1 /****************************************************************************
2  * Copyright (c) 1998 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      *
7  * without limitation the rights to use, copy, modify, merge, publish,      *
8  * distribute, distribute with modifications, sublicense, and/or sell       *
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     *
25  * sale, use or other dealings in this Software without prior written       *
26  * authorization.                                                           *
27  ****************************************************************************/
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 /*
36 **	lib_erase.c
37 **
38 **	The routine werase().
39 **
40 */
41 
42 #include <curses.priv.h>
43 
44 MODULE_ID("$Id: lib_erase.c,v 1.11 1998/02/11 12:13:54 tom Exp $")
45 
46 int  werase(WINDOW	*win)
47 {
48 int     code = ERR;
49 int	y;
50 chtype	blank;
51 chtype	*sp, *end, *start;
52 
53 	T((T_CALLED("werase(%p)"), win));
54 
55 	if (win) {
56 	  blank = _nc_background(win);
57 	  for (y = 0; y <= win->_maxy; y++) {
58 	    start = win->_line[y].text;
59 	    end = &start[win->_maxx];
60 
61 	    for (sp = start; sp <= end; sp++)
62 	      *sp = blank;
63 
64 	    win->_line[y].firstchar = 0;
65 	    win->_line[y].lastchar = win->_maxx;
66 	  }
67 	  win->_curx = win->_cury = 0;
68 	  win->_flags &= ~_WRAPPED;
69 	  _nc_synchook(win);
70 	  code = OK;
71 	}
72 	returnCode(code);
73 }
74