1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2009,2010 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
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25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
32 ****************************************************************************/
33
34/*
35 *	lib_redrawln.c
36 *
37 *	The routine wredrawln().
38 *
39 */
40
41#include <curses.priv.h>
42
43MODULE_ID("$Id: lib_redrawln.c,v 1.18 2020/02/02 23:34:34 tom Exp $")
44
45NCURSES_EXPORT(int)
46wredrawln(WINDOW *win, int beg, int num)
47{
48    int i;
49    int end;
50    size_t len;
51    SCREEN *sp;
52
53    T((T_CALLED("wredrawln(%p,%d,%d)"), (void *) win, beg, num));
54
55    if (win == 0)
56	returnCode(ERR);
57
58    sp = _nc_screen_of(win);
59
60    if (beg < 0)
61	beg = 0;
62
63    if (touchline(win, beg, num) == ERR)
64	returnCode(ERR);
65
66    if (touchline(CurScreen(sp), beg + win->_begy, num) == ERR)
67	returnCode(ERR);
68
69    end = beg + num;
70    if (end > CurScreen(sp)->_maxy + 1 - win->_begy)
71	end = CurScreen(sp)->_maxy + 1 - win->_begy;
72    if (end > win->_maxy + 1)
73	end = win->_maxy + 1;
74
75    len = (size_t) (win->_maxx + 1);
76    if (len > (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx))
77	len = (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx);
78    len *= sizeof(CurScreen(sp)->_line[0].text[0]);
79
80    for (i = beg; i < end; i++) {
81	int crow = i + win->_begy;
82
83	memset(CurScreen(sp)->_line[crow].text + win->_begx, 0, len);
84	NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx crow);
85    }
86
87    returnCode(OK);
88}
89