1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 #if 0
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
42 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoull.c,v 1.18 2002/09/06 11:23:59 tjr Exp ");
43 #endif
44 __FBSDID("$FreeBSD: stable/12/lib/libc/locale/wcstoull.c 326025 2017-11-20 19:49:47Z pfg $");
45
46 #include <errno.h>
47 #include <limits.h>
48 #include <stdlib.h>
49 #include <wchar.h>
50 #include <wctype.h>
51 #include "xlocale_private.h"
52
53 /*
54 * Convert a wide character string to an unsigned long long integer.
55 */
56 unsigned long long
wcstoull_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)57 wcstoull_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
58 int base, locale_t locale)
59 {
60 const wchar_t *s;
61 unsigned long long acc;
62 wchar_t c;
63 unsigned long long cutoff;
64 int neg, any, cutlim;
65 FIX_LOCALE(locale);
66
67 /*
68 * See strtoull for comments as to the logic used.
69 */
70 s = nptr;
71 do {
72 c = *s++;
73 } while (iswspace_l(c, locale));
74 if (c == L'-') {
75 neg = 1;
76 c = *s++;
77 } else {
78 neg = 0;
79 if (c == L'+')
80 c = *s++;
81 }
82 if ((base == 0 || base == 16) &&
83 c == L'0' && (*s == L'x' || *s == L'X')) {
84 c = s[1];
85 s += 2;
86 base = 16;
87 }
88 if (base == 0)
89 base = c == L'0' ? 8 : 10;
90 acc = any = 0;
91 if (base < 2 || base > 36)
92 goto noconv;
93
94 cutoff = ULLONG_MAX / base;
95 cutlim = ULLONG_MAX % base;
96 for ( ; ; c = *s++) {
97 #ifdef notyet
98 if (iswdigit_l(c, locale))
99 c = digittoint_l(c, locale);
100 else
101 #endif
102 if (c >= L'0' && c <= L'9')
103 c -= L'0';
104 else if (c >= L'A' && c <= L'Z')
105 c -= L'A' - 10;
106 else if (c >= L'a' && c <= L'z')
107 c -= L'a' - 10;
108 else
109 break;
110 if (c >= base)
111 break;
112 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
113 any = -1;
114 else {
115 any = 1;
116 acc *= base;
117 acc += c;
118 }
119 }
120 if (any < 0) {
121 acc = ULLONG_MAX;
122 errno = ERANGE;
123 } else if (!any) {
124 noconv:
125 errno = EINVAL;
126 } else if (neg)
127 acc = -acc;
128 if (endptr != NULL)
129 *endptr = (wchar_t *)(any ? s - 1 : nptr);
130 return (acc);
131 }
132 unsigned long long
wcstoull(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)133 wcstoull(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
134 int base)
135 {
136 return wcstoull_l(nptr, endptr, base, __get_locale());
137 }
138