utcopy.c

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		}
		break;

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

		return_ACPI_STATUS(AE_SUPPORT);
	}

	/* Must COPY string and buffer contents */

	switch (external_object->type) {
	case ACPI_TYPE_STRING:

		internal_object->string.pointer =
		    ACPI_ALLOCATE_ZEROED((acpi_size) external_object->string.
					 length + 1);
		if (!internal_object->string.pointer) {
			goto error_exit;
		}

		ACPI_MEMCPY(internal_object->string.pointer,
			    external_object->string.pointer,
			    external_object->string.length);

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

	case ACPI_TYPE_BUFFER:

		internal_object->buffer.pointer =
		    ACPI_ALLOCATE_ZEROED(external_object->buffer.length);
		if (!internal_object->buffer.pointer) {
			goto error_exit;
		}

		ACPI_MEMCPY(internal_object->buffer.pointer,
			    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);
}

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

static acpi_status
acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object,
				  union acpi_operand_object **internal_object)
{
	acpi_status status = AE_OK;
	union acpi_operand_object *package_object;
	union acpi_operand_object **package_elements;
	acpi_native_uint i;

	ACPI_FUNCTION_TRACE(ut_copy_epackage_to_ipackage);

	/* Create the package object */

	package_object =
	    acpi_ut_create_package_object(external_object->package.count);
	if (!package_object) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	package_elements = package_object->package.elements;

	/*
	 * Recursive implementation. Probably ok, since nested external packages
	 * as parameters should be very rare.
	 */
	for (i = 0; i < external_object->package.count; i++) {
		status =
		    acpi_ut_copy_eobject_to_iobject(&external_object->package.
						    elements[i],
						    &package_elements[i]);
		if (ACPI_FAILURE(status)) {

			/* Truncate package and delete it */

			package_object->package.count = i;
			package_elements[i] = NULL;
			acpi_ut_remove_reference(package_object);
			return_ACPI_STATUS(status);
		}
	}

	*internal_object = package_object;
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_copy_eobject_to_iobject
 *
 * PARAMETERS:  external_object     - The external object to be converted
 *              internal_object     - 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) {
		status =
		    acpi_ut_copy_epackage_to_ipackage(external_object,
						      internal_object);
	} 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.
 *
 ******************************************************************************/

static 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;

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

	dest_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;

	/* Handle the objects with extra data */

	switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
	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 ((source_desc->buffer.pointer) &&
		    (source_desc->buffer.length)) {
			dest_desc->buffer.pointer =
			    ACPI_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
		 * (Pointer to a NULL string is allowed)
		 */
		if (source_desc->string.pointer) {
			dest_desc->string.pointer =
			    ACPI_ALLOCATE((acpi_size) source_desc->string.
					  length + 1);
			if (!dest_desc->string.pointer) {
				return (AE_NO_MEMORY);
			}

			/* Copy the actual string data */

			ACPI_MEMCPY(dest_desc->string.pointer,
				    source_desc->string.pointer,
				    (acpi_size) source_desc->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
		 */
		acpi_ut_add_reference(source_desc->reference.object);
		break;

	case ACPI_TYPE_REGION:
		/*
		 * We copied the Region Handler, so we now must add a reference
		 */
		if (dest_desc->region.handler) {
			acpi_ut_add_reference(dest_desc->region.handler);
		}
		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
 *
 ******************************************************************************/

static 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_package_object(source_object->package.count);
		if (!target_object) {
			return (AE_NO_MEMORY);
		}

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

		/* 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.
 *
 ******************************************************************************/

static 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_ALLOCATE_ZEROED(((acpi_size)
							   source_obj->package.
							   count +
							   1) * sizeof(void *));
	if (!dest_obj->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 = 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);
}