utcopy.c

linux-2.6.15.6

	switch (external_object->type) {
	case ACPI_TYPE_STRING:

		internal_object->string.pointer =
		    ACPI_MEM_CALLOCATE((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_MEM_CALLOCATE(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);
}

#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.
 *
 ******************************************************************************/

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_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
		 * (Pointer to a NULL string is allowed)
		 */
		if (source_desc->string.pointer) {
			dest_desc->string.pointer =
			    ACPI_MEM_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;

	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_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.
 *
 ******************************************************************************/

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_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);
}