1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Copyright (c) 2011 The FreeBSD Foundation
8 * All rights reserved.
9 * Portions of this software were developed by David Chisnall
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38#if 0
39#if defined(LIBC_SCCS) && !defined(lint)
40static char sccsid[] = "@(#)strtoq.c	8.1 (Berkeley) 6/4/93";
41#endif /* LIBC_SCCS and not lint */
42__FBSDID("FreeBSD: src/lib/libc/stdlib/strtoll.c,v 1.19 2002/09/06 11:23:59 tjr Exp ");
43#endif
44__FBSDID("$FreeBSD$");
45
46#include <errno.h>
47#include <limits.h>
48#include <stdlib.h>
49#include <wchar.h>
50#include <wctype.h>
51#include "xlocale_private.h"
52
53/*
54 * Convert a wide character string to a long long integer.
55 */
56long long
57wcstoll_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
58		int base, locale_t locale)
59{
60	const wchar_t *s;
61	unsigned long long acc;
62	wchar_t c;
63	unsigned long long cutoff;
64	int neg, any, cutlim;
65	FIX_LOCALE(locale);
66
67	/*
68	 * See strtoll for comments as to the logic used.
69	 */
70	s = nptr;
71	do {
72		c = *s++;
73	} while (iswspace_l(c, locale));
74	if (c == L'-') {
75		neg = 1;
76		c = *s++;
77	} else {
78		neg = 0;
79		if (c == L'+')
80			c = *s++;
81	}
82	if ((base == 0 || base == 16) &&
83	    c == L'0' && (*s == L'x' || *s == L'X')) {
84		c = s[1];
85		s += 2;
86		base = 16;
87	}
88	if (base == 0)
89		base = c == L'0' ? 8 : 10;
90	acc = any = 0;
91	if (base < 2 || base > 36)
92		goto noconv;
93
94	cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX
95	    : LLONG_MAX;
96	cutlim = cutoff % base;
97	cutoff /= base;
98	for ( ; ; c = *s++) {
99#ifdef notyet
100		if (iswdigit_l(c, locale))
101			c = digittoint_l(c, locale);
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 >= L'a' && c <= L'z')
109			c -= L'a' - 10;
110		else
111			break;
112		if (c >= base)
113			break;
114		if (any < 0 || acc > cutoff || (acc == cutoff && 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 ? LLONG_MIN : LLONG_MAX;
124		errno = ERANGE;
125	} else if (!any) {
126noconv:
127		errno = EINVAL;
128	} else if (neg)
129		acc = -acc;
130	if (endptr != NULL)
131		*endptr = (wchar_t *)(any ? s - 1 : nptr);
132	return (acc);
133}
134long long
135wcstoll(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
136{
137	return wcstoll_l(nptr, endptr, base, __get_locale());
138}
139