1 /* 2 * Copyright 2012, 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 // Defines utility allowing files for bitcode input wrapping. 18 19 #ifndef FILE_WRAPPER_INPUT_H__ 20 #define FILE_WRAPPER_INPUT_H__ 21 22 #include <stdio.h> 23 24 #include "bcinfo/Wrap/support_macros.h" 25 #include "bcinfo/Wrap/wrapper_input.h" 26 27 // Define a class to wrap named files. 28 class FileWrapperInput : public WrapperInput { 29 public: 30 FileWrapperInput(const char* _name); 31 ~FileWrapperInput(); 32 // Tries to read the requested number of bytes into the buffer. Returns the 33 // actual number of bytes read. 34 virtual size_t Read(uint8_t* buffer, size_t wanted); 35 // Returns true if at end of file. Note: May return false 36 // until Read is called, and returns 0. 37 virtual bool AtEof(); 38 // Returns the size of the file (in bytes). 39 virtual off_t Size(); 40 // Moves to the given offset within the file. Returns 41 // false if unable to move to that position. 42 virtual bool Seek(uint32_t pos); 43 private: 44 // The name of the file. 45 const char* _name; 46 // True once eof has been encountered. 47 bool _at_eof; 48 // True if size has been computed. 49 bool _size_found; 50 // The size of the file. 51 off_t _size; 52 // The corresponding (opened) file. 53 FILE* _file; 54 private: 55 DISALLOW_CLASS_COPY_AND_ASSIGN(FileWrapperInput); 56 }; 57 58 #endif // FILE_WRAPPER_INPUT_H__ 59