lib_redrawln.c revision 97049 
1/****************************************************************************
2 * Copyright (c) 1998,2000,2001 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: Thomas E. Dickey <dickey@clark.net> 1997                        *
31 ****************************************************************************/
32
33/*
34 *	lib_redrawln.c
35 *
36 *	The routine wredrawln().
37 *
38 */
39
40#include <curses.priv.h>
41
42MODULE_ID("$Id: lib_redrawln.c,v 1.10 2001/09/29 17:41:31 tom Exp $")
43
44NCURSES_EXPORT(int)
45wredrawln(WINDOW *win, int beg, int num)
46{
47    int i;
48    int end;
49    size_t len = (win->_maxx + 1);
50
51    T((T_CALLED("wredrawln(%p,%d,%d)"), win, beg, num));
52
53    if (beg < 0)
54	beg = 0;
55
56    if (touchline(win, beg, num) == ERR)
57	returnCode(ERR);
58
59    end = beg + num;
60    if (end > curscr->_maxy + 1)
61	end = curscr->_maxy + 1;
62    if (end > win->_maxy + 1)
63	end = win->_maxy + 1;
64
65    if (len > (size_t) (curscr->_maxx + 1))
66	len = (size_t) (curscr->_maxx + 1);
67    len *= sizeof(curscr->_line[0].text[0]);
68
69    for (i = beg; i < end; i++) {
70	memset(curscr->_line[i + win->_begy].text + win->_begx, 0, len);
71	_nc_make_oldhash(i + win->_begy);
72    }
73
74    returnCode(OK);
75}
76