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

# include       "curses.ext"

/*
*      This routine clears up to the end of line
*
* %G% (Berkeley) @(#)clrtoeol.c        1.3
*/
wclrtoeol(win)
reg WINDOW      *win; {

       reg char        *sp, *end;
       reg int         y, x;
       reg char        *maxx;
       reg int         minx;

       y = win->_cury;
       x = win->_curx;
       end = &win->_y[y][win->_maxx];
       minx = _NOCHANGE;
       maxx = &win->_y[y][x];
       for (sp = maxx; sp < end; sp++)
               if (*sp != ' ') {
                       maxx = sp;
                       if (minx == _NOCHANGE)
                               minx = sp - win->_y[y];
                       *sp = ' ';
               }
       /*
        * update firstch and lastch for the line
        */
# ifdef DEBUG
       fprintf(outf, "CLRTOEOL: minx = %d, maxx = %d, firstch = %d, lastch = %d\n", minx, maxx - win->_y[y], win->_firstch[y], win->_lastch[y]);
# endif
       if (minx != _NOCHANGE) {
               if (win->_firstch[y] > minx || win->_firstch[y] == _NOCHANGE)
                       win->_firstch[y] = minx;
               if (win->_lastch[y] < maxx - win->_y[y])
                       win->_lastch[y] = maxx - win->_y[y];
       }
}