From 919cd56b20c59249bdde3bb005aeeb8f6550f3e3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 20 Dec 2023 19:05:20 -0800
Subject: [PATCH] Use the original manufacturer and product strings for the
 joystick CRC

This allows the most information possible for the CRC string, which is used to differentiate controllers with the same VID/PID.

Fixes https://github.com/libsdl-org/SDL/issues/8724

(cherry picked from commit 1f1ee6f77c492e17a9691c367110c11529fab3fb)
---
 src/joystick/SDL_joystick.c                   | 17 +++++++++------
 src/joystick/SDL_joystick_c.h                 |  2 +-
 src/joystick/android/SDL_sysjoystick.c        |  2 +-
 src/joystick/bsd/SDL_bsdjoystick.c            |  2 +-
 src/joystick/darwin/SDL_iokitjoystick.c       |  2 +-
 src/joystick/hidapi/SDL_hidapijoystick.c      | 21 ++++++++-----------
 src/joystick/hidapi/SDL_hidapijoystick_c.h    |  2 ++
 src/joystick/iphoneos/SDL_mfijoystick.m       |  2 +-
 src/joystick/linux/SDL_sysjoystick.c          |  2 +-
 src/joystick/virtual/SDL_virtualjoystick.c    |  2 +-
 src/joystick/windows/SDL_dinputjoystick.c     |  4 ++--
 src/joystick/windows/SDL_rawinputjoystick.c   |  3 +--
 .../windows/SDL_windows_gaming_input.c        |  2 +-
 src/joystick/windows/SDL_xinputjoystick.c     |  6 ++++--
 14 files changed, 37 insertions(+), 32 deletions(-)

diff --git a/src/joystick/SDL_joystick.c b/src/joystick/SDL_joystick.c
index 92427a5e8..ec335e4cf 100644
--- a/src/joystick/SDL_joystick.c
+++ b/src/joystick/SDL_joystick.c
@@ -2449,21 +2449,26 @@ char *SDL_CreateJoystickName(Uint16 vendor, Uint16 product, const char *vendor_n
     return name;
 }
 
-SDL_JoystickGUID SDL_CreateJoystickGUID(Uint16 bus, Uint16 vendor, Uint16 product, Uint16 version, const char *name, Uint8 driver_signature, Uint8 driver_data)
+SDL_JoystickGUID SDL_CreateJoystickGUID(Uint16 bus, Uint16 vendor, Uint16 product, Uint16 version, const char *vendor_name, const char *product_name, Uint8 driver_signature, Uint8 driver_data)
 {
     SDL_JoystickGUID guid;
     Uint16 *guid16 = (Uint16 *)guid.data;
+    Uint16 crc = 0;
 
     SDL_zero(guid);
 
-    if (!name) {
-        name = "";
+    if (vendor_name && *vendor_name && product_name && *product_name) {
+        SDL_crc16(crc, vendor_name, SDL_strlen(vendor_name));
+        SDL_crc16(crc, " ", 1);
+        SDL_crc16(crc, product_name, SDL_strlen(product_name));
+    } else if (product_name) {
+        SDL_crc16(crc, product_name, SDL_strlen(product_name));
     }
 
     /* We only need 16 bits for each of these; space them out to fill 128. */
     /* Byteswap so devices get same GUID on little/big endian platforms. */
     *guid16++ = SDL_SwapLE16(bus);
-    *guid16++ = SDL_SwapLE16(SDL_crc16(0, name, SDL_strlen(name)));
+    *guid16++ = SDL_SwapLE16(crc);
 
     if (vendor && product) {
         *guid16++ = SDL_SwapLE16(vendor);
@@ -2481,14 +2486,14 @@ SDL_JoystickGUID SDL_CreateJoystickGUID(Uint16 bus, Uint16 vendor, Uint16 produc
             guid.data[14] = driver_signature;
             guid.data[15] = driver_data;
         }
-        SDL_strlcpy((char *)guid16, name, available_space);
+        SDL_strlcpy((char *)guid16, product_name, available_space);
     }
     return guid;
 }
 
 SDL_JoystickGUID SDL_CreateJoystickGUIDForName(const char *name)
 {
-    return SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_UNKNOWN, 0, 0, 0, name, 0, 0);
+    return SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_UNKNOWN, 0, 0, 0, NULL, name, 0, 0);
 }
 
 void SDL_SetJoystickGUIDVendor(SDL_JoystickGUID *guid, Uint16 vendor)
diff --git a/src/joystick/SDL_joystick_c.h b/src/joystick/SDL_joystick_c.h
index 668f98a12..20d0e3307 100644
--- a/src/joystick/SDL_joystick_c.h
+++ b/src/joystick/SDL_joystick_c.h
@@ -71,7 +71,7 @@ extern int SDL_JoystickGetDeviceIndexFromInstanceID(SDL_JoystickID instance_id);
 extern char *SDL_CreateJoystickName(Uint16 vendor, Uint16 product, const char *vendor_name, const char *product_name);
 
 /* Function to create a GUID for a joystick based on the VID/PID and name */
-extern SDL_JoystickGUID SDL_CreateJoystickGUID(Uint16 bus, Uint16 vendor, Uint16 product, Uint16 version, const char *name, Uint8 driver_signature, Uint8 driver_data);
+extern SDL_JoystickGUID SDL_CreateJoystickGUID(Uint16 bus, Uint16 vendor, Uint16 product, Uint16 version, const char *vendor_name, const char *product_name, Uint8 driver_signature, Uint8 driver_data);
 
 /* Function to create a GUID for a joystick based on the name, with no VID/PID information */
 extern SDL_JoystickGUID SDL_CreateJoystickGUIDForName(const char *name);
diff --git a/src/joystick/android/SDL_sysjoystick.c b/src/joystick/android/SDL_sysjoystick.c
index 996f81214..0e3037d1d 100644
--- a/src/joystick/android/SDL_sysjoystick.c
+++ b/src/joystick/android/SDL_sysjoystick.c
@@ -344,7 +344,7 @@ int Android_AddJoystick(int device_id, const char *name, const char *desc, int v
         nhats = 0;
     }
 
-    guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor_id, product_id, 0, desc, 0, 0);
+    guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor_id, product_id, 0, NULL, desc, 0, 0);
 
     /* Update the GUID with capability bits */
     {
diff --git a/src/joystick/bsd/SDL_bsdjoystick.c b/src/joystick/bsd/SDL_bsdjoystick.c
index 5777c0689..39d503636 100644
--- a/src/joystick/bsd/SDL_bsdjoystick.c
+++ b/src/joystick/bsd/SDL_bsdjoystick.c
@@ -456,7 +456,7 @@ static int MaybeAddDevice(const char *path)
         struct usb_device_info di;
         if (ioctl(hw->fd, USB_GET_DEVICEINFO, &di) != -1) {
             name = SDL_CreateJoystickName(di.udi_vendorNo, di.udi_productNo, di.udi_vendor, di.udi_product);
-            guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, di.udi_vendorNo, di.udi_productNo, di.udi_releaseNo, name, 0, 0);
+            guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, di.udi_vendorNo, di.udi_productNo, di.udi_releaseNo, di.udi_vendor, di.udi_product, 0, 0);
 
 #ifdef SDL_JOYSTICK_HIDAPI
             if (HIDAPI_IsDevicePresent(di.udi_vendorNo, di.udi_productNo, di.udi_releaseNo, name)) {
diff --git a/src/joystick/darwin/SDL_iokitjoystick.c b/src/joystick/darwin/SDL_iokitjoystick.c
index 6acf9977e..a84426f8b 100644
--- a/src/joystick/darwin/SDL_iokitjoystick.c
+++ b/src/joystick/darwin/SDL_iokitjoystick.c
@@ -499,7 +499,7 @@ static SDL_bool GetDeviceInfo(IOHIDDeviceRef hidDevice, recDevice *pDevice)
     }
 #endif
 
-    pDevice->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, (Uint16)vendor, (Uint16)product, (Uint16)version, pDevice->product, 0, 0);
+    pDevice->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, (Uint16)vendor, (Uint16)product, (Uint16)version, manufacturer_string, product_string, 0, 0);
     pDevice->steam_virtual_gamepad_slot = GetSteamVirtualGamepadSlot((Uint16)vendor, (Uint16)product, product_string);
 
     array = IOHIDDeviceCopyMatchingElements(hidDevice, NULL, kIOHIDOptionsTypeNone);
diff --git a/src/joystick/hidapi/SDL_hidapijoystick.c b/src/joystick/hidapi/SDL_hidapijoystick.c
index aa565019c..b2d808523 100644
--- a/src/joystick/hidapi/SDL_hidapijoystick.c
+++ b/src/joystick/hidapi/SDL_hidapijoystick.c
@@ -666,7 +666,7 @@ void HIDAPI_SetDeviceName(SDL_HIDAPI_Device *device, const char *name)
 void HIDAPI_SetDeviceProduct(SDL_HIDAPI_Device *device, Uint16 vendor_id, Uint16 product_id)
 {
     /* Don't set the device product ID directly, or we'll constantly re-enumerate this device */
-    device->guid = SDL_CreateJoystickGUID(device->guid.data[0], vendor_id, product_id, device->version, device->name, 'h', 0);
+    device->guid = SDL_CreateJoystickGUID(device->guid.data[0], vendor_id, product_id, device->version, device->manufacturer_string, device->product_string, 'h', 0);
 }
 
 static void HIDAPI_UpdateJoystickSerial(SDL_HIDAPI_Device *device)
@@ -895,18 +895,11 @@ static SDL_HIDAPI_Device *HIDAPI_AddDevice(const struct SDL_hid_device_info *inf
 
     /* Need the device name before getting the driver to know whether to ignore this device */
     {
-        char *manufacturer_string = HIDAPI_ConvertString(info->manufacturer_string);
-        char *product_string = HIDAPI_ConvertString(info->product_string);
         char *serial_number = HIDAPI_ConvertString(info->serial_number);
 
-        device->name = SDL_CreateJoystickName(device->vendor_id, device->product_id, manufacturer_string, product_string);
-
-        if (manufacturer_string) {
-            SDL_free(manufacturer_string);
-        }
-        if (product_string) {
-            SDL_free(product_string);
-        }
+        device->manufacturer_string = HIDAPI_ConvertString(info->manufacturer_string);
+        device->product_string = HIDAPI_ConvertString(info->product_string);
+        device->name = SDL_CreateJoystickName(device->vendor_id, device->product_id, device->manufacturer_string, device->product_string);
 
         if (serial_number && *serial_number) {
             device->serial = serial_number;
@@ -915,6 +908,8 @@ static SDL_HIDAPI_Device *HIDAPI_AddDevice(const struct SDL_hid_device_info *inf
         }
 
         if (!device->name) {
+            SDL_free(device->manufacturer_string);
+            SDL_free(device->product_string);
             SDL_free(device->serial);
             SDL_free(device->path);
             SDL_free(device);
@@ -923,7 +918,7 @@ static SDL_HIDAPI_Device *HIDAPI_AddDevice(const struct SDL_hid_device_info *inf
     }
 
     /* FIXME: Is there any way to tell whether this is a Bluetooth device? */
-    device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, device->vendor_id, device->product_id, device->version, device->name, 'h', 0);
+    device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, device->vendor_id, device->product_id, device->version, device->manufacturer_string, device->product_string, 'h', 0);
     device->joystick_type = SDL_JOYSTICK_TYPE_GAMECONTROLLER;
     device->type = SDL_GetJoystickGameControllerProtocol(device->name, device->vendor_id, device->product_id, device->interface_number, device->interface_class, device->interface_subclass, device->interface_protocol);
 
@@ -993,6 +988,8 @@ static void HIDAPI_DelDevice(SDL_HIDAPI_Device *device)
 
             device->magic = NULL;
             SDL_DestroyMutex(device->dev_lock);
+            SDL_free(device->manufacturer_string);
+            SDL_free(device->product_string);
             SDL_free(device->serial);
             SDL_free(device->name);
             SDL_free(device->path);
diff --git a/src/joystick/hidapi/SDL_hidapijoystick_c.h b/src/joystick/hidapi/SDL_hidapijoystick_c.h
index 8073f46ec..c12a12537 100644
--- a/src/joystick/hidapi/SDL_hidapijoystick_c.h
+++ b/src/joystick/hidapi/SDL_hidapijoystick_c.h
@@ -59,6 +59,8 @@ typedef struct _SDL_HIDAPI_Device
 {
     const void *magic;
     char *name;
+    char *manufacturer_string;
+    char *product_string;
     char *path;
     Uint16 vendor_id;
     Uint16 product_id;
diff --git a/src/joystick/iphoneos/SDL_mfijoystick.m b/src/joystick/iphoneos/SDL_mfijoystick.m
index fea8c3a39..9a9a4defc 100644
--- a/src/joystick/iphoneos/SDL_mfijoystick.m
+++ b/src/joystick/iphoneos/SDL_mfijoystick.m
@@ -666,7 +666,7 @@ static BOOL IOS_AddMFIJoystickDevice(SDL_JoystickDeviceItem *device, GCControlle
     } else {
         signature = device->button_mask;
     }
-    device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor, product, signature, name, 'm', subtype);
+    device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor, product, signature, NULL, name, 'm', subtype);
 
     if (SDL_ShouldIgnoreJoystick(name, device->guid)) {
         return SDL_FALSE;
diff --git a/src/joystick/linux/SDL_sysjoystick.c b/src/joystick/linux/SDL_sysjoystick.c
index 0ca816c80..af8646267 100644
--- a/src/joystick/linux/SDL_sysjoystick.c
+++ b/src/joystick/linux/SDL_sysjoystick.c
@@ -319,7 +319,7 @@ static int IsJoystick(const char *path, int fd, char **name_return, Uint16 *vend
     SDL_Log("Joystick: %s, bustype = %d, vendor = 0x%.4x, product = 0x%.4x, version = %d\n", name, inpid.bustype, inpid.vendor, inpid.product, inpid.version);
 #endif
 
-    *guid = SDL_CreateJoystickGUID(inpid.bustype, inpid.vendor, inpid.product, inpid.version, name, 0, 0);
+    *guid = SDL_CreateJoystickGUID(inpid.bustype, inpid.vendor, inpid.product, inpid.version, NULL, product_string, 0, 0);
 
     if (SDL_ShouldIgnoreJoystick(name, *guid)) {
         SDL_free(name);
diff --git a/src/joystick/virtual/SDL_virtualjoystick.c b/src/joystick/virtual/SDL_virtualjoystick.c
index c0323b2c2..4a7021b1f 100644
--- a/src/joystick/virtual/SDL_virtualjoystick.c
+++ b/src/joystick/virtual/SDL_virtualjoystick.c
@@ -191,7 +191,7 @@ int SDL_JoystickAttachVirtualInner(const SDL_VirtualJoystickDesc *desc)
         }
     }
 
-    hwdata->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_VIRTUAL, hwdata->desc.vendor_id, hwdata->desc.product_id, 0, name, 'v', (Uint8)hwdata->desc.type);
+    hwdata->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_VIRTUAL, hwdata->desc.vendor_id, hwdata->desc.product_id, 0, NULL, name, 'v', (Uint8)hwdata->desc.type);
 
     /* Allocate fields for different control-types */
     if (hwdata->desc.naxes > 0) {
diff --git a/src/joystick/windows/SDL_dinputjoystick.c b/src/joystick/windows/SDL_dinputjoystick.c
index 9919f23ad..c170371fb 100644
--- a/src/joystick/windows/SDL_dinputjoystick.c
+++ b/src/joystick/windows/SDL_dinputjoystick.c
@@ -511,9 +511,9 @@ static BOOL CALLBACK EnumJoystickDetectCallback(LPCDIDEVICEINSTANCE pDeviceInsta
     CHECK(pNewJoystick->joystickname);
 
     if (vendor && product) {
-        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, vendor, product, version, pNewJoystick->joystickname, 0, 0);
+        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, vendor, product, version, NULL, name, 0, 0);
     } else {
-        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor, product, version, pNewJoystick->joystickname, 0, 0);
+        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_BLUETOOTH, vendor, product, version, NULL, name, 0, 0);
     }
 
     CHECK(!SDL_ShouldIgnoreJoystick(pNewJoystick->joystickname, pNewJoystick->guid));
diff --git a/src/joystick/windows/SDL_rawinputjoystick.c b/src/joystick/windows/SDL_rawinputjoystick.c
index ad82d925c..c44566f08 100644
--- a/src/joystick/windows/SDL_rawinputjoystick.c
+++ b/src/joystick/windows/SDL_rawinputjoystick.c
@@ -916,6 +916,7 @@ static void RAWINPUT_AddDevice(HANDLE hDevice)
         }
 
         device->name = SDL_CreateJoystickName(device->vendor_id, device->product_id, manufacturer_string, product_string);
+        device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, device->vendor_id, device->product_id, device->version, manufacturer_string, product_string, 'r', 0);
 
         if (manufacturer_string) {
             SDL_free(manufacturer_string);
@@ -925,8 +926,6 @@ static void RAWINPUT_AddDevice(HANDLE hDevice)
         }
     }
 
-    device->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, device->vendor_id, device->product_id, device->version, device->name, 'r', 0);
-
     device->path = SDL_strdup(dev_name);
 
     CloseHandle(hFile);
diff --git a/src/joystick/windows/SDL_windows_gaming_input.c b/src/joystick/windows/SDL_windows_gaming_input.c
index 35378f744..12752f62d 100644
--- a/src/joystick/windows/SDL_windows_gaming_input.c
+++ b/src/joystick/windows/SDL_windows_gaming_input.c
@@ -527,7 +527,7 @@ static HRESULT STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_InvokeAdde
                 __x_ABI_CWindows_CGaming_CInput_CIGameController_Release(gamecontroller);
             }
 
-            guid = SDL_CreateJoystickGUID(bus, vendor, product, version, name, 'w', (Uint8)type);
+            guid = SDL_CreateJoystickGUID(bus, vendor, product, version, NULL, name, 'w', (Uint8)type);
 
             if (SDL_ShouldIgnoreJoystick(name, guid)) {
                 ignore_joystick = SDL_TRUE;
diff --git a/src/joystick/windows/SDL_xinputjoystick.c b/src/joystick/windows/SDL_xinputjoystick.c
index c12bd1fbf..87bbe0426 100644
--- a/src/joystick/windows/SDL_xinputjoystick.c
+++ b/src/joystick/windows/SDL_xinputjoystick.c
@@ -156,6 +156,7 @@ int SDL_XINPUT_GetSteamVirtualGamepadSlot(Uint8 userid)
 
 static void AddXInputDevice(Uint8 userid, BYTE SubType, JoyStick_DeviceData **pContext)
 {
+    const char *name = NULL;
     Uint16 vendor = 0;
     Uint16 product = 0;
     Uint16 version = 0;
@@ -207,16 +208,17 @@ static void AddXInputDevice(Uint8 userid, BYTE SubType, JoyStick_DeviceData **pC
         return; /* better luck next time? */
     }
 
+    name = GetXInputName(userid, SubType);
     GetXInputDeviceInfo(userid, &vendor, &product, &version);
     pNewJoystick->bXInputDevice = SDL_TRUE;
-    pNewJoystick->joystickname = SDL_CreateJoystickName(vendor, product, NULL, GetXInputName(userid, SubType));
+    pNewJoystick->joystickname = SDL_CreateJoystickName(vendor, product, NULL, name);
     if (!pNewJoystick->joystickname) {
         SDL_free(pNewJoystick);
         return; /* better luck next time? */
     }
     (void)SDL_snprintf(pNewJoystick->path, sizeof(pNewJoystick->path), "XInput#%d", userid);
     if (!SDL_XInputUseOldJoystickMapping()) {
-        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, vendor, product, version, pNewJoystick->joystickname, 'x', SubType);
+        pNewJoystick->guid = SDL_CreateJoystickGUID(SDL_HARDWARE_BUS_USB, vendor, product, version, NULL, name, 'x', SubType);
     }
     pNewJoystick->SubType = SubType;
     pNewJoystick->XInputUserId = userid;