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usb4java/src/main/java/org/usb4java/ConfigDescriptor.java at master · usb4java/usb4java · GitHub
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ConfigDescriptor.java
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/*
* Copyright 2013 Klaus Reimer <k@ailis.de>
* See LICENSE.md for licensing information.
*
* Based on libusb <http://libusb.info/>:
*
* Copyright 2001 Johannes Erdfelt <johannes@erdfelt.com>
* Copyright 2007-2009 Daniel Drake <dsd@gentoo.org>
* Copyright 2010-2012 Peter Stuge <peter@stuge.se>
* Copyright 2008-2013 Nathan Hjelm <hjelmn@users.sourceforge.net>
* Copyright 2009-2013 Pete Batard <pete@akeo.ie>
* Copyright 2009-2013 Ludovic Rousseau <ludovic.rousseau@gmail.com>
* Copyright 2010-2012 Michael Plante <michael.plante@gmail.com>
* Copyright 2011-2013 Hans de Goede <hdegoede@redhat.com>
* Copyright 2012-2013 Martin Pieuchot <mpi@openbsd.org>
* Copyright 2012-2013 Toby Gray <toby.gray@realvnc.com>
*/
package
org
.
usb4java
;
import
java
.
nio
.
ByteBuffer
;
import
org
.
apache
.
commons
.
lang3
.
builder
.
EqualsBuilder
;
import
org
.
apache
.
commons
.
lang3
.
builder
.
HashCodeBuilder
;
/**
* A structure representing the standard USB configuration descriptor.
*
* This descriptor is documented in section 9.6.3 of the USB 3.0 specification.
* All multiple-byte fields are represented in host-endian format.
*
* @author Klaus Reimer (k@ailis.de)
*/
public
final
class
ConfigDescriptor
{
/** The native pointer to the descriptor structure. */
private
long
configDescriptorPointer
;
/**
* Constructs a new config descriptor which can be passed to the
* {@link LibUsb#getConfigDescriptor(Device, byte, ConfigDescriptor)}
* method.
*/
public
ConfigDescriptor
()
{
// Empty
}
/**
* Returns the native pointer.
*
* @return The native pointer.
*/
public
long
getPointer
()
{
return
this
.
configDescriptorPointer
;
}
/**
* Returns the size of this descriptor (in bytes).
*
* @return The size of this descriptor (in bytes).
*/
public
native
byte
bLength
();
/**
* Returns the descriptor type. Will have value {@link LibUsb#DT_CONFIG}
* in this context.
*
* @return The descriptor type.
*/
public
native
byte
bDescriptorType
();
/**
* Returns the total length of data returned for this configuration.
*
* @return The total length of data.
*/
public
native
short
wTotalLength
();
/**
* Returns the number of interfaces supported by this configuration.
*
* @return The number of supported interfaces.
*/
public
native
byte
bNumInterfaces
();
/**
* Returns the identifier value for this configuration.
*
* @return The identifier value.
*/
public
native
byte
bConfigurationValue
();
/**
* Returns the index of string descriptor describing this configuration.
*
* @return The string descriptor index.
*/
public
native
byte
iConfiguration
();
/**
* Returns the configuration characteristics.
*
* @return The configuration characteristics.
*/
public
native
byte
bmAttributes
();
/**
* Returns the maximum power consumption of the USB device from this bus
* configuration when the device is fully operation. Expressed in units
* of 2 mA when the device is operating in high-speed mode and in units
* of 8 mA when the device is operating in super-speed mode.
*
* @return The maximum power consumption.
*/
public
native
byte
bMaxPower
();
/**
* Returns the array with interfaces supported by this configuration.
*
* @return The array with interfaces.
*/
public
native
Interface
[]
iface
();
/**
* Extra descriptors.
*
* If libusb encounters unknown interface descriptors, it will store them
* here, should you wish to parse them.
*
* @return The extra descriptors.
*/
public
native
ByteBuffer
extra
();
/**
* Length of the extra descriptors, in bytes.
*
* @return The extra descriptors length.
*/
public
native
int
extraLength
();
/**
* Returns a dump of this descriptor.
*
* @return The descriptor dump.
*/
public
String
dump
()
{
final
StringBuilder
builder
=
new
StringBuilder
();
builder
.
append
(
String
.
format
(
"%s"
+
" extralen %17d%n"
+
" extra:%n"
+
"%s"
,
DescriptorUtils
.
dump
(
this
),
this
.
extraLength
(),
DescriptorUtils
.
dump
(
this
.
extra
()).
replaceAll
(
"(?m)^"
,
" "
)));
for
(
final
Interface
iface
:
this
.
iface
())
{
builder
.
append
(
String
.
format
(
"%n"
) +
iface
.
dump
());
}
return
builder
.
toString
();
}
@
Override
public
int
hashCode
()
{
return
new
HashCodeBuilder
()
.
append
(
this
.
bLength
())
.
append
(
this
.
bDescriptorType
())
.
append
(
this
.
wTotalLength
())
.
append
(
this
.
bNumInterfaces
())
.
append
(
this
.
bConfigurationValue
())
.
append
(
this
.
iConfiguration
())
.
append
(
this
.
bmAttributes
())
.
append
(
this
.
bMaxPower
())
.
append
(
this
.
iface
())
.
append
(
this
.
extra
())
.
append
(
this
.
extraLength
())
.
toHashCode
();
}
@
Override
public
boolean
equals
(
final
Object
obj
)
{
if
(
this
==
obj
)
{
return
true
;
}
if
(
obj
==
null
)
{
return
false
;
}
if
(
this
.
getClass
() !=
obj
.
getClass
())
{
return
false
;
}
final
ConfigDescriptor
other
= (
ConfigDescriptor
)
obj
;
return
new
EqualsBuilder
()
.
append
(
this
.
bLength
(),
other
.
bLength
())
.
append
(
this
.
bDescriptorType
(),
other
.
bDescriptorType
())
.
append
(
this
.
wTotalLength
(),
other
.
wTotalLength
())
.
append
(
this
.
bNumInterfaces
(),
other
.
bNumInterfaces
())
.
append
(
this
.
bConfigurationValue
(),
other
.
bConfigurationValue
())
.
append
(
this
.
iConfiguration
(),
other
.
iConfiguration
())
.
append
(
this
.
bmAttributes
(),
other
.
bmAttributes
())
.
append
(
this
.
bMaxPower
(),
other
.
bMaxPower
())
.
append
(
this
.
iface
(),
other
.
iface
())
.
append
(
this
.
extra
(),
other
.
extra
())
.
append
(
this
.
extraLength
(),
other
.
extraLength
())
.
isEquals
();
}
@
Override
public
String
toString
()
{
return
this
.
dump
();
}
}
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