def bcc(self):
self.reset()
clock = 0
stack = ListStack()
for i in range(self.n):
if self.vertices[i].status == 'UNDISCOVERED':
self.BCC(i, clock, stack)
stack.pop()
def tsort(self):
self.reset()
stack = ListStack()
for i in range(self.n):
if self.vertices[i].status == 'UNDISCOVERED':
if not self.TSort(i, stack):
stack.clear()
break
return stack
def tsort(self):
self.reset()
stack = ListStack()
for i in range(self.n):
if self.vertices[i].status == 'UNDISCOVERED':
if not self.TSort(i, stack):
stack.clear()
break
return stack
def _processLoop(self, loopType, loopLines, context):
"""For loopType == "Fields" repeat lines in loopLines for all fields
for loopType == "SFields" repeat lines in loopLines for all sfields
for loopType == "MFields" repeat lines in loopLines for all mfields
"""
if loopType == "Fields" or loopType == "SFields" or loopType == "MFields":
fields = self._lookup(loopType, context);
else:
self.m_log.error("_processLoop: unknown loopType \"%s\"." % loopType);
return;
localDict = dict([("field", None)]);
loopContext = [localDict];
for c in context:
loopContext.append(c);
for field in fields:
localDict["field"] = field;
skipStack = ListStack();
skipCurrent = False;
for line in loopLines:
# handle @@if
matchIf = self.m_ifRE.search(line);
if matchIf != None:
skipStack.push(copy.copy(skipCurrent));
if skipStack.top() == False:
if self._lookup(matchIf.group(2), loopContext) == True:
skipCurrent = False;
else:
skipCurrent = True;
if matchIf.group(1) == "!":
skipCurrent = not skipCurrent;
continue;
# handle @@else
matchElse = self.m_elseRE.search(line);
if matchElse != None:
if skipStack.top() == False:
skipCurrent = not skipCurrent;
continue;
# handle @@endif
matchEndif = self.m_endifRE.search(line);
if matchEndif != None:
skipCurrent = skipStack.top();
skipStack.pop();
continue;
if skipCurrent == True:
continue;
# a line with regular text - substitute variables and add to output
self.m_outLines.append(self._substituteVariables(line, loopContext));
def parenMatch(expr):
# symboles de gauche
aGauche = "({["
# symboles de droite
aDroite = ")}]"
# utilise pile S
S = ListStack()
# pour chaque caractère dans l'expression
for c in expr:
# si on rencontre un caractère de gauche
if c in aGauche:
# on l'empile
S.push(c)
elif c in aDroite:
# si on a un symbole de droite
if S.is_empty():
# si la pile est vide, pas de match
return False
if aDroite.index(c) != aGauche.index(S.pop()):
# si le symbole à droite ne match pas le symbole à gauche
return False
# ici, si la pile est vide, l'expression est balancée
# sinon il reste un ou des symbole(s) non balancés dans la pile
return S.is_empty()
def test_insert(self):
rb = RingBuffer(4)
rs = RingStack(4)
rq = RingQueue(4)
ls = ListStack(4)
lq = ListQueue(4)
for name in TestRingBufferDS.names:
rb.insert_keep_old(name)
rs.insert(name)
rq.insert(name)
ls.insert(name)
lq.insert(name)
print("RingBuffer:", rb)
print("RingStack:", rs)
print("RingQueue:", rq)
print("ListStack:", ls)
print("ListQueue:", lq)
def initCounts(self, literalCount):
self.totalCount = heapdict.heapdict()
self.positiveCount = {}
self.countStack = ListStack()
totalChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if literal > 0:
self.positiveCount[variable] = literalCount[literal]
# - is used to make a max priority queue
for variable in totalChanges:
self.totalCount[variable] = -totalChanges[variable]
def initCounts(self, literalCount):
self.totalCount = {}
self.signCount = heapdict.heapdict()
self.countStack = ListStack()
totalChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if self.polarity == (literal > 0): # XNOR
# - is used to make a max priority queue
self.signCount[variable] = -literalCount[literal]
for variable in totalChanges:
self.totalCount[variable] = totalChanges[variable]
def test_remove(self):
rb = RingBuffer(4)
rs = RingStack(4)
rq = RingQueue(4)
ls = ListStack(4)
lq = ListQueue(4)
for name in TestRingBufferDS.names:
rb.insert_keep_old(name)
rs.insert(name)
rq.insert(name)
ls.insert(name)
lq.insert(name)
print("Before remove: ")
print("RingBuffer:", rb)
print("RingStack:", rs)
print("RingQueue:", rq)
print("ListStack:", ls)
print("ListQueue:", lq)
for i in range(2):
rs.remove()
rq.remove()
ls.remove()
lq.remove()
print("After remove: ")
print("RingBuffer:", rb)
print("RingStack:", rs)
print("RingQueue:", rq)
print("ListStack:", ls)
print("ListQueue:", lq)
def evalExp(expr):
# on utilise une pile pour les valeurs et une pile pour les opérations
valStk = ArrayStack()
opStk = ListStack()
# tant qu'il y a des jetons en entrée
for z in expr:
if z.isdigit(): # si chiffre, on l'empile
valStk.push(z)
if trace:
print("chiffre dans la pile", valStk)
elif z in "+-*/": # si opération, on voit si on peut l'effectuer
if trace:
print("opération lue : ", z)
repeatOps(z, valStk, opStk)
# on empile l'opération
opStk.push(z)
if trace:
print("opération dans la pile", opStk)
# on exécute l'opération sur la pile, le cas échéant
repeatOps('$', valStk, opStk)
# le resultat se trouve sur le top de la pile des valeurs
return valStk.top()
def test_init(self):
rb = RingBuffer(4)
rs = RingStack(4)
rq = RingQueue(4)
ls = ListStack(4)
lq = ListQueue(4)
self.assertIsNotNone(rb.head)
self.assertEqual(rb.size(), 0)
self.assertEqual(rs.top, -1)
self.assertEqual(rs.size, 0)
self.assertEqual(ls.top, -1)
self.assertEqual(ls.size, 0)
self.assertEqual(rq.front, -1)
self.assertEqual(rq.back, -1)
self.assertEqual(rq.size, 0)
self.assertEqual(lq.front, -1)
self.assertEqual(lq.back, -1)
self.assertEqual(lq.size, 0)
def parenMatch(expr):
aGauche = "({["
aDroite = ")}]"
S = ListStack()
for c in expr:
if c in aGauche:
#si à symbole ouvrant, on empile
S.push(c)
elif c in aDroite:
#si à symbole fermant...
if S.is_empty():
#si pile vide pas de match
return False
if aDroite.index(c) != aGauche.index(S.pop()):
#si symbole fermant ne match pas symbole ouvrant
return False
#match si pile vide, sinon symbole(s) non matché(s)
return S.is_empty()
def __init__(self, cnf, numOfVars, plugins, metrics):
self.plugins = plugins
self.metrics = metrics
self.assignmentStack = ListStack()
self.externalAssignmentStack = ListStack()
self.satisfiedClausesStack = ListStack()
self.model = {}
self.status = "UNDETERMINED"
self.clauses = cnf
self.remainingClausesHeap = heapdict.heapdict()
self.variableSignedClausesDict = {}
for clauseIdx in range(len(self.clauses)):
clause = self.clauses[clauseIdx]
clauseID = clauseIdx + 1
# Fill heap
self.remainingClausesHeap[clauseID] = len(clause)
# Fill variable => clauses dictionary
for literal in clause:
variable = abs(literal)
signedClauseID = clauseID if literal > 0 else -clauseID
if variable in self.variableSignedClausesDict:
self.variableSignedClausesDict[variable].append(
signedClauseID)
else:
self.variableSignedClausesDict[variable] = [signedClauseID]
self.remainingVariablesSet = set([])
for clause in cnf:
for literal in clause:
variable = abs(literal)
self.remainingVariablesSet.add(variable)
for plugin in self.plugins:
plugin.construct(self)
# TODO We need to make sure that every variable exists once in each clause
# if it exists twice with same polarity reduce one of them
# else status = UNSAT !!
self.unitPropagation()
def matchBrackets(bracket_array):
bracket_stack = ListStack()
open_per = ['{', '(', '[', '<']
close_per = ['}', ')', ']', '>']
for i in range(len(bracket_array)):
#if the current character is an open bracket add it to the stack
if (bracket_array[i] in open_per):
bracket_stack.push(bracket_array[i])
continue
# if we get past the first character and it's still empty we know it's impossible to have a matching bracket
if bracket_stack.isEmpty():
return False
top_bracket = bracket_stack.pop()
print(top_bracket)
bracket_found = False
if (top_bracket == open_per[0]) & (bracket_array[i] == close_per[0]):
bracket_found == True
if not bracket_found:
print('Bracket not found')
return False
# if not bracket_stack.isEmpty():
# return False
return True
def fill(self, dictList):
"""Fill in a template using the contents of the dictionaries in
dictList.
"""
self.m_outLines = [];
skipStack = ListStack();
skipCurrent = False;
inLoop = False;
loopLines = [];
# Go through template and find loops, collect their lines in loopLines.
# call _processLoop for the loopLines.
context = [d for d in dictList];
for lineNum, line in enumerate(self.m_inLines):
# handle @@BeginFieldLoop
matchBeginFieldLoop = self.m_BeginFieldLoopRE.search(line);
if (not skipCurrent) and (matchBeginFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginFieldLoop", lineNum);
inLoop = True;
continue;
# handle @@BeginSFFieldLoop
matchBeginSFFieldLoop = self.m_BeginSFFieldLoopRE.search(line);
if (not skipCurrent) and (matchBeginSFFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginSFFieldLoop", lineNum);
inLoop = True;
continue;
# handle @@BeginMFFieldLoop
matchBeginMFFieldLoop = self.m_BeginMFFieldLoopRE.search(line);
if (not skipCurrent) and (matchBeginMFFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginMFFieldLoop", lineNum);
inLoop = True;
continue;
# handle @@BeginProducedEventLoop
matchBeginProducedEventLoop = self.m_BeginProducedEventLoopRE.search(line);
if (not skipCurrent) and (matchBeginProducedEventLoop != None):
#self.m_log.debug("fill: line %d -> BeginProducedEventLoop", lineNum);
inLoop = True;
continue;
# handle loops - do not bother with conditionals they are handled in
# _processLoop
if (not skipCurrent) and (inLoop == True):
# handle @@EndFieldLoop
matchEndFieldLoop = self.m_EndFieldLoopRE.search(line);
if matchEndFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndFieldLoop", lineNum);
self._processLoop("Fields", loopLines, context);
inLoop = False;
loopLines = [];
continue;
# handle @@EndSFFieldLoop
matchEndSFFieldLoop = self.m_EndSFFieldLoopRE.search(line);
if matchEndSFFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndSFFieldLoop", lineNum);
self._processLoop("SFields", loopLines, context);
inLoop = False;
loopLines = [];
continue;
# handle @@EndMFFieldLoop
matchEndMFFieldLoop = self.m_EndMFFieldLoopRE.search(line);
if matchEndMFFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndMFFieldLoop", lineNum);
self._processLoop("MFields", loopLines, context);
inLoop = False;
loopLines = [];
continue;
# handle @@EndProducedEventLoop
matchEndProducedEventLoop = self.m_EndProducedEventLoopRE.search(line);
if matchEndProducedEventLoop != None:
#self.m_log.debug("fill: line %d -> EndProducedEventLoop", lineNum);
self._processLoop("ProducedEvents", loopLines, context);
inLoop = False;
loopLines = [];
continue;
loopLines.append(line);
continue;
# handle @@AdditionalIncludes
matchAdditionalIncludes = self.m_AdditionIncludesRE.search(line);
if matchAdditionalIncludes != None:
self._processAdditionalIncludes(dictList);
continue;
# handle @@AdditionalIncludes
matchAdditionalPrioIncludes = self.m_AdditionPrioIncludesRE.search(line);
if matchAdditionalPrioIncludes != None:
self._processAdditionalPrioIncludes(dictList);
continue;
# conditionals outside of loops must be treated here
# handle @@if
matchIf = self.m_ifRE.search(line);
if matchIf != None:
#self.m_log.debug("fill: line %d -> if", lineNum);
skipStack.push(copy.copy(skipCurrent));
if skipStack.top() == False:
if self._lookup(matchIf.group(2), dictList) == True:
skipCurrent = False;
else:
skipCurrent = True;
if matchIf.group(1) == "!":
skipCurrent = not skipCurrent;
continue;
# handle @@else
matchElse = self.m_elseRE.search(line);
if matchElse != None:
#self.m_log.debug("fill: line %d -> else", lineNum);
if skipStack.top() == False:
skipCurrent = not skipCurrent;
continue;
# handle @@endif
matchEndif = self.m_endifRE.search(line);
if matchEndif != None:
#self.m_log.debug("fill: line %d -> endif", lineNum);
skipCurrent = skipStack.top();
skipStack.pop();
continue;
if skipCurrent == True:
continue;
# a line with regular text - substitute variables and add to output
self.m_outLines.append(self._substituteVariables(line, context));
return self.m_outLines;
class DynamicLargestIndividualSum(BranchDecisionHeuristicInterface,
VariableCountPlugin):
def __init__(self, polarity):
self.polarity = polarity
def initCounts(self, literalCount):
self.totalCount = {}
self.signCount = heapdict.heapdict()
self.countStack = ListStack()
totalChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if self.polarity == (literal > 0): # XNOR
# - is used to make a max priority queue
self.signCount[variable] = -literalCount[literal]
for variable in totalChanges:
self.totalCount[variable] = totalChanges[variable]
def pushCurrentCountsAndDecrease(self, assignedVariable, literalCount):
if assignedVariable in literalCount or -assignedVariable in literalCount:
print("assignedVariable Exists")
previousTotalCount = 0
previousSignCount = 0
if assignedVariable in self.totalCount:
previousTotalCount = self.totalCount[assignedVariable]
self.totalCount.pop(assignedVariable, None)
if assignedVariable in self.signCount:
previousSignCount = self.signCount[assignedVariable]
self.signCount.pop(assignedVariable, None)
totalChanges = {}
positiveChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if self.polarity == (literal > 0): # XNOR
positiveChanges[variable] = literalCount[literal]
changedVariables = {}
for variable in totalChanges:
tc = 0
sc = 0
if variable in self.totalCount:
tc = self.totalCount[variable]
if variable in self.signCount:
sc = self.signCount[variable]
if sc > 0:
raise "sc can't be positive"
if tc < 0:
raise "sc can't be negative"
changedVariables[variable] = (tc, sc)
# Apply changes
# - is used to decrease the count
newValue = self.totalCount[variable] - totalChanges[variable]
if newValue < 0:
raise "newValue can't be negative"
if newValue == 0:
self.totalCount.pop(variable, None)
else:
self.totalCount[variable] = newValue
# Apply changes
for variable in positiveChanges:
# + is used to make a max priority queue
newValue = self.signCount[variable] + positiveChanges[variable]
if newValue > 0:
raise "newValue can't be positive"
if newValue == 0:
self.signCount.pop(variable, None)
else:
self.signCount[variable] = newValue
self.countStack.push((assignedVariable, previousTotalCount,
previousSignCount, changedVariables))
return
def popCurrentCounts(self):
assignedVariable, previousTotalCount, previousSignCount, changedVariables = self.countStack.pop(
)
if previousTotalCount != 0:
self.totalCount[assignedVariable] = previousTotalCount
if previousSignCount != 0:
self.signCount[assignedVariable] = previousSignCount
for variable in changedVariables:
tc, sc = changedVariables[variable]
if tc != 0:
self.totalCount[variable] = tc
if sc != 0:
self.signCount[variable] = sc
return
def chooseVariableAndValue(self, cnfState):
variable, signCount = self.signCount.peekitem()
signCount = -signCount
tc = self.totalCount[variable]
otherSignCount = tc - signCount
if tc <= 0 or signCount < 0 or otherSignCount < 0:
raise "this can't be true"
value = self.polarity if signCount > otherSignCount else not self.polarity
return variable, value
def fill(self, dictList):
"""Fill in a template using the contents of the dictionaries in
dictList.
"""
self.m_outLines = []
skipStack = ListStack()
skipCurrent = False
inLoop = False
loopLines = []
# Go through template and find loops, collect their lines in loopLines.
# call _processLoop for the loopLines.
context = [d for d in dictList]
for lineNum, line in enumerate(self.m_inLines):
# handle @@BeginFieldLoop
matchBeginFieldLoop = self.m_BeginFieldLoopRE.search(line)
if (not skipCurrent) and (matchBeginFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginFieldLoop", lineNum);
inLoop = True
continue
# handle @@BeginSFFieldLoop
matchBeginSFFieldLoop = self.m_BeginSFFieldLoopRE.search(line)
if (not skipCurrent) and (matchBeginSFFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginSFFieldLoop", lineNum);
inLoop = True
continue
# handle @@BeginMFFieldLoop
matchBeginMFFieldLoop = self.m_BeginMFFieldLoopRE.search(line)
if (not skipCurrent) and (matchBeginMFFieldLoop != None):
#self.m_log.debug("fill: line %d -> BeginMFFieldLoop", lineNum);
inLoop = True
continue
# handle loops - do not bother with conditionals they are handled in
# _processLoop
if (not skipCurrent) and (inLoop == True):
# handle @@EndFieldLoop
matchEndFieldLoop = self.m_EndFieldLoopRE.search(line)
if matchEndFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndFieldLoop", lineNum);
self._processLoop("Fields", loopLines, context)
inLoop = False
loopLines = []
continue
# handle @@EndSFFieldLoop
matchEndSFFieldLoop = self.m_EndSFFieldLoopRE.search(line)
if matchEndSFFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndSFFieldLoop", lineNum);
self._processLoop("SFields", loopLines, context)
inLoop = False
loopLines = []
continue
# handle @@EndMFFieldLoop
matchEndMFFieldLoop = self.m_EndMFFieldLoopRE.search(line)
if matchEndMFFieldLoop != None:
#self.m_log.debug("fill: line %d -> EndMFFieldLoop", lineNum);
self._processLoop("MFields", loopLines, context)
inLoop = False
loopLines = []
continue
loopLines.append(line)
continue
# handle @@AdditionalIncludes
matchAdditionalIncludes = self.m_AdditionIncludesRE.search(line)
if matchAdditionalIncludes != None:
self._processAdditionalIncludes(dictList)
continue
# handle @@AdditionalIncludes
matchAdditionalPrioIncludes = self.m_AdditionPrioIncludesRE.search(
line)
if matchAdditionalPrioIncludes != None:
self._processAdditionalPrioIncludes(dictList)
continue
# conditionals outside of loops must be treated here
# handle @@if
matchIf = self.m_ifRE.search(line)
if matchIf != None:
#self.m_log.debug("fill: line %d -> if", lineNum);
skipStack.push(copy.copy(skipCurrent))
if skipStack.top() == False:
if self._lookup(matchIf.group(2), dictList) == True:
skipCurrent = False
else:
skipCurrent = True
if matchIf.group(1) == "!":
skipCurrent = not skipCurrent
continue
# handle @@else
matchElse = self.m_elseRE.search(line)
if matchElse != None:
#self.m_log.debug("fill: line %d -> else", lineNum);
if skipStack.top() == False:
skipCurrent = not skipCurrent
continue
# handle @@endif
matchEndif = self.m_endifRE.search(line)
if matchEndif != None:
#self.m_log.debug("fill: line %d -> endif", lineNum);
skipCurrent = skipStack.top()
skipStack.pop()
continue
if skipCurrent == True:
continue
# a line with regular text - substitute variables and add to output
self.m_outLines.append(self._substituteVariables(line, context))
return self.m_outLines
class DynamicLargestCombinedSum(BranchDecisionHeuristicInterface,
VariableCountPlugin):
def initCounts(self, literalCount):
self.totalCount = heapdict.heapdict()
self.positiveCount = {}
self.countStack = ListStack()
totalChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if literal > 0:
self.positiveCount[variable] = literalCount[literal]
# - is used to make a max priority queue
for variable in totalChanges:
self.totalCount[variable] = -totalChanges[variable]
def pushCurrentCountsAndDecrease(self, assignedVariable, literalCount):
if assignedVariable in literalCount or -assignedVariable in literalCount:
print("assignedVariable Exists")
previousTotalCount = 0
previousPositiveCount = 0
if assignedVariable in self.totalCount:
previousTotalCount = self.totalCount[assignedVariable]
self.totalCount.pop(assignedVariable, None)
if assignedVariable in self.positiveCount:
previousPositiveCount = self.positiveCount[assignedVariable]
self.positiveCount.pop(assignedVariable, None)
totalChanges = {}
positiveChanges = {}
for literal in literalCount:
variable = abs(literal)
if variable in totalChanges:
totalChanges[variable] += literalCount[literal]
else:
totalChanges[variable] = literalCount[literal]
if literal > 0:
positiveChanges[variable] = literalCount[literal]
changedVariables = {}
for variable in totalChanges:
tc = 0
pc = 0
if variable in self.totalCount:
tc = self.totalCount[variable]
if variable in self.positiveCount:
pc = self.positiveCount[variable]
if pc < 0:
raise "pc can't be negative"
changedVariables[variable] = (tc, pc)
# Apply changes
# + is used to make a max priority queue
newValue = self.totalCount[variable] + totalChanges[variable]
if newValue > 0:
raise "tc can't be positive"
if newValue == 0:
self.totalCount.pop(variable, None)
else:
self.totalCount[variable] = newValue
# Apply changes
for variable in positiveChanges:
# - is used to decrease the count
newValue = self.positiveCount[variable] - positiveChanges[variable]
if newValue < 0:
raise "pc can't be negative"
if newValue == 0:
self.positiveCount.pop(variable, None)
else:
self.positiveCount[variable] = newValue
self.countStack.push((assignedVariable, previousTotalCount,
previousPositiveCount, changedVariables))
return
def popCurrentCounts(self):
assignedVariable, previousTotalCount, previousPositiveCount, changedVariables = self.countStack.pop(
)
if previousTotalCount != 0:
self.totalCount[assignedVariable] = previousTotalCount
if previousPositiveCount != 0:
self.positiveCount[assignedVariable] = previousPositiveCount
for variable in changedVariables:
tc, pc = changedVariables[variable]
if tc != 0:
self.totalCount[variable] = tc
if pc != 0:
self.positiveCount[variable] = pc
return
def chooseVariableAndValue(self, cnfState):
variable, tc = self.totalCount.peekitem()
tc = -tc
pc = self.positiveCount[variable]
nc = tc - pc
if tc <= 0 or pc < 0 or nc < 0:
raise "this can't be true"
value = pc > nc
return variable, value
class CNFState():
# - self.remainingClauses: an array of clauses has unassigned variables
# - self.satisfiedClausesStack: a stack of satisfied clauses at each step
# - self.assignmentStack: a running stack of variable assignment
def __init__(self, cnf, numOfVars, plugins, metrics):
self.plugins = plugins
self.metrics = metrics
self.assignmentStack = ListStack()
self.externalAssignmentStack = ListStack()
self.satisfiedClausesStack = ListStack()
self.model = {}
self.status = "UNDETERMINED"
self.clauses = cnf
self.remainingClausesHeap = heapdict.heapdict()
self.variableSignedClausesDict = {}
for clauseIdx in range(len(self.clauses)):
clause = self.clauses[clauseIdx]
clauseID = clauseIdx + 1
# Fill heap
self.remainingClausesHeap[clauseID] = len(clause)
# Fill variable => clauses dictionary
for literal in clause:
variable = abs(literal)
signedClauseID = clauseID if literal > 0 else -clauseID
if variable in self.variableSignedClausesDict:
self.variableSignedClausesDict[variable].append(
signedClauseID)
else:
self.variableSignedClausesDict[variable] = [signedClauseID]
self.remainingVariablesSet = set([])
for clause in cnf:
for literal in clause:
variable = abs(literal)
self.remainingVariablesSet.add(variable)
for plugin in self.plugins:
plugin.construct(self)
# TODO We need to make sure that every variable exists once in each clause
# if it exists twice with same polarity reduce one of them
# else status = UNSAT !!
self.unitPropagation()
def getRemainingVariablesSet(self):
return self.remainingVariablesSet
def assignmentLength(self):
return len(self.externalAssignmentStack)
def getModel(self):
return self.model
def getStatus(self):
return self.status
def lastAssignment(self):
variable, value, state = self.externalAssignmentStack.top()
return variable, value, state
def pushAssignment(self, variable, value):
self.externalAssignmentStack.push((variable, value, "BRANCH"))
self.pushAssignmentInternal(variable, value, "BRANCH")
self.unitPropagation()
return self.status, variable, value
def pushAssignmentInternal(self, variable, value, state):
self.assignmentStack.push((variable, value, state))
self.model[variable] = value
if variable in self.remainingVariablesSet:
self.remainingVariablesSet.remove(variable)
else:
print("Not in set")
for plugin in self.plugins:
plugin.assignmentPushed(self, variable, value)
# we need to deduce
self.deduceNewVariable(variable, value)
return self.status, variable, value
def flipLastAssignment(self):
self.metrics.incrementCounter("flip")
variable, value = self.popLastAssignment()
value = not value
self.externalAssignmentStack.push((variable, value, "FLIPPED"))
self.pushAssignmentInternal(variable, value, "FLIPPED")
self.unitPropagation()
return self.status, variable, value
def backtrackUntilUnflipped(self):
self.metrics.incrementCounter("backtrack")
while len(self.externalAssignmentStack) > 0:
_, _ = self.popLastAssignment()
if len(self.externalAssignmentStack) == 0:
break
_, _, state = self.externalAssignmentStack.top()
if state == "BRANCH": # unflipped
break
if len(self.externalAssignmentStack) == 0:
self.status = "UNSAT"
return self.status
# The new variable is already added
def deduceNewVariable(self, variable, value):
# Deduction Step
# /Find/ remaining clauses which contain currentVariable
# (preferably from the least to the highest in terms of unsatisfied literals)
# do either:
# - if literal value is True => /Remove/ that clause from remaining clauses
# - if literal value is False => /Reduce/ the number of unsatisfied literals
# Removed clausess are put in satisfiedClausesStack
variableSignedClauseIDs = self.variableSignedClausesDict[variable]
satisfiedClauseIDs = []
newPriorities = {}
for signedClauseID in variableSignedClauseIDs:
clauseID = abs(signedClauseID)
if clauseID in self.remainingClausesHeap:
if (value == True
and signedClauseID > 0) or (value == False
and signedClauseID < 0):
satisfiedClauseIDs.append(clauseID)
else:
newPriorities[
clauseID] = self.remainingClausesHeap[clauseID] - 1
if newPriorities[clauseID] == 0:
self.status = "CONFLICT"
return
satisfiedClausesPriorities = {}
for clauseID in satisfiedClauseIDs:
satisfiedClausesPriorities[clauseID] = self.remainingClausesHeap[
clauseID]
self.remainingClausesHeap.pop(clauseID)
self.satisfiedClausesStack.push(satisfiedClausesPriorities)
for plugin in self.plugins:
plugin.satisfiedClausesPushed(self, variable,
satisfiedClausesPriorities)
for clauseID in newPriorities:
self.remainingClausesHeap[clauseID] = newPriorities[clauseID]
if len(self.remainingClausesHeap) == 0:
self.status = "SAT"
return
self.status = "UNDETERMINED"
def popLastAssignment(self):
while len(self.assignmentStack) > 0:
variable, value, state = self.assignmentStack.pop()
self.model.pop(variable, None)
self.remainingVariablesSet.add(variable)
for plugin in self.plugins:
plugin.assignmentPoped(self, variable, value)
if self.status != "CONFLICT":
variableSignedClauseIDs = self.variableSignedClausesDict[
variable]
# For clauses inside remainingClausesHeap, their priority need to be increased
for signedClauseID in variableSignedClauseIDs:
clauseID = abs(signedClauseID)
if clauseID in self.remainingClausesHeap:
self.remainingClausesHeap[
clauseID] = self.remainingClausesHeap[clauseID] + 1
# Then add previously satisfied clauses from satisfiedClausesStack
# which will come with the correct previous priority
satisfiedClausesPriorities = self.satisfiedClausesStack.pop()
for clauseID in satisfiedClausesPriorities:
self.remainingClausesHeap[
clauseID] = satisfiedClausesPriorities[clauseID]
for plugin in self.plugins:
plugin.satisfiedClausesPoped(self, variable,
satisfiedClausesPriorities)
self.status = "UNDETERMINED"
if state != "UNIT":
self.externalAssignmentStack.pop()
break
self.status = "UNDETERMINED"
return variable, value
def unitPropagation(self):
# Unit Propagation
# /Find clause with the least number/ of unsatisfied literals
# if the number of unsatisfied literal is 1
# /Remove/ this clause, assign a proper value to the varialbe,
# Then go back to Deduce step
if self.status == "CONFLICT":
return
while len(self.remainingClausesHeap) > 0 and self.status != "CONFLICT":
clauseID, priority = self.remainingClausesHeap.peekitem()
if priority > 1:
break
self.metrics.incrementCounter("unit")
clauseIdx = clauseID - 1
# Which variable is unassigned?
for literal in self.clauses[clauseIdx]:
variable = abs(literal)
if variable in self.model:
pass
else:
# unassigned variable
# choose a value for it to satisfy the clause
value = True if literal > 0 else False
self.pushAssignmentInternal(variable, value, "UNIT")
break
return
def benchMarkTest():
"""
BenchMark IntStack vs Python deque.
"""
n = 10000000
intStack = IntStack(n)
# Implemenation using IntStack module (5.046 sec)
start = time.process_time()
for i in range(0, n):
intStack.push(i)
for i in range(0, n):
intStack.pop()
end = time.process_time()
print("IntStack Time: ", (end - start))
# Implemenation using ListStack module (29.609375 sec)
listStack = ListStack()
start = time.process_time()
for i in range(0, n):
listStack.push(i)
for i in range(0, n):
listStack.pop()
end = time.process_time()
print("ListStack Time: ", (end - start))
# Implemenation using ArrayStack module (7.09375 sec)
arrayStack = ArrayStack(0)
start = time.process_time()
for i in range(0, n):
arrayStack.push(i)
for i in range(0, n):
arrayStack.pop()
end = time.process_time()
print("ArrayStack Time: ", (end - start))
# Implementation using collections.deque (1.28125 sec)
# Python stack can be implemented using deque class from collections module.
# Deque is preferred over list in the cases where we need quicker append and
# pop operations from both the ends of the container, as deque provides an O(1)
# time complexity for append and pop operations as compared to list which
# provides O(n) time complexity.
# Same methods on deque as seen in list are used, append() and pop().
stackDeque = deque()
# deque is slower when you give it an initial capacity.
start = time.process_time()
for i in range(0, n):
stackDeque.append(i)
for i in range(0, n):
stackDeque.pop()
end = time.process_time()
print("DequeStack Time: ", (end - start))
# Implemenation using queue module (33.765625 sec)
# Queue module also has a LIFO Queue, which is basically a Stack. Data is
# inserted into Queue using put() function and get() takes data out from the Queue.
lifoStack = LifoQueue(maxsize=n)
start = time.process_time()
for i in range(0, n):
lifoStack.put(i)
for i in range(0, n):
lifoStack.get()
end = time.process_time()
print("LIFOStack Time: ", (end - start))
def __init__(self, reader):
self.m_log = logging.getLogger("FCDContentHandler");
self.m_reader = reader;
self.m_container = None;
self.m_elemStack = ListStack();
def setUp(self):
self.stacks = []
self.stacks.append(ListStack())
self.stacks.append(ArrayStack(0))
self.stacks.append(IntStack(2))
def main():
print('\n\nCreating empty ListStack named "a" of size 4')
a = ListStack(4)
print('Creating empty ListQueue named "b" of size 4')
b = ListQueue(4)
print('Creating empty Stack named "c" of size 4')
c = Stack(4)
print('Creating empty Queue named "d" of size 4')
d = Queue(4)
print("")
print("PEEKING ON AN (a)LISTSTACK, (b)QUEUESTACK, (c)STACK, (d)QUEUE")
print('peek on a', a.peek(), 'currently contains', a.__str__())
print('peek on b', b.peek(), 'currently contains', b.__str__())
print('peek on c', c.peek(), 'currently contains', c.__str__())
print('peek on d', d.peek(), 'currently contains', d.__str__())
print("")
print(
" ----------- INSERTING VALUES ON (a)LISTSTACK, (b)QUEUESTACK, (c)STACK, (d)QUEUE ---------------"
)
for val in range(6):
print('inserting', val,
'into both a(ListStack), b(ListQueue), c(Stack), d(Queue)\n')
print("")
a.insert(val)
b.insert(val)
c.push(val)
d.enqueue(val)
print('peek on a', a.peek(), 'currently contains', a.__str__())
print('peek on b', b.peek(), 'currently contains', b.__str__())
print('peek on c', c.peek(), 'currently contains', c.__str__())
print('peek on d', d.peek(), 'currently contains', d.__str__())
print("")
print(
" ----------- REMOVING VALUES ON (a)LISTSTACK, (b)QUEUESTACK, (c)STACK, (d)QUEUE ---------------"
)
for i in range(4):
print('Removing', i,
'into both a(ListStack), b(ListQueue), c(Stack), d(Queue)')
print('Before removing', a.peek(), 'from a', a.__str__())
a.remove()
print('peek on a', a.peek(), 'after removing', a.__str__())
print("")
print('Before removing', b.peek(), 'from b', b.__str__())
b.remove()
print('peek on a', a.peek(), 'after removing', b.__str__())
print("")
print('Before removing', c.peek(), 'from c', c.__str__())
c.pop()
print('peek on c', c.peek(), 'after removing', c.__str__())
print("")
print('Before removing', c.peek(), 'from d', d.__str__())
d.dequeue()
print('peek on d', c.peek(), 'after removing', d.__str__())
print("")
l = [10, 2, 23, 35, 76]
print(
" ----------- INSERTING USER DEFINED VALUES ON (a)LISTSTACK, (b)QUEUESTACK, (c)STACK, (d)QUEUE ---------------"
)
for val in l:
print('inserting', val,
'into both a and b and c which is user defined')
a.insert(val)
b.insert(val)
c.push(val)
d.enqueue(val)
print('peek on a', a.peek(), 'currently contains', a.__str__())
print('peek on b', a.peek(), 'currently contains', b.__str__())
print('peek on b', c.peek(), 'currently contains', c.__str__())
print('peek on d', d.peek(), 'currently contains', d.__str__())
print("")
print("")
print(
" ----------- REMOVING USER DEFINED VALUES ON (a)LISTSTACK, (b)QUEUESTACK, (c)STACK, (d)QUEUE ---------------"
)
for i in l:
print('Removing', i,
'into both a(ListStack), b(ListQueue), c(Stack), d(Queue)')
print('Before removing', a.peek(), 'from a', a.__str__())
a.remove()
print('peek on a', a.peek(), 'after removing', a.__str__())
print("")
print('Before removing', b.peek(), 'from b', b.__str__())
b.remove()
print('peek on a', a.peek(), 'after removing', b.__str__())
print("")
print('Before removing', c.peek(), 'from c', c.__str__())
c.pop()
print('peek on c', c.peek(), 'after removing', c.__str__())
print("")
print('Before removing', c.peek(), 'from d', d.__str__())
d.dequeue()
print('peek on d', c.peek(), 'after removing', d.__str__())
print("")
def __init__(self, reader):
self.m_log = logging.getLogger("FCDContentHandler")
self.m_reader = reader
self.m_container = None
self.m_elemStack = ListStack()
self.m_parseField = False
class FCDContentHandler(xml.sax.handler.ContentHandler):
"""A SAX-parser content handler class for .fcd files
"""
def __init__(self, reader):
self.m_log = logging.getLogger("FCDContentHandler");
self.m_reader = reader;
self.m_container = None;
self.m_elemStack = ListStack();
def startDocument(self):
self.m_log.debug("startDocument");
self.m_elemStack.clear();
def endDocument(self):
self.m_log.debug("endDocument");
self.m_container.finalize();
self.m_reader.setFieldContainer(self.m_container);
def startElement(self, name, attr):
self.m_log.debug("startElement: %s", name);
if name == "FieldContainer":
container = FieldContainer();
self.m_container = container;
self.m_elemStack.push(container);
elif name == "Field":
field = Field();
self.m_elemStack.top().addField(field);
self.m_elemStack.push(field);
elif name == "ProducedEvent":
producedEvent = ProducedEvent();
self.m_elemStack.top().addProducedEvent(producedEvent);
self.m_elemStack.push(producedEvent);
else:
self.m_log.error("startElement: unknown element: %s", name);
return;
for i, attrName in enumerate(attr.getNames()):
self.m_log.debug("%s attr: %d - %s - %s", name, i, attrName, attr[attrName]);
self.m_elemStack.top().setFCD(attrName, attr[attrName]);
def endElement(self, name):
self.m_log.debug("endElement: %s", name);
self.m_elemStack.pop();
def characters(self, content):
self.m_log.debug("characters: |%s|", content);
currDesc = self.m_elemStack.top().getFCD("description");
if currDesc == None:
self.m_elemStack.top().setFCD("description", content.lstrip(" \t"));
else:
currDesc += content.lstrip(" \t");
self.m_elemStack.top().setFCD("description", currDesc);
class FCDContentHandler(xml.sax.handler.ContentHandler):
"""A SAX-parser content handler class for .fcd files
"""
def __init__(self, reader):
self.m_log = logging.getLogger("FCDContentHandler")
self.m_reader = reader
self.m_container = None
self.m_elemStack = ListStack()
self.m_parseField = False
def startDocument(self):
self.m_log.debug("startDocument")
self.m_elemStack.clear()
def endDocument(self):
self.m_log.debug("endDocument")
self.m_container.finalize()
self.m_reader.setFieldContainer(self.m_container)
def startElement(self, name, attr):
self.m_log.debug("startElement: %s", name)
if name == "FieldContainer":
container = FieldContainer()
self.m_container = container
self.m_elemStack.push(container)
elif name == "Field":
field = Field()
self.m_elemStack.top().addField(field)
self.m_elemStack.push(field)
self.m_parseField = True
else:
self.m_log.error("startElement: unknown element: %s", name)
return
for i, attrName in enumerate(attr.getNames()):
self.m_log.debug("%s attr: %d - %s - %s", name, i, attrName,
attr[attrName])
self.m_elemStack.top().setFCD(attrName, attr[attrName])
def endElement(self, name):
self.m_log.debug("endElement: %s", name)
if (self.m_parseField == True):
if (self.m_elemStack.top().getFCD("osg2Ignore") == "true"):
field = self.m_elemStack.top()
self.m_elemStack.pop()
self.m_elemStack.top().subField(field)
else:
self.m_elemStack.pop()
self.m_parseField = False
else:
self.m_elemStack.pop()
def characters(self, content):
self.m_log.debug("characters: |%s|", content)
currDesc = self.m_elemStack.top().getFCD("description")
if currDesc == None:
self.m_elemStack.top().setFCD("description", content.lstrip(" \t"))
else:
currDesc += content.lstrip(" \t")
self.m_elemStack.top().setFCD("description", currDesc)
print("Peek on Queue returns")
print(list1.peek())
print("Reseting the Queue with size 0")
list1 = Queue(0)
print("Now trying to add 1")
list1.enqueue(1)
print("Now trying to print Queue")
list1.__str__()
print("Now trying to dequeqe")
list1.dequeue()
print("-------------------")
print("Test case of ListStack")
sizeOfLS = int(input("Enter size of ListStack"))
a = ListStack(sizeOfLS)
print("Adding 1")
a.insert(1)
print('peek ', a.peek(), 'currently contains', a)
print("Adding 2")
a.insert(2)
print("Adding 3")
a.insert(3)
print("ListStack as of now ", a)
print("Adding 4.")
a.insert(4)
print("ListStack as of now ", a)
print("capacity of ListStack is", a.capacity())
print("Removing ", a.peek())
a.remove()
print(a)
def test():
"""
:return:
"""
print('\n\n\nCreating empty Stack named "a" of size 3')
a = Stack(4)
for val in range(7):
print('Inserting ', val, 'into a')
a.push(val)
print(" " + a.__str__())
print("--------------------")
for i in range(2):
print('Removing from a')
a.pop()
print(" " + a.__str__())
print('\n\n\n+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('\n\n\nCreating empty ListStack named "a" of size 3')
a = ListStack(4)
for val in range(7):
print('Inserting ', val, ' into a')
a.insert(val)
print(" " + a.__str__())
print("--------------------")
for i in range(2):
print('Removing from a')
a.remove()
print(" " + a.__str__())
print('\n\n\n+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('\n\n\nCreating empty ListQueue named "a" of size 3')
a = ListQueue(4)
for val in range(7):
print('Inserting ', val, ' into a')
a.insert(val)
print(" " + a.__str__())
print("--------------------")
for i in range(2):
print('Removing from a')
a.remove()
print(" " + a.__str__())
print('\n\n\n+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('+++++++++++++++++++++++++++++++++')
print('\n\n\nCreating empty Ring Buffer Queue named "a" of size 3')
a = Queue(4)
for val in range(7):
print('inserting', val, 'into a')
a.enqueue(val)
print(" " + a.__str__())
print("--------------------")
for i in range(2):
print('removing from a')
a.dequeue()
print(" " + a.__str__())
class JeroslowWangOneSided(BranchDecisionHeuristicInterface,
JeroslowWangPlugin):
def initCounts(self, literalScore):
self.literalScore = heapdict.heapdict()
self.countStack = ListStack()
for literal in literalScore:
# - is used to make a max priority queue
self.literalScore[literal] = -literalScore[literal]
return
def pushCurrentCountsAndDecrease(self, assignedVariable, literalScore):
if assignedVariable in literalScore or -assignedVariable in literalScore:
raise "assignedVariable Exists"
positiveScore = 0
if assignedVariable in self.literalScore:
positiveScore = self.literalScore[assignedVariable]
self.literalScore.pop(assignedVariable, None)
negativeScore = 0
if -assignedVariable in self.literalScore:
negativeScore = self.literalScore[-assignedVariable]
self.literalScore.pop(-assignedVariable, None)
changedLiterals = {}
for literal in literalScore:
score = self.literalScore[literal]
changedLiterals[literal] = score
# + is used to decrease the count
newValue = self.literalScore[literal] + literalScore[literal]
if newValue > 0:
raise "newValue can't be positive"
if abs(newValue) < 0.000001 and newValue != 0:
raise "very small"
if newValue == 0:
self.literalScore.pop(literal, None)
else:
self.literalScore[literal] = newValue
self.countStack.push(
(assignedVariable, positiveScore, negativeScore, changedLiterals))
return
def popCurrentCounts(self):
assignedVariable, positiveScore, negativeScore, changedLiterals = self.countStack.pop(
)
if positiveScore != 0:
self.literalScore[assignedVariable] = positiveScore
if negativeScore != 0:
self.literalScore[-assignedVariable] = negativeScore
for literal in changedLiterals:
score = changedLiterals[literal]
if score != 0:
self.literalScore[literal] = score
return
def chooseVariableAndValue(self, cnfState):
literal, score = self.literalScore.peekitem()
score = -score
if score <= 0:
raise "this can't be true"
variable = abs(literal)
value = literal > 0
return variable, value
def test_ListStack():
s = ListStack()
print(s.empty())
s.top()
s.pop()
s.push(1)
s.push(2)
s.push(3)
print(s.top())
s.pop()
print(s.top())
