1*53ee8cc1Swenshuai.xi /* wchar_t type related definitions. 2*53ee8cc1Swenshuai.xi Copyright (C) 2000 Free Software Foundation, Inc. 3*53ee8cc1Swenshuai.xi This file is part of the GNU C Library. 4*53ee8cc1Swenshuai.xi 5*53ee8cc1Swenshuai.xi The GNU C Library is free software; you can redistribute it and/or 6*53ee8cc1Swenshuai.xi modify it under the terms of the GNU Lesser General Public 7*53ee8cc1Swenshuai.xi License as published by the Free Software Foundation; either 8*53ee8cc1Swenshuai.xi version 2.1 of the License, or (at your option) any later version. 9*53ee8cc1Swenshuai.xi 10*53ee8cc1Swenshuai.xi The GNU C Library is distributed in the hope that it will be useful, 11*53ee8cc1Swenshuai.xi but WITHOUT ANY WARRANTY; without even the implied warranty of 12*53ee8cc1Swenshuai.xi MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13*53ee8cc1Swenshuai.xi Lesser General Public License for more details. 14*53ee8cc1Swenshuai.xi 15*53ee8cc1Swenshuai.xi You should have received a copy of the GNU Lesser General Public 16*53ee8cc1Swenshuai.xi License along with the GNU C Library; if not, write to the Free 17*53ee8cc1Swenshuai.xi Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18*53ee8cc1Swenshuai.xi 02111-1307 USA. */ 19*53ee8cc1Swenshuai.xi 20*53ee8cc1Swenshuai.xi #ifndef _BITS_WCHAR_H 21*53ee8cc1Swenshuai.xi #define _BITS_WCHAR_H 1 22*53ee8cc1Swenshuai.xi 23*53ee8cc1Swenshuai.xi /* Use GCC's __WCHAR_MAX__ when available. */ 24*53ee8cc1Swenshuai.xi #ifdef __WCHAR_MAX__ 25*53ee8cc1Swenshuai.xi #define __WCHAR_MAX __WCHAR_MAX__ 26*53ee8cc1Swenshuai.xi #else 27*53ee8cc1Swenshuai.xi #define __WCHAR_MAX (2147483647) 28*53ee8cc1Swenshuai.xi #endif 29*53ee8cc1Swenshuai.xi 30*53ee8cc1Swenshuai.xi /* GCC may also define __WCHAR_UNSIGNED__. 31*53ee8cc1Swenshuai.xi Use L'\0' to give the expression the correct (unsigned) type. */ 32*53ee8cc1Swenshuai.xi #ifdef __WCHAR_UNSIGNED__ 33*53ee8cc1Swenshuai.xi #define __WCHAR_MIN L'\0' 34*53ee8cc1Swenshuai.xi 35*53ee8cc1Swenshuai.xi /* Failing that, rely on the preprocessor's knowledge of the 36*53ee8cc1Swenshuai.xi signedness of wchar_t. */ 37*53ee8cc1Swenshuai.xi #elif L'\0' - 1 > 0 38*53ee8cc1Swenshuai.xi #define __WCHAR_MIN L'\0' 39*53ee8cc1Swenshuai.xi #else 40*53ee8cc1Swenshuai.xi #define __WCHAR_MIN (-__WCHAR_MAX - 1) 41*53ee8cc1Swenshuai.xi #endif 42*53ee8cc1Swenshuai.xi 43*53ee8cc1Swenshuai.xi #endif /* bits/wchar.h */ 44