--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDL3/SDL_hidapi.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,571 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/* WIKI CATEGORY: HIDAPI */
+
+/**
+ * # CategoryHIDAPI
+ *
+ * Header file for SDL HIDAPI functions.
+ *
+ * This is an adaptation of the original HIDAPI interface by Alan Ott, and
+ * includes source code licensed under the following license:
+ *
+ * ```
+ * HIDAPI - Multi-Platform library for
+ * communication with HID devices.
+ *
+ * Copyright 2009, Alan Ott, Signal 11 Software.
+ * All Rights Reserved.
+ *
+ * This software may be used by anyone for any reason so
+ * long as the copyright notice in the source files
+ * remains intact.
+ * ```
+ *
+ * (Note that this license is the same as item three of SDL's zlib license, so
+ * it adds no new requirements on the user.)
+ *
+ * If you would like a version of SDL without this code, you can build SDL
+ * with SDL_HIDAPI_DISABLED defined to 1. You might want to do this for
+ * example on iOS or tvOS to avoid a dependency on the CoreBluetooth
+ * framework.
+ */
+
+#ifndef SDL_hidapi_h_
+#define SDL_hidapi_h_
+
+#include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_properties.h>
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * An opaque handle representing an open HID device.
+ *
+ * \since This struct is available since SDL 3.2.0.
+ */
+typedef struct SDL_hid_device SDL_hid_device;
+
+/**
+ * HID underlying bus types.
+ *
+ * \since This enum is available since SDL 3.2.0.
+ */
+typedef enum SDL_hid_bus_type {
+    /** Unknown bus type */
+    SDL_HID_API_BUS_UNKNOWN = 0x00,
+
+    /** USB bus
+       Specifications:
+       https://usb.org/hid */
+    SDL_HID_API_BUS_USB = 0x01,
+
+    /** Bluetooth or Bluetooth LE bus
+       Specifications:
+       https://www.bluetooth.com/specifications/specs/human-interface-device-profile-1-1-1/
+       https://www.bluetooth.com/specifications/specs/hid-service-1-0/
+       https://www.bluetooth.com/specifications/specs/hid-over-gatt-profile-1-0/ */
+    SDL_HID_API_BUS_BLUETOOTH = 0x02,
+
+    /** I2C bus
+       Specifications:
+       https://docs.microsoft.com/previous-versions/windows/hardware/design/dn642101(v=vs.85) */
+    SDL_HID_API_BUS_I2C = 0x03,
+
+    /** SPI bus
+       Specifications:
+       https://www.microsoft.com/download/details.aspx?id=103325 */
+    SDL_HID_API_BUS_SPI = 0x04
+
+} SDL_hid_bus_type;
+
+/** hidapi info structure */
+
+/**
+ * Information about a connected HID device
+ *
+ * \since This struct is available since SDL 3.2.0.
+ */
+typedef struct SDL_hid_device_info
+{
+    /** Platform-specific device path */
+    char *path;
+    /** Device Vendor ID */
+    unsigned short vendor_id;
+    /** Device Product ID */
+    unsigned short product_id;
+    /** Serial Number */
+    wchar_t *serial_number;
+    /** Device Release Number in binary-coded decimal,
+        also known as Device Version Number */
+    unsigned short release_number;
+    /** Manufacturer String */
+    wchar_t *manufacturer_string;
+    /** Product string */
+    wchar_t *product_string;
+    /** Usage Page for this Device/Interface
+        (Windows/Mac/hidraw only) */
+    unsigned short usage_page;
+    /** Usage for this Device/Interface
+        (Windows/Mac/hidraw only) */
+    unsigned short usage;
+    /** The USB interface which this logical device
+        represents.
+
+        Valid only if the device is a USB HID device.
+        Set to -1 in all other cases.
+    */
+    int interface_number;
+
+    /** Additional information about the USB interface.
+        Valid on libusb and Android implementations. */
+    int interface_class;
+    int interface_subclass;
+    int interface_protocol;
+
+    /** Underlying bus type */
+    SDL_hid_bus_type bus_type;
+
+    /** Pointer to the next device */
+    struct SDL_hid_device_info *next;
+
+} SDL_hid_device_info;
+
+
+/**
+ * Initialize the HIDAPI library.
+ *
+ * This function initializes the HIDAPI library. Calling it is not strictly
+ * necessary, as it will be called automatically by SDL_hid_enumerate() and
+ * any of the SDL_hid_open_*() functions if it is needed. This function should
+ * be called at the beginning of execution however, if there is a chance of
+ * HIDAPI handles being opened by different threads simultaneously.
+ *
+ * Each call to this function should have a matching call to SDL_hid_exit()
+ *
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_hid_exit
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_init(void);
+
+/**
+ * Finalize the HIDAPI library.
+ *
+ * This function frees all of the static data associated with HIDAPI. It
+ * should be called at the end of execution to avoid memory leaks.
+ *
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_hid_init
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_exit(void);
+
+/**
+ * Check to see if devices may have been added or removed.
+ *
+ * Enumerating the HID devices is an expensive operation, so you can call this
+ * to see if there have been any system device changes since the last call to
+ * this function. A change in the counter returned doesn't necessarily mean
+ * that anything has changed, but you can call SDL_hid_enumerate() to get an
+ * updated device list.
+ *
+ * Calling this function for the first time may cause a thread or other system
+ * resource to be allocated to track device change notifications.
+ *
+ * \returns a change counter that is incremented with each potential device
+ *          change, or 0 if device change detection isn't available.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_hid_enumerate
+ */
+extern SDL_DECLSPEC Uint32 SDLCALL SDL_hid_device_change_count(void);
+
+/**
+ * Enumerate the HID Devices.
+ *
+ * This function returns a linked list of all the HID devices attached to the
+ * system which match vendor_id and product_id. If `vendor_id` is set to 0
+ * then any vendor matches. If `product_id` is set to 0 then any product
+ * matches. If `vendor_id` and `product_id` are both set to 0, then all HID
+ * devices will be returned.
+ *
+ * By default SDL will only enumerate controllers, to reduce risk of hanging
+ * or crashing on bad drivers, but SDL_HINT_HIDAPI_ENUMERATE_ONLY_CONTROLLERS
+ * can be set to "0" to enumerate all HID devices.
+ *
+ * \param vendor_id the Vendor ID (VID) of the types of device to open, or 0
+ *                  to match any vendor.
+ * \param product_id the Product ID (PID) of the types of device to open, or 0
+ *                   to match any product.
+ * \returns a pointer to a linked list of type SDL_hid_device_info, containing
+ *          information about the HID devices attached to the system, or NULL
+ *          in the case of failure. Free this linked list by calling
+ *          SDL_hid_free_enumeration().
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_hid_device_change_count
+ */
+extern SDL_DECLSPEC SDL_hid_device_info * SDLCALL SDL_hid_enumerate(unsigned short vendor_id, unsigned short product_id);
+
+/**
+ * Free an enumeration linked list.
+ *
+ * This function frees a linked list created by SDL_hid_enumerate().
+ *
+ * \param devs pointer to a list of struct_device returned from
+ *             SDL_hid_enumerate().
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC void SDLCALL SDL_hid_free_enumeration(SDL_hid_device_info *devs);
+
+/**
+ * Open a HID device using a Vendor ID (VID), Product ID (PID) and optionally
+ * a serial number.
+ *
+ * If `serial_number` is NULL, the first device with the specified VID and PID
+ * is opened.
+ *
+ * \param vendor_id the Vendor ID (VID) of the device to open.
+ * \param product_id the Product ID (PID) of the device to open.
+ * \param serial_number the Serial Number of the device to open (Optionally
+ *                      NULL).
+ * \returns a pointer to a SDL_hid_device object on success or NULL on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_hid_device * SDLCALL SDL_hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number);
+
+/**
+ * Open a HID device by its path name.
+ *
+ * The path name be determined by calling SDL_hid_enumerate(), or a
+ * platform-specific path name can be used (eg: /dev/hidraw0 on Linux).
+ *
+ * \param path the path name of the device to open.
+ * \returns a pointer to a SDL_hid_device object on success or NULL on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_hid_device * SDLCALL SDL_hid_open_path(const char *path);
+
+/**
+ * Get the properties associated with an SDL_hid_device.
+ *
+ * The following read-only properties are provided by SDL:
+ *
+ * - `SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER`: the libusb_device_handle
+ *   associated with the device, if it was opened using libusb.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \returns a valid property ID on success or 0 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.4.0.
+ */
+extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_hid_get_properties(SDL_hid_device *dev);
+
+#define SDL_PROP_HIDAPI_LIBUSB_DEVICE_HANDLE_POINTER   "SDL.hidapi.libusb.device.handle"
+
+/**
+ * Write an Output report to a HID device.
+ *
+ * The first byte of `data` must contain the Report ID. For devices which only
+ * support a single report, this must be set to 0x0. The remaining bytes
+ * contain the report data. Since the Report ID is mandatory, calls to
+ * SDL_hid_write() will always contain one more byte than the report contains.
+ * For example, if a hid report is 16 bytes long, 17 bytes must be passed to
+ * SDL_hid_write(), the Report ID (or 0x0, for devices with a single report),
+ * followed by the report data (16 bytes). In this example, the length passed
+ * in would be 17.
+ *
+ * SDL_hid_write() will send the data on the first OUT endpoint, if one
+ * exists. If it does not, it will send the data through the Control Endpoint
+ * (Endpoint 0).
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data the data to send, including the report number as the first
+ *             byte.
+ * \param length the length in bytes of the data to send.
+ * \returns the actual number of bytes written and -1 on on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_write(SDL_hid_device *dev, const unsigned char *data, size_t length);
+
+/**
+ * Read an Input report from a HID device with timeout.
+ *
+ * Input reports are returned to the host through the INTERRUPT IN endpoint.
+ * The first byte will contain the Report number if the device uses numbered
+ * reports.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data a buffer to put the read data into.
+ * \param length the number of bytes to read. For devices with multiple
+ *               reports, make sure to read an extra byte for the report
+ *               number.
+ * \param milliseconds timeout in milliseconds or -1 for blocking wait.
+ * \returns the actual number of bytes read and -1 on on failure; call
+ *          SDL_GetError() for more information. If no packet was available to
+ *          be read within the timeout period, this function returns 0.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_read_timeout(SDL_hid_device *dev, unsigned char *data, size_t length, int milliseconds);
+
+/**
+ * Read an Input report from a HID device.
+ *
+ * Input reports are returned to the host through the INTERRUPT IN endpoint.
+ * The first byte will contain the Report number if the device uses numbered
+ * reports.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data a buffer to put the read data into.
+ * \param length the number of bytes to read. For devices with multiple
+ *               reports, make sure to read an extra byte for the report
+ *               number.
+ * \returns the actual number of bytes read and -1 on failure; call
+ *          SDL_GetError() for more information. If no packet was available to
+ *          be read and the handle is in non-blocking mode, this function
+ *          returns 0.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_read(SDL_hid_device *dev, unsigned char *data, size_t length);
+
+/**
+ * Set the device handle to be non-blocking.
+ *
+ * In non-blocking mode calls to SDL_hid_read() will return immediately with a
+ * value of 0 if there is no data to be read. In blocking mode, SDL_hid_read()
+ * will wait (block) until there is data to read before returning.
+ *
+ * Nonblocking can be turned on and off at any time.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param nonblock enable or not the nonblocking reads - 1 to enable
+ *                 nonblocking - 0 to disable nonblocking.
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_set_nonblocking(SDL_hid_device *dev, int nonblock);
+
+/**
+ * Send a Feature report to the device.
+ *
+ * Feature reports are sent over the Control endpoint as a Set_Report
+ * transfer. The first byte of `data` must contain the Report ID. For devices
+ * which only support a single report, this must be set to 0x0. The remaining
+ * bytes contain the report data. Since the Report ID is mandatory, calls to
+ * SDL_hid_send_feature_report() will always contain one more byte than the
+ * report contains. For example, if a hid report is 16 bytes long, 17 bytes
+ * must be passed to SDL_hid_send_feature_report(): the Report ID (or 0x0, for
+ * devices which do not use numbered reports), followed by the report data (16
+ * bytes). In this example, the length passed in would be 17.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data the data to send, including the report number as the first
+ *             byte.
+ * \param length the length in bytes of the data to send, including the report
+ *               number.
+ * \returns the actual number of bytes written and -1 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_send_feature_report(SDL_hid_device *dev, const unsigned char *data, size_t length);
+
+/**
+ * Get a feature report from a HID device.
+ *
+ * Set the first byte of `data` to the Report ID of the report to be read.
+ * Make sure to allow space for this extra byte in `data`. Upon return, the
+ * first byte will still contain the Report ID, and the report data will start
+ * in data[1].
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data a buffer to put the read data into, including the Report ID.
+ *             Set the first byte of `data` to the Report ID of the report to
+ *             be read, or set it to zero if your device does not use numbered
+ *             reports.
+ * \param length the number of bytes to read, including an extra byte for the
+ *               report ID. The buffer can be longer than the actual report.
+ * \returns the number of bytes read plus one for the report ID (which is
+ *          still in the first byte), or -1 on on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_feature_report(SDL_hid_device *dev, unsigned char *data, size_t length);
+
+/**
+ * Get an input report from a HID device.
+ *
+ * Set the first byte of `data` to the Report ID of the report to be read.
+ * Make sure to allow space for this extra byte in `data`. Upon return, the
+ * first byte will still contain the Report ID, and the report data will start
+ * in data[1].
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param data a buffer to put the read data into, including the Report ID.
+ *             Set the first byte of `data` to the Report ID of the report to
+ *             be read, or set it to zero if your device does not use numbered
+ *             reports.
+ * \param length the number of bytes to read, including an extra byte for the
+ *               report ID. The buffer can be longer than the actual report.
+ * \returns the number of bytes read plus one for the report ID (which is
+ *          still in the first byte), or -1 on on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_input_report(SDL_hid_device *dev, unsigned char *data, size_t length);
+
+/**
+ * Close a HID device.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_close(SDL_hid_device *dev);
+
+/**
+ * Get The Manufacturer String from a HID device.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param string a wide string buffer to put the data into.
+ * \param maxlen the length of the buffer in multiples of wchar_t.
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_manufacturer_string(SDL_hid_device *dev, wchar_t *string, size_t maxlen);
+
+/**
+ * Get The Product String from a HID device.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param string a wide string buffer to put the data into.
+ * \param maxlen the length of the buffer in multiples of wchar_t.
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_product_string(SDL_hid_device *dev, wchar_t *string, size_t maxlen);
+
+/**
+ * Get The Serial Number String from a HID device.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param string a wide string buffer to put the data into.
+ * \param maxlen the length of the buffer in multiples of wchar_t.
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_serial_number_string(SDL_hid_device *dev, wchar_t *string, size_t maxlen);
+
+/**
+ * Get a string from a HID device, based on its string index.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param string_index the index of the string to get.
+ * \param string a wide string buffer to put the data into.
+ * \param maxlen the length of the buffer in multiples of wchar_t.
+ * \returns 0 on success or a negative error code on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_indexed_string(SDL_hid_device *dev, int string_index, wchar_t *string, size_t maxlen);
+
+/**
+ * Get the device info from a HID device.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \returns a pointer to the SDL_hid_device_info for this hid_device or NULL
+ *          on failure; call SDL_GetError() for more information. This struct
+ *          is valid until the device is closed with SDL_hid_close().
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_hid_device_info * SDLCALL SDL_hid_get_device_info(SDL_hid_device *dev);
+
+/**
+ * Get a report descriptor from a HID device.
+ *
+ * User has to provide a preallocated buffer where descriptor will be copied
+ * to. The recommended size for a preallocated buffer is 4096 bytes.
+ *
+ * \param dev a device handle returned from SDL_hid_open().
+ * \param buf the buffer to copy descriptor into.
+ * \param buf_size the size of the buffer in bytes.
+ * \returns the number of bytes actually copied or -1 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC int SDLCALL SDL_hid_get_report_descriptor(SDL_hid_device *dev, unsigned char *buf, size_t buf_size);
+
+/**
+ * Start or stop a BLE scan on iOS and tvOS to pair Steam Controllers.
+ *
+ * \param active true to start the scan, false to stop the scan.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC void SDLCALL SDL_hid_ble_scan(bool active);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_hidapi_h_ */