1 /*        $NetBSD: wcsdup.c,v 1.6 2022/03/12 17:31:40 christos Exp $  */
2 
3 /*
4  * Copyright (C) 2006 Aleksey Cheusov
5  *
6  * This material is provided "as is", with absolutely no warranty expressed
7  * or implied. Any use is at your own risk.
8  *
9  * Permission to use or copy this software for any purpose is hereby granted
10  * without fee. Permission to modify the code and to distribute modified
11  * code is also granted without any restrictions.
12  */
13 
14 #include <sys/cdefs.h>
15 
16 #if defined(LIBC_SCCS) && !defined(lint)
17 __RCSID("$NetBSD: wcsdup.c,v 1.6 2022/03/12 17:31:40 christos Exp $");
18 #endif /* LIBC_SCCS and not lint */
19 
20 #include "namespace.h"
21 #include <stdlib.h>
22 #include <assert.h>
23 #include <errno.h>
24 #include <wchar.h>
25 
__weak_alias(wcsdup,_wcsdup)26 __weak_alias(wcsdup,_wcsdup)
27 
28 wchar_t *
29 wcsdup(const wchar_t *str)
30 {
31           wchar_t *copy;
32           size_t len;
33 
34           _DIAGASSERT(str != NULL);
35 
36           len = wcslen(str) + 1;
37 
38           copy = NULL;
39           errno = reallocarr(&copy, len, sizeof(*copy));
40           if (errno)
41                     return NULL;
42 
43           return wmemcpy(copy, str, len);
44 }
45