Added SDL_HINT_HIDAPI_IGNORE_DEVICES to specify devices that should be ignored in SDL_hid_enumerate()

Author: slouken

src/hidapi/libusb/hid.c

@@ -19,6 +19,7 @@
  code repository located at:
         https://github.com/libusb/hidapi .
 ********************************************************/
+#include "SDL_internal.h"
 
 #define _GNU_SOURCE /* needed for wcsdup() before glibc 2.10 */
 
@@ -976,6 +977,7 @@ struct hid_device_info  HID_API_EXPORT *hid_enumerate(unsigned short vendor_id,
 
 	struct hid_device_info *root = NULL; /* return object */
 	struct hid_device_info *cur_dev = NULL;
+	const char *hint = SDL_GetHint(SDL_HINT_HIDAPI_IGNORE_DEVICES);
 
 	if(hid_init() < 0)
 		return NULL;
@@ -1000,6 +1002,16 @@ struct hid_device_info  HID_API_EXPORT *hid_enumerate(unsigned short vendor_id,
 			continue;
 		}
 
+		/* See if there are any devices we should skip in enumeration */
+		if (hint) {
+			char vendor_match[16], product_match[16];
+			SDL_snprintf(vendor_match, sizeof(vendor_match), "0x%.4x/0x0000", dev_vid);
+			SDL_snprintf(product_match, sizeof(product_match), "0x%.4x/0x%.4x", dev_vid, dev_pid);
+			if (SDL_strcasestr(hint, vendor_match) || SDL_strcasestr(hint, product_match)) {
+				continue;
+			}
+		}
+
 		res = libusb_get_active_config_descriptor(dev, &conf_desc);
 		if (res < 0)
 			libusb_get_config_descriptor(dev, 0, &conf_desc);