-extern const std::string engine_info(bool to_uci = false);
-extern int system_time();
-extern int cpu_count();
-extern void timed_wait(WaitCondition*, Lock*, int);
-extern void prefetch(char* addr);
-
-extern void dbg_hit_on(bool b);
-extern void dbg_hit_on_c(bool c, bool b);
-extern void dbg_before();
-extern void dbg_after();
-extern void dbg_mean_of(int v);
-extern void dbg_print_hit_rate();
-extern void dbg_print_mean();
-
-class Position;
-extern Move move_from_uci(const Position& pos, const std::string& str);
-extern const std::string move_to_uci(Move m, bool chess960);
-extern const std::string move_to_san(Position& pos, Move m);
-
-struct Log : public std::ofstream {
- Log(const std::string& f = "log.txt") : std::ofstream(f.c_str(), std::ios::out | std::ios::app) {}
- ~Log() { if (is_open()) close(); }
+const std::string engine_info(bool to_uci = false);
+void timed_wait(WaitCondition&, Lock&, int);
+void prefetch(char* addr);
+void start_logger(bool b);
+
+void dbg_hit_on(bool b);
+void dbg_hit_on_c(bool c, bool b);
+void dbg_mean_of(int v);
+void dbg_print();
+
+
+namespace Time {
+ typedef int64_t point;
+ inline point now() { return system_time_to_msec(); }
+}
+
+
+template<class Entry, int Size>
+struct HashTable {
+ HashTable() : table(Size, Entry()) {}
+ Entry* operator[](Key k) { return &table[(uint32_t)k & (Size - 1)]; }
+
+private:
+ std::vector<Entry> table;