srcend = srcp + __strnlen (srcp, len) + 1;
srcend = srcp + __strnlen ((const char *) srcp, len) + 1;
__mbsrtowcs_l (dst, src, len, ps, l)     wchar_t *dst;     const char **src;     size_t len;     mbstate_t *ps;     __locale_t l;{  struct __gconv_step_data data;  size_t result;  int status;  struct __gconv_step *towc;  size_t non_reversible;  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;  data.__trans = NULL;  /* Get the conversion functions.  */  fcts = get_gconv_fcts (l->__locales[LC_CTYPE]);  /* Get the structure with the function pointers.  */  towc = fcts->towc;  /* We have to handle DST == NULL special.  */  if (dst == NULL)    {      mbstate_t temp_state;      wchar_t buf[64];		/* Just an arbitrary size.  */      const unsigned char *inbuf = (const unsigned char *) *src;      const unsigned char *srcend = inbuf + strlen (inbuf) + 1;      temp_state = *data.__statep;      data.__statep = &temp_state;      result = 0;      data.__outbufend = (char *) buf + sizeof (buf);      do	{	  data.__outbuf = (char *) buf;	  status = DL_CALL_FCT (towc->__fct,				(towc, &data, &inbuf, srcend, NULL,				 &non_reversible, 0, 1));	  result += (wchar_t *) data.__outbuf - buf;	}      while (status == __GCONV_FULL_OUTPUT);      if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT)	{	  /* There better should be a NUL wide char at the end.  */	  assert (((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.  */      const unsigned char *srcp = (const unsigned char *) *src;      const unsigned char *srcend;      data.__outbuf = (unsigned char *) dst;      data.__outbufend = data.__outbuf + len * sizeof (wchar_t);      status = __GCONV_FULL_OUTPUT;      while (len > 0)	{	  /* Pessimistic guess as to how much input we can use.  In the	     worst case we need one input byte for one output wchar_t.  */	  srcend = srcp + __strnlen (srcp, len) + 1;	  status = DL_CALL_FCT (towc->__fct,				(towc, &data, &srcp, srcend, NULL,				 &non_reversible, 0, 1));	  if ((status != __GCONV_EMPTY_INPUT	       && status != __GCONV_INCOMPLETE_INPUT)	      /* Not all input read.  */	      || srcp != srcend	      /* Reached the end of the input.  */	      || srcend[-1] == '\0')	    break;	  len = (wchar_t *) data.__outbufend - (wchar_t *) data.__outbuf;	}      /* Make the end if the input known to the caller.  */      *src = srcp;      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)	  && ((wchar_t *) dst)[result - 1] == L'\0')	{	  assert (result > 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;}