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 * 4. 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
35 #include <sys/cdefs.h>
36 #if 0
37 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "from @(#)strtol.c 8.1 (Berkeley) 6/4/93";
39 #endif /* LIBC_SCCS and not lint */
40 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoimax.c,v 1.8 2002/09/06 11:23:59 tjr Exp ");
41 #endif
42 __FBSDID("$FreeBSD$");
43
44 #include <errno.h>
45 #include <inttypes.h>
46 #include <stdlib.h>
47 #include <wchar.h>
48 #include <wctype.h>
49 #include "xlocale_private.h"
50
51 /*
52 * Convert a wide character string to an intmax_t integer.
53 */
54 intmax_t
wcstoimax_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t locale)55 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
56 int base, locale_t locale)
57 {
58 const wchar_t *s;
59 uintmax_t acc;
60 wchar_t c;
61 uintmax_t cutoff;
62 int neg, any, cutlim;
63 FIX_LOCALE(locale);
64
65 /*
66 * See strtoimax for comments as to the logic used.
67 */
68 s = nptr;
69 do {
70 c = *s++;
71 } while (iswspace_l(c, locale));
72 if (c == L'-') {
73 neg = 1;
74 c = *s++;
75 } else {
76 neg = 0;
77 if (c == L'+')
78 c = *s++;
79 }
80 if ((base == 0 || base == 16) &&
81 c == L'0' && (*s == L'x' || *s == L'X')) {
82 c = s[1];
83 s += 2;
84 base = 16;
85 }
86 if (base == 0)
87 base = c == L'0' ? 8 : 10;
88 acc = any = 0;
89 if (base < 2 || base > 36)
90 goto noconv;
91
92 cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX
93 : INTMAX_MAX;
94 cutlim = cutoff % base;
95 cutoff /= 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 >= 'a' && c <= '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 = neg ? INTMAX_MIN : INTMAX_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 intmax_t
wcstoimax(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base)133 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
134 int base)
135 {
136 return wcstoimax_l(nptr, endptr, base, __get_locale());
137 }
138