srcend = *src + __strnlen (*src, nmc - 1) + 1;
srcend = (const unsigned char *) *src + __strnlen (*src, nmc - 1) + 1;
__mbsnrtowcs (dst, src, nmc, len, ps)     wchar_t *dst;     const char **src;     size_t nmc;     size_t len;     mbstate_t *ps;{  const unsigned char *srcend;  struct __gconv_step_data data;  size_t result;  int status;  struct __gconv_step *towc;  size_t dummy;  const struct gconv_fcts *fcts;  /* Tell where we want the result.  */  data.__invocation_counter = 0;  data.__internal_use = 1;  data.__flags = __GCONV_IS_LAST;  data.__statep = ps ?: &state;  data.__trans = NULL;  if (nmc == 0)    return 0;  srcend = *src + __strnlen (*src, nmc - 1) + 1;  /* Get the conversion functions.  */  fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));  /* Get the structure with the function pointers.  */  towc = fcts->towc;  /* We have to handle DST == NULL special.  */  if (dst == NULL)    {      wchar_t buf[64];		/* Just an arbitrary size.  */      const unsigned char *inbuf = *src;      result = 0;      data.__outbufend = (unsigned char *) buf + sizeof (buf);      do	{	  data.__outbuf = (unsigned char *) buf;	  status = DL_CALL_FCT (towc->__fct,				(towc, &data, &inbuf, srcend, NULL,				 &dummy, 0, 1));	  result += (wchar_t *) data.__outbuf - buf;	}      while (status == __GCONV_FULL_OUTPUT);      if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)	  && ((wchar_t *) data.__outbuf)[-1] == L'\0')	/* Don't count the NUL character in.  */	--result;    }  else    {      /* This code is based on the safe assumption that all internal	 multi-byte encodings use the NUL byte only to mark the end	 of the string.  */      data.__outbuf = (unsigned char *) dst;      data.__outbufend = data.__outbuf + len * sizeof (wchar_t);      status = DL_CALL_FCT (towc->__fct,			    (towc, &data, (const unsigned char **) src, srcend,			     NULL, &dummy, 0, 1));      result = (wchar_t *) data.__outbuf - dst;      /* We have to determine whether the last character converted	 is the NUL character.  */      if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)	  && (assert (result > 0),	      ((wchar_t *) dst)[result - 1] == L'\0'))	{	  assert (__mbsinit (data.__statep));	  *src = NULL;	  --result;	}    }  /* There must not be any problems with the conversion but illegal input     characters.  */  assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT	  || status == __GCONV_ILLEGAL_INPUT	  || status == __GCONV_INCOMPLETE_INPUT	  || status == __GCONV_FULL_OUTPUT);  if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT      && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT)    {      result = (size_t) -1;      __set_errno (EILSEQ);    }  return result;}