public static IEnumerable <CodeInstruction> Transpiler(IEnumerable <CodeInstruction> instructions)
{
List <CodeInstruction> codes = TranspilerUtil.ToCodeList(instructions);
int minus1OpIndex = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Ldc_I4_M1), 0);
//check index and previous instruction
if (minus1OpIndex != -1 && codes[minus1OpIndex + 1].opcode.Equals(OpCodes.Bne_Un))
{
int ldArg0Index = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Ldarg_0), minus1OpIndex);
//check index and previous instruction
if (ldArg0Index != -1 && codes[ldArg0Index - 1].opcode.Equals(OpCodes.Stfld))
{
int targetIndex = minus1OpIndex + 2;//move index to first item to remove
// replace all instruction between targetIndex and Ldarg_0
codes.RemoveRange(targetIndex, ldArg0Index - targetIndex);
codes.InsertRange(targetIndex, GetReplacementInstructions());
}
else
{
throw new Exception("Could not found Ldarg_0 Instruction or instruction was already patched!");
}
}
else
{
throw new Exception("Could not found Ldc_I4_M1 Instruction or previous instruction was already patched!");
}
return(codes);
}
public static IEnumerable <CodeInstruction> Transpiler(IEnumerable <CodeInstruction> instructions)
{
List <CodeInstruction> codes = TranspilerUtil.ToCodeList(instructions);
int minus1OpIndex = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Ldc_I4_M1), 0);
//check index and previous instruction
if (minus1OpIndex != -1 && codes[minus1OpIndex + 1].opcode.Equals(OpCodes.Bne_Un))
{
int ldArg0Index = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Ldarg_0), minus1OpIndex);
//check index and previous instruction
if (ldArg0Index != -1 && codes[ldArg0Index - 1].opcode.Equals(OpCodes.Stfld))
{
int targetIndex = minus1OpIndex + 2;//move index to first item to remove
// replace all instruction between targetIndex and Ldarg_0
codes.RemoveRange(targetIndex, ldArg0Index - targetIndex);
var newInstructions = new[] {
new CodeInstruction(OpCodes.Ldarg_1), // load node id
new CodeInstruction(OpCodes.Call, typeof(ClickNodeButtonPatch).GetMethod(nameof(ClickNodeButtonPatch.ToggleTrafficLight))),
};
codes.InsertRange(targetIndex, newInstructions);
}
else
{
throw new Exception("Could not found Ldarg_0 Instruction or instruction was already patched!");
}
}
else
{
throw new Exception("Could not found Ldc_I4_M1 Instruction or previous instruction was already patched!");
}
return(codes);
}
public static IEnumerable <CodeInstruction> Transpiler(ILGenerator il, IEnumerable <CodeInstruction> instructions)
{
List <CodeInstruction> codes = TranspilerUtil.ToCodeList(instructions);
int searchInstruction = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Call, CheckSegmentProblemsMethod()), 0, 1, 3);
if (searchInstruction != -1 &&
codes[searchInstruction + 1].opcode.Equals(OpCodes.Ldc_I4_1) &&
codes[searchInstruction + 2].opcode.Equals(OpCodes.Ret))
{
int startTarget = searchInstruction + 3; //first instruction to remove, contains labels to copy
int createPathCallIndex = TranspilerUtil.SearchInstruction(codes, new CodeInstruction(OpCodes.Callvirt, CreatePathMethod()), startTarget);
if (createPathCallIndex != -1 && codes[createPathCallIndex + 1].opcode.Equals(OpCodes.Brfalse))
{
List <Label> labels = codes[startTarget].labels;
codes.RemoveRange(startTarget, createPathCallIndex + 1 - startTarget);
codes.InsertRange(startTarget, GetInjectInstructions(labels));
}
else
{
throw new Exception("Could not find CreatePath call or instructions has been patched");
}
}
else
{
throw new Exception("Could not find 3rd. CheckSegmentProblems call or instructions has been patched");
}
return(codes);
}