First commit

runtime-linux/antlr4-runtime/atn/ATNSimulator.cpp

@@ -0,0 +1,63 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "atn/ATNType.h"
+#include "atn/ATNConfigSet.h"
+#include "dfa/DFAState.h"
+#include "atn/ATNDeserializer.h"
+#include "atn/EmptyPredictionContext.h"
+
+#include "atn/ATNSimulator.h"
+
+using namespace antlr4;
+using namespace antlr4::dfa;
+using namespace antlr4::atn;
+
+const Ref<DFAState> ATNSimulator::ERROR = std::make_shared<DFAState>(INT32_MAX);
+antlrcpp::SingleWriteMultipleReadLock ATNSimulator::_stateLock;
+antlrcpp::SingleWriteMultipleReadLock ATNSimulator::_edgeLock;
+
+ATNSimulator::ATNSimulator(const ATN &atn, PredictionContextCache &sharedContextCache)
+: atn(atn), _sharedContextCache(sharedContextCache) {
+}
+
+ATNSimulator::~ATNSimulator() {
+}
+
+void ATNSimulator::clearDFA() {
+  throw UnsupportedOperationException("This ATN simulator does not support clearing the DFA.");
+}
+
+PredictionContextCache& ATNSimulator::getSharedContextCache() {
+  return _sharedContextCache;
+}
+
+Ref<PredictionContext> ATNSimulator::getCachedContext(Ref<PredictionContext> const& context) {
+  // This function must only be called with an active state lock, as we are going to change a shared structure.
+  std::map<Ref<PredictionContext>, Ref<PredictionContext>> visited;
+  return PredictionContext::getCachedContext(context, _sharedContextCache, visited);
+}
+
+ATN ATNSimulator::deserialize(const std::vector<uint16_t> &data) {
+  ATNDeserializer deserializer;
+  return deserializer.deserialize(data);
+}
+
+void ATNSimulator::checkCondition(bool condition) {
+  ATNDeserializer::checkCondition(condition);
+}
+
+void ATNSimulator::checkCondition(bool condition, const std::string &message) {
+  ATNDeserializer::checkCondition(condition, message);
+}
+
+Transition *ATNSimulator::edgeFactory(const ATN &atn, int type, int src, int trg, int arg1, int arg2, int arg3,
+                                      const std::vector<misc::IntervalSet> &sets) {
+  return ATNDeserializer::edgeFactory(atn, type, src, trg, arg1, arg2, arg3, sets);
+}
+
+ATNState *ATNSimulator::stateFactory(int type, int ruleIndex) {
+  return ATNDeserializer::stateFactory(type, ruleIndex);
+}