1 files changed, 60 insertions, 0 deletions
diff --git a/include/cru/base/Exception.h b/include/cru/base/Exception.h
new file mode 100644
index 00000000..609fd2c9
--- /dev/null
+++ b/include/cru/base/Exception.h
@@ -0,0 +1,60 @@
+#pragma once
+#include "String.h"
+
+#include <exception>
+#include <optional>
+
+namespace cru {
+#ifdef _MSC_VER
+#pragma warning(disable : 4275)
+#endif
+class CRU_BASE_API Exception : public std::exception {
+ public:
+  explicit Exception(String message = {},
+                     std::unique_ptr<std::exception> inner = nullptr);
+
+  ~Exception() override;
+
+ public:
+  String GetMessage() const { return message_; }
+
+  std::exception* GetInner() const noexcept { return inner_.get(); }
+
+  const char* what() const noexcept override;
+
+ protected:
+  void SetMessage(String message) { message_ = std::move(message); }
+
+  void AppendMessage(StringView additional_message);
+  void AppendMessage(std::optional<StringView> additional_message);
+
+ private:
+  String message_;
+  mutable std::string utf8_message_;
+  std::unique_ptr<std::exception> inner_;
+};
+
+class CRU_BASE_API TextEncodeException : public Exception {
+ public:
+  using Exception::Exception;
+};
+
+class ErrnoException : public Exception {
+ public:
+  /**
+   * @brief will retrieve errno automatically.
+   */
+  explicit ErrnoException(String message = {});
+  ErrnoException(String message, int errno_code);
+
+  CRU_DELETE_COPY(ErrnoException)
+  CRU_DELETE_MOVE(ErrnoException)
+
+  ~ErrnoException() override = default;
+
+  int GetErrnoCode() const { return errno_code_; }
+
+ private:
+  int errno_code_;
+};
+}  // namespace cru