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#include "Bitset.class.h"
Bitset::Bitset() {
}
Bitset::Bitset(u32int size) {
init(size, (u32int*)Mem::kalloc(INDEX_FROM_BIT(size)));
}
Bitset::Bitset(u32int size, u32int *ptr) {
init(size, ptr);
}
Bitset::~Bitset() {
Mem::kfree(m_data);
}
void Bitset::init(u32int size, u32int *ptr) {
m_size = size;
m_data = ptr;
for (u32int i = 0; i < INDEX_FROM_BIT(m_size); i++) {
m_data[i] = 0;
}
m_usedCount = 0;
}
void Bitset::setBit(u32int number) {
u32int idx = INDEX_FROM_BIT(number);
u32int off = OFFSET_FROM_BIT(number);
m_data[idx] |= (0x1 << off);
m_usedCount++;
}
void Bitset::clearBit(u32int number) {
u32int idx = INDEX_FROM_BIT(number);
u32int off = OFFSET_FROM_BIT(number);
m_data[idx] &= ~(0x1 << off);
m_usedCount--;
}
bool Bitset::testBit(u32int number) {
u32int idx = INDEX_FROM_BIT(number);
u32int off = OFFSET_FROM_BIT(number);
return (m_data[idx] & (0x1 << off));
}
u32int Bitset::firstFreeBit() {
for (u32int i = 0; i < INDEX_FROM_BIT(m_size); i++) {
if (m_data[i] != 0xFFFFFFFF) {
for (int j = 0; j < 32; j++) {
if (!(m_data[i] & (0x1 << j))) {
return (i * 4 * 8) + j;
}
}
}
}
return (u32int) - 1;
}
u32int Bitset::usedBits() {
return m_usedCount;
}
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