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#include "bitset.h"
void
bitarena_init(bitarena_t *arena, int size)
{
arena->size = size;
size_t memSize = sizeof(char) * BITSET_BYTES * size;
arena->arena = malloc(memSize);
memset(arena->arena, 0, memSize);
}
bitset_t
bitset_create()
{
bitset_t tmp = (bitset_t) malloc(sizeof(char) * BITSET_BYTES);
memset(tmp, 0, sizeof(char) * BITSET_BYTES);
return tmp;
}
bitset_t
bitarena_at(bitarena_t *arena, int idx)
{
return (arena->arena) + (idx * BITSET_BYTES);
}
bitset_t
bitset_and(bitset_t b1, bitset_t b2)
{
bitset_t bitAnd = bitset_create();
for (int i = 0; i < BITSET_BYTES; ++i)
{
bitAnd[i] = b1[i] & b2[i];
}
return bitAnd;
}
int
bitset_isZero(bitset_t bitset)
{
for (int i = 0; i < BITSET_BYTES; ++i)
{
if (bitset[i] != 0)
return 0;
}
return 1;
}
void
bitset_set(bitset_t bitset, int position)
{
int byte = position / (sizeof(char) * 8);
int shift = position % (sizeof(char) * 8);
bitset[byte] = bitset[byte] | (1 << shift);
}
void
bitset_unset(bitset_t bitset, int position)
{
int byte = position / (sizeof(char) * 8);
int shift = position % (sizeof(char) * 8);
bitset[byte] = bitset[byte] & ~(1 << shift);
}
int
bitset_equals(bitset_t b1, bitset_t b2)
{
for (int i = 0; i < BITSET_BYTES; ++i)
{
if (b1[i] != b2[i])
return 0;
}
return 1;
}
void
bitset_print(bitset_t bitset)
{
for (int i = 3; i >= 0; --i)
{
printf("%i ", bitset[i]);
}
printf("\n");
}
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