1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #if defined(_KERNEL) 31 #include <sys/null.h> 32 #endif /* _KERNEL */ 33 34 #if defined(_KERNEL) && !defined(_BOOT) 35 #include <sys/errno.h> 36 #else /* _KERNEL && !_BOOT */ 37 #if !defined(_BOOT) && !defined(_KMDB) && !defined(_STANDALONE) 38 #include "lint.h" 39 #endif /* !_BOOT && !_KMDB && !_STANDALONE */ 40 #if defined(_STANDALONE) 41 #include <sys/cdefs.h> 42 #include <stand.h> 43 #include <limits.h> 44 #else 45 #include <errno.h> 46 #include <ctype.h> 47 #include <limits.h> 48 #include <stdlib.h> 49 #endif /* _STANDALONE */ 50 #endif /* _KERNEL && !_BOOT */ 51 #include "strtolctype.h" 52 #include <sys/types.h> 53 54 #if defined(_KERNEL) && !defined(_BOOT) 55 int 56 ddi_strtoul(const char *str, char **nptr, int base, unsigned long *result) 57 #else /* _KERNEL && !_BOOT */ 58 unsigned long 59 strtoul(const char *str, char **nptr, int base) 60 #endif /* _KERNEL && !_BOOT */ 61 { 62 unsigned long val; 63 int c; 64 int xx; 65 int neg = 0; 66 unsigned long multmax; 67 const char **ptr = (const char **)nptr; 68 const unsigned char *ustr = (const unsigned char *)str; 69 70 if (ptr != NULL) 71 *ptr = (char *)ustr; /* in case no number is formed */ 72 if (base < 0 || base > MBASE || base == 1) { 73 /* base is invalid -- should be a fatal error */ 74 #if defined(_KERNEL) && !defined(_BOOT) 75 return (EINVAL); 76 #else /* _KERNEL && !_BOOT */ 77 errno = EINVAL; 78 return (0); 79 #endif /* _KERNEL && !_BOOT */ 80 } 81 if (!isalnum(c = *ustr)) { 82 while (isspace(c)) 83 c = *++ustr; 84 switch (c) { 85 case '-': 86 neg++; 87 /* FALLTHROUGH */ 88 case '+': 89 c = *++ustr; 90 } 91 } 92 if (base == 0) { 93 if (c != '0') 94 base = 10; 95 else if (ustr[1] == 'x' || ustr[1] == 'X') 96 base = 16; 97 else 98 base = 8; 99 } 100 /* 101 * for any base > 10, the digits incrementally following 102 * 9 are assumed to be "abc...z" or "ABC...Z" 103 */ 104 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { 105 /* no number formed */ 106 #if defined(_KERNEL) && !defined(_BOOT) 107 return (EINVAL); 108 #else /* _KERNEL && !_BOOT */ 109 return (0); 110 #endif /* _KERNEL && !_BOOT */ 111 } 112 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 113 isxdigit(ustr[2])) 114 c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 115 116 multmax = ULONG_MAX / (unsigned long)base; 117 val = DIGIT(c); 118 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 119 if (val > multmax) 120 goto overflow; 121 val *= base; 122 if (ULONG_MAX - val < (unsigned long)xx) 123 goto overflow; 124 val += xx; 125 c = *++ustr; 126 } 127 if (ptr != NULL) 128 *ptr = (char *)ustr; 129 #if defined(_KERNEL) && !defined(_BOOT) 130 *result = neg ? -val : val; 131 return (0); 132 #else /* _KERNEL && !_BOOT */ 133 return (neg ? -val : val); 134 #endif /* _KERNEL && !_BOOT */ 135 136 overflow: 137 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 138 ; 139 if (ptr != NULL) 140 *ptr = (char *)ustr; 141 #if defined(_KERNEL) && !defined(_BOOT) 142 return (ERANGE); 143 #else /* _KERNEL && !_BOOT */ 144 errno = ERANGE; 145 return (ULONG_MAX); 146 #endif /* _KERNEL && !_BOOT */ 147 } 148