FST  openfst-1.8.3
OpenFst Library
fstunion-main.cc
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1 // Copyright 2005-2024 Google LLC
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 // See www.openfst.org for extensive documentation on this weighted
16 // finite-state transducer library.
17 //
18 // Creates the union of two FSTs.
19 
20 #include <cstring>
21 #include <memory>
22 #include <string>
23 
24 #include <fst/flags.h>
25 #include <fst/log.h>
26 #include <fst/script/fst-class.h>
27 #include <fst/script/union.h>
28 
29 int fstunion_main(int argc, char **argv) {
30  namespace s = fst::script;
33 
34  std::string usage = "Creates the union of two FSTs.\n\n Usage: ";
35  usage += argv[0];
36  usage += " in1.fst in2.fst [out.fst]\n";
37 
38  SET_FLAGS(usage.c_str(), &argc, &argv, true);
39  if (argc < 3 || argc > 4) {
40  ShowUsage();
41  return 1;
42  }
43 
44  const std::string in1_name = strcmp(argv[1], "-") != 0 ? argv[1] : "";
45  const std::string in2_name = strcmp(argv[2], "-") != 0 ? argv[2] : "";
46  const std::string out_name =
47  argc > 3 && strcmp(argv[3], "-") != 0 ? argv[3] : "";
48 
49  if (in1_name.empty() && in2_name.empty()) {
50  LOG(ERROR) << argv[0] << ": Can't take both inputs from standard input";
51  return 1;
52  }
53 
54  std::unique_ptr<MutableFstClass> fst1(MutableFstClass::Read(in1_name, true));
55  if (!fst1) return 1;
56 
57  std::unique_ptr<FstClass> fst2(FstClass::Read(in2_name));
58  if (!fst2) return 1;
59 
60  s::Union(fst1.get(), *fst2);
61 
62  return !fst1->Write(out_name);
63 }
void ShowUsage(bool long_usage=true)
Definition: flags.cc:138
#define LOG(type)
Definition: log.h:53
#define SET_FLAGS(usage, argc, argv, rmflags)
Definition: flags.h:226
void Union(RationalFst< Arc > *fst1, const Fst< Arc > &fst2)
Definition: union.h:117
int fstunion_main(int argc, char **argv)