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#pragma once
#include "Core/Object.h"
#include "Core/GcArray.h"
#include <climits>
namespace storm {
namespace syntax {
namespace glr {
STORM_PKG(lang.bnf.glr);
/**
* Space efficient boolean set.
*/
class BoolSet : public Object {
STORM_CLASS;
public:
// Create.
STORM_CTOR BoolSet();
// Get a value.
Bool STORM_FN get(Nat id);
// Set a value.
void STORM_FN set(Nat id, Bool v);
// Clear all positions.
void STORM_FN clear();
private:
// Data.
GcArray<Nat> *data;
// Constants.
enum {
bitsPerEntry = sizeof(Int) * CHAR_BIT,
minSize = 8
};
// Current count.
inline Nat count() const {
return data ? Nat(data->count*bitsPerEntry) : 0;
}
// Compute bit entry and offset.
inline Nat entry(Nat pos) {
// Note: this could be a right-shift.
return pos / bitsPerEntry;
}
inline Nat offset(Nat pos) {
return pos & (bitsPerEntry - 1);
}
// Grow.
void grow(Nat count);
};
}
}
}
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