1 files changed, 50 insertions, 0 deletions
diff --git a/src/script/difference.cc b/src/script/difference.cc
new file mode 100644
index 0000000..1fcfa3e
--- /dev/null
+++ b/src/script/difference.cc
@@ -0,0 +1,50 @@
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Copyright 2005-2010 Google, Inc.
+// Author: jpr@google.com (Jake Ratkiewicz)
+
+#include <fst/script/fst-class.h>
+#include <fst/script/script-impl.h>
+#include <fst/script/difference.h>
+
+namespace fst {
+namespace script {
+
+void Difference(const FstClass &ifst1, const FstClass &ifst2,
+                MutableFstClass *ofst, ComposeFilter compose_filter) {
+  if (!ArcTypesMatch(ifst1, ifst2, "Difference") ||
+      !ArcTypesMatch(*ofst, ifst1, "Difference")) return;
+
+  DifferenceArgs1 args(ifst1, ifst2, ofst, compose_filter);
+  Apply<Operation<DifferenceArgs1> >("Difference", ifst1.ArcType(), &args);
+}
+
+void Difference(const FstClass &ifst1, const FstClass &ifst2,
+                MutableFstClass *ofst, const ComposeOptions &copts) {
+  if (!ArcTypesMatch(ifst1, ifst2, "Difference") ||
+      !ArcTypesMatch(*ofst, ifst1, "Difference")) return;
+
+  DifferenceArgs2 args(ifst1, ifst2, ofst, copts);
+  Apply<Operation<DifferenceArgs2> >("Difference", ifst1.ArcType(), &args);
+}
+
+REGISTER_FST_OPERATION(Difference, StdArc, DifferenceArgs1);
+REGISTER_FST_OPERATION(Difference, LogArc, DifferenceArgs1);
+REGISTER_FST_OPERATION(Difference, Log64Arc, DifferenceArgs1);
+REGISTER_FST_OPERATION(Difference, StdArc, DifferenceArgs2);
+REGISTER_FST_OPERATION(Difference, LogArc, DifferenceArgs2);
+REGISTER_FST_OPERATION(Difference, Log64Arc, DifferenceArgs2);
+
+}  // namespace script
+}  // namespace fst