1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 24*7c478bd9Sstevel@tonic-gate 25*7c478bd9Sstevel@tonic-gate 26*7c478bd9Sstevel@tonic-gate /* 27*7c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 28*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 29*7c478bd9Sstevel@tonic-gate */ 30*7c478bd9Sstevel@tonic-gate 31*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.8 */ 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate #if !defined(_BOOT) && !defined(_KMDB) 34*7c478bd9Sstevel@tonic-gate #include "synonyms.h" 35*7c478bd9Sstevel@tonic-gate #endif /* !_BOOT && !_KMDB */ 36*7c478bd9Sstevel@tonic-gate #include <errno.h> 37*7c478bd9Sstevel@tonic-gate #include <ctype.h> 38*7c478bd9Sstevel@tonic-gate #include <limits.h> 39*7c478bd9Sstevel@tonic-gate #include <stdlib.h> 40*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate #define DIGIT(x) \ 43*7c478bd9Sstevel@tonic-gate (isdigit(x) ? (x) - '0' : islower(x) ? (x) + 10 - 'a' : (x) + 10 - 'A') 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate #define MBASE ('z' - 'a' + 1 + 10) 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate /* 48*7c478bd9Sstevel@tonic-gate * The following macro is a local version of isalnum() which limits 49*7c478bd9Sstevel@tonic-gate * alphabetic characters to the ranges a-z and A-Z; locale dependent 50*7c478bd9Sstevel@tonic-gate * characters will not return 1. The members of a-z and A-Z are 51*7c478bd9Sstevel@tonic-gate * assumed to be in ascending order and contiguous 52*7c478bd9Sstevel@tonic-gate */ 53*7c478bd9Sstevel@tonic-gate #define lisalnum(x) \ 54*7c478bd9Sstevel@tonic-gate (isdigit(x) || ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z')) 55*7c478bd9Sstevel@tonic-gate 56*7c478bd9Sstevel@tonic-gate unsigned long 57*7c478bd9Sstevel@tonic-gate strtoul(const char *str, char **nptr, int base) 58*7c478bd9Sstevel@tonic-gate { 59*7c478bd9Sstevel@tonic-gate unsigned long val; 60*7c478bd9Sstevel@tonic-gate int c; 61*7c478bd9Sstevel@tonic-gate int xx; 62*7c478bd9Sstevel@tonic-gate unsigned long multmax; 63*7c478bd9Sstevel@tonic-gate int neg = 0; 64*7c478bd9Sstevel@tonic-gate const char **ptr = (const char **)nptr; 65*7c478bd9Sstevel@tonic-gate const unsigned char *ustr = (const unsigned char *)str; 66*7c478bd9Sstevel@tonic-gate 67*7c478bd9Sstevel@tonic-gate if (ptr != (const char **)0) 68*7c478bd9Sstevel@tonic-gate *ptr = (char *)ustr; /* in case no number is formed */ 69*7c478bd9Sstevel@tonic-gate if (base < 0 || base > MBASE || base == 1) { 70*7c478bd9Sstevel@tonic-gate errno = EINVAL; 71*7c478bd9Sstevel@tonic-gate return (0); /* base is invalid -- should be a fatal error */ 72*7c478bd9Sstevel@tonic-gate } 73*7c478bd9Sstevel@tonic-gate if (!isalnum(c = *ustr)) { 74*7c478bd9Sstevel@tonic-gate while (isspace(c)) 75*7c478bd9Sstevel@tonic-gate c = *++ustr; 76*7c478bd9Sstevel@tonic-gate switch (c) { 77*7c478bd9Sstevel@tonic-gate case '-': 78*7c478bd9Sstevel@tonic-gate neg++; 79*7c478bd9Sstevel@tonic-gate /* FALLTHROUGH */ 80*7c478bd9Sstevel@tonic-gate case '+': 81*7c478bd9Sstevel@tonic-gate c = *++ustr; 82*7c478bd9Sstevel@tonic-gate } 83*7c478bd9Sstevel@tonic-gate } 84*7c478bd9Sstevel@tonic-gate if (base == 0) 85*7c478bd9Sstevel@tonic-gate if (c != '0') 86*7c478bd9Sstevel@tonic-gate base = 10; 87*7c478bd9Sstevel@tonic-gate else if (ustr[1] == 'x' || ustr[1] == 'X') 88*7c478bd9Sstevel@tonic-gate base = 16; 89*7c478bd9Sstevel@tonic-gate else 90*7c478bd9Sstevel@tonic-gate base = 8; 91*7c478bd9Sstevel@tonic-gate /* 92*7c478bd9Sstevel@tonic-gate * for any base > 10, the digits incrementally following 93*7c478bd9Sstevel@tonic-gate * 9 are assumed to be "abc...z" or "ABC...Z" 94*7c478bd9Sstevel@tonic-gate */ 95*7c478bd9Sstevel@tonic-gate if (!lisalnum(c) || (xx = DIGIT(c)) >= base) 96*7c478bd9Sstevel@tonic-gate return (0); /* no number formed */ 97*7c478bd9Sstevel@tonic-gate if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 98*7c478bd9Sstevel@tonic-gate isxdigit(ustr[2])) 99*7c478bd9Sstevel@tonic-gate c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate multmax = ULONG_MAX / (unsigned long)base; 102*7c478bd9Sstevel@tonic-gate val = DIGIT(c); 103*7c478bd9Sstevel@tonic-gate for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 104*7c478bd9Sstevel@tonic-gate if (val > multmax) 105*7c478bd9Sstevel@tonic-gate goto overflow; 106*7c478bd9Sstevel@tonic-gate val *= base; 107*7c478bd9Sstevel@tonic-gate if (ULONG_MAX - val < xx) 108*7c478bd9Sstevel@tonic-gate goto overflow; 109*7c478bd9Sstevel@tonic-gate val += xx; 110*7c478bd9Sstevel@tonic-gate c = *++ustr; 111*7c478bd9Sstevel@tonic-gate } 112*7c478bd9Sstevel@tonic-gate if (ptr != (const char **)0) 113*7c478bd9Sstevel@tonic-gate *ptr = (char *)ustr; 114*7c478bd9Sstevel@tonic-gate return (neg ? -val : val); 115*7c478bd9Sstevel@tonic-gate 116*7c478bd9Sstevel@tonic-gate overflow: 117*7c478bd9Sstevel@tonic-gate for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 118*7c478bd9Sstevel@tonic-gate ; 119*7c478bd9Sstevel@tonic-gate if (ptr != (const char **)0) 120*7c478bd9Sstevel@tonic-gate *ptr = (char *)ustr; 121*7c478bd9Sstevel@tonic-gate errno = ERANGE; 122*7c478bd9Sstevel@tonic-gate return (ULONG_MAX); 123*7c478bd9Sstevel@tonic-gate } 124