1 /****************************************************************************
2  * Copyright (c) 1998-2010,2012 Free Software Foundation, Inc.              *
3  *                                                                          *
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5  * copy of this software and associated documentation files (the            *
6  * "Software"), to deal in the Software without restriction, including      *
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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.   *
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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   *
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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 1.12 2012/06/09 20:29:33 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 = (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