[.NET] Fix string.PathJoin to be consistent with core

zaevi · zaevi · commit e8311840e40b · 2025-04-11T23:21:29.000+08:00
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/StringExtensions.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/StringExtensions.cs
@@ -1315,7 +1315,9 @@ public static string PadZeros(this string instance, int digits)
         /// <returns>The concatenated path with the given file name.</returns>
         public static string PathJoin(this string instance, string file)
         {
-            if (instance.Length > 0 && instance[instance.Length - 1] == '/')
+            if (instance.Length == 0)
+                return file;
+            if (instance[^1] == '/' || (file.Length > 0 && file[0] == '/'))
                 return instance + file;
             return instance + "/" + file;
         }

Original file line number	Diff line number	Diff line change
`@@ -1315,7 +1315,9 @@ public static string PadZeros(this string instance, int digits)`
`1315`	`1315`	`/// <returns>The concatenated path with the given file name.</returns>`
`1316`	`1316`	`public static string PathJoin(this string instance, string file)`
`1317`	`1317`	`{`
`1318`		`- if (instance.Length > 0 && instance[instance.Length - 1] == '/')`
	`1318`	`+ if (instance.Length == 0)`
	`1319`	`+ return file;`
	`1320`	`+ if (instance[^1] == '/' \|\| (file.Length > 0 && file[0] == '/'))`
`1319`	`1321`	`return instance + file;`
`1320`	`1322`	`return instance + "/" + file;`
`1321`	`1323`	`}`