rewrite client function compiler

src/DOLFileIndex.hh

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <inttypes.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "Menu.hh"
+
+struct DOLFileIndex {
+  struct File {
+    uint32_t menu_item_id;
+    std::string name;
+    std::string data;
+    bool is_compressed;
+  };
+
+  std::vector<std::shared_ptr<File>> item_id_to_file;
+  std::unordered_map<std::string, std::shared_ptr<File>> name_to_file;
+  std::shared_ptr<const Menu> menu;
+
+  DOLFileIndex() = default;
+  explicit DOLFileIndex(const std::string& directory);
+
+  inline bool empty() const {
+    return this->name_to_file.empty() && this->item_id_to_file.empty();
+  }
+};