Add hotfix for UTF-8 properties file.

Author: Fox2Code

loader/src/main/java/com/fox2code/foxloader/client/gui/GuiConfigProviderConfigObject.java

@@ -1,3 +1,26 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2023-2025 Fox2Code
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 package com.fox2code.foxloader.client.gui;
 
 import net.minecraft.client.gui.GuiScreen;

loader/src/main/java/com/fox2code/foxloader/internal/InternalHotfixesHooks.java

@@ -0,0 +1,38 @@
+/*
+ * MIT License
+ * 
+ * Copyright (c) 2023-2025 Fox2Code
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.fox2code.foxloader.internal;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.Properties;
+
+public class InternalHotfixesHooks {
+    public static void loadProperties(Properties properties, InputStream inputStream) throws IOException {
+        properties.load(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
+    }
+
+    public static void storeProperties(Properties properties, OutputStream outputStream, String comment) throws IOException {
+        properties.store(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8), comment);
+    }
+}

patching/src/main/java/com/fox2code/foxloader/patching/game/HotfixesPatch.java

@@ -23,21 +23,50 @@
  */
 package com.fox2code.foxloader.patching.game;
 
+import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.tree.*;
 
 /**
  * Theses are just hotfixes for the game, dedicated to fixing ReIndev bugs and crashes.
  */
 final class HotfixesPatch extends GamePatch {
-    static final boolean USE_HOTFIXES = false;
+    private static final String PropertyManager = "net/minecraft/server/util/PropertyManager";
+    private static final String Properties = "java/util/Properties";
+    private static final String InternalHotfixesHooks = "com/fox2code/foxloader/internal/InternalHotfixesHooks";
+    static final boolean USE_HOTFIXES = true;
 
     HotfixesPatch() {
-        super(new String[]{});
+        super(new String[]{PropertyManager});
     }
 
     @Override
     public ClassNode transform(ClassNode classNode) {
+        if (PropertyManager.equals(classNode.name)) {
+            patchPropertyManager(classNode);
+        }
         return classNode;
     }
 
+    private static void patchPropertyManager(ClassNode classNode) {
+        for (MethodNode methodNode : classNode.methods) {
+            for (AbstractInsnNode abstractInsnNode : methodNode.instructions) {
+                if (abstractInsnNode.getOpcode() == Opcodes.INVOKEVIRTUAL) {
+                    MethodInsnNode methodInsnNode = (MethodInsnNode) abstractInsnNode;
+                    if (Properties.equals(methodInsnNode.owner)) {
+                        if ("load".equals(methodInsnNode.name) &&
+                                "(Ljava/io/InputStream;)V".equals(methodInsnNode.desc)) {
+                            methodNode.instructions.set(methodInsnNode, new MethodInsnNode(
+                                    Opcodes.INVOKESTATIC, InternalHotfixesHooks, "loadProperties",
+                                    "(L" + Properties + ";Ljava/io/InputStream;)V"));
+                        } else if ("store".equals(methodInsnNode.name) &&
+                                "(Ljava/io/OutputStream;Ljava/lang/String;)V".equals(methodInsnNode.desc)) {
+                            methodNode.instructions.set(methodInsnNode, new MethodInsnNode(
+                                    Opcodes.INVOKESTATIC, InternalHotfixesHooks, "storeProperties",
+                                    "(L" + Properties + ";Ljava/io/OutputStream;Ljava/lang/String;)V"));
+                        }
+                    }
+                }
+            }
+        }
+    }
 }