internal static int SafeStgOpenStorageOnStream(
Stream s,
int grfMode,
out IStorage ppstgOpen
)
{
Invariant.Assert(s != null, "s cannot be null");
UnsafeNativeCompoundFileMethods.UnsafeNativeIStorage storage;
UnsafeNativeCompoundFileMethods.UnsafeLockBytesOnStream lockByteStream = new UnsafeNativeCompoundFileMethods.UnsafeLockBytesOnStream(s);
int result;
result = UnsafeNativeCompoundFileMethods.StgOpenStorageOnILockBytes(
(UnsafeNativeCompoundFileMethods.UnsafeNativeILockBytes)lockByteStream,
null,
grfMode,
new IntPtr(0), // Pointer to SNB struct, not marshalled, must be null.
0,
out storage);
if (result == SafeNativeCompoundFileConstants.S_OK)
{
ppstgOpen = new SafeIStorageImplementation(storage);
}
else
{
ppstgOpen = null;
lockByteStream.Dispose();
}
return(result);
}