/// <summary>
/// move outwards from starting point on until operation to continue at is found
/// appending restore isomorphy at insertion point for isomorphy written on the way
/// returns operation to continue at
/// </summary>
private static SearchProgramOperation MoveOutwardsAppendingRemoveIsomorphy(
SearchProgramOperation startingPoint,
ref SearchProgramOperation insertionPoint,
string[] neededElementsForCheckOperation,
SearchProgramOperation outermostOperation,
SearchProgram topLevelSearchProgram)
{
// currently focused operation on our way outwards
SearchProgramOperation op = startingPoint;
// move outwards until operation to continue at is found
bool creationPointOfDominatingElementFound = false;
bool iterationReached = false;
do
{
op = op.Previous;
// insert code to clean up isomorphy information written by candidate acceptance
// in between the operation to continue and the check operation
if (op is AcceptCandidate)
{
AcceptCandidate writeIsomorphy =
op as AcceptCandidate;
AbandonCandidate restoreIsomorphy =
new AbandonCandidate(
writeIsomorphy.PatternElementName,
writeIsomorphy.NegativeIndependentNamePrefix,
writeIsomorphy.IsNode,
writeIsomorphy.NeverAboveMaxIsoSpace,
writeIsomorphy.Parallel,
writeIsomorphy.LockForAllThreads);
insertionPoint = insertionPoint.Append(restoreIsomorphy);
}
// insert code to clean up isomorphy information written by global candidate acceptance
// in between the operation to continue and the check operation
if (op is AcceptCandidateGlobal)
{
AcceptCandidateGlobal writeIsomorphy =
op as AcceptCandidateGlobal;
AbandonCandidateGlobal removeIsomorphy =
new AbandonCandidateGlobal(
writeIsomorphy.PatternElementName,
writeIsomorphy.NegativeIndependentNamePrefix,
writeIsomorphy.IsNode,
writeIsomorphy.NeverAboveMaxIsoSpace,
writeIsomorphy.Parallel);
insertionPoint = insertionPoint.Append(removeIsomorphy);
}
// insert code to clean up isomorphy information written by patternpath candidate acceptance
// in between the operation to continue and the check operation
if (op is AcceptCandidatePatternpath)
{
AcceptCandidatePatternpath writeIsomorphy =
op as AcceptCandidatePatternpath;
AbandonCandidatePatternpath removeIsomorphy =
new AbandonCandidatePatternpath(
writeIsomorphy.PatternElementName,
writeIsomorphy.NegativeIndependentNamePrefix,
writeIsomorphy.IsNode);
insertionPoint = insertionPoint.Append(removeIsomorphy);
}
// insert code to remove iterated pattern acceptance
if (op is AcceptIterated)
{
AcceptIterated acceptIterated =
op as AcceptIterated;
AbandonIterated abandonIterated =
new AbandonIterated();
insertionPoint = insertionPoint.Append(abandonIterated);
}
// insert code to undo subpattern matching initialization if we leave the subpattern matching method
if (op is InitializeSubpatternMatching)
{
InitializeSubpatternMatching initialize =
op as InitializeSubpatternMatching;
FinalizeSubpatternMatching finalize =
new FinalizeSubpatternMatching(initialize.Type);
insertionPoint = insertionPoint.Append(finalize);
}
// insert code to undo negative/independent matching initialization if we leave the negative/independent matching method
if (op is InitializeNegativeIndependentMatching)
{
InitializeNegativeIndependentMatching initialize =
op as InitializeNegativeIndependentMatching;
FinalizeNegativeIndependentMatching finalize =
new FinalizeNegativeIndependentMatching(initialize.NeverAboveMaxIsoSpace, initialize.Parallel);
insertionPoint = insertionPoint.Append(finalize);
}
// determine operation to continue at
// found by looking at the graph elements
// the check operation depends on / is dominated by
// its the first element iteration on our way outwards the search program
// after or at the point of a get element operation
// of some dominating element the check depends on
// (or the outermost operation if no iteration is found until it is reached)
if (op is GetCandidate || op is BothDirectionsIteration)
{
if (creationPointOfDominatingElementFound == false)
{
if (neededElementsForCheckOperation != null)
{
foreach (string dominating in neededElementsForCheckOperation)
{
GetCandidate getCandidate = op as GetCandidate;
BothDirectionsIteration bothDirections = op as BothDirectionsIteration;
if (getCandidate != null && getCandidate.PatternElementName == dominating ||
bothDirections != null && bothDirections.PatternElementName == dominating)
{
creationPointOfDominatingElementFound = true;
iterationReached = false;
break;
}
}
}
else
{
// needed elements == null means everything fits,
// take first element iteration on our way outwards the search program
// (or the outermost operation if no iteration is found until it is reached)
creationPointOfDominatingElementFound = true;
iterationReached = false;
}
}
if (op is GetCandidateByIteration || op is GetCandidateByIterationParallel || op is BothDirectionsIteration)
{
iterationReached = true;
}
}
}while(!(creationPointOfDominatingElementFound && iterationReached) &&
op != outermostOperation);
return(op);
}
/// <summary>
/// Search program operations completing the matching process
/// after all pattern elements have been found are created and inserted into the program
/// </summary>
private SearchProgramOperation buildMatchComplete(
SearchProgramOperation insertionPoint)
{
PatternGraph patternGraph = patternGraphWithNestingPatterns.Peek();
string negativeIndependentNamePrefix = NegativeIndependentNamePrefix(patternGraph);
// is subpattern gives information about type of top level enclosing pattern (action vs. subpattern)
// contains subpatterns gives informations about current pattern graph (might be negative, independent itself, too)
bool isSubpattern = programType == SearchProgramType.Subpattern
|| programType == SearchProgramType.AlternativeCase
|| programType == SearchProgramType.Iterated;
bool existsNonInlinedSubpattern = false;
foreach(PatternGraphEmbedding sub in patternGraph.embeddedGraphsPlusInlined)
if(!sub.inlined)
existsNonInlinedSubpattern = true;
bool containsSubpatterns = existsNonInlinedSubpattern
|| patternGraph.alternativesPlusInlined.Length >= 1
|| patternGraph.iteratedsPlusInlined.Length >= 1;
// increase iterated matched counter if it is iterated
if(programType==SearchProgramType.Iterated) {
AcceptIterated acceptIterated = new AcceptIterated();
insertionPoint = insertionPoint.Append(acceptIterated);
}
// push subpattern tasks (in case there are some)
if(containsSubpatterns)
insertionPoint = insertPushSubpatternTasks(insertionPoint);
// if this is a subpattern without subpatterns
// it may be the last to be matched - handle that case
if(!containsSubpatterns && isSubpattern && programType!=SearchProgramType.Iterated && negativeIndependentNamePrefix=="")
insertionPoint = insertCheckForTasksLeft(insertionPoint);
// if this is a subpattern or a top-level pattern which contains subpatterns
if(containsSubpatterns || isSubpattern && negativeIndependentNamePrefix=="")
{
// we do the global accept of all candidate elements (write isomorphy information)
insertionPoint = insertGlobalAccept(insertionPoint);
// and execute the open subpattern matching tasks
MatchSubpatterns matchSubpatterns = new MatchSubpatterns(negativeIndependentNamePrefix, parallelized);
insertionPoint = insertionPoint.Append(matchSubpatterns);
}
// pop subpattern tasks (in case there are/were some)
if(containsSubpatterns)
insertionPoint = insertPopSubpatternTasks(insertionPoint);
// handle matched or not matched subpatterns, matched local pattern
if(negativeIndependentNamePrefix == "")
{
// subpattern or top-level pattern which contains subpatterns
if(containsSubpatterns || isSubpattern)
insertionPoint = insertCheckForSubpatternsFound(insertionPoint, false);
else // top-level-pattern of action without subpatterns
insertionPoint = insertPatternFound(insertionPoint);
}
else
{
// negative/independent contains subpatterns
if(containsSubpatterns)
insertionPoint = insertCheckForSubpatternsFoundNegativeIndependent(insertionPoint);
else
insertionPoint = insertPatternFoundNegativeIndependent(insertionPoint);
}
// global abandon of all accepted candidate elements (remove isomorphy information)
if(containsSubpatterns || isSubpattern && negativeIndependentNamePrefix=="")
insertionPoint = insertGlobalAbandon(insertionPoint);
// decrease iterated matched counter again if it is iterated
if(programType == SearchProgramType.Iterated)
{
AbandonIterated abandonIterated = new AbandonIterated();
insertionPoint = insertionPoint.Append(abandonIterated);
}
return insertionPoint;
}