1 /* $NetBSD: _strtoul.h,v 1.7 2013/05/17 12:55:56 joerg Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * Original version ID:
32 * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp
33 */
34
35 /*
36 * function template for strtoul, strtoull and strtoumax.
37 *
38 * parameters:
39 * _FUNCNAME : function name
40 * __UINT : return type
41 * __UINT_MAX : upper limit of the return type
42 */
43 #if defined(_KERNEL) || defined(_STANDALONE) || \
44 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY)
45 __UINT
_FUNCNAME(const char * nptr,char ** endptr,int base)46 _FUNCNAME(const char *nptr, char **endptr, int base)
47 #else
48 #include <locale.h>
49 #include "setlocale_local.h"
50 #define INT_FUNCNAME_(pre, name, post) pre ## name ## post
51 #define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post)
52
53 static __UINT
54 INT_FUNCNAME(_int_, _FUNCNAME, _l)(const char *nptr, char **endptr,
55 int base, locale_t loc)
56 #endif
57 {
58 const char *s;
59 __UINT acc, cutoff;
60 unsigned char c;
61 int i, neg, any, cutlim;
62
63 _DIAGASSERT(nptr != NULL);
64 /* endptr may be NULL */
65
66 /* check base value */
67 if (base && (base < 2 || base > 36)) {
68 #if !defined(_KERNEL) && !defined(_STANDALONE)
69 errno = EINVAL;
70 return(0);
71 #else
72 panic("%s: invalid base %d", __func__, base);
73 #endif
74 }
75
76 /*
77 * Skip white space and pick up leading +/- sign if any.
78 * If base is 0, allow 0x for hex and 0 for octal, else
79 * assume decimal; if base is already 16, allow 0x.
80 */
81 s = nptr;
82 #if defined(_KERNEL) || defined(_STANDALONE) || \
83 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY)
84 do {
85 c = *s++;
86 } while (isspace(c));
87 #else
88 do {
89 c = *s++;
90 } while (isspace_l(c, loc));
91 #endif
92 if (c == '-') {
93 neg = 1;
94 c = *s++;
95 } else {
96 neg = 0;
97 if (c == '+')
98 c = *s++;
99 }
100 if ((base == 0 || base == 16) &&
101 c == '0' && (*s == 'x' || *s == 'X')) {
102 c = s[1];
103 s += 2;
104 base = 16;
105 }
106 if (base == 0)
107 base = (c == '0' ? 8 : 10);
108
109 /*
110 * See strtol for comments as to the logic used.
111 */
112 cutoff = ((__UINT)__UINT_MAX / (__UINT)base);
113 cutlim = (int)((__UINT)__UINT_MAX % (__UINT)base);
114 for (acc = 0, any = 0;; c = *s++) {
115 if (c >= '0' && c <= '9')
116 i = c - '0';
117 else if (c >= 'a' && c <= 'z')
118 i = (c - 'a') + 10;
119 else if (c >= 'A' && c <= 'Z')
120 i = (c - 'A') + 10;
121 else
122 break;
123 if (i >= base)
124 break;
125 if (any < 0)
126 continue;
127 if (acc > cutoff || (acc == cutoff && i > cutlim)) {
128 acc = __UINT_MAX;
129 #if !defined(_KERNEL) && !defined(_STANDALONE)
130 any = -1;
131 errno = ERANGE;
132 #else
133 any = 0;
134 break;
135 #endif
136 } else {
137 any = 1;
138 acc *= (__UINT)base;
139 acc += i;
140 }
141 }
142 if (neg && any > 0)
143 acc = -acc;
144 if (endptr != NULL)
145 /* LINTED interface specification */
146 *endptr = __UNCONST(any ? s - 1 : nptr);
147 return(acc);
148 }
149
150 #if !defined(_KERNEL) && !defined(_STANDALONE) && \
151 !defined(HAVE_NBTOOL_CONFIG_H) && !defined(BCS_ONLY)
152 __UINT
_FUNCNAME(const char * nptr,char ** endptr,int base)153 _FUNCNAME(const char *nptr, char **endptr, int base)
154 {
155 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, _current_locale());
156 }
157
158 __UINT
159 INT_FUNCNAME(, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc)
160 {
161 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc);
162 }
163 #endif
164