Find correct launch module for XNA-based games

Added utility to parse game information and updated launch logic to use
it

src/xenia/kernel/util/gameinfo_utils.h

@@ -0,0 +1,81 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2016 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_KERNEL_UTIL_GAMEINFO_UTILS_H_
+#define XENIA_KERNEL_UTIL_GAMEINFO_UTILS_H_
+
+#include <string>
+#include <vector>
+
+#include "xenia/base/memory.h"
+
+namespace xe {
+namespace kernel {
+namespace util {
+
+class GameInfoWrapper {
+public:
+  GameInfoWrapper(const uint8_t *data, size_t data_size);
+
+  bool is_valid() const { return data_ != nullptr; }
+
+protected:
+  struct GameInfoBlockHeader {
+    xe::be<uint32_t> magic;
+    xe::be<uint32_t> block_size;
+  };
+  static_assert_size(GameInfoBlockHeader, 8);
+
+  struct GameInfoBlockExec {
+    const char *virtual_titleid;
+    const char *module_name;
+    const char *build_description;
+
+    const uint32_t VirtualTitleIdLength = 32;
+    const uint32_t ModuleNameLength = 42;
+    const uint32_t BuildDescriptionLength = 64;
+  };
+
+  struct GameInfoBlockComm {
+    xe::be<uint32_t> title_id;
+  };
+  static_assert_size(GameInfoBlockComm, 4);
+
+  struct GameInfoBlockTitl {
+    xe::be<wchar_t> title[128];
+    xe::be<wchar_t> description[256];
+    xe::be<wchar_t> publisher[256]; // assumed field name from wxPirs
+  };
+
+private:
+  const uint8_t *data_ = nullptr;
+  size_t data_size_ = 0;
+
+protected:
+  GameInfoBlockExec exec_;
+  const GameInfoBlockComm *comm_ = nullptr;
+  const GameInfoBlockTitl *titl_ = nullptr;
+};
+
+class GameInfo : public GameInfoWrapper {
+public:
+  GameInfo(const std::vector<uint8_t> &data)
+      : GameInfoWrapper(reinterpret_cast<const uint8_t *>(data.data()),
+                        data.size()) {}
+
+  uint32_t title_id() const;
+  std::string virtual_title_id() const;
+  std::string module_name() const;
+};
+
+} // namespace util
+} // namespace kernel
+} // namespace xe
+
+#endif // XENIA_KERNEL_UTIL_GAMEINFO_UTILS_H_