private static void GenerateInvokeCallbacksAndExecute(WriterGenerationContext context, bool generatePreSerializationCallback, bool generatePostSerializationCallback, Variable valueLocal, Type type, Action <WriterGenerationContext> bodyBuilder)
{
if (generatePreSerializationCallback || generatePostSerializationCallback)
{
context.Generator.BeginExceptionBlock();
}
if (generatePreSerializationCallback)
{
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, Action <object> >(x => x.preSerializationCallback);
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call <Action <object> >(x => x.Invoke(null));
}
bodyBuilder(context);
if (generatePreSerializationCallback || generatePostSerializationCallback)
{
context.Generator.BeginFinallyBlock();
}
if (generatePostSerializationCallback)
{
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, Action <object> >(x => x.postSerializationCallback);
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call <Action <object> >(x => x.Invoke(null));
}
if (generatePreSerializationCallback || generatePostSerializationCallback)
{
context.Generator.EndExceptionBlock();
}
}
private void GenerateAddCallbackToInvokeList(WriterGenerationContext context, LocalBuilder valueLocal, Type actualType, Type attributeType)
{
var actionCtor = typeof(Action).GetConstructor(new[] { typeof(object), typeof(IntPtr) });
var addToListMethod = Helpers.GetMethodInfo <List <Action> >(x => x.Add(null));
var methodsWithAttribute = Helpers.GetMethodsWithAttribute(attributeType, actualType).ToList();
var count = methodsWithAttribute.Count;
if (count > 0)
{
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, List <Action> >(x => x.postSerializationHooks);
}
for (var i = 1; i < count; i++)
{
context.Generator.Emit(OpCodes.Dup);
}
foreach (var method in methodsWithAttribute)
{
// let's make the delegate
if (method.IsStatic)
{
context.Generator.Emit(OpCodes.Ldnull);
}
else
{
context.Generator.PushLocalValueOntoStack(valueLocal);
}
context.Generator.Emit(OpCodes.Ldftn, method);
context.Generator.Emit(OpCodes.Newobj, actionCtor);
// and add it to invoke list
context.Generator.Emit(OpCodes.Call, addToListMethod);
}
}
private static void GenerateWriteMultidimensionalArray(WriterGenerationContext context, Variable arrayLocal, Type actualType, int rank)
{
var elementType = actualType.GetElementType();
var indexLocals = new LocalBuilder[rank];
var lengthLocals = new LocalBuilder[rank];
for (var i = 0; i < rank; i++)
{
indexLocals[i] = context.Generator.DeclareLocal(typeof(int));
lengthLocals[i] = context.Generator.DeclareLocal(typeof(int));
context.Generator.PushIntegerOntoStack(0);
context.Generator.StoreLocalValueFromStack(indexLocals[i]);
context.Generator.PushVariableOntoStack(arrayLocal);
context.Generator.PushIntegerOntoStack(i);
context.Generator.Call <Array>(x => x.GetLength(0));
context.Generator.StoreLocalValueFromStack(lengthLocals[i]);
}
// writing elements
var currentElementLocal = context.Generator.DeclareLocal(elementType);
var currentElementVariable = new Variable(currentElementLocal);
GenerateArrayWriteLoop(context, 0, rank, indexLocals, lengthLocals, arrayLocal, currentElementVariable, actualType, elementType);
}
private void GenerateDynamicCode(WriterGenerationContext context, Type typeToGenerate)
{
var objectToSerialize = new Variable(1, typeToGenerate);
// preserialization callbacks
var exceptionBlockNeeded = Helpers.GetMethodsWithAttribute(typeof(PostSerializationAttribute), typeToGenerate).Any() ||
Helpers.GetMethodsWithAttribute(typeof(LatePostSerializationAttribute), typeToGenerate).Any();
if (exceptionBlockNeeded)
{
context.Generator.BeginExceptionBlock();
}
GenerateInvokeCallback(context, objectToSerialize, typeToGenerate, typeof(PreSerializationAttribute));
if (!GenerateSpecialWrite(context, typeToGenerate, objectToSerialize, !treatCollectionAsUserObject))
{
GenerateWriteFields(context, objectToSerialize, typeToGenerate);
}
if (exceptionBlockNeeded)
{
context.Generator.BeginFinallyBlock();
}
if (exceptionBlockNeeded)
{
context.Generator.EndExceptionBlock();
}
context.Generator.Emit(OpCodes.Ret);
}
private static void GenerateWriteArray(WriterGenerationContext context, Variable arrayLocal, Type actualType)
{
var rank = actualType.GetArrayRank();
if (rank != 1)
{
GenerateWriteMultidimensionalArray(context, arrayLocal, actualType, rank);
return;
}
var elementType = actualType.GetElementType();
var currentElementLocal = context.Generator.DeclareLocal(elementType);
var lengthLocal = context.Generator.DeclareLocal(typeof(int));
var currentElementVariable = new Variable(currentElementLocal);
context.Generator.PushVariableOntoStack(arrayLocal);
context.Generator.Emit(OpCodes.Ldlen);
context.Generator.StoreLocalValueFromStack(lengthLocal);
GeneratorHelper.GenerateLoop(context, lengthLocal, c =>
{
context.Generator.PushVariableOntoStack(arrayLocal);
context.Generator.PushLocalValueOntoStack(c);
context.Generator.Emit(OpCodes.Ldelem, elementType);
context.Generator.StoreLocalValueFromStack(currentElementLocal);
GenerateWriteField(context, currentElementVariable, elementType);
});
}
internal static bool GenerateSpecialWrite(WriterGenerationContext context, Type actualType, Variable value, bool checkForCollections)
{
if (actualType.IsValueType)
{
// value type encountered here means it is in fact boxed value type
// according to protocol it is written as it would be written inlined
GenerateWriteValue(context, value, actualType);
return(true);
}
if (actualType.IsArray)
{
GenerateWriteArray(context, value, actualType);
return(true);
}
if (typeof(MulticastDelegate).IsAssignableFrom(actualType))
{
GenerateWriteDelegate(context, value);
return(true);
}
if (checkForCollections)
{
CollectionMetaToken collectionToken;
if (CollectionMetaToken.TryGetCollectionMetaToken(actualType, out collectionToken))
{
GenerateWriteEnumerable(context, value, collectionToken);
return(true);
}
}
return(false);
}
protected override bool InnerGenerate(WriterGenerationContext context)
{
var value = new Variable(1);
WriteMethodGenerator.GenerateWriteDeferredReference(context, value, type);
return(true);
}
protected override bool InnerGenerate(WriterGenerationContext context)
{
Variable value;
if (type.IsValueType)
{
var valueLocal = context.Generator.DeclareLocal(type);
context.Generator.Emit(OpCodes.Ldarg_1);
context.Generator.Emit(OpCodes.Unbox_Any, type);
context.Generator.StoreLocalValueFromStack(valueLocal);
value = new Variable(valueLocal);
}
else
{
value = new Variable(1);
}
var objectForSurrogatesIndex = objectsForSurrogates == null ? -1 : objectsForSurrogates.FindMatchingIndex(type);
context.PushPrimitiveWriterOntoStack();
context.Generator.PushIntegerOntoStack(objectForSurrogatesIndex != -1 ? 1 : 0);
context.Generator.Call <PrimitiveWriter>(x => x.Write(false));
if (objectForSurrogatesIndex != -1)
{
context.PushObjectWriterOntoStack();
context.Generator.Emit(OpCodes.Dup);
context.Generator.PushFieldValueOntoStack <ObjectWriter, SwapList>(x => x.objectsForSurrogates);
context.Generator.PushIntegerOntoStack(objectForSurrogatesIndex);
context.Generator.Call <SwapList>(x => x.GetByIndex(0));
var delegateType = typeof(Func <,>).MakeGenericType(type, typeof(object));
context.Generator.Emit(OpCodes.Castclass, delegateType);
context.Generator.Emit(OpCodes.Ldarg_1);
context.Generator.Emit(OpCodes.Call, delegateType.GetMethod("Invoke"));
// here should be a primitive writer on a stack
context.Generator.Call <object>(x => x.GetType());
context.Generator.Call <ObjectWriter>(x => x.TouchAndWriteTypeId(typeof(void)));
context.Generator.Emit(OpCodes.Pop);
}
if (WriteMethodGenerator.GenerateTryWriteObjectInline(context, generatePreSerializationCallback, generatePostSerializationCallback, value, type))
{
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, HashSet <int> >(x => x.objectsWrittenInline);
context.Generator.Emit(OpCodes.Ldarg_2); // reference identifier
context.Generator.Call <HashSet <int> >(x => x.Add(0));
context.Generator.Emit(OpCodes.Pop);
}
return(true);
}
private static void GenerateWriteValue(WriterGenerationContext context, Variable valueLocal, Type formalType)
{
ObjectWriter.CheckLegality(formalType);
if (formalType.IsEnum)
{
formalType = Enum.GetUnderlyingType(formalType);
}
var writeMethod = typeof(PrimitiveWriter).GetMethod("Write", new[] { formalType });
// if this method is null, then it is a non-primitive (i.e. custom) struct
if (writeMethod != null)
{
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Call, writeMethod);
return;
}
var nullableUnderlyingType = Nullable.GetUnderlyingType(formalType);
if (nullableUnderlyingType != null)
{
var hasValueLabel = context.Generator.DefineLabel();
var finishLabel = context.Generator.DefineLabel();
var underlyingValueLocal = context.Generator.DeclareLocal(nullableUnderlyingType);
var underlyingVariable = new Variable(underlyingValueLocal);
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableAddressOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Call, formalType.GetProperty("HasValue").GetGetMethod());
context.Generator.Emit(OpCodes.Brtrue_S, hasValueLabel);
context.Generator.PushIntegerOntoStack(0);
context.Generator.Call <PrimitiveWriter>(x => x.Write(false));
context.Generator.Emit(OpCodes.Br_S, finishLabel);
context.Generator.MarkLabel(hasValueLabel);
context.Generator.PushIntegerOntoStack(1);
context.Generator.Call <PrimitiveWriter>(x => x.Write(false));
context.Generator.PushVariableAddressOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Call, formalType.GetProperty("Value").GetGetMethod());
context.Generator.StoreLocalValueFromStack(underlyingValueLocal);
GenerateWriteValue(context, underlyingVariable, nullableUnderlyingType);
context.Generator.MarkLabel(finishLabel);
return;
}
GenerateWriteFields(context, valueLocal, formalType);
}
private void GenerateInvokeCallback(WriterGenerationContext context, Variable value, Type actualType, Type attributeType)
{
var methodsWithAttribute = Helpers.GetMethodsWithAttribute(attributeType, actualType);
foreach (var method in methodsWithAttribute)
{
if (!method.IsStatic)
{
context.Generator.PushVariableOntoStack(value);
}
context.Generator.Emit(method.IsVirtual ? OpCodes.Callvirt : OpCodes.Call, method);
}
}
private static void GenerateWriteDelegate(WriterGenerationContext context, Variable valueLocal)
{
var array = context.Generator.DeclareLocal(typeof(Delegate[]));
var loopLength = context.Generator.DeclareLocal(typeof(int));
var element = context.Generator.DeclareLocal(typeof(Delegate));
var delegateTargetLocal = context.Generator.DeclareLocal(typeof(object));
var delegateTargetVariable = new Variable(delegateTargetLocal);
context.PushPrimitiveWriterOntoStack();
context.PushObjectWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call <ObjectWriter>(x => x.GetDelegatesWithNonTransientTargets(null));
context.Generator.Emit(OpCodes.Castclass, typeof(Delegate[]));
context.Generator.Emit(OpCodes.Dup);
context.Generator.StoreLocalValueFromStack(array);
// array refrence should be on the top of stack here
context.Generator.Emit(OpCodes.Ldlen);
context.Generator.Emit(OpCodes.Dup);
context.Generator.StoreLocalValueFromStack(loopLength);
// primitive writer should be on the stack
// array length should be on the stack
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
GeneratorHelper.GenerateLoop(context, loopLength, c =>
{
context.Generator.PushLocalValueOntoStack(array);
context.Generator.PushLocalValueOntoStack(c);
context.Generator.Emit(OpCodes.Ldelem, element.LocalType);
context.Generator.Emit(OpCodes.Dup);
context.Generator.StoreLocalValueFromStack(element);
// element reference should be on the stack
context.Generator.PushPropertyValueOntoStack <MulticastDelegate, object>(x => x.Target);
context.Generator.StoreLocalValueFromStack(delegateTargetLocal);
GenerateWriteDeferredReference(context, delegateTargetVariable, typeof(object));
context.PushObjectWriterOntoStack();
context.Generator.PushPropertyValueOntoStack <ObjectWriter, IdentifiedElementsDictionary <MethodDescriptor> >(x => x.Methods);
context.Generator.PushLocalValueOntoStack(element);
context.Generator.PushPropertyValueOntoStack <MulticastDelegate, MethodInfo>(x => x.Method);
context.Generator.Emit(OpCodes.Newobj, Helpers.GetConstructorInfo <MethodDescriptor>(typeof(MethodInfo)));
context.Generator.Call <IdentifiedElementsDictionary <MethodDescriptor> >(x => x.TouchAndWriteId(null));
context.Generator.Emit(OpCodes.Pop);
});
}
internal static bool GenerateTryWriteObjectInline(WriterGenerationContext context, bool generatePreSerializationCallback, bool generatePostSerializationCallback, Variable valueLocal, Type actualType)
{
if (actualType.IsArray)
{
var rank = actualType.GetArrayRank();
// write rank
context.PushPrimitiveWriterOntoStack();
context.Generator.PushIntegerOntoStack(rank);
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
if (rank == 1)
{
// write length
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Castclass, actualType);
context.Generator.Emit(OpCodes.Ldlen);
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
}
else
{
// write lengths in loop
for (var i = 0; i < rank; i++)
{
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.PushIntegerOntoStack(i);
context.Generator.Call <Array>(x => x.GetLength(0));
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
}
}
return(false);
}
if (actualType == typeof(string))
{
GenerateInvokeCallbacksAndExecute(context, generatePreSerializationCallback, generatePostSerializationCallback, valueLocal, actualType, c =>
{
c.PushPrimitiveWriterOntoStack();
c.Generator.PushVariableOntoStack(valueLocal);
c.Generator.Call <PrimitiveWriter>(x => x.Write((string)null));
});
return(true);
}
return(GenerateSpecialWrite(context, actualType, valueLocal, false));
}
protected override MethodInfo GenerateInner()
{
var dynamicMethod = new DynamicMethod(name, returnType, parameterTypes, typeof(Serializer), true);
var generator = dynamicMethod.GetILGenerator();
var context = new WriterGenerationContext(generator, disableStamping, treatCollectionAsUserObject, objectWriterArgument);
if (!InnerGenerate(context))
{
return(null);
}
context.Generator.Emit(OpCodes.Ret);
#if DEBUG_FORMAT
GeneratorHelper.DumpToLibrary <T>(context, x => InnerGenerate((WriterGenerationContext)x), name);
#endif
return(dynamicMethod);
}
private static void GenerateWriteField(WriterGenerationContext context, Variable valueLocal, Type formalType)
{
switch (Helpers.GetSerializationType(formalType))
{
case SerializationType.Transient:
// just omit it
return;
case SerializationType.Value:
GenerateWriteValue(context, valueLocal, formalType);
break;
case SerializationType.Reference:
GenerateWriteDeferredReference(context, valueLocal, formalType);
break;
}
}
internal static void GenerateWriteDeferredReference(WriterGenerationContext context, Variable valueLocal, Type formalType)
{
var finish = context.Generator.DefineLabel();
var isNotNull = context.Generator.DefineLabel();
var isNotTransient = context.Generator.DefineLabel();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Brtrue_S, isNotNull);
context.PushNullReferenceOnStack();
context.Generator.Emit(OpCodes.Br, finish);
context.Generator.MarkLabel(isNotNull);
var formalTypeIsActualType = (formalType.Attributes & TypeAttributes.Sealed) != 0;
if (!formalTypeIsActualType)
{
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call(() => Helpers.IsTransient((object)null));
context.Generator.Emit(OpCodes.Brfalse_S, isNotTransient);
context.PushNullReferenceOnStack();
context.Generator.Emit(OpCodes.Br, finish);
context.Generator.MarkLabel(isNotTransient);
context.PushObjectWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call <ObjectWriter>(x => x.WriteDeferredReference(null));
}
else
{
if (Helpers.IsTransient(formalType))
{
context.PushNullReferenceOnStack();
}
else
{
context.PushObjectWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Call <ObjectWriter>(x => x.WriteDeferredReference(null));
}
}
context.Generator.MarkLabel(finish);
}
private static void GenerateWriteFields(WriterGenerationContext context, Variable value, Type actualType)
{
var fields = StampHelpers.GetFieldsInSerializationOrder(actualType);
foreach (var field in fields)
{
var fieldValueLocal = context.Generator.DeclareLocal(field.FieldType);
var fieldValue = new Variable(fieldValueLocal);
context.Generator.PushVariableOntoStack(value);
if (!actualType.IsValueType)
{
context.Generator.Emit(OpCodes.Castclass, actualType);
}
context.Generator.Emit(OpCodes.Ldfld, field);
context.Generator.StoreLocalValueFromStack(fieldValueLocal);
GenerateWriteField(context, fieldValue, field.FieldType);
}
}
private static void GenerateArrayWriteLoop(WriterGenerationContext context, int currentDimension, int rank, LocalBuilder[] indexLocals, LocalBuilder[] lengthLocals, Variable arrayLocal, Variable currentElementVariable, Type arrayType, Type elementType)
{
GeneratorHelper.GenerateLoop(context, lengthLocals[currentDimension], indexLocals[currentDimension], () =>
{
if (currentDimension == rank - 1)
{
context.Generator.PushVariableOntoStack(arrayLocal);
for (var i = 0; i < rank; i++)
{
context.Generator.PushLocalValueOntoStack(indexLocals[i]);
}
// jeśli to nie zadziała to użyć:
context.Generator.Emit(OpCodes.Call, arrayType.GetMethod("Get"));
context.Generator.StoreVariableValueFromStack(currentElementVariable);
GenerateWriteField(context, currentElementVariable, elementType);
}
else
{
GenerateArrayWriteLoop(context, currentDimension + 1, rank, indexLocals, lengthLocals, arrayLocal, currentElementVariable, arrayType, elementType);
}
});
}
protected override bool InnerGenerate(WriterGenerationContext context)
{
var surrogateId = surrogatesForObjects.FindMatchingIndex(type);
if (surrogateId == -1)
{
return(false);
}
var objVariable = new Variable(1);
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, SwapList>(x => x.surrogatesForObjects);
context.Generator.PushIntegerOntoStack(surrogateId);
context.Generator.Call <SwapList>(x => x.GetByIndex(0));
// call surrogate factory to obtain surrogate object
var delegateType = typeof(Func <,>).MakeGenericType(type, typeof(object));
context.Generator.Emit(OpCodes.Castclass, delegateType);
context.Generator.PushVariableOntoStack(objVariable);
if (type.IsValueType)
{
context.Generator.Emit(OpCodes.Unbox_Any, type);
}
context.Generator.Emit(OpCodes.Call, delegateType.GetMethod("Invoke"));
context.Generator.StoreVariableValueFromStack(objVariable);
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, ObjectIdentifier>(x => x.identifier);
context.Generator.PushVariableOntoStack(objVariable); // object reference
context.Generator.Emit(OpCodes.Ldarg_2); // reference id
context.Generator.Call <ObjectIdentifier>(x => x.SetIdentifierForObject(null, 0));
context.Generator.PushVariableOntoStack(objVariable);
return(true);
}
protected override MethodInfo GenerateInner()
{
DynamicMethod dynamicMethod = null;
if (!type.IsArray)
{
dynamicMethod = new DynamicMethod(string.Format("Write_{0}", type.Name), returnType, parameterTypes, type, true);
}
else
{
var methodNo = Interlocked.Increment(ref WriteArrayMethodCounter);
dynamicMethod = new DynamicMethod(string.Format("WriteArray{0}_{1}", methodNo, type.Name), returnType, parameterTypes, true);
}
var generator = dynamicMethod.GetILGenerator();
var context = new WriterGenerationContext(generator, false, treatCollectionAsUserObject, OpCodes.Ldarg_0);
#if DEBUG_FORMAT
GeneratorHelper.DumpToLibrary <WriteMethodDelegate>(context, c => GenerateDynamicCode((WriterGenerationContext)c, type), type.Name);
#endif
GenerateDynamicCode(context, type);
return(dynamicMethod);
}
protected abstract bool InnerGenerate(WriterGenerationContext context);
protected override bool InnerGenerate(WriterGenerationContext context)
{
var result = false;
var methods = Helpers.GetMethodsWithAttribute(typeof(PostSerializationAttribute), type).ToArray();
foreach (var method in methods)
{
if (!method.IsStatic)
{
context.Generator.Emit(OpCodes.Ldarg_1);
context.Generator.Emit(OpCodes.Castclass, method.ReflectedType);
}
if (method.IsVirtual)
{
context.Generator.Emit(OpCodes.Callvirt, method);
}
else
{
context.Generator.Emit(OpCodes.Call, method);
}
result = true;
}
methods = Helpers.GetMethodsWithAttribute(typeof(LatePostSerializationAttribute), type).ToArray();
foreach (var method in methods)
{
context.PushObjectWriterOntoStack();
context.Generator.PushFieldValueOntoStack <ObjectWriter, List <Action> >(x => x.postSerializationHooks);
context.Generator.PushTypeOntoStack(typeof(Action));
if (method.IsStatic)
{
context.Generator.Emit(OpCodes.Ldnull);
}
else
{
context.Generator.Emit(OpCodes.Ldarg_1);
context.Generator.Emit(OpCodes.Castclass, method.ReflectedType);
}
context.Generator.Emit(OpCodes.Ldtoken, method);
if (method.DeclaringType.IsGenericType)
{
context.Generator.Emit(OpCodes.Ldtoken, method.DeclaringType);
context.Generator.Emit(OpCodes.Call, Helpers.GetMethodInfo <object, MethodBase>(x => MethodBase.GetMethodFromHandle(new RuntimeMethodHandle(), new RuntimeTypeHandle())));
}
else
{
context.Generator.Emit(OpCodes.Call, Helpers.GetMethodInfo <object, MethodBase>(x => MethodBase.GetMethodFromHandle(new RuntimeMethodHandle())));
}
context.Generator.Emit(OpCodes.Castclass, typeof(MethodInfo));
context.Generator.Emit(OpCodes.Call, Helpers.GetMethodInfo <object, Delegate>(x => Delegate.CreateDelegate(null, null, method)));
context.Generator.Emit(OpCodes.Castclass, typeof(Action));
context.Generator.Emit(OpCodes.Call, Helpers.GetMethodInfo <List <Action> >(x => x.Add(null)));
result = true;
}
return(result);
}
private static void GenerateWriteEnumerable(WriterGenerationContext context, Variable valueLocal, CollectionMetaToken token)
{
var genericTypes = new[] { token.FormalElementType };
var enumerableType = token.IsGeneric ? typeof(IEnumerable <>).MakeGenericType(genericTypes) : typeof(IEnumerable);
var enumeratorType = token.IsGeneric ? typeof(IEnumerator <>).MakeGenericType(genericTypes) : typeof(IEnumerator);
var iteratorLocal = context.Generator.DeclareLocal(enumeratorType);
var currentElementLocal = context.Generator.DeclareLocal(token.FormalElementType);
var elementVariable = new Variable(currentElementLocal);
var loopBegin = context.Generator.DefineLabel();
var finish = context.Generator.DefineLabel();
context.PushPrimitiveWriterOntoStack();
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(token.CountMethod.IsStatic ? OpCodes.Call : OpCodes.Callvirt, token.CountMethod);
context.Generator.Call <PrimitiveWriter>(x => x.Write(0));
var getEnumeratorMethod = enumerableType.GetMethod("GetEnumerator");
context.Generator.PushVariableOntoStack(valueLocal);
context.Generator.Emit(OpCodes.Callvirt, getEnumeratorMethod);
context.Generator.StoreLocalValueFromStack(iteratorLocal);
context.Generator.MarkLabel(loopBegin);
context.Generator.PushLocalValueOntoStack(iteratorLocal);
context.Generator.Callvirt <IEnumerator>(x => x.MoveNext());
context.Generator.Emit(OpCodes.Brfalse, finish);
context.Generator.PushLocalValueOntoStack(iteratorLocal);
context.Generator.Emit(OpCodes.Callvirt, enumeratorType.GetProperty("Current").GetGetMethod());
if (token.IsDictionary)
{
var elementKeyLocal = context.Generator.DeclareLocal(token.FormalKeyType);
var elementValueLocal = context.Generator.DeclareLocal(token.FormalValueType);
var keyVariable = new Variable(elementKeyLocal);
var valueVariable = new Variable(elementValueLocal);
var actualElementType = token.IsGeneric ? token.FormalElementType : typeof(DictionaryEntry);
var keyValuePairLocal = context.Generator.DeclareLocal(actualElementType);
if (actualElementType.IsValueType)
{
if (!token.IsGeneric)
{
context.Generator.Emit(OpCodes.Unbox_Any, actualElementType);
}
context.Generator.StoreLocalValueFromStack(keyValuePairLocal);
context.Generator.PushLocalAddressOntoStack(keyValuePairLocal);
}
context.Generator.Emit(OpCodes.Dup);
context.Generator.Emit(OpCodes.Call, actualElementType.GetProperty("Key").GetGetMethod());
context.Generator.StoreLocalValueFromStack(elementKeyLocal);
GenerateWriteField(context, keyVariable, token.FormalKeyType);
context.Generator.Emit(OpCodes.Call, actualElementType.GetProperty("Value").GetGetMethod());
context.Generator.StoreLocalValueFromStack(elementValueLocal);
GenerateWriteField(context, valueVariable, token.FormalValueType);
}
else
{
context.Generator.StoreLocalValueFromStack(currentElementLocal);
GenerateWriteField(context, elementVariable, token.FormalElementType);
}
context.Generator.Emit(OpCodes.Br, loopBegin);
context.Generator.MarkLabel(finish);
}