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# Utilities

Manipulate bit structures and convert integers between device- and platform-native formats.

## Topics

### Integer Conversion Routines

[`#define HostToUSB16`](/documentation/USBDriverKit/HostToUSB16)

[`#define HostToUSB32`](/documentation/USBDriverKit/HostToUSB32)

[`#define HostToUSB64`](/documentation/USBDriverKit/HostToUSB64)

[`#define USBToHost16`](/documentation/USBDriverKit/USBToHost16)

[`#define USBToHost32`](/documentation/USBDriverKit/USBToHost32)

[`#define USBToHost64`](/documentation/USBDriverKit/USBToHost64)

### Bit Manipulations

[`#define IOUSBBit(bit)`](/documentation/USBDriverKit/IOUSBBit)

[`#define IOUSBBitRange(start, end)`](/documentation/USBDriverKit/IOUSBBitRange)

[`#define IOUSBBitRange64(start, end)`](/documentation/USBDriverKit/IOUSBBitRange64)

[`#define IOUSBBitRangePhase(start, end)`](/documentation/USBDriverKit/IOUSBBitRangePhase)

### Bitrate Constants

[`#define kIOUSB30Bitrate5Gbps`](/documentation/USBDriverKit/kIOUSB30Bitrate5Gbps)

[`#define kIOUSB30Bitrate10Gbps`](/documentation/USBDriverKit/kIOUSB30Bitrate10Gbps)

[`#define kIOUSB32Bitrate20Gbps`](/documentation/USBDriverKit/kIOUSB32Bitrate20Gbps)


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