protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using Compiler.Local oldValue = ctx.GetLocalWithValue(ExpectedType, valueFrom);
using Compiler.Local token = new Compiler.Local(ctx, typeof(SubItemToken));
using Compiler.Local field = new Compiler.Local(ctx, typeof(int));
ctx.LoadState();
ctx.EmitCall(typeof(ProtoReader.State).GetMethod(nameof(ProtoReader.State.StartSubItem), Type.EmptyTypes));
ctx.StoreValue(token);
Compiler.CodeLabel next = ctx.DefineLabel(), processField = ctx.DefineLabel(), end = ctx.DefineLabel();
ctx.MarkLabel(next);
ctx.EmitStateBasedRead(nameof(ProtoReader.State.ReadFieldHeader), typeof(int));
ctx.CopyValue();
ctx.StoreValue(field);
ctx.LoadValue(Tag); // = 1 - process
ctx.BranchIfEqual(processField, true);
ctx.LoadValue(field);
ctx.LoadValue(1); // < 1 - exit
ctx.BranchIfLess(end, false);
// default: skip
ctx.LoadState();
ctx.EmitCall(typeof(ProtoReader.State).GetMethod(nameof(ProtoReader.State.SkipField), Type.EmptyTypes));
ctx.Branch(next, true);
// process
ctx.MarkLabel(processField);
if (Tail.RequiresOldValue)
{
if (ExpectedType.IsValueType)
{
ctx.LoadAddress(oldValue, ExpectedType);
ctx.EmitCall(ExpectedType.GetMethod("GetValueOrDefault", Type.EmptyTypes));
}
else
{
ctx.LoadValue(oldValue);
}
}
Tail.EmitRead(ctx, null);
// note we demanded always returns a value
if (ExpectedType.IsValueType)
{
ctx.EmitCtor(ExpectedType, Tail.ExpectedType); // re-nullable<T> it
}
ctx.StoreValue(oldValue);
ctx.Branch(next, false);
// outro
ctx.MarkLabel(end);
ctx.LoadState();
ctx.LoadValue(token);
ctx.EmitCall(typeof(ProtoReader.State).GetMethod(nameof(ProtoReader.State.EndSubItem),
new[] { typeof(SubItemToken) }));
ctx.LoadValue(oldValue); // load the old value
}
void IRuntimeProtoSerializerNode.EmitRead(Compiler.CompilerContext ctx, Compiler.Local entity)
{
if (wellKnown)
{
ctx.LoadValue(entity);
}
ctx.EmitStateBasedRead(typeof(BclHelpers),
wellKnown ? nameof(BclHelpers.ReadTimestamp) : nameof(BclHelpers.ReadDateTime),
ExpectedType);
}
void IRuntimeProtoSerializerNode.EmitRead(Compiler.CompilerContext ctx, Compiler.Local entity)
{
ctx.EmitStateBasedRead(nameof(ProtoReader.State.ReadInt32), ExpectedType);
}
void IRuntimeProtoSerializerNode.EmitRead(Compiler.CompilerContext ctx, Compiler.Local entity)
{
ctx.EmitStateBasedRead(typeof(BclHelpers), nameof(BclHelpers.ReadGuid), ExpectedType);
}
public void EmitRead(Compiler.CompilerContext ctx, Compiler.Local incoming)
{
using Compiler.Local objValue = ctx.GetLocalWithValue(ExpectedType, incoming);
Compiler.Local[] locals = new Compiler.Local[members.Length];
try
{
for (int i = 0; i < locals.Length; i++)
{
Type type = GetMemberType(i);
bool store = true;
locals[i] = new Compiler.Local(ctx, type);
if (!ExpectedType.IsValueType)
{
// value-types always read the old value
if (type.IsValueType)
{
switch (Helpers.GetTypeCode(type))
{
case ProtoTypeCode.Boolean:
case ProtoTypeCode.Byte:
case ProtoTypeCode.Int16:
case ProtoTypeCode.Int32:
case ProtoTypeCode.SByte:
case ProtoTypeCode.UInt16:
case ProtoTypeCode.UInt32:
ctx.LoadValue(0);
break;
case ProtoTypeCode.Int64:
case ProtoTypeCode.UInt64:
ctx.LoadValue(0L);
break;
case ProtoTypeCode.Single:
ctx.LoadValue(0.0F);
break;
case ProtoTypeCode.Double:
ctx.LoadValue(0.0D);
break;
case ProtoTypeCode.Decimal:
ctx.LoadValue(0M);
break;
case ProtoTypeCode.Guid:
ctx.LoadValue(Guid.Empty);
break;
default:
ctx.LoadAddress(locals[i], type);
ctx.EmitCtor(type);
store = false;
break;
}
}
else
{
ctx.LoadNullRef();
}
if (store)
{
ctx.StoreValue(locals[i]);
}
}
}
Compiler.CodeLabel skipOld = ExpectedType.IsValueType
? new Compiler.CodeLabel()
: ctx.DefineLabel();
if (!ExpectedType.IsValueType)
{
ctx.LoadAddress(objValue, ExpectedType);
ctx.BranchIfFalse(skipOld, false);
}
for (int i = 0; i < members.Length; i++)
{
ctx.LoadAddress(objValue, ExpectedType);
if (members[i] is FieldInfo fieldInfo)
{
ctx.LoadValue(fieldInfo);
}
else if (members[i] is PropertyInfo propertyInfo)
{
ctx.LoadValue(propertyInfo);
}
ctx.StoreValue(locals[i]);
}
if (!ExpectedType.IsValueType)
{
ctx.MarkLabel(skipOld);
}
using (Compiler.Local fieldNumber = new Compiler.Local(ctx, typeof(int)))
{
Compiler.CodeLabel @continue = ctx.DefineLabel(),
processField = ctx.DefineLabel(),
notRecognised = ctx.DefineLabel();
ctx.Branch(@continue, false);
Compiler.CodeLabel[] handlers = new Compiler.CodeLabel[members.Length];
for (int i = 0; i < members.Length; i++)
{
handlers[i] = ctx.DefineLabel();
}
ctx.MarkLabel(processField);
ctx.LoadValue(fieldNumber);
ctx.LoadValue(1);
ctx.Subtract(); // jump-table is zero-based
ctx.Switch(handlers);
// and the default:
ctx.Branch(notRecognised, false);
for (int i = 0; i < handlers.Length; i++)
{
ctx.MarkLabel(handlers[i]);
IRuntimeProtoSerializerNode tail = tails[i];
Compiler.Local oldValIfNeeded = tail.RequiresOldValue ? locals[i] : null;
ctx.ReadNullCheckedTail(locals[i].Type, tail, oldValIfNeeded);
if (tail.ReturnsValue)
{
if (locals[i].Type.IsValueType)
{
ctx.StoreValue(locals[i]);
}
else
{
Compiler.CodeLabel hasValue = ctx.DefineLabel(), allDone = ctx.DefineLabel();
ctx.CopyValue();
ctx.BranchIfTrue(hasValue, true); // interpret null as "don't assign"
ctx.DiscardValue();
ctx.Branch(allDone, true);
ctx.MarkLabel(hasValue);
ctx.StoreValue(locals[i]);
ctx.MarkLabel(allDone);
}
}
ctx.Branch(@continue, false);
}
ctx.MarkLabel(notRecognised);
ctx.LoadState();
ctx.EmitCall(typeof(ProtoReader.State).GetMethod(nameof(ProtoReader.State.SkipField), Type.EmptyTypes));
ctx.MarkLabel(@continue);
ctx.EmitStateBasedRead(nameof(ProtoReader.State.ReadFieldHeader), typeof(int));
ctx.CopyValue();
ctx.StoreValue(fieldNumber);
ctx.LoadValue(0);
ctx.BranchIfGreater(processField, false);
}
for (int i = 0; i < locals.Length; i++)
{
ctx.LoadValue(locals[i]);
}
ctx.EmitCtor(ctor);
ctx.StoreValue(objValue);
}
finally
{
for (int i = 0; i < locals.Length; i++)
{
if (locals[i] != null)
{
locals[i].Dispose(); // release for re-use
}
}
}
}
void IRuntimeProtoSerializerNode.EmitRead(Compiler.CompilerContext ctx, Compiler.Local entity)
{
ctx.EmitStateBasedRead(nameof(ProtoReader.State.ReadUInt16), typeof(ushort));
}
