private void WriteFieldHandler(
Compiler.CompilerContext ctx, Compiler.Local loc,
Compiler.CodeLabel handler, Compiler.CodeLabel @continue, IProtoSerializer serializer)
{
ctx.MarkLabel(handler);
Type serType = serializer.ExpectedType;
if (serType == ExpectedType)
{
// emit create if null
Helpers.DebugAssert(!loc.IsNullRef());
if (!ExpectedType.IsValueType && CanCreateInstance)
{
Compiler.CodeLabel afterIf = ctx.DefineLabel();
Compiler.CodeLabel ifContent = ctx.DefineLabel();
// if != null && of correct type
ctx.LoadValue(loc);
ctx.BranchIfFalse(ifContent, false);
ctx.LoadValue(loc);
ctx.TryCast(ExpectedType);
ctx.BranchIfFalse(ifContent, false);
ctx.Branch(afterIf, false);
{
ctx.MarkLabel(ifContent);
((IProtoTypeSerializer)this).EmitCreateInstance(ctx);
if (_callbacks != null)
{
EmitInvokeCallback(ctx, _callbacks.BeforeDeserialize, true, null, ExpectedType);
}
ctx.StoreValue(loc);
}
ctx.MarkLabel(afterIf);
}
serializer.EmitRead(ctx, loc);
}
else
{
ctx.LoadValue(loc);
if (ExpectedType.IsValueType || !serializer.EmitReadReturnsValue)
{
ctx.Cast(serType);
}
else
{
ctx.TryCast(serType); // default value can be another inheritance branch
}
serializer.EmitRead(ctx, null);
}
if (serializer.EmitReadReturnsValue)
{ // update the variable
ctx.StoreValue(loc);
}
ctx.Branch(@continue, false); // "continue"
}
private void EmitCallbackIfNeeded(Compiler.CompilerContext ctx, Compiler.Local valueFrom, TypeModel.CallbackType callbackType)
{
Helpers.DebugAssert(!valueFrom.IsNullRef());
if (_isRootType && ((IProtoTypeSerializer)this).HasCallbacks(callbackType))
{
((IProtoTypeSerializer)this).EmitCallback(ctx, valueFrom, callbackType);
}
}
private void EmitCreateIfNull(Compiler.CompilerContext ctx, Compiler.Local storage)
{
Helpers.DebugAssert(!storage.IsNullRef());
if (!ExpectedType.IsValueType && CanCreateInstance)
{
Compiler.CodeLabel afterNullCheck = ctx.DefineLabel();
ctx.LoadValue(storage);
ctx.BranchIfTrue(afterNullCheck, false);
((IProtoTypeSerializer)this).EmitCreateInstance(ctx);
if (_callbacks != null)
{
EmitInvokeCallback(ctx, _callbacks.BeforeDeserialize, true, null, ExpectedType);
}
ctx.StoreValue(storage);
ctx.MarkLabel(afterNullCheck);
}
}
protected override void EmitWrite(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (ctx.StartDebugBlockAuto(this))
{
Compiler.CodeLabel done = ctx.DefineLabel();
Compiler.CodeLabel onCancel = ctx.DefineLabel();
if (valueFrom.IsNullRef())
{
ctx.CopyValue(); // on the stack
Compiler.CodeLabel needToPop = ctx.DefineLabel();
EmitBranchIfDefaultValue(ctx, needToPop);
// if != defaultValue
{
Tail.EmitWrite(ctx, null);
ctx.Branch(done, true);
}
// else
{
ctx.MarkLabel(needToPop);
ctx.DiscardValue();
// onCancel
}
}
else
{
ctx.LoadValue(valueFrom); // variable/parameter
EmitBranchIfDefaultValue(ctx, onCancel);
// if != defaultValue
{
Tail.EmitWrite(ctx, valueFrom);
ctx.Branch(done, true);
}
// else
// onCancel
}
ctx.MarkLabel(onCancel);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod(nameof(ProtoWriter.WriteFieldHeaderCancelBegin)));
ctx.MarkLabel(done);
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (ctx.StartDebugBlockAuto(this, _property.Name))
{
var g = ctx.G;
bool canSet;
SanityCheck(ctx.Model, _property, Tail, out canSet, ctx.NonPublic, ctx.AllowInternal(_property), true);
using (Compiler.Local loc = ctx.GetLocalWithValueForEmitRead(this, valueFrom))
using (Compiler.Local oldVal = canSet ? new Compiler.Local(ctx, _property.PropertyType) : null)
using (Compiler.Local newVal = new Compiler.Local(ctx, _property.PropertyType))
{
Compiler.Local valueForTail = null;
if (Tail.RequiresOldValue)
{
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(_property);
if (!oldVal.IsNullRef())
{
if (Tail.RequiresOldValue) // we need it later
{
ctx.CopyValue();
}
ctx.StoreValue(oldVal);
}
}
if (Tail.RequiresOldValue) // !here! <-- we need value again
{
if (!Tail.EmitReadReturnsValue)
{
ctx.StoreValue(newVal);
valueForTail = newVal;
} // otherwise valueForTail = null (leave value on stack)
}
Tail.EmitRead(ctx, valueForTail);
// otherwise newVal was passed to EmitRead so already has necessary data
if (Tail.EmitReadReturnsValue)
{
ctx.StoreValue(newVal);
}
// check-condition:
//(!Tail.RequiresOldValue // always set where can't check oldVal
// // and if it's value type or nullable with changed null/not null or ref
// || (Helpers.IsValueType(property.PropertyType) && oldVal != null && newVal != null)
// || !ReferenceEquals(oldVal, newVal)
// ))
if (canSet)
{
bool check = Tail.RequiresOldValue;
if (check)
{
var condition = !g.StaticFactory.InvokeReferenceEquals(oldVal, newVal);
if (Helpers.IsValueType(_property.PropertyType))
{
condition = (oldVal.AsOperand != null && newVal.AsOperand != null) || condition;
}
g.If(condition);
}
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(newVal);
if (_shadowSetter == null)
{
ctx.StoreValue(_property);
}
else
{
ctx.EmitCall(_shadowSetter);
}
if (check)
{
g.End();
}
}
if (EmitReadReturnsValue)
{
ctx.LoadValue(loc);
}
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (ctx.StartDebugBlockAuto(this))
{
using (Compiler.Local oldValue = ctx.GetLocalWithValueForEmitRead(this, valueFrom))
{
Compiler.Local tempLocal = null;
Compiler.Local valueForTail;
Debug.Assert(Tail.RequiresOldValue || Tail.EmitReadReturnsValue);
if (Tail.RequiresOldValue)
{
if (_expectedType.IsValueType)
{
tempLocal = ctx.Local(Tail.ExpectedType);
ctx.LoadAddress(oldValue, _expectedType);
ctx.EmitCall(_expectedType.GetMethod("GetValueOrDefault", Helpers.EmptyTypes));
ctx.StoreValue(tempLocal);
valueForTail = tempLocal;
}
else
{
valueForTail = oldValue;
}
}
else
{
valueForTail = null;
}
// valueForTail contains:
// null: when not required old value
// oldValue local: when reference type
// tempLocal: when nullable value type
Tail.EmitRead(ctx, valueForTail);
if (_expectedType.IsValueType)
{
if (!Tail.EmitReadReturnsValue)
{
ctx.LoadValue(tempLocal);
}
// note we demanded always returns a value
ctx.EmitCtor(_expectedType, Tail.ExpectedType); // re-nullable<T> it
}
if (Tail.EmitReadReturnsValue || _expectedType.IsValueType)
{
ctx.StoreValue(oldValue);
}
if (EmitReadReturnsValue)
{
ctx.LoadValue(oldValue);
}
if (!tempLocal.IsNullRef())
{
tempLocal.Dispose();
}
}
}
}
void IProtoSerializer.EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (ctx.StartDebugBlockAuto(this))
{
var g = ctx.G;
Helpers.DebugAssert(!valueFrom.IsNullRef());
using (Compiler.Local loc = ctx.GetLocalWithValueForEmitRead(this, valueFrom))
using (Compiler.Local token = ctx.Local(typeof(SubItemToken)))
using (Compiler.Local fieldNumber = new Compiler.Local(ctx, ctx.MapType(typeof(int))))
{
g.Assign(token, g.ReaderFunc.StartSubItem());
// pre-callbacks
if (HasCallbacks(TypeModel.CallbackType.BeforeDeserialize))
{
if (ExpectedType.IsValueType)
{
EmitCallbackIfNeeded(ctx, loc, TypeModel.CallbackType.BeforeDeserialize);
}
else
{ // could be null
Compiler.CodeLabel callbacksDone = ctx.DefineLabel();
ctx.LoadValue(loc);
ctx.BranchIfFalse(callbacksDone, false);
EmitCallbackIfNeeded(ctx, loc, TypeModel.CallbackType.BeforeDeserialize);
ctx.MarkLabel(callbacksDone);
}
}
Compiler.CodeLabel @continue = ctx.DefineLabel(), processField = ctx.DefineLabel();
ctx.Branch(@continue, false);
ctx.MarkLabel(processField);
foreach (BasicList.Group group in BasicList.GetContiguousGroups(_fieldNumbers, _serializers))
{
Compiler.CodeLabel tryNextField = ctx.DefineLabel();
int groupItemCount = group.Items.Count;
if (groupItemCount == 1)
{
// discreet group; use an equality test
ctx.LoadValue(fieldNumber);
ctx.LoadValue(group.First);
Compiler.CodeLabel processThisField = ctx.DefineLabel();
ctx.BranchIfEqual(processThisField, true);
ctx.Branch(tryNextField, false);
WriteFieldHandler(ctx, loc, processThisField, @continue, (IProtoSerializer)group.Items[0]);
}
else
{ // implement as a jump-table-based switch
ctx.LoadValue(fieldNumber);
ctx.LoadValue(group.First);
ctx.Subtract(); // jump-tables are zero-based
Compiler.CodeLabel[] jmp = new Compiler.CodeLabel[groupItemCount];
for (int i = 0; i < groupItemCount; i++)
{
jmp[i] = ctx.DefineLabel();
}
ctx.Switch(jmp);
// write the default...
ctx.Branch(tryNextField, false);
for (int i = 0; i < groupItemCount; i++)
{
WriteFieldHandler(ctx, loc, jmp[i], @continue, (IProtoSerializer)group.Items[i]);
}
}
ctx.MarkLabel(tryNextField);
}
EmitCreateIfNull(ctx, loc);
ctx.LoadReaderWriter();
if (_isExtensible)
{
ctx.LoadValue(loc);
ctx.EmitCall(ctx.MapType(typeof(ProtoReader)).GetMethod("AppendExtensionData"));
}
else
{
ctx.EmitCall(ctx.MapType(typeof(ProtoReader)).GetMethod("SkipField"));
}
ctx.MarkLabel(@continue);
ctx.EmitBasicRead("ReadFieldHeader", ctx.MapType(typeof(int)));
ctx.CopyValue();
ctx.StoreValue(fieldNumber);
ctx.LoadValue(0);
ctx.BranchIfGreater(processField, false);
EmitCreateIfNull(ctx, loc);
// post-callbacks
EmitCallbackIfNeeded(ctx, loc, TypeModel.CallbackType.AfterDeserialize);
g.Reader.EndSubItem(token);
if (EmitReadReturnsValue)
{
ctx.LoadValue(loc);
}
}
}
}