// See www.openfst.org for extensive documentation on this weighted
|
// finite-state transducer library.
|
//
|
// Applies an operation to each arc of an FST.
|
|
#include <cstring>
|
|
#include <memory>
|
#include <string>
|
|
#include <fst/flags.h>
|
#include <fst/log.h>
|
#include <fst/script/getters.h>
|
#include <fst/script/map.h>
|
|
DECLARE_double(delta);
|
DECLARE_string(map_type);
|
DECLARE_double(power);
|
DECLARE_string(weight);
|
|
int fstmap_main(int argc, char **argv) {
|
namespace s = fst::script;
|
using fst::script::FstClass;
|
using fst::script::WeightClass;
|
|
string usage = "Applies an operation to each arc of an FST.\n\n Usage: ";
|
usage += argv[0];
|
usage += " [in.fst [out.fst]]\n";
|
|
std::set_new_handler(FailedNewHandler);
|
SET_FLAGS(usage.c_str(), &argc, &argv, true);
|
if (argc > 3) {
|
ShowUsage();
|
return 1;
|
}
|
|
const string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
|
const string out_name = argc > 2 ? argv[2] : "";
|
|
std::unique_ptr<FstClass> ifst(FstClass::Read(in_name));
|
if (!ifst) return 1;
|
|
s::MapType map_type;
|
if (!s::GetMapType(FLAGS_map_type, &map_type)) {
|
LOG(ERROR) << argv[0] << ": Unknown or unsupported map type "
|
<< FLAGS_map_type;
|
return 1;
|
}
|
|
const auto weight_param =
|
!FLAGS_weight.empty()
|
? WeightClass(ifst->WeightType(), FLAGS_weight)
|
: (FLAGS_map_type == "times" ? WeightClass::One(ifst->WeightType())
|
: WeightClass::Zero(ifst->WeightType()));
|
|
std::unique_ptr<FstClass> ofst(
|
s::Map(*ifst, map_type, FLAGS_delta, FLAGS_power, weight_param));
|
|
return !ofst->Write(out_name);
|
}
|
