1 // fstintersect.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 (at) google.com (Michael Riley) 17 // Modified: jpr (at) google.com (Jake Ratkiewicz) to use FstClass 18 // 19 // \file 20 // Intersects two FSTs. 21 // 22 23 #include <fst/script/intersect.h> 24 #include <fst/script/connect.h> 25 26 DEFINE_string(compose_filter, "auto", 27 "Composition filter, one of: \"alt_sequence\", \"auto\", " 28 "\"match\", \"sequence\""); 29 DEFINE_bool(connect, true, "Trim output"); 30 31 int main(int argc, char **argv) { 32 namespace s = fst::script; 33 using fst::script::FstClass; 34 using fst::script::VectorFstClass; 35 36 37 string usage = "Intersects two FSAs.\n\n Usage: "; 38 usage += argv[0]; 39 usage += " in1.fst in2.fst [out.fst]\n"; 40 usage += " Flags: connect\n"; 41 42 std::set_new_handler(FailedNewHandler); 43 SET_FLAGS(usage.c_str(), &argc, &argv, true); 44 if (argc < 3 || argc > 4) { 45 ShowUsage(); 46 return 1; 47 } 48 49 string in1_name = strcmp(argv[1], "-") == 0 ? "" : argv[1]; 50 string in2_name = strcmp(argv[2], "-") == 0 ? "" : argv[2]; 51 string out_name = argc > 3 ? argv[3] : ""; 52 53 if (in1_name.empty() && in2_name.empty()) { 54 LOG(ERROR) << argv[0] << ": Can't take both inputs from standard input."; 55 return 1; 56 } 57 58 FstClass *ifst1 = FstClass::Read(in1_name); 59 if (!ifst1) return 1; 60 FstClass *ifst2 = FstClass::Read(in2_name); 61 if (!ifst2) return 1; 62 63 VectorFstClass ofst(ifst1->ArcType()); 64 65 fst::ComposeFilter compose_filter; 66 67 if (FLAGS_compose_filter == "alt_sequence") { 68 compose_filter = fst::ALT_SEQUENCE_FILTER; 69 } else if (FLAGS_compose_filter == "auto") { 70 compose_filter = fst::AUTO_FILTER; 71 } else if (FLAGS_compose_filter == "match") { 72 compose_filter = fst::MATCH_FILTER; 73 } else if (FLAGS_compose_filter == "sequence") { 74 compose_filter = fst::SEQUENCE_FILTER; 75 } else { 76 LOG(ERROR) << argv[0] << "Unknown compose filter type: " 77 << FLAGS_compose_filter; 78 return 1; 79 } 80 81 fst::IntersectOptions opts(FLAGS_connect, compose_filter); 82 83 s::Intersect(*ifst1, *ifst2, &ofst, opts); 84 85 ofst.Write(out_name); 86 87 return 0; 88 } 89
