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      1 /* wchar_t type related definitions.
      2    Copyright (C) 2000 Free Software Foundation, Inc.
      3    This file is part of the GNU C Library.
      4 
      5    The GNU C Library is free software; you can redistribute it and/or
      6    modify it under the terms of the GNU Lesser General Public
      7    License as published by the Free Software Foundation; either
      8    version 2.1 of the License, or (at your option) any later version.
      9 
     10    The GNU C Library is distributed in the hope that it will be useful,
     11    but WITHOUT ANY WARRANTY; without even the implied warranty of
     12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13    Lesser General Public License for more details.
     14 
     15    You should have received a copy of the GNU Lesser General Public
     16    License along with the GNU C Library; if not, write to the Free
     17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     18    02111-1307 USA.  */
     19 
     20 #ifndef _BITS_WCHAR_H
     21 #define _BITS_WCHAR_H	1
     22 
     23 /* Use GCC's __WCHAR_MAX__ when available.  */
     24 #ifdef __WCHAR_MAX__
     25 #define __WCHAR_MAX	__WCHAR_MAX__
     26 #else
     27 #define __WCHAR_MAX	(2147483647)
     28 #endif
     29 
     30 /* GCC may also define __WCHAR_UNSIGNED__.
     31    Use L'\0' to give the expression the correct (unsigned) type.  */
     32 #ifdef __WCHAR_UNSIGNED__
     33 #define __WCHAR_MIN       L'\0'
     34 
     35 /* Failing that, rely on the preprocessor's knowledge of the
     36    signedness of wchar_t.  */
     37 #elif L'\0' - 1 > 0
     38 #define __WCHAR_MIN       L'\0'
     39 #else
     40 #define __WCHAR_MIN       (-__WCHAR_MAX - 1)
     41 #endif
     42 
     43 #endif	/* bits/wchar.h */
     44