| 1 | /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues. |
| 2 | |
| 3 | Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | This program 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 |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software Foundation, |
| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 18 | |
| 19 | /* Written by Eric Blake. */ |
| 20 | |
| 21 | /* |
| 22 | * POSIX 2008 <stddef.h> for platforms that have issues. |
| 23 | * <http://www.opengroup.org/susv3xbd/stddef.h.html> |
| 24 | */ |
| 25 | |
| 26 | #if __GNUC__ >= 3 |
| 27 | @PRAGMA_SYSTEM_HEADER@ |
| 28 | #endif |
| 29 | |
| 30 | #if defined __need_wchar_t || defined __need_size_t \ |
| 31 | || defined __need_ptrdiff_t || defined __need_NULL \ |
| 32 | || defined __need_wint_t |
| 33 | /* Special invocation convention inside gcc header files. In |
| 34 | particular, gcc provides a version of <stddef.h> that blindly |
| 35 | redefines NULL even when __need_wint_t was defined, even though |
| 36 | wint_t is not normally provided by <stddef.h>. Hence, we must |
| 37 | remember if special invocation has ever been used to obtain wint_t, |
| 38 | in which case we need to clean up NULL yet again. */ |
| 39 | |
| 40 | # if !(defined _GL_STDDEF_H && defined _GL_STDDEF_WINT_T) |
| 41 | # ifdef __need_wint_t |
| 42 | # undef _GL_STDDEF_H |
| 43 | # define _GL_STDDEF_WINT_T |
| 44 | # endif |
| 45 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ |
| 46 | # endif |
| 47 | |
| 48 | #else |
| 49 | /* Normal invocation convention. */ |
| 50 | |
| 51 | # ifndef _GL_STDDEF_H |
| 52 | |
| 53 | /* The include_next requires a split double-inclusion guard. */ |
| 54 | |
| 55 | # @INCLUDE_NEXT@ @NEXT_STDDEF_H@ |
| 56 | |
| 57 | # ifndef _GL_STDDEF_H |
| 58 | # define _GL_STDDEF_H |
| 59 | |
| 60 | /* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */ |
| 61 | #if @REPLACE_NULL@ |
| 62 | # undef NULL |
| 63 | # ifdef __cplusplus |
| 64 | /* ISO C++ says that the macro NULL must expand to an integer constant |
| 65 | expression, hence '((void *) 0)' is not allowed in C++. */ |
| 66 | # if __GNUG__ >= 3 |
| 67 | /* GNU C++ has a __null macro that behaves like an integer ('int' or |
| 68 | 'long') but has the same size as a pointer. Use that, to avoid |
| 69 | warnings. */ |
| 70 | # define NULL __null |
| 71 | # else |
| 72 | # define NULL 0L |
| 73 | # endif |
| 74 | # else |
| 75 | # define NULL ((void *) 0) |
| 76 | # endif |
| 77 | #endif |
| 78 | |
| 79 | /* Some platforms lack wchar_t. */ |
| 80 | #if !@HAVE_WCHAR_T@ |
| 81 | # define wchar_t int |
| 82 | #endif |
| 83 | |
| 84 | # endif /* _GL_STDDEF_H */ |
| 85 | # endif /* _GL_STDDEF_H */ |
| 86 | #endif /* __need_XXX */ |