1// fstepsnormalize.cc
2
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15// Copyright 2005-2010 Google, Inc.
16// Author: allauzen@google.com (Cyril Allauzen)
17// Modified: jpr@google.com (Jake Ratkiewicz) to use FstClass
18//
19// \file
20// Epsilon normalizes an FST.
21//
22
23#include <fst/script/epsnormalize.h>
24
25DEFINE_bool(eps_norm_output, false, "Normalize output epsilons");
26
27int main(int argc, char **argv) {
28  namespace s = fst::script;
29  using fst::script::FstClass;
30  using fst::script::VectorFstClass;
31
32
33  string usage = "Epsilon normalizes an FST.\n\n  Usage: ";
34  usage += argv[0];
35  usage += " [in.fst [out.fst]]\n";
36
37  std::set_new_handler(FailedNewHandler);
38  SetFlags(usage.c_str(), &argc, &argv, true);
39  if (argc > 3) {
40    ShowUsage();
41    return 1;
42  }
43
44  string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
45  string out_name = argc > 2 ? argv[2] : "";
46
47  FstClass *ifst = FstClass::Read(in_name);
48  if (!ifst) return 1;
49
50  fst::EpsNormalizeType eps_norm_type = FLAGS_eps_norm_output ?
51      fst::EPS_NORM_OUTPUT : fst::EPS_NORM_INPUT;
52
53  VectorFstClass ofst(ifst->ArcType());
54  s::EpsNormalize(*ifst, &ofst, eps_norm_type);
55  ofst.Write(out_name);
56
57  return 0;
58}
59