protected bool CheckPrefix(string code)
{
if (Prefixes.Count > 0)
{
return(Prefixes.Any(p => code?.StartsWith(p) == true));
}
return(true);
}
private IEnumerable <MsilInstruction> EmitPatched(Func <Type, bool, MsilLocal> declareLocal)
{
var methodBody = _method.GetMethodBody();
Debug.Assert(methodBody != null, "Method body is null");
foreach (var localVar in methodBody.LocalVariables)
{
Debug.Assert(localVar.LocalType != null);
declareLocal(localVar.LocalType, localVar.IsPinned);
}
var instructions = new List <MsilInstruction>();
var specialVariables = new Dictionary <string, MsilLocal>();
var labelAfterOriginalContent = new MsilLabel();
var labelSkipMethodContent = new MsilLabel();
Type returnType = _method is MethodInfo meth ? meth.ReturnType : typeof(void);
MsilLocal resultVariable = null;
if (returnType != typeof(void))
{
if (Prefixes.Concat(Suffixes).SelectMany(x => x.GetParameters()).Any(x => x.Name == RESULT_PARAMETER) ||
Prefixes.Any(x => x.ReturnType == typeof(bool)))
{
resultVariable = declareLocal(returnType, false);
}
}
if (resultVariable != null)
{
instructions.AddRange(resultVariable.SetToDefault());
}
MsilLocal prefixSkippedVariable = null;
if (Prefixes.Count > 0 && Suffixes.Any(x => x.GetParameters()
.Any(y => y.Name.Equals(PREFIX_SKIPPED_PARAMETER))))
{
prefixSkippedVariable = declareLocal(typeof(bool), false);
specialVariables.Add(PREFIX_SKIPPED_PARAMETER, prefixSkippedVariable);
}
if (resultVariable != null)
{
specialVariables.Add(RESULT_PARAMETER, resultVariable);
}
// Create special variables
foreach (var m in Prefixes.Concat(Suffixes))
{
foreach (var param in m.GetParameters())
{
if (param.Name.StartsWith(LOCAL_PARAMETER))
{
var requiredType = param.ParameterType.IsByRef ? param.ParameterType.GetElementType() : param.ParameterType;
if (specialVariables.TryGetValue(param.Name, out var existingParam))
{
if (existingParam.Type != requiredType)
{
throw new ArgumentException(
$"Trying to use injected local {param.Name} for {m.DeclaringType?.FullName}#{m.ToString()} with type {requiredType} but a local with the same name already exists with type {existingParam.Type}",
param.Name);
}
}
else
{
specialVariables.Add(param.Name, declareLocal(requiredType, false));
}
}
}
}
foreach (MethodInfo prefix in Prefixes)
{
instructions.AddRange(EmitMonkeyCall(prefix, specialVariables));
if (prefix.ReturnType == typeof(bool))
{
instructions.Add(new MsilInstruction(OpCodes.Brfalse).InlineTarget(labelSkipMethodContent));
}
else if (prefix.ReturnType != typeof(void))
{
throw new Exception(
$"Prefixes must return void or bool. {prefix.DeclaringType?.FullName}.{prefix.Name} returns {prefix.ReturnType}");
}
}
instructions.AddRange(MethodTranspiler.Transpile(_method, (x) => declareLocal(x, false), Transpilers, labelAfterOriginalContent));
instructions.Add(new MsilInstruction(OpCodes.Nop).LabelWith(labelAfterOriginalContent));
if (resultVariable != null)
{
instructions.Add(new MsilInstruction(OpCodes.Stloc).InlineValue(resultVariable));
}
var notSkip = new MsilLabel();
instructions.Add(new MsilInstruction(OpCodes.Br).InlineTarget(notSkip));
instructions.Add(new MsilInstruction(OpCodes.Nop).LabelWith(labelSkipMethodContent));
if (prefixSkippedVariable != null)
{
instructions.Add(new MsilInstruction(OpCodes.Ldc_I4_1));
instructions.Add(new MsilInstruction(OpCodes.Stloc).InlineValue(prefixSkippedVariable));
}
instructions.Add(new MsilInstruction(OpCodes.Nop).LabelWith(notSkip));
foreach (MethodInfo suffix in Suffixes)
{
instructions.AddRange(EmitMonkeyCall(suffix, specialVariables));
if (suffix.ReturnType != typeof(void))
{
throw new Exception($"Suffixes must return void. {suffix.DeclaringType?.FullName}.{suffix.Name} returns {suffix.ReturnType}");
}
}
if (resultVariable != null)
{
instructions.Add(new MsilInstruction(OpCodes.Ldloc).InlineValue(resultVariable));
}
instructions.Add(new MsilInstruction(OpCodes.Ret));
var result = MethodTranspiler.Transpile(_method, instructions, (x) => declareLocal(x, false), PostTranspilers, null).ToList();
if (result.Last().OpCode != OpCodes.Ret)
{
result.Add(new MsilInstruction(OpCodes.Ret));
}
return(result);
}
public static void ManagePrefixGroups(CommandArgs args)
{
bool Add = args.Parameters[0].ToLower() == "add";
if (Add)
{
if (args.Parameters.Count < 5)
{
args.Player.SendErrorMessage(TShock.Config.CommandSpecifier + "bprefix add group [Name] [Permission] [AllowedPrefixes (1 3 10...)]");
return;
}
string Name = args.Parameters[2];
if (Prefixes.Any(b => b.Name == Name))
{
args.Player.SendErrorMessage("Prefix group with '{0}' name already exists.", Name);
return;
}
string Permission = args.Parameters[3];
List <int> AllowedPrefixes = new List <int>();
for (int i = 4; i < args.Parameters.Count; i++)
{
if (!int.TryParse(args.Parameters[i], out int PrefixID) ||
(PrefixID < 0) || (PrefixID > (Lang.prefix.Length - 1)))
{
args.Player.SendErrorMessage("Invalid PrefixID '{0}'!", args.Parameters[i]);
continue;
}
AllowedPrefixes.Add(PrefixID);
}
var BTP = new BTPrefix(Name, Permission, AllowedPrefixes);
Prefixes.Add(BTP);
BTDatabase.PAdd(BTP);
args.Player.SendSuccessMessage("Successfully added new prefix group with given name: {0}.", Name);
}
else
{
if (args.Parameters.Count != 3)
{
args.Player.SendErrorMessage(TShock.Config.CommandSpecifier + "bprefix del group [Name]");
return;
}
string Name = args.Parameters[2];
bool Success = false;
foreach (var p in Prefixes)
{
if (p.Name == Name)
{
Success = true;
Prefixes.Remove(p);
break;
}
}
if (Success)
{
args.Player.SendSuccessMessage("Successfully deleted prefix group with given name: {0}.", Name);
BTDatabase.PDelete(Name);
}
else
{
args.Player.SendErrorMessage("Invalid PrefixGroup name!");
}
}
}