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 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 /* 27 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 /* Copyright (c) 1988 AT&T */ 32 /* All Rights Reserved */ 33 34 #if defined(_KERNEL) 35 #include <sys/null.h> 36 #endif /* _KERNEL */ 37 38 #if defined(_KERNEL) && !defined(_BOOT) 39 #include <sys/errno.h> 40 #else /* _KERNEL && !_BOOT */ 41 #if !defined(_BOOT) && !defined(_KMDB) && !defined(_STANDALONE) 42 #include "lint.h" 43 #endif /* !_BOOT && !_KMDB && !_STANDALONE */ 44 #if defined(_STANDALONE) 45 #include <sys/cdefs.h> 46 #include <stand.h> 47 #include <limits.h> 48 #else 49 #include <errno.h> 50 #include <ctype.h> 51 #include <limits.h> 52 #include <stdlib.h> 53 #endif /* _STANDALONE */ 54 #endif /* _KERNEL && !_BOOT */ 55 #include "strtolctype.h" 56 #include <sys/types.h> 57 58 #if defined(_KERNEL) && !defined(_BOOT) 59 int 60 ddi_strtol(const char *str, char **nptr, int base, long *result) 61 #else /* _KERNEL && !_BOOT */ 62 long 63 strtol(const char *str, char **nptr, int base) 64 #endif /* _KERNEL && !_BOOT */ 65 { 66 long val; 67 int c; 68 int xx; 69 int neg = 0; 70 long multmin; 71 long limit; 72 const char **ptr = (const char **)nptr; 73 const unsigned char *ustr = (const unsigned char *)str; 74 75 if (ptr != NULL) 76 *ptr = (char *)ustr; /* in case no number is formed */ 77 if (base < 0 || base > MBASE || base == 1) { 78 /* base is invalid -- should be a fatal error */ 79 #if defined(_KERNEL) && !defined(_BOOT) 80 return (EINVAL); 81 #else /* _KERNEL && !_BOOT */ 82 errno = EINVAL; 83 return (0); 84 #endif /* _KERNEL && !_BOOT */ 85 } 86 if (!isalnum(c = *ustr)) { 87 while (isspace(c)) 88 c = *++ustr; 89 switch (c) { 90 case '-': 91 neg++; 92 /* FALLTHROUGH */ 93 case '+': 94 c = *++ustr; 95 } 96 } 97 if (base == 0) { 98 if (c != '0') 99 base = 10; 100 else if (ustr[1] == 'x' || ustr[1] == 'X') 101 base = 16; 102 else 103 base = 8; 104 } 105 /* 106 * for any base > 10, the digits incrementally following 107 * 9 are assumed to be "abc...z" or "ABC...Z" 108 */ 109 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { 110 /* no number formed */ 111 #if defined(_KERNEL) && !defined(_BOOT) 112 return (EINVAL); 113 #else /* _KERNEL && !_BOOT */ 114 errno = EINVAL; 115 return (0); 116 #endif /* _KERNEL && !_BOOT */ 117 } 118 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 119 isxdigit(ustr[2])) 120 c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 121 122 /* this code assumes that abs(LONG_MIN) >= abs(LONG_MAX) */ 123 if (neg) 124 limit = LONG_MIN; 125 else 126 limit = -LONG_MAX; 127 multmin = limit / (long)base; 128 val = -DIGIT(c); 129 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 130 /* accumulate neg avoids surprises near LONG_MAX */ 131 if (val < multmin) 132 goto overflow; 133 val *= base; 134 if (val < limit + xx) 135 goto overflow; 136 val -= xx; 137 c = *++ustr; 138 } 139 if (ptr != NULL) 140 *ptr = (char *)ustr; 141 #if defined(_KERNEL) && !defined(_BOOT) 142 *result = neg ? val : -val; 143 return (0); 144 #else /* _KERNEL && !_BOOT */ 145 return (neg ? val : -val); 146 #endif /* _KERNEL && !_BOOT */ 147 148 overflow: 149 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 150 ; 151 if (ptr != NULL) 152 *ptr = (char *)ustr; 153 #if defined(_KERNEL) && !defined(_BOOT) 154 return (ERANGE); 155 #else /* _KERNEL && !_BOOT */ 156 errno = ERANGE; 157 return (neg ? LONG_MIN : LONG_MAX); 158 #endif /* _KERNEL && !_BOOT */ 159 } 160