/// Score struct keeps a midgame and an endgame value in a single
/// ScoreValue 64 bit union.
-union ScoreValue {
- int64_t v64;
- struct {
- int32_t mgv;
- int32_t egv;
- } v32;
-};
+typedef int score_t;
struct Score {
Score() {}
- Score(const Score& s) { v = s.v; }
- Score(int mg, int eg) { v.v32.mgv = int32_t(mg); v.v32.egv = int32_t(eg); }
+ Score(score_t mg, score_t eg) { mgv = mg; egv = eg; }
- Score& operator=(const Score& s) { v = s.v; return *this; }
- Score& operator+=(const Score& s) { v.v32.mgv += s.v.v32.mgv; v.v32.egv += s.v.v32.egv; return *this; }
- Score& operator-=(const Score& s) { v.v32.mgv -= s.v.v32.mgv; v.v32.egv -= s.v.v32.egv; return *this; }
+ Score& operator+=(const Score& s) { mgv += s.mg(); egv += s.eg(); return *this; }
+ Score& operator-=(const Score& s) { mgv -= s.mg(); egv -= s.eg(); return *this; }
+ Score operator+(const Score& s) { return Score(mg() + s.mg(), eg() + s.eg()); }
+ Score operator-(const Score& s) { return Score(mg() - s.mg(), eg() - s.eg()); }
- bool operator==(const Score& s) { return v.v64 == s.v.v64; }
- bool operator!=(const Score& s) { return v.v64 != s.v.v64; }
+ bool operator==(const Score& s) { return mgv == s.mg() && egv == s.eg(); }
+ bool operator!=(const Score& s) { return !(*this == s); }
- Value mg() const { return Value(v.v32.mgv); }
- Value eg() const { return Value(v.v32.egv); }
+ Value mg() const { return Value(mgv); }
+ Value eg() const { return Value(egv); }
private:
- ScoreValue v;
+ score_t mgv;
+ score_t egv;
};
-inline Score operator+(Score s1, Score s2) { return Score(s1.mg() + s2.mg(), s1.eg() + s2.eg()); }
-inline Score operator-(Score s1, Score s2) { return Score(s1.mg() - s2.mg(), s1.eg() - s2.eg()); }
inline Score operator*(Score s1, Score s2) { return Score(s1.mg() * s2.mg(), s1.eg() * s2.eg()); }
inline Score operator*(int i, Score s) { return Score(i * s.mg(), i * s.eg()); }
inline Score operator*(Score s, int i) { return Score(s.mg() * i, s.eg() * i); }