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

/*
* Copyright (c) 1981 Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)insch.c     5.4 (Berkeley) %G%";
#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 char        *temp1, *temp2;
       reg char        *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 = 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;
}