117 lines
3 KiB
C
117 lines
3 KiB
C
|
/***
|
||
|
|
*stdarg.h - defines ANSI-style macros for variable argument functions
|
||
|
|
*
|
||
|
|
* Copyright (c) 1985-1994, 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]
|
||
|
|
*
|
||
|
|
****/
|
||
|
|
|
||
|
|
#ifndef _INC_STDARG
|
||
|
|
#define _INC_STDARG
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#ifdef _M_IX86
|
||
|
|
|
||
|
|
|
||
|
|
#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
|
||
|
|
|
||
|
|
#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 )
|
||
|
|
|
||
|
|
|
||
|
|
#elif defined(_M_MRX000)
|
||
|
|
|
||
|
|
|
||
|
|
/* Use these types and definitions if generating code for MIPS */
|
||
|
|
|
||
|
|
#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]
|
||
|
|
|
||
|
|
/* +++++++++++++++++++++++++++++++++++++++++++
|
||
|
|
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
|
||
|
|
+++++++++++++++++++++++++++++++++++++++++++ */
|
||
|
|
|
||
|
|
|
||
|
|
#elif defined(_M_ALPHA)
|
||
|
|
|
||
|
|
|
||
|
|
/* Use these types and definitions if generating code for ALPHA */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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).
|
||
|
|
*/
|
||
|
|
|
||
|
|
extern void * __builtin_va_start(va_list, ...);
|
||
|
|
|
||
|
|
#ifdef _CFRONT
|
||
|
|
#define __builtin_isfloat(a) __builtin_alignof(a)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#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) \
|
||
|
|
) \
|
||
|
|
) \
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
|
||
|
|
/* A guess at the proper definitions for other platforms */
|
||
|
|
|
||
|
|
#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
|
||
|
|
|
||
|
|
#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 )
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _INC_STDARG */
|