-BOOL MoveFigureOneStep(int, int, int, int);
-BOOL MoveFigure(int, int);
-void TestIfGoodThingHitsBadThing(int, int);
-void TestIfBadThingHitsGoodThing(int, int);
-void TestIfHeroHitsBadThing(void);
-void TestIfBadThingHitsHero(void);
-void TestIfFriendHitsBadThing(int, int);
-void TestIfBadThingHitsFriend(int, int);
-void TestIfBadThingHitsOtherBadThing(int, int);
-void KillHero(void);
-void BuryHero(void);
-void RemoveHero(void);
-int DigField(int, int, int, int, int);
-BOOL SnapField(int, int);
-BOOL PlaceBomb(void);
+
+boolean MoveFigureOneStep(struct PlayerInfo *, int, int, int, int);
+boolean MoveFigure(struct PlayerInfo *, int, int);
+void ScrollFigure(struct PlayerInfo *, int);
+void ScrollScreen(struct PlayerInfo *, int);
+
+void TestIfGoodThingHitsBadThing(int, int, int);
+void TestIfBadThingHitsGoodThing(int, int, int);
+void TestIfHeroTouchesBadThing(int, int);
+void TestIfHeroRunsIntoBadThing(int, int, int);
+void TestIfBadThingTouchesHero(int, int);
+void TestIfBadThingRunsIntoHero(int, int, int);
+void TestIfFriendTouchesBadThing(int, int);
+void TestIfBadThingTouchesFriend(int, int);
+void TestIfBadThingTouchesOtherBadThing(int, int);
+void KillHero(struct PlayerInfo *);
+void BuryHero(struct PlayerInfo *);
+void RemoveHero(struct PlayerInfo *);
+int DigField(struct PlayerInfo *, int, int, int, int, int);
+boolean SnapField(struct PlayerInfo *, int, int);
+boolean PlaceBomb(struct PlayerInfo *);