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- /***
- *varargs.h - XENIX style macros for variable argument functions
- *
- * Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
- *
- *Purpose:
- * This file defines XENIX style macros for accessing arguments of a
- * function which takes a variable number of arguments.
- * [System V]
- *
- ****/
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #if defined(_DLL) && !defined(_MT)
- #error Cannot define _DLL without _MT
- #endif
-
- #if (defined(_MT) || defined(_WINDLL))
- #define _FARARG_ __far
- #else
- #define _FARARG_
- #endif
-
- #if (_MSC_VER <= 600)
- #define __far _far
- #endif
-
- #ifdef __STDC__
- #error varargs.h incompatible with ANSI (use stdarg.h)
- #endif
-
- #ifndef _VA_LIST_DEFINED
- typedef char _FARARG_ *va_list;
- #define _VA_LIST_DEFINED
- #endif
-
- /*
- * define a macro to compute the size of a type, variable or expression,
- * rounded up to the nearest multiple of sizeof(int). This number is its
- * size as function argument (Intel architecture). Note that the macro
- * depends on sizeof(int) being a power of 2!
- */
-
- #define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
-
- #define va_dcl va_list va_alist;
- #define va_start(ap) ap = (va_list)&va_alist
- #define va_arg(ap,t) ( *(t _FARARG_ *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
- #define va_end(ap) ap = (va_list)0
-
- #ifdef __cplusplus
- }
- #endif
-