1 // IStream.h 2 3 #ifndef __ISTREAM_H 4 #define __ISTREAM_H 5 6 #include "../Common/MyUnknown.h" 7 #include "../Common/Types.h" 8 9 #include "IDecl.h" 10 11 #define STREAM_INTERFACE_SUB(i, base, x) DECL_INTERFACE_SUB(i, base, 3, x) 12 #define STREAM_INTERFACE(i, x) STREAM_INTERFACE_SUB(i, IUnknown, x) 13 14 STREAM_INTERFACE(ISequentialInStream, 0x01) 15 { 16 STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) PURE; 17 /* 18 Out: if size != 0, return_value = S_OK and (*processedSize == 0), 19 then there are no more bytes in stream. 20 if (size > 0) && there are bytes in stream, 21 this function must read at least 1 byte. 22 This function is allowed to read less than number of remaining bytes in stream. 23 You must call Read function in loop, if you need exact amount of data 24 */ 25 }; 26 27 STREAM_INTERFACE(ISequentialOutStream, 0x02) 28 { 29 STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) PURE; 30 /* 31 if (size > 0) this function must write at least 1 byte. 32 This function is allowed to write less than "size". 33 You must call Write function in loop, if you need to write exact amount of data 34 */ 35 }; 36 37 STREAM_INTERFACE_SUB(IInStream, ISequentialInStream, 0x03) 38 { 39 STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE; 40 }; 41 42 STREAM_INTERFACE_SUB(IOutStream, ISequentialOutStream, 0x04) 43 { 44 STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE; 45 STDMETHOD(SetSize)(UInt64 newSize) PURE; 46 }; 47 48 STREAM_INTERFACE(IStreamGetSize, 0x06) 49 { 50 STDMETHOD(GetSize)(UInt64 *size) PURE; 51 }; 52 53 STREAM_INTERFACE(IOutStreamFlush, 0x07) 54 { 55 STDMETHOD(Flush)() PURE; 56 }; 57 58 #endif 59
