/*  Copyright (C) 2018 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 <https://www.gnu.org/licenses/>.
 */

#pragma once

#include <stdint.h>
#include <stdlib.h>

/*!
 * \brief Convert string encoded in hex to bytes.
 *
 * \param input        Hex encoded input string.
 * \param output       Decoded bytes.
 * \param output_size  Size of the output.
 *
 * \return Error code, KNOT_EOK if successful.
 */
int hex_decode(const char *input, uint8_t **output, size_t *output_size);