Returns the number of bytes remaining for the specified IO operation.
int INKVIONTodoGet (INKVIO
viop)
Gets the number of bytes left to do on the IO operation
described by viop
Number of bytes left to do = (total # bytes
to perform on the IO operation) - (# of bytes that have been
done on the operation)
INKVIONTodoGet is a convenience
function.
The number of bytes left that are associated with the specified IO operation.
INK_ERROR if an error occurs.
INKVIONTodoGet (viop) == INKVIONBytesGet (viop) - INKVIONDoneGet (viop);