dbm/include/cdefs.h

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /*
   3  * Copyright (c) 1991, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Berkeley Software Design, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. ***REMOVED*** - see
  18  *    ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)cdefs.h     8.7 (Berkeley) 1/21/94
  36  */
  37
  38 #ifndef _CDEFS_H_
  39 #define _CDEFS_H_
  40
  41 #if defined(__cplusplus)
  42 #define __BEGIN_DECLS   extern "C" {
  43 #define __END_DECLS     }
  44 #else
  45 #define __BEGIN_DECLS
  46 #define __END_DECLS
  47 #endif
  48
  49 /*
  50  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
  51  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
  52  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
  53  * in between its arguments.  __CONCAT can also concatenate double-quoted
  54  * strings produced by the __STRING macro, but this only works with ANSI C.
  55  */
  56 #if defined(__STDC__) || defined(__cplusplus) || defined(_WINDOWS) || defined(XP_OS2)
  57 #define __P(protos)     protos          /* full-blown ANSI C */
  58 #define __CONCAT(x,y)   x ## y
  59 #define __STRING(x)     #x
  60
  61 /* On HP-UX 11.00, <sys/stdsyms.h> defines __const. */
  62 #ifndef __const
  63 #define __const         const           /* define reserved names to standard */
  64 #endif  /* __const */
  65 #define __signed        signed
  66 #define __volatile      volatile
  67 #ifndef _WINDOWS
  68 #if defined(__cplusplus)
  69 #define __inline        inline          /* convert to C++ keyword */
  70 #else
  71 #if !defined(__GNUC__) && !defined(__MWERKS__)
  72 #define __inline                        /* delete GCC keyword */
  73 #endif /* !__GNUC__ */
  74 #endif /* !__cplusplus */
  75 #endif /* !_WINDOWS */
  76
  77 #else   /* !(__STDC__ || __cplusplus) */
  78 #define __P(protos)     ()              /* traditional C preprocessor */
  79 #define __CONCAT(x,y)   x/**/y
  80 #define __STRING(x)     "x"
  81
  82 #ifndef __GNUC__
  83 #define __const                         /* delete pseudo-ANSI C keywords */
  84 #define __inline
  85 #define __signed
  86 #define __volatile
  87 /*
  88  * In non-ANSI C environments, new programs will want ANSI-only C keywords
  89  * deleted from the program and old programs will want them left alone.
  90  * When using a compiler other than gcc, programs using the ANSI C keywords
  91  * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
  92  * When using "gcc -traditional", we assume that this is the intent; if
  93  * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
  94  */
  95 #ifndef NO_ANSI_KEYWORDS
  96 #define const                           /* delete ANSI C keywords */
  97 #define inline
  98 #define signed
  99 #define volatile
 100 #endif
 101 #endif  /* !__GNUC__ */
 102 #endif  /* !(__STDC__ || __cplusplus) */
 103
 104 /*
 105  * GCC1 and some versions of GCC2 declare dead (non-returning) and
 106  * pure (no side effects) functions using "volatile" and "const";
 107  * unfortunately, these then cause warnings under "-ansi -pedantic".
 108  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
 109  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
 110  * in the distribution version of 2.5.5).
 111  */
 112 #if !defined(__GNUC__) || __GNUC__ < 2 || __GNUC_MINOR__ < 5
 113 #define __attribute__(x)        /* delete __attribute__ if non-gcc or gcc1 */
 114 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
 115 #define __dead          __volatile
 116 #define __pure          __const
 117 #endif
 118 #endif
 119
 120 /* Delete pseudo-keywords wherever they are not available or needed. */
 121 #ifndef __dead
 122 #define __dead
 123 #define __pure
 124 #endif
 125
 126 #endif /* !_CDEFS_H_ */