53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/***
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*varargs.h - XENIX style macros for variable argument functions
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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 defines XENIX style macros for accessing arguments of a
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* function which takes a variable number of arguments.
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* [System V]
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*
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****/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _WINDLL
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#define _FARARG_ __far
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#else
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#define _FARARG_
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#endif
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#if (_MSC_VER <= 600)
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#define __far _far
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#endif
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#ifdef __STDC__
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#error varargs.h incompatible with ANSI (use stdarg.h)
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#endif
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#ifndef _VA_LIST_DEFINED
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typedef char _FARARG_ *va_list;
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#define _VA_LIST_DEFINED
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#endif
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/*
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* define a macro to compute the size of a type, variable or expression,
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* rounded up to the nearest multiple of sizeof(int). This number is its
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* size as function argument (Intel architecture). Note that the macro
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* depends on sizeof(int) being a power of 2!
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*/
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_dcl va_list va_alist;
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#define va_start(ap) ap = (va_list)&va_alist
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#define va_arg(ap,t) ( *(t _FARARG_ *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
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#define va_end(ap) ap = (va_list)0
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#ifdef __cplusplus
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}
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#endif
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