FST  openfst-1.8.3
OpenFst Library
pdtcompose-main.cc
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1 // Copyright 2005-2024 Google LLC
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 // See www.openfst.org for extensive documentation on this weighted
16 // finite-state transducer library.
17 //
18 // Composes a PDT and an FST.
19 
20 #include <cstdint>
21 #include <cstring>
22 #include <memory>
23 #include <string>
24 #include <utility>
25 #include <vector>
26 
27 #include <fst/flags.h>
28 #include <fst/log.h>
32 #include <fst/util.h>
33 #include <fst/script/fst-class.h>
34 
35 DECLARE_string(pdt_parentheses);
36 DECLARE_bool(left_pdt);
37 DECLARE_bool(connect);
38 DECLARE_string(compose_filter);
39 
40 int pdtcompose_main(int argc, char **argv) {
41  namespace s = fst::script;
44  using fst::ReadLabelPairs;
47 
48  std::string usage = "Compose a PDT and an FST.\n\n Usage: ";
49  usage += argv[0];
50  usage += " in.pdt in.fst [out.pdt]\n";
51  usage += " in.fst in.pdt [out.pdt]\n";
52 
53  SET_FLAGS(usage.c_str(), &argc, &argv, true);
54  if (argc < 3 || argc > 4) {
55  ShowUsage();
56  return 1;
57  }
58 
59  const std::string in1_name = strcmp(argv[1], "-") == 0 ? "" : argv[1];
60  const std::string in2_name = strcmp(argv[2], "-") == 0 ? "" : argv[2];
61  const std::string out_name =
62  argc > 3 && strcmp(argv[3], "-") != 0 ? argv[3] : "";
63 
64  if (in1_name.empty() && in2_name.empty()) {
65  LOG(ERROR) << argv[0] << ": Can't take both inputs from standard input.";
66  return 1;
67  }
68 
69  std::unique_ptr<FstClass> ifst1(FstClass::Read(in1_name));
70  if (!ifst1) return 1;
71  std::unique_ptr<FstClass> ifst2(FstClass::Read(in2_name));
72  if (!ifst2) return 1;
73 
74  if (FST_FLAGS_pdt_parentheses.empty()) {
75  LOG(ERROR) << argv[0] << ": No PDT parenthesis label pairs provided";
76  return 1;
77  }
78 
79  std::vector<std::pair<int64_t, int64_t>> parens;
80  if (!ReadLabelPairs(FST_FLAGS_pdt_parentheses, &parens)) return 1;
81 
82  VectorFstClass ofst(ifst1->ArcType());
83 
84  PdtComposeFilter compose_filter;
85  if (!s::GetPdtComposeFilter(FST_FLAGS_compose_filter,
86  &compose_filter)) {
87  LOG(ERROR) << argv[0] << ": Unknown or unsupported compose filter type: "
88  << FST_FLAGS_compose_filter;
89  return 1;
90  }
91 
92  const PdtComposeOptions copts(FST_FLAGS_connect, compose_filter);
93 
94  s::Compose(*ifst1, *ifst2, parens, &ofst, copts,
95  FST_FLAGS_left_pdt);
96 
97  return !ofst.Write(out_name);
98 }
void ShowUsage(bool long_usage=true)
Definition: flags.cc:138
DECLARE_string(pdt_parentheses)
#define LOG(type)
Definition: log.h:53
DECLARE_bool(left_pdt)
#define SET_FLAGS(usage, argc, argv, rmflags)
Definition: flags.h:226
int pdtcompose_main(int argc, char **argv)
bool GetPdtComposeFilter(std::string_view str, PdtComposeFilter *cf)
Definition: getters.cc:29
bool ReadLabelPairs(std::string_view source, std::vector< std::pair< Label, Label >> *pairs)
Definition: util.h:422
void Compose(const FstClass &ifst1, const FstClass &ifst2, const std::vector< std::pair< int64_t, int64_t >> &parens, const std::vector< int64_t > &assignments, MutableFstClass *ofst, const MPdtComposeOptions &copts, bool left_pdt)
Definition: mpdtscript.cc:41
PdtComposeFilter
Definition: compose.h:466