stdarg.h

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/***************************************************************************//**
    @file   stdarg.h
 
    @brief  Declares a type and macros for advancing through a list of arguments
*******************************************************************************/
#ifndef _STDARG_H
#define _STDARG_H
 
/* 
 * A type suitable for holding information needed by the macros va_start,
 * va_arg, and va_end
 */
typedef __builtin_va_list va_list;
 
/*
 * va_start initializes ap for subsequent use by va_arg and va_end and shall be
 * invoked prior to any access to the unnamed arguments
 */
#define va_start(ap, parmN) __builtin_va_start((ap), (parmN))
 
/*
 * va_arg expands to an expression that has the type and value of the next
 * argument in the call
 */
#define va_arg(ap, type)    __builtin_va_arg((ap), type)
 
/*
 * va_end facilitates a normal return from the function whose variable argument
 * list was referred to by the expansion of va_start that initialized the
 * va_list ap
 */
#define va_end(ap)          __builtin_va_end((ap))
 
#endif /* _STDARG_H */