1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef FILE_CACHE_H_ 17 #define FILE_CACHE_H_ 18 19 #include <algorithm> 20 #include <climits> 21 #include <cstdint> 22 #include <fstream> 23 #include <string> 24 #include <sys/stat.h> 25 #include <unistd.h> 26 #include <unordered_map> 27 28 #include "logging.h" 29 #include "securec.h" 30 31 class FileCache { 32 public: 33 FileCache(const std::string &path); 34 ~FileCache(); 35 36 bool Open(const std::string& name); 37 38 long Write(char* bytes, int32_t len); 39 40 long Read(char* buff); 41 42 bool Close(); 43 44 private: 45 std::string path_; 46 FILE* fp_; 47 std::unordered_map<uint64_t, uint64_t> size_; 48 }; 49 50 #endif // !FILE_CACHE_H_