1/*
2 * Copyright (c) 1990, 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__FBSDID("$FreeBSD: src/lib/libc/locale/wcstoul.c,v 1.2 2007/01/09 00:28:01 imp Exp $");
32
33#include "xlocale_private.h"
34
35#include <ctype.h>
36#include <errno.h>
37#include <limits.h>
38#include <wchar.h>
39#include <wctype.h>
40
41/*
42 * Convert a wide character string to an unsigned long integer.
43 */
44unsigned long
45wcstoul_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
46    int base, locale_t loc)
47{
48	const wchar_t *s;
49	unsigned long acc;
50	wchar_t c;
51	unsigned long cutoff;
52	int neg, any, cutlim;
53
54	NORMALIZE_LOCALE(loc);
55	/*
56	 * See strtol for comments as to the logic used.
57	 */
58	s = nptr;
59	do {
60		c = *s++;
61	} while (iswspace_l(c, loc));
62	if (c == L'-') {
63		neg = 1;
64		c = *s++;
65	} else {
66		neg = 0;
67		if (c == L'+')
68			c = *s++;
69	}
70	if ((base == 0 || base == 16) &&
71	    c == L'0' && (*s == L'x' || *s == L'X')) {
72		c = s[1];
73		s += 2;
74		base = 16;
75	}
76	if (base == 0)
77		base = c == L'0' ? 8 : 10;
78	acc = any = 0;
79	if (base < 2 || base > 36)
80		goto noconv;
81
82	cutoff = ULONG_MAX / base;
83	cutlim = ULONG_MAX % base;
84	for ( ; ; c = *s++) {
85#ifdef notyet
86		if (iswdigit_l(c, loc))
87			c = digittoint_l(c, loc);
88		else
89#endif
90		if (c >= L'0' && c <= L'9')
91			c -= L'0';
92		else if (c >= L'A' && c <= L'Z')
93			c -= L'A' - 10;
94		else if (c >= L'a' && c <= L'z')
95			c -= L'a' - 10;
96		else
97			break;
98		if (c >= base)
99			break;
100		if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
101			any = -1;
102		else {
103			any = 1;
104			acc *= base;
105			acc += c;
106		}
107	}
108	if (any < 0) {
109		acc = ULONG_MAX;
110		errno = ERANGE;
111	} else if (!any) {
112noconv:
113		errno = EINVAL;
114	} else if (neg)
115		acc = -acc;
116	if (endptr != NULL)
117		*endptr = (wchar_t *)(any ? s - 1 : nptr);
118	return (acc);
119}
120
121unsigned long
122wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
123{
124	return wcstoul_l(nptr, endptr, base, __current_locale());
125}
126