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/*
* stdarg.h
*
* Provides facilities for stepping through a list of function arguments of
* an unknown number and type.
*
* NOTE: Gcc should provide stdarg.h, and I believe their version will work
* with crtdll. If necessary I think you can replace this with the GCC
* stdarg.h.
*
* Note that the type used in va_arg is supposed to match the actual type
* *after default promotions*. Thus, va_arg (..., short) is not valid.
*
* 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
* DISCLAMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* $Revision$
* $Author$
* $Date$
*
*/
#ifndef _STDARG_H_
#define _STDARG_H_
/* All the headers include this file. */
#include <_mingw.h>
/*
* Don't do any of this stuff for the resource compiler.
*/
#ifndef RC_INVOKED
/*
* I was told that Win NT likes this.
*/
#ifndef _VA_LIST_DEFINED
#define _VA_LIST_DEFINED
#endif
#ifndef _VA_LIST
#define _VA_LIST
typedef char* va_list;
#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))
/*
* Start variable argument list processing by setting AP to point to the
* argument after pN.
*/
#ifdef __GNUC__
/*
* In GNU the stack is not necessarily arranged very neatly in order to
* pack shorts and such into a smaller argument list. Fortunately a
* neatly arranged version is available through the use of __builtin_next_arg.
*/
#define va_start(ap, pN) \
((ap) = ((va_list) __builtin_next_arg(pN)))
#else
/*
* For a simple minded compiler this should work (it works in GNU too for
* vararg lists that don't follow shorts and such).
*/
#define va_start(ap, pN) \
((ap) = ((va_list) (&pN) + __va_argsiz(pN)))
#endif
/*
* End processing of variable argument list. In this case we do nothing.
*/
#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 _STDARG_H_ */
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