1// fstdeterminize.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: riley@google.com (Michael Riley)
17// Modified: jpr@google.com (Jake Ratkiewicz) to use FstClass
18//
19// \file
20// Determinizes an FST.
21//
22
23#include <fst/script/determinize.h>
24
25DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta");
26DEFINE_int64(nstate, fst::kNoStateId, "State number threshold");
27DEFINE_string(weight, "", "Weight threshold");
28DEFINE_int64(subsequential_label, 0,
29             "Input label of arc corresponding to residual final output when"
30             " producing a subsequential transducer");
31
32int main(int argc, char **argv) {
33  namespace s = fst::script;
34  using fst::script::FstClass;
35  using fst::script::MutableFstClass;
36  using fst::script::VectorFstClass;
37  using fst::script::WeightClass;
38
39  string usage = "Determinizes an FST.\n\n  Usage: ";
40  usage += argv[0];
41  usage += " [in.fst [out.fst]]\n";
42
43  std::set_new_handler(FailedNewHandler);
44  SetFlags(usage.c_str(), &argc, &argv, true);
45  if (argc > 3) {
46    ShowUsage();
47    return 1;
48  }
49
50  string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
51  string out_name = argc > 2 ? argv[2] : "";
52
53  FstClass *ifst = FstClass::Read(in_name);
54  if (!ifst) return 1;
55
56  VectorFstClass ofst(ifst->ArcType());
57
58  s::DeterminizeOptions opts(
59      FLAGS_delta, FLAGS_weight.empty() ?
60      WeightClass::Zero() : WeightClass(ifst->WeightType(), FLAGS_weight),
61      FLAGS_nstate, FLAGS_subsequential_label);
62
63  s::Determinize(*ifst, &ofst, opts);
64
65  ofst.Write(out_name);
66
67  return 0;
68}
69