include/msvcrt/vadefs.h

   1 /*
   2  * Variable argument definitions
   3  *
   4  * Copyright 2022 Jacek Caban
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef _INC_VADEFS
  22 #define _INC_VADEFS
  23
  24 #include <corecrt.h>
  25
  26 #ifdef __cplusplus
  27 #define _ADDRESSOF(v) (&reinterpret_cast<const char &>(v))
  28 #else
  29 #define _ADDRESSOF(v) (&(v))
  30 #endif
  31
  32 #if defined (__GNUC__) && (defined(__x86_64__) || (defined(__aarch64__) && __has_attribute(ms_abi)))
  33
  34 typedef __builtin_ms_va_list va_list;
  35 #define _crt_va_start(v,l)  __builtin_ms_va_start(v,l)
  36 #define _crt_va_arg(v,l)    __builtin_va_arg(v,l)
  37 #define _crt_va_end(v)      __builtin_ms_va_end(v)
  38 #define _crt_va_copy(d,s)   __builtin_ms_va_copy(d,s)
  39
  40 #elif defined(__GNUC__) || defined(__clang__)
  41
  42 typedef __builtin_va_list va_list;
  43 #define _crt_va_start(v,l)  __builtin_va_start(v,l)
  44 #define _crt_va_arg(v,l)    __builtin_va_arg(v,l)
  45 #define _crt_va_end(v)      __builtin_va_end(v)
  46 #define _crt_va_copy(d,s)   __builtin_va_copy(d,s)
  47
  48 #else
  49
  50 typedef char *va_list;
  51
  52 #if defined(__i386__)
  53 #define _INTSIZEOF(n) ((sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1))
  54 #define _crt_va_start(v,l)  ((v) = (va_list)_ADDRESSOF(l) + _INTSIZEOF(l))
  55 #define _crt_va_arg(v,l)    (*(l *)(((v) += _INTSIZEOF(l)) - _INTSIZEOF(l)))
  56 #define _crt_va_end(v)      ((v) = (va_list)0)
  57 #define _crt_va_copy(d,s)   ((d) = (s))
  58 #endif
  59
  60 #endif
  61
  62 #endif /* _INC_VADEFS */