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tools/openfst-1.6.7/src/extensions/far/far-class.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
#include <fst/extensions/far/far-class.h>
#include <fst/script/script-impl.h>
#include <fst/extensions/far/script-impl.h>
namespace fst {
namespace script {
// FarReaderClass.
FarReaderClass *FarReaderClass::Open(const string &filename) {
OpenFarReaderClassArgs1 args(filename);
args.retval = nullptr;
Apply<Operation<OpenFarReaderClassArgs1>>("OpenFarReaderClass",
LoadArcTypeFromFar(filename),
&args);
return args.retval;
}
FarReaderClass *FarReaderClass::Open(const std::vector<string> &filenames) {
if (filenames.empty()) {
LOG(ERROR) << "FarReaderClass::Open: No files specified";
return nullptr;
}
auto it = filenames.cbegin();
const auto arc_type = LoadArcTypeFromFar(*it);
if (arc_type.empty()) return nullptr;
// FIXME(kbg): Is any of this really necessary? I am doing this purely
// to conform to what I did with fst::script::Replace.
++it;
for (; it != filenames.cend(); ++it) {
const string other_arc_type = LoadArcTypeFromFar(*it);
if (other_arc_type.empty()) return nullptr;
if (arc_type != other_arc_type) {
LOG(ERROR) << "FarReaderClass::Open: Trying to open FARs with "
<< "non-matching arc types:
\t" << arc_type << " and "
<< other_arc_type;
return nullptr;
}
}
OpenFarReaderClassArgs2 args(filenames);
args.retval = nullptr;
Apply<Operation<OpenFarReaderClassArgs2>>("OpenFarReaderClass", arc_type,
&args);
return args.retval;
}
REGISTER_FST_OPERATION(OpenFarReaderClass, StdArc, OpenFarReaderClassArgs1);
REGISTER_FST_OPERATION(OpenFarReaderClass, LogArc, OpenFarReaderClassArgs1);
REGISTER_FST_OPERATION(OpenFarReaderClass, Log64Arc, OpenFarReaderClassArgs1);
REGISTER_FST_OPERATION(OpenFarReaderClass, StdArc, OpenFarReaderClassArgs2);
REGISTER_FST_OPERATION(OpenFarReaderClass, LogArc, OpenFarReaderClassArgs2);
REGISTER_FST_OPERATION(OpenFarReaderClass, Log64Arc, OpenFarReaderClassArgs2);
// FarWriterClass.
FarWriterClass *FarWriterClass::Create(const string &filename,
const string &arc_type, FarType type) {
CreateFarWriterClassInnerArgs iargs(filename, type);
CreateFarWriterClassArgs args(iargs);
args.retval = nullptr;
Apply<Operation<CreateFarWriterClassArgs>>("CreateFarWriterClass", arc_type,
&args);
return args.retval;
}
REGISTER_FST_OPERATION(CreateFarWriterClass, StdArc, CreateFarWriterClassArgs);
REGISTER_FST_OPERATION(CreateFarWriterClass, LogArc, CreateFarWriterClassArgs);
REGISTER_FST_OPERATION(CreateFarWriterClass, Log64Arc,
CreateFarWriterClassArgs);
} // namespace script
} // namespace fst
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