/usr/include/re/re_bitv.h is in libre-dev 0.4.14-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | /**
* @file re_bitv.h Interface to Bit Vector functions
*
* Copyright (C) 2010 Creytiv.com
*/
typedef unsigned long bitv_t;
enum {
BITS_SZ = (8*sizeof(bitv_t)),
BITS_MASK = (BITS_SZ-1)
};
#define BITV_NELEM(nbits) (((nbits) + (BITS_SZ) - 1) / (BITS_SZ))
#define BITV_DECL(name, nbits) bitv_t (name)[BITV_NELEM(nbits)]
static inline uint32_t index2offset(uint32_t i)
{
return i/BITS_SZ;
}
static inline bitv_t index2bit(uint32_t i)
{
return (bitv_t)1<<(i & BITS_MASK);
}
/*
* Public API
*/
static inline void bitv_init(bitv_t *bv, uint32_t nbits, bool val)
{
memset(bv, val?0xff:0x00, BITV_NELEM(nbits)*sizeof(bitv_t));
}
static inline void bitv_set(bitv_t *bv, uint32_t i)
{
bv[index2offset(i)] |= index2bit(i);
}
static inline void bitv_clr(bitv_t *bv, uint32_t i)
{
bv[index2offset(i)] &= ~index2bit(i);
}
static inline void bitv_assign(bitv_t *bv, uint32_t i, bool val)
{
if (val)
bitv_set(bv, i);
else
bitv_clr(bv, i);
}
static inline bool bitv_val(const bitv_t *bv, uint32_t i)
{
return 0 != (bv[index2offset(i)] & index2bit(i));
}
static inline void bitv_toggle(bitv_t *bv, uint32_t i)
{
bv[index2offset(i)] ^= index2bit(i);
}
static inline void bitv_assign_range(bitv_t *bv, uint32_t i, uint32_t n,
bool val)
{
while (n--)
bitv_assign(bv, i+n, val);
}
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