From 01e20c91403ebe8c88697ec11812fb46d414c770 Mon Sep 17 00:00:00 2001 From: rubidium Date: Fri, 21 Dec 2007 19:21:21 +0000 Subject: (svn r11674) -Codechange: refactor some functions out of macros.h into more logical locations. --- src/core/bitmath_func.hpp | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'src/core/bitmath_func.hpp') diff --git a/src/core/bitmath_func.hpp b/src/core/bitmath_func.hpp index 357a52212..6f9c35806 100644 --- a/src/core/bitmath_func.hpp +++ b/src/core/bitmath_func.hpp @@ -276,4 +276,19 @@ template static inline T ROR(const T x, const uint8 n) return (T)(x >> n | x << (sizeof(x) * 8 - n)); } +/** + * Do an operation for each set set bit in a value. + * + * This macros is used to do an operation for each set + * bit in a variable. The first variable can be reused + * in the operation due to it's the bit position counter. + * The second variable will be cleared during the usage + * + * @param i The position counter + * @param b The value which we check for set bits + */ +#define FOR_EACH_SET_BIT(i, b) \ + for (i = 0; b != 0; i++, b >>= 1) \ + if (b & 1) + #endif /* BITMATH_FUNC_HPP */ -- cgit v1.2.3-54-g00ecf