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# -*- coding: utf-8 -*-
#
# AWL simulator - blocks
# Copyright 2012-2013 Michael Buesch <m@bues.ch>
#
# Licensed under the terms of the GNU General Public License version 2.
#
from awllabels import *
from awlstruct import *
from util import *
class BlockInterface(object):
class Field(object):
enum.start = -1
FTYPE_UNKNOWN = enum.item
FTYPE_IN = enum.item
FTYPE_OUT = enum.item
FTYPE_INOUT = enum.item
FTYPE_STAT = enum.item
FTYPE_TEMP = enum.item
enum.end
def __init__(self, name, dataType, initialValue=None):
self.name = name
self.dataType = dataType
self.fieldType = self.FTYPE_UNKNOWN
self.initialValue = initialValue
def __init__(self):
self.struct = None # Instance-DB structure (IN, OUT, INOUT, STAT)
self.tempStruct = None # Local-stack structure (TEMP)
self.fieldNameMap = {}
self.fields_IN = []
self.fields_OUT = []
self.fields_INOUT = []
self.fields_STAT = []
self.fields_TEMP = []
self.interfaceFieldCount = 0
self.staticFieldCount = 0
self.tempFieldCount = 0
def __addField(self, field):
if field.name in self.fieldNameMap:
raise AwlSimError("Data structure name '%s' is ambiguous." %\
field.name)
if field.fieldType == BlockInterface.Field.FTYPE_TEMP:
self.tempFieldCount += 1
elif field.fieldType == BlockInterface.Field.FTYPE_STAT:
self.staticFieldCount += 1
else:
self.interfaceFieldCount += 1
self.fieldNameMap[field.name] = field
def addField_IN(self, field):
field.fieldType = field.FTYPE_IN
self.__addField(field)
self.fields_IN.append(field)
def addField_OUT(self, field):
field.fieldType = field.FTYPE_OUT
self.__addField(field)
self.fields_OUT.append(field)
def addField_INOUT(self, field):
field.fieldType = field.FTYPE_INOUT
self.__addField(field)
self.fields_INOUT.append(field)
def addField_STAT(self, field):
field.fieldType = field.FTYPE_STAT
self.__addField(field)
self.fields_STAT.append(field)
def addField_TEMP(self, field):
field.fieldType = field.FTYPE_TEMP
self.__addField(field)
self.fields_TEMP.append(field)
def __buildField(self, struct, field, isFirst):
if isFirst:
struct.addFieldAligned(field.name,
field.dataType.width, 2)
else:
struct.addFieldNaturallyAligned(field.name,
field.dataType.width)
def buildDataStructure(self):
# Build interface-DB structure
self.struct = AwlStruct()
for i, field in enumerate(self.fields_IN):
self.__buildField(self.struct, field, i==0)
for i, field in enumerate(self.fields_OUT):
self.__buildField(self.struct, field, i==0)
for i, field in enumerate(self.fields_INOUT):
self.__buildField(self.struct, field, i==0)
for i, field in enumerate(self.fields_STAT):
self.__buildField(self.struct, field, i==0)
# Build local-stack structure
self.tempStruct = AwlStruct()
for i, field in enumerate(self.fields_TEMP):
self.__buildField(self.tempStruct, field, i==0)
def getFieldByName(self, name):
try:
return self.fieldNameMap[name]
except KeyError:
raise AwlSimError("Data structure field '%s' does not exist." %\
name)
def __repr__(self):
ret = []
for flist, fname in ((self.fields_IN, "VAR_IN"),
(self.fields_OUT, "VAR_OUT"),
(self.fields_INOUT, "VAR_IN_OUT")):
if not flist:
continue
ret.append(fname)
for field in flist:
ret.append(" %s : %s;" %\
(field.name, str(field.dataType)))
ret.append("END_VAR")
return '\n'.join(ret)
class Block(object):
def __init__(self, insns, index, interface):
self.insns = insns
self.labels = None
self.index = index
if insns:
self.labels = AwlLabel.resolveLabels(insns)
self.interface = interface
def __repr__(self):
return "Block %d" % self.index
class OBInterface(BlockInterface):
def addField_IN(self, field):
raise AwlSimError("VAR_INPUT not possible in an OB")
def addField_OUT(self, field):
raise AwlSimError("VAR_OUTPUT not possible in an OB")
def addField_INOUT(self, field):
raise AwlSimError("VAR_IN_OUT not possible in an OB")
def addField_STAT(self, field):
raise AwlSimError("Static VAR not possible in an OB")
class OB(Block):
def __init__(self, insns, index):
Block.__init__(self, insns, index, OBInterface())
def __repr__(self):
return "OB %d" % self.index
class FBInterface(BlockInterface):
pass
class FB(Block):
def __init__(self, insns, index):
Block.__init__(self, insns, index, FBInterface())
def __repr__(self):
return "FB %d" % self.index
class SFBInterface(FBInterface):
pass
class SFB(Block):
def __init__(self, index):
Block.__init__(self, None, index, SFBInterface())
def run(self, cpu, dbOper):
pass # Reimplement this method
def __repr__(self):
return "SFB %d" % self.index
class FCInterface(BlockInterface):
def addField_STAT(self, field):
raise AwlSimError("Static VAR not possible in an FC")
class FC(Block):
def __init__(self, insns, index):
Block.__init__(self, insns, index, FCInterface())
def __repr__(self):
return "FC %d" % self.index
class SFCInterface(FCInterface):
pass
class SFC(Block):
def __init__(self, index):
Block.__init__(self, None, index, SFCInterface())
def run(self, cpu):
pass # Reimplement this method
def __repr__(self):
return "SFC %d" % self.index
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