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Merge pull request #93 from harbi-eng/small-optmization

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optimized  nmbs_bitfield macros a little
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Valerio De Benedetto 2025-06-26 23:24:09 +02:00 committed by GitHub
commit e39085552c
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1 changed files with 4 additions and 6 deletions
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nanomodbus.h
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@ -92,24 +92,22 @@ typedef uint8_t nmbs_bitfield_256[32];
/**
* Read a bit from the nmbs_bitfield bf at position b
*/
#define nmbs_bitfield_read(bf, b) ((bool) ((bf)[(b) / 8] & (0x1 << ((b) % 8))))
#define nmbs_bitfield_read(bf, b) ((bool) ((bf)[(b) >> 3] & (0x1 << ((b) & (8 - 1)))))
/**
* Set a bit of the nmbs_bitfield bf at position b
*/
#define nmbs_bitfield_set(bf, b) (((bf)[(b) / 8]) = (((bf)[(b) / 8]) | (0x1 << ((b) % 8))))
#define nmbs_bitfield_set(bf, b) (((bf)[(b) >> 3]) = (((bf)[(b) >> 3]) | (0x1 << ((b) & (8 - 1)))))
/**
* Reset a bit of the nmbs_bitfield bf at position b
*/
#define nmbs_bitfield_unset(bf, b) (((bf)[(b) / 8]) = (((bf)[(b) / 8]) & ~(0x1 << ((b) % 8))))
#define nmbs_bitfield_unset(bf, b) (((bf)[(b) >> 3]) = (((bf)[(b) >> 3]) & ~(0x1 << ((b) & (8 - 1)))))
/**
* Write value v to the nmbs_bitfield bf at position b
*/
#define nmbs_bitfield_write(bf, b, v) \
(((bf)[(b) / 8]) = ((v) ? (((bf)[(b) / 8]) | (0x1 << ((b) % 8))) : (((bf)[(b) / 8]) & ~(0x1 << ((b) % 8)))))
#define nmbs_bitfield_write(bf, b, v) ((bf)[(b) >> 3] = ((bf)[(b) >> 3] & ~(1 << ((b) & 7))) | ((v) << ((b) & 7)))
/**
* Reset (zero) the whole bitfield
*/