IOUSBGetNextCapabilityDescriptorWithType

objc2_io_usb_host

Function IOUSBGetNextCapabilityDescriptorWithType 

Source 
pub unsafe extern "C-unwind" fn IOUSBGetNextCapabilityDescriptorWithType(
    bos_descriptor: *const IOUSBBOSDescriptor,
    current_descriptor: *const IOUSBDeviceCapabilityDescriptorHeader,
    type: u8,
) -> *const IOUSBDeviceCapabilityDescriptorHeader
Available on crate features AppleUSBDescriptorParsing and objc2-io-kit only.
Expand description

Find the next descriptor matching a given type within a BOS descriptor

This method uses getNextCapabilityDescriptor, and further validates that the returned descriptor’s bDevCapabilityType field matches the type parameter.

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

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

Parameter type: tDeviceCapabilityType representing the descriptor type to find

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

§Safety

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