libusb.h

/*
 * Public libusb header file
 * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
 * Copyright © 2007-2008 Daniel Drake <dsd@gentoo.org>
 * Copyright © 2012 Pete Batard <pete@akeo.ie>
 * Copyright © 2012-2023 Nathan Hjelm <hjelmn@cs.unm.edu>
 * Copyright © 2014-2020 Chris Dickens <christopher.a.dickens@gmail.com>
 * For more information, please visit: https://libusb.info
 *
 * 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
 
#if defined(_MSC_VER)
#pragma warning(push)
/* Disable: warning C4200: nonstandard extension used : zero-sized array in struct/union */
#pragma warning(disable:4200)
/* on MS environments, the inline keyword is available in C++ only */
#if !defined(__cplusplus)
#define inline __inline
#endif
/* ssize_t is also not available */
#ifndef _SSIZE_T_DEFINED
#define _SSIZE_T_DEFINED
#include <basetsd.h>
typedef SSIZE_T ssize_t;
#endif /* _SSIZE_T_DEFINED */
#endif /* _MSC_VER */
 
#include <limits.h>
#include <stdint.h>
#include <sys/types.h>
#if !defined(_MSC_VER)
#include <sys/time.h>
#endif
#include <time.h>
 
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
#define LIBUSB_FLEXIBLE_ARRAY       /* [] - valid C99 code */
#else
#define LIBUSB_FLEXIBLE_ARRAY   0   /* [0] - non-standard, but usually working code */
#endif /* __STDC_VERSION__ */
 
/* '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
#if !defined(__CYGWIN__)
#include <winsock.h>
#endif
#endif /* _WIN32 || __CYGWIN__ */
 
#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
#define LIBUSB_DEPRECATED_FOR(f) __attribute__ ((deprecated ("Use " #f " instead")))
#elif defined(__GNUC__) && (__GNUC__ >= 3)
#define LIBUSB_DEPRECATED_FOR(f) __attribute__ ((deprecated))
#elif defined(_MSC_VER)
#define LIBUSB_DEPRECATED_FOR(f) __declspec(deprecated("Use " #f " instead"))
#else
#define LIBUSB_DEPRECATED_FOR(f)
#endif /* __GNUC__ */
 
#if defined(__GNUC__)
#define LIBUSB_PACKED __attribute__ ((packed))
#else
#define LIBUSB_PACKED
#endif /* __GNUC__ */
 
/* 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
#define LIBUSB_CALLV WINAPIV
#else
#define LIBUSB_CALL
#define LIBUSB_CALLV
#endif /* _WIN32 || __CYGWIN__ */
 
#define LIBUSB_API_VERSION 0x0100010A
 
#define LIBUSBX_API_VERSION LIBUSB_API_VERSION
 
#if defined(__cplusplus)
extern "C" {
#endif
 
static inline uint16_t libusb_cpu_to_le16(const uint16_t x)
{
    union {
        uint8_t  b8[2];
        uint16_t b16;
    } _tmp;
    _tmp.b8[1] = (uint8_t) (x >> 8);
    _tmp.b8[0] = (uint8_t) (x & 0xff);
    return _tmp.b16;
}
 
#define libusb_le16_to_cpu libusb_cpu_to_le16
 
/* standard USB stuff */
 
enum libusb_class_code {
    LIBUSB_CLASS_PER_INTERFACE = 0x00,
 
    LIBUSB_CLASS_AUDIO = 0x01,
 
    LIBUSB_CLASS_COMM = 0x02,
 
    LIBUSB_CLASS_HID = 0x03,
 
    LIBUSB_CLASS_PHYSICAL = 0x05,
 
    LIBUSB_CLASS_IMAGE = 0x06,
    LIBUSB_CLASS_PTP = 0x06, /* legacy name from libusb-0.1 usb.h */
 
    LIBUSB_CLASS_PRINTER = 0x07,
 
    LIBUSB_CLASS_MASS_STORAGE = 0x08,
 
    LIBUSB_CLASS_HUB = 0x09,
 
    LIBUSB_CLASS_DATA = 0x0a,
 
    LIBUSB_CLASS_SMART_CARD = 0x0b,
 
    LIBUSB_CLASS_CONTENT_SECURITY = 0x0d,
 
    LIBUSB_CLASS_VIDEO = 0x0e,
 
    LIBUSB_CLASS_PERSONAL_HEALTHCARE = 0x0f,
 
    LIBUSB_CLASS_DIAGNOSTIC_DEVICE = 0xdc,
 
    LIBUSB_CLASS_WIRELESS = 0xe0,
 
    LIBUSB_CLASS_MISCELLANEOUS = 0xef,
 
    LIBUSB_CLASS_APPLICATION = 0xfe,
 
    LIBUSB_CLASS_VENDOR_SPEC = 0xff
};
 
enum libusb_descriptor_type {
    LIBUSB_DT_DEVICE = 0x01,
 
    LIBUSB_DT_CONFIG = 0x02,
 
    LIBUSB_DT_STRING = 0x03,
 
    LIBUSB_DT_INTERFACE = 0x04,
 
    LIBUSB_DT_ENDPOINT = 0x05,
 
    LIBUSB_DT_INTERFACE_ASSOCIATION = 0x0b,
 
    LIBUSB_DT_BOS = 0x0f,
 
    LIBUSB_DT_DEVICE_CAPABILITY = 0x10,
 
    LIBUSB_DT_HID = 0x21,
 
    LIBUSB_DT_REPORT = 0x22,
 
    LIBUSB_DT_PHYSICAL = 0x23,
 
    LIBUSB_DT_HUB = 0x29,
 
    LIBUSB_DT_SUPERSPEED_HUB = 0x2a,
 
    LIBUSB_DT_SS_ENDPOINT_COMPANION = 0x30
};
 
/* 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_DT_SS_ENDPOINT_COMPANION_SIZE    6
#define LIBUSB_DT_BOS_SIZE          5
#define LIBUSB_DT_DEVICE_CAPABILITY_SIZE    3
 
/* BOS descriptor sizes */
#define LIBUSB_BT_USB_2_0_EXTENSION_SIZE    7
#define LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE 10
#define LIBUSB_BT_CONTAINER_ID_SIZE     20
#define LIBUSB_BT_PLATFORM_DESCRIPTOR_MIN_SIZE      20
 
/* We unwrap the BOS => define its max size */
#define LIBUSB_DT_BOS_MAX_SIZE              \
    (LIBUSB_DT_BOS_SIZE +               \
     LIBUSB_BT_USB_2_0_EXTENSION_SIZE +     \
     LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE +  \
     LIBUSB_BT_CONTAINER_ID_SIZE)
 
#define LIBUSB_ENDPOINT_ADDRESS_MASK        0x0f    /* in bEndpointAddress */
#define LIBUSB_ENDPOINT_DIR_MASK        0x80
 
enum libusb_endpoint_direction {
    LIBUSB_ENDPOINT_OUT = 0x00,
 
    LIBUSB_ENDPOINT_IN = 0x80
};
 
#define LIBUSB_TRANSFER_TYPE_MASK       0x03    /* in bmAttributes */
 
enum libusb_endpoint_transfer_type {
    LIBUSB_ENDPOINT_TRANSFER_TYPE_CONTROL = 0x0,
 
    LIBUSB_ENDPOINT_TRANSFER_TYPE_ISOCHRONOUS = 0x1,
 
    LIBUSB_ENDPOINT_TRANSFER_TYPE_BULK = 0x2,
 
    LIBUSB_ENDPOINT_TRANSFER_TYPE_INTERRUPT = 0x3
};
 
enum libusb_standard_request {
    LIBUSB_REQUEST_GET_STATUS = 0x00,
 
    LIBUSB_REQUEST_CLEAR_FEATURE = 0x01,
 
    /* 0x02 is reserved */
 
    LIBUSB_REQUEST_SET_FEATURE = 0x03,
 
    /* 0x04 is reserved */
 
    LIBUSB_REQUEST_SET_ADDRESS = 0x05,
 
    LIBUSB_REQUEST_GET_DESCRIPTOR = 0x06,
 
    LIBUSB_REQUEST_SET_DESCRIPTOR = 0x07,
 
    LIBUSB_REQUEST_GET_CONFIGURATION = 0x08,
 
    LIBUSB_REQUEST_SET_CONFIGURATION = 0x09,
 
    LIBUSB_REQUEST_GET_INTERFACE = 0x0a,
 
    LIBUSB_REQUEST_SET_INTERFACE = 0x0b,
 
    LIBUSB_REQUEST_SYNCH_FRAME = 0x0c,
 
    LIBUSB_REQUEST_SET_SEL = 0x30,
 
    LIBUSB_SET_ISOCH_DELAY = 0x31
};
 
enum libusb_request_type {
    LIBUSB_REQUEST_TYPE_STANDARD = (0x00 << 5),
 
    LIBUSB_REQUEST_TYPE_CLASS = (0x01 << 5),
 
    LIBUSB_REQUEST_TYPE_VENDOR = (0x02 << 5),
 
    LIBUSB_REQUEST_TYPE_RESERVED = (0x03 << 5)
};
 
enum libusb_request_recipient {
    LIBUSB_RECIPIENT_DEVICE = 0x00,
 
    LIBUSB_RECIPIENT_INTERFACE = 0x01,
 
    LIBUSB_RECIPIENT_ENDPOINT = 0x02,
 
    LIBUSB_RECIPIENT_OTHER = 0x03
};
 
#define LIBUSB_ISO_SYNC_TYPE_MASK   0x0c
 
enum libusb_iso_sync_type {
    LIBUSB_ISO_SYNC_TYPE_NONE = 0x0,
 
    LIBUSB_ISO_SYNC_TYPE_ASYNC = 0x1,
 
    LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 0x2,
 
    LIBUSB_ISO_SYNC_TYPE_SYNC = 0x3
};
 
#define LIBUSB_ISO_USAGE_TYPE_MASK  0x30
 
enum libusb_iso_usage_type {
    LIBUSB_ISO_USAGE_TYPE_DATA = 0x0,
 
    LIBUSB_ISO_USAGE_TYPE_FEEDBACK = 0x1,
 
    LIBUSB_ISO_USAGE_TYPE_IMPLICIT = 0x2
};
 
enum libusb_supported_speed {
    LIBUSB_LOW_SPEED_OPERATION = (1 << 0),
 
    LIBUSB_FULL_SPEED_OPERATION = (1 << 1),
 
    LIBUSB_HIGH_SPEED_OPERATION = (1 << 2),
 
    LIBUSB_SUPER_SPEED_OPERATION = (1 << 3)
};
 
enum libusb_usb_2_0_extension_attributes {
    LIBUSB_BM_LPM_SUPPORT = (1 << 1)
};
 
enum libusb_ss_usb_device_capability_attributes {
    LIBUSB_BM_LTM_SUPPORT = (1 << 1)
};
 
enum libusb_bos_type {
    LIBUSB_BT_WIRELESS_USB_DEVICE_CAPABILITY = 0x01,
 
    LIBUSB_BT_USB_2_0_EXTENSION = 0x02,
 
    LIBUSB_BT_SS_USB_DEVICE_CAPABILITY = 0x03,
 
    LIBUSB_BT_CONTAINER_ID = 0x04,
 
    LIBUSB_BT_PLATFORM_DESCRIPTOR = 0x05
};
 
struct libusb_device_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint16_t bcdUSB;
 
    uint8_t  bDeviceClass;
 
    uint8_t  bDeviceSubClass;
 
    uint8_t  bDeviceProtocol;
 
    uint8_t  bMaxPacketSize0;
 
    uint16_t idVendor;
 
    uint16_t idProduct;
 
    uint16_t bcdDevice;
 
    uint8_t  iManufacturer;
 
    uint8_t  iProduct;
 
    uint8_t  iSerialNumber;
 
    uint8_t  bNumConfigurations;
};
 
struct libusb_endpoint_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bEndpointAddress;
 
    uint8_t  bmAttributes;
 
    uint16_t wMaxPacketSize;
 
    uint8_t  bInterval;
 
    uint8_t  bRefresh;
 
    uint8_t  bSynchAddress;
 
    const unsigned char *extra;
 
    int extra_length;
};
 
struct libusb_interface_association_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bFirstInterface;
 
    uint8_t  bInterfaceCount;
 
    uint8_t  bFunctionClass;
 
    uint8_t  bFunctionSubClass;
 
    uint8_t  bFunctionProtocol;
 
    uint8_t  iFunction;
};
 
struct libusb_interface_association_descriptor_array {
    const struct libusb_interface_association_descriptor *iad;
 
    int length;
};
 
struct libusb_interface_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bInterfaceNumber;
 
    uint8_t  bAlternateSetting;
 
    uint8_t  bNumEndpoints;
 
    uint8_t  bInterfaceClass;
 
    uint8_t  bInterfaceSubClass;
 
    uint8_t  bInterfaceProtocol;
 
    uint8_t  iInterface;
 
    const struct libusb_endpoint_descriptor *endpoint;
 
    const unsigned char *extra;
 
    int extra_length;
};
 
struct libusb_interface {
    const struct libusb_interface_descriptor *altsetting;
 
    int num_altsetting;
};
 
struct libusb_config_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint16_t wTotalLength;
 
    uint8_t  bNumInterfaces;
 
    uint8_t  bConfigurationValue;
 
    uint8_t  iConfiguration;
 
    uint8_t  bmAttributes;
 
    uint8_t  MaxPower;
 
    const struct libusb_interface *interface;
 
    const unsigned char *extra;
 
    int extra_length;
};
 
struct libusb_ss_endpoint_companion_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bMaxBurst;
 
    uint8_t  bmAttributes;
 
    uint16_t wBytesPerInterval;
};
 
struct libusb_bos_dev_capability_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bDevCapabilityType;
 
    uint8_t  dev_capability_data[LIBUSB_FLEXIBLE_ARRAY];
};
 
struct libusb_bos_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint16_t wTotalLength;
 
    uint8_t  bNumDeviceCaps;
 
    struct libusb_bos_dev_capability_descriptor *dev_capability[LIBUSB_FLEXIBLE_ARRAY];
};
 
struct libusb_usb_2_0_extension_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bDevCapabilityType;
 
    uint32_t bmAttributes;
};
 
struct libusb_ss_usb_device_capability_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bDevCapabilityType;
 
    uint8_t  bmAttributes;
 
    uint16_t wSpeedSupported;
 
    uint8_t  bFunctionalitySupport;
 
    uint8_t  bU1DevExitLat;
 
    uint16_t bU2DevExitLat;
};
 
struct libusb_container_id_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bDevCapabilityType;
 
    uint8_t  bReserved;
 
    uint8_t  ContainerID[16];
};
 
struct libusb_platform_descriptor {
    uint8_t  bLength;
 
    uint8_t  bDescriptorType;
 
    uint8_t  bDevCapabilityType;
 
    uint8_t  bReserved;
 
    uint8_t  PlatformCapabilityUUID[16];
 
    uint8_t  CapabilityData[LIBUSB_FLEXIBLE_ARRAY];
};
 
#if defined(_MSC_VER) || defined(__WATCOMC__)
#pragma pack(push, 1)
#endif
struct libusb_control_setup {
    uint8_t  bmRequestType;
 
    uint8_t  bRequest;
 
    uint16_t wValue;
 
    uint16_t wIndex;
 
    uint16_t wLength;
} LIBUSB_PACKED;
#if defined(_MSC_VER) || defined(__WATCOMC__)
#pragma pack(pop)
#endif
 
#define LIBUSB_CONTROL_SETUP_SIZE (sizeof(struct libusb_control_setup))
 
/* libusb */
 
struct libusb_context;
struct libusb_device;
struct libusb_device_handle;
 
struct libusb_version {
    const uint16_t major;
 
    const uint16_t minor;
 
    const uint16_t micro;
 
    const uint16_t nano;
 
    const char *rc;
 
    const char *describe;
};
 
typedef struct libusb_context libusb_context;
 
typedef struct libusb_device libusb_device;
 
 
typedef struct libusb_device_handle libusb_device_handle;
 
enum libusb_speed {
    LIBUSB_SPEED_UNKNOWN = 0,
 
    LIBUSB_SPEED_LOW = 1,
 
    LIBUSB_SPEED_FULL = 2,
 
    LIBUSB_SPEED_HIGH = 3,
 
    LIBUSB_SPEED_SUPER = 4,
 
    LIBUSB_SPEED_SUPER_PLUS = 5
};
 
enum libusb_error {
    LIBUSB_SUCCESS = 0,
 
    LIBUSB_ERROR_IO = -1,
 
    LIBUSB_ERROR_INVALID_PARAM = -2,
 
    LIBUSB_ERROR_ACCESS = -3,
 
    LIBUSB_ERROR_NO_DEVICE = -4,
 
    LIBUSB_ERROR_NOT_FOUND = -5,
 
    LIBUSB_ERROR_BUSY = -6,
 
    LIBUSB_ERROR_TIMEOUT = -7,
 
    LIBUSB_ERROR_OVERFLOW = -8,
 
    LIBUSB_ERROR_PIPE = -9,
 
    LIBUSB_ERROR_INTERRUPTED = -10,
 
    LIBUSB_ERROR_NO_MEM = -11,
 
    LIBUSB_ERROR_NOT_SUPPORTED = -12,
 
    /* NB: Remember to update LIBUSB_ERROR_COUNT below as well as the
       message strings in strerror.c when adding new error codes here. */
 
    LIBUSB_ERROR_OTHER = -99
};
 
/* Total number of error codes in enum libusb_error */
#define LIBUSB_ERROR_COUNT 14
 
enum libusb_transfer_type {
    LIBUSB_TRANSFER_TYPE_CONTROL = 0U,
 
    LIBUSB_TRANSFER_TYPE_ISOCHRONOUS = 1U,
 
    LIBUSB_TRANSFER_TYPE_BULK = 2U,
 
    LIBUSB_TRANSFER_TYPE_INTERRUPT = 3U,
 
    LIBUSB_TRANSFER_TYPE_BULK_STREAM = 4U
};
 
enum libusb_transfer_status {
    LIBUSB_TRANSFER_COMPLETED,
 
    LIBUSB_TRANSFER_ERROR,
 
    LIBUSB_TRANSFER_TIMED_OUT,
 
    LIBUSB_TRANSFER_CANCELLED,
 
    LIBUSB_TRANSFER_STALL,
 
    LIBUSB_TRANSFER_NO_DEVICE,
 
    LIBUSB_TRANSFER_OVERFLOW
 
    /* NB! Remember to update libusb_error_name()
       when adding new status codes here. */
};
 
enum libusb_transfer_flags {
    LIBUSB_TRANSFER_SHORT_NOT_OK = (1U << 0),
 
    LIBUSB_TRANSFER_FREE_BUFFER = (1U << 1),
 
    LIBUSB_TRANSFER_FREE_TRANSFER = (1U << 2),
 
    LIBUSB_TRANSFER_ADD_ZERO_PACKET = (1U << 3)
};
 
struct libusb_iso_packet_descriptor {
    unsigned int length;
 
    unsigned int actual_length;
 
    enum libusb_transfer_status status;
};
 
struct libusb_transfer;
 
typedef void (LIBUSB_CALL *libusb_transfer_cb_fn)(struct libusb_transfer *transfer);
 
struct libusb_transfer {
    libusb_device_handle *dev_handle;
 
    uint8_t flags;
 
    unsigned char endpoint;
 
    unsigned char type;
 
    unsigned int timeout;
 
    enum libusb_transfer_status status;
 
    int length;
 
    int actual_length;
 
    libusb_transfer_cb_fn callback;
 
    void *user_data;
 
    unsigned char *buffer;
 
    int num_iso_packets;
 
    struct libusb_iso_packet_descriptor iso_packet_desc[LIBUSB_FLEXIBLE_ARRAY];
};
 
enum libusb_capability {
    LIBUSB_CAP_HAS_CAPABILITY = 0x0000U,
 
    LIBUSB_CAP_HAS_HOTPLUG = 0x0001U,
 
    LIBUSB_CAP_HAS_HID_ACCESS = 0x0100U,
 
    LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER = 0x0101U
};
 
enum libusb_log_level {
    LIBUSB_LOG_LEVEL_NONE = 0,
 
    LIBUSB_LOG_LEVEL_ERROR = 1,
 
    LIBUSB_LOG_LEVEL_WARNING = 2,
 
    LIBUSB_LOG_LEVEL_INFO = 3,
 
    LIBUSB_LOG_LEVEL_DEBUG = 4
};
 
enum libusb_log_cb_mode {
    LIBUSB_LOG_CB_GLOBAL = (1 << 0),
 
    LIBUSB_LOG_CB_CONTEXT = (1 << 1)
};
 
enum libusb_option {
    LIBUSB_OPTION_LOG_LEVEL = 0,
 
    LIBUSB_OPTION_USE_USBDK = 1,
 
    LIBUSB_OPTION_NO_DEVICE_DISCOVERY = 2,
 
#define LIBUSB_OPTION_WEAK_AUTHORITY LIBUSB_OPTION_NO_DEVICE_DISCOVERY
 
    LIBUSB_OPTION_LOG_CB = 3,
 
    LIBUSB_OPTION_MAX = 4
};
 
typedef void (LIBUSB_CALL *libusb_log_cb)(libusb_context *ctx,
    enum libusb_log_level level, const char *str);
 
struct libusb_init_option {
  enum libusb_option option;
  union {
    int ival;
    libusb_log_cb log_cbval;
  } value;
};
 
int LIBUSB_CALL libusb_init(libusb_context **ctx);
int LIBUSB_CALL libusb_init_context(libusb_context **ctx, const struct libusb_init_option options[], int num_options);
void LIBUSB_CALL libusb_exit(libusb_context *ctx);
void LIBUSB_CALL libusb_set_debug(libusb_context *ctx, int level);
/* may be deprecated in the future in favor of lubusb_init_context()+libusb_set_option() */
void LIBUSB_CALL libusb_set_log_cb(libusb_context *ctx, libusb_log_cb cb, int mode);
const struct libusb_version * LIBUSB_CALL libusb_get_version(void);
int LIBUSB_CALL libusb_has_capability(uint32_t capability);
const char * LIBUSB_CALL libusb_error_name(int errcode);
int LIBUSB_CALL libusb_setlocale(const char *locale);
const char * LIBUSB_CALL libusb_strerror(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);
int LIBUSB_CALL libusb_get_ss_endpoint_companion_descriptor(
    libusb_context *ctx,
    const struct libusb_endpoint_descriptor *endpoint,
    struct libusb_ss_endpoint_companion_descriptor **ep_comp);
void LIBUSB_CALL libusb_free_ss_endpoint_companion_descriptor(
    struct libusb_ss_endpoint_companion_descriptor *ep_comp);
int LIBUSB_CALL libusb_get_bos_descriptor(libusb_device_handle *dev_handle,
    struct libusb_bos_descriptor **bos);
void LIBUSB_CALL libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos);
int LIBUSB_CALL libusb_get_usb_2_0_extension_descriptor(
    libusb_context *ctx,
    struct libusb_bos_dev_capability_descriptor *dev_cap,
    struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension);
void LIBUSB_CALL libusb_free_usb_2_0_extension_descriptor(
    struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension);
int LIBUSB_CALL libusb_get_ss_usb_device_capability_descriptor(
    libusb_context *ctx,
    struct libusb_bos_dev_capability_descriptor *dev_cap,
    struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap);
void LIBUSB_CALL libusb_free_ss_usb_device_capability_descriptor(
    struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap);
int LIBUSB_CALL libusb_get_container_id_descriptor(libusb_context *ctx,
    struct libusb_bos_dev_capability_descriptor *dev_cap,
    struct libusb_container_id_descriptor **container_id);
void LIBUSB_CALL libusb_free_container_id_descriptor(
    struct libusb_container_id_descriptor *container_id);
int LIBUSB_CALL libusb_get_platform_descriptor(libusb_context *ctx,
    struct libusb_bos_dev_capability_descriptor *dev_cap,
    struct libusb_platform_descriptor **platform_descriptor);
void LIBUSB_CALL libusb_free_platform_descriptor(
    struct libusb_platform_descriptor *platform_descriptor);
uint8_t LIBUSB_CALL libusb_get_bus_number(libusb_device *dev);
uint8_t LIBUSB_CALL libusb_get_port_number(libusb_device *dev);
int LIBUSB_CALL libusb_get_port_numbers(libusb_device *dev, uint8_t *port_numbers, int port_numbers_len);
LIBUSB_DEPRECATED_FOR(libusb_get_port_numbers)
int LIBUSB_CALL libusb_get_port_path(libusb_context *ctx, libusb_device *dev, uint8_t *path, uint8_t path_length);
libusb_device * LIBUSB_CALL libusb_get_parent(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_get_max_alt_packet_size(libusb_device *dev,
    int interface_number, int alternate_setting, unsigned char endpoint);
 
int LIBUSB_CALL libusb_get_interface_association_descriptors(libusb_device *dev,
    uint8_t config_index, struct libusb_interface_association_descriptor_array **iad_array);
int LIBUSB_CALL libusb_get_active_interface_association_descriptors(libusb_device *dev,
    struct libusb_interface_association_descriptor_array **iad_array);
void LIBUSB_CALL libusb_free_interface_association_descriptors(
    struct libusb_interface_association_descriptor_array *iad_array);
 
int LIBUSB_CALL libusb_wrap_sys_device(libusb_context *ctx, intptr_t sys_dev, libusb_device_handle **dev_handle);
int LIBUSB_CALL libusb_open(libusb_device *dev, libusb_device_handle **dev_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_handle,
    int configuration);
int LIBUSB_CALL libusb_claim_interface(libusb_device_handle *dev_handle,
    int interface_number);
int LIBUSB_CALL libusb_release_interface(libusb_device_handle *dev_handle,
    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_handle,
    int interface_number, int alternate_setting);
int LIBUSB_CALL libusb_clear_halt(libusb_device_handle *dev_handle,
    unsigned char endpoint);
int LIBUSB_CALL libusb_reset_device(libusb_device_handle *dev_handle);
 
int LIBUSB_CALL libusb_alloc_streams(libusb_device_handle *dev_handle,
    uint32_t num_streams, unsigned char *endpoints, int num_endpoints);
int LIBUSB_CALL libusb_free_streams(libusb_device_handle *dev_handle,
    unsigned char *endpoints, int num_endpoints);
 
unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle,
    size_t length);
int LIBUSB_CALL libusb_dev_mem_free(libusb_device_handle *dev_handle,
    unsigned char *buffer, size_t length);
 
int LIBUSB_CALL libusb_kernel_driver_active(libusb_device_handle *dev_handle,
    int interface_number);
int LIBUSB_CALL libusb_detach_kernel_driver(libusb_device_handle *dev_handle,
    int interface_number);
int LIBUSB_CALL libusb_attach_kernel_driver(libusb_device_handle *dev_handle,
    int interface_number);
int LIBUSB_CALL libusb_set_auto_detach_kernel_driver(
    libusb_device_handle *dev_handle, int enable);
 
/* async I/O */
 
static inline unsigned char *libusb_control_transfer_get_data(
    struct libusb_transfer *transfer)
{
    return transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
}
 
static inline struct libusb_control_setup *libusb_control_transfer_get_setup(
    struct libusb_transfer *transfer)
{
    return (struct libusb_control_setup *)(void *)transfer->buffer;
}
 
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 *)(void *)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);
void LIBUSB_CALL libusb_transfer_set_stream_id(
    struct libusb_transfer *transfer, uint32_t stream_id);
uint32_t LIBUSB_CALL libusb_transfer_get_stream_id(
    struct libusb_transfer *transfer);
 
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 *)(void *)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 = (int) (LIBUSB_CONTROL_SETUP_SIZE
            + libusb_le16_to_cpu(setup->wLength));
    transfer->user_data = user_data;
    transfer->callback = callback;
}
 
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;
}
 
static inline void libusb_fill_bulk_stream_transfer(
    struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
    unsigned char endpoint, uint32_t stream_id,
    unsigned char *buffer, int length, libusb_transfer_cb_fn callback,
    void *user_data, unsigned int timeout)
{
    libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer,
                  length, callback, user_data, timeout);
    transfer->type = LIBUSB_TRANSFER_TYPE_BULK_STREAM;
    libusb_transfer_set_stream_id(transfer, stream_id);
}
 
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;
}
 
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;
}
 
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;
}
 
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 = (int) 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;
}
 
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 = (int) packet;
 
    if (_packet >= transfer->num_iso_packets)
        return NULL;
 
    return transfer->buffer + ((int) 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);
 
static inline int libusb_get_descriptor(libusb_device_handle *dev_handle,
    uint8_t desc_type, uint8_t desc_index, unsigned char *data, int length)
{
    return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
        LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t) ((desc_type << 8) | desc_index),
        0, data, (uint16_t) length, 1000);
}
 
static inline int libusb_get_string_descriptor(libusb_device_handle *dev_handle,
    uint8_t desc_index, uint16_t langid, unsigned char *data, int length)
{
    return libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN,
        LIBUSB_REQUEST_GET_DESCRIPTOR, (uint16_t)((LIBUSB_DT_STRING << 8) | desc_index),
        langid, data, (uint16_t) length, 1000);
}
 
int LIBUSB_CALL libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle,
    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_interrupt_event_handler(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);
 
struct libusb_pollfd {
    int fd;
 
    short events;
};
 
typedef void (LIBUSB_CALL *libusb_pollfd_added_cb)(int fd, short events,
    void *user_data);
 
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_free_pollfds(const struct libusb_pollfd **pollfds);
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);
 
typedef int libusb_hotplug_callback_handle;
 
typedef enum {
    LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED = (1 << 0),
 
    LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT = (1 << 1)
} libusb_hotplug_event;
 
typedef enum {
    LIBUSB_HOTPLUG_ENUMERATE = (1 << 0)
} libusb_hotplug_flag;
 
#define LIBUSB_HOTPLUG_NO_FLAGS 0
 
#define LIBUSB_HOTPLUG_MATCH_ANY -1
 
typedef int (LIBUSB_CALL *libusb_hotplug_callback_fn)(libusb_context *ctx,
    libusb_device *device, libusb_hotplug_event event, void *user_data);
 
int LIBUSB_CALL libusb_hotplug_register_callback(libusb_context *ctx,
    int events, int flags,
    int vendor_id, int product_id, int dev_class,
    libusb_hotplug_callback_fn cb_fn, void *user_data,
    libusb_hotplug_callback_handle *callback_handle);
 
void LIBUSB_CALL libusb_hotplug_deregister_callback(libusb_context *ctx,
    libusb_hotplug_callback_handle callback_handle);
 
void * LIBUSB_CALL libusb_hotplug_get_user_data(libusb_context *ctx,
    libusb_hotplug_callback_handle callback_handle);
 
int LIBUSB_CALLV libusb_set_option(libusb_context *ctx, enum libusb_option option, ...);
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#if defined(__cplusplus)
}
#endif
 
#endif