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@google.com (Jake Ratkiewicz)
16
17 #ifndef FST_SCRIPT_COMPILE_H_
18 #define FST_SCRIPT_COMPILE_H_
19
20 #include <fst/script/arg-packs.h>
21 #include <fst/script/fst-class.h>
22 #include <fst/script/compile-impl.h>
23
24 namespace fst {
25 namespace script {
26
27 // Note: it is safe to pass these strings as references because
28 // this struct is only used to pass them deeper in the call graph.
29 // Be sure you understand why this is so before using this struct
30 // for anything else!
31 struct FstCompileArgs {
32 fst::istream &istrm;
33 const string &source;
34 const string &dest;
35 const string &fst_type;
36 const fst::SymbolTable *isyms;
37 const fst::SymbolTable *osyms;
38 const fst::SymbolTable *ssyms;
39 const bool accep;
40 const bool ikeep;
41 const bool okeep;
42 const bool nkeep;
43 const bool allow_negative_labels;
44
45 FstCompileArgs(istream &istrm, const string &source, const string &dest,
46 const string &fst_type, const fst::SymbolTable *isyms,
47 const fst::SymbolTable *osyms,
48 const fst::SymbolTable *ssyms,
49 bool accep, bool ikeep, bool okeep, bool nkeep,
50 bool allow_negative_labels = false) :
istrmFstCompileArgs51 istrm(istrm), source(source), dest(dest), fst_type(fst_type),
52 isyms(isyms), osyms(osyms), ssyms(ssyms), accep(accep), ikeep(ikeep),
53 okeep(okeep), nkeep(nkeep),
54 allow_negative_labels(allow_negative_labels) { }
55 };
56
57 template<class Arc>
CompileFst(FstCompileArgs * args)58 void CompileFst(FstCompileArgs *args) {
59 using fst::FstCompiler;
60 using fst::Convert;
61 using fst::Fst;
62
63 FstCompiler<Arc> fstcompiler(args->istrm, args->source, args->isyms,
64 args->osyms, args->ssyms,
65 args->accep, args->ikeep,
66 args->okeep, args->nkeep,
67 args->allow_negative_labels);
68
69 const Fst<Arc> *fst = &fstcompiler.Fst();
70 if (args->fst_type != "vector") {
71 fst = Convert<Arc>(*fst, args->fst_type);
72 if (!fst) {
73 FSTERROR() << "Failed to convert FST to desired type: "
74 << args->fst_type;
75 return;
76 }
77 }
78
79 fst->Write(args->dest);
80 }
81
82 void CompileFst(istream &istrm, const string &source, const string &dest,
83 const string &fst_type, const string &arc_type,
84 const SymbolTable *isyms,
85 const SymbolTable *osyms, const SymbolTable *ssyms,
86 bool accep, bool ikeep, bool okeep, bool nkeep,
87 bool allow_negative_labels);
88
89 } // namespace script
90 } // namespace fst
91
92 #endif // FST_SCRIPT_COMPILE_H_
93