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| 2 | |
| 3 | * stdlib functions
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| 4 | *
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| 5 | * Author: Scott Wood <[email protected]>
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| 6 | *
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| 7 | * Copyright (c) 2007 Freescale Semiconductor, Inc.
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| 8 |
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| 9 |
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| 10 | #include "stdlib.h"
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| 11 |
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| 12 |
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| 13 | unsigned long long int strtoull(const char *ptr, char **end, int base)
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| 14 | {
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| 15 | unsigned long long ret = 0;
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| 16 |
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| 17 | if (base > 36)
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| 18 | goto out;
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| 19 |
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| 20 | while (*ptr) {
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| 21 | int digit;
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| 22 |
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| 23 | if (*ptr >= '0' && *ptr <= '9' && *ptr < '0' + base)
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| 24 | digit = *ptr - '0';
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| 25 | else if (*ptr >= 'A' && *ptr < 'A' + base - 10)
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| 26 | digit = *ptr - 'A' + 10;
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| 27 | else if (*ptr >= 'a' && *ptr < 'a' + base - 10)
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| 28 | digit = *ptr - 'a' + 10;
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| 29 | else
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| 30 | break;
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| 31 |
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| 32 | ret *= base;
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| 33 | ret += digit;
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| 34 | ptr++;
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| 35 | }
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| 36 |
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| 37 | out:
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| 38 | if (end)
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| 39 | *end = (char *)ptr;
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| 40 |
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| 41 | return ret;
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| 42 | }
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