2964 need POSIX 2008 locale object support
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 1,6 ****
--- 1,7 ----
  /*
+  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   * Copyright (c) 2002, 2003 Tim J. Robbins.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
*** 26,39 ****
   */
  
  #include "lint.h"
  #include <stdio.h>
  #include <wchar.h>
  #include "mblocal.h"
  
  wint_t
! btowc(int c)
  {
          static const mbstate_t initial = { 0 };
          mbstate_t mbs = initial;
          char cc;
          wchar_t wc;
--- 27,42 ----
   */
  
  #include "lint.h"
  #include <stdio.h>
  #include <wchar.h>
+ #include <locale.h>
+ #include <xlocale.h>
  #include "mblocal.h"
  
  wint_t
! btowc_l(int c, locale_t loc)
  {
          static const mbstate_t initial = { 0 };
          mbstate_t mbs = initial;
          char cc;
          wchar_t wc;
*** 44,52 ****
           * We expect mbrtowc() to return 0 or 1, hence the check for n > 1
           * which detects error return values as well as "impossible" byte
           * counts.
           */
          cc = (char)c;
!         if (__mbrtowc(&wc, &cc, 1, &mbs) > 1)
                  return (WEOF);
          return (wc);
  }
--- 47,61 ----
           * We expect mbrtowc() to return 0 or 1, hence the check for n > 1
           * which detects error return values as well as "impossible" byte
           * counts.
           */
          cc = (char)c;
!         if (mbrtowc_l(&wc, &cc, 1, &mbs, loc) > 1)
                  return (WEOF);
          return (wc);
+ }
+ 
+ wint_t
+ btowc(int c)
+ {
+         return (btowc_l(c, uselocale(NULL)));
  }