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 #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 #endif
41
42 #include <errno.h>
43 #include <inttypes.h>
44 #include <stdlib.h>
45 #include <wchar.h>
46 #include <wctype.h>
47 #include <stdint.h>
48 #include "../locale/setlocale.h"
49
50 /*
51 * Convert a wide character string to an intmax_t integer.
52 */
53
54 #ifndef _REENT_ONLY
55
56 intmax_t
wcstoimax_l(const wchar_t * __restrict nptr,wchar_t ** __restrict endptr,int base,locale_t loc)57 wcstoimax_l(const wchar_t * __restrict nptr,
58 wchar_t ** __restrict endptr, int base, locale_t loc)
59 {
60 const wchar_t *s = nptr;
61 uintmax_t acc;
62 wchar_t c;
63 uintmax_t cutoff;
64 int neg = 0, any, cutlim;
65
66 /*
67 * See strtoimax for comments as to the logic used.
68 */
69 do {
70 c = *s++;
71 } while (iswspace_l(c, loc));
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;
93 cutlim = cutoff % base;
94 cutoff /= base;
95 for ( ; ; c = *s++) {
96 #ifdef notyet
97 if (iswdigit_l(c, loc))
98 c = digittoint_l(c, loc);
99 else
100 #endif
101 if (c >= L'0' && c <= L'9')
102 c -= L'0';
103 else if (c >= L'A' && c <= L'Z')
104 c -= L'A' - 10;
105 else if (c >= 'a' && c <= 'z')
106 c -= L'a' - 10;
107 else
108 break;
109 if ((int) c >= base)
110 break;
111 if (any < 0 || acc > cutoff || (acc == cutoff && (int) c > cutlim))
112 any = -1;
113 else {
114 any = 1;
115 acc *= base;
116 acc += c;
117 }
118 }
119 if (any < 0) {
120 acc = neg ? INTMAX_MIN : INTMAX_MAX;
121 _REENT_ERRNO(rptr) = ERANGE;
122 } else if (!any) {
123 noconv:
124 _REENT_ERRNO(rptr) = EINVAL;
125 } else if (neg)
126 acc = -acc;
127 if (endptr != NULL)
128 *endptr = (wchar_t *)(any ? s - 1 : nptr);
129 return (acc);
130 }
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, int base)
134 {
135 return wcstoimax_l(nptr, endptr, base, __get_current_locale());
136 }
137
138 #endif
139
