1/****************************************************************************
2 * Copyright (c) 1998-2000,2007 Free Software Foundation, Inc.              *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
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27 ****************************************************************************/
28
29#include <curses.priv.h>
30
31MODULE_ID("$Id: memmove.c,v 1.5 2007/08/11 17:12:43 tom Exp $")
32
33/****************************************************************************
34 *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
35 ****************************************************************************/
36
37#if USE_MY_MEMMOVE
38#define DST ((char *)s1)
39#define SRC ((const char *)s2)
40NCURSES_EXPORT(void *)
41_nc_memmove(void *s1, const void *s2, size_t n)
42{
43    if (n != 0) {
44	if ((DST + n > SRC) && (SRC + n > DST)) {
45	    static char *bfr;
46	    static size_t length;
47	    register size_t j;
48	    if (length < n) {
49		length = (n * 3) / 2;
50		bfr = typeRealloc(char, length, bfr);
51	    }
52	    for (j = 0; j < n; j++)
53		bfr[j] = SRC[j];
54	    s2 = bfr;
55	}
56	while (n-- != 0)
57	    DST[n] = SRC[n];
58    }
59    return s1;
60}
61#else
62extern
63NCURSES_EXPORT(void)
64_nc_memmove(void);		/* quiet's gcc warning */
65NCURSES_EXPORT(void)
66_nc_memmove(void)
67{
68}				/* nonempty for strict ANSI compilers */
69#endif /* USE_MY_MEMMOVE */
70