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_strtoul(const char *str, char **nptr, int base, unsigned long *result) 47 #else /* _KERNEL && !_BOOT */ 48 unsigned long 49 strtoul(const char *str, char **nptr, int base) 50 #endif /* _KERNEL && !_BOOT */ 51 { 52 unsigned long val; 53 int c; 54 int xx; 55 int neg = 0; 56 unsigned long multmax; 57 const char **ptr = (const char **)nptr; 58 const unsigned char *ustr = (const unsigned char *)str; 59 60 if (ptr != (const char **)0) 61 *ptr = (char *)ustr; /* in case no number is formed */ 62 if (base < 0 || base > MBASE || base == 1) { 63 /* base is invalid -- should be a fatal error */ 64 #if defined(_KERNEL) && !defined(_BOOT) 65 return (EINVAL); 66 #else /* _KERNEL && !_BOOT */ 67 errno = EINVAL; 68 return (0); 69 #endif /* _KERNEL && !_BOOT */ 70 } 71 if (!isalnum(c = *ustr)) { 72 while (isspace(c)) 73 c = *++ustr; 74 switch (c) { 75 case '-': 76 neg++; 77 /* FALLTHROUGH */ 78 case '+': 79 c = *++ustr; 80 } 81 } 82 if (base == 0) 83 if (c != '0') 84 base = 10; 85 else if (ustr[1] == 'x' || ustr[1] == 'X') 86 base = 16; 87 else 88 base = 8; 89 /* 90 * for any base > 10, the digits incrementally following 91 * 9 are assumed to be "abc...z" or "ABC...Z" 92 */ 93 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) { 94 /* no number formed */ 95 #if defined(_KERNEL) && !defined(_BOOT) 96 return (EINVAL); 97 #else /* _KERNEL && !_BOOT */ 98 return (0); 99 #endif /* _KERNEL && !_BOOT */ 100 } 101 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && 102 isxdigit(ustr[2])) 103 c = *(ustr += 2); /* skip over leading "0x" or "0X" */ 104 105 multmax = ULONG_MAX / (unsigned long)base; 106 val = DIGIT(c); 107 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { 108 if (val > multmax) 109 goto overflow; 110 val *= base; 111 if (ULONG_MAX - val < xx) 112 goto overflow; 113 val += xx; 114 c = *++ustr; 115 } 116 if (ptr != (const char **)0) 117 *ptr = (char *)ustr; 118 #if defined(_KERNEL) && !defined(_BOOT) 119 *result = neg ? -val : val; 120 return (0); 121 #else /* _KERNEL && !_BOOT */ 122 return (neg ? -val : val); 123 #endif /* _KERNEL && !_BOOT */ 124 125 overflow: 126 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) 127 ; 128 if (ptr != (const char **)0) 129 *ptr = (char *)ustr; 130 #if defined(_KERNEL) && !defined(_BOOT) 131 return (ERANGE); 132 #else /* _KERNEL && !_BOOT */ 133 errno = ERANGE; 134 return (ULONG_MAX); 135 #endif /* _KERNEL && !_BOOT */ 136 } 137