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Annotation of embedaddon/libiconv/srclib/stddef.in.h, revision 1.1.1.1

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 */