Revert 129069 - Import libusb 1.0.9-rc3 into third_party.

third_party/libusb/libusb/libusb.h

Index: third_party/libusb/libusb/libusb.h
===================================================================
--- third_party/libusb/libusb/libusb.h	(revision 129100)
+++ third_party/libusb/libusb/libusb.h	(working copy)
@@ -1,1394 +0,0 @@
-/*
- * Public libusb header file
- * Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
- * Copyright (c) 2001 Johannes Erdfelt <johannes@erdfelt.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef LIBUSB_H
-#define LIBUSB_H
-
-#ifdef _MSC_VER
-/* on MS environments, the inline keyword is available in C++ only */
-#define inline __inline
-/* ssize_t is also not available (copy/paste from MinGW) */
-#ifndef _SSIZE_T_DEFINED
-#define _SSIZE_T_DEFINED
-#undef ssize_t
-#ifdef _WIN64
-  typedef __int64 ssize_t;
-#else
-  typedef int ssize_t;
-#endif /* _WIN64 */
-#endif /* _SSIZE_T_DEFINED */
-#endif /* _MSC_VER */
-
-/* stdint.h is also not usually available on MS */
-#if defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H))
-typedef unsigned __int8   uint8_t;
-typedef unsigned __int16  uint16_t;
-typedef unsigned __int32  uint32_t;
-#else
-#include <stdint.h>
-#endif
-
-#include <sys/types.h>
-#include <time.h>
-#include <limits.h>
-
-#if defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__)
-#include <sys/time.h>
-#endif
-
-/* 'interface' might be defined as a macro on Windows, so we need to
- * undefine it so as not to break the current libusb API, because
- * libusb_config_descriptor has an 'interface' member
- * As this can be problematic if you include windows.h after libusb.h
- * in your sources, we force windows.h to be included first. */
-#if defined(_WIN32) || defined(__CYGWIN__)
-#include <windows.h>
-#if defined(interface)
-#undef interface
-#endif
-#endif
-
-/** \def LIBUSB_CALL
- * \ingroup misc
- * libusb's Windows calling convention.
- *
- * Under Windows, the selection of available compilers and configurations
- * means that, unlike other platforms, there is not <em>one true calling
- * convention</em> (calling convention: the manner in which parameters are
- * passed to funcions in the generated assembly code).
- *
- * Matching the Windows API itself, libusb uses the WINAPI convention (which
- * translates to the <tt>stdcall</tt> convention) and guarantees that the
- * library is compiled in this way. The public header file also includes
- * appropriate annotations so that your own software will use the right
- * convention, even if another convention is being used by default within
- * your codebase.
- *
- * The one consideration that you must apply in your software is to mark
- * all functions which you use as libusb callbacks with this LIBUSB_CALL
- * annotation, so that they too get compiled for the correct calling
- * convention.
- *
- * On non-Windows operating systems, this macro is defined as nothing. This
- * means that you can apply it to your code without worrying about
- * cross-platform compatibility.
- */
-/* LIBUSB_CALL must be defined on both definition and declaration of libusb
- * functions. You'd think that declaration would be enough, but cygwin will
- * complain about conflicting types unless both are marked this way.
- * The placement of this macro is important too; it must appear after the
- * return type, before the function name. See internal documentation for
- * API_EXPORTED.
- */
-#if defined(_WIN32) || defined(__CYGWIN__)
-#define LIBUSB_CALL WINAPI
-#else
-#define LIBUSB_CALL
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** \def libusb_cpu_to_le16
- * \ingroup misc
- * Convert a 16-bit value from host-endian to little-endian format. On
- * little endian systems, this function does nothing. On big endian systems,
- * the bytes are swapped.
- * \param x the host-endian value to convert
- * \returns the value in little-endian byte order
- */
-static inline uint16_t libusb_cpu_to_le16(const uint16_t x)
-{
-	union {
-		uint8_t  b8[2];
-		uint16_t b16;
-	} _tmp;
-	_tmp.b8[1] = x >> 8;
-	_tmp.b8[0] = x & 0xff;
-	return _tmp.b16;
-}
-
-/** \def libusb_le16_to_cpu
- * \ingroup misc
- * Convert a 16-bit value from little-endian to host-endian format. On
- * little endian systems, this function does nothing. On big endian systems,
- * the bytes are swapped.
- * \param x the little-endian value to convert
- * \returns the value in host-endian byte order
- */
-#define libusb_le16_to_cpu libusb_cpu_to_le16
-
-/* standard USB stuff */
-
-/** \ingroup desc
- * Device and/or Interface Class codes */
-enum libusb_class_code {
-	/** In the context of a \ref libusb_device_descriptor "device descriptor",
-	 * this bDeviceClass value indicates that each interface specifies its
-	 * own class information and all interfaces operate independently.
-	 */
-	LIBUSB_CLASS_PER_INTERFACE = 0,
-
-	/** Audio class */
-	LIBUSB_CLASS_AUDIO = 1,
-
-	/** Communications class */
-	LIBUSB_CLASS_COMM = 2,
-
-	/** Human Interface Device class */
-	LIBUSB_CLASS_HID = 3,
-
-	/** Physical */
-	LIBUSB_CLASS_PHYSICAL = 5,
-
-	/** Printer class */
-	LIBUSB_CLASS_PRINTER = 7,
-
-	/** Image class */
-	LIBUSB_CLASS_PTP = 6, /* legacy name from libusb-0.1 usb.h */
-	LIBUSB_CLASS_IMAGE = 6,
-
-	/** Mass storage class */
-	LIBUSB_CLASS_MASS_STORAGE = 8,
-
-	/** Hub class */
-	LIBUSB_CLASS_HUB = 9,
-
-	/** Data class */
-	LIBUSB_CLASS_DATA = 10,
-
-	/** Smart Card */
-	LIBUSB_CLASS_SMART_CARD = 0x0b,
-
-	/** Content Security */
-	LIBUSB_CLASS_CONTENT_SECURITY = 0x0d,
-
-	/** Video */
-	LIBUSB_CLASS_VIDEO = 0x0e,
-
-	/** Personal Healthcare */
-	LIBUSB_CLASS_PERSONAL_HEALTHCARE = 0x0f,
-
-	/** Diagnostic Device */
-	LIBUSB_CLASS_DIAGNOSTIC_DEVICE = 0xdc,
-
-	/** Wireless class */
-	LIBUSB_CLASS_WIRELESS = 0xe0,
-
-	/** Application class */
-	LIBUSB_CLASS_APPLICATION = 0xfe,
-
-	/** Class is vendor-specific */
-	LIBUSB_CLASS_VENDOR_SPEC = 0xff
-};
-
-/** \ingroup desc
- * Descriptor types as defined by the USB specification. */
-enum libusb_descriptor_type {
-	/** Device descriptor. See libusb_device_descriptor. */
-	LIBUSB_DT_DEVICE = 0x01,
-
-	/** Configuration descriptor. See libusb_config_descriptor. */
-	LIBUSB_DT_CONFIG = 0x02,
-
-	/** String descriptor */
-	LIBUSB_DT_STRING = 0x03,
-
-	/** Interface descriptor. See libusb_interface_descriptor. */
-	LIBUSB_DT_INTERFACE = 0x04,
-
-	/** Endpoint descriptor. See libusb_endpoint_descriptor. */
-	LIBUSB_DT_ENDPOINT = 0x05,
-
-	/** HID descriptor */
-	LIBUSB_DT_HID = 0x21,
-
-	/** HID report descriptor */
-	LIBUSB_DT_REPORT = 0x22,
-
-	/** Physical descriptor */
-	LIBUSB_DT_PHYSICAL = 0x23,
-
-	/** Hub descriptor */
-	LIBUSB_DT_HUB = 0x29
-};
-
-/* Descriptor sizes per descriptor type */
-#define LIBUSB_DT_DEVICE_SIZE			18
-#define LIBUSB_DT_CONFIG_SIZE			9
-#define LIBUSB_DT_INTERFACE_SIZE		9
-#define LIBUSB_DT_ENDPOINT_SIZE		7
-#define LIBUSB_DT_ENDPOINT_AUDIO_SIZE	9	/* Audio extension */
-#define LIBUSB_DT_HUB_NONVAR_SIZE		7
-
-#define LIBUSB_ENDPOINT_ADDRESS_MASK	0x0f    /* in bEndpointAddress */
-#define LIBUSB_ENDPOINT_DIR_MASK		0x80
-
-/** \ingroup desc
- * Endpoint direction. Values for bit 7 of the
- * \ref libusb_endpoint_descriptor::bEndpointAddress "endpoint address" scheme.
- */
-enum libusb_endpoint_direction {
-	/** In: device-to-host */
-	LIBUSB_ENDPOINT_IN = 0x80,
-
-	/** Out: host-to-device */
-	LIBUSB_ENDPOINT_OUT = 0x00
-};
-
-#define LIBUSB_TRANSFER_TYPE_MASK			0x03    /* in bmAttributes */
-
-/** \ingroup desc
- * Endpoint transfer type. Values for bits 0:1 of the
- * \ref libusb_endpoint_descriptor::bmAttributes "endpoint attributes" field.
- */
-enum libusb_transfer_type {
-	/** Control endpoint */
-	LIBUSB_TRANSFER_TYPE_CONTROL = 0,
-
-	/** Isochronous endpoint */
-	LIBUSB_TRANSFER_TYPE_ISOCHRONOUS = 1,
-
-	/** Bulk endpoint */
-	LIBUSB_TRANSFER_TYPE_BULK = 2,
-
-	/** Interrupt endpoint */
-	LIBUSB_TRANSFER_TYPE_INTERRUPT = 3
-};
-
-/** \ingroup misc
- * Standard requests, as defined in table 9-3 of the USB2 specifications */
-enum libusb_standard_request {
-	/** Request status of the specific recipient */
-	LIBUSB_REQUEST_GET_STATUS = 0x00,
-
-	/** Clear or disable a specific feature */
-	LIBUSB_REQUEST_CLEAR_FEATURE = 0x01,
-
-	/* 0x02 is reserved */
-
-	/** Set or enable a specific feature */
-	LIBUSB_REQUEST_SET_FEATURE = 0x03,
-
-	/* 0x04 is reserved */
-
-	/** Set device address for all future accesses */
-	LIBUSB_REQUEST_SET_ADDRESS = 0x05,
-
-	/** Get the specified descriptor */
-	LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06,
-
-	/** Used to update existing descriptors or add new descriptors */
-	LIBUSB_REQUEST_SET_DESCRIPTOR = 0x07,
-
-	/** Get the current device configuration value */
-	LIBUSB_REQUEST_GET_CONFIGURATION = 0x08,
-
-	/** Set device configuration */
-	LIBUSB_REQUEST_SET_CONFIGURATION = 0x09,
-
-	/** Return the selected alternate setting for the specified interface */
-	LIBUSB_REQUEST_GET_INTERFACE = 0x0A,
-
-	/** Select an alternate interface for the specified interface */
-	LIBUSB_REQUEST_SET_INTERFACE = 0x0B,
-
-	/** Set then report an endpoint's synchronization frame */
-	LIBUSB_REQUEST_SYNCH_FRAME = 0x0C
-};
-
-/** \ingroup misc
- * Request type bits of the
- * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control
- * transfers. */
-enum libusb_request_type {
-	/** Standard */
-	LIBUSB_REQUEST_TYPE_STANDARD = (0x00 << 5),
-
-	/** Class */
-	LIBUSB_REQUEST_TYPE_CLASS = (0x01 << 5),
-
-	/** Vendor */
-	LIBUSB_REQUEST_TYPE_VENDOR = (0x02 << 5),
-
-	/** Reserved */
-	LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5)
-};
-
-/** \ingroup misc
- * Recipient bits of the
- * \ref libusb_control_setup::bmRequestType "bmRequestType" field in control
- * transfers. Values 4 through 31 are reserved. */
-enum libusb_request_recipient {
-	/** Device */
-	LIBUSB_RECIPIENT_DEVICE = 0x00,
-
-	/** Interface */
-	LIBUSB_RECIPIENT_INTERFACE = 0x01,
-
-	/** Endpoint */
-	LIBUSB_RECIPIENT_ENDPOINT = 0x02,
-
-	/** Other */
-	LIBUSB_RECIPIENT_OTHER = 0x03
-};
-
-#define LIBUSB_ISO_SYNC_TYPE_MASK		0x0C
-
-/** \ingroup desc
- * Synchronization type for isochronous endpoints. Values for bits 2:3 of the
- * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in
- * libusb_endpoint_descriptor.
- */
-enum libusb_iso_sync_type {
-	/** No synchronization */
-	LIBUSB_ISO_SYNC_TYPE_NONE = 0,
-
-	/** Asynchronous */
-	LIBUSB_ISO_SYNC_TYPE_ASYNC = 1,
-
-	/** Adaptive */
-	LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 2,
-
-	/** Synchronous */
-	LIBUSB_ISO_SYNC_TYPE_SYNC = 3
-};
-
-#define LIBUSB_ISO_USAGE_TYPE_MASK 0x30
-
-/** \ingroup desc
- * Usage type for isochronous endpoints. Values for bits 4:5 of the
- * \ref libusb_endpoint_descriptor::bmAttributes "bmAttributes" field in
- * libusb_endpoint_descriptor.
- */
-enum libusb_iso_usage_type {
-	/** Data endpoint */
-	LIBUSB_ISO_USAGE_TYPE_DATA = 0,
-
-	/** Feedback endpoint */
-	LIBUSB_ISO_USAGE_TYPE_FEEDBACK = 1,
-
-	/** Implicit feedback Data endpoint */
-	LIBUSB_ISO_USAGE_TYPE_IMPLICIT = 2
-};
-
-/** \ingroup desc
- * A structure representing the standard USB device descriptor. This
- * descriptor is documented in section 9.6.1 of the USB 2.0 specification.
- * All multiple-byte fields are represented in host-endian format.
- */
-struct libusb_device_descriptor {
-	/** Size of this descriptor (in bytes) */
-	uint8_t  bLength;
-
-	/** Descriptor type. Will have value
-	 * \ref libusb_descriptor_type::LIBUSB_DT_DEVICE LIBUSB_DT_DEVICE in this
-	 * context. */
-	uint8_t  bDescriptorType;
-
-	/** USB specification release number in binary-coded decimal. A value of
-	 * 0x0200 indicates USB 2.0, 0x0110 indicates USB 1.1, etc. */
-	uint16_t bcdUSB;
-
-	/** USB-IF class code for the device. See \ref libusb_class_code. */
-	uint8_t  bDeviceClass;
-
-	/** USB-IF subclass code for the device, qualified by the bDeviceClass
-	 * value */
-	uint8_t  bDeviceSubClass;
-
-	/** USB-IF protocol code for the device, qualified by the bDeviceClass and
-	 * bDeviceSubClass values */
-	uint8_t  bDeviceProtocol;
-
-	/** Maximum packet size for endpoint 0 */
-	uint8_t  bMaxPacketSize0;
-
-	/** USB-IF vendor ID */
-	uint16_t idVendor;
-
-	/** USB-IF product ID */
-	uint16_t idProduct;
-
-	/** Device release number in binary-coded decimal */
-	uint16_t bcdDevice;
-
-	/** Index of string descriptor describing manufacturer */
-	uint8_t  iManufacturer;
-
-	/** Index of string descriptor describing product */
-	uint8_t  iProduct;
-
-	/** Index of string descriptor containing device serial number */
-	uint8_t  iSerialNumber;
-
-	/** Number of possible configurations */
-	uint8_t  bNumConfigurations;
-};
-
-/** \ingroup desc
- * A structure representing the standard USB endpoint descriptor. This
- * descriptor is documented in section 9.6.3 of the USB 2.0 specification.
- * All multiple-byte fields are represented in host-endian format.
- */
-struct libusb_endpoint_descriptor {
-	/** Size of this descriptor (in bytes) */
-	uint8_t  bLength;
-
-	/** Descriptor type. Will have value
-	 * \ref libusb_descriptor_type::LIBUSB_DT_ENDPOINT LIBUSB_DT_ENDPOINT in
-	 * this context. */
-	uint8_t  bDescriptorType;
-
-	/** The address of the endpoint described by this descriptor. Bits 0:3 are
-	 * the endpoint number. Bits 4:6 are reserved. Bit 7 indicates direction,
-	 * see \ref libusb_endpoint_direction.
-	 */
-	uint8_t  bEndpointAddress;
-
-	/** Attributes which apply to the endpoint when it is configured using
-	 * the bConfigurationValue. Bits 0:1 determine the transfer type and
-	 * correspond to \ref libusb_transfer_type. Bits 2:3 are only used for
-	 * isochronous endpoints and correspond to \ref libusb_iso_sync_type.
-	 * Bits 4:5 are also only used for isochronous endpoints and correspond to
-	 * \ref libusb_iso_usage_type. Bits 6:7 are reserved.
-	 */
-	uint8_t  bmAttributes;
-
-	/** Maximum packet size this endpoint is capable of sending/receiving. */
-	uint16_t wMaxPacketSize;
-
-	/** Interval for polling endpoint for data transfers. */
-	uint8_t  bInterval;
-
-	/** For audio devices only: the rate at which synchronization feedback
-	 * is provided. */
-	uint8_t  bRefresh;
-
-	/** For audio devices only: the address if the synch endpoint */
-	uint8_t  bSynchAddress;
-
-	/** Extra descriptors. If libusb encounters unknown endpoint descriptors,
-	 * it will store them here, should you wish to parse them. */
-	const unsigned char *extra;
-
-	/** Length of the extra descriptors, in bytes. */
-	int extra_length;
-};
-
-/** \ingroup desc
- * A structure representing the standard USB interface descriptor. This
- * descriptor is documented in section 9.6.5 of the USB 2.0 specification.
- * All multiple-byte fields are represented in host-endian format.
- */
-struct libusb_interface_descriptor {
-	/** Size of this descriptor (in bytes) */
-	uint8_t  bLength;
-
-	/** Descriptor type. Will have value
-	 * \ref libusb_descriptor_type::LIBUSB_DT_INTERFACE LIBUSB_DT_INTERFACE
-	 * in this context. */
-	uint8_t  bDescriptorType;
-
-	/** Number of this interface */
-	uint8_t  bInterfaceNumber;
-
-	/** Value used to select this alternate setting for this interface */
-	uint8_t  bAlternateSetting;
-
-	/** Number of endpoints used by this interface (excluding the control
-	 * endpoint). */
-	uint8_t  bNumEndpoints;
-
-	/** USB-IF class code for this interface. See \ref libusb_class_code. */
-	uint8_t  bInterfaceClass;
-
-	/** USB-IF subclass code for this interface, qualified by the
-	 * bInterfaceClass value */
-	uint8_t  bInterfaceSubClass;
-
-	/** USB-IF protocol code for this interface, qualified by the
-	 * bInterfaceClass and bInterfaceSubClass values */
-	uint8_t  bInterfaceProtocol;
-
-	/** Index of string descriptor describing this interface */
-	uint8_t  iInterface;
-
-	/** Array of endpoint descriptors. This length of this array is determined
-	 * by the bNumEndpoints field. */
-	const struct libusb_endpoint_descriptor *endpoint;
-
-	/** Extra descriptors. If libusb encounters unknown interface descriptors,
-	 * it will store them here, should you wish to parse them. */
-	const unsigned char *extra;
-
-	/** Length of the extra descriptors, in bytes. */
-	int extra_length;
-};
-
-/** \ingroup desc
- * A collection of alternate settings for a particular USB interface.
- */
-struct libusb_interface {
-	/** Array of interface descriptors. The length of this array is determined
-	 * by the num_altsetting field. */
-	const struct libusb_interface_descriptor *altsetting;
-
-	/** The number of alternate settings that belong to this interface */
-	int num_altsetting;
-};
-
-/** \ingroup desc
- * A structure representing the standard USB configuration descriptor. This
- * descriptor is documented in section 9.6.3 of the USB 2.0 specification.
- * All multiple-byte fields are represented in host-endian format.
- */
-struct libusb_config_descriptor {
-	/** Size of this descriptor (in bytes) */
-	uint8_t  bLength;
-
-	/** Descriptor type. Will have value
-	 * \ref libusb_descriptor_type::LIBUSB_DT_CONFIG LIBUSB_DT_CONFIG
-	 * in this context. */
-	uint8_t  bDescriptorType;
-
-	/** Total length of data returned for this configuration */
-	uint16_t wTotalLength;
-
-	/** Number of interfaces supported by this configuration */
-	uint8_t  bNumInterfaces;
-
-	/** Identifier value for this configuration */
-	uint8_t  bConfigurationValue;
-
-	/** Index of string descriptor describing this configuration */
-	uint8_t  iConfiguration;
-
-	/** Configuration characteristics */
-	uint8_t  bmAttributes;
-
-	/** Maximum power consumption of the USB device from this bus in this
-	 * configuration when the device is fully opreation. Expressed in units
-	 * of 2 mA. */
-	uint8_t  MaxPower;
-
-	/** Array of interfaces supported by this configuration. The length of
-	 * this array is determined by the bNumInterfaces field. */
-	const struct libusb_interface *interface;
-
-	/** Extra descriptors. If libusb encounters unknown configuration
-	 * descriptors, it will store them here, should you wish to parse them. */
-	const unsigned char *extra;
-
-	/** Length of the extra descriptors, in bytes. */
-	int extra_length;
-};
-
-/** \ingroup asyncio
- * Setup packet for control transfers. */
-struct libusb_control_setup {
-	/** Request type. Bits 0:4 determine recipient, see
-	 * \ref libusb_request_recipient. Bits 5:6 determine type, see
-	 * \ref libusb_request_type. Bit 7 determines data transfer direction, see
-	 * \ref libusb_endpoint_direction.
-	 */
-	uint8_t  bmRequestType;
-
-	/** Request. If the type bits of bmRequestType are equal to
-	 * \ref libusb_request_type::LIBUSB_REQUEST_TYPE_STANDARD
-	 * "LIBUSB_REQUEST_TYPE_STANDARD" then this field refers to
-	 * \ref libusb_standard_request. For other cases, use of this field is
-	 * application-specific. */
-	uint8_t  bRequest;
-
-	/** Value. Varies according to request */
-	uint16_t wValue;
-
-	/** Index. Varies according to request, typically used to pass an index
-	 * or offset */
-	uint16_t wIndex;
-
-	/** Number of bytes to transfer */
-	uint16_t wLength;
-};
-
-#define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup))
-
-/* libusb */
-
-struct libusb_context;
-struct libusb_device;
-struct libusb_device_handle;
-
-/** \ingroup lib
- * Structure representing a libusb session. The concept of individual libusb
- * sessions allows for your program to use two libraries (or dynamically
- * load two modules) which both independently use libusb. This will prevent
- * interference between the individual libusb users - for example
- * libusb_set_debug() will not affect the other user of the library, and
- * libusb_exit() will not destroy resources that the other user is still
- * using.
- *
- * Sessions are created by libusb_init() and destroyed through libusb_exit().
- * If your application is guaranteed to only ever include a single libusb
- * user (i.e. you), you do not have to worry about contexts: pass NULL in
- * every function call where a context is required. The default context
- * will be used.
- *
- * For more information, see \ref contexts.
- */
-typedef struct libusb_context libusb_context;
-
-/** \ingroup dev
- * Structure representing a USB device detected on the system. This is an
- * opaque type for which you are only ever provided with a pointer, usually
- * originating from libusb_get_device_list().
- *
- * Certain operations can be performed on a device, but in order to do any
- * I/O you will have to first obtain a device handle using libusb_open().
- *
- * Devices are reference counted with libusb_device_ref() and
- * libusb_device_unref(), and are freed when the reference count reaches 0.
- * New devices presented by libusb_get_device_list() have a reference count of
- * 1, and libusb_free_device_list() can optionally decrease the reference count
- * on all devices in the list. libusb_open() adds another reference which is
- * later destroyed by libusb_close().
- */
-typedef struct libusb_device libusb_device;
-
-
-/** \ingroup dev
- * Structure representing a handle on a USB device. This is an opaque type for
- * which you are only ever provided with a pointer, usually originating from
- * libusb_open().
- *
- * A device handle is used to perform I/O and other operations. When finished
- * with a device handle, you should call libusb_close().
- */
-typedef struct libusb_device_handle libusb_device_handle;
-
-/** \ingroup dev
- * Speed codes. Indicates the speed at which the device is operating.
- */
-enum libusb_speed {
-    /** The OS doesn't report or know the device speed. */
-    LIBUSB_SPEED_UNKNOWN = 0,
-
-    /** The device is operating at low speed (1.5MBit/s). */
-    LIBUSB_SPEED_LOW = 1,
-
-    /** The device is operating at full speed (12MBit/s). */
-    LIBUSB_SPEED_FULL = 2,
-
-    /** The device is operating at high speed (480MBit/s). */
-    LIBUSB_SPEED_HIGH = 3,
-
-    /** The device is operating at super speed (5000MBit/s). */
-    LIBUSB_SPEED_SUPER = 4,
-};
-
-/** \ingroup misc
- * Error codes. Most libusb functions return 0 on success or one of these
- * codes on failure.
- * You can call \ref libusb_error_name() to retrieve a string representation
- * of an error code.
- */
-enum libusb_error {
-	/** Success (no error) */
-	LIBUSB_SUCCESS = 0,
-
-	/** Input/output error */
-	LIBUSB_ERROR_IO = -1,
-
-	/** Invalid parameter */
-	LIBUSB_ERROR_INVALID_PARAM = -2,
-
-	/** Access denied (insufficient permissions) */
-	LIBUSB_ERROR_ACCESS = -3,
-
-	/** No such device (it may have been disconnected) */
-	LIBUSB_ERROR_NO_DEVICE = -4,
-
-	/** Entity not found */
-	LIBUSB_ERROR_NOT_FOUND = -5,
-
-	/** Resource busy */
-	LIBUSB_ERROR_BUSY = -6,
-
-	/** Operation timed out */
-	LIBUSB_ERROR_TIMEOUT = -7,
-
-	/** Overflow */
-	LIBUSB_ERROR_OVERFLOW = -8,
-
-	/** Pipe error */
-	LIBUSB_ERROR_PIPE = -9,
-
-	/** System call interrupted (perhaps due to signal) */
-	LIBUSB_ERROR_INTERRUPTED = -10,
-
-	/** Insufficient memory */
-	LIBUSB_ERROR_NO_MEM = -11,
-
-	/** Operation not supported or unimplemented on this platform */
-	LIBUSB_ERROR_NOT_SUPPORTED = -12,
-
-	/* NB! Remember to update libusb_error_name()
-	   when adding new error codes here. */
-
-	/** Other error */
-	LIBUSB_ERROR_OTHER = -99
-};
-
-/** \ingroup asyncio
- * Transfer status codes */
-enum libusb_transfer_status {
-	/** Transfer completed without error. Note that this does not indicate
-	 * that the entire amount of requested data was transferred. */
-	LIBUSB_TRANSFER_COMPLETED,
-
-	/** Transfer failed */
-	LIBUSB_TRANSFER_ERROR,
-
-	/** Transfer timed out */
-	LIBUSB_TRANSFER_TIMED_OUT,
-
-	/** Transfer was cancelled */
-	LIBUSB_TRANSFER_CANCELLED,
-
-	/** For bulk/interrupt endpoints: halt condition detected (endpoint
-	 * stalled). For control endpoints: control request not supported. */
-	LIBUSB_TRANSFER_STALL,
-
-	/** Device was disconnected */
-	LIBUSB_TRANSFER_NO_DEVICE,
-
-	/** Device sent more data than requested */
-	LIBUSB_TRANSFER_OVERFLOW
-};
-
-/** \ingroup asyncio
- * libusb_transfer.flags values */
-enum libusb_transfer_flags {
-	/** Report short frames as errors */
-	LIBUSB_TRANSFER_SHORT_NOT_OK = 1<<0,
-
-	/** Automatically free() transfer buffer during libusb_free_transfer() */
-	LIBUSB_TRANSFER_FREE_BUFFER = 1<<1,
-
-	/** Automatically call libusb_free_transfer() after callback returns.
-	 * If this flag is set, it is illegal to call libusb_free_transfer()
-	 * from your transfer callback, as this will result in a double-free
-	 * when this flag is acted upon. */
-	LIBUSB_TRANSFER_FREE_TRANSFER = 1<<2
-};
-
-/** \ingroup asyncio
- * Isochronous packet descriptor. */
-struct libusb_iso_packet_descriptor {
-	/** Length of data to request in this packet */
-	unsigned int length;
-
-	/** Amount of data that was actually transferred */
-	unsigned int actual_length;
-
-	/** Status code for this packet */
-	enum libusb_transfer_status status;
-};
-
-struct libusb_transfer;
-
-/** \ingroup asyncio
- * Asynchronous transfer callback function type. When submitting asynchronous
- * transfers, you pass a pointer to a callback function of this type via the
- * \ref libusb_transfer::callback "callback" member of the libusb_transfer
- * structure. libusb will call this function later, when the transfer has
- * completed or failed. See \ref asyncio for more information.
- * \param transfer The libusb_transfer struct the callback function is being
- * notified about.
- */
-typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer);
-
-/** \ingroup asyncio
- * The generic USB transfer structure. The user populates this structure and
- * then submits it in order to request a transfer. After the transfer has
- * completed, the library populates the transfer with the results and passes
- * it back to the user.
- */
-struct libusb_transfer {
-	/** Handle of the device that this transfer will be submitted to */
-	libusb_device_handle *dev_handle;
-
-	/** A bitwise OR combination of \ref libusb_transfer_flags. */
-	uint8_t flags;
-
-	/** Address of the endpoint where this transfer will be sent. */
-	unsigned char endpoint;
-
-	/** Type of the endpoint from \ref libusb_transfer_type */
-	unsigned char type;
-
-	/** Timeout for this transfer in millseconds. A value of 0 indicates no
-	 * timeout. */
-	unsigned int timeout;
-
-	/** The status of the transfer. Read-only, and only for use within
-	 * transfer callback function.
-	 *
-	 * If this is an isochronous transfer, this field may read COMPLETED even
-	 * if there were errors in the frames. Use the
-	 * \ref libusb_iso_packet_descriptor::status "status" field in each packet
-	 * to determine if errors occurred. */
-	enum libusb_transfer_status status;
-
-	/** Length of the data buffer */
-	int length;
-
-	/** Actual length of data that was transferred. Read-only, and only for
-	 * use within transfer callback function. Not valid for isochronous
-	 * endpoint transfers. */
-	int actual_length;
-
-	/** Callback function. This will be invoked when the transfer completes,
-	 * fails, or is cancelled. */
-	libusb_transfer_cb_fn callback;
-
-	/** User context data to pass to the callback function. */
-	void *user_data;
-
-	/** Data buffer */
-	unsigned char *buffer;
-
-	/** Number of isochronous packets. Only used for I/O with isochronous
-	 * endpoints. */
-	int num_iso_packets;
-
-	/** Isochronous packet descriptors, for isochronous transfers only. */
-	struct libusb_iso_packet_descriptor iso_packet_desc
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
-	[] /* valid C99 code */
-#else
-	[0] /* non-standard, but usually working code */
-#endif
-	;
-};
-
-/** \ingroup misc
- * Capabilities supported by this instance of libusb. Test if the running
- * library supports a given capability by calling
- * \ref libusb_has_capability().
- */
-enum libusb_capability {
-	/** The libusb_get_device_speed() API is available. */
-	LIBUSB_CAN_GET_DEVICE_SPEED = 0,
-};
-
-int LIBUSB_CALL libusb_init(libusb_context **ctx);
-void LIBUSB_CALL libusb_exit(libusb_context *ctx);
-void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level);
-int LIBUSB_CALL libusb_has_capability(uint32_t capability);
-const char * LIBUSB_CALL libusb_error_name(int errcode);
-
-ssize_t LIBUSB_CALL libusb_get_device_list(libusb_context *ctx,
-	libusb_device ***list);
-void LIBUSB_CALL libusb_free_device_list(libusb_device **list,
-	int unref_devices);
-libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev);
-void LIBUSB_CALL libusb_unref_device(libusb_device *dev);
-
-int LIBUSB_CALL libusb_get_configuration(libusb_device_handle *dev,
-	int *config);
-int LIBUSB_CALL libusb_get_device_descriptor(libusb_device *dev,
-	struct libusb_device_descriptor *desc);
-int LIBUSB_CALL libusb_get_active_config_descriptor(libusb_device *dev,
-	struct libusb_config_descriptor **config);
-int LIBUSB_CALL libusb_get_config_descriptor(libusb_device *dev,
-	uint8_t config_index, struct libusb_config_descriptor **config);
-int LIBUSB_CALL libusb_get_config_descriptor_by_value(libusb_device *dev,
-	uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
-void LIBUSB_CALL libusb_free_config_descriptor(
-	struct libusb_config_descriptor *config);
-uint8_t LIBUSB_CALL libusb_get_bus_number(libusb_device *dev);
-uint8_t LIBUSB_CALL libusb_get_device_address(libusb_device *dev);
-int LIBUSB_CALL libusb_get_device_speed(libusb_device *dev);
-int LIBUSB_CALL libusb_get_max_packet_size(libusb_device *dev,
-	unsigned char endpoint);
-int LIBUSB_CALL libusb_get_max_iso_packet_size(libusb_device *dev,
-	unsigned char endpoint);
-
-int LIBUSB_CALL libusb_open(libusb_device *dev, libusb_device_handle **handle);
-void LIBUSB_CALL libusb_close(libusb_device_handle *dev_handle);
-libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle);
-
-int LIBUSB_CALL libusb_set_configuration(libusb_device_handle *dev,
-	int configuration);
-int LIBUSB_CALL libusb_claim_interface(libusb_device_handle *dev,
-	int interface_number);
-int LIBUSB_CALL libusb_release_interface(libusb_device_handle *dev,
-	int interface_number);
-
-libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid(
-	libusb_context *ctx, uint16_t vendor_id, uint16_t product_id);
-
-int LIBUSB_CALL libusb_set_interface_alt_setting(libusb_device_handle *dev,
-	int interface_number, int alternate_setting);
-int LIBUSB_CALL libusb_clear_halt(libusb_device_handle *dev,
-	unsigned char endpoint);
-int LIBUSB_CALL libusb_reset_device(libusb_device_handle *dev);
-
-int LIBUSB_CALL libusb_kernel_driver_active(libusb_device_handle *dev,
-	int interface_number);
-int LIBUSB_CALL libusb_detach_kernel_driver(libusb_device_handle *dev,
-	int interface_number);
-int LIBUSB_CALL libusb_attach_kernel_driver(libusb_device_handle *dev,
-	int interface_number);
-
-/* async I/O */
-
-/** \ingroup asyncio
- * Get the data section of a control transfer. This convenience function is here
- * to remind you that the data does not start until 8 bytes into the actual
- * buffer, as the setup packet comes first.
- *
- * Calling this function only makes sense from a transfer callback function,
- * or situations where you have already allocated a suitably sized buffer at
- * transfer->buffer.
- *
- * \param transfer a transfer
- * \returns pointer to the first byte of the data section
- */
-static inline unsigned char *libusb_control_transfer_get_data(
-	struct libusb_transfer *transfer)
-{
-	return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
-}
-
-/** \ingroup asyncio
- * Get the control setup packet of a control transfer. This convenience
- * function is here to remind you that the control setup occupies the first
- * 8 bytes of the transfer data buffer.
- *
- * Calling this function only makes sense from a transfer callback function,
- * or situations where you have already allocated a suitably sized buffer at
- * transfer->buffer.
- *
- * \param transfer a transfer
- * \returns a casted pointer to the start of the transfer data buffer
- */
-static inline struct libusb_control_setup *libusb_control_transfer_get_setup(
-	struct libusb_transfer *transfer)
-{
-	return (struct libusb_control_setup *) transfer->buffer;
-}
-
-/** \ingroup asyncio
- * Helper function to populate the setup packet (first 8 bytes of the data
- * buffer) for a control transfer. The wIndex, wValue and wLength values should
- * be given in host-endian byte order.
- *
- * \param buffer buffer to output the setup packet into
- * \param bmRequestType see the
- * \ref libusb_control_setup::bmRequestType "bmRequestType" field of
- * \ref libusb_control_setup
- * \param bRequest see the
- * \ref libusb_control_setup::bRequest "bRequest" field of
- * \ref libusb_control_setup
- * \param wValue see the
- * \ref libusb_control_setup::wValue "wValue" field of
- * \ref libusb_control_setup
- * \param wIndex see the
- * \ref libusb_control_setup::wIndex "wIndex" field of
- * \ref libusb_control_setup
- * \param wLength see the
- * \ref libusb_control_setup::wLength "wLength" field of
- * \ref libusb_control_setup
- */
-static inline void libusb_fill_control_setup(unsigned char *buffer,
-	uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
-	uint16_t wLength)
-{
-	struct libusb_control_setup *setup = (struct libusb_control_setup *) buffer;
-	setup->bmRequestType = bmRequestType;
-	setup->bRequest = bRequest;
-	setup->wValue = libusb_cpu_to_le16(wValue);
-	setup->wIndex = libusb_cpu_to_le16(wIndex);
-	setup->wLength = libusb_cpu_to_le16(wLength);
-}
-
-struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer(int iso_packets);
-int LIBUSB_CALL libusb_submit_transfer(struct libusb_transfer *transfer);
-int LIBUSB_CALL libusb_cancel_transfer(struct libusb_transfer *transfer);
-void LIBUSB_CALL libusb_free_transfer(struct libusb_transfer *transfer);
-
-/** \ingroup asyncio
- * Helper function to populate the required \ref libusb_transfer fields
- * for a control transfer.
- *
- * If you pass a transfer buffer to this function, the first 8 bytes will
- * be interpreted as a control setup packet, and the wLength field will be
- * used to automatically populate the \ref libusb_transfer::length "length"
- * field of the transfer. Therefore the recommended approach is:
- * -# Allocate a suitably sized data buffer (including space for control setup)
- * -# Call libusb_fill_control_setup()
- * -# If this is a host-to-device transfer with a data stage, put the data
- *    in place after the setup packet
- * -# Call this function
- * -# Call libusb_submit_transfer()
- *
- * It is also legal to pass a NULL buffer to this function, in which case this
- * function will not attempt to populate the length field. Remember that you
- * must then populate the buffer and length fields later.
- *
- * \param transfer the transfer to populate
- * \param dev_handle handle of the device that will handle the transfer
- * \param buffer data buffer. If provided, this function will interpret the
- * first 8 bytes as a setup packet and infer the transfer length from that.
- * \param callback callback function to be invoked on transfer completion
- * \param user_data user data to pass to callback function
- * \param timeout timeout for the transfer in milliseconds
- */
-static inline void libusb_fill_control_transfer(
-	struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
-	unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data,
-	unsigned int timeout)
-{
-	struct libusb_control_setup *setup = (struct libusb_control_setup *) buffer;
-	transfer->dev_handle = dev_handle;
-	transfer->endpoint = 0;
-	transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL;
-	transfer->timeout = timeout;
-	transfer->buffer = buffer;
-	if (setup)
-		transfer->length = LIBUSB_CONTROL_SETUP_SIZE
-			+ libusb_le16_to_cpu(setup->wLength);
-	transfer->user_data = user_data;
-	transfer->callback = callback;
-}
-
-/** \ingroup asyncio
- * Helper function to populate the required \ref libusb_transfer fields
- * for a bulk transfer.
- *
- * \param transfer the transfer to populate
- * \param dev_handle handle of the device that will handle the transfer
- * \param endpoint address of the endpoint where this transfer will be sent
- * \param buffer data buffer
- * \param length length of data buffer
- * \param callback callback function to be invoked on transfer completion
- * \param user_data user data to pass to callback function
- * \param timeout timeout for the transfer in milliseconds
- */
-static inline void libusb_fill_bulk_transfer(struct libusb_transfer *transfer,
-	libusb_device_handle *dev_handle, unsigned char endpoint,
-	unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
-	void *user_data, unsigned int timeout)
-{
-	transfer->dev_handle = dev_handle;
-	transfer->endpoint = endpoint;
-	transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
-	transfer->timeout = timeout;
-	transfer->buffer = buffer;
-	transfer->length = length;
-	transfer->user_data = user_data;
-	transfer->callback = callback;
-}
-
-/** \ingroup asyncio
- * Helper function to populate the required \ref libusb_transfer fields
- * for an interrupt transfer.
- *
- * \param transfer the transfer to populate
- * \param dev_handle handle of the device that will handle the transfer
- * \param endpoint address of the endpoint where this transfer will be sent
- * \param buffer data buffer
- * \param length length of data buffer
- * \param callback callback function to be invoked on transfer completion
- * \param user_data user data to pass to callback function
- * \param timeout timeout for the transfer in milliseconds
- */
-static inline void libusb_fill_interrupt_transfer(
-	struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
-	unsigned char endpoint, unsigned char *buffer, int length,
-	libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
-{
-	transfer->dev_handle = dev_handle;
-	transfer->endpoint = endpoint;
-	transfer->type = LIBUSB_TRANSFER_TYPE_INTERRUPT;
-	transfer->timeout = timeout;
-	transfer->buffer = buffer;
-	transfer->length = length;
-	transfer->user_data = user_data;
-	transfer->callback = callback;
-}
-
-/** \ingroup asyncio
- * Helper function to populate the required \ref libusb_transfer fields
- * for an isochronous transfer.
- *
- * \param transfer the transfer to populate
- * \param dev_handle handle of the device that will handle the transfer
- * \param endpoint address of the endpoint where this transfer will be sent
- * \param buffer data buffer
- * \param length length of data buffer
- * \param num_iso_packets the number of isochronous packets
- * \param callback callback function to be invoked on transfer completion
- * \param user_data user data to pass to callback function
- * \param timeout timeout for the transfer in milliseconds
- */
-static inline void libusb_fill_iso_transfer(struct libusb_transfer *transfer,
-	libusb_device_handle *dev_handle, unsigned char endpoint,
-	unsigned char *buffer, int length, int num_iso_packets,
-	libusb_transfer_cb_fn callback, void *user_data, unsigned int timeout)
-{
-	transfer->dev_handle = dev_handle;
-	transfer->endpoint = endpoint;
-	transfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS;
-	transfer->timeout = timeout;
-	transfer->buffer = buffer;
-	transfer->length = length;
-	transfer->num_iso_packets = num_iso_packets;
-	transfer->user_data = user_data;
-	transfer->callback = callback;
-}
-
-/** \ingroup asyncio
- * Convenience function to set the length of all packets in an isochronous
- * transfer, based on the num_iso_packets field in the transfer structure.
- *
- * \param transfer a transfer
- * \param length the length to set in each isochronous packet descriptor
- * \see libusb_get_max_packet_size()
- */
-static inline void libusb_set_iso_packet_lengths(
-	struct libusb_transfer *transfer, unsigned int length)
-{
-	int i;
-	for (i = 0; i < transfer->num_iso_packets; i++)
-		transfer->iso_packet_desc[i].length = length;
-}
-
-/** \ingroup asyncio
- * Convenience function to locate the position of an isochronous packet
- * within the buffer of an isochronous transfer.
- *
- * This is a thorough function which loops through all preceding packets,
- * accumulating their lengths to find the position of the specified packet.
- * Typically you will assign equal lengths to each packet in the transfer,
- * and hence the above method is sub-optimal. You may wish to use
- * libusb_get_iso_packet_buffer_simple() instead.
- *
- * \param transfer a transfer
- * \param packet the packet to return the address of
- * \returns the base address of the packet buffer inside the transfer buffer,
- * or NULL if the packet does not exist.
- * \see libusb_get_iso_packet_buffer_simple()
- */
-static inline unsigned char *libusb_get_iso_packet_buffer(
-	struct libusb_transfer *transfer, unsigned int packet)
-{
-	int i;
-	size_t offset = 0;
-	int _packet;
-
-	/* oops..slight bug in the API. packet is an unsigned int, but we use
-	 * signed integers almost everywhere else. range-check and convert to
-	 * signed to avoid compiler warnings. FIXME for libusb-2. */
-	if (packet > INT_MAX)
-		return NULL;
-	_packet = packet;
-
-	if (_packet >= transfer->num_iso_packets)
-		return NULL;
-
-	for (i = 0; i < _packet; i++)
-		offset += transfer->iso_packet_desc[i].length;
-
-	return transfer->buffer + offset;
-}
-
-/** \ingroup asyncio
- * Convenience function to locate the position of an isochronous packet
- * within the buffer of an isochronous transfer, for transfers where each
- * packet is of identical size.
- *
- * This function relies on the assumption that every packet within the transfer
- * is of identical size to the first packet. Calculating the location of
- * the packet buffer is then just a simple calculation:
- * <tt>buffer + (packet_size * packet)</tt>
- *
- * Do not use this function on transfers other than those that have identical
- * packet lengths for each packet.
- *
- * \param transfer a transfer
- * \param packet the packet to return the address of
- * \returns the base address of the packet buffer inside the transfer buffer,
- * or NULL if the packet does not exist.
- * \see libusb_get_iso_packet_buffer()
- */
-static inline unsigned char *libusb_get_iso_packet_buffer_simple(
-	struct libusb_transfer *transfer, unsigned int packet)
-{
-	int _packet;
-
-	/* oops..slight bug in the API. packet is an unsigned int, but we use
-	 * signed integers almost everywhere else. range-check and convert to
-	 * signed to avoid compiler warnings. FIXME for libusb-2. */
-	if (packet > INT_MAX)
-		return NULL;
-	_packet = packet;
-
-	if (_packet >= transfer->num_iso_packets)
-		return NULL;
-
-	return transfer->buffer + (transfer->iso_packet_desc[0].length * _packet);
-}
-
-/* sync I/O */
-
-int LIBUSB_CALL libusb_control_transfer(libusb_device_handle *dev_handle,
-	uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex,
-	unsigned char *data, uint16_t wLength, unsigned int timeout);
-
-int LIBUSB_CALL libusb_bulk_transfer(libusb_device_handle *dev_handle,
-	unsigned char endpoint, unsigned char *data, int length,
-	int *actual_length, unsigned int timeout);
-
-int LIBUSB_CALL libusb_interrupt_transfer(libusb_device_handle *dev_handle,
-	unsigned char endpoint, unsigned char *data, int length,
-	int *actual_length, unsigned int timeout);
-
-/** \ingroup desc
- * Retrieve a descriptor from the default control pipe.
- * This is a convenience function which formulates the appropriate control
- * message to retrieve the descriptor.
- *
- * \param dev a device handle
- * \param desc_type the descriptor type, see \ref libusb_descriptor_type
- * \param desc_index the index of the descriptor to retrieve
- * \param data output buffer for descriptor
- * \param length size of data buffer
- * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure
- */
-static inline int libusb_get_descriptor(libusb_device_handle *dev,
-	uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length)
-{
-	return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN,
-		LIBUSB_REQUEST_GET_DESCRIPTOR, (desc_type << 8) | desc_index, 0, data,
-		(uint16_t) length, 1000);
-}
-
-/** \ingroup desc
- * Retrieve a descriptor from a device.
- * This is a convenience function which formulates the appropriate control
- * message to retrieve the descriptor. The string returned is Unicode, as
- * detailed in the USB specifications.
- *
- * \param dev a device handle
- * \param desc_index the index of the descriptor to retrieve
- * \param langid the language ID for the string descriptor
- * \param data output buffer for descriptor
- * \param length size of data buffer
- * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure
- * \see libusb_get_string_descriptor_ascii()
- */
-static inline int libusb_get_string_descriptor(libusb_device_handle *dev,
-	uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
-{
-	return libusb_control_transfer(dev, LIBUSB_ENDPOINT_IN,
-		LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | desc_index,
-		langid, data, (uint16_t) length, 1000);
-}
-
-int LIBUSB_CALL libusb_get_string_descriptor_ascii(libusb_device_handle *dev,
-	uint8_t desc_index, unsigned char *data, int length);
-
-/* polling and timeouts */
-
-int LIBUSB_CALL libusb_try_lock_events(libusb_context *ctx);
-void LIBUSB_CALL libusb_lock_events(libusb_context *ctx);
-void LIBUSB_CALL libusb_unlock_events(libusb_context *ctx);
-int LIBUSB_CALL libusb_event_handling_ok(libusb_context *ctx);
-int LIBUSB_CALL libusb_event_handler_active(libusb_context *ctx);
-void LIBUSB_CALL libusb_lock_event_waiters(libusb_context *ctx);
-void LIBUSB_CALL libusb_unlock_event_waiters(libusb_context *ctx);
-int LIBUSB_CALL libusb_wait_for_event(libusb_context *ctx, struct timeval *tv);
-
-int LIBUSB_CALL libusb_handle_events_timeout(libusb_context *ctx,
-	struct timeval *tv);
-int LIBUSB_CALL libusb_handle_events_timeout_completed(libusb_context *ctx,
-	struct timeval *tv, int *completed);
-int LIBUSB_CALL libusb_handle_events(libusb_context *ctx);
-int LIBUSB_CALL libusb_handle_events_completed(libusb_context *ctx, int *completed);
-int LIBUSB_CALL libusb_handle_events_locked(libusb_context *ctx,
-	struct timeval *tv);
-int LIBUSB_CALL libusb_pollfds_handle_timeouts(libusb_context *ctx);
-int LIBUSB_CALL libusb_get_next_timeout(libusb_context *ctx,
-	struct timeval *tv);
-
-/** \ingroup poll
- * File descriptor for polling
- */
-struct libusb_pollfd {
-	/** Numeric file descriptor */
-	int fd;
-
-	/** Event flags to poll for from <poll.h>. POLLIN indicates that you
-	 * should monitor this file descriptor for becoming ready to read from,
-	 * and POLLOUT indicates that you should monitor this file descriptor for
-	 * nonblocking write readiness. */
-	short events;
-};
-
-/** \ingroup poll
- * Callback function, invoked when a new file descriptor should be added
- * to the set of file descriptors monitored for events.
- * \param fd the new file descriptor
- * \param events events to monitor for, see \ref libusb_pollfd for a
- * description
- * \param user_data User data pointer specified in
- * libusb_set_pollfd_notifiers() call
- * \see libusb_set_pollfd_notifiers()
- */
-typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events,
-	void *user_data);
-
-/** \ingroup poll
- * Callback function, invoked when a file descriptor should be removed from
- * the set of file descriptors being monitored for events. After returning
- * from this callback, do not use that file descriptor again.
- * \param fd the file descriptor to stop monitoring
- * \param user_data User data pointer specified in
- * libusb_set_pollfd_notifiers() call
- * \see libusb_set_pollfd_notifiers()
- */
-typedef void (LIBUSB_CALL *libusb_pollfd_removed_cb)(int fd, void *user_data);
-
-const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds(
-	libusb_context *ctx);
-void LIBUSB_CALL libusb_set_pollfd_notifiers(libusb_context *ctx,
-	libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb,
-	void *user_data);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif