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#pragma once
#include <cstddef>
namespace NCompactTrie {
class ILeafSkipper;
enum TDirection {
D_LEFT,
D_FINAL,
D_NEXT,
D_RIGHT,
D_MAX
};
inline TDirection& operator++(TDirection& direction) {
direction = static_cast<TDirection>(direction + 1);
return direction;
}
inline TDirection& operator--(TDirection& direction) {
direction = static_cast<TDirection>(direction - 1);
return direction;
}
class TNode {
public:
TNode();
// Processes epsilon links and sets ForwardOffset to correct value. Assumes an epsilon link doesn't point to an epsilon link.
TNode(const char* data, size_t offset, const ILeafSkipper& skipFunction);
size_t GetOffset() const {
return Offset;
}
size_t GetLeafOffset() const {
return Offsets[D_FINAL];
}
size_t GetLeafLength() const {
return LeafLength;
}
size_t GetCoreLength() const {
return CoreLength;
}
size_t GetOffsetByDirection(TDirection direction) const {
return Offsets[direction];
}
size_t GetForwardOffset() const {
return Offsets[D_NEXT];
}
size_t GetLeftOffset() const {
return Offsets[D_LEFT];
}
size_t GetRightOffset() const {
return Offsets[D_RIGHT];
}
char GetLabel() const {
return Label;
}
bool IsFinal() const {
return GetLeafOffset() != 0;
}
bool HasEpsilonLinkForward() const {
return GetForwardOffset() > Offset + CoreLength;
}
private:
size_t Offsets[D_MAX];
size_t Offset;
size_t LeafLength;
size_t CoreLength;
char Label;
};
}
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