acpi_ut_remove_reference (internal_object);
	return_ACPI_STATUS (AE_NO_MEMORY);
}


#ifdef ACPI_FUTURE_IMPLEMENTATION

/* Code to convert packages that are parameters to control methods */

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_copy_epackage_to_ipackage
 *
 * PARAMETERS:  *internal_object   - Pointer to the object we are returning
 *              *Buffer            - Where the object is returned
 *              *space_used        - Where the length of the object 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
 *              acpi_ut_get_object_size function before calling this function.
 *
 ******************************************************************************/

static acpi_status
acpi_ut_copy_epackage_to_ipackage (
	union acpi_operand_object       *internal_object,
	u8                              *buffer,
	u32                             *space_used)
{
	u8                              *free_space;
	union acpi_object               *external_object;
	u32                             length = 0;
	u32                             this_index;
	u32                             object_space = 0;
	union acpi_operand_object       *this_internal_obj;
	union acpi_object               *this_external_obj;


	ACPI_FUNCTION_TRACE ("ut_copy_epackage_to_ipackage");


	/*
	 * First package at head of the buffer
	 */
	external_object = (union acpi_object *)buffer;

	/*
	 * Free space begins right after the first package
	 */
	free_space = buffer + sizeof(union acpi_object);


	external_object->type              = ACPI_GET_OBJECT_TYPE (internal_object);
	external_object->package.count     = internal_object->package.count;
	external_object->package.elements  = (union acpi_object *)free_space;

	/*
	 * Build an array of ACPI_OBJECTS in the buffer
	 * and move the free space past it
	 */
	free_space += external_object->package.count * sizeof(union acpi_object);


	/* Call walk_package */

}

#endif /* Future implementation */


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

acpi_status
acpi_ut_copy_eobject_to_iobject (
	union acpi_object               *external_object,
	union acpi_operand_object       **internal_object)
{
	acpi_status                     status;


	ACPI_FUNCTION_TRACE ("ut_copy_eobject_to_iobject");


	if (external_object->type == ACPI_TYPE_PACKAGE) {
		/*
		 * Packages as external input to control methods are not supported,
		 */
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
			"Packages as parameters not implemented!\n"));

		return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
	}

	else {
		/*
		 * Build a simple object (no nested objects)
		 */
		status = acpi_ut_copy_esimple_to_isimple (external_object, internal_object);
	}

	return_ACPI_STATUS (status);
}


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

acpi_status
acpi_ut_copy_simple_object (
	union acpi_operand_object       *source_desc,
	union acpi_operand_object       *dest_desc)
{
	u16                             reference_count;
	union acpi_operand_object       *next_object;


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

	reference_count = dest_desc->common.reference_count;
	next_object = dest_desc->common.next_object;

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

	ACPI_MEMCPY ((char *) dest_desc, (char *) source_desc,
			  sizeof (union acpi_operand_object));

	/* Restore the saved fields */

	dest_desc->common.reference_count = reference_count;
	dest_desc->common.next_object = next_object;

	/* Handle the objects with extra data */

	switch (ACPI_GET_OBJECT_TYPE (dest_desc)) {
	case ACPI_TYPE_BUFFER:

		dest_desc->buffer.node = NULL;
		dest_desc->common.flags = source_desc->common.flags;

		/*
		 * Allocate and copy the actual buffer if and only if:
		 * 1) There is a valid buffer pointer
		 * 2) The buffer is not static (not in an ACPI table) (in this case,
		 *    the actual pointer was already copied above)
		 */
		if ((source_desc->buffer.pointer) &&
			(!(source_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
			dest_desc->buffer.pointer = NULL;

			/* Create an actual buffer only if length > 0 */

			if (source_desc->buffer.length) {
				dest_desc->buffer.pointer = ACPI_MEM_ALLOCATE (source_desc->buffer.length);
				if (!dest_desc->buffer.pointer) {
					return (AE_NO_MEMORY);
				}

				/* Copy the actual buffer data */

				ACPI_MEMCPY (dest_desc->buffer.pointer, source_desc->buffer.pointer,
						  source_desc->buffer.length);
			}
		}
		break;

	case ACPI_TYPE_STRING:

		/*
		 * Allocate and copy the actual string if and only if:
		 * 1) There is a valid string pointer
		 * 2) The string is not static (not in an ACPI table) (in this case,
		 *    the actual pointer was already copied above)
		 */
		if ((source_desc->string.pointer) &&
			(!(source_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
			dest_desc->string.pointer = ACPI_MEM_ALLOCATE ((acpi_size) source_desc->string.length + 1);
			if (!dest_desc->string.pointer) {
				return (AE_NO_MEMORY);
			}

			ACPI_MEMCPY (dest_desc->string.pointer, source_desc->string.pointer,
					  (acpi_size) source_desc->string.length + 1);
		}
		break;

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

	return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_copy_ielement_to_ielement
 *
 * PARAMETERS:  acpi_pkg_callback
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy one package element to another package element
 *
 ******************************************************************************/

acpi_status
acpi_ut_copy_ielement_to_ielement (
	u8                              object_type,
	union acpi_operand_object       *source_object,
	union acpi_generic_state        *state,
	void                            *context)
{
	acpi_status                     status = AE_OK;
	u32                             this_index;
	union acpi_operand_object       **this_target_ptr;
	union acpi_operand_object       *target_object;


	ACPI_FUNCTION_ENTRY ();


	this_index    = state->pkg.index;
	this_target_ptr = (union acpi_operand_object **)
			   &state->pkg.dest_object->package.elements[this_index];

	switch (object_type) {
	case ACPI_COPY_TYPE_SIMPLE:

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

		if (source_object) {
			/*
			 * This is a simple object, just copy it
			 */
			target_object = acpi_ut_create_internal_object (
					   ACPI_GET_OBJECT_TYPE (source_object));
			if (!target_object) {
				return (AE_NO_MEMORY);
			}

			status = acpi_ut_copy_simple_object (source_object, target_object);
			if (ACPI_FAILURE (status)) {
				goto error_exit;
			}

			*this_target_ptr = target_object;
		}
		else {
			/* Pass through a null element */

			*this_target_ptr = NULL;
		}
		break;


	case ACPI_COPY_TYPE_PACKAGE:

		/*
		 * This object is a package - go down another nesting level
		 * Create and build the package object
		 */
		target_object = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
		if (!target_object) {
			return (AE_NO_MEMORY);
		}

		target_object->package.count = source_object->package.count;
		target_object->common.flags = source_object->common.flags;

		/*
		 * Create the object array
		 */
		target_object->package.elements =
			ACPI_MEM_CALLOCATE (((acpi_size) source_object->package.count + 1) *
					 sizeof (void *));
		if (!target_object->package.elements) {
			status = AE_NO_MEMORY;
			goto error_exit;
		}

		/*
		 * Pass the new package object back to the package walk routine
		 */
		state->pkg.this_target_obj = target_object;

		/*
		 * Store the object pointer in the parent package object
		 */
		*this_target_ptr = target_object;
		break;


	default:
		return (AE_BAD_PARAMETER);
	}

	return (status);

error_exit:
	acpi_ut_remove_reference (target_object);
	return (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_copy_ipackage_to_ipackage
 *
 * PARAMETERS:  *source_obj     - Pointer to the source package object
 *              *dest_obj       - 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.
 *
 ******************************************************************************/

acpi_status
acpi_ut_copy_ipackage_to_ipackage (
	union acpi_operand_object       *source_obj,
	union acpi_operand_object       *dest_obj,
	struct acpi_walk_state          *walk_state)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ut_copy_ipackage_to_ipackage");


	dest_obj->common.type   = ACPI_GET_OBJECT_TYPE (source_obj);
	dest_obj->common.flags  = source_obj->common.flags;
	dest_obj->package.count = source_obj->package.count;

	/*
	 * Create the object array and walk the source package tree
	 */
	dest_obj->package.elements = ACPI_MEM_CALLOCATE (
			   ((acpi_size) source_obj->package.count + 1) *
			   sizeof (void *));
	if (!dest_obj->package.elements) {
		ACPI_REPORT_ERROR (
			("aml_build_copy_internal_package_object: Package allocation failure\n"));
		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 = acpi_ut_walk_package_tree (source_obj, dest_obj,
			 acpi_ut_copy_ielement_to_ielement, walk_state);
	if (ACPI_FAILURE (status)) {
		/* On failure, delete the destination package object */

		acpi_ut_remove_reference (dest_obj);
	}

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_copy_iobject_to_iobject
 *
 * PARAMETERS:  walk_state          - Current walk state
 *              source_desc         - The internal object to be copied
 *              dest_desc           - Where the copied object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Copy an internal object to a new internal object
 *
 ******************************************************************************/

acpi_status
acpi_ut_copy_iobject_to_iobject (
	union acpi_operand_object       *source_desc,
	union acpi_operand_object       **dest_desc,
	struct acpi_walk_state          *walk_state)
{
	acpi_status                     status = AE_OK;


	ACPI_FUNCTION_TRACE ("ut_copy_iobject_to_iobject");


	/* Create the top level object */

	*dest_desc = acpi_ut_create_internal_object (ACPI_GET_OBJECT_TYPE (source_desc));
	if (!*dest_desc) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	/* Copy the object and possible subobjects */

	if (ACPI_GET_OBJECT_TYPE (source_desc) == ACPI_TYPE_PACKAGE) {
		status = acpi_ut_copy_ipackage_to_ipackage (source_desc, *dest_desc,
				  walk_state);
	}
	else {
		status = acpi_ut_copy_simple_object (source_desc, *dest_desc);
	}

	return_ACPI_STATUS (status);
}