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MINOR: tools: add new bitmap manipulation functions

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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.
This commit is contained in:
Willy Tarreau 2019-06-07 10:42:43 +02:00
parent 7348119fb2
commit 7355b040d1
1 changed files with 24 additions and 0 deletions
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24
include/common/standard.h
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@ -891,6 +891,30 @@ static inline unsigned long nbits(int bits)
return (2UL << bits) - 1;
}
/* sets bit <bit> into map <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 <bit> from map <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 <bit> from map <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 <bit> from map <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