I thought I would share what I am using for exceptions given the
excellent advice from everyone responding to my initial email. There is
no usages of any memory allocation or std::string like variables.
If there are any 'oops' or 'gotchas' please let me know.
My plan is to use a command flag for taking into a value. The value will
determine what debug messages are reported at the cause of the problem.
The message will be displayed via std::cerr.
Stephen
----------------
Header
----------------
#ifndef IO_EXCEPTION_H_
#define IO_EXCEPTION_H_
#include <exception>
#include
namespace kurt {
/*!
* \class IOException
* \brief Rather than inheriting from ifstream this class delegates
* any required functionality to it.
* \date 2003
* \author Stephen Torri
*/
class IO_Exception : public virtual std::exception {
public:
IO_Exception (uint32_t message_id);
/*!
* \brief Destructor
*/
virtual ~IO_Exception (void) throw(){}
/*!
* \brief Return the extra message accompanying the exception.
*/
const char* what (void) const throw();
/*!
* \brief Return tne name of the exception
*/
const char* name (void) const throw();
enum {
CANNOT_OPEN,
INPUT_CORRUPTED,
INVALID_IO_OP,
READ_ERROR,
UNSUPPORTED_OP,
WRITE_ERROR,
};
private:
static const char* m_exception_name;
static const char* m_messages[];
uint32_t m_id;
};
} /* namespace kurt */
-------------
Source
-------------
#include "IOException.hpp"
namespace kurt {
const char* IO_Exception::m_exception_name = "IO_Exception";
const char* IO_Exception::m_messages [] = {
"I/O Error: cannot open", // CANNOT_OPEN
"Input data is corrupted", // INPUT_CORRUPTED
"Invalid i/o operation attempted", // INVALID_IO_OP
"Error reading input", // READ_ERROR
"Unsupported I/O operation", // UNSUPPORTED_OP
"Error writing output", // WRITE_ERROR
};
IO_Exception::IO_Exception (uint32_t message_id)
: std::exception(),
m_id(message_id)
{}
const char*
IO_Exception::what (void) const throw()
{
return m_messages[m_id];
}
const char*
IO_Exception::name (void) const throw()
{
return m_exception_name;
}
} /* namespace kurt */
#endif /* IO_EXCEPTION_H_ */
--
Email: storri@torri.org
Stephen torri