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 <cstdint> 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 // These MUST have the same values as the relevant constants in FormatSpec.java. 33 VERSION_2 = 2, 34 VERSION_4_ONLY_FOR_TESTING = 399, 35 VERSION_4 = 402, 36 VERSION_4_DEV = 403, 37 UNKNOWN_VERSION = -1 38 }; 39 40 // 32 bit magic number is stored at the beginning of the dictionary header to reject 41 // unsupported or obsolete dictionary formats. 42 static const uint32_t MAGIC_NUMBER; 43 44 static FORMAT_VERSION getFormatVersion(const int formatVersion); 45 static FORMAT_VERSION detectFormatVersion(const uint8_t *const dict, const int dictSize); 46 47 private: 48 DISALLOW_IMPLICIT_CONSTRUCTORS(FormatUtils); 49 50 static const int DICTIONARY_MINIMUM_SIZE; 51 }; 52 } // namespace latinime 53 #endif /* LATINIME_FORMAT_UTILS_H */ 54
