/*
* Copyright (c) 1998-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
*
* strol.c - The functions strtol() & strtoul() are exported as public API
* via the header file ~driverkit/generalFuncs.h
*
* HISTORY
* 25-Oct-1995 Dean Reece at NeXT
* Created based on BSD4.4's strtol.c & strtoul.c.
* Removed dependency on _ctype_ by static versions of isupper()...
* Added support for "0b101..." binary constants.
* Commented out references to errno.
*/
/*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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 <string.h>
#include <stdlib.h>
#include <limits.h>
*/
#include <sys/types.h>
#include <machine/limits.h>
long strtol(const char *nptr, char **endptr, int base);
unsigned long strtoul(const char *nptr, char **endptr, int base);
quad_t strtoq(const char *nptr, char **endptr, int base);
u_quad_t strtouq(const char *nptr, char **endptr, int base);
typedef int BOOL;
static inline BOOL
isupper(char c)
{
return c >= 'A' && c <= 'Z';
}
static inline BOOL
isalpha(char c)
{
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
}
static inline BOOL
isspace(char c)
{
return c == ' ' || c == '\t' || c == '\n' || c == '\12';
}
static inline BOOL
isdigit(char c)
{
return c >= '0' && c <= '9';
}
/*
* Convert a string to a long integer.
*
* Ignores `locale' stuff. Assumes that the upper and lower case
* alphabets and digits are each contiguous.
*/
long
strtol(const char *nptr, char **endptr, int base)
{
const char *s = nptr;
unsigned long acc;
char c;
unsigned long cutoff;
int neg = 0, any, cutlim;
/*
* Skip white space and pick up leading +/- sign if any.
* If base is 0, allow 0x for hex and 0 for octal, else
* assume decimal; if base is already 16, allow 0x.
*/
do {
c = *s++;
} while (isspace(c));
if (c == '-') {
neg = 1;
c = *s++;
} else if (c == '+') {
c = *s++;
}
if ((base == 0 || base == 16) &&
c == '0' && (*s == 'x' || *s == 'X')) {
c = s[1];
s += 2;
base = 16;
} else if ((base == 0 || base == 2) &&
c == '0' && (*s == 'b' || *s == 'B')) {
c = s[1];
s += 2;
base = 2;
}
if (base == 0) {
base = c == '0' ? 8 : 10;
}
/*
* Compute the cutoff value between legal numbers and illegal
* numbers. That is the largest legal value, divided by the
* base. An input number that is greater than this value, if
* followed by a legal input character, is too big. One that
* is equal to this value may be valid or not; the limit
* between valid and invalid numbers is then based on the last
* digit. For instance, if the range for longs is
* [-2147483648..2147483647] and the input base is 10,
* cutoff will be set to 214748364 and cutlim to either
* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
* a value > 214748364, or equal but the next digit is > 7 (or 8),
* the number is too big, and we will return a range error.
*
* Set any if any `digits' consumed; make it negative to indicate
* overflow.
*/
cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
cutlim = ((int)(cutoff % (unsigned long)base));
cutoff /= (unsigned long)base;
for (acc = 0, any = 0;; c = *s++) {
if (isdigit(c)) {
c -= '0';
} else if (isalpha(c)) {
c -= isupper(c) ? 'A' - 10 : '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 = neg ? LONG_MIN : LONG_MAX;
// errno = ERANGE;
} else if (neg) {
acc = -acc;
}
if (endptr != 0) {
if (any) {
*endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
} else {
*endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
}
}
return acc;
}
unsigned long
strtoul(const char *nptr, char **endptr, int base)
{
const char *s = nptr;
unsigned long acc;
char c;
unsigned long cutoff;
int neg = 0, any, cutlim;
/*
* See strtol for comments as to the logic used.
*/
do {
c = *s++;
} while (isspace(c));
if (c == '-') {
neg = 1;
c = *s++;
} else if (c == '+') {
c = *s++;
}
if ((base == 0 || base == 16) &&
c == '0' && (*s == 'x' || *s == 'X')) {
c = s[1];
s += 2;
base = 16;
} else if ((base == 0 || base == 2) &&
c == '0' && (*s == 'b' || *s == 'B')) {
c = s[1];
s += 2;
base = 2;
}
if (base == 0) {
base = c == '0' ? 8 : 10;
}
cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
cutlim = ((int)((unsigned long)ULONG_MAX % (unsigned long)base));
for (acc = 0, any = 0;; c = *s++) {
if (isdigit(c)) {
c -= '0';
} else if (isalpha(c)) {
c -= isupper(c) ? 'A' - 10 : '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 (neg) {
acc = -acc;
}
if (endptr != 0) {
if (any) {
*endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
} else {
*endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
}
}
return acc;
}
/*
* Convert a string to a quad integer.
*
* Ignores `locale' stuff. Assumes that the upper and lower case
* alphabets and digits are each contiguous.
*/
quad_t
strtoq(const char *nptr, char **endptr, int base)
{
const char *s;
u_quad_t acc;
char c;
u_quad_t qbase, cutoff;
int neg, any, cutlim;
/*
* Skip white space and pick up leading +/- sign if any.
* If base is 0, allow 0x for hex and 0 for octal, else
* assume decimal; if base is already 16, allow 0x.
*/
s = nptr;
do {
c = *s++;
} while (isspace(c));
if (c == '-') {
neg = 1;
c = *s++;
} else {
neg = 0;
if (c == '+') {
c = *s++;
}
}
if ((base == 0 || base == 16) &&
c == '0' && (*s == 'x' || *s == 'X')) {
c = s[1];
s += 2;
base = 16;
}
if (base == 0) {
base = c == '0' ? 8 : 10;
}
/*
* Compute the cutoff value between legal numbers and illegal
* numbers. That is the largest legal value, divided by the
* base. An input number that is greater than this value, if
* followed by a legal input character, is too big. One that
* is equal to this value may be valid or not; the limit
* between valid and invalid numbers is then based on the last
* digit. For instance, if the range for quads is
* [-9223372036854775808..9223372036854775807] and the input base
* is 10, cutoff will be set to 922337203685477580 and cutlim to
* either 7 (neg==0) or 8 (neg==1), meaning that if we have
* accumulated a value > 922337203685477580, or equal but the
* next digit is > 7 (or 8), the number is too big, and we will
* return a range error.
*
* Set any if any `digits' consumed; make it negative to indicate
* overflow.
*/
qbase = (unsigned)base;
cutoff = neg ? -(u_quad_t)QUAD_MIN : QUAD_MAX;
cutlim = ((int)(cutoff % qbase));
cutoff /= qbase;
for (acc = 0, any = 0;; c = *s++) {
if (isdigit(c)) {
c -= '0';
} else if (isalpha(c)) {
c -= isupper(c) ? 'A' - 10 : 'a' - 10;
} else {
break;
}
if (c >= base) {
break;
}
if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) {
any = -1;
} else {
any = 1;
acc *= qbase;
acc += c;
}
}
if (any < 0) {
acc = neg ? QUAD_MIN : QUAD_MAX;
// errno = ERANGE;
} else if (neg) {
acc = -acc;
}
if (endptr != 0) {
if (any) {
*endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
} else {
*endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
}
}
return acc;
}
/*
* Convert a string to an unsigned quad integer.
*
* Ignores `locale' stuff. Assumes that the upper and lower case
* alphabets and digits are each contiguous.
*/
u_quad_t
strtouq(const char *nptr,
char **endptr,
int base)
{
const char *s = nptr;
u_quad_t acc;
char c;
u_quad_t qbase, cutoff;
int neg, any, cutlim;
/*
* See strtoq for comments as to the logic used.
*/
s = nptr;
do {
c = *s++;
} while (isspace(c));
if (c == '-') {
neg = 1;
c = *s++;
} else {
neg = 0;
if (c == '+') {
c = *s++;
}
}
if ((base == 0 || base == 16) &&
c == '0' && (*s == 'x' || *s == 'X')) {
c = s[1];
s += 2;
base = 16;
}
if (base == 0) {
base = c == '0' ? 8 : 10;
}
qbase = (unsigned)base;
cutoff = (u_quad_t)UQUAD_MAX / qbase;
cutlim = ((int)((u_quad_t)UQUAD_MAX % qbase));
for (acc = 0, any = 0;; c = *s++) {
if (isdigit(c)) {
c -= '0';
} else if (isalpha(c)) {
c -= isupper(c) ? 'A' - 10 : 'a' - 10;
} else {
break;
}
if (c >= base) {
break;
}
if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) {
any = -1;
} else {
any = 1;
acc *= qbase;
acc += c;
}
}
if (any < 0) {
acc = UQUAD_MAX;
// errno = ERANGE;
} else if (neg) {
acc = -acc;
}
if (endptr != 0) {
if (any) {
*endptr = __CAST_AWAY_QUALIFIER(s - 1, const, char *);
} else {
*endptr = __CAST_AWAY_QUALIFIER(nptr, const, char *);
}
}
return acc;
}