9.34

CPP/7zip/IStream.h

@@ -3,8 +3,8 @@
 #ifndef __ISTREAM_H
 #define __ISTREAM_H
 
+#include "../Common/MyTypes.h"
 #include "../Common/MyUnknown.h"
-#include "../Common/Types.h"
 
 #include "IDecl.h"
 
@@ -21,6 +21,9 @@ STREAM_INTERFACE(ISequentialInStream, 0x01)
   this function must read at least 1 byte.
   This function is allowed to read less than number of remaining bytes in stream.
   You must call Read function in loop, if you need exact amount of data
+
+  If seek pointer before Read() function call was changed to position past the
+  end of stream, the Read() function returns S_OK and *processedSize is set to 0.
   */
 };
 
@@ -34,6 +37,20 @@ STREAM_INTERFACE(ISequentialOutStream, 0x02)
   */
 };
 
+
+#define HRESULT_WIN32_ERROR_NEGATIVE_SEEK __HRESULT_FROM_WIN32(ERROR_NEGATIVE_SEEK)
+
+/*  Seek() Function
+  If you seek before the beginning of the stream, Seek() function returns error code:
+      Recommended error code is __HRESULT_FROM_WIN32(ERROR_NEGATIVE_SEEK).
+      or STG_E_INVALIDFUNCTION
+      
+  It is allowed to seek past the end of the stream.
+
+
+  if Seek() returns error, then the value of *newPosition is undefined.
+*/
+
 STREAM_INTERFACE_SUB(IInStream, ISequentialInStream, 0x03)
 {
   STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE;
@@ -55,4 +72,28 @@ STREAM_INTERFACE(IOutStreamFlush, 0x07)
   STDMETHOD(Flush)() PURE;
 };
 
+
+STREAM_INTERFACE(IStreamGetProps, 0x08)
+{
+  STDMETHOD(GetProps)(UInt64 *size, FILETIME *cTime, FILETIME *aTime, FILETIME *mTime, UInt32 *attrib) PURE;
+};
+
+struct CStreamFileProps
+{
+  UInt64 Size;
+  UInt64 VolID;
+  UInt64 FileID_Low;
+  UInt64 FileID_High;
+  UInt32 NumLinks;
+  UInt32 Attrib;
+  FILETIME CTime;
+  FILETIME ATime;
+  FILETIME MTime;
+};
+
+STREAM_INTERFACE(IStreamGetProps2, 0x09)
+{
+  STDMETHOD(GetProps2)(CStreamFileProps *props) PURE;
+};
+
 #endif