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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma weak strtoll = _strtoll
#include "synonyms.h"
#include <errno.h>
#include <ctype.h>
#include <limits.h>
#include <sys/types.h>
#include <stdlib.h>
#define DIGIT(x) \
(isdigit(x) ? (x) - '0' : islower(x) ? (x) + 10 - 'a' : (x) + 10 - 'A')
#define MBASE ('z' - 'a' + 1 + 10)
/*
* The following macro is a local version of isalnum() which limits
* alphabetic characters to the ranges a-z and A-Z; locale dependent
* characters will not return 1. The members of a-z and A-Z are
* assumed to be in ascending order and contiguous
*/
#define lisalnum(x) \
(isdigit(x) || ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z'))
longlong_t
strtoll(const char *str, char **nptr, int base)
{
longlong_t val;
int c;
int xx, neg = 0;
longlong_t multmin;
longlong_t limit;
longlong_t llong_min, llong_max;
const char **ptr = (const char **)nptr;
const unsigned char *ustr = (const unsigned char *)str;
llong_min = LLONG_MIN; /* from a local version of limits.h */
llong_max = LLONG_MAX;
if (ptr != (const char **)0)
*ptr = (char *)ustr; /* in case no number is formed */
if (base < 0 || base > MBASE || base == 1) {
errno = EINVAL;
return (0); /* base is invalid -- should be a fatal error */
}
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)
return (0); /* no number formed */
if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
isxdigit(ustr[2]))
c = *(ustr += 2); /* skip over leading "0x" or "0X" */
/* this code assumes that abs(llong_min) >= abs(llong_max) */
if (neg)
limit = llong_min;
else
limit = -llong_max;
multmin = limit / base;
val = -DIGIT(c);
for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
/* accumulate neg avoids surprises near llong_max */
if (val < multmin)
goto overflow;
val *= base;
if (val < limit + xx)
goto overflow;
val -= xx;
c = *++ustr;
}
if (ptr != (const char **)0)
*ptr = (char *)ustr;
return (neg ? val : -val);
overflow:
for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
;
if (ptr != (const char **)0)
*ptr = (char *)ustr;
errno = ERANGE;
return (neg ? llong_min : llong_max);
}
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