newlib/libc/string/wcsdup.c

   1 /*
   2 FUNCTION
   3         <<wcsdup>>---wide character string duplicate
   4
   5 INDEX
   6         wcsdup
   7 INDEX
   8         _wcsdup_r
   9
  10 SYNOPSIS
  11         #include <wchar.h>
  12         wchar_t *wcsdup(const wchar_t *<[str]>);
  13
  14         #include <wchar.h>
  15         wchar_t *_wcsdup_r(struct _reent *<[ptr]>, const wchar_t *<[str]>);
  16
  17 DESCRIPTION
  18         <<wcsdup>> allocates a new wide character string using <<malloc>>,
  19         and copies the content of the argument <[str]> into the newly
  20         allocated string, thus making a copy of <[str]>.
  21
  22 RETURNS
  23         <<wcsdup>> returns a pointer to the copy of <[str]> if enough
  24         memory for the copy was available.  Otherwise it returns NULL
  25         and errno is set to ENOMEM.
  26
  27 PORTABILITY
  28 POSIX-1.2008
  29
  30 QUICKREF
  31         wcsdup
  32 */
  33
  34 #include <reent.h>
  35 #include <stdlib.h>
  36 #include <wchar.h>
  37
  38 wchar_t *
  39 _wcsdup_r (struct _reent *p, const wchar_t *str)
  40 {
  41   size_t len = wcslen (str) + 1;
  42   wchar_t *copy = _malloc_r (p, len * sizeof (wchar_t));
  43   if (copy)
  44     wmemcpy (copy, str, len);
  45   return copy;
  46 }
  47
  48 #ifndef _REENT_ONLY
  49
  50 wchar_t *
  51 wcsdup (const wchar_t *str)
  52 {
  53   return _wcsdup_r (_REENT, str);
  54 }
  55
  56 #endif /* !_REENT_ONLY */