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Commit	Line	Data
	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 <ctype.h>
	34	#include <errno.h>
	35	#include <limits.h>
	36	#include <wchar.h>
	37	#include <wctype.h>
	38
	39	/*
	40	* Convert a wide character string to an unsigned long integer.
	41	*/
	42	unsigned long
	43	wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
	44	{
	45	const wchar_t *s;
	46	unsigned long acc;
	47	wchar_t c;
	48	unsigned long cutoff;
	49	int neg, any, cutlim;
	50
	51	/*
	52	* See strtol for comments as to the logic used.
	53	*/
	54	s = nptr;
	55	do {
	56	c = *s++;
	57	} while (iswspace(c));
	58	if (c == L'-') {
	59	neg = 1;
	60	c = *s++;
	61	} else {
	62	neg = 0;
	63	if (c == L'+')
	64	c = *s++;
	65	}
	66	if ((base == 0 \|\| base == 16) &&
	67	c == L'0' && (s == L'x' \|\| s == L'X')) {
	68	c = s[1];
	69	s += 2;
	70	base = 16;
	71	}
	72	if (base == 0)
	73	base = c == L'0' ? 8 : 10;
	74	acc = any = 0;
	75	if (base < 2 \|\| base > 36)
	76	goto noconv;
	77
	78	cutoff = ULONG_MAX / base;
	79	cutlim = ULONG_MAX % base;
	80	for ( ; ; c = *s++) {
	81	#ifdef notyet
	82	if (iswdigit(c))
	83	c = digittoint(c);
	84	else
	85	#endif
	86	if (c >= L'0' && c <= L'9')
	87	c -= L'0';
	88	else if (c >= L'A' && c <= L'Z')
	89	c -= L'A' - 10;
	90	else if (c >= L'a' && c <= L'z')
	91	c -= L'a' - 10;
	92	else
	93	break;
	94	if (c >= base)
	95	break;
	96	if (any < 0 \|\| acc > cutoff \|\| (acc == cutoff && c > cutlim))
	97	any = -1;
	98	else {
	99	any = 1;
	100	acc *= base;
	101	acc += c;
	102	}
	103	}
	104	if (any < 0) {
	105	acc = ULONG_MAX;
	106	errno = ERANGE;
	107	} else if (!any) {
	108	noconv:
	109	errno = EINVAL;
	110	} else if (neg)
	111	acc = -acc;
	112	if (endptr != NULL)
	113	endptr = (wchar_t )(any ? s - 1 : nptr);
	114	return (acc);
	115	}