farextract.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Extracts component FSTs from an finite-state archive.
#include <string>
#include <vector>
#include <fst/flags.h>
#include <fst/extensions/far/farscript.h>
#include <fst/extensions/far/getters.h>
DEFINE_string(filename_prefix, "", "Prefix to append to filenames");
DEFINE_string(filename_suffix, "", "Suffix to append to filenames");
DEFINE_int32(generate_filenames, 0,
"Generate N digit numeric filenames (def: use keys)");
DEFINE_string(keys, "",
"Extract set of keys separated by comma (default) "
"including ranges delimited by dash (default)");
DEFINE_string(key_separator, ",", "Separator for individual keys");
DEFINE_string(range_delimiter, "-", "Delimiter for ranges of keys");
int main(int argc, char **argv) {
namespace s = fst::script;
string usage = "Extracts FSTs from a finite-state archive.\n\n Usage:";
usage += argv[0];
usage += " [in1.far in2.far...]\n";
std::set_new_handler(FailedNewHandler);
SET_FLAGS(usage.c_str(), &argc, &argv, true);
s::ExpandArgs(argc, argv, &argc, &argv);
std::vector<string> in_fnames;
for (int i = 1; i < argc; ++i) in_fnames.push_back(argv[i]);
if (in_fnames.empty()) in_fnames.push_back("");
const auto arc_type = s::LoadArcTypeFromFar(in_fnames[0]);
if (arc_type.empty()) return 1;
s::FarExtract(in_fnames, arc_type, FLAGS_generate_filenames, FLAGS_keys,
FLAGS_key_separator, FLAGS_range_delimiter,
FLAGS_filename_prefix, FLAGS_filename_suffix);
return 0;
}