lib/libcurses/insch.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)insch.c     5.4 (Berkeley) 6/1/90";
#endif /* not lint */

# include       "curses.ext"

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

        reg chtype      *temp1, *temp2;
        reg chtype      *end;

        end = &win->_y[win->_cury][win->_curx];
        temp1 = &win->_y[win->_cury][win->_maxx - 1];
        temp2 = temp1 - 1;
        while (temp1 > end)
                *temp1-- = *temp2--;
        *temp1 = (unsigned char) c;
        touchline(win, win->_cury, win->_curx, win->_maxx - 1);
        if (win->_cury == LINES - 1 && win->_y[LINES-1][COLS-1] != ' ')
                if (win->_scroll) {
                        wrefresh(win);
                        scroll(win);
                        win->_cury--;
                }
                else
                        return ERR;
        return OK;
}