1/* $OpenBSD: lib_redrawln.c,v 1.5 2023/10/17 09:52:08 nicm Exp $ */
2
3/****************************************************************************
4 * Copyright 2020 Thomas E. Dickey                                          *
5 * Copyright 1998-2009,2010 Free Software Foundation, Inc.                  *
6 *                                                                          *
7 * Permission is hereby granted, free of charge, to any person obtaining a  *
8 * copy of this software and associated documentation files (the            *
9 * "Software"), to deal in the Software without restriction, including      *
10 * without limitation the rights to use, copy, modify, merge, publish,      *
11 * distribute, distribute with modifications, sublicense, and/or sell       *
12 * copies of the Software, and to permit persons to whom the Software is    *
13 * furnished to do so, subject to the following conditions:                 *
14 *                                                                          *
15 * The above copyright notice and this permission notice shall be included  *
16 * in all copies or substantial portions of the Software.                   *
17 *                                                                          *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25 *                                                                          *
26 * Except as contained in this notice, the name(s) of the above copyright   *
27 * holders shall not be used in advertising or otherwise to promote the     *
28 * sale, use or other dealings in this Software without prior written       *
29 * authorization.                                                           *
30 ****************************************************************************/
31
32/****************************************************************************
33 *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
34 ****************************************************************************/
35
36/*
37 *	lib_redrawln.c
38 *
39 *	The routine wredrawln().
40 *
41 */
42
43#include <curses.priv.h>
44
45MODULE_ID("$Id: lib_redrawln.c,v 1.5 2023/10/17 09:52:08 nicm Exp $")
46
47NCURSES_EXPORT(int)
48wredrawln(WINDOW *win, int beg, int num)
49{
50    int i;
51    int end;
52    size_t len;
53    SCREEN *sp;
54
55    T((T_CALLED("wredrawln(%p,%d,%d)"), (void *) win, beg, num));
56
57    if (win == 0)
58	returnCode(ERR);
59
60    sp = _nc_screen_of(win);
61
62    if (beg < 0)
63	beg = 0;
64
65    if (touchline(win, beg, num) == ERR)
66	returnCode(ERR);
67
68    if (touchline(CurScreen(sp), beg + win->_begy, num) == ERR)
69	returnCode(ERR);
70
71    end = beg + num;
72    if (end > CurScreen(sp)->_maxy + 1 - win->_begy)
73	end = CurScreen(sp)->_maxy + 1 - win->_begy;
74    if (end > win->_maxy + 1)
75	end = win->_maxy + 1;
76
77    len = (size_t) (win->_maxx + 1);
78    if (len > (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx))
79	len = (size_t) (CurScreen(sp)->_maxx + 1 - win->_begx);
80    len *= sizeof(CurScreen(sp)->_line[0].text[0]);
81
82    for (i = beg; i < end; i++) {
83	int crow = i + win->_begy;
84
85	memset(CurScreen(sp)->_line[crow].text + win->_begx, 0, len);
86	NCURSES_SP_NAME(_nc_make_oldhash) (NCURSES_SP_ARGx crow);
87    }
88
89    returnCode(OK);
90}
91