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#ifndef CYCLICINT_H
#define CYCLICINT_H
//! Class containing an integer which ranges from 0..N-1.
//!
//! Exceeding the ends will overflow to the other end. Implicit cast to/from int is provided.
template<int N>
class CyclicInt {
private:
int value;
CyclicInt set(int v) {
value = v < N ? v < 0 ? N - -v % N : v : v % N;
return *this;
}
public:
CyclicInt() {
}
CyclicInt(int v) {
set(v);
}
CyclicInt operator=(int v) {
return set(v);
}
CyclicInt operator+(CyclicInt v) {
return value + v.value;
}
CyclicInt operator+(int v) {
return value + v;
}
CyclicInt operator+=(CyclicInt v) {
return set(value + v.value);
}
CyclicInt operator++() {
return set(value + 1);
}
CyclicInt operator++(int) {
int v = value;
set(value + 1);
return v;
}
CyclicInt operator-(CyclicInt v) {
return value - v.value;
}
CyclicInt operator-(int v) {
return value - v;
}
CyclicInt operator-=(CyclicInt v) {
return set(value - v.value);
}
CyclicInt operator--() {
return set(value - 1);
}
CyclicInt operator--(int) {
int v = value;
set(value - 1);
return v;
}
operator int() {
return value;
}
};
#endif
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