IOUSBGetNextCapabilityDescriptor

objc2_io_usb_host

Function IOUSBGetNextCapabilityDescriptor 

Source 
pub unsafe extern "C-unwind" fn IOUSBGetNextCapabilityDescriptor(
    bos_descriptor: *const IOUSBBOSDescriptor,
    current_descriptor: *const IOUSBDeviceCapabilityDescriptorHeader,
) -> *const IOUSBDeviceCapabilityDescriptorHeader
Available on crate features AppleUSBDescriptorParsing and objc2-io-kit only.
Expand description

Get the next device capability descriptor in a BOS descriptor

This method will advance currentDescriptor by its bLength, and validate that the new descriptor fits withing the bounds of bosDescriptor. Using NULL for currentDescriptor will return the first descriptor after the BOS descriptor.

Parameter bosDescriptor: BOS descriptor that contains the descriptors to iterate through

Parameter currentDescriptor: A descriptor pointer within the bounds of bosDescriptor, or NULL

Returns: DeviceCapabilityDescriptor pointer, or NULL if no descriptor can be returned

ยงSafety

  • bos_descriptor must be a valid pointer.
  • current_descriptor must be a valid pointer.