27 Input/output library [input.output]

27.6.3.2.2 Buffer management and positioning [streambuf.buffer]

basic_streambuf<char_type,traits>* pubsetbuf(char_type* s, streamsize n);

pos_type pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which = ios_base::in | ios_base::out);

pos_type pubseekpos(pos_type sp, ios_base::openmode which = ios_base::in | ios_base::out);

int pubsync();