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      1 // fstconvert.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 // Converts an FST to another type.
     21 //
     22 
     23 #include <fst/script/convert.h>
     24 
     25 DEFINE_string(fst_type, "vector", "Output FST type");
     26 
     27 int main(int argc, char **argv) {
     28   namespace s = fst::script;
     29   using fst::script::FstClass;
     30 
     31   string usage = "Converts an FST to another type.\n\n  Usage: ";
     32   usage += argv[0];
     33   usage += " [in.fst [out.fst]]\n";
     34 
     35   std::set_new_handler(FailedNewHandler);
     36   SET_FLAGS(usage.c_str(), &argc, &argv, true);
     37   if (argc > 3) {
     38     ShowUsage();
     39     return 1;
     40   }
     41 
     42   string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
     43   string out_name = argc > 2 ? argv[2] : "";
     44 
     45   FstClass *ifst = FstClass::Read(in_name);
     46   if (!ifst) return 1;
     47 
     48   FstClass *ofst = ifst;
     49   if (!ofst) return 1;
     50 
     51   if (ofst->FstType() != FLAGS_fst_type) {
     52     ofst = s::Convert(*ifst, FLAGS_fst_type);
     53   }
     54 
     55   ofst->Write(out_name);
     56 
     57   return 0;
     58 }
     59