1 /****************************************************************************
2  * Copyright (c) 1998-2001,2009 Free Software Foundation, Inc.              *
3  *                                                                          *
4  * Permission is hereby granted, free of charge, to any person obtaining a  *
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.   *
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     *
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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_clreol.c
36 **
37 **	The routine wclrtoeol().
38 **
39 */
40 
41 #include <curses.priv.h>
42 
43 MODULE_ID("$Id: lib_clreol.c,v 1.22 2009/10/24 22:33:06 tom Exp $")
44 
45 NCURSES_EXPORT(int)
46 wclrtoeol(WINDOW *win)
47 {
48     int code = ERR;
49 
50     T((T_CALLED("wclrtoeol(%p)"), (void *) win));
51 
52     if (win) {
53 	NCURSES_CH_T blank;
54 	NCURSES_CH_T *ptr, *end;
55 	struct ldat *line;
56 	NCURSES_SIZE_T y = win->_cury;
57 	NCURSES_SIZE_T x = win->_curx;
58 
59 	/*
60 	 * If we have just wrapped the cursor, the clear applies to the
61 	 * new line, unless we are at the lower right corner.
62 	 */
63 	if ((win->_flags & _WRAPPED) != 0
64 	    && y < win->_maxy) {
65 	    win->_flags &= ~_WRAPPED;
66 	}
67 
68 	/*
69 	 * There's no point in clearing if we're not on a legal
70 	 * position, either.
71 	 */
72 	if ((win->_flags & _WRAPPED) != 0
73 	    || y > win->_maxy
74 	    || x > win->_maxx)
75 	    returnCode(ERR);
76 
77 	blank = win->_nc_bkgd;
78 	line = &win->_line[y];
79 	CHANGED_TO_EOL(line, x, win->_maxx);
80 
81 	ptr = &(line->text[x]);
82 	end = &(line->text[win->_maxx]);
83 
84 	while (ptr <= end)
85 	    *ptr++ = blank;
86 
87 	_nc_synchook(win);
88 	code = OK;
89     }
90     returnCode(code);
91 }
92