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
ddi_strtol(const char * str,char ** nptr,int base,long * result)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