void WriteTrait(AmfTrait trait)
{
// By reference or by instance?
if (_traitLookup.TryGetValue(trait, out int index))
{
WriteU29((index << 2) | 1);
return;
}
_traitLookup.Add(trait, _traitLookup.Count);
// Index and flags
index = 3; // 0b0011. trait by instance, obj by instance
if (trait.IsExternalizable)
{
index |= 4; // 0b0100
}
if (trait.IsDynamic)
{
index |= 8; // 0b1000
}
index |= (trait.Properties.Length << 4);
WriteU29(index);
// Name and properties
WriteString(trait.Name);
foreach (var name in trait.Properties)
{
WriteString(name);
}
}
AmfTrait ReadTrait(int refIndex)
{
// Stored by ref?
bool isInstance = PopFlag(ref refIndex);
if (!isInstance)
{
return(_traitLookup[refIndex]);
}
// Stored by value
var result = new AmfTrait();
_traitLookup.Add(result);
result.IsExternalizable = PopFlag(ref refIndex);
result.IsDynamic = PopFlag(ref refIndex);
result.Name = ReadString();
result.Properties = new string[refIndex];
for (var i = 0; i < result.Properties.Length; i++)
{
result.Properties[i] = ReadString();
}
// Special hack for serializable traits
return(result);
}
public AmfObject(AmfTypes type)
{
Type = type;
if (type == AmfTypes.Object)
{
Trait = new AmfTrait {
Name = "", IsDynamic = true, Properties = new string[0]
};
}
}