internal Delegate GetDelegate()
{
_method = CreateDynamicMethod();
_emit = new EmitHelper(Method.GetILGenerator());
Delegate @delegate = CreateDelegate();
return @delegate;
}
protected virtual ReadDataInvoker CreateReadDataMethod(Type type, AMFReader reader, object instance)
{
#if !(MONO) && !(NET_2_0) && !(NET_3_5) && !(SILVERLIGHT)
bool canSkipChecks = _ps.IsSubsetOf(AppDomain.CurrentDomain.PermissionSet);
#else
bool canSkipChecks = SecurityManager.IsGranted(new ReflectionPermission(ReflectionPermissionFlag.MemberAccess));
#endif
DynamicMethod method = new DynamicMethod(string.Empty, typeof(object), new Type[] { typeof(AMFReader), typeof(ClassDefinition) }, this.GetType(), canSkipChecks);
ILGenerator il = method.GetILGenerator();
LocalBuilder instanceLocal = il.DeclareLocal(type);//[0] instance
LocalBuilder typeCodeLocal = il.DeclareLocal(typeof(byte));//[1] uint8 typeCode
LocalBuilder keyLocal = il.DeclareLocal(typeof(string));//[2] string key
LocalBuilder objTmp = il.DeclareLocal(typeof(object));//[3] temp object store
LocalBuilder intTmp1 = il.DeclareLocal(typeof(int));//[4] temp int store, length
LocalBuilder intTmp2 = il.DeclareLocal(typeof(int));//[5] temp int store, index
LocalBuilder objTmp2 = il.DeclareLocal(typeof(object));//[6] temp object store
LocalBuilder typeTmp = il.DeclareLocal(typeof(Type));//[7] temp Type store
EmitHelper emit = new EmitHelper(il);
ConstructorInfo typeConstructor = type.GetConstructor(EmitHelper.AnyVisibilityInstance, null, CallingConventions.HasThis, System.Type.EmptyTypes, null);
MethodInfo miAddReference = typeof(AMFReader).GetMethod("AddReference");
MethodInfo miReadString = typeof(AMFReader).GetMethod("ReadString");
MethodInfo miReadByte = typeof(AMFReader).GetMethod("ReadByte");
emit
//object instance = new object();
.newobj(typeConstructor) //Create the new instance and push the object reference onto the evaluation stack
.stloc_0 //Pop from the top of the evaluation stack and store it in a the local variable list at index 0
//reader.AddReference(instance);
.ldarg_0 //Push the argument indexed at 1 onto the evaluation stack 'reader'
.ldloc_0 //Loads the local variable at index 0 onto the evaluation stack 'instance'
.callvirt(miAddReference) //Arguments are popped from the stack, the method call is performed, return value is pushed onto the stack
//typeCode = 0;
.ldc_i4_0 //Push the integer value of 0 onto the evaluation stack as an int32
.stloc_1 //Pop and store it in a the local variable list at index 1
//string key = null;
.ldnull //Push a null reference onto the evaluation stack
.stloc_2 //Pop and store it in a the local variable list at index 2 'key'
.end()
;
string key = reader.ReadString();
for (byte typeCode = reader.ReadByte(); typeCode != AMF0TypeCode.EndOfObject; typeCode = reader.ReadByte())
{
emit
.ldarg_0
.callvirt(miReadString)
.stloc_2
.ldarg_0
.callvirt(miReadByte)
.stloc_1
.end()
;
object value = reader.ReadData(typeCode);
reader.SetMember(instance, key, value);
MemberInfo[] memberInfos = type.GetMember(key);
if (memberInfos != null && memberInfos.Length > 0)
GeneratePropertySet(emit, typeCode, memberInfos[0]);
else
{
//Log this error (do not throw exception), otherwise our current AMF stream becomes unreliable
log.Warn(__Res.GetString(__Res.Optimizer_Warning));
string msg = __Res.GetString(__Res.Reflection_MemberNotFound, string.Format("{0}.{1}", type.FullName, key));
log.Warn(msg);
//reader.ReadAMF3Data(typeCode);
emit
.ldarg_0 //Push 'reader'
.ldloc_1 //Push 'typeCode'
.callvirt(typeof(AMFReader).GetMethod("ReadData", new Type[] { typeof(byte) }))
.pop
.end()
;
}
key = reader.ReadString();
}
Label labelExit = emit.DefineLabel();
ConstructorInfo exceptionConstructor = typeof(UnexpectedAMF).GetConstructor(EmitHelper.AnyVisibilityInstance, null, CallingConventions.HasThis, Type.EmptyTypes, null);
//key = reader.ReadString();
emit
.ldarg_0 //Push 'reader'
.callvirt(miReadString)
.stloc_2 //Pop 'key'
//typeCode = reader.ReadByte();
.ldarg_0 //Push 'reader'
.callvirt(miReadByte)
.stloc_1 //Pop 'typeCode'
.ldloc_1
.ldc_i4_s(AMF0TypeCode.EndOfObject)
.ceq
.brtrue_s(labelExit)
//if( typeCode != AMF0TypeCode.EndOfObject ) throw new UnexpectedAMF();
.newobj(exceptionConstructor)
.@throw
.end()
;
emit
.MarkLabel(labelExit)
//return instance;
.ldloc_0 //Load the local variable at index 0 onto the evaluation stack
.ret() //Return
;
return (ReadDataInvoker)method.CreateDelegate(typeof(ReadDataInvoker));
}
private void GeneratePropertySet(EmitHelper emit, int typeCode, MemberInfo memberInfo)
{
Type memberType = null;
if (memberInfo.MemberType == MemberTypes.Property)
{
PropertyInfo propertyInfo = memberInfo.DeclaringType.GetProperty(memberInfo.Name);
memberType = propertyInfo.PropertyType;
}
if (memberInfo is FieldInfo)
{
FieldInfo fieldInfo = memberInfo.DeclaringType.GetField(memberInfo.Name);
memberType = fieldInfo.FieldType;
}
if (memberType == null)
throw new ArgumentNullException(memberInfo.Name);
//The primitive types are: Boolean, Byte, SByte, Int16, UInt16, Int32, UInt32, Int64, UInt64, Char, Double, Single
//We handle here Decimal types too
if (memberType.IsPrimitive || memberType == typeof(decimal))
{
TypeCode primitiveTypeCode = Type.GetTypeCode(memberType);
switch (primitiveTypeCode)
{
case TypeCode.Byte:
case TypeCode.Decimal:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Single:
case TypeCode.Double:
{
#region Primitive numeric
Label labelNotNumber = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
//if( typeCode == AMF0TypeCode.Number )
emit
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.Number)
.ceq
.brfalse_s(labelNotNumber)
//instance.{0} = ({1})reader.ReadDouble();
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadDouble"))
.GeneratePrimitiveCast(primitiveTypeCode)
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotNumber)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
//.nop
.end()
;
#endregion Primitive numeric
}
break;
case TypeCode.Boolean:
{
#region Primitive boolean
Label labelNotBoolean = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
//if( typeCode == AMF0TypeCode.Boolean )
emit
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.Boolean)
.ceq
.brfalse_s(labelNotBoolean)
//instance.{0} = ({1})reader.ReadBoolean();
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadBoolean"))
.GeneratePrimitiveCast(primitiveTypeCode)
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotBoolean)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
#endregion Primitive boolean
}
break;
case TypeCode.Char:
{
#region Primitive Char
{
Label labelNotString = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
//if( typeCode == AMF0TypeCode.String )
emit
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.String)
.ceq
.brfalse_s(labelNotString)
//instance.member = reader.ReadString()[0];
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadString"))
.stloc_2
.ldloc_2 //Push 'key'
.brfalse_s(labelNotString) // Branch if 'key' is null
.ldloc_2 //Push strTmp
.ldsfld(typeof(string).GetField("Empty"))
.call(typeof(string).GetMethod("op_Inequality", new Type[] { typeof(string), typeof(string) }))
.brfalse_s(labelNotString)
.ldloc_0 //Push 'instance'
.ldloc_2 //Push 'key'
.ldc_i4_0 //Push char index 0
.callvirt(typeof(string).GetMethod("get_Chars", new Type[] { typeof(Int32) }))
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotString)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
}
#endregion Primitive Char
}
break;
}
return;
}
if (memberType.IsEnum)
{
#region Enum
Label labelNotStringOrNumber = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
Label labelReadDouble = emit.ILGenerator.DefineLabel();
//if( typeCode == AMF0TypeCode.String || typeCode == AMF0TypeCode.Number )
emit
.ldloc_1 //Push 'typeCode'
.brfalse_s(labelReadDouble) //Branch if 0 (AMF0TypeCode.Number)
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.String)
.ceq
.brfalse_s(labelNotStringOrNumber)
//we have a string
.ldloc_0 //Push 'instance'
.ldtoken(memberType)
.call(typeof(Type).GetMethod("GetTypeFromHandle", new Type[] { typeof(RuntimeTypeHandle) }))
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadString"))
.ldc_i4_1
.call(typeof(Enum).GetMethod("Parse", new Type[] { typeof(Type), typeof(string), typeof(bool) }))
.unbox_any(memberType)
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelReadDouble)
//we have a number
.ldloc_0 //Push 'instance'
.ldtoken(memberType)
.call(typeof(Type).GetMethod("GetTypeFromHandle"))
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadDouble"))
.conv_i4
.call(typeof(Enum).GetMethod("ToObject", new Type[] { typeof(Type), typeof(Int32) }))
.unbox_any(memberType)
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotStringOrNumber)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
return;
#endregion Enum
}
if (memberType == typeof(DateTime))
{
#region DateTime
Label labelNotDate = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
//if( typeCode == AMF0TypeCode.DateTime )
emit
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.DateTime)
.ceq
.brfalse_s(labelNotDate)
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadDateTime"))
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotDate)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
return;
#endregion DateTime
}
if (memberType == typeof(string))
{
#region String
Label labelNotStringOrNull = emit.ILGenerator.DefineLabel();
Label labelSetNull = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
Label labelReadString = emit.ILGenerator.DefineLabel();
Label labelReadLongString = emit.ILGenerator.DefineLabel();
emit
//if( typeCode == AMF0TypeCode.String || typeCode == AMF0TypeCode.LongString || typeCode == AMF0TypeCode.Null || typeCode == AMF0TypeCode.Undefined )
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.String)
.ceq
.brtrue_s(labelReadString)
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.LongString)
.ceq
.brtrue_s(labelReadLongString)
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.Null)
.ceq
.brtrue_s(labelSetNull)
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.Undefined)
.ceq
.brtrue_s(labelSetNull)
.br_s(labelNotStringOrNull)
.MarkLabel(labelReadString)
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadString"))
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelReadLongString)
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadLongString"))
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelSetNull)
.ldloc_0 //Push 'instance'
.ldc_i4_0
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotStringOrNull)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
return;
#endregion String
}
if (memberType == typeof(Guid))
{
#region Guid
Label labelNotString = emit.ILGenerator.DefineLabel();
Label labelExit = emit.ILGenerator.DefineLabel();
emit
//if( typeCode == AMF0TypeCode.String )
.ldloc_1 //Push 'typeCode'
.ldc_i4(AMF0TypeCode.String)
.ceq
.brfalse_s(labelNotString)
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.callvirt(typeof(AMFReader).GetMethod("ReadString"))
.newobj(typeof(Guid).GetConstructor(EmitHelper.AnyVisibilityInstance, null, CallingConventions.HasThis, new Type[] { typeof(string) }, null))
.GenerateSetMember(memberInfo)
.br_s(labelExit)
.MarkLabel(labelNotString)
.GenerateThrowUnexpectedAMFException(memberInfo)
.MarkLabel(labelExit)
.end()
;
return;
#endregion Guid
}
if (memberType.IsValueType)
{
//structs are not handled
throw new FluorineException("Struct value types are not supported");
}
//instance.member = (type)TypeHelper.ChangeType(reader.ReadData(typeCode), typeof(member));
emit
.ldloc_0 //Push 'instance'
.ldarg_0 //Push 'reader'
.ldloc_1 //Push 'typeCode'
.callvirt(typeof(AMFReader).GetMethod("ReadData", new Type[] { typeof(byte) }))
.ldtoken(memberType)
.call(typeof(Type).GetMethod("GetTypeFromHandle", new Type[] { typeof(RuntimeTypeHandle) }))
.call(typeof(TypeHelper).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }))
.CastFromObject(memberType)
.GenerateSetMember(memberInfo)
.end()
;
}
