From 7355b040d1833aa671382dd47e31ae369681b66e Mon Sep 17 00:00:00 2001 From: Willy Tarreau Date: Fri, 7 Jun 2019 10:42:43 +0200 Subject: [PATCH] MINOR: tools: add new bitmap manipulation functions We now have ha_bit_{set,clr,flip,test} to manipulate bitfields made of arrays of longs. The goal is to get rid of the remaining non-portable FD_{SET,CLR,ISSET} that still exist at a few places. --- include/common/standard.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/common/standard.h b/include/common/standard.h index e88a79ddf..5e0c4c546 100644 --- a/include/common/standard.h +++ b/include/common/standard.h @@ -891,6 +891,30 @@ static inline unsigned long nbits(int bits) return (2UL << bits) - 1; } +/* sets bit into map , which must be long-aligned */ +static inline void ha_bit_set(unsigned long bit, long *map) +{ + map[bit / (8 * sizeof(*map))] |= 1UL << (bit & (8 * sizeof(*map) - 1)); +} + +/* clears bit from map , which must be long-aligned */ +static inline void ha_bit_clr(unsigned long bit, long *map) +{ + map[bit / (8 * sizeof(*map))] &= ~(1UL << (bit & (8 * sizeof(*map) - 1))); +} + +/* flips bit from map , which must be long-aligned */ +static inline void ha_bit_flip(unsigned long bit, long *map) +{ + map[bit / (8 * sizeof(*map))] ^= 1UL << (bit & (8 * sizeof(*map) - 1)); +} + +/* returns non-zero if bit from map is set, otherwise 0 */ +static inline int ha_bit_test(unsigned long bit, const long *map) +{ + return !!(map[bit / (8 * sizeof(*map))] & 1UL << (bit & (8 * sizeof(*map) - 1))); +} + /* * Parse binary string written in hexadecimal (source) and store the decoded * result into binstr and set binstrlen to the lengh of binstr. Memory for