// 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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// Compiles a set of stings as FSTs and stores them in a finite-state archive.
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#include <string>
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#include <vector>
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#include <fst/flags.h>
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#include <fst/extensions/far/farscript.h>
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#include <fst/extensions/far/getters.h>
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#include <fstream>
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DEFINE_string(key_prefix, "", "Prefix to append to keys");
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DEFINE_string(key_suffix, "", "Suffix to append to keys");
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DEFINE_int32(generate_keys, 0,
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"Generate N digit numeric keys (def: use file basenames)");
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DEFINE_string(far_type, "default",
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"FAR file format type: one of: \"default\", \"fst\", "
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"\"stlist\", \"sttable\"");
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DEFINE_bool(allow_negative_labels, false,
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"Allow negative labels (not recommended; may cause conflicts)");
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DEFINE_string(arc_type, "standard", "Output arc type");
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DEFINE_string(entry_type, "line",
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"Entry type: one of : "
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"\"file\" (one FST per file), \"line\" (one FST per line)");
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DEFINE_string(fst_type, "vector", "Output FST type");
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DEFINE_string(token_type, "symbol",
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"Token type: one of : "
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"\"symbol\", \"byte\", \"utf8\"");
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DEFINE_string(symbols, "", "Label symbol table");
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DEFINE_string(unknown_symbol, "", "");
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DEFINE_bool(file_list_input, false,
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"Each input file contains a list of files to be processed");
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DEFINE_bool(keep_symbols, false, "Store symbol table in the FAR file");
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DEFINE_bool(initial_symbols, true,
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"When keep_symbols is true, stores symbol table only for the first"
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" FST in archive.");
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int main(int argc, char **argv) {
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namespace s = fst::script;
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string usage = "Compiles a set of strings as FSTs and stores them in";
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usage += " a finite-state archive.\n\n Usage:";
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usage += argv[0];
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usage += " [in1.txt [[in2.txt ...] out.far]]\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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s::ExpandArgs(argc, argv, &argc, &argv);
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std::vector<string> in_fnames;
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if (FLAGS_file_list_input) {
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for (int i = 1; i < argc - 1; ++i) {
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std::ifstream istrm(argv[i]);
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string str;
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while (getline(istrm, str)) in_fnames.push_back(str);
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}
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} else {
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for (int i = 1; i < argc - 1; ++i)
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in_fnames.push_back(argv[i]);
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}
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if (in_fnames.empty()) {
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in_fnames.push_back(argc == 2 && strcmp(argv[1], "-") != 0 ? argv[1] : "");
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}
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string out_fname =
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argc > 2 && strcmp(argv[argc - 1], "-") != 0 ? argv[argc - 1] : "";
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fst::FarEntryType entry_type;
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if (!s::GetFarEntryType(FLAGS_entry_type, &entry_type)) {
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LOG(ERROR) << "Unknown or unsupported FAR entry type: " << FLAGS_entry_type;
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return 1;
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}
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fst::FarTokenType token_type;
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if (!s::GetFarTokenType(FLAGS_token_type, &token_type)) {
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LOG(ERROR) << "Unkonwn or unsupported FAR token type: " << FLAGS_token_type;
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return 1;
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}
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const auto far_type = s::GetFarType(FLAGS_far_type);
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s::FarCompileStrings(in_fnames, out_fname, FLAGS_arc_type, FLAGS_fst_type,
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far_type, FLAGS_generate_keys, entry_type, token_type,
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FLAGS_symbols, FLAGS_unknown_symbol, FLAGS_keep_symbols,
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FLAGS_initial_symbols, FLAGS_allow_negative_labels,
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FLAGS_key_prefix, FLAGS_key_suffix);
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return 0;
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}
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