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| // SPDX-License-Identifier: GPL-2.0-only
| /*
| * stdlib functions
| *
| * Author: Scott Wood <scottwood@freescale.com>
| *
| * Copyright (c) 2007 Freescale Semiconductor, Inc.
| */
|
| #include "stdlib.h"
|
| /* Not currently supported: leading whitespace, sign, 0x prefix, zero base */
| unsigned long long int strtoull(const char *ptr, char **end, int base)
| {
| unsigned long long ret = 0;
|
| if (base > 36)
| goto out;
|
| while (*ptr) {
| int digit;
|
| if (*ptr >= '0' && *ptr <= '9' && *ptr < '0' + base)
| digit = *ptr - '0';
| else if (*ptr >= 'A' && *ptr < 'A' + base - 10)
| digit = *ptr - 'A' + 10;
| else if (*ptr >= 'a' && *ptr < 'a' + base - 10)
| digit = *ptr - 'a' + 10;
| else
| break;
|
| ret *= base;
| ret += digit;
| ptr++;
| }
|
| out:
| if (end)
| *end = (char *)ptr;
|
| return ret;
| }
|
|
