Added work from my other class repositories before deletion

OSU Coursework/CS 361 - Software Engineering I/Assignment 3/eventspec.py

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+
+class EventSpec():
+
+    def readfsm(self,file):
+    # takes a filename, returns a finite state machine
+    # fsm is (begin state, structure)
+        fsm = {}
+        with open(file) as f:
+            s = None
+            t = {}
+            for l in f:
+                ls = l.split()
+                if (ls == []) or (ls[0][0] == "#"):
+                    continue
+                if ls[0] == "state:":
+                    if s != None:
+                        if s in fsm:
+                            raise SyntaxError("Cannot define state " + s + " twice")
+                        fsm[s] = t
+                    s = ls[1]
+                    t = {}
+                elif ls[1] == "->":
+                    t[ls[0]] = ls[2]
+                elif ls[0] == "begin:":
+                    beginState = ls[1]
+                else:
+                    raise SyntaxError(l + " is not a line in a finite state machine definition")
+            if s != None:
+                fsm[s] = t
+            return (beginState, fsm)
+
+    
+    def __init__(self,file):
+        (self.start, self.machine) = self.readfsm(file)
+        self.state = self.start
+        self.trace = []
+        self.triggers = {}
+
+    def onEvent(self, event, action):
+        self.triggers[event] = action
+        
+    def reset(self):
+        self.state = self.start
+        self.trace = []
+
+    def trace(self):
+        return self.trace
+
+    def state(self):
+        return self.state
+
+    def printLog(self):
+        i = 0
+        for (e,s) in self.trace:
+            print "  STEP #"+str(i)+":",e,"-->",s
+            i += 1
+        
+    def event(self, event):
+        try:
+            self.state = self.machine[self.state][event]
+            self.trace.append((event,self.state))
+            if event in self.triggers:
+                self.triggers[event]()
+        except KeyError:
+            raise RuntimeError("From state " + self.state + ", transition " + event + " is not allowed (trace: " + str(self.trace) + ")")
+