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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*!
* \file errors.h
*
* \author Lubos Slovak <lubos.slovak@nic.cz>
* \author Marek Vavrusa <marek.vavrusa@nic.cz>
*
* \brief Error codes and function for getting error message.
*
* \addtogroup common_lib
* @{
*/
#ifndef _KNOTD_COMMON_ERROR_H_
#define _KNOTD_COMMON_ERROR_H_
#include <errno.h>
/*! \brief Error lookup table. */
typedef struct error_table_t {
int id;
const char *name;
} error_table_t;
/*!
* \brief Returns error message for the given error code.
*
* \param table Table of error messages to use.
* \param code Error code.
*
* \return String containing the error message.
*/
const char *error_to_str(const error_table_t *table, int code);
/*!
* \brief Safe errno mapper that automatically appends sentinel value.
*
* \see _map_errno()
*
* \param fallback_value Fallback error value (used if the code could not be
* mapped.
* \param err POSIX errno.
* \param ... List of handled codes.
*
* \return Mapped error code.
*/
#define map_errno(fallback_value, err...) _map_errno(fallback_value, err, 0)
/*!
* \brief Returns a mapped POSIX errcode.
*
* \warning Last error must be 0, it serves as a sentinel value.
* Use map_errno() instead.
*
* \param fallback_value Fallback error value (used if the code could not be
* mapped.
* \param arg0 First mandatory argument.
* \param ... List of handled codes.
*
* \return Mapped error code.
*/
int _map_errno(int fallback_value, int arg0, ...);
#endif /* _KNOTD_COMMON_ERROR_H_ */
/*! @} */
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