usr/src/lib/libcurses/insertln.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)insertln.c  5.1 (Berkeley) %G%";
#endif not lint

# include       "curses.ext"

/*
 *      This routine performs an insert-line on the window, leaving
 * (_cury,_curx) unchanged.
 *
 */
winsertln(win)
reg WINDOW      *win; {

        reg char        *temp;
        reg int         y;
        reg char        *end;
        reg int         x;

#ifdef  DEBUG
        fprintf(outf, "INSERTLN(%0.2o)\n", win);
#endif
        if (win->_orig == NULL)
                temp = win->_y[win->_maxy - 1];
        for (y = win->_maxy - 1; y > win->_cury; --y) {
                if (win->_orig == NULL)
                        win->_y[y] = win->_y[y - 1];
                else
                        bcopy(win->_y[y - 1], win->_y[y], win->_maxx);
                touchline(win, y, 0, win->_maxx - 1);
        }
        if (win->_orig == NULL)
                win->_y[y] = temp;
        else
                temp = win->_y[y];
        for (end = &temp[win->_maxx]; temp < end; )
                *temp++ = ' ';
        touchline(win, y, 0, win->_maxx - 1);
        if (win->_orig == NULL)
                _id_subwins(win);
}