1 // pdtreplace.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 // Converts an RTN represented by FSTs and non-terminal labels into a PDT . 19 20 #include <utility> 21 using std::pair; using std::make_pair; 22 #include <vector> 23 using std::vector; 24 #include <fst/extensions/pdt/pdtscript.h> 25 #include <fst/vector-fst.h> 26 #include <fst/util.h> 27 28 DEFINE_string(pdt_parentheses, "", "PDT parenthesis label pairs."); 29 30 int main(int argc, char **argv) { 31 namespace s = fst::script; 32 33 string usage = "Converts an RTN represented by FSTs"; 34 usage += " and non-terminal labels into PDT"; 35 usage += " Usage: "; 36 usage += argv[0]; 37 usage += " root.fst rootlabel [rule1.fst label1 ...] [out.fst]\n"; 38 39 std::set_new_handler(FailedNewHandler); 40 SET_FLAGS(usage.c_str(), &argc, &argv, true); 41 if (argc < 4) { 42 ShowUsage(); 43 return 1; 44 } 45 46 string in_fname = argv[1]; 47 string out_fname = argc % 2 == 0 ? argv[argc - 1] : ""; 48 49 s::FstClass *ifst = s::FstClass::Read(in_fname); 50 if (!ifst) return 1; 51 52 typedef int64 Label; 53 typedef pair<Label, const s::FstClass* > FstTuple; 54 vector<FstTuple> fst_tuples; 55 Label root = atoll(argv[2]); 56 fst_tuples.push_back(make_pair(root, ifst)); 57 58 for (size_t i = 3; i < argc - 1; i += 2) { 59 ifst = s::FstClass::Read(argv[i]); 60 if (!ifst) return 1; 61 Label lab = atoll(argv[i + 1]); 62 fst_tuples.push_back(make_pair(lab, ifst)); 63 } 64 65 s::VectorFstClass ofst(ifst->ArcType()); 66 vector<pair<int64, int64> > parens; 67 s::PdtReplace(fst_tuples, &ofst, &parens, root); 68 69 if (!FLAGS_pdt_parentheses.empty()) 70 fst::WriteLabelPairs(FLAGS_pdt_parentheses, parens); 71 72 ofst.Write(out_fname); 73 74 return 0; 75 } 76
