// Copyright (c) 2025, Zak Fenton
// Zak Fenton's libc is licensed under the Mulan PSL v2. You can use this
// software according to the terms and conditions of the Mulan PSL v2.
// You may obtain a copy of Mulan PSL v2 at:
// http://license.coscl.org.cn/MulanPSL2
// THIS SOFTWARE IS PROVIDED ON AN “AS IS” BASIS, WITHOUT warranties of
// any kind, either express or implied, including but not limited to
// non-infringement, merchantability or fit for a particular purpose.
// See the Mulan PSL v2 for more details.

#ifndef _LIBC_STDARG_H
#define _LIBC_STDARG_H

#ifdef _ZCC

typedef long long** va_list;

#define _VA_CHECK() \
  if (__builtin_func_callconv != 101) {\
    printf("ERROR: Unpacking varargs currently only works with __classic_call (#101). Function %s uses convention %d instead.\n", __func__, __builtin_func_callconv);\
  }

#define va_start(list,lastarg) \
  do {\
    _VA_CHECK();\
    list = &lastarg;\
    list++;\
  } while(0)

#define va_arg(list,T) \
  (*((T*)(list++)))
  
#define va_end(list) \
  do {list = (void*)0;} while(0)
  
/* Not new C compiler, use GCC ABI */
#else
#define va_list __builtin_va_list
#define va_start __builtin_va_start
#define va_end __builtin_va_end
#define va_arg __builtin_va_arg
#endif

/* From ifndef at top of file: */
#endif