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

# include       "curses.ext"

/*
*      This routine performs an insert-line on the window, leaving
* (_cury,_curx) unchanged.
*
* %G% (Berkeley) @(#)insertln.c        1.4
*/
winsertln(win)
reg WINDOW      *win; {

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

       temp = win->_y[win->_maxy-1];
       win->_firstch[win->_cury] = 0;
       win->_lastch[win->_cury] = win->_maxx - 1;
       for (y = win->_maxy - 1; y > win->_cury; --y) {
               win->_y[y] = win->_y[y-1];
               win->_firstch[y] = 0;
               win->_lastch[y] = win->_maxx - 1;
       }
       for (end = &temp[win->_maxx]; temp < end; )
               *temp++ = ' ';
       win->_y[win->_cury] = temp - win->_maxx;
       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;
}