/*

 * Copyright (c) 2022 Yubico AB. All rights reserved.

 * Use of this source code is governed by a BSD-style

 * license that can be found in the LICENSE file.

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include <errno.h>

#include <stdint.h>

#include <stdlib.h>

#include "fido.h"

int

fido_to_uint64(const char *str, int base, uint64_t *out)

{

        char *ep;

        unsigned long long ull;

        errno = 0;

        ull = strtoull(str, &ep, base);

        if (str == ep || *ep != '\0')

                return -1;

        else if (ull == ULLONG_MAX && errno == ERANGE)

                return -1;

        else if (ull > UINT64_MAX)

                return -1;

        *out = (uint64_t)ull;

        return 0;

}