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)
31 #include <sys/null.h>
32 #endif /* _KERNEL */
33
34 #if defined(_KERNEL) && !defined(_BOOT)
35 #include <sys/errno.h>
36 #else /* _KERNEL && !_BOOT */
37 #if !defined(_BOOT) && !defined(_KMDB) && !defined(_STANDALONE)
38 #include "lint.h"
39 #endif /* !_BOOT && !_KMDB && !_STANDALONE */
40 #if defined(_STANDALONE)
41 #include <sys/cdefs.h>
42 #include <stand.h>
43 #include <limits.h>
44
45 typedef unsigned long long u_longlong_t;
46 #else
47 #include <errno.h>
48 #include <ctype.h>
49 #include <limits.h>
50 #include <stdlib.h>
51 #endif /* _STANDALONE */
52 #endif /* _KERNEL && !_BOOT */
53 #include "strtolctype.h"
54 #include <sys/types.h>
55
56 #if defined(_KERNEL) && !defined(_BOOT)
57 int
ddi_strtoull(const char * str,char ** nptr,int base,u_longlong_t * result)58 ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result)
59 #else /* _KERNEL && !_BOOT */
60 u_longlong_t
61 strtoull(const char *str, char **nptr, int base)
62 #endif /* _KERNEL && !_BOOT */
63 {
64 u_longlong_t val;
65 int c;
66 int xx;
67 int neg = 0;
68 u_longlong_t multmax;
69 const char **ptr = (const char **)nptr;
70 const unsigned char *ustr = (const unsigned char *)str;
71
72 if (ptr != NULL)
73 *ptr = (char *)ustr; /* in case no number is formed */
74 if (base < 0 || base > MBASE || base == 1) {
75 /* base is invalid -- should be a fatal error */
76 #if defined(_KERNEL) && !defined(_BOOT)
77 return (EINVAL);
78 #else /* _KERNEL && !_BOOT */
79 errno = EINVAL;
80 return (0);
81 #endif /* _KERNEL && !_BOOT */
82 }
83 if (!isalnum(c = *ustr)) {
84 while (isspace(c))
85 c = *++ustr;
86 switch (c) {
87 case '-':
88 neg++;
89 /* FALLTHROUGH */
90 case '+':
91 c = *++ustr;
92 }
93 }
94 if (base == 0) {
95 if (c != '0')
96 base = 10;
97 else if (ustr[1] == 'x' || ustr[1] == 'X')
98 base = 16;
99 else
100 base = 8;
101 }
102 /*
103 * for any base > 10, the digits incrementally following
104 * 9 are assumed to be "abc...z" or "ABC...Z"
105 */
106 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) {
107 /* no number formed */
108 #if defined(_KERNEL) && !defined(_BOOT)
109 return (EINVAL);
110 #else /* _KERNEL && !_BOOT */
111 return (0);
112 #endif /* _KERNEL && !_BOOT */
113 }
114 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
115 isxdigit(ustr[2]))
116 c = *(ustr += 2); /* skip over leading "0x" or "0X" */
117
118 multmax = ULLONG_MAX / (u_longlong_t)base;
119 val = DIGIT(c);
120 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
121 if (val > multmax)
122 goto overflow;
123 val *= base;
124 if (ULLONG_MAX - val < (unsigned long long)xx)
125 goto overflow;
126 val += xx;
127 c = *++ustr;
128 }
129 if (ptr != NULL)
130 *ptr = (char *)ustr;
131 #if defined(_KERNEL) && !defined(_BOOT)
132 *result = neg ? -val : val;
133 return (0);
134 #else /* _KERNEL && !_BOOT */
135 return (neg ? -val : val);
136 #endif /* _KERNEL && !_BOOT */
137
138 overflow:
139 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
140 ;
141 if (ptr != NULL)
142 *ptr = (char *)ustr;
143 #if defined(_KERNEL) && !defined(_BOOT)
144 return (ERANGE);
145 #else /* _KERNEL && !_BOOT */
146 errno = ERANGE;
147 return (ULLONG_MAX);
148 #endif /* _KERNEL && !_BOOT */
149 }
150