[_ANSI_H_]: When undefing at the end, test _STDDEF_H, not __need_ptrdiff_t.

[thirdparty/gcc.git] / gcc / ginclude / stdarg.h

/* stdarg.h for GNU.
   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.  */

#ifndef _STDARG_H
#ifndef _ANSI_STDARG_H_
#ifndef __need___va_list
#define _STDARG_H
#define _ANSI_STDARG_H_
#endif /* not __need___va_list */
#undef __need___va_list

#ifndef __GNUC__
/* Use the system's macros with the system's compiler.
   This is relevant only when building GCC with some other compiler.  */
#include <stdarg.h>
#else
#ifdef __m88k__
#include <va-m88k.h>
#else
#ifdef __i860__
#include <va-i860.h>
#else
#ifdef __hppa__
#include <va-pa.h>
#else
#ifdef __mips__
#include <va-mips.h>
#else
#ifdef __sparc__
#include <va-sparc.h>
#else
#ifdef __i960__
#include <va-i960.h>
#else
#ifdef __alpha__
#include <va-alpha.h>
#else

/* Define __gnuc_va_list.  */

#ifndef __GNUC_VA_LIST
#define __GNUC_VA_LIST
#if defined(__svr4__) || defined(_AIX) || defined(_M_UNIX)
typedef char *__gnuc_va_list;
#else
typedef void *__gnuc_va_list;
#endif
#endif

/* Define the standard macros for the user,
   if this invocation was from the user program.  */
#ifdef _STDARG_H

/* Amount of space required in an argument list for an arg of type TYPE.
   TYPE may alternatively be an expression whose type is used.  */

#define __va_rounded_size(TYPE)  \
  (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))

#define va_start(AP, LASTARG) 						\
 (AP = ((__gnuc_va_list) __builtin_next_arg ()))

void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
#define va_end(AP)

/* We cast to void * and then to TYPE * because this avoids
   a warning about increasing the alignment requirement.  */
#define va_arg(AP, TYPE)						\
 (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),	\
  *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
#endif /* _STDARG_H */

#endif /* not alpha */
#endif /* not i960 */
#endif /* not sparc */
#endif /* not mips */
#endif /* not hppa */
#endif /* not i860 */
#endif /* not m88k */

#ifdef _STDARG_H
/* Define va_list, if desired, from __gnuc_va_list. */
/* We deliberately do not define va_list when called from
   stdio.h, because ANSI C says that stdio.h is not supposed to define
   va_list.  stdio.h needs to have access to that data type, 
   but must not use that name.  It should use the name __gnuc_va_list,
   which is safe because it is reserved for the implementation.  */

#ifdef _HIDDEN_VA_LIST  /* On OSF1, this means varargs.h is "half-loaded".  */
#undef _VA_LIST
#endif

#ifdef _BSD_VA_LIST
#undef _BSD_VA_LIST
#endif

#ifdef __SVR4_2__
/* SVR4.2 uses _VA_LIST for an internal alias for va_list,
   so we must avoid testing it and setting it here.  */
#ifndef _VA_LIST_
#define _VA_LIST_
typedef __gnuc_va_list va_list;
#endif /* _VA_LIST_ */
#else /* not __SVR4_2__ */

/* On 4.3bsd-net2, make sure ansi.h is included, so we have
   one less case to deal with in the following.  */
#if defined (__BSD_NET2__) || defined (____386BSD____)
#include <ansi.h>
#endif

/* In 4.3bsd-net2, machine/ansi.h defines these symbols, which remain
   defined as long as the corresponding type is *not* defined.  */
#ifdef _ANSI_H_
#ifndef _VA_LIST_
#define _VA_LIST
#endif
#undef _VA_LIST_
#endif /* _ANSI_H_ */

/* The macro _VA_LIST_ is the same thing used by this file in Ultrix.  */
#ifndef _VA_LIST_
/* The macro _VA_LIST is used in SCO Unix 3.2.  */
#ifndef _VA_LIST
#define _VA_LIST_
#define _VA_LIST
typedef __gnuc_va_list va_list;
#endif /* not _VA_LIST */
#endif /* not _VA_LIST_ */

/* On 4.3bsd-net2, leave _VA_LIST_ undef to indicate va_list is defined.  */
#ifdef _ANSI_H_
#undef _VA_LIST_
#endif

#endif /* not __SVR4_2__ */

#endif /* _STDARG_H */

#endif /* __GNUC__ */
#endif /* not _ANSI_STDARG_H_ */
#endif /* not _STDARG_H */