ReactOS
0.4.16-dev-303-g11d5cb8
varargs.h
Go to the documentation of this file.
1
/* @(#)varargs.h 1.8 14/01/06 Copyright 1998-2014 J. Schilling */
2
/*
3
* Generic header for users of var args ...
4
*
5
* Includes a default definition for va_copy()
6
* and some magic know how about the SVr4 Power PC var args ABI
7
* to create a __va_arg_list() macro.
8
*
9
* The __va_arg_list() macro is needed to fetch a va_list type argument
10
* from a va_list. This is needed to implement a recursive "%r" printf.
11
*
12
* Copyright (c) 1998-2014 J. Schilling
13
*/
14
/*
15
* The contents of this file are subject to the terms of the
16
* Common Development and Distribution License, Version 1.0 only
17
* (the "License"). You may not use this file except in compliance
18
* with the License.
19
*
20
* See the file CDDL.Schily.txt in this distribution for details.
21
* A copy of the CDDL is also available via the Internet at
22
* http://www.opensource.org/licenses/cddl1.txt
23
*
24
* When distributing Covered Code, include this CDDL HEADER in each
25
* file and include the License file CDDL.Schily.txt from this distribution.
26
*/
27
28
#ifndef _SCHILY_VARARGS_H
29
#define _SCHILY_VARARGS_H
30
31
#ifndef _SCHILY_MCONFIG_H
32
#include <
schily/mconfig.h
>
33
#endif
34
35
#ifdef __cplusplus
36
extern
"C"
{
37
#endif
38
39
#ifdef PROTOTYPES
40
/*
41
* For ANSI C-compilers prefer stdarg.h
42
*/
43
# ifdef HAVE_STDARG_H
44
# ifndef _INCL_STDARG_H
45
# include <stdarg.h>
46
# define _INCL_STDARG_H
47
# endif
48
# else
49
# ifndef _INCL_VARARGS_H
50
# include <varargs.h>
51
# define _INCL_VARARGS_H
52
# endif
53
# endif
54
#else
55
/*
56
* For K&R C-compilers prefer varargs.h
57
*/
58
# ifdef HAVE_VARARGS_H
59
# ifndef _INCL_VARARGS_H
60
# include <varargs.h>
61
# define _INCL_VARARGS_H
62
# endif
63
# else
64
# ifndef _INCL_STDARG_H
65
# include <stdarg.h>
66
# define _INCL_STDARG_H
67
# endif
68
# endif
69
#endif
70
71
#if (defined(__linux__) || defined(__linux) || defined(sun)) && \
72
(defined(__ppc) || defined(__PPC) || \
73
defined(powerpc) || defined(__powerpc__))
74
75
# ifndef VA_LIST_IS_ARRAY
76
# define VA_LIST_IS_ARRAY
77
# endif
78
#endif
79
80
81
/*
82
* __va_copy() is used by GCC 2.8 or newer until va_copy() becomes
83
* a final ISO standard.
84
*/
85
#if !defined(va_copy) && !defined(HAVE_VA_COPY)
86
# if defined(__va_copy)
87
# define va_copy(to, from) __va_copy(to, from)
88
# endif
89
#endif
90
91
/*
92
* va_copy() is a Solaris extension to provide a portable way to perform a
93
* variable argument list "bookmarking" function.
94
* If it is not available via stdarg.h, use a simple assignement for backward
95
* compatibility.
96
*/
97
#if !defined(va_copy) && !defined(HAVE_VA_COPY)
98
#ifdef VA_LIST_IS_ARRAY
99
# define va_copy(to, from) ((to)[0] = (from)[0])
100
#else
101
# define va_copy(to, from) ((to) = (from))
102
#endif
103
#endif
104
105
/*
106
* I don't know any portable way to get an arbitrary
107
* C object from a var arg list so I use a
108
* system-specific routine __va_arg_list() that knows
109
* if 'va_list' is an array. You will not be able to
110
* assign the value of __va_arg_list() but it works
111
* to be used as an argument of a function.
112
* It is a requirement for recursive printf to be able
113
* to use this function argument. If your system
114
* defines va_list to be an array you need to know this
115
* via autoconf or another mechanism.
116
* It would be nice to have something like
117
* __va_arg_list() in stdarg.h
118
*/
119
120
#ifdef VA_LIST_IS_ARRAY
121
# define __va_arg_list(list) va_arg(list, void *)
122
#else
123
# define __va_arg_list(list) va_arg(list, va_list)
124
#endif
125
126
/*
127
* This structure allows to work around the C limitation that a variable of
128
* type array cannot appear at the left side of an assignement operator.
129
* By putting va_list inside a struture, the assignement will work even in case
130
* that va_list is an array2.
131
*/
132
typedef
struct
{
133
va_list
ap
;
134
}
va_lists_t
;
135
136
#ifdef __cplusplus
137
}
138
#endif
139
140
#endif
/* _SCHILY_VARARGS_H */
va_list
char * va_list
Definition:
acmsvcex.h:78
mconfig.h
va_lists_t
Definition:
varargs.h:132
va_lists_t::ap
va_list ap
Definition:
varargs.h:133
sdk
tools
mkisofs
schilytools
include
schily
varargs.h
Generated on Sun Dec 1 2024 06:18:02 for ReactOS by
1.9.6