plcopen/structures.py
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Thu, 09 Aug 2018 14:00:14 +0300
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child 2441 c553769a65af
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Update README with instruction to build BACnet library for BACnet support
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# This file is part of Beremiz, a Integrated Development Environment for
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
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#
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
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#
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# See COPYING file for copyrights details.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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from __future__ import absolute_import
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import string
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import re
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from collections import OrderedDict
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from plcopen.plcopen import LoadProject
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from plcopen.definitions import *
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TypeHierarchy = dict(TypeHierarchy_list)
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def IsOfType(type, reference):
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    """
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    Returns true if the given data type is the same that "reference" meta-type or one of its types.
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    """
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    if reference is None:
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        return True
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    elif type == reference:
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        return True
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    else:
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        parent_type = TypeHierarchy[type]
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        if parent_type is not None:
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            return IsOfType(parent_type, reference)
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    return False
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def GetSubTypes(type):
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    """
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    Returns list of all types that correspont to the ANY* meta type
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    """
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    return [typename for typename, _parenttype in TypeHierarchy.items() if not typename.startswith("ANY") and IsOfType(typename, type)]
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DataTypeRange = dict(DataTypeRange_list)
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"""
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Ordered list of common Function Blocks defined in the IEC 61131-3
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Each block have this attributes:
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    - "name" : The block name
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    - "type" : The block type. It can be "function", "functionBlock" or "program"
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    - "extensible" : Boolean that define if the block is extensible
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    - "inputs" : List of the block inputs
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    - "outputs" : List of the block outputs
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    - "comment" : Comment that will be displayed in the block popup
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    - "generate" : Method that generator will call for generating ST block code
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Inputs and outputs are a tuple of characteristics that are in order:
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    - The name
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    - The data type
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    - The default modifier which can be "none", "negated", "rising" or "falling"
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"""
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StdBlckLibs = {libname: LoadProject(tc6fname)[0]
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               for libname, tc6fname in StdTC6Libs}
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StdBlckLst = [{"name": libname, "list":
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               [GetBlockInfos(pous) for pous in lib.getpous()]}
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              for libname, lib in StdBlckLibs.iteritems()]
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# -------------------------------------------------------------------------------
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#                             Test identifier
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# -------------------------------------------------------------------------------
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IDENTIFIER_MODEL = re.compile(
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    "(?:%(letter)s|_(?:%(letter)s|%(digit)s))(?:_?(?:%(letter)s|%(digit)s))*$" %
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    {"letter": "[a-zA-Z]", "digit": "[0-9]"})
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def TestIdentifier(identifier):
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    """
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    Test if identifier is valid
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    """
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    return IDENTIFIER_MODEL.match(identifier) is not None
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# -------------------------------------------------------------------------------
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#                        Standard functions list generation
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# -------------------------------------------------------------------------------
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def csv_file_to_table(file):
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    """
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    take a .csv file and translate it it a "csv_table"
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    """
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    return [map(string.strip, line.split(';')) for line in file.xreadlines()]
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def find_section(section_name, table):
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    """
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    seek into the csv table to a section ( section_name match 1st field )
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    return the matching row without first field
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    """
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    fields = [None]
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    while fields[0] != section_name:
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        fields = table.pop(0)
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    return fields[1:]
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def get_standard_funtions_input_variables(table):
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    """
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    extract the standard functions standard parameter names and types...
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    return a { ParameterName: Type, ...}
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    """
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    variables = find_section("Standard_functions_variables_types", table)
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    standard_funtions_input_variables = {}
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    fields = [True, True]
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    while fields[1]:
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        fields = table.pop(0)
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        variable_from_csv = dict([(champ, val) for champ, val in zip(variables, fields[1:]) if champ != ''])
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        standard_funtions_input_variables[variable_from_csv['name']] = variable_from_csv['type']
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    return standard_funtions_input_variables
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   135
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def csv_input_translate(str_decl, variables, base):
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    """
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    translate .csv file input declaration into PLCOpenEditor interessting values
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    in : "(ANY_NUM, ANY_NUM)" and { ParameterName: Type, ...}
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    return [("IN1","ANY_NUM","none"),("IN2","ANY_NUM","none")]
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    """
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    decl = str_decl.replace('(', '').replace(')', '').replace(' ', '').split(',')
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    params = []
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    len_of_not_predifined_variable = len([True for param_type in decl if param_type not in variables])
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    for param_type in decl:
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        if param_type in variables.keys():
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            param_name = param_type
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            param_type = variables[param_type]
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        elif len_of_not_predifined_variable > 1:
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            param_name = "IN%d" % base
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            base += 1
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        else:
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            param_name = "IN"
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        params.append((param_name, param_type, "none"))
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    return params
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def get_standard_funtions(table):
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    """
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    Returns this kind of declaration for all standard functions
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            [{"name" : "Numerical", 'list': [   {
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                'baseinputnumber': 1,
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                'comment': 'Addition',
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                'extensible': True,
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                'inputs': [   ('IN1', 'ANY_NUM', 'none'),
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                              ('IN2', 'ANY_NUM', 'none')],
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                'name': 'ADD',
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                'outputs': [('OUT', 'ANY_NUM', 'none')],
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                'type': 'function'}, ...... ] },.....]
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    """
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    variables = get_standard_funtions_input_variables(table)
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    fonctions = find_section("Standard_functions_type", table)
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    Standard_Functions_Decl = []
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    Current_section = None
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    translate = {
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        "extensible": lambda x: {"yes": True, "no": False}[x],
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        "inputs": lambda x: csv_input_translate(x, variables, baseinputnumber),
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        "outputs": lambda x: [("OUT", x, "none")]}
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    for fields in table:
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        if fields[1]:
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            # If function section name given
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            if fields[0]:
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                words = fields[0].split('"')
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                if len(words) > 1:
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                    section_name = words[1]
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                else:
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                    section_name = fields[0]
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                Current_section = {"name": section_name, "list": []}
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                Standard_Functions_Decl.append(Current_section)
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            if Current_section:
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                Function_decl = dict([(champ, val) for champ, val in zip(fonctions, fields[1:]) if champ])
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                baseinputnumber = int(Function_decl.get("baseinputnumber", 1))
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                Function_decl["baseinputnumber"] = baseinputnumber
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                for param, value in Function_decl.iteritems():
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                    if param in translate:
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                        Function_decl[param] = translate[param](value)
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                Function_decl["type"] = "function"
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                if Function_decl["name"].startswith('*') or Function_decl["name"].endswith('*'):
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                    input_ovrloading_types = GetSubTypes(Function_decl["inputs"][0][1])
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                    output_types = GetSubTypes(Function_decl["outputs"][0][1])
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                else:
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                    input_ovrloading_types = [None]
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                    output_types = [None]
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   213
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                funcdeclname_orig = Function_decl["name"]
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                funcdeclname = Function_decl["name"].strip('*_')
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                fdc = Function_decl["inputs"][:]
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                for intype in input_ovrloading_types:
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                    if intype is not None:
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                        Function_decl["inputs"] = []
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                        for decl_tpl in fdc:
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                            if IsOfType(intype, decl_tpl[1]):
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                                Function_decl["inputs"] += [(decl_tpl[0], intype, decl_tpl[2])]
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                            else:
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                                Function_decl["inputs"] += [(decl_tpl)]
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                            if funcdeclname_orig.startswith('*'):
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                                funcdeclin = intype + '_' + funcdeclname
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                            else:
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                                funcdeclin = funcdeclname
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                    else:
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                        funcdeclin = funcdeclname
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   232
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                    for outype in output_types:
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                        if outype is not None:
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                            decl_tpl = Function_decl["outputs"][0]
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                            Function_decl["outputs"] = [(decl_tpl[0], outype,  decl_tpl[2])]
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                            if funcdeclname_orig.endswith('*'):
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                                funcdeclout = funcdeclin + '_' + outype
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                            else:
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                                funcdeclout = funcdeclin
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                        else:
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                            funcdeclout = funcdeclin
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                        Function_decl["name"] = funcdeclout
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                        # apply filter given in "filter" column
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                        filter_name = Function_decl["filter"]
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                        store = True
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                        for (InTypes, OutTypes) in ANY_TO_ANY_FILTERS.get(filter_name, []):
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                            outs = reduce(lambda a, b: a or b,
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                                          map(lambda testtype: IsOfType(
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                                              Function_decl["outputs"][0][1],
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                                              testtype), OutTypes))
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                            inps = reduce(lambda a, b: a or b,
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                                          map(lambda testtype: IsOfType(
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                                              Function_decl["inputs"][0][1],
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                                              testtype), InTypes))
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                            if inps and outs and Function_decl["outputs"][0][1] != Function_decl["inputs"][0][1]:
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                                store = True
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                                break
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                            else:
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                                store = False
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                        if store:
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                            # create the copy of decl dict to be appended to section
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                            Function_decl_copy = Function_decl.copy()
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                            Current_section["list"].append(Function_decl_copy)
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            else:
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                raise "First function must be in a category"
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    return Standard_Functions_Decl
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StdBlckLst.extend(get_standard_funtions(csv_file_to_table(open(StdFuncsCSV))))
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# Dictionary to speedup block type fetching by name
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StdBlckDct = OrderedDict()
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for section in StdBlckLst:
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    for desc in section["list"]:
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        words = desc["comment"].split('"')
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        if len(words) > 1:
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            desc["comment"] = words[1]
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        desc["usage"] = ("\n (%s) => (%s)" %
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                         (", ".join(["%s:%s" % (input[1], input[0])
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                                     for input in desc["inputs"]]),
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                          ", ".join(["%s:%s" % (output[1], output[0])
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                                     for output in desc["outputs"]])))
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        BlkLst = StdBlckDct.setdefault(desc["name"], [])
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        BlkLst.append((section["name"], desc))
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# -------------------------------------------------------------------------------
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#                            Languages Keywords
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# -------------------------------------------------------------------------------
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# Keywords for Pou Declaration
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POU_BLOCK_START_KEYWORDS = ["FUNCTION", "FUNCTION_BLOCK", "PROGRAM"]
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POU_BLOCK_END_KEYWORDS = ["END_FUNCTION", "END_FUNCTION_BLOCK", "END_PROGRAM"]
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POU_KEYWORDS = ["EN", "ENO", "F_EDGE", "R_EDGE"] + POU_BLOCK_START_KEYWORDS + POU_BLOCK_END_KEYWORDS
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for category in StdBlckLst:
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    for block in category["list"]:
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        if block["name"] not in POU_KEYWORDS:
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            POU_KEYWORDS.append(block["name"])
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# Keywords for Type Declaration
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TYPE_BLOCK_START_KEYWORDS = ["TYPE", "STRUCT"]
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TYPE_BLOCK_END_KEYWORDS = ["END_TYPE", "END_STRUCT"]
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TYPE_KEYWORDS = ["ARRAY", "OF", "T", "D", "TIME_OF_DAY", "DATE_AND_TIME"] + TYPE_BLOCK_START_KEYWORDS + TYPE_BLOCK_END_KEYWORDS
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TYPE_KEYWORDS.extend([keyword for keyword in TypeHierarchy.keys() if keyword not in TYPE_KEYWORDS])
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# Keywords for Variable Declaration
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VAR_BLOCK_START_KEYWORDS = ["VAR", "VAR_INPUT", "VAR_OUTPUT", "VAR_IN_OUT", "VAR_TEMP", "VAR_EXTERNAL"]
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VAR_BLOCK_END_KEYWORDS = ["END_VAR"]
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VAR_KEYWORDS = ["AT", "CONSTANT", "RETAIN", "NON_RETAIN"] + VAR_BLOCK_START_KEYWORDS + VAR_BLOCK_END_KEYWORDS
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# Keywords for Configuration Declaration
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CONFIG_BLOCK_START_KEYWORDS = ["CONFIGURATION", "RESOURCE", "VAR_ACCESS", "VAR_CONFIG", "VAR_GLOBAL"]
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CONFIG_BLOCK_END_KEYWORDS = ["END_CONFIGURATION", "END_RESOURCE", "END_VAR"]
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CONFIG_KEYWORDS = ["ON", "PROGRAM", "WITH", "READ_ONLY", "READ_WRITE", "TASK"] + CONFIG_BLOCK_START_KEYWORDS + CONFIG_BLOCK_END_KEYWORDS
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# Keywords for Structured Function Chart
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SFC_BLOCK_START_KEYWORDS = ["ACTION", "INITIAL_STEP", "STEP", "TRANSITION"]
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SFC_BLOCK_END_KEYWORDS = ["END_ACTION", "END_STEP", "END_TRANSITION"]
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SFC_KEYWORDS = ["FROM", "TO"] + SFC_BLOCK_START_KEYWORDS + SFC_BLOCK_END_KEYWORDS
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# Keywords for Instruction List
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IL_KEYWORDS = [
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    "TRUE", "FALSE", "LD", "LDN", "ST", "STN", "S", "R", "AND", "ANDN", "OR", "ORN",
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    "XOR", "XORN", "NOT", "ADD", "SUB", "MUL", "DIV", "MOD", "GT", "GE", "EQ", "NE",
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    "LE", "LT", "JMP", "JMPC", "JMPCN", "CAL", "CALC", "CALCN", "RET", "RETC", "RETCN"
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]
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# Keywords for Structured Text
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ST_BLOCK_START_KEYWORDS = ["IF", "ELSIF", "ELSE", "CASE", "FOR", "WHILE", "REPEAT"]
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ST_BLOCK_END_KEYWORDS = ["END_IF", "END_CASE", "END_FOR", "END_WHILE", "END_REPEAT"]
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ST_KEYWORDS = [
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    "TRUE", "FALSE", "THEN", "OF", "TO", "BY", "DO", "DO", "UNTIL", "EXIT",
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    "RETURN", "NOT", "MOD", "AND", "XOR", "OR"
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] + ST_BLOCK_START_KEYWORDS + ST_BLOCK_END_KEYWORDS
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# All the keywords of IEC
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IEC_BLOCK_START_KEYWORDS = []
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IEC_BLOCK_END_KEYWORDS = []
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IEC_KEYWORDS = ["E", "TRUE", "FALSE"]
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for all_keywords, keywords_list in [(IEC_BLOCK_START_KEYWORDS, [POU_BLOCK_START_KEYWORDS, TYPE_BLOCK_START_KEYWORDS,
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                                                                VAR_BLOCK_START_KEYWORDS, CONFIG_BLOCK_START_KEYWORDS,
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                                                                SFC_BLOCK_START_KEYWORDS, ST_BLOCK_START_KEYWORDS]),
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                                    (IEC_BLOCK_END_KEYWORDS, [POU_BLOCK_END_KEYWORDS, TYPE_BLOCK_END_KEYWORDS,
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                                                              VAR_BLOCK_END_KEYWORDS, CONFIG_BLOCK_END_KEYWORDS,
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                                                              SFC_BLOCK_END_KEYWORDS, ST_BLOCK_END_KEYWORDS]),
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                                    (IEC_KEYWORDS, [POU_KEYWORDS, TYPE_KEYWORDS, VAR_KEYWORDS, CONFIG_KEYWORDS,
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                                                    SFC_KEYWORDS, IL_KEYWORDS, ST_KEYWORDS])]:
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    for keywords in keywords_list:
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        all_keywords.extend([keyword for keyword in keywords if keyword not in all_keywords])