ISXB-449 fix for turkish letter i

Assets/Tests/InputSystem/CoreTests_Controls.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Globalization;
 using System.Linq;
+using System.Threading;
 using NUnit.Framework;
 using Unity.Collections;
 using Unity.Collections.LowLevel.Unsafe;
@@ -916,6 +918,22 @@ public void Controls_CanFindControlsByExactPathCaseInsensitive()
         }
     }
 
+    [Test]
+    [Category("Controls")]
+    public void Controls_FindControl_FindsControlDespiteTurkishCulture()
+    {
+        var culture = CultureInfo.CurrentCulture;
+        Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("tr-TR");
+
+        var gamepad = InputSystem.AddDevice<Gamepad>();
+        using (var matches = InputSystem.FindControls("/gamePAD/LEFTSTICK"))
+        {
+            Assert.That(matches, Has.Count.EqualTo(1));
+            Assert.That(matches, Has.Exactly(1).SameAs(gamepad.leftStick));
+        }
+        Thread.CurrentThread.CurrentCulture = culture;
+    }
+
     [Test]
     [Category("Controls")]
     [TestCase("<Gamepad>{LeftHand}foo/*/left", "layout:Gamepad,usage:LeftHand,name:foo", "wildcard:", "name:left")]

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -18,6 +18,9 @@ however, it has to be formatted properly to pass verification tests.
 ### Changed
 - Changed XR Layout build behavior to create Axis2D control devices with `StickControl` type instead of `Vector2Control`.
 
+### Fixed
+- Fixed BindingPath String-Comparison to be culture and case insensitive (case ISXB-449).
+
 ## [1.5.1] - 2023-03-15
 
 ### Fixed

Packages/com.unity.inputsystem/InputSystem/Controls/InputControlPath.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Text;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using Unity.Collections;
 using UnityEngine.InputSystem.Layouts;
@@ -558,15 +559,15 @@ private static bool StringMatches(Substring str, InternedString matchTo)
                         return true; // Wildcard at end of string so rest is matched.
 
                     ++posInStr;
-                    nextChar = char.ToLower(str[posInStr]);
+                    nextChar = char.ToLower(str[posInStr], CultureInfo.InvariantCulture);
 
                     while (posInMatchTo < matchToLength && matchToLowerCase[posInMatchTo] != nextChar)
                         ++posInMatchTo;
 
                     if (posInMatchTo == matchToLength)
                         return false; // Matched all the way to end of matchTo but there's more in str after the wildcard.
                 }
-                else if (char.ToLower(nextChar) != matchToLowerCase[posInMatchTo])
+                else if (char.ToLower(nextChar, CultureInfo.InvariantCulture) != matchToLowerCase[posInMatchTo])
                 {
                     return false;
                 }
@@ -1107,7 +1108,7 @@ private static bool MatchPathComponent(string component, string path, ref int in
                 }
 
                 var charInComponent = component[indexInComponent];
-                if (charInComponent == nextCharInPath || char.ToLower(charInComponent) == char.ToLower(nextCharInPath))
+                if (charInComponent == nextCharInPath || char.ToLower(charInComponent, CultureInfo.InvariantCulture) == char.ToLower(nextCharInPath, CultureInfo.InvariantCulture))
                 {
                     ++indexInComponent;
                     ++indexInPath;

Packages/com.unity.inputsystem/InputSystem/Utilities/StringHelpers.cs

@@ -418,7 +418,7 @@ public static bool CharacterSeparatedListsHaveAtLeastOneCommonElement(string fir
                             var first = firstList[startIndexInFirst + i];
                             var second = secondList[startIndexInSecond + i];
 
-                            if (char.ToLower(first) != char.ToLower(second))
+                            if (char.ToLowerInvariant(first) != char.ToLowerInvariant(second))
                             {
                                 isMatch = false;
                                 break;