IOUSBGetNextCapabilityDescriptorWithType
Finds the next descriptor matching a given type within a BOS descriptor.
Declaration
const IOUSBDeviceCapabilityDescriptorHeader *IOUSBGetNextCapabilityDescriptorWithType(const IOUSBBOSDescriptor *bosDescriptor, const IOUSBDeviceCapabilityDescriptorHeader *currentDescriptor, const uint8_t type);Parameters
- bosDescriptor:
The BOS descriptor that contains the descriptors to iterate through.
- currentDescriptor:
A descriptor pointer within the bounds of the BOS descriptor, or
NULL. - type:
The descriptor type to find.
Return Value
A descriptor pointer, or NULL if no matching descriptor is available.
Discussion
This method uses getNextCapabilityDescriptor, and further validates that the returned descriptor’s bDevCapabilityType field matches the type parameter.