11 _fraddbox(Frame *f, int bn, int n)	/* add n boxes after bn, shift the rest up,  in _fraddbox()
26 _frclosebox(Frame *f, int n0, int n1)	/* inclusive */  in _frclosebox()
39 _frdelbox(Frame *f, int n0, int n1)	/* inclusive */  in _frdelbox()
48 _frfreebox(Frame *f, int n0, int n1)	/* inclusive */  in _frfreebox()
63 _frgrowbox(Frame *f, int delta)  in _frgrowbox()
73 dupbox(Frame *f, int bn)  in dupbox()
106 truncatebox(Frame *f, Frbox *b, int n)	/* drop last n chars; no allocation done */  in truncatebox()
117 chopbox(Frame *f, Frbox *b, int n)	/* drop first n chars; no allocation done */  in chopbox()
130 _frsplitbox(Frame *f, int bn, int n)  in _frsplitbox()
138 _frmergebox(Frame *f, int bn)		/* merge bn and bn+1 */  in _frmergebox()
151 _frfindbox(Frame *f, int bn, ulong p, ulong q)	/* find box containing q and put q on a box boundary…  in _frfindbox()