forked from KolibriOS/kolibrios
164 lines
4.7 KiB
C
164 lines
4.7 KiB
C
/***
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*stdarg.h - defines ANSI-style macros for variable argument functions
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*
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* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file defines ANSI-style macros for accessing arguments
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* of functions which take a variable number of arguments.
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* [ANSI]
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*
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* [Public]
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*
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****/
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#if _MSC_VER > 1000
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#pragma once
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#endif
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#ifndef _INC_STDARG
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#define _INC_STDARG
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#if !defined(_WIN32) && !defined(_MAC)
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#error ERROR: Only Mac or Win32 targets supported!
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#endif
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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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#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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#ifdef _M_IX86
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_start(ap,v) ( ap = (va_list)&v + _INTSIZEOF(v) )
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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)
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/* Use these types and definitions if generating code for MIPS */
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#define va_start(ap,v) ap = (va_list)&v + sizeof(v)
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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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/* Use these types and definitions if generating code for 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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#ifdef _CFRONT
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#define __builtin_isfloat(a) __builtin_alignof(a)
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#endif
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#define va_start(list, v) __builtin_va_start(list, v, 1)
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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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/* Microsoft C8 front end (used in Motorola Merged compiler) */
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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_start(ap,v) ( ap = (va_list)&v + _INTSIZEOF(v) )
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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_M68K)
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_start(ap,v) ( ap = (va_list)&v + (sizeof(v) < sizeof(int) ? sizeof(v) : _INTSIZEOF(v)) )
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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_MPPC)
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#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
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#define va_start(ap,v) ( ap = (va_list)&v + _INTSIZEOF(v) )
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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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#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_start(ap,v) ( ap = (va_list)&v + _INTSIZEOF(v) )
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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_STDARG */
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