1// fstarcsort.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// Sorts arcs of an FST.
21//
22
23#include <string>
24
25#include <fst/compat.h>
26#include <fst/script/arcsort.h>
27
28DEFINE_string(sort_type, "ilabel",
29              "Comparison method, one of: \"ilabel\", \"olabel\"");
30
31int main(int argc, char **argv) {
32  using fst::script::FstClass;
33  using fst::script::MutableFstClass;
34  using fst::script::ArcSort;
35
36  string usage = "Sorts arcs of an FST.\n\n  Usage: ";
37  usage += argv[0];
38  usage += " [in.fst [out.fst]]\n";
39
40  std::set_new_handler(FailedNewHandler);
41  SET_FLAGS(usage.c_str(), &argc, &argv, true);
42
43  if (argc > 3) {
44    ShowUsage();
45    return 1;
46  }
47
48  string in_name = (argc > 1 && (strcmp(argv[1], "-") != 0)) ? argv[1] : "";
49  string out_name = argc > 2 ? argv[2] : "";
50
51  MutableFstClass *fst = MutableFstClass::Read(in_name, true);
52  if (!fst) return 1;
53
54  if (FLAGS_sort_type == "ilabel") {
55    ArcSort(fst, fst::script::ILABEL_COMPARE);
56  } else if (FLAGS_sort_type == "olabel") {
57    ArcSort(fst, fst::script::OLABEL_COMPARE);
58  } else {
59    LOG(ERROR) << argv[0] << ": Unknown sort type \""
60               << FLAGS_sort_type << "\"\n";
61    return 1;
62  }
63
64  fst->Write(out_name);
65
66  return 0;
67}
68