static MethodDefinition GenerateCollectionWriter(TypeReference variable, TypeReference elementType, string writerFunction)
{
MethodDefinition writerFunc = GenerateWriterFunc(variable);
MethodReference elementWriteFunc = GetWriteFunc(elementType);
MethodReference intWriterFunc = GetWriteFunc(WeaverTypes.Import <int>());
// need this null check till later PR when GetWriteFunc throws exception instead
if (elementWriteFunc == null)
{
Weaver.Error($"Cannot generate writer for {variable}. Use a supported type or provide a custom writer", variable);
return(writerFunc);
}
ModuleDefinition module = Weaver.CurrentAssembly.MainModule;
TypeReference readerExtensions = module.ImportReference(typeof(NetworkWriterExtensions));
MethodReference collectionWriter = Resolvers.ResolveMethod(readerExtensions, Weaver.CurrentAssembly, writerFunction);
GenericInstanceMethod methodRef = new GenericInstanceMethod(collectionWriter);
methodRef.GenericArguments.Add(elementType);
// generates
// reader.WriteArray<T>(array);
ILProcessor worker = writerFunc.Body.GetILProcessor();
worker.Emit(OpCodes.Ldarg_0); // writer
worker.Emit(OpCodes.Ldarg_1); // collection
worker.Emit(OpCodes.Call, methodRef); // WriteArray
worker.Emit(OpCodes.Ret);
return(writerFunc);
}
static void WriteNullCheck(ILProcessor worker)
{
// if (value == null)
// {
// writer.WriteBoolean(false);
// return;
// }
//
Instruction labelNotNull = worker.Create(OpCodes.Nop);
worker.Emit(OpCodes.Ldarg_1);
worker.Emit(OpCodes.Brtrue, labelNotNull);
worker.Emit(OpCodes.Ldarg_0);
worker.Emit(OpCodes.Ldc_I4_0);
worker.Emit(OpCodes.Call, GetWriteFunc(WeaverTypes.Import <bool>()));
worker.Emit(OpCodes.Ret);
worker.Append(labelNotNull);
// write.WriteBoolean(true);
worker.Emit(OpCodes.Ldarg_0);
worker.Emit(OpCodes.Ldc_I4_1);
worker.Emit(OpCodes.Call, GetWriteFunc(WeaverTypes.Import <bool>()));
}
static MethodDefinition GenerateReaderFunction(TypeReference variable)
{
string functionName = "_Read_" + variable.FullName;
// create new reader for this type
MethodDefinition readerFunc = new MethodDefinition(functionName,
MethodAttributes.Public |
MethodAttributes.Static |
MethodAttributes.HideBySig,
variable);
readerFunc.Parameters.Add(new ParameterDefinition("reader", ParameterAttributes.None, WeaverTypes.Import <NetworkReader>()));
readerFunc.Body.InitLocals = true;
RegisterReadFunc(variable, readerFunc);
return(readerFunc);
}
static MethodDefinition GenerateWriterFunc(TypeReference variable)
{
string functionName = "_Write_" + variable.FullName;
// create new writer for this type
MethodDefinition writerFunc = new MethodDefinition(functionName,
MethodAttributes.Public |
MethodAttributes.Static |
MethodAttributes.HideBySig,
WeaverTypes.Import(typeof(void)));
writerFunc.Parameters.Add(new ParameterDefinition("writer", ParameterAttributes.None, WeaverTypes.Import <NetworkWriter>()));
writerFunc.Parameters.Add(new ParameterDefinition("value", ParameterAttributes.None, variable));
writerFunc.Body.InitLocals = true;
RegisterWriteFunc(variable, writerFunc);
return(writerFunc);
}
static bool Weave(string assName, IEnumerable <string> dependencies)
{
using (DefaultAssemblyResolver asmResolver = new DefaultAssemblyResolver())
using (CurrentAssembly = AssemblyDefinition.ReadAssembly(assName, new ReaderParameters {
ReadWrite = true, ReadSymbols = true, AssemblyResolver = asmResolver
}))
{
asmResolver.AddSearchDirectory(Path.GetDirectoryName(assName));
asmResolver.AddSearchDirectory(Helpers.UnityEngineDllDirectoryName());
if (dependencies != null)
{
foreach (string path in dependencies)
{
asmResolver.AddSearchDirectory(path);
}
}
// fix "No writer found for ..." error
// https://github.com/vis2k/Mirror/issues/2579
// -> when restarting Unity, weaver would try to weave a DLL
// again
// -> resulting in two GeneratedNetworkCode classes (see ILSpy)
// -> the second one wouldn't have all the writer types setup
if (ContainsGeneratedCodeClass(CurrentAssembly.MainModule))
{
//Log.Warning($"Weaver: skipping {CurrentAssembly.Name} because already weaved");
return(true);
}
WeaverTypes.SetupTargetTypes(CurrentAssembly);
CreateGeneratedCodeClass();
// WeaverList depends on WeaverTypes setup because it uses Import
WeaveLists = new WeaverLists();
System.Diagnostics.Stopwatch rwstopwatch = System.Diagnostics.Stopwatch.StartNew();
// Need to track modified from ReaderWriterProcessor too because it could find custom read/write functions or create functions for NetworkMessages
bool modified = ReaderWriterProcessor.Process(CurrentAssembly);
rwstopwatch.Stop();
Console.WriteLine($"Find all reader and writers took {rwstopwatch.ElapsedMilliseconds} milliseconds");
ModuleDefinition moduleDefinition = CurrentAssembly.MainModule;
Console.WriteLine($"Script Module: {moduleDefinition.Name}");
modified |= WeaveModule(moduleDefinition);
if (WeavingFailed)
{
return(false);
}
if (modified)
{
PropertySiteProcessor.Process(moduleDefinition);
// add class that holds read/write functions
moduleDefinition.Types.Add(GeneratedCodeClass);
ReaderWriterProcessor.InitializeReaderAndWriters(CurrentAssembly);
// write to outputDir if specified, otherwise perform in-place write
WriterParameters writeParams = new WriterParameters {
WriteSymbols = true
};
CurrentAssembly.Write(writeParams);
}
}
return(true);
}