} // updates field directly
#if FEAT_COMPILER
void IProtoSerializer.EmitWrite(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
Type expected = ExpectedType;
using (Compiler.Local loc = ctx.GetLocalWithValue(expected, valueFrom))
{
// pre-callbacks
EmitCallbackIfNeeded(ctx, loc, TypeModel.CallbackType.BeforeSerialize);
Compiler.CodeLabel startFields = ctx.DefineLabel();
// inheritance
if (CanHaveInheritance)
{
for (int i = 0; i < serializers.Length; i++)
{
IProtoSerializer ser = serializers[i];
Type serType = ser.ExpectedType;
if (serType != forType)
{
Compiler.CodeLabel ifMatch = ctx.DefineLabel(), nextTest = ctx.DefineLabel();
ctx.LoadValue(loc);
ctx.TryCast(serType);
ctx.CopyValue();
ctx.BranchIfTrue(ifMatch, true);
ctx.DiscardValue();
ctx.Branch(nextTest, true);
ctx.MarkLabel(ifMatch);
ser.EmitWrite(ctx, null);
ctx.Branch(startFields, false);
ctx.MarkLabel(nextTest);
}
}
if (constructType != null && constructType != forType)
{
using (Compiler.Local actualType = new Compiler.Local(ctx, ctx.MapType(typeof(System.Type))))
{
// would have jumped to "fields" if an expected sub-type, so two options:
// a: *exactly* that type, b: an *unexpected* type
ctx.LoadValue(loc);
ctx.EmitCall(ctx.MapType(typeof(object)).GetMethod("GetType"));
ctx.CopyValue();
ctx.StoreValue(actualType);
ctx.LoadValue(forType);
ctx.BranchIfEqual(startFields, true);
ctx.LoadValue(actualType);
ctx.LoadValue(constructType);
ctx.BranchIfEqual(startFields, true);
}
}
else
{
// would have jumped to "fields" if an expected sub-type, so two options:
// a: *exactly* that type, b: an *unexpected* type
ctx.LoadValue(loc);
ctx.EmitCall(ctx.MapType(typeof(object)).GetMethod("GetType"));
ctx.LoadValue(forType);
ctx.BranchIfEqual(startFields, true);
}
// unexpected, then... note that this *might* be a proxy, which
// is handled by ThrowUnexpectedSubtype
ctx.LoadValue(forType);
ctx.LoadValue(loc);
ctx.EmitCall(ctx.MapType(typeof(object)).GetMethod("GetType"));
ctx.EmitCall(ctx.MapType(typeof(TypeModel)).GetMethod("ThrowUnexpectedSubtype",
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static));
}
// fields
ctx.MarkLabel(startFields);
for (int i = 0; i < serializers.Length; i++)
{
IProtoSerializer ser = serializers[i];
if (ser.ExpectedType == forType)
{
ser.EmitWrite(ctx, loc);
}
}
// extension data
if (isExtensible)
{
ctx.LoadValue(loc);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("AppendExtensionData"));
}
// post-callbacks
EmitCallbackIfNeeded(ctx, loc, TypeModel.CallbackType.AfterSerialize);
}
}
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);
switch (members[i].MemberType)
{
case MemberTypes.Field:
ctx.LoadValue((FieldInfo)members[i]);
break;
case MemberTypes.Property:
ctx.LoadValue((PropertyInfo)members[i]);
break;
}
ctx.StoreValue(locals[i]);
}
if (!ExpectedType.IsValueType)
{
ctx.MarkLabel(skipOld);
}
using (Compiler.Local fieldNumber = new Compiler.Local(ctx, ctx.MapType(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]);
IProtoSerializer 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.LoadReaderWriter();
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);
}
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 IProtoSerializer.EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
Type expected = ExpectedType;
Helpers.DebugAssert(valueFrom != null);
using (Compiler.Local loc = ctx.GetLocalWithValue(expected, valueFrom))
using (Compiler.Local fieldNumber = new Compiler.Local(ctx, typeof(int)))
{
// pre-callbacks
if (HasCallbacks(TypeModel.CallbackType.BeforeDeserialize))
{
if (Helpers.IsValueType(ExpectedType))
{
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, expected, 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, expected, loc, jmp[i], @continue, (IProtoSerializer)group.Items[i]);
}
}
ctx.MarkLabel(tryNextField);
}
EmitCreateIfNull(ctx, loc);
ctx.LoadReader(true);
if (isExtensible)
{
ctx.LoadValue(loc);
ctx.EmitCall(typeof(ProtoReader).GetMethod("AppendExtensionData",
new[] { Compiler.ReaderUtil.ByRefStateType, typeof(IExtensible) }));
}
else
{
ctx.EmitCall(typeof(ProtoReader).GetMethod("SkipField", Compiler.ReaderUtil.StateTypeArray));
}
ctx.MarkLabel(@continue);
ctx.EmitBasicRead("ReadFieldHeader", 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);
if (valueFrom != null && !loc.IsSame(valueFrom))
{
ctx.LoadValue(loc);
ctx.Cast(valueFrom.Type);
ctx.StoreValue(valueFrom);
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (Compiler.Local oldList = AppendToCollection ? ctx.GetLocalWithValue(ExpectedType, valueFrom) : null)
using (Compiler.Local builder = new Compiler.Local(ctx, builderFactory.ReturnType))
{
ctx.EmitCall(builderFactory);
ctx.StoreValue(builder);
if (AppendToCollection)
{
Compiler.CodeLabel done = ctx.DefineLabel();
if (!Helpers.IsValueType(ExpectedType))
{
ctx.LoadValue(oldList);
ctx.BranchIfFalse(done, false); // old value null; nothing to add
}
ctx.LoadAddress(oldList, oldList.Type);
if (isEmpty != null)
{
ctx.EmitCall(Helpers.GetGetMethod(isEmpty, false, false));
ctx.BranchIfTrue(done, false); // old list is empty; nothing to add
}
else
{
ctx.EmitCall(Helpers.GetGetMethod(length, false, false));
ctx.BranchIfFalse(done, false); // old list is empty; nothing to add
}
Type voidType = typeof(void);
if (addRange != null)
{
ctx.LoadValue(builder);
ctx.LoadValue(oldList);
ctx.EmitCall(addRange);
if (addRange.ReturnType != null && add.ReturnType != voidType)
{
ctx.DiscardValue();
}
}
else
{
// loop and call Add repeatedly
MethodInfo moveNext, current, getEnumerator = GetEnumeratorInfo(out moveNext, out current);
Helpers.DebugAssert(moveNext != null);
Helpers.DebugAssert(current != null);
Helpers.DebugAssert(getEnumerator != null);
Type enumeratorType = getEnumerator.ReturnType;
using (Compiler.Local iter = new Compiler.Local(ctx, enumeratorType))
{
ctx.LoadAddress(oldList, ExpectedType);
ctx.EmitCall(getEnumerator);
ctx.StoreValue(iter);
using (ctx.Using(iter))
{
Compiler.CodeLabel body = ctx.DefineLabel(), next = ctx.DefineLabel();
ctx.Branch(next, false);
ctx.MarkLabel(body);
ctx.LoadAddress(builder, builder.Type);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(current);
ctx.EmitCall(add);
if (add.ReturnType != null && add.ReturnType != voidType)
{
ctx.DiscardValue();
}
ctx.MarkLabel(@next);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(moveNext);
ctx.BranchIfTrue(body, false);
}
}
}
ctx.MarkLabel(done);
}
EmitReadList(ctx, builder, Tail, add, packedWireType, false);
ctx.LoadAddress(builder, builder.Type);
ctx.EmitCall(finish);
if (ExpectedType != finish.ReturnType)
{
ctx.Cast(ExpectedType);
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
SanityCheck(property, Tail, out bool writeValue, ctx.NonPublic, ctx.AllowInternal(property));
if (ExpectedType.IsValueType && valueFrom is null)
{
throw new InvalidOperationException("Attempt to mutate struct on the head of the stack; changes would be lost");
}
using Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom);
if (Tail.RequiresOldValue)
{
ctx.LoadAddress(loc, ExpectedType); // stack is: old-addr
ctx.LoadValue(property); // stack is: old-value
}
Type propertyType = property.PropertyType;
ctx.ReadNullCheckedTail(propertyType, Tail, null); // stack is [new-value]
if (writeValue)
{
var localType = ChooseReadLocalType(property.PropertyType, Tail.ExpectedType);
using Compiler.Local newVal = new Compiler.Local(ctx, localType);
ctx.StoreValue(newVal); // stack is empty
Compiler.CodeLabel allDone = new Compiler.CodeLabel(); // <=== default structs
if (!localType.IsValueType)
{ // if the tail returns a null, intepret that as *no assign*
allDone = ctx.DefineLabel();
ctx.LoadValue(newVal); // stack is: new-value
ctx.BranchIfFalse(@allDone, true); // stack is empty
}
// assign the value
ctx.LoadAddress(loc, ExpectedType); // parent-addr
ctx.LoadValue(newVal); // parent-obj|new-value
// cast if needed (this is mostly for ReadMap/ReadRepeated)
if (!property.PropertyType.IsValueType && !localType.IsValueType &&
!property.PropertyType.IsAssignableFrom(localType))
{
ctx.Cast(property.PropertyType);
}
if (shadowSetter is null)
{
ctx.StoreValue(property); // empty
}
else
{
ctx.EmitCall(shadowSetter); // empty
}
if (!propertyType.IsValueType)
{
ctx.MarkLabel(allDone);
}
}
else
{ // don't want return value; drop it if anything there
// stack is [new-value]
if (Tail.ReturnsValue)
{
ctx.DiscardValue();
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom);
if (Tail.RequiresOldValue)
{
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(field);
}
// value is either now on the stack or not needed
ctx.ReadNullCheckedTail(field.FieldType, Tail, null);
// the field could be a backing field that needs to be raised back to
// the property if we're doing a full compile
MemberInfo member = field;
ctx.CheckAccessibility(ref member);
bool writeValue = member is FieldInfo;
if (writeValue)
{
if (Tail.ReturnsValue)
{
var localType = PropertyDecorator.ChooseReadLocalType(field.FieldType, Tail.ExpectedType);
using Compiler.Local newVal = new Compiler.Local(ctx, localType);
ctx.StoreValue(newVal);
if (field.FieldType.IsValueType)
{
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(newVal);
ctx.StoreValue(field);
}
else
{
Compiler.CodeLabel allDone = ctx.DefineLabel();
ctx.LoadValue(newVal);
ctx.BranchIfFalse(allDone, true); // interpret null as "don't assign"
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(newVal);
// cast if needed (this is mostly for ReadMap/ReadRepeated)
if (!field.FieldType.IsValueType && !localType.IsValueType &&
!field.FieldType.IsAssignableFrom(localType))
{
ctx.Cast(field.FieldType);
}
ctx.StoreValue(field);
ctx.MarkLabel(allDone);
}
}
}
else
{
// can't use result
if (Tail.ReturnsValue)
{
ctx.DiscardValue();
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (Compiler.Local oldList = AppendToCollection ? ctx.GetLocalWithValue(ExpectedType, valueFrom) : null)
using (Compiler.Local builder = new Compiler.Local(ctx, builderFactory.ReturnType))
{
ctx.EmitCall(builderFactory);
ctx.StoreValue(builder);
if (AppendToCollection)
{
Compiler.CodeLabel done = ctx.DefineLabel();
if (!Helpers.IsValueType(ExpectedType))
{
ctx.LoadValue(oldList);
ctx.BranchIfFalse(done, false); // old value null; nothing to add
}
#if COREFX
TypeInfo typeInfo = ExpectedType.GetTypeInfo();
#else
Type typeInfo = ExpectedType;
#endif
PropertyInfo prop = Helpers.GetProperty(typeInfo, "Length", false);
if (prop == null)
{
prop = Helpers.GetProperty(typeInfo, "Count", false);
}
#if !NO_GENERICS
if (prop == null)
{
prop = Helpers.GetProperty(ResolveIReadOnlyCollection(ExpectedType, Tail.ExpectedType), "Count", false);
}
#endif
ctx.LoadAddress(oldList, oldList.Type);
ctx.EmitCall(Helpers.GetGetMethod(prop, false, false));
ctx.BranchIfFalse(done, false); // old list is empty; nothing to add
Type voidType = ctx.MapType(typeof(void));
if (addRange != null)
{
ctx.LoadValue(builder);
ctx.LoadValue(oldList);
ctx.EmitCall(addRange);
if (addRange.ReturnType != null && add.ReturnType != voidType)
{
ctx.DiscardValue();
}
}
else
{
// loop and call Add repeatedly
MethodInfo moveNext, current, getEnumerator = GetEnumeratorInfo(ctx.Model, out moveNext, out current);
Helpers.DebugAssert(moveNext != null);
Helpers.DebugAssert(current != null);
Helpers.DebugAssert(getEnumerator != null);
Type enumeratorType = getEnumerator.ReturnType;
using (Compiler.Local iter = new Compiler.Local(ctx, enumeratorType))
{
ctx.LoadAddress(oldList, ExpectedType);
ctx.EmitCall(getEnumerator);
ctx.StoreValue(iter);
using (ctx.Using(iter))
{
Compiler.CodeLabel body = ctx.DefineLabel(), next = ctx.DefineLabel();
ctx.Branch(next, false);
ctx.MarkLabel(body);
ctx.LoadAddress(builder, builder.Type);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(current);
ctx.EmitCall(add);
if (add.ReturnType != null && add.ReturnType != voidType)
{
ctx.DiscardValue();
}
ctx.MarkLabel(@next);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(moveNext);
ctx.BranchIfTrue(body, false);
}
}
}
ctx.MarkLabel(done);
}
EmitReadList(ctx, builder, Tail, add, packedWireType, false);
ctx.LoadAddress(builder, builder.Type);
ctx.EmitCall(finish);
if (ExpectedType != finish.ReturnType)
{
ctx.Cast(ExpectedType);
}
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom))
{
if (Tail.RequiresOldValue)
{
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(field);
}
// value is either now on the stack or not needed
ctx.ReadNullCheckedTail(field.FieldType, Tail, null);
if (Tail.ReturnsValue)
{
using (Compiler.Local newVal = new Compiler.Local(ctx, field.FieldType))
{
ctx.StoreValue(newVal);
if (field.FieldType.IsValueType)
{
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(newVal);
ctx.StoreValue(field);
}
else
{
Compiler.CodeLabel allDone = ctx.DefineLabel();
ctx.LoadValue(newVal);
ctx.BranchIfFalse(allDone, true); // interpret null as "don't assign"
ctx.LoadAddress(loc, ExpectedType);
ctx.LoadValue(newVal);
ctx.StoreValue(field);
ctx.MarkLabel(allDone);
}
}
}
}
}
private bool EmitDedicatedMethod(Compiler.CompilerContext ctx, Compiler.Local valueFrom, bool read)
{
MethodBuilder method = ctx.GetDedicatedMethod(key, read);
if (method == null)
{
return(false);
}
using (Compiler.Local val = ctx.GetLocalWithValue(type, valueFrom))
using (Compiler.Local token = new ProtoBuf.Compiler.Local(ctx, typeof(SubItemToken)))
{
Type rwType = read ? typeof(ProtoReader) : typeof(ProtoWriter);
if (read)
{
ctx.LoadReader(true);
}
else
{
// write requires the object for StartSubItem; read doesn't
// (if recursion-check is disabled [subtypes] then null is fine too)
if (Helpers.IsValueType(type) || !recursionCheck)
{
ctx.LoadNullRef();
}
else
{
ctx.LoadValue(val);
}
ctx.LoadWriter(true);
}
ctx.EmitCall(Helpers.GetStaticMethod(rwType, "StartSubItem",
read ? ProtoReader.State.ReaderStateTypeArray : new Type[] { typeof(object), rwType, ProtoWriter.ByRefStateType }));
ctx.StoreValue(token);
if (read)
{
ctx.LoadReader(true);
ctx.LoadValue(val);
}
else
{
ctx.LoadWriter(true);
ctx.LoadValue(val);
}
ctx.EmitCall(method);
// handle inheritance (we will be calling the *base* version of things,
// but we expect Read to return the "type" type)
if (read && type != method.ReturnType)
{
ctx.Cast(type);
}
ctx.LoadValue(token);
if (read)
{
ctx.LoadReader(true);
ctx.EmitCall(Helpers.GetStaticMethod(rwType, "EndSubItem",
new Type[] { typeof(SubItemToken), rwType, ProtoReader.State.ByRefStateType }));
}
else
{
ctx.LoadWriter(true);
ctx.EmitCall(ProtoWriter.GetStaticMethod("EndSubItem"));
}
}
return(true);
}
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.LoadReader(true);
ctx.EmitCall(typeof(ProtoReader).GetMethod("StartSubItem",
Compiler.ReaderUtil.ReaderStateTypeArray));
ctx.StoreValue(token);
Compiler.CodeLabel next = ctx.DefineLabel(), processField = ctx.DefineLabel(), end = ctx.DefineLabel();
ctx.MarkLabel(next);
ctx.EmitBasicRead("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.LoadReader(true);
ctx.EmitCall(typeof(ProtoReader).GetMethod("SkipField", Compiler.ReaderUtil.StateTypeArray));
ctx.Branch(next, true);
// process
ctx.MarkLabel(processField);
if (Tail.RequiresOldValue)
{
if (Helpers.IsValueType(ExpectedType))
{
ctx.LoadAddress(oldValue, ExpectedType);
ctx.EmitCall(ExpectedType.GetMethod("GetValueOrDefault", Helpers.EmptyTypes));
}
else
{
ctx.LoadValue(oldValue);
}
}
Tail.EmitRead(ctx, null);
// note we demanded always returns a value
if (Helpers.IsValueType(ExpectedType))
{
ctx.EmitCtor(ExpectedType, Tail.ExpectedType); // re-nullable<T> it
}
ctx.StoreValue(oldValue);
ctx.Branch(next, false);
// outro
ctx.MarkLabel(end);
ctx.LoadValue(token);
ctx.LoadReader(true);
ctx.EmitCall(typeof(ProtoReader).GetMethod("EndSubItem",
new[] { typeof(SubItemToken), typeof(ProtoReader), Compiler.ReaderUtil.ByRefStateType }));
ctx.LoadValue(oldValue); // load the old value
}
}
protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
bool writeValue;
SanityCheck(ctx.Model, property, Tail, out writeValue, ctx.NonPublic, ctx.AllowInternal(property));
if (Helpers.IsValueType(ExpectedType) && valueFrom == null)
{
throw new InvalidOperationException("Attempt to mutate struct on the head of the stack; changes would be lost");
}
using (Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom))
{
if (Tail.RequiresOldValue)
{
ctx.LoadAddress(loc, ExpectedType); // stack is: old-addr
ctx.LoadValue(property); // stack is: old-value
}
Type propertyType = property.PropertyType;
ctx.ReadNullCheckedTail(propertyType, Tail, null, overrideType); // stack is [new-value]
if (writeValue)
{
var newType = overrideType != null ? overrideType : property.PropertyType;
using (Compiler.Local newVal = new Compiler.Local(ctx, newType))
{
ctx.StoreValue(newVal); // stack is empty
Compiler.CodeLabel allDone = new Compiler.CodeLabel(); // <=== default structs
if (!Helpers.IsValueType(propertyType))
{ // if the tail returns a null, intepret that as *no assign*
allDone = ctx.DefineLabel();
ctx.LoadValue(newVal); // stack is: new-value
ctx.BranchIfFalse(@allDone, true); // stack is empty
}
// assign the value
ctx.LoadAddress(loc, ExpectedType); // parent-addr
ctx.LoadValue(newVal); // parent-obj|new-value
if (overrideType != null)
{
ctx.Cast(property.PropertyType);
}
if (shadowSetter == null)
{
ctx.StoreValue(property); // empty
}
else
{
ctx.EmitCall(shadowSetter); // empty
}
if (!Helpers.IsValueType(propertyType))
{
ctx.MarkLabel(allDone);
}
}
}
else
{ // don't want return value; drop it if anything there
// stack is [new-value]
if (Tail.ReturnsValue)
{
ctx.DiscardValue();
}
}
}
}
protected override void EmitWrite(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
{
using (Compiler.Local valOrNull = ctx.GetLocalWithValue(expectedType, valueFrom))
using (Compiler.Local token = new Compiler.Local(ctx, ctx.MapType(typeof(SubItemToken))))
{
ctx.LoadNullRef();
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("StartSubItem"));
ctx.StoreValue(token);
if (expectedType.IsValueType)
{
ctx.LoadAddress(valOrNull, expectedType);
ctx.LoadValue(expectedType.GetProperty("HasValue"));
}
else
{
ctx.LoadValue(valOrNull);
}
Compiler.CodeLabel @end = ctx.DefineLabel();
ctx.BranchIfFalse(@end, false);
if (expectedType.IsValueType)
{
ctx.LoadAddress(valOrNull, expectedType);
ctx.EmitCall(expectedType.GetMethod("GetValueOrDefault", Helpers.EmptyTypes));
}
else
{
ctx.LoadValue(valOrNull);
}
Tail.EmitWrite(ctx, null);
ctx.MarkLabel(@end);
ctx.LoadValue(token);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("EndSubItem"));
}
}
