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# -*- coding: utf-8 -*-
#
# AWL simulator - Library
#
# Copyright 2014-2017 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.cython_support cimport * #@cy
from awlsim.common.compat import *
from awlsim.common.exceptions import *
from awlsim.common.dynamic_import import *
__all__ = [
"AwlLib",
]
class AwlLib(object):
"""AWL library."""
__awlLibs = {}
@classmethod
def register(cls, libName, description):
"""Register an AWL library."""
libName = libName.lower()
if libName in cls.__awlLibs:
raise AwlSimError("Trying to register library '%s', "
"but it does already exist.")
cls.__awlLibs[libName] = cls(libName, description)
@classmethod
def registerEntry(cls, entryClass):
"""Register an entry-class for an already registered library."""
libName = entryClass.libraryName.lower()
if libName not in cls.__awlLibs:
raise AwlSimError("Trying to register element '%s' "
"for unknown library '%s'." %\
(str(entryClass), entryClass.libraryName))
cls.__awlLibs[libName].entryClasses.add(entryClass)
@classmethod
def getByName(cls, libName):
"""Get a library, by name."""
libName = libName.lower()
# Name sanity check
try:
if not libName.strip():
raise ValueError
for c in libName:
if not isalnum(c) and c != "_":
raise ValueError
except ValueError:
raise AwlSimError("Library name '%s' "
"is invalid." % libName)
# Get the module and return the class
try:
importModule("awlsim.library.%s" % libName)
return cls.__awlLibs[libName]
except (ImportError, KeyError) as e:
raise AwlSimError("Library '%s' was not found "
"in the standard library catalog." %\
libName)
@classmethod
def getEntryBySelection(cls, selection):
"""Get a library entry class by AwlLibEntrySelection().
selection -> An AwlLibEntrySelection instance."""
return cls.getByName(selection.getLibName()).getEntry(selection)
def __init__(self, name, description):
self.name = name
self.description = description
self.entryClasses = set()
def entries(self):
"""Returns a sorted iterator over
all entry classes."""
def sortKey(cls):
return cls.staticIndex +\
0x10000 if cls._isFB else 0
for cls in sorted(self.entryClasses, key=sortKey):
yield cls
def getEntry(self, selection):
"""Get a library entry class by AwlLibEntrySelection().
selection -> An AwlLibEntrySelection instance."""
for cls in self.entryClasses:
if selection.getEntryType() == selection.TYPE_FC:
if not cls._isFC:
continue
else:
if not cls._isFB:
continue
if cls.staticIndex != selection.getEntryIndex():
continue
return cls
raise AwlSimError("The selected library entry '%s' was "
"not found." % str(selection))
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