first commit

NitroxPatcher/Patches/Persistent/CellManager_TryLoadCacheBatchCells_Patch.cs

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+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Reflection.Emit;
+using HarmonyLib;
+using NitroxModel.Helper;
+
+namespace NitroxPatcher.Patches.Persistent
+{
+    public partial class CellManager_TryLoadCacheBatchCells_Patch : NitroxPatch, IPersistentPatch
+    {
+        private static readonly MethodInfo TARGET_METHOD = Reflect.Method((CellManager t) => t.TryLoadCacheBatchCells(default(BatchCells)));
+        private static readonly MethodInfo PATH_PREFIX_GETTER = Reflect.Property((LargeWorldStreamer t) => t.pathPrefix).GetMethod;
+
+        public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions, ILGenerator generator)
+        {
+            List<CodeInstruction> instrList = instructions.ToList();
+
+            Label pathPrefixJmp = generator.DefineLabel();
+
+            Label labeledPathInstructionJmp = generator.DefineLabel();
+
+            Label fallbackPrefixJmp = generator.DefineLabel();
+
+            Label labeledFallbackInstructionJmp = generator.DefineLabel();
+
+            for (int i = 0; i < instrList.Count; i++)
+            {
+                CodeInstruction instruction = instrList[i];
+                if (instrList.Count > i + 2 && instrList[i + 2].opcode == OpCodes.Callvirt && ReferenceEquals(instrList[i + 2].operand, PATH_PREFIX_GETTER))
+                {
+                    foreach (CodeInstruction instr in TranspilerHelper.IsMultiplayer(pathPrefixJmp, generator))
+                    {
+                        yield return instr;
+                    }
+
+                    yield return new CodeInstruction(OpCodes.Ldstr, ""); // Replace pathPrefix with an empty string
+                    yield return new CodeInstruction(OpCodes.Br, labeledPathInstructionJmp);
+                    instrList[i].labels.Add(pathPrefixJmp);
+                    yield return instrList[i];
+                    yield return instrList[i + 1];
+                    yield return instrList[i + 2];
+
+                    CodeInstruction labeledCodeInstruction = new(instrList[i + 3].opcode, instrList[i + 3].operand);
+                    labeledCodeInstruction.labels.Add(labeledPathInstructionJmp);
+
+                    yield return labeledCodeInstruction;
+                    i += 3;
+                }
+                else
+                {
+                    yield return instruction;
+                }
+            }
+        }
+    }
+}