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
45 MODULE_ID("$Id: lib_redrawln.c,v 1.5 2023/10/17 09:52:08 nicm Exp $")
46
NCURSES_EXPORT(int)47 NCURSES_EXPORT(int)
48 wredrawln(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