1 /****************************************************************************
2 * Copyright (c) 1998-2000,2007 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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8 * distribute, distribute with modifications, sublicense, and/or sell *
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 * *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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27 ****************************************************************************/
28
29 #include <curses.priv.h>
30
31 MODULE_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)
NCURSES_EXPORT(void *)40 NCURSES_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
62 extern
63 NCURSES_EXPORT(void)
64 _nc_memmove(void); /* quiet's gcc warning */
65 NCURSES_EXPORT(void)
66 _nc_memmove(void)
67 {
68 } /* nonempty for strict ANSI compilers */
69 #endif /* USE_MY_MEMMOVE */
70