bsd/net/cc.h

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 2003, Adam Dunkels.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above
  38  *    copyright notice, this list of conditions and the following
  39  *    disclaimer in the documentation and/or other materials provided
  40  *    with the distribution.
  41  * 3. The name of the author may not be used to endorse or promote
  42  *    products derived from this software without specific prior
  43  *    written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  46  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  47  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  49  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  51  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  52  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  53  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  54  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  55  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  56  *
  57  * This file is part of the Contiki desktop OS
  58  *
  59  *
  60  */
  61
  62 /**
  63  * \file
  64  * Default definitions of C compiler quirk work-arounds.
  65  * \author Adam Dunkels <adam@dunkels.com>
  66  *
  67  * This file is used for making use of extra functionality of some C
  68  * compilers used for Contiki, and defining work-arounds for various
  69  * quirks and problems with some other C compilers.
  70  */
  71
  72 #ifndef CC_H_
  73 #define CC_H_
  74
  75 #include "contiki-conf.h"
  76
  77 /**
  78  * Configure if the C compiler supports the "register" keyword for
  79  * function arguments.
  80  */
  81 #if CC_CONF_REGISTER_ARGS
  82 #define CC_REGISTER_ARG register
  83 #else /* CC_CONF_REGISTER_ARGS */
  84 #define CC_REGISTER_ARG
  85 #endif /* CC_CONF_REGISTER_ARGS */
  86
  87 /**
  88  * Configure if the C compiler supports the arguments for function
  89  * pointers.
  90  */
  91 #if CC_CONF_FUNCTION_POINTER_ARGS
  92 #define CC_FUNCTION_POINTER_ARGS 1
  93 #else /* CC_CONF_FUNCTION_POINTER_ARGS */
  94 #define CC_FUNCTION_POINTER_ARGS 0
  95 #endif /* CC_CONF_FUNCTION_POINTER_ARGS */
  96
  97 /**
  98  * Configure if the C compiler supports fastcall function
  99  * declarations.
 100  */
 101 #ifdef CC_CONF_FASTCALL
 102 #define CC_FASTCALL CC_CONF_FASTCALL
 103 #else /* CC_CONF_FASTCALL */
 104 #define CC_FASTCALL
 105 #endif /* CC_CONF_FASTCALL */
 106
 107 /**
 108  * Configure if the C compiler have problems with const function pointers
 109  */
 110 #ifdef CC_CONF_CONST_FUNCTION_BUG
 111 #define CC_CONST_FUNCTION
 112 #else /* CC_CONF_FASTCALL */
 113 #define CC_CONST_FUNCTION const
 114 #endif /* CC_CONF_FASTCALL */
 115
 116 /**
 117  * Configure work-around for unsigned char bugs with sdcc.
 118  */
 119 #if CC_CONF_UNSIGNED_CHAR_BUGS
 120 #define CC_UNSIGNED_CHAR_BUGS 1
 121 #else /* CC_CONF_UNSIGNED_CHAR_BUGS */
 122 #define CC_UNSIGNED_CHAR_BUGS 0
 123 #endif /* CC_CONF_UNSIGNED_CHAR_BUGS */
 124
 125 /**
 126  * Configure if C compiler supports double hash marks in C macros.
 127  */
 128 #if CC_CONF_DOUBLE_HASH
 129 #define CC_DOUBLE_HASH 1
 130 #else /* CC_CONF_DOUBLE_HASH */
 131 #define CC_DOUBLE_HASH 0
 132 #endif /* CC_CONF_DOUBLE_HASH */
 133
 134 #ifdef CC_CONF_INLINE
 135 #define CC_INLINE CC_CONF_INLINE
 136 #else /* CC_CONF_INLINE */
 137 #define CC_INLINE
 138 #endif /* CC_CONF_INLINE */
 139
 140 /**
 141  * Configure if the C compiler supports the assignment of struct value.
 142  */
 143 #ifdef CC_CONF_ASSIGN_AGGREGATE
 144 #define CC_ASSIGN_AGGREGATE(dest, src)  CC_CONF_ASSIGN_AGGREGATE(dest, src)
 145 #else /* CC_CONF_ASSIGN_AGGREGATE */
 146 #define CC_ASSIGN_AGGREGATE(dest, src)  *dest = *src
 147 #endif /* CC_CONF_ASSIGN_AGGREGATE */
 148
 149 #if CC_CONF_NO_VA_ARGS
 150 #define CC_NO_VA_ARGS CC_CONF_VA_ARGS
 151 #endif
 152
 153 #ifndef NULL
 154 #define NULL 0
 155 #endif /* NULL */
 156
 157 #ifndef MAX
 158 #define MAX(n, m)   (((n) < (m)) ? (m) : (n))
 159 #endif
 160
 161 #ifndef MIN
 162 #define MIN(n, m)   (((n) < (m)) ? (n) : (m))
 163 #endif
 164
 165 #ifndef ABS
 166 #define ABS(n)      (((n) < 0) ? -(n) : (n))
 167 #endif
 168
 169
 170 #define CC_CONCAT2(s1, s2) s1##s2
 171 /**
 172  * A C preprocessing macro for concatenating two preprocessor tokens.
 173  *
 174  * We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow
 175  * concatenation of two \#defined macros.
 176  */
 177 #define CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)
 178 #define CC_CONCAT_EXT_2(s1, s2) CC_CONCAT2(s1, s2)
 179
 180 /**
 181  * A C preprocessing macro for concatenating three preprocessor tokens.
 182  */
 183 #define CC_CONCAT3(s1, s2, s3) s1##s2##s3
 184 #define CC_CONCAT_EXT_3(s1, s2, s3) CC_CONCAT3(s1, s2, s3)
 185
 186 #endif /* CC_H_ */