misc/libphysfs/lzma/CPP/7zip/IStream.h
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
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permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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// 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