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, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
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
43 MODULE_ID("$Id: lib_redrawln.c,v 1.18 2020/02/02 23:34:34 tom Exp $")
44
NCURSES_EXPORT(int)45 NCURSES_EXPORT(int)
46 wredrawln(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