bsd/sys/cdefs.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright 1995 NeXT Computer, Inc. All rights reserved. */
  23 /*
  24  * Copyright (c) 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * This code is derived from software contributed to Berkeley by
  28  * Berkeley Software Design, Inc.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)cdefs.h     8.8 (Berkeley) 1/9/95
  59  */
  60
  61 #ifndef _CDEFS_H_
  62 #define _CDEFS_H_
  63
  64 #if defined(__cplusplus)
  65 #define __BEGIN_DECLS   extern "C" {
  66 #define __END_DECLS     }
  67 #else
  68 #define __BEGIN_DECLS
  69 #define __END_DECLS
  70 #endif
  71
  72 /*
  73  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
  74  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
  75  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
  76  * in between its arguments.  __CONCAT can also concatenate double-quoted
  77  * strings produced by the __STRING macro, but this only works with ANSI C.
  78  */
  79 #if defined(__STDC__) || defined(__cplusplus)
  80 #define __P(protos)     protos          /* full-blown ANSI C */
  81 #define __CONCAT(x,y)   x ## y
  82 #define __STRING(x)     #x
  83
  84 #define __const         const           /* define reserved names to standard */
  85 #define __signed        signed
  86 #define __volatile      volatile
  87 #if defined(__cplusplus)
  88 #define __inline        inline          /* convert to C++ keyword */
  89 #else
  90 #ifndef __GNUC__
  91 #define __inline                        /* delete GCC keyword */
  92 #endif /* !__GNUC__ */
  93 #endif /* !__cplusplus */
  94
  95 #else   /* !(__STDC__ || __cplusplus) */
  96 #define __P(protos)     ()              /* traditional C preprocessor */
  97 #define __CONCAT(x,y)   x/**/y
  98 #define __STRING(x)     "x"
  99
 100 #ifndef __GNUC__
 101 #define __const                         /* delete pseudo-ANSI C keywords */
 102 #define __inline
 103 #define __signed
 104 #define __volatile
 105 #endif  /* !__GNUC__ */
 106
 107 /*
 108  * In non-ANSI C environments, new programs will want ANSI-only C keywords
 109  * deleted from the program and old programs will want them left alone.
 110  * When using a compiler other than gcc, programs using the ANSI C keywords
 111  * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
 112  * When using "gcc -traditional", we assume that this is the intent; if
 113  * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
 114  */
 115 #ifndef NO_ANSI_KEYWORDS
 116 #define const           __const                 /* convert ANSI C keywords */
 117 #define inline          __inline
 118 #define signed          __signed
 119 #define volatile        __volatile
 120 #endif /* !NO_ANSI_KEYWORDS */
 121 #endif /* !(__STDC__ || __cplusplus) */
 122
 123 /*
 124  * GCC1 and some versions of GCC2 declare dead (non-returning) and
 125  * pure (no side effects) functions using "volatile" and "const";
 126  * unfortunately, these then cause warnings under "-ansi -pedantic".
 127  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
 128  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
 129  * in the distribution version of 2.5.5).
 130  */
 131 #if defined(__MWERKS__) && (__MWERKS__ > 0x2400)
 132         /* newer Metrowerks compilers support __attribute__() */
 133 #elif !defined(__GNUC__) || __GNUC__ < 2 || \
 134         (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
 135 #define __attribute__(x)        /* delete __attribute__ if non-gcc or gcc1 */
 136 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
 137 #define __dead          __volatile
 138 #define __pure          __const
 139 #endif
 140 #endif
 141
 142 /* Delete pseudo-keywords wherever they are not available or needed. */
 143 #ifndef __dead
 144 #define __dead
 145 #define __pure
 146 #endif
 147
 148 #define __IDSTRING(name,string) \
 149      static const char name[] __attribute__((__unused__)) = string
 150
 151 #ifndef __COPYRIGHT
 152 #define __COPYRIGHT(s) __IDSTRING(copyright,s)
 153 #endif
 154
 155 #ifndef __RCSID
 156 #define __RCSID(s) __IDSTRING(rcsid,s)
 157 #endif
 158
 159 #ifndef __SCCSID
 160 #define __SCCSID(s) __IDSTRING(sccsid,s)
 161 #endif
 162
 163 #ifndef __PROJECT_VERSION
 164 #define __PROJECT_VERSION(s) __IDSTRING(project_version,s)
 165 #endif
 166
 167 #endif /* !_CDEFS_H_ */