1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * stdlib functions
4 *
5 * Author: Scott Wood <scottwood@freescale.com>
6 *
7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
8 */
9
10 #include "stdlib.h"
11
12 /* Not currently supported: leading whitespace, sign, 0x prefix, zero base */
13 unsigned long long int strtoull(const char *ptr, char **end, int base)
14 {
15 unsigned long long ret = 0;
16
17 if (base > 36)
18 goto out;
19
20 while (*ptr) {
21 int digit;
22
23 if (*ptr >= '' && *ptr <= '9' && *ptr < '' + base)
24 digit = *ptr - '';
25 else if (*ptr >= 'A' && *ptr < 'A' + base - 10)
26 digit = *ptr - 'A' + 10;
27 else if (*ptr >= 'a' && *ptr < 'a' + base - 10)
28 digit = *ptr - 'a' + 10;
29 else
30 break;
31
32 ret *= base;
33 ret += digit;
34 ptr++;
35 }
36
37 out:
38 if (end)
39 *end = (char *)ptr;
40
41 return ret;
42 }
43
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.