usr/src/lib/libcurses/clrtobot.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#ifndef lint
static char sccsid[] = "@(#)clrtobot.c  5.3 (Berkeley) %G%";
#endif /* not lint */

# include       "curses.ext"

/*
 *      This routine erases everything on the window.
 *
 */
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)
                        touchline(win, y, minx, maxx - &win->_y[y][0]);
                startx = 0;
        }
}