xsexception.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */
#ifdef __cplusplus
#ifndef XSEXCEPTION_H
#define XSEXCEPTION_H
 
#include <exception>
#include "xsresultvalue.h"
#include "xsstring.h"
 
/*! \brief Exception class for Xsens public libraries. Inherits from
 * std::exception
*/
class XsException : public std::exception
{
   public:
        //! \brief Copy constructor
        XsException(XsException const& e)
                : m_code(e.m_code), m_description(e.m_description)
        {
        }
 
        /*! \brief Initializing constructor
                \details This constructor uses the value in \a err and the supplied \a
           description to create a full
                text for when the user requests what() or text()
                \param err The error code that the exception should report
                \param description A description of the error. The constructor prefixes
           this with a textual
                                                        description of the error code unless prefix is
           false.
                \param prefix Whether to prefix the description with a textual
           description of the error code or not (default is yes)
        */
        XsException(
                XsResultValue err, XsString const& description, bool prefix = true)
                : m_code(err), m_description(description)
        {
                if (prefix && (m_code != XRV_OK))
                {
                        char codeString[16];
                        sprintf(codeString, "%d: ", (int)m_code);
                        XsString rv(codeString);
                        rv << XsResultValue_toString(m_code);
                        if (!m_description.empty()) rv << "\tInfo: ";
                        rv.append(m_description);
                        m_description = rv;
                }
        }
 
        /*! \brief Initializing constructor
                \param description A description of the error.
        */
        explicit XsException(XsString const& description)
                : m_code(XRV_ERROR), m_description(description)
        {
        }
 
        //! \brief Destructor
        virtual ~XsException() throw() {}
        //! \brief Assignment operator, copies \a e to this
        XsException& operator=(XsException const& e)
        {
                m_code = e.m_code;
                m_description = e.m_description;
                return *this;
        }
 
        //! \brief Returns the error value supplied during construction
        inline XsResultValue code() const throw() { return m_code; }
        //! \brief Returns a description of the error that occurred as a char const*
        inline char const* what() const throw() { return m_description.c_str(); }
        //! \brief Returns a description of the error that occurred as a XsString
        inline XsString const& text() const throw() { return m_description; }
        /*! \brief Throw/raise the exception object
                \note Override this in inheriting classes to make sure the proper type
           of exception is raised
        */
        virtual void raise() const { throw * this; }
   private:
        /** The supplied error code */
        XsResultValue m_code;
        /** The supplied description, prefixed with a description of the error code
         */
        XsString m_description;
};
 
#endif  // file guard
#endif  // __cplusplus guard