# IOBluetoothUtilities.h See the Overview section above for header-level documentation. ## Discussion #### Included Headers - - - - - - - - - ## Topics ### Miscellaneous [`func IOBluetoothFindNumberOfRegistryEntriesOfClassName(UnsafePointer!) -> Int`](/documentation/IOBluetooth/IOBluetoothFindNumberOfRegistryEntriesOfClassName(_:)) The number of registry entries with a device classname. [`func IOBluetoothGetUniqueFileNameAndPath(String!, String!) -> String!`](/documentation/IOBluetooth/IOBluetoothGetUniqueFileNameAndPath(_:_:)) [`func IOBluetoothIsFileAppleDesignatedPIMData(String!) -> Bool`](/documentation/IOBluetooth/IOBluetoothIsFileAppleDesignatedPIMData(_:)) Apple designated PIM data is classified as: .vcard, .vcal, .vcf, .vnote, .vmsg, .vcs [`func IOBluetoothNSStringFromDeviceAddress(UnsafePointer!) -> String!`](/documentation/IOBluetooth/IOBluetoothNSStringFromDeviceAddress(_:)) Convenience routine to take a device address structure and create an NSString. [`func IOBluetoothNSStringToDeviceAddress(String!, UnsafeMutablePointer!) -> IOReturn`](/documentation/IOBluetooth/IOBluetoothNSStringToDeviceAddress(_:_:)) Convenience routine to take an NSString and turn it into a BluetoothDeviceAddress structure. [`func IOBluetoothNumberOfAvailableHIDDevices() -> Int`](/documentation/IOBluetooth/IOBluetoothNumberOfAvailableHIDDevices()) Returns total number of HID devices on the system (Bluetooth + USB) [`func IOBluetoothNumberOfKeyboardHIDDevices() -> Int`](/documentation/IOBluetooth/IOBluetoothNumberOfKeyboardHIDDevices()) Returns number of keyboard HID devices on the system (Bluetooth + USB) [`func IOBluetoothNumberOfPointingHIDDevices() -> Int`](/documentation/IOBluetooth/IOBluetoothNumberOfPointingHIDDevices()) Returns number of “pointing” HID devices on the system (Bluetooth + USB) [`func IOBluetoothNumberOfTabletHIDDevices() -> Int`](/documentation/IOBluetooth/IOBluetoothNumberOfTabletHIDDevices()) Returns number of “Tablet” HID devices on the system (Bluetooth + USB) [`extern long IOBluetoothPackData(void *ioBuffer, const char *inFormat, ...);`](/documentation/IOBluetooth/IOBluetoothPackData) Packs a variable amount of parameters into a buffer according to a printf-style format string. [`extern long IOBluetoothUnpackData(ByteCount inBufferSize, const void *inBuffer, const char *inFormat, ...);`](/documentation/IOBluetooth/IOBluetoothUnpackData) Unpacks a variable amount of data from a buffer into a variable number of parameters according to a printf-style format string. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)