1 /* 2 * Copyright 2009,2011, Haiku, Inc. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _PACKAGE__HPKG__DATA_READER_H_ 6 #define _PACKAGE__HPKG__DATA_READER_H_ 7 8 9 #include <SupportDefs.h> 10 11 12 namespace BPackageKit { 13 14 namespace BHPKG { 15 16 17 class BDataReader { 18 public: 19 virtual ~BDataReader(); 20 21 virtual status_t ReadData(off_t offset, void* buffer, 22 size_t size) = 0; 23 }; 24 25 26 class BFDDataReader : public BDataReader { 27 public: 28 BFDDataReader(int fd); 29 30 virtual status_t ReadData(off_t offset, void* buffer, 31 size_t size); 32 33 private: 34 int fFD; 35 }; 36 37 38 class BAttributeDataReader : public BDataReader { 39 public: 40 BAttributeDataReader(int fd, 41 const char* attribute, uint32 type); 42 43 virtual status_t ReadData(off_t offset, void* buffer, 44 size_t size); 45 46 private: 47 int fFD; 48 uint32 fType; 49 const char* fAttribute; 50 }; 51 52 53 class BBufferDataReader : public BDataReader { 54 public: 55 BBufferDataReader(const void* data, size_t size); 56 57 virtual status_t ReadData(off_t offset, void* buffer, 58 size_t size); 59 60 private: 61 const void* fData; 62 size_t fSize; 63 }; 64 65 66 } // namespace BHPKG 67 68 } // namespace BPackageKit 69 70 71 #endif // _PACKAGE__HPKG__DATA_READER_H_ 72