lib_redrawln.c revision 174994 
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2 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
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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 1.12 2007/10/13 20:08:56 tom Exp $")
43
44NCURSES_EXPORT(int)
45wredrawln(WINDOW *win, int beg, int num)
46{
47    int i;
48    int end;
49    size_t len;
50
51    T((T_CALLED("wredrawln(%p,%d,%d)"), win, beg, num));
52
53    if (win == 0)
54	returnCode(ERR);
55
56    if (beg < 0)
57	beg = 0;
58
59    if (touchline(win, beg, num) == ERR)
60	returnCode(ERR);
61
62    if (touchline(curscr, beg + win->_begy, num) == ERR)
63	returnCode(ERR);
64
65    end = beg + num;
66    if (end > curscr->_maxy + 1)
67	end = curscr->_maxy + 1;
68    if (end > win->_maxy + 1)
69	end = win->_maxy + 1;
70
71    len = (win->_maxx + 1);
72    if (len > (size_t) (curscr->_maxx + 1))
73	len = (size_t) (curscr->_maxx + 1);
74    len *= sizeof(curscr->_line[0].text[0]);
75
76    for (i = beg; i < end; i++) {
77	int crow = i + win->_begy;
78
79	memset(curscr->_line[crow].text + win->_begx, 0, len);
80	_nc_make_oldhash(crow);
81    }
82
83    returnCode(OK);
84}
85