release/src/router/libncurses/ncurses/base/lib_clreol.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2001,2009 Free Software Foundation, Inc.              *
   3  *                                                                          *
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   5  * copy of this software and associated documentation files (the            *
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  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  ****************************************************************************/
  33
  34 /*
  35 **      lib_clreol.c
  36 **
  37 **      The routine wclrtoeol().
  38 **
  39 */
  40
  41 #include <curses.priv.h>
  42
  43 MODULE_ID("$Id: lib_clreol.c,v 1.22 2009/10/24 22:33:06 tom Exp $")
  44
  45 NCURSES_EXPORT(int)
  46 wclrtoeol(WINDOW *win)
  47 {
  48     int code = ERR;
  49
  50     T((T_CALLED("wclrtoeol(%p)"), (void *) win));
  51
  52     if (win) {
  53         NCURSES_CH_T blank;
  54         NCURSES_CH_T *ptr, *end;
  55         struct ldat *line;
  56         NCURSES_SIZE_T y = win->_cury;
  57         NCURSES_SIZE_T x = win->_curx;
  58
  59         /*
  60          * If we have just wrapped the cursor, the clear applies to the
  61          * new line, unless we are at the lower right corner.
  62          */
  63         if ((win->_flags & _WRAPPED) != 0
  64             && y < win->_maxy) {
  65             win->_flags &= ~_WRAPPED;
  66         }
  67
  68         /*
  69          * There's no point in clearing if we're not on a legal
  70          * position, either.
  71          */
  72         if ((win->_flags & _WRAPPED) != 0
  73             || y > win->_maxy
  74             || x > win->_maxx)
  75             returnCode(ERR);
  76
  77         blank = win->_nc_bkgd;
  78         line = &win->_line[y];
  79         CHANGED_TO_EOL(line, x, win->_maxx);
  80
  81         ptr = &(line->text[x]);
  82         end = &(line->text[win->_maxx]);
  83
  84         while (ptr <= end)
  85             *ptr++ = blank;
  86
  87         _nc_synchook(win);
  88         code = OK;
  89     }
  90     returnCode(code);
  91 }