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/*
* @(#) stdarg.h 1.2 91/11/30 21:10:39
*
* Sample stdarg.h file for use with the unproto filter.
*
* This file serves two purposes.
*
* 1 - As an include file for use with ANSI-style C source that implements
* variadic functions.
*
* 2 - To configure the unproto filter itself. If the _VA_ALIST_ macro is
* defined, its value will appear in the place of the "..." in argument
* lists of variadic function *definitions* (not declarations).
*
* Compilers that pass arguments via the stack can use the default code at the
* end of this file (this usually applies for the VAX, MC68k and 80*86
* architectures).
*
* RISC-based systems often need special tricks. An example of the latter is
* given for the SPARC architecture. Read your /usr/include/varargs.h for
* more information.
*
* You can use the varargs.c program provided with the unproto package to
* verify that the stdarg.h file has been set up correctly.
*/
#ifdef sparc
# define _VA_ALIST_ "__builtin_va_alist"
typedef char *va_list;
# define va_start(ap, p) (ap = (char *) &__builtin_va_alist)
# define va_arg(ap, type) ((type *) __builtin_va_arg_incr((type *) ap))[0]
# define va_end(ap)
#else /* vax, mc68k, 80*86 */
typedef char *va_list;
# define va_start(ap, p) (ap = (char *) (&(p)+1))
# define va_arg(ap, type) ((type *) (ap += sizeof(type)))[-1]
# define va_end(ap)
#endif
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