clang/lib/Headers/stdarg.h

   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 */