fstpush-main.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Pushes weights and/or output labels in an FST toward the initial or final
// states.
#include <cstring>
#include <memory>
#include <string>
#include <fst/flags.h>
#include <fst/script/getters.h>
#include <fst/script/push.h>
DECLARE_double(delta);
DECLARE_bool(push_weights);
DECLARE_bool(push_labels);
DECLARE_bool(remove_total_weight);
DECLARE_bool(remove_common_affix);
DECLARE_bool(to_final);
int fstpush_main(int argc, char **argv) {
namespace s = fst::script;
using fst::script::FstClass;
using fst::script::VectorFstClass;
string usage = "Pushes weights and/or olabels in 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;
}
string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
string out_name = argc > 2 ? argv[2] : "";
std::unique_ptr<FstClass> ifst(FstClass::Read(in_name));
if (!ifst) return 1;
const auto flags =
s::GetPushFlags(FLAGS_push_weights, FLAGS_push_labels,
FLAGS_remove_total_weight, FLAGS_remove_common_affix);
VectorFstClass ofst(ifst->ArcType());
s::Push(*ifst, &ofst, flags, s::GetReweightType(FLAGS_to_final),
FLAGS_delta);
return !ofst.Write(out_name);
}