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Annotation of embedaddon/libiconv/srclib/stddef.in.h, revision 1.1

1.1     ! misho       1: /* A substitute for POSIX 2008 <stddef.h>, for platforms that have issues.
        !             2: 
        !             3:    Copyright (C) 2009-2011 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: @PRAGMA_COLUMNS@
        !            30: 
        !            31: #if defined __need_wchar_t || defined __need_size_t  \
        !            32:   || defined __need_ptrdiff_t || defined __need_NULL \
        !            33:   || defined __need_wint_t
        !            34: /* Special invocation convention inside gcc header files.  In
        !            35:    particular, gcc provides a version of <stddef.h> that blindly
        !            36:    redefines NULL even when __need_wint_t was defined, even though
        !            37:    wint_t is not normally provided by <stddef.h>.  Hence, we must
        !            38:    remember if special invocation has ever been used to obtain wint_t,
        !            39:    in which case we need to clean up NULL yet again.  */
        !            40: 
        !            41: # if !(defined _@GUARD_PREFIX@_STDDEF_H && defined _GL_STDDEF_WINT_T)
        !            42: #  ifdef __need_wint_t
        !            43: #   undef _@GUARD_PREFIX@_STDDEF_H
        !            44: #   define _GL_STDDEF_WINT_T
        !            45: #  endif
        !            46: #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
        !            47: # endif
        !            48: 
        !            49: #else
        !            50: /* Normal invocation convention.  */
        !            51: 
        !            52: # ifndef _@GUARD_PREFIX@_STDDEF_H
        !            53: 
        !            54: /* The include_next requires a split double-inclusion guard.  */
        !            55: 
        !            56: #  @INCLUDE_NEXT@ @NEXT_STDDEF_H@
        !            57: 
        !            58: #  ifndef _@GUARD_PREFIX@_STDDEF_H
        !            59: #   define _@GUARD_PREFIX@_STDDEF_H
        !            60: 
        !            61: /* On NetBSD 5.0, the definition of NULL lacks proper parentheses.  */
        !            62: #if @REPLACE_NULL@
        !            63: # undef NULL
        !            64: # ifdef __cplusplus
        !            65:    /* ISO C++ says that the macro NULL must expand to an integer constant
        !            66:       expression, hence '((void *) 0)' is not allowed in C++.  */
        !            67: #  if __GNUG__ >= 3
        !            68:     /* GNU C++ has a __null macro that behaves like an integer ('int' or
        !            69:        'long') but has the same size as a pointer.  Use that, to avoid
        !            70:        warnings.  */
        !            71: #   define NULL __null
        !            72: #  else
        !            73: #   define NULL 0L
        !            74: #  endif
        !            75: # else
        !            76: #  define NULL ((void *) 0)
        !            77: # endif
        !            78: #endif
        !            79: 
        !            80: /* Some platforms lack wchar_t.  */
        !            81: #if !@HAVE_WCHAR_T@
        !            82: # define wchar_t int
        !            83: #endif
        !            84: 
        !            85: #  endif /* _@GUARD_PREFIX@_STDDEF_H */
        !            86: # endif /* _@GUARD_PREFIX@_STDDEF_H */
        !            87: #endif /* __need_XXX */