sttable.cc

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// Copyright 2005-2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the 'License');
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an 'AS IS' BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.

#include <fst/extensions/far/sttable.h>

#include <cstdint>
#include <string>

#include <fstream>
#include <fst/util.h>
#include <string_view>

namespace fst {

bool IsSTTable(std::string_view source) {
  std::ifstream strm((std::string(source)));
  if (!strm.good()) return false;

  int32_t magic_number = 0;
  ReadType(strm, &magic_number);
  return magic_number == kSTTableMagicNumber;
}

}  // namespace fst