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Diffstat (limited to '')
| -rw-r--r-- | public/sdk/inc/crt/varargs.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/public/sdk/inc/crt/varargs.h b/public/sdk/inc/crt/varargs.h new file mode 100644 index 000000000..e2bb22d07 --- /dev/null +++ b/public/sdk/inc/crt/varargs.h @@ -0,0 +1,163 @@ +/*** +*varargs.h - XENIX style macros for variable argument functions +* +* Copyright (c) 1985-1995, Microsoft Corporation. All rights reserved. +* +*Purpose: +* This file defines XENIX style macros for accessing arguments of a +* function which takes a variable number of arguments. +* [System V] +* +* [Public] +* +****/ + +#if _MSC_VER > 1000 +#pragma once +#endif + +#ifndef _INC_VARARGS +#define _INC_VARARGS + +#if !defined(_WIN32) && !defined(_MAC) +#error ERROR: Only Mac or Win32 targets supported! +#endif + + +#ifdef _MSC_VER +/* + * Currently, all MS C compilers for Win32 platforms default to 8 byte + * alignment. + */ +#pragma pack(push,8) +#endif /* _MSC_VER */ + +#ifdef __cplusplus +extern "C" { +#endif + +#if __STDC__ +#error varargs.h incompatible with ANSI (use stdarg.h) +#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 + + +#if defined(_M_IX86) + +/* + * define a macro to compute the size of a type, variable or expression, + * rounded up to the nearest multiple of sizeof(int). This number is its + * size as function argument (Intel architecture). Note that the macro + * depends on sizeof(int) being a power of 2! + */ +#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) ) + +#define va_dcl va_list va_alist; +#define va_start(ap) ap = (va_list)&va_alist +#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) +#define va_end(ap) ap = (va_list)0 + + +#elif defined(_M_MRX000) /* _MIPS_ */ + + +#define va_dcl int va_alist; +#define va_start(list) list = (char *) &va_alist +#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) + +/* + * 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, ...); + +#define va_dcl long va_alist; +#define va_start(list) __builtin_va_start(list, va_alist, 0) +#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) \ + ) \ + ) \ + ) + + +#elif defined(_M_PPC) + +/* + * define a macro to compute the size of a type, variable or expression, + * rounded up to the nearest multiple of sizeof(int). This number is its + * size as function argument (PPC architecture). Note that the macro + * depends on sizeof(int) being a power of 2! + */ +/* this is for LITTLE-ENDIAN PowerPC */ + +/* 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)) + +#define va_dcl va_list va_alist; +#define va_start(ap) ap = (va_list)&va_alist +#define va_arg(ap,t) ( *(t *)((ap = (char *) (_ALIGNIT(ap, t) + _INTSIZEOF(t))) - _INTSIZEOF(t)) ) +#define va_end(ap) ap = (va_list)0 + +#else + +/* A guess at the proper definitions for other platforms */ + +#define _INTSIZEOF(n) ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) ) + +#define va_dcl va_list va_alist; +#define va_start(ap) ap = (va_list)&va_alist +#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) ) +#define va_end(ap) ap = (va_list)0 + + +#endif + + +#ifdef __cplusplus +} +#endif + +#ifdef _MSC_VER +#pragma pack(pop) +#endif /* _MSC_VER */ + +#endif /* _INC_VARARGS */ |