]> git.saurik.com Git - apple/libc.git/blob - locale/FreeBSD/wcstoimax.c
Libc-1439.100.3.tar.gz
[apple/libc.git] / locale / FreeBSD / wcstoimax.c
1 /*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #if 0
32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "from @(#)strtol.c 8.1 (Berkeley) 6/4/93";
34 #endif /* LIBC_SCCS and not lint */
35 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoimax.c,v 1.8 2002/09/06 11:23:59 tjr Exp ");
36 #endif
37 __FBSDID("$FreeBSD: src/lib/libc/locale/wcstoimax.c,v 1.3 2007/01/09 00:28:01 imp Exp $");
38
39 #include "xlocale_private.h"
40
41 #include <errno.h>
42 #include <inttypes.h>
43 #include <stdlib.h>
44 #include <wchar.h>
45 #include <wctype.h>
46
47 /*
48 * Convert a wide character string to an intmax_t integer.
49 */
50 intmax_t
51 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
52 int base, locale_t loc)
53 {
54 const wchar_t *s;
55 uintmax_t acc;
56 wchar_t c;
57 uintmax_t cutoff;
58 int neg, any, cutlim;
59
60 NORMALIZE_LOCALE(loc);
61 /*
62 * See strtoimax for comments as to the logic used.
63 */
64 s = nptr;
65 do {
66 c = *s++;
67 } while (iswspace_l(c, loc));
68 if (c == L'-') {
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 ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX
89 : INTMAX_MAX;
90 cutlim = cutoff % base;
91 cutoff /= base;
92 for ( ; ; c = *s++) {
93 #ifdef notyet
94 if (iswdigit_l(c, loc))
95 c = digittoint_l(c, loc);
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 >= 'a' && c <= '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 ? INTMAX_MIN : INTMAX_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
129 intmax_t
130 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
131 int base)
132 {
133 return wcstoimax_l(nptr, endptr, base, __current_locale());
134 }