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