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) && !defined(_BOOT) 35 #include <sys/errno.h> 36 #else /* _KERNEL && !_BOOT */ 37 #if !defined(_BOOT) && !defined(_KMDB) 38 #include "lint.h" 39 #endif /* !_BOOT && !_KMDB */ 40 #include <errno.h> 41 #include <ctype.h> 42 #include <limits.h> 43 #include <stdlib.h> 44 #endif /* _KERNEL && !_BOOT */ 45 #include "strtolctype.h" 46 #include <sys/types.h> 47 48 #if defined(_KERNEL) && !defined(_BOOT) 49 int 50 ddi_strtol(const char *str, char **nptr, int base, long *result) 51 #else /* _KERNEL && !_BOOT */ 52 long 53 strtol(const char *str, char **nptr, int base) 54 #endif /* _KERNEL && !_BOOT */ 55 { 56 long val; 57 int c; 58 int xx; 59 int neg = 0; 60 long multmin; 61 long limit; 62 const char **ptr = (const char **)nptr; 63 const unsigned char *ustr = (const unsigned char *)str; 64 65 if (ptr != (const char **)0) 66 *ptr = (char *)ustr; /* in case no number is formed */ 67 if (base < 0 || base > MBASE || base == 1) { 68 /* base is invalid -- should be a fatal error */ 69 #if defined(_KERNEL) && !defined(_BOOT) 70 return (EINVAL); 71 #else /* _KERNEL && !_BOOT */ 72 errno = EINVAL; 73 return (0); 74 #endif /* _KERNEL && !_BOOT */ 75 } 76 if (!isalnum(c = *ustr)) { 77 while (isspace(c)) 78 c = *++ustr; 79 switch (c) { 80 case '-': 81 neg++; 82 /* FALLTHROUGH */ 83 case '+': 84 c = *++ustr; 85 } 86 } 87 if (base == 0) 88 if (c != '0') 89 base = 10; 90 else if (ustr[1] == 'x' || ustr[1] == 'X') 91 base = 16; 92 else 93 base = 8; 94 /* 95 * for any base > 10, the digits incrementally following 96 * 9 are assumed to be "abc...z" or "ABC...Z" 97 */ 98 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { 99 /* no number formed */ 100 #if defined(_KERNEL) && !defined(_BOOT) 101 return (EINVAL); 102 #else /* _KERNEL && !_BOOT */ 103 errno = EINVAL; 104 return (0); 105 #endif /* _KERNEL && !_BOOT */ 106 } 107 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 108 isxdigit(ustr[2])) 109 c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 110 111 /* this code assumes that abs(LONG_MIN) >= abs(LONG_MAX) */ 112 if (neg) 113 limit = LONG_MIN; 114 else 115 limit = -LONG_MAX; 116 multmin = limit / (long)base; 117 val = -DIGIT(c); 118 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 119 /* accumulate neg avoids surprises near LONG_MAX */ 120 if (val < multmin) 121 goto overflow; 122 val *= base; 123 if (val < limit + xx) 124 goto overflow; 125 val -= xx; 126 c = *++ustr; 127 } 128 if (ptr != (const char **)0) 129 *ptr = (char *)ustr; 130 #if defined(_KERNEL) && !defined(_BOOT) 131 *result = neg ? val : -val; 132 return (0); 133 #else /* _KERNEL && !_BOOT */ 134 return (neg ? val : -val); 135 #endif /* _KERNEL && !_BOOT */ 136 137 overflow: 138 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 139 ; 140 if (ptr != (const char **)0) 141 *ptr = (char *)ustr; 142 #if defined(_KERNEL) && !defined(_BOOT) 143 return (ERANGE); 144 #else /* _KERNEL && !_BOOT */ 145 errno = ERANGE; 146 return (neg ? LONG_MIN : LONG_MAX); 147 #endif /* _KERNEL && !_BOOT */ 148 } 149