fstreverse-main.cc
1.06 KB
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Reverses the paths in an FST.
#include <cstring>
#include <memory>
#include <string>
#include <fst/flags.h>
#include <fst/script/fst-class.h>
#include <fst/script/reverse.h>
DECLARE_bool(require_superinitial);
int fstreverse_main(int argc, char **argv) {
namespace s = fst::script;
using fst::script::FstClass;
using fst::script::VectorFstClass;
string usage = "Reverses the paths 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;
}
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;
VectorFstClass ofst(ifst->ArcType());
s::Reverse(*ifst, &ofst, FLAGS_require_superinitial);
return !ofst.Write(out_name);
}