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lvm2/lib/datastruct/bitset.h

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o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
2001-10-19 18:36:57 +04:00
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
#ifndef _LVM_BITSET_H
#define _LVM_BITSET_H
#include "pool.h"
#include <limits.h>
typedef uint32_t *bitset_t;
bitset_t bitset_create(struct pool *mem, unsigned num_bits);
Default stripesize 64k & config file setting for it; Clear many compiler warnings (i386) & associated bugs - hopefully without introducing too many new bugs:-) (Same exercise required for other archs.) Default compilation has optimisation - or else use ./configure --enable-debug
2002-12-20 02:25:55 +03:00
void bitset_destroy(bitset_t bs);
o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
2001-10-19 18:36:57 +04:00
void bit_union(bitset_t out, bitset_t in1, bitset_t in2);
int bit_get_first(bitset_t bs);
int bit_get_next(bitset_t bs, int last_bit);
#define BITS_PER_INT (sizeof(int) * CHAR_BIT)
#define bit(bs, i) \
(bs[(i / BITS_PER_INT) + 1] & (0x1 << (i & (BITS_PER_INT - 1))))
#define bit_set(bs, i) \
(bs[(i / BITS_PER_INT) + 1] |= (0x1 << (i & (BITS_PER_INT - 1))))
#define bit_clear(bs, i) \
(bs[(i / BITS_PER_INT) + 1] &= ~(0x1 << (i & (BITS_PER_INT - 1))))
#define bit_set_all(bs) \
memset(bs + 1, -1, ((*bs / BITS_PER_INT) + 1) * sizeof(int))
#define bit_clear_all(bs) \
memset(bs + 1, 0, ((*bs / BITS_PER_INT) + 1) * sizeof(int))
#define bit_copy(bs1, bs2) \
memcpy(bs1 + 1, bs2 + 1, ((*bs1 / BITS_PER_INT) + 1) * sizeof(int))
#endif
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