add object graph parser

src/PSOGCObjectGraph.hh

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <inttypes.h>
+
+#include <memory>
+#include <phosg/Encoding.hh>
+#include <phosg/Strings.hh>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+
+
+struct PSOGCObjectGraph {
+  PSOGCObjectGraph(const std::string& memory_data, uint32_t root_address);
+
+  void print(FILE* stream) const;
+
+  struct VTable {
+    uint32_t address;
+    uint32_t destroy_addr;
+    uint32_t update_addr;
+    uint32_t render_addr;
+    uint32_t render_shadow_addr;
+  };
+
+  struct Object {
+    uint32_t address;
+    uint16_t flags;
+    std::string type_name;
+    std::shared_ptr<VTable> vtable;
+    std::shared_ptr<Object> parent;
+    std::vector<std::shared_ptr<Object>> children;
+
+    void print(FILE* stream, size_t indent_level = 0) const;
+  };
+
+  std::shared_ptr<Object> root;
+  std::unordered_map<uint32_t, std::shared_ptr<Object>> all_objects;
+  std::unordered_map<uint32_t, std::shared_ptr<VTable>> all_vtables;
+
+  std::shared_ptr<Object> parse_object_memo(StringReader& r, uint32_t addr);
+  std::shared_ptr<VTable> parse_vtable_memo(StringReader& r, uint32_t addr);
+};