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wcsdup.c revision 1.5 
      1 /*	$NetBSD: wcsdup.c,v 1.5 2021/10/29 11:03:46 nia 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 1.5 2021/10/29 11:03:46 nia 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 
     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 	if (reallocarr(&copy, len, sizeof(wchar_t)) != 0) {
     40 		errno = ENOMEM;
     41 		return NULL;
     42 	}
     43 
     44 	return wmemcpy(copy, str, len);
     45 }
     46