1/* $OpenBSD: lib_touch.c,v 1.4 2023/10/17 09:52:09 nicm Exp $ */
2
3/****************************************************************************
4 * Copyright 2020 Thomas E. Dickey                                          *
5 * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
6 *                                                                          *
7 * Permission is hereby granted, free of charge, to any person obtaining a  *
8 * copy of this software and associated documentation files (the            *
9 * "Software"), to deal in the Software without restriction, including      *
10 * without limitation the rights to use, copy, modify, merge, publish,      *
11 * distribute, distribute with modifications, sublicense, and/or sell       *
12 * copies of the Software, and to permit persons to whom the Software is    *
13 * furnished to do so, subject to the following conditions:                 *
14 *                                                                          *
15 * The above copyright notice and this permission notice shall be included  *
16 * in all copies or substantial portions of the Software.                   *
17 *                                                                          *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25 *                                                                          *
26 * Except as contained in this notice, the name(s) of the above copyright   *
27 * holders shall not be used in advertising or otherwise to promote the     *
28 * sale, use or other dealings in this Software without prior written       *
29 * authorization.                                                           *
30 ****************************************************************************/
31
32/****************************************************************************
33 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
34 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
35 ****************************************************************************/
36
37/*
38**	lib_touch.c
39**
40**	   The routines	untouchwin(),
41**			wtouchln(),
42**			is_linetouched()
43**			is_wintouched().
44**
45*/
46
47#include <curses.priv.h>
48
49MODULE_ID("$Id: lib_touch.c,v 1.4 2023/10/17 09:52:09 nicm Exp $")
50
51#undef is_linetouched
52
53NCURSES_EXPORT(bool)
54is_linetouched(WINDOW *win, int line)
55{
56    T((T_CALLED("is_linetouched(%p,%d)"), (void *) win, line));
57
58    /* XSI doesn't define any error, and gcc ultimately made it impossible */
59    if (!win || (line > win->_maxy) || (line < 0)) {
60	returnCode(FALSE);
61    }
62
63    returnCode(win->_line[line].firstchar != _NOCHANGE ? TRUE : FALSE);
64}
65
66NCURSES_EXPORT(bool)
67is_wintouched(WINDOW *win)
68{
69    T((T_CALLED("is_wintouched(%p)"), (void *) win));
70
71    if (win) {
72	int i;
73
74	for (i = 0; i <= win->_maxy; i++)
75	    if (win->_line[i].firstchar != _NOCHANGE)
76		returnCode(TRUE);
77    }
78    returnCode(FALSE);
79}
80
81NCURSES_EXPORT(int)
82wtouchln(WINDOW *win, int y, int n, int changed)
83{
84    int i;
85
86    T((T_CALLED("wtouchln(%p,%d,%d,%d)"), (void *) win, y, n, changed));
87
88    if (!win || (n < 0) || (y < 0) || (y > win->_maxy))
89	returnCode(ERR);
90
91    for (i = y; i < y + n; i++) {
92	if (i > win->_maxy)
93	    break;
94	win->_line[i].firstchar = (NCURSES_SIZE_T) (changed ? 0 : _NOCHANGE);
95	win->_line[i].lastchar = (NCURSES_SIZE_T) (changed
96						   ? win->_maxx
97						   : _NOCHANGE);
98    }
99    returnCode(OK);
100}
101