// See www.openfst.org for extensive documentation on this weighted
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// finite-state transducer library.
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//
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// Removes useless (inaccessible or non-coaccessible) states and arcs from an
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// FST.
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#include <cstring>
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#include <memory>
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#include <string>
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#include <fst/flags.h>
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#include <fst/script/connect.h>
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int fstconnect_main(int argc, char **argv) {
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namespace s = fst::script;
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using fst::script::FstClass;
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using fst::script::MutableFstClass;
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string usage = "Removes useless states and arcs from an FST.\n\n Usage: ";
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usage += argv[0];
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usage += " [in.fst [out.fst]]\n";
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std::set_new_handler(FailedNewHandler);
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SET_FLAGS(usage.c_str(), &argc, &argv, true);
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if (argc > 3) {
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ShowUsage();
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return 1;
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}
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const string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
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const string out_name = argc > 2 ? argv[2] : "";
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std::unique_ptr<MutableFstClass> fst(MutableFstClass::Read(in_name, true));
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if (!fst) return 1;
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s::Connect(fst.get());
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return !fst->Write(out_name);
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}
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