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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/>.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "common/errors.h"
/*!
* \brief Looks up the given id in the lookup table.
*
* \param table Lookup table.
* \param id ID to look up.
*
* \return Item in the lookup table with the given id or NULL if no such is
* present.
*/
static const error_table_t *error_lookup_by_id(const error_table_t *table,
int id)
{
while (table->name != 0) {
if (table->id == id) {
return table;
}
table++;
}
return 0;
}
const char *error_to_str(const error_table_t *table, int code)
{
const error_table_t *msg = error_lookup_by_id(table, code);
if (msg != 0) {
return msg->name;
} else {
return "Unknown error.";
}
}
int _map_errno(int fallback_value, int arg0, ...)
{
/* Iterate all variable-length arguments. */
va_list ap;
va_start(ap, arg0);
/* KNOTD_ERROR serves as a sentinel. */
for (int c = arg0; c != 0; c = va_arg(ap, int)) {
/* Error code matches with mapped. */
if (c == errno) {
/* Return negative value of the code. */
return -abs(c);
}
}
va_end(ap);
/* Fallback error code. */
return fallback_value;
}
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