/*
 * Portions Copyright (c) 2011, Aggelos Economopoulos
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _SYS_CPPUTIL_H_
#define _SYS_CPPUTIL_H_

#include <sys/cdefs.h>
/*
 * This file includes macros that abuse the preprocessor --
 * we don't want to have to parse these except when compiling
 * the files that actually use them.
 */

/*
 * Returns the number of args in __VA_ARGS__.
 * Note: returns 1 if __VA_ARGS__ is empty!
 * Taken from the Boost library.
 */

#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,)

#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

/*
 * Generate a struction declaration using the arguments passed in.
 * E.g. __GENSTRUCT(mystruct, int a, char *b); expands to
 * struct mystruct {
 *      int a;
 *      char *b;
 * };
 */

#define __GENSTRUCT(tag, args...)\
        __CONCAT(__GENSTRUCT,VA_NARGS(args))(tag, args)


#define __GENSTRUCT1(tag, arg1) struct tag {    \
        arg1;   \
        }
#define __GENSTRUCT2(tag, arg1, arg2)   struct tag {    \
        arg1;   \
        arg2;   \
        }
#define __GENSTRUCT3(tag, arg1, arg2, arg3)     struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        }
#define __GENSTRUCT4(tag, arg1, arg2, arg3, arg4)       struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        }
#define __GENSTRUCT5(tag, arg1, arg2, arg3, arg4, arg5) struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        }
#define __GENSTRUCT6(tag, arg1, arg2, arg3, arg4, arg5, arg6)   struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        }
#define __GENSTRUCT7(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7)     struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        }
#define __GENSTRUCT8(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)       struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        }
#define __GENSTRUCT9(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9) struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        }
#define __GENSTRUCT10(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10) struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        }
#define __GENSTRUCT11(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11)  struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        }
#define __GENSTRUCT12(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12)   struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        }
#define __GENSTRUCT13(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13)    struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        }
#define __GENSTRUCT14(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14)     struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        }
#define __GENSTRUCT15(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15)      struct tag {  \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        arg15;  \
        }
#define __GENSTRUCT16(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16)       struct tag {   \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        arg15;  \
        arg16;  \
        }
#define __GENSTRUCT17(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17)      struct tag {     \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        arg15;  \
        arg16;  \
        arg17;  \
        }
#define __GENSTRUCT18(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17, arg18)struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        arg15;  \
        arg16;  \
        arg17;  \
        arg18;  \
        }
#define __GENSTRUCT19(tag, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12, arg13, arg14, arg15, arg16, arg17, arg18, arg19) struct tag {    \
        arg1;   \
        arg2;   \
        arg3;   \
        arg4;   \
        arg5;   \
        arg6;   \
        arg7;   \
        arg8;   \
        arg9;   \
        arg10;  \
        arg11;  \
        arg12;  \
        arg13;  \
        arg14;  \
        arg15;  \
        arg16;  \
        arg17;  \
        arg18;  \
        arg19;  \
        }
#endif  /* _SYS_CPPUTIL_H_ */