From 87dea7fb2df5fc9283e0ee9718705683c71ba6ab Mon Sep 17 00:00:00 2001 From: leitner Date: Sun, 20 Jan 2008 01:06:50 +0000 Subject: [PATCH] new way to do it --- va_narg.h | 33 ++------------------------------- 1 file changed, 2 insertions(+), 31 deletions(-) diff --git a/va_narg.h b/va_narg.h index 58a6355..eab88d3 100644 --- a/va_narg.h +++ b/va_narg.h @@ -1,36 +1,7 @@ #ifndef _VA_NARG_H #define _VA_NARG_H -/* Idea from Laurent Deniau, - * http://groups.google.com/group/comp.std.c/browse_thread/thread/77ee8c8f92e4a3fb/346fc464319b1ee5?lnk=st&q=&rnum=1#346fc464319b1ee5 - */ - -/* The __VA_NARG__ macro returns the number of arguments that have been - * passed to it. - */ - -#define __VA_NARG__(...) \ - PP_NARG_(__VA_ARGS__,PP_RSEQ_N()) -#define PP_NARG_(...) \ - PP_ARG_N(__VA_ARGS__) -#define PP_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 PP_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 - -#define COUNT(x, ...) ({ typeof (x) __fnord[] = { x, __VA_ARGS__ }; sizeof(__fnord)/sizeof(__fnord[0]); }) -#define COUNT_PREFIX(x, ...) ({ typeof (x) __fnord[] = { x, __VA_ARGS__ }; sizeof(__fnord)/sizeof(__fnord[0]); }), x, __VA_ARGS__ +/* Idea from Stefan Reuther, fe5vsq.17c.1@stefan.msgid.phost.de */ +#define PP_NARG(...) (sizeof((_Bool[]){__VA_ARGS__})/sizeof(_Bool)) #endif