1 /* 2 * Copyright (C) 2009 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 ART_RUNTIME_BASE_UNIX_FILE_STRING_FILE_H_ 18 #define ART_RUNTIME_BASE_UNIX_FILE_STRING_FILE_H_ 19 20 #include <stdint.h> 21 22 #include <string> 23 24 #include "base/macros.h" 25 #include "base/stringpiece.h" 26 #include "base/unix_file/random_access_file.h" 27 28 namespace unix_file { 29 30 // A RandomAccessFile implementation backed by a std::string. (That is, all data is 31 // kept in memory.) 32 // 33 // Not thread safe. 34 class StringFile : public RandomAccessFile { 35 public: 36 StringFile(); 37 virtual ~StringFile(); 38 39 // RandomAccessFile API. 40 virtual int Close(); 41 virtual int Flush(); 42 virtual int64_t Read(char* buf, int64_t byte_count, int64_t offset) const; 43 virtual int SetLength(int64_t new_length); 44 virtual int64_t GetLength() const; 45 virtual int64_t Write(const char* buf, int64_t byte_count, int64_t offset); 46 47 // Bonus API. 48 void Assign(const art::StringPiece& new_data); 49 const art::StringPiece ToStringPiece() const; 50 51 private: 52 std::string data_; 53 54 DISALLOW_COPY_AND_ASSIGN(StringFile); 55 }; 56 57 } // namespace unix_file 58 59 #endif // ART_RUNTIME_BASE_UNIX_FILE_STRING_FILE_H_ 60
