1135446Strhodes/* 2262706Serwin * Copyright (C) 2004, 2005, 2007, 2014 Internet Systems Consortium, Inc. ("ISC") 3135446Strhodes * Copyright (C) 2003 Internet Software Consortium. 4135446Strhodes * 5193149Sdougb * Permission to use, copy, modify, and/or distribute this software for any 6135446Strhodes * purpose with or without fee is hereby granted, provided that the above 7135446Strhodes * copyright notice and this permission notice appear in all copies. 8135446Strhodes * 9135446Strhodes * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10135446Strhodes * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11135446Strhodes * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12135446Strhodes * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13135446Strhodes * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14135446Strhodes * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15135446Strhodes * PERFORMANCE OF THIS SOFTWARE. 16135446Strhodes */ 17135446Strhodes 18135446Strhodes/* 19135446Strhodes * Copyright (c) 1990, 1993 20135446Strhodes * The Regents of the University of California. All rights reserved. 21135446Strhodes * 22135446Strhodes * Redistribution and use in source and binary forms, with or without 23135446Strhodes * modification, are permitted provided that the following conditions 24135446Strhodes * are met: 25135446Strhodes * 1. Redistributions of source code must retain the above copyright 26135446Strhodes * notice, this list of conditions and the following disclaimer. 27135446Strhodes * 2. Redistributions in binary form must reproduce the above copyright 28135446Strhodes * notice, this list of conditions and the following disclaimer in the 29135446Strhodes * documentation and/or other materials provided with the distribution. 30262706Serwin * 3. Neither the name of the University nor the names of its contributors 31135446Strhodes * may be used to endorse or promote products derived from this software 32135446Strhodes * without specific prior written permission. 33135446Strhodes * 34135446Strhodes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35135446Strhodes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36135446Strhodes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37135446Strhodes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38135446Strhodes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39135446Strhodes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40135446Strhodes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41135446Strhodes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42135446Strhodes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43135446Strhodes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44135446Strhodes * SUCH DAMAGE. 45135446Strhodes */ 46135446Strhodes 47170222Sdougb/*! \file */ 48135446Strhodes#if defined(LIBC_SCCS) && !defined(lint) 49135446Strhodesstatic char sccsid[] = "@(#)strtoul.c 8.1 (Berkeley) 6/4/93"; 50135446Strhodes#endif /* LIBC_SCCS and not lint */ 51135446Strhodes 52234010Sdougb/* $Id: strtoul.c,v 1.7 2007/06/19 23:47:17 tbox Exp $ */ 53135446Strhodes 54135446Strhodes#include <config.h> 55135446Strhodes 56135446Strhodes#include <limits.h> 57135446Strhodes#include <ctype.h> 58135446Strhodes#include <errno.h> 59135446Strhodes 60135446Strhodes#include <isc/stdlib.h> 61135446Strhodes#include <isc/util.h> 62135446Strhodes 63170222Sdougb/*! 64135446Strhodes * Convert a string to an unsigned long integer. 65135446Strhodes * 66135446Strhodes * Ignores `locale' stuff. Assumes that the upper and lower case 67135446Strhodes * alphabets and digits are each contiguous. 68135446Strhodes */ 69135446Strhodesunsigned long 70135446Strhodesisc_strtoul(const char *nptr, char **endptr, int base) { 71135446Strhodes const char *s = nptr; 72135446Strhodes unsigned long acc; 73135446Strhodes unsigned char c; 74135446Strhodes unsigned long cutoff; 75135446Strhodes int neg = 0, any, cutlim; 76135446Strhodes 77135446Strhodes /* 78135446Strhodes * See strtol for comments as to the logic used. 79135446Strhodes */ 80135446Strhodes do { 81135446Strhodes c = *s++; 82135446Strhodes } while (isspace(c)); 83135446Strhodes if (c == '-') { 84135446Strhodes neg = 1; 85135446Strhodes c = *s++; 86135446Strhodes } else if (c == '+') 87135446Strhodes c = *s++; 88135446Strhodes if ((base == 0 || base == 16) && 89135446Strhodes c == '0' && (*s == 'x' || *s == 'X')) { 90135446Strhodes c = s[1]; 91135446Strhodes s += 2; 92135446Strhodes base = 16; 93135446Strhodes } 94135446Strhodes if (base == 0) 95135446Strhodes base = c == '0' ? 8 : 10; 96135446Strhodes cutoff = (unsigned long)ULONG_MAX / (unsigned long)base; 97135446Strhodes cutlim = (unsigned long)ULONG_MAX % (unsigned long)base; 98135446Strhodes for (acc = 0, any = 0;; c = *s++) { 99135446Strhodes if (!isascii(c)) 100135446Strhodes break; 101135446Strhodes if (isdigit(c)) 102135446Strhodes c -= '0'; 103135446Strhodes else if (isalpha(c)) 104135446Strhodes c -= isupper(c) ? 'A' - 10 : 'a' - 10; 105135446Strhodes else 106135446Strhodes break; 107135446Strhodes if (c >= base) 108135446Strhodes break; 109135446Strhodes if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 110135446Strhodes any = -1; 111135446Strhodes else { 112135446Strhodes any = 1; 113135446Strhodes acc *= base; 114135446Strhodes acc += c; 115135446Strhodes } 116135446Strhodes } 117135446Strhodes if (any < 0) { 118135446Strhodes acc = ULONG_MAX; 119135446Strhodes errno = ERANGE; 120135446Strhodes } else if (neg) 121135446Strhodes acc = -acc; 122135446Strhodes if (endptr != 0) 123135446Strhodes DE_CONST(any ? s - 1 : nptr, *endptr); 124135446Strhodes return (acc); 125135446Strhodes} 126