sys/sys/cpputil.h

   1 /*
   2  * Portions Copyright (c) 2011, Aggelos Economopoulos
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  * 3. Neither the name of The DragonFly Project nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific, prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _SYS_CPPUTIL_H_
  33 #define _SYS_CPPUTIL_H_
  34
  35 #include <sys/cdefs.h>
  36 /*
  37  * This file includes macros that abuse the preprocessor --
  38  * we don't want to have to parse these except when compiling
  39  * the files that actually use them.
  40  */
  41
  42 /*
  43  * Returns the number of args in __VA_ARGS__.
  44  * Note: returns 1 if __VA_ARGS__ is empty!
  45  * Taken from the Boost library.
  46  */
  47
  48 #define VA_NARGS(...) __VA_ARGS_SIZE(__VA_ARGS__, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1,)
  49
  50 #define __VA_ARGS_SIZE(e0, e1, e2, e3, e4, e5, e6, e7, e8, e9, e10, e11, e12, e13, e14, e15, e16, e17, e18, e19, e20, e21, e22, e23, e24, e25, e26, e27, e28, e29, e30, e31, e32, e33, e34, e35, e36, e37, e38, e39, e40, e41, e42, e43, e44, e45, e46, e47, e48, e49, e50, e51, e52, e53, e54, e55, e56, e57, e58, e59, e60, e61, e62, e63, size, ...) size
  51
  52 /*
  53  * Generate a struction declaration using the arguments passed in.
  54  * E.g. __GENSTRUCT(mystruct, int a, char *b); expands to
  55  * struct mystruct {
  56  *      int a;
  57  *      char *b;
  58  * };
  59  */
  60
  61 #define __GENSTRUCT(tag, args...)\
  62         __CONCAT(__GENSTRUCT,VA_NARGS(args))(tag, args)
  63
  64
  65 #define __GENSTRUCT1(tag, arg1) struct tag {    \
  66         arg1;   \
  67         }
  68 #define __GENSTRUCT2(tag, arg1, arg2)   struct tag {    \
  69         arg1;   \
  70         arg2;   \
  71         }
  72 #define __GENSTRUCT3(tag, arg1, arg2, arg3)     struct tag {    \
  73         arg1;   \
  74         arg2;   \
  75         arg3;   \
  76         }
  77 #define __GENSTRUCT4(tag, arg1, arg2, arg3, arg4)       struct tag {    \
  78         arg1;   \
  79         arg2;   \
  80         arg3;   \
  81         arg4;   \
  82         }
  83 #define __GENSTRUCT5(tag, arg1, arg2, arg3, arg4, arg5) struct tag {    \
  84         arg1;   \
  85         arg2;   \
  86         arg3;   \
  87         arg4;   \
  88         arg5;   \
  89         }
  90 #define __GENSTRUCT6(tag, arg1, arg2, arg3, arg4, arg5, arg6)   struct tag {    \
  91         arg1;   \
  92         arg2;   \
  93         arg3;   \
  94         arg4;   \
  95         arg5;   \
  96         arg6;   \
  97         }
  98 #define __GENSTRUCT7(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7)     struct tag {    \
  99         arg1;   \
 100         arg2;   \
 101         arg3;   \
 102         arg4;   \
 103         arg5;   \
 104         arg6;   \
 105         arg7;   \
 106         }
 107 #define __GENSTRUCT8(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)       struct tag {    \
 108         arg1;   \
 109         arg2;   \
 110         arg3;   \
 111         arg4;   \
 112         arg5;   \
 113         arg6;   \
 114         arg7;   \
 115         arg8;   \
 116         }
 117 #define __GENSTRUCT9(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) struct tag {    \
 118         arg1;   \
 119         arg2;   \
 120         arg3;   \
 121         arg4;   \
 122         arg5;   \
 123         arg6;   \
 124         arg7;   \
 125         arg8;   \
 126         arg9;   \
 127         }
 128 #define __GENSTRUCT10(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10) struct tag {    \
 129         arg1;   \
 130         arg2;   \
 131         arg3;   \
 132         arg4;   \
 133         arg5;   \
 134         arg6;   \
 135         arg7;   \
 136         arg8;   \
 137         arg9;   \
 138         arg10;  \
 139         }
 140 #define __GENSTRUCT11(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11)  struct tag {    \
 141         arg1;   \
 142         arg2;   \
 143         arg3;   \
 144         arg4;   \
 145         arg5;   \
 146         arg6;   \
 147         arg7;   \
 148         arg8;   \
 149         arg9;   \
 150         arg10;  \
 151         arg11;  \
 152         }
 153 #define __GENSTRUCT12(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12)   struct tag {    \
 154         arg1;   \
 155         arg2;   \
 156         arg3;   \
 157         arg4;   \
 158         arg5;   \
 159         arg6;   \
 160         arg7;   \
 161         arg8;   \
 162         arg9;   \
 163         arg10;  \
 164         arg11;  \
 165         arg12;  \
 166         }
 167 #define __GENSTRUCT13(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13)    struct tag {    \
 168         arg1;   \
 169         arg2;   \
 170         arg3;   \
 171         arg4;   \
 172         arg5;   \
 173         arg6;   \
 174         arg7;   \
 175         arg8;   \
 176         arg9;   \
 177         arg10;  \
 178         arg11;  \
 179         arg12;  \
 180         arg13;  \
 181         }
 182 #define __GENSTRUCT14(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14)     struct tag {    \
 183         arg1;   \
 184         arg2;   \
 185         arg3;   \
 186         arg4;   \
 187         arg5;   \
 188         arg6;   \
 189         arg7;   \
 190         arg8;   \
 191         arg9;   \
 192         arg10;  \
 193         arg11;  \
 194         arg12;  \
 195         arg13;  \
 196         arg14;  \
 197         }
 198 #define __GENSTRUCT15(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15)      struct tag {  \
 199         arg1;   \
 200         arg2;   \
 201         arg3;   \
 202         arg4;   \
 203         arg5;   \
 204         arg6;   \
 205         arg7;   \
 206         arg8;   \
 207         arg9;   \
 208         arg10;  \
 209         arg11;  \
 210         arg12;  \
 211         arg13;  \
 212         arg14;  \
 213         arg15;  \
 214         }
 215 #define __GENSTRUCT16(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16)       struct tag {   \
 216         arg1;   \
 217         arg2;   \
 218         arg3;   \
 219         arg4;   \
 220         arg5;   \
 221         arg6;   \
 222         arg7;   \
 223         arg8;   \
 224         arg9;   \
 225         arg10;  \
 226         arg11;  \
 227         arg12;  \
 228         arg13;  \
 229         arg14;  \
 230         arg15;  \
 231         arg16;  \
 232         }
 233 #define __GENSTRUCT17(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17)      struct tag {     \
 234         arg1;   \
 235         arg2;   \
 236         arg3;   \
 237         arg4;   \
 238         arg5;   \
 239         arg6;   \
 240         arg7;   \
 241         arg8;   \
 242         arg9;   \
 243         arg10;  \
 244         arg11;  \
 245         arg12;  \
 246         arg13;  \
 247         arg14;  \
 248         arg15;  \
 249         arg16;  \
 250         arg17;  \
 251         }
 252 #define __GENSTRUCT18(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17, arg18)struct tag {    \
 253         arg1;   \
 254         arg2;   \
 255         arg3;   \
 256         arg4;   \
 257         arg5;   \
 258         arg6;   \
 259         arg7;   \
 260         arg8;   \
 261         arg9;   \
 262         arg10;  \
 263         arg11;  \
 264         arg12;  \
 265         arg13;  \
 266         arg14;  \
 267         arg15;  \
 268         arg16;  \
 269         arg17;  \
 270         arg18;  \
 271         }
 272 #define __GENSTRUCT19(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17, arg18, arg19) struct tag {    \
 273         arg1;   \
 274         arg2;   \
 275         arg3;   \
 276         arg4;   \
 277         arg5;   \
 278         arg6;   \
 279         arg7;   \
 280         arg8;   \
 281         arg9;   \
 282         arg10;  \
 283         arg11;  \
 284         arg12;  \
 285         arg13;  \
 286         arg14;  \
 287         arg15;  \
 288         arg16;  \
 289         arg17;  \
 290         arg18;  \
 291         arg19;  \
 292         }
 293 #endif  /* _SYS_CPPUTIL_H_ */