1 /****************************************************************************
2 * Copyright 2020 Thomas E. Dickey *
3 * Copyright 1998-2016,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 ****************************************************************************/
34
35 /*
36 ** lib_touch.c
37 **
38 ** The routines untouchwin(),
39 ** wtouchln(),
40 ** is_linetouched()
41 ** is_wintouched().
42 **
43 */
44
45 #include <curses.priv.h>
46
47 MODULE_ID("$Id: lib_touch.c,v 1.16 2020/02/02 23:34:34 tom Exp $")
48
49 #undef is_linetouched
50
NCURSES_EXPORT(bool)51 NCURSES_EXPORT(bool)
52 is_linetouched(WINDOW *win, int line)
53 {
54 T((T_CALLED("is_linetouched(%p,%d)"), (void *) win, line));
55
56 /* XSI doesn't define any error, and gcc ultimately made it impossible */
57 if (!win || (line > win->_maxy) || (line < 0)) {
58 returnCode(FALSE);
59 }
60
61 returnCode(win->_line[line].firstchar != _NOCHANGE ? TRUE : FALSE);
62 }
63
64 NCURSES_EXPORT(bool)
is_wintouched(WINDOW * win)65 is_wintouched(WINDOW *win)
66 {
67 T((T_CALLED("is_wintouched(%p)"), (void *) win));
68
69 if (win) {
70 int i;
71
72 for (i = 0; i <= win->_maxy; i++)
73 if (win->_line[i].firstchar != _NOCHANGE)
74 returnCode(TRUE);
75 }
76 returnCode(FALSE);
77 }
78
79 NCURSES_EXPORT(int)
wtouchln(WINDOW * win,int y,int n,int changed)80 wtouchln(WINDOW *win, int y, int n, int changed)
81 {
82 int i;
83
84 T((T_CALLED("wtouchln(%p,%d,%d,%d)"), (void *) win, y, n, changed));
85
86 if (!win || (n < 0) || (y < 0) || (y > win->_maxy))
87 returnCode(ERR);
88
89 for (i = y; i < y + n; i++) {
90 if (i > win->_maxy)
91 break;
92 win->_line[i].firstchar = (NCURSES_SIZE_T) (changed ? 0 : _NOCHANGE);
93 win->_line[i].lastchar = (NCURSES_SIZE_T) (changed
94 ? win->_maxx
95 : _NOCHANGE);
96 }
97 returnCode(OK);
98 }
99