public void EmitRead(SerializerCodeGen g, EmitReadMetaDelegate readNextMeta, Action prepareInstance, Action <Local> add)
{
if (readNextMeta == null)
{
readNextMeta = (s, f) => f();
}
using (g.ctx.StartDebugBlockAuto(this))
{
WireType packedWireType = _packedWireTypeForRead;
bool packedAllowedStatic = (!_protoCompatibility || packedWireType != WireType.None);
using (var packed = packedAllowedStatic ? g.ctx.Local(typeof(bool)) : null)
using (var token = g.ctx.Local(typeof(SubItemToken)))
using (var fieldNumber = _protoCompatibility ? g.ctx.Local(typeof(int)):null)
using (var loop = g.ctx.Local(typeof(bool)))
{
if (!fieldNumber.IsNullRef())
{
g.Assign(fieldNumber, g.ReaderFunc.FieldNumber());
}
if (packedAllowedStatic)
{
g.Assign(packed, g.ReaderFunc.WireType() == WireType.String);
}
bool subItemNeededStatic = !_protoCompatibility;
if (subItemNeededStatic || packedAllowedStatic)
{
if (!subItemNeededStatic)
{
g.If(packed);
}
g.Assign(token, g.ReaderFunc.StartSubItem());
if (!subItemNeededStatic)
{
g.End();
}
}
g.ctx.MarkDebug("ProtoCompatibility: " + _protoCompatibility);
if (_protoCompatibility)
{
// this is not an error that we don't wait for the first item
// if field is present there is at least one element
prepareInstance?.Invoke();
if (packedAllowedStatic)
{
g.If(packed);
{
g.While(g.ReaderFunc.HasSubValue_bool(packedWireType));
{
EmitReadElementContent(g, add);
}
g.End();
}
g.Else();
}
g.DoWhile();
{
EmitReadElementContent(g, add);
}
g.EndDoWhile(g.ReaderFunc.TryReadFieldHeader_bool(fieldNumber));
if (packedAllowedStatic)
{
g.End();
}
}
else
{
var breakLabel = g.DefineLabel();
g.DoWhile();
{
g.Assign(loop, false);
readNextMeta(
() =>
{
using (g.ctx.StartDebugBlockAuto(this, "readNextMeta.OnSuccess"))
{
g.Assign(loop, true);
}
},
() =>
{
using (g.ctx.StartDebugBlockAuto(this, "readNextMeta.OnFail"))
{
g.If(!g.ReaderFunc.TryReadFieldHeader_bool(FieldItem));
{
g.If(g.ReaderFunc.ReadFieldHeader_int() == 0);
{
g.Goto(breakLabel);
}
g.End();
g.Reader.SkipField();
g.Assign(loop, true);
}
g.End();
}
});
}
g.EndDoWhile(loop);
g.MarkLabel(breakLabel);
prepareInstance?.Invoke();
g.If(g.ReaderFunc.FieldNumber() == FieldItem);
{
g.If(packed);
{
using (var packedWireTypeDynamic = g.ctx.Local(typeof(WireType)))
{
g.Assign(packedWireTypeDynamic, g.ReaderFunc.WireType());
g.DoWhile();
{
EmitReadElementContent(g, add);
}
g.EndDoWhile(g.ReaderFunc.HasSubValue_bool(packedWireTypeDynamic));
}
}
g.Else();
{
g.DoWhile();
{
EmitReadElementContent(g, add);
}
g.EndDoWhile(g.ReaderFunc.TryReadFieldHeader_bool(FieldItem));
}
g.End();
}
g.End();
}
if (subItemNeededStatic || packedAllowedStatic)
{
if (!subItemNeededStatic)
{
g.If(packed);
}
g.Reader.EndSubItem(token);
if (!subItemNeededStatic)
{
g.End();
}
}
}
}
}