1 files changed, 67 insertions, 0 deletions
diff --git a/src/bin/fstunion.cc b/src/bin/fstunion.cc
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+++ b/src/bin/fstunion.cc
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+// fstunion.cc
+
+// 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: riley@google.com (Michael Riley)
+// Modified: jpr@google.com (Jake Ratkiewicz) - to use FstClass
+//
+// \file
+// Creates the union of two FSTs.
+//
+
+#include <string>
+
+#include <fst/script/union.h>
+#include <iostream>
+#include <fstream>
+
+int main(int argc, char **argv) {
+  using fst::script::FstClass;
+  using fst::script::MutableFstClass;
+  using fst::script::Union;
+
+  string usage = "Creates the union of two FSTs.\n\n  Usage: ";
+  usage += argv[0];
+  usage += " in1.fst in2.fst [out.fst]\n";
+
+  std::set_new_handler(FailedNewHandler);
+  SetFlags(usage.c_str(), &argc, &argv, true);
+  if (argc < 3 || argc > 4) {
+    ShowUsage();
+    return 1;
+  }
+
+  string in1_name = strcmp(argv[1], "-") != 0 ? argv[1] : "";
+  string in2_name = strcmp(argv[2], "-") != 0 ? argv[2] : "";
+  string out_name = argc > 3 ? argv[3] : "";
+
+  if (in1_name == "" && in2_name == "") {
+    LOG(ERROR) << argv[0]
+               << ": Can't use standard i/o for both inputs.";
+    return 1;
+  }
+
+  MutableFstClass *fst1 = MutableFstClass::Read(in1_name, true);
+  if (!fst1) return 1;
+
+  FstClass *fst2 = FstClass::Read(in2_name);
+  if (!fst2) {
+    return 1;
+  }
+
+  Union(fst1, *fst2);
+  fst1->Write(out_name);
+
+  return 0;
+}