git.saurik.com Git - apple/libc.git/blame_incremental

... / ...

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/wcstol.c,v 1.2 2007/01/09 00:28:01 imp Exp $");
	32
	33	#include "xlocale_private.h"
	34
	35	#include <ctype.h>
	36	#include <errno.h>
	37	#include <limits.h>
	38	#include <wchar.h>
	39	#include <wctype.h>
	40
	41	/*
	42	* Convert a string to a long integer.
	43	*/
	44	long
	45	wcstol_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
	46	int base, locale_t loc)
	47	{
	48	const wchar_t *s;
	49	unsigned long acc;
	50	wchar_t c;
	51	unsigned long cutoff;
	52	int neg, any, cutlim;
	53
	54	NORMALIZE_LOCALE(loc);
	55	/*
	56	* See strtol for comments as to the logic used.
	57	*/
	58	s = nptr;
	59	do {
	60	c = *s++;
	61	} while (iswspace_l(c, loc));
	62	if (c == '-') {
	63	neg = 1;
	64	c = *s++;
	65	} else {
	66	neg = 0;
	67	if (c == L'+')
	68	c = *s++;
	69	}
	70	if ((base == 0 \|\| base == 16) &&
	71	c == L'0' && (s == L'x' \|\| s == L'X')) {
	72	c = s[1];
	73	s += 2;
	74	base = 16;
	75	}
	76	if (base == 0)
	77	base = c == L'0' ? 8 : 10;
	78	acc = any = 0;
	79	if (base < 2 \|\| base > 36)
	80	goto noconv;
	81
	82	cutoff = neg ? (unsigned long)-(LONG_MIN + LONG_MAX) + LONG_MAX
	83	: LONG_MAX;
	84	cutlim = cutoff % base;
	85	cutoff /= base;
	86	for ( ; ; c = *s++) {
	87	#ifdef notyet
	88	if (iswdigit_l(c, loc))
	89	c = digittoint_l(c, loc);
	90	else
	91	#endif
	92	if (c >= L'0' && c <= L'9')
	93	c -= L'0';
	94	else if (c >= L'A' && c <= L'Z')
	95	c -= L'A' - 10;
	96	else if (c >= L'a' && c <= L'z')
	97	c -= L'a' - 10;
	98	else
	99	break;
	100	if (c >= base)
	101	break;
	102	if (any < 0 \|\| acc > cutoff \|\| (acc == cutoff && c > cutlim))
	103	any = -1;
	104	else {
	105	any = 1;
	106	acc *= base;
	107	acc += c;
	108	}
	109	}
	110	if (any < 0) {
	111	acc = neg ? LONG_MIN : LONG_MAX;
	112	errno = ERANGE;
	113	} else if (!any) {
	114	noconv:
	115	errno = EINVAL;
	116	} else if (neg)
	117	acc = -acc;
	118	if (endptr != NULL)
	119	endptr = (wchar_t )(any ? s - 1 : nptr);
	120	return (acc);
	121	}
	122
	123	long
	124	wcstol(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base)
	125	{
	126	return wcstol_l(nptr, endptr, base, __current_locale());
	127	}