michael@0: // IStream.h
michael@0: 
michael@0: #ifndef __ISTREAM_H
michael@0: #define __ISTREAM_H
michael@0: 
michael@0: #include "../Common/MyUnknown.h"
michael@0: #include "../Common/Types.h"
michael@0: 
michael@0: // "23170F69-40C1-278A-0000-000300xx0000"
michael@0: 
michael@0: #define STREAM_INTERFACE_SUB(i, b, x) \
michael@0: DEFINE_GUID(IID_ ## i, \
michael@0: 0x23170F69, 0x40C1, 0x278A, 0x00, 0x00, 0x00, 0x03, 0x00, x, 0x00, 0x00); \
michael@0: struct i: public b
michael@0: 
michael@0: #define STREAM_INTERFACE(i, x) STREAM_INTERFACE_SUB(i, IUnknown, x)
michael@0: 
michael@0: STREAM_INTERFACE(ISequentialInStream, 0x01)
michael@0: {
michael@0:   STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) PURE;
michael@0:   /*
michael@0:   Out: if size != 0, return_value = S_OK and (*processedSize == 0),
michael@0:     then there are no more bytes in stream.
michael@0:   if (size > 0) && there are bytes in stream, 
michael@0:   this function must read at least 1 byte.
michael@0:   This function is allowed to read less than number of remaining bytes in stream.
michael@0:   You must call Read function in loop, if you need exact amount of data
michael@0:   */
michael@0: };
michael@0: 
michael@0: STREAM_INTERFACE(ISequentialOutStream, 0x02)
michael@0: {
michael@0:   STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) PURE;
michael@0:   /*
michael@0:   if (size > 0) this function must write at least 1 byte.
michael@0:   This function is allowed to write less than "size".
michael@0:   You must call Write function in loop, if you need to write exact amount of data
michael@0:   */
michael@0: };
michael@0: 
michael@0: STREAM_INTERFACE_SUB(IInStream, ISequentialInStream, 0x03)
michael@0: {
michael@0:   STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE;
michael@0: };
michael@0: 
michael@0: STREAM_INTERFACE_SUB(IOutStream, ISequentialOutStream, 0x04)
michael@0: {
michael@0:   STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE;
michael@0:   STDMETHOD(SetSize)(Int64 newSize) PURE;
michael@0: };
michael@0: 
michael@0: STREAM_INTERFACE(IStreamGetSize, 0x06)
michael@0: {
michael@0:   STDMETHOD(GetSize)(UInt64 *size) PURE;
michael@0: };
michael@0: 
michael@0: STREAM_INTERFACE(IOutStreamFlush, 0x07)
michael@0: {
michael@0:   STDMETHOD(Flush)() PURE;
michael@0: };
michael@0: 
michael@0: #endif