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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;
}
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