1 // pdtreverse.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 // 18 // \file 19 // Reverse a PDT. 20 // 21 22 #include <fst/extensions/pdt/pdtscript.h> 23 #include <fst/util.h> 24 25 DEFINE_string(pdt_parentheses, "", "PDT parenthesis label pairs."); 26 27 int main(int argc, char **argv) { 28 namespace s = fst::script; 29 30 string usage = "Reverse a PDT.\n\n Usage: "; 31 usage += argv[0]; 32 usage += " in.pdt [out.fst]\n"; 33 34 std::set_new_handler(FailedNewHandler); 35 SET_FLAGS(usage.c_str(), &argc, &argv, true); 36 if (argc > 3) { 37 ShowUsage(); 38 return 1; 39 } 40 41 string in_name = (argc > 1 && (strcmp(argv[1], "-") != 0)) ? argv[1] : ""; 42 string out_name = argc > 2 ? argv[2] : ""; 43 44 s::FstClass *ifst = s::FstClass::Read(in_name); 45 if (!ifst) return 1; 46 47 if (FLAGS_pdt_parentheses.empty()) { 48 LOG(ERROR) << argv[0] << ": No PDT parenthesis label pairs provided"; 49 return 1; 50 } 51 52 vector<pair<int64, int64> > parens, rparens; 53 fst::ReadLabelPairs(FLAGS_pdt_parentheses, &parens, false); 54 55 s::VectorFstClass ofst(ifst->ArcType()); 56 s::PdtReverse(*ifst, parens, &ofst); 57 58 ofst.Write(out_name); 59 60 return 0; 61 } 62
