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/*
* varargs.h
*
* Old, non-ANSI facilities for stepping through a list of function
* arguments of an unknown number and type.
* TODO: Has not been tested. Essentially it copies the GCC version.
*
* NOTE: I believe GCC supplies a version of this header as well (in
* addition to stdarg.h and others). The GCC version is more
* complex, to deal with many alternate systems, but it is
* probably more trustworthy overall. It would probably be
* better to use the GCC version.
*
* NOTE: These are incompatible with the versions in stdarg.h and should
* NOT be mixed! All new code should use the ANSI compatible versions.
*
* This file is part of the Mingw32 package.
*
* Contributors:
* Created by Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
*
* THIS SOFTWARE IS NOT COPYRIGHTED
*
* This source code is offered for use in the public domain. You may
* use, modify or distribute it freely.
*
* This code is distributed in the hope that it will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAIMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* $Revision$
* $Author$
* $Date$
*
*/
#ifndef __STRICT_ANSI__
#ifndef _VARARGS_H_
#define _VARARGS_H_
/* All the headers include this file. */
#include <_mingw.h>
/*
* I was told that Win NT likes this.
*/
#ifndef _VA_LIST_DEFINED
#define _VA_LIST_DEFINED
#endif
#ifndef RC_INVOKED
#ifndef _VA_LIST
#define _VA_LIST
#if defined __GNUC__ && __GNUC__ >= 3
typedef __builtin_va_list va_list;
#else
typedef char* va_list;
#endif
#endif
/*
* Amount of space required in an argument list (ie. the stack) for an
* argument of type t.
*/
#define __va_argsiz(t) \
(((sizeof(t) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
#define va_alist __builtin_va_alist
/*
* Used in old style argument lists IIRC. The ellipsis forces the compiler
* to realize this is a vararg function.
*/
#define va_dcl int __builtin_va_alist; ...
#define va_start(ap) \
((ap) = ((va_list) &__builtin_va_alist))
#define va_end(ap) ((void)0)
/*
* Increment ap to the next argument in the list while returing a
* pointer to what ap pointed to first, which is of type t.
*
* We cast to void* and then to t* because this avoids a warning about
* increasing the alignment requirement.
*/
#define va_arg(ap, t) \
(((ap) = (ap) + __va_argsiz(t)), \
*((t*) (void*) ((ap) - __va_argsiz(t))))
#endif /* Not RC_INVOKED */
#endif /* Not _VARARGS_H_ */
#endif /* Not __STRICT_ANSI__ */
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