46 строки
934 B
C
46 строки
934 B
C
|
/*
|
||
|
|
* stdlib functions
|
||
|
|
*
|
||
|
|
* Author: Scott Wood <scottwood@freescale.com>
|
||
|
|
*
|
||
|
|
* Copyright (c) 2007 Freescale Semiconductor, Inc.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 as published
|
||
|
|
* by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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;
|
||
|
|
}
|