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
35 #define _DEFAULT_SOURCE
36 #include <sys/cdefs.h>
37 #if 0
38 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid[] = "from @(#)strtol.c 8.1 (Berkeley) 6/4/93";
40 #endif /* LIBC_SCCS and not lint */
41 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoimax.c,v 1.8 2002/09/06 11:23:59 tjr Exp ");
42 #endif
43 __FBSDID("$FreeBSD: head/lib/libc/locale/wcstoimax.c 314436 2017-02-28 23:42:47Z imp $");
44
45 #include <errno.h>
46 #include <inttypes.h>
47 #include <stdlib.h>
48 #include <wchar.h>
49 #include <wctype.h>
50 #include <stdint.h>
51 #include "../locale/setlocale.h"
52
53 /*
54 * Convert a wide character string to an intmax_t integer.
55 */
56
57 #ifndef _REENT_ONLY
58
59 intmax_t
wcstoimax_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t loc)60 wcstoimax_l(const wchar_t * __restrict nptr,
61 wchar_t ** __restrict endptr, int base, locale_t loc)
62 {
63 const wchar_t *s = nptr;
64 uintmax_t acc;
65 wchar_t c;
66 uintmax_t cutoff;
67 int neg = 0, any, cutlim;
68
69 /*
70 * See strtoimax for comments as to the logic used.
71 */
72 do {
73 c = *s++;
74 } while (iswspace_l(c, loc));
75 if (c == L'-') {
76 neg = 1;
77 c = *s++;
78 } else {
79 neg = 0;
80 if (c == L'+')
81 c = *s++;
82 }
83 if ((base == 0 || base == 16) &&
84 c == L'0' && (*s == L'x' || *s == L'X')) {
85 c = s[1];
86 s += 2;
87 base = 16;
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;
96 cutlim = cutoff % base;
97 cutoff /= base;
98 for ( ; ; c = *s++) {
99 #ifdef notyet
100 if (iswdigit_l(c, loc))
101 c = digittoint_l(c, loc);
102 else
103 #endif
104 if (c >= L'0' && c <= L'9')
105 c -= L'0';
106 else if (c >= L'A' && c <= L'Z')
107 c -= L'A' - 10;
108 else if (c >= 'a' && c <= 'z')
109 c -= L'a' - 10;
110 else
111 break;
112 if ((int) c >= base)
113 break;
114 if (any < 0 || acc > cutoff || (acc == cutoff && (int) c > cutlim))
115 any = -1;
116 else {
117 any = 1;
118 acc *= base;
119 acc += c;
120 }
121 }
122 if (any < 0) {
123 acc = neg ? INTMAX_MIN : INTMAX_MAX;
124 _REENT_ERRNO(rptr) = ERANGE;
125 } else if (!any) {
126 noconv:
127 _REENT_ERRNO(rptr) = EINVAL;
128 } else if (neg)
129 acc = -acc;
130 if (endptr != NULL)
131 *endptr = (wchar_t *)(any ? s - 1 : nptr);
132 return (acc);
133 }
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, int base)
137 {
138 return wcstoimax_l(nptr, endptr, base, __get_current_locale());
139 }
140
141 #endif
142
