58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
// IStream.h
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#ifndef __ISTREAM_H
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#define __ISTREAM_H
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#include "../Common/MyUnknown.h"
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#include "../Common/Types.h"
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#include "IDecl.h"
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#define STREAM_INTERFACE_SUB(i, base, x) DECL_INTERFACE_SUB(i, base, 3, x)
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#define STREAM_INTERFACE(i, x) STREAM_INTERFACE_SUB(i, IUnknown, x)
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STREAM_INTERFACE(ISequentialInStream, 0x01)
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{
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STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) PURE;
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/*
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Out: if size != 0, return_value = S_OK and (*processedSize == 0),
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then there are no more bytes in stream.
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if (size > 0) && there are bytes in stream,
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this function must read at least 1 byte.
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This function is allowed to read less than number of remaining bytes in stream.
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You must call Read function in loop, if you need exact amount of data
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*/
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};
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STREAM_INTERFACE(ISequentialOutStream, 0x02)
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{
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STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) PURE;
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/*
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if (size > 0) this function must write at least 1 byte.
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This function is allowed to write less than "size".
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You must call Write function in loop, if you need to write exact amount of data
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*/
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};
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STREAM_INTERFACE_SUB(IInStream, ISequentialInStream, 0x03)
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{
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STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE;
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};
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STREAM_INTERFACE_SUB(IOutStream, ISequentialOutStream, 0x04)
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{
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STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE;
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STDMETHOD(SetSize)(Int64 newSize) PURE;
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};
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STREAM_INTERFACE(IStreamGetSize, 0x06)
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{
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STDMETHOD(GetSize)(UInt64 *size) PURE;
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};
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STREAM_INTERFACE(IOutStreamFlush, 0x07)
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{
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STDMETHOD(Flush)() PURE;
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};
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#endif
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