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88 lines
2.7 KiB
88 lines
2.7 KiB
14 years ago
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/* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
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Copyright (C) 2009-2011 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Eric Blake. */
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/*
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* POSIX 2008 <stddef.h> for platforms that have issues.
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* <http://www.opengroup.org/susv3xbd/stddef.h.html>
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*/
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#if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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#endif
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@PRAGMA_COLUMNS@
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#if defined __need_wchar_t || defined __need_size_t \
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|| defined __need_ptrdiff_t || defined __need_NULL \
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|| defined __need_wint_t
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/* Special invocation convention inside gcc header files. In
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particular, gcc provides a version of <stddef.h> that blindly
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redefines NULL even when __need_wint_t was defined, even though
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wint_t is not normally provided by <stddef.h>. Hence, we must
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remember if special invocation has ever been used to obtain wint_t,
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in which case we need to clean up NULL yet again. */
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# if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
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# ifdef __need_wint_t
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# undef _@GUARD_PREFIX@_STDDEF_H
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# define _GL_STDDEF_WINT_T
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# endif
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# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
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# endif
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#else
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/* Normal invocation convention. */
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# ifndef _@GUARD_PREFIX@_STDDEF_H
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/* The include_next requires a split double-inclusion guard. */
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# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
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# ifndef _@GUARD_PREFIX@_STDDEF_H
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# define _@GUARD_PREFIX@_STDDEF_H
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/* On NetBSD 5.0, the definition of NULL lacks proper parentheses. */
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#if @REPLACE_NULL@
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# undef NULL
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# ifdef __cplusplus
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/* ISO C++ says that the macro NULL must expand to an integer constant
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expression, hence '((void *) 0)' is not allowed in C++. */
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# if __GNUG__ >= 3
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/* GNU C++ has a __null macro that behaves like an integer ('int' or
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'long') but has the same size as a pointer. Use that, to avoid
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warnings. */
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# define NULL __null
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# else
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# define NULL 0L
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# endif
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# else
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# define NULL ((void *) 0)
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# endif
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#endif
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/* Some platforms lack wchar_t. */
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#if !@HAVE_WCHAR_T@
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# define wchar_t int
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#endif
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# endif /* _@GUARD_PREFIX@_STDDEF_H */
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# endif /* _@GUARD_PREFIX@_STDDEF_H */
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#endif /* __need_XXX */
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