Use this function to get the size of the data stream in an SDL_IOStream.
\param context the SDL_IOStream to get the size of the data stream from.
the size of the data stream in the SDL_IOStream on success or a negative error code on failure; call SDL_GetError() for more information.
Threadsafety: This function is not thread safe.
See Implementation
Use this function to get the size of the data stream in an SDL_IOStream.
\param context the SDL_IOStream to get the size of the data stream from.