public void EmitDeserialize(Emit emiter, Local value)
{
var elementType = value.LocalType.GetElementType();
//value = new Type[100];
emiter.LoadConstant(100);
emiter.NewArray(elementType);
emiter.StoreLocal(value);
var loop = emiter.DefineLabel();
var loopCheck = emiter.DefineLabel();
using (var ex = emiter.DeclareLocal <Exception>("_ex"))
using (var element = emiter.DeclareLocal(elementType, "element"))
using (var i = emiter.DeclareLocal <int>("i"))
{
emiter.MarkLabel(loop);
var eb = emiter.BeginExceptionBlock();
if (_compiler != null)
{
_compiler.EmitDeserialize(emiter, element);
}
else if (_serializer != null)
{
emiter.CallDeserializer(_serializer, element);
}
else
{
emiter.CallDeserializerForType(elementType, element);
}
var cb = emiter.BeginCatchBlock <Exception>(eb);
emiter.StoreLocal(ex);
emiter.EndCatchBlock(cb);
emiter.EndExceptionBlock(eb);
// value[i] = element
emiter.LoadLocal(value);
emiter.LoadLocal(i);
emiter.LoadLocal(element);
emiter.StoreElement(elementType);
// ++i
emiter.LoadLocal(i);
emiter.LoadConstant(1);
emiter.Add();
emiter.StoreLocal(i);
// i < length
emiter.MarkLabel(loopCheck);
emiter.LoadLocal(i);
emiter.LoadConstant(100);
emiter.BranchIfLess(loop);
}
}
public void EmitDeserialize(Emit emiter, Local value)
{
var elementType = value.LocalType.GetElementType();
var emptyArray = emiter.DefineLabel();
var end = emiter.DefineLabel();
using (var length = emiter.DeclareLocal <int>("length"))
{
emiter.CallDeserializerForType(length.LocalType, length);
// if(length < 1) {
// value = Array.Empty<>()
// return
// }
emiter.LoadLocal(length);
emiter.LoadConstant(1);
emiter.BranchIfLess(emptyArray);
// value = new [length]
emiter.LoadLocal(length);
emiter.NewArray(elementType);
emiter.StoreLocal(value);
var loop = emiter.DefineLabel();
var loopCheck = emiter.DefineLabel();
// Little optimization for byte arrays
if (elementType == typeof(byte))
{
// value = reader.ReadBytes(length);
emiter.LoadArgument(1);
emiter.LoadLocal(length);
emiter.CallVirtual(typeof(BinaryReader).GetMethod(nameof(BinaryReader.ReadBytes)));
emiter.StoreLocal(value);
emiter.Branch(end);
}
else
{
using (var element = emiter.DeclareLocal(elementType, "element"))
using (var i = emiter.DeclareLocal <int>("i"))
{
emiter.MarkLabel(loop);
if (_compiler != null)
{
_compiler.EmitDeserialize(emiter, element);
}
else if (_serializer != null)
{
emiter.CallDeserializer(_serializer, element);
}
else
{
emiter.CallDeserializerForType(elementType, element);
}
// value[i] = element
emiter.LoadLocal(value);
emiter.LoadLocal(i);
emiter.LoadLocal(element);
emiter.StoreElement(elementType);
// ++i
emiter.LoadLocal(i);
emiter.LoadConstant(1);
emiter.Add();
emiter.StoreLocal(i);
// i < length
emiter.MarkLabel(loopCheck);
emiter.LoadLocal(i);
emiter.LoadLocal(length);
emiter.BranchIfLess(loop);
}
}
emiter.Branch(end);
}
// value = Array.Empty<>()
emiter.MarkLabel(emptyArray);
emiter.Call(typeof(Array)
.GetMethod(nameof(Array.Empty))
.GetGenericMethodDefinition()
.MakeGenericMethod(elementType));
emiter.StoreLocal(value);
emiter.MarkLabel(end);
}