2005-12-04 14:46:37 +00:00
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#!/usr/bin/python
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#
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# Spdl generator
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#
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import If
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2005-12-04 16:41:43 +00:00
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from misc import *
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2005-12-04 14:46:37 +00:00
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2005-12-05 11:16:06 +00:00
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def action(actiontype, fact):
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2005-12-04 18:42:24 +00:00
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res = actiontype + "_"
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res += str(fact.step)
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res += fact.spdl()
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return res
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2005-12-04 14:46:37 +00:00
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2005-12-05 11:16:06 +00:00
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def getRoles(protocol):
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roles = []
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2005-12-04 18:42:24 +00:00
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for rule in protocol:
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2005-12-05 11:16:06 +00:00
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roles += rule.getActors()
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return uniq(roles)
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2005-12-04 18:42:24 +00:00
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2005-12-05 11:16:06 +00:00
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class Role(object):
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""" Containts a list of rules, to be executed sequentially """
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def __init__(self,name,actor):
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self.name = name
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self.rules = []
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self.actor = actor
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def prependRule(self,rule):
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self.rules = [rule] + self.rules
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2005-12-04 18:42:24 +00:00
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2005-12-05 11:16:06 +00:00
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def getLength(self):
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return len(self.rules)
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2005-12-04 18:42:24 +00:00
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2005-12-05 11:16:06 +00:00
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def getFirst(self):
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if self.getLength() > 0:
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return self.rules[0]
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else:
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return None
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2005-12-04 18:42:24 +00:00
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2005-12-05 11:16:06 +00:00
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def getFirstStep(self):
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return self.getFirst().getStepFrom()
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2005-12-04 14:46:37 +00:00
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2005-12-05 11:16:06 +00:00
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def getActor(self):
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return self.actor
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2005-12-04 14:46:37 +00:00
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2005-12-05 11:16:06 +00:00
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def __str__(self):
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res = "Role " + self.name + "\n\n"
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for rule in self.rules:
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res += str(rule)
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res += "\n\n"
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return res
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2005-12-04 14:46:37 +00:00
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2005-12-05 11:16:06 +00:00
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def spdl(self):
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res = ""
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if len(self.rules) == 0:
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return res
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res += "role " + self.name + " ("
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# TODO Insert parameter agents
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res += ")\n"
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res += "{\n"
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# TODO declare constants, variables
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res += "\n"
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# Message sequence
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res += "\t// Knowledge before: " + str(self.rules[0].before.knowledge) + "\n"
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for rule in self.rules:
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# Read
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if rule.readFact != None:
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res += "\t" + action("read",rule.readFact) + ";\n"
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# Show knowledge extending for this read
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res += "\t// Knowledge delta: " + str(rule.before.runknowledge) + " -> " + str(rule.after.runknowledge) + "\n"
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# Send
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if rule.sendFact != None:
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res += "\t" + action("send",rule.sendFact) + ";\n"
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# TODO claims
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# Close up
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res += "}\n\n"
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return res
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def __cmp__(self,other):
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return cmp(self.name, other.name)
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def extractRoles(protocol):
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""" Extract the roles of a protocol description. This yields a
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list of Role objects """
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# Construct full list of rules to do
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rulestodo = []
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2005-12-04 18:42:24 +00:00
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for rule in protocol:
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2005-12-05 11:16:06 +00:00
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if type(rule) == If.MessageRule:
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rulestodo.append(rule)
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# Now process them until none are left
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# First, we have no rolenames yet
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rolenames = []
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roles = []
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while len(rulestodo) > 0:
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# Pick one hrule (with the highest step number, maybe)
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highest = rulestodo[0].getStepFrom()
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hrule = rulestodo[0]
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for rule in rulestodo:
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step = rule.getStepFrom()
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step = max(step,rule.getStepTo())
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if step >= highest:
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highest = step
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hrule = rule
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# hrule has been picked. Work back from here
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# first make up a name
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if len(hrule.getActors()) != 1:
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print "Warning: weird actor list for hrule:", hrule.getActors()
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name = "X"
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actor = None
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else:
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actor = hrule.getActors()[0]
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name = str(actor)
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# Remove variable x prefix
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if len(name) > 1 and name[0] == 'x':
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name = name[1:]
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# This name is maybe already taken
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if name in rolenames:
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# Append counter
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counter = 2
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while name + str(counter) in rolenames:
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counter = counter+1
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name = name + str(counter)
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rolenames.append(name)
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role = Role(name,actor)
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roles.append(role)
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# Transfer to rule
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role.prependRule(hrule)
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rulestodo.remove(hrule)
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# Scan for preceding events until none is found
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scan = True
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while scan and role.getFirstStep() != -1:
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scan = False
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for rule in rulestodo:
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if actor in rule.getActors() and rule.getStepTo() == role.getFirstStep():
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# This one works
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role.prependRule(rule)
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rulestodo.remove(rule)
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scan = True
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return roles
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2005-12-04 14:46:37 +00:00
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2005-12-04 18:42:24 +00:00
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def generator(protocol):
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2005-12-05 11:16:06 +00:00
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roles = extractRoles(protocol)
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roles.sort()
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2005-12-04 14:46:37 +00:00
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res = ""
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2005-12-05 11:16:06 +00:00
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print "Found",len(roles),"roles."
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2005-12-04 14:46:37 +00:00
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for role in roles:
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2005-12-05 11:16:06 +00:00
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res += role.spdl()
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2005-12-04 14:46:37 +00:00
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return res
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