include/stdarg.h

   1 #ifndef _STDARG_H
   2 #define _STDARG_H
   3
   4 #ifdef __x86_64__
   5 #ifndef _WIN64
   6
   7 typedef void *va_list;
   8
   9 va_list __va_start(void *fp);
  10 void *__va_arg(va_list ap, int arg_type, int size, int align);
  11 va_list __va_copy(va_list src);
  12 void __va_end(va_list ap);
  13
  14 #define va_start(ap, last) ((ap) = __va_start(__builtin_frame_address(0)))
  15 #define va_arg(ap, type)                                                \
  16     (*(type *)(__va_arg(ap, __builtin_va_arg_types(type), sizeof(type), __alignof__(type))))
  17 #define va_copy(dest, src) ((dest) = __va_copy(src))
  18 #define va_end(ap) __va_end(ap)
  19
  20 #else /* _WIN64 */
  21 typedef char *va_list;
  22 #define va_start(ap,last) __builtin_va_start(ap,last)
  23 #define va_arg(ap,type) (ap += 8, sizeof(type)<=8 ? *(type*)ap : **(type**)ap)
  24 #define va_copy(dest, src) ((dest) = (src))
  25 #define va_end(ap)
  26 #endif
  27
  28 #else /* __i386__ */
  29 typedef char *va_list;
  30 /* only correct for i386 */
  31 #define va_start(ap,last) ap = ((char *)&(last)) + ((sizeof(last)+3)&~3)
  32 #define va_arg(ap,type) (ap += (sizeof(type)+3)&~3, *(type *)(ap - ((sizeof(type)+3)&~3)))
  33 #define va_copy(dest, src) (dest) = (src)
  34 #define va_end(ap)
  35 #endif
  36
  37 /* fix a buggy dependency on GCC in libio.h */
  38 typedef va_list __gnuc_va_list;
  39 #define _VA_LIST_DEFINED
  40
  41 #endif /* _STDARG_H */