// Custom includes
#include <exception>
#include <string>
+#include <boost/preprocessor/repeat.hpp>
+#include <boost/preprocessor/cat.hpp>
//#include "Exception.mpp"
///////////////////////////////hh.p////////////////////////////////////////
This exception is thrown to signal generic errno failures.
- \todo make where and err accessors and make the member vars private
+ \todo make where and err accessors and make the member variables private
- \idea Add a template class derived from SystemException which
- takes the error number as a numeric argument. This allows
- catching specific errno conditions: ErrnoException<EPIPE> etc.
+ \idea Add a template class derived from SystemException which takes the error number as a
+ numeric argument. This allows catching specific errno conditions: ErrnoException<EPIPE> etc.
- \idea Add a generic error thrower which takes the origin
- string and errno value as an argument and will throw a
- corresponding template class instance. This would just be a
- big switch statement containing all possible errno values,
- probably created using some macro metaprogramming.
+ \idea Add a generic error thrower which takes the origin string and errno value as an
+ argument and will throw a corresponding template class instance. This would just be a big
+ switch statement containing all possible errno values, probably created using some macro
+ meta-programming.
*/
class SystemException : public std::exception
{
public:
- explicit SystemException(int err); ///< SystemException without error lokus info
- /**< \param[in] err error number (the errno value) */
- SystemException(char const * where, int err); ///< SystemException with error location info
+ SystemException(); ///< SystemException without error location infor
+ /**< The error code is taken from the current value of the
+ global 'errno' variable */
+
+ explicit SystemException(int code); ///< SystemException without error location info
+ /**< \param[in] code error number (the errno value) */
+
+ explicit SystemException(char const * where); ///< SystemException with error location info
+ /**< The error code is taken from the current value of the
+ global 'errno' variable
+ \param[in] where description of error origin */
+
+ SystemException(char const * where, int code); ///< SystemException with error location info
/**< \param[in] where description of error origin
- \param[in] err error number (the errno value) */
+ \param[in] code error number (the errno value) */
virtual char const * what() const throw(); ///< Return verbose error description
- char const * where; ///< Error origin
- int err; ///< Error number
+ char const * where() const; ///< Error origin
+ int code() const; ///< Error code (errno number)
+ char const * description() const; ///< Error description (strerror() value)
+
+ bool anyOf(int c0, int c1=0, int c2=0, int c3=0, int c4=0, int c5=0,
+ int c6=0, int c7=0, int c8=0, int c9=0);
virtual ~SystemException() throw();
+
private:
void init();
+
+ char const * const where_;
+ int const code_;
std::string buffer_;
};
+ template <int Code>
+ class ErrnoException : public SystemException
+ {
+ public:
+ static int const fixed_code = Code;
+
+ ErrnoException();
+ explicit ErrnoException(char const * where);
+ };
+
+ void throwErrno();
+ void throwErrno(char const * where);
+ void throwErrno(int code);
+ void throwErrno(char const * where, int code);
+
enum NoThrow_t { nothrow };
}
///////////////////////////////hh.e////////////////////////////////////////
#include "Exception.cci"
//#include "Exception.ct"
-//#include "Exception.cti"
+#include "Exception.cti"
#endif
\f