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# -*- coding: utf-8 -*-
#
# AWL simulator - call parameters
#
# Copyright 2013-2014 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
#from awlsim.core.dynattrs cimport * #@cy
from awlsim.core.datastructure import *
from awlsim.core.datablocks import *
from awlsim.core.blocks import *
from awlsim.core.util import *
from awlsim.core.dynattrs import * #@nocy
class AwlParamAssign(DynAttrs):
"Parameter assignment for CALL"
dynAttrs = {
# isInbound attribute is True, if this is an
# IN or IN_OUT parameter assignment.
"isInbound" : lambda self, name: self.__isInbound(),
# isOutbound attribute is True, if this is an
# OUT or IN_OUT parameter assignment.
"isOutbound" : lambda self, name: self.__isOutbound(),
# lValueStructField attribute is the AwlStructField corresponding
# to this parameter's l-value.
"lValueStructField" : lambda self, name: self.__lValueStructField(),
# interfaceFieldIndex attribute is the index number for the
# parameter assignment l-value in the block interface refs.
"interfaceFieldIndex" : lambda self, name: self.__interfaceFieldIndex(),
# scratchSpaceOp attribute holds the possible AwlOperator for
# scratch space allocation.
"scratchSpaceOp" : None,
}
def __init__(self, lvalueName, rvalueOp):
# A parameter assignment consists of an lvalue and an rvalue:
# LVALUE := RVALUE
# 'lvalueName' is the name string of the lvalue.
# 'rvalueOp' is the AwlOperator that represents the rvalue.
self.lvalueName = lvalueName
self.rvalueOp = rvalueOp
# 'interface' is the BlockInterface of the called block.
# This element is assigned later in the translation phase.
self.interface = None
def __isInbound(self):
field = self.interface.getFieldByName(self.lvalueName)
return field.fieldType == BlockInterfaceField.FTYPE_IN or\
field.fieldType == BlockInterfaceField.FTYPE_INOUT
def __isOutbound(self):
field = self.interface.getFieldByName(self.lvalueName)
return field.fieldType == BlockInterfaceField.FTYPE_OUT or\
field.fieldType == BlockInterfaceField.FTYPE_INOUT
def __lValueStructField(self):
# Find the l-value struct field
return self.interface.struct.getField(self.lvalueName)
def __interfaceFieldIndex(self):
# Find the index number for the l-value
return self.interface.getFieldIndex(self.lvalueName)
def __repr__(self):
return "%s := %s" % (self.lvalueName, str(self.rvalueOp))
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