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1 // fstproject.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 work with FstClass
18 //
19 // \file
20 // Projects a transduction onto its input or output language.
21 //
22 
23 #include <fst/script/project.h>
24 
25 DEFINE_bool(project_output, false, "Project on output (vs. input)");
26 
main(int argc,char ** argv)27 int main(int argc, char **argv) {
28   namespace s = fst::script;
29   using fst::script::FstClass;
30   using fst::script::MutableFstClass;
31 
32   string usage = "Projects a transduction onto its input"
33       " or output language.\n\n  Usage: ";
34   usage += argv[0];
35   usage += " [in.fst [out.fst]]\n";
36 
37   std::set_new_handler(FailedNewHandler);
38   SET_FLAGS(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   MutableFstClass *fst = MutableFstClass::Read(in_name, true);
48   if (!fst) return 1;
49 
50   fst::ProjectType project_type = FLAGS_project_output ?
51       fst::PROJECT_OUTPUT : fst::PROJECT_INPUT;
52 
53   s::Project(fst, project_type);
54 
55   fst->Write(out_name);
56 
57   return 0;
58 }
59