setbuf
streambuf* builtinbuf::setbuf(char *buf, int n)
streambuf* filebuf::setbuf(char* p, int len)
streambuf* parsebuf::setbuf(char*, int)
streambuf* streambuf::setbuf(char* p, int len)
setbuf (fp, buf)
void setbuf() {}
void setbuf() {}