1 /*-
2 * Copyright (c) 1992, 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 * from @(#)strtol.c 8.1 (Berkeley) 6/4/93
35 * $FreeBSD: head/lib/libc/locale/wcstoimax.c 227753 2011-11-20 14:45:42Z theraven $
36 */
37
38
39 #include <errno.h>
40 #include <inttypes.h>
41 #include <stdlib.h>
42 #include <wchar.h>
43 #include <wctype.h>
44 #include "xlocale_private.h"
45
46 /*
47 * Convert a wide character string to an intmax_t integer.
48 */
49 intmax_t
wcstoimax_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)50 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
51 int base, locale_t locale)
52 {
53 const wchar_t *s;
54 uintmax_t acc;
55 wchar_t c;
56 uintmax_t cutoff;
57 int neg, any, cutlim;
58 FIX_LOCALE(locale);
59
60 /*
61 * See strtoimax for comments as to the logic used.
62 */
63 s = nptr;
64 do {
65 c = *s++;
66 } while (iswspace_l(c, locale));
67 if (c == L'-') {
68 neg = 1;
69 c = *s++;
70 } else {
71 neg = 0;
72 if (c == L'+')
73 c = *s++;
74 }
75 if ((base == 0 || base == 16) &&
76 c == L'0' &&
77 (*s == L'x' || *s == L'X') &&
78 iswxdigit_l(s[1], locale))
79 {
80 c = s[1];
81 s += 2;
82 base = 16;
83 }
84 if (base == 0)
85 base = c == L'0' ? 8 : 10;
86 acc = any = 0;
87 if (base < 2 || base > 36)
88 goto noconv;
89
90 cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX
91 : INTMAX_MAX;
92 cutlim = cutoff % base;
93 cutoff /= base;
94 for ( ; ; c = *s++) {
95 #ifdef notyet
96 if (iswdigit_l(c, locale))
97 c = digittoint_l(c, locale);
98 else
99 #endif
100 if (c >= L'0' && c <= L'9')
101 c -= L'0';
102 else if (c >= L'A' && c <= L'Z')
103 c -= L'A' - 10;
104 else if (c >= 'a' && c <= 'z')
105 c -= L'a' - 10;
106 else
107 break;
108 if (c >= base)
109 break;
110 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
111 any = -1;
112 else {
113 any = 1;
114 acc *= base;
115 acc += c;
116 }
117 }
118 if (any < 0) {
119 acc = neg ? INTMAX_MIN : INTMAX_MAX;
120 errno = ERANGE;
121 } else if (!any) {
122 noconv:
123 errno = EINVAL;
124 } else if (neg)
125 acc = -acc;
126 if (endptr != NULL)
127 *endptr = (wchar_t *)(any ? s - 1 : nptr);
128 return (acc);
129 }
130 intmax_t
wcstoimax(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)131 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
132 int base)
133 {
134 return wcstoimax_l(nptr, endptr, base, __get_locale());
135 }
136