BSD 4_1c_2 release

[unix-history] / usr / src / usr.lib / libcurses / clrtobot.c

# include       "curses.ext"

/*
*      This routine erases everything on the window.
*
* 1/26/81 (Berkeley) @(#)clrtobot.c    1.1
*/
wclrtobot(win)
reg WINDOW      *win; {

       reg int         y;
       reg char        *sp, *end, *maxx;
       reg int         startx, minx;

       startx = win->_curx;
       for (y = win->_cury; y < win->_maxy; y++) {
               minx = _NOCHANGE;
               end = &win->_y[y][win->_maxx];
               for (sp = &win->_y[y][startx]; sp < end; sp++)
                       if (*sp != ' ') {
                               maxx = sp;
                               if (minx == _NOCHANGE)
                                       minx = sp - win->_y[y];
                               *sp = ' ';
                       }
               if (minx != _NOCHANGE) {
                       if (win->_firstch[y] > minx
                            || win->_firstch[y] == _NOCHANGE)
                               win->_firstch[y] = minx;
                       if (win->_lastch[y] < maxx - win->_y[y])
                               win->_lastch[y] = maxx - win->_y[y];
               }
               startx = 0;
       }
       win->_curx = win->_cury = 0;
}