strtoull.c revision 251672
1193323Sed/*- 2193323Sed * Copyright (c) 1992, 1993 3193323Sed * The Regents of the University of California. All rights reserved. 4193323Sed * 5193323Sed * Copyright (c) 2011 The FreeBSD Foundation 6193323Sed * All rights reserved. 7193323Sed * Portions of this software were developed by David Chisnall 8193323Sed * under sponsorship from the FreeBSD Foundation. 9193323Sed * 10193323Sed * Redistribution and use in source and binary forms, with or without 11193323Sed * modification, are permitted provided that the following conditions 12193323Sed * are met: 13193323Sed * 1. Redistributions of source code must retain the above copyright 14193323Sed * notice, this list of conditions and the following disclaimer. 15195340Sed * 2. Redistributions in binary form must reproduce the above copyright 16193323Sed * notice, this list of conditions and the following disclaimer in the 17193323Sed * documentation and/or other materials provided with the distribution. 18193323Sed * 3. Neither the name of the University nor the names of its contributors 19193323Sed * may be used to endorse or promote products derived from this software 20193323Sed * without specific prior written permission. 21193323Sed * 22193323Sed * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23193323Sed * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24193323Sed * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25193323Sed * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26193323Sed * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27193323Sed * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28193323Sed * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29198090Srdivacky * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30193323Sed * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31193323Sed * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32193323Sed * SUCH DAMAGE. 33193399Sed */ 34193323Sed 35193323Sed#if defined(LIBC_SCCS) && !defined(lint) 36193323Sedstatic char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93"; 37193323Sed#endif /* LIBC_SCCS and not lint */ 38193323Sed#include <sys/cdefs.h> 39193323Sed__FBSDID("$FreeBSD: head/lib/libc/stdlib/strtoull.c 251672 2013-06-13 00:19:30Z emaste $"); 40193323Sed 41193323Sed#include <limits.h> 42193323Sed#include <errno.h> 43193323Sed#include <ctype.h> 44193323Sed#include <stdlib.h> 45193323Sed#include "xlocale_private.h" 46193323Sed 47193323Sed/* 48193323Sed * Convert a string to an unsigned long long integer. 49193323Sed * 50193323Sed * Assumes that the upper and lower case 51198090Srdivacky * alphabets and digits are each contiguous. 52193323Sed */ 53193323Sedunsigned long long 54193323Sedstrtoull_l(const char * __restrict nptr, char ** __restrict endptr, int base, 55193323Sed locale_t locale) 56193323Sed{ 57193323Sed const char *s; 58193323Sed unsigned long long acc; 59198090Srdivacky char c; 60193323Sed unsigned long long cutoff; 61193323Sed int neg, any, cutlim; 62193323Sed FIX_LOCALE(locale); 63193323Sed 64193323Sed /* 65193323Sed * See strtoq for comments as to the logic used. 66193323Sed */ 67193323Sed s = nptr; 68193323Sed do { 69198113Srdivacky c = *s++; 70198090Srdivacky } while (isspace_l((unsigned char)c, locale)); 71198090Srdivacky if (c == '-') { 72193323Sed neg = 1; 73193323Sed c = *s++; 74193323Sed } else { 75193323Sed neg = 0; 76193323Sed if (c == '+') 77193323Sed c = *s++; 78193323Sed } 79193323Sed if ((base == 0 || base == 16) && 80193323Sed c == '0' && (*s == 'x' || *s == 'X') && 81193323Sed ((s[1] >= '0' && s[1] <= '9') || 82193323Sed (s[1] >= 'A' && s[1] <= 'F') || 83193323Sed (s[1] >= 'a' && s[1] <= 'f'))) { 84198090Srdivacky c = s[1]; 85198090Srdivacky s += 2; 86193323Sed base = 16; 87193323Sed } 88193323Sed if (base == 0) 89198090Srdivacky base = c == '0' ? 8 : 10; 90198090Srdivacky acc = any = 0; 91198090Srdivacky if (base < 2 || base > 36) 92198090Srdivacky goto noconv; 93198090Srdivacky 94193323Sed cutoff = ULLONG_MAX / base; 95193323Sed cutlim = ULLONG_MAX % base; 96193323Sed for ( ; ; c = *s++) { 97198090Srdivacky if (c >= '0' && c <= '9') 98198090Srdivacky c -= '0'; 99198090Srdivacky else if (c >= 'A' && c <= 'Z') 100198090Srdivacky c -= 'A' - 10; 101193323Sed else if (c >= 'a' && c <= 'z') 102193323Sed c -= 'a' - 10; 103193323Sed else 104193323Sed break; 105193323Sed if (c >= base) 106193323Sed break; 107193323Sed if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 108193323Sed any = -1; 109193323Sed else { 110193323Sed any = 1; 111193323Sed acc *= base; 112193323Sed acc += c; 113193323Sed } 114198090Srdivacky } 115198090Srdivacky if (any < 0) { 116193323Sed acc = ULLONG_MAX; 117193323Sed errno = ERANGE; 118193323Sed } else if (!any) { 119193323Sednoconv: 120193323Sed errno = EINVAL; 121193323Sed } else if (neg) 122193323Sed acc = -acc; 123193323Sed if (endptr != NULL) 124193323Sed *endptr = (char *)(any ? s - 1 : nptr); 125193323Sed return (acc); 126193323Sed} 127193323Sedunsigned long long 128193323Sedstrtoull(const char * __restrict nptr, char ** __restrict endptr, int base) 129193323Sed{ 130198396Srdivacky return strtoull_l(nptr, endptr, base, __get_locale()); 131198396Srdivacky} 132198396Srdivacky