[PTM] Implement GetAdapterState, GetBatteryLevel

include/services/ptm.hpp

@@ -12,6 +12,8 @@ class PTMService {
 
 	// Service commands
 	void configureNew3DSCPU(u32 messagePointer);
+	void getAdapterState(u32 messagePointer);
+	void getBatteryLevel(u32 messagePointer);
 	void getStepHistory(u32 messagePointer);
 	void getTotalStepCount(u32 messagePointer);
 
@@ -19,4 +21,26 @@ public:
 	PTMService(Memory& mem) : mem(mem) {}
 	void reset();
 	void handleSyncRequest(u32 messagePointer);
+
+	// 0% -> 0 (shutting down)
+	// 1-5% -> 1
+	// 6-10% -> 2
+	// 11-30% -> 3
+	// 31-60% -> 4
+	// 61-100% -> 5
+	static constexpr u8 batteryPercentToLevel(u8 percent) {
+		if (percent == 0) {
+			return 0;
+		} else if (percent >= 1 && percent <= 5) {
+			return 1;
+		} else if (percent >= 6 && percent <= 10) {
+			return 2;
+		} else if (percent >= 11 && percent <= 30) {
+			return 3;
+		} else if (percent >= 31 && percent <= 60) {
+			return 4;
+		} else {
+			return 5;
+		}
+	}
 };