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tools/openfst-1.6.7/src/bin/fstcompile-main.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Creates binary FSTs from simple text format used by AT&T.
#include <cstring>
#include <fstream>
#include <istream>
#include <memory>
#include <string>
#include <fst/flags.h>
#include <fst/log.h>
#include <fst/script/compile.h>
DECLARE_bool(acceptor);
DECLARE_string(arc_type);
DECLARE_string(fst_type);
DECLARE_string(isymbols);
DECLARE_string(osymbols);
DECLARE_string(ssymbols);
DECLARE_bool(keep_isymbols);
DECLARE_bool(keep_osymbols);
DECLARE_bool(keep_state_numbering);
DECLARE_bool(allow_negative_labels);
int fstcompile_main(int argc, char **argv) {
namespace s = fst::script;
using fst::SymbolTable;
using fst::SymbolTableTextOptions;
string usage = "Creates binary FSTs from simple text format.
Usage: ";
usage += argv[0];
usage += " [text.fst [binary.fst]]
";
std::set_new_handler(FailedNewHandler);
SET_FLAGS(usage.c_str(), &argc, &argv, true);
if (argc > 3) {
ShowUsage();
return 1;
}
string source = "standard input";
std::ifstream fstrm;
if (argc > 1 && strcmp(argv[1], "-") != 0) {
fstrm.open(argv[1]);
if (!fstrm) {
LOG(ERROR) << argv[0] << ": Open failed, file = " << argv[1];
return 1;
}
source = argv[1];
}
std::istream &istrm = fstrm.is_open() ? fstrm : std::cin;
const SymbolTableTextOptions opts(FLAGS_allow_negative_labels);
std::unique_ptr<const SymbolTable> isyms;
if (!FLAGS_isymbols.empty()) {
isyms.reset(SymbolTable::ReadText(FLAGS_isymbols, opts));
if (!isyms) return 1;
}
std::unique_ptr<const SymbolTable> osyms;
if (!FLAGS_osymbols.empty()) {
osyms.reset(SymbolTable::ReadText(FLAGS_osymbols, opts));
if (!osyms) return 1;
}
std::unique_ptr<const SymbolTable> ssyms;
if (!FLAGS_ssymbols.empty()) {
ssyms.reset(SymbolTable::ReadText(FLAGS_ssymbols));
if (!ssyms) return 1;
}
const string dest = argc > 2 ? argv[2] : "";
s::CompileFst(istrm, source, dest, FLAGS_fst_type, FLAGS_arc_type,
isyms.get(), osyms.get(), ssyms.get(), FLAGS_acceptor,
FLAGS_keep_isymbols, FLAGS_keep_osymbols,
FLAGS_keep_state_numbering, FLAGS_allow_negative_labels);
return 0;
}
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