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Diffstat (limited to 'src/include/skalibs/bitarray.h')
| -rw-r--r-- | src/include/skalibs/bitarray.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/include/skalibs/bitarray.h b/src/include/skalibs/bitarray.h new file mode 100644 index 0000000..7cf79b3 --- /dev/null +++ b/src/include/skalibs/bitarray.h @@ -0,0 +1,33 @@ +/* ISC license. */ + +#ifndef BITARRAY_H +#define BITARRAY_H + +#include <skalibs/gccattributes.h> + +#define bitarray_div8(n) ((n) ? 1U + (((n) - 1) >> 3) : 0U) + +extern void bitarray_clearsetn (unsigned char *, unsigned int, unsigned int, int) ; +#define bitarray_clearn(s, start, len) bitarray_clearsetn(s, start, (len), 0) +#define bitarray_setn(s, start, len) bitarray_clearsetn(s, start, (len), 1) + +#define bitarray_peek(s, n) (((s)[(n)>>3] & (1U<<((n)&7))) ? 1 : 0) +#define bitarray_isset(b, n) bitarray_peek(b, n) +#define bitarray_clear(s, n) ((s)[(n)>>3] &= ~(1U << ((n) & 7))) +#define bitarray_set(s, n) ((s)[(n)>>3] |= 1U << ((n) & 7)) +#define bitarray_poke(s, n, h) ((h) ? bitarray_set(s, n) : bitarray_clear(s, n)) + +extern int bitarray_testandpoke (unsigned char *, unsigned int, int) ; +#define bitarray_testandclear(b, n) bitarray_testandpoke(b, n, 0) +#define bitarray_testandset(b, n) bitarray_testandpoke(b, n, 1) + +extern unsigned int bitarray_firstclear (unsigned char const *, unsigned int) gccattr_pure ; +extern unsigned int bitarray_firstset (unsigned char const *, unsigned int) gccattr_pure ; +#define bitarray_first(s, n, h) ((h) ? bitarray_firstset(s, n) : bitarray_firstclear(s, n)) + +extern void bitarray_not (unsigned char *, unsigned int, unsigned int) ; +extern void bitarray_and (unsigned char *, unsigned char const *, unsigned char const *, unsigned int) ; +extern void bitarray_or (unsigned char *, unsigned char const *, unsigned char const *, unsigned int) ; +extern void bitarray_xor (unsigned char *, unsigned char const *, unsigned char const *, unsigned int) ; + +#endif |