fstproject-main.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Projects a transduction onto its input or output language.
#include <cstring>
#include <memory>
#include <string>
#include <fst/flags.h>
#include <fst/script/getters.h>
#include <fst/script/project.h>
DECLARE_bool(project_output);
int fstproject_main(int argc, char **argv) {
namespace s = fst::script;
using fst::script::MutableFstClass;
string usage =
"Projects a transduction onto its input"
" or output language.\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<MutableFstClass> fst(MutableFstClass::Read(in_name, true));
if (!fst) return 1;
s::Project(fst.get(), s::GetProjectType(FLAGS_project_output));
return !fst->Write(out_name);
}