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@fcharlie fcharlie/vadefs.h
Created Apr 29, 2019

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vadefs.h
//
// vadefs.h
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// Definitions of macro helpers used by <stdarg.h>. This is the topmost header
// in the CRT header lattice, and is always the first CRT header to be included,
// explicitly or implicitly. Therefore, this header also has several definitions
// that are used throughout the CRT.
//
#pragma once
#define _INC_VADEFS
#define _CRT_PACKING 8
#pragma pack(push, _CRT_PACKING)
#ifdef __cplusplus
extern "C" {
#endif
#if !defined _W64
#define _W64
#endif
#ifndef _UINTPTR_T_DEFINED
#define _UINTPTR_T_DEFINED
#ifdef _WIN64
typedef unsigned __int64 uintptr_t;
#else
typedef unsigned int uintptr_t;
#endif
#endif
#ifndef _VA_LIST_DEFINED
#define _VA_LIST_DEFINED
#ifdef _M_CEE_PURE
typedef System::ArgIterator va_list;
#else
typedef char* va_list;
#endif
#endif
#ifdef __cplusplus
#define _ADDRESSOF(v) (&const_cast<char&>(reinterpret_cast<const volatile char&>(v)))
#else
#define _ADDRESSOF(v) (&(v))
#endif
#if (defined _M_ARM || defined _M_HYBRID_X86_ARM64) && !defined _M_CEE_PURE
#define _VA_ALIGN 4
#define _SLOTSIZEOF(t) ((sizeof(t) + _VA_ALIGN - 1) & ~(_VA_ALIGN - 1))
#define _APALIGN(t,ap) (((va_list)0 - (ap)) & (__alignof(t) - 1))
#elif defined _M_ARM64 && !defined _M_CEE_PURE
#define _VA_ALIGN 8
#define _SLOTSIZEOF(t) ((sizeof(t) + _VA_ALIGN - 1) & ~(_VA_ALIGN - 1))
#define _APALIGN(t,ap) (((va_list)0 - (ap)) & (__alignof(t) - 1))
#else
#define _SLOTSIZEOF(t) (sizeof(t))
#define _APALIGN(t,ap) (__alignof(t))
#endif
#if defined _M_CEE_PURE || (defined _M_CEE && !defined _M_ARM && !defined _M_ARM64)
void __cdecl __va_start(va_list*, ...);
void* __cdecl __va_arg(va_list*, ...);
void __cdecl __va_end(va_list*);
#define __crt_va_start_a(ap, v) ((void)(__va_start(&ap, _ADDRESSOF(v), _SLOTSIZEOF(v), __alignof(v), _ADDRESSOF(v))))
#define __crt_va_arg(ap, t) (*(t *)__va_arg(&ap, _SLOTSIZEOF(t), _APALIGN(t,ap), (t*)0))
#define __crt_va_end(ap) ((void)(__va_end(&ap)))
#elif defined _M_IX86 && !defined _M_HYBRID_X86_ARM64
#define _INTSIZEOF(n) ((sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1))
#define __crt_va_start_a(ap, v) ((void)(ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v)))
#define __crt_va_arg(ap, t) (*(t*)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)))
#define __crt_va_end(ap) ((void)(ap = (va_list)0))
#elif defined _M_ARM
#ifdef __cplusplus
void __cdecl __va_start(va_list*, ...);
#define __crt_va_start_a(ap, v) ((void)(__va_start(&ap, _ADDRESSOF(v), _SLOTSIZEOF(v), _ADDRESSOF(v))))
#else
#define __crt_va_start_a(ap, v) ((void)(ap = (va_list)_ADDRESSOF(v) + _SLOTSIZEOF(v)))
#endif
#define __crt_va_arg(ap, t) (*(t*)((ap += _SLOTSIZEOF(t) + _APALIGN(t,ap)) - _SLOTSIZEOF(t)))
#define __crt_va_end(ap) ((void)(ap = (va_list)0))
#elif defined _M_HYBRID_X86_ARM64
void __cdecl __va_start(va_list*, ...);
#define __crt_va_start_a(ap,v) ((void)(__va_start(&ap, _ADDRESSOF(v), _SLOTSIZEOF(v), __alignof(v), _ADDRESSOF(v))))
#define __crt_va_arg(ap, t) (*(t*)((ap += _SLOTSIZEOF(t)) - _SLOTSIZEOF(t)))
#define __crt_va_end(ap) ((void)(ap = (va_list)0))
#elif defined _M_ARM64
void __cdecl __va_start(va_list*, ...);
#define __crt_va_start_a(ap,v) ((void)(__va_start(&ap, _ADDRESSOF(v), _SLOTSIZEOF(v), __alignof(v), _ADDRESSOF(v))))
#define __crt_va_arg(ap, t) \
((sizeof(t) > (2 * sizeof(__int64))) \
? **(t**)((ap += sizeof(__int64)) - sizeof(__int64)) \
: *(t*)((ap += _SLOTSIZEOF(t) + _APALIGN(t,ap)) - _SLOTSIZEOF(t)))
#define __crt_va_end(ap) ((void)(ap = (va_list)0))
#elif defined _M_X64
void __cdecl __va_start(va_list* , ...);
#define __crt_va_start_a(ap, x) ((void)(__va_start(&ap, x)))
#define __crt_va_arg(ap, t) \
((sizeof(t) > sizeof(__int64) || (sizeof(t) & (sizeof(t) - 1)) != 0) \
? **(t**)((ap += sizeof(__int64)) - sizeof(__int64)) \
: *(t* )((ap += sizeof(__int64)) - sizeof(__int64)))
#define __crt_va_end(ap) ((void)(ap = (va_list)0))
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#if defined __cplusplus && !defined _CRT_NO_VA_START_VALIDATION
extern "C++"
{
template <typename _Ty>
struct __vcrt_va_list_is_reference
{
enum : bool { __the_value = false };
};
template <typename _Ty>
struct __vcrt_va_list_is_reference<_Ty&>
{
enum : bool { __the_value = true };
};
template <typename _Ty>
struct __vcrt_va_list_is_reference<_Ty&&>
{
enum : bool { __the_value = true };
};
template <typename _Ty>
struct __vcrt_assert_va_start_is_not_reference
{
static_assert(!__vcrt_va_list_is_reference<_Ty>::__the_value,
"va_start argument must not have reference type and must not be parenthesized");
};
} // extern "C++"
#define __crt_va_start(ap, x) ((void)(__vcrt_assert_va_start_is_not_reference<decltype(x)>(), __crt_va_start_a(ap, x)))
#else // ^^^ __cplusplus ^^^ // vvv !__cplusplus vvv //
#define __crt_va_start(ap, x) __crt_va_start_a(ap, x)
#endif
#pragma pack(pop)
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