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# -*- coding: utf-8 -*-
#
# AWL simulator - call parameters
# Copyright 2013 Michael Buesch <m@bues.ch>
#
# Licensed under the terms of the GNU General Public License version 2.
#
from awlblocks import *
from util import *
class AwlParamAssign(object):
"Parameter assignment for CALL"
DIR_UNKNOWN = -1 # magic value: Unknown direction
DIR_IN = 0x1 # in-bitmask
DIR_OUT = 0x2 # out-bitmask
def __init__(self, lvalueName, rvalueOp):
self.lvalueName = lvalueName
self.rvalueOp = rvalueOp
self.direction = self.DIR_UNKNOWN
def __setDirection(self, interface):
self.direction = 0
field = interface.getFieldByName(self.lvalueName)
if field.fieldType == BlockInterface.Field.FTYPE_IN or\
field.fieldType == BlockInterface.Field.FTYPE_INOUT:
self.direction |= self.DIR_IN
if field.fieldType == BlockInterface.Field.FTYPE_OUT or\
field.fieldType == BlockInterface.Field.FTYPE_INOUT:
self.direction |= self.DIR_OUT
def isInbound(self, interface):
if self.direction == self.DIR_UNKNOWN:
self.__setDirection(interface)
return self.direction & self.DIR_IN
def isOutbound(self, interface):
if self.direction == self.DIR_UNKNOWN:
self.__setDirection(interface)
return self.direction & self.DIR_OUT
def __repr__(self):
return "%s := %s" % (self.lvalueName, str(self.rvalueOp))
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