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Commit	Line	Data
	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	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#include <sys/cdefs.h>
	35	#if 0
	36	#if defined(LIBC_SCCS) && !defined(lint)
	37	static char sccsid[] = "@(#)strtouq.c 8.1 (Berkeley) 6/4/93";
	38	#endif /* LIBC_SCCS and not lint */
	39	__FBSDID("FreeBSD: src/lib/libc/stdlib/strtoull.c,v 1.18 2002/09/06 11:23:59 tjr Exp ");
	40	#endif
	41	__FBSDID("$FreeBSD: src/lib/libc/locale/wcstoull.c,v 1.1 2002/09/22 08:06:45 tjr Exp $");
	42
	43	#include <errno.h>
	44	#include <limits.h>
	45	#include <stdlib.h>
	46	#include <wchar.h>
	47	#include <wctype.h>
	48
	49	/*
	50	* Convert a wide character string to an unsigned long long integer.
	51	*/
	52	unsigned long long
	53	wcstoull(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
	54	int base)
	55	{
	56	const wchar_t *s;
	57	unsigned long long acc;
	58	wchar_t c;
	59	unsigned long long cutoff;
	60	int neg, any, cutlim;
	61
	62	/*
	63	* See strtoull for comments as to the logic used.
	64	*/
	65	s = nptr;
	66	do {
	67	c = *s++;
	68	} while (iswspace(c));
	69	if (c == L'-') {
	70	neg = 1;
	71	c = *s++;
	72	} else {
	73	neg = 0;
	74	if (c == L'+')
	75	c = *s++;
	76	}
	77	if ((base == 0 \|\| base == 16) &&
	78	c == L'0' && (s == L'x' \|\| s == L'X')) {
	79	c = s[1];
	80	s += 2;
	81	base = 16;
	82	}
	83	if (base == 0)
	84	base = c == L'0' ? 8 : 10;
	85	acc = any = 0;
	86	if (base < 2 \|\| base > 36)
	87	goto noconv;
	88
	89	cutoff = ULLONG_MAX / base;
	90	cutlim = ULLONG_MAX % base;
	91	for ( ; ; c = *s++) {
	92	#ifdef notyet
	93	if (iswdigit(c))
	94	c = digittoint(c);
	95	else
	96	#endif
	97	if (c >= L'0' && c <= L'9')
	98	c -= L'0';
	99	else if (c >= L'A' && c <= L'Z')
	100	c -= L'A' - 10;
	101	else if (c >= L'a' && c <= L'z')
	102	c -= L'a' - 10;
	103	else
	104	break;
	105	if (c >= base)
	106	break;
	107	if (any < 0 \|\| acc > cutoff \|\| (acc == cutoff && c > cutlim))
	108	any = -1;
	109	else {
	110	any = 1;
	111	acc *= base;
	112	acc += c;
	113	}
	114	}
	115	if (any < 0) {
	116	acc = ULLONG_MAX;
	117	errno = ERANGE;
	118	} else if (!any) {
	119	noconv:
	120	errno = EINVAL;
	121	} else if (neg)
	122	acc = -acc;
	123	if (endptr != NULL)
	124	endptr = (wchar_t )(any ? s - 1 : nptr);
	125	return (acc);
	126	}