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 *
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 <errno.h>
38 #include <inttypes.h>
39 #include <stdlib.h>
40 #include <wchar.h>
41 #include <wctype.h>
42 #include "xlocale_private.h"
43
44 /*
45 * Convert a wide character string to an intmax_t integer.
46 */
47 intmax_t
wcstoimax_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)48 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
49 int base, locale_t locale)
50 {
51 const wchar_t *s;
52 uintmax_t acc;
53 wchar_t c;
54 uintmax_t cutoff;
55 int neg, any, cutlim;
56 FIX_LOCALE(locale);
57
58 /*
59 * See strtoimax for comments as to the logic used.
60 */
61 s = nptr;
62 do {
63 c = *s++;
64 } while (iswspace_l(c, locale));
65 if (c == L'-') {
66 neg = 1;
67 c = *s++;
68 } else {
69 neg = 0;
70 if (c == L'+')
71 c = *s++;
72 }
73 if ((base == 0 || base == 16) &&
74 c == L'0' && (*s == L'x' || *s == L'X') &&
75 ((s[1] >= L'0' && s[1] <= L'9') ||
76 (s[1] >= L'A' && s[1] <= L'F') ||
77 (s[1] >= L'a' && s[1] <= L'f'))) {
78 c = s[1];
79 s += 2;
80 base = 16;
81 }
82 if ((base == 0 || base == 2) &&
83 c == L'0' && (*s == L'b' || *s == L'B') &&
84 (s[1] >= L'0' && s[1] <= L'1')) {
85 c = s[1];
86 s += 2;
87 base = 2;
88 }
89 if (base == 0)
90 base = c == L'0' ? 8 : 10;
91 acc = any = 0;
92 if (base < 2 || base > 36)
93 goto noconv;
94
95 cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX
96 : INTMAX_MAX;
97 cutlim = cutoff % base;
98 cutoff /= base;
99 for ( ; ; c = *s++) {
100 #ifdef notyet
101 if (iswdigit_l(c, locale))
102 c = digittoint_l(c, locale);
103 else
104 #endif
105 if (c >= L'0' && c <= L'9')
106 c -= L'0';
107 else if (c >= L'A' && c <= L'Z')
108 c -= L'A' - 10;
109 else if (c >= 'a' && c <= 'z')
110 c -= L'a' - 10;
111 else
112 break;
113 if (c >= base)
114 break;
115 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
116 any = -1;
117 else {
118 any = 1;
119 acc *= base;
120 acc += c;
121 }
122 }
123 if (any < 0) {
124 acc = neg ? INTMAX_MIN : INTMAX_MAX;
125 errno = ERANGE;
126 } else if (!any) {
127 noconv:
128 errno = EINVAL;
129 } else if (neg)
130 acc = -acc;
131 if (endptr != NULL)
132 *endptr = (wchar_t *)(any ? s - 1 : nptr);
133 return (acc);
134 }
135 intmax_t
wcstoimax(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)136 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
137 int base)
138 {
139 return wcstoimax_l(nptr, endptr, base, __get_locale());
140 }
141