1 // fstcompose.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 // Composes two FSTs.
21 //
22
23 #include <fst/script/compose.h>
24 #include <fst/script/connect.h>
25
26
27 DEFINE_string(compose_filter, "auto",
28 "Composition filter, one of: \"alt_sequence\", \"auto\", "
29 "\"match\", \"sequence\"");
30 DEFINE_bool(connect, true, "Trim output");
31
32
main(int argc,char ** argv)33 int main(int argc, char **argv) {
34 namespace s = fst::script;
35 using fst::script::FstClass;
36 using fst::script::MutableFstClass;
37 using fst::script::VectorFstClass;
38
39 string usage = "Composes two FSTs.\n\n Usage: ";
40 usage += argv[0];
41 usage += " in1.fst in2.fst [out.fst]\n";
42
43 std::set_new_handler(FailedNewHandler);
44 SetFlags(usage.c_str(), &argc, &argv, true);
45 if (argc < 3 || argc > 4) {
46 ShowUsage();
47 return 1;
48 }
49
50 string in1_name = strcmp(argv[1], "-") != 0 ? argv[1] : "";
51 string in2_name = (argc > 2 && (strcmp(argv[2], "-") != 0)) ? argv[2] : "";
52 string out_name = argc > 3 ? argv[3] : "";
53
54 if (in1_name.empty() && in2_name.empty()) {
55 LOG(ERROR) << argv[0] << ": Can't take both inputs from standard input.";
56 return 1;
57 }
58
59 FstClass *ifst1 = FstClass::Read(in1_name);
60 if (!ifst1) return 1;
61
62 FstClass *ifst2 = FstClass::Read(in2_name);
63 if (!ifst2) return 1;
64
65 if (ifst1->ArcType() != ifst2->ArcType()) {
66 LOG(ERROR) << argv[0] << ": Input FSTs must have the same arc type.";
67 return 1;
68 }
69
70 VectorFstClass ofst(ifst1->ArcType());
71
72 fst::ComposeFilter compose_filter;
73
74 if (FLAGS_compose_filter == "alt_sequence") {
75 compose_filter = fst::ALT_SEQUENCE_FILTER;
76 } else if (FLAGS_compose_filter == "auto") {
77 compose_filter = fst::AUTO_FILTER;
78 } else if (FLAGS_compose_filter == "match") {
79 compose_filter = fst::MATCH_FILTER;
80 } else if (FLAGS_compose_filter == "sequence") {
81 compose_filter = fst::SEQUENCE_FILTER;
82 } else {
83 LOG(ERROR) << argv[0] << "Unknown compose filter type: "
84 << FLAGS_compose_filter;
85 return 1;
86 }
87
88 fst::ComposeOptions opts(FLAGS_connect, compose_filter);
89
90 s::Compose(*ifst1, *ifst2, &ofst, opts);
91
92 ofst.Write(out_name);
93
94 return 0;
95 }
96