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

   1 /****************************************************************************
   2  * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc.              *
   3  *                                                                          *
   4  * Permission is hereby granted, free of charge, to any person obtaining a  *
   5  * copy of this software and associated documentation files (the            *
   6  * "Software"), to deal in the Software without restriction, including      *
   7  * without limitation the rights to use, copy, modify, merge, publish,      *
   8  * distribute, distribute with modifications, sublicense, and/or sell       *
   9  * copies of the Software, and to permit persons to whom the Software is    *
  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  *
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  18  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  22  *                                                                          *
  23  * Except as contained in this notice, the name(s) of the above copyright   *
  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  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_touch.c
  36 **
  37 **         The routines untouchwin(),
  38 **                      wtouchln(),
  39 **                      is_linetouched()
  40 **                      is_wintouched().
  41 **
  42 */
  43
  44 #include <curses.priv.h>
  45
  46 MODULE_ID("$Id: lib_touch.c,v 1.11 2010/12/19 01:22:58 tom Exp $")
  47
  48 NCURSES_EXPORT(bool)
  49 is_linetouched(WINDOW *win, int line)
  50 {
  51     T((T_CALLED("is_linetouched(%p,%d)"), (void *) win, line));
  52
  53     /* XSI doesn't define any error */
  54     if (!win || (line > win->_maxy) || (line < 0))
  55         returnCode((bool) ERR);
  56
  57     returnCode(win->_line[line].firstchar != _NOCHANGE ? TRUE : FALSE);
  58 }
  59
  60 NCURSES_EXPORT(bool)
  61 is_wintouched(WINDOW *win)
  62 {
  63     int i;
  64
  65     T((T_CALLED("is_wintouched(%p)"), (void *) win));
  66
  67     if (win)
  68         for (i = 0; i <= win->_maxy; i++)
  69             if (win->_line[i].firstchar != _NOCHANGE)
  70                 returnCode(TRUE);
  71     returnCode(FALSE);
  72 }
  73
  74 NCURSES_EXPORT(int)
  75 wtouchln(WINDOW *win, int y, int n, int changed)
  76 {
  77     int i;
  78
  79     T((T_CALLED("wtouchln(%p,%d,%d,%d)"), (void *) win, y, n, changed));
  80
  81     if (!win || (n < 0) || (y < 0) || (y > win->_maxy))
  82         returnCode(ERR);
  83
  84     for (i = y; i < y + n; i++) {
  85         if (i > win->_maxy)
  86             break;
  87         win->_line[i].firstchar = changed ? 0 : _NOCHANGE;
  88         win->_line[i].lastchar = (NCURSES_SIZE_T) (changed
  89                                                    ? win->_maxx
  90                                                    : _NOCHANGE);
  91     }
  92     returnCode(OK);
  93 }