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  1. /*===---- stdarg.h - Variable argument handling ----------------------------===
  2.  *
  3.  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4.  * See https://llvm.org/LICENSE.txt for license information.
  5.  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6.  *
  7.  *===-----------------------------------------------------------------------===
  8.  */
  9.  
  10. #ifndef __STDARG_H
  11.  
  12. #ifndef __GNUC_VA_LIST
  13. #define __GNUC_VA_LIST
  14. typedef __builtin_va_list __gnuc_va_list;
  15. #endif
  16.  
  17. #ifdef __need___va_list
  18. #undef __need___va_list
  19. #else
  20. #define __STDARG_H
  21. #ifndef _VA_LIST
  22. typedef __builtin_va_list va_list;
  23. #define _VA_LIST
  24. #endif
  25.  
  26. /* FIXME: This is using the placeholder dates Clang produces for these macros
  27.    in C2x mode; switch to the correct values once they've been published. */
  28. #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202000L
  29. /* C2x does not require the second parameter for va_start. */
  30. #define va_start(ap, ...) __builtin_va_start(ap, 0)
  31. #else
  32. /* Versions before C2x do require the second parameter. */
  33. #define va_start(ap, param) __builtin_va_start(ap, param)
  34. #endif
  35. #define va_end(ap)          __builtin_va_end(ap)
  36. #define va_arg(ap, type)    __builtin_va_arg(ap, type)
  37.  
  38. /* GCC always defines __va_copy, but does not define va_copy unless in c99 mode
  39.  * or -ansi is not specified, since it was not part of C90.
  40.  */
  41. #define __va_copy(d,s) __builtin_va_copy(d,s)
  42.  
  43. #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) ||              \
  44.     (defined(__cplusplus) && __cplusplus >= 201103L) ||                        \
  45.     !defined(__STRICT_ANSI__)
  46. #define va_copy(dest, src)  __builtin_va_copy(dest, src)
  47. #endif
  48.  
  49. #endif /* __STDARG_H */
  50.  
  51. #endif /* not __STDARG_H */
  52.