1 /* 2 * Copyright (C) 2013, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LATINIME_FORMAT_UTILS_H 18 #define LATINIME_FORMAT_UTILS_H 19 20 #include <stdint.h> 21 22 #include "defines.h" 23 24 namespace latinime { 25 26 /** 27 * Methods to handle binary dictionary format version. 28 */ 29 class FormatUtils { 30 public: 31 enum FORMAT_VERSION { 32 VERSION_2, 33 VERSION_3, 34 UNKNOWN_VERSION 35 }; 36 37 // 32 bit magic number is stored at the beginning of the dictionary header to reject 38 // unsupported or obsolete dictionary formats. 39 static const uint32_t MAGIC_NUMBER; 40 41 static FORMAT_VERSION detectFormatVersion(const uint8_t *const dict, const int dictSize); 42 43 private: 44 DISALLOW_IMPLICIT_CONSTRUCTORS(FormatUtils); 45 46 static const int DICTIONARY_MINIMUM_SIZE; 47 }; 48 } // namespace latinime 49 #endif /* LATINIME_FORMAT_UTILS_H */ 50