Determine the current read/write offset in an SDL_IOStream data stream.
SDL_TellIO is actually a wrapper function that calls the SDL_IOStream's seek method, with an offset of 0 bytes from SDL_IO_SEEK_CUR, to simplify application development.
an SDL_IOStream data stream object from which to get the current offset.
The current offset in the stream, or -1 if the information can not be determined.
Threadsafety: This function is not thread safe.
SDL_SeekIO
See Implementation
Determine the current read/write offset in an SDL_IOStream data stream.
SDL_TellIO is actually a wrapper function that calls the SDL_IOStream's seek method, with an offset of 0 bytes from SDL_IO_SEEK_CUR, to simplify application development.