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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1986 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef _WCS_LONGLONG
#pragma weak _wcstoul = wcstoul
#endif
#include "lint.h"
#include <limits.h>
#include <errno.h>
#include <wchar.h>
#define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \
iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A')
#define MBASE (L'z' - L'a' + 1 + 10)
#ifdef _WCS_LONGLONG
#define _WULONG_T unsigned long long
#define _WULONG_MAX ULLONG_MAX
#else /* _WCS_LONGLONG */
#define _WULONG_T unsigned long
#define _WULONG_MAX ULONG_MAX
#endif /* _WCS_LONGLONG */
#ifdef _WCS_LONGLONG
unsigned long long
wcstoull(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr,
int base)
#else /* _WCS_LONGLONG */
unsigned long
wcstoul(const wchar_t *str, wchar_t **ptr, int base)
#endif /* _WCS_LONGLONG */
{
_WULONG_T val;
wchar_t c;
int xx, neg = 0;
_WULONG_T multmax;
if (ptr != NULL)
*ptr = (wchar_t *)str; /* in case no number is formed */
if (base < 0 || base > MBASE) {
errno = EINVAL;
return (0); /* base is invalid -- should be a fatal error */
}
if (!iswalnum(c = *str)) {
while (iswspace(c)) {
c = *++str;
}
switch (c) {
case L'-':
neg++;
/*FALLTHRU*/
case L'+':
c = *++str;
}
}
if (base == 0) {
if (c != L'0')
base = 10;
else if (str[1] == L'x' || str[1] == L'X')
base = 16;
else
base = 8;
}
/*
* for any base > 10, the digits incrementally following
* 9 are assumed to be "abc...z" or "ABC...Z"
*/
if (!iswalnum(c) || (xx = DIGIT(c)) >= base) {
errno = EINVAL;
return (0); /* no number formed */
}
if (base == 16 && c == L'0' && iswxdigit(str[2]) &&
(str[1] == L'x' || str[1] == L'X')) {
c = *(str += 2); /* skip over leading "0x" or "0X" */
}
multmax = _WULONG_MAX / (_WULONG_T)base;
val = DIGIT(c);
for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) {
/* accumulate neg avoids surprises near MAXLONG */
if (val > multmax)
goto overflow;
val *= base;
if (_WULONG_MAX - val < xx)
goto overflow;
val += xx;
}
if (ptr != NULL)
*ptr = (wchar_t *)str;
return (neg ? -val : val);
overflow:
while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base)
;
if (ptr != NULL)
*ptr = (wchar_t *)str;
errno = ERANGE;
return (_WULONG_MAX);
}
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