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// fstreverse.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) Changed to use FstClass
//
// \file
// Reverses the paths in an FST.
//
#include <string>
#include <fst/script/reverse.h>
#include <fst/script/fst-class.h>
#include <iostream>
#include <fstream>
int main(int argc, char **argv) {
using fst::script::FstClass;
using fst::script::VectorFstClass;
using fst::script::Reverse;
string usage = "Reverses the paths in an FST.\n\n Usage: ";
usage += argv[0];
usage += " [in.fst [out.fst]]\n";
std::set_new_handler(FailedNewHandler);
SetFlags(usage.c_str(), &argc, &argv, true);
if (argc > 3) {
ShowUsage();
return 1;
}
string in_name = (argc > 1 && (strcmp(argv[1], "-") != 0)) ? argv[1] : "";
string out_name = argc > 2 ? argv[2] : "";
FstClass *ifst = FstClass::Read(in_name);
if (!ifst) return 1;
VectorFstClass *out = new VectorFstClass(ifst->ArcType());
Reverse(*ifst, out);
out->Write(out_name);
return 0;
}
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