1// fstmap.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// Applies an operation to each arc of an FST.
21//
22
23#include <string>
24
25#include <fst/script/map.h>
26
27DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta");
28DEFINE_string(map_type, "identity",
29              "Map operation, one of: \"arc_sum\", \"identity\", \"invert\", "
30              "\"plus (--weight)\", \"quantize (--delta)\", \"rmweight\", "
31              "\"superfinal\", \"times (--weight)\", \"to_log\", \"to_log64\", "
32              "\"to_standard\"");
33DEFINE_string(weight, "", "Weight parameter");
34
35int main(int argc, char **argv) {
36  namespace s = fst::script;
37  using fst::script::FstClass;
38  using fst::script::MutableFstClass;
39  using fst::script::VectorFstClass;
40
41  string usage = "Applies an operation to each arc of an FST.\n\n  Usage: ";
42  usage += argv[0];
43  usage += " [in.fst [out.fst]]\n";
44
45  std::set_new_handler(FailedNewHandler);
46  SET_FLAGS(usage.c_str(), &argc, &argv, true);
47  if (argc > 3) {
48    ShowUsage();
49    return 1;
50  }
51
52  string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
53  string out_name = argc > 2 ? argv[2] : "";
54
55  FstClass *ifst = FstClass::Read(in_name);
56  if (!ifst) return 1;
57
58  s::WeightClass w = !FLAGS_weight.empty() ?
59      s::WeightClass(ifst->WeightType(), FLAGS_weight) :
60      (FLAGS_map_type == "times" ?
61       s::WeightClass::One() : s::WeightClass::Zero());
62
63  s::MapType mt;
64  if (FLAGS_map_type == "arc_sum") {
65    mt = s::ARC_SUM_MAPPER;
66  } else if (FLAGS_map_type == "identity") {
67    mt = s::IDENTITY_MAPPER;
68  } else if (FLAGS_map_type == "invert") {
69    mt = s::INVERT_MAPPER;
70  } else if (FLAGS_map_type == "plus") {
71    mt = s::PLUS_MAPPER;
72  } else if (FLAGS_map_type == "quantize") {
73    mt = s::QUANTIZE_MAPPER;
74  } else if (FLAGS_map_type == "rmweight") {
75    mt = s::RMWEIGHT_MAPPER;
76  } else if (FLAGS_map_type == "superfinal") {
77    mt = s::SUPERFINAL_MAPPER;
78  } else if (FLAGS_map_type == "times") {
79    mt = s::TIMES_MAPPER;
80  } else if (FLAGS_map_type == "to_log") {
81    mt = s::TO_LOG_MAPPER;
82  } else if (FLAGS_map_type == "to_log64") {
83    mt = s::TO_LOG64_MAPPER;
84  } else if (FLAGS_map_type == "to_standard") {
85    mt = s::TO_STD_MAPPER;
86  } else {
87    LOG(ERROR) << argv[0] << ": Unknown map type \""
88               << FLAGS_map_type << "\"\n";
89    return 1;
90  }
91
92  FstClass *ofst = s::Map(*ifst, mt, FLAGS_delta, w);
93
94  ofst->Write(out_name);
95
96  return 0;
97}
98