#ifndef _STDARG_H#define _STDARG_H #ifdef __x86_64__#ifndef _WIN64 typedef void *va_list; va_list __va_start(void *fp);void *__va_arg(va_list ap, int arg_type, int size);va_list __va_copy(va_list src);void __va_end(va_list ap); #define va_start(ap, last) ((ap) = __va_start(__builtin_frame_address(0)))#define va_arg(ap, type)                                                \    (*(type *)(__va_arg(ap, __builtin_va_arg_types(type), sizeof(type))))#define va_copy(dest, src) ((dest) = __va_copy(src))#define va_end(ap) __va_end(ap) #else /* _WIN64 */typedef char *va_list;#define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+7)&~7)#define va_arg(ap,type) (ap += (sizeof(type)+7)&~7, *(type *)(ap - ((sizeof(type)+7)&~7)))#define va_copy(dest, src) (dest) = (src)#define va_end(ap)#endif #else /* __i386__ */typedef char *va_list;/* only correct for i386 */#define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)#define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))#define va_copy(dest, src) (dest) = (src)#define va_end(ap)#endif /* fix a buggy dependency on GCC in libio.h */typedef va_list __gnuc_va_list;#define _VA_LIST_DEFINED #endif /* _STDARG_H */