1*9de78277SScott Wood /* 2*9de78277SScott Wood * stdlib functions 3*9de78277SScott Wood * 4*9de78277SScott Wood * Author: Scott Wood <[email protected]> 5*9de78277SScott Wood * 6*9de78277SScott Wood * Copyright (c) 2007 Freescale Semiconductor, Inc. 7*9de78277SScott Wood * 8*9de78277SScott Wood * This program is free software; you can redistribute it and/or modify it 9*9de78277SScott Wood * under the terms of the GNU General Public License version 2 as published 10*9de78277SScott Wood * by the Free Software Foundation. 11*9de78277SScott Wood */ 12*9de78277SScott Wood 13*9de78277SScott Wood #include "stdlib.h" 14*9de78277SScott Wood 15*9de78277SScott Wood /* Not currently supported: leading whitespace, sign, 0x prefix, zero base */ 16*9de78277SScott Wood unsigned long long int strtoull(const char *ptr, char **end, int base) 17*9de78277SScott Wood { 18*9de78277SScott Wood unsigned long long ret = 0; 19*9de78277SScott Wood 20*9de78277SScott Wood if (base > 36) 21*9de78277SScott Wood goto out; 22*9de78277SScott Wood 23*9de78277SScott Wood while (*ptr) { 24*9de78277SScott Wood int digit; 25*9de78277SScott Wood 26*9de78277SScott Wood if (*ptr >= '0' && *ptr <= '9' && *ptr < '0' + base) 27*9de78277SScott Wood digit = *ptr - '0'; 28*9de78277SScott Wood else if (*ptr >= 'A' && *ptr < 'A' + base - 10) 29*9de78277SScott Wood digit = *ptr - 'A' + 10; 30*9de78277SScott Wood else if (*ptr >= 'a' && *ptr < 'a' + base - 10) 31*9de78277SScott Wood digit = *ptr - 'a' + 10; 32*9de78277SScott Wood else 33*9de78277SScott Wood break; 34*9de78277SScott Wood 35*9de78277SScott Wood ret *= base; 36*9de78277SScott Wood ret += digit; 37*9de78277SScott Wood ptr++; 38*9de78277SScott Wood } 39*9de78277SScott Wood 40*9de78277SScott Wood out: 41*9de78277SScott Wood if (end) 42*9de78277SScott Wood *end = (char *)ptr; 43*9de78277SScott Wood 44*9de78277SScott Wood return ret; 45*9de78277SScott Wood } 46