1/*-
2 * Copyright (c) 1990, 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__FBSDID("$FreeBSD$");
37
38#include <ctype.h>
39#include <errno.h>
40#include <limits.h>
41#include <wchar.h>
42#include <wctype.h>
43#include "xlocale_private.h"
44
45/*
46 * Convert a string to a long integer.
47 */
48long
49wcstol_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int
50		base, locale_t locale)
51{
52	const wchar_t *s;
53	unsigned long acc;
54	wchar_t c;
55	unsigned long cutoff;
56	int neg, any, cutlim;
57	FIX_LOCALE(locale);
58
59	/*
60	 * See strtol for comments as to the logic used.
61	 */
62	s = nptr;
63	do {
64		c = *s++;
65	} while (iswspace_l(c, locale));
66	if (c == '-') {
67		neg = 1;
68		c = *s++;
69	} else {
70		neg = 0;
71		if (c == L'+')
72			c = *s++;
73	}
74	if ((base == 0 || base == 16) &&
75	    c == L'0' && (*s == L'x' || *s == L'X')) {
76		c = s[1];
77		s += 2;
78		base = 16;
79	}
80	if (base == 0)
81		base = c == L'0' ? 8 : 10;
82	acc = any = 0;
83	if (base < 2 || base > 36)
84		goto noconv;
85
86	cutoff = neg ? (unsigned long)-(LONG_MIN + LONG_MAX) + LONG_MAX
87	    : LONG_MAX;
88	cutlim = cutoff % base;
89	cutoff /= base;
90	for ( ; ; c = *s++) {
91#ifdef notyet
92		if (iswdigit_l(c, locale))
93			c = digittoint_l(c, locale);
94		else
95#endif
96		if (c >= L'0' && c <= L'9')
97			c -= L'0';
98		else if (c >= L'A' && c <= L'Z')
99			c -= L'A' - 10;
100		else if (c >= L'a' && c <= L'z')
101			c -= L'a' - 10;
102		else
103			break;
104		if (c >= base)
105			break;
106		if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
107			any = -1;
108		else {
109			any = 1;
110			acc *= base;
111			acc += c;
112		}
113	}
114	if (any < 0) {
115		acc = neg ? LONG_MIN : LONG_MAX;
116		errno = ERANGE;
117	} else if (!any) {
118noconv:
119		errno = EINVAL;
120	} else if (neg)
121		acc = -acc;
122	if (endptr != NULL)
123		*endptr = (wchar_t *)(any ? s - 1 : nptr);
124	return (acc);
125}
126long
127wcstol(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
128{
129	return wcstol_l(nptr, endptr, base, __get_locale());
130}
131