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tools/openfst-1.6.7/src/extensions/compress/fstcompress.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Compresses/decompresses an FST.
#include <memory>
#include <string>
#include <fst/extensions/compress/compress-script.h>
#include <fst/flags.h>
#include <fst/log.h>
#include <fst/util.h>
#include <fst/script/fst-class.h>
DEFINE_string(arc_type, "standard", "Output arc type");
DEFINE_bool(decode, false, "Decode");
DEFINE_bool(gzip, false,
"Applies gzip compression after LZA compression and "
"gzip decompression before LZA decompression "
"(recommended)"
"");
int main(int argc, char **argv) {
namespace s = fst::script;
using s::FstClass;
using s::VectorFstClass;
string usage = "Compresses/decompresses an FST.
Usage: ";
usage += argv[0];
usage += " [in.fst [out.fstz]]
";
usage += " --decode [in.fstz [out.fst]]
";
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] : "";
if (FLAGS_decode == false) {
std::unique_ptr<FstClass> ifst(FstClass::Read(in_name));
if (!ifst) return 1;
s::Compress(*ifst, out_name, FLAGS_gzip);
} else {
VectorFstClass ofst(FLAGS_arc_type);
s::Decompress(in_name, &ofst, FLAGS_gzip);
ofst.Write(out_name);
}
return 0;
}
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