stddef.h

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/***
*stddef.h - definitions/declarations for common constants, types, variables
*
*       Copyright (c) 1985-1999, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file contains definitions and declarations for some commonly
*       used constants, types, and variables.
*       [ANSI]
*
*       [Public]
*
****/

#if     _MSC_VER > 1000
#pragma once
#endif

#ifndef _INC_STDDEF
#define _INC_STDDEF

#if     !defined(_WIN32)
#error ERROR: Only Win32 target supported!
#endif


#ifdef  __cplusplus
extern "C" {
#endif



/* Define _CRTIMP */

#ifndef _CRTIMP
#ifdef  _DLL
#define _CRTIMP __declspec(dllimport)
#else   /* ndef _DLL */
#define _CRTIMP
#endif  /* _DLL */
#endif  /* _CRTIMP */

/* Define __cdecl for non-Microsoft compilers */

#if     ( !defined(_MSC_VER) && !defined(__cdecl) )
#define __cdecl
#endif


/* Define NULL pointer value */

#ifndef NULL
#ifdef  __cplusplus
#define NULL    0
#else
#define NULL    ((void *)0)
#endif
#endif


/* Declare reference to errno */

#if     defined(_MT) || defined(_DLL)
_CRTIMP extern int * __cdecl _errno(void);
#define errno   (*_errno())
#else   /* ndef _MT && ndef _DLL */
_CRTIMP extern int errno;
#endif  /* _MT || _DLL */


/* Define the implementation dependent size types */

#ifndef _INTPTR_T_DEFINED
#ifdef  _WIN64
typedef __int64             intptr_t;
#else
typedef int                 intptr_t;
#endif
#define _INTPTR_T_DEFINED
#endif

#ifndef _UINTPTR_T_DEFINED
#ifdef  _WIN64
typedef unsigned __int64    uintptr_t;
#else
typedef unsigned int        uintptr_t;
#endif
#define _UINTPTR_T_DEFINED
#endif

#ifndef _PTRDIFF_T_DEFINED
#ifdef  _WIN64
typedef __int64             ptrdiff_t;
#else
typedef int                 ptrdiff_t;
#endif
#define _PTRDIFF_T_DEFINED
#endif


#ifndef _SIZE_T_DEFINED
#ifdef  _WIN64
typedef unsigned __int64 size_t;
#else
typedef unsigned int     size_t;
#endif
#define _SIZE_T_DEFINED
#endif


#ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;
#define _WCHAR_T_DEFINED
#endif

/* Define offsetof macro */
#define offsetof(s,m)   ((size_t)&(((s *)0)->m))

#ifdef  _MT
_CRTIMP extern unsigned long  __cdecl __threadid(void);
#define _threadid       (__threadid())
_CRTIMP extern uintptr_t __cdecl __threadhandle(void);
#endif


#ifdef  __cplusplus
}
#endif

#endif  /* _INC_STDDEF */