1/****************************************************************************
2 * Copyright (c) 1998,2000,2001 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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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,   *
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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_erase.c
36**
37**	The routine werase().
38**
39*/
40
41#include <curses.priv.h>
42
43MODULE_ID("$Id: lib_erase.c,v 1.15 2001/12/19 01:06:13 tom Exp $")
44
45NCURSES_EXPORT(int)
46werase(WINDOW *win)
47{
48    int code = ERR;
49    int y;
50    NCURSES_CH_T blank;
51    NCURSES_CH_T *sp, *end, *start;
52
53    T((T_CALLED("werase(%p)"), win));
54
55    if (win) {
56	blank = win->_nc_bkgd;
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