1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 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 __FBSDID("$FreeBSD: stable/12/lib/libc/locale/wcstol.c 326025 2017-11-20 19:49:47Z pfg $");
39
40 #include <ctype.h>
41 #include <errno.h>
42 #include <limits.h>
43 #include <wchar.h>
44 #include <wctype.h>
45 #include "xlocale_private.h"
46
47 /*
48 * Convert a string to a long integer.
49 */
50 long
wcstol_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)51 wcstol_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int
52 base, locale_t locale)
53 {
54 const wchar_t *s;
55 unsigned long acc;
56 wchar_t c;
57 unsigned long cutoff;
58 int neg, any, cutlim;
59 FIX_LOCALE(locale);
60
61 /*
62 * See strtol for comments as to the logic used.
63 */
64 s = nptr;
65 do {
66 c = *s++;
67 } while (iswspace_l(c, locale));
68 if (c == '-') {
69 neg = 1;
70 c = *s++;
71 } else {
72 neg = 0;
73 if (c == L'+')
74 c = *s++;
75 }
76 if ((base == 0 || base == 16) &&
77 c == L'0' && (*s == L'x' || *s == L'X')) {
78 c = s[1];
79 s += 2;
80 base = 16;
81 }
82 if (base == 0)
83 base = c == L'0' ? 8 : 10;
84 acc = any = 0;
85 if (base < 2 || base > 36)
86 goto noconv;
87
88 cutoff = neg ? (unsigned long)-(LONG_MIN + LONG_MAX) + LONG_MAX
89 : LONG_MAX;
90 cutlim = cutoff % base;
91 cutoff /= base;
92 for ( ; ; c = *s++) {
93 #ifdef notyet
94 if (iswdigit_l(c, locale))
95 c = digittoint_l(c, locale);
96 else
97 #endif
98 if (c >= L'0' && c <= L'9')
99 c -= L'0';
100 else if (c >= L'A' && c <= L'Z')
101 c -= L'A' - 10;
102 else if (c >= L'a' && c <= L'z')
103 c -= L'a' - 10;
104 else
105 break;
106 if (c >= base)
107 break;
108 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
109 any = -1;
110 else {
111 any = 1;
112 acc *= base;
113 acc += c;
114 }
115 }
116 if (any < 0) {
117 acc = neg ? LONG_MIN : LONG_MAX;
118 errno = ERANGE;
119 } else if (!any) {
120 noconv:
121 errno = EINVAL;
122 } else if (neg)
123 acc = -acc;
124 if (endptr != NULL)
125 *endptr = (wchar_t *)(any ? s - 1 : nptr);
126 return (acc);
127 }
128 long
wcstol(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)129 wcstol(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
130 {
131 return wcstol_l(nptr, endptr, base, __get_locale());
132 }
133