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) && !defined(_BOOT) 31 #include <sys/errno.h> 32 #else /* _KERNEL && !_BOOT */ 33 #if !defined(_BOOT) && !defined(_KMDB) 34 #include "lint.h" 35 #endif /* !_BOOT && !_KMDB */ 36 #include <errno.h> 37 #include <ctype.h> 38 #include <limits.h> 39 #include <stdlib.h> 40 #endif /* _KERNEL && !_BOOT */ 41 #include "strtolctype.h" 42 #include <sys/types.h> 43 44 #if defined(_KERNEL) && !defined(_BOOT) 45 int 46 ddi_strtol(const char *str, char **nptr, int base, long *result) 47 #else /* _KERNEL && !_BOOT */ 48 long 49 strtol(const char *str, char **nptr, int base) 50 #endif /* _KERNEL && !_BOOT */ 51 { 52 long val; 53 int c; 54 int xx; 55 int neg = 0; 56 long multmin; 57 long limit; 58 const char **ptr = (const char **)nptr; 59 const unsigned char *ustr = (const unsigned char *)str; 60 61 if (ptr != (const char **)0) 62 *ptr = (char *)ustr; /* in case no number is formed */ 63 if (base < 0 || base > MBASE || base == 1) { 64 /* base is invalid -- should be a fatal error */ 65 #if defined(_KERNEL) && !defined(_BOOT) 66 return (EINVAL); 67 #else /* _KERNEL && !_BOOT */ 68 errno = EINVAL; 69 return (0); 70 #endif /* _KERNEL && !_BOOT */ 71 } 72 if (!isalnum(c = *ustr)) { 73 while (isspace(c)) 74 c = *++ustr; 75 switch (c) { 76 case '-': 77 neg++; 78 /* FALLTHROUGH */ 79 case '+': 80 c = *++ustr; 81 } 82 } 83 if (base == 0) 84 if (c != '0') 85 base = 10; 86 else if (ustr[1] == 'x' || ustr[1] == 'X') 87 base = 16; 88 else 89 base = 8; 90 /* 91 * for any base > 10, the digits incrementally following 92 * 9 are assumed to be "abc...z" or "ABC...Z" 93 */ 94 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { 95 /* no number formed */ 96 #if defined(_KERNEL) && !defined(_BOOT) 97 return (EINVAL); 98 #else /* _KERNEL && !_BOOT */ 99 return (0); 100 #endif /* _KERNEL && !_BOOT */ 101 } 102 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 103 isxdigit(ustr[2])) 104 c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 105 106 /* this code assumes that abs(LONG_MIN) >= abs(LONG_MAX) */ 107 if (neg) 108 limit = LONG_MIN; 109 else 110 limit = -LONG_MAX; 111 multmin = limit / (long)base; 112 val = -DIGIT(c); 113 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 114 /* accumulate neg avoids surprises near LONG_MAX */ 115 if (val < multmin) 116 goto overflow; 117 val *= base; 118 if (val < limit + xx) 119 goto overflow; 120 val -= xx; 121 c = *++ustr; 122 } 123 if (ptr != (const char **)0) 124 *ptr = (char *)ustr; 125 #if defined(_KERNEL) && !defined(_BOOT) 126 *result = neg ? val : -val; 127 return (0); 128 #else /* _KERNEL && !_BOOT */ 129 return (neg ? val : -val); 130 #endif /* _KERNEL && !_BOOT */ 131 132 overflow: 133 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 134 ; 135 if (ptr != (const char **)0) 136 *ptr = (char *)ustr; 137 #if defined(_KERNEL) && !defined(_BOOT) 138 return (ERANGE); 139 #else /* _KERNEL && !_BOOT */ 140 errno = ERANGE; 141 return (neg ? LONG_MIN : LONG_MAX); 142 #endif /* _KERNEL && !_BOOT */ 143 } 144