Class: LIBUSB::Bos::PlatformDescriptor

Inherits:

FFI::Struct

• Object
• FFI::Struct
• LIBUSB::Bos::PlatformDescriptor

Includes:

GenericMethods

Defined in:

lib/libusb/bos.rb

Overview

A structure representing a Platform descriptor. This descriptor is documented in section 9.6.2.4 of the USB 3.2 specification.

Instance Method Summary

• #bReserved ⇒ Object

  Reserved field.

• #capabilityData ⇒ String

  This is a variable-length field containing data associated with the platform specific capability.

• #initialize(ctx, *args) ⇒ PlatformDescriptor constructor

  A new instance of PlatformDescriptor.

• #inspect ⇒ Object
• #platformCapabilityUUID ⇒ String

  128 bit UUID.

Methods included from GenericMethods

#bDescriptorType, #bDevCapabilityType, #bLength, #dev_capability_data

Constructor Details

#initialize(ctx, *args) ⇒ PlatformDescriptor

Returns a new instance of PlatformDescriptor.

# File 'lib/libusb/bos.rb', line 246

def initialize(ctx, *args)
  super(*args)

  register_context(ctx, :libusb_free_platform_descriptor)
end

Instance Method Details

#bReserved ⇒ Object

Reserved field

# File 'lib/libusb/bos.rb', line 253

def bReserved
  self[:bReserved]
end

#capabilityData ⇒ String

This is a variable-length field containing data associated with the platform specific capability. This field may be zero bytes in length.

Returns:

• (String)

# File 'lib/libusb/bos.rb', line 265

def capabilityData
  self[:CapabilityData].to_ptr.read_bytes(bLength - 20)
end

#inspect ⇒ Object

# File 'lib/libusb/bos.rb', line 269

def inspect
  "\#<#{self.class} #{platformCapabilityUUID.unpack1("H*")} (#{capabilityData.unpack1("H*")})>"
end

#platformCapabilityUUID ⇒ String

Returns 128 bit UUID.

Returns:

• (String) —

  128 bit UUID

# File 'lib/libusb/bos.rb', line 258

def platformCapabilityUUID
  self[:PlatformCapabilityUUID].to_ptr.read_bytes(16)
end