1 // fstminimize.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 // Minimizes a deterministic FSA.
21 //
22
23 #include <fst/script/minimize.h>
24
25 DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta");
26
27
main(int argc,char ** argv)28 int main(int argc, char **argv) {
29 namespace s = fst::script;
30 using fst::script::FstClass;
31 using fst::script::MutableFstClass;
32 using fst::script::VectorFstClass;
33
34 string usage = "Minimizes a deterministic FST.\n\n Usage: ";
35 usage += argv[0];
36 usage += " [in.fst [out1.fst [out2.fst]]]\n";
37
38 std::set_new_handler(FailedNewHandler);
39 SET_FLAGS(usage.c_str(), &argc, &argv, true);
40 if (argc > 4) {
41 ShowUsage();
42 return 1;
43 }
44
45 string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
46 string out1_name = (argc > 2 && strcmp(argv[2], "-") != 0) ? argv[2] : "";
47 string out2_name = (argc > 3 && strcmp(argv[3], "-") != 0) ? argv[3] : "";
48
49 if (out1_name.empty() && out2_name.empty() && argc > 3) {
50 LOG(ERROR) << "Both outputs can't be standard out.";
51 return 1;
52 }
53
54 MutableFstClass *fst1 = MutableFstClass::Read(in_name, true);
55 if (!fst1) return 1;
56
57 MutableFstClass *fst2 = argc > 3 ?
58 new VectorFstClass(fst1->ArcType()) : 0;
59
60 s::Minimize(fst1, fst2, FLAGS_delta);
61
62 fst1->Write(out1_name);
63 if (fst2)
64 fst2->Write(out2_name);
65
66 return 0;
67 }
68