1 files changed, 53 insertions, 0 deletions
diff --git a/include/cru/base/Base.h b/include/cru/base/Base.h
index 6dfe995a..af4d38ff 100644
--- a/include/cru/base/Base.h
+++ b/include/cru/base/Base.h
@@ -1,8 +1,12 @@
 #pragma once
 #include <cassert>
 #include <cstddef>
+#include <exception>
 #include <functional>
 #include <memory>
+#include <optional>
+#include <string>
+#include <string_view>
 
 #ifdef CRU_IS_DLL
 #ifdef CRU_BASE_EXPORT_API
@@ -105,4 +109,53 @@ inline void hash_combine(std::size_t& s, const T& v) {
 #define CRU_DEFINE_CLASS_LOG_TAG(tag) \
  private:                             \
   constexpr static const char* kLogTag = tag;
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4275)
+#endif
+class CRU_BASE_API Exception : public std::exception {
+ public:
+  explicit Exception(std::string message = "",
+                     std::shared_ptr<std::exception> inner = nullptr);
+
+  ~Exception() override;
+
+ public:
+  std::string GetUtf8Message() const { return this->message_; }
+
+  std::exception* GetInner() const noexcept { return inner_.get(); }
+
+  const char* what() const noexcept override;
+
+ protected:
+  void SetMessage(std::string message) { message_ = std::move(message); }
+  void AppendMessage(const std::string& additional_message);
+  void AppendMessage(std::string_view additional_message);
+  void AppendMessage(std::optional<std::string_view> additional_message);
+
+ private:
+  std::string message_;
+  std::shared_ptr<std::exception> inner_;
+};
+
+class CRU_BASE_API PlatformException : public Exception {
+ public:
+  using Exception::Exception;  // inherit constructors
+};
+
+class ErrnoException : public Exception {
+ public:
+  ErrnoException();
+  explicit ErrnoException(int error_code);
+  /**
+   * @brief will retrieve errno automatically.
+   */
+  explicit ErrnoException(std::string_view message);
+  ErrnoException(std::string_view message, int errno_code);
+
+  int GetErrnoCode() const { return errno_code_; }
+
+ private:
+  int errno_code_;
+};
 }  // namespace cru