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
49 MODULE_ID("$Id: lib_touch.c,v 1.4 2023/10/17 09:52:09 nicm Exp $")
50
51 #undef is_linetouched
52
NCURSES_EXPORT(bool)53 NCURSES_EXPORT(bool)
54 is_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
66 NCURSES_EXPORT(bool)
is_wintouched(WINDOW * win)67 is_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
81 NCURSES_EXPORT(int)
wtouchln(WINDOW * win,int y,int n,int changed)82 wtouchln(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