stdarg.h

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#pragma once
 
typedef char *va_list;
 
#define va_item int
 
#define va_size(t) \
    (((sizeof(t) + sizeof(va_item) - 1) / sizeof(va_item)) * sizeof(va_item))
 
#define va_start(ap, last_arg) (ap = ((va_list)(&last_arg) + va_size(last_arg)))
#define va_end(ap) ((void)0)
 
#define va_arg(ap, t) (ap += va_size(t), *((t *)(ap - va_size(t))))