5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
43 lines
785 B
C
43 lines
785 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* stdlib functions
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*
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* Author: Scott Wood <scottwood@freescale.com>
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*
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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*/
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#include "stdlib.h"
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/* Not currently supported: leading whitespace, sign, 0x prefix, zero base */
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unsigned long long int strtoull(const char *ptr, char **end, int base)
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{
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unsigned long long ret = 0;
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if (base > 36)
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goto out;
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while (*ptr) {
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int digit;
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if (*ptr >= '0' && *ptr <= '9' && *ptr < '0' + base)
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digit = *ptr - '0';
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else if (*ptr >= 'A' && *ptr < 'A' + base - 10)
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digit = *ptr - 'A' + 10;
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else if (*ptr >= 'a' && *ptr < 'a' + base - 10)
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digit = *ptr - 'a' + 10;
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else
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break;
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ret *= base;
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ret += digit;
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ptr++;
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}
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out:
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if (end)
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*end = (char *)ptr;
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return ret;
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}
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