1 files changed, 67 insertions, 0 deletions
diff --git a/libs/installer_bsplugins/src/TESFile/Reader.h b/libs/installer_bsplugins/src/TESFile/Reader.h
new file mode 100644
index 0000000..0479842
--- /dev/null
+++ b/libs/installer_bsplugins/src/TESFile/Reader.h
@@ -0,0 +1,67 @@
+#ifndef TESFILE_READER_H
+#define TESFILE_READER_H
+
+#include "Stream.h"
+
+#include <concepts>
+#include <cstdint>
+#include <filesystem>
+#include <istream>
+#include <utility>
+
+namespace TESFile
+{
+
+template <typename Handler>
+concept ReaderHandler = requires(Handler& handler) {
+  {
+    handler.Group(std::declval<GroupData>())
+  } -> std::convertible_to<bool>;
+  {
+    handler.Form(std::declval<FormData>())
+  } -> std::convertible_to<bool>;
+  {
+    handler.Chunk(std::declval<Type>())
+  } -> std::convertible_to<bool>;
+  {
+    handler.Data(std::declval<std::istream&>())
+  };
+};
+
+template <ReaderHandler Handler>
+class Reader
+{
+public:
+  void parse(const std::filesystem::path& path, Handler& handler);
+
+  void parse(std::istream& stream, Handler& handler);
+
+private:
+  enum HeaderSize
+  {
+    HeaderSize_Standard  = sizeof(RecordHeader),
+    HeaderSize_Oblivion  = 20,
+    HeaderSize_Morrowind = 16,
+  };
+
+  std::uint32_t parsePluginInfo(std::istream& stream, Handler& handler);
+
+  std::uint32_t parseRecord(std::istream& stream, Handler& handler);
+
+  std::uint32_t handleForm(std::istream& stream, const RecordHeader& header,
+                           Handler& handler);
+
+  std::uint32_t handleGroup(std::istream& stream, const RecordHeader& header,
+                            Handler& handler);
+
+  std::uint32_t parseChunk(std::istream& stream, Handler& handler);
+
+  TESFormat chunkFormat_;
+  int headerSize_;
+};
+
+}  // namespace TESFile
+
+#include "Reader.inl"
+
+#endif  // TESFILE_READER_H