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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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#if defined(_KERNEL)
#include <sys/null.h>
#endif /* _KERNEL */
#if defined(_KERNEL) && !defined(_BOOT)
#include <sys/errno.h>
#else /* _KERNEL && !_BOOT */
#if !defined(_BOOT) && !defined(_KMDB) && !defined(_STANDALONE)
#include "lint.h"
#endif /* !_BOOT && !_KMDB && !_STANDALONE */
#if defined(_STANDALONE)
#include <sys/cdefs.h>
#include <stand.h>
#include <limits.h>
#else
#include <errno.h>
#include <ctype.h>
#include <limits.h>
#include <stdlib.h>
#endif /* _STANDALONE */
#endif /* _KERNEL && !_BOOT */
#include "strtolctype.h"
#include <sys/types.h>
#if defined(_KERNEL) && !defined(_BOOT)
int
ddi_strtoul(const char *str, char **nptr, int base, unsigned long *result)
#else /* _KERNEL && !_BOOT */
unsigned long
strtoul(const char *str, char **nptr, int base)
#endif /* _KERNEL && !_BOOT */
{
unsigned long val;
int c;
int xx;
int neg = 0;
unsigned long multmax;
const char **ptr = (const char **)nptr;
const unsigned char *ustr = (const unsigned char *)str;
if (ptr != NULL)
*ptr = (char *)ustr; /* in case no number is formed */
if (base < 0 || base > MBASE || base == 1) {
/* base is invalid -- should be a fatal error */
#if defined(_KERNEL) && !defined(_BOOT)
return (EINVAL);
#else /* _KERNEL && !_BOOT */
errno = EINVAL;
return (0);
#endif /* _KERNEL && !_BOOT */
}
if (!isalnum(c = *ustr)) {
while (isspace(c))
c = *++ustr;
switch (c) {
case '-':
neg++;
/* FALLTHROUGH */
case '+':
c = *++ustr;
}
}
if (base == 0) {
if (c != '0')
base = 10;
else if (ustr[1] == 'x' || ustr[1] == '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 (!lisalnum(c) || (xx = DIGIT(c)) >= base) {
/* no number formed */
#if defined(_KERNEL) && !defined(_BOOT)
return (EINVAL);
#else /* _KERNEL && !_BOOT */
return (0);
#endif /* _KERNEL && !_BOOT */
}
if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
isxdigit(ustr[2]))
c = *(ustr += 2); /* skip over leading "0x" or "0X" */
multmax = ULONG_MAX / (unsigned long)base;
val = DIGIT(c);
for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
if (val > multmax)
goto overflow;
val *= base;
if (ULONG_MAX - val < (unsigned long)xx)
goto overflow;
val += xx;
c = *++ustr;
}
if (ptr != NULL)
*ptr = (char *)ustr;
#if defined(_KERNEL) && !defined(_BOOT)
*result = neg ? -val : val;
return (0);
#else /* _KERNEL && !_BOOT */
return (neg ? -val : val);
#endif /* _KERNEL && !_BOOT */
overflow:
for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
;
if (ptr != NULL)
*ptr = (char *)ustr;
#if defined(_KERNEL) && !defined(_BOOT)
return (ERANGE);
#else /* _KERNEL && !_BOOT */
errno = ERANGE;
return (ULONG_MAX);
#endif /* _KERNEL && !_BOOT */
}
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