[apple/libc.git] / locale / FreeBSD / wcstoul.c

/*
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/locale/wcstoul.c,v 1.2 2007/01/09 00:28:01 imp Exp $");

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <wchar.h>
#include <wctype.h>

/*
 * Convert a wide character string to an unsigned long integer.
 */
unsigned long
wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
{
	const wchar_t *s;
	unsigned long acc;
	wchar_t c;
	unsigned long cutoff;
	int neg, any, cutlim;

	/*
	 * See strtol for comments as to the logic used.
	 */
	s = nptr;
	do {
		c = *s++;
	} while (iswspace(c));
	if (c == L'-') {
		neg = 1;
		c = *s++;
	} else {
		neg = 0;
		if (c == L'+')
			c = *s++;
	}
	if ((base == 0 || base == 16) &&
	    c == L'0' && (*s == L'x' || *s == L'X')) {
		c = s[1];
		s += 2;
		base = 16;
	}
	if (base == 0)
		base = c == L'0' ? 8 : 10;
	acc = any = 0;
	if (base < 2 || base > 36)
		goto noconv;

	cutoff = ULONG_MAX / base;
	cutlim = ULONG_MAX % base;
	for ( ; ; c = *s++) {
#ifdef notyet
		if (iswdigit(c))
			c = digittoint(c);
		else
#endif
		if (c >= L'0' && c <= L'9')
			c -= L'0';
		else if (c >= L'A' && c <= L'Z')
			c -= L'A' - 10;
		else if (c >= L'a' && c <= L'z')
			c -= L'a' - 10;
		else
			break;
		if (c >= base)
			break;
		if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
			any = -1;
		else {
			any = 1;
			acc *= base;
			acc += c;
		}
	}
	if (any < 0) {
		acc = ULONG_MAX;
		errno = ERANGE;
	} else if (!any) {
noconv:
		errno = EINVAL;
	} else if (neg)
		acc = -acc;
	if (endptr != NULL)
		*endptr = (wchar_t *)(any ? s - 1 : nptr);
	return (acc);
}
Commit	Line	Data
9385eb3d A	1	/*
9385eb3d A	2	* Copyright (c) 1990, 1993
e9ce8d39 A	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.
e9ce8d39 A	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
9385eb3d	30	#include <sys/cdefs.h>
1f2f436a	31	__FBSDID("$FreeBSD: src/lib/libc/locale/wcstoul.c,v 1.2 2007/01/09 00:28:01 imp Exp $");
e9ce8d39	32
e9ce8d39	33	#include <ctype.h>
9385eb3d A	34	#include <errno.h>
	35	#include <limits.h>
	36	#include <wchar.h>
	37	#include <wctype.h>
e9ce8d39 A	38
e9ce8d39 A	39	/*
9385eb3d	40	* Convert a wide character string to an unsigned long integer.
e9ce8d39	41	*/
9385eb3d A	42	unsigned long
9385eb3d A	43	wcstoul(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
e9ce8d39	44	{
9385eb3d A	45	const wchar_t *s;
	46	unsigned long acc;
	47	wchar_t c;
	48	unsigned long cutoff;
	49	int neg, any, cutlim;
e9ce8d39 A	50
e9ce8d39 A	51	/*
9385eb3d	52	* See strtol for comments as to the logic used.
e9ce8d39 A	53	*/
	54	s = nptr;
	55	do {
	56	c = *s++;
9385eb3d A	57	} while (iswspace(c));
9385eb3d A	58	if (c == L'-') {
e9ce8d39 A	59	neg = 1;
e9ce8d39 A	60	c = *s++;
5b2abdfb	61	} else {
e9ce8d39	62	neg = 0;
9385eb3d	63	if (c == L'+')
e9ce8d39 A	64	c = *s++;
	65	}
	66	if ((base == 0 \|\| base == 16) &&
9385eb3d	67	c == L'0' && (s == L'x' \|\| s == L'X')) {
e9ce8d39 A	68	c = s[1];
	69	s += 2;
	70	base = 16;
	71	}
	72	if (base == 0)
9385eb3d A	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;
e9ce8d39 A	92	else
	93	break;
	94	if (c >= base)
	95	break;
5b2abdfb	96	if (any < 0 \|\| acc > cutoff \|\| (acc == cutoff && c > cutlim))
e9ce8d39 A	97	any = -1;
	98	else {
	99	any = 1;
9385eb3d	100	acc *= base;
e9ce8d39 A	101	acc += c;
	102	}
	103	}
	104	if (any < 0) {
9385eb3d	105	acc = ULONG_MAX;
e9ce8d39	106	errno = ERANGE;
9385eb3d A	107	} else if (!any) {
	108	noconv:
	109	errno = EINVAL;
e9ce8d39 A	110	} else if (neg)
e9ce8d39 A	111	acc = -acc;
9385eb3d A	112	if (endptr != NULL)
9385eb3d A	113	endptr = (wchar_t )(any ? s - 1 : nptr);
e9ce8d39 A	114	return (acc);
e9ce8d39 A	115	}