81 lines
1.4 KiB
C
81 lines
1.4 KiB
C
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/***
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*stddef.h - definitions/declarations for common constants, types, variables
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*
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* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file contains definitions and declarations for some commonly
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* used constants, types, and variables.
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* [ANSI]
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*
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****/
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#ifndef _INC_STDDEF
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if (_MSC_VER <= 600)
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#define __cdecl _cdecl
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#define __far _far
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#define __near _near
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#endif
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/* define the NULL pointer value and the offsetof() macro */
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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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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/* offset of field m in a struct s */
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#define offsetof(s,m) (size_t)( (char *)&(((s *)0)->m) - (char *)0 )
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/* errno declaration */
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#ifdef _MT
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extern int __far * __cdecl __far volatile _errno(void);
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#define errno (*_errno())
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#else
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extern int __near __cdecl volatile errno;
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#endif
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/* define the implementation dependent size types */
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#ifndef _PTRDIFF_T_DEFINED
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typedef int ptrdiff_t;
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#define _PTRDIFF_T_DEFINED
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#endif
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#ifndef _SIZE_T_DEFINED
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typedef unsigned int size_t;
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#define _SIZE_T_DEFINED
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#endif
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#ifndef _WCHAR_T_DEFINED
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typedef unsigned short wchar_t;
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#define _WCHAR_T_DEFINED
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#endif
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#ifdef _MT
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/* define pointer to thread id value */
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extern int __far *_threadid;
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#endif
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#ifdef __cplusplus
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}
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#endif
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#define _INC_STDDEF
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#endif
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