private IStackItem DeserializeStackItem(IExecutionEngine engine, BinaryReader reader)
{
EStackItemType type = (EStackItemType)reader.ReadByte();
switch (type)
{
case EStackItemType.ByteArray:
return(engine.CreateByteArray(reader.ReadVarBytes()));
case EStackItemType.Bool:
return(engine.CreateBool(reader.ReadBoolean()));
case EStackItemType.Integer:
return(engine.CreateInteger(new BigInteger(reader.ReadVarBytes())));
case EStackItemType.Array:
case EStackItemType.Struct:
{
IArrayStackItem array;
if (type == EStackItemType.Struct)
{
array = engine.CreateStruct();
}
else
{
array = engine.CreateArray();
}
ulong count = reader.ReadVarInt();
while (count-- > 0)
{
array.Add(DeserializeStackItem(engine, reader));
}
return(array);
}
case EStackItemType.Map:
{
IMapStackItem map = engine.CreateMap();
ulong count = reader.ReadVarInt();
while (count-- > 0)
{
IStackItem key = DeserializeStackItem(engine, reader);
IStackItem value = DeserializeStackItem(engine, reader);
map[key] = value;
key.Dispose();
value.Dispose();
}
return(map);
}
default: throw new FormatException();
}
}
private bool Runtime_Serialize(IExecutionEngine engine)
{
using (var context = engine.CurrentContext)
{
if (context == null)
{
return(false);
}
if (!context.EvaluationStack.TryPop(out IStackItem it))
{
return(false);
}
using (it)
{
using (MemoryStream ms = new MemoryStream())
using (BinaryWriter writer = new BinaryWriter(ms))
{
try
{
SerializeStackItem(it, writer);
}
catch
{
return(false);
}
writer.Flush();
using (var bi = engine.CreateByteArray(ms.ToArray()))
context.EvaluationStack.Push(bi);
}
}
}
return(true);
}
