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Copy pathPPtrReader.cs
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235 lines (199 loc) · 7.72 KB
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace UnityDataTools.FileSystem.TypeTreeReaders;
// This class is used to extract all the PPtrs in a serialized object. It executes a callback whenever a PPtr is found.
// It provides a string representing the property path of the property (e.g. "m_MyObject.m_MyArray[2].m_PPtrProperty").
public class PPtrReader
{
public delegate void CallbackDelegate(long objectId, int fileId, long pathId, string propertyPath, string propertyType);
private SerializedFile m_SerializedFile;
private UnityFileReader m_Reader;
private long m_Offset;
private long m_ObjectId;
private StringBuilder m_StringBuilder = new();
private CallbackDelegate m_Callback;
public PPtrReader(SerializedFile serializedFile, UnityFileReader reader,
CallbackDelegate callback)
{
m_SerializedFile = serializedFile;
m_Reader = reader;
m_Callback = callback;
}
public void Process(long objectId, long offset, TypeTreeNode node)
{
m_Offset = offset;
m_ObjectId = objectId;
foreach (var child in node.Children)
{
m_StringBuilder.Clear();
m_StringBuilder.Append(child.Name);
ProcessNode(child);
}
}
private void ProcessNode(TypeTreeNode node)
{
if (node.IsBasicType)
{
m_Offset += node.Size;
}
else if (node.IsArray)
{
ProcessArray(node);
}
else if (node.Type == "vector" || node.Type == "map" || node.Type == "staticvector")
{
ProcessArray(node.Children[0]);
}
else if (node.Type.StartsWith("PPtr<"))
{
var startIndex = node.Type.IndexOf('<') + 1;
var endIndex = node.Type.Length - 1;
var referencedType = node.Type.Substring(startIndex, endIndex - startIndex);
ExtractPPtr(referencedType);
}
else if (node.CSharpType == typeof(string))
{
m_Offset += m_Reader.ReadInt32(m_Offset) + 4;
}
else if (node.IsManagedReferenceRegistry)
{
ProcessManagedReferenceRegistry(node);
}
else
{
foreach (var child in node.Children)
{
var size = m_StringBuilder.Length;
m_StringBuilder.Append('.');
m_StringBuilder.Append(child.Name);
ProcessNode(child);
m_StringBuilder.Remove(size, m_StringBuilder.Length - size);
}
}
if (
((int)node.MetaFlags & (int)TypeTreeMetaFlags.AlignBytes) != 0 ||
((int)node.MetaFlags & (int)TypeTreeMetaFlags.AnyChildUsesAlignBytes) != 0
)
{
m_Offset = (m_Offset + 3) & ~(3);
}
}
private void ProcessArray(TypeTreeNode node, bool isManagedReferenceRegistry = false)
{
var dataNode = node.Children[1];
if (dataNode.IsBasicType)
{
var arraySize = m_Reader.ReadInt32(m_Offset);
m_Offset += dataNode.Size * arraySize + 4;
}
else
{
var arraySize = m_Reader.ReadInt32(m_Offset);
m_Offset += 4;
for (int i = 0; i < arraySize; ++i)
{
if (!isManagedReferenceRegistry)
{
var size = m_StringBuilder.Length;
m_StringBuilder.Append('[');
m_StringBuilder.Append(i);
m_StringBuilder.Append(']');
ProcessNode(dataNode);
m_StringBuilder.Remove(size, m_StringBuilder.Length - size);
}
else
{
if (dataNode.Children.Count < 3)
throw new Exception("Invalid ReferencedObject");
// First child is rid.
long rid = m_Reader.ReadInt64(m_Offset);
m_Offset += 8;
ProcessManagedReferenceData(dataNode.Children[1], dataNode.Children[2], rid);
}
}
}
}
private void ProcessManagedReferenceRegistry(TypeTreeNode node)
{
if (node.Children.Count < 2)
throw new Exception("Invalid ManagedReferenceRegistry");
// First child is version number.
var version = m_Reader.ReadInt32(m_Offset);
m_Offset += node.Children[0].Size;
if (version == 1)
{
// Second child is the ReferencedObject.
var refObjNode = node.Children[1];
// And its children are the referenced type and data nodes.
var refTypeNode = refObjNode.Children[0];
var refObjData = refObjNode.Children[1];
int i = 0;
while (ProcessManagedReferenceData(refTypeNode, refObjData, i++))
{
}
}
else if (version == 2)
{
var refIdsVectorNode = node.Children[1];
if (refIdsVectorNode.Children.Count < 1 || refIdsVectorNode.Name != "RefIds")
throw new Exception("Invalid ManagedReferenceRegistry RefIds vector");
var refIdsArrayNode = refIdsVectorNode.Children[0];
if (refIdsArrayNode.Children.Count != 2 || !refIdsArrayNode.IsArray)
throw new Exception("Invalid ManagedReferenceRegistry RefIds array");
var size = m_StringBuilder.Length;
m_StringBuilder.Append('.');
m_StringBuilder.Append("RefIds");
ProcessArray(refIdsArrayNode, true);
m_StringBuilder.Remove(size, m_StringBuilder.Length - size);
}
else
{
throw new Exception("Unsupported ManagedReferenceRegistry version");
}
}
bool ProcessManagedReferenceData(TypeTreeNode refTypeNode, TypeTreeNode referencedTypeDataNode, long rid)
{
if (refTypeNode.Children.Count < 3)
throw new Exception("Invalid ReferencedManagedType");
var stringSize = m_Reader.ReadInt32(m_Offset);
var className = m_Reader.ReadString(m_Offset + 4, stringSize);
m_Offset += stringSize + 4;
m_Offset = (m_Offset + 3) & ~(3);
stringSize = m_Reader.ReadInt32(m_Offset);
var namespaceName = m_Reader.ReadString(m_Offset + 4, stringSize);
m_Offset += stringSize + 4;
m_Offset = (m_Offset + 3) & ~(3);
stringSize = m_Reader.ReadInt32(m_Offset);
var assemblyName = m_Reader.ReadString(m_Offset + 4, stringSize);
m_Offset += stringSize + 4;
m_Offset = (m_Offset + 3) & ~(3);
if ((className == "Terminus" && namespaceName == "UnityEngine.DMAT" && assemblyName == "FAKE_ASM") ||
rid == -1 || rid == -2)
{
return false;
}
var refTypeTypeTree = m_SerializedFile.GetRefTypeTypeTreeRoot(className, namespaceName, assemblyName);
// Process the ReferencedObject using its own TypeTree.
var size = m_StringBuilder.Length;
m_StringBuilder.Append("rid(");
m_StringBuilder.Append(rid);
m_StringBuilder.Append(").data");
ProcessNode(refTypeTypeTree);
m_StringBuilder.Remove(size, m_StringBuilder.Length - size);
return true;
}
private void ExtractPPtr(string referencedType)
{
var fileId = m_Reader.ReadInt32(m_Offset);
m_Offset += 4;
var pathId = m_Reader.ReadInt64(m_Offset);
m_Offset += 8;
if (fileId != 0 || pathId != 0)
{
m_Callback(m_ObjectId, fileId, pathId, m_StringBuilder.ToString(), referencedType);
}
}
}