From: Aggelos Economopoulos Date: Fri, 30 Dec 2011 17:00:44 +0000 (-0800) Subject: Introduce sys/cpputil.h for our cpp metaprogramming needs X-Git-Tag: v3.0.0~229 X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/2de5e81cb248b4997606ed2be65dea05883d7ca7 Introduce sys/cpputil.h for our cpp metaprogramming needs --- diff --git a/sys/sys/cpputil.h b/sys/sys/cpputil.h new file mode 100644 index 0000000000..197179fd67 --- /dev/null +++ b/sys/sys/cpputil.h @@ -0,0 +1,261 @@ +#ifndef _SYS_CPPUTIL_H_ +#define _SYS_CPPUTIL_H_ + +#include +/* + * 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! + */ + +#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_ */