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

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This commit is contained in:
Sam Lantinga
2022-11-05 16:44:52 -07:00
parent 297ecb706d
commit 15a9890919
7 changed files with 85 additions and 1 deletions
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13
src/hidapi/linux/hid.c
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@@ -22,6 +22,8 @@
********************************************************/
#include "../../SDL_internal.h"
#include "SDL_hints.h"
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* needed for wcsdup() before glibc 2.10 */
#endif
@@ -481,6 +483,7 @@ 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;
struct hid_device_info *prev_dev = NULL; /* previous device */
const char *hint = SDL_GetHint(SDL_HINT_HIDAPI_IGNORE_DEVICES);
hid_init();
@@ -552,6 +555,16 @@ struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id,
goto next;
}
/* 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;
}
}
/* Check the VID/PID against the arguments */
if ((vendor_id == 0x0 || vendor_id == dev_vid) &&
(product_id == 0x0 || product_id == dev_pid)) {