1 /*
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Copyright (c) 2011 The FreeBSD Foundation
6 * All rights reserved.
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: head/lib/libc/locale/wcstoul.c 227753 2011-11-20 14:45:42Z theraven $
35 */
36
37
38 #include <ctype.h>
39 #include <errno.h>
40 #include <limits.h>
41 #include <wchar.h>
42 #include <wctype.h>
43 #include "xlocale_private.h"
44
45 /*
46 * Convert a wide character string to an unsigned long integer.
47 */
48 unsigned long
wcstoul_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)49 wcstoul_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
50 int base, locale_t locale)
51 {
52 const wchar_t *s;
53 unsigned long acc;
54 wchar_t c;
55 unsigned long cutoff;
56 int neg, any, cutlim;
57 FIX_LOCALE(locale);
58
59 /*
60 * See strtol for comments as to the logic used.
61 */
62 s = nptr;
63 do {
64 c = *s++;
65 } while (iswspace_l(c, locale));
66 if (c == L'-') {
67 neg = 1;
68 c = *s++;
69 } else {
70 neg = 0;
71 if (c == L'+')
72 c = *s++;
73 }
74 if ((base == 0 || base == 16) &&
75 c == L'0' &&
76 (*s == L'x' || *s == L'X') &&
77 iswxdigit_l(s[1], locale))
78 {
79 c = s[1];
80 s += 2;
81 base = 16;
82 }
83 if (base == 0)
84 base = c == L'0' ? 8 : 10;
85 acc = any = 0;
86 if (base < 2 || base > 36)
87 goto noconv;
88
89 cutoff = ULONG_MAX / base;
90 cutlim = ULONG_MAX % base;
91 for ( ; ; c = *s++) {
92 #ifdef notyet
93 if (iswdigit_l(c, locale))
94 c = digittoint_l(c, locale);
95 else
96 #endif
97 if (c >= L'0' && c <= L'9')
98 c -= L'0';
99 else if (c >= L'A' && c <= L'Z')
100 c -= L'A' - 10;
101 else if (c >= L'a' && c <= L'z')
102 c -= L'a' - 10;
103 else
104 break;
105 if (c >= base)
106 break;
107 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
108 any = -1;
109 else {
110 any = 1;
111 acc *= base;
112 acc += c;
113 }
114 }
115 if (any < 0) {
116 acc = ULONG_MAX;
117 errno = ERANGE;
118 } else if (!any) {
119 noconv:
120 errno = EINVAL;
121 } else if (neg)
122 acc = -acc;
123 if (endptr != NULL)
124 *endptr = (wchar_t *)(any ? s - 1 : nptr);
125 return (acc);
126 }
127 unsigned long
wcstoul(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)128 wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
129 {
130 return wcstoul_l(nptr, endptr, base, __get_locale());
131 }
132