wint_t wdecimal = L'\0'; wint_t wthousands = L'\0';
_i18n_number_rewrite (CHAR_T *w, CHAR_T *rear_ptr){#ifdef COMPILE_WPRINTF  wint_t wdecimal = L'\0';  wint_t wthousands = L'\0';# define decimal NULL# define thousands NULL#else# define wdecimal L'\0'# define wthousands L'\0'  char decimal[MB_LEN_MAX];  char thousands[MB_LEN_MAX];#endif  /* "to_outpunct" is a map from ASCII decimal point and thousands-sep     to their equivalent in locale. This is defined for locales which     use extra decimal point and thousands-sep.  */  wctrans_t map = __wctrans ("to_outpunct");  if (map != NULL)    {      mbstate_t state;      memset (&state, '\0', sizeof (state));      if (__wcrtomb (decimal, wdecimal, &state) == (size_t) -1)	memcpy (decimal, ".", 2);      memset (&state, '\0', sizeof (state));      if (__wcrtomb (thousands, wthousands, &state) == (size_t) -1)	memcpy (thousands, ",", 2);    }  /* Copy existing string so that nothing gets overwritten.  */  CHAR_T *src = (CHAR_T *) alloca ((rear_ptr - w) * sizeof (CHAR_T));  CHAR_T *s = (CHAR_T *) __mempcpy (src, w,				    (rear_ptr - w) * sizeof (CHAR_T));  w = rear_ptr;  /* Process all characters in the string.  */  while (--s >= src)    {      if (*s >= '0' && *s <= '9')	{	  if (sizeof (CHAR_T) == 1)	    w = (CHAR_T *) outdigit_value ((char *) w, *s - '0');	  else	    *--w = (CHAR_T) outdigitwc_value (*s - '0');	}      else if (__builtin_expect (map == NULL, 1) || (*s != '.' && *s != ','))	*--w = *s;      else	{	  if (sizeof (CHAR_T) == 1)	    {	      const char *outpunct = *s == '.' ? decimal : thousands;	      size_t dlen = strlen (outpunct);	      w -= dlen;	      while (dlen-- > 0)		w[dlen] = outpunct[dlen];	    }	  else	    *--w = *s == '.' ? (CHAR_T) wdecimal : (CHAR_T) wthousands;	}    }  return w;}