private object ReadValue(Stream input, ValueTag tag, Type objectType)
{
switch (tag.Type)
{
case ValueType.Array:
{
return(this.ReadArray(input, tag, objectType));
}
case ValueType.Object:
{
return(objectType == typeof(object) || objectType == typeof(Dictionary <string, object>)
? this.ReadDictionary(input, tag, objectType)
: this.ReadObject(input, tag, objectType));
}
case ValueType.Bool:
{
return(input.ReadValueU8() != 0);
}
case ValueType.String:
{
return(this.ReadString(input, tag, objectType));
}
case ValueType.Int32:
{
return(input.ReadValueS32(Endian.Little));
}
case ValueType.Int64:
{
return(input.ReadValueS64(Endian.Little));
}
case ValueType.Float64:
{
return(input.ReadValueF64(Endian.Little));
}
case ValueType.Guid:
{
return(input.ReadValueGuid(Endian.Big));
}
case ValueType.SHA1:
{
var bytes = input.ReadBytes(20);
return(new SHA1Hash(bytes));
}
case ValueType.Bytes:
{
var length = input.ReadPackedValueUInt32();
var basePosition = input.Position;
var endPosition = basePosition + length;
if (endPosition > input.Length)
{
throw new EndOfStreamException();
}
var value = input.ReadBytes(length);
if (input.Position != endPosition)
{
throw new FormatException();
}
return(value);
}
}
throw new NotSupportedException();
}
public object Deserialize(Stream input, Type objectType)
{
var tag = new ValueTag(input.ReadValueU8());
return(this.ReadValue(input, tag, objectType));
}
private object ReadArray(Stream input, ValueTag tag, Type objectType)
{
if (objectType == null)
{
throw new ArgumentNullException("objectType");
}
if (objectType != typeof(object) && objectType.IsArray == false && IsGenericList(objectType) == false)
{
throw new ArgumentException("objectType");
}
var length = input.ReadPackedValueUInt32();
var basePosition = input.Position;
var endPosition = basePosition + length;
if (endPosition > input.Length)
{
throw new EndOfStreamException();
}
Type elementType;
if (objectType == typeof(object))
{
elementType = typeof(object);
}
else if (objectType.IsArray == true)
{
// Type[]
elementType = objectType.GetElementType();
}
else
{
// List<Type>
elementType = objectType.GetGenericArguments().Single();
}
var listType = typeof(List <>).MakeGenericType(elementType);
var list = (IList)Activator.CreateInstance(listType);
var elementTag = new ValueTag(input.ReadValueU8());
if (elementTag.Type != ValueType.Invalid)
{
do
{
var elementValue = this.ReadValue(input, elementTag, elementType);
list.Add(elementValue);
elementTag = new ValueTag(input.ReadValueU8());
}while (elementTag.Type != ValueType.Invalid);
}
if (input.Position != endPosition)
{
throw new FormatException();
}
if (objectType == typeof(object) || objectType.IsArray != true)
{
// just want the list
return(list);
}
var array = Array.CreateInstance(elementType, list.Count);
for (int i = 0; i < list.Count; i++)
{
array.SetValue(list[i], i);
}
return(array);
}
