diff options
Diffstat (limited to 'include/nm-macros-internal.h')
| -rw-r--r-- | include/nm-macros-internal.h | 98 |
1 files changed, 85 insertions, 13 deletions
diff --git a/include/nm-macros-internal.h b/include/nm-macros-internal.h index 405051f3..170fb46c 100644 --- a/include/nm-macros-internal.h +++ b/include/nm-macros-internal.h @@ -46,6 +46,31 @@ /********************************************************/ +/* http://stackoverflow.com/a/2124385/354393 */ + +#define NM_NARG(...) \ + _NM_NARG(__VA_ARGS__,_NM_NARG_RSEQ_N()) +#define _NM_NARG(...) \ + _NM_NARG_ARG_N(__VA_ARGS__) +#define _NM_NARG_ARG_N( \ + _1, _2, _3, _4, _5, _6, _7, _8, _9,_10, \ + _11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \ + _21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \ + _31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \ + _41,_42,_43,_44,_45,_46,_47,_48,_49,_50, \ + _51,_52,_53,_54,_55,_56,_57,_58,_59,_60, \ + _61,_62,_63,N,...) N +#define _NM_NARG_RSEQ_N() \ + 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, \ + 9,8,7,6,5,4,3,2,1,0 + +/********************************************************/ + #if defined (__GNUC__) #define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(GCC diagnostic ignored warning) #elif defined (__clang__) @@ -85,21 +110,68 @@ /* macro to return strlen() of a compile time string. */ #define STRLEN(str) ( sizeof ("" str) - 1 ) -#define NM_IN_SET(x, y, ...) \ - ({ \ - const typeof(y) _y = (y); \ - typeof(_y) _x = (x); \ - unsigned _i; \ - gboolean _found = FALSE; \ - for (_i = 0; _i < 1 + sizeof((typeof(_x)[]) { __VA_ARGS__ })/sizeof(typeof(_x)); _i++) { \ - if (((typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \ - _found = TRUE; \ - break; \ - } \ - } \ - _found; \ +/********************************************************/ + +#define _NM_IN_SET_EVAL_1(op, x, y1) \ + ({ \ + typeof(x) _x = (x); \ + ( (_x == (y1)) \ + ); \ + }) + +#define _NM_IN_SET_EVAL_2(op, x, y1, y2) \ + ({ \ + typeof(x) _x = (x); \ + ( (_x == (y1)) \ + op (_x == (y2)) \ + ); \ + }) + +#define _NM_IN_SET_EVAL_3(op, x, y1, y2, y3) \ + ({ \ + typeof(x) _x = (x); \ + ( (_x == (y1)) \ + op (_x == (y2)) \ + op (_x == (y3)) \ + ); \ }) +#define _NM_IN_SET_EVAL_4(op, x, y1, y2, y3, y4) \ + ({ \ + typeof(x) _x = (x); \ + ( (_x == (y1)) \ + op (_x == (y2)) \ + op (_x == (y3)) \ + op (_x == (y4)) \ + ); \ + }) + +#define _NM_IN_SET_EVAL_5(op, x, y1, y2, y3, y4, y5) \ + ({ \ + typeof(x) _x = (x); \ + ( (_x == (y1)) \ + op (_x == (y2)) \ + op (_x == (y3)) \ + op (_x == (y4)) \ + op (_x == (y5)) \ + ); \ + }) + +#define _NM_IN_SET_EVAL_N2(op, x, n, ...) _NM_IN_SET_EVAL_##n(op, x, __VA_ARGS__) +#define _NM_IN_SET_EVAL_N(op, x, n, ...) _NM_IN_SET_EVAL_N2(op, x, n, __VA_ARGS__) + +/* Beware that this does short-circuit evaluation (use "||" instead of "|") + * which has a possibly unexpected non-function-like behavior. + * Use NM_IN_SET_SE if you need all arguments to be evaluted. */ +#define NM_IN_SET(x, ...) _NM_IN_SET_EVAL_N(||, x, NM_NARG (__VA_ARGS__), __VA_ARGS__) + +/* "SE" stands for "side-effect". Contrary to NM_IN_SET(), this does not do + * short-circuit evaluation, which can make a difference if the arguments have + * side-effects. */ +#define NM_IN_SET_SE(x, ...) _NM_IN_SET_EVAL_N(|, x, NM_NARG (__VA_ARGS__), __VA_ARGS__) + +/*****************************************************************************/ + #define NM_PRINT_FMT_QUOTED(cond, prefix, str, suffix, str_else) \ (cond) ? (prefix) : "", \ (cond) ? (str) : (str_else), \ |