67 class ostream; class streambuf;  variable
87     streambuf *_strbuf;
229     streambuf* rdbuf() const { return _strbuf; }  in rdbuf()
230     streambuf* rdbuf(streambuf *_s) {  in rdbuf()
231       streambuf *_old = _strbuf; _strbuf = _s; clear (); return _old; }  in rdbuf()
257     inline ios(streambuf* sb = 0, ostream* tie_to = 0);
259     inline void init(streambuf* sb, ostream* tie = 0);
277     friend class streambuf;  variable
280     streammarker(streambuf *sb);
287 struct streambuf : public _IO_FILE { // protected??  struct
294     static streambuf* _list_all; /* List of open streambufs. */  argument
346     streambuf(int flags=0);  argument
350     virtual ~streambuf();
367     virtual streambuf* setbuf(char* p, int len);
425 class filebuf : public streambuf {
447     virtual streambuf* setbuf(char* p, int len);
469 inline void ios::init(streambuf* sb, ostream* tie_to) {  in init()
479 inline ios::ios(streambuf* sb, ostream* tie_to) { init(sb, tie_to); }  in ios()