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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * stdlib functions
- *
- * Author: Scott Wood <[email protected]>
- *
- * 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;
- }
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