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 long long 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_strtoll(const char * str,char ** nptr,int base,longlong_t * result)58 ddi_strtoll(const char *str, char **nptr, int base, longlong_t *result)
59 #else /* _KERNEL && !_BOOT */
60 longlong_t
61 strtoll(const char *str, char **nptr, int base)
62 #endif /* _KERNEL && !_BOOT */
63 {
64 longlong_t val;
65 int c;
66 int xx;
67 int neg = 0;
68 longlong_t multmin;
69 longlong_t limit;
70 const char **ptr = (const char **)nptr;
71 const unsigned char *ustr = (const unsigned char *)str;
72
73 if (ptr != NULL)
74 *ptr = (char *)ustr; /* in case no number is formed */
75 if (base < 0 || base > MBASE || base == 1) {
76 /* base is invalid -- should be a fatal error */
77 #if defined(_KERNEL) && !defined(_BOOT)
78 return (EINVAL);
79 #else /* _KERNEL && !_BOOT */
80 errno = EINVAL;
81 return (0);
82 #endif /* _KERNEL && !_BOOT */
83 }
84 if (!isalnum(c = *ustr)) {
85 while (isspace(c))
86 c = *++ustr;
87 switch (c) {
88 case '-':
89 neg++;
90 /* FALLTHROUGH */
91 case '+':
92 c = *++ustr;
93 }
94 }
95 if (base == 0) {
96 if (c != '0')
97 base = 10;
98 else if (ustr[1] == 'x' || ustr[1] == 'X')
99 base = 16;
100 else
101 base = 8;
102 }
103 /*
104 * for any base > 10, the digits incrementally following
105 * 9 are assumed to be "abc...z" or "ABC...Z"
106 */
107 if (!lisalnum(c) || (xx = DIGIT(c)) >= base) {
108 /* no number formed */
109 #if defined(_KERNEL) && !defined(_BOOT)
110 return (EINVAL);
111 #else /* _KERNEL && !_BOOT */
112 return (0);
113 #endif /* _KERNEL && !_BOOT */
114 }
115 if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
116 isxdigit(ustr[2]))
117 c = *(ustr += 2); /* skip over leading "0x" or "0X" */
118
119 /* this code assumes that abs(LLONG_MIN) >= abs(LLONG_MAX) */
120 if (neg)
121 limit = LLONG_MIN;
122 else
123 limit = -LLONG_MAX;
124 multmin = limit / (longlong_t)base;
125 val = -DIGIT(c);
126 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
127 /* accumulate neg avoids surprises near LLONG_MAX */
128 if (val < multmin)
129 goto overflow;
130 val *= base;
131 if (val < limit + xx)
132 goto overflow;
133 val -= xx;
134 c = *++ustr;
135 }
136 if (ptr != NULL)
137 *ptr = (char *)ustr;
138 #if defined(_KERNEL) && !defined(_BOOT)
139 *result = neg ? val : -val;
140 return (0);
141 #else /* _KERNEL && !_BOOT */
142 return (neg ? val : -val);
143 #endif /* _KERNEL && !_BOOT */
144
145 overflow:
146 for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
147 ;
148 if (ptr != NULL)
149 *ptr = (char *)ustr;
150 #if defined(_KERNEL) && !defined(_BOOT)
151 return (ERANGE);
152 #else /* _KERNEL && !_BOOT */
153 errno = ERANGE;
154 return (neg ? LLONG_MIN : LLONG_MAX);
155 #endif /* _KERNEL && !_BOOT */
156 }
157