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)
33static 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 */
50intmax_t
51wcstoimax_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) {
120noconv:
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
129intmax_t
130wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
131    int base)
132{
133	return wcstoimax_l(nptr, endptr, base, __current_locale());
134}
135