50 _nc_scroll_window(WINDOW *win,  in NCURSES_EXPORT()
59     size_t to_copy = (sizeof(NCURSES_CH_T) * (size_t) (win->_maxx + 1));  in NCURSES_EXPORT()
62 		    (void *) win, n, (long) top, (long) bottom));  in NCURSES_EXPORT()
66 	|| bottom > win->_maxy) {  in NCURSES_EXPORT()
82 #define TopLimit(n)    ((n) <= win->_maxy && (n) <= bottom)  in NCURSES_EXPORT()
89 	    memcpy(win->_line[line].text,  in NCURSES_EXPORT()
90 		   win->_line[line + n].text,  in NCURSES_EXPORT()
92 	    if_USE_SCROLL_HINTS(win->_line[line].oldindex =  in NCURSES_EXPORT()
93 				win->_line[line + n].oldindex);  in NCURSES_EXPORT()
97 	    for (j = 0; j <= win->_maxx; j++)  in NCURSES_EXPORT()
98 		win->_line[line].text[j] = blank;  in NCURSES_EXPORT()
99 	    if_USE_SCROLL_HINTS(win->_line[line].oldindex = _NEWINDEX);  in NCURSES_EXPORT()
107 	    memcpy(win->_line[line].text,  in NCURSES_EXPORT()
108 		   win->_line[line + n].text,  in NCURSES_EXPORT()
110 	    if_USE_SCROLL_HINTS(win->_line[line].oldindex =  in NCURSES_EXPORT()
111 				win->_line[line + n].oldindex);  in NCURSES_EXPORT()
114 	    for (j = 0; j <= win->_maxx; j++)  in NCURSES_EXPORT()
115 		win->_line[line].text[j] = blank;  in NCURSES_EXPORT()
116 	    if_USE_SCROLL_HINTS(win->_line[line].oldindex = _NEWINDEX);  in NCURSES_EXPORT()
119     touchline(win, top, bottom - top + 1);  in NCURSES_EXPORT()
122 	if (WINDOW_EXT(win, addch_used) != 0) {  in NCURSES_EXPORT()
123 	    int next = WINDOW_EXT(win, addch_y) + n;  in NCURSES_EXPORT()
124 	    if (next < 0 || next > win->_maxy) {  in NCURSES_EXPORT()
127 		WINDOW_EXT(win, addch_y) = 0;  in NCURSES_EXPORT()
130 				   WINDOW_EXT(win, addch_y),  in NCURSES_EXPORT()
131 				   WINDOW_EXT(win, addch_x)));  in NCURSES_EXPORT()
132 		WINDOW_EXT(win, addch_y) = next;  in NCURSES_EXPORT()
139 wscrl(WINDOW *win, int n)  in wscrl()  argument
141     T((T_CALLED("wscrl(%p,%d)"), (void *) win, n));  in wscrl()
143     if (!win || !win->_scroll) {  in wscrl()
149 	_nc_scroll_window(win, n, win->_regtop, win->_regbottom, win->_nc_bkgd);  in wscrl()
150 	_nc_synchook(win);  in wscrl()