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/*** |
*stdarg.h - defines ANSI-style macros for variable argument functions |
* |
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved. |
* |
*Purpose: |
* This file defines ANSI-style macros for accessing arguments |
* of functions which take a variable number of arguments. |
* [ANSI] |
* |
* [Public] |
* |
****/ |
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#if _MSC_VER > 1000 |
#pragma once |
#endif |
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#ifndef _INC_STDARG |
#define _INC_STDARG |
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#if !defined(_WIN32) && !defined(_MAC) |
#error ERROR: Only Mac or Win32 targets supported! |
#endif |
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#ifdef _MSC_VER |
/* |
* Currently, all MS C compilers for Win32 platforms default to 8 byte |
* alignment. |
*/ |
#pragma pack(push,8) |
#endif /* _MSC_VER */ |
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#ifdef __cplusplus |
extern "C" { |
#endif |
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#ifndef _VA_LIST_DEFINED |
#ifdef _M_ALPHA |
typedef struct { |
char *a0; /* pointer to first homed integer argument */ |
int offset; /* byte offset of next parameter */ |
} va_list; |
#else |
typedef char * va_list; |
#endif |
#define _VA_LIST_DEFINED |
#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) ) |
#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) |
#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) |
#define va_end(list) |
#define va_arg(list, mode) ((mode *)(list =\ |
(char *) ((((int)list + (__builtin_alignof(mode)<=4?3:7)) &\ |
(__builtin_alignof(mode)<=4?-4:-8))+sizeof(mode))))[-1] |
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/* +++++++++++++++++++++++++++++++++++++++++++ |
Because of parameter passing conventions in C: |
use mode=int for char, and short types |
use mode=double for float types |
use a pointer for array types |
+++++++++++++++++++++++++++++++++++++++++++ */ |
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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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/* |
* The Alpha compiler supports two builtin functions that are used to |
* implement stdarg/varargs. The __builtin_va_start function is used |
* by va_start to initialize the data structure that locates the next |
* argument. The __builtin_isfloat function is used by va_arg to pick |
* which part of the home area a given register argument is stored in. |
* The home area is where up to six integer and/or six floating point |
* register arguments are stored down (so they can also be referenced |
* by a pointer like any arguments passed on the stack). |
*/ |
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extern void * __builtin_va_start(va_list, ...); |
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#ifdef _CFRONT |
#define __builtin_isfloat(a) __builtin_alignof(a) |
#endif |
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#define va_start(list, v) __builtin_va_start(list, v, 1) |
#define va_end(list) |
#define va_arg(list, mode) \ |
( *( ((list).offset += ((int)sizeof(mode) + 7) & -8) , \ |
(mode *)((list).a0 + (list).offset - \ |
((__builtin_isfloat(mode) && (list).offset <= (6 * 8)) ? \ |
(6 * 8) + 8 : ((int)sizeof(mode) + 7) & -8) \ |
) \ |
) \ |
) |
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#elif defined(_M_PPC) |
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/* Microsoft C8 front end (used in Motorola Merged compiler) */ |
/* bytes that a type occupies in the argument list */ |
#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) ) |
/* return 'ap' adjusted for type 't' in arglist */ |
#define _ALIGNIT(ap,t) \ |
((((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) ) |
#define va_arg(ap,t) ( *(t *)((ap = (char *) (_ALIGNIT(ap, t) + _INTSIZEOF(t))) - _INTSIZEOF(t)) ) |
#define va_end(ap) ( ap = (va_list)0 ) |
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#elif defined(_M_M68K) |
#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)) ) |
#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) |
#define va_end(ap) ( ap = (va_list)0 ) |
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#elif defined(_M_MPPC) |
#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) ) |
#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) |
#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) ) |
#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) |
#define va_end(ap) ( ap = (va_list)0 ) |
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#endif |
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#ifdef __cplusplus |
} |
#endif |
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#ifdef _MSC_VER |
#pragma pack(pop) |
#endif /* _MSC_VER */ |
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#endif /* _INC_STDARG */ |