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/*
 * This file is part of the GROMACS molecular simulation package.
 *
 * Copyright (c) 2010,2011,2012,2013,2015, by the GROMACS development team, led by
 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
 * and including many others, as listed in the AUTHORS file in the
 * top-level source directory and at http://www.gromacs.org.
 *
 * GROMACS is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * GROMACS is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GROMACS; if not, see
 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
 *
 * If you want to redistribute modifications to GROMACS, please
 * consider that scientific software is very special. Version
 * control is crucial - bugs must be traceable. We will be happy to
 * consider code for inclusion in the official distribution, but
 * derived work must not be called official GROMACS. Details are found
 * in the README & COPYING files - if they are missing, get the
 * official version at http://www.gromacs.org.
 *
 * To help us fund GROMACS development, we humbly ask that you cite
 * the research papers on the package. Check out http://www.gromacs.org.
 */
/*! \file
 * \brief
 * Declares error codes and related functions for fatal error handling.
 *
 * \author Teemu Murtola <teemu.murtola@gmail.com>
 * \ingroup module_utility
 */
#ifndef GMX_UTILITY_ERRORCODES_H
#define GMX_UTILITY_ERRORCODES_H

namespace gmx
{

/*! \addtogroup module_utility
 * \{
 */

/*! \brief
 * Possible error return codes from Gromacs functions.
 */
enum ErrorCode
{
    //! Zero for successful return.
    eeOK,

    //! Not enough memory to complete operation.
    eeOutOfMemory,
    //! Provided file could not be opened.
    eeFileNotFound,
    //! System I/O error.
    eeFileIO,
    //! Invalid user input (could not be understood).
    eeInvalidInput,
    //! Invalid user input (conflicting or unsupported settings).
    eeInconsistentInput,
    //! Simulation instability detected.
    eeInstability,

    /*! \name Error codes for buggy code
     *
     * Error codes below are for internal error checking; if triggered, they
     * should indicate a bug in the code.
     * \{
     */
    //! Requested feature not yet implemented.
    eeNotImplemented,
    //! Input value violates API specification.
    eeInvalidValue,
    //! Invalid routine called or wrong calling sequence detected.
    eeInvalidCall,
    //! Internal consistency check failed.
    eeInternalError,
    //! API specification was violated.
    eeAPIError,
    //! Range consistency check failed.
    eeRange,
    //! Communication consistency check failed.
    eeCommunication,
    //!\}

    //! Unknown error detected.
    eeUnknownError,
};

/*! \brief
 * Returns a short string description of an error code.
 *
 * \param[in] errorcode Error code to retrieve the string for.
 * \returns   A constant string corresponding to \p errorcode.
 *
 * If \p errorcode is not one of those defined for ::gmx::ErrorCode,
 * the string corresponding to ::eeUnknownError is returned.
 *
 * This function does not throw.
 */
const char *getErrorCodeString(int errorcode);

/*!\}*/

} // namespace gmx

#endif