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// Copyright 2006 The Android Open Source Project
#ifndef BITVECTOR_H
#define BITVECTOR_H
#include <inttypes.h>
#include <assert.h>
class Bitvector {
public:
explicit Bitvector(int num_bits) {
num_bits_ = num_bits;
// Round up to a multiple of 32
num_bits = (num_bits + 31) & ~31;
vector_ = new uint32_t[num_bits >> 5];
}
~Bitvector() {
delete[] vector_;
}
void SetBit(int bitnum) {
assert(bitnum < num_bits_);
vector_[bitnum >> 5] |= 1 << (bitnum & 31);
}
void ClearBit(int bitnum) {
assert(bitnum < num_bits_);
vector_[bitnum >> 5] &= ~(1 << (bitnum & 31));
}
bool GetBit(int bitnum) {
assert(bitnum < num_bits_);
return (vector_[bitnum >> 5] >> (bitnum & 31)) & 1;
}
private:
int num_bits_;
uint32_t *vector_;
};
#endif // BITVECTOR_H
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