1 // fstreverse.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) Changed to use FstClass
18 //
19 // \file
20 // Reverses the paths in an FST.
21 //
22
23 #include <string>
24
25 #include <fst/script/reverse.h>
26 #include <fst/script/fst-class.h>
27 #include <iostream>
28 #include <fstream>
29
main(int argc,char ** argv)30 int main(int argc, char **argv) {
31 using fst::script::FstClass;
32 using fst::script::VectorFstClass;
33 using fst::script::Reverse;
34
35 string usage = "Reverses the paths in an FST.\n\n Usage: ";
36 usage += argv[0];
37 usage += " [in.fst [out.fst]]\n";
38
39 std::set_new_handler(FailedNewHandler);
40 SetFlags(usage.c_str(), &argc, &argv, true);
41 if (argc > 3) {
42 ShowUsage();
43 return 1;
44 }
45
46 string in_name = (argc > 1 && (strcmp(argv[1], "-") != 0)) ? argv[1] : "";
47 string out_name = argc > 2 ? argv[2] : "";
48
49 FstClass *ifst = FstClass::Read(in_name);
50 if (!ifst) return 1;
51
52 VectorFstClass *out = new VectorFstClass(ifst->ArcType());
53
54 Reverse(*ifst, out);
55
56 out->Write(out_name);
57
58 return 0;
59 }
60