public static IEnumerable <CodeInstruction> Transpiler(IEnumerable <CodeInstruction> instructions)
{
List <CodeInstruction> codes = TranspilerUtil.ToCodeList(instructions);
MethodInfo calcStopPosAndDir = typeof(NetLane).GetMethod(nameof(NetLane.CalculateStopPositionAndDirection));
CodeInstruction searchInstr = new CodeInstruction(OpCodes.Call, calcStopPosAndDir);
int index = codes.FindIndex(instr => TranspilerUtil.IsSameInstruction(instr, searchInstr));
if (index > -1)
{
int targetIndex = index + 1;
int replace1stIndex = targetIndex + 3;
if (codes[replace1stIndex].opcode.Equals(OpCodes.Ldarg_2))
{
codes.RemoveRange(replace1stIndex + 1, 6);
codes.Insert(replace1stIndex + 1, new CodeInstruction(OpCodes.Ldloc_3));
}
else
{
throw new Exception("Could not find Ldarg.2 instruction or instructions has been patched");
}
codes.InsertRange(targetIndex, GetInstructions());
}
else
{
throw new Exception("Could not find CalculateStopPositionAndDirection call or instructions has been patched");
}
return(codes);
}
/// <summary>
/// Revrites instructions adding necessary TMPE calls
/// </summary>
/// <param name="il"> Il Generator</param>
/// <param name="instructions">List of instructions</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public static IEnumerable <CodeInstruction> TranspileTramTrainSimulationStep(ILGenerator il, IEnumerable <CodeInstruction> instructions)
{
List <CodeInstruction> codes = TranspilerUtil.ToCodeList(instructions);
MethodBase trySpawnCall = TranspilerUtil.DeclaredMethod <TrySpawnDelegate>(typeof(VehicleAI), "TrySpawn");
CodeInstruction searchInstruction = new CodeInstruction(OpCodes.Callvirt, trySpawnCall);
int index = codes.FindIndex(instruction => TranspilerUtil.IsSameInstruction(instruction, searchInstruction));
if (index > -1)
{
int target1 = index + 2;
Label label = il.DefineLabel();
List <Label> oldLabels = codes[target1].labels.ToList();
codes[target1].labels.Clear(); // clear labels -> they are moved to new instruction
codes[target1].labels.Add(label); //add label to next instruction (if() false jump)
List <CodeInstruction> newInstructions = GetUpdatePositionInstructions(label);
newInstructions[0].labels.AddRange(oldLabels); // add old labels to redirect here
codes.InsertRange(target1, newInstructions); // insert new instructions
CodeInstruction searchInstruction2 = new CodeInstruction(OpCodes.Ldfld, typeof(Vehicle).GetField(nameof(Vehicle.m_blockCounter)));
int index2 = codes.FindIndex(instruction => TranspilerUtil.IsSameInstruction(instruction, searchInstruction2));
if (index2 > -1 && codes[index2 + 1].opcode.Equals(OpCodes.Ldc_I4) && codes[index2 + 2].opcode.Equals(OpCodes.Bne_Un))
{
int target2 = index2 + 2;
Label retLabel = (Label)codes[target2].operand;
codes.InsertRange(target2 + 1, GetModifiedBlockCounterInstructions(retLabel));
}
else
{
throw new Exception("Could not find m_blockCounter field usage or instructions has been patched");
}
}
else
{
throw new Exception("Could not find TrySpawn call or instructions has been patched");
}
return(codes);
}