stddef.h

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/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if 
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston MA 02111-1307, USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/

#if (!defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
     && !defined(__STDDEF_H__)) \
    || defined(__need_wchar_t) || defined(__need_size_t) \
    || defined(__need_ptrdiff_t) || defined(__need_NULL) \
    || defined(__need_wint_t)

/* Any one of these symbols __need_* means that GNU libc
   wants us just to define one data type.  So don't define
   the symbols that indicate this file's entire job has been done.  */
#if (!defined(__need_wchar_t) && !defined(__need_size_t)        \
     && !defined(__need_ptrdiff_t) && !defined(__need_NULL)     \
     && !defined(__need_wint_t))
#define _STDDEF_H
#define _STDDEF_H_
/* snaroff@next.com says the NeXT needs this.  */
#define _ANSI_STDDEF_H
/* Irix 5.1 needs this.  */
#define __STDDEF_H__
#endif

#ifndef __sys_stdtypes_h
/* This avoids lossage on SunOS but only if stdtypes.h comes first.
   There's no way to win with the other order!  Sun lossage.  */

/* On 4.3bsd-net2, make sure ansi.h is included, so we have
   one less case to deal with in the following.  */
#if defined (__BSD_NET2__) || defined (____386BSD____) || defined (__FreeBSD__) || defined(__NetBSD__)
#include <machine/ansi.h>
#endif

/* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
   defined if the corresponding type is *not* defined.
   FreeBSD-2.1 defines _MACHINE_ANSI_H_ instead of _ANSI_H_ */
#if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_)
#if !defined(_SIZE_T_) && !defined(_BSD_SIZE_T_)
#define _SIZE_T
#endif
#if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
#define _PTRDIFF_T
#endif
/* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
   instead of _WCHAR_T_. */
#if !defined(_WCHAR_T_) && !defined(_BSD_WCHAR_T_)
#ifndef _BSD_WCHAR_T_
#define _WCHAR_T
#endif
#endif
/* Undef _FOO_T_ if we are supposed to define foo_t.  */
#if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
#undef _PTRDIFF_T_
#undef _BSD_PTRDIFF_T_
#endif
#if defined (__need_size_t) || defined (_STDDEF_H_)
#undef _SIZE_T_
#undef _BSD_SIZE_T_
#endif
#if defined (__need_wchar_t) || defined (_STDDEF_H_)
#undef _WCHAR_T_
#undef _BSD_WCHAR_T_
#endif
#endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) */

/* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
   Just ignore it.  */
#if defined (__sequent__) && defined (_PTRDIFF_T_)
#undef _PTRDIFF_T_
#endif

/* On VxWorks, <type/vxTypesBase.h> may have defined macros like
   _TYPE_size_t which will typedef size_t.  fixincludes patched the
   vxTypesBase.h so that this macro is only defined if _GCC_SIZE_T is
   not defined, and so that defining this macro defines _GCC_SIZE_T.
   If we find that the macros are still defined at this point, we must
   invoke them so that the type is defined as expected.  */
#if defined (_TYPE_ptrdiff_t) && (defined (__need_ptrdiff_t) || defined (_STDDEF_H_))
_TYPE_ptrdiff_t;
#undef _TYPE_ptrdiff_t
#endif
#if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
_TYPE_size_t;
#undef _TYPE_size_t
#endif
#if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
_TYPE_wchar_t;
#undef _TYPE_wchar_t
#endif

/* In case nobody has defined these types, but we aren't running under
   GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE__TYPE__, and
   __WCHAR_TYPE__ have reasonable values.  This can happen if the
   parts of GCC is compiled by an older compiler, that actually
   include gstddef.h, such as collect2.  */

/* Signed type of difference of two pointers.  */

/* Define this type if we are doing the whole job,
   or if we want this type in particular.  */
#if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
#ifndef _PTRDIFF_T      /* in case <sys/types.h> has defined it. */
#ifndef _T_PTRDIFF_
#ifndef _T_PTRDIFF
#ifndef __PTRDIFF_T
#ifndef _PTRDIFF_T_
#ifndef _BSD_PTRDIFF_T_
#ifndef ___int_ptrdiff_t_h
#ifndef _GCC_PTRDIFF_T
#define _PTRDIFF_T
#define _T_PTRDIFF_
#define _T_PTRDIFF
#define __PTRDIFF_T
#define _PTRDIFF_T_
#define _BSD_PTRDIFF_T_
#define ___int_ptrdiff_t_h
#define _GCC_PTRDIFF_T
#ifndef __PTRDIFF_TYPE__
#define __PTRDIFF_TYPE__ long int
#endif
typedef __PTRDIFF_TYPE__ ptrdiff_t;
#endif /* _GCC_PTRDIFF_T */
#endif /* ___int_ptrdiff_t_h */
#endif /* _BSD_PTRDIFF_T_ */
#endif /* _PTRDIFF_T_ */
#endif /* __PTRDIFF_T */
#endif /* _T_PTRDIFF */
#endif /* _T_PTRDIFF_ */
#endif /* _PTRDIFF_T */

/* If this symbol has done its job, get rid of it.  */
#undef  __need_ptrdiff_t

#endif /* _STDDEF_H or __need_ptrdiff_t.  */

/* Unsigned type of `sizeof' something.  */

/* Define this type if we are doing the whole job,
   or if we want this type in particular.  */
#if defined (_STDDEF_H) || defined (__need_size_t)
#ifndef __size_t__      /* BeOS */
#ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
#ifndef _SYS_SIZE_T_H
#ifndef _T_SIZE_
#ifndef _T_SIZE
#ifndef __SIZE_T
#ifndef _SIZE_T_
#ifndef _BSD_SIZE_T_
#ifndef _SIZE_T_DEFINED_
#ifndef _SIZE_T_DEFINED
#ifndef ___int_size_t_h
#ifndef _GCC_SIZE_T
#ifndef _SIZET_
#ifndef __size_t
#define __size_t__      /* BeOS */
#define _SIZE_T
#define _SYS_SIZE_T_H
#define _T_SIZE_
#define _T_SIZE
#define __SIZE_T
#define _SIZE_T_
#define _BSD_SIZE_T_
#define _SIZE_T_DEFINED_
#define _SIZE_T_DEFINED
#define ___int_size_t_h
#define _GCC_SIZE_T
#define _SIZET_
#define __size_t
#ifndef __SIZE_TYPE__
#define __SIZE_TYPE__ long unsigned int
#endif
#if !(defined (__GNUG__) && defined (size_t))
typedef __SIZE_TYPE__ size_t;
#ifdef __BEOS__
typedef long ssize_t;
#endif /* __BEOS__ */
#endif /* !(defined (__GNUG__) && defined (size_t)) */
#endif /* __size_t */
#endif /* _SIZET_ */
#endif /* _GCC_SIZE_T */
#endif /* ___int_size_t_h */
#endif /* _SIZE_T_DEFINED */
#endif /* _SIZE_T_DEFINED_ */
#endif /* _BSD_SIZE_T_ */
#endif /* _SIZE_T_ */
#endif /* __SIZE_T */
#endif /* _T_SIZE */
#endif /* _T_SIZE_ */
#endif /* _SYS_SIZE_T_H */
#endif /* _SIZE_T */
#endif /* __size_t__ */
#undef  __need_size_t
#endif /* _STDDEF_H or __need_size_t.  */


/* Wide character type.
   Locale-writers should change this as necessary to
   be big enough to hold unique values not between 0 and 127,
   and not (wchar_t) -1, for each defined multibyte character.  */

/* Define this type if we are doing the whole job,
   or if we want this type in particular.  */
#if defined (_STDDEF_H) || defined (__need_wchar_t)
#ifndef __wchar_t__     /* BeOS */
#ifndef _WCHAR_T
#ifndef _T_WCHAR_
#ifndef _T_WCHAR
#ifndef __WCHAR_T
#ifndef _WCHAR_T_
#ifndef _BSD_WCHAR_T_
#ifndef _WCHAR_T_DEFINED_
#ifndef _WCHAR_T_DEFINED
#ifndef _WCHAR_T_H
#ifndef ___int_wchar_t_h
#ifndef __INT_WCHAR_T_H
#ifndef _GCC_WCHAR_T
#define __wchar_t__     /* BeOS */
#define _WCHAR_T
#define _T_WCHAR_
#define _T_WCHAR
#define __WCHAR_T
#define _WCHAR_T_
#define _BSD_WCHAR_T_
#define _WCHAR_T_DEFINED_
#define _WCHAR_T_DEFINED
#define _WCHAR_T_H
#define ___int_wchar_t_h
#define __INT_WCHAR_T_H
#define _GCC_WCHAR_T

/* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
   instead of _WCHAR_T_, and _BSD_RUNE_T_ (which, unlike the other
   symbols in the _FOO_T_ family, stays defined even after its
   corresponding type is defined).  If we define wchar_t, then we
   must undef _WCHAR_T_; for BSD/386 1.1 (and perhaps others), if
   we undef _WCHAR_T_, then we must also define rune_t, since 
   headers like runetype.h assume that if machine/ansi.h is included,
   and _BSD_WCHAR_T_ is not defined, then rune_t is available.
   machine/ansi.h says, "Note that _WCHAR_T_ and _RUNE_T_ must be of
   the same type." */
#ifdef _BSD_WCHAR_T_
#undef _BSD_WCHAR_T_
#ifdef _BSD_RUNE_T_
#if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
typedef _BSD_RUNE_T_ rune_t;
#endif
#endif
#endif

#ifndef __WCHAR_TYPE__
#ifdef __BEOS__
#define __WCHAR_TYPE__ unsigned char
#else
#define __WCHAR_TYPE__ int
#endif
#endif
#ifndef __cplusplus
typedef __WCHAR_TYPE__ wchar_t;
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif /* __wchar_t__ */
#undef  __need_wchar_t
#endif /* _STDDEF_H or __need_wchar_t.  */

#if defined (_STDDEF_H) || defined (__need_wint_t)
#ifndef _WINT_T
#define _WINT_T

#ifndef __WINT_TYPE__
#define __WINT_TYPE__ unsigned int
#endif
typedef __WINT_TYPE__ wint_t;
#endif
#undef __need_wint_t
#endif

/*  In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
    are already defined.  */
/*  BSD/OS 3.1 requires the MACHINE_ANSI_H check here.  FreeBSD 2.x apparently
    does not, even though there is a check for MACHINE_ANSI_H above.  */
#if defined(_ANSI_H_) || (defined(__bsdi__) && defined(_MACHINE_ANSI_H_))
/*  The references to _GCC_PTRDIFF_T_, _GCC_SIZE_T_, and _GCC_WCHAR_T_
    are probably typos and should be removed before 2.8 is released.  */
#ifdef _GCC_PTRDIFF_T_
#undef _PTRDIFF_T_
#undef _BSD_PTRDIFF_T_
#endif
#ifdef _GCC_SIZE_T_
#undef _SIZE_T_
#undef _BSD_SIZE_T_
#endif
#ifdef _GCC_WCHAR_T_
#undef _WCHAR_T_
#undef _BSD_WCHAR_T_
#endif
/*  The following ones are the real ones.  */
#ifdef _GCC_PTRDIFF_T
#undef _PTRDIFF_T_
#undef _BSD_PTRDIFF_T_
#endif
#ifdef _GCC_SIZE_T
#undef _SIZE_T_
#undef _BSD_SIZE_T_
#endif
#ifdef _GCC_WCHAR_T
#undef _WCHAR_T_
#undef _BSD_WCHAR_T_
#endif
#endif /* _ANSI_H_ || ( __bsdi__ && _MACHINE_ANSI_H_ ) */

#endif /* __sys_stdtypes_h */

/* A null pointer constant.  */

#if defined (_STDDEF_H) || defined (__need_NULL)
#undef NULL             /* in case <stdio.h> has defined it. */
#ifdef __GNUG__
#define NULL __null
#else   /* G++ */
#define NULL ((void *)0)
#endif  /* G++ */
#endif  /* NULL not defined and <stddef.h> or need NULL.  */
#undef  __need_NULL

#ifdef _STDDEF_H

/* Offset of member MEMBER in a struct of type TYPE.  */
#ifdef offsetof
#undef offsetof
#endif
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)

#endif /* _STDDEF_H was defined this time */

#endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
          || __need_XXX was not defined before */