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      1 
      2 // Licensed under the Apache License, Version 2.0 (the "License");
      3 // you may not use this file except in compliance with the License.
      4 // You may obtain a copy of the License at
      5 //
      6 //     http://www.apache.org/licenses/LICENSE-2.0
      7 //
      8 // Unless required by applicable law or agreed to in writing, software
      9 // distributed under the License is distributed on an "AS IS" BASIS,
     10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     11 // See the License for the specific language governing permissions and
     12 // limitations under the License.
     13 //
     14 // Copyright 2005-2010 Google, Inc.
     15 // Author: jpr (at) google.com (Jake Ratkiewicz)
     16 
     17 #ifndef FST_SCRIPT_DIFFERENCE_H_
     18 #define FST_SCRIPT_DIFFERENCE_H_
     19 
     20 #include <fst/script/arg-packs.h>
     21 #include <fst/script/fst-class.h>
     22 #include <fst/script/compose.h>  // for ComposeFilter
     23 #include <fst/difference.h>
     24 
     25 namespace fst {
     26 namespace script {
     27 
     28 typedef args::Package<const FstClass&, const FstClass&,
     29                       MutableFstClass*, ComposeFilter> DifferenceArgs1;
     30 
     31 template<class Arc>
     32 void Difference(DifferenceArgs1 *args) {
     33   const Fst<Arc> &ifst1 = *(args->arg1.GetFst<Arc>());
     34   const Fst<Arc> &ifst2 = *(args->arg2.GetFst<Arc>());
     35   MutableFst<Arc> *ofst = args->arg3->GetMutableFst<Arc>();
     36 
     37   Difference(ifst1, ifst2, ofst, args->arg4);
     38 }
     39 
     40 typedef args::Package<const FstClass&, const FstClass&,
     41                       MutableFstClass*, const ComposeOptions &> DifferenceArgs2;
     42 
     43 template<class Arc>
     44 void Difference(DifferenceArgs2  *args) {
     45   const Fst<Arc> &ifst1 = *(args->arg1.GetFst<Arc>());
     46   const Fst<Arc> &ifst2 = *(args->arg2.GetFst<Arc>());
     47   MutableFst<Arc> *ofst = args->arg3->GetMutableFst<Arc>();
     48 
     49   Difference(ifst1, ifst2, ofst, args->arg4);
     50 }
     51 
     52 
     53 void Difference(const FstClass &ifst1, const FstClass &ifst2,
     54                 MutableFstClass *ofst,
     55                 ComposeFilter compose_filter);
     56 
     57 void Difference(const FstClass &ifst1, const FstClass &ifst2,
     58                 MutableFstClass *ofst,
     59                 const ComposeOptions &opts = fst::script::ComposeOptions());
     60 
     61 
     62 }  // namespace script
     63 }  // namespace fst
     64 
     65 
     66 
     67 #endif  // FST_SCRIPT_DIFFERENCE_H_
     68