134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
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/***
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*varargs.h - XENIX style macros for variable argument functions
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file defines XENIX style macros for accessing arguments of a
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* function which takes a variable number of arguments.
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* [System V]
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*
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* [Public]
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*
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****/
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#pragma once
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#ifndef _INC_VARARGS
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#define _INC_VARARGS
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#if !defined (_WIN32)
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#error ERROR: Only Win32 target supported!
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#endif /* !defined (_WIN32) */
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#include <crtdefs.h>
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/*
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* Currently, all MS C compilers for Win32 platforms default to 8 byte
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* alignment.
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*/
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#pragma pack(push,_CRT_PACKING)
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#if __STDC__
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#error varargs.h incompatible with ANSI (use stdarg.h)
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#endif /* __STDC__ */
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#if !defined (_W64)
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#if !defined (__midl) && (defined (_X86_) || defined (_M_IX86))
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#define _W64 __w64
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#else /* !defined (__midl) && (defined (_X86_) || defined (_M_IX86)) */
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#define _W64
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#endif /* !defined (__midl) && (defined (_X86_) || defined (_M_IX86)) */
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#endif /* !defined (_W64) */
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#ifndef _UINTPTR_T_DEFINED
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#ifdef _WIN64
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typedef unsigned __int64 uintptr_t;
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#else /* _WIN64 */
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typedef _W64 unsigned int uintptr_t;
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#endif /* _WIN64 */
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#define _UINTPTR_T_DEFINED
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#endif /* _UINTPTR_T_DEFINED */
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#ifndef _VA_LIST_DEFINED
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#ifdef _M_CEE_PURE
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typedef System::ArgIterator va_list;
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#else /* _M_CEE_PURE */
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typedef char * va_list;
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#endif /* _M_CEE_PURE */
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#define _VA_LIST_DEFINED
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#endif /* _VA_LIST_DEFINED */
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#ifndef va_arg
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#if defined (_M_CEE)
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#error varargs.h not supported when targetting _M_CEE (use stdarg.h)
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#elif defined (_M_IX86)
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/*
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* define a macro to compute the size of a type, variable or expression,
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* rounded up to the nearest multiple of sizeof(int). This number is its
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* size as function argument (Intel architecture). Note that the macro
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* depends on sizeof(int) being a power of 2!
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*/
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_dcl va_list va_alist;
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#define va_start(ap) ap = (va_list)&va_alist
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#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
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#define va_end(ap) ap = (va_list)0
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#elif defined (_M_ARM)
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#define _VA_ALIGN 4
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#define _APALIGN(t,ap) ( ((va_list)0 - (ap)) & (__alignof(t) - 1) )
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#define va_dcl va_list va_alist;
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#define _SLOTSIZEOF(t) ( (sizeof(t) + _VA_ALIGN - 1) & ~(_VA_ALIGN - 1) )
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#define va_start(ap) ( ap = (va_list)&va_alist )
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#define va_arg(ap,t) (*(t *)((ap += _SLOTSIZEOF(t) + _APALIGN(t,ap)) \
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- _SLOTSIZEOF(t)))
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#define va_end(ap) ( ap = (va_list)0 )
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#elif defined (_M_X64)
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extern void __cdecl __va_start(va_list *, ...);
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#define va_dcl va_list va_alist;
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#define va_start(ap) ( __va_start(&ap, 0) )
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#define va_arg(ap, t) \
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( ( sizeof(t) > sizeof(__int64) || ( sizeof(t) & (sizeof(t) - 1) ) != 0 ) \
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? **(t **)( ( ap += sizeof(__int64) ) - sizeof(__int64) ) \
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: *(t *)( ( ap += sizeof(__int64) ) - sizeof(__int64) ) )
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#define va_end(ap) ( ap = (va_list)0 )
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#else /* defined (_M_X64) */
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/* A guess at the proper definitions for other platforms */
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_dcl va_list va_alist;
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#define va_start(ap) ap = (va_list)&va_alist
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#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
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#define va_end(ap) ap = (va_list)0
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#endif /* defined (_M_X64) */
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#endif /* va_arg */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#pragma pack(pop)
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#endif /* _INC_VARARGS */
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