lib_touch.c revision 262685 
1270346Sjfv/****************************************************************************
2270346Sjfv * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc.              *
3319182Sngie *                                                                          *
4270346Sjfv * Permission is hereby granted, free of charge, to any person obtaining a  *
5270346Sjfv * copy of this software and associated documentation files (the            *
6318357Serj * "Software"), to deal in the Software without restriction, including      *
7318357Serj * without limitation the rights to use, copy, modify, merge, publish,      *
8270346Sjfv * distribute, distribute with modifications, sublicense, and/or sell       *
9270346Sjfv * copies of the Software, and to permit persons to whom the Software is    *
10270346Sjfv * furnished to do so, subject to the following conditions:                 *
11284049Sjfv *                                                                          *
12270346Sjfv * The above copyright notice and this permission notice shall be included  *
13270346Sjfv * in all copies or substantial portions of the Software.                   *
14303967Ssbruno *                                                                          *
15270346Sjfv * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16270346Sjfv * 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
46MODULE_ID("$Id: lib_touch.c,v 1.12 2012/06/09 20:29:33 tom Exp $")
47
48NCURSES_EXPORT(bool)
49is_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
60NCURSES_EXPORT(bool)
61is_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
74NCURSES_EXPORT(int)
75wtouchln(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 = (NCURSES_SIZE_T) (changed ? 0 : _NOCHANGE);
88	win->_line[i].lastchar = (NCURSES_SIZE_T) (changed
89						   ? win->_maxx
90						   : _NOCHANGE);
91    }
92    returnCode(OK);
93}
94