fix #57 , crash at moment reading is received, for Dexcom G5, undo ch…

…anges done in commit f25b5f1

xdrip/BluetoothTransmitter/CGM/Dexcom/G5/G5Messages/NSData+CRC.swift

@@ -50,7 +50,7 @@ extension UInt8 {
 
 extension Data {
     var isCRCValid: Bool {
-        return dropLast(2).crc16 == suffix(2).toInt(position: 0, length: 2)
+        return dropLast(2).crc16 == suffix(2).toInt()
     }
 
     func appendingCRC() -> Data {

xdrip/BluetoothTransmitter/CGM/Dexcom/G5/G5Messages/SensorDataRxMessage.swift

@@ -18,9 +18,9 @@ struct SensorDataRxMessage: TransmitterRxMessage {
 
         status = data[1]
         timestamp = Date()
-        let filteredAsUint32:UInt32 = data.uint32(position: 6)
+        let filteredAsUint32:UInt32 = data[6..<10].toInt()
         filtered = Double(filteredAsUint32)
-        let unfilteredAsUint32:UInt32 = data.uint32(position: 10)
+        let unfilteredAsUint32:UInt32 = data[10..<14].toInt()
         unfiltered = Double(unfilteredAsUint32)
     }
 }

xdrip/Extensions/Data.swift

@@ -51,39 +51,43 @@ extension Data {
     func uint64 (position:Int)-> UInt64 {
         let start = position
         let end = start.advanced(by: 8)
-        let number: UInt64 =  self.subdata(in: start..<end).withUnsafeBytes { $0.load(as: UInt64.self)}
+        let number: UInt64 =  self.subdata(in: start..<end).toInt()
         return number
     }
 
     ///takes 4 bytes starting at position and converts to Uint32
     func uint32 (position:Int)-> UInt32 {
         let start = position
         let end = start.advanced(by: 4)
-        let number: UInt32 =  self.subdata(in: start..<end).withUnsafeBytes { $0.load(as: UInt32.self) }
+        let number: UInt32 =  self.subdata(in: start..<end).toInt()
         return number
     }
 
     ///takes 2 bytes starting at position and converts to Uint16
     func uint16 (position:Int)-> UInt16 {
         let start = position
         let end = start.advanced(by: 2)
-        let number: UInt16 =  self.subdata(in: start..<end).withUnsafeBytes { $0.load(as: UInt16.self) }
+        let number: UInt16 =  self.subdata(in: start..<end).toInt()
         return number
     }
 
     ///takes 1 byte starting at position and converts to Uint8
     func uint8 (position:Int)-> UInt8 {
         let start = position
         let end = start.advanced(by: 1)
-        let number: UInt8 =  self.subdata(in: start..<end).withUnsafeBytes { $0.load(as: UInt8.self) }
+        let number: UInt8 =  self.subdata(in: start..<end).toInt()
         return number
     }
 
-    func toInt (position: Int, length: Int) -> Int {
-        let start = position
-        let end = start.advanced(by: length)
-        let number: Int =  self.subdata(in: start..<end).withUnsafeBytes { $0.load(as: Int.self) }
-        return number
+    //source Data.Swift CGMBLEKit
+    func to<T: FixedWidthInteger>(_: T.Type) -> T {
+        return self.withUnsafeBytes { (bytes: UnsafePointer<T>) in
+            return T(littleEndian: bytes.pointee)
+        }
+    }
+
+    func toInt<T: FixedWidthInteger>() -> T {
+        return to(T.self)
     }
 
     mutating func append<T: FixedWidthInteger>(_ newElement: T) {

xdrip/Supporting Files/Info.plist

@@ -19,7 +19,7 @@
 	<key>CFBundleShortVersionString</key>
 	<string>$(MARKETING_VERSION)</string>
 	<key>CFBundleVersion</key>
-	<string>3153</string>
+	<string>3157</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>NSAppTransportSecurity</key>