Alistair Leslie-Hughes : xinput: Check that we actually received a value before assignment.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 72e62952db9104b03d136d9fa0ebdb1e8aa6ae52
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=72e62952db9104b03d136d9fa...

Author: Alistair Leslie-Hughes 
Date:   Wed Apr 24 00:58:15 2019 +0000

xinput: Check that we actually received a value before assignment.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46999
Signed-off-by: Alistair Leslie-Hughes 
Signed-off-by: Alexandre Julliard

---

dlls/xinput1_3/hid.c | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/dlls/xinput1_3/hid.c b/dlls/xinput1_3/hid.c
index c0c405f..1ccecb1 100644
--- a/dlls/xinput1_3/hid.c
+++ b/dlls/xinput1_3/hid.c
@@ -388,23 +388,29 @@ void HID_update_state(xinput_controller* device)
         }
     }

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_X, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.sThumbLX = scale_short(value, &private->lx);
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_X, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.sThumbLX = scale_short(value, &private->lx);

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_Y, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.sThumbLY = -scale_short(value, &private->ly) - 1;
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_Y, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.sThumbLY = -scale_short(value, &private->ly) - 1;

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RX, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.sThumbRX = scale_short(value, &private->rx);
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RX, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.sThumbRX = scale_short(value, &private->rx);

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RY, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.sThumbRY = -scale_short(value, &private->ry) - 1;
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RY, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.sThumbRY = -scale_short(value, &private->ry) - 1;

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RZ, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.bRightTrigger = scale_byte(value, &private->rtrigger);
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_RZ, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.bRightTrigger = scale_byte(value, &private->rtrigger);

-    HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_Z, &value, private->ppd, target_report, private->report_length);
-    device->state.Gamepad.bLeftTrigger = scale_byte(value, &private->ltrigger);
+    if(HidP_GetScaledUsageValue(HidP_Input, HID_USAGE_PAGE_GENERIC, 0, HID_USAGE_GENERIC_Z, &value,
+                                    private->ppd, target_report, private->report_length) == HIDP_STATUS_SUCCESS)
+        device->state.Gamepad.bLeftTrigger = scale_byte(value, &private->ltrigger);
     LeaveCriticalSection(&private->crit);
 }