266 lines
8.3 KiB
C
266 lines
8.3 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) 1985-2001, 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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*Revision History:
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* 08-22-88 GJF Modified to also work for the 386 (small model only)
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* 05-03-89 JCR Added _INTERNAL_IFSTRIP for relinc usage
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* 08-15-89 GJF Cleanup, now specific to OS/2 2.0 (i.e., 386 flat model)
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* 10-30-89 GJF Fixed copyright
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* 11-02-89 JCR Changed "DLL" to "_DLL"
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* 01-05-90 JCR Added NULL definition
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* 03-02-90 GJF Added #ifndef _INC_VARARGS stuff. Also, removed some
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* (now) useless preprocessor directives.
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* 05-29-90 GJF Replaced sizeof() with _INTSIZEOF() and revised the
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* va_arg() macro (fixes PTM 60)
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* 05-31-90 GJF Revised va_end() macro (propagated 5-25-90 change to
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* crt7 version by WAJ)
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* 01-24-91 JCR Generate an error on ANSI compilations
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* 08-20-91 JCR C++ and ANSI naming
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* 11-01-91 GDP MIPS Compiler support
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* 10-16-92 SKS Replaced "#ifdef i386" with "#ifdef _M_IX86".
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* 11-03-92 GJF Fixed several conditionals, dropped _DOSX32_ support.
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* 01-09-93 SRW Remove usage of MIPS and ALPHA to conform to ANSI
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* Use _MIPS_ and _ALPHA_ instead.
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* 10-04-93 SRW Fix ifdefs for MIPS and ALPHA to only check for _M_?????? defines
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* 10-13-93 GJF Merged NT and Cuda versions.
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* 04-05-94 SKS Add prototype of __builtin_va_start for ALPHA
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* 10-02-94 BWT PPC merge
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* 11-03-94 GJF Ensure 8 byte alignment.
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* 02-11-95 CFW Add _CRTBLD to avoid users getting wrong headers.
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* 02-14-95 CFW Clean up Mac merge.
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* 12-14-95 JWM Add "#pragma once".
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* 02-24-97 GJF Detab-ed.
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* 10-07-97 RDL Added IA64.
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* 11-07-97 RDL Soft23 varargs.
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* 05-17-99 PML Remove all Macintosh support.
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* 10-25-99 PML Fix IA64 _APALIGN macro (VS7#51838).
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* 10-25-99 PML Add support for _M_CEE (VS7#54572).
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* 01-20-00 PML Remove __epcg__.
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* 05-17-00 PML Use __alignof in _APALIGN macro for IA64.
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* 03-26-01 GB Added va_args for AMD64
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*
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****/
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#if _MSC_VER > 1000 /*IFSTRIP=IGN*/
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#pragma once
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#endif
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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
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#ifndef _CRTBLD
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/* This version of the header files is NOT for user programs.
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* It is intended for use when building the C runtimes ONLY.
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* The version intended for public use will not have this message.
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*/
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#error ERROR: Use of C runtime library internal header file.
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#endif /* _CRTBLD */
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#ifdef _MSC_VER
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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,8)
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#endif /* _MSC_VER */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if __STDC__
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#error varargs.h incompatible with ANSI (use stdarg.h)
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#endif
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#if !defined(_W64)
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#if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300 /*IFSTRIP=IGN*/
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#define _W64 __w64
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#else
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#define _W64
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#endif
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#endif
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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
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typedef _W64 unsigned int uintptr_t;
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#endif
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#define _UINTPTR_T_DEFINED
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#endif
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#ifndef _VA_LIST_DEFINED
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#ifdef _M_ALPHA
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typedef struct {
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char *a0; /* pointer to first homed integer argument */
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int offset; /* byte offset of next parameter */
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} va_list;
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#else
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typedef char *va_list;
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#endif
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#define _VA_LIST_DEFINED
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#endif
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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_MRX000) /* _MIPS_ */
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#define va_dcl int va_alist;
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#define va_start(list) list = (char *) &va_alist
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#define va_end(list)
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#define va_arg(list, mode) ((mode *)(list =\
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(char *) ((((int)list + (__builtin_alignof(mode)<=4?3:7)) &\
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(__builtin_alignof(mode)<=4?-4:-8))+sizeof(mode))))[-1]
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/* +++++++++++++++++++++++++++++++++++++++++++
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Because of parameter passing conventions in C:
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use mode=int for char, and short types
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use mode=double for float types
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use a pointer for array types
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+++++++++++++++++++++++++++++++++++++++++++ */
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#elif defined(_M_ALPHA)
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/*
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* The Alpha compiler supports two builtin functions that are used to
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* implement stdarg/varargs. The __builtin_va_start function is used
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* by va_start to initialize the data structure that locates the next
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* argument. The __builtin_isfloat function is used by va_arg to pick
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* which part of the home area a given register argument is stored in.
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* The home area is where up to six integer and/or six floating point
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* register arguments are stored down (so they can also be referenced
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* by a pointer like any arguments passed on the stack).
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*/
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extern void * __builtin_va_start(va_list, ...);
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#define va_dcl long va_alist;
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#define va_start(list) __builtin_va_start(list, va_alist, 0)
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#define va_end(list)
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#define va_arg(list, mode) \
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( *( ((list).offset += ((int)sizeof(mode) + 7) & -8) , \
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(mode *)((list).a0 + (list).offset - \
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((__builtin_isfloat(mode) && (list).offset <= (6 * 8)) ? \
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(6 * 8) + 8 : ((int)sizeof(mode) + 7) & -8) \
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) \
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) \
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)
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#elif defined(_M_PPC)
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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 (PPC 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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/* this is for LITTLE-ENDIAN PowerPC */
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/* bytes that a type occupies in the argument list */
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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/* return 'ap' adjusted for type 't' in arglist */
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#define _ALIGNIT(ap,t) \
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((((int)(ap))+(sizeof(t)<8?3:7)) & (sizeof(t)<8?~3:~7))
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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 = (char *) (_ALIGNIT(ap, t) + _INTSIZEOF(t))) - _INTSIZEOF(t)) )
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#define va_end(ap) ap = (va_list)0
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#elif defined(_M_IA64)
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#ifndef _VA_LIST
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#define _VA_LIST char*
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#endif
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typedef _VA_LIST va_list;
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#define _VA_STRUCT_ALIGN 16
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#define _VA_ALIGN 8
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#define _ALIGNOF(ap) ((((ap)+_VA_STRUCT_ALIGN - 1) & ~(_VA_STRUCT_ALIGN -1)) \
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- (ap))
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#define _APALIGN(t,ap) (__alignof(t) > 8 ? _ALIGNOF((uintptr_t) ap) : 0)
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#define _SLOTSIZEOF(t) ( (sizeof(t) + _VA_ALIGN - 1) & ~(_VA_ALIGN - 1) )
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#define va_dcl __int64 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 += _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_AMD64)
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extern void __cdecl __va_start(va_list *, ...);
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#define va_start(ap, x) ( __va_start(&ap, x) )
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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
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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
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#ifdef __cplusplus
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}
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#endif
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#ifdef _MSC_VER
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#pragma pack(pop)
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#endif /* _MSC_VER */
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#endif /* _INC_VARARGS */
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