1 // fstinvert.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 // Inverts a transduction.
21 //
22
23 #include <fst/script/invert.h>
24
main(int argc,char ** argv)25 int main(int argc, char **argv) {
26 namespace s = fst::script;
27 using fst::script::FstClass;
28 using fst::script::MutableFstClass;
29
30 string usage = "Inverts a transduction.\n\n Usage: ";
31 usage += argv[0];
32 usage += " [in.fst [out.fst]]\n";
33
34 std::set_new_handler(FailedNewHandler);
35 SetFlags(usage.c_str(), &argc, &argv, true);
36 if (argc > 3) {
37 ShowUsage();
38 return 1;
39 }
40
41 string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
42 string out_name = argc > 2 ? argv[2] : "";
43
44 MutableFstClass *fst = MutableFstClass::Read(in_name, true);
45 if (!fst) return 1;
46
47 s::Invert(fst);
48 fst->Write(out_name);
49
50 return 0;
51 }
52