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      1 /*
      2  * Copyright (c) 2022 Yubico AB. All rights reserved.
      3  * Use of this source code is governed by a BSD-style
      4  * license that can be found in the LICENSE file.
      5  * SPDX-License-Identifier: BSD-2-Clause
      6  */
      7 
      8 #include <errno.h>
      9 #include <stdint.h>
     10 #include <stdlib.h>
     11 
     12 #include "fido.h"
     13 
     14 int
     15 fido_to_uint64(const char *str, int base, uint64_t *out)
     16 {
     17 	char *ep;
     18 	unsigned long long ull;
     19 
     20 	errno = 0;
     21 	ull = strtoull(str, &ep, base);
     22 	if (str == ep || *ep != '\0')
     23 		return -1;
     24 	else if (ull == ULLONG_MAX && errno == ERANGE)
     25 		return -1;
     26 	else if (ull > UINT64_MAX)
     27 		return -1;
     28 	*out = (uint64_t)ull;
     29 
     30 	return 0;
     31 }
     32