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